A smoke machine
By designing the flow guide assembly in the hood and using the inclined flow guide plate and sound absorbing cotton, the existing hood has solved the problems of high noise and poor suction capacity when starting, and achieved lower noise and more efficient fume suction.
Patent Information
- Application Number
- CN202421496333.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-27
AI Technical Summary
When the smoke exhaust fan is started, the external oil smoke enters the air collecting chamber and directly hits the back plate, causing large noise and affecting the suction ability of the smoke exhaust fan.
A hood is designed, and a flow guide assembly is adopted, including a flow guide plate and a sound absorbing cotton. The flow guide plate is composed of a first flow guide section and a second flow guide section. The flow guide surface of the first flow guide section is tilted backward from bottom to top, and the flow guide surface of the second flow guide section is tilted forward from top to bottom. The flow guide plate guides the oil smoke to flow to the air inlet of the smoke exhaust fan in the smoke collection cavity, and reduces noise through the sound absorbing cotton.
It effectively reduces the noise when the hood starts, improves the suction capacity of the smoke exhaust fan, and provides a more comfortable cooking environment.
Smart Images
Figure CN222703379U_ABST
Abstract
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. When the downward-flowing airflow flows back, it will disturb the airflow at the air suction port, 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 comprises a back plate, a front plate and an air collecting cavity located therebetween, and an air inlet connected to the air collecting cavity is provided on the front plate;
[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] A flow guide assembly, comprising a flow guide plate and sound absorbing cotton, wherein the flow guide plate is connected to the back plate, the flow guide plate has a first flow guide section, and sound absorbing cotton is arranged between the flow guide plate and the back plate;
[0008] 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.
[0009] 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.
[0010] 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 range hood body.
[0011] 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.
[0012] According to an 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 range hood body.
[0013] According to an embodiment of the present invention, micro-perforations are evenly distributed on the second flow guide section.
[0014] 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.
[0015] 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.
[0016] 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°.
[0017] According to one embodiment of the utility model, the center line of the air suction port extends toward the back plate of the range hood body and intersects with the back plate of the range hood body, 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 range hood body.
[0018] Compared with the prior art, the range hood of the present invention has the following advantages:
[0019] The range hood of the present invention is provided with a guide assembly on the back plate of the range hood main body. After the external oil smoke enters the air collecting chamber through the air suction port 1, it collides with the guide plate of the guide assembly when flowing toward the back plate of the range hood main body, and is guided by the guide plate to flow 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 range hood main body, thereby reducing noise and guiding most of the airflow to flow toward the air inlet of the smoke exhaust fan; and sound-absorbing cotton is arranged between the guide plate and the back plate. The vibration noise generated by colliding with the guide plate will be blocked by the sound-absorbing cotton and cannot be transmitted to the outside of the air collecting chamber. The noise heard by the user is relatively small, thereby providing the user with a comfortable cooking environment and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a cross-sectional view of the range hood of the utility model;
[0021] Figure 2 for Figure 1 A schematic diagram of the structure of the middle guide plate;
[0022] Figure 3 is a cross-sectional view of a guide plate of a first embodiment;
[0023] Figure 4 is a cross-sectional view of a guide plate of a second embodiment;
[0024] Figure 5 is a schematic diagram of the flow of air in the air collecting cavity;
[0025] In the figure: 1. Range hood body, 11. Back plate, 12. Front plate, 121. Air inlet, 13. Air collecting chamber, 2. Air collecting box assembly, 21. Smoke collecting chamber, 22. Smoke exhaust fan, 3. Guide assembly, 31. Guide plate, 311. First guide section, 312. Second guide section, 313. Connecting section, 314. First connecting section, 315. Second connecting section, 32. Sound-absorbing cotton
[0026] 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
[0027] 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.
[0028] 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.
[0029] 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.
