CN107139685B

CN107139685B - Automobile, heat pump air conditioning system, automobile heat pump air conditioning assembly and control method of automobile heat pump air conditioning assembly

Info

Publication number: CN107139685B
Application number: CN201710464336.7A
Authority: CN
Inventors: 李俊峰; 陈华英; 韩雷; 王哲; 李康
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2017-06-19
Filing date: 2017-06-19
Publication date: 2023-05-23
Anticipated expiration: 2037-06-19
Also published as: CN107139685A

Abstract

The invention relates to a heat pump air conditioning system, an indoor heat exchanger comprises a refrigeration heat exchanger and a heating heat exchanger, an exhaust port of a compressor is communicated with a first main pipe, the main pipe is branched into a first branch pipe and a second branch pipe by a three-way valve A, the first branch pipe is communicated with a first port of an outdoor heat exchanger, the second branch pipe is communicated with the first branch pipe, a heating heat exchanger branch pipe led out from a second port of the heating heat exchanger is communicated with the first branch pipe, a second main pipe led out from a second port of the outdoor heat exchanger is branched into a third branch pipe and a fourth branch pipe by a three-way valve B, the third branch pipe is communicated with the first port of the refrigeration heat exchanger, the refrigerating heat exchanger branch pipe led out from a second port of the refrigeration heat exchanger is communicated with the fourth branch pipe and is converged into a third main pipe, and the main pipe is communicated with an air suction port of the compressor. The invention can quickly realize the conversion of the refrigerating and heating modes. The invention also relates to an automobile, an automobile heat pump air conditioner assembly and a control method of the automobile heat pump air conditioner assembly.

Description

Automobile, heat pump air conditioning system, automobile heat pump air conditioning assembly and control method of automobile heat pump air conditioning assembly

Technical Field

The invention relates to the technical field of automobile air conditioner production, in particular to an automobile, a heat pump air conditioner system, an automobile heat pump air conditioner assembly and a control method thereof.

Background

With the development of economy, people have higher and higher requirements on life quality, and the air conditioner not only enters families of common people, but also is widely applied to various vehicles.

With the development of technology, a conventional heat pump type air conditioner is applied to automobiles, particularly electric automobiles, and generally includes a compressor, a four-way valve, an external heat exchanger, a throttle valve, and an internal heat exchanger that constitute a refrigerant circuit, and when cooling is required, the internal heat exchanger is used as an evaporator, and when heating is required, the internal heat exchanger is used as a condenser by reversing the four-way valve.

Because the environment of the use of the vehicle is more changeable, the condition that the heat pump air conditioning system is used alternately for refrigerating and heating usually occurs, the conversion of the refrigerating and heating modes of the heat pump air conditioning system needs to be realized through the reversing of the four-way valve, the conversion of the high-low pressure pipeline is related during the reversing of the four-way valve, in order to ensure the safety of the heat pump air conditioning system, the compressor usually runs down or stops, the whole conversion process needs 2-4 minutes, the conversion process is slower, the comfort in the vehicle cannot meet the requirement, in some cases, the water mist is condensed on glass in the vehicle to form a fogging phenomenon, the driving safety is seriously influenced, therefore, the water mist on the glass must be removed in time, the heat pump air conditioning system is usually required to refrigerate, and if the heat pump air conditioning system is just in the heating state during the fogging, the heat pump air conditioning system needs to be reversed through the four-way valve, and the whole process also needs to last 2-4 minutes, which obviously forms a great threat to the safe driving.

Therefore, how to realize the rapid conversion of the cooling and heating modes of the heat pump air conditioning system is a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

One of the purposes of the invention is to provide a heat pump air conditioning system, so that the refrigerating and heating modes of an air conditioner can be quickly switched, and the comfort of a user is improved.

The invention also aims to provide an automobile heat pump air conditioner assembly formed by adopting the heat pump air conditioner system.

The invention also aims to provide a control method of the automobile heat pump air conditioner assembly.

The invention also aims to provide an automobile adopting the automobile heat pump air conditioner assembly.

