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 technique

The heat pump air-conditioning system is an important part of new energy vehicles, which greatly affects the mileage of new energy vehicles and the comfort of passengers. The air-conditioning box of the existing heat pump air-conditioning system generally has a two-core structure, that is, it includes an indoor evaporator and an indoor condenser. The indoor condenser is used for heating the passenger compartment, and the indoor evaporator is idle. Due to the limited indoor space of energy vehicles, 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 not good.

Contents of the invention

The purpose of the present invention is to provide a heat pump air-conditioning system to solve the technical problem of poor heat exchange existing in the prior art to a certain extent.

The present invention provides a heat pump air-conditioning system, comprising: a power source assembly, a reversing assembly, a first heat exchanger, a second heat exchanger, a third heat exchanger and parallel pipes; the first heat exchanger includes a first An interface and a second interface, the second heat exchanger includes a third interface and a fourth interface, the third heat exchanger includes a first communication port and a second communication port; the reversing assembly and the power The outflow end of the source assembly communicates, and the reversing assembly is respectively connected to the first communication port, the second interface and the third interface, so as to communicate the power source assembly with the first communication port or connect the power source assembly to the first communication port. The source assembly communicates with the second interface and the third interface respectively; the second interface communicates with the inflow end of the power source assembly through a first pipeline, and the first pipeline is provided with a first valve, The third interface communicates 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 communicates with the second communication port through a third pipeline The fourth port communicates with the first port through the fourth pipeline; one end of the parallel pipeline communicates with the first port, and the other end communicates with the fourth port; the second port communicates The port communicates 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 required, the reversing assembly communicates the outflow end of the power source assembly with the first communication port of the third heat exchanger, and cuts off the communication pipeline between the power source assembly and the second interface and the third interface; the first valve can be and the second valve are both open (that is, the first pipeline and the second pipeline are both open), and the third valve is closed (that is, the first branch pipe is closed): the medium flows out from the power source assembly into the third heat exchanger, and flows out In the medium of the third heat exchanger, a part of the medium enters the first heat exchanger through the first interface for heat exchange, and the heat-exchanged medium enters the first pipeline through the second interface, and then flows back to the power source assembly. The other part of the medium enters the fourth interface through the parallel pipeline, and then enters the second heat exchanger for heat exchange. The heat-exchanged medium flows into the second pipeline through the third interface, and then flows back to the power source assembly, realizing the first heat exchange The parallel connection of the heat exchanger and the second heat exchanger, at this time, both heat exchangers work, the cooling intensity is high, and the cooling efficiency is high. Of course, the second valve can be selectively closed, thereby closing the second pipeline, so that the medium only passes through the first heat exchanger for heat exchange. At this time, the first heat exchanger is used as an evaporator to realize general refrigeration.

In the heat pump air-conditioning system provided by the present invention, at least the parallel connection of the first heat exchanger and the second heat exchanger can be realized during the refrigeration process, both of which can be used as evaporators, and the number of evaporators can be increased without increasing the number of evaporators. Heat exchange area, improve heat exchange efficiency, improve heat exchange effect.

Further, the second pipeline communicates with the reversing assembly, the first pipeline communicates with the second pipeline; the second valve is located between the second pipeline and the reversing assembly Between the connection point of the first pipeline and the connection point of the second pipeline, the first valve is located at the connection point of the first pipeline and the second pipeline and the first Between the connection point of the pipeline and the inflow end of the power source assembly.

When heating is required, the reversing assembly connects the outflow end of the power source assembly with the second pipeline, opens the second valve, and closes the first valve. At this time, the outflow end of the power source assembly is connected to the second interface and the third interface. Connected, open the third valve: the medium flowing out from the outflow end of the power source assembly enters the second pipeline, part of the medium enters the second heat exchanger through the third interface and flows out through the fourth interface after exchanging heat; the other part of the medium passes through the second heat exchanger After the second valve, it enters the first pipeline, then enters the first heat exchanger through the second interface and flows out through the first interface, and then enters the parallel pipeline 7. This part of the medium merges with the medium flowing out of the fourth interface and flows to the first The medium enters the third heat exchanger for heat exchange and flows out through the second communication port, and flows to the first branch pipe, and then flows back to the power source assembly through the first branch pipe. At this time, both heat exchangers are working, with high heating intensity and high heating efficiency. Of course, the second valve can be selectively closed to cut off the communication between the outflow end of the power source component and the second interface. At this time, the medium enters the second heat exchanger for heat exchange instead of entering the first heat exchanger to achieve general Heating.

