593 results about "Heating cooling" patented technology

The invention relates to the technical field of metal forge piece machining, in particular to an irregular metal forge piece heat treatment method and system.The irregular metal forge piece heat treatment method comprises the steps that firstly, temperature compensation partitions are divided according to geometrical characteristics, and stepped preheating is implemented to establish a uniform basic temperature field; then, the heat preservation time of each subarea is independently regulated and controlled in the austenitizing stage, and sufficient transformation of a thick-wall area structure and control over the grain size of a thin-wall area are both considered; in the quenching process, partition strength adjustment is carried out based on a preset cooling map, and cooling parameters are dynamically optimized through real-time feedback; and finally, according to the residual stress distribution, carrying out partition stepped tempering. The heating and cooling uniformity is remarkably improved through partition dynamic temperature management, and the structure difference and thermal stress concentration caused by section sudden change are effectively inhibited; the microstructure is ensured to be uniform and stable through austenitizing control; the hardenability and the deformation resistance are balanced through a differential cooling strategy; and directional reduction of residual stress is achieved through an intelligent tempering mechanism, and the cracking risk is greatly reduced while the comprehensive mechanical property is improved.

The invention discloses a temperature control system and method for a hot runner of an injection molding machine mold, and the method comprises the steps that the temperature control system collects the temperature data of each region of the hot runner in real time through a temperature sensor, and carries out the adjustment according to the data feedback; a built-in self-adaptive algorithm automatically adjusts a temperature control strategy according to different injection molding materials and production requirements, such as temperature upper limit, temperature lower limit and heating and cooling opportunities, and the production efficiency is optimized; when the system recognizes temperature fluctuation, a heating mode or a cooling mode is automatically switched, and the cooling system is dynamically adjusted for temperature balance; a plurality of temperature sensors are arranged in a key area of the mold for regional monitoring, and temperature control output is adjusted in real time; meanwhile, an embedded learning algorithm gradually optimizes a temperature control strategy according to historical production data, adjusts control parameters, and improves the production precision and efficiency. According to the temperature control system and the temperature control method for the mold hot runner of the injection molding machine, the problems of low temperature control precision, poor energy efficiency and slow response in the prior art are solved, and efficient and intelligent temperature control capability is provided.

The invention relates to the technical field of injection molding, and discloses a plastic part injection mold regulation and control system and method based on a complex curved surface and a thin-wall structure, and the plastic part injection mold regulation and control system based on the complex curved surface and the thin-wall structure comprises a mold modeling module, a temperature modeling module, a control modeling module, a control optimization module and a control execution module; the plastic part injection mold regulation and control method based on the complex curved surface and the thin-wall structure comprises the steps that a mold three-dimensional model and thermal control area mapping are built, a heat conduction model is built, modal dimensionality reduction is conducted, a target temperature field and a performance function are combined, optimal temperature regulation and control are achieved through a predictive control algorithm, real-time feedback is matched, and a heating and cooling unit is driven. And dynamic closed-loop control of the mold thermal field is realized. According to the method, thermal control precision and energy consumption efficiency are optimized through Galerkin modal dimension reduction, model predictive control and a weighted performance function, global closed-loop temperature control is achieved by combining mapping of a three-dimensional area and a heating and cooling unit of the mold, and system safety and stability are enhanced.

The invention belongs to the technical field of intelligent manufacturing, and particularly relates to a precise intelligent temperature control system of an injection molding machine. Comprising an acquisition layer, a control layer and an execution layer. The acquisition layer is used for monitoring the temperature of the injection molding machine cavity in real time; the control layer comprises a central controller and is used for receiving the temperature digital signal, executing logical operation according to a pre-trained deep Q network algorithm and outputting a control signal; the execution layer comprises a heating device and a cooling device, the heating device is used for heating a material cavity of the injection molding machine, the cooling device is used for cooling the material cavity of the injection molding machine, and based on deep learning and experience playback of the DQN algorithm, the algorithm can process a complex environment with a continuous state space, and in a precise intelligent temperature control system of the injection molding machine, the temperature of the injection molding machine can be accurately controlled. The DQN algorithm is used for selecting the optimal control action according to the current temperature state so as to achieve accurate control over the temperature, defects of injection molding products caused by temperature fluctuation are reduced, and the machining quality and the quality consistency are improved.

