A smoke machine

Abstract

The utility model discloses a range hood, comprising: a range hood main body, which is provided with an air collecting chamber and an air suction port connected to the air collecting chamber, a guide plate is provided in the air collecting chamber, the guide plate is provided on a back plate of the air collecting chamber, the guide plate has a first guide section; an air collecting box assembly, which is provided with a smoke collecting chamber, the smoke collecting chamber is connected to the air collecting chamber, and a smoke exhaust fan is provided in the smoke collecting chamber; when the smoke exhaust fan is started, the oil smoke entering the air collecting chamber through the air suction port is guided by the first guide section and directed to the air inlet of the smoke exhaust fan in the smoke collecting chamber Compared with the prior art, the range hood of the utility model is provided with a guide plate on the back plate of the air collecting chamber. After the external oil smoke enters the air collecting chamber through the air suction port, it collides with the guide plate when flowing to the back plate of the air collecting chamber, and is guided by the guide plate and flows to the air inlet of the smoke exhaust fan in the smoke collecting chamber. The guide plate prevents the airflow entering the air collecting chamber through the air suction port from directly impacting the back plate of the air collecting chamber, thereby reducing noise and guiding the airflow to flow to the air inlet of the smoke exhaust fan.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, and in particular to a range hood. Background Art

[0002] In the prior art, when the smoke exhaust fan of the range hood is started, when the external oil smoke enters the air collecting chamber through the air suction port, its flow direction is toward the back plate of the air collecting chamber. The airflow entering through the air suction port will directly collide with the back plate of the air collecting chamber, generating a large noise. After the airflow collides with the back plate, part of the airflow flows upward along the back plate, and part flows downward along the back plate, affecting the ability of the smoke exhaust fan to extract oil smoke. Utility Model Content

[0003] The purpose of the utility model is to provide a range hood, which is used to solve the above technical problems.

[0004] A range hood, comprising:

[0005] The range hood body has an air collecting cavity and an air suction port connected to the air collecting cavity, a guide plate is arranged in the air collecting cavity, the guide plate is arranged on the back plate of the air collecting cavity, and the guide plate has a first guide section;

[0006] The wind collecting box assembly comprises a smoke collecting cavity, the smoke collecting cavity is connected with the wind collecting cavity, and a smoke exhaust fan is arranged in the smoke collecting cavity;

[0007] When the smoke exhaust fan is started, the oil smoke entering the air collecting chamber through the air suction port is guided by the first guide section and flows toward the air inlet of the smoke exhaust fan in the smoke collecting chamber.

[0008] According to an embodiment of the present utility model, the guide surface of the first guide section is arranged to be tilted backward from bottom to top.

[0009] According to one embodiment of the utility model, the lower edge of the first guide section is lower than the height of the lower edge of the air suction port, and the upper edge of the first guide section extends to the back plate of the air collecting cavity.

[0010] According to one embodiment of the utility model, the guide plate also includes a second guide section and a connecting section, the connecting section connects the lower edge of the first guide section and the upper edge of the second guide section, the connecting section is an arc section, and the connecting section protrudes toward the side close to the air suction port.

[0011] According to one embodiment of the utility model, the guide surface of the second guide section is arranged to be inclined forward from top to bottom, and the lower edge of the second guide section extends backward to the back plate of the air collecting cavity.

[0012] According to an embodiment of the present utility model, the guide surface of the first guide section is an arc, and the guide surface of the second guide section is also an arc.

[0013] According to an embodiment of the present utility model, the first flow guiding section is an inclined section, and the second flow guiding section is also an inclined section.

[0014] According to an embodiment of the present utility model, an angle α between the first guide section and the horizontal plane satisfies: 30°≤α≤50°.

[0015] According to one embodiment of the utility model, the guide plate also includes a first connecting section and a second connecting section, the lower edge of the first connecting section is connected to the upper edge of the first guide section, the upper edge of the second connecting section is connected to the lower edge of the second guide section, and the first connecting section and the second connecting section are connected to the back plate of the air collecting chamber.

