Dual-Compressor Refrigeration Control for Precise Cabinet Cooling
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Solution Overview
Problem
Existing refrigerating apparatuses face challenges in accurately controlling internal temperatures while minimizing the number of compressor activations, leading to increased power consumption and reduced component lifespan due to frequent compressor operations.
Innovation Solution
A refrigerating apparatus with two refrigerant circuits and a temperature sensor that controls the compressors to alternate between two-compressor and one-compressor operations based on detected temperature thresholds, optimizing compressor usage to maintain temperature within a preset range while reducing activation frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If both compressors are operated frequently to maintain temperature accuracy under increased internal load, then temperature control precision is improved, but compressor activation frequency increases leading to higher power consumption and reduced component lifespan
Solution Approach 1:
The patent implements dynamic compressor control by switching between two operational modes: a first control mode where both compressors operate alternately to maintain temperature under normal conditions, and a second control mode where only one compressor operates when internal load increases. This dynamic adjustment of compressor operation based on thermal conditions resolves the contradiction by adapting system behavior to actual needs, reducing unnecessary compressor activations and power consumption while maintaining temperature control precision.
Solution Approach 2:
The control device changes operational parameters by detecting temperature variations and switching between different control modes. When the temperature indicates increased internal load, the system transitions from alternating dual-compressor operation to single-compressor operation, thereby changing the operational state to reduce activation frequency and power consumption while maintaining adequate temperature control.
2Measurement precision
If both compressors are operated frequently to maintain temperature accuracy under increased internal load, then temperature control precision is improved, but compressor lifespan is reduced due to increased activation frequency
Solution Approach 1:
The system dynamically adjusts compressor operation frequency based on detected thermal conditions. Under normal conditions, compressors operate alternately; under increased internal load, the system switches to single-compressor mode. This reduces the cumulative activation frequency and wear on compressor components, thereby extending lifespan while maintaining temperature control through intelligent operation management.
Solution Approach 2:
The patent employs periodic alternating operation of compressors in the first control mode, where compressors are activated in sequence rather than continuously. This periodic action reduces the number of simultaneous activations and allows rest periods, thereby reducing wear and extending compressor lifespan while maintaining temperature control precision.
3Measurement precision
If compressor activation frequency is increased to maintain temperature under increased internal load, then temperature control precision is improved, but relay lifespan is reduced due to increased switching operations
Solution Approach 1:
The control device dynamically switches between operational modes based on thermal conditions. By transitioning to single-compressor operation under increased internal load, the system reduces the frequency of relay switching operations, thereby reducing wear on relay components and extending their lifespan while maintaining adequate temperature control precision through adaptive operation.
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 approach effectively maintains accurate internal temperature control while reducing compressor activation frequency, thereby extending component lifespan and lowering power consumption.
Implementation Method 1
the first evaporator and the second evaporator being disposed to cool the internal portion at the same time
Data Source
AI summary
A refrigerating apparatus includes first and second refrigerant circuits including respective first and second compressors, condensers, pressure reducers, and evaporators, connected circularly with first and second refrigerant pipes, respectively, refrigerants discharged from the first and second compressors being respectively condensed at the first and second condensers and thereafter respectively evaporated at the first and second evaporators to acquire a cooling effect; a temperature sensor that detects a temperature of an internal portion of a cold storage cabinet, the first and second evaporators being disposed to cool the internal portion simultaneously; and a first control device that controls the first and second compressors such that both of them are operated each time a temperature detected by the temperature sensor reaches a first temperature, and the first and second compressors are alternately operated each time a temperature detected by the temperature sensor reaches a second temperature lower than the first temperature.