JPH0814581A - Electric stove to be installed at desk - Google Patents

Abstract

PURPOSE:To provide an electric stove to be installed at a desk in which the heating efficiency is so high as to be used in a relatively narrow space under the desk and the power source switching operation is easy and which has no riskiness of damage, burn, etc., of clothing. CONSTITUTION:Reflecting heat insulation plates 5 are so provided as to be opposed to a far infrared radiating panel heater element 1a and the rear surface of the element 1a. A body case 4 is surrounded on the peripheries of them. A far infrared radiating opening 2 is provided at the front surface of the case 4. A natural convection discharge hole 3a and a suction hole are respectively provided at the top and bottom surfaces. A fixing fitting 6a for installing a desk is disposed on the back surface of the case. Further, a wired or ratio remote operation power source switch which can be installed at the arbitrary place of the desk is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric stove for installing a desk, and more particularly, to an electric stove installed at an arbitrary place under the desk by using a fixing means provided on a main body cover of the electric stove. The present invention relates to an electric stove for heating the legs of a person who burns.

[0002]

2. Description of the Related Art A conventional household electric stove has a near-infrared reflection heating type and / or a warm air heating type stove in which a quartz tube or a quartz rod is red-heated and has a PCT (positive temperature coefficient) characteristic. BACKGROUND ART A warm air heating type stove using a heater element, a natural convection heating type stove using such a heater element or a sheath heater element, a sheet-like radiant heater and the like are known.

[0003]

However, among the various conventional stove products as described above, the near-infrared reflective heating type stove and the warm air heating type stove require the following in order to be used under a desk. There are some technical problems that need to be solved. That is, 1) These conventional products generally set the heat generation temperature of the heater element on the assumption that they are used in a relatively large space such as a room. Since the temperature is relatively high and the space under the desk is relatively small, it is dangerous because the stove cannot obtain the minimum necessary space and distance for ensuring safety.

2) When the skin of a human body covered with clothes having a high heat absorption rate is heated by using near infrared reflection heating or warm air heating, as is well known, these heating methods are used as a heat source. This is an indirect heating method that heats air, which is an intermediate heat medium, and uses it. Since the method is a hot air heating method that uses heat conduction, the clothes absorb most of the heat. From this, it is understood that it is the heat generation temperature of the heated clothes that the skin feels the heat.

From this, if the above conventional product is used under a desk, the hot air obtained from the stove is
Clothes with a high heat absorption rate such as pants and skirts covering the legs of the seated person absorb heat, so the clothes themselves are hotter than the ambient temperature inside the clothes felt by the legs, Not only can you injure your clothes, but you may also burn your legs by touching them.

3) Further, since the quartz tube, the quartz rod, and the heater element having the PTC characteristic have a relatively small heating area,
In order to diffuse the heat rays to the front of the stove, auxiliary equipment such as heat-reflecting auxiliary equipment and air blowers are required, and these equipments and air layers for heat insulation occupy a lot of space inside the main body cover. Therefore, the width of the main body cover becomes thicker, and the distance from the stove to the legs of the human body becomes a very short distance, which further promotes the above-mentioned danger and makes it difficult to install it under a narrow desk. . There is also a risk of accidentally hitting a leg and getting injured.

4) Further, the warm air type stove using the air blower is harmful to the environment due to dust scattering due to forced air blowing and noise generated from the air blower.

5) Since each of the above-mentioned conventional products is not provided with a fixing means for installing a desk, it is generally prevented from falling due to a shock when hitting a leg at a close range or being accidentally kicked. It is difficult and there is a problem in safety when installed under a desk.

6) The conventional natural convection type heating stove is characterized by a gentle heating effect, and because of the hot air heating method, the heating efficiency is poor, and when it is desired to warm up quickly, the atmosphere of the whole air under the desk is reduced. It is necessary to raise the temperature, and since it is not possible to directly heat the legs, it is necessary to simply increase the amount of heat radiation, and increasing the power consumption tends to increase the operating cost.

7) Further, for example, in the sheet heater disclosed in Japanese Utility Model Laid-Open No. 3-80994, a heat insulating plate is not provided between the heater element and the body cover, and the body cover also radiates heat. There is no hole, so if you use it for a long time,
The body cover itself is heated up to near the heat generation temperature of the heater element, which is dangerous.

