Automotive air conditioning system

Claim 2

In an automobile air conditioning system for a compartment including a condenser, an expansion means and an evaporator, a simple temperature control system comprising: a refrigerant compressor having a rotor supported for continuous rotation by an automobile engine in a chamber defined by a compressor housing; said chamber and said rotor being configured with rises to produce alternating larger and smaller radial distances tHerebetween; radially projecting vanes supported in generally axial slots of said rotor for rotation therewith forming compression chambers between adjacent vane members; inlet and outlet means in said housing positioned downstream and upstream respectively from said rises for introducing and discharging refrigerant from said compression chambers; said rotor having undervane passage means adjacent the inner edge of each vane to permit a radial force to be applied to the vanes by fluid pressure therein; pressure control passage means formed in the end of said compressor housing and angularly located with respect to the beginning and termination of said rises to make fluid connection with said undervane passage means when said vanes are rotated into alignment therewith and pass the beginning and termination of each of said rises; auxiliary fluid pressurization means connected to said rotor for rotation therewith and being fluidly connected to said pressure control passage means to pressurize said undervane passage means and press said vanes radially outward against said housing thereby compressing fluid in said compression chambers formed thereby; thermostatically controlled means for controlling the pressurization of said undervane passages in response to changes in the temperature of a compartment to be cooled.

Claim 3

In an automobile air conditioning system for a compartment including a condenser, an expansion means and an evaporator, a simple temperature control system comprising: a refrigerant compressor having a rotor supported for continuous rotation by an automobile engine in a chamber defined by a compressor housing; said chamber and said rotor being configured with rises to produce alternating larger and smaller radial distances therebetween; radially projecting vanes supported in generally axial slots of said rotor for rotation therewith forming compression chambers between adjacent vane members; inlet and outlet means in said housing positioned downstream and upstream respectively from said rises for introducing and discharging refrigerant from said compression chambers; said rotor having undervane passage means adjacent the inner edge of each vane to permit a radial force to be applied to the vanes by fluid pressure therein; pressure control passage means formed in the end of said compressor housing and angularly located with respect to the beginning and termination of said rises to make fluid connection with said undervane passage means when said vanes are rotated into alignment therewith and pass the beginning and termination of each of said rises; auxiliary fluid pressurization means connected to said rotor for rotation therewith and being fluidly connected to said pressure control passage means to pressurize said undervane passage means and press said vanes radially outward against said housing thereby compressing fluid in said compression chambers formed thereby; means extending from the outlet of said fluid pressurization means to said control passage means in said compressor housing for transmitting pressure to said undervane passage means aligned therewith; selectively activated valve means in said pressure transmitting means for controlling the pressurization of said control passage means and undervane passage means; thermostatically controlled means selectively actuating said valve means to permit pressurization of said undervane passage means at compartment temperatures above a desired temperature.

Claim 4

In an automobile air conditioning system for a compartment including a condenser, an expansion means and an evaporator, a simple temperature control system comprising: a refrigerant compressor having a rotor supported for continuous rotation by an automobile engine in a chamber defined by a compressor housing; said chamber and said rotor being configured with rises to produce alternating larger and smaller radial distances therebetween; radially projecting vanes supported in generally axial slots of said rotor for rotation therewith forming compression chambers between adjacent vane members; inlet and outlet means in said housing positioned downstream and upstream respectively from said rises for introducing and discharging refrigerant from said compression chambers; said rotor having undervane passage means adjacent the inner edge of each vane to permit a radial force to be applied to the vanes by fluid pressure therein; pressure control passage means formed in the end of said compressor housing and angularly located with respect to the beginning and termination of said rises to make fluid connection with said undervane passage means when said vanes are rotated into alignment therewith and pass the beginning and termination of each of said rises; auxiliary fluid pressurization means connected to said rotor for rotation therewith and being fluidly connected to said pressure control passage means to pressurize said undervane passage means and press said vanes radially outward against said housing thereby compressing fluid in said compression chambers formed thereby; means extending from the outlet of said fluid pressurization means to said control passage means in said compressor housing for transmitting pressure to said undervane passage means aligned therewith; selectively activated valve means in said pressure transmitting means for controlling the pressurization of said control passage means and undervane passage means; thermostatically controlled means selectively actuating said valve means to permit pressurization of said undervane passage means at compartment temperatures above a desired temperature.

