CN-114857328-B - Electric switching valve

CN114857328BCN 114857328 BCN114857328 BCN 114857328BCN-114857328-B

Abstract

The invention discloses an electric switching valve, which is characterized in that an adjusting valve port matched with a rotating sliding block is divided into a large through flow area and a small through flow area, the slit-shaped small through flow area is positioned at the radial outer side of the large through flow area and extends outwards from the through flow area to form the small through flow area, a sliding block working surface matched with the adjusting valve port can respectively realize small flow adjustment and large flow adjustment of the adjusting valve port along with the rotation of the sliding block, in the working process, the working surface corresponding to the small flow adjusting section can gradually change the shielding area of the small through flow area to carry out small flow adjustment while completely shielding the large through flow area, and meanwhile, the working surface corresponding to the large flow adjusting section can gradually change the shielding area of the large through flow area to carry out large flow adjustment. Based on the design of the small through flow area of the regulating valve port, the invention has smaller through flow variation in the small flow regulating and shielding process under the condition of the same displacement of the sliding block, thereby meeting the functional requirement of high-precision small flow regulation and realizing the regulation of larger flow.

Inventors

Request for anonymity
Request for anonymity

Assignees

浙江三花智能控制股份有限公司

Dates

Publication Date: 20260508
Application Date: 20210205

Claims (15)

1. The electronic switching valve is characterized by comprising a valve seat and a shell, wherein the valve seat is fixedly connected with the shell, the electronic switching valve further comprises a sliding block and a gear transmission mechanism, the output end of the gear transmission mechanism is connected with the sliding block to drive the sliding block to rotate relative to the valve seat to switch working positions, the opposite end of the sliding block to the valve seat is provided with a working surface matched with an adjusting valve port, the adjusting valve port is communicated with an outlet hole formed in the valve seat, the electronic switching valve is configured to be in a projection plane parallel to the working surface, the adjusting valve port comprises a large through flow area and a small through flow area, the small through flow area is located on the radial outer side of the large through flow area, the small through flow area is in a slit shape formed by extending outwards from the large through flow area, the peripheral outline of the working surface comprises a small flow adjusting section and a large flow adjusting section, the small flow adjusting section and the large flow adjusting section of the working surface are sequentially matched with the adjusting valve port in the process of switching the working position of the sliding block, the working surface is formed by a large through flow area corresponding to the small flow adjusting section, and the small through flow area can gradually change the large through flow area gradually, and the large flow area can gradually change the large flow area.
2. The electronic switching valve according to claim 1, wherein the small flow rate adjusting section of the outer peripheral contour of at least the working surface is configured as an Archimedes spiral arc section formed with the rotation center of the slider as a fixed point, and the slit forming the small flow passage region is formed in a straight line shape extending radially.
3. The electronic switching valve of claim 2, wherein the high flow adjustment section is a straight line section and is configured such that the straight line section at the transition between the low flow adjustment and the high flow adjustment is parallel to the straight line slit.
4. The electronic switching valve of claim 3, wherein the large flow area is a circular hole concentric with the outlet aperture.
5. The electronic switching valve of claim 4, wherein the body of the slider has an axially extending boss, an end face of the boss forming the working surface.
6. The electronic switching valve according to any one of claims 1 to 5, wherein a throttling plate attached and fixed to the valve seat is arranged on the valve seat, the regulating valve port is arranged on the throttling plate, and an outlet transition flow passage which is arranged corresponding to the regulating valve port is arranged on an adapting end surface of the valve seat and the throttling plate.
7. The electronic switching valve of claim 6, wherein the outlet transition flow passage comprises a large flow passage that covers a large flow area of the regulator valve port and a small flow passage that covers a small flow area of the regulator valve port in a projection plane parallel to the working surface.
8. The electronic switching valve according to claim 6, further comprising a retainer ring fixedly connected to the valve seat, the retainer ring having a radially inwardly extending limiting portion, the limiting portion axially pressing against the throttling plate so that the throttling plate is in conforming engagement with the valve seat.
9. The electronic switching valve according to claim 8, wherein the limiting portions are provided in a plurality of circumferentially and uniformly distributed manner, a positioning groove is formed in an inner edge of at least one of the limiting portions, and a positioning block adapted to the positioning groove is arranged on an outer edge of the throttling plate so as to define a circumferential position of the throttling plate.
10. The electronic switching valve according to claim 9, wherein the outer peripheral contour of the working surface further includes a fully closed section and a fully open section, and is configured such that the direction of rotation is switched from the fully closed working position to the fully open working position along the slider, the fully closed section is located on the upstream side of the small flow rate adjustment section, the fully closed section is located on the downstream side of the large flow rate adjustment section, and the working surface corresponding to the fully closed section can constitute the complete shielding of the adjustment valve port, and the working surface corresponding to the fully open section does not constitute the shielding of the adjustment valve port.
11. The electronic switching valve according to claim 10, wherein the outer peripheral surface of the slider has an outer protrusion formed to protrude radially, the retainer ring has a stopper formed to extend axially toward the slider, and both side surfaces of the outer protrusion are respectively circumferentially fittable against both side surfaces of the stopper to define a fully open operation position and a fully closed operation position of the slider, respectively.
12. The electronic switching valve according to claim 11, wherein an adaptation end surface of the valve seat and the throttling plate is provided with an inner concave ring groove, an inlet Kong Kaishe formed on the valve seat is formed in the bottom of the inner concave ring groove, at least part of the retainer ring is embedded in the inner concave ring groove, and an outer ring supporting part formed by extending towards the axial direction of the valve seat is arranged on the outer edge of the body of the retainer ring so as to be abutted with the bottom of the inner concave ring groove.
13. The electronic switching valve according to claim 12, wherein the body of the retainer ring is provided with a plurality of circumferentially uniformly distributed inlet transition flow passages.
14. The electronic switching valve according to claim 12, wherein the groove bottom of the inner concave ring groove and the retainer ring on the opposite side are provided with a positioning hole on one and a positioning column adapted to the positioning hole on the other.
15. The electronic switching valve according to any one of claims 1 to 5, wherein the gear transmission mechanism is a planetary gear transmission mechanism, a sun gear thereof is an input end, an inner gear thereof is the output end, and the slider is integrally formed with the inner gear.

