Motor-driven refrigerating apparatus for vehicle

A vehicle system for a vehicle, which has an engine for driving the vehicle and additional equipment including an air-conditioning apparatus, wherein the air-conditioning apparatus is operated not only in a period in which the engine is operated but also in a period in which engine operation is stopped, and wherein the vehicle system comprises:

• a standard low-voltage electric load operated with low-voltage electric power;
• a standard low-voltage battery for supplying its low-voltage electric power to the standard low-voltage electric load;
• and
• a low-voltage power generator driven by the engine and supplying its generated low-voltage electric power to the standard low-voltage battery,
• wherein the air-conditioning apparatus comprises;
• an additional low-voltage electric load operated with low-voltage electric power;
• a motor-driven compressor operated with high-voltage electric power, voltage of which is higher than that of the low-voltage electric power;
• an additional low-voltage battery for supplying its low-voltage electric power to the additional low-voltage electric load;
• a high-voltage battery for supplying its high-voltage electric power to the motor-driven compressor;
• a converter for converting low-voltage electric power to high-voltage electric power, wherein an input side of the converter is operatively connected to the standard low-voltage battery and/or the additional low-voltage battery, while an output side of the converter is connected to the high-voltage battery and the motor-driven compressor, so that the electric power from the standard low-voltage battery and/or the additional low-voltage battery is converted to the high-voltage electric power to be supplied to the high-voltage battery and the motor-driven compressor;
• a first switching device provided between the standard low-voltage battery and the additional low-voltage battery;
• and
• a second switching device provided between the standard low-voltage battery and the converter,
• wherein the first and second switching devices are closed during the period in which the engine is operated, so that the electric power is supplied from the standard low-voltage battery and/or the additional low-voltage battery to the converter and converted by the converter to the high-voltage electric power, and
• wherein the first and second switching devices are opened during the period in which the engine operation is stopped, so that the motor-driven compressor is operated with the electric power from the high-voltage battery.

A vehicle system for a vehicle, which has an engine for driving the vehicle and additional equipment including an air-conditioning apparatus, wherein the air-conditioning apparatus is operated not only in a period in which the engine is operated but also in a period in which engine operation is stopped, and wherein the vehicle system comprises:

• a standard low-voltage electric load operated with low-voltage electric power;
• a standard low-voltage battery for supplying its low-voltage electric power to the standard low-voltage electric load;
• and
• a low-voltage power generator driven by the engine and supplying its generated low-voltage electric power to the standard low-voltage battery,
• wherein the air-conditioning apparatus comprises;
• an additional low-voltage electric load connected to the standard low-voltage battery and operated with low-voltage electric power;
• a motor-driven compressor operated with high-voltage electric power, voltage of which is higher than that of the low-voltage electric power;
• a high-voltage battery for supplying its high-voltage electric power to the motor-driven compressor;
• a converter for converting low-voltage electric power to high-voltage electric power, wherein an input side of the converter is operatively connected to the standard low-voltage battery and/or the low-voltage power generator, while an output side of the converter is connected to the high-voltage battery and the motor-driven compressor, so that the electric power from the standard low-voltage battery is converted to the high-voltage electric power to be supplied to the high-voltage battery and the motor-driven compressor;
• a switching device provided between the standard low-voltage battery and the converter,
• wherein the switching device is closed during the period in which the engine is operated, so that the low-voltage electric power from the standard low-voltage battery and/or the low-voltage power generator is supplied to the converter and converted by the converter to the high-voltage electric power, and
• wherein the switching device is opened during the period in which the engine operation is stopped, so that the motor-driven compressor is operated with the electric power only from the high-voltage battery.

A vehicle system for a vehicle, which has an engine for driving the vehicle and additional equipment including an air-conditioning apparatus, wherein the air-conditioning apparatus is operated not only in a period in which the engine is operated but also in a period in which engine operation is stopped, and wherein the vehicle system comprises:

• a standard low-voltage electric load operated with low-voltage electric power;
• a standard low-voltage battery for supplying its low-voltage electric power to the standard low-voltage electric load;
• and
• a low-voltage power generator driven by the engine and supplying its generated low-voltage electric power to the standard low-voltage battery,
• wherein the air-conditioning apparatus comprises;
• a high-voltage power generator driven by the engine for generating high-voltage electric power;
• an additional low-voltage electric load connected to the standard low-voltage battery and operated with low-voltage electric power;
• a motor-driven compressor operated with high-voltage electric power, voltage of which is higher than that of the low-voltage electric power;
• a high-voltage battery for supplying its high-voltage electric power to the motor-driven compressor;
• a switching device provided between the high-voltage power generator and the motor-driven compressor;
• wherein the switching device is closed during the period in which the engine is operated, so that the high-voltage electric power generated at the high-voltage power generator is supplied to the motor-driven compressor, and
• wherein the switching device is opened during the period in which the engine operation is stopped, so that the motor-driven compressor is operated with the electric power only from the high-voltage battery.

A vehicle system for a vehicle, which has an engine for driving the vehicle and additional equipment including an air-conditioning apparatus, wherein the air-conditioning apparatus is operated not only in a period in which the engine is operated but also in a period in which engine operation is stopped, and wherein the vehicle system comprises:

• a standard low-voltage electric load operated with low-voltage electric power;
• a standard low-voltage battery for supplying its low-voltage electric power to the standard low-voltage electric load;
• and
• a low-voltage power generator driven by the engine and supplying its generated low-voltage electric power to the standard low-voltage battery,
• wherein the air-conditioning apparatus comprises;
• an additional low-voltage electric load operated with low-voltage electric power;
• an additional low-voltage battery for supplying its low-voltage electric power to the additional low-voltage electric load;
• a first switching device provided between the low-voltage power generator as well as the standard low-voltage battery and the additional low-voltage battery;
• a high-voltage power generator driven by the engine for generating high-voltage electric power;
• a motor-driven compressor operated with high-voltage electric power, voltage of which is higher than that of the low-voltage electric power;
• a high-voltage battery for supplying its high-voltage electric power to the motor-driven compressor;
• a second switching device provided between the high-voltage power generator and the motor-driven compressor;
• wherein the second switching device is closed during the period in which the engine is operated, so that the high-voltage electric power generated at the high-voltage power generator is supplied to the motor-driven compressor, and
• wherein the second switching device is opened during the period in which the engine operation is stopped, so that the motor-driven compressor is operated with the electric power only from the high-voltage battery.