Humidifying and filtering device

Abstract

The utility model relates to the technical field of filters, and discloses a humidifying and filtering device. The humidifying and filtering device comprises a shell and a filtering piece; both the first filter layer and the second filter layer are microporous filter membranes, the first filter layer has hydrophilicity, and the second filter layer has hydrophobicity; the second filter layer is arranged around the first filter layer; the two ends of the first filtering layer abut against the top wall and the bottom wall of the containing cavity respectively, and a first space is defined by the first filtering layer and the top wall and the bottom wall of the containing cavity; the two ends of the second filtering layer abut against the top wall and the bottom wall of the containing cavity respectively, and a second space is defined by the second filtering layer and the side wall of the containing cavity; the first through opening is communicated with the first space, and the second through opening is communicated with the second space. The first filter layer and the second filter layer are both microporous filter membranes, and gas can take away water in the second space in a manner of taking away water vapor, so that the gas discharged from the first port is relatively wet, and the feeling of a user in inhaling the gas is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a humidifying filter device. Background Art

[0002] In modern clinical medicine, a ventilator is a crucial medical device that can prevent and treat respiratory failure, reduce complications, and save and extend the lives of patients.

[0003] Existing ventilators usually need to use multiple filter devices to filter air multiple times to achieve the effect of clean air. However, in the actual use process, after filtering the gas multiple times, it is inevitable to exclude the water vapor in the air, making the filtered gas relatively dry and resulting in a poor feeling for the user when inhaling the gas. Summary of the Utility Model

[0004] The utility model provides a humidifying filter device to solve the problem that the filtered gas is relatively dry, resulting in a poor feeling for the user when inhaling the gas.

[0005] To achieve the above object, the utility model provides the following technical solutions: A humidifying filter device, comprising: a housing provided with a receiving cavity, a first through port, and a second through port; there are two of each of the first through port and the second through port; the two first through ports are respectively communicated with the top wall and the bottom wall of the receiving cavity, and the two second through ports are both communicated with the side wall of the receiving cavity; a filter element disposed in the receiving cavity; the filter element is cylindrical; the filter element includes a first filter layer and a second filter layer; both the first filter layer and the second filter layer are microporous filter membranes, the first filter layer has hydrophilicity, and the second filter layer has hydrophobicity; both the first filter layer and the second filter layer are cylindrical, and the second filter layer surrounds the first filter layer; both ends of the first filter layer are respectively abutted against the top wall and the bottom wall of the receiving cavity, and a first space is defined between the first filter layer and the top wall and the bottom wall of the receiving cavity; both ends of the second filter layer are respectively abutted against the top wall and the bottom wall of the receiving cavity, and a second space is defined between the second filter layer and the side wall of the receiving cavity; the first through port is communicated with the first space, and the second through port is communicated with the second space.

[0006] In a possible implementation manner, the filter element is provided with a plurality of protruding portions protruding in a direction away from the central axis of the filter element, and the plurality of protruding portions are arranged at intervals in sequence around the central axis of the filter element, and a groove is defined between two adjacent protruding portions.

[0007] In a possible implementation manner, the plurality of protruding portions are all abutted against the side wall of the receiving cavity.

[0008] In a possible implementation, it further includes a central rod disposed within the first space; both ends of the central rod are in contact with the top wall and the bottom wall of the accommodation cavity respectively. The central rod is provided with a first channel and a first opening. There are two first channels which are respectively disposed at both ends of the central rod, and the two first channels are respectively communicated with the two first through openings; the first opening is disposed on the side wall of the central rod, and there are at least two first openings which are respectively communicated with the two first channels.

[0009] In a possible implementation, the filter element is disposed around the central rod and is in contact with the peripheral side of the central rod.

[0010] In a possible implementation, there are multiple first openings, and the multiple first openings are respectively communicated with the two first channels and are arranged at intervals around the central axis of the central rod.

[0011] In a possible implementation, the filter element further includes a first protective layer and a second protective layer, and both the first protective layer and the second protective layer are cylindrical; the first protective layer is disposed on the side of the first filter layer away from the second filter layer, and the first filter layer is disposed around the first protective layer; the second protective layer is disposed on the side of the second filter layer away from the first filter layer, and the second protective layer is disposed around the second filter layer; both the first protective layer and the second protective layer are made of microporous materials.

