124results about How to "Guaranteed cooling" patented technology

The invention discloses a method for controlling a sleep mode of an air conditioner. The method comprises the following steps of: performing indoor brightness detection through an optical sensor, and determining whether the air conditioner is in a sleep mode according to the brightness detection result; and detecting the indoor air temperature through an indoor air temperature sensor, and controlling the operating frequency of a compressor and the rotating speed of an indoor fan motor according to the difference between the indoor air temperature and the current temperature set by a remote controller. The room brightness intensity is detected, so that whether the air conditioner is in the sleep mode is judged, meanwhile the indoor air temperature is detected, the detection result is integrated according to the difference between the indoor air temperature and the current temperature set by the remote controller, the operating frequency of the compressor and the rotating speed of the indoor fan motor are intelligently controlled, low noise is realized, the refrigeration and heating effects are ensured, and a silent and comfortable sleep mode is realized.

The invention discloses a temperature-humidity double-control type air conditioner system and a control method thereof. The temperature-humidity double-control type air conditioner system comprises an indoor machine and an outdoor machine. The outdoor machine is provided with a first connector and a second connector. The indoor machine comprises an indoor throttle valve, a first heat exchanger, a second heat exchanger, a first solenoid valve, a second solenoid valve, a temperature detection module, a humidity detection module and a control module. The control module controls the temperature-humidity double-control type air conditioner system to enter the corresponding working mode by controlling the indoor throttle valve, the first solenoid valve and the second solenoid valve according to the indoor environment temperature and the indoor environment relative humidity. The working modes comprise a heating mode, a refrigerating mode and a temperature-humidity control mode. The temperature-humidity double-control type air conditioner system can meet the temperature-humidity double-control requirement without affecting the normal refrigerating and heating performance and fully meet the requirements of users.

The invention discloses a control method for a wall-mounted inverter air-conditioner. The control method comprises the steps: when a received air-conditioner control instruction is a refrigeration energy conservation and comfort instruction, and when the current room temperature is not lower than a preset room environment temperature threshold, the inverter air-conditioner is controlled to operate according to an original inverter control mode of the inverter air-conditioner; or else, a compressor target frequency calculated according to the original inverter control mode is obtained, and the compressor target frequency is judged to be smaller than a first preset compressor frequency or not; if yes, a compressor is controlled to operate with the first preset compressor frequency, and an outdoor fan is controlled to operate with a preset rotation speed; and if not, the compressor and the outdoor fan are controlled to operate according to the original inverter control mode. In the original inverter control mode, room temperature PID (Proportion Integration Differentiation) control or fuzzy control is performed on the compressor, and room temperature is compensated during room temperature PID control. By adopting the control method, the energy-saving performance and refrigeration comfort of the air-conditioner are improved.

The invention discloses a temperature humidity dual control variable refrigerant flow air conditioning system and a control method thereof, wherein the temperature humidity dual control variable refrigerant flow air conditioning system comprises multiple indoor units, an outdoor unit and a control module; the outdoor unit is provided with a first interface and a second interface; each indoor unit comprises an indoor throttle, a first heat exchanger, a second heat exchanger, a first solenoid valve, a second solenoid valve, a third solenoid valve, a temperature detection module and a humidity detection module; the control module controls the temperature humidity dual control variable refrigerant flow air conditioning system by controlling the indoor throttle valve, the first solenoid valve, the second solenoid valve and the third solenoid valve in each indoor unit. The temperature humidity dual control variable refrigerant flow air conditioning system and the control method thereof meet the temperature humidity dual control requirement without influencing normal refrigerating and heating performances, and fully meet user demands.

