45results about How to "Thermal control" patented technology

The invention relates to the technical field of engineering machinery, in particular to a cooling system and a control method thereof. The cooling system comprises a controller, temperature sensors, a pulse width modulation (PWM) direct-current speed controller, thermostats, fans and a rotation speed sensor. All heat dissipation modules are independently provided with the temperature sensors, the thermostats and the fans. The temperature sensor can monitor the temperatures of all the heat dissipation modules in real time. The controller gives out a control signal to the PWM direct-current speed controller according to a temperature signal. The PWM direct-current speed controller can adjust the thermostats of all the heat dissipation modules to be turned on or turned off and can also adjust the rotation speeds of the fans according to the control signal. In this way, a complete machine is reasonably controlled to dissipate heat in real time, all the heat dissipation modules of the complete machine are kept in the most ideal temperature ranges all the time, meanwhile, the power consumption of the fans is reduced to the greatest extent, and the efficiency of the complete machine is improved.

This invention discloses a sort of LED flaring element which adopt the complex flaring technique of fluorescent powder, it makes the LED flaring wafer of metal base plate embark locate in a transparent cover, the transparent cover is full of liquid in order that the liquid can submerge the whole surface of LED flaring wafer and it accession fluorescent powder in the liquid, so the fluorescent powder equably disperse in the liquid of the surface of LED flaring wafer. This invention ameliorates the method of the distribution of the external fluorescent powder, it effectively avoids the phenomenon that the fluorescent powder in the surface of LED flaring wafer heat up in the high temperature and reduces the aging of the fluorescent powder and reduce the light attenuation greatly.

The invention provides an opto-isolator, whichcomprises a pipe, an isolator core arranged inside the pipe, and an input collimator and an output collimator which are arranged at two ports of the pipe, wherein the isolator core comprises a first magnet ring, a second magnet ring, a third magnet ring and an isolation device; and the isolation device comprises a pair of birefringent chips and a Faraday rotation chip arranged between the pair of birefringent chips. The opto-isolator has a structure that the three magnet rings are combined, so that a magnetic field in a light passing area on the Faraday rotation chip in the isolation device is in a saturated state; and therefore, the radiating capacity of the Faraday rotation chip can be enhanced and heat on the core part of the opto-isolator is more easily dissipated; and moreover, two temperature sources in the opto-isolator are separated by a distance, so that the two temperature sources do not interfere each other, and the heat dissipation of the opto-isolator is facilitated.

The invention provides a refrigerator and a control method used for a cooling draught fan of a refrigerator compressor. The control method comprises the step that power supply voltage of the cooling draught fan is controlled according to current environment humidity and the current environment temperature of the refrigerator and current rotary speed of the compressor. The refrigerator comprises the compressor, the cooling draught fan used for cooling the compressor and a control device which is assembled to confirm the power supply voltage of the cooling draught fan according to the current environment humidity and the current environment temperature of the refrigerator and the current rotary speed of the compressor. According to the refrigerator and the control method used for the cooling draught fan of the refrigerator compressor, controlling can be conducted on rotary speed or the power supply voltage of the cooling draught fan according to the current environment humidity and the current environment temperature of the refrigerator and the current rotary speed of the compressor, and compared with the prior art that by using the fixed rotary speed or the current environment temperature of the refrigerator and the current rotary speed of the compressor to control the power supply voltage of the cooling draught fan, cooling of the compressor is controlled more accurately.

The invention discloses an aluminum alloy complex disc part isothermal precision forging die, and relates to an aluminum alloy disc part isothermal forging die. The invention solves the problems that the prior complex disc parts are difficult to fully fill metal, and easy to generate streamline turbulence, vortex and percolation during the forging. The connecting part of a die cavity is provided with a material storage cabin; the precision forging die also comprises a plurality of resistance wires, an asbestos board and an aluminum silicate board; an upper forging die and a lower forging die are both provided with the plurality of the resistance wires inside; and the asbestos board and the aluminum silicate board are coated on the surface of the precision forging die from inside to outside. The die adopts a double-layer heat insulation structure and effectively controls the heat dissipation of the precision forging die body, and the temperature difference is controlled within 5 DEG C; and the material storage cabin arranged on the connecting part of the die cavity effectively improves the streamline of forgings and avoids the generation of streamline fold, streamlines of the formed complex disc parts are distributed along the geometric shapes of the parts, the internals are evenly distributed, and the grain size is even and fine.