8) Further, the above-mentioned various conventional products are generally
Since the main body cover is equipped with a power on / off switch, for example, when installing it under a desk and trying to heat it, it is necessary to dive under the desk each time to operate this switch. You are forced to have a cramped posture / movement. In addition, since the stove is provided in the back under the desk, it is difficult to visually check the on / off state of this switch, and there is a possibility of forgetting to turn off the power.

Therefore, the present invention solves the above-mentioned problems of the conventional products and further can be used not only for office desks but also for counter desks, work desks, folding long desks, study desks and the like. It is possible, and even when used in a narrow space under the desk, there is little danger to the human body and the equipment around the stove,
It is an object of the present invention to provide an electric stove for installing a desk, which is excellent in heating efficiency and can comfortably and safely eliminate the coldness of human legs.

[0013]

For this reason, in the present invention, an electric stove for desk installation of this kind is (1) a plate-shaped heater element having a far-infrared radiation surface on its surface side, and this heater element. A plate member having a heat ray reaction facing away from the back surface of the heater element, and enclosing the heater element and the outer peripheral portion of the plate member, the far infrared radiation opening in the cover front surface portion facing the heater element front surface side, Further, the cover ceiling surface and the bottom surface or their vicinity have a discharge hole and a suction hole for natural convection, respectively, and the back surface of the cover has a main body cover provided with fixing means for installing a desk, Or (2) a plate-shaped heater element having a far-infrared radiation surface on the front surface side and a back surface formed of a heat insulating material, and surrounding the outer peripheral portion of the heater element,
The far-infrared radiation opening is provided on the front surface of the cover facing the front surface side, and the emission hole and the suction hole for natural convection are provided on the cover ceiling surface and the bottom surface or in the vicinity thereof. At the same time, the rear surface of the cover is configured to include a main body cover having fixing means for installing a desk, and further, (3) is separated from the main body cover in the above (1) or (2). It is an object of the present invention to achieve the above object by providing a wired or wireless remote control power switch that can be installed anywhere on a desk independently of a power cord.

[0014]

With the construction of the present invention as described above, it can be applied to a wide variety of desk types, and even if it is used in a relatively narrow space under the desk, it poses a risk to the human body and objects around the stove. The heating efficiency is low, and the heating purpose can be comfortably and safely achieved.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on a plurality of embodiments; (First Embodiment) FIG. 1 is a partial sectional perspective view of a first embodiment of an electric stove for desk installation according to the present invention. A diagram and a bottom view thereof are shown in FIG. 1a has a sheet shape or a substantially rectangular plate shape,
A far-infrared radiation surface-shaped heater element having far-infrared radiation formed on at least the front surface of the front and back surfaces thereof. 5
Is made of metal, ceramics, wood, synthetic resin, glass fiber, foam, porous material, gypsum, asbestos, etc., in the form of sheet, plate, corrugated plate, honeycomb, pipe raft or pipe. A heat-reflecting plate integrally formed in a comb shape, and a heat ray reflecting plate made of metal, ceramics, mirror, synthetic resin, or the like is adhered or fixed to at least a part of the reflection heat-insulating plate. On the back surface of the planar heater element 1a, the reflecting surfaces of the heat insulating plate 5 are arranged so as to face each other and are arranged at a certain distance.

Reference numeral 4 denotes a main body cover provided on the outer peripheral portion of the heater element 1a and the reflective heat insulating plate 5, and is provided on the outer surface side of the heater element 1a and on the inner surface of the front surface portion of the main body cover 4. The main body cover 4 is provided so as to at least partially face each other. The main body cover 4 is made of metal or synthetic resin and is formed in any design shape.

A far-infrared radiation opening 2 having a single or a plurality of openings is provided on the front surface of the body cover 4 so as not to block far-infrared rays emitted from the far-infrared radiation surface heater element 1a as much as possible. There is.

Further, as shown in FIGS. 1 and 2, at least one is provided on each of the top surface and the bottom of the body cover 4 so that the heat stored in the body cover 4 can be efficiently radiated by natural convection. The natural convection discharge hole 3a and the natural convection suction hole 3b having the above openings are provided.

