JP2000018810A - Meal delivery vehicle with cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a condenser and save electric power of a heater of a heating chamber in a vehicle having a cooling device assembled into a cabinet having a cold storage chamber for utilizing radiation of the condenser. SOLUTION: On the top of a unit base 1 are installed a compressor 2, a condenser 3, and a fan motor 4 for the condenser, and on the bottom of the unit base 1 are installed an evaporator 5 and a fan motor 6 for the evaporator. The condenser 3 and the evaporator 5 are interconnected by a piping and a capillary tube 7, and a sub condensation pipe 11 is provided for connection to the condenser 3 via a heating chamber 8 from the compressor 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catering vehicle equipped with a cooling device, which is incorporated in a cabinet having a refrigerator compartment and a warm compartment, and has a cooling device that utilizes heat radiation from a condenser.

[0002]

2. Description of the Related Art In recent years, catering trucks have rapidly spread to hospitals and hotels due to labor shortages and hygiene, and in particular, those equipped with a function of keeping cool and warm are increasing.

[0003] A conventional serving truck with a cooling device will be described below with reference to the drawings. FIG. 6 is an external view of a conventional catering car with a cooling device, and FIG. 7 is a cross-sectional view of FIG.

[0004] In the figure, a unit base 1 is dropped from the top of a cabinet, and a compressor 2, a condenser 3 and a fan motor 4 for a condenser are installed on the upper surface thereof, and an evaporator 5 and an evaporator 5 are provided on the lower surface. Dexterous fan motor 6
Is installed, piping is provided on the upper and lower surfaces with the base interposed, and the capillary tube 7 is connected to the piping.

The heating chamber 8 is heated by a heater 9 and the air is stirred by a fan motor 10 for stirring to keep the temperature uniform.

[0006] The operation of the apparatus configured as described above will be described below. The refrigerant gas is compressed by the compressor 2, and the high-temperature and high-pressure refrigerant gas is supplied to the condenser 3. When the high-temperature and high-pressure refrigerant gas passes through the inside of the pipe of the condenser 3, it is cooled and liquefied by the outside air by the action of the condenser fan motor 4 to become a high-pressure and low-temperature liquid refrigerant.

The high-pressure and low-temperature liquid refrigerant is decompressed in the capillary tube 7 and sent to the evaporator 5 where it is evaporated by the action of the evaporator fan motor 6, returns to the compressor 2 as low-pressure and low-temperature refrigerant gas, and returns to the compressor 2. The cooling cycle is repeated.

As described above, the cooling device has a function of condensing and evaporating the refrigerant. In addition, the serving car with a cooling device is generally kept cool by the cooling device and kept warm by the heating heater 9 and the stirring fan motor 10.

[0009]

However, in the above configuration, a large amount of electric power is consumed by the cooling device and the heater 9 when the catering vehicle with the cooling device is operated. Further, in order to maintain the cooling performance, the size of the condenser 3 is increased, so that not only the size of the entire cooling device cannot be reduced, but also the heat radiation from the condenser 3 and the wind noise from the fan motor 4 for the condenser are not generated. It was giving pleasure.

[0010] In view of the above problems, the present invention saves power consumption of a heating heater when operating a catering car with a cooling device,
An object of the present invention is to provide a catering vehicle equipped with a cooling device equipped with a cooling device that has a cooling device that reduces the size of the condenser fan, reduces the size of the fan motor for the condenser, reduces wind noise, and does not cause discomfort.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a compressor, a sub-condensation pipe, a condenser, a capillary tube and an evaporator. The sub-condensation pipe is installed inside the room and used to heat the storage room.

Further, in the above configuration, the sub-condensation pipe can be disposed on the wall surface of the storage room, and the sub-condensation pipe may be attached to the wall surface of the storage room with metal foil.

Further, the sub-condensation pipe may be disposed on the lower surface of the serving rack of the storage compartment in a thermally conductive manner.

