Electronic expansion valve assembly and electronic expansion valve assembly

Abstract

The embodiment of the invention provides an electronic expansion valve assembly and an electronic expansion valve assembly, and relates to the field of valves, and the electronic expansion valve assembly comprises a valve seat, a valve port, a valve needle body and an anti-rotation piece. The valve port is provided with at least one flowing channel and fixed to the valve seat. The valve needle body is slidably matched with the valve port in the extension direction of the preset axis so as to block or conduct the flow channel; the anti-rotation piece is installed on the valve port and the valve needle body at the same time so as to limit the valve needle body to rotate around the preset axis relative to the valve port. According to the structural design of the expansion valve, abrasion of the valve needle body and the valve port can be reduced, and noise is lowered.

Description

Technical Field

[0001] The present invention relates to the field of valves, and in particular to an electronic expansion valve component and an electronic expansion valve assembly. Background Art

[0002] Generally, the electronic expansion valve includes a rotor assembly, a stop mechanism, a valve needle assembly and a valve seat. The valve seat is provided with a valve port. The rotor assembly is connected to the valve needle assembly, so that the rotor assembly can drive the valve needle assembly to rotate. The stop mechanism is provided with a nut, which is fixed to the valve seat. The nut is provided with an internal threaded hole to cooperate with the external thread of the screw in the valve needle assembly. The screw is driven to rotate by the rotation of the rotor, and the rotational motion is converted into the up and down motion of the screw through the external thread of the screw to control the opening and closing of the valve port. The stop mechanism is used to control the number of rotations of the rotor, thereby controlling the switch position of the valve needle. Among them, the valve needle assembly includes a screw, a screw bushing pressure ring, a screw bushing, a spring, a spring support block and a spring support pad. Because the nut is provided with an internal thread and the nut is fixed to the valve seat, the nut thread cooperates with the external thread of the screw. When the screw rotates, the screw will rotate through the thread to realize the up and down motion of the screw. The screw is connected to the valve needle, and the valve needle cooperates with the valve port, so as to realize the opening and closing effect of the valve needle controlling the valve port.

[0003] The inventors have found in their research that the electronic expansion valve assembly in the prior art has at least the following disadvantages:

[0004] The rotation of the screw rod will drive the spring to rotate, and the compression effect of the spring will generate rotational sliding friction. The friction will drive the valve needle to rotate relative to the valve port. The relative movement of the two will cause wear, resulting in a significant decrease in sealing performance. In addition, the relative rotational movement between the valve needle and the valve port will cause friction noise between the two parts, and sliding friction between the screw rod and the valve needle will also generate friction noise, which seriously affects the noise performance. Summary of the invention

[0005] The objects of the present invention include, for example, providing an electronic expansion valve component and an electronic expansion valve assembly, which can reduce the wear of the valve needle body and the valve port and reduce noise.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, the present invention provides an electronic expansion valve assembly, comprising:

[0008] A valve seat, a valve port, a valve needle body and an anti-rotation component, wherein the valve port is provided with at least one flow channel, and the valve port is fixed to the valve seat; the valve needle body and the valve port are slidably matched in the extension direction of a preset axis to block or conduct the flow channel; the anti-rotation component is installed on the valve port and the valve needle body at the same time to limit the valve needle body from rotating around the preset axis relative to the valve port.

[0009] In an optional embodiment, the valve port is provided with an assembly hole, the assembly hole is connected to the flow channel, the valve needle body is inserted into the assembly hole, and the valve needle body and the assembly hole are slidably matched in the extension direction of the preset axis.

[0010] Based on the above solution, the valve needle body is inserted into the assembly hole and is positioned and guided by the assembly hole. The valve needle body is more stable for linear sliding of the valve port, which is convenient for opening and closing the flow channel.

[0011] In an optional embodiment, a first positioning structure is provided on the circumferential wall of the assembly hole, a second positioning structure is provided on the outer circumferential surface of the valve needle body, and the anti-rotation component is simultaneously inserted into the first positioning structure and the second positioning structure; the anti-rotation component and the valve seat or the valve needle body are slidably matched in the extension direction of the preset axis.

[0012] Based on the above solution, the anti-rotation component is limited by the first positioning structure and the second positioning structure, the installation position of the anti-rotation component is stable and reliable, it is not easy to loosen or shift during use, the failure rate is low, the anti-rotation effect is good, and the service life is long.

[0013] In an optional embodiment, the first positioning structure and the second positioning structure are both configured as anti-rotation grooves, and the anti-rotation member is inserted into the two anti-rotation grooves at the same time.

