Electromagnetic valve and air conditioning system

Abstract

The utility model relates to an electromagnetic valve and an air conditioning system. The electromagnetic valve comprises a valve body, an electromagnetic coil assembly, a valve element, an input pipeline and an output pipeline. The valve body is provided with a valve cavity, an inlet and an outlet, wherein the inlet and the outlet are communicated with the valve cavity. The valve cavity has an axial direction and a radial direction; the input pipeline is connected to an inlet of the valve body; the output pipeline is connected to an outlet of the valve body; at least one of the input pipeline and the output pipeline comprises a first pipe section and a second pipe section which form an angle and are formed in a split mode. Wherein the first pipe section is connected with the valve body, the multiple second pipe sections are arranged, at least part of the multiple second pipe sections are different in bending angle, and one of the multiple second pipe sections can be selectively connected to the first pipe section. The first pipe section and the valve body form an integrated standard model for production so as to replace different second pipe sections according to working environment requirements, and the second pipe section selects a proper assembly angle relative to the first pipe section, so that the second pipe section can be adaptively connected with an external pipeline, the production efficiency can be improved, and automatic production can be promoted.

Description

Technical Field

[0001] The present application relates to the technical field of solenoid valves, and particularly to a solenoid valve and an air conditioning system. Background Art

[0002] In the related art, different solenoid valves are applied in different working environments, so the structures of the air outlet pipes of different solenoid valves are also different. During production and processing, special tooling needs to be designed for products according to the air outlet pipes with different structures. The solenoid valve structures are not unified and cannot form standard parts. Frequent replacement of production models is not conducive to improving production efficiency and realizing automation. Summary of the Utility Model

[0003] Based on this, in view of the above technical problems, it is necessary to provide a solenoid valve that can achieve unified standardized production to improve production efficiency and automation.

[0004] The solenoid valve includes a valve body, an electromagnetic coil assembly, a valve core, an input pipe, and an output pipe; the valve body is provided with a valve cavity and an inlet and an outlet communicating with the valve cavity, and the inlet and the outlet are arranged at intervals; the valve cavity has an axial direction and a radial direction; the electromagnetic coil assembly is connected to the valve body; the valve core is arranged in the valve cavity and connected to the electromagnetic coil assembly, and can move under the action of the electromagnetic coil assembly to control the on-off of the inlet and the outlet; the input pipe is connected to the inlet of the valve body; the output pipe is connected to the outlet of the valve body; at least one of the input pipe and the output pipe includes a first pipe section and a second pipe section, the two are angled and are integrally formed; wherein, the first pipe section is connected to the valve body, there are a plurality of the second pipe sections, and among the plurality of second pipe sections, at least part of the bending angles are different and can be selectively connected to the first pipe section.

[0005] It can be understood that the solenoid valve controls the movement of the valve core through the electromagnetic coil assembly to change the communication state between the inlet and the outlet. The input pipe inputs the fluid into the valve cavity from the inlet, and after the valve core is opened, the fluid can be output from the outlet. Among the first pipe section and the second pipe section, the first pipe section and the valve body form an integrated standard model for production, and different second pipe sections can be replaced to be connected to the first pipe section according to different working environment requirements. The separate setting of the second pipe section and the first pipe section is conducive to the second pipe section selecting a suitable assembly angle relative to the first pipe section, so as to be easily connected to the external pipe. The operation is simple and convenient, without the need to design different solenoid valve tooling models according to different working environments, which is conducive to improving production efficiency and promoting the realization of automated production.

[0006] In one embodiment, the projections of the input pipe and the output pipe along the axial direction of the valve cavity are angled.

[0007] It can be understood that such a setting is conducive to adapting to the working environment for connection with different external pipelines.

[0008] In one embodiment, one of the input pipeline and the output pipeline is set as a straight pipe, and the other includes the first pipe section and the second pipe section. The second pipe section can rotate relative to the first pipe section to form a target angle with the straight pipe and then be welded to the first pipe section.

[0009] It can be understood that setting one of the input pipeline and the output pipeline as a straight pipe has a simple structure and is conducive to directly forming an integrated production standard model with the valve body. Setting the other as a combination of the first pipe section and the second pipe section is conducive to adjusting the angle between the input pipeline and the output pipeline to meet the requirements of different working environments.

