Liquid storage device, filter assembly and method of manufacturing same

Abstract

A liquid storage device (200), a filter assembly (100) and a manufacturing method thereof. The filter assembly (100) includes a filtration layer (10), a filter stand (20) and a connection member (30), one side of the connection member (30) is attached to the filter stand (20) and the other side extends from the bottom of the filtration layer (10) to the outer edge of the filtration layer (10) and is pressed against the filtration layer (10) by being folded, and the connection member (30) is fixedly connected to the filter stand (20) by welding.

Description

[Technical Field]

[0001] Related Applications This application claims priority to a Chinese patent application filed on September 7, 2021, bearing application number 202111043187.X and entitled "Method for manufacturing a filter assembly and a filter assembly," and a Chinese patent application filed on September 7, 2021, bearing application number 202122153966.7 and entitled "Filter assembly and liquid storage device," the entire contents of which are incorporated herein by reference.

[0002] FIELD OF THE INVENTION This application relates to the technical field of cooling systems, and more particularly to reservoirs, filter assemblies and methods of manufacturing the same. [Background technology]

[0003] The liquid storage device is connected to the liquid inlet of the compressor and is an important component of the cooling system. The liquid storage device consists of components such as a cylinder, an intake pipe, an exhaust pipe, and a filter assembly, and performs functions such as storage, filtering, and buffering. Among them, filtering and / or buffering are usually achieved by the filter assembly.

[0004] However, in the filter assemblies of the related art, the filtration layer is attached by either directly welding the filtration layer to the filter frame and then fixing the filter assembly inside the cylindrical body of the liquid storage device, or by directly welding the filtration layer to the cylindrical body of the liquid storage device. This method has problems such as the mesh of the filtration layer dissolving and falling off, and the welding slag falling off, which can cause problems such as noise and clogging in the liquid storage device, and ultimately lead to foreign matter entering the compressor, which can easily damage the compressor cylinder and even cause the compressor to freeze. Furthermore, the filtration layer has a large weld gap after welding, which weakens the bond between the welded filtration layer and the filter frame after welding and makes it more likely to fall off due to collision or corrosion by fluid, reducing the filtration effect of the liquid storage device and ultimately preventing it from operating normally. Summary of the Invention

[0005] According to various embodiments of the present application, a reservoir device, a filter assembly, and a method for manufacturing the same are provided.

[0006] The present application provides a filter assembly including a filtration layer, a filter support, and a connecting member, one side of the connecting member being provided on the filter support, the other side extending from the bottom of the filtration layer to the outer edge of the filtration layer and pressed against the filtration layer by being bent, and the connecting member being fixedly connected to the filter support by welding.

[0007] In one embodiment, the connecting member includes an annular body and a folded portion fixed to each other, the annular body being pressed against the filter frame and extending from the bottom of the filtration layer to the outer edge of the filtration layer, and the folded portion being connected to the outer edge of the annular body and folded toward the filtration layer and pressed against the filtration layer.

[0008] A space is formed between the annular body and the fold to accommodate the edge of the filtration layer, and the fold is pressed firmly against the side of the filtration layer away from the filter frame.

[0009] In one embodiment, the filter mount includes a connection portion fixedly connected to the connection member, the connection portion having a protrusion facing the filtering layer, and the connection portion being fixed to the connection member by resistance welding via the protrusion.

[0010] In one embodiment, the number of the protrusions is plural, and the plural protrusions are arranged at equal intervals along the circumferential direction of the connection portion.

[0011] In one embodiment, the filter mount further includes a flow guide portion protruding toward the filtration layer, the flow guide portion facing the filtration layer and capable of diverting fluid from the filtration layer, and the connection portion being arranged around the circumferential direction of the flow guide portion.

[0012] In one embodiment, a base portion is provided between the connection portion and the flow guide portion, and a plurality of flow reduction holes are drilled in the base portion, and the plurality of flow reduction holes are evenly arranged along the circumferential direction of the flow guide portion.

[0013] In one embodiment, the base portion is recessed in a direction away from the filtration layer to form a guide groove, and the flow rate reduction hole communicates with the guide groove.

[0014] In one embodiment, the wall surface of the guide groove is formed into an arcuate surface.

[0015] In one embodiment, the filtration layer includes a first filter and a second filter disposed in a stack, and an edge of the first filter and an edge of the second filter are disposed within the connecting member.

[0016] The present application further provides a liquid storage device comprising a cylinder, an intake pipe, an exhaust pipe and the filter assembly according to any one of the preceding claims, wherein the filter assembly is fixedly connected to the cylinder via a filter mount.

