5results about How to "Control connectivity" patented technology

The invention provides a fuel cell hydrogen supply system and a hydrogen supply method. The fuel cell hydrogen supply system comprises a liquid hydrogen storage tank, a first gas path connected between the liquid hydrogen storage tank and a fuel cell, a second gas path connected in parallel with the first gas path, and a control assembly, a gasification device is arranged on the first gas path, and a gas storage bottle is arranged on the second gas path; the control assembly comprises a controller and a plurality of control valves; the controller controls the plurality of control valves and can respectively control the connection or disconnection of the first gas path and the second gas path, so that the liquid hydrogen in the liquid hydrogen storage tank is conveyed to the fuel cell through the first gas path, and when the pressure of the gaseous hydrogen in the liquid hydrogen storage tank exceeds a first preset pressure threshold value, the gaseous hydrogen is stored in the gas storage bottle through the second gas path; and hydrogen can be supplied to the fuel cell through the second gas path. According to the fuel cell hydrogen supply system, gaseous hydrogen exceeding the first preset pressure threshold in the liquid hydrogen storage tank can be recycled, so that the release of the gaseous hydrogen to the outside is reduced, and the waste of resources is reduced.

The utility model discloses a pet feeding machine and relates to the technical field of automatic animal feeding, the pet feeding machine comprises a shell and a discharging assembly, a grain storage bin, a discharging channel and a mounting cavity are arranged in the shell, one end of the discharging channel communicates with the bottom wall of the grain storage bin, and the other end of the discharging channel communicates with the exterior of the shell; the mounting cavity is communicated with the discharging channel; the discharging assembly is arranged in the mounting cavity and comprises a rotating disc and a driving mechanism, and part of the rotating disc is used for blocking the discharging channel; at least one discharge hole is formed in the turntable; and the driving mechanism is used for driving the turntable to rotate to a preset angle, so that the discharge hole rotates to at least partially communicate with the discharge channel. According to the technical scheme, the pet food is stored in the food storage bin in the shell, the driving mechanism is used for driving the rotating disc to rotate to the preset angle, the discharging holes in the rotating disc are at least partially communicated with the discharging channel, it is ensured that the pet food is smoothly output from the food storage bin through the discharging channel, and accumulation or blockage is avoided.

The invention relates to the technical field of magnesium powder processing, and provides a conveying device for magnesium powder processing, which is used for being mounted on a crushing cylinder, a crushing shaft is rotatably arranged in the crushing cylinder, the conveying device comprises an end cover, the end cover is arranged at one end of the crushing cylinder, one end of the crushing shaft penetrates through the end cover, and the end cover is provided with a discharge port; the first screen is arranged at the discharge hole; the temporary storage bin is arranged at one end of the smashing cylinder and located below the end cover. The baffle plate is arranged in the crushing cylinder in a relatively sliding manner; and after the baffle plate slides, the crushing cylinder is communicated with the temporary storage bin or is not communicated with the temporary storage bin. By means of the technical scheme, the problem that in the prior art, magnesium ingots are inconvenient to discharge according to needs after being smashed is solved.

The electronic atomizer comprises a shell, a mounting cylinder, an oil bottle, an elastic plug, a matching cylinder and an oil injection control assembly, wherein an oil cavity is formed in the shell; the mounting cylinder penetrates through the shell and communicates with the oil cavity; the oil bottle sleeves one end of the mounting cylinder; a slit is cut in the elastic plug; the oil injection control assembly penetrates through the shell and the matching cylinder, can move in the axial direction of the mounting cylinder and is provided with a first position and a second position, the oil injection control assembly is located on the side, close to the oil cavity, of the elastic plug at the first position, the slit is closed, and the oil injection control assembly abuts against the elastic plug and forces the slit to be opened at the second position; the oil bottle is communicated with the oil cavity. The electronic atomizer is convenient and controllable in oil injection.

The utility model relates to a cold water machine circulation testing arrangement, including first water tank, second water tank and third water tank, the top fixed mounting of first water tank has water pump, and the top of first water tank's front end face is provided with temperature sensor, and the rear end of first water tank is fixedly installed in second water tank, and the front end face of second water tank has the gap with the rear end face of first water tank, and the top of second water tank's rear end face is provided with temperature sensor, and the right side of first water tank is fixedly installed in third water tank, and the right end face of second water tank and first water tank has the gap with the left end face of third water tank, and the top of third water tank is fixedly installed with heater, and the top of third water tank's front end face is provided with temperature sensor, can high -efficient and accurate control the temperature of cooling medium through the setting of heater and temperature sensor, has improved the convenience and security of operation.