KR100816642B1 - Refrigerating device for refrigerator vehicle - Google Patents

Abstract

A refrigerating device for a refrigerator vehicle is provided to charge a battery using a power generator, which generates power through a driving force of an engine, without directly connecting the engine with the compressor, and to drive a compressor by using energy of the battery. A refrigerating device for a refrigerator vehicle includes a vehicle engine(11), a power generator(13), a refrigerator battery(41), a DC motor, and a refrigerating cycle device. The power generator is driven by the vehicle engine. The refrigerator battery stores power generated from the power generator. The DC motor is driven by using the power of the refrigerator battery. The refrigerating cycle device includes a compressor driven by the DC motor. A power switch is installed such that a driver operates the refrigerating device. A clutch mechanically connects/releases the DC motor to/from the compressor. The refrigerator battery supplies power through a path in which electricity is applied to the clutch and a path in which the DC motor is driven through a relay. The clutch is electrically connected to the relay, so that the DC motor is coupled to the compressor if electricity is applied to the clutch. The relay electrically connects the DC motor to the refrigerator battery, so that the compressor is driven by the DC motor.

Description

Refrigeration equipment for refrigeration towers {REFRIGERATING DEVICE FOR REFRIGERATOR VEHICLE}

The present invention relates to a refrigerating device for a refrigeration tower for transporting cold storage food, and more particularly, to a refrigerating device for driving a compressor of a refrigerating device using a DC motor.

Freezers are for transporting low-temperature, goods that cannot be stored or transported at room temperature, such as various frozen foods or low-temperature foods. A cooling device is installed on one side so that the internal temperature of the transport is at a low temperature through the evaporator of the cooling device.

In the cooling cycle of the cooling device, the refrigerant is circulated along the circulation pipe in the order of the compressor, the condenser, and the evaporator, and the cooling device according to the related art is connected to the engine directly as described in Korean Patent Laid-Open Publication No. 2005-0087005. It was driven using the power of the engine. This prior art is shown in FIG.

As the compressor is driven, the refrigerant at high temperature and low pressure reaches the condenser and becomes medium and high pressure. The refrigerant provided from the condenser passes through the expansion valve and flows into the evaporator. Therefore, since the cool air is formed around the evaporator, a separate exhaust fan discharges the cool air into the inside of the container, and the cooling cycle as described above is continuously circulated to maintain the set low temperature in the inside of the container. It is to be able to safely transport all food and beverages and cold storage items that require refrigeration and refrigeration at the optimum temperature.

However, when using the cooling cycle as described above, since the engine and the compressor are directly connected, the driver must park the refrigeration truck and turn on the engine continuously even if he leaves the seat for a short time, which wastes energy and causes the engine to be overwhelmed. There was a problem.

The present invention is to solve the above problems, the refrigeration to charge the battery using a generator that is generated by the power of the engine without connecting the engine and the compressor directly and to drive the compressor using the energy charged in the battery It is to provide a refrigeration apparatus for the tower vehicle.

Refrigerating tower vehicle refrigeration apparatus according to the present invention for solving the above problems is driven by using the power of the refrigeration battery, a refrigerator battery for storing the power produced by the generator, the generator driven by the engine and the engine for automobiles DC motor, characterized in that it comprises a refrigeration cycle including a compressor driven through the DC motor.

In addition, it characterized in that it further comprises a charger for supplying external power to the refrigerator battery.

In addition, the refrigerator battery, the relay, the DC motor, the clutch, the compressor is characterized in that it can be detachably installed in the refrigeration tower vehicle as a refrigeration unit.

According to the refrigerating device for a refrigeration truck according to the present invention, the driver can turn off the engine even when the driver parks the freezing truck and leaves the seat for a while, and the compressor can be driven not only by the engine but also by an external power source, thereby reducing energy waste. It is possible to prevent and to prevent the engine from becoming excessive.

In addition, by configuring the refrigeration unit as a unit, it is convenient to transport, maintenance, etc., and when the refrigeration function is not required, the refrigeration unit may be separated for a predetermined period and the refrigeration tower vehicle may be operated.

