JP7306714B2 - Food heating device - Google Patents

Description

The present invention provides a plurality of heating shelves for placing trays on which a plurality of containers for holding food and drink are placed, and heating means for heating each of the plurality of food and drink placed on each heating shelf. It relates to the provided food heating device.

2. Description of the Related Art Conventionally, in facilities such as hospitals and schools, food heating apparatuses capable of simultaneously heating food and drink for a plurality of people have been used in order to provide warm food and drink to a plurality of people.

In this food heating device, a plurality of heating shelves are formed to accommodate trays on which a plurality of containers containing food and drink are placed, and the food and drink are heated by using electromagnetic waves (microwaves) on each heating shelf. A food heating apparatus has been developed that has a heating means for heating the food (see, for example, Patent Document 1).

JP-A-2015-9028

In the above-described conventional food heating device, since the heating means is provided on each heating shelf, insufficient heating or overheating may occur when the containers are heated by the heating means. It is desirable to prevent empty heating by the heating means in the absence of the

Therefore, in the present invention according to claim 1, a plurality of heating shelves are provided for placing trays on which a plurality of containers for accommodating food and drink are arranged, and the plurality of food and drink placed on each heating shelf are heated. In a food heating device provided with a heating means for It was to be.

Further, in the present invention according to claim 2, in the present invention according to claim 1, the heating means and the temperature measuring means are respectively provided corresponding to each container.

And in this invention, there exists an effect described below.

That is, in the present invention, a plurality of heating shelves for placing trays on which a plurality of containers containing food and drink are placed are provided, and heating means for heating the plurality of food and drink placed on each heating shelf. In the food heating apparatus provided with , since each heating shelf is provided with a temperature measuring means for detecting the internal temperature, the temperature inside each heating shelf can be monitored by the temperature measuring means.

In particular, when the heating means and the temperature measuring means are provided corresponding to each container, it is possible to prevent insufficient heating and overheating that may occur when the food contained in the container is heated by the heating means. can.

In addition, when the presence or absence of a tray or a container placed on a tray is detected using the temperature measuring means, the temperature can It is possible to prevent empty heating by the heating means.

The front view (a) and right side view (b) which show the food-and-drink heating apparatus (shuttle and station). The same plane sectional view (a), the same right side sectional view (b). Front sectional drawing (a) which shows a station, same right side sectional drawing (b). The front view which shows each heating shelf.

A specific configuration of the food heating device according to the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the food heating device 1 is configured to be separable into a shuttle 2 capable of accommodating food and a station 3 capable of accommodating the shuttle 2 . In the following description, as the food heating device 1, a configuration in which the movable shuttle 2 and the fixed station 3 are separable will be described. Alternatively, the configuration is not limited to a movable type and may be a fixed type.

As shown in FIG. 2, the shuttle 2 is movable (transportable) by attaching four casters 5 to the bottom of a horizontally long rectangular plate-shaped bottom plate 4. Attaching side walls 6,7. The shuttle 2 has a horizontally long rectangular plate-like top plate 8 attached between the upper ends of the left and right side walls 6 and 7, and a vertically long rectangular plate-like shutter 9 that can be opened and closed vertically between the front ends of the left and right side walls 6 and 7. , and a rear wall 10 in the form of a vertically elongated rectangular plate is mounted between the rear end portions of the left and right side walls 6 and 7 . Further, the shuttle 2 has supports 12 for supporting trays 11 for placing a plurality of tableware containing food and drink on the left and right side walls 6 and 7 with a predetermined space therebetween. As a result, the inner space surrounded by the bottom plate 4, the left and right side walls 6 and 7, the top plate 8, the shutter 9, and the rear wall 10 of the shuttle 2 is vertically divided by the tray 11 supported by the support 12. , a plurality of heating shelves 13 (here, 24 in 12 rows and 2 rows) are arranged vertically and horizontally inside. Each heating shelf 13 accommodates the trays 11 side by side.

