VUILLEUMIER HEAT PUNP DEVICE.

摘要

A heat pump device composed of a high-temperature-side heat pump (2) comprising a high-temperature-side cylinder (21) which receives therein a high-temperature-side displacer (22), and a low-temperature-side heat pump (3) comprising a low-temperature-side cylinder (31) which receives therein a low-temperature-side displacer (32). Rods (23, 33) connected to the respective displacers (22, 23) are connected to each other by a coupling mechanism (4). Volume regulating means (8a) is provided for changing a volume in an intermediate-temperature space (35) in the low-temperature-side rod (33). In addition, volume control means (9a) is provided for detecting the number of revolutions of a crankshaft (42) on the coupling mechanism (4), calculating a volume in the intermediate-temperature space (35), which volume corresponds to the above number of revolutions, and controlling the volume regulating means (8a) such that the volume in the intermediate-temperature space (35) eqals the calculated volume. Thus an improvement of a net COP (coefficient of performance) is achieved.