Abstract: Disclosed are a grinding device and a coffee machine equipped therewith. The grinding device includes: a grinding housing, provided with a discharge port on a side thereof; first and second grinding elements, coaxially disposed in the grinding housing, and forming a grinding gap, wherein the second grinding element rotates relative to the first grinding element to grind raw material in the grinding gap; a pushing wheel for pushing ground raw material from the grinding gap to the discharging port; a drive assembly, connected to the pushing wheel The pushing wheel includes a torque connection portion, the grinding housing is provided with a through hole for it to pass through, the torque connection portion is radially supported on the grinding housing by a fixed support member, a rolling support member is provided between the pushing wheel and the grinding housing and provides at least axial support for the pushing wheel.

Abstract: The present disclosure discloses an asymmetric wavelength multiplexing and demultiplexing chip based on inverse design, which belongs to the technical field of optical components, systems or instrument. The chip includes the first-level asymmetric wavelength multiplexing and demultiplexing unit and the second-level symmetric wavelength multiplexing and demultiplexing unit, which is constructed by silicon based photonics integration technology, includes a substrate, a bottom cladding layer, a core layer and a top cladding layer sequentially stacked from bottom to top. The functional regions inside the first-level unit and the second-level unit are designed based on the inverse design algorithms, and are composed of subunits on the submicron or nanometer scale.

Abstract: A mixing device includes: a box body including a box bottom and an enclosure wall, the box bottom and the enclosure wall forming an accommodating cavity for holding liquid; a sealing strip, detachably joined to the enclosure wall to form a liquid conveying channel along a vertical direction between the enclosure wall and the sealing strip; and a Venturi structure separably disposed on a side of the box body. The liquid conveying channel is formed by joining the sealing strip to the box body, which solves a problem in that a traditional milk pipe is not easily cleaned, and a design without a milk pipe is combined with the complete Venturi structure, which ensures quality of the made milk foam, thereby meeting requirements of people for pursuing delicate mouthfeel and improving taste.

Abstract: A liquid mixing device includes: a cup body provided with an accommodating cavity; a cup holder, the cup body being detachably supported on the cup holder; and a Venturi structure integrally formed with the cup holder and located on a side of the cup body, the Venturi structure including a mixing cavity, a liquid inlet channel connected to the mixing cavity, a steam channel for connecting a steam source and an outlet channel for outputting, the steam channel and the outlet channel being connected to the mixing cavity, the liquid inlet channel being connected to the accommodating cavity through a liquid conveying pipeline, and the liquid inlet channel being connected to the liquid conveying pipeline at an angle. The complete Venturi structure is integrated with the cup holder, so that the number of parts is reduced, thereby making mounting and disassembly more convenient, thus providing great convenience to users.

Abstract: Disclosed are a grinding device and a coffee machine equipped therewith. The grinding device includes: a grinding housing, provided with a discharge port on a side thereof; first and second grinding elements, coaxially disposed in the grinding housing, and forming a grinding gap, wherein the second grinding element rotates relative to the first grinding element to grind raw material in the grinding gap; a pushing wheel for pushing ground raw material from the grinding gap to the discharging port; a drive assembly, connected to the pushing wheel The pushing wheel includes a torque connection portion, the grinding housing is provided with a through hole for it to pass through, the torque connection portion is radially supported on the grinding housing by a fixed support member, a rolling support member is provided between the pushing wheel and the grinding housing and provides at least axial support for the pushing wheel.

Abstract: A disposable highly-protective oral-nasal mask comprises a fixing part. A notch is formed in the portion, corresponding to an oral cavity, of the fixing part. An oral cavity coverage part is arranged at the notch, corresponding to the oral cavity, of the fixing part, and is detachably connected to the fixing part. A first fold part with upward external folds is further arranged on the oral cavity coverage part. A second fold part with downward external folds is arranged on a nasal cavity coverage part. Two easily deformed components are located in accommodating cavities which are formed in the fixing part in one-to-one correspondence with the easily deformed components. Both accommodating cavities are arranged in the length direction of the fixing part. One accommodating cavity is located between the oral cavity coverage part and the nasal cavity coverage part, and the other accommodating cavity is located above the nasal cavity coverage part.

Abstract: Automatism spumescence equipment of milk, including: a main body having a sparkle cavity; two ends of the sparkle cavity respectively have a steam inlet and a steam outlet; an impeller is located inside the sparkle cavity; stress surfaces of the fan blades of the impeller face the steam inlet; a lateral wall of the steam inlet has a milk inlet; the milk inlet connects with a tube which can extract milk from a milk container.