36603 results about "Electromagnetic valve" patented technology

A camera washing device has an air pump, a wash water tank storing wash water, an injection nozzle with an injection part, a junction joint having a high-pressure air passage and a wash water passage, and an electromagnetic valve. The air pump generates and supplies high-pressure air to the high-pressure air passage. When the control part instructs the electromagnetic valve to be switched to an open state, the wash water and the high-pressure air are mixed in the junction joint to generate water particles. The generated water particles are supplied to the injection nozzle. When the electromagnetic valve is switched to the open state after injecting the high-pressure air only to a lens of a rear camera, the injection part injects the water particles to the lens of the camera.

A small oxygen enriching apparatus which can supply oxygen-enriched gas at high flow rate without imparting unnatural sensation to a user, as well as a controller and recording medium therefore. In step 100, a judgment is made as to whether a flow rate set by use of a flow-rate setting unit 45 is equal to or less than a continuous base flow rate (3 liters / min). When the set flow rate is a low flow rate of not greater than 3 liters / min, breath-synchronized operation is not performed (continuous supply is to be performed), and therefore, in step 110, oxygen-enriched gas is supplied continuously at the set flow rate. When the set flow rate is a high flow rate of greater than 3 liters / min, breath-synchronized operation is to be performed, and therefore, in step 120, the orifice is set to an opening that enables supply at 5 liters / min. In step 140, in order to perform breath-synchronized operation, control for opening and closing an electromagnetic valve 47 is performed. Through this operation, the oxygen-enriched gas is supplied at a high flow rate (5 liters / min) in the inhalation period of each breathing cycle and at a low flow rate (2 liters / min) in the exhalation period via a bypass flow passage 50.

A medical aspirator including an aspiration port, a reciprocating type electric pump for performing vacuum aspiration, a ventilation path which connects the aspiration port and the electric pump, an exhaust port, and an atmospheric pressure obtaining release valve for releasing a negative pressure in the ventilation path to obtain atmospheric pressure therein. The medical aspirator is particularly useful for percutaneous thrombus removal operation. A diaphragm pump is used as the electric pump. An electromagnetic valve is used as the atmospheric pressure obtaining release valve. The atmospheric pressure obtaining release valve is opened and closed in association with stopping and starting of the electric pump. A cell is provided as an internal power supply.

An electromagnetic manipulating portion of an electromagnetic valve includes a fixed iron core fixedly disposed in the inside hole of a bobbin and a movable iron core movably disposed in the inside hole and attracted to the fixed iron core by a magnetic attraction force. The fixed iron core and the movable iron core are composed of the same normally magnetic material in the same shape and in the same size and have compatibility each other.

The invention belongs to the field of agricultural plant protection machinery, and provides a precise targeted spraying and weeding device. The spraying and weeding device comprises a farmland information acquisition and processing system, a spraying system and a control system. The spraying and weeding device finishes acquisition and processing of images in real time and identifies crops and weeds; a DSP (digital signal processor) sends weed positions and density information acquired after the images are processed to an ARM (advanced RISC machine) processor; and the ARM processor realizes combination of different spray heads and opening of an electromagnetic valve by combining the received speed, flow and pressure information and controlling so as to perform precise targeted spraying on the weeds. By adopting a targeted spraying weedicide mode, the device reduces weeding labor and consumption of pesticide, saves the cost and relieves the pollution of the pesticide to the environment.

The invention relates to a lid locking device for the safety of electric pressure cooking saucepan and a control method thereof, the lid locking device for the safety of electric pressure cooking saucepan comprises a switch button arranged on the lid, a clasp under the switch button hinged with the lid, a clasp head at the downward end of the clasp connected with the saucepan body, a exhaust hole arranged on the lid. The invention is characterized in that the exhaust hole is provided with a press piece for sealing, a push rod is arranged beside the press piece, one end of the push rod is near the press piece, and the other end of the push rod is hinged with one end of a connecting rod and extends under the switch button on the lid, the middle of the connecting rod is hinged on a hinge support, and the other end of the connecting rod is connected with a driving mechanism. The driving mechanism includes an electromagnetic valve arranged inside the lid, the other end of the connecting rod is hinged with a valve rod of the electromagnetic valve, the push rod is provided with a compressed spring and / or the connecting rod is provided with an offsetting spring, the electromagnetic valve is arranged on the lateral side of the push rod. The invention has the advantages of simple and reasonable structure, high safety degree, and flexible operation.