[0017] The present application further provides a method for manufacturing a filter assembly, including bending a connecting member to form a space for accommodating an edge of a filtration layer with the connecting member, pressing the connecting member to hem the edge of the filtration layer, and fixedly connecting the connecting member to a filter frame by crimping.

[0018] In one embodiment, the step of bending the connecting member to form a space for accommodating the edge of the filtration layer with the connecting member includes bending an outer edge of the connecting member along the axial direction of the connecting member to form a space for accommodating the edge of the filtration layer with the connecting member.

[0019] In one embodiment, the step after folding the outer edge of the connecting member along the axial direction of the connecting member to form a space for accommodating the edge of the filtration layer with the connecting member includes placing the edge of the filtration layer onto the unfolded portion of the connecting member, and folding the folded portion of the connecting member toward the axial direction of the connecting member to form a folded portion against which the edge of the filtration layer can be pressed and fixed.

[0020] In one embodiment, the step of fixedly connecting the connection member to the filter cradle by crimping includes fixedly connecting the connection member to the filter cradle by resistance welding.

[0021] In one embodiment, the step of bending the connecting member to form a space for accommodating the edge of the filtration layer includes bending an outer edge of the connecting member to form an acute angle between the bent portion and the un-bent portion of the connecting member to form the space for accommodating the edge of the filtration layer.

[0022] In one embodiment, the step of pressing the connecting member to hem the edge of the filtration layer includes placing the edge of the filtration layer onto the unfolded portion of the connecting member, and folding the folded portion of the connecting member toward the axial direction of the connecting member using a resistance welding electrode to form a folded portion against which the edge of the filtration layer can be pressed and fixed.

[0023] In one embodiment, after the step of pressing the connecting member to hem the edge of the filtration layer, the method further includes abutting one electrode for resistance welding against the folded portion and the other electrode against the filter frame, and applying pressure to the folded portion and the filter frame with both electrodes to pass current through them.

[0024] In one embodiment, before the step of fixedly connecting the connection member to the filter frame by pressure welding, the method further includes forming a protrusion on the filter frame by a punching process that protrudes toward the connection member, and applying pressure to the folded portion and the protrusion by an electrode.

[0025] The details of one or more embodiments of the application are set forth in the drawings and description below. Other features, objects, and advantages of the application will become apparent from the description, drawings, and claims. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a schematic diagram of a filter assembly according to one or more embodiments. [Figure 2] FIG. 2 is a cross-sectional view of the filter assembly shown in FIG. [Figure 3] FIG. 3 is an enlarged view of a portion A of the filter assembly shown in FIG. 2. [Figure 4] 2 is a schematic diagram of the filter assembly shown in FIG. 1 from another perspective. FIG. [Figure 5] 1 is a cross-sectional schematic view of an impoundment device according to one or more embodiments. FIG. [Figure 6] 1 is a flowchart of a method for manufacturing a filter assembly according to one or more embodiments.

[0027] Explanation of symbols 100 filter assembly, 10 filtration layer, 11 first filter, 12 second filter, 20 filter support, 21 connection portion, 22 protrusion, 23 flow guide portion, 24 support portion, 241 flow rate reduction hole, 242 guide groove, 30 connection member, 31 annular body / unbent portion, 32 folded portion / bent portion, 33 space, 200 liquid storage device, 201 cylindrical body, 202 intake pipe, 203 exhaust pipe.

[0028] The present application will be described in more detail in combination with the above explanation of the main symbols, drawings, and specific embodiments. DETAILED DESCRIPTION OF THE INVENTION

[0029] In order to make the objectives, technical aspects and advantages of the present application clearer, the present application will be described in more detail below with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for interpreting the present application and do not limit the protection scope of the present application.

[0030] It should be understood that when an assembly is referred to as being "attached" to another assembly, it may be directly attached to the other assembly, or there may be an intervening assembly. When an assembly is referred to as being "mounted" to another assembly, it may be directly mounted to the other assembly, or there may also be an intervening assembly. When an assembly is referred to as being "secured" to another assembly, it may be directly secured to the other assembly, or there may also be an intervening assembly. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this application are for descriptive purposes only and do not represent the only embodiments.

[0031] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "or / and" as used in this application includes one or more of any and all combinations of the associated listed items.

[0032] The present application provides a filter assembly 100 that is used within a liquid reservoir device 200 and performs excellent fluid filtering and buffering, as well as gas-liquid separation.

[0033] Referring to Figures 1 to 5, Figure 1 is a schematic diagram of the configuration of a filter assembly 100 in one or more embodiments of the present application, Figure 2 is a schematic cross-sectional view of the filter assembly shown in Figure 1, Figure 3 is an enlarged partial view of A of the filter assembly 100 shown in Figure 2, Figure 4 is a schematic diagram of the configuration of the filter assembly 100 shown in Figure 1 from another perspective, and Figure 5 is a schematic cross-sectional view of a liquid storage device 200 to which the filter assembly 100 is attached in one or more embodiments of the present application.

