Tri-level multi-cylinder reciprocating compressor heat pump system
US4197719A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 2, 1978 |
| Grant date | Apr 15, 1980 |
| Priority date | — |
| Expiry date | Mar 2, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2600/026
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A multi-cylinder reciprocating compressor is automatically controlled in terms of two speed operation and selective utilization of the cylinders under single stage action to meet heating and cooling loads by way of a two step indoor thermostat and an outdoor thermostat. The compressor may supply energy to storage during heating and cooling or receive energy therefrom with the storage coil selectively loop connected to the outside or indoor coils. Subcooling return is directed to a specific cylinder and overrides refrigerant return vapor to that cylinder from other coils functioning as evaporators. Solenoid operated valves effect unloading of the compressor during start up and automatically effect removal or inclusion of selected cylinders to the single stage compressor operation. Automatic load responsive control of compressor drive motor speed is effected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.