326 results about "Pressure generation" patented technology

The invention discloses a dynamic target pressure generation method based on multi-source pressure characteristics and an energy efficiency curve, and belongs to the technical field of energy-saving control of industrial air compression systems. According to the method, the minimum value, the maximum value, the average value and the mode of tail end pressure are counted, the dynamic range of gas consumption requirements is accurately represented, and the dynamic target pressure is generated. The air compressor energy efficiency curve library is set, the optimal continuous pressure interval is screened instead of single-point optimization, the operation stability and the energy efficiency advantage are considered, finally, the target pressure of each air compressor is distributed through the multi-target optimization algorithm, energy consumption waste caused by pressure overlapping is avoided, and the energy efficiency of the air compressor is improved. The global energy efficiency is optimal, and the problems that due to frequent loading and unloading of the air compressors of an existing air compression station, energy consumption is wasted, the tail end air pressure requirement is lower than the air compressor set value, and the redundancy of the pressure set value is too high when the multiple air compressors operate in parallel are solved.

The invention discloses a pressure sensor zero drift compensation method and system for a high-voltage direct-current converter valve cooling system, and relates to the technical field of monitoring and calibration of high-voltage direct-current transmission equipment. The method comprises the following steps: constructing a multi-factor coupling drift model taking temperature, vibration frequency and electromagnetic interference intensity as inputs; environment parameters and pressure signals are collected in real time, and reference pressure signals are collected regularly; short-term dynamic compensation is realized based on model prediction and reference deviation correction; updating the model through incremental learning according to the drift trend; and real-time monitoring and abnormal early warning are carried out. The system comprises a multi-parameter acquisition unit, a data processing unit, a reference pressure generation unit and a communication unit. According to the method, shutdown calibration is not needed, the compensation precision is improved by 75% or above, the calibration period is prolonged to 12 months, meanwhile, the method has the abnormal diagnosis and standby compensation functions, measurement continuity is guaranteed, compatibility is high, industrial popularization is easy, and the method is particularly suitable for being used in a complex environment.

The invention discloses a movable adsorption machine for waste gas treatment, and belongs to the technical field of waste gas treatment.The movable adsorption machine comprises an outer box body and brake wheels installed at the bottom of the outer box body, a gas inlet pipe is installed at the upper end of the outer box body, a filter plate is arranged below the gas inlet pipe, and a communicating pipe is arranged at the lower end of the filter plate; adsorption columns are inserted into the communicating pipes, the communicating pipes are arranged at the upper ends and the lower ends of the adsorption columns, the communicating pipes at the lower ends of the adsorption columns are connected with negative pressure generation equipment through drainage pipes, an exhaust pipe is installed at the upper end of the negative pressure generation equipment, and a power cam is arranged between the adsorption columns. According to the mobile adsorption machine for waste gas treatment, the filter plate can be cleaned in a manner of electrostatic dust adsorption and reverse blowing, the phenomenon that mesh holes in the filter plate are partially blocked by adopting a brush plate is prevented, meanwhile, harmful substances in waste gas can be adsorbed by arranging activated carbon particles, and the adsorption treatment effect on the waste gas is improved.

The utility model discloses a double-gas-path gas source system and a double-gas-path heart auxiliary system. The double-air-path heart assisting system comprises a pressure generating mechanism which alternately generates positive pressure and negative pressure when working; the first auxiliary device comprises first driven equipment and a first piping pipeline, a pipe body at the farthest end of the first piping pipeline is provided with an inflow channel and an outflow channel, and the first driven equipment is located in the pipe body of the first piping pipeline and corresponds to the outflow channel in position; the second auxiliary device comprises second driven equipment and a second piping pipeline communicated with the second driven equipment; the pressure generating mechanism enables the second driven device to repeatedly expand and contract through the second piping. The detection device is used for acquiring the pressure in the cardiac chamber and the pressure in the aorta; and the control mechanism is used for controlling the pressure generation mechanism to respectively drive the first driven equipment and the second driven equipment according to the corresponding time sequence in a cycle control period according to the pressure signal sent by the detection device.