The first heat exchanger and the second heat exchanger can be used as evaporator and condenser at the same time, without increasing the number of evaporators and condensers, the heat exchange area can be increased, the heat exchange efficiency can be improved, and the heat exchange effect can be improved ; It can also realize the selection of heating intensity, both the first heat exchanger and the second heat exchanger can exchange heat, and the second heat exchanger can also exchange heat, and the pipeline structure of the heat pump air-conditioning system can be simplified.

Further, the parallel pipeline is provided with a first one-way valve, 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 includes a fourth heat exchanger; the fourth heat exchanger is connected to the first branch pipe.

Further, both the reversing assembly and the parallel pipeline are in communication with the fourth pipeline; a second one-way valve is connected to the fourth pipeline, and the second one-way valve is located in the reversing assembly. Between the communication point with the fourth pipeline and the communication point between the parallel pipeline and the fourth pipeline.

Further, a fourth valve is provided on the fourth pipeline; both the first branch pipe and the parallel pipeline are connected to the third pipeline; a fifth valve is provided on the third pipeline.

Further, the heat pump air-conditioning system further includes a second branch pipe, one end of the second branch pipe communicates with the outflow end of the power source assembly, and the other end communicates with the inflow end of the power source assembly, and the second branch pipe There is a sixth valve on it.

Further, the reversing assembly is a three-way solenoid valve.

Further, the heat pump air-conditioning system further includes a third branch pipe and a fourth branch pipe; the third branch pipe communicates between the outflow end of the power source assembly and the second pipeline, and the fourth branch pipe communicates with the Between the outflow end of the power source assembly and the fourth pipeline; the reversing assembly includes a first parallel solenoid valve set on the third branch pipe and a second parallel solenoid valve set on the fourth branch pipe Parallel solenoid valves.

Further, the second heat exchanger also includes a fifth interface, and the heat pump air-conditioning system further includes a fifth branch pipe, and the fifth branch pipe communicates between the second pipeline and the fifth interface; On the second pipeline, a seventh valve is provided between the connection point between the second pipeline and the fifth branch pipe and the third interface, and an eighth valve is provided 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 illustration and description and are not necessarily restrictive of the disclosure. The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate subject matter of the present disclosure. Meanwhile, the specification and drawings serve to explain the principles of the present disclosure.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

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

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

Fig. 3 is an operation diagram of the heat pump air-conditioning system shown in Fig. 2 in the cooling mode or in the cooling dual temperature zone mode;

FIG. 4 is an operation diagram of the heat pump air-conditioning system shown in FIG. 2 in the cooling mode and the forced cooling mode of the heat-generating components;

FIG. 5 is an operation diagram of the heat pump air-conditioning system shown in FIG. 2 in the forced cooling mode of the heat-generating components;

FIG. 6 is an operation diagram of the heat pump air-conditioning system shown in FIG. 2 in the heating mode;

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

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

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

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present invention, but not all of them.

The components of the embodiments of the invention generally described and shown in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh", and "eighth" are used for descriptive purposes only and do not Read as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

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

As shown in Figures 1 to 8, the present invention provides a heat pump air conditioning system, including a power source assembly, a reversing assembly, a first heat exchanger 4, a second heat exchanger 5, a third heat exchanger 3 and parallel pipes 7. The first heat exchanger 4 includes a first interface 401 and a second interface 402, the second heat exchanger 5 includes a third interface 501 and a fourth interface 502, and the third heat exchanger 3 includes a first communication port 301 and a second interface. Two communication ports 302; the reversing assembly is communicated with the outflow end of the power source assembly (that is, the side where the medium flows out of the power source assembly), and the reversing assembly is respectively connected to the first communication port 301, the second interface 402 and the third interface 501 Connect to connect the power source assembly with the first communication port 301 or communicate the power source assembly with the second interface 402 and the third interface 501 respectively; the second interface 402 is connected to the inflow end ( That is, the side where the medium flows into the power source assembly and flows out) communicates, the first pipeline 8 is provided with a first valve, the third interface 501 communicates with the inflow end of the power source assembly through the second pipeline 9, and the second pipeline 9 There is a second valve on the top; the first interface 401 communicates with the second communication port 302 through the third pipeline 11, and the fourth interface 502 communicates with the first communication port 301 through the fourth pipeline 12; one end of the parallel pipeline 7 communicates with the second communication port 302. One port 401 communicates, and the other end communicates with the fourth port 502; the second communicating port 302 communicates with the inflow end of the power source assembly through the first branch pipe 10, and the first branch pipe 10 is provided with a third valve.

