阅读说明：本技术 电磁切换阀及具有其的热泵系统 (Electromagnetic switching valve and heat pump system with same ) 是由 不公告发明人 于 2019-10-31 设计创作，主要内容包括：本发明公开一种电磁切换阀及具有其的热泵系统,电磁切换阀包括阀座部件、驱动部件和滑块部件；阀座部件设有能够与阀腔连通的D、E、S、C接口；滑块部件具有与阀腔、D接口均不连通的流通通道,流通通道具有两个通道口部；驱动部件用于驱动滑块部件转动以在三个工作位之间切换,并配置成：位于第一工作位,E、S接口分别与两个通道口部连通,且C、D接口均不与流通通道连通；位于第二工作位,E、S、C接口均与阀腔连通；位于第三工作位,S、C接口分别与滑块的两个通道口部连通,且E、D接口均不与流通通道连通。该电磁切换阀具有三个工作位,应用于热泵系统,能够在室内室外机工况不变的情况下,实现对室外机的除霜操作,避免能量损耗。(The invention discloses an electromagnetic switching valve and a heat pump system with the same, wherein the electromagnetic switching valve comprises a valve seat component, a driving component and a sliding block component; the valve seat component is provided with an D, E, S, C interface which can be communicated with the valve cavity; the slide block component is provided with a flow passage which is not communicated with the valve cavity and the interface D, and the flow passage is provided with two passage openings; the driving component is used for driving the sliding block component to rotate so as to switch between three working positions and is configured to: the E, S interface is respectively communicated with the openings of the two channels and the C, D interface is not communicated with the circulation channel when the device is positioned at a first working position; in the second working position, the E, S, C interfaces are communicated with the valve cavity; and the S, C interface is respectively communicated with the two channel openings of the sliding block and the E, D interface is not communicated with the circulation channel when the sliding block is positioned at the third working position. The electromagnetic switching valve has three working positions, is applied to a heat pump system, can realize defrosting operation on an outdoor unit under the condition that the working condition of an indoor unit and an outdoor unit is not changed, and avoids energy loss.)

1. The electromagnetic switching valve is characterized by comprising a valve seat component and a driving component, and the electromagnetic switching valve comprises a valve cavity, wherein a slide block component is arranged in the valve cavity;

the valve seat component is provided with a D interface, an E interface, an S interface and a C interface which can be communicated with the valve cavity;

the slider component is provided with a flow passage, two ends of the flow passage respectively form passage openings, the bottom of the slider comprises a concave part, and the flow passage is not communicated with the valve cavity and the D interface;

the valve seat is provided with a shaft part, the driving part is used for driving the sliding block part to rotate around the shaft part so as to switch between three working positions, and the distance between the two channel openings and the E interface, the S interface and the C interface are approximately equal;

and is configured to:

the two channel openings of the sliding block cover the E interface and the S interface, the circulation channel is communicated with the E interface and the S interface, and the C interface and the D interface are not communicated with the circulation channel;

the two passage openings of the sliding block are abutted against the surface of the valve seat, the concave part is at least partially positioned above the S port, and the E port, the S port and the C port are all communicated with the valve cavity;

and the two channel opening parts of the sliding block cover the S interface and the C interface, the circulation channel is communicated with the S interface and the C interface, and the E interface and the D interface are not communicated with the circulation channel.

2. The electromagnetic switching valve according to claim 1, wherein the valve seat member comprises a valve seat and a valve sleeve fixedly connected to an upper end of the valve seat, and the E port, the S port, the C port and the D port are all opened in the valve seat; the slider part is rotationally sleeved on the shaft part, the slider part is in sealing fit with the valve seat, and the opening parts of the two channels are located on the bottom surfaces of the slider part and the valve seat.

3. The electromagnetic switching valve according to claim 2, wherein a first position limiting member and a second position limiting member are fixedly disposed on the valve seat, the slider member rotates to abut against the first position limiting member, the slider is located at the first working position, the slider member rotates to abut against the second position limiting member, and the slider is located at the third working position.

4. The electromagnetic switching valve according to claim 2, wherein the driving member includes a driving source and a gear reduction mechanism, the driving source includes an output shaft, the driving source is configured to drive the output shaft to rotate, the output shaft is fixedly connected with a first gear, the first gear is engaged with an input gear of the gear reduction mechanism, and an output gear of the gear reduction mechanism is sleeved on the shaft portion and can drive the slider member to rotate synchronously.

5. The electromagnetic switching valve according to claim 4, wherein the output gear has a limiting groove towards the bottom of the valve seat, the slider member has a limiting portion at the top thereof for engaging with the limiting groove, and the limiting portion is engaged with the limiting groove, so that the output gear rotates to drive the slider member to rotate synchronously.

