JPH09201236A - Catering vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a catering vehicle for forming a hot storage and a cold storage inside a vehicle main body, uniformly holding a temperature inside the cold storage and hardly drying food placed at a specified position inside the cold storage. SOLUTION: A cold air suction duct 11 and a cold air blow-off duct 12 communicated at an upper part are respectively disposed in a vertical direction inside the cold storage 10, a heat exchange 16 for cooling is provided inside the cold air suction duct 11 and a cold air suction port is provided on the lower part of the side face of the cold air suction duct 11. Then, cold air blow-off ports are provided on the plural upper and lower parts of the side face of the cold air blow-off duct 12 and a fan 17 for cold air circulation for sucking air inside the cold storage 10 from the cold air suction port into the cold air suction duct 11, sending it to the cold air blow-off duct 12 and blowing off the air cooled by the heat exchange 16 for cooling from the cold air blow-off port is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catering truck used in hospitals and schools.

[0002]

2. Description of the Related Art When a meal is distributed to each room at a hospital or school, tableware with staple foods, side dishes, desserts, etc. are arranged on a tray, and a plurality of these trays are stored in the car. While running around each room,
It is practiced to take out trays from a serving car and distribute meals.

[0003] As this car, for example, as shown in FIG. 5, a car having a function of keeping warm and cold by partitioning the inside of the body of the car to form a refrigerator 2 and a refrigerator 10 is provided. Has been done. As a method of keeping the refrigerator 10 cold, a cold air duct 21 is vertically arranged in the refrigerator 10,
Cooling heat exchanger (evaporator) in the cold air duct 21.
16 is provided, and the cold air suction port 1 is provided under the cold air duct 21.
3 is provided, a cold air circulation fan 17 is provided above the cold air duct 21, and the air in the refrigerator 10 is sucked into the cold air duct 21 from the cold air suction port 13 and blown out to the refrigerator 10 again. Then, the cold air blown out from the cold air circulation fan 17 descends, the air circulates as shown by the arrow in the figure, and the inside of the refrigerator 10 is kept cold.

However, when the inside of the refrigerator 10 is kept cold by the above method, the tray 3 inside the refrigerator 10 impedes the flow of air to cause a temperature difference between the upper and lower sides, and the food in the portion close to the cold air circulation fan 17 is removed. There is a problem that the drying is accelerated.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to partition the vehicle body in the front-rear direction to provide a heat storage inside the vehicle body. In a car that forms a refrigerator and keeps it cool by providing a cooling heat exchanger in the refrigerator, the car that keeps the temperature in the refrigerator uniform and that food placed at a specific position in the refrigerator is not easily dried To provide.

[0006]

According to a first aspect of the present invention, there is provided a self-propelled vehicle including a traveling wheel driven by a motor on a lower surface of a vehicle body. Form the side of the body as an opening that can be opened and closed,
The vehicle body is partitioned in the front-rear direction to form a warm storage and a refrigerator in the vehicle body, and a cold air suction duct and a cold air blowing duct that communicate with each other at the top are arranged in the refrigerator in the vertical direction,
A cooling heat exchanger is provided in the cold air suction duct, cold air suction ports are provided in the lower part of the side surface of the cold air suction duct, and cold air blowout ports are provided at upper and lower positions on the side surface of the cold air blowout duct to suck the air in the refrigerator. A cool air circulation fan is provided for sucking air into the cool air suction duct from the mouth and sending it to the cool air blowing duct, and blowing the air cooled by the cooling heat exchanger from the cool air blowing opening.

According to a second aspect of the present invention, there is provided the vehicle according to the first aspect, wherein the cold air suction port is arranged below the cold air blowing duct.

According to a third aspect of the present invention, there is provided a vehicle according to the first or second aspect of the present invention, in which a plurality of cold air outlets provided in a cold air outlet duct are provided on the downstream side of the air flow. Is formed so that the opening area is larger than that on the upstream side.

According to the present invention, the air in the lower part of the refrigerator is sucked into the cold air suction duct from the cold air suction port, and is cooled by the cooling heat exchanger in the cold air suction duct. In the vertical direction, a plurality of cold air outlets are formed to be evenly blown between the trays and circulate to cool the inside of the refrigerator to a predetermined temperature, while maintaining the inside of the refrigerator at the predetermined temperature. , And keep the food on the tray cool.
In addition, since the air that has been cooled is blown out evenly between the trays, a large amount of air does not hit the food placed in a specific position, and it becomes difficult to dry the food placed in a specific position. .

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A delivery car according to the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway side view of an embodiment of a food service vehicle according to the present invention, and FIG. 2 is a partially cutaway view of an embodiment of a food service vehicle according to the present invention. FIG. 3 is an exploded perspective view of a cold air suction duct and a cold air blowing duct according to an embodiment of the catering car of the present invention, and FIG. 4 is a perspective view of an embodiment of the catering car of the present invention. FIG. 6 is a side view for explaining the flow of air, and FIG. 6 is a perspective view showing a cold air suction duct and a cold air blowing duct of another embodiment of the catering vehicle according to the present invention.

