7results about How to "Avoid sudden changes" patented technology

The invention discloses a multi-split air conditioning system which comprises an outdoor unit, an air conditioning unit and a control unit. The indoor units are connected to the outdoor units through refrigerant piping and are provided with indoor throttling elements in a matched mode; a control device for controlling the outdoor unit and the plurality of indoor units; in the heating process, the control device receives a shutdown or shutdown instruction, evacuation operation is executed, and refrigerants on the indoor unit side move towards the outdoor unit side; the control unit is configured to execute the following control so that the pressure of the air suction side and the pressure of the exhaust side of the compressor can reach a balanced state: when evacuation operation is executed, the indoor throttling element is controlled to be in a valve opening state, and the outdoor throttling element is controlled to be in a set opening degree; and after the evacuation operation is finished, the indoor throttling element is kept in a valve opening state, the outdoor throttling element is kept in a set opening degree, and then the outdoor throttling element is controlled to work in a valve closing state. The multi-split air conditioning system is ensured to stably operate in the shutdown or shutdown process, and noise is remarkably restrained.

The invention belongs to the technical field of blast furnace ironmaking, and particularly discloses a blast furnace condition graded recovery control system which comprises a data acquisition and monitoring module, a data analysis module, an execution module, a dynamic regulation and control feedback module and an emergency processing module. The blast furnace monitoring system is used for monitoring and collecting blast furnace parameters in real time, judging the blast furnace condition grade, adjusting the blast furnace parameters, monitoring the blast furnace condition state after parameter adjustment and conducting early warning on abnormal working conditions. Aiming at the problems of low recovery efficiency and long recovery period of the current furnace condition, the method realizes rapid identification and efficient recovery of the furnace condition fluctuation by carrying out accurate grading judgment on the furnace condition and matching a differentiated and refined parameter adjustment strategy, and solves the problem that the furnace condition fluctuation is difficult to recover when the furnace condition fluctuation treatment is carried out in the blast furnace smelting process. As parameter adjustment depends on artificial experience, the furnace condition recovery efficiency is low, the period is long, and the stable operation of the blast furnace is influenced.

The utility model relates to the technical field of passenger car air conditioners, and provides a middle passenger car air duct structure which comprises an air conditioner assembly and an air outlet assembly, and the air conditioner assembly comprises a plurality of air supply outlets formed in an air conditioner and a Y-shaped pipeline connected with the air supply outlets; the air outlet assembly comprises two air channels, the air channels are connected with the Y-shaped pipeline and arranged at the top of a passenger compartment of the passenger car, a strip-shaped groove partition is arranged between the two air channels, the cross sections of the two air channels are shrunk downwards, and the break angle is in an arc shape, so that air is conveniently guided to an air outlet in the side away from the strip-shaped groove, and the local resistance coefficient at the turning position is reduced; and meanwhile, the air outlets are formed in the side, away from the strip-shaped groove, of the air duct at equal intervals, so that the air volume and the temperature of all positions in the compartment are more uniform.

The utility model discloses a pirate ship is with anti -dazzle vision guiding device, and the utility model relates to visual guiding technical field. This pirate ship is with anti -dazzle vision guiding device, including the hull, both ends of the hull are provided with guiding mechanism, and the middle part of the side wall of two guiding mechanisms and is away from its opposite side is provided with support assembly, and the opposite side of two guiding mechanisms and is close to both end position is provided with the piano cover, the utility model discloses through guiding mechanism and guides the passenger to fix on the stable area, when the hull reciprocating swing, opens the wick and guides the passenger to fix on, and control assembly controls four drive assemblies to operate, makes four second sliding blocks drive two opposite ends of the piano cover to slide to the middle of the casing, and further can cover the both sides of casing and lampshade, can the light source that the wick emits is shielded to the passenger's field of vision that can temporarily reduce and fix on the wick, reduces the dynamic visual interference of surrounding, prevents the passenger to be dazzled.

The utility model is suitable for the technical field of conveying devices, and provides a screw-type extruder, which comprises a charging barrel, a screw-type extruder, a screw-type extruder, a screw-type extruder and a screw-type extruder, a spiral groove is formed in the outer surface of the screw rod, and the screw rod is inserted into the charging barrel; the discharging assembly is arranged at the feeding end of the charging barrel and used for supplying materials to the charging barrel; each heating assembly comprises a heating ring, a horn mouth and a heat dissipation fan, the periphery of the charging barrel is sleeved with the heating ring, the heating ring is located between the two partition plates, the horn mouth is formed between the two partition plates, an air outlet right faces the heating ring, and the heat dissipation fan supplies air to the horn mouth; the tail end of the driving assembly is connected with the screw rod, and the driving assembly is used for driving the screw rod to rotate. The heating assemblies are arranged between the partition plates at intervals, uniform heating is achieved through the heating rings, and uniform flowing extrusion of molten materials is facilitated.

The utility model relates to the technical field of numerical control lathes, and discloses a precise full-protection numerical control lathe with an inclined lathe bed, which comprises a protective cover, a protective cover, a protective cover and a lathe, the protective cover is slidably mounted on the lathe, a through hole penetrating through the protective cover is formed in the protective cover, an air pump module is fixedly mounted in the through hole, a handle is fixedly mounted on the protective cover, and the protective cover is fixedly provided with an air inlet. A trigger module is arranged on the inner side of the handle, a connecting wire is further fixedly installed on the protective cover, sudden change of internal air pressure at the moment when the protective cover is opened can be avoided through the air pump module by means of air exhaust pressure reduction and air pressure difference balancing, and it is ensured that the air pressure inside and outside the protective cover tends to be balanced when the protective cover is opened; therefore, chippings generated after machining are effectively prevented from flying out, the working safety is improved, when the protective cover is opened, external air can rapidly flow inwards, the temperature in the protective cover can be effectively reduced, normal operation of a machine tool can be protected, and the service life of equipment can be prolonged.

The utility model discloses an adjustable high-strength counterweight guide rail bracket, which comprises an upper bracket and a lower bracket, and is characterized in that the upper bracket is of a cross section modulus gradient structure and comprises two surfaces which are perpendicular to each other, a hole matched with a guide rail is formed in the vertical surface, the horizontal surface of the vertical surface is of a trapezoidal structure, and the width of the large bottom edge of the trapezoidal structure is equal to that of the lower bracket; the near-trapezoid large bottom edge part of the horizontal plane is matched and connected with the lower bracket through a bolt; the lower support is also provided with two perpendicular faces, and inner folding rib edges are arranged on the two sides of the width of the lower support. A recognizable and effective installation space is provided, local high stress concentration of the upper support is avoided, and the service life of parts is prolonged; the structural strength of the support is greatly improved on the basis of the same thickness, the thickness of plates can be reduced, the weight of accessories is reduced, and cost is saved; parts can be adjusted under various complex working conditions on site, and the installation precision of the elevator body is guaranteed.