Range hood

Abstract

The present invention discloses a range hood, which comprises a casing, a purification component and an air curtain, wherein the casing is provided with a smoke exhaust duct and a smoke inlet connected to the smoke exhaust duct; the purification component is arranged in the casing, the purification component forms a purification duct, the purification duct and the smoke exhaust duct are independent of each other, and the casing is provided with a purification air inlet and a purification air outlet connected to the purification duct; the air curtain component is installed in the casing and connected to the purification duct, and the casing is provided with an air curtain outlet corresponding to the air curtain component, and part of the air in the purification duct is blown out from the air curtain outlet after passing through the air curtain component. The technical solution of the present invention reduces the pollution of oil smoke to the kitchen environment and the damage to human health.

Description

Technical Field

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

[0002] During the cooking process, oil smoke will be produced, which will not only pollute the air environment, but also damage human health. Traditional range hoods can quickly exhaust oil smoke to the outside, reducing the pollution of the air environment in the kitchen and the damage to human health. However, during the cooking process, oil smoke will always escape from the traditional range hood and dissipate into the kitchen space. The escaped oil smoke will still cause oil smoke pollution and damage human health. Summary of the invention

[0003] The main purpose of the present invention is to provide a range hood, aiming to further reduce the pollution of kitchen environment and the damage to human health caused by oil smoke.

[0004] To achieve the above object, the range hood proposed by the present invention comprises:

[0005] A casing, wherein the casing is provided with a smoke exhaust duct and a smoke inlet connected to the smoke exhaust duct;

[0006] a purification component, disposed in the housing, the purification component forming a purification air duct, the purification air duct and the smoke exhaust air duct being independent of each other, the housing being provided with a purification air inlet and a purification air outlet communicating with the purification air duct; and

[0007] The air curtain piece is installed on the casing and communicated with the purification air duct. The casing is provided with an air curtain outlet corresponding to the air curtain piece. Part of the air in the purification air duct passes through the air curtain piece and is blown out from the air curtain outlet.

[0008] The technical solution of the present invention is to arrange a purification component in the casing of the range hood, the purification component forms a purification duct which is independent of the smoke exhaust duct, and the casing is provided with a purification air inlet and a purification air outlet connected to the purification duct. Through the action of the purification component, the oil smoke escaping to the kitchen environment can be further removed during the process of removing oil smoke from the smoke exhaust duct, thereby improving the kitchen environment, reducing the amount of oil smoke inhaled by the human body, and improving human health. In addition, an air curtain piece is further arranged in the casing, the air curtain piece is connected to the purification duct, and the casing is provided with an air curtain outlet corresponding to the air curtain piece. Thus, through the action of the air curtain outlet, an air curtain of purified clean air flow is formed outside the range hood. On the one hand, the air curtain can act as a barrier to reduce the escape of oil smoke in the process of leading to the smoke exhaust duct, and because the air curtain is formed in front of the range hood, it can further block the oil smoke from surging toward the cook located in front of the oil smoke inhalation, thereby further improving human health.

[0009] Optionally, the purified air outlet is located at the front side of the casing, and the air curtain is arranged adjacent to the purified air outlet.

[0010] In this embodiment, the purified air outlet is arranged on the front side of the casing, so that at least part of the purified air can be blown directly to the cook in front of the range hood, and cooperate with the wind curtain formed by the wind curtain member, so that the cook can breathe in an area full of clean air, thereby reducing the possibility of inhaling oil smoke and improving human health.

[0011] Optionally, the air outlet direction of the purified air outlet is adjustable.

[0012] In this embodiment, the air outlet direction of the purified air outlet can be adjusted according to actual needs, so that better air circulation can be achieved in the kitchen and the purified air can be better blown toward the cook.

[0013] Optionally, the range hood may be movably provided with a wind direction adjusting member at the purification air outlet, and the wind direction adjusting member may adjust the opening of the purification air outlet, so that the size of the airflow flowing out of the purification air duct through the air curtain outlet may be adjusted.

