JPS6227279B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an electric fan, an intake type window ventilation fan used by being attached to a window, or a blower device such as an air conditioner. This invention relates to a blower device equipped with a rotating grill that automatically changes the direction of the air flowing through the air.

[Background of the invention]

In the above-mentioned blower device, in order to automatically deflect the wind flow and send a pleasant breeze close to natural wind to the user, for example, in the case of what is generally called an electric fan, an electric motor is used, and the electric fan is rotated by the electric motor. The entire impeller is oscillated using a complicated link mechanism to blow air into a certain range. However, the above-mentioned swing mechanism is not very preferable because it can only provide a horizontal air blowing range, has a very complicated structure, is difficult to manufacture, and is prone to failure. Therefore, it is desired to provide an air blowing device that can automatically blow air in the vertical direction and is equipped with a wind direction deflection device having a simple configuration.

As a means to solve this problem,
It is conceivable to use a rotating grill having a large number of inclined gratings having a certain angle to the wind flow to control the wind generated by an impeller, as in Japanese Patent No. 15641. However, although the device described in this publication can solve the above problems, it has the disadvantage that the air blowing range cannot be changed arbitrarily and easily.

[Purpose of the invention]

The present invention has been made for the purpose of providing a blowing device having a rotating grill as described in the above-mentioned publication, in which the blowing range can be arbitrarily and easily changed.

[Summary of the invention]

The gist of the present invention is to provide a body frame, a main motor attached to the body frame, an impeller rotated by the main motor, and an impeller installed in front of the impeller and driven by the rotation of the impeller. In the blower device, the blower is equipped with a rotating grill that deflects the air generated when the rotating grill is turned, and a drive motor that rotates the rotating grill, and the drive motor is a small single-phase winding synchronous motor whose starting direction is not regulated. In addition to providing an engaging protrusion, the main body frame includes:
A stopper member 16 that is artificially attached and detached is provided within the rotation locus of the engagement protrusion 15, and the rotation angle of the engagement protrusion that is the range until the engagement protrusion 15 collides with the stopper member 16 is changed. Accordingly, the inversion angle of the rotating grille is adjusted.

[Embodiments of the invention]

An embodiment of the present invention will be described below based on the drawings. Figure 1 is a vertical cross-sectional view of the entire blower. In the figure, 1 is a main motor that rotates an axial flow impeller 2. This main motor 1 is an external rotor type in which a rotor rotates around a stator. It's a motor. Reference numeral 3 denotes a main body frame that supports the main motor 1, and has a large number of radial support ribs 4 integrally molded from synthetic resin. The support ribs 4 act to rectify the swirling air caused by the outer impeller 2 that supports the main motor 1 and increase the wind speed. An inner ring 5 is also integrally formed at the inner end of this support rib 4, and a support leg 6 of the main motor 1 is fixed to this inner ring 5 with a screw 7. 8
is a fan guide formed integrally with the main body frame 3,
It is formed into a cylindrical shape so as to surround the impeller 2. Reference numeral 9 denotes a suction portion formed by cutting out a side portion of the main body frame 3. Reference numeral 10 denotes a drive motor fixedly held in a space formed between the front surface of the main motor 1 and the cover 11, and is actually composed of a small synchronous motor as shown in FIG. This drive motor 1
A rotary grill 13 having a large number of inclined frames 12 is fixed to the output shaft 10-1 of No. 0. The rotating grille 13 has a circular shape as a whole when viewed from the front, and the oblique frames 12 are arranged in parallel with each other at certain intervals. Further, the inclination angles of the respective inclined gratings 12 are slightly different from each other in order to expand the air blowing range. Further, the maximum angle of inclination of the inclined grid 12 is 30 degrees with respect to the wind flow. Therefore, when the rotary grill 13 is in the state shown in FIG. 1, the wind generated by the impeller 2 is directed downward as a whole as shown by the arrow. 15 is a rotating grill 13
Engagement protrusions 16, 16a integrally protruding from the outer periphery of the fan guide 8 are inserted into holes 17 formed in a plurality of holes 17 on the front surface of the outer periphery of the fan guide 8, and are removably inserted into the stopper members at positions where they can engage with the engagement protrusions 15. It is in. The engaging protrusion 15 and the stopper members 16, 16a constitute a stopper device. 18 is a switch that controls the operation of the main motor 1 and is operated by a pull cord. FIG. 2 is a schematic diagram of a drive motor 10 that operates in the same manner as the synchronous motor described in Japanese Patent Publication No. 44-28613. To briefly explain this configuration, 20 is a coil wound in a single phase around a bobbin 21, and commercial power is applied from the outside. 22 is coil 2
It is a protective tape wrapped around the outer circumference of 0. A magnetic pole plate 23 is fixed to one end surface of the coil 20, and is formed by cutting and raising a plurality of magnetic poles 24. Reference numeral 25 denotes a magnetic pole plate fixed to the other end surface of the coil 20, which is also formed by cutting and raising a plurality of magnetic poles 26. A rotor 27 is disposed within the group of magnetic poles 24 and 26 and is formed into a cylindrical shape from a ferrite sintered alloy, and has N and S magnets alternately magnetized on its outer peripheral surface. 28 is the rotor 27
It is a pinion formed in A gear box 29 houses a plurality of gear groups 30, the first gear of which meshes with the pinion 28, and the output shaft 10-1 described above is fixed to the final gear. The drive motor 10 that rotates the rotary grill 12 is constructed in this manner, but this drive motor 10 differs from that described in the latter publication in that it does not have a reverse rotation prevention mechanism. That is, in this type of synchronous motor, when alternating current is applied to the coil 20, N and S poles appear alternately in the magnetic poles 24 and 26, and therefore a rotational force acts on the rotor 27, but the starting direction is not fixed at that time. do not have. This is because the starting direction is determined by the relative positional relationship between the rotor 27 and the magnetic poles 24 and 26 before starting, but the resting position of the rotor 27 is not necessarily constant.
However, if a reverse rotation prevention mechanism is used to prevent reverse rotation and allow only one rotation,
If the reverse rotation is prevented by the reverse rotation prevention mechanism even if the rotation is started in the reverse direction, the rotation will change to the normal rotation from that position. If the forward rotation is prevented again, the rotation starts from that position again.

