Electromagnetic proportional valve suitable for complex temperature environment

Abstract

The utility model relates to the technical field of electromagnetic valves, and provides an electromagnetic proportional valve suitable for a complex temperature environment, which comprises a valve seat, a valve core, a sealing element and a reset elastic component. According to the electromagnetic proportional valve, the reset elastic component used for enabling the sealing piece to recover the sealing capacity is additionally arranged on the valve element, and when the high elasticity property of the sealing piece is affected by low temperature, the sealing piece subjected to extrusion deformation can be attached to and sealed with the valve port again through the reset elastic component; therefore, the electromagnetic proportional valve still has good sealing performance when being applied to a complex temperature environment as far as possible. Meanwhile, in the opening process of the valve port of the electromagnetic proportional valve, due to the fact that the reset elastic component can accelerate the speed that the extruded and deformed part of the sealing piece recovers to the non-deformed state, the output flow of the electromagnetic proportional valve can meet the preset requirement within a shorter time range, and the service life of the electromagnetic proportional valve is prolonged. Therefore, the response time of the electromagnetic proportional valve is shortened.

Description

Technical Field

[0001] The present application relates to the technical field of solenoid valves, and in particular to an electromagnetic proportional valve suitable for complex temperature environments. Background Art

[0002] The contents of this section merely provide background information related to the present application and may not constitute prior art.

[0003] In order to improve the sealing performance and applicable working conditions of the electromagnetic proportional valve, the valve core (generally referring to the moving iron core) of the known electromagnetic proportional valve and the valve port in the valve seat are usually sealed by a soft or hard seal. The so-called soft or hard seal, in simple terms, means that the end of the valve core is provided with a seal made of a highly elastic material, and the sealing surface of the valve port is made of metal or hard plastic. When sealing, the seal with a highly elastic part will adhere to and squeeze the sealing surface of the valve port. In this process, the seal will be squeezed and deformed to a certain extent, and the specific surface is that the seal will be concave inward (that is, concave in the direction away from the sealing surface of the valve port) to rely on the seal to reliably seal the valve port.

[0004] For the electromagnetic proportional valve using the above-mentioned sealing form, its sealing performance in a normal temperature environment is good. However, in a complex temperature environment, such as a low temperature environment, the high elasticity of the seal may be affected by the low temperature, so that the seal cannot fully restore its sealing ability after being squeezed and deformed. At this time, the sealing form between the seal and the sealing surface of the valve port will change from soft seal to hard seal, and the seal may not be able to completely seal the valve port, which may cause a small amount of leakage. In addition, since the valve core of the electromagnetic proportional valve is usually reserved with a gap between the valve core and the valve seat for normal opening and closing of the valve core, the valve core may shift during multiple movements. On this basis, if the seal is squeezed and deformed inward after completing the previous seal, and the high elasticity of the seal is affected by the low temperature, when the seal seals the valve port again, the inner groove formed by the inward depression of the seal will not be able to better fit the sealing surface of the valve port, and a large amount of leakage may occur.

[0005] At the same time, the known electromagnetic proportional valve is a valve that realizes the movement of the valve core by passing a certain amount of current, and then relies on the valve core to open and close the valve port, and there is a certain response time between the valve port closing and opening or opening and closing. On this basis, under the influence of low temperature, when a certain amount of current is passed through the electromagnetic proportional valve to make the valve core open the valve port, the seal will slowly recover to the undeformed state. At this time, the output flow of the valve port will continue to fluctuate, so that it is difficult to quickly reach the required output flow, thereby affecting the response time of the electromagnetic proportional valve. Utility Model Content

[0006] In view of this, the purpose of the present application is to provide an electromagnetic proportional valve that can restore the sealing ability of a seal that has undergone extrusion deformation and has high elastic properties and is difficult to seal the valve port due to the influence of a complex temperature environment, so as to achieve reliable sealing between the seal and the valve port. This ensures that the electromagnetic proportional valve still has good sealing performance when used in a complex temperature environment and helps to optimize the response time of the electromagnetic proportional valve.

