JP6425750B2 - Air conditioning system - Google Patents

Description

  The present invention relates to an air conditioning system.

  An air conditioning system that uses circulating water for heat exchange as air conditioning energy adjusts the air supply temperature of air conditioning air with a heat source unit that adjusts the temperature of the circulating water and a heat exchanger through which the circulating water flows, It consists of an air conditioner that performs air conditioning, and a water circulation device that circulates circulating water to the air conditioner and a heat source device. The circulating water which is absorbed or released from the air conditioning air by the heat exchanger of the air conditioner and deviates from the set water temperature is adjusted to the set water temperature by cooling or heating with the heat source unit. And the energy saving of a heat source machine is aimed at by the central control system which fluctuates the supply water temperature of a heat source machine according to the air-conditioning load of air conditioned space.

JP, 2016-85013, A

  In such a central control system, sensors for measuring the air conditioning load of the air conditioned space, and communication equipment between the control device of the heat source machine and the control device of the air conditioner are required, and the control becomes complicated. Equipment costs will increase. In addition, the air conditioner mixes outside air and return air, and then performs cooling, dehumidification, heating, etc. with a heat exchanger. In this type of air conditioner, for example, in the case of cooling operation in summer, humidity control of the air supply can not be performed unless reheating is performed after the cooling dehumidification. Therefore, in addition to the need for reheating energy, a four-tube type facility for simultaneously flowing cold water and warm water is required, and the facility cost and the operation cost become high. In addition, when the cooling operation is required even in the winter season, a four-pipe type of equipment is required, and there is a problem that equipment cost and operation cost become high.

  In order to solve the above problems, the present invention provides an air conditioner for supplying air conditioning air to an air conditioned space to cool or heat, and an air conditioner suitable for the cooling or heating by controlling the air conditioner. An air conditioner controller that adjusts to a state, a heat source machine that adjusts the supply water temperature of circulating water supplied to the air conditioner to adjust the air state of the air conditioning air, and control independent of the air conditioner controller The apparatus is characterized in that it comprises a heat source controller that automatically and variably adjusts the temperature of the supplied water of the circulating water according to the change in the load of the outside air.

  According to the first aspect of the present invention, the air conditioning load of the air conditioned space fluctuates in proportion to the outdoor temperature and humidity which is the external air load, so it is predicted that the air conditioning load of the air conditioned space is small if the external air load is small. it can. If the supply water temperature of circulating water to the air conditioner is raised in summer and lowered in winter using this, the energy consumption of the heat source machine can be reduced and energy saving can be achieved. Since the control is completely separated and independent between the air conditioner side and the heat source side without using a complicated and costly central control system, instrumentation work is simplified and maintenance management becomes easy.

Also, if outside air, which is air conditioning air, is cooled and dehumidified by the first heat exchanger, and return air, which is air conditioning air, is cooled without being dehumidified by the second heat exchanger, external air load (latent heat) with a two-pipe system And the indoor load (sensible heat) is treated separately to obtain the reheating effect, and the reheating energy component is energy saving. Because it is a two-pipe type, heat source equipment and piping equipment for circulating water are simplified to save energy and cost. Since the second treatment of the second heat exchanger is performed with the circulating water after the first treatment of the first heat exchanger to widen the water temperature difference of the circulating water, the operation efficiency of the heat source machine is improved and energy saving is achieved. The air conditioning system can be simplified and the cost can be reduced by minimizing the length of the pipe that constitutes the first water channel and the bypass water channel, and the number of the first water amount adjusting valve and the second water amount adjusting valve. The air conditioning load is adjusted to an air state suitable for cooling or heating by setting the operation to perform both the first process and the second process if the air conditioning load of the air conditioned space is large and setting the operation to perform only the first process if small. Control range is extended. Therefore, stable air conditioning can be performed on the air conditioned space even if the air conditioning load of the air conditioned space and the external air load become unbalanced and the energy supply from the heat source machine to the air conditioner is excessive or insufficient.

According to the invention of claim 2 , when the water temperature difference of the circulating water generated by the heat exchange by the air conditioner goes out of the preset water temperature difference range, the energy of the circulating water to be supplied to the air conditioner is excessive or insufficient. It will be. If it exceeds the preset water temperature difference range by using it, increase the water speed of circulating water, and if it does not meet the water temperature difference range, reduce the water speed of circulating water, and the excess or deficiency of heat source machine output Make up for Even if the control is completely separated and independent between the air conditioner side and the heat source side, the energy supply from the heat source machine to the air conditioner is stable, and comfort can be maintained and energy saving can be achieved.

According to the invention of claim 3 , since the air conditioning air supplied to the air conditioner is pre-cooled or preheated by utilizing the exhaust heat of the air conditioned space, the air conditioning load processed by the air conditioner is reduced and energy saving is realized. Energy efficiency is high and energy saving is achieved because the external air conditioner is a heat pump type.

According to the invention of claim 4 , since the two vaporization type humidifiers perform the humidification, the humidification does not become insufficient and a comfortable environment is obtained. Energy can be saved because cooling is performed using the evaporative cooling of the two evaporative humidifiers without increasing the amount of circulating water.

According to the invention of claim 5 , even if a difference in temperature occurs due to the direction of the air conditioned space in the winter season, it is possible to freely switch heating and outside air cooling with a two-pipe system to improve comfort. Because it is a two-pipe type, heat source equipment and piping equipment for circulating water are simplified to save energy and cost. Because it is humidified with a steam type humidifier, it becomes a comfortable environment without becoming humidification shortage.

