Filter cavity and filter

Abstract

The utility model is suitable for the technical field of communication equipment, and provides a filter cavity and a filter. The filter cavity comprises a cavity body and a back plate, the cavity body comprises a bottom plate and a side plate, the bottom plate and the side plate are connected and jointly define an inner cavity used for containing a filter element, the back plate is connected to the side, away from the inner cavity, of the cavity body, and a deformation gap is formed between the back plate and the bottom plate. According to the utility model, the deformation gap is arranged between the bottom plate and the back plate, and when the back plate is subjected to external impact, the deformation gap can absorb a part of impact force and can also provide a space for deformation of the back plate, so that the external impact force cannot be directly transmitted to the filter element, and extrusion to the bottom plate after deformation of the back plate can be reduced or avoided; therefore, the influence on the filter element mounted on the bottom plate is reduced, the risk of breakage or displacement of the filter element due to impact is reduced to a certain extent, the impact resistance of the filter cavity is improved, and the stability of the filter is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of communication equipment, and in particular relates to a filter cavity and a filter. Background Art

[0002] The filter may encounter high-intensity external force impact during use, but most of the existing filters have the problem of poor external structural strength. When the filter is subjected to external force impact, the internal structure may be damaged or the position of the internal structure may be moved, causing product indicators to jump or fail, which seriously affects the stability and safety of the product. Utility Model Content

[0003] The utility model aims to provide a filter cavity and a filter, aiming to solve the technical problem in the prior art that the internal structure of the filter is easily damaged or moved after being impacted.

[0004] The utility model is implemented as follows: in a first aspect, a filter cavity is provided, comprising a cavity body and a back plate, wherein the cavity body comprises a bottom plate and a side plate, wherein the bottom plate is connected to the side plate and together encloses an inner cavity for accommodating a filter element, and the back plate is connected to a side of the cavity body that is away from the inner cavity, and a deformation gap is arranged between the back plate and the bottom plate.

[0005] In some embodiments, the back plate and the cavity body are an integral structure.

[0006] In some embodiments, the back plate is separately connected to the side of the bottom plate facing away from the inner cavity.

[0007] In some embodiments, a deformation groove is provided on the side of the back plate close to the bottom plate, the deformation gap is formed between the bottom of the deformation groove and the bottom plate, and the back plate is against the bottom plate.

[0008] In some embodiments, a first reinforcement portion is disposed on the bottom of the deformation groove.

[0009] In some embodiments, the first reinforcement portion includes a first rib and a second rib that are arranged crosswise with each other.

[0010] In some embodiments, the first convex rib and the second convex rib separate the deformation groove into a plurality of regions, and a third convex rib is disposed in each of the regions.

[0011] In some embodiments, a second reinforcement portion is disposed on a side of the back plate facing away from the bottom plate.

[0012] In some embodiments, the back plate and the bottom plate are connected by fasteners.

[0013] The filter cavity provided by the utility model, the back plate and the cavity body together constitute the entire filter cavity, the bottom plate and the side plate together enclose an inner cavity for accommodating the filter element, the back plate is located on the side of the bottom plate away from the inner cavity, and a deformation gap is arranged between the bottom plate and the back plate. When the back plate is subjected to external impact, the deformation gap can absorb part of the impact force, and can also provide space for the deformation of the back plate without directly transmitting the external impact force to the filter element, and can also reduce or avoid the squeezing of the bottom plate after the back plate is deformed, thereby reducing the influence on the filter element installed on the bottom plate, thereby reducing the risk of the filter element being broken or shifted due to impact to a certain extent, improving the impact resistance of the filter cavity, and thereby improving the stability of the filter.

[0014] In addition, the total thickness of the back plate and the bottom plate can be designed to be the bottom plate thickness in the related art, which can be regarded as improving the bottom plate in the related art to a structure in which the back plate and the bottom plate are overlapped, and a deformation gap is constructed between the two plates to absorb collision energy. Furthermore, without increasing the overall thickness of the bottom plate of the filter cavity, the filter cavity has better impact resistance, which improves the overall safety of the filter while ensuring the simplicity and lightness of the filter cavity structure.

