Multi-way reversing valve and heat pump system

Abstract

The present invention provides a multi-way reversing valve and a heat pump system, which relates to the technical field of heat pump systems. The multi-way reversing valve includes: a valve body, a valve core, an elastic member and a pilot valve; the valve core is movably installed inside the valve body, and the inside of the valve body is divided to form a plurality of chambers; the valve body is provided with a plurality of interfaces, and the plurality of interfaces are respectively connected to the corresponding chambers; the valve core has a first position and a second position for switching the on-off state of the plurality of interfaces and the chambers. The integrated design of the multi-way reversing valve with multiple chambers and multiple interfaces is realized, the cost is reduced, and the flow resistance of the system is reduced. The elastic member can be used to maintain the valve core in the second position, thereby realizing a flow path state. When the internal pressure of the first chamber is greater than the internal pressure of the second chamber, the valve core can overcome the elastic force of the elastic member and switch from the second position to the first position, thereby realizing another flow path state. The pressure difference is used to switch the positions, the power consumption is reduced, and the weight is reduced. The valve core is particularly suitable for the conversion between the cooling mode and the heating mode of the heat pump system.

Description

Technical Field

[0001] The invention relates to the technical field of heat pump systems, and in particular to a multi-way reversing valve and a heat pump system. Background Art

[0002] Heat pump systems are usually equipped with multiple refrigerant circuits, and the on-off relationship of the refrigerant circuits is switched to adjust the system working mode to meet the working conditions of cooling, dehumidification and heating. In complex refrigerant circuits, multiple refrigerant stop valves and one-way valves are usually required to be used in conjunction to achieve the on-off switching of each circuit, which will lead to high costs for system components. Each stop valve is driven by electromagnetic force, and the power consumption of the system operation is relatively high. Summary of the invention

[0003] The object of the present invention is to provide a multi-way reversing valve and a heat pump system to realize the integrated design of the multi-channel reversing valve and reduce the energy consumption of its station switching.

[0004] In the first aspect, the multi-way reversing valve provided by the present invention comprises: a valve body, a valve core, an elastic member and a pilot valve; the valve core is movably installed inside the valve body, and the inside of the valve body is divided into a plurality of chambers; the valve body is provided with a plurality of interfaces, and the plurality of interfaces are respectively connected to the corresponding chambers; the valve core has a first position and a second position for switching the on-off state of the plurality of interfaces and the chambers, the elastic member is installed in the valve body and acts on the valve core, so that the valve core has a tendency to switch from the first position to the second position; the plurality of chambers at least comprise: a first chamber, a second chamber and a third chamber; the pilot valve is connected between the second chamber and the third chamber, and is used to regulate the on-off state of the second chamber and the third chamber; the first chamber is located at one end of the valve core, and the third chamber is located at the other end of the valve core, and the direction from the first chamber to the third chamber is opposite to the direction in which the elastic member acts on the valve core; when the second chamber is fluidly connected to the third chamber and the internal pressure of the first chamber is greater than the internal pressure of the second chamber, the valve core overcomes the elastic force of the elastic member and switches from the second position to the first position.

[0005] Furthermore, a fourth chamber is formed between the valve body and the valve core; in the first working position, the first chamber is connected to the fourth chamber.

[0006] Furthermore, the valve core is provided with a bypass hole connecting the first chamber and the fourth chamber, and a one-way diaphragm is installed in the bypass hole; when the internal pressure of the fourth chamber is greater than the internal pressure of the first chamber, the one-way diaphragm opens to connect the first chamber and the fourth chamber; when the internal pressure of the fourth chamber is less than or equal to the internal pressure of the first chamber, the one-way diaphragm is closed to isolate the first chamber and the fourth chamber.

[0007] In combination with the first aspect, the present invention provides a first possible implementation of the first aspect, wherein a fifth chamber is formed between the valve body and the valve core; and the valve core is provided with a first guide channel extending from the fourth chamber to connect to the fifth chamber.

[0008] Furthermore, a sixth chamber is formed between the valve body and the valve core; the fifth chamber, the sixth chamber, the fourth chamber and the first chamber are arranged in sequence along the direction from the first station to the second station; a plurality of interfaces include a first interface, a second interface, a third interface and a fourth interface arranged on the valve body, and the first interface, the second interface, the third interface and the fourth interface are arranged in sequence at intervals along the direction from the first chamber to the fifth chamber; at the first station, the first interface is connected to the first chamber, the second interface and the third interface are both connected to the sixth chamber, and the fourth interface is connected to the fifth chamber; at the second station, the first interface is connected to the fourth chamber, the second interface is connected to the sixth chamber, and the third interface and the fourth interface are both connected to the fifth chamber.

[0009] Furthermore, a seventh chamber is formed between the valve body and the valve core, and the fifth chamber is located between the sixth chamber and the seventh chamber; the valve body is provided with a fifth interface, the fifth interface is connected to the fifth chamber at the first station, and the fifth interface is connected to the seventh chamber at the second station.

