WO2020177275A1 - Gas heat pump air-conditioning system having non-stop defrosting - Google Patents

Gas heat pump air-conditioning system having non-stop defrosting Download PDF

Info

Publication number
WO2020177275A1
WO2020177275A1 PCT/CN2019/100244 CN2019100244W WO2020177275A1 WO 2020177275 A1 WO2020177275 A1 WO 2020177275A1 CN 2019100244 W CN2019100244 W CN 2019100244W WO 2020177275 A1 WO2020177275 A1 WO 2020177275A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
unit heat
outdoor unit
gas
cooling water
Prior art date
Application number
PCT/CN2019/100244
Other languages
French (fr)
Chinese (zh)
Inventor
陈昌瑞
杨亚华
杨兵
Original Assignee
南京天加环境科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 南京天加环境科技有限公司 filed Critical 南京天加环境科技有限公司
Publication of WO2020177275A1 publication Critical patent/WO2020177275A1/en

Links

Images

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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B27/00—Machines, plants or systems, using particular sources of energy
    • F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine

Definitions

  • the invention relates to an air-conditioning system, in particular to an air-conditioning system capable of defrosting without stopping the machine, in particular to a gas heat pump air-conditioning system without stopping the machine for defrosting.
  • the surface of the outdoor heat exchanger (evaporator) is often lower than 0°C, so the surface will gradually form frost. As the frost thickens, the unit’s The heating capacity will gradually decrease, and the indoor air outlet temperature will also gradually decrease. At this time, defrosting is required.
  • the traditional defrosting method is to switch the four-way reversing valve to defrost through the reverse cycle. That is, the defrosting operation is equivalent to the cooling operation.
  • the indoor unit performs anti-cold air treatment and stops heating.
  • the machine heat exchanger acts as an evaporator to cool the room, but this method will cause the temperature of the room to drop and affect comfort.
  • the purpose of the present invention is to address the shortcomings of the prior art and provide a gas heat pump air conditioning system with non-stop defrosting, which can not only avoid the effect of defrosting on indoor temperature, but also can use gas as a power source to avoid urban
  • the adverse effects of insufficient power supply ensure the comfort and convenience of users.
  • a defrosting and non-stop gas heat pump air-conditioning system comprising a refrigerant circulation circuit composed of a compressor, an oil separator, a four-way valve, an indoor unit heat exchanger, an outdoor unit heat exchanger and a gas-liquid separator connected in sequence .
  • the compressor is connected to the gas engine through a belt; a cooling water tank is arranged outside the gas engine; the cooling water tank forms a cooling water circulation circuit through a water pump and a radiator;
  • It also includes a sub-evaporator.
  • One refrigerant port of the sub-evaporator is connected to the four-way valve and the gas-liquid separator at the same time, and the other refrigerant port is connected to the second end of the indoor unit heat exchanger and the outdoor unit heat exchanger On the pipeline between the first ends; the two ends of the water path of the auxiliary evaporator are respectively connected with the two ends of the radiator; the first end of the outdoor unit heat exchanger is connected with the outlet of the oil separator.
  • thermostat the inlet A of which is connected to one end of the cooling water tank, the outlet B of which is connected to one end of the radiator, and the outlet C of which is connected to a waterway port of the secondary evaporator.
  • first electronic expansion valve and a second electronic expansion valve
  • first electronic expansion valve is provided between the second end of the indoor unit heat exchanger and the first end of the outdoor unit heat exchanger.
  • second electronic expansion valve is arranged on the pipeline between the secondary evaporator and the second end of the indoor unit heat exchanger.
  • first solenoid valve located between the second end of the indoor unit heat exchanger and the second end of the outdoor unit heat exchanger.
  • the second solenoid valve is provided on the pipeline between the second end of the outdoor unit heat exchanger and the four-way valve; the third solenoid valve is provided on the outdoor unit heat exchanger On the pipeline between the first end and the outlet of the oil separator.
  • radiator and the outdoor unit heat exchanger are arranged side by side and closely close to each other.
  • the invention is reasonable in design, compact in structure, convenient to use, and can use part of the refrigerant to perform defrosting work, avoids the adverse effects on users that must be stopped for defrosting in the past, and improves the comfort of use. At the same time, it can also make full use of the heat generated by the gas engine to exchange heat with the outdoor unit heat exchanger to improve the operating efficiency of the air conditioning system and fully meet the heating needs.
  • Figure 1 is a system diagram of the present invention.
  • 1- compressor 2- oil separator, 3- four-way valve, 4- indoor unit heat exchanger, 5- indoor unit electronic expansion valve, 6-first electronic expansion valve, 7- outdoor unit heat exchanger , 8-gas-liquid separator, 9-gas engine, 10-cooling water tank, 11-radiator, 12-water pump, 13-thermostat, 14-sub evaporator, 15-second electronic expansion valve, 16-first Solenoid valve, 17-third solenoid valve, 18-second solenoid valve, 19-belt.
  • a defrosting non-stop gas heat pump air conditioning system comprising a compressor 1, an oil separator 2, a four-way valve 3, an indoor unit heat exchanger 4, an outdoor unit heat exchanger 7 and a gas-liquid separator 8 connected in sequence
  • the refrigerant circulation circuit constituted is specifically: the exhaust port of the compressor 1 passes through the oil separator 2 and the four-way valve 3 in turn, and is connected to the first end of the indoor unit heat exchanger 4, and then heat exchange from the indoor unit
  • the second end of the heat exchanger 4 is connected to the first end of the outdoor unit heat exchanger 7, and the second end of the outdoor unit heat exchanger 7 is connected to the inlet of the gas-liquid separator 8 through the four-way valve 3,
  • the outlet of the gas-liquid separator 8 is connected to the suction port of the compressor 1 to form a complete refrigerant circulation circuit.
