Electronic expansion valve

Abstract

The present disclosure provides an electronic expansion valve, comprising a valve component and a coil component. The valve component comprises a valve body and a sleeve, the valve body and the sleeve being connected. The valve body comprises an annular portion, the annular portion being sleeved on an outer periphery of the sleeve. The coil component comprises a coil assembly and a sealing ring, at least a part of the coil assembly being sleeved on the outer periphery of the sleeve, and the sealing ring being fixedly disposed on the coil assembly, sleeved on an outer periphery of the annular portion, and sealed between the annular portion and the coil assembly.

Description

Electronic expansion valve

[0001] Cross-referencing

[0002] This disclosure claims priority to Chinese Patent Publication No. 202410684470.8, filed on May 29, 2024, entitled "Electronic Expansion Valve," and to Chinese Patent Publication No. 202421212175.4, filed on May 29, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of refrigeration control technology, and more specifically, to an electronic expansion valve. Background Technology

[0004] The electronic expansion valve in the related technology includes a valve component and a coil component. When in operation, a pulse signal is applied to the coil component to drive the valve core assembly of the valve component to move, thereby adjusting the opening of the valve port and realizing the control of fluid flow.

[0005] To prevent moisture or other impurities from entering the coil component through the assembly gap between the valve component and the coil component, thus causing corrosion or failure, a sealing ring is typically installed between the sleeve of the valve component and the coil component in related technologies. The sealing ring is interference-fitted with the sleeve. However, during the process of fitting the coil component onto the outer circumference of the sleeve, the sealing ring is continuously squeezed by the sleeve and the coil component, preventing air from escaping from the cavity between the coil component and the sleeve. This leads to inconvenient installation and affects assembly efficiency.

[0006] Public content

[0007] This application provides an electronic expansion valve to solve the problem of inconvenient installation of coil components and bushings in related technologies.

[0008] The electronic expansion valve of this application embodiment includes:

[0009] A valve component includes a valve body and a sleeve, the valve body and the sleeve being connected; the valve body has an annular portion that is sleeved around the outer periphery of the sleeve; and

[0010] A coil component includes a coil assembly and a sealing ring. At least a portion of the coil assembly is sleeved on the outer periphery of the sleeve. The sealing ring is fixedly disposed on the coil assembly and sleeved on the outer periphery of the annular portion, sealing between the annular portion and the coil assembly.

[0011] According to some embodiments of this application, the coil component further includes:

[0012] A limiting member is fixedly disposed on the coil assembly, and the sealing ring is limited between the limiting member and the coil assembly.

[0013] According to some embodiments of this application, the coil assembly has a bottom surface, and the limiting member is fixedly connected to the bottom surface; the coil assembly also has a recessed groove, which is recessed from the bottom surface along the axial direction of the electronic expansion valve toward the top of the coil assembly;

[0014] The sealing ring and the portion of the annular part surrounded by the sealing ring are both located within the sinking groove, and the sealing ring abuts against the bottom surface of the sinking groove and the limiting member.

[0015] According to some embodiments of this application, the sealing ring has a first annular rib on the side surface facing the limiting member, and the first annular rib abuts against the limiting member; and / or,

[0016] The sealing ring has a second annular rib on the side surface facing the coil assembly, and the second annular rib abuts against the coil assembly.

[0017] According to some embodiments of this application, the inner circumferential surface of the sealing ring is interference-fitted with the outer circumferential surface of the annular portion.

[0018] According to some embodiments of this application, the valve body includes:

[0019] Connecting sleeve, connected to the sleeve; and

[0020] A connecting ring is fixedly sleeved on the outer periphery of the connecting sleeve, and the connecting ring has the annular portion.

[0021] According to some embodiments of this application, the connecting sleeve and the sleeve are connected by a welding part, and the connecting ring covers the welding part.

[0022] According to some embodiments of this application, the connecting ring and the connecting sleeve are interference-fitted.

[0023] According to some embodiments of this application, the valve component further includes a valve seat having a mounting cavity; at least a portion of the connecting sleeve and at least a portion of the connecting ring are located within the mounting cavity, and the connecting ring is threadedly connected to the valve seat.

[0024] According to some embodiments of this application, the cavity wall of the mounting cavity has a second limiting portion;

[0025] The outer periphery of the connecting sleeve is provided with a stop portion that abuts against the second limiting portion; the connecting ring presses against the stop portion and has a gap with the second limiting portion.

