LU502089B1 - A Heat Pump Air Conditioning System for Electric Vehicle - Google Patents

A Heat Pump Air Conditioning System for Electric Vehicle Download PDF

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Publication number
LU502089B1
LU502089B1 LU502089A LU502089A LU502089B1 LU 502089 B1 LU502089 B1 LU 502089B1 LU 502089 A LU502089 A LU 502089A LU 502089 A LU502089 A LU 502089A LU 502089 B1 LU502089 B1 LU 502089B1
Authority
LU
Luxembourg
Prior art keywords
heat exchanger
outdoor heat
compressor
valve
outdoor
Prior art date
Application number
LU502089A
Other languages
French (fr)
Inventor
Jingting Liu
Yongxing Song
Linhua Zhang
Original Assignee
Univ Shandong Jianzhu
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ Shandong Jianzhu filed Critical Univ Shandong Jianzhu
Priority to LU502089A priority Critical patent/LU502089B1/en
Application granted granted Critical
Publication of LU502089B1 publication Critical patent/LU502089B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H1/00899—Controlling the flow of liquid in a heat pump system
    • B60H1/00907—Controlling the flow of liquid in a heat pump system where the flow direction of the refrigerant changes and an evaporator becomes condenser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3205—Control means therefor
    • B60H1/3213—Control means therefor for increasing the efficiency in a vehicle heat pump
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H2001/00935—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising four way valves for controlling the fluid direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H2001/00949—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising additional heating/cooling sources, e.g. second evaporator

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The invention provides a heat pump air conditioning system for electric vehicle, which comprises a compressor, a first outdoor heat exchanger and an indoor heat exchanger, wherein the outlet end of the compressor is controllably connected or interrupted with the first ends of the first outdoor heat exchanger and the indoor heat exchanger respectively, The second ends of the first outdoor heat exchanger and the indoor heat exchanger are both communicated back to the inlet end of the compressor, and the second outdoor heat exchanger is also included. The second outdoor heat exchanger is adjacent to the first outdoor heat exchanger, and a blower is arranged between the first outdoor heat exchanger and the second outdoor heat exchanger; It can effectively remove the excess frost on the surface of the outdoor heat exchanger without stopping the compressor and continuously supplying heat, keep the frost crystals on the surface of the outdoor heat exchanger in an independent dispersed state, and improve the heat exchange efficiency of the outdoor heat exchanger.