  • the indoor unit heat exchanger 4 may be multiple in parallel, and each indoor unit heat exchanger 4 is provided with an indoor unit electronic expansion valve 5, which is convenient for flexible control.
  • the compressor 1 is belt-driven, and is connected to the gas engine 9 through a belt 19; a cooling water tank 10 is provided outside the gas engine 9 to effectively cool the gas engine 9 in time.
  • the cooling water tank 10 also forms a cooling water circulation circuit through the water pump 12 and the radiator 11, so that the heated cooling water enters the radiator 11 through the water pump 12 for cooling, and then flows back to the cooling water tank 10 for repeated use, which saves energy. Environmental protection.
  • the present invention also includes a secondary evaporator 14.
  • One refrigerant port of the secondary evaporator 14 is simultaneously connected to the four-way valve 3 and the inlet of the gas-liquid separator 8, and the other refrigerant port is connected to the indoor unit heat exchanger 4
  • the two ends of the water path of the auxiliary evaporator 14 are respectively connected to the two ends of the radiator 11, which can make full use of cooling water for heat exchange, Improve usage efficiency.
  • the present invention also includes a thermostat 13 whose inlet A is connected to one end of the cooling water tank 10, its outlet B is connected to one end of the radiator 11, and its outlet C is connected to a water port of the secondary evaporator 14,
  • the flow rate of the outlet B and the outlet C can be automatically adjusted according to the cooling water temperature, that is, when the cooling water temperature is ⁇ 70°C, the opening of the outlet B is the smallest, and the opening of the outlet C is the largest; when the cooling water When the temperature is greater than 70°C, the outlet B gradually opens, and the opening degree of the outlet C gradually decreases; when the cooling water temperature is greater than 85°C, the outlet B opens to the maximum, and the opening degree of the outlet C is the smallest.
  • the thermostat 13 Through the adjustment of the thermostat 13, the cooling water can be used fully and effectively and the normal operation of the system can be ensured.
  • the present invention also includes a first electronic expansion valve 6 and a second electronic expansion valve 15 to control the state of the refrigerant in each pipeline;
  • the first electronic expansion valve 6 is provided at the second end of the indoor unit heat exchanger 4 And the first end of the outdoor unit heat exchanger 7;
  • the second electronic expansion valve 15 is provided in the pipe between the auxiliary evaporator 14 and the second end of the indoor unit heat exchanger 4 On the way.
  • the present invention also includes a first solenoid valve 16, a second solenoid valve 18, and a third solenoid valve 17.
  • the first solenoid valve 16 is arranged at the second end of the indoor unit heat exchanger 4 to exchange heat with the outdoor unit.
  • the second solenoid valve 18 is provided on the pipeline between the second end of the outdoor unit heat exchanger 4 and the four-way valve 3; the third solenoid valve 17 is arranged on the pipeline between the first end of the outdoor unit heat exchanger 7 and the outlet of the oil separator 2.
  • the on-off of each section of pipeline can be conveniently controlled.
  • radiator 11 and the outdoor unit heat exchanger 7 are arranged side by side, and are close to each other, usually 0-5 mm, so that sufficient heat exchange can be performed between the two and the utilization rate of cooling water can be improved.
  • the gas engine can choose 3GPH88.
  • the compressor can be GHP5212MY2.
  • the operation process of the present invention is:
  • the second solenoid valve and the first electronic expansion valve are in an open state, and at the same time, the first solenoid valve, the third solenoid valve, and the second electronic expansion valve are closed status.
  • the refrigerant is compressed by the compressor into a high-temperature and high-pressure gaseous refrigerant, passes through the oil separator and the four-way valve in turn, enters the indoor unit heat exchanger and condenses into a high-temperature and high-pressure liquid refrigerant ,
  • the first electronic expansion valve is throttled into a low-temperature and low-pressure gas-liquid two-phase refrigerant, which is simultaneously combined with the radiator and the radiator in the outdoor unit heat exchanger
  • the air undergoes heat exchange and evaporates into a low-temperature and low-pressure gaseous refrigerant, and then flows into the gas-liquid separator and is separated into gaseous and liquid refrigerants.
  • the gaseous refrigerant returns to
  • the second solenoid valve and the first electronic expansion valve are in a closed state, and at the same time, the first solenoid valve, the third solenoid valve, and the second electronic expansion valve are all in a closed state. Open state.
  • the refrigerant is compressed by the compressor into a high-temperature and high-pressure gaseous refrigerant.
  • a part of the refrigerant enters the indoor unit heat exchanger through the four-way valve and condenses into high-temperature and high-pressure gaseous refrigerant.
  • Liquid refrigerant I another part of the refrigerant enters the outdoor unit heat exchanger after passing through the third solenoid valve, condenses into a high-temperature and high-pressure liquid refrigerant II, and after passing through the first solenoid valve, and the liquid
  • the refrigerant I is mixed, and then throttled by the second electronic expansion valve into a low-temperature and low-pressure gas-liquid two-phase refrigerant, and exchanges heat with the high-temperature cooling water from the cooling water tank in the secondary evaporator to evaporate It becomes a low-temperature and low-pressure gaseous refrigerant, and then flows into the gas-liquid separator to be separated into gaseous and liquid refrigerants. Finally, the gaseous refrigerant returns to the compressor to restart the cycle.
  • the refrigerant can not only enter the indoor mechanism to heat, but also enter the outdoor unit for defrosting, without switching the four-way valve to switch the refrigeration mode for defrosting, avoiding the adverse effects of the previous need to stop defrosting , which greatly improves the user experience, and at the same time, also improves the operating efficiency of the system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

