31results about How to "Avoid repeated start and stop" patented technology

The invention belongs to the technical field of surveying and mapping based on an unmanned aerial vehicle, and discloses an image control point information acquisition method based on the unmanned aerial vehicle and an image control point information acquisition system based on the unmanned aerial vehicle. By the acquisition method disclosed by the invention, information acquisition is performed in a way of not landing the unmanned aerial vehicle, and elevation photography is synchronously achieved; a geographic image is combined with data information to form a visually-viewable three-dimensional geographic model; in such a manner, not only the efficiency of the surveying and mapping based on the unmanned aerial vehicle is improved, but also the quality of the surveying and mapping based on the unmanned aerial vehicle is improved, so that the combination of field working and interior working is closer. The acquisition system provided by the invention performs geographical information surveying and mapping through the unmanned aerial vehicle to generate a three-dimensional geographic surveying and mapping model; the three-dimensional model generated by the acquisition system is intuitive and sensible, and has higher using reference. Therefore, the acquisition method and the acquisition system are suitable for popularization and use.

The invention discloses an air conditioner control method and device. An air conditioner runs in a refrigeration mode. The method comprises the following steps that it is recognized that a compressorin the air conditioner runs according to the lowest running frequency; the target running frequency of the air conditioner at the current moment is obtained; if the target running frequency is lower than the lowest running frequency, the outdoor temperature and the indoor temperature are obtained; the target inlet temperature of an evaporator is obtained according to the outdoor temperature and the indoor temperature; and according to the target inlet temperature of the evaporator, the opening degree of an electronic expansion valve is adjusted. The technical problem that in the prior art, when an air conditioner runs with the lowest frequency, the output refrigerating capacity is larger than the indoor actual required cooling capacity is effectively solved.

The invention discloses a high-speed centrifugal compressor based on gas suspension. The high-speed centrifugal compressor based on gas suspension comprises a shell unit, an impeller unit and a transmission unit, wherein the shell unit is used for protecting an internal structure of a compressor body, the impeller unit comprises an impeller and an impeller housing, the impeller can be driven to rotate by a rotary shaft, a shaft of the transmission unit is fixedly installed on the impeller, and electric current is applied to a stator winding to drive the shaft to rotate. The transmission unit comprises a tilting bush radial bearing and a tilting bush thrust bearing. The tilting bush radial bearing comprises a PZT, a straight beam, a flexible web and a tilting bush. Voltage is applied to thePZT to make the tilting bush generate high-frequency vibration, and gas film is formed between the tilting bush radial bearing and the shaft, and between the tilting bush thrust bearing and the a thrust plate to provide supporting. The compressor body is lubricated by air without supplied oil for lubrication, and the conversion efficiency of equipment is high; the bearings make no direct contactwith the shaft, the service life of a product is long, and repeated starting and stop can be achieved; a system can be kept running at a high speed stably by controlling voltage; and no supply of static pressure external gas is needed, and the compressor can be used in a device which moves at any time.

The invention provides a power battery cooling system, a control method and a vehicle. The system comprises a battery heat dissipation system and an air conditioning system, wherein the battery heat dissipation system includes a battery system, a coolant cooler, a water pump and a battery radiator which are connected in turn by a coolant pipeline, the coolant cooler is provided with a coolant accommodating layer and a refrigerant accommodating layer, the coolant accommodating layer is connected with the coolant pipeline, and the battery heat dissipation system carries out water cooling on a battery system; and an air outlet of the air conditioning system is selectively connected with the battery system so as to carry out air cooling on the battery system when being connected with the battery system, a refrigerant pipeline of the air conditioning system is selectively connected with the refrigerant accommodating layer so as to carry out cooling on a refrigerant in the refrigerant accommodating layer when being connected with the refrigerant accommodating layer. The power battery cooling system provided by the invention can effectively reduce the temperature of a power battery and has the advantage of low energy consumption.

The invention relates to the field of air purification, in particular to a control method applied to an air purification system, a terminal and a storage medium, and can solve the problem that a purification device in the prior art cannot specifically eliminate environmental pollution. The control method comprises the steps that S0, the space where the air purification system is located is divided into a plurality of subspaces, and spatial data of at least one subspace is obtained; and step S1: according to the spatial data, matching a purification device corresponding to the subspace to work. According to the air purification system, the purification devices corresponding to the subspaces can be matched to work according to the obtained space data, such as pollution source data or pollution index data, of the space where the air purification system is located, and the multiple purification devices are used for working in different areas, so that targeted purification can be carried out, and the purification efficiency is greatly improved.

The invention relates to the technical field of household appliances, and discloses a humidifying device. The humidifying device comprises a first moisture absorption channel, a humidifying channel and a second moisture absorption channel which are adjacent in sequence; a fan cavity which is adjacently arranged between the first moisture absorption channel and the second moisture absorption channel and communicates with the first moisture absorption channel and the second moisture absorption channel; a moisture absorption module which is configured to reciprocate among the first humidifying channel, the moisture absorption channel and the second moisture absorption channel, absorb moisture in the moisture absorption channel and release moisture in the humidifying channel; sealing baffle plates which are arranged at two ends of the moisture absorption module and are configured to seal the moisture absorption channel and the fan cavity when the moisture absorption module moves to the position between the moisture absorption channel and the fan cavity; and a fan device which is arranged in the fan cavity and is configured to discharge gas in the fan cavity. In the application, the fan is prevented from being started and stopped repeatedly, so that the service life of the fan is prolonged, and moreover, the use amount of the fan is reduced, the cost is saved, and the energy-saving and environment-friendly effects are realized. The invention further discloses an air conditioner.