31results about How to "Prevent temperature deviation" patented technology

In an exhaust gas control apparatus for an internal combustion engine (1) of the invention, including an exhaust gas control catalyst (8) which purifies exhaust gas released from the internal combustion engine (1), and a fuel supply valve (10) which supplies fuel to a portion upstream of the exhaust gas control catalyst (8), the fuel supply valve (10) is operated such that a cycle formed by combining a fuel supply period in which fuel is supplied from the fuel supply valve (10) and a fuel supply stopped period in which fuel is not supplied is repeatedly performed in order to control the temperature of the exhaust gas control catalyst (8) to the target temperature. The arrangement of the fuel supply period and the fuel supply stopped period is controlled such that the temperature of the exhaust gas control catalyst (8) at each of a starting point (P1) and an ending poring (P3) of each cycle is equal to the target temperature.

An electric roasting pan according to the present invention comprises: a roasting pan; a heating layer being in surface contact with the roasting pan and comprising a carbon nanotube and a silicone-based adhesive; and an electrode in contact with the heating layer. The electric roasting pan has excellent thermal efficiency thanks to the minimal heat loss thereof, can reach a target temperature within a short time to reduce a preheating time, and affords excellent cooking quality. Furthermore, the electric roasting pan can substantially prevent the occurrence of temperature deviation across thearea of the roasting pan during a temperature increase and is of high durability and safety.

The invention relates to a heat treatment device, which is characterized in that it comprises: a first linear furnace and a second linear furnace, respectively having an input end and a discharge end; crawlers, which run through the first linear furnace and the second connected to the linear furnace; at least one trolley, which moves along the crawler belt, can pass through the first linear furnace and the second linear furnace, and load the material to be processed; and a gas supply part, which is connected to the table The car is connected and supplied with gas. Therefore, the present invention can eliminate the area for supplying excess heat, effectively use heat energy, and prevent temperature deviation, thereby further improving product quality.

The present invention relates to a substrate seating unit which maintains a constant distance between a tray and a chuck fixated by a clamp. According to an embodiment of the present invention, the substrate seating unit includes: the chuck installed inside a chamber of a substrate processing device; the tray having a plurality of substrate seating grooves, wherein the substrates are inserted on the surface and installed on a chuck surface; and the clamp pressurizing the edge of the chuck and the tray to fixate the edge of the chuck and the tray. A spacer is protruded from the center of a bottom surface of the tray or the center of the chuck surface.

The invention provides a heater assembly and a joint head provided with the same. The heater assembly may include: a housing, an internal accommodation space, and a cooling gas inflow port communicating with the housing; a heater coupled to the housing; and a porous block disposed in the accommodation space.

The invention discloses an online detection and control experimental device for the welding temperature of an electric resistance welding steel pipe. The online detection and control experimental device is mainly characterized in that the side, facing a high-frequency generator, of the upper portion of a rack is perpendicularly connected with one end of a supporting rod; connecting pieces are connected to the supporting rod at intervals in a sleeving manner; the top of each connecting piece is further provided with an upper screw hole communicating with a middle through hole, wherein a set screw is arranged in the upper screw hole; a connecting lug is arranged below each connecting piece, and a colorimetric temperature measurement device is installed on each connecting piece through the corresponding connecting lug; one set of temperature measuring assembly is composed of one connecting piece, the corresponding set screw, the corresponding colorimetric temperature measurement device, a corresponding bolt and a corresponding nut on the supporting rod, and three to six sets of temperature measuring assemblies are arranged. Each colorimetric temperature measurement device is connected with a computer through a signal line, and the computer is also connected with the high-frequency generator and an output device of the high-frequency generator through a signal line to from a closed-loop control system. According to the online detection and control experimental device for the welding temperature of the electric resistance welding steel pipe, the phenomenon that the temperature for welding the vertex of a V-shaped opening angle is directly measured is avoided, the influences of mist generated by cooling liquid on measurement of the welding temperature are reduced, the welding temperature is accurately controlled, and the quality of the welding pipe is ensured.

