21results about How to "Reduce differential pressure" patented technology

The invention discloses a micromotor-driven distributed turbulent flow pumpless liquid cooling device for space thermal control. The micromotor-driven distributed turbulent flow pumpless liquid cooling device comprises a pipeline body and an impeller pump, the impeller pump comprises an impeller with the outer diameter being D and capable of actively rotating. When the impeller pump is used for overall heat dissipation of a single small-size electronic element, one impeller pump is arranged in the cooling flow channel at the position 0.5 D-1. 5D away from the upstream of the small-size electronic element; when the impeller pump is used for eliminating the hot spots of the large-size electronic element, one impeller pump is arranged in the cooling flow channel at the position 0.5 D-1. 5D away from the upstream of each hot spot to be eliminated. An external pump is removed, and the impeller pump is arranged in the cooling flow channel, so that on one hand, a cooling working medium is pumped, on the other hand, a turbulent flow effect is achieved on the cooling working medium, a boundary layer is broken, and the heat dissipation effect is improved. In addition, for a large-scale heat dissipation scene, a plurality of impeller pumps can be arranged in the cooling flow channel in an array mode, the impeller pumps can be placed at local hot spots in a targeted mode, targeted heat dissipation is achieved, and the heat dissipation efficiency and uniformity are further improved.

The embodiment of the present application relates to the technical field of aerosol generating device, and discloses an aerosol generating device, which comprises a liquid storage box assembly, an outer tube and an atomization assembly, the liquid storage box assembly is provided with a liquid injection hole, the outer tube is arranged in the liquid storage box assembly, the atomization assembly is arranged in the outer tube, the atomization assembly is used for atomizing liquid substrate to generate aerosol, the outer tube and the liquid storage box assembly jointly define a first liquid storage cavity, the outer tube and the atomization assembly define a second liquid storage cavity, the first liquid storage cavity is communicated with the liquid injection hole, one end of the outer tube close to the liquid injection hole is provided with a liquid guide hole, and the liquid guide hole is communicated with the first liquid storage cavity and the second liquid storage cavity. Through the above mode, when liquid is injected into the first liquid storage cavity through the liquid injection hole, the embodiment of the present application realizes the reduction of air bubbles and pressure difference in the first liquid storage cavity.

The application discloses a parallel circulating current suppression method and device of a fractional order inverter, electronic equipment and a storage medium, and comprises the following steps: establishing a mathematical model of a fractional order inverter comprising a fractional order inductor and a fractional order capacitor, constructing a voltage and current double control loop based on a fractional order controller based on the mathematical model, and tracking and controlling the output voltage and current of the parallel fractional order inverters, and suppressing the circulating current by power sharing of the parallel fractional order inverters through droop control and fractional order virtual impedance. On the one hand, the voltage and current double control loop based on the fractional order controller can track the output voltage of the inverter, improve the tracking effect of the output voltage, reduce the voltage difference between the inverters, and suppress the parallel circulating current. On the other hand, the droop control combined with the fractional order virtual impedance can improve the power distribution response speed of the fractional order inverter, improve the power distribution accuracy between the inverters, and improve the suppression effect of the parallel circulating current.

The invention provides a DC-DC conversion circuit and a power conversion circuit comprising the same. The DC-DC conversion circuit comprises a positive DC bus, a negative DC bus, a DC power supply and a DC conversion unit. Wherein a neutral line is arranged between the positive direct-current bus and the negative direct-current bus, and the negative electrode of the direct-current power supply is connected with the neutral line. The DC conversion unit comprises a first switch tube, a second switch tube, a third switch tube, a fourth switch tube and a first inductor, two ends of the first switch tube are respectively connected with a positive DC bus and a first end of the first inductor, and two ends of the fourth switch tube are respectively connected with a second end of the first inductor and a positive electrode of a DC power supply; two ends of the second switch tube are respectively connected with the first end of the first inductor and the neutral line. Two ends of the third switch tube are respectively connected with the second end of the first inductor and the negative DC bus. The DC-DC conversion circuit is high in working efficiency and good in EMC (Electro Magnetic Compatibility) characteristic, can be used for a common battery parallel operation system of a single-battery UPS (Uninterrupted Power Supply), and only has one inductor, so that the cost and the space can be saved.