[0034] As shown in FIG. 1 , filter assembly 100 includes a filtration layer 10, a filter frame 20, and a connecting member 30. The filtration layer 10 is used to filter fluid, the filter frame 20 is used to secure the filtration layer 10, and the connecting member 30 is used to hemming the filtration layer 10 and securely connect it to the filter frame 20. The connecting member 30 hems and presses the filtration layer 10, thereby preventing the mesh of the filtration layer 10 from dissolving and falling off, and preventing the welding slag from falling off during welding. In some embodiments, the filter frame 20 is fixed to the connecting member 30 by welding. In other embodiments, the filter frame 20 may be fixed to the connecting member 30 by other connection methods, such as crimping.

[0035] The filtration layer 10 has a substantially hemispherical filter structure. The filtration layer 10 is used to filter a fluid, and the hemispherical filter structure can increase the effective filtration area through which the fluid flows.

[0036] It will be appreciated that in other embodiments, the filtration layer 10 may have other configurations, such as a tapered configuration, that still perform the function of filtering fluid.

[0037] In one embodiment, the filtration layer 10 includes a first filter 11 and a second filter 12 that are stacked. The first filter 11 and the second filter 12 are matched in structure, and the edges of the first filter 11 and the second filter 12 are hemmed and fixed by a connecting member 30. The meshes of the first filter 11 and the second filter 12 are arranged in a staggered pattern and are in close contact with each other. This arrangement can improve the filtering effect of the filtration layer 10 on the fluid. In other embodiments, the filtration layer 10 may be provided in a multi-layer filter structure, such as a three-layer or four-layer structure, to improve the filtering effect of the filtration layer 10 on the fluid.

[0038] In other embodiments, the first filter 11 and the second filter 12 may have other structures, such as tapered structures, and the structures of the two filters do not need to match, as long as they can filter the fluid. It goes without saying that the first filter 11 and the second filter 12 do not necessarily need to have staggered meshes and / or be tightly packed together.

[0039] In one embodiment, the first filter 11 and the second filter 12 are the same type of metal filter, such as a stainless steel mesh, etc. By doing so, the strength of the first filter 11 and the second filter 12 can be ensured.

[0040] 2 and 3, the filter frame 20 includes a connecting portion 21. The connecting portion 21 has a substantially L-shaped cross section and is used to connect the filter layer 10 to the liquid storage device 200. The connecting portion 21 is used to connect to the connecting member 30 and can be easily fixedly connected to the connecting member 30 by resistance welding, which eliminates the need for welding materials and filler metal and prevents welding slag from falling off during use. At the same time, the welding cost is low, production efficiency is high, and it is suitable for mass production.

[0041] In other embodiments, the connection portion 21 and the connection member 30 may be pressure-welded and fixed by forging welding, contact welding, friction welding, air pressure welding, cold pressing, etc., and it is understood that it is sufficient to realize welding and fixing to the connection member 30. The connection portion 21 may be fixed by other methods, such as adhesive bonding, caulking, brazing, etc. Fixed connection by Any other suitable method may be used as long as it can realize a fixed connection between the connection portion 21 and the connection member 30.

[0042] 2 and 3, the connecting portion 21 has a protrusion 22 facing the filtration layer 10. The connecting portion 21 is press-fitted to the connecting member 30 via the protrusion 22. The protrusion 22 is provided on the side of the connecting portion 21 facing the connecting member 30 and protrudes toward the connecting member 30. Because the protrusion 22 can abut against the connecting member 30 before welding, a certain gap is created between the connecting portion 21 and the connecting member 30, and bump contact is made before the filter frame 20 and the connecting member 30 are press-fitted. This increases the electrode pressure and welding current at the bump contact position, which is advantageous for heat concentration during welding. This makes it easier to weld the connecting portion 21 and the connecting member 30 and improves welding quality, thereby improving production efficiency and reducing the possibility of joint deformation.

[0043] Alternatively, the number of protrusions 22 may be multiple, and the multiple protrusions 22 may be arranged at equal intervals along the circumferential direction of the connection portion 21. The protrusions 22 are generally hemispherical, which improves the concentration of current during welding and is advantageous for heat concentration during pressure welding. This can improve the connection strength between the connection portion 21 and the filtration layer 10.

[0044] It is understood that in other embodiments, the protrusions 22 may have other shapes, and the number and installation positions of the protrusions 22 may be provided according to actual needs.