Claim 5

In an automobile air conditioning system for a compartment including a condenser, an expansion means and an evaporator, a simple temperature control system comprising: a refrigerant compressor having a rotor supported for continuous rotation by an automobile engine in a chamber defined by a compressor housing; said chamber and said rotor being configured with rises to produce alternating larger and smaller radial distances therebetween; radially projectiNg vanes supported in generally axial slots of said rotor for rotation therewith forming compression chambers between adjacent vane members; inlet and outlet means in said housing positioned downstream and upstream respectively from said rises for introducing and discharging refrigerant from said compression chambers; said rotor having undervane passage means adjacent the inner edge of each vane to permit a radial force to be applied to the vanes by fluid pressure therein; pressure control passage means formed in the end of said compressor housing and angularly located with respect to the beginning and termination of said rises to make fluid connection with said undervane passage means when said vanes are rotated into alignment therewith and pass the beginning and termination of each of said rises; auxiliary fluid pressurization means connected to said rotor for rotation therewith and being fluidly connected to said pressure control passage means to pressurize said undervane passage means and press said vanes radially outward against said housing thereby compressing fluid in said compression chambers formed thereby; first pressure transmitting means connected to said control passage means located adjacent the termination of each rise for pressurizing said control passage means and undervane passage means aligned therewith; second pressure transmitting means connected to said control passage means located adjacent the beginning of each rise for pressurizing said control passage means and undervane passage means aligned therewith; first valve means controlling the pressurization of said first control passage means for permitting the selective pressurization or depressurization thereof; second valve means controlling the pressurization of both first and second control passage means for permitting the selective pressurization or depressurization thereof; means including solenoid valve actuators associated with said first and second valve means and a thermally responsive member in the compartment for opening said valve means when the compartment temperature is above a desired preselected temperature and for closing said valve means when it is below said temperature thereby controlling the compressing action of said compressor by pressurizing or depressurizing said undervane passage means; pressure relief means connected between said first and second valve means thereby relieving the pressure in said undervane passage means as they are aligned with said second control chamber means whenever said valve means are closed.

Claim 6

In an automobile air conditioning system for a compartment including a condenser, an expansion means and an evaporator, a simple temperature control system comprising: a refrigerant compressor having a rotor supported for continuous rotation by an automobile engine in a chamber defined by a compressor housing; said chamber and said rotor being configured with rises to produce alternating larger and smaller radial distances therebetween; radially projectiNg vanes supported in generally axial slots of said rotor for rotation therewith forming compression chambers between adjacent vane members; inlet and outlet means in said housing positioned downstream and upstream respectively from said rises for introducing and discharging refrigerant from said compression chambers; said rotor having undervane passage means adjacent the inner edge of each vane to permit a radial force to be applied to the vanes by fluid pressure therein; pressure control passage means formed in the end of said compressor housing and angularly located with respect to the beginning and termination of said rises to make fluid connection with said undervane passage means when said vanes are rotated into alignment therewith and pass the beginning and termination of each of said rises; auxiliary fluid pressurization means connected to said rotor for rotation therewith and being fluidly connected to said pressure control passage means to pressurize said undervane passage means and press said vanes radially outward against said housing thereby compressing fluid in said compression chambers formed thereby; first pressure transmitting means connected to said control passage means located adjacent the termination of each rise for pressurizing said control passage means and undervane passage means aligned therewith; second pressure transmitting means connected to said control passage means located adjacent the beginning of each rise for pressurizing said control passage means and undervane passage means aligned therewith; first valve means controlling the pressurization of said first control passage means for permitting the selective pressurization or depressurization thereof; second valve means controlling the pressurization of both first and second control passage means for permitting the selective pressurization or depressurization thereof; means including solenoid valve actuators associated with said first and second valve means and a thermally responsive member in the compartment for opening said valve means when the compartment temperature is above a desired preselected temperature and for closing said valve means when it is below said temperature thereby controlling the compressing action of said compressor by pressurizing or depressurizing said undervane passage means; pressure relief means connected between said first and second valve means thereby relieving the pressure in said undervane passage means as they are aligned with said second control chamber means whenever said valve means are closed.