CN108362032A - A kind of net for air-source heat pump units of continuous heat supply - Google Patents
A kind of net for air-source heat pump units of continuous heat supply Download PDFInfo
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- CN108362032A CN108362032A CN201810298953.9A CN201810298953A CN108362032A CN 108362032 A CN108362032 A CN 108362032A CN 201810298953 A CN201810298953 A CN 201810298953A CN 108362032 A CN108362032 A CN 108362032A
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- 238000010257 thawing Methods 0.000 claims abstract description 197
- 230000007246 mechanism Effects 0.000 claims abstract description 135
- 238000010438 heat treatment Methods 0.000 claims abstract description 129
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims description 43
- 230000002457 bidirectional effect Effects 0.000 claims description 42
- 238000005057 refrigeration Methods 0.000 claims description 25
- 238000001816 cooling Methods 0.000 claims description 17
- 238000010079 rubber tapping Methods 0.000 claims 5
- 238000000605 extraction Methods 0.000 abstract description 3
- 239000003507 refrigerant Substances 0.000 description 42
- BYUKRKALWSMYBW-UHFFFAOYSA-N O.[F] Chemical compound O.[F] BYUKRKALWSMYBW-UHFFFAOYSA-N 0.000 description 23
- 230000000694 effects Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
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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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control 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
- 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
- F25B2313/0253—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel arrangements
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2519—On-off valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
本发明涉及一种连续供热的空气源热泵机组，包括压缩机单元、室内水换热单元、室外空气换热单元以及融霜分路单元；采用全新的多分路式取热与轮动式融霜技术方案，将空气源热泵机组室外空气换热器设置为至少两个可独立运行的分路取热与融霜系统，对每一路独立的室外空气换热系统均单独分别设置一个制热分路和融霜分路，通过电磁阀和电子膨胀阀的开闭、单向阀等管路和管件实现融霜工况和制热工况的切换。其中一路氟‑空气换热机构进行融霜的同时不影响其他分路氟‑空气换热机构分路制热工况的运行，逐一轮动地对每个分路的氟‑空气换热机构进行融霜操作，从而实现轮动精准融霜和连续供热。
The invention relates to an air source heat pump unit for continuous heating, which includes a compressor unit, an indoor water heat exchange unit, an outdoor air heat exchange unit, and a defrosting branch unit; Frost technology scheme, the outdoor air heat exchanger of the air source heat pump unit is set as at least two independent heat extraction and defrosting systems, and a separate heating branch is set for each independent outdoor air heat exchange system. Switching between defrosting and heating conditions is realized through the solenoid valve and electronic expansion valve opening and closing, check valve and other pipelines and fittings. One of the fluorine-air heat exchange mechanisms defrosts without affecting the operation of the other branch fluorine-air heat exchange mechanisms in the heating condition, and the fluorine-air heat exchange mechanisms of each branch are rotated one by one Defrost operation, so as to achieve precise defrosting and continuous heating.
Description
技术领域technical field
本发明涉及一种空气源热泵机组，特别是涉及一种连续供热的空气源热泵机组。The invention relates to an air source heat pump unit, in particular to an air source heat pump unit for continuous heat supply.
背景技术Background technique
空气源热泵是一种利用高位能使热量从低位热源空气流向高位热源的节能装置，它是热泵的一种形式。空气源热泵适用范围广泛，一年四季都能够运行，无需专人看守，运行成本低，节能的效果非常突出，属于环保型的产品。其在运行过程中没有污染物的排放，同时也不会对人体造成损害，拥有良好的社会效益，因此在我国冬冷夏热地区采暖、制冷中得到广泛的应用。The air source heat pump is an energy-saving device that uses high-level energy to make heat flow from low-level heat source air to high-level heat source. It is a form of heat pump. The air source heat pump has a wide range of applications, can run all year round, does not need special personnel to guard, has low operating costs, and has outstanding energy-saving effects. It is an environmentally friendly product. It does not emit pollutants during operation, and at the same time, it will not cause damage to the human body, and has good social benefits. Therefore, it is widely used in heating and cooling in cold winter and hot summer areas in my country.
空气源热泵机组冬季运行时，当室外侧空气换热器表面温度低于周围空气的露点温度且低于0℃时，换热器表面就会结霜。霜的形成使得换热器传热效果恶化，且增加了空气流动阻力，使得机组的供热能力降低，严重时机组会停止运行影响热泵机组供热。空气源热泵冬季室外换热器结霜与融霜是目前制约其应用和发展的关键共性问题。When the air source heat pump unit is running in winter, when the surface temperature of the outdoor air heat exchanger is lower than the dew point temperature of the surrounding air and lower than 0°C, frost will form on the surface of the heat exchanger. The formation of frost deteriorates the heat transfer effect of the heat exchanger and increases the air flow resistance, which reduces the heating capacity of the unit. In severe cases, the unit will stop running and affect the heat supply of the heat pump unit. The frosting and defrosting of the outdoor heat exchanger of the air source heat pump in winter is the key common problem restricting its application and development.
目前，空气源热泵的融霜方式通常有：自然融霜法、逆循环融霜法、电融霜法等。而在实际效果来看，这些常规的方法都存在着不足和缺陷，无法实现融霜工况的连续供热，往往会造成压缩机的频繁启停以及四通换向阀的频繁切换，也会造成热泵供水温度波动，影响室内供热效果等。At present, the defrosting methods of air source heat pumps usually include: natural defrosting method, reverse cycle defrosting method, electric defrosting method, etc. In terms of actual effect, these conventional methods have deficiencies and defects, and cannot realize continuous heating under defrosting conditions, often resulting in frequent start and stop of compressors and frequent switching of four-way reversing valves, and also The temperature of the water supplied by the heat pump will fluctuate, which will affect the indoor heating effect.
发明内容Contents of the invention
本发明的目的是针对现有空气源热泵无法实现融霜工况的连续供热问题，提出一种连续供热的空气源热泵机组。The object of the present invention is to propose an air source heat pump unit for continuous heat supply in order to solve the problem that the existing air source heat pump cannot realize the continuous heat supply under the defrosting working condition.
