CN110173913A - A kind of steam compressed high temperature heat pump unit of very large super cooling degree - Google Patents
A kind of steam compressed high temperature heat pump unit of very large super cooling degree Download PDFInfo
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- CN110173913A CN110173913A CN201910334133.5A CN201910334133A CN110173913A CN 110173913 A CN110173913 A CN 110173913A CN 201910334133 A CN201910334133 A CN 201910334133A CN 110173913 A CN110173913 A CN 110173913A
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- 238000004781 supercooling Methods 0.000 title abstract description 6
- 239000003507 refrigerant Substances 0.000 claims abstract description 267
- 239000007788 liquid Substances 0.000 claims abstract description 90
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000007906 compression Methods 0.000 claims abstract description 46
- 230000006835 compression Effects 0.000 claims abstract description 45
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 238000000926 separation method Methods 0.000 claims abstract description 14
- 239000003921 oil Substances 0.000 claims description 72
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 239000010687 lubricating oil Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000005057 refrigeration Methods 0.000 claims description 3
- 210000003437 trachea Anatomy 0.000 claims 3
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000001704 evaporation Methods 0.000 abstract description 4
- 230000008020 evaporation Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 26
- 238000000034 method Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- MSSNHSVIGIHOJA-UHFFFAOYSA-N pentafluoropropane Chemical compound FC(F)CC(F)(F)F MSSNHSVIGIHOJA-UHFFFAOYSA-N 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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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
- 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
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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
- F25B6/00—Compression machines, plants or systems, with several condenser circuits
- F25B6/04—Compression machines, plants or systems, with several condenser circuits arranged in series
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
本发明涉及超大过冷度的蒸气压缩高温热泵机组，主要结构包括压缩机或喷气增焓压缩机，蒸发器，冷凝器，经济器，阀前冷却器，气液分离器，油分离器，油过滤器，电子膨胀阀，气管接口，液管接口，水管进口，水管出口，加热空气进口，加热空气出口，制冷剂连接管，回油管，水管，风管，吸气回热器等，其中经济器与吸气回热器不是必须的。本发明系统产生超大过冷度，可以显著降低阀前温度，从而保证膨胀阀在安全范围内运行；超大过冷度可以减小制冷剂进入蒸发器的干度，从而有利于分液，加强蒸发器的换热效果；超大过冷度使单位质量流量制冷剂的制冷量增加，因此在相同制冷量条件下大过冷度系统经过蒸发器的制冷剂流量减少，有利于降低制冷剂压降。
The invention relates to a vapor compression high-temperature heat pump unit with a super-large subcooling degree. Filter, electronic expansion valve, air pipe interface, liquid pipe interface, water pipe inlet, water pipe outlet, heating air inlet, heating air outlet, refrigerant connection pipe, oil return pipe, water pipe, air pipe, suction regenerator, etc., among which the economy Regenerator and suction regenerator are not necessary. The system of the present invention produces a super-large supercooling degree, which can significantly reduce the temperature in front of the valve, thereby ensuring that the expansion valve operates within a safe range; the super-large supercooling degree can reduce the dryness of the refrigerant entering the evaporator, thereby facilitating liquid separation and enhancing evaporation The heat exchange effect of the evaporator; the ultra-large subcooling degree increases the cooling capacity of the refrigerant per unit mass flow rate, so under the same cooling capacity, the refrigerant flow rate of the system with a large subcooling degree passing through the evaporator is reduced, which is conducive to reducing the pressure drop of the refrigerant.
Description
技术领域technical field
本发明涉及一种高温热泵机组，尤其涉及一种超大过冷度的蒸气压缩高温热泵机组。The invention relates to a high-temperature heat pump unit, in particular to a vapor compression high-temperature heat pump unit with a super-large degree of subcooling.
背景技术Background technique
热泵技术是近年来在全世界倍受关注的新能源技术，它可以从低温热源吸取热量，使低品位热能转化为高品位热能，从而获得比输入能更多的输出热能。Heat pump technology is a new energy technology that has attracted much attention in the world in recent years. It can absorb heat from low-temperature heat sources and convert low-grade heat energy into high-grade heat energy, thereby obtaining more output heat energy than input energy.
高温热泵是将工业企业排放、浪费的中低温度的废水、废气中的热量通过高温热能热泵进行收集，转换成高温的水或高温蒸汽，用于工业工艺或供暖使用，可直接替代传统燃煤锅炉，是实现工业节能、降耗提效的最佳选择。The high-temperature heat pump is to collect the heat in the middle and low temperature wastewater and waste gas discharged and wasted by industrial enterprises through a high-temperature heat energy heat pump, and convert it into high-temperature water or high-temperature steam for use in industrial processes or heating, and can directly replace traditional coal-fired Boilers are the best choice for industrial energy saving, consumption reduction and efficiency improvement.
目前常见的高温热泵机组，制冷剂从低品位的水源或空气源中吸收热量，采用单级压缩，直接压缩至高压(冷凝温度超过100℃)，系统压比大，排气温度过高。除此之外，市场上普通电子膨胀阀的耐受温度只有60℃左右，如果采用常规的热泵机组，不易产生如此之大的过冷度，会导致阀前温度超限。At present, the common high-temperature heat pump unit, the refrigerant absorbs heat from low-grade water or air source, adopts single-stage compression, and directly compresses to high pressure (condensing temperature exceeds 100°C), the system pressure ratio is large, and the exhaust temperature is too high. In addition, the tolerance temperature of ordinary electronic expansion valves on the market is only about 60°C. If a conventional heat pump unit is used, it is not easy to produce such a large degree of subcooling, which will cause the temperature in front of the valve to exceed the limit.
发明内容Contents of the invention
为了使热泵机组满足一定的高温要求(送风温度100℃至120℃)，同时降低排气温度，提升热泵机组的制热能力，并保证电子膨胀阀在安全范围(常规阀耐受温度60℃左右)内运行，本发明提出了一种超大过冷度的蒸气压缩高温热泵机组。In order to make the heat pump unit meet certain high temperature requirements (supply air temperature 100°C to 120°C), reduce the exhaust temperature at the same time, improve the heating capacity of the heat pump unit, and ensure that the electronic expansion valve is within a safe range (the tolerance temperature of the conventional valve is 60°C) Left and right), the present invention proposes a vapor compression high-temperature heat pump unit with a super-large degree of subcooling.
本发明的目的可以通过以下技术方案来实现：The purpose of the present invention can be achieved through the following technical solutions:
本发明提供第一种超大过冷度的蒸气压缩高温热泵机组。The invention provides the first vapor compression high-temperature heat pump unit with super-large subcooling degree.
