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Range hood serially connected with double fans

A range hood and dual fan technology, applied in the field of range hoods, can solve the problems of weak resistance to back pressure and easy backflow, and achieve the effect of improving the smoking ability and strong suction and gathering effect

Active Publication Date: 2017-05-10
NINGBO FOTILE KITCHEN WARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ability of the horizontal fan system to resist back pressure is weak, and it is easy to generate backflow under the condition of back pressure

Method used

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  • Range hood serially connected with double fans
  • Range hood serially connected with double fans
  • Range hood serially connected with double fans

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] see Figure 1 ~ Figure 3 , a range hood with two fans connected in series, comprising a smoke collecting hood 1, a fan cover 2, a first fan 3 and a second fan 4. The smoke collecting hood 1 is provided with an air inlet, the air inlet is provided with a filter screen 5, the first fan 3 is arranged in the fan cover 2, the second fan 4 is arranged above the filter screen 5 and is located in the fan cover 2, the first The fan 3 is located above the second fan 4 . Through the method of connecting the first fan 3 and the second fan 4 in series, the deficiency of the horizontal fan is made up and the advantages of the horizontal fan are strengthened. An air outlet hood 6 is arranged at the air outlet of the first blower 3 for exhausting oily fume from the range hood.

[0021] The first fan 3 is a centrifugal fan, which can adopt the existing structure. The second fan 4 is a centrifugal fan without a volute, including a conical impeller 41 and a motor 42 that drives the coni...

Embodiment 2

[0026] see Figure 4 , In this embodiment, the difference from Embodiment 1 is that the first blower fan 3 is inclined, that is, it is inclined relative to the vertical direction. The angle of the first fan 3 relative to the vertical direction is 0°˜90°.

Embodiment 3

[0028] see Figure 5 and Figure 6 , In this embodiment, the difference from Embodiment 1 is that a flow guide member 45 is arranged inside the conical impeller 41, and the flow guide member 45 is in the shape of a cone with a small bottom and a large top. Because the motor 42 will cause a certain air flow blockage, which will have a certain impact on the air volume of the first middle channel P1 and also increase the noise. Therefore, the air guide member 45 is provided to reduce the impact to a certain extent.

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Abstract

The invention discloses a range hood serially connected with double fans. The range hood comprises an exhaust fume collecting hood, a fan housing and a first fan arranged in the fan housing, wherein an air inlet is formed in the exhaust fume collecting hood. The range hood serially connected with double fans is characterized in that a second fan is arranged at a position, positioned above the air inlet, in the fan housing, and is a centrifugal fan; an air inlet of the second fan faces downwards; a first channel for fume air current to pass through is formed in the middle of the second fan; a second channel for the fume air current to pass through is formed between the periphery of the second fan and the fan housing. The fan of which the air inlet faces downwards is arranged in the fan housing to form the range hood serially connected with the double fans, so that strong negative pressure downwards extending is formed in the middle of the fan, and further a strong sucking and gathering effect on the fume air current under the fan is formed; in addition, rotating motion of an impeller of the fan is transmitted by a viscous shear force or a turbulent shear force of the fluid, so that air current inside the impeller and in a certain extending area of the impeller forms vortex, and further the fume collecting and sucking capability is improved.

Description

technical field [0001] The invention relates to a range hood, in particular to a range hood with two blowers connected in series. Background technique [0002] Range hoods have become one of the indispensable kitchen appliances in modern families. 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 in use, the oil fume needs to be discharged through resistance devices such as smoke exhaust pipes, check valves and smoke exhaust channels. The existence of these resistance devices makes the oil fume have a certain back pressure at the oil fume outlet. The existence of back pressure will greatly affect the exhaust flow of the range hood. The wind pressure of the fan system has a positive effect on the exhaust flow of the range hood, while the existence of back pressure has a negative effect on the exhaust flow...

Claims

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Application Information

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IPC IPC(8): F24C15/20
Inventor 陈浩辉李志峰黄友根茅忠群诸永定李斌
Owner NINGBO FOTILE KITCHEN WARE CO LTD
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