CN211779163U

CN211779163U - Flow path switching device

Info

Publication number: CN211779163U
Application number: CN201921424825.0U
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-10-27
Anticipated expiration: 2029-08-29

Abstract

The utility model discloses a flow path switching device, which comprises a check valve core and a main body part, wherein the check valve core is positioned on the main body part; the main body part is provided with a trunk passage, and the valve core of the one-way valve is positioned in the trunk passage; the main body part is integrally provided with a first channel and a second channel; the first channel is a branch channel of the trunk channel, and the second channel is a branch channel of the trunk channel; the electromagnetic valve core assembly comprises a first electromagnetic valve core assembly and a second electromagnetic valve core assembly, wherein the main body part comprises a top side part, a first mounting cavity and a second mounting cavity are formed in the top side part, at least part of the first electromagnetic valve core assembly is inserted into the first mounting cavity from the top side part, at least part of the second electromagnetic valve core assembly is inserted into the second mounting cavity from the top side part, at least part of the first electromagnetic valve core assembly is positioned in a second channel, and at least part of the second electromagnetic valve core assembly is positioned in the first channel; at least one of the second passage and the first passage is connected to an inlet side of the check valve spool. The flow path switching device can improve the safety and stability of the system.

Description

Flow path switching device

Technical Field

The utility model relates to a fluid control field.

Background

The heat pump system comprises a compressor, an indoor condenser, an outdoor condenser, an evaporator, a gas-liquid separator and valve parts connected through pipelines, and the heat pump system at least has a refrigerating mode and a heating mode, so a fluid flow path is switched through control of a valve in the system, the flow path switching needs to be carried out through a plurality of valve parts in the system, the valve parts are connected with components in the system, such as the compressor and the like through pipelines, a plurality of component connecting pipelines similar to three-way pipes are possibly needed, and more components are needed when the pipelines are connected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flow path auto-change over device.

In order to realize the purpose, the following technical scheme is adopted:

a flow path switching device comprises a one-way valve core and a main body part, wherein the one-way valve core is positioned on the main body part; the main body part is provided with a main channel, and the check valve core is positioned in the main channel;

the main body part is integrally provided with a first channel and a second channel; the first channel is a branch channel of the trunk channel, and the second channel is a branch channel of the trunk channel;

the flow path switching device at least comprises a first electromagnetic valve core assembly and a second electromagnetic valve core assembly, the main body part comprises a top side part, the top side part is provided with a first installation cavity and a second installation cavity, at least part of the first electromagnetic valve core assembly is inserted into the first installation cavity from the top side part, at least part of the second electromagnetic valve core assembly is inserted into the second installation cavity from the top side part, at least part of the first electromagnetic valve core assembly is positioned in the second channel, and at least part of the second electromagnetic valve core assembly is positioned in the first channel;

at least one of the second passage and the first passage is connected to an inlet side of the check valve spool.

The technical scheme includes that the valve core switching device comprises a first electromagnetic valve core assembly, a second electromagnetic valve core assembly and a one-way valve core, a first channel and a second channel are integrally formed in a main body portion, at least part of the first electromagnetic valve core assembly is located in the second channel, at least part of the second electromagnetic valve core assembly is located in the first channel, the main body portion comprises a top side portion, a first installation cavity and a second installation cavity are formed in the top side portion, at least part of the first electromagnetic valve core assembly is inserted into the first installation cavity from the top side portion, at least part of the second electromagnetic valve core assembly is inserted into the second installation cavity from the top side portion, at least one of the second channel and the first channel is connected with an inlet side of the one-way valve core, and therefore when the flow path switching device is connected with an application system, connecting pipelines are few.

Drawings

FIG. 1 is a schematic structural view of one embodiment of a flow path switching apparatus;

FIG. 2 is a schematic structural view of another view of the flow path switching apparatus shown in FIG. 1;

FIG. 3 is an exploded view of the flow switching device shown in FIG. 1;

FIG. 4 is an exploded view of a portion of the flow switching device shown in FIG. 1;

FIG. 5 is an exploded view of a portion of the flow switching device shown in FIG. 1;

FIG. 6 is an exploded view of a portion of the flow switching device shown in FIG. 1;

FIG. 7 is an exploded view of a portion of the flow switching device shown in FIG. 1;

FIG. 8 is a schematic view of an embodiment of a flow path switching device;

FIG. 9 is a schematic view showing another embodiment of the flow path switching device;

FIG. 10 is a schematic view of one embodiment of a check valve cartridge mated with a body portion;

FIG. 11 is a schematic view of another embodiment of a check valve cartridge mated with a body portion.

