CN107166588A - A kind of humiture independence control air conditioner system of utilization high temperature cold water precooling - Google Patents
A kind of humiture independence control air conditioner system of utilization high temperature cold water precooling Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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- 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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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- 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
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- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F2003/144—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only
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Abstract
本发明涉及一种利用高温冷水预冷的温湿度独立控制空调系统，它包括高温制冷站、显热末端和空气除湿处理单元，其中所述显热末端和所述空气除湿处理单元设置在室内，所述高温制冷站包括高温冷水机组和冷冻水泵；所述空气除湿处理单元包括预冷表冷器、蒸发器、压缩机、水冷表冷器和节流阀，所述蒸发器、压缩机、水冷表冷器和所述节流阀依次连接构成制冷剂循环回路，所述预冷表冷器和所述蒸发器依次置于待除湿空气通道上，所述高温冷水机组通过所述冷冻水泵分别与所述显热末端、预冷表冷器、水冷表冷器连接，所述显热末端、预冷表冷器和水冷表冷器的回水管路与所述高温冷水机组连接。
The present invention relates to a temperature and humidity independent control air conditioning system utilizing high-temperature cold water precooling, which includes a high-temperature refrigeration station, a sensible heat terminal and an air dehumidification processing unit, wherein the sensible heat terminal and the air dehumidification processing unit are arranged indoors, The high-temperature refrigeration station includes a high-temperature chiller and a chilled water pump; the air dehumidification processing unit includes a pre-cooling surface cooler, an evaporator, a compressor, a water-cooled surface cooler and a throttle valve, and the evaporator, compressor, water-cooling The surface cooler and the throttle valve are sequentially connected to form a refrigerant circulation circuit, the precooling surface cooler and the evaporator are sequentially placed on the air channel to be dehumidified, and the high-temperature chiller is connected with the chilled water pump respectively. The sensible heat terminal, the pre-cooling surface cooler and the water-cooling surface cooler are connected, and the return water pipelines of the sensible heat terminal, the pre-cooling surface cooler and the water-cooling surface cooler are connected to the high-temperature chiller.
Description
技术领域technical field
本发明涉及一种利用高温冷水预冷的温湿度独立控制空调系统，属于空调技术领域。The invention relates to an air-conditioning system for independent temperature and humidity control by using high-temperature cold water for precooling, and belongs to the technical field of air-conditioning.
背景技术Background technique
建筑室内热湿环境的调控过程包含对室内温度、湿度的调控两个方面，常规空调系统通常利用单一冷源来同时实现对温度、湿度的调控，会带来能量利用品位损失，并且会因无法适应室内显热负荷、湿负荷的逐时变化而无法实现建筑热湿环境的有效调控。作为一种新型空调系统形式，温湿度独立控制空调系统利用不同的手段分别调节室内温度、湿度：通过送入干燥的空气来承担室内湿负荷、调节湿度，通过高温冷水或冷媒等来调节室内温度。这种空调方式可以更好地完成对室内温度、湿度的调节任务，在有效实现建筑热湿环境调控的同时还能实现很好的节能效果。在温湿度独立控制空调系统中，承担温度控制任务所需的高温冷水温度或冷媒温度一般在16～18℃左右，这时所需压缩制冷方式的冷源蒸发温度就可以远高于常规冷凝除湿方式对应的蒸发温度，制冷系统能效可以获得很大提高。目前已有多种形式的高温冷水机组，可以满足不同场合对高温冷水的需求，为温湿度独立控制空调系统的推广和应用提供了重要技术支撑。如何更好地发挥高温冷水能效水平较高、尽可能多地利用高温冷水来作为冷源，是进一步提升温湿度独立控制空调系统能效的重要途径。The regulation process of the indoor thermal and humid environment of buildings includes the regulation of indoor temperature and humidity. Conventional air-conditioning systems usually use a single cold source to realize the regulation of temperature and humidity at the same time. Adapting to the hourly changes of indoor sensible heat load and humidity load cannot achieve effective regulation of the building's thermal and humid environment. As a new form of air conditioning system, the temperature and humidity independent control air conditioning system uses different means to adjust the indoor temperature and humidity: by sending dry air to bear the indoor humidity load and adjust the humidity, and by using high temperature cold water or refrigerant to adjust the indoor temperature . This air-conditioning method can better complete the task of regulating indoor temperature and humidity, and can achieve good energy-saving effects while effectively regulating the building's thermal and humid environment. In the air-conditioning system with independent temperature and humidity control, the high-temperature cold water temperature or refrigerant temperature required for temperature control tasks is generally around 16-18°C. At this time, the evaporation temperature of the cold source in the compression refrigeration method can be much higher than that of conventional condensation dehumidification. The evaporation temperature corresponding to the method can greatly improve the energy efficiency of the refrigeration system. At present, there are various forms of high-temperature chillers, which can meet the needs of high-temperature cold water in different occasions, and provide important technical support for the promotion and application of air-conditioning systems with independent temperature and humidity control. How to make better use of the high energy efficiency of high-temperature cold water and use high-temperature cold water as a cooling source as much as possible is an important way to further improve the energy efficiency of the air-conditioning system with independent temperature and humidity control.
