Range hood

Abstract

The utility model relates to a range hood which comprises a machine shell, a fan and a fan cover, the oil screen device is arranged at the air inlet and comprises a first oil screen and a second oil screen, first air inlet holes are distributed in the first oil screen, and second air inlet holes are distributed in the second oil screen; the first driving device is connected with the first oil screen and drives the first oil screen to move longitudinally; the second driving device is connected with the second oil screen and drives the second oil screen to move transversely; the cooking state recognition device is used for acquiring cooking state information below the range hood; and the controller is electrically connected with the cooking state recognition device, the first driving device and the second driving device, and controls the first driving device and the second driving device to act according to the cooking state signal transmitted by the cooking state recognition device, so that the air inlet state of the oil screen device is changed. The stroke is dispersed in the longitudinal direction and the transverse direction through the oil screen device, the installation space of the oil screen device is greatly saved, and the adjusting process of the air inlet state is more flexible.

Description

Technical Field

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

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. In most households, one side of the stove is working during cooking, producing a lot of oil smoke, while the other side produces very little or even no oil smoke. Traditional range hoods use a fixed oil net, which also makes the air inlet fixed. After the range hood is turned on, the entire oil net air inlet area is evenly inlet. Although the air volume of the whole machine is large, it is used to suck the entire stove area indiscriminately and fixedly. This results in half of the exhaust volume of the range hood sucking in clean ineffective air when one side of the burner is working and the other side is not working, or when the amount of oil smoke is relatively small, which seriously wastes the exhaust potential of the range hood itself, wastes energy, and also causes the disadvantage of high noise, resulting in a poor user experience.

[0003] To this end, the Chinese invention patent application with application number CN201810543014.6 discloses an oil net device for a range hood and a range hood, the oil net device comprising an outer oil net, at least two movable oil nets and a limiting plate, the outer oil net being arranged at the air inlet of the range hood, the at least two movable oil nets being respectively slidably arranged on both sides of the outer oil net in a horizontal direction and being located on the upper surface of the outer oil net, the limiting plate being fixedly connected to the outer oil net, and the limiting plate being tightly pressed against the upper surface of the at least movable oil net, when the movable oil net moves to one side of the outer oil net in a horizontal direction, the second air inlet hole on the movable oil net overlaps with the first air inlet hole on the outer oil net, and when the movable oil net moves to the other side of the outer oil net in a horizontal direction, the second air inlet hole on the movable oil net is staggered with the first air inlet hole on the outer oil net; the present invention can adjust the air intake volume of the left and right areas of the oil net according to the oil fume generated by the left and right stoves, so as to achieve efficient oil fume extraction and improve user experience.

[0004] However, the oil net device for the above-mentioned range hood still has certain shortcomings. The above-mentioned movable oil net is only adjusted in the horizontal movement. In order to meet the adjustment of different air intake air volume states, the movable oil net needs to be set with a larger stroke in the horizontal direction, which inevitably increases the movable space required for the movable oil net in the horizontal direction, thereby limiting the installation conditions of the oil net device and easily interfering with other components. On the other hand, the existing range hood cannot automatically adjust the air intake state of the oil net device according to the actual cooking conditions.

[0005] Therefore, existing range hoods need further improvement. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a range hood with a more flexible air volume adjustment process of an oil net device and capable of saving installation space in view of the current status of the prior art.

[0007] The technical solution adopted by the utility model to solve the above technical problems is: a range hood, comprising:

[0008] a housing having an air inlet;

[0009] An oil net device is arranged at the air inlet, comprising a first oil net and a second oil net arranged in sequence along the air flow direction at the air inlet, wherein the first oil net is provided with first air inlet holes, and the second oil net is provided with second air inlet holes;

[0010] Also includes:

[0011] A first driving device, connected to the first oil net, so as to drive the first oil net to move longitudinally relative to the second oil net;

[0012] A second driving device is connected to the second oil net, so as to drive the second oil net to move laterally relative to the first oil net;

[0013] A cooking status recognition device for obtaining cooking status information below the range hood;

[0014] The controller is electrically connected to the cooking status recognition device, the first drive device, and the second drive device, so as to control the operation of the first drive device and the second drive device according to the cooking status signal transmitted by the cooking status recognition device, thereby changing the air intake state of the oil net device.

[0015] The above-mentioned change of "air inlet state" may refer to a change in the position of the effective air inlet area of ​​the oil net device, such as single-sided air inlet or double-sided air inlet, or may refer to a change in the air volume of the set air inlet area.

