JPH0243007Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a heating element for an electric kotatsu used in ordinary homes to heat the kotatsu in winter.

Conventional Technology The heating element of a conventional electric kotatsu is generally a heating element unit equipped with an infrared heater attached to the center of the ceiling of the kotatsu tower. For this reason, the convection heat generated by the infrared heaters heats the tower ceiling too much, forcing the entire unit to be lowered, and the heating element unit, which protrudes greatly inside, to be heated at the same time. I was getting used to it. Furthermore, recently, so-called furniture-style kotatsu, which are used 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 the large, protruding heating element unit thinner in appearance. Ta. Therefore, in order to make this heating element unit thinner, we published Japanese Unexamined Patent Application Publication No. 1983-
66653 is publicly known, but specific examples include:
As shown in the structural diagram shown in Fig. 2, it has been made thinner. To explain this conventional example, the motor 4 is mounted in the center of the heat generating unit 82 with the fan 41 facing upward, and the air flow is controlled outside the fan 41 so as not to hit the air flow C blown to the outer periphery by the fan 41. A lamp-shaped thin tube infrared heater 3 was installed below. This structure is reasonable from a heating perspective, and it has become possible to make the heating element unit 82 thinner, which was the original objective. However, in actual structure, the infrared heater 3 and the guard 8 are close to each other, and the guard 8 in this part is not cooled by the air sucked in by the fan 41, so the infrared heater 3 is used to protect the nearby guard 8. As a result, the temperature became too high, and in order to prevent this, a heater cover 9 was provided with a small hole to partially cut out the infrared radiation that heats the guard 8, and it was necessary to take measures against overheating of the guard temperature. Therefore, the heater cover 9 simultaneously reduces the amount of infrared radiation into the kotatsu, resulting in less heating effect within the kotatsu due to infrared rays. 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 at the bottom of the infrared heater 3, but at the fan closest to the fan 41. 41
Since much air is sucked in from the lower guard 8 surface of the infrared heater 3, the cooling effect of the lower guard 8 surface of the infrared heater 3 cannot be obtained. In addition, fan 41 and infrared heater 3
Considering the positional relationship, the infrared heater 3 is generally a lamp heater with a length of 100 to 200 mm and a thickness of about 10 mm, so if you install two parallel heaters on the outside of the fan 41, the fan 41 will spread the heat evenly around the outer periphery. Among the blown air, the air passing above the heater receives convective heat from the infrared heater 3 and becomes warm air, which warms the surrounding area of the tower as an extension, but the heater is heated at right angles to it. Air flowing in two directions that are not installed is blown out without becoming sufficiently warm air, making it difficult to warm the area around the tower as an extension, and the temperature distribution within the tower tends to vary widely, causing air to flow in various directions. When I sat down to take my temperature, the feeling of being warm was not good. Also, from the perspective of the shape, in the known heating structure, the fan 41
In order to install heater 3 and heater 3 side by side,
Although it is possible to make the heating element unit 81 thinner, it is difficult to make it more compact, and the heating element unit 81 has to be larger in plan. Furthermore, when looking at comfort during heating and temperature collection in terms of performance, known heating uses infrared rays and hot air from an infrared lamp heater, but this infrared ray is not only compact, but also provides visual warmth and power up. After that, it is advantageous in terms of rapid heating because it can quickly obtain infrared rays, but since the filament is high temperature, it mainly emits near-infrared rays with short wavelengths, so you feel a stimulating warmth when taking heat. However, I couldn't get the feeling of being warmed to the core of my body. This is heater cover 9
In some respects, infrared rays are blocked by
This is due to the relationship between the wavelength of the infrared rays emitted as a characteristic of the infrared rays and the infrared wavelength absorption characteristics of the futon inside the kotatsu and the skin and clothing of the warmer.The wavelengths with good infrared absorption efficiency are long wavelength infrared rays, so-called far infrared rays. It is well known in the literature that the infrared rays emitted by an infrared lamp heater are near infrared rays, and the absorption characteristics thereof are inferior to far infrared rays.
As described above, the heating in the known examples relied on near infrared rays and hardly included far infrared rays, which caused the above-mentioned feeling. As an improvement measure for this known example, it is possible to apply a far-infrared radiating agent to the heater cover, 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 difficult to be effective, and if the area of the heater cover were increased, the primary radiation from the infrared lamp heater would be further cut off, and the amount of air sucked would decrease, resulting in a complete deterioration of performance. Conceivable.

