JP2000210131A - Pantry carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a temperature control structure without using a temperature sensor by providing excitation type heater materials having a self- temperature control function on members arranged in hot storage chambers. SOLUTION: The interior of a storage chamber 1 storing trays 5 is partitioned into hot storage chambers 3 and cold storage chambers 4 via partition materials 2, and excitation type heater materials 7 having a self-temperature control function are provided in the hot storage chambers 3 in this pantry carriage. As the heater materials 7, a molding material mixed with a fiber-like or powder-like conductive material such as iron, aluminum or carbon black and a synthetic resin is molded to form the side wall material of the storage chamber 1. The hot storage chambers 3 are heated by the heater materials 7 via excitation, and the cold storage chambers 4 are cooled by a cooling device 22 installed at the lower section of the carriage. A temperature control structure can be simplified without requiring a special temperature control device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulated / insulated serving truck used for serving food in a facility where meals are served, such as a hospital.

[0002]

2. Description of the Related Art Conventionally, in facilities where meals are provided, for example, hospitals, meals are served to each patient in a hospital room using a serving truck. For example, in a serving truck as shown in FIG. 10, a storage 1 having both open sides is provided on a trolley supported by wheels 27, and the interior of the storage 1 is bisected forward and backward by a central wall 28 to form a tray 5. The storage space is formed so that both sides of the storage space that can be opened can be opened and closed by a door 20 and a plurality of groups of trays 5 can be stored in both storage spaces so that the trays 5 can be freely inserted and removed.

[0003] The tray 5 is provided with a hot food placing portion and a cold food placing portion adjacent to each other and integrally, and is supported in a horizontal state in a multi-stage manner by the support pieces provided on the front and rear walls and the central wall 28. The storage space is provided in multiple stages in the storage space, and the boundary between the hot food storage portion and the cold food storage portion of the tray 5 is inserted between the upper and lower partition materials 2 to provide a storage space. Is separated by the partition member 2 and the tray 5 so as to be airtight in the front and back, and a warming room 3 is formed on one side and a refrigeration room 4 is formed on the other side.

The refrigerating room 3 is heated by a heater material 7 such as a far-infrared heater by energization.
Is cooled by the cooling device 22 installed at the lower part of the cart, so that the hot food on the tray 5 can be stored in the warm state and the cold food can be stored in the cool state at the same time.

[0005]

However, in the above-mentioned conventional serving truck, the energization control is performed by detecting the temperature of the heater material with a temperature sensor such as a thermoswitch so that the temperature of the storage compartment does not rise excessively. It is necessary to perform temperature control, and there is a problem that a temperature control structure such as installing a temperature sensor at an appropriate position capable of detecting a heater material temperature is troublesome. In addition, a large current at the time of opening / closing a switch of the temperature sensor may cause a problem such as a contact failure of the temperature sensor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a serving truck having a simple temperature control structure and improved reliability without using a temperature sensor.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, the inside of a storage for storing a tray is partitioned into a warming room and a cold room through a partition member. A serving car that heats a storage room and cools a refrigerator room, characterized in that a member disposed inside the storage room is provided with an energized heater material having a self-temperature control function. Make up.

In such a serving car, since the heater material has a self-temperature control function, the heater material itself changes the electric resistance value by the heat generated by energization, and controls the amount of heat generated by controlling the amount of energization. In addition, the inside of the storage room can be maintained at a desired constant temperature. Therefore, it is not necessary to provide a special temperature control device for maintaining the predetermined temperature in the storage room.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the member constituting the inner wall of the storage compartment is formed of a heater material.

[0010] In such a serving car, since the members constituting the inner wall of the storage room, for example, the side wall material, the top plate material, the bottom plate material and the like of the storage are formed of the heater material, these members are used as the heater material. The trouble of separately forming can be omitted.

According to a third aspect of the present invention, in the first and second aspects of the present invention, a member having a heater member is provided so as to be freely inserted into and removed from the storage compartment, and the heater member is provided with an energizing terminal portion. Is connected to the energizing terminal portion when the battery is housed in the storage room, and a connection portion for supplying power to the heater material is provided on the wall of the storage room.

