2results about How to "Avoid repeated switching" patented technology

This invention provides a switch state detector, comprising: a magnetic component and a sensing component. The sensing component is used to detect magnetic induction intensity and is configured to: send a first message when the distance parameter between the magnetic component and the sensing component gradually decreases to a first interval ending at a first threshold; and send a second message when the distance parameter between the magnetic component and the sensing component gradually increases to a second interval starting at a second threshold. The first interval and the second interval do not overlap, and the difference between the second threshold and the first threshold is greater than or equal to 1 mm. The switch state detector provided by this invention can prevent the sensing state from repeatedly switching when the distance between the magnetic component and the sensing component reaches a certain critical value.

The invention discloses a non-feed network photovoltaic air conditioning system and a control method thereof.The non-feed network photovoltaic air conditioning system comprises an air conditioning unit, a photovoltaic controller used for supplying power to the air conditioning unit and an alternating current mains supply, and the alternating current mains supply is connected to a direct current bus through a power factor correction circuit; the photovoltaic controller is connected to a direct current bus through a first conversion module, and the first conversion module and the power factor correction circuit can construct bus voltage of the direct current bus. Compared with the prior art, the non-stop operation of the air conditioning unit can be realized under the photovoltaic condition when the alternating current mains supply is powered off, and meanwhile, the smooth transition from the off-grid state to the grid-connected state is realized when the alternating current mains supply is powered on.