Range hood

Abstract

The range hood comprises a range hood main body and an air supplement mechanism, the range hood main body is provided with an oil smoke suction air duct, the air supplement mechanism comprises an air supplement box arranged on the range hood main body, and the air supplement box is provided with an air inlet part communicated with an outdoor space, an air outlet part communicated with an indoor space and an air supplement air duct communicated with the air inlet part and the air outlet part. The air supplement duct and the oil smoke suction duct are mutually independent; a flow guide piece is arranged in the air supplementing channel and extends towards the air outlet part so that air flow in the air supplementing channel can be guided to the air outlet part. According to the technical scheme, the air outlet part of the air supplementing box can discharge air more uniformly.

Description

Technical Field

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

[0002] The range hood is installed in the kitchen to absorb the fumes generated during cooking. The existing range hood is supplied with air through the kitchen window. The opening of the window affects the exhaust efficiency of the range hood. Once the window is closed, the window has a poor air supply effect on the range hood, resulting in a low exhaust efficiency of the range hood. Summary of the invention

[0003] In view of the defects of the existing range hoods, the inventor proposed a range hood, which includes an air supply box, which is provided with an air inlet connected to the outdoor space, an air outlet connected to the indoor space, and an air supply duct connecting the air inlet and the air outlet. When the range hood is running, under the pressure difference between the indoor space and the outdoor space, the air in the outdoor space enters the indoor space through the air supply box for air supply. In this way, even if the kitchen window is closed, the range hood has a high air supply efficiency. However, the air flow in the air supply duct is relatively disordered, which makes the air outlet of the air outlet uneven.

[0004] The main purpose of the present invention is to provide a range hood, aiming to make the air outlet of the air supply box more uniform.

[0005] To achieve the above object, the range hood proposed by the present invention comprises:

[0006] The main body of the range hood is provided with a range hood duct for absorbing oil smoke; and

[0007] The air supply mechanism includes an air supply box arranged on the range hood body, the air supply box is provided with an air inlet portion connected to the outdoor space, an air outlet portion connected to the indoor space, and an air supply duct connecting the air inlet portion and the air outlet portion, the air supply duct and the oil fume suction duct are independent of each other; a guide member is provided in the air supply duct, and the guide member extends toward the air outlet to guide the airflow in the air supply duct to the air outlet.

[0008] Optionally, the flow guide is arranged at the air outlet.

[0009] Optionally, there are multiple flow guide members.

[0010] Optionally, a plurality of guide members are sequentially arranged in the air inlet direction of the air inlet portion, the air supply box has a wind passing surface opposite to the air outlet portion, and a side of the guide member away from the air outlet portion and the wind passing surface limit the air outlet.

[0011] Optionally, in the air inlet direction of the air inlet portion, the widths of the plurality of air outlets decrease sequentially.

[0012] Optionally, the flow guide is perpendicular to the air outlet.

[0013] Optionally, the guide member is arranged at an acute angle with the air outlet portion, and a side of the guide member away from the air outlet portion is inclined toward a direction close to the air inlet portion.

[0014] Optionally, the air guide comprises an air supply section connected to the air outlet, and an arc section connected to the air supply section, and the center of the arc section is arranged on a side of the air supply section close to the air inlet.

[0015] Optionally, in the air inlet direction of the air inlet portion, the air outlet portion is provided with a plurality of air outlet areas, each of the air outlet areas is provided with air outlet holes, and in the air inlet direction of the air inlet portion, the opening rates of the plurality of air outlet areas decrease sequentially.

[0016] Optionally, the opening ratio ranges from 3% to 50%.

[0017] Optionally, the difference in opening rates between two adjacent air outlet areas ranges from 5% to 20%.

[0018] Optionally, the aperture range of the air outlet is 2mm-10mm.

[0019] Optionally, a flow guide is provided between two adjacent air outlet areas.

[0020] Optionally, the air outlet is arranged on the front side and / or the side of the air supply box.

[0021] Optionally, the range hood body includes a smoke collecting hood, and the air supply box is arranged above the smoke collecting hood.

[0022] Optionally, in the up-down direction of the range hood, the projection of the air supply box is located within the projection of the fume collecting hood.

[0023] Optionally, the air supply box is provided in plurality, the range hood body further comprises a fan cover arranged above the smoke collecting hood, and the air supply boxes are respectively provided on the left and right sides of the fan cover.

