48results about How to "Lower temperature value" patented technology

An elastic wave device includes a supporting substrate, a high-acoustic-velocity film stacked on the supporting substrate and in which an acoustic velocity of a bulk wave propagating therein is higher than an acoustic velocity of an elastic wave propagating in a piezoelectric film, a low-acoustic-velocity film stacked on the high-acoustic-velocity film and in which an acoustic velocity of a bulk wave propagating therein is lower than an acoustic velocity of a bulk wave propagating in the piezoelectric film, the piezoelectric film is stacked on the low-acoustic-velocity film, and an IDT electrode stacked on a surface of the piezoelectric film.

An elastic wave device includes a supporting substrate, a high-acoustic-velocity film stacked on the supporting substrate and in which an acoustic velocity of a bulk wave propagating therein is higher than an acoustic velocity of an elastic wave propagating in a piezoelectric film, a low-acoustic-velocity film stacked on the high-acoustic-velocity film and in which an acoustic velocity of a bulk wave propagating therein is lower than an acoustic velocity of a bulk wave propagating in the piezoelectric film, the piezoelectric film is stacked on the low-acoustic-velocity film, and an IDT electrode stacked on a surface of the piezoelectric film.

The invention relates to an inexpensive non-magnetic austenite stainless steel and a manufacturing method thereof. The components comprise, by weight, 0.05-0.12% of C, 0.2-1.0% of Si, 14.0-18.0% of Mn, 16.0-19.0% of Cr, 0-2.0% of Ni, 1.0-3.0% of Cu, 0.1-0.3% of N, 0.001-0.004% of B, and the balance of Fe and unavoidable impurities. According to the present invention, the finished product can maintain the non-magnetic state after 80% of the finished product is subjected to cold rolling reduction; low nickel pig iron with a nickel content of 1-2 wt% and produced by using inexpensive laterite-nickel ore can be adopted as the nickel resource raw material without application of other nickel-containing resources, such that the consumption of the high nickel iron or pure nickel can be substantially saved, and the low cost characteristic is provided; and the inexpensive non-magnetic austenite stainless steel of the present invention has characteristics of no magnetism, high strength, and excellent cold processing performance, and can be widely used in the industries of electrical devices, electronics, instrumentations, springs, zippers and the like.

A solar energy converter comprising: a solar energy absorber, the solar energy absorber comprising a photovoltaic element; a heat transfer element in thermal contact with the solar energy absorber; a primary heat exchanger in thermal contact with the heat transfer element; a secondary heat exchanger; and a heat transfer control element; wherein the heat transfer control element is arranged to selectively place the secondary heat exchanger either in thermal contact with the heat transfer element or out of thermal contact with the heat transfer element.

The invention discloses a control method and device for an air conditioner. The control method comprises the following steps: step 1, acquiring the temperature value in a room with the air conditioner; step 2, comparing the temperature value with a preset temperature interval to obtain a comparison result, and determining a gear according to the comparison result; and step 3, controlling the cold energy of the air conditioner by the gear determined in the step 2, wherein the control device comprises a temperature acquiring module, a gear judgment module and a cold energy control module which are connected successively. Different gears can be selected according to actual demands of a user and the usable area, the outlet air of the air conditioner cannot be too low or too high, and therefore, comfort of the user who uses the air conditioner is improved. In addition, the technical effect of efficiently saving energy is achieved. The control method and device for the air conditioner can meet various demands of the user; rapid refrigeration can be realized; the air conditioner can run in an energy-saving manner; and moreover, the capability is increased along with increasing of horsepower of the air conditioner. After the control method and device for the air conditioner are used, the energy-saving effect of the air conditioner is obvious.

A vibrating device that is in the form of a rectangular plate having opposed long sides and opposed short sides, and that utilizes an expanding and contracting vibration mode in a direction of the short sides. The vibrating device includes a Si layer made of a degenerate semiconductor, a silicon oxide layer, a piezoelectric layer, and first and second electrodes through which a voltage is applied to the piezoelectric layer. When a total thickness of the Si layer is denoted by T1, a total thickness of the silicon oxide layer is denoted by T2, and the TCF in the vibrating device when the silicon oxide layer 3 is not provided is denoted by x(ppm / K), T2 / (T1+T2) is within a range of (−0.0003x2−0.0256x+0.0008)±0.05.

