64results about How to "Reduce circulation flow" patented technology

A centrifugal blower includes a centrifugal fan having a main plate and a side plate facing each other in a direction of a rotation axis, and a casing to house the centrifugal fan. The casing has a peripheral wall extending along an outer circumferential edge of the centrifugal fan, and has a tongue portion at a position on the peripheral wall. A distance between the outer circumferential edge of the centrifugal fan and the tongue portion is smaller on the main plate side of the centrifugal fan than on the side plate side of the centrifugal fan.

The invention discloses a control method of a combined type air-conditioning system with a natural cooling function. The control method of the combined type air-conditioning system with the natural cooling function is characterized in that the system comprises a compressor module, an air-cooling heat exchange module, a multifunctional liquid storage device, a liquid pump, an air treatment module and control valves, wherein the air-cooling heat exchange module is composed of a heat exchanger assembly and a cooling fan; and the control method comprises the step that the three different work modes including a compression refrigeration work mode, a compression refrigeration and natural cooling coordinated operation combined refrigeration work mode and the natural cooling work mode are achieved by operating the control valves to change the flowing path of refrigeration media. According to the control method of the combined type air-conditioning system with the natural cooling function, fuzzy control is used for adjusting the refrigeration capacity, natural cooling is used for replacing compression refrigeration in low-temperature or transition seasons, natural cold resources are efficiently utilized, the control method is particularly suitable for control over the work environments of data centers, high-performance computers, communication base stations and power electronic equipment, and the energy consumption and operating cost of the air-conditioning system are greatly reduced.

An external-pressure column type hollow fibre membrane assembly able to be flushed by gas features that the dedicated glass flushing part is arranged among membran fibres at bottom, and the height / diameter ratio of column, the length / diameter ratio of membrane fibre, and the filling density of membrane assembly are reasonably set up for normalizing the moving tracing of gas and water and the flowing state of two-phase stream and making the membrane assembly work in subcritical throughput region. Its advantages are high membrane throughput and less pollution to membrane.

The invention relates to destructive distillation and incineration furnace for destructive distillation of oil shale and burning of shale semicoke. In order to realize full-cycle destructive distillation of small-particle oil shale and complete burning of semicoke produced by the oil shale, a collecting port is formed in the inner side of a collecting channel in the wall of a preheating chamber, an exporting port is formed in the outer side, and a supporting arch bridge is arranged at the bottom of the preheating chamber; a gas injection port is formed in the inner side of a gas channel in the wall of a destructive distillation chamber, an importing port is formed in the outer side, and a supporting arch bridge is arranged at the bottom of the destructive distillation chamber; counter-rotating ratchet wheel coke feeders are arranged in a flow guiding chamber, and a flow guiding outlet is formed in the bottom; a discharge port is formed in an incineration chamber, a fine ash hopper communicated with the incineration chamber is arranged on the outer side, primary air nozzle pipes in importing grooves are connected with a primary air channel, and an importing pipe port is formed in the primary air channel; a water-cooled furnace grate is arranged in a cooling chamber, counter-rotating ratchet wheel residue removers are arranged in an ash residue discharge port in the bottom of a discharge chamber, and a secondary air introduction port is formed in the upper part. With the adoption of the furnace, the circulation flow of hot gas is effectively reduced, the calorific value of the gas is increased, the content of nitrogen in the gas is reduced, energy is saved, and consumption is reduced.