Multifunctional triangular circulation heat pump integrated system

Abstract

The invention relates to a multifunctional triangular circulation heat pump integrated system which comprises a first refrigerant loop, a second refrigerant loop, a compressor in a heat pump module and a valve terminal. The first check valve, the second check valve, the backflow expansion valve, the third expansion valve, the gas-liquid separation tank and the waste heat recovery heat exchanger are installed on the valve terminal, a thermally coupled refrigerant and a water cooling passage are included, and the two ends of the water cooling passage are connected with a water cooling heat exchange inlet and a water cooling heat exchange outlet respectively; the valve terminal comprises a flow channel mechanism, and all the elements are connected with the flow channel mechanism. The flow channel mechanism comprises a backflow loop; the valve terminal is provided with an external connector, the first external connector is connected with the first check valve through the valve terminal, the second external connector is connected with the second check valve through the valve terminal, the third external connector is connected with the third expansion valve through the valve terminal, and the fourth external connector is connected with a separation inlet of the gas-liquid separation tank through the valve terminal. The heating performance of the compressor can be improved by arranging the backflow loop, elements such as the waste heat recovery heat exchanger are integrated through the valve terminal, and functionality is high.

Description

TECHNICAL FIELD

[0001] The present application relates to a vehicle thermal management system, in particular to a multifunctional triangular cycle heat pump integrated system. BACKGROUND

[0002] The description in this part only provides background information related to the present application disclosure, and does not constitute prior art.

[0003] In pure electric, hybrid and other vehicle models, the vehicle heat pump system realizes heat transfer by compressing the refrigerant with the compressor, and then exchanges heat with the cooling liquid circuit, and then cools or heats the corresponding heat exchange unit.

[0004] In extremely cold vehicle operating environment, due to low temperature, the temperature of the refrigerant flowing back to the suction port of the compressor is low, so that the temperature of the refrigerant discharged from the exhaust port of the compressor after being pressurized by the compressor may not meet the standard, and the preset temperature line may not be reached, resulting in a great impact on the heating function of the vehicle. At the same time, the functional elements in the existing thermal management system have poor integration, and the waste heat recovery heat exchanger and other elements need to be externally connected outside the integrated module, and the functionality is poor.

[0005] It should be noted that the above introduction to the technical background is only to facilitate the clear and complete description of the technical scheme of the present application, and to facilitate the understanding of those skilled in the art. The above technical scheme cannot be considered as known to those skilled in the art only because it is described in the background section of the present application. SUMMARY

[0006] The purpose of the present application is to provide a multifunctional triangular cycle heat pump integrated system, which can improve the heating performance of the compressor by setting the return circuit, and set the waste heat recovery heat exchanger and other elements inside the integrated module through the valve island, and has strong functionality.

[0007] In order to achieve the above purpose, the present application discloses a multifunctional triangular cycle heat pump integrated system, which comprises: A first refrigerant circuit; A second refrigerant circuit; The pump module comprises: a compressor, a valve island mounted on the compressor, a first non-return valve mounted on the valve island, a second non-return valve, a return expansion valve, a third expansion valve, a gas-liquid separation tank, and a waste heat recovery heat exchanger; wherein the inside of the waste heat recovery heat exchanger comprises a refrigerant passage and a water cooling passage which are thermally coupled to each other, and the water cooling passage is connected with a water cooling heat exchange inlet and a water cooling heat exchange outlet at two ends respectively; the valve island comprises a flow channel mechanism formed inside for flowing refrigerant, and the first non-return valve, the second non-return valve, the return expansion valve, the third expansion valve, the gas-liquid separation tank, and the refrigerant passage are connected with the flow channel mechanism respectively; the flow channel mechanism comprises a return circuit for connecting the exhaust port of the compressor with the return expansion valve; the valve island further comprises a first external interface, a second external interface, a third external interface, and a fourth external interface, the first external interface is connected with the first non-return valve through the valve island, the second external interface is connected with the second non-return valve through the valve island, the third external interface is connected with the third expansion valve through the valve island, and the fourth external interface is connected with the separation inlet of the gas-liquid separation tank through the valve island. The first external interface and the third external interface are connected with a first condenser heat exchange unit, a first expansion valve, and at least one functional element with heat exchange function in sequence through a first refrigerant circuit outside the valve island; refrigerant can flow through the first external interface, the first condenser heat exchange unit, the first expansion valve, and at least one functional element with heat exchange function in sequence and then return to the third external interface. The second external interface and the fourth external interface are connected with a second condenser heat exchange unit, a second expansion valve, and an evaporator heat exchange unit in sequence through a second refrigerant circuit outside the valve island; refrigerant can flow through the second external interface, the second condenser heat exchange unit, the second expansion valve, and the evaporator heat exchange unit in sequence and then return to the fourth external interface.

[0008] As a further description of the above technical solution, the first external interface and the second external interface are arranged on the same face of the valve island, and the third external interface and the fourth external interface are arranged on independent faces different from the first external interface and the second external interface respectively.

