JPH10170000A - Heater unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make temperature distribution in a low covered table with a heat source underneath uniform by disposing a heat radiator and a heater so as not to overlap them with each other in a horizontal direction in a frame having a reflecting plate inside an upper surface with a lower surface protected with a netted cover. SOLUTION: A frame 1 is assembled with a bottom plate 2 and a cover 3 opposed to one another. The cover 3 is formed in a netted state by sheet metal working a metal thin plate and punching slot holes 3b over the entire surface. A reflecting plate 4 is provided along a center of the plate 2 and an inner surface of a sidewall 2a in a case 1. Heat radiating fins 5 are fixed as heat radiating plates to a central part of the plate 4 in close contact with a base plate 5a so that the heat sink plate 5b is parallel to one opposed sidewall of the plate 2. Infrared heaters 6 are disposed as heaters between the fins 5 and one of the opposed sidewalls around the fins 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heater unit mounted and used at a position corresponding to the back of a table of a rattling table.

[0002]

2. Description of the Related Art The heater unit has changed from a simple structure in which one infrared lamp is provided at the center to a structure in which a fan is provided in the center and a plurality of infrared heaters are arranged around the fan. Is the mainstream. The former is economical because it is inexpensive and does not require electric power for fans, but the temperature distribution is uneven, such as the corners are not warm even when the temperature is high in the center, and the infrared lamp is large Therefore, the frame protrudes greatly downward, and the knee easily contacts the cover, so the cover is deformed and it becomes distorted, and the user must take a cramped position so that the knee does not touch the cover, so the usability is not good . The latter is advantageous in that the air is circulated to prevent the inside of the frame from being heated, so that it is thin to secure a wide space so that the knees and the like do not come into contact with each other, and the air is agitated due to uneven temperature. Has less advantages.

[0003]

In the latter case, the fan is always running, which is uneconomical, and the rotation sound of the fan is unpleasant, and the scattered greeting in the kotatsu adheres to the fan and the cover. Therefore, if not cleaned frequently, air passages are clogged, and on the contrary, there are many complaints that it is troublesome.
Also, since the motor is used, if the fan stops running due to the motor failure, if the heater is not faulty, it is necessary to refrain from using it. Is forced to stop using while it does not rotate.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a heater unit in which temperature unevenness is less likely to occur without a fan. The heater unit has a structure in which a lower surface is guarded by a mesh cover and a reflector is provided inside the upper surface. The heat radiator and the heat generator are arranged in the frame so as not to overlap each other in the horizontal direction. It is preferable that the heating element is provided at the center and the heat radiator is disposed around the heat radiating element.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a heater unit according to the present invention will be described with reference to the drawings. FIG. 1 is a plan view with a cover removed, FIG. 2 is an explanatory view of a section with a cover in a section taken along line AA and BB in FIG. 1, and FIG. 3 shows a state where the cover is set in a wooden frame of a kotatsu. FIG. 2 is a plan view, and the frame 1 is configured by assembling a bottom plate 2 whose central portion is deeply dropped and a shallow bottom cover 3 so as to face each other. The bottom plate 2 is formed by sheet metal processing a thin metal plate. One of the opposite side walls 2a, 2a has an inclined surface, and the other of the opposite side walls 2b, 2c has one side wall 2b having a stepped inclined surface, The side wall 2c is a vertical plane, and the vertical side wall 2c has a central portion largely cut away from the open side. The cover 3 is also formed by processing a thin metal plate into sheet metal, and the side walls 3a, 3a,... Of the four circumferences are all inclined surfaces, and are formed in a net-like shape by punching long holes 3b, 3b,. Have been.

In the case 1, a reflector 4 is provided along the inner surface of the center of the bottom plate 2 and the side wall 2a. In the center of the reflector 4, a large number of heat radiators are provided on one side of a substrate 5a. 5
A heat radiation fin 5 as a heat radiator having b, 5b,... standing in parallel is fixed to the substrate 5a so that the heat radiation plate 5b is parallel to one of the opposed side walls of the bottom plate 2. I have. Around the radiating fins 5, elongated infrared heaters 6 and 6 as heating elements are arranged between the radiating fins 5 and the one of the opposed side walls 2a and 2a, respectively. 6 are supported at both ends thereof on the steps of the bottom plate 2 via insulating members 6a, 6a,..., And are connected to electric cords 7, 7,.

