JPH0426022Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to a heating device for a warming meal delivery vehicle for transporting large quantities of school lunches while keeping them warm in hospitals, hotels, etc.

``Problems that conventional technology and ideas cannot solve'' Conventional heated serving trucks have a school lunch storage compartment that is sealed with insulation to prevent heat radiation and keep the food warm.
Alternatively, it is known that the school lunch storage room is heated and kept warm using a heat source such as an electric heater installed inside, but in the former case, the school lunch storage room itself is not heated, so the heat radiates internally over time. This has the disadvantage that school lunches are cooled down, and in the latter case, a heat source such as an electric heater is installed, so
The disadvantage is that the structure and handling are complicated and the cost is high.

"Means for solving the problem" This invention aims to solve the above-mentioned conventional problem.
An air inlet and an outlet for blowing out hot air are installed on the heating platform installed at the required locations, and the inlet and outlet are connected to the exhaust outlet and air supply outlet provided on the warming serving truck, and hot air is introduced into the interior. By heating the school lunch storage room through circulation, it is possible to heat the school lunch storage room and store heat before transporting the school meals without installing a heat source in the insulated serving vehicle itself, and after that, the stored school meals can be heated relatively quickly. This paper proposes a heating device for use in a warming distribution vehicle that enables food to be transported and served while being kept warm for a long period of time.

``Embodiment'' Hereinafter, an embodiment of this invention shown in the drawings will be described. As shown in FIG. , 3', and is formed into a heat-insulating box body with a heat insulating material interposed between the inner and outer stainless steel plates, and is configured to run on casters 5 attached to a bottom plate 4.

Inside each school lunch storage room 3, 3', a plurality of shelf boards 6 made of a lattice or perforated board are installed vertically.
Each room 3, 3' has a door 7 on the side that can be opened and closed freely.
7' can be opened or closed individually.

The front plate 8 of the heat-retaining serving vehicle 1 is provided with an air supply port 9 at the bottom for introducing hot air into the interior, and an exhaust port 9' for discharging the hot air at the top. ′ each has an opening/closing lid 1 which opens the opening when pressed from the outside and automatically closes the opening with a spring or the like when the pressing is released.
0, 10' are attached.

As shown in FIG. 2, the partition plate 2 has communication holes 11 and 1 at the upper and lower parts corresponding to the air supply port 9 and the exhaust port 9'.
1', and opening/closing lids 12, 12' that can be opened and closed simultaneously are attached to each communication hole 11, 11'.

The opening/closing lids 12, 12' are constructed by connecting the base ends of actuating rods 15, 15', which can be raised and lowered, to both ends of a link arm 14, which is rotated around the middle by a rotary knob 13, as shown in FIG. 2, for example. , opening/closing lids 12, 12' which are vertically slidably provided in communication holes 11, 11' are connected to the tips of these, and are configured to be opened and closed by forward and reverse rotation of the rotary knob 13.

At the bottom of the school lunch storage chambers 3 and 3', there is a groove-shaped ventilation guide made of a permeable plate such as a perforated metal plate or a perforated ceramic plate installed along the bottom plate 4 from around the openings of the air supply port 9 and the communication hole 11. 16 are provided.

The heat-retaining serving truck 1 having the above-mentioned configuration uses a heating platform 17 to store the school lunch in the school lunch storage compartment 3 before storing and transporting the school lunch.
Alternatively, a heating system associated with the heating heat source section may be configured to heat the food by introducing hot air into the interior of the food container 3' and keep the school lunch stored therein warm for a long period of time due to internal heat storage.

As shown in FIGS. 3 to 7, this heating platform 17 is installed at an appropriate location where one or more heat-retaining serving trucks 1 can be carried in, and is positioned by guide rails 18 etc. installed on the loading floor. At least one set of hot air outlets 19 and suction ports 20 that can be fitted and connected to the air supply ports 9 and exhaust ports 9' are provided on the front surface of the heated serving truck 1 facing the front plate 7. It is installed protrudingly.

