CN116336001A - Fan, control method and central purification system - Google Patents

Abstract

The invention discloses a fan, a control method and a central purification system. The fan includes: a volute, an air outlet grille and an adjusting member, the volute has an air outlet, and the outlet grille has a plurality of blades. The blades are spaced and rotatably arranged on the air outlet along the up and down direction, and a plurality of the blades move synchronously, and the adjusting member is arranged on at least one of the blades, and is used to drive The blades rotate relative to the volute. As a result, the uniformity of the airflow at the air outlet of the fan is higher, which can avoid air concentration in the lower area of the air outlet, thereby avoiding a negative pressure area in the upper side of the air outlet, so as to improve the working noise of the fan.

Description

Fan, control method and central purification system

technical field

The invention relates to the field of household electrical appliances, in particular to a fan, a control method and a central purification system.

Background technique

In the related technology, the central purification system adopts the power distribution system to evenly distribute the air volume of each merchant, and extracts and filters the oil fume in the flue through the fan and purifier, which can effectively purify the air, so it can be applied in various shopping malls, hotels, etc.

The fan is used as the power device for extracting oil fumes. The air enters the volute after being accelerated by the impeller, and flows to the outlet along the shape of the volute. However, due to inertia and gravity, most of the air will be concentrated on the lower side of the air outlet, which will cause uneven flow at the air outlet of the fan. At the same time, due to the influence of the volute tongue, a small negative pressure area will also be generated, resulting in noise. .

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a blower fan, which has uniform air output and low working noise.

The present invention also proposes a control method for the above fan.

The present invention further proposes a central purification system that adopts the above-mentioned blower and is controlled based on the above-mentioned control method.

The fan according to the embodiment of the first aspect of the present invention includes: a volute, an air outlet grille, and an adjusting member, the volute has an air outlet, the outlet grille has a plurality of blades, and the plurality of blades are arranged along the upper and lower The direction is spaced and rotatably arranged on the air outlet, and a plurality of the blades move synchronously. The adjustment member is arranged on at least one of the blades, and is used to drive the blade with the adjustment member relative to all the blades. The volute rotates.

According to the fan of the embodiment of the present invention, the uniformity of the air flow at the air outlet of the fan is higher, which can avoid the concentration of air flow in the lower area of the air outlet, and further avoid the occurrence of negative pressure area in the upper side of the air outlet, so as to improve the working noise of the fan.

According to some embodiments of the present invention, the outlet grille further includes: a connecting piece connected to a plurality of the vanes and adapted to drive the plurality of vanes to move synchronously.

Further, the adjusting member is arranged on the air inlet side of the blade, and the connecting member is arranged on the air outlet side of the blade.

In some embodiments, on the wind inlet side, the distance between adjacent blades gradually increases from top to bottom.

In some embodiments, on the wind outlet side, the distances between adjacent blades are equal.

According to some embodiments of the present invention, the blades are arc-shaped in the airflow direction.

According to some embodiments of the present invention, the fan further includes: a driving member, which is disposed on the volute and used to transmit power to the regulating member.

Further, the adjustment member is configured as an adjustment rod, and the adjustment rod is formed as a non-round rod.

The fan control method according to the second aspect of the present invention includes:

Obtain the upper layer flow velocity U1 and the lower layer flow velocity U2 of the air outlet area; wherein, the air outlet area is divided into an upper layer area and a lower layer area in the up and down direction, the upper layer flow rate is the gas flow rate in the upper layer area, and the lower layer flow rate is the lower layer flow rate gas flow rate in the area;

Based on the flow velocity difference between the upper layer flow velocity and the lower layer flow velocity, the angle between the air inlet side end of the blade and the air outlet is adjusted.