In such a serving car, a member having a heater material is housed in a storage room, and a power supply terminal portion is connected to a connection portion provided on a wall of the storage room to supply electricity to the heater material and use the same. By removing this member from the storage room, cleaning of the member and the storage room can be easily performed.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, a heater member is provided in a portion of the tray disposed inside the storage compartment.

[0014] In such a serving truck, when the tray is stored in the storage, the heater material of the tray is disposed inside the storage compartment, and the heat generated by the heater material can effectively keep the hot food on the tray warm.

According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, the terminal portion and the connection portion are formed by non-contact electrodes.

In such a catering car, since the terminal portion and the connection portion are formed by non-contact electrodes, the current-carrying portions of the terminal portion and the connection portion are not exposed to the outside, and there is no risk of electric shock or leakage. .

According to a sixth aspect of the present invention, in the first to fifth aspects of the present invention, a heat storage material is provided on a member having a heater material.

In such a serving car, since the heat storage material stores heat generated by the heater material, the hot food on the tray can be effectively kept warm by the heat storage material even in the serving where the power supply to the heater material is cut off.

According to a seventh aspect of the present invention, in the first to sixth aspects of the present invention, a member having a plurality of heater members is provided in the storage room, and the position of each member is adjusted to adjust the space inside the storage room. Is made to have a desired space temperature distribution.

In such a serving car, the spatial temperature distribution in the storage room can be freely changed by adjusting the arrangement of members having a plurality of heater members. For example, when there is a tray at a low position where the temperature is low in the storage room,
When the number of trays is small and it is desired to heat only the vicinity of the tray, for example, a member having many heater materials is arranged near the tray, and the warm food on the tray can be effectively kept warm.

According to an eighth aspect of the present invention, in the first to sixth aspects of the present invention, a member having a plurality of heater members is provided in the storage room, and the heating temperature of each heater member is adjusted to control the heating temperature of each heater member. It is characterized in that the space has a desired space temperature distribution.

In such a serving car, the spatial temperature distribution in the storage room can be freely changed by adjusting the heat generation temperature of a member having a plurality of heater members. For example, when there is a tray at a low position where the temperature is low in the storage room, or when the number of trays is small and it is desired to heat only near the tray, the heating temperature of the heater material near the tray is increased, The hot food on the tray can be effectively kept warm.

[0023]

FIG. 1 shows a serving truck according to an embodiment of the present invention.
This will be described below with reference to FIGS.

FIG. 1 is a perspective view showing a serving truck according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view showing the serving truck of the above.

As shown in FIG. 1 and FIG.
The interior of the storage 1 for storing the tray 5 is partitioned into a warming room 3 and a cold room 4 via a partition member 2, and a serving for heating the warm room 3 and cooling the cold room 4. In the car, a current-carrying heater member 7 having a self-temperature control function is provided on a member arranged inside the storage compartment 3. Further, a member constituting the inner wall of the storage room 3 is formed of the heater material 7.

In this serving car, a storage 1 having an open side is provided on a cart supported by wheels 27, and the interior of the storage 1 is bisected forward and backward by a central wall 28 so as to provide a storage space for the tray 5. The storage space is opened and closed by a door 20 so that the tray 5 can be freely inserted into and retracted from both storage spaces at a plurality of levels.

The tray 5 is provided with a hot food placing portion and a cold food placing portion adjacent to each other and integrally therewith. And the storage space is provided with vertically separated partition members 2 in multiple stages, and a boundary portion between the hot food placing portion and the cold food placing portion of the tray 5 is inserted between the upper and lower partition members 2. Thereby, the storage space is separated by the partition member 2 and the tray 5 so as to be airtight in the front and back, and the storage room 3 is provided on one side and the refrigerator room 4 is provided on the other side.
And form.

The warming room 3 is heated by the heater material 7 by energization, and the cold room 4 is cooled by the cooling device 22 installed at the lower part of the cart, whereby the tray 5
The upper hot food can be stored in a warm state and the cold food can be stored in a cool state at the same time.