In order to achieve the above object, the heat pump air conditioning system provided by the invention comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger, wherein the indoor heat exchanger comprises a refrigeration heat exchanger and a heating heat exchanger, an exhaust port of the compressor is communicated with a first main pipe, the first main pipe is branched into a first branch pipe and a second branch pipe by a three-way valve A, the first branch pipe is communicated with a first port of the outdoor heat exchanger, the second branch pipe is communicated with the first port of the heating heat exchanger, a heating heat exchanger branch pipe led out by a second port of the heating heat exchanger is communicated with the first branch pipe, a second main pipe led out by a second port of the outdoor heat exchanger is branched into a third branch pipe and a fourth branch pipe by a three-way valve B, the refrigeration heat exchanger branch pipe led out by a second port of the refrigeration heat exchanger is communicated with the fourth branch pipe and is converged into a third main pipe, the third main pipe is communicated with an air suction port of the compressor, and the third main pipe and the heating heat exchanger are provided with a heating device.

Preferably, the branch pipe of the heating heat exchanger is further connected with a flash device in series, and the flash device is communicated with the air supplementing port of the compressor through an air supplementing pipeline.

Preferably, two throttling devices are arranged on the branch pipe of the heating heat exchanger, and the two throttling devices are respectively positioned at the upstream end and the downstream end of the flash evaporator.

Preferably, the air supplementing pipeline is also provided with a one-way valve.

Preferably, the branch pipe of the heating heat exchanger is also connected with a check valve in series.

Preferably, the branch pipe of the refrigeration heat exchanger is also connected with a check valve in series.

Preferably, the third main pipe is further connected with a gas-liquid separator in series.

The invention discloses an automobile heat pump air conditioner assembly, which comprises the heat pump air conditioner system disclosed in any one of the above, and further comprises an HVAC box body, wherein a traction fan is arranged at a position close to an air inlet of the HVAC box body, the refrigeration heat exchanger and the heating heat exchanger are both positioned in the HVAC box body, and air flows introduced by the traction fan pass through the refrigeration heat exchanger and the heating heat exchanger.

Preferably, the refrigeration heat exchanger is located on the windward side, and the heating heat exchanger is located on the leeward side.

Preferably, an auxiliary heater disposed within the HVAC case is also included.

Preferably, the air conditioner further comprises a cold and warm air door, wherein when the cold and warm air door is positioned at the first position, the air flow does not pass through the auxiliary heater; when the cold and hot air door is positioned at the second position, a part of air flow passes through the auxiliary heater; when the cold and warm air door is positioned at the third position, the air flow completely passes through the auxiliary heater.

Preferably, an inner and outer circulation air door is arranged at an air inlet of the HVAC, and when the inner and outer circulation air door is positioned at the first position, the air inlet of the HVAC box body is communicated with the outside of the automobile; when the internal and external circulation air door is positioned at the second position, the air inlet of the HVAC box body is simultaneously communicated with the outside and the inside of the automobile; when the internal and external circulation air door is positioned at the third position, the air inlet of the HVAC box body is communicated with the interior of the vehicle.

Preferably, the outdoor ventilator is further provided with a variable intake grill, and a fan for ventilating the outdoor heat exchanger.

In the control method for the automobile heat pump air conditioner assembly disclosed by the invention, the three-way valve A is controlled to act in a refrigerating mode, the first branch pipe is communicated, and the second branch pipe is closed; controlling the three-way valve B to act, enabling the third branch pipe to be communicated, and closing the fourth branch pipe; under a heating mode, controlling the three-way valve A to act, closing the first branch pipe, and communicating the second branch pipe; and controlling the three-way valve B to act, closing the third branch pipe, and communicating the fourth branch pipe.

Preferably, the variable intake grille is opened in a cooling mode and the heating mode.

Preferably, the demisting device further comprises a demisting mode, wherein in the demisting mode, the three-way valve A is controlled to act so that the first branch pipe is closed, the second branch pipe is communicated, the three-way valve B is controlled to act so that the third branch pipe is communicated, and the fourth branch pipe is closed.

Preferably, in the dehumidification mode, the variable intake grille is open.

Preferably, the device further comprises a defrosting mode, wherein in the defrosting mode, the three-way valve A is controlled to act, the first branch pipe is communicated, and the second branch pipe is closed; controlling the three-way valve B to act, enabling the third branch pipe to be communicated, and closing the fourth branch pipe; when the heating mode is switched to the defrosting mode, the three-way valve B is controlled to act, the third branch pipe is communicated, the fourth branch pipe is closed, the three-way valve A is controlled to delay to act, the first branch pipe is communicated, and the second branch pipe is closed.