[0014] Further, by installing an electromagnetic valve in the middle of the sub-condensation pipe, or by incorporating an electromagnetic valve in the middle of the sub-condensation pipe and incorporating a variable speed fan motor for a condenser capable of changing the speed, a serving with a cooling device is provided. When driving a car, it is possible to reduce the power consumption of the heater, reduce the size of the condenser, reduce the size of the condenser fan motor, reduce wind noise, and eliminate discomfort.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the configurations described in the claims can be implemented as embodiments. In order to facilitate the implementation, the operation is described below in addition to the configurations.

That is, the invention according to claim 1 of the present invention comprises a refrigeration cycle in which a compressor, a sub-condensation pipe, a condenser, a capillary tube and an evaporator are sequentially connected in a ring shape, and a storage chamber. By arranging a part or the entirety of the condensing pipe in the storage chamber, it is possible to utilize the heat radiation of the sub-condensing pipe and to reduce the size of the condenser. In addition, the heater in the storage room can save power and save energy.

Further, according to the second aspect of the present invention, by disposing the sub-condensation pipe on the wall surface of the storage compartment, it is possible to utilize the heat radiation of the sub-condensation pipe over the entire wall surface. It is possible to further reduce the size of the vessel and save electricity of the heater in the storage room.

Further, according to the third aspect of the invention, the sub-condensation pipe is attached to the wall surface of the storage room with a metal foil, so that the heat conductivity of the sub-condensation pipe is effectively reduced by the heat conductivity of the metal foil. Therefore, it is possible to reduce the size of the condenser and the power consumption of the heater in the storage room.

According to a fourth aspect of the present invention, a sub-condensing pipe is provided on the lower surface of a serving shelf of a storage compartment in a thermally conductive manner, so that the heat of the sub-condensing pipe can be maintained. By installing on the lower surface of the device, heat can be effectively conducted to the items to be kept warm, so that the size of the condenser can be reduced and the power of the heater in the storage room can be saved.

According to a fifth aspect of the present invention, a bypass pipe for bypassing the sub-condensation pipe is provided, a solenoid valve is incorporated in the middle of the bypass pipe, and a temperature sensor is installed in the storage compartment. When the temperature of the storage chamber rises, the solenoid valve is closed by the temperature sensor, and the refrigerant flows through the bypass pipe to prevent reverse heat conduction from the storage chamber to the bypass pipe, and to reduce the size and temperature of the condenser. It is possible to save power of the heater in the storage room.

According to a sixth aspect of the present invention, a bypass pipe for bypassing the sub-condensation pipe is provided, a solenoid valve is incorporated in the middle of the bypass pipe, a temperature sensor is installed in the storage compartment, and the condenser can be used. With the configuration in which the variable speed fan motor is linked to the temperature sensor, when the temperature of the storage room becomes high, the temperature sensor detects the temperature of the storage room and operates the solenoid valve to remove the refrigerant gas. By bypassing the bypass pipe to the condenser, and the variable speed fan motor for the condenser rotating at high speed, the cooling system can be controlled normally without lowering the condensation capacity.

(Embodiment 1) Hereinafter, a serving truck with a cooling device according to Embodiment 1 of the present invention will be described with reference to FIG.

FIG. 1 is a sectional view of a catering car with a cooling device according to the first embodiment of the present invention. The unit base 1 is dropped from the top of the cabinet, and the compressor 2, condenser 3 and fan motor 4 for condenser are installed on the upper surface, and the evaporator 5 and fan motor 6 for evaporator are installed on the lower surface. , The upper and lower surfaces of which are sandwiched by a base, and the capillary tube 7 is connected.

The heating chamber 8 is heated by a heater 9 and the air is stirred by a stirring fan motor 10 to keep the temperature uniform. The above points are the same as those of the conventional example shown in FIGS. The first embodiment of the present invention is different from the related art in that the sub-condensation pipe 11 is specially provided. The sub-condensing pipe 11 is connected to the condenser 3 from the compressor 2 via the storage room 8.

The operation of the apparatus configured as described above will be described below. The refrigerant gas, which has been compressed by the compressor 2 to have a high temperature and a high pressure, passes through the sub-condensation pipe 11 and exchanges heat with the air in the storage room 8 to raise the temperature of the storage room 8. Are also condensed by heat radiation and supplied to the condenser 3 in a gas-liquid mixed state. When the refrigerant in the two-phase state passes through the inside of the pipe of the condenser 3, it is cooled and liquefied by the outside air by the action of the condenser fan motor 4, and becomes a high-pressure and low-temperature liquid refrigerant.

