Main valve, switching valve, and machining method

Abstract

The present application provides a main valve, a switching valve, and a machining method. The main valve comprises a valve tube, the side wall of the valve tube has a plurality of assembly holes for mounting connecting tubes, the side wall of the valve tube also has a mounting hole, and the mounting hole is used for mounting a pilot valve, wherein the mounting hole and one assembly hole are coaxially arranged. In the solution, the mounting hole and one assembly hole are coaxially arranged, facilitating the machining of the two holes; the mounting hole can be formed by stamping with a punch head that passes through the corresponding assembly hole, so that after the assembly hole has been machined, the mounting hole can be immediately machined without re-clamping the main valve, reducing the number of times of clamping and improving machining efficiency; in addition, the mounting hole is formed by stamping outward from the inside of the valve tube, so that the formed hole is a hole having an outer flange, and upon connection to the pilot valve, said hole has a longer connection region than existing holes without flanges, improving connection strength. The solution improves the machining efficiency of the main valve and the connection strength between the main valve and the pilot valve.

Description

Main valve, switching valve and processing method

[0001] The present application claims priority to the patent application No. 2024106273519 filed on May 20, 2024 in China National Intellectual Property Office, and entitled "Main valve, switching valve, main valve processing method and switching valve processing method"; and the patent application No. 2024227458667 filed on November 11, 2024 in China National Intellectual Property Office, and entitled "Switching valve". TECHNICAL FIELD

[0002] The present application relates to the technical field of switching valve, in particular, relates to a main valve, a switching valve and a processing method. BACKGROUND

[0003] The switching valve, such as a four-way valve, is used to change the fluid flow direction, and the switching valve mainly includes a main valve, a pilot valve, a connecting pipe, a capillary tube and the like. In the existing switching valve, the pilot valve and the main valve are usually connected by a specially arranged bracket, that is, the bracket is installed on the main valve, and the pilot valve is installed on the bracket, and the pilot valve and the main valve are spaced apart. This scheme has many parts and high cost. With the development of technology, in some schemes, the bracket is cancelled, and the pilot valve and the main valve are directly connected, which can reduce the number of parts and reduce the cost.

[0004] However, in the main valve of the above-mentioned switching valve, a plurality of holes need to be processed to connect the pilot valve and the plurality of connecting pipes respectively, the hole for installing the pilot valve and the hole for installing the connecting pipe are independent of each other, and need to be processed from different positions outside the main valve, so the clamping times are many, and the connection position with the pilot valve is thin, thereby affecting the processing efficiency of the main valve and the connection strength with the pilot valve. SUMMARY

[0005] The present application provides a main valve, a switching valve and a processing method to at least solve the problem of low processing efficiency of the main valve in the prior art.

[0006] In order to solve the above-mentioned problems, according to one aspect of the present application, the present application provides a main valve for a switching valve, the main valve comprising a valve pipe, a side wall of the valve pipe having a plurality of assembly holes for installing connecting pipes, the side wall of the valve pipe further having an installation hole for installing a pilot valve; wherein the installation hole and one assembly hole are coaxially arranged, and the side wall of the valve pipe is further provided with a D hole for installing a connecting pipe, and the D hole and one assembly hole are coaxially arranged.

[0007] Further, the diameter of the installation hole is less than or equal to the diameter of the corresponding assembly hole; and / or, the diameter of the D hole is less than or equal to the diameter of the corresponding assembly hole.

[0008] Further, the periphery of the installation hole has a flange towards the outside of the valve pipe; and / or, the periphery of the D hole has a flange towards the outside of the valve pipe.

[0009] Further, the plurality of assembly holes include an E hole, an S hole and a C hole arranged in sequence along the length direction of the valve pipe, wherein one of the mounting hole and the D hole is coaxially arranged with the C hole, and the other is coaxially arranged with the E hole.

[0010] According to another aspect of the present application, a switching valve is provided, which includes the above-mentioned main valve, one end of the pilot valve is connected to the mounting hole of the main valve, and the switching valve further includes a plurality of connecting pipes and a plurality of capillary tubes, each assembly hole is connected to one connecting pipe, one end of each capillary tube is connected to the pilot valve, the other end of at least one capillary tube is connected to the valve pipe, and the other end of at least one capillary tube is connected to the connecting pipe.

[0011] Further, the hole on the pilot valve for connecting the capillary tube, the hole on the valve pipe for connecting the capillary tube, and the hole on the connecting pipe for connecting the capillary tube all face the same direction.

[0012] Further, the plurality of capillary tubes are all of an integral structure, each capillary tube is directly connected to the pilot valve, the valve pipe is directly connected to the corresponding capillary tube, and the connecting pipe is directly connected to the corresponding capillary tube.

[0013] Further, the valve pipe, the pilot valve, the capillary tube and the connecting pipe are all made of stainless steel, and the connection between any two of them is welding.

[0014] Further, the hole on the valve pipe for connecting the capillary tube is a first hole, the first hole has a flange facing outward of the valve pipe, the hole on the connecting pipe for connecting the capillary tube is a second hole, the second hole has a flange facing inward of the connecting pipe, and the switching valve further includes a sleeve, one end of the pilot valve penetrates into the sleeve and is welded to the inner wall of the sleeve, and the sleeve penetrates into the mounting hole and is welded to the inner wall of the mounting hole.