The application relates to the technical field of display devices, and discloses a display device, which comprises a back plate, the back plate being conductive, the back plate comprising a bottom plate; a first lamp strip, the first lamp strip being located on a first side of the bottom plate, the first lamp strip comprising a first circuit board, a driving unit and a first connector; wherein one side of the first circuit board, which is away from the bottom plate, is provided with a first grounding terminal, the driving unit is located on the side of the first circuit board, which is away from the bottom plate, a grounding end of the driving unit is electrically connected with the first grounding terminal, the first connector is connected with an end portion of the first circuit board, the first connector comprises a shell, the shell being conductive, the shell being in contact with the first grounding terminal, one side of the shell, which faces the bottom plate, is provided with a grounding portion, and the grounding portion is in contact with the bottom plate; a printed circuit board, the printed circuit board being located on a side of the bottom plate, which is away from the first lamp strip, the printed circuit board being provided with a second grounding terminal, and the second grounding terminal being electrically connected with the bottom plate. The display device can reduce costs and increase efficiency and is suitable for the design of a narrow lamp strip.

The invention provides a cell sorting method and system of a decommissioned battery, electronic equipment and a storage medium, and relates to the technical field of battery echelon utilization, the method comprises the following steps: respectively carrying out capacity increment test, charge state test and internal resistance test on a target decommissioned battery to obtain a capacity increment curve, a charge state value and an internal resistance value of each cell; calculating a comprehensive discriminant value of each battery cell according to the target characteristic parameter of the capacity increment curve, and removing the battery cells of which the comprehensive discriminant values are greater than a preset discriminant threshold value to obtain a target battery cell; and according to the charge state value and the internal resistance value of the target battery cell, carrying out battery cell category division to obtain a battery cell sorting result. The battery health degree is quantified through the capacity increment curve, the aged and abnormal battery cells are removed, and the screening precision is improved. And the consistency of the battery cells is comprehensively evaluated by combining the grouped charge state test and the internal resistance test, and the retired battery cells in different aging states are effectively identified.

The application relates to the field of water-saving irrigation technology, in particular to a low-power water-saving control irrigation system under complex terrain, which comprises a drip irrigation pipe and a plurality of drip irrigation heads, each drip irrigation head comprises a main cylinder, a core cylinder and a pressure-compensated dripper, one end of the main cylinder is located in the drip irrigation pipe, the core cylinder is slidably arranged in the main cylinder in the axial direction of the main cylinder and separates the main cylinder into a first chamber and a second chamber, the first chamber is communicated with the drip irrigation pipe, a Tesla valve flow channel is arranged between the core cylinder and the main cylinder, the first chamber and the second chamber are communicated through the Tesla valve flow channel, and the water in the first chamber is in deceleration when passing through the Tesla valve flow channel; the pressure-compensated dripper is arranged at the end of the main cylinder far from the drip irrigation pipe and is communicated with the second chamber; the Tesla valve flow channel is arranged to reduce the pressure of the high-pressure water in the first chamber, the water pressure in the second chamber is reduced, and therefore the pressure-compensated dripper with a smaller compensation range can be used, and the compensation precision is improved.

The utility model relates to flue gas treatment field of atmospheric pollution control industry, concretely relates to a desulfurization dust removal denitration integrated equipment. The desulfurization dust removal denitration integrated equipment includes: support separation structure, which separates desulfurization dust removal denitration integrated equipment into three layers of upper, middle and lower in vertical direction, separates into middle area and peripheral area in horizontal direction, denitration chamber is arranged in middle layer middle area, exhaust port is arranged in middle layer middle area, below denitration chamber, air inlet is arranged in lower layer middle area, below exhaust port, N desulfurization filter chambers are symmetrically arranged in middle layer peripheral area, peripheral of denitration chamber and exhaust port, S ash bucket is arranged in lower layer peripheral area, upper box gas chamber is arranged in upper layer area, and N desulfurization filter chambers of the peripheral area and denitration chamber of middle area are communicated. The utility model discloses desulfurization dust removal denitration integrated equipment, and the land area is small, and the investment is saved.