[0015] In a second aspect, a filter is provided, comprising the filter cavity described in any one of the above items, and a filter element arranged in the filter cavity, at least part of the filter element corresponds to the deformation gap.

[0016] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a filter cavity provided by an embodiment of the utility model;

[0019] Figure 2 It is a schematic cross-sectional structural diagram of a filter cavity provided by an embodiment of the utility model;

[0020] Figure 3 It is a schematic structural diagram of the side of the back plate facing the bottom plate adopted in the embodiment of the utility model.

[0021] Description of reference numerals:

[0022] 1. Cavity body; 10. Inner cavity; 11. Bottom plate; 12. Side plate; 2. Back plate; 21. Deformation groove; 22. First reinforcement part; 221. First convex rib; 222. Second convex rib; 223. Third convex rib; 23. Second reinforcement part; 231. Fourth convex rib; 3. Deformation gap; 4. Fastener. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar devices or devices having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two devices or the interaction relationship between two devices. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] As a communication device, filters often need to work in outdoor environments. During the use of filters, they will encounter harsh environments and cause the filter cavity to be subjected to high-intensity impact. After the filter cavity is subjected to high-intensity impact, the structure inside the filter cavity will be damaged or displaced, which will cause the filter to have index jumps or failures. At present, in order to increase the strength of the filter cavity, the commonly used method is to thicken the wall thickness of the cavity. However, the thickening method will cause a significant increase in the overall weight of the cavity, and the increase in thickness will also easily increase the difficulty of cavity manufacturing.

[0029] Based on this, in order to solve the technical problem in the related art that the filter cavity cannot effectively increase the impact resistance of the filter cavity while maintaining its lightness, the present application proposes the following solution:

[0030] Please refer to Figures 1 to 3 As shown, in an embodiment of the utility model, a filter cavity is provided, including a cavity body 1 and a back plate 2, the cavity body 1 includes a bottom plate 11 and a side plate 12, the bottom plate 11 is connected to the side plate 12 and together encloses an inner cavity 10 for accommodating a filter element, the back plate 2 is connected to a side of the cavity body 1 away from the inner cavity 10, and a deformation gap 3 is arranged between the back plate 2 and the bottom plate 11.

[0031] Specifically, the cavity body 1 is a closed cavity formed by a cover plate (not shown in the figure) and a bottom plate 11 that are arranged opposite to each other, and a side plate 12 connected between the cover plate and the bottom plate 11, and the back plate 2 is arranged on the side of the bottom plate 11 away from the inner cavity 10. The back plate 2 and the bottom plate 11 can both be plate-shaped or block-shaped components with a certain thickness. The deformation gap 3 refers to the space between the bottom plate 11 and the back plate 2, which can be, but is not limited to, an air layer.

[0032] It should be noted that the bottom plate 11 can be connected to the end of the side plate 12 (such as Figure 1 , Figure 2 The bottom plate 11 may also be connected to any position between the two ends of the side plate 12 (not shown in the figure), for example, connected to the middle of the side plate 12. In this case, the end of the side plate 12 extends and protrudes relative to the bottom plate 11 in a direction away from the inner cavity 10.

[0033] Among them, the bottom plate 11 and the side plate 12 of the cavity body 1 can be an integral structure, for example, integrally formed by casting, machining or die-casting. After the bottom plate 11 and the side plate 12 are formed, the back plate 2 is connected to the side of the bottom plate 11 away from the inner cavity 10, thereby simplifying the production process while ensuring the overall strength of the cavity, making the production and processing of the entire filter cavity simpler.

[0034] The bottom plate 11 and the side plate 12 may also be separate structures, and the bottom plate 11 and the side plate 12 may be assembled to surround the inner cavity 10 , for example, by fastener connection, welding or bonding.

