49results about How to "Improve suction effect" patented technology

The invention relates to the technical field of colla corii asini decocting, and discloses an automatic colla corii asini decocting device which comprises a decocting pot body, a mounting frame is fixed to the decocting pot body, a first servo motor is fixed to the mounting frame, the output end of the first servo motor is connected with a rotating shaft, the rotating shaft is connected with a stirring rod, and the stirring rod is connected with a motor. A rotating shaft is fixed on the mounting frame, a material collecting box is arranged on the circumference of the rotating shaft, an air extracting pump communicated with the material collecting box is fixed on the mounting frame, a defoaming mechanism is fixed at the bottom of the material collecting box, and the defoaming mechanism removes floating foam above the liquid level through air suction; according to the technical scheme, when the rotating shaft drives the stirring rods to stir liquid, the defoaming mechanism can be driven to rotate together, so that the defoaming mechanism can firstly collect scum on the surface of the liquid, and after collection, air suction is performed through the air suction pump, so that the defoaming mechanism generates negative pressure to suck out the scum in the material receiving groove, and the scum removal work is facilitated.

The utility model relates to a welding smoke purification device which comprises a workbench, an air draft assembly used for conducting air draft on the upper end face of the workbench is arranged on the workbench, the air draft assembly comprises an air draft part, an adjusting assembly used for adjusting the position of the air draft part, an air pump and an air draft pipe, and the adjusting assembly is arranged on the workbench; the adjusting assembly comprises a supporting frame, a rotating part and a sliding part, the lower end of the supporting frame is fixedly installed on the workbench, the upper end of the rotating part is rotationally connected to the lower end face of the supporting frame along the horizontal plane, and the sliding part is slidably arranged on the rotating part in the length direction of the rotating part; the side, close to the workbench, of the air draft part is provided with an air draft opening used for allowing smoke to enter the air draft part, one end of the air draft pipe communicates with the air draft part, and the air pump is arranged at the end, away from the air draft part, of the air draft pipe.

The invention discloses a double-balloon in-aorta balloon counterpulsation device, and relates to the technical field of medical equipment. The balloon catheter comprises a control host, a catheter shaft, a main balloon and an auxiliary balloon, the catheter shaft is arranged on the control host, and the main balloon and the auxiliary balloon are arranged at the other end of the catheter shaft; the main balloon is a long-strip-shaped hollow air bag, the auxiliary balloon is any one of a cylindrical hollow air bag, a conical hollow air bag and a hemispherical hollow air bag, and an inner cavity of the main balloon is larger than an inner cavity of the auxiliary balloon. A guide wire channel is arranged in the catheter shaft and penetrates through the auxiliary balloon and the main balloon; by arranging the main balloon and the auxiliary balloon, when the left ventricle begins to contract and the aortic valve is opened, the main balloon begins to contract, and meanwhile, the auxiliary balloon delays to start to contract, so that the suction resistance to the telecentric end when the main balloon contracts is increased, the reverse blood flow extracted from the telecentric end is reduced, the suction effect on the proximal end is improved, and the cardiac output is increased.

The utility model discloses a smoke exhaust ventilator and an oil smoke exhaust system, which belong to the technical field of smoke exhaust ventilators, and comprise a main machine provided with an air inlet, the main machine is used for absorbing oil smoke through the air inlet, the air inlet is provided with two groups of movable door plates which are opened and closed oppositely, and the two groups of movable door plates are used for changing the opening area of the air inlet through opening and closing. According to the range hood disclosed by the utility model, the area of the air inlet is set to be adjustable, so that the pressure of the air inlet is changed, the suction effect of the range hood is further improved, the application range of the range hood is effectively expanded, and the range hood has relatively high applicability.

The utility model discloses a water quality sampling equipment for water environment pollution prevention and treatment belongs to water quality sampling technical field, aims at solving the problem that sampling part of prior art is directly exposed to outside environment, is vulnerable to collision, scratch and other damage. Including fixed frame, suction assembly and handle, fixed frame is U shape structure, and the inside rotation of fixed frame is installed with the rotation axis of horizontal arrangement, and suction assembly sets up on the rotation axis and rotates synchronously, and multiple groups are arranged at suction assembly interval. Suction assembly includes liquid storage pipe, mounting block and pull block, and the bottom end surface of liquid storage pipe is fixedly connected with mounting block, and mounting block is L shape structure, and pull block sets up between liquid storage pipe and mounting block, and the vertical inner sliding slot is seted up on the lateral wall of mounting block. The water quality sampling equipment for water environment pollution prevention and treatment, under the non - sampling state, suction assembly can be stably received in the inside of fixed frame, and the risk of equipment damage caused by collision, scratch and the like in the complex field environment is reduced.