[0010] Furthermore, an eighth chamber is formed between the valve body and the valve core; the valve body is provided with a sixth interface and a seventh interface, and the fifth interface, the sixth interface and the seventh interface are arranged in sequence; in the first workstation, the sixth interface is connected to the seventh chamber, and the seventh interface is connected to the eighth chamber; in the second workstation, the sixth interface and the seventh interface are both connected to the eighth chamber.

[0011] Furthermore, the valve body is provided with an eighth interface; the eighth interface is communicated with the eighth chamber at the first station, and the eighth interface is communicated with the second chamber at the second station.

[0012] Furthermore, the plurality of interfaces include a ninth interface which is arranged on the valve body and communicated with the third chamber.

[0013] Furthermore, the valve core is provided with a second flow guiding channel extending from the first chamber to communicate with the second chamber.

[0014] In combination with the first aspect, the present invention provides a second possible implementation of the first aspect, wherein the plurality of chambers further include a fifth chamber, a sixth chamber, and a seventh chamber formed between the valve body and the valve core; the first chamber, the fourth chamber, the fifth chamber, the sixth chamber, the seventh chamber, the second chamber, and the third chamber are arranged in sequence. The plurality of interfaces include a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, and an eighth interface, which are arranged on the valve body and are distributed in sequence along a direction from the first chamber to the third chamber.

[0015] At the first workstation, the first interface is connected to the first chamber, the second interface and the third interface are both connected to the fourth chamber, the fourth interface is connected to the fifth chamber, the fifth interface and the sixth interface are both connected to the seventh chamber, and the seventh interface and the eighth interface are both connected to the second chamber.

[0016] At the second workstation, the first interface and the second interface are both connected to the fourth chamber, the third interface is connected to the fifth chamber, the fourth interface is connected to the sixth chamber, the fifth interface is connected to the seventh chamber, and the sixth interface and the seventh interface are both connected to the second chamber.

[0017] The eighth interface is opened and closed with the third chamber through the pilot valve regulation.

[0018] Furthermore, the valve core extends from the sixth chamber to communicate with the third flow guide channel of the third chamber.

[0019] Furthermore, the valve core extends from the third flow guiding channel to communicate with the fourth flow guiding channel of the second chamber.

[0020] In combination with the first possible implementation manner of the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein the pilot valve has a first valve cavity, a second valve cavity, a third valve cavity, a fourth valve cavity and a fifth valve cavity, and the pilot valve is provided with a first valve port, a second valve port, a third valve port, a fourth valve port, a fifth valve port and a sixth valve port; the first valve port is fluidly connected to the second valve port via a liquid-cooled condensation circuit, the third valve port is fluidly connected to the second interface, the fourth valve port is fluidly connected to the sixth interface, the fifth valve port is fluidly connected to the eighth interface, and the sixth interface is fluidly connected to the ninth interface; when the pilot valve is in a first state, the first valve port and the third valve port are both connected to the second valve cavity, the second valve port and the fourth valve port are both connected to the third valve cavity, the fifth valve port is connected to the fourth valve cavity, and the sixth valve port is connected to the fifth valve cavity; when the pilot valve is in a second state, the first valve port is connected to the first valve cavity, the second valve port, the third valve port and the fourth valve port are all connected to the second valve cavity, and the fifth valve port and the sixth valve port are both connected to the fourth valve cavity.

[0021] In the above possible implementation manner, a buffer pad is installed in the first chamber; and in the second working position, the valve core abuts against the buffer pad.

[0022] In a second aspect, the heat pump system provided by the present invention is equipped with the multi-way reversing valve described in the first aspect.

[0023] The embodiments of the present invention bring about the following beneficial effects: an integrated design of a multi-way reversing valve with multiple chambers and multiple interfaces is realized, the structure is more compact, and the valve core can be maintained in the second position by means of an elastic member, thereby realizing a flow path state. When the internal pressure of the first chamber is greater than the internal pressure of the second chamber, the valve core can overcome the elastic force of the elastic member and switch from the second position to the first position, thereby realizing another flow path state. The pressure difference is used for position switching, thereby reducing the energy consumption of position switching, and is particularly suitable for conversion between cooling mode and heating mode of a heat pump system.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of a first multi-way reversing valve provided in an embodiment of the present invention in a first working position;

[0027] Figure 2 A schematic diagram of a first multi-way reversing valve provided in an embodiment of the present invention in a second working position;

[0028] Figure 3 A schematic diagram of a second multi-way reversing valve provided by an embodiment of the present invention in a first working position;

[0029] Figure 4 A schematic diagram of a second multi-way reversing valve provided by an embodiment of the present invention in a second working position;

[0030] Figure 5 A schematic diagram of a first heat pump system provided by an embodiment of the present invention;

[0031] Figure 6 A schematic diagram of a second heat pump system provided by an embodiment of the present invention;

[0032] Figure 7 A schematic diagram of a third refrigeration mode of a heat pump system provided in an embodiment of the present invention;

[0033] Figure 8 A schematic diagram of a third heat pump system provided by an embodiment of the present invention in a heating state, with an ambient temperature above 0°C and without turning on the rear air-conditioning evaporator;

[0034] Fig. 9 A schematic diagram of a third heat pump system provided by an embodiment of the present invention in a heating state, with an ambient temperature above 0°C and the rear air-conditioning evaporator turned on;

[0035] Fig.10 A schematic diagram of a third heat pump system provided by an embodiment of the present invention in a heating state and with an ambient temperature of -20°C to 0°C;

[0036] Fig.11 A schematic diagram of a third heat pump system provided by an embodiment of the present invention in a heating state with an ambient temperature below -20°C;

[0037] Fig.12 Schematic diagram of the third heat pump system.

