Electromagnetic valve, refrigeration equipment and automobile

Abstract

The electromagnetic valve comprises a movable iron core part and a piston part, the movable iron core part comprises a valve needle, the valve needle is provided with a tip end, the angle of the tip end is theta 1, the piston part comprises a first sealing plug, the first sealing plug is provided with an inner hole, the tip end is suitable for being inserted into the inner hole to be sealed, and the opening angle of the inner hole is theta 2; theta 1 > Theta 2 is satisfied. By improving the angle of the tip end of the valve needle and the opening angle of the inner hole of the first sealing plug, the matching degree of the tip end of the valve needle and the inner hole of the first sealing plug is improved, so that the sealing performance is improved, and the inner leakage risk of the electromagnetic valve is reduced; the motion trails of the valve needle and the piston component are more accurate, the reliability of the electromagnetic valve is improved, and the sealing performance is further ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control components, and in particular to a solenoid valve, a refrigeration device and a car. Background Art

[0002] With the increasing use of automobiles, temperature regulation has become a basic feature to create a more comfortable driving environment. Solenoid valves are often installed in refrigeration system pipelines to control the flow of media within the system. Currently, major manufacturers are focusing on the sealing performance of solenoid valves, with extremely high internal leakage requirements. Summary of the Invention

[0003] The present application aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the present application proposes a solenoid valve.

[0004] To achieve the above objectives, the present application discloses a solenoid valve, comprising:

[0005] a movable iron core component, the movable iron core component including a valve needle, the valve needle having a tip, the angle of the tip being θ1; and

[0006] The piston component comprises a first sealing plug having an inner hole, the tip being adapted to be inserted into the inner hole for sealing, and an opening angle of the inner hole being θ2, satisfying θ1>θ2.

[0007] In some embodiments of the present application, the first sealing plug has a first sealing surface surrounding the inner hole, the first sealing surface is a chamfered inclined surface, and the gradually expanding angle of the first sealing surface constitutes the opening angle of the inner hole.

[0008] In some embodiments of the present application, the movable iron core component further includes a movable iron core body, the movable iron core body is provided with a first guide hole, and the valve needle is mounted on the movable iron core component and passes through the first guide hole;

[0009] The solenoid valve further comprises a static iron core component, the static iron core component is provided with a second guide hole, and the valve needle also passes through the second guide hole;

[0010] The valve needle is movable axially relative to the first guide hole and the second guide hole, and the fitting length L1 of the first guide hole and the valve needle along the axial direction is greater than 1.5 mm, and the fitting length L2 of the second guide hole and the valve needle along the axial direction is greater than 1.5 mm.

[0011] In some embodiments of the present application, L1>L2 is satisfied.

[0012] In some embodiments of the present application, the movable iron core component further includes a movable iron core body, the movable iron core body is provided with a first guide hole, the valve needle is mounted on the movable iron core component and passes through the first guide hole, a first fitting gap is provided between the valve needle and the hole wall of the first guide hole, and the size of the first fitting gap is A;

[0013] The solenoid valve further includes a static iron core component, the static iron core component is provided with a second guide hole, the valve needle also passes through the second guide hole, a second fitting gap is provided between the valve needle and the hole wall of the second guide hole, and the size of the second fitting gap is B;

[0014] Satisfies B>A.

[0015] In some embodiments of the present application, the solenoid valve is provided with a valve cavity, the piston component is movably provided in the valve cavity, a third fitting gap is provided between the piston component and the cavity wall of the valve cavity, and the size of the third fitting gap is C, satisfying B>A>C.

[0016] In some embodiments of the present application, the solenoid valve is provided with a valve cavity, and the piston component is movably provided in the valve cavity;

[0017] The piston component includes a first piston portion and a second piston portion, the first piston portion is provided on the second piston portion and is axially upwardly protruding relative to the second piston portion, and the center of gravity of the piston component is not higher than half of the axial height of the piston component;

[0018] The fitting length between the first piston portion and the cavity wall of the valve cavity along the axial direction is L3, and the fitting length between the second piston portion and the cavity wall of the valve cavity along the axial direction is L4, satisfying L4>L3.

[0019] In some embodiments of the present application, the valve needle is made of aluminum alloy.

[0020] A second aspect of the present application discloses a refrigeration device, which includes the above-mentioned solenoid valve.

[0021] A third aspect of the present application discloses a car, which includes the above-mentioned refrigeration device.

