Solenoid valve, refrigeration device, and automobile

Abstract

The application discloses an electromagnetic valve, a refrigeration device and a car, and the electromagnetic valve comprises a valve body, a static iron core, a dynamic iron core and an elastic isolation ring, the valve body has a containing cavity, the static iron core is arranged in the containing cavity, the dynamic iron core is arranged in the containing cavity and can reciprocate along the axial direction of the valve body, the elastic isolation ring is arranged on one end of the static iron core towards the dynamic iron core, so that the elastic isolation ring is abutted between the static iron core and the dynamic iron core when the static iron core and the dynamic iron core are attracted, the elastic isolation ring is provided with a notch, and the elastic isolation ring is in elastic abutment with the valve body. The technical scheme can reduce the assembly difficulty of the isolation ring and ensure the installation strength of the isolation ring.

Description

Technical Field

[0001] This invention relates to the field of fluid control components, and particularly to a solenoid valve, refrigeration equipment, and automobile. Background Technology

[0002] In related technologies, a stationary iron core is installed inside the sleeve of the solenoid valve, and an isolation ring is provided at one end of the stationary iron core. However, the following problems exist: if the radial dimension of the isolation ring is larger than the radial dimension of the sleeve, the process of installing the isolation ring into the sleeve is difficult; if the radial dimension of the isolation ring is smaller than or equal to the radial dimension of the sleeve, the installation strength of the isolation ring is insufficient, and it is easy to fall off from the sleeve, thereby affecting the reliability of the solenoid valve. Summary of the Invention

[0003] The main objective of this invention is to provide a solenoid valve that reduces the assembly difficulty of the isolation ring while ensuring the installation strength of the isolation ring.

[0004] To achieve the above objectives, the solenoid valve proposed in this invention includes a valve body, a stationary iron core, a moving iron core, and an elastic isolation ring. The valve body has a receiving cavity; the stationary iron core is disposed within the receiving cavity; the moving iron core is reciprocally disposed within the receiving cavity along the axial direction of the valve body; the elastic isolation ring is sleeved on one end of the stationary iron core facing the moving iron core, so that when the stationary iron core and the moving iron core are attracted together, the elastic isolation ring abuts against the space between the stationary iron core and the moving iron core; the elastic isolation ring has a notch, and the elastic isolation ring elastically abuts against the valve body.

[0005] Optionally, the peripheral wall of the end of the stationary iron core facing the moving iron core is provided with an annular groove, the elastic isolation ring is provided in the annular groove, and the end face of the elastic isolation ring facing the moving iron core protrudes from the end face of the stationary iron core facing the moving iron core in the direction from the stationary iron core to the moving iron core.

[0006] Optionally, the annular groove has a fixing groove recessed in the radial direction of the valve body on the side wall in the circumferential direction of the valve body, and the elastic isolation ring has an overlapping portion disposed in the fixing groove.

[0007] Optionally, the valve body includes a sleeve extending axially along the valve body, the stationary iron core is fixed inside the sleeve, the moving iron core is reciprocally disposed inside the sleeve, and the outer peripheral wall of the elastic isolation ring elastically abuts against the inner peripheral wall of the sleeve.

[0008] Optionally, the inner peripheral wall of the elastic isolation ring and the annular groove are in clearance fit with the side wall of the valve body in the circumferential direction.

[0009] Optionally, the gap between the inner circumferential wall of the elastic isolation ring and the annular groove on the side wall of the valve body in the circumferential direction is not less than 0.005 mm and not more than 0.1 mm.

[0010] Optionally, the stationary iron core has a protruding extension at one end facing the moving iron core, and the moving iron core has a recessed portion at one end facing the stationary iron core. When the stationary iron core and the moving iron core are attracted together, the extension is inserted into the recessed portion, and a gap is provided between the surface of the extension and the surface of the recess.

[0011] Optionally, the gap between the surface of the inserted portion and the surface of the recess is not less than 0.003 mm and not more than 0.3 mm.

[0012] The present invention also proposes a refrigeration device, wherein the refrigeration device includes the solenoid valve described in any of the above claims.

[0013] The present invention also proposes an automobile that includes the refrigeration equipment described above.