[0014] In this embodiment, the wind direction adjusting member is movably connected to the purification outlet, and controls the opening of the purification outlet to change the air flow size of the wind curtain outlet, so that the two are linked, so that the wind force regulation requirements can be met with a simple structure.

[0015] Optionally, at least two purification air outlets are arranged at a transverse interval on the front side of the casing, and one purification air outlet corresponds to one wind curtain air outlet.

[0016] In this embodiment, at least two purified air outlets are arranged at intervals on the front side of the casing, thereby ensuring the maximum air sweeping range.

[0017] Optionally, the air curtain outlet extends in the transverse width direction of the casing.

[0018] In this embodiment, such an arrangement enables the airflow blown out by the air curtain to effectively block the escape of oil smoke.

[0019] Optionally, a length of the air curtain outlet extending in a lateral direction of the casing is greater than one half of a lateral dimension of the casing.

[0020] In this embodiment, such an arrangement enables the airflow blown out by the air curtain to effectively block the escape of oil smoke.

[0021] Optionally, the housing includes a smoke collecting hood located at the bottom thereof, and the purification assembly and the air curtain are located in the smoke collecting hood;

[0022] The purification air outlet, the air curtain air outlet, the purification air inlet and the smoke inlet are sequentially opened in the height direction of the smoke collecting hood.

[0023] In this embodiment, the purification air outlet, the wind curtain air outlet and the smoke outlet are opened in sequence in the height direction of the smoke hood. This arrangement allows most of the oil smoke to be discharged through the smoke outlet and the smoke exhaust duct first, and a small amount of unabsorbed oil smoke is sucked in through the purification air inlet above and then filtered through the purification component. In this way, the power distribution in the smoke removal process is reasonable and the smoke removal efficiency is higher.

[0024] Optionally, the smoke hood includes a main hood body with a front opening, a front panel connected to the main hood body and spliced ​​in the front opening, and a lower cover plate, the lower cover plate is located below the front panel, the front panel is provided with the purification air outlet, the lower cover plate includes a first cover plate connected to the front panel, the first cover plate is inclined toward the rear side and is set at an acute angle to the horizontal plane, wherein the first cover plate is provided with the wind curtain outlet.

[0025] In this embodiment, the first cover plate is inclined toward the rear side and is set at an acute angle to the horizontal plane, so that the wind curtain outlet opened thereon blows out the wind curtain airflow toward the front and bottom, which can effectively isolate the cook from the oil smoke and reduce the possibility of human inhalation of oil smoke.

[0026] Optionally, the lower cover plate further includes a second cover plate and a third cover plate, the first cover plate, the second cover plate and the third cover plate are sequentially connected from top to bottom and are arranged at an angle between each other, and the purified air inlet is opened on the second cover plate.

[0027] In this embodiment, the layout is reasonable.

[0028] Optionally, the smoking opening includes an upper smoking opening opened on the second cover plate, and a lower smoking opening formed by the cooperation of the third cover plate and the main cover body.

[0029] In this embodiment, the upper and lower smoking ports are arranged reasonably and can remove oil smoke more effectively.

[0030] Optionally, the number of the purified air inlets corresponds to the number of the purified air outlets and at least two are provided, and the upper smoking port is located between two adjacent purified air inlets.

[0031] In this embodiment, the upper smoke outlet plays a major role in removing the oil smoke escaping upwards. The upper smoke outlet is arranged between two adjacent purified air inlets so that the oil smoke escaping upwards can be mainly removed through the smoke outlet.

[0032] Optionally, a purification air duct in the purification component is connected to a purification air inlet and a purification air outlet, and the purification component is arranged on opposite sides of the smoke exhaust air duct.

[0033] In this embodiment, the number of purification components corresponds to the number of the purification air outlets, making the control more flexible.

[0034] Optionally, the wind curtain member includes an elongated air guide tube, the air guide tube is provided with an air inlet connected to the purification air duct, the air guide tube is provided with an exhaust port extending in its length direction, the exhaust port is correspondingly connected to the wind curtain outlet, wherein the exhaust port and the wind curtain outlet are both elongated.