In this embodiment, when cooling is required, the reversing assembly communicates the outflow end of the power source assembly with the first communication port 301 of the third heat exchanger 3, and cuts off the connection between the power source assembly and the second interface 402 and the third interface 501. Connected pipelines; the first valve and the second valve can be opened (that is, the first pipeline 8 and the second pipeline 9 are all opened), and the third valve is closed (that is, the first branch pipe 10 is closed): the medium is driven by power The source assembly flows out into the third heat exchanger 3, and in the medium flowing out of the third heat exchanger 3, a part of the medium enters the first heat exchanger 4 through the first interface 401 for heat exchange, and the heat-exchanged medium is transferred from the second The interface 402 enters the first pipeline 8 and then flows back to the power source assembly. The other part of the medium enters the fourth interface 502 from 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 from the third interface 501, and then flows back to the power source assembly to realize The parallel connection of the first heat exchanger 4 and the second heat exchanger 5 is achieved. At this time, both heat exchangers work, and the cooling intensity and cooling efficiency are high. Of course, the second valve can be selectively closed, thereby closing the second pipeline 9, so that the medium only passes through the first heat exchanger 4 for heat exchange. At this time, the first heat exchanger 4 is used as an evaporator, which can realize general refrigeration. .

In the heat pump air-conditioning system provided in this embodiment, at least the parallel connection of the first heat exchanger 4 and the second heat exchanger 5 can be realized during the cooling process, both of which can be used as evaporators without increasing the number of evaporators , Increase the heat transfer area, increase the heat transfer efficiency, and improve the heat transfer effect.

Among them, mutually independent pipelines can be set to realize the connection between the reversing components and the first interface 401 and the second interface 402 respectively, and the first pipeline 8 and the second pipeline 9 are independent of each other. At this time, when heating is required, The reversing assembly connects the outflow end of the power source assembly with the second interface 402 and the third interface 501 respectively, the first valve is closed, the second valve and the third valve are both open, and the medium flowing out of the outflow end of the power source assembly: a part The medium enters the second heat exchanger 5 through the third interface 501 for heat exchange and flows out through the fourth interface 502; another part of the medium enters the first heat exchanger 4 through the second interface 402 for heat exchange, then flows out through the first interface 401, and then enters the Parallel pipeline 7, this part of the medium merges with the medium flowing out of the fourth interface 502 and flows to the first communication port 301, the medium enters the third heat exchanger 3 after heat exchange, flows out from the second communication port 302, and flows to the first branch pipe 10, It flows back to the power source assembly through the first branch pipe 10 . At this time, both heat exchangers work as condensers, with high heating intensity and high heating efficiency.

In the heat pump air conditioning system provided in this embodiment, the first heat exchanger 4 and the second heat exchanger 5 can be used as both condensers and evaporators, without increasing the number of evaporators and condensers , Increase the heat transfer area, increase the heat transfer efficiency, and improve the heat transfer effect.

As an alternative, as shown in Figures 1 to 8, the second pipeline 9 communicates with the reversing assembly, and the first pipeline 8 communicates with the second pipeline 9 (that is, the second pipeline 9 passes through the first A pipeline 8 communicates with the inflow end of the power source assembly, and the first pipeline 8 communicates with the reversing assembly through the second pipeline 9); the second valve is located at the communication point between the second pipeline 9 and the reversing assembly and the first Between the communication point of the pipeline 8 and the second pipeline 9, the first valve is located between the communication point of the first pipeline 8 and the second pipeline 9 and between 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 repeated here. The second interface 402 communicates with the reversing assembly through the first pipeline 8 and the second pipeline 9, and the third interface 501 communicates with the inflow end of the power source assembly through the second pipeline 9 and the first pipeline 8, Other pipelines can be avoided, so that the pipeline structure of the heat pump air-conditioning system is simple. When heating is required, the reversing assembly connects the outflow end of the power source assembly with the second pipeline 9, opens the second valve, and closes the first valve. At this time, the outflow end of the power source assembly is connected to the second interface 402 and the third The interfaces 501 are all connected, 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 through the third interface 501 for heat exchange and then passes through the fourth interface 502 Outflow; another part of the medium enters the first pipeline 8 after passing through the second valve, then enters the first heat exchanger 4 through the second interface 402 for heat exchange, flows out through the first interface 401, and then enters the parallel pipeline 7. The medium flowing out of the fourth interface 502 converges and flows to the first communication port 301. After the medium enters the third heat exchanger 3 for heat exchange, it flows out from the second communication port 302 and flows to the first branch pipe 10, and then flows back to the power plant through the first branch pipe 10. source component. At this time, both heat exchangers are working, with high heating intensity and high heating efficiency. Of course, the second valve can be selectively closed to cut off the connection between the outflow end of the power source assembly and the second interface 402. At this time, the medium enters the second heat exchanger 5 for heat exchange instead of entering the first heat exchanger 4 for heat exchange. , to achieve general heating.

