620results about How to "Guaranteed cooling efficiency" patented technology

The invention discloses a refrigerator control method. The refrigerator control method includes the steps that the chamber temperature of a refrigerator is obtained at every preset time interval; whether the current chamber temperature is larger than the chamber temperature at the previous time point or not is judged, and whether the temperature difference between the current chamber temperature and the chamber temperature exceeds the preset temperature threshold or not is judged; if the current chamber temperature is larger than the chamber temperature at the previous time point and the temperature difference between the current chamber temperature and the chamber temperature exceeds the preset temperature threshold, the refrigerator is controlled to enter in a quick-freezing / quick-cooling mode; and the refrigerator is controlled not to execute the defrosting operation in the quick-freezing / quick-cooling mode, and the operating rotating speed of a compressor and the operating rotating speed of a fan of the refrigerator are adjusted to the designated rotating speed. The invention further discloses a refrigerator control device. By the adoption of the refrigerator control method and device, the working mode of the refrigerator is switched automatically according to the changes of the chamber temperature, and the convenience of control over the refrigerator and the quick-freezing / quick-cooling reliability are improved.

The invention provides a process nozzle and a system for gasifying water coal slurry. The process nozzle comprises a first oxygen channel, a water coal slurry channel, a second oxygen channel, a first cooling water jacket and a cooling water coil, wherein the first oxygen channel comprises a first oxygen channel inlet and a first oxygen channel outlet; the water coal slurry channel comprises at least one water coal slurry channel inlet and a water coal slurry channel outlet; the second oxygen channel comprises a second oxygen channel inlet and a second oxygen channel outlet; the first cooling water jacket comprises a first cooling water jacket inlet and a first cooling water jacket outlet; and the cooling water coil comprises a cooling water coil inlet and a cooling water coil outlet. The process nozzle is characterized in that: the first oxygen channel is positioned at the central position of the process nozzle; the water coal slurry channel is positioned between the first oxygen channel and the second oxygen channel and surrounds the periphery of the first oxygen channel; and the second oxygen channel surrounds the periphery of the water coal slurry channel. The process nozzle reduces the length of combustion flame more effectively, reduces the ablation of flame on a refractory brick, promotes the mixing and atomization of water coal slurry and oxygen and improves gasification efficiency.

The invention relates to a door body used for a cold storage and refrigeration device and the cold storage and refrigeration device. Particularly, the door body used for the cold storage and refrigeration device comprises a panel used for forming the front portion of the door body, a door liner used for forming the rear portion of the door body, two side frames used for forming the two side portions of the door body, a rear cover and a display control assembly. The rear cover is arranged between the panel and the door liner, and a containing cavity is defined by the rear cover and the panel. The display control assembly is arranged in the containing cavity. The two side frames are provided with through holes communicating with the containing cavity so as to form a heat dissipation channel transversely penetrating through the door body, air convective circulation is facilitated, heat is dissipated out in time conveniently, and accordingly the heat dissipation efficiency and effect of the display control assembly are ensured. The invention further provides the cold storage and refrigeration device. The cold storage and refrigeration device comprises a refrigerator body with a defined storage space and the door body, and the door body is directly or indirectly connected to the refrigerator body so as to open and / or close at least part of the storage space.

The invention discloses an air conditioner used in a high-temperature environment and a control method. The air conditioner comprises a compressor, a condenser, a first throttling valve, an evaporator, a refrigerant circulating pipe and a liquid refrigerant spraying loop pipe, wherein the compressor, the condenser, the first throttling valve and the evaporator are sequentially connected with one another end to end through a refrigerant circulating pipe, so that a closed refrigerant circulating channel is formed; one end of the liquid refrigerant spraying loop pipe is communicated with a refrigerant circulating pipe between the condenser and the throttling valve; and the other end of the liquid refrigerant spraying loop pipe is communicated with a refrigerant circulating pipe between the evaporator and the compressor. The liquid refrigerant spraying loop pipe is used for mixing liquid refrigerant flowing from the condenser with gas refrigerant evaporated by the evaporator so as to reduce the air suction temperature of the compressor. Along with reduction of the air suction temperature of the compressor, the temperature of a motor in the compressor is reduced, the air exhaust temperature of the compressor is also reduced, so that the compressor can stably work in the high-temperature environment, and the refrigerating efficiency of the air conditioner is greatly improved.

