JP2001353078A - Heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a reliable heating device by eliminating the temperature difference of food to be cooked due to the difference in a heating plate. SOLUTION: This heating device consists of an upper case 9 and a lower case 10, heating plates 11 and 12 are mounted to the upper case 9, heaters 13 and 14 are mounted to the inner-surface side of the heating plates 11 and 12 and temperature sensors 15 and 16 are mounted to the central part of the heaters 13 and 14, a control means 17 for controlling the heaters 13 and 14 according to the output of the temperature sensors 15 and 16 is provided, and further the surfaces of the heating plates 11 and 12 are rounded in a projecting or recessed, spherical shape, and a plane part is provided at an outer-periphery part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a heating device for heating dishes (containers) containing cooked foods with a heater.

[0002]

2. Description of the Related Art Most of catering catering trucks which have been conventionally used for hospital meals, etc., did not have a heating and heating function. This is because, depending on the contents of the meal, there is a mixture of foods that should be kept warm and heating and those that should not be kept warm. For example, in the case of supplying food to one patient, cooked products placed on one tray include those that require heat retention and those that do not require heat retention. In addition, it is not necessary or necessary to keep warm even when the menu changes, so it is difficult to keep warm even though it is placed on the catering car. In addition, even if a single catering car is viewed, there are cases in which meals for a number of patients are placed and cooking may be different depending on the patient. Therefore, it is not necessary or necessary to heat and heat each tray.

[0003] Further, in facilities with a large number of patients or residents, a large amount of meals are prepared, so that cooking is performed at a time considerably earlier than the time for serving meals and finished sequentially, so that cooked items are served on tableware. It is left in a state where it is placed on a catering car. As a result, foods to be eaten in a warm state often become cold, and hospital meals generally lacked in taste.

In recent years, hospitals, nursing homes, nursing homes, and other facilities that provide a large amount of lunch have been in compliance with HACCP in order to prevent food poisoning and hospital infections. In order to prevent the propagation of various germs, items that have been left for a long time from the end of cooking until they are provided to patients, etc. should be stored in a cart-in refrigerator with the dishes placed on tableware and placed on a serving car. And served to individuals.

[0005] In this method, since all of the dishes are cooled, they cannot be served to individuals as they are. Among the cooked items, those that are suitable for cooling and those that are to be kept at an appropriate temperature are required to be heated for each tableware. As a method of this heating, using a catering car equipped with a low-power electric heater below the tableware that needs to be heated, put it on the tableware and put it on the catering car, and keep it cool in a cart-in refrigerator. In a certain state, the small-power heater is energized several tens of minutes before the meal supply time to heat tableware that needs to be kept warm.

Here, when the tableware to be heated is usually placed on a table, the bottom surface is curved in a concave shape so that the tableware does not rotate, and when this is set on a heating plate,
The bottom of the tableware is in contact with the top surface of the plate, and the tableware is mainly heated by heat conduction due to this contact and radiant heat from the heating plate.

[0007] The heating plate is heated by energizing the heater. At this time, the surface to which the heater is attached is rapidly heated, and the heating plate is adhered to the case to attach the heater. The outer circumference of the heating plate is not easily heated.

[0008] Here, the heating plate expands when heated at the central portion, but the outer peripheral circle portion is not heated so much and the expansion is small, so that the surface of the heating plate is concavely or convexly warped in a drum shape.

Then, depending on whether it is concave or convex,
The temperature of the heating plate at the portion detected by the temperature sensor differs. This is because the central part of the heating plate contacts the tableware if it warps convexly, and does not touch the tableware if it warps concavely. As a result, the temperature of the food inside the tableware varies depending on the heating plate. This causes a problem that, for example, a fish set on a heating plate having a high electric conductivity has a burnt contact surface with tableware.

Therefore, the amount of adhesion of the heating plate to the case is reduced to reduce the area of the portion that is not heated, the material of the heating plate is made of aluminum or the like having high thermal conductivity, or the size of the heating plate is reduced. The warpage was reduced as much as possible by reducing the size.