[0010] In one embodiment, the length dimension of the connection between the second pipe section and the first pipe section is a, and the length dimension of the first pipe section is b, where 45%b ≤ a ≤ 65%b.

[0011] It can be understood that such a setting ensures stable assembly and avoids a decrease in assembly accuracy caused by an overly long assembly dimension.

[0012] In one embodiment, the first pipe section and the second pipe section are in plug-in fit, and the solenoid valve further includes a limiting portion, which is provided on the first pipe section or the second pipe section.

[0013] It can be understood that the plug-in fit method is simple to operate. The setting of the limiting portion is conducive to quickly forming assembly positioning.

[0014] In one embodiment, the second pipe section is inserted into the first pipe section; the first pipe section is provided with the limiting portion, and along the axial direction of the first pipe section, the limiting portion is gradually expanded from the first pipe section towards the second pipe section; alternatively, the second pipe section is provided with the limiting portion, and along the axial direction of the second pipe section, the limiting portion is gradually tapered from the second pipe section towards the first pipe section.

[0015] It can be understood that inserting the second pipe section into the first pipe section is simple to operate. When the first pipe section is configured with a limiting portion, the limiting portion is set as a gradually expanding structure, and when the second pipe section is configured with a limiting portion, the limiting portion is set as a gradually tapered structure. The structure of the limiting portion is simple and convenient to process.

[0016] In one embodiment, the first pipe section is inserted into the second pipe section; the second pipe section is provided with the limiting portion, and along the axial direction of the second pipe section, the limiting portion is gradually expanded from the second pipe section towards the second pipe section; alternatively, the first pipe section is provided with the limiting portion, and along the axial direction of the first pipe section, the limiting portion is gradually tapered from the first pipe section towards the second pipe section.

[0017] It is understandable that the first pipe section is inserted into the second pipe section, and the operation is simple. When the second pipe section is configured with a limiting portion, the limiting portion is set to a gradually expanding structure, while when the first pipe section is configured with a limiting portion, the limiting portion is set to a gradually contracting structure. The structure of the limiting portion is simple and the processing is convenient.

[0018] In one embodiment, the valve body is configured with a mounting hole communicating with the valve cavity. The first pipe section is inserted into the mounting hole and is connected and cooperated with the valve body. The length dimension of the first pipe section inserted into the mounting hole is c, the length dimension of the first pipe section is b, and c = (10% - 25%)b.

[0019] It is understandable that the arrangement of the mounting hole facilitates the installation of the first pipe section. By setting the length of the first pipe section inserted into the mounting hole, the assembly stability can be ensured, and the interference with the valve body due to too long assembly dimensions can be avoided.

[0020] In one embodiment, a smooth transition is formed between the first pipe section and the second pipe section.

[0021] It is understandable that the smooth transition is beneficial to reducing stress concentration and improving the service life.

[0022] The present application also provides an air conditioning system, including a refrigeration circuit and the solenoid valve described above; the refrigeration circuit has a plurality of refrigeration pipelines, and at least part of the refrigeration pipelines are installed with the solenoid valve.

[0023] It is understandable that by installing the above solenoid valve, the corresponding second pipe section can be selected according to different refrigeration pipelines to connect the solenoid valve body with the corresponding refrigeration pipeline, without the need to equip different solenoid valves, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a cross-sectional view of the solenoid valve provided by the present application;

[0026] Figure 2 It is a three-dimensional view of the solenoid valve provided by the present application;

[0027] Figure 3 For Figure 1 The partial enlarged view at A in

[0028] Figure 4 Partial enlarged view of the first embodiment of the limiting part of the solenoid valve provided by this application;

[0029] Figure 5 Partial enlarged view of the second embodiment of the limiting part of the solenoid valve provided by this application;

[0030] Figure 6 Partial enlarged view of the third embodiment of the limiting part of the solenoid valve provided by this application;

[0031] Figure 7 Partial enlarged view of the fourth embodiment of the limiting part of the solenoid valve provided by this application.