The invention discloses a computer case with a heat dissipation and purification function. The computer case comprises a base plate; the base plate is fixedly connected with the case through damping devices; a cooler is fixedly connected with one side of the bottom of the inner chamber of the case; one side of the cooler is fixedly connected with a cooling fan fixing rod; the cooling fan fixing rod is fixedly connected with a cooling fan through a cooling fan base; a dustproof ventilation opening is mounted at the position of one side of the inner wall of the case right corresponding to the cooling fan; the middle position of the base of the inner chamber of the case is fixedly connected with a water pump mounting table; a water pump is mounted on the top of the water pump mounting table; and the water pump is communicated with the cooler through a water inlet pipe. According to the computer case with the heat dissipation and purification function, a computer is displayed circularly, the problem that the dust in an existing case needs to be cleaned by a user is solved, the working safety of the computer is ensured through damping, and the relatively efficient work of the computer is ensured through utilization of a good heat dissipation system.

The invention discloses a refrigerator control method. The method includes the first step that temperatures of several compartments of a refrigerator are collected; the second step that working modes of the refrigerator are judged according to temperature change of the compartments, wherein the working modes include a conventional refrigeration control mode and a steady-state refrigeration control mode. When the refrigerator is in the conventional refrigeration control mode and at least one compartment among the several compartments requests for refrigeration, the refrigerator is controlled to carry out refrigeration until the several compartments meet refrigeration and halt conditions. When the refrigerator is in the steady-state refrigeration control mode and a refrigerating chamber requests for refrigeration, the refrigerator is controlled to carry out refrigeration until the several compartments meet refrigeration stop conditions. In the refrigerating process, the refrigeration frequency of the several compartments is not more than one. The refrigerator control method has the advantages of reducing refrigerator energy consumption, prolonging the service life of a compressor and guaranteeing the refrigeration efficiency of the refrigerator. The invention further discloses the refrigerator.

The invention relates to a wheel hub motor and a wheel hub motor heat dissipation system. The wheel hub motor comprises a motor shaft, a motor shell, a stator and a rotor; the motor shaft is fixedlyconnected with the suspension of a vehicle; the motor shell is rotationally assembled on the motor shaft; the motor shell comprises an axial end cover part; the stator is arranged in the motor shell and fixedly arranged on the motor shaft; the stator comprises a coil winding; and the rotor is fixedly arranged in the motor shell and surrounds the stator. The wheel hub motor further comprises a shell cooling channel; the shell cooling channel is arranged in the axial end cover part and is used for cooling the coil winding; the shell cooling channel is connected with an external liquid inlet channel and an external liquid outlet channel; and the external liquid inlet channel and the external liquid outlet channel are connected with a circulating liquid supply device so as to achieve circulating liquid supply cooling. It can be ensured that the wheel hub motor is always kept in a normal temperature range, and the service life of the wheel hub motor is prolonged.

The invention discloses a radiating packaging structure of a semiconductor, which comprises a base plate, a frame, a radiating fin and a heat conducting interface material layer, wherein the base plate loads and is electrically connected with at least one chip; the frame is bonded to the periphery of the base plate; the radiating fin is provided with one bonding surface bonded to the frame, the bonding surface is additional provided with one heat conducting area, and the heat conducting area is provided with a barrier wall to surround and form a material limiting space; and the heat conducting interface material layer is arranged in the material limiting space. The chip is provided with a radiating surface stretching into the material limiting space. The heat conducting interface material layer is located between the heat conducting area of the radiating fin and the radiating surface of the chip. The material limiting space is used for preventing the overflow, voids or other defects of the heat conducting interface material layer during high-temperature manufacturing.

The invention relates to a high-pressure radiator of an external type bypass pressure release valve. The high-pressure radiator comprises an oil cooler, and further comprises a motor for driving the fan to work, wherein a fan cover is mounted at the front end of the oil cooler; a fan is mounted on the inner part of the fan cover; a mesh enclosure is mounted on the fan cover; a bypass pressure release valve is mounted at an oil inlet connector of an end enclosure of the oil cooler; an oil inlet is formed in the top of the bypass pressure release valve; the bypass pressure release valve is connected to an oil tank through a pipeline; and a one-way valve is mounted on the pipeline. The high-pressure radiator is compact and reasonable in structure, and is convenient to operate; the bypass pressure release valve is additionally arranged on the outer part of the radiator, so that when inner oil pressure of the radiator is tooth high, the bypass pressure relief valve works for conveying oil back into the oil tank through the pipeline, and therefore, the using reliability of the radiator is greatly improved, the working efficiency is improved, and the radiating efficiency is guaranteed.

