Electronic valve and refrigeration appliance

Abstract

This utility model discloses an electronic valve and a refrigeration device, relating to the field of refrigeration control technology. The electronic valve includes a valve body, a valve needle assembly, and a guide sleeve. The valve body has a valve cavity, a connecting port, and a valve port communicating with the valve cavity. The valve needle assembly includes a mounting base and a valve needle. The mounting base is fixedly connected to the valve body, and the valve needle movably passes through a mounting hole in the mounting base to open and close the valve port. The guide sleeve is fixedly installed inside the valve cavity, located on the side of the mounting base facing the valve port and spaced apart from the mounting base. The guide sleeve has a guide hole for the valve needle to pass through. By placing the guide sleeve on the side of the valve needle assembly near the valve port, not only is the movement of the valve needle guided, but the impact area of ​​the refrigerant on the valve needle head is also reduced, thereby reducing the vibration amplitude of the valve needle and thus reducing the resulting noise. The spaced arrangement between the guide sleeve and the mounting base makes the assembly of the guide sleeve independent of the positional accuracy of the valve needle assembly, simplifying the assembly process and reducing manufacturing difficulty.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration control technology, and in particular to an electronic valve and a refrigeration device. Background Technology

[0002] In existing electronic valve technology, significant refrigerant noise is often generated during throttling, especially noticeable when the indoor unit of the air conditioner is running. This noise primarily originates from the instability of the valve needle during its movement. When the valve needle moves towards the valve port and extends from the mounting hole of the mounting bracket, the refrigerant flows in at high speed through the connection port, impacting the valve needle and causing it to vibrate or shake. This dynamic response of the valve needle further induces instability in the refrigerant flow, resulting in considerable noise. This type of noise not only affects the performance of the electronic valve but also becomes a significant factor limiting the overall comfort of the air conditioning system. Therefore, effectively suppressing valve needle vibration and reducing throttling noise is one of the urgent technical challenges to be solved in current electronic valve design. Utility Model Content

[0003] The main purpose of this invention is to propose an electronic valve and a refrigeration device, which aims to solve the problem that the valve needle of the existing electronic valve is prone to generating noise during operation.

[0004] To achieve the above objectives, the electronic valve proposed in this utility model includes:

[0005] The valve body has a valve cavity, a communication port and a valve port communicating with the valve cavity;

[0006] A valve needle assembly includes a mounting base and a valve needle. The mounting base is fixedly connected to the valve body and has a mounting hole. The valve needle passes through the mounting hole and is movably disposed in directions approaching and away from the valve port to open and close the valve port; and...

[0007] A guide sleeve is fixedly installed inside the valve cavity. The guide sleeve is located on the side of the mounting base facing the valve port and is spaced apart from the mounting base. The guide sleeve has a guide hole for the valve needle to pass through.

[0008] In one embodiment, the guide hole has a chamfered edge at the end facing the mounting base.

[0009] In one embodiment, a sound-absorbing cavity is defined between the guide sleeve and the mounting base;

[0010] The guide sleeve is also provided with a silencing hole along its axial direction, and the silencing hole is connected to the silencing cavity.

[0011] In one embodiment, the valve body includes an upper valve seat and a lower valve seat that surround and form the valve cavity, the lower valve seat includes a bottom and an annular side portion, and the bottom portion is provided with the valve port;

[0012] The inner wall of the annular side portion is formed with an annular step portion, the annular step portion having an annular step surface facing the upper valve seat, and the guide sleeve is supported on the annular step surface.

[0013] In one embodiment, the annular side portion includes a first annular side portion and a second annular side portion arranged sequentially in a direction away from the annular step portion;

[0014] The inner wall of the first annular side portion is recessed relative to the inner wall of the second annular side portion to form a guide slope between the inner walls of the first annular side portion and the inner walls of the second annular side portion.

[0015] In one embodiment, the inner wall of the annular side portion includes a first annular mating surface, which extends from the annular stepped surface toward the side closer to the mounting base.