[0035] The back plate 2 is connected to the side of the cavity body 1 away from the inner cavity 10, which means: the back plate 2 can be connected to the side of the bottom plate 11 away from the inner cavity 10; the back plate 2 can also be connected to the side plate 12 and located on the side of the bottom plate 11 away from the inner cavity 10; the back plate 2 can also be connected to both the bottom plate 11 and the side plate 12 and located on the side of the bottom plate 11 away from the inner cavity 10. It can be understood that the back plate 2 can be connected only to the bottom plate 11, only to the side plate 12, or simultaneously to the bottom plate 11 and the side plate 12. When the back plate 2 is connected to the side plate 12, the back plate 2 can be connected to the end surface of the side plate 12, or to the side wall of the side plate 12.

[0036] The filter cavity provided in the embodiment of the present application, the back plate 2 and the cavity body 1 together constitute the entire filter cavity, the bottom plate 11 and the side plate 12 together enclose an inner cavity 10 for accommodating the filter element, the back plate 2 is located on the side of the bottom plate 11 away from the inner cavity 10, and a deformation gap 3 is arranged between the bottom plate 11 and the back plate 2. When the back plate 2 is subjected to external impact, the deformation gap 3 can absorb part of the impact force, and can also provide space for the deformation of the back plate 2 without directly transmitting the external impact force to the filter element, and can also reduce or avoid the squeezing of the bottom plate 11 after the back plate 2 is deformed, thereby reducing the impact on the filter element installed on the bottom plate 11, thereby reducing the risk of the filter element being broken or displaced due to impact to a certain extent, improving the impact resistance of the filter cavity, and thereby improving the stability of the filter.

[0037] In addition, the total thickness of the back plate 2 and the bottom plate 11 can be designed to be the bottom plate thickness in the related art, which can be regarded as improving the bottom plate in the related art to a structure in which the back plate 2 and the bottom plate 11 are overlapped, and a deformation gap 3 is constructed between the two plates to absorb collision energy. Furthermore, without increasing the overall thickness of the bottom plate of the filter cavity, the filter cavity has better impact resistance, which improves the overall safety of the filter while also ensuring the simplicity and lightness of the filter cavity structure.

[0038] In some embodiments, the back plate 2 is an integral structure with the cavity body 1. The back plate 2 is an integral structure with the cavity body 1, which means that the back plate 2 is an integral structure with the bottom plate 11, or the back plate 2 is an integral structure with the side plate 12, or the back plate 2 is an integral structure with the bottom plate 11 and the side plate 12.

[0039] As an implementation method of the back plate 2 and the cavity body 1 being an integral structure, the back plate 2 and the bottom plate 11 are an integral structure, wherein the back plate 2 and the bottom plate 11 can be processed from the same plate, and a flat groove structure parallel to the plate surface is processed in the middle part of the plate in the thickness direction to form a deformation gap 3, while keeping the peripheral edge of the plate partially connected, or keeping the peripheral edge of the plate partially connected and the middle part of the plate partially connected, so as to keep the back plate 2 and the bottom plate 11 as an integral structure.

[0040] As another implementation mode that the back plate 2 and the cavity body 1 are an integral structure, the back plate 2 and the side plate 12 are an integral structure. The side plate 12 is integrally connected with the back plate 2 to form a U-shaped frame with one end open, and the bottom plate 11 is installed in the U-shaped frame and close to the back plate 2. The periphery of the bottom plate 11 is connected to the inner wall of the side plate 12, and a certain distance is maintained between the bottom plate 11 and the back plate 2 to form a deformation gap 3.

[0041] As another implementation method that the back plate 2 and the cavity body 1 are an integral structure, the back plate 2, the bottom plate 11, and the side plate 12 are an integral structure. Specifically, a U-shaped frame with one end open can be provided, and the bottom wall of the U-shaped frame has a sufficient thickness. As described in the above embodiment, a flat groove is processed in the middle of the bottom wall in the thickness direction to form a deformation gap 3, and the bottom wall is divided into the back plate 2 and the bottom plate 11.

[0042] In the above embodiment, the back plate 2 and the cavity body 1 are an integrated structure, so that the structure of the filter cavity has better integrity, is simpler and more stable.

