Electronic expansion valve and air conditioning system

Abstract

The application provides an electronic expansion valve and an air conditioning system. The electronic expansion valve comprises a first valve body and a support. The first valve body has a first port configured to be connected to a first pipe; and the support is connected to the first valve body. The support and the first port are arranged axially apart along the electronic expansion valve, and the support is at least partially in contact with an inner cavity of the first valve body. A side wall of the first valve body is provided with a third port configured to be connected to a second pipe. The third port is located between the support and the first port. An inner surface of the side wall of the first valve body between an outer wall of the second pipe connected to the third port and the support is provided with a solder accommodating structure.

Description

Technical Field

[0001] This application relates to the field of electronic expansion valve technology, and in particular to an electronic expansion valve and an air conditioning system. Background Technology

[0002] An electronic expansion valve is a control device used in refrigeration equipment. Currently, electronic expansion valves are increasingly used in small and medium-sized refrigeration equipment, most commonly in refrigeration mechatronics systems, where they are controlled by electrical signals to ensure stable and efficient system operation.

[0003] In existing electronic expansion valves, fluid lines are typically connected to the valve by welding. Often, one fluid line needs to be welded to the side wall of the electronic expansion valve. This may cause the solder to overflow onto the inner surface of the side wall of the electronic expansion valve, affecting the installation of other structures connected to the inside of the electronic expansion valve.

[0004] The above description of "prior art" provides background information only and does not acknowledge that the above description of "prior art" discloses the subject matter of this application. It does not constitute prior art of this application, and no description of the above "prior art" should be considered part of this application. Utility Model Content

[0005] The main objective of this application is to overcome at least one of the defects of the prior art and to provide an electronic expansion valve that can avoid the influence of solder overflow.

[0006] To achieve the above objectives, this application adopts the following technical solution: According to one aspect of this application, an electronic expansion valve is provided, including a first valve body and a support member. The first valve body has a first port configured to connect to a first pipe. The support member is connected to the first valve body, and the support member and the first port are axially spaced apart along the electronic expansion valve. The support member at least partially contacts the inner cavity of the first valve body. A third port is provided on the side wall of the first valve body, configured to connect to a second pipe. The third port is located between the support member and the first port. A solder receiving structure is provided on the inner surface of the side wall of the first valve body connecting the outer wall of the second pipe between the third port and the support member.

[0007] According to one embodiment of this application, the solder receiving structure includes a groove or a chamfer.

[0008] According to one embodiment of this application, the length of the solder receiving structure is greater than the outer diameter of the second tube.

[0009] According to one embodiment of this application, the solder receiving structure extends along the inner wall of the first valve body, and on the bottom wall of the valve cavity of the first valve body, the orthographic projection of the second tube is at least partially located within the orthographic projection of the solder receiving structure.

[0010] According to one embodiment of this application, the electronic expansion valve further includes a second valve body disposed within the first valve body and located between the support member and the first port, the second valve body being configured to open and close the first port. According to another embodiment of this application, the second valve body has a second port capable of communicating with the first port and the third port.

[0011] According to one embodiment of this application, a flow port is provided on the side wall of the second valve body. When both the first port and the second port are closed, along the axial direction of the electronic expansion valve, the distance between the center line of the second tube and the support is less than or equal to the distance between the bottom wall of the valve cavity of the second valve body and the support. The radius of the inner hole of the second tube connected to one end of the first valve body is R, and the distance between the center line of the second tube and the bottom wall of the valve cavity of the second valve body is D1. Then, 0.5≤R / D1≤2.

[0012] According to one embodiment of this application, the second valve body includes a first part and a second part, the first part and the second part extending along the axial direction of the electronic expansion valve, the first part and the inner wall of the first valve body slidingly guiding each other, the second part being located radially inside the first part, the second part being able to connect the first port and the third port, and the first part and the second part being an integral or separate structure.

[0013] According to one embodiment of this application, the first part includes at least two plate-shaped members that are separated from each other, and a flow port is formed between adjacent plate-shaped members, the flow port connecting the valve cavity of the first valve body and the valve cavity of the second valve body.

[0014] According to one embodiment of this application, the second valve body further has a connecting portion that extends in a direction perpendicular to the axis of the electronic expansion valve, and the connecting portion connects the first portion and the second portion.

[0015] According to one embodiment of this application, the first part and the second part are separate structures; or the first part and the second part are separately formed and welded together.

[0016] According to one embodiment of this application, the welding is laser welding, and / or the second part is a precision-machined part and the first part is a stretched part.

