Refrigerator and temperature measurement error correcting method of infrared sensor
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Solution Overview
Problem
Existing refrigeration control technologies in refrigerators have a slow response speed due to temperature measurement errors, leading to inefficient refrigeration and potential nutrient loss in stored articles.
Innovation Solution
A temperature measurement error correcting method using an infrared sensor that acquires a correction constant by comparing its measurements with a standard temperature, allowing for accurate temperature measurement and improved refrigeration control by correcting for absolute errors in the infrared sensor's readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a temperature sensor is used to measure temperature inside the compartment, then the temperature measurement is simple, but the response speed is slow due to heat radiation time delay
Solution Approach 1:
The patent replaces the contact式 temperature sensor (mechanical/thermal system) with an infrared sensor (optical system) that measures temperature remotely through infrared radiation. This substitution eliminates the heat radiation time delay inherent in contact measurement, achieving fast response speed while maintaining measurement accuracy through infrared detection technology.
2Speed
If an infrared sensor is used for temperature measurement, then the response speed is fast, but there is an absolute error in temperature measurement
Solution Approach 1:
The patent employs a feedback mechanism where the infrared sensor's temperature measurements are continuously compared with actual temperature values obtained through correction. The correction value is calculated based on the difference between measured and actual temperatures, and this correction feedback is applied to subsequent measurements to eliminate absolute errors, thereby improving measurement precision while maintaining fast response speed.
Solution Approach 2:
The patent changes the measurement parameter by introducing a correction value that adjusts the raw infrared sensor readings. By modifying the temperature parameter through correction based on known actual temperatures, the system compensates for the infrared sensor's absolute error, transforming inaccurate measurements into accurate ones without sacrificing response speed.
3Productivity
If refrigeration control is based on delayed temperature sensing, then the control system is simple, but the refrigeration efficiency is low and nutrient loss occurs
Solution Approach 1:
The patent implements preliminary action by using the infrared sensor to detect temperature changes before they significantly affect the compartment environment. The fast response capability allows the system to anticipate temperature rises from newly stored articles and activate refrigeration control earlier, preventing nutrient loss and improving refrigeration efficiency without requiring complex control logic.
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 method enhances the accuracy of temperature measurement, enabling timely and efficient refrigeration control, reducing nutrient loss and improving the storage environment within the refrigerator.
Implementation Method 1
acquiring a measured value in the operation status by sensing a temperature of a preset region via the infrared sensor
Data Source
AI summary
Provided are a refrigerator, and a method for correcting temperature measurement errors of an infrared sensor including: verifying that the infrared sensor is running in an operating state; obtaining a measured operating-state value acquired by the infrared sensor sensing the temperature of a preset zone; obtaining a correction constant corresponding to the infrared sensor, the correction constant being obtained by means of a comparison between the value measured by the infrared sensor in a correction state and a standard temperature value; using the correction constant to correct the measured value and thus obtain a corrected temperature value. Using the method, the impact of an absolute error of the infrared sensor on temperature measurement is reduced; thus the accuracy of temperature measurement is improved, such that measured values directly reflect the actual temperature of the items inside a preset zone, and an accurate basis for control is provided for subsequent associated control.