CN108088109B - Heat pump system with middle air supplementing function - Google Patents
Heat pump system with middle air supplementing function Download PDFInfo
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- CN108088109B CN108088109B CN201810073165.XA CN201810073165A CN108088109B CN 108088109 B CN108088109 B CN 108088109B CN 201810073165 A CN201810073165 A CN 201810073165A CN 108088109 B CN108088109 B CN 108088109B
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- valve
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- heat exchanger
- way reversing
- intercooler
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- 230000001502 supplementing effect Effects 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims description 29
- 238000001816 cooling Methods 0.000 claims description 22
- 239000013589 supplement Substances 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 description 17
- 238000007906 compression Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/37—Capillary tubes
Abstract
The invention discloses a heat pump system with middle air supplementing, and aims to provide a heat pump which is used for improving the efficiency of the heat pump system when the temperature of a heat source in winter is low, reducing the usage amount of a unit and reducing the initial investment of the system. The exhaust end of the compressor is connected with a first interface of the four-way reversing valve, the air suction end of the compressor is connected with a third interface of the four-way reversing valve, a second interface of the four-way reversing valve is respectively connected with a first throttle valve outlet and a first valve inlet through an outdoor heat exchanger, and a liquid outlet of the intercooler is connected with the first throttle valve inlet through a second valve; the exhaust port of the intercooler is connected with the air supplementing port of the compressor, the second port of the indoor heat exchanger is connected with the inlet of the second throttling valve and the outlet of the third throttling valve respectively, the outlet of the second throttling valve is connected with the inlet of the intercooler, the inlet of the third throttling valve is connected with the outlet of the first valve, and the first port of the indoor heat exchanger is connected with the fourth port of the four-way reversing valve.
Description
Technical Field
The invention relates to a heat pump unit, in particular to a heat pump system which adopts single-stage compression cooling in summer and can realize heating with middle air supplement in winter, and the heat pump system is used for improving the heating efficiency of the heat pump system when the temperature of a heat source in winter is lower.
Background
With the continuous improvement of environmental protection requirements, air source heat pumps are being widely used due to the technical characteristics of energy conservation and environmental protection. When the single-stage compression cycle is used for heating in winter, the system efficiency is lower due to the high compression ratio, and the application is limited to a certain extent. In order to improve the efficiency of the air source heat pump system and realize heating at the outdoor temperature of minus 25 ℃, a two-stage compression cycle is adopted.
However, when the two-stage compression is adopted to realize winter heat supply, if the system design is carried out according to the requirement of being capable of meeting the outdoor temperature heating load of minus 25 ℃, the cooling capacity of the system configuration is far greater than the cooling load of a building in summer, and more than half of units are idle in the system in summer operation, so that waste is formed.
Disclosure of Invention
The invention aims at overcoming the technical defects in the prior art, and realizes refrigeration in summer and heating in winter by providing the heat pump system with the middle air supplementing function, so that the efficiency of the heat pump system is improved when the temperature of a heat source in winter is lower, the using amount of a unit is reduced, and the initial investment of the system is reduced.
The technical scheme adopted for realizing the purpose of the invention is as follows:
the heat pump system with the middle air supplementing function comprises a compressor, a four-way reversing valve, an outdoor heat exchanger, an indoor heat exchanger, a first throttle valve, a second throttle valve, a third throttle valve, a first valve, a second valve and an intercooler, wherein the exhaust end of the compressor is connected with a first interface of the four-way reversing valve, the air suction end of the compressor is connected with a third interface of the four-way reversing valve, a second interface of the four-way reversing valve is connected with an outlet of the first throttle valve and an inlet of the first valve respectively through the outdoor heat exchanger, and the liquid outlet of the intercooler is connected with an inlet of the first throttle valve through the second valve; the exhaust port of the intercooler is connected with the air supplementing port of the compressor, the second interface of the indoor heat exchanger is respectively connected with the second throttle valve inlet and the third throttle valve outlet, the second throttle valve outlet is connected with the intercooler inlet, the third throttle valve inlet is connected with the outlet of the first valve, and the first interface of the indoor heat exchanger is connected with the fourth interface of the four-way reversing valve;
when the cooling operation is performed in summer, working medium is compressed and boosted by the compressor and then enters the outdoor heat exchanger through the four-way reversing valve to be condensed and radiated, and after the working medium is condensed and radiated, the working medium enters the third throttle valve through the first valve to be throttled and depressurized, and then enters the indoor heat exchanger to be evaporated and absorbed, so that a refrigeration phenomenon is generated, and the working medium returns to the compressor through the four-way reversing valve to complete the cooling circulation;
when the indoor heat exchanger is used for heating in winter, working media enter the indoor heat exchanger through the four-way reversing valve to be condensed and radiated after being compressed and boosted by the compressor, heating phenomena are generated, the working media are condensed and radiated in the indoor heat exchanger and enter the intercooler through the second throttling valve to be throttled and depressurized, throttled flash gas enters the compressor to supplement air through the intercooler, throttled liquid enters the first throttling valve to be throttled and depressurized through the intercooler and the second valve, and the throttled and depressurized working media are evaporated and absorbed in the outdoor heat exchanger and then return to the compressor through the four-way reversing valve, so that heating circulation is completed.
