CN112013562A

CN112013562A - Electromagnetic switching valve and heat pump system with same

Info

Publication number: CN112013562A
Application number: CN201910469688.0A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-12-01

Abstract

The invention discloses an electromagnetic switching valve and a heat pump system with the same, wherein the electromagnetic switching valve comprises a valve sleeve, a valve seat, a sliding block and a connecting rod assembly; the valve comprises a valve cavity, a valve seat, a sliding block and a connecting rod assembly are arranged in the valve cavity, and the valve cavity is provided with a D interface communicated with the valve cavity; the bottom surface of the sliding block is tightly pressed and attached to the valve seat and can slide along the valve seat under the drive of the connecting rod assembly; the valve seat is provided with an E, S, C interface; the slide can switch between three working positions: the interface E is communicated with the interface S through an inner cavity of the sliding block, and the interface C is not communicated with the inner cavity of the sliding block; the E, S, C interfaces are communicated with the inner cavity of the sliding block when the sliding block is positioned at the second working position; and the interface S is communicated with the interface C through an inner cavity of the sliding block, and the interface E is not communicated with the inner cavity of the sliding block. The electromagnetic switching valve has three working positions, is applied to a heat pump system, can realize defrosting operation of an outdoor unit under the condition that the working condition of an indoor heat exchanger and an outdoor heat exchanger is not changed, and reduces energy loss.

Description

Electromagnetic switching valve and heat pump system with same

Technical Field

The invention relates to the technical 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, high-temperature high-pressure gas is in an outdoor heat exchanger, heat is released to the outdoor environment, and low-temperature low-pressure gas is not in an indoor heat exchanger, so that heat of the indoor environment is; 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. Like this, in the defrosting in-process, what indoor heat exchanger passed through is low temperature low pressure gas, for refrigerating state, will lead to the loss of indoor heat supply volume, reduces the comfort level simultaneously.

In view of this, how to implement the defrosting operation of the outdoor unit without changing the indoor heating state is a technical problem that needs to be faced by those skilled in the art.

Disclosure of Invention

The invention provides an electromagnetic switching valve which comprises a valve sleeve, a valve seat, a sliding block and a connecting rod assembly, wherein the electromagnetic switching valve comprises a valve cavity, and the valve seat, the sliding block and the connecting rod assembly are arranged in the valve cavity; the valve pocket is provided with a D interface communicated with the valve cavity;

the bottom surface of the sliding block is tightly pressed and attached to the valve seat, and can slide along the valve seat under the drive of the connecting rod assembly; the valve seat is provided with an E interface, an S interface and a C interface;

the slider is switchable between three operating positions and is configured to:

the interface E is communicated with the interface S through an inner cavity of the sliding block, and the interface C is not communicated with the inner cavity of the sliding block;

the E interface, the S interface and the C interface are all communicated with the inner cavity of the sliding block;

and the interface S and the interface C are communicated through the inner cavity of the sliding block, and the interface E is not communicated with the inner cavity of the sliding block.

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

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;

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 the second branch is also provided with a flow regulating valve.

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;

5-1, 5-2, and 5-3 are schematic structural diagrams of the electromagnetic switching valve in the first embodiment of the present invention under three operating modes, respectively;

6-1, 6-2, and 6-3 are schematic structural diagrams of the electromagnetic switching valve in the second embodiment of the present invention under three operating modes, respectively;

fig. 7-1, 7-2, and 7-3 are schematic structural diagrams of the electromagnetic switching valve in a third embodiment of the present invention in three operating modes, respectively;

8-1, 8-2, and 8-3 are schematic structural diagrams of the electromagnetic switching valve in a fourth embodiment of the present invention under three operating modes, respectively;

fig. 9-1, 9-2, and 9-3 are schematic structural diagrams of the electromagnetic switching valve in a fifth embodiment of the present invention in three operating modes, respectively.

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;

the valve housing 210, the valve seat 220, the slider 230, the connecting rod assembly 240, the connecting rod 241, the piston 242, the first end cap 250, and the second end cap 260;

a pilot valve 270;

the device comprises a limiting component 280, a limiting component 281, a driving component 282, an electromagnetic coil 2821, a static iron core 2822 and a reset elastic component 2823;

a driving element II 283, a coil 2831, a rotor component 2832, a screw rod 2833, a nut 2834, a valve body 2835 and a shell 2836;

a first control element 291, a first limiting element 2911, a second control element 292, and a second limiting element 2921.

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 is provided in conjunction with the electromagnetic switching valve and the heat pump system having the same, and the beneficial 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. Arrows in the figure indicate the flow direction of the refrigerant.

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 improved electromagnetic switching valve based on the existing four-way valve, and has three working positions, which are described in the following in detail in 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 a throttle valve 106 is further disposed on the second branch, specifically, the throttle valve 106 may be an expansion valve to adjust the flow rate 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 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 in an operating position where the ports D and E are communicated and the ports C and S are communicated, and the electromagnetic switching valve 105 is in an operating position where the ports E, S and C are communicated with each other.

