A hand-held multi-functional fan

Abstract

The utility model discloses a handheld multifunctional fan, including the shell, the shell inside is equipped with the battery, and the shell inside is equipped with the fan, the fan and the battery electric nature of shell inside link, the shell side alignment fan's air inlet department is equipped with the bearing tray, the bearing tray inside is equipped with the filter disc, the filter disc and the bearing tray between detachable link, the fan air outlet end is equipped with the refrigeration box, the refrigeration box middle part is equipped with the semiconductor refrigeration piece, the semiconductor refrigeration piece and shell electric nature link, the both sides of refrigeration box and shell are connected through bolt. The utility model discloses a bearing tray and filter disc are set up in the air inlet of shell, utilize bearing tray and filter disc and can filter the air of inhaling, avoid the fan inhale a large number of dust, and filter disc can replace simultaneously, the filter disc is dirty after convenient quick replacement filter disc, make whole handheld fan can be used in the area of more dust.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, specifically a handheld multi-functional fan. Background Technology

[0002] Handheld fans, due to their small size and portability, have become essential items for outdoor travel, commuting, camping, and other scenarios in summer. Their core function is to generate airflow by rotating fan blades driven by a motor, achieving localized cooling. However, with the upgrading of consumer demands, existing handheld fans have gradually revealed many technical shortcomings, making it difficult to meet users' diverse and high-safety needs. Therefore, some new types of handheld fans have emerged on the market.

[0003] For example, utility model patent CN222688353U discloses a handheld multi-functional fan, including a housing, a first fan and several semiconductor cooling chips disposed inside the housing, the first fan and the semiconductor cooling chips being located on the same axis, the first fan being located at one end of the semiconductor cooling chips; the semiconductor cooling chips dividing the interior of the housing at their location into a cold half-zone and a hot half-zone; a first air inlet being opened at the end of the housing near the first fan; and a cold air outlet and a hot air outlet being opened at the end of the housing away from the first fan, wherein the cold air outlet is located in the cold half-zone and the hot air outlet is located in the hot half-zone.

[0004] The handheld multi-functional fan provided by the aforementioned patent can separate cold and hot air, improving its performance. However, existing handheld multi-functional fans lack a filtration structure. In dusty environments, where the ambient air contains a large amount of suspended dust, the fan directly draws in this dust. Because existing handheld multi-functional fans do not have a filtration structure, the inhaled dust cannot be intercepted, resulting in the outflow of dust carried by the airflow. Utility Model Content

[0005] The purpose of this invention is to provide a handheld multi-functional fan that improves the problem that existing handheld multi-functional fans do not have a filtration structure, resulting in dust being carried in the airflow.

[0006] This utility model is implemented as follows: A handheld multi-functional fan includes a housing, an inner battery and a fan, the fan being electrically connected to the inner battery. A support tray is located on the side of the housing, aligned with the fan's air inlet, and a filter is detachably connected to the support tray. A cooling box is located at the fan's air outlet, with a semiconductor cooling chip in the center of the cooling box, electrically connected to the housing. The cooling box is bolted to both sides of the housing.

[0007] Preferably, the inner side of the housing is provided with an installation cavity, the rear end face of the housing is provided with a charging slot, the front end of the housing is provided with an opening, and the side of the housing is provided with an air inlet aligned with the air inlet of the fan.

[0008] Preferably, the housing has a connecting slot inside, a display screen on the upper surface of the housing, and control buttons symmetrically arranged on both sides of the display screen on the upper surface of the housing; connecting plates are provided at the front ends of both sides of the housing, and multiple connecting holes are provided on the connecting plates.

[0009] Preferably, the fan has a fan wheel in the middle, and the upper part of the fan housing has multiple buckles, and the lower part of the fan housing has multiple clips, with the clips and buckles designed to engage with each other; the fan has a power plug at the rear side, and the fan has a connector at the air outlet, with multiple bolt holes on the connector.

[0010] Preferably, the internal space of the cooling box is divided into upper and lower parts by a semiconductor cooling chip. The upper part is a heat dissipation area and the lower part is a cooling area. A connecting line is connected to one side of the semiconductor cooling chip. One end of the connecting line passes through the cooling box and is provided with a connecting plug. Multiple heat dissipation fins are evenly distributed on the upper surface of the semiconductor cooling chip.