In addition, since the power can be supplied not only from the engine but also from an external power source, the vehicle can be refrigerated by being supplied with external power instead of the engine even when the vehicle is parked for a long time.

The preferred embodiment of the present invention will be described.

Figure 1 is a block diagram showing a refrigeration unit 40 and components connected thereto of the refrigerating apparatus according to the present invention.

As shown in FIG. 1, an engine 11, a generator 13, and a main battery 15 are mounted in an engine compartment 10 of a refrigeration tower vehicle. The engine 11 and the generator 13 are connected, and when the engine 11 turns, electricity is produced by the generator 13. The generated electricity is supplied to the main battery 15 of the engine compartment 10 and used for various electrical installations installed in the refrigeration tower vehicle.

In addition, a refrigeration battery 41 is installed in the refrigeration unit 40 of the refrigeration tower. Some of the electricity generated by the generator 13 is supplied to the main battery 15 as described above, and the rest of the electricity is supplied to the refrigerator battery 41. The main battery 15 and the refrigerator battery 41 store the generated electric power and supply the electric power when electric power is required in the electric equipment connected thereto.

The refrigerator battery 41 is connected to the charger 47 so as to receive power from an external power source as well as the generator 13. Thus, the refrigerator battery 41 may be dually supplied from the generator 13 and an external power source.

The power of the refrigerator battery 41 is divided into two paths and is supplied to the electric equipment. First, there are a line extending upward and a line extending rightward based on the refrigerator battery 41 of FIG. 1.

The upper line is supplied with relatively low power of about 10A and the right line is supplied with relatively high power of about 20A.

The upper line is connected to the cab 20. The cab 20 is provided with a power switch 21 and a temperature control switch 23. The power switch 21 and the temperature control switch 23 are exposed to be operated by a driver operating in the cab 20. The power switch 21 allows the entire refrigeration system to be turned on and off according to the driver's operation. And the temperature control switch 23 is connected to the sensor 36 of the freezer compartment 30 so that the driver can control the temperature of the freezer compartment 30 serves to maintain the temperature of the freezer compartment 30 to a constant temperature. For example, when a temperature signal indicating that the temperature of the freezer compartment 30 is greater than or equal to the set temperature comes from the sensor 36, the refrigeration cycle is driven. When a signal less than or equal to the set temperature comes from the sensor 36, the refrigeration cycle is stopped.

As described above, the freezer compartment 30 is provided with a sensor 36, which is installed adjacent to the evaporator 35 of the freezer compartment 30 to sense the temperature around the evaporator 35. In addition, the fan motor 37 is installed to blow the cold air generated in the evaporator 35 into the freezing chamber 30, which is directly connected to the power switch 21 of the cab 20.

The sensor 36 is also connected to the dryer switch 42. The dryer switch 42 and the dryer 33 are installed in the refrigeration unit 40. The dryer switch 42 detects whether there is a coolant in the dryer 33 and short-circuits it if there is no coolant. This is to prevent the compressor 31 from being overwhelmed when the refrigeration cycle is driven when there is no refrigerant.

Dryer switch 42 is also electrically connected to the fan motor 44 installed in the condenser 32, the fan motor 44 serves to dissipate the heat of condensation of the condenser 32.

In addition, the route passing through the fan motor 44 is connected to the clutch 46. The clutch 46 serves to mechanically connect or release the compressor 31 and the DC motor 45. That is, when electric power transmitted through the fan motor 44 is supplied to the clutch 46, the DC motor 45 and the compressor 31 are mechanically connected.

In summary, since the power switch 21 is turned on and the temperature sensed by the sensor 36 is outside the temperature set by the temperature control switch 23, there is a need for driving a refrigeration cycle, and the dryer switch 42 In the case of a short circuit, a circuit is connected and electricity is supplied from the refrigerator battery 41 to the fan motor 44 and the clutch 46. Therefore, the fan motor 44 is rotated and the clutch 46 is set as a preparation step for driving the refrigeration cycle by mechanically connecting the compressor 31 and the DC motor 45.

The clutch 46 is also electrically connected to the relay 43 to supply electricity to the relay 43 with the clutch 46 mechanically connecting the compressor 31 and the DC motor 45.