[0017] According to one embodiment of this application, the electronic expansion valve further includes a rotor assembly and a valve core assembly, the second valve body having a second port that connects the first port and the third port; the valve core assembly is at least partially disposed in the second valve body, and the valve core assembly is configured to be driven by the rotor assembly to open and close the second port.

[0018] According to one embodiment of this application, when fluid flows from the second pipe to the first pipe, the second valve body closes the first port under the action of pressure differential force, and the valve core assembly is driven by the rotor assembly to adjust the flow rate of the second port; when fluid flows from the first pipe to the second pipe, the second valve body opens the first port under the action of pressure differential force.

[0019] According to one embodiment of this application, when the electronic expansion valve is in the fully open position, the second valve body abuts against the support member, and there is a gap between the second port and the valve core assembly, or the second valve body abuts against the valve core assembly.

[0020] According to one embodiment of this application, the electronic expansion valve further includes a rotor assembly and a valve core assembly, the rotor assembly driving the valve core assembly to move along the axial direction of the electronic expansion valve, the support member having an internal thread portion and a valve core guide portion, the valve core guide portion being located on the side of the internal thread portion near the first port; the support member and the inner wall of the first valve body are transitionally or interference-fitted. And / or, the inner wall of the first valve body has a stepped portion, and the support member and the stepped portion are mutually restrictive and fitted along the axial direction of the electronic expansion valve.

[0021] According to another aspect of this application, an air conditioning system is provided, including the electronic expansion valve as described above.

[0022] As can be seen from the above technical solution, the advantages and positive effects of the electronic expansion valve proposed in this application are as follows: The electronic expansion valve proposed in this application has a solder receiving structure on the inner surface of the side wall of the first valve body between the outer wall of the second tube facing the support member and the support member. This structure can prevent solder from overflowing from the inner surface of the side wall of the electronic expansion valve into the mounting groove of the support member, thus avoiding any impact on the installation of the support member of the electronic expansion valve. Attached Figure Description

[0023] The various objectives, features, and advantages of this application will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of this application and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein: Figure 1This is a schematic diagram of the electronic expansion valve in the closed state of this application.

[0024] Figure 2 yes Figure 1 A schematic diagram of the structure of the electronic expansion valve in the state of opening the first port.

[0025] Figure 3 yes Figure 1 Enlarged view of point I.

[0026] Figure 4 yes Figure 2 Enlarged view at point II.

[0027] Figure 5 This is an enlarged structural schematic diagram of another embodiment of the electronic expansion valve of this application (enlarged part and state of the electronic expansion valve are shown). Figure 4 same).

[0028] Figure 6 This is a schematic diagram of the structure of the second valve body and the second pipe of the electronic expansion valve of this application.

[0029] The annotations in the attached figures are explained as follows: 1-Electronic expansion valve; 2-First tube; 3-Second tube; 4-First cavity; 5-Second cavity; 10 - First valve body; 20 - Second valve body; 30 - Valve core assembly; 40 - Support component; 50 - Solder containment structure; 60 - Rotor assembly; 101 - First Port; 102 - Third Port; 201 - Second Port; 202 - Part One; 2021-plate parts; 2022 - Distribution Port; 203 - Part Two; 2031-flow channel; 204 - Connecting part; d - Diameter of the flow channel; t - Length of the flow channel; D1 - Distance between the centerline of the second pipe and the bottom wall of the valve cavity of the second valve body; L1 - Distance between the inner wall of the first valve body and the outer wall of the second part of the second valve body; L2 - The distance between the bottom wall of the valve chamber of the first valve body and the connecting part. Detailed Implementation

[0030] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0031] In the following description of various exemplary embodiments of this application, reference is made to the accompanying drawings, which form part of this application, and which illustrate by way of example different exemplary structures, systems, and steps that can implement various aspects of this application. It should be understood that other specific solutions to components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of this application. Furthermore, while the terms “above,” “between,” “within,” etc., may be used in this specification to describe different exemplary features and elements of this application, these terms are used herein only for convenience, such as the orientation according to the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of this application.

[0032] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0033] As used herein, “about,” “approximately,” “essentially,” or “substantially” includes the value and the average value within an acceptable range of deviations from a particular value as determined by one of ordinary skill in the art, taking into account the measurement under discussion and a particular number of errors associated with the measurement (i.e., limitations of the measurement system). For example, “about” may mean within one or more standard deviations of the value, or, for example, within ±30%, ±20%, ±15%, ±10%, ±5%. Furthermore, the use of “about,” “approximately,” “essentially,” or “substantially” herein may be chosen to select a more acceptable range of deviations or standard deviations depending on the nature of the measurement, the cutting nature, or other properties, and may not require a single standard deviation to apply to all properties.