[0038] Icons: 01-compressor; 02-battery cooler; 03-liquid-cooled condenser; 04-outdoor condenser; 05-indoor condenser; 06-front air-conditioning evaporator; 07-rear air-conditioning evaporator; 08-first refrigerant stop valve; 09-second refrigerant stop valve; 10-third refrigerant stop valve; 11-fourth refrigerant stop valve; 12-fifth refrigerant stop valve; 13-first one-way valve; 14-second one-way valve; 15-first electronic expansion valve; 16-second electronic expansion valve; 17-third electronic expansion valve; 18-gas-liquid separator; 19-first refrigerant pressure sensor; 20-second refrigerant pressure sensor; 21-refrigerant temperature sensor; 22-refrigerant substrate; 010-first chamber; 020-second chamber; 030-third chamber; 040-fourth chamber; 050-fifth chamber; 060-sixth chamber; 070-seventh chamber; 080-eighth chamber; 10 0-valve body; 101-first interface; 102-second interface; 103-third interface; 104-fourth interface; 105-fifth interface; 106-sixth interface; 107-seventh interface; 108-eighth interface; 109-ninth interface; 110-valve housing; 120-front cover; 130-rear cover; 140-buffer pad; 200-valve core; 201-first guide channel; 202-second guide channel; 203- The third guide channel; 204-the fourth guide channel; 300-elastic part; 400-pilot valve; 401-the first valve port; 402-the second valve port; 403-the third valve port; 404-the fourth valve port; 405-the fifth valve port; 406-the sixth valve port; 410-the first valve cavity; 420-the second valve cavity; 430-the third valve cavity; 440-the fourth valve cavity; 450-the fifth valve cavity; 500-the one-way diaphragm; 600-the filter screen. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are only used to describe the difference in names, and cannot be understood as indicating or implying relative importance. The physical quantities in the formula, if not separately marked, should be understood as basic quantities of the basic units of the International System of Units, or derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] like Figure 1 to Figure 4As shown, the multi-way reversing valve provided by the embodiment of the present invention includes: a valve body 100, a valve core 200, an elastic member 300 and a pilot valve 400; the valve core 200 is movably installed inside the valve body 100, and the inside of the valve body 100 is divided into a plurality of chambers; the valve body 100 is provided with a plurality of interfaces, and the plurality of interfaces are respectively connected with the corresponding chambers; the valve core 200 has a first position and a second position for switching the on-off state of the plurality of interfaces and the chambers, and the elastic member 300 is installed in the valve body 100 and acts on the valve core 200, so that the valve core 200 has a tendency to switch from the first position to the second position; the plurality of chambers at least include: a first chamber 010, a second chamber 02 0 and the third chamber 030; the pilot valve 400 is connected between the second chamber 020 and the third chamber 030 to regulate the on-off of the second chamber 020 and the third chamber 030; the first chamber 010 is located at one end of the valve core 200, and the third chamber 030 is located at the other end of the valve core 200, and the direction from the first chamber 010 to the third chamber 030 is opposite to the direction in which the elastic member 300 acts on the valve core 200; when the second chamber 020 and the third chamber 030 are fluidically connected and the internal pressure of the first chamber 010 is greater than the internal pressure of the second chamber 020, the valve core 200 overcomes the elastic force of the elastic member 300 and switches from the second station to the first station.

[0043] In the multi-way reversing valve, multiple chambers and multiple interfaces are integrated to realize a multi-channel integrated design with a more compact structure. In addition, the elastic member 300 can be used to maintain the valve core 200 in the second position, thereby maintaining a flow path state. When the internal pressure of the first chamber 010 is greater than the internal pressure of the second chamber 020, the valve core 200 overcomes the elastic force of the elastic member 300 and automatically switches from the second position to the first position without the need for an external power source, thereby reducing the energy consumption of position switching, and is particularly suitable for the conversion of cooling mode and heating mode of heat pump systems (including new energy vehicle heat pump systems).

[0044] In an optional embodiment, a fourth chamber 040 is formed between the valve body 100 and the valve core 200; Figure 1 At the left end shown, the first chamber 010 is connected to the fourth chamber 040 .

[0045] The valve body 100 includes: a valve housing 110, a front end cover 120 and a rear end cover 130, the front end cover 120 is connected to one end of the valve housing 110, the rear end cover 130 is connected to the other end of the valve housing 110, the valve core 200 is located between the front end cover 120 and the rear end cover 130, and the valve core 200 is slidably fitted in the valve housing 110.