Preferably, in the defrosting mode, the variable intake grille and the fan are both turned off, the auxiliary heater is turned on, and the cold and warm air door is located at the third position.

Preferably, when the defrosting mode is switched to the heating mode, the three-way valve A is controlled to act, the first branch pipe is closed, the second branch pipe is communicated, the three-way valve B is controlled to delay to act, the third branch pipe is closed, and the fourth branch pipe is communicated.

Preferably, the variable grille is opened when switching from the defrosting mode to the heating mode.

The automobile disclosed by the invention comprises the automobile heat pump air conditioner assembly.

Preferably, the automobile is an electric automobile or a hybrid electric automobile.

According to the technical scheme, in the heat pump air conditioning system disclosed by the invention, one indoor heat exchanger comprises two indoor heat exchangers, one indoor heat exchanger is used for refrigerating, the other indoor heat exchanger is used for heating, the indoor heat exchanger is used as a heating heat exchanger, in the refrigerating state, refrigerant circulates in the refrigerating heat exchanger through the actions of the three-way valve A and the three-way valve B, when the refrigerating state is converted into the heating state, the refrigerant can be prevented from flowing into the refrigerating heat exchanger only through the actions of the three-way valve A and the three-way valve B, and the refrigerant firstly enters the heating heat exchanger after coming out of the compressor, so that the heating is realized, and when the refrigerating state is converted into the refrigerating state, the refrigerating state and the heating state are also only through the actions of the three-way valve A and the three-way valve B.

The heat pump air conditioning system of the automobile disclosed by the invention is adopted, so that the heat pump air conditioning assembly of the automobile has the corresponding advantages of the heat pump air conditioning system.

The automobile disclosed by the invention also has the corresponding advantages of the heat pump air conditioning system because the heat pump air conditioning assembly of the automobile is adopted.

According to the control method of the automobile heat pump air conditioner assembly, the three-way valve A and the three-way valve B of the air conditioner system are controlled, so that the quick switching of the refrigerating and heating states of the automobile heat pump air conditioner assembly can be realized, and the comfort of a user is improved.

Drawings

FIG. 1 is a schematic cycle diagram of a refrigeration mode (or defrost mode) system of an automotive heat pump air conditioning assembly as disclosed in a first embodiment of the present invention;

FIG. 2 is a schematic cycle diagram of a heating mode system of an automotive heat pump air conditioning assembly disclosed in a first embodiment of the present invention;

FIG. 3 is a schematic view of a demisting mode system of an automotive heat pump air conditioning assembly according to a first embodiment of the present invention;

fig. 4 is a schematic cycle diagram of a refrigeration mode (or defrost mode) system of an automotive heat pump air conditioning assembly as disclosed in a second embodiment of the present invention.

Wherein 10 is a heat pump air conditioning system, 11 is a compressor, 12 is a three-way valve A,13a is a heating heat exchanger, 13B is a refrigerating heat exchanger, 14 is a throttling device, 15 is a one-way valve, 16 is a flash generator, 17a is an outdoor heat exchanger, 17B is a variable air inlet grille, 17c is a fan, 18 is a gas-liquid separator, 19 is a three-way valve B,20 is an HVAC box, 21 is an internal and external circulation air door, 22 is a traction fan, 23 is a cooling and heating air door, and 24 is an auxiliary heater.

Detailed Description

One of the cores of the invention is to provide a heat pump air conditioning system so as to enable the refrigerating and heating modes of an air conditioner to be quickly switched, and improve the comfort of users.

The invention further provides an automobile heat pump air conditioner assembly formed by the heat pump air conditioner system.

The invention further provides a control method of the automobile heat pump air conditioner assembly.

The invention further provides an automobile adopting the automobile heat pump air conditioner assembly.

In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 3, the heat pump air conditioning system disclosed in the embodiment of the present invention includes a compressor 11, an indoor heat exchanger, and an outdoor heat exchanger 17a, and the indoor heat exchanger includes a refrigeration heat exchanger 13B and a heating heat exchanger 13a, where an exhaust port of the compressor 11 is communicated with a first manifold, the first manifold is branched into a first branch and a second branch by a three-way valve a, the first branch is communicated with a first port of the outdoor heat exchanger 17a, the second branch is communicated with a first port of the heating heat exchanger 13a, a heating heat exchanger branch led out from a second port of the heating heat exchanger 13a is communicated with the first branch, a second manifold led out from a second port of the outdoor heat exchanger 17a is branched into a third branch and a fourth branch by a three-way valve B, the third branch is communicated with a first port of the refrigeration heat exchanger 13B, and is combined to form a third manifold, the third manifold is communicated with a first port of the compressor 11, and the third manifold is correspondingly throttled to the first branch and the third branch is provided for heat exchange device 14 and the second heat exchanger.

