Valve body assembly, electronic expansion valve and refrigeration equipment

Abstract

The present invention discloses a valve body assembly, an electronic expansion valve, and a refrigeration device. The valve body assembly includes a valve seat and a valve core seat. The valve seat has a valve cavity and a mounting hole. The valve core seat is mounted in the mounting hole and defines a valve port communicating with the valve cavity. A first recess is formed on the outer wall of the valve core seat to form a first passage for solder to enter between the valve core seat and the inner wall of the mounting hole. The valve body assembly of the present invention has high welding strength, effectively improving product reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control components, and in particular to a valve body assembly, an electronic expansion valve and a refrigeration device. Background Art

[0002] An electronic expansion valve is an electromagnetically controlled component used in industrial control systems to control the flow of a medium or adjust parameters such as the flow rate, thereby achieving the desired control. In air conditioners, refrigerators, heat pump water heaters, and various refrigeration systems, electronic expansion valves are used to regulate the cooling capacity entering the evaporator, supplying the optimal amount of refrigerant to the evaporator to ensure stable operation of the refrigeration system. Existing electronic expansion valve structures suffer from poor weld strength between the valve seat core and the valve seat. When high pressure is passed through the side connecting pipe connected to one side of the valve seat and low pressure is passed through the lower connecting pipe connected to the lower end of the valve seat, the valve seat and the housing form a closed chamber, and the valve core seat is subjected to a large downward air pressure, which poses a risk of the valve core seat falling off and leaking. Summary of the Invention

[0003] The main purpose of the present invention is to provide a valve body assembly, which aims to solve the problem of potential risks of valve core seat falling off and leaking.

[0004] To achieve the above objectives, the valve body assembly disclosed in the present invention includes:

[0005] a valve seat having a valve cavity and a mounting hole; and

[0006] A valve core seat is installed at the installation hole, and the valve core seat is provided with a valve port communicating with the valve cavity;

[0007] The outer wall surface of the valve core seat is provided with a first recessed portion so that a first channel for solder to enter is formed between the valve core seat and the inner wall surface of the mounting hole.

[0008] In one embodiment, the valve core seat has an outer circular surface and an end plane, the outer circular surface faces the inner wall surface of the mounting hole, the end plane is perpendicular to the axial direction of the mounting hole, and the outer circular surface is provided with the first recess, which extends to the end plane of the valve core seat.

[0009] In one embodiment, the outer circular surface is interference fit with the inner wall surface of the mounting hole.

[0010] In one embodiment, there are multiple first recesses, and the multiple first recesses are evenly distributed along the outer circumferential surface of the valve core seat.

[0011] In one embodiment, the outer circumferential surface of the valve core seat is further provided with an annular protrusion, and the inner wall surface of the mounting hole is concavely provided with a docking groove corresponding to the annular protrusion. The annular protrusion and the docking groove are loosely matched to form a first gap for solder to enter.

[0012] In one embodiment, the annular protrusion has a docking surface perpendicular to the axial direction of the mounting hole, and one of the docking surface and / or the bottom wall of the docking groove is provided with a second recess to form a second channel for solder to enter between the valve core seat and the valve seat, and the second channel is connected to the first channel.

[0013] In one embodiment, the valve body assembly further includes a first conducting tube connected to an end of the valve core seat facing away from the valve cavity, and a second gap is formed between the first conducting tube and the inner wall surface of the mounting hole.

[0014] In one embodiment, the valve core seat includes a body and a connecting portion, the body has the outer circular surface and the end plane, the connecting portion is connected to the end plane of the body facing away from the valve cavity, the first conducting tube is sleeved on the connecting portion, and the second gap is connected to the first channel.

[0015] In one embodiment, an opening edge of the mounting hole away from the valve cavity is chamfered; and / or,

[0016] The end of the first conducting tube facing the mounting hole is chamfered.

[0017] The present invention also discloses an electronic expansion valve, which includes a coil assembly and a valve body assembly of any of the above embodiments. The coil assembly forms an installation cavity, and one end of the valve body assembly away from the valve seat is installed in the installation cavity.

