CN208108529U - A kind of efficient gas compensating type heat pump air conditioning system - Google Patents
A kind of efficient gas compensating type heat pump air conditioning system Download PDFInfo
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- CN208108529U CN208108529U CN201820371131.4U CN201820371131U CN208108529U CN 208108529 U CN208108529 U CN 208108529U CN 201820371131 U CN201820371131 U CN 201820371131U CN 208108529 U CN208108529 U CN 208108529U
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- tonifying
- refrigeration
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- compressor
- heating
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Abstract
The utility model discloses a kind of efficient gas compensating type heat pump air conditioning systems, including：Compressor is sequentially communicated interior condenser, the first triple valve, vehicle external condenser, the second triple valve, drier, economizer, the first electric expansion valve, third triple valve, interior evaporator, suction port of compressor, constitutes refrigeration major loop；Major loop is heated, compressor, interior condenser, the first triple valve, drier, economizer, the first electric expansion valve, third triple valve, vehicle external condenser, third triple valve, interior evaporator, suction port of compressor are sequentially communicated；Cooling/heating gas tonifying branch is sequentially communicated dryer export, the second electric expansion valve, economizer, two electromagnet cut off valve, compressor in parallel；The utility model passes through the tonifying Qi circuit added using economizer, is freezing and can be carried out tonifying Qi under heating mode, and is selecting corresponding tonifying Qi hole with lifting system efficiency respectively under the conditions of refrigeration and heating by the control of solenoid valve.
Description
Technical field
The utility model relates to automobile air-conditioning refrigeration field more particularly to a kind of efficient gas compensating type heat pump air conditioning systems.
Background technique
Air conditioning for automobiles is improved by controlling interior temperature and humidity to keep environment inside car comfort, and by defrosting, demisting
Safety in running car is the maximum ancillary equipment that consumes energy in the important component and automobile in automobile.With tradition
Internal combustion engine automobile or hybrid vehicle compare, pure electric automobile is without engine as power source drive air-conditioning system
Refrigerating operaton is carried out, also without engine exhaust heat using to realize for warm defrosting.
Electric car needs to carry out winter heating by air-conditioning system, and therefore, air-conditioning system uses heat pump air conditioner more
System.For conventional heat pump air-conditioning system, there is a problem of low-temperature heating performance and the poor needs of high-temperature refrigeration performance
It is solved.
In existing technology, to solve heat pump air conditioning system low-temperature heating and high-temperature refrigeration performance it is poor mode it is main
There are two types of：Superposition type and gas compensating type.For electric automobile heat-pump air-conditioning system, gas compensating type is to solve a kind of row of this problem
Effective method.
With the development of gas compensating type heat pump system, economizer is wherein obtaining great application.Not only using economizer
The tonifying Qi for compressor may be implemented, additionally it is possible to which the degree of supercooling for improving refrigerant at condensator outlet increases the heating of system
Amount, has greatly improved for the efficiency of system.
Gas compensating type heat pump air conditioning system is complex, and previous people mostly use four-way reversing valve to be designed.However four-way
The processing technology of reversal valve is not still very mature, and it is preferable to be chiefly used in the working environments such as household electrical appliance, shakes lesser field.?
There can be certain hidden danger using the heat pump system of four-way reversing valve in electric car.And current existing electric automobile heat-pump air-conditioning
System hypothermia heating and high-temperature refrigeration performance are poor.
Utility model content
The utility model is to solve current technology shortcoming, provides a kind of efficient gas compensating type heat pump air conditioning system,
It is provided with the tonifying Qi hole that gas tonifying branch adds two kinds of different angles, by freezing under electromagnet cut off valve control refrigeration and heating condition
Agent can be by optimum tonifying Qi hole, thus the efficiency of lifting system.
