62results about How to "Small temperature range" patented technology

The invention discloses a control method of an electronic expansion valve of an indoor machine during refrigerating of a convertible frequency air conditioner. The control method comprises the following steps of: 1, judging whether a microprocessor of the indoor machine (8) is in a heating standby state; 2, regulating the openness of the corresponding indoor electronic expansion valve (7) to reach 30-50 paces by the microprocessor; and 3, keeping the openness of the indoor electronic expansion valve (7) in the step 2 for 2-6min, regulating the openness of the corresponding indoor electronic expansion valve (7) by the microprocessor according to temperatures transmitted by a liquid pipe temperature sensor (9) and an indoor heat exchanger coil temperature sensor (11) every 15-35S in accordance with the following rules: the openness of the regulated indoor electronic expansion valve (7) is equal to the sum of the openness of the indoor electronic expansion valve (7) before the regulation and the openness of the regulation of the indoor electronic expansion valve (7), and the openness of the regulation of the indoor electronic expansion valve (7) is equal to (T3-Tmin-A)*E+delta(T3-Tmin)*F. Compared with the prior art, the control method disclosed by the invention has the characteristics of being suitable for a one-more air conditioner, being capable of effectively ensuring stable operation of the system and improving heating efficiency of the system, being low in energy consumption, and ensuring that the temperature change range of an indoor environment is smaller and the comfort degree of the indoor environment is higher.

The invention discloses a concealed fire source detection system in a goaf. The detection system comprises a plurality of wireless temperature sensor network node devices, CANs (Controller Area Network), a data receiving module and an upper computer, wherein the CANs are distributed in roadways, the data receiving module is arranged on the ground, the plurality of wireless temperature sensor network node devices are respectively hang on the CANs connected with the data receiving module through an optical cable and the data receiving module is connected with the upper module. During the coalmine production period, the plurality of wireless temperature sensor network node devices are arranged at regular intervals when a working surface is propelled, the CANs are arranged in the roadways at the two sides of the working surface, the plurality of wireless temperature sensor network node devices are respectively hung on the CANs, signal transmission optical cables are paved to the ground along the underground roadways and are connected with the ground data receiving module, and the data receiving module is connected with the upper computer of a monitoring chamber. The concealed fire source detection system provided by the invention has the advantages of improving the detection precision of the concealed fire source of the coal goaf, the problems that the temperature measurement response of the goaf can be solved, and the labor problems of the temperature measurement of the coal goaf can be solved.

The invention relates to a solar simulator adopting a heat-sink-free collimating mirror. The solar simulator comprises a light source system, a main tank of a vacuum system and an auxiliary tank of the vacuum system, wherein a collimating mirror frame is arranged in the auxiliary tank of the vacuum system; a collimating mirror is arranged on the collimating mirror frame; the collimating mirror frame is connected with the inner wall of the auxiliary tank of the vacuum system; the outer wall of the auxiliary tank of the vacuum system is exposed in the air; and the collimating mirror is used for carrying out thermal conduction through the collimating mirror frame and the auxiliary tank of the vacuum system. The solar simulator provided by the invention is simple in structure; the temperature change range of the collimating mirror is small; the service life is long; the surface shape change of the collimating mirror is small; and the stability of the irradiation uniformity of a test surface when the solar simulator works for a long period of time is high.

The invention discloses a propylene epoxide-carbon dioxide copolymer and a preparation method thereof. The preparation method of the propylene epoxide-carbon dioxide copolymer comprises the followingsteps: S1, adding propylene epoxide and a catalyst in a prepolymerization kettle and stirring; S2, feeding carbon dioxide gas in the prepolymerization kettle, and carrying out prepolymerization to obtain a propylene epoxide-carbon dioxide prepolymer; and S3, adding the propylene epoxide-carbon dioxide prepolymer in a polymerizing kettle, stirring, feeding carbon dioxide gas into the polymerizing kettle, and carrying out polymerization to obtain the propylene epoxide-carbon dioxide copolymer. According to the preparation method of the propylene epoxide-carbon dioxide copolymer, preparation of the propylene epoxide-carbon dioxide copolymer is divided into two processes including prepolymerization and polymerization, thus, the viscosities of products in the same reaction kettle are close to one another, stirring structures are easy to select, uniform stirring is implemented, and the stability of the products is improved favorably.