A gas heat pump air-conditioning system that has non-stop defrosting, comprising a refrigerant circulation circuit composed of a compressor (1), an oil separator (2), a four-way valve (3), an indoor unit heat exchanger (4), an outdoor unit heat exchanger (7) and a gas-liquid separator (8) that are sequentially connected. The compressor (1) is connected to a gas engine (9) by means of a belt. A cooling water tank (10) is provided outside of the gas engine (9), and the cooling water tank (10) forms a cooling water circulation circuit by means of a water pump (12) and a heat dissipator (11). The present system further comprises an auxiliary evaporator (14), one refrigerant port of which is simultaneouly connected to the four-way valve (3) and the gas-liquid separator (8), and the other refrigerant port of which is connected onto a pipeline between a second end of the indoor unit heat exchanger (4) and a first end of the outdoor unit heat exchanger (7). Two ends of the water path of the auxiliary evaporator (14) are connected to two ends of the heat dissipator (11) respectively, and the first end of the outdoor unit heat exchanger (7) is connected to an outlet of the oil separator (2).

Description

一种除霜不停机的燃气热泵空调系统A defrosting non-stop gas heat pump air conditioning system 技术领域Technical field
本发明涉及一种空调系统，尤其是一种能够在不停机的前提下进行除霜的空调系统，具体的说是一种除霜不停机的燃气热泵空调系统。The invention relates to an air-conditioning system, in particular to an air-conditioning system capable of defrosting without stopping the machine, in particular to a gas heat pump air-conditioning system without stopping the machine for defrosting.
背景技术Background technique
空调系统在冬季的制热运行时，由于室外环境温度低，室外换热器(蒸发器)表面经常会低于0℃以下，所以表面会逐渐结霜，随着结霜的加厚，机组的制热能力会逐渐降低，室内的出风温度也逐渐降低，此时就需要进行除霜。目前，传统的除霜方法都是采用切换四通换向阀而通过逆循环进行除霜，即，除霜运行相当于制冷运行，此时室内机进行防冷风处理，停止供热，同时，室内机换热器作为蒸发器向室内散冷，但是，这种方法将会导致房间的温度下降，影响舒适性。During the heating operation of the air-conditioning system in winter, due to the low outdoor ambient temperature, the surface of the outdoor heat exchanger (evaporator) is often lower than 0℃, so the surface will gradually form frost. As the frost thickens, the unit’s The heating capacity will gradually decrease, and the indoor air outlet temperature will also gradually decrease. At this time, defrosting is required. At present, the traditional defrosting method is to switch the four-way reversing valve to defrost through the reverse cycle. That is, the defrosting operation is equivalent to the cooling operation. At this time, the indoor unit performs anti-cold air treatment and stops heating. The machine heat exchanger acts as an evaporator to cool the room, but this method will cause the temperature of the room to drop and affect comfort.
发明内容Summary of the invention
本发明的目的是针对现有技术的不足，提供一种除霜不停机的燃气热泵空调系统，不仅可以避免除霜时对室内温度的影响，而且，还可利用燃气作为动力来源，避免了城市电力供应不足而带来的不利影响，确保用户使用的舒适和便捷。The purpose of the present invention is to address the shortcomings of the prior art and provide a gas heat pump air conditioning system with non-stop defrosting, which can not only avoid the effect of defrosting on indoor temperature, but also can use gas as a power source to avoid urban The adverse effects of insufficient power supply ensure the comfort and convenience of users.
本发明的技术方案是：The technical scheme of the present invention is:
一种除霜不停机的燃气热泵空调系统，包括由压缩机、油分离器、四通阀、室内机换热器、室外机换热器和气液分离器依序连接而构成的制冷剂循环回路。A defrosting and non-stop gas heat pump air-conditioning system, comprising a refrigerant circulation circuit composed of a compressor, an oil separator, a four-way valve, an indoor unit heat exchanger, an outdoor unit heat exchanger and a gas-liquid separator connected in sequence .
所述压缩机通过皮带与燃气发动机相连；该燃气发动机的外部设有冷却水箱；该冷却水箱通过水泵与散热器构成冷却水循环回路；The compressor is connected to the gas engine through a belt; a cooling water tank is arranged outside the gas engine; the cooling water tank forms a cooling water circulation circuit through a water pump and a radiator;
还包括副蒸发器，该副蒸发器的一个制冷剂端口同时连接所述四通阀和气液分离器，另一个制冷剂端口连接到所述室内机换热器第二端与室外机换热器第一端之间的管路上；该副蒸发器的水路的两端分别与所述散热器的两端相连；所述室外机换热器第一端与所述油分离器的出口相连。It also includes a sub-evaporator. One refrigerant port of the sub-evaporator is connected to the four-way valve and the gas-liquid separator at the same time, and the other refrigerant port is connected to the second end of the indoor unit heat exchanger and the outdoor unit heat exchanger On the pipeline between the first ends; the two ends of the water path of the auxiliary evaporator are respectively connected with the two ends of the radiator; the first end of the outdoor unit heat exchanger is connected with the outlet of the oil separator.
