CN212718030U

CN212718030U - Electromagnetic expansion valve

Info

Publication number: CN212718030U
Application number: CN202021596235.9U
Authority: CN
Inventors: 范志伟; 叶南伟
Original assignee: Longquan Huifeng Import And Export Co ltd
Current assignee: Longquan Huifeng Import And Export Co ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-03-16
Anticipated expiration: 2030-08-04

Abstract

The utility model provides an electromagnetic expansion valve becomes a part of case subassembly after the valve gap assembly, and the solenoid valve can carry out sealing performance and detect and synthesize the electric test, and problematic in time handles, and the guarantee is qualified at last to assemble the solenoid valve on the expansion valve, reduces the frequency that the solenoid valve broke down in the electromagnetic expansion valve final test.

Description

Electromagnetic expansion valve

Technical Field

The utility model relates to a fluid control field, concretely relates to automobile air conditioner technical field's an electromagnetic expansion valve.

Background

The utility model application of the utility model CN 209876100U provides an electromagnetic expansion valve, the valve body of the electromagnetic expansion valve also comprises a cavity, the cavity is in a ladder shape, the cavity is communicated with a first interface and a second interface, and at least part of the cavity is communicated with a communicating channel, and the communicating channel runs through the valve body; an adjusting screw rod is further arranged in the cavity and fixedly connected with the inner wall of the cavity in a threaded manner. A valve cover is further arranged between the adjusting screw rod and the electromagnetic valve core assembly, the valve cover is of a central hole columnar structure and comprises a large-diameter part and a small-diameter part, a step part is further arranged on the shoulder part of the large-diameter part, a saddle spring is arranged on the step part, the end part of the large-diameter part abuts against the inner wall part of the cavity and is arranged opposite to the adjusting screw rod, a sealing element is further arranged between the large-diameter part and the small-diameter part, and the valve cover is used for preventing refrigerant leakage by; the end part of the small diameter part is provided with a first valve port which is abutted against the bottom of the piston part. However, the valve cover and the valve core assembly are separately arranged, the sealing performance detection and the comprehensive electrical test can be performed only after the solenoid valve expansion valve is completely assembled, and the frequency of problems is high.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an electromagnetic expansion valve reduces the frequency that the solenoid valve broke down in the final test.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an electromagnetic expansion valve comprises a valve body, a power head, a push rod and an electromagnetic valve fixed on the valve body, wherein the valve body further comprises a cavity with steps, the cavity is provided with a throttle valve port, and the throttle valve port is communicated with a first interface and a second interface; the electromagnetic valve comprises a coil assembly and a valve core assembly, wherein the valve core assembly comprises a valve cover, a valve seat, a sleeve with one end fixedly connected with the valve seat, an end socket positioned in the sleeve or partially positioned in the sleeve and fixed at the other end of the sleeve, and a core iron capable of sliding in the sleeve, a core iron spring is arranged between the core iron and the end socket, one end of the valve cover is used for dividing a cavity and sealing, the other end of the valve cover is provided with a valve port, the valve port is communicated with the cavity, and the core iron controls the opening and closing of the; the cavity is also internally provided with an adjusting screw, a valve core and a spring, the adjusting screw is fixedly connected with the inner wall of the cavity through threads, the valve core is abutted against the push rod, and the power head pushes the push rod so as to adjust the opening degree of the valve core; the valve core assembly extends into the cavity and is fixedly connected with the valve body, and the valve seat is fixedly connected with the valve cover.

Further, the valve seat and the valve cover are connected through welding.

Further, one end of the valve cover is abutted against the bottom surface of the step of the cavity and is sealed.

Furthermore, one end of the valve cover is sharp-edged and is abutted against the bottom surface of the step of the cavity and sealed.

Further, the valve seat is provided with an external thread, the valve body is provided with an internal thread, and the valve core assembly is fixedly connected with the internal thread of the valve body through the external thread of the valve seat.

Furthermore, the valve core assembly also comprises a piston and a valve opening spring, and the core iron controls the opening and closing of the valve port through the piston and the valve opening spring.

Furthermore, the valve cover is a hollow columnar structure and comprises a large-diameter part and a small-diameter part which are arranged opposite to the adjusting screw rod, the valve port is arranged at the end part of the small-diameter part, and the valve cover and the valve seat are provided with guide matching sections.

Further, the valve cover and the adjusting screw rod are provided with guiding matching sections.