Description

Electric switching valve Technical Field The invention relates to the technical field of fluid control, in particular to an electric switching valve. Background In order to accurately regulate the temperature of the refrigerator, micro flow regulation of a refrigerating medium is needed, and how to improve an electric switching valve to perform optimal design so as to realize high-precision small flow regulation is a technical problem to be solved urgently for a person skilled in the art. Disclosure of Invention In order to solve the technical problems, the invention provides the novel-structure electric switching valve which can realize accurate adjustment of small flow. The electronic switching valve comprises a valve seat and a shell, wherein the valve seat is fixedly connected with the shell, the electronic switching valve further comprises a sliding block and a gear transmission mechanism, the output end of the gear transmission mechanism is connected with the sliding block to drive the sliding block to rotate relative to the valve seat to switch working positions, the opposite end of the sliding block to the valve seat is provided with a working face matched with an adjusting valve port, the adjusting valve port is communicated with an outlet hole formed in the valve seat, the electronic switching valve is configured to be in a projection plane parallel to the working face, the adjusting valve port comprises a large through flow area and a small through flow area, the small through flow area is located on the radial outer side of the large through flow area, the small through flow area is in a slit shape formed by extending outwards from the large through flow area, the peripheral outline of the working face comprises a small flow adjusting section and a large flow adjusting section, the small flow adjusting section and the large flow adjusting section of the working face are matched with the adjusting valve port in the working position switching process of the sliding block, the working face is formed into a large through flow area corresponding to the working face, the large through flow area can be gradually changed gradually, and the large through flow area can be gradually changed. Compared with the background art, the adjustable valve port matched with the rotary slide block is divided into a large through flow area and a small through flow area, the slit-shaped small through flow area is positioned on the radial outer side of the large through flow area and extends outwards from the through flow area to form the small through flow area, and correspondingly, the working surface of the slide block matched with the adjustable valve port can respectively realize small flow adjustment and large flow adjustment of the adjustable valve port along with the rotation of the slide block. In the working process, the working surface corresponding to the small flow regulating section can gradually change the shielding area of the small flow regulating section while shielding the large flow region so as to regulate the small flow, and meanwhile, the working surface corresponding to the large flow regulating section can gradually change the shielding area of the large flow region so as to regulate the large flow. Compared with the design of the small through flow area of the regulating valve port, under the condition that the displacement of the sliding block is the same, the through flow variation in the small flow regulating and shielding process is smaller, so that the functional requirement of high-precision small flow regulation can be met, and simultaneously, the regulation of larger flow can be realized. Has good regulating function. Drawings FIG. 1 is a schematic diagram of an overall structure of an electronic switching valve according to an embodiment; FIG. 2 is an exploded view of the assembly of the electronic switching valve of FIG. 1; FIG. 3 is a top view of the valve seat shown in FIG. 1; FIG. 4 is a cross-sectional view A-A of FIG. 3; Fig. 5 shows the relative positional relationship of the large through-flow region and the small through-flow region arranged on the throttle plate; FIG. 6 shows a B-view of the slider shown in FIG. 2; Fig. 7a, 7b, 7c, 7d, 7e and 7f show the characteristic points of the adapting relationship of the slider and the regulating valve port in different working states, respectively; FIG. 8 is a top view of the fitting relationship of the orifice plate to the valve seat; FIG. 9 is a schematic diagram of the overall structure of the retainer ring; FIG. 10 is an exploded view of the assembly relationship of the valve seat, throttle plate, retainer ring and slider. In the figure: The housing 1, the rotor 2, the coil assembly 3, the valve seat 4, the inlet hole 41, the outlet hole 42, the large flow passage 43, the small flow passage 44, the inner concave groove 45, the positioning hole 46, the flange 47, the shaft 5, the sleeve 6, the slider 7, the working face 71, the full