[0046] See also Figure 1 , Figure 2 , Figure 3 and Figure 4The valve core 200 is provided with a bypass hole connecting the first chamber 010 and the fourth chamber 040, and the bypass hole is installed with a one-way diaphragm 500; when the internal pressure of the fourth chamber 040 is greater than the internal pressure of the first chamber 010, the one-way diaphragm 500 opens to connect the first chamber 010 with the fourth chamber 040; when the internal pressure of the fourth chamber 040 is less than or equal to the internal pressure of the first chamber 010, the one-way diaphragm 500 is closed to isolate the first chamber 010 from the fourth chamber 040.

[0047] In order to avoid the blockage of the bypass hole, a filter screen may be installed at one end of the bypass hole to reduce the adhesion of impurities to the one-way diaphragm 500 .

[0048] In a first alternative embodiment, see Figure 1 and Figure 2 A fifth chamber 050 is formed between the valve body 100 and the valve core 200 ; the valve core 200 is provided with a first guide channel 201 extending from the fourth chamber 040 to communicate with the fifth chamber 050 .

[0049] Furthermore, a sixth chamber 060 is formed between the valve body 100 and the valve core 200; the fifth chamber 050, the sixth chamber 060, the fourth chamber 040 and the first chamber 010 are arranged in sequence along the direction from the first workstation to the second workstation; a plurality of interfaces include a first interface 101, a second interface 102, a third interface 103 and a fourth interface 104 arranged on the valve body 100, and the first interface 101, the second interface 102, the third interface 103 and the fourth interface 104 are arranged in sequence at intervals along the direction from the first chamber 010 to the fifth chamber 050.

[0050] At the first workstation, the first interface 101 is connected to the first chamber 010, the second interface 102 and the third interface 103 are both connected to the sixth chamber 060, and the fourth interface 104 is connected to the fifth chamber 050; at the second workstation, the first interface 101 is connected to the fourth chamber 040, the second interface 102 is connected to the sixth chamber 060, and the third interface 103 and the fourth interface 104 are both connected to the fifth chamber 050.

[0051] Furthermore, a seventh chamber 070 is formed between the valve body 100 and the valve core 200, and the fifth chamber 050 is located between the sixth chamber 060 and the seventh chamber 070; the valve body 100 is provided with a fifth interface 105, and the fifth interface 105 is connected to the fifth chamber 050 at the first workstation, and is connected to the seventh chamber 070 at the second workstation.

[0052] Furthermore, an eighth chamber 080 is formed between the valve body 100 and the valve core 200; the valve body 100 is provided with a sixth interface 106 and a seventh interface 107, and the fifth interface 105, the sixth interface 106 and the seventh interface 107 are arranged in sequence; at the first workstation, the sixth interface 106 is connected to the seventh chamber 070, and the seventh interface 107 is connected to the eighth chamber 080; at the second workstation, the sixth interface 106 and the seventh interface 107 are both connected to the eighth chamber 080.

[0053] Furthermore, the valve body 100 is provided with an eighth interface 108 ; the eighth interface 108 is communicated with the eighth chamber 080 at the first station, and the eighth interface 108 is communicated with the second chamber 020 at the second station.

[0054] Furthermore, the valve core 200 is provided with a second guide channel 202 extending from the first chamber 010 to communicate with the second chamber 020 .

[0055] In addition, the plurality of interfaces include a ninth interface 109 which is disposed on the valve body 100 and communicates with the third chamber 030 .

[0056] For the multi-way reversing valve described in the first embodiment, some of the interfaces can be selected and used as needed in actual applications. As an example of application form, in the cooling mode of the heat pump system, the first interface 101 can be used as a high-pressure interface, the first chamber 010 and the second chamber 020 are connected through the second guide channel 202, and the pilot valve 400 is configured to be in a normally open state to connect the second chamber 020 with the third chamber 030. The first interface 101 is fluidically connected to the ninth interface 109, the flow area from the first chamber 010 to the eighth interface 108 is much larger than the flow area at the one-way diaphragm 500, the internal pressure of the third chamber 030 is greater than the internal pressure of the first chamber 010, and the elastic force of the superimposed elastic member 300 can maintain the valve core 200 in the second position. When switching to the heating state, the pilot valve 400 can be energized briefly. At this time, the eighth interface 108 and the ninth interface 109 are disconnected, and the first chamber 010 is isolated from the second chamber 020. As the high-pressure fluid in the fourth chamber 040 slowly flows into the first chamber 010 through the one-way diaphragm 500, the internal pressure of the first chamber 010 gradually increases until the pressure difference between the first chamber 010 and the third chamber 030 is sufficient to offset the elastic force of the elastic member 300 and the friction resistance of the valve core 200. Under the action of the pressure difference, the valve core 200 can be driven to switch from the second position to the first position.

