Near suction type extractor hood

Abstract

The invention discloses a near suction type extractor hood. The near suction type extractor hood comprises a shell, a machine case located above the shell, and a draught fan system. An air inlet is formed in the front side of the shell. The near suction type extractor hood is characterized in that the draught fan system is a ternary draught fan, the ternary draught fan is vertically arranged in the machine case, and a noise lowering module for lowering noise generated by the ternary draught fan is arranged in the shell. Through adoption of the ternary draught fan, the draught fan structure iscompact, the size is relatively small, the draught fan efficiency and the wind pressure are high, the generated negative pressure gradient is high, and the fume suction efficiency can be greatly improved. The ternary draught fan is vertically arranged in the machine case, straight suction and straight discharging are achieved, the negative pressure area is centralized, the pipeline resistance canbe better reduced, fume discharging is smoother, and a noise source is farer away from a user; and through the arrangement of the noise lowering module, high-frequency, medium-frequency and low-frequency full-band noise can be absorbed, and influences on normal usage of the extractor hood are avoided.

Description

technical field [0001] The invention relates to kitchen appliances, in particular to a near-suction range hood. Background technique [0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Generally, range hoods include top-suction and near-suction range hoods. Near-suction range hoods use vortex wind pressure to move away, and absorb most of the fumes that are close to the stove in an arc, which can reduce adverse effects on human health. Influence, and the power source is closer to the stove, basically it will not reduce the suction effect of the power source. [0003] For example, a range hood disclosed in a Chinese patent with application number 201710090915.X includes a casing, a partition and a fan assembly. The partition is arranged inside the casing and divides the inside of the casing into a front chamber and a The rear chamber is provided with a main air inlet on the partition, the fan assembly is supported on the partitio...

AI Technical Summary

Problems solved by technology

[0004] The solutions in the prior art mentioned above usually use multi-blade centrifugal fans, and the multi-blade centrifugal fans are placed in the lower triangle. In order to ensure higher air intake efficiency, the volume of the fan system will be relatively large, and the fan system will This arrangement, because the impeller has a pre-rotation effect on the gas and the direction of the gas will gradually change during the 90° turning process of the gas flowing into the impeller, the simple consistent inlet and outlet angles are not good for the actual working ability of the impeller; in addition, The fan is far away from the air outlet pipe, it is difficult to overcome the resistance of the pipe, the fan faces the user directly, lacks noise reduction measures, and the noise is high

Images