[0032] Explanation of reference numerals: 100, solenoid valve; 10, valve body; 101, valve cavity; 102, inlet; 103, outlet; 104, mounting hole; 20, electromagnetic coil assembly; 21, static iron core; 22, moving iron core; 23, elastic member; 30, valve core; 40, input pipeline; 50, output pipeline; 51, first pipe section; 52, second pipe section; 60, limiting part. Detailed implementation manners

[0033] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be intermediate elements at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0035] In this article, spatially related terms such as "upper part" and "lower part" are defined with reference to the drawings. Therefore, it will be understood that "upper part" and "lower part" can be used interchangeably. It will be understood that when a layer is referred to as being "on" another layer, it can be directly formed on the other layer or there can also be an intermediate layer. Therefore, it will be understood that when a layer is referred to as being "directly on" another layer, no intermediate layer is inserted therebetween.

[0036] In the accompanying drawings, in order to clearly illustrate, the dimensions of layers and regions may be exaggerated. It is understood that when a layer or element is referred to as being "on" another layer or substrate, the layer or element may be directly on the other layer or substrate, or there may also be an intermediate layer. Additionally, it is also understood that when a layer is referred to as being "between" two layers, the layer may be the only layer between the two layers, or there may also be one or more intermediate layers. Additionally, the same reference numerals always denote the same elements.

[0037] In the following text, although terms such as "first", "second", etc. may be used to describe various components, these components do not necessarily have to be limited to the above terms. The above terms are only used to distinguish one component from another. It will also be understood that an expression used in the singular form includes the plural form, unless the singular form of the expression has a significantly different meaning in the context. Additionally, in the following embodiments, it will also be understood that the terms "comprising" and / or "having" used herein indicate the presence of the stated features or components, but do not exclude the presence or addition of one or more other features or components.

[0038] In the following embodiments, when a layer, region, or element is "connected", it can be interpreted that the layer, region, or element is not only directly connected but also connected through other constituent elements placed therebetween. For example, when a layer, region, element, etc. is described as being connected or electrically connected, the layer, region, element, etc. can not only be directly connected or directly electrically connected, but can also be connected or electrically connected through another layer, region, element, etc. placed therebetween.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0040] It should also be understood that terms such as "including / comprising" or "having", etc. specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0041] Please refer to Figures 1 to 7The present application provides a solenoid valve 100, which includes a valve body 10, an electromagnetic coil assembly 20 and a valve core 30. The valve body 10 is provided with a valve cavity 101 and an inlet 102 and an outlet 103 connected to the valve cavity 101, and the inlet 102 and the outlet 103 are arranged at intervals; the valve cavity 101 has axial and radial directions; the electromagnetic coil assembly 20 is connected to the valve body 10; the valve core 30 is arranged in the valve cavity 101 and connected to the electromagnetic coil assembly 20, and can move under the action of the electromagnetic coil assembly 20 to control the opening and closing of the inlet 102 and the outlet 103.

[0042] With this arrangement, the valve chamber 101 provides space for the valve core 30 to move, and the electromagnetic coil assembly 20 can control the movement of the valve core 30 to achieve fluid on / off switching. Specifically, when fluid enters the valve chamber 101 from the inlet 102 and the electromagnetic coil assembly 20 is energized, the valve core 30 moves axially along the valve chamber 101 away from the inlet 102 and the outlet 103, connecting the inlet 102 and the outlet 103, allowing fluid to flow out of the outlet 103. When the electromagnetic coil assembly 20 is de-energized, the valve core 30 is blocked between the inlet 102 and the outlet 103, disconnecting the inlet 102 and the outlet 103, thereby achieving fluid disconnection, i.e., preventing fluid from flowing out of the outlet 103.

