Electric fan speed control method and electric fan

Abstract

The present invention belongs to the technical field of electric fans, and specifically, is an electric fan speed control method and an electric fan, comprising a shell and a column, a motor is arranged in the shell, a fan blade seat is fixed on the rotating shaft of the motor, a fan blade is arranged on the surface of the fan blade seat, an end of the fan blade close to the fan blade seat is hinged with a tilting rod, a No. 1 top plate is fixedly connected with the tilting rod, a spring is fixedly connected between the No. 1 top plate and the fan blade seat, a No. 2 top plate is arranged at an end of the No. 1 top plate away from the tilting rod, a limiting column in the shell is fixedly connected with the inner wall of the shell, a through hole is opened in the limiting column, a push rod is sleeved in the through hole, a rotating rod is arranged at an end of the push rod away from the No. 2 top plate, a No. 1 pulley and a cam are sleeved on the rotating rod, and a No. 2 pulley is arranged inside the column. The present invention changes the angle of the cam through the cooperation between the No. 1 pulley and the No. 2 pulley, thereby adjusting the size of the air volume, so that the electric fan can adjust the size of the air volume more finely at the same rotating speed, thereby improving the use effect of the electric fan.

Description

Technical Field

[0001] The invention belongs to the technical field of electric fans, in particular to an electric fan speed control method and an electric fan. Background Art

[0002] An electric fan is a household appliance that uses an electric motor to drive the blades to rotate to accelerate the circulation of air. It is mainly used for cooling down and circulating air. It is widely used in homes, classrooms, offices, shops, hospitals, hotels and other places. Common household electric fans are essentially axial flow fans, that is, the direction of wind flow is parallel to the rotation axis of the fan blades.

[0003] When using an electric fan, an ordinary electric fan adjusts different gears to change the speed, thereby achieving the effect of reducing or increasing the air volume. However, the gears of an ordinary electric fan are divided into three gears. When people go to bed at night in autumn, due to the large temperature difference between day and night, they will reduce the speed before going to sleep. When it is adjusted to the first gear, the air volume becomes smaller, but the body surface temperature still feels hotter. When it is adjusted to the second gear, the air volume blown out increases as the speed increases. In the second half of the night, the temperature drops, which can easily cause the human body to catch a cold. It can only be adjusted in a single gear and cannot be adjusted to the appropriate air volume. It cannot meet people's needs for more precise adjustment of the air volume at the same speed, thereby reducing the use effect of the electric fan.

[0004] In view of this, in order to overcome the above technical problems, the present invention designs an electric fan speed control method and an electric fan to solve the above technical problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is: compared with the prior art, the gears of ordinary electric fans are divided into three gears, and the wind force can only be adjusted by the gear to increase the speed of the fan, so as to promote the rapid flow of indoor air, thereby strengthening the wind force. When adjusting the wind force, due to the limitation of the gear, only the wind force brought by different speeds can be adjusted, which cannot meet people's needs for more precise adjustment of the air volume at the same speed, thereby reducing the use effect of the electric fan.

[0006] The present invention provides an electric fan, comprising a housing and a column, wherein a motor is arranged in the housing, and the motor and the housing are fixedly connected via a support column;

[0007] A fan blade seat is fixedly connected to the rotating shaft of the motor, a fan blade is arranged on the surface of the fan blade seat, the number of the fan blade is more than one, and the fan blade is movably connected to the fan blade seat;

[0008] One end of the fan blade close to the fan blade seat is hinged with a tilting rod, and the tilting rod is rotatably connected to the fan blade seat;

[0009] A top plate No. 1 is provided at one end of the tilting rod away from the fan blades, and the top plate No. 1 is fixedly connected to the tilting rod;

[0010] A spring is fixedly connected between the No. 1 top plate and the fan blade seat, and a No. 2 top plate is arranged at one end of the No. 1 top plate away from the tilting rod;

[0011] The second top plate is connected to the first top plate, and a limiting column is arranged in the shell, and the limiting column is fixedly connected to the inner wall of the shell;

