Controller for air conditioner
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional air conditioner controllers face challenges in accurately determining room temperature due to heat generation within the controller housing and external air flow, leading to excessive correction errors when air flow is present.
Innovation Solution
A controller configuration that includes a heat source temperature sensor and an internal temperature sensor positioned away from the heat source, using a temperature difference to determine room temperature, and employing an influence coefficient to account for heat source temperature variations, allowing for accurate room temperature determination regardless of air flow conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is provided inside the controller housing to measure room temperature, then the controller can perform air-conditioning control based on room temperature, but the measured temperature becomes higher than the actual room temperature due to heat generation from internal components
Solution Approach 1:
The patent divides the temperature measurement function into two separate sensors: one dedicated to measuring heat source temperature (microcomputer temperature) and another for measuring internal housing temperature. This segmentation allows independent measurement of each temperature component, enabling accurate calculation of room temperature by compensating for heat source effects without interference between measurements.
Solution Approach 2:
The patent introduces an intermediary calculation process that uses the temperature difference between the heat source temperature sensor and internal temperature sensor to determine the heat generation amount. This intermediary value serves as a correction factor to accurately derive room temperature from the internal temperature measurement, effectively mediating between the harmful heat generation and accurate temperature measurement.
2Device complexity
If correction is performed using a fixed correction value based on assumed heat generation, then the calculation process is simplified, but the correction becomes excessive when air flow is present and reduces measurement accuracy
Solution Approach 1:
The patent implements dynamic adjustment of the correction value by continuously monitoring the temperature difference between the heat source temperature sensor and internal temperature sensor. Instead of using a fixed correction value, the system adapts the correction amount based on real-time thermal conditions, including the effects of air flow, thereby maintaining measurement accuracy under varying environmental conditions while keeping the calculation process relatively simple.
Solution Approach 2:
The patent establishes a feedback mechanism where the measured temperature difference between heat source and internal sensors is continuously fed back to adjust the correction value. This feedback loop enables the system to automatically compensate for changing thermal conditions such as air flow patterns, ensuring accurate room temperature determination without requiring complex predictive models or external sensors.
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 configuration enables precise room temperature measurement by isolating the influence of heat source temperature on internal temperature measurements, reducing correction errors and ensuring accurate air conditioner operation across varying environmental conditions.
Implementation Method 1
the housing contains a heat source such as a microcomputer that generates heat during operation
Implementation Method 2
the internal temperature sensor being configured to measure a temperature inside the housing as an internal temperature
Implementation Method 3
when an air flow is generated in a room where the controller is provided, the air flow removes heat from the housing
Data Source
AI summary
A controller according to an embodiment of the present disclosure is a controller for an air conditioner that performs air-conditioning according to room temperature, the controller comprises: a housing; a heat source temperature sensor disposed inside the housing, the heat source temperature sensor being configured to measure a temperature of a heat source that generates heat during operation as a heat source temperature; an internal temperature sensor disposed inside the housing at a position away from the heat source, the internal temperature sensor being configured to measure a temperature inside the housing as an internal temperature; and a control unit that determines the room temperature using a temperature difference between the measured heat source temperature and the measured internal temperature.