[0011]

In such a conventional technique, there is a problem of poor workability in bonding to a case due to a reduction in the amount of bonding, and reliability of watertightness due to a reduction in the area of a bonding portion. Also, there is a limit in reducing the area of the heating plate because it is determined by the tableware, and there is a problem that the surface of the heating plate is easily damaged by using aluminum as the material. In any case, even if the warpage can be reduced, it cannot be reduced to zero, so that there is a problem that the temperature of the cooked food inside the tableware varies to a considerable extent.

[0012]

According to the present invention, in order to solve such a problem in the future, the surface of the heating plate is concavely or convexly provided with a spherical R so that the warping direction is always restricted to one of the directions. Things.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention comprises an upper case and a lower case. A heating plate is mounted on the case, and a heater and a temperature sensor are mounted on the inner side of the heating plate. A heating device comprising a control means for controlling a heater in accordance with an output of a temperature sensor, and further comprising a concave or convex spherical R surface on the heating plate surface and a flat portion provided on an outer peripheral portion. is there.

According to such a configuration, when the heating plate is heated by being energized by the heater, the warping direction of the heating plate can always be regulated to one side, so that the portion detected by the temperature sensor is heated. This prevents the temperature of the plate from being different.
Therefore, there is almost no difference in the duty ratio of the heater due to the difference between the heating plates, and the temperature of the food inside the tableware can be almost eliminated by the heating plate. From this, the temperature difference of the cooked food due to the difference of the heating plate is almost eliminated, and the stable cooking is achieved without deteriorating the quality of the product such as the reliability of the adhesion of the heating plate to the case and the surface of the heating plate being easily scratched. It is possible to provide a highly reliable heating device capable of supplying articles.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a top view of tableware placed on a feeding tray, and FIG. 2 is a cross-sectional view of a main part of a heating device including a cross-sectional view taken along line AA of FIG. FIG. 3 is a detailed cross-sectional view of tableware and a heating device, and FIG. 4 is a schematic structural diagram of a food service catering vehicle equipped with the heating device of the present invention.

In FIG. 1, reference numeral 1 denotes a tray for placing tableware and the like on each person at the time of lunch in a hospital or a nursing home.
2, 3, 4, 5, 6, and 7 are dishes for holding cooked foods,
Among them, the dishes 2 and 3 are heat-resistant containers, into which cooked items requiring heating are put, and those not requiring heating are put on other dishes 4, 5, 6, and 7. The tray 1 below the tableware 2 and 3 is provided with an opening larger than the bottom of the tableware 2 and 3, and the tableware 2 and 3 are set in this opening.

Reference numeral 8 denotes a main body of the heating device, which is provided below the tray 1 and heats the dishes 2 and 3 described above. The main body 8 is formed of a case upper 9 and a case lower 10, and heating plates 11 and 12 are attached to the case upper 9. The tableware 2 is placed on the heating plate 11, and the tableware 3 is placed on the heating plate 12, respectively.

The heating plate 11 and the heating plate 1
2 is formed in a circular shape, its surface is provided with a spherical R having a height of 1 mm or more in a convex shape, and a flat portion is provided on the outer peripheral portion. In this embodiment, the heating plates 11 and 12 have a diameter of 180 mm, a spherical surface having a diameter of 150 mm, and a flat portion having a width of 15 mm (approximately 10% of the spherical surface). It is 1 mm. The provision of the flat portion prevents the spherical surface from being reversely warped during heating. Therefore, the heating plates 11 and 12 are designed so that they always warp when heated.

The heating plate 11 and the heating plate 1
2 has a heater 13 and a heater 14 attached to its inner surface, respectively. Temperature sensors 15 and 16 are provided at the center of the heater 13 and heater 14 mounting surfaces, respectively.
Is attached, temperature sensor 15, temperature sensor 16
The control means 17 for controlling the heaters 13 and 14 from the output of the main body 8 is provided inside the main body 8.

