793 results about "Noise generation" patented technology

The invention discloses a gesture action video generation method and device based on fine-grained semantic description, and the method comprises the steps: carrying out the preprocessing and data enhancement of an original video, and constructing sample data composed of a video frame and a fine-grained semantic description text used for describing a gesture action in the video frame; constructing a training architecture consisting of a video coding module, a text coding module, a noise reduction generation module and a video decoding module; a loss function is constructed based on the difference between added noise in the video coding module and de-noised noise in the de-noising generation module, only parameters of the de-noising generation module are optimized by using the loss function, and a video generation model is formed by the text coding module, the de-noising generation module and the video decoding module after the parameters are optimized; and generating a gesture action video based on the input random vector and the fine-grained semantic description text for describing the gesture action by utilizing a video generation model. In this way, a high-quality general digital human video containing gesture actions is generated based on the fine-grained semantic description text.

The invention discloses a combined heat and power generation system control strategy based on an AME-TD3 algorithm, and belongs to the technical field of combined heat and power generation system optimization control. Comprising the following steps: S1, collecting system parameters and initializing a CHP running state; s2, when a target # imgabs0 # value is calculated, an entropy reward mechanism is introduced; s3, realizing exploration and utilization of an adaptive noise adjustment mechanism and a dynamic balance strategy based on Critic network evaluation; and S4, optimizing the control strategy in real time. Aiming at the problem that an existing TD3 algorithm is insufficient in exploratory performance, an entropy correction item is introduced into calculation of a target # imgabs1 # value, structural correction is conducted on a target value function, strategy updating is more efficient, and the effectiveness of overall strategy optimization is improved; aiming at the problem that random noise in a traditional TD3 algorithm cannot adapt to a complex environment, a dynamic self-adjusting noise generation function is added in a strategy updating process, so that the convergence speed is increased, the stability is enhanced, and the self-adaptive adjustment capability of a system to load fluctuation and environmental condition change is enhanced. The method has good expandability.

The invention discloses a first view angle video generation method and device based on a mask diffusion model and fixation point constraint, and the method comprises the steps: constructing an end-to-end deep learning frame for the demands of video filling, prediction and visual attention region control in the generation of a first view angle video; the diversified first-view-angle video generation conforming to the visual logic is realized. The method comprises the following steps: firstly, dividing an input video into a condition frame set and an unknown frame set, and adding random noise to an unknown frame by using a dynamic mask module I to generate a noisized frame; performing reverse de-noising generation on the video through a full 3D convolutional neural network module II, and guiding the network to generate video content conforming to a space-time law by taking a diffusion step and a fixation point track as conditional constraints; and finally, saliency prediction is carried out by using a fixation point positioning module III. By jointly optimizing the loss of the reverse denoising generation process and the loss of the fixation point probability graph, the reasonability and diversity of the generated video are further improved. According to the method, through joint optimization of the mask diffusion strategy and fixation point constraint, the space-time continuity, the anti-noise capability and the adaptability to the fixation point trajectory of the generated video can be effectively improved, and the method is particularly suitable for a complex multi-face expression interaction scene.

The invention belongs to the field of computer vision, and particularly relates to an edge detection technology based on Transfomer. Firstly, according to the method, a scale enhancement technology is adopted, and an input image is divided into a plurality of scales with different sizes, so that detail information in the image can be better processed; secondly, according to the method, a feature enhancement technology is adopted, and the features extracted by the network are enhanced, so that feature information is utilized more fully, and the accuracy and robustness of edge detection are improved. And finally, a feature fusion technology is introduced in the method, and features of different scales and different stages are fused, so that the feature expression capability is further enhanced, noise generation is effectively inhibited, and a clear edge is generated. Through comprehensive application of the processing technology, the edge detection method can effectively avoid the problems of loss of partial details of the edge, rough lines, disordered content, noise and illumination interference and the like when a complex background is processed, the accuracy and reliability of edge detection are improved, and meanwhile, the efficiency of edge detection is improved.