Technical solution provided by the utility model is：A kind of gas compensating type electric heat pump air-conditioning system, which is characterized in that packet
It includes：
Freeze major loop comprising the compressor that is sequentially communicated, interior condenser, the first triple valve, vehicle external condenser, the
Two triple valves, drier, economizer, the first electric expansion valve, third triple valve and interior evaporator；
Heat major loop comprising compressor, the interior condenser, the first triple valve, drier, economy being sequentially communicated
Device, the first electric expansion valve, third triple valve, vehicle external condenser, third triple valve and interior evaporator；
Setting heating tonifying Qi hole and refrigeration tonifying Qi hole on the compressor；
Freeze gas tonifying branch, be sequentially communicated dryer export, the second electric expansion valve, economizer, refrigeration electromagnet cut off valve,
The refrigeration tonifying Qi hole of compressor；
Heat gas tonifying branch, be sequentially communicated dryer export, the second electric expansion valve, economizer, heating electromagnet cut off valve,
The heating tonifying Qi hole of compressor；
Economizer is divided into throttle chamber and Heat Room, and be respectively communicated with the refrigeration gas tonifying branch, heating gas tonifying branch with
In refrigeration major loop, and the throttle chamber is opposite with liquid flow direction in Heat Room；
When being in tonifying Qi refrigeration mode, the first triple valve of switching, the second triple valve and third triple valve make the refrigeration
Major loop and refrigeration gas tonifying branch be in connected state, the heating major loop and heat gas tonifying branch, at gas tonifying branch of freezing
In closed state；
When being in tonifying Qi heating mode, the first triple valve of switching, the second triple valve and third triple valve make the heating
Major loop and heating gas tonifying branch are at connected state, the refrigeration major loop and heating gas tonifying branch and refrigeration gas tonifying branch
In closed state.
Preferably, further include：
Gas-liquid separator is connected on the entrance of compressor.
Preferably, further include：
First electromagnet cut off valve is connected between compressor and interior condenser.
Preferably, further include：
When in refrigeration mode, the first triple valve of switching, the second triple valve and third triple valve disconnect refrigeration electromagnetism and cut
Only valve and heating electromagnet cut off valve make the refrigeration major loop be in connected state, heating major loop and refrigeration gas tonifying branch, system
Hot gas tonifying branch is in close state；
When being in heating mode, the first triple valve of switching, the second triple valve and third triple valve disconnect refrigeration electromagnetism and cut
Only valve and heating electromagnet cut off valve, the heating major loop are in connected state, refrigeration major loop and refrigeration gas tonifying branch, heating
Gas tonifying branch is in close state.
Preferably,
When being in defrosting mode, compressor is sequentially communicated interior condenser, vehicle external condenser and interior evaporator.
Preferably, further include：
The heating tonifying Qi hole and refrigeration tonifying Qi hole, open up angular distribution on the compressor with difference.
Preferably, further include：
Compressor uses Gas-supplying enthalpy-increasing formula screw compressor.
Preferably, further include：
First air door, setting by condenser, control its working condition in the car, heat mould in the heating mode and tonifying Qi
In running order when formula, remaining state does not work, the not work in the refrigeration mode, defrosting mode and tonifying Qi refrigeration mode
Make.
Preferably, further include：
Second air door, setting by evaporator, control its working condition in the car, the refrigeration mode, defrosting mode and
It is in running order when tonifying Qi refrigeration mode, it does not work in the heating mode and tonifying Qi heating mode.
Preferably, further include：
Blower, setting is by the interior evaporator.
Beneficial effect described in the utility model：1) increase tonifying Qi circulation loop, use triple valve as refrigerant flow path
Regulating valve, so that system is had better stability；2) according to tonifying Qi hole site best under heating condition and cooling condition
Difference opens up the tonifying Qi hole for heating tonifying Qi and tonifying Qi of freezing simultaneously on screw compressor fixed scroll, passes through control electricity
The mode of magnetic shut-off valve, so that refrigerant by different tonifying Qi holes enters screw compressor under different tonifying Qi operating condition, to make system
Efficiency gets a promotion.
Detailed description of the invention
Fig. 1 is a kind of efficient gas compensating type heat pump air conditioning system general structure schematic diagram described in the utility model.
Fig. 2 is summer car refrigeration work status diagram described in the utility model.
Fig. 3 is that winter car described in the utility model heats working state schematic representation.
Fig. 4 is defrosting mode working state schematic representation described in the utility model.
Fig. 5 is tonifying Qi refrigeration work status diagram described in the utility model.
Fig. 6 is that tonifying Qi described in the utility model heats working state schematic representation.
Fig. 7 is the system pressure-enthalpy chart described in the utility model that angle is opened up to calculate best tonifying Qi hole.
Fig. 8 is described in the utility model for the schematic diagram of the Machining of Vortex Disk of Vortex Compressor calculated.
