Transport refrigeration system having means for enhancing the capacity of a heating cycle
US5056324A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1991 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Feb 21, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D29/003
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.