According to the sixth aspect of the present invention, it is possible to achieve energy saving by increasing the air volume of the process with the smaller enthalpy required for cooling or heating the air for air conditioning to reduce the air conditioning load. Therefore, stable air conditioning can be performed on the air conditioned space even if the air conditioning load of the air conditioned space and the external air load become unbalanced and the energy supply from the heat source machine to the air conditioner is excessive or insufficient.

According to the invention of claim 7 , the outside air, which is air conditioning air, is cooled and dehumidified by the third heat exchanger, and the return air, which is air conditioning air, is cooled without being dehumidified by the fourth heat exchanger. In the formula, the external air load (latent heat) and the indoor load (sensible heat) are treated separately to obtain the reheat effect, and the reheat energy component saves energy. Because it is a two-pipe type, heat source equipment and piping equipment for circulating water are simplified to save energy and cost. The air conditioning system can be simplified and the cost can be reduced by minimizing the number of pipe lengths constituting the second and third water channels and the number of third water amount adjustment valves. Even if a difference in temperature occurs due to the direction of the air conditioned space, heating and cooling can be freely switched by the second heat pump regardless of the temperature of the circulating water, and the comfort can be improved.

  1 to 7 show an air conditioning system according to the present invention, and the air conditioning system includes an air conditioner 1, an air conditioner control device 2, an external air conditioner 3, an external air conditioner control device 4, a heat source device 5, and a water circulation device 6 And a heat source unit controller 7. The air-conditioned space S such as a room or a hall, the outdoors, the air conditioner 1, and the air conditioner 3 are connected by a duct (not shown), and supplied with air (SA), outside air (OA), return air ( RA) and exhaust (EA) are blown to each other. In each figure, a solid thick arrow indicates the air flow direction.

  The air conditioner 1 is configured to supply air for air conditioning to the air conditioned space S to cool or heat it. The external air conditioner 3 pre-cools or preheats the outside air and supplies it to the air conditioner 1 so as to exhaust the air of the air conditioned space S to the outside. The air conditioner controller 2 controls the air conditioner 1 to adjust the air conditioning air to an air state (temperature and humidity) suitable for cooling or heating according to the fluctuation of the air conditioning load of the air conditioned space S. .

The heat source unit 5 is configured to adjust the supplied water temperature of the circulating water supplied to the air conditioner 1 in order to adjust the air state of the air conditioning air. The water circulation device 6 has a water circulation pipe 8 configured to circulate the circulation water to the heat source unit 5 and the air conditioner 1, and a water pump 9 having a function capable of changing the water speed and water supply amount of the circulation water of the water circulation pipe 8. And have. The heat source controller 7 is a controller independent of the air conditioner controller 2 and configured to control the heat source 5 to switch the circulating water to the supplied water temperature according to the state of the external air load .

  The heat source unit controller 7 detects the temperature and humidity of the outside air, the outside air temperature and humidity detector 10, the supplied water temperature detector 11 which detects the supplied water temperature of circulating water to the air conditioner 1, and the heat source unit 5 from the air conditioner 1. A return water temperature detector 12 that detects the return water temperature of the circulating water that has returned to the above, a water detection detector 13 that detects the water speed and water supply amount of the water circulation pipe 8, a water supply control unit 14, and a water temperature control unit 15; And a heat source output compensation unit 16. The heat source device control device 7 is configured by a microprocessor, various sensors, and other control devices.

The water supply control unit 14 is configured to control the rotation speed of the water supply pump 9 to adjust the water speed and the water supply amount. The supplied water temperature control unit 15 compares the outside air temperature and the outside air humidity set in advance with the outside air temperature and the outside air humidity detected by the outside air humidity detector 10. In accordance with the result, the supplied water temperature of the circulating water is switched. Specifically, when the air-conditioned space S is cooled, the supplied water temperature is high when the outside air is any of high temperature high humidity, low temperature high humidity, high temperature low humidity or low temperature low humidity with respect to the outside air temperature and the outside air humidity preset in advance. It switches to 6 to 7 ° C when wet, to 7 to 8 ° C when low temperature and high humidity, to 8 to 9 ° C when high temperature and low humidity, and to 9 to 10 ° C when low temperature and low humidity. When the space S is heated, the supplied water temperature is switched to 34 to 36 ° C. when the temperature is high or 39 to 41 ° C. when the temperature is low when the outside air is high or low with respect to the outside air temperature set in advance.

The preset outside air temperature and outside air humidity at the time of cooling of the air conditioned space S are, for example, a dry bulb temperature of 28 ° C. and an absolute humidity of 0.011 kg / kg (DA). The preset outside air temperature at the time of heating of the air-conditioned space S is, for example, a dry bulb temperature of 13 ° C. The above-mentioned supplied water temperature and the preset outside air temperature and outside air humidity are an example, and it is not limited to this and setting change is free.

  The heat source output compensation unit 16 sets the temperature difference of the circulating water generated by the supply to the air conditioner 1 (the circulating water supplied from the heat source machine 5 to the air conditioner 1 and the circulating water returned from the air conditioner 1 to the heat source machine 5 When the water temperature difference is out of the preset water temperature difference range (for example, 6 to 10 ° C), the water circulation device 6 is controlled to adjust the water speed of the circulating water to compensate for the excess or deficiency of the heat source machine output. Configure. The water temperature difference of the circulating water is calculated from the water temperature detected by the supplied water temperature detector 11 and the return water temperature detector 12, and is compared with a preset water temperature difference range. If it exceeds the range of the water temperature difference set in advance, the water velocity and the water supply amount of the circulating water are increased, and if it does not reach the water temperature difference range, the water velocity and the water supply amount of the circulating water are reduced.

