A medium flow electromagnetic valve suitable for commercial refrigeration industry

Abstract

The application relates to the technical field of refrigeration control valves, in particular to a medium-flow electromagnetic valve suitable for commercial refrigeration industry, which comprises a stainless steel sleeve, a magnetic core is slidably connected in the interior of the stainless steel sleeve, a plug is connected above the magnetic core in the interior of the stainless steel sleeve, a cylindrical spring is sleeved in the interior of the magnetic core, a coil outer cover is installed outside the stainless steel sleeve, and an electromagnetic coil is wound outside the stainless steel sleeve; the application adopts brass core sealing pieces and brass bodies or stainless steel bodies to realize precise hard sealing cooperation, the finishing degree and the roundness precision are high, the sealing is stable and reliable, nearly zero leakage is realized, the problems of large leakage of traditional soft sealing and valve piece sealing are solved, the metal hard sealing is wear-resistant, impact-resistant and not prone to aging, the service life is increased from 50,000 times to more than 600,000 times under the frequent on-off and reversing working conditions, and the service life is increased by more than 10 times.

Description

Technical Field

[0001] This invention relates to the field of refrigeration control valve technology, specifically a medium-flow solenoid valve suitable for the commercial refrigeration industry. Background Technology

[0002] In commercial refrigeration systems, solenoid valves are core components for refrigerant on / off control, and their sealing performance and service life directly affect the overall refrigeration effect. Existing solenoid valves for refrigeration generally suffer from the following defects:

[0003] Valve-type sealing structures have large leakage and poor sealing reliability, making it impossible to maintain stable pressure for a long time, resulting in large fluctuations in refrigeration efficiency.

[0004] PTFE soft seals are prone to wear and aging, have serious internal leakage, short lifespan, and require frequent maintenance and replacement.

[0005] The structure is complex, the assembly precision is low, the finished product qualification rate is low, and the production cost is high.

[0006] Frequent switching and reversing can easily lead to failure, and the lifespan is usually only about 50,000 cycles, which cannot meet the long-term high-frequency use requirements of commercial equipment.

[0007] It has poor compatibility with commercial complete machines and cannot meet the development needs of high flow, high reliability and long life.

[0008] Based on the industry standard JB / T4119-2013 "Solenoid Valves for Refrigeration", existing products still cannot solve the core problems of unstable sealing and short lifespan, resulting in high failure rate of the whole machine, frequent maintenance, and even premature scrapping. Therefore, a medium flow solenoid valve suitable for the commercial refrigeration industry is proposed. Summary of the Invention

[0009] In view of this, the present invention provides a medium-flow solenoid valve suitable for the commercial refrigeration industry to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial alternative.

[0010] The technical solution of this invention is implemented as follows: A medium-flow solenoid valve suitable for the commercial refrigeration industry includes a stainless steel sleeve, a magnetic core slidably connected inside the stainless steel sleeve, a plug connected inside the stainless steel sleeve above the magnetic core, a cylindrical spring sleeved inside the magnetic core, a coil cover installed outside the stainless steel sleeve, an electromagnetic coil wound around the outside of the stainless steel sleeve, a brass core seal fitted on the inner side wall of the stainless steel sleeve below the magnetic core, a steel ball between the brass core seal and the magnetic core, a brass body or a stainless steel body welded to the outer side wall of the stainless steel sleeve, an inlet copper pipe welded to the outer side wall of the brass body or stainless steel body, and an outlet copper pipe welded to the bottom of the brass body or stainless steel body.

[0011] More preferably, the top of the coil cover and the internal threaded connection of the plug are fastening screws.

[0012] More preferably, a filter screen is installed inside the intake copper pipe.

[0013] More preferably, a stainless steel stop or a brass stop is fixedly connected to the inner wall of the stainless steel sleeve.

[0014] Further preferred components include: stainless steel sleeve Ф9-Ф11, magnetic core Ф8-Ф10, plug Ф8-Ф11, brass core seal Ф10-Ф13, inlet copper pipe Ф8-Ф12.7, steel ball Ф4-Ф6, outlet copper pipe Ф8-Ф12.7, stainless steel or brass stop block Ф11, and brass or stainless steel body Ф18-Ф25.

[0015] The embodiments of the present invention have the following advantages due to the adoption of the above technical solutions:

[0016] I. This invention uses a brass core seal and a brass or stainless steel body for precision hard sealing, which has high surface finish and roundness accuracy, stable and reliable sealing, and near-zero leakage. It completely solves the problem of large leakage in traditional soft seals and valve plate seals. The metal hard seal is wear-resistant, impact-resistant, and not easy to age. Under frequent switching conditions, the service life is increased from 50,000 times to more than 600,000 times, which is more than 10 times.

[0017] Second, the present invention has a simplified structure and high fitting precision, with a one-time assembly yield of over 99.5%, far exceeding the 80% of traditional processes, significantly reducing production costs. The sealing performance remains stable and does not degrade over a long period, ensuring the continuous and efficient operation of the refrigeration system and avoiding potential problems such as poor refrigeration, frequent maintenance, and scrapping of the entire machine due to solenoid valve failure.

[0018] Third, the air inlet of this invention is equipped with a filter screen to effectively filter impurities and protect the sealing surface; the stainless steel or brass stop block provides precise positioning, stable and reliable operation, adapts to complex working conditions of refrigeration systems, and the flow rate matches the mainstream needs of commercial refrigeration. It can be widely used in ice makers, ice cream machines, cold storage, freezers, commercial air conditioners and other equipment, with a wide range of applications.