6. The electromagnetic switching valve according to claim 4, wherein the valve seat member includes a valve cap fixedly secured to an upper end of the valve housing, a lower end of the output shaft passing through the valve cap, and the first gear being located below the valve cap; the driving part further comprises a support plate positioned between the valve cover and the valve seat, the support plate is fixedly connected with the valve cover through a support shaft, a plurality of gear shafts are fixedly inserted into the support plate, and the gear shafts are sleeved with the gears of the gear reduction mechanism.

7. The electromagnetic switching valve according to any one of claims 1 to 6, wherein the flow channel of the slider member is U-shaped.

8. The electromagnetic switching valve according to claim 7, wherein the slider member includes a slider seat portion and a U-shaped channel portion, the U-shaped channel portion being fitted to the slider seat portion by injection molding; the slider seat portion comprises two connecting portions matched with two channel ports of the U-shaped channel portion, a concave portion which is concave upwards is arranged at the bottom of the slider seat portion, and the concave portion is located between the two connecting portions.

9. The electromagnetic switching valve of claim 8 wherein the slider component is an integrally molded piece.

10. The heat pump system comprises a compressor, an indoor heat exchanger and a four-way valve, wherein an inlet of the compressor is communicated with an S port of the four-way valve;

the system is characterized by also comprising an electromagnetic switching valve, a first outdoor heat exchanger and a second outdoor heat exchanger; the electromagnetic switching valve is the electromagnetic switching valve according to any one of claims 1 to 9;

an outlet pipeline of the compressor is divided into two branches, a first branch is communicated with a D port of the four-way valve, and a second branch is communicated with a D port of the electromagnetic switching valve;

the port C of the four-way valve is communicated with one interface of the indoor heat exchanger, and the port E is communicated with the interface S of the electromagnetic switching valve;

an E port and a C port of the electromagnetic switching valve are respectively communicated with one port of the first outdoor heat exchanger and one port of the second outdoor heat exchanger;

the other port of the first outdoor heat exchanger and the other port of the second outdoor heat exchanger are communicated with the other port of the indoor heat exchanger through a pipe;

and a flow regulating valve is arranged on the second branch.

Technical Field

The invention relates to the field of refrigeration, in particular to an electromagnetic switching valve and a heat pump system with the same.

Background

In a refrigeration system, a four-way valve is generally used for switching the flowing direction of a refrigerant, the four-way valve generally has two stations, when the four-way valve is applied to an air-conditioning refrigeration system, when an air conditioner is in a refrigeration cycle, a D connecting pipe of the four-way valve is communicated with a C connecting pipe, an E connecting pipe is communicated with an S connecting pipe, at the moment, an outdoor heat exchanger is high-temperature high-pressure gas and releases heat to the outdoor environment, and low-temperature low-pressure gas is in an indoor heat exchanger and absorbs heat of the indoor environment to realize indoor; when the air conditioner is in a heating cycle, the D connecting pipe is communicated with the E connecting pipe, the C connecting pipe is communicated with the S connecting pipe, high-temperature and high-pressure gas is filled in the indoor heat exchanger and releases heat to the indoor environment to realize indoor heating, and low-temperature and low-pressure gas is filled in the outdoor heat exchanger to realize outdoor refrigeration.

In practical application, when the air conditioning system is in a heating cycle for a long time, the outdoor heat exchanger will be frosted, and in order to ensure the normal operation of the air conditioning system, the outdoor heat exchanger needs to be defrosted.

At present, the system is usually in a refrigeration cycle state by switching the stations of the four-way valve, so that the outdoor heat exchanger passes through high-temperature and high-pressure gas to defrost, and after defrosting is completed, the stations of the four-way valve are switched to realize heating cycle.

Disclosure of Invention

The invention provides an electromagnetic switching valve, which comprises a valve seat component and a driving component, wherein the electromagnetic switching valve comprises a valve cavity, and a slide block component is arranged in the valve cavity;

the valve seat component is provided with a D interface, an E interface, an S interface and a C interface which can be communicated with the valve cavity;

the slider component is provided with a flow passage, two ends of the flow passage respectively form passage openings, the bottom of the slider comprises a concave part, and the flow passage is not communicated with the valve cavity and the D interface;

the valve seat is provided with a shaft part, the driving part is used for driving the sliding block part to rotate around the shaft part so as to switch between three working positions, and the distance between the two channel openings and the E interface, the S interface and the C interface are approximately equal;

and is configured to:

the two channel openings of the sliding block cover the E interface and the S interface, the circulation channel is communicated with the E interface and the S interface, and the C interface and the D interface are not communicated with the circulation channel;

the two passage openings of the sliding block are abutted against the surface of the valve seat, the concave part is at least partially positioned above the S port, and the E port, the S port and the C port are all communicated with the valve cavity;

and the two channel opening parts of the sliding block cover the S interface and the C interface, the circulation channel is communicated with the S interface and the C interface, and the E interface and the D interface are not communicated with the circulation channel.

