CN205227958U - Heat pump -type air conditioning system for rail vehicle - Google Patents
Heat pump -type air conditioning system for rail vehicle Download PDFInfo
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- CN205227958U CN205227958U CN201521047882.3U CN201521047882U CN205227958U CN 205227958 U CN205227958 U CN 205227958U CN 201521047882 U CN201521047882 U CN 201521047882U CN 205227958 U CN205227958 U CN 205227958U
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Abstract
The utility model discloses heat pump -type air conditioning system for rail vehicle contains air conditioner major loop and heat pump defrosting branch road: the air conditioner major loop includes the I th, the II th indoor heat exchanger, I, the II th four -way reversing valve, I, the II th electronic expansion valve, I, the II th compressor, I, the II th outdoor heat exchanger and connecting line, heat pump defrosting branch road includes first, second, the three defrosting branch road of third, can first and second switch -on and the disconnections that defrost branch roads of independent control through the solenoid valve, can adjust the refrigerant flow that the place is first, the second defrosts the branch road through the governing valve. The utility model discloses increased three supplementary defrosting branch road, the pressure that can control outdoor heat exchanger through three supplementary defrosting branch road under the heat pump operating mode is not less than the setting value with the temperature, and outdoor heat exchanger does not frost when making the air conditioner move, if meet the outdoor extreme condition, electronic expansion valve is closed to the accessible, makes whole refrigerants of air conditioning system get into outdoor heat exchanger through three defrosting branch road, accomplishes defrosting heat pump cycle.
Description
Technical field
The present invention relates to the design and manufaction technical field of railway vehicle air conditioner system, specifically, is a kind of heat pump type air corditioning system used for rail vehicle, is mainly supplied to the compartment application that urban track traffic uses.
Background technology
In urban construction, means of transportation are one of key projects.Present stage, in China big city, the construction of subway, light rail is commonplace, and track traffic has become the important step of urban construction.The development of track traffic has driven the development of rail vehicle.And present rail vehicle does not have air-conditioning system to be inconceivable.In recent years, in the design and manufaction of track vehicle air conditioner, start to use heat pump techniques.Because this technology progressively obtains accreditation and the favorable comment in market, its research and development are obtained and pays close attention to widely.
Heat pump type air corditioning system can meet the demand of cold, the winter heating of rail vehicle summer restraining.But present heat pump type air corditioning system used for rail vehicle comes with some shortcomings, and its main manifestations is: when the operating mode of heat pump type air corditioning system is in winter heating operation, outdoor heat exchanger uses as evaporimeter, and it absorbs heat from environment.But because the environment temperature in winter is lower, easily there is the phenomenon of frosting in outdoor heat exchanger, and this can affect the heating performance of outdoor heat exchanger.In addition, the Defrost method that heat pump type air corditioning system is commonly used at present judges whether to need to enter defrost state according to outdoor coil pipe used variations in temperature.When needs defrost, air-conditioning system needs operation suspension, by regulating four-way change-over valve, the running status of air-conditioning system is switched to refrigeration mode by heat pump mode, that is, during defrosting, air-conditioning system is that refrigerating state runs, and can not provide heat in compartment, also can absorb heat for defrosting in compartment simultaneously, this will cause the decline of compartment temperature, affects the comfortableness taken.Therefore, how designing effective Defrost mode is the pressing issues that current track vehicle heat pump type air corditioning system needs to solve.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of heat pump type air corditioning system used for rail vehicle is provided, it can avoid the frosting of air-conditioning system outdoor heat exchanger under heat pump working condition, avoids the situation that can have a strong impact on temperature and ride quality in compartment during conventional heat pump air-conditioner defrosting.
For achieving the above object, the utility model have employed technical scheme.
