93 results about "Internal heat transfer" patented technology

The invention relates to the technical field of frequency converter heat dissipation, and discloses a generator set frequency converter heat dissipation structure which comprises a cabinet body, a sealing seat arranged at the top of the cabinet body, a detachable sealing cover arranged at the top of the sealing seat, a first convection window arranged at the top of the inner side wall of the cabinet body, and a second convection window arranged at the bottom of the inner side wall of the cabinet body. A detachable water-cooling heat exchanger or an air-cooling heat exchanger is arranged on the outer side wall of the cabinet body, a first convection cavity and a second convection cavity are formed in the positions, facing the outer side wall of the cabinet body, of the water-cooling heat exchanger and the air-cooling heat exchanger respectively, and the first convection window and the second convection window are communicated through the first convection cavity and the second convection cavity. Compared with the prior art, the device has the advantages that the internal heat transfer medium does not need extra power, the heat dissipation efficiency is high, contact with cooling water can be avoided, the air tightness is good, invasion of salt mist or dust is reduced, fluorinated liquid is allowed to serve as the internal heat transfer medium, and the phase change latent heat of the fluorinated liquid can be used for coping with high-temperature transient loads.

The invention relates to the technical field of rail transit, in particular to a brake disc connecting structure, a full-disc type brake device and a rail vehicle. In the brake disc connecting structure, a brake disc comprises a plurality of brake movable discs and a plurality of brake movable discs which are arranged at intervals, a core shaft is suitable for being connected with a braked power shaft, the core shaft is arranged at the axis of the brake disc in a penetrating mode, the core shaft is fixedly connected with all the brake movable discs and can synchronously rotate, and all the brake discs can enable the core shaft to brake the power shaft through mutual extrusion. Wherein a center plate is arranged in the mandrel, one end of the center plate is connected with the inner wall of the mandrel, and the other end of the center plate is connected with a braked power shaft. The brake disc connecting structure is simple in overall structure and easy to disassemble and assemble, so that the later maintenance cost is reduced; moreover, the brake disc connecting structure utilizes the center plate in the mandrel to realize internal heat dissipation of the mandrel, so that the internal heat transfer path of the mandrel is prolonged, the influence of dynamic heat energy on the motor bearing is effectively reduced, the service life of the motor bearing is prolonged, and the use safety of the motor bearing is improved.

The invention provides an energy-saving equipment data management method and system based on a block chain. A temperature sensor and an ultrasonic detection device are arranged, building wall surface heat radiation distribution, internal heat transfer coefficient change data and a pipeline three-dimensional heat loss positioning map are collected respectively, and a dynamic thermal performance data set is constructed in combination with the block chain technology. And performing spatial overlay analysis on the heat conduction path of the wall and the heat loss point of the pipeline, and identifying spatial correlation characteristics of the two. And meanwhile, based on an encrypted energy efficiency fluctuation event record uploaded by a block chain node, dynamic collaborative optimization of a thermal buffer compensation value, a pipeline correction coefficient and an energy efficiency compensation weight is realized through timestamp matching, and finally an intelligent instruction set is generated to regulate and control energy-saving equipment in a building in real time. According to the technical scheme, the comprehensive energy efficiency of the building energy-saving equipment is remarkably improved.

The invention relates to the field of food production equipment, in particular to stirring and pulping equipment for jam processing and a stirring method thereof.The stirring and pulping equipment comprises a pulping barrel and a shaft pipe, the shaft pipe is arranged in the pulping barrel, end covers supporting the shaft pipe to rotate are fixed to the two ends of the pulping barrel, and a crushing cutter is arranged in the middle section of the shaft pipe; and an air inlet assembly communicates with an opening in the outer end of the shaft pipe, a driving piece for supporting the shaft pipe to drive the crushing cutters to rotate is fixed to the outer side of the end cover, and the shaft pipe is of a hollow circular pipe structure. The mounting cover, the side pipe and the cutter body of the crushing cutter form an air passage, air is directly sprayed into materials through air holes densely distributed in the cutter body, a heat transfer path is shorter, jam can be directly contacted, processing heat can be rapidly taken away, and a booster fan structure can be formed without an additional driving part; integrated arrangement of pulping and cooling on the cutter body is achieved, energy consumption is reduced, and the equipment structure is simplified.

