Kitchen ventilator, spiral case and volute tongue thereof

The technology of a range hood and a volute tongue is applied in the field of a volute casing and its volute tongue structure, which can solve the problems of whistling, noise, and difficulty to achieve, and achieve the effects of smooth airflow, noise reduction and low manufacturing cost.

Inactive Publication Date: 2014-01-15
BSH ELECTRICAL APPLIANCES JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In such a structure, when the air flow passes through the volute tongue 51, whistling sound will be generated, resulting in noise
Existing volutes generally use the principle of "active noise reduction" to eliminate noise, that is, artificially form a new sound source with the same amplitude as the noise source but opposite in phase to cancel the original noise. However, after spectrum analysis, the oil fume The noise of the machine is a continuous spectrum with considerable intensity in the range of 6.3Hz to 20KHz. It can be seen that it is difficult to completely eliminate or mostly eliminate

Method used

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  • Kitchen ventilator, spiral case and volute tongue thereof
  • Kitchen ventilator, spiral case and volute tongue thereof
  • Kitchen ventilator, spiral case and volute tongue thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The following combination Figure 4 to Figure 8 The situation of the volute tongue and the volute case in this embodiment will be described in detail. in, Figure 4 to Figure 5 A schematic diagram of the volute provided in this embodiment, Figure 6 to Figure 7 shown in Figure 4 to Figure 5 The volute tongue in the volute shown in, Figure 8 A schematic diagram of the volute for installing the volute tongue provided in this embodiment.

[0042] The volute 2 provided in this embodiment is as Figure 4 As shown above, it is a helical, snail-shaped shell with a body 206 and an air outlet 207 that protrudes along the tangential direction of the circular part of the body. There is a volute tongue 1 where the main body 206 and the air outlet 207 meet.

[0043] In this embodiment, the volute tongue 1 is a separately processed structure, and then installed on the body 206, as Figure 5 shown. In this way, the volute 2 does not need to form a recessed volute tongue stru...

Embodiment 2

[0052] In this embodiment, similar to the first embodiment, the volute tongue has the same inner concave surface, and is additionally installed on the volute case. The difference is that the volute tongue does not have an upper connection surface or a lower connection surface. The volute has a hollow part at a corresponding position, and a flange part is provided on the edge of the hollow part, so as to be suitable for installing the volute tongue. The installation method may also be one of pasting, welding, screw fixing, rivet fixing and the like. The features in other aspects are similar to those in Embodiment 1, and will not be repeated here.

Embodiment 3

[0054] In this embodiment, the volute tongue is the same as the volute tongue in the first embodiment.

[0055] The volute has hollow parts at corresponding positions adapted to install the volute tongue. The volute tongue can also be installed in the volute by sticking, welding, etc., or an external connection part (not shown) is provided on the edge of the upper connecting surface and the lower connecting surface away from the inner concave surface. , to fit on the volute. Correspondingly, the external connection part may be a convex line adapted to the shape of the inner surface of the volute, so as to be suitable for sticking, welding, screw fixing, rivet fixing and the like. Alternatively, the outer connection part is set as a clamping foot, so as to be suitable for being installed on the volute in a clamping manner, and correspondingly, a bayonet is provided at the edge of the hollow part of the volute, so as to be suitable for installing the volute tongue.

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Abstract

The present invention provides a kitchen ventilator, a spiral case and a volute tongue thereof. The volute tongue comprises a concave surface, wherein the concave surface is a concave smooth curved surface. According to the present invention, the volute tongue is provided with the concave structure, such that airflow at the volute tongue position is smooth so as to significantly reduce noise; the volute tongue can be the independently and additionally processed structure so as to provide characteristics of easy and precise molding and easy processing; and the spiral case is easy to manufacture, and the ventilator with the spiral case has a low noise advantage.

Description

technical field [0001] The invention relates to a range hood, in particular to a volute and a volute tongue structure for the range hood. Background technique [0002] Now, the range hood has become one of the requisite kitchen equipment in ordinary families, however, the noise of the range hood exists anyway. The noise generally comes from two aspects: one is the noise of the fan itself, and the other is the noise generated by the airflow flowing in the fan volute. [0003] The volute of the range hood is generally as figure 1 As shown, its structure is shaped like a snail shell, with a body 52 and an air outlet 57 . Generally, the body 52 is substantially circular, and the air outlet 57 protrudes along a tangential direction of the circle. A section of the naturally formed recessed structure toward the volute at the intersection of the body 52 and the air outlet 57 is the volute tongue 51, such as figure 2 and image 3 shown, where image 3 yes figure 2 Sectional ...

Claims

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Application Information

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IPC IPC(8): F24C15/20
Inventor 唐俊杰杨磊夏兆阳
Owner BSH ELECTRICAL APPLIANCES JIANGSU
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