The heater member 7 is formed by molding a molding material which is a mixture of a conductive material having conductivity and a synthetic resin.
Is formed as a side wall material. As the conductive material, iron,
A fibrous or powdered material such as aluminum, carbon black, and silver can be used, and its compounding ratio is 5 to 5% of the molding material in order to exert the self-temperature control function on the side wall material. It is preferred to be in the range of 70 Vol%. As the synthetic resin, any of a thermoplastic resin and a thermosetting resin can be used, but the thermoplastic resin is more preferable from the viewpoint of workability in molding the side wall material. Examples of the thermoplastic resin include a polyethylene resin, a polypropylene resin, a polystyrene resin, and an ABS resin.
Examples of the thermosetting resin include a phenol resin, an epoxy resin, and a polyester resin.

In adjusting the molding material, the conductive material and the synthetic resin are charged into a kneading machine at a predetermined mixing ratio so as to be sufficiently kneaded. Kneading is usually performed at a temperature of 200 ° C. to 220 ° C. when the synthetic resin is a thermoplastic resin,
When the synthetic resin is a thermosetting resin, the heat treatment is performed at a temperature of 90 ° C. to 130 ° C. for about 10 minutes. Then, the molding material thus adjusted is compressed and compression-molded into pellets, or cut into pellets while being extruded.
Further, in forming the side wall material using such a molding material, injection molding, compression molding, extrusion molding, or the like can be employed. In order to actually use the thus obtained side wall material as the side wall material of the storage 1, it is necessary to adhere an insulating material such as an insulating sheet to both sides of the side wall material to maintain the insulation from the outside. There is.

The side wall material thus formed has a self-temperature control function. That is, since the side wall material contains a conductive material, the electric resistance value is lower than that of the synthetic resin constituting the side wall material, and when the side wall material is energized, electricity flows into the conductive material. When the temperature rises due to the heat generation, the synthetic resin of the side wall material expands due to the heat. Due to the expansion of the synthetic resin, the bonding state of the conductive material in the side wall material is increased. Is partially interrupted, the resistance value of the side wall material increases, and it becomes difficult for current to flow, and as a result, heat generation of the side wall material is suppressed. In addition, when the heat generation of the side wall material is suppressed and the temperature decreases, the synthetic resin of the side wall material shrinks, and due to the shrinkage of the synthetic resin, the bonding state of the conductive material in the side wall material is reduced. It becomes dense, the resistance value of the side wall material decreases, and a large amount of current flows. As a result, the side wall material generates heat again.

In such a serving car, since the heater 7 has a self-temperature control function, the heater 7 itself changes the electric resistance value by the heat generated by energization, and controls the amount of energization to reduce the amount of heat generated. By controlling, the inside of the storage room 3 can be maintained at a desired constant temperature. Therefore, the storage room 3
It is not necessary to provide a special temperature control device for maintaining a predetermined constant temperature. Further, since the members forming the inner wall of the storage room 3, for example, the side wall material, the top plate material, the bottom plate material, etc. of the storage 1 are formed by the heater material 7, it is troublesome to form these members separately from the heater material 7. Can be omitted.

FIG. 3 is a perspective view showing a serving truck different from that of the above embodiment of the present invention. FIG. 4 is a longitudinal sectional view showing a main part of the serving car according to the first embodiment. FIG. 5 is a circuit diagram showing an energizing circuit for the heater member 7 in the serving truck.

As shown in FIGS. 3 to 5, the serving truck is formed substantially in the same manner as the serving truck. The difference is that a member having a heater material 7 is provided so as to be freely inserted into and removed from the warming room 3, and the heater material 7 is provided with an energizing terminal 8.
When the member is stored in the storage room 3, a connection portion 9 for connecting to the power supply terminal portion 8 and supplying power to the heater member 7 is provided on the inner wall of the storage room 3. In addition, the members having the plurality of heater members 7 are dispersed and arranged in the storage room 3, and
By changing the heat generation temperature of each heater member 7, the space inside the storage room 3 has a desired space temperature distribution.

The member having the heater member 7 is formed into a substantially rectangular shape by molding a molding material, which is a mixture of a conductive material having conductivity and a synthetic resin, into a substantially rectangular shape, similarly to the serving car described above. An insulating sheet is attached around the heater material 7 to form the heater sheet 7. The long side of this member is formed to be approximately the same size as the horizontal side of the side wall material of the storage 1, the short side is formed to be approximately the same size as the vertical side of the partition member 2 of the storage 1, and the longitudinal direction is horizontal. Then, it is held by a member holding portion 30 protrudingly provided on the inner wall of the storage room 3 of the storage 1 and is attached in contact with the inner wall of the storage room 3. The current-carrying terminal portion 8 is formed in a pin shape from a conductive metal, and protrudes upward and downward from the inner surface of this member.

