A fresh air filter assembly

Abstract

This application provides a fresh air filter assembly, including a frame and a filter. The filter is wavy, and the frame encloses it to form an accommodating space. A connecting groove is provided on one side of the frame within the accommodating space, and the edge of the filter is connected to the connecting groove. It also includes a top cover, to which the frame is connected. The top cover has a snap-fit ​​part for engaging with the locking structure of an air conditioning unit to secure the fresh air filter assembly. This application uses a wavy filter, increasing its thickness and thus enhancing its structural strength. Compared to a planar structure, the wavy structure offers significant advantages in strength, rigidity, and stability. Because the filter has sufficient connecting thickness and structural strength, a stable connection with the frame and connecting groove can be achieved. The edge of the filter does not require a stainless steel wire frame, and the middle of the filter does not need a reinforcing strip, yet the filter can still be securely installed. This simplifies the assembly of the fresh air filter assembly, simplifies the manufacturing process, and reduces costs.

Description

Technical Field

[0001] This application relates to the technical field of air conditioning units, and in particular to a fresh air filter assembly. Background Technology

[0002] The air filter components of existing rail transit train air conditioning systems mostly contain plain-weave stainless steel wire mesh. To straighten and increase the strength of the stainless steel plain-weave mesh, stainless steel fixing frames, i.e., stainless steel wire frames, are usually welded around the perimeter of the mesh. When the plain-weave mesh is long, several reinforcing strips are added in the middle of the mesh. Then, the stainless steel wire frame is placed in a rectangular frame welded from U-shaped aluminum profiles. The inner side of the rectangular frame's four sides has slots, and the stainless steel wire frame is embedded in these slots.

[0003] In the process of realizing this invention, the inventors discovered at least the following problems in the prior art:

[0004] Plain weave mesh is relatively thin. To ensure stable fixation, a stainless steel wire frame needs to be welded around the perimeter of the plain weave mesh to increase the thickness of the connection between the plain weave mesh and the rectangular frame. Furthermore, when the plain weave mesh is long, a reinforcing strip needs to be added in the middle of the mesh, increasing the cost of the components. The stainless steel wire frame is then welded into the rectangular frame, resulting in high manufacturing costs and complex production processes for the fresh air filter assembly.

[0005] Therefore, it is necessary to improve the existing fresh air filter components to solve the above problems. Summary of the Invention

[0006] In view of this, this application provides a fresh air filter assembly, which aims to effectively simplify the manufacturing process of the fresh air filter assembly and reduce manufacturing costs.

[0007] This application provides a fresh air filter assembly, including a frame and a filter. The filter is wavy. The frame surrounds and forms an accommodating space. The frame is provided with a connecting groove on one side of the accommodating space. The edge portion of the filter is connected to the connecting groove.

[0008] It also includes a top cover, the frame piece being connected to the top cover, the top cover having a snap-fit ​​part, the snap-fit ​​part being used to cooperate with the locking structure of the air conditioning unit to fix the fresh air filter assembly.

[0009] Optionally, the frame member includes multiple sub-frames, the multiple sub-frames are connected end to end to form a closed loop, the accommodating space is formed between the multiple sub-frames, and the connecting groove is formed on the side of the multiple sub-frames near the accommodating space.

[0010] Optionally, two adjacent sub-frames are fixedly connected by a first fastener.

[0011] Optionally, two adjacent sub-frames include a first frame and a second frame. The first frame has a first sub-connecting groove on the side near the accommodating space, and the second frame has a second sub-connecting groove on the side near the accommodating space. At least one first sub-connecting groove and at least one second sub-connecting groove together form the connecting groove.

[0012] Optionally, the first frame has a first connecting end at each end, and the second frame has a second connecting end at each end. The second connecting end is connected to the first sub-connecting groove corresponding to the first connecting end, and the second connecting end and the first connecting end are fixedly connected by the first fixing member.

[0013] Optionally, the first frame includes a first frame body connected between the two first connecting ends, and the second frame includes a second frame body connected between the two second connecting ends;

[0014] The first connecting end has an open structure at the end away from the first frame body, and the second connecting end has a fixing part at the end away from the second frame body. The fixing part has a first fixing hole, and the second connecting end has a second fixing hole on the groove bottom wall corresponding to the fixing part. The first fixing member is fixedly connected to the first fixing hole and the second fixing hole.