Detailed Description

Referring to fig. 1 to 7, fig. 1 to 7 illustrate a structural schematic diagram of a flow path switching device, a flow path switching device 100 includes a main body 11, and the main body 11 includes a first port 112, a second port 113, a third port 111, a fourth port 114, a fifth port 115, and a sixth port 116, where the third port 111, the first port 112, the second port 113, the fourth port 114, the fifth port 115, and the sixth port 116 are inlets or outlets for connecting the flow path switching device with an external component.

The main body portion 11 includes a top side portion 117, and the top side portion 117 is a side portion on which the flow path switching device 100 is normally placed facing downward and upward. The flow path switching device 100 at least comprises a valve core component 12, a first electromagnetic valve core component 13, a second electromagnetic valve core component 14 and a one-way valve core 15, wherein a first mounting cavity, a second mounting cavity and a third mounting cavity are formed in the top side 117, at least part of the first electromagnetic valve core component 13 is inserted into the first mounting cavity 1171 from the top side 117, at least part of the second electromagnetic valve core component 14 is inserted into the second mounting cavity 1172 from the top side 117, at least part of the valve core component 12 is inserted into the third mounting cavity 1173 from the top side 117, the one-way valve core 15 is located inside the main body part 11, and the one-way valve core 15 can be embedded into the main body part 11 from the second interface 113. Each valve core assembly may include a core portion of the valve or a stator coil arrangement if present or a drive mechanism if present, etc.

The main body 11 includes a peripheral side portion 118, the peripheral side portion 118 is provided with a third port 111, a fourth port 114, a second port 113 and a sixth port 116, the spool component 12, the first solenoid valve spool assembly 13 and the second solenoid valve spool assembly 14 are inserted into the main body 11 from the top side portion 117, the third port 111, the fourth port 114, the second port 113 and the sixth port 116 are located on the peripheral side portion 118, because the flow path switching device 100 is located on the top side in the using process, the valve core assembly is inserted from the top side, which is beneficial to the service life of the valve core component 12, the first electromagnetic valve core assembly 13, and the second electromagnetic valve core assembly 14 and is beneficial to maintaining the stability of the performance of the valve core component 12, the first electromagnetic valve core assembly 13, and the second electromagnetic valve core assembly 14, meanwhile, the method is also beneficial to the accurate control of the fluid, improves the stability of the system and also improves the safety of the system.

The flow channel switching device 100 includes a fourth channel 101, a second channel 102, a main channel 103, a fifth channel 104, and a first channel 105, the fourth channel 101 may communicate with a third port 111 and a fourth port 114, the second channel 102 may communicate with a first port 112 and a fifth port 115, the main channel 103 may communicate with the first port 112 and a second port 113, the fifth channel 104 may communicate with the fifth port 115 and a sixth port 116, and the first channel 105 may communicate with the second port 113 and the fourth port 114. The second channel 102 is routed to a valve seat 131 corresponding to the first solenoid valve spool assembly 13, and the first channel 105 is routed to a valve seat 141 corresponding to the second solenoid valve spool assembly 14. Herein, the passage is defined as that which the body part has when not equipped with the valve core structure, the passage comprising a wall portion of the body part providing the passage space.

Referring to fig. 8 and 9, the main body 11 defines a first communicating region 1111, the first communicating region 1111 connects at least 4 branch channels, the second channel 102 is one of the at least 4 branch channels, and the first channel 105 is one of the at least 4 branch channels; the first communicating region 1111 is a part of the trunk passage 103.

First communication zone 1111 has first partition 1112, second partition 1113, and third partition 1114, second channel 102 connects to first partition 1112, first channel 105 connects to third partition 1114, and second partition 1113 connects first partition 1112 to third partition 1114; in this manner, the first and

third sections

1112, 1114 may be configured to provide a more compact body portion 11 that is more suitable for mating with external components. The check valve spool 15 is located in the second partition 1113 or the check valve spool 15 is located in the trunk passage 103, wherein the second port 113 is a port of the trunk passage 103.

