6results about How to "Reduce initial resistance" patented technology

A reciprocating razor net beneficial to hair entry, comprising a net body, wherein a plurality of curved hair entry grooves are arranged on the net body, the hair entry grooves are open on both sides, the width of the first end of the hair entry grooves gradually decreases from outside to inside, and the width of the second end of the hair entry grooves gradually expands and then gradually decreases from outside to inside. The utility model realizes the function of combing and guiding hair, improves shaving efficiency, reduces shaving friction, improves the fitting degree of the net and the shaving comfort.

The utility model relates to the technical field of filters, in particular to a folding activated carbon filter which comprises a metal outer frame mounted on a main body, L-shaped reinforcing blocks mounted at the corners of the periphery between the metal outer frame and the main body, a metal net mounted between the metal outer frame and the main body, and a connecting frame mounted in the main body, an activated carbon filter layer is mounted on the connecting frame. The activated carbon filter layer arranged in the device has the characteristic of large adsorption capacity, has excellent adsorption capacity on microorganisms and bacteria and particularly excellent adsorption capacity on low-concentration adsorbate, and the activated carbon fiber felt is easy to regenerate and high in desorption speed, so that the activated carbon filter layer is fully utilized, and the service life of the activated carbon filter layer is prolonged. The metal outer frame arranged on the main body of the activated carbon filter is firm and detachable, filter materials are convenient to replace, the purpose of reutilization is achieved, the activated carbon filter layer is of a folding type, the filter area of the filter is increased, the initial resistance is reduced, the ventilation quantity is increased, and then efficient filtering is guaranteed.

This utility model relates to the field of tapping guides, and discloses a tapered guide head for preventing jamming of thread tapping guides. It includes a main body, a tapered head fixedly connected to the bottom of the main body, a spiral drilling edge on the surface of the tapered head, a handle fixedly connected to the top of the main body, an oil inlet at the top of the handle, a reservoir inside the tapered head, an oil passage inside the main body, the reservoir communicating with the oil inlet via the oil passage, and multiple channels inside the tapered head arranged in a ring at equal angular intervals. In this utility model, lubricant is delivered to the outlet through the oil inlet, reservoir, oil passage, and channels, forming a continuous lubricating film. When the tapping machine rotates the tapered head and rubs against the workpiece, it reduces frictional resistance, minimizes heat accumulation, and prevents the tap from overheating and deforming.

The invention relates to the technical field of ventilation systems, in particular to a ventilation system energy-saving transformation method based on filtration, which comprises the following steps: S1, in a brand new state of an original filter, measuring a section wind speed V1, filter efficiency e1 and filter pressure loss p1 at the wind speed, and measuring corresponding energy consumption n at running time T; s2, replacing the high-efficiency low-resistance filter, adjusting the wind speed of the operation section of the system to V1, measuring the efficiency E1 and the filtering pressure loss P1 of the filter at the wind speed, and measuring the corresponding energy consumption N of the operation time T; and S3, implementing energy efficiency evaluation. In the early stage of replacing the high-efficiency low-resistance filter, the initial resistance is lower, the needed fan work is reduced, under the condition of the same ventilation quantity, the fan work is reduced, the energy consumption is lower, in the middle and later stages of replacing the high-efficiency low-resistance filter, the final resistance is lower than that of an original filter, the average resistance is lower, and the needed fan work is reduced in the whole life cycle stage. Therefore, energy conservation is realized.

Disclosed is an additive for a nonaqueous electrolyte solution, containing a first compound represented by Formula (1) and a second compound which is a carbonate compound, a cyclic sulfone compound, and / or a cyclic disulfonic acid ester compound. [In Formula (1), Q represents an alkenylene group having 4 to 8 carbon atoms, which forms a cyclic group together with a sulfur atom of a sulfonyl group, X represents a sulfonyl group, a carbonyl group, or a phosphoryl group, R1 represents an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an alkynyl group having 2 to 6 carbon atoms, an aryl group, an alkoxy group having 1 to 4 carbon atoms, an alkenyloxy group having 2 to 6 carbon atoms, an alkynyloxy group having 2 to 6 carbon atoms, or an aryloxy group, and n represents 1 or 2.]