A variable displacement compressor solenoid valve based on dynamic pressure control

Abstract

The present invention discloses a variable displacement compressor solenoid valve based on pressure dynamic regulation, which belongs to the technical field of compressor control solenoid valves. It includes a valve body, a valve stem, a bellows assembly, and an electromagnetic drive module. A valve stem sleeve and a valve stem that can partition the inner cavity into a first cavity, a second cavity, and a third cavity are movably embedded in the valve body. The valve stem sleeve is movably sleeved on the outer periphery of the valve stem. A first spring is arranged between the top of the valve stem and the valve body, and a second spring is arranged between the top of the valve stem and the valve stem sleeve. An exhaust port, a slanted plate port, and an air intake port are arranged on the valve body. A beveled notch and an air guide passage are arranged on the valve stem. The valve stem sleeve can move to abut against the side wall of the beveled notch. The valve stem sleeve can move to abut against the inner convex surface arranged on the inner wall of the second cavity. The variable displacement compressor solenoid valve based on pressure dynamic regulation of the present invention can enable the compressor to achieve the best operating state under different working conditions.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressor control solenoid valves, and in particular relates to a variable displacement compressor solenoid valve based on dynamic pressure regulation. Background Art

[0002] The main function of the variable displacement compressor solenoid valve is to automatically adjust the compressor displacement according to the system's working pressure, thereby meeting different refrigeration needs and improving energy efficiency. The control solenoid valve automatically opens or closes by obtaining pressure change information from the automotive air conditioning system, and intelligently adjusts the compressor displacement, reducing it at low loads and increasing it at high loads, thereby achieving energy-saving effects.

[0003] However, the existing variable displacement compressor solenoid valve has many shortcomings. On the one hand, the pressure regulation accuracy is not enough, and it is difficult to achieve accurate control of the system pressure, resulting in the compressor being unable to achieve the optimal operating state under different working conditions. On the other hand, the internal structure of the existing variable displacement compressor solenoid valve is relatively complex, the processing technology is relatively cumbersome and difficult to assemble. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a variable displacement compressor solenoid valve based on pressure dynamic regulation, which has a simple structure and can enable the compressor to achieve an optimal operating state under different working conditions.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a variable displacement compressor solenoid valve based on dynamic pressure regulation, comprising a valve body, and an electromagnetic drive module capable of driving a valve stem member to abut against a bellows assembly, wherein a valve stem sleeve and a valve stem member capable of partitioning the inner cavity thereof into a first volume cavity, a second volume cavity, and a third volume cavity are movably embedded in the valve body, the valve stem sleeve is movably sleeved on the outer periphery of the valve stem member, a first spring is arranged between the top of the valve stem member and the valve body, and a second spring is arranged between the top of the valve stem member and the valve stem sleeve;

[0006] The valve body is provided with an exhaust port and a slanted plate port connected to the second cavity and an air intake port connected to the third cavity, and the valve stem is provided with a bevel notch and an air guide passage that can be connected to the bevel notch and the third cavity;

[0007] The inner edge of the bottom end of the valve stem sleeve can move to abut against the side wall of the beveled notch; the outer edge of the bottom end of the valve stem sleeve can move to abut against the inner convex surface arranged on the inner wall of the second cavity.

[0008] Optionally, the electromagnetic drive module includes a fixed iron core connected to the top of the valve body, a guide sleeve covered on the top of the fixed iron core, a shell covered on the outside of the guide sleeve and the fixed iron core, and an electromagnetic coil assembly;

[0009] Among them, a moving iron core is slidably embedded in the guide sleeve, and a push rod capable of passing through the fixed iron core is arranged on the moving iron core. The push rod can abut against the top of the valve stem member, and a first sealing ring is arranged between the guide sleeve and the fixed iron core. The sealed cavity formed between the guide sleeve and the fixed iron core can be sealed and connected with the first cavity.

[0010] Optionally, the bellows assembly is placed in the third cavity, and the bellows assembly can abut against the bottom of the valve stem.

[0011] Optionally, the air guide passage can pass through the valve stem and connect the first cavity with the third cavity.

[0012] Optionally, a second sealing ring is provided between the valve stem sleeve and the valve body, and between the valve stem member and the valve body.

[0013] Optionally, a plurality of third sealing rings are provided on the outer periphery of the fixed iron core and the valve body.