The invention discloses a full-automatic two-water-temperature water boiler. The full-automatic two-water-temperature water boiler comprises a heat insulation box body, a heating box, a heat exchange box, a warm boiled water storage box and a preheated water storage box, wherein the heating box, the heat exchange box, the warm boiled water storage box and the preheated water storage box are located in the heat insulation box body; an electric heater with a temperature controlled switch is arranged in the heating box; the temperature of boiled water in the heating box is lowered after heat exchange through the heat exchange box, then the boiled water enters the warm boiled water storage box, meanwhile, the temperature of cooling water in the heat exchange box is increased after heat exchange, then the cooling water enters the preheated water storage box, and when the liquid level in the heat box is lowered, the preheated water in the preheated water storage box enters the heating box. The full-automatic two-water-temperature water boiler can provide boiled water and warm boiled water with the temperature being 50-70 DEG C; and a mechanical device is adopted by the full-automatic two-water-temperature water boiler for replacing an electronic control device, thus, the reliability of the whole system is higher, the expansion coefficient of used gas or volatile solvents is high, cooling of the boiled water and preheating of cold water are achieved through the siphoning effect, electric energy and heat energy are saved, and the potential safety hazards caused by electricity usage are avoided.

The invention discloses a method and device for controlling a water cooled converter power cabinet and a water cooled converter adopting the method and device. A heat exchanger of the water cooled converter is indirectly controlled to be started and stopped through the master control system of a wind power system, and the difference value between the temperature of the environment inside the power cabinet and the water output temperature of the water cooled converter is controlled below a preset temperature difference corresponding to current humidity. When circulating water temperature is low, the heat exchanger is not started, and therefore a condensation phenomenon caused by the too low circulating water temperature is avoided. When the circulating water temperature is too high, the heat exchanger is indirectly started through the master control system, part of heat of circulating water is discharged out, the temperature of the circulating water is reduced, and therefore cooling efficiency is guaranteed. Therefore, on the premise that the control system of a wind turbine generator does not need to be improved and a water cooling system does not need to be provided with a heating device, dehumidification and condensation preventing control over the power cabinet is achieved, and control cost is greatly lowered.

The invention provides a projector (1) which comprises optical components arranged inside a sealed structure with an annular ventilation path, and a circulating fan (72) for cycling the air in the ventilation path. The sealed structure comprises a optical component used case body (46) with a inlet for air to flow inside and an outlet for air to flow outside; a plurality of air duct components used for leading air into the optical component used case body (46) and leading the air which flows out of the case body into the optical component used case body (46) again; and a cooling device (71) with thermoelectric conversion components. The cooling device (71), the circulating fan (72) and the optical component used case body (46) are sequentially arranged in the ventilation direction in the ventilation path. The air duct component (73) arranged at the front part of the ventilation path in the air duct components is made of a material with the thermo-conductivity less than or equal to 0.9W / (m*K).

The invention discloses an air conditioner control method. The method comprises the steps that when the air conditioner is in a self-cleaning mode, the air conditioner is controlled to operate for refrigeration, and condensation and frosting of the air conditioner are completed; after frosting on the surface of a heat exchanger is completed, the air conditioner is controlled to operate for heating; after the surface of the heat exchanger is defrosted, an ambient temperature and a coil temperature of the heat exchanger are acquired; and according to the coil temperature and the ambient temperature, the rotation speed of a fan of the heat exchanger is adjusted. The invention further discloses an air conditioning control device, the air conditioner and a readable storage medium. The inventionaims to improve the efficiency of the fan cooling heat exchanger in the self-cleaning process of the air conditioner and reduce the energy loss.

The invention discloses a computer case with cooling and purification functions. The computer case comprises a baseboard, wherein the baseboard is fixedly connected with a case through a damping device; one side of the inner bottom of the case is fixedly connected with a cooler; one side of the cooler is fixedly connected with a cooling fan fixing rod; the cooling fan fixing rod is fixedly connected with a cooling fan through a cooling fan base; a dustproof ventilation opening is formed in a position, corresponding to the cooling fan, at one side of the inner wall of the case; the middle position of the inner base of the case is fixedly connected with a water pump mounting platform; a water pump is mounted at the top of the water pump mounting platform; and the water pump is communicated with the cooler through a water pipe. The invention relates to the technical field of computer hardware. According to the computer case with the cooling and purification functions, the problem that dust in existing cases need to be cleaned by users is solved, the working safety of the computers and the stability during the work are ensured via damping, and more efficient work of the computers is ensured via a favorable cooling system.