[0019] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural diagram of the present invention in the power-off state;

[0022] Figure 2 This is a structural diagram of the present invention in its energized state;

[0023] Figure 3 This is a structural diagram of the present invention.

[0024] Reference numerals: 1. Stainless steel sleeve; 2. Magnetic core; 3. Plug; 4. Cylindrical spring; 5. Coil outer cover; 6. Fastening screw; 7. Electromagnetic coil; 8. Brass core seal; 9. Inlet copper pipe; 10. Filter screen; 11. Steel ball; 12. Outlet copper pipe; 13. Stainless steel or brass stop; 14. Brass body or stainless steel body. Detailed Implementation

[0025] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0026] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0027] like Figure 1-3 As shown, this embodiment of the invention provides a medium-flow solenoid valve suitable for the commercial refrigeration industry, including a stainless steel sleeve 1, a magnetic core 2 slidably connected inside the stainless steel sleeve 1, a plug 3 connected inside the stainless steel sleeve 1 above the magnetic core 2, a cylindrical spring 4 sleeved inside the magnetic core 2, a coil cover 5 installed outside the stainless steel sleeve 1, an electromagnetic coil 7 wound around the outside of the stainless steel sleeve 1, a brass core seal 8 assembled on the inner side wall of the stainless steel sleeve 1 below the magnetic core 2, a steel ball 11 between the brass core seal 8 and the magnetic core 2, a brass body or stainless steel body 14 welded to the outer side wall of the stainless steel sleeve 1, an inlet copper pipe 9 welded to the outer side wall of the brass body or stainless steel body 14, and an outlet copper pipe 12 welded to the bottom of the brass body or stainless steel body 14.

[0028] In one embodiment, the top of the coil cover 5 and the internal threaded connection of the plug 3 are fastening screws 6.

[0029] In one embodiment, a filter screen 10 is installed inside the intake copper pipe 9.

[0030] In one embodiment, a stainless steel stop or a brass stop 13 is fixedly connected to the inner wall of the stainless steel sleeve 1.

[0031] In one embodiment, the stainless steel sleeve is 1Ф9-Ф11, the magnetic core is 2Ф8-Ф10, the plug is 3Ф8-Ф11, the brass core seal is 8Ф10-Ф13, the inlet copper pipe is 9Ф8-Ф12.7, the steel ball is 11Ф4-Ф6, the outlet copper pipe is 12Ф8-Ф12.7, the stainless steel or brass stop is 13Ф11, and the brass or stainless steel body is 14Ф18-Ф25.

[0032] When the present invention is in operation: When the electromagnetic coil 7 is energized, it generates a magnetic field, which attracts the magnetic core 2 to move upward and compress the cylindrical spring 4. The magnetic core 2 drives the steel ball 11 to move upward, causing the brass core seal 8 to open. The refrigerant enters the brass body or stainless steel body 14 from the inlet copper pipe 9 through the filter screen 10, passes through the brass core seal 8, and flows out from the outlet copper pipe 12. The solenoid valve is in the conducting state. When the electromagnetic coil 7 is de-energized, the magnetic field disappears, the cylindrical spring 4 pushes the magnetic core 2 downward, and the magnetic core 2 presses the brass core seal 8 through the steel ball 11, so that the brass core seal 8 and the brass body or stainless steel body 14 form a high-precision hard seal, blocking the refrigerant passage. The solenoid valve returns to the closed state. The metal hard seal achieves a stable and reliable zero internal leakage closing effect.

[0033] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in the present invention, and these should all be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A medium-flow solenoid valve suitable for the commercial refrigeration industry, characterized in that: The system includes a stainless steel sleeve (1), a magnetic core (2) is slidably connected inside the stainless steel sleeve (1), a plug (3) is connected inside the stainless steel sleeve (1) above the magnetic core (2), a cylindrical spring (4) is sleeved inside the magnetic core (2), a coil cover (5) is installed outside the stainless steel sleeve (1), an electromagnetic coil (7) is wound around the outside of the stainless steel sleeve (1), a brass core seal (8) is installed on the inner side wall of the stainless steel sleeve (1) below the magnetic core (2), a steel ball (11) is provided between the brass core seal (8) and the magnetic core (2), a brass body or a stainless steel body (14) is welded to the outer side wall of the stainless steel sleeve (1), an air inlet copper pipe (9) is welded to the outer side wall of the brass body or the stainless steel body (14), and an air outlet copper pipe (12) is welded to the bottom of the brass body or the stainless steel body (14).

2. A medium-flow solenoid valve suitable for the commercial refrigeration industry according to claim 1, characterized in that: The top of the coil cover (5) and the inside of the plug (3) are connected by fastening screws (6).

3. A medium-flow solenoid valve suitable for the commercial refrigeration industry according to claim 1, characterized in that: The air intake copper pipe (9) is equipped with a filter screen (10).

4. A medium-flow solenoid valve suitable for the commercial refrigeration industry according to claim 1, characterized in that: The inner wall of the stainless steel sleeve (1) is fixedly connected with a stainless steel stop or a brass stop (13).

5. A medium-flow solenoid valve suitable for the commercial refrigeration industry according to claim 1, characterized in that: Stainless steel sleeve (1) Ф9-Ф11, magnetic core (2) Ф8-Ф10, plug (3) Ф8-Ф11, brass core seal (8) Ф10-Ф13, inlet copper pipe (9) Ф8-Ф12.7, steel ball (11) Ф4-Ф6, outlet copper pipe (12) Ф8-Ф12.7, stainless steel block or brass block (13) Ф11, brass body or stainless steel body (14) Ф18-Ф25.

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