[0030] 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:
[0031] See also Figures 1 to 5The utility model discloses a range hood, which comprises a range hood body 1, an air collecting box assembly 2 and a guide assembly 3. The range hood body 1 comprises a back plate 11, a front plate 12 and an air collecting chamber 13 located therebetween. The front plate 12 is provided with an air suction port 121 connected to the air collecting chamber 13. The air collecting box assembly 2 comprises a smoke collecting chamber 21, which is connected to the air collecting chamber 13. A smoke exhaust fan 22 is arranged in the smoke collecting chamber 21. The guide assembly 3 comprises a guide plate 31 and sound-absorbing cotton 32. The guide plate 31 is connected to the back plate 11. The guide plate 31 has a first guide section 3111. Sound-absorbing cotton 32 is arranged between the guide plate 31 and the back plate 11. When the smoke exhaust fan 22 is started, the oil smoke entering the air collecting chamber 13 through the air suction port 121 is guided by the first guide section 311 and flows to the air inlet of the smoke exhaust fan 22 in the smoke collecting chamber 21. When the range hood of the present invention 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 13 to flow into the smoke collecting chamber 21, and a negative pressure is also formed in the air collecting chamber 13, and a negative pressure is formed at the air suction port 121. The oil smoke generated by the user's cooking flows into the air collecting chamber 13 through the air suction port 121, and flows into the smoke collecting chamber 21 through the air collecting chamber 13, and is finally discharged out of the smoke collecting chamber 21 by the smoke exhaust fan 22. In a common range hood, an air intake port 121 is provided on the front panel 12 of the range hood body 1, and the air intake port 121 faces the back panel 11 of the range hood body 1. When the oil smoke outside the air collecting chamber 13 enters the air collecting chamber 13 through the air intake port 121 under the action of the negative pressure at the air intake port 121, it will rush toward the back panel 11 of the range hood body 1 under the action of inertia, and after colliding with the back panel 11 of the range hood body 1, it will generate noise, and a part of it will flow downward along the back panel 11 of the range hood body 1, affecting the suction speed of the smoke exhaust fan 22 for the external oil smoke, and affecting the purification effect of the range hood. In the range hood of the utility model, a guide assembly 3 is arranged on the back plate 11 of the range hood body 1. After the external oil smoke enters the air collection chamber 13 through the air suction port 121, when flowing toward the back plate 11 of the range hood body 1, it hits the guide plate 31 of the guide assembly 3, is guided by the guide plate 31 and flows toward the air inlet of the exhaust fan 22 in the smoke collection chamber 21. The guide plate 31 prevents the airflow entering the air collection chamber 13 through the air suction port 121 from directly hitting the back plate 11 of the range hood body 1, reduces noise, and guides most of the airflow to flow toward the air inlet of the exhaust fan 22. In addition, a sound-absorbing cotton 32 is arranged between the guide plate 31 and the back plate 11. The vibration noise generated by hitting the guide plate 31 will be blocked by the sound-absorbing cotton 32 and cannot be transmitted outside the air collection chamber 13. The noise heard by the user is relatively small, which can provide a comfortable cooking environment for the user and improve the user experience.
[0032] See also Figure 1In the range hood of the present invention, the guide surface of the first guide section 311 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 13 through the air suction port 121. The flow velocity of the oil smoke when passing through the air suction port 121 is toward the back plate 11 of the range hood body 1. After entering the air collecting chamber 13, since the smoke exhaust fan 22 is arranged above the air collecting chamber 13, 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 13 hits the first guide section 311 of the guide plate 31 on the back plate 11 of the range hood body 1, it is guided upward by the first guide section 311, so that most of the oil smoke can flow upward in the air collecting chamber 13, quickly enter the smoke collecting chamber 21, and be discharged from the smoke collecting chamber 21 by the smoke exhaust fan 22.
[0033] See also Figure 1 In the range hood of the present invention, the lower edge of the first guide section 311 is lower than the lower edge height of the air inlet 121, and the upper edge of the first guide section 311 extends to the back plate 11 of the range hood body 1. When the smoke exhaust fan 22 is running, the oil smoke enters the air collecting chamber 13 through the air inlet 121, and the flow velocity of the oil smoke when passing through the air inlet 121 is toward the back plate 11 of the range hood body 1. The lower edge of the first guide section 311 is lower than the lower edge height of the air inlet 121, indicating that the projection of the first guide section 311 to the front plate of the air collecting chamber 13 covers the air inlet 121. After the oil smoke rushes out of the air inlet 121 and enters the air collecting chamber 13, it can be completely guided by the first guide section 311 and flows to 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.
