Primary filter and air treatment device

Abstract

The embodiment of the application discloses a primary filter and an air treatment device. The primary filter is applied to the air treatment device. The primary filter comprises an air inlet and a filter inner cavity in communication with the air inlet. The filter inner cavity is used for collecting pollutants.

Description

Technical Field

[0001] This application relates to the field of air treatment technology, and more particularly to a primary filter and an air treatment device. Background Technology

[0002] With the widespread application of air handling equipment and the increasing demands of users for indoor air quality, air handling equipment typically employs a multi-stage filtration structure to ensure purification effectiveness. This multi-stage filtration structure includes a pre-filter (such as a nylon filter) and a post-filter (High-Efficiency Particulate Air (HEPA) filter) to effectively intercept pollutants of different particle sizes.

[0003] However, in pet-friendly or dusty environments, pre-filters quickly accumulate large amounts of hair and large dust particles. These contaminants often adhere to the outer surface of the pre-filter, and when users disassemble and clean it, the trapped contaminants can easily fall off the filter and scatter onto the floor or surrounding space, not only reducing cleaning efficiency but also potentially causing secondary pollution of the indoor environment. Utility Model Content

[0004] This application discloses a primary filter and an air handling device that can effectively collect pollutants after primary filtration, thereby reducing dust generated during the cleaning of the primary filter and reducing secondary pollution to the indoor environment.

[0005] The first aspect of this application discloses a primary filter element applied to an air handling device. The primary filter element includes an air inlet and a filter cavity communicating with the air inlet, the filter cavity being used to collect pollutants.

[0006] In one possible implementation, the primary filter element has a cavity bottom surface for receiving contaminants, and the air inlet is disposed away from the cavity bottom surface and at a predetermined distance from the cavity bottom surface.

[0007] In one possible implementation, the primary filter element has a cavity bottom surface for receiving contaminants, the air inlet is disposed on the cavity bottom surface, and the primary filter element further includes a damper disposed at the air inlet; or

[0008] In one possible implementation, the edge of the air inlet is provided with a support.

[0009] The second aspect of this application discloses an air handling device, comprising: a housing having an air outlet; a primary filter detachable from the housing, the primary filter being the primary filter provided in the first aspect of this application; a secondary filter disposed in the housing, the secondary filter being plate-shaped and located on the air outlet side of the primary filter, the secondary filter having a higher filtration accuracy than the primary filter; and a fan disposed in the housing, the fan being used to drive airflow from the air inlet through the filter cavity to the air outlet.

[0010] In one possible implementation, the primary filter includes an air outlet surface that is planar and opposite to the secondary filter, and the air inlet avoids the air outlet surface.

[0011] In one possible implementation, the air handling device further includes: a front housing detachably connected to the housing, the front housing including a receiving cavity, the primary filter being detachably disposed within the receiving cavity; the front housing being provided with a first vent, the first vent communicating with the external environment and the air inlet.

[0012] In one possible implementation, the air handling device further includes a first bracket, on which the primary filter is disposed, and the primary filter is detachably connected to the front housing via the first bracket.

[0013] In one possible implementation, the first bracket is provided with a second vent, which is provided in correspondence with the first vent and the air inlet.

[0014] In one possible implementation, the air handling device further includes a second bracket, wherein the primary filter is disposed on the second bracket, and the primary filter is detachably connected to the housing or the secondary filter via the second bracket.

[0015] In one possible implementation, the second support and the primary filter are an integral structure.

[0016] In one possible implementation, the second bracket and the primary filter are exterior components of the air handling device.

[0017] In one possible implementation, the second bracket includes a frame and a grid strip connected to the frame, the frame being provided with a mounting portion capable of being detachably connected to the housing or the secondary filter element.

[0018] In one possible implementation, the air handling device further includes a seal disposed between the primary filter and the secondary filter, wherein the seal is located at the edge of the primary filter or the edge of the secondary filter.

[0019] In one possible implementation, the side of the housing has an opening, the secondary filter is embedded in the opening and detachably mounted to the housing; the air outlet is located at the top of the housing.