If the drive motor 10 having such characteristics is used to rotate the rotating grill 13 and the rotation of the rotating grill 13 is prevented within a certain range, the rotating grill 13 can repeatedly rotate forward and reverse within that range. .

If the above structure is attached to a wall and power is applied to the main motor 1, the impeller 2 will be rotated, thereby making it possible to send wind forward. At this time, if the rotating grill 13 is rotated by the drive motor 10, it will rotate approximately 60 degrees as shown in Fig. 3.
It can send wind over a range of degrees. This is clear from the fact that the air blowing range B due to a certain specific position of the rotating grill 13 revolves around the center line O. Also, it is the inclined grid 12 that can send wind within a 60 degree range.
This is clear from the fact that the maximum inclination angle is 30 degrees. In this way, this air blower can easily send air over a wide area, but when the user is lying on the floor or sitting, as shown in the figure, the air is sent upwards in the room. It's meaningless,
There is a request to blow air downward as much as possible like in B. At this time, it is sufficient to stop the drive motor 10 and keep the rotary grill 13 in the state shown in FIG. 1. Furthermore, when it is desired to automatically blow air mainly into a downward range in the same manner as the swinging of an electric fan, two stopper members 16, which restrict the rotation range of the rotary grill 13, are used as shown in FIGS. 4 and 5. 16a may be inserted into any hole 17. When the drive motor 10 is energized, the rotary grill 13 begins to rotate clockwise due to the activation direction of the drive motor 10.
When the engaging protrusion 15 of the rotating grille 13 hits the stopper member 16, the rotation of the drive motor 10 is reversed due to the nature of the drive motor 10.
3 starts rotating counterclockwise. And again,
When the engagement protrusion 15 hits the stopper member 16a, the rotation of the drive motor 10 is reversed again, and the rotating grille 1
3 will rotate clockwise. In this way, the rotating grill 13 has two stopper members 16,
The reversal angle C is regulated by the position of 16a, and thereby the range of oscillating air blowing can be arbitrarily selected. In addition, in Figures 4 and 5, 31
is a pocket for storing the stopper members 16, 16a, and is formed integrally with the main body frame 3. 32 is a display section provided on the engagement protrusion 15.

Although the present invention is constructed and operates as described above, the drive motor 10 may be of a type that senses the increased current and reverses polarity when rotation is stopped by a stopper device.

〔Effect of the invention〕

As explained above, according to the present invention, there is provided a main body frame, a main motor attached to the main body frame, an impeller rotated by the main motor, a main motor installed in front of the impeller, and a main motor mounted on the main motor. A blower device comprising a rotating grill that deflects wind generated by the rotation of a car, and a drive motor that rotates the rotating grill, the drive motor being a single-phase winding small synchronous motor whose starting direction is not regulated. , an engaging protrusion 15 is provided on the rotating grille, and a stopper member 16 is provided on the main body frame 3 to be artificially attached and detached within the rotation locus of the engaging protrusion 15.
is provided, and the engagement protrusion 1 is provided on this stopper member 16.
By changing the rotation angle of the engaging protrusion, which is the range up to the collision of the rotating grilles, the reversal angle of the rotating grille can be adjusted. The structure is much simpler compared to those that change the direction of air flow by changing the attitude of the main motor, and
The air blowing range, including the vertical component, allows you to easily select the desired reversal angle of the rotating grill.
This provides a truly convenient air blower for the user.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal cross-sectional view of the whole, Fig. 2 is a longitudinal cross-sectional view of the drive motor, Fig. 3 is an explanatory diagram of the air blowing range, and Fig. 4 is a diagram showing the use of a stopper device. The front view and FIG. 5 are also perspective views. 10... Drive motor, 13... Rotating grill, 1
5... Engaging protrusion, 16, 16a... Stopper member, 17... Hole.

Claims (1)

[Claims] 1. A main body frame, a main motor attached to the main body frame, an impeller rotated by the main motor, and an impeller installed in front of the impeller and rotated by the impeller. A blower device comprising a rotating grill that deflects the generated wind and a drive motor that rotates the rotating grill, the drive motor being a single-phase winding small synchronous motor whose starting direction is not regulated. An engaging protrusion 15 is provided on the body frame 3, and a stopper member 16 is provided on the main body frame 3 to be artificially attached and detached within the rotation locus of the engaging protrusion 15, and the engaging protrusion 15 collides with this stopper member 16. A blower device characterized in that the reversal angle of the rotating grille 13 is adjusted by changing the rotation angle of the engaging protrusion. 2. In the device according to claim 1, a plurality of holes 17 are provided close to the outer periphery of the rotating grille 13 of the main body frame 3, and two selected holes 17 are provided.
A blower device characterized in that a stopper member 16 is detachably attached to the air blower.