[0034] Furthermore, relative terms such as “down” or “bottom” and “up” or “top” may be used herein to describe the relationship between one element and another, as illustrated in the figures. It should be understood that relative terms are intended to include different orientations of the device beyond those shown in the figures. For example, if a device in one figure is flipped, an element described as being “down” to another element will be oriented “up” to that element. Thus, the exemplary term “down” can include both “down” and “up” orientations, depending on the specific orientation of the figure. Similarly, if a device in one figure is flipped, an element described as being “below” or “under” another element will be oriented “above” that element. Thus, the exemplary terms “above” or “below” can include both “up” and “down” orientations.

[0035] This document describes exemplary embodiments with reference to cross-sectional views, which are schematic diagrams of idealized embodiments. Therefore, variations in the shape of the illustrations can be expected as a result of, for example, manufacturing techniques and / or tolerances. Consequently, the embodiments described herein should not be construed as limited to the specific shapes of the regions shown herein, but rather include, for example, shape deviations caused by manufacturing processes. For example, regions shown or described as flat may generally have rough and / or non-linear characteristics. Furthermore, the acute angles shown may be rounded. Therefore, the regions shown in the figures are schematic in nature, and their shapes are not intended to show the precise shapes of the regions, nor are they intended to limit the scope of this application.

[0036] like Figures 1 to 4 and Figure 6As shown, the electronic expansion valve 1 of this application includes a first valve body 10, a second valve body 20, a valve core assembly 30, a rotor assembly 60, and a support member 40. The first valve body 10 has a first port 101 configured to connect to a first pipe 2. The second valve body 20 is disposed within the first valve body 10 and configured to open and close the first port 101. The second valve body 20 has a second port 201. A third port 102 is provided on the side wall of the first valve body 10 and configured to connect to a second pipe 3. The valve core assembly 30 is at least partially disposed within the second valve body 20 and configured to open and close the second port 201 when driven by the rotor assembly 60. The third port 102 is located between the support member 40 and the first port 101. The second valve body 20 includes a first portion 202 and a second portion 203 connected to the first portion 202. The first portion 202 and the second portion 203 extend along the axial direction of the electronic expansion valve. Preferably, the first part 202 and the inner wall of the first valve body 10 are in sliding guide engagement. The second part 203 is located radially inside the first part 202, between the third port 102 and the first port 101. The second part 203 is provided with a flow channel 2031 connecting the first port 101 and the third port 102, and the second port 201 is formed in the flow channel 2031. The valve core assembly 30 is disposed in the second valve body 20, and the valve core assembly 30 is capable of opening and closing the flow channel 2031. The length t of the flow channel 2031 is greater than the diameter d of the flow channel 2031, and the distance between the outer wall of the second part 203 and the centerline of the flow channel 2031 is less than the distance between the outer wall of the first part 202 and the centerline of the flow channel 2031.

[0037] In the electronic expansion valve 1 of this application, the length t of the flow channel 2031 is greater than the diameter d of the flow channel 2031. The distance between the outer wall of the second part 203 and the center line of the flow channel 2031 is less than the distance between the outer wall of the first part 202 and the center line of the flow channel 2031. This allows the overall size of the second part 203 to shrink towards the center of the flow channel 2031 in the radial direction, which increases the volume of the valve cavity between the first valve body 10 and the second valve body 20. As a result, the flow rate of the electronic expansion valve 1 can be close to the flow rate of the pipeline when used in reverse.

[0038] In this embodiment, specifically, see [link to relevant documentation]. Figure 6The first part 202 is composed of at least two separate plate-shaped members 2021, with a flow port 2022 formed between adjacent plate-shaped members 2021 for fluid to flow in. The flow port 2022 is open at the top, and the second pipe 3 is connected to the flow port 2022 to allow fluid to flow in through the flow port 2022. The plate-shaped members 2021 and the inner wall of the first valve body 10 are in sliding guide engagement. The bottom edge of the flow port 2022 is flush with the bottom wall of the valve cavity of the second valve body 20.