[0014] Optionally, the valve stem member includes a valve stem and a valve cover fixedly connected to the top of the valve stem, and the air guide passage includes a through inner hole arranged on the valve stem and a through hole arranged on the valve cover, and the through inner hole is communicated with the through hole.

[0015] Optionally, a filter screen is provided at the exhaust port and the inclined plate port located outside the valve body.

[0016] Optionally, the outer edge of the bottom end of the valve stem sleeve that can abut against the surface of the inner convex portion is an arc surface, and the side of the inner convex portion that abuts against the valve stem sleeve is an inclined surface.

[0017] Optionally, the inner edge of the bottom end of the valve stem sleeve and the side corresponding to the beveled notch abutting against each other are both beveled surfaces.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the valve stem sleeve and the valve stem member divide the inner cavity of the valve body into three cavities, simplifying the internal structure of the valve body. Under the action of the second spring and the electromagnetic drive module, the outer edge of the bottom end of the valve stem sleeve can move toward the surface of the inner convex portion, thereby controlling the opening and disconnection of the valve port between the exhaust port and the inclined plate port. After the valve stem sleeve is blocked by the inner convex portion, the electromagnetic drive module can drive the valve stem member to move relative to the valve stem sleeve, thereby controlling the opening of the valve port between the inclined plate port and the intake port. The valve stem member and the valve stem sleeve can accurately control the opening and disconnection between each valve port under the mutual cooperation of various components, realize the precise control of the pressure of each cavity inside the compressor, meet the pressure requirements under different working conditions, and save energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic cross-sectional view of the solenoid valve of a variable displacement compressor when the solenoid coil component is not energized in a preferred embodiment of the present invention;

[0021] Figure 2 In the preferred embodiment of the present invention Figure 1 A schematic diagram of the local enlarged structure at B;

[0022] Figure 3 It is a schematic cross-sectional view of the solenoid valve of a variable displacement compressor when the solenoid coil component is energized and the main valve port is completely blocked in a preferred embodiment of the present invention;

[0023] Figure 4 In the preferred embodiment of the present invention Figure 3 A schematic diagram of the local enlarged structure at C;

[0024] Among them, 1. valve body; 101. first cavity; 102. second cavity; 1021. inner convex part; 103. third cavity; 104. exhaust port; 105. inclined plate port; 106. air intake port; 2. bellows assembly; 3. valve stem sleeve; 4. valve stem member; 401. valve stem; 4011. beveled edge notch; 4012. through inner hole; 402. valve cover; 4021. through hole; 5. first spring; 6. second spring; 7. fixed iron core; 8. guide sleeve; 9. housing; 10. electromagnetic coil assembly; 11. moving iron core; 12. push rod; 13. first sealing ring; 14. second sealing ring; 15. third sealing ring. DETAILED DESCRIPTION

[0025] The present invention will now be further described in detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0026] It should be noted that if there are directional indications (such as up, down, bottom, top, etc.) involved in this embodiment, the directional indication is only used to explain the relative position relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Unless otherwise clearly specified and defined, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0027] like Figure 1-Figure 4 As shown, a variable displacement compressor solenoid valve based on dynamic pressure regulation includes a valve body 1 and an electromagnetic drive module capable of driving a valve stem 4 to abut against a bellows assembly 2. The bellows assembly 2 and the electromagnetic drive module are both prior arts, and the electromagnetic drive module not only has the function of driving the valve stem 4 to move, but also can receive and process various electrical signals.

[0028] At the same time, the bellows assembly 2 is installed at the bottom of the valve body 1 and can be supported at the bottom of the valve stem 4. The electromagnetic drive module is installed at the top of the valve body 1, and its output end can abut against the top of the valve stem 4, and can drive the valve stem 4 to compress the bellows assembly 2. At the same time, since a second sealing ring 14 is provided between the valve stem sleeve 3 and the valve body 1, and between the valve stem 4 and the valve body 1, the valve stem sleeve 3 and the valve stem 4 movably embedded in the valve body 1 can separate its (valve body 1) inner cavity into a first cavity 101, a second cavity 102, and a third cavity 103. Further, the valve stem sleeve 3 is movably sleeved on the outer periphery of the valve stem 4, a first spring 5 is provided between the top of the valve stem 4 and the valve body 1, and a second spring 6 is provided between the top of the valve stem 4 and the valve stem sleeve 3. The first spring 5 can be elastically supported between the top of the valve stem 4 and the valve body 1, and the second spring 6 can be elastically supported between the valve stem 4 and the valve stem sleeve 3. The valve body 1 is provided with an exhaust port 104 connected to the second cavity 102, a slanted plate port 105 and an air intake port 106 connected to the third cavity 103, and the valve stem 4 is provided with a beveled notch 4011 and an air guide passage that can be connected to the beveled notch 4011 and the third cavity 103. At the same time, under the support of the second spring 6, the inner edge of the bottom end of the valve stem sleeve 3 can move to abut against the side wall of the beveled notch 4011, so as to cut off the auxiliary valve port between the air guide passage and the second cavity 102. When the electromagnetic drive module drives the valve stem 4 to compress the bellows assembly 2, the outer edge of the bottom end of the valve stem sleeve 3 can move to abut against the surface of the inner convex portion 1021 set on the inner wall of the second cavity 102, thereby cutting off the main valve port between the exhaust port 104 and the slanted plate port 105.

