KR101383308B1 - Refrigerated Vehicle using Solar Energy and associated Control Method - Google Patents

Abstract

The present invention relates to a refrigeration tower vehicle using solar energy and a control method thereof, and more particularly, to a refrigeration tower vehicle for refrigeration and freezing and transporting a product, the engine power of the vehicle as a power source for cooling the inside of a loading box in which a package is loaded. In addition, by using a PV module to further provide a separate compressor driven by the solar power as an additional power source, by using the power source using the engine power of the vehicle and the power source using the sunlight according to the drive setting, loading The present invention relates to a refrigeration tower car using solar energy and a method of controlling the same, which can reduce fuel consumption for cooling the interior.

Description

Refrigerated tower using solar energy and control method thereof {Refrigerated Vehicle using Solar Energy and associated Control Method}

The present invention relates to a refrigeration tower vehicle and a method of controlling the same, which can be used as an auxiliary power for cooling and freezing a vehicle while powering the vehicle using power in the refrigeration tower vehicle.

As the demand for high quality is increased due to the improvement and diversification of dietary life, the low temperature distribution of instant foods, meat, frozen fish, vegetables, fruits and vegetables is increasing day by day, and the freezing (jang) equipped with a freezer for long and short distance transportation of such foods. Vehicles are widely used.

Such a refrigeration (long) vehicle is usually provided with a container-type stacking box consisting of upper, lower, left and right panels, and the loading box is provided with an opening and closing door for loading and unloading the goods, and is loaded with a cooler operated by the engine power of the vehicle. It is configured to supply cold air.

Statistics show that there are more than 1 million land-based refrigeration vehicles worldwide. There are two types of refrigeration vehicles, which use the engine power of the vehicle to operate the refrigerator and maintain a separate refrigerator separate from the engine so that the food environment can be kept at a low temperature even during transportation or stopping.

In addition, according to the hand book (4, 5), which is revised and published every year by the American Society of Heating, Refrigerating and Air-conditioning Engineers (ASHRAE), refrigeration vehicles are insulated vehicles that use a coolant such as dry ice to cool items. It is divided into refrigerated vehicles equipped with freezers equipped with vehicles and freezers. Refrigerator equipped with a refrigerator, the cooling performance of the refrigerator varies depending on the type and size of the car body, the type of heat dissipation material and the overall heat transfer coefficient. Since small cars are mostly private cars for delivery or commercial refrigeration cars for small subcontractors, the internal temperature is determined by the load of frozen food, ice cream, meat, etc. Is mostly classified into uses for 18 ° C., 0 ° C. and below.

In addition, as described above, the refrigeration vehicle (ex: top vehicle) equipped with the freezer only uses the engine power of the vehicle to cool the inside of the loading box, and thus, the vehicle is not in operation. When the power of the vehicle battery installed in the vehicle is insufficient, there is a risk that the temperature of the cargo contained in the cargo box can rise rapidly and provide an environment in which aerobic microorganisms can grow.

These refrigeration towers are a waste of energy due to excessive consumption of fuel due to fuel consumption for driving the refrigerator and low combustion efficiency of the vehicle engine. In addition, some vehicles stop operating the refrigerator to prevent power loss or reduce fuel consumption while driving. Recently, as school meals became more common, problems such as food poisoning due to the refrigeration operation were reported to the media. .

As described above, the present invention uses the engine power of the vehicle as a power source of the refrigeration air conditioner is driven to cool (refrigerate / copper) the inside of the storage box, waste of diesel fuel of the vehicle and this Since there is a problem such as transporting without driving the refrigeration air conditioner to prevent it, there is a further compressor to further form another refrigeration air conditioning cycle, such refrigeration air conditioner is powered through the PV module using solar power To produce refrigeration towers using solar energy and control method thereof to reduce consumption of vehicle fuel that is to be driven for cooling / freezing in the loading box by producing and using them as auxiliary power for cooling / freezing operation inside the loading box. It is.

Other objects and advantages of the present invention will be described hereinafter and will be understood by the embodiments of the present invention. Further, objects and advantages of the present invention can be realized by the means and the combination shown in the claims.

