Range hood

Abstract

The present application relates to a kind of range hood, comprising: casing, with the front open smoke chamber;Panel, rotationally disposed in the front of casing, and can open and close the front open of smoke chamber;Range hood further includes the air inlet assembly connected between the back of panel and casing, and can adjust posture with the deflection of panel, in the open state of panel, air inlet assembly and the back of panel jointly define the air inlet duct with the front open of smoke chamber at least partial area is communicated, air inlet assembly is also provided with the air inlet in the adjacent bottom edge of panel and is communicated with air inlet duct.In the open state of panel, air inlet duct jointly defined by air inlet assembly and the back of panel its air inlet adjacent bottom edge of panel, more close to the position of smoke source, oil can be timely inhaled into the air inlet generated during cooking process, reduce the oil smoke escape situation, ensure the effect of range hood.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to a range hood. Background Technology

[0002] A range hood is a kitchen appliance used to purify the kitchen environment. Range hoods generally include top-mounted and bottom-mounted types. Top-mounted range hoods are more aesthetically pleasing, but their smoke inlet is higher, limiting their smoke extraction effectiveness. Compared to top-mounted range hoods, bottom-mounted range hoods have a lower smoke inlet; however, due to the limitations of their external shape and internal duct structure, current bottom-mounted range hoods cannot reach the cooking fumes as effectively, significantly restricting their smoke extraction efficiency.

[0003] To meet the need for a slim and lightweight design of range hoods, a thin design is adopted, which means that the front and rear depth of the casing is made thinner. For example, Chinese invention patent application with application number CN202020066610.2 (authorization announcement number: CN211822584U) discloses a range hood, including a casing and a fan system disposed in the casing. The lower part of the casing has a vertically extending smoke inlet chamber, and the front side wall of the lower part of the casing has a smoke inlet that communicates with the smoke inlet chamber. A smoke baffle that extends forward horizontally or obliquely along the upper edge of the smoke inlet is provided.

[0004] However, the aforementioned range hoods still have some shortcomings. The air inlet of these range hoods is generally horizontal and facing forward, which makes the air intake direction of the range hood at a certain angle to the direction of the rising fumes. This is not conducive to the intake of fumes, and the fumes will escape from the sides and front when stir-frying.

[0005] Therefore, existing range hoods still need further improvement. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a range hood that can move the air inlet down to be closer to the smoke source and improve the smoke extraction effect, in light of the current state of the technology.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a range hood, comprising:

[0008] The housing has a smoke inlet chamber with an open front.

[0009] A control panel is rotatably located at the front of the housing and can open and close the front opening of the smoke inlet chamber;

[0010] The range hood also includes an air intake assembly connected between the back of the panel and the housing, which can adjust its posture as the panel is deflected. When the panel is in the open state, the air intake assembly and the back of the panel together define an air intake duct that communicates with at least a portion of the front opening of the smoke inlet chamber. The air intake assembly also has an air inlet near the bottom edge of the panel that communicates with the air intake duct.

[0011] To simplify the structure of the air intake assembly, the air intake assembly includes an air intake plate, a left side plate, a right side plate, and a telescopic plate assembly. The left and right side plates are connected to the left and right sides of the panel and both extend into the housing. The air intake plate extends in the left-right direction and has a first side and a second side opposite to each other in the front-back direction. The air intake plate has the air inlet. The telescopic plate assembly extends in the left-right direction and has a first side and a second side opposite to each other in its telescopic direction. The first side of the telescopic plate assembly is rotatably connected to the second side of the air intake plate about its left-right extending axis. The second side is connected to the housing about its left-right extending axis. The first side of the air intake plate is connected to the back of the panel and is arranged at an angle to the panel. The air intake plate, left side plate, right side plate, telescopic plate assembly, and the back of the panel together define the air intake duct. It is conceivable that the telescopic plate assembly can be replaced with a foldable and unfoldable folding plate structure.

[0012] To achieve telescopic adjustment of the telescopic plate assembly, the assembly includes a first plate and a second plate that can slide relative to each other along a straight line. The left and right sides of the first plate and the left and right sides of the second plate are slidably engaged with pins via grooves. It is conceivable that one of the two plates of the telescopic plate assembly can be embedded in the hollow interlayer of the other plate.

[0013] To ensure the aesthetics of the range hood when it is off, the air intake assembly is housed inside the casing when the panel is closed.