[0022] The technical solution of the present application improves the angle of the tip of the valve needle and the opening angle of the inner hole of the first sealing plug, which is beneficial to improving the fit between the tip of the valve needle and the inner hole of the first sealing plug, thereby improving the sealing performance and reducing the risk of internal leakage of the solenoid valve. In addition, through the optimization of the fitting clearance, fitting length, etc., the movement trajectory of the valve needle and the piston component is made more precise, which is beneficial to improving the reliability of the solenoid valve and further ensuring the sealing performance.

[0023] Other advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other designs can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] Figure 1 is a cross-sectional view of a solenoid valve in some embodiments;

[0026] Figure 2 for Figure 1 A partial schematic diagram of the structure shown;

[0027] Figure 3 for Figure 2 The enlarged view marked as Ⅰ in the figure;

[0028] Figure 4 for Figure 2 The enlarged view marked as Ⅱ in the figure;

[0029] Figure 5 for Figure 2 The enlarged view marked as III in the figure;

[0030] Figure 6 for Figure 2 The enlarged view marked as IV in the figure;

[0031] Figure 7 Schematic diagram of a moving iron core component, a stationary iron core component, and a valve cover in some embodiments;

[0032] Figure 8 Schematic diagram of a moving iron core component in some embodiments;

[0033] Figure 9 for Figure 8 The enlarged image marked as V in the figure;

[0034] Figure 10 Schematic diagram of a piston in some embodiments;

[0035] Figure 11 for Figure 10 The enlarged view marked as VI in the figure;

[0036] Figure 12 Schematic diagram of refrigeration equipment in some embodiments;

[0037] Figure 13 Schematic diagram of a car in some embodiments.

[0038] Description of Figure Numbers:

[0039] Solenoid valve 100, refrigeration equipment 200, automobile 300, valve cover 1000, first valve chamber 1100, chamber wall 1101 of first valve chamber, upper valve chamber 1110, chamber wall 1111 of upper valve chamber, lower valve chamber 1120, chamber wall 1121 of lower valve chamber, valve seat 2000, second valve chamber 2100, first flow port 2200, valve port 2300, piston component 3000, first piston portion 3001, second piston portion 3002, first sealing plug 3100, first sealing surface 3101, inner hole 3110, through hole Through hole 3200, guide valve port 3210, opening 3220, balancing hole 3300, second sealing plug 3400, housing 4000, moving iron core component 5000, moving iron core body 5100, first guide hole 5110, hole wall 5111 of first guide hole, valve needle 5200, tip 5210, spring 5300, static iron core component 6000, second guide hole 6110, hole wall 6111 of second guide hole, first fitting gap 7001, second fitting gap 7002, third fitting gap 7003.

[0040] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0045] In the related art, the solenoid valve 100 is sealed by inserting the valve needle 5200 into the first sealing plug 3100. However, the solenoid valve 100 in the related art has the problem of internal leakage. Therefore, the present application proposes an improvement on this.

[0046] Combine Figure 1 、 Figure 2 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11 As shown, in some embodiments of the present application, the solenoid valve 100 includes a moving iron core component 5000 and a piston component 3000, the moving iron core component 5000 includes a valve needle 5200, and the piston component 3000 includes a first sealing plug 3100, wherein the valve needle 5200 has a tip 5210, and the angle of the tip 5210 is designed to be θ1, the first sealing plug 3100 has an inner hole 3110, and the opening angle of the inner hole 3110 is designed to be θ2, and the condition θ1>θ2 needs to be satisfied, and the valve needle 5200 is inserted into the inner hole 3110 through the tip 5210 to seal the inner hole 3110. By improving the angle of the tip 5210 of the valve needle 5200 and the opening angle of the inner hole 3110 of the first sealing plug 3100, it is beneficial to improve the fit between the tip 5210 of the valve needle 5200 and the inner hole 3110 of the first sealing plug 3100, and avoid the tip 5210 of the valve needle 5200 being inserted into the inner hole 3110 of the first sealing plug 3100 for too long, which is beneficial to improving the sealing performance and reducing the risk of internal leakage of the solenoid valve 100.