When the electromagnetic switching valve is in the second working position, the interface D, the interface E, the interface S and the interface C are all communicated, and the sliding block can be rotated and switched under the condition of no pressure difference (or low pressure difference), so that the requirement on the electromagnetic driving force is reduced.

The electromagnetic switching valve has three working positions, and can realize defrosting operation of an outdoor unit and reduce energy loss under the condition that the working conditions of indoor and outdoor heat exchangers are not changed after being applied to a heat pump system.

The invention also provides a heat pump system, which comprises a compressor, an indoor heat exchanger and a four-way valve, wherein the inlet of the compressor is communicated with the S port of the four-way valve;

the outdoor heat exchanger also comprises an electromagnetic switching valve, a first outdoor heat exchanger and a second outdoor heat exchanger; the electromagnetic switching valve is the electromagnetic switching valve described in any one of the above;

an outlet pipeline of the compressor is divided into two branches, a first branch is communicated with a D port of the four-way valve, and a second branch is communicated with a D port of the electromagnetic switching valve;

the port C of the four-way valve is communicated with one interface of the indoor heat exchanger, and the port E is communicated with the interface S of the electromagnetic switching valve;

an E port and a C port of the electromagnetic switching valve are respectively communicated with one port of the first outdoor heat exchanger and one port of the second outdoor heat exchanger;

the other port of the first outdoor heat exchanger and the other port of the second outdoor heat exchanger are communicated with the other port of the indoor heat exchanger through a pipe;

and a flow regulating valve is arranged on the second branch.

The heat pump system comprises the electromagnetic switching valve, and defrosting operation of the outdoor unit can be realized on the premise of not changing the heating state of the indoor unit.

Drawings

FIG. 1 is a schematic diagram of a heat pump system in a cooling mode in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a heat pump system in a heating mode according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a heat pump system in a first defrost mode in accordance with an embodiment of the present invention;

FIG. 4 is a schematic diagram of the heat pump system in a second defrost mode in accordance with an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an embodiment of an electromagnetic switching valve provided in the present invention;

FIG. 6 is a schematic structural view of the electromagnetic switch valve shown in FIG. 5 at another angle;

FIG. 7 is a front view of the electromagnetic switching valve of FIG. 5;

FIG. 8 is a schematic structural diagram of a driving part of the electromagnetic switching valve shown in FIG. 5;

FIG. 9 is a schematic diagram of the structure of the electromagnetic switch valve shown in FIG. 5 in which the sliding member is engaged with the valve seat;

FIG. 10 is a schematic structural view of a sliding member of the electromagnetic changeover valve in the embodiment;

FIG. 11 is a bottom view of the slide member of FIG. 10;

FIG. 12 is a cross-sectional view of the slide member of FIG. 10;

FIG. 13 is a schematic diagram showing the relative positions of the sliding member and the valve seat when the electromagnetic switch valve is in the first working position;

FIG. 14 is a schematic diagram showing the relative positions of the sliding member and the valve seat when the electromagnetic switching valve is in the second working position;

fig. 15 is a schematic diagram showing the relative positions of the sliding member and the valve seat when the electromagnetic switching valve is in the third operating position.

Description of reference numerals:

a compressor 101, an indoor heat exchanger 102, a first outdoor heat exchanger 131, a second outdoor heat exchanger 132, a four-way valve 104, an electromagnetic switching valve 105, and a flow rate adjusting valve 106;

a valve seat member 210, a valve cavity 210a, a valve seat 211, a valve housing 212, a valve cover 213;

the slider member 220, the slider seat portion 221, the stopper portion 2211, the recess portion 2212, the U-shaped channel portion 222, the flow channel 223, the channel mouth portion 224;

a drive source 230, an output shaft 231, a first gear 232;

a shaft portion 240;

a gear reduction mechanism 250, an input gear 251, an output gear 252, a convex portion 2521, a limit groove 2522, a first support plate 253, a second support plate 254, a support shaft 255, a gear shaft 256, and an intermediate gear 257;

a first limiting member 261 and a second limiting member 262.

