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WO2015060404A1 - Absorption-type refrigeration system - Google Patents

Absorption-type refrigeration system Download PDF

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Publication number
WO2015060404A1
WO2015060404A1 PCT/JP2014/078256 JP2014078256W WO2015060404A1 WO 2015060404 A1 WO2015060404 A1 WO 2015060404A1 JP 2014078256 W JP2014078256 W JP 2014078256W WO 2015060404 A1 WO2015060404 A1 WO 2015060404A1
Authority
WO
WIPO (PCT)
Prior art keywords
cold storage
absorption
storage operation
operation signal
absorption refrigerator
Prior art date
Application number
PCT/JP2014/078256
Other languages
French (fr)
Japanese (ja)
Inventor
正登 小粥
義裕 市野
元巳 稲垣
Original Assignee
矢崎エナジーシステム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 矢崎エナジーシステム株式会社 filed Critical 矢崎エナジーシステム株式会社
Priority to CN201480058334.2A priority Critical patent/CN105683684B/en
Publication of WO2015060404A1 publication Critical patent/WO2015060404A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/04—Arrangement or mounting of control or safety devices for sorption type machines, plants or systems
    • F25B49/043—Operating continuously
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
    • F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
    • F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/24—Storage receiver heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B27/00—Machines, plants or systems, using particular sources of energy
    • F25B27/002—Machines, plants or systems, using particular sources of energy using solar energy
    • F25B27/007—Machines, plants or systems, using particular sources of energy using solar energy in sorption type systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/04—Heat pumps of the sorption type

Definitions

  • the present invention relates to an absorption refrigeration system.
  • a solar heat utilization system including a solar heat collector that heats a heat medium by receiving sunlight and a heat storage tank that stores heat by introducing a heat medium heated by the solar heat collector has been proposed.
  • piping connection between the heat storage tank and the absorption chiller, and circulating the heat medium between them, heating the dilute solution in the regenerator of the absorption chiller An absorption refrigeration system to be used has also been proposed (see Patent Document 1).
  • the dilute solution can be heated using renewable energy called solar heat, and the fuel cost required for heating the dilute solution can be reduced.
  • a heat storage tank is interposed between the solar heat collector and the absorption refrigerator, and this acts as a buffer. Can be supplied to an absorption refrigerator. That is, when the amount of solar radiation is small, if a heat medium is supplied directly from the solar heat collector to the absorption refrigerator, the heat medium having a low temperature will be supplied to the absorption refrigerator, and efficient operation will be performed. Will not be able to.
  • the absorption refrigeration system includes the heat storage tank, a heat medium having a stable temperature can be supplied to the absorption refrigeration machine, so that an efficient operation can be performed.
  • the absorption chiller is connected to the indoor unit by piping so that the coolant is supplied to the indoor unit.
  • a cold storage tank for storing cold is provided on the pipe from the absorption chiller to the indoor unit.
  • the cold storage operation is performed in the absorption chiller and cold storage is performed by the cold storage tank.
  • the above problem is not limited to the method of heating the heat medium by solar heat, but a system that heats the heat medium by using exhaust heat to store the heat medium, or by using renewable energy such as geothermal or biomass. This is a common problem even in an absorption refrigeration system having a system for storing heat by heating.
  • the above problem is not limited to an absorption refrigeration system including an absorption chiller connected to an indoor unit, but an absorption refrigeration system including an absorption chiller connected to another external device such as an industrial cooling device. This is a common problem.
  • the present invention has been made to solve such a conventional problem, and the object of the present invention is to enable more efficient operation and reduce the possibility of condensation.
  • the object is to provide an absorption refrigeration system.
  • the absorption refrigeration system of the present invention comprises a heat collector that heats a heat medium with renewable energy that can be permanently used as an exhaust heat or energy source from equipment, and a heat medium that is heated by the heat collector.
  • An absorption refrigerator that introduces and heats a dilute solution in a regenerator and obtains a cooling liquid by a circulation cycle of the regenerator, condenser, evaporator, and absorber, and cooling obtained by the absorption refrigerator
  • the circulation flow path for circulating the liquid between the evaporator of the absorption refrigeration machine and the external device, the branch flow path branched from the circulation flow path, and the flow direction of the coolant flowing through the circulation flow path are switched.
  • a switching valve that flows into the branch flow path, a cool storage tank that is provided on the branch flow path and stores the cold by introducing the coolant obtained by the absorption chiller, and when a predetermined condition is satisfied , A cold storage operation signal to the absorption refrigerator And a controller that prohibits transmission of a cold storage operation signal when the predetermined condition is not satisfied, and the controller controls the switching valve to transmit the cold storage operation signal when the cold storage operation signal is transmitted. From the controller, when the absorption refrigerator receives the cold storage operation signal from the controller, than when not receiving the cold storage operation signal from the controller, The target temperature of the coolant in the flow path from the absorption refrigerator to the external device is lowered.
  • the absorption refrigeration system of the present invention when a predetermined condition is satisfied, a cold storage operation signal is transmitted to the absorption refrigerator, and when the predetermined condition is not satisfied, transmission of the cold storage operation signal is prohibited,
  • the target temperature of the coolant in the flow path from the absorption chiller to the external device is lowered than when the cold storage operation signal is not received from the controller. For this reason, when performing a cold storage operation, the target temperature of the coolant can be lowered, preventing the coolant temperature from becoming lower than necessary during normal cooling operation and deteriorating the operation efficiency. can do.
  • the target temperature of the coolant is lowered, so that the coolant having a temperature lower than necessary during normal cooling is not supplied to the external device, and condensation may occur in the external device. Will be reduced. Therefore, it is possible to provide an absorption refrigeration system that enables more efficient operation and can reduce the possibility of condensation.
  • the absorption refrigeration system further includes a cold storage tank temperature sensor that detects a cold storage temperature of the cold storage tank, and the absorption refrigerator is receiving the cold storage operation signal, the cold storage tank
  • a cold storage operation is started in which the cooling liquid is introduced into the cold storage tank for cold storage, and the cold storage temperature detected by the cold storage tank temperature sensor is It is preferable that the cold storage operation is stopped when the temperature is equal to or lower than a second predetermined value lower than the predetermined value.
  • the absorption chiller when the absorption chiller receives a cold storage operation signal, the absorption chiller is installed in the cold storage tank when the cold storage temperature detected by the cold storage tank temperature sensor is equal to or higher than the first predetermined value.
  • the cold storage operation for introducing the coolant and storing the cold is started. Further, the cold storage operation is stopped when the cold storage temperature detected by the cold storage tank temperature sensor is equal to or lower than a second predetermined value lower than the first predetermined value. For this reason, the cold storage operation is performed in a state where sufficient cold heat cannot be secured in the cold storage tank, and the cold storage operation is stopped when sufficient cold heat is secured in the cold storage tank, preventing unnecessary cold storage operation. can do.
  • control method of the absorption refrigeration system includes a heat collector that heats a heat medium by renewable energy that can be permanently used as an exhaust heat or energy source from the device, and a heating by the heat collector.
  • An absorption refrigerator that heats the diluted solution in the regenerator by introducing the heated heat medium and obtains a cooling liquid by a circulation cycle of the regenerator, the condenser, the evaporator, and the absorber, and the absorption refrigerator
  • a switching valve that switches the flow direction of the refrigerant to flow into the branch flow path, a regenerative tank that is provided on the branch flow path and that cools and stores the coolant obtained by the absorption chiller, and the absorption type Sending cool storage operation signal to refrigerator and And a controller that prohibits transmission.
  • the cool storage operation signal is transmitted from the controller to the absorption chiller in the first step, the third step of flowing the coolant from the flow into the branch flow path, the second step, A fourth process for lowering the target temperature of the coolant in the flow path from the absorption chiller to the external device, compared to a case where a cool storage operation signal is not transmitted from the controller to the absorption chiller.
  • a cold storage operation signal is transmitted to the absorption chiller, and when the predetermined condition is not satisfied, transmission of the cold storage operation signal is prohibited.
  • the target temperature of the coolant in the flow path from the absorption refrigerator to the external device is lowered as compared with the case where the cold storage operation signal is not received from the controller. For this reason, when performing a cold storage operation, the target temperature of the coolant can be lowered, preventing the coolant temperature from becoming lower than necessary during normal cooling operation and deteriorating the operation efficiency. can do.
  • the target temperature of the coolant is lowered, so that the coolant having a temperature lower than necessary during normal cooling is not supplied to the external device, and condensation may occur in the external device. Will be reduced. Therefore, it is possible to provide an absorption refrigeration system that enables more efficient operation and can reduce the possibility of condensation.
  • FIG. 1 is a schematic configuration diagram of an absorption refrigeration system according to an embodiment of the present invention.
  • FIG. 2 is a schematic configuration diagram illustrating an example of an absorption refrigerator.
  • FIG. 3 is a diagram illustrating control of the heat collection pump according to the present embodiment.
  • FIG. 4 is a diagram illustrating the operation of the absorption refrigerator during normal cooling operation.
  • FIG. 5 is a diagram for explaining the operation of the absorption refrigeration system during the cold storage operation, where (a) shows the operation of the absorption chiller and (b) shows the operation of the entire system.
  • FIG. 6 is a flowchart showing processing in the system controller of the absorption refrigeration system according to the present embodiment, and shows processing for transmitting and prohibiting a cold storage operation signal.
  • FIG. 7 is a flowchart showing processing in the system controller of the absorption refrigeration system according to the present embodiment, and shows processing of the switching valve.
  • FIG. 1 is a schematic configuration diagram of an absorption refrigeration system according to an embodiment of the present invention.
  • an absorption refrigeration system 1 heats a diluted solution of an absorption refrigeration machine 21 using solar heat, and includes a first system 10 and a second system 20. And a third system 30.
  • the first system 10 heats a heat medium using solar heat, and includes a solar heat collector (heat collector) 11, a heat storage tank 12, a heat collection channel 13, and a heat collection pump 14. I have.
  • the first system 10 heats the heat medium using solar heat, but is not limited thereto, and may heat the heat medium using exhaust heat. Further, the heating medium may be heated using renewable energy (one that can be permanently used as an energy source) such as geothermal or biomass.
  • the solar heat collector 11 heats the heat medium by receiving sunlight, and is installed at a position where it is easy to receive sunlight, such as on a roof.
  • As the heat medium water, antifreeze, propylene glycol aqueous solution, or the like is used.
  • the heat storage tank 12 introduces a heat medium heated by the solar heat collector 11 and stores heat.
  • the heat storage tank 12 may be a tank that stores the heat medium therein, or may be one that stores heat of the introduced heat medium using a heat storage material.
  • the heat storage tank 12 stores heat with a heat storage material
  • a heat storage material for example, magnesium hydroxide is used as the heat storage material, but is not limited thereto.
  • the heat storage tank 12 may function as a so-called hot water storage tank, and hot water may be supplied to a home or the like.
  • the heat storage tank 12 may be of a type including a heat exchanger.
  • the heat collection channel 13 is a pipe that circulates the heat medium from the heat storage tank 12 through the solar heat collector 11 to the heat storage tank 12 again.
  • the flow path from the heat storage tank 12 to the solar heat collector 11 is referred to as a first heat collection flow path 13a
  • the flow path from the solar heat collector 11 to the heat storage tank 12 is referred to as a second heat collection flow path 13b.
  • the heat collection pump 14 is provided in the first heat collection flow path 13a of the heat collection flow path 13, and serves as a power source for circulating the heat medium from the heat storage tank 12 through the solar heat collector 11 to the heat storage tank 12 again. It is.
  • the heat medium circulates through the heat collecting flow path 13 by operating the heat collecting pump 14.
  • the heat medium is heated by the solar heat collector 11, reaches the heat storage tank 12 through the second heat collection flow path 13 b, and is stored in the heat storage tank 12.
  • the second system 20 supplies a heat medium heated in a heat storage tank 12 and a heat medium heated through a heat storage material to the absorption refrigeration machine 21, and includes the absorption refrigeration machine 21 and the heat medium.
  • a flow path 22 and a heat medium pump 23 are provided.
  • the absorption refrigerator 21 heats a dilute solution in a regenerator and obtains a cooling liquid by a circulation cycle of the regenerator, a condenser, an evaporator, and an absorber.
  • FIG. 2 is a schematic configuration diagram showing an example of the absorption refrigerator 21.
  • the regenerator 101 includes, for example, water serving as a refrigerant (hereinafter, the refrigerant vaporized is referred to as refrigerant vapor, and the refrigerant liquefied is referred to as liquid refrigerant), and lithium bromide (absorbent liquid) ( A dilute solution (solution having a low concentration of the absorbing solution) mixed with LiBr) is heated.
  • the regenerator 101 is provided with a heat medium flow path 22, and a dilute solution is sprayed on the heat medium flow path 22 and heated.
  • the regenerator 101 generates a refrigerant vapor and a concentrated solution (a solution having a high concentration of absorption liquid) by releasing the vapor from the dilute solution by this heating.
  • the condenser 102 liquefies the refrigerant vapor supplied from the regenerator 101.
  • a first cold water heat transfer tube 102a is inserted into the condenser 102. Cooling water is supplied to the first cold water heat transfer tube 102a from a cooling tower or the like, and the evaporated refrigerant vapor is liquefied by the cooling water in the first cold water heat transfer tube 102a. Further, the liquid refrigerant liquefied by the condenser 102 is supplied to the evaporator 103.
  • the evaporator 103 evaporates the liquid refrigerant.
  • the 2nd cold water heat exchanger tube (circulation flow path) 31 connected to an indoor unit (an example of an external device) is provided.
  • the second cold water heat transfer tube 31 is connected to, for example, an indoor unit, and water warmed by cooling by the indoor unit flows. Further, the inside of the evaporator 103 is in a vacuum state. For this reason, the evaporation temperature of water as a refrigerant is about 5 ° C. Therefore, the liquid refrigerant sprayed on the second cold water heat transfer tube 31 evaporates depending on the temperature of the second cold water heat transfer tube 31.
  • the temperature of the water in the second cold water heat transfer tube 31 is deprived of the temperature by evaporation of the liquid refrigerant.
  • the water of the 2nd cold water heat exchanger tube 31 will be supplied to an indoor unit as cold water (an example of a cooling fluid), and an indoor unit will supply cold air indoors using cold water.
  • the absorber 104 absorbs the refrigerant evaporated in the evaporator 103.
  • a concentrated solution is supplied from the regenerator 101 into the absorber 104, and the evaporated refrigerant is absorbed by the concentrated solution to generate a diluted solution.
  • the absorber 104 is inserted with a third cold water heat transfer tube 104a.
  • the cooling water flows through the third cold water heat transfer tube 104a, and the absorbed heat generated by the absorption of the refrigerant of the concentrated solution is removed by the cooling water of the third cold water heat transfer tube 104a.
  • the third cold water heat transfer tube 104a is connected to the first cold water heat transfer tube 102a.
  • the absorber 104 supplies the regenerator 101 with the dilute solution whose density
  • the 2nd cold water heat exchanger tube 31 is connected to the indoor unit in the above, it is not restricted to this, You may connect with an industrial cooling device etc.
  • an indoor unit will be described as an example of an external device.
  • the absorption chiller 21 includes a control unit 105.
  • the control unit 105 includes a CPU (Central Processing Unit) and controls the entire absorption refrigerator 21.
  • the control unit 105 is configured to change the control content based on a signal from a system controller 44 described later.
  • the heat medium flow path 22 is a pipe that circulates the heat medium from the heat storage tank 12 through the regenerator 101 of the absorption refrigerator 21 to the heat storage tank 12 again.
  • the flow path from the heat storage tank 12 to the regenerator 101 of the absorption chiller 21 is referred to as a first heat medium flow path 22a
  • the flow path from the regenerator 101 of the absorption refrigeration machine 21 to the heat storage tank 12 is the first. This is referred to as two heat medium flow path 22b.
  • the heat medium pump 23 is provided in the first heat medium flow path 22 a of the heat medium flow path 22, and circulates the heat medium from the heat storage tank 12 to the heat storage tank 12 again through the regenerator 101 of the absorption refrigerator 21. It becomes a power source to be made.
  • the third system 30 is a part that sends out the coolant obtained by the absorption refrigerator 21 to the indoor unit or performs cold storage using the coolant, and the second cold water heat transfer pipe 31 (hereinafter referred to as circulation).