Further, the adjustment of the angle between the end of the air inlet side of the blade and the air outlet based on the flow velocity difference between the upper layer flow velocity and the lower layer flow velocity specifically includes:

If the flow velocity difference is less than or equal to the first threshold, then adjust the angle of the blade with the first adjustment threshold;

If the flow velocity difference is greater than the first threshold, the angle of the blades is adjusted with a second adjustment threshold, wherein the first adjustment threshold is smaller than the second adjustment threshold.

Further, the control method further includes: adjusting the blade angle with the second adjustment threshold, and after the flow velocity difference is less than or equal to a first threshold, adjusting the blade angle with the first adjustment threshold.

The central purification system according to the embodiment of the third aspect of the present invention includes: the fan described in the above embodiment, and is controlled based on the control method described in the above embodiment.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and understandable from the description of the embodiments in conjunction with the following drawings, wherein:

1 is a schematic diagram of a fan according to an embodiment of the present invention;

2 is a schematic cross-sectional view of a fan according to an embodiment of the present invention;

Fig. 3 is another schematic diagram of the fan according to the embodiment of the present invention;

4 is a schematic diagram of an outlet grill according to an embodiment of the present invention;

FIG. 5 is a flowchart of a control method according to an embodiment of the present invention.

Reference signs:

fan 100,

Volute 10, air outlet 11,

Outlet grille 20, blades 21, connectors 22,

Adjusting part 30, driving part 40, detecting part 50,

Air inlet side a, air outlet side b.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

The fan 100 , the control method and the central cleaning system according to the embodiment of the present invention are described below with reference to FIGS. 1-5 .

As shown in FIG. 1 and FIG. 4 , the fan 100 according to the embodiment of the first aspect of the present invention includes: a volute 10 , an outlet grill 20 and an adjusting member 30 .

Wherein, the volute 10 has an air outlet 11, the air outlet grille 20 has a plurality of blades 21, the blades 21 are arranged on the air outlet 11 at intervals along the vertical direction and are rotatable, the plurality of blades 21 move synchronously, and the adjusting member 30 is arranged on the air outlet 11. At least one blade 21 is used to drive the blade 21 provided with the adjustment member 30 to rotate relative to the volute 10 .

Specifically, the volute 10 is provided with an impeller, and the rotation of the impeller drives the airflow to enter from the air inlet on the axial direction of the volute 10 and flow out from the air outlet 11 on the side of the volute 10. The air outlet 11 is provided with an air outlet The grille 20, the outlet grille 20 can guide the outflow airflow.

Exemplarily, the outlet grille 20 further includes a connecting piece 22, which is connected to a plurality of blades 21, and the multiple blades 21 are adapted to move synchronously under the drive of the connecting piece 22, and the adjusting piece 30 can be configured as an adjusting rod, The connecting piece 22 can be configured as a connecting rod.

It can be understood that the airflow enters the volute 10 after being accelerated by the impeller, and flows along the profile of the volute 10 to the outlet. However, due to the effects of inertia and gravity, most of the airflow will be concentrated on the lower side of the air outlet 11, which will cause the flow of the air outlet 11 of the fan 100 to be uneven. The left and right walls of the volute 10 are respectively provided with through holes corresponding to the adjustment member 30, and the adjustment member 30 is fixed on the left and right sides of the volute 10 through the through holes, and then the outlet grille 20 is fixed, and the outlet grille 20 is the last The upper blade 21 needs to be in contact with the volute tongue during installation, which can close the space between the volute tongue and the flange of the air outlet 11, so that the fluid flows out from the air outlet 11 and directly flows into the external air duct, preventing air from flowing into the volute tongue and the air outlet. 11 Negative pressure is generated between the flanges to improve the working noise of the fan 100.

Based on this, the present invention further arranges an adjusting member 30 on the outlet grille 20, and the blade 21 provided with the adjusting member 30 is driven to rotate through the adjusting member 30, and a plurality of blades 21 are connected through the connecting member 22, and the blade 21 provided with the adjusting member 30 The rotation of the blade 21 drives the movement of the connecting piece 22 at the same time, and the movement of the connecting piece 22 synchronously drives the movement of other blades 21 to adjust the deflection angle of multiple blades 21 to achieve the purpose of rectification and make the air flow uniformity of the air outlet 11 higher.

