4results about How to "High cost advantage" patented technology

The utility model relates to the technical field of cartons, and one embodiment of the utility model provides an easy-to-tear carton which comprises a carton board, folding lines are arranged on the carton board, a height adjusting assembly is arranged on the carton board, and an adhesion assembling assembly is arranged on the carton board; and the height adjusting assembly comprises an inserting cavity, the outer side wall of the folding line is provided with a breaking line, and the breaking line is formed by arranging a plurality of vertical through holes along a straight line. By means of the technical scheme, the problems that in the prior art, a conventional carton is fixed in height and difficult to flexibly meet the packaging requirements of objects with different heights, in practical application, merchants need to prepare cartons of various specifications, and the inventory management cost is increased are solved; when a consumer receives too large or too small cartons, the space cannot be effectively utilized, and resource waste is caused, for example, in the field of clothing e-commerce, clothes of different lengths need to be packaged by cartons of different heights, and if the height of the cartons cannot be adjusted, the problems that packaging is not attached, packaging materials are wasted and the like occur.

The invention belongs to the technical field of power electronic system control, and particularly relates to a bridge arm energy balance control method of a modular multi-level converter, which comprises the following steps: generating a direct current bus current reference value for representing the direct current side energy regulation requirement of the modular multi-level converter; in combination with the energy state of each bridge leg, generating a bridge leg current reference value corresponding to each bridge leg by using a bridge leg current reference value distribution strategy; generating mutually independent bridge leg common-mode voltage modulation signals of the bridge legs; based on a common-mode modulation signal energy rectification distribution strategy, performing energy rectification type distribution in the bridge legs, and generating common-mode voltage modulation signals corresponding to the upper bridge arm and the lower bridge arm; the differential mode voltage modulation signals are combined with differential mode voltage modulation signals generated by alternating current side control to generate bridge arm voltage modulation signals corresponding to the bridge arms; trigger pulses of all sub-modules in the bridge arm of the modular multilevel converter are generated through a modulation method, and controlled adjustment of the energy of the bridge arm is achieved.

The present invention relates to a water-saving and energy-saving hydrogen production system and method. A hydrogen separator and a hydrogen scrubber are sequentially connected to the hydrogen outlet of an electrolytic cell, and are respectively used for gas-liquid separation and cooling purification of hydrogen; the low-temperature passage of a hydrogen heat exchanger is connected to the hydrogen outlet of the hydrogen scrubber and the hydrogen inlet of a deoxygenation tower, and the high-temperature passage of the hydrogen heat exchanger is connected to the hydrogen outlet of the deoxygenation tower and the hydrogen inlet of a hydrogen cooler; the deoxygenation tower conducts a catalytic reaction on the oxygen mixed in hydrogen to generate water; the hydrogen cooler cools the deoxygenated hydrogen after heat exchange and realizes moisture condensation; a gas-water separator is connected to the hydrogen outlet of the hydrogen cooler to remove the liquid water in hydrogen; a drying tower is connected to the hydrogen outlet of the gas-water separator for drying hydrogen; an electrolyte heat exchange module is used for the electrolyte flowing out of the hydrogen separator to exchange heat with an external system and then flow back into the electrolytic cell. The present invention significantly reduces the energy consumption and water consumption of the hydrogen production system, improves the energy utilization rate and the adaptability in water-scarce areas, and improves the economy of green hydrogen.

The utility model discloses an electronic water pump integrated with a physical quantity sensing function, which relates to the technical field of electronic water pumps and parts thereof and comprises an electronic water pump body and a plurality of sensors. The electronic water pump body is provided with at least one overflowing position for a liquid medium to flow; the sensor is arranged at at least one overflowing position of the electronic water pump body so as to detect at least one physical quantity of the liquid medium and transmit the physical quantity to the upper computer. The utility model mainly solves the problem of how to integrate the sensor at the electronic water pump; the electronic water pump has the advantages of being compact in structure and convenient to install and use, integration of the electronic water pump and the sensor is achieved, the number of sensors installed at the positions of an automobile (especially a new energy automobile), a heat management system, household appliances, industrial equipment and the like is reduced, system arrangement is simplified, the probability of system failure / failure is reduced, and the service life of the system is prolonged. And the cost advantage is improved.