The present invention provides a range hood, which relates to the technical field of kitchen appliances. The range hood includes a smoke collecting hood and a smoke guide plate. The smoke collecting panel of the smoke collecting hood is provided with a smoke inlet. The smoke guide plate is located outside the smoke inlet and corresponds to the smoke inlet. The left area of ​​the inner wall of the smoke guide plate is rotatably connected to a left supporting arm, and the right area is rotatably connected to a right supporting arm. The smoke collecting hood is equipped with a driving device. The driving end of the driving device is connected to the left supporting arm and the right supporting arm, and is used to drive the left supporting arm and the right supporting arm to perform telescopic movement. The smoke guide plate rotates relative to the smoke collecting panel under the telescopic action of the left supporting arm and the right supporting arm, and forms a left smoke collecting chamber and / or a right smoke collecting chamber with the smoke collecting panel. The range hood can adjust the form of the smoke collecting chamber formed by the smoke guide plate according to the user's use of the burner, so that the suction intensity when cooking with a single burner is greatly enhanced, and the suction effect of the range hood on cooking with a single burner is correspondingly improved.

The utility model relates to the technical field of engine connecting rod cracking, in particular to a connecting rod slag suction device. The device comprises a large-head positioning block, the large-head positioning block comprises a fixed base and a positioning column, and the positioning column is fixedly arranged on the top face of the fixed base; two opposite sides of the fixed base are provided with slag suction channels, and each slag suction channel is provided with a slag inlet and a slag outlet which are communicated with the wall surface of the fixed base; the pipeline connecting seat comprises a mounting plate and a connecting pipe fixedly connected to one side of the mounting plate; the mounting plate is fixedly connected to the fixed base in a matched mode, and a first receding hole communicated with the slag outlet is formed in the mounting plate in a penetrating mode. The connecting pipe is communicated with the first avoiding hole; and the suction device is connected with the connecting pipe through a pipeline and is used for sucking and sweeping the dregs. According to the device, the double slag suction channels are arranged corresponding to two connecting rod separation surfaces, so that the suction caliber is reduced, and the suction force at the connecting rod separation surfaces is enhanced.

The invention provides a fan and electric equipment, and belongs to the field of fans. The fan comprises a centrifugal impeller, an air inlet cover, an axial flow impeller and a fluid director. The air inlet cover is arranged on the outer side of the centrifugal impeller in a covering mode and provided with an air inlet located in the upstream of the centrifugal impeller and an air channel communicated with the air inlet and used for guiding airflow to be exhausted in the axial direction of the draught fan. The axial flow impeller is arranged at the downstream of the air duct and is used for doing work on air flow exhausted by the air duct; the fluid director is arranged on the downstream portion of the axial flow impeller and used for guiding airflow exhausted from the axial flow impeller to flow in the axial direction of the draught fan. Compared with a single-stage acting structure, the fan and the electric equipment provided by the invention are more beneficial to improving the overall pressure rise and suction capacity and reducing noise, so that airflow is stably output in the axial direction, and the quality of an airflow outlet flow field and the energy utilization efficiency are improved.

The present invention discloses a split-type high-efficiency fume capture device for annular cooler unloading, comprising a split-type unloading hood and T-shaped sealing grooves arranged on both sides of the lower end of the split-type unloading hood; wherein the split-type unloading hood is connected to the annular cooler platform through the T-shaped sealing groove, and the split-type unloading hood is sleeved on the top of the annular cooler trolley; a plurality of air suction ports are arranged in the middle of the upper part of the split-type unloading hood; guide plates are arranged on both sides of the bottom of the split-type unloading hood, and the guide plates are located below the air suction ports, wherein the plurality of air suction ports are connected to dust removal pipelines for capturing smoke at the annular cooler unloading place of the sintering machine; the present invention changes the structure of the split-type unloading hood and arranges T-shaped sealing grooves to prevent smoke from escaping, thereby effectively improving the dust capture efficiency.

