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US 4,967,567 AGranted
System and method for diagnosing the operation of air conditioner systems
AssigneeMurray, Inc.
InventorsRobert H. Proctor, Dennis P. Eichenlaub
Life of this patent
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AssigneeMurray, Inc.
InventorsRobert H. Proctor, Dennis P. Eichenlaub
Estimating the term…
A microprocessor provides a diagnostic capability, and includes tables of acceptable values of parameters, such as air discharge temperature, suction pressure, etc., for different automobile makes and air conditioner types; provision is made for adjusting the acceptable ranges of such values due to one or more ambient factors, of which ambient relative humidity may be one. The microprocessor, after determining whether the air conditioning system has a cycling or a non-cyling clutch and providing a valid set of actual system values based on whether the clutch is cycling or non-cycling, compares actual values to acceptable value ranges of the air conditioner operating values, and displays possible causes of air conditioner malfunction on a video screen. Self-testing of both the microprocessor and associated electrical elements, and of mechanical elements such as conduits, valves and a scale is performed. the operator may command the microprocessor to display, in smaller print, a relatively large volume of detailed instrucitonal material dealing with specific checking procedures or repair. An air conditioner charging station withdraws refrigerant from an air conditioner, reclaims it by removing certain materials, and returns the reclaimed refrigerant to the same air conditioner from which it was withdrawn, and also provides new, make-up refrigerant to the air conditoner, in the amount necessary to make a full charge.
A method for determining the cause of a malfunction in an air conditioning system for providing cooled air having a variable speed compressor, a condenser and an evaporator, comprising:
The method of claim and further comprising establishing ranges of acceptable system values for each of a plurality of different air conditioning systems, wherein said sensing of system values is of one of said plurality of air conditioning systems, and wherein the relationship determination is the determining of the relationship of at least one acquired system value to the adjusted range of the corresponding acceptable system value for the air conditioning system of which the values are sensed.
A method for determining the cause of a malfunction in an air conditioning system having a variable speed compressor with operating clutch, a condenser and an evaporator comprising:
Apparatus determining the cause of a malfunction in an air conditioning system for providing cooled air having a variable speed compressor, a condenser and an evaporator comprising:
Apparatus for determining the cause of a malfunction in an air conditioning system having a variable speed compressor with operating clutch, a condenser and an evaporator comprising:
A method for determining the cause of a malfunction in an air conditioning system having a variable speed compressor, a condenser and an evaporator, comprising:
Dependencies are inferred from the claim text.