Refrigeration – With vehicle feature
Reexamination Certificate
1999-05-10
2001-01-16
Doerrler, William (Department: 3744)
Refrigeration
With vehicle feature
C062S238600, C062S323100, C123S041190
Reexamination Certificate
active
06173578
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to air conditioning and in particular to air conditioning designed to cool a vehicle engine and also provide cooling inside the vehicle.
BACKGROUND OF THE INVENTION
This invention is used to cool all vehicle engines and similar engines, providing them with a longer period of operation. It is known that vehicle air conditioning, upon its operation in the summer, raises the temperature of the vehicle engine, causing engine damage or shortening the period of engine life. In particular, such increased temperature damages most parts of the engine and water hoses, conveyors, wires and other material, thus increasing the consumption of spare parts. This effect occurs because the condenser is place in front of the radiator and heat coming out of the condenser goes to the radiator, raising its temperature and, consequently, the temperature of the vehicle engine. The suction pipe conducting cold air from the evaporator to the compressor could be used to counteract this heating effect, but this is not presently being done. The freon in the form of a liquid in the cold suction pipe also may cause damage to the compressor. The performance of current air conditioning in vehicles is reduced due to the influence of high temperature generated in the air conditioning, especially upon a vehicle stopping or driving slowly, and due to an increase in pressure during the air conditioning cooling cycle.
SUMMARY OF THE INVENTION
This invention makes substantial progress in alleviating the above mentioned problems and dangers. This invention lowers the engine temperature in the summer during air conditioning operation and provides air conditioning inside the vehicle. In addition, it protects the compressor as the freon comes back to the compressor in the form of a gas. This method also increases the engine life and decreases the consumption of spare parts affected by high temperature such as piston rings, oil seals, valves, conveyors, hoses, wires and other materials inside or around the engine.
This invention causes the engine temperature to be about one-quarter of the temperature as identified on temperature measuring devices on the engine during operation in the summer, i.e. when the ambient temperature is 45° C. (113° F.). This reduction in the engine temperature lengthens the life of the engine and improves the air conditioning's performance inside the car. In contrast, the former and current technology causes the high temperature of the engine during air conditioning operation in the summer to be more than one-and-one-half times the specified vehicle temperature. This causes a reduced engine life, the engine being affected by long exposure to high temperature, and causes the consumption of spare parts of the engine, such as piston rings, oil seals, valves, conveyors, hoses, wires and other materials inside or around the engine which are damaged. Sometimes, there is damage in the compressor since the freon goes back to the compressor in the form of a liquid.
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Abelman ,Frayne & Schwab
Doerrler William
Jiang Chen-Wen
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