The present invention is a means for solving the above problems, the main compressor (40a) for compressing the refrigerant into a high temperature and high pressure gas phase by using the engine power of the transfer means as a power source, by condensing the refrigerant of high temperature and high pressure After the common condenser 50 for converting the liquid refrigerant, the main expansion valve (60a) to form the condensed refrigerant in the form of low temperature and low pressure, the liquid refrigerant of low temperature and low pressure heat exchanged with the air in the storage compartment to cool the storage compartment, the main compressor ( A main air conditioner (20) consisting of a main evaporator (70a) circulating to 40a; An additional compressor 40b that compresses the refrigerant into a high temperature and high pressure gas phase using solar energy through the PV module 41 of the transport vehicle, and a common condenser that condenses the high temperature and high pressure refrigerant into a low temperature and high pressure liquid refrigerant. 50, an additional expansion valve 60b for making the condensed refrigerant in the form of low temperature and low pressure, and an additional evaporator 70b for circulating with the additional compressor 40b after heat-exchanging with the air in the stacking liquid refrigerant at low temperature and low pressure. An additional cooling device 30; .

As described above, the present invention can reduce the amount of vehicle fuel consumed to cool / freeze the loading box in the refrigeration tower vehicle, thereby reducing the transportation cost and the selling cost.

In addition, the present invention has the effect of using an infinite energy source by using the auxiliary power to the sunlight using the PV module.

In addition, the present invention has the effect that can be used by variously changing the use of the power supply through the engine power of the vehicle and the power supply through the PV module, according to the user's arbitrary.

1 is a perspective view of one embodiment showing a refrigeration tower vehicle using solar energy according to the present invention.
Figure 2 is a flow chart of the first embodiment showing the operation of the main and additional cooling apparatus according to the present invention.
3 is a flow chart of a second embodiment showing the operation of the main and additional cooling devices according to the invention.
Figure 4 is a diagram of one embodiment showing the driving conditions of the main and additional cooling apparatus according to the present invention.

Before describing in detail several embodiments of the invention, it will be appreciated that the application is not limited to the details of construction and arrangement of components set forth in the following detailed description or illustrated in the drawings. The invention may be embodied and carried out in other embodiments and carried out in various ways. It should also be noted that the device or element orientation (e.g., "front,""back,""up,""down,""top,""bottom, Expressions and predicates used herein for terms such as "left,"" right, "" lateral, " and the like are used merely to simplify the description of the present invention, Or that the element has to have a particular orientation.

The present invention has the following features in order to achieve the above object.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

Looking at this embodiment of the present invention, by using the engine power of the transfer means as a power source, the main compressor (40a) for compressing the refrigerant into a high temperature and high pressure gaseous phase, condensing the refrigerant of high temperature and high pressure to convert it into a liquid refrigerant of low temperature and high pressure The main condenser (50a), the main expansion valve (60a) for making the condensed refrigerant in the form of low temperature low pressure, the liquid refrigerant of low temperature low pressure heat exchanged with the air in the storage box to cool the storage compartment, and then circulated to the main compressor (40a) A main air conditioner (20) consisting of a main evaporator (70a); An additional compressor 40b that compresses the refrigerant into a high temperature and high pressure gas phase using solar energy through the PV module 41 of the transport vehicle, and an additional condenser that condenses the high temperature and high pressure refrigerant into a liquid refrigerant of low temperature and high pressure. 50b, an additional expansion valve 60b for forming the condensed refrigerant in the form of low temperature and low pressure, and an additional evaporator 70b for circulating to the additional compressor 40b after heat-exchanging the liquid refrigerant at low temperature and low pressure with the air. Additional cooling device 30; characterized in that consisting of.

In addition, referring to another embodiment of the present invention, by using the engine power of the transfer means as a power source, the main compressor (40a) for compressing the refrigerant into a high-temperature high-pressure gas phase, the high-temperature high-pressure refrigerant to condense the liquid refrigerant of low temperature and high pressure The common condenser 50 for converting the heat exchanger, the common expansion valve 60 for converting the condensed refrigerant into a low temperature and low pressure form, and the low temperature and low pressure liquid refrigerant are heat-exchanged with air in the storage compartment to cool the storage compartment, and then the main compressor 40a. A main air conditioner (20) consisting of a common evaporator (70) for circulating in a furnace; An additional compressor 40b that compresses the refrigerant into a high temperature and high pressure gas phase using solar energy through the PV module 41 of the transport vehicle, and a common condenser that condenses the high temperature and high pressure refrigerant into a low temperature and high pressure liquid refrigerant. 50, a common expansion valve 60 to form the condensed refrigerant in the form of low temperature and low pressure, and a common evaporator 70 which circulates with the additional compressor 40b after exchanging heat with the air in the liquid container of the low temperature and low pressure. An additional cooling device 30; .

