CN116238284A - Heat pump air conditioning system - Google Patents

Abstract

The invention relates to the technical field of heat management systems, in particular to a heat pump air conditioning system. In the heat pump air conditioning system, a first heat exchanger comprises a first interface and a second interface, a second heat exchanger comprises a third interface and a fourth interface, and a third heat exchanger comprises a first communication port and a second communication port; the reversing component is communicated with the outflow end of the power source component and is respectively connected with the first communication port, the second interface and the third interface; the second interface is communicated with the inflow end of the power source assembly through a first pipeline, a first valve is arranged on the first pipeline, the third interface is communicated with the inflow end of the power source assembly through a second pipeline, and a second valve is arranged on the second pipeline; the first interface is communicated with the second communication port, and the fourth interface is communicated with the first communication port; one end of the parallel pipeline is communicated with the first interface, and the other end of the parallel pipeline is communicated with the fourth interface; the second communication port is communicated with the inflow end of the power source assembly through a first branch pipe, and a third valve is arranged on the first branch pipe.

Description

Heat pump air conditioning system

Technical Field

The invention relates to the technical field of heat management systems, in particular to a heat pump air conditioning system.

Background

The heat pump air conditioning system is an important component of the new energy automobile, and greatly influences the endurance mileage of the new energy automobile and the use comfort of passengers. The air conditioning box of the existing heat pump air conditioning system is generally of a two-core structure, namely an indoor evaporator and an indoor condenser, the indoor evaporator is utilized to refrigerate a passenger cabin in a high-temperature environment, the indoor condenser is idle, the indoor condenser is utilized to heat the passenger cabin in a low-temperature environment, and the indoor evaporator is idle. Because the indoor space of the energy automobile is limited, the heat exchange area of the existing heat pump air conditioning system is limited, and the heat exchange effect of the heat pump air conditioning system is poor.

Disclosure of Invention

The invention aims to provide a heat pump air conditioning system so as to solve the technical problem of poor heat exchange of the heat pump air conditioning system in the prior art to a certain extent.

The invention provides a heat pump air conditioning system, comprising: the power source assembly, the reversing assembly, the first heat exchanger, the second heat exchanger, the third heat exchanger and the parallel pipeline; the first heat exchanger comprises a first interface and a second interface, the second heat exchanger comprises a third interface and a fourth interface, and the third heat exchanger comprises a first communication port and a second communication port; the reversing component is communicated with the outflow end of the power source component, and is respectively connected with the first communication port, the second interface and the third interface so as to communicate the power source component with the first communication port or communicate the power source component with the second interface and the third interface; the second interface is communicated with the inflow end of the power source assembly through a first pipeline, a first valve is arranged on the first pipeline, the third interface is communicated with the inflow end of the power source assembly through a second pipeline, and a second valve is arranged on the second pipeline; the first interface is communicated with the second communication port through a third pipeline, and the fourth interface is communicated with the first communication port through a fourth pipeline; one end of the parallel pipeline is communicated with the first interface, and the other end of the parallel pipeline is communicated with the fourth interface; the second communication port is communicated with the inflow end of the power source assembly through a first branch pipe, and a third valve is arranged on the first branch pipe.

When refrigeration is needed, the reversing component communicates the outflow end of the power source component with the first communication port of the third heat exchanger, and the communication pipeline between the power source component and the second and third interfaces is cut off; the first valve and the second valve may both be opened (i.e. both the first line and the second line are open) and the third valve closed (i.e. the first branch line is closed): the medium flows out of the third heat exchanger from the power source assembly, part of the medium flows out of the third heat exchanger, enters the first heat exchanger from the first interface for heat exchange, enters the first pipeline from the second interface, and flows back to the power source assembly. The other part of medium enters the fourth interface through the parallel pipeline and then enters the second heat exchanger for heat exchange, the medium after heat exchange flows into the second pipeline through the third interface and then flows back to the power source assembly, the parallel connection of the first heat exchanger and the second heat exchanger is realized, at the moment, the two heat exchangers work, the refrigeration intensity is high, and the refrigeration efficiency is high. Of course, the second valve can be selectively closed, so that the second pipeline is closed, and the medium only passes through the first heat exchanger to exchange heat, and at the moment, the first heat exchanger is used as an evaporator, so that the general refrigeration can be realized.

In the heat pump air conditioning system provided by the invention, at least the first heat exchanger and the second heat exchanger can be connected in parallel in the refrigeration process, and can be used as evaporators, so that the heat exchange area can be increased, the heat exchange efficiency can be improved, and the heat exchange effect can be improved on the premise of not increasing the number of the evaporators.

Further, the second pipeline is communicated with the reversing assembly, and the first pipeline is communicated with the second pipeline; the second valve is located between the communication point of the second pipeline and the reversing assembly and the communication point of the first pipeline and the second pipeline, and the first valve is located between the communication point of the first pipeline and the second pipeline and the communication point of the first pipeline and the inflow end of the power source assembly.