  • circulation the second cold water heat transfer pipe 31
  • a cold storage tank 32, first and second switching valves 33 a and 33 b, first to fourth branch flow paths 34 a to 34 d, and a circulation pump 35 are provided.
  • the above-described circulation flow path 31 is a flow path for circulating cold water obtained by the absorption chiller 21 between the evaporator 103 of the absorption chiller 21 and the indoor unit.
  • a channel from the absorption chiller 21 to the indoor unit is referred to as a first circulation channel 31a
  • a channel from the indoor unit to the absorption chiller 21 is referred to as a second circulation channel 31b. Called.
  • the cold storage tank 32 is provided on a flow path (first and second branch flow paths 34 a, 34 b) branched from the first circulation flow path 31 a among the circulation flow paths 31, and obtained by the absorption refrigerator 21. Cold water is introduced to store cold.
  • the cold storage tank 32 may be a tank that stores cold water therein, or may store cold heat of the introduced cold water using a cold storage material.
  • the cool storage material is, for example, a mixture of water and a gel agent (natural polymer), but is not particularly limited thereto.
  • the cold storage tank 32 may be of a type including a heat exchanger.
  • the first switching valve 33a is a three-way valve provided on the first circulation channel 31a, and the first and second ports A and B are located on the first circulation channel 31a. One end of the first branch channel 34 a is connected to the third port C of the first switching valve 33 a, and the other end is connected to the inlet of the regenerator 32. For this reason, the first switching valve 33a switches between a route (AB) for supplying cold water from the absorption refrigeration machine 21 to the indoor unit and a route (AC) for supplying the cold storage tank 32.
  • the second switching valve 33 b is a three-way valve provided on the outlet side of the cold storage tank 32.
  • the second branch channel 34b has one end connected to the outlet of the regenerator 32 and the other end connected to the first port D of the second switching valve 33b.
  • the third branch channel 34c has one end connected to the second port E of the second switching valve 33b and the other end connected to the second circulation channel 31b.
  • the fourth branch pipe 34d has one end connected to the third port F of the second switching valve 33b and the other end connected to the downstream side of the first switching valve 33a of the first circulation channel 31a. For this reason, the second switching valve 33b switches between a route (DE) for returning the cold water from the cold storage tank 32 to the second circulation channel 31b and a route (DF) for supplying the indoor unit.
  • DE route
  • DF route
  • the circulation pump 35 is provided at a position downstream of the connection point between the second circulation channel 31 b and the third branch channel 34 c in the second circulation channel 31 b, and the evaporator 103 of the absorption chiller 21. To the power source for circulating cold water to the evaporator 103 of the absorption refrigerator 21 again through the indoor unit.
  • the circulation pump 35 does not supply cold water to the indoor unit without absorbing the cold water. It becomes a power source for circulating cold water through the refrigerator 21 and the cold storage tank 32.
  • the absorption refrigeration system 1 includes a heat collector temperature sensor 41, a heat storage tank temperature sensor 42, a cold storage tank temperature sensor 43, and a system controller (controller) 44.
  • the heat collector temperature sensor 41 detects the temperature of the heat medium from the solar heat collector 11 and transmits a signal corresponding to the heat medium temperature to the system controller 44.
  • the heat storage tank temperature sensor 42 detects the temperature of the heat medium in the heat storage tank 12 (heat storage temperature), and transmits a signal corresponding to the heat medium temperature to the system controller 44.
  • the cold storage tank temperature sensor 43 detects the temperature of the cold water in the cold storage tank 32 (cold storage temperature), and transmits a signal corresponding to the cold water temperature to the system controller 44.
  • the system controller 44 includes a CPU and controls the entire absorption refrigeration system 1.
  • the system controller 44 according to the present embodiment has a function of transmitting a cold storage operation signal to the control unit 105 of the absorption chiller 21 or prohibiting the transmission.
  • the target temperature of the coolant hereinafter referred to as the outlet
  • the target temperature of the coolant is greater than when the cold storage operation signal is not received. Reduce target temperature.
  • FIG. 3 is a diagram illustrating control of the heat collecting pump 14 according to the present embodiment.
  • the system controller 44 inputs a signal from the heat collector temperature sensor 41 and a signal from the heat storage tank temperature sensor 42.
  • the system controller 44 calculates a differential temperature based on these signals. This differential temperature is obtained by subtracting the temperature detected by the heat storage tank temperature sensor 42 from the temperature detected by the heat collector temperature sensor 41.
  • the system controller 44 determines whether or not the temperature difference is equal to or higher than T1 ° C. shown in FIG. 3. When it is determined that the temperature difference is equal to or higher than T1 ° C., the system controller 44 operates the heat collecting pump 14 (ON). In this case, the heat collecting pump 14 is kept stopped (OFF).
  • the system controller 44 After the operation of the heat collection pump 14, the system controller 44 inputs signals from the heat collector temperature sensor 41 and the heat storage tank temperature sensor 42, and calculates a differential temperature. Then, the system controller 44 determines whether the temperature difference is equal to or lower than T2 ° C. shown in FIG. When the system controller 44 determines that the temperature is equal to or lower than T2 ° C., the system controller 44 stops the heat collecting pump 14 (OFF). When the system controller 44 determines that the temperature is not lower than T2 ° C., the system controller 44 keeps the heat collecting pump 14 in an operating state (ON).
  • the absorption refrigerator 21 performs a normal cooling operation and a cold storage operation.
  • the system controller 44 operates the heat medium pump 23 to transfer the heat medium from the heat storage tank 12.
  • the refrigerating machine 101 of the absorption refrigerator 21 is supplied. Thereby, the heat medium from the heat storage tank 12 is used for heating the dilute solution in the regenerator 101.
  • FIG. 4 is a diagram for explaining the operation of the absorption refrigerator 21 during the normal cooling operation.
  • the control unit 105 of the absorption refrigerator 21 stores a temperature adjustment stop temperature T3 ° C. and a temperature adjustment start temperature T4 ° C. during normal cooling operation.
  • the third system 30 includes a temperature sensor (not shown) that detects the temperature of the coolant in the flow path from the absorption chiller 21 to the indoor unit (hereinafter referred to as outlet temperature). The absorption refrigerator 21 is controlled based on the signal from the temperature sensor.
  • the control unit 105 temporarily stops the operation. Further, the control unit 105 resumes the operation when the outlet temperature becomes equal to or higher than the temperature adjustment start temperature T4 ° C. during the temporary stop. During the temporary stop, the circulation pump 35 is operating and the cold water is circulated.
  • FIG. 5 is a diagram for explaining the operation of the absorption refrigeration system 1 during the cold storage operation, where (a) shows the operation of the absorption refrigeration machine 21 and (b) shows the operation of the entire system 1.
  • the control unit 105 of the absorption refrigerator 21 stores a temperature adjustment stop temperature T5 ° C. and a temperature adjustment start temperature T6 ° C. during the cold storage operation.
  • the temperature adjustment stop temperature T5 ° C. during the cold storage operation is lower than the temperature adjustment stop temperature T3 ° C. during the normal cooling operation
  • the temperature adjustment start temperature T6 ° C. during the cold storage operation is the temperature adjustment start during the normal cooling operation.
  • the temperature is lower than T4 ° C.
  • the control unit 105 When the outlet temperature detected by the temperature sensor during the cold storage operation of the absorption refrigerator 21 is equal to or lower than the temperature control stop temperature T5 ° C., the control unit 105 temporarily stops the operation. In addition, when the outlet temperature becomes equal to or higher than the temperature adjustment start temperature T6 ° C. during the temporary stop, the control unit 105 resumes the operation. During the temporary stop, the circulation pump 35 is operating and the cold water is circulated.
  • the system controller 44 stores a cold storage operation end temperature T7 ° C. (second predetermined value) and a cold storage operation start temperature T8 ° C. (first predetermined value) shown in FIG.
  • the cool storage operation end temperature T7 ° C is higher than the temperature control stop temperature T5 ° C during the cool storage operation.
  • the cold storage operation start temperature T8 ° C. is the same as the temperature adjustment start temperature T6 ° C. during the cold storage operation, and is lower than the temperature control start temperature T4 ° C. during the normal cooling operation.
  • the system controller 44 stops the entire system 1 (excluding the operation of the heat collecting pump 14) when the cold storage temperature detected by the cold storage tank temperature sensor 43 during the cold storage operation becomes equal to or lower than the cold storage operation end temperature T7 ° C. That is, the operation of the heat medium pump 23 and the circulation pump 35 stops, and the absorption refrigerator 21 stops the production of cold water by the circulation cycle.
  • the system controller 44 starts the operation of the entire system when the cold storage temperature detected by the cold storage tank temperature sensor 43 becomes equal to or higher than the cold storage operation start temperature T8 ° C. while the entire system is stopped. That is, the heat medium pump 23 and the circulation pump 35 start operation, and in the absorption refrigerator 21, cold water is obtained by the circulation cycle.
  • the system controller 44 determines whether or not to perform a cold storage operation, and outputs a cold storage operation signal to the control unit 105 of the absorption chiller 21 when it is determined to perform the cold storage operation.
  • the control unit 105 of the absorption refrigerator 21 shifts the control content from the one shown in FIG. 4 to the one shown in FIG. That is, when the control unit 105 receives the cold storage operation signal, the control unit 105 lowers the target outlet temperature than when the cold storage operation signal is not received.
  • the cool storage operation signal can be transmitted is referred to a timer in the system controller 44, and if the cool storage operation date or the cool storage operation time zone (an example of a predetermined condition), the cool storage operation signal is transmitted and the normal air conditioning day or normal Transmission of the cold storage operation signal is prohibited during the air conditioning time period.
  • system controller 44 also executes control of the first and second switching valves 33a and 33b. That is, the system controller 44 controls the first switching valve 33a to select the AB route and controls the second switching valve 33b to select the DE route during normal cooling operation. Further, the system controller 44 controls the first switching valve 33a to select the AC route during the cold storage operation, and controls the second switching valve 33b to select the DE route.
  • the indoor unit can also be cooled by cold water supplied from the cold storage tank 32. Therefore, when the cooling operation is performed using the cold water in the cold storage tank 32, the system controller 44 controls the first switching valve 33a to select the AC route and also controls the second switching valve 33b. To select the DF route.
  • FIG. 6 is a flowchart showing processing in the system controller 44 of the absorption refrigeration system 1 according to the present embodiment, and shows processing for transmitting and prohibiting a cold storage operation signal. 6 is executed until the entire system 1 is stopped.
  • the system controller 44 makes a timer determination (S1). As a result of the timer determination, when the current time is the cold storage operation day or the cold storage operation time zone (an example of the predetermined condition) (S1: the cold storage operation date or the cold storage operation time zone), the system controller 44 absorbs the cold storage operation signal. 21 (S2), and then the processing shown in FIG. 6 proceeds to step S1.
  • the system controller 44 determines whether the current time is a normal air conditioning day or a normal air conditioning time zone (S1: normal air conditioning date or normal air conditioning time zone). If the result of the timer determination indicates that the current time is a normal air conditioning day or a normal air conditioning time zone (S1: normal air conditioning date or normal air conditioning time zone), the system controller 44 has a current air conditioning load, that is, a cooling operation from the user. Is judged (S3). If there is currently no air conditioning load (S3: NO), the system controller 44 transmits a cold storage operation signal to the absorption chiller 21 (S2), and then the processing shown in FIG. 6 proceeds to step S1.
  • step S3 If there is a current air conditioning load (S3: YES), the system controller 44 prohibits transmission of the cold storage operation signal (S4), and then the processing shown in FIG. 6 proceeds to step S1.
  • FIG. 7 is a flowchart showing processing in the system controller 44 of the absorption refrigeration system 1 according to this embodiment, and shows processing of the switching valves 33a and 33b. 7 is executed until the entire system 1 is stopped.
  • the system controller 44 determines whether it is during a cold storage operation (S11). Whether or not it is during the cold storage operation may be determined based on whether or not the cold storage operation signal is transmitted in step S2 of FIG. 6, or may be determined in the same manner as the timer determination as in step S1 of FIG. May be.
  • the system controller 44 controls the first switching valve 33a to select the AC route, and controls the second switching valve 33b to control DE.
  • a route is selected (S12). That is, by selecting the above route, the system controller 44 circulates between the absorption chiller 21 and the cold storage tank 32 without supplying cold water to the indoor unit. Then, the processing shown in FIG. 7 proceeds to step S11.
  • control unit 105 of the absorption chiller 21 decreases the target outlet temperature as shown in FIGS. 4 and 5A.
  • the system controller 44 determines whether it is during normal cooling operation (S13). In this case, for example, based on a signal from the cold storage tank temperature sensor 43, the system controller 44 determines that the normal cooling operation is being performed when the cold storage temperature of the cold storage tank 32 exceeds a predetermined temperature (S13: YES). If not, it is determined that it is not during normal cooling operation (S13: NO).
  • the system controller 44 controls the first switching valve 33a to select the AB route and also controls the second switching valve 33b.
  • the DE route is selected (S14). That is, by selecting the above route, the system controller 44 circulates between the absorption refrigerator 21 and the indoor unit without supplying cold water to the cold storage tank 32. Then, the processing shown in FIG. 7 proceeds to step S11.
  • the system controller 44 determines whether to perform cooling operation using the cold water in the cold storage tank 32 (S15). In this case, for example, based on a signal from the cold storage tank temperature sensor 43, the system controller 44 determines that the cooling using the cold water in the cold storage tank 32 is performed when the cold storage temperature of the cold storage tank 32 is equal to or lower than a predetermined temperature. (S15: YES), otherwise, it is determined not to perform cooling using the cold water in the cold storage tank 32 (S15: NO).
  • the system controller 44 controls the first switching valve 33a to select the AC route and the second switching.
  • the valve 33b is controlled to select the DF route (S16). That is, by selecting the above route, the system controller 44 circulates cold water between the absorption chiller 21 and the indoor unit through the cold storage tank 32. Then, the process shown in FIG. 7 ends.
  • step S11 when it is determined not to perform cooling using the cold water in the cold storage tank 32 (S15: NO), the process proceeds to step S11.
  • the absorption refrigeration system 1 when a predetermined condition is satisfied, a cold storage operation signal is transmitted to the absorption refrigeration machine 21, and when the predetermined condition is not satisfied.
  • the absorption refrigerator 21 In the case where the transmission of the cold storage operation signal is prohibited and the cold storage operation signal is received from the system controller 44, the absorption refrigerator 21 is directed to the indoor unit more than the case where the cold storage operation signal is not received from the system controller 44.
  • the target temperature of the coolant in the 1 circulation channel 31a is lowered. For this reason, when performing a cold storage operation, the target temperature of the coolant can be lowered, preventing the coolant temperature from becoming lower than necessary during normal cooling operation and deteriorating the operation efficiency. can do.
  • the target temperature of the cooling liquid is lowered, so that the cooling liquid having a temperature lower than necessary during normal cooling is not supplied to the indoor unit, and condensation may occur in the indoor unit. Will be reduced. Therefore, it is possible to provide the absorption refrigeration system 1 that enables more efficient operation and can reduce the possibility of condensation.
  • the absorption refrigerator 21 when the absorption refrigerator 21 is receiving the cool storage operation signal, when the cool storage temperature detected by the cool storage tank temperature sensor 43 becomes equal to or higher than the cool storage operation start temperature T8 ° C., the absorption cooler 21 supplies the coolant to the cool storage tank 32. To start cold storage operation. Further, the cold storage operation is stopped when the cold storage temperature detected by the cold storage tank temperature sensor 43 is equal to or lower than the cold storage operation end temperature T7 ° C. lower than the cold storage operation start temperature T8 ° C. For this reason, the cold storage operation is performed in a state where sufficient cold heat cannot be secured in the cold storage tank 32, and the cold storage operation is stopped when sufficient cold heat is secured in the cold storage tank 32, and wasteful cold storage operation is performed. Can be prevented.
  • the above-described temperatures T1 to T8 ° C. can be appropriately changed, and the heights between the temperatures T1 to T8 ° C. can be appropriately changed.
  • the normal cooling operation can be read as normal cooling operation.
  • the various terms described above can be appropriately replaced.
  • the cold storage operation signal is transmitted assuming that the predetermined condition is satisfied when the current day is the cold storage operation day or the cold storage operation time zone, but the predetermined condition is not limited to the above, and can be appropriately changed. is there.
  • a predetermined condition may be that the cold storage operation instruction of the system controller 44 has been pressed or the like, and other conditions may be set as the predetermined condition.