[0009] As a further description of the above technical solution, the water cooling heat exchange inlet and the water cooling heat exchange outlet are arranged towards a first direction, and the first external interface and the second external interface are arranged towards a second direction away from the first direction.

[0010] As a further description of the above technical solution, the third external interface and the fourth external interface are arranged towards a direction perpendicular to the first direction and the second direction.

[0011] As a further description of the above technical solution, the compressor has a preset centroid, and the centroid of the valve island, the first non-return valve, the second non-return valve, the backflow expansion valve, the third expansion valve, the gas-liquid separation tank and the waste heat recovery heat exchanger is adjacent to or located on a vertical plane of the preset centroid.

[0012] As a further description of the above technical solution, the two ends of the refrigerant passage are respectively connected with a refrigerant heat exchange inlet and a refrigerant heat exchange outlet, the flow channel mechanism comprises a first channel, a second channel, a third channel, a fourth channel, a fifth channel and a sixth channel, the exhaust port of the compressor is connected with the first non-return valve through the first channel, the exhaust port of the compressor is connected with the second non-return valve through the second channel, the exhaust port of the compressor is connected with the backflow expansion valve through the third channel, the backflow expansion valve is connected with the separation inlet of the gas-liquid separation tank through the fourth channel, the separation outlet of the gas-liquid separation tank is directly connected with the suction port of the compressor, the third expansion valve is connected with the refrigerant heat exchange inlet through the fifth channel, and the refrigerant heat exchange inlet is connected with the separation inlet of the gas-liquid separation tank through the sixth channel.

[0013] As a further description of the above technical solution, the functional element with the heat exchange function comprises a battery heat exchange unit.

[0014] Through the above technical solution, the beneficial effects of the present application are as follows: The multifunctional triangular cycle heat pump integrated system can improve the heating performance of the compressor by setting the backflow circuit, and the waste heat recovery heat exchanger and other elements are arranged in the integrated module by the valve island, so that the system has strong functions. In the present application, the introduction of the backflow circuit improves the exhaust temperature of the compressor at low temperature, so that the heated refrigerant of the compressor directly returns to the compressor through the backflow circuit, and the exhaust temperature of the compressor reaches a specified temperature through multiple cycles, so that the heating speed of the compressor at low temperature is improved, and the compressor is more suitable for extremely low temperature environment. At the same time, the waste heat recovery heat exchanger is integrated on the top of the compressor by the valve island, and the corresponding external interface and external pipeline on the valve island are easy to install and have strong functions.

[0015] In order to further understand the features and technical contents of the present application, please refer to the following detailed description and drawings of the present application. However, the provided drawings are only used for reference and illustration, and are not used to limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present specification or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments described in the present specification, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figures 1-2 is a three-dimensional schematic view of a heat pump module of a multifunctional triangular cycle heat pump integrated system provided by an embodiment of the present specification; Figures 3-4 is an exploded schematic view of a heat pump module of a multifunctional triangular cycle heat pump integrated system provided by an embodiment of the present specification; Figures 5-9 is a valve island schematic view of a heat pump module of a multifunctional triangular cycle heat pump integrated system provided by an embodiment of the present specification; Figures 10-11 is a system schematic view of a multifunctional triangular cycle heat pump integrated system provided by an embodiment of the present specification; In the figure: 1, compressor; 1A, exhaust port; 1B, suction port; 11, gas-liquid separation tank; 11A, separation inlet; 11B, separation outlet; 12, low-pressure side filling port; 2, first refrigerant circuit; 21, first non-return valve; 22, first condenser heat exchange unit; 23, first expansion valve; 24, battery heat exchange unit; 25, third expansion valve; 26, waste heat recovery heat exchanger; 26A, water-cooled heat exchange inlet; 26B, water-cooled heat exchange outlet; 26C, refrigerant heat exchange inlet; 26D, refrigerant heat exchange outlet; 27, first one-way valve; 28, warm air core; 3, second refrigerant circuit; 31, second non-return valve; 32, second condenser heat exchange unit; 33, radiator; 34, second expansion valve; 35, evaporator heat exchange unit; 4, backflow circuit; 41, backflow expansion valve; 5, first three-way water valve; 51, first three-way water valve first valve port; 52, first three-way water valve second valve port; 53, first three-way water valve third valve port; 6, second three-way water valve; 61, second three-way water valve first valve port; 62, second three-way water valve second valve port; 63, second three-way water valve third valve port; 7, battery heat exchange auxiliary circuit; 71, second one-way valve; 8, drive motor heat exchange unit; 9, valve island; 91, first external port; 92, second external port; 93, third external port; 94, fourth external port; 95, first passage; 96, second passage; 97, third passage; 98, fourth passage; 99, fifth passage; 910, sixth passage. DETAILED DESCRIPTION

[0018] In order to make the person skilled in the art better understand the technical solutions in the specification, the technical solutions in the specification will be clearly and completely described below in combination with the drawings in the specification. Obviously, the described embodiments are only part of the embodiments of the specification, not all. Based on the embodiments in the specification, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the specification.