The member holding portion 30 is formed by a pair of holding pieces 30a and 30b vertically arranged between the positions where the upper and lower trays 5 are arranged on the inner surface of the side wall material of the storage room 3. Each of the holding pieces 30a, 30b has a claw projecting in a direction opposite to a tip end thereof.
Then, the member is inserted into the space surrounded by the claw portion from the opening of the storage case 1 so that the member can be freely inserted and removed so as to be in contact with the inner surface of the side wall material of the storage room 3. A plurality of the member holding portions 30 are arranged side by side with an interval substantially the same as the distance between the upper and lower trays 5 so as to be able to hold the members respectively.

A hole-shaped connection portion 9 for inserting the current-carrying terminal portion 8 and electrically connecting the current-carrying portion to the heater is formed at a position opposite to the current-carrying terminal portion 8 on the inner surface of the back wall of the storage compartment 3. I have. Then, when the member is held by the member holding portion 30 and inserted to the back, the energizing terminal portion 8 is inserted into the connecting portion 9 to be electrically connected and the heater material 7 is energized. The connection portion 9 is connected to the power supply circuit portion, and supplies electric power supplied from the commercial power supply via the power supply circuit portion to the heater material 7 through the power supply terminal portion 8 so that the heater material 7 generates heat. ing.

In such a serving car, the member having the heater member 7 is housed in the storage room 3, and the power supply terminal 8 is connected to the connection portion 9 provided on the inner wall of the storage room 3 to supply electricity to the heater member 7. The member is removed from the storage room 3 and the member and the inside of the storage room 3 can be easily cleaned.

Further, by arranging a member having a plurality of heater members 7 or adjusting the heat generation temperature of each heater member 7, the spatial temperature distribution in the storage room 3 can be freely changed. For example, when the tray 5 is located at a low position where the temperature is low in the storage room 3 or when the number of the trays 5 is small and it is desired to heat only the vicinity of the tray 5, many heater materials are provided near the tray 5. By disposing a member having the tray 7 or changing the heat generation temperature of the heater member 7,
The above hot food can be effectively kept warm. Note that the heat generation temperature of the heater 7 can be adjusted to a desired heat generation temperature by changing the material, blending ratio, and the like of the conductive material and the synthetic resin constituting the heater 7. Further, by changing the thickness of the member, the heat capacity of the member changes, so that the heat retention when the power is turned off and the heating rate when the power is turned on can be changed. This can be achieved by increasing the thickness of the member when it is desired to increase the heat retention when the power is off, and by reducing the thickness when increasing the heating rate when the power is on.

FIG. 6 is a perspective view showing a serving truck different from that of the above embodiment of the present invention.

As shown in FIG. 6, the serving truck is formed in substantially the same manner as the serving truck. The difference is that the heater member 7 is provided in a portion of the tray 5 arranged inside the storage compartment 3.

A sheet-like heater material 7 is buried inside the bottom plate of the hot food placing portion of the tray 5. The sheet-like heater member 7 is also formed by molding a molding material, which is a mixture of a conductive material having conductivity and a synthetic resin, into a substantially rectangular sheet shape, similarly to the serving truck. By forming the heater member 7 integrally with the tray 5 molding material, the tray 5 containing the heater member 7 can be formed. The heater member 7 is also provided with a current-carrying terminal portion 8 protruding from the inner edge of the tray 5 and formed in the form of a pin from a conductive metal, similarly to the serving truck.
have. Further, a hole-shaped connection portion 9 for inserting the current-carrying terminal portion 8 and electrically connecting the current-carrying portion to the heater is formed at a position facing the current-carrying terminal portion 8 on the inner surface of the back wall of the storage compartment 3. . Then, when the tray 5 is inserted into the storage compartment 3 to the back, the energizing terminal 8 is inserted into the connecting portion 9 to be electrically connected and the heater material 7 is energized.

In such a serving car, when the tray 5 is stored in the storage 1, the heater material 7 of the tray 5 is moved to the storage room 3.
The hot food on the tray 5 can be effectively kept warm by the heat generated by the heater member 7 disposed inside.