Since the D interface of the electromagnetic switching valve 105 is in a closed state, the flow regulating valve 106 can be closed in practical application, and it is also feasible to regulate the flow regulating valve 106 to a smaller opening degree; the high-temperature high-pressure refrigerant at the outlet end of the compressor 101 mainly 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 of the electromagnetic switching valve 105 is communicated with the E port and the C port thereof, 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, both the 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 low-pressure state through a throttling element, passes through the indoor heat exchanger 102, the indoor heat exchanger 102 is in a cooling state at.

Heating mode

As shown in fig. 2, in the heating mode, the four-way valve 104 is in an operating position where the ports D and C are communicated and the ports E and S are communicated, and the electromagnetic switching valve 105 is in an operating position where the ports E, S and C are communicated with each other.

Because the D interface of the electromagnetic switching valve 105 is in a closed state, the flow regulating valve 106 can be closed during actual application, and the flow regulating valve 106 can be regulated to a smaller opening degree; the high-temperature and high-pressure refrigerant at the outlet end of the compressor 101 mainly 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 the 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 the working position where the port E is communicated with the port S and the port D is communicated with the port C.

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, after a part of the refrigerant is regulated by the flow regulating valve 106, the refrigerant flows into the second outdoor heat exchanger 132 through the passage from the interface D to the interface C of the electromagnetic switching valve 105, at this time, 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 the passage from the interface E of the electromagnetic switching valve 105 to the interface S and the passage from the interface E of the four-way valve 104 to the interface S; 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 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 becomes a low-temperature and low-pressure state after passing through 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 in the working position where the D port is communicated with the C port and the E port is communicated with the S port, and the electromagnetic switching valve 105 is in the working position where the D port is communicated with the E port and the C port is communicated with the S port.

The high temperature and high pressure refrigerant at the outlet end of the compressor 101 is divided into two branches, after a part of the refrigerant is adjusted by the flow control valve 106, the refrigerant flows into the first outdoor heat exchanger 131 through the passage from the interface D to the interface E of the electromagnetic switching valve 105, 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 effect of pressure difference, and returns to the compressor 101 through the passage from the interface E to the interface S of the passage four-way valve 104 from the interface C of the electromagnetic switching valve 105 to the interface S; 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.

According to the working modes of the upper heat pump system, the electromagnetic switching valve 105 provided by the invention can be switched among three working positions, and comprises a valve pocket, a valve seat, a sliding block, a connecting rod assembly and a valve cavity, wherein the valve seat, the sliding block and the connecting rod assembly are arranged in the valve cavity; the valve seat is provided with an E interface, an S interface and a C interface; the slider compresses tightly on the valve seat sealedly, and can slide along the valve seat under the drive of link assembly to switch between three operating position, and configure into:

the interface E is communicated with the interface S through an inner cavity of the sliding block, and the interface C is not communicated with the inner cavity of the sliding block, namely 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 communicated with the inner cavity of the sliding block, namely the interface E, the interface S and the interface C 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 is communicated with the inner cavity of the sliding block, namely the interface E is communicated with the interface D through a 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 following describes the specific structure of the electromagnetic switching valve provided by the present invention in detail with reference to the accompanying drawings.

Example 1

Referring to fig. 5-1, fig. 5-2, and fig. 5-3, fig. 5-1, fig. 5-2, and fig. 5-3 are schematic structural diagrams of the electromagnetic switching valve in the first embodiment of the present invention under three operating modes, respectively.

In this embodiment, the solenoid-operated switching valve includes a main valve and a pilot valve 270, wherein the structure of the pilot valve 270 may adopt the structure of a conventional four-way valve, and will not be described in detail.

The main valve of the electromagnetic switching valve includes a valve housing 210 having a tubular structure, a valve seat 220 fixedly disposed on the valve housing 210, a slider 230 sealingly pressed on the valve seat 220, and a connecting rod assembly 240.

The valve sleeve 210 is provided with a D interface which is communicated with a pilot valve cavity of the pilot valve 270 through a capillary tube D; the valve seat 220 has an E port, an S port, and a C port.

The connecting rod assembly 240 comprises a connecting rod 241 matched with the sliding block 230 and pistons 242 arranged at two ends of the connecting rod 241, the two pistons 242 are matched with the valve pocket 210 to divide the valve cavity of the valve pocket 210 into a left chamber, a middle chamber and a right chamber, the left chamber is communicated with a left interface of the pilot valve 270 through a capillary tube e, a D interface is particularly communicated with the middle chamber, the right chamber is communicated with a right interface of the pilot valve 270 through a capillary tube c, and an S interface is communicated with a middle interface of the pilot valve 270 through a capillary tube S.

The terms of left, middle and right directions and the like in the drawings are defined by the parts in the drawings and the mutual positions of the parts, and are only used for the clarity and convenience of the technical scheme; the following relates to the directional terms again similarly; it is to be understood that the use of the directional terms should not be taken to limit the scope of the present application.

The pilot valve 270 controls the communication state between the capillaries through the on/off power of the coil thereof, thereby controlling the pressure difference between the two ends of the connecting rod assembly 240 to switch the sliding direction of the connecting rod assembly 240, and further driving the slider 230 to slide to switch the working position of the electromagnetic switching valve.