[0014] The technical solution of this invention involves applying an external force to the elastic isolation ring during installation to change the size of the notch, thereby altering the radial dimension of the elastic isolation ring. This allows for a guiding fit between the elastic isolation ring and the inner peripheral wall of the valve body, facilitating the installation of the elastic isolation ring and reducing the assembly difficulty. Once the elastic isolation ring is in place, it elastically returns to its original shape, elastically contacting the inner peripheral wall of the valve body. This increases the friction between the elastic isolation ring and the inner peripheral wall, ensuring the assembly strength of the isolation ring within the valve body and preventing it from detaching. This, in turn, guarantees the reliability of the solenoid valve. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the solenoid valve of the present invention;

[0017] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0018] Figure 3 for Figure 1 Schematic diagram of the structure of the neutral core;

[0019] Figure 4 for Figure 1 A schematic diagram of the structure of the elastic isolation ring.

[0020] Explanation of icon numbers:

[0021] 100 Solenoid valve 22 Fixed slot 10 Valve body 23 Penetration 11 casing 30 Moving iron core 12 valve seat 31 concavity 13 Valve cover 40 Flexible isolation ring 14 valve port 41 gap 20 static iron core 42 Overlap 21 Annular groove 50 elastic element

[0022] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0025] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0026] This invention proposes a solenoid valve 100 for use in a refrigeration system. This refrigeration system can be an air conditioner, freezer, refrigerator, or other refrigeration or heating equipment. The solenoid valve 100 can control the flow rate of the refrigerant medium in the refrigeration system.

[0027] In embodiments of the present invention, such as Figures 1-4As shown, the solenoid valve 100 includes a valve body 10, a stationary iron core 20, a moving iron core 30, and an elastic isolation ring 40. The valve body 10 has a receiving cavity; the stationary iron core 20 is disposed in the receiving cavity; the moving iron core 30 is reciprocally disposed in the receiving cavity along the axial direction of the valve body 10; the elastic isolation ring 40 is sleeved on one end of the stationary iron core 20 facing the moving iron core 30, so that when the stationary iron core 20 and the moving iron core 30 are attracted together, the elastic isolation ring 40 abuts against the stationary iron core 20 and the moving iron core 30. The elastic isolation ring 40 has a notch 41, and the elastic isolation ring 40 elastically abuts against the valve body 10.

[0028] In this embodiment, the receiving cavity of the valve body 10 is used to accommodate the stationary iron core 20, the moving iron core 30, the elastic isolation ring 40, the refrigerant, and other components of the solenoid valve 100. The valve body 10 is provided with a valve port 14 communicating with the receiving cavity, and the solenoid valve 100 controls the flow rate of the refrigerant by controlling the area of ​​the valve port 14. The stationary iron core 20 is fixed to the top of the receiving cavity, and the moving iron core 30 is disposed on the side of the stationary iron core 20 facing the valve port 14. The solenoid valve 100 also includes a coil assembly, which is sleeved on the outer periphery of the valve body 10 to generate electromagnetic force to drive the moving iron core 30 to move axially along the valve body 10.

[0029] In this embodiment, the solenoid valve 100 is normally closed. When the solenoid valve 100 is de-energized, the electromagnetic force generated by the coil assembly disappears, and the moving iron core 30 moves away from the stationary iron core 20 under its own weight and / or external force (such as the elastic force of the elastic element 50) (i.e., reset movement). At this time, the distance between the moving iron core 30 and the stationary iron core 20 gradually increases. When the solenoid valve 100 is energized, the electromagnetic force generated by the coil assembly is an attractive force, and the moving iron core 30 moves towards the stationary iron core 20 under the action of the attractive force. At this time, the distance between the moving iron core 30 and the stationary iron core 20 gradually decreases. Until the moving iron core 30 touches the end face of the elastic isolation ring 40 sleeved on the stationary iron core 20, the movement speed of the moving iron core 30 will slow down. When the moving iron core 30 stops moving (i.e., when the moving iron core 30 and the stationary iron core 20 are attracted), there is a gap between the moving iron core 30 and the stationary iron core 20, or the moving iron core 30 and the stationary iron core 20 are just in contact.

[0030] It is understandable that both the moving iron core 30 and the stationary iron core 20 are made of metal, and direct contact can easily produce a noticeable collision sound. In particular, when multiple solenoid valves 100 are operating simultaneously, the collision sounds will be superimposed, resulting in significant noise. Furthermore, direct collision between the moving iron core 30 and the stationary iron core 20 can easily lead to mutual wear, affecting the service life of the solenoid valve 100. This embodiment addresses this by placing an elastic isolation ring 40 between the moving iron core 30 and the stationary iron core 20 to prevent direct collision between them. This prevents noise generation during solenoid valve 100 operation and avoids mutual wear between the moving iron core 30 and the stationary iron core 20, thereby extending the service life of the solenoid valve 100.