[0057] In a second alternative embodiment, see Figure 3 and Figure 4, the multiple chambers also include a fifth chamber 050, a sixth chamber 060 and a seventh chamber 070 formed between the valve body 100 and the valve core 200; the first chamber 010, the fourth chamber 040, the fifth chamber 050, the sixth chamber 060, the seventh chamber 070, the second chamber 020 and the third chamber 030 are arranged in sequence; the multiple interfaces include a first interface 101, a second interface 102, a third interface 103, a fourth interface 104, a fifth interface 105, a sixth interface 106, a seventh interface 107 and an eighth interface 108 which are arranged on the valve body 100 and are distributed in sequence along the direction from the first chamber 010 to the third chamber 030; in the first station, the first interface 101 is connected to the first chamber 010, and the fourth station 102 is connected to the fifth chamber 050, and the sixth chamber 060 is connected to the seventh chamber 070. The second interface 102 and the third interface 103 are both connected to the fourth chamber 040, the fourth interface 104 is connected to the fifth chamber 050, the fifth interface 105 and the sixth interface 106 are both connected to the seventh chamber 070, and the seventh interface 107 and the eighth interface 108 are both connected to the second chamber 020; in the second workstation, the first interface 101 and the second interface 102 are both connected to the fourth chamber 040, the third interface 103 is connected to the fifth chamber 050, the fourth interface 104 is connected to the sixth chamber 060, the fifth interface 105 is connected to the seventh chamber 070, and the sixth interface 106 and the seventh interface 107 are both connected to the second chamber 020; the eighth interface 108 is connected and disconnected with the third chamber 030 through the pilot valve 400.

[0058] Furthermore, the valve core 200 extends from the sixth chamber 060 to communicate with the third guide channel 203 of the third chamber 030 .

[0059] Furthermore, a filter screen 600 is installed at one end of the third guide channel 203 communicating with the third chamber 030 .

[0060] Furthermore, the valve core 200 extends from the third guide channel 203 to communicate with the fourth guide channel 204 of the second chamber 020 .

[0061] In the second embodiment, compared with the first embodiment, the ninth interface 109 is cancelled, and a filter screen is preferably installed at one end of the third flow guide channel 203 connected to the third chamber 030. In addition, the valve core 200 can be formed by injection molding of PPS material, and a heat insulation coating can be added to the valve body 100 and the valve core 200 to improve the heat insulation performance between adjacent chambers.

[0062] See also Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11As shown, in the third optional embodiment, the pilot valve 400 has a first valve chamber 410, a second valve chamber 420, a third valve chamber 430, a fourth valve chamber 440 and a fifth valve chamber 450, and the pilot valve 400 is provided with a first valve port 401, a second valve port 402, a third valve port 403, a fourth valve port 404, a fifth valve port 405 and a sixth valve port 406; the first valve port 401 is fluidically connected to the second valve port 402 via a liquid-cooled condensation circuit, the third valve port 403 is fluidically connected to the second interface 102, the fourth valve port 404 is fluidically connected to the sixth interface 106, the fifth valve port 405 is fluidically connected to the eighth interface 108, and the sixth interface 106 is fluidically connected to the ninth interface 109.

[0063] When the pilot valve 400 is in the first state, the first valve port 401 and the third valve port 403 are both connected to the second valve cavity 420, the second valve port 402 and the fourth valve port 404 are both connected to the third valve cavity 430, the fifth valve port 405 is connected to the fourth valve cavity 440, and the sixth valve port 406 is connected to the fifth valve cavity 450; when the pilot valve 400 is in the second state, the first valve port 401 is connected to the first valve cavity 410, the second valve port 402, the third valve port 403 and the fourth valve port 404 are all connected to the second valve cavity 420, and the fifth valve port 405 and the sixth valve port 406 are all connected to the fourth valve cavity 440.

[0064] In this embodiment, the inlet end of the compressor 01 is fluidly connected to the refrigerant substrate 22, the first interface 101 and the indoor condenser 05 are respectively fluidly connected to the outlet end of the compressor 01, and the indoor condenser 05 is fluidly connected to the third interface 103; the fourth interface 104 is fluidly connected to the inlet end of the outdoor condenser 04, and the outlet end of the outdoor condenser 04 is fluidly connected to the seventh interface 107; the fifth interface 105, the sixth interface 106 and the eighth interface 108 are respectively fluidly connected to the refrigerant substrate 22; the refrigerant substrate 22 is fluidly connected to the inlet end of the front air-conditioning evaporator 06, the ninth interface 109 is fluidly connected to the rear air-conditioning evaporator 07, and the outlet end of the front air-conditioning evaporator 06 and the outlet end of the rear air-conditioning evaporator 07 are respectively fluidly connected to the inlet end of the refrigerant substrate 22.

[0065] In the above embodiment, a buffer pad 140 may be installed in the first chamber 010; the valve core 200 abuts against the buffer pad 140 at the second position to reduce the collision impact and ensure that the first chamber 010 has a minimum volume.

[0066] The heat pump system provided in an embodiment of the present invention is configured with a multi-way reversing valve described in any of the above-mentioned embodiments. The heat pump system can be used to achieve functions such as cooling, heating and dehumidification. It has the technical effects of the above-mentioned multi-way reversing valve and will not be repeated here.