The invention relates to a metal powder preparation device and method therefor. The device comprises an atomization furnace, a heater, a cooler, an atomization chamber, an atomizer, a pneumatic classifier, a middle bin, a sieving funnel, a screening machine, a deduster, a balance tank, a shell-and-tube heat exchanger, a vacuum obtaining device, a control system, an infusion tube, a conduit, a pipeline, a gas channel, a pneumatic butterfly valve, an electromagnetic valve and the like. The method comprises atmosphere preparation, metal smelting, infusion, centrifugal atomizing, pneumatic classification, mechanical screening, gas purification, cooling and the like, the metal is smelted and treated so as to be poured onto the atomizer for centrifugal atomization to form powder, the powder is classified by the pneumatic classifier, after classification, rough powder is screened by the mechanical screening so as to obtain the finished powder, fine powder is sent into the deduster by airflow for purification, the purified gas is driven by a high pressure centrifugal fan so as to be speeded up to be atomized and classified again after being subjected to heat exchange through the shell-and-tube heat exchanger. The device can be used for continuous production of spherical powder below -320 meshes, and the oxygen content is less than or equal to 80ppm.

A pressure fryer is provided including a cooking container having a pressure vent which is connected to a high pressure cylinder filled with carbon dioxide. An electromagnetic valve and a check valve are provided on the connecting tube between the pressure vent and the high pressure cylinder. A lid includes a safety valve and a pressure sensor. A controller opens and closes the safety valve and the pressure for the electromagnetic valve for supplying carbon dioxide into the cooking container based on the pressure therein which is obtained from the pressure sensor, such that the pressure in the cooking container can be maintained within a predetermined value.

A small oxygen enriching apparatus which can supply oxygen-enriched gas at high flow rate without imparting unnatural sensation to a user, as well as a controller and recording medium therefore. In step 100, a judgment is made as to whether a flow rate set by use of a flow-rate setting unit 47 is equal to or less than a continuous base flow rate (2 liters / min). When the set flow rate is a low flow rate of not greater than 2 liters / min, breath-synchronized operation is not performed (continuous supply is to be performed), and therefore, in step 110, oxygen-enriched gas is supplied continuously at the set flow rate. When the set flow rate is a high flow rate of greater than 2 liters / min, breath-synchronized operation is to be performed (supply during the inhalation period only of each breathing cycle), and therefore, in step 120, oxygen-enriched gas is continuously supplied at the continuous base flow rate. In step 140, in order to perform breath-synchronized operation, control for opening and closing an electromagnetic valve 45 is performed. That is, oxygen-enriched gas is supplied during the inhalation period only of each breathing cycle, and supply of oxygen-enriched gas is stopped during the exhalation period.

The invention discloses a thermostat dehumidification control method of an air conditioner. The air conditioner comprises a compressor, a condenser, an electronic expansion valve, an evaporator, a four-way reversing valve, an outdoor fan, an indoor fan, an indoor temperature sensor, an indoor humidity sensor and an outdoor temperature sensor; and the evaporator is divided into a heating section and a dehumidifying section by a dehumidifying electromagnetic valve. The dehumidifying operating mode of the air conditioner is divided into a cold room dehumidification control mode and a thermostat dehumidification control mode according to the difference between the temperature detected by the indoor temperature sensor and the temperature set by a remote controller. When the air conditioner is in the thermostat dehumidification control mode, the thermostat dehumidification control mode is further subdivided into three control areas according to the relative humidity detected by the indoor temperature sensor, thus the purposes of reducing the indoor temperature and keeping the temperature constant are achieved by controlling the frequency of the compressor, the rotation speed of the outdoor fan and various valves, and a conformable indoor environment is provided for the user.