[0019] The following is to illustrate the embodiments of the present application by specific embodiments, and the person skilled in the art can understand the advantages and effects of the present application from the disclosure of the specification. The present application can be implemented or applied by other different specific embodiments, and the details in the specification can be modified and changed in various ways based on different views and applications without departing from the concept of the present application. In addition, the drawings of the present application are only simple schematic illustrations, not the depiction according to the actual size, and the prior declaration. The following embodiments will further illustrate the related technical content of the present application, but the disclosed content is not used to limit the protection scope of the present application.

[0020] It should be understood that although the terms such as "first", "second", "third" and the like may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are mainly used to distinguish one component from another component, or one signal from another signal. In addition, the term "or" used herein may include any one or more combinations of the associated listed items as appropriate.

[0021] Please refer to Figure 1 A multifunctional triangular cycle heat pump integrated system is provided in the embodiment, wherein the multifunctional triangular cycle heat pump integrated system comprises: a first refrigerant circuit 2; a second refrigerant circuit 3; a compressor 1 and a valve island 9 installed on the compressor 1; a first non-return valve 21, a second non-return valve 31, a return flow expansion valve 41, a third expansion valve 25, a gas-liquid separation tank 11 and a waste heat recovery heat exchanger 26 installed on the valve island 9; wherein the inside of the waste heat recovery heat exchanger 26 comprises a refrigerant passage and a water cooling passage which are thermally coupled with each other, and the water cooling passage has a water cooling heat exchange inlet 26A and a water cooling heat exchange outlet 26B connected at two ends thereof, respectively; Wherein, the valve island 9 includes an internal through-flow formed flow channel mechanism for circulating refrigerant, the first stop valve 21, the second stop valve 31, the return expansion valve 41, the third expansion valve 25, the gas-liquid separation tank 11, and the refrigerant passage are connected with the flow channel mechanism respectively; the flow channel mechanism includes a return circuit 4 for connecting the exhaust port 1A of the compressor 1 with the return expansion valve 41. The valve island 9 further includes a first external interface 91, a second external interface 92, a third external interface 93, and a fourth external interface 94, the first external interface 91 is connected with the first stop valve 21 through the valve island 9, the second external interface 92 is connected with the second stop valve 31 through the valve island 9, the third external interface 93 is connected with the third expansion valve 25 through the valve island 9, and the fourth external interface 94 is connected with the separation inlet 11A of the gas-liquid separation tank 11 through the valve island 9.

[0022] Wherein, the first external interface 91 and the third external interface 93 are connected with the first condenser heat exchange unit 22, the first expansion valve 23, and at least one functional element with heat exchange function in sequence through the first refrigerant circuit 2 outside the valve island 9. The second external interface 92 and the fourth external interface 94 are connected with the second condenser heat exchange unit 32, the second expansion valve 34, and the evaporator heat exchange unit 35 in sequence through the second refrigerant circuit 3 outside the valve island 9.

[0023] With the above structure of the present application, the setting of the return circuit 4 can improve the heating performance of the compressor 1, and the elements such as the waste heat recovery heat exchanger 26 are arranged inside the integrated module through the valve island 9, which is functional. In the present application, the introduction of the return circuit 4 can improve the exhaust temperature of the compressor 1 at low temperature, so that the heated refrigerant of the compressor 1 can directly return to the compressor 1 through the return circuit 4, and the exhaust temperature of the compressor 1 can reach the specified temperature through multiple cycles, so as to improve the heating speed of the compressor 1 at low temperature and adapt to extreme low temperature environment. At the same time, the waste heat recovery heat exchanger 26 is integrated on the top of the compressor 1 through the valve island 9 in the present application, and the corresponding external interface and external pipeline of the valve island 9 are easy to install and have strong functionality.

[0024] Please refer to Figures 5-9A connection diagram of the flow path mechanism of the valve island 9 provided for the present embodiment is shown in FIG. 6, in which the two ends of the refrigerant passage are connected with the refrigerant heat exchange inlet 26C and the refrigerant heat exchange outlet 26D, respectively. The flow path mechanism includes a first passage 95, a second passage 96, a third passage 97, a fourth passage 98, a fifth passage 99, and a sixth passage 910. The discharge port 1A of the compressor 1 is connected with the first stop valve 21 through the first passage 95, the discharge port 1A of the compressor 1 is connected with the second stop valve 31 through the second passage 96, the discharge port 1A of the compressor 1 is connected with the backflow expansion valve 41 through the third passage 97, the backflow expansion valve 41 is connected with the separation inlet 11A of the gas-liquid separation tank 11 through the fourth passage 98, the separation outlet 11B of the gas-liquid separation tank 11 is directly connected with the suction port 1B of the compressor 1, the third expansion valve 25 is connected with the refrigerant heat exchange inlet 26C through the fifth passage 99, and the refrigerant heat exchange inlet 26C is connected with the separation inlet 11A of the gas-liquid separation tank 11 through the sixth passage 910. Specifically, as shown in FIG. 6, the first passage 95, the second passage 96, and the third passage 97 actually share the same physical passage, but their lengths are different, and the first passage 95 extends to the downstream through the installed second stop valve 31, and the third passage 97 extends to the downstream through the installed first stop valve 21 and the second stop valve 31. Figure 6

