JP3282906B2 - Heating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating apparatus for cooking baked and stir-fried foods on a high-temperature flat plate using a commercial cooker or the like.

[0002]

2. Description of the Related Art Conventionally, a heating apparatus of this type heats a thick flat metal plate with a gas flame or a sheathed heater, and directly mounts food thereon to perform grilling and the like. For example, for home use, a sheet heater is provided on the lower surface of a metal plate as shown in Japanese Patent Application Laid-Open No. 2-106686, but for business use, a thick metal plate may be used.

[0003]

In the conventional heating by burning gas, exhaust gas is exhausted to the outside, so that a large exhaust equipment is required. Further, since a large amount of air is consumed to burn the gas, it is necessary to introduce the air from the outside. Therefore, there is a problem that the equipment becomes large. Further, in the case of the combustion heating method using gas, a large amount of heat is released together with the exhaust gas when the exhaust gas is released to the outside.

[0004] Further, in both gas combustion and electric heating, since the metal plate is a thick plate, the weight is heavy and large, and there is a problem that a lot of time is required for the work to remove the scorch after cooking. .

[0005] For example, as disclosed in Japanese Patent Publication No. 4-10716, a lamp heater having a reflection function and emitting infrared radiation upward above a glass ceramic layer is arranged as disclosed in Japanese Patent Publication No. 4-10716. There are problems such as variations in surface temperature and low thermal efficiency.

In view of this, the use of electricity for heating eliminates the need for air supply / exhaust equipment and simplifies the equipment. The heater is mounted as a wide area planar heater on the entire lower surface of the heating plate to prevent thermal deformation. By pressing against the bottom with a certain force with the holding plate, uniform temperature is ensured and high thermal efficiency is secured, and crystallized glass and ceramic plate are closely attached on the heating flat plate, so that the cooked food is scorched. It is intended to simplify the cleaning work at least.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a planar heater for uniformly heating the entire lower surface on the lower surface of a heating plate made of a good conductor such as metal having a large area. In a heating device equipped with a rectangular heater, a strip-shaped heater pressing plate divided into a fraction of the entire area of the planar heater is arranged below the planar heater, and the heater pressing plate is provided with a heater for the planar heater. A plurality of bolts are provided on the lower surface of the heating plate so as to cover the entire area, and a bolt fixed to the lower surface of the heating plate at the center of each heater holding plate and screwed to this bolt
A fixing means consisting of a nut to be
Of the heater, and the outer edge of the heater holding plate.
A supporting part fixed to the lower surface of the heating plate at a plurality of
The spring inserted in the support part of the unit and the lower end of the support part
And a holding means comprising a locking portion for fixing the heater holding plate.
The outer periphery of the lower side of the heating flat plate by the repulsive force of the spring
A heat plate made of crystallized glass or a ceramic plate or the like having a low thermal conductivity and a good cleaning property is closely mounted on the heating flat plate, and the long sides of both sides of the heater pressing plate are further provided. This is to improve the strength of the bending and heater holding plate.

[0008]

With the above construction, the planar heater mounted on the entire lower surface of the heating plate made of a good conductor such as a metal having a large area uniformly heats the entire lower surface of the heating plate having good heat conductivity.
The heater holding plate, which is divided into strips and is arranged so as to cover the entire lower area of the sheet heater, presses the sheet heater against the entire lower surface of the heating plate, and the fixing means provided at the center portion of the heater holding plate respectively The central part of the heater holding plate is fixedly fixed to the lower surface of the heating flat plate, and a spring interposed between the holding means provided at a plurality of outer peripheral end portions is provided between the lower surface of the heating flat plate and the heater holding plate. Is pressed slidably and held slidably. Thus, the planar heater is constantly pressed against the entire lower surface of the heating plate with a constant force, and thermal expansion at the time of temperature rise is easily absorbed to prevent thermal deformation, so that the entire lower surface of the heating plate has a uniform temperature.

A heat plate made of crystallized glass, ceramic plate, or the like, which is closely mounted on a heating flat plate having good heat conduction and a uniform temperature over the entire surface, can be cooked at a uniform temperature, has a low heat conductivity, and has little burning. Improves cleanability. The strength of the heater holding plate is improved by bending the long sides of both sides.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a heating device showing an embodiment of the present invention, and FIG. 2 is a bottom view thereof. Fig. 3 is a sectional view
is there.

In FIG. 1, reference numeral 1 denotes a heating plate made of metal having a large bottom area, and reference numeral 2 denotes a crystallized glass or ceramic plate which has a small thermal conductivity and is easy to clean and which is provided in close contact with the upper surface of the heating plate 1. A heat plate,
Reference numeral 3 denotes a planar heater mounted on the lower surface 4 of the heating plate 1. An upper surface insulating material 5a is provided on the upper surface of the planar heater 3, and a lower surface insulating material 5b is provided on the lower surface.