[0026] According to some embodiments of this application, the connecting ring further includes a ring body located in the mounting cavity, the ring body being fixedly sleeved on the outer circumferential surface of the connecting sleeve and threadedly connected to the valve seat;

[0027] The annular portion protrudes from the surface of the ring body facing the coil assembly, and there is a gap between the inner circumferential surface of the annular portion and the outer circumferential surface of the sleeve.

[0028] According to some embodiments of this application, the annular portion further has an annular groove on the side opposite to the sleeve, and at least a portion of the sealing ring is located within the annular groove.

[0029] An embodiment of the above application has at least the following advantages or beneficial effects:

[0030] The electronic expansion valve of this application embodiment improves the sealing performance between the valve component and the coil component by providing a sealing ring between the annular portion and the coil assembly, preventing external moisture or impurities from entering the coil assembly and thus reducing the risk of corrosion of the coil assembly, thereby improving the working performance and service life of the coil assembly. On the other hand, the sealing ring is sleeved on the outer circumference of the annular portion without directly contacting the sleeve. Thus, during the process of sleeved on the outer circumference of the sleeve, the sealing ring will not come into contact with the sleeve, and there is a gap between the coil component and the sleeve for air to be discharged, thereby improving the installation efficiency of the electronic expansion valve. Attached Figure Description

[0031] Figure 1 shows a perspective view of the electronic expansion valve according to an embodiment of this application.

[0032] Figure 2 shows a cross-sectional view of an electronic expansion valve according to an embodiment of this application.

[0033] Figure 3 shows a magnified view of the area at X1 in Figure 2.

[0034] Figure 4 shows an exploded view of the coil component.

[0035] Figure 5 shows a partial cross-sectional view of the sealing ring.

[0036] Figure 6 shows a magnified view of the area at X2 in Figure 2.

[0037] Figure 7 shows a perspective view of an electronic expansion valve according to an embodiment of this application, wherein the coil assembly is omitted.

[0038] Figure 8 shows a cross-sectional view of an electronic expansion valve according to an embodiment of this application, wherein the coil assembly is omitted.

[0039] Figure 9 shows a magnified view of the area at X1 in Figure 8.

[0040] Figure 10 shows an exploded view of the connecting sleeve and the connecting ring.

[0041] Figure 11 shows a cross-sectional view of the welded section below the top surface.

[0042] The reference numerals in the attached drawings are explained as follows: 100, valve component; 110, valve body; 111, annular portion; 111a, annular groove; 112, connecting sleeve; 112a, first limiting portion; 112b, stop portion; 112d, sleeve body; 113, connecting ring; 113a, ring body; 113b, notch; 113c, outer surface; 113d, cut surface; 113e, annular portion; 114, welded portion; 120, sleeve; 130, valve core assembly; 140, chamber; 150, valve seat; 151, mounting cavity; 152, second limiting portion; 153, inlet; 154, outlet; 155, top surface; 160, seal; 200, coil component; 210, coil assembly; 211, bottom surface; 212, recessed groove; 220, sealing ring; 221, first annular rib; 222, second annular rib; 230, limiting component. Detailed Implementation

[0043] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0044] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0045] As shown in Figures 1 to 3, the electronic expansion valve of this embodiment includes a valve component 100 and a coil component 200. The valve component 100 includes a valve body 110, a sleeve 120, and a valve core assembly 130. The valve body 110 and the sleeve 120 are connected to form a chamber 140 for accommodating the valve core assembly 130. The valve body 110 has an annular portion 111, which is sleeved on the outer periphery of the sleeve 120. The coil component 200 includes a coil assembly 210 and a sealing ring 220. At least a portion of the coil assembly 210 is sleeved on the outer periphery of the sleeve 120. The coil assembly 210 is coupled to the valve core assembly 130. The sealing ring 220 is fixedly connected to the coil assembly 210 and is sleeved on the outer periphery of the annular portion 111, sealing between the annular portion 111 and the coil assembly 210.

[0046] The electronic expansion valve of this application embodiment improves the sealing performance between the valve component 100 and the coil component 200 by providing a sealing ring 220 between the annular portion 111 and the coil assembly 210, preventing external moisture or impurities from entering the coil assembly 210 and thus reducing the risk of corrosion of the coil assembly 210, thereby improving the working performance and service life of the coil assembly 210. On the other hand, the sealing ring 220 is sleeved on the outer periphery of the annular portion 111 and does not directly contact the sleeve 120. Thus, during the process of sleeved on the outer periphery of the sleeve 120, the sealing ring 220 will not come into contact with the sleeve 120, and there is a gap between the coil component 200 and the sleeve 120 for air to be discharged, thereby improving the installation efficiency of the electronic expansion valve.

