A shut-off valve for air conditioning

Abstract

This utility model discloses a shut-off valve for air conditioning, relating to the field of heat exchange technology. The valve body is disassembled into multiple components, including a valve core seat, a connecting pipe seat, and a mounting seat. Each part is manufactured separately and then assembled. Finally, they are connected into a whole by welding. Each component can be made of materials such as stainless steel and aluminum alloy, which is lightweight, low-cost, highly corrosion-resistant, and has high pressure and burst resistance. In addition, each component can also be made of raw materials such as round tubes and square tubes, and can be manufactured by cold heading or metal processing, which reduces the amount of material used and lowers the material cost. Furthermore, the size of the components is reduced and the structural features of each component are reduced, so they can be processed by simpler automated equipment, further reducing the processing cost.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange technology, and in particular to a shut-off valve for air conditioning. Background Technology

[0002] An air conditioning shut-off valve is a valve used to control the flow of fluids in a refrigeration system. Its main function is to cut off or regulate flow, ensuring the normal operation of the system. A shut-off valve is a pipeline valve that controls the passage and cut-off of the flowing medium by manually controlling the opening and closing of the valve core. It is typically used at the end of pipelines, connecting various testing instruments and system charging and discharging, effectively cutting off fluid flow. In air conditioning systems, the main function of the shut-off valve is to control the flow of refrigerant, ensuring the normal operation and maintenance of the system. Shut-off valves are an indispensable component in the field of heat exchange or pipeline control technology, especially in the field of heat exchange technology, particularly in air conditioning equipment. In air conditioning equipment, split-type air conditioning units consist of indoor and outdoor units, connected by pipelines. Shut-off valves connect these pipelines. During air conditioning installation, shut-off valves are used to evacuate the pipelines and air conditioning equipment and charge the heat exchange medium. During air conditioning maintenance, shut-off valves are closed to check the sealing of the indoor or outdoor unit's pipelines.

[0003] Existing gate valves consist of a valve body and a valve core, and are generally made of brass. The valve body is produced by forging and then undergoes metal processing. The forging and one-piece forming process can reduce the amount of copper used and lower the production cost. However, due to the limited availability of copper resources, the cost of copper gate valves remains relatively high.

[0004] Therefore, how to reduce the cost of using shut-off valves for air conditioning without compromising their reliability is one of the key areas of work for those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a shut-off valve for air conditioners, thereby reducing the cost of using such valves.

[0006] To solve the above-mentioned technical problems, this utility model provides a shut-off valve for air conditioning, including a valve body, a valve core, and a sealing cap. The valve body includes a valve core seat, a connecting pipe seat, and a mounting seat. The valve core seat, the connecting pipe seat, and the mounting seat are welded together. The valve core is installed in the valve core seat. The connecting pipe seat is used to connect to the connecting pipes of the indoor unit and the outdoor unit of the air conditioning system. The connecting pipe seat is provided with a first channel for the valve core to pass through and a second channel for the heat exchange medium of the connecting pipe to pass through. The sealing cap is installed at the inlet and outlet of the second channel and seals the outlet or inlet of the second channel. The mounting seat is connected to the outer wall of the valve core seat for installing the valve core seat in the air conditioning equipment.

[0007] It also includes an external thread provided on the valve core seat for installing the sealing cap, an internal thread provided on the valve core seat for installing the valve core, and a mounting hole provided on the valve core seat for connecting the connecting pipe seat.

[0008] The valve body is either a stainless steel valve body or an aluminum alloy valve body.

[0009] The valve core is a stainless steel valve core, a copper valve core, or an aluminum alloy valve core.

[0010] It also includes a welding protrusion on the mounting surface of the connecting pipe of the valve core seat, through which the connecting pipe is welded to the valve core seat.

[0011] The valve core seat can be a square valve core seat, a round tube valve core seat, or a polygonal valve core seat.

[0012] It also includes a relief groove for machining external threads, a limiting step for inserting the valve core seat, and a welding ring groove for placing solder, wherein the solder is a welding ring or a welding sheet.

