40results about How to "Reduce frostbite" patented technology

The invention relates to a quick freezing device, in particular to a tunnel-type liquid nitrogenquick freezing machine, and solves the technical problems of serious liquid nitrogen leakage and high liquid nitrogen consumption of an existing liquid nitrogen quick freezing machine. The tunnel-type liquid nitrogen quick freezing machine comprises a tunnel-type freezing chamber and a surrounding-type conveying mesh belt in the freezing chamber, wherein liquid nitrogen plugging devices are arranged at the feeding end and discharging end of the freezing chamber respectively; each liquid nitrogen plugging device comprises an air box arranged at the top of the conveying mesh belt; an air inlet channel is formed in the top of the air box; an air blowing hole is formed in the bottom of the air box; the air box is hermetically fixed with a top plate and two side walls of the freezing chamber; an air inlet communicated with the air inlet channel of the air box is formed in the top plate of the freezing chamber; a fan is arranged on the air inlet; the width of the air blowing hole is the same as that of the freezing chamber; a material conveying hole is formed between the air blowing hole and the conveying mesh belt. Due to the adoption of the liquid nitrogen quick freezing machine, the liquid nitrogen consumption can be reduced by 40-50% and the quick freezing cost is greatly reduced in comparison with a liquid nitrogen quick freezing machine without the plugging devices.

The present invention proposes a buoyancy valve, which includes a valve body; a valve chamber and a buoyancy chamber are arranged in the valve body; a valve core is arranged in the valve chamber, a float is arranged in the buoyancy chamber, and the float and the valve The mandrel of the core is connected; the valve body is provided with a first port, a second port, a third port and a fourth port; the first port and the second port communicate with the valve chamber, so The third port and the fourth port communicate with the buoyancy chamber; the float has an initial state and a floating state, and when the float is in the initial state, the buoyancy valve connects the first port and the second port disconnected, when the buoy is in the floating state, the buoyancy valve communicates the first port with the second port. The buoyancy valve can be used to easily identify when the emptying operation is completed, thereby effectively ensuring the emptying effect, which is beneficial to improving the service life and user experience of the water washing system. In addition, the present invention also proposes a water washing system and construction machinery with the buoyancy valve.

The invention discloses a liquid gasifying device and a gasifying method thereof and belongs to the field of energy chemical industry. The liquid gasifying device comprises a shell, multiple heat medium nozzles and a heat medium distribution pipe net. The shell is provided with an inner cavity. The inner cavity is used for containing a steel bottle and a heat medium enabling liquid contained in the steel bottle to be gasified. The shell is provided with a shell opening used for placing and taking out the steel bottle. The multiple heat medium nozzles are arranged on the shell and used for injecting the heat medium into the inner cavity of the shell. The heat medium distribution pipe net communicates with the multiple heat medium nozzles and are used for transferring the heat medium to the multiple heat medium nozzles and controlling the injection amount and the injection speed of the multiple heat medium nozzles. The liquid gasifying device and the gasifying method thereof have the beneficial effects of being capable of improving use efficiency of the heat medium and gasifying efficiency of liquid, being capable of reducing frost damage to a pipeline and equipment from liquid, and thus prolonging the service life of the equipment. The liquid gasifying device and the gasifying method thereof improve responsiveness and precision of liquid to temperature in the gasifying process.