JPS62237097A - Turbo fan provided with encoder mechanism - Google Patents

Abstract

PURPOSE:To simplify composition and enable production cost reduction and mass production by utilizing a motor rotary shaft as a rotary encoder shaft, upper and lower plates as rotary discs and incorporating encoder mechanism in a body with fans. CONSTITUTION:Magnets 5 are mounted on the outside edge of a subplate 2 and magnetism sensors 6 are provided in the vicinity of and for the magnets 5. And ray passage holes 7 and 7 of proper size are provided in alignment on the outside edge of upper and lower plates 1 and 2. A light emitting element 8 is set in a ray hole 7, and a light receiving element 10 is set in another ray hole 7 through a fixed disk 9. The rotary shaft 11 of a motor M is utilized as a rotary encoder shaft, and upper and lower plate 1 and 2 are as rotary discs. The practical manufacture of encoder fans with an encoder mechanism incorporated in the composition of motor direct-coupled fans enables simple composition, production cost reduction, and mass production.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the development of a turbo fan equipped with an encoder mechanism for detecting or controlling the rotation speed of the fan. An encoder turbo fan that does not require an encoder and incorporates an encoder mechanism into the fan when configuring the fan to rationally manufacture an encoder fan, simplifying the conventional complicated system, and reducing production costs and mass production. This is what we were trying to achieve.

That is, to explain with reference to the drawing which is one embodiment, a plurality of blades (3) are attached between the upper and lower disc-shaped main plates (1) and the sub-plate (2) having an opening in the center, and the main plate is In a turbo fan with a boss (4) fixed to the center, a magnet (5) is attached to the outside of the sub-plate (2) at 1111M, and a magnetic sensor (6) is attached to the magnet.
) are installed nearby, and in Fig. 3, the upper and lower plates (1),
On the same outer edge of (2), a suitably sized light passing hole (7) is provided at the same position on the straight line, and a light emitting element (8) is placed on one side of the light passing hole, and a fixed disk (2) is placed on the other side. 9), set the light receiving element (lO) and rotate the motor M @(Il
1 is a rotary encoder shaft, and the upper and lower fan plates are configured as rotating disks.

As described above, the present invention incorporates an encoder mechanism in a motor-directly connected fan configuration, unlike the conventional configuration in which a separately manufactured encoder device is coupled to a motor-equipped fan. As a result, the assembly process is extremely simple and the manufacturing efficiency is extremely high, without any difference from the conventional assembly process. However, during production,
First, in the case of a magnetic encoder, two magnets (5) are attached to the circumferential edge of the sub-plate (2) (or the bottom surface of the lower main plate) as shown in Figure 1. Magnets may be arranged as N and S, and a magnetic sensor (6) is placed close to these magnets, so that the rotation speed of the fan can be detected by this sensor as shown in the block diagram of Fig. 5. , and is also controlled by a feedback signal. In addition, in the optical encoder as shown in FIG. 4, light passing holes (7) are provided on the peripheral edges of the upper and lower main and sub-plates, and light emitting elements (8) are provided on one side above and below the passing holes.
On the other side, a so-called optical encoder equipped with a light receiving element 00) passes the required light beam through a hole (7) via a fixed disk.
The rotation speed of the fan is detected by receiving light through the
This is rotated and controlled using a feedback signal, as shown in the block diagram of FIG.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; Fig. 1 is a plan view of a turbo fan, Fig. 2 is a front view of the same as above, showing the magnetic encoder mechanism, and Fig. 3 is a plan view of half of the turbo fan. FIG. 4 is a sectional view of the same as above, and a schematic diagram of the optical encoder mechanism, and FIG. 5 is a block diagram. In addition, in the drawing (1), (2)...upper and lower plates of turbo fan configuration (3)...blade (4)...boss (5)... ... Magnet (6) ... Magnetic sensor (force ... Light passing hole (8) ... Light emitting element (9) ... Fixed disk (10 )······Light receiving element

Claims (1)

[Claims] A two-pole or multi-pole magnet is attached to the peripheral edge of the upper and lower main plates or sub-plates constituting the turbo fan, a magnetic sensor is provided close to the magnet, and the rotation speed of the fan is detected by the magnetic sensor, or In addition, a light beam passage hole of an appropriate size is provided at least in one place on the edge of the main plate and the sub plate on a straight line between the upper and lower plates, and a light emitting element is attached to one side of the passage hole, and a light receiving element is attached to the other side via a fixed disk. The encoder mechanism is directly incorporated into the fan so that the rotary shaft of the motor is set as a rotary encoder shaft, and the plate is a rotating disc to detect the fan's rotation speed, and this is controlled by a feedback signal. A turbo fan equipped with magnetic and optical encoder mechanisms.