[0007] The purpose of this application is achieved through the following technical solutions:

[0008] An electromagnetic proportional valve suitable for complex temperature environments, comprising:

[0009] A valve seat, defining a valve cavity inside, and a valve port located inside the valve cavity;

[0010] A valve core having a first end located inside the valve cavity;

[0011] A sealing member with elastic deformation capability, disposed at the first end of the valve core and aligned with the sealing surface of the valve port;

[0012] A reset elastic component is arranged inside the valve core and is used to elastically maintain the seal at the first end of the valve core; the reset elastic component is also configured to provide a force to the seal to restore the sealing ability of the seal when the seal undergoes an inwardly concave extrusion deformation.

[0013] In some possible embodiments, the first end of the valve core is provided with a downwardly open accommodating cavity, the sealing member seals the opening of the accommodating cavity, and the reset elastic component is disposed in the accommodating cavity.

[0014] In some possible embodiments, the resetting elastic component includes:

[0015] A reset portion, disposed in the accommodating cavity and abutting against the sealing member;

[0016] The resetting elastic member is arranged in the accommodating cavity, and two ends thereof are respectively connected to the resetting portion and the valve core.

[0017] In some possible embodiments, the reset portion is spherical, and an arc-shaped groove matched with the reset portion is provided on a side of the sealing member facing the reset portion.

[0018] In some possible embodiments, an actuating mechanism is further included, wherein the actuating mechanism is configured to drive the first end of the valve core to approach or move away from the valve port, so as to seal the valve port through the sealing member or release the seal of the valve port.

[0019] In some possible embodiments, the valve seat defines an installation cavity in communication with the valve cavity, and the second end of the valve core passes through the installation cavity;

[0020] The actuating mechanism comprises:

[0021] A magnetic assembly, disposed outside the valve seat and configured to apply an electromagnetic force to the valve core to force the first end of the valve core to move away from the valve port;

[0022] An actuating elastic member is sleeved on the outer wall of the valve core and is located in the installation cavity; the actuating elastic member is configured to provide a force to the valve core to force the first end of the valve core to approach the valve port when the first end of the valve core is away from the valve port.

[0023] In some possible embodiments, the actuating elastic member is provided with a mounting hole for the valve core to pass through, and the inner wall of the mounting hole is provided with a plurality of arc-shaped contact portions and hollow portions arranged in sequence along the circumference of the valve core, the arc-shaped contact portions are in contact with and connected to the outer wall of the valve core, and a gap is formed between the hollow portions and the outer wall of the valve core.

[0024] In some possible embodiments, the magnetic component includes:

[0025] A housing is provided on one side of the valve seat; the second end of the valve core extends into the interior of the housing;

[0026] A static iron core is arranged inside the housing and is arranged opposite to the valve core;

[0027] The coil is wound inside the shell through a coil frame, and the coil is arranged around the valve core and the static iron core.

[0028] In some possible embodiments, the magnetic assembly further includes a magnetic conductive ring; the magnetic conductive ring is disposed inside the shell and sleeved on the outside of the valve core.

[0029] In some possible embodiments, the valve seat further defines an inlet flow channel and an outlet flow channel communicating with the valve cavity, and the valve port is provided at a connection point between the valve cavity and the inlet flow channel or the outlet flow channel;

[0030] Filters are arranged inside the inlet channel and the outlet channel.

[0031] The technical solution of the embodiment of the present application has at least the following advantages and beneficial effects:

[0032] The electromagnetic proportional valve provided by the present application adds a reset elastic component on the valve core to restore the sealing ability of the seal. When the high elasticity of the seal is affected by low temperature, the reset elastic component can make the seal that has been squeezed and deformed fit and seal with the valve port again, so that the electromagnetic proportional valve can still have good sealing performance when used in a complex temperature environment as much as possible. At the same time, during the opening process of the valve port of the electromagnetic proportional valve, since the reset elastic component can speed up the speed at which the squeezed and deformed part of the seal is restored to the undeformed state, it is beneficial to enable the output flow of the electromagnetic proportional valve to reach the predetermined requirement within a shorter time range, thereby reducing the response time of the electromagnetic proportional valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the structure of an electromagnetic proportional valve suitable for a complex temperature environment provided in some embodiments of the present application;

[0034] Figure 2 for Figure 1 A cross-sectional view of a solenoid proportional valve is shown;

[0035] Figure 3 for Figure 2 A magnified view of the local structure at point A in the middle;

[0036] Figure 4 An exploded view of a valve core, a seal, and a resetting elastic component provided in some embodiments of the present application;

[0037] Figure 5 A schematic diagram of the structure of an actuating elastic member provided in some embodiments of the present application;

[0038] Figure 6 A top view of an assembled actuating elastic member and a valve core provided in some embodiments of the present application.