The invention is applicable to the field of advanced manufacturing of powder materials, and provides flash sintering equipment for high current and high pressure, which comprises a power supply module, a pressure generation module, a support frame, a high vacuum module, a jacking module, a sintering unit and a conveying module. The sintering unit is provided with a sintering platform, a floating die module and a floating lower punch module and is guided through an upper guide column and a lower guide column. The jacking module jacks the lower electrode through a lead screw to push the floating lower punch module and the floating die module to move upwards along a guide column to be separated from the platform, and floating butt joint is achieved; the pressure generation module drives the upper punch to press downwards through the upper electrode and applies pressure to the sample, and the power supply module applies sintering current at the same time. Through the design of the floating module in non-rigid connection, the pressing force is prevented from being transmitted to the sintering platform, the equipment is prevented from overturning, and the stability of the sintering process is improved; and the whole station switching of the sintering unit is realized in combination with the conveying module, so that the continuous automatic production capacity of the equipment is improved.

Braking system with: a hydraulic brake device for generating a friction braking force comprising a pedal (16), at least one brake caliper (21a - 21d) a main pressure generating device (200) with a main cylinder (212) and a piston (251) which pressurizes the main cylinder (212), a wheel pressure generating device (300) for generating a hydraulic pressure in the at least one brake caliper (21a - 21d); and a regenerative braking device (18) and a brake control device (100) for calculating a braking force distribution between friction brakes and regenerative braking, wherein the braking system is configured to adjust a total braking force (Ft) based on a pedal reaction force and a displacement amount of the piston (251) that pressurizes the master cylinder (212), or adjust the total braking force (Ft) based on the pedal reaction force and the generated hydraulic pressure in the at least one brake caliper (21a - 21d) to keep the total braking force (Ft) at a constant level when transitioning from regenerative braking to friction braking in response to a reduction in vehicle speed.

The invention relates to the technical field of industrial circulating water treatment, in particular to a negative pressure driven micro-nano bubble industrial circulating water descaling treatment system which comprises a water quality monitoring module, a negative pressure generation and control module, a micro-nano bubble generation module, an intelligent descaling execution module, a network communication module and a man-machine interaction and visualization module. According to the system, personalized and precise descaling management is realized through multi-source data fusion, water quality prediction, dynamic descaling demand analysis and global optimization strategy generation; and meanwhile, bubble diffusion and self-cleaning functions are integrated, the descaling efficiency and the operation stability are improved, and risk early warning and closed-loop optimization capabilities are achieved. The operation efficiency of the industrial equipment can be remarkably improved, the energy consumption is reduced, and the system reliability and management convenience are enhanced.

The utility model discloses a negative pressure suction device for taking a dislocated intraocular lens. The negative pressure suction device mainly comprises a suction catheter, a catheter seat, a butt joint seat, an extension tube, a negative pressure generation device and a negative pressure control device, wherein the combined structure of the suction catheter and the catheter seat can be realized by directly adopting a 22G venous indwelling needle catheter, the combined structure of the suction catheter and the catheter seat is connected to the extension tube through the butt joint seat, the combined structure of the negative pressure generation device and the negative pressure control device can be realized by directly adopting an ultrasonic emulsification and vitreous body cutting machine and a matched pedal controller, and the extension tube is in butt joint with a negative pressure port of the extension tube. The negative pressure is adjusted through the pedal controller, the intraocular lens dislocated to the vitreous cavity is attracted to the pupil area, and damage to the retina in an operation is avoided. The device has the advantages of simplicity and convenience in operation, controllable negative pressure, small trauma and the like, is suitable for minimally invasive extraction or reduction of a dislocated intraocular lens in clinic, and is wide in adaptability.

Examples refer to powder feeding systems including a powder feeder connectable to a laser metal deposition equipment, the powder feeder having a feeding hopper to store powder, a first powder outlet through which powder is feed to the laser metal deposition equipment and a first powder inlet, a refilling hopper to store additional powder that includes a second powder outlet connected to the first powder inlet through which the additional powder is provided to the feeding hopper and a pressure generation component to generate an operating pressure level inside the feeding hopper. The system also includes a controller that, during normal operation of the powder feeder and upon reception of a refilling signal, causes the generation of a pressure level inside the refilling hopper substantially equal to the operating pressure level and causes the passage of additional powder from the refilling hopper to the feeding hopper.