[0011] Preferably, a hot air outlet is provided on one side of the refrigeration box, aligned with the heat dissipation area, and a cold air outlet is provided at the bottom front end of the refrigeration box, aligned with the refrigeration area.

[0012] Preferably, one end of the refrigeration box is provided with a sleeve, which is fitted onto the plug, and the sleeve is provided with multiple countersunk holes aligned with the bolt holes; the rear ends of both sides of the refrigeration box are provided with slots, and the inner side of the slots is provided with multiple connecting grooves.

[0013] Preferably, the bottom end of the support tray is provided with an adapter ring, which is threadedly connected to the air inlet hole. The bottom inner side of the support tray is provided with a vent hole. The filter sheet is provided with filter cotton in the middle and a patch is provided on the bottom edge of the filter sheet. The patch is attached to the support tray.

[0014] Preferably, it also includes a heat exchange box, which is installed at the hot air outlet on the side of the cooling box to absorb heat from the hot air.

[0015] Preferably, the heat exchange box has a retaining ring at one end facing the hot air outlet, and a magnetic strip is provided at the position where the heat exchange box fits into the refrigeration box for magnetic connection between the heat exchange box and the refrigeration box; the heat exchange box has multiple heat exchange holes in the middle, the heat exchange box is hollow inside, the top of the heat exchange box has a water inlet, the water inlet has a plug, the bottom of the plug has a threaded connecting plate, the threaded connecting plate is threaded to the water inlet, and the top of the plug has a rotating rod for disassembling and assembling the plug.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model has a support tray and a filter at the air inlet of the outer shell. The support tray and filter can filter the intake air, preventing the fan from sucking in a lot of dust. At the same time, the filter can be replaced, which is convenient to quickly replace the filter when it gets dirty. This makes the handheld fan usable in areas with a lot of dust, while also ensuring that the air blown out by the fan is clean enough.

[0017] 2. This utility model uses a heat exchange box at the hot air outlet to absorb heat from the hot air, thereby cooling the air at the hot air outlet. This allows the air at the hot air outlet to have a certain cooling effect even in summer. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the outer shell of this utility model; Figure 3 This is a schematic diagram of the structure of the fan of this utility model; Figure 4 This is a structural schematic diagram of the refrigeration box of this utility model from a rear oblique top view; Figure 5 This is a schematic diagram of the structure of the refrigeration box of this utility model from a front-view angle; Figure 6 This is a schematic diagram of the structure of the pallet of this utility model; Figure 7 This is a schematic diagram of the structure of the filter element of this utility model; Figure 8 This is a structural schematic diagram of the heat exchange box of this utility model.

[0019] In the diagram: 1. Outer shell; 10. Mounting cavity; 11. Charging slot; 12. Display screen; 13. Control button; 14. Air inlet; 15. Connecting slot; 16. Connecting plate; 17. Connecting hole; 2. Fan; 21. Impeller; 22. Clip; 23. Clip head; 24. Power plug; 25. Connector; 26. Bolt hole; 3. Cooling box; 31. Connecting cable; 32. Connecting plug; 33. Semiconductor cooling chip; 34. Heat dissipation fins; 35. Socket; 36. Countersunk hole; 37. Slot; 38. Connecting slot; 39. Hot air outlet; 391. Cold air outlet; 4. Support tray; 41. Vent hole; 42. Adapter ring; 5. Filter plate; 51. Patch; 52. Filter cotton; 6. Heat exchange box; 61. Magnetic plate; 62. Water inlet; 63. Heat exchange hole; 64. Insert ring; 65. Plug; 66. Rotating rod; 67. Threaded connecting plate. Detailed Implementation

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details: Example 1 like Figure 1 and Figure 4 As shown, a handheld multi-functional fan includes a housing 1, with a battery and a fan 2 located inside the housing 1. The fan 2 is electrically connected to the battery inside the housing 1. The housing 1 provides support for the various components, facilitating the assembly and disassembly of the entire handheld fan. The fan 2 draws in and exhausts air to create airflow, directing it towards a designated object or user, providing a cooling experience in summer. A support tray 4 is located on the side of the housing 1, aligned with the air inlet of the fan 2. A filter 5 is installed inside the support tray 4 and is detachably connected to it. The combination of the support tray 4 and the filter 5 facilitates the filtration of dust in the air, preventing dust from being blown onto objects or people. A cooling box 3 is located at the air outlet of the fan 2. A semiconductor cooling chip 33 is located in the middle of the cooling box 3. The cooling box 3, in conjunction with the semiconductor cooling chip 33, cools the airflow flowing below the cooling box 3, while the airflow flowing above the cooling box 3 dissipates heat from the semiconductor cooling chip 33. The thermoelectric cooler 33 is electrically connected to the outer casing 1, facilitating its operation. The sides of the cooling box 3 are connected to the outer casing 1 via bolts, ensuring a stable connection between the cooling box 3 and the outer casing 1.