The utility model relates to the technical field of power batteries, and discloses a heating and cooling system integrated structure and a battery thermal management system, the heating and cooling system integrated structure comprises a refrigeration base material, a first insulating film, a heating core body and a second insulating film, the first insulating film is attached to the refrigeration base material, the heating core body is attached to the first insulating film, and the second insulating film covers the heating core body. As only one layer of insulating film is arranged between the heating core body and the refrigeration base material, compared with the prior art, the heat transfer medium between the heating core body and the refrigeration base material is less, and the heat transfer efficiency is high.

The invention belongs to the technical field of industrial salt-containing wastewater treatment, and discloses a desulfurization wastewater salt extraction system which comprises an evaporation tank main body, one side of the evaporation tank main body is fixedly connected with an air inlet, the other side of the evaporation tank main body is fixedly connected with a feed port, a heat conduction cavity is formed in the evaporation tank main body, and the heat conduction cavity is internally provided with an air inlet. And the bottom of the evaporation tank main body is fixedly connected with a discharge port. A driving motor is started, the driving motor is started to drive a rotating shaft to rotate, the rotating shaft rotates and drives a homogenizing plate, a mounting column, a first arc-shaped stirring rod, a first stirring rod and a second arc-shaped stirring rod to rotate at the same time, and internal desulfurization wastewater is continuously stirred, so that heat transfer of a heating and cooling device to materials is promoted; and the temperature of the material is homogenized, and dissolution, crystallization and condensation are promoted, so that the salt precipitation rate is increased, and the working efficiency is improved.

The invention relates to a heating and cooling system for wafer bonding equipment, which comprises a basic unit, a heating unit and a cooling unit, and is characterized in that the basic unit comprises an upper disc, a heating bin and a lower disc, and the heating bin is used for accommodating a wafer to be bonded and providing a vacuum environment for the wafer; the upper disc and the lower disc can be driven to be close to each other so as to apply set pressure to the wafer; an upper heater and a lower heater of the heating unit are used for heating the wafer in the axial direction, and an edge heater is used for carrying out heat compensation in the radial direction; an upper cooler and a lower cooler of the cooling unit are used for indirectly cooling the wafer; the wafer bonding device effectively improves heating uniformity and cooling efficiency in the wafer bonding process, can provide an accurate and effective vacuum environment for wafer bonding, and is simple in structure and easier to maintain and repair.

The invention discloses a heat treatment device for crusher parts and a using method thereof, and relates to the technical field of heat treatment. To solve efficiency problems; the device specifically comprises a base; a stand column is fixed to the outer wall of the top of the center of the base through bolts, a rotating ring is rotationally connected to the outer wall of the stand column, and three supporting arms in an equal-angle circular array are arranged on the outer wall of the rotating ring. A clamping mechanism used for clamping and fixing a shaft is arranged at the end of the supporting arm, a high-frequency heating mechanism and a cooling mechanism are arranged on the top of the base, and the high-frequency heating mechanism is fixed to the base through a support. By arranging the rotatable supporting arm and cooperating with the high-frequency heating mechanism and the cooling mechanism, the whole device has three stations of feeding and discharging, high-frequency heating and spray cooling, and the three stations are circularly arranged, so that feeding and discharging, heating and cooling can be synchronously and crossly carried out, and the heat treatment efficiency is improved.

The invention discloses a cutting device for wing plate machining and a cutting method of the cutting device, and belongs to the field of steel laser cutting. The cutting device comprises a machine table and a laser cutting unit connected to the machine table; the driving displacement unit comprises a workpiece table fixedly connected to the upper end of the machine table, a first single-axis moving module connected to the workpiece table, a YZ axial moving module fixedly connected to the outer surface of the first single-axis moving module and an XY axial moving module connected to the upper end of the workpiece table. By means of the induction heating part, preheating and temperature-controlled slow cooling are carried out on a wing plate, a web plate and a right angle of the high-strength H-shaped steel, thermal stress concentration caused by local rapid heating / cooling is reduced, microcracks caused by stress superposition are avoided, the microstructure of the laser cutting edge is more uniform, the crack sensitivity is reduced, and the quality of the H-shaped steel is improved. And residual stress accumulated in the cutting process is released, and delayed cracks caused by stress residues in later use are avoided.

