77results about How to "Not easy to turn off" patented technology

The invention discloses an ophthalmic therapy device. The ophthalmic therapy device comprises a periscope shell, wherein a plurality of convection holes are formed in the shell; an eyelet cushion is arranged on the open end at the reverse side of the shell, and porous lenses communicated with the inner part of the shell are arranged on left and right parts of the eyelet cushion; a nose bridge cushion is arranged between left and right porous lenses, left and right smoke discharging columns are arranged at the upper end of the shell, smoke discharging holes are formed in the tops of the left and right smoke discharging columns, smoke discharging caps are sleeved on the left and right smoke discharging columns, left and right ash outlets are formed at the lower end of the shell, ash receiving slots are formed in the shell, and moxibustion cone fixing tables for placing moxibustion cones are erected in the left and right ash receiving slots. The ophthalmic therapy device has a certain effect to relief and treat ophthalmic diseases such as amblyopia, shortsightedness, hyperopia and strabismus in young children and senior cataracts.

The invention discloses an inner ring fire cover and a cooker including the same. The inner ring fire cover comprises: a fire cover body, which has an inner cavity inside the fire cover body; a main fire hole, and the main fire hole ring is arranged on the fire cover body; Small flame hole, the small hole for stabilizing the flame is set above the main fire hole, and the inside of the small hole for stabilizing the flame communicates with the inner cavity, and the outside of the small hole for stabilizing the flame leads to the outer wall of the fire cover body; anti-blocking brim, anti-blocking brim It is arranged on the top of the fire cover body and protrudes outward from the outer wall of the fire cover body; the upper flame stabilization groove is a groove formed under the brim of the anti-blocking hat, and the upper flame stabilization groove is located in the small flame stabilization hole The top of the lower flame stabilizing groove, the lower flame stabilizing groove is an annular groove arranged below the main fire hole, and the lower flame stabilizing groove is tangent to and connected with the main fire hole. The invention has a double flame-stabilizing structure, which ensures the temperature combustion of the flame, improves the fire-preserving performance at the main fire-preserving hole, and is not easy to extinguish the flame; increases the gas concentration at the ignition pin, and improves the success rate of ignition.

The invention discloses a solid-liquid scramjet engine, and belongs to the technical field of engines. The engine comprises an air inlet channel, a combustion chamber, a tail spray pipe, a fuel gas generator, an oil tank system, a control system and the like. The oil tank system comprises a high-pressure gas cylinder, a pressure reducing valve, a safety valve, fuel oil, an oil filter, a leather bag and the like, and the control system provides fuel oil flow meeting requirements for the scramjet engine according to set requirements. The fuel gas generator is mainly composed of a heat insulation combustion chamber, a wrapped grain, a long tail pipe spray pipe component and an igniter. The fuel gas generator is fixedly arranged in the oil tank system, and a long tail pipe of the fuel gas generator penetrates through the head portion of the combustion chamber and stretches into the combustion chamber. The solid-liquid scramjet engine can keep the advantages that the specific impulse of the liquid fuel scramjet engine is high, and the solid fuel scramjet engine is not prone to being shut down under a large attack angle, and meanwhile the defects that the liquid scramjet engine is prone to being shut down under the large attack angle, the thrust of the solid fuel scramjet engine is hard to adjust, and the specific impulse is low are overcome.

The invention provides a frequency locking method of plasma power. The frequency locking method includes the following steps: (A1) detecting peak voltage or peak current of a plasma coil, (A2) adjusting frequency of a signal source according to the peak voltage or the peak current, and (A3) outputting adjusted radio frequency power through fixed matching. The frequency locking method of the plasma power has the advantages of being high in efficiency, very little in outward radiation, good in work stability, high in reliability, capable of continuously adjusting the output frequency and zero reflection power and the like.