Heat exchanger for recovery of heat from a spa or hot tub pump m

Details Heat exchanger for recovery of heat from a spa or hot tub pump m Heat exchanger for recovery of heat from a spa or hot tub pump m

1991-01-17

1992-12-22

Ford, John

Heat exchange

Structural installation

165168, 165169, 417366, 417370, 41742312, 4174238, 4545, 45412, 310 54, 310 64, F28F 700, H02K 900, H02K 902, F04B 1700

Patent

active

051727544

ABSTRACT:
A heat exchanger coil for heating water in a spa or hot tub by transferring heat generated by an electric motor driving a pump to the water in the coil while the pump circulates the water through the spa or hot tub. A restrictor mounted on the shaft of the electric motor creates additional friction between its outer surface and the inner surface of the motor seal to further warm the water.

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patent: 3841791 (1974-10-01), Doolin
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patent: 4516915 (1985-05-01), Jensen et al.
patent: 4850818 (1989-07-01), Kotera
patent: 4854373 (1989-08-01), Williams
patent: 4858254 (1989-08-01), Popovich et al.

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