The heat pump air conditioning system provided in this embodiment can realize that the first heat exchanger 4 and the second heat exchanger 5 can be used as evaporators and condensers at the same time, and the heat exchange area can be increased without increasing the number of evaporators and condensers , improve heat exchange efficiency, improve heat exchange effect; can also realize the selection of heating intensity, both the first heat exchanger 4 and the second heat exchanger 5 can exchange heat, or the second heat exchanger 5 can exchange heat, and , can simplify the piping structure of the heat pump air conditioning system.

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

As shown in Figures 1 to 8, on the basis of the above embodiments, further, the parallel pipeline 7 is provided with a first one-way valve 13, and the first one-way valve 13 prevents fluid from flowing from the fourth interface 502 side to the first On the side of the interface 401, the reverse flow of the medium is avoided, and the control effect of the fluid flow is ensured.

As shown in FIGS. 1 to 8 , on the basis of the above embodiments, the heat pump air-conditioning system further includes a fourth heat exchanger 6 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 connection point between the third pipeline 11 and the first branch pipe 10 .

In this embodiment, the installation of the fourth heat exchanger 6 can realize cooling of the heat-generating components (for example: battery or generator, etc.) on the vehicle, or recover the waste heat of the heat-generating components for heating.

As shown in Figures 1 to 8, on the basis of the above-mentioned embodiments, further, both the reversing assembly and the parallel pipeline 7 are communicated with the fourth pipeline 12; the fourth pipeline 12 is connected with a second one-way valve 14 , the second one-way valve 14 is located between the connection point between the reversing assembly and the fourth pipeline 12 and the connection point between the parallel pipeline 7 and the fourth pipeline 12, and the second one-way valve 14 prevents the medium from passing through the reversing assembly and the first pipeline. The connection point of the four pipelines 12 communicates in the direction of the connection point between the parallel pipeline 7 and the fourth pipeline 12 and in the direction of the second heat exchanger 5 .

As shown in Figures 1 to 8, on the basis of the above embodiments, further, a fourth valve is also provided on the fourth pipeline 12; the first branch pipe 10 and the parallel pipeline 7 are all communicated with the third pipeline 11; A fifth valve is provided on the third pipeline 11 . It is beneficial for the heat pump air-conditioning system to realize more working modes, and the specific application will be described in detail in the specific examples below.

As shown in Figures 1 to 8, on the basis of the above embodiments, the heat pump air-conditioning system further includes a second branch pipe 15, one end of the second branch pipe 15 communicates with the outflow end of the power source assembly, and the other end communicates with the power source assembly. The inflow end of the component is connected, and the second branch pipe 15 is provided with a sixth valve. This setting is beneficial for the heat pump air-conditioning system to achieve more working modes. The specific application will be described in detail in the following specific examples.

As an optional solution, the reversing component can be a three-way solenoid valve, and the use of an integrated solenoid valve can make the pipeline structure of the heat pump air-conditioning system simple.

As an optional solution, the heat pump air-conditioning system also includes a third branch pipe 16 and a fourth branch pipe 17; the third branch pipe 16 communicates between the outflow end of the power source assembly and the second pipeline 9, and the fourth branch pipe 17 communicates with the power source assembly. Between the outflow end of the source assembly and the fourth pipeline 12 ; the reversing assembly includes a first parallel solenoid valve 19 arranged on the third branch pipe 16 and a second parallel solenoid valve 20 arranged on the fourth branch pipe 17 . In this embodiment, when it is necessary to communicate the outflow end of the power source assembly with the third heat exchanger 3, open the second parallel solenoid valve 20 and close the first parallel solenoid valve 19; when it is necessary to connect the outflow end of the power source assembly with the When the second pipeline 9 is connected, the second parallel solenoid valve 20 is closed, and the first parallel solenoid valve 19 is opened. The use of the electromagnetic valve to realize the reversing control can reduce the cost of the reversing component.

As shown in Figures 2 to 8, on the basis of the above embodiments, further, 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, which communicates with the second Between the second pipeline 9 and the fifth interface 503 ; between the connection point of the second pipeline 9 and the fifth branch pipe 18 and the third interface 501 is provided with a seventh valve, and the fifth branch pipe 18 is provided with an eighth valve.

