620results about How to "Improve suction efficiency" patented technology

A vacuum cleaner having an elongated support body, a nozzle attached to a lower end of the elongated support body by an articulated joint, a motor, a fan unit, a debris container, and an air passage that extends from the nozzle device, past the articulated joint by a flexible hose and to an air passage in the support body. The flexible hose is formed with a generally rectangular cross section.

The invention relates to a hydraulic bidirectional pumping device which comprises a prime motor, a hydraulic oil pump, a hydraulic oil tank, a control valve, a double-action hydraulic cylinder and plunger pumps. The prime motor drives the hydraulic oil pump. The hydraulic bidirectional pumping device utilizes the double-action hydraulic cylinder to drive the plunger pumps on both sides; the cylinder number is increased; stroke times are reduced; the service lives of easily damaged parts are prolonged; the coverage range of flow is effectively enlarged; suction efficiency of fracturing fluid is effectively improved; complexity of the integral structure is reduced; cost of manufacturing, maintenance and the like is reduced; the requirements on a lubricating system are lowered; the double-action hydraulic cylinder reciprocates to do work, so that working efficiency is improved.

The invention relates to a hydraulic bidirectional pumping device which comprises a prime motor, a hydraulic oil pump, a hydraulic oil tank, a control valve, a double-action hydraulic cylinder and plunger pumps. The prime motor drives the hydraulic oil pump. The hydraulic bidirectional pumping device utilizes the double-action hydraulic cylinder to drive the plunger pumps on both sides; the cylinder number is increased; stroke times are reduced; the service lives of easily damaged parts are prolonged; the coverage range of flow is effectively enlarged; suction efficiency of fracturing fluid is effectively improved; complexity of the integral structure is reduced; cost of manufacturing, maintenance and the like is reduced; the requirements on a lubricating system are lowered; the double-action hydraulic cylinder reciprocates to do work, so that working efficiency is improved.

A dust receptacle comprises a receptacle body having an air inlet and an air outlet, and detachably mounted in a dust collecting chamber of a robot cleaner, a cover fit in the receptacle body to open and close the air outlet, and a dust outlet formed in the receptacle body. Accordingly, the dust collected in the robot cleaner can be thoroughly and conveniently removed.

The multiple cyclonic dust collector includes one primary cyclonic dust collecting device with first air inflow unit, the first main body to separate out foreign matters from the inflow air, one dust collecting tub set in the side bottom of the first main body to collect the foreign matters the first main body separates out, one extending unit extending from the bottom of the first main body and set inside the dust collecting tub, and the first air outflow unit for air to flow out of the first main body; and one secondary cyclonic dust collecting device installed outside the primary cyclonic dust collecting device to suck air from the primary cyclonic dust collecting device for secondary dust collection.

Disclosed is a cyclone separating apparatus, and a vacuum cleaner having the same. The cyclone separating apparatus includes a first cyclone separating dust from dust-ladened air. A plurality of second cyclones centrifugally separate fine dust particles from air which is first separated at the first cyclone. A dust collecting unit detachably connects to the first and the second cyclones. The dust collecting unit separately collects large dust particles separated at the first cyclone, and fine dust particles separated at the second cyclone. Accordingly, a more compact cyclone separating apparatus can be realized with improved suction efficiency and dust collecting efficiency.

A robot cleaner to perform cleaning without interruption of travel when passing over an obstacle. The robot cleaner includes a main body, and drive devices at left and right sides of the main body. Each drive device includes a main wheel to drive the main body, a drive motor to rotate the main wheel, a gear assembly to transmit power from the drive motor to the main wheel, a drive shaft to assist the main wheel in rotating by rotation power, and an auxiliary wheel connected to a distal end of the drive shaft so as to be located closer to the center of the main body than the main wheel. If the main wheel is lifted from a floor when passing over an obstacle during traveling, the auxiliary wheel protrudes downward to reach the floor, assisting the main body in traveling to escape from the obstacle.