[0035] In this embodiment, the wind curtain piece is arranged in an elongated shape, which can be helpful in forming a wind curtain with a larger coverage area.

[0036] Optionally, the air curtain piece further includes a mounting portion connected to the air guide tube, and the air curtain piece is detachably connected to the smoke collecting hood via the mounting portion.

[0037] In this embodiment, a mounting portion is provided through the air curtain member so as to be detachably connected to the smoke collecting hood, which makes assembly and disassembly more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] 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.

[0039] Figure 1 It is a schematic diagram of the three-dimensional structure of a range hood according to an embodiment of the present invention;

[0040] Figure 2 for Figure 1 A three-dimensional view of a central range hood from a top-down perspective;

[0041] Figure 3 for Figure 1 Schematic diagram of the exploded structure of the central range hood, in which the main hood hides some of the structure;

[0042] Figure 4 for Figure 1 A schematic diagram of the structure of the central range hood located in the smoke collecting hood, with the lower cover and front panel removed;

[0043] Figure 5 for Figure 4 A structural schematic diagram of another perspective of the structure in;

[0044] Figure 6 for Figure 4 A schematic diagram of a top view of the structure in FIG.

[0045] Figure 7 for Figure 6 A schematic diagram of the structure after removing the lower cover plate;

[0046] Figure 8 for Figure 1 A schematic diagram of the front structure of a central range hood;

[0047] Fig. 9 for Figure 8 A cross-sectional view at AA in FIG. 1 shows that the purified air outlet is directed obliquely upward;

[0048] Fig.10 for Figure 8 A cross-sectional view at AA in FIG. 1 shows that the purified air outlet is directed obliquely downward;

[0049] Fig.11 for Figure 8 A cross-sectional view at BB in FIG. 1 , in which the purified air outlet is directed obliquely downward;

[0050] Fig.12 for Figure 1 Schematic diagram of air circulation of a central range hood from one angle;

[0051] Fig.13 for Figure 1 Schematic diagram of air circulation of the central range hood from another viewing angle.

[0052] Description of Figure Numbers:

[0053] Label name Label name 1 chassis 1251 Purify air inlet 11 Fan cover 126 The third cover 12 Fume hood 20 Purification components 121 Main cover 21 Purification fan 122 Front Panel 22 Filters 1221 Purify air outlet 30 Air curtain 123 Lower cover 301 Air duct 1231 Lower smoking port 302 Installation Department 1232 Upper smoking port 303 Exhaust vent 124 First cover 40 Wind direction adjustment 1241 Air curtain outlet 50 Oil box 125 Second cover 200 kitchen

[0054] 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

[0055] 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.

[0056] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0057] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution 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 this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0058] The invention provides a range hood.

[0059] Please refer to Figures 1 to 3 In an embodiment of the present invention, the range hood includes a casing 1, a purification component 20 and an air curtain 30. The casing 1 is provided with a smoke exhaust duct and a smoke inlet connected to the smoke exhaust duct. The purification component 20 is arranged in the casing 1. The purification component 20 forms a purification duct (not marked). The purification duct and the smoke exhaust duct (not marked) are independent of each other. The casing 1 is also provided with a purification air inlet 1251 and a purification air outlet 1221 connected to the purification duct. The air curtain 30 is installed on the casing 1 and connected to the purification duct. The casing 1 is provided with an air curtain outlet 1241 corresponding to the air curtain component 30. Part of the air in the purification duct passes through the air curtain component 30 and is blown out from the air curtain outlet 1241.

