Abstract: The present disclosure relates to an air conditioner pipeline device and an air conditioner. The air conditioner pipeline device includes a gaseous refrigerant connecting pipe and a liquid refrigerant connecting pipe which are configured to be connected between an indoor unit and an outdoor unit of the air conditioner. At least one of the gaseous refrigerant connecting pipe and the liquid refrigerant connecting pipe adopts a multi-layer pipe. The multi-layer pipe includes at least two conductive pipes, sequentially and coaxially sleeved along a radial direction of the multi-layer pipe and configured to be connected to a power supply of the air conditioner to transmit power to the air conditioner, where an internal area of the innermost layer of conductive pipe is used for a refrigerant to flow; and first insulating layers, configured to achieve insulation of at least two conductive pipes.

Abstract: The present disclosure provides a power supply circuit without a charging loop, and a power management system. The power supply circuit comprises an alternating current switch component, a photovoltaic switching component and a direct-current bus capacitor. The alternating current switch component is configured to electrically connect a live wire of a three-phase alternating current to a direct-current bus, and cause, when an alternating current is selected to charge the direct-current bus capacitor, a voltage across two ends of a direct-current bus capacitor to steadily rise to a target voltage. The photovoltaic switching component is configured to electrically connect a photovoltaic power supply to the direct-current bus, and cause, when the photovoltaic power supply is selected to charge the direct-current bus capacitor, the voltage across the two ends of the direct-current bus capacitor to steadily rise to the target voltage.

Abstract: The present disclosure provides a parameter configuration device, including a first signal modulator, a second signal modulator and an operating member electrically connected with the first signal modulator or the second signal modulator. The first signal modulator and the second signal modulator have a connection state and a separated state. In the connection state, the first signal modulating element is electrically connected with the second signal modulating element, and the first signal modulating element and the second signal modulating element enclose a configuration space for a cable to pass through In the separated state, the first signal modulator is separated from the second signal modulator.