[0047] The coil assembly 210 is coupled to the valve core assembly 130, so that when the electronic expansion valve is working, a pulse signal is applied to the coil assembly 210 to drive the valve core assembly 130 to move, thereby adjusting the opening of the valve port and realizing the control of fluid flow.

[0048] As shown in Figures 1 and 2, the valve component 100 further includes a valve seat 150, on which the valve body 110 is mounted. The valve seat 150 has a mounting cavity 151, within which at least a portion of the valve body 110 is located. The outer surface of the valve seat 150 has an inlet 153 and an outlet 154, which communicate with the mounting cavity 151.

[0049] Of course, in other embodiments, the electronic expansion valve may not include a valve seat 150, and the valve body 110 may be directly installed in the refrigeration system.

[0050] As shown in Figure 2, the valve body 110 includes a connecting sleeve 112 and a connecting ring 113. The connecting sleeve 112 is sealed and welded to the sleeve 120 to form a chamber 140; the connecting ring 113 is fixedly sleeved on the outer periphery of the connecting sleeve 112, and the connecting ring 113 has an annular portion 111. At least a portion of the connecting sleeve 112 and at least a portion of the connecting ring 113 are located within the mounting cavity 151, and the connecting ring 113 is threadedly connected to the valve seat 150.

[0051] It is understandable that the connecting ring 113 is threaded to the valve seat 150, thereby forming a seal at the connection between the connecting ring 113 and the valve seat 150. This prevents external moisture from entering the gap between the connecting ring 113 and the connecting sleeve 112 through the gap between the connecting ring 113 and the valve seat 150, and then flowing into the coil assembly 210.

[0052] The connecting sleeve 112 and the connecting ring 113 can be an integral structure or separate structures. When the connecting sleeve 112 and the connecting ring 113 are separate structures, the fixed connection method between the connecting ring 113 and the connecting sleeve 112 can be interference fit, screw connection, welding, etc.

[0053] As shown in Figures 2 and 3, the connecting sleeve 112 and the sleeve 120 are connected by a welded part 114, and the connecting ring 113 covers the welded part 114. In this embodiment of the application, the connecting ring 113 covers the welded part 114, that is, the welded part 114 is located inside the connecting ring 113. The sealing ring 220, the connecting ring 113, and the valve seat 150 protect the welded part 114, further preventing external moisture from flowing to the welded part 114 and causing corrosion.

[0054] The outer periphery of the connecting sleeve 112 has a first limiting part 112a, and the sleeve 120 abuts against the first limiting part 112a.

[0055] In one embodiment, the first limiting part 112a is a stepped structure, and the sleeve 120 abuts against the stepped surface of the stepped structure.

[0056] As shown in Figure 3, the connecting ring 113 also includes a ring body 113a located in the mounting cavity 151. The ring body 113a is fixedly sleeved on the outer circumferential surface of the connecting sleeve 112 and threadedly connected to the valve seat 150. The ring body 113a can be connected to the connecting sleeve 112 by means of interference fit, screw connection, welding, etc.

[0057] An annular portion 111 protrudes from the surface of the ring body 113a facing the coil assembly 210, and there is a gap between the inner circumferential surface of the annular portion 111 and the outer circumferential surface of the sleeve 120. When the connecting sleeve 112 and the connecting ring 113 are separate structures, the ring body 113a can be fixedly connected to the connecting sleeve 112 by an interference fit, and there is a clearance fit between the inner circumferential surface of the annular portion 111 and the outer circumferential surface of the sleeve 120. Therefore, the clearance can reduce the assembly difficulty between the connecting sleeve 112 and the connecting ring 113.

[0058] As an example, the surface of the ring body 113a facing the coil assembly 210 is flush with the outer surface of the valve seat 150. In other words, the ring body 113a is neither higher nor lower than the outer surface of the valve seat 150. On the one hand, this improves the consistency of appearance between the valve seat 150 and the ring body 113a; on the other hand, it avoids the formation of a space for storing impurities on the top surface of the ring body 113a if the ring body 113a is lower than the outer surface of the valve seat 150.

[0059] As shown in Figures 3 and 4, the coil component 200 also includes a limiting member 230, which is fixedly connected to the coil assembly 210 and limits the sealing ring 220 between the limiting member 230 and the coil assembly 210.

