Electromagnetic valve, heat pump system and vehicle

Abstract

The invention discloses an electromagnetic valve, a heat pump system and a vehicle. The solenoid valve includes: a valve body; the static iron core is provided with a protruding part, and the protruding part is fixedly connected with the valve body; and at least part of the coil assembly is located on the periphery of the static iron core, and the coil assembly and the protruding part are arranged in a contact or clearance mode. According to the electromagnetic valve, the contact face of the coil assembly can be enlarged through the protruding part of the static iron core, electromagnetic force can better pass through the coil assembly, the performance of the electromagnetic valve is higher under the same size while the coil assembly can be properly reduced, the lowest starting voltage for opening the electromagnetic valve can be reduced, and therefore energy consumption of the electromagnetic valve is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a solenoid valve, a heat pump system and a vehicle. Background Art

[0002] Heat pump systems in vehicles and other equipment often feature solenoid valves. These valves, whose working medium is refrigerant, offer low noise, low power consumption, high sensitivity, and a low starting voltage. The solenoid valve's opening is controlled by a coil signal, thereby ensuring flow continuity. Increasing flow typically requires a larger solenoid valve, which in turn requires increasing the drive voltage to boost the electromagnetic force. However, these methods increase the solenoid valve's energy consumption, leaving room for improvement. Summary of the Invention

[0003] Embodiments of the present application provide a solenoid valve, a heat pump system, and a vehicle to reduce energy consumption of the solenoid valve.

[0004] In a first aspect, an embodiment of the present application provides a solenoid valve, which includes: a valve body; a static iron core, the static iron core having a protrusion, the protrusion being fixedly connected to the valve body; a coil assembly, at least part of the coil assembly being located on the outer periphery of the static iron core, the coil assembly being in axial contact with the protrusion or arranged along an axial gap.

[0005] According to the solenoid valve of the embodiment of the present application, the coil assembly is in axial contact with the raised portion of the static iron core or is arranged along an axial gap. The raised portion of the static iron core can increase the contact surface of the coil assembly, so that the electromagnetic force can pass through better. The coil assembly can be appropriately reduced, and the performance of the solenoid valve is stronger at the same volume. The minimum starting voltage for opening the solenoid valve can be reduced, thereby reducing the energy consumption of the solenoid valve.

[0006] In some embodiments, the protrusion includes: a first step surface, the first step surface extends radially and is in axial contact with the coil assembly or is arranged along an axial gap; a first step side wall, the first step side wall is connected to the first step surface, and the first step side wall is fixedly connected to the first inner wall of the valve body.

[0007] In some embodiments, the raised portion further includes: a second step surface, the second step surface is connected to the side wall of the first step, and the second step surface is fixedly connected to the second inner wall of the valve body.

[0008] In some embodiments, the raised portion further includes: a second step side wall, the second step side wall is connected to the second step surface, and the second step side wall is fixedly connected to the third inner wall of the valve body.

[0009] In some embodiments, a radial dimension of the second step surface is greater than a radial dimension of the first step surface.

[0010] In some embodiments, the coil assembly includes a coil and a magnetic conductive member, the coil is disposed on the magnetic conductive member, and the magnetic conductive member is in axial contact with the first step surface or is disposed along an axial gap.

[0011] In some embodiments, the static iron core is made of 00Cr18Si2Mo2, 00Cr13Si2 or other magnetic conductive materials.

[0012] In some embodiments, the protrusion is interference fit with the valve body, and / or the protrusion is fixed to the valve body by welding.

[0013] In some embodiments, the solenoid valve further includes: an iron core cover, the iron core cover is fixedly connected to the static iron core, and the coil assembly sleeve is arranged on the outer periphery of the iron core cover.

[0014] In some embodiments, the solenoid valve further includes: a moving iron core, at least part of which is disposed in the core cover, the moving iron core being mounted on an end of the core cover away from the valve body, and the static iron core being capable of driving the moving iron core to move relative to the core cover.

[0015] In some embodiments, the moving iron core is disposed in an iron core cover, and a buffer is provided between the iron core cover and the moving iron core.

[0016] In some embodiments, the solenoid valve also includes: a driving rod, one end of which is connected to the moving iron core, the static iron core is provided with a through hole, at least part of the driving rod is located in the through hole of the static iron core, and the moving iron core can drive the driving rod to move relative to the valve body.

[0017] In some embodiments, the through hole includes a first through hole, the first through hole is located on a side of the static iron core close to the movable iron core, and the first through hole is a tapered hole.

[0018] In some embodiments, the through hole includes a second through hole, the second through hole is located on a side of the static iron core close to the valve body, and the second through hole is a waist-shaped hole.

[0019] In some embodiments, a first elastic member is sleeved on the driving rod, one end of the first elastic member is fixed to the static iron core, and the other end of the first elastic member is fixed to the moving iron core or the driving rod.

[0020] In some embodiments, the solenoid valve further includes: a valve core assembly, which is movably connected to the valve body, the other end of the drive rod can cooperate with the valve core assembly, and the moving iron core can drive the valve core assembly to move axially along the solenoid valve.

[0021] In some embodiments, the valve body includes: a valve body, the protrusion is fixedly connected to the valve body; a valve seat, the valve seat is provided with a first channel and a second channel, and the valve core assembly is arranged in the valve cavity formed by the valve body and the valve seat, for connecting or disconnecting the first channel and the second channel.

[0022] In some embodiments, the valve body is made of SUS304 or other metal materials.