[0016] The guide sleeve includes a connecting body, which is supported on the annular stepped surface, and the outer wall of the connecting body is configured as a second annular mating surface that mates with the first annular mating surface.

[0017] The height of the first annular mating surface is h1, and the height of the second annular mating surface is h, where h < h1.

[0018] In one embodiment, the guide sleeve includes a connecting body located on the side of the annular stepped portion near the upper valve seat;

[0019] The outer wall of the connecting body is recessed with a material groove along its circumference. The material groove divides the connecting body into a first connecting body and a second connecting body disposed on both sides of the material groove. The first connecting body is disposed closer to the upper valve seat than the second connecting body, and the outer diameter of the first connecting body is set to be smaller than the outer diameter of the second connecting body.

[0020] In one embodiment, the outer periphery of the end of the first connecting body facing the upper valve seat is provided with a chamfer.

[0021] In one embodiment, the second connecting body is interference-fitted with the lower valve seat.

[0022] In one embodiment, the guide sleeve is welded to the valve body.

[0023] This utility model also proposes a refrigeration device, which includes an electronic valve, the electronic valve comprising:

[0024] The valve body has a valve cavity, a communication port and a valve port communicating with the valve cavity;

[0025] A valve needle assembly includes a mounting base and a valve needle. The mounting base is fixedly connected to the valve body and has a mounting hole. The valve needle passes through the mounting hole and is movably disposed in directions approaching and away from the valve port to open and close the valve port; and...

[0026] A guide sleeve is fixedly installed inside the valve cavity. The guide sleeve is located on the side of the mounting base facing the valve port and is spaced apart from the mounting base. The guide sleeve has a guide hole for the valve needle to pass through.

[0027] In one embodiment, the refrigeration equipment includes an air conditioner.

[0028] In the technical solution of this utility model, a guide sleeve is provided on the side of the valve needle assembly near the valve port. This not only guides the movement of the valve needle but also reduces the impact area of ​​the refrigerant on the valve needle head, thereby reducing the vibration amplitude of the valve needle and consequently reducing the noise generated. The spacing between the guide sleeve and the mounting base allows the assembly of the guide sleeve to be independent of the positional accuracy of the valve needle assembly, simplifying the assembly process and reducing manufacturing difficulty. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 A schematic diagram of an embodiment of the electronic valve provided by this utility model;

[0031] Figure 2 for Figure 1 A partial enlarged view of point A in one embodiment of the electronic valve;

[0032] Figure 3 for Figure 2 A magnified view of a section at point B in the middle;

[0033] Figure 4 for Figure 1 A partial enlarged view of point A in another embodiment of the electronic valve;

[0034] Figure 5 for Figure 4 A schematic diagram of the cross-section of the guide sleeve;

[0035] Figure 6 for Figure 1 A schematic diagram of the structure of the guide sleeve.

[0036] Explanation of icon numbers:

[0037] 100. Electronic valve; 1. Valve body; a. Valve cavity; b. Connecting port; c. Valve port; 11. Upper valve seat; 12. Lower valve seat; 121. Bottom; 122. Annular side; 1221. First annular side; 12211. First annular mating surface; 1222. Second annular side; 1223. Guide slope; 123. Annular step; 2. Valve needle assembly; 21. Mounting seat; 21a. Mounting hole; 22. Valve needle; 3. Guide sleeve; 30. Second annular mating surface; 31. First connecting body; 32. Second connecting body; 3a. Guide hole; 3b. Silencing hole; 3c. Material trough; a1. Silencing cavity.

[0038] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0040] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0041] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0042] In existing electronic valve technology, significant refrigerant noise is often generated during throttling, especially noticeable when the indoor unit of the air conditioner is running. This noise primarily originates from the instability of the valve needle during its movement. When the valve needle moves towards the valve port and extends from the mounting hole of the mounting bracket, the refrigerant flows in at high speed through the connection port, impacting the valve needle and causing it to vibrate or shake. This dynamic response of the valve needle further induces instability in the refrigerant flow, resulting in considerable noise. This type of noise not only affects the performance of the electronic valve but also becomes a significant factor limiting the overall comfort of the air conditioning system. Therefore, effectively suppressing valve needle vibration and reducing throttling noise is one of the urgent technical challenges to be solved in current electronic valve design.