[0060] In one embodiment, the coil assembly 210 has a bottom surface 211 facing the valve seat 150, and the limiting member 230 is fixedly connected to the bottom surface 211; the coil assembly 210 also has a recessed groove 212, which is recessed from the bottom surface 211 along the axial direction of the valve core assembly 130 toward the top of the coil assembly 210; the sealing ring 220 and the portion of the annular portion 111 surrounded by the sealing ring 220 are both located in the recessed groove 212, and the sealing ring 220 abuts between the bottom surface of the recessed groove 212 and the limiting member 230.

[0061] In this embodiment of the application, the limiting member 230 limits the sealing ring 220 within the recessed groove 212 of the coil assembly 210, thereby reducing the volume of the electronic expansion valve along the axial direction of the valve core assembly 130.

[0062] In one embodiment, the inner circumferential surface of the sealing ring 220 is press-fitted with the outer circumferential surface of the annular portion 111. This press-fit ensures the strong connection between the sealing ring 220 and the annular portion 111, thereby guaranteeing the sealing performance of the sealing ring 220.

[0063] As shown in Figure 3, the annular portion 111 also has an annular groove 111a on the side facing away from the sleeve 120, and at least a portion of the sealing ring 220 is located within the annular groove 111a. In this embodiment, the inner circumferential surface of the sealing ring 220 is interference-fitted with the bottom surface of the annular groove 111a.

[0064] As shown in Figure 5, the sealing ring 220 has a first annular rib 221 on one side of its surface facing the limiting member 230. The first annular rib 221 surrounds the outer periphery of the sleeve 120 and abuts against the limiting member 230; and / or, the sealing ring 220 has a second annular rib 222 on one side of its surface facing the bottom surface of the recessed groove 212 of the coil assembly 210. The second annular rib 222 surrounds the outer periphery of the sleeve 120 and abuts against the bottom surface of the recessed groove 212 of the coil assembly 210.

[0065] In the embodiments of this application, the sealing ring 220 is provided with a first annular rib 221 and / or a second annular rib 222. When the annular rib is compressed, the sealing ring 220 can generate greater deformation. The deformation force drives the inner circumferential surface of the sealing ring 220 to become an arc shape. The arc-shaped sealing ring 220 seals with the annular portion 111, thereby improving the sealing performance of the sealing ring 220.

[0066] As shown in Figure 6, the cavity wall of the mounting cavity 151 has a second limiting portion 152, and the outer periphery of the connecting sleeve 112 is provided with a stop portion 112b that abuts against the second limiting portion 152. The ring body 113a of the connecting ring 113 presses against the stop portion 112b, and there is a gap between it and the second limiting portion 152.

[0067] It should be noted that during installation of the electronic expansion valve, the sleeve 120 can be connected to the connecting sleeve 112 first, for example by welding, and then the connecting ring 113 can be connected to the connecting sleeve 112 as a whole, for example by interference fit. Afterwards, the valve body 110 is installed into the mounting cavity 151 of the valve seat 150. Subsequently, the coil assembly 210 can be installed. During the installation of the coil assembly 210, the coil assembly 210 and the sleeve 120 are in a non-sealed state, allowing air in the cavity between the coil assembly 210 and the sleeve 120 to be discharged in a timely manner. Finally, the sealing ring 220 is installed to the outer circumference of the annular portion 111, sealing the space between the coil assembly 210 and the sleeve 120.

[0068] In this embodiment, the connecting ring 113 does not directly contact the second limiting part 152, while the stop part 112b of the connecting sleeve 112 abuts against the second limiting part 152. The advantage of this design is that when the valve body 110 is installed into the mounting cavity 151 of the valve seat 150, after the stop part 112b of the connecting sleeve 112 abuts against the second limiting part 152, the torque of the threaded structure of the connecting ring 113 and the valve seat 150 can reach the target value, ensuring that the connecting sleeve 112 is completely compressed by the connecting ring 113. This ensures the stability of the connection between the connecting sleeve 112, the connecting ring 113, and the valve seat 150, preventing the connecting sleeve 112 from loosening due to loosening of the threaded structure between the connecting ring 113 and the valve seat 150. The connecting ring 113 has a notch 113b on the side facing the second limiting part 152, and at least a portion of the stop part 112b is located within the notch 113b. If the connecting ring 113 is in direct contact with the second limiting part 152, the stop part 112b located in the notch 113b is prone to being not securely fixed or being squeezed and deformed.

[0069] In one embodiment, the second limiting part 152 is a stepped structure, and the stop part 112b abuts against the stepped surface of the stepped structure.