[0043] Specifically, the electromagnetic coil assembly 20 includes a static iron core 21, a movable iron core 22, a coil bobbin around which a coil is wound, and an elastic member 23. The static iron core 21 is mounted on the end of the coil bobbin closest to the coil. The static iron core 21 and movable iron core 22 are spaced apart, and the elastic member 23 is connected between the static iron core 21 and the movable iron core 22. The end of the movable iron core 22 facing away from the static iron core 21 is connected to the valve core 30. During operation, the coil is energized, generating a magnetic effect. The static iron core 21 attracts the movable iron core 22, which in turn drives the valve core 30 away from the inlet 102 or outlet 103, enabling fluid flow between the inlet 102 and outlet 103. When the coil is de-energized, the movable iron core 22 returns to its original position under the action of the elastic member 23, driving the valve core 30 toward the inlet 102 or outlet 103 until the valve core 30 blocks the inlet 102 and outlet 103.

[0044] Furthermore, the solenoid valve 100 further includes an input pipe 40 and an output pipe 50. The input pipe 40 is connected to the inlet 102 of the valve body 10, and the output pipe 50 is connected to the outlet 103 of the valve body 10. In this arrangement, the input pipe 40 can input fluid into the valve body 10, and the fluid output by the valve body 10 can flow out through the output pipe 50.

[0045] like Figure 1 and Figure 2As shown, specifically, at least one of the input pipe 40 and the output pipe 50 includes a first pipe section 51 and a second pipe section 52, which are angled and integrally formed; wherein, the first pipe section 51 is connected to the valve body 10, and there are multiple second pipe sections 52. Among the multiple second pipe sections 52, at least some have different bending angles and can be selectively connected to the first pipe section 51. In this way, the first pipe section 51 can form an integrated standard production model with the valve body 10 to improve production efficiency, that is, the valve body 10 with the first pipe section 51 can be mass-produced. During actual assembly, the second pipe section 52 with a different bending angle can be selected according to the requirements of the working environment, and the second pipe section 52 can select a suitable assembly position relative to the first pipe section 51 to form a connection with other pipe fittings in the working environment. With this setting, there is no need to produce solenoid valves 100 with different input pipes 40 or output pipes 50 according to different working environments, and there is no need to design separate mold toolings for different solenoid valves 100, which is beneficial to improving production efficiency and realizing automation.

[0046] As Figure 2 shown, in a further embodiment, the projections of the input pipe 40 and the output pipe 50 along the axis of the valve cavity 101 are angled, and this setting is to adapt to avoiding surrounding structures in different working environments and completing the connection with external pipe fittings.

[0047] As Figure 1 and Figure 2 shown, in a further embodiment, one of the input pipe 40 and the output pipe 50 is set as a straight pipe, and the other includes a first pipe section 51 and a second pipe section 52. Among them, the structure of the straight pipe is simple, and during processing, it is easy to form an integrated production standard model with the valve body 10, that is, the valve body 10 with this straight pipe can be mass-produced. At the same time, the straight pipe can be directly assembled with external pipe fittings, which is easy to install and maintain. Further, design the other pipe to include a first pipe section 51 and a second pipe section 52. During assembly, the straight pipe can be first connected to external pipe fittings, and then a suitable second pipe section 52 can be selected according to the position of the valve body 10 after the straight pipe is connected, and the second pipe section 52 can be assembled at a suitable angle. Specifically, the second pipe section 52 can be rotated relative to the first pipe section 51 to form a target included angle with the straight pipe and then welded to the first pipe section 51. Among them, the target included angle is: the target value set according to the working conditions for the included angle between the projections of the above-mentioned input pipe 40 and output pipe 50 along the axis of the valve cavity 101.

[0048] Exemplarily, as Figure 1 and Figure 2 shown, the input pipe 40 is set as a straight pipe, and the output pipe 50 includes a first pipe section 51 and a second pipe section 52. In other embodiments, it can also be that the output pipe 50 is set as a straight pipe, and the input pipe 40 includes a first pipe section 51 and a second pipe section 52.

[0049] Exemplarily, the welding method can be TIG welding, flame welding, laser welding, etc., which are only used as examples here.

[0050] As Figure 1 and Figure 2 shown, in a specific embodiment, a smooth transition is formed between the first pipe section 51 and the second pipe section 52 to reduce stress concentration, improve the bearing capacity of the fluid pressure, promote the smooth flow of the fluid at the corner, reduce the dead angle of fluid flow, and also make the structure more beautiful.

