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:
Oct. 15, 1991
Filed:
Feb. 21, 1991
James H Haley, Eden Prairie, MN (US);
Thermo King Corporation, Minneapolis, MN (US);
Abstract
A transport refrigeration system which includes a compressor, a condenser, a receiver, an evaporator, an accumulator, and a control valve having cooling and heating output ports which are alternatively connected to first or second refrigerant circuits to initiate cooling and heating cycles, respectively. The heating capacity of a commanded heating cycle is enhanced prior to switching to the heating cycle by connecting the outlet of the receiver to the second refrigerant circuit while maintaining the control valve cooling port active in the first refrigerant circuit for a predetermined time delay. This forces liquid refrigerant in the condenser to flow into the receiver and then into the second refrigerant circuit, making additional liquid refrigerant available to the heating cycle, which is initiated at the end of the predetermined time delay, without introducing liquid refrigerated directly into the accumulator.