Detailed Description

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

For the convenience of understanding and brevity of description, the following description will be made in conjunction with the electromagnetic switching valve and the heat pump system having the same, and the advantageous effects will not be repeated.

Referring to fig. 1 to 4, fig. 1 is a schematic diagram of a heat pump system in a cooling mode according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a heat pump system in a heating mode according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a heat pump system in a first defrost mode in accordance with an embodiment of the present invention; fig. 4 is a schematic diagram of the heat pump system in the second defrost mode in accordance with an embodiment of the present invention.

As shown in the figure, the heat pump system in this embodiment includes a compressor 101, an indoor heat exchanger 102, a first outdoor heat exchanger 131, a second outdoor heat exchanger 132, a four-way valve 104, and an electromagnetic switching valve 105.

The four-way valve 104 is a currently general four-way valve structure and has only two working positions, namely a working position where the port E is communicated with the port S and the port D is communicated with the port C, and a working position where the port E is communicated with the port D and the port S is communicated with the port C.

The electromagnetic switching valve 105 is an electromagnetic switching provided by the present invention, and has three working positions, which are specifically described in the following description of the working mode of the heat pump system.

The inlet of the compressor 101 is communicated with an S port of the four-way valve 104, an outlet pipeline of the compressor 101 is divided into two branches, a first branch is communicated with a D port of the four-way valve 104, a second branch is communicated with a D port of the electromagnetic switching valve 105, and the second branch is further provided with a flow regulating valve 106, specifically, the flow regulating valve 106 can be an expansion valve to regulate the flow of refrigerant on each branch, so as to ensure the normal operation of the heat pump system.

A port C of the four-way valve 104 communicates with one port of the indoor heat exchanger 102, and a port E communicates with a port S of the electromagnetic switching valve 105.

An E port of the electromagnetic switching valve 105 communicates with one port of the first outdoor heat exchanger 131, and a C port of the electromagnetic switching valve 105 communicates with one port of the second outdoor heat exchanger 132.

The other port of the first outdoor heat exchanger 131 and the other port of the second outdoor heat exchanger 132 are communicated with the other port of the indoor heat exchanger 102 through a pipe line on which a throttling element is provided.

As set forth above, the operation modes of the heat pump system include a cooling mode, a heating mode, and a defrosting mode, wherein the defrosting mode has two cases, which are described below.

Refrigeration mode

As shown in fig. 1, in the cooling mode, the four-way valve 104 is located at a working position where the port D is communicated with the port E and the port S is communicated with the port C, and the electromagnetic switching valve 105 is located at a working position where the port E, the port S, the port C and the port D are communicated with each other; the flow control valve 106 is in the fully closed position.

The high-temperature and high-pressure refrigerant at the outlet end of the compressor 101 flows to the D port of the four-way valve 104 through the first branch line, and then flows to the S port of the electromagnetic switching valve 105 through the E port of the four-way valve 104, because the S port, the E port, and the C port of the electromagnetic switching valve 105 are communicated with each other, the refrigerant flowing into the S port is divided into two paths, and flows into the first outdoor heat exchanger 131 and the second outdoor heat exchanger 132 through the E port and the C port, respectively, both the two outdoor heat exchangers are in a heating state at this time, the refrigerant passes through the outdoor heat exchanger and then becomes a low-temperature and low-pressure state through a throttling element, passes through the indoor heat exchanger 102, and at this.

Heating mode

As shown in fig. 2, in the heating mode, the four-way valve 104 is located at a working position where the port D is communicated with the port C and the port E is communicated with the port S, and the electromagnetic switching valve 105 is located at a working position where the port E, the port S, the port C and the port D are communicated with each other; the flow control valve 106 is in the fully closed position.

The high-temperature and high-pressure refrigerant at the outlet end of the compressor 101 flows to the D port of the four-way valve 104 through the first branch line, and then flows to the indoor heat exchanger 102 through the C port of the four-way valve 104, at this time, the indoor heat exchanger 103 is in a heating state, then the refrigerant changes to a low-temperature and low-pressure state after passing through the throttling element, and respectively flows into the first outdoor heat exchanger 131 and the second outdoor heat exchanger 132, at this time, both the outdoor heat exchangers are in a cooling state, and the refrigerant flowing out of the two outdoor heat exchangers respectively flows to the E port and the C port of the electromagnetic switching valve 105, flows to the four-way valve 104.

First defrost mode

As shown in fig. 3, in the first defrosting mode, the four-way valve 104 is in a working position where the port D is communicated with the port C and the port E is communicated with the port S, the electromagnetic switching valve 105 is in a working position where the port E is communicated with the port S and the port D is communicated with the port C; the flow regulating valve 106 is in an open state.