  As shown in FIG. 2, the external air conditioner 3 includes a first heat pump 20, a humidifier 21, a pair of blowers 22, a mixing damper 23 and a casing 24. The first heat pump 20 performs precooling (cooling) or preheating (heating) of the outside air by heat exchange between the outside air of the air for air conditioning and the air of the air conditioned space S. The blower 22 supplies outside air to the air conditioner 1 and exhausts the air of the air conditioned space S to the outside. The mixing damper 23 is configured to mix the air of the air conditioned space S before being cooled or heated by the first heat pump 20 and to precool or preheat it.

  The first heat pump 20 repeats the compression / condensation / expansion / evaporation process sequence with respect to the circulating refrigerant, and absorbs heat in the refrigerant evaporation process with respect to the outside air and the exhaust heat exchange with the circulating refrigerant. The seventh heat exchanger 25 and the eighth heat exchanger 27, which perform different processes, ie, the evaporation process and the condensation process of the circulating refrigerant, the compressor 27, and the decompression of the expansion valve or the like for expanding the circulating refrigerant. At least a mechanism 28, and a switching mechanism 29, such as a valve, for switching the evaporation process and the condensation process of the seventh heat exchanger 25 and the eighth heat exchanger 27, and these are connected by piping so as to circulate the refrigerant. Do.

  The first heat pump 20 is an air-cooled heat pump that uses exhaust (air in the conditioned space S) as an air heat source, sends the exhaust to the eighth heat exchanger 27 with the blower 22 and exchanges heat with the refrigerant. The 1st heat pump 20 is installed in a ceiling by what is called an indoor-outdoor integrated type. Although the first heat pump 20, the humidifier 21 and the blower 22 are provided in the casing 24 in the illustrated example, the mixing damper 23 may also be provided in the casing 24.

  The external air conditioner control device 4a includes at least an air volume control unit 30, a humidification control unit 31, and a compressor control unit 32. The external air conditioner controller 4a comprises a microprocessor, various sensors, and other control devices. The air volume control unit 30 controls the rotation speed of the blower 22 and the damper opening degree of the mixing damper 23 to adjust the air volumes of the outside air, the return air, and the exhaust air. The humidification control unit 31 controls the humidifier 21 to adjust the amount of humidification to the outside air. The compressor control unit 32 is configured to control the number of rotations of the compressor 27 to adjust the ability to cool or heat.

  FIG. 3 shows the first air conditioner 1 a of the plurality of air conditioners 1. The first air conditioner 1a includes a first heat exchanger 35, a second heat exchanger 36, a first water passage 37, a bypass water passage 38, a first water amount adjusting valve 39, a second water amount adjusting valve 40, and a first humidifier. 41, a second humidifier 42, a first damper 43, a second damper 44, a third damper 45, a first blower 46 and a casing 47. Although the first heat exchanger 35, the second heat exchanger 36, the first humidifier 41, the second humidifier 42, and the first blower 46 are provided in the casing 47 in the illustrated example, the air conditioner controller 2a, the first heat exchanger 35, The first water passage 37, the bypass water passage 38, the first water amount adjustment valve 39, the second water amount adjustment valve 40, the first damper 43, the second damper 44 and the third damper 45 may be provided in the casing 47.

  The first heat exchanger 35 is configured to perform a first process of cooling or heating the outside air of the air-conditioning air in circulation of circulating water. The second heat exchanger 36 is configured to perform a second process of cooling or heating the return air of the air-conditioning air in circulation of circulating water. The first water channel 37 is configured by providing water piping so as to circulate circulating water to the first heat exchanger 35 and then to circulate the second heat exchanger 36. The bypass water channel 38 is configured by providing a water pipe so as to branch from the first water channel 37 and divert the circulating water after the first treatment without passing through the second heat exchanger 36.

  The first water amount adjustment valve 39 is configured by a two-way valve of a water amount proportional variation method so as to adjust the first treatment capacity of the first heat exchanger 35 by changing the circulation amount of circulating water before the first treatment. . The second water amount adjustment valve 40 changes the distribution of the circulation amount of the circulating water in the first water passage 37 and the bypass water passage 38 so as to adjust the capacity of the second treatment of the second heat exchanger 36. It consists of a three-way valve. The second water amount adjustment valve 40 may be configured by a three-way valve that switches so that the entire amount flows into one of the first water passage 37 and the bypass water passage 38 and the other does not flow.

  The first humidifier 41 is of a vaporization type in which outside air of air conditioning air is humidified by evaporation of water under the wind of the first heat exchanger 35. The second humidifier 42 is of a vaporization type in which the return air of the air conditioning air is humidified by evaporation of water under the wind of the second heat exchanger 36. The first damper 43 increases or decreases the amount of outside air of the air conditioning air introduced into the first air conditioner 1a. The second damper 44 and the third damper 45 increase / decrease the amount of return air of the air conditioning air taken into the first air conditioner 1a. The first blower 46 increases or decreases the amount of air supplied to the air-conditioned space S from the air conditioning air. The outside air taken in from the first damper 43 by the first fan 46 and the return air taken in from the third damper 45 pass through the first heat exchanger 35 and the return air taken in from the second damper 44 is The two heat exchangers 36 are mixed with each other and sent to the conditioned space S. The amount of outside air taken in from the first damper 43 is adjusted so that the carbon dioxide concentration of the air conditioned space S is in a preset range.