[0060] The purification duct and the smoke exhaust duct in the range hood of the present application are independent of each other, so that the range hood has the functions of a traditional range hood. During use, the smoke outlet is connected to an indoor installation environment such as the kitchen 200 where the range hood is located, wherein the range hood also includes a smoke outlet connected to the smoke exhaust duct and connected to the outside, and is provided with a smoke exhaust fan that drives the airflow to be sucked into the smoke exhaust duct from the smoke outlet and discharged from the smoke exhaust outlet. The smoke exhaust fan can be, for example, a centrifugal fan, an axial flow fan, etc., and the present application does not impose any restrictions on this. Based on considerations such as cost and volume, the present application can choose the smoke exhaust fan to be a centrifugal fan. During use, the range hood is installed above the stove, and most of the oil smoke generated during cooking will be sucked into the smoke exhaust duct through the smoke outlet and discharged to the outside through the smoke exhaust outlet. During the entire use process, a small amount of oil smoke may escape into the kitchen environment and cannot be completely discharged. To this end, the present application further provides a purification component 20 in the housing 1 of the range hood, so that a small amount of oil smoke that escapes to the vicinity of the range hood or to the environment of the kitchen 200 can enter the purification air duct through the purification air inlet 1251, and form fresh air through the purification and filtering action of the purification component 20, and then be discharged to the indoor environment of the kitchen 200 through the purification air outlet 1221. At the same time, since the air curtain 30 is connected to the purification air duct, part of the purified air can also pass through the action of the air curtain 30, and blow out an air curtain (or wind curtain) in front of the range hood. The air curtain can block the oil smoke during its escape process, and can also provide a barrier to separate the cook and the stove as the source of the oil smoke, so as to reduce the amount of oil smoke inhaled by the human body and ensure human health.

[0061] That is, the technical solution of the present invention is to set a purification component 20 in the casing 1 of the range hood, the purification component 20 forms a purification air duct which is independent of the smoke exhaust air duct, and the casing 1 is provided with a purification air inlet 1251 and a purification air outlet 1221 which are connected to the purification air duct. Through the function of the purification component 20, the oil smoke escaping to the kitchen 200 environment can be further removed during the process of removing oil smoke from the smoke exhaust air duct, thereby improving the environment of the kitchen 200, reducing the amount of oil smoke absorbed by the human body, and improving human health. The shell 1 is further provided with an air curtain member 30, which is connected to the purification air duct. The shell 1 is provided with an air curtain outlet 1241 corresponding to the air curtain member 30. Thus, through the action of the air curtain outlet 1241, an air curtain of purified clean airflow is formed outside the range hood. On the one hand, the air curtain can act as a barrier to reduce the escape of oil smoke in the process of leading to the exhaust air duct. Moreover, since the air curtain is formed in front of the range hood, it can further block the oil smoke from rushing to the cook in front of the range hood, which can further improve human health.

[0062] In one embodiment, please refer to Figures 3 to 6The above-mentioned purification component 20 includes a purification fan 21 and a filter 22, wherein the filter 22 may be located in front of the purification fan 21 in the direction of air flow. Driven by the purification fan 21, the air flow enters from the purification air inlet 1251, passes through the filtering effect of the filter 22, and then flows through the purification fan 21, and finally is discharged outward from the purification air outlet 1221 and the wind curtain air outlet 1241, wherein the purification fan 21 may be a centrifugal fan, an axial flow fan, a cross-flow fan, etc., and the present application does not impose any restrictions on this. Based on considerations of cost, volume, and other factors, the present application may select the purification fan 21 as a centrifugal fan. During the cooking process, edible oil and food undergo a series of chemical reactions such as oxidation, cracking, and polymerization at high temperatures, evaporating a large amount of organic smoke, of which some of the decomposed products are dispersed into the air in the form of oil mist to form oil smoke. The so-called oil smoke includes both edible oil and its products of heating decomposition or cracking, and the products of physical and chemical reactions of proteins, high molecular compounds and various condiments in food. It is a substance that contains three states: gas, liquid and solid. It is usually defined as follows: particulate matter emissions (Particulate Matter Emissions) composed of liquid and solid in oil smoke emissions are referred to as PME, and volatile organic compound emissions (Volatile Organic Compounds Emissions) are referred to as VOCs. Oil smoke is composed of the above two types of substances, among which VOCs can be considered as oil smoke odor. In order to effectively filter and remove oil smoke, the filter element 22 of the present application can adopt, for example, a HEPA filter mesh. The material of the HEPA filter mesh can include PP filter paper (polypropylene filter paper), glass fiber, PTFE filter paper (polytetrafluoroethylene filter paper), nanofiber, melt-blown polyester non-woven fabric, etc. It has the characteristics of large dust holding capacity and high filtration accuracy. The filtration efficiency of oil smoke particles can exceed 90%, and it can be processed into the required size and shape according to the needs of the machine model. It can be understood that the material selection of the filter element 22 can also be adjusted as needed, and the present application does not impose any restrictions on this.

