7results about How to "Reduce airflow" patented technology

The utility model relates to the technical field of pipeline fittings, and discloses an anti-cavitation pressure reducing valve, which comprises a valve body, a valve rod, an O-shaped ring, a sealing ring, a valve disc, a spring, a diaphragm, a valve cover and an exhaust valve, and is characterized in that a valve seat is arranged on the valve body, the valve rod is arranged in the valve seat, the sealing ring is arranged on the valve seat, and the valve disc is arranged on the sealing ring. According to the anti-cavitation pressure reducing valve, the anti-cavitation pressure reducing valve comprises a valve body, a valve rod, an O-shaped ring, a sealing ring, a valve disc, a spring, a diaphragm, a valve cover and an exhaust valve, a valve seat is arranged on the valve body, meanwhile, a valve clack of the valve seat is designed in a cage winding mode, the cage winding type valve clack can reduce the corresponding flow speed of fluid in the using process, and therefore the valve body is protected against cavitation. The air flow caused by the reduction of the flow speed is reduced at the same time, cavitation can be well avoided, the service life of the valve body, the valve seat and the valve rod is greatly prolonged, manual exhaust operation can be carried out on the upper side of the valve cover, and the noise and vibration phenomena in the using process are reduced.

This utility model relates to the field of wheat processing technology and discloses a high-efficiency wheat washing and screening device, including a casing. An impurity discharge hole is provided on one side of the casing. A third fixing plate is fixedly connected to the upper outer side of the casing. A screening mechanism is provided on the top of the third fixing plate. An air duct box is provided on the side of the casing away from the impurity discharge hole. A first optical axis is provided inside the air duct box. An isolation plate is rotatably connected to the outer wall of the first optical axis. A second optical axis is rotatably connected to the side of the isolation plate away from the air duct box. An adjusting strip is rotatably connected to the outer wall of the second optical axis. In this utility model, airflow is generated by a blower mechanism and transported into the casing through the air duct box. The adjusting strip allows for upward adjustment, thus solving the problems of poor purification effect and increased raw material loss in traditional wheat washing and screening devices.

The utility model belongs to the technical field of alarm device, disclose a kind of early warning device, the early warning device includes export piece and early warning mechanism, export piece inner wall is fixedly connected with fan, early warning mechanism includes early warning prompt subassembly and early warning trigger subassembly, early warning prompt subassembly includes heat pipe and connector, heat pipe is installed in export piece far from the one end of fan, connector is set on heat pipe, connector inside is equipped with plugging block, plugging block has solidification state and melting state, plugging block is in solidification state, plugging block can block connector to make connector and heat pipe disconnect;Plugging block is in melting state, plugging block can be separated from connector to make connector and heat pipe communicate;Early warning trigger subassembly can selectively communicate or disconnect with heat pipe, early warning trigger subassembly disconnects with heat pipe, and early warning trigger subassembly can send early warning signal.The early warning device provided by the utility model can effectively identify fire risk and improve early warning effect.

The application discloses a Dendrobium candidum multi-index nondestructive quality evaluation method, and belongs to the technical field of traditional Chinese medicinal material nondestructive detection, and particularly relates to a Dendrobium candidum multi-index nondestructive quality evaluation method. The sample is clamped in a measuring cavity, an effective measuring area between nodes is determined, and zero-perturbation pre-scanning data are obtained, based on which a micro-perturbation script is generated, near-infrared pulse irradiation, air heat exchange perturbation and mechanical light tapping perturbation are applied under a unified time axis, diffuse reflection near-infrared spectrum, a thermal recovery curve, a vibration attenuation waveform and an epidermal texture change sequence are synchronously collected, a moisture-polymer coupling state tensor is constructed, and a quality evaluation result or an abnormal label is output.

The invention discloses a ceramsite concrete block pouring device, which relates to the technical field of building material production, and comprises a base and a pouring mechanism, the upper end of the base is symmetrically and fixedly connected with two electric sliding rails, and the side walls of the two electric sliding rails are jointly and slidably connected with a portal frame. The pouring mechanism comprises a distribution pipe fixedly connected to the upper end of the portal frame, the lower end of the distribution pipe penetrates through the top in the portal frame and is fixedly connected with a pouring head, a plurality of pouring openings are formed in the bottom in the pouring head, the inner wall of each pouring opening is rotationally connected with a valve plate through a pin shaft, and the other end of each valve plate is rotationally connected with a flow guide plate through a pin shaft. The lower end of the pouring head is fixedly connected with multiple vertical frames. According to the invention, by dispersing multi-strand instantaneous material distribution, a traditional centralized accumulation material distribution mode is changed, so that the aggregate distribution in the formed building block is extremely uniform and has no density gradient, and the consistency of mechanical properties and the stability of thermal insulation performance of a product are improved.

This utility model provides an indoor unit for an air conditioner with dual-sided air outlets, including a housing with a first air outlet and a second air outlet. A main air duct section is disposed within the housing, along with a first air duct section and a second air duct section connecting to it. The first air duct section is connected to the first air outlet, and the second air duct section is connected to the second air outlet. The main air duct section includes a first air duct wall and a second air duct wall. A cross-section at the front end of the first air duct wall is a first reference surface, and a cross-section at the front end of the second air duct wall is a second reference surface. The plane of symmetry between the first and second reference surfaces is a third reference surface. The first air duct section includes a fourth air duct wall. The second air duct section includes a sixth air duct wall. A reference line is provided at the connection between the sixth air duct wall and the fourth air duct wall, and the cross-section at the reference line is perpendicular to the third reference surface. This design helps to improve the uneven airflow between the first and second air outlets.

This application discloses a packaging structure and an electronic device. The packaging structure includes a substrate and a MEMS chip. The substrate has opposing first and second surfaces, with first and second acoustic holes respectively disposed on the first and second surfaces. An airflow channel connecting the first and second acoustic holes is disposed inside the substrate. The projection of the airflow channel onto the first surface extends beyond the outer edge of the first acoustic hole, and / or the projection of the airflow channel onto the second surface extends beyond the outer edge of the second acoustic hole. The MEMS chip is disposed on the first surface of the substrate, and the diaphragm of the MEMS chip is opposite to the first acoustic hole.