Cooling fan

Abstract

The utility model relates to the technical field of household appliances, and discloses a cooling fan which comprises a shell, a water tank is arranged in the shell, a top cover is arranged on the shell, an installation space is arranged on the top cover, and a user can add water into the water tank through the installation space. The composite filtering assembly is detachably connected to the mounting space. The installation space is arranged on the top cover of the cooling fan, the composite filtering assembly is detachably connected to the installation space, a user can conveniently disassemble and replace the composite filtering assembly according to actual needs, and due to the fact that the installation space is a place where the user adds water into the water tank and is also a place where the user can easily touch the installation space, the user can conveniently replace the composite filtering assembly. The composite filter assembly is convenient to disassemble, assemble or replace by a user, the user can assemble the composite filter assembly in the mounting space according to actual requirements for different water qualities in different regions, the user can disassemble the composite filter assembly if the water quality is soft, and the user can conveniently disassemble and replace the composite filter assembly if the water quality is hard.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a cooling fan. Background Art

[0002] Compared with ordinary fans, cooling fans can make the air flow at a lower temperature, so they are becoming more and more popular in summer.

[0003] The water circulation system when the cooling fan is running consists of a water tank, a water pump assembly and a wet curtain evaporation system. During use, the water pump draws water from the water tank into the water distribution box on the top cover of the cooling fan. The water evenly falls from the water distribution box into the wet curtain evaporation system, forming a dense water film on the wet curtain. When air enters from the rear net, the water film will take away part of the heat in the air, thereby achieving a physical cooling effect.

[0004] Due to the difference in water quality in different regions, the water circulation system may have blockage problems during operation. On the one hand, impurities and particles contained in the water will accumulate in the water tank, and long-term accumulation will cause the water pump to be blocked; on the other hand, the unevaporated water in the wet curtain evaporation system will take away some of the impurities of the wet curtain when falling into the water tank below. When the water quality is too hard, water scaling often occurs.

[0005] In view of the above problems, the commonly used solution is to add ordinary filters. However, ordinary filters can only remove large particles of impurities in the water, but cannot remove calcium and magnesium ions in the water. After long-term use, the water channel will still be blocked by scaling. Some existing technologies also use ordinary filters in combination with high-efficiency filters to reduce the risk of water channel blockage. However, both ordinary filters and high-efficiency filters are directly installed inside the cooling fan during production, which is inconvenient for users to replace later. Utility Model Content

[0006] In view of this, the utility model provides a cooling fan to solve the problem in the prior art that the filter is installed inside the cooling fan and is inconvenient for users to replace.

[0007] The utility model provides a cooling fan, comprising:

[0008] A shell, wherein a water tank is arranged in the shell, and a top cover is arranged on the shell, and an installation space is arranged on the top cover, suitable for a user to add water into the water tank through the installation space;

[0009] The composite filter assembly is detachably connected to the installation space.

[0010] Beneficial effect: by setting an installation space on the top cover of the cooling fan, the composite filter assembly can be detachably connected to the installation space, which is more convenient for users to replace the composite filter assembly according to actual needs. Since the installation space is where users add water to the water tank and is also a place that users can easily reach, it is also more convenient for users to operate when disassembling or replacing the composite filter assembly. In addition, for different regions with different water quality, users can also determine whether to install the composite filter assembly in the installation space according to actual needs. If the water quality is soft, users can remove the composite filter assembly 4 from the cooling fan, that is, do not install the composite filter assembly 4. If the water quality is hard, users can install the composite filter assembly in the installation space on the top cover for a period of time and then replace the composite filter assembly. The operation is more convenient.

[0011] In an optional embodiment, the composite filter assembly is snap-fitted into the installation space.

[0012] In an optional embodiment, the composite filter assembly includes: a primary filter screen and a resin filter element, wherein the primary filter screen is arranged above the resin filter element, so that water added to the water tank by a user first passes through the primary filter screen and then passes through the resin filter element.

[0013] Beneficial effect: By configuring the composite filter assembly to include a primary filter and a resin filter element, and the primary filter element is arranged above the resin filter element, when the user adds water to the water tank, the water can first pass through the primary filter element, and filter out impurities, large particles and other dirt through the primary filter element, and then pass through the resin filter element for softening and purification before entering the water tank for water circulation, effectively preventing scaling from clogging the water path of the water circulation system. At the same time, the resin filter element is also relatively easy to regenerate. For example, the user can regenerate the resin through salt water after using it for a period of time, further extending the service life of the resin filter element.

