Electronic expansion valve and air conditioner

Abstract

The utility model discloses an electronic expansion valve and air conditioner relates to electronic expansion valve technical field, wherein the electronic expansion valve includes valve seat, connecting seat and communicating pipe, the valve seat is equipped with the mounting cavity, and with the cavity mouth and communicating port of mounting cavity respectively, the opening direction of cavity mouth is the axial direction of valve seat, and the communicating port is equipped with the mounting cavity. The communicating port is formed in the peripheral side wall of the valve seat; the connecting seat is in interference fit with the valve seat to block the cavity opening, a material melting cavity is formed between the valve seat and the connecting seat, and the material melting cavity is arranged close to the communicating opening and communicates with the mounting cavity; the communicating pipe is welded to the edge of the communicating opening, and the material melting cavity is used for containing welding flux. According to the technical scheme, the problem that welding flux flows to the position, where the connecting seat is installed, of the valve seat can be solved.

Description

Technical Field

[0001] This utility model relates to the field of electronic expansion valve technology, and in particular to an electronic expansion valve and an air conditioner. Background Technology

[0002] The electronic expansion valve utilizes the principle of a stepper motor, using a coil to drive the magnetic rotor component to rotate in both directions. This rotation is converted into the up-and-down movement of a lead screw, which in turn drives the valve needle connected to it to rise or fall, thus controlling the flow rate of the electronic expansion valve.

[0003] Currently, during the welding of the connecting pipe and valve seat of electronic expansion valves on the market, excess solder can seep into the valve seat and flow to the position on the valve seat where the connecting seat is installed. This can lead to improper assembly of the connecting seat and the valve seat, affecting the adjustment accuracy of the electronic expansion valve. Utility Model Content

[0004] The main purpose of this invention is to propose an electronic expansion valve that aims to solve the problem of solder that has seeped into the valve seat flowing to the position on the valve seat used for mounting the connector.

[0005] To achieve the above objectives, the electronic expansion valve proposed in this utility model includes:

[0006] A valve seat, wherein the valve seat has a mounting cavity, and a cavity opening and a connecting port respectively communicating with the mounting cavity, the opening direction of the cavity opening is the axial direction of the valve seat, and the connecting port is located on the peripheral sidewall of the valve seat;

[0007] A connecting seat, which is interference-fitted with the valve seat to seal the cavity opening, wherein a molten material chamber is provided between the valve seat and the connecting seat, the molten material chamber being located near the communication port and communicating with the mounting cavity; and

[0008] A connecting pipe is welded to the edge of the connecting port, and the molten material chamber is used to contain the solder.

[0009] In one embodiment, the melting chamber is disposed on the inner wall of the mounting chamber.

[0010] In one embodiment, the melting chamber is configured as a melting tank that opens toward the mounting chamber.

[0011] In one embodiment, the connecting seat has a connecting section that is interference-fitted with the valve seat, the distance between the end face of the connecting section near the communication port and the communication port is x1, and the distance between the side wall of the melting tank near the communication port and the communication port is x2, satisfying x1 > x2.

[0012] In one embodiment, the melting chamber is arranged in the form of an annular groove.

[0013] In one embodiment, the axial cross-section of the melting chamber is square.

[0014] In one embodiment, the radial depth h of the melt chamber is ≥0.2 mm.

[0015] In one embodiment, the axial width w of the melting chamber is ≥ 0.2 mm.

[0016] In one embodiment, the melting chamber and the connecting port are spaced apart.

[0017] In one embodiment, the connecting pipe is interference-fitted with the edge of the connecting port.

[0018] In one embodiment, the connecting pipe is made of metal.

[0019] In one embodiment, the connecting seat is welded to the valve seat.

[0020] This utility model also proposes an air conditioner, including the aforementioned electronic expansion valve.

