CN220379798U - Exhaust device and range hood - Google Patents

Abstract

The utility model belongs to the technical field of kitchen electricity, and discloses an exhaust device and a range hood. The exhaust device comprises an exhaust pipeline and a rectifying net, one end of the exhaust pipeline is an air inlet, the other end of the exhaust pipeline is an air outlet, and air flow enters the exhaust pipeline from the air inlet and is discharged from the air outlet. The rectifying net is arranged at the air inlet in the exhaust pipeline, and can rotate relative to the exhaust pipeline so as to adjust the included angle between the net surface of the rectifying net and the cross section of the exhaust pipeline. Through setting up the rectification net to can rotate for the exhaust pipeline relatively, adjust the contained angle between the cross section of the net face of rectification net and exhaust pipeline. According to the air flow condition in the working process, the rectifying net is rotated, so that the net surface of the rectifying net and the air flow direction are kept in a vertical state as far as possible, the air flow vertically passes through the meshes of the rectifying net, and the flow loss of the air flow is reduced.

Description

Exhaust device and range hood

Technical Field

The utility model relates to the technical field of kitchen electricity, in particular to an exhaust device and a range hood.

Background

The kitchen ventilator is a kitchen appliance for purifying kitchen environment, and can quickly pump away waste gas generated by combustion of a kitchen range and oil smoke generated in a cooking process and discharge the waste gas and the oil smoke outdoors so as to achieve the aim of purifying the kitchen environment.

The range hood generally comprises a smoke collecting system, an exhaust device and an exhaust device, wherein the exhaust device is communicated with the smoke collecting system and the exhaust device, the exhaust device provides power, and the oil smoke is sucked into the exhaust device through the smoke collecting system. The exhaust device comprises an exhaust pipeline and a rectifying net, wherein the rectifying net is arranged at one end of an air inlet of the exhaust pipeline, plays a role in carding and rectifying air flow entering the exhaust pipeline, and reduces turbulence and vortex of the air flow in the pipeline.

However, the current rectifying net is fixedly arranged in the exhaust pipeline, the angle cannot be adjusted according to the requirement, and when the airflow flow changes, the angle between the airflow flowing direction and the rectifying net changes, so that the loss of airflow flowing is possibly overlarge.

Therefore, an exhaust device and a range hood are needed to solve the above problems.

Disclosure of Invention

The utility model aims to provide an exhaust device and a range hood, which can adjust the setting angle of a rectifying net according to the change of airflow flow, and are beneficial to reducing the flow loss of airflow.

To achieve the purpose, the utility model adopts the following technical scheme:

an exhaust device, comprising:

one end of the air exhaust pipeline is an air inlet, the other end of the air exhaust pipeline is an air outlet, and air flow enters the air exhaust pipeline from the air inlet and is discharged from the air outlet;

the rectifying net is arranged at the air inlet in the exhaust pipeline and can rotate relative to the exhaust pipeline so as to adjust the included angle between the net surface of the rectifying net and the cross section of the exhaust pipeline.

As an alternative, at least one end of the rectifying net is provided with a rotating shaft, the rotating shaft is rotationally connected to the pipe wall of the exhaust pipeline, and the rotating shaft can drive the rectifying net to rotate.

As an alternative scheme, the rotating shaft stretches out to the outside of the exhaust pipeline, the exhaust device further comprises a knob, the knob is sleeved at one end of the rotating shaft, stretching out of the outside of the exhaust pipeline, and the rotating knob can drive the rotating shaft to synchronously rotate.

As an alternative, one of the exhaust pipeline and the rectifying net is provided with a sliding rail, and the other one of the exhaust pipeline and the rectifying net is provided with a sliding block, so that the sliding block can slide along the sliding rail when the rectifying net rotates.

As an alternative scheme, the rectifying net comprises a first oil net, a second oil net and a third oil net which are pivoted in sequence, the second oil net is rotationally connected to the pipe wall of the exhaust pipeline, and one sides, far away from the second oil net, of the first oil net and the third oil net are elastically connected to the inner wall of the exhaust pipeline.

Alternatively, the first oil net and the third oil net are connected to the inner wall of the exhaust pipeline through elastic pieces.

Alternatively, the width of the second oil screen is greater than the width of the first oil screen and the width of the second oil screen is greater than the width of the third oil screen in a direction perpendicular to the axis of rotation of the rectifying screen.

Alternatively, the rotational axis of the rectifying net is perpendicular to the flow direction of the air flow in the exhaust duct.

Alternatively, the included angle between the cross section of the rectifying net and the cross section of the exhaust pipeline is in the range of 0-25 degrees.