The flow path switching device 100 has a first closing member 1115 and a second closing member 1116, a straight extension line of the second channel 102 penetrates the first divided region 1112 and the first closing member 1115, and a straight extension line of the first channel 105 penetrates the third divided region 1114 and the second closing member 1116; the first closing member 1115 and the second closing member 1116 are assembled, fixed and sealed with the main body 11. The body 11 defines a passage communicating with the second passage 102, the body 11 defines a passage communicating with the first passage 105, and is assembled and fixed to the body 11 by the first closing member 1115, and the second closing member 1116 is assembled and fixed to the body 11, for example, by screwing. When the main body 11 is machined, the peripheral side part can be drilled, the first partition and the second channel can be formed, and the third partition and the first channel can be formed, so that the main body structure can be machined conveniently.

With continued reference to fig. 8 and 9, the main body portion 11 is opened with a second communication region 1117, the second communication region 1117 connects at least 3 branch channels, the first channel 105 is one of the at least 3 branch channels, and defines one of the at least 3 branch channels as a fourth channel 101, the flow path switching device 100 includes a spool member 12, and at least a portion of the spool member 12 is located in the fourth channel 101.

The flow path switching device is connected with other parts of the heat pump system, only the third interface 111, the first interface 112, the second interface 113, the fourth interface 114, the fifth interface 115 and the sixth interface 116 need to be connected, the connection with the system is convenient, and compared with the heat pump system connected through a plurality of pipelines, the risk of influencing the precision performance of the system due to long-term shaking vibration is reduced, and the stability of the system is improved; and in the case that the flow path switching device is fixed in a moving state, for example, the external moving state has little influence on the shaking of the flow path switching device, which is beneficial to maintaining the stability and reliability of a system applying the flow path switching device. In addition, as the system is filled with the refrigerant, the safety of the system can be improved by the small number of the connecting interfaces, and the risk of external leakage caused by the refrigerant in the long-term shaking and vibrating process is reduced. The flow path switching device is convenient to supply as an integral part, the workshop is convenient to store, the number of shelves for storing various different parts is reduced, and the manufacturing cost of the flow path switching device is reduced.

As an embodiment, referring to fig. 10, fig. 10 illustrates an assembly diagram of a check valve core 15', the check valve core 15 includes a core body 151, a spring member 152, and a limiting member 153, the main body 11 includes a necking wall portion 1118, one side of the core body 151 is engaged with the necking wall portion 1118, the other side of the core body 151 can abut against the limiting member 153, one end of the spring member 152 abuts against the core body 151, the other end of the spring member 152 abuts against the limiting member 153, and the core body 151 can reciprocate relative to the limiting member 153;

the second passage 102 is connected to the area between the first port 112 and the necked-down wall portion 1118; the first passage 105 is connected to the area between the first port 112 and the converging wall portion 1118 or the first passage 105 is connected to the area between the second port 113 and the converging wall portion 1118. Thus, after entering from the first port 112, the fluid may exit from the second passage 102, may exit from the second port through a check valve spool, or may exit from the first passage 105, so as to achieve the fluid switching requirement required by the system.

As another embodiment, referring to fig. 11, fig. 11 illustrates a schematic diagram of a check valve spool 15 ", where the check valve spool 15" includes a core body 151, a spring member 152, a first limiting member 154, and a second limiting member 155, the main body 11 has a first limiting groove 1119a and a second limiting groove 1119b, at least a portion of the first limiting member 154 extends into the first limiting groove 1119a, at least a portion of the second limiting member 155 extends into the second limiting groove 1119b, one side of the core body 151 abuts against the first limiting member 154, the other side of the core body 151 abuts against the second limiting member 155, one end of the spring member 152 abuts against the core body 151, the other end of the spring member 152 abuts against the second limiting member 155, and the core body 151 can reciprocate relative to the second limiting member 155;

the first position-limiting member 154 faces the first interface 112, and the second position-limiting member 155 faces away from the second interface 113; the second channel 102 is connected between the first interface 112 and the first limiting member 154; the first channel 105 is connected between the first interface 112 and the first retaining member 154 or the first channel 105 is connected between the second interface 113 and the second retaining member 155.

It should be understood that the above-described embodiments of the check valve spool are exemplary only, and are not intended to be limiting.