According to the blower fan 100 of the embodiment of the present invention, the uniformity of the airflow of the air outlet 11 of the blower fan 100 is higher, which can avoid the concentration of air flow in the lower area of the air outlet 11, thereby avoiding the negative pressure area on the upper side of the air outlet 11, so as to improve the fan 100. working noise.

Referring to FIG. 4 , according to some embodiments of the present invention, the adjusting member 30 is arranged on the air inlet side a of the blade 21 , and the connecting member 22 is arranged on the air outlet side b of the blade 21 .

That is to say, the adjustment member 30 adjusts the angle between each blade 21 and the air outlet direction of the air outlet 11 on the air inlet side a of the blade 21, and makes the angle between adjacent blades 21 on the air inlet side a The spacing gradually increases from top to bottom, and on the wind outlet side b, the spacing between adjacent blades 21 is equal.

In this way, not only can the problem of uneven air flow at the air outlet 11 be improved, the problem of local negative pressure areas generated between the volute tongue and the fixed flange of the air outlet 11 can be solved, but also the turbulent flow caused by the turbulent pressure pulsation in the area of the air outlet 11 can be reduced Noise and flow turbulence phenomenon, reduce energy loss, improve fan 100 energy efficiency.

Wherein, the ends of the blades 21 can be provided with connecting flanges, the connecting flanges on the air inlet side a are hinged to the adjusting member 30, and the connecting flanges on the air outlet side b are hinged to the connecting member 22, and the adjusting member 30 can be one , set on one of the plurality of blades 21, the blade 21 provided with the adjusting member 30 is formed as the driving blade 21, and the other blades 21 can be linked together under the drive of the connecting member 22 to form the driven blade 21, and the adjusting member 30 leaves There may be two or more, for example, if the number of the adjusting member 30 is consistent with the number of the blades 21 , then the plurality of blades 21 are all formed as driving blades 21 .

As shown in Fig. 2, Fig. 3 and Fig. 4, according to some embodiments of the present invention, the vane 21 is arc-shaped in the airflow direction, thus, the arc-shaped vane 21 guides the airflow, reducing the impact on the vane 21. impact, and can improve the rectification effect of the air outlet grille 20.

As shown in FIG. 1 , according to some embodiments of the present invention, the fan 100 further includes: a driving member 40 disposed on the volute 10 and used for transmitting power to the adjusting member 30 . Thus, the adjusting member 30 can be driven to rotate by the driving member 40. In the embodiment where there is one adjusting member 30, the power output end of the driving member 40 can be directly connected with the adjusting member 30. In the embodiment where there are multiple adjusting members 30 Among them, a transmission structure is provided between the driving member 40 and the adjusting member 30, the transmission structure has a plurality of power output parts, and each power output part is connected to one adjusting member 30 respectively.

Preferably, the adjustment member 30 is configured as an adjustment rod, and the adjustment rod is formed as a non-round rod, such as a hexagonal rod, a rectangular rod, etc., so that the power transmission effect between the adjustment member 30 and the blade 21 is better, and the blade 21 Adjustments are more responsive.

As shown in FIG. 5, the control method of the fan 100 according to the second embodiment of the present invention includes:

Obtain the upper layer flow velocity U1 and the lower layer flow velocity U2 of the air outlet 11 area (the detection piece 50 can be set on the air outlet pipe communicated with the air outlet 11, and can be detected by the detection piece 50); wherein, the air outlet 11 area is divided in the up and down direction are the upper zone and the lower zone, the upper zone velocity is the gas velocity in the upper zone, and the lower zone velocity is the gas velocity in the lower zone;

Based on the flow velocity difference between the upper layer flow velocity and the lower layer flow velocity, the angle between the end of the blade 21 on the air inlet side a and the air outlet 11 is adjusted.