[0012] A through hole is provided in the limit column, a push rod is sleeved in the through hole, and one end of the push rod is fixedly connected to the second top plate;

[0013] A rotating rod is arranged at one end of the push rod away from the second top plate, and the rotating rod is rotatably connected to the housing;

[0014] The rotating rod is sleeved with a first belt pulley and a cam, and the first belt pulley, the cam and the rotating rod are fixedly connected;

[0015] A second pulley is arranged inside the column, a self-locking rocker is sleeved inside the second pulley, the second pulley is fixedly connected to the self-locking rocker, and the self-locking rocker is rotatably connected to the column;

[0016] The second belt pulley is rotationally connected to the first belt pulley via a belt.

[0017] Preferably, the second top plate is provided with grooves, the number of the grooves is more than one, and a roller is provided in the groove.

[0018] Preferably, the support column, tilt rod, top plate No. 1, top plate No. 2, push rod and limit column are all made of light alloy.

[0019] Preferably, a sliding buckle groove is provided on the inner wall of the column, a buckle is sleeved in the sliding buckle groove, and the buckle is slidably connected to the sliding buckle groove.

[0020] Preferably, one end of the column away from the shell is hinged to the base, and a slot is provided on the base.

[0021] A method for controlling the speed of an electric fan is used to control the speed of the electric fan described above, wherein the method for controlling the speed of the electric fan adopts a tap-type speed regulation.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The present invention provides an electric fan speed control method and an electric fan, wherein the limit column of the push rod is coated with lubricating oil to reduce the friction between the push rod and the limit column and extend the service life of the electric fan, the push rod pushes the No. 2 top plate to move forward, the No. 2 top plate pushes the No. 1 top plate to move forward, the tilting rod on the No. 1 top plate is also pushed forward, and the tilting rod pushes the fan blades to adjust to a suitable angle. After the fan blade angle changes, the wind force also changes accordingly, and the wind force reaches the required requirement. When adjusting the fan blade angle, the operation is simple and convenient, thereby improving the use effect of the electric fan.

[0024] 2. The present invention provides an electric fan speed control method and an electric fan, wherein the roller in the groove on the No. 2 top plate fits with the No. 1 top plate, and the roller and the No. 1 top plate cooperate with each other to reduce the friction between the two top plates, extend the service life of the electric fan, and improve the use effect of the electric fan.

[0025] 3. The present invention provides an electric fan speed control method and an electric fan, wherein the column can rotate in clockwise and counterclockwise directions, and the column can be adjusted according to the required height through the cooperation between the internal buckle and the sliding buckle groove, which makes the operation more convenient and further improves the use effect of the electric fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Figure 1 It is the main figure of the present invention;

[0028] Figure 2 is a cross-sectional view of the present invention;

[0029] Figure 3 is a top view of the shell;

[0030] Figure 4 yes Figure 3 A large picture is posted at center A;

[0031] In the figure: housing 1, folding column 2, motor 11, support column 12, fan blade seat 13, fan blade 14, tilting rod 15, No. 1 top plate 151, spring 152, No. 2 top plate 16, limiting column 17, through hole 171, push rod 161, rotating rod 18, No. 1 pulley 181, cam 182, No. 2 pulley 21, belt 183, groove 162, roller 163, slide buckle groove 22, buckle 23, self-locking rocker 24, base 3, and clamping groove 31; DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0033] The present invention provides an electric fan, comprising a housing 1 and a column 2, wherein a motor 11 is disposed in the housing 1, and the motor 11 is fixedly connected to the housing 1 via a support column 12;

[0034] A fan blade seat 13 is fixedly connected to the rotating shaft of the motor 11, and a fan blade 14 is arranged on the surface of the fan blade seat 13. The number of the fan blade 14 is more than one, and the fan blade 14 is movably connected to the fan blade seat 13;

