Resistive water sensor for hot tub spa heating element

Details Resistive water sensor for hot tub spa heating element Resistive water sensor for hot tub spa heating element

H - Electricity

02

H

H02H 5/08 (2006.01) A61H 33/00 (2006.01) A61H 33/02 (2006.01) H01H 35/18 (2006.01) H05B 1/02 (2006.01)

Patent

CA 2357641

A dry fire protection system for a spa and the spa's associated equipment. A heating element heats the spa's water. A resistive water level sensor senses that the level of water around the heating element is higher than a predetermined height or lower than a predetermined height, and a heating element deactivation device electrically deactivates the heating element when the water level around the heating element falls below a predetermined level. In a preferred embodiment, the heating element deactivation device is an electric circuit comprising a comparator circuit and a control circuit.

Il s'agit d'un système de protection contre la mise sous tension à sec pour une cuve thermale et pour l'équipement associé. Un élément chauffant chauffe l'eau de la cuve thermale. Un capteur de niveau d'eau résistif détecte que le niveau de l'eau autour de l'élément chauffant est plus élevé qu'une hauteur prédéterminée ou plus basse qu'une hauteur prédéterminée. Un dispositif de désactivation de l'élément chauffant désactive ledit élément, lorsque le niveau de l'eau autour de l'élément chauffant tombe en dessous d'un niveau prédéterminé. Dans une version préférée, le dispositif de désactivation de l'élément chauffant est un circuit électrique qui comprend un circuit comparateur et un circuit de commande.

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