The invention relates to the technical field of control cabinets, in particular to a control cabinet with good heat dissipation performance. The control cabinet comprises a cabinet body in which a partition plate is arranged. A top plate is arranged between the right end of the partition plate and the cabinet body. A second cooling mechanism is arranged on the top of the top plate. A number of placement plates are arranged below the top plate. A heat dissipation box is arranged at the bottom of the bottommost placement plate. A ventilation pipe passing through the cabinet body is arranged on the right side of the heat dissipation box. A first cooling mechanism is arranged below the heat dissipation box. A cooling mechanism is arranged on the left side of the partition plate. Through the setting of the first cooling mechanism and the second cooling mechanism, the temperature of the air in the cabinet body and the air entering the cabinet body from the outside can be reduced on the basisof the original ventilation pipe, and the heat dissipation effect is greatly enhanced. Through the setting of a snakelike bend pipe, the water after heat exchange can be cooled again, and the coolingeffect of the second cooling pipe is ensured. The electrical cabinet has a good heat dissipation effect, and dust and rainwater can be prevented from entering the electrical cabinet.

The invention provides a control method of refrigeration equipment with an inverter compressor. The control method comprises the following steps that when the refrigeration equipment is electrified, self checking is performed; if the self checking is passed, a noise reduction mode is started to control the inverter compressor to operate at a first preset rotating speed, and whether a rapid cooling mode or rapid freezing mode request signal is received or not is detected; if the rapid cooling mode or rapid freezing mode request signal is received, the refrigeration equipment is controlled to operate in a rapid cooling mode or rapid freezing mode, and the rotating speed of the inverter compressor is increased; after the refrigeration equipment refrigerates in the rapid cooling mode or rapid freezing mode, the refrigeration equipment enters a normal operating mode, wherein when the inverter compressor operates at the first preset rotating speed, noise generated by the inverter compressor is less than a preset value. By using the control method of the embodiment of the invention, the refrigerating efficiency of the refrigeration equipment can be guaranteed, the noise of the inverter compressor can be effectively reduced, customer complaints are avoided, and the market competitiveness of the refrigeration equipment (such as refrigerators) is improved.

The invention provides a cooling system for a vehicle, with functions of automatically exhausting gas in a cooling loop and replenishing water. The cooling system comprises a large circulating pipeline, a small circulating pipeline and an expansion water tank that are connected with an engine water jacket, wherein the engine water jacket is provided with a water replenishing hole and an exhaust hole, the water replenishing hole is communicated with the expansion water tank through a water replenishing pipe, and the exhaust hole is communicated with the expansion water tank through an exhaust pipe. By adopting the technical scheme provided by the invention, blockage due to dead regions of parts, gasification of a cooling liquid at high temperature, and gas brought in by expelling high-pressure gas outside the cylinder gasket or injecting the cooling liquid of the engine cooling system can be effectively eliminated, thus heat radiating efficiency of the engine cooling system is ensured. Meanwhile, the expansion water tank of the cooling system has a water replenishing function, loss of the cooling liquid can be immediately made up, and reliability of a cooling and heat-radiating system is improved.

The invention relates to an automatic dedusting air conditioner outdoor unit and belongs to the field of electric appliances. The outdoor unit comprises an outdoor machine, a heat dissipating board mounted at the outer side of the outer machine, a heat dissipating fan mounted on the heat dissipating board, a controller and a signal receiver, wherein a positive rotation controller, a reverse rotation controller, a direction change controller, a timer, a signal receiver and an alarm are arranged on the controller. The automatic dedusting air conditioner outdoor unit provided by the invention has the beneficial effect that through the inverted operation of the heat dissipating fan in the air conditioner outdoor unit, dust deposited at heat dissipating fins and other places can be cleared away, thus the refrigeration efficiency is ensured; the alarm is arranged, failure can be reported in time; and the air conditioner outdoor unit does not need to be manually cleaned, therefore resources and time are saved.