进一步的，还包括恒温器，其进口A与所述冷却水箱的一端相连，其出口B与所述散热器的一端相连，其出口C与所述副蒸发器的一个水路端口相连。Further, it also includes a thermostat, the inlet A of which is connected to one end of the cooling water tank, the outlet B of which is connected to one end of the radiator, and the outlet C of which is connected to a waterway port of the secondary evaporator.
进一步的，还包括第一电子膨胀阀和第二电子膨胀阀；所述第一电子膨胀阀设于所述室内机换热器第二端与所述室外机换热器第一端之间的管路上；所述第二电子膨胀阀设于所述副蒸发器与所述室内机换热器第二端之间的管路上。Further, it also includes a first electronic expansion valve and a second electronic expansion valve; the first electronic expansion valve is provided between the second end of the indoor unit heat exchanger and the first end of the outdoor unit heat exchanger. On the pipeline; the second electronic expansion valve is arranged on the pipeline between the secondary evaporator and the second end of the indoor unit heat exchanger.
进一步的，还包括第一电磁阀、第二电磁阀和第三电磁阀，所述第一电磁阀设于所述室内机换热器第二端与所述室外机换热器第二端之间的管路上；所述第二电磁阀设于所述室外机换热器第二端与所述四通阀之间的管路上；所述第三电磁阀设于所述室外机换热器第一端与所述油分离器出口之间的管路上。Further, it also includes a first solenoid valve, a second solenoid valve, and a third solenoid valve. The first solenoid valve is located between the second end of the indoor unit heat exchanger and the second end of the outdoor unit heat exchanger. The second solenoid valve is provided on the pipeline between the second end of the outdoor unit heat exchanger and the four-way valve; the third solenoid valve is provided on the outdoor unit heat exchanger On the pipeline between the first end and the outlet of the oil separator.
进一步的，所述散热器与所述室外机换热器并排设置，且紧密靠近。Further, the radiator and the outdoor unit heat exchanger are arranged side by side and closely close to each other.
本发明的有益效果：The beneficial effects of the present invention:
本发明设计合理，结构紧凑，使用方便，可以利用部分制冷剂进行除霜工作，避免了以往必须停机除霜而给用户带来的不良影响，提高了使用的舒适性。同时，还可充分利用燃气发动机所产生的热量，与室外机换热器进行换热，提高空调系统的运行效率，充分满足制热的需要。The invention is reasonable in design, compact in structure, convenient to use, and can use part of the refrigerant to perform defrosting work, avoids the adverse effects on users that must be stopped for defrosting in the past, and improves the comfort of use. At the same time, it can also make full use of the heat generated by the gas engine to exchange heat with the outdoor unit heat exchanger to improve the operating efficiency of the air conditioning system and fully meet the heating needs.
附图说明Description of the drawings
图1为本发明的系统图。Figure 1 is a system diagram of the present invention.
其中：1-压缩机，2-油分离器，3-四通阀，4-室内机换热器,5-室内机电子膨胀阀，6-第一电子膨胀阀，7-室外机换热器，8-气液分离器，9-燃气发动机，10-冷却水箱,11-散热器，12-水泵,13-恒温器，14-副蒸发器，15-第二电子膨胀阀，16-第一电磁阀，17-第三电磁阀，18-第二电磁阀，19-皮带。Among them: 1- compressor, 2- oil separator, 3- four-way valve, 4- indoor unit heat exchanger, 5- indoor unit electronic expansion valve, 6-first electronic expansion valve, 7- outdoor unit heat exchanger , 8-gas-liquid separator, 9-gas engine, 10-cooling water tank, 11-radiator, 12-water pump, 13-thermostat, 14-sub evaporator, 15-second electronic expansion valve, 16-first Solenoid valve, 17-third solenoid valve, 18-second solenoid valve, 19-belt.
具体实施方式detailed description
下面结合附图和实施例对本发明作进一步的说明。The present invention will be further described below in conjunction with the drawings and embodiments.
如图1所示。As shown in Figure 1.
一种除霜不停机的燃气热泵空调系统，包括由压缩机1、油分离器2、四通阀3、室内机换热器4、室外机换热器7和气液分离器8依序连接而构成的制冷剂循环回路，具体为：压缩机1的排气口依次经过油分离器2和四通阀3后连接到室内机换热器4的第一端，然后，从该室内机换热器4的第二端连接到室外机换热器7的第一端，再从该室外机换热器7的第二端经所述四通阀3后连接到气液分离器8的入口，最后，从该气液分离器8的出口连接到所述压缩机1的吸气口，形成完整的制冷剂循环回路。其中，所述室内机换热器4可以为多个并联，且每个室内机换热器4上均设有一个室内机电子膨胀阀5，便于灵活控制。所述室外机换热器7第一端与所述油分离器2的出口相连。A defrosting non-stop gas heat pump air conditioning system, comprising a compressor 1, an oil separator 2, a four-way valve 3, an indoor unit heat exchanger 4, an outdoor unit heat exchanger 7 and a gas-liquid separator 8 connected in sequence The refrigerant circulation circuit constituted is specifically: the exhaust port of the compressor 1 passes through the oil separator 2 and the four-way valve 3 in turn, and is connected to the first end of the indoor unit heat exchanger 4, and then heat exchange from the indoor unit The second end of the heat exchanger 4 is connected to the first end of the outdoor unit heat exchanger 7, and the second end of the outdoor unit heat exchanger 7 is connected to the inlet of the gas-liquid separator 8 through the four-way valve 3, Finally, the outlet of the gas-liquid separator 8 is connected to the suction port of the compressor 1 to form a complete refrigerant circulation circuit. Wherein, the indoor unit heat exchanger 4 may be multiple in parallel, and each indoor unit heat exchanger 4 is provided with an indoor unit electronic expansion valve 5, which is convenient for flexible control. The first end of the outdoor unit heat exchanger 7 is connected to the outlet of the oil separator 2.
