Electronic expansion valve assembly and electronic expansion valve assembly

Abstract

The embodiment of the utility model 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 utility model relates to valve field, specifically, relate to a kind of electronic expansion valve assembly and electronic expansion valve assembly. BACKGROUND

[0002] Generally, electronic expansion valve includes rotor assembly, stop mechanism, valve needle assembly and valve seat, valve seat is provided with valve port, rotor assembly is connected with valve needle assembly, so that rotor assembly can drive valve needle assembly rotation, stop mechanism is equipped with nut, nut is fixed with valve seat, nut is equipped with internal thread hole and the external thread of screw rod in valve needle assembly cooperation, rotate by rotor to drive screw rod rotation, and rotate movement is converted into screw rod up-down movement to control valve port opening and closing by screw rod external thread, stop mechanism is used to control rotor rotation number, to control valve needle switch position. Among them, valve needle assembly includes screw rod, screw rod bushing compression ring, screw rod bushing, spring, spring support block and spring support pad. Because nut is equipped with internal thread and nut is fixed with valve seat, nut thread cooperates with the external thread of screw rod, when screw rod rotates, screw rod will rotate to realize screw rod up-down movement by thread, screw rod is connected with valve needle, and valve needle cooperates with valve port, to realize the opening and closing effect of valve needle control valve port.

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

[0004] The rotation of the screw rod drives the spring to rotate, and the rotating sliding friction force is generated due to the compression of the spring. The friction force drives the valve needle to rotate relative to the valve port. The relative movement of the two causes wear, which significantly reduces the sealing performance. In addition, the relative rotating movement between the valve needle and the valve port causes friction noise between the two, and the sliding friction between the screw rod and the valve needle also causes friction noise, which seriously affects the noise performance. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims to, for example, provide an electronic expansion valve assembly and electronic expansion valve assembly, which can reduce the wear of the valve needle body and the valve port and reduce noise.

[0006] Embodiments of the utility model can be implemented as follows:

[0007] In a first aspect, the utility model provides an electronic expansion valve assembly, which comprises:

[0008] a valve seat, a valve port, a valve needle body and an anti-rotation piece, at least one flow channel is arranged on the valve port, the valve port is fixed on the valve seat, the valve needle body is slidably connected with the valve port in the extension direction of a preset axis to block or conduct the flow channel, and the anti-rotation piece is simultaneously installed on the valve port and the valve needle body to limit the rotation of the valve needle body relative to the valve port around the preset axis.

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

[0010] According to the above scheme, the valve needle body is arranged in the assembly hole and guided by the assembly hole, so that the valve needle body is more stable for linear sliding of the valve port and facilitates opening and closing of the flow channel.

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

[0012] According to the above scheme, the anti-rotation member is limited by the first positioning structure and the second positioning structure, and the installation position of the anti-rotation member is stable and reliable, so that the anti-rotation member is not easy to be loosened and displaced during use, has low failure rate, good anti-rotation effect, and long service life.

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

[0014] According to the above scheme, the anti-rotation member is simultaneously inserted into the two anti-rotation grooves and positioned by the two anti-rotation grooves, so that the installation method is simple and the assembly efficiency is high.

[0015] In an optional embodiment, the flow channel includes an angle-shaped first flow channel and a second flow channel, the first flow channel communicates with the assembly hole, the second flow channel communicates with the first flow channel, and the valve needle body is used to block or guide the communication position of the first flow channel and the second flow channel; one end of the first positioning structure has a spacing from the first flow channel to form a limiting step.

[0016] According to the above scheme, when the anti-rotation groove on the valve port is processed, one end of the anti-rotation groove has a spacing from the inner wall of the first flow channel, a limiting step is formed at the end of the anti-rotation groove, so as to position the anti-rotation member, and the anti-rotation member is not easy to be pulled out of the anti-rotation groove.

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

[0018] According to the above scheme, the anti-rotation piece is inserted into the positioning hole, and the positioning effect is good, the position of the anti-rotation piece is stable and reliable, and the anti-rotation piece is not easy to fall off or shift during use, has a long service life, and has a good anti-rotation effect.

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

[0020] According to the above scheme, the positioning groove can be machined from the stepped surface as a machining starting position, and the machining difficulty is low and the machining efficiency is high.

[0021] In an optional embodiment, the anti-rotation piece is provided as a pin shaft or a ball.

[0022] According to the above scheme, the anti-rotation piece has a simple structure, is selected as needed, and has low cost.

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

[0024] According to the above scheme, the anti-rotation effect can be improved by cooperation of multiple anti-rotation pieces.