The invention relates to the technical field of heat exchanger design, and provides a supercritical LNG heat exchanger design method and system.The method comprises the steps that A, a wing-shaped fin spoiler is adopted to be installed in a PCHE channel, an internal spoiler structure matched with the channel is formed, and the heat transfer performance of a supercritical LNG mixed working medium is enhanced; b, by adjusting the heat transfer process of the mixed working medium in the channel, the heat transfer performance and the flow resistance of the mixed working medium in the channel of the PCHE are balanced; c, regulating and controlling operable parameters through a multi-objective numerical optimization technology so as to balance the channel internal heat transfer performance and flow energy consumption of the PCHE; wherein the operable parameters are used for directly regulating and controlling the heat transfer and flow process in the PCHE channel. According to the invention, the average wall temperature can be reduced by 2.24% through the wing-shaped fin structure, and the increase of the pressure drop in the PCHE channel is controllable.

The invention relates to a loop fixed bed reactor system, and relates to the technical field of chemical engineering, the loop fixed bed reactor system comprises a plurality of groups of primary loop reactors and a plurality of groups of secondary loop reactors, the primary loop reactors and the secondary loop reactors have the same structure, and the primary loop reactors and the secondary loop reactors are connected in series through reactor outlet pipelines; each primary loop reactor comprises a fixed bed reaction unit, a circulating pump and an external heat exchanger, the fixed bed reaction unit, the circulating pump, the external heat exchanger, an external heat exchanger inlet pipeline and the circulating pipeline assembly are communicated, and two or more groups of primary loop reactors and secondary loop reactors are connected in series through reactor outlet pipelines; through a forced circulation flow mechanism driven by the venturi gas-liquid mixer and the circulating pump, the problems of mixing mass transfer efficiency, internal heat transfer and retention time of a traditional fixed bed reactor are fundamentally solved, and exponential improvement of the mixing effect and the heat transfer effect is achieved through rapid circulation of the circulating pump and the venturi gas-liquid mixer.

The invention discloses a multi-path heat dissipation synchronous phase modulator cooling device convenient for stator assembly, and relates to the technical field of synchronous phase modulators, the multi-path heat dissipation synchronous phase modulator cooling device comprises a stator iron core, the outer end of the stator iron core is sleeved with a chip mounting heat dissipation shell, the rear part of the chip mounting heat dissipation shell is connected with a condensation box, the wall of the chip mounting heat dissipation shell is internally provided with a phase change medium accommodating cavity, and the phase change medium accommodating cavity is connected with the condensation box. A plurality of heat transfer fins are integrally formed and connected into the phase change medium containing cavity, and a plurality of ventilation holes are formed in the heat transfer fins. The sheet-mounted heat dissipation shell and the heat transfer fins are tightly attached to the stator core in all directions, the back of the stator core and the surfaces of the stator core laminations are in full contact with the sheet-mounted heat dissipation shell, and the heat transfer fins are provided with vent holes, so that the number of gas flow channels is increased, and the cooling efficiency of the device is remarkably improved; and the S-shaped condensation pipe with the air outlet holes is arranged, so that the introduced gaseous phase change medium can gradually flow out of the pipeline, the heat exchange area is indirectly increased, and the heat dissipation efficiency of the device is improved.

The utility model relates to the technical field of cables, and discloses a high-strength copper-core silver-plated special high-temperature cable, which comprises a conductor and further comprises a conductor shielding layer arranged on the outer side of the conductor, an insulating layer arranged on the outer side of the conductor shielding layer, and an insulating shielding layer arranged on the outer side of the insulating layer. The inner protection layer is arranged on the outer side of the insulation shielding layer, and an outer protection layer is arranged on the outer side of the inner protection layer; according to the utility model, fluoroplastic (such as PTFE and FEP) is used as the insulating layer, the long-term tolerable temperature can reach more than 200 DEG C, the chemical corrosion resistance is strong, the high-temperature resistance of the cable is improved, the high-temperature-resistant metal braid layer (such as tinned copper) is used as the outer layer to reinforce mechanical protection, the flexible silica gel is used as the inner layer to improve the bending resistance, and the service life of the cable is prolonged. Corrugated grooves are designed in the inner wall of the protective sleeve, so that the heat dissipation area can be increased; the heat conduction filling material boron nitride filling material is embedded in the protection sleeve so that internal heat conduction efficiency can be enhanced and heat radiation efficiency in the cable can be enhanced.

