Remote control structural electromagnetic valve for defrosting refrigeration system and changing flow direction of refrigerant

Abstract

The invention relates to the technical field of electromagnetic valves, in particular to a remote control structural electromagnetic valve used for defrosting a refrigeration system and changing the flow direction of refrigerants, which comprises a brass valve body, the top of the brass valve body is communicated with a stainless steel sleeve, the stainless steel sleeve is sleeved with a shell, the top of the stainless steel sleeve is provided with a plug, and the plug is connected with the shell. The top of the shell and the inner side wall of the plug are in threaded connection with fastening bolts, an air inlet of the brass valve body is communicated with an air inlet red copper pipe, and an air outlet of the brass valve body is communicated with an air outlet red copper pipe. A traditional soft seal is replaced, the smoothness and roundness of the copper core fastener are guaranteed through high-precision machining, the copper core fastener is tightly attached to the sealing face of the special brass valve body, the internal leakage amount is stabilized at the extremely low level for a long time, and the situation that the refrigeration efficiency is reduced due to leakage is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of solenoid valve technology, specifically to a remote-controlled structural solenoid valve used for defrosting in refrigeration systems and changing the direction of refrigerant flow. Background Technology

[0002] In refrigeration equipment such as air conditioners, ice makers, and ice cream machines, solenoid valves are core components controlling defrosting and refrigerant flow switching in the refrigeration system. Their performance directly affects the equipment's refrigeration efficiency and lifespan. Currently, solenoid valves are generally designed according to the standard "Solenoid Valves for Refrigeration JB / T4119-2013," employing a soft-seal structure of PTFE material and a brass body. This design has two major drawbacks:

[0003] Excessive internal leakage: Soft sealing materials are prone to aging and deformation under long-term refrigerant corrosion and temperature changes, resulting in poor sealing surface adhesion, refrigerant leakage exceeding the standard, causing a decrease in refrigeration efficiency and an increase in energy consumption.

[0004] Short service life: The soft sealing structure wears out quickly during frequent on / off cycles (defrosting or reversing operations), and its lifespan is usually only about 20,000 cycles. This is far from meeting the needs of long-term high-frequency operation of commercial refrigeration equipment, leading to frequent equipment maintenance and even scrapping of the entire unit due to solenoid valve failure.

[0005] These problems severely restrict the stability and economy of refrigeration equipment. To address this, a remote-controlled structural solenoid valve for defrosting refrigeration systems and changing the direction of refrigerant flow is proposed. Summary of the Invention

[0006] In view of this, the present invention provides a remotely controlled structural solenoid valve for defrosting a refrigeration system and changing the direction of refrigerant flow, so as to solve or alleviate the technical problems existing in the prior art, and at least provide a beneficial option.

[0007] The technical solution of this invention is implemented as follows: A remote-controlled structural solenoid valve for defrosting and changing the refrigerant flow direction in a refrigeration system includes a brass valve body, a stainless steel sleeve connected to the top of the brass valve body, a housing fitted outside the stainless steel sleeve, a plug installed on the top of the stainless steel sleeve, a fastening bolt threadedly connected to the top of the housing and the inner wall of the plug, an inlet port of the brass valve body connected to an inlet copper pipe, an outlet port of the brass valve body connected to an outlet copper pipe, an electromagnetic coil installed outside the stainless steel sleeve, a magnetic core installed inside the stainless steel sleeve, a cylindrical spring installed on the inner wall of the magnetic core, a copper core fastener installed inside the brass valve body, a steel ball installed inside the brass valve body between the copper core fastener and the magnetic core, and a return spring fitted outside the copper core fastener.

[0008] More preferably, a filter screen is installed on the inner wall of the intake copper pipe.

[0009] The embodiments of the present invention have the following advantages due to the adoption of the above technical solutions:

[0010] I. This invention provides stable sealing performance and solves the problem of internal leakage: It adopts a hard sealing structure with 9-10.5mm copper core fasteners and brass valve body to replace the traditional soft seal. The copper core fasteners are processed with high precision to ensure smoothness and roundness, and fit tightly with the sealing surface of the specially made brass valve body. The internal leakage is kept at an extremely low level for a long time, effectively avoiding the decrease in refrigeration efficiency caused by leakage.

[0011] Second, the hard-seal structure of this invention experiences minimal wear during frequent on / off cycles. Combined with the stable elastic force output of the cylindrical spring and the return spring, the service life of the solenoid valve is increased from 20,000 cycles in the prior art to more than 300,000 cycles, meeting the long-term high-frequency operation requirements of commercial refrigeration equipment and reducing maintenance frequency and equipment downtime.

[0012] Third, the high-precision machining process of the copper core fastener of this invention enables a first-pass yield of 99.5%, far exceeding the 80% yield of traditional soft-seal components, thus reducing scrap rate and production costs. Simultaneously, the hard-seal structure eliminates the need for frequent seal replacements, further reducing maintenance costs throughout the equipment's lifecycle.

[0013] Fourth, in the overall structure of this invention, the filter screen can effectively block impurities, and the stainless steel sleeve and brass valve body are resistant to refrigerant corrosion and temperature shock. It is suitable for defrosting and flow control scenarios of various refrigeration systems such as air conditioners and ice makers, ensuring stable operation under complex working conditions.

