A heat pump system

Abstract

The utility model discloses a kind of heat pump systems, including heat pump assembly, heat pump assembly and switching component, heat pump assembly includes compressor and gas-liquid separator;Heat exchange component includes internal heat exchanger and external heat exchanger, internal heat exchanger and external heat exchanger are connected by two-way expansion valve;Switching component includes two electrically-controlled three-way valves;The output end of compressor and the input end of gas-liquid separator are respectively communicated with the two sides of gear shifting circuit, internal heat exchanger and external heat exchanger are respectively communicated with the first interface of two electrically-controlled three-way valves;Or, the output end of compressor and the input end of gas-liquid separator are respectively communicated with the first interface of two electrically-controlled three-way valves, internal heat exchanger and external heat exchanger are respectively communicated with the two sides of gear shifting circuit.By setting two electrically-controlled three-way valves, the stability of heat pump system is improved, gear shifting circuit has two kinds of topological structures, reduces installation requirement, improves the flexibility of electrically-controlled three-way valve installation connection.

Description

Technical Field

[0001] This utility model relates to the technical field of thermal management systems for new energy vehicles, and in particular to a heat pump system. Background Technology

[0002] Heat pump systems are key thermal control components in new energy vehicles, primarily achieving cooling or heating by controlling the flow of refrigerant output from the compressor. To achieve this switching between cooling and heating, heat pump systems not only require multi-way valves but also the installation of piping for both cooling and heating, resulting in complex wiring and demanding installation requirements. Utility Model Content

[0003] The purpose of this invention is to provide a heat pump system that is highly stable and has flexible wiring.

[0004] To achieve this objective, the present invention adopts the following technical solution: a heat pump system, comprising a heat pump assembly, a heat pump component, and a switching assembly; the heat pump assembly includes a compressor and a gas-liquid separator, the input end of the compressor and the output end of the gas-liquid separator being connected; the heat exchange assembly includes an internal heat exchanger and an external heat exchanger, one end of the internal heat exchanger and one end of the external heat exchanger being connected via a bidirectional expansion valve; the switching assembly includes two electrically controlled three-way valves, each having a first interface and two second interfaces, the second interfaces of the two electrically controlled three-way valves being connected in pairs to form a switching circuit, the first interface being selectively connected to the switching circuit. One side of the shift circuit is connected, and the first ports of the two electrically controlled three-way valves are respectively connected to both sides of the shift circuit; wherein, the output end of the compressor and the input end of the gas-liquid separator are respectively connected to both sides of the shift circuit, and the other end of the internal heat exchanger and the other end of the external heat exchanger are respectively connected to the first ports of the two electrically controlled three-way valves; or, the output end of the compressor and the input end of the gas-liquid separator are respectively connected to the first ports of the two electrically controlled three-way valves, and the other end of the internal heat exchanger and the other end of the external heat exchanger are respectively connected to both sides of the shift circuit.

[0005] Preferably, the switching assembly further includes a valve island, in which two electrically controlled three-way valves are arranged in parallel and installed in the same valve island, and the valve island is arranged laterally.

[0006] Preferably, the other end of the internal heat exchanger and the other end of the external heat exchanger are respectively connected to the first interface of the two electrically controlled three-way valves. The shifting circuit includes two refrigerant channels, and both ends of each refrigerant channel are connected to the two second interfaces on the same side of the two electrically controlled three-way valves. The output end of the compressor is selectively connected to the two first interfaces and one of the refrigerant channels on one side of the shifting circuit. The input end of the gas-liquid separator is selectively connected to the two first interfaces and one of the refrigerant channels on the other side of the shifting circuit.

[0007] Preferably, the switching assembly further includes a valve island, in which two electrically controlled three-way valves are arranged in parallel and installed in the same valve island, and the valve island is arranged longitudinally.

[0008] Preferably, the output end of the compressor and the input end of the gas-liquid separator are respectively connected to the first interfaces of the two electrically controlled three-way valves. The shifting circuit includes two refrigerant channels, and both ends of each refrigerant channel are connected to the two second interfaces on the same side of the two electrically controlled three-way valves. The other end of the internal heat exchanger is selectively connected to the two first interfaces and one of the refrigerant channels on one side of the shifting circuit. The other end of the external heat exchanger is selectively connected to the two first interfaces and one of the refrigerant channels on the other side of the shifting circuit.

[0009] Preferably, a fan is provided on one side of the external heat exchanger, and the fan is positioned towards the external heat exchanger.

