43results about How to "High precision temperature control" patented technology

In a tip for an electric soldering iron 3 made of copper or a copper alloy, the outer surface of the tip 3a except the part thereof coated with a solder 9 is coated with a mixture of Al particles and flux, and then the Al particles alone are molten in an inert gas atmosphere, to thereby modify said outer surface so as to have a Cu-Al alloy coating layer of a high Al concentration 10-1. As a result, without using Cr plating, it is possible to provide an electric soldering iron having an excellent resistance to oxidation under high temperature environment and a high heat conductivity.

The invention provides a hot-pressing roll device for a cloth tape winding machine. The hot-pressing roll device comprises a hot-pressing roll body, a central shaft, an electric heating tube and a bushing, wherein the hot-pressing roll body is of a hollow cylindrical structure of which one end is opened; the bushing is arranged at the opening end of the hot-pressing roll body and is connected with the hot-pressing roll body through a bearing in a sealing way; a central shaft penetrates through along a central line of the hot-pressing roll body; one end of the central shaft is connected with the hot-pressing roll body through a bearing in a sealing way; the bushing penetrates through the other end of the central shaft and is fixedly connected with the other end of the central shaft; the electric heating tube is a spiral electric heating tube; and the electric heating tube is arranged inside the hot-pressing roll body and is coaxial with the hot-pressing roll body. When the hot-pressing roll body rotates, the bushing and an electric heater fixed on the bushing do not rotate, and thus on one hand, the external connection of a power supply is facilitated, and on the other hand, a sensor can be arranged in the hot-pressing roll body for measuring the temperature, and thus temperature control with high precision can be realized.

The invention discloses an air-conditioning inner partition wall panel, which is hollow, and is provided with semiconductor cooling fins, cooling fins and fans inside; the cooling surface of the semiconductor cooling fin is connected with the inner side of the outer wall surface of the inner partition wall panel, The heating surface is connected with the heat sink; the upper part of the inner partition wall is provided with a ventilation hole; the ventilation hole is connected with the hollow part of the inner partition wall. The inner partition wall panel of the invention can directly use the direct current of the photovoltaic power supply, and has a simple structure and convenient installation.

The invention relates to a temperature control device, in particular to a temperature control device applied to a single resistance micro hot plate, comprising a test current circuit and a heating current circuit. The temperature control device applied to the single resistance micro hot plate has the following advantages: (1) the test current circuit with an adaptive adjustment function is designed, and for different target operating temperatures, the circuit can automatically switch to the appropriate test current to reduce the temperature fluctuation range, thus achieving high-precision temperature control; (2) a clock generation circuit with a microsecond level period is designed, the internal integration of the clock signal circuit is realized, and high integration is realized; and (3)a heating mode control circuit is designed, which can realize switch between a continuous heating mode and a gap heating mode through a heating mode control signal, and can control the heating cycleand duty ratio of the gap heating mode, so as to achieve low power consumption.

The invention discloses a method for adjusting and controlling the surface wettability of a PA3200 3D printing moulding workpiece through annealing treatment, belonging to the technical field of 3D printing and medical application. According to the method, the PA3200 3D printing moulding workpiece is manufactured by utilizing a 3D printing SLS (Selective Laser Sintering) technique; the moulding workpiece is annealed by adopting a tubular vacuum furnace; the tubular furnace has the advantages of being simple in operation, capable of high-precision temperature controlling, capable of working atvarious atmospheres and the like; heating up time is set to be 1-3 hours; temperature maintaining time is set to be 1-5 hours; cooling time is set to be 1-3 hours; annealing temperature is set to be 100 DEG C-160 DEG C; the annealing atmosphere contains oxygen and nitrogen; and the moulding workpiece is subjected to annealing treatment according to the set parameters. After annealing treatment, the contact angle of the surface of the moulding workpiece is changed from 121 degrees to 60 degrees; and the surface wettability is changed from hydrophobicity to hydrophility, so that the surface wettability of the PA3200 3D printing moulding workpiece is effectively adjusted and controlled.

A heating device (1) has a heating element (10) capable of generating heat energy when receiving an electric power, and a power supply control module (20) for performing a power supply so that a plug resistance value R GP of the heating element becomes equal to a target resistance value R TRG . The heating element and the electric power supply control module are accommodated together in a housing casing (30) of a cylinder-like shape. The power supply control device (20) has a reference resistance value storage means (231) for storing a resistance value of the heating device, as a reference resistance value R C , at a predetermined target temperature T TRG , a resistance value change reflecting means (233) and a deterioration judgment means (234). The resistance value change reflecting means (233) allows the power supply to the heating element (10) when the plug resistance value R GP of the heating element (10) is lower than the reference resistance value R C during the power supply to the heating element (10), and halts the power supply to the heating element (10) when the plug resistance value R GP of the heating element (10) exceeds the reference resistance value R C during the power supply to the heating element (10) in order to reflect, to the power supply control, the resistance value change due to the temperature change of the heating element (10). The deterioration judgment means (234) judges whether or not the heating element (10) is deteriorated by using a deterioration power value P WRN in a deterioration state, as a power threshold value P REF , calculated by multiplying an initial reference power value P INT with a predetermined rate.