Bimetal Temperature Controller With Anti-Premature Reset Heating
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Solution Overview
Problem
Existing temperature controllers using bimetallic sheets can reset prematurely, leading to potential safety hazards as the bimetallic sheet returns to its original shape, causing the movable and static contacts to reconnect even if the hazard has not been fully mitigated.
Innovation Solution
A temperature controller design that includes a bimetallic sheet, a contact conductive mechanism, and a heating element. When the bimetallic sheet is deformed by heat, it drives the movable contact assembly away from the static contact assembly, allowing current to pass through the heating element, which maintains the deformation and prevents the controller from resetting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bimetallic sheet is used to drive contact separation when deformed by heat, then the circuit can be disconnected for protection, but the bimetallic sheet may return to its original shape when temperature drops causing premature reset
Solution Approach 1:
The heating element is activated in advance to maintain the bimetallic sheet in a deformed state, preventing the movable and static contacts from reconnecting even when the temperature drops. This preliminary heating action ensures the contact separation state is maintained until the hazard is fully resolved.
Solution Approach 2:
The heating element continues to generate heat to sustain the bimetallic sheet's deformation continuously, ensuring the contact remains separated. This continuous useful action prevents the bimetallic sheet from recovering its original shape and causing premature reset.
2Ease of operation
If the movable contact and static contact are allowed to reconnect when temperature drops, then the controller can reset automatically, but safety cannot be guaranteed when hazard persists
Solution Approach 1:
The system uses temperature feedback to control the heating element. When the temperature drops and the bimetallic sheet tends to recover, the heating element is activated to maintain the deformed state. This feedback mechanism ensures automatic reset only occurs when safe, preventing premature reset while hazards persist.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design ensures that the temperature controller remains in a safe state by preventing premature reset, thereby enhancing user safety by maintaining the separation of the movable and static contacts until the hazard is fully resolved.
Implementation Method 1
a bimetallic sheet is arranged on the mounting body, and the bimetallic sheet, when being deformed by heat, is capable of driving the movable contact assembly away from the static contact assembly
Implementation Method 2
heat generated by the heating element keeps the deformation of the bimetallic sheet, thereby preventing the temperature controller from resetting
Data Source
AI summary
A temperature controller is disclosed, including: a mounting body provided with a first electrical connecting terminal and a second electrical connecting terminal, where a contact conductive mechanism and a heating element are arranged in parallel between the first electrical connecting terminal and the second electrical connecting terminal, the contact conductive mechanism includes a static contact assembly arranged at the first electrical connecting terminal and a movable contact assembly arranged at the second electrical connecting terminal, a bimetallic sheet is arranged on the mounting body, and the bimetallic sheet, when being deformed by heat, is capable of driving the movable contact assembly away from the static contact assembly to enable conduction of the heating element.