[0051] As Figure 1 shown, in a specific embodiment, the length dimension of the connection between the second pipe section 52 and the first pipe section 51 is a, the length dimension of the first pipe section 51 is b, and 45%b ≤ a ≤ 65%b. Such a setting can ensure that there is enough assembly dimension between the first pipe section 51 and the second pipe section 52, thereby ensuring the stability of the assembly, while reducing the poor assembly accuracy caused by too long assembly dimension. Exemplarily, a = 45%b, 50%b or 65%b.

[0052] As Figure 1 shown, in a specific embodiment, the valve body 10 is configured with an installation hole 104 communicating with the valve cavity 101, and the first pipe section 51 is inserted into the installation hole 104 and connected and cooperated with the valve body 10. The setting of the installation hole 104 is conducive to the assembly of the first pipe section 51.

[0053] As Figure 1 shown, more specifically, the length dimension of the first pipe section 51 inserted into the installation hole 104 is c, the length dimension of the first pipe section 51 is b, and c = (10% - 25%)b. Such a setting can ensure the assembly dimension between the first pipe section 51 and the hole wall of the installation hole 104, ensure the stability of the connection between the first pipe section 51 and the valve body 10, and at the same time avoid the influence of the too long size of the installation hole 104 on the structure of the valve body 10. Exemplarily, c = 10%b, 17%b or 25%b.

[0054] As Figure 1 and Figure 3 shown, in a further embodiment, the first pipe section 51 and the second pipe section 52 are inserted and mated, and the connection method of the insertion and mating is simple and the operation is convenient.

[0055] As Figures 4 to 7 shown, specifically, the solenoid valve 100 further includes a limiting portion 60, and the limiting portion 60 is provided on the first pipe section 51 or the second pipe section 52. Such a setting enables one of them to be inserted into the other during assembly and can abut at the corresponding limiting portion 60, and then be fixed by welding after abutting, which is conducive to forming a fast assembly positioning and promoting the stability of the cooperation during welding.

[0056] As Figure 4As shown, in the first embodiment, the second pipe section 52 is inserted into the first pipe section 51; the first pipe section 51 is provided with a limiting portion 60. In this way, the second pipe section 52 is inserted into the first pipe section 51 and can abut against the limiting portion 60 inside the first pipe section 51. Specifically, along the axial direction of the first pipe section 51, the limiting portion 60 is gradually expanded from the first pipe section 51 towards the second pipe section 52 to form an inclined surface for abutting against the end surface of the second pipe section 52, with a simple structure and easy to process.

[0057] As Figure 5 shown, in the second embodiment, the second pipe section 52 is inserted into the first pipe section 51; the second pipe section 52 is provided with a limiting portion 60. In this way, the second pipe section 52 is inserted into the first pipe section 51, and the first pipe section 51 can abut against the limiting portion 60 of the second pipe section 52. Specifically, along the axial direction of the second pipe section 52, the limiting portion 60 is gradually tapered from the second pipe section 52 towards the first pipe section 51 to form an inclined surface for abutting against the end surface of the first pipe section 51, with a simple structure and easy to process.

[0058] As Figure 6 shown, in the third embodiment, the first pipe section 51 is inserted into the second pipe section 52; the second pipe section 52 is provided with a limiting portion 60, and along the axial direction of the second pipe section 52, the limiting portion 60 is gradually expanded from the second pipe section 52 towards the second pipe section 52. It is similar to the first embodiment, and the specific effects can be referred to the first embodiment and will not be elaborated here.

[0059] As Figure 7 shown, in the fourth embodiment, the first pipe section 51 is inserted into the second pipe section 52; the first pipe section 51 is provided with a limiting portion 60, and along the axial direction of the first pipe section 51, the limiting portion 60 is gradually tapered from the first pipe section 51 towards the second pipe section 52. It is similar to the second embodiment, and the specific effects can be referred to the second embodiment and will not be elaborated here.

[0060] The present application also provides an air conditioning system, which includes a refrigeration circuit and the above-mentioned solenoid valve 100. The refrigeration circuit has multiple refrigeration pipelines, and at least part of the refrigeration pipelines are installed with the solenoid valve 100. By installing the above-mentioned solenoid valve 100, the corresponding second pipe section 52 can be selected according to different pipeline environments, and only different second pipe sections 52 need to be equipped without the need to equip different solenoid valves 100, making the assembly more convenient.