[0029] It should be noted that the exhaust port 104 in the technical solution can be connected to the exhaust chamber of the compressor, the swash plate port 105 can be connected to the swing chamber of the compressor, and the air intake port 106 can be connected to the suction cup chamber of the compressor. At the same time, the pressures (Pd, Pc, Ps) at various locations when the compressor is working can be detected in real time and can be fed back to the electromagnetic drive module. This pressure detection method is a prior art. Among them, Pd refers to the pressure when the compressor discharges the gas after compressing it, that is, the pressure at the exhaust port 104; Pc refers to the crankcase pressure, that is, the pressure at the swash plate port 105; Ps refers to the pressure when the compressor inhales gas from the air intake port 106 during the air intake process. The electromagnetic drive module can drive the valve stem 4 to move according to the pressure changes of Pd, Pc, and Ps.

[0030] Specifically, the variable displacement compressor solenoid valve in the technical solution can be installed in an automobile air conditioning compressor system, which is a prior art, and when the electromagnetic coil assembly 10 in the electromagnetic drive module is not energized, under the support of the first spring 5, such as Figure 1As shown, the valve cover 402 in the valve stem 4 can abut against the lower end surface of the fixed iron core 7, and the valve cover 402 and the valve stem 401 fixedly connected to the valve cover 402 can also move up to the highest position. At this time, the valve cover 402 can also push the push rod 12 and the moving iron core 11 to the highest position, and under the action of the second spring 6, the inner edge of the bottom end of the valve stem sleeve 3 can be pushed to abut against the side wall of the bevel notch 4011, thereby cutting off the auxiliary valve port. It should be noted that in this process, the upward displacement stroke of the valve cover 402 is greater than the downward displacement stroke of the valve stem sleeve 3, so that the main valve port is in the maximum opening state at this time (such as Figure 2 At this time, the gaseous (gas-liquid mixed) refrigerant in the exhaust chamber can enter the swing chamber of the compressor through the exhaust port 104, the main valve port and the swash plate port 105 to the maximum extent, so that Pc increases, and the compressor can also be in the minimum displacement state.

[0031] When the electromagnetic coil assembly 10 in the electromagnetic drive module is energized, the electromagnetic force generated by the electromagnetic coil assembly 10 can drive the moving iron core 11 and the push rod 12 to move toward the valve cover 402, so that the valve cover 402 compresses the first spring 5 and the second spring 6 downward, and the valve stem 401 compresses the bellows assembly 2 downward. After the bellows assembly 2 is compressed, a rebound force acting on the valve stem 401 is formed, and the direction of the rebound force is opposite to the direction of the electromagnetic force acting on the valve stem 401 through the moving iron core 11, the push rod 12, and the valve cover 402. In the process of indirectly driving the valve stem 401 to move by electromagnetic force, the force of the push rod 12 on the valve stem 401 can continue to act on the valve stem 401 after offsetting the rebound force of the bellows assembly 2, so that the valve stem 401 continues to move downward. At the same time, the second spring 6 acting between the valve cover 402 and the valve stem sleeve 3 can push the valve stem sleeve 3 to move downward, so that the opening of the main valve port is reduced. Among them, the displacement of the valve stem 401 determines the opening of the main valve port, so it can control the flow rate of the gaseous (gas-liquid mixed) refrigerant flowing through the main valve port, reduce Pc, and increase the displacement of the compressor. And when the current of the electromagnetic coil assembly 10 continues to increase, the opening of the main valve port will continue to decrease until it is completely closed, thereby cutting off the flow path of the gaseous (gas-liquid mixed) refrigerant between the exhaust port 104 and the inclined plate port 105, and achieving the effect of cutting off the pressure transmission between Pd and Pc. When the current continues to increase, since the main valve port has been closed, the second spring 6 can no longer push the valve stem sleeve 3 to continue to move downward. At this time, there will be a relative displacement between the valve stem 401 and the valve stem sleeve 3, that is, the valve stem sleeve 3 remains relatively still, and the valve stem 401 will continue to move downward to open the auxiliary valve port (such as Figure 3 , Figure 4When the auxiliary valve port is opened, the third volume chamber 103 and the second volume chamber 102 can be connected through the air guide passage and the bevel notch 4011, that is, Pc and Ps are interconnected, so that Pc decreases rapidly until Pc and Ps are equal (or close), and the compressor can be in the maximum displacement working state at this time.