The invention discloses a machine vision automatic detection system for rivets. The machine vision automatic detection system for rivets comprises a PLC (programmable logic controller), two industrial cameras, a storage bin, a vibration feed plate, a linear rail, a mechanical rotary plate, a waste product blowing pipe, a waste product discharging trough, a salable product blowing pipe, a salable product discharging trough, discharging baffles, an image acquisition card, an industrial personal computer, a touch screen, an electromagnet, a pneumatic electromagnetic valve, an upper sensor, a lower sensor, a hole sensor, a count sensor, a stepping motor drive and a stepping motor. The detection precision of the machine vision automatic detection system for rivets is within + / -0.03mm, and the electromagnetic valve is controlled by the PLC to complete precise waste product blowing and realize separation of salable products from waste products. The final number of the salable products is accurately recorded by a counter, and a discharging port is closed according to time difference to prepare for a subsequent packaging procedure. In addition, all data are recorded in a database, and various production, client, analysis and CPK (complex processing capability index) report forms can be generated by one key.

A microvalve and microthruster are provided. Both include a housing with an interior in which an armature can travel and abut a valve seat to provide an electromagnetic valve. The armature acts as a valve body that is maintained in a or normally closed position by a permanent magnet, and is opened by interaction with a selectively activatable electromagnet. A microthruster is provided by fashioning the valve discharge as a nozzle, preferably of a material that is permanently and selectively magnetizable, so that the nozzle functions as the permanent magnet and which magnetism can be adjusted to assure proper opening and closing of the valve portion. The valve body is guided without any sliding fit mechanism and is suitable for controlling gas or liquid fluid flows.

The invention discloses a heat pipe composite air conditioning unit for a machine room and a control method of the heat pipe composite air conditioning unit. The heat pipe composite air conditioning unit is characterized in that a heat pipe module and a refrigerating module are combined to form a cold source system in the air conditioning unit, the refrigerating module consists of a compression unit, a condenser, a throttling mechanism, an evaporation channel of an evaporation condenser and the like which form a first working medium circulating loop, the heat pipe module consists of an indoor heat exchanger, a main electromagnetic valve, an air-cooling heat exchanger, a condensation channel of the evaporation condenser, a liquid storage device, a liquid pump and the like which form a second working medium main loop, a bypass branch is arranged between an outlet of the indoor heat exchanger and an inlet of the condensation channel of the evaporation condenser, and a bypass electromagnetic valve is disposed in the bypass branch. A wide annular temperature zone is divided into three functional zones including a refrigerating zone, a composite zone and a heat pipe zone, and working modes of running refrigerating circulation, composite circulation and heat pipe circulation are correspondingly switched and run by the cold source system according to the different functional zones. By the aid of the heat pipe composite air conditioning unit and the control method thereof, utilization of outdoor natural cold sources can be maximized, and low-cost running and energy conservation can be realized.

The invention relates to a greenhouse suspended self-propelled target-oriented sprayer system and an operation method thereof. The greenhouse suspended self-propelled target-oriented sprayer system is characterized by comprising a guide way, a self-propelled mobile platform, a hall sensor, a spraying manipulator device, a binocular vision system and a PLC (Programmable Logic Controller), wherein a plurality of magnetic positioning marks are preinstalled on the guide way; the self-propelled mobile platform is arranged on the guide way through a walking mechanism and provided with the hall sensor; the spraying manipulator device comprises a Z direction cross-shear hanger which is arranged on a rack; a spray rod is horizontally arranged below the hanger through a rotary positioning mechanism; a spray pipe is fixedly arranged on the spray rod; a plurality of spray heads are arranged on the spray pipe at intervals and independently controlled by electromagnetic valves; the hanger has the functions of extension and retraction; the binocular vision system comprises two CCD (Charge-Coupled Device) video cameras; the two CCD video cameras are fixedly installed on both ends of the spray rod respectively and connected with an upper computer in which control software is prearranged; and the PLC is electrically connected with the upper computer, the hall sensor, a frequency converter, a drive controller, the electromagnetic valves and the CCD video cameras respectively.