[0018] The present invention further discloses a refrigeration device, comprising the electronic expansion valve as described above.

[0019] The valve body assembly of the technical solution of the present invention includes a valve seat and a valve core seat. The valve seat is provided with a mounting hole for the valve core seat to be installed. The valve core seat is installed at the mounting hole, and a first recess is provided on the outer wall surface, thereby forming a first channel between the valve core seat and the inner wall surface of the mounting hole. When welding, solder can be allowed to flow into the first channel, improving the fluidity of the welding material and increasing the welding connection area between the valve seat and the valve core seat, thereby effectively improving the welding strength of the valve core seat and the valve seat, so that the structural stability of the valve body assembly is good, and the risk of the valve core seat being detached and leaking is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 A cross-sectional view of an embodiment of a valve body assembly of the present invention;

[0022] Figure 2 for Figure 1 A cross-sectional view of a portion of the structure of the valve body assembly shown;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 for Figure 1 a cross-sectional view of the valve seat in the valve body assembly shown;

[0025] Figure 5 for Figure 1 Schematic diagram of the structure of the valve core seat in the valve body assembly shown.

[0026] Description of Figure Numbers:

[0027] 100 Valve body assembly 311 Outer cylindrical surface 100a First Channel 3111 first recess 100b Second channel 313 End plane 100c Second gap 33 Ring-shaped protrusion 10 valve seat 331 docking surface 10a Valve cavity 3311 second recess 11 Mounting holes 333 mating surface 13 Docking slot 35 Connection 20 Valve needle assembly 50 The first conduction tube 30 Valve core seat 70 The second conduction tube 30a Valve port 80 Cover 31 Ontology 90 rotor

[0028] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship and movement status of various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The present invention provides a valve body assembly 100 for use in an electronic expansion valve.

[0034] Please refer to Figures 1 to 5 In one embodiment of the present invention, the valve body assembly 100 includes:

[0035] A valve seat 10 having a valve cavity 10a and a mounting hole 11 formed at the bottom of the valve cavity 10a; and

[0036] A valve core seat 30 is installed at the mounting hole 11 and defines a valve port 30a communicating with the valve cavity 10a;

[0037] A first recess 3111 is defined on an outer wall of the valve core seat 30 , so as to form a first passage 100 a between the valve core seat 30 and an inner wall of the mounting hole 11 .

[0038] In this embodiment, the valve body assembly 100 includes a cover 80, a rotor 90, a valve needle assembly 20, a valve seat 10, a valve core seat 30, a first guide tube 50, and a second guide tube 70. The valve seat 10 defines a valve cavity 10a. The cover 80 and valve seat 10 are joined to form a sealed cavity, thereby providing the necessary space for the rotor 90, valve needle assembly 20, and valve core seat 30 located therein. To mount the valve core seat 30, the valve seat 10 defines a mounting hole 11 in the wall of the valve cavity 10a. The shape of this mounting hole 11 matches the external shape of the valve core seat 30, thereby facilitating a stable connection. The valve core seat 30 defines a valve port 30a that communicates with the valve cavity 10a, or rather, the cavity. This port 30a extends through the valve core seat 30. The valve needle assembly 20 extends vertically, with one end inserted into the port 30a to seal it. The other end is connected to the rotor 90 via a transmission mechanism. The first conduit 50 is connected to the side of the valve seat 10, and the second conduit 70 is connected to the lower end of the valve seat 10 or the valve core seat 30. In this manner, fluid enters the cavity from the first conduit 50 and flows through the port 30a to the second conduit 70. The rotor 90 rotates under the influence of a magnetic field, thereby driving the valve needle assembly 20 in vertical linear motion, closing or opening the port 30a and thereby controlling the flow rate at the port 30a. The vertical and horizontal references herein are merely for reference purposes only and are for illustrative purposes only. They should not be construed as limiting the operating environment or structure of the valve body assembly 100.