The flow rate adjustment valve 106 can adjust its opening degree according to the defrosting demand, and should also ensure the heating effect of the indoor heat exchanger 102.

The high-temperature and high-pressure refrigerant at the outlet end of the compressor 101 is divided into two branches, wherein a part of the refrigerant flows to the electromagnetic switching valve 105 through the flow regulating valve 106, flows into the second outdoor heat exchanger 132 through a passage from the interface D of the electromagnetic switching valve 105 to the interface C, at the moment, the second outdoor heat exchanger 132 is in a defrosting state, the refrigerant flowing out of the second outdoor heat exchanger 132 flows to the first outdoor heat exchanger 131 due to the action of pressure difference, and returns to the compressor 101 through a passage from the interface E of the electromagnetic switching valve 105 to the interface S and a passage from the interface E of the four-way valve 104 to the interface; another part of the refrigerant at the outlet end of the compressor 101 flows to the indoor heat exchanger 102 through a passage from the port D to the port C of the four-way valve 104, the indoor heat exchanger 102 is in a heating state, the refrigerant flowing out of the indoor heat exchanger 102 is changed into a low-temperature and low-pressure state by a throttling element, flows through the first outdoor heat exchanger 131, the first outdoor heat exchanger 131 is in a cooling state, and the refrigerant flowing out of the first outdoor heat exchanger 131 finally returns to the compressor 101 through the electromagnetic switching valve 105 and the four-way valve 104.

Second defrost mode

As shown in fig. 4, in the second defrosting mode, the four-way valve 104 is located at a working position where the port D is communicated with the port C and the port E is communicated with the port S, and the electromagnetic switching valve 105 is located at a working position where the port D is communicated with the port E and the port C is communicated with the port S; the flow regulating valve 106 is in an open state.

The flow rate adjustment valve 106 can adjust its opening degree according to the defrosting demand, and should also ensure the heating effect of the indoor heat exchanger 102.

The high-temperature high-pressure refrigerant at the outlet end of the compressor 101 is divided into two branches, a part of the refrigerant flows to the electromagnetic switching valve 105 through the flow regulating valve 106, and flows into the first outdoor heat exchanger 131 through a passage from the interface D of the electromagnetic switching valve 105 to the interface E, at this time, the first outdoor heat exchanger 131 is in a defrosting state, the refrigerant flowing out of the first outdoor heat exchanger 131 flows to the second outdoor heat exchanger 132 due to the action of pressure difference, and returns to the compressor 101 through a passage from the interface E of the electromagnetic switching valve 105 to the interface S of the passage four-way valve 104; the other part of the refrigerant at the outlet end of the compressor 101 flows to the indoor heat exchanger 102 through the passage from the D port to the C port of the four-way valve, the indoor heat exchanger 102 is in a heating state, the refrigerant flowing out of the indoor heat exchanger 102 becomes a low-temperature and low-pressure state through the throttling element, flows through the second outdoor heat exchanger 132, the second outdoor heat exchanger 132 is in a cooling state, and the refrigerant flowing out of the second outdoor heat exchanger 132 finally returns to the compressor 101 through the electromagnetic switching valve 105 and the four-way valve 104.

As can be seen from the above, the outdoor heat exchanger is divided into two parts, and the electromagnetic switching valve 105 having three operating positions is combined with the conventional four-way valve 104, so that the heat pump system can have a conventional cooling mode and a heating mode, and can defrost the outdoor heat exchanger without affecting the heating of the indoor heat exchanger 102.

As can be seen from the operation modes of the heat pump system, the electromagnetic switching valve 105 according to the present invention can be switched between three operation positions.

The electromagnetic switching valve 105 includes a valve seat member and a drive member, and the electromagnetic switching valve 105 includes a valve cavity in which a slider member is provided.

The valve seat component is provided with a D interface, an E interface, an S interface and a C interface which can be communicated with the valve cavity; the slider part is provided with a flow passage, the flow passage is provided with two passage openings, and the flow passage is not communicated with the valve cavity and the D interface.

