JPS5827339Y2 - Warm air kotatsu - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention is based on a hot air generation unit that blows air to a positive temperature characteristic resistance element that generates self-heating inside a tower kotatsu and discharges hot air. This relates to a hot air kotatsu that forcedly circulates air.

(b) Conventional technology This type of hot air generation unit for a kotatsu blows air through a self-heating resistor element to discharge hot air.When the inside of the kotatsu reaches a set temperature, a damper device reduces the amount of hot air, and vice versa. When the temperature drops, a damper device is used to increase the amount of airflow to warm up to the desired temperature.

This type of heating system simply discharges warm air, but does not provide radiant heating, making people feel cold at low temperatures.

(c) Purpose of the invention The present invention aims to rapidly raise the temperature inside the Yagura Kotatsu at the initial stage of energization, to exhibit a rapid heating effect at the beginning of energization, and to obtain a comfortable heating effect after the set temperature rises. The purpose of this is to increase the effective height of the kotatsu.

(d) Structure The proposed structure has a ventilation duct installed inside the main body of the Yagura Kotatsu and equipped with a blower, and a large number of ventilation holes provided at the outlet of the duct, and a positive temperature characteristic resistance that generates self-heating. element, a damper device provided in the ventilation duct to adjust the amount of ventilation to the resistance element, and a damper device provided in parallel on one side of the air outlet and provided within a protective net for irradiating the inside of the main body of the yagura kotatsu. The lamp also includes an infrared lamp electrically connected in series with the resistive element, the current and voltage characteristics of which exhibit an exponential function.

When configured as described above, ventilation to the positive temperature characteristic resistance element is blocked, and the resistance increases rapidly beyond the Curie point.
Even if the applied voltage changes, the infrared lamp that generates side radiation heat changes slowly, allowing the person taking the heat to get comfortable warmth.

(e) Embodiment 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 to 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 installed in parallel on one side of 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 on one end of 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 on the other end. are doing.

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 damper device 13 detects the temperature inside the damper device 13 and drives the blade portion 14 to blow the air, thereby automatically increasing or decreasing the amount of airflow to the resistance element 9. For example, if the temperature of the hot air that can be circulated increases, The wing portion 14 of
, 9 on the ventilation inlet side to reduce the amount of airflow to the resistance element to prevent a rise in temperature within the yagura kotatsu body 1, and in the opposite case, to increase the amount of airflow. be.

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 for rapid heating by irradiating the inside of the tower kotatsu body 1 with heat, and is arranged in parallel on one side of the air outlet 11 formed in the hot air generation unit 5. The protective net 15 that covers these is made smaller in height l, and conversely increases the effective height from the floor to the protective net 15.

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 is irradiated 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 body 1 at a predetermined temperature, the temperature of the air flow to the positive temperature characteristic resistance element 9 is preset 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 R 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 decreases rapidly.

Therefore, the brightness and heating state of the heating resistor) is one point T.
It rapidly decreases after reaching C.

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 C, the radiant energy of infrared rays will also change rapidly, making the person warming himself inside the kotatsu feel uncomfortable.

The infrared lamp 6 of the present invention has an exponential relationship between current and voltage as shown in A of FIG. 6, and the current of the infrared lamp 6 slows down as the applied voltage decreases or increases. The irradiation of the infrared lamp 6 also changes slowly because the infrared lamp 6 decreases and increases.

Therefore, when a warmer puts his or her feet inside the Yagura Kotatsu main body 1 and turns on the power, the blower 8 drives and blows air, and the infrared lamp 6 is energized, and the infrared lamp generates a large amount of heat and irradiates heat, producing a rapid heating effect. The temperature inside the yagura kotatsu body 1 is then gradually raised to an appropriate temperature.

As the temperature rises, the positive temperature characteristic resistance element 9 also begins to generate 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.

(F) Effects Since the present invention is as described above, not only can a rapid heating effect be obtained by heat irradiation, and comfortable heating can be obtained without sudden temperature changes around the set temperature, but also the main body of the Yagura Kotatsu The inner effective height dimension is large, resulting in a warm air kotatsu that is easy to use.

[Brief explanation of the drawing]

Figure 1 is an external side view of the warm air kotatsu according to the present invention;
The figure is the same bottom view, and Figure 3 is the lll-II of Figure 2.
4 shows the current-voltage characteristics of the positive temperature characteristic resistance element used in the present invention, and FIG. 5 similarly shows its resistance-temperature characteristics. 6A shows the current-voltage characteristics of the infrared lamp used in the present invention, B shows the current-voltage characteristics of a commonly used heating resistor, and FIG. 7 is an electric circuit diagram of the present invention. 7... Ventilation duct, 9... Positive temperature characteristic resistance element, 13... Damper device, 11...
...Air outlet, 15...Protection net, 6...
・Infrared lamp.

Claims (1)

[Scope of utility model registration request] A ventilation duct installed inside the Yagura Kotatsu main body and equipped with an air blower; a positive temperature characteristic resistance element having a large number of ventilation holes provided at the outlet of the duct and generating 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 installed in parallel with the air outlet, is provided within a protective net to irradiate the inside of the Yagura Kotatsu body, and is electrically connected in series with the resistive element. A hot air kotatsu consisting of an infrared lamp and an infrared lamp whose current and voltage characteristics exhibit an exponential function.