一种超大过冷度的蒸气压缩高温热泵机组，包括压缩机、蒸发器、冷凝器、阀前冷却器、气液分离器、油分离器、电子膨胀阀、气管接口、液管接口、水管进口、水管出口、加热空气进口、加热空气出口，A vapor compression high-temperature heat pump unit with a super-large subcooling degree, including a compressor, an evaporator, a condenser, a pre-valve cooler, a gas-liquid separator, an oil separator, an electronic expansion valve, a gas pipe connection, a liquid pipe connection, and a water pipe inlet , water pipe outlet, heated air inlet, heated air outlet,
所述冷凝器包括高温冷凝器和低温冷凝器，高温冷凝器和低温冷凝器均为制冷剂-空气换热器，具备制冷剂通道和空气通道；The condenser includes a high-temperature condenser and a low-temperature condenser, both of which are refrigerant-air heat exchangers with refrigerant passages and air passages;
所述高温冷凝器和低温冷凝器的制冷剂通道通过制冷剂连接管依次连通，并与气管接口和液管接口连通，所述高温冷凝器和低温冷凝器的空气通道通过风管依次连通，并与加热空气进口和加热空气出口连通；The refrigerant passages of the high-temperature condenser and the low-temperature condenser are connected in sequence through the refrigerant connecting pipe, and communicate with the gas pipe interface and the liquid pipe interface, and the air passages of the high-temperature condenser and the low-temperature condenser are connected in sequence through the air pipe, and communicate with the heated air inlet and the heated air outlet;
所述蒸发器为制冷剂-水换热器，具备制冷剂通道和水通道；The evaporator is a refrigerant-water heat exchanger with a refrigerant channel and a water channel;
所述阀前冷却器为制冷剂-制冷剂换热器，具备两条制冷剂通道，分别为高温制冷剂通道与低温制冷剂通道；The pre-valve cooler is a refrigerant-refrigerant heat exchanger with two refrigerant passages, namely a high-temperature refrigerant passage and a low-temperature refrigerant passage;
所述阀前冷却器的高温通道进口通过制冷剂连接管与液管接口连通，高温通道出口通过制冷剂连接管与所述阀前冷却器的低温通道进口连通，所述阀前冷却器的低温通道出口与所述蒸发器的制冷剂通道进口连通，所述蒸发器的制冷剂通道出口与气液分离器进口连通，所述气液分离器用于实现气液分离，所述气液分离器出口通过制冷剂连接管与压缩机吸气口连通，所述阀前冷却器的高温通道出口与所述蒸发器的制冷剂通道进口之间的制冷剂连接管上设置有电子膨胀阀；The high temperature passage inlet of the pre-valve cooler communicates with the liquid pipe interface through the refrigerant connecting pipe, the high temperature passage outlet communicates with the low temperature passage inlet of the pre-valve cooler through the refrigerant connecting pipe, and the low temperature passage of the pre-valve cooler The outlet of the channel communicates with the inlet of the refrigerant channel of the evaporator, and the outlet of the refrigerant channel of the evaporator communicates with the inlet of the gas-liquid separator, the gas-liquid separator is used to realize gas-liquid separation, and the outlet of the gas-liquid separator The refrigerant connecting pipe communicates with the suction port of the compressor, and the refrigerant connecting pipe between the high temperature channel outlet of the pre-valve cooler and the refrigerant channel inlet of the evaporator is provided with an electronic expansion valve;
所述蒸发器的水通道通过水管与水管进口和水管出口连通；The water channel of the evaporator communicates with the water pipe inlet and the water pipe outlet through the water pipe;
所述压缩机排气口通过制冷剂连接管与油分离器入口连通，所述油分离器用于将压缩机排出的高压蒸汽中的润滑油进行分离，所述油分离器的制冷剂出口通过制冷剂连接管与气管接口连通，所述油分离器的油出口又连通至压缩机吸气口。The exhaust port of the compressor communicates with the inlet of the oil separator through the refrigerant connecting pipe, and the oil separator is used to separate the lubricating oil in the high-pressure steam discharged from the compressor, and the refrigerant outlet of the oil separator is passed through the refrigerant The agent connecting pipe is communicated with the gas pipe interface, and the oil outlet of the oil separator is communicated with the suction port of the compressor.
上述第一种超大过冷度的蒸气压缩高温热泵机组，采用常规压缩机，没有中间补气口，并且不需要经济器。当热泵机组选用R245fa等高温制冷剂时，由于制冷剂特性，即使采用单级压缩，压缩机排气温度也不会过高。The above-mentioned first type of vapor compression high-temperature heat pump unit with super-large subcooling degree adopts a conventional compressor, has no intermediate air supply port, and does not need an economizer. When the heat pump unit uses a high-temperature refrigerant such as R245fa, due to the characteristics of the refrigerant, even if single-stage compression is used, the compressor discharge temperature will not be too high.
本发明提供第二种超大过冷度的蒸气压缩高温热泵机组。The invention provides the second type of vapor compression high-temperature heat pump unit with super-large degree of subcooling.
在第一种超大过冷度的蒸气压缩高温热泵机组的基础上，改变阀前冷却器与蒸发器的连接方式。即，在第一种超大过冷度的蒸气压缩高温热泵机组的基础上，所述阀前冷却器的高温通道进口通过制冷剂连接管与液管接口连通，高温通道出口通过制冷剂连接管分别与所述蒸发器的制冷剂通道入口以及所述阀前冷却器的低温通道进口连通，所述阀前冷却器的低温通道出口与所述蒸发器的制冷剂通道出口均通过制冷剂连接管与气液分离器进口连通，所述气液分离器用于实现气液分离，所述气液分离器出口通过制冷剂连接管与压缩机吸气口连通，所述阀前冷却器的高温通道出口与所述蒸发器的制冷剂通道入口之间的制冷剂连接管上设置有电子膨胀阀，所述阀前冷却器的高温通道出口与所述阀前冷却器的低温通道进口之间的制冷剂连接管上设置有电子膨胀阀。On the basis of the first super-large subcooling vapor compression high-temperature heat pump unit, the connection mode between the pre-valve cooler and the evaporator is changed. That is, on the basis of the first type of vapor compression high-temperature heat pump unit with super-large subcooling degree, the inlet of the high-temperature channel of the pre-valve cooler communicates with the interface of the liquid pipe through the refrigerant connecting pipe, and the outlet of the high-temperature channel is respectively connected through the refrigerant connecting pipe. It communicates with the inlet of the refrigerant channel of the evaporator and the inlet of the low-temperature channel of the pre-valve cooler, and the outlet of the low-temperature channel of the pre-valve cooler and the outlet of the refrigerant channel of the evaporator are connected to each other through the refrigerant connecting pipe. The inlet of the gas-liquid separator is connected, and the gas-liquid separator is used to realize gas-liquid separation. The outlet of the gas-liquid separator is connected with the suction port of the compressor through the refrigerant connecting pipe. The outlet of the high-temperature channel of the pre-valve cooler is connected with the The refrigerant connection pipe between the refrigerant passage inlets of the evaporator is provided with an electronic expansion valve, and the refrigerant connection between the high temperature passage outlet of the pre-valve cooler and the low temperature passage inlet of the pre-valve cooler An electronic expansion valve is provided on the pipe.
本发明提供第三种超大过冷度的蒸气压缩高温热泵机组。The invention provides a third type of vapor compression high-temperature heat pump unit with super-large degree of subcooling.
在第一种超大过冷度的蒸气压缩高温热泵机组的基础上，将压缩机改为喷气增焓压缩机，同时增加经济器。On the basis of the first type of vapor compression high-temperature heat pump unit with super-large subcooling degree, the compressor is changed to a gas-injection enthalpy-increasing compressor, and an economizer is added at the same time.
即，在第一种超大过冷度的蒸气压缩高温热泵机组的基础上，所述压缩机为喷气增焓压缩机，包括吸气口、补气口与排气口，That is, on the basis of the first type of vapor compression high-temperature heat pump unit with super-large subcooling degree, the compressor is an air-injection enthalpy-increasing compressor, including a suction port, an air supply port and an exhaust port,
所述超大过冷度的蒸气压缩高温热泵机组还包括经济器，The vapor compression high-temperature heat pump unit with super-large subcooling degree also includes an economizer,
所述经济器为制冷剂-制冷剂换热器，具备两条制冷剂通道，分别为高温制冷剂通道与低温制冷剂通道；The economizer is a refrigerant-refrigerant heat exchanger with two refrigerant passages, namely a high-temperature refrigerant passage and a low-temperature refrigerant passage;
所述经济器的高温制冷剂通道进口通过制冷剂连接管与液管接口连通，所述经济器的高温制冷剂通道出口通过制冷剂连接管与所述阀前冷却器的高温通道进口连通，所述经济器的低温制冷剂通道进口与所述阀前冷却器的高温通道出口之间设置有电子膨胀阀，The high-temperature refrigerant channel inlet of the economizer communicates with the liquid pipe interface through the refrigerant connecting pipe, and the high-temperature refrigerant channel outlet of the economizer communicates with the high-temperature channel inlet of the pre-valve cooler through the refrigerant connecting pipe. An electronic expansion valve is arranged between the low-temperature refrigerant channel inlet of the economizer and the high-temperature channel outlet of the pre-valve cooler,
所述经济器的低温制冷剂通道进口与所述阀前冷却器的高温通道出口连通，所述经济器的低温制冷剂通道出口与所述压缩机的补气口连通。The low-temperature refrigerant channel inlet of the economizer communicates with the high-temperature channel outlet of the pre-valve cooler, and the low-temperature refrigerant channel outlet of the economizer communicates with the air supply port of the compressor.