[0047] Specifically, the basic structure of the solenoid valve 100 is as follows: the solenoid valve 100 includes a valve cover 1000, a valve seat 2000, a piston component 3000, a housing 4000, a movable iron core component 5000, and a stationary iron core component 6000. The valve seat 2000 can be manufactured through an integral molding process or assembled through a split structure. The material of the valve seat 2000 can be metal or non-metal. The valve cover 1000 and the valve seat 2000 are installed together to enclose a valve cavity. The valve seat 2000 is provided with a first flow port 2200 and a valve port 2300. The first flow port 2200 is provided on the wall of the valve seat 2000 and is connected to the valve cavity. The valve port 2300 is located approximately in the lower center of the valve seat 2000. The static iron core component 6000 is set on the valve cover 1000. The static iron core component 6000 and the valve cover 1000 can be an integrally formed structure or can be split components connected to each other. In this embodiment, the static iron core component 6000 and the valve cover 1000 are an integral structure, and a coil (not shown in the figure) surrounds the static iron core component 6000. The housing 4000 is connected to the static iron core component 6000, and the moving iron core component 5000 is set inside the housing 4000. The moving iron core component 5000 is away from the valve cavity (relative to the static iron core component 6000). Figure 1 The movable iron core component 5000 is located above the static iron core component 6000 . The static iron core component 6000 is provided with a second guide hole 6110 . The valve needle 5200 of the movable iron core component 5000 passes through the second guide hole 6110 so as to cooperate with the piston component 3000 .

[0048] It is understandable that there are many ways to enclose a valve cavity between the valve cover 1000 and the valve seat 2000. For example, the valve cover 1000 is provided with a first valve cavity 1100, and the valve seat 2000 is provided with a second valve cavity 2100. When the valve cover 1000 is installed on the valve seat 2000, the first valve cavity 1100 and the second valve cavity 2100 are connected to form a valve cavity, and the piston component 3000 is arranged in the valve cavity. In this embodiment, along the radial direction, the piston component 3000 is suitable for abutting against the cavity wall 1101 of the first valve cavity 1100, that is, the piston component 3000 and the first valve cavity 1100 are clearance-matched along the radial direction. When the piston component 3000 is skewed, the piston component 3000 can abut against the cavity wall 1101 of the first valve cavity 1100, and the cavity wall 1101 of the first valve cavity 1100 forms a radial limit for the piston component 3000, thereby ensuring a guiding role for the axial movement of the piston component 3000, so that the piston component 3000 can close and open the valve port 2300 (detailed below). In other embodiments, the piston component 3000 may also be suitable for abutting against the cavity wall of the second valve cavity 2100 along the radial direction, or be suitable for abutting against the cavity wall 1101 of the first valve cavity 1100 and the cavity wall of the second valve cavity 2100 at the same time. Examples are not given one by one here (the radial limitation of the piston component 3000 formed by the cavity wall 1101 of the first valve cavity 1100 is explained below).

[0049] The piston component 3000 is provided with a through hole 3200 and a balancing hole 3300. Along the axial direction, the through hole 3200 penetrates the piston component 3000, and the balancing hole 3300 also penetrates the piston component 3000. The so-called penetration means that the through hole 3200 can connect the two sides of the axial direction of the piston component 3000, and the balancing hole 3300 can also connect the two sides of the axial direction of the piston component 3000. Figure 10 As shown, the balancing hole 3300 is generally located around the piston component 3000, and the through-hole 3200 is generally located in the center of the piston component 3000. The through-hole 3200 is used to connect the first valve cavity 1100 and the valve port 2300, and the balancing hole 3300 is used to connect the second valve cavity 2100 and the first valve cavity 1100. The through-hole 3200 is provided with a pilot valve port 3210 on one side (upper side) of the piston component 3000, and an opening 3220 on the other side (lower side) of the piston component 3000. The piston component 3000 also includes a first sealing plug 3100 and a second sealing plug 3400. The first sealing plug 3100 surrounds the pilot valve port 3210, and the second sealing plug 3400 surrounds the opening 3220.

[0050] The working principle of the solenoid valve 100 is as follows:

[0051] When the solenoid valve 100 is energized, the static iron core component 6000 has magnetic force, the static iron core component 6000 attracts the movable iron core component 5000, and the movable iron core component 5000 moves toward the static iron core component 6000, that is, the movable iron core component 5000 moves toward the direction of the piston component 3000 ( Figure 1 The movable iron core component 5000 moves downward), the movable iron core component 5000 drives the valve needle 5200 to move, and the tip 5210 of the valve needle 5200 is inserted into the inner hole 3110 of the first sealing plug 3100 to seal, thereby closing the pilot valve port 3210. The medium enters the second valve chamber 2100 from the first flow port 2200, and then enters the first valve chamber 1100 through the balancing hole 3300. Since the pilot valve port 3210 is closed, the medium cannot enter the through hole 3200 through the pilot valve port 3210 and then enter the valve port 2300 through the opening 3220 to be discharged from the solenoid valve 100. Therefore, as the medium cannot enter the first valve chamber 1100 and the second valve chamber 2100 until the pressure on both sides of the piston member 3000 is equal, the piston member 3000 moves toward the lower valve port 2300 under the action of the movable iron core member 5000 and gravity, so that the second sealing plug 3400 is in sealing contact with the periphery of the valve port 2300, so that the piston member 3000 closes the valve port 2300 (at this time, the opening 3220 can still communicate with the valve port 2300, but no medium flows from the opening 3220 to the valve port 2300).

