JP3823006B2 - Heating device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a heating device that heats a tableware (container) containing a cooked product with a heater.
[0002]
[Prior art]
Most of the lunch distribution vehicles used for conventional hospital meals did not have a heat-retaining and heating function. This is because, depending on the contents of the meal, there are some things that should be kept warm or those that should not be kept warm. For example, in the case of supplying a meal to a single patient, the cooking products placed on one tray are mixed with those requiring heat insulation heating and those not requiring heat insulation heating. In addition, there is a need for heat insulation heating depending on changes in the menu, so although it is on the trolley car, heat insulation heating is not difficult. In addition, even if you look at a single car, there are cases where many patients' meals are on the table and cooking may differ depending on the patient.
[0003]
In addition, in facilities with a large number of patients or residents, a large amount of meals are prepared, so cooking is performed at a time much earlier than the lunch time for lunch, so that the cooked food is served on the tableware and placed in the table It is left in the state of being put. For this reason, foods that should be eaten in a warm state often get cold, and hospital meals generally lack in taste.
[0004]
In recent years, there have been movements in response to HACCP to prevent mass food poisoning and hospital infections in hospitals, nursing homes and health facilities for the elderly, etc. In order to prevent breeding, items that have been left for a long time from the end of cooking until they are provided to patients should be stored in a cart-in refrigerator while being placed on a table and placed in a cart, and taken out from here when serving meals. It was intended for individuals.
[0005]
In this system, everything served is chilled and cannot be served to individuals as it is. Among cooked foods, those that are suitable for cooling and those that are to be kept warm at appropriate temperatures are mixed. As this heating method, using a distribution car equipped with a low-power electric heater on the lower side of the tableware that needs heating, the table is placed on the distribution car and kept in a cart-in refrigerator. In a certain state, the low-power heater was energized tens of minutes before the meal supply time, and the tableware requiring heat insulation heating was heated.
[0006]
However, since the distribution car is used in the refrigerator, the temperature sensor attached to the heater mounting surface is affected by the room temperature and the heater energization rate changes. Insulation material such as glass wool was put on the heater mounting surface so as not to be affected by room temperature.
[0007]
[Problems to be solved by the invention]
In such conventional technology, heat insulation material such as glass wool was put on the heater mounting surface where the temperature sensor inside the main body was mounted so as not to be affected by room temperature. When doing so, there is a problem that condensation occurs in the heat insulating material and the heat insulating material absorbs moisture. Therefore, it was necessary to take measures such as placing a sheet in between so that the heat treatment material would not come into contact with the wiring processing part, etc., so as not to cause poor insulation, or to completely seal the inside of the product. .
[0008]
[Means for Solving the Problems]
The present invention has been made to solve the above-described problems, and by surrounding the entire circumference of the heater, the air layer of the heater mounting portion is blocked from convection with other air layers, and the air of the heater mounting portion is The layer is a heat insulating layer.
[0009]
According to such a configuration, air (200 ° C: about 0.03 kcal / mhdeg) has a relatively low thermal conductivity compared to heat insulating materials such as glass wool (200 ° C: about 0.06 kcal / mhdeg), and the heater mounting part By using the air layer as a heat insulation layer, it can be controlled without being affected by room temperature, and there is no need to worry about insulation failure due to condensation when taking in and out of the refrigerator. Thus, it is not necessary to perform a process such as completely sealing, and a highly reliable heating device can be provided at a low price.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The present invention consists of a case and a case. A heating plate is attached to the case, a heater and a temperature sensor are attached to the inner surface of the heating plate, and a heater is provided by the output of the temperature sensor. In addition, a rib is provided on the case and / or under the case so as to surround the entire circumference of the heater so that the heater mounting space is isolated from other spaces, It is an air insulation layer that blocks convection.
[0011]
【Example】
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0012]
FIG. 1 is a top view of a tableware placed on a tray for feeding, and FIG. 2 is a cross-sectional view of a main part of the heating apparatus including a cross-sectional view taken along the line AA of FIG. FIG. 3 is a detailed cross-sectional view of the tableware and the heating device, and FIG. 4 is a schematic diagram of the structure of the lunch distribution car equipped with the heating device of the present invention.
[0013]