The driving component is used for driving the sliding block component to rotate so as to switch between three working positions and is configured to:

the interface E and the interface S are respectively communicated with two channel openings of the slider component at a first working position, namely the interface E is communicated with the interface S through a circulation channel of the slider component, and the interface C is not communicated with the interface D, so that the interface C is communicated with the interface D through a valve cavity; it can be understood that the first working position is the working position of the electromagnetic switching valve 105 in the first defrosting mode in the heat pump system;

the interface E, the interface S and the interface C are not communicated with a flow channel of the slide block component at the second working position, so that the interface E, the interface S, the interface C and the interface D are communicated with the valve cavity, namely the four interfaces are communicated with each other; it can be understood that the second working position is the working position of the electromagnetic switching valve 105 in the cooling mode and the heating mode in the heat pump system;

the interface E and the interface D are not communicated with the circulation channel, so that the interface E and the interface D are communicated through the valve cavity; it is understood that the third operating position is the operating position of the electromagnetic switching valve 105 in the second defrosting mode in the heat pump system.

The switching of the working mode of the electromagnetic switching valve 105 is realized by driving the sliding block part to rotate through the driving part, the non-differential pressure reversing can be realized, and the working reliability is high.

The following describes the specific structure of the electromagnetic switching valve provided by the present invention in detail with reference to the accompanying drawings.

Referring to fig. 5 to 15, fig. 5 is a schematic structural diagram of an embodiment of an electromagnetic switching valve provided in the present invention; FIG. 6 is a schematic structural view of the electromagnetic switch valve shown in FIG. 5 at another angle; FIG. 7 is a front view of the electromagnetic switching valve of FIG. 5; FIG. 8 is a schematic structural diagram of a driving part of the electromagnetic switching valve shown in FIG. 5; FIG. 9 is a schematic diagram of the structure of the electromagnetic switch valve shown in FIG. 5 in which the sliding member is engaged with the valve seat; FIG. 10 is a schematic structural view of a sliding member of the electromagnetic changeover valve in the embodiment; FIG. 11 is a bottom view of the slide member of FIG. 10; FIG. 12 is a cross-sectional view of the slide member of FIG. 10; FIG. 13 is a schematic diagram showing the relative positions of the sliding member and the valve seat when the electromagnetic switch valve is in the first working position; FIG. 14 is a schematic diagram showing the relative positions of the sliding member and the valve seat when the electromagnetic switching valve is in the second working position; fig. 15 is a schematic diagram showing the relative positions of the sliding member and the valve seat when the electromagnetic switching valve is in the third operating position.

In this embodiment, the electromagnetic switching valve includes a valve seat member 210, a slider member 220, and a drive member.

The valve seat member 210 has a valve cavity 210a, the valve seat member 210 specifically includes a valve seat 211, a valve housing 212 fixedly connected to the valve seat 211, and a valve cover 213 fixedly connected to an upper end of the valve housing 212, the valve housing 212 has a cylindrical structure, and it can be understood that the valve seat 211 and the valve cover 213 close both end openings of the valve housing 212.

The valve seat member 210 includes a valve cavity 210a, in this embodiment, the valve cavity 210a is formed between a valve seat 211, a valve sleeve 212, and a valve cover 213.

In this embodiment, the D port, the E port, the S port, and the C port are all opened on the valve seat 211, and obviously, the four ports are all communicated with the valve cavity 210 a.

The sliding block component 220 is disposed in the valve cavity 210a and is tightly attached to the valve seat 211, wherein a shaft portion 240 is fixedly disposed on the valve seat 211, and the sliding block component 220 is rotatably sleeved on the shaft portion 240.

The slider member 220 has a flow passage 223, both ends of the flow passage 223 respectively form passage ports 224, and after the slider member 220 is sealed and attached to the valve seat 211, the flow passage 223 is not communicated with the valve cavity 210a and the D port. The two channel ports 224 are approximately equal in distance from the E port, S port, and C port. The substantially equal is sufficient to cover the corresponding E/S/C/interface when the slider is rotated to the corresponding position, and it is not required that the distances from the middle point of the channel mouth portion 224 to the middle points of the three interfaces are substantially equal.

The slider member 220 can be rotated about the shaft portion 240 to switch between the three operating positions under the drive of the drive member.

Obviously, the two channel mouth parts 224 of the slider part 220 are in sealing fit with the valve seat 211, that is, the two channel mouth parts 224 are arranged on the bottom surface of the slider part 220 in sealing fit with the valve seat 211; the structural arrangement of the slider component 220 and the layout of the E, S, C and D ports on the valve seat 211 should satisfy:

when the slider member 220 is in the first working position, as shown in fig. 13, the two passage openings 224 of the slider member 220 completely cover the E port and the S port, respectively, so that the E port and the S port are communicated through the flow passage 223, and the E port and the S port are not communicated with the valve cavity 210a, so that the E port and the S port are communicated, and the C port is communicated with the D port through the valve cavity 210 a;

when the slider member 220 is in the second working position, as shown in fig. 14, the E port, the S port, and the C port are all communicated with the valve cavity 210a, that is, the passage opening portion 224 of the slider member 220 does not completely cover any one of the E port, the S port, and the C port; in a preferred scheme, two channel opening parts 224 of the slider part 220 are not overlapped with the interface E, the interface S and the interface C;

when the slider member 220 is in the third operating position, as shown in fig. 15, the two passage openings 224 of the slider member 220 completely cover the S port and the C port, respectively, so that the S port and the C port are communicated through the flow passage 223, and the S port and the C port are not communicated with the valve chamber 210a, so that the S port and the C port are communicated, and the C port is communicated with the D port through the valve chamber 210 a.

