Air Conditioner Standby Circuit With Segmented Power Switching
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Solution Overview
Problem
Current air conditioner controllers consume excessive power even in standby mode, leading to energy wastage and potential safety hazards due to continuous power supply to various components.
Innovation Solution
A low-power consumption standby circuit device with a two-mode switching power supply system, utilizing MCUs to control separate power switches for the indoor and outdoor units, allowing for selective power disconnection and reducing power consumption to quasi zero-watts by using a secondary power supply only for essential components during standby.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a one-mode power supply is used to power all components including swing motor, display panel, and mainboard during standby, then all components remain functional and ready for operation, but power consumption exceeds 3 watts causing energy waste and safety hazards
Solution Approach 1:
The power supply system is segmented into two independent modes: primary power supply for essential components (MCU, signal receiving circuit) and secondary power supply for non-essential components (swing motor, display panel, mainboard). This segmentation allows selective powering of components based on operational needs, enabling the system to maintain reliability for essential functions while eliminating unnecessary power consumption during standby.
Solution Approach 2:
The power supply configuration is made dynamic through control switches that can transition between different power modes. The first control switch connects/disconnects the primary power supply, and the second control switch connects/disconnects the secondary power supply. This dynamic switching capability allows the system to adapt its power consumption level based on operational state (standby vs. operation) while maintaining the ability to quickly restore full functionality when needed.
2Ease of operation
If continuous power is supplied to swing motor, display panel, and mainboard during standby, then these components remain operational, but this increases potential safety hazards and energy waste
Solution Approach 1:
Non-essential components (swing motor, display panel, mainboard) are extracted from the continuous power supply during standby mode through the second control switch. These components are completely disconnected from the secondary power supply, eliminating any safety hazards associated with continuous power presence while maintaining their availability for rapid activation when operation is required.
Solution Approach 2:
Control switches serve as intermediaries between the power supply system and various components. The first control switch mediates power delivery to essential components, ensuring they remain powered during standby. The second control switch mediates power delivery to non-essential components, disconnecting them during standby to eliminate safety hazards. This intermediary control mechanism enables precise power management that balances safety with operational readiness.
Data Source
AI summary
Disclosed is a low-power consumption standby circuit device comprising a primary power supply, a secondary power supply, a first control switch and a control circuit module. An input terminal of the primary power supply is connected with an external power supply via the first control switch. An output terminal is connected with external loads to power the external loads. An input terminal of the secondary power supply is connected to the external power supply and an output terminal is electrically connected with the control circuit module. The control circuit module comprises an MCU module and a signal receiving circuit, wherein the MCU module controls the on-off of the first control switch. An air conditioner adopting the circuit device achieves a quasi zero-watt standby target through a reasonable power supply distribution and enhancing the anti-interference capability of a main chip. A control method for the air conditioner is also disclosed.