[0016] As a preferred solution, in order to better adapt to the working conditions of double-sided cooking and single-sided cooking, the first oil net has a first air inlet area and a second air inlet area which are sequentially arranged in the transverse direction and are both provided with first air inlet holes, the second oil net has a third air inlet area and a fourth air inlet area which are sequentially arranged in the transverse direction and are both provided with second air inlet holes, the third air inlet area of ​​the second oil net is opposite to the first air inlet area of ​​the first oil net, the fourth air inlet area of ​​the second oil net is opposite to the second air inlet area of ​​the first oil net, and the oil net device has at least a first state, a second state and a third state as the relative positions of the first oil net and the second oil net change:

[0017] In the first state, at least part of the first air inlet holes on the first air inlet area of ​​the first oil net overlaps with at least part of the second air inlet holes on the third air inlet area of ​​the second oil net, and at least part of the first air inlet holes on the second air inlet area of ​​the first oil net overlaps with at least part of the second air inlet holes on the fourth air inlet area of ​​the second oil net;

[0018] In the second state, at least part of the first air inlet holes on the first air inlet area of ​​the first oil net overlaps with at least part of the second air inlet holes on the third air inlet area of ​​the second oil net, and the first air inlet holes on the second air inlet area of ​​the first oil net are staggered with the second air inlet holes on the fourth air inlet area of ​​the second oil net;

[0019] In the third state, the first air inlet holes on the first air inlet area of ​​the first oil net are staggered with the second air inlet holes on the third air inlet area of ​​the second oil net, and at least part of the first air inlet holes on the second air inlet area of ​​the first oil net overlap with at least part of the second air inlet holes on the fourth air inlet area of ​​the second oil net.

[0020] As another preferred scheme, in order to adjust the air intake volume more flexibly, as the relative positions of the first oil net and the second oil net change, the overlapping area of ​​the first air inlet hole on the first oil net and the second air inlet hole on the second oil net gradually increases or decreases.

[0021] As an improvement, the first driving device is a first linear driving mechanism, the power output end of the first linear driving mechanism is connected to the first oil network, and the second driving device is a second linear driving mechanism, the power output end of the second linear driving mechanism is connected to the second oil network.

[0022] As an improvement, the first linear drive mechanism includes a first electric push rod, the power output shaft of the first electric push rod is connected to the first oil net, and the second linear drive mechanism includes a second electric push rod, the power output shaft of the second electric push rod is connected to the second oil net.

[0023] As an improvement, the cooking status recognition device uses at least one of an oil smoke concentration sensor, a temperature sensor and an image detection device.

[0024] In order to more accurately identify the cooking status on the left and right sides, the cooking status identification device adopts an oil fume concentration sensor. There are two oil fume concentration sensors, which are respectively arranged on the left and right sides of the bottom of the casing.

[0025] As an improvement, the range hood is a top-suction range hood or a near-suction range hood.

[0026] Compared with the prior art, the advantages of the utility model are as follows: after the cooking status identification device identifies the cooking status under the range hood, the controller can automatically control the first drive device and the second drive device to operate according to the cooking status information, thereby driving the first oil net and the second oil net to move relative to each other in the longitudinal and transverse directions, so as to realize flexible adjustment of the air intake state of the air inlet at the position where the oil net device is located, such as flexible switching between the single-sided air intake state on the left and right sides and the simultaneous air intake state on both sides, and the air intake volume of the oil net device can also be adjusted. Compared with the prior art method of only controlling one oil net to move in a single direction to realize the air intake state adjustment, the oil net device can disperse the stroke in the longitudinal and transverse directions, which greatly saves the installation space of the oil net device and makes the adjustment process of the air intake state more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a front view of the range hood of Embodiment 1 of the utility model;

[0028] Figure 2 This is an exploded view of the oil screen device of Example 1 of the utility model;

[0029] Figure 3 This is a front view of the oil screen device of Example 1 of the utility model in a first state;

[0030] Figure 4 This is a front view of the oil screen device of Example 1 of the utility model in the second state;

[0031] Figure 5 This is a front view of the oil screen device of Example 1 of the utility model in the third state;

[0032] Figure 6 This is a front view of the oil screen device of Example 2 of the utility model;

[0033] Figure 7 This is a front view of the oil screen device of Example 2 of the utility model in another state. DETAILED DESCRIPTION

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0036] Example 1

[0037] Figure 1-Figure 5 A preferred embodiment of the range hood of the utility model is shown. The range hood includes a casing 1 and a centrifugal fan arranged in the casing 1. The casing 1 generally includes a fan frame 11 and a fume hood 12 arranged at the bottom of the fan frame 11. The inner cavity of the fan frame 11 is connected with the inner cavity of the fume hood 12. An air inlet (not shown) is provided on the fume hood 12, and external smoke can enter the fume hood 12 through the air inlet. The centrifugal fan is arranged in the fan frame 11. When the centrifugal fan is in operation, negative pressure is generated, and external oil smoke can be sucked into the fume hood 12 through the air inlet. An oil net device is also provided at the air inlet of the fume hood 12 for filtering oil smoke.

