Resources Contact Us Home
Frost-resistant year-round heat pump

Image Number 4 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 method of manufacturing the same
Herbal composition for the treatment of wound healing, a regenerative medicine
Compression molding method and reinforced thermoplastic parts molded thereby
Retransmission and retransmission request in data communication systems
Method of fabricating a solar cell with a tunnel dielectric layer
Generalized AC-DC synchronous rectification techniques for single- and multi-phase systems
Method of modified facies proportions upon history matching of a geological model
  Randomly Featured Patents
Exposure apparatus, exposure and developing system, and method of manufacturing a device
Coding symbology and a method for printing same
Sewing machine thread take-up lever
Liquid crystal display (LCD) cell transport apparatus
Genomic DNA fragment of Streptococcus pneumoniae, hybridization probe, amplification primer, reagent and method for the detection of Streptococcus pneumoniae
Vibratory parts feeder with pivotal top confinement
Heat-sensitive recording materials
Video information management system which provides intelligent responses to video data content features
Device for the remote assembly of two members
Method for producing cure system, adhesive system, and electronic device