The heat pump air conditioning system at least comprises the following operation modes:

referring to fig. 1, in the drawing of the present invention, a broken line in the heat pump system represents a cut-off of a pipeline, no refrigerant flows, a smooth representation of the pipeline is realized, a refrigerant flows in the pipeline, a solid arrow represents a refrigerant flowing direction, in the refrigeration mode, a three-way valve a acts to enable a first branch pipe to be communicated, a second branch pipe is closed, a refrigerant discharged from a compressor 11 enters an outdoor heat exchanger 17a to conduct condensation heat release, a three-way valve B acts to enable a third branch pipe to be communicated, a fourth branch pipe is closed, the refrigerant flowing out of the outdoor heat exchanger 17a enters a refrigeration heat exchanger 13B to conduct evaporation heat absorption after being throttled by a throttling device 14 on the third branch pipe, and the refrigerant after heat absorption is re-circulated into the compressor 11 through the refrigeration heat exchanger branch pipe and the third main pipe to complete the whole refrigeration cycle.

In the heating mode, referring to fig. 2, in the heating mode, the three-way valve a is operated to close the first branch pipe, the second branch pipe is communicated, the refrigerant discharged from the compressor 11 enters the heating heat exchanger 13a to perform condensation heat release, then the refrigerant enters the outdoor heat exchanger 17a through the branch pipe of the heating heat exchanger to perform evaporation heat release, the three-way valve B is operated to close the third branch pipe, the fourth branch pipe is communicated, and the refrigerant flowing out of the outdoor heat exchanger 17a flows back into the compressor 11 again through the third main pipe of the fourth branch pipe to complete the whole heating cycle.

In the demisting mode, referring to fig. 3, the three-way valve a is operated to close the first branch pipe, the second branch pipe is communicated, the refrigerant discharged from the compressor 11 enters the heating heat exchanger 13a to perform condensation heat release, then the refrigerant is subjected to primary throttling through the throttling device 14 arranged on the branch pipe of the heating heat exchanger, the refrigerant subjected to primary throttling enters the outdoor heat exchanger 17a to perform primary evaporation heat absorption, the three-way valve B is operated to communicate the third branch pipe, the fourth branch pipe is closed, the refrigerant subjected to primary evaporation heat absorption passes through the throttling device 14 arranged on the third branch pipe to perform secondary throttling, and the refrigerant subjected to secondary throttling enters the refrigerating heat exchanger 13B to perform secondary evaporation heat absorption. In this mode, the indoor side refrigeration heat exchanger 13b and the heating heat exchanger 13a both work, and the indoor air is cooled and dehumidified by the refrigeration heat exchanger 13b, and then heated and dried by the heating heat exchanger 13a to complete the dehumidification process.

In the defrosting mode, the three-way valve A acts to enable the first branch pipe to be communicated, the second branch pipe to be closed, the refrigerant discharged by the compressor 11 enters the outdoor heat exchanger 17a to conduct condensation and heat release, the three-way valve B acts to enable the third branch pipe to be communicated, the fourth branch pipe to be closed, the refrigerant flowing out of the outdoor heat exchanger 17a enters the refrigeration heat exchanger 13B to conduct evaporation and heat absorption after being throttled by the throttling device 14 on the third branch pipe, and the refrigerant after heat absorption is returned to the compressor 11 again through the refrigeration heat exchanger branch pipe and the third main pipe to complete the whole refrigeration cycle.

If the heating mode is converted into the defrosting mode, the throttling element on the third branch pipe is preferably opened to the corresponding opening degree, the three-way valve B acts, the third branch pipe is communicated, the fourth branch pipe is closed, the three-way valve A acts in a delayed mode, so that the first branch pipe is communicated with the second branch pipe to be closed, when the defrosting mode is finished and the heating mode is converted, the three-way valve A acts preferentially, the first branch pipe is closed, the second branch pipe is communicated, and the three-way valve B acts in a delayed mode, so that the third branch pipe is closed, and the fourth branch pipe is communicated.