为实现上述目的，本发明提供了一种连续供热的空气源热泵机组，包括压缩机、与所述压缩机相连的氟-水换热器、室外空气换热单元以及融霜分路单元；To achieve the above object, the present invention provides an air source heat pump unit for continuous heating, including a compressor, a fluorine-water heat exchanger connected to the compressor, an outdoor air heat exchange unit, and a defrosting branch unit;
所述室外空气换热单元包括至少两组并联设置的氟-空气换热机构，所述氟-空气换热机构包括氟-空气换热器、并联设置在所述氟-空气换热器上的制热分路与融霜分路，所述制热分路上设有分路制热电子膨胀阀，所述融霜分路上设有分路融霜电磁阀；The outdoor air heat exchange unit includes at least two sets of fluorine-air heat exchange mechanisms arranged in parallel, and the fluorine-air heat exchange mechanisms include fluorine-air heat exchangers, The heating branch and the defrosting branch, the heating branch is provided with a branch heating electronic expansion valve, and the defrosting branch is provided with a branch defrosting electromagnetic valve;
所述融霜分路单元包括与所述氟-水换热器并联的融霜通路，所述融霜通路上设有双向导流机构，所述双向导流机构的回液侧分路分别与所述融霜分路相连，所述双向导流机构的出液侧分路分别与所述制热分路相连；The defrosting branch unit includes a defrosting path connected in parallel with the fluorine-water heat exchanger, and a bidirectional flow guide mechanism is provided on the defrosting path, and the liquid return side shunt of the bidirectional flow guiding mechanism is respectively connected to the The defrosting shunts are connected, and the outlet side shunts of the bidirectional flow guide mechanism are respectively connected with the heating shunts;
所述空气源热泵机组在融霜时，每次至少对其中一组氟-空气换热机构进行融霜，依次流经融霜通路、其中至少一条融霜分路中的制冷工质与经氟-水换热器换热后的制冷工质在双向导流机构的回液侧混流，并经双向导流机构的出液侧分路分别流向剩余氟-空气换热机构中的制热分路。When defrosting, the air source heat pump unit defrosts at least one of the fluorine-air heat exchange mechanisms each time, and flows through the defrosting passage, the refrigerant in at least one of the defrosting branches and the refrigerant through the fluorine -The refrigerant after heat exchange in the water heat exchanger is mixed in the liquid return side of the bidirectional flow guide mechanism, and flows to the heating branch in the remaining fluorine-air heat exchange mechanism through the outlet side branch of the bidirectional flow guide mechanism .
优选地，所述室外空气换热单元还包括设置在所述氟-空气换热器上的风机。Preferably, the outdoor air heat exchange unit further includes a fan provided on the fluorine-air heat exchanger.
优选地，所述空气源热泵机组在融霜时，每次对其中一组氟-空气换热机构进行融霜，逐一轮动地对每一组氟-空气换热机构进行融霜操作。Preferably, when defrosting, the air source heat pump unit defrosts one group of fluorine-air heat exchange mechanisms each time, and defrosts each group of fluorine-air heat exchange mechanisms one by one in rotation.
本发明还提供了一种连续供热的空气源热泵机组，包括压缩机单元、室内水换热单元、室外空气换热单元以及融霜分路单元；The present invention also provides an air source heat pump unit for continuous heating, including a compressor unit, an indoor water heat exchange unit, an outdoor air heat exchange unit, and a defrosting branch unit;
所述压缩机单元包括依次连接的气液分离器、压缩机、油分离器、连接机构；The compressor unit includes a gas-liquid separator, a compressor, an oil separator, and a connecting mechanism connected in sequence;
所述室内水换热单元包括与所述连接机构相连接的氟-水换热器，所述氟-水换热器上设有水出口和水入口；The indoor water heat exchange unit includes a fluorine-water heat exchanger connected to the connection mechanism, and the fluorine-water heat exchanger is provided with a water outlet and a water inlet;
所述室外空气换热单元包括至少两组并联设置的氟-空气换热机构，所述氟-空气换热机构包括氟-空气换热器、并联设置在所述氟-空气换热器上的制热分路与融霜分路以及设置在所述氟-空气换热器上的风机，所述制热分路上设有分路制热电子膨胀阀和单向阀，所述融霜分路上设有分路融霜电磁阀；The outdoor air heat exchange unit includes at least two sets of fluorine-air heat exchange mechanisms arranged in parallel, and the fluorine-air heat exchange mechanisms include fluorine-air heat exchangers, The heating branch, the defrosting branch and the fan installed on the fluorine-air heat exchanger, the heating branch is equipped with a branch heating electronic expansion valve and a one-way valve, and the defrosting branch Equipped with bypass defrosting solenoid valve;
所述融霜分路单元包括设置在所述油分离器与连接机构之间的融霜通路，所述融霜通路上依次设有手动截止阀、融霜电磁阀、双向导流机构，所述融霜电磁阀与双向导流机构的回液侧之间分路分别与所述融霜分路相连，所述双向导流机构的出液侧与连接机构之间分路分别与所述制热分路相连；The defrosting branch unit includes a defrosting passage arranged between the oil separator and the connecting mechanism, and the defrosting passage is provided with a manual cut-off valve, a defrosting solenoid valve, and a bidirectional flow guide mechanism in sequence. The branch between the defrosting solenoid valve and the liquid return side of the two-way flow guide mechanism is connected to the defrosting branch respectively, and the branch between the liquid outlet side of the two-way flow guide mechanism and the connecting mechanism is respectively connected to the heating shunt connection;
所述空气源热泵机组在融霜时，每次至少对其中一组氟-空气换热机构进行融霜，依次流经融霜通路、其中至少一条融霜分路中的制冷工质与经氟-水换热器换热后的制冷工质在双向导流机构的回液侧混流，并经双向导流机构的出液侧分路分别流向剩余氟-空气换热机构中的制热分路。When defrosting, the air source heat pump unit defrosts at least one of the fluorine-air heat exchange mechanisms each time, and flows through the defrosting passage, the refrigerant in at least one of the defrosting branches and the refrigerant through the fluorine -The refrigerant after heat exchange in the water heat exchanger is mixed in the liquid return side of the bidirectional flow guide mechanism, and flows to the heating branch in the remaining fluorine-air heat exchange mechanism through the outlet side branch of the bidirectional flow guide mechanism .
优选地，所述连接机构为四通换向阀。Preferably, the connecting mechanism is a four-way reversing valve.
优选地，所述室内水换热单元还包括与所述氟-水换热器相连接的单向阀，所述单向阀进出口两侧并联设置有制冷通路，所述制冷通路上设有制冷电子膨胀阀以及与氟-水换热器相连接的单向阀反向设置的单向阀。Preferably, the indoor water heat exchange unit further includes a one-way valve connected to the fluorine-water heat exchanger, a refrigeration passage is arranged in parallel on both sides of the inlet and outlet of the one-way valve, and the refrigeration passage is provided with The refrigeration electronic expansion valve and the one-way valve connected with the fluorine-water heat exchanger are reversely set.
优选地，每一制热分路上分路制热电子膨胀阀和单向阀的两侧均并联设置有制冷分路，所述制冷分路上设有与所述分路制热电子膨胀阀相连的单向阀反向设置的单向阀。Preferably, a cooling branch is provided in parallel on both sides of the branch heating electronic expansion valve and the one-way valve on each heating branch, and a cooling branch connected to the branch heating electronic expansion valve is provided on the cooling branch. One-way valve A one-way valve that is set in reverse.
优选地，所述分路融霜电磁阀设置在所述融霜分路上的氟-空气换热器的制冷工质入口侧，所述融霜分路上的氟-空气换热器的制冷工质出口侧设有单向阀。Preferably, the bypass defrosting electromagnetic valve is arranged on the refrigerant inlet side of the fluorine-air heat exchanger on the defrosting branch, and the refrigerant of the fluorine-air heat exchanger on the defrosting branch A one-way valve is provided on the outlet side.