[0045] Alternatively, the number of protrusions 22 may be eight. The eight protrusions 22 are evenly arranged along the circumferential direction of the connection portion 21. Alternatively, the gap between the connection portion 21 and the connection member 30 before welding may be 0.5 cm. This not only improves production efficiency but also increases the joining strength at the welded portion.

[0046] In one embodiment, the connecting portion 21 includes an annular top surface and a side surface surrounding the top surface. The top surface of the connecting portion 21 is used for connection to the connecting member 30, and the side surface of the connecting portion 21 is used for connection to the cylindrical body 201 of the liquid storage device 200. The protrusion 22 is provided on the top surface of the connecting portion 21 on the side facing the filtration layer 10. One end of the side surface of the connecting portion 21 away from the filtration layer 10 is chamfered and shrunk inward in the radial direction, making it easy to attach and detach the filter mount 20 and the cylindrical body 201 of the liquid storage device 200.

[0047] In one embodiment, the side of the connecting portion 21 away from the top surface shrinks in the radial direction to form a constant taper. Furthermore, the maximum inner diameter of the side of the connecting portion 21 matches the inner diameter of the cylindrical body 201 of the liquid storage device 200. That is, the connecting portion 21 fits snugly inside the cylindrical body 201 of the liquid storage device 200, and the tapered side of the connecting portion 21 is firmly engaged with the inner wall of the cylindrical body 201 of the liquid storage device 200, making the installation method simple.

[0048] In one embodiment, the filter mount 20 further includes a flow guide portion 23. The flow guide portion 23 has a substantially dome-shaped structure and protrudes toward the filtration layer 10. The flow guide portion 23 can divide the flow of the fluid, and is provided at an intermediate position on the top surface of the filter mount 20, protruding toward the filtration layer 10. Most of the fluid that has passed through the filtering passes through the flow guide portion 23 and flows in all directions along the surface of the flow guide portion 23, thereby realizing the division of the fluid and the role of buffering the fluid.

[0049] In other embodiments, the flow guide portion 23 may have other structures, for example, a flow guide portion 23 having an elliptical cross section, as long as it can perform the role of dividing and buffering the fluid.

[0050] In one embodiment, as shown in FIGS. 2 and 4 , a base portion 24 is provided between the connection portion 21 and the flow guiding portion 23. The base portion 24 and the flow guiding portion 23 are provided on the inner edge of the top surface of the connection portion 21. A plurality of flow rate reduction holes 241 are drilled in the base portion 24, and the plurality of flow rate reduction holes 241 are evenly arranged along the circumferential direction of the flow guiding portion 23. The flow rate reduction holes 241 are approximately circular holes. The flow rate reduction holes 241 are used to reduce the flow rate of the fluid after filtering. The flow rate reduction holes 241 are drilled in the top surface of the filter base 20 and between the flow guiding portion 23 and the connection portion 21, which can prevent a large amount of fluid from directly colliding with the cylindrical body 201 of the liquid storage device 200.

[0051] Alternatively, the number of flow rate reduction holes 241 may be eight, which provides a good flow rate reduction effect on the fluid.

[0052] Furthermore, the frame portion 24 is recessed in a direction away from the filtration layer 10 to form a guide groove 242. The flow rate reduction hole 241 communicates with the guide groove 242. The guide groove 242 has a generally arc-shaped groove structure. The guide groove 242 is used to guide the flow of fluid after filtration by the filtration layer 10. The filtered fluid passes through the wall surface of the guide groove 242, flows into the flow rate reduction hole 241, and then enters the exhaust pipe of the liquid storage device 200. This not only prevents the fluid from directly flowing into the exhaust pipe, but also effectively prevents the fluid from colliding with the inner wall of the liquid storage device 200.

[0053] It will be appreciated that in other embodiments, the guide groove 242 may have other structures, such as a rectangular groove, as long as it is capable of guiding fluid.

[0054] In one embodiment, the filter frame 20 can be formed by stamping a metal plate, thereby reducing material consumption and improving production efficiency. At the same time, the processed filter frame 20 has high strength and rigidity, making it less likely to deform when hit by a fluid.

[0055] Alternatively, the material of the filter holder 20 may be a highly corrosion-resistant material such as stainless steel or aluminum alloy, which can avoid corrosion caused by fluids during use and effectively extend the service life of the filter holder 20.

[0056] In other embodiments, it will be appreciated that the filter cradle 20 may be formed by other processing methods, such as casting, as long as the filter cradle 20 can be easily processed.