[0070] In summary, the electronic expansion valve of this application embodiment has at least the following advantages and beneficial effects:

[0071] The electronic expansion valve of this application embodiment improves the sealing performance between the valve component 100 and the coil component 200 by providing a sealing ring 220 between the annular portion 111 and the coil assembly 210, preventing external moisture or impurities from entering the coil assembly 210 and thus reducing the risk of corrosion of the coil assembly 210, thereby improving the working performance and service life of the coil assembly 210. On the other hand, the sealing ring 220 is sleeved on the outer periphery of the annular portion 111 and does not directly contact the sleeve 120. Thus, during the process of sleeved on the outer periphery of the sleeve 120, the sealing ring 220 will not come into contact with the sleeve 120, and there is a gap between the coil component 200 and the sleeve 120 for air to be discharged, thereby improving the installation efficiency of the electronic expansion valve.

[0072] This disclosure also relates to an electronic expansion valve, which includes a valve seat and a valve body. In related technologies, to facilitate the installation of the valve body on the valve seat, a pressure ring is usually fitted over the valve body. The pressure ring connects to the valve seat and simultaneously presses the valve body, thereby fixing the valve body to the valve seat. However, since the pressure ring and the valve seat have a clearance fit, during installation, the valve body must first be placed inside the valve seat before connecting the pressure ring and the valve seat. Therefore, before the valve body and pressure ring are installed, they are not fixed but can move relative to each other, leading to inconvenience in storage and transportation.

[0073] This application provides an electronic expansion valve to solve the problems of inconvenient storage and transportation in related technologies.

[0074] The electronic expansion valve of this application embodiment includes:

[0075] The valve body includes a connecting sleeve and a connecting ring, wherein the entire connecting ring is fitted around the connecting sleeve and is fixedly connected to the connecting sleeve to form a pre-assembled part;

[0076] The sleeve is fixedly connected to the connecting sleeve.

[0077] According to some embodiments of this application, it also includes:

[0078] A valve seat having a mounting cavity, at least a portion of the connecting sleeve and at least a portion of the connecting ring being located within the mounting cavity, and the pre-installed component being fixedly connected to the valve seat.

[0079] According to some embodiments of this application, the connecting sleeve and the sleeve are connected by a welding part, and the connecting ring covers the welding part.

[0080] According to some embodiments of this application, the valve seat has a top surface, and the mounting cavity is recessed into the valve seat from the top surface; a portion of the sleeve extends out from the top surface.

[0081] The welded portion is lower than the top surface.

[0082] According to some embodiments of this application, the connecting ring includes a ring body and an annular portion. The ring body is fixedly connected to the valve seat and covers the welded portion. The annular portion protrudes from the outer surface of the ring body and is sleeved on the outer periphery of the sleeve.

[0083] The outer surface is flush with the top surface.

[0084] According to some embodiments of this application, the connecting ring and the connecting sleeve are interference-fitted; and / or,

[0085] The connecting ring is threadedly connected to the valve seat.

[0086] According to some embodiments of this 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 protrudes from the ring body and is sleeved on the outer periphery of the sleeve.

[0087] The outer periphery of the annular portion has a cut surface.

[0088] According to some embodiments of this application, the cavity wall of the mounting cavity has a second limiting portion;

[0089] The connecting sleeve includes a sleeve body and a stop portion. The sleeve body is fixedly connected to the sleeve tube. The stop portion is connected around the outer periphery of the sleeve body and abuts against the second limiting portion. The connecting ring is sleeved on the outer periphery of the sleeve body and presses against the stop portion.

[0090] According to some embodiments of this application, there is a gap between the outer peripheral surface of the stop portion and the inner wall surface of the mounting cavity.

[0091] According to some embodiments of this application, a sealing element is provided between the portion of the sleeve body not covered by the connecting ring and the cavity wall of the mounting cavity.

[0092] According to some embodiments of this application, the connecting ring is made of a first material, and the connecting sleeve is made of a second material, wherein the first material and the second material are different.

[0093] An embodiment of the above application has at least the following advantages or beneficial effects:

[0094] The electronic expansion valve of this application embodiment includes a connecting sleeve and a connecting ring connected together. Before installing the valve body into the mounting cavity of the valve seat, the connecting sleeve and the connecting ring can be connected first. In this way, the connecting sleeve and the connecting ring form a pre-assembled part, which is convenient for storage and transportation, and also convenient for the valve body to be installed into the mounting cavity of the valve seat.