[0063] In order to better blow the purified air to the cook, in some embodiments, the purified air outlet 1221 is located at the front of the housing 1, and the air curtain 30 and the air curtain air outlet 1241 are arranged adjacent to the air outlet. By arranging the purified air outlet 1221 at the front of the housing 1, at least part of the purified air can be directly blown to the cook located in front of the range hood, and the air curtain air outlet 1241 is arranged adjacent to the purified air outlet 1221, so that the air blown out of the purified air outlet 1221 can cooperate with the air curtain formed by blowing out through the air curtain air outlet 1241, thereby defining an area covered by clean air, so that the cook breathes in the area full of clean air, that is, the purified air outlet 1221 is located at the front of the housing 1 and the air curtain air outlet 1241 is arranged adjacent to the air outlet, so that the area covered by the airflow blown out by the two is more matched with the breathing area of ​​the cook, thereby reducing the possibility of the cook inhaling oil smoke, and improving human health.

[0064] In some embodiments, please refer to Figures 8 to 13 , the air outlet direction of the purification air outlet 1221 is adjustable. Due to the different factors such as the size of the kitchen 200 where the range hood is installed and the height of the cook, the above-mentioned area range matching the cook's breathing zone and the air flow direction that can disturb the air flow in the kitchen 200 environment will be different. Therefore, by setting the air outlet direction of the purification air outlet 1221 to be adjustable, the air outlet direction can be adjusted according to actual needs, so that better air circulation can be achieved in the kitchen 200 and the purified air can be better blown to the cook. For example, Fig.12 Taking the air circulation diagram shown as an example, when the smoke is in the area enclosed by the dotted frame, which schematically represents the kitchen 200 space, when the purification air outlet 1221 can blow out an oblique upward airflow (such as Fig. 9 , where α can be less than 90 degrees), and part of the airflow is blown forward, the airflow blown obliquely upward can effectively disturb the air in the upper area of ​​the kitchen 200 space, and under the action of gravity, the airflow sinks and flows back from the lower area of ​​the kitchen 200 space to the smoke outlet of the range hood, so that the oil smoke escaping into the kitchen 200 environment can be effectively removed, and Fig.12 and Fig.13 From the airflow direction, we can see that under the suction of the smoking port, the airflow surging upward from the lower space of the kitchen 200 environment will attract the airflow blown out by the wind curtain outlet 1241, causing the direction of the air curtain blown out by the wind curtain outlet 1241 to change to form a vortex shape. Then, directly in front of the range hood, in front of the vortex-shaped air curtain, it will define a space area full of clean air together with the airflow blown out by the above-mentioned purification outlet 1221, which is directly opposite to the human breathing zone. This can greatly reduce the possibility of human inhalation of oil smoke.

