Patent ID: 8973176
Filing Date: 2015-03-10
Classification: A61H,E04H,F24D,F24H,G05D,Y02B

Abstract:
1. In a spa or pool water temperature control system, the combination comprising, a) a water flow pump, having a motor, b) the pump operating to transfer heat generated by the pump motor to the water flowing through the pump, and to the spa or pool, c) a hi-limit temperature sensor located to detect the temperature of the pumped water, d) a temperature sensor operatively connected in controlling relation with the pump, in close proximity to the aforementioned hi-limit sensor to effect accurate sensing of the pumped water temperature, e) a control system that monitors said sensors and provides for manual pump activation as well as thermostatic control of the water temperature, power to the pump motor being turned off if the temperature of the pumped water exceeds a hi-limit detected by the hi-limit sensor, f) there being water flow coils proximate said motor, said coils receiving a first portion of water flow from the pump output, and delivering heated water to the pump, the pump also connected to receive water delivery from the spa, or pool, at least one of said coils being directly wrapped around the pump motor to receive heat therefrom, in endwise spaced relation from the pump, g) both the hi-limit temperature sensor c) and the temperature sensor d) being located in series in the path of a second portion of the flow from the pump and return to the pool or spa, and at the output side of the pump, both of said sensors being spaced from the pump to be out of direct contact therewith, both sensors being in heat transfer contact with one portion of the flow from the pump, and the coils being in heat transfer contact with another and separate portion of the flow from the pump.