[0016] According to one embodiment of the utility model, the center line of the air suction port extends toward the back plate of the air collecting cavity and intersects with the back plate of the air collecting cavity, and the height of the upper edge of the first guide section is not lower than the height of the intersection of the extension line of the center line of the air suction port and the back plate of the air collecting cavity.

[0017] Compared with the prior art, the range hood of the present invention has the following advantages:

[0018] The range hood of the utility model is provided with a guide plate on the back plate of the air collecting chamber. After the external oil smoke enters the air collecting chamber through the air suction port, it collides with the guide plate when flowing toward the back plate of the air collecting chamber, and is guided by the guide plate and flows toward the air inlet of the smoke exhaust fan in the smoke collecting chamber. The guide plate prevents the airflow entering the air collecting chamber through the air suction port from directly impacting the back plate of the air collecting chamber, thereby reducing noise and guiding the airflow to flow toward the air inlet of the smoke exhaust fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the range hood of the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the middle guide plate;

[0021] Figure 3 is a cross-sectional view of a guide plate of a first embodiment;

[0022] Figure 4 is a cross-sectional view of a guide plate of a second embodiment;

[0023] Figure 5 is a schematic diagram of the flow of air in the air collecting cavity;

[0024] In the figure: 1. smoke machine body, 11. air collecting chamber, 12. air inlet, 2. air collecting box assembly, 21. smoke collecting chamber, 22. smoke exhaust fan, 3. guide plate, 31. first guide section, 32. second guide section, 33. connecting section, 34. first connecting section, 35. second connecting section

[0025] The realization of the functions and advantages of the utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0030] See also Figures 1 to 5The utility model discloses a range hood, which comprises a range hood body 1 and an air collecting box assembly 2. The range hood body 1 comprises an air collecting chamber 11 and an air suction port 12 connected to the air collecting chamber 11. A guide plate 3 is arranged in the air collecting chamber 11. The guide plate 3 is arranged on the back plate of the air collecting chamber 11. The guide plate 3 has a first guide section 31. The air collecting box assembly 2 comprises a smoke collecting chamber 21, which is connected to the air collecting chamber 11. A smoke exhaust fan 22 is arranged in the smoke collecting chamber 21. When the smoke exhaust fan 22 is started, the oil smoke entering the air collecting chamber 11 through the air suction port 12 is guided by the first guide section 31 and flows toward the air inlet of the smoke exhaust fan 22 in the smoke collecting chamber 21. When the range hood of the utility model is started, the smoke exhaust fan 22 starts running, and the smoke exhaust fan 22 sucks the air in the smoke collecting chamber 21 and discharges the air out of the smoke collecting chamber 21, forming a negative pressure in the smoke collecting chamber 21. The negative pressure in the smoke collecting chamber 21 causes the air in the air collecting chamber 11 to flow into the smoke collecting chamber 21, and a negative pressure is also formed in the air collecting chamber 11, and a negative pressure is formed at the air suction port 12. The oil smoke generated by the user's cooking flows into the air collecting chamber 11 through the air suction port 12, and flows into the smoke collecting chamber 21 through the air collecting chamber 11, and is finally discharged from the smoke collecting chamber 21 by the smoke exhaust fan 22. In a common range hood, an air intake port 12 is arranged on the front panel of the range hood body 1, and the air intake port 12 faces the back panel of the air collecting chamber 11. When the oil smoke outside the air collecting chamber 11 enters the air collecting chamber 11 through the air intake port 12 under the action of the negative pressure at the air intake port 12, it will rush toward the back panel of the air collecting chamber 11 under the action of inertia, and after colliding with the back panel of the air collecting chamber 11, it will generate noise, and a part of it will flow downward along the back panel of the air collecting chamber 11, affecting the suction speed of the smoke exhaust fan 22 for the external oil smoke, and affecting the purification effect of the range hood. The range hood of the present invention is provided with a guide plate 3 on the back plate of the air collecting chamber 11. After the external oil smoke enters the air collecting chamber 11 through the air suction port 12, it collides with the guide plate 3 when flowing toward the back plate of the air collecting chamber 11, and is guided by the guide plate 3 and flows toward the air inlet of the smoke exhaust fan 22 in the smoke collecting chamber 21. The guide plate 3 prevents the airflow entering the air collecting chamber 11 through the air suction port 12 from directly impacting the back plate of the air collecting chamber 11, thereby reducing noise and guiding most of the airflow to flow toward the air inlet of the smoke exhaust fan 22.