所述压缩机1为皮带驱动式，通过皮带19与燃气发动机9相连；该燃气发动机9的外部设有冷却水箱10，以便有效的对该燃气发动机9进行及时冷却。该冷却水箱10还通过水泵12与散热器11构成冷却水循环回路，使受热后的冷却水经水泵12进入所述散热器11 中进行降温，然后再流回所述冷却水箱10后重复使用，节能环保。The compressor 1 is belt-driven, and is connected to the gas engine 9 through a belt 19; a cooling water tank 10 is provided outside the gas engine 9 to effectively cool the gas engine 9 in time. The cooling water tank 10 also forms a cooling water circulation circuit through the water pump 12 and the radiator 11, so that the heated cooling water enters the radiator 11 through the water pump 12 for cooling, and then flows back to the cooling water tank 10 for repeated use, which saves energy. Environmental protection.
本发明还包括副蒸发器14，该副蒸发器14的一个制冷剂端口同时连接所述四通阀3和气液分离器8的进口，另一个制冷剂端口连接到所述室内机换热器4第二端与室外机换热器7第一端之间的管路上；该副蒸发器14的水路的两端分别与所述散热器11的两端相连，可充分利用冷却水进行换热，提高使用效率。The present invention also includes a secondary evaporator 14. One refrigerant port of the secondary evaporator 14 is simultaneously connected to the four-way valve 3 and the inlet of the gas-liquid separator 8, and the other refrigerant port is connected to the indoor unit heat exchanger 4 On the pipeline between the second end and the first end of the outdoor unit heat exchanger 7; the two ends of the water path of the auxiliary evaporator 14 are respectively connected to the two ends of the radiator 11, which can make full use of cooling water for heat exchange, Improve usage efficiency.
本发明还包括恒温器13，其进口A与所述冷却水箱10的一端相连，其出口B与所述散热器11的一端相连，其出口C与所述副蒸发器14的一个水路端口相连，可以根据冷却水温度自动调节所述出口B和所述出口C的流量，即，当冷却水温≤70℃时，所述出口B的开度最小，所述出口C的开度最大；当冷却水温度＞70℃时，所述出口B逐渐开大，所述出口C的开度逐渐减小；当冷却水温＞85℃时，所述出口B开至最大，所述出口C的开度最小。通过该恒温器13的调节，可以使冷却水得到充分有效的使用，并保证系统的正常运行。The present invention also includes a thermostat 13 whose inlet A is connected to one end of the cooling water tank 10, its outlet B is connected to one end of the radiator 11, and its outlet C is connected to a water port of the secondary evaporator 14, The flow rate of the outlet B and the outlet C can be automatically adjusted according to the cooling water temperature, that is, when the cooling water temperature is ≤70°C, the opening of the outlet B is the smallest, and the opening of the outlet C is the largest; when the cooling water When the temperature is greater than 70°C, the outlet B gradually opens, and the opening degree of the outlet C gradually decreases; when the cooling water temperature is greater than 85°C, the outlet B opens to the maximum, and the opening degree of the outlet C is the smallest. Through the adjustment of the thermostat 13, the cooling water can be used fully and effectively and the normal operation of the system can be ensured.
本发明还包括第一电子膨胀阀6和第二电子膨胀阀15，以便控制各管路中的制冷剂状态；所述第一电子膨胀阀6设于所述室内机换热器4第二端与所述室外机换热器7第一端之间的管路上；所述第二电子膨胀阀15设于所述副蒸发器14与所述室内机换热器4第二端之间的管路上。The present invention also includes a first electronic expansion valve 6 and a second electronic expansion valve 15 to control the state of the refrigerant in each pipeline; the first electronic expansion valve 6 is provided at the second end of the indoor unit heat exchanger 4 And the first end of the outdoor unit heat exchanger 7; the second electronic expansion valve 15 is provided in the pipe between the auxiliary evaporator 14 and the second end of the indoor unit heat exchanger 4 On the way.
本发明中还包括第一电磁阀16、第二电磁阀18和第三电磁阀17，所述第一电磁阀16设于所述室内机换热器4第二端与所述室外机换热器7第二端之间的管路上；所述第二电磁阀18设于所述室外机换热器4第二端与所述四通阀3之间的管路上；所述第三电磁阀17设于所述室外机换热器7第一端与所述油分离器2出口之间的管路上。从而，可方便的控制各段管路的通断。The present invention also includes a first solenoid valve 16, a second solenoid valve 18, and a third solenoid valve 17. The first solenoid valve 16 is arranged at the second end of the indoor unit heat exchanger 4 to exchange heat with the outdoor unit. The second solenoid valve 18 is provided on the pipeline between the second end of the outdoor unit heat exchanger 4 and the four-way valve 3; the third solenoid valve 17 is arranged on the pipeline between the first end of the outdoor unit heat exchanger 7 and the outlet of the oil separator 2. Thus, the on-off of each section of pipeline can be conveniently controlled.