Furthermore, the coil assembly comprises a magnetic conduction frame, a coil framework, a coil, a wiring terminal and a plastic package layer coated outside the magnetic conduction frame, wherein sealing rings are arranged at two ends of the coil assembly and are fixedly connected with the valve core component through screws.

The utility model discloses an electromagnetic expansion valve becomes the partly of case subassembly after the valve gap assembly, and the solenoid valve can carry out sealing performance and detect and synthesize the electric test, and the problem is in time restoreed, and the guarantee is qualified at last to assemble the solenoid valve on the expansion valve, can reduce the frequency that the solenoid valve broke down in the final test.

Drawings

Fig. 1 is a schematic diagram of an electromagnetic expansion valve.

Fig. 2 is a partially enlarged schematic view.

Detailed Description

In order to make those skilled in the art understand the technical solution of the present invention better, the following detailed description is made with reference to the accompanying drawings and specific examples, and the terms of upper and lower directions in the description are set forth according to the corresponding directions of the drawings. It is not overrepresented here, as is clearly described in the cited background document.

Referring to fig. 1 and 2, in the present embodiment, the electromagnetic expansion valve includes a valve body 1, an electromagnetic valve 2 fixed on the valve body 1, a power head 3, and a push rod 4, and a first interface 11 for a high-temperature and high-pressure liquid refrigerant introduced from a side of a liquid reservoir and a second interface 12 for a low-temperature and low-pressure refrigerant throttled and depressurized by the expansion valve to be led out to an evaporator are disposed on a side surface of the valve body 1; further, a third port 14 for introducing the refrigerant after being evaporated in the evaporator and a fourth port 15 for leading out the refrigerant to the compressor side are provided on the side surface of the valve body 1.

The valve body 1 of the electromagnetic expansion valve further comprises a cavity 16 with steps, the power head 3 is arranged at the upper end of the valve body 1, the cavity 16 is arranged at the lower end, the cavity 16 is provided with a throttle valve port 13, the first interface 11 is communicated with a first channel 17, the second interface 12 is communicated with a second channel 18, the first channel 17 is communicated with the cavity 16, and the second channel 18 is communicated with the throttle valve port 13. The solenoid valve 2 includes a spool assembly 20 and a coil assembly 30, and at least a portion of the spool assembly 20 is located in the cavity 16. The valve core assembly 20 comprises a piston 21, a valve opening spring 22, a valve seat 23, a valve cover 28, a sleeve 24 with one end fixedly connected with the valve seat 23, a seal head 25 positioned in the sleeve 24 or partially positioned in the sleeve 24 and fixed at the other end of the sleeve 24, and a core iron 26 capable of sliding in the sleeve 24, wherein a core iron spring 27 is further arranged between the core iron 26 and the seal head 25, one end of the core iron spring 27 is abutted against a spring accommodating cavity at the upper end of the core iron 26, and the other end is abutted against the bottom surface of the seal head 25. The valve seat 23 is a hollow structure, the lower cavity accommodates the part of the sleeve 24 extending into the valve seat 23, the upper cavity accommodates the piston 21 and the valve-opening spring 22, and the bottom of the valve-opening spring 22 is the valve cover 28. The valve cover is a hollow columnar structure, which comprises a large-diameter part and a small-diameter part, the large-diameter part and the small-diameter part are arranged opposite to the adjusting screw 7, the valve port 281 is arranged at the end part of the small-diameter part, the valve cover and the valve seat are provided with guide matching sections 282, and the valve cover and the adjusting screw are also provided with guide matching sections 283. The opening and closing of the valve port 281 is controlled by controlling the piston 21 through the core iron 26; at cavity 16 and near throttle valve port 13 department, install case 5 (case 5 is the steel ball in this embodiment), spring 6 and adjusting screw 7, adjusting screw 7 and cavity inner wall thread fixed connection, case 5 and push rod 4 butt, thereby unit head 3 promotes push rod 4 and adjusts the aperture of case 5, forms holistic case subassembly 20 through laser welding fixed connection between disk seat 23 and the valve gap 28, through threaded connection between case subassembly 20 and the valve body 1 to set up sealing washer 8 and prevent the leakage. The valve core assembly 20 forms a whole body, so that the production transfer and management are convenient; in addition, the valve cover 28 and the valve seat 23 adopt a split welding structure, the valve cover 28 can be made of stainless steel materials which are easy to process, the end part is sharp-edged, the bottom surface of the abutting cavity step can be wedged and sealed, and the valve seat 23 can be made of stainless steel materials which are easy to weld because the valve seat 23 needs to be welded with the sleeve 24, so that the comprehensive cost is reduced. In this embodiment, the valve seat 23 is provided with an external thread, the valve cover 28 is in guiding fit with the valve seat 23, and the valve core assembly 20 is in threaded connection with the valve body 1, in fact, the valve seat 23 is in threaded connection with the valve body 1. In this embodiment, the core 26 controls the opening and closing of the valve port 281 by the piston 21 and the valve-opening spring 22, and is a pilot type solenoid valve mode, and the core 26 may directly control the opening and closing of the valve port 281, that is, a direct type solenoid valve mode.

