New range hood

Abstract

The present invention discloses a novel range hood, comprising: a smoke collection chamber, a housing, a flow divider, and a fan. The smoke collection chamber is funnel-shaped and has an upper opening and a lower opening, the lower opening having a larger area than the upper opening. The housing is a hollow structure, the bottom wall of the housing is provided with at least one filter hole, the filter hole connecting the interior of the housing and the upper opening of the smoke collection chamber. A fan is provided near the edge of the housing, the housing has an air inlet near the fan, and the fan can inject air into the housing and blow it out of the smoke outlet. The flow divider is provided in the housing, the end of the flow divider away from the root is a free end, the free end of the flow divider extends toward the smoke outlet, and the flow divider separates two areas in the housing. The minimum distance between the free end of the flow divider and the filter hole is greater than zero, and the vertical distance between the free end of the flow divider and the top wall of the housing is less than the vertical distance between the root of the flow divider and the top wall of the housing. The present invention has low energy consumption, good smoke extraction effect, and prevents the fan from being contaminated by oil smoke.

Description

Technical Field

[0001] The present invention relates to a kitchen appliance, in particular to a novel range hood. Background Art

[0002] A range hood is an electrical appliance used to purify kitchen air. It uses a rotary fan inside the range hood to run at high speed to generate airflow, which draws the fumes generated by cooking on the stove at the bottom into the internal pipe of the range hood and discharges them. The fan of a traditional range hood is installed in the exhaust duct. The inhaled fumes need to pass through the fan wheel or blades before being discharged. Long-term use will easily cause a large amount of grease to adhere to the fan wheel or blades, and it is not easy to clean. In addition, the fan motor is subject to continuous oil and gas condensation and deposition, which affects the fan's working efficiency and leads to increased energy consumption and noise. Summary of the Invention

[0003] In order to overcome the above-mentioned defects, the present invention provides a new range hood, which has the advantages of low energy consumption, good smoke extraction effect and protection of the fan from oil fume pollution.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a new type of range hood, comprising: a smoke collecting chamber, a box body, a flow divider and a fan, the smoke collecting chamber is funnel-shaped, the smoke collecting chamber is provided with an upper opening and a lower opening, the area of ​​the lower opening is larger than the area of ​​the upper opening, the box body is a hollow structure, the bottom wall of the box body is connected to the upper opening of the smoke collecting chamber, the bottom wall of the box body is provided with at least one filter hole, the filter hole communicates with the interior of the box body and the upper opening of the smoke collecting chamber, a fan is provided near the edge of the box body, an air inlet is provided near the fan of the box body, a smoke outlet is provided at the end of the box body away from the fan, and the fan can inject airflow into the box body The smoke outlet is blown out of the body, the diverter is arranged in the box body, the root of the diverter is arranged on the bottom wall of the box body between the fan and the filter hole, the end of the diverter away from the root is the free end, the free end of the diverter extends toward the smoke outlet, the top projection surface of the diverter coincides with the top projection surface of at least one filter hole, the diverter separates two areas in the box body, the two areas are connected at the vertex of the free end of the diverter, the minimum distance between the free end of the diverter and the filter hole is greater than zero, and the vertical distance between the free end of the diverter and the top wall of the box body is less than the vertical distance between the root of the diverter and the top wall of the box body.

[0005] Optionally, the side cross-section of the diverter is composed of two arc segments and a straight line segment, the straight line segment is the root of the diverter, the intersection of the two arc segments is the free end of the diverter, the two arc segments are bent toward the bottom wall of the box, the two arc segments are bent at different angles, the curved surface of the diverter close to the bottom wall of the box is the guide layer, and the curved surface of the diverter close to the top wall of the box is the diverter layer.

[0006] Optionally, the side wall of the flow divider is fixedly connected to the side wall of the box body.

[0007] Optionally, the smoke collecting chamber is in a square funnel shape.

[0008] Optionally, a partition is provided inside the box body, the partition is provided between the fan and the flow diverter, and an air outlet is provided on the partition body. The top wall of the box body and the side wall near the fan are composed of a top plate and a movable maintenance plate. The top plate is detachably provided on the top of the box body. The top plate, the partition and the box body together form a first envelope space. The movable maintenance plate is provided near the fan. The movable maintenance plate is L-shaped. The movable maintenance plate, the partition and the box body together form a second envelope space. The flow diverter is provided in the first envelope space, the fan is provided in the second envelope space, and the air inlet is provided at the top of the movable maintenance plate near the fan.