[0023] In some embodiments, a second elastic member is provided between the valve core assembly and the valve seat.

[0024] In some embodiments, the solenoid valve further includes: a fixing member, which is disposed on the outer periphery of the valve body and is suitable for connecting with the mounting body.

[0025] In some embodiments, an anti-loosening washer is provided between the fixing member and the valve body, and the anti-loosening washer is arranged in the installation groove of the fixing member or the installation groove of the valve body.

[0026] In some embodiments, at least a portion of a mating surface between the fixing member and the valve body is an inclined surface, and the inclined surface is used to contact the anti-loosening washer.

[0027] In some embodiments, the solenoid valve further includes: a first sealing member, the first sealing member being sealingly connected to the exterior of the valve body; and / or a second sealing member, the second sealing member being sealingly connected to the exterior of the valve seat.

[0028] In a second aspect, embodiments of the present application provide a heat pump system comprising the aforementioned solenoid valve and a mounting body, wherein the solenoid valve is mounted on the mounting body. By employing the aforementioned solenoid valve, the raised portion of the static iron core can increase the contact surface of the coil assembly, allowing for better transmission of electromagnetic force. While the coil assembly can be appropriately reduced, the solenoid valve maintains enhanced performance within the same volume, lowering the minimum starting voltage required to open the solenoid valve and reducing energy consumption, thereby improving the overall performance of the heat pump system.

[0029] In a third aspect, embodiments of the present application provide a vehicle comprising the aforementioned solenoid valve or heat pump system. By employing the aforementioned solenoid valve, the raised portion of the static iron core can increase the contact surface of the coil assembly, allowing for better transmission of electromagnetic force. This allows the coil assembly to be appropriately reduced, while maintaining enhanced solenoid valve performance within the same volume. This can also reduce the minimum starting voltage required to open the solenoid valve, lowering its energy consumption and thereby improving the overall performance of the vehicle.

[0030] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a cross-sectional view of a solenoid valve according to an embodiment of the present application;

[0032] Figure 2 A second cross-sectional view of the solenoid valve provided in an embodiment of the present application;

[0033] Figure 3 (a) is a three-dimensional view of the valve body provided in an embodiment of the present application;

[0034] Figure 3 (b) is a cross-sectional view of the valve body provided in an embodiment of the present application;

[0035] Figure 4 (a) is a three-dimensional diagram of the static iron core provided in an embodiment of the present application;

[0036] Figure 4 (b) is a cross-sectional view of the static iron core provided in an embodiment of the present application;

[0037] Figure 5 A cross-sectional view of the static iron core and the valve body provided in an embodiment of the present application;

[0038] Figure 6 A front view of the solenoid valve provided in an embodiment of the present application;

[0039] Figure 7 A three-dimensional diagram of a solenoid valve provided in an embodiment of the present application;

[0040] Figure 8 A schematic diagram of a vehicle provided in accordance with an embodiment of the present application.

[0041] Reference numerals:

[0042] Solenoid valve 100, heat pump system 200, vehicle 300, mounting body 400, valve body 10, valve body 11, first inner wall 11a, second inner wall 11b, third inner wall 11c, valve seat 12, first channel 121, second channel 122, side wall 123, bottom wall 124, valve chamber 13, static iron core 20, protrusion 21, first step surface 21a, first step side wall 21b, second step surface 21c, second step side wall 21d, through hole 22, coil assembly 30, coil 31, magnetic conductive part 32, iron core cover 40, buffer part 41, moving iron core 50, drive rod 51, first elastic part 52, valve core assembly 60, second elastic part 61, fixing part 70, anti-loosening washer 71, first sealing part 81, second sealing part 82. DETAILED DESCRIPTION

[0043] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0044] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0045] The following combination Figures 1 to 8 The solenoid valve 100 , the heat pump system 200 , and the vehicle 300 according to the embodiments of the present application are described in detail.

[0046] In the following description of the embodiments, for ease of understanding, terms indicating directions (such as "above", "below", "upper end face", etc.) are appropriately used. Taking the normally open solenoid valve as an example, when the solenoid valve 100 is energized to open the valve, the movement direction of the moving iron core 50 is "below", and when the solenoid valve 100 is de-energized to close the valve, the movement direction of the moving iron core 50 is "above". Of course, for the normally closed solenoid valve, when the solenoid valve 100 is energized to close the valve, the movement direction of the moving iron core 50 is "above". The above terms are not limitations of this application. The "axial" mentioned herein refers to the movement direction or up and down direction of the moving iron core 50. The "axial" of the solenoid valve 100 is as follows: Figure 5 The NS direction is shown, and the "radial" direction is perpendicular to the axial direction.

[0047] Reference Figures 1 to 7 As shown, the solenoid valve 100 includes: a valve body 10, a static iron core 20, a coil assembly 30, a movable iron core 50 and a valve core assembly 60. The valve body 10 includes a valve body 11 and a valve seat 12. The valve body 11 is fixedly connected or limit-connected to the valve seat 12. The coil assembly 30 is sleeved on the outer circumference of the static iron core 20 and the movable iron core 50. The valve core assembly 60 is disposed in a valve cavity 13 formed by the valve body 11 and the valve seat 12. The valve core assembly 60 can move relative to the valve seat 12 under the drive of the movable iron core 50, thereby opening or closing the valve port of the solenoid valve 100. The solenoid valve 100 can be mounted on a mounting body 400. The mounting body 400 can be a structural component of a vehicle 300 or a structural component of a heat pump system 200 (such as an air conditioner or other heat pump system). The coil assembly 30 and the valve body 10 of the solenoid valve 100 can be separately mounted on the mounting body 400 , or the valve body 10 can be mounted on the mounting body 400 and the coil assembly 30 can be mounted on the outer periphery of the static iron core 20 and the movable iron core 50 .

