CN119022519A - Energy-saving refrigeration system and control method thereof - Google Patents
Energy-saving refrigeration system and control method thereof Download PDFInfo
- Publication number
- CN119022519A CN119022519A CN202411123216.7A CN202411123216A CN119022519A CN 119022519 A CN119022519 A CN 119022519A CN 202411123216 A CN202411123216 A CN 202411123216A CN 119022519 A CN119022519 A CN 119022519A
- Authority
- CN
- China
- Prior art keywords
- temperature
- evaporator
- energy
- output end
- refrigeration system
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/37—Capillary tubes
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
-
- 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
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
本发明公开了一种节能型制冷系统及其控制方法，所述节能型制冷系统包括控制装置、第一蒸发器、第二蒸发器、第一冷凝机构、第二冷凝机构以及分别与控制装置电性连接的第一动力机构、第一压缩机构、第二动力机构和第二压缩机构，所述第一蒸发器以及所述第二蒸发器沿着进出风方向依次设置；所述第一蒸发器以及第一冷凝机构分别与第一压缩机构或第一动力机构连接，以形成第一制冷回路或第二制冷回路；所述第二蒸发器以及第二冷凝机构分别与第二压缩机构或第二动力机构连接，以形成第三制冷回路或第四制冷回路；本申请公开的节能型制冷系统，通过第一蒸发器对空气进行预冷，并通过第二蒸发器对空气进一步降温，确保送风温度可满足环境舒适性需求。
The present invention discloses an energy-saving refrigeration system and a control method thereof. The energy-saving refrigeration system comprises a control device, a first evaporator, a second evaporator, a first condensing mechanism, a second condensing mechanism, and a first power mechanism, a first compression mechanism, a second power mechanism, and a second compression mechanism electrically connected to the control device, respectively. The first evaporator and the second evaporator are arranged in sequence along the air inlet and outlet directions; the first evaporator and the first condensing mechanism are respectively connected to the first compression mechanism or the first power mechanism to form a first refrigeration circuit or a second refrigeration circuit; the second evaporator and the second condensing mechanism are respectively connected to the second compression mechanism or the second power mechanism to form a third refrigeration circuit or a fourth refrigeration circuit; the energy-saving refrigeration system disclosed in the present application pre-cools the air through the first evaporator, and further cools the air through the second evaporator to ensure that the supply air temperature can meet the environmental comfort requirements.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to an energy-saving refrigeration system and a control method thereof.
Background
In order to respond to the national energy conservation and emission reduction policy, the natural cold source is generally used for increasing and utilizing, so that the consumption of a power supply is reduced, and the aim of improving the energy efficiency level of the data center is fulfilled; the cold source mainly adopted by the data center is a low-temperature environment in winter and natural water temperature; the energy consumption of the data center for each year heat dissipation is high, so that energy conservation and emission reduction are not sustained.
The machine room of the data center is designed into a closed environment so as to ensure the temperature, humidity and cleaning requirements required by the operation of the components, and the temperature in the machine room is always kept above 30 ℃ due to the fact that the components are used throughout the year and accompanied by heating; in view of the outdoor temperature of north winter is generally lower than 5 ℃, a power heat pipe product appears in order to fully utilize natural refrigerants to cool a machine room.
Powered heat pipe products for data centers are increasingly favored, mainly due to two factors: firstly, the technology of fluorine pump products is mature and the operation is stable and reliable; secondly, the energy-saving effect is remarkable; in general, the dynamic heat pipe product adopts a double-circulation system, namely a compressor circulation system and a fluorine pump circulation system are combined to form a series working mode; when the outdoor temperature is higher, the compressor circulation system is utilized for refrigerating so as to eliminate waste heat generated in the machine room and ensure that the temperature of the machine room is maintained in a proper range; when the temperature of the machine room reaches the design standard, the system can be automatically switched to a fluorine pump circulation mode so as to further reduce the energy consumption and continuously remove the waste heat in the machine room; the working principle of the fluorine pump circulation is based on the physical state change and the heat transfer characteristic of the refrigerant; specifically, under an outdoor low-temperature environment, the refrigerant can be naturally condensed into a liquid state, and then the fluorine pump conveys the condensed low-temperature liquid refrigerant into a machine room; in a machine room, a large amount of heat is absorbed when the low-temperature liquid refrigerant evaporates, so that the low-temperature liquid refrigerant is converted into gaseous refrigerant, and the gaseous refrigerant is then conveyed to the outside of a room for condensation circulation again; through the continuous circulation process, waste heat in the machine room can be effectively discharged, and stable and efficient operation of the machine room environment is ensured.
The refrigerating capacity generated by the existing power heat pipe product is closely related to the outdoor side temperature, and is usually designed according to the temperature of 5 ℃, namely, when the outdoor temperature is lower than 5 ℃, the refrigerating is realized by adopting a fluorine pump circulation system, and when the outdoor temperature is higher than 5 ℃, the refrigerating is realized by switching to a compressor circulation system, so that the temperature in a machine room cannot exceed the standard, and irreversible damage to components in the machine room is avoided.
In view of the above, the power heat pipe product has obvious energy-saving effect only below the design working point, and has the problems of limited use and poor energy-saving effect.
It can be seen that there is a need for improvements and improvements in the art.
