Recirculation hot water system
US5205318A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1992 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Jul 21, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/85978
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
Recirculation hot water system including a fluid delivery system used to supply potable water throughout a home or other facility, having a hot water supply pipe, a cold water supply/return pipe, a hot water heater, a pump, a manifold, a control system, a hot water and cold water faucet or valve, and a demand site (typically a sink or wash basin). The manifold further includes a thermostatic actuator and a check valve. The control means further includes a sending unit, installed in close proximity to the demand site, and a receiving unit, installed in close proximity to the heater. Command signals are transferred, from the sending unit to the receiving unit, via modulated signals that pass through the AC power lines that are used to distribute power throughout the home or facility. The main potable water supply is bifurcated into the hot water and cold water supply pipes with the heater installed in the hot water supply pipe upstream of the manifold, and the pump installed between the heater and the manifold and in close proximity to the heater. The hot and cold water supply pipes are in fluid communication with separate inlets to the manifold. An outlet from the manifold is in flu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.