Cooling and extinguishing smoke exhaust ventilator based on R744 refrigerant

Abstract

The invention discloses a cooling and extinguishing smoke exhaust ventilator based on an R744 refrigerant. The cooling and extinguishing smoke exhaust ventilator comprises a posture adjusting mechanism, a shell body, an electric control throttling valve, a condenser, a compressor, a corrugated pipe, a pipe network, a spraying nozzle, a first fan and a second fan. The posture adjusting mechanism has six freedom degrees and can monitor thermal imaging conditions of a hearth. The shell body is of a multi-layer hemispherical structure and is internally provided with the pipe network, the first fan, a lower motor, an upper motor and the second fan. The R744 refrigerant medium with which the pipe network is filled is used for cooling high-temperature cooking fume and extinguishing a fire sourceof the hearth. The lower motor drives the first fan to rotate, and the upper motor drives the second fan to rotate. The corrugated pipe has a telescopic effect and can make the interior of the shell body communicate with a flue in a building body. The compressor is used for compressing R744 refrigerant gas. The condenser is used for lowering the temperature of the R744 refrigerant gas so as to convert the R744 refrigerant gas from a high-pressure gas state to a high-pressure liquid state. The electric control throttling valve is used for adjusting and controlling the speed of the high-pressureliquid state R744 refrigerant flowing into the pipe network.

Description

technical field [0001] The invention relates to the technical field of range hoods, in particular to a temperature-lowering and fire-extinguishing range hood based on R744 refrigerant. Background technique [0002] Cooking fume is formed by a series of physical and chemical changes in cooking oil and food under high temperature conditions. When the cooking oil is heated to 170°C, a small amount of oil fume begins to appear. As the temperature rises, the decomposition speed of the oil accelerates. When the temperature reaches 250 ℃ will produce a lot of cooking fumes. In our country's diet, most foods need to be fried, fried, boiled, fried and other processing processes at high temperatures, and even the phenomenon of "overturning the pan" will appear during the cooking process. The oil temperature is often above 250 ° C, which is extremely It is easy to produce a lot of cooking fumes. [0003] Due to the limitation of the structural design of the building itself, the oily ...

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Problems solved by technology

[0005] The Chinese invention patent with the application number CN201510840587.1 discloses a range hood with a fire extinguishing device. By installing a spray device on the hood, it can automatically spray when a fire occurs around the hood and itself to achieve the effect of fire extinguishing. That is, water mist is only sprayed when there is an open flame to achieve the effect of fire extinguishing. Its technical purpose is not to reduce the temperature of the oil fume. The machine is fixedly installed on the wall, and its spray head can only spray water mist in a fixed direction, and the spray direction cannot be adjusted according to the position of the fire source, so the fire extinguishing effect is not ideal; the application number is CN00209613. A fire extinguishing device for a range hood, the fire extinguishing device is provided with a fixed nozzle and a hand-held hose, which can effectively extinguish the fire at the ignition point below the range hood, but also cannot reduce the temperature of the oil fume during cooking, nor prevent the flue occurrence of fire

[0006] Once the flue catches fire, thick smoke will billow, and the fire will not only spread rapidly to the entire building, threatening the safety of life and property, but also easily cause panic in the surrounding areas and affect the normal order and stability of the society. A range hood that reduces the temperature of the oil fume, and can automatically detect the fire position of the stove, and spray carbon dioxide fire extinguishing agent on the source of the fire to extinguish the fire

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