The invention relates to the technical field of cold and hot fatigue test equipment, and discloses cold and hot fatigue test equipment for an aero-engine core component flame tube material, and the equipment comprises a frame, an experiment operation system, a thermal induction heating system, a circulating cooling system and an infrared temperature measurement system. According to the equipment, the flame tube sample is heated through the induction heating system, meanwhile, the temperature change is monitored in real time through the infrared temperature measurement system, and accurate temperature control is achieved. The equipment is further provided with a water mist cooling system, uniform water mist is sprayed through a gas-water mixing atomizing valve, the flame tube sample is rapidly cooled, the temperature is effectively reduced, and displacement or deformation of the sample is avoided. In another embodiment, the equipment is provided with a heating bin, a cooling bin and an isolation chamber, and an automatic door is utilized to realize rapid switching of the sample in each area, so that the experiment efficiency is further improved, and accurate control and rapid heating and cooling of the flame tube sample are realized.

The invention discloses a methanol engine fuel supply system and a control method. According to the system, an integrated fuel supply structure is adopted, and preheating of methanol fuel is achieved through cooperative work of an electronic methanol pump, a methanol combustion heater, an electronic water pump and a methanol guide rail. The innovation points are as follows: 1) the engine and the heater share a methanol box, a methanol coarse filter, an electronic methanol pump and a methanol fine filter; (2) a methanol combustion heater heats cooling liquid through methanol combustion, and the cooling liquid exchanges heat with methanol fuel through a methanol guide rail; and 3) an intelligent control strategy: when the system automatically judges that the starting mode and the starting condition do not meet the conventional starting mode, automatically entering a cold starting mode and preheating the methanol fuel, displaying the engine starting mode through a signal lamp mode, intelligently judging the engine starting state, and intelligently starting the methanol fuel under the condition that a driver does not start the engine for a long time. The methanol fuel temperature can be maintained through a control program, and the cold start state of the engine is kept.

The invention relates to the technical field of power equipment, in particular to an intelligent thermal management system for a cleaning robot, which comprises a state sensing unit, a risk assessment unit, a thermal state calculation unit, a data decision unit, an execution unit and a feedback correction unit, and is characterized in that the state sensing unit is used for acquiring internal temperature and humidity and key component temperature; the risk assessment unit calculates the characterization values of the dew formation trend and the overheating trend; the thermal state calculation unit quantifies the overall thermal state of the system; the data decision-making unit determines the actual adjustment amount of the heating and cooling power according to the parameters; the execution unit comprises a heating module, a cooling module and a load management module and correspondingly adjusts output power. And the feedback correction unit corrects the thermal state according to the operation deviation. According to the invention, through multi-parameter fusion decision and dynamic power adjustment, collaborative management of heat dissipation and condensation prevention is realized, and the working reliability of the cleaning robot in a severe environment is improved.

The utility model discloses high-temperature and high-pressure torsion equipment which comprises a stamping mechanism, a pressurizing mechanism, a torsion mechanism, a heating mechanism, a cooling mechanism, a control mechanism, an auxiliary mechanism and a frame mechanism. The stamping mechanism comprises a first stamping assembly, a second stamping assembly and a demolding assembly. The pressure applying end of the first stamping assembly and the pressure applying end of the second stamping assembly are suitable for being inserted into the two ends of the demolding assembly correspondingly and matched with an inner cavity of the demolding assembly so as to form a cavity used for containing a workpiece. The pressurizing mechanism is suitable for driving the first stamping assembly to pressurize the workpiece; the twisting mechanism is suitable for driving the second stamping assembly to twist the workpiece; the heating mechanism is suitable for heating the workpiece; the cooling mechanism is suitable for cooling the pressurizing mechanism and the torsion mechanism. The cooling mechanism is arranged, so that the equipment still runs reliably at high temperature, and the service life of the equipment is prolonged; when the workpiece is adhered to the interior of the cavity, the auxiliary mechanism is arranged to assist in splitting part of the structure of the stamping mechanism.