The flow path switching device 100 includes the gas-liquid separator 17, and the gas-liquid separator 17 and the main body 11 may be fixed by welding, fixing by bolts or screws, screwing, or other means. The gas-liquid separator 17 is in communication with the fifth port 115 and the sixth port 116, the second passage 102 is in communication with the inlet 171, the outlet 172 and the inner cavity 173 of the gas-liquid separator 17, and the fifth passage 104 may include the inlet 171, the outlet 172 and the inner cavity 173 of the gas-liquid separator 17. The flow path switching device 100 includes the gas-liquid separator 17, and thus has a more compact overall structure, and is communicated with the system through the third port 111, the first port 112, the second port 113, the fourth port 114, the fifth port 115, and the sixth port 116, thereby switching the flow path of the heat pump system among the cooling mode, the heating mode, and the dehumidification mode.

When the heat pump system is in the cooling mode, the flow switching device is in the first operating state, the fourth port 114 is a fluid inlet, the third port 111 is a fluid outlet, the first port 112 is a fluid inlet, the fifth port 115 is a fluid outlet, the sixth port 116 is a fluid inlet, and the second port 113 is a fluid outlet.

When the heat pump system is in the heating mode, at this time, the flow switching device is in the second operating state, the fourth port 114 is a fluid inlet, the third port 111 is a fluid outlet, the first port 112 is a fluid inlet, and the fifth port 115 is a fluid outlet.

When the heat pump system is in the dehumidification mode, at this time, the flow path switching device is in the third operating state, the fourth port 114 is a fluid inlet, the second port 113 is a fluid outlet, the sixth port 116 is a fluid inlet, and the fifth port 115 is a fluid outlet.

After the system is communicated with the six interfaces, the switching of the fluid flow path can be realized in the flow path switching device, the control of the flow path can be realized only by performing motor control on each valve core, such as the valve core component 12, the first electromagnetic valve core component 13 and the second electromagnetic valve core component 14, and the system is simple to control. As the external connection is six interfaces, the system is convenient to miss detection under extreme conditions, such as when external leakage occurs, and the missed detection interfaces are concentrated on the flow path switching device, so that subsequent maintenance is facilitated.

In the embodiment shown in fig. 1 to 7, the main body 11 includes a first portion 1101 and a second portion 1102, and the first portion 1101 and the second portion 1102 may be fixed by bolts or screws, may be fixed by welding, or in other manners. The first portion 1101 is provided with a valve core member 12, the first portion 1101 is provided with a fourth channel 101, a top side 117 of the first portion 1101 is provided with a mounting hole, and at least a part of the valve core member 12 is inserted from the top side 117 of the first portion 1101. The second portion 1102 is provided with a first solenoid valve core assembly 13 and a second solenoid valve core assembly 14, and the second portion 1102 is provided with a second port 113, a sixth port 116, a fifth port 115 and a first port 112.

The first part 1101 and the second part 1102 are fixed through bolts or screws 18 or in other modes, the first part 1101 and the second part 1102 are arranged in a split mode, the flow channel design in the main body part 11 can be more selected, the positions of all the interfaces can be changed more, the installation positions of all the interfaces can be met, the flow channel switching device can be connected in a system more conveniently, and the position requirements of other components in the system are met.

The flow path switching device 100 includes a first connector 20, at least a part of the first connector 20 is located in a first portion 1101, at least a part of the first connector 20 is located in a second portion 1102, the first connector 20 is hermetically disposed in the first portion 1101, the first connector 20 is hermetically disposed in the second portion 1102, a first passage 105 communicates between the second port 113 and the fourth port 114, and the first passage 105 is routed through the first connector 20. The provision of the first connector 20 allows for a close fit of the channels in the first and

second portions

1101, 1102, reducing the risk of leakage at the connection.

Referring to fig. 6 and 7, the fourth channel 101 communicating the third port 111 and the fourth port 114 includes a first sub-path 101a and a second sub-path 101b, and since the spool member 12 includes a first sub-spool portion 12a and a second sub-spool portion 12b, the fourth channel 101 is similar to two branches, one of which is the first sub-path 101a, and the fluid passes through the first sub-path 101a, implements the process of throttling and depressurizing, and then exits from the third port 111; the other is a second sub-path 101b, the fluid passes through the second sub-path 101b, the second sub-spool portion 12b is in the open state, and the fluid passes through the second sub-path 101b and then exits from the third port 111.