  • a heat collector that heats the heat medium with renewable energy that can be permanently used as exhaust heat from the equipment or as an energy source
  • a heating medium heated by the heat collector is introduced to heat the dilute solution in the regenerator (101), and the regenerator (101), condenser (102), evaporator ( 103), and an absorption refrigerator (21) that obtains a cooling liquid by a circulation cycle of the absorber (104);
  • Branch channels (34a to 34d) branched from the circulation channel (31);
  • a switching valve (33a) for switching the flow direction of the coolant flowing through the circulation channel (31) and flowing into the branch channel (34a, 34b);
  • a regenerator (32) that is provided on the branch flow path (34a, 34b) and stores the cold by introducing the coolant obtained by the absorption refrigerator (21);
  • the absorption refrigeration machine (21) receives the cold storage operation signal from the controller (44) more than the case of not receiving the cold storage operation signal from the controller (44).
  • a cold storage tank temperature sensor (43) for detecting the cold storage temperature of the cold storage tank (32) is further provided,
  • the absorption refrigerator (21) receives the cold storage operation signal and the cold storage temperature detected by the cold storage tank temperature sensor (43) is equal to or higher than a first predetermined value
  • the cold storage tank When the cold storage operation of introducing the coolant into (32) and storing the cold is started and the cold storage temperature detected by the cold storage tank temperature sensor (43) is equal to or lower than the second predetermined value lower than the first predetermined value, The absorption refrigeration system (1) according to [1], wherein the cold storage operation is stopped.
  • a heat collector that heats the heat medium with renewable energy that can be permanently used as an exhaust heat or energy source from the device;
  • a heating medium heated by the heat collector is introduced to heat the dilute solution in the regenerator (101), and the regenerator (101), condenser (102), evaporator ( 103), and an absorption refrigerator (21) that obtains a cooling liquid by a circulation cycle of the absorber (104);
  • Branch channels (34a, 34b) branched from the circulation channel (31);
  • a switching valve (33a) for switching the flow direction of the coolant flowing through the circulation channel (31) and flowing into the branch channel (34a, 34b);
  • a regenerator (32) that is provided on the branch flow path (34a, 34b) and stores the cold by introducing the coolant obtained by the absorption refrigerator (21);
  • the present invention it is possible to perform more efficient operation and to reduce the possibility of occurrence of condensation.
  • the present invention having this effect is useful for an absorption refrigeration system.

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  • Sorption Type Refrigeration Machines (AREA)

Abstract

An absorption-type refrigeration system (1) equipped with: a solar heat collector (11); an absorption-type refrigerator (21); a circulation circuit (31); branch flow paths (34a, 34b); a changeover valve (33a); a cold storage tanks (32); and a system controller (44) that transmits a cold storage operation signal to the absorption-type refrigerator (21) when a prescribed condition is satisfied, and stops transmitting the cold storage operation signal to the absorption-type refrigerator (21) when the prescribed condition is not satisfied. When the cold storage operation signal has been transmitted the system controller (44) controls the changeover valve (33a) and causes coolant from the absorption-type refrigerator (21) to flow into the branch flow paths (34a, 34b), and the absorption-type refrigerator (21) sets a lower target temperature for the coolant in a first circulation path (31a) when a cold storage operation signal is received from the system controller (44) than when a cold storage operation signal is not being received from the system controller (44).

Description

吸収式冷凍システムAbsorption refrigeration system
　本発明は、吸収式冷凍システムに関する。 The present invention relates to an absorption refrigeration system.
　従来、太陽光の受光によって熱媒を加熱する太陽熱集熱器と、太陽熱集熱器にて加熱された熱媒を導入して蓄熱する蓄熱槽と、を備えた太陽熱利用システムが提案されている。また、このような太陽熱利用システムにおいて、蓄熱槽と吸収式冷凍機との間を配管接続し、これらの間で熱媒を循環させることにより、吸収式冷凍機の再生器において希溶液の加熱に利用する吸収式冷凍システムについても提案されている（特許文献１参照）。 Conventionally, a solar heat utilization system including a solar heat collector that heats a heat medium by receiving sunlight and a heat storage tank that stores heat by introducing a heat medium heated by the solar heat collector has been proposed. . Also, in such a solar heat utilization system, piping connection between the heat storage tank and the absorption chiller, and circulating the heat medium between them, heating the dilute solution in the regenerator of the absorption chiller An absorption refrigeration system to be used has also been proposed (see Patent Document 1).
　この吸収式冷凍システムによれば、太陽熱という再生可能エネルギーを利用して希溶液を加熱することができ、希溶液の加熱に要する燃料費を削減することができる。さらに、太陽熱集熱器と吸収式冷凍機との間には蓄熱槽が介在することとなり、これがバッファの役目をするため、日射量に左右されることなく、蓄熱槽から比較的高温の熱媒を吸収式冷凍機に供給することができる。すなわち、日射量が小さい場合に、太陽熱集熱器から吸収式冷凍機に直接熱媒を供給すると、温度が低い熱媒が吸収式冷凍機に供給されることとなり、効率の良い運転を行うことができなくなってしまう。しかし、吸収式冷凍システムが蓄熱槽を備えることにより、温度の安定した熱媒を吸収式冷凍機に供給できるため、効率の良い運転を行うことができる。 According to this absorption refrigeration system, the dilute solution can be heated using renewable energy called solar heat, and the fuel cost required for heating the dilute solution can be reduced. Furthermore, a heat storage tank is interposed between the solar heat collector and the absorption refrigerator, and this acts as a buffer. Can be supplied to an absorption refrigerator. That is, when the amount of solar radiation is small, if a heat medium is supplied directly from the solar heat collector to the absorption refrigerator, the heat medium having a low temperature will be supplied to the absorption refrigerator, and efficient operation will be performed. Will not be able to. However, since the absorption refrigeration system includes the heat storage tank, a heat medium having a stable temperature can be supplied to the absorption refrigeration machine, so that an efficient operation can be performed.
日本国特開２０１２－１２７５７４号公報Japanese Unexamined Patent Publication No. 2012-127574
　上記のような吸収式冷凍システムでは、吸収式冷凍機が室内機と配管接続されており、室内機に冷却液が供給されるようになっている。ここで、吸収式冷凍機から室内機に向かう配管上に蓄冷を行う蓄冷槽を備え、例えば日射環境が良いときに吸収式冷凍機において蓄冷運転を行って蓄冷槽により蓄冷を行い、日射環境が悪いときなどに蓄冷槽にて蓄冷された冷熱を用いて冷房を行おうとした場合、以下の問題が発生する。 In the absorption refrigeration system as described above, the absorption chiller is connected to the indoor unit by piping so that the coolant is supplied to the indoor unit. Here, a cold storage tank for storing cold is provided on the pipe from the absorption chiller to the indoor unit.For example, when the solar radiation environment is good, the cold storage operation is performed in the absorption chiller and cold storage is performed by the cold storage tank. The following problems occur when trying to cool using cold energy stored in a cold storage tank when it is bad.
　まず、蓄冷槽の冷熱を用いて冷房を行う場合、蓄冷されてから冷熱が使用されるまでの間に蓄冷槽にて放熱してしまうことを考慮すると、蓄冷を行う際には通常の冷房時における冷却液の温度よりも低い温度にて蓄冷を行う必要がある。このため、吸収式冷凍機から室内機（蓄冷槽）に向かう配管における冷却液の目標温度を下げることとなる。しかし、冷却液の目標温度を下げてしまうと、通常の冷房時においては、必要以上に冷却液の温度が低くなってしまい、効率の良い運転を行っているとはいえない。 First, when performing cooling using the cold energy of the cold storage tank, considering that heat is radiated in the cold storage tank after the cold storage until the cold heat is used, when performing cold storage, during normal cooling It is necessary to perform cold storage at a temperature lower than the temperature of the coolant in For this reason, the target temperature of the coolant in the piping from the absorption refrigerator to the indoor unit (cold storage tank) is lowered. However, if the target temperature of the coolant is lowered, the temperature of the coolant becomes lower than necessary during normal cooling, and it cannot be said that an efficient operation is performed.
　さらに、必要以上に冷却液の温度が低くなってしまうと、室内機側において結露が発生することもある。 Furthermore, if the coolant temperature becomes lower than necessary, condensation may occur on the indoor unit side.
　なお、上記問題は、太陽熱により熱媒を加熱する方式に限らず、排熱を利用して熱媒を加熱して蓄熱するシステムや、地熱やバイオマスなどの再生可能エネルギーを利用して熱媒を加熱して蓄熱するシステムを有する吸収式冷凍システムにおいても共通する問題である。 Note that the above problem is not limited to the method of heating the heat medium by solar heat, but a system that heats the heat medium by using exhaust heat to store the heat medium, or by using renewable energy such as geothermal or biomass. This is a common problem even in an absorption refrigeration system having a system for storing heat by heating.
　さらに、上記問題は、室内機に接続される吸収式冷凍機を含む吸収式冷凍システムに限らず、工業用冷却装置等の他の外部機器と接続される吸収式冷凍機を含む吸収式冷凍システムにおいても共通する問題である。 Furthermore, the above problem is not limited to an absorption refrigeration system including an absorption chiller connected to an indoor unit, but an absorption refrigeration system including an absorption chiller connected to another external device such as an industrial cooling device. This is a common problem.
　本発明はこのような従来の課題を解決するためになされたものであり、その目的とするところは、より効率の良い運転を可能とすると共に結露が発生する可能性を低減することが可能な吸収式冷凍システムを提供することにある。 The present invention has been made to solve such a conventional problem, and the object of the present invention is to enable more efficient operation and reduce the possibility of condensation. The object is to provide an absorption refrigeration system.
　本発明の吸収式冷凍システムは、機器からの排熱又はエネルギー源として永続的に利用可能な再生可能エネルギーにより熱媒を加熱する集熱器と、前記集熱器にて加熱された熱媒を導入して再生器における希溶液を加熱し、当該再生器、凝縮器、蒸発器、及び吸収器の循環サイクルによって冷却液を得る吸収式冷凍機と、前記吸収式冷凍機にて得られた冷却液を前記吸収式冷凍機の前記蒸発器と外部機器との間で循環させる循環流路と、前記循環流路から分岐した分岐流路と、前記循環流路を流れる冷却液の流れ方向を切り替えて前記分岐流路に流入させる切替弁と、前記分岐流路上に設けられ、前記吸収式冷凍機にて得られた冷却液を導入して蓄冷する蓄冷槽と、所定条件が満たされた場合に、前記吸収式冷凍機に対して蓄冷運転信号を送信し、前記所定条件が満たされない場合に蓄冷運転信号の送信を禁止するコントローラと、を備え、前記コントローラは、前記蓄冷運転信号を送信した場合、前記切替弁を制御して前記吸収式冷凍機からの冷却液を前記分岐流路に流入させ、前記吸収式冷凍機は、前記コントローラから前記蓄冷運転信号を受信している場合、前記コントローラから前記蓄冷運転信号を受信していない場合よりも、前記吸収式冷凍機から前記外部機器に向かう流路における冷却液の目標温度を低下させることを特徴とする。 The absorption refrigeration system of the present invention comprises a heat collector that heats a heat medium with renewable energy that can be permanently used as an exhaust heat or energy source from equipment, and a heat medium that is heated by the heat collector. An absorption refrigerator that introduces and heats a dilute solution in a regenerator and obtains a cooling liquid by a circulation cycle of the regenerator, condenser, evaporator, and absorber, and cooling obtained by the absorption refrigerator The circulation flow path for circulating the liquid between the evaporator of the absorption refrigeration machine and the external device, the branch flow path branched from the circulation flow path, and the flow direction of the coolant flowing through the circulation flow path are switched. A switching valve that flows into the branch flow path, a cool storage tank that is provided on the branch flow path and stores the cold by introducing the coolant obtained by the absorption chiller, and when a predetermined condition is satisfied , A cold storage operation signal to the absorption refrigerator And a controller that prohibits transmission of a cold storage operation signal when the predetermined condition is not satisfied, and the controller controls the switching valve to transmit the cold storage operation signal when the cold storage operation signal is transmitted. From the controller, when the absorption refrigerator receives the cold storage operation signal from the controller, than when not receiving the cold storage operation signal from the controller, The target temperature of the coolant in the flow path from the absorption refrigerator to the external device is lowered.
　本発明の吸収式冷凍システムによれば、所定条件が満たされた場合に、吸収式冷凍機に対して蓄冷運転信号を送信し、所定条件が満たされない場合に蓄冷運転信号の送信を禁止し、コントローラから蓄冷運転信号を受信している場合、コントローラから蓄冷運転信号を受信していない場合よりも、吸収式冷凍機から外部機器に向かう流路における冷却液の目標温度を低下させる。このため、蓄冷運転を行う場合には、冷却液の目標温度を下げることができ、通常の冷房運転時において必要以上に冷却液の温度が低くなってしまい運転効率が悪化してしまうことを防止することができる。さらに、蓄冷運転を行う場合には冷却液の目標温度が下がることから、通常冷房時に必要以上に温度の低い冷却液が外部機器に供給されることなく、外部機器において結露が発生してしまう可能性を低減することとなる。従って、より効率の良い運転を可能とすると共に結露が発生する可能性を低減することが可能な吸収式冷凍システムを提供することができる。 According to the absorption refrigeration system of the present invention, when a predetermined condition is satisfied, a cold storage operation signal is transmitted to the absorption refrigerator, and when the predetermined condition is not satisfied, transmission of the cold storage operation signal is prohibited, When the cold storage operation signal is received from the controller, the target temperature of the coolant in the flow path from the absorption chiller to the external device is lowered than when the cold storage operation signal is not received from the controller. For this reason, when performing a cold storage operation, the target temperature of the coolant can be lowered, preventing the coolant temperature from becoming lower than necessary during normal cooling operation and deteriorating the operation efficiency. can do. Furthermore, when performing a cold storage operation, the target temperature of the coolant is lowered, so that the coolant having a temperature lower than necessary during normal cooling is not supplied to the external device, and condensation may occur in the external device. Will be reduced. Therefore, it is possible to provide an absorption refrigeration system that enables more efficient operation and can reduce the possibility of condensation.
　また、本発明の吸収式冷凍システムにおいて、前記蓄冷槽の蓄冷温度を検出する蓄冷槽温度センサをさらに備え、前記吸収式冷凍機は、前記蓄冷運転信号を受信している場合において、前記蓄冷槽温度センサにより検出された蓄冷温度が第１所定値以上となるときに、前記蓄冷槽に冷却液を導入して蓄冷する蓄冷運転を開始し、前記蓄冷槽温度センサにより検出された蓄冷温度が第１所定値よりも低い第２所定値以下となるときに、前記蓄冷運転を停止することが好ましい。 In the absorption refrigeration system of the present invention, the absorption refrigeration system further includes a cold storage tank temperature sensor that detects a cold storage temperature of the cold storage tank, and the absorption refrigerator is receiving the cold storage operation signal, the cold storage tank When the cold storage temperature detected by the temperature sensor is equal to or higher than the first predetermined value, a cold storage operation is started in which the cooling liquid is introduced into the cold storage tank for cold storage, and the cold storage temperature detected by the cold storage tank temperature sensor is It is preferable that the cold storage operation is stopped when the temperature is equal to or lower than a second predetermined value lower than the predetermined value.
　この吸収式冷凍システムによれば、吸収式冷凍機は、蓄冷運転信号を受信している場合において、蓄冷槽温度センサにより検出された蓄冷温度が第１所定値以上となるときに、蓄冷槽に冷却液を導入して蓄冷する蓄冷運転を開始する。また、蓄冷槽温度センサにより検出された蓄冷温度が第１所定値よりも低い第２所定値以下となるときに、蓄冷運転を停止する。このため、蓄冷槽において充分に冷熱を確保できていない状態において蓄冷運転が行われ、蓄冷槽において充分に冷熱を確保できている場合には蓄冷運転が停止することとなり、無駄な蓄冷運転を防止することができる。 According to this absorption refrigeration system, when the absorption chiller receives a cold storage operation signal, the absorption chiller is installed in the cold storage tank when the cold storage temperature detected by the cold storage tank temperature sensor is equal to or higher than the first predetermined value. The cold storage operation for introducing the coolant and storing the cold is started. Further, the cold storage operation is stopped when the cold storage temperature detected by the cold storage tank temperature sensor is equal to or lower than a second predetermined value lower than the first predetermined value. For this reason, the cold storage operation is performed in a state where sufficient cold heat cannot be secured in the cold storage tank, and the cold storage operation is stopped when sufficient cold heat is secured in the cold storage tank, preventing unnecessary cold storage operation. can do.
