Draught fan for range hood and range hood comprising draught fan

Abstract

The utility model discloses a draught fan for a range hood and the range hood comprising the draught fan. The draught fan for the extractor hood comprises a volute and an air inlet and further comprises a driving part, a connecting mechanism and an air inlet adjusting part, the air inlet adjusting part is arranged in the center area of the air inlet in a suspended mode through the connecting mechanism, and the driving part drives the end, connected with the air inlet adjusting part, of the connecting mechanism to move. The air inlet adjusting part is driven by the connecting mechanism to move in the direction away from or close to the air inlet. According to the smoke exhaust resistance change of the rear end of the range hood, the air inflow of the fan is in a corresponding better state, so that the noise and the flow disorder state are reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The utility model relates to the field of range hoods. Background Art

[0002] Existing range hoods generally suck out oil smoke through fans. There are various types of fans. For example, multi-blade centrifugal fans are widely used in various household appliances such as air conditioners, range hoods, air purifiers, and ventilation fans due to their compact structure, high pressure coefficient, large flow coefficient, and low noise.

[0003] Usually, after being applied to a range hood, the type and working parameters of the fan itself are determined by the fan and cannot be adjusted. However, the exhaust resistance at the rear end of the range hood may change at any time. When the exhaust resistance at the rear end is small, noise is likely to be generated, while when the exhaust resistance at the rear end is large, the air inlet is likely to have a turbulent flow state. In some products, adaptive adjustment technology is used to adjust the fan impeller speed by changing the motor power according to the resistance environment of the range hood. However, this method not only requires the control of the motor, but also has high requirements for the motor, and the cost of implementation is relatively high. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defect that the fan for range hood in the prior art cannot adapt to the changes of different rear end smoke exhaust resistances, and to provide a fan for range hood and a range hood including the same.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A fan for a range hood comprises a volute and an air inlet. The fan for the range hood also comprises a driving component, a connecting mechanism and an air intake regulating part. The air intake regulating part is suspended in the central area of ​​the air inlet through the connecting mechanism. The driving component drives the connecting mechanism to move one end of the air intake regulating part connected to the connecting mechanism, and drives the air intake regulating part to move in a direction away from or close to the air inlet through the connecting mechanism.

[0007] In this solution, the air intake space in the three-dimensional space can be adjusted by moving the air intake adjustment part away from and towards each other, thereby adjusting the air intake volume. The air intake adjustment part located in the central area can shield a part of the airflow directly entering the air inlet from the middle area. When the exhaust resistance at the rear end of the range hood is small, the overall air intake volume of the fan is large, so that the movement of the air intake adjustment part away from each other makes the air intake space larger, thus maintaining smooth air intake and avoiding increased noise; when the exhaust resistance at the rear end of the range hood is large, the overall air intake volume of the fan is small, so that the movement of the air intake adjustment part towards each other makes the air intake space smaller, which can reduce the attenuation of the fan inlet speed and ensure the oil fume extraction effect during actual use under the same fan flow rate. At the same time, the reduction of the air intake space can suppress the flow turbulence (rectification) of the air inlet under high resistance conditions to a certain extent and shield the outward radiation of noise, which is conducive to reducing noise.

[0008] Preferably, the projected area of ​​the air intake regulating part on the plane where the air intake is located is 0.1-0.4 times the area of ​​the air intake. Thus, after the air intake space is reduced, the air intake regulating part can play the role of rectification and noise shielding without reducing the air intake space too much to deteriorate the fan performance.

[0009] Preferably, the connecting mechanism realizes the movement of one end of the connecting mechanism connected to the air intake regulating part by the overall movement of the connecting mechanism itself, thereby making the movement of the air intake regulating part more stable.

[0010] Preferably, the connecting mechanism realizes the movement of one end of the connecting mechanism connected to the air intake regulating portion by its own deformation, thereby enabling the connecting mechanism to have different shapes in different states to reduce the occupied space.