[0009] Optionally, two filters are detachably provided at the upper opening of the smoke collecting chamber, and the two filters are arranged in a V shape.

[0010] Optionally, an oil cup is detachably hung between the two filter screens.

[0011] Optionally, the number of the filter holes is greater than four and they are arranged in a rectangular shape along the bottom wall of the box.

[0012] Optionally, the guide layer is located directly above the top projection surface of at least one filter hole.

[0013] Optionally, a connecting pipe is provided between the smoke collecting chamber and the bottom wall of the box body. The connecting pipe is a hollow pipe. One end of the connecting pipe is connected to the upper opening of the smoke collecting chamber, and the other end of the connecting pipe is connected to the bottom wall of the box body and is connected to the interior of the box body through the filter hole on the bottom wall of the box body. The cross-sectional area of ​​the connecting pipe at the end close to the upper opening of the smoke collecting chamber is larger than the cross-sectional area at the end close to the bottom wall of the box body.

[0014] The beneficial technical effects of the present invention are as follows: the novel range hood comprises: a smoke collecting chamber, a box body, a flow divider and a fan; the smoke collecting chamber is funnel-shaped, and is provided with an upper opening and a lower opening, the area of ​​the lower opening being larger than the area of ​​the upper opening; the box body is a hollow structure; the bottom wall of the box body is connected to the upper opening of the smoke collecting chamber; the bottom wall of the box body is provided with at least one filter hole, the filter hole communicating with the interior of the box body and the upper opening of the smoke collecting chamber; a fan is provided near the edge of the box body; an air inlet is provided near the fan of the box body; a smoke outlet is provided at the end of the box body away from the fan; The fan can inject air into the box body and blow it out of the smoke outlet. The diverter is arranged in the box body. The root of the diverter is arranged on the bottom wall of the box body between the fan and the filter hole. The end of the diverter away from the root is the free end. The free end of the diverter extends toward the smoke outlet. The top projection surface of the diverter coincides with the top projection surface of at least one filter hole. The diverter separates two areas in the box body. The two areas are connected at the vertex of the free end of the diverter. The minimum distance between the free end of the diverter and the filter hole is greater than zero. The free end of the diverter The vertical distance from the top wall of the box body is less than the vertical distance from the root of the diverter flow to the top wall of the box body, and the air flow is injected into the box body through the fan. A diverter flow is provided in the box body, which divides the box body into two areas. Since the vertical distance between the free end of the diverter flow and the top wall of the box body is less than the vertical distance between the root of the diverter flow and the top wall of the box body, the cross-sectional area of ​​the air flow gradually decreases when passing through the diverter flow. According to the fluid energy conservation equation, the flow velocity of the air flow increases and the pressure decreases, so that the air flow cross-sectional area at the minimum vertical distance between the diverter flow and the top wall of the box body is the smallest, and the air flow velocity reaches the maximum. The high-speed air flow forms a negative pressure zone at the filter hole on the bottom wall of the box body corresponding to the smoke outlet of the box body. The air suction effect formed by the negative pressure zone draws the oil smoke at the bottom of the smoke collecting chamber into the box body through the filter hole on the bottom wall of the box body, and then is carried out of the smoke outlet of the box body by the high-speed air flow, so that the fan does not directly contact the oil smoke, and the pollution of the fan by the oil smoke is completely avoided. The defects of the traditional range hood fan being placed in the smoke exhaust channel, the fan being contaminated by the oil smoke, the smoking efficiency is reduced, the grease is difficult to clean, and the noise is loud, etc. are effectively solved. The utility model has the advantages of low energy consumption, good smoke extraction effect and protection of the fan from oil fume pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a first-perspective stereoscopic view of the entire device of the present invention;

[0016] Figure 2 This is a stereoscopic view of the entire device of the present invention from a second viewing angle;

[0017] Figure 3 It is a front cross-sectional view of the whole machine of the present invention;

[0018] Figure 4 This is a third-angle perspective view of the housing, manifold, fan, filter holes, top plate and movable maintenance plate of the present invention, wherein the top plate and movable maintenance plate are in a separated state;

[0019] in:

[0020] 1. Smoke collecting chamber; 2. Box body; 21. Partition; 22. Air outlet; 23. Smoke outlet; 24. Top plate; 3. Diverter body; 31. Diverter layer; 32. Guide layer; 4. Fan; 5. Filter hole; 6. Movable maintenance panel; 61. Air inlet; 7. Filter screen; 8. Oil cup; 9. Connecting pipe. DETAILED DESCRIPTION