A robot cleaner to perform cleaning without interruption of travel when passing over an obstacle. The robot cleaner includes a main body, and drive devices at left and right sides of the main body. Each drive device includes a main wheel to drive the main body, a drive motor to rotate the main wheel, a gear assembly to transmit power from the drive motor to the main wheel, a drive shaft to assist the main wheel in rotating by rotation power, and an auxiliary wheel connected to a distal end of the drive shaft so as to be located closer to the center of the main body than the main wheel. If the main wheel is lifted from a floor when passing over an obstacle during traveling, the auxiliary wheel protrudes downward to reach the floor, assisting the main body in traveling to escape from the obstacle.

A breast pump can include a breast pump main body having a milking portion and negative pressure generating structure for generating negative pressure. A storing structure can be provided for storing expressed milk, and an opening / closing structure can be disposed between the breast pump main body and the storing structure for temporarily halting or permitting passage of the expressed milk into the storing structure. The milking portion can include a shape maintaining portion and a negative pressure generating portion that serves as a part of the negative pressure generating structure and can be attached to and detached from an inner side of the shape maintaining portion. At least one end of the negative pressure generating portion on an enlarged diameter side can include a flexible diaphragm portion and a pressing portion formed when a folded-back portion of the diaphragm portion passes an imaginary line of extension of a contact portion contacting the breast to press the breast, while the other end of the negative pressure generating portion is connected to the opening / closing structure.

A cyclone dust separator for a vacuum cleaner, where a couple of cyclones are disposed parallel with each other and sequentially operated to separate and collect dust. The cyclone dust separator includes a bypass path guiding dust-laden air drawn in through a suction opening directly to a motor and having a first mesh that filters off dust included in drawn-in air; a first cyclone disposed at one side of the bypass path to separate the dust from the dust-laden air drawn in through the suction opening and discharge cleaned air to the motor; and a second cyclone disposed parallel with the first cyclone to separate the dust from the dust-laden air drawn in through the suction opening and discharge cleaned air to the motor. The dust included in the air is separated sequentially by the first mesh, the first cyclone and the second cyclone.

A system for controlling fuel injection in an engine. The engine includes an intake passage, an intake passage injector, a cylinder having a combustion chamber, and a cylinder injector for injecting a target amount of fuel into the combustion chamber. The system includes a controller for controlling the intake passage and cylinder injectors to permit fuel injection, each with an injection ratio, while said engine operates in a condition in which said engine permits fuel injection from said cylinder injector, a sensor for sensing the amount of fuel injected from the cylinder injector, a detector for detecting the difference between the target injection amount and the amount of fuel injected and an adjuster for adjusting the injection ratio based on the result of the detection by the detector so that the intake passage injector performs fuel injection together with the fuel injection performed by the cylinder injector.

The invention mainly discloses a lake silt clearing device and method. According to the technical scheme, the lake silt clearing device comprises a boat body, a detection device, a grabbing device and a silt sucking device; the detection device comprises a detector, an ascending and descending rope and a winching device, and the detector is wound on the winching device through the ascending and descending rope; the grabbing device comprises an ascending and descending rod, a first grab bucket and a second grab bucket, the ascending and descending rod is connected with the first grab bucket, and the second grab bucket is located inside the first grab bucket; and the silt sucking device comprises a silt collection bin, a centrifugal type silt pump, a silt sucking pipe, a drill and a support frame, the silt sucking pipe is connected with the silt collection bin through the centrifugal type silt pump, the support frame is fixed to the outer side of the lower end of the silt sucking pipe, and the silt sucking pipe is internally provided with an enclosed motor connected with the drill. By means of the lake silt clearing device and method, the mode that grabbing and silt sucking are combined is adopted for disposing silt at the bottom of a lake; different types of disposal can be conducted according to the practical conditions of soil at the bottom of water; damage and blockage of the clearing device caused by hard objects are avoided; and the lake silt clearing device is high in clearing efficiency and long in service life.