As shown in FIG. 3, the station 3 has a hollow box-shaped top plate portion 16 formed at the upper end portions of left and right side walls 14 and 15 which are vertically elongated rectangular plates. The station 3 has a rectangular plate-like shutter 17 which can be opened and closed vertically between the front ends of the left and right side walls 14 and 15, and a hollow box-shaped rear wall between the rear ends of the left and right side walls 14 and 15. Forming 18. Thus, the station 3 forms a space 19 surrounded by the left and right side walls 14 and 15, the top plate portion 16, the shutter 17 and the rear wall portion 18 to accommodate the shuttle 2. As shown in FIG.

The station 3 includes a heating means 20 for heating food (tableware) accommodated in the shuttle 2 with the shuttle 2 accommodated therein, and a heating means 20 for detecting the temperature inside each heating shelf 13. Temperature measuring means 21 and control means (computer) 22 for controlling them are provided.

As shown in FIGS. 3 and 4, a plurality of heating means 20 (here, three) are provided on the left and right sides of the shuttle 2 at positions corresponding to the heating racks 13. Each heating means 20 heats each heating rack. Food and drink placed on trays 11 of 13 can be heated individually for each food and drink (containers 23).

Each heating means 20 connects an electromagnetic wave transmission pipe 25 for transmitting electromagnetic waves to an electromagnetic wave generator 24 for generating electromagnetic waves (here, microwaves), and emits electromagnetic waves above the electromagnetic wave transmission pipes 25. An irradiation aperture 26 is formed. The electromagnetic wave emitted from the electromagnetic wave generator 24 is emitted through the electromagnetic wave transmission pipe 25 from the electromagnetic wave irradiation opening 26 toward the food (container 23).

A plurality of (here, three) heating means 20 are provided on one side of each heating shelf 13 (the left side and the right side when the station 3 is viewed from the front). Electromagnetic wave irradiation openings 26 are formed at different positions. On the other hand, the tray 11 has marks on its upper surface, and when the tray 11 is accommodated in the proper position, each electromagnetic wave irradiation opening 26 is positioned directly below each mark. Accordingly, by placing the container 23 on the mark of the tray 11, the food and drink contained in the container 23 can be individually heated by the heating means 20 corresponding to the position. In addition, it is sufficient if each container 23 can be individually heated. A configuration in which each electromagnetic wave generator and a plurality of branched electromagnetic wave transmission pipes are provided may be employed. Moreover, the tray 11 is not limited to a tray-like one as long as it can place a plurality of foods and drinks, and may be a box-like one, a lunch box, or the like.

As shown in FIGS. 3 and 4, the temperature measuring means 21 is provided with a rectangular box-shaped casing 27 above the heating racks 13, 13 (each stage of the shuttle 2) arranged on the left and right sides of the shuttle 2, and the inside of the casing 27 A substrate 28 is attached to the bottom surface of the substrate 28, and a plurality of (here, six) temperature sensors as temperature measuring means 21 are attached downward. Openings 29 are formed in the casing 27 at positions facing the temperature measuring means 21, and the openings 29 are covered with transparent windows 30 to prevent steam or the like from adhering to the temperature measuring means 21. FIG.

Each temperature measuring means 21 is provided at a position vertically facing the electromagnetic wave irradiation opening 26 of each heating means 20, and detects the temperature of the food (cover of container 23) heated by each heating means 20. there is

Each heating means 20 and each temperature measuring means 21 are connected to the control means 22, and the temperature inside each heating shelf 13 is monitored by the control means 22 while each heating means of each heating shelf 13 is heated by the temperature measuring means 21. 20 are individually controlled.

For example, the control means 22 stores in advance the heating temperature set individually for each food (container 23) placed on the tray 11 placed on each heating shelf 13. It is possible to control so that the heating means 20 heats while detecting the temperature with the temperature detecting means 21 so that the temperature becomes . Since the heating means 20 and the temperature measuring means 21 are provided corresponding to each container 23, there is a possibility that the food contained in the container 23 is heated by the heating means 20. heating) and overheating (heating above the set temperature) can be prevented.