Further, a rib 18 is provided on the upper case 9 so as to surround the entire circumference of each of the heaters 13 and 14, and the rib 18 is brought closer to the lower case 10 to such an extent that no problem occurs in assembly. It is. In this embodiment, the rib 18 is provided on the upper case 9, but the lower rib 10 is provided on the lower case 10.
May be provided upward, or may be provided on both the upper case 9 and the lower case 10.

In FIG. 4, reference numeral 20 denotes a serving truck, in which a large number of heating devices are incorporated, and the required number of trays 1 on which dishes 2, 3, and 4 are placed is set. I have. At this time, the ingredients that need heating are tableware 2,
The ingredients that do not need to be heated are placed in other dishes 4 and the like. The dishes 2 and 3 requiring heating are placed in contact with the heating device main body 8.

The serving truck 20 that has been served is carried into the refrigerator compartment as it is and stored at a low temperature. Thereafter, at the time of providing meals, energization is started by a preset timer so that the object to be heated is at an appropriate temperature, and the heaters 13 and 14 in the heating device main body 8 start heating.

When the heating is started, the surface temperature of the heating plates 11 and 12 is controlled by the temperature sensors 15 and 16 inside the main body 8. Heating plate 1 by being heated
1, 12 expand. At this time, since the heating plates 11 and 12 have a convex spherical R, the heating plates 11, 1
Since the warpage due to the thermal expansion of 2 always warps convexly, there is almost no difference due to the duty ratio of the heater between the respective heating plates 11 and 12, so that the surface temperatures of the respective heating plates 11 and 12 can be kept constant. . For this reason, it is possible to heat a wide variety of food materials to a suitable temperature without burning.

At the time of serving meals, the heating is finished and the ingredients are at an appropriate temperature. The serving truck 20 is pulled out of the refrigerator and transported to the front of each room, and the serving truck 20 is conveyed to each individual from there. Served.

[0026]

According to the present invention, when the heating plate is heated by energizing the heater, the warping direction of the heating plate can be restricted to one side without fail.
This prevents the temperature of the heating plate at the portion detected by the temperature sensor from being different. Therefore, there is almost no difference in the duty ratio of the heater due to the difference between the heating plates, and the temperature of the food inside the tableware can be almost eliminated by the heating plate.

From this, it is possible to almost eliminate the temperature difference of the cooked food due to the difference of the heating plate without deteriorating the quality of the product such as the reliability of the adhesion of the heating plate to the case and the surface of the heating plate being easily damaged. It is possible to provide a highly reliable heating device that can supply a stable cooked product.

[Brief description of the drawings]

FIG. 1 shows one embodiment of the present invention, and is a view of tableware placed on a feeding tray as viewed from above.

FIG. 2 is a sectional view of a main part of the heating device including the sectional view taken along the line AA of FIG. 1;

FIG. 3 is a detailed sectional view of a tableware and a heating device.

FIG. 4 is a schematic structural view of a catering and food delivery car equipped with the heating device of the present invention.

[Explanation of symbols]

8: heating device body, 9: above the case, 10: below the case, 1
1, 12: heating plate, 13, 14: heater, 1
5, 16: temperature sensor, 17: control means.

Claims (2)

[Claims] An upper case (9) and a lower case (10), and a heating plate (11) on the upper case (9);
(12) is attached, this heating plate (11),
Heaters (13) and (14) on the inner surface side of (12) and a temperature sensor (1) on the center of heaters (13) and (14).
5) and (16) are attached, and the temperature sensor (1)
5), the heaters (13), (1)
4) a control means (17) for controlling the heating plate (11) and (12), wherein the surfaces of the heating plates (11) and (12) are concave or convex to form a spherical R surface, and a flat portion is provided on the outer peripheral portion. A heating device. 2. The heating apparatus according to claim 1, wherein the height difference between the flat portions of the heating plates (11) and (12) and the spherical R surface is 1 mm or more.