The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 1986
Filed:
Dec. 05, 1985
Hitachi, Ltd., Tokyo, JP;
Abstract
An improved air-cooled heat pump type refrigerating apparatus having a refrigerant circuit reversible into a heating mode and a cooling mode, comprising a series of elements connected by piping means, which include a compressor, a four-way valve, an indoor heat exchanger, a capillary tube for cooling having first check valve connected in parallel therewith, a capillary tube for heating having second check valve connected in parallel therewith and an outdoor heat exchanger. The circuit, by switching the four-way valve, is capable of providing a heating operating mode, a cooling operation mode or a defrosting operation mode. The apparatus is constructed such that a branch tube branching off from a discharge tube of the compressor is provided and midway thereon with a solenoid valve and has a plurality of capillary tubes connected to the other end the branch tube through a distributor. The capillary tubes are connected respectively to heat transfer tubes of the outdoor heat exchanger at points midway thereon. The solenoid valve is arranged to effect during the heating operation the opening and closing thereof by a control circuit which operates to sense the outdoor air temperature and relative humidity.