The invention relates to a gas-liquid component high chamber-pressure large-range variable working condition combustor which comprises a spray injector, a spray pipe and an electric spark igniter, wherein the spray injector comprises an oxidizing agent inlet pipe, a combustion agent inlet pipe, a gas-liquid bi-component nozzle, a spray injector panel and a combustion agent cavity, the gas-liquid bi-component nozzle comprises a throttle hole, the spray injector panel, an oxidizing agent direct flow nozzle and three combustion agent self-striking direct flow nozzles, wherein the oxidizing agent direct flow nozzle is arranged in the middle part of the gas-liquid bi-component nozzle and is provided with an opening in the center of the spray injector panel; the three combustion agent self-striking direct flow nozzles are arranged on the side wall of the oxidizing agent direct flow nozzle; the throttle hole is arranged between the oxidizing agent inlet pipe and the oxidizing agent direct flow nozzle; the combustion agent cavity is a liquid cavity surrounding the external circumference of the oxidizing agent direct flow nozzle; and a plurality of combustion agent direct flow nozzles are arranged on the spray injector panel. The invention solves the technical problems of low chamber pressure, low thrust and insufficient small-range variable working condition capability of the traditional gas-liquid component combustor, and relatively high residual oxygen coefficient in the center and relatively low residual oxygen coefficient in a circumferential direct flow nozzle region are realized.

The invention relates to the technical field of turning, and discloses a blade drilling device for an electric fan. The blade drilling device comprises a frame, a cooling box, a worktable, a work chamber and a fixture box, a drilling device positioned on the upper portion of the worktable is arranged on the frame, the cooling box is communicated with a liquid outlet pipe, the drilling device is fixedly connected with a fixing block, the work chamber and the fixture box are positioned on the lower portion and the upper portion of the worktable, the upper surface of the work chamber is providedwith a collection opening, a first piston plate is vertically and slidably connected into the work chamber, a first connecting rod is fixedly connected between the first piston plate and the fixing block, a second piston plate is vertically and slidably connected into the fixture box, the side wall of the fixture box is fixedly connected with a heating device, a pressing block is vertically and slidably connected onto the frame, a second connecting rod is fixedly connected between the pressing block and the second piston plate, a second one-way liquid outlet valve is arranged on the side wallof the work chamber, and a cooling pipe is communicated between the second one-way liquid outlet valve and the cooling box. The blade drilling device is used for drilling fan blades, and cooling liquid can be timely supplemented.

The invention discloses a casting method for ultra-large heavy-wall nodular iron castings, belongs to the technical field of casting on the ultra-large heavy-wall nodular iron castings, and aims at solving the technical problems that the requirement that solidification time of nodular iron shall not exceed 120 minutes cannot be met by the ultra-large heavy-wall nodular iron castings, and casting cavities are hard to manufacture due to the ultra-large heavy-wall nodular iron castings are huge in size. The casting method comprises a step of manufacturing a casting wood pattern, a step of manufacturing a cast iron cavity mould box of which the outer wall is provided with a heat dissipation wing by utilizing a mould box casting method by taking the casting wood pattern to which a pattern sheet is attached as a sand core, a step of filling the cast iron cavity mould box with wet pre-coated sand, a step of manufacturing a cast iron cavity mould box with a pre-coated sand layer and a step of mould closing and pouring. The wet pre-coated sand is adopted by the casting method disclosed by the invention, which is more conductive to manufacturing the cavities; moreover, the castings can be cooled more rapidly by utilizing the cast iron cavity mould box with the heat dissipation wing; and a self-heating iron pattern in a traditional pre-coated sand casting process is replaced with the wood pattern, so that manufacturing cost is greatly reduced, and the defect that the traditional pre-coated sand casting process only can be used for casting small castings is overcome.

The invention discloses a hybrid fiber recycled concrete crushing facility. The facility comprises a shell, a crushing device connected to the shell, a cooling cavity formed in the uppermost end of the interior of the shell, a crushing cavity formed below the cooling cavity, a smashing device arranged below the crushing cavity, an output device connected to the smashing device, two cooling devices arranged inside the cooling cavity and located on the two sides of the cooling cavity, a pushing device connected to the smashing device, and lifting devices connected to the pushing device and located on the two sides. The crushing device is arranged, and therefore the acting force which is borne by crushing components when the crushing components crush concrete can be reduced, and the service life of each crushing component is prolonged. The cooling cavity is arranged, so that the concrete is cooled before the concrete is crushed, and the brittleness of the concrete is improved. The cooling devices are arranged, and therefore cooling of the concrete can be kept when crushing operation is conducted for multiple times, and the crushing effect and the protection effect on the crushing components are better improved. The pushing device and the lifting devices are arranged so that repeated crushing of the concrete can be realized.

