Electronic expansion valve

Abstract

The utility model discloses an electronic expansion valve which comprises a valve body and a sleeve. The valve body comprises a connecting sleeve and a connecting ring, the connecting sleeve is completely sleeved with the connecting ring, and the connecting ring is fixedly connected with the connecting sleeve to form a preassembled piece. And the sleeve is fixedly connected with the connecting sleeve.

Description

Technical Field

[0001] The present application relates to the field of refrigeration control technology, and in particular to an electronic expansion valve. Background Art

[0002] The electronic expansion valve includes a valve seat and a valve body. In the related art, in order to facilitate the installation of the valve body on the valve seat, a compression ring is usually arranged outside the valve body, and the compression ring is connected to the valve seat and presses the valve body, so that the valve body is fixedly installed on the valve seat. However, since the compression ring and the valve seat are clearance-matched, during the installation process, the valve body needs to be placed in the valve seat first, and then the compression ring and the valve seat are connected. Therefore, before the valve body and the compression ring are installed, the valve body and the compression ring are not fixed but can move relatively, which makes storage and transportation inconvenient. Utility Model Content

[0003] The embodiment of the present application provides an electronic expansion valve to solve the problems of inconvenience in storage and transportation existing in the related art.

[0004] The electronic expansion valve of the embodiment of the present application includes:

[0005] The valve body comprises a connecting sleeve and a connecting ring, wherein the connecting ring is entirely sleeved around the connecting sleeve and fixedly connected to the connecting sleeve to form a preassembled component;

[0006] A sleeve is fixedly connected to the connecting sleeve.

[0007] According to some embodiments of the present application, it also includes:

[0008] The valve seat has an installation cavity, at least part of the connecting sleeve and at least part of the connecting ring are located in the installation cavity, and the preassembled part is fixedly connected to the valve seat.

[0009] According to some embodiments of the present application, the connecting sleeve is connected to the sleeve via a welding portion, and the connecting ring is covered on the welding portion.

[0010] According to some embodiments of the present application, the valve seat has a top surface, the mounting cavity is formed by being recessed from the top surface into the valve seat; a portion of the sleeve extends out of the top surface;

[0011] The welding portion is lower than the top surface.

[0012] According to some embodiments of the present application, the connecting ring includes a ring body and an annular portion, the ring body is fixedly connected to the valve seat and covered by the welding portion, and the annular portion is convexly arranged on the outer surface of the ring body and sleeved on the outer periphery of the sleeve;

[0013] The outer surface is flush with the top surface.

[0014] According to some embodiments of the present application, the connecting ring and the connecting sleeve are interference fit; and / or,

[0015] The connecting ring is threadedly connected to the valve seat.

[0016] According to some embodiments of the present application, the connecting ring includes a ring body and an annular portion, the ring body is fixedly connected to the valve seat, and the annular portion is convexly arranged on the ring body and sleeved on the outer circumference of the sleeve;

[0017] A cut surface is provided on the outer periphery of the annular portion.

[0018] According to some embodiments of the present application, the cavity wall of the installation cavity has a first limiting portion;

[0019] The connecting sleeve includes a sleeve body and a stop ring, the sleeve body is fixedly connected to the sleeve, the stop ring is connected to the outer circumference of the sleeve body and abuts against the first limiting portion, and the connecting ring is sleeved on the outer circumference of the sleeve body and presses against the stop ring.

[0020] According to some embodiments of the present application, there is a gap between the outer peripheral surface of the stop ring and the inner wall surface of the installation cavity.

[0021] According to some embodiments of the present application, a sealing member is provided between the portion of the sleeve body that is not sleeved by the connecting ring and the cavity wall of the installation cavity.

[0022] According to some embodiments of the present application, the connecting ring is made of a first material, and the connecting sleeve is made of a second material, and the first material is different from the second material.

[0023] One embodiment of the above application has at least the following advantages or beneficial effects:

[0024] The electronic expansion valve in the embodiment of the present application, the valve body includes a connecting sleeve and a connecting ring that are connected to each other. Before the valve body is installed in the installation cavity of the valve seat, the connecting sleeve and the connecting ring can be connected first, so that the connecting sleeve and the connecting ring form a preassembled part, which is convenient for storage and transportation, and also facilitates the installation of the valve body into the installation cavity of the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Shown is a three-dimensional schematic diagram of an electronic expansion valve according to an embodiment of the present application, in which the coil assembly is omitted.