[0048] In the examples of this application, refer to Figure 1 and Figure 2As shown, the solenoid valve 100 includes: a valve body 10, a static iron core 20 and a coil assembly 30, wherein the static iron core 20 has a protrusion 21, and the protrusion 21 is fixedly connected to the valve body 10; at least a portion of the coil assembly 30 is located on the outer periphery of the static iron core 20, and the coil assembly 30 and the protrusion 21 are in axial contact or arranged along an axial gap. Among them, the axial contact between the coil assembly 30 and the protrusion 21 can be that the coil assembly 30 and the protrusion 21 are in at least partial axial contact, and the relative position of the protrusion 21 and the coil assembly 30 can be a regular plane, or a curved surface or an irregular shape. The coil assembly 30 and the protrusion 21 are arranged along the axial gap, and the axial gap between the coil assembly 30 and the protrusion 21 can be a uniform air gap or a non-uniform air gap. Optionally, the protrusion 21 is arranged at the bottom of the static iron core 20.

[0049] According to the solenoid valve 100 of the embodiment of the present application, the static iron core 20 is provided with a protrusion 21, and the static iron core 20 is accommodated in the through hole of the coil assembly 30. The coil assembly 30 on the outer periphery of the static iron core 20 is in axial contact with the protrusion 21 of the static iron core 20 or is arranged along the axial gap. The protrusion 21 of the static iron core 20 can increase the axial contact surface or axial opposite surface between the coil assembly 30 and the static iron core 20, so that the electromagnetic force can pass better. While the coil assembly 30 can be appropriately reduced, the performance of the solenoid valve 100 is stronger at the same volume, and the minimum starting voltage for opening the solenoid valve 100 can be reduced, thereby reducing the energy consumption of the solenoid valve 100. At the same time, the overall structure of the solenoid valve 100 is simple to assemble and operates stably and reliably, which is conducive to reducing manufacturing costs and subsequent maintenance costs.

[0050] It is understood that the static iron core 20 is a fixed component, and its magnetic conductivity is used to form a closed magnetic circuit. In the embodiment of the present application, the static iron core 20 is a rotating body structure, for example, it can be modified based on the basic structure of a cylinder.

[0051] In the examples of this application, refer to Figures 3 to 5 As shown, the raised portion 21 includes: a first step surface 21a, which extends radially and is in axial contact with the coil assembly 30 or is provided with an axial gap; and a first step sidewall 21b, which is connected to the first step surface 21a and fixedly connected to the first inner wall 11a of the valve body 10. The first step surface 21a can extend only radially, or it can extend radially while extending axially and / or circumferentially. Optionally, the first step surface 21a is an annular surface, and along the axial direction of the solenoid valve 100, the first step surface 21a is in contact with the coil assembly 30 or is provided with a gap, which is beneficial to improving electromagnetic performance.

[0052] In the embodiment of the present application, the first step surface 21a of the raised portion 21 extends radially, and at least a portion of the radial and axial directions of the static iron core 20 is in contact with or provided with a gap therebetween, while at least a portion of the axial direction of the valve body 10 is in contact with or provided with a gap therebetween. When the first step surface 21a of the raised portion 21 is in axial contact with the coil assembly 30, the radial plane of the first step surface 21a can increase the contact surface of the coil assembly 30, thereby reducing or avoiding the interference of the valve body 10 with the magnetic path of the coil assembly 30 and the static iron core 20, allowing the electromagnetic force to pass better, reducing the energy consumption of the solenoid valve 100, thereby facilitating the improvement of electromagnetic performance. At the same time, the coil of the solenoid valve 100 with the same performance can be made smaller, thereby meeting the requirements of cost reduction, lightweighting, and miniaturization. When the first step surface 21a of the protrusion 21 is arranged along the axial gap with the coil assembly 30, the static iron core 20 has at least a portion of the radial and axial gap arranged with the coil assembly 30. The setting of the first step surface 21a can also reduce or avoid the interference of the valve body 10 on the magnetic path of the coil assembly 30 and the static iron core 20, so that the electromagnetic force can pass better, which is beneficial to improving the electromagnetic performance.

[0053] It is understood that the first stepped surface 21a may not be an absolutely flat surface and may include concave and / or convex portions, as long as the first stepped surface 21a extends radially. Furthermore, the first stepped sidewall 21b and the first inner wall 11a may not be absolutely flat surfaces and may include concave and / or convex portions.

[0054] In this embodiment of the present application, the raised portion 21 further includes a second stepped surface 21c, which is connected to the first stepped sidewall 21b and fixedly connected to the second inner wall 11b of the valve body 10. The second stepped surface 21c of the raised portion 21 extends radially along the static iron core 20, the first stepped sidewall 21b is fixedly connected to the first inner wall 11a of the valve body 10, and the second stepped surface 21c is fixedly connected to the second inner wall 11b of the valve body 10, thereby improving the stability of the fixed connection between the raised portion 21 and the valve body 10. Optionally, the second stepped surface 21c is an annular surface.