The invention discloses a superhigh-temperature heating system with fast response, belonging to the technical field of designing of heating devices. A heating device comprises a quartz tube, tube holders and a tube mounting seat, wherein the quartz tube is horizontally mounted on the tube mounting seat through the tube holders; two ends of the tube mounting seat are respectively connected with a water cooling pipeline used for cooling the tube mounting seat and the tube holders; an air-cooling pipeline is composed of an air inlet pipeline and an air outlet pipeline; the air outlet of the air inlet pipeline and the air suction port of the air outlet pipeline are respectively arranged on two ends of the quartz tube, and form cooling air flow near the wall of the quartz tube; and a non-contact temperature measuring system collects the surface temperature of the quartz tube and sending the data of the surface temperature to a fan control system, and the fan control system adjusts the flowrate of cooling air in the air-cooling pipeline. The superhigh-temperature heating system provided by the invention ensures cooling of the quartz tube and can avoid influence on the temperature fieldof a test piece; and the adoption of active cooling control technology can improve refrigeration efficiency and refrigeration precision.

The invention discloses a steam condensation device. The device comprises a cooling mixing cavity and a fan for accelerating steam cooling. The cooling mixing cavity is provided with an air inlet, anair outlet, a first steam inlet and a water outlet. The steam is guided into the cooling mixing cavity through the first steam inlet. The water outlet is formed in the bottom of the cooling mixing cavity, the fan is provided with an air suction port and an air outlet, cold air blown out of the air outlet completely enters the cooling mixing cavity through the air inlet to be mixed with the steam for cooling, and cooled gas is exhausted out of the cooling mixing cavity through the air outlet. According to the steam condensation device, steam condensate water can be conveniently recycled. The invention further discloses a cooking utensil.

The invention discloses a self-adapting frost-free refrigerator and relates to the technical field of refrigerators. The self-adapting frost-free refrigerator comprises a refrigerator body; a refrigeration box is fixedly connected to the top of the inner wall of the refrigerator body; a freezing box is fixedly connected between the bottom of the inner wall of the refrigerator body and the bottom of the refrigeration box; an air box is fixedly connected to the top of one side of the refrigerator body; a bottom box is fixedly connected to the position, located at the bottom of the air box, of one side of the refrigerator body; a control box is fixedly connected to the position, located at the bottom of the bottom box, of one side of the refrigerator body; and the left side of the inner wallof the air box is fixedly connected with a first exhaust fan through a support, and an exhaust port of the first exhaust fan communicates with an exhaust pipe. According to the self-adapting frost-free refrigerator, refrigerated objects can be blown to retain freshness, meanwhile vertical reciprocating blowing can be conducted, it is guaranteed that the refrigerated objects can be preserved for alonger time, meanwhile, energy consumption is reduced greatly, the cost is saved, and high-temperature air is cooled into cold air effectively; and meanwhile the self-adapting frost-free refrigeratoris quite convenient to use and can be overhauled quite conveniently and rapidly in the later period after a failure.

The invention discloses a temperature control device of an electric power dispatching worktable. The temperature control device is used for solving the problem that the service lives of computers are shortened due to excessively high internal temperatures of existing electric power dispatching worktables. The temperature control device is characterized in that an air inlet and an air outlet are formed in the inner wall of the electric power dispatching worktable, a dust filter is arranged in the air inlet, a Venturi tube is arranged in an inner cavity of the dust filter, and a first filter and a second filter are arranged at an air inlet end of the Venturi tube; a support is arranged in the middle of the Venturi tube, a third filter is rotationally mounted in an inner cavity of the support, a water absorption component is arranged on the third filter, air can flow through the water absorption component, a water tank is arranged at the bottom of the support and is filled with water, and fan blades are arranged on the third filter; a flow divider is arranged between the dust filter and computer hosts, a radiating tube is arranged in the air outlet, a plurality of air collecting tubes are arranged on the rear sides of the computer hosts and are communicated with a flow concentrating tube, and a hot-air outlet which is communicated with the radiating tube is formed in the flow concentrating tube. The temperature control device has the advantage that effects of effectively regulating and controlling the internal temperatures of the electric power dispatching worktable can be realized.