Specifically, the upper flow velocity in the upper region and the lower flow velocity in the lower region can be obtained, and at least based on the flow velocity difference between the upper flow velocity and the lower flow velocity, the angle between the blade 21 and the air outlet 11 can be adjusted to achieve a uniform outlet. wind.

Of course, the control method of the embodiment of the present invention is not limited thereto. In some other embodiments, a detection element 50 may be provided on the volute 10, and in two adjacent blades 21, the gas flow rate in the area where the upper blade 21 is located It is defined as the upper layer flow velocity, and the gas flow velocity in the area where the lower blades 21 are located is defined as the lower layer flow velocity. Specifically, the number of blades 21 of the air outlet grille 20 can be two, three or more, and the uppermost blade 21 is connected to the air outlet 11. The air outlet area between the upper surfaces is defined as the first air outlet area, the air outlet area between adjacent blades 21 is defined as the second air outlet area to the N-1th air outlet area, the bottom blade 21 and the air outlet 11 The air outlet area between the lower surfaces is defined as the Nth area, and the detection part 50 can be used to obtain the flow velocity of each air outlet area, and at least based on the flow velocity difference between the upper layer flow velocity and the lower layer flow velocity, the blade 21 and the air outlet The included angle between 11 is adjusted to achieve uniform air discharge.

Exemplarily, there are three blades 21, correspondingly having a first air outlet area, a second air outlet area, a third air outlet area and a fourth air outlet area, the flow velocity of the first air outlet area is compared with that of the second air outlet area , and adjust the angle, compare the flow velocity of the second air outlet area with the third air outlet area, and adjust the angle, compare the flow velocity of the third air outlet area with the fourth area, and adjust the angle so that the adjacent air outlet The difference in flow velocity between areas is smaller, and the uniformity of air outlet is higher.

According to the control method of the fan 100 in the embodiment of the present invention, firstly, an adjustable air outlet grille 20 is added to the air outlet 11, which can solve the problems of uneven air flow at the air outlet 11 of the fan 100 and a small range of negative pressure on the upper side of the air outlet 11. However, by adjusting the flow velocity of multiple air outlet areas and controlling the blades 21 to rotate to an optimal angle, the swirl noise and energy loss caused by turbulent pressure fluctuations at the air outlet 11 of the fan 100 can be minimized.

As shown in FIG. 5 , based on the flow velocity difference between the upper layer flow velocity and the lower layer flow velocity, adjusting the angle between the end of the air inlet side a of the blade 21 and the air outlet 11 specifically includes:

If the flow velocity difference is less than or equal to the first threshold, then adjust the angle of the blade 21 with the first adjustment threshold;

If the flow velocity difference is greater than the first threshold, the angle adjustment of the blade 21 is performed at the second adjustment threshold, wherein the first adjustment threshold is smaller than the second adjustment threshold.

That is to say, when the flow velocity difference is large, adjust the angle of the blade 21 with a large value; The response speed can meet the needs of use and realize fast and reliable angle adjustment.

Exemplarily, if the flow velocity difference between the upper layer flow velocity and the lower layer flow velocity is less than or equal to 10% of the lower layer flow velocity, adjust the angle according to the first adjustment threshold (such as: 1 degree to 5 degrees); if the flow velocity difference between the upper layer flow velocity and the lower layer flow velocity If it is greater than 10% of the flow velocity in the lower layer, the angle is adjusted at the second adjustment threshold (eg, 5 degrees to 10 degrees).

Further, the control method further includes: adjusting the angle of the blade 21 with the second adjustment threshold, and after the flow velocity difference is less than or equal to the first threshold, adjusting the angle of the blade 21 with the first adjustment threshold.

