CN107725445A - A kind of electric fan for automatically adjusting wind-force and inverting wind direction - Google Patents

Abstract

The invention provides an electric fan that can automatically adjust the wind force and reverse the wind direction. By connecting a single-chip microcomputer that can control the reverse rotation of the electric fan to the motor of the electric fan, the steering of the motor can be changed so that the wind direction becomes the opposite wind direction. The blade structure is designed with an independent single-piece structure fan blade, which is installed on a collar set on the motor shaft. The blade transmission rod is covered with a fixed gear, and the rotation angle is controlled by a micro motor to change the blade. The operation design of the angle further improves the wind force and direction of the air supply. When the fan is powered on, the infrared sensor device is activated, and the position of the human body is sensed, such as the human body is on the back of the fan air supply direction. The control system controls the state of the single-chip microcomputer to realize motor feedback. Rotate, and start the micro-motor to change the angle of the fan blades, realize the reversal of the fan's wind direction, solve the problem of a single wind direction of the electric fan, and solve the troublesome and laborious problem of turning the fan's wind direction when it needs to blow in the opposite direction in a small space .

Description

An electric fan that can automatically adjust the wind force and reverse the wind direction

Technical field:

The invention belongs to the technical field of household appliances and relates to an electric fan capable of automatically adjusting wind force and reversing wind direction.

Background technique:

When blowing the fan, there will be a big trouble. In many scenarios, the space we are in only allows one fan to be placed. Although the fan now has the function of swinging the head, when the fan is blown in the reverse position , you need to manually adjust, especially in the case of a very compact space, it will be very troublesome, although some existing fans can rotate the wind direction 360 degrees, but for a wind direction that needs to be reversed, the 360-degree wind direction , it seems too wasteful, just like the fan is placed in the bedroom, between the desk and the bed, when the office is over and you want to lie on the bed, you have to manually turn the fan and turn the direction of the air outlet back to the bed , so it becomes troublesome.

Invention content:

The object of the present invention is to provide an electric fan that can automatically adjust the wind force and reverse the wind direction in view of the deficiencies in the prior art. In the present invention, the motor of the electric fan is connected with a single-chip microcomputer that can control the reverse rotation of the motor, and the steering of the motor is changed, so that the wind direction of the fan is changed into the opposite wind direction, and then the structure of the fan blades is changed to make the wind force and direction of the air supply It is further changed; at the same time, the wind force is automatically adjusted through the control system to reach the appropriate temperature for the human body.

In order to achieve the above object, the present invention adopts the following technical solutions: an electric fan that can automatically adjust the wind force and reverse the wind direction, including fan blades, micro motors, motors, fan support frames and control systems; the motor is installed on the fan On the support frame, a circular collar and a 360-degree rotating connecting ring are provided at the end of the motor shaft, and a fixing device is provided at the tail end; a concave drill hole is provided on the circular collar, and a micro motor is provided on the ring wall; The fan blade is an independently installed fan blade, and the bottom end of the fan blade is provided with a transmission rod with a large gear; the transmission rod is fixed and supported through the concave drill hole on the circular collar, and the large gear of the transmission rod It meshes with the small gear at the end of the rotating shaft of the micro motor. The circumference of the large gear is twice that of the small gear. When the small gear rotates one circle, the large gear rotates half a circle, and the fan blade rotates with the transmission rod to form an angle of 180 degrees. Transformation, and then make the wind power of the fan change with the change of the angle through the linkage control of the fan blade angle change; the control system is provided with a single-chip microcomputer to control the forward and reverse rotation and speed of the motor, and control the steering and speed of the motor.

The fan support frame is two concave brackets, and the fixed ends of the brackets are respectively installed on the fixing device and the fixed ends of the 360-degree rotating connecting ring; and an infrared sensor is arranged on the front and rear sides respectively.

The fan supporting frame is also provided with a temperature sensor, and the control system is provided with a frequency converter connected with the motor.

The 360-degree rotating connecting ring is provided with a ring-shaped 360-degree connecting line device.

The two concave brackets are respectively equipped with swivels that can rotate 45 degrees, and the fixed end is expanded 45 degrees outward to form an equilateral with the central axis of the two brackets at 90 degrees and the ground at 45 degrees. Right triangle architecture pattern.

