15results about How to "Solve local overheating problems" patented technology

This invention provides an active heating method and system for a two-dimensional turntable servo mechanism, belonging to the field of laser communication technology. The method includes acquiring the feedback temperature and motor torque of the azimuth or pitch axis; when the motor torque is zero and the difference between the feedback temperature and the preset temperature is outside the preset temperature range, heating is performed by determining a first heating power based on the first d-axis current and the electrical control angle; when the motor torque is not zero and the difference between the feedback temperature and the preset temperature is outside the preset temperature range, heating is performed by determining a second heating power based on the second d-axis current and the q-axis current, until the temperature difference returns to the preset range and heating stops. This invention utilizes the heat generated by the motor's own current to replace external heating devices, achieving uniform heating from within, effectively reducing deformation and frictional torque fluctuations in key moving parts caused by temperature gradients, and improving the turning table's pointing accuracy and thermal stability under extreme temperature changes.

The application relates to the technical field of powder coating, in particular to a powder coating suitable for laser curing and a preparation method and application thereof. The powder coating for laser curing comprises the following components in parts by weight: resin, curing agent and heat-conducting agent, and other components; the mass ratio of the resin, the curing agent and the heat-conducting agent is 50-90:510:510; the heat-conducting agent is selected from two or more of graphene oxide, nano-aluminum oxide, carbon nanotubes, aluminum nitride and hexagonal boron nitride. The powder coating for laser curing of the application has excellent surface gloss, flatness and substrate adhesion after laser curing, and has good chemical corrosion resistance, and can realize a curing effect equivalent to that of current conventional thermal curing, and has significant application value in the fields of decoration and protection.

This utility model discloses a heat dissipation cabinet for a generator excitation control device, comprising: a cabinet body, several partition components, and a heat dissipation component. The cabinet body is provided with an air inlet and an air outlet communicating with the interior. The several partition components are sequentially and spaced apart inside the cabinet body along the ventilation direction from the air inlet to the air outlet, dividing the inner cavity of the cabinet body into multiple sequentially arranged heat dissipation ducts. Each partition component forms an air guide between itself and the inner wall of the cabinet body, and each air guide is alternately arranged on different sides of the cabinet body along the ventilation direction. The heat dissipation component is installed inside the cabinet body and corresponds to the heat dissipation ducts, used to drive airflow from the air inlet to the air outlet in a directional manner. This device can ensure that the airflow is evenly distributed inside the cabinet body, avoid local overheating problems, significantly improve heat dissipation efficiency, and improve the operational stability and reliability of power electronic equipment such as generator excitation control devices.

The heat dissipation support capable of adjusting the wind direction angle of the fan comprises a machine case assembly, a control assembly, an adjusting assembly and a heat dissipation assembly, the control assembly is arranged on the inner side wall of the machine case assembly so that a machine case can be controlled conveniently, and the adjusting assembly is arranged on the inner side wall of the machine case assembly so that the fan can be adjusted conveniently. The heat dissipation assembly is arranged on the inner side wall of the case assembly to facilitate heat dissipation of the interior of the case, the adjusting assembly comprises a fixing frame and an adjusting support, the fixing frame is arranged on the inner side wall of the case assembly, the adjusting support is arranged at one end of the fixing frame to facilitate adjustment of the fixing frame, and the adjusting support and the fixing frame are combined to facilitate adjustment of the interior of the case. And the blowing angle of the fan is flexibly adjusted. A user can dynamically adjust the direction of the fan and accurately cover a high-temperature area according to hardware load distribution in the case, so that the problem of local overheating caused by a fixed fan is avoided, the air circulation efficiency is remarkably improved, and the frequency reduction or downtime risk caused by overheating of hardware is effectively prevented.

The utility model relates to a multi-working-condition spraying type liquid cooling device and mobile equipment, the multi-working-condition spraying type liquid cooling device comprises an evaporation section, a condensation section, a mounting bracket and a spraying adjusting mechanism, the evaporation section is provided with an evaporation cavity, a power element is mounted on the bottom wall of the evaporation cavity through the mounting bracket, and the power element and the evaporation cavity are arranged at an interval; the spraying adjusting mechanism comprises a controller, a liquid pump, a connecting pipeline, a power supply, a liquid level sensing element and nozzles, and the liquid pump is arranged in the evaporation cavity and connected with the nozzles distributed around the power element through the corresponding connecting pipeline. And the controller controls the liquid pump to start, and enables the nozzle at the corresponding position to spray the liquid working medium towards the position, exposed out of the liquid level, of the power element. According to the multi-working-condition spraying type liquid cooling device and the mobile equipment provided by the invention, the problem that a power element is easily subjected to dry burning or overheating due to sudden acceleration change generated by the mobile equipment in operation is solved.

