baber/WOPTO huggingface dataset:
Patent WO-2021046841-A1 (WO)
Title: High support formwork vibration detection and early warning system
Inventor: DING YOULIANG
IPC: G01D21/02
Filed: 2019-09-14
Abstract: Provided in the present invention is a high support formwork vibration detection and early warning system, comprising a set of sensors, a cloud computing system, and an early warning system. The sensors send monitoring signals to the cloud computing system; the cloud computing system establishes a three-dimensional space finite element model for a building structure to be installed with seismic supports and hangers according to the physical structural dimensions thereof, and divides same into a plurality of monitoring regions; and the early warning system receives early warning signals from the cloud computing system and issues early warnings. The present invention has the characteristics of a strong system, high efficiency and accuracy, and high intelligence, may effectively monitor the vibration of high support formworks and whether the internal structure of the system is deformed, and avoids the shortcomings in which traditional monitoring algorithms may only observe external deformations and cannot take emergency measures.
Patent WO-2020057642-A1 (WO)
Inventor: CHEN YIJIAN
IPC: H04W72/04
Filed: 2019-09-20
Abstract: Provided are a configuration signaling execution control method and apparatus, and a device, a system and a storage medium. The method comprises:
in a beam recovery process, when configuration signaling is received, determining an execution environment for the configuration signaling, and determining an execution policy for the configuration signaling according to a determination result.
Patent WO-2020063640-A1 (WO)
Inventor: AL-IMARI MOHAMMED S ALEABE
IPC: H04W72/04
Filed: 2019-09-25
Abstract: Various solutions for handling multiple active configurations of configured grant with respect to user equipment and network apparatus in mobile communications are described. An apparatus may determine whether multiple active configurations of a configured grant corresponding to a bandwidth part of a serving cell are configured. The apparatus may apply arestriction on an initial transmission of a transport block (TB) in an event that themultiple active configurations of the configured grant are configured. The apparatus may perform the initial transmission of the TB according to the restriction.
Patent WO-2020177310-A1 (WO)
Title: 光学成像镜头
Inventor: WANG XINQUAN
IPC: G02B9/60
Filed: 2019-09-27
Abstract: 一种光学成像镜头，其沿着光轴由物侧至像侧依序包括：具有光焦度的第一透镜（E1）、第二透镜(E2)、第三透镜(E3)、第四透镜(E4)和第五透镜(E5)。第一透镜具有正光焦度，物侧面为凸面；第二透镜具有负光焦度；第一透镜的物侧面至光学成像镜头的成像面在光轴上的距离TTL与光学成像镜头的总有效焦距f满足TTL/f＜0.9；以及第三透镜的阿贝数V3与第四透镜的阿贝数V4满足0＜V3-V4＜10。
Patent WO-2020134348-A1 (WO)
Inventor: LIU ZENAN
IPC: H01P1/203
Filed: 2019-10-11
Abstract: 本发明提供一种LTCC滤波器，包括壳体和滤波组件；所述壳体包括顶侧和底侧；所述滤波组件包括第一层、分别叠设于第一层相对两侧的两个第二层以及分别叠设于两个第二层的远离第一层一侧的两个第三层：第一层包括靠近顶侧的第一层顶端和靠近底侧的第一层底端，第一层顶端接地连接，第一层底端形成开路状态，第一层用于充当电感L；第二层包括靠近顶侧的第二层顶端和靠近底侧的第二层底端，第二层顶端形成开路状态，第二层底端接地连接，第二层用于充当接地电容C；且第二层与第一层形成耦合共同构成LC谐振单元；第三层接地连接，用于充当LTCC滤波器的屏蔽层。与相关技术相比，本发明LTCC滤波器结构简单、体积小且频段覆盖范围广。
Patent WO-2020140568-A1 (WO)
Inventor: DUAN LIAN
IPC: H04R17/02
Filed: 2019-10-25
Abstract: 本发明提供了一种压电式麦克风，包括具有背腔的基底及固定于所述基底上的压电悬臂梁振膜，所述压电悬臂梁振膜由多个膜瓣组成，每一所述膜瓣一端与所述基底固定，另一端悬置于所述背腔上方，每相邻两所述膜瓣之间间隔设置形成间隙，所述压电式麦克风还包括连接两相邻所述膜瓣的弹性伸缩件，至少在一组两相邻所述膜瓣之间设置有所述弹性伸缩件。与相关技术相比，本发明提供的压电式麦克风的性能更佳。
Patent WO-2020093970-A1 (WO)
Inventor: SHENG XIAOCHU
IPC: G05D1/02
Filed: 2019-11-04
Abstract: An automated lawnmower and a control method therefor. The automated lawnmower (100) is provided thereon with an inertial navigation component (110) and a control module (120). The inertial navigation component (110) is used for detecting angular velocity spatial vector information and acceleration spatial vector information of every moment after the automated lawnmower (100) departs a charging station (200). The control module (120) is used for calculating, on the basis of the information, relative position information and relative angle information between the automated lawnmower (100) and the charging station (200) and planning a travel route for the automated lawnmower (100). The automated lawnmower and the control method therefor allow the relative position and relative angle of self to be learned accurately after departing the charging station and, specifically when returning to the charging station is required, obviate the need to rely on an electrically-conductive lead of a work boundary in planning the travel route, thus saving resources and broadening the applications of the automated lawnmower at the same time.
