Apparatus and method for controlling compressor, and refrigerator having the same
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Solution Overview
Problem
Existing compressor control systems face challenges in efficiently controlling the operation of two compressors in a refrigerator, particularly in varying the compression ratio and managing voltage loads to prevent piston collisions and ensure proper compression, especially when using reciprocating compressors.
Innovation Solution
A compressor control apparatus utilizing two alternating current (AC) switches, driven by control signals based on compressor loads, allows for simultaneous or separate operation of the compressors, with a control unit varying the firing angle to adjust the freezing capacity and frequency, and includes a DC power supply for efficient power conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single inverter is used to control two compressors, then device complexity is reduced, but control precision and reliability deteriorate
Solution Approach 1:
The patent divides the control system into two independent AC switches (first AC switch and second AC switch), each independently controlling one compressor. This segmentation allows each compressor to have dedicated control while still using a unified control unit, thereby maintaining reliability without requiring two separate inverters.
2Adaptability or versatility
If the firing angle is varied to adjust freezing capacity, then adaptability improves, but control complexity increases
Solution Approach 1:
The patent implements dynamic control by varying the firing angle of the AC switches based on compressor load conditions. The control unit adjusts the firing angle in real-time to match the required freezing capacity, enabling flexible adaptation to different operating conditions through a relatively simple control mechanism.
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 solution minimizes system complexity and cost while enhancing compressor capacity and operation efficiency by allowing multiple operation modes based on load and freezing capacity, and simplifies the configuration of the system.
Implementation Method 1
For the linear motor, the motor itself directly generates a linear driving force, and thus a mechanical conversion device is not required
Implementation Method 2
The recipro type reciprocating compressor is a scheme in which a crank shaft is coupled to a rotating motor and a piston is coupled to the crank shaft, thereby converting a rotational movement into a linear reciprocating movement
Data Source
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Figure 3A~3B
AI summary
There is disclosed herein a compressor control apparatus, and a refrigerator (700) including the same. According to the embodiments of the present disclosure, the operation of two compressors (C1, C2) may be controlled using an alternating current (AC) switch, thereby minimizing the use of elements as well as increasing the compressor capacity and enhancing the operation efficiency of a system. According to the embodiments of the present disclosure, a plurality of operation modes may be used to correspond to a load or freezing capacity using two compressors (C1, C2) . Furthermore, according to the present disclosure, two compressors (C1, C2) may be operated in a separate or simultaneous manner using a drive configured with two alternating current (AC) switches, thereby simplifying the configuration of a system to reduce the cost.