In the figure, reference numeral 1 denotes a tray on which dishes are placed and served to each person at the time of lunch at a hospital or a nursing home. 2, 3, 4, 5, 6, and 7 are dishes for storing cooked items. Of these, tablewares 2 and 3 are heat-resistant containers that contain cooked items that require heating, and others that do not require heating. Serve on tableware 4, 5, 6, 7 Moreover, the opening part larger than the bottom face of the tableware 2 and 3 is provided in the tray 1 of the lower part of the tableware 2 and 3, and the tableware 2 and 3 are set to this opening part.
[0014]
Reference numeral 8 denotes a main body of the heating device, which is provided at the lower portion of the tray 1 and heats the tableware 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. Tableware 2 is placed on the heating plate 11, and tableware 3 is placed on the heating plate 12, and a heater 13 and a heater 14 are attached to the heating plate 11 and the heating plate 12, respectively. . A temperature sensor 15 and a temperature sensor 16 are attached to the center of the heater 13 and heater 14 mounting surface, respectively, and a control means 17 for controlling the heater 13 and the heater 14 from the outputs of the temperature sensor 15 and the temperature sensor 16 is provided inside the main body 8. It has been.
[0015]
Further, a rib 18 is provided on the upper case 9 so as to surround the entire circumference of each of the heater 13 and the heater 14, and this rib 18 is brought close to the lower case 10 to the extent that there is no problem in assembly. In this embodiment, the rib 18 is provided on the upper case 9, but it may be provided upward on the lower case 10 or on both the upper case 9 and the lower case 10.
[0016]
By having such a configuration, the space below the heater mounting part is separated from the other spaces, so that the air layer of the heater mounting part is blocked from convection with the other space air layers, and the heater The air layer at the lower part of the attachment portion is provided as the heat insulating layer 19.
[0017]
In FIG. 4, reference numeral 20 denotes a distribution vehicle. A large number of heating devices are incorporated in the distribution vehicle 20, and a necessary number of trays 1 on which tableware 2, 3, 4 are placed are set. At this time, ingredients that require heating are placed in the dishes 2 and 3, and ingredients that do not require heating are placed in the other dishes 4 and the like. And the dishes 2 and 3 that require heating are placed in contact with the heating device main body 8.
[0018]
After the arrangement, the distribution car 20 is brought into the refrigeration room and stored at a low temperature. Thereafter, energization is started with a timer set in advance so that the food to be heated has an appropriate temperature at the time of providing meals, and the heaters 13 and 14 in the heating apparatus body 8 start heating.
[0019]
When 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. At this time, since the ribs 18 that are close to the bottom 10 of the case are provided so as to surround the entire circumference of the heaters 13 and 14, the lower space of the heater mounting portion becomes the heat insulating layer 19 and is heated without being affected by the room temperature. The surface temperature of the plates 11 and 12 can be made constant. For this reason, a wide variety of foodstuffs can be heated without being burned to an appropriate temperature.
[0020]
When it is time to provide meals, the heating is finished and the ingredients are at an appropriate temperature. The distribution car 20 is pulled out from the refrigerator to the front of each room, and from there, each individual tray 1 is distributed to each individual. . At this time, the distribution vehicle 20 is dewed because it is suddenly released from low temperature to normal temperature, but the lower air layer of the heater mounting part inside the main body 8 is used as a heat insulating layer 19 and is insulated because a heat insulating material such as glass wool is not used. It will not cause defects.
[0021]
【The invention's effect】
In the present invention, the lower air layer of the heater mounting portion is a heat insulating layer, so that the air has a relatively low thermal conductivity compared to a heat insulating material such as glass wool, and the air layer of the heater mounting portion is isolated from other spaces. By blocking air convection, it can be controlled without being affected by room temperature, and there is no need to worry about insulation failure due to condensation when taking in and out of the refrigerator. Thus, it is not necessary to perform a process such as completely sealing, and a highly reliable heating device can be provided at a low price.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention, and is a view of tableware placed on a lunch tray as viewed from above.
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.
FIG. 4 is a schematic diagram of the structure of a food distribution cart equipped with the heating device of the present invention.
[Explanation of symbols]
8: heating device main body, 9: upper case, 10: lower case, 11, 12: heating plate, 13, 14: heater, 15, 16: temperature sensor, 17: control means, 18: rib, 19: heat insulation layer.

Claims (1)

  A main body having a heating plate provided below the tray on which the tableware is placed and having a heating plate abutting against the tableware that is set in the opening of the tray and into which food that needs heating is placed, A heater provided on the inner surface side of the plate, a temperature sensor provided on the inner surface of the heating plate to which the heater is attached, and a heater provided on or under the case or both of them. A rib that surrounds the entire circumference of the heater as a heat insulating layer in the body that isolates the space below the mounting portion of the heater and the temperature sensor on the heating plate from the other space and blocks air convection And a heating device provided.

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