[0012] In a possible implementation, the first protective layer, the first filter layer, the second filter layer and the second protective layer are integrally formed and are stacked in sequence along the direction away from the central axis of the central rod.

[0013] In a possible implementation, the housing includes a shell body and a cover body. The shell body is provided with an upper and lower through hole. There are two cover bodies which are respectively disposed on the upper end and the lower end of the shell body, and the shell body and the two cover bodies define the accommodation cavity; the two first through openings are respectively disposed on the two cover bodies, and the two second through openings are both disposed on the side wall of the shell body; both ends of the first filter layer are in contact with the two cover bodies respectively, and both ends of the second filter layer are in contact with the two cover bodies respectively.

[0014] In a possible implementation, the length of the filter element is equal to the distance between the two cover bodies.

[0015] Compared with the prior art, the utility model has the following beneficial effects: In the embodiment of the utility model, water can be input into the second space from one of the second through-ports, and the water in the second space can be discharged from the other second through-port. A first filter layer and a second filter layer in the shape of a cylinder are arranged in the accommodation cavity, and the second filter layer surrounds the first filter layer. The second filter layer has hydrophobicity, and through the second filter layer, the water in the second space can be blocked from directly entering the first space, avoiding the water in the second space from being discharged from the first through-port; and since both the first filter membrane and the second filter layer are microporous filter membranes, the water vapor in the second space can sequentially pass through the second filter layer and the first filter membrane. The first filter layer has hydrophilicity, so that the first filter layer can retain the water vapor, playing a role in continuously moistening the first filter layer; gas can be input into the accommodation cavity from one of the first through-ports. After the gas in the first space contacts the first filter layer, it can take away the water vapor on the first filter layer, and the gas in the first space can enter the second space from the first filter layer and the second filter layer, enabling the gas to contact the water. When the gas in the first space and the second space is discharged from the other first through-port, since both the first filter layer and the second filter layer are microporous filter membranes, the gas can take away the water vapor, making the gas discharged from the first through-port relatively moist, so as to improve the feeling of the user inhaling the gas.

[0016] The utility model has other characteristics and advantages, which will be obvious from the accompanying drawings incorporated herein and the subsequent specific embodiments, or will be described in detail in the accompanying drawings incorporated herein and the subsequent specific embodiments. These accompanying drawings and specific embodiments are used together to explain the specific principles of the utility model. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of a humidifying and filtering device provided by an embodiment of the present utility model;

[0019] Figure 2 It is a cross-sectional view of a humidifying and filtering device provided by an embodiment of the present utility model;

[0020] Figure 3 It is a partial cross-sectional view of a humidifying and filtering device provided by an embodiment of the present utility model;

[0021] Figure 4A cross-sectional view of the housing and the filter element of a humidifying and filtering device provided by an embodiment of the present utility model;

[0022] Figure 5 A schematic structural diagram of the filter element of a humidifying and filtering device provided by an embodiment of the present utility model;

[0023] Figure 6 A schematic structural diagram of the central rod of a humidifying and filtering device provided by an embodiment of the present utility model;

[0024] Figure 7 A cross-sectional view of the housing of a humidifying and filtering device provided by an embodiment of the present utility model.

[0025] Reference numerals:

[0026] Housing 100; First through-port 101; Second through-port 102; Accommodation cavity 103; Annular groove 104; Housing body 110; Cover body 120; Filter element 200; First space 201; Second space 202; Protruding portion 203; Groove 204; First filter layer 210; Second filter layer 220; First protective layer 230; Second protective layer 240; Central rod 300; First channel 310; First opening 320. Detailed implementation manners

[0027] To describe in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects, etc. of the present application, the following is described in detail in conjunction with the specific embodiments listed and the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.

[0028] Referring to "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing in various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0029] Unless otherwise defined, the meanings of the technical terms used in this article are the same as those generally understood by those skilled in the technical field to which the present application belongs; the use of the relevant terms in this article is only for describing specific embodiments and is not intended to limit the present application.

[0030] In the description of the present application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this text generally represents an "or" logical relationship between the associated objects before and after.