The utility model discloses a microwave hot air coupling heating device. The microwave hot air coupling heating device comprises a box body, a conveying mechanism, a microwave heating mechanism and a hot air heating mechanism, the box body is provided with a feeding hole and a discharging hole; the conveying mechanism is installed in the box body and is configured to convey materials entering the box body from the feeding port to the discharging port to be discharged. The microwave heating mechanism is communicated with the box body and is used for emitting microwaves into the box body; the hot air heating mechanism communicates with the box body and is used for conveying hot air into the box body. According to the microwave hot air coupling heating device, the inside and the outside of the asphalt reclaimed material are simultaneously heated and dehumidified, so that the heating quality of the asphalt reclaimed material is ensured, the mass heat transfer efficiency in the asphalt reclaimed material is improved, and the problems of edge overheating effect and thermal runaway are avoided.

The invention provides a composite pole piece, a preparation method thereof and a secondary battery. The composite pole piece comprises a current collector and a coating arranged on the surface of at least one side of the current collector, the coating is an alloy coating, and the preparation process of the composite pole piece comprises the following steps: sequentially smelting and cooling raw materials containing a nickel source, a titanium source, a molybdenum source, an aluminum source and a carbon source to obtain a first product; performing heat treatment on the first product to obtain a second product; carrying out atomization treatment on the second product to obtain a powdery third product; and coating at least one side surface of a current collector with the third product to form an alloy coating so as to obtain the composite pole piece. According to the invention, the functional shape memory alloy (SMA) is coated on the current collector as the thermal response coating, so that the purpose of adjusting the gap between the pole pieces in real time according to the temperature change is achieved, and the technical effects of optimizing the heat transfer path in the battery cell, reducing the risk of thermal runaway and improving the overall safety of the battery are achieved.

The utility model discloses a main load-bearing heat preservation unit for a polyimide film production line and a casting machine heat preservation box body formed by the main load-bearing heat preservation unit, the main load-bearing heat preservation unit comprises a main supporting frame body, the main supporting frame body comprises an outer-layer frame body, an inner-layer frame body and a main supporting frame connecting the inner-layer frame body and the outer-layer frame body, and the outer-layer frame body and / or the inner-layer frame body are / is composed of an outer sealing plate, a heat preservation plate and an inner sealing plate. And a hollow cavity structure is integrally formed. According to the main bearing heat preservation unit, a two-stage broken bridge heat insulation mode is adopted, and a cavity formed by plates is filled with heat preservation cotton, so that the inner side and the outer side of a wall plate of the box body are not in direct contact, the box body is divided into at least two different temperature sections, and internal heat is prevented from being transmitted to the outside to cause overheating of the outer surface of the box body; the inner-layer plate and the outer-layer plate simultaneously adopt an interlayer heat insulation mode containing a heat preservation layer, double-pole heat insulation is achieved, the overall mechanical property is better, cost is lower, and operation, installation and replacement are faster and more convenient.

The embodiment of the application provides a spiral pipe heat exchanger performance test method and system based on sensor data, relates to the technical field of heat exchanger performance test, and comprises the following steps: when the spiral pipe heat exchanger is in a normal running state, a disturbance signal that does not affect a production process is applied to a thermal fluid control parameter of the spiral pipe heat exchanger; temperature, pressure and flow data of fluid at an inlet and an outlet of the spiral pipe heat exchanger are synchronously collected; correlation analysis is performed on the disturbance signal and the temperature, pressure and flow data of the fluid, so that characteristic parameters of internal heat transfer and fluid flow instantaneous efficiency of the spiral pipe heat exchanger are obtained; according to the characteristic parameters and a preset thermodynamic model, contribution proportions of dirt in a thermal fluid channel and a cold fluid channel of the spiral pipe heat exchanger to heat exchange performance reduction are obtained; and according to the contribution proportions, an operation adjustment suggestion of the spiral pipe heat exchanger is generated. The application can prolong the service life of equipment and improve production efficiency and safety.