[0013] It also includes a filling nozzle channel, a filling nozzle mounting thread, and an air nozzle mounted on the filling nozzle mounting thread, wherein the filling nozzle mounting thread is disposed on the inner wall or the outer wall of the filling nozzle channel.

[0014] The outer surface of the connecting pipe seat is shaped as a regular polygon or a circle, and the connecting pipe seat is a stainless steel connecting pipe seat or an aluminum alloy connecting pipe seat.

[0015] The cap is made of stainless steel, aluminum alloy, or copper.

[0016] The air conditioning shut-off valve provided in this embodiment of the invention has the following advantages compared with the prior art:

[0017] The air conditioning shut-off valve provided in this embodiment of the utility model is made by disassembling the valve body into multiple parts, including a valve core seat, a connecting pipe seat, and a mounting seat. Each part is manufactured separately and then assembled. Finally, they are connected into a whole by welding. Each part can be made of materials such as stainless steel and aluminum alloy, which is lightweight, low cost, highly corrosion resistant, and has high pressure and burst resistance. In addition, each part can also be made of raw materials such as round tubes and square tubes, which are cold-forged or machined, thus using less material and reducing material costs. Furthermore, the size of the parts is reduced and the structural features of each part are reduced, so they can be processed by simpler automated equipment, further reducing processing costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of an embodiment of the air conditioning shut-off valve provided by this utility model;

[0020] Figure 2 A schematic diagram of the valve core seat of one embodiment of the air conditioner shut-off valve provided by this utility model;

[0021] Figure 3 A schematic diagram of the valve core structure of an embodiment of the air conditioning shut-off valve provided by this utility model;

[0022] Figure 4 A schematic diagram of the valve core structure of an embodiment of the air conditioning shut-off valve provided by this utility model;

[0023] Among them, 2-valve core, 3-sealing cap, 11-valve core seat, 12-connecting pipe seat, 13-mounting seat, 111-chamfered structure, 112-connecting hole, welding protrusion-113, 4-connecting pipe, 5-first channel, 6-second channel, 31-external thread, 21-internal thread, 22-pin, 23-internal hexagonal hole, 24-sealing ring groove, 25-screw thread, 121-mounting hole, 122-relief groove, 123-limiting step, 124-welding ring groove, 7-filling nozzle channel, 71-filling nozzle mounting thread, 72-filling nozzle. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please refer to Figures 1-4 , Figure 1 A schematic diagram of the structure of an embodiment of the air conditioning shut-off valve provided by this utility model; Figure 2 A schematic diagram of the valve core seat of one embodiment of the air conditioner shut-off valve provided by this utility model; Figure 3 A schematic diagram of the valve core structure of an embodiment of the air conditioning shut-off valve provided by this utility model; Figure 4A schematic diagram of the valve core structure of one embodiment of the shut-off valve for air conditioning provided by this utility model.

[0026] In one specific embodiment, the air conditioning shut-off valve includes a valve body, a valve core 2, and a sealing cap 3. The valve body includes a valve core seat 11, a connecting pipe seat 12, and a mounting seat 13. The valve core seat 11, the connecting pipe seat 12, and the mounting seat 13 are welded together. The valve core 2 is installed inside the valve core seat 11. The connecting pipe seat 12 is used to connect the connecting pipes 4 of the indoor and outdoor units of the air conditioning system. The connecting pipe seat 12 is provided with a first channel 5 for the valve core 2 to pass through and a second channel 6 for the heat exchange medium of the connecting pipe 4 to pass through. The sealing cap 3 is installed at the inlet and outlet of the second channel 6 and seals the outlet or inlet of the second channel 6. The mounting seat 13 is connected to the outer wall of the valve core seat 11 and is used to install the valve core seat 11 in the air conditioning equipment.

