Electric control assembly and air conditioner
Solution Overview
Problem
The complex assembly and low reliability of air conditioners due to the need to separate compressor and fan drivers on two electric control boards, leading to increased production costs and maintenance rates.
Innovation Solution
An electric control assembly with a single board featuring two reference grounds, integrating both fan and compressor driving circuits, and a switch isolation driving circuit for signal interaction, which reduces the need for plug connections and improves reliability by isolating interference signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the compressor driver and fan driver are arranged on two separate electric control boards, then signal isolation is achieved, but assembly complexity increases and reliability decreases
Solution Approach 1:
The patent merges the compressor driver and fan driver onto a single electric control board, eliminating the need for separate boards and connectors. This integration reduces assembly complexity while maintaining signal isolation through circuit design, directly resolving the contradiction between reliability and assembly complexity.
Solution Approach 2:
The patent segments the electric control board into distinct functional regions for the compressor driver and fan driver, with isolated ground references and separate signal paths. This segmentation maintains signal isolation benefits while achieving integration, thus improving reliability without increasing assembly complexity.
2Reliability
If two separate electric control boards are used for compressor and fan drivers, then signal isolation is maintained, but the number of connectors and wires increases
Solution Approach 1:
By combining both drivers on one board, the patent eliminates the need for inter-board connectors and wiring, reducing the number of connection points while maintaining signal isolation through circuit-level design, thus resolving the contradiction between signal isolation and connector quantity.
Solution Approach 2:
The patent introduces isolated ground references and switching isolation circuits as intermediaries between the compressor and fan driver circuits, enabling signal isolation without requiring physical separation into two boards, thereby reducing connector requirements while maintaining isolation performance.
3Device complexity
If compressor and fan drivers are integrated on one board, then assembly is simplified, but signal interference may increase
Solution Approach 1:
The patent segments the integrated circuit board into distinct functional zones with separate ground references for the compressor and fan drivers. This spatial segmentation reduces electromagnetic interference while maintaining assembly simplicity, resolving the contradiction between assembly simplicity and signal interference.
Solution Approach 2:
The patent introduces switching isolation circuits and isolated ground references as intermediaries between the compressor and fan driver circuits. These intermediaries block signal interference paths while allowing necessary control signals to pass, thus enabling integration without increasing signal interference.
4Reliability
If separate electric control boards are used, then signal isolation is achieved, but production cost and maintenance rate increase
Solution Approach 1:
The patent combines two separate electric control boards into one integrated board, reducing component count, assembly steps, and production complexity. This merging lowers production costs while maintaining signal isolation through circuit design, resolving the contradiction between signal isolation and production cost.
Data Source
AI summary
An electric control assembly for an air conditioner is provided. The assembly has an electric control board, a fan driving circuit and a compressor driving circuit. A ground end of the fan driving circuit and a ground end of the compressor driving circuit are connected with two reference grounds of the electric control board in one-to-one correspondence. The assembly also has a switch isolation driving circuit, a first input end of which is connected with a control end of the compressor driving circuit. A first output end of the switch isolation driving circuit is connected with a controlled end of the fan driving circuit. A second input end of the switch isolation driving circuit is connected with a control end of the fan driving circuit. A second output end of the switch isolation driving circuit is connected with a feedback end of the compressor driving circuit.