  As shown in FIG. 4, the first heat exchanger 35 is configured by inserting a group of heat transfer tubes 19 into a group of heat transfer plates 18 in the same manner as a general plate fin coil. Circulating water is allowed to flow into the heat transfer pipe 19 and the air conditioning air is brought into contact with the heat transfer pipe 19 and the heat transfer plate 18 to exchange heat between the air conditioning air and the circulating water. The second heat exchanger 36, the seventh heat exchanger 25 and the eighth heat exchanger 27 are configured in the same manner as the first heat exchanger 35, but the seventh heat exchanger 25 and the eighth heat exchanger 27 The refrigerant flows inside the heat pipe 19 to exchange heat with the air for air conditioning. As a result, the air for air conditioning becomes cold air or warm air and is supplied to the air conditioner 1 and the air conditioned space S.

  As shown in FIG. 3, the air conditioner controller 2a of the first air conditioner 1a detects the temperature and humidity of the outside air, the outside air temperature and humidity detector 50, and the return air temperature and humidity detector which detects the temperature and humidity of return air. 51, air supply temperature and humidity detector 52 for detecting the temperature and humidity of the air supply of the air conditioner 1a, air volume control unit 53, water amount control unit 54, humidification control unit 55, first outside air cooling operation unit 56, first cooling capacity compensation A unit 57, a first air conditioning capacity compensation unit 58, and a first air conditioning capacity control unit 59 are provided. The air conditioner control device 2a is composed of a microprocessor, various sensors, and other control devices.

  The air volume control unit 53 includes the rotational speed of the first blower 46 of the air conditioner 1a, the damper opening degree of the first damper 43, the damper opening degree of the second damper 44, and the damper opening degree of the third damper 45. It controls to adjust each air volume of outside air, return air, and charge air. The water amount control unit 54 controls the first water amount adjusting valve 39 and the second water amount adjusting valve 40 to adjust the circulation amounts of circulating water in the first heat exchanger 35 and the second heat exchanger 36. Configure to The humidification control unit 55 is configured to control the amount of humidification water of the first humidifier 41 and the second humidifier 42 to adjust the amount of humidification to the outside air and the return air.

  In the first outside air cooling operation unit 56, the temperature of one or both of the air for air conditioning before the first processing and the air for air conditioning before the second processing detected by the outside air temperature and humidity detector 50 When the temperature of the air conditioned space S is lower than the detected temperature of the air conditioned space S, the air conditioned air is used to cool the air conditioned space S. In this case, the air conditioning air can be vaporized and cooled in one or both of the first humidifier 41 and the second humidifier 42 to reduce the cooling load. The first cooling capacity compensation unit 57 reduces the cooling load of the first air conditioner 1a by performing vaporization cooling by humidifying the return air with the second humidifier 42 after the first process of cooling without dehumidification. Configure to

  The first air conditioning capacity compensation unit 58 compares the first process enthalpy required for the first process with the second process enthalpy required for the second process to increase the air volume of the air conditioning air for the process having a small enthalpy. The air conditioning load of the first air conditioner 1a is configured to be reduced. Here, the enthalpy at the time of the first treatment is the enthalpy required to cool or heat the outside air before the first treatment to the preset air supply temperature, and the enthalpy at the time of the second treatment is the return air before the second treatment Is the enthalpy required to cool or heat to a preset charge air temperature.

  For example, when the enthalpy at the time of the first processing is smaller than the enthalpy at the time of the second processing during the cooling operation, the air volume of the outside air of the air conditioning air introduced into the air conditioner 1a is increased to lower the air conditioning (cooling) load. The first processing enthalpy and the second processing enthalpy are calculated and compared from the temperature and humidity detected by the outside air temperature / humidity detector 50, the return air temperature / humidity detector 51, and the air supply temperature / humidity detector 52. As a result, when the first processing enthalpy is smaller than the second processing enthalpy, the number of rotations of the first blower 46, the opening degree of the first damper 43, and the second opening of the first damper 43 are increased so that the flow rate of the outside air of the air conditioning air increases. The damper opening degree of the damper 44 is appropriately adjusted.

The first air conditioning capacity control unit 59 performs an operation that performs both the first process and the second process if the air conditioning load of the air conditioned space S is large, and an operation that performs only the first process if the air conditioning load of the air conditioned space S is small. , To control the ability to cool or heat the air-conditioned space S by switching. For example, if the ability to cool or heat the air-conditioned space S is insufficient even if only the first process is performed, the second process is used in combination to compensate for the insufficient capacity.

  When the air conditioner 1a performs a cooling operation requiring dehumidification in summer, the seventh heat exchanger 25 and the eighth heat exchanger 27 of the first heat pump 20 of the external air conditioner 3 exchange heat between the outside air and the exhaust gas to perform precooling Outside air is supplied to the air conditioner 1a. In the air conditioner 1a, the target air supply temperature is achieved by the reheat effect generated by cooling and dehumidifying the outside air with the first heat exchanger 35 and mixing it with the cooled return air without dehumidifying with the second heat exchanger 36. And control to the air supply humidity. Thereby, the air-conditioned space S is air-conditioned to a preset temperature and humidity. At the time of cooling operation without dehumidification of the outside air, the cooling operation is performed while energy saving is achieved by evaporative cooling of the air conditioning air by one or both of the first humidifier 41 and the second humidifier 42.

