Abstract: A dust collection base station, a dust cup for a dust collector, a cleaning device and a dust collection method belong to the field of cleaning devices. The dust collection base station includes a base station body and a cover opening structure, where an end of the base station body is provided with an accommodating groove; the cover opening structure is located on a side wall of the accommodating groove; and the cover opening structure is configured to trigger unlocking of a dust discharge cover of a dust cup when an air pressure in the accommodating groove is within a preset negative pressure range. During unlocking, since the air pressure in the accommodating groove is within the preset negative pressure range, the air pressure difference between the dust cup and the accommodating groove is within an acceptable range.

Abstract: A brush assembly, a liquid waste tank and a cleaning machine are provided. The brush assembly includes a housing, a liquid waste tank and a brush head. The housing includes an accommodating chamber with a main inlet. The liquid waste tank includes a first inlet in communication with the main inlet. A retaining element is also provided in the liquid waste tank to at least partially restrict the movement of liquid waste from the first inlet. The brush head is provided near the main inlet, and contacts a surface to be cleaned, so that the liquid waste on the surface enters the liquid waste tank through the main inlet and the first inlet.

Abstract: A steam cleaning apparatus may include a wand, a cleaning assembly coupled to the wand, the cleaning assembly including a steam generator, and a cleaning head pivotally coupled to the wand. The cleaning head may include a plurality of cleaning pads, a pad motor having a motor driveshaft, a drivetrain configured to transfer rotational motion of the motor driveshaft to each of the plurality of cleaning pads such that a rotation of the motor driveshaft causes a corresponding rotation in each of the plurality of cleaning pads, and a temperature sensor positioned proximate to the drivetrain, the temperature sensor being configured to measure a temperature of the drivetrain.

Abstract: A steam cleaning apparatus may include a wand, a cleaning assembly coupled to the wand, the cleaning assembly including a steam generator, and a cleaning head pivotally coupled to the wand. The cleaning head may include a plurality of cleaning pads, a pad motor having a motor driveshaft, a drivetrain configured to transfer rotational motion of the motor driveshaft to each of the plurality of cleaning pads such that a rotation of the motor driveshaft causes a corresponding rotation in each of the plurality of cleaning pads, and a temperature sensor positioned proximate to the drivetrain, the temperature sensor being configured to measure a temperature of the drivetrain.

Abstract: A magnesium powder pulverizing and grinding device is provided, relating to the technical field of magnesium powder pulverizing. The device includes a mounting frame, a storage barrel is fixedly mounted on the mounting frame, a filter plate is rotatably mounted on an inner side wall of the storage barrel, and a pulverizing mechanism is connected to the filter plate. The pulverizing mechanism is used to pulverize caked magnesium powder. A grinding mechanism is connected to the filter plate, and the grinding mechanism is used to grind the pulverized magnesium powder. A vibration mechanism is connected to the grinding mechanism, and the vibration mechanism is used to accelerate the falling of the pulverized magnesium powder. The effect of improving the use convenience of the magnesium powder pulverizing and grinding device is achieved.

Abstract: A refrigerator, including a box body having a rear shell, a compressor compartment disposed below the box body, and a rear cover plate covering the rear side of the compressor compartment, wherein the rear cover plate is adjacently disposed below the rear shell; the rear shell has a rear back plate and a fixing structure bending forwards from the lower end of the rear back plate; the rear cover plate has a cover plate main body and a butt-joint structure bending forwards from the top of the cover plate main body; and clamping mechanisms matching each other for spacing are disposed on the fixing structure and the butt-joint structure. According to the foregoing arrangement, it can be ensured that no vertical gap can be formed between the rear cover plate and the upper side of the rear back plate of the refrigerator.

Abstract: A dust-air separation device and vacuum cleaner comprises a housing with an air inlet channel, a cyclone separation chamber, and a dust collection chamber, the air inlet channel and the dust collection chamber are connected to the cyclone separation chamber, and an air outlet is formed on the housing; the inner peripheral wall of the cyclone separation chamber is provided with an air deflector extending along the flow direction of the airflow in the cyclone separation chamber. A first separator and the second separator are respectively located on opposite sides of the air deflector along the axial direction of the cyclone separation chamber, and the first separator and the second separator are both connected to the air outlet. The dust-air separation device reduces filter clogging and sudden drops in suction power such that the device has better vacuuming performance.

Abstract: A refrigerator, including a box body having a rear shell, a compressor compartment disposed below the box body, and a rear cover plate covering the rear side of the compressor compartment, wherein the rear cover plate is adjacently disposed below the rear shell; the rear shell has a rear back plate and a fixing structure bending forwards from the lower end of the rear back plate; the rear cover plate has a cover plate main body and a butt-joint structure bending forwards from the top of the cover plate main body; and clamping mechanisms matching each other for spacing are disposed on the fixing structure and the butt-joint structure. According to the foregoing arrangement, it can be ensured that no vertical gap can be formed between the rear cover plate and the upper side of the rear back plate of the refrigerator.