[0011] Preferably, the connecting mechanism is a connecting rod mechanism including at least two connecting rods hinged together, the driving component is connected to one of the connecting rods, and the air intake regulating part is connected to another of the connecting rods. The connecting rod mechanism can be conveniently folded and deformed in a small occupied space. In addition, the connecting rod mechanism is easy to maintain and control.

[0012] Preferably, the number of the connecting rod mechanisms is at least two, and each connecting rod mechanism is connected to at least two positions on the circumference of the air intake regulating part. A plurality of connecting rod mechanisms can more evenly support and drive the movement of the air intake regulating part.

[0013] Preferably, the connecting rods of each connecting rod mechanism connected to the air intake regulating part are all hingedly connected to the air intake regulating part. The air intake regulating part is constrained to move in a fixed posture through a plurality of hinged connecting rods, thereby ensuring the stability and consistency of the adjustment of the air intake space.

[0014] Preferably, the driving component is a motor, and the motor is fixedly connected to the volute. The motor control is simple, and the synchronous control of multiple motors is more stable, which can ensure that the force at various locations of the air intake regulating part is relatively uniform.

[0015] Preferably, the fan for the range hood further comprises an air inlet ring connected to the volute, the air inlet ring being located at the periphery of the air inlet, and an upwardly raised guide surface being formed on the inner ring side of the air inlet ring close to the air inlet. The guide surface and the air inlet regulating portion together can guide the air inlet in all directions between the air inlet and the air inlet regulating portion in the three-dimensional space.

[0016] Preferably, the portion of the connecting mechanism close to the guide surface is configured to be in a shape that fits the guide surface, so that the connecting mechanism and the guide surface do not interfere with each other, and the air intake adjustment part can be moved to a position closer to the air inlet as much as possible.

[0017] A range hood, comprising the fan for the range hood.

[0018] The positive progressive effect of the utility model is that the utility model can make the air intake of the fan in a correspondingly optimal state according to the change of the smoke exhaust resistance at the rear end of the range hood, thereby reducing noise and flow turbulence and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the fan for a range hood in a deformed state according to a preferred embodiment of the utility model.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the fan for a range hood in another deformed state according to a preferred embodiment of the utility model.

[0021] Figure 3 The figure is a top view of a fan for a range hood according to a preferred embodiment of the utility model.

[0022] Figure 4 It is a schematic side structural diagram of a fan for a range hood in a deformed state according to a preferred embodiment of the utility model.

[0023] Figure 5 It is a schematic side structural diagram of the fan for a range hood in another deformed state according to a preferred embodiment of the utility model.

[0024] Figure 6 It is a schematic diagram of the connection mechanism of the fan for the range hood according to the preferred embodiment of the utility model.

[0025] Figure 7 This is a schematic diagram of the cooperation between the connecting mechanism and the air inlet ring of a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0026] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0027] like Figure 1-Figure 7 As shown, this preferred embodiment discloses a fan for a range hood, comprising a volute 400 and an air inlet 500, and the fan for a range hood further comprises a driving component 300, a connecting mechanism 200 and an air inlet regulating portion 100. The air inlet regulating portion 100 is suspended in the central area of ​​the air inlet 500 through the connecting mechanism 200, and the driving component 300 drives the connecting mechanism 200 to move one end of the air inlet regulating portion 100, and drives the air inlet regulating portion 100 to move in a direction away from or close to the air inlet 500 through the connecting mechanism 200.

[0028] The air intake regulating portion 100 in this embodiment is set to be circular, and may be other shapes in other embodiments. The air intake regulating portion 100 may be plate-shaped or other shapes having a projected area on the plane where the air inlet is located.