The invention discloses a laminated core type single-collar two-coil redundant axial direction magnetic bearing. According to the structure of the laminated core type single-collar two-coil redundant axial direction magnetic bearing, multiple sets of U-shaped silicon steel sheet laminated components (1) are inlaid in the circumferential direction of a laminated base (2) in the axial direction and fixed through hexagon socket set screws (6) with flat points; and two sets of coils (3) with the same number of turns are connected in parallel in the axial direction and wound on a circular ring composed of the twelve U-shaped silicon steel sheet laminated components. Compared with existing design, the problem that a silicon steel sheet lamination way cannot be adopted for the integral axial direction magnetic bearing is solved, so that the eddy-current loss of the axial direction magnetic bearing is reduced, and the temperature rise of the axial direction magnetic bearing is reduced. Due to the redundant design of the two sets of coils, the axial direction magnetic bearing has analytical redundancy, and working reliability of the axial direction magnetic bearing is improved.

An elastic wave device includes a supporting substrate, a high-acoustic-velocity film stacked on the supporting substrate and in which an acoustic velocity of a bulk wave propagating therein is higher than an acoustic velocity of an elastic wave propagating in a piezoelectric film, a low-acoustic-velocity film stacked on the high-acoustic-velocity film and in which an acoustic velocity of a bulk wave propagating therein is lower than an acoustic velocity of a bulk wave propagating in the piezoelectric film, the piezoelectric film is stacked on the low-acoustic-velocity film, and an IDT electrode stacked on a surface of the piezoelectric film.

The invention belongs to the technical field of air inlet mechanisms, and particularly relates to an air inlet mechanism used for a piston compressor. By aiming at the problem of a small air inlet quantity, the invention now puts forward the following scheme that the air inlet mechanism comprises an air inlet box, wherein the outer wall of the top of the air inlet box is connected with an air guiding pipe through a flange; the outer wall of one side of the air inlet box is provided with air inlets which are distributed at equal distances; the air inlet box is of a structure of which two ends are small and the middle is big; the diameter of each air inlet is 3-6 mm; and the air inlets are positioned in the middle of the air inlet box. The air inlet mechanism is provided with semiconductor refrigeration sheets, a motor, a rotary rod, stirring rods and connecting rods, when the semiconductor refrigeration sheets are started, a temperature value in the air inlet box can be lowered, pressure intensity is caused to be lowered to accelerate speed for air to flow into the air inlet box, and the air inlet quantity is increased in equal time. A motor is started, the motor drives the rotary rod to rotate, the stirring rods are of wave-shaped structures with different shapes, vortexes of different shapes can be generated, and cold air generated by the semiconductor refrigeration sheets canbe mixed.

The invention provides a temperature control circuit for silicon drift detector, comprising: a main control circuit, a first power supply circuit and a second power supply circuit. The first power supply circuit and the second power supply circuit are connected with the main control circuit. The first power supply circuit is a boost power supply circuit; the second power supply circuit is an anti-phase power supply circuit. The boost power supply circuit is connected with an internal temperature detection circuit and an environmental temperature detection circuit. The main control circuit is connected with a temperature feedback circuit through a serial port circuit. The environmental temperature detection circuit is connected with the temperature feedback circuit. The main control circuit and the temperature feedback circuit are connected with a temperature regulating and controlling circuit to solve the problems in the prior art that temperature cannot be preset according to environment, that temperature control response is slow and the fluctuation is large, and that the stable time for the refrigeration temperature of the silicon drift detector is long and the refrigeration temperature is not low enough.

The invention provides an air conditioner control method, an air conditioner control device, a storage medium and an air conditioner. The method comprises the following steps of judging whether the outdoor ambient temperature is greater than or equal to a set ambient temperature judgment value after a compressor of the air conditioner is started; and if the outdoor ambient temperature is judged tobe greater than or equal to the set ambient temperature judgment value, determining whether to control the compressor to stop or not according to whether the power supply voltage of the compressor isgreater than or equal to the set voltage or not so as to perform temperature protection on an Intelligent Power Module (IPM) of the air conditioner. The scheme provided by the invention can avoid theproblem of damage to the IPM of the air conditioner compressor under the condition of high ambient temperature and high voltage power supply.

The invention discloses a method and a device for controlling vehicle-mounted system temperature. The method for controlling the vehicle-mounted system temperature comprises the steps that whether thetemperature value of a vehicle-mounted system CPU within the specific period of time exceeds the first preset temperature is judged; and if the judgment result is yes, the operation load of the vehicle-mounted system CPU is reduced. The temperature change of the vehicle-mounted system CPU in the operation process is monitored, and the method of timely turning off certain functions in use or reducing the operation load of the CPU is used so that the heat produced by operation can be reduced, the temperature value of the whole vehicle-mounted system can be reduced, the vehicle-mounted system can be protected, and the probability of safety hidden trouble caused by instability and hardware damage of the vehicle-mounted system because of excessively high temperature can be reduced.