[0010] Preferably, a blower is provided on one side of the internal heat exchanger, and the air inlet of the blower is positioned facing the internal heat exchanger.

[0011] Preferably, the heat pump system further includes a heater connected to the internal heat exchanger.

[0012] Preferably, the heat pump system further includes two temperature and pressure sensors, which are respectively located at both ends of the compressor.

[0013] The beneficial effects of this invention are as follows: When the heat pump system is cooling, the electrically controlled three-way valve connects the output end of the external heat exchanger and the compressor, and simultaneously connects the input end of the gas-liquid separator and the internal heat exchanger, allowing the refrigerant to enter the internal heat exchanger for cooling after heat exchange in the external heat exchanger. When the heat pump system is heating, the electrically controlled three-way valve connects the output end of the internal heat exchanger and the compressor, and simultaneously connects the input end of the gas-liquid separator and the external heat exchanger, allowing the high-temperature refrigerant to directly enter the internal heat exchanger for heating. By setting two electrically controlled three-way valves to replace the traditional four-way valve for controlling the switching between cooling and heating, the stability of the heat pump system is effectively improved. The two electrically controlled three-way valves are connected in parallel to form a switching circuit, which has two topologies. Users can set a suitable wiring method according to actual needs, reducing installation requirements and improving the flexibility of the installation and connection of the electrically controlled three-way valves. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the heat pump system according to the first embodiment of this utility model;

[0015] Figure 2 This is a schematic diagram of the refrigeration system of the heat pump system according to the first embodiment of this utility model;

[0016] Figure 3 This is a schematic diagram of the heat pump system according to the first embodiment of this utility model;

[0017] Figure 4 This is a connection diagram of the electrically controlled three-way valve according to the first embodiment of this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the heat pump system according to the second embodiment of the present invention;

[0019] Figure 6 This is a schematic diagram of the refrigeration system of the heat pump system according to the second embodiment of this utility model;

[0020] Figure 7 This is a schematic diagram of the heat pump system of the second embodiment of this utility model;

[0021] Figure 8 This is a connection diagram of the electrically controlled three-way valve according to the second embodiment of this utility model.

[0022] In the diagram: 100, compressor; 200, gas-liquid separator; 300, internal heat exchanger; 310, blower; 320, heater; 330, two-way expansion valve; 400, external heat exchanger; 410, fan; 500, switching assembly; 510, electrically controlled three-way valve; 520, valve island; 600, temperature and pressure sensor. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0024] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0027] Reference Figures 1 to 8As shown, a heat pump system according to an embodiment of this application includes a heat pump assembly, a heat exchange assembly, and a switching assembly 500. The heat pump assembly includes a compressor 100 (Comp) and a gas-liquid separator 200 (Accu), with the input end of the compressor 100 connected to the output end of the gas-liquid separator 200. The heat exchange assembly includes an internal heat exchanger 300 (IHEX) and an external heat exchanger 400 (OHEX). The internal heat exchanger 300 is installed in the driver's cab or battery pack of the vehicle and is used to cool or heat the driver's cab or battery pack. One end of the internal heat exchanger 300 and one end of the external heat exchanger 400 are connected through a two-way expansion valve 330 (EXV). The external heat exchanger 400 is in communication with the outside air, and the refrigerant in the external heat exchanger 400 can exchange heat with the air.

[0028] The switching assembly 500 includes two electrically controlled three-way valves 510 (3WV1, 3WV2). Each electrically controlled three-way valve 510 has a first port and two second ports. The second ports of the two electrically controlled three-way valves 510 are connected in pairs to form a shift circuit. The first port is selectively connected to one side of the shift circuit, and the first ports of the two electrically controlled three-way valves 510 are respectively connected to both sides of the shift circuit.

[0029] The output end of the compressor 100 and the input end of the gas-liquid separator 200 are respectively connected to both sides of the shift circuit, and the other end of the internal heat exchanger 300 and the other end of the external heat exchanger 400 are respectively connected to the first interface of the two electrically controlled three-way valves 510. Specifically, when the electronically controlled three-way valve 510 controls the shift circuit to connect the output end of the compressor 100 and the first interface to the external heat exchanger 400, and the shift circuit to connect the input end of the gas-liquid separator 200 and the first interface to the internal heat exchanger 300, the compressor 100, external heat exchanger 400, bidirectional expansion valve 330, internal heat exchanger 300, and gas-liquid separator 200 are connected end to end in sequence, and the heat pump system starts cooling; when the electronically controlled three-way valve 510 controls the shift circuit to connect the input end of the gas-liquid separator 200 and the first interface to the external heat exchanger 400, and the shift circuit to connect the output end of the compressor 100 and the first interface to the internal heat exchanger 300, the compressor 100, internal heat exchanger 300, bidirectional expansion valve 330, external heat exchanger 400, and gas-liquid separator 200 are connected end to end in sequence, the heat pump system starts heating.