Reference numeral 6 denotes a planar heater 3 below the lower surface insulating material 5b.
1/3 of the area of the planar heater 3 mounted to cover all
This is a plurality of heater pressing plates formed in a rectangular shape having a size of 1/5. The heater holding plate 6 is bent at both end surfaces in the longitudinal direction to increase the strength. Heater holding plate 6
Presses the sheet heater 3 strongly against the lower surface 4 of the heating plate 1,
In addition, to prevent deformation due to local heating, a tough material having good thermal conductivity is used.

Reference numeral 7 denotes fixing means for fixing the heater pressing plate 6 to the lower surface 4 of the heating flat plate 1. In this embodiment , the fixing means 7 is provided on the lower surface 4.
The bolt 7a is fixed by welding, and the bolt 7a is
The heater 3 and the heater holding plate 6 are penetrated, and the washer 7
c by tightening it with the nut 7b.
The heater 3 is pressed and fixed to the lower surface 4 of the heating plate 1.
It has become. That is, the center of the heater pressing plate 6 is fixed to the lower surface 4 of the heating flat plate 1 by the fixing means 7. Numeral 8 denotes holding means for holding the outer peripheral end surface and the lower surface 4 of the heater pressing plate 6 via a spring 9, and a stepped portion serving as a support portion.
Bolt 8a is fixed to the lower surface 4 by welding.
The sheet heater 3 and the heater holding plate 6 penetrate the bolt 8a.
In this state, insert the spring 9 and remove the washer 8c.
Is fastened and attached with a nut 8b which is a locking portion
ing. At this time, even if the nut 8b is tightened, a stepped bolt
Since only the step portion of 8a is tightened,
The heater 3 and the heater holding plate 6 are lowered by the repulsive force of the spring 9.
It is pressed against the surface 1 side. Therefore, the planar heater 3
The data holding plate 6 is attached to the stepped bolt 8a of the holding means 8.
And is slidably held. Reference numeral 10 denotes a power supply to be supplied to the planar heater 3, reference numeral 11 denotes a control device that controls power supply to the planar heater 3 to control the temperature of the heating flat plate 1, and 12 detects the temperature of the heating flat plate 1. It is a temperature sensor.

Next, the operation of this embodiment having the above configuration will be described.

When power is supplied from the power supply 10 to the sheet heater 3 mounted on the heating plate 1 and the sheet heater 3 generates heat, the heat is transmitted to the lower surface 4 of the heating plate 1 via the sheet heater 3 and the upper surface insulating material 5a. Conducted. When energization of the planar heater 3 is continued and the temperature of the heating flat plate 1 reaches a predetermined temperature, the temperature sensor 12 detects this and sends a signal to the control device 11,
Here, the energization of the planar heater 3 is stopped. By the above operation, the temperature of the heating flat plate 1 is maintained at a predetermined temperature.

On the other hand, when the lower surface 4 of the heating flat plate 1 is heated, the heating flat plate 1 made of metal having a high thermal conductivity rises at a common temperature. Therefore, the heating plate 2 on the heating plate 1 has a uniform temperature over the entire surface of the heating plate 1 thereunder.
The heat plate 2 on the heating plate 1 is also made uniform in temperature on the heating surface, so that cooking can be performed efficiently on the heat plate 2.

When foods and the like are directly placed on the heat plate 2 and cooked such as grilled, fried or steamed, heat on the surface of the heat plate 2 is transferred to the foods and the like placed on the heat plate 2. As a result, the temperature of the heat plate 2 below the food decreases, but if the heat plate is a metal plate, the temperature can be easily recovered, and the food is supplied with heat. Burns on the surface.
If the surface is scorched, the heat conductivity of this part is reduced, so that it is difficult for heat to enter the center of the food.

However, the heat conductivity of a crystallized glass or ceramic plate is several tenths of that of a metal plate or the like. It takes a long time to recover gradually, so that heat does not enter the food material excessively, the food surface is not scorched, and the cooking property is good. In addition, the cleaning property is improved because there is little burning.

When the temperature of the heating plate 1 rises, the object expands due to thermal expansion. The heat of the heating plate 1 is transferred to the heat plate 2. However, since the crystallized glass or the ceramic plate has a small thermal conductivity, the heat transfer to the heat plate 2 made of the crystallized glass or the ceramic plate is small.

Further, the heater presser plate 6, which is located below the lower surface insulating material 5b and presses the sheet heater 3 upward, has a high temperature where it is in close contact with the heat-generating part of the sheet heater 3 such as a central fixed part. Therefore, the temperature rise is small in places such as the end faces that are not separated from the heat generating portion.