At that time, instead of simultaneously driving a plurality of (here, three) heating means 20 of each heating shelf 13 to heat all the containers 23, any one of the heating means 20 heats for a predetermined time. , the temperature of all containers 23 is measured by a plurality of temperature measuring means 21, and only the heating means 20 corresponding to the container 23 with the lowest temperature performs heating for a predetermined time. It may be repeated until the temperature is reached. As a result, by heating the corresponding container 23 with one of the heating means 20, it is possible to prevent the surrounding containers 23 from being heated to the set temperature or higher.

In addition, the control means 22 preliminarily drives each heating means 20 of each heating shelf 13 for a predetermined period before the main heating, measures the temperature rise at that time by the temperature detection means 21, and measures the set temperature rise. If so, it is determined that the tray 11 and container 23 are installed at the predetermined position, and if the set temperature rise is not measured, it is determined that the tray 11 and container 23 are not installed at the predetermined position. can be controlled to issue a warning or the like. In this way, the presence or absence of the tray 11 and the container 23 can be detected using the temperature detection means 21, and the heating means 20 can prevent empty heating in the absence of the tray 11 and the container 23. be able to.

Moreover, even if the heating means 20 is not driven, the presence or absence of the tray 11 or the container 23 can be detected by measuring the temperature rise caused by the difference in the heat capacity of the tray 11 or the container 23 with the temperature detecting means 21 . Further, when detecting the presence or absence of the tray 11, only one of the heating means 20 of each heating shelf 13 and the corresponding temperature measuring means 21 may be operated. Further, as the heating means 20, a plate-like heating element provided below the tray 11 can be used. When a plate-shaped heating element or the like is provided below the tray 11, by measuring the temperature with the temperature measuring means 21 without the tray 11, it is possible to check whether dirt or foreign matter is attached to the window 30 of the temperature measuring means 21. can be detected, and an alarm prompting cleaning can be issued.

As described above, the food heating device 1 is provided with a plurality of heating shelves 13 for placing the trays 11 on which a plurality of containers 23 for accommodating food and drinks are placed. In addition, heating means 20 for heating a plurality of foods and drinks are provided, and each heating shelf 13 is provided with temperature detecting means 21 for detecting the internal temperature.

Therefore, in the food heating device 1 configured as described above, the temperature inside each heating shelf 13 can be monitored by the temperature measuring means 21, and the safety of the food heating device 1 can be improved.

Moreover, the food heating apparatus 1 has a configuration in which the heating means 20 and the temperature measuring means 21 are provided corresponding to the respective containers 23, respectively.

Therefore, in the food heating device 1 configured as described above, it is possible to prevent insufficient heating or overheating that may occur when the food stored in the container 23 is heated by the heating means 20 .

Moreover, the food heating device 1 is configured to detect the presence or absence of the tray 11 using the temperature measuring means 21 .

Therefore, in the food heating device 1 configured as described above, it is possible to prevent the heating means 20 from performing empty heating in a state where the tray 11 on which the container 23 is placed is not present.

REFERENCE SIGNS LIST 1 food heating device 2 shuttle 3 station 4 bottom plate 5 casters 6,7 side walls 8 top plate 9 shutter
10 Back wall 11 Tray
12 support 13 heating shelf
14,15 side wall 16 top plate
17 Shutter 18 Rear wall
19 space 20 heating means
21 Temperature measuring means 22 Control means
23 container 24 electromagnetic wave generator
25 Electromagnetic transmission tube 26 Electromagnetic radiation opening
27 Casing 28 Board
29 Aperture 30 Window

Claims (2)

A food heating device in which a plurality of heating shelves for placing trays on which a plurality of containers for storing food and drink are placed and a heating means for heating the plurality of food and drink placed on each heating shelf are provided. in the device,
1. A food and drink heating apparatus, wherein each heating shelf is provided with temperature detecting means for detecting the internal temperature , and the temperature detecting means is used to detect the presence or absence of a tray or a container placed on the tray . 2. The food heating apparatus according to claim 1, wherein said heating means and said temperature measuring means are provided correspondingly to each container.

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