[0039] Icons: 10-valve seat, 11-valve cavity, 12-valve port, 13-inlet channel, 14-outlet channel, 15-filter element, 16-installation cavity, 17-sealing ring, 20-valve core, 21-accommodating cavity, 30-sealing element, 31-sealing diaphragm, 32-diaphragm pressure cover, 40-reset elastic component, 41-reset part, 42-reset elastic element, 50-actuating mechanism, 51-magnetic assembly, 511-housing, 512-static iron core, 513-coil, 514-coil frame, 515-magnetic ring, 52-actuating elastic element, 521-installation hole, 522-arc-shaped contact part, 523-hollow part. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with specific implementation methods. The same figure marks in the accompanying drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] Compared to the embodiments shown in the drawings, feasible implementations within the scope of protection of the present application may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0042] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meanings understood by persons with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components.

[0043] Please refer to Figures 1 to 3 , the embodiment of the present application discloses an electromagnetic proportional valve suitable for complex temperature environments, wherein, Figure 1 : shows a schematic structural diagram of an exemplary electromagnetic proportional valve disclosed in an embodiment of the present application, Figure 2 for Figure 1 A cross-sectional view of a solenoid proportional valve is shown. Figure 3 for Figure 2 In general, the electromagnetic proportional valve disclosed in the embodiment of the present application may include a valve seat 10 , a valve core 20 (which may also be understood as a moving iron core), a sealing member 30 and a resetting elastic member 40 .

[0044] In the embodiment of the present application, the valve seat 10 is used to provide a carrier for the installation of the valve core 20 and related components such as the actuating mechanism 50 to be described below. Figure 2 or Figure 3As shown, the valve seat 10 further defines a valve cavity 11 and a valve port 12 located inside the valve cavity 11. At the same time, in order to realize the basic function of the electromagnetic proportional valve as a valve, the valve seat 10 also defines an inlet channel 13 and an outlet channel 14 connected to the valve cavity 11. The inlet channel 13 and the outlet channel 14 are used to allow the corresponding fluid medium to enter and exit the valve cavity 11, and the valve port 12 is arranged at the connection between the valve cavity 11 and the inlet channel 13 or the outlet channel 14. For example, the valve port 12 of the electromagnetic proportional valve disclosed in the embodiment of the present application is arranged at the connection between the valve cavity 11 and the outlet channel 14. In this way, when the valve port 12 is closed, the fluid medium will not be able to flow out of the valve cavity 11 through the outlet channel 14; on the contrary, when the valve port 12 is opened, the fluid medium entering the valve cavity 11 through the inlet channel 13 can flow through the valve port 12 and finally flow out from the outlet channel 14.

[0045] It can be understood that in some embodiments of the present application, corresponding filter elements 15, such as filter nets, can also be provided inside the inlet channel 13 and the outlet channel 14, so as to utilize the filter element 15 to filter the fluid medium flowing through the inlet channel 13 or the outlet channel 14, thereby preventing impurities or foreign matter in the fluid medium from entering the valve chamber 11 through the inlet channel 13, or impurities or foreign matter inside the valve chamber 11 from flowing out through the outlet channel 14, thereby improving the purity of the fluid medium finally flowing out from the outlet channel 14.