The invention provides a building LOD2 model diffusion generation method and system based on multi-modal feature constraints, and belongs to the field of remote sensing image processing. According to the method, a three-dimensional polygon noise generation module MM2P-Init and a multi-modal feature constraint module MM2D-Control are mainly utilized to construct a diffusion model MMP-DiffNet, a noise reduction generation process from three-dimensional polygon noise to a building roof structure is realized, the influence of extraction precision of low-dimensional features such as points and lines on a building LOD2 model topology reconstruction process is reduced, and the construction efficiency is improved. And the precision of building LOD2 model construction by the satellite image is improved.

The embodiment of the invention provides a robot control method and device, electronic equipment and a storage medium, belongs to the technical field of robots, and is applied to financial and medical scenes. The method comprises the steps of obtaining a current environment image and a current time stamp of an environment where the robot is located; generating noise according to a preset noise generation rule to obtain current noise; performing instruction coding according to a preset target task instruction, the current environment image and the current time stamp to obtain a target instruction code; performing noise fusion on the target instruction code according to the current noise to obtain a current fusion code; performing noise prediction on the current fusion code according to a preset target noise prediction model to obtain target prediction noise; performing instruction denoising on the current fusion code according to the target prediction noise to obtain a target execution instruction; and controlling the robot to execute actions according to the target execution instruction. According to the embodiment of the invention, the robot instruction can be restored from an uncertain state to an executable clear instruction.

The invention relates to the technical field of compressors, and provides a liquid accumulator support and a compressor, and the liquid accumulator support comprises a first welding part, a second welding part and a connecting part. Wherein a first groove is formed in the first welding part, and a shell of the compressor can be partially inserted into the first groove, attached to the inner wall of the first groove and fixedly welded to the inner wall of the first groove; a second groove is formed in the second welding part, and the liquid storage device can be partially inserted into the second groove, attached to the inner wall of the second groove and fixedly welded to the inner wall of the second groove; the first welding part and the second welding part are arranged on the two opposite sides of the connecting part and fixedly connected through the connecting part. Thus, the connection rigidity between the shell of the compressor and the liquid storage device is improved, according to the formula # imgabs0 #, f represents frequency, k represents rigidity, and m represents mass, it can be known that when the mass is fixed, the vibration frequency is in direct proportion to the rigidity, and after the connection rigidity is improved, the inherent frequency of the liquid storage device is effectively improved, so that the resonance problem of a low-frequency band is avoided, and the service life of the liquid storage device is prolonged. And the condition of noise generation is improved.

To prevent noise generated in the heat source unit's machine room from leaking to the outside. [Solution] The outdoor unit (20) includes a partition structure (70) that divides the inside of the casing (40) into a machine chamber (S1) and a blower chamber (S2), a compressor (30) arranged in the machine chamber, and a blower (22) and an outdoor heat exchanger (21) arranged in the blower chamber. The outdoor heat exchanger has a plurality of flat tubes (52), fins (55) that divide the spaces between adjacent flat tubes into a plurality of ventilation passages (56), and a first header (60) to which the ends of the plurality of flat tubes are connected. The partition structure includes the first header, a first partition (71) that divides the windward side of the first header, and a second partition (100) that divides the leeward side of the first header.

The invention relates to a wind noise modeling method and system based on machine learning and application, and belongs to the field of marine acoustics and environmental noise modeling, and the method comprises the steps of data preprocessing and feature extraction, hybrid network model building, hybrid network model training and verification. According to the method, a hybrid network model of multiple linear regression and a multi-layer perceptron is constructed based on a known physical mechanism of wind noise and two main noise generation mechanisms of surface turbulence and bubble oscillation, a linear relation and a non-linear relation are modeled respectively, outputs of the two models are integrated through a weighted fusion strategy, and a multi-layer perceptron model is constructed. Smooth transition modeling from a low-wind-speed linear relation to a high-wind-speed nonlinear relation is achieved.

