Air conditioning cooling fan

Abstract

The present application relates to the technical field of air conditioning heat dissipation, and in particular to an air conditioning heat dissipation fan, comprising a housing, an air inlet and an air outlet are arranged on the housing, and an air inlet sealing mechanism, an air outlet sealing mechanism and a driving mechanism are installed on the housing. The air inlet sealing mechanism is used to block the air inlet, and the air outlet sealing mechanism is used to block the air outlet. The driving mechanism drives the air inlet sealing mechanism to block the air inlet and the air outlet sealing mechanism to block the air outlet at the same time. Thereby, the air inlet and air outlet of the housing are blocked when the heat dissipation fan is not in use. The present application has the effect of reducing dust accumulation of the heat dissipation fan when it is not in use.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning heat dissipation, and in particular to an air conditioning heat dissipation fan. Background Art

[0002] Air conditioners are divided into cooling-only air conditioners and dual-purpose air conditioners. The working principles of the two air conditioners are the same. When the refrigerant changes from gas to liquid, it releases a lot of heat. When it changes from liquid to gas, it absorbs a lot of heat.

[0003] The principle of air conditioning refrigeration is to use a compressor to compress the gaseous refrigerant into a high-temperature and high-pressure liquid refrigerant, and then send it to the condenser to dissipate heat and become a normal-temperature and high-pressure liquid refrigerant. In order to enable the condenser to dissipate heat quickly, a cooling fan is usually used to accelerate the convection of the air, so as to quickly conduct convection heat transfer with the air.

[0004] At present, the integrated multi-purpose air conditioner with the publication number CN113525014A includes a casing, and an electric compressor, a condenser and an evaporator assembly connected by a refrigerant pipeline. The condenser is horizontally installed above the evaporator assembly and the electric compressor and is located at the upper part of the casing. A heat dissipation fan is fixed above the condenser and is located at the top of the casing. An air inlet and an air outlet that are connected to the outside of the casing are opened on the same side of the evaporator assembly, and the air inlet and the air outlet are respectively connected to ventilation pipes that are connected to the temperature space to be adjusted.

[0005] With regard to the above-mentioned related technologies, air conditioners are mainly used in summer and winter. The air conditioner outdoor unit is placed outdoors for a long time without being used. The heat dissipation fan in the air conditioner outdoor unit is prone to accumulate a lot of dust, which affects the service life of the fan. Summary of the invention

[0006] In order to reduce the accumulation of dust when the cooling fan is not in use, the present application provides an air conditioning cooling fan.

[0007] The present application provides an air conditioning cooling fan adopting the following technical solution:

[0008] An air conditioner heat dissipation fan, comprising:

[0009] A housing, wherein an air inlet and an air outlet are provided on the housing;

[0010] An air inlet sealing mechanism, comprising a plurality of rotating blades arranged in parallel, wherein the rotating blades are rotatably connected to the air inlet of the shell to shield the air inlet;

[0011] The air outlet sealing mechanism comprises a rotating plate and a plurality of rotating plates in a circular array, the rotating plate is provided with a vent connected to the air outlet, the rotating plate is rotatably connected to the shell around the axis of the vent, one end of the rotating plate is rotatably connected to the shell, and the other end is rotatably connected to a moving block, the moving block is slidably connected to the rotating plate, the sliding direction of the moving block on the rotating plate is misaligned with the center of the vent, an inner concave surface and an outer convex surface are provided on the rotating plate, and when the moving block moves close to the center of the vent, the plurality of rotating plates move closer to each other until the inner concave surfaces and the outer convex surfaces between adjacent rotating plates fit together to block the air outlet or the vent;

[0012] The driving mechanism is used to drive the plurality of rotating blades and the rotating plate to rotate synchronously.

[0013] By adopting the above technical solution, when the air conditioner is not in use, the driving mechanism drives the rotating blades of the air inlet sealing mechanism to seal the air inlet, and drives the rotating plate of the air outlet sealing mechanism to seal the air outlet, thereby completing the sealing of the inside of the shell, thereby reducing the accumulation of dust and other impurities in the heat dissipation fan when the air conditioner is not in use.