[0039] It is understandable that the above-mentioned components such as the rotor 90, the valve needle assembly 20 and the cover 80 are only introduced to facilitate those skilled in the art to understand the working principle of the electronic expansion valve, and are not intended to limit or improve the above-mentioned components.

[0040] At the same time, a first recess 3111 is provided on the outer wall surface of the valve core seat 30 so that a first channel 100a is formed between the valve core seat 30 and the inner wall surface of the mounting hole 11. Here, the first recess 3111 can be a groove structure having an opening toward the inner wall surface of the mounting hole 11, or a groove opening in two directions, which is not limited here. In the vertical direction, the first recess 3111 needs to be arranged relative to the inner wall surface of the mounting hole 11, so that a first channel 100a is formed between the valve core seat 30 and the inner wall surface of the mounting hole 11. It can be understood that the first channel 100a can be a linear structure, or it can have a corner structure, such as an L-shape, or a "J" shape, etc., which is not limited here. As long as it can be connected to the outside world through the gap, solder can be allowed to enter during welding.

[0041] The valve body assembly 100 of the technical solution of the present invention includes a valve seat 10 and a valve core seat 30. The valve seat 10 is provided with a mounting hole 11 for the valve core seat 30 to be installed. The valve core seat 30 is installed at the mounting hole 11, and a first recess 3111 is provided on its outer wall surface, so that a first channel 100a is formed between the first recess 3111 and the inner wall surface of the mounting hole 11. When welding, solder can be allowed to flow into the first channel 100a, thereby improving the fluidity of the welding material and increasing the welding connection area between the valve seat 10 and the valve core seat 30, thereby effectively improving the welding strength of the valve core seat 30 and the valve seat 10, so that the structural stability of the valve body assembly 100 is good, and the risk of detachment and leakage of the valve core seat 30 is reduced.

[0042] Please continue to refer to Figure 3 and Figure 5 In one embodiment, the valve core seat 30 has an outer circular surface 311 and an end plane 313, the outer circular surface 311 faces the inner wall surface of the mounting hole 11, the end plane 313 is perpendicular to the axial direction of the mounting hole 11, and the outer circular surface 311 is provided with the first recess 3111, which extends to the end plane 313 of the valve core seat 30.

[0043] In this embodiment, the valve core seat 30 is configured to be generally cylindrical, having an outer circumferential surface 311 and two end flat surfaces 313 at either end. Here, the outer circumferential surface 311 faces the inner wall of the mounting hole 11, so the mounting hole 11 is also a circular hole, and its inner wall is also an arc surface. The two end flat surfaces 313 are respectively perpendicular to the axis direction of the mounting hole 11. Of course, in other embodiments, the valve core seat 30 may also be configured to be a rectangular parallelepiped or other cylindrical shape. The opening shape of the first recess 3111 here can be circular or square, and the first recess 3111 extends to at least one end plane 313 of the valve core seat 30. Here, it only extends to the end plane 313 of the lower end, so that there is a larger connecting space between the first channel 100a and the outside world. Due to the fluidity of the solder, during welding connection, the open first channel 100a can improve the fluidity of the solder, making it more convenient for the solder to enter the first channel 100a, thereby filling the space of the first channel 100a, increasing the connection strength, ensuring welding stability, and improving the installation reliability of the valve core seat 30, thereby improving the reliability of the product.

[0044] Of course, in other embodiments, the inner wall of the groove can be extended to the upper end plane 313, that is, the upper end plane 313 can be opened to connect with the groove, or the groove can pass through the upper and lower end planes 313 of the valve core seat 30. Here, because the valve core seat 30 is cylindrical and the valve port 30a is formed inside the valve core seat 30, it is necessary to fine-machine it. Providing the first recess 3111 on the outer circumferential surface 311 of the valve core seat 30 can not only facilitate machining, but also improve the precision of the first recess 3111, facilitate control of the size of the first channel 100a, and increase welding stability.