[0025] In one of the embodiments, the compressor 1 has a preset centroid, and the centroid of the whole of the valve island 9, the first stop valve 21, the second stop valve 31, the backflow expansion valve 41, the third expansion valve 25, the gas-liquid separation tank 11, and the waste heat recovery heat exchanger 26 is close to or located on the vertical plane of the preset centroid. Through the adjustment of the centroid as described above, in the case that the compressor 1 directly bears the force of all the elements, the vibration and abnormal sound caused by the displacement of the centroid during the operation of the compressor 1 can be reduced.

[0026] ​In this invention, considering the convenience of the interface arrangement on the valve island 9 to facilitate the installation of pipelines in the external thermal management system, the first external interface 91 and the second external interface 92 are located on the same surface of the valve island 9, while the third external interface 93 and the fourth external interface 94 are located on separate surfaces different from the first external interface 91 and the second external interface 92. The water-cooled heat exchange inlet 26A and the water-cooled heat exchange outlet 26B are oriented towards a first direction, while the first external interface 91 and the second external interface 92 are oriented towards a second direction opposite to the first direction. The third external interface 93 and the fourth external interface 94 are oriented towards directions perpendicular to the first and second directions, respectively. From a functional perspective, in one embodiment, the first external interface 91 and the third external interface 93 are connected in series outside the valve island 9 via a first refrigerant circuit 2, consisting of a first condenser heat exchange unit 22, a first expansion valve 23, and at least one functional element with heat exchange function. The functional element with heat exchange function includes a battery heat exchange unit 24. Between the second external interface 92 and the fourth external interface 94, a second condenser heat exchange unit 32, a second expansion valve 34, and an evaporator heat exchange unit 35 are sequentially connected in series via a second refrigerant circuit 3 outside the valve island 9. The aforementioned first external interface 91, second external interface 92, and third external interface 93 can be configured such that one end connects to the outer wall of the valve island 9 for connecting to external pipelines, and the other end connects to corresponding components inside the valve island 9. The first external interface 91, second external interface 92, and third external interface 93 can be considered as extension interfaces connecting the corresponding components to external pipelines via the valve island 9, and all are integrated within the single valve island 9. Figure 7 As shown, in the above-mentioned flow channel mechanism, the fourth external interface 94 is connected to the separation inlet 11A of the gas-liquid separator 11 via the physical channel where the fourth channel 98 is located.

[0027] Please see details. Figures 10-11 This is an embodiment of the multifunctional triangular cycle heat pump integrated system of the present invention installed in a specific and complete thermal management system, wherein... Figure 10 This is a general schematic diagram of the thermal management system. Figure 11 This is a schematic diagram of the interfaces connecting the present invention to the thermal management system. Figure 11 The dashed box in the figure represents the heat pump integrated module of this invention.

[0028] The thermal management system includes: The first refrigerant circuit 2 includes a first check valve 21, a first condenser heat exchange unit, a first expansion valve 23, and at least one functional component with heat exchange function, which are arranged in series. The two ends of the first refrigerant circuit 2 are respectively connected to the suction port and the discharge port of the compressor 1. The second refrigerant circuit 3 comprises a second non-return valve 31, a second condenser heat exchange unit, a second expansion valve 34 and an evaporator heat exchange unit arranged in series; the outlet of the second condenser heat exchange unit is also connected to the inlet of the first expansion valve 23, and the two ends of the second refrigerant circuit 3 are respectively connected to the suction port and the discharge port of the compressor 1; The reflux circuit 4 comprises the compressor 1 and a reflux expansion valve 41 arranged in series, and the two ends of the reflux circuit 4 are respectively connected to the suction port and the discharge port of the compressor 1, so as to guide at least part of the refrigerant to flow back to the compressor 1 through the reflux expansion valve 41 during the operation of the compressor 1, so as to control the outlet temperature of the compressor 1.

[0029] Based on the above structure of the present application, during the operation, when the first non-return valve 21 is opened, the compressed refrigerant is discharged into the first refrigerant circuit 2, the refrigerant heats the first condenser heat exchange unit 22 when flowing through the first condenser heat exchange unit 22, thereby heating the passenger compartment, and the refrigerant is throttled to a low-temperature and low-pressure state when flowing through the first expansion valve 23, and then flows into the corresponding downstream heat exchange unit for heat exchange, and finally returns from the suction port side of the compressor 1.