The invention provides a heat dissipation control method. The heat dissipation control method is used for controlling heat dissipation elements and heating elements of a network device to carry out heat dissipation on the network device. The heat dissipation control method comprises the steps of (1) sensing the temperature of the heating elements, and sending a first heat dissipation instruction when the sensed temperature is larger than a first preset temperature; (2) improving the heat dissipation capacity of the heat dissipation elements according to the first heat dissipation instruction to reduce the temperature of the heating elements; (3) sending a consumption reduction instruction when the heat dissipation elements carry out heat dissipation in a maximum strength mode, and it is ensured that the sensed temperature is larger than a second preset temperature; (4) controlling the heating elements according to the consumption reduction instruction to reduce power consumption of the heating elements so as to enable the temperature of the heating elements to be smaller than or equal to the first preset temperature, wherein the second preset temperature is larger than the first preset temperature. The heat dissipation control method achieves the purpose of ensuring long-term reliability of the network device. The invention further provides a heat dissipation control system and the network device.

The invention discloses an engine and a cooling system of the engine. The cooling system of the engine comprises a cylinder body pipeline, a cylinder cover pipeline, a water pump, a radiator, a first thermostat and a heating assembly. The first end of the radiator is communicated with a water inlet of the water pump, a first joint of the first thermostat is communicated with the second end of the cylinder body pipeline and the second end of the cylinder cover pipeline, and a second joint and a third joint of the first thermostat are communicated with the two ends of the radiator respectively; an inlet of the heating assembly is communicated with at least one of the cylinder cover pipeline and the cylinder body pipeline and an outlet of the heating assembly is communicated with the first joint of the first thermostat. According to the cooling system of the engine, the use efficiency of energy is improved, control is convenient, a comfortable heating environment can be provided, the use rate of energy can be increased, energy is saved, and environment friendliness is achieved.

The invention relates to a ventilation-humidification coupled solid-state fermentation tank which comprises a main tank body the outer side of which is provided with a temperature control jacket, a tank cover and a material tube. The top surface of the tank cover is a screen mesh type tank cover surface, and the tank cover and the main tank body are fastened through a fastening buckle arranged at the edge of the top of the tank cover; a screen mesh type material tank bottom is arranged on a supporting ring stand and is provided with a first rubber ring washer for sealing; and a ventilation-humidification coupled unit is arranged at the bottom of the main tank body and comprises branched vent pipes, a sterilized water layer and vent pipes, and the branched vent pipes are distributed inside the sterilized water layer and are connected with the vent pipes. According to the solid-state fermentation device, the dust in the air is filtered off through introducing the air into the sterilized water layer, and the air containing water molecules is introduced into materials, so that air sterilization inside the tank is realized while the material humidity is maintained, and the redundant heat generated during the solid state-fermentation is dissipated; solid-state fermentation of aerobic bacteria is realized; and the ventilation humidification coupled solid-state fermentation tank has the advantages of novel principle, simple structure and low manufacturing cost, and is convenient in operation, generalization and production.

The invention relates to a novel high-power LED radiating device which comprises a base plate, a finned radiator, a miniature pump, a fan and a liquid delivery tube. An inlet and an outlet which are used for being communicated with the liquid delivery tube are formed in two ends of the base plate, the liquid delivery tube is communicated with the miniature pump and the finned radiator and is filled with cooling liquid, the miniature pump provides power for the cooling liquid to form a circulating circuit, the fan is arranged below the finned radiator, the base plate is filled with porous media, and the finned radiator is free of location limitation and can be placed at a required position according to actual conditions. The novel high-power LED radiating device has the advantages that LED heat can be transferred by the aid of characteristics of large contact area and high heat transfer rate of the porous media, the miniature pump provides the power for the cooling liquid to form the circulating circuit, the flow rate of the liquid can be changed, and accordingly the LED heat can be radiated under the control.

The invention discloses a radiation control system for a computer, which comprises a first temperature sensor, a second temperature sensor, a third temperature sensor, a first wind speed sensor, a second wind speed sensor, a third wind speed sensor, an A / D (Analogue to Digital) converter, a singlechip microcomputer, a first wind speed adjusting module, a second wind speed adjusting module, a third wind speed adjusting module and a communication module. According to the invention, radiation of a CPU, a power supply and a display card among a computer hardware which generate greater heat in high speed operation is accurately controlled in real time, so that temperatures of the CPU, the power supply and the display card are controlled within a stable range, therefore, the operating speed and performance of the computer are ensured.