[0027] By disassembling the valve body into multiple components such as valve core seat 11, connecting pipe seat 12, and mounting seat 13, each component is manufactured separately and then assembled. Finally, they are connected into a whole by welding. Each component can be made of materials such as stainless steel and aluminum alloy, which are lightweight, low cost, highly corrosion resistant, and have high pressure burst resistance. In addition, each component can also be made of raw materials such as round tubes and square tubes, and can be made by cold heading or metal processing, which uses less material and reduces material costs. Furthermore, the size of the components is reduced and the structural features of each component are reduced, so they can be processed by simpler automated equipment, which further reduces processing costs.

[0028] Since the valve core seat 11 in this application needs to connect multiple components, if all are connected by snap-fit ​​or bolt, issues such as sealing and space occupation need to be considered. In order to improve installation efficiency, reduce space occupation, and improve sealing, in one embodiment, the air conditioning shut-off valve further includes an external thread 31 provided on the valve core seat 11 for installing the sealing cap 3, an internal thread 21 provided on the valve core seat 11 for installing the valve core 2, and a mounting hole 121 provided on the valve core seat 11 for connecting the connecting pipe seat 12.

[0029] By providing an external thread 31 for installing the sealing cap 3 in the valve core seat 11, the sealing cap 3 can be quickly installed and removed, while maintaining a simple structure and high sealing performance. An internal thread 21 for installing the valve core 2 eliminates the need for drilling in the valve core 2, resulting in high installation efficiency and facilitating subsequent inspection and maintenance of the valve core 2. An installation hole 121 for connecting the connecting pipe seat 12 is provided in the valve core seat 11, facilitating the fixing and sealing of the connecting pipe 4.

[0030] This application does not limit the size, material, specific structure, or shape of the valve core seat 11.

[0031] To further reduce costs, the valve body is made of stainless steel, aluminum alloy, or other materials, including but not limited to metal. The materials of the various components in the valve body can be the same or different.

[0032] The valve body can be a three-way valve body or a two-way valve body.

[0033] This application does not limit the material of the valve core 2 installed in the valve body. The valve core 2 is a stainless steel valve core, a copper valve core, or an aluminum alloy valve core, or a valve core 2 made of other materials.

[0034] In this application, the connecting pipe 4 needs to be installed on the valve core seat. The connection method is not limited. In order to improve the reliability of the installation and increase the connection strength between the valve core seat 11 and the connecting pipe 4, in one embodiment, the air conditioning shut-off valve further includes a welding protrusion 113 provided on the connecting pipe mounting surface of the valve core seat 11. The connecting pipe 4 is welded to the valve core seat 11 through the welding protrusion 113.

[0035] By setting welding protrusions on the mounting surface of the connecting pipe of the valve core seat 11, the connecting pipe 4 is welded to the valve core seat 11 through the welding protrusions. On the one hand, welding can be performed at a designated position to ensure the quality consistency of different products and improve the quality stability of the products. On the other hand, by setting welding protrusions, the solder will not flow randomly during the welding process and will not enter the area outside the welding position, eliminating the need for subsequent cleaning and improving the efficiency and quality of welding.

[0036] This application does not impose any restrictions on the material, structure, number, or distribution of the welding bosses.

[0037] This application does not limit the shape of the valve core seat 11. The valve core seat 11 can be a square valve core seat 11, a round tube valve core seat 11, or a polygonal valve core seat 11, or a valve core seat 11 of other shapes.

[0038] In this application, the connecting pipe seat 12 is installed on the valve core seat 11 for installing the connecting pipe 4. In order to improve installation efficiency and quality, in one embodiment, the air conditioning shut-off valve further includes a relief groove 122 with external thread 31, a limiting step 123 for inserting into the valve core seat 11, and a welding ring groove 124 for placing solder, wherein the solder is a welding ring or welding sheet.

[0039] By setting the relief groove 122, the machining of the external thread 31 is facilitated. The limiting step 123 is set to facilitate precise limiting of the valve core seat 11 after insertion, ensuring the accuracy of the insertion depth. The welding ring groove 124 for placing the solder allows the solder to be pre-placed before welding, which facilitates the improvement of the automation level of welding as well as welding quality and efficiency.

[0040] This application does not limit the shape and size of the relief groove 122, the limiting step 123 and the annular groove, nor does it limit the shape and material of the solder.