[0030] When the second non-return valve 31 is opened, the compressed refrigerant is discharged into the second refrigerant circuit 3, the refrigerant heats or radiates heat through the second condenser heat exchange unit 32 when flowing through the second condenser heat exchange unit 32, the refrigerant is throttled to a low-temperature and low-pressure state when flowing through the second expansion valve 34, and then flows into the downstream evaporator heat exchange unit 35 for heat exchange, thereby refrigerating the passenger compartment, and finally returns from the suction port side of the compressor 1. The refrigerant can also flow from the second condenser heat exchange unit 32 to the first expansion valve 23, and be throttled to a low-temperature and low-pressure state, and then flow into the corresponding downstream heat exchange unit for heat exchange, and finally return from the suction port side of the compressor 1.

[0031] Meanwhile, during the operation of the compressor 1, part of the refrigerant discharged from the compressor 1 is branched to the reflux circuit 4, then throttled and refluxed to the suction port of the compressor 1, and the refluxed refrigerant has a higher temperature than the refrigerant refluxed in the first refrigerant circuit 2 and the second refrigerant circuit 3. Through multiple and continuous circulation reflux, the outlet temperature of the compressor 1 is controlled to be higher than that without the reflux circuit 4. Therefore, by providing the reflux circuit 4, the outlet temperature of the compressor 1 at low temperature can be increased, and the heat exchange between the refrigerant and the corresponding functional element with heat exchange function is directly performed, which has higher integration than indirect liquid cooling heat exchange. Specifically, after the compressor 1 heats the refrigerant, the refrigerant is directly refluxed to the compressor 1 through the reflux circuit 4, and the outlet temperature of the compressor 1 reaches a specified temperature through multiple circulation, so as to increase the heating speed of the compressor 1 at low temperature and better adapt to extremely low temperature environment.

[0032] In the above structure of the present application, in the first refrigerant circuit 2, the corresponding functional element with heat exchange function is directly exchanged with the refrigerant, the first condenser heat exchange unit 22, the second condenser heat exchange unit 32 and the Zhangfaji 35 are also directly exchanged with the refrigerant, which reduces the length of the cooling liquid circuit compared with the method of heat exchange through cooling liquid heat exchange, so that the overall volume is compressed to the maximum extent.

[0033] Further, the functional element with heat exchange function between the first expansion valve 23 and the compressor 1 includes a battery heat exchange unit 24, a third expansion valve 25 and a waste heat recovery heat exchanger 26 arranged in series. The waste heat recovery heat exchanger 26 includes a refrigerant passage and a water cooling passage, and the refrigerant passage is connected in series between the battery heat exchange unit 24, the third expansion valve 25 and the compressor 1, and the refrigerant passage and the water cooling passage are thermally coupled with each other. By directly connecting the battery heat exchange unit 24 in series in the passage of the first refrigerant circuit 2, the refrigerant is directly cooled or cooled by the battery heat exchange unit 24 and the waste heat recovery heat exchanger 26 under the control of the first expansion valve 23 and the second expansion valve 34.

[0034] Further, a first one-way valve is arranged between the first condenser heat exchange unit 22 and the first expansion valve 23, the battery heat exchange unit 24 is connected in parallel with a battery heat exchange auxiliary circuit 7, the first end of the battery heat exchange auxiliary circuit 7 is connected between the first condenser heat exchange unit 22 and the first one-way valve 27, the second end of the battery heat exchange auxiliary circuit 7 is connected to the outlet end of the battery heat exchange unit 24, and the battery heat exchange auxiliary circuit 7 is provided with a second one-way valve 71. By cooperating the battery heat exchange auxiliary circuit 7 and the two one-way valves, it can be determined whether the refrigerant passes through the battery heat exchange unit 24 and exchanges heat with it.

[0035] The first expansion valve 23 and the return expansion valve 41 described above are large-diameter double-needle expansion valves having a throttling mode in which the refrigerant passing through is throttled and a straight-through mode in which the refrigerant is allowed to pass normally.

[0036] Based on the system layout described above, the following are examples of various operating modes that can be implemented.

[0037] In one of the operating modes, the passenger compartment is heated in response to a heating demand for the vehicle cabin, and the temperature is controlled within a certain range, such as 20-30°C. In this mode, the first shut-off valve 21 is open, the second shut-off valve 31 is closed, the compressor 1 is operating, the refrigerant flows from the compressor 1 discharge port to the first condenser heat exchange unit 22, and the first condenser heat exchange unit 22 releases heat to the passenger compartment via the warm air core 28 on one side to heat the passenger compartment, directly providing warm air to the passenger compartment, the first check valve 27 is closed, and the second check valve 71 is open, and finally the refrigerant passes through the battery heat exchange unit 24 and returns to the compressor 1.

[0038] In one of the operating modes, the passenger compartment is heated in response to a heating demand for the vehicle cabin, and the temperature is controlled within a certain range, such as 20-30°C. In this mode, the first shut-off valve 21 is open, the second shut-off valve 31 is closed, the compressor 1 is operating, the refrigerant flows from the compressor 1 discharge port to the first condenser heat exchange unit 22, and the first condenser heat exchange unit 22 releases heat to the passenger compartment via the warm air core 28 on one side to heat the passenger compartment, directly providing warm air to the passenger compartment, the first check valve 27 is closed, and the second check valve 71 is open, and finally the refrigerant passes through the battery heat exchange unit 24 and returns to the compressor 1.

