JPH06105136B2 - Hot air type electric kotatsu - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a warm air electric kotatsu using a ring-shaped heater.

(B) Conventional technology In a conventional rectangular air-conditioning unit in which a warm air blowing unit is arranged, since this warm air blowing unit is provided on the back of the center of the ceiling, this warm air blowing unit is used. The distance from the unit to the short side is long and the distance to the long side is short, and as a result, the radiation efficiency of the radiant heat of the heater is uneven around the wobble and kotatsu.

(C) Problems to be Solved by the Invention The present invention provides a warm-air electric kotatsu that can radiate the radiant heat from the heater to the periphery of the ceiling evenly even if the ceiling of the yagura kotatsu is rectangular. The purpose is to

(D) Means for Solving the Problems The present invention has a configuration in which the mounting portions of the ring-shaped heater of the warm air sending unit provided on the rectangular ceiling portion are opposed to the long side portions of the ceiling portion. It is a thing.

(E) Action Since the mounting portion of the ring-shaped heater is opposed to the long side portion having a short distance from the heater, heat uniformly reaches the peripheral portion inside the kotatsu body.

(F) Example FIG. 2 and FIG. 3 show an overall view of the warm air type electric kotatsu,
(1) is the main body of the Yagura kotatsu, and the rectangular ceiling (2)
The legs (3) are supported at the four corners of each of the four corners, and a square unit mounting frame is formed at the center of the ceiling (2) by the cathe (2) ', and the warm air blowing unit (A ) Is attached.

Further, FIGS. 1, 4, and 5 show the details of the unit (A), in which (4) is a square unit top plate made of wood and having a heat insulating effect, and (5) is a top plate (4). ) Is a reflection plate attached to the lower surface of the above, and an inverted frustoconical portion (6) protruding downward is formed in the central portion by drawing, and a substantially annular inclined portion (downwardly inclined) on the outer peripheral portion ( 7) is formed, and the throttle edge (7) 'of the inclined portion (7) is concentric with the center of the inverted frustoconical portion (6).

Here, as shown in FIG. 3, the inclined portion (7) is not formed in a part of the outer peripheral portion of the reflection plate (5) facing the long side (rear side) of the ceiling portion (2), It is a flat part (8).

(9) is a motor fixed on its bottom plate arranged in the inverted frusto-conical section (6) by screws and nuts, and the rotary shaft (10) of the motor (9) penetrates through the center of the bottom plate. It is led down.

(11) is located directly below the inverted truncated cone (6) and has a rotating shaft (1
It is a blower fan consisting of an axial fan axially attached to (0) and has a structure as shown in FIG.
Eight shielding parts (12) are erected at equal intervals on the outer peripheral part of 1) by bending upward, and this is an inverted truncated cone part (6).
And a heater described later.

Reference numeral (13) is a ring-shaped heater that serves as a heating element, and the heater mounting portion (14) is opposed to the flat portion (8) of the reflection plate (5) and concentrically formed outside the inverted truncated cone portion (6). It is arranged.

The heater (13) is mounted by, for example, screwing a mounting piece (15) extending from the mounting portion (14) to a mounting seat (not shown) bulged on the reflection plate (5). The heater (13) is held horizontally by supporting appropriate places other than the mounting portion (14) of the heater (13) with a heat insulating support piece attached to the reflection plate (5).

(16) is a connector for supplying power to the motor (9) and the heater (13) mounted on the flat part (8), and (17) is 3
It is a ring-shaped cover that is attached by screwing the individual mounting feet (18) to the lower surface of the reflection plate (5) and is arranged concentrically with the heater (13) immediately below the heater (13). The through holes (19) are provided at equal intervals to improve the thermal influence on the guard (to be described later) by the radiant heat from the heater (13) and to make the air blown by the fan (11) uniform.

Reference numeral (20) is a protective guard that covers the fan (11), the heater (13), etc., and is attached by screwing the peripheral guard frame (21) to the top plate (4) together with the reflection plate (5). .

That is, as shown in FIG. 1, the peripheral end of the reflector (5) to which the motor (9), the fan (11), the heater (13), the cover (17) and the like are attached and the periphery of the guard frame (21). The end portion is overlapped and abutted on the lower surface of the peripheral portion of the top plate (4), and the tapping screw inserted from the upper surface of the top plate (4) is passed through the through hole of the peripheral portion of the reflection plate (5) to the guard frame (21). The reflection plate (5) and the guard (20) are attached to the top plate (4) by screwing, and the warm air blowing unit (A) is completed.

Further, the unit (A) having the above-described structure is fitted into the mounting frame of the ceiling portion (2) from above and suspended, and is incorporated in the kotatsu body (1). As shown in FIG. The mounting portion (14) and the connector (16) of (1) face the long side portion of the ceiling portion (2).

