Filtering piece, silencing assembly and manufacturing method of filtering piece

Abstract

The invention discloses a filtering piece, a silencing assembly and a manufacturing method of the silencing assembly, the filtering piece comprises a filtering net and a net rack, the filtering net comprises a main body part and a connecting part, the filtering net is fixedly connected with the net rack through the connecting part, the main body part comprises a first combination part and a second combination part, the first combination part is located on the peripheral wall part of the main body part, and the second combination part is located on the peripheral wall part of the main body part. The second combination part is located at the end of the side, away from the connecting part, of the body part and connected with the first combination part.

Description

[Technical field]

[0001] The invention relates to the field of refrigeration systems, and in particular to a filter element, a muffler assembly and a method for manufacturing the filter element. [Background technology]

[0002] At present, filters in the refrigeration field are generally formed by stamping metal filter meshes into cones or cylinders. The obtained filter meshes have many wrinkles and large flow resistance. In order to reduce the filtration resistance in some refrigeration processes, the mesh number of the filter mesh cannot be too large. However, the forming performance of low-mesh filter meshes using the stamping process is poor.

[0003] Therefore, it is necessary to improve the above technology. [Summary of the invention]

[0004] The object of the present invention is to provide a filter element which can effectively reduce flow resistance.

[0005] On the one hand, the present invention provides a filter element including a filter screen and a frame, the filter screen including a main body and a connecting part, the filter screen is fixedly connected to the frame through the connecting part, the main body includes a first combining part and a second combining part, the first combining part is located at the peripheral wall part of the main body, the second combining part is located at one side end part of the main body away from the connecting part, and the first combining part is connected to the second combining part.

[0006] The filter element provided by the present invention realizes shaping of the filter net through the first combining part, the second combining part and the mesh frame. Compared with the scheme of shaping the filter net by a shaping process, the filter net has fewer wrinkles, which is beneficial to reducing flow resistance.

[0007] On the other hand, the present invention provides a silencer assembly, which includes a filter element and a shell. The silencer assembly includes a silencer cavity, and the filter element is located in the silencer cavity; the filter element includes a filter screen and a mesh frame, the filter screen includes a main body and a connecting portion, the filter screen is fixedly connected to the mesh frame through the connecting portion, the main body includes a first connecting portion and a second connecting portion, the first connecting portion is located on the peripheral wall surface of the main body, and the second connecting portion is located on one side end of the main body away from the connecting portion, the first connecting portion is connected to the second connecting portion, and the mesh frame is limitedly connected or fixedly connected to the shell.

[0008] The filter screen is arranged in the silencer assembly provided by the present invention, and the refrigerant flowing through the silencer assembly can be filtered, thereby effectively reducing the impurity content in the refrigerant passing through the silencer assembly.

[0009] On the other hand, the present invention provides a method for manufacturing a filter element, comprising the following steps: providing a filter mesh sheet, wherein the filter has two opposite sides along the length direction of the filter mesh sheet, overlapping the two sides of the filter mesh sheet and welding them; closing and welding one end of the filter mesh cylinder; providing a grid frame, and assembling the grid frame and the filter mesh.

[0010] The manufacturing method of the filter element provided by the present invention realizes radial and axial shaping of the filter by welding three sides of a multi-filter mesh sheet twice. Compared with the scheme of shaping the filter mesh by a shaping process, the filter mesh has fewer wrinkles, which is beneficial to reducing flow resistance.

Brief Description of the Drawings

[0011] Figure 1 It is a structural schematic diagram of a filter element provided by the present invention;

[0012] Figure 2 yes Figure 1 A partial cross-sectional enlarged schematic diagram of the filter element shown;

[0013] Figure 3 yes Figure 1 A schematic diagram of the projection of the filter element on the first plane;

[0014] Figure 4 is a schematic projection diagram of the second filter element provided by the present invention on the first plane;

[0015] Figure 5 yes Figure 1 A schematic structural diagram of the filter element from another perspective;

[0016] Figure 6 It is a schematic diagram of the unfolded state of a filter mesh sheet used in a filter element provided by the present invention;

[0017] Figure 7 It is a schematic diagram of the state of a filter screen cylinder used in a filter element provided by the present invention;

[0018] Figure 8 It is a three-dimensional structural schematic diagram of a muffler assembly provided by the present invention;

[0019] Fig. 9 yes Figure 8 A schematic cross-sectional view of a muffler assembly is shown;

[0020] Fig.10 It is a cross-sectional schematic diagram of a second silencer assembly provided by the present invention.

