JP2003035421A - Heating cooker with radiation electric heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker with a radiation electric heater capable of suppressing and preventing occurrence of a leak or an electric shock due to a decrease of an insulating resistance. SOLUTION: The heating cooker with the radiation electric heater comprises the radiation electric heater 10 mounted on an upper surface of an oven cavity made of a metal. The heater 10 has a metal container 11, a base 13 housed in the container 11 formed of a compressed microporous heat and/or electrically insulating material, and a radiation electric heating element 14 supported to the base 13. An insulating block 17 is interposed between the cavity 1 and container 11 of the heater 10. The cavity 1 and the container 11 are electrically insulated therebetween by the block 17. Since the container 11 is fixed to the cavity 1 via a pair of the insulating blocks 17, an insulating resistance between the container 11 and the cavity 1 is not reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating / cooking device equipped with a radiant electric heater, such as a microwave oven or an electric oven, and more particularly to improvement of an insulating means of the heating / cooking device equipped with a radiant electric heater.

[0002]

2. Description of the Related Art In a conventional cooking apparatus with a radiant electric heater, such as a microwave oven and an electric oven, as shown in FIG. 15, the radiant electric heater 10 is placed directly on the upper surface of an oven cavity 1 made of a predetermined metal. Has been done. As shown in FIG. 16 and FIG. 17, the radiant electric heater 10 includes a box-shaped metal container 11, a base 13 housed in the metal container 11, and a radiant electric heating element 14 supported by the base 13. It consists of and.

As shown in FIGS. 15 to 17, the metal container 11 is bent and formed in a substantially hat-shaped cross section, and a cover sheet 30 of the same size is fitted and covered on the opened lower surface, and one end wall is formed. The cutout 12 is cut out. A plurality of bending tabs 31 that bend inward are arranged at predetermined intervals in the lower portions of both side walls inside the metal container 11, and the plurality of bending tabs 31 are located at the lower portions of both side walls of the metal container 11. The rod 32 is held. Further, the cover sheet 30 is woven of a fire resistant material,
It is knitted and woven so that it forms a space S with the radiant electric heating element 14.

As shown in FIGS. 16 and 17, the base body 13 is composed of a base portion or base layer formed of a compressed microporous heat and / or electric insulating material, and its peripheral wall is a metal container 1.
It is lower than 1 and higher than the radiant electric heating element 14. The radiant electric heating element 14 is supported on the upper portion of the base body 13 or adjacently. A terminal block 15 is connected to one end of the radiant electric heating element 14, and the terminal block 15 is exposed to the outside through the notch 12 of the metal container 11.

[0005]

The conventional cooking device with a radiant electric heater is constructed as described above, and since the substrate 13 has hygroscopicity / water absorption, it has the following problems. That is, the base body 13 has a good insulating property when dried, but has hygroscopicity / water-absorption property. Therefore, when the base body 13 is left in a high humidity environment for a long time or is exposed to a conductive liquid such as water, Insulation resistance is significantly reduced.

On the other hand, when cooking is performed using the heating cooking device with a radiant electric heater, liquid or vapor may blow out toward the radiant electric heater 10 during cooking.
Further, if the door is left without opening the door after the cooking is completed, the inside of the refrigerator will be filled with steam. Therefore, in the case of the structure in which the radiant electric heater 10 is directly placed on the upper surface of the oven cavity 1 made of metal, the insulation resistance is lowered due to the contact with the liquid or vapor, and there is a risk of electric leakage or electric shock.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a heating cooking device with a radiant electric heater, which can prevent the occurrence of electric leakage and electric shock due to a decrease in insulation resistance.

[0008]

In order to achieve the above object, in the invention according to claim 1, there is provided a radiant electric heater equipped with a radiant electric heater in a metal cavity, which is a radiant electric heater. Is composed of a metal container, a base body formed of compressed microporous heat and / or electrical insulating material and housed in the metal container, and a radiant electric heating element supported by the base body. An insulating block is interposed between the electric heater and the metal container,
The insulating block electrically insulates the cavity from the metal container. In addition, fit the insulating blocks to both ends of the metal container,
An outer box covering the metal container can be attached between the plurality of insulating blocks, and the outer box can be fixed to the cavity.