[0055] In the embodiment of the present application, the raised portion 21 further includes a second stepped sidewall 21d, which is connected to the second stepped surface 21c and fixedly connected to the third inner wall 11c of the valve body 10. The raised portion 21 of the static iron core 1 is a double-layered stepped surface. The first inner wall 11a, the second inner wall 11b, and the third inner wall 11c of the valve body 10 form an internal step. The first stepped sidewall 21b, the second stepped surface 21c, and the second stepped sidewall 21d of the raised portion 21 are used to cooperate with and be fixed to the internal step of the valve body 10, which can further improve the fixing stability of the raised portion 21 and the valve body 10.

[0056] In the embodiment of the present application, the radial dimension of the second stepped surface 21c is greater than the radial dimension of the first stepped surface 21a. Accordingly, the first inner wall 11a of the valve body 10 is located radially inward of the third inner wall 11c. The larger radial dimension of the second stepped surface 21c enables the valve body 10 to better axially limit the static iron core 20, allowing the static iron core 20 to be assembled from the third inner wall 11c of the valve body 10 toward the first inner wall 11a.

[0057] In the embodiment of the present application, the radial dimension of the second stepped surface 21c can also be smaller than the radial dimension of the first stepped surface 21a. Correspondingly, the first inner wall 11a of the valve body 10 is located radially outward of the third inner wall 11c. The internal step of the valve body 10 is inversely matched with the raised portion 21 of the static iron core 20, and the static iron core 20 can be assembled from the outside of the valve body 10.

[0058] In the embodiment of the present application, the coil assembly 30 includes a coil 31 and a magnetic conductive member 32. The coil 31 is arranged on the magnetic conductive member 32. The magnetic conductive member 32 is in axial contact with the first step surface 21a or is arranged in an axial gap. The magnetic conductive member 32 can increase the magnetic field when the coil 31 is energized. The coil assembly 30 has a through hole. Specifically, the magnetic conductive member 32 and / or the coil 31 have a through hole. At least a portion of the static iron core 20 is located in the through hole of the coil assembly 30. Along the axial direction of the solenoid valve 100, the first step surface 21a of the protrusion 21 and at least a portion of the axial direction of the valve body 10 are in contact with the magnetic conductive member 32 or are arranged in a gap, which is beneficial to improving the electromagnetic performance.

[0059] In the embodiment of the present application, the static iron core 20 is made of 00Cr18Si2Mo2, 00Cr13Si2, or other magnetically conductive materials. The static iron core 20 is made of a magnetically conductive material. Therefore, when the coil assembly 30 is energized, the static iron core 20 can drive the moving iron core to move toward or away from the static iron core 20.

[0060] In the embodiment of the present application, the raised portion 21 is interference fit with the valve body 10, and / or the raised portion 21 is welded to the valve body 10. The raised portion 21 and the valve body 10 are fixedly connected to form a small assembly. The raised portion 21 and the valve body 10 may only be interference fit, may only be fixed by welding, or may be interference fit followed by welding.

[0061] In the embodiment of the present application, the valve body 10 can be made of metal material, which is beneficial to improving the structural strength of the valve body 10, so that the valve body 10 can bear a larger size of the static iron core 20, thereby improving the electromagnetic performance. The static iron core 20 and the valve body 10 are set separately. The magnetic permeability of the valve body 10 is less than that of the static iron core 20. Compared with the magnetic conductive material in which the valve body 10 and the static iron core 20 are integrated, the valve body 10 can be made of a material with relatively low magnetic permeability or non-magnetic conductive material, which is beneficial to reducing costs. Optionally, the valve body 10 is a rotating body structure, for example, it can be modified based on the basic structure of a cylinder.

[0062] In the embodiment of the present application, the solenoid valve 100 further includes a core cover 40, which is fixedly connected to the static iron core 20. The coil assembly 30 is disposed around the outer periphery of the core cover 40. At least a portion of the core cover 40 is located within the through hole of the coil assembly 30, making the connection structure between the coil assembly 30 and the core cover 40 more compact.

[0063] In the embodiment of the present application, the core cover 40 can be made of a magnetic isolation material (eg, SUS305) and is a rotating body structure. Optionally, the core cover 40 and the static core 20 are interference-fitted and then welded together.

[0064] In an embodiment of the present application, a groove portion is provided at one end of the static iron core 20 away from the valve body 10. Along the axial direction of the solenoid valve 100, the groove portion of the static iron core 20 contacts and is fixedly connected to the core cover 40. The groove portion of the static iron core 20 and the core cover 40 can be welded, clamped, and / or bonded. Optionally, the groove portion of the static iron core 20 is welded to the core cover 40 after interference fit. When the static iron core 20 and the core cover 40 are assembled, the groove portion of the static iron core 20 can limit the radial position of the core cover 40, thereby improving the efficiency of the press-fitting process. By providing the groove portion, the possibility of over-pressing is reduced when the static iron core 20 and the core cover 40 are assembled, and the possibility of the wall of the core cover 40 being deformed by over-pressing is reduced. In an embodiment of the present application, when the core cover 40 and the static iron core 20 are welded, the contact portion between the groove portion and the core cover 40 is welded, which can make the welding between the core cover 40 and the static iron core 20 more reliable.

[0065] In the embodiment of the present application, the solenoid valve 100 further includes a moving iron core 50, at least a portion of which is disposed within the iron core cover 40. The moving iron core 50 is mounted on an end of the iron core cover 40 away from the valve body 10, and the static iron core 20 can drive the moving iron core 50 to move relative to the iron core cover 40. The iron core cover 40 is away from the valve body 10 relative to the static iron core 20, and at least a portion of the moving iron core 50 is located within the iron core cover 40. The static iron core 20 is fixedly connected to the iron core cover 40. Along the axial direction of the solenoid valve 100, the static iron core 20 can drive the moving iron core 50 to move relative to the iron core cover 40, and the moving iron core 50 can then drive the valve core assembly 60 to open or close the valve port of the solenoid valve 100.