[0014] In an optional embodiment, the composite filter assembly includes:

[0015] A filter box is detachably connected to the installation space, the filter box has a receiving space, and the resin filter element is arranged in the receiving space;

[0016] The filter box cover is detachably connected to the top of the filter box, and the primary filter is arranged on the filter box cover.

[0017] Beneficial effect: By configuring the composite filter assembly to include a filter box and a filter box cover, and the filter box is detachably connected to the installation space, and the filter box is detachably connected to the filter box cover, it is more convenient to replace the filter box and the filter box cover, and the primary filter is arranged on the filter box cover, and the resin filter element is arranged in the filter box. If the primary filter is damaged, or the resin filter element cannot be used any more, it is also very convenient to replace only one of them, and the other one does not need to be replaced, thereby reducing the cost of use.

[0018] In an optional embodiment, the filter box is snap-fitted to the installation space;

[0019] And / or, the filter box cover is snap-connected with the filter box.

[0020] In an optional embodiment, a first buckle is provided on the outer wall of the filter box, and a snap-in groove which is matched and connected with the first buckle is provided on the side wall of the installation space;

[0021] And / or, a second buckle is provided on the inner wall of the filter box, and a third buckle is provided on the filter box cover to cooperate with the second buckle.

[0022] In an optional embodiment, a first positioning structure is provided on the filter box, and a second positioning structure that is cooperatively connected to the first positioning structure is provided on the installation space.

[0023] Beneficial effect: By setting a first positioning structure on the filter box and setting a second positioning structure in cooperation with the first positioning structure on the installation space, it can play a guiding and pre-positioning role when assembling the filter box to the installation space, facilitating assembly and preventing the filter box from tilting and not being assembled in place during assembly.

[0024] In an optional embodiment, the first positioning structure is a groove, and the second positioning structure is a convex rib.

[0025] In an optional embodiment, a water adding portion is provided on the filter box cover, and the water adding portion is arranged at an angle.

[0026] Beneficial effect: By arranging an inclined water adding part on the filter box cover, it can guide the water when the user adds water, making it convenient for the user to add water into the filter box, and then enter the water circulation system for circulation after passing through the primary filter and the resin filter element.

[0027] In an optional embodiment, the cooling fan includes an ice crystal box, the ice crystal box is suitable for storing ice crystals, and the ice crystal box is arranged in the installation space and below the composite filter assembly;

[0028] And / or, the installation space is a installation groove.

[0029] Beneficial effect: By setting up an ice crystal box in the installation space, the added water can be cooled to a certain extent before being circulated, so that the water can take away more heat in the air, making the air blown by the cooling fan cooler and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is a schematic structural diagram of a cooling fan according to an embodiment of the utility model;

[0032] Figure 2 It is a structural schematic diagram of the top cover of the cooling fan;

[0033] Figure 3 It is a schematic diagram of the structure of the composite filter assembly of the cooling fan;

[0034] Figure 4 It is a structural schematic diagram of a resin filter element;

[0035] Figure 5 It is a structural schematic diagram of the filter box of the composite filter assembly;

[0036] Figure 6 It is a schematic diagram of the structure of the filter box cover of the composite filter assembly;

[0037] Figure 7 for Figure 6 A partial enlarged view of

[0038] Figure 8 It is a structural schematic diagram of the water circulation system of the cooling fan;

[0039] Fig. 9 It is a schematic diagram of the structure of the wet curtain.

[0040] Description of reference numerals:

[0041] 1-upper shell; 101-air inlet; 2-lower shell; 3-top cover; 301-installation slot; 302-control panel; 4-composite filter assembly; 401-primary filter; 402-resin filter element; 4021-resin particles; 403-filter box; 4031-first buckle; 4032-second buckle; 404-filter box cover; 4041-third buckle; 4042-water adding part; 5-ice crystal box; 6-wet curtain; 7-water supply pipe; 8-return water pipe; 9-water pump assembly; 10-moving wheel. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0043] The cooling fan in the prior art needs to flow water. Since the water quality in different regions is different, for areas with hard water, after a long period of use, water is easy to cause scaling and blockage of the water channel when circulating in the cooling fan. Although the prior art also uses a filter to filter the water, which can alleviate certain blockage problems, the filter is directly installed inside the cooling fan when the cooling fan is produced, and the filter is a consumable part, it is not easy for users to disassemble and replace it.

