Blade, fan and adjustment method thereof

Abstract

This invention discloses a blade, a fan, and an adjustment method thereof. The blade is mounted on a rotating shaft and includes a fixed blade, a movable blade, and an adjustment device arranged axially. The movable blade and the fixed blade are connected by a tough material. The adjustment device includes a wheel cylinder fitted on the rotating shaft, with the movable blade rigidly connected to the outer side of the wheel cylinder. The adjustment device includes an airflow sensor and a controller. Compared with the prior art, this application adjusts the rotation angle of the movable blade by adjusting the adjustment device, changing the angle between the movable blade and the fixed blade, thereby changing the airflow. This achieves airflow control, ensuring the fan always operates at its optimal efficiency point, and realizes simplified and highly energy-efficient airflow control.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a blade, a fan and an adjustment method thereof. Background Art

[0002] In today's society, the contradiction between economic development and resources and environment is becoming increasingly acute, and energy conservation and emission reduction has become a national policy. The state requires that the operating efficiency of fans should not be less than 70%, but the current average operating efficiency of fans is only 40% to 60%. Therefore, research on energy-saving operation of fans is very necessary. At present, the adjustment of fan air volume mainly relies on the speed regulation of the motor, which is one of the important ways to save energy for fans. However, whether it is a variable frequency motor or a tap motor, the motor has only a small optimal operating range during the speed regulation process. Therefore, in certain speed ranges, the efficiency of the fan is very low, which easily causes energy waste. Summary of the invention

[0003] The present invention provides a blade, a fan and an adjustment method thereof, which solves the problem that the fan air volume adjustment method is single and the operation efficiency of the fan is low in the prior art.

[0004] The technical solution adopted by the present invention is: a blade, which is installed on a rotating shaft, and the blade includes: a fixed blade; a movable blade movably connected to the fixed blade in the axial direction of the rotating shaft; and an adjusting device connected to the side of the movable blade away from the fixed blade to drive the movable blade to rotate along the rotating shaft.

[0005] Furthermore, the movable blades and the fixed blades are connected via a tough material.

[0006] Furthermore, the adjusting device comprises a wheel barrel mounted on the rotating shaft, and the movable blades are rigidly connected to the outer side of the wheel barrel.

[0007] Furthermore, the wheel drum is threadedly connected to the rotating shaft, and the adjusting device also includes a driving device for driving the wheel drum to rotate.

[0008] Furthermore, the regulating device also includes: an air volume sensor, and a controller connected to the air volume sensor, wherein the controller is drivingly connected to the wheel drum to adjust the rotation angle of the movable blade according to the air volume.

[0009] Preferably, the rotation angle of the movable blade is 0 to 45°.

[0010] A fan comprises the blades as described above.

[0011] A method for adjusting a fan, the method comprising: detecting the air volume of the fan at current power, and preferentially adjusting the angle between the movable blade and the fixed blade according to the difference between the detected air volume value and a preset air volume value to increase the air volume.

[0012] Furthermore, when the angle between the movable blade and the fixed blade is adjusted to the maximum, if the detected air volume value still does not reach the preset air volume value, the output power of the fan is increased to increase the air volume to the preset air volume value.

[0013] Compared with the prior art, the present application adjusts the rotation angle of the movable blades through an adjusting device, changes the angle between the movable blades and the fixed blades, and thus changes the amount of air volume, thereby achieving control of the air volume so that the fan can always operate at the optimal efficiency point, thereby achieving simplified and energy-efficient air volume control. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a schematic diagram of the installation structure of the blades in the present invention;

[0016] Figure 2 The figure is a schematic diagram of the rotating structure of the movable blades in the present invention;

[0017] Figure 3 It is a schematic diagram showing the adjustment of the wheel drum in the present invention.

[0018] 1. Fixed blades; 2. Movable blades; 3. Wheel drum; 4. Controller; 5. Rotating shaft; 6. Tough material; 7. Limit block; 8. Retaining ring; 9. Elastic part. DETAILED DESCRIPTION

[0019] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0020] The present application discloses a blade, such as Figure 1 , 2 As shown, the blades in the present application are installed on the rotating shaft 5 of the fan, wherein: the blades include fixed blades 1 and movable blades 2, the fixed blades 1 and the movable blades 2 are arranged along the axial direction of the rotating shaft 5, the fixed blades 1 are fixedly connected to the rotating shaft 5, and the movable blades 2 are movably connected to the rotating shaft 5, and the movable blades 2 are installed on the rotating shaft 5 through an adjusting device, and the movable blades 2 can be adjusted by the adjusting device to rotate on the rotating shaft 5 to change the angle between the movable blades 2 and the fixed blades 1.

[0021] Furthermore, in the present application, the fixed blade 1 and the movable blade 2 are movably connected, and the methods of movable connection include but are not limited to rotational connection, connection through flexible or tough material 6, etc.; the connection method between the movable blade 2 and the adjusting device includes a movable connection and a fixed connection, but the connection position between the movable blade 2 and the adjusting device is set at a distance away from the connection end between the movable blade 2 and the fixed blade 1, so that the normal rotation of the movable blade 2 on the rotating shaft 5 can be realized to change the angle between the movable blade 2 and the fixed blade 1.