The invention provides a hyperbaric oxygen chamber oxygen inhalation mask for a patient with an indwelling stomach tube, and belongs to the technical field of medical instruments. Comprising an oxygen inhalation mask, a sputum suction mechanism is arranged on the inner side of the oxygen inhalation mask and used for sucking and removing sputum on the inner side of the nasal cavity of a stomach tube patient, the sputum suction mechanism comprises a second rubber hose fixedly connected to the inner side of the oxygen inhalation mask, and one end of the second rubber hose is fixedly connected with a corrugated hose; one end of the corrugated hose is fixedly connected with a first rubber hose; the stomach tube is arranged on the inner side of the second rubber hose and penetrates through the inner side of the first rubber hose, and sealing rubber used for sealing the first rubber hose and the stomach tube is arranged at the contact position of the inner side of the first rubber hose and the stomach tube. Through mutual cooperation of the sputum suction mechanism and the sputum removal mechanism, sputum in the nasal cavity can be sucked into the inner side of the corrugated hose through the Z-shaped through hole, and the effect of cleaning the nasal cavity of a patient is achieved.

A switch belongs to the technical field of low-voltage apparatus parts. Comprising a shell in which a first accommodating space is formed; the contact system comprises a static contact assembly and a moving contact assembly, the static contact assembly is arranged in the first accommodating space, and the moving contact assembly is arranged in the first accommodating space; the electromagnetic operating mechanism comprises a fixed iron core and a movable iron core; the pair of mounting side plates are fixedly arranged on the shell in a face-to-face manner; the main shaft is arranged on the mounting side plate and is provided with a transmission part; the fixed iron core is arranged on the pair of installation side plates, the movable iron core and the main shaft are fixedly arranged, the fixed iron core and the movable iron core are attracted through excitation of an electromagnetic coil arranged in the fixed iron core, the movable iron core drives the main shaft to rotate in the rotating process, and the transmission component drives the movable contact assembly to make contact with the static contact assembly to achieve closing. The device has the advantages that the structural stability is improved; the pull-in effect of the fixed iron core and the movable iron core is improved, and the closing reliability of the movable contact assembly and the static contact assembly is guaranteed.

The utility model discloses a kind of air-insulated ring network switch devices of temperature rise control, the air-insulated ring network switch devices of temperature rise control include box, ring network switch device body, multiple first partitions are equipped in the box, and the equipment area of accommodating single ring network switch device body is formed, the both sides of the ring network switch device body are equipped with side plate, the side plate is equipped with several equidistance first radiating fins, the bottom of the equipment area is equipped with several equidistance ventilation holes. Hot air inside box is sucked to outside by heat dissipation fan, cold air enters by ventilation hole, and heat exchange is carried out with first radiating fin, and the suction efficiency of flow guide groove is improved, hot air is conducted to second radiating fin by radiating portion on the top of box, and hot air is discharged by top cover, and the heat dissipation effect is enhanced, by optimizing hot air flow path and the mutual cooperation of multiple radiating structures, reduce local overheating risk, improve equipment operation stability and security.

The present invention discloses an air guide ring, a centrifugal fan and a range hood, wherein the air guide ring is used for the centrifugal fan, and the air guide ring is used to be installed at the air inlet of the centrifugal fan, and the air guide ring comprises: an annular air guide portion, the annular air guide portion is at least partially configured to be constricted in the air inlet direction, the inner edge of the annular air guide portion is used to extend into the volute of the centrifugal fan, the inner edge of the annular air guide portion comprises a shallowest point and a deepest point, and the deepest point protrudes from the shallowest point in the air inlet direction; and a mounting portion, which is arranged at the outer edge of the annular air guide portion. In this way, the adaptability of the centrifugal fan to the air supply environment with unstable wind pressure can be improved.

The utility model discloses a safety testing device for an intelligent terminal of a gas meter, which comprises a safety testing device, and the top of the safety testing device is communicated with a detection joint. According to the utility model, the detection joint is moved to the periphery of the safety test device, then a user starts the control assembly, rotates the sealing plate, enables the opening and the rectangular groove to be ventilated, then the user starts the fan, the fan blows air to the top, the air force extrudes the convex block, the convex block moves upwards, and the ventilation opening is opened. Meanwhile, the bottom of the fan conducts air draft, air around the safety testing device is absorbed into the sealing pipe, meanwhile, the control assembly is closed, the bottom of the sealing pipe is sealed, meanwhile, the fan is closed, wind power at the bottom of the protruding block disappears, the spring rebounds to reset the protruding block, and then the air in the sealing pipe is detected through the safety testing device; and the safety test device achieves the effect of facilitating accurate detection.