[0021] In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0022] This specific embodiment describes in detail the new range hood described in this application, such as Figures 1-4 As shown, the new range hood includes: a smoke collecting chamber 1, a box body 2, a flow divider 3 and a fan 4. The smoke collecting chamber 1 is funnel-shaped and has an upper opening and a lower opening. The area of ​​the lower opening is larger than that of the upper opening. Figure 3 Below the middle smoke collecting chamber 1, the box body 2 is a hollow structure. The bottom wall of the box body 2 is connected to the upper opening of the smoke collecting chamber 1. The bottom wall of the box body 2 is provided with at least one filter hole 5, and the filter hole 5 connects the inside of the box body 2 and the upper opening of the smoke collecting chamber 1. A fan 4 is provided near the edge of the box body 2, and an air inlet 61 is provided near the fan 4 of the box body 2. A smoke outlet 23 is provided at the end of the box body 2 away from the fan 4. The fan 4 can inject air into the box body 2 and blow out the smoke outlet 23. The flow divider 3 is provided in the box body 2, and the root of the flow divider 3 is provided on the bottom wall of the box body 2 between the fan 4 and the filter hole 5. In this embodiment, the bottom wall of the box body 2 is located at Figure 3 In the lower part of the middle box 2, the root of the flow divider 3 in this embodiment is arranged near the filter hole 5, and the end of the flow divider 3 away from the root is the free end. Figure 3 The free end of the splitter 3 extends toward the smoke outlet 23. The top projection of the splitter 3 coincides with the top projection of at least one filter hole 5. Figure 3 Upward direction Figure 3Below the center, the flow divider 3 separates two areas within the housing 2. The two areas are connected at the vertex of the free end of the flow divider 3. The minimum distance between the free end of the flow divider 3 and the filter hole 5 is greater than zero, and the vertical distance between the free end of the flow divider 3 and the top wall of the housing 2 is less than the vertical distance between the root of the flow divider 3 and the top wall of the housing 2. Airflow is injected into the housing 2 by the fan 4. The flow divider 3 is disposed in the housing 2, and the flow divider 3 separates the two areas within the housing 2. Because the vertical distance between the free end of the flow divider 3 and the top wall of the housing 2 is less than the vertical distance between the root of the flow divider 3 and the top wall of the housing 2, the flow divider 3 separates the two areas within the housing 2. As the airflow passes through the diverter 3, its cross-sectional area gradually decreases. According to the fluid energy conservation equation p+1 / 2ρν^2+ρgh=C(constant), where p=static pressure; 1 / 2ρν^2 dynamic pressure; and ρgh=weight, it is known that as the airflow velocity increases, the pressure decreases, minimizing the cross-sectional area of ​​the airflow at the minimum vertical distance between the diverter 3 and the top wall of the housing 2, and maximizing the airflow velocity. The high-speed airflow forms a negative pressure zone at the smoke outlet 23 of the housing 2, corresponding to the filter hole 5 on the bottom wall of the housing 2. The air suction effect formed by the negative pressure zone draws the oil smoke at the bottom of the smoke collecting chamber 1 into the housing 2 through the filter hole 5 on the bottom wall of the housing 2, and is then carried out of the smoke outlet 23 of the housing 2 by the high-speed airflow. This has the advantages of low energy consumption, good smoke extraction effect, and protection of the fan 4 from oil smoke contamination.

[0023] Optionally, in this embodiment, the side section of the flow divider 3 is formed by two arc segments and one straight line segment. Figure 3 In the diverter 3, the straight line segment is the root of the diverter 3, the intersection of the two arc segments is the free end of the diverter 3, the two arc segments are bent toward the bottom wall of the box body 2, and the bending angles of the two arc segments are different. The curved surface of the diverter 3 close to the bottom wall of the box body 2 is the guide layer 32, and the curved surface of the diverter 3 close to the top wall of the box body 2 is the diverter layer 31. The provision of the guide layer 32 can prevent the backflow of oil smoke and can also assist in extracting oil smoke.

[0024] In this embodiment, the side walls of the flow divider 3 and the side walls of the housing 2 are optionally fixedly connected, and the side walls of the flow divider 3 and the side walls of the housing 2 are fixedly connected. The side walls of the housing 2 in this embodiment are two parallel side walls connecting the top wall and the bottom wall of the housing 2. No smoke outlet 23 is provided on the two side walls, which can play a sealing role to achieve a better oil smoke absorption effect, and can also enhance the fixing strength of the flow divider 3 to prevent the flow divider 3 from being shaken by the airflow. It should be noted that the side walls of the flow divider 3 and the side walls of the housing 2 can also be closely attached to each other but not fixed, or there can be a gap between the side walls of the flow divider 3 and the side walls of the housing 2.