In the heat pump air conditioning system disclosed by the invention, the indoor heat exchangers comprise two indoor heat exchangers, one of the indoor heat exchangers is responsible for refrigeration, the other indoor heat exchanger is called a refrigeration heat exchanger 13B, the other indoor heat exchanger is responsible for heating, the indoor heat exchanger is called a heating heat exchanger 13a, in the refrigeration state, the refrigerant in the refrigeration heat exchanger 13B circulates through the actions of the three-way valve A and the three-way valve B, when the refrigeration state is converted into the heating state, the refrigerant can be prevented from flowing into the refrigeration heat exchanger 13B only through the actions of the three-way valve A and the three-way valve B, and the refrigerant is firstly introduced into the heating heat exchanger 13a after coming out of the compressor 11, so that the heating is realized, and the refrigerating state is converted into the refrigeration state only through the actions of the three-way valve A and the three-way valve B.

In order to further optimize the technical scheme in the above embodiment, a flash evaporator 16 may be further connected in series to the branch pipe of the heating heat exchanger, the flash evaporator 16 is communicated with the air supply port of the compressor 11 through an air supply pipeline, the upstream end and the downstream end of the flash evaporator 16 are both provided with throttling elements, in the heating mode, the throttled refrigerant enters the flash evaporator 16, the flash gas returns to the air supply port of the compressor 11 to complete air supply, so as to achieve the effect of air supply and enthalpy increase, the compressor 11 may adopt the bipolar compressor 11, and the use of the bipolar compressor in cooperation with the flash evaporator 16 may greatly improve the heating capacity and expand the lower temperature limit of the heat pump air conditioner.

In order to avoid the backflow of the refrigerant after the conversion of the refrigerating and heating process, the branch pipes of the heating heat exchanger and the branch pipes of the refrigerating heat exchanger are respectively provided with a check valve 15, in order to avoid the backflow of the refrigerant in the air supplementing pipeline, the air supplementing pipeline is also provided with a check valve 15, as shown in fig. 1 to 3, in order to prevent the compressor 11 from generating liquid impact and ensure the working reliability of the compressor 11, a third main pipe is also connected with a gas-liquid separator 18 in series so as to separate the liquid refrigerant and avoid the liquid refrigerant from directly entering the compressor 11.

The embodiment of the invention also discloses an automobile heat pump air conditioner assembly assembled by the heat pump air conditioner system, which comprises an HVAC box (Heating, ventilation and Air Conditioning Heating ventilation and air conditioning box) besides the heat pump air conditioner system disclosed in the embodiment, wherein a traction fan 22 is arranged near an air inlet of the HVAC box 20, a refrigeration heat exchanger 13b and a Heating heat exchanger 13a are both arranged in the HVAC box 20, and air flows introduced by the traction fan 22 pass through the refrigeration heat exchanger 13b and the Heating heat exchanger 13a.

Fig. 1 to 3 are schematic structural views of an air conditioner assembly of an automobile heat pump in a first embodiment, wherein the hollow arrow in the drawing represents the flowing direction of air, the opening of an HVAC case 20 close to a traction fan 22 is an air inlet, an internal and external circulation air door 21 is arranged at the air inlet, the internal and external circulation air door 21 has three adjusting positions, and when the internal and external circulation air door 21 is positioned at the first position, the air inlet of the HVAC case 20 is communicated with the outside of the automobile to realize external circulation; when the internal and external circulation air door 21 is positioned at the second position, the air inlet of the HVAC box 20 is simultaneously communicated with the outside and the inside of the automobile, so that internal and external circulation is realized; when the internal and external circulation air door 21 is positioned at the third position, the air inlet of the HVAC box 20 is communicated with the interior of the vehicle to realize internal circulation, an auxiliary heater 24 is further arranged in the HVAC box 20, the auxiliary heater 24 is positioned on the leeward side of the indoor heat exchanger, the auxiliary heater 24 is also provided with a cold and warm air door 23, the cold and warm air door 23 also comprises three adjusting positions, and when the cold and warm air door 23 is positioned at the first position, air flow does not pass through the auxiliary heater 24; when the cold and warm air door 23 is at the second position, a part of the air flow passes through the auxiliary heater 24; when the damper 23 is in the third position, the air flow passes through the auxiliary heater 24 entirely, and in order to ensure that the intake air can pass through the cooling heat exchanger 13b before passing through the heating heat exchanger 13a during dehumidification, the cooling heat exchanger 13b is preferably disposed on the windward side, and the heating heat exchanger 13a is disposed on the leeward side, as shown in fig. 1 to 3.