  When the heating operation is performed in winter, outside air and heat are exchanged by the seventh heat exchanger 25 and the eighth heat exchanger 27 of the first heat pump 20 of the outside air conditioner 3, and the preheated outside air is supplied to the air conditioner 1a. . In the air conditioner 1a, the outside air is heated by the first heat exchanger 35, the return air is heated by the second heat exchanger 36, and is humidified by the first humidifier 41 and the second humidifier 42 to mix. Control the temperature and humidity of the air supply. Depending on the situation, during the cooling operation and the heating operation described above, the mixing damper 23 of the external air conditioner 3 mixes the air of the air conditioned space S before being cooled or heated by the first heat pump 20 to perform precooling or preheating. Do. The air conditioner 1a may perform a cooling operation or a heating operation without precooling or preheating the outside air in the external air conditioner 3.

  When the circulating water performs cooling operation with warm water in the winter, outside air having a temperature lower than the temperature of the air-conditioned space S is supplied from the external conditioner 3 to the air conditioner 1a. The outside air is heated by the first heat exchanger 35 to a temperature suitable for cooling, and the return air is heated by the second heat exchanger 36 or not heated as it is, the first humidifier 41 and the second humidifier 42 It humidifies in one or both of, and supplies air conditioned space S.

  FIG. 5 shows another embodiment of the air conditioner 1a of FIG. This air conditioner 1a is a steam type third system in which air conditioning air is humidified with steam under the wind of one or both of the first heat exchanger 35 and the second heat exchanger 36 (the first heat exchanger 35 in the illustrated example). A humidifier 48 is provided. In the first air conditioner control device 2a, the temperature of one or both of the air conditioning air before the first processing and the air conditioning air before the second processing detected by the outside air temperature humidity detector 50 is returned to the air temperature humidity detector 51 The second outside air cooling operation unit 60 cools the air conditioned space S by using the air conditioning air when the temperature of the air conditioned space S is lower than the temperature of the air conditioned space S detected. The other configuration is the same as that of the embodiment shown in FIG.

  When the air conditioner 1a performs a cooling operation in the winter, the outside air having a temperature lower than the temperature of the air conditioned space S is supplied from the external air conditioner 3 to the air conditioner 1a. This outside air is heated to a temperature suitable for cooling by the first heat exchanger 35, and is steam-humidified by the third humidifier 48, and the return air is heated by the second heat exchanger 36 or not heated, and is conditioned as it is. Supply to the space S.

  FIG. 6 shows the second air conditioner 1 b among the plurality of air conditioners 1. The second air conditioner 1b includes a third heat exchanger 62, a second heat pump 65 having a fourth heat exchanger 63 and a fifth heat exchanger 64, a second water passage 66, a third water passage 67, and a third water amount adjustment. A valve 68, a fourth humidifier 69, a fourth damper 71, a fifth damper 72, a sixth damper 73, a second blower 74, and a casing 75 are provided. Although the third heat exchanger 62, the second heat pump 65, the fourth humidifier 69, the fifth humidifier 97 and the second blower 74 are provided in the casing 75 in the illustrated example, the air conditioner control device 2b, the second water channel The third water passage 67, the third water amount adjustment valve 68, the fourth damper 71, the fifth damper 72, and the sixth damper 73 may be provided in the casing 75.

  The second heat pump 65 repeats the compression / condensation / expansion / evaporation process sequence to the circulating refrigerant, and dissipates the heat absorption in the refrigerant evaporation process with respect to the return air that exchanges heat with the circulating refrigerant and the circulating water in the refrigerant evaporation process The fourth heat exchanger 63 and the fifth heat exchanger 64, which perform different processes, ie, the evaporation process and the condensation process of the circulating refrigerant, the compressor 76, an expansion valve for expanding the circulating refrigerant, etc. At least a pressure reducing mechanism 77 and a switching mechanism 78 such as a valve for switching the evaporation process and the condensation process of the fourth heat exchanger 63 and the fifth heat exchanger 64. Configure.

  The third heat exchanger 62 is configured to perform a third process of cooling or heating the outside air of the air-conditioning air in circulation of circulating water. The fourth heat exchanger 63 is configured to perform a fourth process of cooling or heating the return air of the air-conditioning air by circulating the refrigerant. The second water passage 66 is configured to cause the circulating water before the third treatment to flow to the third heat exchanger 62. The third water passage 67 is configured to branch from the second water passage 66 and to circulate the circulating water before the third treatment to the fifth heat exchanger 64.

  The third water amount adjustment valve 68 changes the distribution of the circulation amount of the circulating water of the second water passage 66 and the third water passage 67 to adjust the capacity of the third treatment of the third heat exchanger 62, and the water amount proportional variation method It consists of a three-way valve. The third water amount adjustment valve 68 may be configured by a three-way valve that switches so that the entire amount flows into one of the second water passage 66 and the third water passage 67 and the other does not flow.

