JPS6191458A - Exothermal body for electric foot-warmer - Google Patents

Abstract

PURPOSE:To improve temperature distribution and make an exothermal body unit thin and compact by a method wherein an infrared rays heater is provided in a suction flow path between the suction port of a guard and a fan and air is heated by the convection heat of the infrared rays heater and the heat from the surface of the heater and is blown off to the outer periphery of the guard. CONSTITUTION:In the exothermal body unit, equipped with the infrared rays heater at the center of the ceiling of the foot-warmer, the infrared rays heater 3 is provided in the suction flow path between the guard 1 and the suction port 11 to heat suction air by the convection heat of the heater 3 and heat from the surface of the heater 3, thereafter, is dispersed by the fan 41 to the outer periphery of the foot-warmer and is blown off through the blow-off ports 12 provided at the outer periphery of the guard 1 into the foot-warmer as warm- air. Suction air is heated to warm-air by the infrared rays heater without exception and is blown off uniformly to the whole outer periphery of the foot-warmer, therefore, the temperature distribution in the foot-warmer may be improved. Further, the fan and the infrared rays heater are arranged three-dimensionally and whereby the compacting of the exothermal unit may be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heating element for an electric kotatsu used in general households to keep warm during the winter.

BACKGROUND OF THE INVENTION Conventional electric kotatsu heating elements generally have an entire heating element unit equipped with an infrared heater installed in the center of the ceiling of the kotatsu tower. For this reason, the convection heat generated by the infrared heater heats up the tower ceiling, forcing the entire unit to be lowered. Therefore, the heating element unit that protrudes inside is reduced to 1 during heating, etc. was.

Furthermore, recently, so-called furniture-style kotatsu, which are used all year round as a low table in the summer and a kotatsu in the winter, have become popular, so it has become an urgent need to make this large, protruding heating element unit thinner in terms of appearance. .

Therefore, in order to make this heating element unit thinner, Japanese Patent Laid-Open No. 59
-66653 is publicly known, but as a specific example,
As shown in the structural diagram shown in Fig. 2, it has been made thinner.

To explain this conventional example, the entire motor 4 is mounted in the center of one heating element unit 82 with the fan 41 facing upward, and the air flow 'n-C blown around the outer periphery by the fan 41 is connected to the outside of the fan 41. An infrared lamp-shaped thin tube infrared heater 6 was installed under the stream n to prevent it from being hit. This structure is reasonable from a heating perspective, and it has become possible to make the single heating element unit 82 thinner, which was the original objective. However, in actual structure, the infrared heater 6 and the guard 8
The infrared heater 6
As a result, the temperature of the nearby guard 8 becomes too high, and in order to prevent this, it is necessary to install a heater cover 9 with a small hole that cuts out all of the infrared radiation that heats the guard 8, and to take measures against overheating of the guard. And so. Therefore, the amount of infrared radiation into the kotatsu is also reduced by the heater cover 9, and the heating effect inside the kotatsu due to infrared rays is reduced. This is because the guard 8 has a mesh shape and the infrared heater 3 is located outside the fan 41, so the strength of the suction by the fan 41 on the surface of the guard 8 is not that of the lower part of the infrared heater B.

Since much air is sucked in from the lower guard 8 surface of the fan 41, which is closest to the fan 41, the cooling effect of the lower guard 8 surface of the infrared heater B cannot be obtained.

Also, considering the positional relationship between the fan 41 and the infrared heater B, the length of the infrared heater 3 is generally 100 to 2
Since the lamp heater is 00III++ and has a thickness of about j Q win, install two of them in parallel outside the fan 41.

Among the air evenly blown around the outer circumference by the fan 41, the air passing through the upper part of the heater receives convection heat from the infrared heater 3 and becomes warm air, which also warms the surrounding area of the tower as an extension.

The air flowing in the two directions perpendicular to this, where the heaters are installed, is blown out without being sufficiently warm, so the area around the tower as an extension remains warm. The distribution tended to vary widely, and when I sat in various directions and measured the temperature, the feeling of temperature measurement was poor.

In addition, in terms of shape, it is possible to make one heating element unit 81 thinner because the fan 41 and heater 3 are installed side by side in a plane with the known heating structure, but it is difficult to make it compact. It had to be something big.