In the heating base plate 17, a hot air blowing passage 21 is formed in a gap provided between a rear plate 17a and a front plate 17b detachably attached to the rear plate 17a.
9 and the suction port 20 are in communication.

Air is forced into the air passage 21 from above by a blower 22, and a heat source 23 is installed in the middle to heat the air forced out from the blower 22 and the air sucked in from the suction port 20. , and is configured to blow out from the blower outlet 19.

As the heat source 23, a heater with radiation fins, such as an electric heater shown in FIG. 3, a steam heater shown in FIG. 6, or a gas burner heater shown in FIG. 7, is used. By removing it, it is exposed to the outside and can be easily repaired and inspected.

A blower 22 is automatically driven and a heat source 23 is heated automatically when these are connected to the air supply port 9 and the exhaust port 9' of the warming serving cart 1. An operating switch 24, such as a limit switch or a magnetic proximity switch, is provided.

Note that the operating switch 24 may be provided in other parts as long as it can be turned on and off by moving the air outlet 19 and the air supply port 9, as well as the suction port 20 and the exhaust port 9' into and out of contact.

As shown in FIG. 8, the operating time and heating temperature of these blowers 22 and heat sources 23 can be set and controlled by a control panel 25 installed near the heating platform 17 and a temperature sensor installed in the ventilation path 21. As a result, after heating the inside of the food storage compartment 3 or 3' of the insulated catering vehicle 1 to the set temperature for a set time, the operation of the blower 22 and heat source 23 is automatically stopped, and the pilot lamp and It is now possible to know when the system has stopped using a buzzer, etc.

In this case, a temperature sensor may be provided in the warming serving cart 1, and when the heating reaches a predetermined temperature, a buzzer or the like will notify the completion of heating, and based on this, the warming serving cart 1 may be separated from the heating base plate 17. good.

It is also possible to provide a wiring duct in the rear empty space of the heating platform 17 and install a humidifier such as a water dish near the air outlet 19 to send moist hot air into the heat-retaining serving vehicle 1.

It is also possible to install a heat storage body with good heat storage properties inside the school lunch storage rooms 3, 3', such as the shelf board 6, so that the heat retention effect can be maintained for a longer period of time by dissipating heat from the heat storage body.

Furthermore, the air supply port 9 and the exhaust port 9' are connected to the heating serving truck 1.
It is also possible to protrude from the front plate 7 of the heating platform 17 and insert and connect it to the air outlet 19 and the suction port 20 of the heating platform 17.

"Operation of the invention" When transporting and distributing school meals in the above configuration, the insulated serving truck 1 is moved to the heating platform 17, and the air outlet 19 and suction are connected to the air supply port 9 and exhaust port 9' of the insulated serving truck 1. After the opening 20 is inserted and connected, hot air is supplied and circulated inside the school lunch storage room 3 or 3' and heated to the set temperature for a set time, the hot school lunch is placed on each shelf board 6 in the serving section, and the opening/closing door 7, 7' is closed and transported in an airtight state.

The interior of the school lunch storage room 3 or 3' heated by hot air is covered with stainless steel plates and shelf boards 6 on its inner surface.
Alternatively, the radiation effect of the heat stored in the ventilation guide etc. allows the food to be kept warm for a long time, making it possible to provide a warm school lunch even if it takes time to distribute it.

In this case, when storing hot school meals in the school lunch storage room 3 and foods such as salads, fruits, and sweets that are not recommended to be heated in the school lunch storage room 3',
Opening/closing lids 12, 1 of communication holes 11, 11' of partition plate 2
2' can be closed to prevent hot air from being introduced into the school lunch storage room 3', and both school lunch storage rooms 3,
When storing hot school lunches in 3', open/close lid 1.
2 and 12' are opened to introduce hot air into the school lunch storage chambers 3 and 3'.