[0039] In this embodiment, the second valve body 20 further includes a connecting portion 204 connecting the first portion 202 and the second portion 203. The connecting portion 204 is disposed at the end of the first portion 202 facing the second portion 203. The distance between the inner wall of the first valve body 10 and the outer wall of the second portion 203 of the second valve body 20 is L1. The first portion 202 and the inner wall of the first valve body 10 are in sliding guide engagement. The distance between the outer wall of the second portion 203 and the center line of the flow channel 2031 is less than the distance between the outer wall of the first portion 202 and the center line of the flow channel 2031. The second portion 203 is located radially inside the first portion 202 to form the connecting portion 204. Therefore, a gap is formed between the second portion 203 and the first valve body 10 to increase the volume of the valve cavity when fully open. The size of the gap can be represented by L1. The distance between the bottom wall of the valve cavity of the first valve body 10 and the connecting portion 204 is L2. When the first port 101 is in the fully open state, L2 is greater than or equal to L1. The fully open state refers to the state in which the second valve body 20 moves to its limit along the axial direction away from the first port 101 and can no longer move in this direction.

[0040] The electronic expansion valve is capable of bidirectional flow; the electronic expansion valve of this application is defined to have a first flow direction and a second flow direction. In the first flow direction, the medium inside the electronic expansion valve flows from the third port 102 to the first port 101. The second valve body 20 is closed by the pressure differential force, and the valve core assembly 30 is driven by the rotor assembly to regulate the flow rate at the second port 201, thus achieving small flow rate regulation. In the second flow direction, the medium inside the electronic expansion valve flows from the first port 101 to the third port 102. The second valve body 20 is opened by the pressure differential force, thus achieving large flow rate flow. When the electronic expansion valve 1 is used in the first flow direction, fluid enters through the second pipe 3 and flows out through the first pipe 2. The third port 102 is the high-pressure side. Under the action of the pressure difference, the second valve body 20 closes the first port 101. At this time, the valve core assembly 30 is driven by the rotor assembly 60 to regulate the flow rate of the second port 201. When the electronic expansion valve 1 is used in the second flow direction, fluid enters through the first pipe 2 and flows out through the second pipe 3. At this time, the first port 101 is the high-pressure side. From the fully closed position, the valve core assembly 30 moves upward, and the second valve seat 20 can open the first port 101 under the drive of the pressure difference. At this time, in the fully open position, the second port 201 can be closed or there can be a gap between it and the valve core assembly 30.

[0041] The electronic expansion valve 1 of this application is defined as having a fully closed state, that is, both the first port 101 and the second port 201 are closed; the valve core assembly 30 is defined as opening the second port 201 in the upward direction and closing the second port 201 in the downward direction. In the fully closed state, along the axial direction of the electronic expansion valve 1, the distance between the centerline of the second tube 3 and the rotor assembly 60 is less than or equal to the distance between the bottom wall of the valve cavity of the second valve body 20 and the rotor assembly 60, that is, the centerline of the second tube 3 is located at the same level as or above the bottom wall of the valve cavity of the second valve body 20. This design can prevent the second valve body 20 from moving up and down when the electronic expansion valve 1 is used in the first downward flow, from the fully closed state to opening the second port 201. The valve cavity between the first valve body 10 and the second valve body 20 can be defined as the first cavity 4, and the cavity between the second valve body and the valve core assembly can be defined as the second cavity 5. When the electronic expansion valve 1 is in the fully closed state, the pressure in the first cavity 4 between the first valve body 10 and the second valve body 20 is balanced with the pressure in the second cavity 5 between the second valve body 20 and the valve core assembly 30. When the electronic expansion valve 1 is used in the first flow downward, when it switches from the fully closed state to the valve core assembly 30 disengaging from the second port 201, fluid flows in from the second pipe 3. When the valve core assembly 30 moves upward, the second cavity 5 between the second valve body 20 and the valve core assembly 30 connects with the first pipe 2, causing the pressure in the second cavity 5 to start to depressurize from the second port 201. If the inner hole of the second pipe 3 is relatively lower than the bottom wall of the valve cavity of the second valve body 20, for example, if the centerline of the second pipe 3 is below the bottom wall of the valve cavity of the second valve body 20, then... This will cause the fluid flow rate entering the second chamber 5 to be smaller than the fluid flow rate entering the valve chamber of the first chamber 4. At the same time, there is pressure relief at the second port 201, which will cause the pressure in the second chamber 5 to be less than the pressure in the first chamber 4. This may cause the second valve body 20 to move upward and the first port 101 to open. After the first port 101 opens, the pressure in the first chamber 4 will start to depressurize from the first port 101, which will eventually cause the second valve body 20 to fall downward, causing the second valve body 20 to move up and down.