[0046] In the embodiment of the present application, the valve core 20 is used to cooperate with the sealing member 30 with elastic deformation ability to realize the opening and closing of the valve port 12. Specifically, the valve core 20 has a first end and a second end. The first end of the valve core 20 is located inside the valve cavity 11 and is aligned with the valve port 12. The sealing member 30 with elastic deformation ability is arranged at the first end of the valve core 20, and the sealing member 30 is aligned with the sealing surface of the valve port 12. In this way, when the valve core 20 drives the sealing member 30 to move in the direction of the valve port 12 to close the valve port 12, the sealing member 30 will squeeze the sealing surface of the valve port 12. In this process, the sealing member 30 will be squeezed and deformed to a certain extent. Specifically, the sealing member 30 will be concave inward (that is, concave in the direction away from the sealing surface of the valve port 12) to rely on the sealing member 30 to reliably seal the valve port 12. Among them, the sealing member 30 is made of a highly elastic material so that the sealing member 30 has a highly elastic property.

[0047] On this basis, in order to overcome the technical problem that the seal 30 cannot reliably seal the valve port 12 when the seal 30 is affected by low temperature, the electromagnetic proportional valve disclosed in the embodiment of the present application is additionally provided with a reset elastic component 40. Among them, the reset elastic component 40 is arranged inside the valve core 20, and the reset elastic component 40 is used to elastically maintain the seal 30 at the first end of the valve core 20, and the reset elastic component 40 is also configured to: when the seal 30 is squeezed and deformed inwardly, a force is provided to the seal 30 to restore the sealing ability of the seal 30.

[0048] In this way, assuming that in the initial state, the valve core 20 drives the seal 30 to move in the direction of the valve port 12, when the seal 30 contacts the sealing surface of the valve port 12, as the valve core 20 continues to move, the seal 30 is compressed and undergoes an inward concave extrusion deformation. In this process, the part of the seal 30 that is extruded and deformed will squeeze the reset elastic component 40. At this time, the reset elastic component 40 is compressed and pre-stores an elastic force. Correspondingly, when the electromagnetic proportional valve is used in a low-temperature environment and the high elastic properties of the seal 30 are affected by the low temperature, in the process of opening the valve port 12, as the valve core 20 drives the seal 30 to move in a direction away from the valve port 12, when the seal 30 is out of contact with the sealing surface of the valve port 12, the reset elastic component 40 can release the pre-stored elastic force and force the part of the seal 30 that has been squeezed and deformed to restore the sealing ability, which is specifically manifested as: when the valve core 20 drives the seal 30 to seal the valve port 12 again, the sealing surface of the valve port 12 will apply a force to the seal 30 that squeezes and deforms the seal 30, and the reset elastic component 40 can apply a force to the seal 30 that is opposite to the force applied by the sealing surface of the valve port 12, so that the seal 30 can be re-sealed with the valve port 12.

[0049] It can be seen that the electromagnetic proportional valve provided in the embodiment of the present application adds a reset elastic component 40 on the valve core 20 to restore the sealing ability of the seal 30. When the high elasticity of the seal 30 is affected by low temperature, the reset elastic component 40 can make the seal 30 that has been squeezed and deformed fit and seal with the valve port 12 again, so that the electromagnetic proportional valve can still have good sealing performance when used in a complex temperature environment as much as possible. At the same time, during the opening process of the valve port 12 of the electromagnetic proportional valve, since the reset elastic component 40 can speed up the speed at which the squeezed and deformed part of the seal 30 recovers to the undeformed state, it is beneficial to enable the output flow of the electromagnetic proportional valve to reach the predetermined requirement within a shorter time range, thereby reducing the response time of the electromagnetic proportional valve.

[0050] In some embodiments of the present application, the installation of the sealing member 30 and the resetting elastic member 40 can be achieved in the following manner. Figure 3 As shown, the first end of the valve core 20 is provided with a downwardly open accommodating cavity 21 , the sealing member 30 is provided at the first end of the valve core 20 and seals the opening of the accommodating cavity 21 , and the reset elastic member 40 is provided in the accommodating cavity 21 .