[0039] In one of the operating modes, the passenger compartment is heated in response to a heating demand for the vehicle cabin, and the temperature is controlled within a certain range, such as 20-30°C. In this mode, the first shut-off valve 21 is open, the second shut-off valve 31 is closed, the compressor 1 is operating, the refrigerant flows from the compressor 1 discharge port to the first condenser heat exchange unit 22, and the first condenser heat exchange unit 22 releases heat to the passenger compartment via the warm air core 28 on one side to heat the passenger compartment, directly providing warm air to the passenger compartment, the first check valve 27 is closed, and the second check valve 71 is open, and finally the refrigerant passes through the battery heat exchange unit 24 and returns to the compressor 1.

[0040] In one mode of operation, in response to the vehicle cabin heating and dehumidifying demand, the passenger cabin is heated and dehumidified, and the temperature control is controlled within a certain range, such as 20-30℃, etc. In this mode, the first non-return valve 21 is opened, the second non-return valve 31 is opened, the compressor 1 is running, the refrigerant flows from the compressor 1 exhaust port to the first condenser heat exchange unit 22, and the heat of the first condenser heat exchange unit 22 is released to the passenger cabin by the warm air core 28 on one side to heat the passenger cabin, and the warm air is directly provided to the passenger cabin, the first one-way valve 27 is closed, the second one-way valve 71 is opened, and finally the refrigerant passes through the battery heat exchange unit 24 and returns to the compressor 1. At the same time, the refrigerant flows from the compressor 1 exhaust port to the second condenser heat exchange unit 32, and the heat of the second condenser heat exchange unit 32 is dissipated to the outside by the blower on one side, and then flows through the second expansion valve 34 for throttling, and the refrigerant is cooled and decompressed after flowing through the evaporator heat exchange unit 35, and the passenger cabin is dehumidified by the cooling and condensation of the evaporator heat exchange unit 35, and then returns to the compressor 1.

[0041] In one mode of operation, in response to the vehicle cabin heating and dehumidifying demand, the passenger cabin is heated and dehumidified, and the temperature control is controlled within a certain range, such as 20-30℃, etc. In this mode, the first non-return valve 21 is opened, the second non-return valve 31 is opened, the compressor 1 is running, the refrigerant flows from the compressor 1 exhaust port to the first condenser heat exchange unit 22, and the heat of the first condenser heat exchange unit 22 is released to the passenger cabin by the warm air core 28 on one side to heat the passenger cabin, and the warm air is directly provided to the passenger cabin, the first one-way valve 27 is closed, the second one-way valve 71 is opened, and finally the refrigerant passes through the battery heat exchange unit 24 and returns to the compressor 1. At the same time, the refrigerant flows from the compressor 1 exhaust port to the second condenser heat exchange unit 32, and the heat of the second condenser heat exchange unit 32 is dissipated to the outside by the blower on one side, and then flows through the second expansion valve 34 for throttling, and the refrigerant is cooled and decompressed after flowing through the evaporator heat exchange unit 35, and the passenger cabin is dehumidified by the cooling and condensation of the evaporator heat exchange unit 35, and then returns to the compressor 1.

[0042] In one mode of operation, in response to the vehicle cabin heating and dehumidifying demand, the passenger cabin is heated and dehumidified, and the temperature control is controlled within a certain range, such as 20-30℃, etc. In this mode, the first non-return valve 21 is opened, the second non-return valve 31 is opened, the compressor 1 is running, the refrigerant flows from the compressor 1 exhaust port to the first condenser heat exchange unit 22, and the heat of the first condenser heat exchange unit 22 is released to the passenger cabin by the warm air core 28 on one side to heat the passenger cabin, and the warm air is directly provided to the passenger cabin, the first one-way valve 27 is closed, the second one-way valve 71 is opened, and finally the refrigerant passes through the battery heat exchange unit 24 and returns to the compressor 1. At the same time, the refrigerant flows from the compressor 1 exhaust port to the second condenser heat exchange unit 32, and the heat of the second condenser heat exchange unit 32 is dissipated to the outside by the blower on one side, and then flows through the second expansion valve 34 for throttling, and the refrigerant is cooled and decompressed after flowing through the evaporator heat exchange unit 35, and the passenger cabin is dehumidified by the cooling and condensation of the evaporator heat exchange unit 35, and then returns to the compressor 1.