Specific embodiment
The following describes the utility model in further detail with reference to the accompanying drawings, to enable those skilled in the art referring to explanation
Book text can be implemented accordingly.
As shown in Figure 1, compressor 01, is sequentially communicated interior condenser 03, the port ab of the first triple valve 04, vehicle condensed exterior
Device 05, the port ab of the second triple valve 06, drier 11, economizer 13, the first electric expansion valve 14, third triple valve 10 ab
Port, interior evaporator 07,01 entrance of compressor, constitute refrigeration major loop；
Major loop is heated, compressor 01, interior condenser 03, the port ac of the first triple valve 04, drier are sequentially communicated
11, economizer 13, the first electric expansion valve 14, the port ac of third triple valve 10, vehicle external condenser 05, third triple valve 10
The port ac, interior evaporator 07,01 entrance of compressor；
Setting heating tonifying Qi hole and refrigeration tonifying Qi hole on compressor 01；
Refrigeration gas tonifying branch is sequentially communicated the outlet of drier 11, the second electric expansion valve 12, economizer 13, refrigeration electromagnetism
The refrigeration tonifying Qi hole of shut-off valve 17, compressor 01；
Gas tonifying branch is heated, the outlet of drier 11, the second electric expansion valve 12, economizer 13, heating electromagnetism are sequentially communicated
The heating tonifying Qi hole of shut-off valve 18, compressor 01；
Economizer 13 is respectively communicated in the refrigeration gas tonifying branch, heating gas tonifying branch and refrigeration major loop, and is connected to
Contrary, liquid flow direction is opposite；Be configured to the tonifying Qi circuit refrigerant wherein in refrigerant major loop without
The refrigerant heat exchanger of throttling again returns to compressor 01.
Gas-liquid separator 09 is connected on the entrance of compressor 01.Tonifying Qi hole and refrigeration tonifying Qi hole are heated, angle is opened up with difference
Degree is distributed on compressor 01.Refrigeration electromagnet cut off valve 17 and heating electromagnet cut off valve 18 are arranged in parallel, and are connected on refrigeration and are mended
Gas branch heats at the suction port of compressor of gas tonifying branch；Refrigeration electromagnet cut off valve 17 and heating electromagnet cut off valve 18 can control
Refrigeration tonifying Qi hole and the switch state for heating tonifying Qi hole.Compressor 01 uses Gas-supplying enthalpy-increasing formula screw compressor.First air door 16,
Setting by condenser 03, controls its working condition in the car；Second air door 15, setting by evaporator 07, control its work in the car
Make state.Blower 08, setting is by the interior evaporator 07.
When being in tonifying Qi refrigeration mode, when being in tonifying Qi refrigeration mode, switch the first triple valve 04, the second triple valve
06 and third triple valve 10, so that the refrigeration major loop and refrigeration gas tonifying branch be in connected state, the heating major loop with
Heating gas tonifying branch is in close state；
When being in tonifying Qi heating mode, the first triple valve 04 of switching, the second triple valve 06 and third triple valve 10 make institute
It states heating major loop and heating gas tonifying branch is in connected state, the refrigeration major loop and refrigeration gas tonifying branch are in and close shape
State.
When being in tonifying Qi heating mode, the heating major loop and heating gas tonifying branch are in connected state.
The utility model can be realized multiple-working mode by the switching of triple valve, to meet the needs of different, work
Mode is as follows：
Summer car refrigeration mode：As shown in Fig. 2, through the compressed high-temperature high-pressure refrigerant of compressor 01 by refrigeration electricity
Into the car in condenser 03, first air door 16 is in close state magnetic shut-off valve 02 at interior condenser 03 at this time, interior cold
Condenser 03 does not work.The port a of the first triple valve 04 is flowed through after refrigerant, and is flowed out from port b, and subsequent refrigerant flows through outside vehicle
Condenser 05, vehicle external condenser 05 serves as condenser at this time, from vehicle external condenser 05 come out after, refrigerant flows through the second triple valve
06, entered by port a, and flowed out from port b, subsequent refrigerant flows through drier 11 and enters economizer 13, flows subsequently through first
Electric expansion valve 14 becomes low-temperature low-pressure refrigerant, flows subsequently through third triple valve 10, flows into from port a, and flows from port b
Out, interior evaporator 07 is flowed subsequently through, the second air door 15 is in the open state at this time, and last refrigerant flows through gas-liquid separator 09
Cocurrent returns compressor 01, realizes refrigeration cycle.