The electromagnetic switching valve further comprises a limiting component 280, and the limiting component 280 is specifically arranged on one side of the valve seat 220.

The limiting component 280 includes a limiting component 281 and a driving component one 282, where the driving component one 282 can drive the limiting component 281 to switch between two working states so as to limit the sliding position of the connecting rod assembly 240 when sliding towards the side of the limiting component 280, and is configured to:

the limiting member 281 is in the first working state, and the limiting member 281 can abut against the connecting rod assembly 240, so that the sliding block 230 is in the second working position;

the limiting member 281 is in the second working state, and the link assembly 240 can slide to a position where the slider 230 is in the first working position or the third working position.

End caps are affixed to both ends of the valve housing 210. in this embodiment, the stop member 280 is specifically mounted to one end cap of the valve housing 210. to facilitate the engagement of the stop member 280 with the end caps, the two end caps differ in structure, referred to herein as the first end cap 250 and the second end cap 260, wherein the stop member 280 is specifically mounted to the second end cap 260.

In the illustrated embodiment, the second end cap 260 is disposed on the right side of the valve housing 210, specifically, outside the C-port of the valve seat 220.

Specifically, the limiting member 281 is inserted into and engaged with the second end cap 260, and the first driving member 282 can drive the limiting member 281 to extend and retract along the axial direction of the valve sleeve 210 so as to switch between a first working state and a second working state, wherein in the first working state, the limiting member 281 moves towards the valve seat 220 to be in the extended position, and in the second working state, the limiting member 281 moves away from the valve seat 220 to be in the retracted position.

In this embodiment, the driving member one 282 includes an electromagnetic coil 2821, a stationary core 2822 and a return elastic member 2823 disposed between the stationary core 2822 and the limiting member 281, and the return elastic member 2823 may be a spring.

The limiting member 281 can move telescopically under the action of electromagnetic force and the return elastic member 2823 to switch between two working states.

In this embodiment, the driving member one 282 is specifically configured to: when the electromagnetic coil 2821 is energized, under the action of electromagnetic force, the limiting member 281 overcomes the elastic force of the return elastic member 2823 to attract the stationary core 2822, and at this time, the limiting member 281 moves away from the valve seat 220 and is located at a retraction position; when the solenoid 2821 is de-energized, the stopper 281 is moved toward the valve seat 220 to be in the extended position by the elastic force of the return elastic member 2823.

In this embodiment, the position-limiting member 281 is specifically configured as a pillar structure.

It is understood that the limiting member 280 formed by the limiting member 281 and the driving member 282 in this embodiment is similar to the structure of a direct-acting solenoid valve.

During assembly, the driving member 282 further includes a sleeve, the sleeve is fixedly inserted into the second end cap 260, the position-limiting member 281 and the stationary core 2822 are inserted into the sleeve, and the electromagnetic coil 2821 is externally sleeved on the sleeve.

To improve the reliability between the stopper 280 and the second end cap 260, the edge of the through hole of the second end cap 260 fitted into the sleeve may be formed as a guide cylinder portion extending in the axial direction of the valve housing 210.

In practical application, as shown in fig. 5-1, the capillary D is communicated with the capillary c and the capillary e is communicated with the capillary S by switching through the pilot valve 270, so that the interface D is communicated with the right chamber of the valve housing 210 and the interface S is communicated with the left chamber of the valve housing 210, so that the right end of the connecting rod assembly 240 is a high pressure area and the left end is a low pressure area, under the action of the pressure difference, the connecting rod assembly 240 moves towards the left side until the piston 242 at the left end of the connecting rod assembly 240 abuts against the first end cap 250 at the left side, and the solenoid 2821 of the driving part one 282 of the limiting part 280 is in a power; at this time, the slider 230 is at the left end position, the E port is communicated with the S port through the inner cavity of the slider 230, the C port is communicated with the D port through the valve cavity, and the electromagnetic switching valve is at the first working position, that is, the working position of the electromagnetic switching valve in the first defrosting mode in the heat pump system.

It will be appreciated that in the state shown in fig. 5-1, since the link assembly 240 moves toward the side where the limiting member 280 is not provided, whether the limiting member 281 is in the extended position or the retracted position does not affect the movement of the link assembly 240 toward the left side.

As shown in fig. 5-2, the capillary D is communicated with the capillary E by switching through the pilot valve 270, the capillary S is communicated with the capillary C, so that the interface D is communicated with the left chamber of the valve housing 210, the interface S is communicated with the right chamber of the valve housing 210, so that the left end of the connecting rod assembly 240 is switched to a high pressure area, the right end is a low pressure area, the connecting rod assembly 240 moves towards the right side under the action of the pressure difference, at this time, the solenoid 2821 of the driving part one 282 of the limiting part 280 is in a power-off state, the limiting part 281 is in an extended position, i.e. the limiting part 281 extends towards the valve seat 220, the connecting rod assembly 240 moves towards the right side, i.e. towards the side where the limiting part 280 is located, since the limiting part 281 extends towards the valve seat 220, the connecting rod assembly 240 moves to a position abutting against the limiting part 281, the interface D is not communicated with the interface E, the interface S and the interface C, and the electromagnetic switching valve is located at a second working position, namely the working position of the electromagnetic switching valve in the refrigeration mode and the heating mode in the heat pump system.