The other heat pump system with the middle air supplementing function comprises a compressor, a four-way reversing valve, an outdoor heat exchanger, an indoor heat exchanger, an intercooler, a first valve, a second valve, a fourth throttle valve and a fifth throttle valve, wherein the exhaust end of the compressor is connected with a first interface of the four-way reversing valve, the air suction end of the compressor is connected with a third interface of the four-way reversing valve, a second interface of the four-way reversing valve is respectively connected with an outlet of the fifth throttle valve and an inlet of the first valve through the outdoor heat exchanger, and the liquid outlet of the intercooler is connected with an inlet of the fifth throttle valve through the second valve; the exhaust port of the intercooler is connected with the air supplementing port of the compressor, the second port of the indoor heat exchanger is respectively connected with the inlet of the intercooler and the outlet of the first valve through the fourth throttle valve, and the first port of the indoor heat exchanger is connected with the fourth port of the four-way reversing valve;
when in cooling operation in summer, working medium is compressed and boosted by the compressor, then enters the outdoor heat exchanger through the four-way reversing valve to be condensed and radiated, enters the fourth throttle valve through the first valve to be throttled and depressurized after being condensed and radiated, enters the indoor heat exchanger to be evaporated and absorbed, generates refrigeration phenomenon, and then returns to the compressor through the four-way reversing valve to complete cooling circulation;
when the indoor heat exchanger is used for heating in winter, working media enter the indoor heat exchanger through the four-way reversing valve to be condensed and radiated after being compressed and boosted by the compressor, heating is generated, the working media are condensed and radiated in the indoor heat exchanger and enter the intercooler through the fourth throttling valve to be throttled and depressurized, throttled flash gas enters the compressor to supplement air through the intercooler, throttled liquid enters the fifth throttling valve to be throttled and depressurized through the intercooler and the second valve, and the throttled and depressurized working media are evaporated and absorbed in the outdoor heat exchanger and then return to the compressor through the four-way reversing valve, so that heating circulation is completed.
The first valve and the second valve are one-way valves or electromagnetic valves.
The outdoor heat exchanger and the indoor heat exchanger are air-cooled heat exchangers or water-cooled heat exchangers.
The compressor is a scroll compressor, a rotor compressor, a screw compressor or a piston compressor.
Compared with the prior art, the invention has the beneficial effects that:
1. when the outdoor temperature is low, the system efficiency is high: when the outdoor temperature of the heat pump system is low in winter, the two-stage compression cycle of middle air supplementing is adopted, the compression ratio of the compressor is small, and the system efficiency is high.
2. When cooling in summer, the cooling capacity of the single-stage compression cycle can meet the cooling load of a building, and when heating in winter, the heat supply of the double-stage compression of the middle air supplement can meet the heat load of the building, so that the using amount of a unit is reduced, the energy consumption of a system is reduced, and the initial investment cost of the system is saved.
3. The system is simple: the system has simple structure, and can select a high-efficiency circulation mode when cooling in summer and heating in winter.
Drawings
FIG. 1 is a schematic diagram of a heat pump system with intermediate air make-up using three throttles according to the present invention;
FIG. 2 is a schematic diagram of a heat pump system with intermediate air make-up using two throttles according to the present invention;
fig. 3 is a schematic diagram of an interface of the four-way reversing valve.
In the figure: 1. compressor, 2-1 four-way reversing valve, 2-2 four-way reversing valve first interface, 2-3 four-way reversing valve second interface, 2-4 four-way reversing valve third interface, 3 outdoor heat exchanger, 4-1 first valve, 4-2 second valve, 5-1 first throttle valve, 5-2 second throttle valve, 5-3 third throttle valve, 5-4 fourth throttle valve, 5-5 fifth throttle valve, 6 intercooler, 7 indoor heat exchanger.