The embodiment of the invention discloses a battery thermal runaway and aging risk early warning method based on a battery digital twin model. One specific embodiment of the method comprises the following steps: acquiring operation state parameter information and environment parameter information of an energy storage battery; constructing and calibrating a battery digital twinborn model; based on the electrochemical sub-model, simulating electrochemical reaction and side reaction processes in the charging and discharging process of the battery; simulating an internal heat transfer process of the battery based on the operation state parameter information, the environment parameter information, the heat production quantity information and the heat conduction sub-model; based on the side reaction rate information, the battery internal temperature distribution information, the environmental parameter information and the gas generation and transmission sub-model, battery internal air pressure simulation processing is carried out; generating residual service life information of the battery; and executing battery thermal runaway and aging risk early warning based on the internal pressure distribution information, the battery internal temperature distribution information, the potential distribution information and the battery use residual life information. According to the embodiment, waste of early warning resources is reduced.

Valves that include a hollow valve stem with an internal heat transfer fluid that naturally circulates within the stem acts as a heat pipe to the valve bonnet to prevent fluid within the valve from freezing. This approach protects the valve body, stem, bonnet and sealing material such as valve packing or a bellows from being damaged by frozen fluid at any location within the valve.

The application provides a kind of energy storage battery thermal management unit, thermal management system and thermal management method, including the battery cell group consisting of multiple battery cells, internal heat transfer module, semiconductor thermoelectric sheet, external heat dissipation module, electronic control module and box, battery cell group, internal heat transfer module and electronic control module are all arranged in the box, external heat dissipation module is arranged outside the box, internal heat transfer module is in contact with battery cell, one side of semiconductor thermoelectric sheet is connected with internal heat transfer module, the other side is connected with external heat dissipation module.The beneficial effects of the present application are that a thermal management unit with reasonable structure and high stability is provided, which uses the combination of semiconductor thermoelectric sheet and thermal superconducting technology to exchange heat with battery cells, and then uses the external heat dissipation module to exchange heat with the semiconductor thermoelectric sheet, isolates the external heat dissipation module from the battery cells, ensures the heat exchange effect of the system, reduces the influence of the external heat dissipation module on the battery cells, and guarantees the safety and reliability of the system.

The invention discloses a device and a method for measuring internal heat transfer of an ablative material. The device comprises a flexible metal foil (1), a plurality of temperature sensors (2) arranged at intervals along the width direction of the metal foil (1), and an insulating layer (3) covering the metal foil (1) and the temperature sensors (2). The metal foil (1) is curled into a cylinder, a sensing point of the sensor (2) is located outside the cylinder, the cylinder is filled with the ablative material (4), and the whole body is embedded into a measuring hole of the ablative material body (5). The method comprises the steps of forming the measuring hole, arranging the sensor on the metal foil, performing insulation treatment, performing curl welding, filling the ablative material, performing embedded installation and the like. According to the invention, in-situ accurate measurement of longitudinal temperature distribution of the ablative layer is realized with minimum interference, and the problem of measurement of internal heat transfer of the ablative material is solved.

The invention discloses an internal and external independent circulation heat dissipation system for a high-protection-grade cavity of electrical equipment. The internal and external independent circulation heat dissipation system comprises a closed cabin with an IP protection grade and a heat dissipation unit arranged on the side wall of the cabin. The heat dissipation unit comprises a fan, an air inlet straight channel, an air outlet channel and a heat dissipation pipeline, the air inlet straight channel is communicated with the heat dissipation pipeline through an air inlet spiral pipeline, and the heat dissipation pipeline is communicated with an air outlet pipeline; through the multiple sets of heat dissipation units connected in parallel, airflow in the cabin is guided into the heat dissipation units through the draught fan, when the airflow enters the heat dissipation pipeline outside the cabin through the spiral structure, the vortex effect is generated so that the airflow can be accelerated, and the flowability of the airflow entering the heat dissipation pipeline can be improved; the spiral inner tooth structure of the heat dissipation unit can remarkably increase the contact area between hot air and the heat dissipation fins, and therefore the internal heat transfer efficiency is improved. Therefore, the overall heat dissipation performance can be optimized.