The high-pressure and low-temperature liquid refrigerant is decompressed in the capillary tube 7 and sent to the evaporator 5 where it is evaporated by the action of the evaporator fan motor 6, returns to the compressor 2 as low-pressure and low-temperature refrigerant gas and returns to the compressor 2 for cooling. The cycle repeats.

As described above, by installing a part of the sub-condensation pipe 11 in the storage room 8, the heating of the storage room 8 and the condensation of the refrigerant can be performed at the same time. Power saving of the heater 9 in the chamber 8 can be achieved.

(Embodiment 2) A serving truck with a cooling device according to Embodiment 2 of the present invention will be described below with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

FIG. 2 is a sectional view of the storage room 8, and the sub-condensing pipe 11A is bonded to the wall surface of the storage room 8 with an adhesive having good thermal conductivity.

The operation of the apparatus configured as described above will be described below. When passing through the sub-condensation pipe 11A, the high-temperature and high-pressure refrigerant gas discharged from the compressor 2 causes the sub-condensation pipe 11A
Is adhered, heat is conducted to the entire wall of the storage room 8 to enhance the condensation effect of the refrigerant gas, and at the same time, the storage room 8 can be heated.

As described above, by adhering the sub-condensing pipe 11A to the wall surface of the storage room 8 with an adhesive having good thermal conductivity, heat can be transmitted to the entire wall of the storage room 8 and the refrigerant At the same time as enhancing the gas condensation effect, the heating chamber 8 can be heated, and the condenser 3 can be reduced in size and the heater 9 in the heating chamber 8 can be saved.

(Embodiment 3) A serving truck with a cooling device according to Embodiment 3 of the present invention will be described below with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

FIG. 3 is an enlarged cross-sectional view of the wall surface of the storage room 8.
2 bonded.

The operation of the apparatus configured as described above will be described below. When the high-temperature and high-pressure refrigerant gas discharged from the compressor 2 passes through the sub-condensation pipe 11B, the sub-condensation pipe 11B
Is bonded by the metal foil 12, heat can be conducted to the entire wall of the storage room 8, and the condensation effect of the refrigerant gas can be enhanced, and the storage room 8 can be heated at the same time.

As described above, by bonding the sub-condensing pipe 11B to the wall surface of the storage room 8 with the metal foil 12, heat can be conducted to the entire wall of the storage room 8 and the refrigerant gas condensing effect is enhanced. At the same time, the heating room 8 can be heated, and the condenser 3
And the power consumption of the heater 9 of the storage room 8 can be saved.

(Embodiment 4) A serving truck with a cooling device according to Embodiment 4 of the present invention will be described below with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

FIG. 4 is a cross-sectional view of the storage room 8. The sub-condensing pipe 11C is thermally conductively bonded to the bottom of the serving rack 13 of the storage room 8 with an adhesive or a metal foil having good heat conductivity. .

The operation of the apparatus configured as described above will be described below. When the high-temperature and high-pressure refrigerant gas discharged from the compressor 2 passes through the sub-condensation pipe 11C, the sub-condensation pipe 11C is thermally conductively bonded to the bottom surface of the serving shelf 13 of the warming room 8 so as to be heated. Heat can be conducted to the bottom surface of the serving rack 13 of the storage room 8, so that not only the effect of directly heating the food placed on the serving shelf 13 is large, but also the effect of condensing the refrigerant gas can be enhanced. Further, a temperature sensor is installed on the wall surface of the storage room 8.

As described above, the sub-condensation pipe 11C is thermally conductively bonded to the bottom of the serving shelf 13 of the storage room 8, so that heat can be conducted to the bottom of the serving shelf 13 of the storage room 8. Not only is the effect of directly heating the food placed on the serving rack 13 large, but also the effect of condensing the refrigerant gas can be increased, and the size of the condenser 3 and the power saving of the heater 9 in the warming room 8 can be reduced. It is possible to plan.

