A New Type of Electronic Expansion Valve

Abstract

The present invention discloses a novel electronic expansion valve, comprising a valve seat, a bearing seat, a rotor sleeve, a limit dynamic spring and a limit static spring, wherein a through groove which passes through from top to bottom is formed on the valve seat, a matching bearing seat is inserted into the through groove, a rotor sleeve is arranged in the bearing seat, a matching straight pipe is welded at the bottom end of the through groove, a side hole communicating with the through groove is arranged on the outer wall of the valve seat, a matching bent pipe is welded to the side hole, and the valve seat is characterized in that: a static spring fixing plate is also included; the present invention can solve the shortcomings existing in the prior art, not only is the installation simple, and the production efficiency is improved, but also in the event of an operational error, rework can be performed, thereby reducing the cost of parts.

Description

Technical Field

[0001] The invention relates to a novel electronic expansion valve. Background Art

[0002] In the existing electronic expansion valve's limiting device, such as the invention patent with authorization announcement number CN102454819B, when positioning the lower end of the limiting spring, the structure of the nut is complicated, and the lower end of the limiting spring is bent many times, resulting in a waste of time in the installation process and reduced production efficiency; at the same time, as in the invention patent with authorization announcement number CN104913098A, although the limiting structure is simple, it still needs to be welded and fixed during the further assembly process. In order to change the existing electronic expansion valve's limiting device, the electronic expansion valve's limiting device is convenient and simple during the installation process, which is conducive to improving production efficiency and reducing parts costs. Based on this, a new type of electronic expansion valve was invented. Summary of the invention

[0003] The purpose of the present invention is to provide a new electronic expansion valve that can solve the shortcomings and technical problems mentioned in the above background technology.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] A new type of electronic expansion valve, including a valve seat, a bearing seat, a rotor sleeve, a limit dynamic spring and a limit static spring, a through groove which runs through from top to bottom is formed on the valve seat, a matching bearing seat is inserted into the through groove, a rotor sleeve is arranged in the bearing seat, a matching straight pipe is welded at the bottom end of the through groove, a side hole communicating with the through groove is arranged on the outer wall of the valve seat, a matching bent pipe is welded to the side hole, and the valve seat also includes a static spring fixing plate.

[0006] The present invention is further configured such that the static spring fixing plate is located at the upper end surface of the valve seat and is used to fix the limit static spring.

[0007] The present invention is further configured such that the static spring fixing plate includes a plate body, an inner hole is formed in the middle of the plate body, 36 teeth that are evenly distributed and of the same size are formed around the outer edge of the plate body, a fixing hole is formed on the plate body, the end face of the fixing hole is perpendicular to the plane of the plate body and is connected, and the plate body is located outside the inner hole.

[0008] The present invention is further configured such that a positioning notch is provided on the upper end surface of the valve seat, and the positioning notch is used to position the static spring fixing plate. The inner hole size of the static spring fixing plate is the same as the outer diameter size of the bearing seat, and the static spring fixing plate is installed on the upper end surface of the valve seat and is coaxial with the bearing seat.

[0009] The present invention is further configured such that a coaxially mounted static limit spring is provided on the outer wall of the bearing seat, the static limit spring is fixed to the fixing hole of the static spring fixing plate, and a dynamic limit spring is embedded in the spiral groove of the static limit spring.

[0010] The present invention is further configured such that the limit static spring has an upper stop portion, a lower stop portion and a spiral guide portion, the upper stop portion is located at the upper end of the spiral guide portion, the lower stop portion is located at the lower end of the spiral guide portion, and the positioning handle connected to the lower stop portion is embedded in the fixing hole of the static spring fixing plate.

[0011] The present invention is further configured such that the rotor sleeve is composed of a valve stem and a magnetic rotor, and an external thread section is formed at the middle end of the outer wall of the valve stem.

[0012] The present invention is further configured such that the bearing seat includes a seat body, a through hole is formed in the seat body, the through hole matches the valve stem, an internal thread section matching the external thread section is formed in the middle of the inner wall of the through hole, and a shaft retaining ring groove is formed in the middle of the outer wall of the seat body.

[0013] The present invention is further configured to include a C-shaped open retaining ring, wherein the C-shaped open retaining ring is embedded in the shaft retaining ring groove, and the inner diameter of the C-shaped open retaining ring is the same as the inner diameter of the shaft retaining ring groove.