[0035] One end of the fan blade 14 close to the fan blade seat 13 is hinged with a tilting rod 15, and the tilting rod 15 is rotatably connected to the fan blade seat 13;

[0036] A first top plate 151 is disposed at one end of the tilting rod 15 away from the fan blade 14, and the first top plate 151 is fixedly connected to the tilting rod 15;

[0037] A spring 152 is fixedly connected between the first top plate 151 and the fan blade seat 13, and a second top plate 16 is arranged at one end of the first top plate 151 away from the tilt rod 15;

[0038] The second top plate 16 is connected to the first top plate 151, and a limiting column 17 is arranged in the housing 1, and the limiting column 17 is fixedly connected to the inner wall of the housing 1;

[0039] A through hole 171 is formed in the limit column 17, a push rod 161 is sleeved in the through hole 171, and one end of the push rod 161 is fixedly connected to the second top plate 16;

[0040] A rotating rod 18 is disposed at one end of the push rod 161 away from the second top plate 16, and the rotating rod 18 is rotatably connected to the housing 1;

[0041] The rotating rod 18 is sleeved with a first pulley 181 and a cam 182, and the first pulley 181, the cam 182 and the rotating rod 18 are fixedly connected;

[0042] A second pulley 21 is disposed inside the column 2, a self-locking rocker 24 is sleeved inside the second pulley 21, the second pulley 21 is fixedly connected to the self-locking rocker 24, and the self-locking rocker 24 is rotatably connected to the column 2;

[0043] The second pulley 21 is rotatably connected to the first pulley 181 via a belt 183 .

[0044] When the fan switch button is pressed and the fan blades 14 rotate, if the wind speed needs to be adjusted, the angle of the second pulley 21 is adjusted by adjusting the angle of the self-locking rocker 24 outside the column 2, which drives the belt 183 to rotate, so that the first pulley 181 in the housing 1 drives the second pulley 21 to start rotating through the belt 183, the second pulley 21 drives the rotating rod 18 to rotate, the rotating rod 18 drives the cam 182 to rotate, and the cam 182 causes the push rod 161 to move forward during the rotation process, the push rod 161 pushes the second top plate 16 to move forward, the second top plate 16 pushes the first top plate 151 to move forward, and the tilting rod 15 on the first top plate 151 is also pushed forward. The tilt rod 15 pushes the fan blade 14 to adjust a suitable angle. After the angle of the fan blade 14 changes, the wind force also changes accordingly. The wind force reaches the required requirement. When adjusting the angle of the fan blade 14, the operation is simple and convenient, thereby improving the use effect of the electric fan. The spring 152 fixedly connected between the surface of the No. 1 top plate 151 and the fan blade seat 13 is squeezed, and the spring 152 is deformed under the action of the No. 1 top plate 151. When pushing, it is restricted by the spring 152, and the pushing angle will not cause the No. 1 top plate 151 to contact with the fan blade seat 13 due to improper operation, causing an accident, thereby improving the accuracy of the adjustment of the fan blade 14. At the same time, under the action of the buffer force, the rotation of the fan is more stable;

[0045] When a larger wind force is not needed, the angle of the self-locking rocker 24 outside the column 2 is reversed to adjust the angle of the second pulley 21, which drives the belt 183 to rotate, so that the first pulley 181 in the housing 1 drives the second pulley 21 to start rotating through the belt 183, and the second pulley 21 drives the rotating rod 18 to rotate, and the rotating rod 18 drives the cam 182 to rotate. With the change of the angle of the cam 182, the spring 152 fixedly connected between the surface of the first top plate 151 and the fan blade seat 13 changes from extrusion to tension, and the spring 152 pushes the first top plate 151 backward, and the tilting rod 15 on the first top plate 151 is also pulled backward, and the tilting rod 15 pulls the fan blade 14 to adjust the appropriate angle, the fan blade 14 resets, and the wind force becomes smaller. After the angle of the fan blade 14 changes, the wind force also changes accordingly, and the wind force meets the required requirements. When adjusting the angle of the fan blade 14, the operation is simple and convenient, thereby improving the use effect of the electric fan;