The invention discloses a novel interstage air supplementing device of a multi-stage compression centrifugal type refrigeration compressor. The air supplementing device is characterized in that a second-stage exhaust volute (19) is arranged in a casing (1); a first-stage suction guiding ring (11), a first-stage impeller (5), a second-stage impeller (10) and an impeller distance ring (8) are arranged on a transmission shaft (9); a second-stage suction passage (15) is arranged in an interstage baffle (3); a first-stage exhaust passage (14) is formed between a first-stage diffuser (2) and the interstage baffle (3) in the casing (1); a second-stage exhaust passage (17) is formed between the interstage baffle (3) and the second-stage impeller (10); the casing (1), the first-stage diffuser (2) and the interstage baffle (3) commonly form an air supplementing and supplying passage (20); a straight slot section (18) is formed between the first-stage diffuser (2) and the interstage baffle (3); and an inter-stage sealing ring (7), a first-stage wheel cover sealing (4) and a second-stage wheel cover sealing (6) are arranged. By the device, the interstage air can uniformly enter a reflux apparatus of the compressor; the efficiency of the compressor is improved; and the airflow noise of the compressor is reduced.

A respirator includes an external shell assembly, an internal shell assembly mounted inside the external shell assembly and communicating with outside of the external shell assembly through an intake passage, and a sound-absorbing member mounted inside the internal shell assembly and defining a channel therein. An air blower can be mounted inside the internal shell assembly for sucking the oxygen or air inputted externally into the internal shell assembly along the channel and then outputting it further to where it is required. The acoustic absorption of the sound-absorbing member and the covering of the internal and external shell assemblies can effectively lower the noise of the respirator, and the internal shell assembly can further focus the gas to enhance the efficiency of suction of the gas of the air blower and to reduce the heat generated by the air blower.

A vacuum cleaner includes a main body having an electric blower for generating a suction air flow, a dirt collecting case for centrifugally separating and collecting dirt, and a compression assembly for compressing dirt collected in the dirt collecting case to reduce a volume thereof. The dirt collecting case has a separation chamber for centrifugally separating dirt from the dirt containing air and a dirt collecting chamber in communication with the separation chamber for accumulating the dirt separated by the separation chamber. The compression assembly has a first air intake member provided in the separation chamber and communicating with the electric blower, a second air intake member provided in the dirt collecting chamber and communicating with the electric blower, a shielding plate for selectively opening the first and the second air intake member and an actuator for driving the shielding plate.

The invention discloses a water medium filtering and dust removing bubble wet dust collector, which comprises a tank body (1), a water tank (2) arranged under the tank body (1), an ejector positioned over the tank body, a drain pipe (10) positioned below the water tank, a door (11) arranged at the side of the tank body, a filter plate (8) in the tank body, a pumping elbow (4) fixed on the water tank, a bell mouth (41) at the outlet end thereof, a layer of perforated metal sheet (5) arranged close to the working water surface and supported by a bar bearer (12) in the tank body. The bell mouth (41) enters into the water through the perforated metal sheet (5); the middle most of the lower part of the bell mouth (41) is provided with a pyramidal guide wind bucket (6) which is suspended at the inner side of the bell mouth (41) through a duct regulating thread slipping (7), thereby ensuring the outer side of the guide wind bucket (6) and the inner side of the bell mouth form an annular exhaust passage (42), size of which can be adjusted. The invention has simple structure and generates bubble through the guide wind bucket, thereby ensuring the pumped dust gas can fully enter into the water to be filtered and saving energy.

The invention provides a coal suction vehicle set for a railway tunnel ballast bed, which comprises a coal suction vehicle containing a coal suction vehicle frame, wherein the coal suction vehicle frame is connected with a middle working device; the middle working device is a ballast bed coal suction working device comprising a coal suction cover body mounted on a working trolley; a cover body structure connected with an adjusting mechanism as well as a working mechanism are arranged in the coal suction cover body; a sealing plate is also connected with the outer side of the coal suction cover body; the working mechanism comprises rolling brushes; the adjusting mechanism comprises a rolling brush mounting plate of which the upper side is connected with an off-running cylinder; the sealing plate is connected with an air suction pipe; the coal suction cover body is also connected with an air blowing pipe; the adjusting mechanism is connected to the cover body structure through a guide slot connected with an adjusting upper plate; the rolling brush mounting plate is arranged on the adjusting upper plate; the adjusting upper plate is connected with a connection adjusting plate through a spring; an adjusting frame lower plate is connected below the adjusting plate; and the cover body structure is also connected with support wheels capable of supporting the whole cover body structure on a sleeper when the cover body structure passes through the sleeper. The coal suction vehicle set avoids the blockage of a filter bag when coal ash in the airflow of a dust remover is serious.