Description

DESCRIPTION A Heat Pump Air Conditioning System for Electric Vehicle LU502089
FIELD OF THE INVENTION
[0001] The invention relates to the technical field of automobile air conditioning, in particular to an electric automobile heat pump air conditioning system.
BACKGROUND OF THE RELATED ART
[0002] When the new energy automobile air-conditioning system runs in the outdoor environment of low temperature and high humidity in winter, the surface of the outdoor heat exchanger will frost, which will lead to the decrease of heat exchange efficiency. Therefore, the search for an efficient defrosting and frost suppression method has attracted the attention of domestic and foreign scholars.
[0003] In the early stage of frost formation, the independently dispersed frost crystals are similar to fins, which can enhance heat transfer, but with the passage of time, the whole cold surface is gradually covered by frost crystals, forming a continuous frost layer.
[0004] During the inventor's research, he found that there are at least the following shortcomings and deficiencies in the prior art:
[0005] At present, electric vehicles have the congenital defect of low battery energy density, so electric vehicles have higher requirements for defrosting of heat pump air conditioners, which should meet the requirements of low energy consumption, fast defrosting speed and good comfort. Phase change energy storage defrosting requires the introduction of energy storage components, which greatly improves the defrosting speed, but the energy consumption is too high due to its energy storage efficiency. Reverse defrosting uses reverse Carnot cycle to achieve the purpose of defrosting, but the mechanical impact is large, and a large amount of heat is continuously absorbed from the interior of the car, resulting in large temperature fluctuations in the car. Hot gas bypass defrosting relies on the heat storage and power consumption of the compressor to provide defrosting heat. As the suction temperature, the attenuation of the input power of the compressor and the small pressure difference between suction and exhaust will all lead to the continuous decrease of the exhaust temperature in the frost layer melting stage, the stamina of bypass defrosting is insufficient, and the defrosting speed drops obviously.
SUMMARY OF THE INVENTION 1
DESCRIPTION
[0006] Based on the above shortcomings of the prior art, the present invention provides a LU502089 heat pump air conditioning system for electric vehicle, which can effectively remove the excess frost on the surface of the outdoor heat exchanger under the condition that the compressor does not stop and continuously supply heat, so that frost crystals on the surface of the outdoor heat exchanger are kept in an independent dispersed state, and the heat exchange efficiency of the outdoor heat exchanger is improved.
[0007] To solve the above technical problems, the invention is realized by the following technical scheme:
[0008] A heat pump air conditioning system for electric vehicle comprises a compressor, a first outdoor heat exchanger and an indoor heat exchanger, wherein the outlet end of the compressor is controllably connected or interrupted with the first ends of the first outdoor heat exchanger and the indoor heat exchanger, and the second ends of the first outdoor heat exchanger and the indoor heat exchanger are both connected back to the inlet end of the compressor; Characterized in that: Also comprises a second outdoor heat exchanger, wherein the second outdoor heat exchanger is arranged close to the first outdoor heat exchanger, And a blower is arranged between the first outdoor heat exchanger and the second outdoor heat exchanger, and the blower can blow the heat emitted by condensation of the second outdoor heat exchanger to the first outdoor heat exchanger to remove or weaken the frosting on the outer surface of the first outdoor heat exchanger; The first end of the second outdoor heat exchanger is communicated with the outlet end of the compressor through a valve, and the second end of the second outdoor heat exchanger is communicated with the second end of the first outdoor heat exchanger through a one-way expansion valve, which flows from the second outdoor heat exchanger to the first outdoor heat exchanger.
[0009] The side of the indoor heat exchanger can also be equipped with a blower for blowing heat to fully flow in the interior space of the automobile.
[0010] The passage between the second end of the first outdoor heat exchanger and the second end of the indoor heat exchanger is also provided with a two-way expansion valve, which enables the first outdoor heat exchanger and the indoor heat exchanger to act as evaporators.
[0011] The heat pump air conditioning system for electric vehicle also comprises a gas- liquid separator, a filter and a four-way valve, wherein the outlet end of the compressor is connected with the filter and the four-way valve in sequence; two ports of the four-way valve are respectively connected with the first outdoor heat exchanger and the outdoor heat 2
DESCRIPTION exchanger; the other port of the four-way valve is connected with a ventilation liquid LU502089 separator; and the outlet of the gas-liquid separator is connected with the inlet end of the compressor; The four-way valve can make its four ports communicate pairwise, so as to control the communication or cut-off between the first outdoor heat exchanger and the indoor heat exchanger, the compressor and the gas-liquid separator.
