Ice-Making Chamber Fan Control for Refrigerator Frost Prevention
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Solution Overview
Problem
Frost formation in the ice making chamber of direct cooling type ice making units in refrigerators is a significant issue due to the large temperature difference between the ice making unit and the air, leading to inefficient ice production and potential damage.
Innovation Solution
A control method that involves determining the temperature of the ice making chamber and adjusting the operation of the ice making chamber circulation fan to prevent frost formation by ensuring the temperature of the ice making tray and drain duct equals the air temperature, using both low and high modes based on refrigerant flow and chamber fullness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct cooling type ice making unit is used to achieve high cooling speed and simple ice making mechanism, then cooling efficiency is improved, but temperature difference between ice making unit and air increases causing frost formation
Solution Approach 1:
The circulation fan operates periodically based on temperature conditions. When the ice making chamber temperature drops below the predetermined temperature (indicating refrigerant flow interruption), the fan activates to circulate air and equalize temperatures. When temperature rises above the threshold, the fan stops. This periodic operation prevents continuous energy consumption while effectively preventing frost formation during critical periods.
Solution Approach 2:
The system changes the operational parameters of the circulation fan based on temperature conditions. The fan speed and operation mode are adjusted according to whether the chamber temperature is below or above the predetermined threshold, and whether the chamber is full of ice. This dynamic parameter adjustment optimizes both frost prevention and energy efficiency.
2Object-affected harmful factors
If circulation fan is driven continuously to prevent frost formation, then frost prevention is improved, but energy consumption increases
Solution Approach 1:
The circulation fan operates periodically based on temperature conditions. When the ice making chamber temperature drops below the predetermined temperature (indicating refrigerant flow interruption), the fan activates to circulate air and equalize temperatures. When temperature rises above the threshold, the fan stops. This periodic operation prevents continuous energy consumption while effectively preventing frost formation during critical periods.
Solution Approach 2:
The system uses the temperature condition itself as the trigger for fan operation. The temperature sensor automatically detects when the chamber temperature drops below the predetermined threshold and initiates fan operation without external intervention. This self-regulating mechanism ensures frost prevention while minimizing unnecessary energy consumption.
3Speed
If high fan speed is used to equalize temperature quickly, then temperature equalization speed is improved, but energy consumption and noise increase
Solution Approach 1:
The circulation fan speed is dynamically adjusted based on operational conditions. The system switches between high speed mode (when chamber is not full of ice and rapid equalization is needed) and low speed mode (when chamber is full of ice and gentle circulation suffices). This dynamic speed adjustment optimizes the balance between temperature equalization efficiency and energy consumption.
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
Effectively prevents frost formation by maintaining uniform air circulation and temperature equality within the ice making chamber, enhancing ice production efficiency and reducing the risk of damage.
Implementation Method 1
an ice making chamber circulation fan to circulate air in the ice making chamber
Implementation Method 2
an ice making chamber refrigerant pipe to supply cool air to the ice making tray
Implementation Method 3
freeze water into ice
Data Source
AI summary
A control method of a refrigerator to prevent frost from being formed in an ice making chamber. The refrigerator includes an ice making chamber refrigerant pipe to supply a refrigerant to make ice in a direct cooling manner and an ice making chamber circulation fan to create a forced air stream to circulate air in the ice making chamber. The control method includes determining whether temperature of the ice making chamber is lower than a predetermined temperature and driving the ice making chamber circulation fan in a state in which the temperature of the ice making chamber is lower than the predetermined temperature and the refrigerant flows in the ice making chamber refrigerant pipe or when flow of the refrigerant in the ice making chamber refrigerant pipe is interrupted in a state in which the temperature of the ice making chamber is lower than the predetermined temperature.