JP2000043560A - Vehicle refrigerating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle refrigerating device to generate the operation power for an apparatus except a compressor from other than a vehicle battery source and besides independently and differently from a power for compressor drive and be regulatable to an optimum air supply amount matched with a change of a cooling load in a refrigerator. SOLUTION: This vehicle refrigerating device comprises a generator 6 driven by the engine 2 of a vehicle 1; and a source circuit 10 to convert the output of the generator 6 into a direct current, which is converted into an AC of a given frequency, and a compressor 31 is operated by the output of the source circuit 10. The so formed vehicle refrigerating device is provided with DC regulating circuits 21, 22, 23, and 24 to regulate the conversion output of the source circuit 10 to a DC voltage of a given level, which is outputted as a power for operation of an apparatus except the compressor 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration system for a vehicle having a generator driven by an engine of a vehicle and operating a compressor by the output of the generator.

[0002]

2. Description of the Related Art A generator driven by an engine of a vehicle, and a power supply circuit for converting the output of the generator into a direct current and converting it into an alternating current having a predetermined frequency, are used to operate a compressor by the output of the power supply circuit. There is a vehicle refrigeration system.

[0003] A refrigerator (container) for storing foods and the like is loaded on a cargo bed of a vehicle, and the output frequency of a power supply circuit is controlled according to the temperature (cooling load) in the refrigerator. By this control, the rotation speed, that is, the capacity of the compressor changes, and the temperature in the refrigerator is set to a state suitable for refrigeration and transportation of foods and the like. The vehicle refrigeration system includes a blower as a main device other than the compressor, and the operating power of the blower is obtained from a vehicle battery power supply.

[0004]

When the operating power of the blower is taken from the battery power supply for the vehicle, the input power to the blower is constant, so that an optimum amount of air can be obtained in accordance with a change in the cooling load in the refrigerator. Absent.

[0005] It is conceivable that the power for driving the compressor output from the power supply circuit is also used for driving the blower. However, in this case, the air volume of the blower changes directly following the change in the capacity of the compressor. It is not possible to independently adjust the amount of air to be blown, and similarly to the above, it is not possible to obtain an optimum amount of air to match the change in the cooling load in the refrigerator.

[0006] Obtaining the operating power of equipment other than the compressor from the vehicle battery power supply itself has the problem of enlarging the vehicle battery power source and increasing the size of the vehicle power generator (so-called dynamo).

[0007] The present invention has been made in view of the above circumstances,
The purpose is to obtain the operating power of the equipment other than the compressor from power other than the vehicle battery power supply and independently of the power for driving the compressor, thereby reducing the change in the cooling load in the refrigerator. An object of the present invention is to provide a highly reliable vehicle refrigeration apparatus capable of adjusting an optimum air flow rate.

[0008]

According to a first aspect of the present invention, there is provided a vehicular refrigeration apparatus comprising: a generator driven by an engine of a vehicle; and a DC converter for converting the output of the generator into an AC having a predetermined frequency. In a vehicle refrigeration apparatus that includes a power supply circuit for operating a compressor by an output of the power supply circuit,
A DC adjustment circuit is provided for adjusting the DC conversion output of the power supply circuit to a DC voltage of a predetermined level and outputting the adjusted DC voltage for operation of equipment other than the compressor.

According to a second aspect of the present invention, there is provided a vehicle refrigeration system.
In the invention according to claim 1, a plurality of DC adjustment circuits are provided. The refrigeration system for a vehicle according to the third aspect of the present invention is the vehicle refrigeration cycle according to the first aspect, further comprising: a refrigeration cycle for communicating a compressor, a condenser, a decompressor, and an evaporator to circulate the refrigerant; And a blower for a condenser that operates by an output.

According to a fourth aspect of the present invention, there is provided a vehicle refrigeration apparatus.
The invention according to claim 1 further includes a refrigeration cycle that circulates the refrigerant by communicating the compressor, the condenser, the decompressor, and the evaporator, and a blower for the evaporator that operates by an output of the DC adjustment circuit.