Furthermore, as shown in both figures, a pair of fixing members 6a formed in a rail shape or a hook shape on at least a part of the main body cover 4 using metal or synthetic resin.
Is provided, and the receiving member 6b of the fixing member 6a having an appropriate shape formed of metal or synthetic resin is attached or fixed to an appropriate position under the desk, for example, the back panel 15 or the like. By locking this fixing tool 6a to the receiving tool 6b, it can be installed safely and securely under a desk. In the figure, 8
Shows a power cord with a plug at the tip.

Next, the operation of the above configuration will be described; when this stove is energized through the power cord 8, the far infrared ray radiating surface heater element 1a heats and the emitted far infrared ray covers the main body. It is radiated to the outside of the main body cover 4 from the far infrared radiation opening 2 on the front surface of 4. Further, the far infrared rays or heat rays emitted from the back surface of the heater element 1a are reflected by the action of the reflection heat insulating plate 5 having a heat ray reaction provided on the back surface of the heater element 1a, and the reflected far infrared rays or heat rays are heated by the heater. Since the element 1a is heated to promote heat generation, the time required to reach the set heat generation temperature can be shortened.

Further, the heater element 1a, which has a larger heat generation area than that of the conventional heater element, is installed upright almost vertically.
By providing the suction / discharge holes 3b / 3a for natural convection, it is possible to increase the contact time between the air sucked in from the natural convection suction hole 3b and the heater element 1a which is generating heat, and the hot air that naturally convection is generated. The effect of further heating is obtained. Further, by narrowing the space between the heater element 1a and the reflective heat insulating plate 5 and reducing the volume of air, the heating effect is further enhanced, and hot air having a temperature closer to the heat generation temperature of the heater element 1a is naturally convected by natural convection discharge holes 3a. Release from.

As described above, the heating efficiency can be improved by adopting the combined radiant / convective heating structure in which far infrared radiation heating and natural convection heating are positively and highly utilized.

(Second Embodiment) Although the reflective heat insulating plate 5 is provided independently of the heater element 1a in the above embodiment, it is omitted for the purpose of thinning the stove and reducing the cost. Then, as the second embodiment, the back side of the heater element 1a may be formed of a heat insulating material. In particular, illustrations are omitted.

(Third Embodiment) FIG. 3 shows a third embodiment of the present invention.
The partial cross-sectional perspective view (equivalent figure of FIG. 1) of an Example is shown. The power on / off switch 7 for remote operation by wire or wireless, which can be installed anywhere on the desk, can be installed by a magnet body, velcro, double-sided tape, sucker, clip, stud-shaped or hook-shaped fixing means. In addition, since the power can be turned on and off by hand, the power can be turned on and off easily, and the state of the power on and off can be easily confirmed visually.

This embodiment can be applied to any of the first and second embodiments or each of the embodiments described later.

(Fourth Embodiment) The following embodiments can be adopted in the first to third embodiments. That is, although not shown in the drawing, the reflection heat insulating plate 5 in FIG. 1 is formed into a sheet shape, a plate shape, or a substantially corrugated plate shape using metal, ceramics, a mirror, or synthetic resin, and a metal, ceramics, or wood. , Synthetic resin, glass fiber, foam,
Divided into a sheet-shaped, plate-shaped, approximately corrugated plate-shaped, substantially honeycomb-shaped, pipe raft-shaped or pipe comb-shaped heat insulating plate using a porous material, plaster, asbestos, etc., and providing an air layer between them May be. Further, the facing air layers divided into the reflection plate and the heat insulating plate may have a multi-layer structure using at least one or more of these reflection plates or heat insulating plates.

(Fifth Embodiment) FIG. 4 is a view corresponding to FIGS. 1 and 3 of still another fifth embodiment. Instead of the far-infrared radiation surface heater element 1a in the first to fourth embodiments, FIG. Planar heater element and / or PTC that does not emit far infrared radiation
You may use the planar heater element 1b which has a characteristic. However, in this case, a sheet-shaped or substantially plate-shaped far-infrared radiation sheet 9 having far-infrared radiation at the time of heating is adhered, adhered or provided at a certain distance on the front surface portion of the planar heater element 1b. In this way, far-infrared radiation heating is realized.