[0014] Optionally, the air inlet sealing mechanism further includes a fixing rod, wherein a plurality of the fixing rods are provided, wherein the axes of the plurality of the fixing rods are parallel and arranged on the same plane, wherein the fixing rods are fixedly connected to the housing, wherein the rotating blades are rotationally connected to the fixing rods in a one-to-one correspondence, and adjacent rotating blades can overlap together;

[0015] One end of the rotating blade close to the inside of the shell is rotatably connected to a lifting transmission member, the lifting transmission member is connected to the driving mechanism, and the lifting transmission member is used to synchronously drive a plurality of the rotating blades to rotate around the fixed rod.

[0016] By adopting the above technical solution, the movement of the lifting transmission member is utilized to drive the rotating blades to rotate around the fixed rod, thereby controlling the rotating blades to be in an open state or overlap each other to block the air inlet.

[0017] Optionally, the lifting transmission member includes a control plate, a limiting groove is provided on the control plate, the limiting plate is fixedly connected to the rotating blade, and the limiting plate is inserted in the limiting groove; one end of the rotating plate is rotatably connected to a control block, a control groove is provided on the control plate, and the control block is inserted in the control groove.

[0018] By adopting the above technical solution, the lifting transmission member is connected to the air outlet sealing mechanism, so that the lifting transmission member can control the opening of the rotating blades and also control the air outlet sealing mechanism to be in an open state; the lifting transmission member can control the closing of the rotating blades and also synchronously control the air outlet sealing mechanism to be in a sealed state.

[0019] Optionally, a lap groove is provided on one end of the rotating leaf away from the lifting transmission member, a yield groove is provided in the middle of the rotating leaf, and the lap grooves and yield grooves of adjacent rotating leaves are spliced ​​together.

[0020] By adopting the above technical solution, when the rotating blades are in a sealed state, the adjacent rotating blades are overlapped more closely, thereby further reducing the external dust or sewage from entering the shell.

[0021] Optionally, one end of the rotating blade close to the lifting transmission member is bent toward the inside of the shell.

[0022] By adopting the above technical solution, when the rotating blades are in the open state, the external air entering the shell can be aligned with the condenser, thereby improving the efficiency of the external air taking away the heat of the condenser and making the heat dissipation efficiency of the condenser higher.

[0023] Optionally, the air inlet sealing mechanism also includes a filter screen, a mounting hole is provided in the middle part where the rotating blade is connected to the fixed rod, the filter screen is fixedly connected to the fixed rod through the mounting hole, and a rotating groove is provided at both ends of the filter screen near the rotating blade, a rotating block is fixedly connected to the rotating blade, and the rotating block is accommodated in the rotating groove.

[0024] By adopting the above technical solution, by opening a mounting hole in the middle of the connection between the rotating blade and the fixed rod, the filter screen is conveniently mounted on the fixed fixed rod, thereby filtering the air entering from the air inlet. The rotating block on the rotating blade fits with the rotating groove of the filter screen, so that the rotating groove is blocked during the rotation of the rotating blade, thereby reducing the possibility of external air entering through the gap.

[0025] Optionally, a moving groove is provided on the rotating plate, and the moving groove gradually moves away from the center of the rotating plate from one end to the other end; and the moving block is inserted in the moving groove.

[0026] By adopting the above technical solution, the rotating plate is rotated so that the moving block slides in the moving groove, thereby causing the rotating plate to rotate on the shell, thereby blocking or opening the air outlet.

[0027] Optionally, the driving mechanism includes a driving member and a thermistor, the driving member and the thermistor are both fixedly connected in the shell, the thermistor is electrically connected to the driving member, the driving member is located at one end of the lifting transmission member and fixedly connected to the lifting transmission member, and the driving member is used to drive the lifting transmission member to move.