[0026] Figure 2 Shown is a cross-sectional view of an electronic expansion valve according to an embodiment of the present application, in which the coil assembly is omitted.

[0027] Figure 3 It is shown that Figure 2 A local enlarged view of point X1 in the middle.

[0028] Figure 4 Shown is an exploded schematic diagram of a connecting sleeve and a connecting ring.

[0029] Figure 5 A schematic cross-sectional view of the welded portion below the top surface is shown.

[0030] The reference numerals are described as follows:

[0031] 110. Valve body

[0032] 112. Connecting sleeve

[0033] 112a, sleeve body

[0034] 112b, stop ring

[0035] 112c, second limiting portion

[0036] 113. Connecting ring

[0037] 113a, Ring body

[0038] 113b, annular portion

[0039] 113c, outer surface

[0040] 113d, section

[0041] 114. Welding Department

[0042] 120. Casing

[0043] 130. Valve core assembly

[0044] 140. Chamber

[0045] 150. Valve seat

[0046] 151. Installation cavity

[0047] 152. First limiter

[0048] 153. Import

[0049] 154. Export

[0050] 155. Top

[0051] 160. Seals DETAILED DESCRIPTION

[0052] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0053] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or components that are inherent to these processes, methods, products, or devices.

[0054] like Figure 1 and Figure 2 As shown, the electronic expansion valve of the embodiment of the present application includes a valve body 110, a sleeve 120 and a valve seat 150. The valve body 110 includes a connecting sleeve 112 and a connecting ring 113, the entire connecting ring 113 is sleeved around the connecting sleeve 112, and is fixedly connected to the connecting sleeve 112 to form a preassembled part; the sleeve 120 is fixedly connected to the connecting sleeve 112; the valve seat 150 has an installation cavity 151, at least part of the connecting sleeve 112 and at least part of the connecting ring 113 are located in the installation cavity 151, and the preassembled part is fixedly connected to the valve seat 150. Among them, "preassembled part" refers to an integral part formed by pre-assembling multiple parts or components together during the manufacturing process. In the embodiment of the present application, the connecting sleeve 112 and the connecting ring 113 are pre-assembled together to form an integral part.

[0055] In the electronic expansion valve of the embodiment of the present application, the valve body 110 includes a connecting sleeve 112 and a connecting ring 113 that are connected to each other. Before the valve body 110 is installed in the installation cavity 151 of the valve seat 150, the connecting sleeve 112 and the connecting ring 113 can be connected first, so that the connecting sleeve 112 and the connecting ring 113 form a preassembled component, which is convenient for storage and transportation, and also facilitates the valve body 110 to be installed in the installation cavity 151 of the valve seat 150.

[0056] The electronic expansion valve also includes a valve core assembly 130 and a coil assembly (not shown in the figure). The connecting sleeve 112 is connected to the sleeve 120 to form a chamber 140 for accommodating the valve core assembly 130. At least part of the coil assembly is sleeved on the outer periphery of the sleeve 120 and coupled to the valve core assembly 130. When the electronic expansion valve is working, by applying a pulse signal to the coil assembly, the valve core assembly 130 can be driven to move, thereby adjusting the opening of the valve port to achieve control of the fluid flow.

[0057] like Figure 1and Figure 2 As shown, the valve seat 150 has an inlet 153 and an outlet 154, and the inlet 153 and the outlet 154 are connected to the installation cavity 151. The inlet 153 is used for the fluid to flow into the installation cavity 151, and the outlet 154 is used for the fluid to flow out of the installation cavity 151.

[0058] like Figure 2 and Figure 3 As shown, the connecting sleeve 112 is connected to the sleeve 120 through the welding portion 114, and the connecting ring 113 is covered on the welding portion 114. In the embodiment of the present application, the connecting ring 113 is covered on the welding portion 114, that is, the welding portion 114 is located on the inner side of the connecting ring 113, and the connecting ring 113 protects the welding portion 114, thereby preventing external water vapor from flowing to the welding portion 114 and corroding the welding portion 114, thereby affecting the connection strength between the connecting sleeve 112 and the sleeve 120.

[0059] The outer periphery of the connecting sleeve 112 has a second limiting portion 112 c , and the sleeve 120 abuts against the second limiting portion 112 c .