When electricity is supplied to the relay 43, relatively high power is supplied from the right line of the refrigerator battery 41 to the DC motor 45 through the relay 43. This causes the DC motor 45 to rotate. As described above, since the DC motor 45 and the compressor 31 are connected through the clutch 46, the compressor 31 is rotated by the DC motor 45. Done.

In another embodiment, the DC motor 45 and the compressor 31 are not separately connected to each other via the clutch 46, and the compressor and the drive unit (DC motor) are placed together in the hermetic compressor to be electrically controlled. It is also possible to obtain the same effects as in the above embodiment.

In the above, the electric circuit and the mechanical configuration are mainly examined, and the refrigeration cycle is considered in the following.

The refrigerating unit 40 is provided with a compressor 31, a condenser 32, a dryer 33, and an accumulator 34, and an evaporator 35 is installed in the freezing chamber 30. The refrigerant circulates in the order of the compressor 31, the condenser 32, the dryer 33, the accumulator 34, and the evaporator 35. The principle and operation of such a refrigeration cycle are obvious to those skilled in the art, and thus descriptions thereof will be omitted.

The refrigeration unit 40 is installed detachably to the refrigeration tower. In this case, in order to attach and detach, it is necessary to connect or disconnect a portion electrically connected to the freezing compartment 30, the cab 20, the engine compartment 10, and a portion where the refrigerant circulation pipe is connected. Well known methods of electrical connection and disconnection may be used, such as plugs and jacks.

In addition, in order to connect and disconnect the refrigerant cycle, the valve 49 is installed in the refrigerant passage of the refrigerating unit 40. The valve 49 is installed at the part connected to the evaporator 35 side from the accumulator 34 and the part connected to the compressor 31 at the evaporator 35.

When the refrigerating unit 40 is installed, both valves 49 are opened to allow the refrigerant to circulate, and when the refrigeration unit 40 is to be disassembled, the valve 49 between the accumulator 34 and the evaporator 35 is removed. In the state in which the remaining valve 49 is opened and the compressor 31 is driven to store all the refrigerant in the accumulator 34 and when the storage is completed, the remaining valve 49 is closed to complete the refrigerant storage operation.

When the refrigerant storage operation is completed and the connection between the refrigerant between the freezer compartment 30 and the refrigeration unit 40 is released, the refrigeration unit 40 can be dismantled from the freezer truck to be transported or maintained.

1 is a block diagram showing a refrigeration apparatus for a refrigeration tower according to the present invention.

Figure 2 is a block diagram showing a refrigeration apparatus for a refrigeration tower according to the prior art.

Claims (6)

An automobile engine and a generator driven by the engine; A refrigerator battery for storing electric power produced by the generator; A DC motor driven by using the power of the refrigerator battery; Includes; a refrigeration cycle including a compressor driven through the DC motor, The cab is equipped with a power switch for the operator to operate, A clutch for mechanically connecting or disconnecting the DC motor and the compressor according to an electrical input value, In the refrigerator battery, power is supplied through a line for applying the electric input to the clutch through the power switch and a line for driving the DC motor through a relay. The clutch and the relay are electrically connected, and when the electric input is applied to the clutch, the DC motor and the compressor are mechanically connected, and the relay electrically connects the refrigerator battery and the DC motor to the DC motor. Refrigerating apparatus for a refrigeration tower characterized in that the compressor is driven by. The method of claim 1, Refrigerating apparatus for a refrigeration tower vehicle, characterized in that it further comprises a charger for supplying external power to the refrigerator battery. delete The method of claim 1, The refrigerator battery, the relay, the DC motor, the clutch, the compressor is a refrigeration unit for refrigerating vehicle, characterized in that the refrigerating unit can be detachably installed in the refrigeration truck. The method of claim 4, wherein The refrigeration cycle and the compressor Refrigerating apparatus for a freezer tower, characterized in that the evaporator is installed in the freezing compartment connected to the refrigerant pipe. The method of claim 5, wherein The refrigeration unit includes an accumulator, And a valve is installed in the refrigerant pipe connecting the freezing unit and the freezing chamber to open and close the valve so that the freezing unit can be separated from the freezing truck without leakage of refrigerant.

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