[0042] Therefore, the design of the center line of the second pipe 3 in this application is above or flush with the bottom wall of the valve cavity of the second valve body 20. This ensures that when the electronic expansion valve 1 is used in the first flow direction, from fully closed to open at the second port 201, even if there is pressure relief at the second port 201, the pressure in the second cavity 5 will not be less than the pressure in the first cavity 4, and the second valve body 20 will not move upward, thus preventing the problem of the second valve body 20 moving up and down.

[0043] Specifically, the radius of the inner hole of the second pipe 3 connected to one end of the first valve body 10 is R, and the distance between the centerline of the second pipe 3 and the bottom wall of the valve cavity of the second valve body 20 is D1, which satisfies 0.1≤R / D1≤5. Preferably, the relationship between the two satisfies 0.5≤R / D1≤2.

[0044] In this embodiment, the distance between the centerline of the end of the second pipe 3 that extends into the inner hole of the first valve body 10 and the support member 40 is less than or equal to the distance between the bottom wall of the valve cavity of the second valve body 20 and the support member 40. This prevents the second valve body 20 from moving up and down.

[0045] Furthermore, the support member 40 is connected to the first valve body 10. The support member 40 and the first port 101 are spaced apart along the axial direction of the electronic expansion valve 1. The support member 40 is at least partially in contact with the inner cavity of the first valve body 10 to improve the coaxiality of the support member 40 and the first valve body 10. A solder receiving structure 50 is provided on the inner surface of the side wall of the first valve body 10 between the outer wall of the second tube 3 connected to the third port 102 and the support member 40. Since the second tube 3 needs to be welded to the side wall of the first valve body 10, and the support member 40 needs to contact the inner cavity of the first valve body 10, solder may flow to the inner surface of the side wall of the first valve body 10 for the mating position of the support member 40 during the welding process, interfering with the subsequent installation of the support member 40.

[0046] In this embodiment, the solder receiving structure 50 includes a groove, which can accommodate and guide molten solder, preventing solder from accumulating on the inner surface of the sidewall of the first valve body 10 between the second pipe 3 and the support member 40. The cross-section of the groove can be triangular, rectangular, or U-shaped, etc., wherein the cross-section is a surface perpendicular to the length direction of the groove. The length of the solder receiving structure 50 is greater than the outer diameter of the second pipe 3. The width, depth, and other dimensions of the groove can be adjusted appropriately according to actual conditions. In this embodiment, the groove is set in a full circle, which can improve the solder-accommodating capacity. In some other embodiments, the groove can also be set only in the part of the second pipe 3 near the top of the support member 40, and the length of the groove is greater than the outer diameter of the second pipe 3, which can ensure that the groove has sufficient length to accommodate excess solder and prevent excess solder from flowing to the installation position of the support member 40.

[0047] In this embodiment, the solder receiving structure 50 extends along the inner wall of the first valve body 10. On the bottom wall of the valve cavity of the first valve body 10, the orthographic projection of the second tube 3 is at least partially located within the orthographic projection of the solder receiving structure 50, so as to ensure that when welding the second tube 3, the overflowing molten solder can enter the solder receiving structure 50.

[0048] Furthermore, in order to ensure a large flow rate in the second flow direction, in the fully closed state, the center line of the second pipe 3 is located flush with or above the bottom wall of the valve cavity of the second valve body 20 along the axial direction of the electronic expansion valve 1. Therefore, the axial distance between the second pipe 3 and the support 40 is closer than that of the conventional structure. The molten solder of welding the second pipe 3 is more likely to interfere with the installation of the support 40. Therefore, setting a solder receiving structure 50 on the inner surface of the side wall of the first valve body 10 between the outer wall of the second pipe 3 connected to the third port 102 and the support 40 also helps to solve this problem.

[0049] In this embodiment, when fluid flows from the second pipe 3 to the first pipe 2, the second valve body 10 closes the first port 101 under the action of pressure differential force, and the valve core assembly 30 adjusts the flow rate of the second port 201 under the drive of the rotor assembly 60; when fluid flows from the first pipe 2 to the second pipe 3, the second valve body 20 opens the first port 101 under the action of pressure differential force. When the electronic expansion valve 1 is in the fully open position, that is, when the first valve port is fully open, and the second valve body 20 moves axially away from the first port 101 to its limit and cannot move further in this direction, the second valve body 10 abuts against the support member 40, and there is a gap between the second port 201 and the valve core assembly 30, or the second valve body 20 abuts against the valve core assembly 30.