The invention discloses an anisotropic noise generation method based on local tensor integral field feature modulation, and is applied to the technical field of computer texture generation. The method comprises the following steps: step 1, constructing a global tensor field of spatial anisotropy intensity and direction; step 2, calculating local tensor integral features in a support domain based on the support domain of a Gabor noise kernel function, the local tensor integral features including principal direction features and anisotropic ratio features; step 3, calculating a curvature penalty factor based on the deviation between the local tensor integral feature and the center tensor of the seed point; step 4, based on the local tensor integral features, performing weighted correction on the frequency domain center frequency and Gaussian envelope parameters of the Gabor kernel function; and step 5, generating a final noise texture based on the corrected kernel function. The Gabor kernel function parameter is subjected to weighted correction through the local tensor integral feature and the curvature penalty factor, modulation of the kernel function direction under the high-curvature tensor field is achieved, spectrum leakage, texture fracture and artifacts caused by inconsistent direction changes in the kernel function can be reduced, and the robustness of the kernel function is improved. Therefore, the topological continuity and the simulation fidelity of the anisotropic noise texture at the complex structure are improved.

A door lock for a vehicle includes a rotary latch for form-fittingly holding a locking element, a blocking mechanism for blocking the rotary latch from releasing, and a wedge system having a wedge lever and a connection piece, which can be brought into a self-locking contact position in order to reduce a relative movement between the locking element and the rotary latch. The blocking mechanism contacts a circumference of an output lever via a circular-arc-shaped circumferential segment so that, when the blocking mechanism moves, the output lever is rotated by rolling on the circumferential segment. The output lever is coupled with a driving lever so that the rotation of the output lever during the opening movement of the blocking mechanism causes the driving lever to release the self-locking connection between the wedge lever and the connection piece.

The utility model relates to a multi-noise-reduction control box and a pillow using the same, which solve the problem that in the prior art, noise is generated by working of an air pump and airflow driven by the air pump to bring adverse effects to a user, and adopts the technical scheme that the multi-noise-reduction control box comprises a shell, the air pump arranged in the shell and a circuit board used for controlling the air pump to work, the utility model relates to a noise reduction device, in particular to a noise reduction device which comprises an outer shell, an air pump and an air path mechanism connected with the air pump, and is characterized in that an inner shell is arranged in an inner cavity of the outer shell, the outer shell is connected with the inner shell in a vibration reduction mode, the air pump is arranged in the inner cavity of the inner shell and hung on the top wall of the inner shell, and a noise reduction shell is arranged outside the air pump. The control box has the advantages that multiple noise reduction means such as a double-shell structure matched with vibration reduction and noise reduction are adopted, the air pump is hung, and the noise reduction shell covers the air pump are adopted, so that working vibration and working noise reduction of the control box are greatly reduced.

The invention relates to the technical field of noise evaluation, in particular to a self-ventilation motor fan aerodynamic noise simulation evaluation method. According to the technical scheme, the method comprises the steps of data acquisition and processing, deep learning model construction, simulation and optimization of a multi-physics coupling model and result fusion. According to the method, the hybrid deep learning model combining the convolutional neural network and the recurrent neural network is adopted, so that the noise prediction precision is remarkably improved, and the evaluation result is closer to the actual noise condition; a multi-physics coupling model is adopted to reflect the comprehensive influence of multiple factors on aerodynamic noise under actual working conditions, a noise generation mechanism is analyzed through a CFD model and an acoustic FEM model, a reliable physical basis is provided for noise evaluation, and errors are reduced; besides, the Bayesian fusion method is combined with the results of the deep learning model and the multi-physics field coupling model, the advantages of the two methods are comprehensively considered, the limitation of a single method is made up, and the reliability and stability of the evaluation result are further improved.