In this embodiment, the flow of the first medium into the second heat exchanger 5 can be controlled by the seventh valve and the eighth valve, so that the function of dual temperature zones can be realized, the temperature damper can be avoided, and the production cost can be reduced.

The first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve and the eighth valve can all use electric valves or the like.

Specifically, in some embodiments of the present invention, the first valve and the second valve can play the role of breaking, optionally, the first valve is the third parallel solenoid valve 21, and the second valve is the fourth parallel solenoid valve 21. Valve 22; the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve and the eighth valve can play the role of regulating the flow rate, and preferably all use parallel electronic expansion valves, that is, respectively the first parallel Electronic expansion valve 23 , second parallel electronic expansion valve 24 , third parallel electronic expansion valve 25 , fourth parallel electronic expansion valve 26 , fifth parallel electronic expansion valve 27 and sixth parallel electronic expansion valve 28 .

Specifically, the power source assembly includes a compressor 1 and a gas-liquid separator 2, 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 gas-liquid separator The outlet port of 2 communicates with the inlet port of compressor 1. The gas-liquid separator 2 can be a casing type or a U-shaped tube type, and the structure is not limited. It mainly plays the roles of separating liquid refrigerant and gas refrigerant, storing liquid, returning oil, drying, filtering, etc., and can prevent compression Machine 1 lacks oil and wet compression.

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

The working process of the heat pump air-conditioning system in different working modes will be specifically described below with the reversing assembly including the first parallel solenoid valve 19 and the second parallel solenoid valve 20, and an embodiment (as shown in FIG. 2 ) including the technical features of other embodiments:

As shown in Figure 3, the cooling mode of the heat pump air conditioning system:

The first parallel solenoid valve 19 is closed, 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, and the second The 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 turned on, and the blower 29 is turned on. The high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the third heat exchanger 3 through the second parallel solenoid valve 20 and the second parallel electronic expansion valve 24. After condensing and dissipating heat in the device 3, the throttling branch of the third parallel electronic expansion valve branches into two paths, one path flows into the first heat exchanger 4 through the first interface 401 to absorb air heat, and then flows out from the second interface 402; the other path passes through After the first one-way valve 13 flows into the second heat exchanger 5 from the fourth port 502 to absorb the heat of the air, it flows out from the third port 501 and the fifth port 503 respectively, and passes through the fifth parallel electronic expansion valve 27 and the sixth The parallel electronic expansion valve 28 and the fourth parallel solenoid valve 22 merge with the refrigerant flowing out of the second port 402 to flow into the third parallel solenoid valve 21 and then enter the gas-liquid separator 2. At this time, the fifth parallel electronic expansion valve 27 and the fourth parallel All six parallel electronic expansion valves 28 are fully opened. The refrigerant flows into the compressor 1 after undergoing gas-liquid separation and drying in the gas-liquid separator 2 , thus completing the cycle of the refrigerant cooling mode. Air sucked by the blower 29 passes through the first heat exchanger 4 sequentially, and is blown into the passenger compartment after exchanging heat by the second heat exchanger 5 to realize cooling of the passenger compartment.

When the cooling mode is running, the fourth parallel solenoid valve 22, the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 can also be closed, that is, the refrigerant is controlled not to flow in the second heat exchanger 5 to exchange with air. Other flow modes of heat and refrigerant are the same as the flow process described above, and will not be repeated here.

When operating in the cooling mode with dual temperature zones, it is sufficient to adjust the opening degrees of the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28, and open the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28. One, or both the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 are open, but the opening degrees are different, that is, the flow out of the two cores of the second heat exchanger 5 is controlled to control the amount of heat exchange between the refrigerant and the air , the other flow modes of the refrigerant are consistent with the flow process of the high-temperature refrigeration mode, and will not be repeated here.