[0015] Further, the valve pipe has a first valve cavity, the pilot valve has a housing, the housing has a second valve cavity, and the switching valve further includes: a mounting pipe, the mounting pipe is used to communicate the first valve cavity and the second valve cavity, the mounting pipe is arranged between the valve pipe and the housing, one end of the mounting pipe is fixedly connected to the mounting hole, the other end of the mounting pipe is fixedly connected to one end of the housing, the housing is supported on the valve pipe through the mounting pipe, and the mounting pipe is a bent pipe.

[0016] Further, the mounting pipe is arranged side by side with the connecting pipe, and the end of the mounting pipe which communicates with the housing extends away from the connecting pipe, or the valve pipe and the housing are arranged parallel to each other, or the mounting pipe is fixedly connected to the valve pipe and the housing through welding, or a plug-in structure is arranged between the mounting pipe and the housing, the mounting pipe is plug-in matched with the housing through the plug-in structure, one end of the housing connected to the mounting pipe is provided with an end cover, the end cover has a plug-in groove extending into the second valve cavity, and the mounting pipe is plug-in matched with the plug-in groove.

[0017] Further, a filter is arranged between the second valve cavity and the mounting pipe, and an end face of the end of the housing connected to the mounting pipe is provided with a connecting hole, the second valve cavity communicates with the mounting pipe through the connecting hole, and the filter is arranged at the connecting hole.

[0018] According to another aspect of the present application, a main valve machining method is provided for the main valve described above, the main valve machining method comprising:

[0019] A plurality of assembly holes are machined on the valve pipe of the main valve, and the assembly holes are used for mounting the connecting pipes;

[0020] A machining tool is inserted into one assembly hole, and a mounting hole is machined on the side wall of the valve pipe, and the mounting hole is used for mounting the pilot valve;

[0021] A machining tool is inserted into another assembly hole, and a D hole is machined on the side wall of the valve pipe, and the D hole is used for mounting the connecting pipe.

[0022] Further, the machining tool is a punch, and the main valve machining method further comprises:

[0023] Before the mounting hole is punched, a first pre-hole is machined on the side wall of the valve pipe at a position corresponding to one assembly hole, and the diameter of the first pre-hole is smaller than that of the mounting hole; when the mounting hole is machined, the first pre-hole is extruded by the punch to form the mounting hole;

[0024] Before the D hole is punched, a second pre-hole is machined on the side wall of the valve pipe at a position corresponding to another assembly hole, and the diameter of the second pre-hole is smaller than that of the D hole; when the D hole is machined, the second pre-hole is extruded by the punch to form the D hole, or,

[0025] The valve pipe is placed in a bottom die, and the bottom die has a first forming hole and a second forming hole; wherein the punch penetrates the first forming hole, and under the action of the punch and the first forming hole, the mounting hole with an outward flange is formed; the punch penetrates the second forming hole, and under the action of the punch and the second forming hole, the mounting hole with an outward flange is formed.

[0026] Further, the switching valve machining method comprises:

[0027] A sleeve is arranged between the mounting hole of the main valve and one end of the pilot valve, the outer wall of the pilot valve and the inner wall of the sleeve are welded, and the outer wall of the sleeve and the inner wall of the mounting hole are welded, or,

[0028] The main valve, the pilot valve, the connecting pipe and the capillary tube of the switching valve are made of stainless steel material, and the main valve, the pilot valve, the connecting pipe and the capillary tube are mounted and furnace welded together.

[0029] The technical scheme is applied to provide a main valve for a switching valve, the main valve comprises a valve pipe, a side wall of the valve pipe has a plurality of assembly holes for mounting a connecting pipe, and the side wall of the valve pipe also has a mounting hole for mounting a pilot valve; wherein the mounting hole and one assembly hole are coaxially arranged. In this scheme, the mounting hole and one assembly hole are coaxially arranged, facilitating the machining of the two holes, the mounting hole can be punched and formed by a punch penetrating from the corresponding assembly hole, so that after the assembly hole is machined, the mounting hole can be continuously machined without re-clamping the main valve, reducing the clamping times and improving the machining efficiency, and the mounting hole is punched and formed from the inside of the valve pipe to the outside, so that the formed hole is a hole with an outward flange, and after being connected with the pilot valve, the connection area is longer than the hole without a flange in the prior art, improving the connection strength. Therefore, through this scheme, the machining efficiency of the main valve and the connection strength of the main valve and the pilot valve are improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] The drawings accompanying the specification of this application form a part thereof, serve to further provide a further understanding of the application, and together with the description of the exemplary embodiments of the application, serve to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0031] Fig. 1 shows a perspective view of a main valve provided by an embodiment of the application;

[0032] Fig. 2 shows a front view of the main valve in Fig. 1;

[0033] Fig. 3 shows a punching diagram of the main valve in Fig. 1;

[0034] Fig. 4 shows a perspective view of a switching valve provided by an embodiment of the application;

[0035] Fig. 5 shows a sectional view of the switching valve provided by an embodiment of the application;

[0036] Fig. 6 shows a partial enlarged view of Fig. 5;

[0037] Fig. 7 shows a connection diagram of a main valve and a pilot valve in a switching valve provided by another embodiment of the application;

[0038] Fig. 8 shows a connection diagram of a main valve and a pilot valve in a switching valve provided by still another embodiment of the application;

[0039] Fig. 9 shows a structural diagram of a housing of a pilot valve provided by still another embodiment of the application;

[0040] Fig. 10 shows a partial enlarged view of A in Fig. 8.