[0046] Compared with the prior art, the size of the wind force can only be adjusted by the gear position, so that the speed of the fan is accelerated, so that the indoor air flows quickly, and the wind force becomes stronger. When adjusting the wind force, due to the limitation of the gear position, only the wind force brought by different speeds can be adjusted, which cannot meet people's needs for more precise adjustment of the air volume at the same speed;

[0047] The present invention can adjust the wind force by adjusting the speed of the motor 11 in the same way as the prior art, and can also change the rotation angle of the cam 182 by the cooperation between the first pulley 181 and the second pulley 21, thereby adjusting the angle of the fan blade 14, so that the electric fan can adjust the wind volume more precisely at the same speed;

[0048] In the present invention, lubricating oil is coated inside the limiting column 17 of the push rod 161 to reduce the friction between the push rod 161 and the limiting column 17 and extend the service life of the electric fan.

[0049] As a specific implementation of the present invention, a groove 162 is formed on the second top plate 16 , the number of the groove 162 is more than one, and a roller 163 is disposed in the groove 162 .

[0050] When the electric fan is working, the roller 163 in the groove 162 on the No. 2 top plate 16 fits with the No. 1 top plate 151, and the roller 163 and the No. 1 top plate 151 cooperate with each other to reduce the friction between the No. 1 top plate 151 and the No. 2 top plate 16, thereby extending the service life of the electric fan and improving the use effect of the electric fan.

[0051] As a specific implementation of the present invention, the support column 12, the tilting rod 15, the first top plate 151, the second top plate 16, the push rod 161 and the limit column 17 are all made of light alloy.

[0052] The support 12, the tilting rod 15, the first top plate 151, the second top plate 16, the push rod 161 and the limit column 17 in the electric fan are all made of light alloys, such as aluminum alloy, etc., to reduce the weight of the electric fan head and prevent the fan head from tipping over due to excessive weight when the electric fan rotates.

[0053] As a specific implementation of the present invention, a sliding buckle groove 22 is provided on the inner wall of the column 2, a buckle 23 is sleeved in the sliding buckle groove 22, and the buckle 23 is slidably connected to the sliding buckle groove 22.

[0054] When using the electric fan, the column 2 is pulled upward, and the buckle 23 inside the column 2 slides upward along the sliding buckle slot 22. When it slides to the required position, the column 2 only needs to be rotated clockwise, and the buckle 23 is engaged with the sliding buckle slot 22, and the height of the column 2 is fixed. When the electric fan is too high, the column 2 only needs to be lifted upward and then rotated counterclockwise, and the buckle 23 is disengaged from the sliding buckle slot 22, and the height of the fan is lowered, so that the column 2 can be adjusted according to the required height, which is more convenient to operate and further improves the use effect of the electric fan.

[0055] As a specific implementation of the present invention, one end of the column 2 away from the housing 1 is hinged to the base 3 , and a slot 31 is provided on the base 3 .

[0056] When the electric fan is not needed, we can hinge the column 2 and the base 3 and rotate the column 2 of the electric fan to place it in the slot 31. The electric fan is folded again to reduce its size. The base 3 is rotated 90° to the left so that the plane of the base 3 of the electric fan contacts the ground. The head of the electric fan is turned upside down and placed in a corner of the room, which can save extra space and is more convenient to use.

[0057] A method for controlling the speed of an electric fan is used to control the speed of the electric fan described above, wherein the method for controlling the speed of the electric fan adopts a tap-type speed regulation.

[0058] The tap-type speed regulation in the present invention is to change the number of coil turns of the input circuit to change the strength of the magnetic field generated thereby to change the speed of the motor 11, thereby controlling the speed of the electric fan. The tap-type speed regulation is a prior art and will not be described in detail herein.

