WO2009119985A2

WO2009119985A2 - Refrigerating device for refrigerated truck

Info

Publication number: WO2009119985A2
Application number: PCT/KR2009/001279
Authority: WO
Inventors: 이형주
Original assignee: 씨앤에프공업 주식회사
Priority date: 2008-03-24
Filing date: 2009-03-16
Publication date: 2009-10-01
Also published as: KR100841257B1; WO2009119985A3

Abstract

The invention relates to a refrigerating device for a refrigerated truck that includes a generator operated by an engine of the refrigerated truck, a refrigerator battery for storing power generated by the generator, a DC motor electrically connected to the refrigerator battery through a relay, a refrigerating cycle having a compressor operated by the DC motor, a power switch arranged in an operating chamber so as to be operated by an operator, and a speed reducer connected to the refrigerator battery through the power switch, and which mechanically connects the DC motor and the compressor when electrically connected to the refrigerator battery. The speed reducer and the relay are electrically connected to each other such that the relay electrically connects the refrigerator battery and the DC motor when the speed reducer is electrically connected to the refrigerator battery so as to operate the compressor via the DC motor.

Description

Refrigeration equipment for refrigeration tower

The present invention relates to a refrigerating device installed in a freezing tower for transporting cold storage food.

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 tube in the order of the compressor, the condenser, and the evaporator. 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 the cooling cycle as described above is used, the engine and the compressor are directly connected to each other, so even if the driver parks the freezer truck and leaves the seat for a while, the engine must be kept on and the energy is wasted. There was a problem.

The present application is to solve this problem and further to be able to drive to the indoor air conditioning of the vehicle

The present invention provides a refrigeration apparatus for a refrigeration tower for charging a battery by using a generator that is generated by the power of the engine without directly connecting the engine and the compressor and driving the compressor by using the energy charged in the battery.

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 reducer and 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, even if the driver parks the freezer truck and leaves the seat for a while, the engine can be turned off, thereby preventing waste of energy and preventing the engine from being overwhelmed.

In addition, since the refrigeration unit is configured as a unit, it is convenient to transport, maintain, etc., and when the refrigeration function is not required, the refrigeration unit can be separated for a predetermined period and the refrigeration tower vehicle can be operated.

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

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

2 is a block diagram showing a refrigeration apparatus for a refrigeration tower according to another embodiment of the present invention.

Figure 3 is a block diagram showing a refrigeration apparatus for a refrigeration tower according to the prior art.

※ Explanation of code about main part of drawing ※

10: engine compartment 11: engine

13: generator 15: main battery

20: cab 21: power switch

23: temperature control switch 30: freezer

31 compressor 32 condenser

40: refrigeration unit 41: refrigerator battery

45: DC motor 46: reducer

47: charger

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, electric power is produced by the generator 13. The generated power 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. The power produced by the generator 13 is supplied to the refrigerator battery 41 as described above to charge the refrigerator battery first, and then to the main battery 15 when the charging is completed. The main battery 15 and the refrigerator battery 41 store 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 is an upper power path extending upward and a right power path extending rightward based on the refrigerator battery 41 of FIG. 1.

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

The upper power path 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 is input from the sensor 36, the refrigeration cycle is driven. will be.

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 upper power path passing through the fan motor 44 is connected to the speed reducer 46. The reducer 46 mechanically connects the compressor 31 and the DC motor 45 as an assembly of a predetermined gear and at the same time serves to adjust the rotation rate. That is, when the DC motor 45 operates while the DC motor 45 and the compressor 31 are connected through the reducer 46, the DC motor 45 and the DC motor 45 may be rotated at a predetermined ratio, for example, 10: 5. The compressor 31 rotates together.

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 electric power is supplied from the refrigerator battery 41 to the fan motor 44 and the reducer 46. Therefore, the fan motor 44 rotates and the reduction gear 46 is set as a preparation step for driving the refrigeration cycle in a state in which the compressor 31 and the DC motor 45 are mechanically connected.

The reducer 46 is also electrically connected to the relay 43 so that current is supplied to the relay 43 with the reducer 46 mechanically connecting the compressor 31 and the DC motor 45.

When a current is supplied to the relay 43, relatively high power is supplied from the right power mirror 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 to each other through the reducer 46, the compressor 31 is rotated by the DC motor 45. Done.

On the other hand, the refrigerator battery, the evaporator, the condenser may be provided with a diode for preventing the reverse flow of the current. This is because a reverse flow current can occur if the power supply stops, causing the device to malfunction.

In addition, a battery volt meter may be provided in the power switch 21 to maintain the DC current at a constant water level. For example, if your power supply needs to maintain 12 volts and falls below 11 volts, try to shut it off to prevent battery drain.

In addition, the relay 43 may be configured to be electrically connected to the power switch 21 without passing through the speed reducer 46 to implement the present invention.

Figure 2 is a block diagram showing a refrigeration unit for both air conditioning refrigeration tower according to another embodiment of the present invention.

According to another embodiment of the present invention, the coupling 50 is replaced in each of the portions connected to the evaporator 35, that is, in one embodiment, the valve 49 is connected, and the gas supply portion is provided in the coupling 50. By connecting the 51 to the refrigerant generated in the air conditioning of the refrigeration tower vehicle can be supplied directly to the compressor (31). In this way, the refrigeration cycle can also be operated by the air conditioner of the vehicle boarding unit.

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. Meanwhile, according to another embodiment of the present invention, the coupling 50 is connected to the gas supply unit 51 for supplying the refrigerant instead of the valve 49.

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.

Claims

A generator driven by an engine of the refrigerator vehicle, a refrigerator battery storing power generated by the generator, a DC motor electrically connected to the refrigerator battery through a relay, and a compressor driven by the DC motor. The DC motor and the compressor when connected to the refrigerator battery through a refrigeration cycle, a power switch installed in the cab for operation by the driver, and the power switch and electrically connected to the refrigerator battery by the operation of the power switch. It includes a reducer for mechanically connecting the;

The reducer and the relay are electrically connected so that the relay electrically connects the refrigerator battery and the DC motor so that the compressor is driven by the DC motor when the reducer is electrically connected to the refrigerator battery. Refrigerating device for refrigeration tower.
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.
The method of claim 1,

Refrigerating apparatus for a refrigerator vehicle, characterized in that the refrigerator battery is electrically connected to the diode for preventing the reverse flow of current.
The method of claim 3,

The refrigerator battery, the relay, the DC motor, the reducer and the compressor is a refrigeration unit, characterized in that the refrigeration unit can be installed detachably to the refrigeration truck.
The method of claim 1,

And a gas supply unit for supplying the refrigerant generated in the air conditioner of the refrigeration tower to the compressor.