The present application discloses a quenching production line for quenching cam plates, which includes a quenching device movably arranged above a processing turntable. The quenching device includes a quencher and a cooler. The quencher is adapted to move to a processing station and heat the cam plate at the processing station, and the cooler is adapted to move to the processing station and cool the cam plate at the processing station. Among them, both the quencher and the cooler are annular structures, the quencher and the cooler are coaxially joined, the quencher is located above the cooler, and the quencher and the cooler are adapted to sequentially pass around the circumference of the cam plate at the processing station. A plurality of water outlet holes are formed in the inner circumferential side of the cooler along the axial direction and the circumferential direction of the cooler, and the water outlet holes are adapted to discharge water towards the axis direction of the cooler. The upper part of the inner circumferential side of the cooler is bent towards the axis direction of the cooler, so that the water outlet holes in the upper part of the inner circumferential side of the cooler discharge water towards the direction close to the center of the cooler. The present application has the characteristics of high processing efficiency.

A suspended ceiling system in one embodiment includes a grid support member and a ceiling panel supported on the member. A resiliently compressible gasket is disposed at the interface between the grid support member and peripheral edge of the panel. The gasket may be fixedly attached to the panel peripheral edge in the factory under controlled conditions before shipment to the ceiling installation site. In one embodiment, the gasket may be adhesively attached to the panel. Mounting the ceiling panel on the grid support member compresses the gasket to preferably form a minimally visible air leakage resistant seal between the air plenum space above the ceiling panels and the occupied space below. This retards air exchange between the spaces which enhances heating / cooling efficiency, noise reduction and allows formation of pressurized clean rooms.

The invention provides an injection mold temperature field regulation and control method and device based on multi-sensor fusion, and the method comprises the steps: recognizing a non-uniform region based on a surface radiation temperature distribution image, discrete point temperature data, an instantaneous heat flow direction and heat flow intensity information; based on each non-uniformity area and the heating and cooling unit adjacent to the non-uniformity area, constructing a space mapping relation, and based on the space mapping relation, the instantaneous heat flow direction and the heat flow intensity information, generating a heat flow path guide instruction; triggering a corresponding heating and cooling unit to execute alternate heating and cooling operation according to a preset phase difference based on the heat flow path guide instruction, so that the heat flow directionally migrates in the non-uniform region along a specified path; and monitoring that the temperature gradient change trend of each non-uniform area tends to be uniform based on a dynamic heat balance state formed by the heat flow after directional migration in the mold, and entering a steady-state maintenance mode. According to the invention, high-precision sensing and dynamic cooperative regulation and control of the global temperature field of the injection mold are realized.

In some implementations, a thermal management system includes a heat source and a heat pipe connected to the heat source and configured to transfer thermal energy from the heat source to a plurality of condensers, each of the plurality of condensers branching off from a main pipe of the heat pipe. The heat pipe can be a variable conductance heat pipe containing a working fluid vapor. Each condenser contains a reservoir of non-condensable gas (NCG). At least one of the condensers can be controlled by heating / cooling the respective reservoir of NCG, by reservoir volume changing via bellows, and / or by NCG amount changing via NCG insertion / extraction.

The invention discloses a turbine outer ring connecting structure and a thermal matching test device and method thereof, and belongs to the technical field of aero-engine tests.The turbine outer ring connecting structure comprises a turbine outer ring assembly, and the turbine outer ring assembly comprises a turbine outer ring and a metal casing connecting assembly; the metal casing connecting assembly comprises a metal casing and a connecting piece, a first connecting hole is formed in the outer wall of the metal casing, and the connecting piece is used for connecting and fastening the turbine outer ring and the metal casing; a plurality of displacement measuring holes are formed in the outer wall of the metal casing at intervals, and the displacement measuring holes are used for being matched with preset marks on the turbine outer ring so as to observe and measure the displacement deformation quantity of the turbine outer ring relative to the metal casing. The turbine outer ring is an integral CMC turbine outer ring, the turbine outer ring connecting structure is an integral ring type assembly structure, modular installation can be achieved, and the thermal matching test device can achieve a thermal fatigue test of heating-cooling load circulation alternation of the CMC outer ring.

The invention provides a new energy automobile heat pump system which comprises a master controller, a refrigerant loop and a cooling liquid loop, an air side condenser is omitted, and a passenger compartment built-in condenser and a water cooling condenser are connected in series to release heat. A hot gas bypass branch controlled by a first electronic expansion valve is additionally arranged between a compressor and a built-in condenser, and a first water pump and a second water pump are matched with two five-way valves to independently switch a main cycle, a battery branch and an electric drive branch, so that three branches are formed on the refrigerant side, and three closed loops are formed on the cooling liquid side; the combination can rapidly derive not less than ten operation modes, covers the whole-year working conditions such as refrigerating and heating, dehumidifying and deicing, waste heat recovery, independent heating / cooling of a battery and electrically-driven heat dissipation of a passenger compartment, meanwhile, the number of valve pumps and connectors is reduced, pipelines are shortened, the modularization degree is high, the low-temperature energy efficiency and the whole vehicle integration are remarkably improved, and the cost and the leakage risk are reduced.

