JPH0225344Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an electric warming tray for placing cooked food and keeping it warm.

BACKGROUND ART In general, it is desirable for this type of electric heat-retaining tray to be thin as a whole from the viewpoint of usability, and from the viewpoint of manufacturing, it is desired that it be easy to assemble.

By the way, the conventional electric heating tray had a structure as shown in Figure 6. That is, a heat insulating plate 4 provided on the upper surface of the vessel body 1 is heated by a wire-wound heater 5 attached to the lower surface thereof, and a plurality of pressing members 6 are arranged between the heater 5 and the bottom plate 2, It was crimped to the heater 5 and heat insulating plate 4. Further, a part of the pressing member was processed and a temperature control element 7 was attached thereto. (For example, Japanese Utility Model Application Publication No. 58-70182) In such a conventional configuration, the temperature control element 7 is provided between the heat insulating plate 4 and the bottom plate 2 via the pressing member 6, making it difficult to stack the main body. The thickness increases and the number of component parts increases, which is undesirable from the viewpoint of parts management and assembly. And the heater 5 is the insulation plate 4
Because of this pressure, thermal conductivity is poor due to mounting variations (gap management), and variations in heat retention performance, which is the quality of the product, become large. Furthermore, since the heater 5 is a mica type, the size of the heater 5 is limited, and it is not possible to arrange the heater 5 so that it is distributed to every corner of the heat insulating plate 4, and the temperature distribution is poor in every corner of the heat insulating plate 4. Become.

For this reason, electric heat-retaining trays have been developed in which a heating element is transferred to a heat-retaining plate.

Problems that the invention aims to solve In order to satisfy the aesthetic sense, this electric heat-insulating tray uses a transparent heat-resistant glass heat-insulating plate and has a heating element transferred to the back of the plate, but it is difficult to attach a temperature control element to it. For example, the temperature control element is visible from the outside, spoiling the appearance, and making it impossible to supply a high-quality electric heating tray. On the other hand, stable heat retention performance cannot be obtained without the use of a temperature control element, and if a high-wattage heating element is used, the surface temperature of the heat retention plate will rise excessively, and if water is accidentally splashed on it, the heat shock will There is a problem when the heat insulating plate made of heat-resistant glass breaks.

The present invention solves these problems, and aims to provide an electric heat-insulating tray in which the temperature control element is not visible from above the heat-insulating plate, and is thin and easy to assemble.

Means for Solving the Problem In order to solve this problem, the present invention consists of a transparent heat insulating plate made of heat-resistant glass or the like with a heating element on the back side, and a fixed gap placed below the heat insulating plate. A substantially U-shaped fixing plate that inserts a cut-back piece into the gap between the heat-insulating plate and the back plate and fixes the heat-insulating plate and the back plate at the edges, and is attached to the cut-back piece of the fixing plate. a temperature control element;
The present invention is characterized in that it is comprised of an outer frame that is assembled to cover the temperature control element and the fixed plate from the outside.

Function With this configuration, by using a substantially U-shaped fixing plate to connect the heat insulating plate made of transparent heat-resistant glass having a heating element on the back side and the back plate, the heat insulating plate can be attached by simply providing a gap in which the temperature control element can be inserted. , the back plate and temperature control element can be fixed, and a thinner structure can be achieved compared to the conventional stacking type using mica heaters. In addition, the temperature control element is attached directly to the cut-back part of the fixed plate, and the temperature control element inserted into the gap between the heat insulating plate and the back plate is securely positioned by the fixed plate, eliminating variations in position. Since a temperature control element can be installed, accurate temperature control is possible.