[0041] This application does not limit the type of the connecting pipe seat 12. Since the stop valve may be a three-way stop valve or a two-way stop valve, the corresponding connecting pipe seat 12 needs to be able to install the filling nozzle 72 and not have the function of the filling nozzle.

[0042] Therefore, in one embodiment, the air conditioning shut-off valve further includes a filling nozzle channel 7 disposed on the connecting pipe seat 12, a filling nozzle mounting thread 71, and an air inlet mounted on the filling nozzle mounting thread 71, wherein the filling nozzle mounting thread 71 is disposed on the inner wall or outer wall of the filling nozzle channel 7.

[0043] By providing a filling nozzle channel 7 and a filling nozzle mounting thread 71 to the connecting pipe seat 12, the connecting pipe seat 12 is equipped with a filling function, realizing the function of a three-way shut-off valve and improving the function of the shut-off valve.

[0044] This application does not limit the size or shape of the filling nozzle channel 7 of the connecting tube seat 12.

[0045] This application does not limit the material and shape of the connecting pipe seat 12. The outer surface of the connecting pipe seat 12 is a regular polygon, a circle, or other shapes. The connecting pipe seat 12 is a stainless steel connecting pipe seat 12, an aluminum alloy connecting pipe seat 12, or a connecting pipe seat 12 made of other materials.

[0046] The shape and material of the cap 3 in this application are not limited. The cap 3 is a stainless steel cap 3, an aluminum alloy cap 3, a copper cap 3, or a cap 3 made of other materials.

[0047] In one embodiment, the air conditioning shut-off valve preferably has a valve body made of stainless steel by brazing, but it can also be made of aluminum alloy, steel, or other materials. The valve body is divided into three parts, including a valve core seat 11, a connecting pipe seat 12, and a mounting seat 13. After assembling the valve core seat 11, the connecting pipe seat 12, and the mounting seat 13, a welding ring is placed, and then the valve body is brazed in a high-temperature brazing furnace or a vacuum furnace to form the valve body of the shut-off valve. The outer surfaces of the valve core seat 11 and the connecting pipe seat 12 can be polygonal, square, circular, or other shapes.

[0048] The connecting pipe seat 12 is divided into those with and without the function of installing a filling nozzle, corresponding to a three-way shut-off valve and a two-way shut-off valve, respectively.

[0049] The valve core seat 11 is preferably made of stainless steel, but can also be made of aluminum alloy, steel or other materials. It is used to install the valve core 2, and is provided with an external thread 31 for installing the sealing cap 3, an internal thread 21 for installing the valve core 2, and a chamfered structure 111 for hard sealing of the valve core 2. In addition, it is provided with a mounting hole 121 for assembling the connecting pipe seat 12.

[0050] The valve core seat 11 is made of square, round, or polygonal materials. After manufacturing, the shape can be circular, square, or polygonal. It is preferable to use a round tube of the same size as the welding pipe 112. The valve core 2 mounting channel, chamfered structure 111, valve core 2 mounting internal thread 21, cap mounting external thread, connecting pipe seat mounting hole 121, and welding protrusion for the connecting pipe are processed to reduce the amount of stainless steel material used. Alternatively, it can be processed into a square block. When processing the connecting pipe mounting hole 121, the plane is used as the positioning reference, resulting in better dimensional accuracy. The weld size can also be designed as needed to ensure the welding strength.

[0051] The valve core seat 11 is provided with a welding protrusion 113. After the pipe is inserted, it is preferred to use a high-temperature furnace for overall brazing. Flame brazing, high-frequency welding, laser welding, argon arc welding and other welding methods can also be used. Alternatively, the welding protrusion for the pipe can be omitted.

[0052] The valve core seat 11 has two functions: one with an opening and the other without, corresponding to a three-way shut-off valve and a two-way shut-off valve, respectively.

[0053] The connecting pipe seat 12 is divided into those with and without the function of installing a filling nozzle, corresponding to a three-way shut-off valve and a two-way shut-off valve, respectively.