另一方面，湿度控制是空调系统的重要任务，冷凝除湿方法是温湿度独立控制空调系统中湿度控制系统的可选方法。近年来，为了进一步提高冷凝除湿方法的能效水平，已有利用高温冷水对待除湿空气进行预冷、利用低温冷水或低温制冷剂对空气进一步除湿的空气处理流程。但在上述空气除湿处理流程中，采用低温冷水进一步除湿时，需要系统设置单独的低温冷水机组及相应的冷水管路，此时系统中就会存在两套冷水管路，系统复杂程度大幅增加；采用低温制冷剂冷凝除湿时，需要对独立热泵循环的冷凝排热方式进行统一考虑，通常需设置单独的冷却水管路排热或利用风冷冷却方式进行排热，前者增加了系统复杂程度，后者则限制了系统能效水平。因此，如何进一步提升冷凝除湿处理过程的性能、降低系统复杂程度，是进一步优化湿度处理系统需解答的重要问题。On the other hand, humidity control is an important task of the air conditioning system, and the condensation dehumidification method is an optional method for the humidity control system in the temperature and humidity independent control air conditioning system. In recent years, in order to further improve the energy efficiency level of the condensation dehumidification method, there have been air treatment processes that use high-temperature cold water to pre-cool the air to be dehumidified, and use low-temperature cold water or low-temperature refrigerant to further dehumidify the air. However, in the above-mentioned air dehumidification process, when low-temperature cold water is used for further dehumidification, a separate low-temperature chiller and corresponding cold water pipelines need to be installed in the system. At this time, there will be two sets of cold water pipelines in the system, and the complexity of the system will increase greatly; When low-temperature refrigerant is used to condense and dehumidify, it is necessary to uniformly consider the condensing heat removal method of the independent heat pump cycle. Usually, it is necessary to set up a separate cooling water pipeline or use air-cooled cooling to remove heat. The former increases the complexity of the system, and the latter increases the complexity of the system. The latter limits the energy efficiency level of the system. Therefore, how to further improve the performance of the condensation dehumidification treatment process and reduce the complexity of the system is an important issue to be answered in further optimizing the humidity treatment system.
发明内容Contents of the invention
针对背景技术中存在的问题，本发明的目的在于提供一种利用高温冷水预冷的温湿度独立控制空调系统，该空调系统具有更优的处理能效，并且管路简化、系统复杂程度低。In view of the problems existing in the background technology, the purpose of the present invention is to provide an air conditioning system with independent temperature and humidity control using high temperature cold water precooling. The air conditioning system has better processing energy efficiency, simplified pipelines and low system complexity.