[0067] like Figure 5 and Figure 6As shown, in an optional embodiment, the heat pump system includes: a refrigeration circuit and a heating circuit; the refrigeration circuit includes: a compressor 01, an indoor condenser 05, an outdoor condenser 04, a third electronic expansion valve 17, a front air-conditioning evaporator 06 and a gas-liquid separator 18, which are fluidly connected in sequence from beginning to end; the heating circuit includes: a compressor 01, an indoor condenser 05, a liquid-cooled condenser 03, a second electronic expansion valve 16, a battery cooler 02 and a gas-liquid separator 18, which are fluidly connected in sequence from beginning to end; the heating circuit also includes: a compressor 01, an indoor condenser 05, a liquid-cooled condenser 03, a first electronic expansion valve 15, a rear air-conditioning evaporator 07 and a gas-liquid separator 18, which are fluidly connected in sequence from beginning to end. A first refrigerant pressure sensor 19 is installed at the inlet end of the compressor 01, and a second refrigerant pressure sensor 20 is installed at the outlet end of the compressor 01.

[0068] See also Figure 1 , Figure 2 and Figure 5 As shown, in the first feasible heat pump system, the inlet end of the indoor condenser 05 is connected to the first interface 101, the outlet end of the indoor condenser 05 is connected to the third interface 103, the inlet end of the liquid-cooled condenser 03 is connected to the second interface 102, the inlet end of the outdoor condenser 04 is connected to the fourth interface 104, the inlet end of the gas-liquid separator 18 is connected to the fifth interface 105, the outlet end of the outdoor condenser 04 is connected to the seventh interface 107, the seventh interface 107, the second one-way valve 14, the sixth interface 106, the third electronic expansion valve 17 and the front air-conditioning evaporator 06 are fluidly connected in sequence. The liquid-cooled condenser 03, the sixth interface 106, the first electronic expansion valve 15, the eighth interface 108, the ninth interface 109 and the rear air-conditioning evaporator 07 are fluidly connected in sequence.

[0069] Among them, the pipeline connecting the second interface 102 and the fourth interface 104 is installed with a first refrigerant stop valve 08, the pipeline connecting the fourth interface 104 and the fifth interface 105 is installed with a second refrigerant stop valve 09, the pipeline connecting the liquid-cooled condenser 03 and the sixth interface 106 is installed with a third refrigerant stop valve 10, the pipeline connecting the inlet and outlet ends of the indoor condenser 05 is installed with a fourth refrigerant stop valve 11, and the pipeline connecting the eighth interface 108 and the ninth interface 109 is installed with a fifth refrigerant stop valve 12. The first electronic expansion valve 15, the second electronic expansion valve 16, the third electronic expansion valve 17 and the sixth interface 106 are connected through a four-way joint, and a refrigerant temperature sensor 21 is installed between the four-way joint and the sixth interface 106. The pipeline connecting the seventh interface 107 and the eighth interface 108 is installed with a first one-way valve 13 that conducts one-way from the eighth interface 108 to the seventh interface 107.

[0070] See also Figure 3 , Figure 4 and Figure 6As shown, in the second feasible heat pump system, the inlet end of the indoor condenser 05 is connected to the fourth interface 104, the outlet end of the indoor condenser 05 is connected to the sixth interface 106, the inlet end of the liquid-cooled condenser 03 is connected to the fifth interface 105, the inlet end of the outdoor condenser 04 is connected to the seventh interface 107, the inlet end of the gas-liquid separator 18 is connected to the eighth interface 108, the outlet end of the outdoor condenser 04 is connected to the second interface 102, the second interface 102, the second one-way valve 14, the first interface 101, the third electronic expansion valve 17 and the front air-conditioning evaporator 06 are fluidly connected in sequence. The liquid-cooled condenser 03, the first interface 101, the first electronic expansion valve 15, the third interface 103 and the rear air-conditioning evaporator 07 are fluidly connected in sequence.

[0071] Among them, the pipeline connecting the fifth interface 105 and the seventh interface 107 is installed with a first refrigerant stop valve 08, the pipeline connecting the seventh interface 107 and the eighth interface 108 is installed with a second refrigerant stop valve 09, the pipeline connecting the liquid-cooled condenser 03 and the first interface 101 is installed with a third refrigerant stop valve 10, the pipeline connecting the inlet and outlet ends of the indoor condenser 05 is installed with a fourth refrigerant stop valve 11, and the pipeline connecting the third interface 103 and the rear air-conditioning evaporator 07 is installed with a fifth refrigerant stop valve 12. The first electronic expansion valve 15, the second electronic expansion valve 16, the third electronic expansion valve 17 and the first interface 101 are connected through a four-way joint, and a refrigerant temperature sensor 21 is installed between the four-way joint and the first interface 101. The pipeline connecting the second interface 102 and the third interface 103 is installed with a first one-way valve 13 that conducts one-way from the third interface 103 to the second interface 102.