According to a fifth aspect of the present invention, there is provided a vehicle refrigeration apparatus comprising:
The invention according to claim 1 further operates by a refrigeration cycle that circulates a refrigerant by communicating with a compressor, a condenser, a decompressor, and an evaporator, a drain plate that receives a drain of the evaporator, and an output of a DC regulating circuit. A defrost heater for removing frost adhering to the drain pan.

According to a sixth aspect of the present invention, there is provided a vehicle refrigeration system comprising:
The invention according to claim 1 further includes a refrigeration cycle that circulates the refrigerant by communicating the compressor, the condenser, the decompressor, and the evaporator, and a dew-proof heater that operates by an output of the DC adjustment circuit.

According to a seventh aspect of the present invention, there is provided a vehicle refrigeration system comprising:
The invention according to claim 1 further includes a controller that operates by the output of the DC adjustment circuit and controls the output frequency of the power supply circuit according to the temperature in the vehicle garage.

The refrigeration system for a vehicle according to the invention according to claim 8 is:
A generator driven by the engine of the vehicle, and a plurality of inverters that convert the output of the generator into DC and convert it into AC having a predetermined frequency, and operate the compressor and other devices by the output of each inverter. .

According to a ninth aspect of the present invention, there is provided a vehicle refrigeration system.
In the invention according to claim 8, the output voltage of each inverter is variable. According to a tenth aspect of the present invention, there is provided the vehicle refrigeration apparatus according to the eighth aspect, further comprising: a refrigeration cycle for communicating a compressor, a condenser, a decompressor, and an evaporator to circulate a refrigerant; And a blower for a condenser operated by two outputs.

According to an eleventh aspect of the present invention, there is provided the vehicle refrigeration apparatus according to the eighth aspect, further comprising: a refrigeration cycle for circulating a refrigerant by communicating with a compressor, a condenser, a decompressor, and an evaporator; An evaporator blower operated by one output of the inverter.

The refrigeration system for a vehicle according to the twelfth aspect of the present invention is the vehicle refrigeration apparatus according to the eighth aspect, further comprising a refrigeration cycle for circulating a refrigerant through a compressor, a condenser, a decompressor, and an evaporator; A drain plate for receiving the drain of the vessel, and a defrost heater which is operated by one output of each inverter and removes frost adhering to the drain plate.

According to a thirteenth aspect of the present invention, there is provided the vehicle refrigeration apparatus according to the eighth aspect, further comprising: a refrigeration cycle for circulating a refrigerant by communicating with a compressor, a condenser, a decompressor, and an evaporator; And an anti-condensation heater operated by one output of the inverter.

[0019]

[1] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In FIG. 1, 1
Is a refrigerating vehicle, which has an engine 2 as a power source. A pulley 3 is provided on an output shaft of the engine 2, and the rotation of the pulley 3 is transmitted to a rotating shaft of a generator 6 via a belt 4 and a pulley 5. The rotor 6 a in the generator 6 is rotated by the output of the engine 2, and the generator 6 generates AC power.

The output of the generator 6 is supplied to a power supply circuit 10. The power supply circuit 10 converts an output voltage of the generator 6 into a DC voltage once by an AC-DC converter (AC-DC) 11, and then converts the output voltage to a predetermined frequency (and a DC-AC) 12 by a DC-AC converter (DC-AC) 12. (Predetermined level). The output of the power supply circuit 10 is supplied to the compressor 31 as drive power.

A condenser 32 is connected to a refrigerant discharge port of the compressor 31 by piping, and an evaporator 36 is connected to the condenser 32 via a liquid receiver 34 and a decompressor, for example, an expansion valve 35.
Further, the refrigerant suction port of the compressor 31 is connected to the evaporator 36 by piping. The piping connection forms a refrigeration cycle.

That is, the refrigerant discharged from the compressor 31 passes through the condenser 32, the liquid receiver 34, the expansion valve 35, and the evaporator 36, and returns to the compressor 31. By this refrigerant circulation, the air in the refrigerator in which the evaporator 36 is installed is cooled.