Disclosure of Invention
In view of the shortcomings of the prior art, the invention aims to provide an energy-saving refrigeration system, which has the advantages of high temperature control precision, high working flexibility and good energy-saving effect.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The energy-saving refrigeration system comprises a control device, a first evaporator, a second evaporator, a first condensing mechanism, a second condensing mechanism, a first power mechanism, a first compression mechanism, a second power mechanism and a second compression mechanism, wherein the first power mechanism, the first compression mechanism, the second power mechanism and the second compression mechanism are respectively and electrically connected with the control device, the first evaporator and the second evaporator are sequentially arranged along the air inlet and outlet direction, the first evaporator, the first compression mechanism and the first condensing mechanism are connected to form a first refrigeration loop, and the first evaporator, the first power mechanism and the first condensing mechanism are connected to form a second refrigeration loop; the second evaporator, the second compression mechanism and the second condensation mechanism are connected to form a third refrigeration loop, and the second evaporator, the second power mechanism and the second condensation mechanism are connected to form a fourth refrigeration loop.
The energy-saving refrigeration system further comprises a first fan, a first temperature sensor, a second temperature sensor, a first temperature and humidity sensor and a second temperature and humidity sensor which are respectively and electrically connected with the control device; the first fan is arranged on the air outlet side of the second evaporator; the first temperature sensor and the first temperature and humidity sensor are respectively arranged on the air inlet side of the first evaporator, the first temperature sensor is used for acquiring return air temperature, and the first temperature and humidity sensor is used for acquiring return air temperature and humidity; the second temperature sensor and the second temperature and humidity sensor set up respectively in the air-out side of first fan, second temperature sensor is used for obtaining the air supply temperature, second temperature and humidity sensor is used for obtaining the air supply humiture.
In the energy-saving refrigeration system, the structures of the first compression mechanism and the second compression mechanism are consistent, the first compression mechanism comprises an oil return capillary tube, a first filter, an oil separator, a compressor and a first one-way valve, wherein the compressor and the first one-way valve are respectively and electrically connected with the control device, the input end of the compressor is connected with the output end of the first evaporator, the output end of the compressor is connected with the input end of the oil separator, the output end of the oil separator is connected with the input end of the first condensation mechanism, the output end of the first condensation mechanism is connected with the input end of the first one-way valve, and the output end of the first one-way valve is connected with the input end of the first evaporator; the oil separator is connected with an oil return end of the compressor through the first filter and the oil return capillary tube.
In the energy-saving refrigerating system, the first power mechanism is consistent with the second power mechanism in structure, the first power mechanism comprises a liquid storage tank, a fluorine pump and a second one-way valve, wherein the fluorine pump and the second one-way valve are respectively and electrically connected with the control device, the output end of the first evaporator is connected with the input end of the second one-way valve, the output end of the second one-way valve is connected with the input end of the first condensing mechanism, the output end of the second condensing mechanism is connected with the input end of the liquid storage tank, and the output end of the liquid storage tank is connected with the input end of the first evaporator through the fluorine pump.
In the energy-saving refrigerating system, the first condensing mechanism is consistent with the second condensing mechanism in structure, the first condensing mechanism comprises a condenser, a second fan and a second filter, the input end of the condenser is respectively connected with the output end of the oil separator and the output end of the second one-way valve, the output end of the condenser is connected with the input end of the second filter, and the output end of the second filter is respectively connected with the input end of the liquid storage tank and the input end of the first one-way valve.
The energy-saving refrigeration system further comprises a first throttling mechanism, a second throttling mechanism, a third temperature sensor and a fourth temperature sensor which are respectively and electrically connected with the control device; the third temperature sensor is arranged on the output side of the first evaporator and is used for detecting the temperature of the refrigerant output by the first evaporator; the fourth temperature sensor is arranged on the output side of the second evaporator and is used for detecting the temperature of the refrigerant output by the second evaporator; the input end of the first throttling mechanism is connected with the output end of the first compression mechanism or the output end of the first power mechanism, and the output end of the first throttling mechanism is connected with the input end of the first evaporator; the input end of the second throttling mechanism is connected with the output end of the second compression mechanism or the output end of the second power mechanism, and the output end of the second throttling mechanism is connected with the input end of the second evaporator.
In the energy-saving refrigeration system, the structures of the first throttling mechanism and the second throttling mechanism are consistent, the first throttling mechanism comprises a dry filter and an electronic expansion valve, the output end of the fluorine pump and the output end of the first one-way valve are respectively connected with the input end of the dry filter, the output end of the dry filter is connected with the input end of the electronic expansion valve, and the output end of the electronic expansion valve is connected with the input end of the first evaporator.
The invention also correspondingly provides a control method of the energy-saving refrigeration system, which further comprises a fifth temperature sensor for detecting the outdoor environment temperature and a third temperature sensor for detecting the temperature of the refrigerant output by the first evaporator; the control method is used for realizing the working control of the energy-saving refrigeration system, and comprises the following steps:
Acquiring outdoor environment real-time temperature fed back by a fifth temperature sensor, refrigerant real-time temperature fed back by a third temperature sensor, real-time return air temperature fed back by a first temperature sensor, real-time return air temperature and humidity fed back by a first temperature and humidity sensor and real-time supply air temperature and humidity fed back by a second temperature and humidity sensor;
Calculating a first switching temperature and a second switching temperature according to the real-time temperature, the real-time return air temperature and the real-time supply air temperature and humidity of the refrigerant;
And comparing the first switching temperature, the second switching temperature and the outdoor environment real-time temperature, and adjusting the working state of the energy-saving refrigeration system according to the comparison result.