[0021] The technical solution of this utility model involves setting a molten material chamber between the valve seat and the connecting seat, and positioning the molten material chamber close to the connecting port. This allows the molten material chamber to accommodate excess solder that seeps into the mounting cavity of the valve seat from the gap between the connecting port edge and the connecting pipe during welding of the connecting pipe and the connecting port edge. This prevents solder from flowing to the interference fit position between the valve seat and the connecting seat, thus avoiding solder interference with the installation of the connecting seat and ensuring proper installation of the connecting seat and valve seat. For example, it prevents solder from flowing to the interference fit position between the valve seat and the connecting seat, which could lead to improper installation of the connecting seat, tilting of the connecting seat relative to the valve seat, or deviation of the actual installation position of the connecting seat from the preset installation position. Therefore, this solution solves the problem of solder seeping into the valve seat flowing to the position on the valve seat intended for the connecting seat installation, thereby ensuring the assembly accuracy of the connecting seat and thus ensuring the assembly progress of the electronic expansion valve. Attached Figure Description

[0022] 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.

[0023] Figure 1 A cross-sectional structural schematic diagram of an embodiment of the electronic expansion valve provided by this utility model;

[0024] Figure 2 for Figure 1A magnified view of a section at point A in the middle;

[0025] Figure 3 for Figure 1 A cross-sectional structural diagram of the valve seat, connecting seat, and connecting pipe of the provided electronic expansion valve;

[0026] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0027] Figure 5 for Figure 1 A cross-sectional view of the valve seat and connecting pipe of the provided electronic expansion valve;

[0028] Figure 6 for Figure 5 A cross-sectional structural diagram.

[0029] Explanation of icon numbers:

[0030] 10. Electronic expansion valve; 100. Valve seat; 110. Mounting cavity; 120. Cavity opening; 130. Melting tank; 200. Connecting seat; 210. Connecting section; 300. Connecting pipe.

[0031] 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

[0032] 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.

[0033] 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.

[0034] 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.

[0035] The electronic expansion valve utilizes the principle of a stepper motor, using a coil to drive the magnetic rotor component to rotate in both directions. This rotation is converted into the up-and-down movement of a lead screw, which in turn drives the valve needle connected to it to rise or fall, thus controlling the flow rate of the electronic expansion valve.

[0036] Currently, during the welding of the connecting pipe and valve seat of electronic expansion valves on the market, excess solder can seep into the valve seat and flow to the position on the valve seat where the connecting seat is installed. This can lead to improper assembly of the connecting seat and the valve seat, affecting the adjustment accuracy of the electronic expansion valve.

[0037] To solve the above-mentioned technical problems, this utility model proposes an electronic expansion valve 10.

[0038] Please see Figures 1 to 3 In one embodiment of this utility model, the electronic expansion valve 10 includes a valve seat 100, a connecting seat 200, and a connecting pipe 300. The valve seat 100 is provided with a mounting cavity 110, and a cavity opening 120 and a connecting port respectively communicating with the mounting cavity 110. The opening direction of the cavity opening 120 is the axial direction of the valve seat 100, and the connecting port is provided on the peripheral side wall of the valve seat 100. The connecting seat 200 is interference-fitted with the valve seat 100 to seal the cavity opening 120. A molten material cavity is provided between the valve seat 100 and the connecting seat 200. The molten material cavity is located near the connecting port and communicates with the mounting cavity 110. The connecting pipe 300 is welded to the edge of the connecting port, and the molten material cavity is used to contain solder.

[0039] The technical solution of this utility model involves setting a molten cavity between the valve seat 100 and the connecting seat 200, and positioning the molten cavity close to the connecting port. This allows the molten cavity to accommodate excess solder that seeps into the mounting cavity of the valve seat 100 from the gap between the connecting port edge and the connecting pipe 300 during welding of the connecting pipe 300 and the edge of the connecting port. This prevents solder from flowing to the interference fit position between the valve seat 100 and the connecting seat 200, thus preventing solder from affecting the installation of the connecting seat 200 and ensuring proper installation of the connecting seat 200 and the valve seat 100. For example, this solution prevents solder from flowing into the position where the valve seat 100 and the connector 200 are overfitted, thus avoiding situations where the connector 200 is not installed correctly, the solder causes the connector 200 to tilt relative to the valve seat 100, or the actual installation position of the connector 200 deviates from the preset installation position. Therefore, this solution can solve the problem of solder penetrating into the valve seat 100 flowing into the position of the valve seat 100 used for the installation of the connector 200, thereby ensuring the assembly accuracy of the connector 200 and thus ensuring the assembly progress of the electronic expansion valve 10.