A condenser blower 33 is provided near the condenser 32. The condenser blower 33 supplies outside air to the condenser 32. An evaporator blower 37 is provided near the evaporator 36. The evaporator blower 37 circulates the air in the refrigerator installed on the bed of the vehicle 1 through the evaporator 36.
An internal temperature sensor 38 is provided in a suction air path of the evaporator blower 37.

A drain plate 39 is provided below the evaporator 36,
The defrost heater 41 is attached to the drain plate 39. The defrost heater 41 is for removing frost adhering to the drain plate 39. Further, a dew-proof heater 4 is provided near the evaporator 36.
2 is provided. The dew-proof heater 42 is for preventing dew condensation on the casing of the cooling unit (not shown) in which the evaporator 36 is housed.

The power supply circuit 10 includes a voltage adjustment circuit 2
1, 22, 23 and 24 are provided. These voltage adjustment circuits adjust the DC conversion output of the power supply circuit 10, that is, the output voltage (DC voltage) of the AC-DC converter 11, to a predetermined level,
It is output for operation of the equipment except the compressor 31.

The output voltage of the voltage adjusting circuit 21 is supplied to a condenser blower 33. The output voltage of the voltage adjustment circuit 22 is supplied to the evaporator blower 37. The output voltage of the voltage adjustment circuit 23 is supplied to the controller 50. Voltage adjustment circuit 24
Is supplied to the defrost heater 41 and the dew prevention heater 42.

The voltage adjusting method of each voltage adjusting circuit may be any of a pulse method, a voltage dividing method, and other methods. The controller 50 performs overall control of the vehicle refrigeration system. This controller 50
, The DC-AC converter 12 of the power supply circuit 10 is connected, and the internal temperature sensor 38 is connected. The controller 50 has a display 51 for displaying the temperature detected by the internal temperature sensor 38.

Next, the operation of the above configuration will be described. When the engine 2 is operated, the motive power drives the generator 6, and the generator 6 generates AC power. The output of the generator 6 is converted into an AC voltage of a predetermined frequency by the power supply circuit 10 and supplied to the compressor 31. Thus, the compressor 31 is driven to cool the inside of the refrigerator.

The temperature inside the refrigerator is detected by a temperature sensor 38 inside the refrigerator, and the output frequency of the power supply circuit 10 is controlled in accordance with the difference (cooling load) between the detected temperature and a predetermined set temperature. With this control, the rotation speed, that is, the capacity of the compressor 31 is changed, and the temperature in the refrigerator is set to a state suitable for refrigeration and transportation of foods and the like.

In the power supply circuit 10, the output voltage of the generator 6 is once converted into a DC voltage by an AC-DC converter 11, and is converted into an AC voltage of a predetermined frequency (and a predetermined level) by a DC-AC converter 12. are doing. The output voltage (DC voltage) of the AC-DC converter 11 is adjusted by the voltage adjustment circuit 2
The pressure is adjusted to a predetermined level at 1, 22, 23, and 24, and the blower 33 for the condenser, the blower 37 for the evaporator, the controller 50,
The electric power is supplied to the defrost heater 41 and the dew-proof heater 42 as operating power.

As described above, the operating power of the condenser blower 33, the evaporator blower 37, the defrost heater 41, and the dew-prevention heater 42 is obtained from a power source other than the battery power source mounted on the vehicle. (So-called dynamo) can be prevented from becoming large.

In addition, the operating power of the condenser blower 33, the evaporator blower 37, the defrost heater 41, and the dew-proof heater 42 is obtained independently of the drive power of the compressor 31.
The amount of air blown and the amount of heat generated by the heater can be adjusted independently.
In particular, the air volume can be set optimally in accordance with the change in the cooling load in the refrigerator.

[2] A second embodiment of the present invention will be described. As shown in FIG. 2, the output of the generator 6 is supplied to a plurality of inverters 61, 62, 63, 64, 65. These inverters once convert the output voltage of the generator 6 into a DC voltage, and then convert it into an AC voltage having a predetermined frequency and a predetermined level (the output voltage is variable) and output the AC voltage.