When heating is needed, the reversing component is used for communicating the outflow end of the power source component with the second pipeline, the second valve is opened, the first valve is closed, at the moment, the outflow end of the power source component is communicated with the second interface and the third interface, and the third valve is opened: the medium flowing out from the outflow end of the power source assembly enters the second pipeline, and a part of the medium enters the second heat exchanger from the third interface and flows out from the fourth interface after heat exchange; the other part of medium enters the first pipeline after passing through the second valve, then enters the first heat exchanger through the second port for heat exchange, then flows out through the first port, then enters the parallel pipeline 7, the part of medium and the medium flowing out through the fourth port are combined and flow to the first communication port, the medium enters the third heat exchanger for heat exchange, then flows out through the second communication port, flows to the first branch pipe, and flows back to the power source assembly through the first branch pipe. At this time, the two heat exchangers work, the heating intensity is high, and the heating efficiency is high. The second valve can be selectively closed, the communication between the outflow end of the power source assembly and the second interface is cut off, and at the moment, the medium enters the second heat exchanger for heat exchange, but not the first heat exchanger for heat exchange, so that general heating is realized.

The first heat exchanger and the second heat exchanger can be used as the evaporator and the condenser at the same time, and the heat exchange area is increased, the heat exchange efficiency is improved and the heat exchange effect is improved on the premise that the number of the evaporators and the condensers is not increased; the heat pump air conditioning system can also realize the selection of heating intensity, can exchange heat by both the first heat exchanger and the second heat exchanger and can exchange heat by the second heat exchanger, and can simplify the pipeline structure of the heat pump air conditioning system.

Further, a first one-way valve is arranged on the parallel pipeline, and the first one-way valve prevents fluid from flowing from the fourth interface side to the first interface side.

Further, the heat pump air conditioning system further comprises a fourth heat exchanger; the fourth heat exchanger is connected to the first branch pipe.

Further, the reversing assembly and the parallel pipeline are both communicated with the fourth pipeline; the second check valve is connected to the fourth pipeline and is located between the communication point of the reversing assembly and the fourth pipeline and the communication point of the parallel pipeline and the fourth pipeline.

Further, a fourth valve is further arranged on the fourth pipeline; the first branch pipe and the parallel pipeline are communicated with the third pipeline; and a fifth valve is arranged on the third pipeline.

Further, the heat pump air conditioning system further comprises a second branch pipe, one end of the second branch pipe is communicated with the outflow end of the power source assembly, the other end of the second branch pipe is communicated with the inflow end of the power source assembly, and a sixth valve is arranged on the second branch pipe.

Further, the reversing component is a three-way electromagnetic valve.

Further, the heat pump air conditioning system further comprises a third branch pipe and a fourth branch pipe; the third branch pipe is communicated between the outflow end of the power source assembly and the second pipeline, and the fourth branch pipe is communicated between the outflow end of the power source assembly and the fourth pipeline; the reversing assembly comprises a first parallel electromagnetic valve arranged on the third branch pipe and a second parallel electromagnetic valve arranged on the fourth branch pipe.

Further, the second heat exchanger further comprises a fifth interface, and the heat pump air conditioning system further comprises a fifth branch pipe, wherein the fifth branch pipe is communicated between the second pipeline and the fifth interface; the second pipeline is positioned between the communication point of the second pipeline and the fifth branch pipe and the third interface, a seventh valve is arranged on the second pipeline, and an eighth valve is arranged on the fifth branch pipe.

It is to be understood that both the foregoing general description and the following detailed description are for purposes of example and explanation and are not necessarily limiting of the disclosure. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the subject matter of the present disclosure. Meanwhile, the description and drawings are used to explain the principles of the present disclosure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a heat pump air conditioning system according to a first embodiment of the present invention;

fig. 2 is a schematic diagram of a heat pump air conditioning system according to a second embodiment of the present invention;

FIG. 3 is a diagram illustrating operation of the heat pump air conditioning system of FIG. 2 in a cooling mode or a cooling dual temperature zone mode;

FIG. 4 is a diagram illustrating operation of the heat pump air conditioning system of FIG. 2 in a cooling mode and a heating element forced cooling mode;

FIG. 5 is an operational view of the heat pump air conditioning system shown in FIG. 2 in a heating element forced cooling mode;

FIG. 6 is an operational view of the heat pump air conditioning system of FIG. 2 in a heating mode;

FIG. 7 is a diagram illustrating operation of the heat pump air conditioning system of FIG. 2 in a compressor self-heating mode;

fig. 8 is an operation diagram of the heat pump air conditioning system shown in fig. 2 in a dehumidification mode.

Icon: 1-a compressor; 2-a gas-liquid separator; 3-a third heat exchanger; 301-a first communication port; 302-a second communication port; 4-a first heat exchanger; 401-a first interface; 402-a second interface; 5-a second heat exchanger; 501-a third interface; 502-fourth interface; 503-fifth interface; 6-a fourth heat exchanger; 7-parallel pipes; 8-a first pipeline; 9-a second pipeline; 10-a first branch pipe; 11-a third pipeline; 12-a fourth pipeline; 13-a first one-way valve; 14-a second one-way valve; 15-a second branch; 16-a third branch; 17-a fourth branch; 18-a fifth branch pipe; 19-a first parallel solenoid valve; 20-a second parallel solenoid valve; 21-a third parallel solenoid valve; 22-a fourth parallel solenoid valve; 23-a first parallel electronic expansion valve; 24-a second parallel electronic expansion valve; 25-a third parallel electronic expansion valve; 26-fourth parallel electronic expansion valve; 27-a fifth parallel electronic expansion valve; 28-sixth parallel electronic expansion valve; 29-blower.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown.