[0040] It is understood that the connector 200 has a through-hole for the valve needle to pass through. If the connector 200 is slightly tilted, the valve needle installed on the connector 200 will also tilt, resulting in a deviation in the accuracy of the valve needle's flow control, or the inability to close the valve port. If the actual installation position of the connector 200 deviates from the preset installation position, the actual installation position of the valve needle installed on the connector 200 will also deviate from the preset installation position, resulting in a deviation in the accuracy of the valve needle's flow control, or the inability to close the valve port. Therefore, this solution can ensure the assembly accuracy of the connector 200, thereby ensuring the assembly progress of the electronic expansion valve 10.

[0041] It should be noted that during the welding of the connecting pipe 300 and the valve seat 100, solder will penetrate into the mounting cavity 110 of the valve seat 100 from the gap between the edge of the connecting port and the connecting pipe 300, and then flow onto the inner wall of the mounting cavity 110. This solution addresses this by providing a molten cavity between the valve seat 100 and the connecting seat 200, and positioning the molten cavity close to the connecting port. This allows solder to flow into the mounting cavity 110 of the valve seat 100 during welding of the connecting pipe 300 and the edge of the connecting port, preventing solder from flowing to the interference fit between the connecting seat 200 and the valve seat 100. It can be understood that the interference fit between the valve seat 100 and the connecting seat 200 is located on the side of the molten cavity furthest from the connecting port.

[0042] Reference Figures 4 to 6Optionally, the molten metal chamber is located on the inner wall of the mounting cavity 110. This allows the solder to remain in the molten metal chamber before the connecting seat 200 is installed, even if the connecting pipe 300 is welded to the valve seat 100 first. This prevents the solder from affecting the installation of the connecting seat 200. Conversely, if the connecting seat 200 is installed on the valve seat 100 first, and then the connecting pipe 300 is welded, the solder can still flow into the molten metal chamber, thus preventing it from affecting the installation of the connecting seat 200. However, this solution is not limited to this. In the second embodiment, the valve seat 100 may have a first molten metal recess, and the connecting seat 200 may have a second molten metal recess. The first and second molten metal recesses overlap, forming a molten metal chamber between the valve seat 100 and the connecting seat 200, which can also accommodate excess solder. Of course, this solution is not limited to this. In the third embodiment, the molten cavity can also be located on the connecting seat 200. In this way, the molten metal during welding can also flow into the molten cavity without affecting the installation of the valve seat 100 and the connecting seat 200. The molten cavity on the connecting seat 200 has an opening facing the peripheral side wall of the valve seat 100 and a molten groove opening in the direction away from the cavity opening. That is, the molten groove has openings on both sides. In this way, even if the connecting pipe 300 is welded first and then the connecting seat 200 is installed, the molten groove can still allow the solder to avoid the opening during the installation of the connecting seat 200. Of course, the molten cavity on the connecting seat 200 can also only have a molten groove opening in the direction away from the cavity opening. In this case, the connecting seat 200 can be installed first and then the connecting pipe 300 is welded. In this way, the solder during welding can flow into the molten groove of the connecting seat 200 through the opening of the molten groove, thereby avoiding the solder affecting the assembly accuracy of the valve seat 100 and the connecting seat 200.