Further, a heat-resistant and moisture-resistant terminal block exposed from the metal container is connected to one end of the radiant electric heating element, and an insulating block is fitted to the other end of the metal container.
An outer box that covers the metal container can be attached between the insulating block and the terminal block, and the outer box can be fixed to the cavity. Further, the metal container is covered with an outer box fixed to the cavity to form cutouts for insulating blocks in the metal container and the outer box respectively, and a plurality of insulating blocks are interposed between the metal container and the outer box. Then, on the peripheral surface of each insulating block, grooves for the metal container and the outer box are formed at intervals, and the notches of the metal container and the outer box can be fitted into the plurality of grooves.

Further, a heat-resistant and moisture-resistant terminal block exposed from the metal container is connected to one end of the radiant electric heating element, and a plurality of notches are formed in the other end of the metal container to form each notch. Is fitted with an insulating block, the metal container is covered with an outer box fixed to the cavity, one end of which is supported on the peripheral surface of the terminal block, and a cutout is formed at the other end of the outer box. The notch of the box and each insulating block can be fitted together. Further, the metal container is covered with an outer box fixed to the cavity, insulating blocks are respectively interposed between the both ends of the metal container and the outer box, and each insulating block is provided with a protrusion penetrating the metal container. A groove for the outer box is provided on the peripheral surface of the insulating block, and the other end of the outer box can be fitted into this groove through a notch.

Furthermore, the metal container is covered with an outer box fixed to the cavity, and a heat-resistant and moisture-resistant terminal block exposed from the outer box is connected to one end of the radiant electric heating element and the metal container is connected to the metal container. A plurality of insulating blocks are interposed between the other ends of the outer box, one end of the outer box is supported on the peripheral surface of the terminal block, and each insulating block is provided with a protrusion penetrating the metal container. It is also possible to provide a groove for the outer box on the surface and fit the other end of the outer box into this groove via a notch.

Here, examples of the material of the insulating block in the claims include ceramics having excellent heat resistance and moisture resistance, silicone, tetrafluoroethylene resin, Kapton which is polyimide, heat resistant insulating paper (Nomex), and the like. . The heating and cooking device with the radiant electric heater includes at least a microwave oven, an electric oven, and the like.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. A heating and cooking apparatus with a radiant electric heater according to the present embodiment is made of metal as shown in FIGS. 1 to 4. The radiant electric heater 10 placed on the upper surface of the oven cavity 1, a box-shaped metal container 11, a base 13 housed in the metal container 11, and the base 1
3 and a radiant electric heating element 14 supported by 3 and a pair of insulating blocks 17 is interposed between the oven cavity 1 and the metal container 11 of the radiant electric heater 10. 1 and the metal container 11 or the radiant electric heating element 14 are insulated without making electrical contact.

As shown in FIGS. 1 to 3, the metal container 11 is bent and formed in a long and thin cross section and has a notch 12 at one end wall. As shown in the figure, the base body 13 is composed of a base portion or base layer formed of a compressed microporous heat and / or electric insulating material, the peripheral wall of which is lower than that of the metal container 11 and lower than that of the radiant electric heating element 14. Highly formed. Radiant electric heating element 14
Are supported on the top of the base 13 or adjacent thereto. A terminal block 15 for energization is connected to one end of the radiant electric heating element 14, and the insulating terminal block 15 is exposed to the outside in a fitted state in the notch 12 of the metal container 11 via the groove 16. .

As shown in FIGS. 1 to 3, the pair of insulating blocks 17 are fitted to both ends of the metal container 11 and support an outer box 18 which fits and covers the metal container 11. An escape hole for the terminal block 15 is appropriately formed in one of the pair of insulating blocks 17 as necessary. Each insulating block 17 is made of ceramic, silicone, tetrafluoroethylene resin, polyimide Kapton, which has excellent heat resistance and moisture resistance, heat-resistant insulating paper, etc. into a U-shaped section, a box shape, and a bendable sheet. To be done. If necessary, the shape shown in FIG. 4 is formed,
The metal container 11 is fitted in the corners of both ends.