[0031] See also Figure 1 In the range hood of the present invention, the guide surface of the first guide section 31 is arranged to be tilted backward from bottom to top. When the smoke exhaust fan 22 is running, the oil smoke enters the air collecting chamber 11 through the air suction port 12. The flow velocity of the oil smoke when passing through the air suction port 12 is toward the back plate of the air collecting chamber 11. After entering the air collecting chamber 11, since the smoke exhaust fan 22 is arranged above the air collecting chamber 11, the air inlet of the smoke exhaust fan 22 faces the back plate of the smoke collecting chamber 21. After the oil smoke entering the air collecting chamber 11 hits the first guide section 31 of the guide plate 3 on the back plate of the air collecting chamber 11, it is guided upward by the first guide section 31, so that most of the oil smoke can flow upward backward in the air collecting chamber 11, quickly enter the smoke collecting chamber 21, and be discharged from the smoke collecting chamber 21 by the smoke exhaust fan 22.

[0032] See also Figure 1 In the range hood of the present invention, the lower edge of the first guide section 31 is lower than the lower edge height of the air inlet 12, and the upper edge of the first guide section 31 extends to the back plate of the air collecting chamber 11. When the smoke exhaust fan 22 is running, the oil smoke enters the air collecting chamber 11 through the air inlet 12, and the flow velocity of the oil smoke when passing through the air inlet 12 is toward the back plate of the air collecting chamber 11. The lower edge of the first guide section 31 is lower than the lower edge height of the air inlet 12, which means that the projection of the first guide section 31 to the front plate of the air collecting chamber 11 covers the air inlet 12. After the oil smoke rushes out of the air inlet 12 and enters the air collecting chamber 11, it can be completely guided by the first guide section 31 and flows toward the air inlet of the smoke exhaust fan 22 in the smoke collecting chamber 21, and can be quickly discharged by the smoke exhaust fan 22.

[0033] It is easy to know that when the smoke exhaust fan 22 is started, a negative pressure is formed in the air collecting chamber 11, and the bottom part of the air collecting chamber 11 is also under negative pressure. When the external oil smoke enters the air collecting chamber 11 through the air suction port 12, its flow direction is toward the back plate of the air collecting chamber 11. If there is no guidance of the first guide section 31, the airflow entering through the air suction port 12 will directly collide with the back plate of the air collecting chamber 11. After the airflow collides with the back plate, the airflow flows upward along the back plate, and a part of the airflow will flow into the air collecting chamber 11. Under the action of negative pressure, the air is deflected downward from the air suction port 12 and flows toward the bottom of the air collecting chamber 11; affecting the ability of the smoke exhaust fan 22 to suck oil smoke; a first guide section 31 is provided which is tilted backward from bottom to top. After the airflow entering the air collecting chamber 11 through the air suction port 12 collides with the first guide section 31, most of the airflow will be guided upward by the first guide section 31, and the part of the airflow entering from the air suction port 12 that flows downward is relatively small, which can increase the exhaust speed of the smoke exhaust fan 22 for oil smoke.