  The fourth humidifier 69 is a steam type that is humidified with steam under the wind of the third heat exchanger 62. The fourth damper 71 increases or decreases the amount of outside air of the air conditioning air introduced into the second air conditioner 1b. The fifth damper 72 and the sixth damper 73 increase / decrease the amount of return air of the air-conditioning air introduced into the second air conditioner 1 b. The second blower 74 increases or decreases the amount of air supplied to the conditioned space S from the air for air conditioning. The outside air taken from the fourth damper 71 by the second blower 74 and the return air taken from the sixth damper 73 pass through the third heat exchanger 62 and the return air taken from the fifth damper 72 is the fifth The four heat exchangers 63 are mixed with each other and sent to the conditioned space S. The amount of outside air introduced from the fourth damper 71 is adjusted such that the carbon dioxide concentration in the air-conditioned space S is in a preset range.

  The third heat exchanger 62 is configured in the same manner as the first heat exchanger 35 described above. The fourth heat exchanger 63 is configured in the same manner as the seventh heat exchanger 25 described above. The fifth heat exchanger 64 is configured by dividing the inside by a heat transfer plate as in a general plate type heat exchanger, and circulating water and a refrigerant are alternately flowed between the heat transfer plate and the heat transfer plate to transfer the heat Heat exchange between the circulating water and the refrigerant is performed via the heat plate.

  The air conditioner controller 2b of the second air conditioner 1b detects the temperature and humidity of the outside air, the outside air temperature and humidity detector 81, the temperature and humidity detector 82 for detecting the temperature and humidity of the return air, and the air conditioner 1b An air supply temperature / humidity detector 83 for detecting the temperature and humidity of air, an air flow control unit 84, a water control unit 85, a humidification control unit 86, and a compressor control unit 87 are provided. The air conditioner control device 2b is composed of a microprocessor, various sensors, and other control devices.

  The air volume control unit 84 includes the rotational speed of the second blower 74 of the air conditioner 1b, the damper opening degree of the fourth damper 71, the damper opening degree of the fifth damper 72, and the damper opening degree of the sixth damper 73. It controls to adjust each air volume of outside air, return air, and charge air. The water amount control unit 85 is configured to control the third water amount adjusting valve 68 to adjust the circulation amounts of the circulating water of the third heat exchanger 62 and the fifth heat exchanger 64. The humidification control unit 86 controls the amount of steam generated by the fourth humidifier 69 to adjust the amount of humidification to the air for air conditioning. The compressor control unit 87 is configured to control the number of rotations of the compressor 76 to adjust the ability to cool or heat.

  When the air conditioner 1b performs a cooling operation requiring dehumidification in summer, the seventh heat exchanger 25 and the eighth heat exchanger 27 of the first heat pump 20 of the external air conditioner 3 exchange heat between the outside air and the exhaust gas to perform precooling Outside air is supplied to the air conditioner 1b. In the air conditioner 1b, the target air supply temperature is achieved by the reheat effect generated by cooling and dehumidifying the outside air with the third heat exchanger 62 and mixing with the cooled return air without dehumidifying with the fourth heat exchanger 63. And control to the air supply humidity. Thereby, the air-conditioned space S is air-conditioned to a preset temperature and humidity.

  When the heating operation is performed in winter, outside air and heat are exchanged by the seventh heat exchanger 25 and the eighth heat exchanger 27 of the first heat pump 20 of the air conditioner 3 and the preheated outside air is supplied to the air conditioner 1b. . In the air conditioner 1b, the outside air is heated by the third heat exchanger 62 and is humidified by the fourth humidifier 69, and the return air is heated by the fourth heat exchanger 63 and mixed, thereby mixing the temperature and humidity of the supplied air. Control. Depending on the situation, during the cooling operation and the heating operation described above, the mixing damper 23 of the external air conditioner 3 mixes the air of the air conditioned space S before being cooled or heated by the first heat pump 20 to perform precooling or preheating. Do. The air conditioner 1b may perform a cooling operation or a heating operation without precooling or preheating the outside air in the external air conditioner 3.

  When circulating water is cooled by hot water in the winter, the outside air supplied from the outside air conditioner 3 to the air conditioner 1b is heated by the third heat exchanger 62 to a temperature suitable for cooling, and the steam by the fourth humidifier 69 Humidify. The return air is cooled or heated to a temperature suitable for cooling by the fourth heat exchanger 63 of the second heat pump 65, and is supplied to the conditioned space S.

  FIG. 7 shows the third air conditioner 1 c among the plurality of air conditioners 1. The third air conditioner 1c includes a sixth heat exchanger 94, a fourth water passage 95, a fourth water amount adjustment valve 96, a fifth humidifier 97, a seventh damper 98, an eighth damper 99, a third blower 100, and a casing. It has 101. Although the sixth heat exchanger 94, the fifth humidifier 97 and the third blower 100 are provided in the casing 101 in the illustrated example, the air conditioner control device 2c, the fourth water channel 95, the fourth water amount adjustment valve 96, the seventh The damper 98 and the eighth damper 99 may also be provided in the casing 101.

  The sixth heat exchanger 94 is configured to perform a fifth process of cooling or heating the outside air and the return air of the air conditioning air in circulation of the circulating water. The fourth water channel 95 is configured by providing a water pipe so as to circulate circulating water to the sixth heat exchanger 94. The fourth water amount adjustment valve 96 is configured by a two-way valve of a water amount proportional variation method so as to adjust the cooling or heating ability of the sixth heat exchanger 94 by changing the circulation amount of circulating water.