[0028] By adopting the above technical solution, when the thermistor senses that the temperature of the condenser is high, the driving member moves, thereby causing the lifting transmission member to move, and the movement of the lifting transmission member drives the rotating blade to rotate, thereby opening the air inlet, and the lifting transmission member simultaneously drives the air outlet sealing mechanism to move, thereby opening the air outlet. Thus, the heat dissipation fan works normally. When the thermistor senses that the temperature of the condenser is low, the driving member resets, thereby driving the lifting transmission member to reset, and the lifting transmission member simultaneously drives the rotating blade to reset and the air outlet sealing mechanism to reset, thereby blocking the air outlet and the air inlet, so that the heat dissipation fan is sealed and protected when not working, reducing the dust accumulated on the heat dissipation fan.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. Through the cooperation of the housing, the air inlet sealing mechanism, the rotating blades, the air outlet sealing mechanism, the rotating plate, the rotating plate and the driving mechanism, when the heat dissipation fan is not in use, the driving mechanism simultaneously drives the rotating blades of the air inlet sealing mechanism and the rotating plate and the rotating plate of the air outlet sealing mechanism to seal the housing, thereby achieving the effect of reducing dust accumulation when the heat dissipation fan is not in use;

[0031] 2. Through the cooperation among the housing, rotating blades, fixed rods, lifting transmission parts, rotating plates, rotating plates and moving blocks, the effect of controlling the air inlet and outlet at the same time can be achieved when driving the lifting transmission parts;

[0032] 3. Through the electrical connection between the thermistor and the driving element, the opening and closing states of the air inlet and the air outlet are controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the air conditioning cooling fan of an embodiment of the present application.

[0034] Figure 2 It is a structural schematic diagram of the hidden part of the shell of the air conditioner cooling fan in the embodiment of the present application.

[0035] Figure 3 It is a schematic diagram of the hidden air outlet sealing structure of the air conditioner heat dissipation fan in the embodiment of the present application.

[0036] Figure 4 It is a structural schematic diagram of the air inlet sealing mechanism and the air outlet sealing mechanism of the embodiment of the present application.

[0037] Figure 5 It is a schematic diagram of the structure of the rotating blade in the embodiment of the present application.

[0038] Description of reference numerals:

[0039] 1. Shell; 11. Air inlet; 12. Air outlet; 13. Protective net; 2. Air inlet sealing mechanism; 21. Rotating blade; 211. Overlap groove; 212. Give way groove; 213. Mounting hole; 214. Rotating block; 215. Limit block; 22. Fixed rod; 23. Filter; 24. Rotating groove; 3. Air outlet sealing mechanism; 31. Rotating plate; 311. Moving groove; 312. Control end; 313. Control block; 32. Rotating plate; 321. Moving block; 4. Driving mechanism; 41. Driving member; 411. Telescopic cylinder; 412. Piston rod; 42. Thermistor; 5. Condenser; 6. Cooling fan; 7. Lifting transmission member; 71. Control board; 72. Limit groove; 73. Control groove. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-5 This application is described in further detail.

[0041] The embodiment of the present application discloses an air conditioner heat dissipation fan.

[0042] Reference Figure 1 and Figure 2 The air conditioner heat dissipation fan comprises a housing 1, on which an air inlet 11 and an air outlet 12 are arranged, and an air inlet sealing mechanism 2, an air outlet sealing mechanism 3 and a driving mechanism 4 are installed. The air inlet sealing mechanism 2 is used to block the air inlet 11, and the air outlet sealing mechanism 3 is used to block the air outlet 12. The driving mechanism 4 drives the air inlet sealing mechanism 2 to block the air inlet 11 and the air outlet sealing mechanism 3 to block the air outlet 12 at the same time. Thus, when the heat dissipation fan 6 is not in use, the air inlet 11 and the air outlet 12 of the housing 1 are blocked, thereby reducing the accumulation of dust on the heat dissipation fan 6.

[0043] Reference Figure 1 The air inlet 11 is arranged on both sides of the housing 1 in the vertical direction. In order to adapt to the rectangular shape of the housing 1 and maximize the proportion of the air inlet space, the air inlet 11 is usually arranged in a rectangular shape. The air outlet 12 is arranged on the front of the housing 1, and the air outlet 12 is usually arranged in a circular shape to adapt to the shape of the heat dissipation fan 6.

[0044] Reference Figure 2 and Figure 3 The housing 1 also contains a condenser 5 and a heat dissipation fan 6. The heat dissipation fan 6 is located between the condenser 5 and the air outlet 12, and the heat dissipation fan 6 is coaxially arranged with the air outlet 12. A protective net 13 is fixedly connected to the housing 1, and the protective net 13 is arranged at the opening of the air outlet 12. The setting of the protective net 13 prevents foreign matter from entering the housing 1 and causing damage to the heat dissipation fan 6, and also reduces the risk of people touching the heat dissipation fan 6 with their limbs when the heat dissipation fan 6 is working.