Of course, in order to ensure sufficient heat exchange for the outdoor heat exchanger 17a in the heat pump air conditioner assembly of the automobile, it is also necessary to provide a variable intake grill 17b and a fan 17c for ventilating the outdoor heat exchanger 17a, and the ventilation area can be changed by deformation of the variable intake grill 17 b.

In the second embodiment of the present invention, as shown in fig. 4, compared with the first embodiment, the difference of the heat pump air conditioner assembly of the present embodiment is that the HVAC case 20, the HVAC case 20 of the present embodiment eliminates the cooling and heating damper 23 and the air duct thereof, so as to reduce the air intake resistance, and the heat pump air conditioner system of the present embodiment and the operation mode thereof are identical to those of the heat pump air conditioner system of the first embodiment.

In addition, the invention also discloses a control method of the automobile heat pump air conditioner assembly, which comprises the following steps: in the refrigeration mode, the three-way valve A is controlled to act, the first branch pipe is communicated, and the second branch pipe is closed; the three-way valve B is controlled to act, the third branch pipe is communicated, and the fourth branch pipe is closed; under a heating mode, the three-way valve A is controlled to act, the first branch pipe is closed, and the second branch pipe is communicated; and controlling the three-way valve B to act, closing the third branch pipe, communicating the fourth branch pipe, and controlling the three-way valve A and the three-way valve B to perform corresponding switching actions when the refrigerating and heating modes are switched.

In the cooling and heating modes, air is treated in the HVAC case 20, and is drawn into the air duct by the internal and external circulation air door 21 through the drawing fan 22, cooled by the cooling heat exchanger 13b or heated by the heating heat exchanger 13a, then selectively heated or unheated by the auxiliary heater 24 through the cooling and heating air door 23, and finally the treated comfortable air is sent to the blowing face air door, the foot blowing air door or the defogging air door according to the opening and closing conditions of different air openings of the HVAC. In the cooling mode, the variable intake grille 17b is turned on, the fan 17c may be turned on to provide forced air cooling heat exchange according to the vehicle speed, and the internal and external circulation damper 21 at the HVAC air intake may be selected to implement internal circulation, external circulation, or internal and external circulation according to logic determination or manual selection.

The control method also comprises a defogging mode, and in the defogging mode, the three-way valve A is controlled to act so as to close the first branch pipe, the second branch pipe is communicated, the three-way valve B is controlled to act so as to enable the third branch pipe to be communicated, and the fourth branch pipe is closed.

That is, the defogging mode controls the heat pump air conditioning system to operate in a defogging (dehumidifying) mode in which air is treated in the HVAC case 20, the air is drawn into the duct through the internal and external circulation damper 21 by the drawing fan 22, cooled and dehumidified through the refrigeration heat exchanger 13b, then heated and dried through the heating heat exchanger 13a, then optionally heated or unheated through the auxiliary heater 24 through the cooling and heating damper 23, and finally the treated comfort air is sent to the defogging damper. In the defogging mode, the variable intake grille 17b is turned on, the fan 17c can be turned on according to the vehicle speed to provide forced air cooling heat exchange, and the internal and external circulation damper 21 at the HVAC air inlet can be used for internal circulation, external circulation or internal and external circulation according to logic judgment or manual selection.

In the control method, the control system also comprises a defrosting mode, and in the defrosting mode, the three-way valve A is controlled to act, the first branch pipe is communicated, and the second branch pipe is closed; and controlling the three-way valve B to act and enabling the third branch pipe to be communicated, wherein the fourth branch pipe is closed, namely controlling the heat pump air conditioning system to operate in a defrosting mode.

When the heating mode is switched to the defrosting mode, the three-way valve B is controlled to act, the third branch pipe is communicated, the fourth branch pipe is closed, the three-way valve A is controlled to delay to act, the first branch pipe is communicated, and the second branch pipe is closed.