A kind of heat pump type air corditioning system used for rail vehicle, containing air-conditioning major loop, Defrost branch road, it is characterized in that, described air-conditioning major loop comprises the Ith indoor heat exchanger, the IIth indoor heat exchanger, the Ith four-way change-over valve, the IIth four-way change-over valve, the Ith electric expansion valve, the IIth electric expansion valve, the Ith compressor, the IIth compressor, the Ith outdoor heat exchanger, the IIth outdoor heat exchanger and connecting line thereof; Described Defrost branch road comprises the first defrosting branch road, the second defrosting branch road and the 3rd defrosting branch road: the front end of described first defrosting branch road connects at described Ith indoor heat exchanger, the IIth indoor heat exchanger and between the Ith electric expansion valve and the IIth electric expansion valve, containing the Ith magnetic valve, the IIth magnetic valve and the Ith control valve that connect successively and the IIth control valve; The front end of described second defrosting branch road connects between the exhaust end of described Ith compressor, the IIth compressor and described Ith four-way change-over valve, the IIth four-way change-over valve, containing the IIIth magnetic valve, the IVth magnetic valve and the IIIth control valve that connect successively and the IVth control valve; The branch road that defrosts of first defrosting branch road and described second described in described 3rd defrosting route merges and connects and composes, it is connected to described Ith electric expansion valve and the IIth electric expansion valve and between described Ith outdoor heat exchanger and the IIth outdoor heat exchanger, includes the Ith check valve and the IIth check valve; Described first defrosting branch road and described second defrost branch road merge be connected before be provided with the pipeline structure of mutual heat exchange.
Further, the connecting and disconnecting of described first defrosting branch road and the second defrosting branch road independently can be controlled by described Ith magnetic valve, the IIth magnetic valve, the IIIth magnetic valve and the IVth magnetic valve.
Further, described Ith control valve, the IIth control valve, the IIIth control valve, the IVth control valve are manual modulation valve or electric control valve.
Further, place first can be regulated to defrost the refrigerant flow of branch road by described Ith control valve and the IIth control valve, place second can be regulated to defrost the refrigerant flow of branch road by described IIIth control valve and the IVth control valve.
Further, when described Ith electric expansion valve and the IIth electric expansion valve are closed, the cold-producing medium of air-conditioning system all can enter described Ith outdoor heat exchanger and the IIth outdoor heat exchanger via described first defrosting branch road, the second defrosting branch road and described 3rd defrosting branch road.
The good effect of the utility model heat pump type air corditioning system used for rail vehicle is:
(1) on the basis of existing heat pump type air corditioning system used for rail vehicle, three assisting defrosting branch roads are added: the first defrosting branch road, the second defrosting branch road and the 3rd defrosting branch road.
(2) under heat pump working condition, first defrosting branch road can by the high-temperature exhaust air of compressor access the 3rd defrosting branch road, second defrosting branch road can by warm refrigerant liquid access the 3rd defrosting branch road in the high pressure in condenser, and the 3rd defrosting branch road can be connected to outdoor heat exchanger by after the heat energy mixing of the first defrosting branch road and the second defrosting branch road; By the acting in conjunction of three assisting defrosting branch roads, setting value can be not less than at the pressure and temperature heating control room external heat exchanger under pump condition, outdoor heat exchanger frost-free when air-conditioning system is run.
(3) by control to electronic expansion valve opening, can regulate via indoor heat exchanger, electric expansion valve to the refrigerant flow of outdoor heat exchanger; Like this, when under heat pump working condition, outdoor environment is exceedingly odious, close electric expansion valve, the cold-producing medium of air-conditioning system all enters outdoor heat exchanger via the first defrosting branch road, the second defrosting branch road and the 3rd defrosting branch road, can complete the defrosting heat pump circulation of air-conditioning system.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model heat pump type air corditioning system used for rail vehicle.
Fig. 2 is the schematic diagram that the utility model heat pump type air corditioning system used for rail vehicle runs in exceedingly odious situation.