[0034] See also Figure 1 and Figure 2In the range hood of the present invention, the guide plate 3 also includes a second guide section 32 and a connecting section 33. The connecting section 33 connects the lower edge of the first guide section 31 and the upper edge of the second guide section 32. The connecting section 33 is an arc section, and the connecting section 33 protrudes toward the side close to the air inlet 12. When the smoke exhaust fan 22 is running, the oil smoke enters the air collecting chamber 11 through the air suction port 12. After the oil smoke hits the first guide section 31 of the guide plate 3, most of the oil smoke moves upward along the first guide section 31 and flows toward the air inlet of the smoke exhaust fan 2 in the smoke collecting chamber 21. Another part of the airflow will be deflected downward from the air suction port 12 under the action of the negative pressure in the air collecting chamber 11 and flow toward the bottom of the air collecting chamber 11, and then move downward along the second guide section 32. This part of the airflow is guided by the second guide section 32 and moves along the second guide section 32 to below the air suction port 12, and then flows upward under the action of the negative pressure in the air collecting chamber 11, thereby increasing the exhaust speed of the smoke from the smoke exhaust fan 2, and a connecting section 33 is arranged between the first guide section 31 and the second guide section 32. The connecting section 33 is an arc section to prevent the airflow at the air suction port 12 from hitting a sharp surface and generating a loud noise.

[0035] See also Figure 1 In the range hood of the present invention, the guide surface of the second guide section 32 is tilted forward from top to bottom, and the lower edge of the second guide section 32 extends backward to the back plate of the air collecting chamber 11. The airflow that deviates downward from the air inlet 12 and flows toward the bottom of the air collecting chamber 11 is guided by the connecting section 33 and flows along the second guide section 32. The second guide section 32 is tilted backward from top to bottom, and can guide the airflow to the back plate of the air collecting chamber 11, so that this part of the airflow flows downward along the back plate of the air collecting chamber 11. The farther this part of the airflow is from the air inlet 12, the smaller the impact on the airflow entering the air inlet 12.

[0036] See also Figure 3 In some embodiments, the guide surface of the first guide section 31 is an arc, and the guide surface of the second guide section 32 is also an arc. After the airflow entering the air collecting chamber 11 through the air inlet 12 hits the first guide section 31, it flows upward along the first guide section 31. The airflow that deviates downward from the air inlet 12 and flows toward the bottom of the air collecting chamber 11 flows to the second guide section 32 through the connecting section 33, and flows downward along the second guide section 32. The first guide section 31 and the second guide section 32 are set as arc surfaces, which can make the airflow flow smoothly along them and guide the airflow to a longer distance toward the back plate of the air collecting chamber 11.

[0037] See also Figure 4In other embodiments, the first guide section 31 is an inclined section, and the second guide section 32 is also an inclined section. The first guide section 31 and the second guide section 32 have different shapes. As long as they guide the airflow in the same way, they can prevent the airflow entering the air collecting chamber 11 through the air suction port 12 from directly impacting the back plate of the air collecting chamber 11, and guide the airflow to flow toward the air inlet side of the smoke exhaust fan 22 in the smoke collecting chamber 21, and at the same time guide the airflow that is deflected downward from the air suction port 12 and flows toward the bottom of the air collecting chamber 11 downward.

[0038] In the range hood of the present utility model, the angle α between the first guide section 31 and the horizontal plane satisfies: 30°≤α≤50°. The function of the first guide section 31 is to make the airflow entering the air collecting chamber 11 through the air suction port 12 move upward smoothly along the first guide section 31, so that the angle α between the first guide section 31 and the horizontal plane satisfies: 30°≤α≤50°, which can guide the airflow upward without making the gap between the first guide section 31 and the air suction port 12 too small, causing too much wind resistance to the airflow entering the air collecting chamber 11.

