29results about How to "Wide temperature range" patented technology

The present application relates to a kind of compositions and applications comprising polyamide.The composition includes polyamide and sheet structure mineral powder, wherein, with 100 mass parts of polyamide, sheet structure mineral powder in the composition is 0.1-10 mass parts.The polyamide material in the present application has lightweight, easy processing, has cost advantage, compared with steel material has obvious advantage.Sheet structure mineral powder is added in polyamide material by intercalation modification, further improve the barrier property of product, effectively avoid "hydrogen embrittlement" risk, with "hydrogen embrittlement" resistance, low hydrogen permeability, and suitable for the temperature range of application, it has high toughness in low temperature environment condition, the performance of polyamide material reaches a good balance, and the comprehensive performance is better.Suitable for hydrogen pipeline, hydrogen storage bottle etc., has advantage in hydrogen energy automobile and other application scenarios.

This utility model relates to a highly reliable adaptive stable power supply. It primarily addresses the technical problem of existing conventional battery systems having a narrow applicable temperature range, making it difficult to meet the stable power supply requirements of electromechanical equipment in extreme environments. The technical solution of this utility model is as follows: the stable power supply includes a temperature monitoring module, a temperature display module, a core control module, a power adapter module, and a power output interface. The output end of the temperature monitoring module is connected to the receiving end of the core control module, the control end of the core control module is connected to the interface of the power adapter module, and the output end of the core control module is connected to the display port of the temperature display module. The core control module is composed of a single-chip microcomputer; it receives monitored data and transmits it to the temperature display module in real time. It uses a neural network-based recognition method to determine the temperature range and sends timely commands to the power adapter module. The output end of the power adapter module is connected to the power output interface.

The utility model provides a multi-level heat preservation electronic wire harness, which belongs to the technical field of electronic wire harnesses and comprises a wire harness body and connectors, the left end and the right end of the wire harness body are electrically connected with the connectors, the wire harness body comprises a core wire, a heat preservation layer, an anti-freezing layer, a heat insulation layer and an insulation layer, the core wire is located on the innermost side of the wire harness body, and the heat preservation layer is wrapped on the core wire. The outer side surface of the heat preservation layer is coated with an anti-freezing layer. According to the utility model, the insulating layer is arranged, the insulating layer is made of the fluorosilicone rubber material, the fluorosilicone rubber has a wider temperature-resistant range, can be usually used in a temperature range of-50 DEG C to 250 DEG C, and has excellent heat resistance and oxidation resistance, and the electrical insulation property of the fluorosilicone rubber is equivalent to that of silicone rubber, so that the insulating property of the fluorosilicone rubber is ensured; however, due to the enhanced chemical corrosion resistance, the fluorosilicone rubber is possibly more suitable for use in some special environments, and the fluorosilicone rubber cannot be hardened at low temperature, so that the flexibility of the wire harness body 1 is ensured, and the service life of the wire harness body is ensured.

The application provides a kind of alkaline zinc iron liquid flow battery electrolyte and its application, belong to liquid flow battery technical field.The negative electrode electrolyte of the application is prepared into suspension by dissolving zinc bromide in strong alkali solution;The concentration difference exists in the alkali concentration of positive and negative electrode electrolyte, and the alkali concentration of positive electrode electrolyte is lower than that in negative electrode electrolyte.The use of positive and negative electrode electrolyte of the application can effectively alleviate the migration problem of alkaline zinc iron liquid flow battery electrolyte, improve the energy density of negative electrode electrolyte, widen the applicable temperature range of battery, and improve the reliability of battery.