[0044] The applicant found that a cooling fan, especially a large-capacity cooling fan, can be filled with water from the top. The user can add water to the water tank inside the cooling fan from the top of the cooling fan. If the filter can be installed at the water filling place on the top of the cooling fan, it will be more convenient for the user to operate, and the water quality can be filtered, purified and softened. Based on this, the applicant proposed a cooling fan.

[0045] Combine the following Figures 1 to 9 , describing an embodiment of the utility model.

[0046] According to an embodiment of the utility model, a cooling fan is provided, comprising: a shell, a water tank is arranged in the shell, a top cover 3 is arranged on the shell, an installation space is arranged on the top cover 3, suitable for a user to add water to the water tank through the installation space; a composite filter assembly 4, which is detachably connected to the installation space.

[0047] By setting an installation space on the top cover 3 of the cooling fan, the composite filter assembly 4 can be detachably connected to the installation space, which is convenient for users to replace or disassemble the composite filter assembly 4 according to actual needs. Since the installation space is where the user adds water to the water tank and is also a place that the user can easily reach, it is convenient for users to operate when disassembling or replacing the composite filter assembly 4. Since the water quality in different regions is different, users can also determine whether to assemble the composite filter assembly 4 in the installation space according to actual needs. If the water quality is soft, users can remove the composite filter assembly 4 from the cooling fan, that is, do not install the composite filter assembly 4. If the water quality is hard, users can install the composite filter assembly 4 in the installation space on the top cover 3 for a period of time and then replace the composite filter assembly 4, which is convenient to operate.

[0048] The installation space on the top cover 3 is an installation slot 301. The composite filter assembly 4 in this embodiment is snap-fitted to the installation slot 301. As a convertible implementation, the composite filter assembly 4 may also be connected to the installation slot 301 by screws.

[0049] Specifically, the composite filter assembly 4 includes: a primary filter screen 401 and a resin filter element 402. The primary filter screen 401 is arranged above the resin filter element 402, so that the water added by the user to the water tank first passes through the primary filter screen 401 and then passes through the resin filter element 402. The primary filter screen 401 can be made of PET material. The upper and lower parts defined in this embodiment are the upper and lower parts during the actual use of the cooling fan.

[0050] The resin filter element 402 is a resin filter element for purifying water. The water purification principle of the resin filter element 402 is as shown in the following reaction equation. Calcium ions in water are prone to scaling. The resin filter element 402 absorbs calcium ions in water through a replacement reaction to achieve a water purification effect.

[0051]

[0052] By configuring the composite filter assembly 4 to include a primary filter screen 401 and a resin filter element 402, and the primary filter screen 401 is disposed above the resin filter element 402, when a user adds water to the water tank, the water can first pass through the primary filter screen 401, and impurities, large particles and other water-insoluble substances are first filtered through the primary filter screen 401, and then softened and purified by the resin filter element 402 before entering the water tank for evaporative cooling, thereby effectively preventing scaling from clogging the water path of the water circulation system. At the same time, the resin filter element 402 is also relatively easy to regenerate. For example, the user can regenerate the resin filter element 402 through salt water after using it for a period of time, thereby further extending the service life of the resin filter element 402.

[0053] like Figure 3 As shown, the composite filter assembly 4 includes: a filter box 403, which is detachably connected to the installation groove 301, and the filter box 403 has a receiving space, and a resin filter element 402 is arranged in the receiving space; a filter box cover 404, which is detachably connected to the top of the filter box 403, and a primary filter 401 is arranged on the filter box cover 404.

[0054] By configuring the composite filter assembly 4 to include a filter box 403 and a filter box cover 404, and the filter box 403 is detachably connected to the mounting slot 301, and the filter box 403 is detachably connected to the filter box cover 404, it is relatively convenient to replace the filter box 403 and the filter box cover 404, and the primary filter 401 is arranged on the filter box cover 404, and the resin filter element 402 is arranged in the filter box 403. If the primary filter 401 is damaged, or the resin filter element 402 cannot be used any more, it is also very convenient to replace only one of them, and the other one does not need to be replaced, thereby reducing the cost of use.

