Heater control for spa

• US 5,932,127 A
• Filed: 01/15/1998
• Issued: 08/03/1999
• Est. Priority Date: 01/15/1998
• Status: Expired due to Fees

• Current Assignee: Harold D. Maddox
• Original Assignee: Harold D. Maddox
• Inventors: Maddox, Harold D.
• Primary Examiner(s): WAYNER, WILLIAM E
• Application Number:
  US09/007,734
• Time in Patent Office: 565 Days
• Field of Search: 4/541.2, 4/493, 219/492, 236/46 R
• US Class Current: 219/492
• CPC Class Codes: A61H 2201/0176 By stopping operation
• CPC Class Codes: A61H 33/005 Electrical circuits therefor
• CPC Class Codes: A61H 33/0087 Therapeutic baths with agitated or circulated water
• CPC Class Codes: A61H 33/0095 Arrangements for varying the temperature of the liquid

Abstract

A spa is maintained at a ready-to-use temperature by a daily heating cycle that is initiated by a filter cycle clock, which traditionally has been used only for programming the circulation of the spa water through a filter. Once a daily heating cycle has been initiated, it normally concludes only when the temperature of the spa water reaches a desired temperature that the user has preset into a thermostat. However, for safety the heating cycle is terminated immediately in the event the heater temperature becomes excessive, since this event could result from lack of water or inadequate circulation.

Claims

1. A method of controlling the operation of a spa heater comprising the steps of:

turning the heater on at a preset time each day as determined by the filtration cycle clock, and turning the heater on anytime the user actuates a particular switch; and

,

turning the heater off when a preset water temperature has been reached as determined by a water temperature sensor, and turning the heater off when the temperature of the heater exceeds a preset temperature, as determined by a heater temperature sensor.