[0066] In the embodiment of the present application, the moving iron core 50 is made of magnetic conductive material and has a rotating body structure.

[0067] In the embodiment of the present application, the movable iron core 50 is disposed within the iron core cover 40, and a buffer member 41 is provided between the iron core cover 40 and the movable iron core 50. The buffer member 41 is elastic and is located between the iron core cover 40 and the movable iron core 50 along the axial direction of the solenoid valve 100 to absorb the impact of the movable iron core 50 on the iron core cover 40 when the movable iron core 50 moves toward the iron core cover 40, thereby reducing noise during the opening process of the solenoid valve 100 and improving the user experience.

[0068] In the embodiment of the present application, the solenoid valve 100 further includes a drive rod 51, one end of which is connected to the movable iron core 50. The stationary iron core 20 is provided with a through hole 22, and at least a portion of the drive rod 51 is located in the through hole 22 of the stationary iron core 20. The movable iron core 50 can drive the drive rod 51 to move relative to the valve body 10. When the coil assembly 30 is energized, the movable iron core 50 can move toward the stationary iron core 20, and along the axial direction of the solenoid valve 100, the movable iron core 50 drives the drive rod 51 to move toward the valve body 10.

[0069] In the embodiment of the present application, the through hole 22 includes a first through hole, which is located on the side of the static iron core 20 near the movable iron core 50. The first through hole is a tapered hole. The tapered first through hole in the static iron core 20 is used to cooperate with the movable iron core 50 structure near the side of the static iron core 20 to serve as a limit.

[0070] In the embodiment of the present application, the through hole 22 includes a second through hole, which is located on the side of the static iron core 20 near the valve body 10 and is a waist-shaped hole. The increased inner diameter of the second through hole can even out the deformation of the static iron core 20 during press-fitting, thereby reducing the possibility of damage to the static iron core 20. At the same time, the second through hole and the valve cavity 13 of the valve body 10 allow the flow of working medium, guiding the working medium in the second through hole, thereby reducing pressure drop and / or noise.

[0071] In the embodiment of the present application, a first elastic member 52 is sleeved on the drive rod 51. One end of the first elastic member 52 is fixed to the static iron core 20, and the other end of the first elastic member 52 is fixed to the movable iron core 50 or the drive rod 51. The iron core cover 40 is fixedly connected to the static iron core 20 to form an upper valve chamber, which is provided with the movable iron core 50, the drive rod 51, the first elastic member 52, and the static iron core 20. When the coil assembly 30 is energized, the movable iron core 50 overcomes the elastic force of the first elastic member 52 and drives the drive rod 51 toward the valve body 10, thereby opening the valve port of the solenoid valve 100. When the coil assembly 30 is de-energized, the first elastic member 52 causes the movable iron core 50 to drive the drive rod 51 away from the valve body 10, thereby closing the valve port of the solenoid valve 100. The first elastic member 52 includes, but is not limited to, an elastic diaphragm, a bellows, or a spring. In this embodiment, a metal spring is used, which has high strength and long service life.

[0072] In the embodiment of the present application, the solenoid valve 100 further includes a valve core assembly 60, which is movably connected to the valve body 10. The other end of the drive rod 51 can cooperate with the valve core assembly 60, and the movable iron core 50 can drive the valve core assembly 60 to move axially along the solenoid valve 100. When the movable iron core 50 drives the drive rod 51 to move downwardly along the axial direction of the solenoid valve 100, the drive rod 51 can push the valve core assembly 60, thereby closing the valve port of the solenoid valve 100.

[0073] In the examples of this application, refer to Figure 6 and Figure 7 As shown, the valve body 10 includes: a valve body 11, a protrusion 21 fixedly connected to the valve body 11; a valve seat 12, the valve seat 12 is provided with a first channel 121 and a second channel 122, and a valve core assembly 60 is arranged in a valve cavity 13 formed by the valve body 11 and the valve seat 12, for connecting or disconnecting the first channel 121 and the second channel 122, thereby realizing the connection or disconnection of the first channel 121 and the second channel 122 by controlling the position of the valve core assembly 60.

[0074] In the embodiment of the present application, the bottom outer side surface of the valve body 11 is provided with a threaded structure for connecting to the valve seat 12, and the upper inner side surface of the valve seat 12 is provided with a threaded structure for connecting to the valve body 11. The valve body 11 and the valve seat 12 can be connected by threaded fit to form a valve cavity 13, so that after an abnormality occurs in the valve core assembly 60 in the valve cavity 13, it can be quickly disassembled and repaired, thereby improving maintenance efficiency and reducing costs. Among them, the bottom of the thread of the valve body 11 has a clearance guide fitting position that is clearance-fitted with the valve seat 12 to prevent the assembly position between the valve body 11 and the valve seat 12 from deviating significantly due to a void when locking the thread, which may lead to sealing difficulties and sealing failure of the valve body 11.