[0014] To construct a reasonable oil path, as an improvement, when the panel is closed, it extends vertically, and the telescopic plate assembly slopes downwards and backwards from its second side to its first side. The air intake plate is located below the first side of the telescopic plate assembly and slopes downwards and forwards from its second side to its first side. The air intake plate also has an oil drain near its first side for oil dripping. When the panel is open, the air intake plate slopes downwards and backwards from its first side to its second side, and the telescopic plate assembly slopes downwards and forwards from its second side to its first side. This structural design prevents oil from dripping onto the stovetop from the air intake assembly and the panel when the panel is open, and ensures that oil flows smoothly from the air intake assembly to the casing after the panel is closed, eventually flowing into the oil cup.

[0015] To adapt to different cooking modes, the telescopic plate assembly is also equipped with a smoke inlet, and the bottom of the casing is equipped with an auxiliary air intake. When the air intake assembly is in the retracted state, the smoke inlet, the air intake of the air intake plate, and the auxiliary air intake are aligned vertically. When there is less oil smoke (such as in steaming or boiling cooking modes), the air intake assembly does not need to be opened with the panel. The smoke can enter from the auxiliary air intake at the bottom of the casing, and then rise through the air intake of the air intake plate and the smoke inlet of the telescopic plate assembly into the fan system. This reduces the resistance of the smoke flow within the casing and improves the smoke extraction effect.

[0016] To reduce the escape of oil fumes and facilitate the flow of oil inside the casing, the auxiliary air intake at the bottom of the casing is tilted downwards from front to back.

[0017] To ensure effective fume extraction, the front opening of the fume inlet chamber is divided into a first air inlet zone and a second air inlet zone located below the first air inlet zone. The air inlet duct is connected to the first air inlet zone. When the panel is tilted forward and open, the second air inlet zone also opens accordingly, and the air inlet on the air inlet plate moves forward and downward. The two air inlets work together to greatly improve the fume extraction effect and reduce fume escape.

[0018] Normally, the panel can be opened manually by the user. However, to achieve automated control of the panel and air intake components, a drive device is also installed inside the housing. The power output end of this drive device is connected to the back of the panel, thereby causing the panel to flip back and forth. Range hoods typically have a fume concentration sensor. Both the drive device and the fume concentration sensor can be electrically connected to the range hood's control system. Therefore, the control system can control the drive device based on the fume concentration signal transmitted by the sensor, thereby opening and closing the panel.

[0019] As an improvement, the drive device includes an electric actuator, the main body of which is hinged to the rear side wall of the housing, and the end of the telescopic rod of the electric actuator is rotatably connected to the panel. It is conceivable that the drive device could also employ a motion mechanism formed by a drive motor and a hinge assembly to drive the panel to deflect.

[0020] Compared with the prior art, the advantages of the present invention are as follows: An air intake component that can adjust its posture as the panel is deflected is provided between the back of the panel and the housing. When the panel is open, the air intake duct defined by the air intake component and the back of the panel has its air inlet near the bottom edge of the panel, which is closer to the location of the smoke source. The oil fumes generated during cooking can be drawn into the air inlet in time, reducing the escape of oil fumes and ensuring the oil fume absorption effect. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a range hood according to an embodiment of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the range hood according to another embodiment of the present invention (the left side panel of the casing is omitted).

[0023] Figure 3 This is a left view of the range hood according to an embodiment of the present invention (the left side panel of the casing is omitted, and the panel is in the open state).

[0024] Figure 4 This is a three-dimensional structural diagram of the combined structure of the air intake component and the panel of the range hood according to an embodiment of the present invention;

[0025] Figure 5 This is a left view of the range hood according to an embodiment of the present invention (the left side panel of the casing is omitted, and the panel is in the closed state).

[0026] Figure 6 This is a three-dimensional structural diagram of the combination structure of the air intake component and the panel of the range hood according to an embodiment of the present invention. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0029] Figures 1-6 A preferred embodiment of the range hood of the present invention is shown. The range hood includes a housing 10 and a centrifugal fan 13 disposed within the housing 10. The housing 10 defines a smoke inlet chamber 100 with an opening at the front. A panel 11 is also provided at the front of the housing 10, and the top of the panel 11 is rotatably connected to the housing 10 via a hinge mechanism. The panel 11 extends in a left-right direction relative to the axis of rotation of the housing 10. The panel 11 can open and close the front opening of the housing 10 as it rotates relative to the housing 10. When the front opening of the housing 10 is closed, the panel 11 extends substantially vertically. The centrifugal fan 13 is disposed within the housing 10. When the centrifugal fan 13 operates, it generates negative pressure, allowing external fumes to be drawn into the housing 10. An oil cup 14 is provided at the bottom of the housing 10. The oil cup 14 is an elongated strip extending left and right, used to collect oil stains flowing down from the housing 10.