The present application relates to the technical fields of chemical filling, in particular to a clean automatic filling gun and gun seat for barrel-packed wet electronic chemicals, which comprises a filling gun and a gun seat used for clamping and fixing the filling gun, a movable arm with telescopic function is arranged on the side wall of the gun seat, a driving mechanism used for driving the whole movable arm to move is arranged on the gun seat, a female clamping seat is arranged at the end of the movable arm away from the gun seat, the filling gun is clamped and fixed with the female clamping seat, a gas baffle used for blocking the diffusion of corrosive tail gas is arranged on the female clamping seat, the movable arm is hollow and communicates with the gas baffle, and a communication structure used for communicating the movable arm with an external air extraction and exhaust system is arranged on the gun seat. The present application has the effect of improving the air extraction effect of corrosive tail gas generated in the process of filling wet electronic chemicals, thereby improving the safety in the process of filling wet electronic chemicals.

The stable tobacco powder and rubber powder removing device for the ZJ17 cigarette making and plug assembling machine comprises a body arranged between a paper cutter and a converging drum wheel, the lower end face of the body is a step face with the left side higher than the right side, and an inverted-L-shaped step opening in the lower end face of the body and a tangent line at the corresponding position of the converging drum wheel form a triangular buffer area used for preventing equipment from being damaged after tobacco clamping. A connecting hole located below the negative pressure connecting pipe is formed in the outer side wall of the body in a penetrating mode, a tongue plate on a ZJ17 cigarette making and plug assembling machine wallboard is inserted into a square hole in the side wall of the body, and a long shaft of the ZJ17 cigarette making and plug assembling machine is sleeved and locked with the connecting hole. By optimizing the tobacco powder and rubber powder removing structure, reliable positioning of the body in the axial direction and the circumferential direction is achieved, vibration or movement of the body in the axial direction and the circumferential direction in the using process is avoided, the defect that a traditional installation structure is poor in stability and prone to failures is overcome, popularization and application of the tobacco powder and rubber powder removing structure on the ZJ118 type are achieved, and the tobacco powder and rubber powder removing structure is suitable for the ZJ118 type. The failure rate in the using process is reduced, and stability and reliability are high.

The utility model discloses a kind of range hood, including shell, exhaust device and oil cup;Shell has suction panel and the smoke collection cavity located in the inboard of suction panel, and suction panel has smoke collection cavity, first air inlet is equipped in smoke collection cavity, and first air inlet is communicated with smoke collection cavity;Exhaust device suction oil fume through first air inlet, and exhaust oil fume from smoke collection cavity;Oil cup is connected on shell, for receiving the oil liquid discharged by smoke collection cavity.This utility model's range hood, open smoke collection cavity on suction panel, first air inlet is arranged in smoke collection cavity, and oil fume towards suction panel will first enter smoke collection cavity, then flow into first air inlet, smoke collection cavity can play the effect of flow collection to oil fume, prevent oil fume from easily escaping from the area near first air inlet, to increase the residence time of oil fume near first air inlet, so that oil fume can be more fully sucked into first air inlet, to improve the suction effect of range hood to oil fume.

The invention belongs to the technical field of household appliances, and discloses a middle island type range hood. The island type range hood comprises a main box mechanism, an exhaust fume collecting hood and a lifting mechanism, the exhaust fume collecting hood is located below the main box mechanism and communicated with the main box mechanism, the lifting mechanism is connected with the main box mechanism and the exhaust fume collecting hood, and the lifting mechanism is used for driving the exhaust fume collecting hood to ascend and descend; the exhaust fume collecting hood comprises a hood body, a turning plate driving assembly and two turning plates, and a fume inlet is formed in the bottom surface of the hood body; the two opposite sides, in the first horizontal direction, of the cover body are rotationally connected with the turning plates. The turning plate driving assembly is connected with the turning plate, and the turning plate driving assembly is used for driving the turning plate to rotate, so that the turning plate can be switched between a first position for shielding the smoke inlet and a second position for turning towards the outer side of the cover body to open the smoke inlet. According to the island type range hood, a smoke gathering area can be defined by arranging the turning plates, oil smoke escape is reduced, and the smoke exhaust effect is improved.