[0041] Wherein, the above-mentioned drawings include the following reference signs: 10, valve pipe; 11, assembly hole; 12, mounting hole; 13, D hole; 14, first hole; 20, pilot valve; 21, end cover; 22, connecting hole; 30, connecting pipe; 301, D connecting pipe; 302, E connecting pipe; 303, S connecting pipe; 304, C connecting pipe; 31, second hole; 40, capillary tube; 50, sleeve; 60, punch; 70, bottom die; 80, mounting pipe; 90, filter element. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0043] As shown in FIGS. 1-7, the embodiments of the present application provide a main valve for a switching valve, the main valve comprising a valve pipe 10, the side wall of the valve pipe 10 having a plurality of assembly holes 11 for mounting connecting pipes 30, the side wall of the valve pipe 10 further having a mounting hole 12 for mounting a pilot valve 20; wherein the mounting hole 12 and one assembly hole 11 are coaxially arranged.

[0044] In this scheme, the mounting hole 12 and one assembly hole 11 are coaxially arranged, facilitating the machining of the two holes, the mounting hole 12 can be formed by a punch 60 inserted from the corresponding assembly hole 11, so that after the assembly hole 11 is machined, the mounting hole can be continuously machined without re-clamping the main valve, reducing the clamping times and improving the machining efficiency, and the mounting hole 12 is formed by punching from the inside of the valve pipe 10 to the outside, so that the formed hole is a hole with an outward flange, and after being connected with the pilot valve 20, the connection area is longer than the hole without a flange in the prior art, improving the connection strength. Therefore, through this scheme, the machining efficiency of the main valve and the connection strength of the main valve and the pilot valve 20 are improved.

[0045] Wherein, the diameter of the mounting hole 12 is less than or equal to the diameter of the corresponding assembly hole 11, so that the diameter of the punch 60 or other tools used to machine the mounting hole 12 is smaller than the diameter of the assembly hole 11, ensuring that the punch 60 or other tools can extend into the assembly hole 11.

[0046] After the punch 60 is formed, the peripheral edge of the mounting hole 12 has a flange towards the outside of the valve pipe 10, which improves the connection strength with the pilot valve 20 through the flange.

[0047] Further, the side wall of the valve pipe 10 is further provided with a D hole 13 for mounting the connecting pipe 30, the D hole 13 and one assembly hole 11 are coaxially arranged, so as to facilitate the machining of the D hole 13 and the corresponding assembly hole 11.

[0048] Through the above arrangement, after the assembly hole 11 is machined, the main valve does not need to be re-clamped to continue machining the D hole 13, thereby reducing the clamping times and improving the machining efficiency. Specifically, the D hole 13 can be punched and formed by a punch 60 penetrating from the corresponding assembly hole 11, that is, the D hole 13 is punched and formed from the inside of the valve pipe 10 to the outside, so that the formed hole is a hole with an outward flange, which improves the connection strength after being connected with one connecting pipe 30.

[0049] Specifically, the diameter of the D hole 13 is less than or equal to the diameter of the corresponding assembly hole 11, so that the diameter of the punch 60 or other tools used for machining the D hole 13 is less than the diameter of the assembly hole 11, ensuring that the punch 60 or other tools can extend into the assembly hole 11.

[0050] The periphery of the D hole 13 has a flange towards the outside of the valve pipe 10, which improves the connection strength with the connecting pipe.

[0051] As shown in FIGS. 1, 2 and 5, the plurality of assembly holes 11 include E holes, S holes and C holes arranged in sequence along the length direction of the valve pipe 10, wherein one of the mounting hole 12 and the D hole 13 is coaxially arranged with the C hole, and the other is coaxially arranged with the E hole. In this way, the mounting hole 12 and the D hole 13 can be spaced apart by one assembly hole 11, avoiding that the mounting hole 12 and the D hole 13 are too close to affect the forming quality, and also avoiding that the two holes are too close to affect the installation of the connecting pipe 30 and the pilot valve 20.

[0052] As shown in FIGS. 4 to 6, the application further provides a switching valve, which comprises the pilot valve 20 and the above-mentioned main valve, and one end of the pilot valve 20 is connected with the mounting hole 12 of the main valve. In this scheme, the mounting hole 12 and one assembly hole 11 are coaxially arranged, and the mounting hole 12 is punched and formed by a punch 60 penetrating from the corresponding assembly hole 11, so that after the assembly hole 11 is machined, the main valve does not need to be re-clamped to continue machining the mounting hole, thereby reducing the clamping times and improving the machining efficiency, and the mounting hole 12 is punched and formed from the inside of the valve pipe 10 to the outside, so that the formed hole is a hole with an outward flange, which has a longer connection area compared with the hole without the flange in the prior art after being connected with the pilot valve 20, thereby improving the connection strength. Therefore, through the present scheme, the machining efficiency of the switching valve and the connection strength between the main valve and the pilot valve 20 are improved.