[0024] Optionally, the air supply mechanism also includes an air supply pipe connected to the air inlet part.

[0025] Optionally, the air inlet portion is arranged at the upper end of the air supply box.

[0026] Optionally, the air supply pipe has an external pipe opening connected to the outdoor space, and the air supply mechanism also includes a rain shield arranged at the external pipe opening, the rain shield is provided with an air passage, one channel opening of the air passage is connected to the external pipe opening, and the other channel opening is arranged downward.

[0027] Optionally, a filter is provided in the air supply pipe.

[0028] In the technical solution of the present invention, the range hood includes a range hood body and an air supply mechanism. The range hood body is provided with an oil fume suction duct. It can be understood that the oil fume suction duct is connected to the outdoor space, and the oil fume suction duct is used to suck the oil fume generated during cooking to the outdoor space. The air supply mechanism includes an air supply box provided on the range hood body, the air supply box is provided with an air inlet connected to the outdoor space, an air outlet connected to the indoor space, and an air supply duct connecting the air inlet and the air outlet, and the air supply duct is independent of the oil fume suction duct. It can be understood that when the range hood is running, the oil fume in the indoor space is sucked away, which will make the atmospheric pressure of the indoor space lower than the atmospheric pressure of the outdoor space. Under the pressure difference between the indoor space and the outdoor space, the air supply box can introduce the air from the outdoor space into the air supply duct through the air inlet, and then replenish the air to the indoor space through the air outlet, so as to supply air for the range hood body. In addition, a guide is provided in the air supply duct, and the guide extends toward the air outlet to guide the airflow in the air supply duct to the air outlet. Under the guidance of the guide member, the air flow in the air supply channel flows toward the air outlet portion, so that the air outlet portion of the air supply box discharges air more evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 It is a structural schematic diagram of an embodiment of a range hood of the present invention;

[0031] Figure 2 for Figure 1 A top view of the mid-range hood;

[0032] Figure 3 for Figure 1 Front view of the center range hood;

[0033] Figure 4 for Figure 1 A structural schematic diagram of an embodiment in which the first air guide member is arranged in the air supply box;

[0034] Figure 5 for Figure 4 A cross-sectional view of the first air guide member being arranged on the air supply box;

[0035] Figure 6 for Figure 1 A structural schematic diagram of an embodiment in which the second air guide member is arranged in the air supply box;

[0036] Figure 7 for Figure 4 A cross-sectional view of the second air guide member being arranged on the air supply box;

[0037] Figure 8 for Figure 1 A schematic structural diagram of an embodiment in which the third air guide member is arranged in the air supply box;

[0038] Fig. 9 for Figure 4 A cross-sectional view of the third guide member being arranged on the air supply box;

[0039] Fig.10 This is a table of relative concentrations of oil fume gas measured when the range hood absorbs oil fume at a rate of 500 cubic meters per hour.

[0040] Description of Figure Numbers:

[0041]

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or abutment, and it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes 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 meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. 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 invention.

[0047] The range hood is installed in the kitchen to absorb the fumes generated during cooking. The existing range hood is supplied with air through the kitchen window. The opening of the window affects the exhaust efficiency of the range hood. Once the window is closed, the window has a poor air supply effect on the range hood, resulting in a low exhaust efficiency of the range hood.

[0048] In view of the defects of the existing range hoods, the inventor has proposed a range hood, which includes an air supply box, the air supply box is provided with an air inlet connected to the outdoor space, an air outlet connected to the indoor space, and an air supply duct connecting the air inlet and the air outlet. When the range hood is running, under the pressure difference between the indoor space and the outdoor space, the air in the outdoor space enters the indoor space through the air supply box for air supply. In this way, even if the kitchen window is closed, the range hood has a high air supply efficiency. However, the airflow in the air supply duct is relatively disordered, so that the air outlet is not uniform. For this reason, the present invention proposes a range hood, which aims to make the air outlet of the air supply box more uniform.