[0051] It is understandable that in actual implementation, combined with Figure 3 and Figure 4As shown in the figure, the sealing member 30 may further include a sealing diaphragm 31 and a diaphragm gland 32, wherein the sealing diaphragm 31 is made of a highly elastic material so that the sealing diaphragm 31 has good elastic deformation capability, and the sealing diaphragm 31 is arranged at the opening of the accommodating cavity 21. The diaphragm gland 32 is buckled at the first end of the valve core 20, so that the sealing diaphragm 31 is reliably held at the opening of the accommodating cavity 21 through the diaphragm gland 32, and the diaphragm gland 32 is provided with a notch that exposes part of the sealing diaphragm 31, so that part of the sealing diaphragm 31 can be exposed through the notch and aligned with the sealing surface of the valve port 12, so that the valve port 12 can be reliably sealed by relying on the sealing diaphragm 31.

[0052] Furthermore, in some embodiments of the present application, continue to refer to Figure 3 and Figure 4 , the reset elastic component 40 may further include a reset portion 41 and a reset elastic member 42. The reset portion 41 is disposed in the accommodating chamber 21 and abuts against the sealing member 30 (specifically, the sealing diaphragm 31). Preferably, the reset portion 41 may be a spherical sphere, and the sealing diaphragm 31 of the sealing member 30 is provided with an arc-shaped groove adapted to the reset portion 41 on one side facing the reset portion 41, so as to improve the reliability of the reset portion 41 and the sealing diaphragm 31 when they abut against each other. The reset elastic member 42 is disposed in the accommodating chamber 21, and the two ends of the reset elastic member 42 are respectively connected to the reset portion 41 and the valve core 20 (specifically, the inner wall of the accommodating chamber 21). The reset elastic member 42 may be, but is not limited to, a straight spring.

[0053] Thus, under normal conditions, the sealing diaphragm 31 constituting the sealing member 30 is reliably retained at the first end of the valve core 20 under the cooperation of the diaphragm gland 32 and the reset portion 41. On this basis, in combination with the above, when the valve core 20 drives the sealing member 30 to move toward the direction of the valve port 12 so that the sealing diaphragm 31 contacts the sealing surface of the valve port 12, as the valve core 20 continues to move, the sealing diaphragm 31 is compressed and deforms inwardly by being squeezed and deformed. In this process, the part of the sealing diaphragm 31 that is squeezed and deformed will squeeze the reset elastic member 42 through the reset portion 41. At this time, the reset elastic member 42 is compressed and pre-stores an elastic force. Accordingly, when the electromagnetic proportional valve is used in a low-temperature environment and the high elastic properties of the sealing diaphragm 31 are affected by the low temperature, in the process of opening the valve port 12, as the valve core 20 drives the sealing member 30 to move away from the valve port 12, when the sealing diaphragm 31 is out of contact with the sealing surface of the valve port 12, the reset elastic member 42 can release the pre-stored elastic force and push the reset portion 41, thereby forcing the portion of the sealing diaphragm 31 that has been squeezed and deformed to restore its sealing ability through the reset portion 41, thereby allowing the sealing diaphragm 31 to prepare for the next sealing of the valve port 12.

[0054] On this basis, in order to enable the first end of the valve core 20 to drive the sealing member 30 to approach or move away from the valve port 12, thereby closing or opening the valve port 12, in some embodiments of the present application, the electromagnetic proportional valve may further include an actuating mechanism 50. The actuating mechanism 50 is configured to drive the first end of the valve core 20 to approach or move away from the valve port 12, so as to seal the valve port 12 or release the seal of the valve port 12 through the sealing member 30, that is, to close or open the valve port 12.

[0055] In some embodiments of the present application, in order to realize the installation of the actuating mechanism 50, the Figure 3 As shown in the figure, the valve seat 10 further defines an installation cavity 16 in communication with the valve cavity 11, and the second end of the valve core 20 passes through the installation cavity 16. It can be understood that in order to achieve a reliable seal between the installation cavity 16 and the valve cavity 11, a sealing ring 17 surrounding the valve core 20 can be provided at the communication position between the installation cavity 16 and the valve cavity 11 to prevent the fluid medium flowing into the valve cavity 11 from leaking.