[0021] Figure markings: 100-silencer assembly, 1-filter element, 11-filter net, 111-connecting part, 1121-second combining part, 11213-third side, 11214-fourth side, 113-main body, 1131-first combining part, 11311-first side, 11312-second side, 12-grid, 121-groove part; 122-narrowing part; 2-shell, 21-inlet part, 22-outlet part, 23-first limiting part, 24-second limiting part; 3-connecting pipe, 31-first interface part, 13-silencer chamber. [Specific implementation method]

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The directional words such as upper and lower involved in this article are defined by the positions of the parts shown in the drawings relative to each other, just for the clarity and convenience of expressing the technical solution. It should be understood that the directional words used in this article should not limit the scope of protection requested by this application.

[0024] Please see Figure 1 to Figure 5 A filter element is used in a refrigeration system. The filter element 1 includes a filter screen 11 and a frame 12. The filter screen 1 includes a main body 113 and a connecting portion 111. The filter screen 1 is fixedly connected to the frame 12 through the connecting portion 111. The main body 113 includes a first combining portion 1131 and a second combining portion 1121. The first combining portion 1131 is located on the peripheral wall of the main body 113, and the second combining portion 1121 is located on one side end of the main body 113 away from the connecting portion 111. The first combining portion 1131 is connected to the second combining portion 1121.

[0025] Filters can be used to filter refrigerants in refrigeration pipelines, such as those installed in mufflers, filters, expansion valves and other pipelines. Filters include filter meshes. Currently, filter meshes in refrigeration pipelines are mostly cylindrical filter meshes with a circular tail section, or conical filter meshes with a dotted bottom section. These filter meshes are formed into cylindrical or conical shapes through shaping. Filter meshes prepared by stamping technology have to overcome their own deformation force due to the large deformation force required for shaping. If the length of the filter mesh required by the product is long, but the diameter of the pipe section at the installation location is small, it is difficult to prepare it by stamping technology and the molding is poor.

[0026] The present application provides a filter element, such as Figure 1 The main body 113 includes a first combining portion 1131 and a second combining portion 1121. The first combining portion 1131 is located on the peripheral wall of the main body 113, and the second combining portion 1121 is located on one side end of the main body 113 away from the connecting portion 111. The first combining portion 1131 is connected to the second combining portion 1121. The axial shaping of the filter screen 11 is achieved by setting the first combining portion 1131, and the radial shaping of the filter screen 11 is achieved by the second combining portion 1121. The problem of poor shaping of the filter screen can be effectively solved, and when the filter screen has a small mesh number and a large rigidity, good shaping of the filter screen can also be achieved.

[0027] Further, such as Figure 3 , define the plane where the end surface of the grid 12 away from the filter 11 is located as the first plane P1, the projection of the second connecting portion 1121 on the first plane P1 is a strip, specifically, the projection of the second connecting portion 1121 falls within the projection of the grid 12 on the first plane P1; further, in some embodiments, the midline of the projection of the second connecting portion 1121 coincides with the midline of the projection of the grid 12, the angle formed by the extension direction of the second connecting portion 1121 and the first plane P1 is an acute angle, one end of the first connecting portion 1131 is connected to the second connecting portion 1121, and the other end is connected to the connecting portion 111; of course, as Figure 4 In some other embodiments, the midline of the projection of the second connecting portion 1121 does not coincide with the midline of the projection of the grid 12 .

[0028] like Figure 6 , is a schematic diagram of the expansion of the filter net provided by an embodiment of the present application. The expanded state of the filter net is similar to the side expansion view of a truncated cone. The two straight sides of the expanded view of the filter net are defined as the first side 11311 and the second side 11312, respectively. The axial direction of the filter net is defined as the length direction of the expanded view, and the width direction is perpendicular to the length direction. In this way, the first combining portion 1131 includes the first side 11311 and the second side 11312. The first side 11311 and the second side 11312 are respectively located on both sides of the width direction of the expanded state of the filter net 11. The inner wall of the first side 11311 and the outer wall of the second side 11312 are welded and connected. It can be understood that the inner wall portion of the first side 11311 and the outer wall portion of the second side 11312 cooperate with each other, and the first side 11311 and the second side 11312 are welded and connected, and the two axial sides of the filter net 11 are shaped by the first combining portion.