The application discloses a SARADC circuit for a temperature sensor, which comprises a CDAC array, a comparator, a SAR logic module and a temperature mode switching circuit. A pre-temperature sensor utilizes the temperature characteristics of the base-emitter voltage of a triode to generate a double-terminal voltage whose voltage difference linearly changes with temperature. The application first compensates for the inherent offset voltage of the temperature-sensing pre-stage circuit through the SARADC structure, and then converts the difference of the double-terminal voltage generated by the pre-temperature sensor and changing with temperature into an 8-bit binary digital signal, so that the temperature signal is represented by the quantized digital signal. The application changes the temperature range of ADC quantization by switching the reference voltage module of ADC. In the application, the difference of the double-terminal output voltage of the temperature sensor changes by 0.0039V when the temperature changes by 1 DEG C, and the LSB value of the SARADC is also 0.0039V, that is, the unit output digital signal of the SARADC changes correspondingly to the temperature change of 1 DEG C, so that the quantization temperature efficiency is effectively improved.

The neutron beam detection device of the present application is provided with: a first solar cell type detector, which has a conversion film attached to its surface that converts neutrons into any one of a charged particle beam of a photon, an alpha particle, a proton, a lithium nucleus, a gamma ray, and a beta ray, and generates a current by incident radiation; a radiation detector that generates a current having no sensitivity to neutrons as an output signal due to radiation incident; a current measurer that detects the current generated by the first solar cell type detector and the current generated by the radiation detector due to radiation incident as signals; and a flux calculation section that compares the current signals from the detector detected by the current measurer. The flux calculation section corresponds the detected current signals from the solar cell type detector and the radiation detector to a relationship between the flux of a prescribed kind of incident radiation and the detected current from the solar cell type detector and the radiation detector, which is obtained in advance, and calculates the flux of the neutron beam.

The application discloses a temperature control device for ice block low-temperature mechanical test and a method thereof, and belongs to the technical field of low-temperature mechanical test. The temperature control device comprises a temperature control mechanism, a heat preservation mechanism is arranged on the temperature control mechanism, the temperature control mechanism comprises a base and a cooling assembly, two bottom frames are fixedly connected to the top of the base, a fixing frame is fixedly connected to the top of each bottom frame, a test cavity is fixedly connected between the two fixing frames, the test cavity is connected with a refrigeration equipment through a hose at two sides, the refrigeration equipment is installed on the base through a support, and the two sides of the test cavity are connected with two ends of the cooling assembly. The upper sealing assembly is in contact with the bottom frame to generate a pushing force through the descending of the heat preservation cavity, the inflatable air bags are inflated and closely attached to each other at the moment, the test cavity can be kept closed, low-temperature overflow is reduced, the specified detection temperature can be quickly reached, and the detection efficiency is improved.

The invention relates to the technical field of carbon dioxide capture and adsorption, in particular to a calcium oxide-based adsorbent for high-temperature carbon dioxide capture and a preparation method. The adsorbent comprises a biomass calcium carbonate matrix, a skeleton proppant, a Ce-Zr-Cu composite oxide bifunctional aid, a conductive dispersant, a macropore-mesopore-micropore hierarchical porous structure formed by biomimetic mineralization of a biological template agent, and an amino functional group grafted by a surface modifier. The biomass calcium carbonate matrix is formed by compounding egg shells, shells and coral bones according to the mass ratio of 1: 1: 0.5; the skeleton proppant is formed by compounding a ZSM-5 molecular sieve and mesoporous gamma-aluminum oxide according to a mass ratio of 2: 1; in the scheme, biomimetic mineralization is realized by compounding a ZSM-5 / gamma-alumina skeleton and a Ce-Zr-Cu ternary auxiliary agent, introducing a PAN-based nitrogen-doped carbon network and matching with a diatom-egg white biological template, and APTES + PEI surface modification is performed, so that the problems of poor sintering, poor circulation, agglomeration and the like of a traditional adsorbent are solved in a targeted manner, double-temperature-zone adsorption is also realized, and the comprehensive performance is greatly improved.