The utility model discloses a low power consumption LDO voltage stabilizing circuit relates to voltage stabilizing circuit field, including LDO chip, input capacitor, output capacitor and is used for reducing the power consumption reduction unit of LDO chip power consumption, wherein the power consumption reduction unit includes the resistor R1 that connects between LDO chip input terminal and output terminal and / or the resistor R2 that connects with LDO chip input terminal in series; one end of the input capacitor is connected with the input end of the LDO chip, the other end of the input capacitor is grounded, one end of the output capacitor is connected with the output end of the LDO chip, and the other end of the output capacitor is grounded. The LDO voltage stabilizing circuit can effectively reduce power consumption, remarkably reduce temperature rise and avoid overheating, and has the advantages of being low in cost, high in compatibility and high in reliability.

The invention provides a power converter and a control method thereof, and relates to the technical field of power electronics, and the power converter comprises a first inductor, a second inductor, a clamping capacitor, a primary side circuit, a transformer and a secondary side circuit. The primary side circuit comprises a first bridge arm and a second bridge arm which are connected in parallel; the first end of the first inductor is connected with the first end of the second inductor, the second end of the first inductor is connected with the midpoint of the first bridge arm, and the second end of the second inductor is connected with the midpoint of the second bridge arm; a primary winding of the transformer is connected between the midpoints of the first bridge arm and the second bridge arm; a secondary winding of the transformer is connected with a secondary circuit; the clamping capacitor is connected in parallel with the first bridge arm; the first end of the first inductor is connected with the AC source anode. The first bridge arm is connected with the AC source cathode. The first bridge arm and the first inductor form a first booster circuit; the second bridge arm and the second inductor form a second booster circuit; the first boost circuit and the second boost circuit are connected in parallel. According to the invention, the current of the transformer in the isolated AC-DC converter can be reduced.

This utility model relates to the field of circulating liquid seal compressor technology, and in particular to a differential circulating liquid seal cylinder with a balance chamber. A low-pressure circulating chamber is provided on the outer surface of the low-pressure piston, forming a low-pressure chamber within the cylinder body between the low-pressure piston end face and the cylinder base. A high-pressure circulating chamber is provided on the outer surface of the high-pressure piston, forming a high-pressure chamber between the cylinder body and the outer surface of the piston rod between the high-pressure piston end face and the cylinder head. A balance chamber is formed between the cylinder body and the outer surface of the connecting rod between the low-pressure and high-pressure pistons. The cylinder body sidewall has a balance inlet and a balance outlet connected to the balance chamber. The gas is first pressurized in the low-pressure chamber, and then the pressurized gas enters the high-pressure chamber for secondary pressurization via a pipeline. This differential pressurization of the compressed gas greatly improves compression efficiency. The gas pressure in the balance chamber balances the piston force generated in the low-pressure or high-pressure chamber, ensuring stable piston operation and guaranteeing the overall lifespan of the cylinder.

The utility model relates to the technical field of switching power supplies, and discloses a high-efficiency adjustable linear circuit, which comprises a BACK circuit, a control circuit, an MCU and a low dropout regulator LDO, the BACK circuit comprises a DC / DC chip, the VCCOUT end of the DC / DC chip is electrically connected with the low dropout regulator LDO, the low dropout regulator LDO comprises a triode Q5, a triode M3, a capacitor C81, a resistor R65 and a resistor R59, and the triode Q5, the triode M3, the capacitor C81, the resistor R65 and the resistor R59 are electrically connected with the control circuit. The VCCOUT end of the DC / DC chip is conducted with the C ends of the triode Q5 and the triode M3, the E end of the triode Q5 is connected to the OUT-end through a resistor R65, the E end of the triode M3 is connected to the OUT + end, and the OUT + end is connected with the control circuit. The circuit is low in power consumption and high in efficiency, voltage and current output by the low dropout linear stabilizer LDO are in a linear relation, stability and reliability of the circuit are improved, voltage drop can be reduced, efficiency can be improved, and heating can be reduced due to the fact that following type dropout voltage control is adopted.

The utility model discloses a hybrid energy -conserving drying machine, including back temperature ware (1), filter (2), two -stage cooler (3), primary cooler (4) and equipment support (5), the primary cooler (4) is supported and is installed through equipment support (5), back temperature ware (1) and compressed air's air inlet intercommunication installation, the air inlet of primary cooler (4) is installed in intercommunication through pipeline with back temperature ware (1) air outlet, the air inlet of two -stage cooler (3) and the air outlet of primary cooler (4) intercommunication installation, adopt normal temperature circulating water and frozen ice water cooperation auxiliary type's circulating cooling system, rely on water liquid and provide cold source not only can greatly reduce energy consumption, also completely solved traditional cold drying machine's high temperature trip and ice block problem, adopt the precooling back temperature device of unique design, make saturated hot compressed air that enters drying machine after three cooling one temperature rise process in proper order, obtain drying compressed air at drying machine exhaust port and the absolute moisture content and relative humidity are very low, and can automatically adjust water temperature and air temperature according to environmental change, make dew point temperature maintain in normal range.