[0031] In the present application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantitative, primary-secondary, or sequential relationships between these entities or operations.

[0032] Without further limitations, in the present application, the expressions "include", "comprise", "have", or other similar expressions used in a statement are intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method, or product that includes the said elements. Thus, a process, method, or product that includes a series of elements may not only include those defined elements, but also include other elements not explicitly listed, or elements inherent to such a process, method, or product.

[0033] Similar to the understanding in the "Examination Guidelines", in the present application, expressions such as "greater than", "less than", "exceeding", etc. are understood not to include the number itself; expressions such as "above", "below", "within", etc. are understood to include the number itself. In addition, in the description of the embodiments of the present application, the meaning of "a plurality of" is two or more (including two). Similar expressions related to "many", such as "multiple groups", "multiple times", etc., are understood in the same way, unless otherwise specifically defined.

[0034] In the description of the embodiments of the present application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiment or the drawing. It is only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present application.

[0035] Unless otherwise clearly specified or defined, in the description of the embodiments of the present application, terms such as "installed", "connected", "joined", "fixed", "set" should be understood in a broad sense. For example, the "connection" may be a fixed connection, a detachable connection, or an integral setting; it may be a mechanical connection, an electrical connection, or a communication connection; it may be a direct connection, or an indirect connection through an intermediate medium; it may be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art to which the present application pertains, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0036] Reference is made below to Figures 1 to 7 Describe a humidifying and filtering device according to an embodiment of the present invention.

[0037] A humidifying and filtering device according to an embodiment of the present invention, the humidifying and filtering device includes a housing 100 and a filter element 200; the housing 100 is provided with a receiving cavity 103, a first through port 101 and a second through port 102; there are two first through ports 101 and two second through ports 102; the two first through ports 101 are respectively communicated with the top wall and the bottom wall of the receiving cavity 103, and the two second through ports 102 are both communicated with the side wall of the receiving cavity 103; the filter element 200 is arranged in the receiving cavity 103; the filter element 200 is cylindrical; the filter element 200 includes a first filter layer 210 and a second filter layer 220; both the first filter layer 210 and the second filter layer 220 are microporous filter membranes, the first filter layer 210 has hydrophilicity, and the second filter layer 220 has hydrophobicity; both the first filter layer 210 and the second filter layer 220 are cylindrical, and the second filter layer 220 surrounds the first filter layer 210; both ends of the first filter layer 210 are respectively abutted against the top wall and the bottom wall of the receiving cavity 103, and the first filter layer 210 and the top wall and the bottom wall of the receiving cavity 103 define a first space 201; both ends of the second filter layer 220 are respectively abutted against the top wall and the bottom wall of the receiving cavity 103, and the second filter layer 220 and the side wall of the receiving cavity 103 define a second space 202; the first through port 101 is communicated with the first space 201, and the second through port 102 is communicated with the second space 202.

[0038] In the embodiment of the present utility model, water can be input into the second space 202 from one of the second ports 102, and the water in the second space 202 can be discharged from the other second port 102. A cylindrical first filter layer 210 and a second filter layer 220 are arranged in the accommodation cavity 103. The second filter layer 220 is arranged around the first filter layer 210. The second filter layer 220 has hydrophobicity. Through the second filter layer 220, the water in the second space 202 can be blocked from directly entering the first space 201, avoiding the water in the second space 202 from being discharged from the first port 101. Since both the first filter membrane 210 and the second filter layer 220 are microporous membranes, the water vapor in the second space 202 can sequentially pass through the second filter layer 220 and the first filter membrane 210. The first filter layer 210 has hydrophilicity, enabling the first filter layer 210 to retain the water vapor, so as to continuously moisten the first filter layer 210. Gas can be input into the accommodation cavity 103 from one of the first ports 101. The gas in the first space 201 can take away the water vapor on the first filter layer 210 after contacting the first filter layer 210, and the gas in the first space 201 can enter the second space from the first filter layer 210 and the second filter layer 220, enabling the gas to contact the water. When the gas in the first space 201 and the second space 202 is discharged from the other first port 101, since both the first filter layer 210 and the second filter layer 220 are microporous membranes, the gas can take away the water in the second space 202 in the way of taking away the water vapor, making the gas discharged from the first port 101 relatively moist, so as to improve the feeling of the user inhaling the gas.