[0025] In a second aspect, the utility model provides a kind of electronic expansion valve assembly, and the electronic expansion valve assembly includes:

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

[0027] The beneficial effects of the embodiments of the utility model include, for example:

[0028] As described above, the electronic expansion valve assembly provided by the embodiment can install an anti-rotation piece between the valve port and the valve needle body, and when normally operating, the valve needle body can reciprocate in the extension direction of the preset axis relative to the valve port, to realize the opening and closing action of the flow passage. At the same time, under the limiting of the anti-rotation piece, the rotational freedom of the valve needle body relative to the valve port is limited, and 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 produce rotational friction, and they are not easy to wear due to rotation when operating. 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 limited, the noise caused by rotation is reduced, and the operation is stable and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope, for those skilled in the art, on the premise of not making creative labor, other related drawings can also be obtained according to these drawings.

[0030] Figure 1 The cross-sectional view of the electronic expansion valve assembly of the embodiment of the present application;

[0031] Figure 2 The assembly drawing of the electronic expansion valve assembly of the embodiment of the present application;

[0032] Figure 3 The schematic view of the valve port of the embodiment of the present application;

[0033] Figure 4 The schematic view of the valve needle body of the embodiment of the present application;

[0034] Figure 5 The deformation schematic view of the electronic expansion valve assembly of the embodiment of the present application;

[0035] Figure 6 The deformation schematic view of the first positioning structure of the 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 piece. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application, obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application 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 application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative labor are within the scope of protection of the present application.

[0040] It should be noted that like reference numerals and letters refer to like items in the several views, and that no further definitions and explanations of defined items are needed in the subsequent drawings once an item is defined in one drawing.

[0041] In the description of the utility model, it needs to be explained that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product is used, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0042] In addition, if the terms "first", "second" and the like are used only to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] It should be noted that the features in the embodiments of the utility model can be combined with each other without conflict.

[0044] In the prior art, the screw rod and the valve needle are matched by the elastic member, the screw rod lifting can drive the valve needle lifting through the elastic member, so as to realize the valve needle controlling the opening and closing of the flow channel on the valve port 200. Since the screw rod lifting movement is obtained by rotation, that is, the screw rod rotates together with the magnet, and through the thread cooperation with the nut, the screw rod also reciprocates linearly in the extension direction of the preset axis 001 while rotating. When the screw rod rotates, the rotating movement is transmitted to the valve needle through the spring, so as to drive the valve needle to rotate relative to the valve port 200. The relative rotation of the valve needle and the valve port 200 causes wear, which affects the sealing performance. In addition, the rotation of the two also produces noise.

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

[0046] Please refer to Figures 1-6 The embodiment provides an electronic expansion valve assembly which comprises 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 is slidably matched with the valve port 200 in the extension direction of the preset axis 001, so as 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, so as to limit the rotation of the valve needle body 300 around the preset axis 001 relative to the valve port 200.

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

[0048] After the electronic expansion valve assembly is started, the valve needle body 300 is driven to reciprocate relative to the valve seat 100 and the valve port 200 in the extension direction of the preset axis 001 through the cooperation of the screw rod and the spring, when the valve needle body 300 approaches the valve port 200, the flow passage 220 is closed; when the valve needle body 300 is away from the valve port 200, the flow passage 220 is opened, in this way, flow regulation and control are realized. It should be understood that by installing the anti-rotation piece 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 limited, the valve needle body 300 is not easy to rotate relative to the valve port 200 around the preset axis 001, the valve needle body 300 and the valve port 200 are not easy to produce rotational friction, and the two are not easy to wear due to rotation when running, 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 limited, 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 example.

[0050] Please refer to Figures 1-2 In the present embodiment, the electronic expansion valve assembly, which is optional, comprises a valve seat 100, a valve port 200, a valve needle body 300 and an anti-rotation piece 400. The valve port 200 is installed on the valve seat 100, the valve needle body 300 is slidably connected with the valve port 200 in the extension direction of the preset axis 001, and the valve needle body 300 can adjust the on-off state of the valve port 200 during sliding to realize flow regulation. The anti-rotation piece 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 noise.

[0051] Optionally, the valve seat 100 is provided with a fixing hole, and the valve port 200 is arranged in the fixing hole, and the valve port 200 and the valve seat 100 can be interference fit or welded.

[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 an angle arranged first flow channel 202 and a second flow channel 203, the first flow channel 202 penetrates 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, in this way, 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 perpendicularly. It should be understood that the number of first flow channels 202 can be multiple, thereby forming multiple interfaces, and all the first flow channels 202 communicate with 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 communicate, thereby realizing that multiple first flow channels 202 simultaneously communicate or block with the second flow channel 203.

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

[0054] Please refer to 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 has a spacing with the first flow channel 202, so that the end of the first positioning structure 210 forms a limiting step surface, the anti-rotation piece 400 is inserted in the first positioning structure 210, one end of the anti-rotation piece 400 abuts against the limiting step surface, and the anti-rotation piece 400 is not easy to come out of the first positioning structure 210, and the installation is stable and reliable.