(Embodiment 5) Hereinafter, a serving truck with a cooling device according to Embodiment 5 of the present invention will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

FIG. 5 is a sectional view of a catering car with a cooling device. The sub-condensing pipe 11D is connected to the condenser 3 from the compressor 2 via the warming room 8, and the solenoid valve 14A is provided on the way.
Is incorporated. A bypass pipe 15 is provided in the middle of the sub-condensation pipe 11D, a solenoid valve 14B is incorporated in the bypass pipe 15, and a temperature sensor 16 is installed on a wall surface of the storage room 8.

The operation of the apparatus configured as described above will be described below. The high-temperature and high-pressure refrigerant gas discharged from the compressor 2 passes through the sub-condensation pipe 11D without passing through the bypass pipe 15, since the electromagnetic valve 14B is fully closed and the electromagnetic valve 14A is fully open. When the refrigerant passes through the sub-condensation pipe 11D, the refrigerant exchanges heat with the air in the storage room 8 to raise the temperature of the storage room 8, and the refrigerant gas is also condensed by heat radiation and the condenser in a gas-liquid mixed state. 3 is supplied.

However, when the temperature of the storage chamber 8 rises and becomes higher than the temperature of the sub-condensation pipe 11D, heat is transferred from the storage chamber 8 to the sub-condensation pipe 11D. Rise and adversely affect the cooling system.

In order to prevent the above phenomenon, a temperature sensor 16 is installed in the storage room 8, and the high temperature of the storage room 8 is detected by the temperature sensor 1.
6, the electromagnetic valve 14A is fully closed, and the electromagnetic valve 14B is fully opened to allow the refrigerant gas to bypass from the bypass pipe 15 to the condenser 3.

As described above, the sub-condensing pipe 11D is connected from the compressor 2 to the condenser 3 via the preserving chamber 8, and the bypass pipe 15, the solenoid valve 14A and the solenoid valve 14B are incorporated on the way, and the By installing the temperature sensor 16 in the storage room 8, it is possible to enhance the condensation effect of the refrigerant gas and at the same time to heat the storage room 8, and to reduce the size of the condenser 3 and the heating heater 9 of the storage room 8. Power saving can be achieved. In addition, storage room 8
When the temperature becomes high, the temperature sensor 16 senses the temperature of the warming room 8, and operates the solenoid valves 14A and 14B to cause the refrigerant gas to bypass the bypass pipe 15 to the condenser 3. Thus, it is possible to prevent the temperature of the refrigerant gas from rising and control the cooling system normally.

(Embodiment 6) Hereinafter, a serving truck with a cooling device according to Embodiment 6 of the present invention will be described with reference to FIG. The same components as those in the fifth embodiment are denoted by the same reference numerals, and detailed description is omitted.

FIG. 5 is a sectional view of a serving truck with a cooling device. The difference from the fifth embodiment is that the fan motor 4 for the condenser is used.
Is replaced by a variable speed fan motor for condenser 4A having a variable speed.

The operation of the apparatus configured as described above will be described below. The high-temperature and high-pressure refrigerant gas discharged from the compressor 2 passes through the sub-condensation pipe 11D without passing through the bypass pipe 15, since the electromagnetic valve 14B is fully closed and the electromagnetic valve 14A is fully open. When the refrigerant passes through the sub-condensation pipe 11D, the refrigerant exchanges heat with the air in the storage room 8 to raise the temperature of the storage room 8, and the refrigerant gas is also condensed by heat radiation and the condenser 3 is mixed in a gas-liquid state.
Supplied to

However, when the temperature of the storage chamber 8 rises and becomes higher than the temperature of the sub-condensation pipe 11D, heat is transferred from the storage chamber 8 to the sub-condensation pipe 11D. Rise and adversely affect the cooling system.

In order to prevent the above phenomenon, a temperature sensor 16 is installed in the storage room 8, and the high temperature of the storage room 8 is detected by the temperature sensor 1.
6, the electromagnetic valve 14A is fully closed, and the electromagnetic valve 14B is fully opened to allow the refrigerant gas to bypass from the bypass pipe 15 to the condenser 3.