It can be understood that, in a specific arrangement, the limit-limiting member 281 and the connecting rod assembly 240 are cooperatively arranged, so that the E-interface, the S-interface and the C-interface can communicate with each other through the inner cavity of the sliding block 230 when the limit-limiting member 281 is in the extended position and the connecting rod assembly 240 abuts against the limit-limiting member.

As shown in fig. 5-3, the state in which the pilot valve 270 is switched corresponds to that shown in fig. 5-2, that is, the link assembly 240 has a high pressure region at the left end and a low pressure region at the right end, the link assembly 240 moves to the right side, in fig. 5-3, the electromagnetic coil 2821 of the driving member one 282 of the position-limiting member 280 is in the energized state, the position-limiting member 281 is under the action of electromagnetic force, and is attracted to the static iron core 2822 to be in the retracted position, the linkage assembly 240 may thus continue to move to the right from the position shown in fig. 5-2 until it abuts the second end cap 260 and/or the stop 281, at which point, the slide block 230 is at the right end position, the S port is communicated with the C port through an inner cavity of the slide block 230, the E port is communicated with the D port through a valve cavity, and the electromagnetic switching valve is at a third working position, that is, the working position of the electromagnetic switching valve in the second defrosting mode in the heat pump system.

During operation, the connecting rod assembly 240 needs to abut against an end cap to define an operating position when sliding, generally, the middle portion of the first end cap 250 without the limiting member 280 is a structure protruding into the valve cavity to form a portion abutting against the connecting rod assembly 240, and the second end cap 260 with the limiting member 280 is inserted into the limiting member 281 of the limiting member 280, so that a through hole needs to be formed in the middle portion thereof, and a structure protruding into the valve cavity cannot be formed, and therefore, in this embodiment, the peripheral wall portion of the second end cap 260 is embedded in the valve housing 210, and the inner end surface of the peripheral wall portion thereof can form a portion abutting against the connecting rod assembly 240.

In the state shown in fig. 5-3, in which the retaining member 281 is in the retracted position, which is still present in the portion located in the valve chamber, the connecting-rod assembly 240 abuts both the second end cap 260 and the retaining member 281.

It can be understood that, in actual setting, the limiting member 281 may not extend into the valve cavity, or may extend into the valve cavity and be closer to the valve seat 220 than the inner end surface of the second end cap 260, as long as the connecting rod assembly 240 moves to the rightmost end position, the S port and the C port can be communicated through the inner cavity of the slider 230, and the E port and the D port can be communicated.

In fig. 5-1 to 5-3, the limiting member 280 is specifically located at the side of the C port of the valve seat 220, and it can be understood that, in actual installation, the limiting member 280 may also be located at the side of the E port of the valve seat 220, that is, the limiting member 280 is installed at the left end of the valve sleeve 210.

Example 2

Referring to fig. 6-1, fig. 6-2, and fig. 6-3, fig. 6-1, fig. 6-2, and fig. 6-3 are schematic structural diagrams of the electromagnetic switching valve in the second embodiment of the present invention under three operating modes, respectively.

In this embodiment, the main structural composition of the electromagnetic switching valve is the same as that of embodiment 1, and the same portions are not repeated here, but the two are different in that: the position and structure of the stopper member 280 are different.

In this embodiment, the limiting member 280 is specifically installed on the valve housing 210, and is located at the right side of the valve housing 210, and is also located at the outer side of the C-port of the valve seat 220.

In this embodiment, the position limiting component 280 includes a position limiting component 281 and a first driving component 282, wherein the structural composition of the first driving component 282 is the same as that of embodiment 1.

In this embodiment, the limiting member 281 is specifically inserted into and engaged with the valve housing 210, and the limiting member 281 can extend and retract along a direction perpendicular to the axial direction of the valve housing 210 under the action of the driving member one 282 to switch between a first working state and a second working state, wherein in the first working state, the limiting member 281 passes through the wall portion of the valve housing 210 and extends into the valve cavity to be in the extended position, and in the second working state, the limiting member 281 moves away from the valve cavity to exit the valve cavity to be in the retracted position.

Specifically, the sleeve of the first driving member 282 is fixedly connected to the valve housing 210.

In this embodiment, since the limiting member 281 needs to be inserted into and engaged with the valve sleeve 210, in order to ensure the reliability of the engagement between the limiting member 281 and the valve sleeve 210 and to facilitate the installation, the end of the limiting member 281, which is engaged with the valve sleeve 210, may be provided with a protrusion with a smaller size, which is inserted into and engaged with the valve sleeve 210, and in the first operating state, the protrusion extends into the valve cavity, and in the second operating state, the protrusion exits from the valve cavity.

Since the position limiting member 280 is installed in the valve housing 210, in actual installation, the end caps at both ends of the valve housing 210 have the same structure and are the first end cap 250.

As shown in fig. 6-1, when the pilot valve 270 is switched to make the right end of the connecting rod assembly 240 be a high pressure area and the left end be a low pressure area, the connecting rod assembly 240 moves to the left side, the piston 242 at the left end abuts against the first end cap 250 at the left side, and the solenoid 2821 of the driving member-one 282 of the limiting member 280 is in a power-off state; at this time, the E port is communicated with the S port through the inner cavity of the slider 230, the C port is communicated with the D port through the valve cavity, and the electromagnetic switching valve is in the first working position.