[0043] In other embodiments, the back plate 2 and the cavity body 1 are separate structures. The back plate 2 and the cavity body 1 are separate structures, which means: the back plate 2 is separately connected to the bottom plate 11, and the back plate 2 is also separately connected to the side plate 12; or the back plate 2 is separately connected to the bottom plate 11, and the back plate 2 is not connected to the side plate 12; or the back plate 2 is separately connected to the side plate 12, and is not connected to the bottom plate 11.

[0044] In the above embodiment, the back plate 2 and the cavity body 1 are split structures, and the back plate 2 and the bottom plate 11, and the back plate 2 and the side plate 12 are not integrally connected. Therefore, the cavity body 1 can be designed according to the conventional design ideas of the filter cavity in the relevant technology. Finally, it is only necessary to split the back plate 2 and connect it to the cavity body 1, without the need for additional design and processing of the structure of the cavity body 1 itself and the internal structure of the cavity body 1.

[0045] refer to Figures 1 to 3In some embodiments, the back plate 2 is separately connected to the side of the bottom plate 11 away from the inner cavity 10. It can be understood that in this embodiment, the back plate 2 and the side plate 12 can be connected or not connected. When the back plate 2 and the side plate 12 are connected, the back plate 2 and the side plate 12 can be separately connected or integrally formed, as long as the connection relationship between the back plate 2 and the bottom plate 11 is a separate connection.

[0046] As an implementation method of the split structure of the back panel 2 and the bottom panel 11, a support member can be set between the edge of the back panel 2 and the edge of the bottom panel 11, and the edge of the back panel 2, the support member and the edge of the bottom panel 11 are fixedly connected by fasteners, so that a certain gap is maintained between the back panel 2 and the bottom panel 11 to obtain a deformation gap 3. The support member can block a part of the edge of the bottom panel 11 and the back panel 2 to form a non-closed deformation gap 3, or it can block the entire circumference of the edge of the bottom panel 11 and the back panel 2 to form a closed deformation gap 3.

[0047] As another implementation method of separately connecting the back plate 2 and the bottom plate 11, please refer to Figure 2 A deformation groove 21 is provided on the side of the back plate 2 close to the bottom plate 11, and a deformation gap 3 is formed between the bottom of the deformation groove 21 and the bottom plate 11. The back plate 2 is against the bottom plate 11, and the back plate 2 and the bottom plate 11 are fixedly connected by fasteners 4, or the back plate 2 and the bottom plate 11 are connected by bonding, welding, plugging, clamping, etc.

[0048] The deformation groove 21 can be formed by casting or stamping; it can also be formed by machining. The deformation groove 21 generally only occupies a portion of the side of the entire back plate 2. After the back plate 2 is connected to the side of the bottom plate 11 away from the inner cavity 10, the other areas of the side of the back plate 2 close to the bottom plate 11 except for the area where the deformation groove 21 is located are at least partially or completely against the side of the bottom plate 11. At this time, the bottom of the deformation groove 21 will be spaced from the side of the bottom plate 11, forming the above-mentioned deformation gap 3. By forming the above-mentioned deformation gap 3 by setting the deformation groove 21, the overall impact resistance of the filter cavity can be improved while reducing the overall weight of the filter cavity, which is conducive to the lightweight of the filter.

[0049] In addition, the deformation groove 21 is generally arranged in the middle area of ​​the back plate 2. When the back plate 2 is installed on the side of the bottom plate 11 away from the inner cavity 10, the edge of the back plate 2 can be against the side of the bottom plate 11. The back plate 2 and the bottom plate 11 can be directly fixedly connected by fasteners 4 or bonding, without adding other structural parts, and the structure is simple. In addition, the part corresponding to the deformation groove 21 on the back plate 2 is thinner, and the edge part is thicker. Compared with the flat plate structure of the back plate 2, the deformation groove 21 part is easier to deform to absorb the impact force.

