Patent ID: 7735333
Filing Date: 2010-06-15
Classification: F25B

Abstract:
1. An air conditioning and refrigeration system, comprising: a compressor, connecting a four-way valve with a pipeline, the four-way valve being controlled to selectively direct high temperature gaseous refrigerant with oil moving along a delivering pipe toward an outdoor or an indoor heat exchanger; two thermal compensation devices, being connected to both ends of the delivering pipe respectively and further connected to the outdoor heat exchanger and the indoor heat exchanger respectively, the two heat exchangers being connected to each other with another pipeline; wherein, each of the thermal compensation devices having a branch pipe with a plurality of distributing capillary tubes at the terminate end thereof being attached to a coil pipe of the heat exchangers respectively for liquid refrigerant with oil being parallel injected into are guided out the heat exchangers and passing through a plurality of thermal compensation capillary tubes so as to occur thermal compensation with another liquid or gaseous refrigerant with oil guided or discharged by a manifold next to the heat exchangers before entering related circulating path; whereby, cold oil from a evaporator absorbs heat of the liquid refrigerant by means of the the liquid refrigerant passing through the thermal compensation capillary tubes in the thermal compensation devices such that the oil increases temperature and is softened and the liquid refrigerant with oil drops to the least temperature.