In addition, when any one of the main cooling device 20 and the additional cooling device 30 is operated, a plurality of three-phase valve (V) for controlling the flow direction of the refrigerant; characterized in that it is further provided.

In addition, the main air conditioner 20 is driven to the controller 80 to be driven when the difference between the internal temperature of the storage box and the set temperature is greater than the set reference value, or when the temperature gradient (dT / dt) according to time in the storage box is 0 or more. It is characterized by being controlled by.

In addition, the additional cooling device 30 is driven when the amount of charge of the PV battery 42 storing the power of the PV module 41 is greater than or equal to a preset charging amount and the difference between the internal temperature of the storage box and the set temperature is smaller than the set reference value. It is characterized in that it is controlled by the control unit 80.

In addition, the additional air-conditioning device 30 is characterized in that the PV battery 42 for storing the production power of the PV module 41 is charged and driven by a commercial power source.

In addition, looking at the control method of the refrigeration tower vehicle using the solar energy according to the invention, the step of comparing the internal temperature of the storage box with the set temperature (S200); When the difference between the internal temperature of the loading box and the set temperature is larger than the set reference value, operating the main cooling device 20 using the engine power of the transport vehicle (S300); Checking the charge amount of the PV battery 42 through the PV module 41 when the difference between the internal temperature of the loading box and the set temperature is smaller than the set reference value (S400); When the charge amount of the PV battery 42 is equal to or greater than the preset charge amount, the additional air conditioner 30 is operated (S500); Characterized in that the control method of the refrigeration tower vehicle using the solar energy.

Hereinafter, a refrigeration tower vehicle using solar energy and a control method thereof using the solar energy according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.

As shown, the refrigeration tower vehicle using the solar energy according to the present invention is provided with a loading box (B) in the form of a container at the rear of the driver's seat, the transport means 10 to load the package inside the loading box (B) And a main cooling device 20 and an additional cooling device 30.

The main cooling device 20 is to cool (or freezing) the inside of the loading box (B) of the transport means 10 (to be described below based on the cooling for convenience of description) The above for cooling / freezing The engine power of the transfer means 10 is used as a driving source of the main air conditioner 20.

In addition, the additional cooling device 30 cools the inside of the loading box B similarly to the main cooling device 20 described above, and reduces the amount of fuel of the transfer means 10 consumed to cool / cool the loading box B. In order to assist the cooling / freezing of the storage box B by using the additional cooling device 30 that uses a power source using solar energy (more specifically, sunlight).

In the present invention, in the configuration of the main cooling device 20 and the additional cooling device 30 as described above, as shown in Figure 2 and 3, respectively, there are two embodiments.

Thus, this will be described in detail with reference to FIGS. 2 and 3.

2 is a view illustrating a first embodiment of a refrigeration tower vehicle using solar energy according to the present invention. The compressor, the condenser, the expansion valve, and the evaporator are provided with a plurality of main cooling apparatuses 20 and additional cooling apparatuses 30. Each configuration is intended to be used separately rather than shared.

The main cooling device 20 in this first embodiment is to use the engine (Vehicle Engine) power of the transport means 10 as a power source, a refrigeration air conditioning apparatus is used, such a refrigeration air conditioning apparatus is a low-temperature, low pressure gas Compressor Mounting Kit (40a) for compressing the refrigerant into a gas refrigerant of high temperature, high pressure, and a main condenser (Condensor) for converting the high-temperature, high-pressure gas refrigerant delivered from the main compressor (40a) into a low-temperature, high-pressure liquid refrigerant 50a), the main expansion valve (Expansion Valve, 60a) to make the low-temperature, high-pressure liquid refrigerant delivered from the main condenser (50a) to a low-temperature, low-pressure liquid refrigerant (Expansion Valve, 60a), low temperature delivered from the main expansion valve (60a), It consists of a main evaporator (Cubic or Frontal Evaporator, 70a) to be a low-temperature, low-pressure gas refrigerant while releasing the cold air by heat-exchanging the low-pressure liquid refrigerant with the outside air. Of course, the power of the engine 11 of the transfer means 10 may be stored and used as a vehicle battery 12.