The invention discloses a non-contact electromagnetic energy storage heating device and a heating method, and relates to the field of crude oil treatment. According to the non-contact electromagnetic energy storage heating device and the heating method, a heat accumulator, a high-temperature circulating fan, an electromagnetic heating unit and a crude oil heat exchange device are arranged, the high-temperature circulating fan conducts airflow circulation among the heat accumulator, the electromagnetic heating unit and the crude oil heat exchange device through pipelines, and heat storage and heat release are achieved through circulating airflow; heat is generated through electromagnetic induction, the heating speed is high, the heat efficiency is high, a hot airflow circulation heating mode is adopted to replace a traditional resistance wire close-fitting heating mode, heating is uniform, no dead angle exists in temperature conversion, and the problem of local overheating of the heat accumulator can be solved; the size of the device is greatly reduced, the structure of the heat accumulator is simplified, and the electric leakage risk of the heat accumulator is effectively eradicated.

This invention relates to the field of fuel cell technology and discloses a fuel cell heat dissipation system and control method for active balancing heat dissipation in unmanned aerial vehicles (UAVs). The fuel cell heat dissipation system includes a UAV heat dissipation assembly and an active balancing control subsystem. The UAV heat dissipation assembly includes a liquid cooling circuit and rotors disposed at the tips of multiple heat dissipation arms. The liquid cooling circuit includes coolant channels disposed inside the multiple heat dissipation arms. The coolant channels include in-arm liquid inflow pipes and in-arm liquid return pipes. Multiple in-arm liquid inflow pipes are arranged close to the inner side of the heat dissipation arms, and the multiple inflow pipes converge at the tips of the heat dissipation arms and connect to the in-arm liquid return pipes. The inflow pipes have an S-shaped variable diameter pipe structure, and their arrangement density gradually decreases from the root to the tip of the heat dissipation arm. The active balancing control subsystem includes a sensor group, an actuator group, and a controller. This invention can improve the reliability and flight safety of the UAV thermal management system.

The utility model belongs to sulfonylurea production technical field discloses a kind of production device of sulfonylurea, including reaction kettle main body, and the inside of reaction kettle main body has hollow interlayer;Spiral heat exchange mechanism, spiral heat exchange mechanism includes by concentric arrangement inner spiral guide vane and outer spiral cooling pipe, and the rotation direction of inner spiral guide vane and outer spiral cooling pipe is opposite;Dispersion mechanism, dispersion mechanism includes with the vertical and rotation installation drive shaft of reaction kettle main body, and drive shaft is driven by drive motor mounted on reaction kettle main body, and three layers of dispersion disc are installed on drive shaft, and inner spiral guide vane is welded to the inner wall of reaction kettle main body, and the inclination angle of inner spiral guide vane is 45 °, and the plate height of inner spiral guide vane is one sixth of reaction kettle main body diameter.The utility model not only can realize dynamic strengthening heat exchange, but also can guarantee the efficiency of mass transfer in high viscosity stage, while it can solve the problem of local overheating caused by sulfonation heat release.

The utility model relates to the technical field of electric blankets, and discloses a multi-layer protection full-effect safety electric blanket which comprises two insulating layers, the opposite faces of the two insulating layers are provided with installation grooves, the inner walls of the two installation grooves are provided with heating wires, the two insulating layers are bonded together through glue, and the heating wires are arranged in the installation grooves. The two insulating layers are made of polyimide films and used for wrapping the heating wire, the fireproof flame-retardant layers are arranged on the upper surfaces and the lower surfaces of the two insulating layers, the two insulating layers are wrapped together through the fireproof flame-retardant layers, the fireproof flame-retardant layers are made of flame-retardant needle-punched non-woven fabrics or aramid fibers, and the fireproof flame-retardant layers can be rapidly carbonized and stop burning when meeting open fire. And a wear-resistant layer is arranged on the lower surface of the lower fireproof flame-retardant layer, the wear-resistant layer is formed by alternately weaving cotton and linen fibers, through the synergistic effect of multiple layers of materials, the electric blanket achieves full-effect safety protection of uniform heat conduction, water resistance, insulation, fire resistance and wear resistance, and the dual requirements of a user for comfort and safety are met.

The utility model relates to the related technical field of fermentation devices, in particular to a fermentation mixer for microbial fertilizer production, which comprises a base, a stand column is fixedly mounted on the upper surface of the base, a discharge hopper is fixedly connected to the upper end of the stand column, and a heat preservation layer is fixedly mounted at the upper end of the discharge hopper. An inner ring of the heat preservation layer is fixedly connected with an inner-layer tank body, a high-frequency electromagnetic coil is arranged on the surface of the inner side of the heat preservation layer, the upper end of the inner-layer tank body is sleeved with a sealing ring, the inner-layer tank body is connected with the sealing cover through the sealing ring, and a paraffin-based phase change material with the melting point being 55 DEG C is arranged in the heat preservation layer. Temperature fluctuation is accurately controlled through melting heat absorption and solidification heat release, compared with a traditional solid structure, thermal resistance is improved, extra heating or cooling equipment is not needed when an extreme temperature difference is coped, a high-frequency electromagnetic coil is matched for direct induction heating of the tank body, and the local overheating problem of resistance heating is avoided; and the problem of inactivation of low-temperature functional bacteria caused by out-of-control temperature in a high-temperature stage is solved.