[0050] It can be understood that in other embodiments, a deformation groove can be provided on the side of the bottom plate 11 facing the back plate 2, or a deformation groove can be provided on the side of the back plate 2 close to the bottom plate 11 and on the side of the bottom plate 11 facing the back plate 2, and the back plate 2 and the bottom plate 11 can be abutted and connected.

[0051] Optionally, when deformation grooves are provided on the back plate 2 and / or the bottom plate 11, the edge of the back plate 2 and the edge of the bottom plate 11 may be continuously abutted in the circumferential direction to form a closed deformation gap 3, which can prevent external dust or other debris from entering the deformation gap 3, or may be intermittently abutted in the circumferential direction to form a non-closed deformation gap 3, which is more conducive to gas circulation and increases the deformability of the back plate 2 to a certain extent.

[0052] In this embodiment, the bottom plate 11 and the back plate 2 are separately connected, and a deformation groove is set on the back plate 2 to facilitate the formation of the deformation gap 3 and to facilitate the direct abutment connection between the bottom plate 11 and the back plate 2. Compared with the solution in which the back plate 2 and the bottom plate 11 are flat plates and the deformation gap 3 is formed by a support member, this embodiment has fewer structural parts, is more convenient to connect, and has better structural stability.

[0053] In some embodiments, reference Figure 2 The deformation groove 21 can be a groove with a larger area, that is, there is only a larger deformation gap 3 between the back plate 2 and the bottom plate 11, and the edge of the back plate 2 abuts against the edge of the bottom plate 11. The deformation groove 21 has a simple structure and can buffer the impact force on the back plate 2 over a large area to protect the filter element in the filter cavity.

[0054] In other embodiments, the deformation groove 21 includes a plurality of sub-grooves arranged at intervals, each of which defines a gap unit, and a plurality of gap units constitute the entire deformation gap 3. At this time, the back plate 2 and the bottom plate 11 abut not only at the edges, but also at the positions between adjacent sub-grooves. This deformation groove 21 structure can set the position and area of ​​the sub-grooves according to the position of the filter element to be protected, thereby increasing the contact area between the back plate 2 and the bottom plate 11 while protecting the filter element, making the connection between the two more reliable.

[0055] In some embodiments, a first reinforcing portion 22 is provided on the bottom of the deformation groove 21. The first reinforcing portion 22 may be an independent component, fixed in the deformation groove 21 by welding or bonding, or may be integrally formed with a structural member (such as the back plate 2 or the bottom plate 11) in which the deformation groove 21 is provided. Preferably, the first reinforcing portion 22 is integrally formed with the main body of the back plate 2.

[0056] Specifically, the back plate 2 is provided with a deformation groove 21, and the bottom of the deformation groove 21 is integrally connected with a first reinforcement portion 22. The portion of the first reinforcement portion 22 away from the bottom of the deformation groove 21 can be against the side of the bottom plate 11, which is equivalent to dividing the deformation groove 21 into a plurality of sub-grooves. The portion of the first reinforcement portion 22 away from the bottom of the deformation groove 21 can also be arranged at intervals from the side of the bottom plate 11. The shape of the first reinforcement portion 22 can be any one of a columnar, block or strip shape, or a combination of multiple shapes. The arrangement of the first reinforcement portion 22 can support the area where the deformation groove 21 is located on the back plate 2, thereby improving the strength and impact resistance of the back plate 2.

[0057] Further, the first reinforcing portion 22 includes a first rib 221 and a second rib 222 that are arranged crosswise with each other. The first rib 221 and the second rib 222 are both strip-shaped parts. The number of the first rib 221 and the second rib 222 can be multiple. When the number of the first rib 221 is multiple, the multiple first ribs 221 are arranged at intervals from each other; when the number of the second rib 222 is multiple, the multiple second ribs 222 are arranged at intervals from each other. The multiple first ribs 221 and the multiple second ribs 222 can be arranged crosswise with each other to form a grid, and the above-mentioned grid is evenly distributed on the bottom surface of the entire deformation groove 21, providing a more uniform support force for the entire deformation groove 21 area, which can ensure that the impact resistance in the area corresponding to the deformation gap 3 of the back plate 2 is more uniform. In addition, the first reinforcement part 22 adopts a cross-arrangement of the first convex rib 221 and the second convex rib 222, which can not only ensure that the first reinforcement part 22 plays a supporting role, but also reduce the volume occupied by the first reinforcement part 22 as a whole, thereby reducing the overall weight of the backboard 2 and making the backboard 2 lighter.

