Single flow circuit heat exchange device for periodic positive and reverse directional pumping

Abstract

The present invention discloses that the temperature distribution status between fluid and heat exchanger or full heat exchanger is improved by periodically changing the flow directions of the positive or reverse directional pumping fluid, wherein the positive or reverse directional pumping fluid is passed through the heat exchanger inside fluid pump, or through the heat exchanger being insertingly installed or coated with desiccant material, or the heat exchanger itself having concurrent moisture absorbing function thereby constituting the thermal energy reclaim and dehumidification effect of full heat exchange functions as well as reducing the disadvantages of impurity accumulations at fixed flow direction.

1 . A single flow circuit heat exchange device for periodic positive and reverse directional pumping which is installed with the bidirectional fluid pumping device ( 123 ) for periodic positive and reverse directional pumping, and the periodic fluid direction-change operative control device ( 250 ) for operatively controlling the bidirectional fluid pumping device ( 123 ) to the heat exchange device or full heat exchange device so as to allow the fluid originally pumped in fixed flow direction appear periodically alternative flow directional change, wherein:
 The bidirectional fluid pumping device ( 123 ): It is constituted by 1) the fluid pumping device capable of producing positive pressure to push fluid; 2) the fluid pumping device capable of producing negative pressure to attract fluid; or 3) the fluid pumping device having both functions of producing positive pressure to push fluid and negative pressure to attract fluid for pumping gaseous or liquid state fluids, wherein the fluid pump is driven by electric motor, engine power, or mechanical or electric power converted from other wind power, thermal energy, temperature-difference energy, or solar energy, etc;
 According to above said definitions on operating functions, the selectable embodiments of said bidirectional fluid pumping device ( 123 ) include the following: 
   1) It is by adopting at least one bidirectional pumping fluid pump to suck and discharge the fluid, wherein flow direction of the fluid is periodically changed by periodically operating the pump in positive or reverse direction; or   2) It is constituted by at least two unidirectional fluid pumps of different pumping directions in series connection to constitute bidirectional fluid pumping device ( 123 ) for periodically alternatively pumping to periodically exchange the fluid flow direction; or   3) It is constituted by two unidirectional fluid pumps of different pumping directions in parallel connection for periodic alternatively pumping to periodically exchange the fluid flow directions, wherein if the pumps has no static anti-reverse flow characteristics, they can be respectively series connected with an unidirectional valve to avoid reverse flow; therefore the two pumps of different pumping directions are alternatively pumped to periodically exchange the fluid flow directions; or   4) It is constituted by at least one unidirectional fluid pump and four controllable switch type fluid valves in bridge type combination, wherein the fluid flow direction is periodically changed by alternatively operatively control two fluid valves to open and the other two fluid valves to close;   The periodic fluid direction-change operative control device ( 250 ): It is constituted by electromechanical components, solid state electronic components, or microprocessors and relevant software and operative control interfaces to operatively control the bidirectional fluid pumping device ( 123 ) for periodically changing the flow direction of the fluid passing through heat exchange device or full heat exchange device thereby operatively controlling the temperature difference distribution status between fluid and heat exchanger;
 The timing for fluid periodic flow direction change can be 1) the open loop type operative control by presetting the direction-change period of fluid flow; or 2) the closed loop type operative control by detecting the temperature difference between fluid and heat exchanger at setting locations for periodic closed loop fluid flow direction change timing operative control; or 3) randomly manual change. 
   
     
     
         2 . A single flow circuit heat exchange device for periodic positive and reverse directional pumping, wherein the embodied constitution types of heat exchanger or full heat exchanger include being the tubular structure in linear or other geometric shapes. 
     
     
         3 . A single flow circuit heat exchange device for periodic positive and reverse directional pumping, wherein the embodied constitution types of heat exchanger or full heat exchanger include being constituted by the multi-layer structure having fluid path for passing gaseous or liquid state fluids. 
     
     
         4 . A single flow circuit heat exchange device for periodic positive and reverse directional pumping, wherein the embodied constitution types of heat exchanger or full heat exchanger include being constituted by one or more than one fluid path in series connection, parallel connection or series and parallel connection.