A double-motor driving type electronic hydraulic brake system capable of actively simulating pedal feeling comprises a brake pedal, a fluid storage tank used for storing brake fluid, a pedal displacement sensor, a pedal force sensor, a hydraulic force sensor, an electronic control unit, an electromagnetic valve, an electronic stability control module, a brake master cylinder and a secondary master cylinder. An electric control linear movement module comprises a rotating motor and a speed reduction and moment increasing mechanism which converts the rotating movement of the motor into linear movement to achieve the active control over system hydraulic brake force and pedal force. The pedal force of a driver can be fully used for reducing pressure. While the active control over the pedal force is achieved, a pedal force simulator of a complex structure is omitted, the feeling of a brake pedal is guaranteed, and the accurate automobile brake condition is fed back to the driver. The active control over the hydraulic force is achieved, and the brake requirement for automatic driving vehicles is met; maximum braking energy recovery is achieved, control is precise, and the response speed is high; double-loop braking is achieved, failure protection is considered thoroughly, and the safety is good.

The invention relates to a lid locking device for the safety of electric pressure cooking saucepan and a control method thereof, the lid locking device for the safety of electric pressure cooking saucepan comprises a switch button arranged on the lid, a clasp under the switch button hinged with the lid, a clasp head at the downward end of the clasp connected with the saucepan body, a exhaust holearranged on the lid. The invention is characterized in that the exhaust hole is provided with a press piece for sealing, a push rod is arranged beside the press piece, one end of the push rod is nearthe press piece, and the other end of the push rod is hinged with one end of a connecting rod and extends under the switch button on the lid, the middle of the connecting rod is hinged on a hinge support, and the other end of the connecting rod is connected with a driving mechanism. The driving mechanism includes an electromagnetic valve arranged inside the lid, the other end of the connecting rodis hinged with a valve rod of the electromagnetic valve, the push rod is provided with a compressed spring and / or the connecting rod is provided with an offsetting spring, the electromagnetic valve is arranged on the lateral side of the push rod. The invention has the advantages of simple and reasonable structure, high safety degree, and flexible operation.

The invention discloses a domestic atomizing dish washing machine and a commercial atomizing dish washing machine. When dishes are washed by the domestic atomizing dish washing machine, a drawer-type dish basket with a door lock opened is pulled out of the dish washing machine. Dirty tableware is placed in the drawer-type dish basket, the drawer-type dish basket is pushed into the dish washing machine, a running button is pressed, and tap water flows into an inner tank through a water inlet electromagnetic valve and then flows into a water tank. After the water tank is full, the water inlet electromagnetic valve is closed. A fan is started, a water pump is started, and a power supply heating pipe is connected. Air blown by the fan passes through an air outlet condensation pipe, an ozone generation device, an electric heating wire and an opened and connected air outlet electromagnetic valve to enter an air outlet pipe, and then the air passes through an upper air pipe to be blown out from an air outlet of a capillary air pipe in a conical nozzle of a rotary spray arm. Water pumped by the water pump is filtered by a filter screen to enter a water outlet pipe through a water outlet electromagnetic valve and finally enters the conical nozzle of the capillary air pipe to be mixed with the air blown out from the air outlet of the capillary air pipe to be sprayed out from the conical nozzle in atomizing mode to wash dishes. The atomizing dish washing machine further has the functions of drying, sterilizing and automatically putting in dish washing powder.