[0015] Optionally, the first fastener is a rivet, and the first fixing hole and the second fixing hole are rivet holes;

[0016] Alternatively, the first fixing element is a screw, and the first fixing hole and the second fixing hole are screw holes.

[0017] Optionally, two adjacent sub-frames are welded together.

[0018] Optionally, the filter screen includes a plurality of alternating crests and troughs along one direction, and the edge portion of the filter screen connected to the connecting groove includes at least one crest and at least one trough, and the crest and trough respectively abut against the two opposite sidewalls of the frame member located in the connecting groove.

[0019] And / or, the edge portion of the filter screen abuts against the bottom wall of the connecting groove of the frame member.

[0020] Optionally, the top cover has a connecting position, and the frame member is connected to the connecting position and fixedly connected to the top cover by a second fastener;

[0021] The top cover has a handle on the side opposite to the connection position;

[0022] The top cover has the buckle part at one end of the connection position.

[0023] Compared with the prior art, the technical solution provided in this application has at least the following beneficial effects:

[0024] This application provides a fresh air filter assembly, including a frame and a filter. The filter is wavy, and the frame encloses a receiving space. A connecting groove is provided on one side of the frame within the receiving space, and the edge of the filter is connected to the connecting groove. By using a wavy filter, this application increases the filter's thickness, thereby enhancing its structural strength. Compared to a planar structure, the wavy structure has significant advantages in strength, rigidity, and stability. Because the filter has sufficient connecting thickness and structural strength, a stable connection with the frame and connecting groove can be achieved. The edge of the filter does not require a stainless steel wire frame, and the middle of the filter does not need a reinforcing strip, yet the filter can still be securely installed. This simplifies the assembly of the fresh air filter assembly, simplifies the manufacturing process, and reduces costs. In addition, the fresh air filter assembly of this application is also provided with a top cover, and the frame is connected to the top cover. The top cover is provided with a buckle part, which is used to cooperate with the locking structure of the air conditioning unit. Through the buckle part and the locking structure of the air conditioning unit, the fresh air filter assembly can be stably fixed on the air conditioning unit. This design makes installation and disassembly simple and facilitates later maintenance. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the fresh air filter assembly in one embodiment of this application.

[0026] Figure 2 for Figure 1 An exploded view of the fresh air filter assembly.

[0027] Figure 3 for Figure 2 Side view of the filter in the fresh air filter assembly.

[0028] Figure 4 for Figure 2 A three-dimensional structural diagram of the sub-borders of the middle border component.

[0029] Figure 5 for Figure 1 A schematic diagram of the first step of the installation structure of the fresh air filter assembly.

[0030] Figure 6 for Figure 1 A schematic diagram of the second step of the installation structure of the fresh air filter assembly.

[0031] Figure 7 for Figure 1 A schematic diagram of the third step of the installation structure of the fresh air filter assembly.

[0032] Figure 8 for Figure 1A schematic diagram of the fourth step of the installation structure of the fresh air filter assembly.

[0033] Reference numerals: a-First direction; b-Second direction; c-Third direction; 10-Fresh air filter assembly; 12-Frame piece; 12a-Sub-frame; 12a1-First frame; 12a2-Second frame; 121-Bottom wall of the channel; 122-Side wall of the channel; 14-Filter; 14a-Sub-filter unit; 16-Connecting channel; 16a-Sub-connecting channel; 16a1-First sub-connecting channel; 16a2-Second sub-connecting channel; 18-Crest end; 20-Valvet end; 22-First fixing piece; 24-First connecting end; 26-Second connecting end; 28-First frame body; 30-Second frame body; 32-Fixing part; 34-First fixing hole; 36-Second fixing hole; 38-Top cover; 40-Connecting position; 42-Second fixing piece; 44-Base plate; 46-Side frame; 48-Handle; 50-Third fixing hole; 52-Fourth fixing hole; 54-Snap-on part. Detailed Implementation

[0034] Before describing the embodiments in detail, it should be understood that this application is not limited to the detailed structures or element arrangements described below or in the accompanying drawings. This application can be implemented in other ways. Furthermore, it should be understood that the wording and terminology used herein are for descriptive purposes only and should not be construed as limiting. The terms "comprising," "including," "having," and similar expressions used herein mean to include the items listed thereafter, their equivalents, and other additional items. In particular, when describing "an element," this application does not limit the number of elements to one, but may include multiple elements.