A battery heating and cooling system may be used to provide ancillary heating and cooling to an occupant zone of a vehicle. The battery heating and cooling system may include a battery heating / cooling loop and a hydronic system heating / cooling loop. Upon receiving an indication to heat / cool the occupant zone, a battery management system may cause the battery heating and cooling system to direct coolant to the hydronic system heating / cooling loop to heat / cool the occupant zone toward a target occupant zone temperature. In some examples, the battery heating and cooling system directs coolant to the hydronic system heating / cooling loop during battery preconditioning or while heating / cooling the battery during operation of the vehicle. The target occupant zone temperature may correspond to a target battery temperature.

This present invention relates to a single body air treatment system for recreational vehicles and is a combination of components working in a scheme so to provide heating, cooling, dehumidification, ventilation, air-purification, heavy-duty drying, into a single body. The system comprising of a cooling air plant having a refrigerating cycle (105,107,108,109) and air heat exchangers acting with electricity and a heating plant having an incorporated fuel / Natural-Gas burner (118,119) acting as air furnace. The system operates heating and cooling simultaneously with in the same air-flow and provides air purification through an antibacterial electrical device. The system also integrates extra pipes to produce extra hot-water in winter while the system operates in heating. The system is integrated with a dedicated resonator chamber to minimize the external noise produce by extraction blowers.

A coolant system for a vehicle, according to the present disclosure, implements various operation modes by using a plurality of coolant lines and a pair of 8-way direction switching valves, thereby simultaneously performing cooling / waste heat recovery of electronic components and batteries and cooling / heating of an indoor air conditioning side of a vehicle.

The utility model relates to the field of welding technology, and specifically is a welding tool for stir friction welding of thin-walled parts. The utility model includes a tool base for fixing a bottom plate and a cover plate, a heating and cooling assembly is arranged on the top of the tool base, the bottom plate and the cover plate are positioned and fixed on the top of the heating and cooling assembly in sequence, and the heating and cooling assembly includes a heating module for heating the bottom plate and a water cooling channel for cooling the weld between the bottom plate and the cover plate. The utility model can effectively improve the flatness of thin-walled parts after stir friction welding.

The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic and photo-thermal integrated system of a large building and an operation method of the photovoltaic and photo-thermal integrated system, and solves the problems that heat loss of photovoltaic power generation for the building is large in the using process, and meanwhile the light energy conversion efficiency is affected by temperature rise in the working process of a photovoltaic panel. Comprising a power supply assembly, a grid-connected cabinet, a storage battery and a heat supply assembly, the power supply assembly comprises a photovoltaic power generation panel, a wind power generator and a transformer, the transformer is connected with a power grid, and a cooling water pipe is arranged on the bottom face of the photovoltaic power generation panel; the heat supply assembly comprises an ice storage machine, a phase change heat storage water tank, a ground source heat pump, an air conditioner, a water source heat pump, a lithium bromide unit, a water storage buffer water tank, a radiator and a heat exchange station. In the photovoltaic power generation process, the photovoltaic panel is cooled through water cooling, the light energy conversion efficiency of the photovoltaic panel is guaranteed, heated cooling water is used for heat supply, waste heat recovery is achieved, energy loss is reduced, and the energy utilization efficiency is improved.

The invention relates to the technical field of earphone production, in particular to a heating and cooling integrated device for earphone parts, which comprises a storage mechanism and a heating and cooling integrated mechanism, the storage mechanism comprises an equipment shell and a drawer part in sliding fit with the inner wall of the equipment shell, and the drawer part is composed of a drawer frame, a drawer cover and a heating and cooling integrated mechanism. And the drawer panel is fixedly arranged on the front surface of the drawer frame. According to the heating and cooling integrated device for the earphone parts, the storage mechanism is arranged, a PCB needing to be heated and welded is placed on the heat conduction plate, then the top fixing part is rotated, the edge of the PCB is limited through the PCB fixing plate, and then the PCB is heated and welded through the heat conduction plate on the bottom heating part; according to the PCB welding device, a drawer type structure is adopted, a plurality of PCBs can be heated and cooled at a time, a heating and cooling integrated mechanism is reasonably arranged in a drawer frame, and the occupied space of the device is reduced.