[0022] like Figure 2As shown, the inner side of the outer casing 1 has a mounting cavity 10, which facilitates the installation of the fan 2 and ensures stable installation of the fan 2. The rear end face of the outer casing 1 has a charging slot 11, which facilitates charging of the battery inside the outer casing 1. The front end of the outer casing 1 has an opening, which facilitates the installation and removal of the fan 2. An air inlet 14 is provided on the side of the casing, aligned with the air inlet of the fan 2, to facilitate air intake by the fan 2. The inner side of the outer casing 1 has a connecting slot 15, which facilitates connection to the semiconductor cooling chip 33. The upper surface of the outer casing 1 has a display screen 12, which displays the cooling temperature. Control buttons 13 are symmetrically arranged on both sides of the display screen 12 on the upper surface of the outer casing 1; the control buttons 13 facilitate the operation of the entire fan. Connecting plates 16 are provided on the front ends of both sides of the outer casing 1, and the connecting plates 16 have multiple connecting holes 17. The connection plates 16 and connecting holes 17 facilitate the connection of the outer casing 1 to the cooling box 3 by bolts.

[0023] like Figure 3 As shown, the fan 2 has a fan wheel 21 in the middle, which is easy to rotate, thus facilitating airflow. The upper part of the fan 2 housing has multiple clips 22, and the lower part has multiple clips 23. The clips 23 and clips 22 are designed to interlock, facilitating quick and easy assembly of the upper and lower parts of the centrifuge housing. A power plug 24 is located at the rear side of the fan 2, allowing for electrical connection between the fan 2 and the battery inside the outer casing 1. The air outlet of the fan 2 has a connector 25 with multiple bolt holes 26. The connection between the connector 25 and the bolt holes 26 facilitates connection between the fan 2 and the refrigeration box 3.

[0024] like Figure 4 and Figure 5As shown, the internal space of the cooling box 3 is divided into upper and lower parts by a semiconductor cooling chip 33. The upper part is a heat dissipation area, and the lower part is a cooling area. The gas discharged from the outlet of the fan 2 is divided into two parts by the semiconductor cooling chip 33. The lower part is discharged through the cooling area to create a cooling sensation for users or objects. The upper part, as airflow, can dissipate heat from the heat dissipation surface of the semiconductor cooling chip 33, allowing heat to be quickly expelled from the heat dissipation area. A connecting wire 31 is connected to one side of the semiconductor cooling chip 33. One end of the connecting wire 31 extends out of the cooling box 3 and is equipped with a connecting plug 32. The connection of the connecting wire 31 and the connecting plug 32 facilitates the electrical connection of the semiconductor cooling chip 33 to the battery. Multiple heat dissipation fins 34 are evenly distributed on the upper surface of the semiconductor cooling chip 33 to facilitate rapid heat dissipation from the semiconductor heat dissipation surface. A hot air outlet 39 is provided on one side of the cooling box 3, aligned with the heat dissipation area, to facilitate the discharge of cooled air. A cold air outlet 391 is provided at the bottom front end of the cooling box 3, aligned with the cooling area, to facilitate the discharge of cold air and thus create a cooling sensation. One end of the refrigeration box 3 is provided with a socket 35, which is fitted onto the plug 25. The socket 35 has multiple countersunk holes 36 aligned with the bolt holes 26. The socket 35 and the countersunk holes 36 facilitate the stable connection of the refrigeration box 3 to the fan 2 using bolts. The rear ends of both sides of the refrigeration box 3 are provided with slots 37. The inner side of the slots 37 has multiple connecting grooves 38. The slots 37 and the connecting grooves 38 facilitate the use of the connecting plate 16 and the connecting hole 17, making it easy to connect the refrigeration box 3 to the outer shell 1.

