Control device for heating appliance having two operating regimes

• US 4,912,300 A
• Filed: 08/05/1988
• Issued: 03/27/1990
• Est. Priority Date: 12/10/1986
• Status: Expired due to Fees

• Current Assignee: SEB SA
• Original Assignee: SEB SA
• Inventors: Hennuy, Jean, Wojcik, Guy
• Primary Examiner(s): Leung, Philip H.
• Assistant Examiner(s): Gaffin, Jeffrey A.
• Application Number:
  US07/246,669
• Time in Patent Office: 599 Days
• Field of Search: 219/364, 219/369, 219/370, 219/483, 219/486, 219/487, 219/511
• US Class Current: 392/365
• CPC Class Codes: F24H 15/156 Reducing the quantity of energy consumed; Increasing efficiency
• CPC Class Codes: F24H 15/176 Improving or maintaining comfort of users
• CPC Class Codes: F24H 15/254 Room temperature
• CPC Class Codes: F24H 15/37 of electric heaters
• CPC Class Codes: F24H 3/0417 portable or mobile
• CPC Class Codes: F24H 9/2071 using electrical energy supply
• CPC Class Codes: G05D 23/1912 whose output amplitude can take more than two discrete values
• CPC Class Codes: G05D 23/275 with sensing element expanding, contracting, or fusing in response to changes of temperature

Abstract

The control device (25) comprises a thermostat (15) interconnected between a supply source (S) and a heating resistor (4) which comprises two heating elements (41, 42), one of which (42) is supplied only during one of the heating regimes. A temperature limiter (18) is interconnected between the source (S) and the heating element (42). This temperature limiter is sensitive to the heat produced by a resistor (17) having a high resistance value so as to cut-off the supply of said heating element (42) at the time of initial opening of the switch (15a) of the thermostat (15). The device (25) is particularly applicable to electric convectors having a natural convection regime and a blowing regime.

Claims

1. Control device for electric heating apparatus, comprising two heating resistors (41, 42), a supply source (S) for said heating resistors, a thermostat (15a) having two terminals (A, B), one of said terminals being connected to said supply source (S) and the other said terminal (B) being connected to one (41) of said heating resistors, a first temperature limiter (18) having two terminals, one of said terminals being connected to said supply source (S) and the other said terminal (D) being connected to the other said heating resistor (42), a third heating resistor (17) being connected between said other terminal (B) of the thermostat (15a) and said other terminal of said first temperature limiter (18), a second temperature limiter (16) being connected between said third resistor (17) and said other terminal (B) of the thermostat (15a), said two temperature limiters (16, 18) being resettable in closed position and being sensitive to the heat of said third resistor (17) when it is traversed by a current, said third resistor (17) having an ohmic value such that said third resistor (17) is traversed by a negligible current when said thermostat (15a) is closed, and when said thermostat is open to heat said temperature limiters (16, 18) to open said limiters and cut-off the supply of said two heating resistors (41, 42).

2. Control device for electric heating apparatus, comprising two heating resistors (41, 42), a supply source (S) for said heating resistors, a thermostat (15a) having two terminals (A, B), one of said terminals being connected to said supply source (S) and the other said terminal (B) being connected to one (41) of said heating resistors, a relay (20) that can be reset by a resetting button (30), said relay being interconnected between said other terminal (B) and said other heating resistor (42), said relay (20) having a relay coil (22) connected in parallel with said other heating resistor (42), said relay coil (22) maintaining said relay in closed position when it is supplied with current.