As shown in Figure 4, the cooling mode of the heat pump air-conditioning system and the forced cooling mode of the heat-generating components:

In the cooling mode, when the temperature of the heat-generating component exceeds its own safety requirement, the heat-generating component needs to be cooled. The first parallel solenoid valve 19 is closed, 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, the first parallel electronic expansion valve 23, the second The 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 open; the air blower 29 is open. The high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the third heat exchanger 3 through the second parallel solenoid valve 20 and the second parallel electronic expansion valve 24. After condensing and releasing heat in the device 3, two branches are branched. One path flows into the fourth heat exchanger 6 after being throttled by the first parallel electronic expansion valve 23. At this time, the refrigerant evaporates and absorbs heat in the fourth heat exchanger 6, and then flows out to In the gas-liquid separator 2; the other path flows into the third parallel electronic expansion valve 25 to throttle, and the throttled refrigerant branches into two paths again, and one path flows into the first heat exchanger 4 through the first interface 401 to absorb air heat, and then from The second port 402 flows out, and the other path flows from the fourth port 502 into the second heat exchanger 5 through the first one-way valve 13 and continues to absorb air heat, and then flows out from the third port 501 and the fifth port 503 respectively through the fifth parallel electronic circuit. The expansion valve 27 and the sixth parallel electronic expansion valve 28 then flow into the third parallel electromagnetic valve 21 and the gas-liquid separator 2 through the fourth parallel solenoid valve 22 and the refrigerant flowing out of the second interface 402. At this time, the fifth parallel solenoid valve Both the electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 can be fully opened. The refrigerant flows into the compressor 1 after undergoing gas-liquid separation and drying in the gas-liquid separator 2, and completes the circulation of the refrigerant cooling mode and the forced cooling mode of the heating element. Air in the environment sucked by the blower 29 passes through the first heat exchanger 4 sequentially, and is blown into the passenger compartment after exchanging heat by the second heat exchanger 5 to realize cooling of the passenger compartment.

As shown in Figure 5, the forced cooling mode of the heat-generating components of the heat pump air-conditioning system:

There is no cooling requirement in the passenger compartment, and when the temperature of the heating component exceeds its own safety requirement, it needs to be cooled. At this time, the second parallel solenoid valve 20 can be opened, the first parallel solenoid valve 19, the third parallel solenoid valve 21 and the fourth parallel solenoid valve 22 are all closed; the third parallel electronic expansion valve 25, the fourth parallel electronic expansion valve 26. Both the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 are closed, the first parallel electronic expansion valve 23 and the second parallel electronic expansion valve 24 are both opened, and the blower 29 is closed. The high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the third heat exchanger 3 after passing through the second parallel solenoid valve 20 and the second parallel electronic expansion valve 24. After condensation and heat release in the heat exchanger 3, the first parallel electronic expansion valve 23 throttles and flows into the fourth heat exchanger 6. At this time, the refrigerant evaporates and absorbs heat in the fourth heat exchanger 6, and then flows out to the gas-liquid separator 2 In the process, the refrigerant flows into the compressor 1 after undergoing gas-liquid separation and drying in the gas-liquid separator 2 to complete the forced cooling mode cycle of the heat-generating components.

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

The first parallel solenoid valve 19 and the fourth parallel solenoid valve 22 are opened, the second parallel solenoid valve 20 and the third parallel solenoid valve 21 are closed, the third parallel electronic expansion valve 25 and the fourth parallel electronic expansion valve 26 are both closed, and the first The 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 all open; the air blower 29 is open. The high-temperature and high-pressure refrigerant discharged from the compressor 1 passes through the first parallel solenoid valve 19 and branches into two paths, one path passes through the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 respectively, and then passes through the corresponding third port 501 and fifth port 503 flows into the second heat exchanger 5 to condense and release heat. Both the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 can adjust the flow. Adjusting the flow distribution can realize the dual-temperature zone heating of the passenger compartment; the other path passes through the fourth parallel solenoid valve 22, and then flows into the first heat exchanger 4 through the second interface 402 to condense and release heat. After heat release, the refrigerant passes through the first The refrigerant flows out of the interface 401, and 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, and then flows through the second parallel electronic expansion valve 24 to throttling, refrigerating After the agent evaporates and absorbs heat in the third heat exchanger 3, it flows into the first parallel electronic expansion valve 23, the fourth heat exchanger 6, and the gas-liquid separator 2 in sequence. At this time, the first parallel electronic expansion valve 23 is fully opened, and the fourth exchange There is no coolant flowing in the heat exchanger 6, and 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 flows into the compressor 1 after undergoing gas-liquid separation and drying in the gas-liquid separator 2 to complete the refrigerant heating mode cycle. Air in the environment sucked by the blower 29 passes through the first heat exchanger 4 sequentially, and is blown into the passenger compartment after exchanging heat by the second heat exchanger 5 to realize heating of the passenger compartment.

In the heating passenger compartment mode, if the heat-generating components have waste heat that can be recycled, the refrigerant evaporates and absorbs heat from the third heat exchanger 3 and then flows into the first parallel electronic expansion valve 23 and the fourth heat exchanger 6. At this time The first parallel electronic expansion valve 23 throttles the flow, the refrigerant in the fourth heat exchanger 6 exchanges heat with the waste heat, absorbs the waste heat, and then flows out to the gas-liquid separator 2 and the compressor 1, completing the waste heat recovery mode of the heat-generating components.