[0061] The technical features of the above-mentioned embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as the combinations of these technical features do not conflict, they should be considered as the scope described in this specification.

[0062] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A solenoid valve, characterized in that, Comprising: A valve body (10) provided with a valve chamber (101), an inlet (102) and an outlet (103) communicating with the valve chamber (101), the inlet (102) and the outlet (103) being spaced apart; the valve chamber (101) having an axial direction and a radial direction; An electromagnetic coil assembly (20) connected to the valve body (10); A valve core (30) disposed in the valve chamber (101) and connected to the electromagnetic coil assembly (20), capable of moving under the action of the electromagnetic coil assembly (20) to control the on-off of the inlet (102) and the outlet (103); An input pipeline (40) connected to the inlet (102) of the valve body (10); An output pipeline (50) connected to the outlet (103) of the valve body (10); At least one of the input pipeline (40) and the output pipeline (50) includes a first pipe section (51) and a second pipe section (52), the two being angled and integrally formed; wherein, the first pipe section (51) is connected to the valve body (10), and there are multiple second pipe sections (52), among which at least some have different bending angles and can be selectively connected to the first pipe section (51).

2. The solenoid valve according to claim 1, wherein, The projections of the input pipeline (40) and the output pipeline (50) along the axial direction of the valve chamber (101) are angled.

3. The solenoid valve according to claim 2, characterized in that, One of the input pipeline (40) and the output pipeline (50) is set as a straight pipe, and the other includes the first pipe section (51) and the second pipe section (52), and the second pipe section (52) can be rotated relative to the first pipe section (51) to form a target included angle with the straight pipe and then welded to the first pipe section (51).

4. The solenoid valve according to claim 3, characterized in that, The length dimension of the connection between the second pipe section (52) and the first pipe section (51) is a, and the length dimension of the first pipe section (51) is b, 45%b ≤ a ≤ 65%b.

5. The solenoid valve according to claim 3, characterized in that, The first pipe section (51) and the second pipe section (52) are in plug-in fit, and the solenoid valve further includes a limiting portion (60) disposed on the first pipe section (51) or the second pipe section (52).

6. The solenoid valve according to claim 5, characterized in that, The second pipe section (52) is inserted into the first pipe section (51); The first pipe section (51) is provided with the limiting portion (60), and along the axial direction of the first pipe section (51), the limiting portion (60) is gradually expanded from the first pipe section (51) towards the second pipe section (52); alternatively, the second pipe section (52) is provided with the limiting portion (60), and along the axial direction of the second pipe section (52), the limiting portion (60) is gradually tapered from the second pipe section (52) towards the first pipe section (51).

7. The solenoid valve according to claim 5, characterized in that, The first pipe section (51) is inserted into the second pipe section (52); The second pipe section (52) is provided with the limiting portion (60), and along the axial direction of the second pipe section (52), the limiting portion (60) is arranged to gradually expand from the second pipe section (52) towards the second pipe section (52); alternatively, the first pipe section (51) is provided with the limiting portion (60), and along the axial direction of the first pipe section (51), the limiting portion (60) is arranged to gradually contract from the first pipe section (51) towards the second pipe section (52).

8. The solenoid valve according to claim 3, wherein, The valve body (10) is configured with an installation hole (104) communicating with the valve cavity (101), the first pipe section (51) is inserted into the installation hole (104) and is connected and cooperated with the valve body (10), the length dimension of the first pipe section (51) inserted into the installation hole (104) is c, the length dimension of the first pipe section (51) is b, and c = (10% - 25%)b.

9. The solenoid valve according to claim 3, characterized in that, A smooth transition is formed between the first pipe section (51) and the second pipe section (52).

10. An air conditioning system, characterized in that, Comprising: The solenoid valve according to any one of claims 1 to 9; A refrigeration circuit having a plurality of refrigeration pipelines, and at least part of the refrigeration pipelines are installed with the solenoid valve.

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