优选地，与所述融霜分路相连的双向导流机构的回液管路上设有单向阀与手动截止阀。Preferably, a one-way valve and a manual shut-off valve are provided on the liquid return line of the bidirectional flow guide mechanism connected to the defrosting branch.
优选地，所述双向导流机构的出液侧上设有单向阀，且所述双向导流机构的出液侧与回液侧之间并联设有制冷通路，所述制冷通路上设有单向阀。Preferably, a one-way valve is provided on the liquid outlet side of the bidirectional flow guide mechanism, and a refrigeration passage is provided in parallel between the liquid outlet side and the liquid return side of the bidirectional flow guide mechanism, and the refrigeration passage is provided with one-way valve.
优选地，在所述氟-空气换热器中，空气在风机的驱动下，依次通过制热分路、融霜分路。Preferably, in the fluorine-air heat exchanger, driven by the fan, the air passes through the heating branch and the defrosting branch in sequence.
优选地，所述空气源热泵机组在融霜时，每次对其中一组氟-空气换热机构进行融霜，逐一轮动地对每一组氟-空气换热机构进行融霜操作。Preferably, when defrosting, the air source heat pump unit defrosts one group of fluorine-air heat exchange mechanisms each time, and defrosts each group of fluorine-air heat exchange mechanisms one by one in rotation.
优选地，所述室外空气换热单元包括4～12组并联设置的氟-空气换热机构。Preferably, the outdoor air heat exchange unit includes 4 to 12 sets of fluorine-air heat exchange mechanisms arranged in parallel.
基于上述技术方案，本发明的优点是：Based on above-mentioned technical scheme, advantage of the present invention is:
1、本发明的空气源热泵机组中某分路融霜时不影响其他分路制热，热泵机组可实现系统的连续供热，避免现有空气源热泵机组融霜时通过四通换向阀使机组制冷与制热频繁切换，提升了热泵机组有效供热时间与冬季总供热量，改善了空气源热泵冬季供热效果；1. In the air source heat pump unit of the present invention, the defrosting of a certain branch does not affect the heating of other branches, and the heat pump unit can realize the continuous heating of the system, avoiding the defrosting of the existing air source heat pump unit through the four-way reversing valve Make the cooling and heating of the unit switch frequently, increase the effective heating time of the heat pump unit and the total heat supply in winter, and improve the heating effect of the air source heat pump in winter;
2、本发明的空气源热泵机组中的四通换向阀仅用于夏季制冷和冬季制热转换时切换，融霜操作时不需要切换，大大减少四通换向阀(包括压缩机)的开关(启停)次数，提升了空气源热泵机组的可靠性；2. The four-way reversing valve in the air source heat pump unit of the present invention is only used for switching between cooling in summer and heating in winter, and does not need to be switched during defrosting operation, which greatly reduces the cost of the four-way reversing valve (including the compressor). The number of switches (start and stop) improves the reliability of the air source heat pump unit;
3、本发明的空气源热泵机组中室外空气换热部分增设的融霜换热回路使系统的换热面积增大，热泵机组制冷与制热的能效比提高；3. The defrosting heat exchange circuit added to the outdoor air heat exchange part of the air source heat pump unit of the present invention increases the heat exchange area of the system, and improves the energy efficiency ratio of refrigeration and heating of the heat pump unit;
4、现有空气源热泵室外换热器的风机均为共用，采用启停一致方式，单风机的风量与噪音均较大，而本发明采用多分路空气换热器及其风机设计思路，降低了单风机的风量与噪声，机组整体噪音可较大幅度地降低。4. The fans of the outdoor heat exchanger of the existing air source heat pump are all shared, and the start and stop mode is adopted in a consistent manner. The air volume and noise of a single fan are reduced, and the overall noise of the unit can be greatly reduced.
附图说明Description of drawings
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:
图1为连续供热的空气源热泵机组原理示意图Figure 1 is a schematic diagram of the principle of an air source heat pump unit for continuous heating
图2为连续供热的空气源热泵机组系统示意图。Figure 2 is a schematic diagram of an air source heat pump unit system for continuous heating.
具体实施方式Detailed ways
下面通过附图和实施例，对本发明的技术方案做进一步的详细描述。The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.
实施例1Example 1
本发明提供了一种连续供热的空气源热泵机组，如图1所示，本发明的空气源热泵机组包括压缩机1、与所述压缩机1相连的氟-水换热器6、室外空气换热单元以及融霜分路单元；The present invention provides a continuous heating air source heat pump unit, as shown in Figure 1, the air source heat pump unit of the present invention includes a compressor 1, a fluorine-water heat exchanger 6 connected to the compressor 1, an outdoor Air heat exchange unit and defrosting branch unit;
所述室外空气换热单元包括至少两组并联设置的氟-空气换热机构，所述氟-空气换热机构包括氟-空气换热器、并联设置在所述氟-空气换热器上的制热分路与融霜分路，所述制热分路上设有分路制热电子膨胀阀，所述融霜分路上设有分路融霜电磁阀；The outdoor air heat exchange unit includes at least two sets of fluorine-air heat exchange mechanisms arranged in parallel, and the fluorine-air heat exchange mechanisms include fluorine-air heat exchangers, The heating branch and the defrosting branch, the heating branch is provided with a branch heating electronic expansion valve, and the defrosting branch is provided with a branch defrosting solenoid valve;
所述融霜分路单元包括与所述氟-水换热器6并联的融霜通路，所述融霜通路上设有双向导流机构10，所述双向导流机构10的回液侧分路分别与所述融霜分路相连，所述双向导流机构10的出液侧分路分别与所述制热分路相连；The defrosting branch unit includes a defrosting path connected in parallel with the fluorine-water heat exchanger 6, and a bidirectional flow guide mechanism 10 is provided on the defrosting path, and the liquid return side of the bidirectional flow guiding mechanism 10 is divided into The paths are respectively connected with the defrosting branches, and the outlet side branches of the bidirectional flow guide mechanism 10 are respectively connected with the heating branches;
所述空气源热泵机组在融霜时，每次至少对其中一组氟-空气换热机构进行融霜，依次流经融霜通路、其中至少一条融霜分路中的制冷工质与经氟-水换热器6换热后的制冷工质在双向导流机构10的回液侧混流，并经双向导流机构10的出液侧分路分别流向剩余氟-空气换热机构中的制热分路。When defrosting, the air source heat pump unit defrosts at least one of the fluorine-air heat exchange mechanisms each time, and flows through the defrosting passage, the refrigerant in at least one of the defrosting branches and the refrigerant through the fluorine -The refrigerating medium after the heat exchange of the water heat exchanger 6 is mixed at the liquid return side of the bidirectional flow guide mechanism 10, and flows to the system in the remaining fluorine-air heat exchange mechanism respectively through the liquid outlet side branch of the bidirectional flow guide mechanism 10 Hot shunt.