In practice, the configuration of the slider member 220, the shape of the flow channel 223 and the channel opening 224 may be designed in various ways as long as the above requirements are satisfied.

It should be noted that, in order to make the overall structure of the electromagnetic switching valve more compact, the slider component 220 is designed to be relatively small, so as to facilitate driving thereof, and meanwhile, in order to reduce the range of the rotation angle of the slider component 220, it is convenient to switch between the aforementioned three working positions, and the S interface is located between the E interface and the C interface.

In this embodiment, the valve seat 211 is further fixedly provided with a first limiting member 261 and a second limiting member 262 for limiting the rotation position of the slider component 220; in a specific embodiment, the first limiting member 261 and the second limiting member 262 are both shaft-shaped structures fixedly inserted into the valve seat 211.

Specifically, when the slider component 220 rotates to abut against the first limiting member 261, the slider component 220 is in the first working position, as can be understood from fig. 9 and 13, and when the slider component 220 rotates to abut against the second limiting member 262, the slider component 220 is in the third working position, as can be understood from fig. 9 and 15, the slider component 220 may be in the second working position after rotating a certain angle from the first working position, as shown in fig. 14, and then is in the third working position when rotating to abut against the second limiting member 262 from the second working position; when the slider part 220 rotates reversely, the slider part can sequentially pass through the third working position and the second working position to reach the first working position; thus, the rotation angle of the slider component 220 from the first working position to the second working position and the rotation angle of the slider component 220 from the third working position to the second working position are determined, and after the first limiting member 261 and the second limiting member 262 are arranged, the relative position of the slider component 220 can be determined, and the rotation control of the slider component 220 by the driving component is facilitated.

During specific setting, the rotation angle of the slider component 220 from the first working position to the second working position is equal to the rotation angle of the slider component 220 from the second working position to the third working position, so as to facilitate the control of the driving component.

In this embodiment, the shaft portion 240 is specifically fixed to the central axis of the valve seat 211, i.e. the slider member 220 rotates around the central axis of the valve seat 211; the E, S and C interfaces are distributed around the shaft part 240.

In this embodiment, the flow channel 223 of the slider component 220 is specifically in a U-shape, or in an arc shape, two ports of the flow channel 223 form two channel openings 224, the slider component 220 only has two channel openings 224 and the valve seat 211 is in sealing fit, thus, the contact area between the slider component 220 and the valve seat 211 is reduced as much as possible on the basis of meeting the relevant requirements, the friction force between the two is reduced, which is beneficial to improving the driving performance, and meanwhile, the form can reduce the volume of the slider component 220 as much as possible, thereby facilitating the driving of the slider component 220, and being beneficial to the miniaturization design of the electromagnetic switching valve.

Of course, the flow channel 223 of the slider part 220 may also be designed in other shapes.

In a specific embodiment, as shown in fig. 10, the slider component 220 includes a slider seat portion 221 and a U-shaped channel portion 222, wherein the flow channel 223 is formed in the U-shaped channel portion 222, the slider seat portion 221 includes two interface portions that are matched with two channel ports of the U-shaped channel portion 222, and the U-shaped channel portion 222 is embedded in the slider seat portion 221 by injection molding, it can be understood that the two channel ports of the U-shaped channel portion 222 are respectively connected with the two interface portions of the slider seat portion 221 in a sealing manner, and the two interface portions of the slider seat portion 221 are the aforementioned channel port portions 224.

As above, the slider part 220 is arranged separately, which facilitates processing; the U-shaped channel 222 may be made of metal material such as stainless steel, copper, etc., or may be made of non-metal material such as PPS, etc.