Label in figure is respectively:
1, the Ith indoor heat exchanger; 2, the IIth indoor heat exchanger;
3, the Ith four-way change-over valve; 4, the IIth four-way change-over valve;
5, the Ith magnetic valve; 6, the IIth magnetic valve;
7, the IIIth magnetic valve; 8, the IVth magnetic valve;
9, the Ith control valve; 10, the IIth control valve;
11, the IIIth control valve; 12, the IVth control valve;
13, the Ith electric expansion valve; 14, the IIth electric expansion valve;
15, the Ith compressor; 16, the IIth compressor;
17, the Ith check valve; 18, the IIth check valve;
19, the Ith outdoor heat exchanger; 20, the IIth outdoor heat exchanger.
Detailed description of the invention
Further illustrate the detailed description of the invention of the utility model heat pump type air corditioning system used for rail vehicle below in conjunction with accompanying drawing, but it is noted that enforcement of the present utility model is not limited to following embodiment.
See Fig. 1.A kind of heat pump type air corditioning system used for rail vehicle, containing air-conditioning major loop, Defrost branch road; Described air-conditioning major loop comprises the Ith indoor heat exchanger 1, the IIth indoor heat exchanger 2; Ith four-way change-over valve 3, the IIth four-way change-over valve 4; Ith electric expansion valve 13, the IIth electric expansion valve 14; Ith compressor 15, the IIth compressor 16; Ith outdoor heat exchanger 19, the IIth outdoor heat exchanger 20; Described parts are connected in turn by connecting line.Because these can be accomplished by prior art, therefore no longer launch here to describe.
Feature of the present utility model is: on the basis of existing heat pump type air corditioning system used for rail vehicle, be provided with three assisting defrosting branch roads, and namely described Defrost branch road comprises the first defrosting branch road, the second defrosting branch road and the 3rd defrosting branch road.
The front end of described first defrosting branch road connects at described Ith indoor heat exchanger 1, the IIth indoor heat exchanger 2 and between the Ith electric expansion valve 13 and the IIth electric expansion valve 14, containing the Ith magnetic valve 5, the IIth magnetic valve 6 and the Ith control valve 9 that connect successively and the IIth control valve 10.
The front end of described second defrosting branch road connects between the exhaust end of described Ith compressor 15, the IIth compressor 16 and described Ith four-way change-over valve 3, the IIth four-way change-over valve 4, containing the IIIth magnetic valve 7, the IVth magnetic valve 8 and the IIIth control valve 11 that connect successively and the IVth control valve 12.
The branch road that defrosts of first defrosting branch road and described second described in described 3rd defrosting route merges and connects and composes, it is connected to described Ith electric expansion valve 13 and the IIth electric expansion valve 14 and between described Ith outdoor heat exchanger 19 and the IIth outdoor heat exchanger 20, includes the Ith check valve 17 and the IIth check valve 18.
The connecting and disconnecting of described first defrosting branch road, the second defrosting branch road control by described Ith magnetic valve 5, the IIth magnetic valve 6, the IIIth magnetic valve 7 and the IVth magnetic valve 8 are independent, complete defrost process via described 3rd defrosting branch road.
The kind of refrigeration cycle of the utility model heat pump type air corditioning system used for rail vehicle is carried out according to following flow process:
Ith compressor 15 and the IIth compressor 16 are discharged after the low-temp low-pressure gaseous refrigerant boil down to high temperature and high pressure gaseous refrigerant of suction, the liquid refrigerant that the Ith outdoor heat exchanger 19 and the IIth outdoor heat exchanger 20 are condensed into temperature in high pressure is entered by the Ith four-way change-over valve 3 and the IIth four-way change-over valve 4, then the reducing pressure by regulating flow passing through the Ith electric expansion valve 13 and the IIth electric expansion valve 14 forms the liquid refrigerant of low-temp low-pressure, finally enter the Ith indoor heat exchanger 1 and the IIth indoor heat exchanger 2, export the refrigerating capacity of air-conditioning system, absorb the heat of compartment inner circulating air.