The invention discloses a fully enclosed construction enclosure. The fully enclosed construction enclosure comprises a support structure composed of stand columns and lattice columns, roof steel beams are fixedly arranged above the support structure, roof truss keels are fixedly arranged on the roof steel beams, transverse keels are fixedly connected between the stand columns and the lattice columns on the outermost side of the support structure, vertical keels are fixedly connected between the transverse keels, the support structure, the transverse keels and the vertical keels constitute the roof truss structure of the fully enclosed construction enclosure, fully enclosed outer sealing plates are fixedly connected on the outer side of the roof truss structure, and the enclosed outer sealing plates comprise a steel plate-crystal slab composite structure and a color steel rock wool composite plate-heat insulation decorative plate composite structure; carrier plates of transparent material are fixedly connected to the outer side of the roof truss keels; air exhaust equipment, entrances and exits are arranged on the enclosed outer sealing plates; and spraying ports are formed in the carrier plates, a vertical shaft mouth is formed in the fully enclosed construction enclosure, an electromagnetic pulse dust collector is arranged at the vertical shaft mouth, and a plurality of ventilation devices are arranged at a ridge formed by the carrier plates.

The invention provides a cooling device for a motor of a slicing machine, and belongs to the technical field of slicing machines. The cooling device for the motor of the slicing machine comprises a machine case and a motor positioned in the machine case, wherein the main case is rectangular; the front surface of the machine case is provided with a case door capable of being opened; the cooling device comprises a plurality of gas vents which are formed in the back of the machine case and are circulated with outside air; the outer side of the back surface of the machine case is provided with a rectangular baffle plate capable of sealing the gas vents; left and right side surfaces of the machine case are respectively provided with a gas outlet and a gas inlet; the outer side of the back surface of the machine case is fixed with a cooling water tank; the gas outlet and the gas inlet are connected by virtue of a cooling air tube; the cooling air tube is provided with a radiating section positioned in the cooling water tank; the gas outlet is provided with a fan I for blowing cold gas to the machine case; and the gas inlet is provided with a fan II for feeding hot gas to the cooling air tube. The cooling device has two cooling modes, and one cooling mode can be selected according to different temperatures, so that the cooling of the motor is guaranteed, the cost investment is reduced, and a higher use value is realized.

Provided is a temperature adjustable pig house. The temperature adjustable pig house comprises a pig house body, the pig house body comprises a roof, four-side walls and a base plate, one end of the four-side walls is connected to the roof, the other end is connected to the base plate, the base plate is arranged inside the ground, a control device, a temperature-and-humidity detection device and a spraying device are further arranged on the roof, and the spraying device and the temperature-humidity detection device are connected to the control device respectively, the temperature-humidity detection device comprises a temperature sensor and a humidity sensor which are connected to the control device respectively. The design of the control device and the temperature-and-humidity detection device achieves automatic control of the pig house.

The invention relates to a logging-while-drilling underground circuit semiconductor positive cooling system and method. The system comprises a shell and a multi-level semiconductor chilling plate arranged in the shell, wherein the semiconductor chilling plate comprises a first level semiconductor chilling plate, a second level semiconductor chilling plate and a third level semiconductor chilling plate; a hot end of the first level semiconductor chilling plate is connected with the shell through the first heat conducting plate, while a cold end is connected with a hot end of the second level semiconductor chilling plate through a second heat conducting plate; a cold end of the second semiconductor chilling plate is connected with a hot end of a third semiconductor chilling plate through a third heat conducting plate; and a cold end of the third level semiconductor chilling plate is connected with a underground circuit through a fourth heat conducting plate. The system has the advantagesthat 1, the temperature of the underground circuit is lowered by positive cooling of the semiconductor chilling plate instead of own passive cooling of an element; 2, an underground power generator is used for supplying power, so that the underground circuit can be cooled continuously, and the service life and stability of the underground circuit are prolonged and improved.