Patent WO-2020232999-A1 (WO)
Title: Information security-based positioning data monitoring method and related device
Inventor: CHEN XIANG
IPC: H04W64/00
Filed: 2019-11-12
Abstract: The present application relates to the technical field of information security, and in particular, to an information security-based positioning data monitoring method and a related device. The method comprises: application software obtains a unique identifier and terminal geographic location coordinate information, and uploads the terminal geographic location coordinate information, the unique identifier, and user information to a backend server; the back-end server obtains reference geographic location coordinate information by means of the unique identifier, calculates a distance difference between the reference geographic location coordinate information and the terminal geographic location coordinate information, determines whether the distance difference exceeds a preset error threshold, if so, determines that a fraudulent practice exists, and records the user information and positioning data fake information in a credibility evaluation table. In the present application, by obtaining the unique identifier of a positioning device, determining approximate coordinates of a user terminal, and comparing the coordinates with coordinate information identified by a terminal system, the fraudulent practice of the user terminal is effectively monitored, and reliable credibility evaluation data is provided for subsequent financial services.
Patent WO-2021097776-A1 (WO)
Inventor: XIA ZEYU
IPC: G06K9/00
Filed: 2019-11-21
Abstract: A Gabor feature-based face detection method, comprising: acquiring a color face image (S101); graying the color face image to obtain a grayed face image (S102); processing the grayed face image by using a Gabor filter, and then obtaining a Gabor feature image (S103); performing dimension reduction on the Gabor feature image by using a principal component analysis method, so as to obtain low-dimensional image data (S104); and performing determination and category recognition on the low-dimensional image data and low-dimensional sample image data by using a nearest-neighbor recognition method, and selecting therefrom an image having the minimum distance as a face detection result (S105). Said method has an accurate detection result.
Patent WO-2021114019-A1 (WO)
Inventor: JIANG GE
IPC: H01Q19/12
Filed: 2019-12-09
Abstract: Provided are an antenna system (100) and an electronic device, the antenna system (100) comprising a metal base (10), a circuit board (20), and a horn unit (30); the circuit board (20) is sandwiched between the metal base (10) and the horn unit (30) and is electrically connected to each of the metal base (10) and the horn unit (30); the metal base (10) comprises a top surface (11) and a bottom surface (12) opposite to the top surface (11), the circuit board (20) being coveringly arranged on the top surface (11); a feed transmission line (21) is arranged on the circuit board (20); the horn unit (30) comprises four side walls (31) connected end to end, the inner surfaces (311) of the four side walls (31) enclosing and forming a through-hole (32), the inner side of each side wall (31) being provided with a ridge part (312) extending from the side wall (31), each of the four ridge parts (312) being press-fitted on the circuit board (20) at positions corresponding to the feed transmission line (21); the horn unit (30) further comprises a first filling part (33) filled in the through-hole (32), the first filling part (33) being provided with a groove (331) corresponding to the ridge part (312), the ridge part (312) fitting with the groove (331) to close the through-hole (32). By means of filling the first filling part (33) in the horn unit (30), the frequency and size of the antenna system (100) are reduced, satisfying the requirements of large-angle scanning.