[0050] In this embodiment, the support member 40 has an internal thread portion and a valve core guide portion, the valve core guide portion being located on the side of the internal thread portion near the first port 101; the support member 40 being at least partially in contact with the inner cavity of the first valve body 10 means that at least a portion of the support member 40 and the inner wall of the first valve body 10 are in transition or interference fit; and / or, the inner wall of the first valve body 10 has a stepped portion, the support member 40 and the stepped portion being in a limiting fit along the axial direction of the electronic expansion valve 1.

[0051] In this embodiment, the first part 202, the connecting part 204, and the second part 203 are integrally formed structures. Preferably, the second valve body 20 is an integrally formed precision-machined part. Integral forming is simple to process and has high precision.

[0052] In this embodiment, the length t of the flow channel 2031 is ≥ 1.5 times the diameter d of the flow channel 2031. The design of the long flow channel 2031, and the formation of a distance L2 between the bottom wall of the inner cavity of the first valve body 10 and the connecting part 204, increases the volume of the first cavity 4 between the first valve body 10 and the second valve body 20. This allows the electronic expansion valve 1 to throttle and regulate the flow rate when used in the forward direction, and to achieve a large flow rate when used in the reverse direction, with the reverse flow rate approaching the flow rate of the pipeline.

[0053] like Figure 5 As shown, the electronic expansion valve 1 of this application also has a second embodiment, in which the electronic expansion valve 1 of the second embodiment is related to... Figures 1 to 4Compared to the electronic expansion valve 1 of the second embodiment, it has a substantially similar structure in its basic construction. Therefore, in the following description of the electronic expansion valve 1 of this second embodiment, the description will not be repeated. Figures 1 to 4 The structure has already been described in the implementation method. Additionally, regarding... Figures 1 to 4 The electronic expansion valve 1 described in the embodiment has the same structure and is labeled with the same reference numerals. Therefore, in the following description of this embodiment, the structure of the electronic expansion valve 1 is mainly described. Figures 1 to 4 The differences between the electronic expansion valve 1 of the second embodiment and the previous embodiment will be explained. In this second embodiment, the electronic expansion valve 1 is characterized by a second valve body 20 that is molded in two parts. The first part 202 and the connecting part 204 of the second valve body 20 are integrally molded, while the first part 202, the connecting part 204, and the second part 203 are separately molded. The first part 202 and the connecting part 204 can be drawn parts, while the second part 203 is a precision-machined part. The first part 202 and the second part 203 can be connected by welding. The welding is done using laser welding around the entire circumference. Laser welding offers high precision, high efficiency, and good quality. This full-circumference welding enhances the connection strength between the first part 202 and the second part 203, extending the service life of the second valve body 20.

[0054] The electronic expansion valve 1 of this application also has a third embodiment, wherein the electronic expansion valve 1 of the third embodiment is related to... Figures 1 to 4 Compared to the electronic expansion valve 1 of the third embodiment, it has a substantially similar structure in its basic construction. Therefore, in the following description of the electronic expansion valve 1 of this third embodiment, the description will not be repeated. Figures 1 to 4 The structure has already been described in the implementation method. Additionally, regarding... Figures 1 to 4 The electronic expansion valve 1 described in the embodiment has the same structure and is labeled with the same reference numerals. Therefore, in the following description of this embodiment, the structure of the electronic expansion valve 1 is mainly described. Figures 1 to 4 The differences between the electronic expansion valve 1 in this third embodiment and the previous one will be explained. Specifically, in this third embodiment, the electronic expansion valve 1 features a second valve body 20 that is molded in two parts. The second part 203 and the connecting part 204 of the second valve body 20 are integrally molded, while the second part 203, the connecting part 204, and the first part 202 are separately molded. The first part 202 can be a stretched part, while the second part 203 and the connecting part 204 are precision-machined parts. The first part 202 and the second part 203 can be connected by welding. The welding is done using laser welding around the entire circumference. Laser welding offers high precision, high efficiency, and good quality. This full-circumference welding enhances the connection strength between the first part 202 and the second part 203, extending the service life of the second valve body 20.

