37results about How to "Avoid high load operation" patented technology

The invention discloses multi-cable active unwinding type laying equipment, which comprises a plurality of unwinding mechanisms which are uniformly mounted on the end surface of one end of a mounting seat along the circumferential direction of the mounting seat, cable rolls are mounted on the unwinding mechanisms, a shaft rod perpendicular to the end surface of the mounting seat is constructed at the center of one end, far away from the unwinding mechanisms, of the mounting seat, and the cable rolls are mounted on the shaft rod. A cable guiding mechanism is installed on the end face, on the same side as the unwinding mechanism, of the installation base. According to the invention, active unwinding of a plurality of cable coils is realized at the same time, cable laying is stably and efficiently carried out in cooperation with traction of constructors or traction equipment, the labor intensity of the constructors is reduced, corresponding problems caused by high-load operation of the traction equipment are avoided, and the cable laying device can be used for laying cables according to requirements of different scenes. The cables are laid side by side or wound, so that the scene is kept clean and tidy, and the laying difficulty is reduced. The cable laying device is suitable for the technical field of cable laying in power construction.

The present invention proposes a self-air curtain system for reducing air intrusion in a tunnel with a dome and a square bottom, which consists of a curved air duct with a specific curved form, mainly including an air guide plate, an arc surface at the top of the main body of the air duct, and an arc surface at the bottom of the main body of the air duct 1. Outlet air plate, each arc surface that constitutes the air duct has a specific curved form, through these specific arc air ducts, the air duct can change the direction of the air entering from the air guide plate with low resistance, forming a tunnel A directional air curtain with the opposite wind direction but with a certain angle of inclination. The system of the invention has simple structure, extremely high reliability, does not require external energy input, avoids high-load operation of the tunnel thermal insulation system, and reduces the probability of accidental danger.

The invention discloses a control method for an air purifier as well as the air purifier. The air purifier is preset with a plurality of operation modes, each operation mode corresponds to a group of control parameters, and the value of at least one control parameter between any two operation modes is different. The control method comprises the following steps of: S00, starting up for operation; S10, controlling the air purifier to operate under the first mode once, and alternatively operating two operation modes different from the first mode, wherein purifying capacity under the first mode is between purifying capacity under two operation modes which alternately operate. According to the control method for the air purifier disclosed by the invention, the air purifier is used for reducing concentration of indoor particulate matters to a proper range at an initial operation stage, and then alternatively operates among different operation modes, so that the air purifier is prevented from operating for a long time under high load to protect core parts and save energy resources; and meanwhile, concentration of the indoor particulate matters also can be kept at relatively low level.