Patent WO-2021062942-A1 (WO)
Title: Circuit board having dampproof structure
Inventor: YE ZHIHANG
IPC: H05K1/02
Filed: 2019-12-10
Abstract: A circuit board having a dampproof structure, relating to the technical field of circuit boards. The circuit board having a dampproof structure comprises an L-shaped fixing frame (1); a circuit board (2) is fixedly provided on the inner side of the L-shaped fixing frame (1); an upper waterproof dampproof layer (3) and an anti-condensation layer (4) are sequentially and fixedly provided on one side of the circuit board (2); a fireproof flame-retardant layer (5), an upper insulating layer (6), an electric heating sheet (7), a lower insulating layer (8), a lower waterproof dampproof layer (9), and a mildewproof layer (10) are sequentially and fixedly provided on the other side of the circuit board (2); a pressing frame (11) is fixedly provided on one side of the L-shaped fixing frame (1); and one side of the pressing frame (11) is fixedly connected to on side of the anti-condensation layer (4). By providing the upper waterproof dampproof layer (3), the lower waterproof dampproof layer (9), the anti-condensation layer (4), the electric heating sheet (7), a dampproof sealing ring (14), a triangular sealing strip A (12), and a triangular sealing strip B (13), the circuit board has a strong dampproof function, has heating and anti-condensation functions, has high safety performance, and is suitable for popularization.
Patent WO-2020220683-A1 (WO)
Inventor: ZHENG ZIYONG
IPC: H04L1/00
Filed: 2019-12-11
Abstract: 本申请涉及一种报文处理方法、装置、计算机设备和存储介质，发送端先获取待发送的初始IP报文数量，并根据该待发送的初始IP报文数量，对初始IP报文进行交织处理，得到交织矩阵，然后将该交织矩阵中的IP报文发送至接收端。该方法中，由于发送端对初始IP报文进行了交织处理，即将初始IP报文离散地分散在不同的原有时序中，达到简单有效地将初始IP报文原本的序号离散化，这样，在发生突发丢包时，集中丢弃的报文也将随之离散分布于原有的报文序号链条中，提高了网络的吞吐量，从而提升了网络数据的传输效率。
Patent WO-2021119966-A1 (WO)
Title: 一种治疗消化系统真菌病的药品
Inventor: XIAO MINGCHUN
IPC: A61P31/10
Filed: 2019-12-17
Abstract: 《二陈汤》和《平胃散》的原料药加减在制备治疗消化系统真菌病的药品或保健品中的新应用，具体涉及原料药半夏、橘皮、苍术、厚朴、甘草等植物中含有的生物碱和挥发油在制备治疗消化系统真菌病的药物或保健品中的新用途。
Patent WO-2020125659-A1 (WO)
Inventor: LI PENG
IPC: A61P27/00
Filed: 2019-12-18
Abstract: Provided is an aldehyde binder, specifically, disclosed is a compound as represented by formula (II) or a pharmaceutically acceptable salt.
Patent WO-2020125691-A1 (WO)
Title: Signal processing method, apparatus, device, and computer storage medium
Inventor: YE XIAOPING
IPC: H04L7/02
Filed: 2019-12-18
Abstract: Disclosed are a signal processing method, apparatus, device, and computer storage medium, said method comprising: obtaining clock recovery input data; performing frequency-domain clock recovery on the clock recovery input data to obtain clock recovery output data; according to said clock recovery output data, performing frequency-domain blind equalization to obtain frequency domain balance data.