The invention discloses controlled rolling equipment for Q195 hot-rolled coiled plates, and relates to the technical field of controlled rolling for the Q195 coiled plates. The equipment comprises a supporting frame, wherein mandrels are rotationally connected to the inner side of the lower end of the supporting frame, a rolling wheel is fixedly connected to one end of each mandrel, a to-be-processed plate is in contact connection with the upper surface of the rolling wheel, a first guide pipe is fixedly mounted on the inner side of the upper end of the supporting frame, spray nozzles are fixedly mounted on the inner side of the lower end of the first guide pipe, a second guide pipe is fixedly mounted at the lower end of the supporting frame, an air outlet is formed in the upper end of the second guide pipe, and a collecting cover is fixedly mounted at the upper end of the supporting frame. The equipment has beneficial effects as follows: the spray nozzles spray water to cool the plate, produced water vapor can be absorbed by the collecting cover, line of sight is prevented from being affected by the water vapor, air motion at the bottom of the plate is accelerated, the cooling effect of the plate is better, and the to-be-processed plate is limited by a limit plate and is prevented from deflecting in a conveying process.

The invention discloses a safe and energy-saving cooking utensil. The steam generator comprises a body, a pot body and a steam generator body arranged in the body. The pot body is placed in the body.The steam generator is communicated with the interior of the pot body to supply steam to heat food in the pot body. The safe and energy-saving cooking utensil is characterized in that a steam condensing device which is communicated with the pot body to condense steam is also arranged in the body. The steam condensing device comprises a cooling mixing cavity, and a fan for accelerating the steam cooling. The cooling mixing cavity is provided with an air inlet, an air outlet, a first steam inlet and a water outlet. The steam is introduced into the cooling mixing cavity through the first steam inlet. The water outlet is formed in the bottom of the cooling mixing cavity. The fan is provided with an air suction port and an air outlet. The cold air blown out of the air outlet enters the coolingmixing cavity through the air inlet to be mixed with steam for cooling. The cooled air is exhausted out of the condensing device through the air outlet. The water outlet is directly or indirectly communicated with the steam generator to heat condensed water to form steam. The cooling effect can be guaranteed, and the cooling efficiency is improved.

The invention discloses a chip removing and cooling device for a scraping roller machine and a scraping roller machine. The chip removing and cooling device for the scraping roller machine comprises a pedestal, a chip removing unit, a toothed magnetic separator, a first control unit, a filter, a refrigerator, a back oil box and a second control unit, wherein the chip removing unit is arranged on the pedestal and is used for receiving a mixture of scrap iron generated by the scraping roller machine and a coolant, and preliminarily filtering the scrap iron with larger volume, and the toothed magnetic separator is arranged on the pedestal and is used for receiving the coolant preliminarily filtered by the chip removing unit and filtering thin scrap iron; the first control unit is connected with and control the chip removing unit and the toothed magnetic separator, and the filter is arranged on the pedestal and is used for receiving the coolant filtered by the toothed magnetic separator and precisely filtering the coolant; the refrigerator is arranged on the pedestal and is used for receiving and cooling the filtered coolant; and the back oil box is arranged on the pedestal and is used for receiving and collecting the coolant output by the refrigerator, and the second control unit is connected with and controls the refrigerator. The chip removing and cooling device for the scraping roller machine and the scraping roller machine can improve the filter precision of the coolant and effectively reduce the temperature of the coolant.

The invention discloses a heat dissipation device applied to an air conditioner controller. The air conditioner comprises an outdoor heat exchanger and an indoor unit. The heat dissipation device comprises a first heat exchange pipeline and a second heat exchange pipeline communicated with the first heat exchange pipeline, the first heat exchange pipeline is in heat conduction connection with theoutdoor heat exchanger, and the second heat exchange pipeline is in heat conduction connection with the air conditioner controller; condensate water of the air conditioner indoor unit flows into the first heat exchange pipeline, absorbs heat from the outdoor heat exchanger and then flows into the second heat exchange pipeline to cool the air conditioner controller. The invention further disclosesa control method for the air conditioner, a control device, the air conditioner and a readable storage medium. Thus, the temperature of the air conditioner controller is reduced so as to improve the refrigeration effect of the air conditioner.

The aerosol generating product comprises an integrated outer tube (1), and an aerosol generating substrate (6), a plugging piece (2), a cavity structure (3) and a filtering piece (4) which are positioned in the outer tube (1), the plugging piece (2) comprises a pipe wall (21) and a pipe cavity (22), the pipe wall (21) is of a groove corrugated structure and comprises an outer layer (211), an inner layer (212) and a groove corrugated layer (213) located between the outer layer (211) and the inner layer (212), the outer surface of the plugging piece (2) is limited by the outer layer (211), and the pipe cavity (22) is limited by the inner layer (212); a gathering sheet bar (221) is arranged in the pipe cavity (22). In the smoking process, the gathering sheet bar shrinks after being heated to block part of the middle airflow, so that more aerosol is in contact with aroma enhancing substances and / or fuming substances on the groove corrugated layer (213), and the effects of aerosol aroma supplementing and smoke amount increasing are further improved.