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

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

In a relatively low temperature environment, when the car is cold started and the passenger compartment is heated, the heat pump air conditioning system of the vehicle will switch to the mode of compressor 1 self-heating and heating the passenger compartment, and the gaseous refrigerant at the outlet of compressor 1 will cause gas-liquid separation. The inlet of the device 2 is used to increase the suction density, thereby improving the heating capacity of the heat pump air conditioning system.

At this time, both the first parallel solenoid valve 19 and the fourth parallel solenoid valve 22 can be opened, the second parallel solenoid valve 20 and the third parallel solenoid valve 21 can be closed; the third parallel electronic expansion valve 25 can be closed, and the first parallel electronic expansion valve can be closed. The 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 open; the blower 29 is open. Compressor 1 discharges high-temperature and high-pressure refrigerant into two branches, one of which flows into the gas-liquid separator 2 through the fourth parallel electronic expansion valve 26; There are two branches, one of which passes through the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28 respectively, and then flows into the second heat exchanger 5 through the corresponding third interface 501 and fifth interface 503 to condense and release heat, and the fifth parallel electronic expansion valve Both the expansion valve 27 and the sixth parallel electronic expansion valve 28 can be adjusted for flow rate. When both are fully opened, the passenger cabin can be heated in a single temperature zone, and the flow distribution of the two can realize dual temperature zone heating in the passenger cabin; After the other path passes through the fourth parallel solenoid valve 22, it flows into the first heat exchanger 4 through the second interface 402 to condense and release heat. After heat release, the refrigerant flows out through the first interface 401, and then flows through the first one-way valve 13. Combined with the refrigerant flowing out of the fourth interface 502, it flows into the second one-way valve 14, and then passes through the second parallel electronic expansion valve 24 and the third heat exchanger 3, and the refrigerant does not exchange in the third heat exchanger 3. The heat directly flows out to the first parallel electronic expansion valve 23, and then enters the fourth heat exchanger 6 and the gas-liquid separator 2. At this time, the first parallel electronic expansion valve 23 is fully opened, and there is no coolant flow in the fourth heat exchanger 6. The refrigerant does not exchange heat in the fourth heat exchanger 6, and this circuit is equivalent to a connecting channel. The refrigerant flows into the suction port of the compressor 1 after undergoing gas-liquid separation and drying in the gas-liquid separator 2, and completes the self-heating mode cycle of the compressor 1 for heating the passenger compartment. Air in the environment sucked by the blower 29 passes through the first heat exchanger 4 sequentially, and is blown into the passenger compartment after exchanging heat by the second heat exchanger 5 to realize heating of the passenger compartment.