[0020] Thus, the primary filter element provided in this application embodiment is provided with a filter cavity, which can effectively intercept large particulate pollutants. The pollutants mainly adhere to the inner surface of the primary filter element and are collected in the filter cavity, reducing the probability of dust generation during the user's disassembly and cleaning of the primary filter element and improving the convenience of cleaning the primary filter element.

[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is one of the structural schematic diagrams of a primary filter element provided in an embodiment of this application;

[0024] Figure 2 This is a second schematic diagram of the structure of a primary filter element provided in an embodiment of this application;

[0025] Figure 3 This is the third schematic diagram of a primary filter element provided in the embodiments of this application;

[0026] Figure 4 This is one of the structural schematic diagrams of an air handling device provided in an embodiment of this application;

[0027] Figure 5 This is one of the exploded structural diagrams of an air handling device provided in the embodiments of this application;

[0028] Figure 6 This is a partial structural schematic diagram of an air handling device provided in an embodiment of this application;

[0029] Figure 7An exploded structural diagram of a primary filter and a secondary filter in an air handling device provided in this application embodiment;

[0030] Figure 8 This is a schematic diagram of the structure of a secondary filter element in an air handling device provided in an embodiment of this application;

[0031] Figure 9 This is a second schematic diagram of the exploded structure of an air handling device provided in an embodiment of this application;

[0032] Figure 10 This is a second schematic diagram of the structure of an air handling device provided in an embodiment of this application;

[0033] Figure 11 This is the third exploded structural diagram of an air handling device provided in the embodiments of this application;

[0034] Figure 12 This is the fourth exploded structural diagram of an air handling device provided in the embodiments of this application;

[0035] Figure 13 An exploded structural diagram of the air handling equipment provided in this application embodiment, showing the relationship between the front housing, primary filter and first support.

[0036] Figure 14 An assembly diagram of a primary filter and a first bracket in an air handling device provided in an embodiment of this application;

[0037] Figure 15 This is the fifth of five exploded structural diagrams of an air handling device provided in the embodiments of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1-Air handling unit; 10-Housing; 101-Air outlet; 102-Opening section; 20-Primary filter element; 201-Filter cavity; 202-Air inlet; 203-Air outlet surface; 204-Cavity top surface; 205-Cavity side surface; 206-Cavity bottom surface; 207-Support element; 30-Secondary filter element; 40-Fan; 50-Second bracket; 60-Front shell; 601-Accommodation cavity; 602-First vent; 603-Slot; 70-First bracket; 701-Second vent; 702-Elastic buckle; 80-Sealing element. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0042] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0043] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0044] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0045] Please see Figures 1 to 3 As shown, this application embodiment provides a primary filter 20, which is applied to an air handling device 1 and used as a pre-filter in the air handling device 1. The primary filter 20 is mainly used to intercept large-particle pollutants (≥10μm) such as hair and dust in the airflow.

[0046] The air handling unit 1 is equipped with a fan 40, which generates negative pressure suction after the fan 40 is started. The primary filter element 20 has an air inlet 202. When the fan 40 is turned on, air from the indoor environment enters the primary filter element 20 through the air inlet 202.

[0047] The primary filter element 20 is constructed as a cavity structure, which is the filter inner cavity 201. The primary filter element 20 can be made of materials with air permeability such as nylon mesh, metal mesh, meltblown fabric, mesh synthetic fiber, and glass fiber.

[0048] Since the primary filter element 20 has a filter cavity 201, it can be understood that the primary filter element 20 is a bag-type structure, such as... Figure 2 As shown, the negative pressure suction generated by the fan 40 causes the air in the indoor environment to form an airflow, which enters the filter cavity 201 from the air inlet 202. Hair, large particulate dust carried by the airflow can be collected in the filter cavity 201. The airflow after primary purification flows out of the primary filter through the tiny holes of the primary filter, thus completing the primary filtration of the airflow.

[0049] Since the large particulate pollutants such as hair and dust intercepted by the primary filter element 20 are collected in the filter inner cavity 201, when the primary filter element 20 is removed from the housing 10, the pollutants attached to the primary filter element 20 will not fall into the indoor environment, so as to avoid secondary pollution.