The terminals of the micro-motor are connected with a ring-shaped 360-degree transfer wiring device.

A plastic pressing block is attached to the concave area of the concave drilling to fix the fan blade.

The two concave brackets are rectangular concave brackets. After enough space is left for the fan cover, a bottom plate that can be flipped out on both sides is attached to the bracket to realize anastomosis and docking, and the two brackets constitute A complete triangular support frame. Function keys for the fan function are arranged on the bottom plate that can be flipped out.

Design principle of the present invention is:

Install an independent single-piece structure fan blade. When the rotation direction of the motor changes, the structure of the fan blade also changes, thereby making a more suitable wind effect, and through the infrared sensor device, the human body position is recognized, and the fan automatically judges , reverse the wind direction of the fan at any time.

Wind direction change: The motor steering is controlled by a single-chip microcomputer that can control the motor to reverse, so that the wind direction of the fan can be changed into the opposite wind direction.

Wind force adjustment: The temperature collected by the temperature sensor is fed back to the single-chip microcomputer through the control system. When the temperature is lower than the suitable temperature of the human body, the single-chip microcomputer feeds back the command to reduce the wind force to the control system, and the control system controls the motor speed to reduce the wind force by controlling the frequency converter. , to slow down the air flow, so as not to drop the temperature too fast; on the contrary, when the temperature is too high, the control system controls the frequency converter to control the motor speed to increase the wind force, speed up the air flow, speed up the temperature drop, and reach the suitable temperature of the human body.

The change of the main structure of the fan is as follows: add a circular collar that can be installed on the motor at the place where the fan blade is installed, so that the fan blade does not need to be directly installed on the rotating shaft of the motor, and the direction of the adapter ring extends toward the middle of the motor. Get an effect that the fan blade can be in the middle of the motor, so that both sides of the fan look like the front of the fan.

Variable fan blade structure design: the fan blade is an independently installed fan blade, and the bottom end of the fan blade is provided with a transmission rod with a large gear; the transmission rod is drilled through the concave hole on the circular collar Fixed support, the large gear of the transmission rod meshes with the small gear at the end of the rotating shaft of the micro motor. The circumference of the large gear is twice that of the small gear. When the small gear rotates a circle, the large gear rotates half a circle, and the fan blades follow the transmission. The rod rotates to form a 180-degree angle change, and then through the linkage control of the fan blade angle change, the front air supply effect is completely transplanted to the back;

Fan Appearance: Changing the common fan appearance to one with both sides being the front of the fan, so as to obtain the effect that both sides are the front of the fan.

The fan support frame is designed in a triangular style, which not only ensures safety, but also produces a certain aesthetic effect.

Advantages of the present invention:

By changing the rotation direction of the motor and the rotation of the fan blades, the front blowing effect of the fan is perfectly transferred to the back of the fan to achieve the functional effect regardless of the front and back. The position of the human body sensed by the infrared sensing device, such as the human body in the fan On the back side of the air supply direction, the control system automatically realizes the fan’s wind direction reversal by controlling the motor to reverse and starting the micro motor to change the angle of the fan blade. When blowing in the wind direction, you need to manually turn the fan to blow the air. At the same time, the wind power is automatically adjusted through the control system to reach the appropriate temperature of the human body, which is beneficial to people's rest and sleep.

Description of drawings:

Fig. 1 is the front view structure schematic diagram of the present invention;

Fig. 2 is a fan motor of the present invention, a fan blade, and a circular collar, and a 360-degree rotating connecting ring and other device connection side enlarged schematic diagrams;

Fig. 3 is a front view of the fan blade structure;

Fig. 4 and Fig. 5 are respectively a partial enlarged view of the connection between the large gear at the fan blade end and the small gear at the end of the micro-motor and a connection diagram between the gears; Fig. 6 is a schematic diagram of the enlarged top view structure of the concave hole of the circular collar;

Fig. 7 is a schematic side view of the fan support frame.

