JPS5934834Y2 - warm air kotatsu - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an outlet of a hot air generating section in a hot air kotatsu that generates and heats hot air.

The details of this invention will be explained below according to the illustrated embodiments.

That is, in FIG. 1, 1 is a tower, and 12 is a hot air generator installed under the top of the tower.

Next, details of the hot air generator 12 will be explained with reference to FIG.

In this figure, 2 is an outer casing, 3 is an L-shaped motor mounting plate provided in the outer casing 2, 4 is a drive motor fixed to this motor mounting plate, and 5 is a A suction port 6 provided on the motor mounting plate is an airflow generating fan provided at a position opposite to the motor 4 across the motor mounting plate, and is rotated by the motor 4.

Reference numeral 7 denotes a casing of the fan 6, and the casing 1 and the motor mounting plate 3 form an air flow path duct.

Reference numeral 8 denotes a long air outlet located at the tip of this duct and provided in the outside □ 2, and 9 is a positive temperature coefficient thermistor as a heating element provided in the duct, which may be circular, rectangular, or A duct that has a large number of ventilation holes such as a polygon, or a duct that is composed of a large number of flat plate, disk, etc. shapes arranged parallel to the air flow, and one or more of these heating elements are connected to the duct. It is located inside.

Since the heating element is composed of a positive temperature coefficient thermistor, if the temperature of the air passing through the heating element is low, the amount of heat generated will increase in inverse proportion to it, and if the air temperature rises, the amount of heating will also decrease.

10 is a suction port provided on the side wall of the outer casing 2, and 11 is a flat outlet grill provided at the outlet, which is symmetrical with respect to its center and has a cross-section shaped like a square, widening in the wind direction. A plurality of blowout slits are provided, each of which is formed by bending the top plate, and a plurality of blowout slits are provided in each area, which is surrounded by four sides parallel to each outer edge of the top plate and divided into four by two diagonal lines. The above-mentioned blow-out slits are provided parallel to each outer edge.

FIG. 3 is an enlarged front view of the air outlet grille.

When such a hot air generator is operated, the fuzu suction port 1
Air is sucked in from 0 and blown into the air flow path by a fan 6 through a suction port 5 provided on the motor mounting plate 3, heated by a positive temperature coefficient thermistor, and blown out from an air outlet 8 as warm air. .

At this time, the air outlet 8 is provided with an air outlet grille 11 which is shaped like a wide bow in the flow direction of the hot air, is symmetrical about the center, and has a slit parallel to the outer edge of the top plate. The warm air is blown out uniformly around the kotatsu and is blown approximately evenly in all directions inside the kotatsu.

Moreover, since the blow-off grill 11 is a plate-shaped thing provided at the blow-off port 8, even if a person puts his or her feet inside the tower 1, it will not be an obstruction at all.

Note that the heating element uses a positive temperature coefficient thermistor, so
At the start, the temperature inside the kotatsu is low and the temperature of the air flow passing through the positive temperature coefficient thermistor 9 is low, so the amount of heat generated is at its maximum and the temperature inside the kotatsu rises quickly.

As the temperature inside the kotatsu gradually rises, the amount of heat generated by the PTC thermistor 9 decreases, and the temperature inside the kotatsu remains constant due to the characteristics of the PTC thermistor element itself.

In the above embodiment, a positive temperature coefficient thermistor was used as the heating element, but it is not limited to a positive temperature coefficient thermistor, and it goes without saying that a nichrome wire heater or a sheathed heater may also be used. It goes without saying that the air outlet 8 is not limited to a rectangular shape as long as the air outlet slit is parallel to the outer edge of the top plate.

As mentioned above, this invention provides the outlet of the hot air generating section with an outlet grille that is parallel to the outer edge of the top of the tower and has a plurality of slits that are wide in the direction of the wind. Because of this, warm air is evenly blown out inside the kotatsu.

Therefore, the air is sent directly to the four sides of the kotatsu, and even when a person warms their hands and feet from the four sides, the air outlet grill does not get in the way, and the air is evenly distributed no matter where the hands or feet are placed inside the kotatsu. To provide a kotatsu that allows you to feel warm by directly touching hot air, and that does not change the temperature distribution inside the kotatsu.

[Brief explanation of drawings]

The figures all show an example of this invention. Figure 1 is a vertical cross-sectional view of the entire electric kotatsu, Figure 2 is an enlarged vertical cross-sectional view of the hot air generating part, and Figure 3 is an enlarged view of the suction grill. It is a front view. In the diagram, 1 is the tower, 2 is the outside square, 4 is the motor, 6 is the fan, 7 is the casing, 8 is the air outlet, 9 is the heating element, 1
0 is a suction port, 11 is a blowout grill, and 12 is a hot air generator. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A hot air generator that has an air flow generating fan and a heating element in the air flow passage, and a plate-shaped blowout grill at the air outlet is attached to the underside of the top plate of the tower. A plurality of blowout slits are provided, each of which is bent in the shape of a wide end in the direction of the arrow, and is surrounded by four sides parallel to each outer edge of the top plate, and is divided into four areas by two diagonal lines. , a warm air kotatsu in which a plurality of the above-mentioned blowing slits are provided in parallel to each outer side.