The present invention relates to a mechanical monitoring sensor for a segment, and an auxiliary mounting device thereof. The sensor comprises a pressure-bearing component and a sensor body. The pressure-bearing component is independent of the sensor body. An arch-shaped shell of the pressure-bearing component deforms under external pressure to extrude a pressure-bearing liquid inside to pass through a first liquid pipe and a second liquid pipe to enter the sensor body so as to push a sensing end of a piston to move. A sensing diaphragm on the sensing end of the piston is in contact with the pressure-bearing liquid, a fixed end of the piston is connected to a steel wire by means of a spring, and the piston converts the pressure received by the sensing diaphragm into a pulling force on the steel wire. The present invention has the advantages such as long service life and high reliability of monitoring data.

The invention provides a vascular occlusion suction system and laser ablation equipment, and belongs to the technical field of medical instruments.The suction system comprises a suction catheter, a collecting device, a negative pressure generating device, a flow sensing device and a control device.The first end of the suction catheter acts on the application position of a target object; an inlet of the collecting device is communicated with the second end of the suction catheter to form a first channel of the suction channel, the negative pressure generating device is communicated with an outlet of the collecting device to form a second channel of the suction channel, the flow sensing device is used for monitoring the real-time flow of the suction channel, and the control device is configured to respond to gear selection operation. The initial suction gear is determined, the negative pressure generation device is controlled to work at the initial suction gear, and the gear adjustment prompt instruction is output according to the real-time flow, so that an operator can conveniently carry out gear adjustment on the negative pressure generation device subsequently or directly carry out automatic gear adjustment on the negative pressure generation device; and the capacity of intelligently adjusting the suction negative pressure of the suction system is effectively improved.

The utility model relates to the technical field of medical instruments, and particularly discloses a negative pressure machine which comprises a water-gas separator and two negative pressure generation containers. Air inlets of the two negative pressure generation containers are connected with branch air inlet assemblies respectively, and the two branch air inlet assemblies are jointly connected with a main air inlet assembly. A pressure regulating assembly is arranged on the main path air inlet assembly; water inlets of the two negative pressure generation containers are connected with branch water inlet assemblies respectively, and the two branch water inlet assemblies are jointly connected with a main water inlet assembly; the negative pressure machine comprises two negative pressure generation containers, discharge ports of the two negative pressure generation containers are connected with branch discharge assemblies respectively, the two branch discharge assemblies are jointly connected with a main discharge assembly, and the main discharge assembly is connected with an inlet of a water-gas separator. And in addition, the pressure adjusting assembly is further arranged to adjust the air pressure, so that the stability of the air pressure is guaranteed, and high practicability is achieved.

The application is suitable for the field of advanced manufacturing of powder materials, and provides a flash sintering equipment for large current and large pressure, which comprises a power supply module, a pressure generation module, a support frame, a high vacuum module, a jacking module, a sintering unit and a conveying module. The sintering unit is provided with a sintering platform, a floating mold module and a floating lower punch module, and is guided by upper and lower guide columns; the jacking module jacks up the lower electrode through a lead screw, pushes the floating lower punch module and the floating mold module to move upwards along the guide column to separate from the platform, and realizes floating butt joint; the pressure generation module drives the upper punch to press downwards through the upper electrode and applies pressure to the sample, and the power supply module simultaneously applies sintering current. Through the design of the floating mold module connected in a non-rigid manner, the application avoids the transmission of the pressing force to the sintering platform, prevents the equipment from overturning, and improves the stability of the sintering process; and the combination of the conveying module realizes the overall station switching of the sintering unit, and improves the continuous automatic production capacity of the equipment.

A gate valve according to the present invention is configured to partition a flow path. The gate valve has a valve box, a valve body, a rotary shaft, a rotation drive unit, a pressing drive unit, a driving pressure generation mechanism, and an energy regeneration mechanism. The rotation drive unit is capable of rotationally driving the valve body. The pressing drive unit is provided in the valve box. The pressing drive unit moves the valve body, in a direction along the flow path, from a valve-opening covering position to a valve closing position at which the valve body contacts the peripheral edge portion, and presses the valve body. The driving pressure generation mechanism is connected to the pressing drive unit and is capable of causing the pressing drive unit to expand and contract. The energy regeneration mechanism regenerates drive energy for valve operation.