[0030] See Figure 2 and Figure 3 The panel 11 is driven by a drive device to deflect back and forth relative to the main body of the housing 10. Specifically, in this embodiment, the drive device is an electric push rod 30. The main body of the electric push rod 30 is mounted on the rear side wall of the housing 10 via a hinge seat, and the end of the telescopic rod of the electric push rod 30 is rotatably connected to the back of the panel 11. When the electric push rod 30 extends, the panel 11 deflects forward to open; when the electric push rod 30 retracts, the panel 11 deflects backward to close.

[0031] An air intake assembly 2 is provided between the back of the panel 11 and the front opening of the housing 10. When the panel 11 is closed, the air intake assembly 2 is housed in the smoke inlet chamber 100 of the housing 10 as the panel 11 is offset backward. When the panel 11 is open, the air intake assembly 2 is exposed in the smoke inlet chamber 100 of the housing 10 as the panel 11 is offset forward. The air intake assembly 2 includes an air intake plate 21, a left side plate 22, a right side plate 23, and a telescopic plate assembly 24. The left side plate 22 and the right side plate 23 have basically the same structure, correspondingly connected to the left and right sides of the back of the panel 11 and extending into the housing 10. The air intake plate 21 extends in the left-right direction and has a first side 211 and a second side 212 opposite to each other in the front-back direction. The first side 211 of the air intake plate 21 is fixedly connected to the back of the panel 11 and is located near the bottom edge of the panel 11. The air intake plate 21 and the panel 11 are arranged at an angle. Figure 3 As shown, when the panel 11 is open, the air inlet plate 21 is slightly tilted downwards from its first side 211 to its second side 212, so that the air inlet 210 on the air inlet plate 21 faces the smoke source. The telescopic plate assembly 24 extends in the left-right direction and connects between the air inlet plate 21 and the frame of the front opening of the housing 10. When the air inlet plate 21 is tilted back and forth with the panel 11, the telescopic plate assembly 24 can extend or shorten accordingly, thereby meeting the posture adjustment needs of the air inlet assembly 2. Specifically, when the panel 11 is open, the air inlet plate 21, the left side plate 22, the right side plate 23, and the telescopic plate assembly 24 of the air inlet assembly 2, together with the back of the panel 11, define an air inlet duct 20 that communicates with the upper region of the front opening of the smoke inlet chamber 100. Meanwhile, since the air inlet 210 on the air inlet plate 21 moves down along the bottom edge of the panel 11 to approach the smoke source, the fumes can be drawn into the air intake duct 20 and then into the casing 10 the instant the fumes are generated, reducing the occurrence of fumes escaping. For details of the fume flow path, see [link to relevant documentation]. Figure 3 Hollow arrowhead.

[0032] The telescopic plate assembly 24 has a first side 243 and a second side 244 opposite each other in its telescopic direction. The first side 243 of the telescopic plate assembly 24 is rotatably connected to the second side 212 of the air inlet plate 21 by left and right extending pins, and the second side 244 of the telescopic plate is also connected to the front opening of the housing 10 by left and right extending pins. Specifically, the telescopic plate assembly 24 includes a first plate 241 and a second plate 242 that can slide relative to each other along a straight line. To achieve relative sliding of the first plate 241 and the second plate 242, the left and right sides of the first plate 241 are provided with first side edges 2411 perpendicular to the main body of the first plate 241, and the two first side edges 2411 are respectively provided with grooves 2410 extending along their length direction. Correspondingly, the left and right sides of the second plate 242 are provided with second side edges 2421 perpendicular to the main body of the second plate 242, and each of the two second side edges 2421 is provided with a pin 2420, which is correspondingly slidably limited in the two grooves 2410. During the telescopic plate assembly 24's extension and retraction, the main body of the first plate 241 and the main body of the second plate 242 are always in contact, thereby ensuring that the two plates remain parallel when sliding relative to each other.