[0052] When the solenoid valve 100 is powered off, the magnetic force of the static iron core component 6000 disappears, the static iron core component 6000 releases the movable iron core component 5000, and the movable iron core component 5000 moves away from the static iron core component 6000 and away from the piston component 3000 ( Figure 1 The movable iron core component 5000 moves upward), the movable iron core component 5000 drives the valve needle 5200 to move, and the tip 5210 of the valve needle 5200 separates from the first sealing plug 3100, thereby opening the pilot valve port 3210, and the medium enters the second valve chamber 2100 from the first flow port 2200, and then enters the first valve chamber 1100 through the balancing hole 3300, and then the medium enters the through hole 3200 through the pilot valve port 3210, and finally enters the valve port 2300 through the opening 3220 and is discharged from the solenoid valve 100. The pressure difference generated when the above medium flows causes the piston component 3000 to move toward the static iron core component 6000, and the second sealing plug 3400 and the periphery of the valve port 2300 are separated, so that the piston component 3000 opens the valve port 2300, and the tip 5210 of the valve needle 5200 is inserted into the inner hole 3110 of the first sealing plug 3100.

[0053] It is understood that the above description is merely an exemplary description of the solenoid valve 100 and does not constitute a limitation on the structure of the solenoid valve 100. The solenoid valve 100 described above is a normally open solenoid valve 100. The same is true for normally closed solenoid valves, where the end of the valve needle 5200 also needs to be inserted into the inner hole 3110 of the corresponding sealing plug to achieve sealing.

[0054] In order to improve the sealing performance and reduce the risk of internal leakage of the solenoid valve 100, in this embodiment, the angle of the tip 5210 is designed to be θ1, where the angle of the tip 5210 can be understood as a cross section through the axis of the tip 5210, and the angle of the cross-sectional profile can be regarded as θ1, and the opening angle of the inner hole 3110 of the first sealing plug 3100 is designed to be θ2, where the opening angle of the inner hole 3110 can be understood as the tangent angle of the opening of the inner hole 3110. When θ1 is designed to be larger than θ2, then when the tip 5210 of the valve needle 5200 is inserted into the inner hole 3110, the reduction in sealing performance due to excessive insertion length can be avoided. This is because the sealing performance is affected by the surface processing accuracy of the parts. When the insertion length of the tip 5210 of the valve needle 5200 is too long, the longer the peripheral fitting length between the tip 5210 of the valve needle 5200 and the inner hole 3110 (the length of the contact position between the two, which can also be understood as the fitting area) is, the more unfavorable it is for sealing. In this embodiment, by designing θ1 to be larger than θ2, the fitting length between the tip 5210 of the valve needle 5200 and the periphery of the inner hole 3110 can be shortened, which is beneficial to improving the sealing performance between the valve needle 5200 and the first sealing plug 3100 when they fit together.

[0055] Combine Figure 10 and Figure 11 As shown, in some embodiments of the present application, the first sealing plug 3100 has a first sealing surface 3101, the first sealing surface 3101 surrounds the inner hole 3110, and the first sealing surface 3101 is designed as a chamfered inclined surface. Thus, the first sealing surface 3101 is gradually expanded, as shown in FIG. Figure 1 and Figure 11 In the orientation shown, the first sealing surface 3101 is configured to gradually expand from bottom to top. In other words, the expansion angle of the first sealing surface 3101 defines the opening angle of the inner hole 3110. When the tip 5210 of the valve needle 5200 is inserted into the inner hole 3110, the tip 5210 of the valve needle 5200 abuts against the first sealing surface 3101, thereby forming a contact seal. In this embodiment, by designing the first sealing surface 3101 as a chamfered inclined surface, the first sealing surface 3101 gradually expands from bottom to top, while the tip 5210 of the valve needle 5200 gradually contracts from top to bottom. This ensures a better fit between the tip 5210 of the valve needle 5200 and the first sealing surface 3101, further facilitating a contact seal and improving sealing performance.