The invention provides a temperature control system and an electric vehicle and relates to the technical field of temperature monitoring. The temperature control system is applied to the electric vehicle. The electric vehicle comprises a motor and a battery. The temperature control system comprises an air cooling device, a heat storage box and a monitoring device, wherein the air cooling device isused for absorbing heat produced by the motor during working; the heat storage box is used for storing a liquid substance and connected with the air cooling device through a pipeline to store heat absorbed by the air cooling device through the liquid substance; the monitoring device comprises a controller, a first temperature sensor and a first control valve, the controller is connected with thefirst temperature sensor and the first control valve, the first temperature sensor is arranged on the battery, and the first control valve is arranged on a pipeline connected with the heat storage boxand the battery. With the adoption of the arrangement, the problem of low energy utilization rate of existing electric vehicles can be solved.

The invention discloses a battery module assembly, which comprises battery modules and conducting strips, wherein the conducting strips are used for leading out positive electrodes and negative electrodes of the battery modules; the conducting strips are arranged at end parts of the battery modules; the battery module assembly also comprises heat exchange plates; the heat exchange plates are provided with heat exchange passages capable of circulating heat exchange mediums; the heat exchange passages are provided with inlets and outlets; the heat exchange plates and the conducting strips are arranged in parallel along a longitudinal direction of the battery modules and further make contact in a heat conduction manner. In the battery module assembly, the heat exchange plates are correspondingly arranged for the conducting strips; the temperature drop or the temperature rise can be carried out on the heat exchange plates through the heat exchange mediums circulated on the heat exchange plates; further, the temperature drop or the temperature rise can be carried out on the battery module through the heat exchange plates and therefore, the battery module assembly can be used for effectively solving the problem that a battery module assembly is poor in heat radiation effect.

The invention provides an electric drive fracturing pry lubricating system, a fracturing pry and a lubricating control method, and relates to the technical field of shale gas exploitation equipment. The electric drive fracturing pry lubricating system is used for injecting lubricating oil into a to-be-lubricated device. The electric drive fracturing pry lubricating system comprises a lubricating pump, a power end oil tank, a temperature control flow divider valve and a heat dissipation module. A pump inlet end of the lubricating pump communicates with a power end oil tank, and a pump outlet end of the lubricating pump communicates with a valve inlet of the temperature control flow divider valve. The temperature control flow divider valve comprises a first valve outlet and a second valve outlet, wherein the first valve outlet and the second valve outlet both communicate with a device to be lubricated. The heat dissipation module is arranged on a communicating pipeline of the second valve outlet and the device to be lubricated. According to the electric drive fracturing pry lubricating system, the fracturing pry and the lubricating control method, the temperature control flow divider valve controls the lubricating oil to directly enter the device to be lubricated for lubrication or to firstly dissipate heat according to the temperature of the lubricating oil, so that waste of heat dissipating capacity is prevented; and the lubricating oil enters the device to be lubricated to lubricate at a better temperature and state, so that the lubricating effect is improved.

The invention relates to a cabinet charging method, and the method comprises the steps: firstly searching the electric quantity value of each power bank in a cabinet, and then carrying out the sortingof a plurality of power banks in the cabinet based on a preset priority sequence; and finally, charging the preset number of power banks with the highest priority with a first current value based onthe sorting. The priority sequence comprises that the priority sequence of the power banks of which the electric quantity values are lower than a first preset value is higher than the priority sequence of the power banks of which the electric quantity values are higher than or equal to the first preset value. According to the cabinet charging method, the multiple power banks stored in the cabinetare graded according to different electric quantities, it is preferentially guaranteed that the electric quantities of the multiple power banks in the cabinet reach the borrowable index, and the heatdissipation problem is effectively controlled while the charging efficiency is improved. The invention further relates to a cabinet adopting the charging method.

A sensor unit for measuring a mass flow rate of a liquid hot-melt adhesive is disclosed. The sensor unit includes a flow channel for the hot-melt adhesive, a first temperature measurement device positioned at a first position in the flow channel, a second temperature measurement device positioned at a second position in the flow channel and a heating device assigned to the second temperature measurement device, and a control unit for controlling the heating device and for measuring the mass flow rate. The controller is configured to adjust the temperature of the heating device assigned to the second temperature measurement device to a value, to determine the heating power for heating the heating device assigned to the second temperature measurement device, and to calculate the mass flow rate in the flow channel. The first and second temperature measurement devices are arranged substantially parallel to each other in the flow channel.