[0045] In addition, in other embodiments, the outer circular surface 311 of the valve core seat 30 can also be provided with a plurality of spaced first recesses 3111, and the plurality of first recesses 3111 are arranged in the axial direction of the mounting hole 11. In this way, the space of the first channel 100a between the outer circular surface 311 of the valve core seat 30 and the inner wall surface of the mounting hole 11 can be further increased, and more solder can be accommodated, thereby further increasing the connection area between the two, improving the welding stability, and ensuring the structural reliability of the valve core seat 30.

[0046] Of course, in other embodiments, a first recess 3111 may be provided on the outer circular surface 311 while a corresponding groove may be provided on the inner wall surface of the mounting hole 11, thereby making the space of the first channel 100a larger, accommodating more welding flow and increasing welding strength.

[0047] In one embodiment, the outer circular surface 311 is interference fit with the inner wall surface of the mounting hole 11 .

[0048] In this embodiment, in order to achieve a firm fixation between the valve core seat 30 and the valve seat 10, when the first recess 3111 is a groove, the outer cylindrical surface 311 of the valve core seat 30 and the inner wall surface of the mounting hole 11 are set to be an interference fit. On the one hand, the valve core seat 30 can be stably positioned before welding to prevent dislocation, thereby facilitating welding; on the other hand, after welding is completed, the close combination between the valve core seat 30 and the valve seat 10 can also prevent fluid leakage from the gap, thereby improving the performance of the product.

[0049] Please continue to refer to Figure 5 In one embodiment, there are multiple first recesses 3111 , and the multiple first recesses 3111 are evenly distributed along the outer circumferential surface 311 of the valve core seat 30 .

[0050] In order to further increase the number of welding flow channels, the number of first recesses 3111 can be set to multiple, and multiple first recesses 3111 can be distributed along the circumferential direction of the valve core seat 30, for example, two, three, or more than three, thereby forming more first channels 100a, allowing more solder to enter the first channels 100a, further increasing the welding connection area between the valve core seat 30 and the valve seat 10, thereby further improving the installation stability of the valve core seat 30 and ensuring the reliability of the product. It can be understood that when multiple first recesses 3111 are provided, the multiple first recesses 3111 are evenly distributed along the circumferential direction of the valve core seat 30, which can make the welding positions of the two more uniform, that is, the welding stress points of the valve core seat 30 more uniform, which can effectively avoid local stress concentration in the valve core seat 30, thereby reducing the probability of stress damage and further extending the service life of the valve body assembly 100.

[0051] Please refer to Figures 3 to 5 In one embodiment, the outer circular surface 311 of the valve core seat 30 is further provided with an annular protrusion 33, and the inner wall surface of the mounting hole 11 is concavely provided with a docking groove 13 corresponding to the annular protrusion 33. The annular protrusion 33 is loosely matched with the docking groove 13, and a first gap is formed for solder to enter.

[0052] In this embodiment, the outer surface 311 of the valve core seat 30 is further provided with an annular protrusion 33. The annular protrusion 33 is provided on the outer surface 311 of the valve core seat 30 in a direction away from the center of the valve core seat 30. The length of the annular protrusion 33 in the axial direction of the mounting hole 11 can be set as needed. Here, the protrusion is partially confined within the mounting hole 11, and partially protrudes from the mounting hole 11. Therefore, the annular protrusion 33 has a docking surface 331 perpendicular to the axial direction of the mounting hole 11. The docking surface 331 is located within the mounting hole 11. The inner wall of the mounting hole 11 is provided with a docking groove 13 corresponding to the annular protrusion 33. The inner wall of the docking groove 13 perpendicular to the axial direction of the mounting hole 11 is the bottom wall, and the bottom wall is arranged opposite to the docking surface 331. The annular protrusion 33 and the docking groove 13 are clearance-matched, and a first gap is formed between the two. Therefore, after the solder enters the first channel 100a, it can be filled in the first gap by capillary action, thereby enhancing the connection area between the valve core seat 30 and the valve seat 10 and improving the welding performance.

