Solar air conditioner, method and device for controlling solar air conditioner
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Solution Overview
Problem
Existing solar air conditioners face inefficiencies due to high costs and inconvenience from short-lived storage batteries and high consumption when powered by utility grids, as they rely on mains supply when solar energy is insufficient.
Innovation Solution
A method and device that detect changes in direct voltage output by the inverter to adjust the compressor's operating frequency, maximizing the use of solar energy by increasing frequency when voltage increases and decreasing it when voltage decreases, allowing the solar air conditioner to operate primarily on solar power without needing mains supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If storage battery is used to power the solar air conditioner when solar energy is insufficient, then the air conditioner can operate continuously, but the device complexity increases and operation becomes inconvenient due to mounting space requirements and regular replacement needs
Solution Approach 1:
The patent removes the storage battery component from the system entirely. Instead of storing solar energy in a battery for later use, the system directly uses real-time solar power to drive the air conditioner, extracting only the necessary function (power supply) without the cumbersome battery infrastructure.
Solution Approach 2:
The system uses solar energy directly to power the air conditioner in real-time without external intervention or storage infrastructure. The solar panels self-generate electricity that immediately powers the compressor and other components, creating a self-sufficient operational system.
2Reliability
If the air conditioner is powered by utility grid when direct voltage is below grid voltage, then continuous operation is ensured, but operational costs and energy consumption increase significantly
Solution Approach 1:
The system dynamically adjusts compressor frequency based on real-time solar voltage levels. When solar voltage is sufficient, the compressor operates at normal or high frequency; when voltage drops, the frequency is reduced to match available solar power, creating a flexible adaptation to varying energy availability.
Solution Approach 2:
The control system continuously monitors direct voltage output from solar panels and uses this feedback to adjust compressor operation. The detected voltage changes trigger frequency adjustments, creating a closed-loop system that optimizes performance based on real-time solar energy availability.
3Productivity
If the compressor operating frequency is increased when direct voltage increases, then cooling efficiency improves, but energy consumption from solar cell may become insufficient
Solution Approach 1:
The compressor frequency is made dynamic rather than fixed. The control system continuously adjusts frequency based on real-time solar voltage measurements, allowing the system to optimize cooling efficiency when solar energy is abundant while reducing consumption when solar energy is limited.
Solution Approach 2:
The system uses feedback from voltage detection to control compressor frequency. When voltage increases indicating sufficient solar energy, frequency increases to improve cooling; when voltage decreases, frequency reduces to prevent energy shortage, creating a self-regulating 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 enhances the use of solar energy, reducing reliance on utility grids and lowering operational costs by dynamically adjusting compressor frequency based on voltage changes, ensuring efficient and cost-effective operation.
Implementation Method 1
powered by a solar cell
Data Source
AI summary
Disclosed is a method for controlling a solar air conditioner, which includes: a detection step, detecting the change situation of a DC voltage outputted by an inverter of the solar air conditioner when it is detected that the solar air conditioner enters an energy-saving control mode; and a judging step, adjusting an operating frequency of a compressor of the solar air conditioner according to the change situation of the DC voltage, so that the solar air conditioner uses a solar cell to supply power. Thus, solar energy can be used to the maximum degree, the problem that there is a need to supply power by a mains power supply because the power supplied for the solar energy is insufficient is avoided, and the cost is saved. Further a device for controlling the solar air conditioner and the solar air conditioner are provided.