JPS6131696A - Fan - Google Patents

Abstract

PURPOSE:To improve the fan efficiency and to make compact the structure by arranging fans A, B formed with vanes in the opposite directions on same axis then rotating said fans in the opposite directions to each other. CONSTITUTION:Fan A and motor inner 8 are fixed to the motor shaft 17 while motor outer 9 is arranged around the motor inner 8. Then a fan B formed with vane in the opposite direction from fan A is arranged at the outside of motor outer 9. Upon application of voltage, motor inner 8 and motor outer 9 will rotate relatively thus to rotate the fan A and B in the opposite direction to each other. Fan A and B are fluid coupled through air flow and rotated stably with such absolute rotary speed as the fluid load and mechanical load are balanced thus to improve the fan efficiency. When arranging fan A in front of motor shaft 17 while fan B in the rear, most compact dryer can be constituted.

Description

[Detailed description of the invention] (Technical field) The present invention relates to a blower.

(Prior Art) Many conventional blowers have been of the type that blows air by rotating blades using a motor.

However, this type of moke was not free from the drawback of low air blowing efficiency.

(Object of the Invention) The present invention was proposed in order to improve the above-mentioned drawbacks, and an object of the present invention is to provide a blower with completely improved blowing efficiency.

(Disclosure of invention) Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention.
2 indicates a main body, 2 a switch provided on the main body, and 3 a cord. 4 is an air inlet, 5 is an air outlet, and 6 is a heater.

Reference numeral 17 denotes a motor shaft, which is rotatably supported by bearings 7 provided at the inlet port 4 and outlet port 5. Eleven fans A and a motor inner 8 are fixed to the motor shaft. Further, a motor outer 9 is provided around the motor inner, and this motor outer is rotatably supported by a motor shaft 17 via bearings at both end surfaces thereof.

The motor inner 8 is composed of a core 8a, a coil 8b, and a coil 9, and the coil 8b is connected to a commutator 16 fixed to a motor shaft 17.

The motor outer 9 has a yoke, a permanent magnet 9a provided inside the yoke, and a terminal plate 10 provided on one end surface. This terminal board is provided with 14 brushes B on the inside and a sliding ring 15 on the opposite side. This brush 14
and the sliding ring 15 are electrically connected, and the sliding ring 15 is in contact with the brush A of 13.
is fixed to the main body and connected to an external power source. Further, a fan B is provided outside the motor actor.

Next, the operation will be explained.

When an input voltage is applied here, the motor inner 8 and the motor outer 9 start relative rotation, and thereby the fan A and the fan B start rotating. Therefore, fan A and fan B are fluidly coupled by the blast air VC, and rotate stably at an absolute rotation speed (rotation speed when viewed from a non-stop position) where the fluid load and mechanical load of each fan match approximately 9. In this case, if the fan A is provided in the front part of the motor in the axial direction and the fan B is provided in the rear part, the most compact dryer can be constructed.

Figure 2 shows a front view of fan A seen in the direction of the arrow along X-X in Figures 1 and 4, and CB) shows a front view of fan A seen in the direction of the arrow along Y-Y in Figures 1 and 4. A front view of fan B as seen in FIG.

The direction of rotation is indicated by an arrow. Note that the fans A and B have blades formed in opposite directions.

Furthermore, FIG. 3 shows a cross-sectional view of fans A and B.
In the figure, 17 indicates a motor shaft (rotating shaft).

Note that the arrows indicate the flow of wind.

FIG. 4 shows another embodiment of the present invention, in which 1 is the main body, 2 is a switch, 3 is a cord, 4 is an inlet, and 5
is a discharge port, 6 is a heater, and 8 is a motor, each of which is attached to the suction port 4. Reference numeral 17 denotes a motor shaft, to which a bevel A of the workpiece 8 is fixed, and to this bevel A, 12 fans B are fixed. Reference numeral 19 denotes a bevel support stand, which is attached to the center of the main body through an arm 21, and this bevel support stand 1
Two bevels B are rotatably attached to 9 and mesh with bevel A at an angle of 90°. Furthermore, this bevel BI
C is constructed such that 23 bevels C mesh with bevels B at an angle of 90°, and this bevel C is rotatably placed on the shaft 17 of the motor. It is being

When the motor 8 is rotated based on this request, the fan A rotates in the same direction as the motor, the fan B rotates in the opposite direction to the fan A, and air from the suction port 4 is discharged from the discharge port 5. Note that the fans A and B have blades formed in opposite directions.

(Effects of the Invention) As described above, the present invention provides fan A and fan B coaxially, the blades of these fans are formed in opposite directions, and each fan exerts an opposing force to the other. By rotating the fan in the opposite direction, the blowing efficiency can be increased and the blower can be manufactured more compactly than a blower with the same amount of air blowing.

[Brief explanation of the drawing]

FIG. 1 shows one embodiment of the blower of the present invention, FIGS. 2 and 3 show a fan configuration used in the blower of the present invention, and FIG. 4 shows another embodiment of the blower of the present invention. l...Body, 2...Switch, 3...
・・・Code, 4...Inlet, ′”′5...
...Discharge port, 6...Heater, 7...
Bearing, 8...Motor inner, 9...
Motor outer, 10...Terminal board, 11...
...Fan A112...Fan B, 13...
...Brush A314...Brush B515...
...Sliding ring, 16... Commutator, 17...
...Motor shaft

Claims (5)

[Claims] (1) A fan A rotated by a motor and a fan B rotated in the opposite direction to the fan A are provided, and the blades of both fans are formed in opposite directions. A blower. (2) A motor consisting of a motor inner and a motor outer is arranged in the air passage formed in the main body, and the shaft of the motor inner is rotatably supported with respect to the main body, and the motor outer is rotatably supported. Claim 1, characterized in that the motor is provided so that its positional relationship can be changed relative to the motor inner, a fan A is provided on the motor inner, and a fan B is mounted on the motor outer. blower. (3) A terminal plate is provided on one end surface of the motor outer, the terminal plate is rotatably supported on the shaft of the motor, and a sliding ring and a brush B are further provided on the terminal plate, and the brush B is connected to the motor. The sliding ring contacts the commutator connected to the coil that constitutes the inner, and the sliding ring is electrically connected to brush B, and also contacts brush A, which is fixed to the main body and connected to an external power source. An air blower according to claim 2, which is configured to do so. (4) The blower according to claim 2, wherein the fan A is fixed to the shaft of the motor, and the fan B is fixed to the terminal plate of the motor outer. (5) a fan A that rotates in the same direction as the motor;
2. The blower according to claim 1, further comprising a fan B that rotates in the opposite direction to the fan A via a bevel that is connected to the fan A.