[0053] At the same time, the docking surface 331 is perpendicular to the first channel 100a, so that a welding fixation perpendicular to the force direction is formed between the valve core seat 30 and the inner wall surface of the mounting hole 11, thereby significantly decomposing the air pressure in the vertical direction and further reducing the chance of falling off and leakage.

[0054] Please combine Figure 3 and Figure 5In one embodiment, a second recess 3311 is provided on the docking surface 331 and / or one of the bottom walls of the docking groove 13 to form a second channel 100b between the valve core seat 30 and the valve seat 10, and the second channel 100b is connected to the first channel 100a.

[0055] In this embodiment, a second recess 3311 is provided on one of the bottom wall of the docking groove 13 and the docking surface 331. The second recess 3311 may have the same or different shapes as the first recess 3111. For example, the second recess 3311 provided on the docking surface 331 may be in the shape of a circular groove or a square groove. A second channel 100b is formed between the inner wall of the second recess 3311 and the bottom wall of the docking groove 13. The second channel 100b is connected to the first channel 100a, which can accommodate more solder and further improve the fluidity of the solder, thereby enhancing the structural stability of the valve core seat 30. Furthermore, the welded connection of the second channel 100b is perpendicular to the welded connection in the first channel 100a, providing a connection relationship different from the direction of the punching force, and increasing the limiting effect in the vertical direction. Therefore, the stable installation of the valve core seat 30 can be enhanced in both the connection area and the limiting direction.

[0056] Specifically, when the valve core seat 30 is cylindrical, the first recess 3111 and the second recess 3311 can be located on the same radial line of the valve core seat 30, facilitating processing. Of course, in other embodiments, the second recess 3311 and the first recess 3111 can also be located on different radial lines of the valve core seat 30, so that a hole can be opened to connect the two, further increasing the weld flow channel and improving structural stability. In addition, in other embodiments, the second recess 3311 can also be provided on the bottom wall of the docking groove 13; or the second recess 3311 can be provided on both the docking surface 331 and the bottom wall of the docking groove 13.

[0057] At the same time, the annular protrusion 33 has a mating surface 333 facing the inner wall of the mounting hole 11. The aforementioned first gap is formed between the mating surface 333 and the sidewall of the docking groove 13. This allows the solder, after passing through the first channel 100a and the second channel 100b, to fill the second gap 100c and the upward-facing opening edge of the mounting hole 11 through capillary action, further improving welding performance and ensuring the structural stability of the valve core seat 30. Furthermore, the mating surface 333 of the annular protrusion 33 partially protrudes from the mounting hole 11 and is located within the valve cavity 10a. This allows the solder entering the first gap to be confined between the edge of the mounting hole 11 and the mating surface 333 upon entering the valve cavity 10a, preventing the solder from flowing toward the valve port 30a of the valve core seat 30 and improving welding safety. Furthermore, in one embodiment, to further prevent solder from entering the valve port 30a, a stepped portion is provided on the end plane 313 at the upper end of the valve core seat 30, with the valve port 30a extending through the stepped portion.

[0058] Please refer to Figure 2 and Figure 3 In one embodiment, the valve body assembly 100 further includes a first conducting tube 50, which is connected to one end of the valve core seat 30 away from the valve cavity 10a, and a second gap 100c is formed between the first conducting tube 50 and the inner wall surface of the mounting hole 11.