[0012] The valve between the second outdoor heat exchanger and the outlet end of the compressor comprises an on-off control valve and an electromagnetic valve, wherein the on- off control valve is controlled to realize the on-off of the flow path between the compressor and the second outdoor heat exchanger, and the electromagnetic valve is used for controlling the fluid flow from the outlet end of the compressor to the second outdoor heat exchanger in a circulating state.
[0013] The heat pump air condition system of that electric vehicle also comprises a control, wherein the controller controls the action of the compressor and controls the open and closing of the electromagnetic valve, the on-off control valve, the one-way expansion valve and the two-way expansion valve; The controller is also used to control the start and stop of the two blowers.
[0014] A temperature sensor is also arranged at the outer surface of the first outdoor heat exchanger, and the temperature sensor transmits a signal to the controller, and the controller judges when to start the defrosting mode and controls the opening degree of the electromagnetic valve according to the signal. The signal is the temperature, which is set as the defrosting temperature when frost crystals on the surface of the first outdoor heat exchanger are kept in an independent dispersed state, and when the controller receives that the temperature transmitted by the temperature sensor is lower than the set defrosting temperature, the controller starts the system to defrost; When the temperature signal is higher than the set defrosting temperature, the system defrosting operation is stopped.
[0015] Furthermore, the electromagnetic valve is a 12V electromagnetic valve.
[0016] Furthermore, the first outdoor heat exchanger, the second outdoor heat exchanger and the indoor heat exchanger are parallel flow heat exchangers or tubular heat exchangers.
[0017] Further, the compressor is an electric scroll compressor.
[0018] The technical scheme provided by the invention has the advantages that: On the premise that the compressor does not stop, the four-way valve does not change direction and can continuously supply heat to the car, the excess frost on the surface of the outdoor heat exchanger is effectively removed, so that the frost crystals on the surface of the outdoor heat 3
DESCRIPTION exchanger are kept in an independent dispersed state, and the problems of intermittent heat LU502089 supply, poor system reliability, insufficient heat and incomplete defrosting of the hot gas bypass method are solved.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Fig. 1 is a schematic diagram of a heat pump air conditioning system for electric vehicle of the present invention;
[0020] Fig. 2 is a schematic diagram of the cooling mode of the heat pump air conditioning system for electric vehicle of the present invention;
[0021] Fig. 3 is a schematic diagram of the heating mode of the heat pump air conditioning system for electric vehicle of the present invention;
[0022] Fig. 4 is a schematic diagram of the control flow of the heat pump air conditioning system for electric vehicle of the present invention;
[0023] In the figures, the list of components represented by each reference number is as follows:
[0024] 1-The first outdoor heat exchanger; 2-The second outdoor heat exchanger;
[0025] 3-Unidirectional expansion valve; 4-Blower:
[0026] 5- Electromagnetic valve; 6- Valves;
[0027] 7- Gas separator; 8- Four-way valve;
[0028] 9- Filter; 10- Compressor;
[0029] 11- Controller; 12- Bidirectional expansion valve;
[0030] 13- Indoor heat exchanger; 14- Temperature sensor.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0031] The present invention will be further described in detail with reference to the following examples of the figures.
[0032] The implementation method of the present invention will be explained by the following specific examples, and those familiar with this technology can easily understand other advantages and effects of the present invention from the disclosure of this specification.
[0033] Referring to the figures, the structures, proportions, sizes, etc. shown in the figures in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented, so they have no technical 4
DESCRIPTION significance. Any modification of the structure, change of the proportion or adjustment of the LU502089 size should still fall within the scope of the technical content disclosed by the invention without affecting the efficacy and purpose of the invention. At the same time, the position limiting terms quoted in this specification are only for the convenience of description and clarity, and are not used to limit the scope of the invention. The change or adjustment of the relative relationship can also be regarded as the scope of the invention without substantially changing the technical content.