The invention discloses a computer mainframe with the dustproof and heat dissipation functions, and relates to the technical field of computers. The computer mainframe comprises a box, a first partition plate is fixedly connected between the top and the bottom of the inner wall of the box, a second partition plate and the third partition plate are fixedly connected between the left side of the first partition plate and the left side of the inner wall of the box in sequence from top to bottom, a motor is fixedly connected with the top of the second partition plate, a turbine is arranged on the surface of an output shaft of the motor in a sleeving mode, a worm is rotationally connected to the right side of the top of the first partition plate through a bearing, a rotating rod is fixedly connected to the top of the worm through a coupling, and the end, far away from the second partition plate, of the rotating rod penetrates through the box and extends to the outside of the box. According to the computer mainframe with the dustproof and heat dissipation functions, the purpose of conducting dust prevention on the computer mainframe is achieved, the phenomenon that due to the fact that dust is sucked, the interior of the mainframe box is polluted is avoided, and meanwhile the phenomenon that due to the fact that charged dust is sucked, and the short circuit of a mainboard is caused is avoided.

The invention discloses a low-cost high-power electronic device packaging technology. The technology comprises the steps that a chip and flange for packaging a high-power electronic device are prepared, a thick gold layer or a gold-tin layer is manufactured on the back face of the chip, a nickel layer and a thin gold layer are plated on the surface of the flange in sequence, and the chip and the flange are in surface mounting through gold-silicon eutectic welding or gold-tin eutectic welding. According to the low-cost high-power electronic device packaging technology, the thick gold layer or the gold-tin layer is manufactured on the back face of the chip, and the thin gold layer is plated on the surface of the flange, so that the good effect of gold-silicon eutectic welding or gold-tin eutectic welding is achieved, the void content of a hot interface layer between the chip and the flange is reduced, the radiating efficiency of the chip is ensured, the gold plating cost in the packaging technology is greatly reduced, and the number of working procedures is reduced.

The invention relates to a lump sugar cooling system. The lump sugar cooling system is characterized by comprising a sugar feeding mechanism, a cooling barrel supporting frame and a cooling barrel. According to the lump sugar cooling system, a roller type structure with meshes is adopted and an air channel is additionally arranged in the cooling barrel; a rotary cooling manner is adopted so that the system can be used for preventing lump sugar from being stuck together in a cooling process and also can be used for removing residual sugar dust in the lump sugar; the cooling efficiency of the lump sugar is ensured and the residual sugar dust in the lump sugar can also be removed to improve the quality of a lump sugar packaging process.

The invention relates to an air fryer stable in control. The air fryer comprises a base and a cover body hinged to the base. A fyer assembly is arranged in the machine base. The fryer assembly comprises an inner pot. A hot air assembly is arranged in the cover body, the hot air assembly comprises an air guide plate, a fan and a heating piece. The fan and the heating piece are positioned below theair guide plate; a transparent visual window is arranged on the cover body, the center of the hot air assembly deviates from the center of the fryer assembly, the distance between the center of the hot air assembly and the hinge center is smaller than the distance between the center of the fryer assembly and the hinge center, and the visual window surrounds the hot air assembly and is located above the inner pot. The hot air assembly is far away from a user relative to the fryer assembly, the area of the visual window located on one side of the user is enlarged, and therefore the user can visually observe the interior of the fryer assembly through the visual window. Meanwhile, the heights of the cover body and the whole air fryer can be effectively reduced, the gravity centers of the coverbody and the whole air fryer are reduced, and when the cover body is opened or closed, the whole air fryer is stably operated.

The invention relates to a flexible microwave ablation needle under an ultrasonic endoscope. The flexible microwave ablation needle comprises a handle, a radio-frequency coaxial connector and a microwave radiating antenna, wherein the radio-frequency coaxial connector is arranged on the handle, the radio-frequency coaxial connector is connected with the microwave radiating antenna through a radio-frequency coaxial cable, the periphery of the radio-frequency coaxial cable is provided with a capillary tube and an inner tube in sequence, the radio-frequency coaxial cable is arranged in the capillary tube, the capillary tube is arranged in the inner tube, the inner tube comprises a first end portion and a second end portion, the first end portion extends to the microwave radiating antenna, thesecond end portion keeps away from the microwave radiating antenna, and the inner tube is tapered off gradually from the second end portion to the first end portion. The ablation needle can reach more lesion sites and has strong penetrability.