　また、本発明の吸収式冷凍システムの制御方法は、機器からの排熱又はエネルギー源として永続的に利用可能な再生可能エネルギーにより熱媒を加熱する集熱器と、前記集熱器にて加熱された熱媒を導入して再生器における希溶液を加熱し、当該再生器、凝縮器、蒸発器、及び吸収器の循環サイクルによって冷却液を得る吸収式冷凍機と、前記吸収式冷凍機にて得られた冷却液を前記吸収式冷凍機の前記蒸発器と外部機器との間で循環させる循環流路と、前記循環流路から分岐した分岐流路と、前記循環流路を流れる冷却液の流れ方向を切り替えて前記分岐流路に流入させる切替弁と、前記分岐流路上に設けられ、前記吸収式冷凍機にて得られた冷却液を導入して蓄冷する蓄冷槽と、前記吸収式冷凍機に対する蓄冷運転信号の送信、及び当該送信の禁止を行うコントローラと、を備えた吸収式冷凍システムの制御方法であって、所定条件が満たされた場合に、前記コントローラから前記吸収式冷凍機に対して蓄冷運転信号を送信する第１工程と、前記所定条件が満たされない場合に蓄冷運転信号の送信を禁止する第２工程と、前記第１工程にて蓄冷運転信号を送信した場合、前記切替弁を制御して前記吸収式冷凍機からの冷却液を前記分岐流路に流入させる第３工程と、前記第１工程にて前記コントローラから前記吸収式冷凍機に対して蓄冷運転信号が送信された場合、前記第２工程にて前記コントローラから前記吸収式冷凍機に対して蓄冷運転信号が送信されていない場合よりも、前記吸収式冷凍機から前記外部機器に向かう流路における冷却液の目標温度を低下させる第４工程と、を備えることを特徴とする。 Further, the control method of the absorption refrigeration system according to the present invention includes a heat collector that heats a heat medium by renewable energy that can be permanently used as an exhaust heat or energy source from the device, and a heating by the heat collector. An absorption refrigerator that heats the diluted solution in the regenerator by introducing the heated heat medium and obtains a cooling liquid by a circulation cycle of the regenerator, the condenser, the evaporator, and the absorber, and the absorption refrigerator A circulation flow path for circulating the obtained cooling liquid between the evaporator of the absorption chiller and an external device, a branch flow path branched from the circulation flow path, and a cooling liquid flowing through the circulation flow path A switching valve that switches the flow direction of the refrigerant to flow into the branch flow path, a regenerative tank that is provided on the branch flow path and that cools and stores the coolant obtained by the absorption chiller, and the absorption type Sending cool storage operation signal to refrigerator and And a controller that prohibits transmission. A first method of transmitting a cold storage operation signal from the controller to the absorption chiller when a predetermined condition is satisfied. And a second step for prohibiting transmission of a cold storage operation signal when the predetermined condition is not satisfied, and when the cold storage operation signal is transmitted in the first step, the absorption valve is controlled to control the switching valve. When the cool storage operation signal is transmitted from the controller to the absorption chiller in the first step, the third step of flowing the coolant from the flow into the branch flow path, the second step, A fourth process for lowering the target temperature of the coolant in the flow path from the absorption chiller to the external device, compared to a case where a cool storage operation signal is not transmitted from the controller to the absorption chiller. Characterized in that it comprises a and.
　この吸収式冷凍システムの制御方法によれば、所定条件が満たされた場合に、吸収式冷凍機に対して蓄冷運転信号を送信し、所定条件が満たされない場合に蓄冷運転信号の送信を禁止し、コントローラから蓄冷運転信号を受信している場合、コントローラから蓄冷運転信号を受信していない場合よりも、吸収式冷凍機から外部機器に向かう流路における冷却液の目標温度を低下させる。このため、蓄冷運転を行う場合には、冷却液の目標温度を下げることができ、通常の冷房運転時において必要以上に冷却液の温度が低くなってしまい運転効率が悪化してしまうことを防止することができる。さらに、蓄冷運転を行う場合には冷却液の目標温度が下がることから、通常冷房時に必要以上に温度の低い冷却液が外部機器に供給されることなく、外部機器において結露が発生してしまう可能性を低減することとなる。従って、より効率の良い運転を可能とすると共に結露が発生する可能性を低減することが可能な吸収式冷凍システムを提供することができる。 According to this control method for an absorption refrigeration system, when a predetermined condition is satisfied, a cold storage operation signal is transmitted to the absorption chiller, and when the predetermined condition is not satisfied, transmission of the cold storage operation signal is prohibited. When the cold storage operation signal is received from the controller, the target temperature of the coolant in the flow path from the absorption refrigerator to the external device is lowered as compared with the case where the cold storage operation signal is not received from the controller. For this reason, when performing a cold storage operation, the target temperature of the coolant can be lowered, preventing the coolant temperature from becoming lower than necessary during normal cooling operation and deteriorating the operation efficiency. can do. Furthermore, when performing a cold storage operation, the target temperature of the coolant is lowered, so that the coolant having a temperature lower than necessary during normal cooling is not supplied to the external device, and condensation may occur in the external device. Will be reduced. Therefore, it is possible to provide an absorption refrigeration system that enables more efficient operation and can reduce the possibility of condensation.
　本発明によれば、より効率の良い運転を可能とすると共に結露が発生する可能性を低減することが可能な吸収式冷凍システムを提供することができる。 According to the present invention, it is possible to provide an absorption refrigeration system that enables more efficient operation and can reduce the possibility of condensation.
図１は、本発明の実施形態に係る吸収式冷凍システムの概略構成図である。FIG. 1 is a schematic configuration diagram of an absorption refrigeration system according to an embodiment of the present invention. 図２は、吸収式冷凍機の一例を示す概略構成図である。FIG. 2 is a schematic configuration diagram illustrating an example of an absorption refrigerator. 図３は、本実施形態に係る集熱ポンプの制御を示す図である。FIG. 3 is a diagram illustrating control of the heat collection pump according to the present embodiment. 図４は、通常冷房運転時における吸収式冷凍機の動作を説明する図である。FIG. 4 is a diagram illustrating the operation of the absorption refrigerator during normal cooling operation. 図５は、蓄冷運転時における吸収式冷凍システムの動作を説明する図であり、（ａ）は吸収式冷凍機の動作を示し、（ｂ）はシステム全体の動作を示している。FIG. 5 is a diagram for explaining the operation of the absorption refrigeration system during the cold storage operation, where (a) shows the operation of the absorption chiller and (b) shows the operation of the entire system. 図６は、本実施形態に係る吸収式冷凍システムのシステムコントローラにおける処理を示すフローチャートであって、蓄冷運転信号の送信及び禁止の処理を示している。FIG. 6 is a flowchart showing processing in the system controller of the absorption refrigeration system according to the present embodiment, and shows processing for transmitting and prohibiting a cold storage operation signal. 図７は、本実施形態に係る吸収式冷凍システムのシステムコントローラにおける処理を示すフローチャートであって、切替弁の処理を示している。FIG. 7 is a flowchart showing processing in the system controller of the absorption refrigeration system according to the present embodiment, and shows processing of the switching valve.
　以下、本発明の好適な実施形態を図面に基づいて説明する。図１は、本発明の実施形態に係る吸収式冷凍システムの概略構成図である。図１に示すように、本実施形態に係る吸収式冷凍システム１は、太陽熱を利用して吸収式冷凍機２１の希溶液を加熱するものであって、第１システム１０と、第２システム２０と、第３システム３０とを備えている。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of an absorption refrigeration system according to an embodiment of the present invention. As shown in FIG. 1, an absorption refrigeration system 1 according to the present embodiment heats a diluted solution of an absorption refrigeration machine 21 using solar heat, and includes a first system 10 and a second system 20. And a third system 30.
　第１システム１０は、太陽熱を利用して熱媒を加熱するものであって、太陽熱集熱器（集熱器）１１と、蓄熱槽１２と、集熱流路１３と、集熱ポンプ１４とを備えている。なお、本実施形態において第１システム１０は、太陽熱を利用して熱媒を加熱するものであるが、これに限らず、排熱を利用して熱媒を加熱するものであってもよいし、地熱、バイオマス等の再生可能エネルギー（エネルギー源として永続的に利用可能なもの）を利用して熱媒を加熱するものであってもよい。 The first system 10 heats a heat medium using solar heat, and includes a solar heat collector (heat collector) 11, a heat storage tank 12, a heat collection channel 13, and a heat collection pump 14. I have. In the present embodiment, the first system 10 heats the heat medium using solar heat, but is not limited thereto, and may heat the heat medium using exhaust heat. Further, the heating medium may be heated using renewable energy (one that can be permanently used as an energy source) such as geothermal or biomass.
　太陽熱集熱器１１は、太陽光を受光することで熱媒を加熱するものであって、例えば屋根の上などの太陽光を受光し易い位置に設置されるものである。なお、熱媒は、水、不凍液、及びプロピレングリコール水溶液などが用いられる。 The solar heat collector 11 heats the heat medium by receiving sunlight, and is installed at a position where it is easy to receive sunlight, such as on a roof. As the heat medium, water, antifreeze, propylene glycol aqueous solution, or the like is used.
　蓄熱槽１２は、太陽熱集熱器１１にて加熱された熱媒を導入して蓄熱するものである。この蓄熱槽１２は、熱媒を内部に貯めるタンクであってもよいし、導入した熱媒の熱を蓄熱材により蓄熱するものであってもよい。 The heat storage tank 12 introduces a heat medium heated by the solar heat collector 11 and stores heat. The heat storage tank 12 may be a tank that stores the heat medium therein, or may be one that stores heat of the introduced heat medium using a heat storage material.
　なお、蓄熱槽１２が蓄熱材により蓄熱するものである場合、蓄熱材料は、例えば水酸化マグネシウムが用いられるが特にこれに限られるものではない。さらに、熱媒が水であり、蓄熱槽１２が水を内部に貯めるタンクである場合、蓄熱槽１２はいわゆる貯湯槽として機能し、家庭等に湯水が供給されるようになっていてもよい。加えて、蓄熱槽１２は熱交換機を備えるタイプのものであってもよい。 In addition, when the heat storage tank 12 stores heat with a heat storage material, for example, magnesium hydroxide is used as the heat storage material, but is not limited thereto. Furthermore, when the heat medium is water and the heat storage tank 12 is a tank that stores water therein, the heat storage tank 12 may function as a so-called hot water storage tank, and hot water may be supplied to a home or the like. In addition, the heat storage tank 12 may be of a type including a heat exchanger.
　集熱流路１３は、蓄熱槽１２から太陽熱集熱器１１を経て再度蓄熱槽１２に熱媒を循環させる配管である。このうち、蓄熱槽１２から太陽熱集熱器１１に向かう流路を第１集熱流路１３ａと称し、太陽熱集熱器１１から蓄熱槽１２に向かう流路を第２集熱流路１３ｂと称する。 The heat collection channel 13 is a pipe that circulates the heat medium from the heat storage tank 12 through the solar heat collector 11 to the heat storage tank 12 again. Among these, the flow path from the heat storage tank 12 to the solar heat collector 11 is referred to as a first heat collection flow path 13a, and the flow path from the solar heat collector 11 to the heat storage tank 12 is referred to as a second heat collection flow path 13b.
　集熱ポンプ１４は、集熱流路１３のうち第１集熱流路１３ａに設けられており、蓄熱槽１２から太陽熱集熱器１１を経て再度蓄熱槽１２に熱媒を循環させる動力源となるものである。 The heat collection pump 14 is provided in the first heat collection flow path 13a of the heat collection flow path 13, and serves as a power source for circulating the heat medium from the heat storage tank 12 through the solar heat collector 11 to the heat storage tank 12 again. It is.
　このような第１システム１０では、集熱ポンプ１４が動作することにより、集熱流路１３を熱媒が循環する。熱媒は太陽熱集熱器１１によって加熱され、第２集熱流路１３ｂを通じて蓄熱槽１２に至り、蓄熱槽１２において蓄熱されることとなる。 In such a first system 10, the heat medium circulates through the heat collecting flow path 13 by operating the heat collecting pump 14. The heat medium is heated by the solar heat collector 11, reaches the heat storage tank 12 through the second heat collection flow path 13 b, and is stored in the heat storage tank 12.
　第２システム２０は、蓄熱槽１２に貯められている熱媒や蓄熱材を介して昇温した熱媒を吸収式冷凍機２１に供給するものであって、吸収式冷凍機２１と、熱媒流路２２と、熱媒ポンプ２３とを備えている。 The second system 20 supplies a heat medium heated in a heat storage tank 12 and a heat medium heated through a heat storage material to the absorption refrigeration machine 21, and includes the absorption refrigeration machine 21 and the heat medium. A flow path 22 and a heat medium pump 23 are provided.
　吸収式冷凍機２１は、再生器における希溶液を加熱し、当該再生器、凝縮器、蒸発器、及び吸収器の循環サイクルによって冷却液を得るものである。 The absorption refrigerator 21 heats a dilute solution in a regenerator and obtains a cooling liquid by a circulation cycle of the regenerator, a condenser, an evaporator, and an absorber.
　図２は、吸収式冷凍機２１の一例を示す概略構成図である。具体的に、再生器１０１は、例えば冷媒となる水（以下、冷媒が蒸気化したものを冷媒蒸気と称し、冷媒が液化したものを液冷媒と称する）と、吸収液となる臭化リチウム（ＬｉＢｒ）とが混合された希溶液（吸収液の濃度が低い溶液）を加熱するものである。この再生器１０１には熱媒流路２２が配置されており、熱媒流路２２上に希溶液が散布され加熱される。再生器１０１は、この加熱により希溶液から蒸気を放出させることにより、冷媒蒸気と濃溶液（吸収液の濃度が高い溶液）とを生成する。 FIG. 2 is a schematic configuration diagram showing an example of the absorption refrigerator 21. Specifically, the regenerator 101 includes, for example, water serving as a refrigerant (hereinafter, the refrigerant vaporized is referred to as refrigerant vapor, and the refrigerant liquefied is referred to as liquid refrigerant), and lithium bromide (absorbent liquid) ( A dilute solution (solution having a low concentration of the absorbing solution) mixed with LiBr) is heated. The regenerator 101 is provided with a heat medium flow path 22, and a dilute solution is sprayed on the heat medium flow path 22 and heated. The regenerator 101 generates a refrigerant vapor and a concentrated solution (a solution having a high concentration of absorption liquid) by releasing the vapor from the dilute solution by this heating.
　凝縮器１０２は、再生器１０１から供給された冷媒蒸気を液化させるものである。この凝縮器１０２内には、第１冷水伝熱管１０２ａが挿通されている。第１冷水伝熱管１０２ａには冷却塔などから冷却水が供給されており、蒸発した冷媒蒸気は第１冷水伝熱管１０２ａ内の冷却水によって液化する。さらに、凝縮器１０２にて液化した液冷媒は蒸発器１０３に供給される。 The condenser 102 liquefies the refrigerant vapor supplied from the regenerator 101. A first cold water heat transfer tube 102a is inserted into the condenser 102. Cooling water is supplied to the first cold water heat transfer tube 102a from a cooling tower or the like, and the evaporated refrigerant vapor is liquefied by the cooling water in the first cold water heat transfer tube 102a. Further, the liquid refrigerant liquefied by the condenser 102 is supplied to the evaporator 103.