进一步的，所述散热器11与所述室外机换热器7并排设置，且紧密靠近，通常为0-5mm，可以使两者之间进行充分的换热，提高冷却水的利用率。Further, the radiator 11 and the outdoor unit heat exchanger 7 are arranged side by side, and are close to each other, usually 0-5 mm, so that sufficient heat exchange can be performed between the two and the utilization rate of cooling water can be improved.
所述燃气发动机可选用3GPH88。所述压缩机可以选用GHP5212MY2。The gas engine can choose 3GPH88. The compressor can be GHP5212MY2.
本发明的运行过程为：The operation process of the present invention is:
当系统制热运行时，所述第二电磁阀和所述第一电子膨胀阀处于打开状态，同时，所述第一电磁阀、第三所述电磁阀和所述第二电子膨胀阀处于关闭状态。此时，制冷剂由所述压缩机压缩成高温高压的气态制冷剂，依次经过所述油分离器和所述四通阀后进入所述室内机换热器中冷凝成高温高压的液态制冷剂，再经过所述室内机电子膨胀阀后由所述第一电子膨胀阀节流成低温低压的气液两相态制冷剂，并在所述室外机换热器中同时与所述散热器和空气进 行换热，蒸发成低温低压的气态制冷剂，然后，流入所述气液分离器中，并分离成气态和液态制冷剂，最后，气态制冷剂回到所述压缩机后重新进行循环。When the system is heating, the second solenoid valve and the first electronic expansion valve are in an open state, and at the same time, the first solenoid valve, the third solenoid valve, and the second electronic expansion valve are closed status. At this time, the refrigerant is compressed by the compressor into a high-temperature and high-pressure gaseous refrigerant, passes through the oil separator and the four-way valve in turn, enters the indoor unit heat exchanger and condenses into a high-temperature and high-pressure liquid refrigerant , And after passing through the indoor unit electronic expansion valve, the first electronic expansion valve is throttled into a low-temperature and low-pressure gas-liquid two-phase refrigerant, which is simultaneously combined with the radiator and the radiator in the outdoor unit heat exchanger The air undergoes heat exchange and evaporates into a low-temperature and low-pressure gaseous refrigerant, and then flows into the gas-liquid separator and is separated into gaseous and liquid refrigerants. Finally, the gaseous refrigerant returns to the compressor and circulates again.
当系统除霜运行时，所述第二电磁阀和所述第一电子膨胀阀处于关闭状态，同时，所述第一电磁阀、所述第三电磁阀和所述第二电子膨胀阀均处于打开状态。此时，制冷剂由所述压缩机压缩成高温高压的气态制冷剂，经过所述油分离器后，一部分制冷剂通过所述四通阀进入所述室内机换热器，冷凝成高温高压的液态制冷剂I；另一部分制冷剂通过所述第三电磁阀后进入所述室外机换热器，冷凝成高温高压的液态制冷剂II，再经过所述第一电磁阀后，与所述液态制冷剂I相混合，再经过所述第二电子膨胀阀节流成低温低压的气液两相态制冷剂，并在所述副蒸发器中与来自冷却水箱的高温冷却水进行换热，蒸发成低温低压的气态制冷剂，然后，再流入所述气液分离器分离成气态和液态制冷剂，最后，气态制冷剂回到所述压缩机，重新开始循环。When the system is defrosting, the second solenoid valve and the first electronic expansion valve are in a closed state, and at the same time, the first solenoid valve, the third solenoid valve, and the second electronic expansion valve are all in a closed state. Open state. At this time, the refrigerant is compressed by the compressor into a high-temperature and high-pressure gaseous refrigerant. After passing through the oil separator, a part of the refrigerant enters the indoor unit heat exchanger through the four-way valve and condenses into high-temperature and high-pressure gaseous refrigerant. Liquid refrigerant I; another part of the refrigerant enters the outdoor unit heat exchanger after passing through the third solenoid valve, condenses into a high-temperature and high-pressure liquid refrigerant II, and after passing through the first solenoid valve, and the liquid The refrigerant I is mixed, and then throttled by the second electronic expansion valve into a low-temperature and low-pressure gas-liquid two-phase refrigerant, and exchanges heat with the high-temperature cooling water from the cooling water tank in the secondary evaporator to evaporate It becomes a low-temperature and low-pressure gaseous refrigerant, and then flows into the gas-liquid separator to be separated into gaseous and liquid refrigerants. Finally, the gaseous refrigerant returns to the compressor to restart the cycle.
本发明在除霜运行时，制冷剂既可以进入室内机制热，又可以进入室外机除霜，无需切换四通阀转换制冷模式来进行除霜，避免了以往必须停机除霜带来的不利影响，极大的改善了用户的感受，同时，也提高了系统的运行效率。During the defrosting operation of the present invention, the refrigerant can not only enter the indoor mechanism to heat, but also enter the outdoor unit for defrosting, without switching the four-way valve to switch the refrigeration mode for defrosting, avoiding the adverse effects of the previous need to stop defrosting , Which greatly improves the user experience, and at the same time, also improves the operating efficiency of the system.
本发明未涉及部分均与现有技术相同或可采用现有技术加以实现。The parts not involved in the present invention are the same as the prior art or can be implemented by the prior art.