An airflow diverter for an upright-type vacuum cleaner and an upright-type vacuum cleaner equipped with the same, are disclosed. The airflow diverter includes an inlet port formed on a cleaner body within which the vacuum generation device is received, air being drawn into the inlet port by the suction force generated by the vacuum generation, and a housing installed in the inlet port. The housing includes a first opening in communication with the vacuum generation device, a second opening in communication with the floor suction brush, and a third opening in communication with the auxiliary suction brush. A rotary knob is installed within the housing wherein if the rotary knob is turned to one direction by a predetermined angle, the rotary knob closes the third opening so that the vacuum generation device communicates with the floor suction brush, and if the rotary knob is turned to the other direction by a predetermined angle, the rotary knob closes the second opening so that the vacuum generation device communicates with the auxiliary suction brush.

The invention discloses a dust collector, a motor, as well as a control method and a control device of the motor. The control method comprises the following steps: carrying out constant-power control on the motor; in the process of carrying out constant-power control on the motor, acquiring the current rotating speed of the motor and direct-current bus current of the motor; acquiring compensation amount of the direct-current bus current according to the current rotating speed of the motor; and according to the compensation amount, the direct-current bus current and a given value of the direct-current bus current when the motor operates at constant power, carrying out torque compensation control on the motor. With the method, the suction efficiency of the dust collector during hole-plugged operation can be effectively improved under the condition that the hardware cost is not increased.

It is an object to provide a spindle device of a machine tool which has a simple structure and is capable of having high suction efficiency of cutting chips. A draw bar bringing engaging claws into engagement with a tool holder or releasing the engagement includes an engagement drive part moving the engaging claws to an engagement position with the tool holder; and a draw bar main body connected to the engagement drive part, and the engagement drive part is inserted into the draw bar main body to be detachably connected to an inner surface of the draw bar main body.

A suction apparatus of a multi-cylinder internal combustion engine has a suction manifold disposed in a direction parallel with a row of cylinders at one side of a cylinder head. The suction apparatus includes a plurality of independent suction passages of equal length each extending from an engine main body at right angle, a suction gathering chamber connected to the suction passages and disposed in the direction parallel with the row of cylinders, a throttle body provided at an upper stream end of the suction gathering chamber, and a resonance vessel communicating with the suction gathering chamber. The resonance vessel is supported by a cylinder head cover and a wall of the gathering chamber elastically through rubber members covering above of the independent suction passages with a space, and communicates with an upper part of the suction gathering chamber at a just downstream position of the throttle body. The space has a volume capable of receiving at least fuel injection valves and fuel supply pipes for respective cylinders of the internal combustion engine.

A method for conveying material by applying a pressure difference in a conveying conduit (4), in which method the material is fed into the conveying conduit (4) and in the conveying conduit further into a separating device (5), where the material being conveyed is separated from conveying air, in which method a negative pressure is created in the conveying conduit (4) by means of an ejector apparatus (6), whose suction side is connected to the separating device (5), said ejector apparatus being operated using an operating medium consisting of a liquid mist, especially an aqueous liquid mist, said medium being sprayed through at least one spraying nozzle (122) into an ejector tube (128) directed into a separating element (38). In the method, the generation of the negative pressure to be produced is intensified according to need by limiting the flow of gases, such as air, into the ejector tube (128) from the direction opposite to the spraying direction of its operating medium, i.e. from the outlet end (129) of the ejector tube. The invention also relates to an apparatus and an ejector device.

The invention relates to a kind of cyclone separator and a vacuum cleaner with this mentioned cyclone separator. The cyclone separator contains: a first cyclone for separating dust from the air that contains dust; many second cyclones, which can separate the fine dust particle with centrifugal separation in the air separated from the first cyclone; dust collection unit, which detachably connects to the first and the second cyclones. The dust collection units mentioned above are gathered in the large dust particles separated in the first cyclone and in the fine dust particles separated in the second cyclones respectively. As a result, the invention can realize the compact cyclone separator, and has advanced efficiency of suction and dust collection.