[0056] Combine Figure 2 As shown, in some embodiments of the present application, the moving iron core component 5000 includes a moving iron core body 5100, and the moving iron core body 5100 is provided with a first guide hole 5110, and the valve needle 5200 is installed on the moving iron core body 5100 and passes through the first guide hole 5110; while the static iron core component 6000 is provided with a second guide hole 6110, and the valve needle 5200 needs to pass through the second guide hole 6110 on the basis of passing through the first guide hole 5110.

[0057] Specifically, the static iron core component 6000 attracts and releases the moving iron core component 5000 mainly through the moving iron core body 5100, that is, when the static iron core component 6000 is magnetized, the moving iron core body 5100 is attracted to achieve the attraction of the entire moving iron core component 5000, and when the magnetic force of the static iron core component 6000 disappears, the moving iron core body 5100 is released to achieve the release of the entire moving iron core component 5000.

[0058] When the static iron core component 6000 attracts and releases the moving iron core body 5100, the moving iron core body 5100 drives the valve needle 5200 to move axially. At this time, the valve needle 5200 moves axially relative to the second guide hole 6110. The second guide hole 6110 forms a radial limit for the valve needle 5200, thereby guiding the valve needle 5200 to move axially.

[0059] Generally speaking, the moving iron core component 5000 also includes a spring 5300. The spring 5300 is assembled on the moving iron core body 5100 and abuts against the valve needle 5200. The valve needle 5200 is assembled to the moving iron core body 5100 and is movable relative to the first guide hole 5110. When the valve needle 5200 is inserted into the inner hole 3110 of the first sealing plug 3100, the valve needle 5200 moves relative to the first guide hole 5110. The spring 5300 can play a buffering role, reduce impact, and extend the service life of the valve needle 5200 and the first sealing plug 3100. The first guide hole 5110 realizes radial limitation of the valve needle 5200, thereby inducing axial movement of the valve needle 5200.

[0060] Combine Figure 2 、 Figure 3 and Figure 4As shown, to reduce wear between the valve needle 5200 and the first guide hole 5110 and the second guide hole 6110, in this embodiment, the axial mating length between the valve needle 5200 and the first guide hole 5110, as well as the axial mating length between the valve needle 5200 and the second guide hole 6110, is designed to be greater than 1.5 mm. For example, the axial mating length between the valve needle 5200 and the first guide hole 5110 is L1, and the axial mating length between the valve needle 5200 and the second guide hole 6110 is L2. The requirements for L1 > 1.5 mm and L2 > 1.5 mm are as follows: for example, L1 / L2 is 1.5 mm, 2 mm, 3 mm, 4 mm, 5 mm, 7 mm, 8 mm, 10 mm, etc. By optimizing the mating length L1 / L2 to avoid being too short, the valve needle 5200 is less susceptible to wear during axial movement.

[0061] It can be understood that the so-called fitting length, taking the fitting length L1 as an example, is the length of the overlapping part of the valve needle 5200 and the first guide hole 5110 along the axial direction when the two are relatively stationary, or it can be understood as assuming that the valve needle 5200 is in contact with the hole wall 5111 of the first guide hole 5110, and the length of the contact part of the valve needle 5200 and the first guide hole 5110 along the axial direction (the same is true for L2, L3, and L4 in this article, which will not be repeated).

[0062] Furthermore, in some embodiments of the present application, the axial mating length L1 between the valve needle 5200 and the first guide hole 5110 is greater than the axial mating length L2 between the valve needle 5200 and the second guide hole 6110. As mentioned above, the valve needle 5200 is mounted on the movable iron core body 5100 and penetrates the first guide hole 5110. The movable iron core body 5100 drives the valve needle 5200. By designing L1 to be greater than L2, the first guide hole 5110 has a longer length in the axial direction relative to the second guide hole 6110. This radially limits the valve needle 5200, prevents excessive movement of the valve needle 5200 in a direction perpendicular to the axial direction, and ensures smooth mating of the valve needle 5200 with the first sealing plug 3100.

[0063] Combine Figure 2 、 Figure 3 and Figure 4 As shown, in some embodiments of the present application, the valve needle 5200 is clearance-fitted with the first guide hole 5110, and a first fitting gap 7001 is formed between the valve needle 5200 and the hole wall 5111 of the first guide hole 5110, and the valve needle 5200 is also clearance-fitted with the second guide hole 6110, thereby forming a second fitting gap 7002 between the valve needle 5200 and the hole wall 6111 of the second guide hole 6110. The size of the first fitting gap 7001 is defined as A, and the second fitting gap 7002 is defined as B, and the condition B>A needs to be satisfied.