[0014] 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

[0015] 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.

[0016] Figure 1 This is a structural diagram of the present invention;

[0017] Figure 2 This is a cross-sectional view of the present invention in the power-off state;

[0018] Figure 3 This is a cross-sectional view of the present invention in the energized state.

[0019] Reference numerals: 1. Brass valve body; 2. Stainless steel sleeve; 3. Housing; 4. Plug; 5. Fastening bolt; 6. Inlet copper pipe; 7. Outlet copper pipe; 8. Electromagnetic coil; 9. Magnetic core; 10. Cylindrical spring; 11. Steel ball; 12. Copper core fastener; 13. Return spring; 14. Filter screen. Detailed Implementation

[0020] 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.

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] like Figure 1-3 As shown, this embodiment of the invention provides a remote-controlled structural solenoid valve for defrosting and changing the refrigerant flow direction in a refrigeration system. It includes a brass valve body 1, a stainless steel sleeve 2 connected to the top of the brass valve body 1, a housing 3 fitted over the outside of the stainless steel sleeve 2, a plug 4 installed on the top of the stainless steel sleeve 2, and a fastening bolt 5 threadedly connected to the top of the housing 3 and the inner wall of the plug 4. An inlet copper pipe 6 is connected to the air inlet of the brass valve body 1, and an outlet copper pipe 7 is connected to the air outlet of the brass valve body 1. An electromagnetic coil 8 is installed outside the stainless steel sleeve 2, a magnetic core 9 is installed inside the stainless steel sleeve 2, a cylindrical spring 10 is installed on the inner wall of the magnetic core 9, a copper core fastener 12 is installed inside the brass valve body 1, a steel ball 11 is installed inside the brass valve body 1 between the copper core fastener 12 and the magnetic core 9, and a return spring 13 is fitted over the copper core fastener 12.

[0023] In one embodiment, a filter screen 14 is installed on the inner wall of the intake copper pipe 6.

[0024] In operation, the present invention works as follows: the inlet of the brass valve body 1 is connected to the refrigerant source pipeline of the refrigeration system through the inlet copper pipe 6, and the outlet is connected to the downstream pipeline of the system through the outlet copper pipe 7, ensuring a tight and leak-free connection. The filter screen 14 on the inner wall of the inlet copper pipe 6 filters impurities in the refrigerant, preventing impurities from entering the valve body and affecting the sealing performance. The electromagnetic coil 8 is connected to the control system power supply, and the housing 3 and the plug 4 are fixed by the fastening bolts 5 to complete the overall installation. When the electromagnetic coil 8 is not energized, the elastic force of the cylindrical spring 10 pushes the magnetic core 9 downward. The magnetic core 9, through the steel ball 11, squeezes the copper core fastener 12, making the copper core fastener 12 tightly fit with the sealing part of the brass valve body 1, blocking the connection between the inlet copper pipe 6 and the outlet copper pipe 7, and preventing the refrigerant from passing through. The solenoid valve is currently closed and does not participate in the refrigeration cycle. When the refrigeration system needs to defrost or change the refrigerant flow direction, the control system supplies power to the solenoid coil 8. The coil generates a magnetic field that attracts the magnetic core 9 to move upward, compressing the cylindrical spring 10. After the magnetic core 9 disengages from the steel ball 11, the elastic force of the return spring 13 pushes the copper core fastener 12 to reset, opening the sealing part. The high-pressure refrigerant in the intake copper pipe 6 flows through the internal channel of the brass valve body 1 to the outlet copper pipe 7, entering the refrigeration cycle to achieve defrosting or flow direction switching. After defrosting or reversing is completed, the solenoid coil 8 is de-energized, the magnetic field disappears, and the elastic force of the cylindrical spring 10 pushes the magnetic core 9 to reset. The steel ball 11 then presses the copper core fastener 12 to seal against the brass valve body 1, cutting off the refrigerant flow, and the solenoid valve returns to the closed state.

[0025] 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 remotely controlled structural solenoid valve for defrosting and changing the refrigerant flow direction in a refrigeration system, characterized in that: The system includes a brass valve body (1), the top of which is connected to a stainless steel sleeve (2). A housing (3) is fitted over the stainless steel sleeve (2). A plug (4) is installed on the top of the stainless steel sleeve (2). A fastening bolt (5) is threadedly connected to the top of the housing (3) and the inner wall of the plug (4). An air inlet of the brass valve body (1) is connected to an air inlet copper pipe (6), and an air outlet of the brass valve body (1) is connected to an air outlet copper pipe (7). An electromagnetic coil (8) is installed on the outside of the stainless steel sleeve (2), a magnetic core (9) is installed inside the stainless steel sleeve (2), a cylindrical spring (10) is installed on the inner side wall of the magnetic core (9), a copper core fastener (12) is installed inside the brass valve body (1), a steel ball (11) is installed inside the brass valve body (1) between the copper core fastener (12) and the magnetic core (9), and a return spring (13) is sleeved on the outside of the copper core fastener (12).

2. The remote-controlled structural solenoid valve for defrosting and changing the refrigerant flow direction in a refrigeration system according to claim 1, characterized in that: A filter screen (14) is installed on the inner wall of the intake copper pipe (6).

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