[0058] In addition, by cross-setting the first rib 221 and the second rib 222, the bottom of the entire deformation groove 21 is divided into multiple independent areas. When the back panel 2 is deformed by impact, the position of the deformation will only be limited to the area around the impacted area, avoiding the deformation from spreading to other areas on the back panel 2, thereby making the back panel 2 more impact-resistant.

[0059] Based on the above-mentioned first convex rib 221 and second convex rib 222, as Figure 3 As shown, the first rib 221 and the second rib 222 divide the deformation groove 21 into multiple areas, and each area is provided with a third rib 223. The third rib 223 can further provide a separate reinforcement support in each area based on the multiple areas, further improving the impact resistance of the back plate 2 and the strength of the back plate 2 at the deformation groove 21.

[0060] Specifically, the first rib 221 and the second rib 222 are arranged perpendicular to each other, and the bottom of the deformation groove 21 is divided into a plurality of rectangular areas by the first rib 221 and the second rib 222. The third ribs 223 in the same area are arranged along the diagonal of the above-mentioned rectangular area, so that the first reinforcement part 22 provides more uniform support force for the entire deformation groove 21 area.

[0061] In one embodiment, Figure 1 As shown, a second reinforcing portion 23 is provided on one side of the back plate 2 away from the bottom plate 11. The second reinforcing portion 23 is used to increase the overall strength of the back plate 2. Specifically, the second reinforcing portion 23 refers to a component with a certain height. The shape of the second reinforcing portion 23 can be any one of a columnar, block or strip shape, or a combination of multiple shapes. The provision of the second reinforcing portion 23 can improve the overall strength of the back plate 2, to a certain extent avoid deformation of the back plate 2 due to its own stress, and also improve the impact resistance of the back plate 2.

[0062] In one embodiment, Figure 1 As shown, the second reinforcing part 23 includes a plurality of fourth ribs 231, and two adjacent fourth ribs 231 are arranged at intervals. Specifically, the fourth rib 231 refers to a strip-shaped component with a certain length, wherein the fourth rib 231 can be made by casting, die-casting or machining. And by arranging the plurality of fourth ribs 231 at intervals, the fourth ribs 231 can be evenly distributed on the side of the entire back plate 2, ensuring that the second reinforcing part 23 plays a reinforcing support role. At the same time, compared with the case where the second reinforcing part 23 is designed as a plate-shaped or block-shaped structure, the interval arrangement of the fourth ribs 231 can also reduce the volume occupied by the second reinforcing part 23, thereby reducing the weight of the back plate 2 increased by the second reinforcing part 23, making the entire back plate 2 lighter.

[0063] The fourth rib 231 can be formed integrally with the main body of the back plate 2. Specifically, the fourth rib 231 can be made by casting, stamping or machining, which can ensure the overall strength of the back plate 2.

[0064] In each of the above-mentioned embodiments in which the back plate 2 and the bottom plate 11 are separately connected, the back plate 2 and the bottom plate 11 can be connected by a fastener 4, and the fastener 4 passes through the back plate 2 and is fixed to the bottom plate 11. The back plate 2 can be provided with a mounting hole for the fastener 4 to pass through, and the bottom plate 11 is provided with a threaded hole that cooperates with the fastener 4. When the back plate 2 is fixed, the fastener 4 can be passed through the mounting hole and connected to the threaded hole on the bottom plate 11. The back plate 2 is pressed and fixed to the bottom surface of the bottom plate 11 by the fastener 4, which can make the installation of the back plate 2 more convenient and quick, and also make the connection between the back plate 2 and the bottom plate 11 more firm and reliable, and also make the strength of the filter cavity better.