The utility model discloses a multi-fan heat radiation type electric box structure, which relates to the technical field of electronic component heat radiation equipment, and comprises an electric box shell, a plurality of heat radiation fans, a plurality of heat radiation fans, a plurality of heat radiation fans, a plurality of heat radiation fans and a plurality of heat radiation fans, according to the utility model, the plurality of heat dissipation fans are distributed in a linear array, so that a large amount of external cold air can be quickly brought into the electric box, the air flow direction is changed in cooperation with the guide plate, the cold air uniformly covers the interior of the electric box, and the air flow channel constructed by the L-shaped structure increases the contact between the air flow and the electronic component, strengthens heat convection, takes away heat and ensures the stable operation of the electronic component; the guide plate accurately guides airflow to a heating area, airflow paths are adjusted according to distribution of electronic components, airflow waste is avoided, the problem of local overheating is effectively solved, the overall heat dissipation efficiency is improved, the telescopic sliding plate can drive the guide plate and the mounting plate to slide, and the electronic components on the mounting plate are easier to touch and convenient to check.

The utility model provides a novel sealing structure of a speed reducer, and belongs to the technical field of machinery. The problem that a traditional speed reducer is prone to dust invasion in the actual operation process is solved. The novel sealing structure of the speed reducer comprises a machine body and a motor installed on one side of the machine body, a fixing cover is installed on the motor, a motor shaft of the motor penetrates through the fixing cover and extends into the machine body, a transmission gear is arranged at the end of the motor shaft in a sleeving mode, and a transmission assembly is arranged in the machine body. The transmission gear is connected with the transmission assembly in a meshing connection mode and improves power of the transmission assembly. The speed reducer has the advantage that the sealing performance of the speed reducer is improved.

The invention discloses an oil-immersed reactor and a flexible direct-current power transmission system, and relates to the technical field of flexible direct-current power transmission. The oil-immersed reactor comprises six groups of reactance coils; multiple groups of reactance coils corresponding to multiple groups of bridge arms of the flexible direct current power transmission system are integrated, so that two groups of reactance coils corresponding to one group of upper and lower bridge arms form a two-arm two-phase integrated structure, and three groups of reactance coils corresponding to each group of upper bridge arms or each group of lower bridge arms form a single-arm three-phase integrated structure. By means of the two-arm two-phase integrated structure and the single-arm three-phase integrated structure, larger inductance is provided for a single phase, under the condition that the inductance requirement is not changed, the overall size and the occupied area of the reactor are remarkably reduced, and the power density and the space utilization rate of a system are improved.

The utility model provides a kind of power supply.Power supply includes shell and the blowing piece, radiator and at least two groups of function parts being arranged in shell.The outer side wall of shell is equipped with ventilation part.The blowing piece is located in the side of ventilation part.Radiator is located between ventilation part and blowing piece.At least two groups of function parts are respectively installed in the two sides of radiator, wherein, radiator is configured to heat dissipation heat generated by function part, blowing piece blows hot air of radiator to ventilation part.Compared with prior art, the utility model is installed in the two sides of radiator by at least two groups of function parts respectively, so that heat can be more evenly distributed on radiator, so that radiator can quickly heat dissipation heat generated by function part, avoid local overheating problem caused by function part concentrated arrangement.Blowing piece blows hot air in radiator to ventilation part, so that hot air can quickly, effectively flow from radiator to ventilation part, and discharge power supply through ventilation part, improve heat dissipation efficiency.

The invention provides a double-sided forced air cooling heat dissipation system for a direct-current charging pile liquid cooling gun, and belongs to the technical field of electric vehicle charging equipment. The system comprises a charging gun, a liquid cooling heat dissipation system and a double-sided heat dissipation cooling mechanism integrated in the liquid cooling heat dissipation system. The mechanism is mainly composed of a cooling pipe with cooling fins, an installation frame, a cooling fan and an exhaust fan, wherein the cooling fan and the exhaust fan are coaxially and oppositely arranged, and a penetrating type forced convection air channel is formed. The key lies in that a self-adaptive flow guide assembly is arranged on the air inlet side between the cooling fins, senses the temperature through a bimetal wave sheet, and drives a guide plate to form a V-shaped structure, so that air flow is dynamically restrained and guided to flow close to the surfaces of the cooling fins. The problems that a traditional liquid cooling gun heat dissipation system is limited in heat dissipation efficiency, large in size and weight and high in cost and lacks the capacity of optimizing airflow distribution in a self-adaptive mode according to heat loads are solved in a pure mechanical mode, and efficient, compact and reliable intelligent heat management is achieved.