[0057] However, in the filter assemblies of the related art, the filtration layer is attached by directly welding the filtration layer to the filter frame and then fixing the filter assembly inside the cylinder of the liquid storage device, which can lead to problems such as the mesh of the filtration layer dissolving and falling off, and the welding slag falling off, causing problems such as noise and clogging in the liquid storage device, and ultimately allowing foreign matter to get inside the compressor, making the compressor cylinder more susceptible to damage and even causing the compressor to freeze. Furthermore, the filtration layer has a large weld gap created by welding after attachment, which weakens the bond between the filtration layer and the filter frame after welding and makes it more susceptible to falling off due to collision or corrosion by fluid, reducing the filtration effect of the liquid storage device and ultimately preventing it from operating normally.

[0058] To solve the above problems, the present application hems the filter layer 10 using the connecting member 30, forming a space 33 that accommodates the edge of the filter layer 10, thereby achieving hemming and pressing against the filter layer 10. The bent connecting member 30 is then fixed to the filter frame 20 by resistance welding. This not only reduces the welding gap between the connecting member 30 and the filter frame 20, preventing the mesh of the filter layer 10 from dissolving and falling off and the welding slag from falling off during welding, but also increases the bonding strength between them after welding, thereby improving the connection reliability of the filter assembly 100.

[0059] The connecting member 30 has a substantially annular structure. One side of the connecting member 30 is attached to the filter frame 20, and the other side extends from the bottom of the filtration layer 10 to the outer edge of the filtration layer 10 and is bent to be pressed against the filtration layer 10. Specifically, the other side of the connecting member 30 extends from the bottom of the filtration layer 10 to the outer edge of the filtration layer 10 and is bent to a certain extent to be pressed and abut against the filtration layer 10. The connecting member 30 and the filter frame 20 are fixedly connected by pressure welding. The connecting member 30 is used to press and weld the filtration layer 10 to the filter frame 20. One end of the connecting member 30 abuts against the filtration layer 10, and by bending the connecting member 30, a space 33 capable of accommodating the edge of the filtration layer 10 can be formed. The other end of the connecting member 30 is attached to the filter frame 20 and is fixedly connected to the filter frame 20 by resistance welding.

[0060] As shown in FIGS. 2 and 3 , the connecting member 30 includes an annular body 31 and a folding portion 32 that are fixed to each other. The folding portion 32 has a generally annular structure. The annular body 31 is pressed against the filter frame 20 and extends from the bottom of the filtration layer 10 to the outer edge of the filtration layer 10. The folding portion 32 is connected to the outer edge of the annular body 31 and is folded toward the filtration layer 10 and pressed against the filtration layer 10. A space 33 that accommodates the edge of the filtration layer 10 is formed between the annular body 31 and the folding portion 32, and the folding portion 32 is firmly pressed against the side of the filtration layer 10 that is away from the filter frame 20. The annular body 31 is used to connect the filtration layer 10 and the filter frame 20, and the annular body 31 and the folding portion 32 sandwich the outer edge of the filtration layer 10 between them, thereby hemming the outer edge of the filtration layer 10 and pressing the filtration layer 10.

[0061] When attached, the connecting member 30 is bent using a sheet metal process, and the outer edge of the connecting member 30 is bent toward the filtration layer 10 to form a space 33 to accommodate the edge of the filtration layer 10. The edge of the filtration layer 10 is placed on the unbent portion 31 of the connecting member 30, and then the bent portion 32 is folded inward using a sheet metal process to form a folded portion 32 that is pressed against the edge of the filtration layer 10. When the connecting member 30 is placed on the connection portion 21 and resistance-welded, one electrode is abutted against the folded portion 32 and the other electrode is abutted against the connection portion 21 of the filter frame 20, and a force is applied to both electrodes to pass electricity, thereby achieving a fixed connection between the connecting member 30 and the filter frame 20.

[0062] In other embodiments, it is understood that the folding method of the connecting member 30 may be other processing methods, such as punching, as long as it is possible to achieve hemming of the edge of the filtration layer 10.

[0063] In one embodiment, the connecting member 30 can be bent by a sheet metal process to form an acute angle between the bent portion 32 and the unbent portion 31 of the connecting member 30. The connecting member 30 can then be placed on the connecting portion 21 of the filter frame 20, and the edge of the filtration layer 10 can then be placed on the unbent portion 31 of the connecting member 30. During resistance welding, one electrode is abutted against the bent portion 32 of the connecting member 30, and the other electrode is abutted against the connecting portion 21 of the filter frame 20. By applying force to both electrodes, the connecting member 30 can be hemmed and pressed against the filtration layer 10. By continuously applying force to both electrodes and passing electricity, the connecting member 30 and the filter frame 20 can be welded together, which greatly improves the production efficiency of the filter assembly 100.