本发明提供第四种超大过冷度的蒸气压缩高温热泵机组。The present invention provides a fourth vapor compression high-temperature heat pump unit with super-large degree of subcooling.
在第三种超大过冷度的蒸气压缩高温热泵机组的基础上，改变阀前冷却器与蒸发器的连接方式。即，在第三种超大过冷度的蒸气压缩高温热泵机组的基础上，所述阀前冷却器的高温通道进口通过制冷剂连接管与液管接口连通，高温通道出口通过制冷剂连接管分别与所述蒸发器的制冷剂通道入口以及所述阀前冷却器的低温通道进口连通，所述阀前冷却器的低温通道出口与所述蒸发器的制冷剂通道出口均通过制冷剂连接管与气液分离器进口连通，所述气液分离器用于实现气液分离，所述气液分离器出口通过制冷剂连接管与压缩机吸气口连通，所述阀前冷却器的高温通道出口与所述蒸发器的制冷剂通道入口之间的制冷剂连接管上设置有电子膨胀阀，所述阀前冷却器的高温通道出口与所述阀前冷却器的低温通道进口之间的制冷剂连接管上设置有电子膨胀阀。On the basis of the third type of super-large subcooling vapor compression high-temperature heat pump unit, the connection mode between the pre-valve cooler and the evaporator is changed. That is, on the basis of the third type of super-large subcooling vapor compression high-temperature heat pump unit, the inlet of the high-temperature channel of the pre-valve cooler communicates with the interface of the liquid pipe through the refrigerant connecting pipe, and the outlet of the high-temperature channel is respectively connected through the refrigerant connecting pipe. It communicates with the inlet of the refrigerant channel of the evaporator and the inlet of the low-temperature channel of the pre-valve cooler, and the outlet of the low-temperature channel of the pre-valve cooler and the outlet of the refrigerant channel of the evaporator are connected to each other through the refrigerant connecting pipe. The inlet of the gas-liquid separator is connected, and the gas-liquid separator is used to realize gas-liquid separation. The outlet of the gas-liquid separator is connected with the suction port of the compressor through the refrigerant connecting pipe. The outlet of the high-temperature channel of the pre-valve cooler is connected with the The refrigerant connection pipe between the refrigerant passage inlets of the evaporator is provided with an electronic expansion valve, and the refrigerant connection between the high temperature passage outlet of the pre-valve cooler and the low temperature passage inlet of the pre-valve cooler An electronic expansion valve is provided on the pipe.
本发明提供第五种超大过冷度的蒸气压缩高温热泵机组。The present invention provides a fifth type of vapor compression high-temperature heat pump unit with super-large degree of subcooling.
在第三种或第四种超大过冷度的蒸气压缩高温热泵机组的基础上，增加吸气回热器。即，在第三种或第四种超大过冷度的蒸气压缩高温热泵机组的基础上，所述超大过冷度的蒸气压缩高温热泵机组还包括吸气回热器，On the basis of the third or fourth type of ultra-large subcooling vapor compression high-temperature heat pump unit, a suction regenerator is added. That is, on the basis of the third or fourth super-large degree of subcooling vapor compression high-temperature heat pump unit, the super-large degree of subcooling vapor compression high-temperature heat pump unit further includes a suction regenerator,
所述吸气回热器为制冷剂-制冷剂换热器，具备两条制冷剂通道，分别为高温制冷剂通道与低温制冷剂通道，The suction regenerator is a refrigerant-refrigerant heat exchanger, which has two refrigerant passages, namely a high-temperature refrigerant passage and a low-temperature refrigerant passage,
所述吸气回热器的高温制冷剂通道进口通过制冷剂连接管与液管接口连通，所述吸气回热器的高温制冷剂通道出口通过制冷剂连接管与所述经济器的高温制冷剂通道进口连通，The inlet of the high-temperature refrigerant passage of the suction regenerator communicates with the liquid pipe interface through the refrigerant connecting pipe, and the outlet of the high-temperature refrigerant passage of the suction regenerator communicates with the high-temperature refrigeration unit of the economizer through the refrigerant connecting pipe. The inlet of the agent channel is connected,
所述吸气回热器的低温制冷剂通道进口通过制冷剂连接管与所述气液分离器出口连通，所述吸气回热器的低温制冷剂通道出口通过制冷剂连接管与与压缩机吸气口连通。The inlet of the low-temperature refrigerant passage of the suction regenerator communicates with the outlet of the gas-liquid separator through a refrigerant connecting pipe, and the outlet of the low-temperature refrigerant passage of the suction regenerator communicates with the compressor through a refrigerant connecting pipe. The suction port is connected.
上面每一种超大过冷度的蒸气压缩高温热泵机组，优选地，所述油分离器的油出口通过回油管与油过滤器连通，所述油过滤器出口通过回油管和制冷剂连接管与压缩机吸气口连通。For each of the above vapor compression high-temperature heat pump units with a super-large degree of subcooling, preferably, the oil outlet of the oil separator communicates with the oil filter through the oil return pipe, and the oil filter outlet communicates with the oil filter through the oil return pipe and the refrigerant connecting pipe. The compressor suction port is connected.
上面每一种超大过冷度的蒸气压缩高温热泵机组，优选地，所述电子膨胀阀用于通过控制出口过热度调节制冷剂流量。For each of the above vapor compression high-temperature heat pump units with a super-large degree of subcooling, preferably, the electronic expansion valve is used to adjust the refrigerant flow rate by controlling the degree of superheat at the outlet.
上面每一种超大过冷度的蒸气压缩高温热泵机组，优选地，蒸发器不限制于从水源取热，也可以从空气源等进行取热，蒸发器可以为相应的制冷剂-空气换热器，具备制冷剂通道和空气通道，此时，所述蒸发器的空气通道通过气管与气管进口和气管出口连通。For each of the above super-large subcooling vapor compression high-temperature heat pump units, preferably, the evaporator is not limited to taking heat from a water source, but can also take heat from an air source, etc., and the evaporator can exchange heat for the corresponding refrigerant-air The evaporator has a refrigerant passage and an air passage, and at this time, the air passage of the evaporator communicates with the air pipe inlet and the air pipe outlet through the air pipe.
下面以第四种超大过冷度的蒸气压缩高温热泵机组的结构进行详细描述。The structure of the fourth type of vapor compression high-temperature heat pump unit with super-large degree of subcooling will be described in detail below.
一种超大过冷度的蒸气压缩高温热泵机组，主要结构包括喷气增焓压缩机，蒸发器，冷凝器，经济器，阀前冷却器，气液分离器，油分离器，油过滤器，电子膨胀阀，气管接口，液管接口，水管进口，水管出口，加热空气进口，加热空气出口，制冷剂连接管，回油管，水管和风管等。A vapor compression high-temperature heat pump unit with a super-large subcooling degree. Expansion valve, gas pipe connection, liquid pipe connection, water pipe inlet, water pipe outlet, heating air inlet, heating air outlet, refrigerant connection pipe, oil return pipe, water pipe and air pipe, etc.
喷气增焓压缩机相比普通压缩机，除了具有吸气口和排气口外，还增加了补气口。其中，吸气口通过制冷剂连接管与气液分离器连通，补气口通过制冷剂连接管与经济器连通，排气口通过制冷剂连接管与油分离器连通。若采用单级压缩，压比大，排气温度过高，喷气增焓压缩机的使用可以实现两级压缩，从而显著降低排气温度，同时提高热泵机组的制热能力。Compared with ordinary compressors, the air-jet enthalpy-increasing compressor has an additional air supply port in addition to the suction port and the exhaust port. Wherein, the suction port communicates with the gas-liquid separator through the refrigerant connecting pipe, the gas supply port communicates with the economizer through the refrigerant connecting pipe, and the exhaust port communicates with the oil separator through the refrigerant connecting pipe. If single-stage compression is used, the pressure ratio is large and the exhaust temperature is too high. The use of the air injection enthalpy compressor can achieve two-stage compression, thereby significantly reducing the exhaust temperature and improving the heating capacity of the heat pump unit.