[0043] In one mode, the passenger cabin is cooled and the battery pack is cooled simultaneously in response to the cooling demand of the vehicle cabin and the cooling demand of the battery pack, and the temperature control is controlled within a certain range, such as 20-30℃. In this mode, the first non-return valve 21 is closed, the second non-return valve 31 is opened, the compressor 1 is operated, the refrigerant flows from the compressor 1 discharge port to the second condenser heat exchange unit 32, and the second condenser heat exchange unit 32 is cooled by the side blower, and then flows through the second expansion valve 34 for throttling, and the refrigerant is cooled and decompressed after flowing through the evaporator heat exchange unit 35, and the passenger cabin is cooled by the evaporator heat exchange unit 35 with the assistance of the side blower, and then returns to the compressor 1. Synchronously, part of the refrigerant flows through the first expansion valve 23 for throttling, and the refrigerant is cooled and decompressed after flowing through the battery heat exchange unit 24 and exchanges heat with it, achieving cooling of the battery pack, and finally returning to the compressor 1.

[0044] Further, in another scheme, the first three-way water valve 5 and the second three-way water valve 6 can be provided to control the peripheral cooling liquid pipeline to achieve heat exchange management of the waste heat recovery heat exchanger 26, the radiator 33 and the drive motor heat exchange unit 8. There are several schemes as follows.

[0045] In one mode, the water cooling path of the waste heat recovery heat exchanger 26 is connected in series with the water cooling heat exchange outlet 26B, the drive motor heat exchange unit 8, the first valve port 51 of the first three-way water valve, the second valve port 52 of the first three-way water valve, the first valve port 61 of the second three-way water valve, the second valve port 62 of the second three-way water valve, and the water cooling heat exchange inlet 26A, and the water cooling liquid returns to the water cooling heat exchange inlet 26A after passing through the water cooling heat exchange outlet 26B, the drive motor heat exchange unit 8, the first valve port 51 of the first three-way water valve, the second valve port 52 of the first three-way water valve, the first valve port 61 of the second three-way water valve, and the second valve port 62 of the second three-way water valve. In this scheme, the water cooling liquid can be connected in series and flow between the waste heat recovery heat exchanger 26 and the drive motor heat exchange unit 8 as needed, achieving temperature control of the drive motor heat exchange unit 8.

[0046] In one mode, the water cooling passage is connected in series with the water cooling heat exchange outlet 26B, the drive motor heat exchange unit 8, the first valve port 51 of the first three-way water valve 5, the third valve port 53 of the first three-way water valve 5, the radiator 33, the first valve port 61 of the second three-way water valve 6, the second valve port 62 of the second three-way water valve 6, and the water cooling heat exchange inlet 26A. The water cooling liquid flows through the water cooling heat exchange outlet 26B, the drive motor heat exchange unit 8, the first valve port 51 of the first three-way water valve 5, the third valve port 53 of the first three-way water valve 5, the radiator 33, the first valve port 61 of the second three-way water valve 6, the second valve port 62 of the second three-way water valve 6, and then returns to the water cooling heat exchange inlet 26A. In this scheme, the water cooling liquid can flow in series between the waste heat recovery heat exchanger 26, the drive motor heat exchange unit 8, and the radiator 33 as needed, achieving temperature control of the drive motor heat exchange unit 8 and recovering waste heat from the radiator 33.

[0047] In one mode, the water cooling passage is connected in parallel with the auxiliary water cooling passage through the first three-way water valve 5, and the auxiliary water cooling passage is connected in series with the drive motor heat exchange unit 8, the first valve port 51 of the first three-way water valve 5, the second valve port 52 of the first three-way water valve 5, the first valve port 61 of the second three-way water valve 6, and the third valve port 63 of the second three-way water valve 6. The water cooling liquid flows through the drive motor heat exchange unit 8, the first valve port 51 of the first three-way water valve 5, the second valve port 52 of the first three-way water valve 5, the first valve port 61 of the second three-way water valve 6, and the third valve port 63 of the second three-way water valve 6, and then returns to the auxiliary water cooling passage. In this scheme, the water cooling liquid can flow through the drive motor heat exchange unit 8 as needed, achieving temperature control of the drive motor heat exchange unit 8.

[0048] In one mode, the water cooling passage is connected in parallel with the auxiliary water cooling passage through the first three-way water valve 5, and the auxiliary water cooling passage is connected in series with the drive motor heat exchange unit 8, the first valve port 51 of the first three-way water valve 5, the third valve port 53 of the first three-way water valve 5, the radiator 33, the first valve port 61 of the second three-way water valve 6, and the third valve port 63 of the second three-way water valve 6. The water cooling liquid flows through the drive motor heat exchange unit 8, the first valve port 51 of the first three-way water valve 5, the third valve port 53 of the first three-way water valve 5, the radiator 33, the first valve port 61 of the second three-way water valve 6, and the third valve port 63 of the second three-way water valve 6, and then returns to the auxiliary water cooling passage. In this scheme, the water cooling liquid can flow in series between the drive motor heat exchange unit 8 and the radiator 33 as needed, achieving temperature control of the drive motor heat exchange unit 8 and recovering waste heat from the radiator 33.

