US 2002/0157414 A1 · Air-conditioning apparatus including motor-driven compressor for idle stopping vehicles

Abstract

A low-cost vehicle air-conditioning apparatus for idle stopping vehicles is capable of performing both cooling and heating operations throughout the year. The air-conditioning apparatus includes an engine-driven compressor and engine-driven pump for a heating unit. The air-conditioning apparatus includes a motor-driven compressor and pump. A control unit drives the motor such that the motor-driven compressor is operated when there is a need for cooling and the motor-driven pump is operated when there is a need for heating when the engine is stopped. Battery power is conserved through various methods.

Claims64

Dependent claims

A vehicle air-conditioning apparatus for use in a vehicle in which an engine for driving the vehicle is stopped when the vehicle comes to a temporary halt from a running state, the apparatus comprising:

a cooling unit for cooling air by compressing a refrigerant with a compressor, which is driven by torque from the engine, condensing the compressed refrigerant, expanding the condensed refrigerant, and evaporating the expanded refrigerant;
a heating unit for heating the air by using, as a heat source, cooling water circulated by a mechanical pump, which is driven by torque from the engine;
a compression unit for compressing the refrigerant;
a pump unit for circulating the cooling water;
a motor for driving both the compression unit and the pump unit;
and
a control unit for controlling operation of the motor, wherein the control unit causes the motor to operate the compression unit if the engine is stopped when the cooling unit is operating and causes the motor to operate the pump unit if the engine is stopped when the heating unit is operating.

4 more elements

A vehicle air-conditioning apparatus for use in a vehicle having an engine that is stopped when the vehicle comes to a temporary halt from a running state, the apparatus comprising:

An engine-driven apparatus, wherein the engine-driven apparatus is at least one of a cooling unit for cooling air by compressing a refrigerant with a compressor, which is driven by torque from the engine, and then subjecting the refrigerant to condensation, expansion, and evaporation, and a heating unit for heating air with engine cooling water as a heat source, wherein the cooling water is circulated by a mechanical pump powered by torque from the engine;
a battery-powered apparatus, wherein the battery-powered apparatus is driven by a motor, which is powered by a battery, and is a compressor unit for compressing the refrigerant if the engine driven apparatus is the cooling unit and is a pump unit for circulating the cooling water if the engine driven apparatus is the heating unit;
and
a control unit for controlling the operation of the motor, wherein the motor is driven by the control unit to operate the battery-powered apparatus when the engine comes to a stop, while the battery powered apparatus is in operation, wherein the control unit causes the motor to operate, while the engine is stopped, to maintain, within a predetermined range, an air-conditioning state produced by the engine-driven apparatus prior to the stoppage of the engine.

1 more element

Dependencies are inferred from the claim text.

Air-conditioning apparatus including motor-driven compressor for idle stopping vehicles

Life of this patent

Air-conditioning apparatus including motor-driven compressor for idle stopping vehicles

Life of this patent

Abstract

Claims64