The invention discloses a double-layer optical waveguide coupling type pressure sensor, which comprises a detection optical signal generation module, a pressure sensing unit and a detection signal processing module, and is characterized in that the detection optical signal generation module and the detection signal processing module are connected with the pressure sensing unit through optical fibers; the pressure sensing unit mainly comprises two layers of flat plates containing optical waveguides, and air or low-loss transparent liquid with a certain thickness clamped between the flat plates to form a pressure sensing structure, when the upper-layer waveguide deforms due to external pressure, the distance between the upper-layer waveguide and the lower-layer waveguide and the coupling efficiency are changed, the output optical power of each optical waveguide is changed, and the output optical power of each optical waveguide is changed. Therefore, the pressure on the chip can be detected. According to the invention, high-precision sensing can be realized, and compared with a traditional electric pressure detection method, the method has the advantages of resisting electromagnetic interference, supporting sensing and transmission integration and high-speed dynamic sensing, and being suitable for dangerous occasions such as a complex electromagnetic environment and the like; compared with a wavelength resolution type optical pressure sensor, the optical pressure sensor has the advantages of wide spectrum, simple preparation process and high cost performance.

Described herein is a respiratory care apparatus capable of performing multitude of therapy for secretion management and breath assistance therapy. The respiratory care apparatus comprises an electromechanical air router assembly (EARA) and an interfacing assembly. The EARA includes independent first and second pressure generating sources for assisted inhalation / insufflation and assisted exhalation / exsufflation process. The interfacing assembly includes a patient interface port and a patient interface tube. The interfacing assembly forms two pneumatically separate paths. The respiratory care apparatus is configured to generate alternate positive and negative pressure at the patient interface port for assisted inhalation / insufflation and assisted exhalation / exsufflation processes respectively. The assisted inhalation / insufflation and assisted exhalation / exsufflation processes are carried out independently through separate conduits / passages to reduce contamination and infection. Further, the respiratory care apparatus comprises a garment which oscillates due to alternate positive and negative pressure generation and provides therapy to the patient.

The application provides a piling device, which comprises a water hammer bin, a pressure generating assembly and a gas generator replacing device, the pressure generating assembly comprises a pressure chamber, a gas guide structure and a gas generator, the gas guide structure is fixed to the side wall of the pressure chamber and communicates with the pressure chamber, the gas generator comprises a plurality of components for loading gas generating agent, the gas generator replacing device comprises a gas generating agent conveyor and a mechanical arm, wherein the gas generating agent conveyor is used for conveying the components loaded with the gas generating agent from one side close to the workboat end to one side close to the mechanical arm, and conveying the components in a second use state from one side close to the mechanical arm to one side close to the workboat end, and the mechanical arm is used for fixedly connecting the components in a first use state with the gas guide structure, and transferring the components in the second use state from the gas guide structure to the gas generating agent conveyor; the piling device provided by the application can realize automatic installation or dismounting of the gas generator.

A substrate processing device according to the present invention includes a holding unit having, on a suction surface for suctioning a substrate, a circular central region and an annular outer region arranged outside the central region. A plurality of zones are set on the suction surface, the plurality of zones being in the central region and in regions obtained by dividing the outer region in the circumferential direction. The substrate processing device includes a pressure generation unit which generates pressure in each of the plurality of zones. In a state in which the substrate is mounted on the suction surface and in which negative pressure is applied to at least one of the plurality of zones, the pressure generation unit applies positive pressure to at least one of the plurality of zones to which negative pressure is not applied.

The pipeline pressure blocking operation multi-degree-of-freedom hydraulic manipulator device and method of the present application belongs to the pipeline repair and pressure blocking technical field, comprising: setting pressure blocking execution device, wherein the pressure blocking execution device comprises a main feeding rod and a blocking head at the end of the main feeding rod, and an embedded fine adjustment mechanism is connected between the blocking head and the main feeding rod, and the scheme adopts the parallel connection configuration of high-strength flexible hinge and micro hydraulic cylinder; the high-strength flexible hinge has very high rigidity in the axial direction, can withstand the huge axial thrust generated by the medium pressure up to 25 MPa or above, and ensures that the blocking head is not pushed back; at the same time, by using the incompressibility of hydraulic oil, the system can still realize the fine adjustment of ± 3 degrees to ± 5 degrees of pitch and yaw while maintaining high pressure bearing capacity through the coordinated action of the hydraulic cylinder, solving the pain points of easy self-locking and difficult adjustment under high pressure.

The invention relates to a real-time intelligent pressure monitoring scar diagnosis and treatment device and system. The device comprises a pressure generation device, a rigid structure matched with the pressure generation device in shape and a flexible touch sensor located in the rigid structure. The inner layer of the flexible touch sensor is provided with a flexible conductive contact array, and the outer layer of the flexible touch sensor is provided with a flexible integrated electrode array. According to the device, the local pressure borne by the pathological scar is accurately measured at the micro-nano scale, adjustment can be carried out in real time according to the stress condition, treatment of the pathological scar is facilitated, pressure research on the pathological scar is also facilitated, the pathogenesis of the pathological scar is clarified, and the device has good application prospects.