优选地，所述室外空气换热单元还包括设置在所述氟-空气换热器上的风机，采用多分路空气换热器及其风机设计思路，降低了单风机的风量与噪声，机组整体噪音可较大幅度地降低。优选地，所述空气源热泵机组在融霜时，每次对其中一组氟-空气换热机构进行融霜，逐一轮动地对每一组氟-空气换热机构进行融霜操作，每次仅对一组氟-空气换热机构进行融霜，使得机组系统运行最为稳定，制冷工质的流量变化降至最低，能够有效地提高系统运行可靠性。Preferably, the outdoor air heat exchange unit also includes a fan arranged on the fluorine-air heat exchanger, and adopts the multi-branch air heat exchanger and its fan design concept, which reduces the air volume and noise of a single fan, and the unit as a whole Noise can be greatly reduced. Preferably, when defrosting, the air source heat pump unit defrosts one group of fluorine-air heat exchange mechanisms each time, and defrosts each group of fluorine-air heat exchange mechanisms one by one in rotation, each time Only one set of fluorine-air heat exchange mechanism is defrosted for the first time, so that the unit system operates most stably, the flow change of the refrigerant refrigerant is minimized, and the system operation reliability can be effectively improved.
在不需要融霜的制热工况下，从压缩机出来的高温高压制冷工质气体经由油分离器和四通换向阀，进入氟-水换热器(冷凝器)中进行放热，冷凝成液体，经过单向阀和双向导流机构，分别进入制热分路，通过电子膨胀阀节流降压，进入氟-空气换热器(蒸发器)进行吸热，制冷工质汽化吸热后，经四通换向阀被压缩机吸入，完成循环。Under heating conditions that do not require defrosting, the high-temperature and high-pressure refrigerant gas from the compressor enters the fluorine-water heat exchanger (condenser) to release heat through the oil separator and four-way reversing valve. Condensed into liquid, through the one-way valve and the two-way guide mechanism, enter the heating branch respectively, through the electronic expansion valve throttling and reducing pressure, enter the fluorine-air heat exchanger (evaporator) to absorb heat, and the refrigerant is vaporized and absorbed After heating, it is sucked into the compressor through the four-way reversing valve to complete the cycle.
需要融霜时，融霜分路上的融霜电磁阀打开，同时该回路系统的制热电子膨胀阀关闭，高温高压的制冷工质通过融霜电子膨胀阀进入氟-空气换热器(蒸发器)进行融霜，然后在双向导流机构中与未参与融霜的制冷工质进行混合后，进入其他回路继续完成循环，从而实现在融霜的同时可以进行制热。When defrosting is required, the defrosting solenoid valve on the defrosting branch circuit is opened, and at the same time, the heating electronic expansion valve of the circuit system is closed, and the high-temperature and high-pressure refrigerant enters the fluorine-air heat exchanger (evaporator) through the defrosting electronic expansion valve ) to defrost, and then mix with the refrigerant that does not participate in defrosting in the two-way flow guide mechanism, and then enter other circuits to continue to complete the cycle, so that heating can be performed while defrosting.
本发明的空气源热泵机组利用时空分割原理，提出空气源热泵全新的多分路式取热与轮动式融霜技术方案，将空气源热泵室外空气换热器设置为至少两个可独立运行的分路取热与融霜系统。对每一路独立的室外空气换热系统均单独分别设置一个制热分路和融霜分路，通过电磁阀和电子膨胀阀的开闭、单向阀等管路和管件实现融霜工况和制热工况的切换。其中一路氟-空气换热机构进行融霜的同时不影响其他分路氟-空气换热机构分路制热工况的运行，逐一轮动地对每个分路的氟-空气换热机构进行融霜操作，从而实现轮动精准融霜和连续供热。The air source heat pump unit of the present invention utilizes the principle of time-space division to propose a brand-new multi-branch type heat extraction and wheel-driven defrosting technical solution for the air source heat pump, and sets the outdoor air heat exchanger of the air source heat pump as at least two independently operable Split heating and defrosting system. For each independent outdoor air heat exchange system, a heating shunt and a defrosting shunt are separately set up, and the defrosting working conditions and defrosting conditions are realized through the opening and closing of solenoid valves and electronic expansion valves, check valves and other pipelines and fittings. Switching of heating mode. One of the fluorine-air heat exchange mechanisms defrosts without affecting the operation of the other branch fluorine-air heat exchange mechanisms in the heating condition, and the fluorine-air heat exchange mechanisms of each branch are rotated one by one. Defrost operation, so as to achieve precise defrosting and continuous heating.
实施例2Example 2
本发明还提供了一种连续供热的空气源热泵机组，如图2所示，所述空气源热泵机组包括压缩机单元、室内水换热单元、室外空气换热单元以及融霜分路单元。The present invention also provides an air source heat pump unit for continuous heating, as shown in Figure 2, the air source heat pump unit includes a compressor unit, an indoor water heat exchange unit, an outdoor air heat exchange unit, and a defrosting branch unit .
所述压缩机单元包括依次循环连接的气液分离器9、压缩机1、油分离器2、连接机构3；The compressor unit includes a gas-liquid separator 9, a compressor 1, an oil separator 2, and a connecting mechanism 3 which are sequentially connected in circulation;
所述室内水换热单元包括与所述连接机构3相连接的氟-水换热器6，所述氟-水换热器6上设有水出口15和水入口16；The indoor water heat exchange unit includes a fluorine-water heat exchanger 6 connected to the connection mechanism 3, and the fluorine-water heat exchanger 6 is provided with a water outlet 15 and a water inlet 16;
所述室外空气换热单元包括至少两组并联设置的氟-空气换热机构，所述氟-空气换热机构包括氟-空气换热器、并联设置在所述氟-空气换热器上的制热分路与融霜分路以及设置在所述氟-空气换热器上的风机，所述制热分路上设有分路制热电子膨胀阀和单向阀8，所述融霜分路上设有分路融霜电磁阀；The outdoor air heat exchange unit includes at least two sets of fluorine-air heat exchange mechanisms arranged in parallel, and the fluorine-air heat exchange mechanisms include fluorine-air heat exchangers, The heating branch, the defrosting branch and the fan arranged on the fluorine-air heat exchanger, the heating branch is provided with a branch heating electronic expansion valve and a check valve 8, and the defrosting branch There is a shunt defrosting solenoid valve on the road;
所述融霜分路单元包括设置在所述油分离器2与连接机构3之间的融霜通路，所述融霜通路上依次设有手动截止阀5、融霜电磁阀4、双向导流机构10，所述融霜电磁阀4与双向导流机构10的回液侧之间分路分别与所述融霜分路相连，所述双向导流机构10的出液侧与连接机构3之间分路分别与所述制热分路相连；The defrosting branch unit includes a defrosting passage arranged between the oil separator 2 and the connecting mechanism 3, and the defrosting passage is provided with a manual cut-off valve 5, a defrosting solenoid valve 4, a bidirectional flow guide Mechanism 10, the branch between the defrosting electromagnetic valve 4 and the liquid return side of the two-way flow guide mechanism 10 is connected to the defrosting branch respectively, and the liquid outlet side of the two-way flow guide mechanism 10 is connected to the connection mechanism 3 The intermediate shunts are respectively connected with the heating shunts;
所述空气源热泵机组在融霜时，每次至少对其中一组氟-空气换热机构进行融霜，依次流经融霜通路、其中至少一条融霜分路中的制冷工质与经氟-水换热器6换热后的制冷工质在双向导流机构10的回液侧混流，并经双向导流机构10的出液侧分路分别流向剩余氟-空气换热机构中的制热分路。When defrosting, the air source heat pump unit defrosts at least one of the fluorine-air heat exchange mechanisms each time, and flows through the defrosting passage, the refrigerant in at least one of the defrosting branches and the refrigerant through the fluorine -The refrigerating medium after the heat exchange of the water heat exchanger 6 is mixed at the liquid return side of the bidirectional flow guide mechanism 10, and flows to the system in the remaining fluorine-air heat exchange mechanism respectively through the liquid outlet side branch of the bidirectional flow guide mechanism 10 Hot shunt.