[0030] Alternatively, the output end of the compressor 100 and the input end of the gas-liquid separator 200 are respectively connected to the first interface of the two electrically controlled three-way valves 510, and the other end of the internal heat exchanger 300 and the other end of the external heat exchanger 400 are respectively connected to both sides of the shift circuit. Specifically, when the electronically controlled three-way valve 510 controls the shifting circuit to connect the side connected to the internal heat exchanger 300 and the first interface connected to the output end of the compressor 100, and the shifting circuit to connect the side connected to the external heat exchanger 400 and the first interface connected to the input end of the gas-liquid separator 200, the compressor 100, internal heat exchanger 300, bidirectional expansion valve 330, external heat exchanger 400 and gas-liquid separator 200 are connected end to end in sequence, and the heat pump system starts heating; when the electronically controlled three-way valve 510 controls the shifting circuit to connect the side connected to the external heat exchanger 400 and the first interface connected to the output end of the compressor 100, and the shifting circuit to connect the side connected to the internal heat exchanger 300 and the first interface connected to the input end of the gas-liquid separator 200, the compressor 100, external heat exchanger 400, bidirectional expansion valve 330, internal heat exchanger 300 and gas-liquid separator 200 are connected end to end in sequence, and the heat pump system starts cooling.

[0031] It should be noted that in this application, the electrically controlled three-way valve 510 is a piston-type two-position three-way valve. The three-way valve has one second port, one first port, and another second port arranged sequentially on the side wall along the length direction. Both the first port and the second port are multiple small hole structures arranged circumferentially along the three-way valve. By axially moving the piston, one of the first port and one of the two second ports can be selectively connected. At this time, the second port that is not connected to the first port acts as a channel.

[0032] Understandably, when the heat pump system is cooling, the electrically controlled three-way valve 510 connects the output ends of the external heat exchanger 400 and the compressor 100, and simultaneously connects the input end of the gas-liquid separator 200 and the internal heat exchanger 300, so that the refrigerant enters the internal heat exchanger for cooling after heat exchange in the external heat exchanger 400; when the heat pump system is heating, the electrically controlled three-way valve 510 connects the output ends of the internal heat exchanger 300 and the compressor 100, and simultaneously connects the input end of the gas-liquid separator 200 and the external heat exchanger 400, so that the high-temperature refrigerant directly enters the internal heat exchanger for heating.

[0033] By setting two electrically controlled three-way valves 510 to replace the traditional four-way valve for controlling the switching between hot and cold, the stability of the heat pump system is effectively improved. The two electrically controlled three-way valves 510 are connected in parallel to form a shifting circuit. The shifting circuit has two topologies, and users can set the appropriate wiring method according to actual needs, reducing installation requirements and improving the flexibility of the installation and connection of the electrically controlled three-way valves 510.

[0034] The two topologies are explained in detail below:

[0035] Example 1

[0036] Reference Figures 1 to 3 As shown, it can be understood that the switching component 500 also includes a valve island 520, with two electrically controlled three-way valves 510 arranged in parallel and installed in the same valve island 520. The valve island 520 is arranged laterally, which is the X direction in the figure.

[0037] By setting a transverse valve island 520, two electrically controlled three-way valves 510 are arranged laterally at intervals, reducing the longitudinal (Y direction in the figure) dimension of the switching component 500 and facilitating the connection of the heat exchange components.

[0038] Reference Figure 4 As shown, it can be understood that the other end of the internal heat exchanger 300 (i.e., the end of the internal heat exchanger 300 away from the bidirectional expansion valve 330) and the other end of the external heat exchanger 400 (i.e., the end of the external heat exchanger 400 away from the bidirectional expansion valve 330) are respectively connected to the first interface of the two electrically controlled three-way valves 510. The shifting circuit includes two refrigerant channels, which are the channel structures inside the valve island 520. Both ends of each refrigerant channel are connected to the two second interfaces on the same side of the two electrically controlled three-way valves 510. The output end of the compressor 100 is selectively connected to the two first interfaces on one side of the shifting circuit and one of the refrigerant channels. The input end of the gas-liquid separator 200 is selectively connected to the two first interfaces on the other side of the shifting circuit and one of the refrigerant channels.