Provided is a long arm supported in a cantilever manner with light weight and high rigidity. The rod 30 is formed from rods 31-33 so as to be a multi-stage telescopic configuration. The rods 32, 33 respectively have upright columns 42, 43 on the tips. The wire 11 is suspended between the tip of the rod 31 and the lead end of the arm via the top of the column 42. The wire 12 is suspended between the base of the column 42 and the lead end of the arm via the top of the column 42. The wire 22 is suspended between the top of the column 42 and the lead end of the arm via the top of the column 43. The tension generation means 50 pulls the wires 10, 20. The air pressure generation means 60 applies pressure to the inside of the rod 30.

The invention provides a high-pressure gas membrane rupture pressure measuring device and a measuring method thereof, and belongs to the technical field of pressure measurement. The measuring device comprises a pressure generation system, a gas compression system, a gas injection system, a pressure measuring system and a diaphragm clamping system. The piston divides the cavity into a hydraulic cavity and a gas compression cavity, and the piston is hydraulically driven to compress the pre-filled gas, so that the diaphragm is broken. The pressure measurement system records pressure-time data in real time, and a sliding window average algorithm is adopted to extract a membrane rupture pressure peak value. According to the technical scheme, inert gas is used, initiating explosive devices are not used, membrane rupture energy is only gas expansion, the protection box can absorb fragments, and explosion-proof transformation is not needed in a laboratory. And the smoothed unique membrane rupture pressure value is output through a sliding window averaging algorithm, and manual reading errors are eliminated. According to the technical scheme, the device is compact in structure, safe to operate, rapid in testing and suitable for accurately measuring the diaphragm rupture pressure of the gas gun diaphragm in a conventional laboratory.

The application belongs to the technical field of microfluidics, and particularly relates to a detection substrate and a preparation method thereof and a microfluidic chip. The detection substrate is used for a microfluidic chip. The microfluidic chip comprises a driving substrate arranged opposite to the detection substrate. The detection substrate is located below the driving substrate. The detection substrate comprises a substrate, a pressure transmission structure and a detection unit. The pressure transmission structure is arranged on the substrate. The detection unit is arranged between the substrate and the pressure transmission structure and is used for generating an electrical parameter change in response to external pressure. When a liquid drop is located between the driving substrate and the detection substrate, the gravity of the liquid drop is transmitted to the detection unit through the pressure transmission structure, so that the electrical parameter change of the detection unit is caused to determine the position of the liquid drop. The application can realize accurate detection of the position of the liquid drop by causing the electrical parameter change through the gravity of the liquid drop.

This application relates to a hydraulic brake cylinder pressure control system and its control method. The control system includes a pressure generation module and a pressure control module. The pressure generation module includes a check valve, an external accumulator, and an accumulator sensor. The check valve is connected to an oil tank. The pressure control module includes a proportional solenoid valve connected to the external accumulator and the brake cylinder; a pressure-holding solenoid valve located at the overflow port of the proportional solenoid valve, which is connected to the oil tank via the pressure-holding solenoid valve; a brake cylinder sensor collecting and outputting the brake cylinder pressure; and a brake cylinder pressure switch electrically connected to the brake cylinder sensor. During the relief condition, the proportional solenoid valve is de-energized and the pressure-holding solenoid valve is energized. During coasting or braking conditions, the proportional solenoid valve is energized, and the pressure-holding solenoid valve is de-energized after a delay. This application reduces the usage rate of the proportional solenoid valve and improves system reliability through the coordinated control of the proportional solenoid valve and the pressure-holding solenoid valve.