[0064] Specifically, the valve needle 5200 is designed to have a clearance fit with the first guide hole 5110 and the second guide hole 6110, thereby reducing the friction resistance when the valve needle 5200 moves axially relative to the first guide hole 5110 and the second guide hole 6110. In addition, when the valve needle 5200 and / or the piston component 3000 move axially, the valve needle 5200 is inserted into the inner hole 3110 to close the pilot valve port 3210. Due to the clearance fit between the valve needle 5200 and the first guide hole 5110 and the second guide hole 6110, the valve needle 5200 has a displacement perpendicular to the axial direction ( Figure 1 The valve needle 5200 is positioned in the left-right direction (i.e., the valve needle 5200 can move in the left-right direction), thereby preventing the tip 5210 of the valve needle 5200 from being unable to be inserted into the inner hole 3110 due to the misalignment between the valve needle 5200 and the inner hole 3110, thereby ensuring the proper fit between the valve needle 5200 and the first sealing plug 3100. Furthermore, the first fitting gap 7001 is further away from the piston assembly 3000 than the second fitting gap 7002. Therefore, the first fitting gap 7001 has less influence on the left-right displacement of the tip 5210 of the valve needle 5200. Therefore, the size A of the first fitting gap 7001 is designed to be smaller than the size B of the second fitting gap 7002. This also allows the movable iron core body 5100 to better support the valve needle 5200 and prevent excessive movement of the valve needle 5200.

[0065] Combine Figure 2 、 Figure 5 and Figure 6As shown, in some embodiments of the present application, there is a third fitting gap 7003 between the piston component 3000 and the cavity wall of the valve cavity (the third fitting gap 7003 exists between the piston component 3000 and the cavity wall 1101 of the first valve cavity 1100), the size of the third fitting gap 7003 is C, the size B of the second fitting gap 7002 is designed to be larger than the size C of the third fitting gap 7003, and the size A of the first fitting gap 7001 is designed to be larger than the size C of the third fitting gap 7003, that is, B>A>C. Since there is a third fitting gap 7003 between the piston component 3000 and the cavity wall 1101 of the first valve cavity 1100, when the piston component 3000 moves axially, the piston component 3000 has a displacement perpendicular to the axial direction. By designing the size B of the second fitting gap 7002 to be larger than the size C of the third fitting gap 7003, and designing the size A of the first fitting gap 7001 to be larger than the size C of the third fitting gap 7003, the displacement of the tip 5210 of the valve needle 5200 perpendicular to the axial direction is greater than the displacement of the piston component 3000 perpendicular to the axial direction. In this way, it can be ensured that under any displacement of the piston component 3000 perpendicular to the axial direction, the tip 5210 of the valve needle 5200 can adaptively find the inner hole 3110 of the first sealing plug 3100, thereby achieving a good fitting and sealing effect.

[0066] Combine Figure 2 、 Figure 7 and Figure 10 As shown, in some embodiments of the present application, the piston component 3000 includes a first piston portion 3001 and a second piston portion 3002. The first piston portion 3001 is disposed on the second piston portion 3002 and is axially protruding upward relative to the second piston portion 3002. The center of gravity of the entire piston component 3000 is designed to be no higher than half of the axial height of the piston component 3000. For example, the radial dimension of the first piston portion 3001 is smaller than the radial dimension of the second piston portion 3002, and the axial dimension of the first piston portion 3001 is smaller than the axial dimension of the second piston portion 3002. In this way, the center of gravity of the piston component 3000 is located on the second piston portion 3002 and is lower than half of the axial height of the piston component 3000. On this basis, along the axial direction, the matching length between the cavity wall of the valve cavity and the first piston part 3001 is L3, and the matching length between the cavity wall of the valve cavity and the second piston part 3002 is L4. The condition L4>L3 needs to be met. In this way, better support for the piston component 3000 can be achieved, the piston component 3000 is not easy to tilt, and the reliability of the movement of the piston component 3000 is improved.