When the motor (9) and the heater (13) are energized, the rotation of the fan (11) causes the air flow to be as shown by the arrow in FIG. 1, and the air is drawn from below the central portion of the unit (A). The air passes through the fan (11) and is dispersed in the circumferential direction, and a part of the air flows in between the inverted truncated cone portion (6) and the shielding portion (12) of the fan (11) and is reflected by the reflection plate (5). ) Along with the lower surface of the cover), other air flows between the shield (12) and the cover (17) and is heated by the heater (13) respectively. The hot air is circulated and supplied into the kotatsu body (1) while being circulated.

Here, the diaphragm edge (7) 'of the inclined portion (7) of the reflector (5) is circular and concentric with the heater (13),
Moreover, since the cover (17) is also circular and concentric with it, the flow of warm air blown from the outside of the cover (17) becomes uniform over the entire circumference, and the heating effect is enhanced.

In addition, since the inclined portion (7) of the reflection plate (5) is concentric with the heater (13), the light of the heater (13) is directed toward the inclined portion (7).
Thus, the visual effect by the light of the heater (13) in the kotatsu body (1) is enhanced along with the uniformization of the air flow.

Therefore, in the drive state of the unit (A) as described above, the radiant heat of the heater (13) to the motor is
Since it is blocked by both the shielding part (12) of the rotating fan (11) and the peripheral wall of the inverted truncated cone part (6), the temperature rise of the motor (9) can be surely suppressed.

Further, as for the radiant heat to the lower side of the heater (13), the cover (17) is arranged concentrically below the heater (13), so that the radiant heat of the heater (13) abnormally heats the guard (20). This prevents the heat collector from touching the guard (20) and getting burned.

On the other hand, if the lower part of the heater (13) is completely covered with the cover (17), the temperature distribution directly below the unit (A) may be deteriorated. Since the through hole (19) is provided through and the radiant heat of the heater (13) is radiated downward through this through hole (19), the temperature distribution is improved while preventing the thermal effect of the radiant heat on the guard (20). Will be done.

By the way, usually, in the kotatsu body (1) having the rectangular ceiling portion (2), the distance from the unit (A) to the long side portion and the short side portion are different from each other. There is a disadvantage that a temperature difference occurs between the short side and the short side.

However, in the above-described embodiment, the ring-shaped heater (13) is used, and the mounting portion (14) of the heater (13) with less radiant heat is opposed to the long side portion having a short distance from the heater (13). As a whole, the heat from the heater (13) uniformly reaches the peripheral portion inside the kotatsu body (1), and the above-mentioned temperature difference is very small.

It should be noted that, in the above-mentioned embodiment, the case where the shielding part (12) integrated with the fan (11) is partially formed upright is shown, but this may be formed in a cylindrical shape over the entire circumference. In addition, the shielding effect against the radiant heat of the heater (13) is further enhanced.

(G) Effect of the Invention As described above, according to the present invention, the attachment portion of the ring-shaped heater is made to face the long side portion of the rectangular ceiling portion.
The heat from the heater uniformly reaches the entire inner circumference of the YAGURA-KOTatsu main body, and efficient hot air heating can be performed.

[Brief description of drawings]

The drawing shows one embodiment of the warm air blowing unit of the present invention,
FIG. 1 is a cutaway front view of a main part, and FIGS. 2 and 3 show a yagura kotatsu in which a warm air blowing unit is incorporated.
The figure is a partially cutaway front view, FIG. 3 is a partially cutaway bottom view, FIGS. 4 and 5 are bottom views of essential parts and a perspective view in a state of being turned upside down, and FIG. 6 is a perspective view of a blower fan. is there. (1) …… Yagara kotatsu body, (4) …… Unit top plate, (5) …… Reflector plate, (9) …… Motor, (11) ……
Blower fan, (13) …… heater, (A) …… warm air blower unit.

Claims (1)

[Claims] 1. A warm air blower unit disposed on a rectangular ceiling portion of a yagura kotatsu, wherein the warm air blower unit is provided on a lower surface of a unit top plate and protrudes downward in a central portion of an inverted cone. A reflector having a trapezoidal portion, a motor having a rotary shaft disposed in the inverted frustoconical portion and a bottom plate of the inverted frustoconical portion penetrating, and a shaft mounted on the rotary shaft directly below the inverted frustoconical portion. Hot-air type, characterized in that it is constituted by a blower fan and a ring-shaped heater provided on the outside of the inverted truncated cone shape, and the heater mounting portion is opposed to the long side portion of the ceiling portion. Electric kotatsu.