The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," "fifth," "sixth," "seventh," "eighth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

It should be noted that, in the embodiment of the present invention, the third heat exchanger 3 mainly exchanges heat with outdoor air, the first heat exchanger 4 and the second heat exchanger 5 mainly exchange heat with air sucked by the blower 29, and the fourth heat exchanger 6 mainly exchanges heat with cooling medium.

As shown in fig. 1 to 8, the present invention provides a heat pump air conditioning system, comprising a power source assembly, a reversing assembly, a first heat exchanger 4, a second heat exchanger 5, a third heat exchanger 3 and a parallel pipeline 7; the first heat exchanger 4 comprises a first interface 401 and a second interface 402, the second heat exchanger 5 comprises a third interface 501 and a fourth interface 502, and the third heat exchanger 3 comprises a first communication port 301 and a second communication port 302; the reversing component is communicated with the outflow end of the power source component (namely, the side of the medium flowing out of the power source component), and is respectively connected with the first communication port 301, the second interface 402 and the third interface 501 so as to communicate the power source component with the first communication port 301 or communicate the power source component with the second interface 402 and the third interface 501; the second interface 402 is communicated with the inflow end of the power source assembly (i.e. the side from which the medium flows into the power source assembly) through the first pipeline 8, the first pipeline 8 is provided with a first valve, the third interface 501 is communicated with the inflow end of the power source assembly through the second pipeline 9, and the second pipeline 9 is provided with a second valve; the first interface 401 is communicated with the second communication port 302 through the third pipeline 11, and the fourth interface 502 is communicated with the first communication port 301 through the fourth pipeline 12; one end of the parallel pipeline 7 is communicated with the first interface 401, and the other end is communicated with the fourth interface 502; the second communication port 302 communicates with the inflow end of the power source module through the first branch pipe 10, and a third valve is provided on the first branch pipe 10.

In this embodiment, when refrigeration is required, the reversing component communicates the outflow end of the power source component with the first communication port 301 of the third heat exchanger 3, and cuts off the communication pipeline between the power source component and the second interface 402 and the third interface 501; it is possible to have both the first valve and the second valve open (i.e. both the first conduit 8 and the second conduit 9 open) and to close the third valve (i.e. to close the first branch 10): the medium flows out of the third heat exchanger 3 from the power source assembly, part of the medium flowing out of the third heat exchanger 3 enters the first heat exchanger 4 from the first interface 401 to exchange heat, and the medium after heat exchange enters the first pipeline 8 from the second interface 402 and then flows back to the power source assembly. The other part of medium enters the fourth interface 502 through the parallel pipeline 7 and then enters the second heat exchanger 5 for heat exchange, the medium after heat exchange flows into the second pipeline 9 through the third interface 501 and then flows back to the power source assembly, the parallel connection of the first heat exchanger 4 and the second heat exchanger 5 is realized, at the moment, the two heat exchangers work, the refrigeration intensity is high, and the refrigeration efficiency is high. Of course, the second valve can be selectively closed, so that the second pipeline 9 is closed, and the medium only passes through the first heat exchanger 4 to exchange heat, and at this time, the first heat exchanger 4 is used as an evaporator, so that general refrigeration can be realized.

In the heat pump air conditioning system provided by the embodiment, at least the first heat exchanger 4 and the second heat exchanger 5 can be connected in parallel in the refrigeration process, and can be used as evaporators, so that the heat exchange area can be increased, the heat exchange efficiency can be improved, and the heat exchange effect can be improved on the premise that the number of the evaporators is not increased.

Wherein, can set up mutually independent pipeline and realize that the switching-over subassembly is connected with first interface 401 and second interface 402 respectively, first pipeline 8 and second pipeline 9 mutually independent, and at this moment, when needs heat, the switching-over subassembly communicates the outflow end of power supply subassembly with second interface 402 and third interface 501 respectively, and first valve is closed, and second valve and third valve are all opened, by the medium of the outflow of power supply subassembly's outflow: a part of medium enters the second heat exchanger 5 through the third interface 501 for heat exchange and flows out through the fourth interface 502; the other part of medium flows out from the first interface 401 after entering the first heat exchanger 4 from the second interface 402 for heat exchange, then enters the parallel pipeline 7, the part of medium and the medium flowing out from the fourth interface 502 are combined and flow to the first communication port 301, the medium flows out from the second communication port 302 after entering the third heat exchanger 3 for heat exchange, and flows to the first branch pipe 10, and flows back to the power source assembly from the first branch pipe 10. At this time, both heat exchangers work as condensers, and the heating intensity and the heating efficiency are high.

In the heat pump air conditioning system provided by the embodiment, the first heat exchanger 4 and the second heat exchanger 5 can be used as condensers and evaporators, and on the premise of not increasing the number of the evaporators and the condensers, the heat exchange area is increased, the heat exchange efficiency is improved, and the heat exchange effect is improved.

As an alternative, as shown in fig. 1 to 8, the second pipe 9 communicates with the reversing assembly, and the first pipe 8 communicates with the second pipe 9 (i.e., the second pipe 9 communicates with the inflow end of the power source assembly through the first pipe 8, and the first pipe 8 communicates with the reversing assembly through the second pipe 9); the second valve is located between the communication point of the second pipeline 9 and the reversing assembly and the communication point of the first pipeline 8 and the second pipeline 9, and the first valve is located between the communication point of the first pipeline 8 and the second pipeline 9 and the communication point of the first pipeline 8 and the inflow end of the power source assembly.

