Air inlet ring assembly, fan system and extractor hood

Abstract

The invention discloses an air inlet ring assembly. The air inlet ring assembly comprises an air inlet ring with an axis and a pre-rotating device. The air inlet ring comprises a radial extending partand an axial flow guide part, wherein the radial extending part is annular around the axis, and the axial flow guide part is located on the radial inner side of the radial extending part and extendsalong the axis. The air inlet ring assembly is characterized in that the pre-rotating device comprises a first-stage pre-rotating mechanism, the first-stage pre-rotating mechanism is arranged on the first side, in the axial direction, of the radial extending part, the axial flow guide part is arranged on the second side, opposite to the first side, of the radial extending part in the axial direction, the first-stage pre-rotating mechanism comprises a first-stage shifting piece which is pushed by the pressure difference of the two sides, in the axial direction, of the radial extending part to rotate, and a rotating shaft of the first-stage shifting piece is parallel to the axis. The invention further discloses a fan system with the air inlet ring assembly and an extractor hood with the fansystem.

Description

technical field [0001] The invention relates to a power system, in particular to an air inlet ring assembly, a fan system using the above air inlet ring assembly, and a range hood using the above fan system. Background technique [0002] Since the range hood entered China in the 1990s, it has become an indispensable kitchen appliance for ordinary people. Its main function is to inhale the cooking fume generated by the user from the air inlet through the impeller of the fan system, use the air inlet filter and impeller to filter the fume, and discharge the filtered fume from the air outlet, thereby completing the purification of the kitchen environment. The fan system is the core component of the range hood, and its working status has an important impact on the effect of the range hood. In order to ensure the high-efficiency operation of the system and maintain a good range hood effect, the air intake of the fan system is very important. [0003] In order to ensure the worki...

AI Technical Summary

Problems solved by technology

[0006] Although this structure can assist in changing the direction of the airflow, it needs to install additional active structures, such as motors, etc., which increases the power consumption of the range hood, and additional heat will be generated when the structure is working, making it difficult to enter The airflow temperature of the fan system is higher, and it is easy to cause the temperature rise of the motor of the fan system to exceed the standard, which will reduce the working efficiency of the whole machine

In addition, this type of active pre-rotation structure is completely independent of the fan system when working, so that it can only achieve a better auxiliary effect under the specific working state of the range hood, which limits the working state of the range hood and seriously reduces the size of the range hood. The scope of application reduces the functional characteristics of the range hood

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