[0055] The electronic expansion valve 1 of this application also has a fourth embodiment, wherein the electronic expansion valve 1 of the fourth embodiment is related to... Figures 1 to 4Compared to the electronic expansion valve 1 of the previous embodiment, it has a substantially similar structure in its basic construction. Therefore, in the following description of the electronic expansion valve 1 of this fourth embodiment, the description will not be repeated. Figures 1 to 4 The structure has already been described in the implementation method. Additionally, regarding... Figures 1 to 4 The electronic expansion valve 1 described in the embodiment has the same structure and is labeled with the same reference numerals. Therefore, in the following description of this embodiment, the structure of the electronic expansion valve 1 is mainly described. Figures 1 to 4 The differences between the electronic expansion valve 1 in this fourth embodiment and the previous one will be explained. In this fourth embodiment, the electronic expansion valve 1 is characterized by a chamfered solder receiving structure 50, which is located at the connection between the second tube 3 and the third port 102.

[0056] This application also provides an air conditioning system including the above-mentioned electronic expansion valve 1. The air conditioning system of this application, by setting the above-mentioned electronic expansion valve 1, can realize reverse large flow and forward throttling regulation, avoiding the need for a one-way valve to be connected in parallel when the air conditioning system needs to use the electronic expansion valve 1 in reverse, which can reduce the components of the air conditioning system and reduce costs.

[0057] In summary, the electronic expansion valve proposed in this application includes a first valve body and a support member. The first valve body has a first port configured to connect to a first pipe. The support member is connected to the first valve body, and the support member and the first port are spaced apart along the axial direction of the electronic expansion valve. The support member at least partially contacts the inner cavity of the first valve body. A third port is provided on the side wall of the first valve body, configured to connect to a second pipe. The third port is located between the support member and the first port. A solder receiving structure is provided on the inner surface of the side wall of the first valve body connecting the outer wall of the second pipe to the third port and the support member.

[0058] The electronic expansion valve proposed in this application has a solder receiving structure on the inner surface of the side wall of the first valve body between the outer wall of the second tube facing the support and the support. This can prevent the solder from overflowing into the mounting groove of the support on the inner surface of the side wall of the electronic expansion valve, thus avoiding affecting the installation of the support of the electronic expansion valve.

[0059] The electronic expansion valve of this application is used in air conditioning systems, for example, installed inside the outdoor unit of an air conditioning system. The outdoor unit typically houses components that form the refrigerant circuit, such as a compressor, a storage tank, an outdoor heat exchanger, an oil separator, various valves, and a distributor, as well as electrical installation units.

[0060] It is understood that the various embodiments / implementations provided by this utility model can be combined with each other without creating contradictions, and will not be described one by one here.

[0061] In the above exemplary embodiments, the electronic expansion valve and air conditioning system proposed by this utility model are described using an application in the refrigeration field as an example. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments to apply the relevant designs of this utility model to other fields, and these changes are still within the scope of the principles of the electronic expansion valve and air conditioning system proposed by this utility model.

[0062] It should be noted that the electronic expansion valve and air conditioning system shown in the accompanying drawings and described in this specification are merely a few examples of many electronic expansion valves and air conditioning systems capable of employing the principles of this invention. It should be clearly understood that the principles of this invention are by no means limited to any detail or component of the electronic expansion valve and air conditioning system shown in the accompanying drawings or described in this specification.

[0063] In the embodiments of the utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the utility model according to the specific circumstances.

[0064] In the description of the utility model embodiments, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the utility model embodiments and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model embodiments.

[0065] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the utility model. When introducing elements / components / etc. described and / or illustrated herein, the terms "a," "a," and "the above" are used to indicate the presence of one or more elements / components / etc. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] The above are merely preferred embodiments of the utility model and are not intended to limit the utility model. For those skilled in the art, various modifications and variations can be made to the utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the utility model should be included within the protection scope of the utility model.

Claims

1. An electronic expansion valve (1), characterized in that: include: A first valve body (10) has a first port (101) configured to connect to a first pipe (2). A support member (40) is connected to the first valve body (10). The support member (40) and the first port (101) are axially spaced along the electronic expansion valve (1). The support member (40) is at least partially in contact with the inner cavity of the first valve body (10). The first valve body (10) has a third port (102) on its side wall. The third port (102) is configured to connect to a second pipe (3). The third port (102) is located between the support member (40) and the first port (101). The second pipe (3) is connected between the outer wall of the third port (102) and the support member (40). A solder receiving structure (50) is provided on the inner surface of the side wall of the first valve body (10).

2. The electronic expansion valve as described in claim 1, characterized in that: The solder receiving structure (50) includes a groove or a chamfer.

3. The electronic expansion valve as described in claim 1, characterized in that: The length of the solder receiving structure (50) is greater than the outer diameter of the second tube (3).