The invention discloses a vehicle stability integrated control method based on a variable-weight model prediction algorithm. The method is mainly aimed at yawing motion and side-tipping motion of a vehicle to improve the stability and the riding comfort of the vehicle. The method mainly comprises steps as follows: step one, vehicle driving state information is acquired and subjected to estimation processing; step two, reference state values for keeping the yawing stability and the side-tipping stability of the vehicle are decided respectively; step three, a variable-weight model prediction control algorithm is used, a front wheel rotating angle and tire braking force are taken as control variables, and vehicle yawing and side-tipping stability control are integrated; step four, expected tire braking force is compared with actual pressure of a brake tube, an action instruction of an electromagnetic valve is determined, an additional front wheel rotation angle and steering action of a driver are superposed, and a final front wheel rotation angle is obtained; step five, a brake executer and a steering executer execute the action instruction of the electromagnetic valve and a front wheel rotation angle instruction, so that the vehicle keeps the yawing stability and side-tipping stability.

The invention discloses a time-delay boosting electric pressure cooker which comprises a cooker body, wherein a controller, a connecting plate, a sliding chute, a sliding block, a supporting rod, a cooker cover, a handle, an exhausting column, a gas outlet head and an electromagnetic valve are arranged on the cooker body; the controller is fixedly connected in front of the cooker body; the connecting plate is fixedly connected to the upper right of the cooker body; the sliding chute is located inside the connecting plate; the sliding block is movably connected inside the sliding chute; the supporting rod is fixedly connected to an upper end of the sliding block; the cooker cover is fixedly connected to a left end of the supporting rod; and the handle is fixedly connected to an upper end ofthe cooker cover. The controller, the electromagnetic valve and a temperature sensor can be combined to effectively control the pressure in the electric pressure cooker when cooking rice, and rapidlyabsorb enough water when the interior of the cooker is in a semi-high pressure state; the electromagnetic valve is controlled to be closed by the controller after reaching a set time, and then the cooker continues to boost.

The invention discloses a remote intelligent irrigating fertilizing system, comprising a collecting module, a central controlling module and an executing module, wherein the collecting module uses a sensor to collect field on-site humidity, inlet and outlet water levels, weather, temperature and lightness, the central controlling module receives the collected data from the collecting module, via a central control computer to calculate out the fertilize formula and the water consumption, to be sent to the executing module, the executing module comprises a programmable controller exchanging data with the central controlling module to control the switches of an electromagnetic valve, a filter, a flux meter, a metering water pump, and an automatic rotary mixing chamber. The invention can calculate out the fertilizer formula and water consumption according to the basic information of field, so as to automatically control the inferior devices to intelligently irrigate and fertilize, with real-time property, high efficiency and wide application.

The invention relates to a high-speed electromagnetic valve driver circuit. An input signal buffer unit mainly performs buffering shaping on an input signal from an external central control unit and improves the antijamming capacity thereof; a high side current detection unit realizes current detection by detecting differential voltage of one resistor in a load branch circuit; a PWM signal generator mainly generates a PWM wave with fixed frequency, the current is controlled and kept by regulating the duty cycle of the waveform; a power drive unit mainly supplies enough power drive for a power NMOS tube so that the power NMOS tube can fully operate in a switch state and reduce switch loss and heating; a signal time delay unit outputs a time delay for a current detection signal; in the delay time, the power NMOS tube is cut off, so that a coil can have afterflow; a logical gate circuit unit is a coincidence gate and generates a synchronizing signal required by the PWM signal generator after performing phasing on the current detection signal and a time delay signal thereof.

The invention provides a vapor-injected air-conditioning system, a vapor-injected air-conditioning control method and an air-conditioner, which can solve the problems of incapability of refrigerant flow adjustment, complex structure, poor refrigerating / heating effect and the like of the prior art. The technical scheme includes that the vapor-injected air-conditioning system comprises a compressor, a controller, a four-way valve, a condenser, an evaporator, a flash evaporator, an electromagnetic valve and refrigerant pipes. Two refrigerant pipe connector ends of the flash evaporator are arranged at the refrigerant pipes between the evaporator and the condenser and connected with the refrigerant pipes on the respective side, a refrigerant outlet at one end of the flash evaporator is connected with the compressor through one refrigerant pipe provided with a one-way valve and the electromagnetic valve, and an electronic expansion valve is arranged on the refrigerant pipe arranged between the condenser and the flash evaporator. A vapor-injected flow control system is simplified, cost is reduced, refrigerant flow control of the system is optimized by using the electronic expansion valve for controlling, and refrigerating and heating performances are improved.