[0056] At this time, if Figure 2 As shown, the actuating mechanism 50 may include a magnetic assembly 51 and an actuating elastic member 52. The magnetic assembly 51 is disposed outside the valve seat 10, and the magnetic assembly 51 is configured to apply an electromagnetic force to the valve core 20 to force the first end of the valve core 20 to be away from the valve port 12. Furthermore, the magnetic assembly 51 may further include a housing 511, a static iron core 512, a coil 513, and a coil skeleton 514.

[0057] The housing 511 is disposed on one side of the valve seat 10. Preferably, the housing 511 may be a C-shaped structure to simplify the structure of the housing 511 as much as possible and reduce the weight and cost of the housing 511. The second end of the valve core 20 extends to the inside of the housing 511. The static iron core 512 is also disposed inside the housing 511, and the static iron core 512 is disposed opposite to the valve core 20. The coil 513 is wound inside the housing 511 through a coil frame 514, and the coil 513 is disposed around the valve core 20 and the static iron core 512.

[0058] Combination Figures 2 to 4 As shown in the figure, the actuating elastic member 52 is sleeved on the outer wall of the valve core 20 and is located in the installation cavity 16, and the actuating elastic member 52 is configured to provide a force to the valve core 20 to force the first end of the valve core 20 to approach the valve port 12 when the first end of the valve core 20 is away from the valve port 12. In other words, the two ends of the actuating elastic member 52 sleeved on the outer wall of the valve core 20 are respectively connected to the valve core 20 and the valve seat 10 (specifically, the inner wall of the installation cavity 16). The actuating elastic member 52 can be, but is not limited to, a spring. In this case, it is only necessary to set a certain clearance space in the installation cavity 16 at the first end of the spring away from the valve core 20 so that the spring can be smoothly elastically deformed.

[0059] In this way, assuming that in the initial state, the coil 513 is not energized, at this time, the valve core 20 moves toward the valve port 12 under the elastic force applied by the actuating elastic member 52, thereby reliably sealing the valve port 12 by relying on the sealing member 30 provided at the first end of the valve core 20. Correspondingly, when the coil 513 is energized, an electromagnetic force will be generated. At this time, under the action of the electromagnetic force, the valve core 20 has a tendency to move in the direction of the static iron core 512. As the current passed into the coil 513 gradually increases, the electromagnetic force will also gradually increase. When the electromagnetic force is greater than the elastic force applied to the valve core 20 by the actuating elastic member 52, the valve core 20 will overcome the elastic force of the actuating elastic member 52 and move in the direction of the static iron core 512, thereby driving the sealing member 30 to move synchronously through the valve core 20 to open the valve port 12; in this process, the actuating elastic member 52 can pre-store an elastic force. When the coil 513 is de-energized again, the electromagnetic force acting on the valve core 20 will gradually weaken until it disappears. The valve core 20 will move in the direction of the valve port 12 under the action of the elastic force released by the actuating elastic member 52, so as to drive the sealing member 30 to reliably seal the valve port 12.

[0060] Furthermore, in practical applications, it is only necessary to reasonably control the magnitude of the current passed into the coil 513 to reasonably control the magnitude of the electromagnetic force acting on the valve core 20 , thereby achieving control of the opening of the valve port 12 .

[0061] Further, in some embodiments of the present application, in combination with Figure 5 and Figure 6 As shown in the figure, the actuating elastic member 52 is provided with a mounting hole 521 for the valve core 20 to pass through, and the inner wall of the mounting hole 521 is provided with a plurality of arc-shaped contact portions 522 and hollow portions 523 sequentially arranged along the circumference of the valve core 20, wherein the arc-shaped contact portion 522 is in contact with and connected to the outer wall of the valve core 20, and a gap is formed between the hollow portion 523 and the outer wall of the valve core 20. Figure 5 , an actuating elastic member 52 is shown in which three arc-shaped contact portions 522 and three hollow portions 523 are provided on the inner wall of the mounting hole 521, and the three arc-shaped contact portions 522 and the three hollow portions 523 are evenly distributed along the circumference of the valve core 20. It can be understood that by adopting the actuating elastic member 52 of the above structure, it is helpful to simplify the structure of the actuating elastic member 52 and effectively improve the reliability of the actuating elastic member 52 when applying the corresponding elastic force to the valve core 20.