Referring to the refrigerant flow and power supply form of the main air conditioner 20 of the first embodiment, the main air conditioner 20 is operated by the engine 11 power of the vehicle, the refrigerant is the main compressor (40a) -> Main condenser (50a)-> main expansion valve (60a)-> main evaporator (70a) in order to circulate, the main evaporator (70a) is installed in the loading box (B), to cool the inside of the loading box (B) It is to play a role (Fig. 2 (A)).

In addition, the additional air conditioner 30 of the first embodiment is a refrigeration air conditioner is used as the main air conditioner 20, the main compressor 40a, the main condenser 50a, the main expansion valve used in the main air conditioner 20 60a and the main evaporator 70a are not used in common, and an additional compressor (DC Compressor) 40b, an additional condenser 50b, an additional expansion valve 60b, and an additional evaporator 70b are used separately.

In addition, unlike the main air conditioner 20, the additional cooling device 30 uses sunlight as a power source, and is fixedly installed on the outside of the transfer means 10 to condense solar light to produce power. (The photovoltaic module, solar cells connected in parallel, in parallel, and then made in close contact with special tempered glass, AL Frame, etc., 41) (In the present invention was installed on the outer upper surface of the stacking box (B), but such an installation position is If the position can receive light efficiently, it may be variously changed according to a user.), A PV battery 42 storing power generated by the PV module 41, and the PV battery ( 42 is further provided with a PV power control unit (PV Power Control) 43 to be used as a power source of the additional cooling device (30).

That is, the above-described additional cooling device 30 loads the additional cooling device 30 using solar power as the power source, instead of using only the main cooling device 20 described above in cooling the inside of the loading box B. B) by being able to be used for cooling the inside, it is to reduce the fuel consumption of the transfer means (10).

Referring to the refrigerant flow and power supply form of the additional cooling device 30 of the first embodiment, the additional cooling device 30 is operated by using a power source produced through the PV module 41, and the refrigerant is added to the cooling device. Compressor 40b-> additional condenser 50b-> additional expansion valve 60b-> additional evaporator 70b is circulated in this order, and the additional evaporator 70b is installed in the loading box B, and the loading box ( B) It is to be able to play an auxiliary role for cooling the interior (Fig. 2 (B)).

3 shows a second embodiment of a refrigeration tower vehicle using solar energy according to the present invention, in which the main air conditioner 20 and the additional air conditioner 30 are the same as the first embodiment of FIG. Unlike the valve and the evaporator, which are driven separately, the main air conditioner 20 and the additional air conditioner 30 are provided in common by providing a single component other than the compressor (condenser, expansion valve, and evaporator). It is shown by the Example so that it may be used.

That is, in the second embodiment, the main cooling device 20 uses the main compressor 40a, and the additional cooling device 30 uses the additional compressor 40b separately, but the main cooling device 20 And the additional refrigeration unit 30 has a structure using a common condenser 50, a common expansion valve 60, a common evaporator 70 together.

Of course, as in the first embodiment of FIG. 2, the main air conditioner 20 uses engine power of the vehicle as a driving source, and the additional air conditioner 30 is driven by solar power through the PV module 41. Of course, the operation of the like is the same.

Referring to the main air conditioner 20 of the second embodiment, and the refrigerant flow and power supply state of the additional air conditioner 30, the main air conditioner 20 is operated through the engine 11 power of the vehicle The refrigerant is circulated in the order of the main compressor 40a-> common condenser 50-> common expansion valve 60-> common evaporator 70, the common evaporator 70 is installed in the loading box (B) , Will serve to cool the inside of the loading box (B) (FIG. 3A).

In addition, the additional cooling device 30 is operated using a power source produced through the PV module 41, the refrigerant is an additional compressor (40b)-> common condenser (50)-> common expansion valve (60)- > The common evaporator 70 is circulated in order, and the common evaporator 70 is installed in the loading box B, and serves to cool the inside of the loading box B. FIG. ))

Figure 4 shows the control method of the refrigeration tower using solar energy through the operating relationship between the main cooling device 20 and the additional cooling device 30 of the above-described configuration according to the present invention.