Detailed Description
The invention will be described in detail below with reference to the drawings and the specific embodiments.
Example 1
The invention adopts a heat pump system with middle air supplementing of three throttle valves as shown in figure 1, and comprises a compressor 1, a four-way reversing valve 2, an outdoor heat exchanger 3, an indoor heat exchanger 7, a first throttle valve 5-1, a second throttle valve 5-2, a third throttle valve 5-3, a first valve 4-1, a second valve 4-2 and an intercooler 6, wherein an exhaust end of the compressor 1 is connected with a first interface 2-1 of the four-way reversing valve 2, an air suction end of the compressor 1 is connected with a third interface 2-3 of the four-way reversing valve 2, a second interface 2-2 of the four-way reversing valve 2 is respectively connected with an outlet of the first throttle valve 5-1 and an inlet of the first valve 4-1 through the outdoor heat exchanger 3, and a liquid outlet of the intercooler 6 is connected with an inlet of the first throttle valve 5-1 through the second valve 4-2; the exhaust port of the intercooler 6 is connected with the air supplementing port of the compressor 1, the second port of the indoor heat exchanger 7 is connected with the inlet of the second throttle valve 5-2 and the outlet of the third throttle valve 5-3 respectively, the outlet of the second throttle valve 5-2 is connected with the inlet of the intercooler 6, the inlet of the third throttle valve 5-3 is connected with the outlet of the first valve 4-1, and the first port of the indoor heat exchanger 7 is connected with the fourth port 2-4 of the four-way reversing valve.
The interface schematic diagram of the four-way reversing valve is shown in fig. 3, and for the refrigerating working condition, a first interface 2-1 of the four-way reversing valve is communicated with a second interface 2-2 of the four-way reversing valve, and a third interface 2-3 of the four-way reversing valve is communicated with a fourth interface 2-4 of the four-way reversing valve; for heating working conditions, a first port 2-1 of the four-way reversing valve is communicated with a fourth port 2-4 of the four-way reversing valve, and a second port 2-2 of the four-way reversing valve is communicated with a third port 2-3 of the four-way reversing valve.
The cooling operation in summer is single-stage compression, working medium enters the outdoor heat exchanger 3 through the four-way reversing valve 2 after being compressed and boosted, and is condensed and radiated, enters the third throttling valve 5-3 through the first valve 4-1 after being condensed and radiated, enters the indoor heat exchanger 7 after being throttled and depressurized, and is evaporated and absorbed, so that a refrigerating phenomenon is generated, and then returns to the compressor 1 through the four-way reversing valve 2, and the cooling circulation is completed.
During heating in winter, the two-stage compression with middle air supply is performed, working medium enters the indoor heat exchanger 7 through the four-way reversing valve 2 after being compressed and boosted by the compressor 1, a heating phenomenon is generated, the working medium enters the intercooler 6 through the second throttling valve 5-2 after being condensed and radiated in the indoor heat exchanger 7, the throttled flash gas enters the compressor 1 through the intercooler 6 for air supply, the throttled liquid enters the first throttling valve 5-1 through the intercooler 6 and the second valve 4-2 for throttling and reducing pressure, and the throttled working medium is evaporated and absorbed in the outdoor heat exchanger 3 and returns to the compressor through the four-way reversing valve 2 to complete heating circulation.
Example 2
The invention adopts a heat pump system with middle air supplementing of two throttle valves as shown in figure 2, and comprises a compressor 1, a four-way reversing valve 2, an outdoor heat exchanger 3, an indoor heat exchanger 7, an intercooler 6, a first valve 4-1, a second valve 4-2, a fourth throttle valve 5-4 and a fifth throttle valve 5-5, wherein the exhaust end of the compressor 1 is connected with the first interface 2-1 of the four-way reversing valve 2, the air suction end of the compressor 1 is connected with the third interface 2-3 of the four-way reversing valve 2, the second interface 2-2 of the four-way reversing valve 2 is respectively connected with the outlet of the fifth throttle valve 5-5 and the inlet of the first valve 4-1 through the outdoor heat exchanger 3, and the liquid outlet of the intercooler 6 is connected with the inlet of the fifth throttle valve 5-5 through the second valve 4-2; the exhaust port of the intercooler 6 is connected with the air supplementing port of the compressor 1, the second port of the indoor heat exchanger 7 is respectively connected with the inlet of the intercooler 6 and the outlet of the first valve 4-1 through the fourth throttle valve 5-4, and the first port of the indoor heat exchanger 7 is connected with the fourth port 2-4 of the four-way reversing valve 2.