[0039] Specifically, the water in the second space 202 of the housing 100 of the humidifying and filtering device can enter the first space 201 in the form of water vapor. The first filter layer 210 and the second filter layer 220 play a filtering effect on the permeating water vapor, so as to avoid large particulate matter in the water from entering the first space 201, making the relatively dry gas introduced from the first port 101 moist.

[0040] Specifically, the first filter layer 210 is a hydrophilic microporous membrane, and the first filter layer 210 can be made of polyethersulfone, polysulfone or nylon; the second filter layer 220 is a hydrophobic microporous membrane, and the second filter layer 220 can be made of polytetrafluoroethylene, polyester or polyethylene.

[0041] Referring to Figure 5 , it can be understood that the filter element 200 is provided with a plurality of protruding portions 203 protruding in a direction away from the central axis of the filter element 200. The plurality of protruding portions 203 are arranged at intervals in sequence around the central axis of the filter element 200, and a groove 204 is defined between two adjacent protruding portions 203.

[0042] By providing the protrusions 203, the surface area of the filter element 200 can be increased, so as to increase the contact area between the filter element 200 and the water and gas in the accommodation cavity 103, improve the effect of filtering water vapor, and increase the amount of water vapor entering the first filter membrane 210 to better moisten the first filter membrane 210. Among them, the protrusions 203 provided on the peripheral side of the filter element 200 are in a corrugated structure; the axial direction of the central axis of the filter element 200 is set in the same direction as the length direction of the filter element 200.

[0043] A groove 204 is defined between two adjacent protrusions 203, and water and gas can flow in the groove 204 to reduce the difficulty of water and gas flowing between multiple protrusions 203; the filter element 200 is a corrugated filter structure.

[0044] Specifically, the peripheral sides of the first protective layer 230 and the second protective layer 240 are both corrugated. The filter membrane can be folded by a pleating device to a height of 6 mm to 15 mm and rolled into a cylindrical shape and then cut into any available length of 80 mm to 120 mm.

[0045] Referring to Figures 2 to 4 and

[0046] Specifically, the accommodation cavity 103 is a cylindrical cavity structure.

[0047] Referring to Figure 2 and Figure 3 and

[0048] Gas can enter the first space 201 through one of the first ports 101. The gas flows through the first channel 310 and exits from the first opening 320. Since both ends of the central rod 300 are in contact with the top wall and the bottom wall of the accommodation cavity 103 respectively, and the first opening 320 is provided on the side wall of the central rod 300, the gas flowing in from the first port 101 can change the incoming flow direction when flowing through the first channel 310 and the first opening 320, so that the gas can flow towards the first filter layer 210 and the second filter layer 220, enabling more gas to enter the second space 202 to fully moisten the gas. Specifically, the central rod 300 is cylindrical, and the central axis of the central rod 300 is coaxially arranged with the central axis of the filter element 200.

[0049] Both ends of the central rod 300 are in contact with the top wall and the bottom wall of the accommodation cavity 103 respectively, so as to reduce the gas flowing in between both ends of the central rod 300 and the top wall and the bottom wall of the accommodation cavity 103, and improve the effect of moistening the gas.

[0050] Referring to Figure 2 and Figure 3 , it can be understood that the filter element 200 is arranged around the central rod 300 and is in contact with the peripheral side of the central rod 300, so as to be able to define the position of the filter element 200 through the central rod 300 and reduce the degree of the flowing gas and water pushing the filter element 200 to move in the accommodation cavity 103.

[0051] Specifically, the filter element 200 is a cylindrical structure, and the inner side of the filter element 200 is in contact with the outer peripheral side of the central rod 300. Among them, the filter element 200 is provided with a plurality of protruding portions 203 protruding in a direction away from the central axis of the filter element 200, and the plurality of protruding portions 203 are arranged at intervals in sequence around the central axis of the filter element 200, so that a part of the inner side of the filter element 200 is in contact with the outer peripheral side of the central rod 300.

[0052] Referring to Figure 3 and Figure 6 , it can be understood that there are a plurality of first openings 320, and the plurality of first openings 320 are respectively communicated with the two first channels 310 and are arranged at intervals around the central axis of the central rod 300.