[0095] As shown in Figures 7 and 8, the electronic expansion valve of this embodiment 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 fitted around the connecting sleeve 112 and fixedly connected to it to form a pre-assembled component. The sleeve 120 is fixedly connected to the connecting sleeve 112. The valve seat 150 has a mounting cavity 151, where at least a portion of the connecting sleeve 112 and at least a portion of the connecting ring 113 are located. The pre-assembled component is fixedly connected to the valve seat 150. Here, "pre-assembled component" refers to a single integral part formed by pre-assembling multiple parts or components during the manufacturing process. In this embodiment, the connecting sleeve 112 and the connecting ring 113 are pre-assembled together to form a single integral part.

[0096] The electronic expansion valve of this application embodiment includes a valve body 110 comprising a connecting sleeve 112 and a connecting ring 113 connected together. Before installing the valve body 110 into the mounting 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 pre-assembled part, which is convenient for storage and transportation, and also convenient for the valve body 110 to be installed into the mounting cavity 151 of the valve seat 150.

[0097] The electronic expansion valve also includes a valve core assembly 130 and a coil assembly (not shown). A connecting sleeve 112 is connected to a sleeve 120 to form a chamber 140 for receiving the valve core assembly 130. At least a portion of the coil assembly is fitted around the outer periphery of the sleeve 120 and coupled to the valve core assembly 130. When the electronic expansion valve is in operation, applying a pulse signal to the coil assembly drives the valve core assembly 130 to move, thereby adjusting the valve opening and controlling the fluid flow rate.

[0098] As shown in Figures 7 and 8, the valve seat 150 has an inlet 153 and an outlet 154, which are connected to the mounting cavity 151. The inlet 153 is used to allow fluid to flow into the mounting cavity 151, and the outlet 154 is used to allow fluid to flow out of the mounting cavity 151.

[0099] As shown in Figures 8 and 9, the connecting sleeve 112 and the sleeve 120 are connected by a welding part 114, and the connecting ring 113 covers the welding part 114. In this embodiment of the application, the connecting ring 113 covers the welding part 114, that is, the welding part 114 is located inside the connecting ring 113. The connecting ring 113 protects the welding part 114, preventing external moisture from flowing to the welding part 114 and causing corrosion, thereby affecting the connection strength between the connecting sleeve 112 and the sleeve 120.

[0100] The outer periphery of the connecting sleeve 112 has a first limiting part 112a, and the sleeve 120 abuts against the first limiting part 112a.

[0101] In one embodiment, the first limiting part 112a is a stepped structure, and the end face of the sleeve 120 abuts against the stepped surface of the stepped structure.

[0102] As shown in Figure 11, the valve seat 150 has a top surface 155, and the mounting cavity 151 is recessed into the valve seat 150 from the top surface 155 along the axial direction of the valve core assembly 130. A portion of the sleeve 120 extends out of the top surface 155, and the welded portion 114 is lower than the top surface 155.

[0103] In this embodiment of the application, the welded 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 thus reduce the cost.

[0104] As an example, as shown in Figures 9 and 10, the connecting ring 113 includes a ring body 113a and an annular portion 113e. The ring body 113a is fixedly connected to the valve seat 150 and covers the welded portion 114. The annular portion 113e protrudes from the outer surface 113c of the ring body 113a and is fitted onto the outer periphery of the sleeve 120. The outer surface 113c is flush with the top surface 155. The inner circumferential surface of the annular portion 113e may be flush with the inner circumferential surface of the ring body 113a.

[0105] In other words, the ring body 113a is neither higher than nor lower than the top surface 155 of the valve seat 150. On the one hand, this improves the consistency of appearance between the valve seat 150 and the ring body 113a; on the other hand, it avoids the formation of a space for storing impurities on the surface of the ring body 113a because the ring body 113a is lower than the top surface 155 of the valve seat 150.

[0106] As an example, the ring body 113a is threadedly connected to the valve seat 150.

[0107] It is understandable that the ring body 113a is threaded to the valve seat 150, thereby forming a seal at the connection between the ring body 113a and the valve seat 150. This prevents external moisture from entering the gap between the ring body 113a and the valve seat 150 and corroding the welded part 114.

[0108] As shown in Figures 7 and 10, the outer periphery of the annular portion 113e is provided with a cut surface 113d. The cut surface 113d can serve as a wrench clamping position, so that the wrench can apply force to the annular portion 113e better when assembling or disassembling the connecting ring 113.

[0109] As shown in Figure 9, the cavity wall of the mounting cavity 151 has a second limiting part 152, which can be abutted by the connecting sleeve 112.

[0110] The second limiting part 152 can be a stepped structure, and the connecting sleeve 112 abuts against the stepped surface of the stepped structure.