The invention discloses a vortex expansion machine in the field of expansion machines. The vortex expansion machine aims at solving the technical problems that under the high-temperature condition, the exhaust resistance of the vortex expansion machine is large, the temperature of a work cavity is increased, and heat deformation of vortex teeth is increased. The vortex molded line of the vortex expansion machine is a various-base-radius involute. A fixed-base-radius involute vortex expansion is adopted as a prototype, and vortex teeth are machined according to the various-base-radius involuteunder the condition that the vortex tooth height, the vortex tooth spread angle, the tooth head correction parameter and the initial base radius are maintained unchanged. Compared with an original expansion machine, flowing in a back pressure cavity is improved, the temperature of the movable vortex teeth and the static vortex teeth is reduced, the heating effect of an air suction and collection chamber on the work cavity is weakened, and the deformation of the vortex teeth is reduced.

A vibrating device that is in the form of a rectangular plate having opposed long sides and opposed short sides, and that utilizes an expanding and contracting vibration mode in a direction of the short sides. The vibrating device includes a Si layer made of a degenerate semiconductor, a silicon oxide layer, a piezoelectric layer, and first and second electrodes through which a voltage is applied to the piezoelectric layer. When a total thickness of the Si layer is denoted by T1, a total thickness of the silicon oxide layer is denoted by T2, and the TCF in the vibrating device when the silicon oxide layer 3 is not provided is denoted by x(ppm / K), T2 / (T1+T2) is within a range of (−0.0003x2−0.0256x+0.0008)±0.05.

The invention concerns a method for limiting the ageing of at least one catalyst in an exhaust line of a motor vehicle, said catalyst being located upstream of a particle filter, the temperature upstream of the filter being, during a regeneration, sufficient to burn the soot that it contains, said temperature being obtained by additional injections of fuel into the line during regeneration, characterized by the step of determining a temperature setpoint (PF Tupstream Setpoint) upstream from the filter and a dosing setpoint (Diesel Dosing Setpoint) for the additional injections of fuel, the two setpoints being determined on the basis of the distance travelled by the vehicle since a new catalyst was provided (Distance since new DOC) or a model of catalyst damage (DOC Damage Model) according to at least the estimated or measured temperature (estimated or measured Tintra DOC) of the catalyst.

The invention relates to a vanadium extraction coolant and a preparation method and a use method thereof which belong to the field of metallurgy. The invention provides a novel vanadium extraction coolant and overcomes the defects of complex use of the existing coolant and the large operation difficulty of the existing vanadium extraction technique. The vanadium extraction coolant comprises 80 to 95 percent of the oxides of iron, 3 to 6 percent of SiO2, 0.1 to 0.6 percent of V2O5, 1 to 3 percent of MgCl2 and the rest is less inevitable unpurified elements; the total amount is 100 percent. The vanadium extraction coolant of the invention is collocated and pressed by adopting iron concentrate powder containing vanadium and ferric oxide (or vanadium extraction mud) with a bonding agent which not only has a simple preparation method, but also has high cooling intensity; besides, the using method is simple during the process of using the vanadium extraction; the vanadium extraction technique is more smooth; the quality of the vanadium slag and the quality of gun iron are more stable; the invention fully recycles the most resources of iron and vanadium in the coolant simultaneously when achieving the goals of ''removing vanadium and preserving carbon''.

The invention provides a heat dissipation control method, device and system, an apparatus, and a machine-readable medium. The method comprises: determining, by obtaining the temperature value of a target object as a current temperature value, whether the current temperature value reaches a preset temperature threshold value; if so, executing the motor drive, and opening a preset heat dissipation channel; operating a fan and instructing, by the fan, the air to enter an area where the target object is located from the heat dissipation channel, and / or instructing the air in the area where the target object is located to flows out of the heat dissipation channel, so that the temperature value of the target object is lower than the preset temperature threshold value; ff the humidity reaches a preset humidity threshold, executing the motor drive to close the opened preset heat dissipation channel to ensure the waterproof performance of a terminal device in a heat dissipation state. The heatradiation control method not only can discharge the heat of the terminal device, but also can ensure the waterproof performance of the terminal device during the heat radiation process.