[0034] The invention provides a heat pump air conditioning system for electric vehicle, which is a dual-purpose automobile air conditioning system. Referring to Figure 1, it is a schematic diagram of the heat pump air conditioning system for electric vehicle. Comprises a first outdoor heat exchanger 1, a second outdoor heat exchanger 2, a one-way expansion valve 3, a blower 4, an electromagnetic valve 5, a valve 6, a gas-liquid separator 7, a four-way valve 8, a filter 9, a compressor 10, a controller 11, a two-way expansion valve 12, an indoor heat exchanger 13 and a temperature sensor 14. The outlet of the compressor 10 is controllably connected or interrupted with the inlet of the first outdoor heat exchanger 1, the inlet of the second outdoor heat exchanger 2 and the inlet of the indoor heat exchanger 13, respectively; The second outdoor heat exchanger 2 is communicated with the first outdoor heat exchanger 1 through a one-way expansion valve 3, and the one-way expansion valve 3 flows from the second outdoor heat exchanger 2 to the first outdoor heat exchanger 1. The outlet of the compressor 10 is also connected with a filter 9 and a four-way valve 8. Two ports of the four- way valve 8 are respectively connected with the first outdoor heat exchanger 1 and the outdoor heat exchanger 13, and the other port of the four-way valve 8 is connected with a ventilation liquid separator 7. The outlet of the gas-liquid separator 7 communicates with the inlet of the compressor 10; The first outdoor heat exchanger 1 and the outdoor heat exchanger 13 are both communicated back to the inlet of the compressor 10, and the first outdoor heat exchanger 1 and the outdoor heat exchanger 13 are also communicated through a two-way expansion valve 12; The filter 9 is located between the compressor 10 and the four-way valve 8; The first outdoor heat exchanger 1 and the second outdoor heat exchanger 2 are arranged adjacent to each other, and a blower 4 is arranged between the first outdoor heat exchanger 1 and the second outdoor heat exchanger 2. The blower 4 is used to blow the heat emitted by the second outdoor heat exchanger 2 to the first outdoor heat exchanger 1.
[0035] A valve 6 and an electromagnetic valve 5 are arranged between the compressor 10 and the second outdoor heat exchanger 2, and the valve 6 and the electromagnetic valve 5 control the on-off of the flow path between the compressor 10 and the second outdoor heat 5
DESCRIPTION exchanger 2. The four-way valve 8 can make its four ports communicate in pairs. Comprise a LU502089 controller 11, wherein that control 11 controls the action of the compressor 10 and controls the opening and close of the electromagnetic valve 5, the valve 6, the one-way expansion valve 3 and the two-way expansion valve 12; The controller 11 is also used to control the start and stop of the blower 4. A blower 4 is also installed outside the outdoor heat exchanger
13. The indoor heat exchanger 13 and the first outdoor heat exchanger 1 are respectively connected with the inlet end of the gas-liquid separator 7 through the four-way valve 8, and the four-way valve 8 controls the on-off of the flow path; The outlet end of the gas-liquid separator 7 is connected with the inlet end of the compressor 10. The air conditioning system designed by the invention has three operation modes, namely, defrosting mode, heating mode and cooling mode.
[0036] Defrost mode: This mode only operates in the heating mode. In this mode, the second outdoor heat exchanger 2 works, and the high-temperature and high-pressure refrigerant gas enters the second outdoor heat exchanger 2 from the outlet end of the compressor 10 through the valve 6 and the electromagnetic valve 5. After being condensed into liquid in the second outdoor heat exchanger 2, it enters the one-way expansion valve 3, and after throttling, it becomes low-temperature and low-pressure refrigerant, which evaporates into gas in the first outdoor heat exchanger 1, then passes through the four-way valve 8 to the gas-liquid separator 7, and finally returns to the compressor 10.
[0037] Heating mode: In this mode, the defrosting mode runs simultaneously. As shown in Figure 3, the valve 6 is opened and the outlet of the compressor 10 is divided into two paths. The high-pressure refrigerant gas enters the indoor heat exchanger 13 through the four-way valve 8 after removing impurities in the pipeline from the outlet of the compressor 10 through the filter 9. Condensed into liquid in the indoor heat exchanger 13, it enters the two-way expansion valve 12, and after throttling by the two-way expansion valve 12, it becomes low- temperature and low-pressure refrigerant, then flows into the first outdoor heat exchanger 1 and evaporates into gas, and then returns to the compressor 10 through the gas-liquid separator 7. At the same time, the signal of the temperature sensor 14 on the surface of the first outdoor heat exchanger 1 is transmitted to the controller 11, and the controller 11 controls the opening or closing of the valve 6 and the electromagnetic valve 5, and at the same time controls the opening of the electromagnetic valve 5 to adjust the flow into the second outdoor heat exchanger 2. After the valve 6 is opened, defrosting begins. The high- temperature and high-pressure refrigerant gas enters the second outdoor heat exchanger 2 from the outlet end of the compressor 10 through the electromagnetic valve 5, condenses into 6
DESCRIPTION liquid in the second outdoor heat exchanger 2, enters the one-way expansion valve 3, becomes LU502089 low-temperature and low-pressure refrigerant after throttling, evaporates into gas in the first outdoor heat exchanger 1, then passes through the four-way valve 8 to the gas-liquid separator 7, and finally returns to the compressor 10. In this mode, the port of the four-way valve 8 connected to the first outdoor heat exchanger 1 communicates with the port connected to the gas-liquid separator 7, and the port connected to the filter 9 communicates with the port connected to the indoor heat exchanger 13.