The invention discloses a temperature control digital display heat radiation seat, which comprises a base, a main control module, a power supply conversion module, a temperature collection controller, a temperature regulation module and a digital display, wherein the bottom of the base is provided with a heat radiation window, a semiconductor refrigerator and a heat radiation fan are arranged on the heat radiation window in an embedded way, and the semiconductor refrigerator, the heat radiation fan, the power supply conversion module, the digital display and the temperature collection module are respectively and electrically connected with the main control module. The temperature control digital display heat radiation seat has the advantages that the structure is simple, the design is novel, the temperature collection module can collect the temperature around the base, then, the main control module precisely controls the work of the semiconductor refrigerator and the heat radiation fan, the function of controlling the heat radiation of the base is reached, and meanwhile, the temperature display can also be realized through the digital display.

Disclosed are intermediate-hydration-heat composite cement and a preparation method thereof, which relate to the field of a building material. The composite cement comprises the following components, by mass: (1) 40.0-55.0% of portland cement clinker, (2) 10.0-20.0% of aluminate cement clinker, (3) 2.1-8.0% of nanometer tin oxide, (4) 5.0-15.0% of glass fiber, (5) 5.0-10.0% of silica fume, (6) 5.0-10.0% of struvite, and (7) 2.5-5.0% of gypsum. The preparation method of the intermediate-hydration-heat composite cement comprises: (1) material preparation, (2) grinding, (3) pre-mixing, and (4) powder grinding. The intermediate-hydration-heat composite cement provided in the invention is prepared by utilizing both characteristics of the portland cement clinker and the aluminate cement clinker; the early strength and long-term strength of the materials are improved via a synergistic effect among each component; the hydration heat is effectively reduced; and affects of hydration heat on the molding and properties of the cement are avoided.

The invention discloses a novel permanent magnet motor capable of dissipating heat which comprises a case, a permanent magnet motor body is arranged on the right side of the interior of the case, thepermanent magnet motor body is fixedly connected with the bottom end of the interior of the case through a mounting frame, a rotating shaft is arranged on the left side of the permanent magnet motor body, and the rotating shaft is fixedly connected with an output shaft of the permanent magnet motor body. According to the novel permanent magnet motor capable of dissipating heat, through cooperationof the case, the permanent magnet motor body, the rotating shaft, the through hole and the heat dissipation mechanism, the rotating shaft can rotate during operation of the permanent magnet motor body, and the conical cylinder can rotate along with the rotating shaft in the process; because the rubber tube on the inner surface of the groove block is pressed against the outer wall of the conical cylinder, the groove block and the fan blade can be rotated together with the conical cylinder during the rotation, gas circulation can be generated on the outer side of the permanent magnet motor bodyin the case in the rotating process of the fan blades, and heat dissipation can be conducted on the permanent magnet motor body in the running period.

The invention relates to drilling equipment for oil exploration and with a good heat dissipation effect. The drilling equipment comprises two vertical columns, a fixed rod horizontally arranged between the two vertical columns, and a drilling mechanism arranged on the fixed rod. Auxiliary fixing mechanisms are arranged under the vertical columns. In the drilling equipment for oil exploration and with the good heat dissipation effect, guide sleeve pipes are arranged under the vertical columns in a sleeving mode, and then supporting of the vertical columns is achieved through a horizontal fulcrum bar and a fixed column. When relative displacement occurs to the guide sleeve pipes and the vertical columns, due to the fact that the teeth on a strip-shaped tooth mesh with a driving gear, rotation of the driving gear is achieved, heat dissipation of a heat dissipation fan to a motor is controlled, and the heat dissipation effect of the drilling equipment is improved. In addition, in a work power circuit, the characteristics that a transformer core is high in use ratio, power voltage is high in use ratio, output power is large, base electrodes of two triodes are both low levels, and a driving circuit is simple are achieved, and thus the practical value of the drilling equipment is increased greatly.