蒸发器为制冷剂-水换热器，具备制冷剂通道和水通道，常见类型如壳管式换热器，板式换热器等。其中，蒸发器的制冷剂通道通过制冷剂连接管与电子膨胀阀和气液分离器连通，蒸发器的水通道通过水管与水管进口和水管出口连通。The evaporator is a refrigerant-water heat exchanger, with refrigerant channels and water channels, common types such as shell and tube heat exchangers, plate heat exchangers, etc. Wherein, the refrigerant channel of the evaporator communicates with the electronic expansion valve and the gas-liquid separator through the refrigerant connecting pipe, and the water channel of the evaporator communicates with the water pipe inlet and the water pipe outlet through the water pipe.
冷凝器包括高温冷凝器和低温冷凝器，均为制冷剂-空气换热器，具备制冷剂通道和空气通道，常见类型如翅片管换热器，微通道换热器等。其中，高温冷凝器和低温冷凝器的制冷剂通道通过制冷剂连接管依次连通，并与气管接口和液管接口连通，高温冷凝器和低温冷凝器的空气通道通过风管依次连通，并与加热空气进口和加热空气出口连通。采用两片冷凝器串联可以增大换热面积，增加冷凝器出口过冷度，降低阀前温度，提高热泵机组制热能力。Condensers include high-temperature condensers and low-temperature condensers, both of which are refrigerant-air heat exchangers with refrigerant channels and air channels, common types such as finned tube heat exchangers, micro-channel heat exchangers, etc. Among them, the refrigerant passages of the high-temperature condenser and the low-temperature condenser are connected in turn through the refrigerant connecting pipe, and are connected with the gas pipe interface and the liquid pipe interface, and the air passages of the high-temperature condenser and the low-temperature condenser are connected in turn through the air pipe, and are connected with the heating pipe. The air inlet communicates with the heated air outlet. The use of two condensers in series can increase the heat exchange area, increase the supercooling degree of the condenser outlet, reduce the temperature before the valve, and improve the heating capacity of the heat pump unit.
经济器为制冷剂-制冷剂换热器，具备两条制冷剂通道，常见类型如板式换热器等。其中，经济器的高温通道进口通过制冷剂连接管与液管接口连通，高温通道出口通过制冷剂连接管与阀前冷却器连通；经济器的低温通道进口通过制冷剂连接管与电子膨胀阀连通，低温通道出口通过制冷剂连接管与压缩机补气口连通。经济器一方面可以实现压缩机补气口的补气，同时可以进一步增大过冷度，降低阀前温度。The economizer is a refrigerant-refrigerant heat exchanger with two refrigerant channels, common types such as plate heat exchangers, etc. Among them, the high-temperature channel inlet of the economizer is connected with the liquid pipe interface through the refrigerant connecting pipe, and the high-temperature channel outlet is connected with the pre-valve cooler through the refrigerant connecting pipe; the low-temperature channel inlet of the economizer is connected with the electronic expansion valve through the refrigerant connecting pipe , the outlet of the low-temperature passage communicates with the air supply port of the compressor through the refrigerant connecting pipe. On the one hand, the economizer can realize the air supply at the air supply port of the compressor, and at the same time, it can further increase the degree of subcooling and reduce the temperature before the valve.
阀前冷却器为制冷剂-制冷剂换热器，具备两条制冷剂通道，常见类型如板式换热器等。其中，阀前冷却器的高温通道进口通过制冷剂连接管与经济器连通，高温通道出口通过制冷剂连接管与电子膨胀阀连通；阀前冷却器的低温通道进口通过制冷剂连接管与电子膨胀阀连通，低温通道出口通过制冷剂连接管与气液分离器连通。阀前冷却器可以进一步增大过冷度，使阀前温度降低到60℃以下，同时，阀前冷却器低温制冷剂通道与蒸发器的制冷剂通道为并联关系，可以减少部分经过蒸发器的制冷剂流量，更容易实现蒸发器制冷剂的分液。The pre-valve cooler is a refrigerant-refrigerant heat exchanger with two refrigerant channels, common types such as plate heat exchangers, etc. Among them, the inlet of the high-temperature channel of the pre-valve cooler is connected with the economizer through the refrigerant connecting pipe, and the outlet of the high-temperature channel is connected with the electronic expansion valve through the refrigerant connecting pipe; the inlet of the low-temperature channel of the pre-valve cooler is connected with the electronic expansion valve through the refrigerant connecting pipe. The valve is connected, and the outlet of the low-temperature channel is connected with the gas-liquid separator through the refrigerant connecting pipe. The pre-valve cooler can further increase the subcooling degree, reducing the pre-valve temperature to below 60°C. At the same time, the low-temperature refrigerant channel of the pre-valve cooler and the refrigerant channel of the evaporator are in parallel relationship, which can reduce the part of the refrigerant passing through the evaporator. Refrigerant flow, easier to achieve liquid separation of evaporator refrigerant.
气液分离器，功能在于实现气液分离，防止压缩机吸气带液，避免对压缩机动力部件造成损坏，起到保护压缩机的作用。其中，气液分离器的进口通过制冷剂连接管与阀前冷却器和蒸发器连通，出口通过制冷剂连接管与压缩机吸气口连通。The function of the gas-liquid separator is to realize gas-liquid separation, prevent the compressor from sucking liquid, avoid damage to the power components of the compressor, and protect the compressor. Wherein, the inlet of the gas-liquid separator communicates with the pre-valve cooler and the evaporator through the refrigerant connecting pipe, and the outlet communicates with the suction port of the compressor through the refrigerant connecting pipe.
油分离器，功能在于将压缩机排出的高压蒸汽中的润滑油进行分离，以保证机组安全高效地运行。其中，油分离器的进口通过制冷剂连接管与压缩机排气口连通，制冷剂出口通过制冷剂连接管与气管接口连通，油出口通过回油管与油过滤器连通。油过滤器出口通过回油管与压缩机吸气口连通。The function of the oil separator is to separate the lubricating oil in the high-pressure steam discharged from the compressor to ensure the safe and efficient operation of the unit. Wherein, the inlet of the oil separator communicates with the exhaust port of the compressor through the refrigerant connecting pipe, the refrigerant outlet communicates with the gas pipe interface through the refrigerant connecting pipe, and the oil outlet communicates with the oil filter through the oil return pipe. The outlet of the oil filter communicates with the suction port of the compressor through the oil return pipe.
经济器前配备有电子膨胀阀，功能在于通过控制出口过热度调节经济器的制冷剂流量；阀前冷却器前的电子膨胀阀，功能在于通过控制出口过热度调节阀前冷却器的制冷剂流量；蒸发器前的电子膨胀阀，功能在于通过控制出口过热度调节蒸发器的制冷剂流量。An electronic expansion valve is equipped before the economizer, whose function is to adjust the refrigerant flow of the economizer by controlling the outlet superheat; the electronic expansion valve before the pre-valve cooler, whose function is to adjust the refrigerant flow of the pre-valve cooler by controlling the outlet superheat ; The function of the electronic expansion valve in front of the evaporator is to adjust the refrigerant flow rate of the evaporator by controlling the outlet superheat.