As shown in FIGS. 1 to 3, the outer box 18 is formed in a substantially hat-shaped cross section that is slightly larger than the metal container 11, and in other words, the metal container 11 and the pair of insulating blocks 17 are put together. The entire radiant electric heater 10 is covered from the outside and fixed to the oven cavity 1. This outer box 1
A plurality of fixed tags 19 that bend inward are selectively provided at the lower portions of both end walls of 8, and the plurality of fixed tags 19 fix the radiant electric heater 10 and the pair of insulating blocks 17.

According to the above construction, when the radiant electric heating element 14 is energized in a state where the substrate 13 is insulation-insulated due to humidity or the like, the metal container 11 cannot be said to be in an electrically insulated and safe state. Since it is fixed to the oven cavity 1 via the pair of insulating blocks 17, the insulation resistance with the oven cavity 1 does not decrease. Therefore, it is possible to maintain a safe value of insulation resistance,
There is no risk of electric leakage or electric shock, and the safety of the product can be improved. Also, the assemblability can be improved.

Next, FIGS. 5 to 7 show a second embodiment of the present invention. In this case, an insulating block 17 having a substantially U-shaped cross section is fitted to the other end of the metal container 11. The terminal block 15 is formed of a material having excellent heat resistance and moisture resistance, and another groove 16 is formed on the peripheral surface of the terminal block 15 in addition to the groove 16.
A is cut out in the circumferential direction, and the outer box 1 is placed in this groove 16A.
One end of 8 is fitted and supported through the notch 20, and fitting of the insulating block 17 to one end of the metal container 11 is omitted. Examples of the material of the terminal block 15 include ceramics having excellent heat resistance and moisture resistance, silicone, tetrafluoroethylene resin, Kapton which is polyimide, heat resistant insulating paper, and the like. The other parts are the same as those in the above-described embodiment, and thus the description thereof is omitted.

Also in this embodiment, the same effects as those of the above embodiment can be expected, and moreover, the single insulating block 1 is used.
Since it is sufficient to use No. 7, it is obvious that the number of parts can be reduced and the assembling work can be facilitated, simplified and facilitated.

Next, FIGS. 8 and 9 show a third embodiment of the present invention. In this case, the metal container 11 and the outer box 1 are shown.
A plurality of (3 or 4 or more) insulating blocks 17 having steps are interposed between both ends of the insulating blocks 17. Notches 12 and 20 for the insulating block 17 are formed in the metal container 11 and the outer box 18, respectively. A fixed tag 21 is provided on one of the metal container 11 and the outer box 18.
Is provided and the insulating block 17 is fixed by bending the fixed tag 21. In addition, each block 17
Is formed such that the inner side on the metal container 11 side is low and the outer side on the outer box 18 side is high, and the grooves 22 for the metal container 11 and the outer box 18 are spaced on the inner and outer peripheral surfaces having different heights. The metal container 11 and the notches 12 and 20 of the outer box 18 are fitted into the plurality of grooves 22. The other parts are the same as those in the above-described embodiment, and thus the description thereof is omitted.

In this embodiment, it is obvious that the same effect as that of the above embodiment can be expected and the material cost can be reduced because the insulating block 17 can be reduced in size.

Next, FIG. 10 shows a fourth embodiment of the present invention. In this case, the second and third embodiments are combined. That is, a plurality (two or more) of insulating blocks 17 are fitted to the other end of the metal container 11, the terminal block 15 is formed of a material having excellent heat resistance and moisture resistance, and a groove is formed on the peripheral surface of the terminal block 15. 16A is cut out in the circumferential direction, one end of the outer box 18 is fitted and supported in the groove 16A, and fitting of the insulating block 17 to one end of the metal container 11 is omitted.

The metal container 11 and the outer box 18 are provided with cutouts 12 and 20 for the insulating block 17 respectively at the other ends, and a fixed tag 21 is provided on either one of them. The insulating block 17 is fixed by being bent. Further, each insulating block 17 is formed such that the inner side is low and the outer side is high, and the grooves 22 for the metal container 11 and the outer box 18 are notched at intervals on the inner and outer peripheral surfaces having different heights. The metal container 11 and the outer casing 18 are provided with the notches 1 at the other ends of the grooves 22.
The two and twenty fit together. The other parts are the same as those in the above-described embodiment, and thus the description thereof is omitted.