The invention relates to a prepreg automatic laying process parameter determination device, which belongs to the technical field of composite material automatic forming equipment design and is used for the simulation verification of the automatic laying process parameters of prepregs. The test device includes: a speed control unit, a pressure control unit, a temperature control unit, a control device and a data processing module. The prepreg data processing module (1) provides preset pressure to the prepreg through the flexible pressure roller (10) according to the set servo mechanism (8), sets the working parameters of the stepping motor (5), and sets the heating The constant temperature provided by the device (12) to the worktable (11) and the bonding force and strain force of the prepreg after the set laying process test are due to the optimal bonding force of the specific prepreg for laying and strain force are measurable data, and the best laying process parameters are determined according to the best bonding force and strain force of prepreg by adopting the reverse verification test method.

The invention relates to a parameter measuring device in petrochemical production process. A device for installing a thermocouple on a reactor in propenoic acid production is characterized in that a short flange tube is arranged on a sealing cover of the reactor; a flange is equipped on the short flange tube; a straight connecting head is arranged on a flange cover; a movable clamping sleeve is arranged on the straight connecting head; the thermocouple is arranged inside the movable clamping sleeve; a fin is arranged on the thermocouple; and a spring is arranged at the lower end of the thermocouple. The device has the advantages of simple structure and easiness in manufacturing, solves the problem that a multi-point thermometer of a propenoic acid oxidation reactor is vertically installed, greatly reduces the difficulty in installing a catalyst, reduces the installation cost and ensures that the installation position of the thermometer is accurate; the temperature detection of the propenoic acid oxidation reactor is reliable and accurate; products in propenoic acid production are good in quality, the conversion rate of the propylene is high, the production in the oxidation process of the propylene is safe, the catalyst is prevented from cocking phenomenon in propylene production, and the service life of the catalyst is prolonged.

The invention relates to a measuring device for detecting resistors in air-condition circuits automatically, which comprises a measuring main circuit module, a display module and a buzzer alarming module. The measuring device is characterized in that the measuring device comprises a clamp for clamping a measured air-condition circuit board; a plurality of pairs of thimbles on the clamp contact both ends of the resistors on the measured air-condition circuit board respectively, so that the resistors are respectively connected to the respective measured circuit; voltage signals are extracted by the thimbles and are connected to each signal input end of the main circuit module; the main circuit module calculates a value of each measured resistor according to a voltage value of each inputted signal and a line and an element parameter of each measured circuit and compares the value of each measured resistor with a design value of each resistor; and the signal output end of the main circuit module is connected to the display module and the buzzer alarming module, so that a comparison result is displayed and subjected to alarm reminding. The measuring device has the advantages of simple structure, low cost, accurate detection, convenient and quick operation and capability of improving the production efficiency.

The invention relates to a device for measuring the thermal history curve of a melt in a pulse current liquid level disturbance solidification fine-grain process, which belongs to the technical field of material processing. The device mainly includes a pulse power supply, parallel electrodes, heating wires, lifting rods, ceramic tubes and plugs; the heating wires are connected to 220V alternating current through the plugs, the parallel electrodes are connected to the pulse power supply, and a casting mold filled with metal blocks is placed on the lifting rods; The wire heats up to melt the metal block; then the lifting rod rises to insert parallel electrodes into the metal melt, and apply pulse current to the liquid level to disturb the treatment; at the same time, the thermocouple is also inserted into the melt and fixed, and the thermal history curve of the melt is measured. Compared with the traditional temperature measuring method, the present invention saves the pouring process, can measure the thermal history curve of the melt more stably and accurately, and provides reliable thermal historical data of the melt for the pulse current liquid level disturbance solidification fine-grain process.

The invention discloses a refrigerating system for a refrigerating device. The refrigerating system comprises a compressor, an evaporator and a temperature controller, wherein the temperature controller comprises a temperature sensing bag, an evaporator temperature sensing tube which is arranged on the evaporator, is used for sensing the temperature of the evaporator and is connected with the temperature sensing bag, an outer temperature sensing tube which is used for sensing the temperature in the outer environment of the refrigerating device and is connected with the temperature sensing bag, and a contact sheet, the temperature sensing bag and the contact sheet are connected, and the contact sheet is driven by the temperature sensing bag through the expansion and the contraction to switch on or off the compressor power supply loop of the compressor. According to the refrigerating system for the refrigerating device, control buttons and manual adjustment are not required, temperature control of a refrigerator is completely automatic, the compensation action is played to the changes of environment temperature through the arrangement of the outer temperature sensing tube, the accurate temperature control of the temperature in the refrigerator can be realized, and temperature deviation caused by the manual adjustment is avoided.