The invention discloses a testing system for critical pressure during thermal explosion of explosives. The testing system comprises a pressure-resistance heating unit, a pressure control unit, a sample loader unit, a decomposed product detection unit and a computer; the pressure-resistance heating unit comprises a single-cavity heating furnace body, wherein a temperature sensor which is connected with the computer is arranged in a furnace cavity, and temperature, temperature rise speed and pressure of the single-cavity heating furnace body are controlled by the computer; the pressure control unit comprises a high-pressure gas cylinder, a pressurizing gas channel pipe, a pressurizing electromagnetic valve, a heat conduction layer extension edge pressurizing pipe, a pressure-releasing gas channel pipe, a pressure-releasing electromagnetic valve, a safety valve gas channel pipe, a safety valve and a pressure sensor; the sample loader unit comprises an L-shaped bracket, a stepping motor, two fixed pulleys, a steel wire rope, a furnace cover, a sample reservoir bracket and a sample reservoir; the decomposed product detection unit comprises an infrared sensor which is arranged in the sample reservoir; and the computer is provided with a data acquisition card, a graphic display control and a data processing unit and can be used for identifying the critical state of thermal decomposition to combustion or explosion and acquiring a critical pressure parameter.

The invention relates to a heat pump hot water unit with in-water cycling heat exchanging loop, comprising refrigerant loop system, water-refrigerant heat exchanging system, signal collection and circuit control system. It is characterized in that the water-refrigerant heat exchanging system adopts forced internal-cycling loop constituted by water-refrigerant heat exchanger, reflux tube and internal-cycling pump or natural internal-cycling loop which uses diversion sleeve to separate spiral heat exchanger in heat storing water tank and water pre-heating device can be collocated; the refrigerant loop system has single cycling of single air heat source, independent cycling of double heat source with four functions and adopts the structure of three-way electromagnetic valve with pneumatic valve, four-way valve and multiple-path restrictor so as to make switch of all cycles convenient; wind-cold heat exchanger also has water fin tube. The unit efficiency of invention is high and defrosting in winter is complete. Pressure can not be overloaded in summer. Hot water in 55deg.C can be supplied quickly and continuously. Waste heat can be reclaimed or solar hot water can be made use of. It can save energy by 70-85% compared with electric water heater in annual average. The independent cycling unit with double heat source has refrigeration, heating, heating water and heating water with refrigeration functions.

The invention provides an intelligent venous transfusion monitoring system, which comprises a PC, a ward-level controller, sickbed-level controllers, infusion supports and a handheld alarming device, wherein the ward-level controller is arranged according to a ward number; the ward-level controller performs wireless communication with the sickbed-level controllers correspondingly arranged in the ward with the ward number; the ward-level controller is connected with the PC by an Ethernet for communication; and each infusion support is provided with a sickbed-level controller correspondingly. The system has the advantages of realizing 24 hour monitoring, avoiding errors made by medical-care personnel due to mistake or fatigue, reducing the labor intensity of the medical-care personnel and making up for the disadvantage of incapability of the medical-care personnel for 24 hour monitoring. In the invention, the real-time monitoring of the whole infusion state as well as abnormal condition alarming and management is realized, and the combination of infusion and ward emergency call and ward management systems. The monitoring system has high feasibility and is built on the basis of mature technology of sensors, electromagnetic valves, wireless communication, Ethernet communication, singlechips and the like.