The valve core component 12 may include a first sub-valve core portion 12a and a second sub-valve core portion 12b, the first sub-valve core portion 12a may be an electronic expansion valve core, the second sub-valve core portion 12b may be a solenoid valve core assembly, and the valve core component 12 includes a first operating state and a second operating state, in the first operating state, the first sub-valve core portion 12a is in throttling, and the first sub-path 101a is conducted; in the second operating state, the first sub-valve core 12b is in a closed state, the second sub-valve core 12b is in an open state, the first sub-path 101a is closed, and the second sub-path 101b is open.

When the valve core component 12 needs to throttle, the first sub-valve core part 12a is controlled to enable the first sub-valve core part 12a to be in a throttling function; when the valve core component 12 needs to be conducted, the first sub-valve core portion 12a is controlled to enable the first sub-valve core portion 12a to be in a closed state, and the second sub-valve core portion 12b is opened to enable the fluid to be in a conducting state.

The second portion 1102 and the gas-liquid separator 17 may be fixed by bolts or screws 19, but the second portion 1102 and the gas-liquid separator 17 may be fixed by welding, screwing, or the like. The second part 1102 is assembled and fixed to the gas-liquid separator 17, and the fifth port 115 and the sixth port 116 of the second part 1102 communicate with the inlet and the outlet of the gas-liquid separator 17.

The flow path switching device 100 includes a second connection member 21, at least a part of the second connection member 21 extends into the second portion 1102, at least a part of the second connection member 21 extends into the gas-liquid separator 17, the second connection member 21 is provided in a sealed manner with the second portion 1102, and the second connection member 21 is provided in a sealed manner with the gas-liquid separator 17. The second connecting piece 21 enhances the precision of the fluid after the gas-liquid separator is connected with the second part to a certain extent, and is particularly suitable for assembling the gas-liquid separator 17 and the second part 1102 through screws, bolts, threads and the like.

Of course, as another embodiment, the valve core component 12 is a valve core of a large-diameter electronic expansion valve, and the valve core component has a first operating state and a second operating state, and in the first operating state, the valve core component is in throttling; in the second working state, the valve core component is in the maximum opening degree. The valve core of the large-caliber electronic expansion valve is used for controlling the electronic expansion valve to enable the electronic expansion valve to be in a throttling effect when the valve core part 12 needs to be throttled; when the valve core part 12 needs to be conducted, the electronic expansion valve is opened to the maximum opening degree, so that the electronic expansion valve is in a large-caliber conduction state. At this time, the fourth passage 101 does not have a path in the form of two branches like the above-described embodiment. The valve core of the large-caliber electronic expansion valve has larger flow rate when the valve core is in a conducting state, so that the requirement of a system is met.

In another embodiment, the main body 11 is a unitary structure, the main body 11 is integrally formed, and the main body 11 may be obtained by injection molding, casting, machining, forging, or the like. The main body 11 is an integral structure, which reduces the number of butt joint points and further reduces the risk of leakage. For example, the main body 11 is a machined product, the main body 11 is a similar square structure, which facilitates the machining operation, the main body 11 has different sides, the main body 11 has a top side 117 and a peripheral side 118, the spool component 12, the first solenoid valve spool assembly 13, and the second solenoid valve spool assembly 14 are inserted into the top side 117, the peripheral side 118 is provided with a third port 111, a fourth port 114, a second port 113, and a sixth port 116, and the third port 111 and the fourth port 114 are located on the different peripheral sides 118. The valve core component 12, the first solenoid valve core component 13, and the second solenoid valve core component 14 are inserted into the main body portion 11 from the top side portion 117, and the third port 111, the fourth port 114, the second port 113, and the sixth port 116 are located on the peripheral side portion 118, which is beneficial to accurately controlling fluid and improving the stability of the system, and is also beneficial to the service lives of the valve core component 12, the first solenoid valve core component 13, and the second solenoid valve core component 14, and improving the safety of the system.

As other embodiments, the flow path switching device may further include the main body portion 11 and the spool member 12, the first solenoid valve spool assembly 13, the second solenoid valve spool assembly 14, and the one-way valve spool 15. The main body 11 includes a third port 111, a first port 112, a second port 113, a fourth port 114, a fifth port 115, a sixth port 116, a seventh port, and an eighth port, and the seventh port and the eighth port may be used to communicate with the inlet and outlet of the gas-liquid separator in the above embodiment.