[0039] See also Figure 2 In the range hood of the present invention, the guide plate 3 further includes a first connecting section 34 and a second connecting section 35. The lower edge of the first connecting section 34 is connected to the upper edge of the first guide section 31, the upper edge of the second connecting section 35 is connected to the lower edge of the second guide section 32, and the first connecting section 34 and the second connecting section 35 are connected to the back plate of the air collecting chamber 11. After the first connecting section 34 and the second connecting section 35 are connected to the back plate of the air collecting chamber 11 by screws, the first connecting section 34 and the second connecting section 35 can play a role in strengthening the back plate of the air collecting chamber 11 and reducing vibration noise.

[0040] In the range hood of the present invention, the center line of the air inlet 12 extends toward the back plate of the air collecting chamber 11 and intersects with the back plate of the air collecting chamber 11, and the height of the upper edge of the first guide section 31 is not lower than the height of the intersection of the extension line of the center line of the air inlet 12 and the back plate of the air collecting chamber 11. After the oil smoke enters the air collecting chamber 11 through the air inlet 12, the area where the oil smoke contacts the first guide section 31 is large enough, so that the first guide section 31 can better guide the oil smoke.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A range hood, characterized in that: include: A range hood body (1) comprising an air collecting chamber (11) and an air inlet (12) connected to the air collecting chamber (11); a guide plate (3) is provided in the air collecting chamber (11); the guide plate (3) is provided on a back plate of the air collecting chamber (11); and the guide plate (3) has a first guide section (31); An air collecting box assembly (2) comprising a smoke collecting chamber (21), wherein the smoke collecting chamber (21) is in communication with the air collecting chamber (11), and a smoke exhaust fan (22) is provided in the smoke collecting chamber (21); When the smoke exhaust fan (22) is started, the oil smoke entering the air collecting chamber (11) through the air intake port (12) is guided by the first guide section (31) and flows toward the air inlet of the smoke exhaust fan (22) in the smoke collecting chamber (21).

2. The range hood according to claim 1, characterized in that: The guide surface of the first guide section (31) is arranged to be inclined backward from bottom to top.

3. The range hood according to claim 1, characterized in that: The lower edge of the first guide section (31) is lower than the lower edge height of the air suction port (12), and the upper edge of the first guide section (31) extends to the back plate of the air collecting chamber (11).

4. The range hood according to claim 1, characterized in that: The guide plate (3) further comprises a second guide section (32) and a connecting section (33), wherein the connecting section (33) connects the lower edge of the first guide section (31) and the upper edge of the second guide section (32), and the connecting section (33) is an arc section, and the connecting section (33) protrudes toward a side close to the air inlet (12).

5. The range hood according to claim 4, characterized in that: The guide surface of the second guide section (32) is arranged to be inclined forward from top to bottom, and the lower edge of the second guide section (32) extends backward to the back plate of the air collecting chamber (11).

6. The range hood according to claim 4, characterized in that: The guide surface of the first guide section (31) is an arc, and the guide surface of the second guide section (32) is also an arc.

7. The range hood according to claim 4, characterized in that: The first flow guiding section (31) is an inclined section, and the second flow guiding section (32) is also an inclined section.

8. The range hood according to claim 4, characterized in that: The included angle α between the first guide section (31) and the horizontal plane satisfies: 30°≤α≤50°.

9. The range hood according to claim 4, characterized in that: The guide plate (3) further comprises a first connecting section (34) and a second connecting section (35); the lower edge of the first connecting section (34) is connected to the upper edge of the first guide section (31); the upper edge of the second connecting section (35) is connected to the lower edge of the second guide section (32); the first connecting section (34) and the second connecting section (35) are connected to the back plate of the air collecting chamber (11).

10. The range hood according to claim 1, characterized in that: The center line of the air suction port (12) extends toward the back plate of the air collecting chamber (11) and intersects with the back plate of the air collecting chamber (11), and the height of the upper edge of the first guide section (31) is not lower than the height of the intersection of the extension line of the center line of the air suction port (12) and the back plate of the air collecting chamber (11).

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