43results about How to "Various power supply methods" patented technology

The invention discloses a photovoltaic air-conditioning system and a control method thereof. The photovoltaic air-conditioning system comprises a solar photovoltaic power generation assembly, a converter, an air-conditioning unit, an energy storage assembly and an electric energy comparison assembly, wherein the converter is connected with the solar photovoltaic power generation assembly and an alternating current network, and the electric energy comparison assembly is connected with the converter, the air-conditioning unit and the energy storage assembly and used for determining a power supply of the air-conditioning unit according to output electric energy of the solar photovoltaic power generation assembly, consumed electric energy of the air-conditioning unit, the power supplying stateof the alternating current network and stored electric energy of the energy storage assembly. According to the photovoltaic air-conditioning system and the control method thereof, the problem that the power supply of an air conditioner in the prior art is single is solved, and further the effects that power supplying modes of the air-conditioning unit are enriched, and stable and reliable operation of the air-conditioning unit is ensured are achieved.

The invention belongs to the technical field of refrigeration and cold storage, and particularly discloses a refrigeration and cold storage device for vehicles. The refrigeration and cold storage device comprises an engine, a first power generator connected with the engine, a power conversion device connected with the first power generator, an AC commercial power input device connected with the power conversion device, a compressor connected with the power conversion device, a first heat exchanger, a refrigerator, a temperature sensor, a power conversion device, a control panel, an antenna, a remain meter, a first blower, a second blower and a second power generator, wherein the first heat exchanger and the refrigerator are connected with the compressor; a second heat exchanger is connected with the refrigerator; the temperature sensor, the power conversion device, the control panel and the antenna are connected with a control device respectively; the remain meter is connected with a first battery and a power transformer; the first blower, the second blower and the second power generator are connected with a second battery respectively; the second power generator is connected with a DC / DC converter. The refrigeration and cold storage device has the advantages that various power supply modes are provided, power is supplied to the compressor through the first power generator, a commercial power supply and the first battery to maintain the refrigeration or cold storage function, and the power supply state is stable.

The invention discloses a bolt or nut loosening monitoring device, which comprises a collection module for collecting a loosening signal of a bolt or a nut, a main control module which is connected with the collection module and is used for processing the signal collected by the collection module and judging whether the bolt or the nut is loosened or not according to the collected signal, and a target module which is used for issuing an alarm according to the judgment result of the main control module, and the bolt or nut loosening monitoring device is characterized by also comprising a sensing module which is arranged on a monitored part of the bolt or the nut, wherein the sensing module comprises a deformation sensor (1), the deformation sensor (1) is contacted with the bolt or the nut through an ejector pin (2), and the deformation sensor (1) is connected with the collection module through a signal wire; and when the bolt or the nut is loosened, the bolt or the nut makes the ejector pin (2) move towards the deformation sensor (1), and the loosening deformation quantity of the bolt or the nut is transmitted by the deformation sensor (1) to the collection module through the signal wire. Through the structure by acquiring the deformation signal of the sensor through the ejector pin and the sensor or through the recognition means of the collection module, the purpose for monitoring the loosening of the bolt or the nut is realized.

The invention discloses a communication system which is applicable to the field of unmanned ships. The communication system comprises a base station and an unmanned ship body which are connected by virtue of a cable, and the communication system realizes bidirectional power line carrier communication between the unmanned ship body and the base station by virtue of the cable and reverse power supply of the unmanned ship body to the base station. The communication system disclosed by the invention takes the base station as a signal transfer station and realizes control signal transmission of the unmanned ship body to external equipment, and various types of information acquired by the unmanned ship body is collected and utilized maximally while the control effect of the unmanned ship body is effectively improved.