11results about How to "Cancel sound" patented technology

The utility model provides a novel fireproof door, and belongs to the technical field of municipal engineering. The novel fireproof door comprises a fireproof door frame, fireproof hinges, a door body, a first mouth-shaped galvanized steel sheet, a second mouth-shaped galvanized steel sheet, a third mouth-shaped galvanized steel sheet, a connecting plate, a fourth mouth-shaped galvanized steel sheet, a fifth mouth-shaped galvanized steel sheet, a sixth mouth-shaped galvanized steel sheet and fireproof glass. According to the novel fireproof door, the fireproof glass is reinforced and fixed through the first square galvanized steel plate, the second square galvanized steel plate, the third square galvanized steel plate, the fourth square galvanized steel plate, the fifth square galvanized steel plate and the sixth square galvanized steel plate, the fireproof performance of the first square galvanized steel plate, the second square galvanized steel plate, the third square galvanized steel plate, the fourth square galvanized steel plate, the fifth square galvanized steel plate and the sixth square galvanized steel plate is high, and the fireproof glass is effectively prevented from falling off from the galvanized steel ladle plate; the safety protection performance of the door body is improved, the fireproof effect is high, the accident probability is reduced, and better use experience is brought to a user.

The present invention provides a sound-absorbing and anti-blocking aluminum alloy door and window slide rail, which relates to the technical field of slide rails and includes: a moving part, which is an L-shaped plate structure, and there are two moving parts in total, which are respectively installed on both sides of the inside of the main body, and each moving part is provided with evenly arranged top parts on the top, which are arc-shaped plate structures and are made of sound-absorbing cotton. When the device is in use, the doors and windows can contact the top parts made of sound-absorbing cotton during the movement, so that the sound-absorbing cotton can eliminate the sound generated during the movement, and avoid the noise generated when the doors and windows move. Since the top parts are arc-shaped structures, the top parts can be compressed after the doors and windows are installed, so that the top parts can control the moving speed of the doors and windows, and avoid the doors and windows moving too fast, thereby causing a large collision. The problem that the door and window slide rails are prone to noise during the movement of the doors and windows, and the moving speed of the doors and windows cannot be controlled while reducing the noise, is solved.

The present invention relates to a multifunctional protective valve, comprising a valve body, a valve disc and a valve cover; the valve disc is characterized in that: a water hammer absorbing device and a forced closing device are arranged on the back of the valve disc; the positive medium pressure pushes the valve disc to open; when the medium is in the reverse direction, the valve disc is automatically closed by the gravity and back pressure of the valve disc, and at the same time, the negative pressure suction force generated by the water hammer absorbing device on the valve disc causes the valve disc to close slowly, avoiding the collision between the valve disc and the valve seat, eliminating the sound and absorbing the water hammer; when closing in an emergency, the pressure reducing valve of the forced closing device is opened to introduce the medium pressure of the valve body inlet into the upper piston chamber connected with the valve disc, and the valve disc is forced to close. The dual functions of a check valve and a stop valve are realized, and the valve disc has the advantages of simple structure, low manufacturing cost, good effect of eliminating sound and absorbing water hammer, reliable closing and sealing performance, etc.

The present application relates to a kind of electromagnetic underwater acoustic transducers, including shell, it is arranged in liquid-filled pipeline;Displacement amplifier module is arranged in shell, displacement amplifier module includes drive panel, oil cylinder and radiation panel, radiation panel is retractably arranged below oil cylinder, radiation panel side and liquid in liquid-filled pipeline contact, drive panel is retractably arranged above oil cylinder;Water pressure balancer module is arranged above drive panel;Electromagnetic actuator module is arranged in shell and is outside water pressure balancer module.The present application passes through water pressure balancer module and transmits the hydraulic pressure outside shell to drive panel, so that the drive panel and radiation panel on both sides of oil cylinder keep hydraulic balance, in through electromagnetic actuator module drive keep hydraulic balance after the drive panel and radiation panel movement, make radiation panel emit amplitude opposite, phase same acoustic wave to offset noise, so that transducer can eliminate sound in the pipeline of greater pressure.

The utility model discloses an embedded air conditioner indoor unit and an air conditioner. The embedded air conditioner indoor unit comprises a main body, a first air duct and a second air duct are arranged in the main body; the heat exchanger is arranged in the first air duct; a first air opening of the fan assembly is communicated with the first air duct, a second air opening of the fan assembly is communicated with the second air duct, and the fan assembly is arranged to form an air beam flowing from the second air duct to the first air duct through the fan assembly; the first air opening is provided with a noise improvement structure, and the noise improvement structure is arranged to prevent air beams from blowing to a fin noise generation area formed on the heat exchanger in the operation process of the fan assembly so as to improve the noise generated when the air beams blow fins in the fin noise generation area in the operation process of the fan assembly. According to the scheme, noise generated in the operation process of the embedded air conditioner indoor unit is smaller.

This application provides an echo cancellation system, method, and device based on a complete reference signal on the server side, applicable to the field of audio processing technology. The system of this application uses the original audio sample from the client, stored on the server side, as a precise reference signal. When returning the output audio signal to the client, the server has already subtracted the client's corresponding reference signal from the globally mixed audio, thereby eliminating the client's voice and preventing the client user from hearing their own voice, thus achieving echo cancellation. Compared to existing technologies where echo cancellation is achieved by the client estimating the echo using AEC technology, the system of this application leverages the server's possession of a complete reference signal to achieve echo cancellation, reducing complexity while ensuring the accuracy of echo cancellation.

