36results about How to "Control heat" patented technology

The invention pertains to the technical field of explosive detonation and explosion propagation equipment and discloses a method for producing a detonating fuse or a detonator delay line with a small diameter and low charge linear density, which comprises the following steps: explosive is charged in an initial pipe body which is made from flexible metal and has wall thickness being one tenth to one third of the outer diameter of the pipe body; during the charge process, the charge linear density of the initial pipe body is calculated by the formula and then the explosive load is determined by a formula, namely M equals to rho1L1; during the continuous drawing process, the modular angle of a used mould is 7-35 degrees; the elongation coefficient of the pipe body in each drawing working procedure is controlled between 1.00 and 1.80; simultaneously, the linear speed of the drawn detonating fuse or the delay line pipe body is controlled within 85m per minute; and after the setting radial dimension is reached by drawing, suitable length is intercepted to obtain a finished product. The method realizes the continuous drawing production and can effectively and safely produce the detonating fuse or the detonator delay line with small diameter and low charge linear density. As the pipe body still has sufficient thickness after being drawn into a finished product, enough strength is ensured to restrict the internal explosive so that the explosive can form detonation and the product quality is effectively guaranteed.

The invention provides an android system based energy-saving control method for an audio power amplifier. The method includes the steps of audio play starting and audio play stopping; in the audio play starting step, type of a current audio event is judged through a kernel audio processing module, and if the current audio event is an audio starting, restoring or release pausing event, the power amplifier is powered on, otherwise the power amplifier is powered off; in the audio play stopping step, type of a current audio event is judged through the kernel audio processing module, and if the current audio event is an audio stopping, suspending or pausing event, the power amplifier is powered off, otherwise the power amplifier is powered on. The method has the advantages that energy consumption of a system is reduced, working temperature of equipment is lowered, energy consumption and working temperature of the power amplifier are reduced maximally, the power amplifier is prevented from being damaged, design of an application framework is simplified, codes can run in a kernel automatically, and intelligent control effect of the system on the power amplifier is achieved really.

The invention discloses an elevator door motor switch-in-place torque control method which comprises the following steps: calculating the synchronization frequency f of a motor and integrating the synchronization frequency f to obtain a coordinate conversion angle theta; calculating an M-axis voltage Um corresponding to an expected torque under an M-T rotating coordinate system; calculating a T-axis voltage Ut corresponding to the expected torque under the M-T rotating coordinate system; performing PARK inverse transform according to the T-axis voltage Ut, the M-axis voltage Um and the coordinate conversion angle theta so as to obtain a voltage under a two-phase static coordinate; performing space vector pulse duration modulation on the voltage under the two-phase static coordinate so as to obtain 6 paths of driving signals; and outputting the 6 paths of driving signals to the motor after passing through an intelligent power module, thus obtaining the expected torque. The torque control method provided by the invention can be used for adjusting the motor torque randomly as required, therefore the method can be used for controlling the heating value of the motor during door motor switch-off maintaining and door motor switching-on maintaining; and in addition, because of open-loop control, coders for vector control are not required, thus the device provided by the invention is simple in structure.

The invention discloses an overheating protection type lithium battery, and the lithium battery comprises a shell and an inner core arranged in the shell; a negative plate and a positive column are inserted into the two ends of the inner core respectively, a control cavity is formed in the shell, an external column is inserted into the side wall of the control cavity in a penetrating mode, and a dripping box is fixed to the inner wall of the control cavity; the inner top of the dripping box is connected with a push plate through an extrusion spring, and a power connection rod penetrating through the top of the dripping box is fixed to the upper end of the push plate. The device has the advantages that the two power connection sheets are communicated through mercury, so mercury is connectedinto the whole power supply circuit, and when the device is heated, dichloromethane expands to cause the push plate to extrude the mercury, so the capacity of the mercury connected into the circuit is reduced, the overall current passing rate is reduced, and the electrifying current of the whole circuit is reduced; therefore, the heat productivity of the battery is controlled, self redeeming is effectively completed, and overheating damage to the battery is avoided.

The invention discloses a cable and feed body connecting method suitable for a deep well type grounding electrode. The method comprises that feed points in a feed body of the grounding electrode are connected with a cable; each feed point is welded to the feed body and the cable via a metal holt hoop iron member; each holt hoop iron member tightly sleeves the feed point of the feed body; the holthoop iron member comprises a first side surface hole and a cable welding hole; the first side surface hole is welded to the feed body, and the cable welding hole is welded to the cable; lead is castedto wrap conductors on all feed connecting points, so that a lead sealing layer is formed in the surface of the metal holt hoop iron members and the feed points; and epoxy resin is poured on the surface of the lead sealing layer to carry out packaging, and an epoxy resin layer is formed for protection. The cable is welded to the feed body via the metal holt hoop iron members, the lead sealing layer and epoxy resin are added for packaging, and on the premise that the connecting reliability is ensured, welding points are avoided from influence by an electrode corroded product and direct participation in electrochemical reaction, and protection is realized.