[0060] In one embodiment, the second limiting portion 112c is a step structure, and the end surface of the sleeve 120 abuts against the step surface of the step structure.

[0061] like Figure 5 As shown, the valve seat 150 has a top surface 155 , and the mounting cavity 151 is formed by being recessed from the top surface 155 into the valve seat 150 along the axial direction of the valve core assembly 130 . Part of the sleeve 120 extends out of the top surface 155 , and the welding portion 114 is lower than the top surface 155 .

[0062] In the embodiment of the present application, the welding portion 114 formed by the sleeve 120 and the connecting sleeve 112 is lower than the top surface 155 of the valve seat 150 , which can reduce the overall height of the valve body 110 and further reduce the cost.

[0063] As an example, Figure 3 and Figure 4 As shown, the connecting ring 113 includes a ring body 113a and an annular portion 113b. The ring body 113a is fixedly connected to the valve seat 150 and is covered by the welding portion 114. The annular portion 113b is convexly arranged on the outer surface 113c of the ring body 113a and is sleeved on the outer periphery of the sleeve 120. The outer surface 113c is flush with the top surface 155. The inner circumference of the annular portion 113b can be flush with the inner circumference of the ring body 113a.

[0064] In other words, the ring body 113a is neither higher than the top surface 155 of the valve seat 150 nor lower than the top surface 155 of the valve seat 150. On the one hand, the consistency of the appearance of the valve seat 150 and the ring body 113a is improved; on the other hand, the formation of a space for storing impurities on the surface of the ring body 113a due to the ring body 113a being lower than the top surface 155 of the valve seat 150 is avoided.

[0065] As an example, the ring body 113 a is threadedly connected to the valve seat 150 .

[0066] It can be understood that the ring body 113a is threadedly connected to the valve seat 150, thereby forming a seal at the connection between the ring body 113a and the valve seat 150, thereby preventing external water vapor from entering the gap between the connecting ring 113 and the connecting sleeve 112 through the gap between the ring body 113a and the valve seat 150 and corroding the welding part 114.

[0067] like Figure 1 and Figure 4 As shown, a cut surface 113d is provided on the outer periphery of the annular portion 113b. The cut surface 113d can be used as a position for a wrench to clamp, so that when the connecting ring 113 is disassembled, the wrench can better apply force to the annular portion 113b.

[0068] like Figure 3 As shown, the cavity wall of the installation cavity 151 has a first limiting portion 152 , and the first limiting portion 152 can be abutted by the connecting sleeve 112 .

[0069] The first limiting portion 152 may be a step structure, and the connecting sleeve 112 abuts against the step surface of the step structure.

[0070] like Figure 3 and Figure 4 As shown, the connecting sleeve 112 includes a sleeve body 112a and a stop ring 112b. The sleeve body 112a is fixedly connected to the sleeve 120, and the outer periphery of the sleeve body 112a has a second limit portion 112c. The stop ring 112b is connected to the outer periphery of the sleeve body 112a and abuts against the first limit portion 152. The connecting ring 113 is sleeved on the outer periphery of the sleeve body 112a and presses against the stop ring 112b.

[0071] There is a gap between the outer circumferential surface of the stop ring 112b and the inner wall surface of the installation cavity 151. A seal 160 is provided between the portion of the sleeve body 112a that is not sleeved by the connecting ring 113 and the cavity wall of the installation cavity 151. When the connecting sleeve 112 is installed in the installation cavity 151 of the valve seat 150, the positioning of the installation axis of the connecting sleeve 112 is not determined by the contact between the stop ring 112b and the cavity wall of the valve seat 150, but by the seal 160 between the connecting sleeve 112 and the cavity wall of the installation cavity 151, which can reduce the processing accuracy of the stop ring 112b.

[0072] As an example, the ring body 113a is sleeved on the outer circumference of the sleeve body 112a and abuts against the stop ring 112b.

[0073] In one embodiment, the connecting ring 113 and the connecting sleeve 112 are separate structures, and the ring body 113a of the connecting ring 113 is interference fit with the sleeve body 112a of the connecting sleeve 112. Of course, in other embodiments, the ring body 113a and the sleeve body 112a can also be screwed or welded.

[0074] The connecting ring 113 is made of a first material, and the connecting sleeve 112 is made of a second material, and the first material is different from the second material. The connecting ring 113 and the connecting sleeve 112 are made of different materials, which can reduce the material cost of the valve body 110. For example, the connecting sleeve 112 is made of stainless steel, and the connecting ring 113 is made of aluminum.