[0050] In related technologies, the primary filter screen traps pollutants that adhere to one side of its surface. Disassembling the primary filter screen causes vibrations that lead to the pollutants falling off and overflowing. However, the primary filter element 20 provided in this application, because airflow enters the filter cavity 201 from the air inlet 202, may allow a small portion of the pollutants carried by the airflow to adhere to the inner surface of the filter cavity 201, significantly reducing the amount of pollutants adhering to the outer surface of the primary filter element 20. Therefore, dust is less likely to be generated during the disassembly of the primary filter element 20. Furthermore, even if the primary filter element 20 vibrates, the pollutants adhering to the inner surface of the filter cavity 201 will fall into the filter cavity 201 and are less likely to overflow to the outside of the primary filter element 20.

[0051] Thus, the primary filter 20 provided in this embodiment of the application is provided with a filter cavity 201, which can effectively intercept large particulate pollutants. The pollutants are mainly attached to the filter cavity 201 and a small amount is attached to the inner surface of the filter cavity 201, which reduces the probability of dust generation during the disassembly and cleaning of the primary filter 20 and improves the cleaning convenience of the air handling equipment 1.

[0052] like Figure 1As shown, the primary filter element 20 has a bottom surface 206, a top surface 204, and a side surface 205. The top surface 204 is opposite to the bottom surface 206, and the side surface 205 is located between the bottom surface 206 and the top surface 204. Due to gravity, the pollutants collected in the filter cavity 201 are mainly received by the bottom surface 206. The primary filter element 20 also includes an air outlet surface 203, which faces the fan 40. The filtered airflow passes through the air outlet surface 203 based on negative pressure suction, and can be one of the aforementioned bottom surface 206, top surface 204, and side surface 205.

[0053] In some embodiments, such as Figure 2 and Figure 3 As shown, the air inlet 202 is located on the top surface 204 or the side surface 205 of the primary filter element 20. The air inlet 202 is avoided from the air outlet surface 203.

[0054] With the air inlet 202 located on the top surface 204 of the primary filter 20, the airflow enters the filter cavity 201 from top to bottom. Large particulate pollutants are more likely to settle on the bottom surface 206 of the cavity under the action of gravity and airflow suction, reducing the deposition of pollutants on the air outlet surface 203 of the primary filter 20.

[0055] like Figure 2 and Figure 3 As shown, when the air inlet 202 is located on the side 205 of the cavity of the primary filter 20, the air inlet 202 can have a larger air intake area because the side 205 of the cavity has a certain height, thereby improving the air purification efficiency of the primary filter 20.

[0056] like Figure 1 As shown, there are two air inlets 202, which are located on two opposite sides 205 of the primary filter element 20. The airflow entering the filter cavity 201 from the horizontal direction needs to change direction as it flows toward the air outlet 203, which can cause large particulate pollutants to leave the airflow due to inertia and be more easily deposited on the bottom surface 206 of the cavity.

[0057] In some embodiments, the primary filter 20 has a cavity bottom surface 206 for receiving pollutants, and the air inlet 202 is at a preset distance from the cavity bottom surface 206.

[0058] The air inlet 202 can be located on the top surface 204 or the side surface 205 of the cavity, and has a preset distance from the bottom surface 206 of the primary filter element 20. This allows large particulate pollutants (such as hair and dust) to have sufficient storage space for deposition, so as to prevent pollutants from escaping from the air inlet 202 out of the filter cavity 201 again due to insufficient storage space.

[0059] It is understandable that the greater the preset distance between the air inlet 202 and the bottom surface 206 of the cavity, the less likely pollutants are to escape from the air inlet 202 into the indoor environment.

[0060] In some embodiments, the primary filter 20 has a cavity bottom surface 206 for receiving pollutants, an air inlet 202 is disposed on the cavity bottom surface 206, and the primary filter 20 further includes a damper disposed at the air inlet 202.