　蒸発器１０３は、液冷媒を蒸発させるものである。この蒸発器１０３内には、室内機（外部機器の一例）に接続される第２冷水伝熱管（循環流路）３１が設けられている。この第２冷水伝熱管３１は、例えば室内機と接続されており、室内機による冷却によって暖められた水が流れている。また、蒸発器１０３内は、真空状態となっている。このため、冷媒である水の蒸発温度は約５℃となる。よって、第２冷水伝熱管３１上に散布された液冷媒は第２冷水伝熱管３１の温度によって蒸発することとなる。また、第２冷水伝熱管３１内の水は、液冷媒の蒸発によって温度が奪われる。これにより、第２冷水伝熱管３１の水は冷水（冷却液の一例）として室内機に供給され、室内機は冷水を利用して冷風を室内に供給することとなる。 The evaporator 103 evaporates the liquid refrigerant. In this evaporator 103, the 2nd cold water heat exchanger tube (circulation flow path) 31 connected to an indoor unit (an example of an external device) is provided. The second cold water heat transfer tube 31 is connected to, for example, an indoor unit, and water warmed by cooling by the indoor unit flows. Further, the inside of the evaporator 103 is in a vacuum state. For this reason, the evaporation temperature of water as a refrigerant is about 5 ° C. Therefore, the liquid refrigerant sprayed on the second cold water heat transfer tube 31 evaporates depending on the temperature of the second cold water heat transfer tube 31. Further, the temperature of the water in the second cold water heat transfer tube 31 is deprived of the temperature by evaporation of the liquid refrigerant. Thereby, the water of the 2nd cold water heat exchanger tube 31 will be supplied to an indoor unit as cold water (an example of a cooling fluid), and an indoor unit will supply cold air indoors using cold water.
　吸収器１０４は、蒸発器１０３において蒸発した冷媒を吸収するものである。この吸収器１０４内には再生器１０１から濃溶液が供給され、蒸発した冷媒は濃溶液によって吸収され、希溶液が生成される。また、吸収器１０４には、第３冷水伝熱管１０４ａが挿通されている。第３冷水伝熱管１０４ａには冷却水が流れており、濃溶液の冷媒の吸収により生じる吸収熱は、第３冷水伝熱管１０４ａの冷却水により除去される。なお、この第３冷水伝熱管１０４ａは、第１冷水伝熱管１０２ａと接続されている。また、吸収器１０４は、冷媒の吸収により濃度が低下した希溶液をポンプ１０４ｂによって再生器１０１に供給する。 The absorber 104 absorbs the refrigerant evaporated in the evaporator 103. A concentrated solution is supplied from the regenerator 101 into the absorber 104, and the evaporated refrigerant is absorbed by the concentrated solution to generate a diluted solution. The absorber 104 is inserted with a third cold water heat transfer tube 104a. The cooling water flows through the third cold water heat transfer tube 104a, and the absorbed heat generated by the absorption of the refrigerant of the concentrated solution is removed by the cooling water of the third cold water heat transfer tube 104a. The third cold water heat transfer tube 104a is connected to the first cold water heat transfer tube 102a. Moreover, the absorber 104 supplies the regenerator 101 with the dilute solution whose density | concentration fell by absorption of the refrigerant | coolant by the pump 104b.
　なお、上記において第２冷水伝熱管３１は室内機に接続されているが、これ限らず、工業用の冷却装置等と接続されていてもよい。以下の説明では室内機を外部機器の一例として説明するものとする。 In addition, although the 2nd cold water heat exchanger tube 31 is connected to the indoor unit in the above, it is not restricted to this, You may connect with an industrial cooling device etc. In the following description, an indoor unit will be described as an example of an external device.
　さらに、吸収式冷凍機２１は、制御部１０５を備えている。この制御部１０５はＣＰＵ（Central Processing Unit）を備え、吸収式冷凍機２１の全体を制御するものである。また、この制御部１０５は、後述のシステムコントローラ４４からの信号に基づいて制御内容を変更する構成となっている。 Furthermore, the absorption chiller 21 includes a control unit 105. The control unit 105 includes a CPU (Central Processing Unit) and controls the entire absorption refrigerator 21. The control unit 105 is configured to change the control content based on a signal from a system controller 44 described later.
　再度図１を参照する。熱媒流路２２は、蓄熱槽１２から吸収式冷凍機２１の再生器１０１を経て再度蓄熱槽１２に熱媒を循環させる配管である。このうち、蓄熱槽１２から吸収式冷凍機２１の再生器１０１に向かう流路を第１熱媒流路２２ａと称し、吸収式冷凍機２１の再生器１０１から蓄熱槽１２に向かう流路を第２熱媒流路２２ｂと称する。 Refer to Fig. 1 again. The heat medium flow path 22 is a pipe that circulates the heat medium from the heat storage tank 12 through the regenerator 101 of the absorption refrigerator 21 to the heat storage tank 12 again. Among these, the flow path from the heat storage tank 12 to the regenerator 101 of the absorption chiller 21 is referred to as a first heat medium flow path 22a, and the flow path from the regenerator 101 of the absorption refrigeration machine 21 to the heat storage tank 12 is the first. This is referred to as two heat medium flow path 22b.
　熱媒ポンプ２３は、熱媒流路２２のうち第１熱媒流路２２ａに設けられており、蓄熱槽１２から吸収式冷凍機２１の再生器１０１を経て再度蓄熱槽１２に熱媒を循環させる動力源となるものである。 The heat medium pump 23 is provided in the first heat medium flow path 22 a of the heat medium flow path 22, and circulates the heat medium from the heat storage tank 12 to the heat storage tank 12 again through the regenerator 101 of the absorption refrigerator 21. It becomes a power source to be made.
　第３システム３０は、吸収式冷凍機２１にて得られた冷却液を室内機に送出したり、冷却液による蓄冷を行ったりする部位であって、上記した第２冷水伝熱管３１（以下循環流路３１という）に加えて、蓄冷槽３２、第１及び第２切替弁３３ａ，３３ｂ、第１～第４分岐流路３４ａ～３４ｄ、及び、循環ポンプ３５を備えている。 The third system 30 is a part that sends out the coolant obtained by the absorption refrigerator 21 to the indoor unit or performs cold storage using the coolant, and the second cold water heat transfer pipe 31 (hereinafter referred to as circulation). In addition to the flow path 31), a cold storage tank 32, first and second switching valves 33 a and 33 b, first to fourth branch flow paths 34 a to 34 d, and a circulation pump 35 are provided.
　上記した循環流路３１は、吸収式冷凍機２１にて得られた冷水を吸収式冷凍機２１の蒸発器１０３と室内機との間で循環させる流路である。この循環流路３１のうち、吸収式冷凍機２１から室内機に向かう流路を第１循環流路３１ａと称し、室内機から吸収式冷凍機２１に向かう流路を第２循環流路３１ｂと称する。 The above-described circulation flow path 31 is a flow path for circulating cold water obtained by the absorption chiller 21 between the evaporator 103 of the absorption chiller 21 and the indoor unit. Among the circulation channels 31, a channel from the absorption chiller 21 to the indoor unit is referred to as a first circulation channel 31a, and a channel from the indoor unit to the absorption chiller 21 is referred to as a second circulation channel 31b. Called.
　蓄冷槽３２は、循環流路３１のうち第１循環流路３１ａから分岐した流路（第１及び第２分岐流路３４ａ，３４ｂ）上に設けられ、吸収式冷凍機２１にて得られた冷水を導入して蓄冷するものである。 The cold storage tank 32 is provided on a flow path (first and second branch flow paths 34 a, 34 b) branched from the first circulation flow path 31 a among the circulation flow paths 31, and obtained by the absorption refrigerator 21. Cold water is introduced to store cold.
　この蓄冷槽３２は、冷水を内部に貯めるタンクであってもよいし、導入した冷水の冷熱を蓄冷材により蓄冷するものであってもよい。なお、蓄冷槽３２が蓄冷材により蓄冷するものである場合、蓄冷材料は、例えば水とゲル剤（天然高分子）との混合物が用いられるが特にこれに限られるものではない。加えて、蓄冷槽３２は熱交換機を備えるタイプのものであってもよい。 The cold storage tank 32 may be a tank that stores cold water therein, or may store cold heat of the introduced cold water using a cold storage material. In addition, when the cool storage tank 32 is what cools with a cool storage material, the cool storage material is, for example, a mixture of water and a gel agent (natural polymer), but is not particularly limited thereto. In addition, the cold storage tank 32 may be of a type including a heat exchanger.
　第１切替弁３３ａは、第１循環流路３１ａ上に設けられた三方弁であり、第１及び第２ポートＡ，Ｂが第１循環流路３１ａ上に位置するものである。第１分岐流路３４ａは、一端が第１切替弁３３ａの第３ポートＣに接続され、他端が蓄冷槽３２の入口に接続されている。このため、第１切替弁３３ａは、吸収式冷凍機２１からの冷水を室内機に供給するルート（Ａ－Ｂ）と蓄冷槽３２に供給するルート（Ａ－Ｃ）とを切り替えることとなる。 The first switching valve 33a is a three-way valve provided on the first circulation channel 31a, and the first and second ports A and B are located on the first circulation channel 31a. One end of the first branch channel 34 a is connected to the third port C of the first switching valve 33 a, and the other end is connected to the inlet of the regenerator 32. For this reason, the first switching valve 33a switches between a route (AB) for supplying cold water from the absorption refrigeration machine 21 to the indoor unit and a route (AC) for supplying the cold storage tank 32.
　第２切替弁３３ｂは、蓄冷槽３２の出口側に設けられた三方弁である。第２分岐流路３４ｂは、一端が蓄冷槽３２の出口に接続され、他端が第２切替弁３３ｂの第１ポートＤに接続されている。第３分岐流路３４ｃは、一端が第２切替弁３３ｂの第２ポートＥに接続され、他端が第２循環流路３１ｂに接続されている。第４分岐配管３４ｄは、一端が第２切替弁３３ｂの第３ポートＦに接続され、他端が第１循環流路３１ａの第１切替弁３３ａの下流側に接続されている。このため、第２切替弁３３ｂは、蓄冷槽３２からの冷水を第２循環流路３１ｂに戻すルート（Ｄ－Ｅ）と室内機に供給するルート（Ｄ－Ｆ）とを切り替えることとなる。 The second switching valve 33 b is a three-way valve provided on the outlet side of the cold storage tank 32. The second branch channel 34b has one end connected to the outlet of the regenerator 32 and the other end connected to the first port D of the second switching valve 33b. The third branch channel 34c has one end connected to the second port E of the second switching valve 33b and the other end connected to the second circulation channel 31b. The fourth branch pipe 34d has one end connected to the third port F of the second switching valve 33b and the other end connected to the downstream side of the first switching valve 33a of the first circulation channel 31a. For this reason, the second switching valve 33b switches between a route (DE) for returning the cold water from the cold storage tank 32 to the second circulation channel 31b and a route (DF) for supplying the indoor unit.
　循環ポンプ３５は、第２循環流路３１ｂのうち、第２循環流路３１ｂと第３分岐流路３４ｃとの接続点よりも下流側の位置に設けられ、吸収式冷凍機２１の蒸発器１０３から室内機を経て再度吸収式冷凍機２１の蒸発器１０３に冷水を循環させる動力源となるものである。また、この循環ポンプ３５は、第１及び第２切替弁３３ａ，３３ｂが制御されて、Ａ－Ｃルート及びＤ－Ｅルートが選択された場合、冷水を室内機に供給することなく、吸収式冷凍機２１と蓄冷槽３２とを介して冷水を循環させる動力源となる。 The circulation pump 35 is provided at a position downstream of the connection point between the second circulation channel 31 b and the third branch channel 34 c in the second circulation channel 31 b, and the evaporator 103 of the absorption chiller 21. To the power source for circulating cold water to the evaporator 103 of the absorption refrigerator 21 again through the indoor unit. In addition, when the first and second switching valves 33a and 33b are controlled and the AC route and the DE route are selected, the circulation pump 35 does not supply cold water to the indoor unit without absorbing the cold water. It becomes a power source for circulating cold water through the refrigerator 21 and the cold storage tank 32.
　さらに、本実施形態に係る吸収式冷凍システム１は、集熱器温度センサ４１と、蓄熱槽温度センサ４２と、蓄冷槽温度センサ４３と、システムコントローラ（コントローラ）４４とを備えている。 Furthermore, the absorption refrigeration system 1 according to this embodiment includes a heat collector temperature sensor 41, a heat storage tank temperature sensor 42, a cold storage tank temperature sensor 43, and a system controller (controller) 44.
　集熱器温度センサ４１は、太陽熱集熱器１１からの熱媒の温度を検出するものであって、熱媒温度に応じた信号をシステムコントローラ４４に送信するものである。蓄熱槽温度センサ４２は、蓄熱槽１２内の熱媒の温度（蓄熱温度）を検出するものであって、熱媒温度に応じた信号をシステムコントローラ４４に送信するものである。蓄冷槽温度センサ４３は、蓄冷槽３２の冷水の温度（蓄冷温度）を検出するものであって、冷水温度に応じた信号をシステムコントローラ４４に送信するものである。 The heat collector temperature sensor 41 detects the temperature of the heat medium from the solar heat collector 11 and transmits a signal corresponding to the heat medium temperature to the system controller 44. The heat storage tank temperature sensor 42 detects the temperature of the heat medium in the heat storage tank 12 (heat storage temperature), and transmits a signal corresponding to the heat medium temperature to the system controller 44. The cold storage tank temperature sensor 43 detects the temperature of the cold water in the cold storage tank 32 (cold storage temperature), and transmits a signal corresponding to the cold water temperature to the system controller 44.
　システムコントローラ４４は、ＣＰＵを備え、吸収式冷凍システム１の全体を制御するものである。特に、本実施形態に係るシステムコントローラ４４は、蓄冷運転信号を吸収式冷凍機２１の制御部１０５に対して送信し、又は送信を禁止する機能を有しており、吸収式冷凍機２１は、蓄冷運転信号を受信した場合、蓄冷運転信号を受信していない場合よりも、吸収式冷凍機２１から室内機に向かう流路（すなわち第１循環流路３１ａ）における冷却液の目標温度（以下出口目標温度）を低下させる。 The system controller 44 includes a CPU and controls the entire absorption refrigeration system 1. In particular, the system controller 44 according to the present embodiment has a function of transmitting a cold storage operation signal to the control unit 105 of the absorption chiller 21 or prohibiting the transmission. When the cold storage operation signal is received, the target temperature of the coolant (hereinafter referred to as the outlet) in the flow path from the absorption chiller 21 to the indoor unit (that is, the first circulation flow path 31a) is greater than when the cold storage operation signal is not received. Reduce target temperature.
　次に、本実施形態に係る吸収式冷凍システム１の制御方法を説明する。図３は、本実施形態に係る集熱ポンプ１４の制御を示す図である。 Next, a control method of the absorption refrigeration system 1 according to this embodiment will be described. FIG. 3 is a diagram illustrating control of the heat collecting pump 14 according to the present embodiment.
　まず、集熱ポンプ１４が停止しているものとする。この状態においてシステムコントローラ４４は、集熱器温度センサ４１からの信号を入力すると共に、蓄熱槽温度センサ４２からの信号を入力する。次いで、システムコントローラ４４は、これら信号に基づいて、差温を算出する。この差温は、集熱器温度センサ４１の検出温度から蓄熱槽温度センサ４２の検出温度を減算したものである。次いで、システムコントローラ４４は、差温が図３に示すＴ１℃以上であるか判断し、Ｔ１℃以上であると判断した場合、集熱ポンプ１４を動作させ（ＯＮ）、Ｔ１℃以上でないと判断した場合、集熱ポンプ１４を停止状態のままとする（ＯＦＦ）。 First, it is assumed that the heat collection pump 14 is stopped. In this state, the system controller 44 inputs a signal from the heat collector temperature sensor 41 and a signal from the heat storage tank temperature sensor 42. Next, the system controller 44 calculates a differential temperature based on these signals. This differential temperature is obtained by subtracting the temperature detected by the heat storage tank temperature sensor 42 from the temperature detected by the heat collector temperature sensor 41. Next, the system controller 44 determines whether or not the temperature difference is equal to or higher than T1 ° C. shown in FIG. 3. When it is determined that the temperature difference is equal to or higher than T1 ° C., the system controller 44 operates the heat collecting pump 14 (ON). In this case, the heat collecting pump 14 is kept stopped (OFF).
　集熱ポンプ１４の動作後、システムコントローラ４４は、集熱器温度センサ４１及び蓄熱槽温度センサ４２からの信号を入力し、差温を算出する。そして、システムコントローラ４４は、差温が図３に示すＴ２℃以下であるかを判断する。システムコントローラ４４は、Ｔ２℃以下であると判断した場合、集熱ポンプ１４を停止させ（ＯＦＦ）、Ｔ２℃以下でないと判断した場合、集熱ポンプ１４を動作状態のままとする（ＯＮ）。 After the operation of the heat collection pump 14, the system controller 44 inputs signals from the heat collector temperature sensor 41 and the heat storage tank temperature sensor 42, and calculates a differential temperature. Then, the system controller 44 determines whether the temperature difference is equal to or lower than T2 ° C. shown in FIG. When the system controller 44 determines that the temperature is equal to or lower than T2 ° C., the system controller 44 stops the heat collecting pump 14 (OFF). When the system controller 44 determines that the temperature is not lower than T2 ° C., the system controller 44 keeps the heat collecting pump 14 in an operating state (ON).