The utility model provides a drawer-type low-voltage switch cabinet. The drawer-type low-voltage switch cabinet comprises a cabinet body and a heat dissipation system, the cabinet body comprises an accommodating space, a water cooling space and a drawer; the heat dissipation system comprises a water cooling assembly, a plurality of heat dissipation assemblies and a plurality of temperature sensors, each water cooling assembly comprises a water cooling coil pipe, a water supply pipeline, a circulating pipeline and a water pump arranged on the water supply pipeline, the water supply pipeline is communicated with the water inlet ends of the water cooling coil pipes, the circulating pipeline is communicated with the water outlet ends of the water cooling coil pipes, and the heat dissipation assemblies are heat dissipation fans. According to the drawer-type low-voltage switch cabinet provided by the utility model, the temperature sensor is installed in the accommodating space and used for monitoring the temperature in the drawer in real time, when the temperature is greater than the threshold value, the cooling fan is turned on for cooling, the water-cooling space is arranged at the bottom of the drawer, and the water-cooling coil pipe is installed in the space and used for cooling the drawer in a water-cooling manner. By adopting the two modes, the temperature in the drawer can be quickly reduced.

A solar energy converter comprising: a solar energy absorber, the solar energy absorber comprising a photovoltaic element; a heat transfer element in thermal contact with the solar energy absorber; a primary heat exchanger in thermal contact with the heat transfer element; a secondary heat exchanger; and a heat transfer control element; wherein the heat transfer control element is arranged to selectively place the secondary heat exchanger either in thermal contact with the heat transfer element or out of thermal contact with the heat transfer element.

The invention discloses a hot melting device for waste copper foil tape recycling. The hot melting device for waste copper foil tape recycling comprises a recycling box. The outer wall of the top of the recycling box and the inner wall of the bottom of the recycling box are both fixedly provided with fixing rods. The other ends of the fixing rods are provided with heating plates. A temperature displaying mechanism is arranged on the inner wall of one side of the recycling box. A clearing mechanism is fixed to the inner wall of the recycling box. The outer wall of one side of the recycling boxis provided with a motor seat. The outer wall of the motor seat is provided with a motor. The two sides of the inner wall of the recycling box are fixedly provided with the same cross plate. The outerwall of one side of the cross plate and the inner wall of the recycling box are connected with two rotating rods through bearings. The temperature displaying mechanism comprises a temperature sensor.According to the hot melting device for waste copper foil tape recycling, the top and the bottom of the recycling box are provided with the fixing rods and the heating plates, the outer walls on thetwo sides of copper foil tape can be heated, it is guaranteed that the copper foil tape is evenly heated, the copper foil tape can be conveniently coiled, and the practicability of the hot melting device for waste copper foil tape recycling is improved.

The invention discloses a strontium ferrite magnetic powder additive and belongs to the technical field of magnetic material processing. The strontium ferrite magnetic powder additive is prepared from the following specific substances: bismuth trioxide, calcium chloride, vanadic oxide, magnesium oxide, sodium silicate, and barium carbonate. The prepared additive is capable of effectively improving the overall characteristic of the strontium ferrite magnetic powder, enhancing the intrinsic coercive force and magnetic remanence intensity thereof, reducing the processing temperature by about 200 DEG C and favorably saving the manufacturing cost, and is relatively high in popularization and use values.

The invention relates to a gradient coil for a magnetic resonance imaging device, comprising a main coil (10), a shielding coil (20), at least one insert (30) and a casting body (40). The main coil isused for forming a gradient imaging magnetic field. The shielding coil is arranged around the main coil and is separated from the main coil. The shielding coil is used for forming a gradient shielding magnetic field. Each insert comprises a phase change material and is arranged to be in contact with the main coil and / or the shielding coil. And the pouring main body, the main coil, the shielding coil and the at least one insert form a pouring whole through pouring so as to fix the mutual positions of the main coil, the shielding coil and the at least one insert. The gradient coil is small in temperature fluctuation in the using process, high in imaging quality, small in size and capable of saving energy. In addition, the invention further provides a magnetic resonance imaging device comprising the gradient coil.

The invention relates to an electrode-less gas discharge lamp, which comprises the following parts: a vacuum sealed bulb (1) provided with a cavity (2), which is filled with ionizable metallic vapor and rare gas; a heat transfer element (3), which is positioned in the cavity partly at least; magnets (4) fixed on the heat transfer element; and a coil (5) which is wrapped around a central cylinder formed by the magnets and the heat transfer element. The electrode-less gas discharge lamp is characterized in that the magnets are cylindrical magnets of which the cross section is fan-shaped and the number of the magnets is at least two, the heat transfer element is a metal cylindrical body and at least one section of the cylindrical body in the metal cylindrical body is provided with a plurality of lateral surfaces with planar shapes, and each magnet is fixed on the lateral surfaces with planar shapes of the metal cylindrical body. The electrode-less gas discharge lamp has a simple structure, and the temperature of the magnets is low.