(Sixth Embodiment) Further, although not particularly shown,
All surfaces including the far-infrared radiation opening 2 and the natural body flow emission hole 3a and the natural convection suction hole 3b except the rear surface of the body cover 4 shown in FIGS. Except for the side surface, the entire surface including the far-infrared radiation opening 2, the natural body flow emission hole 3a, and the natural convection suction hole 3b, or the back surface of the body cover 4, the top surface, and the bottom surface are all surfaces. It is also possible to provide a main body cover which is made of a metal and / or a synthetic resin and has a substantially net-like shape and / or a substantially fence-like shape, which is a single body or a composite body. The overall illustration is omitted.

(Seventh Embodiment) FIG. 5 shows the seventh to first embodiments of the present invention.
Example 0 will be described in each part of a common partial sectional perspective view. In the seventh embodiment, a transparent or semitransparent ceramic, synthetic resin, glass or silicon that does not block far infrared rays is provided on the entire surface or at least a part of the far infrared radiation opening 2 provided on the front surface of the body cover 4. Is used to provide the far-infrared radiation window 11 formed in a sheet shape, a substantially plate shape, or a thin film shape.

(Eighth Embodiment) In FIG. 5, a human body detecting sensor 10 for detecting the presence of a human body is provided on a part of the main body cover 4 or a part of the case of the power on / off switch 7.
You may make it possible to operate the power supply ON / OFF auxiliary.

(Ninth Embodiment) Further, referring to FIG. 5, a part of the power on / off switch 7 or a part of the case of the switch 7 emits light having an appropriate luminous intensity so that the power on / off state can be confirmed. It is convenient to have.

(Tenth Embodiment) In FIG. 5, a temperature controller 13 capable of arbitrarily setting the heat generation temperature of the far-infrared radiation surface-shaped heater element 1a is provided in the main body cover 4, a part of the power switch 7, or this switch 7. It may be provided as part of the case.

(Eleventh Embodiment) FIG. 6 is a rear perspective view of the eleventh embodiment, showing an embodiment in which a magnet plate 14 is provided on at least a part of the rear surface of the main body cover 4 as a means for fixing to a desk. Indicates. The iron piece member fixed to the back panel 15 on the rear surface of the desk is used.

(Twelfth Embodiment) FIG. 7 shows a front view of one installation example. If there is no illustrated back panel 15 installed under the rear surface of the desk, a metal, synthetic resin, leather, cloth, paper or the like is used to hang it from a part of the desk in a belt shape, a string shape, or a substantially chain shape. It goes without saying that it may be installed by hanging it with a hanging tool, or it may be installed at an appropriate position under a desk by providing a self-standing stand that is appropriately formed using metal or synthetic resin.

[0035]

As described above, according to the electric stove for installing a desk according to the present invention, even if the electric stove is used in a relatively narrow space under the desk, the space is almost the same as before the stove is installed. Can provide a certain foot space,
Radiation composed of a far-infrared radiation surface heater element and an arrangement structure of a reflection heat insulating plate or heat insulating material and a far infrared radiation opening provided in the main body cover, a natural convection emission hole, a natural convection suction hole, etc.・ By convection combined heating structure,
Since far-infrared radiation heating and natural convection heating can be used positively and highly efficiently, improvement in heating efficiency can be expected.

Moreover, since far-infrared radiation, which is a feature of the far-infrared radiation surface-shaped heater element, is effectively utilized, the following effects can be further obtained. That is, 1) Most of the clothing materials, whether natural or synthetic, have a high far-infrared transmittance and penetrate into the human skin without absorbing radiation into the clothing, so they absorb heat like conventional products. There is no fear of causing damage to clothes, which is caused by the high rate of clothes absorbing heat and becoming high temperature, and burns caused by the skin touching the clothes.

2) The heating of the present invention employs a combined radiant / convective heating structure utilizing radiant heating and natural convection heating.
Since efficient heating is possible, there is no need for an air blower such as a warm air stove, so there is no dust winding and no noise from the blower fan or motor.
It no longer damages the environment and eliminates the discomfort caused by blowing hot air. Furthermore, since there is no air blower, the weight, the size of the main body, and the number of parts can be reduced, and a light, thin, and simple structure is obtained.