[0035] Please also refer to Figure 1 and Figure 2 As shown, this application provides a fresh air filter assembly 10, which can be applied to air conditioning units, such as the fresh air grille of a rail transit train air conditioner. The fresh air filter assembly 10 includes a frame 12 and a filter 14, wherein the filter 14 is wavy. The frame 12 encloses and forms an accommodating space, and a connecting groove 16 is provided on one side of the accommodating space. The edge portion of the filter 14 is connected to the connecting groove 16. By using a wavy filter 14, this application increases the thickness of the filter 14, thereby enhancing its structural strength. Compared with a planar structure, the wavy structure has significant advantages in strength, rigidity, and stability. Because the filter 14 has sufficient connecting thickness and structural strength, a stable connection with the frame 12 and the connecting groove 16 can be achieved. The edge portion of the filter 14 does not need a stainless steel wire frame, and the middle of the filter 14 does not need a reinforcing strip, yet the filter 14 can still be stably installed. This simplifies the assembly of the fresh air filter assembly 10, simplifies the manufacturing process, and reduces costs.

[0036] In one embodiment, the fresh air filter assembly 10 includes a frame 12 and a filter 14. The filter 14 may be wavy. The frame 12 encloses and forms an accommodating space. A connecting groove 16 is provided on one side of the accommodating space, and the edge portion of the filter 14 is connected to the connecting groove 16. The fresh air filter assembly 10 also includes a top cover 38, to which the frame 12 is connected. The top cover 38 is provided with a snap-fit ​​part 54, which can be used to cooperate with the locking structure of the air conditioning unit to fix the fresh air filter assembly 10. That is, the fresh air filter assembly 10 can be stably fixed to the air conditioning unit through the snap-fit ​​part 54 and the locking structure of the air conditioning unit. The locking structure of the air conditioning unit is, for example, a buckle used in conjunction with the snap-fit ​​part 54. It is understood that the fresh air filter assembly 10 can be stably fixed to the air conditioning unit through the snap-fit ​​part 54 and the locking structure of the air conditioning unit. This design makes installation and disassembly simple and facilitates later maintenance.

[0037] The frame component 12 and the filter screen 14 can be designed in various adaptable shapes. In this embodiment, both the frame component 12 and the filter screen 14 can be designed as rectangular structures or roughly rectangular structures, that is, the fresh air filter assembly 10 is rectangular or roughly rectangular in shape as a whole. The fresh air filter assembly 10 is defined with three mutually perpendicular directions: a (first direction a), b (second direction b), and c (third direction c). The first direction a is the length direction of the fresh air filter assembly 10, the second direction b is the width direction of the fresh air filter assembly 10, and the third direction is the thickness direction of the fresh air filter assembly 10.

[0038] Please refer to Figure 3 As shown, the filter screen 14 is designed in a wavy shape, which can be manufactured by stamping based on a plain weave mesh. The undulation direction of the filter screen 14 can be along a first direction a. The filter screen 14 includes multiple sub-mesh units 14a arranged along the first direction a. Along the first direction a, the multiple sub-mesh units 14a are connected end to end in sequence, and adjacent sub-mesh units 14a are connected at an angle, which is set to be greater than 0 degrees and less than 180 degrees, preferably 120 degrees. Preferably, all sub-mesh units 14a have the same length and connection angle. Optionally, the sub-mesh units 14a can be designed in a straight line or an arc shape. In this embodiment, the sub-mesh units 14a are designed in a straight line, making the filter screen 14 have a wavy, sawtooth structure.

[0039] Furthermore, the filter 14 includes a plurality of alternating crest ends 18 and trough ends 20 along the first direction a. A complete sub-mesh unit 14a has one crest end 18 and one trough end 20. The thickness of the filter 14 in the third direction c is the spacing between the crest ends 18 and the trough ends 20. In some embodiments, the two ends of the filter 14 can be a complete sub-mesh unit 14a or a part of a sub-mesh unit 14a. That is, the end portions of the filter 14 can be incomplete sub-mesh units 14a, and the length of the end portions is less than the length of the complete sub-mesh unit 14a.