[0043] Optionally, the molten cavity is configured as a molten trough 130 opening towards the mounting cavity 110. This type of molten cavity is simple to manufacture, and the opening between the molten cavity and the mounting cavity 110 is larger, facilitating the flow of solder into the molten cavity. However, this solution is not limited to this. In the second embodiment, the molten cavity can also be configured as a closed molten cavity, with an inlet only located near the connecting port, allowing solder to enter the molten cavity through the inlet. Of course, this solution is not limited to this. In the third embodiment, the molten cavity can also be configured as a molten trough opening towards the connecting port; that is, the molten cavity opens in a direction away from the cavity opening 120 and is connected to the connecting port.

[0044] Reference Figure 2Optionally, in this embodiment, the connecting seat 200 has a connecting section 210 that is interference-fitted with the valve seat 100. The distance between the end face of the connecting section 210 near the communication port and the communication port is x1, and the distance between the side wall of the molten metal tank 130 near the communication port and the communication port is x2, satisfying x1 > x2. It can be understood that the molten metal chamber is configured as a molten metal tank 130 opening towards the mounting cavity 110, and x1 > x2. This ensures that the bottom side of the molten metal tank is connected to the mounting cavity 110, thereby ensuring that the solder can flow into the molten metal tank. Of course, this solution is not limited to this. In other embodiments, the side wall of the molten metal tank facing the communication port is connected to the communication port, that is, x2 = 0, and x1 > x2 may not be satisfied.

[0045] Optionally, the melting chamber is arranged in the form of an annular groove. Specifically, the melting chamber is arranged around the peripheral sidewall of the valve seat 100. This allows for an increase in the capacity of the melting chamber while maintaining the interference fit area between the valve seat 100 and the connecting seat 200, thus ensuring the installation stability of the connecting seat 200 and the valve seat 100, given a fixed volume of the valve seat 100. Of course, this solution is not limited to this; in other embodiments, the melting chamber may also be an arc-shaped groove or an annular groove arranged around the communication opening.

[0046] Furthermore, the axial cross-section of the melting chamber is square, which increases the volume of the melting chamber within the limited axial width of the valve seat 100. Of course, this solution is not limited to this; in other embodiments, the axial cross-section of the melting chamber may also be arc-shaped or hemispherical.

[0047] Reference Figure 4 Optionally, the radial depth h of the melt chamber is ≥0.2mm to ensure the volume of the melt chamber.

[0048] Furthermore, the axial width w of the melting chamber is ≥0.2mm, which ensures the volume of the melting chamber.

[0049] Optionally, the molten cavity and the connecting port are spaced apart, which can also be understood as the molten trough 130 and the connecting port being spaced apart. This ensures the width of the sidewall of the connecting port, thereby ensuring the strength of the sidewall at the connecting port, while also accommodating excess solder, thus preventing the solder from affecting the installation of the connector 200. Of course, this solution is not limited to this. In other embodiments, the molten cavity may not be spaced apart from the connecting port, that is, the molten cavity and the connecting port are directly connected.

[0050] Furthermore, the connecting pipe 300 is interference-fitted with the edge of the connecting port. This means that in this embodiment, the connecting pipe 300 is first interference-fitted with the edge of the connecting port, and then the connecting pipe 300 and the valve seat 100 are welded together. This ensures the installation strength of the connecting pipe and the valve seat 100. Of course, this solution is not limited to this. In other embodiments, the connecting pipe 300 can also be inserted into the connecting port, and then the connecting pipe 300 and the valve seat 100 can be welded together.

[0051] Optionally, the connecting pipe 300 is made of metal. This is because the yield strength and compressive strength of metal pipes (especially copper pipes) are much higher than those of plastic pipes, enabling them to withstand the pulse pressure on the high-pressure side of the refrigeration system (such as pressure fluctuations during compressor start-up and shutdown) and long-term high-pressure operating environments, reducing the risk of bursting or leakage. Moreover, metal pipes are less prone to deformation or breakage under system vibration or external impact, ensuring long-term reliability. Secondly, the high thermal conductivity of metal helps the refrigerant to quickly release or absorb heat during flow, reducing local overheating / undercooling and improving the heat exchange efficiency of the evaporator and condenser. Metal pipes can also help balance the pipe temperature, reducing superheat fluctuations before and after the electronic expansion valve 10 and improving control accuracy. Of course, this solution is not limited to this; in other embodiments, the connecting pipe 300 can also be made of plastic.

