Spa-domestic hot water heat exchanger
OwnerLarry D. Whitaker, Donald M. Herriottinventors
Life of this patent
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Abstract
A first heat exchanger loop incorporates a thermostatically controlled circulating pump which draws hot water from the heater. Spa water is circulated by the spa pump through a second heat exchange loop surrounding the first. The thermostat sensor detects spa temperature when the spa pump is on and detects heater temperature, and therefore automatically shuts off the circulating pump, when the spa pump is off.
Claims9
A heat exchanger system for installation adjacent a source of hot water and for transfer of heat to a quantity of water remote from said source of hot water, said heat exchanger system comprising:
- a first heat exchange loop comprising a water passage and a heat exchange surface,
- a second heat exchange surface,
- a second heat exchange loop adapted to be connected to receive water circulated from the quantity of water remote from the source of hot water and comprising a water passage surrounding a substantial portion of the length of said first heat exchange surface,
- circulation means connected to said first heat exchange loop for drawing water from and returning water to the source of hot water,
- thermostat means in thermal communication with said second heat exchange loop at a portion thereof that surrounds said first heat exchange loop for detecting the temperature of the water in said second heat exchange loop and turning off said circulation means when a pre-set temperature is reached, and for detecting the temperature in said first heat exchange loop in the absence of circulation in said second heat exchange loop, and shutting off said circulation means.
A heat exchanger system for installation adjacent a source of hot water and for transfer of heat to a quantity of water remote from said source of hot water, said heat exchanger system comprising:
- a first heat exchange loop comprising tubing forming a water passage and a heat exchange surface,
- a second heat exchange loop comprising a water passage surrounding a substantial portion of the length of said first heat exchange surface,
- circulation means connected to said first heat exchange loop for drawing water from and returning water to the source of hot water,
- said second heat exchange loop being terminated on said first heat exchange loop with a T-connection sealed by a compression fitting received over the outer diameter of said tubing comprising said first heat change loop.
Dependencies are inferred from the claim text.