[0075] In the embodiment of the present application, the valve seat 12 includes a side wall 123 and a bottom wall 124. The side wall 123 is connected to the valve body 11, and the valve core assembly 60 can cooperate with the bottom wall 124. The side wall 123 of the valve seat 12 is provided with at least one first channel 121. The first channel 121 is a hollow structure from the side to the bottom of the side wall 122. The first channel 121 is connected to the valve cavity 13. A second channel 122 is provided in the middle position of the valve seat 12. The second channel 122 is connected to the valve cavity 13. The valve seat 12 has at least one valve port, each valve port is connected to the first channel 121, wherein a part of each valve port is located on the side wall 123, and the other part of each valve port is located on the bottom wall 124. Thus, the opening connected to the first channel 121 extends from the side wall 123 of the valve seat 12 to the bottom wall 124, thereby increasing the flow area and shortening the height of the valve seat 12, thereby reducing the overall height of the solenoid valve 100, reducing costs, and meeting the design requirements of lightweight and miniaturization.

[0076] In the embodiment of the present application, the valve seat 12 is a cylindrical rotating body structure. The valve seat 12 is the supporting base of the solenoid valve 100. Its material includes but is not limited to rubber, plastic, metal or ceramic. This embodiment uses aluminum alloy 6061.

[0077] In the embodiment of the present application, the valve body 11 can be made of SUS304 or other metal materials, which is beneficial to improving the structural strength of the valve body 11 and enabling the valve body 11 to carry a larger size of the static iron core 20. Optionally, the valve body 11 is a cylindrical rotating body structure.

[0078] In this embodiment of the present application, a second elastic member 61 is disposed between the valve core assembly 60 and the valve seat 12. The first elastic member 52 is an upper spring, disposed between the stationary iron core 20 and the movable iron core 50 or the drive rod 51, providing the valve-closing force for the movable iron core 50. The second elastic member 61 is a lower spring, disposed between the valve core assembly 60 and the valve seat 12, providing the valve-opening force for the movable iron core 50. The elastic force of the first elastic member 52 is greater than the elastic force of the second elastic member 61. When the coil assembly 30 is energized, the movable iron core 50 overcomes the elastic force of the first elastic member 52 and, with the assistance of the elastic force of the second elastic member 61, drives the drive rod 51 toward the valve body 10, thereby opening the valve port of the solenoid valve 100. When the coil assembly 30 is de-energized, the first elastic member 52 causes the movable iron core 50 to drive the drive rod 51 away from the valve body 10, thereby closing the valve port of the solenoid valve 100. The second elastic member 61 includes but is not limited to an elastic diaphragm, a bellows or a spring. In this embodiment, a metal spring is used, which has high strength and long service life.

[0079] In the embodiment of the present application, the solenoid valve 100 further includes a fixing member 70, which is disposed on the outer periphery of the valve body 11 and is adapted to be connected to the mounting body 400. The fixing member 70 can be connected to the mounting body 400 by threaded engagement, or can be connected by fasteners, bonding, or other means. The fixing member can be pressed against the valve body 11 to securely mount the valve body 11.

[0080] In the embodiment of the present application, the fixing member 70 is made of aluminum alloy 6061, and the fixing member 70 is a rotating body structure. The upper end of the fixing member 70 has a hexagonal structure, and a threaded structure is provided on the outside for threaded connection with the installation body 400.

[0081] In the embodiment of the present application, a locking washer 71 is provided between the fixing member 70 and the valve body 11. The locking washer 71 is disposed in the mounting groove of the fixing member 70 or the mounting groove of the valve body 11. The fixing member 70 and the valve body 11 are engaged via the locking washer 71, and the fixing member 70 is connected to the mounting body 400 via threads. The locking washer 71 contacts the fixing member 70 and the valve body 11, thereby preventing loosening between the fixing member 70 and the valve body 11, thereby improving the stability of the solenoid valve 100 when mounted on the mounting body 400. Optionally, the locking washer 71 is annular and can be pre-installed in the mounting groove (e.g., a T-slot) of the fixing member 70 or the mounting groove (e.g., a T-slot) of the valve body 11.

[0082] In the embodiment of the present application, the anti-loosening pad 71 is made of EPDM (Ethylene Propylene Diene Monomer), and the anti-loosening pad 71 is a rotating body structure.

[0083] In the embodiment of the present application, at least a portion of the mating surface between the fixing member 70 and the valve body 11 is an inclined surface, which is used to contact the anti-loosening washer 71. The upper end of the mating surface between the fixing member 70 and the valve body 11 is an inclined surface, which is used to contact the anti-loosening washer 71 to prevent the threaded lock of the fixing member 70 from loosening.

[0084] In this embodiment of the present application, the solenoid valve 100 further includes: a first seal 81, which is sealedly connected to the exterior of the valve body 11; and / or a second seal 82, which is sealedly connected to the exterior of the valve seat 12. The first seal 81 is an external leakage seal ring, sealingly installed between the valve body 11 and the mounting body 400 to prevent liquid leakage from the valve body 11; the second seal 82 is an internal leakage seal ring, sealingly installed between the valve seat 12 and the mounting body 400 to prevent liquid leakage from the valve seat 12, thereby isolating the first channel 121 from the second channel 122. Optionally, the first seal 81 is a return body structure, and the second seal 82 is a return body structure.

[0085] In the embodiment of the present application, when the solenoid valve 100 is assembled, the valve body 11 and the static iron core 20 are assembled and welded. Here, the welding method from the outside to the inside is adopted. The welding method from the outside to the inside is defined as: the laser welding point is located at the junction of the first step surface 21a of the protrusion 21 and the first inner wall 11a of the valve body 11. Specifically, Figure 5 The welding process of the static iron core 20 of the solenoid valve 100 of the present application is described in detail:

[0086] 1) The centerline of the static core 20 and the centerline of the core cover 40 are substantially aligned. The core cover 40 is sleeved over the upper end of the static core 20, and the static core 20 and the core cover 40 are assembled into a single unit by press-fitting. After the static core 20 and the core cover 40 are assembled, the core cover 40 and the static core 20 are secured by welding. In this embodiment, the core cover 40 and the static core 20 are secured by laser welding, which improves the connection strength between the static core 20 and the core cover 40 and reduces damage to the magnetic properties of the core cover 40 and the static core 20.

