Series-connection dual-fan type range hood and flow control method thereof

Abstract

The invention discloses a series-connection dual-fan-type range hood. A primary fan and a secondary fan which are connected in series are installed inside a fan frame, a first detection device used for detecting the flow of the primary fan and a second detection device used for detecting the flow of the secondary fan are further arranged in the fan frame, the signal output end of the first detection device and the signal output end of the second detection device are electrically connected with the signal input end of a controller, and the signal output end of the controller is electrically connected with fan motor driving modules of the primary fan and the secondary fan. The invention further discloses a flow control method of the range hood. The controller of the series-connection dual-fan-type range hood can obtain the flow difference value of the primary and secondary two-stage fans according to output signals detected by the first detection device and the second detection device, and correspondingly adjust the rotating speeds of the primary fan and the secondary fan, so that the flow of the primary fan and the flow of the secondary fan are in dynamic balance in the design valuerange under different working conditions, and the oil fume suction effect of the range hood under different working conditions is ensured.

Description

technical field [0001] The invention relates to a range hood with double fans in series, in particular to a range hood with double fans in series and a flow control method thereof. Background technique [0002] Chinese cooking will produce a lot of oily fumes. In order to keep the kitchen environment clean and the human body healthy, range hoods have become one of the essential equipment in modern home kitchens. However, the floors of modern residences are usually higher, and residents on different floors of the same building connect range hoods to the public flue for smoke exhaust, which will inevitably cause the back pressure of the public flue to rise sharply during the peak cooking period, causing It is difficult to extract smoke from the range hood. The exhaust air flow rate of the range hood in use mainly depends on the wind pressure of the range hood fan system, the greater the wind pressure, the greater the exhaust air flow. When ordinary household range hoods are ...

AI Technical Summary

Problems solved by technology

However, in the existing technology, it is impossible to monitor the flow of the two fans in real time, which leads to the inability of the series fans to work according to the design value under different working conditions. During use, there will be loud noises, and the vibration of the whole machine will affect people's cooking experience.

For example, when the output air volume of the primary fan greatly exceeds the air volume inhaled by the secondary fan, causing the secondary fan to have no time to discharge or convert the air volume, the secondary fan instead becomes the main resistance of the primary fan, resulting in flow loss of the primary fan Intensified, and the impeller dynamic balance of the secondary fan will be damaged by the air volume output by the primary fan, which will cause the secondary fan to vibrate and increase the noise

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