Furthermore, when looking at comfort during heating and temperature collection in terms of performance, known heating uses infrared rays and hot air from infrared lamp heaters, but this infrared ray is not only compact, but also provides visual warmth and heat after power is turned on. It is advantageous in terms of rapid heat generation because it can quickly obtain infrared rays, but since the filament is at commercial temperature, it mainly emits near infrared rays with short wavelengths, so it gives a stimulating sense of warmth when taking warmth. I couldn't get the feeling of being thoroughly warmed up in my core. Although infrared rays are partially cut by the heater cover 9, there is a relationship between the wavelength of the emitted infrared rays and the infrared wavelength absorption characteristics of the futon inside the kotatsu and the skin and clothing of the person warming the kotatsu. According to the literature, the wavelength with good infrared absorption efficiency is long-wavelength infrared rays, so-called far infrared rays, and the infrared rays emitted by infrared lamp heaters are near infrared rays, and its absorption characteristics are inferior to far infrared rays. Well known. In this way, the heating in the known example did not include all far infrared rays, but relied on near infrared rays, which caused the above-mentioned feeling. An idea to improve this known example is to coat the heater cover with a far-infrared radiation agent gold, but it is reasonable to emit far-infrared rays as secondary radiation from the heater cover heated by the heater, but the heater cover Since the heat dissipation area is small, it is effective.

If the entire area of the heater cover were to be covered, the primary radiation from the infrared lamp heater would be further cut off, and the amount of air taken in would be reduced, resulting in a complete deterioration of performance.

Problems to be Solved by the Invention As described above, it is possible to reduce the thickness of one heating element unit by using the known example, but this known example has the problems described above. In other words, the temperature distribution is poor due to the air flow caused by the arrangement of the fan and the infrared lamp heater, and the poor arrangement of the heaters.The infrared rays rely solely on near infrared rays, which gives a poor sense of warmth. The original effect of infrared rays is reduced due to the heater cover which prevents effective use, and the heating element unit'r
Even if it could be made thinner, it would still be larger in size and lack compactness, and many other problems still needed to be solved.

Measures to solve the problem After installing an infrared heater in the suction flow path between the guard's suction port and the fan, and converting the intake air into warm air using the convection heat of the infrared heater and the heat from the surface of the infrared heater. The hot air is dispersed around the outer periphery by a fan, and an outlet is provided on the outer periphery of the guard to blow out hot air into the kotatsu.

The air flow from the arrangement of the fan and the infrared lamp heater and the arrangement of the heaters are good, resulting in a good temperature distribution, and the infrared rays are far and near infrared rays, giving a good feeling of warmth. In addition, the heater cover that hinders practical use can be removed, and the effect of infrared rays has been increased.
The solution is that the heating element unit can be made thinner and more compact.

Example Embodiments of the present invention will be described with reference to the drawings.

1 is a guard made of a flat steel plate formed into a slightly chevron shape and treated with flocking 10 made of synthetic fibers on the surface.

A small hole for cooling the motor is provided in the center, and a radiation port 11 is provided slightly on the outside that serves as a suction hole unless a finger is inserted into the lower part of the heater.

Further, on the outer periphery, an air outlet 12 formed by cut-and-raised ribs is bent to form a heat dissipation surface 16 on the entire flat surface other than the hole. 2 covers all parts such as a fan, a motor, an infrared heater, etc. by drawing a thin steel plate, and forms a space between the guard 1 and the outer circumference of the guard 1 together with the outer part of the air outlet. 6 is an infrared heater of a thin quartz tube lamp heater.

Reference numeral 4 is a motor that is fixed to the center of the guard 1 (l) 11 on the rotating shaft metal via the base 5. Reference numeral 41 is a fan made of an aluminum plate with a diameter of 15 cm and a degree in the radial direction. 5 is a base with a part that reflects the infrared rays that heat the motor 4 from the infrared heater 3, and the entire motor is installed, and the guard is a stand for attaching these. 6 is a board made of wood fiber, etc. It is a top plate at the top of the tower, which is held by the outer circumference of the tower 72 with 9 legs 7. 81 is a heating unit, which includes a guard 1. a motor 4. a fan 411, a reflector 2°, a base 5. an infrared heater 3, etc. A is the near-infrared rays radiated into the kotatsu from the infrared heater 3. B is the far-infrared rays radiated from the heat radiation surface 13 of the guard 1 heated by the infrared heater 3. C is the near-infrared rays radiated from the radiation opening 11 of the guard 1. The hot air flows around the infrared heater 3, passes through the fan 41, flows along the reflector 2, and is blown out from the outlet 12 into the kotatsu.

Next, the effects of the present invention are as follows.

The surface of a steel plate formed into a somewhat chevron shape is treated with flocking 10 made of synthetic fiber, etc., and used as guard 1.

The motor 4 is housed in the center with the fan 41 on the upper side, and the infrared heater 3 is installed between the guard 1 and the outer circumference of the fan 41, and radiation is emitted near the infrared heater filter, that is, on the lower guard surface. A large number of suction holes are provided to provide a cooling effect, and an outlet hole 12 is provided all around the guard 1 in the outward direction of the fan 41, and a reflector 2 that covers the entire upper part of the fan 41 and the infrared heater B to the outside of the outlet hole 12, A heating element unit 81 is configured to blow air outward from the blowing hole 12 along the blowing total reflection plate 2 of the fan 41. With the parts arrangement and guard 1 as described above, this infrared heater 3
When the motor 4 is energized, the infrared heater is shaped like a lamp, so it lights up quickly and emits short-wavelength near-infrared rays. death.