The invention mainly discloses a river way multipoint water quality monitoring apparatus and a monitoring method therefor. The monitoring apparatus includes a monitoring body, a power apparatus and water collectors. A solar cell panel, a storage battery and a protective cover are disposed on the top surface of the monitoring body. At least three water collectors are disposed under the monitoring body through telescopic rods. A water storage chamber is arranged in each water collector. A water collection port is arranged on the bottom of each water collector and is provided with a sealed cover. A sampling tube is disposed in each telescopic rod. A detection chamber provided with a detection head and a wireless communication module are arranged in the monitoring body. One end of the sampling tube is connected to the water storage chamber. The other end of the sampling tube is connected to a splitting pipe through an electromagnetic valve. The splitting pipes are connected to the detection chamber. The monitoring apparatus is used for performing multipoint auto-monitoring to a to-be-detected water area for a long time instead of manual work. The monitoring apparatus is environment-friendly and economical, has sufficient energy and has wide detection range, can detect multiple water points at the same time and can get many detection data. Water collection and detection are separated into two independent parts, so that damage on the detection head due to aquatic animals is avoided, quality and service life of the monitoring apparatus are improved, and detection accuracy is increased.

The invention discloses an electromagnetic valve iron core assembly assembling machine. The electromagnetic valve iron core assembly assembling machine comprises a four-station rotary disc mechanism, an iron core rod feeding mechanism, a plug feeding mechanism, a hold-down mechanism and a discharging mechanism. The iron core rod feeding mechanism, the plug feeding mechanism, the hold-down mechanism and the discharging mechanism are annularly located on the periphery of the four-station rotary disc mechanism; and four sets of equant iron core rod clamps are arranged on rotary discs of the four-station rotary disc mechanism and are sequentially opposite to the iron core rod feeding mechanism, the plug feeding mechanism, the hold-down mechanism and the discharging mechanism. By means of the above manner, the electromagnetic valve iron core assembly assembling machine can replace manual work to automatically, efficiently and orderly complete assembling of electromagnetic valve iron core assemblies, the labor force is saved, and the production cost is reduced.

The invention discloses an intelligent dust concentration limit setting spray dust settling device. The device comprises a control unit, a dust concentration sensor, an electromagnetic valve and a sprinkler head, wherein the signal output end of the dust concentration sensor is connected with a signal input end of the control unit; a control signal output end of the control unit is connected with a control signal input end of the electromagnetic valve; and the control unit realizes spray control over the sprinkler head through the switching of the electromagnetic valve. In the device of the invention, the dust concentration limit is manually set; the spraying starts when the dust concentration limit exceeds an upper limit value and stops when the dust concentration limit is less than a lower limit value; and thus the meaningless waste of water resource is prevented, the water logging in roadways is reduced, the working conditions are improved and the health and the safety of mine workers are ensured. In addition, the invention also discloses an intelligent dust concentration limit setting spray dust settling system, so the remote on-line monitoring of the dust concentration can be realized; meanwhile, the invention also discloses an intelligent dust concentration limit setting spray dust settling method.

The invention discloses a micro-channel type cooling method which is mainly applied to the field of cooling of packaging boards integrating with multiple high-power chips. According to the micro-channel type cooling method, heat sources integrated on a substrate are respectively provided with a temperature sensor, the temperature sensors are connected with an external controller, a cooling plate with liquid flow channels is arranged above the substrate integrated with the multiple heat sources in a covering mode, and the controller controls the starting and stopping of a turbine pump and fans according to data collected by the temperature sensors; if the power of the heat sources is stable, the number of micro-channels is set properly according to the power of the heat sources, a main flow channel is provided with a regulating valve which is controlled by the controller, and thus the flow of liquid is regulated; if the power of the heat sources is changeable, the flow channels are evenly distributed, a flow electromagnetic valve controlled by the controller is arranged at the bifurcation between the main cooling flow channel and each heat source micro-flow-channel, flow distribution of each power device is regulated according to actual working conditions, and thus the multiple heat sources can be cooled stably and efficiently, and the cooling capacity can be adjusted.