[0043] This invention proposes an electronic valve designed to solve the problem of noise generated by the valve needle during operation in existing electronic valves.

[0044] Please see Figure 1 and Figure 2 In one embodiment of this utility model, the electronic valve 100 includes a valve body 1, a valve needle assembly 2, and a guide sleeve 3. The valve body 1 has a valve cavity a, a communication port b, and a valve port c communicating with the valve cavity a. The valve needle assembly 2 includes a mounting base 21 and a valve needle 22. The mounting base 21 is fixedly connected to the valve body 1. The mounting base 21 has a mounting hole 21a. The valve needle 22 passes through the mounting hole 21a and is movably arranged in the direction close to and away from the valve port c to open and close the valve port c. The guide sleeve 3 is fixedly installed in the valve cavity a. The guide sleeve 3 is located on the side of the mounting base 21 facing the valve port c and is spaced apart from the mounting base 21. The guide sleeve 3 has a guide hole 3a for the valve needle 22 to pass through.

[0045] It should be noted that when the electronic valve 100 is working, the refrigerant can enter the valve chamber a from the connection port b and flow out from the valve port c. Of course, in some application scenarios, the refrigerant can enter the valve chamber a from the valve port c and flow out from the connection port b. The following text mainly describes the scenario where the refrigerant enters the valve chamber a from the connection port b and flows out from the valve port c.

[0046] It should be noted that during actual operation, when the electronic valve 100 is energized, the valve needle 22 extends towards the valve port c under the drive of the driving mechanism. At this time, the head of the valve needle 22 passes sequentially through the mounting hole 21a on the mounting base 21, and further through the guide hole 3a in the guide sleeve 3 in front of it, finally approaching or leaving the valve port c to achieve the flow regulation function. During this process, the refrigerant from the connecting port b enters the valve chamber a at a certain flow rate and acts on the head region of the valve needle 22. Because the valve needle 22 is in motion and its head directly faces the refrigerant flow direction, the refrigerant will exert an impact force on the head of the valve needle 22. If the impact force is too large or unevenly distributed, it can easily cause vibration or shaking of the valve needle 22, thereby causing disturbance in the refrigerant flow and generating throttling noise.

[0047] In this embodiment, the guide sleeve 3 is located between the mounting base 21 and the valve port c, and has a central guide hole 3a. This guide hole 3a only needs to be approximately aligned with the movement axis of the valve needle 22. When the valve needle 22 extends, the guide sleeve 3 wraps around the stem of the valve needle 22 from the outer periphery, so that the head of the valve needle 22 is relatively shorter and exposed to refrigerant impact. The refrigerant mainly acts on a smaller area of ​​the valve needle 22 head, rather than the entire junction of the head and stem, thereby reducing the distribution range of the impact force and reducing the sensitivity of the valve needle 22 to refrigerant disturbances.

[0048] In addition, the guide sleeve 3 and the mounting base 21 are spaced apart, so that the guide sleeve 3 only needs to be connected and fixed to the valve body 1 during the assembly process, without having direct structural cooperation with other parts of the valve needle assembly 2 (such as the mounting base 21 or the valve needle 22).

[0049] Specifically, the valve body 1 is usually assembled from an upper valve seat 11 and a lower valve seat 12. The guide sleeve 3 is located inside the valve cavity a and is set on the lower valve seat 12. Its fixing method can be various forms such as sleeve connection, welding, snap-fit ​​or adhesive. The assembly process is simple and reliable.

[0050] Since there is a certain gap between the guide sleeve 3 and the valve needle assembly 2, it is only necessary to ensure that the guide hole 3a is basically aligned with the movement axis of the valve needle 22 during assembly, without pursuing extremely high coaxiality requirements. The size of the guide hole 3a can also be appropriately enlarged to accommodate the smooth movement of the valve needle 22 inside it. This not only reduces the machining accuracy requirements of the guide sleeve 3, but also improves its assembly tolerance.