[0025] like Figure 6 and Figure 7 As shown, the bottom of the support tray 4 is provided with an adapter ring 42, which is threadedly connected to the air inlet 14, facilitating the disassembly and use of the support tray 4. An air vent 41 is provided on the inner bottom of the support tray 4 to facilitate airflow. A filter cotton 52 is provided in the middle of the filter element 5 to facilitate the filtration of dust in the air. Furthermore, a patch 51 is provided on the bottom edge of the filter element 5, which adheres to the support tray 4, facilitating the stability of the patch 51 and its removal and replacement.

[0026] Example 2 like Figure 1 and Figure 4As shown, a handheld multi-functional fan includes a housing 1, with a battery and a fan 2 located inside the housing 1. The fan 2 is electrically connected to the battery inside the housing 1. The housing 1 provides support for the various components, facilitating the assembly and disassembly of the entire handheld fan. The fan 2 draws in and exhausts air to create airflow, directing it towards a designated object or user, providing a cooling experience in summer. A support tray 4 is located on the side of the housing 1, aligned with the air inlet of the fan 2. A filter 5 is installed inside the support tray 4 and is detachably connected to it. The combination of the support tray 4 and the filter 5 facilitates the filtration of dust in the air, preventing dust from being blown onto objects or people. A cooling box 3 is located at the air outlet of the fan 2. A semiconductor cooling chip 33 is located in the middle of the cooling box 3. The cooling box 3, in conjunction with the semiconductor cooling chip 33, cools the airflow flowing below the cooling box 3, while the airflow flowing above the cooling box 3 dissipates heat from the semiconductor cooling chip 33. The thermoelectric cooler 33 is electrically connected to the outer casing 1, facilitating its operation. The sides of the cooling box 3 are connected to the outer casing 1 via bolts, ensuring a stable connection between the cooling box 3 and the outer casing 1.

[0027] like Figure 2 As shown, the inner side of the outer casing 1 has a mounting cavity 10, which facilitates the installation of the fan 2 and ensures stable installation of the fan 2. The rear end face of the outer casing 1 has a charging slot 11, which facilitates charging of the battery inside the outer casing 1. The front end of the outer casing 1 has an opening, which facilitates the installation and removal of the fan 2. An air inlet 14 is provided on the side of the casing, aligned with the air inlet of the fan 2, to facilitate air intake by the fan 2. The inner side of the outer casing 1 has a connecting slot 15, which facilitates connection to the semiconductor cooling chip 33. The upper surface of the outer casing 1 has a display screen 12, which displays the cooling temperature. Control buttons 13 are symmetrically arranged on both sides of the display screen 12 on the upper surface of the outer casing 1; the control buttons 13 facilitate the operation of the entire fan. Connecting plates 16 are provided on the front ends of both sides of the outer casing 1, and the connecting plates 16 have multiple connecting holes 17. The connection plates 16 and connecting holes 17 facilitate the connection of the outer casing 1 to the cooling box 3 by bolts.

[0028] like Figure 3 As shown, the fan 2 has a fan wheel 21 in the middle, which is easy to rotate, thus facilitating airflow. The upper part of the fan 2 housing has multiple clips 22, and the lower part has multiple clips 23. The clips 23 and clips 22 are designed to interlock, facilitating quick and easy assembly of the upper and lower parts of the centrifuge housing. A power plug 24 is located at the rear side of the fan 2, allowing for electrical connection between the fan 2 and the battery inside the outer casing 1. The air outlet of the fan 2 has a connector 25 with multiple bolt holes 26. The connection between the connector 25 and the bolt holes 26 facilitates connection between the fan 2 and the refrigeration box 3.