The invention provides a capacitor constant-power aging circuit and an aging method thereof, which are used for an aluminum electrolytic capacitor constant-power aging device. The circuit comprise a charging power supply output end, a capacitor Cx to be aged, a transistor Q1 and an operational amplifier U1, in addition, a reference voltage REF is also connected to the positive input end of the operational amplifier; the output end of the charging power supply, the capacitor Cx, the transistor Q1 and the resistor R1 form a charging loop, and the resistor R1 is grounded; meanwhile, the input endof the operational amplifier U1 is connected with a feedback circuit and a reverse adder to form a constant current source. The charging current of the capacitor to be aged is dynamically adjusted according to the voltage loaded on the capacitor, so that the charging current is relatively large when the voltage is low, the charging current is automatically reduced along with the rise of the voltage, the heating value of the capacitor during aging is controlled, and electrolyte evaporation caused by over-high temperature is prevented. The quality of the capacitor can be greatly improved, and the service life of the capacitor is prolonged.

The invention relates to a multi-wire cutter, in particular to a multi-wire sawing machine spindle system used for cooling circulating. The multi-wire sawing machine spindle system is characterized in that a front bearing is arranged at the front end of a spindle, a front bush is arranged between the front bearing and spindle, the outer circle of the front bearing is arranged on a front bearing pedestal, two groups of main bearings are arranged at the middle of the spindle, the two groups of main bearings are divided by an inner bush, the outer circles of the main bearings are arranged on a main board bearing pedestal, the front end is pressed by a pressure cover, the rear part is provided with a synchronous belt wheel and a rear bearing, a rear spacer bush is arranged between the rear bearing and synchronous belt wheel, a rear cover is arranged at the rear head face of the spindle, the outer circle of a rear bearing is arranged on a rear bearing pedestal, an oil pipe plug is arranged at the front end of the spindle, and an oil cooling pipe and a rotary joint are arranged at the rear end. Through improving the structure of the multi-wire sawing machine spindle part, the heat value of the spindle is effectively reduced, the service life of each bearing of the spindle is prolonged, and the equipment stability is improved.

The invention discloses a welding machine with wire feeding and wire drawing being conducted alternately and a power supply control method thereof, and belongs to the field of welding machine control systems. The problems that as for an existing gas-shielded electric welding machine, sheets cannot be welded easily and splashing is serious are solved. The power supply control method of the welding machine includes an arcing stage, a short-circuit stage and a drawing stage. At the arcing stage, a constant voltage control mode or a constant current control mode is adopted, and welding wires are fed in at a constant speed. At the short-circuit stage, the welding wires make contact with workpieces, the constant current control mode is adopted, and wire feeding is stopped. At the drawing stage, the constant current control mode or the constant voltage control mode is adopted for controlling the heating amplitude of the workpieces, and the welding wires are drawn at a constant speed. The welding wires are reset to the arcing stage after the drawing stage is completed. According to the welding machine with wire feeding and wire drawing being conducted alternately and the power supply control method thereof, different control mode circuits are used in different welding stages, and a wire feeder rotates forwardly or reversely in an associated mode for wire feeding or wire drawing, so that the effects of reducing arc heat, being capable of welding the sheets and reducing splashing are achieved.

The invention discloses a preparation method of infant rice flour with functions of quick solubility and easy digestion. The method comprises the following steps: firstly, grinding and sieving raw material rice, pulping the rice with water, performing dissolving and uniformly mixing to prepare rice milk with the mass percent concentration of rice flour in the mixture being 15-20%, and then passing the rice milk twice through a colloid mill to obtain milled milk; then, adding high-temperature-resistant alpha-amylase and an enzyme activity accelerant into the milled milk, performing enzymolysis for 30-60 minutes at the temperature of 80-90 DEG C, detecting the DE value after enzymolysis, and performing enzyme deactivation to obtain enzymatic hydrolysate; thirdly, performing spray drying on the enzymatic hydrolysate for 5-10 seconds at the air inlet temperature at 170-180DEG C and the air outlet temperature at 90-95DEG C to obtain the product infant rice flour; and finally, detecting the DE value, the water solubility index WSI and the in-vitro digestion performance of the infant rice flour. According to the prepared infant rice flour, the palatability, the brewing performance and the digestion and absorption performance of the infant rice flour can be effectively improved.