[0029] like Figure 1 and Figure 2 ,as well as Figure 4 and Figure 5 As shown in FIG. 1 , by moving the air intake adjustment unit 100 away from or near to each other, the air intake space in the three-dimensional space can be adjusted, thereby adjusting the air intake volume. The air intake adjustment unit 100 located in the central area can shield a portion of the airflow that directly enters the air inlet 500 from the middle area. When the exhaust resistance at the rear end of the range hood is small, the overall air intake volume of the fan is large. Figure 4 As shown, the movement of the air intake adjustment part 100 away from the intake space makes the air intake space larger, and the airflow can enter from more angles on the side, thereby maintaining smooth air intake and avoiding increasing noise. Figure 5 As shown, when the exhaust resistance at the rear end of the range hood is large, the overall air intake of the fan is small, so that the approaching movement of the air intake adjustment part 100 makes the air intake space smaller, thereby allowing less airflow at other angles to bypass the air intake adjustment part 100 and enter the air inlet 500, for example, making it enter almost in a straight line. In this way, the speed of the air inlet 500 can be less attenuated, thereby ensuring the oil fume extraction effect during actual use under the same fan flow rate. At the same time, the reduction of the air intake space can suppress the flow turbulence state (rectification) of the air inlet 500 under high resistance conditions to a certain extent and shield the outward radiation of noise, which is conducive to reducing noise.

[0030] like Figure 3As shown, in a preferred embodiment, the projected area of ​​the air intake regulating part 100 on the plane where the air intake port 500 is located is 0.1-0.4 times the area of ​​the air intake port 500. Therefore, after the air intake space is reduced, the air intake regulating part 100 can not only play the role of rectifying and shielding noise, but also does not reduce the air intake space too much to deteriorate the fan performance.

[0031] In a preferred embodiment, the connecting mechanism 200 moves the end of the connecting mechanism 200 connected to the air intake regulating part 100 by moving the connecting mechanism 200 as a whole, thereby making the movement of the air intake regulating part 100 more stable. For example, in some embodiments, the connecting mechanism 200 may be a rack, and the driving component 300 may be a motor connected to a gear, and the gear and the rack may be meshed to drive the rack as the connecting mechanism 200 to move linearly as a whole. For example, in other embodiments, the connecting mechanism may be a movable sleeve with an internal thread, and the driving component 300 may be a motor connected to a screw rod, and the screw rod may drive the movable sleeve as the connecting mechanism to move linearly as a whole.

[0032] In a preferred embodiment, the connecting mechanism 200 realizes the movement of one end of the connecting mechanism 200 connected to the air intake regulating part 100 by its own deformation. Thus, the connecting mechanism 200 can have different shapes in different states to reduce the occupied space. For example, in some embodiments, the connecting mechanism 200 can be a crank slider mechanism, and the driving component 300 is a motor. The crank of the crank slider mechanism is driven by the motor, so that the slider connected to the air intake regulating part 100 moves linearly.

[0033] like Figure 6 As shown, in this embodiment, the connecting mechanism 200 is preferably a connecting rod mechanism including at least two connecting rods 210 and 220 hinged together, the driving component is connected to one of the connecting rods 220, and the air intake adjustment part 100 is connected to the other connecting rod 210. The connecting rod mechanism can be conveniently folded and deformed in a small occupied space. In addition, the connecting rod mechanism is easy to maintain and easy to control.

[0034] like Figure 6 As shown, in this embodiment, there are three connecting rod mechanisms, each of which is connected to at least two positions in the circumferential direction of the air intake adjustment portion 100. Multiple connecting rod mechanisms can support and drive the movement of the air intake adjustment portion 100 more evenly.

[0035] like Figure 6As shown, in this embodiment, the connecting rods 210 of each connecting rod mechanism connected to the air intake regulating part 100 are preferably hingedly connected to the air intake regulating part 100. The air intake regulating part 100 is constrained to move in a fixed posture through a plurality of hinged connecting rods 210, thereby ensuring the stability and consistency of the regulation of the air intake space. Specifically, the upward movement forces of the three connecting rods 210 are combined, and the inward movement forces are offset, thereby enabling the air intake regulating part 100 to maintain a fixed posture, such as a horizontal posture for lifting and lowering, thereby achieving movement close to or away from the air inlet 500.