[0025] Optionally, in this embodiment, the smoke collecting chamber 1 is in a square funnel shape. Setting the smoke collecting chamber 1 in a square funnel shape can better collect oil smoke.

[0026] In this embodiment, optionally, a partition 21 is provided inside the box body 2, the partition 21 is provided between the fan 4 and the flow divider 3, and an air outlet 22 is provided on the partition 21. The top wall of the box body 2 and the side wall near the fan 4 are composed of a top plate 24 and a movable maintenance plate 6. The top plate 24 is detachably provided on the top of the box body 2. The top plate 24, the partition 21 and the box body 2 are enclosed into a first envelope space. The movable maintenance plate 6 is provided near the fan 4. The movable maintenance plate 6 is L-shaped. The movable maintenance plate 6, the partition 21 and the box body 2 are enclosed into a second envelope space. The flow divider 3 is disposed within the first envelope space, the fan 4 is disposed within the second envelope space, and the air inlet 61 is disposed at the top of the movable maintenance panel 6 near the fan 4. A partition 21 is provided within the housing 2 to seal the gap, so that air from the fan 4 can only be discharged through the air outlet 22. The top panel 24 and the movable maintenance panel 6 are detachable, allowing for convenient maintenance or cleaning of the flow divider 3 and fan 4. This effectively resolves the problem of conventional range hoods that place the fan within the exhaust duct, making it difficult to disassemble and maintain. In some optional embodiments, the movable maintenance panel 6 may not be L-shaped.

[0027] In this embodiment, two filters 7 are optionally detachably provided at the upper opening of the smoke collecting chamber 1. The two filters 7 are arranged in a V-shape. The filters 7 can coarsely filter the oil smoke to prevent impurities in the oil smoke from clogging the filter holes 5. The V-shape arrangement of the two filters 7 can also facilitate the collection of condensed oil droplets. In some optional embodiments, the two filters 7 may not be arranged in a V-shape.

[0028] Optionally, in this embodiment, an oil cup 8 is detachably hung between the two filter screens 7 , and the oil cup 8 is capable of collecting oil droplets condensed and dripping from the filter screens 7 .

[0029] In this embodiment, the number of the filter holes 5 is optionally greater than four, and they are arranged in a rectangular shape along the bottom wall of the box body 2. The rectangular arrangement of the filter holes 5 along the bottom wall of the box body 2 can achieve a better oil fume absorption effect. In some optional embodiments, the filter holes 5 can also be arranged in a non-rectangular shape, such as a triangular or circular shape.

[0030] In this embodiment, the guide layer 32 is optionally located directly above the top projection of at least one filter hole 5. Placing the guide layer 32 directly above the top projection of at least one filter hole 5 can further prevent the backflow of oil smoke and further improve the efficiency of extracting oil smoke. In this embodiment, the top projection of the guide layer 32 and the top projection of the filter hole 5 overlap by more than half. The top direction in this embodiment is Figure 3 Upward direction Figure 3 In some optional embodiments, the top projection surface of the guide layer 32 and the top projection surfaces of all the filter holes 5 coincide with each other.

[0031] In this embodiment, a connecting pipe 9 is optionally provided between the smoke collection chamber 1 and the bottom wall of the housing 2. The connecting pipe 9 is a hollow pipe. One end of the connecting pipe 9 is connected to the upper opening of the smoke collection chamber 1, and the other end is connected to the bottom wall of the housing 2 and is connected to the interior of the housing 2 through the filter hole 5 on the bottom wall of the housing 2. The cross-sectional area of ​​the connecting pipe 9 near the upper opening of the smoke collection chamber 1 is larger than the cross-sectional area of ​​the end near the bottom wall of the housing 2. The setting of the connecting pipe 9 can connect the smoke collection chamber 1 and the interior of the housing 2. This design separates the smoke collection chamber 1 from the housing 2, allowing independent installation. The housing 2 can be installed in an adaptive position according to the user's kitchen environment. The length or shape of the connecting pipe 9 can be adjusted according to the actual installation location. This design allows the housing 2 to be selectively installed in the kitchen ceiling cabinet, moving the noise source of the fan 4 in the housing 2 away from the smoke collection chamber 1, which is closer to the user, effectively overcoming the impact and trouble of the noise generated by the operation of the traditional range hood fan on the user environment. In some optional embodiments, the connecting pipe 9 can also be of other shapes.