The invention discloses a design method of a thermal grid model and a thermal transfer equation of a multi-stage series rolling bearing, and relates to the field of engineering heat transfer science, the multi-stage rolling bearing comprises a first-stage bearing, a second-stage bearing and a third-stage bearing, the first-stage bearing and the third-stage bearing are composed of balls, an inner ring and an outer ring, the second-stage bearing is composed of a special bionic roller, a first-stage bearing outer ring and a third-stage bearing inner ring, a retainer is further arranged in the second-stage bearing, and the special bionic roller is movably embedded into the retainer. The invention provides a design method of a heat grid model and a heat transfer equation of a multistage series rolling bearing. The design method comprises the following steps: dividing temperature nodes; setting parameter codes; analyzing a heat transfer path in the bearing; constructing a multi-stage series rolling bearing thermal grid model; and establishing a heat transfer equation according to the heat grid model. The method is provided for the first time on the basis of a novel multi-stage series rolling bearing structure, and theoretical and engineering practice basis is provided for a novel multi-stage bearing heat grid model and a heat transfer equation design method.

The utility model discloses a vacuum drier capable of low-temperature outer furnace heating, and particularly relates to the field of vacuum dryers, the vacuum drier comprises a shell, the front end of the shell is fixedly connected with a low-temperature heating mechanism, the low-temperature heating mechanism comprises a protection box, the upper part of one side of the protection box is fixedly connected with a reinforcing plate, and the upper part of the other side of the protection box is fixedly connected with the reinforcing plate. And the middle part of the protection box is fixedly connected with a box body. A user pulls out a plug column from a liquid inlet in a liquid inlet pipe, the user pours heat conduction oil into the liquid inlet and enters an oil storage tank of a protection box, the two sides of a connecting plate are placed in sliding groove plates, meanwhile, the plug column is inserted into the liquid inlet in the liquid inlet pipe to be pressed, and open grooves in the two sides of the connecting plate correspond to threaded grooves; and finally, the threaded column is rotated into the threaded groove to penetrate through the interior of the open groove, a power source in the control box is started to start the heating assembly, heat conduction is conducted through internal heat conduction oil, heat preservation and heating can be better conducted on the materials, external low-temperature heating and heat preservation can be achieved, and limitation is reduced.

The present application provides a method and a system for generating the heat transfer amount of a shell-and-tube heat exchanger. The method includes the following steps: establishing an o-xyz three-dimensional coordinate system for the shell-and-tube heat exchanger, and obtaining a first regional division plan view generated according to the yoz plane and a second regional division plan view generated according to the xoz plane; positioning any heat exchange unit R(i, j, k) according to the first regional division plan view and the second regional division plan view; obtaining the heat transfer coefficient h(i, j, k), the heat exchange area a(i, j, k), and the heat transfer temperature difference Δt(i, j, k) for any heat exchange unit R(i, j, k); and calculating and generating the heat transfer amount of any heat exchange unit R(i, j, k) by using the following formula: The method and system for generating the heat transfer amount of the shell-and-tube heat exchanger of the present application can more accurately obtain the internal heat transfer amount parameters of the shell-and-tube heat exchanger.

This invention discloses a pipeline heating and insulation system and its usage method in extremely low temperature environments. The system includes a heating component, an internal insulation component, and an external waterproof component. By adopting an integrated structure that combines heating, insulation, and waterproofing, it not only achieves efficient control of pipe temperature and can more effectively cope with application environments with sudden temperature drops in polar regions, but also greatly improves the pipeline's resistance to water environments. During use, the waterproof component prevents external water from entering the device. Subsequently, the heating component generates heat by measuring and controlling the pipe wall temperature to maintain the pipe wall temperature within a safe range. Then, a low thermal conductivity nano-aerogel layer blocks internal heat transfer, greatly increasing the retention time of internal heat and thus improving the utilization rate of the heat generated by the heating component. In addition, by setting a heating wire winding tool, the uniformity of winding and construction efficiency are effectively improved, and the winding process is standardized.