The output voltage of the inverter 61 is supplied to the condenser blower 33. The output voltage of the inverter 62 is supplied to the compressor 31. The output voltage of the inverter 63 is supplied to the evaporator blower 37. The output voltage of the inverter 64 is supplied to the defrost heater 41. The output voltage of the inverter 65 is supplied to the dew-proof heater 42.

The other structure is the same as that of the first embodiment. FIG.
Here, the description of the in-compartment temperature sensor 38 and the controller 50 is omitted. The operation will be described.

When the engine 2 is operated, the generator 6 is driven by the motive power, and the generator 6 generates AC power. The output of the generator 6 is connected to inverters 61, 62, 6
3, 64, and 65 convert the voltage into an AC voltage having a predetermined frequency and a predetermined level, respectively.
1. Supply to the evaporator blower 37, the defrost heater 41, and the dew-proof heater 42. Thereby, a refrigeration operation is performed.

The temperature inside the refrigerator is detected by a temperature sensor 38 inside the refrigerator, and the output frequency of the inverter 62 is controlled in accordance with the difference (cooling load) between the detected temperature and a predetermined set temperature. With this control, the rotation speed, that is, the capacity of the compressor 31 is changed, and the temperature in the refrigerator is set to a state suitable for refrigeration and transportation of foods and the like.

Further, inverters 61, 63, 64, 6
5 is adjusted to a predetermined level, and the blower 33 for the condenser, the blower 37 for the evaporator,
2. The operating power is supplied to the defrost heater 41.

As described above, the operating power of the condenser blower 33, the evaporator blower 37, the defrost heater 41, and the dew-prevention heater 42 is obtained from a battery power source other than the vehicle-mounted battery power source. (So-called dynamo) can be prevented from becoming large.

Moreover, the operating power of the condenser blower 33, the evaporator blower 37, the defrost heater 41, and the dew prevention heater 42 can be obtained independently of the drive power of the compressor 31.
The amount of air blown and the amount of heat generated by the heater can be adjusted independently.
In particular, the air volume can be set optimally in accordance with the change in the cooling load in the refrigerator.

[3] In each of the above embodiments, the output of the engine 2 is transmitted to the generator 6 through the pulley 3, the belt 4, and the pulley 5, but as shown in FIG. A configuration may be adopted in which a pulley 43 is attached to a propeller shaft 41 for transmitting the output to the driving wheels of the vehicle 1, and the rotation of the pulley 43 is transmitted to the rotation shaft of the generator 6 via the belt 44 and the pulley 45. .

The generator 6 is detachably attached to the refrigerator (container) 1a or the bed of the vehicle 1 by a bracket 47. In addition, an auxiliary pulley 48 is attached to the rotating shaft of the generator 6, and the generator 6 can be driven by receiving external power with the auxiliary pulley 48.

According to such a configuration, since the generator 6 and the configuration related to its driving exist outside the engine room, and the generator 6 is detachable, maintenance and inspection are facilitated.

The configuration may be such that the rotation of a gear interposed between the drive wheels of the vehicle 1 and the propeller shaft 41 is transmitted to the rotating shaft of the generator 6. In addition, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention.

[0045]

As described above, according to the present invention, there is provided a generator driven by an engine of a vehicle, and a power supply circuit for converting the output of the generator into a direct current and converting it into an alternating current having a predetermined frequency. In a vehicular refrigeration apparatus that operates the compressor 1 by an output of a power supply circuit, a DC adjustment circuit that adjusts a DC conversion output of the power supply circuit to a DC voltage of a predetermined level and outputs the same for operation of equipment other than the compressor is provided. Therefore, the operating power of the equipment except the compressor can be obtained from a power source other than the battery power supply for the vehicle and independently of the power for driving the compressor, whereby the optimum power for changing the cooling load in the refrigerator can be obtained. A highly reliable vehicle refrigeration apparatus capable of adjusting the amount of air to be blown and the like can be provided.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a first embodiment.

FIG. 2 is a diagram showing a configuration of a second embodiment.