[0040] In a preferred embodiment, when installing the filter screen 14 into the connecting groove 16 of the frame member 12, the edge portion of the filter screen 14 connected to the connecting groove 16 can be configured to include at least one crest end 18 and at least one trough end 20, meaning that there is at least one complete sub-mesh unit 14a within the connecting groove 16. The crest end 18 and the trough end 20 respectively abut against the two opposite sidewalls of the frame member 12 located in the connecting groove 16, thereby limiting the position of the filter screen 14 by the frame member 12 in the third direction c, effectively preventing the filter screen 14 from shaking in the third direction c, and enhancing the stability of the installation.

[0041] Furthermore, the edge portion of the filter screen 14, i.e., the end portion of the periphery of the filter screen 14, abuts against the bottom wall of the connecting groove 16 of the frame member 12, thereby limiting the filter screen 14 in the first direction a and the second direction b by the frame member 12, effectively preventing the filter screen from shaking in the first direction a and the second direction b, and enhancing the stability of the installation. This design allows the filter screen 14 to achieve a stable connection with the frame member 12 through its own wavy structure, eliminating the need for stainless steel wire frames and reinforcing strips that clamp and support the plain weave mesh in existing fresh air filters, simplifying accessories and installation processes, and reducing costs.

[0042] In some embodiments, please refer to Figure 4 As shown, the frame component 12 includes multiple sub-frames 12a, which are connected end-to-end to form a closed loop. An accommodating space is formed between the multiple sub-frames 12a, and a connecting groove 16 is formed on the side of the multiple sub-frames 12a closest to the accommodating space. For example, the sub-frames 12a can be designed as U-shaped frame structures, with the U-shaped openings of the multiple sub-frames 12a all facing the accommodating space. Each sub-frame 12a includes a bottom wall 121 and side walls 122 connected to both ends of the bottom wall 121. For example, both side walls 122 are perpendicularly connected to the bottom wall 121, and the bottom wall 121 and the two side walls 122 together form a sub-connecting groove 16a. The multiple sub-connecting grooves 16a together form a connecting groove 16.

[0043] It should be understood that in this embodiment, the sub-borders 12a are all straight frame structures, but this application is not limited to this. In other embodiments, the sub-borders 12a can also be designed as bent structures or arc structures. For example, two sub-borders 12a can be provided, and both sub-borders 12a are designed in an L-shape. The two L-shaped sub-borders 12a are connected end to end to form a closed loop structure.

[0044] Existing fresh air filters have high manufacturing costs and complex production processes. This is mainly reflected in the following: During production, the welding of aluminum profiles requires high precision in production processes, environmental temperature and humidity, and the skill level of the welders. Specifically, the welding of the U-shaped aluminum profile rectangular frame occasionally breaks during later maintenance. Common fresh air filters typically have four grooved edges of the U-shaped aluminum profile rectangular frame with inlaid plain mesh, usually fixed together by welding. Later maintenance requires cutting and re-welding, which is inconvenient and complex. For example, when the stainless steel plain mesh needs replacement, the welded edges must be cut open, the stainless steel wire frame replaced, and then the grooved edges welded again. This places high demands on welding equipment, the welding environment, and the skill level of the welders, resulting in high costs for later maintenance and after-sales repair; the price of repairing or replacing the internal filter is close to the product price.

[0045] In a preferred embodiment, such as Figure 2 As shown, two adjacent sub-frames 12a can be fixedly connected by a first fastener 22, for example, by riveting or by screwing (removable). That is, the first fastener 22 can be a rivet or a screw, eliminating the welding process and simplifying the installation process of the frame components 12, thus reducing manufacturing and maintenance costs. In this embodiment, the first fastener 22 is a rivet, and two adjacent sub-frames 12a are fixedly connected by rivets.

[0046] In the illustrated embodiment, the border member 12 is provided with four sub-borders 12a, each corresponding to one of the four sides of the square. Two of the opposite sub-borders 12a are long borders, and the other two opposite sub-borders 12a are short borders.