[0049] Reference Figures 1 to 9In one embodiment of the present invention, the range hood 100 includes a range hood body 200 and an air supply mechanism. The range hood body 200 is provided with an oil fume suction duct. It can be understood that the oil fume suction duct is connected to the outdoor space, and the oil fume suction duct is used to suck the oil fume generated during cooking to the outdoor space. The air supply mechanism includes an air supply box 300 provided on the range hood body 200, and the air supply box 300 is provided with an air inlet 310 connected to the outdoor space, an air outlet 330 connected to the indoor space, and an air supply duct 320 connecting the air inlet 310 and the air outlet 330, and the air supply duct 320 is independent of the oil fume suction duct. It can be understood that when the range hood 100 is in operation, the oil smoke in the indoor space is sucked away, which will make the atmospheric pressure in the indoor space lower than the atmospheric pressure in the outdoor space. Under the pressure difference between the indoor space and the outdoor space, the air supply box 300 can introduce the air from the outdoor space to the air supply duct 320 through the air inlet 310, and then replenish the air to the indoor space through the air outlet 330, so as to supply air for the range hood body 200. In addition, a guide member 400 is provided in the air supply duct 320, and the guide member 400 extends toward the air outlet 330 to guide the air flow in the air supply duct 320 to the air outlet 330. Under the guidance of the guide member, the air flow in the air supply channel flows toward the air outlet 330, so that the air outlet 330 of the air supply box 300 is more uniform.

[0050] Without loss of generality, the indoor space may be a space within a kitchen.

[0051] Optionally, in one embodiment, the guide member 400 is disposed at the air outlet 330. In this way, the airflow directed by the guide member 400 toward the air outlet 330 can be prevented from returning to the air supply duct 320 from the gap between the guide member 400 and the air outlet 330, thereby increasing the air volume of the air outlet 330. However, the present design is not limited thereto, and in other embodiments, the guide member 400 is spaced apart from the air outlet 330.

[0052] Optionally, in one embodiment, a plurality of air guides 400 are provided. The more air guides 400 there are, the stronger the airflow guidance effect is, and the more conducive it is to make the air outlet 330 of the air supply box 300 discharge air more evenly.

[0053] It should be noted that, in the present application, "a plurality" refers to more than two.

[0054] Optionally, in one embodiment, in the air inlet direction of the air inlet 310, a plurality of guides 400 are arranged in sequence, the air supply box 300 has a wind passing surface 350 opposite to the air outlet 330, and the side of the guide 400 away from the air outlet 330 and the wind passing surface 350 limit the air outlet. In this way, the plurality of guides 400 separate the air supply box 300 into a plurality of cavities, and the adjacent cavities are connected through the air outlet. In this way, it is difficult for more airflow in one cavity to flow into another cavity, so that the airflow can be prevented from accumulating at one end of the air outlet 330 away from the air inlet 310, thereby suppressing the situation that the farther the air outlet 330 is from the air inlet 310, the faster the air flow rate is, and the closer it is to the air inlet 310, the slower the air flow rate is, so that the air outlet 330 is more uniform. However, the present design is not limited to this. In other embodiments, the plurality of guides 400 can also have other layout methods, which are not limited here.

[0055] Optionally, in one embodiment, the widths of the plurality of air outlets decrease in sequence in the air inlet direction of the air inlet portion 310. In this way, it is possible to avoid the air guide 400 located near the air inlet portion 310 blocking a lot of airflow, resulting in the cavity far from the air inlet portion 310 not receiving enough airflow, and each cavity can receive enough airflow, so that the air outlet portion 330 can discharge air more evenly.

[0056] There are many relative positions between the guide member 400 and the air outlet 330. Optionally, in one embodiment, the guide member 400 is perpendicular to the air outlet 330. In this way, the airflow guided by the guide member 400 is relatively consistent with the air outlet direction of the air outlet 330, so that the air outlet wind resistance of the air outlet 330 is small, which is convenient for the air outlet 330 to discharge air. For the convenience of the following description, the guide member 400 is defined as the first guide member 400. Optionally, in another embodiment, the guide member 400 is arranged at an acute angle with the air outlet 330, and the side of the guide member 400 away from the air outlet 330 is inclined toward the direction close to the air inlet 310. In this way, the flow space of the airflow guided by the guide member 400 is gradually reduced, which is conducive to increasing the wind pressure of the airflow on the air outlet 330, and facilitating the air outlet 330 to discharge air. For the convenience of the following description, the guide member 400 is defined as the second guide member 400. Optionally, in another embodiment, the guide member 400 includes an air supply section 420 connected to the air outlet 330, and an arc section 410 connected to the air supply section 420, and the center of the arc section 410 is set on the side of the air supply section 420 close to the air inlet 310. In this way, the arc section 410 is conducive to receiving the airflow entering from the air inlet 310, and the process of the airflow flowing from the arc section 410 to the air supply section 420 is relatively smooth, the airflow kinetic energy loss is small, and the airflow still has high kinetic energy when it reaches the air outlet 330, which is conducive to the air outlet 330 to discharge air. For the convenience of the following description, the guide member 400 is defined as the third guide member 400.

