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49results about How to "good efficiency" patented technology

Bridgeless boost converter with PFC circuit

InactiveCN101151791Amore efficientgood efficiency
A boost type power supply circuit for providing a DC output voltage comprising first and second semiconductor switches coupled between respective input lines and a common connection; an AC input voltage from an AC source being supplied across the input lines; first and second diodes coupled in series with respective ones of the switches; third and fourth diodes coupled across respective ones of the switches in a free-wheeling relationship with the switches; an inductance coupled in at least one of the input lines; a controller for controlling the conduction times of the switches by providing a pulse width control signal to each of the switches; wherein the controller turns on at least one of the switches during a positive half cycle of the AC voltage to allow energy storage in the inductance and turns off the at least one switch to allow the energy stored in the inductance to be supplied to an attached load through one of the first and second diodes and one of the third or fourth diodes; and the controller turns on at least one of the switches during a negative half cycle of the AC voltage to allow energy storage in the inductance and turns off at least one switch to allow the energy stored in the inductance to be supplied to the attached load through one of the first and second diodes and one of the third and fourth diodes. The controller determines an on-time and an off-time of a pulse of the pulse width modulated control signal during each half cycle of the AC voltage, the on-time and off-time of the pulse being controlled to regulate said output voltage and to provide power factor correction of said AC input voltage, based on either voltage sensing or current sensing.
Owner:INTERNATIONAL RECTIFIER COEP

Antivirus filter

The invention provides an antivirus filter. The antivirus filter comprises an outer structure located at an air outlet and further comprises a support frame and a multilayer filter material structure. The support frame is in seal connection with the outer structure through a seal structure. The multilayer filter material structure is arranged in the support frame in parallel. The multilayer filter material structure comprises a first filter layer and a second filter layer. The support frame comprises an air inlet support. At least one set of multilayer filter material support sheets are arranged in the air inlet support and are perpendicular to the inner surface of the air inlet support. The antivirus filter has the effects of better efficiency and better gas permeability in the aspect of filtering of viruses. The antivirus filter can reach the penetration rate lower than one thousandth for viruses, and the purpose of protection of human health is met effectively. If the technical standards of the two layers of filter materials are improved to 5% and 1% correspondingly, the penetration rate which cannot be detected can be achieved, and the antivirus filter can be used for very strict protective occasions. Due to the fact that the windage resistance of the combined filter materials of the technology belongs to the low windage resistance range, after combination, the windage resistance is still lower than that of filter materials of which one single layer is used and has a very high filtering effect on particulate matter.
Owner:SUZHOU BEIAN ELECTRONICS SCI & TECH CO LTD

Automatic wedding candy packaging machine

InactiveCN106081190Agood efficiencyreduce volume
The invention discloses an automatic wedding candy packaging machine. The manual wedding candy packaging mode consumes a large amount of time and labor. Pushers and candy storage boxes form a sliding pair, and the pushers and the top ends of connection rods form a rotating pair. The bottom ends of the connection rods and discs form a rotating pair. A candy pushing drive motor drives each disc. Every two synchronous pulleys are arranged in a spaced mode and connected through a synchronous belt. Candy discharging pipes and optoelectronic switches are fixed to a peripheral support. The output end of each synchronous belt extends into a candy discharging notch formed in the side wall of the corresponding candy discharging pipe, and the corresponding optoelectronic switch is arranged at the output end of the synchronous belt. Each delivery drive motor drives one of the two corresponding synchronous pulleys. The candy discharging pipes of every two adjacent delivery counting mechanisms communicate vertically. The synchronous belt of each delivery counting mechanism is arranged at the output end of the candy storage box of the corresponding candy pushing mechanism. In the vertical direction, a push-in air cylinder and a push-out air cylinder are arranged between a candy collection plate and the bottom end of a candy box pipe. The automatic wedding candy packaging machine can achieve counting and packaging of candies of various shapes and sizes.
Owner:HANGZHOU DIANZI UNIV

Intelligent multifunctional tea table for home use

InactiveCN107594900AIncrease the usable areaGood efficiency
The invention discloses an intelligent multifunctional tea table for home use. The tea table comprises a tea seat and an under frame, wherein a secondary box is arranged on the tea seat and a primarybox is arranged on the under frame; a displacement mechanism is arranged on the under frame; an LCD touch screen, an electromagnetic heating coil and a telescopic groove are embedded in the surface ofthe primary box; a faucet base is arranged in the telescopic groove; a pressure sensor is connected to the faucet base; a piston rod is connected to the pressure sensor; a soft hose is connected to the faucet base; a water supply mechanism is connected to the soft hose; a bushing port is kept in the top of the water supply mechanism; a motor is arranged on the water supply mechanism; a rotating wheel is arranged on the motor; a transmission rod is meshed with the rotating wheel; a support frame is arranged on the transmission rod; a bucket is arranged on the support frame; and a funnel head is arranged in an inner pipe. Through the unique design of the tea seat and the base (the under frame) of the tea table, the service area of the tea table can be intelligently increased; daily water drinking is integrated into the tea table, so that the space of home decoration is saved; and by virtue of a central control module, real-time supply of cold water and hot water is achieved, and meanwhile, heating and intelligent control operations are offered.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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