[0047] Further, the two adjacent sub-frames 12a include a first frame 12a1 and a second frame 12a2, wherein the first frame 12a1 is the aforementioned long frame, and the second frame 12a2 is the aforementioned short frame. The first frame 12a1 has a first sub-connecting groove 16a1 on the side near the accommodating space, and the second frame 12a2 has a second sub-connecting groove 16a2 on the side near the accommodating space. The first sub-connecting groove 16a1 and the second sub-connecting groove 16a2 constitute the aforementioned sub-connecting groove 16a. At least one first sub-connecting groove 16a1 and at least one second sub-connecting groove 16a2 together form a connecting groove 16. In this embodiment, two first sub-connecting grooves 16a1 and two second sub-connecting grooves 16a2 together form a connecting groove 16. The filter screen 14 is connected to two second sub-connecting grooves 16a2 at both ends along the first direction a. For example, at least one crest end 18 and at least one trough end 20 of the filter screen 14 abut against the opposite sidewalls of the second sub-connecting groove 16a2, and the end of the filter screen 14 abuts against the bottom wall of the second sub-connecting groove 16a2, thereby forming a limiting engagement. The filter screen 14 is connected to two first sub-connecting grooves 16a1 at both ends along the second direction b. Each end of the filter screen 14 along the second direction b includes multiple crest ends 18 and multiple trough ends 20. The crest ends 18 and trough ends 20 abut against the opposite sidewalls of the first sub-connecting groove 16a1, and the end of the filter screen 14 abuts against the bottom wall of the first sub-connecting groove 16a1, thereby forming a limiting engagement.

[0048] Specifically, the first frame 12a1 has a first connecting end 24 formed at both ends, and the second frame 12a2 has a second connecting end 26 formed at both ends. The second connecting end 26 is connected to the first sub-connecting groove 16a1 corresponding to the first connecting end 24, and the second connecting end 26 and the first connecting end 24 are fixedly connected by the first fixing member 22.

[0049] More specifically, the first frame 12a1 includes a first frame body 28 connected between two first connecting ends 24, and the second frame 12a2 includes a second frame body 30 connected between two second connecting ends 26. The end of each first connecting end 24 away from the first frame body 28 is open, meaning the first frame 12a1 is open at both ends. The end of each second connecting end 26 away from the second frame body 30 has a fixing part 32, which is, for example, a plate-like structure, meaning the second frame 12a2 is closed at both ends. The fixing part 32 has a first fixing hole 34, and the second connecting end 26 has a second fixing hole 36 on the groove bottom wall 121 of the fixing part 32. A first fixing member 22 is fixedly connected to the first fixing hole 34 and the second fixing hole 36, thereby achieving a fixed connection between the first frame 12a1 and the second frame 12a2. The first fixing member 22 is a rivet, and both the first fixing hole 34 and the second fixing hole 36 are rivet holes.

[0050] Preferably, when the second connecting end 26 is connected to the first connecting end 24, the fixing part 32 is disposed against the bottom wall 121 of the groove of the first connecting end 24, and the two groove side walls 122 of the second connecting end 26 are disposed against the two groove side walls of the first connecting end 24 respectively, which can enhance the tightness of the connection and prevent loosening.

[0051] It should be understood that in other embodiments, the first fixing hole 34 and the second fixing hole 36 may also be correspondingly provided on the groove sidewalls of the first connecting end 24 and the second connecting end 26, as long as it does not affect the installation of the filter screen 14.

[0052] In some other embodiments, when the first fixing member 22 is a screw, the first fixing hole 34 and the second fixing hole 36 are screw holes.

[0053] Preferably, both the frame 12 and the filter screen 14 can be made of stainless steel. On the one hand, stainless steel has high structural strength and good stability, which can achieve a stable connection. On the other hand, stainless steel has lower welding process requirements, which can reduce the cost of later maintenance and after-sales repair.

[0054] In other embodiments, two adjacent sub-frames 12a can also be welded together. Since the frame 12 is made of stainless steel, the requirements for welding equipment, welding environment, and welding personnel can be reduced, as can the requirements for welding process, thereby reducing the cost of later maintenance and after-sales repair.

[0055] In the illustrated embodiment, the fresh air filter assembly 10 further includes a top cover 38, which is, for example, a rectangular structure. A connection position 40 is provided on one side of the top cover 38, which is, for example, a groove structure. A frame member 12 is connected to the connection position 40 and fixedly connected to the top cover 38 via a second fastener 42. Specifically, the top cover 38 includes a base plate 44 and a side frame 46 connected to the periphery of the base plate 44. The base plate 44 and the side frame 46 together form the connection position 40. Preferably, a handle 48 is provided on the side of the base plate 44 of the top cover 38 facing away from the connection position 40. The handle 48 is fixedly connected to the base plate 44, for example, the handle 48 is connected to the center of the base plate 44, to facilitate lifting, pulling, and placing of the fresh air filter assembly 10.