[0061] To prevent pollutants from falling back into the indoor environment through the air inlet 202 due to gravity when the fan 40 stops working, a backflow preventer can be installed at the air inlet 202. The air inlet 202 can be automatically opened by airflow suction when the fan 40 is working, and can be closed by its own gravity or magnetic attraction when the fan 40 stops working.

[0062] In some embodiments, such as Figures 1 to 3 As shown, a support member 207 is provided on the edge of the air inlet 202.

[0063] The support member 207 can be a ring frame, and its inner side is fixedly connected to the edge of the air inlet 202. Providing the support member 207 at the air inlet 202 enhances the structural strength of the air inlet 202 and reduces potential deformation after long-term use. Thus, the primary filter provided in this embodiment has a filter cavity, which effectively intercepts large particulate pollutants. The pollutants mainly adhere to the inner surface of the primary filter and are collected within the filter cavity, reducing the probability of dust generation during disassembly and cleaning, and improving the ease of cleaning the primary filter.

[0064] Please see Figures 4 to 6 This application also provides an air handling device 1, which can be an air purifier, or an air conditioner, humidifier, dehumidifier or fresh air unit with air purification function.

[0065] The air handling unit 1 may include a housing 10. The housing 10 may serve as the main frame of the air handling unit 1 and may be made of engineering plastic or metal. The housing 10 may have cavities to house working components (e.g., a fan 40) and provide structural protection for the working components.

[0066] like Figure 4 , Figure 5 and Figure 6 As shown, the housing 10 may be provided with an air outlet 101 that communicates with the external environment. The air outlet 101 may be located on the top or side of the housing 10. The air outlet 101 is used to discharge purified air into the indoor environment. An air guide plate may be provided at the air outlet 101 to adjust the airflow direction.

[0067] like Figure 6 As shown, a fan 40 is installed inside the casing 10. The fan 40 can be a centrifugal fan 40, and the exhaust port of the fan 40 is connected to the air outlet 101.

[0068] like Figure 5 As shown, the air handling unit 1 may include a primary filter 20. The primary filter 20 may be any of the primary filter 20 provided in the above embodiments. The beneficial effects of the primary filter 20 will not be elaborated here.

[0069] like Figure 5 and Figure 6 As shown, the air handling unit 1 may include a secondary filter element 30, which may be made of materials such as HEPA filters or activated carbon composite filter media. The filtration accuracy of the secondary filter element 30 is higher than that of the primary filter element 20. The secondary filter element 30 is used to intercept pollutants with a diameter of ≥0.3μm or smaller than 100μm.

[0070] like Figure 5 As shown, the secondary filter element 30 is located on the air outlet side of the primary filter element 20. The secondary filter element 30 and the primary filter element 20 form a multi-stage filtration of pollutants. The probability of the secondary filter element 30 coming into contact with larger dust, particulate matter, hair and lint is reduced, so it does not need to be replaced frequently, which extends the service life of the secondary filter element 30 and also improves the purification performance of the air handling equipment 1.

[0071] like Figure 6 As shown, the secondary filter element 30 is constructed in a plate shape. The "plate-shaped" secondary filter element 30 can be understood as a non-closed structure that extends in a certain direction. The surface of the secondary filter element 30 can be a plane, a curved surface, a combination of planes (such as a serrated plate, a stepped plate, a Z-shaped plate, etc.), or a combination of planes and curved surfaces (such as a flat-top corrugated plate, a pulsator plate, etc.).

[0072] For example, such as Figure 7 As shown, the secondary filter element 30 can be a flat plate. The flat plate secondary filter element 30 can reduce energy loss when airflow passes through, and the pressure difference on both sides of the secondary filter element 30 is small, which can reduce the energy consumption of the air purifier 1.

[0073] like Figure 8 As shown, the secondary filter element 30 can be a corrugated plate. This increases the filtration area of ​​the secondary filter element 30 and the contact area between the secondary filter element 30 and fine particles, thereby improving the filtration effect of the secondary filter element 30. It is suitable for air handling equipment 1 with higher requirements for filtration accuracy.