[0075] In summary, the solenoid valve of the embodiment of the present application has at least the following advantages and beneficial effects:

[0076] In the electronic expansion valve of the embodiment of the present application, the valve body 110 includes a connecting sleeve 112 and a connecting ring 113 that are connected to each other. Before the valve body 110 is installed in the installation cavity 151 of the valve seat 150, the connecting sleeve 112 and the connecting ring 113 can be connected first, so that the connecting sleeve 112 and the connecting ring 113 form a preassembled component, which is convenient for storage and transportation, and also facilitates the valve body 110 to be installed in the installation cavity 151 of the valve seat 150.

[0077] It is understandable that the various embodiments / implementations provided in the present application can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0078] In the application embodiments, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the application embodiments can be understood according to the specific circumstances.

[0079] In the description of the application embodiments, it should be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the application embodiments.

[0080] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0081] The above are only preferred embodiments of the application embodiments and are not intended to limit the application embodiments. For those skilled in the art, the application embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application embodiments shall be included in the protection scope of the application embodiments.

Claims

1. An electronic expansion valve, characterized in that: include: The valve body (110) comprises a connecting sleeve (112) and a connecting ring (113), wherein the connecting ring (113) is entirely sleeved around the connecting sleeve (112) and is fixedly connected to the connecting sleeve (112) to form a preassembled component; The sleeve (120) is fixedly connected to the connecting sleeve (112).

2. The electronic expansion valve according to claim 1, characterized in that: Also includes: The valve seat (150) has an installation cavity (151), at least part of the connecting sleeve (112) and at least part of the connecting ring (113) are located in the installation cavity (151), and the preassembled component is fixedly connected to the valve seat (150).

3. The electronic expansion valve according to claim 2, characterized in that: The connecting sleeve (112) is connected to the sleeve (120) via a welding portion (114), and the connecting ring (113) is covered on the welding portion (114).

4. The electronic expansion valve according to claim 3, characterized in that: The valve seat (150) has a top surface (155), and the mounting cavity (151) is formed by being recessed from the top surface (155) into the valve seat (150); a portion of the sleeve (120) extends out of the top surface (155); The welding portion (114) is lower than the top surface (155).

5. The electronic expansion valve according to claim 4, characterized in that: The connecting ring (113) comprises a ring body (113a) and an annular portion (113b); the ring body (113a) is fixedly connected to the valve seat (150) and covers the welding portion (114); the annular portion (113b) is protruding from the outer surface (113c) of the ring body (113a) and sleeved on the outer periphery of the sleeve (120); The outer surface (113c) is flush with the top surface (155).

6. The electronic expansion valve according to claim 2, characterized in that: The connecting ring (113) and the connecting sleeve (112) are interference fit; and / or, The connecting ring (113) is threadedly connected to the valve seat (150).

7. The electronic expansion valve according to claim 2, characterized in that: The connecting ring (113) comprises a ring body (113a) and an annular portion (113b), wherein the ring body (113a) is fixedly connected to the valve seat (150), and the annular portion (113b) is protruding from the ring body (113a) and sleeved on the outer circumference of the sleeve (120); The outer periphery of the annular portion (113b) is provided with a cut surface (113d).

8. The electronic expansion valve according to claim 2, characterized in that: The cavity wall of the installation cavity (151) has a first limiting portion (152); The connecting sleeve (112) comprises a sleeve body (112a) and a stop ring (112b); the sleeve body (112a) is fixedly connected to the sleeve (120); the stop ring (112b) is connected to the outer periphery of the sleeve body (112a) and abuts against the first limiting portion (152); and the connecting ring (113) is sleeved on the outer periphery of the sleeve body (112a) and presses against the stop ring (112b).

9. The electronic expansion valve according to claim 8, characterized in that: There is a gap between the outer peripheral surface of the stop ring (112b) and the inner wall surface of the installation cavity (151).

10. The electronic expansion valve according to claim 8, characterized in that: A sealing member (160) is provided between the portion of the sleeve body (112a) not sleeved by the connecting ring (113) and the cavity wall of the installation cavity (151).

11. The electronic expansion valve according to claim 1, characterized in that: The connecting ring (113) is made of a first material, and the connecting sleeve (112) is made of a second material, wherein the first material is different from the second material.

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