[0033] Two vertically extending brackets 15 are provided on the left and right sides of the front opening of the housing 10. The ends of the two second side edges 2421 of the second plate 242 of the telescopic plate are rotatably connected to the two brackets 15 by pins. The four periphery of the air inlet plate 21 also has flanges that extend and flip towards the back side of the panel 11. The ends of the two first side edges 2411 of the first plate 241 of the telescopic plate can also be rotatably connected to the flanges on the left and right sides of the air inlet plate 21 by pins. The front opening of the smoke inlet chamber 100 is divided into a first air inlet area 101 and a second air inlet area 102 located below the first air inlet area 101, with the side edge of the second plate 242 away from the first plate 241 as the boundary. When the panel 11 is open, the air inlet duct 20 formed by the air inlet assembly 2 is connected to the first air inlet area 101. The design of the air intake component 2 in this embodiment is equivalent to changing the first air intake zone 101 from its original vertical arrangement to a near-horizontal arrangement, and placing it as close as possible to the smoke source, which greatly improves the smoke extraction effect and reduces smoke escape.

[0034] Even when the panel 11 is closed, i.e., when the air intake assembly 2 is retracted within the housing 10, it can still draw in and exhaust smoke. Specifically, the telescopic plate assembly 24 is also provided with a smoke inlet 240. The smoke inlet 240 can be located only on the first plate 241 or the second plate 242 of the telescopic plate assembly 24, or it can be located on both the first plate 241 and the second plate 242. Preferably, both the first plate 241 and the second plate 242 are provided with smoke inlets 240. The smoke inlet 240 on the first plate 241 is referred to as the first smoke inlet 240, and the smoke inlet 240 on the second plate 242 is referred to as the second smoke inlet 240. More specifically, the bottom of the housing 10 is also provided with an auxiliary air intake 12. When the air intake assembly 2 is retracted, the smoke inlet 240 on the telescopic plate assembly 24, the air intake 210 of the air intake plate, and the auxiliary air intake 12 at the bottom of the housing 10 are opposite each other in the vertical direction. In this way, when there is less oil smoke (such as in steaming or boiling cooking mode), the air intake component 2 does not need to be opened with the panel 11. The smoke can enter from the auxiliary air intake 12 at the bottom of the casing 10, and then rise through the air intake 210 of the air intake plate and the smoke inlet 240 of the telescopic plate assembly 24 into the fan system. This reduces the resistance of the smoke flow within the casing 10 and improves the smoke extraction effect. For details of the smoke flow path, see [link to relevant documentation]. Figure 5 Hollow arrow. More preferably, when panel 11 is in the open state, the first smoke inlet 240 and the second smoke inlet 240 on the first plate 241 are staggered, so that smoke will not enter the air intake duct 20 from one side of the telescopic plate assembly 24, but only from the air inlet 210 of the air intake plate 21. When panel 11 is in the closed state, at least part of the first smoke inlet 240 and the second smoke inlet 240 on the first plate 241 are opposite and connected, allowing smoke to pass through.

[0035] The matching structure of the air intake component 2 and the panel 11 of the present invention also takes into account the oil circuit design of the range hood under different states, such as... Figure 3 As shown, when the panel 11 is open, it tilts forward from top to bottom, the air inlet plate 21 tilts backward from top to bottom, and the telescopic plate assembly 24 tilts forward from top to bottom as a whole. In this way, the oil on the back of the panel 11, the air inlet plate 21, and the telescopic plate assembly 24 will all collect at the second side 212 of the air inlet plate 21 under gravity. Due to the flanged design of the outer perimeter of the air inlet plate 21, it can serve as an oil reservoir for temporary oil storage. The oil flow path is detailed in [the diagram]. Figure 3 Solid arrowhead. (Example) Figure 5As shown, when panel 11 is closed, panel 11 extends vertically. The telescopic plate assembly 24 slopes downwards and backwards from its first side 243 to its second side 244. The air inlet plate 21 is located below the second side 244 of the telescopic plate assembly 24 and is used to collect oil dripping from the telescopic plate assembly 24. The air inlet plate 21 also slopes downwards and forwards from its second side 212 to its first side 211. The air inlet plate 21 also has an oil drain 2110 near its first side 211 for oil dripping. Thus, oil on the telescopic plate assembly 24, panel 11, and air inlet plate 21 can collect at the first side 211 of the air inlet plate 21 and drip from the oil drain 2110. Simultaneously, the bottom sidewall of the housing 10 is designed to slope downwards from front to back, facilitating the flow of oil along the bottom wall of the housing 10 and ultimately collecting in the oil cup 14 at the bottom of the housing 10. The oil flow path is detailed in [details omitted]. Figure 5 Solid arrowhead.

