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250results about How to "Many connections" patented technology

Three-dimensional composite friction pendulum vibration isolator based on nonlinear energy trap

The invention discloses a three-dimensional composite friction pendulum vibration isolator based on a nonlinear energy trap. Structural vibration frequency is staggered away from seismic oscillation dominant frequency and a large amount of seismic oscillation input energy is absorbed by using the characteristics of attenuation and absorption of vibration energy, absorption of vibration frequency bandwidth and the like existing in the nonlinear energy trap as well as a vertical vibration isolation disk-shaped spring, so that the multi-dimensional seismic response of a structure is reduced, and seismic hazards of building structures are prevented. The three-dimensional composite friction pendulum vibration isolator comprises a metal sliding sleeve, a disk-shaped spring, a polytetrafluoroethylene sliding joint, a nonlinear energy trap and pile caps, wherein the disk-shaped spring is arranged in the metal sliding sleeve; the polytetrafluoroethylene sliding joint is arranged on the disk-shaped spring; the polytetrafluoroethylene sliding joint is in relative sliding contact with an upper pile cap through a polytetrafluoroethylene coating; the side face of the nonlinear energy trap is connected with the disk-shaped spring through a rigid spring; the nonlinear energy trap is in rolling contact with a lower pile cap through a rolling shaft; sliding surfaces of the upper and lower pile caps are spherical surfaces. The three-dimensional composite friction pendulum vibration isolator is used for resisting possible violent earthquakes.
Owner:NORTHEAST FORESTRY UNIVERSITY +1

Multi-split air conditioning system

The invention relates to a multi-split air conditioning system. A compressor, an outdoor heat exchanger and an indoor heat exchanger form a connection loop through two four-way valves, electronic expansion valves, electromagnetic valves, wherein a terminal a of a first four-way valve is connected with the refrigerant outlet of the compressor; the terminal d of the first four-way valve is connected with the terminal w of a second four-way valve by virtue of a check valve; the terminal c of the first four-way valve is connected with the terminal y of the second four-way valve in parallel and then is connected with the refrigerant inlet of the compressor by virtue of a gas-liquid separator; the terminal w of the second four-way valve is connected with the refrigerant outlet of the compressor through a first electromagnetic valve; the terminal x of the second four-way valve is sequentially connected with the outdoor heat exchanger, a high pressure liquid storage tank, a second electromagnetic valve, a second electronic expansion valve, an indoor unit electronic expansion valve and the terminal s1 of the indoor heat exchanger; and the terminal s2 of the indoor heat exchanger is connected with the terminal b of the first four-way valve. The multi-split air conditioning system disclosed by the invention is mainly applied to a heat pump air conditioning hot water system and has an ice storage function. The multi-split air conditioning system disclosed by the invention can save more energy, and has high working efficiency and wider practical range.
Owner:GD MIDEA HEATING & VENTILATING EQUIP CO LTD

Home security system

The invention discloses a novel home security system. The novel home security system comprises a host, a remote controller, a remote terminal and a sensing device provided with a radio transmitter-receiver set; the host is provided with a radio transmitting-receiving module, and the host is in radio connection with the sensing device, and therefore, control and information transmission can be realized through receiving and transmitting radio signals; the host is provided with a system state triggering control module, so that system working states can be selected according to conditions detected by system devices and the sensing device; and the sensing device is provided with a backup power supply. With the novel home security system of the invention adopted, the system working states can be reasonably controlled, and power consumption can be reduced, and standby time can be increased, and storage space can be saved; the sensing device and the host can be connected with each other through radios, and therefore, network connections can be diversified, and high security and firmness can be realized; the sensing device is ganged, so that a better early warning effect can be realized; and control terminal operation authority is clear, and a user identification function is realized, and therefore, false warning can be decreased, and management can be facilitated.
Owner:李观彧
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