[0074] It is important to note that the cross-sectional area of ​​the filter cavity 201 of the first filter element 20 can be reasonably set (horizontal or vertical, depending mainly on the location of the air inlet 202, such as the top or side) so that the cross-sectional area of ​​the filter cavity 201 is larger than the area of ​​the air inlet 202. The filter cavity 201 is equivalent to an "expansion buffer". When the airflow flows into the filter cavity 201 from the air inlet 202, it will generate a certain degree of deceleration. This will cause larger particles of pollutants to separate from the airflow due to inertia and settle at the bottom of the filter cavity 201, thereby reducing the surface load of the primary filter element 20 to a certain extent and reducing the wind resistance of the primary filter element 20.

[0075] For example, the ratio of the cross-sectional area of ​​the air inlet 202 to the cross-sectional area of ​​the filter cavity 201 can be 1:3 to 1:4.

[0076] The primary filter element 20 is detachable from the housing 10. The primary filter element 20 can be directly or indirectly connected to the housing 10 via clips or magnetic structures, so that the user can periodically remove the primary filter element 20 from the housing 10 for cleaning or replacement.

[0077] Thus, the air handling equipment 1 provided in this embodiment is configured with a primary filter 20 and a secondary filter 30 to form a multi-stage filtration system. The primary filter 20 first intercepts large particulate pollutants and stores them in the filter cavity 201, and then the secondary filter 30 filters fine particulate matter, extending the service life of the secondary filter 30. The primary filter 20 and the secondary filter 30 adopt a linear layout, resulting in a compact and reasonable structure. Furthermore, the primary filter 20 is designed to be detachable from the housing 10, allowing users to easily clean or replace it, thus improving the ease of use of the air handling equipment 1.

[0078] In some embodiments, the fan 40 is disposed on the air outlet side of the secondary filter 30. Compared to the filtration scheme of the related air handling equipment 1 which uses a cylindrical filter element, the linear arrangement of the primary filter 20, the secondary filter 30 and the fan 40 makes the structure of the air handling equipment 1 more compact and suitable for indoor scenarios with limited space.

[0079] In some embodiments, such as Figure 7 As shown, the primary filter 20 includes an air outlet surface 203, which is planar and opposite to the secondary filter 30, and the air inlet 202 is avoided by the air outlet surface 203.

[0080] If the primary filter element 20 has high rigidity, it can be constructed as a rigid cavity frame, so that the air outlet surface 203 of the primary filter element 20 facing the secondary filter element 30 is flat. If the primary filter element 20 has low rigidity, a bracket can be provided on the outer periphery of the primary filter element 20 to support the primary filter element 20 and make the air outlet surface 203 flat.

[0081] The flat air outlet surface 203 can keep the airflow stable before entering the secondary filter 30, reducing airflow turbulence or local high-speed airflow caused by the curved or irregular surface of the air outlet surface 203, thereby reducing the air resistance when the air flows out of the primary filter 20.

[0082] Furthermore, the secondary filter 30 is constructed as a flat plate structure, and the air outlet surface 203 of the primary filter 20 is constructed as a plane. The air inlet side of the secondary filter 30 is parallel to the air outlet surface 203 of the primary filter 20. The airflow does not need to change direction when passing through the secondary filter 30, thereby reducing the pressure loss of the airflow and reducing the energy consumption of the air handling equipment 1.

[0083] The air inlet 202 is positioned to avoid the air outlet 203, so that the airflow from the air outlet 203 is filtered by the primary filter 20, so that the airflow that has not been filtered by the primary filter does not flow directly from the air inlet 202 to the secondary filter 30.

[0084] In some embodiments, such as Figure 4 and Figure 2 ,as well as Figure 5 and Figure 6 As shown, the air handling unit 1 also includes a front housing 60. The front housing 60 is detachably connected to the housing 10, and the front housing 60 includes a receiving cavity 601, in which the primary filter element 20 is detachably disposed.

[0085] The front housing 60 can be made of engineering plastic or metal. The front housing 60 can be detachably connected to the housing 10 through snap-fit, magnetic fit, or plug-in connection. The front housing 60 can have high rigidity to protect the primary filter element 20 inside from external impacts during use and maintain its initial shape.