In the control method, the comparison of the first switching temperature, the second switching temperature and the outdoor environment real-time temperature adjusts the working state of the energy-saving refrigeration system according to the comparison result, and the control method specifically comprises the following steps:
in a preset first detection time, if the real-time temperature of the outdoor environment is continuously less than the first switching temperature and is more than or equal to the second switching temperature, controlling the energy-saving refrigeration system to enter a mixed mode, and controlling the first power mechanism to start and the second compression mechanism to start working;
in a preset first detection time, if the real-time temperature of the outdoor environment is continuously less than the second switching temperature, controlling the energy-saving refrigeration system to enter a natural mode, and controlling the first power mechanism and the second power mechanism to start working;
and in a preset first detection time, if the real-time temperature of the outdoor environment is continuously higher than the first switching temperature, controlling the energy-saving refrigeration system to enter a refrigeration mode, and controlling the first compression mechanism and the second compression mechanism to start working.
In the control method, the first power mechanism comprises a liquid storage tank, a fluorine pump and a second one-way valve, wherein the fluorine pump and the second one-way valve are respectively and electrically connected with the control device, the output end of the first evaporator is connected with the input end of the second one-way valve, the output end of the second one-way valve is connected with the input end of the first condensing mechanism, the output end of the second condensing mechanism is connected with the input end of the liquid storage tank, and the output end of the liquid storage tank is connected with the input end of the first evaporator through the fluorine pump; the control of the energy-saving refrigeration system to enter a hybrid mode specifically comprises the following steps:
Acquiring the operating frequency of a fluorine pump;
When the operating frequency of the fluorine pump is equal to the preset maximum operating frequency, acquiring the real-time air supply temperature fed back by the second temperature sensor;
And in a preset second detection time, if the real-time air supply temperature is not less than the preset temperature suitable range, controlling the energy-saving refrigeration system to enter a refrigeration mode, stopping the first power mechanism, and starting the first compression mechanism.
The beneficial effects are that:
The invention provides an energy-saving refrigeration system, which is characterized in that air is pre-cooled by a first evaporator, and the air is further cooled by a second evaporator, so that the air supply temperature can meet the requirement of environmental comfort, and the energy-saving refrigeration system has the advantages of high temperature control precision and good temperature control effect; further, by adjusting the working states of the two compression mechanisms and the two power mechanisms, the energy-saving refrigeration system can execute various working modes, the working flexibility of the energy-saving refrigeration system is improved, the natural cold source of the power mechanisms can be fully utilized, and the energy consumption of the energy-saving refrigeration system in working is greatly reduced.
Drawings
FIG. 1 is a system configuration diagram of an energy-efficient refrigeration system provided by the present invention;
FIG. 2 is a first logic flow diagram of a control method provided by the present invention;
FIG. 3 is a second logic flow diagram of a control method provided by the present invention;
Fig. 4 is a third logic flow diagram of a control method provided by the present invention.
Description of main reference numerals: 1-first evaporator, 2-second evaporator, 31-condenser, 32-second fan, 33-second filter, 41-liquid storage tank, 42-fluorine pump, 43-second check valve, 51-oil return capillary, 52-first filter, 53-oil separator, 54-compressor, 55-first check valve, 61-dry filter, 62-electronic expansion valve, 7-first fan, 81-third temperature sensor, 82-fourth temperature sensor.
Detailed Description
The invention provides an energy-saving refrigeration system and a control method thereof, which are used for making the purposes, technical schemes and effects of the invention clearer and more definite, and the invention is further described in detail below by referring to the accompanying drawings and examples.
In the description of the present invention, it should be understood that the terms "mounted," "connected," and the like should be construed broadly, and that the specific meaning of the terms in the present invention may be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, the present invention provides an energy-saving refrigeration system, which includes a control device, a first evaporator 1, a second evaporator 2, a first condensing mechanism, a second condensing mechanism, and a first power mechanism, a first compression mechanism, a second power mechanism and a second compression mechanism which are electrically connected with the control device respectively, wherein the first evaporator 1 and the second evaporator 2 are sequentially arranged along a wind inlet and outlet direction, the first evaporator 1, the first compression mechanism and the first condensing mechanism are connected to form a first refrigeration loop, and the first evaporator 1, the first power mechanism and the first condensing mechanism are connected to form a second refrigeration loop; the second evaporator 2, the second compression mechanism and the second condensation mechanism are connected to form a third refrigeration circuit, and the second evaporator 2, the second power mechanism and the second condensation mechanism are connected to form a fourth refrigeration circuit.