To avoid blocking the S-port when the slider part 220 is in the second working position, the bottom of the slider seat part 221 has an upwardly concave recess 2212, which recess 2212 is located between the two port parts, and in the second working position, the recess 2212 is located at least partially above the S-port. As shown in fig. 10 and 12, as can be understood from fig. 9, only two interface portions of the slider member 220 are in sealing contact with the valve seat 211, when the slider member 220 is in the second working position, the two interface portions are respectively located between the E interface and the S interface, and between the C interface and the S interface, and the design of the concave portion 2212 makes the slider member 220 form a space avoiding the S interface, so as to ensure that the S interface can communicate with the valve cavity 210 a.

The slider part 220 further comprises a support part between the two interfacing parts for cooperating with the shaft part 240, while the U-shaped channel part 222 passes through the support part, which may provide support for the U-shaped channel part 222.

Of course, the slider member 220 may be formed as an integrally molded part in practice.

In this embodiment, the driving member includes a driving source 230 and a gear reduction mechanism 250, and the driving source 230 drives the slider member 220 to rotate around the shaft portion 240 through the gear reduction mechanism 250.

In a specific embodiment, the driving source 230 may include a rotor member, a coil, and a housing, the housing may be fixed to the upper end of the valve cover 213, and the lower end of the output shaft 231 of the rotor member extends into the valve chamber 210a through the valve cover 213 to cooperate with the gear reduction mechanism 250, i.e., the gear reduction mechanism 250 is disposed in the valve chamber 210 a.

The first gear 232 is fixed to the lower end of the output shaft 231 of the driving source 230, and specifically, the first gear 232 may be a relatively independent component and fixed to the output shaft 231 in a fixed connection manner, or the first gear 232 may be directly formed at the lower end of the output shaft 231, that is, integrally formed with the output shaft 231.

The gear reduction mechanism 250 includes an input gear 251 engaged with the first gear 232, an intermediate gear 257 engaged with the input gear 251, and an output gear 252 engaged with the intermediate gear 257, wherein the output gear 252 is externally sleeved on the shaft portion 240 and can drive the slider member 220 to rotate synchronously.

The intermediate gear 257 of the gear reduction mechanism 250 may be one gear member, or may be two or more gear members in transmission connection, which may be determined according to actual requirements.

Wherein, the input gear 251 and the intermediate gear 257 are both an integrated large gear and small gear structure coaxially arranged, which can be understood by referring to fig. 7 and 8, and the intermediate gear 257 includes two gear components as an example for explanation: the large gear of the input gear 251 meshes with the first gear 231, the small gear of the input gear 251 meshes with the large gear of a first intermediate gear, the small gear of the first intermediate gear meshes with the large gear of a second intermediate gear, and the small gear of the second intermediate gear meshes with the output gear 252. Thus, the first gear 231, the input gear 251, the first intermediate gear, the second intermediate gear and the output gear 252 are driven to rotate the slider component 220, so as to realize the reversing of the electromagnetic switching valve.

In a specific scheme, the gear reduction mechanism 250 further includes a support plate located between the valve cover 213 and the valve seat 211, the support plate is fixedly connected with the valve cover 213 through a support shaft 255, a plurality of gear shafts 256 are fixedly inserted on the support plate, and each gear of the gear reduction mechanism 250 is sleeved on the corresponding gear shaft 256.

In the illustrated embodiment, the gear reduction mechanism 250 specifically includes two support plates, namely a first support plate 253 and a second support plate 254, specifically, the first support plate 253 and the second support plate 254 are spaced by a certain distance, and the first support plate 253 is located above the second support plate 254. The first support plate 253 and the second support plate 254 are fixedly connected with the valve cover 213 through a plurality of support shafts 255 to stably support gears of the gear acceleration mechanism 250, specifically, one end of the same support shaft 255 is fixedly connected with the second support plate 254, the other end of the same support shaft 255 passes through the first support plate 253 and then is fixedly connected with the valve cover 213, and the gear shaft 256 is fixedly inserted between the first support plate 253 and the second support plate 254 or between the second support plate 254 and the valve cover 213 according to the position of the corresponding gear and passes through the first support plate 253.

In this embodiment, the bottom of the output gear 252 of the gear reduction mechanism 250 is provided with a limit groove 2522, specifically, the bottom of the output gear 252 is provided with two convex portions 2521, and the limit groove 2522 is formed between the two convex portions 2521, as shown in fig. 8; the top of the slider member 220 is provided with a limit portion 2211 engaged with the limit groove 2522, and the limit portion 2211 of the slider member 220 is engaged with the limit groove 2522 of the output gear 252, so that the slider member 220 can be synchronously driven to rotate when the output gear 252 rotates.

Of course, the output gear 252 and the slider member 220 may be connected in other manners as long as the output gear 252 can drive the slider member 220 to rotate synchronously.

The electromagnetic switching valve and the heat pump system with the same provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.