The utility model discloses a kind of conveniently dismounting mute tow chain, including several chain links connected head and tail, chain link includes two parallelly arranged vertical plate one and vertical plate two, one end of vertical plate one and vertical plate two is equipped with connecting hole, the other end is equipped with the connecting column compatible with connecting hole, connecting hole is equipped with elastic mute piece, vertical plate one avoids the upper and lower ends of connecting hole and connecting column and is fixed with horizontal plate one, vertical plate two avoids the upper and lower ends of connecting hole and connecting column and is fixedly connected with horizontal plate two, the end of each horizontal plate one away from vertical plate one is equipped with first sliding slot, horizontal plate two is correspondingly embedded in first sliding slot to make horizontal plate one and horizontal plate two slidingly connected, the end of each horizontal plate one away from vertical plate one is equipped with locking assembly. The technical scheme of the utility model can realize the quick dismounting and installation of mute tow chain, so as to facilitate the user to assemble suitable length of tow chain according to needs, facilitate maintenance and replacement.

The present invention relates to a green epidemic prevention U-shaped ultra-quiet air ecological device, comprising a shell, wherein a high-speed airflow conversion U-shaped air purification zone is provided inside the shell, so that condensed water is not easily carried away with the air, and an air inlet for allowing air to flow into the U-shaped air purification zone and an epidemic prevention air outlet for allowing purified air to be discharged to the outside of the shell are provided on the shell, and a purification filter component is arranged in the U-shaped air purification zone, and the purification filter component is used to purify impurities and bacteria contained in the air; the present invention selects to enable a high-efficiency filter when an epidemic occurs, and closes the high-efficiency filter under normal circumstances, and has strong practicality. The air passes through the high-speed airflow conversion U-shaped air purification zone from the air inlet to the epidemic prevention air outlet, and passes through the primary and secondary efficiency filter components, the heat exchange component, the high-efficiency filter component and the sterilization component for vertical and horizontal airflow diversion, so that the air-water separation improves the heat exchange efficiency and flow rate, the filtration purification, and the high-efficiency sterilization, especially the aerosols in the air.

The utility model discloses a novel steam seal cooler drainage system which comprises a steam seal cooler arranged between a steam turbine and a low-level water tank, a steam pipeline and a drainage pipeline are arranged between the steam seal cooler and the low-level water tank, the steam pipeline is arranged on one side close to the steam seal cooler, and the drainage pipeline is arranged on the other side close to the steam seal cooler. A drainage bypass pipeline is connected to the upper portion of the drainage pipeline, a U-shaped pipeline is connected to the upper portion of the drainage bypass pipeline, a non-pressure drainage opening is formed in the lower portion of the steam seal cooler, and the U-shaped pipeline is lower than the non-pressure drainage opening. After the technical scheme is adopted, according to the drainage system of the steam seal cooler, the U-shaped pipeline is additionally arranged on the drainage pipeline, so that a steam-water mixed medium is subjected to temperature reduction, pressure reduction and steam-water separation in the steam pipeline, the drainage temperature is ensured, and sound generated by the steam-water mixed medium contained in drainage is eliminated.

The utility model discloses an engine exhaust manifold assembly, which relates to the field of exhaust manifold technical equipment, and comprises an outlet flange, a catalyst is arranged at one end of the outlet flange, an exhaust manifold header pipe is arranged at one end of the catalyst, a first manifold section is arranged at one end of the exhaust manifold header pipe, and a second manifold section is arranged at one end of the first manifold section. A plurality of first manifold branch pipes are arranged on one side of the first manifold section, a first noise reduction mechanism is arranged at one end of each first manifold branch pipe, a first inlet flange assembly is jointly arranged at one end of each first noise reduction mechanism, a plurality of second manifold branch pipes are arranged on one side of the second manifold section, and a second noise reduction mechanism is arranged at one end of each second manifold branch pipe. And one ends of the second noise reduction mechanisms are jointly provided with a second inlet flange assembly. The exhaust manifold assembly is scientific and novel in structure, efficient noise reduction of the exhaust manifold assembly can be achieved, and noise generated when an engine exhausts is effectively reduced.

The utility model relates to the technical field of structure application in the machinery industry, in particular to a flexible wiring structure for electrical products. The junction box comprises a junction box body, the junction box body is composed of a bottom shell and a panel framework which are buckled with each other, a wiring terminal is arranged in the junction box body, and the wiring terminal comprises a cage type wiring cavity and a wire pressing screw penetrating through the upper end of the cage type wiring cavity. A positioning groove for accommodating the cage type wiring cavity and a limiting groove for preventing the wire pressing screw from sliding out and shaking are formed in the panel framework, and a pressing cavity corresponding to the positioning groove and a flexible filling structure corresponding to the limiting groove are arranged on the bottom shell. The structure of the utility model eliminates the sound generated by the cage type wiring terminal and the wire pressing screw when a product shakes, and can prevent the wire pressing screw from being possibly separated from the cage type terminal due to rotation generated by long-time transportation vibration. The flexible wiring structure product provided by the utility model is more in line with the humanized design requirements of modern electronic products, and ensures that the electrical and pneumatic products are simpler and more reliable in the transportation process.