[0045] The impeller rotates so that external air enters from the air inlet 11 and is discharged from the air outlet 12 after passing through the condenser 5, thereby achieving the goal of dissipating the temperature of the cooler to normal temperature.

[0046] Reference Figure 3 and Figure 4 The air inlet sealing mechanism 2 located on one side includes a rotating blade 21 and a fixed rod 22. In this embodiment, four fixed rods 22 are provided. The axes of the four fixed rods 22 are located in the same plane as the side wall of the housing 1, and the axes of the four fixed rods 22 are arranged in parallel. The four fixed rods 22 are all fixedly connected to the side wall of the air inlet 11, and the rotating blades 21 are connected to the fixed rods 22 in a one-to-one correspondence. The rotating blades 21 are rotated on the fixed rods 22 to achieve the blocking or opening of the air inlet 11. The rotating overlap of the rotating blades 21 facilitates the blocking of the rectangular air inlet.

[0047] Reference Figure 3 and Figure 5 The rotating blade 21 is bent, and one end of the rotating blade 21 located inside the shell 1 is bent toward the middle of the shell 1, so that when the rotating blade 21 is in the open state, the external air can be directed to the condenser 5 (such as Figure 3 ) for cooling, thereby improving the cooling effect of the air.

[0048] Reference Figure 5 A lap groove 211 is provided at the end of the rotating blade 21 located outside the shell 1, and a yield groove 212 is provided in the middle of the rotating blade 21. The yield groove 212 is used for lapping the adjacent rotating blade 21 located above. At this time, the inside of the lap groove 211 abuts against the inner wall of the yield groove 212.

[0049] Reference Figure 5 The rotating blade 21 is provided with a mounting hole 213, which passes through the upper and lower ends of the rotating blade 21, and the two sides of the mounting hole 213 are rotatably connected to the fixing rod 22. The fixing rod 22 is fixedly connected with a filter screen 23, and the setting of the filter screen 23 allows the heat dissipation fan 6 (such as Figure 3 ) During operation, the impurities entering the housing 1 from the outside air are reduced, thereby reducing the heat dissipation fan 6 (such as Figure 3 ) possibility of damage.

[0050] Reference Figure 3 and Figure 5 The filter screen 23 is arranged vertically, and a rotating groove 24 is provided at the part of the filter screen 23 near the rotating blade 21. The rotating groove 24 is provided to facilitate the rotating blade 21 to rotate on the fixing rod 22. At the same time, a rotating block 214 is fixedly connected to the rotating blade 21, and the rotating block 214 blocks the rotating groove 24 during the rotation process. When the rotating blade 21 rotates to the open state, the filter screen 23 can completely filter the air.

[0051] Reference Figure 3 The end of the rotating blade 21 located inside the housing 1 is connected to a lifting transmission member 7, and the lifting transmission member 7 includes a control board 71, and the control board is arranged in a U shape. Both sides of the rotating blade are respectively connected to the control board, so that the control board drives the rotating blade to rotate more stably.

[0052] Reference Figure 3 The limiting block 215 is fixedly connected to the rotating blade 21, and the limiting groove 72 is provided on the control board 71. The limiting groove 72 is a waist-shaped groove, and the length direction of the limiting groove 72 is the horizontal direction. The limiting block 215 is inserted into the limiting groove 72. The four rotating blades 21 are rotated synchronously by moving the control board 71, so as to control the four rotating blades 21 to block or open the air inlet 11 on one side.

[0053] Reference Figure 3 The air inlet sealing mechanisms 2 on the air inlets 11 on both sides are symmetrically arranged, and the air inlets 11 are arranged on both sides at the same time to improve the efficiency of air entering the housing 1.

[0054] Reference Figure 4 The air outlet sealing mechanism 3 includes a rotating plate 31, a vent is provided in the middle of the rotating plate 31, so that the vent of the rotating plate 31 is connected to the air outlet 12 of the housing 1, and five rotating plates 32 are rotatably connected to the housing 1, and the five rotating plates 32 are spliced ​​together to block the air outlet 12. The rotating plate 31 is sleeved on the outer periphery of the housing 1, and the rotating plate 31 is rotatably connected to the housing 1. A moving groove 311 is provided on the rotating plate 31, and one end of the moving groove 311 is arranged close to the center of the rotating plate 31, and the other end gradually deviates away from the center of the rotating plate 31. A moving block 321 is rotatably connected to the rotating plate 31, and the moving block 321 is inserted into the moving groove 311.