The application relates to a high-speed stretching controllable spring for bicycle seat adjustment, which comprises a starting top rod, a hollow piston rod, a framework guide, a sealing ring, a pressurized air cavity, a positioning groove, a piston assembly, an oil cavity and a cylinder barrel, the cylinder barrel is divided into the pressurized air cavity and the oil cavity by the positioning groove, the framework guide is arranged at one end of the cylinder barrel, the sealing ring is arranged on one side of the framework guide, the piston assembly is arranged at one end of the oil cavity, one end of the hollow piston rod is connected with the piston assembly, the other end of the hollow piston rod penetrates through the framework guide and extends to the outside of the cylinder barrel, the starting top rod is arranged in the hollow piston rod in a penetrating mode, a piston valve needle is arranged in the piston assembly, and the piston valve needle is connected with the starting top rod; the application solves the problem of slow seat adjustment stretching speed, improves the adjustment response efficiency, reduces the product size, optimizes the installation adaptability, reduces the compression ratio and reduces the operation force change.

This invention discloses a dynamic control and heat collection system and its application based on flexible radiative cooling materials, belonging to the field of solar energy utilization technology. It includes several biomimetic phototactic flexible curved surface radiative cooling device fields, a tracking system, and a solar thermal utilization system. The biomimetic phototactic flexible curved surface radiative cooling device fields include a flexible radiative cooling film, a film surface flat-curvature conversion device, and several support rods. The tracking system includes a controller and temperature and light intensity sensors electrically connected to the controller. The solar thermal utilization system includes a solar receiver and a heat storage tank, with a heat transfer medium inside the heat storage tank. Under high-temperature conditions, the flexible radiative cooling film reflects sunlight to the solar receiver while simultaneously dissipating heat to the outside through infrared radiation, reducing the energy consumption required for indoor cooling of buildings. At the same time, the heat collected by the solar receiver is stored in the heat storage tank and can be used for daily hot water supply in buildings, achieving efficient utilization of solar energy.

The invention provides a charcoal-based metal oxide composite material as well as a preparation method and application thereof, and belongs to the technical field of viscosity reduction of thickened oil. The rich porous structure and high specific surface area of the biochar are used as a carrier of the active component, so that the active component is uniformly dispersed, active sites are increased, and the catalytic activity is improved; iron oxide can catalyze hydrocarbon in the thickened oil to generate oxidation reaction to generate oxygen-containing functional groups, so that the viscosity of the thickened oil is reduced; niO has good hydrogen transfer capacity and can promote hydrogen atoms to be transferred from a hydrogen donor to unsaturated hydrocarbon of the thickened oil, so that the viscosity of the thickened oil is reduced; the rare earth oxide can enhance the reaction activity of ferric oxide and NiO, promote the oxidation-reduction reaction, reduce the temperature of the catalytic reaction and expand the temperature application range; the rare earth oxide can also protect the transition metal oxide, so that vulcanization is reduced, and the service life is prolonged; the silicon dioxide layer can avoid loss of active components, and the cycle service life is prolonged.

The present application relates to the technical field of lubricating grease, and particularly relates to a steel wire rope lubricating grease and a preparation method thereof. The steel wire rope lubricating grease comprises the following components in percentage by weight: base oil 40-70%, petroleum-based wax or synthetic wax 5-25%, tackifier 5-30%, sepiolite 3-15%, antirust agent 0.5-5%, antioxidant 0.5-5%, and anti-wear agent 0.5-5%; the base oil is selected from one or more of naphthenic base oil, poly-alpha olefin, extracted oil and asphalt. The lubricating grease provided by the present application can improve the dropping point and high-temperature performance of the product, solve the problems of high-temperature oil dripping and low-temperature brittle cracking of the existing product, has a wide use temperature range, and has excellent adhesion, high-low temperature performance, rust resistance and anti-wear performance, and can meet the requirements of lubricating performance and service life of the steel wire rope under harsh conditions such as high temperature and low temperature.