[0032] It should be noted that the bellows assembly 2 placed in the third chamber 103 has a vacuum chamber inside. When the pressure (Ps) at the air inlet 106 changes, the bellows assembly 2 will also be compressed and deformed due to the change in Ps, and the valve stem 401 will also move accordingly, thereby autonomously adjusting the opening of the main valve port and putting the compressor in a variable displacement working state. It should be noted that the valve stem 4 includes a valve stem 401 and a valve cover 402 fixedly connected to the top of the valve stem 401. The valve stem 4 adopts a split design, which can reduce the difficulty of processing. At the same time, the air guide passage includes a through inner hole 4012 arranged on the valve stem 401 and a through hole 4021 arranged on the valve cover 402. The through inner hole 4012 is communicated with the through hole 4021, that is, the air guide passage can pass through the valve stem member 4 and can connect the first cavity 101 and the third cavity 103. Therefore, the pressure of the gaseous (gas-liquid mixed) refrigerant in the first cavity 101 and the second cavity 102 acting on the two ends of the valve stem 401 can offset each other, so that the displacement of the valve stem 401 is not affected by the pressure of the gaseous (gas-liquid mixed) refrigerant itself.

[0033] Further, if Figure 1 , Figure 3 As shown, the push rod 12, the moving iron core 11, the valve cover 402, the valve stem 401, the valve stem sleeve 3, the first cavity 101, the second cavity 102, the third cavity 103, and the bellows assembly 2 are coaxially arranged, and the valve stem 401 and the valve stem sleeve 3 have equal diameters at three locations indicated by the label D. Therefore, the displacement of the valve stem 401 and the valve stem sleeve 3 will not be affected by Pd and Pc, and the valve stem 401 is only affected by the electromagnetic force and the first spring 5, the second spring 6 and the bellows assembly 2.

[0034] Therefore, the variable displacement compressor solenoid valve in this embodiment can automatically open or close according to the size of Pc to adjust the displacement of the compressor, so that it reduces the displacement at low load and increases the displacement at high load, thereby achieving energy saving. Embodiment 2

[0035] like Figure 1 , Figure 3As shown, on the basis of the first embodiment, the electromagnetic drive module includes a fixed iron core 7 connected to the top of the valve body 1, a guide sleeve 8 covered on the top of the fixed iron core 7, a housing 9 covered on the outside of the guide sleeve 8 and the fixed iron core 7, and an electromagnetic coil assembly 10. A moving iron core 11 is slidably embedded in the guide sleeve 8, and a push rod 12 capable of penetrating the fixed iron core 7 is provided on the moving iron core 11. The push rod 12 can abut against the top of the valve stem 4, and a first sealing ring 13 is provided between the guide sleeve 8 and the fixed iron core 7, and the sealed cavity formed between the guide sleeve 8 and the fixed iron core 7 can be sealed and communicated with the first volume 101 to prevent the gaseous (gas-liquid mixed) refrigerant from escaping.

[0036] Further, such as Figure 1 As shown, the outer periphery of the fixed iron core 7 and the valve body 1 are both provided with a plurality of third sealing rings 15, so as to block the communication path between the exhaust port 104, the swash plate port 105, the air intake port 106 and the valve body 1 when the variable displacement compressor solenoid valve is installed on the automobile air conditioning system. It should be noted that in the present technical solution, the second sealing ring 14 and the third sealing ring 15 are O-rings.