In this embodiment, the refrigeration process is the same as the above process, and will not be described again. The second interface 402 is communicated with the reversing assembly through the first pipeline 8 and the second pipeline 9, the third interface 501 is communicated with the inflow end of the power source assembly through the second pipeline 9 and the first pipeline 8, and other pipelines can be avoided, so that the pipeline structure of the heat pump air conditioning system is simple. When heating is needed, the reversing component communicates the outflow end of the power source component with the second pipeline 9, the second valve is opened, the first valve is closed, at the moment, the outflow end of the power source component is communicated with the second interface 402 and the third interface 501, and the third valve is opened: the medium flowing out from the outflow end of the power source assembly enters the second pipeline 9, and a part of the medium enters the second heat exchanger 5 from the third interface 501 for heat exchange and flows out from the fourth interface 502; the other part of medium enters the first pipeline 8 after passing through the second valve, then enters the first heat exchanger 4 through the second interface 402, flows out through the first interface 401 after exchanging heat, then enters the parallel pipeline 7, the part of medium and the medium flowing out through the fourth interface 502 are combined and flow to the first communication port 301, the medium enters the third heat exchanger 3, flows out through the second communication port 302 after exchanging heat, flows to the first branch pipe 10, and flows back to the power source assembly through the first branch pipe 10. At this time, the two heat exchangers work, the heating intensity is high, and the heating efficiency is high. Of course, the second valve can be selectively closed, and the communication between the outflow end of the power source assembly and the second interface 402 is cut off, at this time, the medium enters the second heat exchanger 5 to exchange heat, but not the first heat exchanger 4 to exchange heat, so that general heating is realized.

The heat pump air conditioning system provided by the embodiment can realize that the first heat exchanger 4 and the second heat exchanger 5 are used as the evaporator and the condenser at the same time, and on the premise of not increasing the number of the evaporator and the condenser, the heat exchange area is increased, the heat exchange efficiency is improved, and the heat exchange effect is improved; the heating intensity can be selected, the first heat exchanger 4 and the second heat exchanger 5 can exchange heat, and the pipeline structure of the heat pump air conditioning system can be simplified.

Elements for detecting the pressure and temperature of the medium may also be provided in the heat pump air conditioning system.

As shown in fig. 1 to 8, on the basis of the above embodiment, further, the parallel pipeline 7 is provided with a first check valve 13, and the first check valve 13 prevents fluid from flowing from the fourth interface 502 side to the first interface 401 side, so that medium backflow is avoided, and the control effect of fluid flow direction is ensured.

As shown in fig. 1 to 8, further, the heat pump air conditioning system further includes a fourth heat exchanger 6, and the fourth heat exchanger 6 is connected to the first branch pipe 10. Specifically, the third valve is connected to the first branch pipe 10 and is located between the fourth heat exchanger 6 and the communication point of the third pipe 11 and the first branch pipe 10.

In the present embodiment, the fourth heat exchanger 6 is provided to cool a heat generating component (for example, a battery or a generator) on a vehicle or to recover waste heat of the heat generating component for heating.

As shown in fig. 1 to 8, further, on the basis of the above embodiment, both the reversing assembly and the parallel conduit 7 are in communication with a fourth conduit 12; the fourth pipeline 12 is connected with a second one-way valve 14, the second one-way valve 14 is positioned between the communication point of the reversing assembly and the fourth pipeline 12 and the communication point of the parallel pipeline 7 and the fourth pipeline 12, and the second one-way valve 14 prevents medium from flowing from the communication point of the reversing assembly and the fourth pipeline 12 to the direction of the communication point of the parallel pipeline 7 and the fourth pipeline 12 and the direction of the second heat exchanger 5.

As shown in fig. 1 to 8, further, on the basis of the above embodiment, a fourth valve is further provided on the fourth pipeline 12; the first branch pipe 10 and the parallel pipeline 7 are communicated with a third pipeline 11; the third pipeline 11 is provided with a fifth valve. The heat pump air conditioning system is advantageously used in a more operational mode, as will be described in more detail in the following specific examples.

As shown in fig. 1 to 8, based on the above embodiment, the heat pump air conditioning system further includes a second branch pipe 15, one end of the second branch pipe 15 is communicated with the outflow end of the power source assembly, the other end is communicated with the inflow end of the power source assembly, and a sixth valve is provided on the second branch pipe 15, which is beneficial to realizing more operation modes of the heat pump air conditioning system, and is specifically described in the following specific examples.

As an alternative, the reversing component may be a three-way electromagnetic valve, and the integrated electromagnetic valve is adopted to make the pipeline structure of the heat pump air conditioning system simple.