本发明的特征和有益效果在于：Features and beneficial effects of the present invention are:
1.采用喷气增焓压缩机，可以显著降低排气温度，同时提高热泵机组的制热能力，同时降低节流前阀前温度；1. The air-injection enthalpy-increasing compressor can significantly reduce the exhaust temperature, improve the heating capacity of the heat pump unit, and reduce the pre-valve temperature before throttling;
2.采用两片冷凝器串联，增大换热面积，一方面可以降低冷凝温度，提升机组效率，另一方面可以增大冷凝器出口过冷度；2. Two condensers are used in series to increase the heat exchange area. On the one hand, it can reduce the condensation temperature and improve the efficiency of the unit. On the other hand, it can increase the supercooling degree of the condenser outlet;
3.采用阀前冷却器与蒸发器并联，可以进一步增大系统过冷度。3. The pre-valve cooler is connected in parallel with the evaporator, which can further increase the subcooling degree of the system.
本发明的有益效果在于：The beneficial effects of the present invention are:
1.系统产生超大过冷度，可以显著降低阀前温度，从而保证膨胀阀在安全范围内运行；1. The system produces super-large subcooling, which can significantly reduce the temperature before the valve, so as to ensure that the expansion valve operates within a safe range;
2.超大过冷度可以减小制冷剂进入蒸发器的干度，从而有利于分液，加强蒸发器的换热效果；2. The ultra-large supercooling degree can reduce the dryness of the refrigerant entering the evaporator, which is beneficial to liquid separation and enhances the heat exchange effect of the evaporator;
3.超大过冷度使单位质量流量制冷剂的制冷量增加，因此在相同制冷量条件下大过冷度系统经过蒸发器的制冷剂流量减少，有利于降低制冷剂压降。3. The ultra-large subcooling degree increases the cooling capacity of the refrigerant per unit mass flow rate. Therefore, under the same cooling capacity, the refrigerant flow rate of the system with a large subcooling degree passing through the evaporator is reduced, which is beneficial to reduce the pressure drop of the refrigerant.
附图说明Description of drawings
图1为实施例1的结构和流程示意图：Fig. 1 is the structure and flow diagram of embodiment 1:
图中1为喷气增焓压缩机(1a为吸气口，1b为补气口，1c为排气口)，2为蒸发器，3a为高温冷凝器，3b为低温冷凝器，4为经济器，5为阀前冷却器，6为气液分离器，7为油分离器，8为油过滤器，9a，9b，9c均为电子膨胀阀，10为气管接口，11为液管接口，12为水管进口，13为水管出口，14为加热空气进口，15为加热空气出口，16、17、18、19、20、21、22、23、24、25、26、27、28、29、30、31、32、33、34、35、36为制冷剂连接管，37、38为回油管，39、40为水管，41、42、43为风管。In the figure, 1 is the air injection enthalpy increasing compressor (1a is the suction port, 1b is the air supply port, 1c is the exhaust port), 2 is the evaporator, 3a is the high temperature condenser, 3b is the low temperature condenser, 4 is the economizer, 5 is the pre-valve cooler, 6 is the gas-liquid separator, 7 is the oil separator, 8 is the oil filter, 9a, 9b, 9c are electronic expansion valves, 10 is the gas pipe connection, 11 is the liquid pipe connection, 12 is the Water pipe inlet, 13 is water pipe outlet, 14 is heating air inlet, 15 is heating air outlet, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,32,33,34,35,36 are refrigerant connection pipes, 37,38 are oil return pipes, 39,40 are water pipes, and 41,42,43 are air pipes.
图2为实施例2的结构和流程示意图：Fig. 2 is the structure and flow diagram of embodiment 2:
图中1为喷气增焓压缩机(1a为吸气口，1b为补气口，1c为排气口)，2为蒸发器，3a为高温冷凝器，3b为低温冷凝器，4为经济器，5为阀前冷却器，6为气液分离器，7为油分离器，8为油过滤器，9a，9b均为电子膨胀阀，10为气管接口，11为液管接口，12为水管进口，13为水管出口，14为加热空气进口，15为加热空气出口，16、17、18、19、20、21、22、23、24、25、26、27、28、29、30、35、36为制冷剂连接管，37、38为回油管，39、40为水管，41、42、43为风管。In the figure, 1 is the air injection enthalpy increasing compressor (1a is the suction port, 1b is the air supply port, 1c is the exhaust port), 2 is the evaporator, 3a is the high temperature condenser, 3b is the low temperature condenser, 4 is the economizer, 5 is the pre-valve cooler, 6 is the gas-liquid separator, 7 is the oil separator, 8 is the oil filter, 9a, 9b are electronic expansion valves, 10 is the gas pipe connection, 11 is the liquid pipe connection, 12 is the water pipe inlet , 13 is the water pipe outlet, 14 is the heating air inlet, 15 is the heating air outlet, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 35, 36 is a refrigerant connecting pipe, 37,38 are oil return pipes, 39,40 are water pipes, and 41,42,43 are air pipes.
图3为实施例3的结构和流程示意图：Fig. 3 is the structure and flow diagram of embodiment 3:
图中1为喷气增焓压缩机(1a为吸气口，1b为补气口，1c为排气口)，2为蒸发器，3a为高温冷凝器，3b为低温冷凝器，4为经济器，5为阀前冷却器，6为气液分离器，7为油分离器，8为油过滤器，9a，9b，9c均为电子膨胀阀，10为气管接口，11为液管接口，12为水管进口，13为水管出口，14为加热空气进口，15为加热空气出口，16、17、18、19、20、21、22、23、24、25、26、27、28、29、30、31、32、33、34、35、36、45、46为制冷剂连接管，37、38为回油管，39、40为水管，41、42、43为风管，44为吸气回热器。In the figure, 1 is the air injection enthalpy increasing compressor (1a is the suction port, 1b is the air supply port, 1c is the exhaust port), 2 is the evaporator, 3a is the high temperature condenser, 3b is the low temperature condenser, 4 is the economizer, 5 is the pre-valve cooler, 6 is the gas-liquid separator, 7 is the oil separator, 8 is the oil filter, 9a, 9b, 9c are electronic expansion valves, 10 is the gas pipe connection, 11 is the liquid pipe connection, 12 is the Water pipe inlet, 13 is water pipe outlet, 14 is heating air inlet, 15 is heating air outlet, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 45, 46 are refrigerant connecting pipes, 37, 38 are oil return pipes, 39, 40 are water pipes, 41, 42, 43 are air pipes, and 44 is a suction regenerator .
图4为实施例4的结构和流程示意图：Fig. 4 is the structure and flow diagram of embodiment 4:
图中1为常规压缩机(1a为吸气口，1c为排气口)，2为蒸发器，3a为高温冷凝器，3b为低温冷凝器，5为阀前冷却器，6为气液分离器，7为油分离器，8为油过滤器，9b，9c均为电子膨胀阀，10为气管接口，11为液管接口，12为水管进口，13为水管出口，14为加热空气进口，15为加热空气出口，16、17、18、19、20、21、22、23、24、25、26、27、28、29、35、36为制冷剂连接管，37、38为回油管，39、40为水管，41、42、43为风管。In the figure, 1 is a conventional compressor (1a is the suction port, 1c is the exhaust port), 2 is the evaporator, 3a is the high-temperature condenser, 3b is the low-temperature condenser, 5 is the pre-valve cooler, and 6 is the gas-liquid separation 7 is an oil separator, 8 is an oil filter, 9b, 9c are electronic expansion valves, 10 is an air pipe connection, 11 is a liquid pipe connection, 12 is a water pipe inlet, 13 is a water pipe outlet, 14 is a heating air inlet, 15 is the heating air outlet, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 35, 36 are refrigerant connecting pipes, 37, 38 are oil return pipes, 39,40 are water pipes, and 41,42,43 are air pipes.