[0051] In addition, the guide sleeve 3 does not need to take into account the connection or positioning relationship with the valve needle assembly 2 in its structural design, thus avoiding the complexity and manufacturing difficulty brought about by the traditional structure, which requires both the lower end to cooperate with the valve body 1 and the upper end to cooperate with the valve needle assembly 2.

[0052] In the technical solution of this utility model, by setting a guide sleeve 3 on the side of the valve needle assembly 2 near the valve port c, not only is the movement of the valve needle 22 guided, but the impact area of ​​the refrigerant on the head of the valve needle 22 is also reduced, thereby reducing the vibration amplitude of the valve needle 22 and thus reducing the noise generated therefrom. The spaced arrangement between the guide sleeve 3 and the mounting base 21 makes the assembly of the guide sleeve 3 independent of the positional accuracy of the valve needle assembly 2, simplifying the assembly process and reducing manufacturing difficulty.

[0053] Specifically, please refer to Figure 5 and Figure 6 In the guide hole 3a of the guide sleeve 3, a chamfer structure is provided on the edge of the hole facing the mounting base 21. The chamfer is located at the entrance end of the guide hole 3a, and is in the form of an inclined or rounded transition, and is provided around the edge of the guide hole 3a.

[0054] During the operation of the electronic valve 100, the valve needle 22 needs to reciprocate axially between the mounting hole 21a and the guide hole 3a. When the valve needle 22 extends from one side of the mounting base 21 toward the valve port c, its front end first enters the guide hole 3a of the guide sleeve 3. Because the inlet of the guide hole 3a is chamfered, the valve needle 22 can naturally align itself along the chamfered surface when entering the guide hole 3a, avoiding jamming or increased frictional resistance due to assembly deviation or movement offset.

[0055] Furthermore, this chamfered structure also helps improve assembly efficiency. During the assembly stage, there may be slight positional deviations between the valve needle assembly 2 and the guide sleeve 3. The chamfer provides a wider guide space for the valve needle 22 to enter the guide hole 3a, reducing assembly difficulty and improving the smoothness and consistency of assembly.

[0056] To further improve the noise reduction effect, please refer to Figure 3 and Figure 4 In another embodiment, a silencing cavity a1 is defined between the guide sleeve 3 and the mounting base 21; a silencing hole 3b is also provided on the guide sleeve 3 along its axial direction, and the silencing hole 3b is connected to the silencing cavity a1.

[0057] Understandably, the guide sleeve 3 has a silencing hole 3b along its axial direction, which extends through the height of the guide sleeve 3 and connects to the silencing cavity a1. When the refrigerant enters the valve cavity a from the connecting port b and flows to the valve port c, it passes through the silencing hole 3b on the guide sleeve 3 and enters the silencing cavity a1 area between the guide sleeve 3 and the mounting base 21. During this process, if the refrigerant contains air bubbles, especially larger ones, they will be "shorn" and refined into multiple smaller bubbles when flowing through the smaller silencing hole 3b. Because smaller bubbles are less likely to burst violently during subsequent flow or pressure changes, the noise caused by bubble bursting is reduced.

[0058] Furthermore, since the silencing hole 3b is located on the refrigerant flow channel, it can effectively treat air bubbles in the refrigerant without the need for additional complex structures, thus improving the overall noise reduction performance.

[0059] For more specific details, please refer to Figure 2 and Figure 3 In this embodiment, the valve body 1 includes an upper valve seat 11 and a lower valve seat 12 that surround and form the valve cavity a. The lower valve seat 12 includes a bottom 121 and an annular side portion 122. The bottom 121 is provided with the valve port c. The inner sidewall of the annular side portion 122 is formed with an annular step portion 123. The annular step portion 123 has an annular step surface facing the upper valve seat 11. The guide sleeve 3 is supported on the annular step surface.

