Electronic expansion valve and air conditioner

Abstract

The application relates to the technical field of air conditioners, and discloses an electronic expansion valve and an air conditioner. The electronic expansion valve provided by the application comprises a valve body, a throttling hole is arranged in the valve body, a first valve needle is movably arranged in the valve body, a flow guide channel and at least one flow guide hole are arranged on the first valve needle, the at least one flow guide hole is communicated with the flow guide channel, a second valve needle is movably arranged in the flow guide channel to control the flow guide hole to be communicated with or disconnected from the flow guide channel, a driving assembly is connected with the second valve needle, and the driving assembly drives the second valve needle to move when the first valve needle is limited to move in the throttling hole, so that the flow guide hole is communicated with the throttling hole. When the first valve needle is stuck in the throttling hole, the second valve needle is driven to move by the driving assembly, so that the flow guide hole is communicated with the throttling hole through the flow guide channel, and the working medium can flow through the flow guide channel and the flow guide hole, thereby solving the problem that the electronic expansion valve cannot operate when the valve needle is stuck.

Description

Technical Field

[0001] This application belongs to the field of air conditioner technology, and particularly relates to electronic expansion valves and air conditioners. Background Technology

[0002] An electronic expansion valve is a control element that precisely regulates the flow rate of a working fluid using an electronic controller. In related technologies, an electronic expansion valve includes a valve body, a valve needle, and an electronic controller. The valve body has a throttling orifice, and the electronic controller controls the valve needle to extend or retract from the orifice to control its opening. However, throttling valves in related technologies require high cleanliness of the working fluid. When the working fluid contains impurities, the valve needle can easily become stuck in the orifice, affecting the operation of the electronic expansion valve.

[0003] Therefore, improvements to existing technologies are necessary.

[0004] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0005] This application provides an electronic expansion valve and an air conditioner to solve the problem that the electronic expansion valve cannot operate when the valve needle is stuck.

[0006] In a first aspect, embodiments of this application provide an electronic expansion valve, comprising: Valve body, wherein a throttling orifice is provided in the valve body; A first valve needle is movably disposed within the valve body. The first valve needle has a flow guiding channel and at least one flow guiding hole, and the at least one flow guiding hole is connected to the flow guiding channel. The second valve needle is movably disposed within the flow guiding channel to control the flow guiding hole to connect or disconnect from the flow guiding channel; A drive assembly, which is connected to the second valve needle; When the first valve needle is restricted in its movement within the throttling orifice, the drive assembly drives the second valve needle to move so that the guide orifice communicates with the throttling orifice through the guide channel.

[0007] In one possible implementation, the side of the second valve needle is provided with an external thread, the wall of the flow channel is provided with an internal thread, the second valve needle is threadedly engaged with the flow channel, and the drive assembly is used to drive the second valve needle to rotate.

[0008] In one possible implementation, the drive assembly includes a drive element, a base, and a screw. The base is fixedly disposed within the valve body, and the screw is threadedly connected to the base. One end of the screw is connected to the drive element, and the other end is connected to the second valve needle.

[0009] In one possible implementation, the drive component includes a stator and a rotor, the stator being disposed on the outer wall of the valve body, the rotor being disposed within the valve body, and the screw being fixedly connected to the rotor.

[0010] In one possible implementation, the base includes a base plate portion and a support portion, the rotor is movably sleeved on the support portion, and the screw passes through the base plate portion and the support portion in sequence.

[0011] In one possible implementation, a limiting seat is provided on the side of the base near the first valve needle, the limiting seat having a limiting groove, and a limiting block is provided on the side of the first valve needle near the base.

[0012] In one possible implementation, the rotation direction of the external thread of the second valve needle is opposite to the rotation direction of the external thread of the screw.

[0013] In one possible implementation, the valve body has a valve cavity, the valve cavity wall is provided with a valve seat, and the throttling orifice is opened on the valve seat.

[0014] In one possible implementation, the valve body is provided with a first connecting pipe and a second connecting pipe, the first connecting pipe being connected to one end of the throttling orifice, and the second connecting pipe being connected to the other end of the throttling orifice.

[0015] Secondly, embodiments of this application also provide an air conditioner, the air conditioner including the electronic expansion valve as described in any of the preceding claims.

[0016] Compared with the prior art, this application has the following beneficial effects: The electronic expansion valve provided in this application embodiment, by setting a first valve needle, enables control over the extent to which the first valve needle extends into the throttling orifice to control the opening of the throttling orifice; by opening a flow guiding channel and a flow guiding orifice on the first valve needle, a second valve needle is movably disposed within the flow guiding channel, so that when the first valve needle is stuck in the throttling orifice, the second valve needle is driven to move by a drive component, so that the flow guiding orifice communicates with the throttling orifice through the flow guiding channel, and the working fluid can flow through the flow guiding channel and the flow guiding orifice, so that the electronic expansion valve can continue to operate, thus solving the problem that the electronic expansion valve cannot operate when the valve needle is stuck. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0019] Figure 1 This is a schematic cross-sectional view of the electronic expansion valve provided in an embodiment of this application.

