Control system for an electrical heating device, and particularly for an electrical sauna stove

• US 3,892,946 A
• Filed: 09/25/1973
• Issued: 07/01/1975
• Est. Priority Date: 09/26/1972
• Status: Expired due to Term

• Current Assignee: Pentti Ilmari Rimmi
• Original Assignee: Pentti Ilmari Rimmi
• Inventors: Rimmi, Pentti Ilmari
• Primary Examiner(s): Miller, J. D.
• Assistant Examiner(s): Bell, Fred E.
• Application Number:
  US05/400,622
• Time in Patent Office: 644 Days
• Field of Search: 219/483,484,485,486 307/33
• US Class Current: 219/486
• CPC Class Codes: F24H 1/00 Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters steam boilers F22B
• CPC Class Codes: H05B 1/0208 actuated by the expansion or evaporation of a gas or liquid

Abstract

A control system for an electrical heating device and in particular for an electrical sauna stove. The system comprises three heating resistances or groups of heating resistances connected to different phases as well as a coil switch arrangement which can be controlled by means of a control switch and possibly by means of a temperature limiter. A temperature controller has been arranged so as to connect and disconnect, respectively, the loads of the different resistances stepwise, for example, with intervals of 5* to 10*C. Each of the said loads consists of a resistance connected to one phase or of a part of such resistance. The temperature controller consists of an at least three-pole controller arrangement for each phase and the coil switch arrangement consists of one three-pole coil switch connected in series with the controller arrangement.

Claims

1. A control system for an electrical heating device, and particularly for an electrical sauna stove, comprising:

three heating resistance arrangements adapted for being connected to three different phases, respectively, a coil switch arrangement comprising one three-pole coil switch, a control switch controlling said coil switch arrangement, a temperature controller connected in series with said coil switch arrangement and comprising an at least three-pole controller arrangement for each phase and arranged so as to connect and disconnect in stepwise manner, with certain preselected temperature intervals, the component loads of said respective resistance arrangements, said temperature controller being placed inside the heating device.

2. A control system in accordance with claim 1 wherein the coil switch arrangement is placed in the heating device.

3. A control system in accordance claim 1 wherein the control switch is a clock device.

4. A control system in accordance with claim 1, in which the coil switch arrangement and the control switch thereof are constituted by a multi-pole switch.

5. A control system as claimed in claim 1, further comprising a temperature limiter means for the control of the coil switch arrangement.