[0031] It should be noted that, compared with the technical solution of the elastic isolation ring 40 being sleeved on the moving iron core 30, this embodiment sleeves the elastic isolation ring 40 on the stationary iron core 20. The elastic isolation ring 40 is statically fixed, which is more stable and makes the solenoid valve 100 more reliable.

[0032] In this embodiment, the elastic isolation ring 40 is made of a non-metallic material, such as rubber or plastic. A notch 41 extends from the outer ring wall of the elastic isolation ring 40 to the outer ring wall of the elastic isolation ring 40, making the elastic isolation ring 40 C-shaped. In its normal state (i.e., when not installed in the valve body 10), the outer diameter of the elastic isolation ring 40 is larger than the radial dimension of the inner circumferential wall of the valve body 10, so that after the elastic isolation ring 40 is installed in the valve body 10, the outer circumferential wall of the elastic isolation ring 40 can elastically abut against the inner circumferential wall of the valve body 10, thereby increasing the frictional force between the elastic isolation ring 40 and the inner circumferential wall of the valve body 10.

[0033] In this embodiment, the assembly process of the elastic isolation ring 40 is to first put the elastic isolation ring 40 onto the stationary iron core 20, and then install the elastic isolation ring 40 with the stationary iron core 20 into the valve body 10.

[0034] The technical solution of this invention, when installing the elastic isolation ring 40, changes the size of the notch 41 by applying an external force to the elastic isolation ring 40, thereby changing the outer diameter of the elastic isolation ring 40. This allows the elastic isolation ring 40 to have a guiding fit with the inner peripheral wall of the valve body 10, facilitating the installation of the elastic isolation ring 40 into the valve body 10 and reducing the assembly difficulty of the elastic isolation ring 40. After the elastic isolation ring 40 is installed in place, it returns to its original shape due to its own elasticity, and the elastic isolation ring 40 elastically abuts against the inner peripheral wall of the valve body 10, increasing the friction between the elastic isolation ring 40 and the inner peripheral wall of the valve body 10. This ensures the assembly and installation strength of the isolation ring within the valve body 10, thereby preventing the elastic isolation ring 40 from falling out of the valve body 10 and ensuring the reliability of the solenoid valve 100.

[0035] In one embodiment, such as Figures 2-3 As shown, the peripheral wall of the end of the stationary iron core 20 facing the moving iron core 30 is provided with an annular groove 21, the elastic isolation ring 40 is provided in the annular groove 21, and the end face of the elastic isolation ring 40 facing the moving iron core 30 protrudes from the end face of the stationary iron core 20 facing the moving iron core 30 in the direction from the stationary iron core 20 to the moving iron core 30.

[0036] In this embodiment, the outer peripheral wall of the stationary iron core 20 is fitted against the inner peripheral wall of the valve body 10. An annular groove 21 is provided on the outer peripheral wall of the end of the stationary iron core 20 facing the moving iron core 30 to provide space for accommodating the elastic isolation ring 40. The end face of the elastic isolation ring 40 facing away from the moving iron core 30 abuts against the side wall of the annular groove 21 in the axial direction of the valve body 10 to support the elastic isolation ring 40 when the moving iron core 30 and the stationary iron core 20 are attracted together, preventing the elastic isolation ring 40 from moving away from the moving iron core 30 and causing the moving iron core 30 and the stationary iron core 20 to collide with each other. In the direction from the stationary iron core 20 to the moving iron core 30, the end face of the elastic isolation ring 40 facing the moving iron core 30 protrudes beyond the end face of the stationary iron core 20 facing the moving iron core 30, so as to ensure that when the moving iron core 30 and the stationary iron core 20 are attracted together, the end face of the elastic isolation ring 40 facing the moving iron core 30 abuts against the moving iron core 30, preventing the moving iron core 30 from directly colliding with the stationary iron core 20.

[0037] In one embodiment, such as Figures 2-4 As shown, the annular groove 21 has a fixing groove 22 recessed in the radial direction of the valve body 10 on the side wall of the valve body 10 in the circumferential direction, and the elastic isolation ring 40 has an overlapping part 42 provided in the fixing groove 22.