[0062] At the same time, in some implementations of the present application, such as Figure 2 As shown, the magnetic assembly 51 may further include a magnetic ring 515, which is disposed inside the housing 511 and sleeved outside the valve core 20. It is understandable that the arrangement of the magnetic ring 515 is conducive to making the electromagnetic force generated by the coil 513 when it is energized act on the valve core 20 better.

[0063] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electromagnetic proportional valve suitable for complex temperature environments, characterized in that: include: A valve seat, defining a valve cavity inside, and a valve port located inside the valve cavity; A valve core having a first end located inside the valve cavity; A sealing member with elastic deformation capability, disposed at the first end of the valve core and aligned with the sealing surface of the valve port; A reset elastic component is arranged inside the valve core and is used to elastically maintain the seal at the first end of the valve core; the reset elastic component is also configured to provide a force to the seal to restore the sealing ability of the seal when the seal undergoes an inwardly concave extrusion deformation.

2. The electromagnetic proportional valve suitable for complex temperature environment according to claim 1, characterized in that: The first end of the valve core is provided with an accommodating cavity which is open downwards, the sealing member seals the opening of the accommodating cavity, and the resetting elastic component is arranged in the accommodating cavity.

3. The electromagnetic proportional valve suitable for complex temperature environment according to claim 2, characterized in that: The resetting elastic component comprises: A reset portion, disposed in the accommodating cavity and abutting against the sealing member; The resetting elastic member is arranged in the accommodating cavity, and two ends thereof are respectively connected to the resetting portion and the valve core.

4. The electromagnetic proportional valve suitable for complex temperature environment according to claim 3, characterized in that: The resetting portion is spherical, and an arc-shaped groove matching the resetting portion is provided on one side of the sealing member facing the resetting portion.

5. The electromagnetic proportional valve suitable for complex temperature environment according to any one of claims 1 to 4, characterized in that: An actuating mechanism is also included, and the actuating mechanism is configured to drive the first end of the valve core to approach or move away from the valve port, so as to seal the valve port through the sealing member or release the sealing of the valve port.

6. The electromagnetic proportional valve suitable for complex temperature environment according to claim 5, characterized in that: The valve seat defines an installation cavity in communication with the valve cavity, and the second end of the valve core passes through the installation cavity; The actuating mechanism comprises: A magnetic assembly, disposed outside the valve seat and configured to apply an electromagnetic force to the valve core to force the first end of the valve core to move away from the valve port; An actuating elastic member is sleeved on the outer wall of the valve core and is located in the installation cavity; the actuating elastic member is configured to provide a force to the valve core to force the first end of the valve core to approach the valve port when the first end of the valve core is away from the valve port.

7. The electromagnetic proportional valve suitable for complex temperature environment according to claim 6, characterized in that: The actuating elastic member is provided with a mounting hole for the valve core to pass through, and the inner wall of the mounting hole is provided with a plurality of arc-shaped contact portions and hollow portions arranged in sequence along the circumference of the valve core, the arc-shaped contact portions are in contact with and connected to the outer wall of the valve core, and a gap is formed between the hollow portions and the outer wall of the valve core.

8. The electromagnetic proportional valve suitable for complex temperature environment according to claim 6, characterized in that: The magnetic assembly comprises: A housing is provided on one side of the valve seat; the second end of the valve core extends into the interior of the housing; A static iron core is arranged inside the housing and is arranged opposite to the valve core; The coil is wound inside the shell through a coil frame, and the coil is arranged around the valve core and the static iron core.

9. The electromagnetic proportional valve suitable for complex temperature environment according to claim 8, characterized in that: The magnetic assembly also includes a magnetic conductive ring; the magnetic conductive ring is arranged inside the shell and sleeved on the outside of the valve core.

10. The electromagnetic proportional valve suitable for complex temperature environment according to claim 1, characterized in that: The valve seat further defines an inlet flow channel and an outlet flow channel communicating with the valve cavity, and the valve port is provided at a connection point between the valve cavity and the inlet flow channel or the outlet flow channel; Filters are arranged inside the inlet channel and the outlet channel.

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