As shown in FIG. 1, the catering vehicle of the present invention is a bogie in which a drive wheel for traveling and a steering wheel which can be swung freely are formed on the lower surface of a vehicle body 1 by a motor such as an AC servomotor. 4 is attached and formed. The vehicle body 1 is mounted on the outer surface of the warm / cool box except for the box-shaped warm / cool box 5 made of stainless steel or the like and having openings on both side surfaces, and the open / close sections on both sides of the hot / cool box 5. Doors (not shown) are attached to the exterior panel 6 and the openings on both side surfaces of the warm / cool box 5 to be formed.

Further, the hot and cold storage 5 is partitioned in the front-rear direction to form the hot storage 2 and the refrigerator 10, and inside the hot storage 2 and the refrigerator 10, a plurality of tray receivers 7 are formed in a line in the vertical direction. Has been done. When distributing meals, a tray on which dishes arranged with food are arranged is placed on the tray receiver 7, and then the meal is distributed while being fixed so as not to move when the catering car runs.

In the refrigerator 10, a hollow cold air suction duct 11 and a cold air blowing duct 12 are arranged vertically, and a cooling heat exchanger (evaporator) 16 is provided in the cold air suction duct 11. , Cold air suction duct 1
1 and a cold air circulating fan 17 are provided above the cold air blowing duct 12 to communicate with each other, and as shown in FIG.
A cold air suction port 13 is provided on the lower surface of the cold air suction duct 11,
A cold air outlet 14 is provided on the surface of the cold air outlet duct 12 that contacts the refrigerator 10. This cold air outlet 14
Are formed in the vertical direction. Although a large number of trays are vertically arranged and stored in the refrigerator 10, the cold air outlet 14 is arranged so as to be located between the vertically adjacent trays.

Then, as shown in FIG. 4, when the cooling air exchanger 17 is operated while operating the cooling heat exchanger 16, the air in the lower part of the refrigerator 10 flows from the cold air suction port 13 into the cold air suction duct 11. Sucked, cold air suction duct 1
1, the cooled air is cooled by the heat exchanger 16 for cooling, and the cooled air is blown again from the cold air blowing ports 14 formed in the cold air blowing duct 12 in the vertical direction.
It is blown to 0 and circulates to lower the inside of the refrigerator 10 to a predetermined set temperature, keep the inside of the refrigerator 10 at the predetermined set temperature, and keep the food on the tray 3 cool. Since the plurality of cold air outlets 14 are formed in the vertical direction, the cooled air can be spread between the trays, and the inside of the refrigerator 10 can be kept cold evenly. Further, since the cooled air is blown out evenly between the trays 3, a large amount of air does not hit the food placed at a specific position, and the drying of the food placed at a specific position is promoted. It gets harder.

The cold air blowing duct 12 and the cold air suction duct 11 may be formed in an inverted L shape as shown in FIG. 6, and the cold air circulating fan 17 may communicate between them. However, as shown in FIG. 3, when the cold air suction port 13 is arranged and provided in the lower part of the cold air blowing duct 12, as shown in FIG.
After the air blown out of the tray 3 flows between the trays 3, it collides with the surface opposite to the cold air outlet 14 and descends and circulates, so that the cold air can be uniformly kept on the entire surface of the tray 3. .

The shape of the cold air outlet 14 can be set arbitrarily, but as shown in FIG. 6, the lower the air outlet 14, the larger the opening area and the larger the area of the upper portion. It is preferable that the smaller the opening area, the smaller the opening area on the downstream side of the air flow, and the larger the opening area on the upstream side. If formed in this way, the amount of air blown out from the cool air blowout port 14 on the upstream side where the wind pressure is high and the amount blown off from the cool air blowout port 14 on the downstream side where the wind pressure is low can be made substantially the same, and the temperature inside the refrigerator 10 can be reduced. Can be kept evenly cooled, and the drying of the food placed in a specific position can be further promoted.

As shown in FIG. 6, if the cold air circulation fan 17 is also formed in the lower part of the cold air suction duct 11 closer to the cold air suction port 13, the amount of air sucked into the cold air suction duct 11 is increased. Therefore, the amount of air blown out from the cold air blowout port 14 can be increased, and the temperature in the refrigerator 10 can be kept more evenly.

Further, a temperature sensor is provided in the refrigerator, and the temperature measured by this temperature sensor is compared with a predetermined set temperature, for example, on / off control is performed,
By changing the temperature of the cooling heat exchanger and the like, the temperature of the air blown out from the cold air outlet is finely adjusted to keep the temperature inside the refrigerator constant.

The cold air circulation fan is provided with a timer circuit so that the cooling of the cooling heat exchanger can be operated for a certain period of time even if the cooling heat exchanger is stopped by, for example, switching off the catering car.
It is designed to prevent failures due to overcooling of the cooling heat exchanger.

In addition, a heavy unit such as a cooler unit (compressor, evaporator, expansion valve, etc.) connected to a heat exchanger for cooling, a controller for controlling the temperature of a refrigerator, etc. It is designed to be stored in the front, back, and bottom of the lower part.