[0036] like Figure 6 As shown, in this embodiment, the driving component 300 is a motor, and the motor can be fixed on the air inlet ring 600 or the volute 400, so that the motor is fixedly connected relative to the volute 400. The motor control is simple, and the synchronous control of multiple motors is more stable, which can ensure that the force at various locations of the air intake adjustment part 100 is relatively uniform.

[0037] like Figure 7 As shown, in this embodiment, the fan for the range hood preferably further includes an air inlet ring 600 connected to the volute 400, the air inlet ring 600 is located at the periphery of the air inlet 500, and an upwardly raised guide surface 610 is formed on the inner ring side of the air inlet ring 600 close to the air inlet 500. The guide surface 610 and the air inlet adjustment portion 100 can guide the air inlet in all directions between the air inlet 500 and the air inlet adjustment portion 100 in the three-dimensional space.

[0038] like Figure 7 As shown, in this embodiment, the portion 211 of the connection mechanism 200 close to the guide surface 610 is set to a shape that fits the guide surface 610. Therefore, there is no interference between the connection mechanism 200 and the guide surface 610, and the air intake adjustment part 100 can be moved to a position closer to the air inlet 500 as much as possible. The portion 211 close to the guide surface 610 can be set to, for example, a curved shape to adapt to the guide surface 610 that also has a curved shape.

[0039] The fan for a range hood of this embodiment can be applicable to all range hoods using centrifugal fans, and can also be other range hoods without obstructions in the direction of the air inlet.

[0040] The utility model can make the air intake volume of the fan in a correspondingly optimal state according to the change of the smoke exhaust resistance at the rear end of the range hood, thereby reducing noise and flow turbulence and improving the user experience.

[0041] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A fan for a range hood, comprising a volute and an air inlet, characterized in that: The fan for the range hood also includes a driving component, a connecting mechanism and an air intake regulating part. The air intake regulating part is suspended in the central area of ​​the air inlet through the connecting mechanism. The driving component drives the connecting mechanism to move one end of the air intake regulating part, and drives the air intake regulating part to move in a direction away from or close to the air inlet through the connecting mechanism.

2. The fan for a range hood according to claim 1, characterized in that: The projection area of ​​the air intake regulating portion on the plane where the air intake port is located is 0.1-0.4 times the area of ​​the air intake port.

3. The fan for a range hood according to claim 1, characterized in that: The connecting mechanism realizes movement of one end of the connecting mechanism connected to the air intake regulating portion by overall movement of the connecting mechanism itself, or realizes movement of one end of the connecting mechanism connected to the air intake regulating portion by deformation of the connecting mechanism itself.

4. The fan for a range hood according to claim 3, characterized in that: The connecting mechanism is a connecting rod mechanism including at least two connecting rods hinged together, the driving component is connected to one of the connecting rods, and the air intake regulating part is connected to another of the connecting rods.

5. The fan for a range hood according to claim 4, characterized in that: The number of the link mechanisms is at least two, and each of the link mechanisms is connected to at least two positions in the circumferential direction of the air intake regulating portion.

6. The fan for a range hood according to claim 5, characterized in that: The connecting rods of each connecting rod mechanism connected to the air intake regulating part are all hingedly connected to the air intake regulating part.

7. The fan for a range hood according to claim 1, characterized in that: The driving component is a motor, and the motor is fixedly connected to the volute.

8. The fan for a range hood according to any one of claims 1 to 7, characterized in that: The fan for the range hood further comprises an air inlet ring connected to the volute, wherein the air inlet ring is located at the periphery of the air inlet, and an upwardly raised guiding surface is formed on the inner ring side of the air inlet close to the air inlet.

9. The fan for a range hood according to claim 8, characterized in that: A portion of the connection mechanism close to the guide surface is configured to be in a shape that fits the guide surface.

10. A range hood, characterized in that: The range hood comprises the fan for the range hood as claimed in any one of claims 1 to 9.

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