Low-power consumption standby circuit device, air conditioner and control method for air conditioner
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Solution Overview
Problem
Current air conditioner controllers consume excessive power during standby mode, leading to energy wastage and potential safety hazards, as they maintain power to various components even when not in use.
Innovation Solution
A low-power consumption standby circuit device utilizing a dual-mode switching power supply, where the primary power supply is disconnected during standby, and only the secondary power supply powers the control circuit module and display panel, with two MCUs controlling separate loads to reduce overall power consumption and communication interfaces.
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 main chip during standby mode, then the controller can maintain full functionality and responsiveness, but the power consumption increases to over 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 full operation and secondary power supply for standby mode. The secondary power supply only powers essential components (MCU module and display panel), while the primary power supply powers all other components including swing motor and main board. This segmentation enables the controller to maintain basic functionality during standby with minimal power consumption.
Solution Approach 2:
The system dynamically switches between primary and secondary power supply modes based on operational state. During standby, the controller automatically transitions to secondary power supply mode to reduce consumption. When operation is required, it switches back to primary power supply mode. This dynamic adaptation allows the system to optimize power consumption while maintaining reliability.
2Reliability
If two MCU modules are used with separate power supplies, then the anti-interference capability and control reliability are improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The control system is divided into two independent MCU modules, each with its own power supply circuit. The first MCU module controls the primary power supply and main board, while the second MCU module controls the secondary power supply and display panel. This segmentation provides electrical isolation that enhances anti-interference capability, as faults in one module cannot affect the other.
Solution Approach 2:
The two power supply circuits act as intermediaries that electrically isolate the two MCU modules. By providing separate power paths, the system prevents electrical interference and noise from propagating between modules, thereby improving reliability without requiring complex shielding or filtering circuits.
Data Source
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AI summary
Disclosed is a low-power consumption standby circuit device, comprising a primary power supply (13), a secondary power supply (11), a first control switch (12) and a control circuit module, wherein an input terminal of the primary power supply (13) is electrically connected with an external power supply via the first control switch (12), and an output terminal thereof is electrically connected with external loads to power the external loads; an input terminal of the secondary power supply (11) is directly and electrically connected to the external power supply, and an output terminal thereof is electrically connected with the control circuit module; and 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. Further disclosed are an air conditioner adopting the above-mentioned low-power consumption standby circuit device, and a control method for the air conditioner. The air conditioner achieves a quasi zero-watt standby target through a reasonable power supply distribution, thereby reducing the power consumption in a standby state and also enhancing the anti-interference capability of a main chip.