具体实施方式Detailed ways
下面结合附图和具体实施例对本发明进行详细说明。The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
实施例1Example 1
一种超大过冷度的蒸气压缩高温热泵机组，结构和流程如图1所示，主要结构包括喷气增焓压缩机1，1a为吸气口，1b为补气口，1c为排气口，蒸发器2，高温冷凝器3a，低温冷凝器3b，经济器4，阀前冷却器5，气液分离器6，油分离器7，油过滤器8，电子膨胀阀9a，电子膨胀阀9b，电子膨胀阀9c，气管接口10，液管接口11，水管进口12，水管出口13，加热空气进口14，加热空气出口15，制冷剂连接管16、17、18、19、20、21、22、23、24、25、26、27、28、29、30、31、32、33、34、35、36，回油管37、38，水管39、40，风管41、42、43。A vapor compression high-temperature heat pump unit with a super-large subcooling degree. The structure and process are shown in Figure 1. The main structure includes an air injection enthalpy increasing compressor 1, 1a is the suction port, 1b is the air supply port, 1c is the exhaust port, and the evaporation 2, high temperature condenser 3a, low temperature condenser 3b, economizer 4, pre-valve cooler 5, gas-liquid separator 6, oil separator 7, oil filter 8, electronic expansion valve 9a, electronic expansion valve 9b, electronic Expansion valve 9c, gas pipe connection 10, liquid pipe connection 11, water pipe inlet 12, water pipe outlet 13, heating air inlet 14, heating air outlet 15, refrigerant connecting pipes 16, 17, 18, 19, 20, 21, 22, 23 , 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, oil return pipe 37, 38, water pipe 39, 40, air pipe 41, 42, 43.
喷气增焓压缩机1相比普通压缩机，除了具有吸气口1a和排气口1c，还增加了补气口1b。其中，吸气口1a通过制冷剂连接管35、36与气液分离器6连通，补气口1b通过制冷剂连接管26与经济器4连通，排气口1c通过制冷剂连接管16与油分离器7连通。若采用单级压缩，压比大，排气温度过高，喷气增焓压缩机1的使用可以实现两级压缩，从而显著降低排气温度，同时提高热泵机组的制热能力。Compared with ordinary compressors, the air injection enthalpy increasing compressor 1 has an air intake port 1a and an exhaust port 1c, and also has an air supplement port 1b. Among them, the suction port 1a communicates with the gas-liquid separator 6 through the refrigerant connecting pipes 35 and 36, the air supply port 1b communicates with the economizer 4 through the refrigerant connecting pipe 26, and the exhaust port 1c is separated from the oil through the refrigerant connecting pipe 16. Device 7 is connected. If single-stage compression is used, the pressure ratio is large and the exhaust temperature is too high, the use of the air injection enthalpy increasing compressor 1 can realize two-stage compression, thereby significantly reducing the exhaust temperature and improving the heating capacity of the heat pump unit.
蒸发器2为制冷剂-水换热器，具备制冷剂通道和水通道，常见类型如壳管式换热器，板式换热器等。其中，蒸发器2的制冷剂通道通过制冷剂连接管32、33、34与电子膨胀阀9c和气液分离器6连通，蒸发器2的水通道通过水管39、40与水管进口12和水管出口13连通。The evaporator 2 is a refrigerant-water heat exchanger, having refrigerant channels and water channels, common types such as shell-and-tube heat exchangers, plate heat exchangers, and the like. Wherein, the refrigerant channel of the evaporator 2 communicates with the electronic expansion valve 9c and the gas-liquid separator 6 through the refrigerant connecting pipes 32, 33, 34, and the water channel of the evaporator 2 communicates with the water pipe inlet 12 and the water pipe outlet 13 through the water pipes 39, 40 connected.
高温冷凝器3a和低温冷凝器3b均为制冷剂-空气换热器，具备制冷剂通道和空气通道，常见类型如翅片管换热器，微通道换热器等。其中，高温冷凝器3a和低温冷凝器3b的制冷剂通道通过制冷剂连接管18、19、20依次连通，并与气管接口10和液管接口11连通，高温冷凝器3a和低温冷凝器3b的空气通道通过风管41、42、43依次连通，并与加热空气进口14和加热空气出口15连通。采用两片冷凝器串联可以增大换热面积，增加冷凝器出口过冷度，从而提高热泵机组制热能力。Both the high-temperature condenser 3a and the low-temperature condenser 3b are refrigerant-air heat exchangers with refrigerant channels and air channels, common types such as finned tube heat exchangers, micro-channel heat exchangers, etc. Wherein, the refrigerant channels of the high-temperature condenser 3a and the low-temperature condenser 3b are communicated in sequence through refrigerant connecting pipes 18, 19, 20, and are communicated with the gas pipe interface 10 and the liquid pipe interface 11, and the high-temperature condenser 3a and the low-temperature condenser 3b The air channels communicate in sequence through the air pipes 41 , 42 , 43 and communicate with the heated air inlet 14 and the heated air outlet 15 . The use of two condensers in series can increase the heat exchange area and increase the subcooling degree of the condenser outlet, thereby improving the heating capacity of the heat pump unit.
经济器4为制冷剂-制冷剂换热器，具备两条制冷剂通道，分别为高温制冷剂通道与低温制冷剂通道，常见类型如板式换热器等。其中，经济器4的高温制冷剂通道进口通过制冷剂连接管21与液管接口11连通，高温制冷剂通道出口通过制冷剂连接管22与阀前冷却器5连通；经济器4的低温制冷剂通道进口通过制冷剂连接管25与电子膨胀阀9a连通，低温制冷剂通道出口通过制冷剂连接管26与压缩机补气口1b连通。经济器4一方面可以实现压缩机补气口的补气，同时可以进一步增大过冷度，降低阀前温度。The economizer 4 is a refrigerant-refrigerant heat exchanger with two refrigerant passages, namely a high-temperature refrigerant passage and a low-temperature refrigerant passage, common types such as plate heat exchangers. Wherein, the high-temperature refrigerant channel inlet of the economizer 4 communicates with the liquid pipe interface 11 through the refrigerant connecting pipe 21, and the high-temperature refrigerant channel outlet communicates with the pre-valve cooler 5 through the refrigerant connecting pipe 22; the low-temperature refrigerant of the economizer 4 The inlet of the channel communicates with the electronic expansion valve 9 a through the refrigerant connecting pipe 25 , and the outlet of the low-temperature refrigerant passage communicates with the air supply port 1 b of the compressor through the refrigerant connecting pipe 26 . On the one hand, the economizer 4 can realize the air supply at the air supply port of the compressor, and at the same time can further increase the degree of subcooling and reduce the temperature before the valve.
阀前冷却器5为制冷剂-制冷剂换热器，具备两条制冷剂通道，分别为高温制冷剂通道与低温制冷剂通道，常见类型如板式换热器等。其中，阀前冷却器5的高温制冷剂通道进口通过制冷剂连接管22与经济器4连通，高温制冷剂通道出口通过制冷剂连接管23、24与电子膨胀阀9a连通；阀前冷却器5的低温制冷剂通道进口通过制冷剂连接管29与电子膨胀阀9b连通，低温制冷剂通道出口通过制冷剂连接管30、34与气液分离器6连通。阀前冷却器5可以进一步增大过冷度，使阀前温度降低到60℃以下，同时，阀前冷却器5的低温制冷剂通道与蒸发器2的制冷剂通道为并联关系，可以减少部分经过蒸发器2的制冷剂流量，更容易实现蒸发器制冷剂的分液。The pre-valve cooler 5 is a refrigerant-refrigerant heat exchanger with two refrigerant passages, namely a high-temperature refrigerant passage and a low-temperature refrigerant passage, common types such as plate heat exchangers. Wherein, the high-temperature refrigerant channel inlet of the pre-valve cooler 5 communicates with the economizer 4 through the refrigerant connecting pipe 22, and the high-temperature refrigerant channel outlet communicates with the electronic expansion valve 9a through the refrigerant connecting pipes 23, 24; the pre-valve cooler 5 The inlet of the low-temperature refrigerant channel is communicated with the electronic expansion valve 9 b through the refrigerant connecting pipe 29 , and the outlet of the low-temperature refrigerant channel is communicated with the gas-liquid separator 6 through the refrigerant connecting pipes 30 and 34 . The pre-valve cooler 5 can further increase the degree of subcooling, reducing the pre-valve temperature to below 60°C. At the same time, the low-temperature refrigerant channel of the pre-valve cooler 5 is connected in parallel with the refrigerant channel of the evaporator 2, which can reduce part The refrigerant flow rate passing through the evaporator 2 makes it easier to realize the liquid separation of the refrigerant in the evaporator.