FIG. 3 is a diagram showing a configuration of a modification of each embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Vehicle 2 ... Engine 3, 5 ... Pulley 4 ... Belt 6 ... Generator 10 ... Power supply circuit 11 ... AC-DC converter (AC-DC) 12 ... DC-AC converter (DC-AC) 31 ... Compressor 32 ... condenser 33 ... condenser blower 36 ... evaporator 37 ... evaporator blower 50 ... controller

Claims (13)

[Claims] 1. A generator driven by an engine of a vehicle, and a power supply circuit for converting the output of the generator into a direct current and converting it into an alternating current of a predetermined frequency, and operating the compressor by the output of the power supply circuit. A vehicle refrigeration system, comprising: a DC adjustment circuit that adjusts a DC conversion output of the power supply circuit to a DC voltage of a predetermined level and outputs the adjusted DC voltage for operation of equipment other than the compressor. apparatus. 2. The refrigeration system for a vehicle according to claim 1, wherein a plurality of said DC adjustment circuits are provided. 3. The refrigeration system for a vehicle according to claim 1, wherein the refrigeration cycle communicates with the compressor, the condenser, the decompressor, and the evaporator to circulate the refrigerant, and the condenser operates by an output of the DC regulating circuit. A refrigeration system for vehicles, comprising: a dexterous blower. 4. The refrigeration system for a vehicle according to claim 1, wherein the refrigeration cycle communicates with the compressor, the condenser, the decompressor, and the evaporator to circulate a refrigerant, and the evaporator operates by an output of the DC regulation circuit. A refrigeration system for vehicles, comprising: a dexterous blower. 5. The refrigeration system for a vehicle according to claim 1, wherein the refrigeration cycle communicates with the compressor, the condenser, the decompressor, and the evaporator to circulate a refrigerant; and a drain plate that receives the drain of the evaporator. A refrigeration system for vehicles, comprising: a defrost heater that operates by an output of the DC adjustment circuit and removes frost adhering to the drain pan. 6. The refrigeration system for a vehicle according to claim 1, wherein the refrigeration cycle communicates with the compressor, the condenser, the decompressor, and the evaporator to circulate the refrigerant, and the refrigeration cycle operates by an output of the DC adjustment circuit. A refrigeration system for a vehicle, comprising: a dew heater; 7. The vehicle refrigeration system according to claim 1, further comprising a controller that operates by an output of the DC adjustment circuit and controls an output frequency of the power supply circuit in accordance with a cooling load. Refrigeration equipment. 8. A generator driven by an engine of a vehicle, and a plurality of inverters for converting the output of the generator into DC and converting the output into AC having a predetermined frequency. And a vehicle refrigeration apparatus for operating other equipment. 9. The vehicle refrigeration system according to claim 8, wherein each of said inverters has a variable output voltage. 10. The refrigeration system for a vehicle according to claim 8, wherein the refrigeration cycle communicates with the compressor, the condenser, the decompressor, and the evaporator to circulate a refrigerant, and is operated by one output of each of the inverters. A refrigerator for a vehicle, comprising: a blower for a condenser. 11. The refrigeration system for a vehicle according to claim 8, wherein the refrigeration cycle communicates with the compressor, the condenser, the decompressor, and the evaporator to circulate a refrigerant, and operates by one output of each of the inverters. A refrigerator for a vehicle, comprising: a blower for an evaporator; 12. The refrigeration system for a vehicle according to claim 8, wherein the refrigeration cycle communicates with the compressor, the condenser, the decompressor, and the evaporator to circulate a refrigerant; and a drain plate that receives the drain of the evaporator. A refrigeration system for a vehicle, comprising: a defrost heater that is operated by one output of each of the inverters and removes frost adhering to the drain pan. 13. The refrigeration system for a vehicle according to claim 8, wherein the refrigeration cycle communicates with the compressor, the condenser, the decompressor, and the evaporator to circulate a refrigerant, and operates by one output of each of the inverters. A refrigeration system for vehicles, comprising: a dew-proof heater;