[0072] See also Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, in the third feasible heat pump system, the pilot valve 400 can switch the on / off state of the fifth valve port 405 and the sixth valve port 406, thereby realizing the switch from the cooling mode to the heating mode. In the heating mode, when the ambient temperature is above 0°C, if the evaporator requires cooling, the pilot valve 400 switches to the state where the third valve port 403 is connected to the fourth valve port 404, and the fifth valve port 405 is connected to the sixth valve port 406 (see Fig. 9 ); otherwise, the pilot valve 400 switches to a state where the third valve port 403 is disconnected from the fourth valve port 404 and the fifth valve port 405 is disconnected from the sixth valve port 406 (see Figure 8 ). In the heating state and the ambient temperature is -20℃~0℃, the pilot valve 400 is switched to the state where the third valve port 403 is disconnected from the fourth valve port 404 and the fifth valve port 405 is disconnected from the sixth valve port 406 (see Fig.10), the evaporator does not need to be cooled after the temperature is below 0℃, and the liquid-cooled condenser 03 participates in the cycle, which is beneficial to the system energy efficiency ratio. In the heating state, and the ambient temperature is below -20℃, the pilot valve 400 switches to the state where the third valve port 403 is connected to the fourth valve port 404 (see Fig.11 ), at this time, the liquid-cooled condenser 03 does not participate in the circulation, the outdoor condenser 04 and the electronic expansion valve are in a closed state, and the connection between the fifth valve port 405 and the sixth valve port 406 has no effect on the system. When the heating state is switched to the cooling state, the compressor 01 stops, the second electronic expansion valve 16 opens, and after the pressure relief is completed, the pressure of the first interface 101 and the ninth interface 109 are equal, and the multi-way reversing valve is reset under the action of elastic force.

[0073] The heat pump system described in the above-mentioned implementation manner can realize the switching of system loop cooling and heating conditions, the rear air conditioning switch, and whether to choose to use the liquid-cooled condenser 03 in the heating state, which can realize the integration of function switching and reduce the production cost of the heat pump system.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-way reversing valve, characterized in that: include: A valve body (100), a valve core (200), an elastic member (300) and a pilot valve (400); The valve core (200) is movably installed inside the valve body (100), and the inside of the valve body (100) is divided into a plurality of chambers; The valve body (100) is provided with a plurality of interfaces, and the plurality of interfaces are respectively connected to the corresponding chambers; The valve core (200) has a first position and a second position for switching the on / off states of the plurality of interfaces and the chamber, and the elastic member (300) is installed in the valve body (100) and acts on the valve core (200) so that the valve core (200) has a tendency to switch from the first position to the second position; The plurality of chambers at least include: a first chamber (010), a second chamber (020) and a third chamber (030); The pilot valve (400) is connected between the second chamber (020) and the third chamber (030) to regulate the connection and disconnection between the second chamber (020) and the third chamber (030); The first chamber (010) is located at one end of the valve core (200), the third chamber (030) is located at the other end of the valve core (200), and the direction from the first chamber (010) to the third chamber (030) is opposite to the direction in which the elastic member (300) acts on the valve core (200); In a state where the second chamber (020) is fluidically connected to the third chamber (030) and the internal pressure of the first chamber (010) is greater than the internal pressure of the second chamber (020), the valve core (200) overcomes the elastic force of the elastic member (300) and switches from the second position to the first position; A fourth chamber (040) is formed between the valve body (100) and the valve core (200); at the first working position, the first chamber (010) is in communication with the fourth chamber (040); The valve core (200) is provided with a bypass hole communicating with the first chamber (010) and the fourth chamber (040), and a one-way diaphragm (500) is installed in the bypass hole; When the internal pressure of the fourth chamber (040) is greater than the internal pressure of the first chamber (010), the one-way diaphragm (500) opens to allow the first chamber (010) to communicate with the fourth chamber (040); When the internal pressure of the fourth chamber (040) is less than or equal to the internal pressure of the first chamber (010), the one-way diaphragm (500) is closed to isolate the first chamber (010) from the fourth chamber (040).

2. The multi-way reversing valve according to claim 1, characterized in that: A fifth chamber (050) is formed between the valve body (100) and the valve core (200); The valve core (200) is provided with a first flow guide channel (201) extending from the fourth chamber (040) to communicate with the fifth chamber (050).

3. The multi-way reversing valve according to claim 2, characterized in that: A sixth chamber (060) is formed between the valve body (100) and the valve core (200); The fifth chamber (050), the sixth chamber (060), the fourth chamber (040), and the first chamber (010) are arranged in sequence along a direction from the first workstation to the second workstation; The plurality of interfaces include a first interface (101), a second interface (102), a third interface (103) and a fourth interface (104) arranged on the valve body (100), wherein the first interface (101), the second interface (102), the third interface (103) and the fourth interface (104) are arranged in sequence and spaced apart in a direction from the first chamber (010) to the fifth chamber (050); At the first workstation, the first interface (101) is in communication with the first chamber (010), the second interface (102) and the third interface (103) are both in communication with the sixth chamber (060), and the fourth interface (104) is in communication with the fifth chamber (050); At the second workstation, the first interface (101) is in communication with the fourth chamber (040), the second interface (102) is in communication with the sixth chamber (060), and the third interface (103) and the fourth interface (104) are both in communication with the fifth chamber (050).