[0029] like Figure 4 and Figure 5 As shown, the internal space of the cooling box 3 is divided into upper and lower parts by a semiconductor cooling chip 33. The upper part is a heat dissipation area, and the lower part is a cooling area. The gas discharged from the outlet of the fan 2 is divided into two parts by the semiconductor cooling chip 33. The lower part is discharged through the cooling area to create a cooling sensation for users or objects. The upper part, as airflow, can dissipate heat from the heat dissipation surface of the semiconductor cooling chip 33, allowing heat to be quickly expelled from the heat dissipation area. A connecting wire 31 is connected to one side of the semiconductor cooling chip 33. One end of the connecting wire 31 extends out of the cooling box 3 and is equipped with a connecting plug 32. The connection of the connecting wire 31 and the connecting plug 32 facilitates the electrical connection of the semiconductor cooling chip 33 to the battery. Multiple heat dissipation fins 34 are evenly distributed on the upper surface of the semiconductor cooling chip 33 to facilitate rapid heat dissipation from the semiconductor heat dissipation surface. A hot air outlet 39 is provided on one side of the cooling box 3, aligned with the heat dissipation area, to facilitate the discharge of cooled air. A cold air outlet 391 is provided at the bottom front end of the cooling box 3, aligned with the cooling area, to facilitate the discharge of cold air and thus create a cooling sensation. One end of the refrigeration box 3 is provided with a socket 35, which is fitted onto the plug 25. The socket 35 has multiple countersunk holes 36 aligned with the bolt holes 26. The socket 35 and the countersunk holes 36 facilitate the stable connection of the refrigeration box 3 to the fan 2 using bolts. The rear ends of both sides of the refrigeration box 3 are provided with slots 37. The inner side of the slots 37 has multiple connecting grooves 38. The slots 37 and the connecting grooves 38 facilitate the use of the connecting plate 16 and the connecting hole 17, making it easy to connect the refrigeration box 3 to the outer shell 1.

[0030] like Figure 6 and Figure 7 As shown, the bottom of the support tray 4 is provided with an adapter ring 42, which is threadedly connected to the air inlet 14, facilitating the disassembly and use of the support tray 4. An air vent 41 is provided on the inner bottom of the support tray 4 to facilitate airflow. A filter cotton 52 is provided in the middle of the filter element 5 to facilitate the filtration of dust in the air. Furthermore, a patch 51 is provided on the bottom edge of the filter element 5, which adheres to the support tray 4, facilitating the stability of the patch 51 and its removal and replacement.

[0031] like Figure 1 As shown, it also includes a heat exchange box 6, which is installed at the hot air outlet 39 on the side of the cooling box 3 to absorb heat from the hot air.

[0032] like Figure 8As shown, the heat exchange box 6 has a retainer ring 64 at the end facing the hot air outlet 39, which is convenient for insertion into the inside of the hot air outlet 39. A magnetic stripe 61 is also provided at the position where the heat exchange box 6 is attached to the cooling box 3, for magnetic connection between the heat exchange box 6 and the cooling box 3, facilitating quick assembly and disassembly of the heat exchange box 6 according to usage requirements. Multiple heat exchange holes 63 are provided in the middle of the heat exchange box 6 to facilitate the passage of hot air, thereby facilitating heat exchange with the liquid inside the heat exchange box 6. The interior of the heat exchange box 6 is hollow, and the hollow space is used to inject the heat exchange liquid or other phase change material, such as water. A water inlet 62 is provided at the top of the heat exchange box 6 for injecting the phase change material or heat exchange liquid. A plug 65 is provided at the water inlet 62, and a threaded connecting plate 67 is provided at the bottom end of the plug 65 to seal the water inlet 62. The threaded connecting plate 67 is threadedly connected to the water inlet 62, and the top of the plug 65 is provided with a rotating rod 66 for disassembling and assembling the plug 65.

[0033] Working principle: When the handheld multi-functional fan is working, the battery inside the outer casing 1 powers the fan 2 and the thermoelectric cooler 33. After the fan 2 starts, it draws in air through the air inlet 14 on the side of the outer casing 1. The airflow first passes through the filter 5 in the tray 4 at the air inlet 14 to filter out dust in the air before entering the fan 2. The fan is then driven by the rotation of the impeller 21 to form a stable airflow and deliver it to the cooling box 3. The cooling box 3 is divided into upper and lower parts by the thermoelectric cooler 33. After the airflow enters, it splits into two paths. The lower part flows through the cooling zone and is cooled by the thermoelectric cooler 33, and is finally blown out from the cold air outlet 391 at the bottom front of the cooling box 3 to provide a cooling sensation for the user or object. The upper part of the airflow flows through the heat dissipation zone, carrying away the heat generated by the thermoelectric cooler 33 during operation, forming hot air that is discharged from the hot air outlet 39 on the side of the cooling box 3. The heat exchange box 6 installed at the hot air outlet 39 is inserted into the inside of the outlet by the insert ring 64 and fixed by the magnetic suction plate 61. When the hot air flows through the heat exchange hole 63 on the heat exchange box 6, it exchanges heat with the water or phase change material injected inside the heat exchange box 6. The heat in the hot air is absorbed and recovered. The heat exchange box 6 can be flexibly injected or replaced by removing and installing the sealing plug 65. During the whole process, all components work together to achieve both cool air supply and dust filtration and heat recovery.