As shown in fig. 6-2, the pilot valve 270 switches to make the right end of the connecting rod assembly 240 be a low pressure region and the left end be a high pressure region, the connecting rod assembly 240 moves towards the right side, the electromagnetic coil 2821 of the driving element one 282 of the limiting component 280 is in a power-off state, the limiting component 281 extends out towards the inside of the valve cavity through the wall portion of the valve sleeve 210, the connecting rod assembly 240 moves rightwards to abut against the limiting component 281 and stops moving, at this time, the E port, the S port and the C port are mutually communicated through the inner cavity of the slider 230, the D port is not communicated with the E port, the S port and the C port.

As shown in fig. 6-3, the switching state of the pilot valve 270 is the same as that of fig. 6-2, the left end of the connecting rod assembly 240 is a high pressure region, the right end of the connecting rod assembly 240 is a low pressure region, the connecting rod assembly 240 moves to the right, but at this time, the electromagnetic coil 2821 of the driving member one 282 of the limiting member 280 is in an energized state, the limiting member 281 is under the action of electromagnetic force and attracts the static iron core 2822 to be in a retracted state, without interfering with the movement of the connecting rod assembly 240, the connecting rod assembly 240 can move to the right to abut against the first end cap 250 on the right side, at this time, the S port is communicated with the C port through the inner cavity of the sliding block 230.

In the embodiments shown in fig. 6-1 to 6-3, the position-limiting component 280 is specifically located at the side of the C port of the valve seat 220, and it can be understood that, in actual installation, the position-limiting component 280 may also be located at the side of the E port of the valve seat 220.

In the illustrated embodiment, the limiting member 280 and the pilot valve 270 are separately disposed on two sides of the valve housing 210, and it will be appreciated that in practice, the limiting member 280 may be disposed on the same side as the pilot valve 270 if space permits, or the limiting member 280 may be disposed at other positions on the circumference of the valve housing 210.

Example 3

Referring to fig. 7-1, fig. 7-2, and fig. 7-3, fig. 7-1, fig. 7-2, and fig. 7-3 are schematic structural diagrams of an electromagnetic switching valve in a third embodiment of the present invention under three operating modes, respectively.

In this embodiment, the main structural composition of the electromagnetic switching valve is the same as that of embodiment 1, and the same portions are not repeated here, but the two are different in that: the specific structure of the stopper member 280.

As in embodiment 1, in this embodiment, the limiting component 280 is specifically mounted on the end cap and is also disposed on the right side of the valve sleeve 210, the limiting component 281 of the limiting component 280 is inserted into and engaged with the second end cap 260, and the limiting component 281 is in a rod-shaped structure and can extend and retract along the axial direction of the valve sleeve 210 under the action of the driving member to switch between the first working state and the second working state.

In this embodiment, the structural composition of the driving member of the position limiting member 280 is different from that of embodiment 1, and here, the second undriven member 283 is marked.

The second driving element 283 comprises a coil 2831, a rotor part 2832, a screw 2833 and a nut 2834; the screw 2833 is fixedly connected with the rotor component 2832 and can rotate together with the rotor component 2832, the screw 2833 is in threaded fit with the nut 2834, the limiting part 281 is connected with the screw, the coil 2831 is used for driving the rotor component 2832 to rotate, and the screw 2833 is driven to rotate together, and the screw 2833 is in threaded fit with the nut 2834, so that the screw 2833 can move axially while rotating, and the limiting part 281 is driven to do axial telescopic motion along the screw 2833; it will be appreciated that the axial direction of the screw 2833 is parallel to the axial direction of the valve housing 210, so that the retainer 281 can move in the axial direction of the valve housing 210 to approach or separate from the valve seat 220.

Wherein, the rotation direction of the rotor member 2832 is controlled by the coil 2831 to control the stopper 281 to move close to the valve seat 220 or move away from the valve seat 220.

Similarly, in the first operating state, the limiting member 281 moves toward the valve seat 220 to be in the extended position, and in the second operating state, the limiting member 281 moves away from the valve seat 220 to be in the retracted position.

In a specific embodiment, the second driving element 283 further includes a valve body 2835, the valve body 2835 is fixedly connected to the second end cap 260, and the nut 2834 is fixedly connected to the valve body 2835, so as to ensure that the lead screw 2833 can drive the position-limiting member 281 to move axially along the valve housing 210 through the thread fit with the nut 2834.

The valve body 2835 also has a guide hole through which the stopper 281 passes so as to guide the movement of the stopper 281.

The second driving element 283 further includes a casing 2836, the casing 2836 is fixedly connected to the valve body 2835, the rotor component 2832, the lead screw 2833, the nut 2834 and other components can be disposed in the casing 2836, and the coil 2831 is sleeved on the casing 2836.

Specifically, the second end cap 260 is fixed to the valve body 2835 by inserting, and the limiting member 281 is fitted to the valve body 2835 by inserting.

