Fast recovery circuit for heat pump water heater

Details Fast recovery circuit for heat pump water heater Fast recovery circuit for heat pump water heater

1993-08-23

1996-02-27

Leung, Philip H.

Electric resistance heating devices

Heating devices

Tank or container type liquid heater

392454, 392308, 219510, 165 29, H05B 378, F24H 120

Patent

active

054955513

ABSTRACT:
An external circuit that works in conjunction with the existing tank thermostatic controls to control both a water heating heat pump and the existing resistance elements in a water heater. The existing resistance elements are disabled to allow the heat pump to heat the water unless a large volume of hot water is quickly withdrawn whereupon the upper resistance element is re-enabled to heat the water for a faster recovery rate.

REFERENCES:
patent: 2157910 (1939-05-01), McCormick
patent: 3241603 (1966-03-01), Nagata
patent: 4540874 (1985-09-01), Shaffer, Jr. et al.
patent: 4543468 (1985-09-01), Shaffer, Jr. et al.
patent: 4740673 (1988-04-01), Robinson, Jr.

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