The heat pump cycle of the utility model heat pump type air corditioning system used for rail vehicle carries out according to following flow process:
Ith compressor 15 and the IIth compressor 16 are discharged after the gaseous refrigerant boil down to high temperature and high pressure gaseous refrigerant of the low-temp low-pressure of suction, the Ith indoor heat exchanger 1 and the IIth indoor heat exchanger 2 condensation heat release is entered by the Ith four-way change-over valve 3 and the IIth four-way change-over valve 4, export the heating capacity of heat pump cycle, increase the heat of compartment inner circulating air, the liquid refrigerant forming in high pressure temperature after condensation forms the liquid refrigerant of low-temp low-pressure by the reducing pressure by regulating flow of the Ith electric expansion valve 13 and the IIth electric expansion valve 14, finally enter the Ith outdoor heat exchanger 19 and the IIth outdoor heat exchanger 20.
The defrosting of the utility model heat pump type air corditioning system used for rail vehicle is carried out according to following flow process:
First defrosting branch road: the Ith compressor 15 and the IIth compressor 16 enter the Ith indoor heat exchanger 1 and the IIth indoor heat exchanger 2 by the Ith four-way change-over valve 3 and the IIth four-way change-over valve 4, then by the Ith magnetic valve 5 and the IIth magnetic valve 6 and the Ith control valve 9 and the IIth control valve 10, then merge and connect into the 3rd defrosting branch road.
Second defrosting branch road: the Ith compressor 15 is connected with the IVth control valve 12 by the IIIth magnetic valve 7, the IVth magnetic valve 8 and the IIIth control valve 11 successively with the IIth compressor 16, then merges and connects into the 3rd defrosting branch road.
3rd defrosting branch road: the branch road that defrosted by described first defrosting branch road and described second merges and is connected, form the 3rd branch road, then through the Ith outdoor heat exchanger 19 and the IIth outdoor heat exchanger 20, then be communicated with the IIth compressor 16 with the Ith compressor 15 with the IIth four-way change-over valve 4 by the Ith four-way change-over valve 3.
Under heat pump working condition, heat pump type air corditioning system used for rail vehicle passes through the pressure and temperature of detection the Ith outdoor heat exchanger 19 and the IIth outdoor heat exchanger 20, when described pressure and temperature acquires a certain degree, can by the Ith magnetic valve 5, IIth magnetic valve 6, IIIth magnetic valve 7 and the IVth magnetic valve 8 are opened (owing to passing through described Ith magnetic valve 5, IIth magnetic valve 6, IIIth magnetic valve 7 and the IVth magnetic valve 8 independently can control the connecting and disconnecting of described first defrosting branch road and the second defrosting branch road, by described Ith control valve 9, defrost the refrigerant flow of branch road at the IIth adjustable place of control valve 10 first, by described IIIth control valve 11, defrost the refrigerant flow of branch road at the IVth adjustable place of control valve 12 second), the Ith outdoor heat exchanger 19 can be made via described 3rd defrosting branch road from warm liquid refrigerant in the high pressure of the first defrosting branch road with from the high temperature and high pressure gaseous refrigerant of the second defrosting branch road, there is not the phenomenon of frosting or complete defrost process in the IIth outdoor heat exchanger 20.
Under heat pump working condition, when outdoor environment is exceedingly odious, by closing the Ith electric expansion valve 13 and the IIth electric expansion valve 14(see Fig. 2), make the cold-producing medium of air-conditioning system all enter the Ith outdoor heat exchanger 19, the IIth outdoor heat exchanger 20 via described first defrosting branch road, the second defrosting branch road and the 3rd defrosting branch road, complete the defrosting heat pump circulation of air-conditioning system.