The present invention discloses an oral cooling device (1000) for a user to control local cooling within the oral cavity. The oral cooling device comprises a distal region (100) placed in the oral cavity, a heat-transfer permeable outer layer (110), a proximal region (200) grasped by the user, a heat-transfer limiting outer layer (220), an internal heat transfer element (300), and an internal heat buffer (250). During use, heat is transferred from the oral cavity to the internal heat buffer (250) via the heat-collecting region (310) and heat-dissipating region (311) of the internal heat transfer element (300).

This invention relates to the field of phase change energy storage materials technology, specifically to a high-energy-storage composite phase change material for low-temperature applications and its preparation method. Addressing the problems of high supercooling, slow crystallization rate, and poor heat transfer performance in existing low-temperature phase change materials, this invention uses a glycylglycine aqueous system as the high-energy-storage matrix, introduces organic sugar alcohols as phase change temperature regulators, and constructs heterogeneous nucleation sites by adding inorganic nanoparticles. These nanoparticles significantly reduce the nucleation energy barrier of the system, effectively suppressing supercooling and improving the internal heat transfer efficiency of the material. The material obtained by this invention crystallizes rapidly and releases heat efficiently, making it widely applicable in cold chain logistics and food preservation.

The present invention discloses a method for synchronously estimating the thickness of thermally grown oxide and the thickness of defects in a thermal barrier coating, comprising: establishing a one-dimensional, unsteady, multi-layer coupled heat transfer equation set of heat conduction-radiation that describes the internal heat transfer mechanism of a thermal barrier coating system including a semi-transparent coating, a defect layer, a thermally grown oxide layer, a bond coat and a substrate layer under a high-temperature environment; solving the heat transfer equation set by using the finite volume method, and obtaining information on observables represented by temperature at the interior and surface of the thermal barrier coating system in combination with the determined boundary condition expressions; determining the observables and the inversion interval; determining an objective function required for synchronously estimating the thickness of the thermally grown oxide and the thickness of the defects based on the observables; obtaining measured values of the observables of the real system required for synchronously estimating the thickness of the thermally grown oxide and the thickness of the defects, and synchronously estimating the thickness of the thermally grown oxide and the thickness of the defects based on the inverse method; the present invention provides theoretical and technical support for non-destructive detection of internal defects and the like in thermal barrier coating materials in engineering practice.

The invention relates to the technical field of industrial silicon production, in particular to an efficient water vibration cooling method in industrial silicon production. Comprising the following steps: injecting a high-temperature silicon melt into a mold with a cooling water channel; applying multi-direction mechanical vibration to the mold, wherein the vibration direction comprises composite vibration in the vertical direction and the horizontal direction; circulating cooling water is synchronously injected into a cooling water channel of the mold, and the water flow direction and the vibration direction form a synergistic effect; the vibration frequency is controlled to be 1-500 Hz, the amplitude is controlled to be 0.1-5 mm, and the cooling water flow is controlled to be 10-200 L / min; heat transfer in the silicon melt is accelerated through the synergistic effect of vibration and cooling water, and the cooling time is shortened by more than 30%. The invention provides an efficient cooling method capable of realizing a multi-physical field synergistic effect and dynamically regulating and controlling process parameters so as to break through the cooling efficiency and quality bottlenecks in industrial silicon production.

The application relates to the technical field of wind power generation, in particular to a wind turbine element temperature adjusting method, device, equipment and program product. The method comprises the following steps: obtaining an expected temperature change curve of a target element in a wind turbine; generating a control signal based on the expected temperature change curve and a preset control law, wherein the control law is established according to a temperature response model of the target element and a sliding mode control strategy, the temperature response model comprises a time delay variable reflecting internal heat transfer delay of the target element, and the sliding mode control strategy constrains the boundary of temperature adjustment error through a preset performance function; and sending the control signal to a temperature control element to adjust the temperature of the target element. The technical scheme provided by the application can realize accurate adjustment of the temperature of the wind turbine element.