Heat is transferred from the high-temperature portion to the low-temperature portion by heat conduction in the heater holding plate 6, but usually, a material having high strength and toughness is used for this type of heater holding plate 6, and such a material is used. Has a low thermal conductivity, so the temperature difference between the high-temperature part and the low-temperature part increases. Accordingly, the heater holding plate 6 is likely to be deformed because the central fixing portion where the temperature becomes high expands and the end face does not extend. As a measure to prevent this deformation, the heater pressing plate 6 is divided into strips each having a size of 1/3 to 1/5 of the entire area of the planar heater 3, so that the temperature variation among the heater pressing plates 6 can be reduced. Although this occurs, thermal deformation is reduced by reducing the temperature difference in one heater pressing plate 6.

Further, in order to make the temperature of the heater holding plate 6 uniform, a tough material and a material having high thermal conductivity are press-bonded, for example, a stainless steel and aluminum clad material is used. The difference can be reduced and deformation due to thermal expansion is reduced. Also,
The holding means 8 includes an outer peripheral end face of the heater holding plate 6 and the heating flat plate 1.
The lower surface 4 of the holding via a spring 9, because the heater pressing plate 6 is freely stepped bolt 8a and sliding, when there is a temperature rise extends longitudinally tangent to the time the heater
Pressing the spring 9 because it is more stretched
This deformation is absorbed by the spring 9
It can be collected.

[0023]

As described above, by adopting the structure of the present invention, a wide-area planar heater is mounted on the lower front surface of the heating plate, and the glass heater or the ceramic plate is placed on the heating plate having good heat conductivity. Since the heat plate is provided in close contact, the temperature of the heating surface can be made uniform, cooking can be efficiently performed on the heat plate, and there is little scorching, so that cleaning is easy, and one-third of the total area of the sheet heater. ~ 1
Since it is divided into strips each having a size of / 5, the temperature is made uniform and deformation due to thermal expansion is small, and the heater holding plate is fixed and fixed at the central portion by fixing means, and the outer periphery is fixed by holding means. The end face is slidably held via a spring, etc., and the heater holding plate has the long sides on both sides bent to improve the strength, so that the entire surface of the sheet heater is pressed against the bottom surface of the heating plate and heat transfer is improved. When the heater holding plate expands due to thermal expansion, it expands freely without being fixed.Therefore, deformation due to distortion is reduced, preventing the heater holding plate from being deformed due to distortion, improving the adhesion of the heater, This ensures high thermal efficiency without a decrease in heat transfer.

Since the heating is carried out by electricity, there is no generation of exhaust gas as in the case of heating by burning a gas, so that a large-scale exhaust facility or the like is not required, and the apparatus can be simplified. Further, higher thermal efficiency can be obtained as compared with the combustion heating method using gas.

[Brief description of the drawings]

FIG. 1 is a sectional view of a heating device according to an embodiment of the present invention.

FIG. 2 is a bottom view of the same.

FIG. 3 is a sectional view of the main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heating plate 2 Heat plate 3 Planar heater 6 Heater holding plate 7 Fixing means 8 Holding means 9 Spring

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 61-190921 (JP, U) Japanese Utility Model Sho 56-35319 (JP, U) Japanese Utility Model Sho 51-102367 (JP, U) Japanese Utility Model Sho 56- 109292 (JP, U) Shokai Sho 56-128127 (JP, U) Shokai Sho 63-196594 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 37/06 321

Claims (1)

(57) [Claims] 1. A heating apparatus in which a flat heater (3) for uniformly heating the entire lower surface is mounted on a lower surface of a heating plate (1) made of a good conductor such as a metal having a large area. On the lower side, a strip-shaped heater pressing plate (6) divided into a fraction of the whole area of the planar heater (3) is arranged.
A plurality of the heater pressing plates (6) are provided on the lower surface of the heating flat plate (1) so as to cover the entire area of the planar heater (3), and the heating flat plate (1) is provided at the center of each heater pressing plate (6). ) And a bolt (7a) fixed to the lower surface of
A fixed hand consisting of a nut (7b) screwed to (7a)
Step (7) is provided, and the center of the heater holding plate (6) is fixed.
And a plurality of outer peripheral end faces of the heater holding plate (6).
A support part (8a) fixed to the lower surface of the heating flat plate (1)
And a spring (9) inserted into the support (8a).
And a locking portion (8a) for locking to a lower end side of the support portion (8a).
And holding means (8) comprising:
The outer periphery of (6) is heated by the repulsive force of the spring (9).
There is no pressing and holding structure against the lower surface of the flat plate (1).
Further, a heat plate (2) made of crystallized glass or ceramic plate or the like having a low thermal conductivity and good cleaning properties is provided on the heating plate (1) in close contact with the heating plate (1). A heating device characterized in that the sides are bent to increase the strength of the heater holding plate (6).