The invention relates to a non-isothermal forming device and technique for continuous fiber reinforced thermoplastic composite material. The non-isothermal forming device for the continuous fiber reinforced thermoplastic composite material comprises a male die assembly, a female die assembly, an edge pressing assembly, a supporting and guiding assembly, a demolding assembly and a temperature control assembly. The non-isothermal forming technique for the continuous fiber reinforced thermoplastic composite material comprises the following steps that a female die base and a male die are preheated, a blank is placed between a female die and an edge pressing ring, the blank, the female die and the edge pressing ring are put into an external heating device to be preheated to a target temperatureand then put into the female die base, the male die moves down to complete the deformation of the blank, heating inserts are then taken away, the liquid circulation is carried out to cool the dies and a workpiece, and finally, the dies are opened and the workpiece is taken out. According to the non-isothermal forming device and technique for the continuous fiber reinforced thermoplastic compositematerial, a traditional composite material hot-press forming technique is simplified, the equipment requirement is reduced, meanwhile, the high and low temperature circulation working conditions of aheating device are avoided, and the forming quality is guaranteed.

The invention relates to a high parameter steam drum intermediate reheating system for waste incineration power generation. An intermediate reheater is further arranged in the steam drum, steam generated by a boiler first enters a high pressure cylinder of a steam turbine, the steam drives the high pressure cylinder to do work and enables a generator to generate electricity, the steam from the high pressure cylinder of the steam turbine enters the intermediate reheater for reheating, and then enters a low pressure cylinder of the steam turbine and drives the low pressure cylinder to do work and enables the generator to generate the electricity. The saturated steam in the steam drum is used in the intermediate reheater for reheating the steam after working in the high pressure cylinder of the steam turbine, then returning to the low pressure cylinder of the steam turbine to continue to expand and do the work, so that the cycle thermal efficiency and power generation efficiency are improved. Because the steam drum has certain buffering ability to the boiler loading change, the steam temperature in the steam drum changes little, so that the steam temperature of the intermediate reheater changes smoothly and the range of temperature regulation is small, and the temperature regulation of the intermediate reheater is facilitated. In addition, the steam intermediate reheating processcan reduce the exhaust humidity of the low pressure steam turbine, the working conditions of last stage blades of the steam turbine are improved, and the service life of the steam turbine is prolonged.

The present invention relates to a method and a device for monitoring an exhaust-gas turbocharger of an internal combustion engine. In order to create an inexpensive and also reliably operating method and a corresponding device for monitoring an exhaust-gas turbocharger, it is proposed that a sound transducer which is designed to record rotational-speed dependent turbocharger operating noise is provided, which sound transducer is connected to an electronic system for frequency analysis for the output of a turbocharger rotational speed signal.

The invention discloses a novel assembly type green pedestrian overpass which comprises a two-way separation type non-motor vehicle running layer, a green side viewing type pedestrian layer and an overpass upper and lower supporting assembly; the two-way separation type non-motor vehicle running layer is arranged on the overpass upper and lower supporting assembly; and the green side view type pedestrian layer is arranged on the two-way separation type non-motor vehicle running layer. The invention relates to the technical field of overpass, in particular to the novel assembly type green pedestrian overpass and the using method thereof. The design of double-layer passage, people-vehicle separation and the like is adopted, passage efficiency and convenience are improved on the premise of guaranteeing safety, temperature changes of the overbridge and a passage area are reduced through the water tank arranged in the interlayer, so that deformation of the steel structure is reduced, and the leisure and entertainment requirements of people are met through the viewing platform; impact force caused by non-frontal collision of vehicles is transferred through a rotary force unloading roller, damage to the vehicles and the bridge piers is reduced, and the problem that an existing common overbridge can only be used for pedestrians to pass is effectively solved.

The invention provides a hard branch cutting seedling culture method for metasequoia. The method comprises the steps of (1) selecting annual peripheral side branches of metasequoia with a tree age of two years as cutting slips in the middle ten-day period of December every year, wherein the length of the cutting slips is 7-9cm; (2) binding 100 cutting slips into a bale, placing the bale into a room, performing wet sand storage and spraying a storage solution on wet sand every 7 days; (3) in the middle ten-day period of February of the second year, taking out the stored cutting slips, unbinding the cutting slips and spraying a nutrient solution on the cutting slips uniformly; (4) placing the cutting slips with sprayed nutrient solution in a room with a concentration of carbon dioxide of 2000ppm, illuminating the cutting slips with purple light for 20-30min and taking the cutting slips out for cuttage. The hard branch cutting seedling culture method for metasequoia can greatly increase the survival rate of metasequoia cutting slips, increase the rooting speed of metasequoia, and shorten a seedling culture cycle.