The invention provides a negative pressure sizing device and a negative pressure sizing method, and belongs to the technical field of calcium carbonate production. The negative pressure sizing device comprises a sizing pump, a slurry conveying channel, a negative pressure generation assembly, a switching valve and a control assembly; the lower end of the slurry conveying channel is communicated with the discharge end of the slurry feeding pump, and the upper end of the slurry conveying channel is communicated with the carbonization tower. The negative pressure generating assembly is communicated with the slurry conveying channel, and local negative pressure is formed in the slurry conveying channel by inputting and discharging media. The switching valve is arranged on the slurry conveying channel and used for switching the communication state of the slurry conveying channel and the carbonization tower or the negative pressure generation assembly. The control assembly comprises a monitor for monitoring the slurry level of the slurry conveying channel and a controller electrically connected with the switching valve and the slurry feeding pump. According to the negative pressure sizing device and the negative pressure sizing method, local negative pressure is formed in the sizing conveying channel through the negative pressure generating assembly, sizing is assisted through the negative pressure, the instantaneous load of the sizing pump is reduced, and the operation and maintenance cost is reduced.

The invention relates to a tool holder comprising a housing (2) which can be fixed on a carrier device of a machining tool. A shaft (5) is rotatably supported in the housing (2), which shaft has a tool receptacle (6) at a front end (5a) and a drive interface (9) at a rear end (5b), which can be driven by a drive transmission of the carrier device. The tool receptacle (6) has, at a contact area (11) against which a connection area (7a) of a tool (7) to be clamped can lie, a pressure chamber (12) which is concentrically formed with respect to the shaft axis and which can be filled with a pressure medium. The pressure chamber (12) is connected in the shaft (5) by a pressure medium connection (13) to a pressure generation device (14). The pressure generation device (14) is arranged in a front end region of the shaft (5). The tool holder (1) is simple in construction and is particularly suitable for clamping driven tools (7) which are rarely exchanged.

A pair of sliding members sliding relative to each other at sliding faces (S) is configured such that at least one of the sliding faces (S) includes a negative pressure generation mechanism (21) separated from a leakage side by a leakage-side land portion (R2) and a land portion (26) arranged in the negative pressure generation mechanism (21). In the compact sliding members, sliding torque can be reduced and a sealing function can be maintained.

The invention discloses a negative ion water mist excitation module and an excitation method thereof, and the module comprises an injection pipe which is provided with an injection channel and an injection port; an air pump device; a water supply device; the air pump device and the water supply device are connected to the injection pipe so as to supply injection gas and water to the injection pipe to generate water mist, and the excitation needle comprises a conductive needle body electrically connected to the high-pressure generation unit; and the needle body is arranged in the spraying channel so as to ionize the water mist through the needle tip end of the needle body to generate negative ion water mist and spray the negative ion water mist out of the spraying opening.

The invention provides an automatic analysis device and the like which do not remain air bubbles in the device. The automatic analysis device (1) is provided with a dispensing mechanism (100). This dispensing mechanism (100) is provided with: nozzles (sample dispensing nozzle (10), reagent dispensing nozzle (11), dispensing nozzle (102), dispensing nozzle (115)) that suck / discharge a liquid; a pressure generation mechanism (water supply pump (111)) that is connected to the nozzles and generates pressure for sucking / discharging the liquid; and a flow path (104) that measures the flow path including the nozzles and the pressure generation mechanism. A hydrophilic film (305) is formed on an inner surface (203a) of the pressure sensor unit (112), the hydrophilic film (305) containing a silicon compound and at least one of silica particles and alumina particles, and the hydrophilic film (305) is formed on the inner surface (203a) of the pressure sensor unit (112). The relationship between the arithmetic average roughness Ra0 of the base material (301) of the inner surface (203a) and the arithmetic average roughness Ra1 of the inner surface (203a) after the hydrophilic film (305) is formed is 0.8 * Ra0 < = Ra1.

The invention discloses a lithium battery negative pressure formation system and method, a storage medium and electronic equipment. The negative pressure formation system comprises a plurality of negative pressure cups, a gas-liquid separator, a detection assembly, a negative pressure generation device and a controller. Each negative pressure cup is provided with a first opening and a second opening, and the first openings of the plurality of negative pressure cups are used for being communicated with liquid injection ports of a plurality of batteries; the gas-liquid separator is provided with a third opening and a fourth opening, and the third opening is respectively communicated with the plurality of second openings; the detection assembly is provided with a fifth opening and a sixth opening, the fifth opening is communicated with the fourth opening, and the detection assembly is used for obtaining the gas production rate of the plurality of batteries; the negative pressure generating device is communicated with the sixth opening; the controller is in signal connection with the detection assembly and the negative pressure generation device and used for determining a negative pressure value corresponding to the gas production rate according to the received gas production rate obtained by the detection assembly and controlling the negative pressure generation device to generate the corresponding negative pressure value.