[0014] The present invention is further configured such that when the tail of the limit movable spring is located at the lower stop portion of the limit static spring and the closing point of the electronic expansion valve is determined, the handle of the limit movable spring contacts the lower portion of the limit rib of the magnetic rotor, and at the same time, a special tool is used to press the positioning notch of the valve seat and the corresponding tooth above into the positioning notch.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention adds a static spring fixing plate, and a fixing hole and a plurality of teeth are provided on the static spring fixing plate. The fixing hole can position the static limit spring and the dynamic limit spring, and the method is simple, reliable and easy to assemble. When the opening point of the electronic expansion valve is determined, the present invention fixes a tooth of the static spring fixing plate with a positioning notch on the valve seat, thereby quickly improving production efficiency. When an installation error occurs, the pressed teeth can be pried off and repositioned, so that repairs can be performed during the installation error, without wasting parts and saving costs. Compared with the prior art, the overall structure is simplified and the cost is greatly reduced.

[0017] It can be seen from the above that the present invention can solve the shortcomings of the prior art, and is not only simple to install and improves production efficiency, but also allows rework in the event of operational errors, thereby reducing parts costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0019] Figure 1 It is a schematic structural diagram of the electronic expansion valve limit device of the present invention before positioning.

[0020] Figure 2 It is a schematic structural diagram of the electronic expansion valve limiting device after positioning according to the present invention.

[0021] Figure 3 It is a structural schematic diagram of the valve seat in the present invention.

[0022] Figure 4 for Figure 3 Cross-section view along the AA direction.

[0023] Figure 5 It is a structural schematic diagram of the bearing seat in the present invention and its cross-sectional view along the BB direction.

[0024] Figure 6 It is a schematic diagram of the structure of the rotor sleeve in the present invention and a cross-sectional view thereof in the CC direction.

[0025] Figure 7 It is a structural schematic diagram of the static spring fixing plate in the present invention.

[0026] Figure 8 It is a schematic diagram of the structure of the static limit spring in the present invention.

[0027] Fig. 9 It is a schematic structural diagram of the limit spring in the present invention. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9As shown, a position limiting structure device on an electronic expansion valve comprises a valve seat 1, a bearing seat 4, a rotor sleeve 5, a position limiting dynamic spring 8, a position limiting static spring 7 and a static spring fixing plate 6. A through groove 13 is formed on the valve seat 1, a matching bearing seat 4 is inserted into the through groove 13, a rotor sleeve 5 is arranged in the bearing seat 4, a matching straight pipe 3 is welded at the bottom end of the through groove 13, a side hole communicating with the through groove is arranged on the outer wall of the valve seat, a matching bent pipe 2 is welded to the side hole, and the characteristic is that: it also comprises a static spring fixing plate 6, the static spring fixing plate 6 is located at the upper end surface of the valve seat 1, and is used to fix the position limiting static spring 7.

[0030] In the present invention, a positioning notch 11 is provided on the upper end surface 11 of the valve seat 1, and the positioning notch 11 is used to position the static spring fixing plate 6. An inner hole 63 is provided on the static spring fixing plate 6. The size of the inner hole 63 is the same as the outer diameter of the bearing seat 4, and it is installed on the upper end surface 12 of the valve seat 1 and is coaxial with the bearing seat 4.

[0031] In the present invention, a coaxially mounted static limit spring 7 is provided on the outer wall of the bearing seat 4 , the static limit spring 7 is fixed on the fixing hole 62 of the static spring fixing plate 6 , and a dynamic limit spring 8 is embedded in the spiral groove of the static limit spring 7 .

[0032] In the present invention, the limit static spring 7 has an upper stop portion 72, a lower stop portion 73 and a spiral guide portion 71, the upper stop portion 72 is located at the upper end of the spiral guide portion 71, the lower stop portion 73 is located at the lower end of the spiral guide portion 71, and the positioning handle 74 connected to the lower stop portion 73 is embedded in the fixing hole 62 of the static spring fixing plate 6.

[0033] In the present invention, the static spring fixing plate 6 includes a plate body, an inner hole 63 is formed in the middle of the plate body, 36 teeth 61 that are evenly distributed and of the same size are formed around the outer edge of the plate body, a fixing hole 62 is formed on the plate body, the end face of the fixing hole 62 is perpendicular to the plane of the plate body and is connected, and the plate body is located outside the inner hole 63.

[0034] The rotor sleeve 5 in the present invention is composed of a valve stem 52 and a magnetic rotor 51 , and an external thread section 521 is formed at the middle end of the outer wall of the valve stem 52 .

[0035] In the present invention, the bearing seat 4 includes a seat body, a through hole 41 is formed in the seat body, the through hole 41 matches the valve stem 52, an internal thread section 42 matching the valve stem external thread section 521 is formed in the middle of the inner wall of the through hole 41, a shaft retaining ring groove 43 is formed in the middle of the outer wall of the seat body, and a C-shaped open retaining ring is embedded in the shaft retaining ring groove, and the inner diameter of the C-shaped open retaining ring is the same as the inner diameter of the shaft retaining ring groove. The C-shaped open retaining ring is embedded in the shaft retaining ring groove in the middle of the bearing seat 4, and its main purpose is to prevent the static spring fixing plate from moving upward and to position the static spring fixing plate.