[0055] Please refer to Figure 6 Optionally, the first positioning structure 210 can also be a through groove, that is, one end of the first positioning structure 210 is located on the end face 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 the first positioning structure 210 is machined, it can be machined from the end face of the assembly hole 201 away from the first flow channel 202, and the machining termination position is at the first flow channel 202, so that the machining depth of the first positioning structure 210 is easy to intuitively obtain, the machining difficulty is low, and the machining efficiency is high.

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

[0057] Please refer to Figure 4 and Figure 5 Correspondingly, the second positioning structure 310 is arranged on the valve needle body 300, the valve needle body 300 is arranged in the assembly hole 201, and the first positioning structure 210 and the second positioning structure 310 cooperatively limit the position of the anti-rotation piece 400. At the same time, the valve needle body 300 and the assembly hole 201 are in clearance fit, and the valve needle body 300 is not easy to contact and rub with the hole wall of the assembly hole 201 when sliding relative to 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 arranged as an anti-rotation groove, the anti-rotation piece 400 is inserted in the two anti-rotation grooves at the same time, and the anti-rotation piece 400 is slidably fitted with one of the two anti-rotation grooves in the extension direction of the preset axis 001. For example, in the embodiment, the anti-rotation piece 400 can be fixedly connected with the valve needle body 300, and the anti-rotation piece 400 is slidably fitted 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 arranged as a positioning groove, the anti-rotation piece 400 is arranged in the positioning through hole and extends into the positioning groove, the anti-rotation piece 400 is slidably fitted with the positioning groove in the extension direction of the preset axis 001, and the anti-rotation piece 400 is relatively fixed with the positioning groove in the circumferential direction of the preset axis 001. The anti-rotation piece 400 is inserted in the positioning through hole, and the positioning through hole is used to position the anti-rotation piece 400 and the valve port 200, so that the positioning effect is good, the position of the anti-rotation piece 400 is stable and reliable, the anti-rotation piece 400 is not easy to fall off and displace during use, the service life is long, and the anti-rotation effect is good.

[0059] It should be understood that no matter whether 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 arranged as an open end, and the anti-rotation groove or the positioning groove can be machined from the open end, so that the machining difficulty is reduced. For example, the outer circumferential surface of the valve needle body 300 has an annular stepped surface 320, one end of the second positioning structure 310 starts from the stepped surface 320, and the anti-rotation groove or the positioning groove is machined from the stepped surface 320, so that the operation is convenient.

[0060] In the embodiment, optionally, the anti-rotation piece 400 can be arranged as a pin shaft or a ball, and the structure of the anti-rotation piece 400 is flexible and can be selected as needed, so that the assembly is facilitated.

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

[0062] The electronic expansion valve assembly provided in the embodiment can limit the rotation degree of 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 operation stability.

[0063] The embodiment also provides an electronic expansion valve assembly, which includes the electronic expansion valve assembly mentioned in the above-mentioned embodiments and obviously includes other components for realizing basic functions. In order to avoid repeated and tedious description, other basic components of the electronic expansion valve assembly are not described in detail in the embodiment, and can be referred to the existing known structures.

[0064] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electronic expansion valve assembly, characterized by, The valve seat (100), the valve port (200), the valve needle body (300) and the anti-rotation piece (400), the valve port (200) is provided with at least one flow channel (220), 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), so as to block or conduct the flow channel (220); the anti-rotation piece (400) is installed on the valve port (200) and the valve needle body (300) at the same time, so as to limit the rotation of the valve needle body (300) around the preset axis (001) relative to the valve port (200).

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

3. The electronic expansion valve assembly according to claim 2, wherein: The assembly hole (201) is provided with a first positioning structure (210) on the hole peripheral wall, the valve needle body (300) is provided with a second positioning structure (310) on the outer peripheral surface, and the anti-rotation piece (400) is arranged in the first positioning structure (210) and the second positioning structure (310) at the same time; the anti-rotation piece (400) is slidably matched with the valve seat (100) or the valve needle body (300) in the extension direction of the preset axis (001).

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

5. The electronic expansion valve assembly according to claim 4, wherein: The flow channel (220) comprises an angle-shaped first flow channel (202) and a second flow channel (203), the first flow channel (202) communicates with the assembly hole (201), the second flow channel communicates with the first flow channel (202), and the valve needle body (300) is arranged at a position for blocking or conducting the communication of the first flow channel (202) and the second flow channel (203); one end of the first positioning structure (210) is spaced apart from the first flow channel (202) to form a limiting step.

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

7. The electronic expansion valve assembly of claim 6, wherein: An outer circumferential surface of the valve needle body (300) has a stepped surface (320), and one end of the positioning groove extends to the stepped surface (320).

8. The electronic expansion valve assembly of claim 1, wherein: The anti-rotation member (400) is arranged as a pin shaft or a ball.

9. The electronic expansion valve assembly of claim 1, wherein: A plurality of anti-rotation members (400) are arranged in the circumferential direction of the preset axis (001).

10. An electronic expansion valve assembly characterized by, The electronic expansion valve assembly comprises: The electronic expansion valve assembly of any one of claims 1-9.

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