[0111] As shown in Figures 9 and 10, the connecting sleeve 112 includes a sleeve body 112d and a stop portion 112b. The sleeve body 112d is fixedly connected to the sleeve 120, and the outer periphery of the sleeve body 112d has a first limiting portion 112a. The stop portion 112b is connected around the outer periphery of the sleeve body 112d and abuts against the second limiting portion 152. The connecting ring 113 is sleeved on the outer periphery of the sleeve body 112d and presses against the stop portion 112b.

[0112] There is a gap between the outer peripheral surface of the stop portion 112b and the inner wall surface of the mounting cavity 151. A sealing element 160 is provided between the portion of the sleeve body 112d not fitted by the connecting ring 113 and the cavity wall of the mounting cavity 151. When the connecting sleeve 112 is installed into the mounting cavity 151 of the valve seat 150, the positioning of the mounting axis of the connecting sleeve 112 is not determined by the contact between the stop portion 112b and the cavity wall of the valve seat 150, but by the sealing element 160 between the connecting sleeve 112 and the cavity wall of the mounting cavity 151, thus reducing the machining accuracy of the stop portion 112b.

[0113] As an example, the ring body 113a is fitted around the outer periphery of the sleeve body 112d and abuts against the stop portion 112b.

[0114] 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 and the sleeve body 112d of the connecting sleeve 112 are press-fitted. Of course, in other embodiments, the ring body 113a and the sleeve body 112d can also be screwed, welded, etc.

[0115] The connecting ring 113 is made of a first material, and the connecting sleeve 112 is made of a second material, which is different from the first material. Using different materials for the connecting ring 113 and the connecting sleeve 112 reduces the material cost of the valve body 110. For example, the connecting sleeve 112 could be made of stainless steel, and the connecting ring 113 could be made of aluminum.

[0116] In summary, the solenoid valve of this application embodiment has at least the following advantages and beneficial effects:

[0117] The electronic expansion valve of this application embodiment includes a valve body 110 comprising a connecting sleeve 112 and a connecting ring 113 connected together. Before installing the valve body 110 into the mounting 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 pre-assembled part, which is convenient for storage and transportation, and also convenient for the valve body 110 to be installed into the mounting cavity 151 of the valve seat 150.

[0118] It is understood that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described one by one here.

[0119] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0120] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0121] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0122] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. An electronic expansion valve characterized by, include: A valve component (100) includes a valve body (110) and a sleeve (120), the valve body (110) and the sleeve (120) being connected; the valve body (110) has an annular portion (111) which is sleeved around the outer periphery of the sleeve (120); and The coil component (200) includes a coil assembly (210) and a sealing ring (220), at least a portion of the coil assembly (210) being sleeved on the outer periphery of the sleeve (120); the sealing ring (220) is fixedly disposed on the coil assembly (210), and sleeved on the outer periphery of the annular portion (111), and sealing between the annular portion (111) and the coil assembly (210).

2. The electronic expansion valve according to claim 1, characterized in that The coil component (200) further includes: A limiting member (230) is fixedly disposed on the coil assembly (210), and the sealing ring (220) is limited between the limiting member (230) and the coil assembly (210).

3. The electronic expansion valve according to claim 2, characterized in that The coil assembly (210) has a bottom surface (211), and the limiting member (230) is fixedly connected to the bottom surface (211); the coil assembly (210) also has a recessed groove (212), which is recessed from the bottom surface (211) along the axial direction of the electronic expansion valve toward the top of the coil assembly (210); The sealing ring (220) and the portion of the annular portion (111) surrounded by the sealing ring (220) are both located within the sinking groove (212), and the sealing ring (220) abuts against the bottom surface of the sinking groove (212) and the limiting member (230).

4. The electronic expansion valve according to claim 2, wherein The sealing ring (220) has a first annular rib (221) on the side facing the limiting member (230), and the first annular rib (221) abuts against the limiting member (230); and / or, The sealing ring (220) has a second annular rib (222) on the side surface facing the coil assembly (210), and the second annular rib (222) abuts against the coil assembly (210).

5. The electronic expansion valve according to claim 1, wherein The inner circumferential surface of the sealing ring (220) is interference-fitted with the outer circumferential surface of the annular portion (111).

6. Electronic expansion valve according to any of claims 1 to 5, characterized in that The valve body (110) includes: A connecting sleeve (112) is connected to the sleeve (120); and A connecting ring (113) is fixedly sleeved on the outer periphery of the connecting sleeve (112), and the connecting ring (113) has the annular portion (111).