It should be noted that: the above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, such as the definition of the directionality of "front", "back", "left", "right", "up", "down", etc., although the present specification has described the present invention in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions and modifications can be combined with each other, modified or replaced with equivalents by those skilled in the art, and all the technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the scope of the claims of the present invention.

Claims

1. A flow path switching device comprises a one-way valve core and a main body part, wherein the one-way valve core is positioned on the main body part; the main body part is provided with a main channel, and the check valve core is positioned in the main channel;

the method is characterized in that: the main body part is integrally provided with a first channel and a second channel; the first channel is a branch channel of the trunk channel, and the second channel is a branch channel of the trunk channel;

2. The flow path switching device according to claim 1, wherein: the main body part comprises a first interface and a second interface, the first interface and the second interface are ports of the main passage, the check valve core comprises a core body, a spring part and a limiting part, the main body part comprises a necking wall part, one side of the core body is matched with the necking wall part, the other side of the core body can abut against the limiting part, one end of the spring part abuts against the core body, the other end of the spring part abuts against the limiting part, and the core body can reciprocate relative to the limiting part; the necking wall part faces the first interface relative to the limiting part, and the limiting part faces the second interface relative to the necking wall part; the flow path switching device includes a second fluid flow path and a third fluid flow path, at least one of the second fluid flow path and the third fluid flow path opening to the wall of the throat wall toward the first port.

3. The flow path switching device according to claim 1, wherein: the main body part comprises a first interface and a second interface, the first interface and the second interface are ports of the main channel, the check valve core comprises a core body, a spring part, a first limiting part and a second limiting part, the main body part is provided with a first limiting groove and a second limiting groove, at least part of the first limiting part extends into the first limiting groove, at least part of the second limiting part extends into the second limiting groove, one side of the core body abuts against the first limiting part, the other side of the core body abuts against the second limiting part, one end of the spring part abuts against the core body, the other end of the spring part abuts against the second limiting part, and the core body can reciprocate relative to the second limiting part; the first limiting piece is close to the first interface relative to the second limiting piece, and the second limiting piece is close to the second interface relative to the first limiting piece; the flow path switching device includes a second fluid flow path and a third fluid flow path, and at least one of the second fluid flow path and the third fluid flow path is opened in a wall portion of the first stopper extending toward the first port.

4. The flow path switching device according to claim 1, wherein: the main body part is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface and a sixth interface, the main body part is provided with a fourth channel and a fifth channel, the fourth channel is communicated with the third interface and the fourth interface, the second channel is communicated with the first interface and the fifth interface, the fifth channel is communicated with the fifth interface and the sixth interface, and the first channel is communicated with the second interface and the fourth interface; the main body part is connected with a gas-liquid separator, and the inner cavity of the gas-liquid separator is communicated with the second channel.

5. The flow path switching device according to any one of claims 1 to 4, wherein: the main body part comprises a top side part, a first installation cavity and a second installation cavity are formed in the top side part, at least part of the first electromagnetic valve core assembly is inserted into the first installation cavity from the top side part, and at least part of the second electromagnetic valve core assembly is inserted into the second installation cavity from the top side part.

6. The flow path switching device according to claim 1, wherein: the flow path switching device has a first closure and a second closure, the flow path switching device has a first partition and a third partition, a straight line extension of the first channel runs through the first partition and the first closure, and a straight line extension of the second channel runs through the third partition and the second closure; the first sealing piece and the second sealing piece are assembled and fixed with the main body part and are arranged in a sealing mode.

7. The flow path switching device according to any one of claims 1 to 3, wherein:

the main body part is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface and a sixth interface;

the main body part is of an integral structure and is provided with a peripheral side part, the peripheral side part is provided with the third interface, a fourth interface, a second interface and a sixth interface, and the third interface and the fourth interface are positioned on different peripheral side parts; or the main body part comprises a first part and a second part, the first part is provided with the third interface and the fourth interface, the first part is provided with a valve core component, the second part is provided with the first electromagnetic valve core component, the second electromagnetic valve core component and the one-way valve core, and the first part and the second part are fixed by bolts or screws or are fixed by welding.