There is no particular limitation on the method for keeping the heat in the warm storage. In this embodiment, although not shown, a warm air suction duct and a warm air discharge duct are formed in the warm storage to supply the warm air. Along the side of the duct, there are multiple hot air outlets lined up and down, and on the side of the duct, there are multiple hot air inlets lined up and down, to warm the air in the storage compartment sucked from the hot air inlet. It is carried out by a method in which after heating with a heater in a wind suction duct, it is blown out from a warm air blowing port through a warm air feeding duct.

[0022]

[Example] As an example, using a food and drink cart which can store nine trays as shown in FIG. 4 up and down, nine trays with food stored at room temperature of about 20 ° C. are stored and set. After setting the temperature to 5 ° C. and keeping it cold for 30 minutes, the temperature between the trays of the refrigerator was measured. As a result, as shown in FIG. 7A, the maximum value of each temperature is 8.5 ° C. and the minimum value is 3.5 ° C.
And the difference was 5 ° C. The temperature sensor in the refrigerator is provided in the lower part of the cold air suction duct near the cold air suction port.

As a comparative example, the measurement was carried out in the same manner as in the example except that the conventional vehicle as shown in FIG. 5 was used. As a result, as shown in FIG. 7B, the maximum value of each temperature was 0 ° C., the minimum value was 10 ° C., and the difference was 10 ° C.

Further, the dryness of the foods of Examples and Comparative Examples was evaluated by visual inspection and tasting, and the dryness of the foods of Examples was good in all stages as compared with the foods of the upper stage of Comparative Example. It has been confirmed that when the cold storage method for the serving car of the invention is used, the temperature inside the refrigerator is kept uniform, and the drying of the food placed at a specific position inside the refrigerator is not easily promoted.

[0025]

According to the present invention, the lower part of the air inside the refrigerator is sucked into the cold air suction duct through the cold air suction port, cooled in the cold air suction duct by the cooling heat exchanger, and cooled. Air circulates by being blown out substantially evenly between the trays from the cold air outlets formed by arranging a plurality of pieces in the vertical direction in the cold air outlet duct, and circulates to lower the temperature inside the refrigerator to a predetermined set temperature, and at the same time, to maintain a predetermined temperature inside the refrigerator. It can be maintained at the set temperature. In addition, since air that has been cooled almost evenly between the trays is not blown, a large amount of air does not hit the food placed in a specific position, making it difficult to dry the food placed in a specific position. .

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of a serving truck according to the present invention.

FIG. 2 is a partially cutaway front view of the serving car according to the embodiment of the present invention.

FIG. 3 is an exploded perspective view of a cold air suction duct and a cold air blowing duct according to an embodiment of the catering car of the present invention.

FIG. 4 is a side view for explaining the air flow of one embodiment of the catering car according to the present invention.

FIG. 5 is a side view illustrating the flow of air in a conventional catering car.

FIG. 6 is a perspective view of a cold air suction duct and a cold air blowing duct of another embodiment of the catering car according to the present invention.

FIG. 7 is a graph in which the temperature inside the serving car is measured,
(A) is a measured value of one embodiment of the catering car according to the present invention, and (b) is a measured value of a conventional catering car.

[Explanation of symbols]

 1 Vehicle Main Body 2 Heat Storage 10 Refrigerator 11 Cold Air Suction Duct 12 Cold Air Suction Duct 13 Cold Air Suction Port 14 Cold Air Stimulation Port 16 Cooling Heat Exchanger 17 Cold Air Circulation Fan

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B62B 5/00 F25D 23/12 P F25D 23/12 B62B 3/00 Z

Claims (3)

[Claims] 1. A self-propelled catering vehicle, comprising a vehicle body (1) provided on its lower surface with traveling wheels driven by a motor, wherein a side surface of the vehicle body (1) serves as an opening / closing opening. A cold air suction duct formed by partitioning the vehicle body (1) in the front-rear direction to form a warm storage (2) and a refrigerator (10) in the vehicle body (1) and communicating with the inside of the refrigerator (10) at the top. (11) and the cold air blowing duct (12) are respectively arranged in the vertical direction, a cooling heat exchanger (16) is provided in the cold air sucking duct (11), and cold air sucking is performed at a lower part of the side surface of the cold air sucking duct (11). Along with the mouth (13), cold air blowout ports (14) are provided at a plurality of upper and lower sides of the cold air blowout duct (12) so that the air in the refrigerator (10) is sucked from the cold air suction port (13) into the cold air suction duct (11). ) Suction inside and cold air blowing duct A cool air circulation fan (17) for sending air to the cooling heat exchanger (16) and blowing out the air cooled by the cooling heat exchanger (16) from the cool air outlet (14).
A catering car characterized by being provided with. 2. The vehicle according to claim 1, wherein the cold air suction port (13) is arranged at a lower portion of the cold air blowing duct (12). 3. A plurality of cold air blowing ports (14) provided in a cold air blowing duct (12) are formed such that the downstream side of the air flow has a larger opening area than the upstream side. Claim 1 or claim 2 characterized in that
The listed car.