1. Initialization step (step S100): This is a step of checking the temperature in the loading box (B), the voltage of the PV module 41, the driving state of the engine 11, and the like.

2. Determination step of comparing the internal temperature of the storage box and the set temperature (step S200): Comparing the internal temperature of the storage box with the preset temperature set by the user, after the comparison judgment, the main air conditioner (20) of the above-described configuration ) Or the additional cooling device 30 is driven by the control unit 80 when the respective driving conditions are met.

3. In step S200, comparing the internal temperature and the set temperature, checking whether the temperature of the internal temperature is lower than the set temperature, and operating the heater if the internal temperature is lower (step S210): of the present invention The tower vehicle may further include heating means (ex: a heater, etc.), and before the main air conditioner 20 or the additional air conditioner 30 is driven, comparing the internal temperature of the above-mentioned loading box with the set temperature ( In S200, when the temperature inside the loading box is lower than the setting temperature, the heating means is driven to reach the setting temperature in the loading box.

4. If the difference between the internal temperature and the set temperature is greater than the set reference value, the step of operating the main cooling unit 20 using the engine power of the transport vehicle (step S300): the main cooling unit 20 and the additional cooling unit ( 30 is controlled by the control unit 80 to operate according to the operating conditions, and the conditions under which the main air conditioner 20 operates first are as follows.

First, when the internal temperature of the storage box (B) is measured and the internal temperature of the storage box is judged to be compared with the set temperature, the temperature difference ㅿ T (internal temperature-set temperature) is out of the set reference value, or, second, the If the temperature gradient (dT / dt) inside the loading box is equal to or greater than 0 (when the temperature in the loading box is constant or the temperature rises), the main air conditioner 20 is driven. (Steps S200 and S300) ( ex: If the set temperature = -10 ℃ and the set reference value = 10 ℃, the main air conditioner 20 is driven when the temperature inside the loading box rises above 0 ℃.)

5. If the difference between the internal temperature of the storage box and the set temperature is less than the set reference value, the step of checking the charge amount of the PV battery 42 through the PV module 41 (S400) and the charge amount of the PV battery 42 and the preset charge amount In the above case, the additional air conditioner 30 is operated (S500): Referring to the criteria in which the additional air conditioner 30 is operated, in the remaining conditions except for the two conditions in which the main air conditioner 20 is operated as described above. When the difference between the internal temperature and the set temperature is smaller than the set reference value (ex: when the set temperature = -10 ℃, the set reference value = 10 ℃, the inside temperature of the storage box is -10 ℃ ~ 0 ℃ If the temperature of the additional cooling device 30 is driven.), The power is generated in the PV module 41 and is operated when the power is charged in the PV battery 42, in this case, to the PV battery 42 Check the charged amount and set the preset amount If the total amount is greater than or equal to the operation, and the preset filling amount, if that is filled with more than 20% from the total amount of charge 100% to charge the battery PV 42.

However, if the amount of charge stored in the PV battery 42 is 20% or less, it will be natural that the main air conditioner 20 can be operated without using the additional air conditioner 30.

Of course, although the preset charge amount of the PV battery 42 for driving the additional air conditioner 30 is described as 20% or more in the present invention, it is natural that the preset charge amount can be variously changed according to the embodiment of the user. .

In addition, the additional cooling device 30 described above may be operated by charging the PV battery 42 through a commercial power source according to the user.

Reference numeral 'V' in the drawings not described above indicates a three-phase valve, and a refrigeration tower vehicle using solar energy according to the present invention may be used in a tower vehicle for refrigeration / freezing according to an embodiment of the user.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

10: transfer means 11: engine
12: vehicle battery 13: vehicle control panel
20: main air conditioner 30: additional air conditioner
40a: main compressor 40b: additional compressor
41: PV module 42: PV battery
43: PV power supply control unit 50: common condenser
50a: main condenser 50b: additional condenser
60: common expansion valve 60a: main expansion valve
60b: additional expansion valve 70: common evaporator
70a: main evaporator 70b: addition evaporator
80:
B: Stacking Box V: 3-Way Valve

Claims (7)