[0055] As a convertible embodiment, the resin filter element 402 and the primary filter screen 401 may be both disposed in the filter screen box 403. As a convertible embodiment, the filter screen box 403 and the filter screen box cover 404 may be integrally formed, the primary filter screen 401 and the resin filter element 402 may be both disposed in the box body, and an opening may be provided on the side wall of the filter screen box 403 to facilitate replacement of the primary filter screen 401 and the resin filter element 402.

[0056] The aperture of the primary filter 401 can be 0.27 mm, which completes the primary filtration of water and filters out large impurities and particulate matter that are insoluble in water. The primary filter 401 can be glued to the filter box cover 404. Of course, the primary filter 401 can also be fixedly connected to the filter box cover 404 in other ways, such as snap-on, etc., and there is no excessive restriction here.

[0057] like Figure 4 As shown, the resin filter element 402 in the filter box 403 includes a lot of resin particles 4021, the total amount of the resin particles 4021 can be 0.5L, and the diameter of the resin particles 4021 can be 3mm, completing the secondary filtration of the water and softening the water added to the water tank. The resin particles 4021 can absorb calcium and magnesium ions in the water, soften the water quality, and are not easy to scale.

[0058] Among them, the filter box 403 is snap-fitted with the installation slot 301; the filter box cover 404 is snap-fitted with the filter box 403. By snapping the filter box 403 with the installation slot 301 and the filter box cover 404 with the filter box 403, it is easy to disassemble and take out the resin filter element 402 for cleaning and recycling. As a convertible embodiment, the filter box 403 can also be screwed to the installation slot 301. As a convertible embodiment, the filter box cover 404 can also be screwed to the filter box 403.

[0059] like Figure 5 and Figure 6 As shown, the outer wall of the filter box 403 is provided with a first buckle 4031, and the side wall of the installation slot 301 is provided with a buckle groove that cooperates with the first buckle 4031; the inner wall of the filter box 403 is provided with a second buckle 4032, and the filter box cover 404 is provided with a third buckle 4041 that cooperates with the second buckle 4032. As a convertible embodiment, it is also possible that the outer wall of the filter box 403 is provided with a buckle groove, and the corresponding side wall of the installation slot 301 is provided with a buckle.

[0060] Specifically, first buckles 4031 are respectively provided on two opposite outer walls of the filter box 403 , two second buckles 4032 are provided on the inner wall of one side of the filter box 403 , and two third buckles 4041 are provided on the side wall of the filter box cover 404 corresponding to the second buckles 4032 .

[0061] like Figure 7 As shown, the third buckle 4041 includes a connecting portion and a hook portion, the upper end of the connecting portion is fixedly connected to the filter box cover 404, and the lower end of the connecting portion is fixedly connected to the hook portion. During assembly, the hook portion of the third buckle 4041 is clamped on the bottom end of the second buckle 4032.

[0062] In order to facilitate assembly and disassembly, the first buckle 4031, the second buckle 4032 and the third buckle 4041 are elastic buckles, so that the buckles are not easily damaged by the user when operating with external force.

[0063] The filter box 403 in this embodiment is provided with a first positioning structure, and the mounting groove 301 is provided with a second positioning structure that cooperates with and connects to the first positioning structure. Specifically, the first positioning structure is a groove, and the second positioning structure is a convex rib. There are no excessive restrictions on the specific number of the grooves and convex ribs, and they can be respectively provided at the ends of the filter box 403 and the mounting groove 301. As a convertible implementation, the first positioning structure can also be a convex rib and the second positioning structure can be a groove, or the first positioning structure and the second positioning structure can be a guide rail and a guide groove, respectively.

[0064] By setting a first positioning structure on the filter box 403 and setting a second positioning structure on the installation groove 301 to cooperate with the first positioning structure, when the filter box 403 is assembled to the installation groove 301, it can play a guiding and pre-positioning role, facilitate assembly, and prevent the filter box 403 from being tilted and not assembled in place during assembly.

[0065] Since the first buckle 4031 and the groove are provided on the outer wall of the filter box 403, in order to prevent interference when the filter box 403 is assembled into the installation slot 301, the first buckle 4031 can be set on the two sides of the filter box 403, and the groove is set at the end of the filter box 403. The side here can refer to the front and back direction in the drawings, and the end can refer to the left and right direction in the drawings. As a convertible embodiment, it is also possible that the first buckle 4031 and the groove are both set on the same side of the filter box 403, so that when the groove on the filter box 403 is aligned with the rib on the installation slot 301 and assembled in place, the first buckle 4031 is also clamped on the clamping groove, which is convenient for assembly.