FIG. 7 is a perspective view showing a serving car different from that of the above embodiment of the present invention.

As shown in FIG. 7, this serving car is provided with a heater member 7 in a portion of the tray 5 disposed inside the storage compartment 3, substantially in the same manner as the serving car. The difference is that the terminal section and the connection section 9 are formed by non-contact electrodes.

The non-contact electrode is formed by a commonly used electromagnetic induction method using, for example, a coil.
The terminal section and the connection section 9 are respectively connected to the tray 5 and the storage 1
It is formed by a coil provided inside the back wall. When the tray 5 is inserted into the storage compartment 3 to the back, the terminal portion and the connection portion 9 are brought close to each other, and the heater member 7 is energized in a contactless manner by electromagnetic induction by a coil on the connection portion 9 side.

In such a serving car, the terminal section and the connecting section 9 are provided.
Are formed by non-contact electrodes, so that the terminal portion and the connection portion 9 are formed.
The current-carrying part is not exposed to the outside, and there is no risk of electric shock or leakage.

FIG. 8 is a perspective view showing a serving car different from that of the above embodiment of the present invention.

As shown in FIG. 8, the serving car is provided with a heater member 7 in a portion of the tray 5 which is disposed inside the storage compartment 3, substantially in the same manner as the serving car. The difference is
Connecting portions 9 are provided before and after the upper end portion of the partition member 2, and the energizing terminal portions 8 face the connecting portions 9 before and after the lower end portion of the boundary between the hot food placing portion and the cold food placing portion of the tray 5. It is provided in the position.

The connecting section 9 is connected to the power supply circuit section by connecting lines respectively communicating with the inside of the partition member 2 and the inner wall of the storage box 1 so that power is supplied through the connecting lines. Further, the heater member 7 is built in the tray 5, and only the energizing terminal portion 8 is exposed to the outside.

In such a serving truck, when the tray 5 is inserted into the storage compartment 3 to the back, the boundary of the tray 5 is placed on the partition member 2, and the energizing terminal portion 8 and the connecting portion 9 are connected to each other. Is connected, thereby energizing the heater member 7.

FIGS. 9A and 9B show an example of a member used for the heater member 7 used in the serving truck as described above. FIG. 9A shows the tray 5 and FIG. 9B shows the side wall member of the storage 1.

As shown in FIG. 9, these members have a heater member 7 obtained by molding a molding material which is a mixture of a conductive material having conductivity and a synthetic resin. Also,
These members are provided with a heat storage material 10. Heat storage material 10
Is formed, for example, in a sheet shape having a substantially rectangular outer shape.
Is stuck on the upper surface of the hot food placing portion and the inner surface of the side wall material of the storage 1 with an adhesive or the like.

In such a serving car, since the heat storage material 10 stores heat generated by the heater 7, the hot food on the tray 5 can be effectively used by the heat storage material 10 even in a serving where the power supply to the heater 7 is cut off. Can keep warm. In addition, in the tray 5, if a cold storage material is provided on the upper surface of the cold food placing portion by sticking or the like, the cold food on the cold food placing portion can be effectively kept cool.

It is also conceivable to form the partition member 2 with a Peltier element.

In such a serving car, since the partition member 2 is formed of a Peltier element, the temperature in the storage chamber 3 can be exchanged by the Peltier element to cool the refrigerator compartment 4, and the refrigerator compartment 4 can be cooled. Since the temperature in the chamber 4 can be exchanged by a Peltier element to heat the refrigerator compartment 3, the heat loss between the refrigerator compartment 3 and the refrigerator compartment 4 can be reduced, and the refrigerator compartment 3 can be efficiently kept warm. And the refrigerator compartment 4 can be kept cool.

[0057]

According to the first aspect of the present invention, since the heater material has a self-temperature control function, the heater material itself changes the electric resistance value by the heat generated by energization, and controls the amount of heat generated. , And the desired temperature inside the storage room can be maintained. Therefore, it is not necessary to provide a special temperature control device for maintaining the predetermined temperature in the storage room, and the temperature control structure is simplified.

According to the second aspect of the present invention, the members constituting the inner wall of the storage room, for example, the side wall material of the storage, the top plate material,
Since the bottom plate and the like are formed of the heater material, the labor of forming these members separately from the heater material can be omitted.