It is understood that the limiting component 280 formed by the limiting component 281 and the driving component 283 in this embodiment is similar to the structure of an electronic expansion valve, and the specific connection relationship of the relevant components can be set with reference to the electronic expansion valve.

As shown in fig. 7-1, the pilot valve 270 is switched to make the right end of the connecting rod assembly 240 be a high pressure area and the left end be a low pressure area, the connecting rod assembly 240 moves towards the left side, the piston 242 at the left end of the connecting rod assembly abuts against the first end cap 250 at the left side, the second driving member 282 of the limiting component 280 controls the limiting member 281 to be at the retraction position, at this time, the E port and the S port are communicated through the inner cavity of the sliding block 230, the C port is communicated with the D port through the valve cavity, and the electromagnetic switching valve is at the first.

As shown in fig. 7-2, the pilot valve 270 switches to make the right end of the connecting rod assembly 240 be a low pressure region and the left end be a high pressure region, the connecting rod assembly 240 moves towards the right side, the second driving element 283 of the limiting component 280 controls the limiting member 281 to move towards the valve seat 220 to be in the extended position, the connecting rod assembly 240 moves towards the right to abut against the limiting member 281 and then stops moving, at this time, the E port, the S port and the C port are communicated with each other through the inner cavity of the slider 230, the D port is not communicated with the E port, the S port and the C port, and the electromagnetic switching.

As shown in fig. 7-3, the pilot valve 270 is switched in the same manner as in fig. 7-2, the connecting rod assembly 240 moves to the right, but at this time, the second driver 283 of the limiting member 280 controls the limiting member 281 to move away from the valve 220 to be in the retracted position, the connecting rod assembly 240 can move to the right to abut against the second end cap 260 and/or the limiting member 281, at this time, the S port and the C port are communicated through the inner cavity of the slider 230, the E port and the D port are communicated through the valve cavity, and the solenoid-operated valve is in the third working position.

Similar to the foregoing embodiment 1, in this embodiment, the middle portion of the first end cap 250 is a structure protruding into the valve cavity to form a portion abutting against the connecting rod assembly 240, and the second end cap 260 needs to be provided with an installation through hole in the middle portion due to installation and matching with the limiting member 280, so that the peripheral wall portion of the second end cap 260 embedded in the valve housing 210 can form a limiting structure for limiting the connecting rod assembly 240 to the third operating position; similarly, the limiting member 281 may also form a limiting structure for limiting the connecting rod assembly 240 to the third operating position when the limiting member 281 is in the retracted position.

In this embodiment, the limiting member 280 is specifically located at the side of the C port of the valve seat 220, and it can be understood that, in actual installation, the limiting member 280 may also be located at the side of the E port of the valve seat 220, that is, the limiting member 280 is installed at the left end of the valve sleeve 210 in the figure.

Example 4

Referring to fig. 8-1, 8-2 and 8-3, fig. 8-1, 8-2 and 8-3 are schematic structural diagrams of an electromagnetic switching valve in a fourth embodiment of the present invention under three operating modes, respectively.

In this embodiment, the main structural composition of the electromagnetic switching valve is the same as that of embodiment 3, and the same portions are not repeated here, but the two are different in that: the installation position of the stopper member 280 is different.

In this embodiment, the structure of the position limiting component 280 is the same as that of embodiment 3, and includes a position limiting component 281 and a second driving component 283, which are rod-shaped structures.

In this embodiment, the limiting member 281 is specifically inserted into and engaged with the valve housing 210, and the limiting member 281 can extend and retract along a direction perpendicular to the axial direction of the valve housing 210 under the action of the second driving member 283 to switch between a first working state and a second working state, wherein in the first working state, the limiting member 281 passes through the wall portion of the valve housing 210 and extends into the valve cavity to be in the extended position, and in the second working state, the limiting member 281 moves away from the valve cavity to exit the valve cavity to be in the retracted position.

Specifically, the valve body 2835 of the driving member two 283 is fixedly connected with the valve sleeve 210. The valve sleeve 210 has a through hole matching with the guiding hole of the valve body 2835 for the limiting member 281 to pass through.

In this embodiment, the position limiting member 280 is installed on the valve housing 210, so that in actual installation, the end cap structures at both ends of the valve housing 210 can be the same and are both the first end cap 250.

As shown in fig. 8-1, when the pilot valve 270 is switched to make the right end of the connecting rod assembly 240 be a high pressure area and the left end be a low pressure area, the connecting rod assembly 240 moves to the left side, the piston 242 at the left end of the connecting rod assembly abuts against the first end cover 250 at the left side, and the limiting member 281 of the limiting member 280 is controlled by the second driving member 283 to extend into the valve cavity to be at an extending position; at this time, the E port is communicated with the S port through the inner cavity of the slider 230, the C port is communicated with the D port through the valve cavity, and the electromagnetic switching valve is in the first working position.

As shown in fig. 8-2, the right end of the connecting rod assembly 240 is a low pressure region and the left end is a high pressure region through the switching of the pilot valve 270, the connecting rod assembly 240 moves towards the right side, the limiting member 281 is still located at an extending position extending into the valve cavity under the control of the driving member two 283, the connecting rod assembly 240 moves towards the right side until being abutted against the limiting member 281 and then stops moving, at this time, the E port, the S port and the C port are communicated with each other through the inner cavity of the slider 230, the D port is not communicated with the E port, the S port and the C port, and the electromagnetic switching valve is located at.

