JPS5832299B2 - Warm air kotatsu - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot air kotatsu in which a hot air generating unit is installed inside the tower kotatsu to forcefully circulate hot air, and in particular, the present invention relates to a hot air kotatsu in which a hot air generating unit is installed inside the tower kotatsu to forcefully circulate hot air. The purpose of this is to achieve a rapid heating effect during heating and to obtain a comfortable heating effect after the set temperature rises.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a tower kotatsu main body, which is composed of a top plate 2 and legs 3 that can be attached and suspended from the corners of the top plate.

4 is a heat source for heating the inside of the tower kotatsu body 1;
It is composed of a hot air generation unit 5 installed within the main body and an infrared lamp 6 positioned below the unit,
The hot air generating unit 5 is provided with a blower 8 driven by an electric motor M in the ventilation duct 7, and a positive temperature characteristic resistance element 9 which generates self-heating and is disposed at an outlet 11 of the blower corresponding to the blower. An air inlet 10 is formed at one end on the blower 8 side, and the positive temperature characteristic resistance element 9 having ventilation holes H, H, etc. is attached to the air outlet 11 formed at the other end. .

Reference numeral 16 denotes a wind relief hole bored in the ventilation duct 7.

The positive temperature characteristic resistance element 9, which generates self-heating, exchanges heat with the air from the blower 8 associated with the element to warm the air, and discharges the warm air from the outlet 11. Moreover, the element has a characteristic that the amount of heat generated from itself can be changed by changing the amount of air blown.

That is, the amount of heat generated has a characteristic that it is proportional to the amount of air, and for example, by increasing the amount of air that exchanges heat with the element, the amount of hot air coming out of the outlet 11 can be increased.

Reference numeral 13 is provided so as to be able to cover the ventilation inlet side of the positive temperature characteristic resistance element 9 disposed at the outlet 11 of the warm air generating unit 5, so that the amount of air flowing to the element can be increased or decreased as appropriate. By driving the damper device, the amount of ventilation to the resistive element 9 is increased or decreased.

The damper device 13 is connected to the tower kotatsu main body 1.
The blade part 14 is driven once by sensing the temperature inside.
As a result, the amount of airflow to the resistance element 9 is automatically increased or decreased. For example, if the temperature of the warm air that can be circulated rises, the blade portion 14 of the damper device 13 will thermally respond to the airflow inlet side of the resistance element 9. The opening is narrowed to reduce the amount of airflow to the resistance element to prevent a rise in temperature within the main body 1 of the tower kotatsu, and in the opposite case, it operates in reverse to increase the amount of airflow.

Of course, the damper device can also be operated manually.

While the damper device 13 blocks ventilation to the resistance element, air is blown from the air vent hole 16 to continue circulating hot air.

One of the infrared lamps 6 is disposed opposite to a positive temperature characteristic resistance element 9 mounted on the hot air generating unit 5 with a gap therebetween.

That is, since the wind blowing out through the resistance element 9 and the air vent hole 16 is blown toward the tube wall of the infrared lamp 6, the wind exchanges heat with the tube wall that generates heat and is turned into hot air. The interior of the tower kotatsu main body 1 is effectively and rapidly heated with heat irradiation.

and the positive temperature characteristic resistance element 9 and the infrared lamp 6.
The infrared lamp 6 is connected in series to a power source as shown in FIG. 7, and the infrared lamp 6 irradiates the lamp 6 at the same time as the power supply starts, exerting a rapid heating effect and heating the inside of the tower kotatsu body 1.

As time passes, one of the positive temperature characteristic resistance elements 9 also starts to generate heat, and the inside of the kotatsu main body 1 is gradually heated up by both elements.

However, in order to maintain the inside of the Yagura Kotatsu main body 1 at a predetermined temperature, the temperature of the airflow to the positive temperature characteristic resistance element 9 is set in advance by the damper device 13 so that the temperature can be freely adjusted. When the set temperature is reached, the amount of ventilation to the positive temperature characteristic resistance element 9 is reduced.

As a result, the resistance value of the positive temperature characteristic resistance element rapidly increases beyond the Curie point Tc, as shown in FIG.

If the infrared lamp 6 connected in series with this infrared lamp 6 is connected to a heating resistor (not shown) that exhibits a linear change as shown in FIG. The voltage applied to the heating resistor rapidly decreases, and therefore the bright red-hot state of the heating resistor rapidly decreases at the Curie point Tc.

Due to this phenomenon, the brightness of the heating resistor is only one point T.
If there is a sudden change (sudden increase, sudden decrease) at point c, the radiant energy of infrared rays will also change rapidly, which makes the person warming himself inside the Yagura Kotatsu feel uncomfortable.

In the infrared lamp 6 of the present invention, the relationship between current and voltage shows an exponential function as shown by A in FIG. 6, and the current of the infrared lamp 6 slows down as the applied voltage decreases or increases. Since the amount decreases and increases, the irradiation of the infrared lamp 6 also changes slowly.

Therefore, when a person taking heat inserts his or her feet into the main body 1 of the Yagura Kotatsu and turns on the power, the blower 8 drives and blows air, and the infrared lamp 6 is energized, and the infrared lamp increases the amount of heat generated and starts irradiating and dissipating heat. It is ventilated and exhibits a rapid heating effect, gradually raising the temperature inside the tower kotatsu main body 1 to an appropriate temperature.

As the temperature rises, the positive temperature characteristic resistance element 9 also starts generating heat.

When the inside of the kotatsu reaches the desired temperature, the damper device 13
responds to heat and adjusts the amount of ventilation to the resistance element 9, and also slowly irradiates heat from the infrared lamp 6 to maintain the desired temperature.

As mentioned above, the hot air kotatsu of the present invention has a ventilation duct equipped with an air blower installed inside the main body of the tower kotatsu, and a large number of ventilation holes provided at the outlet of the duct, and has a positive temperature characteristic that generates self-heating. a resistive element, a damper device provided in the ventilation duct to adjust the amount of ventilation to the resistive element, and a damper device disposed to irradiate the inside of the Yagura Kotatsu body and electrically connected in series with the resistive element; Since it is composed of an infrared lamp whose current and voltage characteristics are exponential functions, a rapid heating effect can be obtained by heat irradiation and heat radiation, and the damper device not only allows the temperature to be set to a desired temperature but also prevents rapid temperature changes. It is possible to provide a warm air kotatsu that provides comfortable heating without causing heat generation.

[Brief explanation of the drawing]

Fig. 1 is an external side view of the warm air kotatsu according to the present invention;
The figure is a bottom view, FIG. 3 is a sectional view from ■ to ■ of FIG. 2, and FIG. 4 is a current -
FIG. 5, which shows the voltage characteristics, also shows its resistance-temperature characteristics. 6 shows the current-voltage characteristics of the infrared lamp used in the present invention, ■ shows the current-voltage characteristics of a commonly used heating resistor, and FIG. 7 is an electric circuit diagram of the present invention. . 9...Positive temperature characteristic resistance element, device, 6...Infrared lamp. 3... Damper

Claims (1)

[Claims] 1. A ventilation duct equipped with an air blower installed inside the Yagura Kotatsu main body, a positive temperature characteristic resistance element that has a large number of ventilation holes provided at the outlet of the duct and generates self-heating, and a positive temperature characteristic resistance element provided in the ventilation duct. a damper device that adjusts the amount of ventilation to the resistive element; and a damper device that is arranged to irradiate the inside of the Yagura Kotatsu body and is electrically connected in series with the resistive element, and whose current and voltage characteristics exhibit an exponential function. A warm air kotatsu consisting of an infrared lamp.