[0055] By rotating the rotating plate 31, the moving block 321 slides in the moving groove 311 in a direction away from the center of the rotating plate 31, thereby driving the rotating plate 32 to rotate, so that the rotating plates 32 are separated from each other, and the air outlet 12 is in an open state. The rotating plate 31 is then rotated in the opposite direction, so that the moving block 321 slides in the moving groove 311 in a direction close to the center of the rotating plate 31, so that the rotating plates 32 are spliced ​​together again, thereby blocking the air outlet 12.

[0056] Reference Figure 4 One end of the rotating plate 32 is a control end 312, and a control block 313 is rotatably connected to the control end 312. A control groove 73 is provided on the control plate 71, and the control groove 73 is a waist-shaped groove. The length direction of the control groove 73 is parallel to the length direction of the limit groove 72. The control groove 73 and the limit groove 72 are staggered, and the staggered arrangement reduces the occupied area of ​​the control plate 71.

[0057] Reference Figure 3 The driving mechanism 4 includes a driving member 41, which is fixedly connected to the lowest end of the control board 71. The driving member 41 in the present application is a telescopic cylinder 411, the bottom end of the telescopic cylinder 411 is fixedly connected to the shell 1, and the piston rod 412 of the telescopic cylinder 411 is vertically arranged upward, and the top end of the piston rod 412 is fixedly connected to the lowest end of the control board 71.

[0058] The piston rod 412 of the telescopic cylinder 411 is driven to move downward, thereby driving the control plate 71 to move downward. The downward movement of the control plate 71 drives the rotating blade 21 to rotate, and at the same time drives the rotating plate 31 to rotate, so that the air inlet 11 and the air outlet 12 are both in an open state.

[0059] Reference Figure 3 The driving mechanism 4 further includes a thermistor 42, which is fixedly connected to a position near the condenser 5 in the housing 1. The thermistor 42 is electrically connected to the two driving members 41. When the temperature of the condenser 5 is high, the thermistor drives the driving member 41 to move, thereby driving the control board 71 to move downward. When the control board 71 moves downward, the rotating blade 21 and the rotating plate 32 are driven to rotate, thereby opening the air inlet 11 and the air outlet 12, and then the heat dissipation fan 6 starts to work.

[0060] When the cooling fan 6 stops working, the temperature of the condenser 5 decreases, and the thermistor drives the driving member 41 to reset. The reset of the driving member 41 drives the control board 71 to move upward, so that the rotating blades 21 and the rotating plate 32 block the air outlet 12 and the air inlet 11 again, thereby reducing the accumulation of external dust in the cooling fan 6, thereby reducing the possibility of damage to the cooling fan 6.

[0061] The implementation principle of the air conditioner heat dissipation fan of the embodiment of the present application is as follows: when the air conditioner starts to work, the temperature of the condenser tube rises, the thermistor 42 drives the piston rod 412 of the telescopic cylinder 411 to move downward, the piston rod 412 moves downward to drive the control plate 71 to move downward, the control plate 71 moves downward to drive the rotating blade 21 to rotate, so that the air inlet 11 is in an open state. At the same time, when the control plate 71 moves downward, it drives the rotating plate 31 to rotate, and the rotation of the rotating plate 31 drives the five rotating plates 32 to rotate, and the five rotating plates 32 rotate to open the air outlet 12.

[0062] At this time, the heat dissipation fan 6 starts to work, so that the air is continuously guided by the rotating blades 21 of the air inlet 11 into the housing 1, and the air is filtered by the filter 23, and is guided by the rotating blades 21 so that the air can be directly blown to the surface of the condenser 5, so that the heat dissipation efficiency is better. At this time, the heat dissipation fan 6 discharges the air with a higher temperature through the air outlet 12, and the protective net 13 of the air outlet 12 protects the heat dissipation fan 6.

