Control circuit for air conditioner
US4557114A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1984 |
| Grant date | Dec 10, 1985 |
| Priority date | — |
| Expiry date | Jun 11, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F2140/60
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
In an air conditioner separated into an indoor unit and an outdoor unit, a control circuit comprises a three-phase power source connected in common to the indoor and outdoor units, and a signal line led out from two phases of the power source. A contact of an electromagnetic relay energizing a compressor of the air conditioner is connected on the portion of the signal line in the indoor unit in series with a current sensor sensing the current flowing through the signal line, and a contact of a protective relay protecting the compressor is connected on the portion of the signal line in the outdoor unit in series with the electromagnetic relay. A first controller is disposed in the indoor unit for controlling on-off of the relay contact of the electromagnetic relay, and a second controller is disposed in the outdoor unit for energizing the protective relay contact thereby controlling on-off of the compressor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.