Furthermore, since the fixed plate and temperature control element are covered by the outer frame, which is a handle, from the outside of the heat retention plate and back plate, the fixed plate and temperature control element are not visible from the outside, so there is no aesthetic problem, and the electric heat retention is stylish. It is possible to supply trays.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings. In Figures 1 to 4, reference numeral 12 denotes a heat insulating plate made of transparent heat-resistant glass, on the back of which a heating element 13 is provided by means such as transfer, and at the end, power is supplied to the heating element 13. Heating element terminal 1
3a is provided. Below the heat insulating plate 12, a transparent back plate 14 made of heat-resistant glass is placed opposite to the heat insulating plate 12 with a gap provided by a sash 18. Note that a picture pattern is applied to the surface of this back plate 14. The heat insulating plate 12 and the back plate 14 are fixed by a substantially U-shaped fixing plate 16 that is press-fitted to the ends thereof, and a temperature control element 1 is disposed in a part of the fixing plate 16 so as to be located in the gap.
7 is attached. An outer frame 11 having the above-mentioned gap forming sash 18 is fitted to the outer edges of the heat retaining plate 12 and the back plate 14.

The heating element 13 is made of a transparent material such as tin oxide, and is coated over a wide area on the back surface of the heat insulating plate 12 made of transparent heat-resistant glass.

Further, the back plate 14 may be a metal plate or a ceramic plate with a pattern on its surface.

Next, the temperature control element 17 is attached as shown in FIG. In other words, the fixing plate 1 is approximately U-shaped.
Cut back piece 20 so that it protrudes inward to the middle piece of 6.
An insulating plate 21 is provided at the tip of this cut piece 20.
The temperature control element 17 is attached to the insulating plate 21, and the U-shaped fixing plate 16 is fitted to the ends of the heat insulating plate 12 and the back plate 14, which face each other with the sash 18 in between. Fix it using the elasticity of No. 16. Further, the temperature control element 17 attached to the cut-back piece 20 provided on the fixed plate 16 is fixed so as to extend at least under the heating element 13. The outer frame 11, which is a handle, covers the fixed plate 16, the turned portion 20, and the temperature control element 17 from the outer surface of the heat insulating plate 12 and the back plate 14, and is structured so that they are not visible from the outer surface at least when completed.

With this configuration, the temperature can be controlled by simply providing a gap between the heat insulating plate 12 made of transparent heat-resistant glass with the heating element 13 on the back side and the back plate 14 using the substantially U-shaped fixing plate 16. A location for placing the element 17 can be obtained, and a thinner configuration can be achieved than in a stacked type using conventional mica type heaters. In addition, in order to directly attach the temperature control element 17 to the cut-back portion 20 of the fixed plate 16, the heat insulating plate 12
When the temperature control element 17 is inserted into the gap between and the back plate 14 and fixedly held by the fixing plate 16, the temperature control element 17 is reliably positioned by the fixing plate 16, so there is no variation in the position of the temperature control element 17. In addition, since the temperature control element 17 is located at least directly below the heating element 13, the temperature control element 17 can be installed near the heating element 13, so that accurate temperature control is possible.

As shown in FIG. 3, the heating element 13 is uniformly coated over a wide range on the back surface of the heat insulating plate 12 made of transparent heat-resistant glass, so the temperature distribution on the surface of the heating element 13 is almost constant. This has been experimentally confirmed (graph in Figure 3), and as a result, the temperature at the center of the heat insulating plate 12 and the temperature at the end of the heating element 13 become approximately equal, and as a result, the temperature at the center of the heat insulating plate 12 becomes approximately equal. It will control the temperature. In addition, the cut-back portion 2 of the fixed plate 16
Since the temperature control element 17 is directly attached to the 0, there are fewer components, and when assembled, the heat insulating plate 12 and the back plate 1
4 can be temporarily fixed, and assembly is easy.
Compared to the conventional method of fixing a mica-type heater using a pressing member, the number of parts is reduced, parts management is simplified, and inexpensive products can be supplied. Furthermore, the outer frame 11 which is a handle has a fixed plate 16,
Since the cut-back portion 20 and the temperature control element 17 are covered and hidden from the outer surfaces of the heat insulating plate 12 and the back plate 14, the fixed plate 16 and the temperature control element 17 are not visible from the outside, and there is no problem in terms of aesthetics.