本发明的空气源热泵机组利用时空分割原理，提出空气源热泵全新的多分路式取热与轮动式融霜技术方案，将空气源热泵室外空气换热器设置为至少两个可独立运行的分路取热与融霜系统。对每一路独立的室外空气换热系统均单独分别设置一个制热分路和融霜分路，通过电磁阀和电子膨胀阀的开闭、单向阀等管路和管件实现融霜工况和制热工况的切换。其中一路氟-空气换热机构进行融霜的同时不影响其他分路氟-空气换热机构分路制热工况的运行，逐一轮动地对每个分路的氟-空气换热机构进行融霜操作，从而实现轮动精准融霜和连续供热。The air source heat pump unit of the present invention utilizes the principle of time-space division to propose a brand-new multi-branch type heat extraction and wheel-driven defrosting technical solution for the air source heat pump, and sets the outdoor air heat exchanger of the air source heat pump as at least two independently operable Split heating and defrosting system. For each independent outdoor air heat exchange system, a heating shunt and a defrosting shunt are separately set up, and the defrosting working conditions and defrosting conditions are realized through the opening and closing of solenoid valves and electronic expansion valves, check valves and other pipelines and fittings. Switching of heating mode. One of the fluorine-air heat exchange mechanisms defrosts without affecting the operation of the other branch fluorine-air heat exchange mechanisms in the heating condition, and the fluorine-air heat exchange mechanisms of each branch are rotated one by one. Defrost operation, so as to achieve precise defrosting and continuous heating.
本发明系统分为四个部分，分别为压缩机单元、室内水换热单元、室外空气换热单元以及融霜分路单元。The system of the present invention is divided into four parts, namely a compressor unit, an indoor water heat exchange unit, an outdoor air heat exchange unit and a defrosting branch unit.
具体地，所述压缩机单元包括依次连接的气液分离器9、压缩机1、油分离器2、连接机构3。优选地，所述压缩机1为变频压缩机，以获得更好的节能效果。当本发明的空气源热泵机组仅用于制热时，所述连接机构3可采用管道直接连接，管路上无需配置阀门，所述油分离器2与氟-水换热器6直接铜管连通，所述气液分离器9与氟-空气换热机构直接铜管连通，此时空气源热泵机组仅能用于制热，无需设置四通阀。Specifically, the compressor unit includes a gas-liquid separator 9 , a compressor 1 , an oil separator 2 , and a connecting mechanism 3 connected in sequence. Preferably, the compressor 1 is an inverter compressor to obtain better energy-saving effect. When the air source heat pump unit of the present invention is only used for heating, the connecting mechanism 3 can be directly connected by pipelines, and no valves need to be arranged on the pipelines, and the oil separator 2 is directly connected with the fluorine-water heat exchanger 6 by copper pipes , the gas-liquid separator 9 is directly connected with the copper tube of the fluorine-air heat exchange mechanism. At this time, the air source heat pump unit can only be used for heating, and there is no need to install a four-way valve.
所述室内水换热单元包括与所述连接机构3相连接的氟-水换热器6，所述氟-水换热器6上设有水出口15和水入口16。其在制热时作为冷凝侧，在制冷时能够作为蒸发侧，通过所述氟-水换热器6上设置的水出口15和水入口16，能够直接接入到用户侧，从而为用户提供热水或冷水。The indoor water heat exchange unit includes a fluorine-water heat exchanger 6 connected to the connecting mechanism 3 , and the fluorine-water heat exchanger 6 is provided with a water outlet 15 and a water inlet 16 . It serves as the condensing side during heating, and can be used as the evaporating side during cooling. Through the water outlet 15 and water inlet 16 provided on the fluorine-water heat exchanger 6, it can be directly connected to the user side, thereby providing users with Hot or cold water.
所述室外空气换热单元包括至少两组并联设置的氟-空气换热机构，所述氟-空气换热机构包括氟-空气换热器、并联设置在所述氟-空气换热器上的制热分路与融霜分路以及设置在所述氟-空气换热器上的风机，所述制热分路上设有分路制热电子膨胀阀和单向阀8，所述融霜分路上设有分路融霜电磁阀。The outdoor air heat exchange unit includes at least two sets of fluorine-air heat exchange mechanisms arranged in parallel, and the fluorine-air heat exchange mechanisms include fluorine-air heat exchangers, The heating branch, the defrosting branch and the fan arranged on the fluorine-air heat exchanger, the heating branch is provided with a branch heating electronic expansion valve and a check valve 8, and the defrosting branch There is a shunt defrosting solenoid valve on the road.
如图2所示，本实施例中的空气源热泵机组并联设置了四组氟-空气换热机构，包括第一分路制热电子膨胀阀11-1、第一分路氟-空气换热器13-1和第一分路风机14-1；第二分路制热电子膨胀阀11-2、第二分路氟-空气换热器13-2和第二分路风机14-2；第三分路制热电子膨胀阀11-3、第三分路氟-空气换热器13-3和第三分路风机14-3；第四分路制热电子膨胀阀11-4、第四分路氟-空气换热器13-4和第四分路风机14-4及其各管路上设置的单向阀8。由于空气源热泵机组并联设置多组氟-空气换热机构，每组氟-空气换热器均单独采用一个风机，使得风机独立控制，效率更高，噪声更低。优选地，在所述氟-空气换热器中，空气在风机的驱动下，依次通过制热分路、融霜分路，从而使得融霜分路设置在制热分路空气下游侧，以获得更好的融霜效果。As shown in Figure 2, the air source heat pump unit in this embodiment is equipped with four sets of fluorine-air heat exchange mechanisms in parallel, including the first branch heating electronic expansion valve 11-1, the first branch fluorine-air heat exchange mechanism device 13-1 and the first branch fan 14-1; the second branch heating electronic expansion valve 11-2, the second branch fluorine-air heat exchanger 13-2 and the second branch fan 14-2; The third branch heating electronic expansion valve 11-3, the third branch fluorine-air heat exchanger 13-3 and the third branch fan 14-3; the fourth branch heating electronic expansion valve 11-4, the third branch heating The four-way fluorine-air heat exchanger 13-4, the fourth branch fan 14-4 and the one-way valve 8 provided on each pipeline. Since the air source heat pump unit is equipped with multiple sets of fluorine-air heat exchange mechanisms in parallel, each set of fluorine-air heat exchangers uses a separate fan, so that the fan is independently controlled, with higher efficiency and lower noise. Preferably, in the fluorine-air heat exchanger, the air, driven by the fan, passes through the heating shunt and the defrosting shunt in turn, so that the defrosting shunt is set on the downstream side of the heating shunt air, so as to Get a better defrosting effect.