The interface schematic diagram of the four-way reversing valve is shown in fig. 3, and for the refrigerating working condition, a first interface 2-1 of the four-way reversing valve is communicated with a second interface 2-2 of the four-way reversing valve, and a third interface 2-3 of the four-way reversing valve is communicated with a fourth interface 2-4 of the four-way reversing valve; for heating working conditions, a first port 2-1 of the four-way reversing valve is communicated with a fourth port 2-4 of the four-way reversing valve, and a second port 2-2 of the four-way reversing valve is communicated with a third port 2-3 of the four-way reversing valve.
The cooling operation in summer is single-stage compression, working medium enters the outdoor heat exchanger 3 through the four-way reversing valve 2 after being compressed and boosted, and is condensed and radiated, enters the fourth throttling valve 5-4 through the first valve 4-1 after being condensed and radiated, enters the indoor heat exchanger 7 for evaporation and heat absorption after being throttled and depressurized, so that a refrigerating phenomenon is generated, and then returns to the compressor 1 through the four-way reversing valve 2, and the cooling circulation is completed;
during heating in winter, the two-stage compression with middle air supply is performed, working medium enters the indoor heat exchanger 7 through the four-way reversing valve 2 after being compressed and boosted by the compressor 1, a heating phenomenon is generated, the working medium enters the intercooler 6 through the fourth throttling valve 5-4 after being condensed and radiated in the indoor heat exchanger 7, the throttled flash gas enters the compressor 1 through the intercooler 6 for air supply, the throttled liquid enters the fifth throttling valve 5-5 through the intercooler 6 and the second valve 4-2 for throttling and depressurization, and the throttled working medium is evaporated and absorbed in the outdoor heat exchanger 3 and returns to the compressor 1 through the four-way reversing valve 2 to complete heating circulation.
In the above two embodiments, the first valve 4-1 and the second valve 4-2 are check valves or solenoid valves.
The outdoor heat exchanger 3 and the indoor heat exchanger 7 are air-cooled heat exchangers or water-cooled heat exchangers.
The compressor 1 is a scroll compressor, a rotor compressor, a screw compressor or a piston compressor.
The intercooler 6 is a multipurpose fluorine intercooler.
The first throttle valve, the second throttle valve, the third throttle valve, the fourth throttle valve and the fifth throttle valve are electronic expansion valves, thermal expansion valves, capillary tubes or orifice plate throttle devices.
The four-way reversing valve can be replaced by a plurality of electromagnetic valves or by a plurality of three-way valves.
When the outdoor temperature of the heat pump system is low in winter, the two-stage compression cycle of middle air supplementing is adopted, the compression ratio of the compressor is small, and the system efficiency is high. When cooling in summer, the cooling capacity of the single-stage compression cycle can meet the cooling load of a building, and when heating in winter, the heat supply capacity of the two-stage compression of the middle air supplement can meet the heat load of the building.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (4)
1. The heat pump system with the middle air supplementing function is characterized by comprising a compressor, a four-way reversing valve, an outdoor heat exchanger, an indoor heat exchanger, a first throttle valve, a second throttle valve, a third throttle valve, a first valve, a second valve and an intercooler, wherein the exhaust end of the compressor is connected with a first interface of the four-way reversing valve, the air suction end of the compressor is connected with a third interface of the four-way reversing valve, the second interface of the four-way reversing valve is respectively connected with an outlet of the first throttle valve and an inlet of the first valve through the outdoor heat exchanger, and the liquid outlet of the intercooler is connected with an inlet of the first throttle valve through the second valve; the exhaust port of the intercooler is connected with the air supplementing port of the compressor, the second interface of the indoor heat exchanger is respectively connected with the second throttle valve inlet and the third throttle valve outlet, the second throttle valve outlet is connected with the intercooler inlet, the third throttle valve inlet is connected with the outlet of the first valve, and the first interface of the indoor heat exchanger is connected with the fourth interface of the four-way reversing valve; when the cooling operation is performed in summer, working medium is compressed and boosted by the compressor and then enters the outdoor heat exchanger through the four-way reversing valve to be condensed and radiated, and after the working medium is condensed and radiated, the working medium enters the third throttle valve through the first valve to be throttled and depressurized, and then enters the indoor heat exchanger to be evaporated and absorbed, so that a refrigeration phenomenon is generated, and the working medium returns to the compressor through the four-way reversing valve to complete the cooling circulation; when the indoor heat exchanger is used for heating in winter, working media are compressed and boosted by the compressor and then enter the indoor heat exchanger through the four-way reversing valve to be condensed and radiated, a heating phenomenon is generated, the working media are condensed and radiated in the indoor heat exchanger and then enter the intercooler through the second throttling valve to be throttled and depressurized, throttled flash gas enters the compressor to supplement air through the intercooler, throttled liquid enters the first throttling valve to be throttled and depressurized through the intercooler and the second valve, and the throttled and depressurized working media are evaporated and absorbed in the outdoor heat exchanger and then return to the compressor through the four-way reversing valve to complete heating circulation; the first valve and the second valve are one-way valves or electromagnetic valves; the compressor is a scroll compressor, a rotor compressor, a screw compressor or a piston compressor.