[0056] In this embodiment, a first frame 12a1 of the frame member 12 is fixedly connected to the substrate 44 by a second fastener 42, which can be a rivet or a screw. Specifically, the middle area of ​​the groove sidewall of the first frame 12a1 is provided with a plurality of third fixing holes 50 at intervals, and the substrate 44 is provided with a plurality of fourth fixing holes 52, for example, the fourth fixing holes 52 correspond to the third fixing holes 50 and the second fixing holes 36 respectively. Optionally, the two ends of the handle 48 are respectively provided with fourth fixing holes 52. During installation, the third fixing holes 50 and the fourth fixing holes 52 are positioned correspondingly, and the two fourth fixing holes 52 of the handle 48 are positioned corresponding to the two fourth fixing holes 52 in the middle of the substrate 44. The second fastener 42 is fixedly connected to the third fixing holes 50 and the fourth fixing holes 52, thereby realizing the fixed connection of the frame member 12, the filter screen 14, the top cover 38 and the handle 48. In this embodiment, the second fastener 42 is a rivet, and the third fixing holes 50 and the fourth fixing holes 52 are rivet holes.

[0057] Preferably, the top cover 38 has a latching part 54 at one end of the connecting position 40. For example, two latching parts 54 are provided, respectively located at both ends of the side frame 46 in the first direction a. The latching part 54 is, for example, a hook formed by bending towards the side away from the frame member 12, used to cooperate with the buckle on the fresh air grille of the air conditioning unit, so as to stably fix the fresh air filter assembly 10 in the fresh air grille through the latching cooperation of the hook and the buckle. This design makes installation and disassembly simple and facilitates later maintenance.

[0058] Please also refer to Figures 5 to 8 The diagram shows the installation process of the fresh air filter assembly 10.

[0059] The handle 48, top cover 38, and a first frame 12a1 are riveted together to form a top cover assembly. For example, six rivet holes are provided on the top cover 38 and the first frame 12a1. First, the four middle rivet holes are riveted together. Then, a second frame 12a2 is inserted into the end position of the first sub-connecting groove 16a1 of the first frame 12a1. The first fixing hole 34, the second fixing hole 36, and the fourth fixing hole 52 at the end are aligned and riveted together to fix the second frame 12a2 to the top cover assembly. Based on the train's fresh air volume requirements, the area of ​​the wavy filter 14 is calculated, and a piece of wavy stainless steel wire mesh is cut to form the filter 14. The edges of the filter 14 are embedded into the sub-connecting grooves of the first frame 12a1 and the second frame 12a2. Then, another second frame 12a2 is inserted into the end position of the first sub-connecting groove 16a1 of the first frame 12a1, and the corresponding edges of the filter 14 are embedded into the second sub-connecting groove 16a2. Align the corresponding first fixing hole 34, second fixing hole 36, and fourth fixing hole 52 at the other end, and fix them with rivets to secure the other second frame 12a2 to the top cover assembly. Embed the corresponding edge of the filter 14 into the first sub-connecting groove 16a1 of the other first frame 12a1, while inserting the two second frames 12a2 into the first sub-connecting grooves 16a1 of the first frame 12a1 respectively. Align the first fixing hole 34 and the second fixing hole 36, and fix them with rivets to secure the four frames together to form the frame piece 12, thereby assembling the fresh air filter assembly 10.

[0060] It should be noted that the above-described installation process of the fresh air filter assembly 10 is only illustrative, and other installation methods may also be used in other embodiments.

[0061] This application uses a corrugated stainless steel wire mesh (filter 14) on the fresh air filter assembly 10. Due to the corrugated arched structure of the filter 14, it can effectively resist the water pressure during cleaning and also enhance the structural strength of the entire fresh air filter assembly 10. Compared to existing plain-weave stainless steel wire fresh air filters, this application eliminates the need for a stainless steel wire fixing frame and reinforcing strips to increase structural strength, reducing manufacturing costs. Rivet holes are provided at each connection point of the stainless steel frame component 12, which is then fixed by rivets. The welding process for aluminum profiles is eliminated, avoiding welding deformation, reducing process requirements, and significantly lowering production costs. When the filter 14 needs to be replaced for later maintenance, the rivets on the frame can be removed to replace the filter 14, making disassembly and assembly more convenient and effectively reducing later maintenance costs.