[0053] As shown in Fig. 4, the switching valve further comprises a plurality of connecting pipes 30 and a plurality of capillary tubes 40, one connecting pipe 30 is connected to each assembly hole 11, one end of each capillary tube 40 is connected to the pilot valve 20, the other end of at least one capillary tube 40 is connected to the valve pipe 10, and the other end of at least one capillary tube 40 is connected to the connecting pipe 30. The connecting pipe 30 is used to connect with other pipelines to realize fluid flow. The capillary tube 40 is used to associate the fluid in the pilot valve 20 with the fluid in the main valve, so as to realize the switching of the main valve through the action of the pilot valve 20, and change the fluid flow direction. The switching valve can be a four-way valve.

[0054] Specifically, the holes of the pilot valve 20, the holes of the valve pipe 10, and the holes of the connecting pipe 30 connected to the capillary tube 40 all face the same direction. In this way, the plurality of capillary tubes 40 are located on the same side of the switching valve, which facilitates the arrangement and connection of the capillary tubes 40. Specifically, the axial directions of the holes connected to the capillary tubes 40 are perpendicular to the axial directions of the valve pipe 10 and the connecting pipe.

[0055] Specifically, the holes of the pilot valve 20, the holes of the valve pipe 10, and the holes of the connecting pipe 30 connected to the capillary tube 40 all face the same direction. In this way, the plurality of capillary tubes 40 are located on the same side of the switching valve, which facilitates the arrangement and connection of the capillary tubes 40. Specifically, the axial directions of the holes connected to the capillary tubes 40 are perpendicular to the axial directions of the valve pipe 10 and the connecting pipe.

[0056] Specifically, the valve pipe 10, the pilot valve 20, the capillary tube 40, and the connecting pipe 30 are all made of stainless steel, and the connections between any two of them are all welding. The use of stainless steel material has low cost, and the connection positions of the two parts can be directly welded, which has high welding strength. Therefore, the production cost can be reduced through this setting.

[0057] Specifically, the valve pipe 10, the pilot valve 20, the capillary tube 40, and the connecting pipe 30 are all made of stainless steel, and the connections between any two of them are all welding. The use of stainless steel material has low cost, and the connection positions of the two parts can be directly welded, which has high welding strength. Therefore, the production cost can be reduced through this setting.

[0058] As shown in Fig. 1, Fig. 5 and Fig. 6, the hole of the valve pipe 10 connected to the capillary tube 40 is a first hole 14, the first hole 14 has a flange facing outward of the valve pipe 10, and the hole of the connecting pipe 30 connected to the capillary tube 40 is a second hole 31, the second hole 31 has a flange facing inward of the connecting pipe 30.

[0059] The flange can improve the connection strength of the capillary tube 40. The first hole 14 has a flange facing outward of the valve pipe 10, which can avoid interference with the structure inside the valve pipe 10. The second hole 31 has a flange facing inward of the connecting pipe 30, which is easier to process than the flange facing outward.

[0060] As shown in Fig. 7, in another embodiment, the switching valve further comprises a sleeve 50, one end of the pilot valve 20 penetrates into the sleeve 50 and is welded with the inner wall of the sleeve 50, and the sleeve 50 penetrates into the mounting hole 12 and is welded with the inner wall of the mounting hole 12. By providing the sleeve 50, the connection strength of the main valve and the pilot valve 20 can be improved. The length of the sleeve 50 is greater than the length of the mounting hole 12.

[0061] As shown in Figs. 8 to 10, in another embodiment of the present application, a switching valve is provided, which comprises the above-mentioned main valve and a mounting pipe 80. The valve pipe 10 has a first valve cavity. The pilot valve 20 has a shell with a second valve cavity. The mounting pipe 80 is fixedly arranged between the valve pipe 10 and the second shell, and is used to communicate the first valve cavity and the second valve cavity. One end of the mounting pipe 80 is fixedly connected with the side wall of the valve pipe 10, and the other end of the mounting pipe 80 is fixedly connected with one end of the shell. The shell is supported on the valve pipe 10 through the mounting pipe 80, and the mounting pipe 80 is a bent pipe. In this way, the mounting pipe 80 can support the pilot valve 20 to fix the pilot valve 20 on the valve pipe 10, realizing the connection of the valve pipe 10 and the pilot valve 20. In addition, the mounting pipe 80 can also communicate the second valve cavity and the first valve cavity, realizing the flow of fluid. In the conventional technical solution, a capillary tube is usually used to communicate the first valve cavity and the second valve cavity. In the present application, the mounting pipe 80 is used to support the pilot valve 20, and at the same time, it can also be used to communicate the first valve cavity and the second valve cavity, without the need to additionally provide a capillary tube to communicate the first valve cavity and the second valve cavity. This reduces the number of parts, reduces the production cost, simplifies the assembly steps, and improves the overall assembly efficiency of the switching valve. At the same time, by setting the mounting pipe 80 as a bent pipe, the position of the pilot valve 20 relative to the valve pipe 10 can be more reasonable after the pilot valve 20 is fixed to the valve pipe 10, which reduces the overall space occupied by the switching valve and provides operation space for the installation tool, facilitating the installation of the pilot valve 20.