The range hood comprises a smoke collecting system and an exhaust device, and further comprises the exhaust device, wherein the exhaust device is communicated with the smoke collecting system and the exhaust device.

The beneficial effects are that:

according to the exhaust device provided by the utility model, the rectifying net is arranged to rotate relative to the exhaust pipeline, so that the included angle between the net surface of the rectifying net and the cross section of the exhaust pipeline is adjusted. According to the air flow condition in the working process, the rectifying net is rotated, so that the net surface of the rectifying net and the air flow direction are kept in a vertical state as far as possible, the air flow vertically passes through the meshes of the rectifying net, and the flow loss of the air flow is reduced.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of a range hood according to an embodiment of the present utility model;

fig. 2 is a schematic airflow direction diagram of the range hood provided by the embodiment of the utility model when the airflow rate is larger;

fig. 3 is a schematic airflow direction diagram of the range hood provided by the embodiment of the utility model in a medium airflow flow;

fig. 4 is a schematic airflow direction diagram of the range hood provided by the embodiment of the utility model when the airflow rate is smaller;

fig. 5 is a schematic structural diagram of a rectifying net according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a matching structure of a knob and a rotating shaft according to an embodiment of the present utility model;

fig. 7 is an enlarged structural view at B in fig. 5.

In the figure:

100. an exhaust device; 200. a smoke collecting system; 210. a smoke collecting port; 300. an air draft device;

1. an exhaust pipeline; 11. an air inlet; 12. an air outlet;

2. a rectifying net; 21. a first oil screen; 22. a second oil screen; 23. a third oil screen;

3. a rotating shaft; 31. an external gear;

4. a knob; 41. an internal gear;

5. a slide rail;

6. a slide block;

7. an elastic member;

8. and a pivot shaft.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1, the present embodiment provides an exhaust device 100 and a range hood including the exhaust device 100, the exhaust device 100 includes an exhaust pipe 1, one end of the exhaust pipe 1 is an air inlet 11, the other end of the exhaust pipe 1 is an air outlet 12, and air flow enters the exhaust pipe 1 from the air inlet 11 and is exhausted from the air outlet 12. The range hood further comprises a smoke collecting system 200 and an air exhausting device 300, the air exhausting device 100 is communicated with the smoke collecting system 200 and the air exhausting device 300, the smoke collecting system 200 is connected to one end of an air inlet 11 of the air exhausting device 100, and the air exhausting device 300 is connected to one end of an air outlet 12 of the air exhausting device 100.

As shown in fig. 1, for the overhead range hood, the smoke collecting port 210 of the smoke collecting system 200 is obliquely arranged at the front side, and the sucked smoke flow enters the smoke collecting system 200 from the smoke collecting port 210 and turns to enter the exhaust pipeline 1, so that turbulence and vortex are easily formed at the turning point of the airflow, and great noise is caused.

In the prior art, a rectifying net is arranged at the air inlet of the exhaust pipeline, and turbulent air flow is combed through the rectifying net, so that turbulence and vortex of the air flow in the exhaust pipeline are reduced, and air flow noise is reduced. However, the angle of the rectifying net in the prior art cannot be adjusted according to the requirement, and when the airflow rate changes, the angle between the airflow direction and the rectifying net changes, which may cause overlarge loss of airflow.

For this reason, as shown in fig. 1 and 2, the arrangement of the rectifying network 2 is improved in the present embodiment. Specifically, the rectifying net 2 is arranged at the air inlet 11 in the air exhaust pipeline 1, the rectifying net 2 can rotate relative to the air exhaust pipeline 1 to adjust the included angle alpha between the net surface of the rectifying net 2 and the cross section of the air exhaust pipeline 1, and the rectifying net 2 is rotated according to the air flow condition in the working process, so that the net surface of the rectifying net 2 and the air flow direction are kept in a vertical state as far as possible, the air flow vertically passes through the meshes of the rectifying net 2, and the flow loss of the air flow is reduced.

Specifically, with reference to fig. 1 and 2, the rotation axis of the rectifying net 2 is perpendicular to the airflow direction in the exhaust duct 1, and the airflow flows from the front side of the smoke collecting port 210 of the smoke collecting system 200 from front to back and forms an upward flow trend under the suction of the air extraction device 300. The rotation axis of the rectifying net 2 is extended in the left-right direction so that the rectifying net 2 can be rotated back and forth, thereby enabling to achieve a posture perpendicular to the flow direction of the air flow.