[0060] During installation, the guide sleeve 3 is supported on the annular step surface. That is, by inserting the guide sleeve 3 from the top opening of the lower valve seat 12, it is allowed to fall naturally onto the annular step surface, thereby achieving the axial positioning of the guide sleeve 3.

[0061] Furthermore, the guide sleeve 3 is positioned on the side of the mounting base 21 facing the valve port c, and maintains a certain distance from the mounting base 21. The size of this distance does not depend on the machining accuracy of the mounting base 21 itself, but is determined by the relative position between the guide sleeve 3 and the annular step portion 123 in the lower valve seat 12. The guide sleeve 3 can be directly inserted from the top opening of the lower valve seat 12, sliding along the inner wall until it abuts against the annular step portion 123, thereby achieving its axial limiting and fixation.

[0062] Since the axial position of the guide sleeve 3 is determined by the annular step portion 123 of the lower valve seat 12, no additional positioning or adjustment components are required. Therefore, the overall structure is simple, easy to assemble, and highly consistent.

[0063] Furthermore, for ease of assembly of guide sleeve 3, please refer to... Figure 2 and Figure 3In this embodiment, the annular side portion 122 includes a first annular side portion 1221 and a second annular side portion 1222 arranged sequentially in a direction away from the annular step portion 123; the inner wall of the first annular side portion 1221 is recessed relative to the inner wall of the second annular side portion 1222 to form a guide slope 1223 between the inner wall of the first annular side portion 1221 and the inner wall of the second annular side portion 1222.

[0064] It is understandable that the annular side 122 of the lower valve seat 12 includes two structures with different inner diameters. The first annular side 1221 is located on the side close to the annular step 123, and its inner wall diameter is smaller, which is used to limit and position the guide sleeve 3. The second annular side 1222 is located on the side away from the annular step 123, and its inner wall diameter is relatively larger, forming a more spacious inlet area.

[0065] A transition structure, namely a guide slope 1223, is provided between the first annular side 1221 and the second annular side 1222. The guide slope 1223 gradually extends from the small diameter of the first annular side 1221 to the large diameter of the second annular side 1222.

[0066] When the guide sleeve 3 is inserted into the lower valve seat 12, it first enters the large space area of ​​the second annular side 1222. At this point, even if there is a certain assembly deviation, there will be no jamming or difficulty in insertion. As the guide sleeve 3 continues to move downward, its outer wall will contact the guide ramp 1223, and under the guidance of the ramp, it will gradually move towards the center, eventually smoothly entering the limiting position of the first annular side 1221, completing precise positioning.

[0067] This design not only enhances the fault tolerance during the assembly process but also improves the smoothness and consistency of the guide sleeve 3 installation.

[0068] Specifically, in this embodiment, the guide sleeve 3 is welded to the valve body 1. Fixing the guide sleeve 3 and the valve body by welding not only achieves a firm connection between the guide sleeve 3 and the valve body 1, but also provides excellent sealing performance, effectively preventing refrigerant leakage from the gap between the guide sleeve 3 and the valve body 1 during operation. Furthermore, the welding process can be selected from laser welding, resistance welding, or automatic brazing, depending on actual needs, to accommodate different materials and structural forms of the guide sleeve 3 and valve body 1.

[0069] For more specific details, please refer to Figure 3 In this embodiment, the inner wall of the annular side portion 122 includes a first annular mating surface 12211, which extends from the annular stepped surface toward the side close to the mounting base 21.

[0070] The guide sleeve 3 includes a connecting body supported on the annular step surface. The outer wall of the connecting body is configured as a second annular mating surface 30 that mates with the first annular mating surface 12211. The height of the first annular mating surface 12211 is h1, and the height of the second annular mating surface 30 is h, where h < h1.

[0071] It is understood that the annular side 122 of the lower valve seat 12 is provided with a first annular mating surface 12211, which is located on the inner side wall of the first annular side 1221 and is used to mate with the second annular mating surface 30 on the outer wall of the guide sleeve 3.

