Control Power Source Board with Segmented Units to Exceed Load Limits
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Solution Overview
Problem
Existing control power source apparatuses for electric equipment, such as air conditioners, require large and complex electric component boxes made of incombustible materials due to high power consumption and complex designs, leading to increased costs and size constraints.
Innovation Solution
A control power source apparatus with a power source board containing a first and second power source unit, each with current limiting circuits, supplies power to independent load circuits outside the electric component box, allowing total load power to exceed predetermined values without individually exceeding them, thus avoiding the need for incombustible material encasement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the control board is designed to consume electric power not exceeding a predetermined value and accommodate only the power source board in the electric component box, then the electric component box size and complexity are reduced, but the total load power capability is limited
Solution Approach 1:
The power source board is divided into multiple independent power source units (first power source unit, second power source unit, etc.), each capable of supplying power up to a predetermined value. These units are arranged in parallel to collectively provide higher total power capability while each unit individually meets the power limitation requirement for the electric component box.
2Power
If multiple power source units are provided on the power source board to supply power to independent load circuits outside the electric component box, then the total load power capability exceeds the predetermined value, but the risk of ignition and need for incombustible material encasement increases
Solution Approach 1:
The load circuits are extracted from the electric component box and placed outside it. The power source units remain inside the electric component box but supply power to these external load circuits. This separation allows the total power capability to exceed the predetermined value while the electric component box itself maintains its incombustible material construction and size constraints, as only the power source units (not the full load circuits) are housed within it.
Data Source
AI summary
A control power source apparatus 100 includes: a power source board 2 accommodated in an electric component box 1 made of an incombustible material; a first power source unit PS1 provided at the power source board 2 and configured to supply electric power having an upper limit of a predetermined value; a second power source unit PS2 provided at the power source board 2 and configured to supply electric power having an upper limit of a predetermined value; a first load circuit L1 provided outside the electric component box 1 and configured to be supplied with electric power from the first power source unit PS1; and a second load circuit L2 provided outside the electric component box 1 so as to be electrically independent from the first load circuit L1, and configured to be supplied with electric power from the second power source unit PS2.