Problems to be Solved by the Invention As mentioned above, it is possible to make the heating element unit thinner by using the structure of the known example, but the structure of this known example has the problems described above. In other words, the airflow caused by the arrangement of the fan and the infrared lamp heater and the poor temperature distribution due to the poor placement of the heater, the poor feeling of warming because the infrared only relied on near infrared, and the effect of infrared rays. There are many problems, such as the fact that the original effect of infrared rays is reduced due to the heater cover that hinders its practical use, and even if the heating element unit can be made thinner, it becomes larger in plan and lacks compactness. There was a problem that needed to be solved.

Measures to solve the problem: A steel plate guard with a radiation port that also serves as an intake port and a blowout port on the outer periphery and a flocked surface, the motor, fan, infrared heater, and almost the entire upper part of the guard. In a heating element unit consisting of a covering reflector, an air path is formed in the space surrounded by the reflector and the guard through the radiation port at the bottom of the fan and air is discharged from the outlet on the outer periphery. An infrared heater was installed in the wind path on the windward side of the fan between the two, and above the radiation port.

Function: The air flow from the arrangement of the fan and the infrared lamp heater and the arrangement of the heater are good, resulting in a good temperature distribution. The problem is that the obstructing heater cover can be removed, the effect of infrared rays can be increased, and 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 multi-mounted shape and treated with flocking 10 made of synthetic fibers, etc. There is a small hole in the center for cooling the motor, and a small hole on the outside that will be the bottom of the heater. A hole 11 that is large enough to prevent a finger from entering is provided to provide a radiation port 11 that serves as a suction hole, and an air outlet 12 formed by cut and raised ribs is provided on the outer periphery, and the flat surface other than the hole is used as a heat radiation surface. It is set at 13. 2 covers the entire parts such as the fan, motor, infrared heater, etc. by drawing a thin steel plate, and forms a space between the guard 1 and the guard 1 by aligning the outside of the air outlet on the outer periphery of the guard 1. 3 is an infrared heater made of a thin quartz tube lamp heater. 4 is guard 1 with the rotation axis facing upward.
This is a motor fixed to the upper center via a base 5. 41 is a fan, which is equipped with radial blades made of aluminum plate and having a diameter of about 15 cm.
Reference numeral 5 denotes a base, which is provided with a part that reflects infrared rays from the infrared heater 3 to heat the motor 4, on which the motor is attached, and serves as a stand on which these are attached to the guard. 6
is the top board at the top of the tower made of wood fiber board.
Its outer periphery is held by the middle machine 7 of the tower 72.
81 is a heating element unit with guard 1, motor 4,
It consists of a fan 41, a reflector 2, a base 5, an infrared heater 3, etc. A is near-infrared rays emitted from the infrared heater 3 into the kotatsu. B is far infrared rays radiated from the heat radiation surface 13 of the guard 1 heated by the infrared heater 3. C is the radiation port 11 of guard 1
around infrared heater 3, fan 4
1, flows along the reflecting plate 2, and is blown out from the outlet 12 into the kotatsu.