[0062] In addition, in the conventional technical solution, the pilot valve 20 needs to be installed in parallel with the valve pipe 10. In the present application, the shell and the valve pipe 10 are arranged in parallel with each other, i.e. the mounting pipe 80 is formed as a 90° bent pipe. In this way, the installation direction of the pilot valve 20 and the electromagnetic coil can not be changed, and the installation equipment of the pilot valve 20 and the electromagnetic coil does not need to be redesigned. The overall air conditioning system using the switching valve does not need to change the layout for matching the mounting pipe 80, reducing the influence of replacing parts on the overall air conditioning system.

[0063] Specifically, the valve pipe 10 is provided with a D communication pipe 301, an E communication pipe 302, an S communication pipe 303 and a C communication pipe 304, wherein the D communication pipe 301 communicates with the gas outlet of the compressor, the S communication pipe 303 communicates with the gas inlet of the compressor, the E communication pipe 302 communicates with the heat exchanger on the indoor side, the C communication pipe 304 communicates with the heat exchanger on the outdoor side, the E communication pipe 302, the S communication pipe 303 and the C communication pipe 304 are arranged on one side of the valve pipe 10 along the axis direction of the valve pipe 10, the D communication pipe 301 is arranged on the other side of the axis of the valve pipe 10 relative to the E communication pipe 302, the S communication pipe 303 and the C communication pipe 304, the mounting pipe 80 is arranged side by side with the D communication pipe 301, and the end of the mounting pipe 80 communicated with the valve pipe 10 extends away from the D communication pipe 301. Through the above arrangement, the shell of the pilot valve 20 connected with the mounting pipe 80 extends away from the D communication pipe 301, which can provide a mounting space for the electromagnetic coil, facilitate the installation of the electromagnetic coil, prevent the D communication pipe 301 from affecting the assembly of the electromagnetic coil, and further improve the assembly efficiency.

[0064] It is worth noting that the valve pipe 10 and the shell can both be tubular structures to facilitate the processing and forming of the valve pipe 10 and the shell. They can also be arranged in other shapes, which can be adjusted according to actual needs, and the present application does not make specific limitations.

[0065] Specifically, in the present application, a first plug-in structure is arranged between the mounting pipe 80 and the valve pipe 10, and the mounting pipe 80 is plug-in matched with the valve pipe 10 through the first plug-in structure. The cooperation of the pilot valve 20 and the mounting pipe 80 forms a cantilever structure, which has a high requirement for the connection strength of the mounting pipe 80 and the valve pipe 10. Through the above arrangement, the use of the first plug-in structure can ensure the connection strength of the mounting pipe 80 and the valve pipe 10, prevent cracking at the connection between the mounting pipe 80 and the valve pipe 10, and ensure the structural stability of the switching valve.

[0066] In a specific embodiment of the present application, a flange is arranged on the outer periphery of the mounting hole 12, and the flange forms a plug-in structure. The mounting pipe 80 is plug-in matched with the valve pipe 10 through the flange. By arranging the flange, the stress can be dispersed, and the stress concentration at the mounting hole 12 can be reduced, thereby improving the reliability of the connection between the mounting pipe 80 and the valve pipe 10, increasing the contact area between the mounting hole 12 and the mounting pipe 80, and improving the stability of the connection. In addition, the flange can be formed by reaming or stamping the valve pipe 10 itself to reduce the manufacturing cost of the valve pipe 10.

[0067] Alternatively, the flange can be directed towards the outside of the first valve cavity, or towards the inside of the first valve cavity, as long as it can improve the connection strength between the mounting pipe 80 and the valve pipe 10.

[0068] In still another specific embodiment of the present application, the outer periphery of the mounting hole 12 is provided with a boss, which forms a plug-in structure, and the mounting pipe 80 is plugged into the valve pipe 10 through the boss. By providing the boss, the structural strength of the periphery of the mounting hole 12 can be improved, and the connection between the mounting hole 12 and the mounting pipe 80 is more stable and less likely to be deformed or broken under stress.

[0069] Further, a second plug-in structure is provided between the mounting pipe 80 and the housing, and the mounting pipe 80 is plugged into the housing through the second plug-in structure. In the conventional technical solution, the pilot valve 20 is fixed to the side wall of the valve pipe 10 by a bracket. In the present solution, the second plug-in structure can improve the connection strength between the housing and the mounting pipe 80, prevent cracks from occurring between the pilot valve 20 and the mounting pipe 80, and ensure the stability of the connection between the pilot valve 20 and the mounting pipe 80.

