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公开(公告)号：US4438881A
公开(公告)日：1984-03-27
申请号：US228919
申请日：1981-01-27
CPC分类号： F25B13/00 , F24D11/0221 , F25B29/003 , G05D23/1924 , Y02B10/20 , Y02B10/70 , Y02B30/126
摘要： A solar assisted heat pump fluid heating system capable of reliable operation at higher than normal ambient temperatures is disclosed. The system includes a collection of solar panels and primary fluid storage tanks having integral coiled heat exchangers interconnected and charged with heat transfer fluid to produce heat. Temperature sensors positioned at the panels and storage tanks transmit temperature signals to solar control circuit. At predetermined temperatures, the solar control circuit energizes a first circulation pump transferring heated fluid from the panels, effecting heat transfer with a low temperature working fluid stored in the tanks. A second circulation pump transfers stored working fluid to a heat exchanger, effecting heat transfer. A heat pump generating a hot refrigerant fluid provides additional heat input when entering working fluid to the heat exchanger is below a predetermined temperature. The heat pump includes an evaporator, compressor and accumulator interconnected in refrigerant flow relationship to provide the hot gas to the heat exchanger. A motor driven evaporator fan circulates ambient air through the evaporator to heat the refrigerant fluid. The heated fluid is then compressed into a superheated refrigerant gas. A modulating control circuit detects fluid temperature of refrigerant leaving the evaporator and controls the fan speed to maintain the fluid within a predetermined temperature range. By restricting ambient air flow through the evaporator, heat pump operation at higher than normal ambient temperatures is possible. Alternatively, damper vanes positioned adjacent openings exposing the evaporator to ambient air are operated by a modulating motor, energized by the modulating control circuit to further restrict air flow and control refrigerant fluid temperature. Heated working fluid leaving the heat exchanger is stored in secondary storage tanks. A third circulation pump with thermostatic control circuit mixes fluid in the primary and secondary tanks, to obtain better fluid heating when temperatures at the solar collecting panel are below a predetermined temperature.
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公开(公告)号：US5628200A
公开(公告)日：1997-05-13
申请号：US372732
申请日：1995-01-12
CPC分类号： F25B13/00 , F24F3/06 , F24F5/0017 , F25B2313/009 , F25B2313/0292 , F25B2313/0293 , F25B2313/0294 , F25B2313/0314 , F25B2341/066 , F25B2400/051 , F25B2600/2501 , F25B2600/2515 , F25B2700/2104 , F25B40/00 , Y02E60/147
摘要： A reversible heat pump provides multiple heating and cooling modes and includes a compressor, an evaporator and heat exchanger all interconnected and charged with refrigerant fluid. The heat exchanger includes tanks connected in series to the water supply and a condenser feed line with heat transfer sections connected in counterflow relationship. The heat pump has an accumulator and suction line for the refrigerant fluid upstream of the compressor. Sub-cool transfer tubes associated with the accumulator/suction line reclaim a portion of the heat from the heat exchanger. A reversing valve switches between heating/cooling modes. A first bypass is operative to direct the refrigerant fluid around the sub-cool transfer tubes in the space cooling only mode and during which an expansion valve is utilized upstream of the evaporator/indoor coil. A second bypass is provided around the expansion valve. A programmable microprocessor activates the first bypass in the cooling only mode and deactivates the second bypass, and vice-versa in the multiple heating modes for said heat exchanger. In the heating modes, the evaporator may include an auxiliary outdoor coil for direct supplemental heat dissipation into ambient air. In the multiple heating modes, the condensed refrigerant fluid is regulated by a flow control valve.
摘要翻译： 可逆式热泵提供多种加热和冷却模式，包括压缩机，蒸发器和热交换器，全部互连并充满制冷剂流体。 热交换器包括与水源串联连接的罐和具有逆流关系连接的传热部分的冷凝器进料管线。 热泵具有用于压缩机上游的制冷剂流体的蓄能器和吸入管线。 与蓄能器/吸入管相关联的次冷转移管回收热交换器的一部分热量。 换热阀在加热/冷却模式之间切换。 第一旁路可操作以仅在空间冷却模式中引导制冷剂流体在副冷却传输管周围，并且在该过程中，在蒸发器/室内线圈的上游使用膨胀阀。 在膨胀阀周围设置第二个旁路。 可编程微处理器在仅冷却模式下激活第一旁路，并且在所述热交换器的多个加热模式中停用第二旁路，反之亦然。 在加热模式下，蒸发器可以包括辅助室外线圈，用于直接辅助散热到环境空气中。 在多种加热模式中，冷凝的制冷剂流体由流量控制阀调节。
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