[0057] Optionally, in one embodiment, a side edge of a portion of the guide member 400 away from the air outlet 330 is exposed to the air inlet 310, so that the portion of the guide member 400 can receive the airflow. However, the present design is not limited thereto, and in other embodiments, a side edge of all the guide members 400 away from the air outlet 330 is exposed to the air inlet 310.

[0058] Optionally, in one embodiment, in the air inlet direction of the air inlet 310, the air outlet 330 is provided with a plurality of air outlet areas 340, and the air outlet areas 340 are provided with air outlet holes, and in the air inlet direction of the air inlet 310, the opening rates of the plurality of air outlet areas 340 decrease in sequence. It can be understood that the airflow is easily accumulated at one end of the air outlet 330 away from the air inlet 310, so that the air pressure of the air outlet area 340 farther from the air inlet 310 is greater, and the greater the air pressure, the more conducive to improving the air outlet speed of the air outlet area 340. The smaller the opening rate of the air outlet area 340, the greater the wind resistance of the airflow from the air outlet 330 into the indoor space, and the smaller the flow rate of the airflow. In this way, the air outlet area 340 with a smaller opening ratio will be subjected to a higher air pressure, while the air outlet area 340 with a larger opening ratio will be subjected to a lower air pressure, thereby making the air outlet speed of the area with a smaller opening ratio and the air outlet speed of the air outlet area 340 with a larger opening ratio closer, thereby making the air outlet of the air outlet part 330 more uniform.

[0059] Optionally, in one embodiment, the range of the opening ratio is 3%-50%. The effect of the opening ratio of the air outlet portion 330 on the oil fume absorbing effect of the range hood 100 can be referred to Fig.10 , Fig.10 The data is measured when the range hood 100 absorbs 500 cubic meters per hour of oil smoke. Fig.10 The breathing zone in the above description refers to an area at a height of 1.2m-1.4m and a distance of 15cm-25cm from the front of the range hood 100. Fig.10 It can be found that, in the absence of an air supply mechanism, when the air volume of the range hood 100 is 500 cubic meters per hour, the relative concentration of oil smoke measured in the breathing zone is 22.66%, and the relative concentration of oil smoke measured in the indoor space is 63.87%, and the oil smoke escape phenomenon is very obvious. When the opening rate is 10%, 20%, and 30%, whether the guide member 400 is the first guide member 400, the second guide member 400, or the third guide member 400, the relative concentration of oil smoke gas measured in the breathing zone is less than 2%, and the relative concentration of oil smoke gas measured in the indoor space is less than 2%. In this way, when the opening rate ranges from 3% to 50%, the range hood 100 has a very good effect of absorbing oil smoke, reducing the harm of oil smoke escape to people. Further, in one embodiment, the opening rate ranges from 5% to 40%.

[0060] Optionally, in one embodiment, the difference in the opening rate of two adjacent air outlet areas 340 is in the range of 5%-20%. In this way, the relative concentration of oil fume gas measured in the breathing zone and the indoor space can be lower than the relative concentration of oil fume gas measured in the breathing zone and the indoor space when there is no air supply mechanism. The range hood 100 has a good oil fume absorbing effect. Further, in one embodiment, the difference in the opening rate of two adjacent air outlet areas 340 is in the range of 10%-20%.

[0061] Optionally, in one embodiment, the number of the air outlet areas 340 ranges from 3 to 8. The fewer the number of the air outlet areas 340, the worse the air outlet uniformity of the air outlet portion 330, and the more the number of the air outlet areas 340, the more complex the air outlet portion 330 is, and the higher the difficulty in manufacturing the air outlet portion 330. Therefore, when the number of the air outlet areas 340 ranges from 3 to 8, the air outlet uniformity of the air outlet portion 330 is better, and the difficulty in manufacturing the air outlet portion 330 is lower.

[0062] Optionally, in one embodiment, the aperture of the air outlet is in the range of 2mm-10mm. If the aperture of the air outlet is large, mosquitoes are easy to enter the air supply duct 320 to reproduce, and if the aperture of the air outlet is small, the flow rate of the air supply airflow is low, and the airflow is easy to be turbulent, which can easily drive the oil smoke to escape from the smoke hood 210. Therefore, when the aperture of the air outlet is in the range of 2mm-10mm, it is not easy for mosquitoes to enter the air supply duct to reproduce, and the flow rate of the air supply airflow is high, so as to avoid the airflow from being turbulent and driving the oil smoke to escape from the smoke hood 210. Further, in one embodiment, the aperture range is 4mm-6mm.