所述融霜分路单元包括设置在所述油分离器2与连接机构3之间的融霜通路，所述融霜电磁阀4与双向导流机构10的回液侧之间分路分别与所述融霜分路相连，所述双向导流机构10的出液侧与连接机构3之间分路分别与所述制热分路相连。通过融霜通路，油分离器2出来的制冷工质能够直接输送到某一融霜分路的氟-空气换热器，使其进行融霜。所述融霜通路上依次设有手动截止阀5、融霜电磁阀4、双向导流机构10，手动截止阀5的设置便于检修，融霜后的制冷工质在双向导流机构10中与经氟-水换热器6换热后的制冷工质在双向导流机构10的回液侧混流。所述双向导流机构10利用高速导流原理，如射流的方式，将两种不同压力状态的制冷工质进行混合汇流。The defrosting branch unit includes a defrosting passage arranged between the oil separator 2 and the connection mechanism 3, and the defrosting solenoid valve 4 and the liquid return side of the bidirectional flow guide mechanism 10 are respectively connected to the defrosting passage. The defrosting branch is connected, and the branch between the liquid outlet side of the bidirectional flow guide mechanism 10 and the connecting mechanism 3 is respectively connected with the heating branch. Through the defrosting passage, the refrigerant from the oil separator 2 can be directly transported to the fluorine-air heat exchanger of a certain defrosting branch, so that it can be defrosted. The defrosting passage is provided with a manual cut-off valve 5, a defrosting solenoid valve 4, and a bidirectional flow guide mechanism 10 in sequence. The setting of the manual cut-off valve 5 is convenient for maintenance. The refrigerant refrigerant after heat exchange in the fluorine-water heat exchanger 6 flows in a mixed flow at the liquid return side of the bidirectional flow guide mechanism 10 . The two-way guide mechanism 10 utilizes the principle of high-speed guide, such as jet flow, to mix and concatenate two kinds of refrigerants in different pressure states.
如图2所示，在实施例中，所述融霜分路单元分为四个分路，包括第一分路融霜电磁阀12-1、第二分路融霜电磁阀12-2、第三分路融霜电磁阀12-3、第四分路融霜电磁阀12-4及其各管路上设置的单向阀8。其中，所述空气源热泵机组在融霜时，每次至少对其中一组氟-空气换热机构进行融霜，依次流经融霜通路、其中至少一条融霜分路中的制冷工质与经氟-水换热器6换热后的制冷工质在双向导流机构10的回液侧混流，并经双向导流机构10的出液侧分路分别流向剩余氟-空气换热机构中的制热分路。As shown in Fig. 2, in the embodiment, the defrosting branch unit is divided into four branches, including the first branch defrosting solenoid valve 12-1, the second branch defrosting solenoid valve 12-2, The third bypass defrosting solenoid valve 12-3, the fourth bypass defrosting solenoid valve 12-4 and the one-way valve 8 provided on each pipeline. Wherein, when the air source heat pump unit defrosts, at least one of the fluorine-air heat exchange mechanisms is defrosted each time, and the refrigerant in the defrosting passage, at least one of the defrosting branches and the The refrigerant after heat exchange by the fluorine-water heat exchanger 6 is mixed on the liquid return side of the bidirectional flow guide mechanism 10, and flows into the remaining fluorine-air heat exchange mechanism respectively through the liquid outlet side branches of the bidirectional flow guide mechanism 10 heating branch.
相比于传统空气源热泵机组，本发明在融霜时依然可以保证供热，通过逐一轮动地对每个分路的氟-空气换热机构进行融霜操作，从而实现轮动精准融霜和连续供热，供热效果更好，大大地减少压缩机启停次数，运行更可靠。同时，由于供热时间增加，从而也提高了机组在一定时间内的总供热量。而且由于融霜时间短，可实现精准融霜；进一步，由于换热面积增大，能效比也能够提高，使得机组能够达到高的能效等级。Compared with the traditional air source heat pump unit, the present invention can still guarantee the heat supply during defrosting, and performs defrosting operation on the fluorine-air heat exchange mechanism of each branch one by one, so as to realize precise defrosting in rotation And continuous heating, the heating effect is better, the number of start and stop of the compressor is greatly reduced, and the operation is more reliable. At the same time, due to the increase of heating time, the total heat supply of the unit within a certain period of time is also increased. Moreover, due to the short defrosting time, precise defrosting can be realized; furthermore, due to the increased heat exchange area, the energy efficiency ratio can also be improved, enabling the unit to achieve a high energy efficiency level.
优选地，与所述融霜分路相连的双向导流机构10的回液管路上设有单向阀8与手动截止阀5，能够有效地防止制冷工质的回流。为了能够更好地将融霜后的制冷工质在双向导流机构10中与经氟-水换热器6换热后的制冷工质在双向导流机构10的回液侧混流，优选地，所述双向导流机构10的出液侧上设有单向阀8，且所述双向导流机构10的出液侧与回液侧之间并联设有制冷通路，所述制冷通路上设有单向阀8，保证制冷工质单向流动。优选地，所述空气源热泵机组在融霜时，逐一轮动地对每一组氟-空气换热机构进行融霜操作，从而实现机组的连续供热。Preferably, a one-way valve 8 and a manual shut-off valve 5 are provided on the liquid return line of the bidirectional flow guide mechanism 10 connected to the defrosting branch, which can effectively prevent the refrigerant from flowing back. In order to better mix the refrigerant refrigerant after defrosting in the bidirectional flow guide mechanism 10 with the refrigerant refrigerant after heat exchange in the fluorine-water heat exchanger 6 on the liquid return side of the bidirectional flow guide mechanism 10, preferably , the liquid outlet side of the bidirectional flow guide mechanism 10 is provided with a one-way valve 8, and a refrigeration passage is provided in parallel between the liquid outlet side and the liquid return side of the bidirectional flow guide mechanism 10, and the refrigeration passage is provided with There is a one-way valve 8 to ensure the one-way flow of the refrigerant. Preferably, when defrosting, the air source heat pump unit rotates each group of fluorine-air heat exchange mechanisms one by one to perform defrosting operation, so as to realize continuous heat supply of the unit.