7. The electronic expansion valve according to claim 6, characterized in that The connecting sleeve (112) is connected to the sleeve (120) through a welding part (114), and the connecting ring (113) covers the welding part (114).

8. The electronic expansion valve according to claim 6, wherein The connecting ring (113) and the connecting sleeve (112) are interference-fitted.

9. The electronic expansion valve according to claim 6, wherein The valve component (100) further includes a valve seat (150) having a mounting cavity (151); at least a portion of the connecting sleeve (112) and at least a portion of the connecting ring (113) are located in the mounting cavity (151), and the connecting ring (113) is threadedly connected to the valve seat (150).

10. The electronic expansion valve according to claim 9, wherein The cavity wall of the mounting cavity (151) has a second limiting part (152); The outer periphery of the connecting sleeve (112) is provided with a stop (112b) that abuts against the second limiting part (152); the connecting ring (113) presses against the stop (112b) and has a gap with the second limiting part (152).

11. The electronic expansion valve according to claim 9, wherein The connecting ring (113) also includes a ring body (113a) located in the mounting cavity (151). The ring body (113a) is fixedly sleeved on the outer circumferential surface of the connecting sleeve (112) and threadedly connected to the valve seat (150). The annular portion (111) protrudes from the side surface of the ring body (113a) facing the coil assembly (210), and there is a gap between the inner circumferential surface of the annular portion (111) and the outer circumferential surface of the sleeve (120).

12. The electronic expansion valve according to any one of claims 1 to 5, characterized in that The annular portion (111) also has an annular groove (111a) on the side opposite to the sleeve (120), and at least a portion of the sealing ring (220) is located in the annular groove (111a).

13. An electronic expansion valve characterized by include: The valve body (110) includes a connecting sleeve (112) and a connecting ring (113), wherein the entire connecting ring (113) is fitted around the connecting sleeve (112) and is fixedly connected to the connecting sleeve (112) to form a pre-assembled part; The sleeve (120) is fixedly connected to the connecting sleeve (112).

14. The electronic expansion valve according to claim 13, wherein Also includes: A valve seat (150) has a mounting cavity (151), at least a portion of the connecting sleeve (112) and at least a portion of the connecting ring (113) are located in the mounting cavity (151), and the pre-installed component is fixedly connected to the valve seat (150).

15. The electronic expansion valve according to claim 14, wherein The connecting sleeve (112) is connected to the sleeve (120) through a welding part (114), and the connecting ring (113) covers the welding part (114).

16. The electronic expansion valve according to claim 15, wherein The valve seat (150) has a top surface (155), and the mounting cavity (151) is recessed into the valve seat (150) from the top surface (155); a portion of the sleeve (120) extends out of the top surface (155). The welded portion (114) is lower than the top surface (155).

17. The electronic expansion valve according to claim 16, wherein The connecting ring (113) includes a ring body (113a) and an annular portion (113e). The ring body (113a) is fixedly connected to the valve seat (150) and covers the welded portion (114). The annular portion (113e) protrudes from 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).

18. The electronic expansion valve of claim 14, wherein, The connecting ring (113) is press-fitted with the connecting sleeve (112); and / or, The connecting ring (113) is threadedly connected to the valve seat (150).

19. The electronic expansion valve of claim 14, wherein, The connecting ring (113) includes a ring body (113a) and an annular portion (113e). The ring body (113a) is fixedly connected to the valve seat (150). The annular portion (113e) protrudes from the ring body (113a) and is sleeved on the outer periphery of the sleeve (120). The outer periphery of the annular portion (113e) is provided with a cut surface (113d).

20. The electronic expansion valve of claim 14, wherein, The cavity wall of the mounting cavity (151) has a second limiting part (152); The connecting sleeve (112) includes a sleeve body (112d) and a stop portion (112b). The sleeve body (112d) is fixedly connected to the sleeve (120). The stop portion (112b) is connected around the outer periphery of the sleeve body (112d) and abuts against the second limiting portion (152). The connecting ring (113) is sleeved on the outer periphery of the sleeve body (112d) and presses against the stop portion (112b).

21. The electronic expansion valve of claim 20, wherein, There is a gap between the outer peripheral surface of the stop (112b) and the inner wall surface of the mounting cavity (151).

22. The electronic expansion valve according to claim 20, characterized in that, A sealing element (160) is provided between the portion of the sleeve body (112d) not covered by the connecting ring (113) and the cavity wall of the mounting cavity (151).

23. The electronic expansion valve according to claim 13, characterized in that, The connecting ring (113) is made of a first material, and the connecting sleeve (112) is made of a second material, the first material being different from the second material.

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