[0020] Figure 2 This is a second cross-sectional view of the electronic expansion valve provided in an embodiment of this application.

[0021] In the figure: 1. Valve body; 11. Valve cavity; 12. Throttling orifice; 13. Valve seat; 14. First connecting pipe; 15. Second connecting pipe; 2. First valve needle; 21. Flow guide channel; 22. Flow guide orifice; 23. Limiting block; 3. Second valve needle; 4. Drive assembly; 41. Stator; 42. Rotor; 43. Base; 44. Screw; 5. Limiting seat; 51. Limiting groove. Detailed Implementation

[0022] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0023] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0024] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0025] This application provides an electronic expansion valve and an air conditioner to solve the problem that the electronic expansion valve cannot operate when the valve needle is stuck. The following description will be provided in conjunction with the accompanying drawings.

[0026] Please see Figure 1This application provides an electronic expansion valve, including a valve body 1, a first valve needle 2, a second valve needle 3, and a drive assembly 4. The valve body 1 has a throttling orifice 12. The first valve needle 2 is movably disposed within the valve body 1, and has a flow guiding channel 21 and at least one flow guiding orifice 22. The at least one flow guiding orifice 22 communicates with the flow guiding channel 21. The second valve needle 3 is movably disposed within the flow guiding channel 21 to control the connection or disconnection between the flow guiding orifice 22 and the flow guiding channel 21. The drive assembly 4 is connected to the second valve needle 3. When the first valve needle 2's movement is restricted within the throttling orifice 12, the drive assembly 4 drives the second valve needle 3 to move, so that the flow guiding orifice 22 communicates with the throttling orifice 12 through the flow guiding channel 21.

[0027] By setting the first valve needle 2, the extent to which the first valve needle 2 extends into the throttle orifice 12 can be controlled to control the opening of the throttle orifice 12. By opening a flow guide channel 21 and a flow guide hole 22 on the first valve needle 2, the second valve needle 3 is movably set in the flow guide channel 21. Thus, when the first valve needle 2 is stuck in the throttle orifice 12, the second valve needle 3 is driven to move by the drive component 4, so that the flow guide hole 22 is connected to the throttle orifice 12 through the flow guide channel 21. The working fluid can flow through the flow guide channel 21 and the flow guide hole 22, so that the electronic expansion valve can continue to operate, thus solving the problem that the electronic expansion valve cannot operate when the valve needle is stuck.

[0028] Please see Figure 1 In this embodiment, the valve body 1 has a valve cavity 11, and the first valve needle 2 and the second valve needle 3 are both disposed within the valve cavity 11. A valve seat 13 is disposed on the cavity wall of the valve cavity 11, and a throttling orifice 12 is formed on the valve seat 13. In this embodiment, the throttling orifice 12 is a circular hole. A first connecting pipe 14 and a second connecting pipe 15 are also integrally formed on the valve body 1. Both the first and second connecting pipes communicate with the valve cavity 11. The first connecting pipe 14 communicates with one end of the throttling orifice 12, and the second connecting pipe 15 communicates with the other end of the throttling orifice 12. When the electronic expansion valve is installed in an air conditioning system, the first connecting pipe 14 communicates with the condenser, and the second connecting pipe 15 communicates with the evaporator.

[0029] Please see Figure 1 Both the flow channel 21 and the flow hole 22 are circular channels. The flow channel 21 passes through the first valve needle 2 along the length direction of the first valve needle 2. The core axis of the flow hole 22 is perpendicular to the core axis of the flow channel 21. In this embodiment, the number of flow holes 22 is set to three groups. The three groups of flow holes 22 are arranged sequentially at intervals along the length direction of the first valve needle 2. Each group of flow holes 22 includes multiple flow holes 22. The multiple flow holes 22 in the same group are sequentially opened at intervals along the circumference of the first valve needle 2. Each flow hole 22 is connected to the flow channel 21 so that the working fluid can flow from the flow hole 22 to the flow channel 21 or from the flow channel 21 to the flow hole 22.

[0030] Please see Figure 1 The second valve needle 3 has an integrally formed external thread on its side and an integrally formed internal thread on the wall of the flow channel 21. The second valve needle 3 is threadedly engaged with the flow channel 21. The drive assembly 4 is used to drive the second valve needle 3 to rotate. When the first valve needle 2 is restricted in its movement within the throttling orifice 12, the drive assembly 4 drives the second valve needle 3 to rotate, allowing the second valve needle 3 to rotate relative to the first valve needle 2, thereby enabling the flow channel 22 to communicate with the throttling orifice 12 through the flow channel 21.

[0031] Please see Figure 1 The drive assembly 4 includes a drive component, a base 43, and a screw 44. Both the base 43 and the screw 44 are disposed within the valve cavity 11. Specifically, the base 43 is fixedly connected to the cavity wall of the valve cavity 11, and the screw 44 passes through the base 43 and is threadedly connected to it. One end of the screw 44 is connected to the drive component, and the other end is fixedly connected to the second valve needle 3. The spindle axis of the screw 44 coincides with the spindle axis of the second valve needle 3, and the rotation direction of the external thread of the second valve needle 3 is opposite to the rotation direction of the external thread of the screw 44. The drive component includes a stator 41 and a rotor 42. The stator 41 is fixedly connected to the outer wall of the valve body 1, and the rotor 42 is disposed within the valve body 1. The rotor 42 can rotate under the action of the stator 41, and the screw 44 is fixedly connected to the rotor 42. The base 43 includes a base plate portion and a support portion. The rotor 42 is movably sleeved on the support portion, and the screw 44 passes through the base plate portion and the support portion in sequence.