　なお、上記差温については、移動平均等の値を採用してもよい。 In addition, about the said differential temperature, you may employ | adopt values, such as a moving average.
　また、吸収式冷凍機２１は、通常冷房運転と、蓄冷運転とを行うようになっている。通常冷房運転と蓄冷運転とが行われている場合、すなわち、吸収式冷凍機２１が停止していない場合に、システムコントローラ４４は、熱媒ポンプ２３を動作させ、蓄熱槽１２からの熱媒を吸収式冷凍機２１の再生器１０１に供給する。これにより、蓄熱槽１２からの熱媒が再生器１０１における希溶液の加熱に用いられることとなる。 Moreover, the absorption refrigerator 21 performs a normal cooling operation and a cold storage operation. When the normal cooling operation and the cold storage operation are performed, that is, when the absorption refrigeration machine 21 is not stopped, the system controller 44 operates the heat medium pump 23 to transfer the heat medium from the heat storage tank 12. The refrigerating machine 101 of the absorption refrigerator 21 is supplied. Thereby, the heat medium from the heat storage tank 12 is used for heating the dilute solution in the regenerator 101.
　また、通常冷房運転時において吸収式冷凍システム１は以下のように動作する。図４は、通常冷房運転時における吸収式冷凍機２１の動作を説明する図である。図４に示すように、吸収式冷凍機２１の制御部１０５には、通常冷房運転時における温調停止温度Ｔ３℃と温調開始温度Ｔ４℃とが記憶されている。また、第３システム３０は、吸収式冷凍機２１から室内機に向かう流路における冷却液の温度（以下出口温度という）を検出する温度センサ（不図示）を備えており、制御部１０５は、この温度センサからの信号に基づいて吸収式冷凍機２１を制御する。 Also, during normal cooling operation, the absorption refrigeration system 1 operates as follows. FIG. 4 is a diagram for explaining the operation of the absorption refrigerator 21 during the normal cooling operation. As shown in FIG. 4, the control unit 105 of the absorption refrigerator 21 stores a temperature adjustment stop temperature T3 ° C. and a temperature adjustment start temperature T4 ° C. during normal cooling operation. Further, the third system 30 includes a temperature sensor (not shown) that detects the temperature of the coolant in the flow path from the absorption chiller 21 to the indoor unit (hereinafter referred to as outlet temperature). The absorption refrigerator 21 is controlled based on the signal from the temperature sensor.
　すなわち、制御部１０５は、吸収式冷凍機２１の通常冷房運転中において温度センサにより検出される出口温度が温調停止温度Ｔ３℃以下になると、その運転を一時停止させる。また、制御部１０５は、一時停止中において出口温度が温調開始温度Ｔ４℃以上となると、その運転を再開する。なお、一時停止中において循環ポンプ３５は動作しており、冷水は循環させられている。 That is, when the outlet temperature detected by the temperature sensor during the normal cooling operation of the absorption chiller 21 becomes equal to or lower than the temperature adjustment stop temperature T3 ° C., the control unit 105 temporarily stops the operation. Further, the control unit 105 resumes the operation when the outlet temperature becomes equal to or higher than the temperature adjustment start temperature T4 ° C. during the temporary stop. During the temporary stop, the circulation pump 35 is operating and the cold water is circulated.
　また、蓄冷運転時において吸収式冷凍システム１は以下のように動作する。図５は、蓄冷運転時における吸収式冷凍システム１の動作を説明する図であり、（ａ）は吸収式冷凍機２１の動作を示し、（ｂ）はシステム１全体の動作を示している。図５（ａ）に示すように、吸収式冷凍機２１の制御部１０５には、蓄冷運転時における温調停止温度Ｔ５℃と温調開始温度Ｔ６℃とが記憶されている。ここで、蓄冷運転時における温調停止温度Ｔ５℃は、通常冷房運転時における温調停止温度Ｔ３℃よりも低く、蓄冷運転時における温調開始温度Ｔ６℃は、通常冷房運転時における温調開始温度Ｔ４℃よりも低い。 Also, during the cold storage operation, the absorption refrigeration system 1 operates as follows. FIG. 5 is a diagram for explaining the operation of the absorption refrigeration system 1 during the cold storage operation, where (a) shows the operation of the absorption refrigeration machine 21 and (b) shows the operation of the entire system 1. As shown in FIG. 5A, the control unit 105 of the absorption refrigerator 21 stores a temperature adjustment stop temperature T5 ° C. and a temperature adjustment start temperature T6 ° C. during the cold storage operation. Here, the temperature adjustment stop temperature T5 ° C. during the cold storage operation is lower than the temperature adjustment stop temperature T3 ° C. during the normal cooling operation, and the temperature adjustment start temperature T6 ° C. during the cold storage operation is the temperature adjustment start during the normal cooling operation. The temperature is lower than T4 ° C.
　制御部１０５は、吸収式冷凍機２１の蓄冷運転中において温度センサにより検出される出口温度が温調停止温度Ｔ５℃以下になると、その運転を一時停止させる。また、制御部１０５は、一時停止中において出口温度が温調開始温度Ｔ６℃以上となると、その運転を再開する。なお、一時停止中において循環ポンプ３５は動作しており、冷水は循環させられている。 When the outlet temperature detected by the temperature sensor during the cold storage operation of the absorption refrigerator 21 is equal to or lower than the temperature control stop temperature T5 ° C., the control unit 105 temporarily stops the operation. In addition, when the outlet temperature becomes equal to or higher than the temperature adjustment start temperature T6 ° C. during the temporary stop, the control unit 105 resumes the operation. During the temporary stop, the circulation pump 35 is operating and the cold water is circulated.
　さらに、システムコントローラ４４は、図５（ｂ）に示す蓄冷運転終了温度Ｔ７℃（第２所定値）と蓄冷運転開始温度Ｔ８℃（第１所定値）とを記憶している。ここで、蓄冷運転終了温度Ｔ７℃は、蓄冷運転時における温調停止温度Ｔ５℃よりも高い。また、蓄冷運転開始温度Ｔ８℃は、蓄冷運転時における温調開始温度Ｔ６℃と同じであり、通常冷房運転時における温調開始温度Ｔ４℃よりも低い。 Furthermore, the system controller 44 stores a cold storage operation end temperature T7 ° C. (second predetermined value) and a cold storage operation start temperature T8 ° C. (first predetermined value) shown in FIG. Here, the cool storage operation end temperature T7 ° C is higher than the temperature control stop temperature T5 ° C during the cool storage operation. The cold storage operation start temperature T8 ° C. is the same as the temperature adjustment start temperature T6 ° C. during the cold storage operation, and is lower than the temperature control start temperature T4 ° C. during the normal cooling operation.
　システムコントローラ４４は、蓄冷運転中において蓄冷槽温度センサ４３により検出される蓄冷温度が蓄冷運転終了温度Ｔ７℃以下になると、システム１の全体（集熱ポンプ１４の動作を除く）を停止させる。すなわち、熱媒ポンプ２３及び循環ポンプ３５は動作を停止し、吸収式冷凍機２１においては循環サイクルによる冷水の生成が停止することとなる。 The system controller 44 stops the entire system 1 (excluding the operation of the heat collecting pump 14) when the cold storage temperature detected by the cold storage tank temperature sensor 43 during the cold storage operation becomes equal to or lower than the cold storage operation end temperature T7 ° C. That is, the operation of the heat medium pump 23 and the circulation pump 35 stops, and the absorption refrigerator 21 stops the production of cold water by the circulation cycle.
　また、システムコントローラ４４は、システム全体の停止中において蓄冷槽温度センサ４３により検出される蓄冷温度が蓄冷運転開始温度Ｔ８℃以上となると、システム全体の運転を開始させる。すなわち、熱媒ポンプ２３及び循環ポンプ３５は動作を開始し、吸収式冷凍機２１においては循環サイクルにより冷水が得られることとなる。 Further, the system controller 44 starts the operation of the entire system when the cold storage temperature detected by the cold storage tank temperature sensor 43 becomes equal to or higher than the cold storage operation start temperature T8 ° C. while the entire system is stopped. That is, the heat medium pump 23 and the circulation pump 35 start operation, and in the absorption refrigerator 21, cold water is obtained by the circulation cycle.
　さらに、システムコントローラ４４は、蓄冷運転を行うかを判断し、行うと判断した場合、蓄冷運転信号を吸収式冷凍機２１の制御部１０５に出力する。吸収式冷凍機２１の制御部１０５は、蓄冷運転信号を受信すると、制御内容を図４に示すものから図５（ａ）に示すものに移行させることとなる。すなわち、制御部１０５は、蓄冷運転信号を受信した場合、蓄冷運転信号を受信していない場合よりも、出口目標温度を低下させることとなる。 Furthermore, the system controller 44 determines whether or not to perform a cold storage operation, and outputs a cold storage operation signal to the control unit 105 of the absorption chiller 21 when it is determined to perform the cold storage operation. When receiving the cold storage operation signal, the control unit 105 of the absorption refrigerator 21 shifts the control content from the one shown in FIG. 4 to the one shown in FIG. That is, when the control unit 105 receives the cold storage operation signal, the control unit 105 lowers the target outlet temperature than when the cold storage operation signal is not received.
　なお、蓄冷運転信号の送信の可否は、システムコントローラ４４内のタイマが参照され、蓄冷運転日や蓄冷運転時間帯（所定条件の一例）であれば蓄冷運転信号が送信され、通常空調日や通常空調時間帯であれば蓄冷運転信号の送信が禁止される。 Whether or not the cool storage operation signal can be transmitted is referred to a timer in the system controller 44, and if the cool storage operation date or the cool storage operation time zone (an example of a predetermined condition), the cool storage operation signal is transmitted and the normal air conditioning day or normal Transmission of the cold storage operation signal is prohibited during the air conditioning time period.
　加えて、システムコントローラ４４は、第１及び第２切替弁３３ａ，３３ｂの制御も実行する。すなわち、システムコントローラ４４は、通常冷房運転時において第１切替弁３３ａを制御してＡ－Ｂルートを選択すると共に、第２切替弁３３ｂを制御してＤ－Ｅルートを選択する。また、システムコントローラ４４は、蓄冷運転時において第１切替弁３３ａを制御してＡ－Ｃルートを選択すると共に、第２切替弁３３ｂを制御してＤ－Ｅルートを選択する。 In addition, the system controller 44 also executes control of the first and second switching valves 33a and 33b. That is, the system controller 44 controls the first switching valve 33a to select the AB route and controls the second switching valve 33b to select the DE route during normal cooling operation. Further, the system controller 44 controls the first switching valve 33a to select the AC route during the cold storage operation, and controls the second switching valve 33b to select the DE route.
　さらに、室内機は蓄冷槽３２から供給される冷水によっても冷房運転可能である。このため、蓄冷槽３２内の冷水を使用して冷房運転を行う場合、システムコントローラ４４は、第１切替弁３３ａを制御してＡ－Ｃルートを選択すると共に、第２切替弁３３ｂを制御してＤ－Ｆルートを選択する。 Furthermore, the indoor unit can also be cooled by cold water supplied from the cold storage tank 32. Therefore, when the cooling operation is performed using the cold water in the cold storage tank 32, the system controller 44 controls the first switching valve 33a to select the AC route and also controls the second switching valve 33b. To select the DF route.
　図６は、本実施形態に係る吸収式冷凍システム１のシステムコントローラ４４における処理を示すフローチャートであって、蓄冷運転信号の送信及び禁止の処理を示している。なお、図６に示す処理はシステム１全体が停止するまで実行される。 FIG. 6 is a flowchart showing processing in the system controller 44 of the absorption refrigeration system 1 according to the present embodiment, and shows processing for transmitting and prohibiting a cold storage operation signal. 6 is executed until the entire system 1 is stopped.
　まず、システムコントローラ４４は、タイマ判断を行う（Ｓ１）。タイマ判断の結果、現在が蓄冷運転日又は蓄冷運転時間帯（所定条件の一例）である場合（Ｓ１：蓄冷運転日又は蓄冷運転時間帯）、システムコントローラ４４は、蓄冷運転信号を吸収式冷凍機２１に送信し（Ｓ２）、その後図６に示す処理はステップＳ１に移行する。 First, the system controller 44 makes a timer determination (S1). As a result of the timer determination, when the current time is the cold storage operation day or the cold storage operation time zone (an example of the predetermined condition) (S1: the cold storage operation date or the cold storage operation time zone), the system controller 44 absorbs the cold storage operation signal. 21 (S2), and then the processing shown in FIG. 6 proceeds to step S1.
　一方、タイマ判断の結果、現在が通常空調日又は通常空調時間帯である場合（Ｓ１：通常空調日又は通常空調時間帯）、システムコントローラ４４は、現在空調負荷があるか、すなわちユーザより冷房運転の指令があったかを判断する（Ｓ３）。現在空調負荷がない場合（Ｓ３：ＮＯ）、システムコントローラ４４は、蓄冷運転信号を吸収式冷凍機２１に送信し（Ｓ２）、その後図６に示す処理はステップＳ１に移行する。 On the other hand, if the result of the timer determination indicates that the current time is a normal air conditioning day or a normal air conditioning time zone (S1: normal air conditioning date or normal air conditioning time zone), the system controller 44 has a current air conditioning load, that is, a cooling operation from the user. Is judged (S3). If there is currently no air conditioning load (S3: NO), the system controller 44 transmits a cold storage operation signal to the absorption chiller 21 (S2), and then the processing shown in FIG. 6 proceeds to step S1.
　現在空調負荷がある場合（Ｓ３：ＹＥＳ）、システムコントローラ４４は、蓄冷運転信号の送信を禁止し（Ｓ４）、その後図６に示す処理はステップＳ１に移行する。 If there is a current air conditioning load (S3: YES), the system controller 44 prohibits transmission of the cold storage operation signal (S4), and then the processing shown in FIG. 6 proceeds to step S1.
　図７は、本実施形態に係る吸収式冷凍システム１のシステムコントローラ４４における処理を示すフローチャートであって、切替弁３３ａ，３３ｂの処理を示している。なお、図７に示す処理はシステム１全体が停止するまで実行される。 FIG. 7 is a flowchart showing processing in the system controller 44 of the absorption refrigeration system 1 according to this embodiment, and shows processing of the switching valves 33a and 33b. 7 is executed until the entire system 1 is stopped.
　まず、システムコントローラ４４は、蓄冷運転時であるかを判断する（Ｓ１１）。蓄冷運転時であるか否かは、図６のステップＳ２において蓄冷運転信号を送信したか否かに基づいて判断してもよいし、図６のステップＳ１のようにタイマ判断と同様に判断してもよい。 First, the system controller 44 determines whether it is during a cold storage operation (S11). Whether or not it is during the cold storage operation may be determined based on whether or not the cold storage operation signal is transmitted in step S2 of FIG. 6, or may be determined in the same manner as the timer determination as in step S1 of FIG. May be.
　蓄冷運転時であると判断した場合（Ｓ１１：ＹＥＳ）、システムコントローラ４４は、第１切替弁３３ａを制御してＡ－Ｃルートを選択すると共に、第２切替弁３３ｂを制御してＤ－Ｅルートを選択する（Ｓ１２）。すなわち、上記ルートを選択することにより、システムコントローラ４４は、冷水を室内機に供給することなく、吸収式冷凍機２１と蓄冷槽３２との間で循環させることとなる。そして、図７に示す処理はステップＳ１１に移行する。 When it is determined that the cold storage operation is being performed (S11: YES), the system controller 44 controls the first switching valve 33a to select the AC route, and controls the second switching valve 33b to control DE. A route is selected (S12). That is, by selecting the above route, the system controller 44 circulates between the absorption chiller 21 and the cold storage tank 32 without supplying cold water to the indoor unit. Then, the processing shown in FIG. 7 proceeds to step S11.
　なお、この場合において吸収式冷凍機２１の制御部１０５は、図４及び図５（ａ）に示すように、出口目標温度を低下させる。 In this case, the control unit 105 of the absorption chiller 21 decreases the target outlet temperature as shown in FIGS. 4 and 5A.