The functions 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 the guard 1. The motor 4 is attached to the center of the guard 1 with the fan 41 facing upward, and the infrared heater 3 is attached to the guard 1 and the outer periphery of the fan 41. A large number of suction holes for emitting radiation are provided near the infrared heater 3, that is, on the lower guard surface, and blowout holes 12 are provided all around the guard 1 in the outward direction of the fan 41. The fan 4
A heat generating unit 81 is configured to blow out air from the blowing hole 12 along the reflecting plate 2 to the outside.
With the parts arrangement and guard as described above, when the infrared heater 3 and motor 4 are energized, the infrared heater 3 is lamp-shaped, so it lights up quickly.
Since near-infrared rays of a short wavelength are emitted, the near-infrared rays are radiated into the kotatsu from a suction hole 11 provided near the suction hole 11 which also functions as radiation and emission, brightening the inside of the kotatsu and giving a stimulating feeling of warming peculiar to near-infrared rays. In addition, the infrared rays that are irradiated onto the back side of the guard 1 without passing through the suction hole 11 heat the guard surface, and emit long-wavelength far-infrared rays at a surface temperature of about 80 to 110 degrees Celsius from the wide guard surface other than the hole. do. Furthermore, the air sucked in by the rotation of the fan 41 is sucked in through the suction hole 11 provided near the infrared heater 3, and is heated by convection heat from the surface of the infrared heater and heat from the heater surface to become warm air. The hot air is uniformly distributed around the outer periphery of the guard, and is then blown out at a uniform temperature from the air outlet 12 provided on the outer periphery of the guard.
In this way, the infrared heater 3 emits near-infrared rays from the suction port 11 and far-infrared rays from the guard 1 surface, and constantly cools the part of the guard 1 that is most easily heated by using the suction hole 11 with the fan 41. To prevent overheating of the part guard 1. Furthermore, the arrangement of the infrared heater 3 and the fan 41 allows uniform hot air to be blown out around the outer circumference, improving temperature distribution. Further, in this arrangement, the infrared heater 3 and the fan 41 can be stacked three-dimensionally, so that the heating element unit 81 can be made more compact.

Effects of the invention According to the invention, the guard is made of a steel plate, a suction hole and an outlet hole are provided in it, a motor is installed on the center of the guard with the fan facing upward, and the fan and an infrared lamp heater are connected to the fan. The following effects were obtained by arranging the outer blades so as to overlap each other and heating the suction holes which also served as radiation ports.

By using a guard made 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, preventing the guard in this area from overheating, and reducing the amount of infrared rays that was previously used. There is no need for a heater cover to be cut, and this part can be made the largest opening to prevent fingers from getting in. Therefore, sufficient infrared rays can be emitted inside the kotatsu, allowing it to be warmed quickly. It has become possible to obtain sufficient 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 inhaled air always obtains heat from the infrared heater and becomes warm air, and then the fan distributes the hot air evenly throughout the entire periphery. The temperature distribution inside the kotatsu was improved. Furthermore, by stacking the fan and infrared heater three-dimensionally to create the above-mentioned hot air generation structure, the heating element unit can be made more compact, making it cheaper to manufacture and taking up less space.

Furthermore, for heating during heating, in addition to heating using hot air and near-infrared rays using the fan and infrared heater as described above, far-infrared rays, which could not be obtained conventionally, can be used with a steel plate guard and heating as explained above. By doing this, it became possible to obtain a kotatsu based on a single type of near-infrared heater, and it also added the comfort of being warmed to the core of the body when warming, resulting in a kotatsu with a good feeling of warming.

Furthermore, from an efficient point of view, the convection heat generated by the infrared heater is not only used as hot air by the fan, but also the surface of the heater is cooled to forcefully obtain hot air. more effective,
By using near-infrared rays and far-infrared rays without loss and sufficient warm air, it has become possible to efficiently obtain comfort with less electricity.

[Brief explanation of the drawing]

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 a sectional view of the heating element of an electric kotatsu according to the invention. Fig. 4 is a schematic diagram showing the fan, heater, and hot air distribution of the conventional example, and Fig. 5 is a schematic diagram showing the fan, heater, and hot air distribution of the present invention. FIG. 6 is a sectional view of a main part showing the structure of an infrared ray emitting part according to a conventional example, and FIG. 7 is a sectional view of a main part showing a structure of an infrared ray emitting part of an embodiment according to the present invention. 1...guard, 2...reflector, 3...infrared heater, 4...motor, 10...flocking, 11...
...Radiation port, 12...Blowout port, 41...Fan, 8
1... Heating element unit.

Claims (1)

[Scope of utility model registration request] A radiation port 11 that also serves as an intake port and an air outlet 1 on the outer periphery
2 and a guard 1 made of a steel plate with flocking 10 on its surface, a motor 4, a fan 41, an infrared heater 3, and a reflector 2 that covers almost the entire upper side of the guard 1.
In the heating element unit 81 consisting of
In addition to forming an air path for discharging air from the fan 4
An infrared heater 3 is installed in the air path on the windward side of the fan 41 between the fan 41 and the radiation port 11 and above the radiation port 11.
A heating element for an electric kotatsu that is characterized by the installation of.