[0064] In a filter assembly provided in one embodiment of the present application, the connecting member is bent to form a space to accommodate the edge of the filtration layer, thereby achieving hemming and pressing against the filtration layer, and the bent connecting member is then fixed to the filter frame by resistance welding. The small welding gap between the connecting member and the filter frame not only prevents the mesh of the filtration layer from dissolving and falling off, and the welding slag from falling off during welding, but also ensures a strong bonding strength after welding, thereby improving the reliability of the filter assembly.

[0065] The present application further provides a liquid storage device 200 using the filter assembly 100 as described above, which effectively prevents the mesh of the filter layer 10 from dissolving and falling off and the welding slag from falling off, thereby reducing the risk of failure of the liquid storage device 200 and preventing foreign matter from generating noise within the liquid storage device 200 or entering other equipment connected to the liquid storage device 200.

[0066] The liquid storage device 200 includes a cylindrical body 201, an intake pipe 202, an exhaust pipe 203, and the above-mentioned filter assembly 100. The filter assembly 100 is fixedly connected to the cylindrical body 201 via a filter stand 20.

[0067] The method for manufacturing a filter assembly provided by the present application is for manufacturing a filter assembly 100 in a liquid storage device 200, and can prevent the mesh of the filtration layer from dissolving and foreign matter such as welding slag from getting into the liquid storage device 200 during the manufacturing of the filter assembly 100, while improving the connection strength of the filter assembly 100 itself. It goes without saying that this method for manufacturing a filter assembly can also be applied to other devices having a filter and a similar structure, such as purifiers and air cleaners.

[0068] Referring to FIG. 6, FIG. 6 is a flow chart of a method for manufacturing a filter assembly in one embodiment of the present application. filter The method for manufacturing the assembly is Step S10: bending the connecting member to form a space for accommodating the edge of the filtration layer; Step S20: pressing the connecting member to hem the edge of the filtration layer; and step S30 of fixedly connecting the connection member to the filter mount by pressure welding.

[0069] Specifically, a sheet metal process is used to bend the connecting member to form a space for accommodating the edge of the filtration layer with the connecting member, the edge of the filtration layer is placed in the space so that the connecting member can completely hem the edge of the filtration layer, and the connecting member and the filtration layer whose edge is accommodated in the connecting member are fixedly connected to the filter frame by welding.

[0070] It is understood that in other embodiments, the connecting member 30 may be folded by other folding methods, but this is not specifically limited here.

[0071] This method of manufacturing a filter assembly involves hemming and pressing the connecting member against the filtration layer by bending the connecting member, and then fixing the bent connecting member to the filter frame by pressure welding. The filtration layer is pressed against the filter frame by the connecting member, which not only prevents the mesh of the filtration layer from dissolving and falling off, and the welding slag from falling off during welding, but also improves the reliability of the filter assembly due to the strong bonding strength after welding.

[0072] In one embodiment, step S10 of bending the connecting member to form a space for accommodating the edge of the filtration layer with the connecting member includes step S11 of bending the outer edge of the connecting member along the axial direction of the connecting member to form a space for accommodating the edge of the filtration layer with the connecting member.

[0073] Specifically, in the sheet metal processing, the connecting element is placed in a corresponding mold, and then the outer edge of the connecting element is bent along the axial direction of the connecting element, so that the included angle between the bent part and the unbent part is approximately perpendicular, and the edge of the filtering layer can be accommodated in the connecting element. Of course, to improve processing efficiency and processing accuracy, the connecting element can also be directly bent into the above shape using a numerically controlled bending machine.

[0074] In one embodiment, an outer edge of the connection member is bent along the axial direction of the connection member to form a space for accommodating the edge of the filtration layer by the connection member, and then Step S21: placing the edge of the filtration layer on the unfolded portion of the connection member; The method further includes step S22 of folding the bent portion of the connection member in the axial direction of the connection member to form a folded portion that can press and fix the edge of the filtration layer.

[0075] Specifically, the outer edge of the connecting member is hemmed and pressed against the filtration layer, thereby fixing the connecting member and the filtration layer together, which prevents the mesh of the filtration layer from coming into direct contact with the filter frame, thereby avoiding problems such as melting of the mesh due to welding.

[0076] In one embodiment, step S10 of bending the connecting member to form a space for accommodating the edge of the filtration layer includes step S11' of bending an outer edge of the connecting member to form an acute angle between the bent and unbent portions of the connecting member to form a space for accommodating the edge of the filtration layer.

[0077] The bent and unbent portions of the connecting member surround the space for accommodating the filtration layer. The acute angle formed by the connecting member itself allows the connecting member to be pressed directly onto the filtration layer with a work jig or other tool when pressing and hemming the filtration layer with the connecting member in the next step. This facilitates the fixed connection between the connecting member and the filtration layer in the next step.

[0078] For example, when the connecting member and the filter stand are pressure-welded together, the connection between the connecting member and the filter stand becomes easier, and production efficiency is improved, making it suitable for mass production.