[0065] Furthermore, if Figure 1 As shown, in order to ensure that the back plate 2 is more firmly fixed on the bottom plate 11 and the force at each part of the back plate 2 is more uniform, the number of fasteners 4 is multiple. The multiple fasteners 4 can be divided into two groups, and the two groups of fasteners 4 are respectively located at the two ends of the back plate 2 along the length direction, and the fasteners 4 in each group of fasteners 4 are arranged at intervals along the width direction of the back plate 2; in addition, the multiple fasteners 4 can also be directly arranged in sequence along the circumference of the back plate 2, so that after the back plate 2 is installed on the side of the bottom plate 11, the force at each part of the back plate 2 is more uniform, so that the back plate 2 is fixed more stably.

[0066] In the second aspect, a filter is provided, comprising a filter cavity according to any one of the above items, and a filter element disposed in the filter cavity, wherein at least some of the filter elements correspond to the deformation gap 3. Specifically, the setting of the deformation gap 3 can buffer the impact force on the back plate 2, and the filter element is arranged at a position corresponding to the deformation gap 3 in the inner cavity 10, which can buffer the impact on the filter element to a certain extent and reduce the risk of loosening and damage of the filter element. Specifically, it can be preferred to arrange the filter element that is easy to loosen and has a greater impact on indicators such as frequency at the position corresponding to the deformation gap 3. Of course, all the filter elements can also be arranged at the position corresponding to the deformation gap 3.

[0067] The above description is mainly to illustrate the innovation of the filter cavity and the filter provided in the embodiment of the present application. In addition to the above-mentioned devices, the filter provided in the embodiment of the present application may also have other devices, and other devices may adopt the devices of the existing filter, which is well known to those skilled in the art and will not be described here. In addition, the bottom plate 11, the back plate 2, the fastener 4 and other devices shown in the drawings are all shown for exemplary purposes and are not limited to the shapes and quantities in the drawings.

[0068] The above description is only a preferred embodiment of the utility model, and only specifically describes the technical principle of the utility model. These descriptions are only for explaining the principle of the utility model and cannot be interpreted as limiting the protection scope of the utility model in any way. Based on the explanation here, any modification, equivalent replacement and improvement made within the spirit and principle of the utility model, and other specific implementation methods of the utility model that can be associated with the technicians in this field without creative labor, should be included in the protection scope of the utility model.

Claims

1. A filter cavity, characterized in that: It includes a cavity body and a back plate, the cavity body includes a bottom plate and a side plate, the bottom plate is connected to the side plate and together encloses an inner cavity for accommodating a filter element, the back plate is connected to the side of the cavity body away from the inner cavity, and a deformation gap is set between the back plate and the bottom plate.

2. The filter cavity according to claim 1, characterized in that: The back plate and the cavity body are an integrated structure.

3. The filter cavity according to claim 1, characterized in that: The back plate is separately connected to the side surface of the bottom plate away from the inner cavity.

4. The filter cavity according to claim 3, characterized in that: A deformation groove is arranged on the side of the back plate close to the bottom plate, the deformation gap is formed between the groove bottom of the deformation groove and the bottom plate, and the back plate abuts against the bottom plate.

5. The filter cavity according to claim 4, characterized in that: A first reinforcement portion is arranged on the groove bottom of the deformation groove.

6. The filter cavity according to claim 5, characterized in that: The first reinforcement portion includes a first convex rib and a second convex rib that are arranged to cross each other.

7. The filter cavity according to claim 6, characterized in that: The first convex rib and the second convex rib divide the deformation groove into a plurality of regions, and a third convex rib is disposed in each of the regions.

8. The filter cavity according to any one of claims 1 to 7, characterized in that: A second reinforcement portion is arranged on the side of the back plate facing away from the bottom plate.

9. The filter cavity according to any one of claims 3 to 7, characterized in that: The back plate and the bottom plate are connected by fasteners.

10. A filter, characterized in that: It comprises the filter cavity as claimed in any one of claims 1 to 9, and a filter element arranged in the filter cavity, at least part of the filter element corresponds to the deformation gap.

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