3results about How to "Drive fast" patented technology

This utility model discloses a tunnel fire-fighting foam liquid filling system, belonging to the field of fire-fighting equipment technology. It includes several fire boxes, a foam liquid filling vehicle, and a monitoring center. Both the fire boxes and the foam liquid filling vehicle are networked with the monitoring center to achieve data exchange. Specifically, each fire box contains a foam liquid storage tank and a first control device. The foam liquid storage tank is equipped with a first liquid level sensor, a solenoid valve, a variable frequency delivery pump, and a first flow meter. A flow regulating valve and a second flow meter are installed on the pressure water pipe. All components are connected to the first control device. The foam liquid filling vehicle contains a foam liquid storage tank, a variable frequency high-pressure pump, a battery, a third flow meter, and a second control device. Both the first and second control devices are connected to the monitoring center. This utility model provides a highly efficient, intelligent, and easy-to-maintain tunnel fire-fighting foam liquid filling system.

The utility model belongs to compressor technical field, specifically discloses a kind of frequency converter drive circuit, frequency converter and compressor.The high voltage side / low voltage side drive and discharge circuit in frequency converter drive circuit, it is improved as follows on the basis of original circuit structure: first, a capacitor and resistance are newly added in the gate end of MOS tube, and newly added capacitor and resistance are arranged in parallel;Second, the resistance value of voltage division resistor in original high voltage side / low voltage side drive and discharge circuit is reduced, to obtain new voltage division resistor, the resistance value of new voltage division resistor is significantly reduced compared with the resistance value of original voltage division resistor, and the sum of the resistance value of new voltage division resistor and newly added resistance is equal to the resistance value of original voltage division resistor.When MOS tube is turned on, capacitor is equivalent to short circuit, voltage is charged to MOS tube through new voltage division resistor and capacitor first, to accelerate the turn-on speed of MOS tube, reduce the risk of damaging MOS, to ensure the stable and reliable conduction of MOS tube.

The optical path control member according to the embodiment includes a first substrate, a first electrode provided on the first substrate, a second substrate provided on the first substrate, a second electrode provided below the second substrate, and an optical conversion unit provided between the first electrode and the second electrode, in which: the optical conversion unit includes a partition wall portion, a housing portion, and a base portion; an optical conversion material including a dispersion liquid, an optical conversion particle, and a dispersant is provided in the housing portion; and the dispersant includes a non-ionic dispersant.