Hot air gun
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Solution Overview
Problem
Conventional hot air guns face inaccuracies in temperature sensing due to temperature differences between the air outlet and the work area, and existing solutions for improving sensing precision are inconvenient to tune, requiring both hands.
Innovation Solution
A hot air gun design with a temperature sensing arrangement rotatably connected to a hand guard, featuring a tuning element that extends towards the handle, allowing single-handed adjustment and enhanced precision through an elastic member and limiting groove configuration, enabling precise angle tuning and stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the temperature sensing arrangement is mounted on a universal joint via a cantilever to improve sensing precision, then the sensing precision is improved, but the device complexity increases and both hands are required for tuning
Solution Approach 1:
The tuning function is extracted from the complex universal joint mechanism and integrated into the handle through a dedicated tuning element. This separates the sensing function (infrared sensor on universal joint) from the adjustment function (tuning element on handle), allowing independent optimization of each.
Solution Approach 2:
A tuning element is introduced as an intermediary component between the user's hand and the temperature sensing arrangement. This mediator transmits rotational motion from the handle to the universal joint, enabling easy adjustment without directly manipulating the complex joint mechanism.
2Measurement precision
If the infrared temperature sensor is mounted on the universal joint to sense the work area temperature, then the sensing precision is improved, but the ease of operation deteriorates due to requiring both hands for tuning
Solution Approach 1:
The device is segmented into distinct functional zones: the handle contains the tuning element for adjustment, the universal joint provides rotational movement, and the infrared sensor performs sensing. This segmentation allows each component to be optimized for its specific function while working together as a unified system.
Solution Approach 2:
The tuning element is positioned on the handle such that it can be adjusted by the user's own hand while holding the device. This self-service design eliminates the need for a second hand or tool, allowing the user to independently adjust the sensing angle during operation.
3Device complexity
If the temperature sensing arrangement is fixed at the air outlet to simplify the structure, then the device complexity is reduced, but the measurement precision deteriorates due to temperature difference between air outlet and work area
Solution Approach 1:
The temperature sensing arrangement is made dynamic through the universal joint mechanism, allowing it to rotate and point towards the work area. This dynamic positioning capability enables the sensor to directly measure work area temperature rather than relying on indirect measurement at the air outlet, significantly improving measurement accuracy.
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
Enables single-handed tuning for improved temperature sensing precision and heating efficiency, reducing skewing and enhancing the uniformity of heating, while protecting the temperature sensing arrangement and extending its service life.
Implementation Method 1
the temperature sensing arrangement is connected to an elastic member which enables the temperature sensing arrangement to maintain a tendency of abutting against the tuning element
Data Source
AI summary
A hot air gun includes a gun body, the gun body including a handle and a hand guard disposed at a front side of the handle, the gun body being provided with a hot air assembly and a temperature sensing arrangement, the hot air assembly including a heat generating assembly for generating hot air and a hot air tube for blowing the hot air towards a work area, the temperature sensing arrangement being configured to sense temperature of the work area, where the temperature sensing arrangement is rotatably connected to the hand guard, the hand guard is provided with a tuning element for tuning a sensing angle of the temperature sensing arrangement, and the tuning element extends towards the handle relative to the hand guard. The disclosure is mainly used to tune the temperature sensing arrangement via a single hand.