[0086] like Figure 9 As shown, the front housing 60 includes a receiving cavity 601 for accommodating the primary filter element 20. The shape of the receiving cavity 601 is adapted to the shape of the primary filter element 20, so that the primary filter element 20 can be stably placed in the receiving cavity 601.

[0087] Understandable, such as Figure 5As shown, based on the compatibility between the receiving cavity 601 and the primary filter element 20, no other connecting parts are needed between the primary filter element 20 and the front housing 60, allowing users to more easily remove the primary filter element 20 from the receiving cavity 601. This allows users to remove the front housing 60 from the housing 10 and then remove the primary filter element 20 from the receiving cavity 601, thus facilitating the replacement or cleaning of the primary filter element 20.

[0088] In some embodiments, such as Figures 10 to 14 As shown, the air handling unit 1 also includes a first bracket 70. A primary filter element 20 is disposed on the first bracket 70, and the primary filter element 20 is detachably connected to the front housing 60 via the first bracket 70.

[0089] like Figure 11 , Figure 12 and Figure 13 As shown, the first support 70 can be a frame structure made of engineering plastic or alloy material. The first support 70 can be integrally formed with the primary filter element 20. The first support 70 can provide structural support for the primary filter element 20 so that the filter cavity 201 of the primary filter element 20 maintains its initial shape.

[0090] The outer edge of the first bracket 70 may be provided with a connector to allow for detachable assembly with the front housing 60. For example, as shown... Figure 11 , Figure 13 As shown, the first bracket 70 can be equipped with an elastic buckle 702. A corresponding slot 603 is provided on the inner wall of the front housing 60. When the first bracket 70 is inserted into the receiving cavity 601 of the front housing 60, the elastic buckle 702 is compressed and deformed until it aligns with the slot 603, at which point it automatically springs up and locks the first bracket 70 to the housing 10. During disassembly, the user can press the elastic buckle 702 to disengage it from the slot 603, thus separating the first bracket 70 along with the primary filter element 20 from the front housing 60.

[0091] In some embodiments, such as Figure 14 As shown, the first support 70 and the primary filter element 20 can be an integral injection-molded structure, thereby further improving the convenience of disassembly and assembly.

[0092] For example, such as Figure 12 As shown, a first magnetic element can be embedded in the first bracket 70. A second magnetic element is provided at the corresponding position on the front shell 60, and the first bracket 70 together with the primary filter element 20 is positioned and fixed to the front shell 60 through magnetic attraction.

[0093] Thus, the first bracket 70 can provide structural support for the primary filter element 20 to prevent it from deforming or shifting under the impact of airflow. The first bracket 70 can also be detachably connected to the front housing 60. After the user opens the front housing 60, the separation or assembly of the first bracket 70 and the primary filter element 20 from the front housing 60 can be completed with simple operations, improving the maintenance convenience of the air handling equipment 1.

[0094] In some embodiments, such as Figure 5 , Figure 11 and Figure 12 As shown, the front shell 60 is provided with a first ventilation opening 602 that communicates with the external environment. The first ventilation opening 602 is connected to the air inlet 202, or the first ventilation opening 602 is provided corresponding to the air inlet 202.

[0095] The front shell 60 is provided with a first vent 602, which not only realizes the structural protection of the primary filter element 20 by the front shell 60, but also does not affect the airflow through the air inlet 202 and the first vent 602 to enter the primary filter element 20 and realize the filtration function of the primary filter element 20.

[0096] like Figure 5 and Figure 12 As shown, the first vent 602 is located on the front of the front housing 60, and the air inlet 202 of the primary filter 20 also corresponds to the first vent 602 and is located on the front side of the primary filter 20. The front of the first bracket 70 may be provided with a second vent 702 to avoid the air inlet 202, so that the airflow enters the air inlet 202 through the first vent 602 and the second vent 702.

