Series connection double fan type range hood
A technology for range hoods and fans, applied in the field of series double fan type range hoods, can solve the problems of large curvature of connecting pipes, multiple installation spaces, large fluid resistance, etc., to reduce curvature, reduce transition loss, pressure small loss effect
Inactive Publication Date: 2019-07-09
NINGBO FOTILE KITCHEN WARE CO LTD
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Problems solved by technology
These existing designs are often more suitable for larger fan housings, where the connecting pipe between the two-stage fans in series is long and has a large curvature, the resistance of the fluid is bound to be large, and the noise will be large. In addition, More installation space is required in the vertical direction to realize the installation of two-stage fans
Method used
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Embodiment Construction
[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0022] Such as Figure 1~5 As shown, a range hood with series double fans includes a smoke collecting hood 1 and a fan casing 2 arranged above the smoke collecting hood 1 . An air inlet 11 is opened on the above-mentioned smoke collecting hood 1 , and an air inlet grid 12 is arranged on the air inlet 11 . The fan housing 2 is provided with a fan system 5, the fan system 5 includes a primary fan 51 and a secondary fan 52, and the secondary fan 52 is arranged above the primary fan 51, and the air outlet of the primary fan 51 512 communicates with the air inlet 521 of the secondary fan 52 through a connecting pipe 53 . An air outlet hood 3 is arranged on the top of the fan housing 2 , and the air outlet 522 of the secondary fan 52 communicates with the air outlet 3 through the lead-out section 4 .
[0023] In this embodiment, the above-mention...
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The invention relates to a series connection double fan type range hood, which comprises a fan cover, a fan system is arranged in the fan cover, the fan system comprises a first stage fan and a secondstage fan correspondingly, and the second stage fan is arranged above the first stage fan;an air outlet of the first stage fan is connected withan air inlet of the second stage fan through a connecting pipe, the air inlet of the first stage fan is arranged facing forward,the spiral direction of a volute of the first stage fan is opposite to the spiral direction of the volute of the second stage fan, and the projection of the air outlet of the first stage fan at a horizontal plane overlaps with the projection of the air inlet of the second stage fan at the horizontal plane. According to the series connection double fan type range hood, the installation space in the fan cover can be effectively utilized to achieve the purpose of reducing body volume, the length of the connecting pipe can beeffectively reduced, the bending degree of the connecting pipe is reduced so as to reducing the transition loss between twostage fans, and at the same time the running noise of the whole machine canbe reduced.
Description
technical field [0001] The invention relates to the field of range hoods, in particular to a serial double fan type range hood. Background technique [0002] At present, the fan system of the range hood is poor in exhausting the high-resistance pipe network, which greatly affects the adaptability of the range hood and affects the effect of the range hood in the user's state. As a large part of the range hoods in the city are in use, the oil fumes need to be connected to fire protection devices and public flues in addition to their own exhaust pipes, check valves and smoke exhaust channels to discharge the oil fumes. Especially for some residential buildings with higher floors, the public flue is often longer, and the outlet of the public flue is set on the top of the roof, so for the residents on the lower floors, the back pressure of their range hoods will be reduced. Very large, the use of so many resistance devices will greatly reduce the flow rate of the range hood when...
Claims
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IPC IPC(8): F24C15/20
CPCF24C15/20
Inventor 胡泽元孙佳琪李晓强
Owner NINGBO FOTILE KITCHEN WARE CO LTD