[0014] Based on the above solution, the anti-rotation component is inserted into the two anti-rotation grooves at the same time and is positioned by the two anti-rotation grooves. The installation method is simple and the assembly efficiency is high.

[0015] In an optional embodiment, the flow channel includes a first flow channel and a second flow channel set at an angle, the first flow channel is connected to the assembly hole, the second flow channel is connected to the first flow channel, and the valve needle body is used to block or open the connection position between the first flow channel and the second flow channel; one end of the first positioning structure is spaced apart from the first flow channel to form a limiting step.

[0016] Based on the above scheme, when processing the anti-rotation groove on the valve port, one end of the anti-rotation groove has a distance from the inner wall of the first flow channel, and a limiting step can be formed at the end of the anti-rotation groove, thereby playing a role in positioning the anti-rotation part, and the anti-rotation part is not easy to fall out of the anti-rotation groove.

[0017] In an optional embodiment, the first positioning structure is configured as a positioning through hole, the second positioning structure is configured as a positioning groove, the anti-rotation component is passed through the positioning through hole and extends into the positioning groove, the anti-rotation component and the positioning groove are slidably matched in the extension direction of the preset axis, and the anti-rotation component and the positioning groove are relatively fixed in the circumferential direction of the preset axis.

[0018] Based on the above scheme, the anti-rotation part is inserted in the positioning through hole, and the positioning through hole is used to realize the positioning of the anti-rotation part and the valve port. The positioning effect is good, the position of the anti-rotation part is stable and reliable, it is not easy to fall off or shift during use, the service life is long, and the anti-rotation effect is good.

[0019] In an optional embodiment, the outer peripheral surface of the valve needle body has a step surface, and one end of the positioning groove extends to the step surface.

[0020] Based on the above scheme, when positioning the groove for processing, the step surface can be used as the processing starting position, which has low processing difficulty and high processing efficiency.

[0021] In an optional embodiment, the anti-rotation member is configured as a pin or a sphere.

[0022] Based on the above solution, the anti-rotation component has a simple structure, can be selected as needed, and has low cost.

[0023] In an optional embodiment, the number of the anti-rotation components is set to be multiple, and the multiple anti-rotation components are arranged at intervals in the circumferential direction of the preset axis.

[0024] Based on the above solution, the anti-rotation effect can be improved by cooperating with multiple anti-rotation parts.

[0025] In a second aspect, the present invention provides an electronic expansion valve assembly, the electronic expansion valve assembly comprising:

[0026] The electronic expansion valve assembly according to any one of the preceding embodiments.

[0027] The beneficial effects of the embodiments of the present invention include, for example:

[0028] To summarize, the electronic expansion valve assembly provided in the present embodiment installs an anti-rotation part between the valve port and the valve needle body. During normal operation, the valve needle body can slide back and forth relative to the valve port in the extension direction of the preset axis, thereby realizing the opening and closing action of the flow channel; at the same time, under the limitation of the anti-rotation part, the rotational freedom of the valve needle body relative to the valve port is restricted, the valve needle body is not easy to rotate relative to the valve port around the preset axis, the valve needle body and the valve port are not easy to generate rotational friction, the two are not easy to wear due to rotation during operation, the sealing performance of the valve needle body and the valve port is good, and the flow control is more accurate; at the same time, since the rotational freedom of the valve needle body and the valve port is restricted, the noise caused by rotation is reduced, and the operation is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 is a cross-sectional view of an electronic expansion valve assembly according to an embodiment of the present application;

[0031] Figure 2 An assembly diagram of an electronic expansion valve assembly according to an embodiment of the present application;

[0032] Figure 3 A schematic diagram of a valve port according to an embodiment of the present application;

[0033] Figure 4 A schematic diagram of a valve needle body according to an embodiment of the present application;

[0034] Figure 5 A schematic diagram of a deformation of an electronic expansion valve assembly according to an embodiment of the present application;

[0035] Figure 6 It is a schematic diagram of a deformation of the first positioning structure of an embodiment of the present application.