As shown in fig. 1 to 4, the smoke collecting port 210 of the smoke collecting system 200 is disposed obliquely to the front side, and the inclination of the rectifying net 2 means an attitude of downward inclination from front to back. Fig. 2 shows a schematic airflow direction when the airflow rate is high, fig. 3 shows a schematic airflow direction when the airflow rate is medium, fig. 4 shows a schematic airflow direction when the airflow rate is low, and fig. 1-4 show that when the airflow enters the exhaust duct 1 from the smoke collecting system 200, the greater the airflow rate, the closer the airflow is to the rear walls of the smoke collecting system 200 and the exhaust duct 1, and the greater the angle of the included angle α. When the flow rate of the air flow is small, the air flow is regulated to be approximately parallel to the cross section of the exhaust pipeline 1 when entering the exhaust pipeline 1, and the included angle alpha is regulated to be approximately 0 degrees. Specifically, the included angle α between the cross section of the rectifying net 2 and the exhaust pipe 1 ranges from 0 ° to 25 °. Under the condition of large airflow, the adjusting range of the included angle alpha is 15-25 degrees; under the condition of small airflow, the adjusting range of the included angle alpha is 0-8 degrees; and under the medium airflow flow, the included angle alpha is adjusted to be 8-15 degrees.

Optionally, as shown in fig. 1 and 5, at least one end of the rectifying net 2 is provided with a rotating shaft 3, the rotating shaft 3 is rotatably connected to the pipe wall of the exhaust pipe 1, and the rotating shaft 3 can drive the rectifying net 2 to rotate. In this embodiment, the rotating shafts 3 are disposed at the left end and the right end of the rectifying net 2, so as to ensure that the rectifying net 2 rotates stably.

As shown in fig. 1, 5 and 6, in order to facilitate the rotation of the rotating shaft 3, the rotating shaft 3 extends to the outside of the exhaust pipeline 1, the exhaust device 100 further includes a knob 4, the knob 4 is sleeved at one end of the rotating shaft 3 extending to the outside of the exhaust pipeline 1, and the rotating knob 4 can drive the rotating shaft 3 to rotate synchronously. The knob 4 can be arranged on the rotating shaft 3 at the left end or the right end of the rectifying net 2, so that the rectifying net 2 can be driven to rotate.

Specifically, as shown in fig. 6, the knob 4 is provided with an internal gear 41, the rotating shaft 3 is correspondingly provided with an external gear 31, and the internal gear 41 and the external gear 31 are meshed, so that the rotating shaft 3 can be driven to synchronously rotate when the knob 4 rotates.

As shown in fig. 7, in order to stably rotate the rectifying net 2, one of the exhaust pipeline 1 and the rectifying net 2 is provided with a sliding rail 5, and the other one of the exhaust pipeline 1 and the rectifying net 2 is provided with a sliding block 6, when the rectifying net 2 rotates, the sliding block 6 can slide along the sliding rail 5, and the sliding rail 5 and the sliding block 6 cooperate to play a guiding role in the rotation of the rectifying net 2, so that the rotating stability of the rectifying net 2 is improved. In this embodiment, the sliding rail 5 is disposed on the inner wall of the exhaust pipeline 1, and the sliding block 6 is disposed on the rectifying net 2. Wherein, the sliding block 6 and the sliding rail 5 are correspondingly provided with two groups to provide guiding function for the rectifying net 2 at two sides of the rotating shaft 3.

Preferably, the sliding blocks 6 and the sliding rails 5 are arranged at the left end and the right end of the rectifying net 2 to guide, so that better guiding effect can be provided for the rotation of the rectifying net 2.

Optionally, as shown in fig. 7, the rectifying net 2 includes a first oil net 21, a second oil net 22 and a third oil net 23 pivoted in turn, where the second oil net 22 is rotatably connected to a pipe wall of the exhaust pipeline 1, sides of the first oil net 21 and the third oil net 23 far away from the second oil net 22 are elastically connected to an inner wall of the exhaust pipeline 1, and when the second oil net 22 rotates, the first oil net 21 and the third oil net 23 can be driven to rotate along with the second oil net, and since the first oil net 21 and the third oil net 23 are elastically connected to the inner wall of the exhaust pipeline 1, the rectifying net 2 formed by the first oil net 21, the second oil net 22 and the third oil net 23 forms an arc-shaped net surface to provide better rectifying and noise reducing effects.

Optionally, as shown in fig. 7, the first oil screen 21 and the second oil screen 22 are connected through a pivot shaft 8, and the pivot shaft 8 extends outwards from the first oil screen 21 and the second oil screen 22 to form the sliding block 6; similarly, the pivot shaft 8 between the third oil net 23 and the second oil net 2 also extends outwards to form the sliding block 6, so that the sliding block 6 does not need to be additionally processed on the rectifying net 2, and the processing is more convenient.

