11results about How to "Reduce heating area" patented technology

The invention discloses vacuum glass and a preparation method thereof. The preparation method comprises the following steps: grinding corners on one sides of the back surfaces of two glass sheets to form notches; tempering the two glass sheets, coating the outer edges of the back surfaces of the glass sheets with a first solder, and forming a notch; combining the two glass sheets; sealing the two glass sheets for the first time after the two glass sheets are combined; a getter is placed in the cavities of the two glass sheets through the notches in the sealing frame; sintering the second welding flux to form an inlaying piece and inserting the inlaying piece into the notch, wherein one end of the inlaying piece is arranged towards the cavity; elastic pressurizing devices are mounted on the two glass sheets, and the elastic pressurizing devices elastically abut against the other ends of the inlaying pieces; and sequentially carrying out vacuumizing and secondary sealing on the two glass sheets, so that vacuum is formed in the cavity, and the second welding flux is molten to seal the notch. The invention solves the problem that the solder at the vacuum lower edge part is easy to foam when being heated at high temperature in the existing vacuum glass preparation method.

The invention relates to the technical field of plastic welding, in particular to a hot air plastic welding gun which comprises a power connection control mechanism, a central air conveying mechanism and a multi-channel temperature increasing mechanism, the central air conveying mechanism is installed at the upper end of the power connection control mechanism, and a heat insulation air guide mechanism is installed at the upper end of the central air conveying mechanism; a multi-channel temperature increasing mechanism is installed on the inner side of the heat insulation air guide mechanism. The power connection control mechanism comprises a ventilation bottom cover. By adopting the square brushless motor, the installation gap can be effectively enlarged, maintenance, disassembly and assembly are convenient, dust accumulation is avoided, air is conveniently and uniformly heated and intensively output through diversion of multiple channels, and the plastic welding speed and quality are effectively improved; the problems that according to an existing hot air welding gun, a cylindrical brushless motor is used for conveying air, the installation gap of the brushless motor is small, disassembly, assembly and overhaul are inconvenient, dust is prone to being accumulated, airflow is inconvenient to evenly heat, the heating effect is poor, and the welding quality and the welding speed are affected are solved.

The utility model discloses a kind of flat bottom dual-fuel injector structure and dual-fuel engine, including the injector body, middle body and needle valve body sequentially connected from top to bottom, the inside of the needle valve body is provided with first fuel needle valve, the inside of the first fuel needle valve is provided with second fuel needle valve, the bottom surface of the first fuel needle valve and the bottom surface of the needle valve body are located on the same plane, a plurality of first fuel injection holes are provided on the needle valve body, the bottom of the first fuel needle valve is provided with a plurality of second fuel injection holes, the injection cone angle of the second fuel injection hole is less than set angle;The bottom of the dual-fuel injector of the utility model is plane structure, so that the heated area of fuel injector exposed in combustion chamber is reduced, the temperature of fuel injection hole can be effectively reduced, so as to reduce the risk of coking.

The utility model discloses a detection device for a battery. The detection device comprises a battery and a heating device, the battery is cylindrical, and a to-be-heated area is formed on the peripheral surface of the battery; the heating device is arranged on the periphery of the battery, an arc-shaped heating surface is formed on the heating device, and the arc-shaped heating surface covers the to-be-heated area and is in surface-to-surface fit with the to-be-heated area so as to uniformly heat the to-be-heated area. According to the detection device provided by the utility model, the to-be-heated area is defined on the battery, and the to-be-heated area is heated through the arc-shaped heating surface on the heating device in a surface-to-surface fitting manner, so that external heat can be concentrated on the to-be-heated area on the battery, the heating area is reduced, and the heating uniformity is improved; and the triggering experiment of the battery thermal runaway can be more stable.

The present invention provides a wafer-carrying mother disk and a wafer-carrying device and MOCVD equipment having the same. The present invention relates to the technical field of MOCVD equipment manufacturing. The wafer-carrying mother disk is provided with an axial hole, a receiving groove and a through hole arranged at intervals. The axial hole is arranged in the middle of the wafer-carrying mother disk and is suitable for penetrating a driving shaft. The receiving groove is arranged at intervals along the circumference of the axial hole and is suitable for accommodating a wafer-carrying sub-disk. The through hole penetrates the wafer-carrying mother disk along the thickness direction of the wafer-carrying mother disk. The through hole is arranged between the receiving groove and the axial hole, and / or the through hole is arranged between the axial hole and the peripheral edge of the wafer-carrying mother disk and close to one side of the axial hole. According to the wafer-carrying mother disk of the present invention, a through hole is provided, and the central area of ​​the wafer-carrying mother disk can release temperature stress to the position of the through hole, thereby preventing the wafer-carrying mother disk from being damaged, thereby improving the service life of the wafer-carrying mother disk, reducing production costs, and at the same time, reducing the heating area and reducing energy loss.