[0062] In summary, this application provides a fresh air filter assembly, including a frame and a filter. The filter is wavy, and the frame encloses a receiving space. A connecting groove is provided on one side of the frame within the receiving space, and the edge of the filter is connected to the connecting groove. By using a wavy filter, this application increases the filter's thickness, thereby enhancing its structural strength. Compared to a planar structure, the wavy structure has significant advantages in strength, rigidity, and stability. Because the filter has sufficient connecting thickness and structural strength, a stable connection with the frame and connecting groove can be achieved. The edge of the filter does not require a stainless steel wire frame, and the middle of the filter does not need a reinforcing strip, yet the filter can still be securely installed. This simplifies the assembly of the fresh air filter assembly, simplifies the manufacturing process, and reduces costs. In addition, the fresh air filter assembly provided in this application is also provided with a top cover, and the frame is connected to the top cover. The top cover is provided with a buckle part, which is used to cooperate with the locking structure of the air conditioning unit. Through the buckle part and the locking structure of the air conditioning unit, the fresh air filter assembly can be stably fixed on the air conditioning unit. This design makes installation and disassembly simple and facilitates later maintenance.

[0063] The concepts described herein may be implemented in other forms without departing from their spirit and characteristics. The specific embodiments disclosed should be considered illustrative rather than restrictive. Therefore, the scope of this application is determined by the appended claims, and not by the preceding description. Any changes within the literal meaning and equivalent scope of the claims should fall within the scope of those claims.

Claims

1. A fresh air filter assembly, characterized in that, The device includes a frame and a filter screen. The filter screen is wavy. The frame surrounds and forms an accommodating space. The frame has a connecting groove on one side of the accommodating space. The edge portion of the filter screen is connected to the connecting groove. It also includes a top cover, the frame piece being connected to the top cover, the top cover having a snap-fit ​​part, the snap-fit ​​part being used to cooperate with the locking structure of the air conditioning unit to fix the fresh air filter assembly.

2. The fresh air filter assembly as described in claim 1, characterized in that, The frame component includes multiple sub-frames, which are connected end to end to form a closed loop. The accommodating space is formed between the multiple sub-frames, and the connecting groove is formed on the side of the multiple sub-frames near the accommodating space.

3. The fresh air filter assembly as described in claim 2, characterized in that, The two adjacent sub-frames are fixedly connected by a first fastener.

4. The fresh air filter assembly as described in claim 3, characterized in that, The two adjacent sub-frames include a first frame and a second frame. The first frame has a first sub-connecting groove on the side near the accommodating space, and the second frame has a second sub-connecting groove on the side near the accommodating space. At least one first sub-connecting groove and at least one second sub-connecting groove together form the connecting groove.

5. The fresh air filter assembly as described in claim 4, characterized in that, The first frame has a first connecting end at each end, and the second frame has a second connecting end at each end. The second connecting end is connected to the first sub-connecting groove corresponding to the first connecting end, and the second connecting end and the first connecting end are fixedly connected by the first fixing member.

6. The fresh air filter assembly as described in claim 5, characterized in that, The first border includes a first border body connected between two first connecting ends, and the second border includes a second border body connected between two second connecting ends; The first connecting end has an open structure at the end away from the first frame body, and the second connecting end has a fixing part at the end away from the second frame body. The fixing part has a first fixing hole, and the second connecting end has a second fixing hole on the groove bottom wall corresponding to the fixing part. The first fixing member is fixedly connected to the first fixing hole and the second fixing hole.

7. The fresh air filter assembly as described in claim 6, characterized in that, The first fastener is a rivet, and the first fixing hole and the second fixing hole are rivet holes; Alternatively, the first fixing element is a screw, and the first fixing hole and the second fixing hole are screw holes.

8. The fresh air filter assembly as described in claim 2, characterized in that, The two adjacent sub-frames are welded together.

9. The fresh air filter assembly as described in any one of claims 1-8, characterized in that, The filter screen includes a plurality of alternating peaks and troughs along one direction. The edge portion of the filter screen connected to the connecting groove includes at least one peak and at least one trough, and the peak and trough ends respectively abut against the two opposite sidewalls of the frame member located in the connecting groove. And / or, the edge portion of the filter screen abuts against the bottom wall of the connecting groove of the frame member.

10. The fresh air filter assembly as described in any one of claims 1-8, characterized in that, The top cover has a connecting position, and the frame member is connected to the connecting position and fixedly connected to the top cover by a second fastener; The top cover has a handle on the side opposite to the connection position; The top cover has the buckle part at one end of the connection position.

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