8. The flow path switching device according to claim 1, wherein: the main body part is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface and a sixth interface, the main body part is provided with a fourth channel and a fifth channel, the fourth channel is communicated with the third interface and the fourth interface, the second channel is communicated with the first interface and the fifth interface, the main channel is communicated with the first interface and the second interface, the fifth channel is communicated with the fifth interface and the sixth interface, and the first channel is communicated with the second interface and the fourth interface; the flow path switching device is provided with a gas-liquid separator, the gas-liquid separator is communicated with the fifth interface and the sixth interface, and the second channel is communicated with a valve seat corresponding to the first electromagnetic valve core assembly;

the main body part is of an integral structure, the main body part is provided with a peripheral side part, the peripheral side part is provided with a third interface, a fourth interface, a second interface and a sixth interface, the third interface and the fourth interface are positioned on different peripheral side parts, and the fourth channel, the trunk channel and the first channel are positioned on the main body part;

the flow path switching device has a first working state, a second working state and a third working state, when the flow path switching device is in the first working state, the fourth interface is a fluid inlet, the third interface is a fluid outlet, the first interface is a fluid inlet, the fifth interface is a fluid outlet, the sixth interface is a fluid inlet, and the second interface is a fluid outlet;

when the flow path switching device is in a second working state, the fourth interface is a fluid inlet, the third interface is a fluid outlet, the first interface is a fluid inlet, and the fifth interface is a fluid outlet;

when the flow path switching device is in a third working state, the fourth interface is a fluid inlet, the second interface is a fluid outlet, the sixth interface is a fluid inlet, and the fifth interface is a fluid outlet;

the flow path switching device comprises a valve core component, the valve core component comprises a first sub valve core part and a second sub valve core part, the first sub valve core part is an electronic expansion valve core, the second sub valve core part is an electromagnetic valve core assembly, the fourth channel comprises a first sub path and a second sub path,

the valve core component comprises a first working state and a second working state, and in the first working state of the valve core component, the first sub-valve core part is in throttling and the first sub-path is conducted; in a second working state of the valve core component, the first sub-valve core part is in a closed state, the second sub-valve core part is in an open state, the first sub-path is closed, and the second sub-path is conducted; or the valve core component is a valve core of the large-caliber electronic expansion valve, the valve core component has a first working state and a second working state, and the valve core component is in throttling in the first working state of the valve core component; in the second working state of the valve core component, the valve core component is in the maximum opening degree.

9. The flow path switching device according to claim 1, wherein:

the main body part is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface and a sixth interface, the main body part is provided with a fourth channel and a fifth channel, the fourth channel is communicated with the third interface and the fourth interface, the second channel is communicated with the first interface and the fifth interface, the main channel is communicated with the first interface and the second interface, the fifth channel is communicated with the fifth interface and the sixth interface, and the first channel is communicated with the second interface and the fourth interface; the flow path switching device is provided with a gas-liquid separator, the gas-liquid separator is communicated with the fifth interface and the sixth interface, and the second channel is communicated with a valve seat corresponding to the first electromagnetic valve core assembly;

the main body part comprises a first part and a second part, the first part is provided with the third interface and the fourth interface, the first part is provided with a valve core component, the second part is provided with the first electromagnetic valve core component, the second electromagnetic valve core component and the one-way valve core, and the first part and the second part are fixed by bolts or screws or are fixed by welding;

the second part is fixed with the gas-liquid separator through bolts or screws or is in threaded connection or is welded and fixed, the flow path switching device is provided with a first connecting piece and a second connecting piece, at least part of the first connecting piece is positioned in the first part, at least part of the first connecting piece is positioned in the second part, the first connecting piece is arranged in a sealing way with the first part, the first connecting piece is arranged in a sealing way with the second part, the first channel is communicated with the second interface and the fourth interface, and the first channel is communicated with the first connecting piece; at least part of the second connecting piece extends into the second part, at least part of the second connecting piece extends into the gas-liquid separator, the second connecting piece and the second part are arranged in a sealing way, and the second connecting piece and the gas-liquid separator are arranged in a sealing way;

the valve core component comprises a first sub valve core part and a second sub valve core part, the first sub valve core part is an electronic expansion valve core, the second sub valve core part is a solenoid valve core assembly, the fourth channel comprises a first sub path and a second sub path,