The main compressor 40a compresses the refrigerant into a high temperature and high pressure gas phase using the engine power of the transfer means, the main condenser 50a converts the refrigerant of the high temperature and high pressure into a liquid refrigerant of low temperature and high pressure, and the condensed refrigerant. Main expansion valve (60a) in the form of low temperature and low pressure, the liquid cooling medium of the low temperature and low pressure, the main air cooling consisting of a main evaporator (70a) to circulate to the main compressor (40a) after cooling the storage compartment by heat exchange with the air in the storage compartment Device 20;
An additional compressor 40b that compresses the refrigerant into a high temperature and high pressure gas phase using solar energy through the PV module 41 of the transport vehicle, and an additional condenser that condenses the high temperature and high pressure refrigerant into a liquid refrigerant of low temperature and high pressure. 50b, an additional expansion valve 60b for forming the condensed refrigerant in the form of low temperature and low pressure, and an additional evaporator 70b for circulating to the additional compressor 40b after heat-exchanging the liquid refrigerant at low temperature and low pressure with the air. Additional air conditioning device 30; made of,
When any one of the main cooling device 20 and the additional cooling device 30 is operated, a plurality of three-phase valve (V) for controlling the flow direction of the refrigerant is provided,
The main air conditioner 20 is controlled by the controller 80 to be driven when the difference between the internal temperature of the storage box and the set temperature is greater than the set reference value, or when the temperature gradient dT / dt according to the time in the storage box is 0 or more. ,
The additional air conditioner 30 may be driven when the amount of charge of the PV battery 42 storing the power of the PV module 41 is greater than or equal to a preset charging amount and the difference between the internal temperature of the stacker and the set temperature is smaller than the set reference value. 80)
The additional air-conditioning device (30) is a refrigeration tower vehicle using solar energy, characterized in that the PV battery 42 for storing the production power of the PV module 41 can be driven by a commercial power source.
The main compressor 40a compresses the refrigerant into a high temperature and high pressure gas phase using the engine power of the conveying means as a power source, a common condenser 50 for condensing the high temperature and high pressure refrigerant into a liquid refrigerant having a low temperature and high pressure, and the condensed refrigerant. Main expansion of the common evaporator (70) for circulating to the main compressor (40a) after the common expansion valve (60) to make the form of low temperature and low pressure, the liquid refrigerant of low temperature and low pressure by heat exchange with the air in the storage box to cool the storage box. Device 20;
An additional compressor 40b that compresses the refrigerant into a high temperature and high pressure gas phase using solar energy through the PV module 41 of the transport vehicle, and a common condenser that condenses the high temperature and high pressure refrigerant into a low temperature and high pressure liquid refrigerant. 50, a common expansion valve 60 to form the condensed refrigerant in the form of low temperature and low pressure, and a common evaporator 70 which circulates with the additional compressor 40b after exchanging heat with the air in the liquid container of the low temperature and low pressure. Additional air conditioning device 30; made of,
When any one of the main cooling device 20 and the additional cooling device 30 is operated, a plurality of three-phase valve (V) for controlling the flow direction of the refrigerant is provided,
The main air conditioner 20 is controlled by the controller 80 to be driven when the difference between the internal temperature of the storage box and the set temperature is greater than the set reference value, or when the temperature gradient dT / dt according to the time in the storage box is 0 or more. ,
The additional air conditioner 30 may be driven when the amount of charge of the PV battery 42 storing the power of the PV module 41 is greater than or equal to a preset charging amount and the difference between the internal temperature of the stacker and the set temperature is smaller than the set reference value. 80)
The additional air-conditioning device (30) is a refrigeration tower vehicle using solar energy, characterized in that the PV battery 42 for storing the production power of the PV module 41 can be driven by a commercial power source.
Determining the internal temperature of the stacking box with the set temperature (S200);
When the difference between the internal temperature of the loading box and the set temperature is larger than the set reference value, operating the main cooling device 20 using the engine power of the transport vehicle (S300);
Checking the charge amount of the PV battery 42 through the PV module 41 when the difference between the internal temperature of the loading box and the set temperature is smaller than the set reference value (S400);
When the charge amount of the PV battery 42 is equal to or greater than the preset charge amount, the additional air conditioner 30 is operated (S500);
Control method of a refrigeration tower car using solar energy, characterized in that consisting of.
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