[0072] During assembly, the guide sleeve 3 is inserted through the top opening of the lower valve seat 12 and slides along the inner cavity to a predetermined position. The second annular mating surface 30 of its outer wall aligns and fits with the bottom of the first annular mating surface 12211 on the inner wall of the first annular side 1221. Subsequently, the guide sleeve 3 is fixedly connected to the annular side 122 through welding. The overall height of the guide sleeve 3 is h, while the height of the first annular mating surface 12211 is h1, satisfying the relationship: h < h1.

[0073] In other words, during welding, the height of the guide sleeve 3 is set to be less than the effective welding height within the inner wall of the first annular side 1221. This design ensures that the guide sleeve 3 is fully enclosed and fixed inside the first annular side 1221 during welding, resulting in a more robust and stable connection. Even under conditions of high-speed refrigerant flow or frequent opening and closing of the electronic valve 100, the guide sleeve 3 can be effectively prevented from loosening or shifting, ensuring its stable guiding effect on the valve needle 22.

[0074] Furthermore, for easier soldering of filler solder, please refer to [link / reference]. Figures 2 to 5 In this embodiment, the guide sleeve 3 includes a connecting body, which is located on the side of the annular step portion 123 near the upper valve seat 11. The outer side wall of the connecting body is recessed with a material groove 3c along its circumference. The material groove 3c divides the connecting body into a first connecting body 31 and a second connecting body 32 respectively disposed on both sides of the material groove 3c. The first connecting body 31 is disposed closer to the upper valve seat 11 than the second connecting body 32. The outer diameter of the first connecting body 31 is set to be smaller than the outer diameter of the second connecting body 32.

[0075] During assembly, the guide sleeve 3 is inserted into the lower valve seat 12 and positioned in the transition area between the first annular side 1221 and the second annular side 1222. Because the outer diameter of the first connecting body 31 is smaller, it leaves a larger gap with the inner wall of the lower valve seat 12; while the outer diameter of the second connecting body 32 is larger, and the gap between it and the inner wall of the lower valve seat 12 is relatively smaller.

[0076] When the guide sleeve 3 is welded and fixed, the solder first flows in from the larger gap between the first connecting body 31 and the lower valve seat 12, and flows downward along the outer wall of the guide sleeve 3. Subsequently, the solder enters the material groove 3c provided on the connecting body. This arrangement improves the welding reliability between the guide sleeve 3 and the valve body 1 without increasing the manufacturing difficulty.

[0077] Furthermore, in this embodiment, the outer periphery of the end of the first connecting body 31 facing the upper valve seat 11 is provided with a chamfer.

[0078] Understandably, the chamfer is located in the transition area between the first connecting body 31 and the inner wall of the lower valve seat 12, forming an inclined or smooth transition surface.

[0079] Specifically, during the welding process, the first connecting body 31 of the guide sleeve 3 is inserted into the lower valve seat 12 and forms a certain gap with the inner wall of the lower valve seat 12. Because this end is chamfered, the solder can flow more smoothly along the chamfered surface into the gap between the guide sleeve 3 and the valve seat when it flows in from this area, avoiding the problem of solder flow being blocked due to sharp edges or assembly deviations.

[0080] In addition, the presence of chamfers expands the effective space for solder entry, improving solder wettability and filling efficiency.

[0081] Specifically, please refer to Figure 2 In this embodiment, the second connecting body 32 is interference-fitted with the lower valve seat 12.

[0082] Specifically, during assembly, the guide sleeve 3 is inserted into the lower valve seat 12 and positioned by the fit between its outer wall and the inner wall of the lower valve seat 12. The outer diameter of the second connecting body 32 is slightly larger than the corresponding inner diameter of the lower valve seat 12, thus creating a certain degree of interference fit. This fit allows the guide sleeve 3 to generate a certain preload between itself and the lower valve seat 12 before welding, improving the stability of the initial assembly and preventing the guide sleeve 3 from shifting or shaking during subsequent operations.