As an alternative, the heat pump air conditioning system further comprises a third branch pipe 16 and a fourth branch pipe 17; the third branch pipe 16 is communicated between the outflow end of the power source assembly and the second pipeline 9, and the fourth branch pipe 17 is communicated between the outflow end of the power source assembly and the fourth pipeline 12; the reversing assembly comprises a first parallel solenoid valve 19 arranged on the third branch 16 and a second parallel solenoid valve 20 arranged on the fourth branch 17. In this embodiment, when the outflow end of the power source assembly needs to be communicated with the third heat exchanger 3, the second parallel electromagnetic valve 20 is opened, and the first parallel electromagnetic valve 19 is closed; when it is desired to connect the outlet of the power source module to the second line 9, the second parallel solenoid valve 20 is closed and the first parallel solenoid valve 19 is opened. The electromagnetic valve is adopted to realize reversing control, so that the cost of the reversing assembly is low.

As shown in fig. 2 to 8, further, based on the above embodiment, the second heat exchanger 5 further includes a fifth interface 503, and the heat pump air conditioning system further includes a fifth branch pipe 18, where the fifth branch pipe 18 is communicated between the second pipeline 9 and the fifth interface 503; a seventh valve is arranged between the third joint 501 and the communication point between the second pipeline 9 and the fifth branch pipe 18, and an eighth valve is arranged on the fifth branch pipe 18.

In this embodiment, the flow rate of the first medium entering the second heat exchanger 5 can be controlled through the seventh valve and the eighth valve, so that the function of dual temperature areas can be realized, the temperature air door is avoided, and the production cost is reduced.

The first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, etc. may be any of electric valves.

Specifically, in some embodiments of the present invention, the first valve and the second valve may function as open and shut, alternatively the first valve is the third parallel solenoid valve 21 and the second valve is the fourth parallel solenoid valve 22; the third, fourth, fifth, sixth, seventh and eighth valves may function to regulate the flow, and preferably all use parallel electronic expansion valves, that is, the first, second, third, fourth, fifth and sixth parallel electronic expansion valves 23, 24, 25, 26, 27 and 28, respectively.

Specifically, the power source assembly comprises a compressor 1 and a gas-liquid separator 2, wherein the inlet end of the gas-liquid separator 2 is the inflow end of the power source assembly, the outlet end of the compressor 1 is the outflow end of the power source assembly, and the outlet end of the gas-liquid separator 2 is communicated with the inlet end of the compressor 1. The gas-liquid separator 2 can be a sleeve type or a U-shaped tube type, has an unlimited structure, mainly plays roles in separating liquid refrigerant from gaseous refrigerant, storing liquid, returning oil, drying, filtering and the like, and can prevent the oil shortage and wet compression of the compressor 1.

Specifically, a blower 29 is provided at one side of the first heat exchanger 4 so that air at the first heat exchanger 4 and the second heat exchanger 5 can be blown into the passenger compartment.

The following description will specifically explain the operation of the heat pump air conditioning system in different operation modes by using an embodiment (as shown in fig. 2) in which the reversing assembly includes the first parallel solenoid valve 19 and the second parallel solenoid valve 20 and includes technical features of other embodiments:

as shown in fig. 3, the cooling mode of the heat pump air conditioning system:

the first parallel solenoid valve 19 is closed, and the second parallel solenoid valve 20, the third parallel solenoid valve 21 and the fourth parallel solenoid valve 22 are opened; the first parallel electronic expansion valve 23 and the fourth parallel electronic expansion valve 26 are both closed, the second parallel electronic expansion valve 24, the third parallel electronic expansion valve 25, the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 are both open, and the blower 29 is open. The high-temperature and high-pressure refrigerant discharged by the compressor 1 flows into the third heat exchanger 3 through the second parallel electromagnetic valve 20 and the second parallel electronic expansion valve 24, at the moment, the second parallel electronic expansion valve 24 is fully opened, the refrigerant is throttled and branched into two paths through the third parallel electronic expansion valve after being condensed and released in the third heat exchanger 3, and one path flows into the first heat exchanger 4 through the first interface 401 to absorb air heat and then flows out of the second interface 402; the other path flows into the second heat exchanger 5 from the fourth interface 502 through the first check valve 13 to absorb air heat, and then flows out of the third interface 501 and the fifth interface 503 respectively, and flows into the third parallel electromagnetic valve 21 together with the refrigerant flowing out of the second interface 402 through the fifth parallel electronic expansion valve 27, the sixth parallel electronic expansion valve 28 and the fourth parallel electromagnetic valve 22, and then enters the gas-liquid separator 2, wherein the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 are all fully opened. The refrigerant is gas-liquid separated and dried in the gas-liquid separator 2 and then flows into the compressor 1, thereby completing the refrigerant refrigeration mode cycle. The air sucked by the blower 29 sequentially passes through the first heat exchanger 4, and the second heat exchanger 5 exchanges heat and then blows into the passenger cabin, so that the passenger cabin is refrigerated.

When the refrigeration mode is operated, the fourth parallel electromagnetic valve 22, the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 are closed, that is, the refrigerant is controlled not to flow in the second heat exchanger 5 to exchange heat with air, and other flow modes of the refrigerant are the same as the flow process, and are not described herein.

When the dual-temperature-zone refrigeration mode is operated, the opening degree of the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 is regulated, one of the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 is opened, or the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 are opened, but the opening degree is different, namely, the flow rate of the refrigerant flowing out of two cores of the second heat exchanger 5 is controlled to control the heat exchange amount of the refrigerant and the air, and the flow processes of other flow modes of the refrigerant in the high-temperature refrigeration mode are consistent, and are not repeated here.