  The fifth humidifier 97 is a steam type that humidifies the air-conditioning air with steam under the wind of the sixth heat exchanger 94. The seventh damper 98 increases / decreases the amount of outside air of the air conditioning air introduced into the third air conditioner 1c. The eighth damper 99 increases / decreases the return air amount of the air-conditioning air introduced into the third air conditioner 1c. The third fan 100 increases or decreases the air supply amount of the air for air conditioning to the air conditioned space S. The outside air taken in from the seventh damper 98 and the return air taken in from the eighth damper 99 are mixed with each other by the third fan 100 and are sent to the air conditioned space S through the sixth heat exchanger 94. The amount of outside air introduced from the seventh damper 98 is adjusted so that the carbon dioxide concentration in the conditioned space S falls in a preset range.

  The air conditioner controller 2c of the third air conditioner 1c detects the temperature and humidity of the outside air, the outside air temperature and humidity detector 102, the return air temperature and humidity detector 103, and the air conditioner 1c. An air supply temperature / humidity detector 104 for detecting air temperature and humidity, an air flow control unit 105, a water amount control unit 106, a humidification control unit 107, and a fifth outside air cooling operation unit 108 are provided. The air conditioner control device 2c is composed of a microprocessor, various sensors, and other control devices.

  The air volume control unit 105 controls the number of rotations of the third fan 100 of the air conditioner 1c, the damper opening degree of the seventh damper 98, and the damper opening degree of the eighth damper 99 to control outside air, return air and air supply. Configure to adjust the volume of each air flow. The water amount control unit 106 is configured to control the valve opening degree of the fourth water amount adjusting valve 96 to adjust the circulation amount of the circulating water of the sixth heat exchanger 94. The humidification control unit 107 is configured to control the amount of steam generated by the fifth humidifier 97 to adjust the amount of humidification to the outside air and the return air.

  When the temperature of the air conditioning air before the fifth processing detected by the outside air temperature and humidity detector 102 is lower than the temperature of the air conditioned space S detected by the return air temperature and humidity detector 103, the fifth outside air cooling operation unit 108 The air-conditioned space S is cooled using air conditioning air. When the circulating water performs cooling operation with warm water in the winter, outside air having a temperature lower than the temperature of the air-conditioned space S is supplied from the external conditioner 3 to the air conditioner 1a. The outside air and the return air are heated by the sixth heat exchanger 94 to a temperature suitable for cooling, and are steam-humidified by the fifth humidifier 97 and supplied to the conditioned space S.

  The present invention is not limited to the above-described embodiment. The heat source unit 5 is applicable to various types such as a heat pump type chiller and an absorption type. The external air conditioner 3, the mixing damper 23, the third damper 45, and the sixth damper 73 may be omitted. The first water amount adjusting valve 39, the second water amount adjusting valve 40, the third water amount adjusting valve 68, and the fourth water amount adjusting valve 96 may be other than the two-way valve or the three-way valve. In the description of the above-described embodiment, the outside air of the air conditioning air may be replaced with the return air, and the return air may be replaced with the outside air.

  Moreover, it has both a vaporization type humidifier and a steam type humidifier, as part or all of the first humidifier 41, the second humidifier 42, the third humidifier 48, the fourth humidifier 69 and the fifth humidifier 97. It may consist of things. For example, the air conditioning air is first humidified by the vaporization type humidifier with low energy consumption, and when the humidification by the vaporization type humidifier is insufficient, only the shortage is humidified by the steam humidifier as a minimum. , Both humidification accuracy improvement and consumption energy reduction can be achieved. The water circulation pipe 8 can be freely changed to various methods such as a direct return method, a reverse return method, and a combination method thereof.

It is explanatory drawing which shows the whole structure of the air conditioning system of this invention. FIG. 2 is a simplified explanatory view showing an internal configuration of an external air conditioner. It is a simplification explanatory view showing the internal configuration of the 1st air conditioner. It is a simplified explanatory view of a heat exchanger. It is a simplification explanatory view showing other examples of the 1st air conditioner. It is a simplification explanatory view showing the internal configuration of the 2nd air conditioner. It is a simplification explanatory view showing the internal configuration of the 3rd air conditioner.

DESCRIPTION OF SYMBOLS 1 air conditioner 2 air conditioner control device 3 external air conditioner 5 heat source device 6 water circulation device 7 heat source device control device 16 heat source device output compensation part 20 1st heat pump 35 1st heat exchanger 36 2nd heat exchanger 37 1st waterway 38 Bypass water passage 39 1st water amount adjustment valve 40 2nd water amount adjustment valve 41 1st humidifier 42 2nd humidifier 46 1st blower 48 3rd humidifier 56 1st outside air cooling operation part 57 1st cooling capacity compensation part 58 1st Air conditioning capacity compensation unit 59 1st air conditioning capacity control unit 60 2nd outside air cooling operation unit 62 3rd heat exchanger 63 4th heat exchanger 64 5th heat exchanger 65 2nd heat pump 66 2nd water channel 67 3rd water channel 68 3 Water Volume Adjustment Valve 69 Fourth Humidifier 74 Second Blower 76 Compressor 94 Sixth Heat Exchanger 95 Fourth Channel 96 Fourth Water Volume Adjustment Valve 97 Fifth Humidifier 100 Third Blower 108 Fifth Air Cooling System Department S the air-conditioned space

Claims (7)