Claims (5)

  1. 一种除霜不停机的燃气热泵空调系统，包括由压缩机、油分离器、四通阀、室内机换热器、室外机换热器和气液分离器依序连接而构成的制冷剂循环回路，A defrosting and non-stop gas heat pump air conditioning system, comprising a refrigerant circulation loop composed of a compressor, an oil separator, a four-way valve, an indoor unit heat exchanger, an outdoor unit heat exchanger, and a gas-liquid separator connected in sequence ,
    其特征是所述压缩机通过皮带与燃气发动机相连；该燃气发动机的外部设有冷却水箱；该冷却水箱通过水泵与散热器构成冷却水循环回路；It is characterized in that the compressor is connected to the gas engine through a belt; a cooling water tank is arranged outside the gas engine; the cooling water tank forms a cooling water circulation circuit through a water pump and a radiator;
    还包括副蒸发器，该副蒸发器的一个制冷剂端口同时连接所述四通阀和气液分离器，另一个制冷剂端口连接到所述室内机换热器第二端与室外机换热器第一端之间的管路上；该副蒸发器的水路的两端分别与所述散热器的两端相连；所述室外机换热器第一端与所述油分离器的出口相连。It also includes a sub-evaporator. One refrigerant port of the sub-evaporator is connected to the four-way valve and the gas-liquid separator at the same time, and the other refrigerant port is connected to the second end of the indoor unit heat exchanger and the outdoor unit heat exchanger On the pipeline between the first ends; the two ends of the water path of the auxiliary evaporator are respectively connected with the two ends of the radiator; the first end of the outdoor unit heat exchanger is connected with the outlet of the oil separator.
  2. 根据权利要求1所述的除霜不停机的燃气热泵空调系统，其特征是还包括恒温器，其进口A与所述冷却水箱的一端相连，其出口B与所述散热器的一端相连，其出口C与所述副蒸发器的一个水路端口相连。The defrosting non-stop gas heat pump air conditioning system according to claim 1, characterized in that it further comprises a thermostat, the inlet A of which is connected to one end of the cooling water tank, and the outlet B of which is connected to one end of the radiator. The outlet C is connected to a water port of the secondary evaporator.
  3. 根据权利要求1所述的除霜不停机的燃气热泵空调系统，其特征是还包括第一电子膨胀阀和第二电子膨胀阀；所述第一电子膨胀阀设于所述室内机换热器第二端与所述室外机换热器第一端之间的管路上；所述第二电子膨胀阀设于所述副蒸发器与所述室内机换热器第二端之间的管路上。The defrosting non-stop gas heat pump air conditioning system according to claim 1, characterized in that it further comprises a first electronic expansion valve and a second electronic expansion valve; the first electronic expansion valve is provided in the indoor unit heat exchanger On the pipeline between the second end and the first end of the outdoor unit heat exchanger; the second electronic expansion valve is arranged on the pipeline between the auxiliary evaporator and the second end of the indoor unit heat exchanger .
  4. 根据权利要求1所述的除霜不停机的燃气热泵空调系统，其特征是还包括第一电磁阀、第二电磁阀和第三电磁阀，所述第一电磁阀设于所述室内机换热器第二端与所述室外机换热器第二端之间的管路上；所述第二电磁阀设于所述室外机换热器第二端与所述四通阀之间的管路上；所述第三电磁阀设于所述室外机换热器第一端与所述油分离器出口之间的管路上。The gas heat pump air conditioning system with non-stop defrosting according to claim 1, characterized in that it further comprises a first solenoid valve, a second solenoid valve and a third solenoid valve, the first solenoid valve is provided in the indoor unit On the pipeline between the second end of the heat exchanger and the second end of the outdoor unit heat exchanger; the second solenoid valve is arranged in the pipe between the second end of the outdoor unit heat exchanger and the four-way valve On the road; the third solenoid valve is provided on the pipeline between the first end of the outdoor unit heat exchanger and the outlet of the oil separator.
  5. 根据权利要求1所述的除霜不停机的燃气热泵空调系统，其特征是所述散热器与所述室外机换热器并排设置，且紧密靠近。The gas heat pump air-conditioning system with non-stop defrosting according to claim 1, wherein the radiator and the outdoor unit heat exchanger are arranged side by side and closely close to each other.
PCT/CN2019/100244 2019-03-04 2019-08-12 Gas heat pump air-conditioning system having non-stop defrosting WO2020177275A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910161098.1 2019-03-04
CN201910161098.1A CN109990499B (en) 2019-03-04 2019-03-04 Gas heat pump air conditioning system without shutdown during defrosting

Publications (1)

Publication Number Publication Date
WO2020177275A1 true WO2020177275A1 (en) 2020-09-10

Family

ID=67129576

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/100244 WO2020177275A1 (en) 2019-03-04 2019-08-12 Gas heat pump air-conditioning system having non-stop defrosting

Country Status (2)

Country Link
CN (1) CN109990499B (en)
WO (1) WO2020177275A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109990499B (en) * 2019-03-04 2021-02-19 南京天加环境科技有限公司 Gas heat pump air conditioning system without shutdown during defrosting
CN110793096B (en) * 2019-11-29 2024-07-23 宁波奥克斯电气股份有限公司 Air conditioning unit and control method and control device thereof
CN113432350A (en) * 2020-03-20 2021-09-24 青岛海尔空调电子有限公司 Pipeline oil cleaning device for air conditioning system and air conditioning system
CN112815569B (en) * 2021-01-14 2022-04-26 中科广能能源研究院(重庆)有限公司 Gas heat pump cold and hot water unit air conditioning system and control method thereof
CN114543387A (en) * 2022-02-25 2022-05-27 南京天加环境科技有限公司 Gas heat pump system capable of improving defrosting efficiency and control method thereof
CN114719458A (en) * 2022-04-08 2022-07-08 哈尔滨工业大学 Quasi-second-stage compression gas heat pump unit suitable for air supplement adjustable type in severe cold area
CN115307338B (en) * 2022-08-12 2023-12-01 南京天加环境科技有限公司 Heat recovery device of gas heat pump and control method