[0038] Cooling mode: Fig. 2 is a schematic diagram of the refrigeration mode of the heat pump air conditioning system of the electric vehicle of the present invention. High-pressure refrigerant gas enters the first outdoor heat exchanger 1 through the four-way valve 8 after removing impurities in the pipeline from the outlet of the compressor 10 through the filter 9. Condensed into liquid in the first outdoor heat exchanger 1, it enters the two-way expansion valve 12, and becomes low-temperature and low-pressure refrigerant after throttling. It evaporates into gas in the indoor heat exchanger 13, then passes through the four-way valve 8 to the gas-liquid separator 7, and finally returns to the compressor 10. In this mode, the valve 6 is closed, and among the four ports of the four-way valve 8, the port connected with the filter 9 is connected with the port connected with the first outdoor heat exchanger 1, and the port connected with the gas-liquid separator 7 is connected with the port connected with the indoor heat exchanger 13.
[0039] Under the three working modes, the working conditions of the first outdoor heat exchanger 1, the second outdoor heat exchanger 2 and the indoor heat exchanger 13 are shown in Table 1: exchanger exchanger exchanger Heating and Work as evaporator | Work as condenser | Work as condenser 5am [oer Work condenser [orks condenser
[0041] Table 1
[0042] Under the three working modes, the switching states of the one-way expansion valve 3, the two-way expansion valve 12, the valve 6 and the electromagnetic valve 5 are shown in Table 2: expansion valve |expansion valve valve defrosting mode 7
DESCRIPTION LU502089
[0044] Table 2
[0045] As shown in Table 1, in the heating mode, the first outdoor heat exchanger 1 is an evaporator, the second outdoor heat exchanger 2 is a condenser, and the indoor heat exchanger 13 is a condenser. In the cooling mode, the first outdoor heat exchanger 1 is a condenser, the second outdoor heat exchanger 2 does not work, and the indoor heat exchanger 13 is an evaporator. In the defrosting mode, the second outdoor heat exchanger 2 starts to work, and the refrigerant condenses and releases heat in the second outdoor heat exchanger 2. This heat is used to remove the excess frost on the surface of the first outdoor heat exchanger
1. And that principle of evaporator and condenser belong to the common knowledge of those skil in the art, so they will not be described in detail.
[0046] As shown in fig. 4, it is a schematic diagram of the control flow of the heat pump air conditioning system of the electric vehicle of the present invention, and the control flow of the controller 11 is as follows: The temperature sensor 14 on the surface of the first outdoor heat exchanger 1 sends a signal to the controller 11, and the controller 11 judges when to start the defrosting mode and the opening degree of the electromagnetic valve 5 according to the signal. When the frost crystals on the surface of the first outdoor heat exchanger 1 are kept in a state of independent dispersion, the temperature at this time is set as the defrosting temperature. If the surface temperature of the first outdoor heat exchanger 1 is lower than the defrosting temperature, start the defrosting mode. When the valve 6 is opened, the controller 11 controls the opening of the electromagnetic valve 5 according to the signal. The high- temperature and high-pressure refrigerant gas enters the second outdoor heat exchanger from the outlet end of the compressor 10 through the electromagnetic valve 5, and the refrigerant condenses and releases heat in the second outdoor heat exchanger 2. Part of the heat is used to remove the excess frost on the surface of the first outdoor heat exchanger 1, and the cycle is repeated until the signal from the temperature sensor 14 shows that the surface temperature of the first outdoor heat exchanger 1 is higher than the defrosting temperature. If the surface temperature of the first outdoor heat exchanger 1 is higher than the defrosting temperature, the valve 6 will not be opened until the signal from the temperature sensor 14 shows that the surface temperature of the first outdoor heat exchanger 1 is lower than the defrosting temperature, and the defrosting mode will be started. Whether the valve 6 is opened or not and the opening degree of the electromagnetic valve 5 changes with the surface temperature of the first outdoor heat exchanger 1, the controller 11 will always judge according to the signal, so as to control the valve 6 and the electromagnetic valve 5, and keep the frost 8
DESCRIPTION crystals on the surface of the first outdoor heat exchanger 1 in an independent and dispersed LU502089 state.
[0047] Although the specific example of the present invention has been described with reference to the figures, it is not limited to the protection scope of the present invention. It should be understood by those skilled in the art that on the basis of the technical scheme of the present invention, those skilled in the art can modify or deform various equivalent structures or equivalent processes of the present invention, or directly or indirectly apply them to other related technical fields, and still fall within the protection scope of the present invention.
9

