Patents by Inventor Mitsuo Ogawa

Mitsuo Ogawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Heat pump including auxiliary outdoor heat exchanger acting as defroster and sub-cooler
    Patent number: 4171622
    Abstract: A heat pump including an indoor heat exchanger, a main outdoor heat exchanger and an auxiliary outdoor heat exchanger provided underneath the main outdoor heat exchanger and connected between the indoor and main outdoor heat exchangers in a closed refrigerant flow circuit. The refrigerant flow circuit includes a compressor and a reversal valve which can be adjusted (1) during cooling operation to direct the hot compressed gaseous refrigerant from the compressor to the main outdoor heat exchanger and thence to the auxiliary heat exchanger acting as a sub-cooler into the indoor heat exchanger for extracting heat from air of the interior of a building and (2) during heating operation to direct the hot compressed gaseous refrigerant to the indoor heat exchanger to supply heat to the indoor air and then to the auxiliary heat exchanger now acting as a defroster for melting a block of ice which may have accumulated under the main outdoor heat exchanger and into the main outdoor heat exchanger.
    Type: Grant
    Filed: July 28, 1977
    Date of Patent: October 23, 1979
    Assignees: Matsushita Electric Industrial Co., Limited, Matsushita Reiki Company, Limited
    Inventors: Koichiro Yamaguchi, Makoto Obata, Mitsuo Ogawa