[0063] When the cooling fan 6 stops working and the temperature of the condenser 5 decreases, the thermistor 42 drives the piston rod 412 of the telescopic cylinder 411 to move upward to reset, and the movement of the piston rod 412 drives the control plate 71 to move upward, thereby driving the rotating blades 21 to rotate, so that adjacent rotating blades 21 overlap each other, thereby blocking the air inlet 11. At the same time, the rotating plate 31 is driven to rotate, and the five rotating plates 32 are driven to rotate until they are spliced ​​together, thereby blocking the outlet.

[0064] Therefore, when the heat dissipation fan 6 is not working, the rotating blade 21 blocks the air inlet 11, and the rotating plate 32 blocks the air outlet 12. This reduces the accumulation of dust in the air on the heat dissipation fan 6, and reduces the possibility of damage to the heat dissipation fan 6.

[0065] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An air conditioning cooling fan, characterized in that: include: A housing, wherein an air inlet and an air outlet are provided on the housing; An air inlet sealing mechanism, comprising a plurality of rotating blades arranged in parallel, wherein the rotating blades are rotatably connected to the air inlet of the shell to shield the air inlet; The air outlet sealing mechanism comprises a rotating plate and a plurality of rotating plates in a circular array, the rotating plate is provided with a vent connected to the air outlet, the rotating plate is rotatably connected to the shell around the axis of the vent, one end of the rotating plate is rotatably connected to the shell, and the other end is rotatably connected to a moving block, the moving block is slidably connected to the rotating plate, the sliding direction of the moving block on the rotating plate is misaligned with the center of the vent, an inner concave surface and an outer convex surface are provided on the rotating plate, and when the moving block moves close to the center of the vent, the plurality of rotating plates move closer to each other until the inner concave surfaces and the outer convex surfaces between adjacent rotating plates fit together to block the air outlet or the vent; The driving mechanism is used to drive the plurality of rotating blades and the rotating plate to rotate synchronously.

2. The air conditioning cooling fan according to claim 1, characterized in that: The air inlet sealing mechanism further includes a fixing rod, wherein a plurality of the fixing rods are provided, and the axes of the plurality of the fixing rods are parallel and arranged on the same plane, the fixing rods are fixedly connected to the housing, the rotating blades are rotationally connected to the fixing rods in a one-to-one correspondence, and the adjacent rotating blades can overlap together; One end of the rotating blade close to the inside of the shell is rotatably connected to a lifting transmission member, the lifting transmission member is connected to the driving mechanism, and the lifting transmission member is used to synchronously drive a plurality of the rotating blades to rotate around the fixed rod.

3. The air conditioning cooling fan according to claim 2, characterized in that: The lifting transmission member includes a control plate, a limiting groove is provided on the control plate, the limiting plate is fixedly connected to the rotating blade, and the limiting plate is inserted in the limiting groove; one end of the rotating plate is rotatably connected to a control block, a control groove is provided on the control plate, and the control block is inserted in the control groove.

4. The air conditioning cooling fan according to claim 2, characterized in that: An overlap groove is formed on one end of the rotating leaf away from the lifting transmission member, a clearance groove is formed in the middle of the rotating leaf, and the overlap grooves and the clearance grooves of adjacent rotating leaves are spliced ​​together.

5. The air conditioning cooling fan according to claim 1, characterized in that: One end of the rotating blade close to the interior of the shell is bent toward the middle of the shell.

6. The air conditioning cooling fan according to claim 2, characterized in that: The air inlet sealing mechanism also includes a filter screen, a mounting hole is provided in the middle portion where the rotating blade is connected to the fixed rod, the filter screen is fixedly connected to the fixed rod through the mounting hole, a rotating groove is provided at both ends of the filter screen close to the rotating blade, a rotating block is fixedly connected to the rotating blade, and the rotating block is accommodated in the rotating groove.

7. The air conditioning cooling fan according to claim 2, characterized in that: The rotating plate is provided with a moving groove, which gradually moves away from the center of the rotating plate from one end to the other end; and the moving block is inserted in the moving groove.

8. The air conditioning cooling fan according to claim 2, characterized in that: The driving mechanism includes a driving member and a thermistor. The driving member and the thermistor are both fixedly connected in the shell. The thermistor is electrically connected to the driving member. The driving member is located at one end of the lifting transmission member and is fixedly connected to the lifting transmission member. The driving member is used to drive the lifting transmission member to move.

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