As shown in Figure 8, the 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. Both the second parallel solenoid valve 20 and the fourth parallel solenoid valve 22 can be closed, and the first parallel solenoid valve 19 and the third parallel solenoid valve 21 can both be opened; the first parallel electronic expansion valve 23 and the fourth parallel electronic expansion valve 26 can both be closed. 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 all open, and the blower 29 is open. The high-temperature and high-pressure refrigerant discharged from the compressor 1 passes through the first parallel solenoid valve 19, passes through the fifth parallel electronic expansion valve 27 and the sixth parallel electronic expansion valve 28, and then flows into the second through the corresponding third port 501 and fifth port 503. In the heat exchanger 5, the refrigerant flows out through the fourth interface 502 after condensing and releasing heat in the second heat exchanger 5, and then flows into the third heat exchanger 3 through the second one-way valve 14 and the second parallel electronic expansion valve 24, At this time, the second parallel electronic expansion valve 24 is throttling, and the refrigerant in the third heat exchanger 3 can condense and release heat, or evaporate and absorb heat. Specifically, the opening degree of the second parallel electronic expansion valve 24 needs to be controlled according to the ambient temperature and logic. determined, then pass through the third parallel electronic expansion valve 25, flow into the first heat exchanger 4 through the first interface 401, absorb air heat in the first heat exchanger 4 to reduce air humidity, flow out through the second interface 402, and then pass through the first heat exchanger 4 Three parallel solenoid valves 21 and the gas-liquid separator 2 flow into the compressor 1 . The humid air inhaled by the blower 29 from the passenger compartment passes through the first heat exchanger 4 for cooling and dehumidification, and then passes through the second heat exchanger 5 to absorb heat and raise the temperature to maintain the comfort of the passenger compartment.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope. 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 the understanding of this description. Furthermore, those skilled in the art will understand that although some embodiments described herein include some features included in other embodiments but not others, combinations of features from 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, characterized in that it comprises: a power source assembly, a reversing assembly, a first heat exchanger (4), a second heat exchanger (5), a third heat exchanger (3) and parallel pipeline (7); the first heat exchanger (4) includes a first interface (401) and a second interface (402), and the second heat exchanger (5) includes a third interface (501) and a fourth An interface (502), the third heat exchanger (3) includes a first communication port (301) and a second communication port (302); The reversing assembly communicates with the outflow end of the power source assembly, and the reversing assembly is respectively connected with the first communication port (301), the second interface (402) and the third interface (501), so as to The power source assembly communicates with the first communication port (301) or communicates the power source assembly with the second interface (402) and the third interface (501); The second interface (402) communicates with the inflow end of the power source assembly through the first pipeline (8), the first pipeline (8) is provided with a first valve, and 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) communicates with the second communication port (302) through the third pipeline (11), and the fourth interface (502) communicates with the first communication port through the fourth pipeline (12). port (301); one end of the parallel pipeline (7) communicates with the first interface (401), and the other end communicates with the fourth interface (502); The second communication port (302) communicates with the inflow end of the power source assembly through the first branch pipe (10), and the first branch pipe (10) is provided with a third valve. 2. The heat pump air-conditioning system according to claim 1, characterized in that, the second pipeline (9) communicates with the reversing assembly, and the first pipeline (8) communicates with the second pipeline (9) communication; the second valve is located at the connection point between the second pipeline (9) and the reversing assembly and at the connection point between the first pipeline (8) and the second pipeline (9) Between the connection points, the first valve is located at the connection point between the first pipeline (8) and the second pipeline (9) and at the connection point between the first pipeline (8) and the power source assembly Between connected points at the inflow end. 3. The heat pump air-conditioning system according to claim 2, characterized in that, the parallel pipeline (7) is provided with a first one-way valve (13), and the first one-way valve (13) prevents the fluid from passing through the The side of the fourth interface (502) flows to the side of the first interface (401). 4. The heat pump air-conditioning system according to claim 2, characterized in that, the heat pump air-conditioning system further comprises a fourth heat exchanger (6); the fourth heat exchanger is connected to the first branch pipe (10) superior. 5. The heat pump air-conditioning system according to claim 2, characterized in that, both the reversing assembly and the parallel pipeline (7) are in communication with the fourth pipeline (12); the fourth pipeline ( 12) is connected with a second one-way valve (14), and the second one-way valve (14) is located at the communication point between the reversing assembly and the fourth pipeline (12) and the parallel pipeline (7 ) and the connection point of the fourth pipeline (12). 6. The heat pump air-conditioning system according to claim 5, characterized in that, a fourth valve is also provided on the fourth pipeline (12); the first branch pipe (10) and the parallel pipeline (7) All communicate with the third pipeline (11); the third pipeline (11) is provided with a fifth valve. 7. The heat pump air-conditioning system according to claim 2, characterized in that, the heat pump air-conditioning system further comprises a second branch pipe (15), one end of the second branch pipe (15) is connected to the outflow end of the power source assembly The other end communicates with the inflow end of the power source assembly, and the second branch pipe (15) is provided with a sixth valve. 8. The heat pump air-conditioning system according to claim 2, wherein the reversing assembly is a three-way solenoid valve. 9. The heat pump air-conditioning system according to claim 2, characterized in that, the heat pump air-conditioning system further comprises a third branch pipe (16) and a fourth branch pipe (17); the third branch pipe (16) communicates with the Between the outflow end of the power source assembly and the second pipeline (9), the fourth branch pipe (17) communicates between the outflow end of the power source assembly and the fourth pipeline (12); The reversing assembly includes a first parallel solenoid valve (19) arranged on the third branch pipe (16) and a second parallel solenoid valve (20) arranged on the fourth branch pipe (17). 10. The heat pump air-conditioning system according to any one of claims 1-9, characterized in that, the second heat exchanger (5) further includes a fifth interface (503), and the heat pump air-conditioning system further includes a first Five branch pipes (18), the fifth branch pipe (18) communicates between the second pipeline (9) and the fifth interface (503); on the second pipeline (9), it is located at the A seventh valve is provided between the connection point between the second pipeline (9) and the fifth branch pipe (18) and the third interface (501), and the fifth branch pipe (18) is provided with a first Eight valves.

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