[0052] Furthermore, in this embodiment, the connecting pipe 300 is made of copper. This is because during refrigerant flow, copper pipes can quickly balance the temperature, reducing localized overcooling or overheating and improving the heat exchange efficiency of the evaporator and condenser. Moreover, the high thermal conductivity of copper pipes helps to stabilize the refrigerant temperature before and after the electronic expansion valve 10, thereby improving control accuracy and reducing system energy efficiency losses. The rigid structure of the copper pipes effectively absorbs compressor and pipeline vibrations, reducing vibration transmission to the electronic expansion valve 10 and preventing valve body wear or noise amplification. Of course, this solution is not limited to this; in other embodiments, the connecting pipe 300 can also be made of stainless steel.

[0053] Optionally, the connecting seat 200 is welded to the valve seat 100. Welding can improve the connection stability between the connecting seat 200 and the valve seat 100.

[0054] Furthermore, in this embodiment, the connecting seat 200 and the valve seat 100 are first interference-fitted, and then the connecting seat 200 and the valve seat 100 are welded together.

[0055] The specific method for welding the connecting seat 200 and the valve seat 100 is laser welding.

[0056] This utility model also proposes an air conditioner, which includes an electronic expansion valve. The specific structure of the electronic expansion valve is as described in the above embodiments. Since this air conditioner 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.

[0057] 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 expansion valve, characterized in that, include: A valve seat, wherein the valve seat has a mounting cavity, and a cavity opening and a connecting port respectively communicating with the mounting cavity, the opening direction of the cavity opening is the axial direction of the valve seat, and the connecting port is located on the peripheral sidewall of the valve seat; A connecting seat, which is interference-fitted with the valve seat to seal the cavity opening, wherein a molten material chamber is provided between the valve seat and the connecting seat, the molten material chamber being located near the communication port and communicating with the mounting cavity; and A connecting pipe is welded to the edge of the connecting port, and the molten material chamber is used to contain solder.

2. The electronic expansion valve as described in claim 1, characterized in that, The melting chamber is located on the inner wall of the mounting chamber.

3. The electronic expansion valve as described in claim 2, characterized in that, The melting chamber is configured as a melting tank that opens toward the mounting chamber.

4. The electronic expansion valve as described in claim 3, characterized in that, The connecting seat has a connecting section that is interference-fitted with the valve seat. The distance between the end face of the connecting section near the communication port and the communication port is x1, and the distance between the side wall of the melting tank near the communication port and the communication port is x2, satisfying x1 > x2.

5. The electronic expansion valve as described in claim 4, characterized in that, The melting chamber is arranged in the form of an annular groove.

6. The electronic expansion valve as described in claim 5, characterized in that, The axial cross-section of the melting chamber is square.

7. The electronic expansion valve as described in claim 5, characterized in that, The radial depth h of the melting chamber is ≥0.2 mm.

8. The electronic expansion valve as described in claim 7, characterized in that, The axial width w of the melting chamber is ≥0.2mm.

9. The electronic expansion valve according to any one of claims 1 to 8, characterized in that, The melting chamber and the connecting port are spaced apart.

10. The electronic expansion valve according to any one of claims 1 to 8, characterized in that, The connecting pipe is interference-fitted with the edge of the connecting port.

11. The electronic expansion valve as described in claim 10, characterized in that, The connecting pipe is made of metal.

12. The electronic expansion valve according to any one of claims 1 to 8, characterized in that, The connecting seat is welded to the valve seat.

13. An air conditioner, characterized in that, Includes the electronic expansion valve as described in any one of claims 1 to 12.

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