The application discloses an energy-saving refrigeration system, which is characterized in that air is pre-cooled through a first evaporator 1, and the air is further cooled through a second evaporator 2, so that the air supply temperature can meet the requirement of environmental comfort, and the energy-saving refrigeration system has the advantages of high temperature control precision and good temperature control effect; further, the two evaporators are arranged in parallel front and back along the air inlet and outlet direction instead of up and down, so that the two evaporators can correspondingly connected refrigerating systems can execute different modes at the same time, namely, the working modes of the two compression mechanisms and the two power mechanisms can be flexibly adjusted, the energy-saving refrigerating system can execute various working modes, the working flexibility of the energy-saving refrigerating system is improved, the natural cold source of the power mechanism can be fully utilized, and the energy consumption of the energy-saving refrigerating system in working is greatly reduced.
Further, referring to fig. 1, the energy-saving refrigeration system further includes a first fan 7, a first temperature sensor, a second temperature sensor, a first temperature sensor and a second temperature sensor electrically connected to the control device, respectively; the first fan 7 is arranged on the air outlet side of the second evaporator 2; the first temperature sensor and the first temperature and humidity sensor are respectively arranged on the air inlet side of the first evaporator 1, the first temperature sensor is used for acquiring return air temperature, and the first temperature and humidity sensor is used for acquiring return air temperature and humidity; the second temperature sensor and the second temperature and humidity sensor are respectively arranged on the air outlet side of the first fan 7, the second temperature sensor is used for acquiring air supply temperature, and the second temperature and humidity sensor is used for acquiring air supply temperature and humidity.
In this embodiment, the first fan 7 is a centrifugal fan.
Further, referring to fig. 1, the first compression mechanism and the second compression mechanism have the same structure, the first compression mechanism includes an oil return capillary 51, a first filter 52, an oil separator 53, and a compressor 54 and a first check valve 55 that are electrically connected to the control device, respectively, an input end of the compressor 54 is connected to an output end of the first evaporator 1, an output end of the compressor 54 is connected to an input end of the oil separator 53, an output end of the oil separator 53 is connected to an input end of the first condensation mechanism, an output end of the first condensation mechanism is connected to an input end of the first check valve 55, and an output end of the first check valve 55 is connected to an input end of the first evaporator 1; the oil separator 53 is connected to an oil return end of the compressor 54 through the first filter 52 and the oil return capillary 51.
In the present embodiment, when the first compression mechanism is operated, the refrigerant evaporates in the first evaporator 1, absorbing heat of the surrounding environment, thereby lowering the temperature of the evaporator and its surrounding environment; the evaporated refrigerant gas is sucked by the compressor 54 and compressed into a high-temperature and high-pressure gas by the mechanical action of the compressor 54; the high-temperature and high-pressure refrigerant gas enters an oil separator 53, the separated lubricating oil is filtered by a first filter 52, impurities are removed, and the lubricating oil flows back to an oil return end of a compressor 54 through an oil return capillary tube 51, so that the recycling of the lubricating oil is realized; the high-temperature and high-pressure refrigerant gas subjected to oil separation enters a first condensing mechanism, heat exchange is carried out on the refrigerant gas and a cooling medium in the condenser 31, heat is released, the refrigerant gas is condensed into high-pressure liquid, the condensed high-pressure liquid flows to the first check valve 55 through a system pipeline, is throttled by a first throttling mechanism, is converted into low-temperature and low-pressure wet steam or liquid drop mixture, and then returns to the first evaporator 1, so that refrigeration cycle is realized.
Further, referring to fig. 1, the first power mechanism and the second power mechanism have the same structure, the first power mechanism includes a liquid storage tank 41, a fluorine pump 42 and a second one-way valve 43, which are electrically connected to the control device, respectively, the output end of the first evaporator 1 is connected to the input end of the second one-way valve 43, the output end of the second one-way valve 43 is connected to the input end of the first condensation mechanism, the output end of the second condensation mechanism is connected to the input end of the liquid storage tank 41, and the output end of the liquid storage tank 41 is connected to the input end of the first evaporator 1 through the fluorine pump 42.
In the present embodiment, when the first power mechanism is operated, the liquid refrigerant is pressurized from the liquid tank 41 via the fluorine pump 42 and then enters the first evaporator 1, where it absorbs heat and evaporates to become gaseous; the gaseous refrigerant then enters the first condensing mechanism through the second check valve 43, and is condensed in a liquid state by heat release in the condenser 31 included in the first condensing mechanism; finally, the liquid refrigerant returns to the liquid storage tank 41 to wait for the next circulation, so that the refrigeration cycle is realized, and the machine room return air is precooled or cooled through the phase change of the refrigerant and the heat transfer.
Further, referring to fig. 1, the first condensation mechanism and the second condensation mechanism have the same structure, the first condensation mechanism includes a condenser 31, a second fan 32, and a second filter 33, the input end of the condenser 31 is connected to the output end of the oil separator 53 and the output end of the second check valve 43, the output end of the condenser 31 is connected to the input end of the second filter 33, and the output end of the second filter 33 is connected to the input end of the liquid storage tank 41 and the input end of the first check valve 55.
In this embodiment, the second fan 32 is an axial flow fan; the first condensing mechanism further comprises a spraying part electrically connected with the control device, and the spraying part is matched with the second fan 32 and used for realizing cooling and heat release of the refrigerant in the condenser 31 and ensuring normal and orderly operation of the refrigeration cycle.