As shown in fig. 8-3, the pilot valve 270 is switched in a state consistent with that shown in fig. 8-2, the connecting rod assembly 240 is subjected to a pressure difference force towards the right and moves towards the right, but at this time, the limiting member 281 is controlled by the second driving member 283 to be in a retracted position exiting the valve cavity and not to interfere with the movement of the connecting rod assembly 240, the connecting rod assembly 240 can move towards the right to abut against the first end cover 250 on the right, at this time, the S port is communicated with the C port through the inner cavity of the sliding block 230, the E port is communicated with the D port through the valve cavity, and the solenoid switching valve is.

In this embodiment, the position-limiting component 280 is specifically located at the side of the C port of the valve seat 220, and it is understood that, in actual installation, the position-limiting component 280 may also be located at the side of the E port of the valve seat 220.

In the illustrated embodiment, the limiting member 280 and the pilot valve 270 are separately disposed on two sides of the valve housing 210, and it will be understood that in practice, the limiting member 280 may be disposed on the same side as the pilot valve 270 if space permits, or the limiting member 280 may be disposed at other positions on the circumference of the valve housing 210.

Example 5

Referring to fig. 9-1, 9-2 and 9-3, fig. 9-1, 9-2 and 9-3 are schematic structural diagrams of an electromagnetic switching valve in a fifth embodiment of the present invention under three operating modes, respectively.

In this embodiment, the solenoid operated switching valve is not provided with a pilot valve arrangement and includes a main valve and two control assemblies, referred to herein as a first control assembly 291 and a second control assembly 292. The main valve of the electromagnetic switching valve is similar to the structure of the previous embodiments, and will not be described in detail.

The first control assembly 291 and the second control assembly 292 are respectively arranged on two sides of the connecting rod assembly 240; the first control assembly 291 includes a first driving member and a first stop 2911, the first driving member being capable of driving the first stop 2911 to switch between the extended position and the retracted position; the second control assembly 292 includes a second driving member and a second limiting member 2921, the second driving member being capable of driving the second limiting member 2921 to switch between the extended position and the retracted position.

The two control assemblies are specifically configured to:

the first limiting member 2911 and the second limiting member 2921 are both located at protruding positions, and two ends of the connecting rod assembly 240 are respectively abutted against the two limiting members, so that the slider 230 is located at a second working position, i.e., a working position where the E interface, the S interface, and the C interface are mutually communicated;

the first limiting member 2911 is in the retracted position, the second limiting member 2921 is in the extended position, and the connecting rod assembly 240 can abut against the first limiting member 2911, so that the slider 230 is in the first working position, that is, the E interface is communicated with the S interface, and the C interface is communicated with the D interface;

the first limiting member 2911 is in the extended position, the second limiting member 2921 is in the retracted position, and the link assembly 240 can abut against the second limiting member 2921, so that the slider 230 is in the third working position, that is, the S interface is communicated with the C interface, and the E interface is communicated with the D interface.

In this embodiment, two control components are specifically installed on two end caps of the valve sleeve 210, specifically, two limiting members are respectively inserted and matched with the two end caps, it can be understood that the end caps fixedly connected to two ends of the valve sleeve 201 are similar to the second end cap 260 in the foregoing embodiments, and the middle portion of the end caps is provided with through holes for inserting and matching with the limiting members.

In this embodiment, the structural composition and arrangement of the first driving member and the second driving member are similar to those of the foregoing embodiments 1 and 2, and the structure similar to a direct-acting solenoid valve is adopted to control the extension and retraction of the corresponding limiting members, which is not described in detail.

As shown in fig. 9-1, the first driving element of the first control element 291 controls the first limiting element 2911 to be in the retracted position, and the second driving element of the second control element 292 controls the second limiting element 2921 to be in the extended position; the left end of the connecting rod assembly 240 is a low-pressure area, the right end of the connecting rod assembly 240 is a high-pressure area, the connecting rod assembly 240 slides to the left side until the piston 242 at the left end of the connecting rod assembly 240 abuts against the second end cover 260 located on the left side, at the moment, the sliding block 230 is located at the left end position, the interface E is communicated with the interface S through the inner cavity of the sliding block 230, the interface C is communicated with the interface D through the valve cavity, and the electromagnetic switching valve is located.

As shown in fig. 9-2, the first driving element of the first control assembly 291 controls the first limiting element 2911 to extend toward the valve seat 220, the second driving element of the second control assembly 292 controls the second limiting element 2921 to be at an extended position, when the first limiting element 2911 moves toward the valve seat 220, the connecting rod assembly 240 is pushed to move to the right, the piston 242 on the right side of the connecting rod assembly 240 abuts against the second limiting element 2921, at this time, the slider 230 is at the middle position, the E port, the S port, and the C port are mutually communicated through the inner cavity of the slider 230, the D port is not communicated with the E port, the S port, and the C port, and the electromagnetic switching valve is at the second working position.