The utility model discloses a surface cleaning device capable of lying flat for cleaning, which belongs to the technical field of cleaning equipment and comprises a machine body, a ground brush and a liquid supply component, the machine body is provided with a fan and a sewage bucket, the ground brush is provided with a sewage suction port, the sewage bucket is provided with a sewage inlet pipe, the sewage bucket has an inclined state and a lying flat state along with the machine body, and the machine body is flat and comprises a front shell and a rear shell. A first mounting cavity with an opening in the front side is formed in the lower portion of the front shell, the sewage bucket is arranged at the first mounting cavity, the sewage inlet pipe is arranged close to the front wall of the sewage bucket, the front wall of the sewage bucket is flush with the front surface of the front shell and forms part of the front surface of the machine body, and the front surface of the machine body is not higher than the upper surface of the floor brush when the machine body is in a flat state. The matching relation between the sewage pail and the machine body is reasonably set, so that the front surface of the machine body is kept flat when the sewage pail is installed, the front surface of the sewage pail is prevented from protruding out of the front surface of the machine body, and the flat machine body can drive the floor brush to smoothly enter a low space for effective cleaning when being in a flat state.

The utility model discloses a composite wallboard production and processing device relates to composite wallboard production and processing technical field. The device includes the organism, and one side of organism is provided with cutting knife, and the outer surface of cutting knife is provided with the protective housing, and the inside of protective housing is provided with adjustable unit, and the sliding block sliding connection in adjustable unit is in the inside of connecting block, and the bottom of sliding block is with composite board material and is resisted, and suction member sets up on connecting block. The device is through setting adjustable unit, and the sliding block can be automatically adjusted position according to the thickness of composite board material, and fills the gap between composite board material and cutting knife, so that suction member and cutting area can form relatively sealed space, effectively avoid dust from the crack and escape, improve the suction effect of the dust produced in the cutting process, improve the production environment, and guarantee the health of the operator.

The utility model discloses a range hood which comprises a range hood body, the range hood body is provided with a top plate, the top plate is arranged in the front-back direction, and the top plate is provided with a first exhaust inlet, a second exhaust inlet and a third exhaust inlet. The first exhaust inlet, the second exhaust inlet and the third exhaust inlet are all communicated with a smoke collecting cavity of the range hood main body; when the range hood works, the first exhaust inlet, the second exhaust inlet, the third exhaust inlet and the fourth exhaust inlet can generate negative pressure, and the first exhaust inlet, the second exhaust inlet and the third exhaust inlet are closer to a kitchen range, so that oil smoke flowing through the range hood main body can be fully sucked into the smoke collecting cavity, oil smoke escape is reduced, and the service life of the range hood is prolonged. The oil smoke suction effect of the range hood is improved, and the user experience is improved.

The invention discloses a cigarette holder. The cigarette holder comprises a cigarette holder body of a tubular structure. The tail end of the cigarette holder body is provided with a connecting part which can be detachably and fixedly connected with a bent pipe; smoking holes are formed in the circumferential face of the smoking nozzle body, and a high-temperature-resistant transparent glass blocking cover is arranged above the smoking holes. The novel cigarette holder body is installed at the front end of the gun barrel, the novel cigarette holder body and the high-temperature-resistant transparent glass blocking cover are installed above the cigarette smoking hole and connected into a whole through high-temperature-resistant glue to form a cigarette smoking opening with a focusing cigarette smoking area, the transparent glass cover extends to prevent air except smoke from entering the cigarette holder, and the smoke smoking effect is enhanced. The smoke suction effect is further improved through the variable cross-section channel.

The utility model discloses an on-line automatic sampling and cleaning system, which comprises a cleaning pipeline and a sampling pipeline, the cleaning pipeline sequentially comprises an NO3 interface communicated with deionized water for cleaning, a cut-off ball valve I and a pneumatic valve; the sampling pipeline sequentially comprises a filter, a one-way valve, a cut-off ball valve II, a pneumatic pump, a damper and a flow meter which are arranged in the sample pool, and the flow meter is connected with an analyzer through an N02 interface; the sample pool is provided with a liquid level transmitter used for monitoring the liquid level, a sample is communicated with the filter through an N01 connector, and an outlet of the pneumatic valve is also communicated with an inlet of the one-way valve. The utility model provides the online automatic sampling and cleaning device which is stable and reliable in effect and realizes online automatic sampling and cleaning.