[0037] As mentioned above, the exhaust port 104 and the inclined plate port 105 are provided with filters at the ports outside the valve body 1 to prevent impurities in the automobile air-conditioning system from entering the interior of the variable displacement compressor solenoid valve and blocking the main valve port and the auxiliary valve port.

[0038] Further, such as Figure 2 , Figure 4 As shown, the outer edge of the bottom end of the valve stem sleeve 3 that can abut against the surface of the inner convex portion 1021 is an arc surface, and the side of the inner convex portion 1021 that abuts against the valve stem sleeve 3 is a slope, and the inner edge of the bottom end of the valve stem sleeve 3 and the corresponding side of the sloped groove 4011 that abut against each other are both slopes. Embodiment 3

[0039] like Figure 1-Figure 4 As shown, based on the first and second embodiments, a control method for a variable displacement compressor solenoid valve is implemented by using the aforementioned variable displacement compressor solenoid valve based on pressure dynamic control, and includes the following steps:

[0040] Step 1: When the automobile air-conditioning compressor system is running, the real-time data of Pd, Pc, and Ps when the compressor is working is collected through the automobile air-conditioning compressor system, and fed back to the electromagnetic drive module;

[0041] Step 2: Determine whether 0.15MPa≤Ps≤0.35MPa is satisfied through the data fed back by the automobile air-conditioning compressor system. If satisfied, return to step 1; if not satisfied, proceed to step 3.

[0042] Step three, if Ps is less than 0.15MPa, the automobile air-conditioning compressor system is in a low-load state. At this time, the electromagnetic drive module can disconnect the enablement of the electromagnetic coil assembly 10, so that the first spring 5 pushes the valve cover 402 in the valve stem 4 to abut against the lower end surface of the fixed iron core 7, so that the valve stem 401 fixedly connected to the valve cover 402 can also move up to the highest position, and the second spring 6 can make the inner edge of the bottom end of the valve stem sleeve 3 abut against the side wall of the bevel groove 4011, so that the valve stem sleeve 3 can move up together with the valve stem 401, thereby increasing the opening of the main valve port, so that Pd enters Pc, thereby increasing Pc, and making the inclination angle of the swash plate inside the compressor smaller, so as to reduce the compressor displacement; if Ps is greater than 0.35MPa, the electromagnetic drive module can energize the electromagnetic coil assembly 10, and the electromagnetic The electromagnetic force generated by the energization of the coil assembly 10 can drive the moving iron core 11 and the push rod 12 to press down the valve cover 402 to compress the first spring 5 and the second spring 6, and drive the valve stem 401 to move downward. At the same time, the second spring 6 acting between the valve cover 402 and the valve stem sleeve 3 can push the valve stem sleeve 3 to move downward, so that the opening of the main valve port is reduced, so that Pc is reduced, and the displacement of the compressor is increased. During this period, the bellows assembly 2 will also be compressed and deformed due to the change of Ps, and the valve stem 401 will also move accordingly, so as to autonomously adjust the opening of the main valve port, so that the compressor is in a variable displacement working state; and when the current of the electromagnetic coil assembly 10 is continuously increased, the opening of the main valve port will continue to decrease until it is completely closed. If the current continues to increase, the valve stem 401 will continue to move downward, so that the auxiliary valve port is opened. The opening of the auxiliary valve port can allow Pc to enter Ps through the air guide passage, so that Pc is rapidly reduced until Pc is equal to (or close to) Ps, and the compressor can be in a maximum displacement working state at this time.

[0043] Working principle: A main valve port is provided between the valve body 1 and the valve stem sleeve 3. The opening of the main valve port corresponds to the refrigerant flow from the exhaust port 104 to the inclined plate port 105. The opening of the main valve port can be adjusted or closed by the displacement of the valve stem sleeve 3. The bellows assembly 2 placed in the third chamber 103 has a vacuum chamber inside. When the pressure (Ps) at the suction port 106 changes, the bellows assembly 2 will also be compressed and deformed due to the change of Ps, and the valve stem 401 will also move accordingly, thereby autonomously adjusting the opening of the main valve port and putting the compressor in a variable displacement working state. A secondary valve port is provided between the valve stem sleeve 3 and the valve stem 401. The secondary valve port can connect the suction port 106 and the inclined plate port 105, thereby controlling the flow of refrigerant between the suction port 106 and the inclined plate port 105. That is, the displacement of the valve stem 401 and the valve stem sleeve 3 can be used to change the refrigerant displacement of the compressor, so that the displacement is reduced at low load and increased at high load, thereby achieving energy saving effect.