[0034] It is easy to know that when the smoke exhaust fan 22 is started, negative pressure is formed in the air collecting chamber 13, and the bottom part of the air collecting chamber 13 is also negative pressure. When the external oil smoke enters the air collecting chamber 13 through the air suction port 121, its flow direction is toward the back plate 11 of the range hood body 1. If there is no guidance of the first guide section 311, the airflow entering through the air suction port 121 will directly hit the back plate 11 of the range hood body 1. 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 13. Under the action of negative pressure, the air is deflected downward from the air suction port 121 and flows toward the bottom of the air collecting chamber 13, affecting the ability of the smoke exhaust fan 22 to extract oil smoke. A first guide section 311 is provided which is tilted backward from bottom to top. After the airflow entering the air collecting chamber 13 through the air suction port 121 collides with the first guide section 311, most of the airflow will be guided upward by the first guide section 311, and a smaller part of the airflow entering from the air suction port 121 flows downward, thereby increasing the exhaust speed of the smoke exhaust fan 22 for oil smoke.
[0035] See also Figure 1 and Figure 2In the range hood of the present invention, the guide plate 31 further includes a second guide section 312 and a connecting section 313 . The connecting section 313 connects the lower edge of the first guide section 311 and the upper edge of the second guide section 312 . The connecting section 313 is an arc section, and the connecting section 313 protrudes toward the side close to the air inlet 121 . When the smoke exhaust fan 22 is running, the oil smoke enters the air collecting chamber 13 through the air suction port 121. After the oil smoke hits the first guide section 311 of the guide plate 31, most of the oil smoke moves upward along the first guide section 311 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 121 under the action of the negative pressure in the air collecting chamber 13 and flow toward the bottom of the air collecting chamber 13, and then move downward along the second guide section 312. This part of the airflow is guided by the second guide section 312 and moves along the second guide section 312 to the bottom of the air suction port 121, and then flows upward under the action of the negative pressure in the air collecting chamber 13, thereby increasing the exhaust speed of the smoke from the smoke exhaust fan 2, and a connecting section 313 is arranged between the first guide section 311 and the second guide section 312. The connecting section 313 is an arc section to prevent the airflow at the air suction port 121 from hitting a sharp surface and generating a lot of noise.
[0036] See also Figure 1 In the range hood of the present invention, the guide surface of the second guide section 312 is tilted forward from top to bottom, and the lower edge of the second guide section 312 extends backward to the back plate 11 of the range hood body 1. The airflow that flows downward from the air inlet 121 to the bottom of the air collecting chamber 13 is guided by the connecting section 313 and flows along the second guide section 312. The second guide section 312 is tilted backward from top to bottom, and can guide the airflow to the back plate 11 of the range hood body 1, so that this part of the airflow flows downward along the back plate 11 of the range hood body 1. The farther this part of the airflow is from the air inlet 121, the smaller the impact on the airflow entering from the air inlet 121.
[0037] In the range hood of the present invention, micro-perforations are evenly distributed on the second guide section 312. When the airflow flows downward along the second guide section 312, the noise generated enters the rear side of the second guide section 312 through the micro-perforations and is silenced by the sound-absorbing cotton 32, thereby reducing the noise of the range hood when it is working.
[0038] See also Figure 3In some embodiments, the guide surface of the first guide section 311 is an arc, and the guide surface of the second guide section 312 is also an arc. After the airflow entering the air collecting chamber 13 through the air inlet 12 hits the first guide section 311, it flows upward along the first guide section 311. The airflow that deviates downward from the air inlet 121 and flows toward the bottom of the air collecting chamber 13 flows through the connecting section 313 to the second guide section 312, and flows downward along the second guide section 312. The first guide section 311 and the second guide section 312 are set as arc surfaces, so that the airflow can flow smoothly along them and guide the airflow to a greater distance toward the back plate 11 of the range hood body 1.
[0039] See also Figure 4 In other embodiments, the first guide section 311 is an inclined section, and the second guide section 312 is also an inclined section. The first guide section 311 and the second guide section 312 have different shapes. As long as they guide the airflow in the same way, they can prevent the airflow entering the air collection chamber 13 through the air suction port 121 from directly impacting the back plate 11 of the range hood body 1, and guide the airflow to flow toward the air inlet side of the smoke exhaust fan 22 in the smoke collection chamber 21, and at the same time guide the airflow that is deflected downward from the air suction port 121 and flows toward the bottom of the air collection chamber 13 downward.