气液分离器6，功能在于实现气液分离，防止压缩机1吸气带液，避免对压缩机动力部件造成损坏，起到保护压缩机1的作用。其中，气液分离器6的进口通过制冷剂连接管30、33、34与回热器5和蒸发器2连通，出口通过制冷剂连接管35、36与压缩机吸气口1a连通。The function of the gas-liquid separator 6 is to realize gas-liquid separation, prevent the compressor 1 from sucking liquid, avoid damage to the power components of the compressor, and protect the compressor 1 . Wherein, the inlet of the gas-liquid separator 6 communicates with the regenerator 5 and the evaporator 2 through refrigerant connecting pipes 30 , 33 , 34 , and the outlet communicates with the compressor suction port 1 a through refrigerant connecting pipes 35 , 36 .
油分离器7，功能在于将压缩机1排出的高压蒸汽中的润滑油进行分离，以保证机组安全高效地运行。其中，油分离器7的进口通过制冷剂连接管16与压缩机排气口1c连通，油分离器7的制冷剂出口通过制冷剂连接管17与气管接口10连通，油分离器7的油出口通过回油管37与油过滤器8连通。油过滤器8出口通过回油管38和制冷剂连接管36与压缩机吸气口1a连通。The function of the oil separator 7 is to separate the lubricating oil in the high-pressure steam discharged from the compressor 1, so as to ensure the safe and efficient operation of the unit. Wherein, the inlet of the oil separator 7 communicates with the compressor exhaust port 1c through the refrigerant connecting pipe 16, the refrigerant outlet of the oil separator 7 communicates with the gas pipe interface 10 through the refrigerant connecting pipe 17, and the oil outlet of the oil separator 7 It communicates with the oil filter 8 through the oil return pipe 37 . The outlet of the oil filter 8 communicates with the compressor suction port 1 a through the oil return pipe 38 and the refrigerant connection pipe 36 .
电子膨胀阀9a，功能在于通过控制出口过热度调节经济器4的制冷剂流量；电子膨胀阀9b，功能在于通过控制出口过热度调节阀前冷却器5的制冷剂流量；电子膨胀阀9c，功能在于通过控制出口过热度调节蒸发器2的制冷剂流量。The function of the electronic expansion valve 9a is to adjust the refrigerant flow of the economizer 4 by controlling the outlet superheat; the function of the electronic expansion valve 9b is to adjust the refrigerant flow of the pre-cooler 5 by controlling the outlet superheat; It is to adjust the refrigerant flow rate of the evaporator 2 by controlling the degree of superheat at the outlet.
高温热泵机组的工作原理为，蒸发器2内的制冷剂从水源中吸收热量后，与在阀前冷却器5内气化的低温制冷剂混合，一起进入气液分离器6，经过气液分离后，从吸气口1a进入喷气增焓压缩机1，制冷剂气体被压缩至中间状态时，与补气口1b进入的制冷剂气体混合，第二次被压缩，变成高温高压的制冷剂气体。之后，制冷剂进入油分离器7，其中的润滑油经过油过滤器8，沿回油管回到压缩机吸气口1a；制冷剂经过气管接口10，依次进入高温冷凝器3a和低温冷凝器3b，对空气进行加热。之后，制冷剂经液管接口11进入经济器4，被低温制冷剂通道内的制冷剂冷却后，进入阀前冷却器5。在阀前冷却器5内被进一步冷却后，一部分制冷剂经电子膨胀阀9a进入经济器4，气化为制冷剂气体后进入压缩机补气口1b；另一部分制冷剂分为两路，一路经电子膨胀阀9b进入阀前冷却器5气化为制冷剂气体，另一路经电子膨胀阀9c进入蒸发器2气化为制冷剂气体，两路制冷剂混合，完成整个系统的循环。The working principle of the high-temperature heat pump unit is that the refrigerant in the evaporator 2 absorbs heat from the water source, mixes with the low-temperature refrigerant vaporized in the pre-valve cooler 5, enters the gas-liquid separator 6 together, and undergoes gas-liquid separation. Afterwards, it enters the gas injection enthalpy increasing compressor 1 from the suction port 1a, and when the refrigerant gas is compressed to an intermediate state, it mixes with the refrigerant gas entering the gas supply port 1b, and is compressed for the second time to become a high-temperature and high-pressure refrigerant gas . Afterwards, the refrigerant enters the oil separator 7, the lubricating oil in it passes through the oil filter 8, and returns to the suction port 1a of the compressor along the oil return pipe; the refrigerant passes through the gas pipe interface 10, and enters the high-temperature condenser 3a and the low-temperature condenser 3b in turn , to heat the air. After that, the refrigerant enters the economizer 4 through the liquid pipe interface 11 , and enters the pre-valve cooler 5 after being cooled by the refrigerant in the low-temperature refrigerant channel. After being further cooled in the pre-valve cooler 5, part of the refrigerant enters the economizer 4 through the electronic expansion valve 9a, is vaporized into refrigerant gas, and then enters the gas supply port 1b of the compressor; the other part of the refrigerant is divided into two routes, one through The electronic expansion valve 9b enters the pre-valve cooler 5 to be vaporized into refrigerant gas, and the other path enters the evaporator 2 through the electronic expansion valve 9c to be vaporized into refrigerant gas, and the two refrigerants are mixed to complete the cycle of the entire system.
实施例2Example 2
一种超大过冷度的蒸气压缩高温热泵机组，结构和流程如图2所示，主要结构包括喷气增焓压缩机1，1a为吸气口，1b为补气口，1c为排气口，蒸发器2，高温冷凝器3a，低温冷凝器3b，经济器4，阀前冷却器5，气液分离器6，油分离器7，油过滤器8，电子膨胀阀9a，电子膨胀阀9b，气管接口10，液管接口11，水管进口12，水管出口13，加热空气进口14，加热空气出口15，制冷剂连接管16、17、18、19、20、21、22、23、24、25、26、27、28、29、30、35、36，回油管37、38，水管39、40，风管41、42、43。A vapor compression high-temperature heat pump unit with a super-large subcooling degree. The structure and process are shown in Figure 2. The main structure includes an air injection enthalpy increasing compressor 1, 1a is the suction port, 1b is the air supply port, 1c is the exhaust port, and the evaporation 2, high temperature condenser 3a, low temperature condenser 3b, economizer 4, pre-valve cooler 5, gas-liquid separator 6, oil separator 7, oil filter 8, electronic expansion valve 9a, electronic expansion valve 9b, air pipe Interface 10, liquid pipe interface 11, water pipe inlet 12, water pipe outlet 13, heating air inlet 14, heating air outlet 15, refrigerant connecting pipes 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 35, 36, oil return pipes 37, 38, water pipes 39, 40, air pipes 41, 42, 43.
与实施例1相比，仅蒸发器2和阀前冷却器5的连接方式发生改变，在实施例1中，蒸发器2的制冷剂通道和阀前冷却器5的低温制冷剂通道为并联连接，而在实施例2中，二者为串联连接，其余均未改变。电子膨胀阀9b，阀前冷却器5的低温制冷剂通道，蒸发器2的制冷剂通道通过制冷剂连接管28、29依次顺序连接。与实施例1相比，实施例2的系统结构更加简单，只需要控制电子膨胀阀9b就可以完成压缩机吸气过热度控制，更容易实施。Compared with Embodiment 1, only the connection mode between the evaporator 2 and the pre-valve cooler 5 is changed. In Embodiment 1, the refrigerant passage of the evaporator 2 and the low-temperature refrigerant passage of the pre-valve cooler 5 are connected in parallel , while in Example 2, the two are connected in series, and the rest remain unchanged. The electronic expansion valve 9 b , the low-temperature refrigerant channel of the pre-valve cooler 5 , and the refrigerant channel of the evaporator 2 are sequentially connected through refrigerant connecting pipes 28 and 29 . Compared with embodiment 1, the system structure of embodiment 2 is simpler, only need to control the electronic expansion valve 9b to complete the compressor suction superheat control, which is easier to implement.