The invention discloses a co-sintered segmented thermoelectric material and a preparation method thereof, and the method comprises the following steps: S1, selecting N thermoelectric matrix materials with the same material system but different chemical proportions, respectively weighing the raw materials according to the stoichiometric ratio of the N thermoelectric matrix materials, and carrying out the high-temperature smelting to obtain N cast ingots; s2, the N types of cast ingots are subjected to crushing and powdering correspondingly, and N types of powder are obtained; and S3, the N kinds of powder are weighed according to the mass ratio requirement, the specific mass ratio is obtained through simulation according to the actual temperature difference and the powder number, then a sintering mold is filled with the N kinds of powder step by step according to the room-temperature conductivity from low to high or from high to low, integrated sintering is conducted, the co-sintered segmented thermoelectric material is obtained, and N is an integer larger than or equal to 2. The method is simple in preparation process and flexible in structure, and a thermoelectric material with high performance and a wide working temperature area can be obtained through integrated sintering.

The invention discloses a method for preparing a high-temperature lubricating material from high-temperature slag and application of the high-temperature lubricating material, and relates to the technical field of industrial solid waste utilization. According to the method, ferronickel slag is adopted as a main raw material and is converted into a high-temperature lubricant with excellent performance through high-temperature melting and water quenching processes, and the high-temperature lubricant is applied to the thermal forming machining process of alloy profiles such as high-temperature alloy and titanium alloy. According to the method, the resource utilization rate of the ferronickel slag can be effectively increased, soil and water pollution caused by stacking and landfill can be reduced, so that green resourceful treatment of the slag is realized, related cost can be greatly reduced by replacing an outsourced high-temperature lubricant, and remarkable economic and environmental benefits are achieved.

This invention provides a liquid crystal composition, a liquid crystal display device comprising the same, and applications thereof. The liquid crystal composition of this invention comprises at least one compound of general formula I, at least one compound of general formula F, at least one compound of general formula M, and at least one compound of general formula N. In the liquid crystal composition of this invention, through the specific structure and content of the compounds, it maintains appropriate dielectric anisotropy, good optical anisotropy, and good clearing point, while possessing a large elastic constant and high transmittance; thus, the liquid crystal display device comprising the same has a fast response speed and a high contrast ratio; the liquid crystal composition of this invention is suitable for application in fast-response display modes such as VA, PSVA, IPS, and NFFS.

The utility model discloses a high flame-retardant cable, which comprises a flame-retardant sheath, an aluminum-plastic composite belt lining and a protection mechanism, the aluminum-plastic composite belt lining is arranged on the inner periphery of the flame-retardant sheath, and the protection mechanism is arranged inside the aluminum-plastic composite belt lining; the protection mechanism comprises an aramid fiber layer, silicone rubber, a reinforcing assembly, a TPU sleeve, a plurality of wire cores, an insulating sleeve and a filling layer. According to the scheme, the protection strength of components in the cable is greatly improved, and the service life of the wire cores and even the whole cable is prolonged.

The application discloses a kind of all-vanadium redox flow battery electrolyte and preparation method thereof, belong to all-vanadium redox flow battery electrolyte preparation field.Preparation raw materials of all-vanadium redox flow battery electrolyte include: vanadium pentoxide, thiourea, sodium dodecyl sulfonate, anhydrous ethanol, sulfur dioxide, sodium chloride, boric acid, sulfuric acid, phosphoric acid tributyl and perfluorobutyl sulfonic acid.Preparation steps of all-vanadium redox flow battery electrolyte include: preliminary reduction liquid preparation, preliminary reduction, secondary reduction and all-vanadium redox flow battery electrolyte preparation.The prepared all-vanadium redox flow battery electrolyte has the advantages of good stability, strong energy storage capacity, wide temperature range, etc.Solves the problem of poor stability, narrow temperature range, the need to equip complex, expensive, energy-consuming electrolyte temperature control device of high-concentration all-vanadium redox flow battery electrolyte.