[0070] In one specific embodiment of the present application, as shown in FIGS. 9 and 10, the end of the housing connected to the mounting pipe 80 is provided with an end cover 21, which has a plug-in groove extending into the second valve cavity, and the mounting pipe 80 is plugged into the plug-in groove. Through the above arrangement, the mounting pipe 80 is inserted into the plug-in groove, which can increase the fitting area between the mounting pipe 80 and the housing, improve the support effect of the mounting pipe 80 on the housing, and make the connection between the housing and the mounting pipe 80 more stable. In addition, the groove bottom of the plug-in groove can also provide positioning for the connection of the mounting pipe 80, facilitate the installation of the mounting pipe 80 in place, and improve the assembly efficiency.

[0071] In still another specific embodiment of the present application, a ring groove can also be provided on the inner wall of the end of the mounting pipe 80 that cooperates with the pilot valve 20, and the housing is plugged into the ring groove, which forms the second plug-in structure.

[0072] Specifically, the mounting pipe 80 is fixedly connected to the valve pipe 10 and the housing by welding. The welding connection can ensure the connection strength between the valve pipe 10, the housing and the mounting pipe 80, and further ensure the structural stability of the overall switch valve. Optionally, the welding method can be furnace welding, brazing or laser welding, etc., as long as it can improve the connection strength.

[0073] In one specific structure of the present application, a filter 90 is provided between the second valve cavity and the mounting pipe 80. By providing the filter 90, the adhesion of impurities in the first valve cavity and the second valve cavity can be reduced, the wear of the valve core and other components of the switch valve can be reduced, and the service life of the switch valve can be improved.

[0074] As shown in FIG. 10, the end face of the end of the housing connected to the mounting pipe 80 is provided with a connection hole 22, the second valve cavity communicates with the mounting pipe 80 through the connection hole 22, and the filter 90 is arranged at the connection hole 22. Through the above arrangement, the filter 90 can filter the refrigerant flowing through the connection hole 22, and reduce the adhesion of impurities in the first valve cavity and the second valve cavity.

[0075] Optionally, the filter 90 can be arranged on the side of the connecting hole 22 close to the second valve cavity, or on the side of the connecting hole 22 close to the mounting pipe 80.

[0076] Specifically, the filter 90 can be a metal wire mesh arranged on the housing by welding or other clamping structures.

[0077] The application further provides a main valve processing method for the main valve, which comprises the following steps: processing a plurality of assembly holes 11 on the valve pipe 10 of the main valve, the assembly holes 11 being used for mounting the connecting pipes 30; inserting a processing tool into one assembly hole 11 and processing a mounting hole 12 on the side wall of the valve pipe 10, the mounting hole 12 being used for mounting the pilot valve 20.

[0078] By this method, the mounting hole 12 is formed by a punch 60 penetrating from the corresponding assembly hole 11, so that the mounting hole 12 can be processed continuously after the assembly hole 11 is processed without re-clamping the main valve, thereby reducing the clamping times and improving the processing efficiency, and the mounting hole 12 is formed by punching from the inside of the valve pipe 10 to the outside, so that the formed hole is a hole with an outer flange, and the connection area is longer compared with the hole without flange in the prior art after being connected with the pilot valve 20, thereby improving the connection strength.

[0079] In this embodiment, the assembly hole 11 is processed by laser cutting.

[0080] Further, the main valve processing method further comprises the following steps: inserting the processing tool into another assembly hole 11 and processing a D hole 13 on the side wall of the valve pipe 10, the D hole 13 being used for mounting the connecting pipe 30. In this way, the punch 60 can be inserted and the D hole 13 can be punched by utilizing the position of the assembly hole 11.

[0081] In this way, the D hole 13 can be processed continuously after the assembly hole 11 is processed without re-clamping the main valve, thereby reducing the clamping times and improving the processing efficiency, and the D hole 13 is formed by punching from the inside of the valve pipe 10 to the outside, so that the formed hole is a hole with an outer flange, and the connection area is longer compared with the hole without flange in the prior art after being connected with the connecting pipe 30, thereby improving the connection strength.

[0082] In this embodiment, the D hole 13 and the mounting hole 12 have the same diameter, and the same punch 60 is used.

[0083] Further, the machining tool is a punch 60, and the main valve machining method further comprises: before stamping the mounting hole 12, machining a first pre-hole in the position corresponding to one of the assembly holes 11 on the side wall of the valve pipe 10, the diameter of the first pre-hole being smaller than the mounting hole 12; when machining the mounting hole 12, extruding the first pre-hole by the punch 60 and forming the mounting hole 12; before stamping the D hole 13, machining a second pre-hole in the position corresponding to the other of the assembly holes 11 on the side wall of the valve pipe 10, the diameter of the second pre-hole being smaller than the D hole 13; when machining the D hole 13, extruding the second pre-hole by the punch 60 and forming the D hole 13.

[0084] The first pre-hole and the second pre-hole can be machined by laser cutting or blanking. By setting the first pre-hole and the second pre-hole, the punch 60 can be positioned more accurately. Compared with direct punching, the cracking of the punched flange can be avoided.