According to the third aspect of the present invention, the member having the heater material is housed in the storage room, and the power supply terminal is connected to the connecting portion provided on the wall of the storage room to supply power to the heater material. When used, this member is pulled out of the storage room, and the members and the storage room can be easily cleaned.

According to the fourth aspect of the present invention, when the tray is stored in the storage, the heater material of the tray is disposed inside the storage compartment, and the heat generated by the heater material effectively removes the hot food on the tray. Can keep warm.

According to the fifth aspect of the present invention, since the terminal portion and the connection portion are formed by non-contact electrodes, the current-carrying portions of the terminal portion and the connection portion are not exposed to the outside, so that the electric shock and the electric leakage are prevented. There is no fear. Therefore, it is excellent in safety.

According to the sixth aspect of the present invention, since the heat storage material stores heat generated by the heater material, the hot food on the tray can be effectively kept warm by the heat storage material even in a serving where the power supply to the heater material is cut off. .

According to the seventh aspect of the present invention, the spatial temperature distribution in the storage room can be freely changed by adjusting the arrangement of the members having a plurality of heater members. For example, when there is a tray at a low position where the temperature is low in the storage room, or when the number of trays is small and it is desired to heat only near the tray, a member having many heater materials is arranged near the tray. Thus, the hot food on the tray can be effectively kept warm.

Further, according to the present invention, by adjusting the heat generation temperature of a member having a plurality of heater members,
The spatial temperature distribution in the storage room can be freely changed.
For example, when there is a tray at a low position where the temperature is low in the storage room, or when the number of trays is small and it is desired to heat only near the tray, the heating temperature of the heater material near the tray is increased, The hot food on the tray can be effectively kept warm.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a serving car according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing the serving car according to the first embodiment.

FIG. 3 is a perspective view showing a serving truck different from the above in the embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing a main part of the serving car according to the first embodiment.

FIG. 5 is a circuit diagram showing a circuit for energizing a heater material in the serving car according to the first embodiment.

FIG. 6 is a perspective view showing a serving car different from the above in the embodiment of the present invention.

FIG. 7 is a perspective view showing a serving truck different from the above in the embodiment of the present invention.

FIG. 8 is a perspective view showing a serving truck different from the above in the embodiment of the present invention.

FIG. 9 shows an example of a member used for a heater material used in a serving car as described above, wherein (a) is a tray,
(B) is a side wall material of the storage.

FIG. 10 is a front view showing a conventional serving truck.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage 2 Partition material 3 Warm room 4 Refrigerator room 5 Tray 7 Heater material 8 Power supply terminal part 9 Connection part 10 Heat storage material 20 Door 21 Support rod 22 Cooling device 27 Wheel 28 Central wall 30 Member holding part 30a Upper holding piece 30b Lower holding piece

Claims (8)

[Claims] 1. A serving car in which the interior of a storage for storing trays is partitioned into a warming room and a cold room via a partition material, and the warming room is heated and the cold room is cooled. A serving car, characterized in that a member arranged inside the storage compartment is provided with a current-carrying heater material having a self-temperature control function. 2. The serving truck according to claim 1, wherein a member constituting an inner wall of the storage compartment is formed of a heater material. 3. A member having a heater material is detachably provided in the storage compartment, an energization terminal portion is provided on the heater material, and when the member is housed in the storage compartment, the member is connected to the energization terminal portion to connect the heater material. 3. The catering vehicle according to claim 1, wherein a connecting portion for supplying electricity to the inside of the storage compartment is provided on a wall of the storage room. 4. A heater member is provided on a portion of the tray located inside the storage compartment.
The serving car described. 5. The serving truck according to claim 1, wherein the terminal portion and the connection portion are formed by non-contact electrodes. 6. The serving truck according to claim 1, wherein a heat storage material is provided on a member having a heater material. 7. A storage room having a plurality of heater members provided therein, and the arrangement position of each member is adjusted so that the interior of the storage room has a desired space temperature distribution. Item 10. The serving truck according to items 1 to 6. 8. A storage chamber having a plurality of heater members provided therein, wherein the heating temperature of each heater member is adjusted so that the interior of the storage room has a desired space temperature distribution. The serving truck according to claim 1.