The present application relates to the field of food production equipment, and more particularly to a stirring and pulping device for jam processing and a stirring method thereof, comprising a pulping cylinder and a shaft pipe, the shaft pipe is built in the pulping cylinder, end covers are fixed at both ends of the pulping cylinder to support the rotation of the shaft pipe, a crushing knife is arranged in the middle section of the shaft pipe, an air inlet assembly is connected to the opening at the outer end of the shaft pipe, a driving element is fixed to the outer side of the end cover to support the rotation of the crushing knife, and the shaft pipe is a hollow circular pipe structure. The mounting cover, side pipe and knife body of the crushing knife form a gas passage, the material inside is directly sprayed through the gas holes densely arranged on the knife body, the heat transfer path is shorter, the jam can be directly contacted and the processing heat can be quickly taken away, a supercharged fan structure can be formed without additional driving elements, the outside air is purified through a filter screen and then sent into the hollow shaft pipe, the pulping and cooling on the knife body are integrally arranged, the energy consumption is reduced and the equipment structure is simplified.

The invention belongs to the technical field of aviation aircraft body structure design, and particularly relates to an aviation aircraft body structure fluid-thermal-solid coupling analysis method which comprises the following steps: step 1, establishing a body structure geometric model; step 2, performing pneumatic grid division on the geometric model of the airframe structure, and synchronously completing structural grid division in the process of establishing an external heat flow field of the airframe structure; step 3, performing flow field analysis on the engine body structure, and completing external temperature field analysis and internal heat transfer analysis based on external heat flow field boundary conditions; step 4, carrying out individual structure grid division on the geometric model of the engine body structure, and mapping a flow field analysis thermal load to a structure grid; and 5, carrying out force field analysis on the body structure, wherein the force field analysis comprises static analysis, vibration characteristic analysis and modal analysis.

The invention discloses a driving motor temperature calculation method based on a temperature-fluid weak coupling technology. The problem of motor heat network calculation oscillation caused by transient rapid heat exchange between fluid and a motor winding and an iron core component is solved. According to the method, heat network capacitance matrix characteristics are deeply analyzed, the influence of the ratio of the maximum value and the minimum value of matrix elements on iterative calculation convergence is considered, and a certain short time period is considered, the motor cooling fluid is driven, the temperature change of the motor is small, and the internal heat transfer phenomenon is stable; according to the method, a weak coupling calculation method of a rapid change fluid field and a slow change motor internal temperature field is established, different calculation frequencies are adopted in the fluid field and the temperature field, the inherent defect that the ratio of the maximum value to the minimum value of a heat capacity matrix element is too large is overcome, and rapid and stable calculation of the temperature of the driving motor is achieved. The temperature calculation method is clear in thought and easy to operate, has the advantages of being easy to implement, rapid in calculation, universal and the like, and shows excellent performance.

The invention discloses a household external combined cooling heating and power generation system, and belongs to the technical field of combined cooling heating and power generation systems, the system comprises a box body, the top side in the box body is connected with a fixing plate, one side below the fixing plate is provided with a recovery tank, and the bottom side in the recovery tank is provided with a descaling assembly and an auxiliary heating assembly. According to the cleaning device, high-temperature cylinder sleeve water in the recycling tank is conveyed into the fixed box through the liquid pump, liquid flowing in the fixed box can drive inclined blades, a rotating shaft, a connecting sleeve, a connecting rod and a scraping block to rotate, and the inner wall of the recycling tank is cleaned through the scraping block; a large amount of incrustation scale is prevented from being generated in the recycling tank in the long-time recycling and storing process, the smoothness of the heat transfer surface in the recycling tank and the heat transfer coefficient are prevented from being influenced, then the heat energy recycling efficiency and the heat preservation effect of the recycling tank are prevented from being influenced, and therefore the heat recycling effect of the system in the using process is effectively improved.