2. The heat pump system with intermediate make-up as recited in claim 1, wherein the outdoor heat exchanger and the indoor heat exchanger are air-cooled heat exchangers or water-cooled heat exchangers.
3. The heat pump system with the middle air supplementing function is characterized by comprising a compressor, a four-way reversing valve, an outdoor heat exchanger, an indoor heat exchanger, an intercooler, a first valve, a second valve, a fourth throttle valve and a fifth throttle valve, wherein the exhaust end of the compressor is connected with a first interface of the four-way reversing valve, the air suction end of the compressor is connected with a third interface of the four-way reversing valve, a second interface of the four-way reversing valve is respectively connected with an outlet of the fifth throttle valve and an inlet of the first valve through the outdoor heat exchanger, and the liquid outlet of the intercooler is connected with an inlet of the fifth throttle valve through the second valve; the exhaust port of the intercooler is connected with the air supplementing port of the compressor, the second port of the indoor heat exchanger is respectively connected with the inlet of the intercooler and the outlet of the first valve through the fourth throttle valve, and the first port of the indoor heat exchanger is connected with the fourth port of the four-way reversing valve; when in cooling operation in summer, working medium is compressed and boosted by the compressor, then enters the outdoor heat exchanger through the four-way reversing valve to be condensed and radiated, enters the fourth throttle valve through the first valve to be throttled and depressurized after being condensed and radiated, enters the indoor heat exchanger to be evaporated and absorbed, generates refrigeration phenomenon, and then returns to the compressor through the four-way reversing valve to complete cooling circulation; when the indoor heat exchanger is used for heating in winter, working media are compressed and boosted by the compressor and then enter the indoor heat exchanger through the four-way reversing valve to be condensed and radiated, a heating phenomenon is generated, the working media are condensed and radiated in the indoor heat exchanger and then enter the intercooler through the fourth throttling valve to be throttled and depressurized, throttled flash gas enters the compressor to supplement air through the intercooler, throttled liquid enters the fifth throttling valve to be throttled and depressurized through the intercooler and the second valve, and the throttled and depressurized working media are evaporated and absorbed in the outdoor heat exchanger and then return to the compressor through the four-way reversing valve to complete heating circulation; the first valve and the second valve are one-way valves or electromagnetic valves; the compressor is a scroll compressor, a rotor compressor, a screw compressor or a piston compressor.
4. A heat pump system with intermediate make-up as defined in claim 3, wherein the outdoor heat exchanger and indoor heat exchanger are air-cooled heat exchangers or water-cooled heat exchangers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810073165.XA CN108088109B (en) | 2018-01-25 | 2018-01-25 | Heat pump system with middle air supplementing function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810073165.XA CN108088109B (en) | 2018-01-25 | 2018-01-25 | Heat pump system with middle air supplementing function |
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| CN108088109A CN108088109A (en) | 2018-05-29 |
| CN108088109B true CN108088109B (en) | 2024-04-05 |
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| CN201810073165.XA Active CN108088109B (en) | 2018-01-25 | 2018-01-25 | Heat pump system with middle air supplementing function |
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| CN102032705A (en) * | 2010-12-22 | 2011-04-27 | 天津商业大学 | Two-stage compression heat pump system |
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| CN108088109A (en) | 2018-05-29 |
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