[0038] In this embodiment, the overlapping part 42 overlaps with the side wall of the moving iron core 30 on the wall of the fixed groove 22 near the moving iron core 30, so as to improve the connection strength between the elastic isolation ring 40 and the stationary iron core 20, prevent the elastic isolation ring 40 from falling off, and thus ensure the reliability of the solenoid valve 100.

[0039] In one embodiment, such as Figures 1-2 As shown, the valve body 10 includes a sleeve 11 extending axially along the valve body 10, the stationary iron core 20 is fixed inside the sleeve 11, the moving iron core 30 is reciprocally disposed inside the sleeve 11, and the outer peripheral wall of the elastic isolation ring 40 elastically abuts against the inner peripheral wall of the sleeve 11.

[0040] In this embodiment, the valve body 10 further includes a valve seat 12 and a valve cover 13. The valve needle has a valve port 14 and a valve cavity communicating with the valve port 14. The valve cover 13 is installed in the valve cavity and has a mounting hole communicating with the valve cavity. The end of the sleeve 11 facing away from the stationary iron core 20 is inserted into the mounting hole and communicates with the valve cavity. The coil assembly is sleeved on the outer periphery of the sleeve 11. The stationary iron core 20 is fixedly installed on the end of the sleeve 11 facing away from the valve port 14.

[0041] In one embodiment, such as Figure 2 As shown, the inner circumferential wall of the elastic isolation ring 40 and the annular groove 21 are in clearance fit with the side wall of the valve body 10 in the circumferential direction.

[0042] Understandably, before the elastic isolation ring 40 is installed into the sleeve 11, its radial dimension needs to be reduced by external force. If there is no gap between the inner circumferential wall of the elastic isolation ring 40 and the annular groove 21 on the circumferential side wall of the valve body 10, the elastic isolation ring 40 cannot be reduced, making it difficult to install into the sleeve 11. Therefore, a gap needs to be provided between the inner circumferential wall of the elastic isolation ring 40 and the annular groove 21 on the circumferential side wall of the valve body 10 to facilitate the installation of the elastic isolation ring 40 into the sleeve 11.

[0043] In one embodiment, such as Figure 2 As shown, the gap between the inner circumferential wall of the elastic isolation ring 40 and the annular groove 21 on the circumferential side wall of the valve body 10 (e.g.) Figure 2 (As shown in d) is not less than 0.005 mm and not greater than 0.1 mm.

[0044] Understandably, if the gap between the inner circumferential wall of the elastic isolation ring 40 and the annular groove 21 on the circumferential side wall of the valve body 10 is less than 0.005 mm, the space between them is too narrow, preventing the elastic isolation ring 40 from effectively reducing its radial dimension and making installation difficult. Conversely, if the gap is greater than 0.1 mm, the contact area between the overlapping portion 42 and the fixing groove 22 decreases, making the overlapping portion 42 easily detach from the fixing groove 22, thus causing the elastic isolation ring 40 to fall off. Therefore, when the gap between the inner circumferential wall of the elastic isolation ring 40 and the annular groove 21 on the circumferential side wall of the valve body 10 is between 0.005 mm and 0.1 mm, it facilitates the insertion of the elastic isolation ring 40 into the sleeve 11 and ensures that the elastic isolation ring 40 is not easily detached. The gap between the inner circumferential wall of the elastic isolation ring 40 and the annular groove 21 on the circumferential side wall of the valve body 10 is, for example, but not limited to, 0.005 mm, 0.05 mm, 0.1 mm, etc.

[0045] In one embodiment, such as Figure 1As shown, the stationary iron core 20 has a protruding extension 23 at one end facing the moving iron core 30, and the moving iron core 30 has a recessed portion 31 at one end facing the stationary iron core 20. When the stationary iron core 20 and the moving iron core 30 are attracted together, the extension 23 is inserted into the recessed portion 31, and there is a gap between the surface of the extension 23 and the surface of the recessed portion 31.

[0046] In this embodiment, when the moving iron core 30 and the stationary iron core 20 move relative to each other, the extension part 23 gradually inserts into the recess 31. In this embodiment, the area of ​​the opposite end faces between the stationary iron core 20 and the moving iron core 30 is increased by the cooperation of the extension part 23 and the recess 31, so as to increase the magnetic flux area when the stationary iron core 20 and the moving iron core 30 are energized, providing a larger electromagnetic force for the movement of the moving iron core 30, thereby enabling the solenoid valve 100 to start under a smaller voltage.