[0053] By providing a plurality of first openings 320, the flow rate of the gas entering from the first port 101 into the accommodation cavity 103 can be increased, so as to improve the efficiency of moistening the gas.

[0054] Specifically, a plurality of first openings 320 are respectively at both end portions of the central rod 300. The first openings 320 located at both end portions of the central rod 300 are respectively communicated with two first channels 310; the plurality of first openings 320 are arranged at intervals around the central axis of the central rod 300, and are arranged in multiple rows along the axial direction of the central axis of the central rod 300, so that the inner wall of the first filter layer 210 is arranged opposite to the plurality of first openings 320 to improve the efficiency of wetting the gas.

[0055] Referring to Figures 3 to 5 , it can be understood that the filter element 200 further includes a first protective layer 230 and a second protective layer 240. Both the first protective layer 230 and the second protective layer 240 are cylindrical; the first protective layer 230 is arranged on the side of the first filter layer 210 away from the second filter layer 220, and the first filter layer 210 is arranged around the first protective layer 230; the second protective layer 240 is arranged on the side of the second filter layer 220 away from the first filter layer 210, and the second protective layer 240 is arranged around the second filter layer 220; both the first protective layer 230 and the second protective layer 240 are made of microporous materials.

[0056] By providing the first protective layer 230 and the second protective layer 240, the effects of protecting the first filter layer 210 and the second filter layer 220 can be achieved, and damage to the first filter layer 210 and the second filter layer 220 caused by large-particle impurities during use can be reduced; and both the first protective layer 230 and the second protective layer 240 are made of microporous materials so that water and gas can pass through the first protective layer 230 and the second protective layer 240.

[0057] Specifically, both the upper and lower ends of the first protective layer 230 and the second protective layer 240 are in contact with the top wall and the bottom wall of the accommodation cavity 103 to ensure the protection effect.

[0058] Specifically, both the first protective layer 230 and the second protective layer 240 are made of polypropylene long fibers.

[0059] Referring to Figure 3 and Figure 5 , it can be understood that the first protective layer 230, the first filter layer 210, the second filter layer 220 and the second protective layer 240 are integrally formed and are sequentially stacked in a direction away from the central axis of the central rod 300, so as to reduce the volume of the filter element 200 in the accommodation cavity 103, so that more water and gas can be accommodated in the accommodation cavity 103.

[0060] Referring to Figure 1 and Figure 7, it can be understood that the outer shell 100 includes a housing 110 and a cover 120. The housing 110 is provided with an upper and lower through hole. There are two covers 120 which are respectively disposed on the upper end and the lower end of the housing 110. The housing 110 and the two covers 120 define an accommodation cavity 103; two first through ports 101 are respectively disposed on the two covers 120, and two second through ports 102 are both disposed on the side wall of the housing 110; both ends of the first filter layer 210 are respectively abutted against the two covers 120, and both ends of the second filter layer 220 are respectively abutted against the two covers 120.

[0061] Specifically, an annular groove 104 is provided on the inner side of the housing 110. The annular groove 104 extends around the central axis of the central rod 300. There are two annular grooves 104 which are respectively communicated with the two second through ports 102.

[0062] Specifically, the filter element 200 can be hermetically connected to the two end covers by a hot melt welding process, and the two end covers can be hermetically connected to the housing 110 by a hot melt welding process.

[0063] Referring to Figure 2 , it can be understood that the length of the filter element 200 is equal to the distance between the two covers 120, so that both ends of the upper end of the filter element 200 can be respectively abutted against the two covers 120.

[0064] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of the present application, the patent protection scope of the present application cannot be limited thereby. Any technical solution obtained by equivalent structure or equivalent process substitution or modification based on the essential concept of the present application and using the content recorded in the text and drawings of the specification of the present application, as well as any technical solution directly or indirectly implementing the above embodiments in other related technical fields, etc., are all included in the patent protection scope of the present application.