The invention discloses a battery cooling system and a battery cooling control method. The battery cooling system is used for cooling a battery, and comprises a refrigeration loop, a cooling piece, athrottle valve, an observation piece, an HVAC assembly, a thermostatic expansion valve with a cut-off function, and a controller. A refrigerant is introduced into the refrigeration loop. A cooling piece is arranged on the battery. The throttle valve is arranged between the first outlet and the second inlet and used for adjusting the flow of the refrigerant entering the cooling piece. The observation piece is arranged between the throttle valve and the second inlet and used for observing the state of the refrigerant flowing out of the throttle valve. The HVAC assembly is used for cooling the passenger compartment. And the thermostatic expansion valve is arranged between the first outlet and the third inlet, and is configured to cut off the flow channel between the first outlet and the thirdinlet when the temperature of the passenger compartment is lower than a preset value. The battery cooling system can improve the cooling efficiency of the battery and has high safety.

The present invention provides a psyctic capacity, belonging to temperature adjuster, the aim of the invention is to resolve the problems of poor energy consumption and temperature reducing effect exist in the outdoor capacity temperature reduction of vehicle etc by utilizing present air conditioner technology, including at least capacity body having a top panel, the capacity body has at least one panel of the external surfaces attached with the water absorbing steaming layer, the water absorbing steaming layer is connected with an automatic water supplying device, the automatic water supplying device includes a checking unit of water quantity, a checking controller of water quantity connected to the checking unit of water quantity, a water supplying device connected to the checking controller of water quantity, the invention is used for all capacity of outdoor temperature reduction, such as inner of vehicle, outdoors barracks, outdoors case etc.

The invention discloses a control method of a wall-mounted type air conditioner. The control method comprises the steps that when a refrigeration energy-saving comfort instruction is received and the current indoor temperature is not smaller than an indoor environment temperature threshold value, the air conditioner runs according to an original frequency converting control mode; if not, the compressor target frequency calculated out according to the original frequency converting control mode is obtained, and whether the compressor target frequency is smaller than the first set compressor frequency or not is judged; if yes, a compressor is controlled to run according to the first set compressor frequency, and an outdoor fan is controlled to run at the set rotating speed; and if not, the compressor and the outdoor fan are controlled to run according to the original frequency converting mode. In the original frequency converting control mode, indoor temperature PID control or dual PID control comprising coil pipe temperature PID control is executed on the compressor, the coil pipe target temperature adopted in coil pipe PID control is determined according to the indoor real-time humidity, and compensation is carried out on the indoor temperature in indoor temperature PID control. By applying the control method, the energy saving and refrigeration comfort of the air conditioner are improved.

The invention relates to the field of fiber communication, and relates to a multifunctional photoelectric composite cable cross connecting cabinet. The multifunctional photoelectric composite cable cross connecting cabinet comprises a box body, wherein from top to bottom, the box body is internally provided with an air exhaust area, an equipment unit installation area, an intelligent box type light split installation area, an intelligent melt distribution module installation area, a tail fiber parking area, and a photoelectric composite cable stripping area in sequence, a cable feeding passageis arranged at one side of the interior of the box body, and a fiber through passage is arranged in the middle of the box body. Compared with the prior art, the multifunctional photoelectric composite cable cross connecting cabinet has clear function areas, supports installation of an intelligent box type light splitter and an intelligent melt distribution integrated support tray, and can outputa wiring user end of high core number while realizing non jumper connection and low loss transmission so as to make the equipment extended intelligently; good air exhaust system balances internal temperature; an advertisement screen is configured through a box door, a power part of the advertisement screen is connected with inward distribution equipment, so that additional economic value is created for operators by advertising.