An intelligent induction ball throwing machine, which relates to the field of pet toy technology. It includes: a shell, a ball-serving wheel, a driver, a processor and a first sensor; a goal hole is provided at the upper end of the shell, a ball-serving hole is provided at the front end, and a slideway is provided between the goal hole and the ball-serving hole; the ball-serving wheel is provided in the shell, and partially extends into the slideway, and is used to shoot the ball passing through the slideway out of the ball-serving hole; the driver is provided in the shell, and is used to drive the ball-serving wheel to rotate; the processor is provided in the shell, and is electrically connected to the driver, and is used to control the opening and closing of the driver; the first sensor is provided on the shell, and is electrically connected to the processor, and is used to sense whether a person or animal is approaching; when the first sensor senses that a person or animal is approaching, it feeds back information to the processor, and the processor controls the driver to start working, thereby driving the ball-serving wheel to rotate. The above technical solution has the advantages of improving product endurance and reducing noise generation.

The utility model provides an electronic expansion valve which comprises a valve pipe, a valve seat part, a nut structure, a valve needle structure and a hollow noise reduction column, the valve seat part is connected with one end of the valve pipe, and the valve seat part is provided with a valve port; at least one part of the nut structure is located in the valve pipe, and the nut structure is fixedly connected with the valve seat part; the valve needle structure movably penetrates through the nut structure so as to open and close the electronic expansion valve and adjust the opening degree of the valve port. One end of the noise reduction column is in limiting fit with the valve seat part, the other end of the noise reduction column is in limiting fit with the nut structure, and the noise reduction column is arranged around the valve port and the valve needle structure; the nut structure is provided with a communication channel, and the communication channel enables the inner cavity and the outer cavity of the noise reduction column to be communicated so as to discharge impurities, remaining in the noise reduction column, in fluid. When fluid flows through the noise reduction columns, the noise reduction columns refine bubbles in the fluid for noise reduction. And impurities in the noise reduction column are discharged out of the noise reduction column through the communication channel. According to the scheme, the problem that noise is generated in the using process of the electronic expansion valve is solved, and impurity blockage is avoided.

A low-noise brushless electric motor, comprising: a stator assembly comprising a base (101) and a winding stator (102), wherein the base (101) comprises an end cover (103) and a sleeve (104) formed on one side of the end cover (103), the winding stator (102) is arranged around the outer wall of the sleeve (104), the sleeve (104) is made of a metal material, and a first mounting groove (105) and a second mounting groove (106) that are spaced apart from each other are formed in the sleeve (104); a bearing assembly comprising a first bearing (301), a first limiting member and a second bearing (302), wherein the first bearing (301) is arranged in the first mounting groove (105) and is in clearance fit with a groove wall (110) of the first mounting groove (105), and the second bearing (302) is arranged in the second mounting groove (106) and is in clearance fit with a groove wall (112) of the second mounting groove (106); and a rotor assembly comprising a rotary shaft (201), a housing (204) fixed on the rotary shaft (201), and a plurality of magnetic steels (202) arranged on an inner wall of the housing (204), wherein the rotary shaft (201) passes through the second bearing (302) and the first bearing (301) and is connected to the first limiting member, the second bearing (302) is in limiting fit with the rotary shaft (201), and the first bearing (301) axially abuts against the first limiting member to be axially limited on the rotary shaft (201). The low-noise brushless electric motor can reduce bearing deformation and minimize noise generation.

To provide an alignment jig capable of realizing high-precision alignment of through holes with each other regardless of an overlapping state of the through holes, while suppressing noise generation.SOLUTION: A positioning jig for aligning through holes formed in each of a plurality of building materials constituting a building with each other comprises: a pin that includes a body portion capable of being inserted through a through hole and includes a tapered portion whose diameter decreases toward a tip side of the body portion, and a male threaded portion located more at the tip side of the body portion than the tapered portion; and a nut in which a threaded hole including a female threaded portion that is screwed into the male threaded portion is formed. The nut includes a convex portion protruding in a hemispherical shape and having an inlet port of the threaded hole.SELECTED DRAWING: Figure 1