[0079] In one embodiment, the step S30 of fixedly connecting the connection member to the filter cradle by crimping includes the step S31 of fixedly connecting the connection member to the filter cradle by resistance welding.

[0080] Specifically, resistance welding does not require welding materials or filler metals, which prevents welding slag from falling off during use, while at the same time reducing welding costs and increasing welding convenience.

[0081] Furthermore, when the bent portion of the connecting member and the non-bent portion are formed at an acute angle, the resistance welding electrode can act directly on the connecting member and the filter frame to weld them, thereby eliminating the pressing step and improving production efficiency.

[0082] In one embodiment, the step S20 of pressing the connecting member to hemming the edge of the filtration layer includes: Step S21' of placing the outer edge of the filtration layer on the unbent portion of the connection member; and step S22' of folding the bent portion of the connection member in the axial direction of the connection member using a resistance welding electrode to form a folded portion against which the edge of the filtration layer can be pressed and fixed.

[0083] Specifically, resistance welding can be performed by directly pressing both resistance welding electrodes against the folded portion and the filter frame, respectively. Here, the acute angle formed between the folded portion and the annular body can be directly pressed and welded with the electrodes. The connection member and the filter are pressed down by the resistance welding electrodes to form a primary shape, and then welded and fixed. This simplifies the manufacturing process of the filter assembly and ensures connection strength.

[0084] In one embodiment, after step S20 of pressing the connecting member to hemming the edge of the filtration layer, Step S31: bringing one electrode for resistance welding into contact with the folded portion and bringing the other electrode into contact with the filter frame; The method further includes step S32 of applying pressure to the folded portion and the filter frame by both electrodes to energize them.

[0085] Specifically, the connecting member is placed on the surface of the filter frame facing the filtration layer, and then one electrode for resistance welding is abutted against the folded portion and the other electrode is abutted against the filter frame, and both electrodes apply pressure to the folded portion and the filter frame, respectively, and electricity is passed through, thereby fixedly connecting the connecting member to the filter frame.

[0086] First, the folded connecting member is placed on the connection part of the filter frame, then the filtration layer is placed in the space formed by the folded (folded) and unfolded (annular) parts of the connecting member, finally the filter frame is placed on one of the electrodes used during resistance welding, and the side of the filter frame's connection part away from the filtration layer is brought into contact with the electrode, and the other electrode used during resistance welding is abutted against the folded part of the connecting member, and pressure is applied to press the filter, thereby achieving double hemming of the filtration layer. Finally, electricity is passed through both electrodes and pressure is continued to be applied, thereby fixedly connecting the connecting member and the filter frame.

[0087] In one embodiment, before step S30 of fixedly connecting the connection member to the filter frame by pressure welding, the method further includes step S301 of forming a protrusion on the filter frame by a punching process that protrudes toward the connection member, and applying pressure to the folded portion and the protrusion by an electrode.

[0088] Specifically, to ensure that the gap between the connecting member and the filter stand before welding is 0.5 cm, a protrusion that protrudes toward the connecting member is formed at the connection point of the filter stand using a punching process, which not only increases production efficiency but also increases the joining strength of the welded points.

[0089] Optionally, the length of contact between the filtration layer and the folded portion along the radial direction of the connecting member is a first preset length, which is half the length of the folded portion of the connecting member along the radial direction, thereby improving the hemming effect of the connecting member on the filtration layer. Of course, the first preset length may be another length, such as one-third of the length of the folded portion along the radial direction.

[0090] The bent connecting member is placed on the filter stand, and then the filter layer is accommodated in the connecting member. Finally, when the connecting member is resistance-welded, one of the resistance-welding electrode The folding part of the connecting member is pressed against the filtration layer by applying force to the folding part of the connecting member. electrode A force is applied to the side of the connection part away from the filtration layer by using both resistance welding electrodes. By continuously applying pressure and passing electricity through both electrodes, the connection part and the filter frame are fixed together. Because the filtration layer is already hemmed during welding and resistance welding is used, there are no problems with the mesh dissolving and falling off or the welding slag falling off. As a result, even when the filter assembly is applied to a liquid storage device, foreign matter such as those mentioned above will not get into the device, improving product reliability.

[0091] The technical features of the above-described embodiments can be combined in any desired manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, any combination should be considered within the scope described in this specification.

[0092] The above examples merely illustrate some embodiments of the present application, and although the descriptions are relatively specific and detailed, they should not be understood as limiting the scope of the utility model claims. It should be noted that those skilled in the art may make some modifications and improvements without departing from the spirit of the present application, and all of them will fall within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application shall be determined by the scope of the appended claims.