[0038] The oil net device of this embodiment includes a first oil net 21 and a second oil net 22 arranged in sequence along the air flow direction at the air inlet, and the first oil net 21 and the second oil net 22 can be stacked together. Among them, the first oil net 21 and the second oil net 22 are both rectangular extending left and right, and the length and width dimensions are basically the same. The first oil net 21 has a first air inlet area 211 and a second air inlet area 212 arranged in sequence along the first direction (that is, the horizontal direction A1) and distributed with first air inlet holes. The second oil net 22 has a third air inlet area 221 and a fourth air inlet area 222 arranged in sequence along the first direction and distributed with second air inlet holes. The third air inlet area 221 of the second oil net 22 is opposite to the first air inlet area 211 of the first oil net 21, and the fourth air inlet area 222 of the second oil net 22 is opposite to the second air inlet area 212 of the first oil net 21.

[0039] The first oil net 21 is driven by the first driving device to move relative to the second oil net 22 along the second direction (i.e., longitudinal direction A2), and the second oil net 22 is driven by the second driving device to move relative to the first oil net 21 along the first direction. The first direction is perpendicular to the second direction. Figure 1Taking the top suction range hood shown as an example, the first direction mentioned above can be understood as the left-right direction, and the second direction mentioned above can be understood as the front-back direction. The first driving device can adopt a first linear driving mechanism, preferably, the first linear driving mechanism includes a first electric push rod 31, and the power output shaft of the first electric push rod 31 is connected to the first oil net 21. The second driving device can adopt a second linear driving mechanism, preferably, the second linear driving mechanism includes a second electric push rod 32, and the power output shaft of the second electric push rod 32 is connected to the second oil net 22.

[0040] Each first air inlet hole on the first air inlet area 211 of the first oil net 21 constitutes a first air inlet hole unit 210, and each first air inlet hole on the second air inlet area 212 of the first oil net 21 constitutes at least two first air inlet hole units 210 arranged sequentially in the second direction. Each second air inlet hole on the third air inlet area 221 of the second oil net 22 constitutes at least two second air inlet hole units 220 arranged sequentially in the first direction, and each second air inlet hole on the fourth air inlet area 222 of the second oil net 22 constitutes at least two second air inlet hole units 220 arranged sequentially in the second direction. Figure 2 The first air inlet area 211 of the first oil net 21 shows a first air inlet hole unit 210, the second air inlet area 212 shows two first air inlet hole units 210 arranged sequentially in the second direction, the third air inlet area 221 of the second oil net 22 shows two second air inlet hole units 220 arranged sequentially along the first direction, and the fourth air inlet area 222 shows two second air inlet hole units 220 arranged sequentially along the second direction. The second air inlet holes in the two or more second air inlet hole units 220 arranged sequentially in the first direction on the third air inlet area 221 of the second oil net 22 mentioned above are not completely independent, that is, there may be partial overlap. For example, part of the second air inlet holes in one of the second air inlet hole units 220 on the third air inlet area 221 of the second oil net 22 also constitute part of the second air inlet holes in another second air inlet hole unit 220. Similarly, the two or more second air inlet hole units 220 arranged sequentially in the second direction on the fourth air inlet area 222 of the second oil net 22 and the two or more first air inlet hole units 210 arranged sequentially in the second direction on the second air inlet area 212 of the first oil net 21 are also the same, and they will not be repeated here.

[0041] The oil screen device of this embodiment has at least a first state, a second state and a third state as the relative positions of the first oil screen 21 and the second oil screen 22 change:

[0042] In the first state, the first air inlet hole unit 210 on the first air inlet area 211 of the first oil net 21 overlaps with one of the second air inlet hole units 220 on the third air inlet area 221 of the second oil net 22, and the two first air inlet hole units 210 on the second air inlet area 212 of the first oil net 21 overlap with the two second air inlet hole units 220 on the fourth air inlet area 222 of the second oil net 22. In this state, the left and right sides of the oil net device are in an open state and can both absorb and exhaust oil fumes.

[0043] In the second state, the first air inlet hole unit 210 on the first air inlet area 211 of the first oil net 21 overlaps with another second air inlet hole unit 220 on the third air inlet area 221 of the second oil net 22, and the two first air inlet hole units 210 on the second air inlet area 212 of the first oil net 21 and the two second air inlet hole units 220 on the fourth air inlet area 222 of the second oil net 22 are staggered. In this state, the left side of the oil net device is in an open state and can absorb and exhaust oil fumes, while the right side is in a closed state and cannot absorb and exhaust oil fumes.