In this embodiment, the same effects as the above embodiment can be expected, and further, the number of parts can be reduced and the assembling work can be facilitated, simplified, and facilitated as compared with the third embodiment. Is clear. Moreover, since the insulating block 17 can be reduced in size, it is possible to expect a reduction in material cost.

Next, FIGS. 11, 12, 13, and 14 show a fifth embodiment of the present invention. In this case, a plurality (two or more) are provided between both ends of the metal container 11 and the outer box 18. ), The projections 24 penetrating through the through holes 23 of the metal container 11 are provided at the lower inside of each insulating block 17, and the groove 2 for the outer box 18 is provided on the outer peripheral surface of each insulating block 17.
The notch 2 is cut out, and the notch 20 at the other end of the outer box 18 is fitted into the groove 22. Outer box 18
A plurality of fixed tags 25 are selectively provided in the notch 20. In addition, the outer box 18 is provided in the groove 22 of each insulating block 17.
When the notch 20 is fitted, the fixing tag 25 can be bent and fixed. The other parts are the same as those in the above-described embodiment, and thus the description thereof is omitted.

Also in this embodiment, the same effect as the above embodiment can be expected, and since the projection 24 penetrating the metal container 11 is provided on the insulating block 17, the projection 2
It can be positioned and fixed simply by inserting 4. Further, since the fixed tag 25 is unnecessary, workability can be improved and the number of steps of work can be reduced.

Next, referring to FIG. 10, the sixth embodiment of the present invention will be described.
In this case, the fourth and fifth embodiments are combined. That is, a plurality of insulating blocks 1 are provided between the metal container 11 and the other end of the outer box 18.
7, the terminal block 15 is formed of a material having excellent heat resistance and moisture resistance, and a groove 1 different from the groove 16 is formed on the peripheral surface thereof.
6A is cut out in the circumferential direction, one end portion of the outer box 18 is fitted and supported in the groove 16A through the cutout 20, and the through hole 23 of the metal container 11 is penetrated to the lower inside of each insulating block 17. Protrusions 24 are provided so that each insulating block 17
A groove 22 for the outer box 18 is cut out on the outer peripheral surface of the outer box 18, and a notch 20 at the other end of the outer box 18 is fitted into the groove 22. The other parts are the same as those in the above-described embodiment, and thus the description thereof is omitted.

In this embodiment, the same effects as the above embodiment can be expected, and moreover, the number of insulating blocks 17 is reduced, the number of parts is reduced and the assembling work is facilitated, simplified, facilitated, and the material cost is reduced. Can be expected to be reduced.

[0029]

As described above, according to the present invention, there is an effect that it is possible to effectively suppress and prevent the occurrence of electric leakage and electric shock due to a decrease in insulation resistance.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view showing an embodiment of a heating and cooking apparatus with a radiant electric heater according to the present invention.

FIG. 2 is a plan view showing an embodiment of a heating and cooking apparatus with a radiant electric heater according to the present invention.

FIG. 3 is a main part explanatory view showing an embodiment of a heating and cooking apparatus with a radiant electric heater according to the present invention.

FIG. 4 is a perspective view showing another insulating block in the embodiment of the heating cooking device with the radiant electric heater according to the present invention.

FIG. 5 is a cross-sectional explanatory view showing a second embodiment of a heating and cooking apparatus with a radiant electric heater according to the present invention.

FIG. 6 is an explanatory plan view showing a second embodiment of a heating and cooking apparatus with a radiant electric heater according to the present invention.

FIG. 7 is a main part explanatory view showing a second embodiment of a heating and cooking apparatus with a radiant electric heater according to the present invention.

FIG. 8 is an explanatory cross-sectional view of a main part showing a third embodiment of a heating and cooking device with a radiant electric heater according to the present invention.

FIG. 9 is an explanatory plan view showing a third embodiment of a heating and cooking apparatus with a radiant electric heater according to the present invention.

FIG. 10 is a cross-sectional plan view showing a fourth embodiment of a heating and cooking apparatus with a radiant electric heater according to the present invention.

