Range hood ventilation module and its assembling method

Abstract

A range hood ventilation module and assembly method thereof, the module comprising a primary tube (1), and an auxiliary tube (2) both made of integrally spun tubes; the auxiliary tube (2) is provided with an oil screen (22) in the front, and a connecting tube (21) in the back mated with the inner diameter of the primary tube (1); after an axial fan is installed in the primary tube (1), the primary tube is abutted with the auxiliary tube (2) to form the ventilation module. The assembly method of the ventilation module comprises: after installing a fixing bracket on the range hood ventilation module, the ventilation module is disposed in a smoke collection box (6) at the top of the range hood (5), and is connected to the smoke collection box (6) via the fixing bracket. The primary tube (1) and the auxiliary tube (2), being made by spinning a tube to form a cylinder, therefore have no seams or welded spots on the outer side. By installing an axial fan in the cylindrical range hood, oil smoke is directly discharged after passing through the fan. With an unobstructed ducts, the present invention improves fan efficiency, and reduces working noise and energy consumption.

Description

technical field [0001] The invention relates to a range hood, in particular to a range hood exhaust module and an assembly method thereof. Background technique [0002] At present, range hoods on the market (such as European-style range hoods) often require the size of the box to be small due to appearance requirements, resulting in a single form of the bellows system. Most of them are centrifugal fan systems placed in square boxes. There is a certain angle between the air inlet and the air inlet of the box body, and the angle is generally 90 degrees. Therefore, such a bellows system mainly has the following two defects: First, because there is a decorative cover installed on the outside of the box body, the hood installation The rear impeller cannot be disassembled and washed. After a long period of use, the impeller will accumulate a large amount of grease, which will cause the air performance of the impeller to decline, and will also damage the dynamic balance of the impe...

AI Technical Summary

Problems solved by technology

[0002] At present, range hoods on the market (such as European-style range hoods) often require the size of the box to be small due to appearance requirements, resulting in a single form of the bellows system. Most of them are centrifugal fan systems placed in square boxes. There is a certain angle between the air inlet and the air inlet of the box body, and the angle is generally 90 degrees. Therefore, such a bellows system mainly has the following two defects: First, because there is a decorative cover installed on the outside of the box body, the hood installation The rear impeller cannot be disassembled and washed. After a long period of use, the impeller will accumulate a large amount of grease, which will cause the air performance of the impeller to decline, and will also damage the dynamic balance of the impeller, resulting in vibration and noise.

[0003] Second, the oil fume passage from the air inlet of the box to the air inlet of the fan is tortuous and complicated. When the smoke flows from the air inlet of the box to the inlet of the fan, a large number of circumvention and vortices are bound to be generated, and the smoking power loss is serious, resulting in relatively high noise. Large, low smoke exhaust efficiency

It is said that this structure breaks through the size limitation in the length direction of the top-suction volute structure, so that the length L can be less than 400mm, which is 100mm-220mm less than the length of the traditional top-suction volute, and the air volume, wind pressure and The noise reaches the specified value, which can well solve the problem that the impeller of the small range hood is difficult to disassemble and wash. However, the air outlet channel is twisted upward while spiraling up. Actual tests show that this structure will cause flow at the fan outlet. The loss is large, which seriously affects the smoke exhaust efficiency, and also increases the aerodynamic noise

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