Claims (5)
1. a heat pump type air corditioning system used for rail vehicle, containing air-conditioning major loop, Defrost branch road, it is characterized in that, described air-conditioning major loop comprises the Ith indoor heat exchanger (1), the IIth indoor heat exchanger (2), the Ith four-way change-over valve (3), the IIth four-way change-over valve (4), the Ith electric expansion valve (13), the IIth electric expansion valve (14), the Ith compressor (15), the IIth compressor (16), the Ith outdoor heat exchanger (19), the IIth outdoor heat exchanger (20) and connecting line thereof; Described Defrost branch road comprises the first defrosting branch road, the second defrosting branch road and the 3rd defrosting branch road: the front end of described first defrosting branch road connects and is positioned at described Ith indoor heat exchanger (1), the IIth indoor heat exchanger (2) with between the Ith electric expansion valve (13) and the IIth electric expansion valve (14), contains the Ith magnetic valve (5), the IIth magnetic valve (6) and the Ith control valve (9) that connect successively and the IIth control valve (10); The front end of described second defrosting branch road connects and is positioned between described Ith compressor (15), exhaust end and described Ith four-way change-over valve (3) of the IIth compressor (16), the IIth four-way change-over valve (4), contains the IIIth magnetic valve (7), the IVth magnetic valve (8) and the IIIth control valve (11) and the IVth control valve (12) that connect successively; The branch road that defrosts of first defrosting branch road and described second described in described 3rd defrosting route merges and connects and composes, it is connected to described Ith electric expansion valve (13) and the IIth electric expansion valve (14) and between described Ith outdoor heat exchanger (19) and the IIth outdoor heat exchanger (20), includes the Ith check valve (17) and the IIth check valve (18); Described first defrosting branch road and described second defrost branch road merge be connected before be provided with the pipeline structure of mutual heat exchange.
2. heat pump type air corditioning system used for rail vehicle according to claim 1, it is characterized in that, independently can be controlled the connecting and disconnecting of described first defrosting branch road and the second defrosting branch road by described Ith magnetic valve (5), the IIth magnetic valve (6), the IIIth magnetic valve (7) and the IVth magnetic valve (8).
3. heat pump type air corditioning system used for rail vehicle according to claim 1, is characterized in that, described Ith control valve (9), the IIth control valve (10), the IIIth control valve (11) and the IVth control valve (12) are manual modulation valve or electric control valve.
4. heat pump type air corditioning system used for rail vehicle according to claim 3, it is characterized in that, place first can be regulated to defrost the refrigerant flow of branch road by described Ith control valve (9) and the IIth control valve (10), place second can be regulated to defrost the refrigerant flow of branch road by described IIIth control valve (11) and the IVth control valve (12).
5. heat pump type air corditioning system used for rail vehicle according to claim 1, it is characterized in that, when described Ith electric expansion valve (13) and the IIth electric expansion valve (14) are closed, the cold-producing medium of air-conditioning system enters described Ith outdoor heat exchanger (19) and the IIth outdoor heat exchanger (20) via described first defrosting branch road, the second defrosting branch road and described 3rd defrosting branch road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521047882.3U CN205227958U (en) | 2015-12-16 | 2015-12-16 | Heat pump -type air conditioning system for rail vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521047882.3U CN205227958U (en) | 2015-12-16 | 2015-12-16 | Heat pump -type air conditioning system for rail vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN205227958U true CN205227958U (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521047882.3U Active CN205227958U (en) | 2015-12-16 | 2015-12-16 | Heat pump -type air conditioning system for rail vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114604282A (en) * | 2022-04-11 | 2022-06-10 | 中车青岛四方机车车辆股份有限公司 | Rail vehicle air conditioning system and rail vehicle |
-
2015
- 2015-12-16 CN CN201521047882.3U patent/CN205227958U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114604282A (en) * | 2022-04-11 | 2022-06-10 | 中车青岛四方机车车辆股份有限公司 | Rail vehicle air conditioning system and rail vehicle |
| CN114604282B (en) * | 2022-04-11 | 2024-04-02 | 中车青岛四方机车车辆股份有限公司 | Rail vehicle air conditioning system and rail vehicle |
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