[0085] Further, as shown in FIG. 3, the main valve machining method further comprises: placing the valve pipe 10 into a bottom die 70, the bottom die 70 having a first forming hole and a second forming hole; wherein the punch 60 penetrates into the first forming hole, and under the action of the punch 60 and the first forming hole, the mounting hole 12 with an outward flange is formed; the punch 60 penetrates into the second forming hole, and under the action of the punch 60 and the second forming hole, the mounting hole 12 with an outward flange is formed. The bottom die 70 can position the main valve, guide the punch 60, and limit the flange to make the flange meet the required shape.

[0086] The application also provides a switching valve machining method, which is used for the switching valve described above, and comprises: setting a sleeve 50 between the mounting hole 12 of the main valve and one end of the pilot valve 20, welding the outer wall of the pilot valve 20 and the inner wall of the sleeve 50, and welding the outer wall of the sleeve 50 and the inner wall of the mounting hole 12. By setting the sleeve 50 and welding, the reliable connection of the pilot valve 20 and the main valve can be achieved.

[0087] The application also provides another switching valve machining method, which is used for the switching valve described above, and comprises: making the main valve, the pilot valve 20, the connecting pipe 30 and the capillary tube 40 of the switching valve from stainless steel material, and installing and furnace welding the main valve, the pilot valve 20, the connecting pipe 30 and the capillary tube 40 together. The stainless steel material is low in cost, and the multiple parts are connected together and then furnace welded, which is high in efficiency and strength. Therefore, the production cost can be reduced by this method.

[0088] The above only describes the preferred embodiments of the application and is not used to limit the application. Various modifications and changes can be made by those skilled in the art based on the principles and spirit of the application. Any modification, equivalent replacement, improvement, etc. made within the principles and spirit of the application shall be included in the protection scope of the application.

[0089] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0090] The relative arrangement of components and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the application unless specifically so stated. It is also to be understood that the dimensions shown in the drawings are not necessarily to scale, and that the various portions of the drawings are shown by way of example only and not limitation. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail in order to avoid obscuring the description of the present application. In all examples shown and discussed herein, any specific values should be interpreted as illustrative only and not as a limitation. Other examples of the example embodiments can have different values. It is noted that like references and designations can indicate like items in the drawings, and once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0091] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by orientation words such as "front, back, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without the opposite indication, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application. The orientation words "inner, outer" refer to the inner and outer relative to the contour of the components themselves.

[0092] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical", "horizontal", and derivatives thereof shall relate to the application as oriented in the drawing figures. However, it is to be understood that the application can assume various alternative orientations and, accordingly, such terms are not to be taken as limitations of the present application or any application specifically disclosed herein.

[0093] In addition, it should be noted that the terms "first", "second", and so on, used to describe various components, are only intended to distinguish one component from another, and are not otherwise intended to refer to a particular order or order of use. Unless otherwise stated, the above terms do not have special meanings and should not be construed as limiting the scope of the present application.

Claims

1. A main valve for use in a switching valve, characterized by, The main valve comprises a valve pipe (10), the side wall of the valve pipe (10) has a plurality of assembly holes (11) for mounting connecting pipes (30), and the side wall of the valve pipe (10) also has a mounting hole (12) for mounting a pilot valve (20); wherein the mounting hole (12) and one of the assembly holes (11) are coaxially arranged, and the side wall of the valve pipe (10) is also provided with a D hole (13) for mounting a connecting pipe (30), and the D hole (13) and one of the assembly holes (11) are coaxially arranged.

2. The main valve according to claim 1, characterized in that The diameter of the mounting hole (12) is less than or equal to the diameter of the corresponding assembly hole (11); and / or, the diameter of the D hole (13) is less than or equal to the diameter of the corresponding assembly hole (11).

3. The master valve of claim 1, wherein, The peripheral edge of the mounting hole (12) has a flange towards the outside of the valve pipe (10); and / or, the peripheral edge of the D hole (13) has a flange towards the outside of the valve pipe (10).

4. The master valve of claim 2, wherein, The plurality of assembly holes (11) include an E hole, an S hole and a C hole arranged in sequence along the length direction of the valve pipe (10), wherein one of the mounting hole (12) and the D hole (13) is coaxially arranged with the C hole, and the other is coaxially arranged with the E hole.

5. A switching valve characterized by comprising: The switching valve comprises a pilot valve (20) and a main valve according to any one of claims 1 to 4, one end of the pilot valve (20) is connected with the mounting hole (12) of the main valve, the switching valve further comprises a plurality of connecting pipes (30) and a plurality of capillary tubes (40), each of the assembly holes (11) is connected with one of the connecting pipes (30), one end of each of the capillary tubes (40) is connected with the pilot valve (20), the other end of at least one of the capillary tubes (40) is connected with the valve pipe (10), and the other end of at least one of the capillary tubes (40) is connected with the connecting pipe (30).

6. The switching valve according to claim 5, characterized by The holes on the pilot valve (20) for connecting the capillary tubes (40), the holes on the valve pipe (10) for connecting the capillary tubes (40), and the holes on the connecting pipe (30) for connecting the capillary tubes (40) all face the same direction.