4. The multi-way reversing valve according to claim 3, characterized in that: A seventh chamber (070) is formed between the valve body (100) and the valve core (200), and the fifth chamber (050) is located between the sixth chamber (060) and the seventh chamber (070); The valve body (100) is provided with a fifth interface (105), and in the first working position the fifth interface (105) is communicated with the fifth chamber (050), and in the second working position the fifth interface (105) is communicated with the seventh chamber (070).

5. The multi-way reversing valve according to claim 4, characterized in that: An eighth chamber (080) is formed between the valve body (100) and the valve core (200); The valve body (100) is provided with a sixth interface (106) and a seventh interface (107), and the fifth interface (105), the sixth interface (106) and the seventh interface (107) are arranged in sequence; At the first workstation, the sixth interface (106) is in communication with the seventh chamber (070), and the seventh interface (107) is in communication with the eighth chamber (080); At the second workstation, the sixth interface (106) and the seventh interface (107) are both connected to the eighth chamber (080).

6. The multi-way reversing valve according to claim 5, characterized in that: The valve body (100) is provided with an eighth interface (108); At the first workstation, the eighth interface (108) is in communication with the eighth chamber (080), and at the second workstation, the eighth interface (108) is in communication with the second chamber (020).

7. The multi-way reversing valve according to claim 6, characterized in that: The plurality of interfaces include a ninth interface (109) which is arranged on the valve body (100) and communicates with the third chamber (030).

8. The multi-way reversing valve according to any one of claims 1 to 7, characterized in that: The valve core (200) is provided with a second flow guide channel (202) extending from the first chamber (010) to communicate with the second chamber (020).

9. The multi-way reversing valve according to claim 1, characterized in that: The plurality of chambers further include a fifth chamber (050), a sixth chamber (060), and a seventh chamber (070) formed between the valve body (100) and the valve core (200); The first chamber (010), the fourth chamber (040), the fifth chamber (050), the sixth chamber (060), the seventh chamber (070), the second chamber (020) and the third chamber (030) are arranged in sequence; The plurality of interfaces include a first interface (101), a second interface (102), a third interface (103), a fourth interface (104), a fifth interface (105), a sixth interface (106), a seventh interface (107) and an eighth interface (108) which are arranged on the valve body (100) and are sequentially distributed along a direction from the first chamber (010) to the third chamber (030); At the first workstation, the first interface (101) is in communication with the first chamber (010), the second interface (102) and the third interface (103) are both in communication with the fourth chamber (040), the fourth interface (104) is in communication with the fifth chamber (050), the fifth interface (105) and the sixth interface (106) are both in communication with the seventh chamber (070), and the seventh interface (107) and the eighth interface (108) are both in communication with the second chamber (020); At the second workstation, the first interface (101) and the second interface (102) are both in communication with the fourth chamber (040), the third interface (103) is in communication with the fifth chamber (050), the fourth interface (104) is in communication with the sixth chamber (060), the fifth interface (105) is in communication with the seventh chamber (070), and the sixth interface (106) and the seventh interface (107) are both in communication with the second chamber (020); The eighth interface (108) is regulated to be open or closed with the third chamber (030) via the pilot valve (400).

10. The multi-way reversing valve according to claim 9, characterized in that: The valve core (200) extends from the sixth chamber (060) and is connected to a third flow guide channel (203) of the third chamber (030).

11. The multi-way reversing valve according to claim 10, characterized in that: The valve core (200) extends from the third flow guiding channel (203) to communicate with the fourth flow guiding channel (204) of the second chamber (020).

12. The multi-way reversing valve according to claim 7, characterized in that: The pilot valve (400) comprises a first valve chamber (410), a second valve chamber (420), a third valve chamber (430), a fourth valve chamber (440) and a fifth valve chamber (450), and the pilot valve (400) is provided with a first valve port (401), a second valve port (402), a third valve port (403), a fourth valve port (404), a fifth valve port (405) and a sixth valve port (406); The first valve port (401) is fluidically connected to the second valve port (402) via a liquid cooling condensation circuit, the third valve port (403) is fluidically connected to the second interface (102), the fourth valve port (404) is fluidically connected to the sixth interface (106), the fifth valve port (405) is fluidically connected to the eighth interface (108), and the sixth interface (106) is fluidically connected to the ninth interface (109); When the pilot valve (400) is in the first state, the first valve port (401) and the third valve port (403) are both in communication with the second valve chamber (420), the second valve port (402) and the fourth valve port (404) are both in communication with the third valve chamber (430), the fifth valve port (405) is in communication with the fourth valve chamber (440), and the sixth valve port (406) is in communication with the fifth valve chamber (450); When the pilot valve (400) is in the second state, the first valve port (401) is connected to the first valve cavity (410), the second valve port (402), the third valve port (403) and the fourth valve port (404) are all connected to the second valve cavity (420), and the fifth valve port (405) and the sixth valve port (406) are all connected to the fourth valve cavity (440).

13. The multi-way reversing valve according to claim 1, characterized in that: A buffer pad (140) is installed in the first chamber (010); At the second working position, the valve core (200) abuts against the buffer pad (140).

14. A heat pump system, characterized in that: The heat pump system is equipped with the multi-way reversing valve according to any one of claims 1-13.

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