实施例3Example 3
一种超大过冷度的蒸气压缩高温热泵机组，结构和流程如图3所示，主要结构包括喷气增焓压缩机1，1a为吸气口，1b为补气口，1c为排气口，蒸发器2，高温冷凝器3a，低温冷凝器3b，经济器4，阀前冷却器5，气液分离器6，油分离器7，油过滤器8，电子膨胀阀9a，电子膨胀阀9b，电子膨胀阀9c，气管接口10，液管接口11，水管进口12，水管出口13，加热空气进口14，加热空气出口15，制冷剂连接管16、17、18、19、20、21、22、23、24、25、26、27、28、29、30、31、32、33、34、35、36、45、46，回油管37、38，水管39、40，风管41、42、43，吸气回热器44。A vapor compression high-temperature heat pump unit with a super-large subcooling degree. The structure and process are shown in Figure 3. The main structure includes an air injection enthalpy increasing compressor 1, 1a is the suction port, 1b is the air supply port, 1c is the exhaust port, and the evaporation 2, high temperature condenser 3a, low temperature condenser 3b, economizer 4, pre-valve cooler 5, gas-liquid separator 6, oil separator 7, oil filter 8, electronic expansion valve 9a, electronic expansion valve 9b, electronic Expansion valve 9c, gas pipe connection 10, liquid pipe connection 11, water pipe inlet 12, water pipe outlet 13, heating air inlet 14, heating air outlet 15, refrigerant connecting pipes 16, 17, 18, 19, 20, 21, 22, 23 , 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 45, 46, oil return pipe 37, 38, water pipe 39, 40, air pipe 41, 42, 43, Suction air regenerator 44.
与实施例1相比，仅在制冷剂回路中增加了吸气回热器44，吸气回热器44为制冷剂-制冷剂换热器，具备两条制冷剂通道，分别为高温制冷剂通道与低温制冷剂通道，常见类型如板式换热器等。其中，吸气回热器44的高温制冷剂通道进口通过制冷剂连接管45与液管接口11连通，高温制冷剂通道出口通过制冷剂连接管21与经济器4连通；吸气回热器44的低温制冷剂通道进口通过制冷剂连接管35与气液分离器6连通，低温制冷剂通道出口通过制冷剂连接管46、36与压缩机吸气口1a连通。吸气回热器44的作用是利用蒸发器出口的制冷剂蒸汽去冷却冷凝器出口的高压液体，同样可以增大系统过冷度，并降低阀前温度，有利于保护电子膨胀阀在安全范围内运行。Compared with Embodiment 1, only the suction air regenerator 44 is added in the refrigerant circuit, and the suction air regenerator 44 is a refrigerant-refrigerant heat exchanger with two refrigerant passages, which are high-temperature refrigerant Channels and low-temperature refrigerant channels, common types such as plate heat exchangers, etc. Wherein, the inlet of the high-temperature refrigerant passage of the suction air regenerator 44 communicates with the liquid pipe interface 11 through the refrigerant connecting pipe 45, and the outlet of the high-temperature refrigerant passage communicates with the economizer 4 through the refrigerant connecting pipe 21; the suction air regenerator 44 The inlet of the low-temperature refrigerant passage is communicated with the gas-liquid separator 6 through the refrigerant connecting pipe 35, and the outlet of the low-temperature refrigerant passage is communicated with the compressor suction port 1a through the refrigerant connecting pipes 46, 36. The function of the suction regenerator 44 is to use the refrigerant vapor at the outlet of the evaporator to cool the high-pressure liquid at the outlet of the condenser, which can also increase the subcooling degree of the system and reduce the temperature before the valve, which is beneficial to protect the electronic expansion valve in a safe range. run within.
实施例4Example 4
一种超大过冷度的蒸气压缩高温热泵机组，结构和流程如图4所示，主要结构包括常规压缩机1，1a为吸气口，1c为排气口，蒸发器2，高温冷凝器3a，低温冷凝器3b，阀前冷却器5，气液分离器6，油分离器7，油过滤器8，电子膨胀阀9b，电子膨胀阀9c，气管接口10，液管接口11，水管进口12，水管出口13，加热空气进口14，加热空气出口15，制冷剂连接管16、17、18、19、20、21、22、23、24、25、26、27、28、29、35、36，回油管37、38，水管39、40，风管41、42、43。A vapor compression high-temperature heat pump unit with a super-large subcooling degree. The structure and process are shown in Figure 4. The main structure includes a conventional compressor 1, 1a is the suction port, 1c is the exhaust port, an evaporator 2, and a high-temperature condenser 3a , low temperature condenser 3b, pre-valve cooler 5, gas-liquid separator 6, oil separator 7, oil filter 8, electronic expansion valve 9b, electronic expansion valve 9c, gas pipe connection 10, liquid pipe connection 11, water pipe inlet 12 , water pipe outlet 13, heating air inlet 14, heating air outlet 15, refrigerant connecting pipe 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 35, 36 , Oil return pipe 37,38, water pipe 39,40, air pipe 41,42,43.
与实施例1相比，喷气增焓压缩机替换为常规压缩机1，没有中间补气口1b，并且不需要经济器4。当热泵机组选用R245fa等高温制冷剂时，由于制冷剂特性，即使采用单级压缩，压缩机排气温度也不会过高，因此，在实际实施过程中，喷气增焓压缩机可以替换为常规压缩机1。其中，吸气口1a通过制冷剂连接管35、36与气液分离器6连通，排气口1c通过制冷剂连接管16与油分离器7连通。Compared with Embodiment 1, the gas injection enthalpy increasing compressor is replaced by a conventional compressor 1 , there is no intermediate air supply port 1b, and an economizer 4 is not required. When the heat pump unit chooses high-temperature refrigerants such as R245fa, due to the characteristics of the refrigerant, even if single-stage compression is used, the discharge temperature of the compressor will not be too high. Therefore, in the actual implementation process, the air injection compressor can be replaced by a conventional compressor 1. Wherein, the suction port 1 a communicates with the gas-liquid separator 6 through the refrigerant connecting pipes 35 and 36 , and the exhaust port 1 c communicates with the oil separator 7 through the refrigerant connecting pipe 16 .
应当说明的是，在上述实施例中，蒸发器不限制于从水源取热，也可以从空气源等进行取热，蒸发器可以为相应的制冷剂-空气换热器，具备制冷剂通道和空气通道，常见类型如翅片管换热器等。It should be noted that, in the above-mentioned embodiments, the evaporator is not limited to taking heat from a water source, but can also take heat from an air source, etc., and the evaporator can be a corresponding refrigerant-air heat exchanger, equipped with refrigerant channels and Air channels, common types such as finned tube heat exchangers, etc.
上述实施例中未完整展示制冷剂循环的所有部件，实施过程中，在制冷剂回路设置储液器、过滤器、干燥器等常见制冷辅件，均不能视为对本发明进行了实质性改进，应属于本发明保护范围。All the components of the refrigerant cycle are not fully shown in the above embodiments. During the implementation process, common refrigeration accessories such as liquid receivers, filters, and dryers are installed in the refrigerant circuit, which cannot be regarded as a substantial improvement on the present invention. Should belong to the protection scope of the present invention.
上述的对实施例的描述是为便于该技术领域的普通技术人员能理解和使用发明。熟悉本领域技术的人员显然可以容易地对这些实施例做出各种修改，并把在此说明的一般原理应用到其他实施例中而不必经过创造性的劳动。因此，本发明不限于上述实施例，本领域技术人员根据本发明的揭示，不脱离本发明范畴所做出的改进和修改都应该在本发明的保护范围之内。The above descriptions of the embodiments are for those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments, and apply the general principles described here to other embodiments without creative efforts. Therefore, the present invention is not limited to the above-mentioned embodiments. Improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should fall within the protection scope of the present invention.
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