Claims

1. Humidifying filter device, characterized in that, Comprising: A housing (100) provided with a receiving cavity (103), a first through port (101) and a second through port (102); there are two of each of the first through port (101) and the second through port (102); the two first through ports (101) are respectively communicated with the top wall and the bottom wall of the receiving cavity (103), and the two second through ports (102) are both communicated with the side wall of the receiving cavity (103); A filter element (200) disposed in the receiving cavity (103); the filter element (200) is cylindrical; the filter element (200) includes a first filter layer (210) and a second filter layer (220); both the first filter layer (210) and the second filter layer (220) are microporous membranes, the first filter layer (210) has hydrophilicity, and the second filter layer (220) has hydrophobicity; both the first filter layer (210) and the second filter layer (220) are cylindrical, and the second filter layer (220) is disposed around the first filter layer (210); both ends of the first filter layer (210) are respectively abutted against the top wall and the bottom wall of the receiving cavity (103), and a first space (201) is defined between the first filter layer (210) and the top wall and the bottom wall of the receiving cavity (103); both ends of the second filter layer (220) are respectively abutted against the top wall and the bottom wall of the receiving cavity (103), and a second space (202) is defined between the second filter layer (220) and the side wall of the receiving cavity (103); the first through port (101) is communicated with the first space (201), and the second through port (102) is communicated with the second space (202).

2. The humidifying and filtering device according to claim 1, wherein The filter element (200) is provided with a plurality of protruding portions (203) protruding in a direction away from the central axis of the filter element (200), and the plurality of protruding portions (203) are arranged at intervals in sequence around the central axis of the filter element (200), and a groove (204) is defined between two adjacent protruding portions (203).

3. The humidifying and filtering device according to claim 2, characterized in that, All of the plurality of protruding portions (203) are abutted against the side wall of the receiving cavity (103).

4. The humidifying and filtering device according to claim 1, wherein It further includes a central rod (300), and the central rod (300) is disposed in the first space (201); both ends of the central rod (300) are respectively abutted against the top wall and the bottom wall of the receiving cavity (103), the central rod (300) is provided with a first channel (310) and a first opening (320), there are two first channels (310) and they are respectively disposed at both ends of the central rod (300), and the two first channels (310) are respectively communicated with the two first through ports (101); the first opening (320) is disposed on the side wall of the central rod (300), and there are at least two first openings (320) and they are respectively communicated with the two first channels (310).

5. The humidifying and filtering device according to claim 4, wherein The filter element (200) is disposed around the central rod (300) and abuts against the peripheral side of the central rod (300).

6. The humidifying and filtering device according to claim 4, wherein, A plurality of the first openings (320) are provided, and the plurality of the first openings (320) are respectively communicated with the two first channels (310) and are arranged at intervals around the central axis of the central rod (300).

7. The humidifying and filtering device according to claim 4, characterized in that, The filter element (200) further includes a first protective layer (230) and a second protective layer (240), and both the first protective layer (230) and the second protective layer (240) are cylindrical; the first protective layer (230) is arranged on a side of the first filter layer (210) away from the second filter layer (220), and the first filter layer (210) is arranged around the first protective layer (230); the second protective layer (240) is arranged on a side of the second filter layer (220) away from the first filter layer (210), and the second protective layer (240) is arranged around the second filter layer (220); both the first protective layer (230) and the second protective layer (240) are made of microporous materials.

8. The humidifying and filtering device according to claim 7, characterized in that, The first protective layer (230), the first filter layer (210), the second filter layer (220) and the second protective layer (240) are integrally formed and are sequentially stacked in a direction away from the central axis of the central rod (300).

9. The humidifying and filtering device according to claim 1, wherein The housing (100) includes a housing body (110) and a cover body (120), the housing body (110) is vertically through, two cover bodies (120) are provided and are respectively covered on the upper end and the lower end of the housing body (110), and the housing body (110) and the two cover bodies (120) define the accommodation cavity (103); two of the first through openings (101) are respectively arranged on the two cover bodies (120), and two of the second through openings (102) are both arranged on the side wall of the housing body (110); two ends of the first filter layer (210) are respectively abutted against the two cover bodies (120), and two ends of the second filter layer (220) are respectively abutted against the two cover bodies (120).

10. The humidifying and filtering device according to claim 9, wherein, The length of the filter element (200) is equal to the distance between the two cover bodies (120).

Images