Insulated Wire Connection Sleeve Structure for Fire-Prone Air Fryers
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Solution Overview
Problem
Existing wire connections in cooking appliances, such as air fryers, are prone to loose connections and excessive resistance, leading to high circuit temperatures that can cause fires.
Innovation Solution
A wire connection protection device comprising a rigid insulating sleeve and a fire sleeve is used to stabilize the connection between internal and power wires, with the fire sleeve providing additional insulation to prevent fire spread.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wires are connected manually or mechanically without protection, then the connection process is simple, but the connection stability deteriorates causing excessive gaps and loose connections
Solution Approach 1:
The patent employs nested protective structures where the rigid insulating sleeve is inserted into the fire sleeve, creating a multi-layer protection system. The rigid insulating sleeve directly contacts and stabilizes the wire connection, while the fire sleeve provides external protection, forming a nested configuration that enhances connection stability without complicating the manufacturing process
Solution Approach 2:
The rigid insulating sleeve acts as an intermediary element between the wire connection and the external environment. It provides mechanical support to eliminate excessive gaps and stabilize the connection, while the fire sleeve serves as an additional intermediary layer providing thermal protection, thus resolving the contradiction between simple connection and stable connection
2Device complexity
If wires are connected without insulation protection, then the device structure is simple, but the temperature control deteriorates causing high circuit temperatures and fire hazards
Solution Approach 1:
The patent uses composite material structures combining rigid insulating material and fire-resistant material in two distinct layers. The rigid insulating sleeve provides electrical insulation and structural support, while the fire sleeve provides thermal resistance and fire protection. This composite approach effectively controls circuit temperature and prevents fire hazards while maintaining relatively simple device structure
Solution Approach 2:
The fire sleeve provides beforehand cushioning against thermal hazards by being pre-installed over the rigid insulating sleeve. This protective layer is in place before any potential overheating or fire can occur, cushioning the wire connection from thermal damage and preventing fire spread, thus resolving the temperature control issue without significantly increasing device complexity
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
The device enhances structural stability and prevents fires by insulating the connection, reducing the risk of loose connections and heat buildup, thereby improving safety and robustness.
Implementation Method 1
a rigid insulating sleeve, adapted to be sleeved over the connection between the internal wire and the power wire
Implementation Method 2
a fire sleeve, sleeved over the rigid insulating sleeve... the fire sleeve prevents the connection from heating up and catching fire
Data Source
AI summary
The present application discloses a wire connection protection device of a cooking appliance and an air fryer. The wire connection protection device includes a rigid insulating sleeve sleeved over the connection between the internal wire and power wire of the cooking appliance, with both ends of the rigid insulating sleeve being sleeved over the outside of the outer sheath of the internal wire and the power wire, and a fire sleeve sleeved outside the rigid insulating sleeve. The rigid insulating sleeve improves the structural stability of the connection between the internal wire and the power wire such that it does not loosen easily. The fire sleeve prevents the connection from heating up and catching fire. The rigid insulating sleeve and the fire sleeve collectively insulate the heat source from the inside to prevent the fire from spreading, so as to improve the safety at the wire connection.