The invention discloses a hair curler, which comprises an aluminum tube, wherein a heater is arranged in the aluminum tube; the aluminum tube is elastically and movably connected with a hair clip; the heater is wrapped by an aluminum plate; and the aluminum plate is in planar contact with the aluminum tube. The heater is arranged in the hair curler, a heating box is connected with the aluminum tube through planar contact, heat is transferred in a planar contact mode, and the efficiency is extremely high. When temperature of the heater is 280 DEG C, the temperature to the surface of the aluminum plate is about 250 DEG C. Temperature difference range between the heater and the aluminum plate is narrower, so that a function of difficulty damaging hair quality is achieved; and a temperature sensor is connected with the aluminum tube through direct contact. Temperature control is accurate and reliable, and temperature difference is reduced. Other accessories are not required between a plastic head and the aluminum tube, so that a production process is directly simplified, and the production cost is reduced.

A photo etching device is for a substrate which having a first temperature scope when it is moved out from photoresist coating as well as displaying unit, setting air float transfer unit between photoresist coating as well as displaying unit and exposing unit, driving base plate to said exposing unit by air float transfer unit, making air ejected out from air float transfer unit be the second temperature scope being part of the first temperature scope.

The invention provides a solution regeneration method and a device based on variable cross-section hot compression. The regeneration device comprises a cold/hot source liquid-phase heat exchanger, a cold/hot source gas-phase heat exchanger, a first cavity, a first piston, a piston rod, a second piston, a liquid inlet valve, a liquid discharging valve, a second cavity, a reverse osmosis membrane, a pressurizing module and a pressurizing valve. According to the solution regeneration method and the device disclosed by the invention, hot pressure is used as a driving force and high reverse osmosis pressure is obtained by the low hot pressure through variable compression area to supply high pressure to a solution side of the reverse osmosis membrane; and water in a diluted solution is penetrated out to increase the concentration of the solution, thus realizing regeneration of the solution. The invention provides feasible method and solution for regeneration of the solution, which have the advantages of simple structure, feasibility and high economical efficiency.

The invention relates to a support structure of a battery energy storage device and the battery energy storage device. The support structure is used for installing a battery module, a containing cavity is formed in the support structure, and the containing cavity is filled with a phase change material. The support structure is provided with a containing cavity, and the containing cavity is filled with phase change materials. Through the phase change material filled in the accommodating cavity, heat can be absorbed from the battery module when the temperature of the battery module is relatively high, and heat can be released to the battery module when the temperature of the battery module is relatively low, so that the temperature of the battery module is maintained, and the working performance of the battery module is ensured to be safe. Compared with the prior art, the support structure of the battery energy storage device can more uniformly control the temperature of each battery module in the battery energy storage device, more space can be provided for mounting more battery modules, the energy consumption is less, the temperature change range of the battery modules is smaller, and the temperature of the battery modules is more stable.

The invention relates to a novel coating and system for monitoring abnormal heat generation of a power transmission line and power transmission and transformation equipment, wherein the coating is coated on the surface of a monitored object, the composition of the coating is Zn-5Al-nX, X is a pigment with a reversible temperature indicating function, and n is the component percentage of the pigment. The system comprises a coating, a color sensor, a signal receiver, a processor and an alarm, wherein the surface of a monitored object is coated with the coating, the color sensor is used for monitoring the color change of the coating, the signal receiver is used for receiving the output signal of the color sensor, the processor is used for receiving the output signal of the signal receiver, and the alarm is used for receiving the output signal of the processor. According to the invention, the novel coating is good in chemical stability, small in temperature indicating temperature level, long in service life, low in manufacturing cost and convenient to use; and with the the system, the workload is reduced, the unmanned aerial vehicle inspection time is saved, and the working efficiencyis greatly improved.

The invention relates to a technology for white synchronous railroad, which uses a glabrous white heat isolation layer to be coated on a railroad. A sleeper, in particular a steel sleeper, is coated with the glabrous white heat isolation layer, thereby substantially shortening the range of temperature change of the railroad, realizing the synchronous thermal expansion between the railroad and a roadbed, just like the synchronous thermal expansion between steel reinforcement and concrete in reinforced concrete, and completely solving the problem of the thermal expansion of the railroad.