The invention provides a design method, system, equipment and medium for a suction device of a static jet pipe, and the method comprises the step that the suction device comprising a suction seam, a suction cavity and a suction pipeline is formed by a contraction section and a throat of the jet pipe, and comprises the following steps that the suction seam is formed in the tail of the contraction section of the jet pipe; determining the starting point position of the suction seam according to the throat size; the width of the suction seam is determined according to the starting point position of the suction seam, the axis height of the spray pipe and the suction flow; the size of the suction cavity and the diameter of the suction pipeline are determined according to the size of the throat and the suction flow, so that the problem that new disturbance is introduced into the suction device due to the fact that new redeveloped boundary layer flow is formed at the suction lip is solved.

The invention relates to the technical field of charging piles, and discloses a mute device for a charging device, a mute charging device and an installation method.The mute charging device comprises the charging pile, a first access door is arranged on the left side of the charging pile, a second access door is arranged on the right side of the charging pile, and an air inlet silencing structure is arranged on the left side of the first access door; an air outlet noise reduction structure is arranged on the right side of the second access door. Noise is reduced by arranging the air inlet noise reduction structure and the air outlet noise reduction structure, and under the condition that the original structure and the heat dissipation effect of the charging pile are not changed, silent charging is achieved through the reasonably-arranged miniaturized and light silent equipment through the structure of the access door of the charging pile, and meanwhile the use experience of a user is improved.

The utility model discloses a half bridge type scrape suction mud machine equipped with centrifugal blower, this scrape suction mud machine includes the center support, and the center support top is provided with the bridge frame of horizontal, and the bridge frame end is provided with the drive mechanism, and sets up the rest grid strip combination under the bridge frame, and is provided with a plurality of suction mechanism on the rest grid strip combination, and a plurality of suction mechanism are arranged along the length direction of bridge frame and are connected on the mud discharge pipe, and the mud discharge pipe is connected with the suction device, and the scrape suction mud machine still includes centrifugal blower, and centrifugal blower sends high pressure gas into the suction port place of each suction mechanism through the air pipe, and the bottom of suction mechanism is provided with the inclined bracket plate, and the bracket plate pushes the sludge to the center support direction movement, and the suction port place of the sludge of closer center support, and the more compressed air of inhaled, and the high pressure air is inhaled through centrifugal blower at the suction port of scrape suction mud machine, makes it spouts the sludge, improves the mud water separation effect, and is convenient for scrape suction mud machine suction.

The utility model discloses a double-cold-source independent heat supply heat supply network condenser. The independent heat supply network condenser is simple in structure, high in adaptability and capable of giving consideration to double cold sources at the same time. The device comprises a shell lower part, a shell upper part, a steam inlet, a cold source I first front water chamber, a cold source I water chamber connecting pipe, a cold source I turn-back water chamber, a cold source II front water chamber, a cold source II turn-back water chamber, a cold source II water chamber connecting pipe, a cold source I water inlet pipe bundle, a cold source II pipe bundle, a cold source I air extraction opening, a cold source II air extraction opening, a cold source I second front water chamber and a cold source I water outlet pipe bundle. According to the shell shared by the double cold sources, different water chamber structures are configured through different cold sources, and the function of independent heating of the double cold sources can be achieved. The double cold sources are respectively provided with tube bundles, so that the tube bundle structural style can be conveniently matched with the heat exchange load. The double cold sources are respectively provided with an air suction opening, so that the suction capacity of non-condensable gas and the operability of the heat exchange effect are improved; the device is simple in structure, high in adaptability, low in material consumption, convenient to machine, manufacture and install and beneficial to popularization.

This application discloses a control method for a surface cleaning device. The surface cleaning device includes a floor brush with cleaning components and a suction system for removing dirt. The floor brush includes a housing, on which are a movable front scraper located in front of the cleaning components and a floor scraper located behind the cleaning components and in contact with the ground. When the floor brush moves forward, the front scraper moves upward away from the ground; when the floor brush moves backward, the front scraper moves downward and in contact with the ground. The method includes reducing the operating power of the suction system when the floor brush moves backward. In this application, when the floor brush moves backward, the front scraper contacts the ground, and together with the floor scraper in contact with the ground, the brush chamber and the ground form a relatively sealed space. Under the action of the front scraper, the floor scraper, and the suction airflow of the suction system, the resistance of the floor brush to the ground increases. At this time, reducing the operating power of the suction system can ensure the dirt removal effect of the surface cleaning device and reduce the operating resistance of the floor brush to the ground, thus ensuring the cleaning effect.