[0059] In this embodiment, the first conducting tube 50 is a pipe located at the valve port 30a, allowing fluid to flow out through the pipe. Specifically, the first conducting tube 50 is fixedly connected to the valve core seat 30, and the end portion of the first conducting tube 50 is partially recessed within the mounting hole 11. That is, in the vertical direction, a portion of the outer circumference of the first conducting tube 50 corresponds to the inner wall surface of the mounting hole 11. A second gap 100c is formed between the first conducting tube 50 and the inner wall surface of the mounting hole 11. This second gap 100c can communicate with the first channel 100a, allowing solder to flow into the second gap 100c during welding of the valve core seat 30, thereby achieving a connection between the valve seat 10 and the first conducting tube 50. This can indirectly enhance the connection stability between the valve seat 10 and the valve core seat 30, thereby improving the structural reliability of the valve body assembly 100. In this way, the setting of the second gap 100c can further increase the fluidity of the solder, thereby promoting the fluidity of the solder in the first channel 100a, and then realizing the filling in the second channel 100b. Since the solder flow channel between the valve core seat 30 and the valve seat 10 has a bending feature, the setting of the second gap 100c can significantly increase the fluidity of the solder, prevent the solder entering the first channel 100a through capillary action from solidifying and reducing the filling of the second channel 100b, and combined with the structure of the second channel 100b, significantly ensure the welding strength and improve the structural stability.

[0060] Please refer to Figure 3 and Figure 5 In one embodiment, the valve core seat 30 includes a main body 31 and a connecting portion 35, the main body 31 has the outer circular surface 311 and the end plane 313, the connecting portion 35 is connected to the end plane 313 of the main body 31 away from the valve cavity 10a, the first conducting tube 50 is sleeved on the connecting portion 35, and the second gap 100c is connected to the first channel 100a.

[0061] In this embodiment, to increase the contact area between the valve core seat 30 and the first conducting tube 50, the valve core seat 30 includes a body 31 and a connecting portion 35. The body 31 has the aforementioned structure with an outer circular surface 311 and an end plane 313. The protrusion is also provided near the upper end of the body 31. The connecting portion 35 is connected to the end plane 313 of the body 31 away from the protrusion. The connecting portion 35 is tubular in shape, and the first conducting tube 50 is sleeved on the connecting portion 35, specifically, by an interference fit, thereby enhancing the stability of the connection between the two. Here, the body 31 and the connecting portion 35 can be integrally formed, which provides high structural strength.

[0062] Specifically, the outer diameter of the first conducting tube 50 can be set with reference to the diameter of the outer circular surface 311 to ensure that the first conducting tube 50 does not block the first channel 100a. The second gap 100c is an annular space, so that it can be connected with multiple first channels 100a. Therefore, when welding the valve core seat 30, the solder flow can be stored in the second gap 100c, thereby realizing the connection between the valve seat 10 and the first conducting tube 50, enhancing the connection stability of the first conducting tube 50, and indirectly enhancing the connection stability between the valve seat 10 and the valve core seat 30, thereby making the structural reliability of the valve body assembly 100 higher.

[0063] Please refer again Figure 3 In one embodiment, an opening edge of the mounting hole 11 away from the valve cavity 10a is chamfered; and / or

[0064] The end of the first conducting tube 50 facing the mounting hole 11 is chamfered.

[0065] Here, to further increase the second gap 100c, the edge of the opening of the mounting hole 11 near the first conductive tube 50 is chamfered, forming a flared structure. This increases the capacity to accommodate solder, thereby increasing the soldering area and improving soldering stability. Of course, the end face of the first conductive tube 50 can also be chamfered to form a tapered end, which can also increase the space of the second gap 100c, ensure solder flow, and improve soldering performance. Alternatively, the edge of the opening of the mounting hole 11 and the end face of the first conductive tube 50 can be chamfered simultaneously to further increase the space of the second gap 100c and improve soldering stability.

[0066] The present invention also discloses an electronic expansion valve (not shown), comprising a coil assembly and a valve body assembly 100 according to any of the aforementioned embodiments. The coil assembly defines a mounting cavity, and the valve body assembly 100 is mounted within the mounting cavity at one end thereof distal from the valve seat 10. Since the specific structure of the valve body assembly 100 in the electronic expansion valve of this embodiment is similar to that of the aforementioned embodiments, it at least exhibits the beneficial effects of the technical solutions of the aforementioned embodiments and will not be further elaborated upon here.