[0065] In order to achieve the adjustable air outlet direction of the purification air outlet 1221, please refer to Figures 3 to 5 In one embodiment, the range hood is movably equipped with a wind direction adjusting member 40 at the purification air outlet 1221, and the wind direction adjusting member 40 can adjust the opening of the purification air outlet 1221, so that the size of the airflow flowing out of the purification air duct through the wind curtain air outlet 1241 can be adjusted. The wind direction adjusting member 40 of the present application can be installed at the purification air outlet 1221 in the form of a grille structure, wherein both ends of the grille are rotatably connected to the purification air outlet 1221. During the wind direction adjustment process, it can be adjusted manually, or a driving motor can be provided, and the wind direction of the grille can be automatically adjusted by the driving motor in a gear transmission manner. At the same time, the wind direction adjusting member 40 of the present application is in the form of a grille, and it controls the opening of the purification air outlet 1221 to change the size of the airflow of the wind curtain air outlet 1241, so that the two are associated, so that the wind force adjustment requirements can be met through a simple structure. For example, if it is found during use that there is a lot of oil smoke escaping into the kitchen 200 environment, and the air flow in the kitchen 200 environment needs to be accelerated, the airflow blown out from the purification outlet 1221 can be larger, while the airflow blown out from the wind curtain outlet 1241 can be smaller. Or, if it is found during the cooking process that a large amount of oil smoke is suddenly generated, the air volume of the purification outlet 1221 can be reduced and the air volume of the wind curtain outlet 1241 can be increased by adjusting the wind direction adjustment member 40. This can better block the large amount of oil smoke generated by the stove from directly surging up and reaching the cooking person's breathing zone. During the adjustment process of the wind curtain outlet 1241 and the purification outlet 1221, the oil smoke extractor of the present application can also be provided with a sensor for oil smoke concentration detection. Through the oil smoke concentration information and the set control logic, the opening of the purification outlet 1221 can be automatically controlled, and the air outlet size of the wind curtain outlet 1241 can be automatically adjusted. This makes the range hood smarter and more convenient to use.

[0066] In one embodiment, at least two purification air outlets 1221 are arranged at intervals on the front side of the housing 1, and the number of purification air inlets 1251 corresponds to the number of purification air outlets 1221, and one purification air outlet 1221 is correspondingly provided with one wind curtain member 30 and one wind curtain air outlet 1241. In the scheme shown in the drawings of the present application, a purification air outlet 1221 is arranged on each of the left and right sides of the front side of the housing 1, and the number of purification components 20 is also matched with the number of purification air outlets 1221 and is provided with two. During operation, air enters through a purification air inlet 1251 and is driven by the purification component 20 to be blown out by a purification air outlet 1221. By arranging at least two purification air outlets 1221 at intervals on the front side of the housing 1, the maximum air sweeping range can be ensured. Furthermore, the present application sets a smoke exhaust duct in the middle of the housing 1, and a purification component 20 is set on each of the left and right sides of the smoke exhaust duct to form a purification duct, and a purification duct is connected to a purification air inlet 1251 and a purification air outlet 1221, so that a reasonable layout is achieved in a limited space, so that the overall smoke removal function is powerful and the structure is relatively compact. The number of purification components 20 corresponds to the number of purification air outlets 1221, so that during use, by controlling a separate purification component 20, the operation of the purification components 20 on the left and right sides of the housing 1 and the purification power during operation can be controlled as needed, so that it is more flexible to use. For example, in the case of a double stove, the purification air inlet 1251 on the left and right sides generally corresponds to a stove, so when using a stove, the purification component 20 corresponding to the stove position can be controlled separately to start, which can save energy and better meet the needs of use.

[0067] It can be understood that in other embodiments, the number of purification air inlets 1251, purification air outlets 1221, air curtain air outlets 1241, purification components 20, and air curtain components 30 in the present application can be adjusted according to needs. For example, the present application may also be provided with one, three or other numbers of purified air outlets 1221. Even if there is one purified air outlet 1221 on each side in the attached figure, one wind curtain piece 30 and one wind curtain air outlet 1241 may be provided. One wind curtain piece 30 may be provided and two wind curtain air outlets 1241 may be provided. Alternatively, when two purified air outlets 1221 are provided at intervals on the left and right, one wind curtain piece 30 and one wind curtain air outlet 1241 may be provided. The wind curtain air outlet 1241 may extend continuously from one purified air outlet 1221 to another purified air outlet 1221. In addition, the purification component 20 may also be provided with one and have two sub-air ducts to respectively connect one purified air outlet 1221. Such a configuration may reduce the manufacturing cost. As for other combination configurations, they are not listed one by one.