[0036] In the present invention, when the tail of the limit movable spring 8 is located at the lower stop portion 73 of the limit static spring 7 and the closing point of the electronic expansion valve is determined, the handle 81 of the limit movable spring 8 contacts the lower portion of the limit rib 511 of the magnetic rotor 51, and at the same time, a special tool is used to press down a tooth 61 in the static spring fixing plate 6 and fix it on the positioning notch 11 of the valve seat 1.

[0037] The present invention adds a static spring fixing plate 6, and a fixing hole 62 and a plurality of teeth 61 are provided on the static spring fixing plate 6. The fixing hole 62 can position the limit static spring 7 and the limit dynamic spring 8, which is simple, reliable and easy to assemble. When the valve opening point of the electronic expansion valve is determined, the present invention quickly improves production efficiency by fixing a tooth 61 of the static spring fixing plate 6 with the positioning notch 11 on the valve seat 1. If the valve opening point is positioned incorrectly, a tooth 61 that has been pressed down can be pried open and repositioned. The overall operation is convenient and the efficiency is greatly improved. The entire operation process is simple, and there is no need to weld or modify the positioning handle 74 on the limit static spring 7, which protects the entire valve seat 1 and the limit static spring 7. It is only necessary to rotate the static spring fixing plate 6. Even if the teeth on the static spring fixing plate 6 are used up, it is still very convenient.

[0038] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable ordinary technicians in the field to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made based on the essence of the content of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel electronic expansion valve, comprising a valve seat, a bearing seat, a rotor sleeve, a limit spring and a limit static spring, wherein a through groove is formed on the valve seat, a matching bearing seat is inserted into the through groove, a rotor sleeve is arranged in the bearing seat, a matching straight pipe is welded at the bottom end of the through groove, a side hole communicating with the through groove is arranged on the outer wall of the valve seat, a matching bent pipe is welded to the side hole, and the characteristics are: Also included is a static spring fixing plate; The static spring fixing plate includes a plate body, an inner hole is formed in the middle of the plate body, 36 teeth are evenly distributed and of the same size are formed around the outer edge of the plate body, a fixing hole is formed on the plate body, the end surface of the fixing hole is perpendicular to the plane of the plate body and connected, and the plate body is located outside the inner hole; The upper end surface of the valve seat is provided with a positioning notch, which is used to position the static spring fixing plate. The inner hole size of the static spring fixing plate is the same as the outer diameter size of the bearing seat, and the static spring fixing plate is installed on the upper end surface of the valve seat and is coaxial with the bearing seat.

2. According to claim 1, a novel electronic expansion valve is characterized in that: The static spring fixing plate is located at the upper end surface of the valve seat and is used to fix the limit static spring.

3. According to the novel electronic expansion valve of claim 1, it is characterized by: A coaxially mounted static limit spring is provided on the outer wall of the bearing seat. The static limit spring is fixed to a fixing hole of the static spring fixing plate, and a dynamic limit spring is embedded in a spiral groove of the static limit spring.

4. According to the novel electronic expansion valve of claim 1, it is characterized by: The limit static spring is provided with an upper stop portion, a lower stop portion and a spiral guide portion, the upper stop portion is located at the upper end of the spiral guide portion, the lower stop portion is located at the lower end of the spiral guide portion, and the positioning handle connected to the lower stop portion is embedded in the fixing hole of the static spring fixing plate.

5. According to claim 1, the novel electronic expansion valve is characterized in that: The rotor sleeve is composed of a valve stem and a magnetic rotor, and an external thread section is formed at the middle end of the outer wall of the valve stem.

6. According to claim 5, a novel electronic expansion valve is characterized in that: The bearing seat comprises a seat body, in which a through hole is formed, the through hole matches the valve stem, an internal thread section matching the external thread section is formed in the middle of the inner wall of the through hole, and a shaft retaining ring groove is formed in the middle of the inner wall of the seat body.

7. According to claim 6, a novel electronic expansion valve is characterized in that: It also includes a C-shaped open retaining ring, which is embedded in the shaft retaining ring groove, and the inner diameter of the C-shaped open retaining ring is the same as the inner diameter of the shaft retaining ring groove.

8. According to claim 1, the novel electronic expansion valve is characterized in that: When the tail of the limit moving spring is located at the lower stop portion of the limit static spring and the closing point of the electronic expansion valve is determined, the handle of the limit moving spring contacts the lower portion of the limit rib of the magnetic rotor, and at the same time, a special tool is used to press the locating notch of the valve seat and the corresponding tooth above into the locating notch.

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