[0063] Optionally, in one embodiment, a guide member 400 is disposed between two adjacent air outlet areas 340. In this way, the wind pressure received by the same air outlet area 340 is relatively consistent, which is conducive to more uniform air discharge from the air outlet portion 330.

[0064] Optionally, in one embodiment, the air outlet 330 is arranged on the front side and / or the side of the air supply box 300. It should be noted that the side refers to at least one side of the left and right sides of the air supply box 300. It is worth mentioning that in the kitchen, users sometimes install wall cabinets on the left and right sides of the range hood 100 to facilitate the placement of kitchen utensils. In this way, arranging the air outlet 330 on the front side of the air supply box 300 is conducive to avoiding the wall cabinet from blocking the airflow delivered by the air outlet 330, so that the flow rate of the airflow is higher, so that the air supply mechanism has a better air supply effect on the range hood 100. In addition, the air outlet 330 is arranged on the front side of the air supply box 300 so that the airflow delivered by the air outlet 330 can be blown to the user, so that the user can breathe the fresh air in the outdoor space.

[0065] Optionally, in one embodiment, the volume of the air supply box 300 is in the range of 30000000mm3 -60000000mm 3 The smaller the volume of the air supply box 300, the worse the air supply effect of the air supply mechanism on the range hood body 200. The larger the volume of the air supply box 300, the larger the space occupied by the range hood 100. 3 -60000000mm 3 When the air supply mechanism is used, the air supply effect on the range hood body 200 is better, and the space occupied by the range hood 100 is smaller. The size of the air supply box 300 can be, but is not limited to, 400 mm long, 240 mm wide, and 520 mm high.

[0066] Optionally, in one embodiment, the range hood body 200 includes a fume hood 210, and the air supply box 300 is disposed above the fume hood 210. In this way, the air outlet is at least higher than the fume hood 210, and the airflow discharged from the air outlet is blown to drive the oil fume above the fume hood 210, thereby preventing the oil fume from accumulating above the indoor space, and thus improving the exhaust efficiency of the range hood 100.

[0067] Optionally, in one embodiment, in the vertical direction of the range hood 100, the projection of the air supply box 300 is located within the projection of the fume hood 210. In this way, the range hood 100 has a relatively compact structure, so that the range hood 100 occupies a relatively small area. However, the present design is not limited thereto, and in other embodiments, in the vertical direction, the projection of the air supply box 300 overlaps with the projection of the fume hood 210.

[0068] Optionally, in one embodiment, a plurality of air supply boxes 300 are provided, and the range hood body 200 further includes a fan cover 220 disposed above the fume collecting hood 210, and air supply boxes 300 are respectively disposed on the left and right sides of the fan cover 220. In this way, the air supply area of ​​the air supply box 300 is relatively wide, which is conducive to improving the air supply effect of the air supply mechanism on the range hood 100. However, the present design is not limited thereto, and in other embodiments, the air supply box 300 may also be disposed on the front side of the fan cover 220.

[0069] Optionally, in one embodiment, the air supply mechanism further includes an air supply pipe connected to the air inlet 310. Multiple air supply boxes 300 share the same air supply pipe, which is beneficial to saving materials for the range hood 100 and saving the cost of producing the range hood 100. Without loss of generality, the wall of the kitchen can also be provided with fewer holes for the air supply pipe to pass through, thereby reducing the steps of installing the range hood 100 in the kitchen. However, the present design is not limited to this. In other embodiments, multiple air supply pipes are provided, and one air supply pipe is connected to one air inlet 310, thereby improving the air supply effect of the air supply mechanism.

[0070] Optionally, in one embodiment, the air inlet 310 is disposed at the upper end of the air supply box 300. In this way, the range hood 100 has a more compact structure, so that the range hood 100 occupies a smaller area. However, the present design is not limited thereto, and in other embodiments, the air inlet 310 may also be disposed behind the air supply box 300.