Patent WO-2021051690-A1 (WO)
Inventor: YANG JIE
IPC: G06K19/06
Filed: 2019-12-19
Abstract: 一种磁码信息识别系统和方法及其应用，磁码信息识别系统包括车载识别器（102）和磁极编码牌（101），车载识别器（102）采用预设磁片极性的车载识别码（7），磁极编码牌（101）利用磁极特性将所需信息隐藏于磁极编码矩阵序列（2）中，通过车载识别器（102）与磁极编码牌（101）的相互作用对磁极编码牌（101）的磁极编码矩阵序列（2）进行读取和识别。磁极编码牌（101）利用磁极进行信息编码存储，依次沿轨道铺设，由运行车辆携带车载识别器（102）进行沿途扫描识别读取位置、路况等信息，具备便捷、高效和经济价值高等优势。该方法可应用于中低速磁悬浮列车的车辆定位测速、路况信息获取等功能，也适用于常规轨道交通系统中绝对位置/速度的实时监测。
Patent WO-2020135280-A1 (WO)
Inventor: HUANG KAIWEN
IPC: C03C10/02
Filed: 2019-12-21
Abstract: 一种铝硅酸盐微晶玻璃及其制备方法和产品。除玻璃相外，其主晶相包括体积占比为5％-30％的MgAl 2O 4晶体、10％-30％的Li 2Si 2O 5晶体和5％-30％石英及石英固溶体，余量为其它不可避免的杂质。不可避免的杂质中可能包括生成MgAl 2O 4晶体、Li 2Si 2O 5晶体或石英及石英固溶体时的中间产物，以及其它在玻璃制作工艺中不可避免的杂质等。
Patent WO-2021134484-A1 (WO)
Title: Hydraulic lash adjuster for valve mechanism
Inventor: ZHU FENG
IPC: F01L1/245
Filed: 2019-12-31
Abstract: A hydraulic lash adjuster for a valve mechanism. The hydraulic lash adjuster comprises a cylindrical housing (1) and a plunger (2). The housing (1) has a closed end (11) and an open end (12). A first end (24) of the plunger (2) is inserted axially into the housing (1) from the open end (12). The plunger (2) has a hollow inner cavity (21). The inner cavity (21) has an inwardly and radially constricted neck (26) at the axial middle and an oil hole (23) running through the side wall of the neck. The end of the neck (26) axially facing the closed end (11) forms a first protrusion (22). The hydraulic lash adjuster further comprises a sleeve (3) and a sleeve spring (7) installed in the inner cavity (21). The sleeve (3) has an inwardly and radially constricted second protrusion (31) at the axial middle. The sleeve (3) is installed in an axially slidable manner in the inner cavity (21) between the first protrusion (22) and the first end (24) and can be axially stopped by the cooperation of the first protrusion (22) and the second protrusion (31). The oil hole (23) opens into the inner cavity (21) at the first protrusion (22), and the sleeve spring (7) axially abuts between the first end (24) and the sleeve (3). The hydraulic lash adjuster can effectively improve the oil storage amount in the plunger (2).
Patent WO-2021142799-A1 (WO)
Title: Path selection method and path selection device
Inventor: LIU YALIN
IPC: G01C21/34
Filed: 2020-01-17
Abstract: The present application provides a path selection method, used for determining an optimal obstacle avoidance path from a plurality of candidate paths, thereby improving path selection efficiency. The method comprises: obtaining basic road information of a target road region, location information of an obstacle in the target road region, and a plurality of candidate paths of a target object in the target road region; determining an obstacle risk relationship of the target road region according to the basic road information and the location information of the obstacle, the obstacle risk relationship being used for obtaining obstacle risk of any location in the target road region; determining comprehensive obstacle risk of each candidate path according to the obstacle risk relationship and location distribution of each of the plurality of candidate paths in the target road region; and determining a target path from the plurality of candidate paths according to the comprehensive obstacle risk of each candidate path.
Patent WO-2020186949-A1 (WO)
Title: Touch-control substrate, touch-control screen and touch-control display device
Inventor: WU XINGUO
IPC: G06F3/041
Filed: 2020-02-14
Abstract: Disclosed is a touch-control substrate (1A), comprising a base (01), a plurality of touch-control electrodes (11) provided on the base (01) and arranged in an array, and a plurality of signal lines (12) provided at one side, close to or away from the base (01), of the plurality of touch-control electrodes (11). The plurality of signal lines (12) comprise a plurality of touch-control lines (121) and a plurality of virtual touch-control lines (122), wherein at least one touch-control electrode (11) of the plurality of touch-control electrodes (11) is coupled to at least one touch-control line (121) of the plurality of touch-control lines (121). The at least one touch-control line (121) is configured to transmit a touch-control signal, and the at least one touch-control electrode (11) is coupled to at least one virtual touch-control line (122) of the plurality of virtual touch-control lines (122).
Patent WO-2021168856-A1 (WO)
Inventor: LIANG ZHIJIAN
IPC: G06F21/10
Filed: 2020-02-29
Abstract: Provided are a method, apparatus and system for digital rights management (DRM), wherein same can enable a DRM intercommunication operation between a DRM server and a client that are from different manufacturers. The method comprises: a DRM server encrypting a first media file by using a first encryption method to obtain a first encrypted media file; the DRM server generating content protection description information of the first encrypted media file, wherein the content protection description information comprises a content identifier and encryption method information, the content identifier is used for identifying the first encrypted media file, and the encryption method information is used for identifying the first encryption method; the DRM server performing first formatting on the content protection description information to generate formatted content protection data; the DRM server encapsulating the formatted content protection data to generate a content protection data packet; and the DRM server packaging the content protection data packet and the first encrypted media file, and then sending same to a client.