为实现上述目的，本发明采用以下技术方案：一种利用高温冷水预冷的温湿度独立控制空调系统，其特征在于：包括高温制冷站、显热末端和空气除湿处理单元，所述显热末端和所述空气除湿处理单元设置在室内，所述高温制冷站包括高温冷水机组和冷冻水泵；所述空气除湿处理单元包括预冷表冷器、蒸发器、压缩机、水冷表冷器和节流阀，所述蒸发器、压缩机、水冷表冷器和所述节流阀依次连接构成制冷剂循环回路，所述预冷表冷器和所述蒸发器依次置于待除湿空气通道上，所述高温冷水机组通过所述冷冻水泵分别与所述显热末端、预冷表冷器、水冷表冷器连接，所述显热末端、预冷表冷器和水冷表冷器的回水管路与所述高温冷水机组连接。In order to achieve the above object, the present invention adopts the following technical solutions: an air-conditioning system with independent temperature and humidity control using high-temperature cold water precooling, characterized in that it includes a high-temperature refrigeration station, a sensible heat terminal and an air dehumidification processing unit, and the sensible heat terminal and the air dehumidification processing unit is arranged indoors, and the high-temperature refrigeration station includes a high-temperature chiller and a chilled water pump; the air dehumidification processing unit includes a pre-cooling surface cooler, an evaporator, a compressor, a water-cooling surface cooler and a throttle valve, the evaporator, compressor, water-cooled surface cooler and the throttle valve are sequentially connected to form a refrigerant circulation loop, and the pre-cooling surface cooler and the evaporator are sequentially placed on the air channel to be dehumidified. The high-temperature water chiller is respectively connected to the sensible heat end, the pre-cooling surface cooler, and the water-cooling surface cooler through the chilled water pump, and the return water pipelines of the sensible heat end, the pre-cooling surface cooler, and the water-cooling surface cooler are connected to the The high temperature chiller is connected.
所述显热末端为多个，分散设置在室内。There are multiple sensible heat terminals, which are distributed indoors.
所述空气除湿处理单元为多个，分散设置在室内。There are multiple air dehumidification processing units scattered indoors.
所述显热末端为干式风机盘管或辐射板。The sensible heat end is a dry fan coil unit or a radiant panel.
所述蒸发器中预设有液态制冷剂。Liquid refrigerant is preset in the evaporator.
本发明由于采取以上技术方案，其具有以下优点：1、本发明高温冷水机组中的高温冷水流入显热末端、预冷表冷器和水冷表冷器中，分别与室内空气或壁面、待除湿空气、制冷剂蒸气换热后变为高温冷水回水，然后都流回高温冷水机组，完成高温冷水的循环过程，整个系统内只设置一套高温冷水管路，实现了除湿和除热的有效结合，共同构成了一种高效的温湿度独立控制空调系统。2、本发明高温制冷站中的高温冷水机组与显热末端和预冷表冷器连接，高温冷水进入显热末端和预冷表冷器中，因此显热末端和预冷表冷器与室内空气、壁面等进行换热，得以调节室内温度。3、本发明制冷剂循环回路包括蒸发器、压缩机、水冷表冷器，蒸发器中预设有液态制冷剂，蒸发器与压缩机连接，压缩机与水冷表冷器连接，水冷表冷器与蒸发器连接，蒸发器室内的待除湿空气换热将待除湿空气中的水汽冷凝，蒸发器中的液态制冷剂受热后变为制冷剂蒸气进入压缩机，制冷剂蒸气经压缩机压缩后进入水冷表冷器中冷凝，冷凝后的液态制冷剂流入蒸发器中完成热泵循环，因此制冷剂循环回路对待除湿空气进行除湿处理，得以调节室内湿度。4、本发明中高温冷水机组与水冷表冷器连接，高温冷水流入水冷表冷器，带走水冷表冷器中的液态制冷剂的热量使得制冷剂循环回路能够正常运转，因此优化处理能效、简化管路、降低系统复杂程度，实现空调系统高效运行。5、本发明空气除湿处理单元包括预冷表冷器和制冷剂循环回路，待除湿空气经过预冷表冷器预冷后，再进入制冷剂循环回路中除湿，因此本发明的除湿效果好。6、本发明显热末端可为干式风机盘管或辐射板，因此显热末端中高温冷水与室内空气或室内高温壁面可实现有效换热，能有效排除室内热量。The present invention has the following advantages due to the adoption of the above technical scheme: 1. The high-temperature cold water in the high-temperature water chiller of the present invention flows into the sensible heat terminal, the pre-cooling surface cooler and the water-cooling surface cooler, and is respectively connected with the indoor air or the wall surface to be dehumidified. The air and refrigerant vapor turn into high-temperature cold water return water after heat exchange, and then flow back to the high-temperature chiller to complete the circulation process of high-temperature cold water. Only one set of high-temperature cold water pipelines is set in the entire system to achieve effective dehumidification and heat removal. Combined, they constitute an efficient temperature and humidity independent control air conditioning system. 2. The high-temperature chiller in the high-temperature refrigeration station of the present invention is connected with the sensible heat terminal and the pre-cooling surface cooler, and the high-temperature cold water enters the sensible heat terminal and the pre-cooling surface cooler, so the sensible heat terminal and the pre-cooling surface cooler are connected to the indoor Air, wall, etc. conduct heat exchange to adjust the indoor temperature. 