7. The switching valve according to claim 5, characterized by The plurality of capillary tubes (40) are all of an integral structure, each of the capillary tubes (40) is directly connected with the pilot valve (20), the valve pipe (10) is directly connected with the corresponding capillary tube (40), and the connecting pipe (30) is directly connected with the corresponding capillary tube (40).

8. The switching valve of claim 5, wherein The valve pipe (10), the pilot valve (20), the capillary tube (40) and the connecting pipe (30) are all made of stainless steel, and the connection between any two of them is welding.

9. The switching valve of claim 5, wherein The hole of the valve pipe (10) connecting the capillary tube (40) is a first hole (14), the first hole (14) has a flange towards the outside of the valve pipe (10), the hole of the connecting pipe (30) connecting the capillary tube (40) is a second hole (31), the second hole (31) has a flange towards the inside of the connecting pipe (30), the switching valve further comprises a sleeve (50), one end of the pilot valve (20) penetrates the sleeve (50) and is welded with the inner wall of the sleeve (50), the sleeve (50) penetrates the mounting hole (12) and is welded with the inner wall of the mounting hole (12).

10. The switching valve according to claim 5, wherein, The valve pipe (10) has a first valve cavity, the pilot valve (20) has a shell, the shell has a second valve cavity, and the switching valve further comprises: A mounting pipe (80) is used to communicate the first valve cavity and the second valve cavity, the mounting pipe (80) is arranged between the valve pipe (10) and the shell, one end of the mounting pipe (80) is fixedly connected with the mounting hole (12), the other end of the mounting pipe (80) is fixedly connected with one end of the shell, the shell is supported on the valve pipe (10) through the mounting pipe (80), and the mounting pipe (80) is a bent pipe.

11. The switching valve of claim 10, wherein The mounting pipe (80) is arranged side by side with the connecting pipe (30), and one end of the mounting pipe (80) communicating with the shell extends away from the connecting pipe (30), or the valve pipe (10) and the shell are arranged in parallel with each other, or The mounting pipe (80) is fixedly connected with the valve pipe (10) and the shell through welding, or A plug-in structure is arranged between the mounting pipe (80) and the shell, the mounting pipe (80) is plug-in matched with the shell through the plug-in structure, one end of the shell connected with the mounting pipe (80) is provided with an end cover (21), the end cover (21) has a plug-in groove extending into the second valve cavity, and the mounting pipe (80) is plug-in matched with the plug-in groove.

12. The switching valve of claim 10, wherein A filter (90) is arranged between the second valve cavity and the mounting pipe (80), an end surface of one end of the shell connected with the mounting pipe (80) is provided with a connecting hole (22), the second valve cavity communicates with the mounting pipe (80) through the connecting hole (22), and the filter (90) is arranged at the connecting hole (22).

13. A method of machining a main valve, characterized by, The main valve machining method is used for the main valve according to any one of claims 1 to 4, and the main valve machining method comprises: A plurality of assembly holes (11) are machined on a valve pipe (10) of the main valve, and the assembly holes (11) are used to mount connecting pipes (30); A machining tool is inserted into one of the assembly holes (11), and a mounting hole (12) is machined on a side wall of the valve pipe (10), and the mounting hole (12) is used to mount a pilot valve (20); A machining tool is inserted into another assembly hole (11), and a D hole (13) is machined on a side wall of the valve pipe (10), and the D hole (13) is used to mount a connecting pipe (30).

14. The method of claim 13, wherein, The processing tool is a punch (60), and the main valve processing method further comprises: Before stamping the mounting hole (12), a first pre-hole is processed at a position corresponding to one of the assembly holes (11) on the side wall of the valve pipe (10), and the diameter of the first pre-hole is smaller than that of the mounting hole (12); when the mounting hole (12) is processed, the first pre-hole is extruded by the punch (60) to form the mounting hole (12); Before stamping the D-hole (13), a second pre-hole is processed at a position corresponding to another of the assembly holes (11) on the side wall of the valve pipe (10), and the diameter of the second pre-hole is smaller than that of the D-hole (13); when the D-hole (13) is processed, the second pre-hole is extruded by the punch (60) to form the D-hole (13), or, The valve pipe (10) is placed in a bottom die (70), and the bottom die (70) has a first forming hole and a second forming hole; the punch (60) penetrates the first forming hole, and the mounting hole (12) with an outward flange is formed under the action of the punch (60) and the first forming hole; the punch (60) penetrates the second forming hole, and the mounting hole (12) with an outward flange is formed under the action of the punch (60) and the second forming hole.

15. A method of machining a switching valve, characterized by, The switching valve processing method is used for the switching valve according to any one of claims 6 to 12, and the switching valve processing method comprises: A sleeve (50) is arranged between the mounting hole (12) of the main valve and one end of the pilot valve (20), the outer wall of the pilot valve (20) and the inner wall of the sleeve (50) are welded, the outer wall of the sleeve (50) and the inner wall of the mounting hole (12) are welded, or The main valve, the pilot valve (20), the connecting pipe (30) and the capillary tube (40) of the switching valve are made of stainless steel material, and the main valve, the pilot valve (20), the connecting pipe (30) and the capillary tube (40) are installed and furnace-welded together.

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