　一方、蓄冷運転時でないと判断した場合（Ｓ１１：ＮＯ）、システムコントローラ４４は、通常冷房運転時であるかを判断する（Ｓ１３）。この場合、システムコントローラ４４は、例えば蓄冷槽温度センサ４３からの信号に基づき、蓄冷槽３２の蓄冷温度が所定温度を超える場合に、通常冷房運転時であると判断し（Ｓ１３：ＹＥＳ）、そうでない場合に通常冷房運転時でないと判断する（Ｓ１３：ＮＯ）。 On the other hand, when it is determined that it is not during cold storage operation (S11: NO), the system controller 44 determines whether it is during normal cooling operation (S13). In this case, for example, based on a signal from the cold storage tank temperature sensor 43, the system controller 44 determines that the normal cooling operation is being performed when the cold storage temperature of the cold storage tank 32 exceeds a predetermined temperature (S13: YES). If not, it is determined that it is not during normal cooling operation (S13: NO).
　そして、通常冷房運転時であると判断した場合（Ｓ１３：ＹＥＳ）、システムコントローラ４４は、第１切替弁３３ａを制御してＡ－Ｂルートを選択すると共に、第２切替弁３３ｂを制御してＤ－Ｅルートを選択する（Ｓ１４）。すなわち、上記ルートを選択することにより、システムコントローラ４４は、冷水を蓄冷槽３２に供給することなく、吸収式冷凍機２１と室内機との間で循環させることとなる。そして、図７に示す処理はステップＳ１１に移行する。 If it is determined that the cooling operation is normal (S13: YES), the system controller 44 controls the first switching valve 33a to select the AB route and also controls the second switching valve 33b. The DE route is selected (S14). That is, by selecting the above route, the system controller 44 circulates between the absorption refrigerator 21 and the indoor unit without supplying cold water to the cold storage tank 32. Then, the processing shown in FIG. 7 proceeds to step S11.
　通常冷房運転時でないと判断した場合（Ｓ１３：ＮＯ）、システムコントローラ４４は、蓄冷槽３２内の冷水を使用して冷房運転を行うかを判断する（Ｓ１５）。この場合、システムコントローラ４４は、例えば蓄冷槽温度センサ４３からの信号に基づき、蓄冷槽３２の蓄冷温度が所定温度以下である場合に、蓄冷槽３２内の冷水を使用した冷房を行うと判断し（Ｓ１５：ＹＥＳ）、そうでない場合に蓄冷槽３２内の冷水を使用した冷房を行わないと判断する（Ｓ１５：ＮＯ）。 When it is determined that it is not during normal cooling operation (S13: NO), the system controller 44 determines whether to perform cooling operation using the cold water in the cold storage tank 32 (S15). In this case, for example, based on a signal from the cold storage tank temperature sensor 43, the system controller 44 determines that the cooling using the cold water in the cold storage tank 32 is performed when the cold storage temperature of the cold storage tank 32 is equal to or lower than a predetermined temperature. (S15: YES), otherwise, it is determined not to perform cooling using the cold water in the cold storage tank 32 (S15: NO).
　そして、蓄冷槽３２内の冷水を使用した冷房を行うと判断した場合（Ｓ１５：ＹＥＳ）、システムコントローラ４４は、第１切替弁３３ａを制御してＡ－Ｃルートを選択すると共に、第２切替弁３３ｂを制御してＤ－Ｆルートを選択する（Ｓ１６）。すなわち、上記ルートを選択することにより、システムコントローラ４４は、蓄冷槽３２を介したうえで、吸収式冷凍機２１と室内機との間で冷水を循環させることとなる。そして、図７に示す処理は終了する。 When it is determined that the cooling using the cold water in the regenerator 32 is performed (S15: YES), the system controller 44 controls the first switching valve 33a to select the AC route and the second switching. The valve 33b is controlled to select the DF route (S16). That is, by selecting the above route, the system controller 44 circulates cold water between the absorption chiller 21 and the indoor unit through the cold storage tank 32. Then, the process shown in FIG. 7 ends.
　一方、蓄冷槽３２内の冷水を使用した冷房を行わないと判断した場合（Ｓ１５：ＮＯ）、処理はステップＳ１１に移行することとなる。 On the other hand, when it is determined not to perform cooling using the cold water in the cold storage tank 32 (S15: NO), the process proceeds to step S11.
　このようにして、本実施形態に係る吸収式冷凍システム１によれば、所定条件が満たされた場合に、吸収式冷凍機２１に対して蓄冷運転信号を送信し、所定条件が満たされない場合に蓄冷運転信号の送信を禁止し、システムコントローラ４４から蓄冷運転信号を受信している場合、システムコントローラ４４から蓄冷運転信号を受信していない場合よりも、吸収式冷凍機２１から室内機に向かう第１循環流路３１ａにおける冷却液の目標温度を低下させる。このため、蓄冷運転を行う場合には、冷却液の目標温度を下げることができ、通常の冷房運転時において必要以上に冷却液の温度が低くなってしまい運転効率が悪化してしまうことを防止することができる。さらに、蓄冷運転を行う場合には冷却液の目標温度が下がることから、通常冷房時に必要以上に温度の低い冷却液が室内機に供給されることなく、室内機において結露が発生してしまう可能性を低減することとなる。従って、より効率の良い運転を可能とすると共に結露が発生する可能性を低減することが可能な吸収式冷凍システム１を提供することができる。 Thus, according to the absorption refrigeration system 1 according to the present embodiment, when a predetermined condition is satisfied, a cold storage operation signal is transmitted to the absorption refrigeration machine 21, and when the predetermined condition is not satisfied. In the case where the transmission of the cold storage operation signal is prohibited and the cold storage operation signal is received from the system controller 44, the absorption refrigerator 21 is directed to the indoor unit more than the case where the cold storage operation signal is not received from the system controller 44. The target temperature of the coolant in the 1 circulation channel 31a is lowered. For this reason, when performing a cold storage operation, the target temperature of the coolant can be lowered, preventing the coolant temperature from becoming lower than necessary during normal cooling operation and deteriorating the operation efficiency. can do. Furthermore, when performing the cold storage operation, the target temperature of the cooling liquid is lowered, so that the cooling liquid having a temperature lower than necessary during normal cooling is not supplied to the indoor unit, and condensation may occur in the indoor unit. Will be reduced. Therefore, it is possible to provide the absorption refrigeration system 1 that enables more efficient operation and can reduce the possibility of condensation.
　また、吸収式冷凍機２１は、蓄冷運転信号を受信している場合において、蓄冷槽温度センサ４３により検出された蓄冷温度が蓄冷運転開始温度Ｔ８℃以上となるときに、蓄冷槽３２に冷却液を導入して蓄冷する蓄冷運転を開始する。また、蓄冷槽温度センサ４３により検出された蓄冷温度が蓄冷運転開始温度Ｔ８℃よりも低い蓄冷運転終了温度Ｔ７℃以下となるときに、蓄冷運転を停止する。このため、蓄冷槽３２において充分に冷熱を確保できていない状態において蓄冷運転が行われ、蓄冷槽３２において充分に冷熱を確保できている場合には蓄冷運転が停止することとなり、無駄な蓄冷運転を防止することができる。 Moreover, when the absorption refrigerator 21 is receiving the cool storage operation signal, when the cool storage temperature detected by the cool storage tank temperature sensor 43 becomes equal to or higher than the cool storage operation start temperature T8 ° C., the absorption cooler 21 supplies the coolant to the cool storage tank 32. To start cold storage operation. Further, the cold storage operation is stopped when the cold storage temperature detected by the cold storage tank temperature sensor 43 is equal to or lower than the cold storage operation end temperature T7 ° C. lower than the cold storage operation start temperature T8 ° C. For this reason, the cold storage operation is performed in a state where sufficient cold heat cannot be secured in the cold storage tank 32, and the cold storage operation is stopped when sufficient cold heat is secured in the cold storage tank 32, and wasteful cold storage operation is performed. Can be prevented.
　以上、実施形態に基づき本発明を説明したが、本発明は上記実施形態に限られるものではなく、本発明の趣旨を逸脱しない範囲で、変更を加えてもよい。 As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to the said embodiment, You may add in the range which does not deviate from the meaning of this invention.
　例えば上記した温度Ｔ１～Ｔ８℃については適宜変更可能であり、各温度Ｔ１～Ｔ８℃間の高低についても適宜変更可能である。また、外部機器が室内機でなく、工業用の冷却装置である場合には、通常冷房運転とは通常冷却運転等に読み替えられることは言うまでもない。さらに、外部機器が室内機及び工業用冷却装置を除く他の機器である場合においても、上記した各種文言は適宜読み替えられる。 For example, the above-described temperatures T1 to T8 ° C. can be appropriately changed, and the heights between the temperatures T1 to T8 ° C. can be appropriately changed. Needless to say, when the external device is not an indoor unit but an industrial cooling device, the normal cooling operation can be read as normal cooling operation. Furthermore, even when the external device is another device other than the indoor unit and the industrial cooling device, the various terms described above can be appropriately replaced.
　さらに、上記実施形態では、現在が蓄冷運転日又は蓄冷運転時間帯である場合に所定条件が満たされたとし蓄冷運転信号を送信しているが、所定条件は上記に限らず、適宜変更可能である。例えばシステムコントローラ４４の蓄冷運転ボタンが押下されるなどして、蓄冷運転の指示があったことを所定条件としてもよいし、他の条件を所定条件としてもよい。 Further, in the above embodiment, the cold storage operation signal is transmitted assuming that the predetermined condition is satisfied when the current day is the cold storage operation day or the cold storage operation time zone, but the predetermined condition is not limited to the above, and can be appropriately changed. is there. For example, a predetermined condition may be that the cold storage operation instruction of the system controller 44 has been pressed or the like, and other conditions may be set as the predetermined condition.
　ここで、上述した本発明に係る吸収式冷凍システム及び吸収式冷凍システムの制御方法の実施形態の特徴をそれぞれ以下［１］～［３］に簡潔に纏めて列記する。 Here, the features of the embodiment of the absorption refrigeration system and the control method of the absorption refrigeration system according to the present invention described above are briefly summarized and listed in the following [1] to [3], respectively.
　[１]　機器からの排熱又はエネルギー源として永続的に利用可能な再生可能エネルギーにより熱媒を加熱する集熱器（太陽熱集熱器１１）と、
　前記集熱器（太陽熱集熱器１１）にて加熱された熱媒を導入して再生器（１０１）における希溶液を加熱し、当該再生器（１０１）、凝縮器（１０２）、蒸発器（１０３）、及び吸収器（１０４）の循環サイクルによって冷却液を得る吸収式冷凍機（２１）と、
　前記吸収式冷凍機（２１）にて得られた冷却液を前記吸収式冷凍機（２１）の前記蒸発器（１０３）と外部機器との間で循環させる循環流路（３１）と、
　前記循環流路（３１）から分岐した分岐流路（３４ａ～３４ｄ）と、
　前記循環流路（３１）を流れる冷却液の流れ方向を切り替えて前記分岐流路（３４ａ，３４ｂ）に流入させる切替弁（３３ａ）と、
　前記分岐流路（３４ａ，３４ｂ）上に設けられ、前記吸収式冷凍機（２１）にて得られた冷却液を導入して蓄冷する蓄冷槽（３２）と、
　所定条件が満たされた場合に、前記吸収式冷凍機（２１）に対して蓄冷運転信号を送信し、前記所定条件が満たされない場合に蓄冷運転信号の送信を禁止するコントローラ（４４）と、を備え、
　前記コントローラ（４４）は、前記蓄冷運転信号を送信した場合、前記切替弁（３３ａ）を制御して前記吸収式冷凍機（２１）からの冷却液を前記分岐流路（３４ａ～３４ｄ）に流入させ、
　前記吸収式冷凍機（２１）は、前記コントローラ（４４）から前記蓄冷運転信号を受信している場合、前記コントローラ（４４）から前記蓄冷運転信号を受信していない場合よりも、前記吸収式冷凍機（２１）から前記外部機器に向かう流路における冷却液の目標温度を低下させる
　吸収式冷凍システム（１）。
　［２］　前記蓄冷槽（３２）の蓄冷温度を検出する蓄冷槽温度センサ（４３）をさらに備え、
　前記吸収式冷凍機（２１）は、前記蓄冷運転信号を受信している場合において、前記蓄冷槽温度センサ（４３）により検出された蓄冷温度が第１所定値以上となるときに、前記蓄冷槽（３２）に冷却液を導入して蓄冷する蓄冷運転を開始し、前記蓄冷槽温度センサ（４３）により検出された蓄冷温度が第１所定値よりも低い第２所定値以下となるときに、前記蓄冷運転を停止する
　上記［１］に記載の吸収式冷凍システム（１）。
　［３］　機器からの排熱又はエネルギー源として永続的に利用可能な再生可能エネルギーにより熱媒を加熱する集熱器（太陽熱集熱器１１）と、
　前記集熱器（太陽熱集熱器１１）にて加熱された熱媒を導入して再生器（１０１）における希溶液を加熱し、当該再生器（１０１）、凝縮器（１０２）、蒸発器（１０３）、及び吸収器（１０４）の循環サイクルによって冷却液を得る吸収式冷凍機（２１）と、
　前記吸収式冷凍機（２１）にて得られた冷却液を前記吸収式冷凍機（２１）の前記蒸発器（１０３）と外部機器との間で循環させる循環流路（３１）と、
　前記循環流路（３１）から分岐した分岐流路（３４ａ，３４ｂ）と、
　前記循環流路（３１）を流れる冷却液の流れ方向を切り替えて前記分岐流路（３４ａ，３４ｂ）に流入させる切替弁（３３ａ）と、
　前記分岐流路（３４ａ，３４ｂ）上に設けられ、前記吸収式冷凍機（２１）にて得られた冷却液を導入して蓄冷する蓄冷槽（３２）と、
　前記吸収式冷凍機（２１）に対する蓄冷運転信号の送信、及び当該送信の禁止を行うコントローラ（４４）と、
　を備えた吸収式冷凍システム（１）の制御方法であって、
　所定条件が満たされた場合に、前記コントローラ（４４）から前記吸収式冷凍機（２１）に対して蓄冷運転信号を送信する第１工程と、
　前記所定条件が満たされない場合に蓄冷運転信号の送信を禁止する第２工程と、
　前記第１工程にて蓄冷運転信号を送信した場合、前記切替弁（３３ａ）を制御して前記吸収式冷凍機（２１）からの冷却液を前記分岐流路（３４ａ，３４ｂ）に流入させる第３工程と、
　前記第１工程にて前記コントローラ（４４）から前記吸収式冷凍機（２１）に対して蓄冷運転信号が送信された場合、前記第２工程にて前記コントローラ（４４）から前記吸収式冷凍機（２１）に対して蓄冷運転信号が送信されていない場合よりも、前記吸収式冷凍機（２１）から前記外部機器に向かう流路における冷却液の目標温度を低下させる第４工程と、
　を備える吸収式冷凍システム（１）の制御方法。 [1] A heat collector (solar heat collector 11) that heats the heat medium with renewable energy that can be permanently used as exhaust heat from the equipment or as an energy source;
A heating medium heated by the heat collector (solar heat collector 11) is introduced to heat the dilute solution in the regenerator (101), and the regenerator (101), condenser (102), evaporator ( 103), and an absorption refrigerator (21) that obtains a cooling liquid by a circulation cycle of the absorber (104);
A circulation channel (31) for circulating the coolant obtained in the absorption refrigerator (21) between the evaporator (103) of the absorption refrigerator (21) and an external device;
Branch channels (34a to 34d) branched from the circulation channel (31);
A switching valve (33a) for switching the flow direction of the coolant flowing through the circulation channel (31) and flowing into the branch channel (34a, 34b);
A regenerator (32) that is provided on the branch flow path (34a, 34b) and stores the cold by introducing the coolant obtained by the absorption refrigerator (21);
A controller (44) that transmits a cold storage operation signal to the absorption refrigerator (21) when a predetermined condition is satisfied, and prohibits transmission of the cold storage operation signal when the predetermined condition is not satisfied; Prepared,
When the controller (44) transmits the cold storage operation signal, the controller (44) controls the switching valve (33a) to flow the coolant from the absorption chiller (21) into the branch flow paths (34a to 34d). Let
The absorption refrigeration machine (21) receives the cold storage operation signal from the controller (44) more than the case of not receiving the cold storage operation signal from the controller (44). An absorption refrigeration system (1) for lowering the target temperature of the coolant in the flow path from the machine (21) to the external device.