3. The refrigerant circulation circuit of the present invention includes an evaporator, a compressor, and a water-cooled surface cooler. The evaporator is preset with a liquid refrigerant, the evaporator is connected to the compressor, the compressor is connected to the water-cooled surface cooler, and the water-cooled surface cooler Connected with the evaporator, the heat exchange of the air to be dehumidified in the evaporator room will condense the water vapor in the air to be dehumidified, and the liquid refrigerant in the evaporator will become refrigerant vapor after being heated and enter the compressor, and the refrigerant vapor will enter after being compressed by the compressor. The water-cooled surface cooler is condensed, and the condensed liquid refrigerant flows into the evaporator to complete the heat pump cycle. Therefore, the refrigerant circulation circuit dehumidifies the dehumidified air to adjust the indoor humidity. 4. In the present invention, the high-temperature water chiller is connected with the water-cooled surface cooler, and the high-temperature cold water flows into the water-cooled surface cooler to take away the heat of the liquid refrigerant in the water-cooled surface cooler so that the refrigerant circulation circuit can operate normally, thus optimizing the treatment energy efficiency, Simplify the pipeline, reduce the complexity of the system, and realize the efficient operation of the air conditioning system. 5. The air dehumidification processing unit of the present invention includes a pre-cooling surface cooler and a refrigerant circulation circuit. After the dehumidified air is pre-cooled by the pre-cooling surface cooler, it enters the refrigerant circulation circuit for dehumidification, so the dehumidification effect of the present invention is good. 6. The sensible heat end of the present invention can be a dry fan coil unit or a radiant plate, so the high-temperature cold water in the sensible heat end can achieve effective heat exchange with the indoor air or the high-temperature indoor wall surface, and can effectively remove indoor heat.
附图说明Description of drawings
图1是本发明的工作原理图。Fig. 1 is a working principle diagram of the present invention.
具体实施方式detailed description
下面结合附图和实施例对本发明进行详细的描述。The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
如图1所示，本发明包括高温制冷站A、显热末端1和空气除湿处理单元B，其中显热末端1和空气除湿处理单元B设置在室内。高温制冷站A包括高温冷水机组2和冷冻水泵3。空气除湿处理单元B包括预冷表冷器4、蒸发器5、压缩机6、水冷表冷器7和节流阀8。其中，蒸发器5、压缩机6、水冷表冷器7和节流阀8依次连接构成制冷剂循环回路；预冷表冷器4和蒸发器5依次置于待除湿空气通道上。高温冷水机组2通过冷冻水泵3分别与显热末端1、预冷表冷器4、水冷表冷器7连接，显热末端1、预冷表冷器4和水冷表冷器7的回水管路与高温冷水机组2连接。As shown in Figure 1, the present invention includes a high-temperature refrigeration station A, a sensible heat terminal 1 and an air dehumidification processing unit B, wherein the sensible heat terminal 1 and the air dehumidification processing unit B are arranged indoors. The high-temperature refrigeration station A includes a high-temperature chiller 2 and a chilled water pump 3 . The air dehumidification processing unit B includes a pre-cooling surface cooler 4 , an evaporator 5 , a compressor 6 , a water-cooling surface cooler 7 and a throttle valve 8 . Among them, the evaporator 5, the compressor 6, the water-cooled surface cooler 7 and the throttle valve 8 are sequentially connected to form a refrigerant circulation loop; the pre-cooling surface cooler 4 and the evaporator 5 are sequentially placed on the air channel to be dehumidified. The high-temperature chiller 2 is respectively connected to the sensible heat end 1, the pre-cooling surface cooler 4, and the water-cooling surface cooler 7 through the chilled water pump 3, and the return water pipelines of the sensible heat end 1, the pre-cooling surface cooler 4, and the water-cooling surface cooler 7 Connect with high temperature chiller 2.