The embodiment of the invention provides a method and system for controlling heat dissipation of a server cabinet, a readable storage medium and equipment, and relates to the technical field of server heat dissipation, and the method comprises the steps: determining a current to-be-detected target server cabinet; obtaining the temperature of the target server cabinet and the room temperature of a machine room where the target server cabinet is located; according to the temperature of the target server cabinet and the room temperature of the machine room, under the condition that it is determined that a heat dissipation device of the target server cabinet needs to be started, determining target power according to the temperature of the target server cabinet and the room temperature of the machine room; and controlling a heat dissipation device of the target server cabinet to dissipate heat of the target server cabinet according to the target power. According to the embodiment of the invention, the communication capability and computing power of the cloud platform are utilized, the temperature of the server cabinet and the room temperature of the machine room are comprehensively considered, the heat dissipation device of the server cabinet is controlled to carry out heat dissipation at the adaptive power, heat dissipation of the server cabinet is reasonably guaranteed, and waste of electric power resources is avoided.

An induced voltage suppression device for use in a traffic signal controller is located along a lamp drive circuit (24) of a traffic light. The device includes a low impedance element (16) and an independently controllable switching element (12) able to disconnect the low impedance element from the circuit at any time.

The invention relates to a filtering detection-type electronic control safety advertisement light box. A temperature detection result in an advertisement light box body (1) is obtained in a real timebased on a first filtering circuit (13) through application of a temperature sensor (5) in the built-in advertisement light box body (1). According to the temperature detection result, electronicallycontrolled telescopic rods (8) in each group of electric drive windows (3) are synchronously controlled, and the closing and opening of each hollow window (12) on the top surface of the advertisementlight box body (1) through each barrier plate (7) are achieved, and heat control is achieved; at the same time, through application of a smoke sensor (6) in the built-in advertisement light box body (1), based on a second filter circuit (14), a temperature detection result in the advertisement light box body (1) is obtained in a real time, and for open flame, through the closing of the hollow window (12), combined with control of a design of an electronic control valve (10), water-spraying fire fighting operations are achieved in a closed space, and stability and safety of practical application can be effectively guaranteed.

The invention belongs to the technical field of grinding machines, and provides an unequal-diameter three-roller grinding machine which comprises a rack, a feeding roller, an intermediate roller and a discharging roller, wherein the diameters of the feeding roller, the intermediate roller and the discharging roller are not completely the same or are completely different; the larger the diameters of the rollers are, the higher the linear speeds of the relative movements of the roller surfaces are; the axis connecting line between the feeding roller and the intermediate roller as well as the axis connecting line between the middle roller and the discharging roller are in a V shape; the diameter of the intermediate roller is larger than that of the feeding roller and that of the discharging roller, and the diameter of the discharging roller is larger than that of the feeding roller; and or the diameter of the intermediate roller is smaller than that of the feeding roller and that of the discharging roller, and the diameter of the discharging roller is smaller than that of the feeding roller. The diameters of the three rollers are set to be different; the larger the diameters are, the higher the linear speeds of the speed surfaces are, so that the linear speed difference among the rollers can be increased, the material grinding shear force can be improved, and the grinding effect can be improved; and through the rollers arranged in a V shape and the special design of unequal diameters, materials can be subjected to heat dissipation or heat preservation in the grinding process.

The invention discloses an adaptive temperature control chip microsystem. The adaptive temperature control chip microsystem is constructed by bonding front sides of a main working chip and a micro-electro-mechanical system chip, wherein the main working chip comprises a first group of bonding pads which is arranged on the front side of the main working chip; and the micro-electro-mechanical system chip comprises a second group of bonding pads which is arranged on the front side of the micro-electro-mechanical system chip and corresponds to the first group of bonding pads, and a groove which is formed in the front side of the micro-electro-mechanical system chip and is used for constructing an enclosed liquid flow channel for heat transfer fluid to flow in the front side of the main working chip in order to cool the main working chip. According to the adaptive temperature control chip microsystem, the groove is formed in the front side of the micro-electro-mechanical system chip, and constructs the enclosed liquid flow channel for the heat transfer fluid to flow together with the front side of the main working chip in order to dissipate heat of the microsystem. Furthermore, a temperature sensor is arranged for detecting a temperature, and a control valve is adjusted according to the detected temperature in order to control a flow rate of the heat transfer fluid, so that control of heat dissipation is realized.