Further, referring to fig. 1, the energy-saving refrigeration system further includes a first throttling mechanism, a second throttling mechanism, a third temperature sensor 81 and a fourth temperature sensor 82 electrically connected to the control device, respectively; the third temperature sensor 81 is disposed at the output side of the first evaporator 1, and is configured to detect the temperature of the refrigerant output from the first evaporator 1; the fourth temperature sensor 82 is disposed at the output side of the second evaporator 2, and is configured to detect the temperature of the refrigerant output from the second evaporator 2; the input end of the first throttling mechanism is connected with the output end of the first compression mechanism or the output end of the first power mechanism, and the output end of the first throttling mechanism is connected with the input end of the first evaporator 1; the input end of the second throttling mechanism is connected with the output end of the second compression mechanism or the output end of the second power mechanism, and the output end of the second throttling mechanism is connected with the input end of the second evaporator 2.
Further, referring to fig. 1, the first throttle mechanism and the second throttle mechanism have the same structure, the first throttle mechanism includes a dry filter 61 and an electronic expansion valve 62, the output end of the fluorine pump 42 and the output end of the first check valve 55 are respectively connected with the input end of the dry filter 61, the output end of the dry filter 61 is connected with the input end of the electronic expansion valve 62, and the output end of the electronic expansion valve 62 is connected with the input end of the first evaporator 1.
In this embodiment, the main function of the filter drier 61 is to remove moisture, impurities, oil stains, etc. in the refrigeration system, so as to ensure the inside of the system to be clean and operate normally; the electronic expansion valve 62 automatically adjusts the opening of its valve according to the operation condition of the system and the demand of the refrigerating capacity, thereby precisely controlling the flow rate and the evaporating temperature of the refrigerant.
Referring to fig. 2 to 4, the present invention also correspondingly provides a control method of an energy-saving refrigeration system, which further includes a fifth temperature sensor for detecting an outdoor ambient temperature and a third temperature sensor 81 for detecting a temperature of the refrigerant outputted from the first evaporator 1; the control method is used for realizing the working control of the energy-saving refrigeration system, and comprises the following steps:
101. Acquiring the outdoor environment real-time temperature fed back by a fifth temperature sensor, the refrigerant real-time temperature fed back by a third temperature sensor 81, the real-time return air temperature fed back by a first temperature sensor, the real-time return air temperature and humidity fed back by the first temperature and humidity sensor and the real-time supply air temperature and humidity fed back by a second temperature and humidity sensor;
102. Calculating a first switching temperature and a second switching temperature according to the real-time temperature, the real-time return air temperature and the real-time supply air temperature and humidity of the refrigerant;
In this embodiment, the first switching temperature and the second switching temperature are calculated by a function related to a load factor, where the function of the load factor is obtained by fitting a plurality of determined sets of different outdoor temperatures with the load factor, and a curve obtained by fitting is a linear function related to the load factor; for example, a first switching temperature = refrigerant real-time temperature++ x preset wind wall load factor; wherein X is a load factor, x=actual refrigerating capacity/designed refrigerating capacity, wherein actual refrigerating capacity=enthalpy value of air supply and return air, the enthalpy value of air supply and return air can be calculated according to the real-time return air temperature and the real-time air supply temperature, and the air quantity can be calculated according to the real-time rotating speed of the first fan 7; the preset return air temperature and the preset air wall load coefficient can be preset according to design parameters of the energy-saving refrigeration system and use requirements of use scenes.
103. And comparing the first switching temperature, the second switching temperature and the outdoor environment real-time temperature, and adjusting the working state of the energy-saving refrigeration system according to the comparison result.
According to the control method of the energy-saving refrigeration system, the optimal switching temperature point is accurately calculated based on the real-time air supply temperature and the real-time load rate of the equipment, so that the system can automatically adjust the operation strategy according to different load conditions, the stability and the efficiency of equipment operation are improved, the application range of a natural mode is wider, namely, a natural cold source is more reasonably and fully utilized, and more comfortable and convenient use experience is provided for users.
Further, referring to fig. 3, the comparing the first switching temperature, the second switching temperature and the outdoor environment real-time temperature, and adjusting the working state of the energy-saving refrigeration system according to the comparison result specifically includes:
201. In a preset first detection time, if the real-time temperature of the outdoor environment is continuously less than the first switching temperature and is more than or equal to the second switching temperature, controlling the energy-saving refrigeration system to enter a mixed mode, and controlling the first power mechanism to start and the second compression mechanism to start working; at this time, the second check valve 43 of the first power mechanism is opened, and the first check valve 55 of the first compression mechanism is closed; the corresponding one-way valve of the second power mechanism is closed, and the corresponding one-way valve of the second compression mechanism is opened.
In this embodiment, the preset first detection time is 3 minutes.
In the present embodiment, when the hybrid mode is entered, the first evaporator 1, the first power mechanism, the first condensing mechanism, and the first throttle mechanism constitute a refrigeration circuit of the first evaporator 1; the second evaporator 2, the second compression mechanism, the second condensation mechanism, and the second throttle mechanism constitute a refrigeration circuit of the second evaporator 2.