The invention discloses an economic management teaching demonstration device. The economic management teaching demonstration device comprises a bottom plate. The top of the bottom plate is welded witha side baffle. The left side of the top of the side baffle is movably mounted with a first rotating shaft, and an outer wall of the first rotating shaft is sleeved with a first painting brush and a first gear; a right side of the first gear is meshed with a second gear, a right side of the second gear is meshed with a third gear, and a right side of the third gear is meshed with a fourth gear; the second gear and the third gear are movably mounted on the side baffle; a second rotating shaft is inserted into an axial center of the fourth gear; and one end of the second rotating shaft is movably mounted on the side baffle. The economic management teaching demonstration device can vividly demonstrate and explain a variety of economic concepts by setting a variety of economic management demonstration models; and the consistency of all the demonstration models is high, and all the demonstration models can be connected in series to form a knowledge chain, so that students can deeply understand the economic concepts.

Method for injecting fuel (14a) into a combustion chamber having at least two fuel injectors (12a, 12b, 12c) of a cylinder (11) of a reciprocating internal combustion diesel engine in underload operation comprises alternately injecting the fuel so that during at least two successive working cycles no fuel is injected by at least one of the fuel injectors and during at least two following successive working cycles no fuel is injected by the other fuel injector. An Independent claim is also included for a reciprocating internal combustion engine operated by the method. Preferred Features: Each combustion chamber has two, three or four fuel injectors.

The invention relates to a drilling system and method based on subsea pump pressure control. The system is characterized by comprising a drilling ship; a drilling liquid supplying device and a control device are arranged on the drilling ship; the drilling liquid supplying device is connected with the liquid feeding end of a water faucet through a liquid manifold; the water faucet is fixedly connected to a derrick arranged in the middle part of the drilling ship; the liquid discharging end of the water faucet is in rotating connection with the top end of a drilling rod; a drill bit is fixedly connected to the bottom end of the drilling rod; an absorbing module sleeves the lower part of the drilling rod; two pipelines are symmetrically arranged on the outer pipe wall of the absorbing module; a throttle valve is arranged on the pipeline at one side; the control device is electrically connected to an electrical device positioned on the drilling ship; the electrical device is electrically connected with a motor through a control and power pipeline; the output end of the motor is connected with a subsea pump; an inlet of the subsea pump is connected with a hose and provided with a pressure flow sensor. According to the system, the opening degree of the throttle valve and the rotating speed of the subsea pump can be adjusted by a control panel device through the control and power pipeline, so that the pressure of a wellhead of a subsea drilling well is stable, and as a result, the well control risk caused by natural gas-water composition can be controlled.

The invention provides a water ring device of a down-blowing water-cooling extruder. The water ring device comprises a water ring, a purified water inlet and a purified water outlet, wherein the water ring comprises an annular outer wall, an annular inner wall and a bottom surface, the purified water inlet and the purified water outlet are formed in the annular outer wall of the water ring. The water ring device is characterized in that an air conditioner coiler is arranged in the water ring, the air conditioner coiler is provided with two ports, namely an outlet end and an inlet end, the air conditioner coiler is provided with an air conditioner, the outlet end of the air conditioner coiler is connected with a compressor of the air conditioner, the inlet end of the air conditioner coiler is connected with a throttling valve of the air conditioner, and a refrigerant is filled in the air conditioner coiler. The cooling effect of the upper part of the water ring is enhanced to ensure that the temperature of purified water in the water ring is uniform, the lower temperature value is kept, the transparency of a membrane is enhanced, the qualified rate of a produced membrane is increased, the manufacturing cost and the running cost are low, and the convenience is facilitated.

The invention provides a leakage prevention method. The anti-leakage method is applicable to a heat exchange system including a plate heat exchanger, and the heat exchange system also includes an expansion valve located upstream of the plate heat exchanger; the plate heat exchanger includes a plurality of heat exchange fins and a plurality of sealing gaskets, adjacent The two heat exchange fins are sealed and connected through at least one sealing gasket, and the leakage prevention method includes: obtaining the temperature value K of the sealing gasket; according to the difference between the temperature value K and the first preset temperature value a, and / or the difference between the temperature value K and the second preset temperature value b to control the operation mode of the heat exchange system; where the first preset temperature value a is greater than the second preset temperature value b, the operation of the heat exchange system Modes include reducing the operating frequency of the compressor, increasing the opening of the expansion valve, and maintaining the current operating state. The invention effectively solves the problem of easy leakage at the sealing gasket of the plate heat exchanger in the prior art.