[0044] The above is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A variable displacement compressor solenoid valve based on dynamic pressure control, comprising a valve body (1), and an electromagnetic drive module capable of driving a valve stem (4) to abut against a bellows assembly (2), characterized in that: A valve stem sleeve (3) and a valve stem member (4) are movably embedded in the valve body (1) and are capable of dividing the inner cavity of the valve body into a first cavity (101), a second cavity (102), and a third cavity (103); the valve stem sleeve (3) is movably sleeved on the outer periphery of the valve stem member (4); a first spring (5) is arranged between the top of the valve stem member (4) and the valve body (1); and a second spring (6) is arranged between the top of the valve stem member (4) and the valve stem sleeve (3); The valve body (1) is provided with an exhaust port (104) connected to the second cavity (102), a slanted plate port (105), and an air intake port (106) connected to the third cavity (103); the valve stem (4) is provided with a beveled notch (4011) and an air guide passage capable of connecting the beveled notch (4011) and the third cavity (103); The inner edge of the bottom end of the valve stem sleeve (3) can move to abut against the side wall of the beveled notch (4011); the outer edge of the bottom end of the valve stem sleeve (3) can move to abut against the surface of the inner convex portion (1021) provided on the inner wall of the second cavity (102).

2. The variable displacement compressor solenoid valve based on pressure dynamic regulation according to claim 1 is characterized in that: The electromagnetic drive module comprises a fixed iron core (7) connected to the top of the valve body (1), a guide sleeve (8) arranged on the top of the fixed iron core (7), a shell (9) arranged outside the guide sleeve (8) and the fixed iron core (7), and an electromagnetic coil assembly (10); A moving iron core (11) is slidably embedded in the guide sleeve (8), and a push rod (12) capable of penetrating the fixed iron core (7) is provided on the moving iron core (11); the push rod (12) can abut against the top of the valve stem (4), and a first sealing ring (13) is provided between the guide sleeve (8) and the fixed iron core (7); a sealed cavity formed between the guide sleeve (8) and the fixed iron core (7) can be sealed and connected to the first cavity (101).

3. The variable displacement compressor solenoid valve based on pressure dynamic regulation according to claim 1 is characterized in that: The bellows assembly (2) is placed in the third chamber (103), and the bellows assembly (2) is capable of abutting against the bottom of the valve stem (4).

4. The variable displacement compressor solenoid valve based on pressure dynamic regulation according to claim 1 is characterized in that: The air guide passage can pass through the valve stem (4) and can connect the first cavity (101) and the third cavity (103).

5. The variable displacement compressor solenoid valve based on pressure dynamic regulation according to claim 1 is characterized in that: A second sealing ring (14) is provided between the valve stem sleeve (3) and the valve body (1), and between the valve stem member (4) and the valve body (1).

6. The variable displacement compressor solenoid valve based on pressure dynamic regulation according to claim 2 is characterized in that: A plurality of third sealing rings (15) are provided on the outer peripheries of the fixed iron core (7) and the valve body (1).

7. The variable displacement compressor solenoid valve based on pressure dynamic regulation according to claim 1 is characterized in that: The valve stem member (4) comprises a valve stem (401) and a valve cover (402) fixedly connected to the top of the valve stem (401); the air guide passage comprises a through inner hole (4012) provided on the valve stem (401) and a through hole (4021) provided on the valve cover (402); the through inner hole (4012) is in communication with the through hole (4021).

8. The variable displacement compressor solenoid valve based on pressure dynamic regulation according to claim 1, characterized in that: The exhaust port (104) and the inclined plate port (105) are provided with filter screens at the ports located outside the valve body (1).

9. The variable displacement compressor solenoid valve based on pressure dynamic regulation according to claim 1, characterized in that: The outer edge of the bottom end of the valve stem sleeve (3) that can abut against the surface of the inner convex portion (1021) is a curved surface, and the side of the inner convex portion (1021) that abuts against the valve stem sleeve (3) is an inclined surface.

10. The variable displacement compressor solenoid valve based on pressure dynamic regulation according to claim 1, characterized in that: The inner edge of the bottom end of the valve stem sleeve (3) and the side of the beveled notch (4011) that abuts against each other are both beveled surfaces.

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