When the defrosting mode is switched to the heating mode, the three-way valve A is controlled to act, the first branch pipe is closed, the second branch pipe is communicated, the three-way valve B is controlled to delay to act, the third branch pipe is closed, and the fourth branch pipe is communicated.

In the defrosting mode, the variable air inlet grille 17b and the fan 17c are both closed, the auxiliary heater 24 is turned on, and the cold and hot air door 23 is positioned at the third position to ensure that heat can be continuously supplied to the interior of the vehicle in the defrosting process, after the defrosting mode is changed into the conventional heating mode, the variable grille is turned on, the fan 17c is turned on or off according to the vehicle speed, and meanwhile, the auxiliary heater 24 can be directly turned off at one time, or the heating power is gradually reduced until heating is stopped along with the conventional heating.

The embodiment of the invention also discloses an automobile, which comprises the automobile heat pump air conditioner assembly, and the automobile heat pump air conditioner assembly is the heat pump air conditioner assembly disclosed in any embodiment.

Because the heat pump air conditioner assembly is adopted, the automobile has the corresponding advantages of the heat pump air conditioner assembly of the automobile, and the details are not repeated herein.

It should be noted that the above-mentioned vehicles include, but are not limited to, electric vehicles and hybrid electric vehicles.

The automobile, the heat pump air conditioning system, the automobile heat pump air conditioning assembly and the control method thereof provided by the invention are described in detail. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims

1. The control method of the automobile heat pump air conditioner assembly is characterized by being applied to a heat pump air conditioner system, and comprising a compressor (11), an indoor heat exchanger and an outdoor heat exchanger (17 a), wherein the indoor heat exchanger comprises a refrigeration heat exchanger (13B) and a heating heat exchanger (13 a), an exhaust port of the compressor (11) is communicated with a first main pipe, the first main pipe is branched into a first branch pipe and a second branch pipe by a three-way valve A (12), the first branch pipe is communicated with a first port of the outdoor heat exchanger (17 a), the second branch pipe is communicated with a first port of the heating heat exchanger (13 a), a heating heat exchanger branch pipe led out from a second port of the heating heat exchanger (13 a) is communicated with the first branch pipe, a second main pipe led out from a second port of the outdoor heat exchanger (17 a) is branched into a third branch pipe and a fourth branch pipe by a three-way valve B (19), the third branch pipe is communicated with a third port of the heat exchanger (13B), and the third branch pipe is led out from a third port of the refrigerating heat exchanger (13B) is communicated with the third port of the refrigerating heat exchanger (14 a), and the third heat exchanger is led out from a third port of the refrigerating heat exchanger (14 a), and the third heat exchanger is communicated with the third port of the refrigerating heat exchanger (14B);

in a refrigeration mode, controlling the three-way valve A (12) to act, and enabling the first branch pipe to be communicated and the second branch pipe to be closed; controlling the three-way valve B (19) to act, enabling the third branch pipe to be communicated, and enabling the fourth branch pipe to be closed; under a heating mode, the three-way valve A (12) is controlled to act, the first branch pipe is closed, and the second branch pipe is communicated; controlling the three-way valve B (19) to act, closing the third branch pipe, and communicating the fourth branch pipe;

the device also comprises a defrosting mode, wherein the action of the three-way valve A (12) is controlled and the first branch pipe is communicated, and the second branch pipe is closed during the defrosting mode; controlling the three-way valve B (19) to act, enabling the third branch pipe to be communicated, and enabling the fourth branch pipe to be closed; when the heating mode is switched to the defrosting mode, the three-way valve B (19) is controlled to act, the third branch pipe is communicated, the fourth branch pipe is closed, the three-way valve A (12) is controlled to delay to act, the first branch pipe is communicated, and the second branch pipe is closed.

2. The control method of an automotive heat pump air conditioner assembly according to claim 1, wherein a flash generator (16) is further connected in series to the branch pipe of the heating heat exchanger, and the flash generator (16) is communicated with the air supply port of the compressor (11) through an air supply pipeline.

3. A control method of an automotive heat pump air conditioning assembly according to claim 2, characterized in that two said throttle devices (14) are provided on the branch pipes of the heating heat exchanger, and that the two said throttle devices (14) are located at the upstream and downstream ends of the flash evaporator (16), respectively.

