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Title: Frostless heat pump having thermal expansion valves

Abstract

A heat pump system having an operable relationship for transferring heat between an exterior atmosphere and an interior atmosphere via a fluid refrigerant and further having a compressor, an interior heat exchanger, an exterior heat exchanger, a heat pump reversing valve, an accumulator, a thermal expansion valve having a remote sensing bulb disposed in heat transferable contact with the refrigerant piping section between said accumulator and said reversing valve, an outdoor temperature sensor, and a first means for heating said remote sensing bulb in response to said outdoor temperature sensor thereby opening said thermal expansion valve to raise suction pressure in order to mitigate defrosting of said exterior heat exchanger wherein said heat pump continues to operate in a heating mode.

Inventors:
 [1];  [2]
  1. Knoxville, TN
  2. Oak Ridge, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
874816
Patent Number(s):
6,467,284
Assignee:
UT-Battelle, LLC (Oak Ridge, TN) ORNL
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
frostless; heat; pump; thermal; expansion; valves; operable; relationship; transferring; exterior; atmosphere; interior; via; fluid; refrigerant; compressor; exchanger; reversing; valve; accumulator; remote; sensing; bulb; disposed; transferable; contact; piping; section; outdoor; temperature; sensor; means; heating; response; raise; suction; pressure; mitigate; defrosting; continues; operate; mode; heat exchanger; heat transfer; thermal expansion; heat pump; transferring heat; /62/

Citation Formats

Chen, Fang C, and Mei, Viung C. Frostless heat pump having thermal expansion valves. United States: N. p., 2002. Web.
Chen, Fang C, & Mei, Viung C. Frostless heat pump having thermal expansion valves. United States.
Chen, Fang C, and Mei, Viung C. Tue . "Frostless heat pump having thermal expansion valves". United States. https://www.osti.gov/servlets/purl/874816.
@article{osti_874816,
title = {Frostless heat pump having thermal expansion valves},
author = {Chen, Fang C and Mei, Viung C},
abstractNote = {A heat pump system having an operable relationship for transferring heat between an exterior atmosphere and an interior atmosphere via a fluid refrigerant and further having a compressor, an interior heat exchanger, an exterior heat exchanger, a heat pump reversing valve, an accumulator, a thermal expansion valve having a remote sensing bulb disposed in heat transferable contact with the refrigerant piping section between said accumulator and said reversing valve, an outdoor temperature sensor, and a first means for heating said remote sensing bulb in response to said outdoor temperature sensor thereby opening said thermal expansion valve to raise suction pressure in order to mitigate defrosting of said exterior heat exchanger wherein said heat pump continues to operate in a heating mode.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {10}
}

Patent:

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