[0097] like Figure 11 As shown, the first vent 602 is located on the side of the front housing 60, and the air inlet 202 of the primary filter 20 also corresponds to the first vent 602 and is located on the side of the primary filter 20. A second vent 702 may be provided on the side of the first bracket 70 to avoid the air inlet 202, so that airflow enters the air inlet 202 through the first vent 602 and the second vent 702.

[0098] In some embodiments, such as Figure 15 As shown, the air handling unit 1 also includes a second support 50. The primary filter element 20 is disposed on the second support 50. The second support 50 can provide structural support for the primary filter element 20 so that the filter cavity 201 of the primary filter element 20 maintains its initial shape.

[0099] The primary filter element 20 is detachably connected to the housing 10 or the secondary filter element 30 via the second bracket 50. Exemplarily, the second bracket 50 includes a frame and a grid strip connected to the frame, and the frame is provided with a mounting portion that can be detachably connected to the housing 10 or the secondary filter element 30.

[0100] The second bracket 50 can be detachably connected to the housing 10 or the secondary filter element 30 by means of snap-fit, magnetic attachment, plug-in, or quick-release screw.

[0101] For example, the second bracket 50 may include a first buckle, and the housing 10 may be provided with a second buckle. By engaging or disengaging the first buckle and the second buckle, the second bracket 50 and the housing 10 can be assembled or disassembled.

[0102] For example, the edge of the second bracket 50 may be provided with a first magnetic element, and the corresponding position of the secondary filter element 30 may be provided with a second magnetic element. Through the magnetic attraction between the first and second magnetic elements, the primary filter element 20 and the secondary filter element 30 can be quickly positioned and fixed. When disassembly is required, the user only needs to apply appropriate pulling force to separate the primary filter element 20 from the secondary filter element 30; the operation is simple and requires no tools.

[0103] In this way, the primary filter element 20 is detachably connected to the housing 10 or the secondary filter element 30 via the second bracket 50, allowing the primary filter element 20 to be disassembled and maintained independently. Users can clean or replace the primary filter element 20 regularly according to actual usage without disassembling the entire air handling unit 1, thus improving maintenance convenience.

[0104] In some embodiments, such as Figure 15 As shown, the second bracket 50 and the primary filter element 20 are integrally injection molded. Users can hold the second bracket 50 to remove or install the primary filter element 20, improving the ease of disassembly.

[0105] In some embodiments, the primary filter 20 and the second support 50 are exterior components of the air handling unit 1. That is, at least a portion of the primary filter 20 and at least a portion of the second support 50 are visible to the user. Specifically, the side of the primary filter 20 facing away from the secondary filter 30 is externally visible, and the primary filter 20 may be located on the side of the air handling unit 1.

[0106] In this way, users can directly observe the degree of contamination of the primary filter element 20 (such as the accumulation of hair and dust) and determine whether the primary filter element 20 needs cleaning without opening the casing 10.

[0107] Furthermore, the primary filter element 20 and the second bracket 50 serve as exterior components, eliminating the need for the front cover plate of the air handling equipment 1 in related technologies, reducing the number of structural components in the air handling equipment 1, and improving the integration level of the air handling equipment 1.

[0108] In some embodiments, such as Figure 3As shown, the air handling unit 1 also includes a seal 80. The seal 80 is disposed between the primary filter 20 and the secondary filter 30.

[0109] The seal 80 can be an annular elastomer, surrounding the edge of the outlet surface 203 of the primary filter 20 or the edge of the secondary filter 30. When the primary filter 20 is installed in place, the seal 80 is deformed under pressure and tightly fits the edge of the inlet side of the secondary filter 30, forming a continuous sealing interface. This effectively prevents unfiltered airflow from leaking through the gap between the primary filter 20 and the secondary filter 30, allowing as much airflow as possible from the primary filter 20 to be filtered by the secondary filter 30.

[0110] The sealing element 80 is disposed between the edge of the primary filter element 20 and the edge of the secondary filter element 30. It can ensure the airflow between the primary filter element 20 and the secondary filter element 30 while maintaining the sealing between them, thus preventing unfiltered airflow from leaking through the gap between them.