As shown in fig. 4, the cooling mode and the heating element forced cooling mode of the heat pump air conditioning system:

in the cooling mode, when the heat generating component exceeds its own safety requirement temperature, the heat generating component needs to be cooled. The first parallel solenoid valve 19 is closed, and the second parallel solenoid valve 20, the third parallel solenoid valve 21 and the fourth parallel solenoid valve 22 are all open; the fourth parallel electronic expansion valve 26 is closed, and the first parallel electronic expansion valve 23, the second parallel electronic expansion valve 24, the third parallel electronic expansion valve 25, the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 are all opened; the blower 29 is turned on. The high-temperature and high-pressure refrigerant discharged by the compressor 1 flows into the third heat exchanger 3 through the second parallel electromagnetic valve 20 and the second parallel electronic expansion valve 24, at the moment, the second parallel electronic expansion valve 24 is fully opened, the refrigerant is cooled and released in the third heat exchanger 3, then branches into two paths, one path of the refrigerant is throttled by the first parallel electronic expansion valve 23 and flows into the fourth heat exchanger 6, at the moment, the refrigerant is evaporated and absorbed in the fourth heat exchanger 6, and then flows out into the gas-liquid separator 2; the other path of the refrigerant flows into the third parallel electronic expansion valve 25 to be throttled, the throttled refrigerant is branched into two paths again, one path of the refrigerant flows into the first heat exchanger 4 through the first interface 401 to absorb air heat and then flows out of the second interface 402, the other path of the refrigerant flows into the second heat exchanger 5 through the first check valve 13 from the fourth interface 502 to continuously absorb air heat, the other path of the refrigerant flows out of the third interface 501 and the fifth interface 503 respectively and passes through the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28, and then flows into the third parallel electromagnetic valve 21 and the gas-liquid separator 2 together through the fourth parallel electromagnetic valve 22 and the refrigerant flowing out of the second interface 402, and at the moment, the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 can be fully opened. The refrigerant is gas-liquid separated and dried in the gas-liquid separator 2, and then flows into the compressor 1, thereby completing the circulation of the refrigerant in the cooling mode and the forced cooling mode of the heat generating components. The air sucked into the environment by the blower 29 sequentially passes through the first heat exchanger 4, and the second heat exchanger 5 exchanges heat and then is blown into the passenger cabin, so that the passenger cabin is refrigerated.

As shown in fig. 5, the heat generating component forced cooling mode of the heat pump air conditioning system:

the passenger cabin has no refrigeration requirement, and when the temperature of the heating component exceeds the safety requirement temperature of the passenger cabin, the heating component needs to be refrigerated. At this time, the second parallel solenoid valve 20 may be opened, and the first parallel solenoid valve 19, the third parallel solenoid valve 21, and the fourth parallel solenoid valve 22 may be closed; the third parallel electronic expansion valve 25, the fourth parallel electronic expansion valve 26, the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 are all closed, the first parallel electronic expansion valve 23 and the second parallel electronic expansion valve 24 are all open, and the blower 29 is closed. The high-temperature and high-pressure refrigerant discharged by the compressor 1 flows into the third heat exchanger 3 after passing through the second parallel electromagnetic valve 20 and the second parallel electronic expansion valve 24, at the moment, the second parallel electronic expansion valve 24 is fully opened, the refrigerant is throttled and flows into the fourth heat exchanger 6 through the first parallel electronic expansion valve 23 after being condensed and released heat in the third heat exchanger 3, at the moment, the refrigerant evaporates and absorbs heat in the fourth heat exchanger 6, then flows out into the gas-liquid separator 2, and the refrigerant flows into the compressor 1 after being subjected to gas-liquid separation and drying in the gas-liquid separator 2, so that the forced cooling mode circulation of the heating component is completed.

As shown in fig. 6, the heating mode of the heat pump air conditioning system:

the first parallel electromagnetic valve 19 and the fourth parallel electromagnetic valve 22 are opened, the second parallel electromagnetic valve 20 and the third parallel electromagnetic valve 21 are closed, the third parallel electronic expansion valve 25 and the fourth parallel electronic expansion valve 26 are closed, and the first parallel electronic expansion valve 23, the second parallel electronic expansion valve 24, the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 are opened; the blower 29 is turned on. The high-temperature and high-pressure refrigerant discharged by the compressor 1 is branched into two paths after passing through the first parallel electromagnetic valve 19, one path of the high-temperature and high-pressure refrigerant respectively passes through the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 and then flows into the second heat exchanger 5 through the corresponding third interface 501 and fifth interface 503 to be condensed and released, the flow can be regulated by the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28, the two paths are heated in a single temperature zone of the passenger cabin when the two paths are fully opened, and the two paths are heated in a double temperature zone of the passenger cabin when the two paths are controlled and regulated to perform flow distribution; the other path of the refrigerant flows into the first heat exchanger 4 through the second interface 402 after passing through the fourth parallel electromagnetic valve 22 to condense and release heat, the refrigerant flows out through the first interface 401 after releasing heat, then flows into the second one-way valve 14 together with the refrigerant flowing out through the fourth interface 502 after passing through the first one-way valve 13, then flows through the second parallel electronic expansion valve 24 to throttle, the refrigerant sequentially flows into the first parallel electronic expansion valve 23 after evaporating and absorbing heat in the third heat exchanger 3, the fourth heat exchanger 6 and the gas-liquid separator 2, at the moment, the first parallel electronic expansion valve 23 is fully opened, no cooling liquid flows in the fourth heat exchanger 6, the refrigerant does not exchange heat in the fourth heat exchanger 6, and the fourth heat exchanger 6 is equivalent to a connecting channel. The refrigerant is subjected to gas-liquid separation and drying in the gas-liquid separator 2, and then flows into the compressor 1, so that the refrigerant heating mode circulation is completed. The air sucked into the environment by the blower 29 sequentially passes through the first heat exchanger 4, and the second heat exchanger 5 exchanges heat and then is blown into the passenger cabin, so that the passenger cabin is heated.

