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
System and method for providing security in browser-based access to smart cards
Determination of copy number variations using binomial probability calculations
Halogen-free flame retardants for epoxy resin systems
Subband SNR correction in a frequency selective scheduler
Systems and methods for detecting and rejecting defective absorbent articles from a converting line
Server-side web analytics system and method
Sampling switch circuit that uses correlated level shifting
  Randomly Featured Patents
Electro-optic device
Self supporting optical diffraction grid
Insulated tent
Device and method for performing communication in a camera between a camera body and an optical system
Adjustment system for a speed reduction belt assembly
Microfiltration of skim milk for cheese making and whey proteins
Nasal dilator with fibrous PSA
Hole saw
System and method for updating and distributing information
Open cooler