[0111] In some embodiments, such as Figure 6 As shown, the side of the housing 10 has an opening 102, and the secondary filter element 30 is embedded in the opening 102 and detachably installed with the housing 10.

[0112] The housing 10 has an opening 102 on its side, and the secondary filter element 30 is embedded in the opening 102 and detachably installed with the housing 10. The shape of the opening 102 matches the shape of the secondary filter element 30, and the edge is provided with a guide structure to facilitate the insertion of the secondary filter element 30 in a predetermined direction.

[0113] When the secondary filter element 30 is installed in place, the edge of the secondary filter element 30 forms a tight fit with the opening 102, thereby improving the airflow pass-through rate of the secondary filter element 30.

[0114] The secondary filter element 30 is tightly fitted with the opening 102. After removing the primary filter element 20, the user can remove and replace the secondary filter element 30 from the side of the air handling unit 1 without disassembling other parts, thus improving the maintenance convenience of the air handling unit 1.

[0115] In some embodiments, such as Figure 4 , Figure 5 , Figures 5 to 8 As shown, the air outlet 101 is located at the top of the housing 10. Placing the air outlet 101 at the top of the housing 10 can increase the head of the purified airflow, giving the purified airflow greater upward momentum, thereby promoting air circulation in the indoor environment and improving the overall purification efficiency.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A primary filter element, characterized in that, The primary filter element is used in air handling equipment. The primary filter includes an air inlet and a filter cavity communicating with the air inlet, the filter cavity being used to collect pollutants.

2. The primary filter element according to claim 1, characterized in that, The primary filter element has a cavity bottom surface for receiving pollutants, and the air inlet is disposed away from the cavity bottom surface at a predetermined distance; or The primary filter element has a cavity bottom surface for receiving pollutants, and the air inlet is disposed on the cavity bottom surface. The primary filter element also includes an air damper disposed at the air inlet; or The edge of the air inlet is provided with a support.

3. An air handling device, characterized in that, include: The housing is provided with an air outlet; A primary filter element, wherein the primary filter element is the primary filter element as described in claim 1 or 2; A secondary filter element is disposed in the housing. The secondary filter element is plate-shaped and located on the air outlet side of the primary filter element. The filtration accuracy of the secondary filter element is higher than that of the primary filter element. A fan is disposed in the housing, and the fan is used to drive airflow from the air inlet of the primary filter element through the filter cavity of the primary filter element to the air outlet.

4. The air handling equipment according to claim 3, characterized in that, The primary filter includes an air outlet surface, which is planar and opposite to the secondary filter, and the air inlet is recessed to the air outlet surface.

5. The air handling equipment according to claim 3, characterized in that, The air handling equipment also includes: A front housing is detachably connected to the housing, the front housing includes a receiving cavity, and the primary filter element is detachably disposed within the receiving cavity; The front shell is provided with a first ventilation opening, which is connected to the external environment and the air inlet.

6. The air handling equipment according to claim 5, characterized in that, The air handling equipment also includes: A first support is provided, and the primary filter element is disposed on the first support. The primary filter element is detachably connected to the front shell through the first support.

7. The air handling equipment according to claim 6, characterized in that, The first bracket is provided with a second ventilation opening, which is provided in correspondence with the first ventilation opening and the air inlet.

8. The air handling equipment according to claim 3, characterized in that, The air handling equipment also includes: The second bracket is provided with the primary filter element, which is detachably connected to the housing or the secondary filter element via the second bracket.

9. The air handling equipment according to claim 8, characterized in that, The second support and the primary filter element are an integral structure; and / or The second bracket and the primary filter are exterior components of the air handling equipment.

10. The air handling apparatus according to any one of claims 3 to 9, characterized in that, The air handling equipment also includes: A sealing element is disposed between the primary filter element and the secondary filter element, wherein the sealing element is disposed at the edge of the primary filter element or the edge of the secondary filter element.

11. The air handling apparatus according to any one of claims 3 to 9, characterized in that, The side of the housing has an opening, and the secondary filter element is embedded in the opening and detachably installed with the housing; The air outlet is located at the top of the housing.

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