FIG. 11 is a cross-sectional plan view showing a fifth embodiment of a heating and cooking apparatus with a radiant electric heater according to the present invention.

FIG. 12 is an explanatory view showing a fifth embodiment of a heating and cooking apparatus with a radiant electric heater according to the present invention.

FIG. 13 is an explanatory diagram showing a fifth embodiment of a heating and cooking apparatus with a radiant electric heater according to the present invention.

FIG. 14 is an explanatory cross-sectional view of a main part showing a fifth embodiment of a heating and cooking device with a radiant electric heater according to the present invention.

FIG. 15 is an overall perspective view showing a conventional cooking device with a radiant electric heater.

FIG. 16 is an explanatory cross-sectional view showing a conventional cooking device with a radiant electric heater.

FIG. 17 is a plan view of FIG.

[Explanation of symbols]

1 Oven cavity (cavity) 10 Radiant electric heater 11 metal containers 12 notches 13 Base 14 Radiant electric heating element 15 terminal block 16 grooves 16A groove 17 Insulation block 18 outer box 20 notches 22 groove 24 protrusions

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shinya Ueda             22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka             Inside the company F term (reference) 3K092 PP01 QA01 QB24 QB34 VV06                 3L086 AA02 BD02 DA01 DA18                 3L087 AA01 CB02 CC02 DA17 DA26                       DA30

Claims (7)

[Claims] 1. A cooking apparatus with a radiant electric heater, wherein a radiant electric heater is provided in a metal cavity, wherein the radiant electric heater is formed of a metal container and a compressed microporous heat and / or electric insulating material. It is composed of a base body that is housed in a metal container and a radiant electric heating element supported by the base body, and an insulating block is interposed between the cavity and the metal container of the radiant electric heater. A heating and cooking device with a radiant electric heater, characterized in that the metal and the metal container are electrically insulated. 2. An insulating block is fitted to both ends of the metal container, and an outer box covering the metal container is attached between the plurality of insulating blocks, and the outer box is fixed to the cavity. Cooking equipment with radiant electric heater. 3. A radiant electric heating element is connected to one end of a heat-resistant and moisture-resistant terminal block exposed from a metal container, and the other end of the metal container is fitted with an insulating block. The heating cooking device with a radiant electric heater according to claim 1, wherein an outer box for covering the metal container is attached between the two and the outer box is fixed to the cavity. 4. A metal container is covered with an outer box fixed to a cavity, and notches for insulating blocks are formed in the metal container and the outer box, respectively, and a plurality of insulations are provided between the metal container and the outer box. Grooves for the metal container and the outer box are formed at intervals on the peripheral surface of each insulating block with the block interposed, and the notches of the metal container and the outer box are fitted in the grooves. The cooking apparatus with a radiant electric heater according to claim 1. 5. A heat-resistant and moisture-resistant terminal block exposed from a metal container is connected to one end of the radiant electric heating element, and a plurality of cutouts are formed in the other end of the metal container to form each cutout. Is fitted with an insulating block, the metal container is covered with an outer box fixed to the cavity, one end of which is supported on the peripheral surface of the terminal block, and a cutout is formed at the other end of the outer box. The cooking device with a radiant electric heater according to claim 1, wherein the notch of the box and each insulating block are fitted together. 6. A metal container is covered with an outer box fixed to a cavity, insulating blocks are respectively interposed between the metal container and both ends of the outer box, and each insulating block is provided with a protrusion penetrating the metal container. A heating cooker with a radiant electric heater according to claim 1, wherein a groove for an outer box is provided on the peripheral surface of each insulating block, and the other end of the outer box is fitted into this groove through a notch. . 7. A metal container is covered with an outer box fixed to a cavity, and a heat-resistant and moisture-resistant terminal block exposed from the outer box is connected to one end of the radiant electric heating element, and the metal container and the outer case are connected together. A plurality of insulating blocks are interposed between the other ends of the box, one end of the outer box is supported on the peripheral surface of the terminal block, and each insulating block is provided with a protrusion penetrating the metal container. The heating cooker with a radiant electric heater according to claim 1, wherein a groove for an outer box is provided in the outer box, and the other end of the outer box is fitted into the groove through a notch.