The present invention relates to a mobile-phone-assisted heat-dissipation device, pertaining to the technical field of mobile phone devices. The device comprises a substrate of a mobile phone shell. The substrate is matched with the mobile phone. The substrate is provided with a central processing unit and a plurality of thermoelectric heat-dissipation modules used for performing heat dissipationon the mobile phone, and the thermoelectric heat-dissipation modules are connected with the central processing unit. The mobile phone shell of the device can effectively control the heat dissipation of the mobile phone by controlling the thermoelectric heat-dissipation modules and improve the safety by detecting the temperature in real time. The device can avoid the existing noise problem in the conventional mobile phone heat-dissipation shell. The mobile phone shell has the advantages of compact structure, reasonable design, convenience in processing and assembling, relatively low cost and new heat-dissipation mode for the mobile phone.

The invention provides a charging system, a heat dissipation device and a control method thereof. The heat dissipation device comprises a connecting assembly which is provided with a first connectingport and a second connecting port, a heat dissipation assembly, a control unit, which is connected with the connecting assembly and the heat dissipation assembly. When the first connecting port is connected with charging equipment and the second connecting port is connected with electronic equipment, the control unit obtains information sent by the electronic equipment and / or the charging equipment through the connecting assembly. The heat dissipation process of the heat dissipation assembly is controlled according to the information sent by the electronic equipment and / or the charging equipment; therefore, heat dissipation of the heat dissipation device can be adjusted in real time by monitoring the electronic equipment and / or the charging equipment, the heat dissipation effect is effectively improved, heat dissipation is conducted on the electronic equipment through the heat dissipation device, the charging power of the electronic equipment can be improved, and the charging speed andthe charging efficiency are improved.

The invention discloses a hydraulic system of an amphibious vehicle. The hydraulic system comprises a hydraulic oil tank and a plurality of track driving branches. Each track driving branch comprises a gear pump, a control valve and a track rotating mechanism, and the hydraulic oil tank outputs hydraulic pressure to the track rotating mechanisms after sequentially passing through the gear pumps and the control valves. The track rotating mechanisms are driven by the hydraulic pressure to drive the track to rotate. The control valve is used for receiving a signal of the whole vehicle controller to be opened and closed. Each gear pump is connected with an engine, and the engine outputs power to drive the corresponding gear pump to rotate. The hydraulic system of the amphibious vehicle has the advantages that the hydraulic system is adopted to drive the track to rotate, safety and reliability are achieved, meanwhile, the whole vehicle operation power is provided in the way of the track and wheels, and the device can be better adapted to various responsible driving working conditions. And meanwhile, hydraulic heat dissipation control is achieved through hydraulic heat dissipation, heat dissipation of oil can be effectively controlled, and it is guaranteed that the temperature of the oil hydraulic system is kept at a safe position.

The invention provides a temperature control system and an electric vehicle and relates to the technical field of temperature monitoring. The temperature control system is applied to the electric vehicle. The electric vehicle comprises a motor and a battery. The temperature control system comprises an air cooling device, a heat storage box and a monitoring device, wherein the air cooling device isused for absorbing heat produced by the motor during working; the heat storage box is used for storing a liquid substance and connected with the air cooling device through a pipeline to store heat absorbed by the air cooling device through the liquid substance; the monitoring device comprises a controller, a first temperature sensor and a first control valve, the controller is connected with thefirst temperature sensor and the first control valve, the first temperature sensor is arranged on the battery, and the first control valve is arranged on a pipeline connected with the heat storage boxand the battery. With the adoption of the arrangement, the problem of low energy utilization rate of existing electric vehicles can be solved.

The invention discloses an environmental protection monitoring system. The environmental protection monitoring system comprises a housing part, a box part, and an electric part; the box part is arranged in the housing part; the top of the housing part is provided with a heat radiation layer; two side rails are arranged at the bottom of the internal part of the housing part; the two sides of the bottom of the housing part are provided with slide wheels; the front part of the box part is provided with a connecting transverse plate; the connecting transverse plate and the box part are provided with a lock; the electric part is provided with an external power supply, a breaker, a transformer, a first time relay, a first alternating current contactor, a second time alternating current contactor, a second time relay, an instrument contact, a third alternating current contactor, and a water pump. According to the environmental protection monitoring system, cooperation of the time relays and the alternating current contactors is achieved, so that start and stop of the water pump are controlled, and operation time is controlled; water supply of a sampling system is carried out at preset time, and instrument equipment normal operation is ensured; and in addition, the heat radiation layer and the slide wheels are adopted, so that device convenience is ensured.