[0044] In the third state, the first air inlet hole unit 210 on the first air inlet area 211 of the first oil net 21 and the two second air inlet hole units 220 on the third air inlet area 221 of the second oil net 22 are staggered, and a first air inlet hole unit 210 on the second air inlet area 212 of the first oil net 21 overlaps with a second air inlet hole unit 220 on the fourth air inlet area 222 of the second oil net 22. In this state, the right side of the oil net device is in an open state and can absorb and exhaust oil fumes, while the left side is in a closed state and cannot absorb and exhaust oil fumes.

[0045] When the oil net device is in the second state and the third state mentioned above, closing one side of the oil net device can increase the flow on the other side (increase the negative pressure). When the fan speed is constant, the negative pressure on the other side can be increased by closing the smoke outlet on one side. When the fan speed is not increased (the fan noise remains unchanged), the smoke extraction effect can also be improved. This is suitable for the scenario of cooking on one side of the stove.

[0046] Combination Figure 3 and Figure 4 The second driving device drives the second oil screen 22 along Figure 3 Move in the direction of the arrow, the oil screen device can be Figure 3 The first state shown in FIG. Figure 4 The second state shown in . Figure 3 and Figure 5 The first driving device drives the first oil screen 21 along Figure 5 Move in the direction of the arrow, the oil screen device can be Figure 3 The first state shown in FIG. Figure 5 The third state shown in .

[0047] The oil net device of this embodiment can be applied to both top-suction range hoods and close-suction range hoods.

[0048] The range hood of this embodiment further includes a cooking state recognition device disposed at the bottom of the fume hood 12. Generally, the cooking state recognition device is adapted to the two burners for cooking on the left and right sides of the stove body. The cooking state recognition device includes a first cooking state recognition sensor 141 and a second cooking state recognition sensor 142 disposed on the left and right sides of the fume hood 12. The first cooking state recognition sensor 141, the second cooking state recognition sensor 142, and the first driving device and the second driving device are all electrically connected to the controller of the range hood. The controller of the range hood can control the first driving device and the second driving device to operate according to the cooking state signal transmitted by the first cooking state recognition sensor 141 and the second cooking state recognition sensor 142, so that the oil net device is switched to an adapted state. For example, when the first cooking state recognition sensor 141 and the second cooking state recognition sensor 142 detect that there are cooking operations on both the left and right sides of the stove, the controller controls the first driving device and the second driving device to operate, and adjusts the oil net device to the corresponding first state, so that both the left and right sides can absorb and exhaust oil fumes. When the first cooking state identification sensor 141 and the second cooking state identification sensor 142 detect that cooking operation is performed only on the left side or only on the right side of the stove, the controller controls the first driving device and the second driving device to operate, and adjusts the oil net device to the corresponding second state or third state, so that the oil net device can absorb and exhaust oil fumes on one side.

[0049] The first cooking state recognition sensor 141 and the second cooking state recognition sensor 142 of this embodiment can be a fume concentration sensor or an image detection device to identify whether there is fume in the corresponding area, or a temperature detection structure can be used to detect whether the corresponding stove head is used by judging the temperature. Preferably, the first cooking state recognition sensor 141 and the second cooking state recognition sensor 142 are both fume concentration sensors.

[0050] Example 2

[0051] Figure 6-Figure 7Another preferred embodiment of the range hood of the utility model is shown. The difference between this embodiment and embodiment 1 is that: driven by the first driving device and the second driving device, the relative positions of the first oil net 21 and the second oil net 22 change, and the overlapping area of ​​the first air inlet holes 2100 on the first oil net 21 and the second air inlet holes 2200 on the second oil net 22 gradually increases or decreases. In this embodiment, the number, size and distribution position of the first air inlet holes 2100 on the first oil net 21 are the same as the number, size and distribution position of the second air inlet holes 2200 on the second oil net 22. Each first air inlet hole 2100 on the first oil net 21 can correspond one-to-one with each second air inlet hole 2200 on the second oil net 22 and overlap with each other. At this time, the air volume of the oil net device is at the maximum state. See. Figure 6 When the second oil net 22 moves leftward along the arrow direction driven by the second driving device, the first air inlet holes 2100 on the first oil net 21 and the corresponding second air inlet holes 2200 on the second oil net 22 gradually stagger in the horizontal direction A1. In this process, the air volume of the oil net device gradually decreases. Then refer to Figure 7 , the first oil net 21 moves upward along the arrow direction driven by the first driving device, and the first air inlet holes 2100 on the first oil net 21 and the corresponding second air inlet holes 2200 on the second oil net 22 continue to stagger in the longitudinal direction A2. In this process, the air volume of the oil net device continues to decrease. In this embodiment, the oil net device also disperses the air volume adjustment stroke in the longitudinal direction A2 and the transverse direction A1, which greatly saves the installation space of the oil net device and makes the air volume adjustment process more flexible.