[0067] For example, the piston component 3000 is radially limited by the cavity wall 1101 of the first valve cavity 1100 for illustration, and the fitting lengths L3 and L4 are specifically reflected between the piston component 3000 and the cavity wall 1101 of the first valve cavity 1100. The piston component 3000 is radially limited by the cavity wall 1101 of the first valve cavity 1100, that is, the first piston part 3001 and the second piston part 3002 are both radially limited by the cavity wall 1101 of the first valve cavity 1100. The first valve cavity 1100 includes an upper valve cavity 1110 and a lower valve cavity 1120. The fitting length along the axial direction between the first piston part 3001 and the cavity wall 1111 of the upper valve cavity 1110 of the first valve cavity 1100 is L3, and the fitting length along the axial direction between the second piston part 3002 and the cavity wall 1121 of the lower valve cavity 1120 of the first valve cavity 1100 is L4 ( Figure 6 L4 is L41+L42), L4>L3.

[0068] Furthermore, in some embodiments of the present application, the valve needle 5200 is made of aluminum alloy. By designing the valve needle 5200 to be made of aluminum alloy, the density of aluminum alloy is lower than that of stainless steel, which can reduce the weight of the moving iron core component 5000, thereby improving the operating performance of the solenoid valve 100.

[0069] The second aspect of the present application discloses a refrigeration device 200, such as Figure 1 and Figure 12 As shown, the refrigeration equipment 200 includes the above-mentioned solenoid valve 100, and the solenoid valve 100 includes a moving iron core component 5000 and a piston component 3000. The moving iron core component 5000 includes a valve needle 5200, and the piston component 3000 includes a first sealing plug 3100, wherein the valve needle 5200 has a tip 5210, and the angle of the tip 5210 is designed to be θ1. The first sealing plug 3100 has an inner hole 3110, and the opening angle of the inner hole 3110 is designed to be θ2. The condition θ1>θ2 needs to be satisfied, and the valve needle 5200 is inserted into the inner hole 3110 through the tip 5210 to seal the inner hole 3110. By improving the angle of the tip 5210 of the valve needle 5200 and the opening angle of the inner hole 3110 of the first sealing plug 3100, it is beneficial to improve the fit between the tip 5210 of the valve needle 5200 and the inner hole 3110 of the first sealing plug 3100, and avoid the tip 5210 of the valve needle 5200 being inserted into the inner hole 3110 of the first sealing plug 3100 for too long, which is beneficial to improving the sealing performance and reducing the risk of internal leakage of the solenoid valve 100.

[0070] The solenoid valve 100 is used to control the flow of a medium in a refrigeration device 200. For example, the refrigeration device 200 includes an integrated module (not shown in the figure), which is provided with a mounting cavity (not shown in the figure). The solenoid valve 100 is installed in the mounting cavity, thereby controlling the flow of the medium in the flow path. Of course, the refrigeration device 200 in this embodiment is not limited to this. As long as the solenoid valve 100 can achieve flow control of the medium. It is understandable that the solenoid valve 100 of the refrigeration device 200 adopts the technical solution of the above-mentioned embodiment, and therefore has at least the beneficial effects brought about by the technical solution of the above-mentioned embodiment, which will not be repeated here.

[0071] The third aspect of the present application discloses a car 300, such as Figure 1 、 Figure 12 and Figure 13 As shown, the automobile 300 includes the above-mentioned refrigeration device 200, and the refrigeration device 200 includes a solenoid valve 100, the solenoid valve 100 includes a moving iron core component 5000 and a piston component 3000, the moving iron core component 5000 includes a valve needle 5200, and the piston component 3000 includes a first sealing plug 3100, wherein the valve needle 5200 has a tip 5210, and the angle of the tip 5210 is designed to be θ1, the first sealing plug 3100 has an inner hole 3110, and the opening angle of the inner hole 3110 is designed to be θ2, which needs to meet the condition θ1>θ2, and the valve needle 5200 is inserted into the inner hole 3110 through the tip 5210 to seal the inner hole 3110. By improving the angle of the tip 5210 of the valve needle 5200 and the opening angle of the inner hole 3110 of the first sealing plug 3100, it is beneficial to improve the fit between the tip 5210 of the valve needle 5200 and the inner hole 3110 of the first sealing plug 3100, and avoid the tip 5210 of the valve needle 5200 being inserted into the inner hole 3110 of the first sealing plug 3100 for too long, which is beneficial to improving the sealing performance and reducing the risk of internal leakage of the solenoid valve 100.