In the heating passenger cabin mode, if the waste heat of the heating component can be recycled, the refrigerant evaporates and absorbs heat from the third heat exchanger 3 and then sequentially flows into the first parallel electronic expansion valve 23 and the fourth heat exchanger 6, at the moment, the first parallel electronic expansion valve 23 throttles, and the refrigerant in the fourth heat exchanger 6 exchanges heat with the waste heat to absorb the waste heat and then flows out to the gas-liquid separator 2 and the compressor 1 to complete the waste heat recovery mode of the heating component.

When the heating mode is operated, the fourth parallel electromagnetic valve 22 may be closed, that is, the refrigerant is controlled not to flow into the first heat exchanger 4 to exchange heat with air, and the refrigerant flows out from the exhaust port of the compressor 1, passes through the first parallel electromagnetic valve 19, then passes through the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28, and directly flows into the second heat exchanger 5 through the corresponding third interface 501 and fifth interface 503, and other flow modes are the same as the above flow process, which is not repeated here.

As shown in fig. 7, the compressor 1 of the heat pump air conditioning system is self-heating and heating mode:

in a lower temperature environment, when an automobile is started in a cold mode and a passenger cabin heats, the whole automobile heat pump air conditioning system is switched to a self-heating passenger cabin heating mode of the compressor 1, and gaseous refrigerant at the outlet of the compressor 1 causes the inlet of the gas-liquid separator 2 to increase the air suction density, so that the heating capacity of the heat pump air conditioning system is improved.

At this time, the first parallel solenoid valve 19 and the fourth parallel solenoid valve 22 may be both opened, and the second parallel solenoid valve 20 and the third parallel solenoid valve 21 may be both closed; the third parallel electronic expansion valve 25 is closed, and the first parallel electronic expansion valve 23, the second parallel electronic expansion valve 24, the fourth parallel electronic expansion valve 26, the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 are all opened; the blower 29 is turned on. The high-temperature and high-pressure refrigerant discharged by the compressor 1 is branched into two paths, and one path flows into the gas-liquid separator 2 through the fourth parallel electronic expansion valve 26; the other path flows into the first parallel electromagnetic valve 19, the refrigerant flows out of the first parallel electromagnetic valve 19 and then branches into two paths, one path respectively flows into the second heat exchanger 5 through the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 and then flows into the second heat exchanger 5 through the corresponding third interface 501 and fifth interface 503 for condensation heat release, the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 can both perform flow regulation, the two paths are fully opened for heating a single temperature zone of the passenger cabin, and the two paths perform flow distribution through control regulation for heating a double temperature zone of the passenger cabin; the other path of the refrigerant flows into the first heat exchanger 4 through the second interface 402 after passing through the fourth parallel electromagnetic valve 22, condenses and releases heat, the refrigerant flows out through the first interface 401 after releasing heat, then flows into the second one-way valve 14 together with the refrigerant flowing out of the fourth interface 502 after flowing through the first one-way valve 13, then flows out to the first parallel electronic expansion valve 23 directly without heat exchange in the third heat exchanger 3 through the second parallel electronic expansion valve 24 and the third heat exchanger 3, and then enters the fourth heat exchanger 6 and the gas-liquid separator 2, at the moment, the first parallel electronic expansion valve 23 is fully opened, no cooling liquid flows in the fourth heat exchanger 6, the refrigerant does not exchange heat in the fourth heat exchanger 6, and the loop is equivalent to a connecting channel. The refrigerant is subjected to gas-liquid separation and drying in the gas-liquid separator 2 and then flows into the air suction port of the compressor 1, so that the self-heating passenger cabin mode circulation of the compressor 1 is completed. The air sucked into the environment by the blower 29 sequentially passes through the first heat exchanger 4, and the second heat exchanger 5 exchanges heat and then is blown into the passenger cabin, so that the passenger cabin is heated.