[0032] The use of the new range hood in this embodiment has the advantages of low energy consumption, good smoke extraction effect and protection of the fan from oil fume pollution.

Claims

1. A new type of range hood, characterized in that: include: The smoke collecting chamber (1), a box (2), a flow divider (3) and a fan (4), wherein the smoke collecting chamber (1) is funnel-shaped, and is provided with an upper opening and a lower opening, wherein the area of ​​the lower opening is larger than the area of ​​the upper opening, and the box (2) is a hollow structure, wherein the bottom wall of the box (2) is connected to the upper opening of the smoke collecting chamber (1), and the bottom wall of the box (2) is provided with at least one filter hole (5), wherein the filter hole (5) communicates with the interior of the box and the upper opening of the smoke collecting chamber (1), and a fan (4) is provided near the edge of the box (2). 2) An air inlet (61) is provided near the fan (4), a smoke outlet (23) is provided at one end of the box body (2) away from the fan (4), the fan (4) can inject airflow into the box body (2) and blow it out of the smoke outlet (23), a flow divider (3) is provided in the box body (2), the root of the flow divider (3) is provided on the bottom wall of the box body (2) between the fan (4) and the filter hole (5), the end of the flow divider (3) away from the root is a free end, and the free end of the flow divider (3) is directed toward the smoke outlet (23) ) direction, the top projection surface of the flow divider (3) coincides with the top projection surface of at least one filter hole (5), the flow divider (3) separates two areas in the box body (2), the two areas are connected at the vertex of the free end of the flow divider (3), the minimum distance between the free end of the flow divider (3) and the filter hole (5) is greater than zero, the vertical distance between the free end of the flow divider (3) and the top wall of the box body (2) is less than the vertical distance between the root of the flow divider (3) and the top wall of the box body (2), and the flow divider (3) is The side cross section is surrounded by two arc segments and a straight segment, the straight segment is the root of the diverter (3), the intersection of the two arc segments is the free end of the diverter (3), the two arc segments are bent toward the bottom wall of the box (2), and the two arc segments are bent at different angles. The curved surface of the diverter (3) close to the bottom wall of the box (2) is the guide layer (32), and the curved surface of the diverter (3) close to the top wall of the box (2) is the diverter layer (31), and the side wall of the diverter (3) is fixedly connected to the side wall of the box (2).

2. The novel range hood according to claim 1, characterized in that: The smoke collecting chamber (1) is in the shape of a square funnel.

3. The novel range hood according to claim 1, characterized in that: A partition (21) is provided inside the box body (2), and the partition (21) is provided between the fan (4) and the flow divider (3). An air outlet (22) is provided on the partition (21). The top wall of the box body (2) and the side wall near the fan (4) are composed of a top plate (24) and a movable maintenance plate (6). The top plate (24) is detachably provided on the top of the box body (2). The top plate (24), the partition (21) and the box body (2) together form a first envelope space. The movable maintenance plate (6) is provided near the fan (4). The movable maintenance plate (6) is L-shaped. The movable maintenance plate (6), the partition (21) and the box body (2) together form a second envelope space. The flow divider (3) is provided in the first envelope space, and the fan (4) is provided in the second envelope space. The air inlet (61) is provided at the top of the movable maintenance plate (6) near the fan (4).

4. The novel range hood according to claim 1, characterized in that: Two filter screens (7) are detachably provided at the upper opening of the smoke collecting chamber (1), and the two filter screens (7) are arranged in a V shape.

5. The novel range hood according to claim 4, characterized in that: An oil cup (8) is detachably hung between the two filter screens (7).

6. The novel range hood according to claim 1, characterized in that: The number of the filter holes (5) is greater than four and they are arranged in a rectangular shape along the bottom wall of the box body (2).

7. The novel range hood according to claim 6, characterized in that: The guide layer (32) is located directly above the top projection surface of at least one filter hole (5).

8. The novel range hood according to claim 1, characterized in that: A connecting pipe (9) is provided between the smoke collecting chamber (1) and the bottom wall of the box body (2). The connecting pipe (9) is a hollow pipe. One end of the connecting pipe (9) is connected to the upper opening of the smoke collecting chamber (1), and the other end of the connecting pipe (9) is connected to the bottom wall of the box body (2) and is connected to the interior of the box body (2) through the filter hole (5) on the bottom wall of the box body (2). The cross-sectional area of ​​the end of the connecting pipe (9) close to the upper opening of the smoke collecting chamber (1) is larger than the cross-sectional area of ​​the end close to the bottom wall of the box body (2).

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