Winter car heats operating mode：As shown in figure 3, through the compressed high-temperature high-pressure refrigerant of compressor 01 by making
Cold electromagnet cut off valve 02 is into the car in condenser 03, and the first air door 16 is in the open state at this time, after flow through the first triple valve
04, enter from port a and flowed out from port c, subsequently enters drier 11, economizer 13 flows subsequently through the first electric expansion valve
14 become low-temperature low-pressure refrigerant, flow subsequently through third triple valve 10, are entered by port a and are flowed out from port c, flow subsequently through vehicle
External heat exchanger 5, vehicle external condenser 05 then serve as condenser, and subsequent refrigerant flows through the second triple valve 06, are entered simultaneously by port a
It is flowed out from port c, subsequent refrigerant flows through interior evaporator 07, and the second air door 15 is now in closed state, interior evaporator
07 without heat exchange, and subsequent refrigerant sequentially flows through gas-liquid separator 09 and compressor 01, realizes heating circulation.
Defrosting mode, as shown in figure 4, through the compressed high-temperature high-pressure refrigerant of compressor 1 by refrigeration electromagnet cut off valve
02 into the car in condenser 03, and the first air door 16 is in close state at this time, and interior condenser 03 does not exchange heat.After flow through first
Triple valve 4 is flowed into from port a, and is flowed out from port b, and subsequent refrigerant flows into vehicle external condenser 05, is flowed from vehicle external condenser 05
After out, refrigerant flows through the second triple valve 06, flows into from port a and flows out from port c, subsequent refrigerant flows through interior evaporator
07, the second air door 15 is now in closed state, and interior heat exchanger 07 does not work.Subsequent refrigerant flows through gas-liquid separator 09 simultaneously
Compressor 01 is finally flowed back to, realizes defrosting circulation.
Tonifying Qi refrigeration mode, as shown in figure 5, being cut through the compressed high-temperature high-pressure refrigerant of compressor 01 by refrigeration electromagnetism
Only valve 02 is into the car in condenser 03, and the first air door 16 is in close state at this time, and interior condenser 03 does not work.Then system
Cryogen flows through the first triple valve 04, is flowed by port a, and is flowed out by port b, and subsequent refrigerant enters vehicle external condenser 05, this
When vehicle external condenser 05 be used as condenser working.Subsequent refrigerant flows through the second triple valve 06, is entered by port a and by port b
It flows out subsequent refrigerant and flows through drier 11, subsequent refrigerant is shunted, and main circulation loop refrigerant flows subsequently through economizer
13, and exchange heat with the tonifying Qi circulation loop refrigerant for flowing into economizer 13, to increase degree of supercooling.Then the first electronics is flowed into
Expansion valve 14 becomes low-temperature low-pressure refrigerant, and refrigerant flows subsequently through third triple valve 10, is flowed by port a, and flowed by port b
Out, subsequent main circulation loop refrigerant flows through interior evaporator 07, and the second air door 15 is now in open state, subsequent major cycle
Circuit refrigerant flows through gas-liquid separator 09, and finally flows back to compressor 01, and tonifying Qi circulation loop refrigerant flows after shunting
Throttle through the second electric expansion valve 12, and become medium temperature and medium pressure refrigerant, subsequent tonifying Qi circulation loop refrigerant enter through
Ji device 13 simultaneously exchanges heat with main circulation loop refrigerant, and subsequent tonifying Qi circulation loop refrigerant is via refrigeration electromagnet cut off valve 17
The refrigeration tonifying Qi hole in compressor 01 is returned to, tonifying Qi is carried out to compressor.To complete entire tonifying Qi refrigeration cycle.