[0032] When the rotor 42 rotates, the screw 44 is threadedly connected to the base 43, and the second valve needle 3 is rotatably connected to the first valve needle 2. This allows the rotor 42, screw 44, and first valve needle 2 to move as a whole along the axis of the spindle, thereby enabling the first valve needle 2 to extend into or retract from the throttling orifice 12. When the first valve needle 2 is stuck in the guide hole 22, by rotating the rotor 42 in the opposite direction, the rotor 42, screw 44, and second valve needle 3 can move as a whole along the axis of the spindle. This allows the guide hole 22 to communicate with the throttling orifice 12 through the guide channel 21, solving the problem of the electronic expansion valve failing to operate when the valve needle is stuck.

[0033] Please see Figure 2 In some embodiments of this application, the screw 44 is integrally formed with the valve needle. A limiting seat 5 is provided on the side of the base 43 near the first valve needle 2, and a limiting groove 51 is formed on the limiting seat 5. A limiting block 23 is fixedly connected to the side of the first valve needle 2 near the base 43, and the limiting block 23 can be inserted into the limiting groove 51. Under some extreme working conditions, if the first valve needle 2 still cannot meet the working fluid flow requirements after moving to the limiting block 23 being inserted into the limiting groove 51, the rotor 42 is controlled to continue to rotate in the opposite direction, so that the guide hole 22 and the guide channel 21 can be connected, thereby continuing to increase the opening of the electronic expansion valve.

[0034] This application also provides an air conditioner that includes the electronic expansion valve as described above. Since this air conditioner has the aforementioned electronic expansion valve, it possesses at least some or all of the beneficial effects of the electronic expansion valve, which will not be elaborated upon here.

[0035] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0036] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. An electronic expansion valve, characterized in that, include: Valve body (1), wherein a throttling orifice (12) is provided inside the valve body (1); A first valve needle (2) is movably disposed within the valve body (1). The first valve needle (2) has a flow channel (21) and at least one flow hole (22) on it, and the at least one flow hole (22) is connected to the flow channel (21). The second valve needle (3) is movably disposed within the flow channel (21) to control the flow hole (22) to connect or disconnect from the flow channel (21); A drive assembly (4) is connected to the second valve needle (3); When the first valve needle (2) is restricted in its movement within the throttle orifice (12), the drive assembly (4) drives the second valve needle (3) to move so that the guide orifice (22) communicates with the throttle orifice (12) through the guide channel (21).

2. The electronic expansion valve according to claim 1, characterized in that, The second valve needle (3) has an external thread on its side and an internal thread on the wall of the flow channel (21). The second valve needle (3) is threadedly engaged with the flow channel (21). The drive assembly (4) is used to drive the second valve needle (3) to rotate.

3. The electronic expansion valve according to claim 2, characterized in that, The drive assembly (4) includes a drive element, a base (43) and a screw (44). The base (43) is fixedly disposed inside the valve body (1). The screw (44) is threadedly connected to the base (43). One end of the screw (44) is connected to the drive element, and the other end is connected to the second valve needle (3).

4. The electronic expansion valve according to claim 3, characterized in that, The driving component includes a stator (41) and a rotor (42). The stator (41) is disposed on the outer wall of the valve body (1), and the rotor (42) is disposed inside the valve body (1). The screw (44) is fixedly connected to the rotor (42).

5. The electronic expansion valve according to claim 4, characterized in that, The base (43) includes a base plate portion and a support portion, the rotor (42) is movably sleeved on the support portion, and the screw (44) passes through the base plate portion and the support portion in sequence.

6. The electronic expansion valve according to claim 3, characterized in that, A limiting seat (5) is provided on the side of the base (43) near the first valve needle (2), and a limiting groove (51) is provided on the limiting seat (5). A limiting block (23) is provided on the side of the first valve needle (2) near the base (43).

7. The electronic expansion valve according to claim 3, characterized in that, The rotation direction of the external thread of the second valve needle (3) is opposite to the rotation direction of the external thread of the screw (44).

8. The electronic expansion valve according to claim 1, characterized in that, The valve body (1) is provided with a valve cavity (11), and a valve seat (13) is provided on the cavity wall of the valve cavity (11). The throttling hole (12) is opened on the valve seat (13).

9. The electronic expansion valve according to claim 1, characterized in that, The valve body (1) is provided with a first connecting pipe (14) and a second connecting pipe (15). The first connecting pipe (14) is connected to one end of the throttling orifice (12), and the second connecting pipe (15) is connected to the other end of the throttling orifice (12).

10. An air conditioner, characterized in that, The air conditioner includes an electronic expansion valve as described in any one of claims 1-9.

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