Although the above embodiment shows an example of air sensing in which the temperature control element 17 is provided with a gap between the heat insulating plate 12 and the heat insulating plate 12, as shown in FIG. This enables more stable temperature control, and since the temperature control element 17 is securely fixed during transportation of the product,
Eliminating abnormal noise from the temperature control element 17 and damage caused by shock can solve quality problems.

If the temperature control element 17 is adopted in an electric heat-retaining tray that uses a heat-retaining plate 12 made of transparent heat-resistant glass with a heating element 13 transferred to the back surface 14, stable heat-retaining performance can be obtained and the overtemperature of the heat-retaining plate 12 will rise. This eliminates safety problems such as the fact that the heat insulating plate 12 will not be damaged even if the heat insulating plate 12 is accidentally splashed with water or the like and cooled down rapidly during actual use.

Furthermore, since the picture pattern 15 is transferred to the back plate 14 made of transparent heat-resistant glass, it is possible to supply high-quality products that meet the needs of consumers, which have become increasingly diverse in recent years.

Effects of the invention As is clear from the above embodiments, the electric heat-insulating tray of the present invention uses a substantially U-shaped fixing plate to connect the heat-insulating plate and the back plate, and creates a gap between the cut-away part of the fixing plate and the temperature control element. It can be fixed just by installing it, making it more compact than the conventional stacking type using mica heaters.The temperature control element can be mounted directly on the cut-back part of the fixing plate, and the temperature can be adjusted in the gap between the heat insulation plate and the back plate. When the control element is inserted and fixed and held by the fixing plate, the temperature control element is reliably positioned by the fixing plate, eliminating variations in the position of the temperature control element, and also making it possible to install the temperature control element near the heating element. Because you can
Accurate temperature control becomes possible. In addition, since the temperature control element is mounted directly on the cut-back part of the fixing plate, there are fewer components, and when assembling, the heat insulating plate and back plate can be temporarily fixed with the fixing plate, making assembly easier. Compared to a method in which a type heater is fixed using a pressing member, the number of parts is reduced, parts management is simplified, and cheaper products can be supplied. Furthermore, since the fixing plate and temperature control element are covered from the outside of the heat retention plate and back plate by the outer frame that is the handle, the fixation plate and temperature control element are not visible from the outside and are aesthetically pleasing. can be supplied.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of an electric heat-insulating tray showing an embodiment of the present invention, Fig. 2 is an enlarged view of the main parts showing the installation state of the temperature control element of the electric heat-insulating tray, and Fig. 3 is a cross-sectional view of the electric heat-insulating tray showing an installation state of the temperature control element of the electric heat-insulating tray. 4 is an overall perspective view of the electric heat-insulating tray, FIG. 5 is a sectional view of an electric heat-insulating tray showing another embodiment, and FIG. 6 is a cross-sectional view of a conventional electric heat-insulating tray. It is a diagram. 11... Outer frame (handle), 12... Heat retention plate,
13...Heating element, 14...Back plate, 15...Picture pattern, 16...Fixing plate, 17...Temperature control element, 2
0...Cut back part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A transparent heat-insulating plate made of heat-resistant glass or the like with a heating element provided on the back side, a back plate disposed with a certain gap below the heat-insulating plate, and the above-mentioned heat-insulating plate. Insert the cut piece into the gap between the plate and the back plate,
and a substantially U-shaped fixing plate that fixes the heat insulating plate and the back plate at the edges, a temperature control element attached to the cut-back piece of the fixing plate, and a built-in structure that covers the temperature control element and the fixing plate from the outside. An electric heat-retaining tray consisting of an outer frame and an outer frame. (2) The electric heat-insulating tray according to item 1 of the utility model registration claim, wherein the temperature control element is press-fitted and incorporated into the back surface of the heat-insulating plate near the heating element by utilizing the elastic effect of the cut-back piece of the fixing plate. (3) The electric heat-retaining tray according to item 1 of the utility model registration claim, wherein the back plate has a picture pattern, characters, or symbol on its surface and is arranged with a certain gap below the heat-retaining plate.