4. The electronic expansion valve as described in claim 1, characterized in that, The solder receiving structure (50) extends along the inner wall of the first valve body (10), and the orthographic projection of the second tube (3) is at least partially located within the orthographic projection of the solder receiving structure (50) on the bottom wall of the valve cavity of the first valve body (10).

5. The electronic expansion valve as described in claim 1, characterized in that: It also includes a second valve body (20) disposed in the first valve body (10) and located between the support (40) and the first port (101), the second valve body (20) being configured to open and close the first port (101).

6. The electronic expansion valve as described in claim 5, characterized in that, The second valve body (20) has a second port (201) which can connect the first port (101) and the third port (102).

7. The electronic expansion valve as described in claim 6, characterized in that: The second valve body (20) has a flow port (2022) on its side wall. When both the first port (101) and the second port (201) are closed, along the axis of the electronic expansion valve (1), the distance between the center line of the second tube (3) and the support member (40) is less than or equal to the distance between the bottom wall of the valve cavity of the second valve body (20) and the support member (40). The radius of the inner hole of the second tube (3) connected to one end of the first valve body (10) is R, and the distance between the center line of the second tube (3) and the bottom wall of the valve cavity of the second valve body (20) is D1. Then, 0.5≤R / D1≤2.

8. The electronic expansion valve as described in claim 7, characterized in that, The second valve body (20) includes a first part (202) and a second part (203). The first part (202) and the second part (203) extend along the axial direction of the electronic expansion valve (1). The first part (202) and the inner wall of the first valve body (10) are in sliding guide cooperation. The second part (203) is located on the radial inner side of the first part (202). The second part (203) can connect the first port (101) and the third port (102). The first part (202) and the second part (203) are integral or separate structures.

9. The electronic expansion valve as described in claim 8, characterized in that, The first part (202) includes at least two separate plate-shaped members (2021), with the flow port (2022) formed between adjacent plate-shaped members (2021), the flow port (2022) connecting the valve chamber of the first valve body (10) and the valve chamber of the second valve body (20).

10. The electronic expansion valve as described in claim 8, characterized in that: The second valve body (20) also has a connecting part (204) that extends in a direction perpendicular to the axis of the electronic expansion valve (1) and connects the first part (202) and the second part (203).

11. The electronic expansion valve as described in claim 10, characterized in that, The first part (202) and the second part (203) are separate structures; or The first part (202) and the second part (203) are formed separately and welded together.

12. The electronic expansion valve as described in claim 11, characterized in that: The welding is laser welding, and / or the second part (203) is a precision-machined part and the first part (202) is a tensile part.

13. The electronic expansion valve according to any one of claims 5-12, characterized in that: The electronic expansion valve (1) further includes a rotor assembly (60) and a valve core assembly (30), and the second valve body (20) has a second port (201) that connects the first port (101) and the third port (102). The valve core assembly (30) is at least partially disposed in the second valve body (20), and the valve core assembly (30) is configured to be driven by the rotor assembly (60) to open and close the second port (201).

14. The electronic expansion valve as described in claim 13, characterized in that, When fluid flows from the second pipe (3) to the first pipe (2), the second valve body (20) closes the first port (101) under the action of pressure differential force, and the valve core assembly (30) is driven by the rotor assembly (60) to regulate the flow rate of the second port (201); When fluid flows from the first pipe (2) to the second pipe (3), the second valve body (20) opens the first port (101) under the action of pressure differential force.

15. The electronic expansion valve as described in claim 13, characterized in that, When the electronic expansion valve is in the fully open position, the second valve body (20) abuts against the support member (40), and there is a gap between the second port (201) and the valve core assembly (30). Alternatively, the second valve body (20) abuts against the valve core assembly (30).

16. The electronic expansion valve as claimed in claim 1, characterized in that, The electronic expansion valve also has a rotor assembly (60) and a valve core assembly (30), the rotor assembly (60) driving the valve core assembly (30) to move along the axial direction of the electronic expansion valve (1), and the support member (40) having an internal thread portion and a valve core guide portion, the valve core guide portion being located on the side of the internal thread portion near the first port (101); The inner walls of the support member (40) and the first valve body (10) are transitioned or interference-fitted; And / or, the inner wall of the first valve body (10) has a stepped portion, and the support (40) and the stepped portion are mutually limited and engaged along the axial direction of the electronic expansion valve (1).

17. An air conditioning system, characterized in that, Includes the electronic expansion valve (1) as described in any one of claims 1-16.

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