The invention discloses a method for synthesizing a positive electrode lithium supplement agent through ultrafast high-temperature heating and application of the positive electrode lithium supplement agent. The method comprises the following steps: S1, preparing positive electrode lithium supplement agent precursor powder; and S2, spreading the positive electrode lithium supplement agent precursor powder on a heating substrate, connecting two ends of the heating substrate to a constant current power supply, and carrying out ultrafast high-temperature heating and cooling in a specific gas atmosphere to obtain the positive electrode lithium supplement agent. The method for synthesizing the positive electrode lithium supplement agent through ultrafast high-temperature heating has the characteristics of high temperature rising and lowering speed (10-105 DEG C / s) and short heat treatment time (millisecond-second), and is low in energy and gas consumption, economical and efficient.

The invention discloses a high and low temperature test chamber circulation risk control system and a test method. The device comprises a heating cavity, a cooling cavity and a heating / cooling test area, a heater / cooling side fan and a heating / cooling side fan are arranged in the heating / cooling cavity, a heating / cooling placing area is arranged in the heating / cooling test area, and a side heating / cooling flow channel is formed between the heating / cooling placing area and each of the left and right side walls of the heating / cooling placing area. A heating air flow channel is arranged between the heating cavity and the heating test area, and the heating cavity is also communicated with the two side heating flow channels respectively; a cooling airflow channel is arranged between the cooling cavity and the cooling test area, and the cooling cavity is further communicated with the two side cooling flow channels. The temperature control box has the advantages that the uniformity of air flow is fully considered, a medium for heating and cooling circulates, diffuses and distributes uniformly in the temperature control box, the problem that the air speed in a local area is too fast or too slow to form a temperature gradient is effectively avoided, and the aging test effect and accuracy are greatly improved.

The utility model relates to a multi-station independent temperature control chip test seat, belongs to the technical field of chip aging test equipment, and aims to solve the problems of low test efficiency and high test cost caused by the temperature control problem of an aging oven when the conventional chip test seat adopts a single station to carry out chip aging test. The device comprises a carrying seat, a pressure head assembly and a temperature control assembly, the carrying seat is provided with an upper seat and a base, the base is provided with a test plate, and the base is provided with a plurality of chip mounting stations; the pressure head assembly is mounted on the upper seat and is provided with pressure heads in one-to-one correspondence with the mounting grooves; the temperature control assembly comprises a heating element and a cooling element, the heating element is installed on the pressing head and used for heating the chip, the cooling element is electrically connected with the testing plate and used for cooling the chip, and the temperature control assembly conducts aging test temperature control on the chip by controlling the heating element and the cooling element. The test bench is high in test efficiency, good in chip temperature control and low in test cost.

A coolant system for a vehicle according to the present invention implements various operation modes by using a plurality of coolant lines and a pair of 8-way direction switching valves, and can thus simultaneously perform cooling / waste heat recovery of an electronic component and a battery and vehicle indoor air conditioning-side cooling / heating.

The invention discloses a method and a system for testing the thermal resistance of a flat-plate-shaped water-cooling radiator for a high-power semiconductor device, and the method comprises the steps: providing a specified current through a power supply, employing two power semiconductor devices as a heating source, providing a heat dissipation environment through a tested flat-plate-shaped radiator and two auxiliary flat-plate-shaped radiators, and carrying out the testing of the heat resistance of the flat-plate-shaped water-cooling radiator. The two same thermal insulation flat plates keep thermal insulation, the power semiconductor device and the flat plate-shaped radiators form a heating and cooling system, and the thermal resistance of the middle flat plate-shaped radiator is tested. In the testing process, after the heating current is kept and the flat-plate-shaped radiator reaches steady-state heat balance, the inlet refrigerant temperature, the outlet refrigerant temperature and the table top temperature on the two sides of the tested flat-plate-shaped radiator are tested respectively, the heating power of the power semiconductor device is tested, and the thermal resistance of the tested flat-plate-shaped radiator is obtained through calculation. According to the invention, the thermal resistance of the flat radiator can be measured more accurately.