Micromotor 1, large gear 2, pinion 3, 360-degree rotating connection ring 4, motor 5, fixing device 6, circular collar 7, fan support frame 8, collar 360-degree transfer wiring device 9, transmission rod 10.

detailed description:

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

Example:

The present invention is an electric fan that can automatically adjust wind force and reverse wind direction, an electric fan that can automatically adjust wind force and reverse wind direction, including fan blades, micro motors, motors, fan support frames 8 and a control system; this implementation For example, design a fan with three blades. Connect a single-chip microcomputer that can control the reverse rotation and speed of the motor to the motor 5 of the electric fan to change the rotation and speed of the motor, so that the wind direction of the fan changes to the opposite wind direction, and at the same time The speed can be controlled.

The motor 5 is installed on the fan support frame 8, the motor 5 shaft end is provided with a circular collar 7 and a 360-degree rotating connecting ring 4, and the tail end is provided with a fixing device 6;

The circular collar 7 is provided with a concave drill hole, and the ring wall is provided with a micro motor 1;

The control system is provided with a single-chip microcomputer for controlling the positive and negative rotation of the electric motor (5);

The fan support frame 8 is two concave brackets, and the fixed ends of the brackets are respectively installed on the fixed ends of the fixing device 6 and the 360-degree rotating connecting ring 4; and an infrared sensor is respectively arranged on the front and rear sides;

The fan support frame is also provided with a temperature sensor; the control system is provided with a frequency converter connected to the motor;

The fan blade is an independently installed fan blade, and the bottom end of the fan blade is provided with a transmission rod 10 with a large gear; the transmission rod 10 is fixedly supported by the concave bore hole on the circular collar 7, and the transmission rod The large gear of 10 is interlocked with the small gear at the end of the rotating shaft of the micro-motor 1. The circumference of the large gear is twice that of the small gear. When the small gear rotates one circle, the large gear rotates half a circle, and the fan blades follow the transmission rod 10 Rotate to form a 180-degree angle change, and then make the wind force of the fan change with the angle change through linkage control of the fan blade angle change;

The infrared sensor is started after the fan is powered on, and is used to sense changes in the position of the human body. When it senses that the human body is around the back of the fan, it sends a signal to the control system, and the control system controls the motor to rotate in reverse, and starts the micro The motor is used to change the angle of the fan blade;

The temperature collected by the temperature sensor is fed back to the single-chip microcomputer through the control system. When the temperature is lower than the suitable temperature of the human body, the single-chip microcomputer feeds back the instruction of reducing the wind force to the control system, and the control system controls the motor speed by controlling the frequency converter. Air fluidity, so as not to drop the temperature too fast; on the contrary, when the temperature is too high, the control system controls the frequency converter to control the motor speed to increase the wind force, speed up the air fluidity, accelerate the temperature drop, and reach the suitable temperature of the human body.

The 360-degree rotating connection ring 4 is provided with a ring-shaped 360-degree transfer wiring device 9;

The two concave brackets are respectively equipped with swivels that can rotate 45 degrees, and the fixed end is expanded 45 degrees outward to form an equilateral with the central axis of the two brackets at 90 degrees and the ground at 45 degrees. right triangle architecture pattern;

The terminal of the micro-motor 1 is connected to a ring-shaped 360-degree transfer wiring device 9;

A plastic pressing block is attached to the concave area of the concave drilling to fix the fan blade;

The two concave brackets are rectangular concave brackets. After enough space is left for the fan cover, a bottom plate that can be flipped out on both sides is attached to the bracket to realize anastomosis and docking, and the two brackets constitute A complete triangular support frame. Function keys for the fan function are arranged on the bottom plate that can be flipped out.

Motor 5 installation method:

Remove the common supporting rod installed at the tail of the motor in the past, and replace it with a fixed support method at both ends of the motor. One end of the motor shaft is covered with a circular collar 7 and a 360-degree rotating connecting ring 4; the 360-degree rotating connecting ring 4. One side is connected to the rotating shaft of the motor 5, and the other side is connected to the fixed end of the fan support frame 15 for fixed support; the tail end of the motor 5 is fixed by a fixing device 6, and connected to the fixed end of the other support rod of the fan for fixed support;

The circular collar 7 is in the shape of a mostly hollowed-out cylinder, and three concave holes are drilled in the same arc ratio on the ring wall of the circular collar 7, and then a plastic is formed on the concave area. The pressing block fixes and supports the fan blade;

