Hybrid thermal powered and engine powered automobile air conditioning system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25B-001/06
출원번호
US-0358648
(1989-05-30)
발명자
/ 주소
Fineblum Solomon S. (112 Shady La. Randolph NJ 07869)
인용정보
피인용 횟수 :
11인용 특허 :
6
초록▼
An air conditioning system with a common refrigerant supply, an engine-driven compressor circuit and a thermal compression circuit in parallel with the compressor circuit, a high efficiency compact thermal compressor which is either an ejector or a double vortex chamber flow inducer and a new contro
An air conditioning system with a common refrigerant supply, an engine-driven compressor circuit and a thermal compression circuit in parallel with the compressor circuit, a high efficiency compact thermal compressor which is either an ejector or a double vortex chamber flow inducer and a new control system which saves energy by unloading the mechanical compressor when thermal compression is fully operative. The hybrid system includes a check valve which prevents refrigerant flow from the compressor through the thermally powered compressor. Timers start the refrigerant pump of thermal compression circuit. Pressure switches sense operating pressure of the refrigerant. A refrigerant pump and a heat exchanger vapor generator generate high pressure refrigerant vapor which drives the thermal compressor. Refrigerant pump starts after initial cooling of passenger compartment is achieved by mechanical compressor circuit. Engine driven compressor is unloaded when outlet pressure of thermal compressor is high enough to drive system. THe precooling of the passenger compartment by mechanical compressor and subsequent unloading and deactivation of the engine-driven mechanical compressor permits lower fuel consumption. The system can operate with ozone-sparing refrigerants to replace CFC refrigerants, as well as with R12.
대표청구항▼
In a hybrid air conditioning system for a motor vehicle comprising a mechanical compressor driven by the engine of said motor vehicle and, in a refrigerant circuit parallel, therewith, a thermal compression means, said mechanical compressor and said thermal compression means in a circuit including a
In a hybrid air conditioning system for a motor vehicle comprising a mechanical compressor driven by the engine of said motor vehicle and, in a refrigerant circuit parallel, therewith, a thermal compression means, said mechanical compressor and said thermal compression means in a circuit including an evaporator, a suction valve a condenser, a reservoir, an expansion pressure reduction means upstream of said evaporator, a refrigerant pump, a vapor generating heat exchanger and a means for conducting coolant from the coolant jacket of said engine into and through said vapor generating heat exchanger in thermal contact with liquid refrigerant, various temperature and pressure detection means, and a control circuit, that improvement comprising: a check-valve in fluid flow series with said thermal compression means; an electrical ON-OFF switch which turns on said mechanical compressor as soon as the air conditioner is turned on when said engine is running; a timer switch for turning on said refrigerant pump after a period of said mechanical compressor operation sufficient to assure that said mechanical compressor has been effective in achieving the initial cool-down of the passenger compartment; a coolant by-pass valve in engine coolant line from said coolant jacket of said engine to the radiator of said motor vehicle; a pressure switch at the outlet of said thermal compression means adapted to sense a minimum pressure of refrigerant vapor as required for condensation, said pressure switch actuating controls to unload said mechanical compressor by turning off said mechanical compressor when said thermal compression means is capable of driving refrigeration system as indicated by the high pressure at the outlet of said thermal compressor; whereby, initially, the refrigerant vapor is pulled out of said evaporator, compressed and forced into said condenser by the action of said mechanical compressor which is powered by said engine, said refrigerant vapor condensing into liquid within said condenser, from whence it flows into and through said reservoir and thence through said expansion, pressure-reduction means which is immediately upstream of said evaporator which is in heat transfer contact with air in said passenger compartment, wherein the refrigerant in said evaporator is endothermally evaporated such that heat is absorbed from said passenger compartment through the evaporator into said evaporating vapor and such that the vapor is pulled from said evaporator through said suction valve into the suction inlet of said mechanical compressor until sufficient time has elapsed for the coolant in said engine coolant jacket to get hot enough to boil said refrigerant in said vapor generating heat exchanger, the time being measured by said timer which acts to close off said coolant by-pass valve, thus forcing coolant to flow through said vapor generating heat exchanger, and some cool-down has been achieved in said passenger compartment, additional time being measured by another said timer which acts to energize said refrigerant pump which draws some of the liquid refrigerant from the fluid conduit downstream of said reservoir and drives said liquid into said vapor generating heat exchanger wherein the hot engine coolant transfers sufficient heat to boil the high pressure liquid refrigerant such that the resulting high pressure vapor flows from said vapor generating heat exchanger into the primary inlet of said thermal compression means, wherein the vapor is greatly accelerated and wherein sufficient suction is created to draw refrigerant vapor from said evaporator and wherein the vapor is compressed and from whence the compressed vapor is driven into said condenser wherein the vapor is exothermally condensed and from whence the liquid refrigerant flows into and through said reservoir and into a liquid refrigerant conduit which directs some refrigerant into said refrigerant pump and some refrigerant into said expansion, pressure-reducing means which releases low pressure liquid refrigerant for inlet into said evaporator wherein the refrigerant endothermally absorbs heat from the evaporator and from which the refrigerant flows into the secondary inlet of said thermal compression means in the refrigerant branch which flows from the evaporator outlet tube at a point between said evaporator and said suction valve, into said branch which contains the thermal compression means and check valve in series, to continue the refrigeration cycle which is driven by said thermal compression means which receives its energy from the waste heat in the hot engine coolant and thereby conserving the energy which is usually used to drive said conventional mechanical compressor which is taken from said engine, thus improving the fuel consumption of such vehicles so equipped.
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이 특허에 인용된 특허 (6)
Lowi ; Jr. Alvin (2146 Toscanini Dr. San Pedro CA 90732), Combined engine cooling system and waste-heat driven automotive air conditioning system.
Hiser Leland L. (P.O. Box 95 New Braunfels TX 78130), Method and apparatus for using low grade thermal energy to improve efficiency of air conditioning and refrigeration syst.
Allen ; deceased Reed R. (825 S. Wolfe Rd. late of Sunnyvale CA) Allen ; heir by Mary G. (825 S. Wolfe Rd. Sunnyvale CA 94086), Refrigeration apparatus and method.
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