Claims

1. the filter layer, a filter frame, and a connecting member, one side of the connecting member being provided on the filter frame, the other side extending from a bottom of the filter layer to an outer edge of the filter layer and being pressed against the filter layer by being bent, and the connecting member being fixedly connected to the filter frame by welding; the filter frame includes a connection portion fixedly connected to the connection member, The connection portion is provided with a protrusion facing the filtration layer, and the connection portion is fixed to the connection member by resistance welding via the protrusion, the filter frame further includes a flow guiding portion protruding toward the filtration layer, the flow guiding portion being provided facing the filtration layer and capable of diverting a fluid from the filtration layer, the connection portion being provided around the circumferential direction of the flow guiding portion, a base portion is provided between the connection portion and the flow guiding portion, and a plurality of flow rate reducing holes are formed in the base portion, and the plurality of flow rate reducing holes are evenly arranged along a circumferential direction of the flow guiding portion; the filtration layer includes a first filter and a second filter that are stacked together, The meshes of the first filter and the second filter are arranged in a staggered pattern and are in close contact with each other, A filter assembly in which a certain gap is generated between the connection portion and the connection member before welding.

2. the connecting member includes an annular body and a folded portion fixed to each other, the annular body being pressed against the filter frame and extending from a bottom of the filtration layer to an outer edge of the filtration layer, the folded portion being connected to the outer edge of the annular body and folded toward the filtration layer and pressed against the filtration layer; 2. The filter assembly of claim 1, wherein a space is formed between the annular body and the folded portion to accommodate an edge of the filtration layer, and the folded portion is pressed against a side of the filtration layer away from the filter frame.

3. The filter assembly according to claim 1 , wherein the number of the protrusions is plural, and the plural protrusions are arranged at equal intervals along the circumferential direction of the connection portion.

4. The filter assembly according to claim 1 , wherein the mount portion is recessed in a direction away from the filtration layer to form a guide groove, and the flow rate reduction hole communicates with the guide groove.

5. The filter assembly according to claim 4 , wherein the wall surface of the guide groove is formed into an arcuate surface.

6. 2. The filter assembly according to claim 1, wherein the filtration layer includes a first filter and a second filter stacked together, and an edge of the first filter and an edge of the second filter are disposed within the connecting member.

7. A liquid storage device comprising a cylinder, an intake pipe, an exhaust pipe, and the filter assembly according to any one of claims 1 to 6, wherein the filter assembly is fixedly connected to the cylinder via the filter mount.

8. bending the connecting member to form a space for receiving an edge of the filtration layer; pressing the connecting member to hemming the edge of the filtration layer; fixedly connecting the connecting member to the filter frame by pressure welding; Including, The step of bending the connecting member to form a space for accommodating an edge of the filtration layer by the connecting member includes: A method for manufacturing a filter assembly, comprising: bending an outer edge of the connecting member along an axial direction of the connecting member to form a space with the connecting member that accommodates an edge of the filtration layer.

9. The step after bending the outer edge of the connection member along the axial direction of the connection member to form a space for accommodating the edge of the filtration layer by the connection member is: placing an edge of the filtration layer on an unfolded portion of the connecting member; and folding the bent portion of the connecting member in the axial direction of the connecting member to form a folded portion that can press and fix an edge of the filtration layer.

10. The step of fixedly connecting the connection member to the filter frame by pressure welding includes: The method of manufacturing a filter assembly according to claim 8, comprising fixedly connecting the connecting member to the filter frame by resistance welding.

11. The step of bending the connecting member to form a space for accommodating an edge of the filtration layer by the connecting member includes:

11. The method of claim 10, further comprising: folding an outer edge of the connecting member to form a space to accommodate an edge of the filtration layer, such that an acute angle is formed between the folded portion and an unfolded portion of the connecting member.

12. The step of pressing the connecting member to hemming the edge of the filtration layer includes: placing an edge of the filtration layer on an unfolded portion of the connecting member; and folding the folded portion of the connection member in the axial direction of the connection member with an electrode for resistance welding to form a folded portion that can press and fix an edge of the filtration layer.

13. After the step of pressing the connecting member to hemming the edge of the filtration layer, one electrode for the resistance welding is brought into contact with the folded portion, and the other electrode is brought into contact with the filter frame; The method for manufacturing a filter assembly according to claim 12 , further comprising: applying pressure to the folded portion and the filter frame by both of the electrodes, respectively, and applying an electric current thereto.

14. before the step of fixedly connecting the connection member to the filter frame by crimping, The method for manufacturing a filter assembly according to claim 13, further comprising forming a protrusion on the filter frame by a punching process, the protrusion protruding toward the connecting member, and applying pressure to the folded portion and the protrusion by the electrode.

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