[0071] Optionally, in one embodiment, the air supply pipe has an outer pipe opening connected to the outdoor space, and the air supply mechanism also includes a rain shield provided at the outer pipe opening, and the rain shield is provided with an air passage, one passage opening of the air passage is connected to the outer pipe opening, and the other passage opening is arranged downward. In this way, rainwater can be effectively prevented from entering the air supply box 300 from the outer pipe opening, thereby preventing rainwater in the outdoor space from entering the indoor space. It is worth mentioning that the rain shield can also prevent dust from entering the air supply box 300, thereby preventing dust in the outdoor space from entering the indoor space.

[0072] Optionally, in one embodiment, a filter is provided in the air supply pipe, so that the air entering the air supply box 300 from the outdoor space can be purified, so that the user can breathe relatively fresh air.

[0073] Optionally, in one embodiment, the diameter of the air supply pipe is in the range of 100 mm to 200 mm. Thus, when the diameter of the air supply pipe is in the range of 100 mm to 200 mm, the air supply mechanism can provide a better air supply effect to the range hood body 200, and the space occupied by the range hood 100 is smaller. The diameter of the air supply pipe may be, but is not limited to, 180 mm.

[0074] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A range hood, characterized in that: include: The main body of the range hood is provided with an air duct for absorbing oil smoke; as well as The air supply mechanism includes an air supply box arranged on the range hood body, the air supply box is provided with an air inlet portion connected to the outdoor space, an air outlet portion connected to the indoor space, and an air supply duct connecting the air inlet portion and the air outlet portion, the air supply duct and the oil fume suction duct are independent of each other; a guide member is provided in the air supply duct, and the guide member extends toward the air outlet to guide the airflow in the air supply duct to the air outlet.

2. The range hood according to claim 1, characterized in that: The flow guide is arranged on the air outlet portion.

3. The range hood according to claim 2, characterized in that: There are multiple flow guide members.

4. The range hood according to claim 3, characterized in that: In the air inlet direction of the air inlet, a plurality of guide members are arranged in sequence, the air supply box has a wind passing surface opposite to the air outlet, and a side of the guide member away from the air outlet and the wind passing surface limit the air outlet.

5. The range hood according to claim 4, characterized in that: In the air inlet direction of the air inlet portion, the widths of the plurality of air outlets decrease sequentially.

6. The range hood according to claim 1, characterized in that: The flow guide is perpendicular to the air outlet; Or, the guide member is arranged at an acute angle with the air outlet portion, and a side of the guide member away from the air outlet portion is inclined toward a direction close to the air inlet portion; Alternatively, the air guide comprises an air supply section connected to the air outlet, and an arc section connected to the air supply section, and the center of the arc section is arranged on a side of the air supply section close to the air inlet.

7. The range hood according to claim 1, characterized in that: In the air inlet direction of the air inlet portion, the air outlet portion is provided with a plurality of air outlet areas, each of which is provided with air outlet holes. In the air inlet direction of the air inlet portion, the opening rates of the plurality of air outlet areas decrease sequentially.

8. The range hood according to claim 7, characterized in that: The range of the opening rate is 3%-50%; And / or, the difference in opening rate between two adjacent air outlet areas is in the range of 5%-20%.

9. The range hood according to claim 7, characterized in that: The aperture of the air outlet is in the range of 2mm-10mm.

10. The range hood according to claim 7, characterized in that: A flow guide is provided between two adjacent air outlet areas.

11. The range hood according to any one of claims 1 to 10, characterized in that: The air outlet is arranged at the front side and / or the side of the air supply box.

12. The range hood according to claim 1, characterized in that: The range hood body comprises a smoke collecting hood, and the air supply box is arranged above the smoke collecting hood.

13. The range hood according to claim 12, characterized in that: In the up-down direction of the range hood, the projection of the air supply box is located within the projection of the fume collecting hood; And / or, the air supply boxes are provided in plurality, the range hood body further comprises a fan cover arranged above the smoke collecting hood, and the air supply boxes are respectively provided on the left and right sides of the fan cover.

14. The range hood according to claim 12, characterized in that: The air supply mechanism also includes an air supply pipe connected to the air inlet portion.

15. The range hood according to claim 14, characterized in that: The air inlet portion is arranged at the upper end of the air supply box; And / or, the air supply pipe has an outer pipe opening connected to the outdoor space, the air supply mechanism further includes a rain shield provided at the outer pipe opening, the rain shield is provided with an air passage, one passage opening of the air passage is connected to the outer pipe opening, and the other passage opening is arranged downward; And / or, a filter is provided in the air supply pipe.

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