The utility model discloses an indoor PVC drainage pipe with a noise reduction structure in the field of PVC drainage pipes, which comprises a flow guide pipe and a flow dividing pipe, the flow dividing pipe is hollow and is provided with a first drainage part, an inner pipe is arranged in the middle of the flow dividing pipe, the first drainage part is spirally wound on the outer wall of the inner pipe, the flow guide pipe is hollow and is provided with a second drainage part, and the second drainage part is arranged in the flow dividing pipe. When the water drainage amount is large, part of water flow is drained along the water drainage channel, and part of the water flow is guided by the first drainage part to flow into the second drainage part along the first flow dividing channel and is drained from the bottom end of the flow guide pipe along the second flow dividing channel. According to the PVC drainage pipe, the drainage amount can be effectively shared under the action of flow division, the phenomenon that noise is generated due to the fact that water flow knocks the inner wall of the PVC drainage pipe in the drainage process is reduced, on the other hand, the second drainage part can fix the inner pipe, the inner pipe cannot shake due to impact of the water flow, and the overall noise reduction effect of the PVC drainage pipe is further improved.

The embodiment of the invention discloses a noise generation circuit, a noise generation method and recording shielding equipment, which are used for preventing signals from being monitored. According to the embodiment of the invention, a signal source is connected with a signal generation module and a first modulation module; and the signal generation module is used for sending at least one first ultrasonic wave to a receiving end. The first modulation module is connected with the first noise module, and the first modulation module is used for receiving a first noise signal generated by the first noise module and modulating the first noise signal and the frequency signal to obtain a first modulation signal; the first driving module is connected with the first modulation module and the first probe module, and the first driving module is used for generating a first driving signal according to the first modulation signal and sending the first driving signal to the first probe module. The first probe module sends a second ultrasonic wave according to the first driving signal so as to generate a difference frequency signal overlapped with a part of frequency band or all frequency band of the protected audio signal with the first ultrasonic wave.

The invention discloses a sound insulation and noise reduction water supply and drainage pipeline, and belongs to the technical field of water supply and drainage pipelines, the sound insulation and noise reduction water supply and drainage pipeline comprises a pipeline body and a connecting mechanism, the pipeline body comprises an outer pipe body, an inner pipe body, a supporting ring and a sealing ring, and an exhaust mechanism is arranged at the top of the outer pipe body and comprises an exhaust pipe, a sealing cover and a one-way valve; the two ends of the outer side of the outer pipe body are fixedly sleeved with fixing rings. The connecting mechanism comprises a front connecting base, a rear connecting base, a connecting frame, a fixing frame and a plug pin. The interlayer space between the inner pipe body and the outer pipe body is vacuumized and reliably sealed, the transmission path of sound in the structure is effectively cut off, outward transmission of noise generated by water flow in the pipe and vibration of the pipe is remarkably blocked in the vacuum state, and the overall sound insulation performance is greatly improved; the core measure is supplemented with the design of the supporting ring and the elastic sealing ring, vibration buffering is provided at a key connecting point, energy is absorbed and dissipated, and excellent environmental noise control is comprehensively achieved.

The invention relates to a monitoring and early warning system for preventing teenager myopia, which captures teenager eye using behavior characteristics in real time in a dynamic environment and accurately recognizes an abnormal state through cooperative work of multiple modules, and eliminates space-time dislocation interference among equipment by using three-dimensional topology modeling, so that the system can be used for preventing teenager myopia. The double-frequency attention mechanism effectively separates eye physiological signals and environmental noise, the electromagnetic constraint noise generation technology restores a real interference scene, the gradient coupling mechanism continuously optimizes the equipment relation network, finally high-precision eye use behavior recognition is achieved, early warning is conducted on myopia inducements such as short-distance eye use overtime and illumination discomfort, and the myopia identification accuracy is improved. Through a personalized intervention scheme, the false alarm rate is remarkably reduced, the user compliance is improved, the myopia development speed of teenagers is effectively delayed, and a'monitoring-early warning-intervention 'closed-loop prevention and control system is formed.