[0067] The electronic expansion valve is used in an air conditioner, which can be a split-type or cabinet-type air conditioner; it can be a household or commercial air conditioner, without limitation. The electronic expansion valve includes a valve body assembly 100 and a coil assembly. The valve body assembly 100 specifically has the structure of the aforementioned embodiment. The coil assembly includes an electrically connected coil and wiring terminals, and an injection-molded housing that encloses and secures the coil and wiring terminals. The coil forms a mounting cavity. The end of the valve body assembly 100 distal to the valve port 30a is positioned within the mounting cavity, positioning the rotor 90 within the annular space of the coil. The electronic expansion valve operates as follows: after connecting to an external circuit via the wiring terminals, power can be applied to the coil. This power generation generates an electromagnetic force, driving the rotor 90 to rotate. A transmission mechanism converts this rotation into linear motion, which is then transmitted to the valve needle assembly 20, causing the valve needle assembly 20 to move linearly in the direction of opening and closing the valve port 30a, thereby controlling the opening of the electronic expansion valve.

[0068] The present invention further discloses a refrigeration device (not shown) including the electronic expansion valve described above. Since the specific structure of the valve body assembly 100 in the electronic expansion valve of the refrigeration device of this embodiment is similar to that of the above embodiment, it at least has the beneficial effects brought about by the technical solutions of the above embodiment, and will not be described in detail here.

[0069] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present description and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A valve body assembly, applied to an electronic expansion valve, characterized in that: The valve body assembly comprises: a valve seat having a valve cavity and a mounting hole; and A valve core seat is installed at the installation hole, and the valve core seat is provided with a valve port communicating with the valve cavity; The outer wall surface of the valve core seat is provided with a first recessed portion so that a first channel for solder to enter is formed between the valve core seat and the inner wall surface of the mounting hole; The valve core seat has an outer circular surface and an end plane, the outer circular surface faces the inner wall surface of the mounting hole, the end plane is perpendicular to the axial direction of the mounting hole, the outer circular surface is provided with the first recessed portion, and the first recessed portion extends to the end plane of the valve core seat; The outer cylindrical surface is interference fit with the inner wall surface of the mounting hole; The outer circular surface of the valve core seat is also provided with an annular protrusion, and the inner wall surface of the mounting hole is concavely provided with a docking groove corresponding to the annular protrusion. The annular protrusion and the docking groove are gap-matched to form a first gap for solder to enter. After the solder enters the first channel, it can be filled in the first gap by capillary action.

2. The valve body assembly according to claim 1, wherein: There are multiple first recesses, and the multiple first recesses are evenly distributed along the outer circumferential surface of the valve core seat.

3. The valve body assembly according to claim 1, wherein: The annular protrusion has a docking surface perpendicular to the axial direction of the mounting hole, and one of the docking surface and / or the bottom wall of the docking groove is provided with a second recess so that a second channel for solder to enter is formed between the valve core seat and the valve seat, and the second channel is connected to the first channel.

4. The valve body assembly according to claim 3, wherein: The valve body assembly further includes a first conducting tube connected to an end of the valve core seat facing away from the valve cavity, and a second gap is formed between the first conducting tube and the inner wall surface of the mounting hole.

5. The valve body assembly according to claim 4, wherein: The valve core seat includes a body and a connecting portion, the body has the outer circular surface and the end plane, the connecting portion is connected to the end plane of the body away from the valve cavity, the first conducting tube is sleeved on the connecting portion, and the second gap is connected to the first channel.

6. The valve body assembly according to claim 4, wherein: An opening edge of the mounting hole away from the valve cavity is chamfered; and / or, The end of the first conducting tube facing the mounting hole is chamfered.

7. An electronic expansion valve, characterized in that: The invention comprises a coil assembly and a valve body assembly according to any one of claims 1 to 6, wherein the coil assembly is formed with a mounting cavity, and an end of the valve body assembly away from the valve seat is mounted in the mounting cavity.

8. A refrigeration device, characterized in that: Comprising the electronic expansion valve as claimed in claim 7.

Images