4. The control method of an automotive heat pump air conditioner assembly according to claim 2, characterized in that the air supply pipe is further provided with a check valve (15).

5. The control method of the automobile heat pump air conditioner assembly according to claim 1, wherein the branch pipe of the heating heat exchanger is further connected with a check valve (15) in series.

6. The control method of an automotive heat pump air conditioner assembly according to claim 1, wherein the branch pipe of the refrigeration heat exchanger is further connected in series with a check valve (15).

7. The control method of an automotive heat pump air conditioner assembly according to claim 1, wherein the third manifold is further connected in series with a gas-liquid separator (18).

8. The control method of an automotive heat pump air conditioning assembly according to any of claims 1 to 7, further comprising an HVAC case (20), a traction fan (22) being provided near an air intake of the HVAC case (20), the refrigeration heat exchanger (13 b) and the heating heat exchanger (13 a) being both located within the HVAC case (20), and an air flow introduced by the traction fan (22) passing through the refrigeration heat exchanger (13 b) and the heating heat exchanger (13 a).

9. The control method of an automotive heat pump air conditioner assembly according to claim 8, characterized in that the refrigeration heat exchanger (13 b) is located on a windward side, and the heating heat exchanger (13 a) is located on a leeward side.

10. The method of controlling an automotive heat pump air conditioning assembly of claim 9, further comprising an auxiliary heater (24) disposed within the HVAC case (20).

11. The control method of an automotive heat pump air conditioner assembly according to claim 10, further comprising a cold and warm air door (23), wherein when the cold and warm air door (23) is in the first position, the air flow does not pass through the auxiliary heater (24) at all; when the cold and warm air door (23) is positioned at the second position, a part of air flow passes through the auxiliary heater (24); when the cold and warm air door (23) is positioned at the third position, the air flow completely passes through the auxiliary heater (24).

12. The control method of an automotive heat pump air conditioner assembly according to claim 11, wherein an internal and external circulation air door (21) is arranged at an air inlet of the HVAC, and when the internal and external circulation air door (21) is located at the first position, the air inlet of the HVAC case (20) is communicated with the outside of the vehicle; when the internal and external circulation air door (21) is positioned at the second position, the air inlet of the HVAC box body (20) is simultaneously communicated with the outside and the inside of the automobile; when the internal and external circulation air door (21) is positioned at the third position, an air inlet of the HVAC box body (20) is communicated with the interior of the vehicle.

13. A control method of an automotive heat pump air conditioning assembly according to claim 12, characterized in that the outdoor heat exchanger (17 a) is further provided with a variable air intake grille (17 b) in position, and a fan (17 c) for ventilating the outdoor heat exchanger (17 a).

14. A control method of an automotive heat pump air conditioning assembly according to claim 13, characterized in that the variable intake grille (17 b) is opened in a cooling mode and in the heating mode.

15. The control method of an automotive heat pump air conditioner assembly according to claim 13, further comprising a defogging mode in which the three-way valve a (12) is controlled to be operated to close the first branch pipe, the second branch pipe is controlled to be communicated, the three-way valve B (19) is controlled to be operated to communicate the third branch pipe, and the fourth branch pipe is controlled to be closed.

16. A control method of an automotive heat pump air conditioning assembly according to claim 15, characterized in that in the defogging mode the variable intake grille (17 b) is opened.

17. A control method of an automotive heat pump air conditioning assembly according to claim 13, characterized in that in the defrosting mode, both the variable intake grille (17 b) and the fan (17 c) are closed, the auxiliary heater (24) is turned on, and the damper (23) is located at the third position.

18. The control method of an automotive heat pump air conditioner assembly according to claim 13, characterized by controlling the three-way valve a (12) to act and the first branch pipe to close, controlling the three-way valve B (19) to delay the action and the third branch pipe to close and the fourth branch pipe to communicate when the defrosting mode is changed to the heating mode.

19. A control method of an automotive heat pump air conditioning assembly as recited in claim 18 in which the variable intake grille is opened upon transition from the defrost mode to the heating mode.

20. A vehicle comprising a control method of a vehicle heat pump air conditioning assembly, characterized in that the control method of the vehicle heat pump air conditioning assembly is a control method of a vehicle heat pump air conditioning assembly according to any one of claims 1 to 19.

21. The vehicle of claim 20, wherein the vehicle is an electric vehicle or a hybrid electric vehicle.