[0029] Please see Figure 7 , is the state of the filter cylinder after the first joint portion 1131 is welded to the filter provided in this embodiment, the second joint portion 1121 includes a third side portion 11213 and a fourth side portion 11214, the third side portion 11213 and the fourth side portion 11214 are arranged opposite to each other, or it can be said that the third side portion 11213 and the fourth side portion 11214 are respectively located on both sides of the extension direction of the second joint portion 1121, the third side portion 11213 is connected to the first joint portion 1131, the inner wall of the third side portion 11213 and the inner wall of the fourth side portion 11214 are welded, or it can be said that the inner wall portion of the third side portion 11213 and the inner wall portion of the fourth side portion 11214 match, the third side portion 11213 and the fourth side portion 11214 are welded, and one end portion of the filter 11 is shaped by the second joint portion. During the manufacturing process of the filter screen 11 with the above structure, the filter screen 11 has a smaller deformation force to overcome itself, is less difficult to shape, produces fewer wrinkles, and has smoother filter lines, which is beneficial to reducing the flow resistance of the refrigerant.

[0030] Furthermore, the filtration area is related to the diameter and length of the filter. When the required filtration area is constant, when the filter element needs to be set in a narrow pipe diameter position, the filtration length needs to be longer. For the filter screen made by the shaping process, it is difficult to shape it, and the filtration line is not smooth enough. In comparison, the filter screen of this embodiment can be made longer more easily with a smaller diameter, and has a relatively smooth filtration line, which is conducive to improving the filtration effect. Furthermore, the ratio of the diameter of the first end of the filter screen to the length of the filter screen is not greater than 1:2, for example, the diameter of the first end of the filter screen is 20mm, and the length of the filter screen is 50mm.

[0031] Furthermore, the filter provided in this embodiment can be made of a steel material with a harder texture and a larger mesh. Such a filter has a better shaping effect and can eliminate the need for a bracket for strengthening the shaping effect of the main body of the filter, which can relatively reduce costs and simplify the structure, such as using 304 stainless steel.

[0032] Further, the grid 12 includes a groove portion 121, which extends along the circumference of the grid 12, and the first end portion 111 is at least partially located in the groove portion 121, and the wall portion of the first end portion 111 and the groove wall of the groove portion 121 are closely arranged; further, the first combining portion 1131 can penetrate the entire main body portion 113 in the axial direction, and one end of the first combining portion 1131 is located in the groove portion 121; or, the first combining portion 1131 does not penetrate the main body portion 113, and the first combining portion 1131 stops at a position close to the connecting portion 111, leaving a part without welding, and fixing it with the grid, mainly considering that the connecting portion 111 is finalized after welding, and the connecting portion 111 may be difficult to combine with the grid 12. In some embodiments, by not welding the end portions of one side of the first side portion 11311 and the second side portion 11312, the formed connecting portion 111 has a notch, which is conducive to reducing the difficulty of inserting the connecting portion 111 into the groove portion 121, effectively reducing the difficulty of matching.

[0033] Furthermore, the mesh frame 12 further includes a necking portion 122 (not shown), which is disposed on the outer wall of the groove portion 121. By providing the necking portion 122, one end of the filter 11 is clamped in the mesh frame 12, reducing the risk of the filter 11 being detached from the mesh frame 11 during use.

[0034] like Figure 8 to Figure 10The present application also provides a muffler assembly, the muffler assembly 100 includes a filter element 1 and a housing 2, the muffler assembly 100 includes a muffler chamber 3, the filter element 1 is located in the muffler chamber 3; the filter element 1 includes a filter screen 11 and a grid frame 12, the filter screen 1 includes a main body 113 and a connecting portion 111, the filter screen 1 is fixedly connected to the grid frame 12 through the connecting portion 111, the main body 113 includes a first connecting portion 1131 and a second connecting portion 1121, the first connecting portion 1131 is located around the main body 113 The second joint portion 1121 is located at one end of the main body 113 away from the connecting portion 111, and the first joint portion 1131 is connected to the second joint portion 1121; the shell 2 includes an inlet portion 21 and an outlet portion 22, and the inlet portion 21 and the outlet portion 22 are respectively located at two ends of the shell 2, and the grid 12 is arranged relatively close to the inlet portion 21; the shell 2 also includes a limiting portion, and the limiting portion is located at the wall portion between the inlet portion 21 and the outlet portion 22, and the filter element 1 and the shell 2 are fixed by the grid 12 and the limiting portion.

[0035] The silencer assembly provided in this embodiment is internally provided with a filter element with relatively smooth lines, and the filter element is fixed in the shell by a limiting portion, and can filter the refrigerant passing through the silencer shell. At the same time, the filter element 1 also plays the role of a sound-absorbing lining, absorbing part of the noise and improving the filtering and silencer effects.