优选地，所述连接机构3为四通换向阀，通过四通换向阀切换管路连接，使得本发明的空气源热泵机组同时具备制热与制冷功能。此时，所述室内水换热单元还包括与所述氟-水换热器6相连接的单向阀8，所述单向阀8进出口两侧并联设置有制冷通路，所述制冷通路上设有制冷电子膨胀阀7以及与氟-水换热器6相连接的单向阀8反向设置的单向阀8。Preferably, the connection mechanism 3 is a four-way reversing valve, through which the pipeline is switched so that the air source heat pump unit of the present invention has both heating and cooling functions. At this time, the indoor water heat exchange unit also includes a one-way valve 8 connected to the fluorine-water heat exchanger 6, and cooling passages are arranged in parallel on both sides of the inlet and outlet of the one-way valve 8, and the cooling passages A cooling electronic expansion valve 7 and a one-way valve 8 connected to the fluorine-water heat exchanger 6 are arranged oppositely.
优选地，每一制热分路上分路制热电子膨胀阀和单向阀8的两侧均并联设置有制冷分路，所述制冷分路上设有与所述分路制热电子膨胀阀相连的单向阀8反向设置的单向阀8。优选地，所述分路融霜电磁阀设置在所述融霜分路上的氟-空气换热器的制冷工质入口侧，所述融霜分路上的氟-空气换热器的制冷工质出口侧设有单向阀8。Preferably, a cooling branch is arranged in parallel on both sides of the branch heating electronic expansion valve and the one-way valve 8 on each heating branch, and the cooling branch is provided with a heating branch connected to the branch heating electronic expansion valve. The one-way valve 8 of the reversely set one-way valve 8. Preferably, the bypass defrosting electromagnetic valve is arranged on the refrigerant inlet side of the fluorine-air heat exchanger on the defrosting branch, and the refrigerant of the fluorine-air heat exchanger on the defrosting branch A one-way valve 8 is provided on the outlet side.
在不需要融霜的制热工况下，从压缩机出来的高温高压制冷工质气体经由油分离器和四通换向阀，进入氟-水换热器(冷凝器)中进行放热，冷凝成液体，经过单向阀和双向导流机构，分别进入制热分路，通过电子膨胀阀节流降压，进入氟-空气换热器(蒸发器)进行吸热，制冷工质汽化吸热后，经四通换向阀被压缩机吸入，完成循环。Under heating conditions that do not require defrosting, the high-temperature and high-pressure refrigerant gas from the compressor enters the fluorine-water heat exchanger (condenser) to release heat through the oil separator and four-way reversing valve. Condensed into liquid, through the one-way valve and the two-way guide mechanism, enter the heating branch respectively, through the electronic expansion valve throttling and reducing pressure, enter the fluorine-air heat exchanger (evaporator) to absorb heat, and the refrigerant is vaporized and absorbed After heating, it is sucked into the compressor through the four-way reversing valve to complete the cycle.
需要融霜时，融霜分路上的融霜电磁阀打开，同时该回路系统的制热电子膨胀阀关闭，高温高压的制冷工质通过融霜电子膨胀阀进入氟-空气换热器(蒸发器)进行融霜，然后在双向导流机构中与未参与融霜的制冷工质进行混合后，进入其他回路继续完成循环，从而实现在融霜的同时可以进行制热。When defrosting is required, the defrosting solenoid valve on the defrosting branch circuit is opened, and at the same time, the heating electronic expansion valve of the circuit system is closed, and the high-temperature and high-pressure refrigerant enters the fluorine-air heat exchanger (evaporator) through the defrosting electronic expansion valve ) to defrost, and then mix with the refrigerant that does not participate in defrosting in the two-way flow guide mechanism, and then enter other circuits to continue to complete the cycle, so that heating can be performed while defrosting.
优选地，所述室外空气换热单元包括4～12组并联设置的氟-空气换热机构，以获得较好的融霜效果。Preferably, the outdoor air heat exchange unit includes 4 to 12 sets of fluorine-air heat exchange mechanisms arranged in parallel to obtain a better defrosting effect.
本发明的连续供热的空气源热泵机组至少具有如下优点：The air source heat pump unit for continuous heating of the present invention has at least the following advantages:
1、本发明的空气源热泵机组中某分路融霜时不影响其他分路制热，热泵机组可实现系统的连续供热，避免现有空气源热泵机组融霜时通过四通换向阀使机组制冷与制热频繁切换，提升了热泵机组有效供热时间与冬季总供热量，改善了空气源热泵冬季供热效果；1. In the air source heat pump unit of the present invention, the defrosting of a certain branch does not affect the heating of other branches, and the heat pump unit can realize the continuous heating of the system, avoiding the defrosting of the existing air source heat pump unit through the four-way reversing valve Make the cooling and heating of the unit switch frequently, increase the effective heating time of the heat pump unit and the total heat supply in winter, and improve the heating effect of the air source heat pump in winter;
2、本发明的空气源热泵机组中的四通换向阀仅用于夏季制冷和冬季制热转换时切换，融霜操作时不需要切换，大大减少四通换向阀(包括压缩机)的开关(启停)次数，提升了空气源热泵机组的可靠性；2. The four-way reversing valve in the air source heat pump unit of the present invention is only used for switching between cooling in summer and heating in winter, and does not need to be switched during defrosting operation, which greatly reduces the cost of the four-way reversing valve (including the compressor). The number of switches (start and stop) improves the reliability of the air source heat pump unit;
3、本发明的空气源热泵机组中室外空气换热部分增设的融霜换热回路使系统的换热面积增大，热泵机组制冷与制热的能效比提高；3. The defrosting heat exchange circuit added to the outdoor air heat exchange part of the air source heat pump unit of the present invention increases the heat exchange area of the system, and improves the energy efficiency ratio of refrigeration and heating of the heat pump unit;
4、现有空气源热泵室外换热器的风机均为共用，采用启停一致方式，单风机的风量与噪音均较大，而本发明采用多分路空气换热器及其风机设计思路，降低了单风机的风量与噪声，机组整体噪音可较大幅度地降低。4. The fans of the outdoor heat exchanger of the existing air source heat pump are all shared, and the start and stop mode is adopted in a consistent manner. The air volume and noise of a single fan are reduced, and the overall noise of the unit can be greatly reduced.