Tonifying Qi heating mode, as shown in fig. 6, being cut through the compressed high-temperature high-pressure refrigerant of compressor 1 by refrigeration electromagnetism
Only valve 02 is into the car in condenser 03, and the first air door 16 is in the open state at this time.After flow through the first triple valve 04, from port
A enters and flows out from port c.Subsequent refrigerant flows through drier 11, and subsequent refrigerant is shunted, wherein main circulation loop system
Cryogen flows through economizer 13 and exchanges heat with the tonifying Qi circulation loop refrigerant for flowing into economizer 13, to increase degree of supercooling, so
After flow into the first electric expansion valve 14 and become low-temperature low-pressure refrigerant, main circulation loop refrigerant flows subsequently through third triple valve
10, it is flowed by port a and is flowed out by port c, flow subsequently through vehicle external condenser 05, vehicle external heat exchanger then serves as evaporator, with
Main circulation loop refrigerant flows through the second triple valve 06 afterwards, and is entered by the end a and flowed out by the end c, evaporator into the car after outflow
07, the second air door 15 is now in closed state, and interior evaporator 07 does not exchange heat, and subsequent main circulation loop refrigerant flows through gas-liquid
Separator 09 simultaneously finally flows back to compressor 01, and tonifying Qi circulation loop refrigerant flowed through after shunting the second electric expansion valve 12 into
Row throttling, and become medium temperature and medium pressure refrigerant, subsequent tonifying Qi circulation loop refrigerant enters economizer 13 and and main circulation loop
Refrigerant exchanges heat, and subsequent tonifying Qi circulation loop refrigerant flows back to compressor 01 via refrigeration electromagnet cut off valve 18 and heats tonifying Qi
Hole carries out tonifying Qi to compressor 01, to complete entire tonifying Qi heating circulation.
As shown in fig. 7, be the pressure-enthalpy chart of system circulation, in figure each point correspond to system towards each under operating condition
The value of parameter point, the assignment not being fixed herein, wherein refrigerant condition when 1 point of corresponding screw compressor air-breathing
Point, 2 points of refrigerant condition points corresponded to when screw compressor is vented, 3 points corresponding to be freezed in main refrigerant circuit circuit
The refrigerant condition point in state point exit of the agent after economizer and tonifying Qi circulation loop refrigerant heat exchanger, 4 points corresponding to be
The refrigerant condition point in main circulation loop refrigerant throttle valve exit, it is that tonifying Qi circulation loop refrigerant is passing through that 5 points corresponding
Help the state point in device exit, 6 points corresponding be main circulation loop refrigerant and tonifying Qi circulation loop refrigerant within the compressor
The state point of mixed refrigerant, it is the parameter point of refrigerant at condensator outlet that 3 points corresponding.8 points of corresponding economizers go out
Gaseous refrigerant agent parameter at mouthful.
According to the change procedure of the property of pressure-enthalpy chart and refrigerant in each component, refrigeration and heating COP can be calculated to obtain
Expression formula be respectively
In formula：msFor the mass flow of main refrigerant circulation loop, i.e., the refrigerant quality of compressor is flowed back to by suction hole
Flow.miFor the mass flow of tonifying Qi circulation loop, i.e., the refrigerant mass fluxes of compressor, h are returned to by tonifying Qi hole1,h2,h3,
h5,h6,h7,h8The corresponding enthalpy of 7 points in respectively Fig. 7.
As shown in figure 8, the schematic diagram of the Machining of Vortex Disk of Vortex Compressor for calculating, the first discharge chambe A, the second discharge chambe B,
Third discharge chambe C difference is as shown in the figure, wherein D is movable orbiting scroll, and E is fixed scroll.According to compressing intraventricular pressure in screw compressor
The relationship of power and compressor corner, has
V in formulaiFor compression indoor pressure, p is vortex string pitch, and t is the thickness of scroll wrap, and i is the i-th discharge chambe of place, h
For the height of scroll wrap；Wherein i>1 and be integer.Because tonifying Qi hole is not opened in the first discharge chambe generally, when i=1 not
It is illustrated.
According to the above description, can according to system itself towards condition and each parameter point find out heating or refrigeration tonifying Qi
When the corresponding superfeed pressure of maximum COP, and pressed according to the place that superfeed pressure finds out heating tonifying Qi hole and cooling tonifying Qi hole
Contracting room and blowing angle open up the tonifying Qi hole of screw compressor.
In refrigeration and heating operations, relevant valve mechanism can control according to the pressure change of compressor air suction mouth and adjust
To realize the function of tonifying Qi.