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02140572A (en) * 1988-11-18 1990-05-30 Sanyo Electric Co Ltd Heat pump type refrigerating plant
JPH0439578A (en) * 1990-06-04 1992-02-10 Aisin Seiki Co Ltd Engine-driven air-conditioner
JPH04203865A (en) * 1990-11-30 1992-07-24 Mitsubishi Electric Corp Engine-driven heat pump device
JPH06265242A (en) * 1993-03-11 1994-09-20 Nippondenso Co Ltd Engine driven heat pump
CN1395074A (en) * 2001-06-26 2003-02-05 三菱重工业株式会社 Multi-style gas heat pump type air conditioner
CN1884940A (en) * 2005-06-22 2006-12-27 海尔集团公司 Defrosting device for engine driven air compressor
CN101000182A (en) * 2006-12-31 2007-07-18 春兰(集团)公司 Gas heat pump air conditioner and its operation control method
CN101012989A (en) * 2006-09-13 2007-08-08 东南大学 Gas engine driven heat pump defrosting device
JP5907812B2 (en) * 2011-09-09 2016-04-26 大阪瓦斯株式会社 Heat pump system and operation method thereof
CN106440501A (en) * 2016-11-18 2017-02-22 天津城建大学 Running method of heat pump unit of energy-self-supplied gas engine
CN107621094A (en) * 2017-09-29 2018-01-23 中国科学院广州能源研究所 A kind of oil gas dual-fuel cool and thermal power air-conditioning heat pump device
CN107763772A (en) * 2017-10-26 2018-03-06 中国科学院广州能源研究所 A kind of gas-fired heat pump waste heat automatic defrosting system
CN108731295A (en) * 2018-06-13 2018-11-02 成都爱信智能技术有限责任公司 A kind of recuperation of heat Gas Air Conditioner System
CN109990499A (en) * 2019-03-04 2019-07-09 南京天加环境科技有限公司 A kind of non-stop-machine combustion-gas thermal pump air-conditioning system of defrosting

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02140572A (en) * 1988-11-18 1990-05-30 Sanyo Electric Co Ltd Heat pump type refrigerating plant
JPH0439578A (en) * 1990-06-04 1992-02-10 Aisin Seiki Co Ltd Engine-driven air-conditioner
JPH04203865A (en) * 1990-11-30 1992-07-24 Mitsubishi Electric Corp Engine-driven heat pump device
JPH06265242A (en) * 1993-03-11 1994-09-20 Nippondenso Co Ltd Engine driven heat pump
CN1395074A (en) * 2001-06-26 2003-02-05 三菱重工业株式会社 Multi-style gas heat pump type air conditioner
CN1884940A (en) * 2005-06-22 2006-12-27 海尔集团公司 Defrosting device for engine driven air compressor
CN101012989A (en) * 2006-09-13 2007-08-08 东南大学 Gas engine driven heat pump defrosting device
CN101000182A (en) * 2006-12-31 2007-07-18 春兰(集团)公司 Gas heat pump air conditioner and its operation control method
JP5907812B2 (en) * 2011-09-09 2016-04-26 大阪瓦斯株式会社 Heat pump system and operation method thereof
CN106440501A (en) * 2016-11-18 2017-02-22 天津城建大学 Running method of heat pump unit of energy-self-supplied gas engine
CN107621094A (en) * 2017-09-29 2018-01-23 中国科学院广州能源研究所 A kind of oil gas dual-fuel cool and thermal power air-conditioning heat pump device
CN107763772A (en) * 2017-10-26 2018-03-06 中国科学院广州能源研究所 A kind of gas-fired heat pump waste heat automatic defrosting system
CN108731295A (en) * 2018-06-13 2018-11-02 成都爱信智能技术有限责任公司 A kind of recuperation of heat Gas Air Conditioner System
CN109990499A (en) * 2019-03-04 2019-07-09 南京天加环境科技有限公司 A kind of non-stop-machine combustion-gas thermal pump air-conditioning system of defrosting

Also Published As

Publication number Publication date
CN109990499A (en) 2019-07-09
CN109990499B (en) 2021-02-19

Similar Documents

Publication Publication Date Title
WO2020177275A1 (en) Gas heat pump air-conditioning system having non-stop defrosting
WO2019128516A1 (en) Air conditioner system
WO2021169542A1 (en) Air conditioning system capable of performing continuous heating
WO2015158138A1 (en) Refrigeration device
WO2019091241A1 (en) Cooling circulation system for air conditioning, and air conditioner
WO2020073481A1 (en) Air conditioning system
CN112594871B (en) Defrosting control method of multifunctional multi-split system with double four-way valves
WO2019091240A1 (en) Heating circulation system for air conditioning, and air conditioner
WO2021088355A1 (en) Direct-expansion air-conditioning system capable of performing ultralow-temperature cooling operation
CN203964436U (en) Two-stage compression air conditioning system
CN114543387A (en) Gas heat pump system capable of improving defrosting efficiency and control method thereof
CN207963223U (en) Heat pump air conditioning system
US20230101537A1 (en) Heat pump
CN103528136A (en) Fresh air handling unit and control system thereof
WO2021098552A1 (en) Heat pump type air-conditioning system and control method therefor
CN116123744B (en) Ultralow-temperature single-stage and double-stage hybrid air source heat pump unit
WO2019128517A1 (en) Air-conditioner system
CN108679716B (en) Heat exchange system
WO2019128518A1 (en) Air conditioner system
CN206514563U (en) Air conditioning system unit and air conditioning system
CN213334690U (en) Double-evaporation-temperature heat pump system
CN209877206U (en) Fresh air dehumidification reheating system
CN109282520B (en) Vortex tube and compression type combined direct expansion air conditioning system and control method
CN201964611U (en) Commercial ultra-low temperature heat pump water heater unit
CN220524386U (en) Double-cooling combined heat pump unit

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19917615

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19917615

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 19917615

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 18/03/2022)

122 Ep: pct application non-entry in european phase

Ref document number: 19917615

Country of ref document: EP

Kind code of ref document: A1