[0083] The first connecting body 31 maintains a clearance fit with the lower valve seat 12 and serves as the main area for subsequent welding. After assembly, welding is performed on this area to form a firm and sealed fixed connection between the guide sleeve 3 and the valve body 1.

[0084] By setting an interference fit between the second connecting body 32 of the guide sleeve 3 and the lower valve seat 12, and combining it with the welding structure between the first connecting body 31 and the valve seat, a double fixing mechanism is achieved during the installation of the guide sleeve 3. Since the interference fit does not require additional structural components or complex process steps, the connection reliability between the guide sleeve 3 and the valve body 1 can be effectively enhanced without significantly increasing manufacturing costs.

[0085] This utility model also proposes a refrigeration device, which includes an air conditioner, a heat exchanger, and an electronic valve 100. The specific structure of the electronic valve 100 is as described in the above embodiments. Since this refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0086] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An electronic valve characterized by, include: The valve body has a valve cavity, a communication port and a valve port communicating with the valve cavity; A valve needle assembly includes a mounting base and a valve needle. The mounting base is fixedly connected to the valve body and has a mounting hole. The valve needle passes through the mounting hole and is movably disposed in directions approaching and away from the valve port to open and close the valve port; and... A guide sleeve is fixedly installed inside the valve cavity. The guide sleeve is located on the side of the mounting base facing the valve port and is spaced apart from the mounting base. The guide sleeve has a guide hole for the valve needle to pass through.

2. The electronic valve of claim 1, wherein The guide hole has a chamfered edge at the end facing the mounting base.

3. The electronic valve of claim 1, wherein, A sound-absorbing cavity is defined between the guide sleeve and the mounting base; The guide sleeve is also provided with a silencing hole along its axial direction, and the silencing hole is connected to the silencing cavity.

4. The electronic valve as described in claim 1, characterized in that, The valve body includes an upper valve seat and a lower valve seat that enclose the valve cavity. The lower valve seat includes a bottom and an annular side portion, and the bottom portion is provided with the valve port. The inner wall of the annular side portion is formed with an annular step portion, the annular step portion having an annular step surface facing the upper valve seat, and the guide sleeve is supported on the annular step surface.

5. The electronic valve as described in claim 4, characterized in that, The annular side portion includes a first annular side portion and a second annular side portion arranged sequentially in a direction away from the annular step portion; The inner wall of the first annular side portion is recessed relative to the inner wall of the second annular side portion to form a guide slope between the inner walls of the first annular side portion and the inner walls of the second annular side portion.

6. The electronic valve as described in claim 4, characterized in that, The inner wall of the annular side portion includes a first annular mating surface, which extends from the annular stepped surface toward the side closer to the mounting base. The guide sleeve includes a connecting body, which is supported on the annular stepped surface, and the outer wall of the connecting body is configured as a second annular mating surface that mates with the first annular mating surface. The height of the first annular mating surface is h1, and the height of the second annular mating surface is h, where h < h1.

7. The electronic valve as described in claim 4, characterized in that, The guide sleeve includes a connecting body, which is located on the side of the annular stepped portion near the upper valve seat; The outer wall of the connecting body is recessed with a material groove along its circumference. The material groove divides the connecting body into a first connecting body and a second connecting body disposed on both sides of the material groove. The first connecting body is disposed closer to the upper valve seat than the second connecting body, and the outer diameter of the first connecting body is set to be smaller than the outer diameter of the second connecting body.

8. The electronic valve as described in claim 7, characterized in that, The outer periphery of the end of the first connecting body facing the upper valve seat is chamfered.

9. The electronic valve as described in claim 7, characterized in that, The second connecting body is interference-fitted with the lower valve seat.

10. The electronic valve according to any one of claims 1 to 9, characterized in that, The guide sleeve is welded to the valve body.

11. A refrigeration device, characterized in that, Includes the electronic valve as described in any one of claims 1 to 10.

12. The refrigeration equipment as described in claim 11, characterized in that, The refrigeration equipment includes an air conditioner.

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