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Improvements relating to thermal control units

A controller and thermal response technology, applied in thermal switches, thermal switch parts, electric switches, etc., can solve problems such as negating design investment

Inactive Publication Date: 2009-01-28
OTTER CONTROLS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one factor to consider is the investment in these existing controllers
Such a solution negates the design investment in the existing controller when it is possible to redesign a new controller

Method used

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  • Improvements relating to thermal control units
  • Improvements relating to thermal control units
  • Improvements relating to thermal control units

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Figures 1a, 1b and 1c are schematic representations of the thermal control unit described in the aforementioned British Patent No. 2194099.

[0026] This control unit is the aforementioned X1 controller unit, and its structure and operation are described in detail in British Patent No. 2194099 and will not be repeated here. It is sufficient that in using said controller, connecting said controller to the heating element head 24 causes the bimetallic sheet 22 to come into close thermal contact with it with the surface of the extruded element head and causes the sheet carrier 21 to pass through the The spring bias created by the abutment of the posts 52, 53 provided on the carrier with the portions 58, 60 of the inner springs 32, 33 of the controller pushes the controller inwardly. This inward movement of the carrier in turn causes the springs 58, 60 to come into contact with the electrical terminals 28, 29 of the controller. The push rod 23 is connected to the bimetal 2...

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PUM

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Abstract

A thermally responsive control for a liquid heating vessel comprising a snap acting bimetallic actuator (104), a trip lever (102) pivotally mounted to be responsive to operation of said bimetallic actuator (104) and switch means operated by said trip lever, characterised in that said switch means includes a member (116) urged with a spring force into contact with a part (120) of said trip lever and having a cam surface (132) which is traversed by said part during pivotal movement of the trip lever to develop switch-actuating movement.

Description

technical field [0001] The present invention relates generally to the improvement of thermal control units, in particular - but also not exclusively - for liquid heating vessels such as pots, jugs, urns, pans and the like. [0002] A preferred embodiment of the invention is particularly useful in a thermal control unit of an electric liquid heating vessel, which is operable to interrupt the power supply to the heating element in the vessel in the event of a so-called "element overheating" condition. Such conditions may occur under circumstances in which elements of the container are powered when there is not sufficient liquid in the container, or the container is allowed to boil dry. This type of controller is typically known as a "dry-boil" or "element overheat" controller. The invention relates particularly but not exclusively to the addition of a steam control to a dry boil control so that in addition to its element protection function, the control will also close the vess...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H37/54A47J27/21H05B1/02
CPCA47J27/21125H05B1/0213H01H37/5418
Inventor 罗伯特·安德鲁·奥赖尔
Owner OTTER CONTROLS LTD