Patent WO-2020211571-A1 (WO)
Title: Soil preparation capable of preventing and treating neuroendocrine disorder-related diseases, preparation method therefor and application thereof
Inventor: ZHOU DONGRUI
IPC: A61P25/24
Filed: 2020-03-10
Abstract: A soil preparation, which is prepared from sterilized soil and oral probiotics or auxiliary materials, and an application of the soil preparation in preparing a drug for preventing and treating neuroendocrine disorder-related diseases.
Patent WO-2020182219-A1 (WO)
Inventor: ZHANG LI
IPC: H04N19/85
Filed: 2020-03-16
Abstract: L'invention concerne un procédé de traitement vidéo consistant à : effectuer une conversion entre un bloc vidéo courant d'une vidéo et une représentation codée d'un bloc vidéo courant, la conversion faisant appel à un mode de codage dans lequel le bloc vidéo courant est construit sur la base d'un premier domaine et d'un second domaine et/ou dans lequel un résidu de chrominance est mis à l'échelle d'une manière dépendant de la luminance, et des informations intervenant dans le mode de codage étant signalées dans un ensemble de paramètres qui est différent d'un ensemble de paramètres de séquence (SPS), d'un ensemble de paramètres vidéo (VPS), d'un ensemble de paramètres d'image (PPS), ou d'un ensemble de paramètres d'adaptation (APS) intervenant dans le transport de paramètres de filtrage à boucle adaptatif (ALF).
Patent WO-2020207209-A1 (WO)
Inventor: LIU QIANG
IPC: G05B19/05
Filed: 2020-03-17
Abstract: A parallel control method based on multi-period differential sampling and digital twin technologies, comprising the following steps: a. inspecting the processing status of dotting machine equipment by using a multi-period differential sampling technology; b. building a digital twin control model; and c. controlling a simulation model of the dotting machine equipment according to an inspection determination result, and then controlling the dotting machine equipment in parallel. According to the parallel control method, a simulation model and an inspection model of the dotting machine equipment are built for a digital twin model of the dotting machine equipment by using a virtual and physical synchronization technology; simulated dotting machine equipment and physical dotting machine equipment operate synchronously to implement real-time inspection and corresponding precise parallel control in a dotting process of the dotting machine equipment; the method enables an operator to remotely control the dotting machine equipment, and achieves one-to-many fast control, and therefore, the control operation is more convenient and precise.
Patent WO-2021189316-A1 (WO)
Title: 具有磁性过滤器的液压执行器和液压离合器执行机构
Inventor: WU PEIHENG
IPC: F16D25/08
Filed: 2020-03-25
Abstract: 一种具有磁性过滤器的液压执行器包括：壳体(1)，其用于容纳液体；缸体(2)，其形成于或者安装到所述壳体(1)；活塞杆(3)，其至少部分地伸入所述壳体(1)中；活塞(4)，其安装到所述活塞杆(3)的轴向一端并且能够在所述缸体(2)中往复移动；以及磁性过滤器(5)，其安装到所述缸体(2)的位于所述壳体(1)内的第一端(21)而用于吸附过滤所述液体中的金属颗粒。还提供一种液压离合器执行机构。
Patent WO-2021189446-A1 (WO)
Title: 辅助载波的睡眠指示方法、装置、终端及存储介质
Inventor: ZUO ZHISONG
IPC: H04W52/02
Filed: 2020-03-27
Abstract: 一种辅助载波的睡眠指示方法、装置、终端及存储介质，涉及无线通信领域。该方法包括：接收PDCCH上承载的DCI，所述DCI配置有至少一种指示域（510），所述指示域用于指示辅助载波的睡眠状态；根据所述至少一种指示域中的目标指示域，确定辅助载波的睡眠状态（520）。该方法解决了终端可能会同时接收到多种睡眠指示方式时如何处理的问题，明确了终端的行为进而提高了辅助载波的睡眠指示的准确性。
Patent WO-2021196028-A1 (WO)
Inventor: DONG YUYANG
IPC: H01M10/04
Filed: 2020-03-31