The invention discloses a rotary vane compressor and relates to a rotary vane compressor for a vehicle air conditioner, in particular to a rotary vane compressor for an air conditioner on a sedan car, an SUV, a mini bus and a light / heavy truck. The compressor comprises a cylinder body, a rotor, vanes, a front end cover and a back end cover, wherein symmetrical working cavities are formed by the center line of the cylinder body and the contour in the cylinder body; and on any cross section of each working cavity, a first circular arc section contour, a first vane extension section contour, a second circular arc section contour, a first vane constriction section contour, a third circular arc section contour, a fourth circular arc section contour, a second vane extension section contour, a fifth circular arc section contour, a second vane constriction section contour and a sixth circular arc section contour are sequentially distributed along the contour of a rotor angle of 0-360 degrees in the counterclockwise direction, and the tail end of each section contour form smooth connection with the head end of the adjacent contour. The compressor increases the displacement, improves the compression efficiency and the volume efficiency, ensures that the moving speed and acceleration of the vanes are not subject to sudden change, realizes that the vanes do not impact the cylinder body and simultaneously improves the sealability between the cylinder body and the rotor.

The invention provides a high-speed catamaran which comprises two sheet bodies arranged in parallel and a main cabin connected onto the tops of the sheet bodies. The high-speed catamaran further comprises two bulbnoses, an air suction device and a plurality of micro-bubble generating devices, wherein the two bulbnoses are connected to the bottom of the main cabin through struts and are vertically arranged on a bow and a stern of the catamaran, the air suction device is mounted on the top of the main cabin and is communicated with air pipes arranged inside the high-speed catamaran in a built-in mode, and the plurality of micro-bubble generating devices are arranged on the surfaces of the bulbnoses and the sheet bodies and is communicated with the air pipes. Hydrofoils are symmetrically arranged on both sides of each of the bulbnoses. The seakeeping performance of the catamaran is enhanced by arranging the bulbnoses with the hydrofoils on the bow and the stern to reduce wave-making resistance. The micro-bubble generating devices arranged at the bottom of the catamaran can generate thin bubble films at the bottom of the catamaran to reduce the frictional resistance of the catamaran. The air suction device arranged on the top of the cabin and air suction rotors can further improve the air suction efficiency of the air suction device, enhance the resistance reduction effect of the micro-bubble generating devices, and greatly reduce the energy consumption for generating micro bubbles.

The invention relates to a method for discharging and purifying smokes and a device thereof. The device consists of one or more than one rotational flow separation tube, a fan, an inner drum, an outer drum, a clapboard, a smoke cover, a rolling curtain and an oil collection cup, wherein, the rotational flow separation tube is provided with two or more than two symmetric inlets which are vertically arranged inside the inner round drum. The clapboard, the outer wall of the rotational flow separation tube and the inner drum form a smoke annular spout absorption channel. The fan is arranged on the top of the rotational flow separation tube. An inlet of the fan is connected with an air outlet of the rotational flow separation tube. The lower part of the rotational flow separation tube extends the smoke cover to the lower part of the smoke cover. An oil outlet positioned at the bottom of the rotational flow separation tube is sleeved with the oil collection cup. The invention has the advantages that the invention is designed based on the air dynamics, so that the smoke flows smoothly, with small resistance and high absorbing and purifying efficiency; and the invention adopts a method of medium free separation, thereby ensuring permanent smooth and continuously ensuring the high operation efficiency of a smoke extractor.

The invention discloses an environment-friendly dust-removal device used in an electromechanical engineering workshop. The environment-friendly dust-removal device comprises a bottom plate, a rotary shaft is rotationally inserted into the top of the bottom plate, a first sleeve is fixedly arranged on the top of the rotary shaft, a rotary device is installed on the outer portion of the first sleeve, and a stabilizing device is installed on the outer portion of the first sleeve. A through hole is formed in the lateral side of the first sleeve, a second motor is installed on the lateral side of the first sleeve, and an output shaft of the second motor is provided with a second gear which is located in the through hole in the first sleeve. A lifting rod is slidably sleeved with the first sleeve, the cross section of the lifting rod is rectangular, a second installation groove formed in the lateral side of the lifting rod in the length direction of the lifting rod, a rack is installed in the second installation groove, and the second gear in meshing transmission with the rack. The operation is very simple, the cleaning efficiency and convenience are improved, and the cleaning effect isgood.