[0066] like Figure 6As shown, a water adding part 4042 is provided on the filter box cover 404, and the water adding part 4042 is inclined. When the user adds water to the water tank, water can be added inward along the inclined water adding part 4042. Specifically, two water adding parts 4042 are provided. By providing an inclined water adding part 4042 on the filter box cover 404, it can guide the water when the user adds water, so that the user can add water to the filter box 403, and then enter the water circulation system for circulation after passing through the primary filter 401 and the resin filter element 402. As a convertible embodiment, it is also possible that the water adding part 4042 with an inclined structure is not separately provided on the filter box cover 404, but the water adding part 4042 is the water adding port above the filter box cover 404, and the side wall is in a vertical state. When the user adds water, water is added directly from the opening. As a convertible embodiment, it is also possible that one or more water adding parts 4042 are provided.

[0067] like Figure 2 As shown, the cooling fan includes an ice crystal box 5, which is suitable for storing ice crystals. The ice crystal box 5 is arranged in the installation groove 301 and is located below the composite filter assembly 4. By arranging the ice crystal box 5 in the installation groove 301, the water can be cooled to a certain extent before being circulated, so that the water can take away more heat in the air, making the air blown by the cooling fan cooler and improving the user experience. As a convertible embodiment, it is also possible that the ice crystal box 5 is not arranged in the cooling fan.

[0068] The ice crystals can be used to enhance the cooling effect of the cooling fan. Before use, the ice crystal box 5 can be placed in a refrigerator for 5 to 6 hours to freeze the ice crystals in the ice crystal box 5. When in use, the ice crystal box 5 is taken out of the refrigerator and placed in the installation slot 301 of the cooling fan to cool the water. The ice crystals in the ice crystal box 5 can be recycled and never expire.

[0069] The cooling fan in this embodiment is mainly for large-capacity cooling fans. The housing includes an upper housing 1 and a lower housing 2. Its water circulation system has two water tanks, namely an upper water tank and a lower water tank. The upper water tank is arranged in the upper housing 1, and the lower water tank is arranged in the lower housing 2. The lower water tank mainly places a water pump assembly 9 and stores circulating water. The upper water tank mainly places a wet curtain 6 and a water distributor. The water distributor is arranged above the wet curtain 6. The upper water tank can also store a small amount of water, and the water is evenly distributed from the water distributor to the wet curtain 6. The upper water tank and the lower water tank are connected through an upper water pipe 7 and a return water pipe 8 to realize water circulation.

[0070] In the present embodiment, the filtering and purifying of water when adding water to the water tank to prevent the water path in the water circulation system from being blocked refers to adding water to the upper water tank.

[0071] like Figure 1As shown, in addition to the mounting slot 301 , the top cover 3 of the cooling fan is also provided with a control panel 302 , and the user can operate the opening and closing, wind speed, wind direction, etc. of the cooling fan through the control panel 302 according to actual needs.

[0072] An air inlet 101 is provided at the rear of the upper shell 1 of the cooling fan, and an air outlet is provided at the front. The incoming air passes through the wet curtain 6, fully absorbs the coldness of the water, and is blown out from the air outlet to provide cold air for the user.

[0073] In order to facilitate the movement of the cooling fan, four moving wheels 10 are provided at the bottom of the lower shell 2 of the cooling fan, so that the user can move the cooling fan to any area requiring cooling according to actual needs, which is convenient and easy.

[0074] The working principle of the water circulation system of the cooling fan is as follows:

[0075] When adding water, the water flows through the primary filter 401 to complete the first-level filtration, filtering out water-insoluble impurities and large particles. Then it passes through the resin filter element 402 to complete the secondary filtration, softening the circulating water. The resin particles 4021 in the resin filter element 402 can absorb calcium and magnesium ions in the water, softening the water quality and preventing scaling. Then the water flows into the upper water tank and contacts the air at the wet curtain 6 for evaporative cooling. The water pump assembly 9 pumps the water in the lower water tank to the upper water tank for water circulation composite filtration assembly.