[0087] 2) The center lines of the static iron core 20 and the valve body 11 are substantially aligned, and the raised portion 21 of the static iron core 20 is fixed to the valve body 11 by press-fitting. Along the axial direction of the solenoid valve 100, the raised portion 21 of the static iron core 20 contacts the first inner wall 11a, the second inner wall 11b, and the third inner wall 11c of the valve body 11;

[0088] 3) Install the laser welding head of the welding tool above the valve body 11, and align the laser welding head 8 with a certain point at the junction of the first step surface 21a of the protrusion 21 and the first inner wall 11a of the valve body 11. This point is the starting welding point. It should be pointed out here that for the position of the welding point, the weld formed after welding is required not to hinder the installation of the coil assembly 30. The starting welding point can be located at a position where the protrusion 21 is relatively close to the coil assembly 30 along the radial direction of the solenoid valve 100. Specifically, the center line of the laser lens forms a certain angle β with the center line of the valve body 11, and the extension line of the center line of the laser lens falls on the contact point between the first step surface 21a of the protrusion 21 and the first inner wall 11a of the valve body 11. Based on the requirements of the welding process, in order to reduce the thickness of the molten metal layer of laser welding, make the heat distribution uniform, and have more reliable welding strength, 0°<β<45° is satisfied.

[0089] 4) Start welding, adjust the laser power, and output energy from the laser power supply. The laser welding head is in a relatively static state and is stationary relative to the solenoid valve 100. The fixture is connected to the motor, which can drive the fixture to rotate circumferentially. The combined structure of the valve body 11 and the static iron core 20 is fixed to the fixture. When the laser outputs power, the fixture drives the combined structure of the valve body 11 and the static iron core 20 to rotate along the centerline of the valve body 11. While the laser is outputting, the protrusion 21 is welded to the valve body 11. After the combined structure of the valve body 11 and the static iron core 20 rotates more than one circle, the valve body 11 and the protrusion 21 are tightly connected to form a ring-shaped weld, and the welding is completed. In this embodiment, the angle δ of the combined structure of the valve body 11 and the static iron core 20 satisfies 400°<δ<430°. In the initial stage of laser welding, the output energy of the laser power supply does not reach the given amount. Welding with a rotation angle of 360° has the problem of unreliable end-to-end welding of the circular weld. In order to achieve a sealing connection effect for the annular weld, the rotation angle of the combined structure of the valve body 11 and the static iron core 20 needs to satisfy a given angle range δ.

[0090] According to the heat pump system 200 of the second embodiment of the present application, the heat pump system 200 includes the above-mentioned solenoid valve 100 and a mounting body 400, and the solenoid valve 100 is mounted on the mounting body 400. Optionally, the heat pump system 200 is an air conditioner or a heat pump.

[0091] According to the heat pump system 200 of the embodiment of the present application, by adopting the above-mentioned solenoid valve 100, the protrusion 21 of the static iron core 20 can increase the contact surface of the coil assembly 30, so that the electromagnetic force can pass better. The coil assembly 30 can be appropriately reduced, and the performance of the solenoid valve 100 is stronger at the same volume. The minimum starting voltage for opening the solenoid valve 100 can be reduced, and the energy consumption of the solenoid valve 100 can be reduced, thereby improving the overall performance of the heat pump system 200.

[0092] According to the vehicle 300 of the third embodiment of the present application, Figure 8 As shown, a vehicle 300 includes the aforementioned solenoid valve 100 , or the aforementioned heat pump system 200 .

[0093] According to the vehicle 300 of the embodiment of the present application, by adopting the above-mentioned solenoid valve 100, the protrusion 21 of the static iron core 20 can increase the contact surface of the coil assembly 30, so that the electromagnetic force can pass better. The coil assembly 30 can be appropriately reduced, and the performance of the solenoid valve 100 is stronger at the same volume. The minimum starting voltage for opening the solenoid valve 100 can be reduced, and the energy consumption of the solenoid valve 100 can be reduced, thereby improving the overall performance of the vehicle 300.

[0094] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0095] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0096] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A solenoid valve (100), characterized in that: include: Valve body (10); a static iron core (20), the static iron core (20) having a protrusion (21), the protrusion (21) being fixedly connected to the valve body (10); A coil assembly (30), at least part of which is located on the outer periphery of the static iron core (20), and the coil assembly (30) is in axial contact with the protrusion (21) or is arranged along an axial gap.

2. The solenoid valve (100) according to claim 1, characterized in that The protrusion (21) includes: a first step surface (21a), the first step surface (21a) extends radially and is in axial contact with the coil assembly (30) or is provided with an axial gap; A first step side wall (21b), the first step side wall (21b) is connected to the first step surface (21a), and the first step side wall (21b) is fixedly connected to the first inner wall (11a) of the valve body (10).

3. The solenoid valve (100) according to claim 2, characterized in that The raised portion (21) further includes a second step surface (21c), the second step surface (21c) is connected to the first step side wall (21b), and the second step surface (21c) is fixedly connected to the second inner wall (11b) of the valve body (10).