Further, the lunch storage room 3' can be used as a refrigerator and heat insulator by closing the opening/closing lids 12, 12' and putting a cold source such as ice or dry ice therein.

"Effects of the invention" As described above, according to this invention, a vertical air passage is provided for blowing air by a blower, a heating source is provided in the middle of this air passage, and the upper and lower parts of the front are connected to the air passage. A heating base plate having an air outlet and a suction port, and an air supply port and an exhaust port that are connected to the air outlet and suction port of the heating base plate on the front surface in the direction of travel. Since the heating platform's suction and outlet ports are connected to the exhaust and air supply ports of the warming serving truck, hot air is introduced and circulated into the school lunch storage room, and the hot air is circulated in the school lunch storage room before transporting the food. After that, the stored school lunches can be kept warm for a considerable period of time and transported and distributed while still being warm.

In addition, since heating can be performed without installing a heat source on the food delivery vehicle itself, the structure of the food delivery vehicle can be simplified and more food storage space can be secured, making handling and maintenance easy and safe. In addition, it is economical because at least one set of hot air supply sources for heating platforms is required for a plurality of heat-retaining serving cars.

[Brief explanation of the drawing]

Fig. 1 is a partial longitudinal side view showing an embodiment of this invention, Fig. 2 is a longitudinal sectional back view of the same part, Fig. 3 is a longitudinal sectional side view of the heating base, Fig. 4 is a transverse plane of the same part, and Fig. 5 is a longitudinal sectional side view of the same part.
The figure is a longitudinal sectional front view of the same part, Fig. 6 is a longitudinal sectional side view showing an example of steam heating as the heat source of the heating platform of this invention, Fig. 7 is a longitudinal sectional side view showing an example of heating by the same gas burner, FIG. 8 is a front view showing the control panel of the heating platform of this invention. 1... Heat-retaining serving truck, 2... Partition plate, 3, 3'...
...School lunch storage room, 4...Bottom plate, 5...Casters,
6...Shelf board, 7,7'...Opening/closing door, 8...Front board,
9...Air supply port, 9'...Exhaust port, 10,10'...
Opening/closing lid, 11, 11'...Communication hole, 12, 12'...
...Opening/closing lid, 13...Rotation knob, 14...Link arm, 15, 15'...Operation rod, 16...Blower guide, 17...Heating base plate, 17a...Front plate, 1
7b... Rear plate, 18... Guide rail, 19...
...Air outlet, 20...Suction port, 21...Air duct, 2
2... Blower, 23... Heat source, 24... Operation switch, 25... Control panel.

Claims (1)

[Claims for Utility Model Registration] 1. A vertical air passage for blowing air by a blower is provided, a heating source is provided in the middle of this air passage, and an air outlet and a suction are provided at the upper and lower parts of the front surface, respectively, communicating with the air passage. Consisting of a heating platform provided with an opening, and a warming serving truck provided with an air supply port and an exhaust port that correspond to and connectable to the air outlet and suction port of the heating platform on the front surface in the running direction. A heating device for a heat-retaining serving truck, which is characterized by: 2. The heating platform is equipped with an operating switch that starts driving the blower and heating the heat source when the air outlet and suction port are connected to the air supply port and exhaust port of the warming serving truck. A heating device for a heat-retaining serving truck as set forth in claim 1 of the utility model registration claim. 3. The heat insulation according to claim 1 or 2 of the utility model registration claim, characterized in that the heating base plate is configured such that the gap between the rear plate and the front plate removably attached to the rear plate is configured as a ventilation path. A heating device in a serving car. 4. A heating device for a heat-retaining serving car as set forth in claim 1, 2, or 3 of the utility model registration claim, characterized in that the heat-retaining serving car is provided with a partition plate that partitions the inside of the car into front and rear parts. . 5. The heating device for a heat-retaining serving vehicle as set forth in claim 4, wherein the partition plate is provided with a communication port provided with a lid plate that can be opened and closed at the upper and lower portions thereof.