[0036] icon:

[0037] 001-preset axis; 100-valve seat; 200-valve port; 201-assembly hole; 202-first flow channel; 203-second flow channel; 210-first positioning structure; 220-flow channel; 300-valve needle body; 310-second positioning structure; 320-step surface; 400-anti-rotation part. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0043] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0044] In the prior art, the screw rod and the valve needle are matched through an elastic member, and the lifting of the screw rod can drive the valve needle to lift and lower through the elastic member, thereby realizing the valve needle controlling the opening and closing of the flow channel on the valve port 200. Since the lifting and lowering motion of the screw rod is obtained through rotation conversion, that is, the screw rod rotates with the magnet, and through the threaded cooperation with the nut, the screw rod also reciprocates in the extension direction of the preset axis 001 while rotating. When the screw rod rotates, the rotational motion will be transmitted to the valve needle through the spring, thereby driving the valve needle to rotate relative to the valve port 200. The valve needle and the valve port 200 rotate relative to each other, causing wear and affecting the sealing performance; in addition, there is also noise when the two rotate.

[0045] In view of this, the designer provides an electronic expansion valve assembly, which can reduce the wear and noise caused by rotational friction by suppressing the relative rotation of the valve needle and the valve port 200.

[0046] Please refer to Figure 1-Figure 6 The present embodiment provides an electronic expansion valve assembly, which includes a valve seat 100, a valve port 200, a valve needle body 300 and an anti-rotation member 400. The valve port 200 is provided with at least one flow channel 220, and the valve port 200 is fixed to the valve seat 100; the valve needle body 300 and the valve port 200 are slidably matched in the extension direction of the preset axis 001 to block or conduct the flow channel 220; the anti-rotation member 400 is installed on the valve port 200 and the valve needle body 300 at the same time to limit the valve needle body 300 from rotating relative to the valve port 200 around the preset axis 001.

[0047] As described above, the working mode of the electronic valve expansion assembly provided in this embodiment is as follows:

[0048] After the electronic expansion valve assembly is started, the valve needle body 300 is driven to slide back and forth in the extension direction of the preset axis 001 relative to the valve seat 100 and the valve port 200 through the cooperation of the screw rod and the spring. When the valve needle body 300 is close to the valve port 200, the flow channel 220 is closed; when the valve needle body 300 is away from the valve port 200, the flow channel 220 is opened, thereby realizing flow regulation and control. It should be understood that by installing the anti-rotation part 400 between the valve port 200 and the valve needle body 300, the rotational freedom of the valve needle body 300 relative to the valve port 200 is restricted, the valve needle body 300 is not easy to rotate around the preset axis 001 relative to the valve port 200, the valve needle body 300 and the valve port 200 are not easy to generate rotational friction, and the two are not easy to wear due to rotation during operation. The sealing performance of the valve needle body 300 and the valve port 200 is good, and the flow control is more accurate; at the same time, since the rotational freedom of the valve needle body 300 and the valve port 200 is restricted, the noise caused by rotation is reduced, and the operation is stable and reliable.

[0049] The following embodiments illustrate the detailed structure of the electronic expansion valve assembly provided in the present application by way of examples.

[0050] Please refer to Figure 1-Figure 2 In this embodiment, the electronic expansion valve assembly optionally includes a valve seat 100, a valve port 200, a valve needle body 300 and an anti-rotation member 400. The valve port 200 is mounted on the valve seat 100, and the valve needle body 300 and the valve port 200 are slidably matched in the extension direction of the preset axis 001. The valve needle body 300 can adjust the on-off state of the valve port 200 during the sliding process to achieve flow regulation. The anti-rotation member 400 is installed on the valve port 200 and the valve needle body 300 at the same time, which can limit the rotational freedom of the valve port 200 and the valve needle body 300, that is, limit the rotation of the valve needle body 300 relative to the valve port 200 around the preset axis 001, reduce wear and reduce noise.

[0051] Optionally, the valve seat 100 is provided with a fixing hole, and the valve port 200 is inserted into the fixing hole. The valve port 200 and the valve seat 100 can be fixed by interference fit or welding.

[0052] Optionally, the valve port 200 is provided with an assembly hole 201 and a flow channel 220, the axis of the assembly hole 201 coincides with the preset axis 001, the flow channel includes a first flow channel 202 and a second flow channel 203 arranged at an angle, the first flow channel 202 passes through the valve port 200 and extends in a direction perpendicular to the preset axis 001, the second flow channel 203 extends in the extension direction of the preset axis 001 and communicates with the first flow channel 202, so that the assembly hole 201 and the second flow channel 203 are located on both sides of the first flow channel 202, and the first flow channel 202 and the second flow channel 203 are arranged substantially vertically. It should be understood that the number of the first flow channels 202 can be multiple, so as to form multiple interfaces, and all the first flow channels 202 are connected to one end of the second flow channel 203, and the valve needle body 300 can open or close the position where the first flow channel 202 and the second flow channel 203 are connected, so as to achieve that multiple first flow channels 202 are connected or blocked with the second flow channel 203 at the same time.