202. In a preset first detection time, if the real-time temperature of the outdoor environment is continuously less than the second switching temperature, controlling the energy-saving refrigeration system to enter a natural mode, and controlling the first power mechanism and the second power mechanism to start working; at this time, the second check valve 43 of the first power mechanism is opened, and the first check valve 55 of the first compression mechanism is closed; the check valve corresponding to the second power mechanism is opened, and the check valve corresponding to the second compression mechanism is closed.
In the present embodiment, when the natural mode is entered, the first evaporator 1, the first power mechanism, the first condensing mechanism, and the first throttle mechanism constitute a refrigeration circuit of the first evaporator 1; the second evaporator 2, the second power mechanism, the second condensing mechanism and the second throttle mechanism constitute a refrigeration circuit of the second evaporator 2.
203. In a preset first detection time, if the real-time temperature of the outdoor environment is continuously higher than a first switching temperature, controlling the energy-saving refrigeration system to enter a refrigeration mode, and controlling the first compression mechanism and the second compression mechanism to start working; at this time, the second check valve 43 of the first power mechanism is closed, and the first check valve 55 of the first compression mechanism is opened; the corresponding one-way valve of the second power mechanism is closed, and the corresponding one-way valve of the second compression mechanism is opened.
In the present embodiment, when the cooling mode is entered, the first evaporator 1, the first compression mechanism, the first condensation mechanism, and the first throttle mechanism constitute a cooling circuit of the first evaporator 1; the second evaporator 2, the second compression mechanism, the second condensation mechanism, and the second throttle mechanism constitute a refrigeration circuit of the second evaporator 2.
Further, referring to fig. 4, the first power mechanism includes a liquid storage tank 41, a fluorine pump 42 and a second one-way valve 43 electrically connected to the control device, wherein an output end of the first evaporator 1 is connected to an input end of the second one-way valve 43, an output end of the second one-way valve 43 is connected to an input end of the first condensation mechanism, an output end of the second condensation mechanism is connected to an input end of the liquid storage tank 41, and an output end of the liquid storage tank 41 is connected to an input end of the first evaporator 1 through the fluorine pump 42; the control of the energy-saving refrigeration system to enter a hybrid mode specifically comprises the following steps:
301. acquiring the operating frequency of the fluorine pump 42;
302. When the operating frequency of the fluorine pump 42 is equal to the preset maximum operating frequency, acquiring the real-time air supply temperature fed back by the second temperature sensor;
303. and in a preset second detection time, if the real-time air supply temperature is not less than the preset temperature suitable range, controlling the energy-saving refrigeration system to enter a refrigeration mode, stopping the first power mechanism, and starting the first compression mechanism.
In this embodiment, the second detection time may be 3 minutes, and the preset temperature suitable range and the preset maximum operating frequency may be preset according to design parameters of the energy-saving refrigeration system and use requirements of a use scenario.
In the embodiment, when the energy-saving refrigeration system is in the natural mode, in a preset second detection time, if the real-time air supply temperature is not less than a preset temperature suitable range, controlling the energy-saving refrigeration system to enter a mixed mode; after entering the mixed mode, in a preset second detection time, if the real-time air supply temperature is not less than a preset temperature proper range, controlling the energy-saving refrigeration system to enter a refrigeration mode; when the energy-saving type refrigerating system enters the refrigerating mode, if the real-time air supply temperature is smaller than the preset temperature proper range in the preset second detection time, controlling the energy-saving type refrigerating system to enter the mixing mode; and after the hybrid mode is entered, controlling the energy-saving refrigeration system to enter a natural mode if the real-time air supply temperature is smaller than the preset temperature suitable range in the preset second detection time.
It will be understood that equivalents and modifications will occur to those skilled in the art based on the present invention and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention.
Claims (10)
1. The energy-saving refrigeration system is characterized by comprising a control device, a first evaporator, a second evaporator, a first condensing mechanism, a second condensing mechanism, a first power mechanism, a first compression mechanism, a second power mechanism and a second compression mechanism which are respectively and electrically connected with the control device, wherein the first evaporator and the second evaporator are sequentially arranged along the air inlet and outlet direction, the first evaporator, the first compression mechanism and the first condensing mechanism are connected to form a first refrigeration loop, and the first evaporator, the first power mechanism and the first condensing mechanism are connected to form a second refrigeration loop; the second evaporator, the second compression mechanism and the second condensation mechanism are connected to form a third refrigeration loop, and the second evaporator, the second power mechanism and the second condensation mechanism are connected to form a fourth refrigeration loop.
2. The energy-efficient refrigeration system according to claim 1, further comprising a first fan, a first temperature sensor, a second temperature sensor, a first temperature and humidity sensor, and a second temperature and humidity sensor electrically connected to the control device, respectively; the first fan is arranged on the air outlet side of the second evaporator; the first temperature sensor and the first temperature and humidity sensor are respectively arranged on the air inlet side of the first evaporator, the first temperature sensor is used for acquiring return air temperature, and the first temperature and humidity sensor is used for acquiring return air temperature and humidity; the second temperature sensor and the second temperature and humidity sensor set up respectively in the air-out side of first fan, second temperature sensor is used for obtaining the air supply temperature, second temperature and humidity sensor is used for obtaining the air supply humiture.
