Motor-driven, expander-compressor transducer

An improved expander-compressor transducer for expanding refrigerant fluid from a high pressure source into a low pressure heat absorbing heat exchanger while simultaneously compressing the same fluid stream derived from the low pressure heat absorbing heat exchanger, said expander-compressor transducer having:

• a body member enclosing a chamber for confinement of a refrigerant;
• fluid responsive piston means arranged to oscillate in said chamber and dividing said chamber into an expansion chamber at one end and a compression chamber at the other end;
• fluid control regulating means for permitting flow of refrigerant fluid into and out of said expansion chamber and into said compression chamber;
• and,
• check valve means for permitting refrigerant flow out of said compression chamber whenever the pressure in said compression chamber is higher than the fluid pressure immediately downstream of said check valve means;
• wherein said improvement is characterized by:
• motive means for oscillating said piston means within said chamber and causing said gaseous fluid to expand in said expansion chamber and concurrently to compress in said compression chamber;
• thereby producing simultaneously cooling and heating effects.