Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Frost-resistant year-round heat pump










Image Number 6 for United States Patent #4596123.

This invention is an improved refrigerant-cycle heat pump that requires neither a defrosting means nor a backup heat source. From widely varying outside environments, it pumps heat to heat living spaces or domestic hot water. Liquid refrigerant flows from a receiver through expansion valves into an outside evaporator consisting of a segmented array of plates where heat is absorbed from the atmosphere to evaporate the refrigerant. The resultant gas is compressed by a motor-driven compressor, gives up heat in a condenser, becomes liquid, and returns to the receiver. The segmented evaporator enables the self-governing heat pump system to choose the proper magnitude of evaporator area, in response to its determination of compressor suction pressure or motor power demand, so as to provide a steady refrigerant flow to the compressor and thereby maintain optimum heat pumping despite extreme excursions of outside temperature. The configuration of evaporator segments as plates enables the system to operate without interruption or performance deterioration even though frost or ice forms on plate surfaces.








 
 
  Recently Added Patents
Semiconductor device and manufacturing method thereof
Display screen with graphical user interface
Molecular hydrogen stores and hydrogen transfer reagents for hydrogenation reactions
Categorization of design rule errors
Optical angular position detection apparatus and method
Data processing circuit with arbitration between a plurality of queues
Data-conditioned encryption method
  Randomly Featured Patents
Karaoke system and contents storage medium therefor
Method and apparatus for absolute activity determination of radionuclides
Ceramic foams
Method and apparatus for single reactor wastewater treatment system
Software debugging system for writing a logical address conversion data into a trace memory of an emulator
Semiconductor substrate and light emitting device using the same
Process for the preparation of 3-((4-bromo-2-fluorophenyl)methyl)-3,4-dihydro-4-oxo-1-phthalazine-aceti c acid
X-ray scanning system performing synchronization using wireless signal
Method of controlling the nozzle damper of a metallurgical vessel
Method for the production of butadiene from n-butane