3. The energy-efficient refrigeration system according to claim 1, wherein the first compression mechanism and the second compression mechanism have the same structure, the first compression mechanism comprises an oil return capillary tube, a first filter, an oil separator, and a compressor and a first one-way valve which are electrically connected with the control device respectively, the input end of the compressor is connected with the output end of the first evaporator, the output end of the compressor is connected with the input end of the oil separator, the output end of the oil separator is connected with the input end of the first condensation mechanism, the output end of the first condensation mechanism is connected with the input end of the first one-way valve, and the output end of the first one-way valve is connected with the input end of the first evaporator; the oil separator is connected with an oil return end of the compressor through the first filter and the oil return capillary tube.
4. An energy efficient refrigeration system according to claim 3 wherein said first power mechanism and said second power mechanism are of the same construction, said first power mechanism comprising a fluid reservoir, and a fluorine pump and a second one-way valve electrically connected to said control means, respectively, said first evaporator having an output connected to said second one-way valve input, said second one-way valve having an output connected to said first condensing mechanism input, said second condensing mechanism having an output connected to said fluid reservoir input, said fluid reservoir having an output connected to said first evaporator input via said fluorine pump.
5. The energy-efficient refrigeration system according to claim 4, wherein the first condensing mechanism and the second condensing mechanism are identical in structure, the first condensing mechanism comprises a condenser, a second fan and a second filter, the input end of the condenser is connected with the output end of the oil separator and the output end of the second check valve respectively, the output end of the condenser is connected with the input end of the second filter, and the output end of the second filter is connected with the input end of the liquid storage tank and the input end of the first check valve respectively.
6. The energy efficient refrigeration system as recited in claim 4 further comprising a first throttle mechanism, a second throttle mechanism, a third temperature sensor, and a fourth temperature sensor electrically connected to said control device, respectively; the third temperature sensor is arranged on the output side of the first evaporator and is used for detecting the temperature of the refrigerant output by the first evaporator; the fourth temperature sensor is arranged on the output side of the second evaporator and is used for detecting the temperature of the refrigerant output by the second evaporator; the input end of the first throttling mechanism is connected with the output end of the first compression mechanism or the output end of the first power mechanism, and the output end of the first throttling mechanism is connected with the input end of the first evaporator; the input end of the second throttling mechanism is connected with the output end of the second compression mechanism or the output end of the second power mechanism, and the output end of the second throttling mechanism is connected with the input end of the second evaporator.
7. The energy efficient refrigeration system according to claim 6, wherein the first throttle mechanism and the second throttle mechanism are identical in structure, the first throttle mechanism includes a dry filter and an electronic expansion valve, the output end of the fluorine pump and the output end of the first check valve are respectively connected with the input end of the dry filter, the output end of the dry filter is connected with the input end of the electronic expansion valve, and the output end of the electronic expansion valve is connected with the input end of the first evaporator.
8. A control method of an energy-saving refrigeration system, characterized in that the energy-saving refrigeration system further comprises a fifth temperature sensor for detecting the outdoor environment temperature and a third temperature sensor for detecting the temperature of the refrigerant output by the first evaporator; the control method is used for realizing the working control of the energy-saving refrigeration system as claimed in any one of claims 2 to 7, and comprises the following steps:
Acquiring outdoor environment real-time temperature fed back by a fifth temperature sensor, refrigerant real-time temperature fed back by a third temperature sensor, real-time return air temperature fed back by a first temperature sensor, real-time return air temperature and humidity fed back by a first temperature and humidity sensor and real-time supply air temperature and humidity fed back by a second temperature and humidity sensor;
Calculating a first switching temperature and a second switching temperature according to the real-time temperature, the real-time return air temperature and the real-time supply air temperature and humidity of the refrigerant;
And comparing the first switching temperature, the second switching temperature and the outdoor environment real-time temperature, and adjusting the working state of the energy-saving refrigeration system according to the comparison result.
9. The method for controlling an energy-saving refrigeration system according to claim 8, wherein comparing the first switching temperature, the second switching temperature and the outdoor environment real-time temperature, and adjusting the operation state of the energy-saving refrigeration system according to the comparison result, specifically comprises:
in a preset first detection time, if the real-time temperature of the outdoor environment is continuously less than the first switching temperature and is more than or equal to the second switching temperature, controlling the energy-saving refrigeration system to enter a mixed mode, and controlling the first power mechanism to start and the second compression mechanism to start working;
In a preset first detection time, if the real-time temperature of the outdoor environment is continuously less than the second switching temperature, controlling the energy-saving refrigeration system to enter a fluorine pump mode, and controlling the first power mechanism and the second power mechanism to start working;
and in a preset first detection time, if the real-time temperature of the outdoor environment is continuously higher than the first switching temperature, controlling the energy-saving refrigeration system to enter a refrigeration mode, and controlling the first compression mechanism and the second compression mechanism to start working.