The utility model discloses a high-precision guide structure of an electro-hydraulic bending machine, and belongs to the technical field of bending machines. A high-precision guide structure of an electro-hydraulic bending machine comprises a guide column and a sliding plate, the guide column is connected with the sliding plate in a sleeved mode, a supporting plate is arranged on one side of the sliding plate, sleeving holes are formed in the two ends of the supporting plate, composite guide sleeves are installed on the sleeving holes, the composite guide sleeves are arranged along the inner walls of the sleeving holes, and the composite guide sleeves work in the mode of being attached to the outer wall of the guide column. The four-direction independent compensation structure ensures high guide precision, real-time dynamic compensation eliminates accumulative errors, an automatic compensation mechanism can offset certain abrasion loss, the self-lubricating design prolongs the maintenance period, the overall service life is prolonged, four sets of independent hydraulic systems can perform differential compensation, inclination caused by unbalance loading can be automatically corrected, and the service life is prolonged. Automatic abrasion compensation is achieved, and manual intervention is not needed.

The application provides a hectorite-polymer large-temperature-difference constant-flow rheological modifier and a preparation method and application thereof. The rheological modifier comprises the following raw materials in parts by weight: 2-5 parts of nano hectorite, 4-10 parts of a silane coupling agent, 8-12 parts of a monomer containing an adsorption group, 10-15 parts of an anionic monomer, 5-8 parts of a cationic monomer, 2-5 parts of a temperature-sensitive monomer and 0.14-0.18 parts of an initiator. The preparation method of the rheological modifier is as follows: the nano hectorite is modified by using the silane coupling agent first, and then the modified nano hectorite is subjected to a copolymerization reaction with a mixed solution of various monomers under vacuum and in the presence of the initiator to prepare the hectorite-polymer large-temperature-difference constant-flow rheological modifier. The application also provides the application of the rheological modifier in a natural gas hydrate drilling fluid. The hectorite-polymer large-temperature-difference constant-flow rheological modifier provided by the application has good temperature resistance and salt resistance, excellent low-temperature regulation capacity and a wide temperature application range.

A heater arrangement for an apparatus for layer-by-layer formation of a three-dimensional object by the consolidation of particulate matter, the heater arrangement having a heater arrangement area, and comprising: one or more shrouded radiative heating elements, arranged over the heater arrangement area, the shrouded radiative heating elements being operable to heat particulate matter at a build bed surface of said apparatus to a desired temperature profile; and one or more radiation-restricting shrouds, which are arranged in communication with the shrouded radiative heating elements, and each of which form one or more passages for restricting the solid angle over which radiation is emitted by the shrouded radiative elements, each passage having a first end which opens towards at least one of said shrouded radiative heating elements, and a second end which opens to the exterior. Also provided is apparatus for layer-by-layer formation of a three-dimensional object by the consolidation of particulate matter, the apparatus comprising: a working space having opposing bottom and top sides; a build bed surface on said bottom side of the working space and upon which successive layers of said object are formed, the build bed surface comprising a printable area; and a heater arrangement area on said top side of the working space and comprising a plurality of spaced-apart radiative heating elements arranged on said top side of the working space, the radiative heating elements being operable to heat particulate matter at the build bed surface to a desired temperature profile; wherein said plurality of spaced-apart radiative heating elements comprises a first group of four or more radiative heating elements; and wherein, as viewed from said top side of the working space, said first group of four or more spaced-apart heating elements is arranged beyond and around the perimeter of printable area and within the heater arrangement area.

