초록 ▼

An engine or heat pump for a refrigeration system employing a first elongated expansion-compression device defining a pair of chambers, each having a linearly movable piston therein which are axially interconnected by a hollow cylinder. A second expansion-compression device is mounted within the cyl

An engine or heat pump for a refrigeration system employing a first elongated expansion-compression device defining a pair of chambers, each having a linearly movable piston therein which are axially interconnected by a hollow cylinder. A second expansion-compression device is mounted within the cylinder. Conduit means are provided, one extending into each end of the first device, through the associated piston and into the cylinder. The first device forces working fluid received through the device to provide fluid under relatively high pressure to the power and work loops of a refrigeration system, while the second device actuated by the first device draws relatively low pressure fluid from the system and returns it under pressure to a source.

대표청구항 ▼

An engine comprising: a first elongated expansion-compression device having a pair of ends and defining a pair of axially aligned first and second chambers separated by a common flange and each having a linearly movable piston therein which are axially interconnected by a hollow cylinder extending t

An engine comprising: a first elongated expansion-compression device having a pair of ends and defining a pair of axially aligned first and second chambers separated by a common flange and each having a linearly movable piston therein which are axially interconnected by a hollow cylinder extending through said flange, each of the pistons divide its associated chamber into a first sub-chamber and a second sub-chamber of varying size as its associated piston moves therealong, a second expansion-compression device mounted within said cylinder and comprising a stationary member forming a portion of said flange extending laterally across said cylinder, said member dividing the hollow interior of said cylinder into third and fourth sub-chambers of varying size as the pistons of said first device moves along their associated chambers, conduit means, one extending into each end of said first device and through its associated piston and into said cylinder, passageways formed in said portion of said flange, each connecting a different one of said third and fourth subchambers to the hollow interior of a different one of said conduit means, each of the first and second sub-chambers having a first inlet port and a first outlet port and first valve means associated with each first inlet and first outlet port for controlling the flow of a refrigerant therethrough, and each of the third and fourth sub-chambers having a second inlet port and a second outlet port formed in said portion of said flange and second valve means associated with each second inlet and each second outlet port for controlling the flow of refrigerant from one of the third and fourth subchambers through one of said passageways and into one of said conduit means, said valve means of the first and second devices open and close their associated ports in a predetermined sequence.