3) By installing under the desk using the fixing means provided on the main body cover, when heating, a necessary and optimum distance from the main body of the stove to the legs of the human body can be obtained, and the earthquake In addition, since it is possible to prevent the user from falling due to an impact when the user is kicked, a comfortable and comfortable heating can be obtained.

4) When the heating efficiency in the front direction of the stove is compared with that of the stove of the present invention and the conventional product, the conventional heating method is to heat the heat source and the air which is the intermediate heat medium, and utilize the heat. Since it is indirect heating, it requires a lot of heat energy, but the far-infrared radiation heating of the present invention improves heating efficiency because it is directly heated by radiant energy, and due to indirect heating, sufficient heating is possible even at lower temperatures than conventional products. The effect is obtained. This effect can greatly contribute to reduction of power consumption and improvement of safety.

As described above, the far-infrared radiation heating, natural convection heating, combined radiant / convection heating structure, and fixing means for installing the desk, etc. provide a safe and excellent heating effect when used in a narrow space under the desk. Can be demonstrated.

Further, by using a power on / off switch for remote operation by wire or wireless that can be installed at any place on the desk, the power switch can be operated at hand and is provided on the main body cover. It is not necessary to dive under the desk to operate the power on / off switch. As a result, since the switch can be frequently turned on and off, the operating cost can be suppressed, and further, the visual confirmation can be facilitated, and the erroneous operation can be prevented.
Moreover, by avoiding installing a switch in the middle of the power cord and by making the switch and the power cord independent, wiring of the power cord from the main body cover to the outlet can be simplified, and the cord can be attached to a person's leg or chair's leg. The effect of preventing the risk of being entangled is also obtained.

[Brief description of drawings]

FIG. 1 is a partial sectional perspective view of a first embodiment.

FIG. 2 is a bottom view of FIG. 1;

FIG. 3 is a partial sectional perspective view of a third embodiment.

FIG. 4 is a partial sectional perspective view of a fifth embodiment.

FIG. 5 is a partial sectional perspective view of seventh to tenth embodiments.

FIG. 6 is a rear perspective view of the eleventh embodiment.

[Figure 7] Front view of one installation example

[Explanation of symbols]

 1a Far-infrared radiation surface heater element 1b Surface-heater element 2 Far-infrared radiation opening 3a Natural convection emission hole 3b Natural body flow suction hole 4 Main body cover 5 Reflective heat insulating plate 6a Fixing tool (fixing means) 6b Fixing receiving tool (Fixing means) 7 Power on / off switch 8 Power cord 9 Far infrared radiation sheet 10 Human body detection sensor 11 Far infrared radiation window 12 Light emitter 13 Temperature controller 14 Magnet plate 15 Back panel

Claims (3)

[Claims] 1. A plate-shaped heater element having a far-infrared radiation surface on its front surface, a plate member having a heat ray reaction facing the back surface of the heater element apart from each other, and outer peripheral portions of the heater element and the plate member. The far-infrared radiation opening is provided on the front surface of the cover, which faces the heater element surface side, and the emission holes and suction holes for natural convection are provided on the cover ceiling surface and the bottom surface or in the vicinity thereof. An electric stove for installing a desk, comprising a main body cover having a hole and having a fixing means for installing the desk on a rear surface of the cover. 2. A plate-shaped heater element having a far-infrared radiation surface on its front surface side and a back surface formed of a heat insulating material, and a front surface of the cover which surrounds the outer peripheral portion of the heater element and faces the front surface side. In the part, the far infrared radiation opening,
Further, the cover ceiling surface and the bottom surface or their vicinity have a discharge hole and a suction hole for natural convection, respectively, and the back surface of the cover has a main body cover provided with fixing means for installing a desk, An electric stove for installing a desk, characterized by comprising: 3. The desk according to claim 1, further comprising a wired or wireless remote control type power switch that can be installed anywhere on the desk apart from the main body cover, independently of the power cord. Electric stove for installation.