[0039] Specifically, the output end of the compressor 100 can be connected to the first interface of either of the two electrically controlled three-way valves 510 on the side closest to the compressor 100. The output end of the compressor 100 can also be connected to the refrigerant passage of either of the two electrically controlled three-way valves 510 on the side closest to the compressor 100. At the same time, the input end of the gas-liquid separator 200 can be connected to the first interface of either of the two electrically controlled three-way valves 510 on the side furthest from the compressor 100. The input end of the gas-liquid separator 200 can also be connected to the refrigerant passage of either of the two electrically controlled three-way valves 510 on the side furthest from the compressor 100.

[0040] By setting up a refrigerant passage located within the valve island 520, the piping structure between the two electrically controlled three-way valves 510 can be eliminated, reducing the refrigerant charge and thus lowering the carbon emissions of the heat pump system, improving its environmental friendliness. The output end of the compressor 100 and the input end of the gas-liquid separator 200 each have three connection options, giving the heat pump system nine connection options in Embodiment 1. This further enhances the flexibility of the electrically controlled three-way valve 510 installation and connection, and provides safety redundancy for users in case of blockage at the first interface or in the refrigerant passage, improving the fault tolerance of the heat pump system.

[0041] Example 2

[0042] Reference Figures 5 to 7 As shown, it can be understood that the switching assembly 500 also includes a valve island 520, with two electrically controlled three-way valves 510 arranged in parallel and installed in the same valve island 520, which is arranged longitudinally.

[0043] By setting a longitudinal valve island 520, two electrically controlled three-way valves 510 are arranged longitudinally at intervals, reducing the lateral dimension of the switching assembly 500 and facilitating the connection of the heat pump assembly.

[0044] Referring to Figure 8, it can be understood that the output end of the compressor 100 and the input end of the gas-liquid separator 200 are respectively connected to the first interfaces of the two electrically controlled three-way valves 510. The shifting circuit includes two refrigerant channels, which are the channel structures inside the valve island 520. Both ends of each refrigerant channel are connected to the two second interfaces on the same side of the two electrically controlled three-way valves 510. The other end of the internal heat exchanger 300 is selectively connected to one of the two first interfaces and one of the refrigerant channels on one side of the shifting circuit. The other end of the external heat exchanger 400 is selectively connected to one of the two first interfaces and one of the refrigerant channels on the other side of the shifting circuit.

[0045] Specifically, the end of the internal heat exchanger 300 away from the bidirectional expansion valve 330 can be connected to the first interface of either of the two electrically controlled three-way valves 510 on the side closest to the internal heat exchanger 300. The end of the internal heat exchanger 300 away from the bidirectional expansion valve 330 can also be connected to the refrigerant passage of either of the two electrically controlled three-way valves 510 on the side closest to the internal heat exchanger 300. At the same time, the end of the external heat exchanger 400 away from the bidirectional expansion valve 330 can be connected to the first interface of either of the two electrically controlled three-way valves 510 on the side closest to the internal heat exchanger 300. The end of the external heat exchanger 400 away from the bidirectional expansion valve 330 can also be connected to the refrigerant passage of either of the two electrically controlled three-way valves 510 on the side closest to the internal heat exchanger 300.

[0046] By setting up a refrigerant channel located within the valve island 520, the piping structure between the two electrically controlled three-way valves 510 can be eliminated, reducing the refrigerant charge and thus lowering the carbon emissions of the heat pump system, improving its environmental friendliness. The internal heat exchanger 300 and the external heat exchanger 400 each have three connection options, giving the heat pump system nine connection options in this embodiment. This further enhances the flexibility of the electrically controlled three-way valves 510 during installation and connection, and provides safety redundancy for users in case of blockage in the first interface or refrigerant channel, improving the fault tolerance of the heat pump system.

[0047] Reference Figure 1 and Figure 5As shown, it can be understood that a fan 410 (Fan) is provided on one side of the external heat exchanger, and the fan 410 is positioned towards the external heat exchanger 400.

[0048] By incorporating fan 410, the airflow efficiency on the surface of external heat exchanger 400 can be improved, thereby increasing the heat exchange efficiency of external heat exchanger 400.

[0049] Furthermore, a blower 310 is provided on one side of the internal heat exchanger 300, with the air inlet of the blower 310 facing the internal heat exchanger 300.

[0050] By setting up a blower 310, the blower 310 can quickly guide the heat or cold air from the surface of the internal heat exchanger 300 to the cab, thereby improving the heating and cooling efficiency of the heat pump system.