[0076] The assembly process is as follows:

[0077] During assembly, first put the resin filter element 402 into the filter box 403, then glue the primary filter 401 onto the filter box cover 404, and then assemble the third buckle 4041 of the filter box cover 404 with the second buckle 4032 on the inner side of the filter box 403 to complete the assembly of the composite filter assembly 4. Put the assembled composite filter assembly 4 into the installation slot 301 of the top cover 3, align the groove on the outer wall of the filter box 403 with the convex rib in the top cover 3, and at the same time, clamp the first buckle 4031 on the outer wall of the filter box 403 with the clamping groove on the inner wall of the installation slot 301 to complete the limit. After the composite filter assembly 4 is installed, the ice crystal box 5 can be tilted from the side and placed into the installation slot 301, located below the composite filter assembly 4. The ice crystal box 5 is used to reduce the water temperature so that when the water at the wet curtain 6 evaporates, it can take away more heat in the air, making the wind blown by the cold fan cooler.

[0078] Here’s how to use it:

[0079] When adding water, pour water from the water adding part 4042 above the filter box cover 404. Since the filter box cover 404 is designed with an inclined slope, the water can be concentrated at the primary filter 401. After the first level of filtration, the water falls into the filter box 403 and fully contacts the resin filter element 402 in the filter box 403. The resin filter element 402 takes away the calcium and magnesium ions in the water, completing the softening and purification of the added water. The purified water flows out from the bottom of the filter box 403, contacts the ice crystal box 5 for cooling, and then falls from the water separator to the wet curtain 6, contacts the air for evaporation circulation.

[0080] The replacement cycle of the filter box 403 is relatively long. Depending on the water quality used, it can be disassembled and cleaned once every six months under normal household conditions. When cleaning, the resin filter element 402 needs to be immersed in high-concentration salt water. Of course, a special cleaning package can also be designed according to user needs to clean and regenerate the resin filter element 402.

[0081] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A cooling fan, characterized in that: include: A shell, wherein a water tank is arranged inside the shell, and a top cover (3) is arranged on the shell, and an installation space is arranged on the top cover (3), suitable for a user to add water into the water tank through the installation space; A composite filter assembly (4) is detachably connected to the installation space.

2. The cooling fan according to claim 1, characterized in that: The composite filter assembly (4) is snap-fitted into the installation space.

3. The cooling fan according to claim 1 or 2, characterized in that: The composite filter assembly (4) comprises: a primary filter screen (401) and a resin filter element (402); the primary filter screen (401) is arranged above the resin filter element (402), and is suitable for water added to the water tank by a user to first pass through the primary filter screen (401) and then pass through the resin filter element (402).

4. The cooling fan according to claim 3, characterized in that: The composite filter assembly (4) comprises: A filter box (403) is detachably connected to the installation space, the filter box (403) having a receiving space, and the resin filter element (402) is arranged in the receiving space; The filter box cover (404) is detachably connected to the top of the filter box (403), and the primary filter (401) is provided on the filter box cover (404).

5. The cooling fan according to claim 4, characterized in that: The filter box (403) is snap-connected with the installation space; And / or, the filter box cover (404) is snap-connected with the filter box (403).

6. The cooling fan according to claim 5, characterized in that: A first buckle (4031) is provided on the outer wall of the filter box (403), and a clamping groove for matching and connecting with the first buckle (4031) is provided on the side wall of the installation space; And / or, a second buckle (4032) is provided on the inner wall of the filter box (403), and a third buckle (4041) which cooperates with the second buckle (4032) is provided on the filter box cover (404).

7. The cooling fan according to any one of claims 4 to 6, characterized in that: The filter box (403) is provided with a first positioning structure, and the installation space is provided with a second positioning structure that cooperates with and is connected to the first positioning structure.

8. The cooling fan according to claim 7, characterized in that: The first positioning structure is a groove, and the second positioning structure is a convex rib.

9. The cooling fan according to any one of claims 4 to 6, characterized in that: The filter box cover (404) is provided with a water adding portion (4042), and the water adding portion (4042) is arranged in an inclined manner.

10. The cooling fan according to any one of claims 1 or 2, 4 to 6, characterized in that: The cooling fan comprises an ice crystal box (5), wherein the ice crystal box (5) is suitable for storing ice crystals, and the ice crystal box (5) is arranged in the installation space and below the composite filter assembly (4); And / or, the installation space is an installation groove (301).

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