Then by changing the structure of the fan blades, the wind force of the air supply is changed by changing the structure of the fan blades. The design of the change of the fan blade structure: the fan blades described in this embodiment are independently installed fan blades. 10 is inserted into the concave borehole on the ring wall of the circular collar 7 to fix the transmission rod 10 through the concave borehole on the circular collar 7 for fixed support. The small gears mesh with each other, and the circumference of the large gear is twice that of the small gear. The small gear rotates one circle, and the large gear rotates half a circle. The linkage control fan blade angle change makes the fan wind force change with the angle change; the independent fan blades are all independently equipped with a micro motor 1 to control the angle change; Connection, the ring-shaped 360-degree transfer wiring device 9 is fixed on the wall of the 360-degree rotating connection ring 4, which is used to ensure that the micro-motor 1 will not be wound when the electric fan motor 5 rotates; and then connected to the control board through wiring , set the switch; through the switch, the rotation of the micro motor 1 is controlled, and then the transformation of the fan blade angle is solved.

The design of the fan support frame 15: a triangular style design is adopted, and the fan is supported by the stabilizing function of the triangular structure. The specific realization is: at the fixed ends on both sides of the fan, that is, at the fixed points of the front and rear ends of the motor 5, two concave brackets are installed. The brackets are equipped with a swivel that can be rotated by 45 degrees. The two brackets are respectively expanded by 45 degrees from the fixed end of the fan to form an equilateral right angle with the central axis of the two brackets at 90 degrees and the ground at 45 degrees. Triangular structure mode; the concave bracket is a rectangular concave bracket. After leaving enough space for the fan cover 17, there is a bottom plate that can be flipped out in the two brackets to achieve anastomotic docking, and the two brackets form a complete The triangular support frame ensures the support of the fan; the control switch of the fan function is equipped with function keys. At the same time, this support structure can hollow out a hand-holding position on the bottom plate. When the support is folded, it can be used as a portable handle for Hold the fan.

Claims (3)

1. An electric fan that can automatically adjust the wind force and reverse the wind direction, including fan blades, a motor (5), a fan support frame (8) and a control system; the front and rear sides of the fan support frame (8) are respectively set There is an infrared sensor; the fan support frame (8) is also provided with a temperature sensor; the motor (5) is installed on the fan support frame (8); A single-chip microcomputer for rotation and speed; the end of the motor (5) is provided with a circular collar (7) and a 360-degree rotating connecting ring (4), and the tail end is provided with a fixing device (6); it is characterized in that: A circular collar (7) is provided with a concave drill hole, a micro motor (1) is provided on the ring wall, and a small gear (3) is provided on the rotating shaft of the micro motor (1); the fan blade is an independent type fan blade, the bottom end of which is provided with a transmission rod (10), and the transmission rod (10) is fixed and supported through the concave drill hole on the circular collar (7); and the end of the transmission rod (10) is provided with a large Gear (2); the large gear (2) of the transmission rod 10 meshes with the pinion (3) on the rotating shaft of the micromotor (1), and the circumference of the large gear (2) is equal to the circumference of the pinion (3). Two times, that is, the small gear (3) rotates one circle, the large gear (2) rotates half a circle, and the fan blade rotates with the transmission rod (10), realizing an angle change of 180 degrees; the fan support frame (8 ) are two concave brackets, and the fixed ends of the two concave brackets are respectively installed on the fixing device (6) and the fixed end of the 360-degree rotating connecting ring (4); the 360-degree rotating connecting ring (4) There is a ring-shaped 360-degree transfer wiring device (9); the micro-motor (1), the ring-shaped 360-degree transfer wiring device (9), the motor (5), the single-chip microcomputer, the infrared sensor and the temperature sensor are respectively It is connected with the control system; the control system also includes a frequency converter connected with the motor. 2. The electric fan that can automatically adjust the wind force and reverse the wind direction according to claim 1, characterized in that: the terminal of the micro-motor (1) is connected to the ring-shaped 360-degree transfer wiring device (9) to prevent the micro-motor from The motor (1) is wound. 3. The electric fan capable of automatically adjusting the wind force and reversing the wind direction according to claim 1, characterized in that: the concave area of the concave drilled hole fits a plastic pressing block to fix the fan blade.