As shown in fig. 8, dehumidification mode of the heat pump air conditioning system:

when the humidity in the passenger compartment is too high, it is necessary to dehumidify the passenger compartment. The second parallel solenoid valve 20 and the fourth parallel solenoid valve 22 may both be closed, and the first parallel solenoid valve 19 and the third parallel solenoid valve 21 may both be opened; the first parallel electronic expansion valve 23 and the fourth parallel electronic expansion valve 26 are both closed, the second parallel electronic expansion valve 24, the third parallel electronic expansion valve 25, the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 are both open, and the blower 29 is open. The high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the second heat exchanger 5 through the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 respectively after passing through the first parallel electromagnetic valve 19, flows into the third heat exchanger 3 through the fourth interface 502 after being condensed and released in the second heat exchanger 5, flows into the third heat exchanger 3 through the second one-way valve 14 and the second parallel electronic expansion valve 24, and then flows into the first heat exchanger 4 through the third parallel electromagnetic valve 21 and the gas-liquid separator 2 in sequence after the refrigerant flows into the third heat exchanger 3 through the fourth interface 502 after passing through the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 respectively, and then flows into the first heat exchanger 4 through the third parallel electronic expansion valve 25 through the first interface 401, so that the air temperature is reduced, the air humidity is discharged through the second interface 402, and the refrigerant can be condensed and released in the third heat exchanger 3 and can be vaporized, and the heat can be absorbed according to the ambient temperature and the opening degree of the second parallel electronic expansion valve 24 is controlled. The air blower 29 cools and dehumidifies the wet air sucked from the passenger compartment through the first heat exchanger 4, and then absorbs heat and heats up through the second heat exchanger 5 to maintain the comfort of the passenger compartment, and the wet air circulates in this way to dehumidify the passenger compartment.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention. In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments.

Claims (10)

1. A heat pump air conditioning system, comprising: the device comprises a power source assembly, a reversing assembly, a first heat exchanger (4), a second heat exchanger (5), a third heat exchanger (3) and a parallel pipeline (7); the first heat exchanger (4) comprises a first interface (401) and a second interface (402), the second heat exchanger (5) comprises a third interface (501) and a fourth interface (502), and the third heat exchanger (3) comprises a first communication port (301) and a second communication port (302);

the reversing component is communicated with the outflow end of the power source component, and is respectively connected with the first communication port (301), the second interface (402) and the third interface (501) so as to communicate the power source component with the first communication port (301) or communicate the power source component with the second interface (402) and the third interface (501);

the second interface (402) is communicated with the inflow end of the power source assembly through a first pipeline (8), a first valve is arranged on the first pipeline (8), the third interface (501) is communicated with the inflow end of the power source assembly through a second pipeline (9), and a second valve is arranged on the second pipeline (9);

the first interface (401) is communicated with the second communication port (302) through a third pipeline (11), and the fourth interface (502) is communicated with the first communication port (301) through a fourth pipeline (12); one end of the parallel pipeline (7) is communicated with the first interface (401), and the other end of the parallel pipeline is communicated with the fourth interface (502);

the second communication port (302) is communicated with the inflow end of the power source assembly through a first branch pipe (10), and a third valve is arranged on the first branch pipe (10).

2. The heat pump air conditioning system according to claim 1, characterized in that the second conduit (9) communicates with the reversing assembly, the first conduit (8) communicating with the second conduit (9); the second valve is located between the communication point of the second pipeline (9) and the reversing assembly and the communication point of the first pipeline (8) and the second pipeline (9), and the first valve is located between the communication point of the first pipeline (8) and the second pipeline (9) and the communication point of the first pipeline (8) and the inflow end of the power source assembly.

3. The heat pump air conditioning system according to claim 2, characterized in that a first one-way valve (13) is provided on the parallel conduit (7), the first one-way valve (13) preventing fluid from flowing from the fourth interface (502) side to the first interface (401) side.

4. The heat pump air conditioning system according to claim 2, further comprising a fourth heat exchanger (6); the fourth heat exchanger is connected to the first branch pipe (10).

5. Heat pump air conditioning system according to claim 2, characterized in that the reversing assembly and the parallel duct (7) are both in communication with the fourth duct (12); the fourth pipeline (12) is connected with a second one-way valve (14), and the second one-way valve (14) is positioned between a communication point of the reversing assembly and the fourth pipeline (12) and a communication point of the parallel pipeline (7) and the fourth pipeline (12).

6. The heat pump air conditioning system according to claim 5, characterized in that a fourth valve is further provided on the fourth pipe (12); the first branch pipe (10) and the parallel pipeline (7) are communicated with the third pipeline (11); and a fifth valve is arranged on the third pipeline (11).

7. The heat pump air conditioning system according to claim 2, further comprising a second branch pipe (15), wherein one end of the second branch pipe (15) is communicated with the outflow end of the power source assembly, the other end is communicated with the inflow end of the power source assembly, and a sixth valve is arranged on the second branch pipe (15).

8. The heat pump air conditioning system of claim 2, wherein the reversing assembly is a three-way solenoid valve.

9. The heat pump air conditioning system according to claim 2, further comprising a third branch pipe (16) and a fourth branch pipe (17); the third branch pipe (16) is communicated between the outflow end of the power source assembly and the second pipeline (9), and the fourth branch pipe (17) is communicated between the outflow end of the power source assembly and the fourth pipeline (12); the reversing assembly comprises a first parallel electromagnetic valve (19) arranged on the third branch pipe (16) and a second parallel electromagnetic valve (20) arranged on the fourth branch pipe (17).

10. The heat pump air conditioning system according to any of claims 1-9, characterized in that the second heat exchanger (5) further comprises a fifth interface (503), the heat pump air conditioning system further comprising a fifth branch pipe (18), the fifth branch pipe (18) being in communication between the second pipe (9) and the fifth interface (503); the second pipeline (9) is provided with a seventh valve between the communication point of the second pipeline (9) and the fifth branch pipe (18) and the third interface (501), and the fifth branch pipe (18) is provided with an eighth valve.

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