| 摘要 |
PURPOSE:To make it possible to realize a comfortable heating of keeping the head cool and the foot warm to aim at saving energy and at simplifying the control system of the air-conditioning system, by providing such a heating system, other than a heat pump system, that a heating pump line disposed in the floor of a passenger's compartment is utilized as a condenser upon heating. CONSTITUTION:Upon cooling operation a forced convection type cooling cycle is carried out such that gas medium of high temperature and high pressure from a compressor 11 is condenced in a heat exchanger 10 and is led into a heat-exchanger 15 in which the medium is heat-exchanged with air in a passenger's compartment to be evaporated and from which it is returned into the compressor 11. Further, upon heating operation a floor heating unit and an external unit are operated to perform a heating cycle such that gas medium from the compressor 11 radiates heat from and condenses in a floor heating panel 20, and is then evaporated in the heat-exchanger 10 in the front face part of a vehicle, from which the medium returns into the compressor 11. Thus, upon heating operation a radiation type heating is mainly carried out from the floor surface, and therefore, it may provides a comfortability in bodily sensation even though the temperature of the passenger's compartment is relatively low, since the passengers are warmed from their feet, and it may also provide an energy saving operation. Further, since cooling and heating operations may be made by one and the same system so that their control system may be simplified. |