Claims

1. A range hood, comprising: The housing (10) has a smoke inlet chamber (100) with an open front. The panel (11) is rotatably located at the front of the housing (10) and can open and close the front opening of the smoke inlet chamber (100); The feature is that the range hood further includes an air intake assembly (2) connected between the back of the panel (11) and the housing (10) and capable of adjusting its posture as the panel (11) is deflected. When the panel (11) is in the open state, the air intake assembly (2) and the back of the panel (11) together define an air intake duct (20) that communicates with at least a portion of the front opening of the smoke inlet chamber (100). The air intake assembly (2) is also provided with an air inlet (210) that communicates with the air intake duct (20) at the bottom edge near the panel (11). The air intake assembly (2) includes an air intake plate (21), a left side plate (22), a right side plate (23), and a telescopic plate assembly (24). The left side plate (22) and the right side plate (23) are connected to the left and right sides of the panel (11) and both extend into the housing (10). The air intake plate (21) extends in the left-right direction and has a first side (211) and a second side (212) opposite each other in the front-back direction. The air intake plate (21) has an air inlet (210). The telescopic plate assembly (24) extends in the left-right direction and has a first side (243) and a second side (243) opposite each other in its telescopic direction. The second side (244), the first side (243) of the telescopic plate assembly (24) is rotatably connected to the second side (212) of the air inlet plate (21) about the left and right extending axis, the second side (244) is connected to the housing (10) about the left and right extending axis, the first side (211) of the air inlet plate (21) is connected to the back of the panel (11) and is arranged at an angle with the panel (11), the air inlet plate (21), the left side plate (22), the right side plate (23), the telescopic plate assembly (24) and the back of the panel (11) together define the air inlet duct (20).

2. The range hood according to claim 1, characterized in that: The telescopic plate assembly (24) includes a first plate (241) and a second plate (242) that can slide relative to each other along a straight line. The left and right sides of the first plate (241) and the left and right sides of the second plate (242) are slidably engaged with pins (2420) through grooves (2410).

3. The range hood according to claim 1, characterized in that: When the panel (11) is closed, the air intake assembly (2) is housed inside the housing (10).

4. The range hood according to claim 1, characterized in that: When the panel (11) is closed, the panel (11) extends vertically, and the telescopic plate assembly (24) is inclined downward and backward from its second side (244) to its first side (243). The air inlet plate (21) is located below the first side (243) of the telescopic plate assembly (24) and is inclined downward and forward from its second side (212) to its first side (211). The air inlet plate (21) also has an oil drain (2110) for oil dripping near its first side (211). When the panel (11) is open, the air inlet plate (21) is inclined downward and backward from its first side (211) to its second side (212), and the telescopic plate assembly (24) is inclined downward and forward from its second side (244) to its first side (243).

5. The range hood according to claim 4, characterized in that: The telescopic plate assembly (24) is also provided with a smoke inlet (240), and the bottom of the housing (10) is also provided with an auxiliary air intake (12). When the air intake assembly (2) is in the retracted state, the smoke inlet (240), the air inlet (210) of the air intake plate and the auxiliary air intake (12) are opposite each other in the vertical direction.

6. The range hood according to claim 5, characterized in that: The auxiliary air intake (12) at the bottom of the housing (10) is inclined downward from front to back.

7. The range hood according to any one of claims 1 to 6, characterized in that: The front opening of the smoke inlet chamber (100) is divided into a first air inlet zone (101) and a second air inlet zone (102) located below the first air inlet zone (101). The air inlet duct (20) is connected to the first air inlet zone (101).

8. The range hood according to any one of claims 1 to 5, characterized in that: The housing (10) is also equipped with a drive device, the power output end of which is connected to the back of the panel (11), thereby driving the panel (11) to rotate back and forth.

9. The range hood according to claim 8, characterized in that: The drive device includes an electric push rod (30), the main body of which is hinged to the rear side wall of the housing (10), and the end of the telescopic rod of the electric push rod (30) is rotatably connected to the panel (11).

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