This invention provides a double-sided asymmetrical rotor profile for a high-pressure twin-screw compressor, comprising a male screw rotor and a female screw rotor. The profiles of the male and female rotor teeth mesh with each other and have the same outer diameter. The tooth profiles of the female rotor teeth sequentially include: female I circular arc, female II circular arc, female III circular arc, female I elliptical arc, female circular arc envelope, female IV circular arc, female II elliptical arc, female straight line, and female V circular arc. The tooth profiles of the male rotor teeth sequentially include: male I circular arc, male I circular arc envelope, male II circular arc envelope, male I elliptical arc envelope, male II circular arc, male III circular arc, male II elliptical arc envelope, male straight line envelope, and male III circular arc envelope. This invention's tooth profile is easy to grind, achieving higher surface accuracy. It features a short contact line, wide sealing surface, small leakage triangle, and small pressure difference between working chambers, improving sealing performance, reducing noise and vibration of the main unit, and increasing the lifespan and long-term operational reliability of the main unit bearings.

This utility model provides an anion exchanger backwashing system, relating to the field of chemical desalination and demineralized water production technology. The anion exchanger backwashing system includes an anion exchanger, a resin trap, a mixed ion exchanger, and a storage tank connected in sequence. A backwashing pipeline is connected to the storage tank, and a backwash pump and a backwash regulating valve are installed on the backwashing pipeline. An inlet valve is installed on the connecting pipeline between the resin trap and the mixed ion exchanger. The other end of the backwashing pipeline is connected to the connecting pipeline between the resin trap and the inlet valve. The anion exchanger backwashing system can effectively flush away broken resin stuck on the water cap during the service life, ensuring the water production capacity of the anion exchanger, reducing resin breakage, and effectively extending its service life.

This utility model relates to the field of cooling technology and discloses an internal cooling water system for tire vulcanization processes. The system includes a cooling tower, a circulating cooling water pump group, a pressure tank, a plate heat exchanger, and the internal cooling water pump group. The pressure tank's sidewall is connected to an internal cooling water pipeline, a high-pressure makeup water pump group, and a drainage pipeline. A level transmitter is installed on the outer wall of the pressure tank. A pneumatic switch valve II is installed on the drainage pipeline. The level transmitter is electrically connected to both the high-pressure makeup water pump group and the pneumatic switch valve II. The plate heat exchanger connects the pressure tank, the internal cooling water pump group, the circulating cooling water pump group, and the cooling tower. The cooling tower is connected to the circulating cooling water pump group. This utility model achieves physical separation of the two parameters, "pressure" and "heat," by adding a pressure tank and a plate heat exchanger, thereby significantly reducing the inlet and outlet pressure difference and energy consumption of the internal cooling water pump, and thus greatly reducing the overall energy consumption of the system.

The utility model discloses a cold and dry method online sampling system, and belongs to the technical field of sampling of environment-friendly flue gas emission continuous monitoring systems of coal chemical industry and thermal power plants. The cold dry method on-line sampling system comprises a heating probe rod, one end of the heating probe rod is provided with a filter, one end of the filter is provided with a sampling probe, two sides of the sampling probe are respectively provided with a compressed air control valve and a separation tank, one end of the sampling probe is communicated with a three-way joint, one side of the three-way joint is provided with a peristaltic pump, and the other side of the three-way joint is provided with a water pump. A phosphoric acid titration tank is arranged on the same side of the peristaltic pump, a heat tracing sampling pipe is arranged on one side of the three-way connector, a condenser is installed at one end of the heat tracing sampling pipe, a drying pipe is installed at one end of the condenser, a vacuum sampling pump is communicated with one end of the drying pipe, a three-way switching valve is arranged at one end of the vacuum sampling pump, and the other end of the three-way switching valve is communicated with the three-way connector. And one side of the three-way switching valve is communicated with a calibration three-way valve.