[0068] The wind curtain outlet 1241 of the present application extends in the lateral width direction of the housing 1. When the number of the purification outlet 1221 and the wind curtain outlet 1241 is set, the length of the wind curtain outlet 1241 extending in the lateral direction of the housing 1 is greater than or equal to the length of the purification outlet 1221 extending in the lateral direction of the housing 1. And as a preferred method, the length of the wind curtain outlet 1241 extending in the lateral direction of the housing 1 is greater than half of the lateral dimension of the housing 1. This arrangement can make the width of the airflow blown out by the wind curtain outlet 1241 effectively cover the area range of the front side of the range hood, so that the width of the air curtain generated by it is sufficient to effectively block the escape of oil smoke and reduce the possibility of human inhalation of oil smoke.

[0069] In some embodiments, please refer again to Figure 3 , Figure 5 as well as Figure 6 and Figure 7 The wind curtain member 30 includes an elongated wind guide tube 301, the wind guide tube 301 is provided with an air inlet connected to the purification air duct, the wind guide tube 301 is provided with an exhaust port 303 extending in the length direction thereof, the exhaust port 303 is correspondingly connected to the wind curtain outlet 1241, wherein the exhaust port 303 and the wind curtain outlet 1241 are both in the shape of long strips. The wind curtain member 30 of this embodiment can be made of plastic or metal. In one embodiment, the cross-sectional shape of the wind curtain member 30 can be a trapezoid, and of course it can also be an ellipse, a rectangle, etc., which is not limited in this application. The wind curtain member 30 is a structure of an elongated wind guide tube 301. Through the function of the wind guide tube 301, it can be helpful to form a wind curtain with a large coverage area in front of the range hood, thereby effectively preventing the escape of oil smoke and preventing the oil smoke from rushing to the cook. Furthermore, the air curtain member 30 further includes a mounting portion 302 connected to the air guide tube 301, and the air curtain member 30 is detachably connected to the housing 1 via the mounting portion 302. In this embodiment, the mounting portion 302 may be a connecting ear structure, a threaded hole is provided on the connecting ear, and the mounting portion 302 is screwed to the housing 1. Of course, the mounting portion 302 and the housing 1 may also be detachably fixed in a manner such as a snap-on connection pin connection, and the detachable connection makes later disassembly and maintenance more convenient.

[0070] The housing 1 of the present application includes a fan cover 11 and a smoke collecting cover 12. The smoke collecting cover 12 is connected to the bottom of the fan cover 11 and is located at the bottom of the housing 1 as a whole. The smoke collecting cover 12 is closer to the stove. The above-mentioned purification component 20 and the air curtain 30 are both located in the smoke collecting cover 12, wherein the purification air outlet 1221, the air curtain air outlet 1241, the purification air inlet 1251 and the smoke inlet are sequentially opened in the height direction of the smoke collecting cover 12. In this embodiment, the purification air outlet 1221, the air curtain air outlet 1241 and the smoke inlet are sequentially opened in the height direction of the smoke collecting cover 12. This arrangement allows most of the oil smoke to be first sucked into the smoke inlet and discharged through the smoke exhaust duct, and a small amount of oil smoke that is not absorbed is sucked in through the purification air inlet 1251 above, and then filtered through the purification component 20. In this way, the power distribution during the smoke removal process is reasonable, and the purification component 20 will not inhale too much oil smoke, which shortens the service life of the filter element 22 and makes it too frequently replaced, increasing the use cost.

[0071] The smoke hood 12 includes a main hood body 121 with a front opening, a front panel 122 connected to the main hood body 121 and spliced ​​in the front opening, and a lower cover plate 123, wherein the lower cover plate 123 is located below the front panel 122, wherein the connection method of the front panel 122 and the lower cover plate 123 with the main hood body 121 can be a detachable fixed connection method such as screw connection, snap connection, etc., or a non-detachable fixed connection method such as welding, riveting, etc., for the sake of disassembly and maintenance, the present application preferably uses a detachable fixed connection method for the connection method of the front panel 122 and the lower cover plate 123 with the main hood body 121. A purification air outlet 1221 is provided on the front panel 122, and the lower cover plate 123 includes a first cover plate 124 connected to the front panel 122, the first cover plate 124 is inclined toward the rear side and is arranged at an acute angle to the horizontal plane, wherein the air curtain air outlet 1241 is provided on the first cover plate 124.

