Patent ID: 6050101
Filing Date: 2000-04-18
Classification: F25B,F28D,F28F

Abstract:
A high EER air conditioning apparatus with special heat exchanger comprising:an evaporating unit having a high efficiency heat exchanger to cool the air delivered by a fan system from outdoor space to a room space, said high efficiency heat exchanger including:a. a plurality of rectangular heat conductive metal plates horizontally fastened in parallel by four studs to define two different groups of spaces namely space A and B alternatively one over another;b. a wave-like metal plate disposed to each of said space A to form a plurality of air passages for providing a large heat conducting area therefore; and,c. two rows of medium coil pipes with at least three pipes in each row disposed laterally through each of said space B connected by U-turn connectors to build up two coils therein, and a plurality of metal fins to support an upper row and a lower row of said medium coil pipes respectively in contact with adjacent said rectangular metal plates, in which also a plurality of air passages are formed between two rows of said coil pipes and separated by said metal fins providing another large heat conducting area therefore to obtain high heat exchange efficiency;a condensing unit having a water evaporating system added to a high efficiency heat exchanger having a structure like that of said evaporator to cool a working medium therein to a low temperature which is much lower than that obtained by conventional condensing units;two fan systems, one fan system for introducing fresh air flow from an outdoor space to be cooled by said evaporating unit and flow into a room space, the other of said fan systems being for drawing exhaust air flow to the outdoor space through said condensing unit; and,a working medium system having a low compression ratio compressor of low pressure that can liquefy the working medium sufficiently in said condensing unit due to the working medium being cooled to said low temperature.