[0036] There are many possible matching structures between the housing 2 and the filter element. Fig. 9 , is the second matching mode, the limiting part includes a first limiting part 23 and a second limiting part 24, the first limiting part 23 and the second limiting part 24 are arranged near the inlet 21, the second limiting part 24 is closer to the inlet 21 than the first limiting part 23, one end of the grid 12 abuts against the second limiting part 24, and the other end of the grid 12 abuts against the first limiting part 23. Fig.10 , which is the first matching method, the limiting portion includes a first limiting portion 23, the first limiting portion 23 is arranged close to the inlet portion 21, the shell 2 includes a necking section, the necking section is connected to the inlet portion 21, one end of the grid 12 abuts against the end of the necking section away from the inlet portion 21, and the other end of the grid 12 abuts against the first limiting portion 23; through the above methods, the filter element can be relatively firmly fixed in the shell, and no welding method is used, which is beneficial to reduce impurities and improve the filtering effect.

[0037] Furthermore, the silencer assembly 100 also includes a connecting pipe 3, which is an integral part. The connecting pipe 3 includes a first interface portion 31. The shell 2 includes an inlet portion 21. The inlet portion 21 is located at one end of the shell 2. The shell 2 and the connecting pipe 3 are welded and connected at the wall of the matching part of the inlet portion 21 and the first interface portion 31. For example, the connecting pipe can be an injection pipe or an exhaust pipe. For example, the silencer assembly is installed at the rear end of the solenoid valve, and the connecting pipe 3 is an injection pipe. The air flow pulsation generated by the opening of the solenoid valve is buffered by the injection pipe and then enters the shell 2. The shell 2 is provided with a filter 1. The filter 1 has a smooth line structure, can filter the air flow, reduce noise, and play a role in filtering and silencing.

[0038] A method for manufacturing a filter element is described below, comprising the following steps:

[0039] Providing a filter screen sheet, wherein the filter screen has two opposite sides along the width direction of the filter screen sheet, and the two sides of the filter screen sheet are overlapped and welded;

[0040] Weld one end of the filter cylinder;

[0041] A mesh frame is provided, and the mesh frame and the filter are assembled.

[0042] Specifically, the filter mesh sheet is cut into the shape of an unfolded truncated cone side wall, and the "width direction of the filter mesh sheet" refers to the arrangement direction of the two straight edges; the two straight edges are respectively defined as a first edge 11311 and a second edge 11312, and the first edge 11311 and the second edge 11312 are stacked and welded by a welding head. Specifically, the welding equipment includes a welding shaft, and the filter mesh sheet surrounds the welding shaft. The upper and lower sides of the stacked first edge 11311 and the second edge 11312 respectively contact the welding head and the welding shaft, and are welded to form a first joint 1131.

[0043] One end of the filter barrel formed by one welding is closed by welding. Specifically, the filter barrel after one welding is pushed out of the welding shaft, and one end of the welding barrel is flattened and welded to form a second joint portion 1121.

[0044] Assemble the grid and the filter net, specifically, define the other end of the filter net 11 opposite to the second connecting portion 1121 as the connecting portion 111, and the connecting portion 111 and the grid 12 are fixedly connected or limit-connected; further, the grid 12 includes a groove portion 121, and the groove portion 121 is arranged along the circumference of the grid 12, and at least a portion of the connecting portion 111 is inserted into the groove portion 121, and a necking portion 122 is formed at the junction of the grid 12 and the connecting portion 111 by rolling or other processing methods, thereby realizing the fixed connection between the filter net 11 and the grid 12.

[0045] The manufacturing method of the filter element provided in this embodiment has a filter screen disposed inside, and the filter screen is shaped axially and radially by welding. Compared with the scheme of shaping the filter screen by a shaping process, the shaping difficulty is lower, which is conducive to obtaining a smoother filtering line. Furthermore, the housing and the filter element can be made of steel material, which is conducive to reducing weight and cost.

[0046] Furthermore, the manufacturing steps of the filter element also include the following steps: providing a metal sheet or a metal tube, punching the metal sheet or the metal tube to form a groove portion 121; assembling the filter screen 11 and the grid frame 12, inserting the unwelded end of the filter screen into the groove portion 121 of the grid frame 12, and clamping the fitting position.

[0047] Furthermore, the manufacturing process of the filter element also includes the following steps: performing continuous spot welding or roll welding on the parts of the filter to be welded. Continuous spot welding or roll welding may not use solder, which reduces the impact of solder impurities on the filter, and is not prone to leaking during the welding process, which is beneficial to improving the molding quality of the filter. For example, electric current or laser can be used for continuous spot welding to reduce spatter during the welding process.