The utility model discloses an air duct structure and an air curtain machine. The air curtain machine comprises a shell, an air duct structure and a wind wheel structure. The shell is provided with an air inlet and a wind wheel chamber, and the air inlet is communicated with the wind wheel chamber. The air duct structure is provided with an air inlet end and an air outlet end, and the air inlet end communicates with the wind wheel chamber; the air duct structure comprises two air duct side plates which are arranged in a spaced mode. The air duct side plate comprises a protruding part and two connecting parts, the connecting parts are fixed relative to the shell, the protruding part is arranged between the two connecting parts, the protruding part protrudes towards the inner side of the air duct structure, and the protruding part and the connecting parts are in arc smooth transition. The wind wheel structure is rotationally installed in the wind wheel chamber and used for driving air to flow from the air inlet to the air duct structure. According to the air duct side plate, by arranging the protruding parts, air can be guided, transition of air flow is smoother, the air can be prevented from directly colliding with the inner side wall of the air duct side plate, after collision is reduced, vortex generation can be restrained, and therefore noise generation can be reduced.

The invention provides a privacy protection noise generation method based on black box adversarial samples, and relates to the technical field of noise generation. Comprising the steps of constructing a voice data set; randomly generating initial white noise data; superposing the initial white noise data and target voice in the voice data set to obtain a superposed voice data set; performing data amplification on the superposed voice data set to obtain an amplified data set; inputting the amplified data set into a local white-box speech recognition model to obtain final white noise data; performing noise amplification on the final white noise data, and superposing the final white noise data with the voice data set to obtain a multi-intensity noise-added voice data set; and performing fine tuning training on the local white box model by using the multi-intensity noise-added voice data set to obtain a final noise generation model so as to generate final privacy protection noise. The technical problem that interference noise cannot be optimized based on an adversarial sample technology when the black box model parameters and architecture cannot be obtained and only the final recognition result can be obtained in the prior art is solved.

The utility model relates to a multi-noise-reduction control box and a pillow using the same, which solve the problem in the prior art that normal use is affected by loud noise generated when an air bag in the pillow is inflated or deflated, and adopt the technical scheme that the multi-noise-reduction control box comprises a shell and an air pump arranged in the shell, the noise reduction device comprises an air pump, a circuit board used for controlling the air pump to work and an air path mechanism connected with the air pump, and is characterized by further comprising a noise reduction pump shell, the air pump is arranged in the noise reduction pump shell, and the noise reduction pump shell is used for isolating noise generated by the air pump to achieve the purpose of noise reduction of the air pump. The noise-reduction air pump has the technical effects that the air pump mainly generating vibration and noise is arranged in the noise-reduction pump shell, so that the purpose of greatly reducing the noise of the control box is achieved, components easily generating vibration and / or noise are arranged in the second shell, the second shell mainly plays a role in sound insulation and noise reduction, and the noise-reduction effect is achieved. And vibration and noise transmitted to the first shell are reduced, so that vibration and noise generated when the whole control box works are reduced, and the purpose of multiple noise reduction is achieved.

Systems and methods for a heat pump water heater with an external muffler for reducing noise are provided. The heat pump water heater may include a compressor and other components that may generate a noise during operation. The noise may emanate through air inlet and / or outlets of the heat pump water heater. To reduce the noise emitted from the heat pump water heater, a muffler designed to obstruct and / or absorb soundwaves may be secured to the air outlet and / or air inlet of the heat pump water heater. The muffler may include a cylindrical housing with baffles attached along an interior surface. The baffles may overlap one another such that sound waves are obstructed. The baffles may be perforated for facilitating airflow and / or the cylindrical structure may include a liner for absorbing sound waves. In this manner a heat pump water heater with reduced noise during operation may be achieved.

The utility model relates to the technical field of central air conditioners, and discloses a central air conditioner air outlet device with a noise reduction function, which comprises a mounting frame and a mounting piece, and a noise reduction mechanism is arranged on the side surface of the mounting frame; the noise reduction mechanism comprises a fixing sleeve. When vortex is generated in the air outlet of the central air conditioner and noise is large, a servo motor is started to drive a first connecting rod to rotate, drive a first gear to rotate, drive a rack belt to rotate and drive a second gear and a second connecting rod to rotate; a first adjusting plate and a second adjusting plate which are mounted on the side faces of a first connecting rod and a second connecting rod are driven to conduct angle deflection, the flowing direction of cold air above an air outlet is adjusted, then vortexes are reduced or damaged, noise is reduced or eliminated, a small part of noise can be absorbed through sound absorption cotton, noise generation is reduced again, and the noise reduction effect is improved. The problem that noise of an air outlet is large due to the internal vortex effect of a traditional central air conditioner can be solved, and the practicability and the use scene of the central air conditioner are improved.