That is to say, the adjustment is performed according to the second adjustment threshold, and when the difference between the flow velocity of the upper layer and the flow velocity of the lower layer is less than 10% of the flow velocity of the lower layer, the adjustment is further switched to the first adjustment threshold to improve the angle adjustment accuracy.

The central purification system according to the embodiment of the third aspect of the present invention includes: the fan 100 in the above-mentioned embodiment, and is controlled based on the control method in the above-mentioned embodiment, and has the same technical effect as the above-mentioned fan 100 and the control method. This will not be repeated here.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

In the description of the present invention, "first feature" and "second feature" may include one or more of these features.

In the description of the present invention, "plurality" means two or more.

In the description of the present invention, a first feature being "on" or "under" a second feature may include that the first and second features are in direct contact, and may also include that the first and second features are not in direct contact but pass through them. Additional feature contacts between.

In the description of the present invention, "above", "above" and "above" a first feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher than Second feature.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (12)

1. A blower, comprising:

a volute (10), the volute (10) having an air outlet (11);

the air outlet grille (20), the air outlet grille (20) is provided with a plurality of blades (21), the blades (21) are arranged on the air outlet (11) at intervals along the up-down direction in a rotatable mode, and the blades (21) move synchronously;

the adjusting piece (30) is arranged on at least one blade (21) and is used for driving the blade (21) provided with the adjusting piece to rotate relative to the volute (10).

2. The fan according to claim 1, wherein the air outlet grille (20) further comprises: and the connecting piece (22) is connected with a plurality of the blades (21) so as to enable the blades (21) to be linked.

3. A fan according to claim 2, characterized in that the adjusting member (30) is arranged on the inlet side (a) of the blade (21), and the connecting member (22) is arranged on the outlet side (b) of the blade (21).

4. A fan according to any one of claims 1-3, characterized in that on the air intake side (a) the spacing between adjacent blades (21) increases gradually from top to bottom.

5. A fan according to any one of claims 1-3, characterized in that on the air outlet side (b), the spacing between adjacent blades (21) is equal.

6. A fan according to claim 1, characterized in that the blades (21) are curved in the direction of the air flow.

7. The blower of claim 1, further comprising: and the driving piece (40) is arranged on the volute (10) and is used for transmitting power to the adjusting piece (30).

8. The fan according to claim 7, characterized in that the adjusting member (30) is configured as an adjusting lever and the adjusting lever is formed as a non-round lever.

9. A method of controlling a fan, comprising:

acquiring upper-layer flow velocity U1 and lower-layer flow velocity U2 of an air outlet (11) area; the air outlet area is divided into an upper layer area and a lower layer area in the up-down direction, wherein the upper layer flow rate is the gas flow rate in the upper layer area, and the lower layer flow rate is the gas flow rate in the lower layer area;

and adjusting an included angle between the end part of the air inlet side (a) of the blade (21) and the air outlet (11) based on the flow velocity difference value of the upper flow velocity and the lower flow velocity.

10. The method for controlling a blower according to claim 9,

the adjusting the included angle between the end part of the air inlet side (a) of the blade (21) and the air outlet (11) based on the flow velocity difference value between the upper flow velocity and the lower flow velocity specifically comprises:

if the difference value of the flow velocity is smaller than or equal to a first threshold value, the angle of the blade (21) is adjusted by the first adjustment threshold value;

if the flow rate difference is greater than a first threshold, an angular adjustment of the vane (21) is performed with a second adjustment threshold, wherein the first adjustment threshold is smaller than the second adjustment threshold.

11. The method of controlling a wind turbine of claim 10, wherein the method of controlling further comprises: and adjusting the angle of the blade (21) by the second adjustment threshold value, and after the flow speed difference value is smaller than or equal to a first threshold value, adjusting the angle of the blade (21) by the first adjustment threshold value.

12. A central purification system, comprising: the wind turbine of any of claims 1-8, and controlled based on the control method of any of claims 9-11.

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