[0022] Preferably, in this embodiment, the movable blade 2 and the fixed blade 1 are connected together by a tough material 6 to meet the deformation caused by the relative movement between the movable blade 2 and the fixed blade 1; and the movable blade 2 is directly fixedly connected to the adjusting device, so that the structure is relatively simple and the overall stability is also better.

[0023] Furthermore, the regulating device in the present application includes a drum 3, which is mounted on a rotating shaft 5, and the movable blades 2 are fixedly connected to the outer side of the drum 3, and the drum 3 and the rotating shaft 5 are rotatably connected; the regulating device also includes an air volume sensor and a controller 4, and the controller 4 is connected to the air volume sensor signal. The air volume sensor can monitor the air volume generated by the fan in real time and transmit the signal to the controller 4. When the fan cannot meet the rated air volume requirement at this speed, the controller 4 can control the rotation of the drum 3 according to the air volume value, and then convert it into a rotation angle θ of the drum 3 according to the air volume value, drive the movable blades 22 to rotate, to increase the air volume, thereby improving the air supply efficiency. There is no need to control the air volume by controlling the motor speed, so that the motor always runs at the optimal efficiency point, and realizes simplified and energy-efficient air volume control.

[0024] Furthermore, in one embodiment, the adjusting device in the present application includes a driving device, such as a motor; the wheel drum 3 is installed on the rotating shaft 5 by a threaded connection, and the driving device is transmission-connected to the wheel drum 3, and changes the angle between the two blades by driving the wheel drum 3 to rotate on the rotating shaft 5.

[0025] Furthermore, if Figure 3 As shown, in another embodiment, the wheel drum 3 is sleeved on the rotating shaft 5, and a circle of teeth (360 teeth, each tooth is 1°) is provided on the end face of one end of the wheel drum 3, and a limit block 7 is also provided at the end of the wheel drum 3 provided with teeth, and teeth are also provided on the end of the limit block 7 opposite to the wheel drum 3. The limit block 7 is slidably sleeved on the rotating shaft 5, and a circle of protruding retaining rings 8 are provided on the rotating shaft 5. An elastic member 9 (such as a spring) is sleeved between the retaining ring 8 and the limit block 7. The wheel drum 3 is driven to rotate by a driving device. When it rotates to a certain angle, the driving is stopped. At this time, the limit block 7 keeps meshing with the wheel drum 3 under the action of elasticity to limit the position and prevent the wheel drum 3 from rotating further.

[0026] Preferably, the rotation angle of the movable blade 22 in the present application ranges from 0 to 45°. Within this range, the rotation of the movable blade 22 can be maximized within the constraints of the structure. Outside this range, the structure is difficult to meet the requirements.

[0027] The present application also proposes a fan, which includes the blades proposed in the present application.

[0028] The present application further proposes a method for adjusting a fan, wherein an air volume sensor is used to detect the size of the air volume value of the fan under the current output power, and the detected air volume value is compared with a preset air volume value, and the angle between the fixed blade 1 and the movable blade 2 is changed according to the difference until the air volume reaches the preset air volume. Compared with the traditional method of directly changing the output power to adjust the air volume, the air volume is adjusted by adjusting the blade angle, which is simpler, more efficient and more energy-efficient.

[0029] The above specific embodiments are only used to illustrate the concept of the present invention. A person skilled in the art may make various modifications and changes based on the concept of the present invention, and these modifications and changes are all included in the protection scope of the present invention.

Claims

1. A blade, the blade being mounted on a rotating shaft, characterized in that: The blades include: a fixed blade; a movable blade movably connected to the fixed blade in the axial direction of the rotating shaft; and an adjusting device connected to a side of the movable blade away from the fixed blade to drive the movable blade to rotate along the rotating shaft; The movable blades and the fixed blades are connected by a tough material; The adjusting device comprises a wheel barrel mounted on the rotating shaft, and the movable blade is rigidly connected to the outer side of the wheel barrel; The wheel drum is threadedly connected to the rotating shaft, and the adjusting device also includes a driving device for driving the wheel drum to rotate.

2. The blade according to claim 1, characterized in that The regulating device also includes: an air volume sensor and a controller connected to the air volume sensor. The controller is drivingly connected to the wheel drum to adjust the rotation angle of the movable blade according to the air volume.

3. The blade according to claim 1, characterized in that The rotation angle of the movable blade is 0 to 45 degrees.

4. A fan, characterized in that: The wind fan comprises the blade according to any one of claims 1 to 3.

5. A method for adjusting a fan, characterized in that: The fan is the fan as described in claim 4, and the adjustment method is: detecting the air volume of the fan at the current power, and preferentially adjusting the angle between the movable blade and the fixed blade according to the difference between the detected air volume value and the preset air volume value to increase the air volume.

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