A plug 8 for connecting an electric cord, a switch 9 having a temperature control function, and the like are collectively provided between the radiating fin 5 and the other opposite side wall 2c of the vertical surface. Electrical wiring is provided for the infrared heaters 6,6. Further, protective plates 3c, 3c are respectively provided on portions of the cover 3 facing the infrared heater. As shown in FIG. 3, this heater unit is set in a wooden frame 11 assembled on the back side of the table surface of the scrambled kotatsu with, for example, screws 10, 10,.

[0008] The heater unit thus formed is
Set in a kotatsu, cover the whole with a futon, turn on the power and heat the infrared heaters 6 and 6. When the infrared heaters 6 and 6 are heated, the radiant heat from the infrared heaters 6 and 6 At the same time, the radiating fins 5 absorb the radiant heat from the infrared heaters 6 and 6, the reflected heat from the reflector 4, and the conduction heat from the reflector 4, and store the heat. When the radiating fins 4 rise to a certain temperature, the stored energy is radiated from the radiating fins 4, and as shown in FIG. In addition to the reflected heat energy, the heat is heated by the auxiliary heat energy radiated from the radiation fins 5, so that the temperature unevenness in the kotatsu is reduced and the actual temperature is increased.

When the power supply is interrupted due to, for example, a bimetal incorporated in the switch 9 due to excessive heating, the radiation of heat from the infrared heaters 6 and 6 ceases, and at the same time the heat energy from the reflection plate is also reduced. Although the heat is interrupted, the heat radiation from the heat radiation fins 4 is continued, so that the temperature does not suddenly decrease and a kind of constant temperature maintaining function is exhibited.

The heater unit has a simple structure having only radiation fins, so that it can be provided at a low cost, and it is advantageous to reduce the thickness by arranging infrared heaters on the left and right. In addition, since no motor is used, there is no extra power consumption, there is no possibility that the motor cannot be used due to a failure other than the heater, and cleaning is hardly required.

In the above embodiment, the radiator fin is used as the radiator. However, a radiator having a different structure such as a porous structure may be used. If you do not wrap, you can change the position, size, number, etc. as appropriate, such as providing a heating element in the center, arranging a heat radiator around it, and alternately arranging the heating element and the heat radiator. For example, the support structure of the heating element, the wiring and the switches, and the like are not limited to the embodiment, for example, the cover is formed of a net, or the heat radiating element and the heating element are attached to the cover.

The use of an infrared heater as a heating element is advantageous in reducing the thickness, but an infrared lamp is used if the purpose is to eliminate only temperature unevenness at the expense of freedom of feet. It does not matter.

[0013]

According to the present invention, it is economical because there is nothing other than a heating element that consumes electric power, the temperature distribution is uniform, the temperature change is small, and comfortable heating is promised. The overall life is also extended. In addition, if the heat radiator is provided at the center and the heat radiator is disposed around the heat radiator, the heat radiator can absorb heat from the plurality of heat radiators, so that the heat radiator has good heat efficiency, and there is no fear of heating even if the fan is omitted. Therefore, the entire heater unit can be formed thin. Furthermore, if the heat dissipating body is a heat dissipating fin, it can be easily formed by die casting or pressing and can be provided at a low cost.

[Brief description of the drawings]

FIG. 1 is an explanatory plan view of a heater unit according to the present invention.

FIG. 2A is an explanatory view of an AA cross section, and FIG.
It is explanatory drawing of a cross section.

FIG. 3 is an explanatory diagram showing a state in which a kotatsu is set.

FIG. 4 is an explanatory diagram showing a heat energy radiating effect from a radiating fin.

[Explanation of symbols]

1. frame, 2. bottom plate, 2a, 2b, 2c side wall, 3 cover, 3a side wall, 3b long hole, 3c
..Protection plate, 4 ... Reflection plate, 5 ... Radiation fins, 5a.
・ Substrate, 5b ・ ・ Heat radiation plate, 6 ・ ・ Infrared heater, 7 ・ ・
Electric cord, 8 plug, 9 switch, 10
Screw, 11 ... wooden frame.

Claims (3)

[Claims] 1. A heater unit in which a heat radiator and a heat generator are arranged so as not to overlap each other in the horizontal direction in a frame whose lower surface is guarded by a net-like cover and whose upper surface is provided with a reflector. 2. The heater unit according to claim 1, wherein the heating element is provided at the center, and the heat radiating element is disposed around the heating element. 3. The radiator according to claim 1, wherein said radiator is a radiator fin.
Or the heater unit according to 2.