[2] A cold storage tank temperature sensor (43) for detecting the cold storage temperature of the cold storage tank (32) is further provided,
When the absorption refrigerator (21) receives the cold storage operation signal and the cold storage temperature detected by the cold storage tank temperature sensor (43) is equal to or higher than a first predetermined value, the cold storage tank When the cold storage operation of introducing the coolant into (32) and storing the cold is started and the cold storage temperature detected by the cold storage tank temperature sensor (43) is equal to or lower than the second predetermined value lower than the first predetermined value, The absorption refrigeration system (1) according to [1], wherein the cold storage operation is stopped.
[3] A heat collector (solar heat collector 11) that heats the heat medium with renewable energy that can be permanently used as an exhaust heat or energy source from the device;
A heating medium heated by the heat collector (solar heat collector 11) is introduced to heat the dilute solution in the regenerator (101), and the regenerator (101), condenser (102), evaporator ( 103), and an absorption refrigerator (21) that obtains a cooling liquid by a circulation cycle of the absorber (104);
A circulation channel (31) for circulating the coolant obtained in the absorption refrigerator (21) between the evaporator (103) of the absorption refrigerator (21) and an external device;
Branch channels (34a, 34b) branched from the circulation channel (31);
A switching valve (33a) for switching the flow direction of the coolant flowing through the circulation channel (31) and flowing into the branch channel (34a, 34b);
A regenerator (32) that is provided on the branch flow path (34a, 34b) and stores the cold by introducing the coolant obtained by the absorption refrigerator (21);
A controller (44) for transmitting a cold storage operation signal to the absorption refrigerator (21) and prohibiting the transmission;
A method for controlling an absorption refrigeration system (1) comprising:
A first step of transmitting a cold storage operation signal from the controller (44) to the absorption chiller (21) when a predetermined condition is satisfied;
A second step of prohibiting transmission of a cold storage operation signal when the predetermined condition is not satisfied;
When the cool storage operation signal is transmitted in the first step, the switching valve (33a) is controlled to allow the coolant from the absorption chiller (21) to flow into the branch flow paths (34a, 34b). 3 steps,
When a cool storage operation signal is transmitted from the controller (44) to the absorption refrigerator (21) in the first step, the absorption refrigerator ( A fourth step of lowering the target temperature of the coolant in the flow path from the absorption chiller (21) to the external device, compared to a case where a cold storage operation signal is not transmitted to 21);
A control method for an absorption refrigeration system (1).
　本発明を詳細にまた特定の実施態様を参照して説明したが、本発明の精神と範囲を逸脱することなく様々な変更や修正を加えることができることは当業者にとって明らかである。 Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
　本出願は、2013年10月23日出願の日本特許出願（特願2013－219906）に基づくものであり、その内容はここに参照として取り込まれる。 This application is based on a Japanese patent application filed on October 23, 2013 (Japanese Patent Application No. 2013-219906), the contents of which are incorporated herein by reference.
　本発明によれば、より効率の良い運転を可能とすると共に結露が発生する可能性を低減することができるという効果を奏する。この効果を奏する本発明は、吸収式冷凍システムに関して有用である。 According to the present invention, it is possible to perform more efficient operation and to reduce the possibility of occurrence of condensation. The present invention having this effect is useful for an absorption refrigeration system.
１　吸収式冷凍システム
１０　第１システム
１１　太陽熱集熱器（集熱器）
１２　蓄熱槽
１３　集熱流路
１４　集熱ポンプ
２０　第２システム
２１　吸収式冷凍機
２２　熱媒流路
２３　熱媒ポンプ
３０　第３システム
３１　循環流路
３２　蓄冷槽
３３ａ，３３ｂ　切替弁
３４ａ～３４ｄ　分岐流路
３５　循環ポンプ
４１　集熱器温度センサ
４２　蓄熱槽温度センサ
４３　蓄冷槽温度センサ
４４　システムコントローラ（コントローラ） DESCRIPTION OF SYMBOLS 1 Absorption-type refrigeration system 10 1st system 11 Solar collector (heat collector)
12 heat storage tank 13 heat collecting flow path 14 heat collecting pump 20 second system 21 absorption refrigerator 22 heat medium flow path 23 heat medium pump 30 third system 31 circulation flow path 32 cold storage tanks 33a, 33b switching valves 34a to 34d branch flow Path 35 Circulation pump 41 Heat collector temperature sensor 42 Heat storage tank temperature sensor 43 Cold storage tank temperature sensor 44 System controller (controller)

Claims (3)

  1. 　機器からの排熱又はエネルギー源として永続的に利用可能な再生可能エネルギーにより熱媒を加熱する集熱器と、
    　前記集熱器にて加熱された熱媒を導入して再生器における希溶液を加熱し、当該再生器、凝縮器、蒸発器、及び吸収器の循環サイクルによって冷却液を得る吸収式冷凍機と、
    　前記吸収式冷凍機にて得られた冷却液を前記吸収式冷凍機の前記蒸発器と外部機器との間で循環させる循環流路と、
    　前記循環流路から分岐した分岐流路と、
    　前記循環流路を流れる冷却液の流れ方向を切り替えて前記分岐流路に流入させる切替弁と、
    　前記分岐流路上に設けられ、前記吸収式冷凍機にて得られた冷却液を導入して蓄冷する蓄冷槽と、
    　所定条件が満たされた場合に、前記吸収式冷凍機に対して蓄冷運転信号を送信し、前記所定条件が満たされない場合に蓄冷運転信号の送信を禁止するコントローラと、を備え、
    　前記コントローラは、前記蓄冷運転信号を送信した場合、前記切替弁を制御して前記吸収式冷凍機からの冷却液を前記分岐流路に流入させ、
    　前記吸収式冷凍機は、前記コントローラから前記蓄冷運転信号を受信している場合、前記コントローラから前記蓄冷運転信号を受信していない場合よりも、前記吸収式冷凍機から前記外部機器に向かう流路における冷却液の目標温度を低下させる
    　吸収式冷凍システム。     A heat collector that heats the heat medium with renewable energy that is permanently available as waste heat or energy source from the equipment;
    An absorption refrigerator that introduces a heat medium heated by the heat collector and heats a dilute solution in the regenerator, and obtains a cooling liquid by a circulation cycle of the regenerator, the condenser, the evaporator, and the absorber; ,
    A circulation passage for circulating the coolant obtained by the absorption refrigerator between the evaporator of the absorption refrigerator and an external device;
    A branch channel branched from the circulation channel;
    A switching valve for switching the flow direction of the coolant flowing through the circulation flow path to flow into the branch flow path;
    A cold storage tank that is provided on the branch flow path and cools by introducing a cooling liquid obtained by the absorption refrigerator;
    A controller that transmits a cold storage operation signal to the absorption refrigerator when the predetermined condition is satisfied, and a controller that prohibits transmission of the cold storage operation signal when the predetermined condition is not satisfied,
    When the controller transmits the cold storage operation signal, the controller controls the switching valve to flow the coolant from the absorption chiller into the branch flow path,
    When the absorption refrigerator is receiving the cold storage operation signal from the controller, the flow path from the absorption refrigerator to the external device is greater than when the cold storage operation signal is not received from the controller. Absorption refrigeration system to lower the target temperature of coolant in
  2. 　前記蓄冷槽の蓄冷温度を検出する蓄冷槽温度センサをさらに備え、
    　前記吸収式冷凍機は、前記蓄冷運転信号を受信している場合において、前記蓄冷槽温度センサにより検出された蓄冷温度が第１所定値以上となるときに、前記蓄冷槽に冷却液を導入して蓄冷する蓄冷運転を開始し、前記蓄冷槽温度センサにより検出された蓄冷温度が第１所定値よりも低い第２所定値以下となるときに、前記蓄冷運転を停止する
    　請求項１に記載の吸収式冷凍システム。     A cold storage tank temperature sensor for detecting the cold storage temperature of the cold storage tank;
    In the case where the absorption refrigerator receives the cold storage operation signal, the absorption refrigerator introduces coolant into the cold storage tank when the cold storage temperature detected by the cold storage tank temperature sensor is equal to or higher than a first predetermined value. The cold storage operation is started, and the cold storage operation is stopped when the cold storage temperature detected by the cold storage tank temperature sensor is equal to or lower than a second predetermined value lower than the first predetermined value. Absorption refrigeration system.
  3. 　機器からの排熱又はエネルギー源として永続的に利用可能な再生可能エネルギーにより熱媒を加熱する集熱器と、
    　前記集熱器にて加熱された熱媒を導入して再生器における希溶液を加熱し、当該再生器、凝縮器、蒸発器、及び吸収器の循環サイクルによって冷却液を得る吸収式冷凍機と、
    　前記吸収式冷凍機にて得られた冷却液を前記吸収式冷凍機の前記蒸発器と外部機器との間で循環させる循環流路と、
    　前記循環流路から分岐した分岐流路と、
    　前記循環流路を流れる冷却液の流れ方向を切り替えて前記分岐流路に流入させる切替弁と、
    　前記分岐流路上に設けられ、前記吸収式冷凍機にて得られた冷却液を導入して蓄冷する蓄冷槽と、
    　前記吸収式冷凍機に対する蓄冷運転信号の送信、及び当該送信の禁止を行うコントローラと、
    　を備えた吸収式冷凍システムの制御方法であって、
    　所定条件が満たされた場合に、前記コントローラから前記吸収式冷凍機に対して蓄冷運転信号を送信する第１工程と、
    　前記所定条件が満たされない場合に蓄冷運転信号の送信を禁止する第２工程と、
    　前記第１工程にて蓄冷運転信号を送信した場合、前記切替弁を制御して前記吸収式冷凍機からの冷却液を前記分岐流路に流入させる第３工程と、
    　前記第１工程にて前記コントローラから前記吸収式冷凍機に対して蓄冷運転信号が送信された場合、前記第２工程にて前記コントローラから前記吸収式冷凍機に対して蓄冷運転信号が送信されていない場合よりも、前記吸収式冷凍機から前記外部機器に向かう流路における冷却液の目標温度を低下させる第４工程と、
    　を備える吸収式冷凍システムの制御方法。     A heat collector that heats the heat medium with renewable energy that is permanently available as waste heat or energy source from the equipment;
    An absorption refrigerator that introduces a heat medium heated by the heat collector and heats a dilute solution in the regenerator, and obtains a cooling liquid by a circulation cycle of the regenerator, the condenser, the evaporator, and the absorber; ,
    A circulation passage for circulating the coolant obtained by the absorption refrigerator between the evaporator of the absorption refrigerator and an external device;
    A branch channel branched from the circulation channel;
    A switching valve for switching the flow direction of the coolant flowing through the circulation flow path to flow into the branch flow path;
    A cold storage tank that is provided on the branch flow path and cools by introducing a cooling liquid obtained by the absorption refrigerator;
    A controller for transmitting a cold storage operation signal to the absorption refrigerator and prohibiting the transmission;
    An absorption refrigeration system control method comprising:
    A first step of transmitting a cold storage operation signal from the controller to the absorption chiller when a predetermined condition is satisfied;
    A second step of prohibiting transmission of a cold storage operation signal when the predetermined condition is not satisfied;
    When the cold storage operation signal is transmitted in the first step, the third step of controlling the switching valve to flow the coolant from the absorption refrigerator into the branch channel;
    When a cool storage operation signal is transmitted from the controller to the absorption refrigerator in the first step, a cool storage operation signal is transmitted from the controller to the absorption refrigerator in the second step. The fourth step of lowering the target temperature of the coolant in the flow path from the absorption refrigerator to the external device than when there is no;
    An absorption refrigeration system control method comprising:
PCT/JP2014/078256 2013-10-23 2014-10-23 Absorption-type refrigeration system WO2015060404A1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109883079A (en) * 2019-03-18 2019-06-14 华南理工大学 A kind of absorption compression interactive recooling composite refrigeration system and method
FR3082608A1 (en) * 2018-06-19 2019-12-20 Commissariat A L'energie Atomique Et Aux Energies Alternatives SYSTEM COMPRISING AN ABSORPTION MACHINE FOR THE PRODUCTION OF COLD FROM THE FATAL HEAT OF EXHAUST GAS OF A VEHICLE COMPRISING A THERMAL ENERGY STORAGE MODULE
FR3082609A1 (en) * 2018-06-19 2019-12-20 Commissariat A L'energie Atomique Et Aux Energies Alternatives SYSTEM COMPRISING AN ABSORPTION MACHINE FOR THE PRODUCTION OF COLD FROM THE FATAL HEAT OF EXHAUST GAS OF A VEHICLE COMPRISING A THERMAL ENERGY STORAGE MODULE
CN113669946A (en) * 2021-08-12 2021-11-19 上海碳索能源服务股份有限公司 Absorption type cold-heat combined supply system for hot filling workshop

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106642816A (en) * 2017-01-06 2017-05-10 华北电力大学 Heating and cooling combined system for solving renewable energy power generation energy waste problem
CN106766429B (en) * 2017-03-09 2024-05-03 贵州电网有限责任公司电力科学研究院 Heat pump frosting prevention solution regenerating device
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CN111486616B (en) * 2020-05-18 2024-12-06 中国能源建设集团陕西省电力设计院有限公司 A multi-energy complementary power generation and heating and cooling comprehensive utilization system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08100959A (en) * 1994-09-30 1996-04-16 Toshiba Corp Air conditioner
JPH11304260A (en) * 1998-04-23 1999-11-05 Mitsubishi Cable Ind Ltd Cold storage cooling system
JP2012127574A (en) * 2010-12-15 2012-07-05 Hitachi Plant Technologies Ltd Solar heat utilization system and its control method
JP2012242074A (en) * 2011-05-24 2012-12-10 Mitsubishi Electric Corp Refrigerator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4958178B2 (en) * 2008-07-03 2012-06-20 東京瓦斯株式会社 Air conditioning system
CN201412989Y (en) * 2009-06-05 2010-02-24 陕西理工学院 Solar Phase Change Heat Storage Absorption Refrigeration Device
CN103017397B (en) * 2012-12-18 2015-02-11 中国科学院电工研究所 Medium-high temperature solar steam-absorption refrigeration-seawater desalination-energy storage coupling system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08100959A (en) * 1994-09-30 1996-04-16 Toshiba Corp Air conditioner
JPH11304260A (en) * 1998-04-23 1999-11-05 Mitsubishi Cable Ind Ltd Cold storage cooling system
JP2012127574A (en) * 2010-12-15 2012-07-05 Hitachi Plant Technologies Ltd Solar heat utilization system and its control method
JP2012242074A (en) * 2011-05-24 2012-12-10 Mitsubishi Electric Corp Refrigerator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3082608A1 (en) * 2018-06-19 2019-12-20 Commissariat A L'energie Atomique Et Aux Energies Alternatives SYSTEM COMPRISING AN ABSORPTION MACHINE FOR THE PRODUCTION OF COLD FROM THE FATAL HEAT OF EXHAUST GAS OF A VEHICLE COMPRISING A THERMAL ENERGY STORAGE MODULE
FR3082609A1 (en) * 2018-06-19 2019-12-20 Commissariat A L'energie Atomique Et Aux Energies Alternatives SYSTEM COMPRISING AN ABSORPTION MACHINE FOR THE PRODUCTION OF COLD FROM THE FATAL HEAT OF EXHAUST GAS OF A VEHICLE COMPRISING A THERMAL ENERGY STORAGE MODULE
EP3584517A1 (en) * 2018-06-19 2019-12-25 Commissariat à l'Energie Atomique et aux Energies Alternatives System comprising an absorption machine for refrigeration from the free heat of exhaust gases of a vehicle comprising a module for storing thermal energy
EP3584518A1 (en) * 2018-06-19 2019-12-25 Commissariat à l'Energie Atomique et aux Energies Alternatives System comprising an absorption machine for refrigeration from the free heat of exhaust gases of a vehicle comprising a module for storing thermal energy
CN109883079A (en) * 2019-03-18 2019-06-14 华南理工大学 A kind of absorption compression interactive recooling composite refrigeration system and method
CN109883079B (en) * 2019-03-18 2023-05-23 华南理工大学 Absorption compression interactive recooling compound refrigeration system and method
CN113669946A (en) * 2021-08-12 2021-11-19 上海碳索能源服务股份有限公司 Absorption type cold-heat combined supply system for hot filling workshop

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CN105683684A (en) 2016-06-15

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