It is not only in the description and the implementation although the embodiments of the present invention have been disclosed as above
Listed utilization, it can be applied to various fields suitable for the present invention completely, for those skilled in the art,
Other modifications may be easily implemented, therefore without departing from the general concept defined in the claims and the equivalent scope, this reality
It is not limited to specific details and legend shown and described herein with novel.
Claims (8)
1. a kind of efficient gas compensating type heat pump air conditioning system, which is characterized in that including：
Freeze major loop comprising compressor, the interior condenser, the first triple valve, vehicle external condenser, the two or three being sequentially communicated
Port valve, drier, economizer, the first electric expansion valve, third triple valve and interior evaporator；
Heat major loop comprising the compressor that is sequentially communicated, interior condenser, the first triple valve, drier, economizer, the
One electric expansion valve, third triple valve, vehicle external condenser, third triple valve and interior evaporator；
Setting heating tonifying Qi hole and refrigeration tonifying Qi hole on the compressor；
Refrigeration gas tonifying branch is sequentially communicated dryer export, the second electric expansion valve, economizer, refrigeration electromagnet cut off valve, compression
The refrigeration tonifying Qi hole of machine；
Gas tonifying branch is heated, dryer export, the second electric expansion valve, economizer, heating electromagnet cut off valve, compression are sequentially communicated
The heating tonifying Qi hole of machine；
Economizer is divided into throttle chamber and Heat Room, and is respectively communicated in the refrigeration gas tonifying branch, heating gas tonifying branch and refrigeration
In major loop, and the throttle chamber is opposite with liquid flow direction in Heat Room；
When being in tonifying Qi refrigeration mode, the first triple valve of switching, the second triple valve and third triple valve lead back the refrigeration
Road and refrigeration gas tonifying branch are in connected state, and the heating major loop and heating gas tonifying branch are in close state；
When being in tonifying Qi heating mode, the first triple valve of switching, the second triple valve and third triple valve lead back the heating
Road and heating gas tonifying branch are in connected state, and the refrigeration major loop and refrigeration gas tonifying branch are in close state.
2. efficient gas compensating type heat pump air conditioning system according to claim 1, which is characterized in that further include：
Gas-liquid separator is connected on the entrance of compressor.
3. efficient gas compensating type heat pump air conditioning system according to claim 1, which is characterized in that further include：
First electromagnet cut off valve is connected between compressor and interior condenser.
4. efficient gas compensating type heat pump air conditioning system according to claim 1, which is characterized in that further include：
The heating tonifying Qi hole and refrigeration tonifying Qi hole, open up angular distribution on the compressor with difference.
5. efficient gas compensating type heat pump air conditioning system according to claim 4, which is characterized in that further include：
The compressor uses Gas-supplying enthalpy-increasing formula screw compressor.
6. efficient gas compensating type heat pump air conditioning system according to claim 1, which is characterized in that further include：
First air door, setting by condenser, control its working condition, in the heating mode and tonifying Qi heating mode in the car
In running order, remaining state does not work, and does not work in the refrigeration mode, defrosting mode and tonifying Qi refrigeration mode.
7. efficient gas compensating type heat pump air conditioning system according to claim 1, which is characterized in that further include：
Second air door, setting by evaporator, control its working condition, in the refrigeration mode, defrosting mode and tonifying Qi in the car
It is in running order when refrigeration mode, it does not work in the heating mode and tonifying Qi heating mode.
8. efficient gas compensating type heat pump air conditioning system according to claim 1, which is characterized in that further include：
Blower, setting is by the interior evaporator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820371131.4U CN208108529U (en) | 2018-03-19 | 2018-03-19 | A kind of efficient gas compensating type heat pump air conditioning system |
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| CN201820371131.4U CN208108529U (en) | 2018-03-19 | 2018-03-19 | A kind of efficient gas compensating type heat pump air conditioning system |
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| CN208108529U true CN208108529U (en) | 2018-11-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240715A (en) * | 2018-03-19 | 2018-07-03 | 吉林大学 | A kind of efficient gas compensating type heat pump air conditioning system |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240715A (en) * | 2018-03-19 | 2018-07-03 | 吉林大学 | A kind of efficient gas compensating type heat pump air conditioning system |
| CN108240715B (en) * | 2018-03-19 | 2023-12-29 | 吉林大学 | High-efficient air supplementing type heat pump air conditioning system |
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Granted publication date: 20181116 Termination date: 20200319 |