A plurality of air conditioners (1 ) for supplying air conditioning air to the air conditioned space (S) for cooling or heating, and a first air conditioner (1a) of the plurality of air conditioners (1) A first air conditioner controller (2a) for adjusting the air conditioning air to an air state suitable for the cooling or the heating, and supplying the air conditioner (1) for adjusting the air state of the air conditioning air Heat source machine (5) for adjusting the temperature of the supplied circulating water, and a control device independent of the first air conditioner controller (2a), controlling the heat source machine (5) to control the circulating water to the outside air A heat source unit controller (7) for switching to the supplied water temperature according to the state of load;
The heat source controller (7) is any of high temperature and high humidity, low temperature and high humidity, high temperature and low humidity, or low temperature and low humidity with respect to the outside air temperature and the outdoor air humidity preset at the time of cooling of the air conditioned space (S). In the case of the low temperature and low humidity, the supplied water temperature is 6 to 7 ° C. for the high temperature and high humidity, 7 to 8 ° C. for the low temperature and high humidity, and 8 to 9 ° C. for the high temperature and low humidity. Changes the temperature to 9 to 10 ° C., and the supplied water temperature to 34 to 36 ° C. when the outside air temperature is high or low relative to the preset outside air temperature when heating the air conditioned space S And a supply water temperature control unit (15) for switching to 39 to 41 ° C. when the temperature is low,
A first heat exchanger (35) for performing a first treatment in which the first air conditioner (1a) cools or heats the air conditioning air in the circulation of the circulating water; and the air conditioning air in the circulation of the circulating water A second heat exchanger (36) for performing a second process of cooling or heating the air-conditioning air after the first process and the air-conditioning air after the second process to the air-conditioned space (S) A first fan (46) for supplying, a first water channel (37) for circulating the circulating water to the first heat exchanger (35) and then circulating to the second heat exchanger (36); A bypass water passage (38) branched from one water passage (37) and diverting the circulating water after the first treatment without passing through the second heat exchanger (36), and fluctuating the circulation amount of the circulating water A first water control valve (39) for adjusting the capacity of the first process of the first heat exchanger (35); The second amount of water for adjusting the capacity of the second process of the second heat exchanger (36) by varying the distribution of the circulating amount of the circulating water of the second heat exchanger (36) and the bypass water channel (38) And a control valve (40),
The air conditioning load of the air conditioned space (S) in the operation where the first air conditioner controller (2a) performs both the first process and the second process if the air conditioning load of the air conditioned space (S) is large If the air conditioner is small, the air conditioning system is provided with a first air conditioning capacity control unit (59) for controlling the ability to cool or heat the air conditioned space (S) by switching to an operation in which only the first process is performed. Harmonized system. A water circulation device (6) for circulating circulating water is provided, and when the heat source controller (7) causes the water temperature difference of the circulating water generated by the supply to the air conditioner (1) to fall outside the preset water temperature difference range. The air conditioning system according to claim 1, further comprising a heat source unit output compensation unit (16) that compensates for excess or deficiency of the heat source unit output by controlling a water circulation unit (6) to adjust the water speed of the circulating water. . An air conditioner (1) is provided with a first heat pump (20) and heat exchange between the air for air conditioning and the air in the air conditioned space (S) by the first heat pump (20) to precool or preheat the air for air conditioning (1 The air conditioning system according to claim 1 or 2, further comprising an external air conditioner (3) for supplying the air conditioner. A vaporization type first humidifier (41) in which the first air conditioner (1a) humidifies air conditioning air by evaporation of water under the wind of the first heat exchanger (35), and a second heat exchanger (36) The air conditioning system according to any one of claims 1 to 3 , further comprising: a vaporization type second humidifier (42) for humidifying the air conditioning air by evaporation of water under the wind of the air) . A steam-type third humidifier (48) in which the first air conditioner (1a) humidifies the air conditioning air with steam under the wind of one or both of the first heat exchanger (35) and the second heat exchanger (36). And the first air conditioner controller (2a) controls the temperature of the air conditioned space (S) at one or both of the air conditioning air before the first treatment and the air conditioning air before the second treatment. The air conditioning system according to any one of claims 1 to 3, further comprising a second outside air cooling operation unit (60) for cooling the air conditioned space (S) by using the air conditioning air when the air conditioning air temperature is lower . The first air conditioner control device (2a) compares the first process enthalpy required for the first process with the second process enthalpy required for the second process, thereby increasing the air volume of the air conditioning air process having a small enthalpy. The air conditioning system according to any one of claims 1 to 5, further comprising a first air conditioning capacity compensator (58) for reducing the air conditioning load of the first air conditioner (1a) . A third heat exchanger (62) for performing a third process in which a second air conditioner (1b) among the plurality of air conditioners (1) cools or heats air for air conditioning in circulation of circulating water; A fourth heat exchanger (63) that performs a fourth process of cooling or heating the air conditioning air in circulation, a fifth heat exchanger (64) that exchanges heat between the refrigerant and the circulating water, and the fourth process A fourth heat exchanger (63), a fifth heat exchanger (64), and a compressor (76) configured to switch the cooling and heating of the second to adjust the capacity of the fourth process 2 heat pump (65), second air blower (74) for supplying the air conditioning air after the third treatment and the air conditioning air after the fourth treatment to the air conditioned space (S), and the third treatment A second water channel (66) for circulating the previous circulating water to the third heat exchanger (62), and the second water channel (66) Of the second water channel (66) and the third water channel (67), and the third water channel (67) which is branched to circulate the circulating water before the third treatment to the fifth heat exchanger (64). The third water amount adjusting valve (68) for adjusting the capacity of the third process of the third heat exchanger (62) by varying the distribution of the circulating amount of the circulating water The air conditioning system as described in any one .

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