This application relates to a trolley cable sheath material and its preparation method, belonging to the field of cable technology. The trolley cable sheath material provided in this application, by weight, comprises the following components: 100 parts PVC, 20-40 parts aconitate, 0.5-1 part UV-absorbing additive, 5-10 parts flame retardant, 0.5-2 parts lubricant, and 1-5 parts heat stabilizer. This trolley cable sheath material has good cold resistance, high temperature resistance, and UV resistance, and is safe and environmentally friendly for direct user contact. It can meet the usage scenarios of trolley cables in cold or sunny weather and with high heat generation. Furthermore, it has suitable hardness, is easy to process, and has excellent wear resistance, making it suitable as a sheath material for trolley cables.

The application discloses a polyboron organic non-metallic catalyst and a preparation method and application thereof. The polyboron organic non-metallic catalyst is prepared by a one-step method through a boron-hydrogen reaction of a polymer containing a double bond and a compound containing a boron-hydrogen bond, has simple operation, and has 100% atomic economy. Compared with the existing small-molecule organic borane, the catalyst has the characteristics of wide monomer application range, high selectivity, wide temperature use interval, and simple preparation process, can be applied to catalyzing an epoxy monomer homopolymerization reaction and an epoxy monomer copolymerization reaction, and has extremely high catalytic activity due to the increased concentration of activated epoxy monomers around a growing chain.

The invention relates to the technical field of anti-counterfeit printing materials, and discloses a temperature change anti-counterfeit printing coating which comprises a bearing substrate, a functional layer group and a protective surface layer which are sequentially arranged from bottom to top, the bearing substrate is made of a material adaptive to a target application scene, and the material comprises any one of plastic, paper and metal; the functional layer group at least comprises a temperature change core layer, the temperature change core layer contains at least one thermochromic component, the thermochromic component is selected from a nano modified microencapsulated pigment, and the color change temperature precision of the temperature change core layer is less than or equal to + / -0.3 DEG C. According to the invention, environmental thermal disturbance is resisted in a targeted manner through differentiated structural design, namely, the cavity of the heat insulation layer in the eight-layer structural scheme and the heat insulation sheet work together, so that interference of external temperature fluctuation on the temperature change core layer can be isolated, and the response time is shortened by more than or equal to 50%; according to the five-layer structure scheme, the photothermal conversion efficiency is optimized through 8% of graphene / CNTs composite filler, and rapid conduction and uniform distribution of heat are achieved.

The utility model provides a kind of gas-liquid two-phase self-circulation temperature control system, including booster unit, temperature compensation unit, pressure and temperature monitoring unit, the temperature compensation unit is connected with the export pipeline of space environment medium carrier, the booster unit uses wide temperature range high pressure fan, the rear end pipeline of the booster unit is equipped with medium compensation unit, the parallel pipeline of the medium compensation unit is equipped with electric heater, the output of the medium compensation unit is connected the import pipeline of space environment medium carrier;The front end of the booster unit is equipped with temperature compensation unit, the front end of the temperature compensation unit is equipped with pressure and temperature monitoring unit.It solves the technical problem that the existing temperature control system needs to first rise and fall temperature to the medium before pressure boosting, resulting in energy loss and complex pipeline layout, low space utilization, higher equipment investment cost.The utility model can be widely applied in temperature control system.

The utility model relates to the technical field of vacuum equipment, and particularly discloses a high-vacuum tube furnace convenient to take and change samples, which comprises a tube furnace mounted on a support table, a quartz furnace tube arranged in the tube furnace, a heating element arranged in the tube furnace, and a sample taking device arranged in the tube furnace, one end of the quartz furnace tube penetrates through the tube furnace and is connected with a vacuum system through a quartz tube connecting flange, the vacuum system comprises a six-way square cavity supporting frame, a six-way square cavity, a mechanical pump connector, a sampling dismounting head and a molecular pump, one end of the six-way square cavity is connected with the molecular pump through a vacuum pipeline, and a gas circuit module is arranged in the supporting table; the gas circuit module is connected with the quartz furnace tube; the molecular pump is provided with a series of vacuum systems, so that the operation of replacing samples without shutdown is realized, the working efficiency is obviously improved, and the start and stop times of the molecular pump are reduced, so that the abrasion of the molecular pump is reduced, and the overall service life of the equipment is prolonged.