The utility model provides a special plate-type shunt for large-current charging and discharging of a new energy vehicle, which comprises a PCB (Printed Circuit Board) and a plate-shaped resistor, the plate-shaped resistor comprises a manganese-copper plate body and red copper plate bodies on two sides, and the manganese-copper plate body is respectively welded and fixed with the red copper plate bodies on two sides; equipotential difference notches are respectively formed in red copper plate bodies on two sides of the plate-shaped resistor, and any positions of the inner wall and the edge of each equipotential difference notch are equipotential; the PCB is placed on the upper side of the plate-shaped resistor and fixedly connected with the plate-shaped resistor through vacuum reflow soldering, the PCB is provided with two sampling wiring terminals corresponding to the red copper plate bodies, and the sampling wiring terminals make contact with the inner walls and the edges of the equal-potential-difference notches of the red copper plate bodies. Due to the fact that any position of the inner wall and the edge of each equal-potential-difference notch is equal in potential, a sampling wiring terminal of the PCB only needs to be in contact with any position of the inner wall and the edge of each equal-potential-difference notch, and it is guaranteed that the temperature and resistance value change corresponding report of a current device of the plate-shaped resistor is kept consistent with that of a current product.

The present invention discloses an integrated throat model support rod for subsonic shroud ablation test, including a throat shell, a model connecting block, a connecting tube and a connecting rod. The throat shell is installed on the outside of the model connecting block, and the connecting tube and the connecting rod are concentrically installed at one end of the model connecting block, and the connecting tube is on the outside of the connecting rod. The throat shell, the model connecting block, the connecting tube and the connecting rod are integrated into one by welding, thereby increasing the integration of the device and reducing the heated area. Through the integrated water-cooling structure design between the throat shell, the model connecting block, the connecting tube and the connecting rod, the cooling effect of the device is enhanced, the cooling water inlet and outlet interface is simplified, and the interface is kept away from the high enthalpy airflow, thereby improving the reliability of the device under the high enthalpy airflow state.

This application provides an arc-extinguishing system and a circuit breaker, belonging to the field of electrical equipment technology. The arc-extinguishing system provided in this application includes a stationary contact, an arc-extinguishing chamber, and a stationary cover. The stationary contact includes a fixed part and a contact part connected to each other. The fixed part is connected to the base of the circuit breaker, and the contact part has a guide groove that extends through the contact part. The arc-extinguishing chamber is disposed on the contact part. The stationary cover is disposed on the portion of the contact part that does not contact the arc-extinguishing chamber. A hook and a limiting block are provided on the side of the stationary cover facing the contact part. The hook passes through the guide groove and hooks to the side of the contact part facing away from the stationary cover. The limiting block is located within the guide groove and contacts the groove wall. The stationary cover mentioned in this application can limit the position of the stationary cover in the thickness, length, and width directions of the stationary contact, reducing the probability of changes in the relative position between the stationary cover and the stationary contact. This improves the shielding efficiency of the stationary cover on the contact part, thereby increasing the reliability of the arc-extinguishing system.

The utility model discloses a tea leaf fixation hot-blast stove which comprises a box body and a hot air chamber arranged in the box body, one end of the hot air chamber is provided with a hot air outlet, a combustion chamber is arranged in the hot air chamber, the combustion chamber is connected with a group of heat exchange box bodies in series, and the tail ends of the heat exchange box bodies are connected with a smoke exhaust device. An air inlet chamber is arranged at one end of the hot air chamber in the box body, a group of heat exchange pipes communicated with the air inlet chamber are arranged in the heat exchange box body, and air in the air inlet chamber sequentially enters the heat exchange pipes of the heat exchange box body for heat exchange, then enters the hot air chamber and is discharged from the hot air outlet. Heat generated by fuel combustion can be fully utilized, heat dissipation loss and smoke exhaust heat loss are effectively reduced, the heat conversion rate is remarkably improved, and the hot blast stove can be widely applied to the field of tea leaf fixation hot blast stoves.

The application discloses an infrared microscopic imaging heating device, which comprises a base, a column heating platform standing on the base, at least one side of the column heating platform being provided with a heating sheet, the column heating platform being provided with a heating plate matched with the heating sheet, the column heating platform being provided with a boss-shaped heating platform, the heating platform being fixed to the upper end of the heating platform and the heating plate, and the upper surface of the heating platform being used for placing a chip to be heated. The application provides a new heating device for the field of infrared microscopic detection, so that an infrared camera can not be affected by the heating platform, and the heating demand in the field of infrared microscopic detection is met.

The utility model discloses a caking property detection device for coking coal, which relates to the technical field of coking coal detection and comprises a weighing device, a detection box is fixedly connected to the central position of the upper side of the weighing device, and a stirring motor is fixedly mounted at the central position of the upper side of the detection box. The output end of the stirring motor penetrates through the upper side plate of the detection box and is fixedly connected with a telescopic rod, the lower end of the telescopic rod and the upper part of the sample tube are fixedly connected with a rotating joint, and the upper side of the detection box and the left and right ends of the stirring motor are slidably connected with pull rods. By arranging the stirring motor, the telescopic rod, the stirring blade, the rotating joint, the connecting plate, the reset spring, the fixing plate and the pull rod, coking coal can be effectively stirred, the coking coal at the bottom of the sample pipe is stirred to the upper layer, an experimenter can effectively record accurate experimental data, large deviation of the experimental data is avoided, and the experimental efficiency is improved. And the evaluation result of the coking coal is more accurate.