As shown in fig. 9-3, the first driving element of the first control element 291 controls the first limiting element 2911 to be in the extended position, the second driving element of the second control element 292 controls the second limiting element 2921 to be in the retracted position, in this process, the connecting rod assembly 240 is not limited by the second limiting element 2921, and moves rightward under the action of the extended first limiting element 2911, a high pressure region is formed at the left end of the connecting rod assembly 240, a low pressure region is formed at the right end, and under the action of the pressure difference, the connecting rod assembly 240 continues to move rightward until it abuts against the second end cap 260 and/or the second limiting element 2921 located on the right side, at this time, the slider 230 is located at the right end, the S port and the C port are communicated through the inner cavity of the slider 230, the E port is communicated with the D port through.

In this embodiment, the driving members of the two control assemblies are configured similarly to those in embodiments 1 and 2, and it is understood that, in actual arrangement, the driving members of the two control assemblies may also be configured as in embodiments 3 and 4, or one may be configured as in embodiments 1 and 2, and the other may be configured as in embodiments 3 and 4.

In addition, it should be noted that, in actual implementation, the driving members in the above embodiments may also adopt other structures, as long as the driving members can drive the corresponding limiting members to switch between the first operating state and the second operating state to limit the position of the slider 230, for example, each driving member may adopt a linear motor.

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.

Claims

1. The electromagnetic switching valve comprises a valve sleeve, a valve seat, a sliding block and a connecting rod assembly; the electromagnetic switching valve comprises a valve cavity, the valve seat, the sliding block and the connecting rod assembly are arranged in the valve cavity, and the valve cavity is provided with a D interface communicated with the valve cavity;

characterized in that the slide is switchable between three operating positions and is configured to:

2. The electromagnetic switching valve of claim 1, further comprising a pilot valve and a stop member; the limiting component is positioned on one side of the valve seat;

the pilot valve is used for controlling the pressure difference at two ends of the connecting rod assembly so as to switch the sliding direction of the connecting rod assembly;

the limiting component comprises a limiting part and a driving part, the driving part can drive the limiting part to switch between two working states so as to limit the sliding position of the connecting rod assembly when the connecting rod assembly slides towards the side of the limiting component, and the driving part is configured to:

the limiting piece is in a first working state and can be abutted against the connecting rod assembly, so that the sliding block is in the second working position;

the limiting part is in a second working state, and the connecting rod assembly can slide to a position where the sliding block is in the first working position or the third working position.

3. The electromagnetic switching valve according to claim 2, wherein end caps are fixedly connected to both ends of the valve housing, the position-limiting member is inserted into one of the end caps, and the driving member can drive the position-limiting member to extend and retract along the axial direction of the valve housing so as to switch between the first operating state and the second operating state.

4. The electromagnetic switching valve according to claim 2, wherein the retainer is engaged with the valve housing, and the driving member is capable of driving the retainer to extend and retract along an axial direction perpendicular to the valve housing to switch between the first operating state and the second operating state.

5. The electromagnetic switching valve according to claim 1, further comprising two control assemblies respectively disposed on both sides of the connecting rod assembly;

the control assembly comprises a driving piece and a limiting piece, and the driving piece can drive the limiting piece to switch between an extending position and a retracting position;

and is configured to:

the two limiting pieces are both located at extending positions, and two ends of the connecting rod assembly are respectively abutted against the two limiting pieces so that the sliding block is located at the second working position;

the first limiting piece of the two limiting pieces is in a retracted position, the second limiting piece of the two limiting pieces is in an extended position, and the connecting rod assembly can be abutted against the first limiting piece so that the sliding block is in the first working position;

in the two limiting parts, the first limiting part is located at an extending position, the second limiting part is located at a retracting position, and the connecting rod assembly can be abutted against the second limiting part, so that the sliding block is located at the third working position.

6. The electromagnetic switching valve according to claim 5, wherein end caps are fixedly connected to both ends of the valve housing, and the two control assemblies are respectively mounted on the two end caps, wherein the two position-limiting members are respectively inserted into and engaged with the two end caps; the driving member can drive the limiting member to move along the axial direction of the valve sleeve so as to switch between the extending position and the retracting position.

7. The electromagnetic switching valve according to any one of claims 3 to 6, wherein the driving member includes an electromagnetic coil, a stationary core, and a return elastic member disposed between the stationary core and the limiting member, and the limiting member is capable of moving telescopically under the action of electromagnetic force and the return elastic member.

8. The electromagnetic switching valve according to any one of claims 3 to 6, wherein the driving member includes a coil, a rotor member, a screw fixed to the rotor member, and a nut screwed to the screw, and the screw is connected to the stopper; the coil is used for driving the rotor part to rotate, and the screw rod can drive the limiting part to move in a telescopic mode along the axial direction of the screw rod.

9. The electromagnetic switching valve of claim 8, wherein the driving member further comprises a valve body, the nut is fixedly connected to the valve body, and the valve body has a guide hole for the limiting member to pass through.

10. The electromagnetic switching valve of any of claims 3-6, wherein the drive comprises a linear motor.

11. 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 10;

and the second branch is also provided with a flow regulating valve.