JPH0346477Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an infrared hot air kotatsu that radiates far infrared rays and blows hot air.

[Prior Art] Conventional kotatsu of this type include those that generate radiant heat, such as heaters, and those that cause heat convection, such as hot air blowers. These conventional kotatsu were also used individually, and there were no combinations of them. Therefore, it has been considered to combine a heat generating device that generates radiant heat with a heat generating device that causes heat convection, but this requires separate heat sources and is uneconomical.

[Purpose of the invention] The purpose of the invention is to provide an inexpensive infrared hot air kotatsu that radiates far-infrared rays and causes heat convection using a common heat source.

[Structure of the invention] The infrared warm air kotatsu of the invention is provided with a fan that blows air downward on the inner surface of the ceiling of the kotatsu, and a heating element that heats the air that is fed downward by the fan. a box member provided below the heating element and having an opening through which air supplied from the fan passes downward, and covering the periphery of the heating element;
A flat plate is provided in the opening to change the flow of the air in a circumferential direction in opposition to the direction in which the air is fed through the heating element, and a gap is formed between the flat plate and the box member through which air can pass. forming, and the flat plate is
It is characterized in that it has a larger area than the heating element and is provided with a far-infrared radiating material layer on the surface opposite to the heating element.

With the above configuration, heat convection can be caused by the hot air blown out from the gap between the flat plate and the box member, and the flat plate is heated by the hot air and the far-infrared radiating material layer is heated. Far infrared rays can be radiated from the far infrared ray radiating material layer.

[Examples] The present invention will be described in detail below using illustrated examples.

The embodiment shown in FIGS. 1 to 3 is an embodiment of the infrared warm air kotatsu of the present invention, and this kotatsu 1 has a frame 2 and a heat generating device 3. The frame body 2 is made up of legs 4, 4... and a ceiling board 5. The heat generating device 3 is attached to the inner surface of the ceiling plate 5 of the frame body 2. The heat generating device 3 includes a base frame 6 attached to the ceiling plate 5 of the frame body 2, as shown in detail in FIGS. 2 and 3.
have. The base frame 6 has a flange portion 7 at its upper end, and a peripheral wall portion 8 that hangs down from the flange portion 7.
It also has Air intake ports 9, 9, .
An air chamber 11 whose contour shape matches that of the peripheral wall 8 of the base frame 6 is attached to the flange 10 . The air chamber 11 has a box member 12 whose lower end is open and a flat plate 15 disposed to form a gap 14 between the opening 12a of the box member 12. The gap 14 between the air chambers 11 and 12 is configured as a jetting port for jetting out the air inside the air chamber 11. The flat plate 15 has legs 16,1 on the bottom 12b of the box member 12.
6,... are integrally attached via... An air passage hole 17 is formed in the center of the bottom 12b of the box member 12, and a heating element 18 is disposed within the air chamber 11 so as to cover the air passage hole 17. The heating element 18 is a nichrome wire heating element, a honeycomb-shaped ceramic heating element, or the like that allows air to pass therethrough and exchanges heat with the air passing through it. An electric fan 19 is disposed outside the bottom portion 12b of the box member 12 in correspondence with the air passage hole 17, and this fan 19 connects the air intake ports 9, 9, . . . of the base frame 6 with each other.
Air is sucked in from the heating element 18 and the air is supplied to the heating element 18. The outer surface of the flat plate 15 of the air chamber 11 is coated with a far-infrared radiating material layer made of alumina, silica, and zirconia-based ceramics to form a far-infrared radiating material layer 20. A heat insulating material 21 is provided.

In the kotatsu of the above embodiment, when the heating element 18 is heated and the electric fan 19 is driven, air is sucked in from the air intake ports 9, 9, . 11
The liquid flows through the inside and ejects to the outside from the gap 14 (see solid line arrows in FIGS. 1 and 2). At this time, the flat plate 15 is heated by the heated air in the air chamber 11, and the far-infrared radiating material layer 20 is also heated, so that the far-infrared rays are radiated from the far-infrared radiating material layer 20 (see Fig. 1 and (See the dashed arrow in Figure 2.) This allows convection of heated air and radiation of far-infrared rays to be performed simultaneously.

Of course, the far-infrared radiating material layer may be formed on the outer surface of the air chamber in a portion facing the inside of the kotatsu.

[Effects of the invention] As described above, according to the invention, the air fed by the fan is heated by the heating element, the heated air is caused to convect on the upper surface of the flat plate, and is ejected from the gap. Further, the heated air causes far infrared rays to be radiated from the far infrared ray radiating material layer on the surface of the flat plate opposite to the heating element. Therefore, convection of heat and radiation of far infrared rays can be performed using a common power source, which is inexpensive, and the temperature of the air ejected from the gap is almost constant regardless of the position of the fan or heating element. There is also the advantage that the far infrared rays are heated uniformly and uniformly, and the far infrared rays are evenly radiated from the entire far infrared rays radiating material layer, so that the entire far infrared rays are heated uniformly.

[Brief explanation of drawings]

Fig. 1 is a partially sectional front view showing an embodiment of the far-infrared warm air kotatsu of the present invention, Fig. 2 is an enlarged sectional view of the heat generating device shown in Fig. 1, and Fig. 3 is the heat generating device shown in Fig. 2. FIG. 3... Heat generating device, 11... Air chamber, 1
8... Heating element, 19... Fan, 20... Far-infrared radiating material layer.

Claims (1)

[Scope of utility model registration request] A fan that feeds air downward is provided on the inner surface of the ceiling of the kotatsu, a heating element that heats the air that is fed downward by the fan is provided below the fan, and the air that is fed from the fan is A box member that covers the periphery of the heating element having an opening that passes downwardly is provided, and a flat plate that changes the flow of the air in a circumferential direction in opposition to the direction in which the air is fed through the heating element is provided in the opening. a gap through which air can pass between the flat plate and the box member; An infrared warm air kotatsu equipped with a layer of radiant material.