Thomas Edwards
Radiology at Jericho Dr, Casselberry, FL

3967466, Jul 6, 1976

Mar 17, 1975

5/559063

Thomas C. Edwards - Casselberry FL

The Rovac Corporation - Maitland FL

F25D 900

62402

An air conditioning unit having a driven rotor with a plurality of vanes and including a compressor portion and an expander portion, each having inlet and outlet ports, with a heat exchanger connected between the compressor outlet port and the expander inlet port. A non-condensing gas such as air is fed into the compressor inlet port, compressed, accompanied by a rise in temperature, cooled by the heat exchanger, and expanded back to substantially its initial pressure for discharge in the cold state at the expander outlet port, a non-condensing gas being defined as any gas which does not condense at the pressures and temperatures encountered in the unit. In accordance with the main feature of the present invention, means are provided for spraying into the non-condensing gas at the compressor inlet port an excess of finely divided droplets of a condensible additive fluid, having a high heat of vaporization, to super-saturate the gas, the droplets evaporating due to the temperature achieved in compression thereby absorbing heat of vaporization. This results in a reduction in temperature of the gas at the compressor outlet port thereby reducing the work required to compress the gas and consequently the work required to drive the rotor. As the compressed gas is cooled in the heat exchanger, the excess additive fluid condenses, is collected in a sump, and recirculated back to the compressor inlet port.

3977852, Aug 31, 1976

Apr 2, 1975

5/564439

Thomas C. Edwards - Casselberry FL

The Rovac Corporation - Maitland FL

F25D 900

62402

A compressor-expander having a vaned rotor eccentrically mounted in a cylindrical chamber to define a series of compartments which vary in volume through volumetric stages which are maximum, convergent, minimum and divergent. The compressor-expander has an associated heat exchanger connected to heat exchanger ports at the convergent and divergent stages and spaced inlet and outlet ports at the maximum stage. Means are provided for inducing, or blowing, warm air through the successively presented compartments at the maximum stage to achieve a scavenged discharge of cool air to recharge each compartment with warm air. Preferably the flow is induced by a high pressure jet which entrains air in the air stream to produce an amplified flow, the compressed air being bled from the cold end of the heat exchanger. A valve is interposed in the bleed line to coordinate the rate of bleed either manually or automatically with the rotor speed or the operating conditions, primarily pressure, existing in the heat exchanger. Where the rotor speed is subject to variation over wide limits, as in automotive usage, a relief type valve may be used.

3968649, Jul 13, 1976

Apr 15, 1974

5/460700

Thomas C. Edwards - Casselberry FL

The Rovac Corporation - Maitland FL

B01D 5000

60297

An emission control system for an internal combustion engine cools the exhaust gases sufficiently to condense a substantial portion of the pollutants as a separable liquid or solid phase. The engine exhaust gases are initially cooled and then compressed, again cooled, and work-expanded in an open reversed Brayton cycle to obtain a significant temperature decrease. The resulting cooled gases from this the pollutants are readily separated may be employed to provide refrigeration or air-conditioning for moving vehicles.