The invention discloses an intelligent anti-freezing system and method applied to an air cooling island. The intelligent anti-freezing system comprises a upstream area anti-freezing device, a downstream area anti-freezing device, an intelligent anti-freezing control system and an infrared thermal imager used for detecting the heat exchange condition of finned tubes on the two sides of a cooling unit; the infrared thermal imager is connected with the intelligent anti-freezing control system, and the intelligent anti-freezing control system is connected with the upstream area anti-freezing device and the downstream area anti-freezing device. According to the intelligent anti-freezing system, an air cooling finned tube is divided into the high freezing risk area, the medium freezing risk areaand the low freezing risk area, the partition anti-freezing strategy is adopted, and the problem that in the prior art, the anti-freezing effect of the downstream area and the anti-freezing effect ofthe upstream area are inconsistent is solved. An intelligent anti-freezing control system is adopted, the unfolding length of the anti-freezing electric heating heat preservation curtain and the heating value of an electric heating belt in the anti-freezing electric heating heat preservation curtain are finely controlled, the temperature of condensed water in the air cooling finned tube is kept above the freezing temperature, and the optimized anti-freezing effect is achieved.

Heating manners of existing marshmallow makers include gas heating and electric heating. If the marshmallow is heated with open fire, certain potential safety hazard exists in making of marshmallow, and in making, temperature is hard to control, and therefore, the quality of the marshmallow is hard to ensure. The invention provides the direct-current electric heating marshmallow maker which comprises a rack, a direct-current motor, a rotating shaft, a rotating shaft fixing device, a marshmallow discharge device and a storage battery, wherein the storage battery is electrically connected with the direct-current motor; the rotating shaft is arranged on the rotating shaft fixing device by a bearing, one end of the rotating shaft is connected with the direct-current motor by belt driving, and the other end of the rotating shaft is provided with the marshmallow discharge device; and the marshmallow discharge device comprises a heater and a holding disk, the heater is electrically connected with an electric brush, the storage battery is electrically connected with the electric brush, and a temperature regulation switch is arranged.

The invention discloses a barbecue machine comprising a barbecue box and a distribution box which are mutually connected; the barbecue box is fixedly provided with a heating tube therein; the distribution box is provided with a solid-state voltage regulator which is connected with a power supply; the solid-state voltage regulator is connected with the heating tube through wires; a potentiometer is installed on the solid-state voltage regulator; the bottom surface of the heating tube is plated with heat reflectance coating material for heat insulation. By means of the barbecue machine, during barbecue, the heat generated by the heating tube can be fully utilized and thermal power efficiency is increased by about 50%; The fire of the barbecue machine can be adjusted according to different conditions; the caloric power of the heating tube can be changed with ease so that multiple foods can be baked and demands can be met; compared with traditional devices, the barbecue machine has electric baking function which is safe, healthy, energy saving and environmentally friendly; besides, the barbecue machine is reliable, stable, safe, practical and has low failure rate and simple structure which is suitable for large scale popularization and application.

An aspect of the present disclosure provides a vehicular wireless communication device (1) which is mounted on a vehicle and performs communication with the outside of the vehicle. The vehicular wireless communication device (1) is provided with: a radio wave transmitting unit (33) having the function to transmit radio waves; a radio wave reception unit (33) having the function to receive radio waves; a positioning unit (34) having the function to perform positioning; a temperature acquiring unit (S110) configured to acquire the temperature of the vehicular wireless communication device; and a function control unit (S130, S240) configured to suppress or resume a plurality of functions among the function to transmit radio waves, the function to receive radio waves, and the function to perform positioning, in response to the temperature.

A charge management circuit for a power lithium battery pack is composed of a boost circuit, a voltage monitoring circuit, and a shunt control circuit. The charger adopts the design of energy-saving shunt method, adding a bypass resistor to each battery. When a single battery is higher than other batteries in the group, all or part of the charging current is introduced into the bypass resistor, so as to realize the charging of each cell. The balanced charging of the whole battery, the circuit structure is relatively compact, and the energy-saving file battery pack equalization charger designed by the shunt method solves the problem of unbalanced charging of the battery pack, effectively prevents overcharging, and improves the use of the file battery. Safety, increases the charging capacity of the battery pack, prolongs the service life of the lithium battery pack, controls the heat generation, and ensures the long-term stable operation of the charger.