Claims

1. A range hood, comprising: A housing (1) having an air inlet; An oil net device is arranged at the air inlet, comprising a first oil net (21) and a second oil net (22) arranged in sequence along the air flow direction at the air inlet, wherein the first oil net (21) is provided with first air inlet holes, and the second oil net (22) is provided with second air inlet holes; The invention is characterized in that it also includes: A first driving device connected to the first oil net (21), thereby driving the first oil net (21) to move along the longitudinal direction (A2) relative to the second oil net (22); A second driving device connected to the second oil net (22), thereby driving the second oil net (22) to move in a lateral direction (A1) relative to the first oil net (21); A cooking status recognition device for obtaining cooking status information below the range hood; The controller is electrically connected to the cooking status recognition device, the first drive device, and the second drive device, so as to control the operation of the first drive device and the second drive device according to the cooking status signal transmitted by the cooking status recognition device, thereby changing the air intake state of the oil net device.

2. The range hood according to claim 1, characterized in that: The first oil net (21) has a first air inlet area (211) and a second air inlet area (212) which are sequentially arranged along the transverse direction (A1) and are both provided with first air inlet holes; the second oil net (22) has a third air inlet area (221) and a fourth air inlet area (222) which are sequentially arranged along the transverse direction (A1) and are both provided with second air inlet holes; the third air inlet area (221) of the second oil net (22) is opposite to the first air inlet area (211) of the first oil net (21); the fourth air inlet area (222) of the second oil net (22) is opposite to the second air inlet area (212) of the first oil net (21); the oil net device has at least a first state, a second state and a third state as the relative positions of the first oil net (21) and the second oil net (22) change: In a first state, at least part of the first air inlet holes on the first air inlet area (211) of the first oil net (21) overlaps with at least part of the second air inlet holes on the third air inlet area (221) of the second oil net (22), and at least part of the first air inlet holes on the second air inlet area (212) of the first oil net (21) overlaps with at least part of the second air inlet holes on the fourth air inlet area (222) of the second oil net (22); In the second state, at least part of the first air inlet holes on the first air inlet area (211) of the first oil net (21) overlaps with at least part of the second air inlet holes on the third air inlet area (221) of the second oil net (22), and the first air inlet holes on the second air inlet area (212) of the first oil net (21) and the second air inlet holes on the fourth air inlet area (222) of the second oil net (22) are arranged in a staggered manner; In a third state, the first air inlet holes on the first air inlet area (211) of the first oil net (21) and the second air inlet holes on the third air inlet area (221) of the second oil net (22) are arranged in a staggered manner, and at least part of the first air inlet holes on the second air inlet area (212) of the first oil net (21) overlaps with at least part of the second air inlet holes on the fourth air inlet area (222) of the second oil net (22).

3. The range hood according to claim 1, characterized in that: As the relative positions of the first oil net (21) and the second oil net (22) change, the overlapping area of ​​the first air inlet hole (2100) on the first oil net (21) and the second air inlet hole (2200) on the second oil net (22) gradually increases or decreases.

4. The range hood according to claim 2 or 3, characterized in that: The first drive device is a first linear drive mechanism, the power output end of the first linear drive mechanism is connected to the first oil net (21), and the second drive device is a second linear drive mechanism, the power output end of the second linear drive mechanism is connected to the second oil net (22).

5. The range hood according to claim 4, characterized in that: The first linear drive mechanism comprises a first electric push rod (31), the power output shaft of the first electric push rod (31) is connected to the first oil net (21), and the second linear drive mechanism comprises a second electric push rod (32), the power output shaft of the second electric push rod (32) is connected to the second oil net (22).

6. The range hood according to claim 1, characterized in that: The cooking state recognition device adopts at least one of an oil smoke concentration sensor, a temperature sensor and an image detection device.

7. The range hood according to claim 6, characterized in that: The cooking state recognition device adopts an oil fume concentration sensor, and there are two oil fume concentration sensors, which are respectively arranged on the left and right sides of the bottom of the casing (1).

8. The range hood according to claim 1, characterized in that: The range hood is a top suction range hood or a close suction range hood.

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