JP2537580Y2 - Hot air heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION Field of the Invention The present invention relates to a hot air heater provided with a blower that performs multi-stage control of air flow.

2. Description of the Related Art A conventional hot air heater of this type has a blower mounting base 16 mounted on a back plate 10a of a heater main body 10, as shown in FIG. As can be seen from the drawing, the blower mounting base 16 is provided with various ribs and the like in order to have a certain degree of strength, and is formed into a complex cross-sectional shape as a whole. (For example, Japanese Utility Model Application Laid-Open No. 64-31952 and Japanese Utility Model Application Laid-Open No. 62-69763) Problems to be Solved by the Invention In recent years, this type of heater has a multistage combustion amount (for example, a maximum combustion amount of 3200 kcal / 1000kcal from h
/ h), it is common practice to control the air volume supplied by the blower to an air volume balanced with the combustion volume in order to obtain a comfortable hot air temperature. As a method of multi-stage control of the air volume, a control method or the like is used in which a power supply applied to the motor by an electronic circuit is applied in several waves and one wave is not applied, that is, a part of the waveform is removed. In the field of petroleum fan heaters, a mechanism has been implemented to apply a half-wave power to the blower motor during fire extinguishing, apply a brake, instantaneously stop blowing, and completely burn unburned gas in the body. I have. For this reason, when the above control is applied to the motor of the blower, the propeller fan 1 of the blower is energized as shown in FIG. 5, and when the rotation starts, a thrust acts, and the motor shaft 3 is drawn to the motor 2 side. It keeps rotating by being pushed to the 4 side. On the other hand, when the power supply applied to the motor 2 instantaneously loses its waveform or a half-wave is applied, the thrust of the propeller fan 1 becomes zero,
The rotor 5 and the motor shaft 3 move integrally to the magnetic center side, and the end face of the metal 6 on the propeller fan 1 side and the end face of the rotor 5 collide.
The rotor 5 and the motor shaft 3 move to the side, and the collision mode is repeated on the pivot 4 side again, which is a factor of increasing the vibration of the motor 2. When the vibration inside the motor 2 becomes large, the conventional blower mounting frame 16 has a drawback that the vibration is transmitted to the main body as it is, generating abnormal noise and chattering.

Means for Solving the Problems The present invention has been made to solve the above drawbacks,
The shape of the blower mounting frame is designed so that the blower mounting part has strength by pressing down, the connecting part with the hot air heater main body is folded back to measure the strength, and the connecting part between the blower mounting part and the main body is made of multiple radial flat plates. It is connected by.

The strong thrust vibration generated by the motor of the blower in the thrust direction is attenuated by the flat plate portion and does not transmit strong vibration to the main body, so that the main body does not generate abnormal noise or chatter.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1, 2, and 3. FIG.

In the drawing, reference numeral 10a denotes a back plate of the main body 10, which has a hole 10b through which air flows on the right side in the drawing, and a motor 8 and a propeller fan 9 of the blower are connected to a peripheral portion of the hole 10b by a blower mounting base 7. I have. 11 is a front cover forming the front surface of the main body 10, 12 is a combustion section arranged inside the main body 10, 13 is a table, 14
Is a back cover that covers the back surface of the back plate 10a, and a filter 15 is attached to a portion facing the propeller fan 9. The blower mounting base 7 has strength by step pressing at a mounting portion 7a with the motor 8, measures strength by folding back at a connecting portion 7b with the back plate 10a, and the mounting portion 7a and the connecting portion 7b They are connected by a plurality of radial flat plates 7c.

According to the above configuration, the blower mounting base 7 is a back cover.
Because it is covered with 14, even if an object collides or the main body 10 falls down, there is little factor that an external force is applied, but since the mounting portion 7a and the connection portion 7b have the same strength as a conventional blower mounting base. Even if the above trouble occurs, there is no fear that an abnormal external force is applied to the propeller fan 9 or the motor 8. Also, when the waveform removal control or the half-wave control is applied by the electronic circuit as described above, the vibration in the thrust direction generated by the motor 8 can be attenuated and absorbed by the plurality of radial flat plates 7c. No chatter or chatter.

Effect of the Invention As described above, according to the present invention, in the mounting base of the blower, the connecting portion between the mounting portion of the blower and the main body is connected by a plurality of radial flat plates, so that the blower is controlled in multiple stages by electric control. Also, it is possible to provide a device that is free from abnormal noise and has less body vibration, and can provide a product with reduced noise.

[Brief description of the drawings]

FIG. 1 is an exploded rear perspective view of the present invention, FIG. 2 is an exploded perspective view of the same main part, FIG. 3 is a vertical sectional view of the same, FIG. 4 is a conventional rear perspective view, and FIG. It shows a partial cross-sectional view. 7 Blower mounting base, 7a Mounting part, 7b Connection part
7c …… a flat plate.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shoji Aramaki 3-1, Shinjuyoji, Kashiwa-shi, Chiba Examiner, Kenichi Awazu, Hitachi Home Tech Co., Ltd. Opened Showa 61-41554 (JP, U) Opened Showa 62-198850 (JP, U) Opened Showa 50-93959 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] An air blower for performing multi-stage control of air flow is provided in a main body (1).
In the hot air heater mounted on the back plate (10a) of (0) by the blower mounting base (7), the mounting portion (7a) of the motor (8) of the blower mounting base (7) is stepped to increase the strength. The connecting part (7b) with the main body (10) is folded back to measure the strength, and the mounting part (7a) of the motor (8) and the connecting part (7b) of the main body (10) are connected to a plurality of radial flat plates (7). A hot-air heater characterized by being connected in 7c).