10. The method of claim 9, wherein the first power mechanism comprises a liquid storage tank, a fluorine pump and a second one-way valve, wherein the fluorine pump and the second one-way valve are respectively electrically connected with the control device, the output end of the first evaporator is connected with the input end of the second one-way valve, the output end of the second one-way valve is connected with the input end of the first condensing mechanism, the output end of the second condensing mechanism is connected with the input end of the liquid storage tank, and the output end of the liquid storage tank is connected with the input end of the first evaporator through the fluorine pump; the control of the energy-saving refrigeration system to enter a hybrid mode specifically comprises the following steps:
Acquiring the operating frequency of a fluorine pump;
When the operating frequency of the fluorine pump is equal to the preset maximum operating frequency, acquiring the real-time air supply temperature fed back by the second temperature sensor;
And in a preset second detection time, if the real-time air supply temperature is not less than the preset temperature suitable range, controlling the energy-saving refrigeration system to enter a refrigeration mode, stopping the first power mechanism, and starting the first compression mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411123216.7A CN119022519A (en) | 2024-08-15 | 2024-08-15 | Energy-saving refrigeration system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411123216.7A CN119022519A (en) | 2024-08-15 | 2024-08-15 | Energy-saving refrigeration system and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119022519A true CN119022519A (en) | 2024-11-26 |
Family
ID=93540057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411123216.7A Pending CN119022519A (en) | 2024-08-15 | 2024-08-15 | Energy-saving refrigeration system and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119022519A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556201A (en) * | 2016-10-27 | 2017-04-05 | 青岛海尔特种电冰柜有限公司 | Double loop separating refrigerating equipment |
| EP3511648A1 (en) * | 2018-01-11 | 2019-07-17 | Carrier Corporation | Refrigeration system and the control method thereof |
| CN114923239A (en) * | 2022-05-16 | 2022-08-19 | 广东申菱环境系统股份有限公司 | A compressor and fluorine pump compound air conditioning system and its control method |
| CN115264978A (en) * | 2022-07-06 | 2022-11-01 | 中国电信股份有限公司 | A dual refrigeration combined fluorine pump circulating refrigeration system and its control method |
| CN116182336A (en) * | 2021-11-26 | 2023-05-30 | 维谛技术有限公司 | An air-conditioning unit, its operation control method, and operation control device |
-
2024
- 2024-08-15 CN CN202411123216.7A patent/CN119022519A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556201A (en) * | 2016-10-27 | 2017-04-05 | 青岛海尔特种电冰柜有限公司 | Double loop separating refrigerating equipment |
| EP3511648A1 (en) * | 2018-01-11 | 2019-07-17 | Carrier Corporation | Refrigeration system and the control method thereof |
| CN116182336A (en) * | 2021-11-26 | 2023-05-30 | 维谛技术有限公司 | An air-conditioning unit, its operation control method, and operation control device |
| CN114923239A (en) * | 2022-05-16 | 2022-08-19 | 广东申菱环境系统股份有限公司 | A compressor and fluorine pump compound air conditioning system and its control method |
| CN115264978A (en) * | 2022-07-06 | 2022-11-01 | 中国电信股份有限公司 | A dual refrigeration combined fluorine pump circulating refrigeration system and its control method |
Non-Patent Citations (1)
| Title |
|---|
| 田长青 等: "《新能源汽车关键技术研发系列 新能源汽车热系统》", 31 January 2024, 机械工业出版社, pages: 50 - 51 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100552312C (en) | Air Conditioning Unit Device and Air Treatment Method for Heat and Humidity Sectional Treatment | |
| CN102359738B (en) | Heat pipe and refrigerating system combined energy transportation method | |
| CN105042929B (en) | Three-mode compound chiller and its control method | |
| CN110410904A (en) | A kind of densification and high performance humiture independence control air conditioner system | |
| RU2614417C2 (en) | Cooling system | |
| CN114923239A (en) | A compressor and fluorine pump compound air conditioning system and its control method | |
| CN108759138B (en) | Operation method and system of secondary throttling middle incomplete cooling refrigerating system | |
| CN105571198B (en) | A kind of high-efficiency refrigerating system based on cold-storage supercooling | |
| CN111678198A (en) | High-energy-efficiency-ratio machine room air conditioning system | |
| CN113446756A (en) | Four-pipe air source heat pump unit with variable-speed compressor | |
| CN105758045A (en) | Ultralow-temperature overlapped triple generation heat pump unit | |
| WO2011085527A1 (en) | Integrated heat pump unit utilizing air energy and water source | |
| CN107120757A (en) | It is a kind of to be combined the heat recovery type fresh air conditioner group constituted by three refrigerant circulations | |
| CN117006560A (en) | Water-cooling integrated water chilling unit with natural cooling function and control method | |
| CN209386597U (en) | A magnetic levitation multi-connected air conditioner unit | |
| CN208832629U (en) | A kind of low-temperature cold water unit | |
| CN112923594B (en) | Magnetic suspension evaporation cold direct expansion unit and control method thereof | |
| CN205783233U (en) | A kind of ultra low temperature overlapping formula heating unit | |
| CN204478368U (en) | With the free refrigeration type evaporative condenser handpiece Water Chilling Units of pressure maintenance device | |
| CN103344059B (en) | Secondary throttling middle complete cooling variable flow two-stage compression refrigerating system | |
| CN112503664A (en) | Indirect evaporation cold and hot pipe dual-power combined system and control method | |
| CN203533948U (en) | Compound type evaporative type cooling device having natural cooling function and used for large-scale device | |
| CN118582828A (en) | Condensate cooling device, air conditioning system and condensate cooling control method thereof | |
| CN119022519A (en) | Energy-saving refrigeration system and control method thereof | |
| CN212109083U (en) | an air conditioning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |