KR20090083543A - Freezing system of the refrigerator car amount that equip high power generator - Google Patents

Freezing system of the refrigerator car amount that equip high power generator Download PDF

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Publication number
KR20090083543A
KR20090083543A KR1020080009402A KR20080009402A KR20090083543A KR 20090083543 A KR20090083543 A KR 20090083543A KR 1020080009402 A KR1020080009402 A KR 1020080009402A KR 20080009402 A KR20080009402 A KR 20080009402A KR 20090083543 A KR20090083543 A KR 20090083543A
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KR
South Korea
Prior art keywords
vehicle
refrigeration
power generator
high power
compressor
Prior art date
Application number
KR1020080009402A
Other languages
Korean (ko)
Inventor
윤상억
Original Assignee
윤상억
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 윤상억 filed Critical 윤상억
Priority to KR1020080009402A priority Critical patent/KR20090083543A/en
Publication of KR20090083543A publication Critical patent/KR20090083543A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
    • B60P3/20—Refrigerated goods vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/005—Electro-mechanical devices, e.g. switched
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2327/00—Refrigeration system using an engine for driving a compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/021—Inverters therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B27/00—Machines, plants or systems, using particular sources of energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21154—Temperatures of a compressor or the drive means therefor of an inverter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/025—Motor control arrangements

Abstract

The present invention relates to a refrigeration apparatus for a refrigeration vehicle having a high power generator for operating a refrigeration system using a high power generator driven by an engine of a vehicle. Refrigeration apparatus for a refrigeration vehicle having a high power generator according to the present invention is connected to a condenser, a dryer, an expander, an evaporator and the compressor, a condenser, a dryer, an expander and an evaporator so that refrigerant is circulated through a compressor operated by a vehicle engine. A refrigeration vehicle refrigeration apparatus composed of piping, comprising: a high power generator connected to and driven by the engine; An inverter provided to supply power generated by the high power generator to the compressor; An auxiliary battery connected to the inverter to be charged by the power generated from the high power generator when the engine is driven; And a controller provided inside the vehicle to control the inverter. Therefore, when the vehicle is stopped for a short time, the refrigeration apparatus may be operated by using the power of the auxiliary battery, and when the vehicle is stopped for a long time, the refrigeration apparatus may be operated by using an external power source through a commercial power connection.

Description

Freezing system for the refrigerator vehicle with a high power generator {Freezing system of the refrigerator car amount that equip high power generator}

The present invention relates to a refrigeration apparatus for a refrigerating vehicle, and more particularly, by installing an auxiliary battery so as to charge a voltage when the engine is driven, and performing a refrigeration function using electric power charged in the auxiliary battery when the engine is stopped. The present invention relates to a refrigeration apparatus for a refrigeration vehicle having a high power generator capable of performing a refrigeration function by using an external AC power supply when stopped.

In general, a frozen vehicle is used to transport frozen foods such as ice cream or foods that are deteriorated well. In general, a frozen vehicle is provided with a refrigeration / freezing device in a loading compartment of a vehicle to transport frozen foods. The refrigeration vehicle includes a compressor for compressing a refrigerant in a gas state, a condenser for condensing and liquefying refrigerant gas, an expansion valve for lowering the temperature of the refrigerant, and an evaporator for vaporizing the refrigerant through heat exchange with the surroundings.

A conventional refrigeration apparatus loaded on a vehicle as described above will be described with reference to FIGS. 1 and 2.

1 is a schematic view showing a conventional refrigeration apparatus operated by an engine of a vehicle, and FIG. 2 is a schematic view showing a conventional refrigeration apparatus operated by an AC motor driven by an engine and an external power source of the vehicle.

First, referring to FIG. 1, a refrigeration apparatus driven only by an engine 10 of a vehicle includes a compressor 20 connected to an engine 10 and driven through a belt 11, and the compressor 20. The high pressure refrigerant generated in the high pressure refrigeration pipe (21) is provided through the condenser (30) to lower the temperature of the freezer compartment (not shown), and the low pressure refrigerant can be circulated through the low pressure refrigeration pipe (23). And a dryer 40, an expander 50, and an evaporator 60, which are continuously connected to the condenser 30. At this time, the compressor 20 is connected to the engine 10 through the magnetic clutch 20a.

In addition, the refrigerating device senses the low pressure of the refrigerant through the differential pressure detection line 25 connected to the expander 50 to adjust the flow rate of the refrigerant flowing through the expander 50.

However, the refrigeration apparatus using the engine 10 of the vehicle as described above has a problem that the refrigeration apparatus can no longer be operated when the engine 10 of the vehicle is stopped.

In order to solve the above problems, conventionally, as shown in FIG. 2, a refrigeration apparatus operated by an AC motor 70 driven by an engine 10 and an external power source of a vehicle has been developed. This refrigeration apparatus is connected in parallel to the refrigeration apparatus driven by the vehicle engine power as shown in Figure 1, the auxiliary compression drive unit 101 composed of the auxiliary compressor 80 through the AC motor 70 and the belt drive. It is.

Specifically, the auxiliary compression driving unit 101 for operating the refrigerating unit is connected in parallel to the refrigerating unit composed of the compressor 20, the condenser 30, the dryer 40, the expander 50 and the evaporator 60. have. The auxiliary compressor 80 of the auxiliary compression driving unit 101 is selectively interrupted by the power transmitted from the AC motor 70 by the magnetic clutch 81.

The refrigerating device is a high temperature and high pressure refrigerant flows through the discharge port of the compressor 20 when the main refrigeration device is operated by the engine of the vehicle, but the discharge port of the auxiliary compressor 80 when the auxiliary compression drive unit 101 is operated. Coolant flows out from the condenser 30 through the high pressure freezing pipe 21. In addition, the refrigerant introduced into the condenser 30 is liquefied to a high pressure liquid state in the condenser 30, passes through the dryer 40, is converted into a refrigerant having a low temperature and low pressure in the expander 50, and flows into the evaporator 60. It absorbs heat inside and vaporizes into a low pressure refrigerant. In this case, a capillary tube or a heat-sensing expander 50 is used as the expansion device, and in the case of the heat-sensitive expander 50, the refrigerant flows through the expander 50 by adjusting the low pressure through the differential pressure sensing line 25. .

In addition, the refrigerant flowing out of the evaporator 60 flows into the suction port of the subcompressor 80 through the low pressure refrigeration pipe 23. Therefore, the temperature of the freezing compartment can be maintained by driving the auxiliary compressor 80 through the AC motor 70 using the AC power source 90 without driving the engine 10.

However, the conventional refrigeration apparatus using the AC motor 70 is for connecting the separate AC motor 70, the auxiliary compressor 80 and the auxiliary compressor 80 to the condenser 30 and the evaporator 60 in the vehicle. Since additional piping must be installed, there is a problem that requires an excessive installation space.

In addition, since the compressor 20 is connected to the engine 10 by the belt 11, the compressor 20 is installed in close proximity to the engine 10 and receives a lot of heat from the engine 10, thereby reducing cooling efficiency. In addition, since the AC motor 70 must be continuously operated in order to continuously operate the refrigerating device even after the engine 10 of the vehicle is stopped, a lot of energy is consumed and energy efficiency is deteriorated.

The present invention has been made to solve the conventional problems as described above, an object of the present invention, by installing an auxiliary battery so as to charge the voltage when the engine is driven to the power stored in the auxiliary battery when the engine is stopped. It provides a refrigeration apparatus for a refrigeration vehicle equipped with a high-power generator that can reduce the installation space by installing an inverter to perform the refrigeration function by using a freezing function and at the same time stop the long time stop using the external AC power source. .

In addition, another object of the present invention is to use the auxiliary battery charged when the vehicle is running, not only to drive the refrigeration apparatus using the auxiliary battery when the vehicle is stopped for a short time, but also to install the compressor closer to the evaporator. To improve the cooling efficiency and at the same time to provide a refrigeration apparatus for a refrigeration vehicle having a high power generator that can reduce the fuel consumption of the vehicle.

In order to achieve the above object, a refrigeration apparatus for a refrigeration vehicle having a high power generator according to the present invention includes a condenser, a dryer, an expander, an evaporator, and a compressor, a condenser, a dryer so that refrigerant is circulated through a compressor operated by an engine of the vehicle. A refrigeration vehicle refrigeration apparatus comprising a pipe connected to an expander and an evaporator, the refrigeration vehicle comprising: a high power generator connected to and driven by the engine; An inverter provided to supply power generated by the high power generator to the compressor; An auxiliary battery connected to the inverter to be charged by the power generated from the high power generator when the engine is driven; And a controller provided inside the vehicle to control the inverter.

Here, the inverter is characterized in that the commercial power supply connecting portion is provided so as to connect the external commercial power when the vehicle is stopped.

The inverter may further include a switch connected to each of the auxiliary battery or the power supply connection unit to selectively use the auxiliary battery or commercial power, and a switching setting unit for selectively connecting the switch. It is characterized by being.

According to the refrigerating device for a refrigeration vehicle having a high power generator according to an embodiment of the present invention, an auxiliary battery is installed to charge electric power when the engine is driven, and thus refrigeration using the electric power charged in the auxiliary battery when the engine is stopped. Since the inverter is installed to perform the function and to connect the external power when stopping for a long time to perform the freezing function, the structure is simple, there is an effect that the installation space is reduced.

In addition, by using the auxiliary battery which is charged when the vehicle is running, the refrigeration unit is driven by using the auxiliary battery when the vehicle is stopped for a short time, and the compressor is applied to the compressor by applying power applied from the high power generator to the compressor through the inverter. It can be installed closer to the evaporator has an effect of improving the cooling efficiency.

In addition, when the vehicle is stopped for a long time, the vehicle can be turned off and the refrigeration apparatus can be operated using an external power source through a commercial power supply connection, thereby reducing fuel consumption.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

Hereinafter, with reference to the accompanying drawings a refrigeration apparatus for a refrigeration vehicle having a high power generator according to an embodiment of the present invention will be described in detail.

3 is a side view of a vehicle schematically showing a state in which a refrigeration vehicle refrigeration apparatus mounted on a vehicle according to an embodiment of the present invention, Figure 4 shows a refrigeration vehicle refrigeration apparatus having a high power generator according to an embodiment of the present invention. 5 is a block diagram showing an inverter of a refrigeration apparatus for a refrigerator vehicle according to an exemplary embodiment of the present invention.

First, as shown in FIGS. 3 and 4, the engine compartment of the vehicle 1 is operated by the driving of the engine 110 to charge a high power generator (not shown) of the vehicle 1. 111 is provided, and the high power generator 111 is connected to the engine 110 by a belt 110a driving method.

In the refrigerating device 100 according to the present embodiment, the compressor 120 generating the refrigerant is operated by the power generated from the high power generator 111. In addition, the inverter 130 is installed at the lower side of the vehicle 1 so that the compressor 120 can be more stably operated, and the power generated from the high power generator 111 is supplied to the compressor 120 while maintaining a constant current and voltage. It is.

Accordingly, since the compressor 120 is supplied with the power of the high power generator 111 through the inverter 130, the compressor 120 is installed closer to the evaporator 129 installed above the vehicle 1. That is, since the compressor 120 may be installed close to the evaporator 129, the refrigerant circulation pipe 121 connecting the compressor 120 and the evaporator 129 may be shortened to maximize the freezing effect.

In addition, by using the power generated in the high power generator 111, the battery is charged with the surplus load remaining in the internal full load of the vehicle 1, for example, a light, an audio and an air conditioner. When the engine 110 of the vehicle 1 continues to drive even after the battery is fully charged, the high power generator 111 continues to generate power, and the vehicle 1 uses the remaining surplus load. An auxiliary battery 150 capable of charging the surplus load of the high power generator 111 is installed at one side of the vehicle 1 so that the refrigeration apparatus 100 can be operated without stopping the engine 110 when the vehicle stops for a short time. .

The auxiliary battery 150 is connected to the inverter 130 and is charged by the power generated by the high power generator 111. One side of the auxiliary battery 150 is further provided with a power amount display unit 151 to check the remaining power amount of the auxiliary battery 150.

The refrigeration cycle of the refrigerating device 100 according to the present embodiment will be described with reference to FIG. 3. When the compressor 120 is operated by the high power generator 111 or the auxiliary battery 150, the high-pressure refrigerant is circulated in the circulation pipe 121. Is moved to the condenser 123, and the refrigerant reaches the condenser 123, and heat loss is generated to switch to the low pressure state. At this time, a separate cooling fan (not shown) is installed in the condenser 123 to quickly discharge the heat of the condenser 123 to the atmosphere through the cooling fan, thereby reducing the temperature of the high temperature and high pressure refrigerant more quickly.

The low pressure refrigerant is discharged to the evaporator 129 through the dryer 125 and the expander 127. At this time, as the refrigerant in the liquefied state is vaporized, heat loss is generated due to a rapid pressure difference, and the heat lost is The evaporator 129 is rapidly cooled around because it is absorbed from the outside air. When the low temperature air around the evaporator 129 is discharged into the inner cavity using the exhaust fan 129a, the internal temperature of the freezing compartment is lowered.

On the other hand, the driver's seat of the vehicle 1 is provided with a controller 160 so that a driver or a user can operate the refrigeration apparatus (100).

In the refrigerating device 100 according to the present embodiment configured as described above, as shown in FIG. 5, the inverter 130 selectively compresses the power of the high output generator 111 or the auxiliary battery 150. ) Or otherwise it is configured to supply commercial power to the compressor (120).

Inverter 130 is further provided with a power supply connecting portion 131 to operate the compressor 120 using a power source, for example, 220V AC power for home. In addition, the inverter 130 includes first to third switches 133a, 133b, and 133c which may selectively connect the high power generator 111, the auxiliary battery 150, and the power supply connection unit 131 to the compressor 120. And a switching setting unit 135 controlled by the controller 160 to control the switch unit 133.

The first switch 133a of the inverter 130 selectively connects the auxiliary battery 150 and the compressor 120, and the second switch 133b selectively connects the high power generator 111 and the compressor 120. The third switch 133c selectively connects the commercial power supply connecting portion 131 and the compressor 120. Accordingly, the user can easily select the power used by the compressor 120 according to whether the vehicle 1 is driven or the stop time of the vehicle 1.

Hereinafter, the operation and operation of the refrigeration apparatus for a refrigeration vehicle having a high output power generator according to the present embodiment configured as described above will be described in detail.

First, while the vehicle 1 is in operation, the second switch 133b is grounded by manipulating the switching setting unit 135 to operate the compressor 120 by the high power generator 111 and the high power generator 111 and the compressor 120. ) Is connected to operate the refrigerating device 100. At this time, the auxiliary battery 150 is charged by the surplus load remaining after using the entire internal load of the vehicle 1.

When the vehicle 1 stops temporarily, the second switch 133b is short-circuited and the first switch 133a is connected to supply the power of the auxiliary battery 150 to the compressor 120 to supply the refrigeration apparatus 100. Start up. Then, the refrigeration apparatus 100 can be operated even when the vehicle 1 is turned off, so that the fuel consumption of the vehicle 1 can be reduced. At this time, since the user can check the remaining power of the auxiliary battery 150 through the power display unit 151, it is possible to prevent the auxiliary battery 150 from being discharged.

In addition, when the vehicle 1 stops for a long time, the first and second switches 133a and 133b are short-circuited, and the third switch 133c is connected to connect the commercial power supply connecting portion 131 and the compressor 120. Then, an external power source is connected to the commercial power supply connecting unit 131 to operate the compressor 120 to operate the copper apparatus 100.

What has been described above is only one embodiment for carrying out the present invention, and the present invention is not limited to the above-described embodiment, and the present invention is made without departing from the gist of the present invention as claimed in the following claims. Anyone with ordinary knowledge in this field will have the technical spirit of the present invention to the extent that various modifications can be made.

1 is a schematic view showing a conventional refrigeration apparatus operated by an engine of a vehicle.

2 is a schematic view showing a conventional refrigeration apparatus operated by an AC motor driven by an engine and an external power source of a vehicle.

3 is a side view of a vehicle schematically showing a state in which a refrigeration vehicle refrigeration apparatus mounted on the vehicle according to an embodiment of the present invention.

Figure 4 is a block diagram showing a refrigeration apparatus for a refrigeration vehicle having a high power generator according to an embodiment of the present invention.

5 is a block diagram showing an inverter of a refrigeration vehicle refrigeration apparatus according to an embodiment of the present invention.

♠ Code description for the main part of the drawing ♠

100: refrigeration unit 111: high power generator

120: compressor 123: condenser

125: dryer 127: expander

129: evaporator 130: inverter

131: commercial power connection unit 135: switching setting unit

150: secondary battery

Claims (3)

A refrigeration vehicle refrigeration apparatus comprising a condenser, a dryer, an expander, an evaporator, and pipes connected to the compressor, the condenser, a dryer, an expander, and an evaporator so that refrigerant is circulated through a compressor operated by a vehicle engine. A high power generator connected to and driven by the engine; An inverter provided to supply power generated by the high power generator to the compressor; An auxiliary battery connected to the inverter to be charged by the power generated from the high power generator when the engine is driven; And A controller provided inside the vehicle to control the inverter; Refrigeration apparatus for a refrigeration vehicle having a high power generator comprising a. The method of claim 1, The inverter is a refrigeration vehicle refrigeration apparatus having a high-power generator, characterized in that the commercial power supply connecting portion is provided so as to connect the external commercial power when the vehicle is stopped. The method of claim 2, The inverter further includes a switch connected to each of the auxiliary battery or the used power supply connecting unit so as to selectively use the auxiliary battery or commercial power, and a switching setting unit for selectively connecting the switch. Refrigeration device refrigeration vehicle having a high power generator.
KR1020080009402A 2008-01-30 2008-01-30 Freezing system of the refrigerator car amount that equip high power generator KR20090083543A (en)

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KR1020080009402A KR20090083543A (en) 2008-01-30 2008-01-30 Freezing system of the refrigerator car amount that equip high power generator

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011132904A2 (en) * 2010-04-19 2011-10-27 주식회사 시원 Apparatus and method for controlling power of vehicle for carrying frozen, refrigerated and heated food
WO2011071769A3 (en) * 2009-12-08 2011-11-03 Thermo King Corporation Method of controlling inlet pressure of a refrigerant compressor
KR101147393B1 (en) * 2010-02-03 2012-05-22 주식회사 시원 Refrigerator of a refrigerrating vehicle
WO2012144664A1 (en) * 2011-04-19 2012-10-26 주식회사 시원 Cooling system for refrigerated vehicle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011071769A3 (en) * 2009-12-08 2011-11-03 Thermo King Corporation Method of controlling inlet pressure of a refrigerant compressor
US9453669B2 (en) 2009-12-08 2016-09-27 Thermo King Corporation Method of controlling inlet pressure of a refrigerant compressor
KR101147393B1 (en) * 2010-02-03 2012-05-22 주식회사 시원 Refrigerator of a refrigerrating vehicle
WO2011132904A2 (en) * 2010-04-19 2011-10-27 주식회사 시원 Apparatus and method for controlling power of vehicle for carrying frozen, refrigerated and heated food
WO2011132904A3 (en) * 2010-04-19 2012-03-01 주식회사 시원 Apparatus and method for controlling power of vehicle for carrying frozen, refrigerated and heated food
WO2012144664A1 (en) * 2011-04-19 2012-10-26 주식회사 시원 Cooling system for refrigerated vehicle

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