[0054] The connecting pipe seat 12 is made of stainless steel, but can also be made of aluminum alloy, steel, or other materials. It is used to connect the connecting pipe 4 of the indoor and outdoor units of the air conditioning system. It is equipped with a relief groove 122 for machining external threads 31, a limiting step 123 for inserting the valve core seat 11, a welding ring groove 124 for placing the brazing ring, a first channel 5 for the valve core 2 to pass through, a second channel 6 for the heat exchange medium to flow through, a charging nozzle channel 7, and a charging nozzle mounting thread 71, etc.

[0055] The valve core seat 11 is made of square, round tube, polygonal or other materials. After the manufacturing is completed, the shape can be circular, square or polygonal. Square stainless steel round tube is preferred to reduce the amount of material used and the amount of processing work.

[0056] Mounting bracket 13 is preferably made of stainless steel. After the shut-off valve is welded as a whole and assembled into a shut-off valve, it is used to install the shut-off valve on the air conditioning equipment.

[0057] The valve core 2 is preferably made of stainless steel, but can also be made of copper, aluminum alloy, steel, etc. It has a chamfered structure 111, a pin 22, a screw thread 25, a sealing ring groove 24, and an internal hexagonal hole 23. The size of the pin 22 with the chamfered structure 111 is smaller than the size of the first channel 5 hole in the connecting pipe seat 12 through which the valve core 2 passes.

[0058] The cap 3 can be made of materials such as stainless steel, aluminum alloy, copper, or steel. It is formed by cold die casting and then machined with internal threads 21.

[0059] The manufacturing method of the welded shut-off valve for air conditioning is as follows:

[0060] 1. Valve core seat 11 machining: preferably made of square stainless steel block or round tube, using metal processing technology, and machined according to the design dimensions and structure, with valve core 2 installation channel, chamfer structure 111, valve core 2 installation internal thread 21, cap 3 installation thread, connecting pipe seat 12 installation hole 121, etc.

[0061] 2. Machining of connecting pipe seat 12: It is preferably made of stainless steel round tube and machined using metalworking technology according to the design dimensions and structure. It has the following structural features: external thread 31, relief groove 122, limiting step 123 for inserting valve core seat 11, welding ring groove 124 for placing brazing ring, first channel 5 for valve core 2 to pass through, second channel for heat exchange medium to flow through, filling nozzle channel 7, filling nozzle mounting thread 71, etc.

[0062] 3. Mounting base 13 processing: preferably made of stainless steel plate, using a high-speed punch press for continuous stamping;

[0063] 4. Cap 3 processing: preferably made of stainless steel plate, formed by cold die casting, and then the internal thread 21 is made by metal processing. Alternatively, it can be made by stamping with a punch press.

[0064] 5. Valve core 2 machining: Stainless steel is preferred, and metalworking technology is used to process it according to the design dimensions and structure;

[0065] 6. Pre-welding assembly: Apply flux before welding, and assemble the valve core seat 11, connecting pipe seat 12, mounting seat 13, connecting pipe and welding ring, and place them into the fixed fixture.

[0066] 7. High-temperature brazing: The fixtures and components are placed in a high-temperature brazing furnace, vacuum furnace, etc. for high-temperature brazing.

[0067] 8. Post-weld assembly: The semi-finished products after high-temperature brazing are then installed into the air inlet, sealing cap 3, valve core 2, etc., to produce the finished product.

[0068] The above solution has the following beneficial effects:

[0069] The valve body is preferably made of stainless steel, but aluminum alloy, steel, and other materials are also acceptable. Firstly, using stainless steel reduces the use of brass. Secondly, the valve body is assembled from multiple parts, allowing for the use of raw materials such as round or square tubes, manufactured using cold heading or machining, thus reducing material costs. Furthermore, the smaller size and fewer structural features of each component allow for simpler automated processing, further reducing costs. Stainless steel components offer higher strength, corrosion resistance, and pressure burst resistance than copper or aluminum alloys, making them less prone to deformation or corrosion and leakage. Thirdly, the valve body is designed as a three-part assembly with pre-embedded welding rings or solder sheets. Placed in a high-temperature brazing furnace, the welding rings / solder sheets melt and braze into a single structure. This brazing process is more reliable, integrating the welding steps into a single operation, increasing efficiency, and reducing the number of parts, resulting in a lower rate of brazing leaks and better product quality assurance.