It brightens the inside of the kotatsu and provides the stimulating sensation of warmth unique to near-infrared rays. Further, the infrared rays that are irradiated onto the back surface of the guard without passing through all of the suction holes 11 heat the guard surface, and long-wavelength far-infrared rays are emitted from the wide guard surface other than the holes at a surface temperature of about 80 to 110°C.

Furthermore, the air sucked in by the rotation of the fan 41.

Air is sucked in through the suction hole 11 provided near the infrared heater 3, heated by convection heat from the surface of the infrared heater 3 and heat from the heater surface, and becomes warm air.

A fan 41 blows out the air uniformly around the outer periphery of the guard, and then hot air of uniform temperature is blown out from the air outlet 12 provided on the outer periphery of the guard. In this way, the infrared heater 3 emits all of the near infrared rays from the suction port 11 and far infrared rays from the guard 1 surface, and the fan 41 constantly cools the part of the guard 1 that is most easily heated as the entire suction hole 11. This prevents the guard 1 from overheating in this area. The arrangement of the infrared heater 3 and fan 41 allows uniform hot air to be blown out over the entire circumference.

Improve temperature distribution. Also, in this arrangement, the infrared heater 6 and fan 41 are all facing east toward the rear.

The heating element unit 81 can be made more compact.

Effects of the Invention According to the present invention, the guard is made of a gold steel plate, a suction hole and an outlet hole are provided in the guard, a motor is installed in the center of the guard with the fan facing upward, and the fan and an infrared lamp heater are connected to the fan. Lay out the overlapping black on the outer circumference of the blade,
By using the suction hole as a radiation port and heating it further, the following effects were achieved.

By drilling a hole in the steel plate, we were able to limit the suction port, so even if an infrared heater was installed here, there was a cooling effect, and the guard in this area would not be overheated, making it possible to prevent the infrared heater from overheating. There is no need to cut out the entire heater cover, and the largest opening can be made in this area to prevent fingers from getting in. Therefore, sufficient infrared rays are emitted inside the kotatsu, quickly heating it up. Now, you can get plenty of visual brightness and stimulating warmth.

In addition, due to the relationship between the three-dimensional arrangement of the fan and infrared heater and the suction port, the air sucked in always obtains heat from the infrared heater and becomes warm air, and after ;; By blowing warm air around the kotatsu, the temperature distribution inside the kotatsu has improved. moreover.

By stacking the fan and infrared heater three-dimensionally to create the above-mentioned hot air generation method, the heating unit can be made more compact, cheaper to manufacture, and takes up less space.

Furthermore, for heating during heating, in addition to heating using warm air and near-infrared rays using a fan and infrared heater as described above, far-infrared rays, which could not be obtained conventionally, can be used by using a steel plate guard and heating τ as explained above. By using a single type of near-infrared heater, the kotatsu provides the added comfort of slowly warming the body to the core during warming, resulting in a kotatsu with a good warming feel.

Furthermore, from an efficiency standpoint, not only can the convection heat generated by the infrared heater be used as hot air, but it can also be used to cool the surface of the heater and forcefully obtain warm air, making it more effective and reducing losses. Near-infrared rays and far-infrared rays and sufficient warm air provide efficient comfort with less electricity.
It turned out to be a rewarding experience.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a heating element of an electric kotatsu showing an embodiment of the present invention, Fig. 2 is a sectional view of a heating element of an electric kotatsu showing the specific structure of a conventional example, and Fig. 3 is an embodiment of the present invention. An external view of the back side of the tower showing the whole as an example. Fig. 4 is a schematic diagram showing the fan, heater, and hot air distribution of the conventional example, Fig. 5 is a schematic diagram showing the fan, heater, and hot air distribution of the present invention, and Fig. 6 is a schematic diagram showing the conventional example of infrared radiation. FIG. 7 is a cross-sectional view of a main part showing the structure of an infrared ray emitting part according to an embodiment of the present invention. 1... Guard, 3... Infrared heater. 11... Suction Ll, 12... Outlet. 41...Fan. Hitachi Thermal Appliances Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] An infrared heater (3) is installed in the suction flow path between the suction port (11) of the guard (1) and the fan (41), and the infrared heater (3) combines the convection heat of the infrared heater (3) and the infrared heater (
3) The heat from the surface is turned into warm air, which is then dispersed to the outer periphery by a fan (41), and an outlet (12) is provided on the outer periphery of the guard (1) to blow out the hot air into the kotatsu. Electric kotatsu heating element.