The coil assembly 30 includes a magnetic conduction frame 31, a coil frame 32, a coil 33, a connection terminal 34 and a plastic package layer 35, the above components are plastic packaged by the plastic package layer 35, the magnetic conduction frame 31 is also in the plastic package layer 35, and the connection terminal 34 is used for connecting an external lead to control the action of the electromagnetic valve 2. The end socket 25 is provided with screw holes, and sealing rings are arranged at two ends of the coil assembly and are fixedly connected with the valve core assembly through screws and gaskets.

In this embodiment, the electromagnetic expansion valve is opened when the power is turned on, and closed when the power is turned off, and in the power-on state, the electromagnetic expansion valve pushes the push rod 4 through the power head 3 to adjust the opening degree of the valve core 5, thereby controlling the flow rate of the electromagnetic expansion valve.

It should be noted that: the above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and the expressions such as upper, lower, inner, outer, etc. appearing herein are only for the purpose of more clearly illustrating the technical solutions of the present invention, but not for limiting the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, it will be understood by those skilled in the art that the present invention may be modified and replaced by other embodiments without departing from the spirit and scope of the present invention.

Claims

1. The electromagnetic expansion valve comprises a valve body, a power head, a push rod and an electromagnetic valve fixed on the valve body, wherein the valve body also comprises a cavity with steps, the cavity is provided with a throttle valve port, and the throttle valve port is communicated with a first interface and a second interface; the electromagnetic valve comprises a coil assembly and a valve core assembly, wherein the valve core assembly comprises a valve cover, a valve seat, a sleeve with one end fixedly connected with the valve seat, an end socket positioned in the sleeve or partially positioned in the sleeve and fixed at the other end of the sleeve, and a core iron capable of sliding in the sleeve, a core iron spring is arranged between the core iron and the end socket, one end of the valve cover is used for dividing a cavity and sealing, the other end of the valve cover is provided with a valve port, the valve port is communicated with the cavity, and the core iron controls the opening and closing of the; still be provided with adjusting screw, case and spring in the cavity, adjusting screw and cavity inner wall thread fixed connection, case and push rod butt, thereby the unit head promotes the aperture of push rod adjustment case, its characterized in that: the valve core assembly extends into the cavity and is fixedly connected with the valve body, and the valve seat is fixedly connected with the valve cover.

2. The electromagnetic expansion valve according to claim 1, wherein: the valve seat and the valve cover are connected through welding.

3. The electromagnetic expansion valve according to claim 1, wherein: one end of the valve cover is abutted against the bottom surface of the step of the cavity and is sealed.

4. An electromagnetic expansion valve according to claim 3, wherein: one end of the valve cover is sharp-edged and is abutted against the bottom surface of the step of the cavity and sealed.

5. The electromagnetic expansion valve according to claim 1, wherein: the valve seat is provided with an external thread, the valve body is provided with an internal thread, and the valve core assembly is fixedly connected with the internal thread of the valve body through the external thread of the valve seat.

6. The electromagnetic expansion valve according to claim 1, wherein: the valve core assembly further comprises a piston and a valve opening spring, and the valve opening is controlled by the core iron through the piston and the valve opening spring.

7. The electromagnetic expansion valve according to claim 1, wherein: the valve cover is a hollow columnar structure and comprises a large-diameter part and a small-diameter part which are arranged opposite to the adjusting screw rod, the valve port is arranged at the end part of the small-diameter part, and the valve cover and the valve seat are provided with guide matching sections.

8. The electromagnetic expansion valve according to claim 7, wherein: the valve cover and the adjusting screw rod are provided with guide matching sections.

9. The electromagnetic expansion valve according to claim 1, wherein: the coil assembly comprises a magnetic conduction frame, a coil framework, a coil, a wiring terminal and a plastic package layer coated outside the magnetic conduction frame, wherein sealing rings are arranged at two ends of the coil assembly and are fixedly connected with the valve core assembly through screws.