Claims (9)

1. A heat pump air conditioning system for electric vehicle comprises a compressor, a LU502089 first outdoor heat exchanger and an indoor heat exchanger, wherein the outlet end of the compressor is controllably connected or interrupted with the first ends of the first outdoor heat exchanger and the indoor heat exchanger, and the second ends of the first outdoor heat exchanger and the indoor heat exchanger are both connected back to the inlet end of the compressor; Characterized in that: Also comprise a second outdoor heat exchanger, wherein that second outdoor heat exchange is arranged close to the first outdoor heat exchanger, and a blower is arrange between the first outdoor heat exchanger and the second outdoor heat exchanger; The first end of the second outdoor heat exchanger is communicated with the outlet end of the compressor through a valve, and the second end of the second outdoor heat exchanger is communicated with the second end of the first outdoor heat exchanger through a one-way expansion valve, which flows from the second outdoor heat exchanger to the first outdoor heat exchanger.
2. The system according to claim 1, further characterized in that a two-way expansion valve is arranged on the passage between the second end of the first outdoor heat exchanger and the second end of the indoor heat exchanger.
3. The system according to claim 2, further comprising a gas-liquid separator, a filter and a four-way valve, The outlet of the compressor is sequentially connected with a filter and a four-way valve, two ports of the four-way valve are respectively connected with the first outdoor heat exchanger and the outdoor heat exchanger, and the other port of the four-way valve is connected with a vent liquid separator, and the outlet of the gas-liquid separator is connected with the inlet of the compressor; The four-way valve can make its four ports communicate in pairs.
4. The system according to claim 1, further characterized in that the valve between the second outdoor heat exchanger and the outlet end of the compressor comprises an on-off control valve and an electromagnetic valve.
5. The system according to claim 3, further comprising a controller, wherein the controller controls the operation of the compressor and controls the opening and closing of the solenoid valve, the on-off control valve, the one-way expansion valve and the two-way expansion valve.
6. The system according to claim 5, further characterized in that, A temperature sensor is also arranged at the outer surface of the first outdoor heat exchanger, and the temperature sensor transmits a signal to the controller, wherein the signal is a temperature signal, and the temperature signal is compared with a set temperature, which is the temperature when frost 10
CLAIMS crystals on the surface of the first outdoor heat exchanger are kept in a state of independent LU502089 dispersion, to judge whether defrosting should be performed.
7. The system according to claim 1, further characterized in that the first outdoor heat exchanger, the second outdoor heat exchanger and the indoor heat exchanger are parallel flow heat exchangers or tubular heat exchangers; The compressor is an electric scroll Compressor.
8. The system according to claim 1, further characterized in that the side of the indoor heat exchanger is also provided with a blower.
9. The system according to claim 6, further characterized in that the system comprises a defrosting mode, a heating mode and a cooling mode; Among them: Operation of defrosting mode and heating mode synchronously: In this mode, the valve between the second outdoor heat exchanger and the compressor is open, the first outdoor heat exchanger works as an evaporator, the second outdoor heat exchanger works as a condenser, and the indoor heat exchanger works as a condenser.
Cooling mode: In this mode, the valve between the second outdoor heat exchanger and the compressor is closed, the first outdoor heat exchanger works as a condenser, the second outdoor heat exchanger does not work, and the indoor heat exchanger works as an evaporator.
11
LU502089A 2022-05-13 2022-05-13 A Heat Pump Air Conditioning System for Electric Vehicle LU502089B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
LU502089A LU502089B1 (en) 2022-05-13 2022-05-13 A Heat Pump Air Conditioning System for Electric Vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU502089A LU502089B1 (en) 2022-05-13 2022-05-13 A Heat Pump Air Conditioning System for Electric Vehicle

Publications (1)

Publication Number Publication Date
LU502089B1 true LU502089B1 (en) 2022-11-16

Family

ID=84046098

Family Applications (1)

Application Number Title Priority Date Filing Date
LU502089A LU502089B1 (en) 2022-05-13 2022-05-13 A Heat Pump Air Conditioning System for Electric Vehicle

Country Status (1)

Country Link
LU (1) LU502089B1 (en)

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Effective date: 20221116