[0034] In summary, compared with the prior art, this application provides a support tray 4 and a filter 5 at the air inlet of the housing 1. The support tray 4 and the filter 5 can filter the intake air, preventing the fan 2 from sucking in a large amount of dust. At the same time, the filter 5 is replaceable, which makes it convenient to quickly replace the filter 5 when it gets dirty. This allows the handheld fan to be used in areas with a lot of dust, while also ensuring that the air blown out by the fan 2 is clean enough.

[0035] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A handheld multi-functional fan, comprising a housing, characterized in that, A battery is located inside the housing, and a fan is also located inside the housing. The fan is electrically connected to the battery inside the housing. A support tray is located on the side of the housing, aligned with the air inlet of the fan. A filter is located inside the support tray, and the filter is detachably connected to the support tray. A cooling box is located at the air outlet of the fan. A semiconductor cooling chip is located in the middle of the cooling box, and the semiconductor cooling chip is electrically connected to the housing. The two sides of the cooling box are connected to the housing by bolts.

2. A handheld multi-functional fan according to claim 1, characterized in that, The inner side of the housing is provided with an installation cavity, the rear end face of the housing is provided with a charging slot, the front end of the housing is provided with an opening, and the side of the housing is provided with an air inlet aligned with the air inlet of the fan.

3. A handheld multi-functional fan according to claim 2, characterized in that, The housing has a connecting slot inside, a display screen on the upper surface of the housing, and control buttons symmetrically arranged on both sides of the display screen on the upper surface of the housing; connecting plates are provided at the front ends of both sides of the housing, and multiple connecting holes are provided on the connecting plates.

4. A handheld multi-functional fan according to claim 1, characterized in that, The fan has a wind turbine in the middle, and multiple buckles on the upper part of the fan housing and multiple clips on the lower part of the fan housing. The clips and buckles are designed to interlock. The fan has a power plug at the rear side and a connector at the air outlet. The connector has multiple bolt holes.

5. A handheld multi-functional fan according to claim 1, characterized in that, The internal space of the cooling box is divided into upper and lower parts by a semiconductor cooling chip. The upper part is a heat dissipation area and the lower part is a cooling area. A connecting line is connected to one side of the semiconductor cooling chip. One end of the connecting line passes through the cooling box and is equipped with a connecting plug. Multiple heat dissipation fins are evenly distributed on the upper surface of the semiconductor cooling chip.

6. A handheld multi-functional fan according to claim 5, characterized in that, A hot air outlet is provided on one side of the refrigeration box, aligned with the heat dissipation area, and a cold air outlet is provided at the bottom front end of the refrigeration box, aligned with the refrigeration area.

7. A handheld multi-functional fan according to claim 4, characterized in that, The refrigeration box has a sleeve at one end, which is fitted onto the plug, and the sleeve has multiple countersunk holes aligned with the bolt holes; the refrigeration box has slots at both rear ends, and the inner side of the slots has multiple connecting grooves.

8. A handheld multi-functional fan according to claim 2, characterized in that, The bottom of the support tray is provided with an adapter ring, which is threadedly connected to the air inlet. The bottom inner side of the support tray is provided with a vent hole. The filter is provided with filter cotton in the middle and a patch is provided on the bottom edge of the filter. The patch is attached to the support tray.

9. A handheld multi-functional fan according to claim 6, characterized in that, It also includes a heat exchange box, which is installed at the hot air outlet on the side of the cooling box to absorb heat from the hot air.

10. A handheld multi-functional fan according to claim 9, characterized in that, The heat exchange box has a retaining ring at one end facing the hot air outlet, and a magnetic strip is provided at the position where the heat exchange box fits into the refrigeration box for magnetic connection between the heat exchange box and the refrigeration box; the heat exchange box has multiple heat exchange holes in the middle, the heat exchange box is hollow inside, the top of the heat exchange box has a water inlet, the water inlet has a plug, the bottom of the plug has a threaded connecting plate, the threaded connecting plate is threaded to the water inlet, and the top of the plug has a rotating rod for disassembling and assembling the plug.

Images