上述实施例中，显热末端1为多个并联分散设置在室内，能够满足多个末端的需求。In the above embodiment, multiple sensible heat terminals 1 are arranged in parallel and distributed indoors, which can meet the requirements of multiple terminals.
上述实施例中，空气除湿处理单元B为多个并联分散设置在室内，能够有效满足室内湿度调节需求。In the above embodiments, the air dehumidification processing units B are arranged in parallel and distributed indoors, which can effectively meet the indoor humidity adjustment requirements.
上述实施例中，显热末端1为干式风机盘管或辐射板。In the above embodiments, the sensible heat terminal 1 is a dry fan coil unit or a radiant panel.
上述实施例中，蒸发器5中预设有液态制冷剂。In the above embodiments, liquid refrigerant is preset in the evaporator 5 .
本发明的工作原理如下：The working principle of the present invention is as follows:
冷冻水泵3将高温冷水输送到显热末端1、预冷表冷器4和水冷表冷器7中，显热末端1与室内空气、壁面等进行换热得以调节室内温度，显热末端1中的高温冷水回水流入高温冷水机组2进行制冷，预冷表冷器4将待除湿空气进行预冷处理，预冷表冷器4中的高温冷水回水流入高温冷水机组2进行制冷，蒸发器5中预设有液态制冷剂，蒸发器5与室内的待除湿空气换热，将待除湿空气中的水汽冷凝，蒸发器5中的液态制冷剂受热后变为制冷剂蒸气进入压缩机6，制冷剂蒸气经压缩机6压缩后进入水冷表冷器7中冷凝，冷凝后的制冷剂经由节流阀8节流后流入蒸发器5，至此完成热泵循环。进一步地，冷冻水泵3的输出端与制冷剂循环回路6中的水冷表冷器7连接，高温冷水机组2中的高温冷水通过冷冻水泵3进入水冷表冷器7中与制冷剂蒸气进行换热，使制冷剂蒸气冷凝，使得蒸发器5能够正常使用；水冷表冷器7的回水管路与高温冷水机组2连接，将水冷表冷器7中的高温冷水回水流入高温冷水机组2进行制冷。The chilled water pump 3 transports high-temperature cold water to the sensible heat end 1, the pre-cooling surface cooler 4 and the water-cooled surface cooler 7. The sensible heat end 1 exchanges heat with the indoor air and the wall to adjust the indoor temperature, and the sensible heat end 1 The high-temperature cold water return water flows into the high-temperature chiller 2 for refrigeration, the pre-cooling surface cooler 4 pre-cools the air to be dehumidified, the high-temperature cold water return water in the pre-cooling surface cooler 4 flows into the high-temperature chiller 2 for refrigeration, and the evaporator 5 A liquid refrigerant is preset in the middle, and the evaporator 5 exchanges heat with the indoor air to be dehumidified, and condenses the water vapor in the air to be dehumidified. The refrigerant vapor is compressed by the compressor 6 and enters the water-cooled surface cooler 7 to condense, and the condensed refrigerant flows into the evaporator 5 after being throttled by the throttle valve 8, thus completing the heat pump cycle. Further, the output end of the chilled water pump 3 is connected to the water-cooled surface cooler 7 in the refrigerant circulation circuit 6, and the high-temperature chilled water in the high-temperature chiller 2 enters the water-cooled surface cooler 7 through the chilled water pump 3 to exchange heat with the refrigerant vapor , to condense the refrigerant vapor, so that the evaporator 5 can be used normally; the return water pipeline of the water-cooled surface cooler 7 is connected to the high-temperature chiller 2, and the high-temperature cold water return water in the water-cooled surface cooler 7 flows into the high-temperature chiller 2 for refrigeration .
上述各实施例仅用于对本发明的目的、技术方案和有益效果进行了进一步详细说明，并不用于限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above-mentioned embodiments are only used to further describe the purpose, technical solutions and beneficial effects of the present invention in detail, and are not intended to limit the present invention. Any modifications, equivalent replacements, Improvements and the like should all be included within the protection scope of the present invention.
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