The utility model relates to filter technical field, and disclose a kind of steel lining plastic basket filter, including filter main part and filter core, the two sides of filter main part are equipped with water inlet and water outlet respectively, the filter core is set in filter main part, the inner wall of filter main part is equipped with the placement ring for supporting filter core, the material quality of filter core is steel lining plastic material quality, the top of filter core is equipped with the positioning ring matched with placement ring, compared with metal basket filter, the filter core of this kind of steel lining plastic basket filter adopts the material quality of steel lining plastic, with can resist strong acid, strong base, organic solvent etc. Most chemical medium, almost not be dissolved by any solvent, suitable for strong corrosion environment, not easy to deform under high temperature, low temperature environment still keep good toughness, maintenance cost is lower, excellent surface performance inner wall friction coefficient is low, medium flow resistance is small, and with not adhere, anti-pollution characteristics, suitable for high-purity medium conveying.

The invention discloses a high-temperature-resistant fire-fighting robot temperature measurement sensor structure, and relates to the technical field of fire-fighting equipment, the high-temperature-resistant fire-fighting robot temperature measurement sensor structure comprises a chassis, a vehicle body is arranged on the upper surface of the chassis, a fire extinguishing assembly and a temperature measurement sensing assembly are arranged on the vehicle body, and the temperature measurement sensing assembly comprises an outside-vehicle temperature measurement sensor and an inside-vehicle temperature measurement sensor; the vehicle exterior temperature measurement sensor is located at the top of a shell of the vehicle body, and the vehicle exterior temperature measurement sensor obtains external temperature information in real time in a non-contact mode through the infrared temperature measurement technology and is used for monitoring the external environment temperature; the in-vehicle temperature measurement sensor is installed near an electronic element in a vehicle body, and the in-vehicle temperature measurement sensor is a thermistor temperature sensor and is used for feeding back the temperature state in the machine in real time to prevent the equipment from being overheated. The system has the function of comprehensively monitoring the temperature inside and outside the fire-fighting robot body.

This application provides a temperature measurement assembly for electron migration testing, used to measure the temperature of a chip under test on a test socket. The assembly includes a temperature measuring element, a sleeve, and a resistance temperature detector (RTD) element disposed within the sleeve. The RTD element extends along the length of the sleeve and has two opposing terminals extending through the sleeve. The sleeve is used to be embedded in the test socket. A heat-resistant plate is disposed at one end of the temperature measuring element and has two opposing mounting ends. The two terminals are respectively disposed on the two mounting ends and protrude relative to the mounting ends. The heat-resistant plate separates the RTD element and the test socket. The electron migration testing temperature measurement assembly provided in this application utilizes a heat-resistant plate to prevent the RTD element from sticking to the test socket at high temperatures.

The invention relates to the technical field of air conditioner refrigeration, in particular to a natural cooling water side circulation device and a refrigeration system and method.The device comprises at least two cooling towers, at least two cooling water pumps and at least two heat exchangers which are sequentially arranged in the cooling water flowing direction; a water distributor is arranged in the cooling tower and is of a disc type structure, original water distribution holes and newly-added water distribution holes are formed in the water distributor in an array mode, and the newly-added water distribution holes are provided with hole opening degree adjusting mechanisms. After the water distribution holes are additionally arranged, the water distribution holes are gradually opened under the condition that the temperature is extremely low, the water distribution capacity of a single cooling tower is improved, and therefore the difference value between the outlet water temperature and the freezing point of cooling water can be increased by additionally arranging a cooling water circulating pump, improving the circulating water amount of the single cooling tower and reducing the temperature difference between inlet water and outlet water of the cooling water; and therefore, the applicable temperature range of the natural cooling technology in severe cold areas is widened, and the operation time of a natural cooling system is prolonged.