[0047] It is understandable that when the stationary iron core 20 and the moving iron core 30 are attracted together, the surface of the protruding part 23 and the surface of the recess 31 are spaced apart, which can prevent the protruding part 23 from colliding with the recess 31 and generating noise, and also prevent the protruding part 23 from colliding with the recess 31 and causing wear.

[0048] In one embodiment, such as Figure 1 As shown, the gap between the surface of the protruding part 23 and the surface of the recess 31 is not less than 0.003 mm and not greater than 0.3 mm.

[0049] Understandably, if the gap between the surface of the protrusion 23 and the surface of the recess 31 is less than 0.003 mm, the surfaces of the protrusion 23 and the recess 31 are prone to collision when the moving iron core 30 and the stationary iron core 20 are attracted together. If the gap between the surfaces of the protrusion 23 and the recess 31 is greater than 0.3 mm, the axial length of the solenoid valve 100 will be too large, which is not conducive to the miniaturization of the solenoid valve 100. Therefore, when the gap between the surface of the protrusion 23 and the surface of the recess 31 is between 0.003 mm and 0.3 mm, collision between the protrusion 23 and the recess 31 can be avoided, and it is beneficial to reduce the size of the solenoid valve 100. The gap between the surface of the protrusion 23 and the surface of the recess 31 is, for example, but not limited to, 0.003 mm, 0.03 mm, 0.3 mm, etc.

[0050] The present invention also proposes a refrigeration device, which includes a solenoid valve 100. The specific structure of the solenoid valve 100 is as described in the above embodiments. Since the refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0051] The present invention also proposes an automobile, which includes a refrigeration device. The specific structure of the refrigeration device is as described in the above embodiments. Since the automobile adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0052] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A solenoid valve, characterized in that, include: The valve body has a receiving cavity; A stationary iron core is disposed within the receiving cavity; A movable iron core is reciprocally disposed within the receiving cavity along the axial direction of the valve body; and, An elastic isolation ring is sleeved on the end of the stationary iron core facing the moving iron core, so that when the stationary iron core and the moving iron core are attracted together, the elastic isolation ring abuts against the space between the stationary iron core and the moving iron core. The elastic isolation ring has a notch and elastically abuts against the valve body. The stationary iron core has an annular groove on the peripheral wall of the end facing the moving iron core. The elastic isolation ring is disposed in the annular groove. The end face of the elastic isolation ring facing the moving iron core protrudes from the end face of the stationary iron core facing the moving iron core in the direction from the stationary iron core to the moving iron core. The inner peripheral wall of the elastic isolation ring and the annular groove are in clearance fit with the side wall of the valve body in the circumferential direction. The annular groove is recessed into the side wall of the valve body in the circumferential direction along the radial direction of the valve body, and the elastic isolation ring has an overlapping part provided in the fixed groove.

2. The solenoid valve as described in claim 1, characterized in that, The valve body includes a sleeve extending along the axial direction of the valve body, the stationary iron core is fixed inside the sleeve, the moving iron core is reciprocally disposed inside the sleeve, and the outer peripheral wall of the elastic isolation ring elastically abuts against the inner peripheral wall of the sleeve.

3. The solenoid valve as described in claim 1, characterized in that, The gap between the inner circumferential wall of the elastic isolation ring and the annular groove on the side wall of the valve body in the circumferential direction is not less than 0.005 mm and not more than 0.1 mm.

4. The solenoid valve as described in claim 1, characterized in that, The stationary iron core has a protruding extension at one end facing the moving iron core, and the moving iron core has a recessed portion at one end facing the stationary iron core. When the stationary iron core and the moving iron core are attracted together, the extension is inserted into the recessed portion, and there is a gap between the surface of the extension and the surface of the recess.

5. The solenoid valve as described in claim 4, characterized in that, The gap between the surface of the protruding part and the surface of the recessed part shall be no less than 0.003 mm and no more than 0.3 mm.

6. A refrigeration device, characterized in that, Including the solenoid valve as described in any one of claims 1-5.

7. A car, characterized in that, Includes the refrigeration equipment as described in claim 6.

Images