[0040] In the range hood of the present utility model, the angle α between the first guide section 311 and the horizontal plane satisfies: 30°≤α≤50°. The function of the first guide section 311 is to make the airflow entering the air collecting chamber 13 through the air suction port 121 move upward smoothly along the first guide section 311, so that the angle α between the first guide section 311 and the horizontal plane satisfies: 30°≤α≤50°, which can guide the airflow upward without making the gap between the first guide section 311 and the air suction port 121 too small, causing too much wind resistance to the airflow entering the air collecting chamber 13.
[0041] See also Figure 2 In the range hood of the present invention, the air guide plate 31 further comprises a first connecting section 314 and a second connecting section 315. The lower edge of the first connecting section 314 is connected to the upper edge of the first air guide section 311, the upper edge of the second connecting section 315 is connected to the lower edge of the second air guide section 312, and the first connecting section 314 and the second connecting section 315 are connected to the back plate 11 of the range hood body 1. After the first connecting section 314 and the second connecting section 315 are connected to the back plate 11 of the range hood body 1 by screws, the first connecting section 314 and the second connecting section 315 can play a role in strengthening the back plate 11 of the range hood body 1 and reducing vibration noise.
[0042] In the range hood of the present invention, the center line of the air inlet 121 extends toward the back plate 11 of the range hood body 1 and intersects with the back plate 11 of the range hood body 1, and the height of the upper edge of the first guide section 311 is not lower than the height of the intersection of the extension line of the center line of the air inlet 121 and the back plate 11 of the range hood body 1. After the oil smoke enters the air collecting chamber 13 through the air inlet 121, the area where the oil smoke contacts the first guide section 311 is large enough, so that the first guide section 311 can better guide the oil smoke.
[0043] 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) comprises a back plate (11), a front plate (12) and an air collecting chamber (13) located therebetween, wherein the front plate (12) is provided with an air suction port (121) communicating with the air collecting chamber (13); 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 (13), and a smoke exhaust fan (22) is provided in the smoke collecting chamber (21); A flow guide assembly (3), comprising a flow guide plate (31) and sound-absorbing cotton (32), wherein the flow guide plate (31) is connected to the back plate (11), the flow guide plate (31) has a first flow guide section (311), and the sound-absorbing cotton (32) is arranged between the flow guide plate (31) and the back plate (11); When the smoke exhaust fan (22) is started, the oil smoke entering the air collecting chamber (13) through the air intake port (121) is guided by the first guide section (311) 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 (311) 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 flow guide section (311) is lower than the lower edge of the air inlet (121), and the upper edge of the first flow guide section (311) extends to the back plate (11) of the range hood body (1).
4. The range hood according to claim 1, characterized in that: The guide plate (31) further comprises a second guide section (312) and a connecting section (313), wherein the connecting section (313) connects the lower edge of the first guide section (311) and the upper edge of the second guide section (312), and the connecting section (313) is an arc section, and the connecting section (313) protrudes toward a side close to the air inlet (121).
5. The range hood according to claim 4, characterized in that: The guide surface of the second guide section (312) is arranged to be inclined forward from top to bottom, and the lower edge of the second guide section (312) extends backward to the back plate (11) of the range hood body (1).
6. The range hood according to claim 4, characterized in that: The second flow guiding section (312) is evenly distributed with micro-perforations.
7. The range hood according to claim 4, characterized in that: The guide surface of the first guide section (311) is an arc, and the guide surface of the second guide section (312) is also an arc.
8. The range hood according to claim 4, characterized in that: The first flow guiding section (311) is an inclined section, and the second flow guiding section (312) is also an inclined section.
9. The range hood according to claim 4, characterized in that: The included angle α between the first guide section (311) and the horizontal plane satisfies: 30°≤α≤50°.
10. The range hood according to claim 1, characterized in that: The center line of the air suction port (121) extends toward the back plate (11) of the range hood body (1) and intersects with the back plate (11) of the range hood body (1), and the height of the upper edge of the first guide section (311) is not lower than the height of the intersection of the extension line of the center line of the air suction port (121) and the back plate (11) of the range hood body (1).