[0049] In this application, the inlet end of the compressor 1 is connected with a gas-liquid separation tank 11. The separation tank 11 can buffer the high-temperature and high-pressure refrigerant from the upstream side, avoiding direct impact of the refrigerant on the cylinder body of the compressor 1, and prolonging the service life of the compressor 1. The inlet end of the gas-liquid separation tank 11 is connected with a low-pressure side filling port 12, which can fill the refrigerant in the refrigerant circulation pipeline as needed, or perform pipeline maintenance.

[0050] The above disclosure is merely the preferred embodiments of the present application, and is not intended to limit the scope of patent application of the present application. Any equivalent technical changes made according to the content of the specification and drawings of the present application shall be included in the scope of patent application of the present application.

[0051] The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments.

[0052] Although the present application is described through embodiments, it is understood by those skilled in the art that there are many modifications and variations of the present application without departing from the spirit of the present application, and it is intended that the appended embodiments include these modifications and variations without departing from the present application.

Claims

1. A multifunctional triangular circulation heat pump integrated system, characterized in that, The multifunctional triangular circulation heat pump integrated system includes: First refrigerant circuit; Second refrigerant circuit; A heat pump module, comprising: a compressor, a valve island mounted on the compressor, a first check valve, a second check valve, a reflux expansion valve, a third expansion valve, a gas-liquid separator, and a waste heat recovery heat exchanger; the waste heat recovery heat exchanger internally includes a refrigerant passage and a water-cooled passage thermally coupled to each other, with a water-cooled heat exchange inlet and a water-cooled heat exchange outlet respectively connected to both ends of the water-cooled passage; the valve island includes an internally perforated flow channel mechanism for refrigerant flow, comprising the first check valve, the second check valve, the reflux expansion valve, the third expansion valve, and the gas-liquid separator. The gas-liquid separator and the refrigerant passage are respectively connected to the flow channel mechanism; the flow channel mechanism includes a return circuit for connecting the exhaust port of the compressor to the return expansion valve; the valve island also includes a first external interface, a second external interface, a third external interface, and a fourth external interface, the first external interface being connected to the first check valve through the valve island, the second external interface being connected to the second check valve through the valve island, the third external interface being connected to the third expansion valve through the valve island, and the fourth external interface being connected to the separation inlet of the gas-liquid separator through the valve island; The first external interface and the third external interface are connected in series via a first refrigerant circuit outside the valve island, consisting of a first condenser heat exchange unit, a first expansion valve, and at least one functional element with heat exchange function; the refrigerant can flow sequentially through the first external interface, the first condenser heat exchange unit, the first expansion valve, and at least one of the functional elements with heat exchange function before returning to the third external interface. The second external interface and the fourth external interface are connected in series via a second refrigerant circuit outside the valve island, consisting of a second condenser heat exchange unit, a second expansion valve, and an evaporator heat exchange unit. The refrigerant can flow sequentially through the second external interface, the second condenser heat exchange unit, the second expansion valve, and the evaporator heat exchange unit before returning to the fourth external interface.

2. The multifunctional triangular cycle heat pump integrated system according to claim 1, characterized in that: The first external interface and the second external interface are located on the same surface of the valve island, while the third external interface and the fourth external interface are located on separate surfaces that are different from the first external interface and the second external interface.

3. The multifunctional triangular circulation heat pump integrated system according to claim 2, characterized in that: The water-cooled heat exchange inlet and the water-cooled heat exchange outlet are arranged in a first direction, and the first external interface and the second external interface are arranged in a second direction away from the first direction.

4. The multifunctional triangular cycle heat pump integrated system according to claim 3, characterized in that: The third external interface and the fourth external interface are oriented in a direction perpendicular to the first direction and the second direction.

5. The multifunctional triangular circulation heat pump integrated system according to claim 1, characterized in that: The compressor has a preset center of mass, and the center of mass of the valve island, the first check valve, the second check valve, the reflux expansion valve, the third expansion valve, the gas-liquid separator, and the waste heat recovery heat exchanger is close to or located on the vertical plane of the preset center of mass.

6. The multifunctional triangular cycle heat pump integrated system according to claim 1, characterized in that: The refrigerant passage is connected to a refrigerant heat exchange inlet and a refrigerant heat exchange outlet at both ends. The flow channel mechanism includes a first channel, a second channel, a third channel, a fourth channel, a fifth channel, and a sixth channel. The compressor's exhaust port is connected to the first check valve through the first channel. The compressor's exhaust port is connected to the second check valve through the second channel. The compressor's exhaust port is connected to the reflux expansion valve through the third channel. The reflux expansion valve is connected to the separation inlet of the gas-liquid separator through the fourth channel. The separation outlet of the gas-liquid separator is directly connected to the compressor's suction port. The third expansion valve is connected to the refrigerant heat exchange inlet through the fifth channel. The refrigerant heat exchange inlet is connected to the separation inlet of the gas-liquid separator through the sixth channel.

7. The multifunctional triangular cycle heat pump integrated system according to claim 1, characterized in that: The functional component with heat exchange function includes a battery heat exchange unit.

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