[0059] The specific workflow is as follows:

[0060] When the fan switch button is pressed and the fan blades 14 rotate, if the wind speed needs to be adjusted, the angle of the second pulley 21 is adjusted by adjusting the angle of the self-locking rocker 24 outside the column 2, which drives the belt 183 to rotate, so that the first pulley 181 in the housing 1 drives the second pulley 21 to start rotating through the belt 183, the second pulley 21 drives the rotating rod 18 to rotate, the rotating rod 18 drives the cam 182 to rotate, and the cam 182 causes the push rod 161 to move forward during the rotation process, the push rod 161 pushes the second top plate 16 to move forward, the second top plate 16 pushes the first top plate 151 to move forward, and the tilting rod 15 on the first top plate 151 is also pushed forward. The tilt rod 15 pushes the fan blade 14 to adjust a suitable angle. After the angle of the fan blade 14 changes, the wind force also changes accordingly. The wind force reaches the required requirement. When adjusting the angle of the fan blade 14, the operation is simple and convenient, thereby improving the use effect of the electric fan. The spring 152 fixedly connected between the surface of the No. 1 top plate 151 and the fan blade seat 13 is squeezed, and the spring 152 is deformed under the action of the No. 1 top plate 151. When pushing, it is restricted by the spring 152, and the pushing angle will not cause the No. 1 top plate 151 to contact with the fan blade seat 13 due to improper operation, causing an accident, thereby improving the accuracy of the adjustment of the fan blade 14. At the same time, under the action of the buffer force, the rotation of the fan is more stable;

[0061] When a larger wind force is not needed, the angle of the self-locking rocker 24 outside the column 2 is reversed to adjust the angle of the second pulley 21, which drives the belt 183 to rotate, so that the first pulley 181 in the housing 1 drives the second pulley 21 to start rotating through the belt 183, and the second pulley 21 drives the rotating rod 18 to rotate, and the rotating rod 18 drives the cam 182 to rotate. With the change of the angle of the cam 182, the spring 152 fixedly connected between the surface of the first top plate 151 and the fan blade seat 13 changes from extrusion to tension, and the spring 152 pushes the first top plate 151 backward, and the tilting rod 15 on the first top plate 151 is also pulled backward, and the tilting rod 15 pulls the fan blade 14 to adjust the appropriate angle, the fan blade 14 resets, and the wind force becomes smaller. After the angle of the fan blade 14 changes, the wind force also changes accordingly, and the wind force meets the required requirements. When adjusting the angle of the fan blade 14, the operation is simple and convenient, thereby improving the use effect of the electric fan;

[0062] Compared with the prior art, the size of the wind force can only be adjusted by the gear position, so that the speed of the fan is accelerated, so that the indoor air flows quickly, and the wind force becomes stronger. When adjusting the wind force, due to the limitation of the gear position, only the wind force brought by different speeds can be adjusted, which cannot meet people's needs for more precise adjustment of the air volume at the same speed;

[0063] The present invention can adjust the wind force by adjusting the speed of the motor 11 in the same way as the prior art, and can also change the rotation angle of the cam 182 by the cooperation between the first pulley 181 and the second pulley 21, thereby adjusting the angle of the fan blade 14, so that the electric fan can adjust the wind volume more precisely at the same speed;

[0064] In the present invention, the limit column 17 of the push rod 161 is coated with lubricating oil to reduce the friction between the push rod 161 and the limit column 17, thereby extending the service life of the electric fan;

[0065] When the electric fan is working, the roller 163 in the groove 162 on the second top plate 16 fits with the first top plate 151, and the roller 163 and the first top plate 151 cooperate with each other to reduce the friction between the first top plate 151 and the second top plate 16, thereby extending the service life of the electric fan and improving the use effect of the electric fan;

[0066] The support 12, the tilting rod 15, the first top plate 151, the second top plate 16, the push rod 161 and the limit column 17 in the electric fan are all made of light alloys, such as aluminum alloy, etc., to reduce the weight of the electric fan head and prevent the fan head from tipping over due to excessive weight when the electric fan rotates;

[0067] When using the electric fan, the column 2 is pulled upward, and the buckle 23 inside the column 2 slides upward along with the sliding buckle slot 22. When it slides to the required position, the column 2 only needs to be rotated clockwise, and the buckle 23 is engaged with the sliding buckle slot 22, and the height of the column 2 is fixed. When the electric fan is too high, the column 2 only needs to be lifted upward and then rotated counterclockwise, and the buckle 23 is disengaged from the sliding buckle slot 22, and the height of the fan is lowered, so that the column 2 can be adjusted according to the required height, which is more convenient to operate and further improves the use effect of the electric fan.

