Refrigerator and method for controlling same
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Solution Overview
Problem
Existing refrigerators struggle to quickly adjust cooling apparatus output in response to rapid temperature changes and often result in inefficient power consumption due to fixed sampling intervals, leading to fluctuations in storage space temperature.
Innovation Solution
A refrigerator system that adjusts cooling apparatus output based on real-time temperature differences and set temperature deviations, using variable sampling intervals and control gain values to maintain a constant storage space temperature, thereby reducing power consumption and restoring temperature stability quickly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a fixed predetermined time interval is used for temperature sensing, then the cooling apparatus output is not quickly adjusted in response to rapid temperature changes, but the system maintains stable operation with simpler control logic
Solution Approach 1:
The patent applies dynamics by making the sampling time interval variable rather than fixed. The controller dynamically adjusts the sampling interval based on temperature conditions: using a first sampling interval when temperature deviation exceeds a reference value, and a second sampling interval when it remains within the reference value. This dynamic adjustment enables quick response to rapid temperature changes while maintaining stable operation during normal conditions.
2Use of energy by stationary object
If temperature sensing is performed at regular time intervals, then the control system is simple to implement, but power consumption increases due to unnecessary frequent sampling when temperature is stable
Solution Approach 1:
The patent implements dynamic sampling interval adjustment to optimize both power consumption and response time. When the temperature deviation exceeds the reference value, the system uses a shorter first sampling interval to quickly detect changes. When temperature remains stable within the reference value, the system switches to a longer second sampling interval, reducing unnecessary sampling operations and lowering power consumption.
3Reliability
If the sampling time is fixed, then the control logic is simpler, but the system cannot quickly restore temperature stability when temperature deviates from set point
Solution Approach 1:
The patent employs dynamic sampling interval adjustment where the controller switches between a first sampling interval (shorter) when temperature deviation exceeds the reference value, and a second sampling interval (longer) when it remains within the reference value. This dynamic approach enables quick restoration of temperature stability during deviations while maintaining simpler control logic during stable operation.
4Measurement precision
If frequent temperature sampling is performed, then rapid temperature changes are detected quickly, but power consumption increases due to continuous cooling apparatus operation
Solution Approach 1:
The patent applies dynamic sampling interval adjustment to balance measurement precision and power consumption. The controller uses a first sampling interval (shorter) when temperature deviation exceeds the reference value to ensure precise monitoring during critical periods. When temperature remains stable within the reference value, the controller switches to a second sampling interval (longer), reducing the frequency of sampling operations and thereby lowering power consumption.
Data Source
AI summary
A refrigerator of the present embodiment includes: a cabinet having a storage compartment; a cooling apparatus which operates to cool the storage compartment; a temperature sensor for sensing a temperature of the storage space at a set time interval; and a controller for controlling the cooling apparatus, wherein the controller adjusts an output of the cooling apparatus on the basis of at least one of a first factor which is a difference value between a previous temperature of the storage compartment and a current temperature of the storage compartment and a second factor which is a difference value between a predetermined set temperature and a current temperature of the storage compartment, and adjusts the set time interval on the basis of at least one of the first factor and the second factor.