However, the refrigerant gas is supplied to the bypass pipe 15.
, The condensing capacity is reduced. Therefore, if the condenser fan motor is a variable speed fan motor for condenser 4A and is linked with the temperature sensor 16 installed in the storage room 8, the temperature of the storage room 8 rises and the refrigerant gas is bypassed to the bypass pipe 15. Even if the condensing capacity is reduced, the cooling system can be controlled normally without lowering the condensing capacity by rotating the variable speed fan motor for condenser 4A at a high speed.

As described above, the sub-condensing pipe 11D is connected from the compressor 2 to the condenser 3 via the warming room 8, and the bypass pipe 15, the solenoid valve 14A, and the solenoid valve 14B are installed on the way. By installing the temperature sensor 16 in the storage room 8, it is possible to enhance the effect of condensing the refrigerant gas and at the same time, to heat the storage room 8, to reduce the size of the condenser 3 and to save electricity of the heating heater of the storage room 8. Can be achieved.

Further, when the temperature of the storage room 8 becomes high, the temperature sensor 16 detects the temperature of the storage room 8,
By operating the solenoid valves 14A and 14B, refrigerant gas is bypassed from the bypass pipe 15 to the condenser 3, and the variable speed fan motor 4A for the condenser rotates at high speed so that the cooling system is normally controlled without lowering the condensation capacity. It is possible to

[0054]

As described above, according to the present invention, by installing the sub-condensation pipe in the warming room, the warming of the warming room and the condensation of the refrigerant can be performed at the same time. Power saving of the heater can be achieved.

Further, the sub-condensation pipe is bonded to the wall surface of the storage room with an adhesive or metal foil, or is disposed on the bottom of the serving rack, so that the refrigerant gas is heated and the refrigerant is condensed by heat exchange. At the same time, it is possible to reduce the size of the condenser and the power consumption of the heater in the storage room.

By installing a bypass pipe and a solenoid valve in the sub-condensation pipe, installing a temperature sensor in the storage compartment, and installing a variable speed fan motor for the condenser, the cooling system can be controlled normally. It is possible.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a catering car with a cooling device according to a first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of a storage room of a catering car with a cooling device according to a second embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional view of a storage room of a catering car with a cooling device according to a third embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view of a storage room of a catering car with a cooling device according to a fourth embodiment of the present invention.

FIG. 5 is a schematic sectional view of a catering car with a cooling device according to the fifth and sixth embodiments of the present invention.

FIG. 6 is a perspective view of a conventional catering truck with a cooling device.

FIG. 7 is a schematic sectional view of the serving truck with the cooling device.

[Explanation of symbols]

2 Compressor 3 Condenser 4 Condenser fan motor 4A Condenser variable speed fan motor 5 Evaporator 6 Evaporator fan motor 7 Capillary tube 8 Storage room 9 Heater 11, 11A, 11B, 11C, 11D Sub-condensing pipe 12 Metal Foil 13 Serving rack 14A, 14B Solenoid valve 15 Bypass pipe 16 Temperature sensor

Claims (6)

[Claims] A refrigerating cycle in which a compressor, a sub-condensation pipe, a condenser, a capillary tube, and an evaporator are sequentially connected in a ring shape, and a storage chamber; A serving truck with a cooling device, which is disposed in 2. The serving truck with a cooling device according to claim 1, wherein the sub-condensation pipe is disposed on a wall surface of the storage compartment. 3. The serving truck with a cooling device according to claim 2, wherein the sub-condensation pipe is attached to a wall surface of the storage compartment with a metal foil. 4. The serving truck with a cooling device according to claim 1, wherein the sub-condensation pipe is disposed on the lower surface of the serving shelf of the storage compartment in a thermally conductive manner. 5. The serving car with a cooling device according to claim 1, wherein a bypass pipe for bypassing the sub-condensation pipe is provided, an electromagnetic valve is incorporated in the bypass pipe, and a temperature sensor is installed in the storage compartment. 6. A bypass pipe for bypassing a sub-condensation pipe is provided, an electromagnetic valve is incorporated in the bypass pipe, a temperature sensor is installed in a storage compartment, and a variable speed fan motor for a condenser is linked to the temperature sensor. The serving truck with a cooling device according to claim 1, wherein the serving truck is provided with a cooling device.