[0053] Please refer to Figure 3 Optionally, a first positioning structure 210 is provided on the valve port 200. The first positioning structure 210 can be configured as an anti-rotation groove. The first positioning structure 210 is provided on the peripheral wall of the assembly hole 201. The first positioning structure 210 can be an arc-shaped groove. The length direction of the first positioning structure 210 is consistent with the extension direction of the preset axis 001.

[0054] Please combine Figure 1 One end of the first positioning structure 210 is located on the end face of the assembly hole 201 away from the first flow channel 202, and the other end of the first positioning structure 210 is spaced apart from the first flow channel 202 so that a limiting step surface is formed at the end of the first positioning structure 210. The anti-rotation component 400 is inserted into the first positioning structure 210, and one end of the anti-rotation component 400 abuts against the limiting step surface. The anti-rotation component 400 is not easy to fall out of the first positioning structure 210, and the installation is stable and reliable.

[0055] Please combine Figure 6 Optionally, the first positioning structure 210 may also be a through groove, that is, one end of the first positioning structure 210 is located on the end surface of the assembly hole 201, and the other end is located on the wall surface of the first flow channel 202. In this way, when processing the first positioning structure 210, the processing can be performed from the end surface of the assembly hole 201 away from the first flow channel 202, and the processing end position is at the first flow channel 202. The processing depth of the first positioning structure 210 is easy to obtain intuitively, the processing difficulty is low, and the processing efficiency is high.

[0056] Please refer to Figure 5 In other embodiments, optionally, the first positioning structure 210 can be set as a positioning through hole, which passes through the valve port 200 in a direction perpendicular to the preset axis 001. The positioning through hole can be a circular hole, and the processing of the positioning through hole is convenient and the processing quality is high.

[0057] Please refer to Figure 4 and Figure 5 Correspondingly, a second positioning structure 310 is provided on the valve needle body 300, and the valve needle body 300 is inserted into the assembly hole 201. The first positioning structure 210 and the second positioning structure 310 cooperate to jointly limit the position of the anti-rotation member 400. At the same time, the valve needle body 300 and the assembly hole 201 are clearance-matched, and when the valve needle body 300 slides relative to the assembly hole 201, it is not easy to contact and rub with the hole wall of the assembly hole 201. It should be understood that when the first positioning structure 210 is an anti-rotation groove, the second positioning structure 310 can also be set as an anti-rotation groove, and the anti-rotation member 400 is inserted into the two anti-rotation grooves at the same time, and the anti-rotation member 400 is slidably matched with one of the two anti-rotation grooves in the extension direction of the preset axis 001. For example, in this embodiment, the anti-rotation member 400 can be fixedly connected to the valve needle body 300, and the anti-rotation member 400 is slidably matched with the first positioning structure 210 in the extension direction of the preset axis 001.

[0058] In addition, when the first positioning structure 210 is a positioning through hole, the second positioning structure 310 is set as a positioning groove, the anti-rotation member 400 is inserted into the positioning through hole and extends into the positioning groove, the anti-rotation member 400 and the positioning groove are slidably matched in the extension direction of the preset axis 001, and the anti-rotation member 400 and the positioning groove are relatively fixed in the circumferential direction of the preset axis 001. The anti-rotation member 400 is inserted into the positioning through hole, and the positioning of the anti-rotation member 400 and the valve port 200 is achieved by relying on the positioning through hole, the positioning effect is good, the position of the anti-rotation member 400 is stable and reliable, it is not easy to fall off and shift during use, the service life is long, and the anti-rotation effect is good.

[0059] It should be understood that no matter the second positioning structure 310 is an anti-rotation groove or a positioning groove, one end of the anti-rotation groove and the positioning groove can be set to be open, and processing can be started from the open part to reduce the difficulty of processing. For example, the outer peripheral surface of the valve needle body 300 has an annular step surface 320, and one end of the second positioning structure 310 starts from the step surface 320. The anti-rotation groove or the positioning groove is processed from the step surface 320, which is convenient to operate.

[0060] In this embodiment, the anti-rotation component 400 can be optionally configured as a pin or a sphere. The structure of the anti-rotation component 400 is flexible and can be selected as needed for easy assembly.