The invention provides a portable cold insulation box. The portable cold insulation box comprises a box body. The box body is made of a heat insulation material. A containing chamber is formed in the box body and provided with an opening. The box body is provided with a sealing door used for sealing the opening. A cold insulation device is arranged on the box body and comprises a Stirling motor. The cold end of the Stirling motor is directly or indirectly in contact with the interior of the containing chamber so as to guide cold into the containing chamber. A power support is further fixed to the box body and used for fixing a power source. The power source is connected with the cold insulation device and used for providing electric energy for the cold insulation device. Carrying is convenient, meanwhile, a good protection function is achieved, and the cold insulation effect is guaranteed; and meanwhile, cold is provided for the Stirling motor through the power source, and the cold supply efficiency is guaranteed. The cold insulation box is convenient to carry, suitable for narrow occasions and suitable for domestic application or personal application.

The invention discloses a parallel loop heat pipe heat dissipation device used for heat dissipation of a server chip, which comprises a cooling box, N evaporators, N-1 three-way structure, N-section gas lines, N-section liquid line sand N-1 evaporation lines; N evaporators pass through the evaporation pipeline, a liquid line and a gas line are connecte in parallel to that cooling box; At that sametime, the first gas line extend into the cooling box, A loop of coil is formed inside that cooling box, A coil extends out of the cooling box and communicates with the liquid line of the first section, the N evaporator extends into the interior of the server and contact N chips and fixed with the N chips; The heat generated in the working process on the chip evaporates the liquid in the evaporator into gas, which is sent to the cooling box by the evaporation pipeline and the gas pipeline, and the cooling fluid in the cooling box is heat exchanged with the cooling fluid in the cooling box andcondensed into liquid, thereby realizing the chip heat dissipation, N >= 1. The invention simplifies the heat dissipation structure, improves the heat dissipation efficiency, and reduces the energy consumption cost and the potential safety hazard.

The invention relates to an Internet of things-based intelligent air cooling water cooler which comprises a main body, a base arranged below the main body, a heat dissipation opening formed in the upper part of the main body, an air feeding pipe arranged on one side of the main body and two water pipe fixing mechanisms arranged at the other end of the main body, wherein a display screen, a switch and a plurality of operation buttons are arranged on the main body. According to the Internet of things-based intelligent air cooling water cooler, after a water pipe is fixed through fastening units in clamping plates, a shrink unit is used for realizing connection between the water pipe and a water pipe connection opening, so that the flowing of condensed water is facilitated; due to the conical shape, the water pipe connection opening is applicable to connection with water pipes with any apertures; furthermore, a driving unit drives two air feeding units to introduce air, so that the air introduction volume of equipment within unit time is increased; therefore, the refrigeration efficiency of the water cooler is guaranteed, and the practicability of the equipment is improved.

The invention discloses a parallel-microchannel water-cooling base plate. The parallel-microchannel water-cooling base plate is characterized in that the baes plate comprises an upper aluminum plate body, a lower aluminum plate body, a cooling water inlet and a cooling water outlet; water-cooling channels are formed in the lower aluminum plate body; the upper aluminum plate body and the lower aluminum plate body are connected through MIG welding; the cooling water inlet is formed in the right sides of the upper aluminum plate body and the lower aluminum plate body; the cooling water outlet is formed in the left sides of the upper aluminum plate body and the lower aluminum plate body; and the cooling water inlet and the cooling water outlet communicate with each other through the water cooling channels.

The invention discloses an efficient heat dissipation gear speed reducer. The efficient heat dissipation gear speed reducer comprises a gear speed reducer body; a large gear and a small gear are arranged in the gear speed reducer body, and are engaged with each other; one side of the large gear is fixedly connected with an output shaft; the output shaft penetrates through the gear speed reducer body; the other side of the large gear is fixedly connected with a connecting shaft A; and one side of the small gear is fixedly connected with an input shaft. As the gear speed reducer body is effectively cooled, efficient work of the gear speed reducer body is guaranteed; a heat dissipation device is arranged at the lower end of a gear speed reducer mounting box without exposing outside, so that the heat dissipation device is not easy to be corroded by natural environment, the service life of the heat dissipation device is prolonged, and the maintenance cost is reduced; a slide rod is provided, and the position of a heat dissipation fan can be adjusted on the slide rod, so that heat dissipation in one area can be guaranteed, and the heat dissipation efficiency is preferably guaranteed; andthe up-down position of the slide rod is conveniently adjusted, so that the heat dissipation area can be adjusted, and excellent heat dissipation effect is guaranteed.