[0072] It is understandable that the car 300 can be a new energy car 300, the new energy car 300 can be a pure electric car 300 with an electric motor as the main driving force, and the new energy car 300 can also be a hybrid electric car 300 with an internal combustion engine and an electric motor as the main driving force. The internal combustion engine and the electric motor that provide driving power for the new energy car 300, wherein the internal combustion engine can use gasoline, diesel, hydrogen, etc. as fuel, and the way to provide electrical energy to the electric motor can use power batteries, hydrogen fuel cells, etc., are not specifically limited here. It should be noted that this is only an exemplary description of the structure of the new energy car 300, etc., and is not intended to limit the scope of protection of the present invention. Since the refrigeration equipment 200 of the car 300 adopts the technical solution of the above embodiment, it at least has the beneficial effects brought about by the technical solution of the above embodiment, and will not be repeated here.

[0073] The above description is only a preferred embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made based on the contents of the present application specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present application.

Claims

1. A solenoid valve (100), characterized in that: include: A movable iron core component (5000), the movable iron core component (5000) comprising a valve needle (5200), the valve needle (5200) having a tip (5210), the angle of the tip (5210) being θ1; and A piston component (3000) includes a first sealing plug (3100), the first sealing plug (3100) has an inner hole (3110), the tip (5210) is suitable for being inserted into the inner hole (3110) for sealing, and the opening angle of the inner hole (3110) is θ2, satisfying θ1>θ2.

2. The solenoid valve (100) according to claim 1, characterized in that The first sealing plug (3100) has a first sealing surface (3101) surrounding the inner hole (3110), the first sealing surface (3101) is a chamfered inclined surface, and the gradually expanding angle of the first sealing surface (3101) constitutes the opening angle of the inner hole (3110).

3. The solenoid valve (100) according to claim 1, characterized in that The movable iron core component (5000) further comprises a movable iron core body (5100), wherein the movable iron core body (5100) is provided with a first guide hole (5110), and the valve needle (5200) is mounted on the movable iron core component (5000) and passes through the first guide hole (5110); The solenoid valve (100) further comprises a static iron core component (6000), wherein the static iron core component (6000) is provided with a second guide hole (6110), and the valve needle (5200) also passes through the second guide hole (6110); In which, the valve needle (5200) can move axially relative to the first guide hole (5110) and the second guide hole (6110), the fitting length L1 of the first guide hole (5110) and the valve needle (5200) along the axial direction is greater than 1.5 mm, and the fitting length L2 of the second guide hole (6110) and the valve needle (5200) along the axial direction is greater than 1.5 mm.

4. The solenoid valve (100) according to claim 3, characterized in that Satisfies L1>L2.

5. The solenoid valve (100) according to claim 1, characterized in that The movable iron core component (5000) further comprises a movable iron core body (5100), the movable iron core body (5100) is provided with a first guide hole (5110), the valve needle (5200) is mounted on the movable iron core component (5000) and passes through the first guide hole (5110), a first fitting gap (7001) is provided between the valve needle (5200) and a hole wall (5111) of the first guide hole (5110), and the size of the first fitting gap (7001) is A; The solenoid valve (100) further comprises a static iron core component (6000), the static iron core component (6000) is provided with a second guide hole (6110), the valve needle (5200) further passes through the second guide hole (6110), a second fitting gap (7002) is provided between the valve needle (5200) and a hole wall (6111) of the second guide hole (6110), and the size of the second fitting gap (7002) is B; Satisfies B>A.

6. The solenoid valve (100) according to claim 5, characterized in that The solenoid valve (100) is provided with a valve cavity, the piston component (3000) is movably provided in the valve cavity, a third fitting gap (7003) is provided between the piston component (3000) and the cavity wall of the valve cavity, and the size of the third fitting gap (7003) is C, satisfying B>A>C.

7. The solenoid valve (100) according to claim 1, characterized in that The solenoid valve (100) is provided with a valve cavity, and the piston component (3000) is movably arranged in the valve cavity; The piston component (3000) comprises a first piston portion (3001) and a second piston portion (3002); the first piston portion (3001) is arranged on the second piston portion (3002) and is axially protruded upward relative to the second piston portion (3002); the center of gravity of the piston component (3000) is not higher than half of the axial height of the piston component (3000); The fitting length between the first piston part (3001) and the cavity wall of the valve cavity in the axial direction is L3, and the fitting length between the second piston part (3002) and the cavity wall of the valve cavity in the axial direction is L4, satisfying L4>L3.

8. The solenoid valve (100) according to claim 1, characterized in that The valve needle (5200) is made of aluminum alloy.

9. A refrigeration device (200), characterized in that: The solenoid valve (100) comprises the solenoid valve (100) according to any one of claims 1 to 8.

10. An automobile (300), characterized in that: The refrigeration device (200) comprises the refrigeration device (200) according to claim 9.

Images