[0061] In this embodiment, the number of anti-rotation components 400 is one. It should be understood that in other embodiments, the number of anti-rotation components 400 is set to multiple, and multiple anti-rotation components 400 are arranged at intervals in the circumferential direction of the preset axis 001. Obviously, the number of first positioning structures 210 on the valve port 200 and the number of second positioning structures 310 on the valve needle body 300 are consistent with the number of anti-rotation components 400, and each first positioning structure 210 cooperates with a corresponding second positioning structure 310 to limit the position of an anti-rotation component 400. Through the cooperation of multiple anti-rotation components 400, the anti-rotation effect can be improved.

[0062] In the electronic expansion valve assembly provided in the present embodiment, the valve port 200 and the valve needle body 300 are limited by the anti-rotation component 400, which can ensure that the valve needle body 300 slides back and forth relative to the valve port 200 in the extension direction of the preset axis 001, thereby realizing the adjustment of the opening and closing action of the valve port 200. It can also limit the rotational freedom of the valve needle body 300 and the valve port 200, prevent the valve needle body 300 from rotating relative to the valve port 200, reduce friction, reduce wear, reduce noise, and improve operating stability.

[0063] This embodiment also provides an electronic expansion valve assembly, including the electronic expansion valve component mentioned in the above embodiment, and obviously, also includes other components to achieve basic functions. In order to avoid repeated description, other basic components of the electronic expansion valve assembly are not described in detail in this embodiment, and reference may be made to existing known structures.

[0064] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An electronic expansion valve assembly, characterized in that: include: A valve seat (100), a valve port (200), a valve needle body (300) and an anti-rotation component (400), wherein the valve port (200) is provided with at least one flow channel (220), and the valve port (200) is fixed to the valve seat (100); the valve needle body (300) and the valve port (200) are slidably matched in the extension direction of a preset axis (001) to block or open the flow channel (220); the anti-rotation component (400) is simultaneously installed on the valve port (200) and the valve needle body (300) to limit the valve needle body (300) from rotating relative to the valve port (200) around the preset axis (001).

2. The electronic expansion valve assembly according to claim 1, characterized in that: The valve port (200) is provided with an assembly hole (201), and the assembly hole (201) is connected to the flow channel (220). The valve needle body (300) is inserted into the assembly hole (201), and the valve needle body (300) and the assembly hole (201) are slidably matched in the extension direction of the preset axis (001).

3. The electronic expansion valve assembly according to claim 2, characterized in that: A first positioning structure (210) is provided on the peripheral wall of the assembly hole (201), a second positioning structure (310) is provided on the outer peripheral surface of the valve needle body (300), and the anti-rotation component (400) is simultaneously inserted into the first positioning structure (210) and the second positioning structure (310); the anti-rotation component (400) and the valve seat (100) or the valve needle body (300) are slidably matched in the extension direction of the preset axis (001).

4. The electronic expansion valve assembly according to claim 3, characterized in that: The first positioning structure (210) and the second positioning structure (310) are both configured as anti-rotation grooves, and the anti-rotation component (400) is inserted into the two anti-rotation grooves at the same time.

5. The electronic expansion valve assembly according to claim 4, characterized in that: The flow channel (220) includes a first flow channel (202) and a second flow channel (203) which are arranged at an angle, wherein the first flow channel (202) is connected to the assembly hole (201), and the second flow channel is connected to the first flow channel (202), and the valve needle body (300) is used to block or conduct the connection position between the first flow channel (202) and the second flow channel (203); one end of the first positioning structure (210) has a distance from the first flow channel (202) to form a limiting step.

6. The electronic expansion valve assembly according to claim 3, characterized in that: The first positioning structure (210) is configured as a positioning through hole, the second positioning structure (310) is configured as a positioning groove, the anti-rotation component (400) is passed through the positioning through hole and extends into the positioning groove, the anti-rotation component (400) and the positioning groove are slidably matched in the extension direction of the preset axis (001), and the anti-rotation component (400) and the positioning groove are relatively fixed in the circumferential direction of the preset axis (001).

7. The electronic expansion valve assembly according to claim 6, characterized in that: The outer peripheral surface of the valve needle body (300) has a step surface (320), and one end of the positioning groove extends to the step surface (320).

8. The electronic expansion valve assembly according to claim 1, characterized in that: The anti-rotation component (400) is configured as a pin or a sphere.

9. The electronic expansion valve assembly according to claim 1, characterized in that: The number of the anti-rotation components (400) is set to be multiple, and the multiple anti-rotation components (400) are arranged at intervals in the circumferential direction of the preset axis (001).

10. An electronic expansion valve assembly, characterized in that: The electronic expansion valve assembly comprises: The electronic expansion valve assembly according to any one of claims 1 to 9.

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