[0048] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail in this specification with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A filter element, used in a refrigeration system, characterized in that: The filter element (1) comprises a filter net (11) and a mesh frame (12); the filter net (11) comprises a main body (113) and a connecting portion (111); the filter net (11) is fixedly connected to the mesh frame (12) via the connecting portion (111); The main body (113) includes a first combining portion (1131) and a second combining portion (1121), wherein the first combining portion (1131) is located on the peripheral wall portion of the main body (113), and the second combining portion (1121) is located on one side end portion of the main body (113) away from the connecting portion (111), and the first combining portion (1131) is connected to the second combining portion (1121).

2. The filter element according to claim 1, characterized in that The plane where the end face of the grid (12) away from the filter (11) is located is defined as the first plane (P1), the projection of the second connecting portion 1121 on the first plane P1 falls within the projection of the grid 12 on the first plane P1, and one end of the first connecting portion (1131) is connected to the second connecting portion (1121), and the other end is connected to the connecting portion (111).

3. The filter element according to claim 2, characterized in that: The angle formed by the extension direction of the second combining portion (1121) and the first plane (P1) is an acute angle, and the midline of the projection of the second combining portion (1121) coincides with the midline of the projection of the grid (12).

4. The filter element according to any one of claims 1 to 3, characterized in that: The first connecting portion (1131) comprises a first side portion (11311) and a second side portion (11312), wherein the first side portion (11311) and the second side portion (11312) are respectively located on both sides of the width direction of the filter net (11) in the unfolded state, and the inner wall of the first side portion (11311) and the outer wall of the second side portion (11312) are welded to each other.

5. The filter element according to claim 4, characterized in that The second combining portion (1121) includes a third side portion (11213) and a fourth side portion (11214), the third side portion (11213) and the fourth side portion (11214) are arranged opposite to each other, the third side portion (11213) is connected to the first combining portion (1131), and the inner wall of the third side portion (11213) and the inner wall of the fourth side portion (11214) are welded together.

6. The filter element according to claim 4, characterized in that: The grid (12) comprises a groove portion (121), wherein the groove portion (121) extends along the circumference of the grid (12), and the connecting portion ( 111) is at least partially located in the groove portion (121) In the connecting portion (111), the wall and The concave The groove wall of the groove portion (121) is arranged closely, and part of the first one Joint (1131) is located in A groove portion (121).

7. A silencer assembly, characterized in that: The silencer assembly (100) comprises a filter element (1) and a housing (2), the silencer assembly comprises a silencer chamber (3), and the filter element (1) is located in the silencer chamber (3); The filter element (1) comprises a filter net (11) and a mesh frame (12); the filter net (11) comprises a main body (113) and a connecting portion (111); the filter net (11) is fixedly connected to the mesh frame (12) via the connecting portion (111); the main body (113) comprises a first connecting portion (1131) and a second connecting portion (1121); the first connecting portion (1131) is located on a peripheral wall surface of the main body (113); the second connecting portion (1121) is located on a side end portion of the main body (113) away from the connecting portion (111); the first connecting portion (1131) is connected to the second connecting portion (1121); The grid frame (12) is position-limitingly connected or fixedly connected to the shell (2).

8. The sound-absorbing assembly according to claim 7, characterized in that: The housing (2) comprises an inlet portion (21), and the mesh frame (12) is closer to the inlet portion (21) than the filter screen (11); The shell (2) comprises a first limiting portion (23) and a second limiting portion (24); the first limiting portion (23) and the second limiting portion (24) protrude from the inner wall surface of the shell (2); along the axial direction of the shell (2), the grid (12) is limited between the first limiting portion (23) and the second limiting portion (24).

9. A method for manufacturing a filter element, characterized in that: The filter element comprises a filter screen and a mesh frame, and the manufacturing method of the filter element comprises the following steps: Providing a filter screen sheet, wherein the filter screen has two opposite sides along the width direction of the filter screen sheet, and the two sides of the filter screen sheet are overlapped and welded; Weld one end of the filter cylinder; A mesh frame is provided, and the mesh frame and the filter are assembled.

10. The method for manufacturing a filter element according to claim 9, characterized in that: The steps include: Providing a metal sheet or a metal tube, and punching the metal sheet or the metal tube to form a groove portion; Place The opening end of the filter is inserted into the groove, and the groove and at least part of the filter are spun. Joint.

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