The invention relates to a grain reserve bin, in particular to a grain reserve bin temperature control system. The grain reserve bin temperature control system comprises temperature control equipmentarranged at one side of the reserve bin, wherein an air outlet pipe and a return pipe are connected to the temperature control equipment, the air outlet pipe and the return pipe are both arranged transversely around the inner wall of the reserve bin, a plurality of branch air outlet pipes which extend longitudinally are arranged at intervals on the air outlet pipe, a plurality of branch return pipes which extend longitudinally are arranged at intervals on the return pipe, and the branch air outlet pipes and the branch return pipes are distributed at intervals. The grain reserve bin temperaturecontrol system has the advantages that cooling of one side close to sunlight in a high-temperature season can be prevented, the situation that a local temperature difference is excessively large in the reserve bin can be avoided, and grain deterioration can be prevented.

The embodiment of the invention discloses agricultural machinery maintenance equipment and a maintenance method based on big data. The equipment comprises a lifting supporting device and an oil pumping device; the lifting supporting device comprises a rectangular base, four vertical oil cylinders and a supporting plate; an anti-rolling device is mounted at the bottom end of the supporting plate; an observation through groove is formed in the center of the supporting plate; an inclined lapping plate is hinged to the right end of the supporting plate; the oil pumping device comprises an oil storage tank and an air pump; and an oil level control device and an oil suction pipe are respectively arranged on the left and right sides of the oil storage tank. The method comprises the following steps of driving or hoisting a to-be-maintained agricultural machine to maintenance equipment and fixing, lifting the agricultural machine to a proper maintenance position, establishing an agricultural machine fault analysis and evaluation library, and enabling an operator to repair the agricultural machine according to the maintenance scheme. The lifting supporting device facilitates ascending and descending of the agricultural machine, the maintenance comfort degree is improved, maintenance equipment has the functions of solving oil way blockage, detecting the dynamic operation and static flameout states of the agricultural machine, detecting whether tires leak air or not and the like, and the maintenance efficiency is improved.

The invention relates to a valve arrangement structure for the cylinder head of an air-cooled diesel engine. The air inlet passage and the air outlet passage on the cylinder head of the diesel engine are respectively arranged on the two sides opposite to the cylinder head; the axial direction of the crankshaft of the diesel engine is the same as an air inlet / outlet direction; the central connecting line between an air inlet valve arranged on the air inlet passage and an air outlet valve arranged on the air outlet passage and the axial direction of the crankshaft are obliquely staggered to form an included angle; the cylinder head is provided with a plurality of cooling air passages, wherein a left cooling air passage runs through a left entity of the air outlet valve; a right cooling air passage runs through a right entity of the air inlet valve; an intermediate cooling air passage runs through an entity between the air inlet valve and the air outlet valve; and the air inlet end of the cooling passage corresponds to the air guide cover arranged on the diesel engine. By the valve arrangement structure for the cylinder head of the air-cooled diesel engine, the central connecting line between the air inlet valve and the air outlet valve and the axial direction of the crankshaft are obliquely staggered to form the included angle, the peripheries of the air inlet valve and the air outlet valve can be effectively cooled, not only the isostatic movement of the air inlet valve and the air outlet valve can be ensured, the performances of the diesel engine are improved, but also the integral cooling effect of the cylinder head can be improved.

The disclosure relates to an unmanned aerial vehicle that is characterized in that the unmanned aerial vehicle comprises a machine shell, a cabin is defined by the machine shell, the cabin is provided with a closed sub-chamber, a first ventilation opening and a second ventilation opening which communicate with the sub-chamber are formed in the machine shell, and a first cabin air opening and a second cabin air opening which communicate with the space outside the sub-chamber in the cabin are formed in the machine shell; besides, the unmanned aerial vehicle includes a first electronic component disposed in the cabin, a first heat dissipation assembly, and a second heat dissipation assembly; the first heat dissipation assembly comprises a heat dissipation structure and a first heat dissipation fan which are arranged in the sub-chamber, the heat dissipation structure is used for exchanging heat with the first electronic component, the first heat dissipation fan is used for enabling an airflow flowing through the heat dissipation structure to be generated in the sub-chamber, and the airflow enters from one of the first ventilation opening and the second ventilation opening and flows out from the other one; and the second heat dissipation assembly comprises a second heat dissipation fan arranged at the air opening of the first cabin, and the second heat dissipation fan is used for enabling the space outside the sub-chamber in the cabin to generate airflow.