This utility model belongs to the technical field of sewage treatment equipment, and provides an open channel ultraviolet disinfection device, including a mounting plate, a disinfection box, a cleaning frame, brushes, connecting ropes, and a drive mechanism. The mounting plate has multiple vertically penetrating and parallel strip-shaped mounting holes, and through holes are respectively opened at the four corners of the mounting plate. The lower end of the disinfection box passes through the corresponding strip-shaped mounting holes. The disinfection box contains multiple ultraviolet lamps. The cleaning frame is vertically movable and positioned below the mounting plate. The brushes are connected to the cleaning frame, and one end of the connecting rope passes through the corresponding through hole and connects to the cleaning frame. This utility model uses a drive mechanism to move the connecting ropes to achieve the lifting and lowering of the cleaning frame, thereby cleaning the lower end of the disinfection box. Because there are four connecting ropes, the cleaning frame is evenly stressed when the drive mechanism drives the connecting ropes, preventing the cleaning frame from tilting and ensuring stable lifting and lowering operation, thus reducing noise generation.

According to the shell module, the examination couch and the scanning equipment, the shell module comprises a shell assembly and a sliding rail assembly, the shell assembly comprises a plurality of shells, the multiple shells are sequentially arranged in a sleeving mode, and any two adjacent shells in the multiple shells are in sliding connection through the sliding rail assembly in the vertical direction. In other words, the shell assembly can guide the movement of the two adjacent shells in the vertical direction through the sliding rail assembly, so that the shell assembly can only move in the vertical direction. In this way, the situation that in the movement process of the whole shell module, due to the fact that the shell modules are subjected to external force, the shells between different layers rub against one another, noise, abnormal sounds or jamming are generated is avoided, and the use experience of the examining table with the shell module is improved.

The invention provides an indoor unit and an air conditioner. The indoor unit comprises a shell; the air port assembly is arranged at the air port, and the air port assembly is provided with an indoor communication port and a fan communication port; and the air guide plate is arranged in the air port assembly, and the air guide plate can guide air flow of the fan communication port to the indoor communication port. According to the indoor unit and the air conditioner, the air deflector in the air opening assembly is utilized, the air opening communicating opening of the air opening assembly communicates with the air outlet of the draught fan, so that air outlet airflow of the draught fan flows to the indoor communicating opening through the draught fan communicating opening, meanwhile, the air deflector can guide the part of air outlet airflow, and the air outlet airflow is more uniform. According to the indoor unit, turbulent flow is prevented from being generated in the air port assembly, the problem that noise is generated due to the turbulent flow in the prior art is effectively solved, it can be guaranteed that all the air outlet airflow can be smoothly fed into a room, and the working efficiency of the indoor unit is effectively improved.

The application provides a flow control method based on three-curved-surface fish scale bionic structure, comprising the following steps: S1, constructing a main structure of an impeller blade, including a suction surface e and a pressure surface f, and fish scale areas g with multiple fish scale bionic structure coupling elements arranged regularly are arranged on the suction surface e and the pressure surface f; S2, constructing and designing a single fish scale bionic structure coupling element, including a bottom surface adhering to a blade surface, a top surface in a fish scale structure, and a rear side cylindrical surface; the top surface comprises two groups of parallel fold surfaces, and each group of fold surfaces is composed of three quadrilateral surfaces; a space rectangular coordinate system is established with a front end point of the bottom surface as an origin, and the fish scale bionic structure coupling element is constructed in the space rectangular coordinate system; and S3, establishing multiple fish scale bionic structure arrangement rules. The application can improve the fluid flow characteristics of the blade surface and reduce noise generation based on the control of flow by bionic structure.