[0068] When the electric fan is not needed, the column 2 of the electric fan can be placed in the slot 31 by rotating the hinge between the column 2 and the base 3, and the electric fan is folded again to reduce the volume. The base 3 is rotated 90° to the left so that the plane of the base 3 of the electric fan contacts the ground. The head of the electric fan is inverted and placed in a corner of the room, which can save extra space and is more convenient to use.

[0069] The tap-type speed regulation in the present invention is to change the number of coil turns of the input circuit to change the strength of the magnetic field generated thereby to change the speed of the motor 11, thereby controlling the speed of the electric fan. The tap-type speed regulation is a prior art and will not be described in detail herein.

[0070] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An electric fan, characterized in that: It comprises a shell (1) and a column (2); a motor (11) is arranged in the shell (1); the motor (11) and the shell (1) are fixedly connected via a support column (12); A fan blade seat (13) is fixedly connected to the rotating shaft of the motor (11), a fan blade (14) is provided on the surface of the fan blade seat (13), the number of the fan blade (14) is more than one, and the fan blade (14) is movably connected to the fan blade seat (13); An end of the fan blade (14) close to the fan blade seat (13) is hingedly connected with a tilting rod (15), and the tilting rod (15) is rotatably connected to the fan blade seat (13); A first top plate (151) is provided at one end of the tilting rod (15) away from the fan blade (14), and the first top plate (151) is fixedly connected to the tilting rod (15); A spring (152) is fixedly connected between the first top plate (151) and the fan blade seat (13), and a second top plate (16) is provided at one end of the first top plate (151) away from the tilting rod (15); The second top plate (16) is connected to the first top plate (151), a limiting column (17) is arranged in the shell (1), and the limiting column (17) is fixedly connected to the inner wall of the shell (1); A through hole (171) is provided in the limiting column (17), a push rod (161) is sleeved in the through hole (171), and one end of the push rod (161) is fixedly connected to the second top plate (16); A rotating rod (18) is provided at one end of the push rod (161) away from the second top plate (16), and the rotating rod (18) is rotatably connected to the housing (1); The rotating rod (18) is sleeved with a first belt pulley (181) and a cam (182), and the first belt pulley (181), the cam (182) and the rotating rod (18) are fixedly connected; A second belt pulley (21) is arranged inside the column (2), a self-locking rocker (24) is sleeved inside the second belt pulley (21), the second belt pulley (21) is fixedly connected to the self-locking rocker (24), and the self-locking rocker (24) is rotatably connected to the column (2); The second belt pulley (21) is rotationally connected to the first belt pulley (181) via a belt (183).

2. An electric fan according to claim 1, characterized in that: The second top plate (16) is provided with a groove (162), the number of the groove (162) is more than one, and a roller (163) is provided in the groove (162).

3. An electric fan according to claim 1, characterized in that: The support column (12), the tilting rod (15), the first top plate (151), the second top plate (16), the push rod (161) and the limiting column (17) are all made of light alloy.

4. An electric fan according to claim 1, characterized in that: The inner wall of the column (2) is provided with a sliding buckle groove (22), a buckle (23) is sleeved in the sliding buckle groove (22), and the buckle (23) is slidably connected to the sliding buckle groove (22).

5. The electric fan according to claim 1, characterized in that: One end of the column (2) away from the housing (1) is hinged to the base (3), and a slot (31) is provided on the base (3).

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