Abstract: A steam cleaning apparatus may include a wand, a cleaning assembly coupled to the wand, the cleaning assembly including a steam generator, and a cleaning head pivotally coupled to the wand. The cleaning head may include a plurality of cleaning pads, a pad motor having a motor driveshaft, a drivetrain configured to transfer rotational motion of the motor driveshaft to each of the plurality of cleaning pads such that a rotation of the motor driveshaft causes a corresponding rotation in each of the plurality of cleaning pads, and a temperature sensor positioned proximate to the drivetrain, the temperature sensor being configured to measure a temperature of the drivetrain.

Abstract: A data link layer device and a packet encapsulation method are provided. The data link layer device includes a first and a second first-in-first-out (FIFO) module. The first FIFO module receives and stores multiple first data from an upper-layer module, and removes data gaps from the first data to store the first data in a continuous form. When the first FIFO module is not empty, the first FIFO module generates data of different lengths based on the current amount of data stored temporarily in the first FIFO module and a preset data length. When the data queue of the second FIFO module has enough space to receive the first data, the first FIFO module transfers the first data to the second FIFO module, and the first FIFO module transfers a header including the data length to a header queue of the second FIFO module.

Abstract: A data link layer device and a packet encapsulation method are provided. The data link layer device includes a first and a second first-in-first-out (FIFO) module. The first FIFO module receives and stores multiple first data from an upper-layer module, and removes data gaps from the first data to store the first data in a continuous form. When the first FIFO module is not empty, the first FIFO module generates data of different lengths based on the current amount of data stored temporarily in the first FIFO module and a preset data length. When the data queue of the second FIFO module has enough space to receive the first data, the first FIFO module transfers the first data to the second FIFO module, and the first FIFO module transfers a header including the data length to a header queue of the second FIFO module.

Abstract: A ring bus and a credit allocation method are provided. The ring bus includes a slave module and multiple master modules. The slave module includes an injection table and a state table, and is configured to generate a credit signal including a node identity and an active code. The master modules are coupled to the slave module to form a ring path. The slave module determines whether the credit signal is a newly injected credit signal, and determines the node identity of the credit signal according to the injection table or the state table. The slave module transmits the credit signal to the master module corresponding to the node identity through the ring path according to the node identity. The slave module uses a corresponding idle entry to receive a credit request signal provided by the master device consuming a credit of the credit signal.

Abstract: A ring bus and a credit allocation method are provided. The ring bus includes a slave module and multiple master modules. The slave module includes an injection table and a state table, and is configured to generate a credit signal including a node identity and an active code. The master modules are coupled to the slave module to form a ring path. The slave module determines whether the credit signal is a newly injected credit signal, and determines the node identity of the credit signal according to the injection table or the state table. The slave module transmits the credit signal to the master module corresponding to the node identity through the ring path according to the node identity. The slave module uses a corresponding idle entry to receive a credit request signal provided by the master device consuming a credit of the credit signal.

Abstract: Hydroxyethyl (methyl)acrylate is prepared by a process of a combination of a three-stage tubular reactor and a tower reactor, wherein, firstly, a catalyst, a polymerization inhibitor and (methyl) acrylic acid are mixed until the solids are dissolved, then mixed with a part of ethylene oxide and thereafter enter into a first tubular reactor for a reaction, a reaction liquid flowing out from the first tubular reactor is mixed with a certain amount of ethylene oxide and enters into a second tubular reactor for a reaction, a reaction liquid flowing out from the second tubular reactor is then mixed with a certain amount of ethylene oxide and thereafter enters into a third tubular reactor, and a reaction liquid flowing out from the third tubular reactor is then passed through a stage of an adiabatic tower reactor and aged such that a product liquid is obtained from extraction.

Abstract: Hydroxyethyl (methyl)acrylate is prepared by a process of a combination of a three-stage tubular reactor and a tower reactor, wherein, firstly, a catalyst, a polymerization inhibitor and (methyl) acrylic acid are mixed until the solids are dissolved, then mixed with a part of ethylene oxide and thereafter enter into a first tubular reactor for a reaction, a reaction liquid flowing out from the first tubular reactor is mixed with a certain amount of ethylene oxide and enters into a second tubular reactor for a reaction, a reaction liquid flowing out from the second tubular reactor is then mixed with a certain amount of ethylene oxide and thereafter enters into a third tubular reactor, and a reaction liquid flowing out from the third tubular reactor is then passed through a stage of an adiabatic tower reactor and aged such that a product liquid is obtained from extraction.