Water heater control system
US4413775A · kind A · utility
Inventor
Key dates
| Filing date | Jul 12, 1982 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | Jul 12, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/275
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A water heater control system designed to conserve energy, in part by anticipating hot water demand as a function of usage, utilizes refined design features to effectively automatically switch the water heater's thermostat between a high and a low setting in response to actual use of hot water and the heat of the water at the moment. The basic purposes of the invention are first, the prevention of the system from switching into the "high" mode when in fact adequate hot water is still present in the tank, and second, the reduction of the length of the burner firing time at times when a long burn is not necessary. These features include a specialized heat sensor switch which permits the trigger temperature of the switch to follow the seasonal temperature of the incoming water, also a stack gas switch for further refining the system's function. Remote control and a special mounting means are also included in the refined control system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.