Abstract: 一种电池（100），包括电极组件（10）、第一绝缘层（20）、第二绝缘层（30）和第一粘接部（40）。电极组件（10）包括第一表面（101）以及与所述第一表面（101）相背设置的第二表面（103）；第一绝缘层（20）设置于所述第一表面（101）；第二绝缘层（30）设置于所述第一表面（101），且与所述第一绝缘层（20）沿一第一方向间隔设置；所述第一粘接部（40）设置于所述第一表面（101），并位于所述第一绝缘层（20）和所述第二绝缘层（30）之间的区域。该电池有利于提高耐冲击性能。
Patent WO-2021196204-A1 (WO)
Inventor: LIU HAOYUAN
IPC: H02S20/00
Filed: 2020-04-03
Abstract: A mosquito removal device applied to livestock breeding, comprising: a mosquito lured lamp(1) and a mosquito lured lamp holder (2); the mosquito lured lamp holder (2) comprises a base (201), a support rod (202) and a tray assembly, the tray assembly comprises at least three connecting rods (205a, 205b, 205c), a tray (204) is fixed by means of the connecting rods (205a, 205b, 205c), and when the mosquito lured lamp (1) is used, the mosquito lured lamp (1) is placed in the tray (204). The mosquito removal device effectively prevents the defects of easily shaking or even falling down of a mosquito lured lamp caused by a hanging mode of the mosquito lured lamp being unstable, effectively solves the defect of a poor power generation effect of a solar power generation panel of the mosquito lured lamp of a hanging mode, and the mosquito lured lamp is directly taken out from the tray, no mosquito dead bodies are accumulated in the mosquito lured lamp, and the mosquito lured lamp does not need to be subjected to removing of mosquito dead bodies.
Patent WO-2020211791-A1 (WO)
Inventor: LIN KENGYU
IPC: G06F9/48
Filed: 2020-04-15
Abstract: A method and device for anonymous page management, a terminal device, and a storage medium. The method comprises: monitoring in real-time whether a process having undergone a change in the priority thereof is present in a terminal device (S210); determining, on the basis of a monitored change in the priority of each process, a target process to be executed (S220); detecting whether a target anonymous page corresponding to said process is stored in an exchange space, where the exchange space is used for recycling anonymous pages (S230); and, if the target anonymous page is detected to be stored in the exchange space, then prereading the target anonymous page from the exchange space, thus directly using the target anonymous page when said process is being executed (S240).
Patent WO-2020216233-A1 (WO)
Title: Display cabinet
Inventor: LI LINGYUN
IPC: F25D17/04
Filed: 2020-04-22
Abstract: Disclosed is a display cabinet, comprising: a cabinet body (1), the cabinet body (1) comprising an outer shell (11) and an inner shell (12) embedded in the outer shell (11), the inner shell (12) forming an accommodating bin for accommodating articles (13); a first air duct (41) and a second air duct (42), arranged between the outer shell (11) and the inner shell (12), the first air duct (41) and the second air duct (42) being communicating with the accommodating bin (13); a first temperature regulating device (2), the first temperature regulating device (2) communicating with the first air duct (41); and a second temperature regulating device (3), the second temperature regulating device ( 3) communicating with the second air duct (42).
Patent WO-2020221100-A1 (WO)
Inventor: YANG LIN
IPC: F24F6/12
Filed: 2020-04-23
Abstract: 一种加湿器，包括：具有水槽（11）的底壳（1），密封设于底壳（1）上的水箱组件（2），设于水箱组件（2）内的、与水槽（11）连通的主出风管（3），以及设于底壳（1）内的雾化器（13）和风机；在水箱组件（2）上还设有封雾盒（4），封雾盒（4）具有封雾进风口（41）和封雾出风口（42），封雾盒（4）内具有弯折的封雾风道（43），封雾风道（43）连通封雾进风口（41）和封雾出风口（42），封雾出风口（42）与主出风管（3）对接连通，封雾进风口（41）与水槽（11）连通。该加湿器通过封雾盒内的弯折封雾风道，达到了降噪音的目的，且无需其他降噪结构，降低了成本和提高了材料利用率，同时减少结构便于生产组装和提高生产效率。