The invention relates to an environment-friendly high-performance scale inhibitor and a preparation method thereof, and belongs to the technical field of industrial circulating water treatment. The component A comprises the following components in percentage by mass: 5-15% of sodium molybdate, 5-15% of sodium tungstate, 15-25% of sodium polyacrylate, 5-15% of sodium borate, 15-25% of zinc sulfate, 5-10% of zinc chloride, 3-8% of sodium silicate and 2-6% of benzotriazole; the component B is prepared from the following components in percentage by mass: 15 to 25 percent of HEDP, 15 to 25 percent of PBTC, 35 to 50 percent of AA / AMPS copolymer and 15 to 25 percent of deionized water. According to the environment-friendly high-performance scale inhibitor and the preparation method thereof, a phosphorus-free and low-toxicity formula is adopted, the environment-friendly corrosion inhibitors such as sodium molybdate and sodium tungstate are used for completely replacing traditional phosphorus-based and chromium-based toxic components, water eutrophication and heavy metal pollution risks are avoided from the source, meanwhile, polymers such as AA / AMPS selected in the formula have good biodegradability, and the scale inhibitor is environmentally friendly and free of pollution. The whole product is safe and low in irritation, and meets the development trend of green chemicals and strict requirements of environmental protection laws and regulations.

This invention relates to the field of gas purification technology and discloses a low-energy desulfurization method: (1) acidic gas and foaming liquid are contacted in a microbubble generator to generate microbubbles, resulting in a gas-liquid mixture; wherein the foaming liquid includes ultrafine particles and complexed iron desulfurization liquid I, the particle size of which is 10-100 μm; (2) the mixture and complexed iron desulfurization liquid II are contacted counter-currently in an absorption tower to undergo an oxidation-reduction reaction, resulting in purified gas and desulfurized rich liquid; (3) the desulfurized rich liquid and air are oxidized and regenerated in an oxidation regeneration tank to obtain regenerated gas, regenerated lean liquid, and regenerated sulfur slurry; (4) the regenerated sulfur slurry is separated in a separator to obtain sulfur and filtrate; the regenerated lean liquid and / or filtrate are returned to the absorption tower for recycling. The low-energy desulfurization method provided in this invention can improve the bubble effect of the microbubble generator, reduce the impact energy consumption of the microbubble generator, improve the mass transfer efficiency of the absorption tower, and help reduce desulfurization energy consumption.

The utility model relates to a liquid drainage and gas production device, and relates to the technical field of natural gas production and development equipment. The liquid drainage and gas production device comprises a sleeve, a sealing plug and a floating body. The sleeve is provided with a cavity extending in the axial direction, an annular limiting boss extending inwards in the radial direction is arranged on the inner wall of the sleeve, and a first through hole is formed in the inner wall of the annular limiting boss. The sealing plug is arranged in the cavity and is in clearance fit with the sleeve, the sealing plug is arranged on one side of the annular limiting boss in the axial direction, and the sealing plug is provided with a fluid channel for fluid in the shaft to penetrate through the sleeve. The floating body is arranged on the side, away from the sealing plug, of the limiting boss and connected with the sealing plug, and the floating body can move relative to the sealing plug in the axial direction. The device comprises a first state and a second state. In the first state, the floating body ascends on the shaft, so that the sealing plug closes the first through hole, and the floating body blocks the fluid channel. And in the second state, the floating body moves downwards in the shaft, so that the floating body conducts the fluid channel, and the sealing plug opens the first through hole.

This utility model discloses a filtration system for dry-process polyacrylonitrile-based raw materials, belonging to the field of spinning technology. The technical solution is as follows: The filtration system for dry-process polyacrylonitrile-based raw materials includes a main feed pipeline and a controller; the main feed pipeline is connected to a filter 1 via a branch pipeline 1, which is equipped with a gear metering pump 1; the outlet of the gear metering pump 1 is connected to the filter 1, and the gear metering pump 1 is electrically connected to the controller; the outlet of the filter 1 is connected to a filter 2 via a branch pipeline 2, which is equipped with a pressure sensor 1 and a gear metering pump 2; the outlet of the gear metering pump 2 is connected to the filter 2, and both the pressure sensor 1 and the gear metering pump 2 are electrically connected to the controller; the outlet of the filter 2 is connected to a filter 3 via a branch pipeline 3, which is equipped with a pressure sensor 2 and a gear metering pump 3. This utility model reduces filter pressure differential, minimizes gel penetration, and improves filtration accuracy through multi-stage filtration.