[0051] Furthermore, the heat pump system also includes a heater 320 (APTC), which is connected to the internal heat exchanger 300.

[0052] By installing heater 320, the refrigerant in the internal heat exchanger 300 can be heated, further improving the heating efficiency of the heat pump system and ensuring the normal operation of the heat pump system in extremely cold weather.

[0053] Reference Figure 1 and Figure 3 As shown, it can be understood that the heat pump system also includes two temperature and pressure sensors 600, which are respectively located at both ends of the compressor 100.

[0054] By setting two temperature and pressure sensors 600, the two temperature and pressure sensors 600 work together to detect the intake pressure, intake temperature, exhaust pressure and exhaust temperature of the compressor 100, and then calculate the compressor 100 pressure ratio, compression ratio, etc., which facilitates the subsequent temperature adjustment of the vehicle system and improves the controllability of the heat pump system.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A heat pump system, characterized in that, include: A heat pump assembly includes a compressor (100) and a gas-liquid separator (200), wherein the input end of the compressor (100) and the output end of the gas-liquid separator (200) are connected; The heat exchange assembly includes an internal heat exchanger (300) and an external heat exchanger (400), one end of the internal heat exchanger (300) and one end of the external heat exchanger (400) are connected by a two-way expansion valve (330). The switching assembly (500) includes two electrically controlled three-way valves (510), each having a first port and two second ports. The second ports of the two electrically controlled three-way valves (510) are connected in pairs to form a shift circuit. The first port is selectively connected to one side of the shift circuit, and the first ports of the two electrically controlled three-way valves (510) are respectively connected to both sides of the shift circuit. The output end of the compressor (100) and the input end of the gas-liquid separator (200) are respectively connected to both sides of the shift circuit, and the other end of the internal heat exchanger (300) and the other end of the external heat exchanger (400) are respectively connected to the first interface of the two electrically controlled three-way valves (510). Alternatively, the output end of the compressor (100) and the input end of the gas-liquid separator (200) are respectively connected to the first interface of the two electrically controlled three-way valves (510), and the other end of the internal heat exchanger (300) and the other end of the external heat exchanger (400) are respectively connected to both sides of the shifting circuit.

2. The heat pump system according to claim 1, characterized in that, The switching assembly (500) also includes a valve island (520), in which two electrically controlled three-way valves (510) are arranged in parallel and installed in the same valve island (520), which is arranged laterally.

3. The heat pump system according to claim 2, characterized in that, The other end of the internal heat exchanger (300) and the other end of the external heat exchanger (400) are respectively connected to the first interfaces of the two electrically controlled three-way valves (510). The shifting circuit includes two refrigerant channels. Both ends of each refrigerant channel are connected to the two second interfaces on the same side of the two electrically controlled three-way valves (510). The output end of the compressor (100) is selectively connected to the two first interfaces and one of the refrigerant channels on one side of the shifting circuit. The input end of the gas-liquid separator (200) is selectively connected to the two first interfaces and one of the refrigerant channels on the other side of the shifting circuit.

4. The heat pump system according to claim 1, characterized in that, The switching assembly (500) also includes a valve island (520), in which two electrically controlled three-way valves (510) are arranged in parallel and installed in the same valve island (520), which is arranged longitudinally.

5. The heat pump system according to claim 4, characterized in that, The output end of the compressor (100) and the input end of the gas-liquid separator (200) are respectively connected to the first interfaces of the two electrically controlled three-way valves (510). The shifting circuit includes two refrigerant channels. Both ends of each refrigerant channel are connected to the two second interfaces on the same side of the two electrically controlled three-way valves (510). The other end of the internal heat exchanger (300) is selectively connected to the two first interfaces and one of the refrigerant channels on one side of the shifting circuit. The other end of the external heat exchanger (400) is selectively connected to the two first interfaces and one of the refrigerant channels on the other side of the shifting circuit.

6. The heat pump system according to any one of claims 1-5, characterized in that, A fan (410) is provided on one side of the external heat exchanger, and the fan (410) is positioned facing the external heat exchanger (400).

7. The heat pump system according to any one of claims 1-5, characterized in that, A blower (310) is provided on one side of the internal heat exchanger (300), and the air inlet of the blower (310) is arranged facing the internal heat exchanger (300).

8. The heat pump system according to any one of claims 1-5, characterized in that, The heat pump system also includes a heater (320) connected to the internal heat exchanger (300).

9. The heat pump system according to any one of claims 1-5, characterized in that, The heat pump system also includes two temperature and pressure sensors (600), which are respectively located at both ends of the compressor (100).

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