如图2所示，以四组并联设置的氟-空气换热机构为例，本发明连续供热的空气源热泵机组取得上述技术效果的原理阐述如下：As shown in Figure 2, taking four sets of fluorine-air heat exchange mechanisms arranged in parallel as an example, the principle of the air source heat pump unit for continuous heating of the present invention to achieve the above technical effects is as follows:
在冬季制热工况下，室外空气换热单元的各个氟-空气换热机构分路的制热电子膨胀阀和风机打开。例如：第一分路制热电子膨胀阀11-1和第一分路风机14-1、第二分路制热电子膨胀阀11-2和第二分路风机14-2、第三分路制热电子膨胀阀11-3和第三分路风机14-3、第四分路制热电子膨胀阀11-4和第四分路风机14-4打开；融霜分路部分的融霜电磁阀4和各个分路的融霜电磁阀关闭，例如：第一分路融霜电磁阀12-1、第二分路融霜电磁阀12-2、第三分路融霜电磁阀12-3、第四分路融霜电磁阀12-4关闭；制冷电子膨胀阀7关闭。从压缩机1出来的高温高压制冷工质气体经由油分离器2和四通换向阀3，进入氟-水换热器6中进行放热，冷凝成液体，经过单向阀8和双向导流机构10，分别进入四个制热分路。在第一分路中，通过单向阀8和第一回路制热电子膨胀阀11-1节流降压，进入氟-空气换热器13-1进行吸热；第二、三、四分路的制热工况过程以此类推。四个制热分路的制冷工质汽化吸热后，汇合经四通换向阀3和气液分离器9，被压缩机1吸入完成制热循环。In winter heating conditions, the heating electronic expansion valves and fans of each fluorine-air heat exchange mechanism branch of the outdoor air heat exchange unit are turned on. For example: the first branch heating electronic expansion valve 11-1 and the first branch fan 14-1, the second branch heating electronic expansion valve 11-2 and the second branch fan 14-2, the third branch The heating electronic expansion valve 11-3 and the third branch fan 14-3, the fourth heating electronic expansion valve 11-4 and the fourth branch fan 14-4 are opened; Valve 4 and the defrosting solenoid valves of each branch are closed, for example: the first branch defrosting solenoid valve 12-1, the second branch defrosting solenoid valve 12-2, the third branch defrosting solenoid valve 12-3 , The fourth bypass defrosting solenoid valve 12-4 is closed; the refrigeration electronic expansion valve 7 is closed. The high-temperature and high-pressure refrigerant gas coming out of the compressor 1 passes through the oil separator 2 and the four-way reversing valve 3, enters the fluorine-water heat exchanger 6 to release heat, condenses into liquid, and passes through the one-way valve 8 and the two-way guide The flow mechanism 10 enters four heating shunts respectively. In the first branch, through the one-way valve 8 and the first circuit heating electronic expansion valve 11-1 throttling and reducing pressure, it enters the fluorine-air heat exchanger 13-1 to absorb heat; the second, third and fourth branches The heating process of the road can be deduced by analogy. After the refrigerants in the four heating branches vaporize and absorb heat, they converge through the four-way reversing valve 3 and the gas-liquid separator 9, and are sucked into the compressor 1 to complete the heating cycle.
在冬季融霜工况时，融霜通路上的融霜电磁阀4、手动截止阀5开启，依次对四个融霜分路进行融霜。其中一个融霜分路进行融霜时，该融霜分路所在的制热分路上的分路制热电子膨胀阀关闭，其他制热分路仍按照制热工况运行。例如，当第一分路开始融霜时，第一分路融霜电磁阀12-1打开，同时第一分路制热电子膨胀阀11-1关闭，第一回路风机14-1停止工作，实现制热工况与融霜工况的切换。高温制冷工质通过融霜电磁阀12-1，进入第一分路氟-空气换热器13-1，放出热量将霜层融化，然后经过单向阀8和手动截止阀5，进入双向导流机构10中与另外未参与融霜的制冷工质进行汇流混合后，进入剩余三个制热分路继续完成制热工况循环。然后依次对第二、三、四分路进行轮动融霜，融霜过程同上。In the winter defrosting condition, the defrosting electromagnetic valve 4 and the manual stop valve 5 on the defrosting passage are opened, and the four defrosting branches are defrosted in turn. When one of the defrosting sub-circuits defrosts, the sub-circuit heating electronic expansion valve on the heating sub-circuit where the defrosting sub-circuit is located is closed, and the other heating sub-circuits still operate according to the heating condition. For example, when the first branch begins to defrost, the first branch defrost electromagnetic valve 12-1 is opened, and at the same time the first branch heating electronic expansion valve 11-1 is closed, and the first circuit fan 14-1 stops working. Realize the switching between heating working condition and defrosting working condition. The high-temperature refrigerant passes through the defrosting solenoid valve 12-1, enters the first branch fluorine-air heat exchanger 13-1, releases heat to melt the frost layer, and then passes through the one-way valve 8 and the manual stop valve 5 to enter the two-way guide After converging and mixing with other refrigerants not involved in defrosting in the flow mechanism 10, it enters the remaining three heating branches to continue to complete the heating cycle. Then carry out rotating defrosting on the second, third and fourth branches in turn, and the defrosting process is the same as above.
在夏季制冷工况下，制冷电子膨胀阀7开启，融霜回路部分的融霜电磁阀4和各个回路的制热电子膨胀阀和融霜电磁阀关闭，例如：第一分路制热电子膨胀阀11-1和第一分路融霜电磁阀12-1、第二分路制热电子膨胀阀11-2和第二分路融霜电磁阀12-2、第三分路制热电子膨胀阀11-3和第三分路融霜电磁阀12-3、第四分路制热电子膨胀阀11-4和第四分路融霜电磁阀12-4关闭。从压缩机1出来的制冷工质经由油分离器2和四通换向阀3，分别进入四组氟-空气换热机构。在第一分路中，进入氟-空气换热器13-1进行放热后流经旁路上的单向阀8；在第二、三、四分路中的氟-空气换热机构的换热过程同理。四组氟-空气换热机构的制冷工质汇合，经制冷通路上的单向阀8和制冷电子膨胀阀7，进入氟-水换热器6中进行吸热，经四通换向阀3和气液分离器9，被压缩机1吸入完成制冷循环。In summer cooling conditions, the refrigeration electronic expansion valve 7 is opened, the defrosting solenoid valve 4 of the defrosting circuit part and the heating electronic expansion valve and defrosting solenoid valve of each circuit are closed, for example: the first branch heating electronic expansion Valve 11-1 and the first bypass defrosting solenoid valve 12-1, the second bypass heating electronic expansion valve 11-2 and the second bypass defrosting solenoid valve 12-2, the third bypass heating electronic expansion valve The valve 11-3 and the third bypass defrosting solenoid valve 12-3, the fourth bypass heating electronic expansion valve 11-4 and the fourth bypass defrosting solenoid valve 12-4 are closed. The refrigerant coming out of the compressor 1 passes through the oil separator 2 and the four-way reversing valve 3 and enters four sets of fluorine-air heat exchange mechanisms respectively. In the first branch, it enters the fluorine-air heat exchanger 13-1 to discharge heat and then flows through the check valve 8 on the bypass; The same goes for thermal processes. The refrigerants of the four groups of fluorine-air heat exchange mechanisms converge, pass through the one-way valve 8 and the refrigeration electronic expansion valve 7 on the refrigeration circuit, enter the fluorine-water heat exchanger 6 for heat absorption, and pass through the four-way reversing valve 3 And gas-liquid separator 9, sucked by compressor 1 to complete the refrigeration cycle.
最后应当说明的是:以上实施例仅用以说明本发明的技术方案而非对其限制；尽管参照较佳实施例对本发明进行了详细的说明，所属领域的普通技术人员应当理解：依然可以对本发明的具体实施方式进行修改或者对部分技术特征进行等同替换；而不脱离本发明技术方案的精神，其均应涵盖在本发明请求保护的技术方案范围当中。Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: the present invention can still be Modifications to the specific implementation of the invention or equivalent replacement of some technical features; without departing from the spirit of the technical solution of the present invention, should be included in the scope of the technical solution claimed in the present invention.
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