4. The solenoid valve (100) according to claim 3, characterized in that The raised portion (21) further includes a second step side wall (21d), the second step side wall (21d) is connected to the second step surface (21c), and the second step side wall (21d) is fixedly connected to the third inner wall (11c) of the valve body (10).

5. The solenoid valve (100) according to claim 3, characterized in that The radial dimension of the second step surface (21c) is greater than the radial dimension of the first step surface (21a).

6. The solenoid valve (100) according to any one of claims 2 to 5, characterized in that: The coil assembly (30) comprises a coil (31) and a magnetic conductive member (32), wherein the coil (31) is arranged on the magnetic conductive member (32), and the magnetic conductive member (32) is in axial contact with the first step surface (21a) or is arranged along an axial gap.

7. The solenoid valve (100) according to claim 1, characterized in that The static iron core (20) is made of 00Cr18Si2Mo2, 00Cr13Si2 or other magnetic conductive materials.

8. The solenoid valve (100) according to claim 1, characterized in that The raised portion (21) is interference-fitted with the valve body (10), and / or the raised portion (21) is fixed to the valve body (10) by welding.

9. The solenoid valve (100) according to claim 1, characterized in that The solenoid valve (100) further comprises: an iron core cover (40), wherein the iron core cover (40) is fixedly connected to the static iron core (20), and the coil assembly (30) is sleeved on the outer periphery of the iron core cover (40).

10. The solenoid valve (100) according to claim 9, characterized in that The solenoid valve (100) further includes: a moving iron core (50), at least a portion of which is disposed within the iron core cover (40), the moving iron core (50) being mounted on an end of the iron core cover (40) away from the valve body (10), and the static iron core (20) being capable of driving the moving iron core (50) to move relative to the iron core cover (40).

11. The solenoid valve (100) according to claim 10, characterized in that The moving iron core (50) is arranged in the iron core cover (40), and a buffer member (41) is provided between the iron core cover (40) and the moving iron core (50).

12. The solenoid valve (100) according to claim 10, characterized in that The solenoid valve (100) further includes: a driving rod (51), one end of the driving rod (51) is connected to the moving iron core (50), the static iron core (20) is provided with a through hole (22), at least a portion of the driving rod (51) is located in the through hole (22) of the static iron core (20), and the moving iron core (50) can drive the driving rod (51) to move relative to the valve body (10).

13. The solenoid valve (100) according to claim 12, characterized in that The through hole (22) comprises a first through hole, the first through hole is located on a side of the static iron core (20) close to the moving iron core (50), and the first through hole is a tapered hole.

14. The solenoid valve (100) according to claim 12, characterized in that The through hole (22) includes a second through hole, the second through hole is located on a side of the static iron core (20) close to the valve body (10), and the second through hole is a waist-shaped hole.

15. The solenoid valve (100) according to claim 12, characterized in that A first elastic member (52) is sleeved on the driving rod (51), one end of the first elastic member (52) is fixed to the static iron core (20), and the other end of the first elastic member (52) is fixed to the moving iron core (50) or the driving rod (51).

16. The solenoid valve (100) according to claim 12, characterized in that The solenoid valve (100) further includes: a valve core assembly (60), wherein the valve core assembly (60) is movably connected to the valve body (10), the other end of the driving rod (51) can cooperate with the valve core assembly (60), and the moving iron core (50) can drive the valve core assembly (60) to move along the axial direction of the solenoid valve (100).

17. The solenoid valve (100) according to claim 16, characterized in that The valve body (10) comprises: a valve body (11), the protrusion (21) being fixedly connected to the valve body (11); A valve seat (12), wherein the valve seat (12) is provided with a first channel (121) and a second channel (122); the valve core assembly (60) is arranged in a valve cavity (13) formed by the valve body (11) and the valve seat (12), and is used to connect or disconnect the first channel (121) and the second channel (122).

18. The solenoid valve (100) according to claim 17, characterized in that The valve body (11) is made of SUS304 or other metal materials.

19. The solenoid valve (100) according to claim 17, characterized in that A second elastic member (61) is provided between the valve core assembly (60) and the valve seat (12).

20. The solenoid valve (100) according to claim 17, characterized in that The solenoid valve (100) further comprises a fixing member (70), wherein the fixing member (70) is arranged on the outer periphery of the valve body (11) and is suitable for being connected to the mounting body (400).

21. The solenoid valve (100) according to claim 20, characterized in that An anti-loosening washer (71) is provided between the fixing member (70) and the valve body (11), and the anti-loosening washer (71) is arranged in the installation groove of the fixing member (70) or the installation groove of the valve body (11).

22. The solenoid valve (100) according to claim 21, characterized in that At least a portion of the matching surface between the fixing member (70) and the valve body (11) is an inclined surface, and the inclined surface is used to contact the anti-loosening washer.

23. The solenoid valve (100) according to claim 17, characterized in that The solenoid valve (100) further comprises: a first sealing member (81), the first sealing member (81) being sealingly connected to the exterior of the valve body (11); and / or, a second sealing member (82), wherein the second sealing member (82) is sealingly connected to the outside of the valve seat (12).

24. A heat pump system (200), characterized in that: It comprises the solenoid valve (100) according to any one of claims 1 to 23 and a mounting body (400), wherein the solenoid valve (100) is mounted on the mounting body (400).

25. A vehicle (300), characterized in that The invention comprises the solenoid valve (100) according to any one of claims 1 to 23, or the heat pump system (200) according to claim 24.

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