[0070] In addition, compared with the manufacturing process of copper gate valves, the die-casting process of the valve body and the flame brazing process of the connecting pipe and the valve body are eliminated, resulting in higher production efficiency and further reduction in processing costs. Compared with the quality abnormalities such as sand holes and air holes that are prone to occur in the die-casting process of the valve body, the brazing process is more reliable and has a lower leakage rate.

[0071] In summary, the air conditioning shut-off valve provided by this utility model disassembles the valve body into multiple components, including a valve core seat, a connecting pipe seat, and a mounting seat. Each component is manufactured separately and then assembled, and finally connected into a whole by welding. Each component can be made of materials such as stainless steel and aluminum alloy, resulting in light weight, low cost, high corrosion resistance, and high pressure and burst resistance. In addition, each component can also be made of raw materials such as round tubes and square tubes, and manufactured by cold heading or metal processing, using less material and reducing material costs. Furthermore, the reduced size of the components and the fewer structural features of each component allow for processing using simpler automated equipment, further reducing processing costs.

[0072] The air conditioning shut-off valve provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A shut-off valve for air conditioning, characterized in that, The system includes a valve body, a valve core, and a sealing cap. The valve body includes a valve core seat, a connecting pipe seat, and a mounting seat. The valve core seat, the connecting pipe seat, and the mounting seat are welded together. The valve core is installed inside the valve core seat. The connecting pipe seat is used to connect to the connecting pipes of the indoor and outdoor units of the air conditioning system. The connecting pipe seat is provided with a first channel for the valve core to pass through and a second channel for the heat exchange medium of the connecting pipe to pass through. The sealing cap is installed at the inlet and outlet of the second channel and seals the outlet or inlet of the second channel. The mounting seat is connected to the outer wall of the valve core seat and is used to install the valve core seat in the air conditioning equipment.

2. The shut-off valve for air conditioning as described in claim 1, characterized in that, It also includes an external thread provided on the valve core seat for installing the sealing cap, an internal thread provided on the valve core seat for installing the valve core, and a mounting hole provided on the valve core seat for connecting the connecting pipe seat.

3. The shut-off valve for air conditioning as described in claim 2, characterized in that, The valve body is made of stainless steel or aluminum alloy.

4. The shut-off valve for air conditioning as described in claim 3, characterized in that, The valve core is made of stainless steel, copper, or aluminum alloy.

5. The shut-off valve for air conditioning as described in claim 4, characterized in that, It also includes a welding protrusion on the mounting surface of the connecting pipe of the valve core seat, through which the connecting pipe is welded to the valve core seat.

6. The shut-off valve for air conditioning as described in claim 5, characterized in that, The valve core seat is a square valve core seat, a round tube valve core seat, or a polygonal valve core seat.

7. The shut-off valve for air conditioning as described in claim 1, characterized in that, It also includes a relief groove for machining external threads, a limiting step for inserting the valve core seat, and a welding ring groove for placing solder, wherein the solder is a welding ring or a welding sheet.

8. The shut-off valve for air conditioning as described in claim 7, characterized in that, It also includes a filling nozzle channel provided in the connecting pipe seat, a filling nozzle mounting thread, and an air nozzle installed in the filling nozzle mounting thread, wherein the filling nozzle mounting thread is provided on the inner wall or outer wall of the filling nozzle channel.

9. The shut-off valve for air conditioning as described in claim 8, characterized in that, The outer surface of the connecting pipe seat is a regular polygon or a circle, and the connecting pipe seat is a stainless steel connecting pipe seat or an aluminum alloy connecting pipe seat.

10. The shut-off valve for air conditioning as described in claim 1, characterized in that, The cap is a stainless steel cap, an aluminum alloy cap, or a copper cap.

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