Refrigeration – With vehicle feature – Occupant-type vehicle
Patent
1991-07-05
1993-06-22
Tapolcai, William E.
Refrigeration
With vehicle feature
Occupant-type vehicle
62DIG16, B60H 132
Patent
active
052208087
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to an air conditioning system for motor vehicles, in particular buses. Air conditioning systems of this type are known in several constructions and are described, for example, in the German patent specification 33 24 895.
With air conditioning systems of the last mentioned construction the condenser unit lies in the direction of travel in front of the evaporator unit. The tubes of the condenser heat exchanger extend transversely to the direction of travel and the front face of the condenser heat exchanger is inclined forwards in relation to a horizontal plane. A blower associated with the condenser heat exchanger sucks the air from a fresh air inlet in the front face through the heat exchanger of the condenser, and then gives it off upwards. In the direction of travel behind the condenser unit of the known air conditioning system, without any connection of the respective air flow paths, the evaporator unit operates in such a way that the circulating air drawn from the passenger compartment via the circulating air opening is passed through the tubular register of the heat exchanger of the evaporator unit, which register extends substantially along the direction of travel, and is pressed back into the passenger compartment by the blowers.
With known air conditioning systems of the type indicated in the foregoing, among others the fact that the operation of the evaporator unit is dependent on the construction and functioning ability of the ventilation and aeration of the passenger compartment provided in the motor vehicle in question is found to be a disadvantage, as the evaporator unit, especially if arranged in the direction of travel behind the condenser unit on the roof of the motor vehicle or the roof of the bus, cannot readily be reached by the fresh air inlet ducts without increasing the overall height and cross-section of the air conditioning system.
SUMMARY OF THE INVENTION
It is therefore an object of the invention to design an air conditioning system for motor vehicles, in particular buses, of the flat type for installation on the roof in such a way that at a minimum overall height and without widening or significant changes in the outline, an air conditioning treatment can take place of the fresh air to be fed into the passenger compartment independent of the ventilation and aeration systems or the air inlet and air outlet openings of the motor vehicle itself.
According to the invention there is provided an air-conditioning system for motor-vehicles, of a flat construction for installation on the roof, comprising a condensor unit accommodated in a housing part and an evaporator unit accommodated in another housing part, wherein one of these two units in the direction of travel is mounted substantially in line behind the other of the two units, and the evaporator unit has an inside housing part in which a circulating air opening from the passenger compartment opens out, through which the air from the passenger compartment via evaporator registers and/or heating registers which extend substantially parallel to the direction of travel, as well as via a blower arrangement can be fed back into the passenger compartment, characterized in that the evaporator unit lies in the direction of travel in front of the condenser unit and in the front face of its housing part has a fresh air inlet opening that can be closed off, and that the inside part of the housing around the circulating air opening is surrounded by inside partitions of the housing part of which the lateral partitions comprise circulating air flaps that can be opened and closed, and a rear partition of the inside part of the housing has a waste air flap that can be opened and closed, via which the air from the passenger compartment or the inside part of the housing can be discharged into the air flow path of the condenser unit.
It has been shown that also with an extremely small overall height of the air conditioning system, e.g. about 16 cm, an air inlet opening in the front face of the hou
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patent: 4098093 (1978-07-01), Czyl
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patent: 4201064 (1980-05-01), Krug et al.
patent: 4727728 (1988-01-01), Brown
patent: 4882913 (1989-11-01), LaCount, II et al.
Tapolcai William E.
Webasto Klimatechnik GmbH
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