Specifically, as shown in fig. 1 and 7, the first oil net 21 and the third oil net 23 are each connected to the inner wall of the exhaust duct 1 through an elastic member 7. The elastic element 7 can be a spring, which is connected with the rectifying net 2 and the exhaust pipeline 1 in a welding manner.

In this embodiment, as shown in fig. 1 and 5, the first oil net 21 is connected to the exhaust pipe 1 through three elastic members 7, and the third oil net 23 is also connected to the exhaust pipe 1 through three elastic members 7, and of course, more or less than three elastic members 7 are also provided according to the width dimension of the exhaust pipe 1, and the number of the elastic members 7 is not limited here.

Alternatively, as shown in fig. 5 and 6, the width of the second oil screen 22 is larger than the width of the first oil screen 21, and the width of the second oil screen 22 is larger than the width of the third oil screen 23 in a direction perpendicular to the rotation axis of the rectifying screen 2. The knob 4 drives the second oil net 22 to rotate, so that the rotation angle of the second oil net 22 can be controlled more accurately, the width of the second oil net 22 is larger, and the integral rotation angle of the rectifying net 2 can be controlled better. The first oil net 21 and the third oil net 23 are smaller in width, play a role in transitional connection, and solve the problem that the elastic piece 7 is directly connected with the second oil net 22 and is large in tensile deformation.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. An exhaust device, comprising:

the air exhaust device comprises an air exhaust pipeline (1), wherein one end of the air exhaust pipeline (1) is an air inlet (11), the other end of the air exhaust pipeline (1) is an air outlet (12), and air flow enters the air exhaust pipeline (1) from the air inlet (11) and is exhausted from the air outlet (12);

the rectifying net (2) is arranged at the air inlet (11) in the air exhaust pipeline (1), and the rectifying net (2) can rotate relative to the air exhaust pipeline (1) so as to adjust the included angle between the net surface of the rectifying net (2) and the cross section of the air exhaust pipeline (1).

2. The exhaust device according to claim 1, characterized in that at least one end of the rectifying net (2) is provided with a rotating shaft (3), the rotating shaft (3) is rotatably connected to the pipe wall of the exhaust pipeline (1), and rotating the rotating shaft (3) can drive the rectifying net (2) to rotate.

3. The exhaust device according to claim 2, wherein the rotating shaft (3) extends to the outer side of the exhaust pipeline (1), the exhaust device further comprises a knob (4), the knob (4) is sleeved at one end of the rotating shaft (3) extending to the outer side of the exhaust pipeline (1), and the rotating of the knob (4) can drive the rotating shaft (3) to synchronously rotate.

4. The exhaust device according to claim 1, characterized in that one of the exhaust line (1) and the rectifying net (2) is provided with a sliding rail (5), the other one of the two is provided with a sliding block (6), and the sliding block (6) can slide along the sliding rail (5) when the rectifying net (2) rotates.

5. The exhaust device according to any one of claims 1 to 4, characterized in that the rectifying net (2) comprises a first oil net (21), a second oil net (22) and a third oil net (23) which are pivoted in sequence, the second oil net (22) is rotatably connected to the pipe wall of the exhaust pipeline (1), and one side, far away from the second oil net (22), of the first oil net (21) and one side, far away from the third oil net (23), of the second oil net (22) are elastically connected to the inner wall of the exhaust pipeline (1).

6. The exhaust device according to claim 5, characterized in that the first oil screen (21) and the third oil screen (23) are both connected to the inner wall of the exhaust line (1) by means of elastic elements (7).

7. The exhaust device according to claim 5, characterized in that the width of the second oil screen (22) is greater than the width of the first oil screen (21) and the width of the second oil screen (22) is greater than the width of the third oil screen (23) in a direction perpendicular to the rotational axis of the rectifying screen (2).

8. The exhaust device according to any one of claims 1 to 4, characterized in that the rotational axis of the rectifying net (2) is perpendicular to the flow direction of the air flow in the exhaust line (1).

9. The exhaust device according to any one of claims 1-4, characterized in that the angle between the cross section of the rectifying net (2) and the exhaust line (1) is in the range of 0-25 °.

10. A range hood comprising a smoke collecting system (200) and an exhaust device (300), characterized in that it further comprises an exhaust device according to any one of claims 1 to 9, said exhaust device communicating said smoke collecting system (200) with said exhaust device (300).