[0072] The main cover body 121 of the present application includes a rear wall plate, an upper wall plate connected to the upper side of the rear wall plate, and side wall plates connected to the opposite sides of the rear wall plate. An oil receiving box 50 is installed at the lower end of the rear wall plate. The front panel 122 and the lower cover plate 123 are sealed in front of the rear wall plate, and the opposite sides of the front panel 122 and the lower cover plate 123 are respectively connected to the side wall plates, the upper side of the front panel 122 is connected to the upper wall plate, and the lower side of the front panel 122 is connected to the lower cover plate 123. In this embodiment, the first cover plate 124 faces the rear side and is inclined from top to bottom, and the first cover plate 124 is set at an acute angle to the horizontal plane, so that the air curtain outlet 124 opened thereon 1 blows out an air curtain toward the front and downward. Combined with the above content, since a purified air inlet 1251 and a smoke outlet are also provided below the air curtain outlet 1241, the airflow blowing out of the air curtain toward the front and obliquely downward through the action of the air curtain member 30 will be attracted by the purified air inlet 1251 and the smoke outlet, and change direction and flow toward the purified air inlet 1251 and the smoke outlet, so that an airflow vortex will be formed on the front side of the range hood. The formation of the airflow vortex is equivalent to a favorable barrier that can effectively prevent the oil smoke from escaping or rushing toward the cook during the upward flow, thereby reducing the possibility of human body inhaling oil smoke.

[0073] Furthermore, the lower cover plate 123 further includes a second cover plate 125 and a third cover plate 126. The first cover plate 124, the second cover plate 125 and the third cover plate 126 are sequentially connected from top to bottom and are arranged at an angle between each other. The purified air inlet 1251 is provided on the second cover plate 125. The first cover plate 124, the second cover plate 125 and the third cover plate 126 gradually form a tendency to bend toward the rear side of the range hood. The above-mentioned structural arrangement of this embodiment has a reasonable layout and is more in line with the fluid mechanics characteristics. At the same time, the plate body arrangement of the above-mentioned three-section bending structure of the lower cover plate 123 is also conducive to the condensation of grease in the oil smoke when the oil smoke passes through the lower cover plate 123, and is gathered into the oil receiving box 50 by gravity.

[0074] In some embodiments, the smoke outlet includes an upper smoke outlet 1232 opened on the second cover plate 125 and a lower smoke outlet 1231 formed by the third cover plate 126 and the main cover body 121. The upper and lower smoke outlets are arranged in a reasonable layout. The lower smoke outlet 1231 located at the bottom is closer to the stove and sucks most of the oil smoke into the smoke exhaust duct and discharges it. A small amount of oil smoke surging upward is mainly sucked into the smoke exhaust duct again through the upper smoke outlet 1232, and the oil smoke that does not enter the smoke exhaust duct enters the purification duct through the purification air inlet 1251 for filtration, so that the oil smoke can be effectively removed through multiple suction effects, and the purification component 20 will not be overloaded.

[0075] In the scheme described in the above content, the purification air outlet 1221, the wind curtain air outlet 1241, the purification air inlet 1251 and the smoking port are all arranged on the front side of the smoke hood 12. It can be understood that the positions of the purification air outlet 1221, the wind curtain air outlet 1241, the purification air inlet 1251 and the smoking port can also be adjusted as needed. For example, the purification air inlet 1251 can also be arranged on the side of the smoke hood 12 or the top surface of the smoke hood 12, etc., and the present application does not impose any restrictions on this.

[0076] Optionally, the smoke exhaust fan in the smoke exhaust duct of the present application and the purification fan 21 in the purification component 20 are connected to the same controller, that is, the range hood controls the smoke exhaust duct and the purification duct through the same controller; the controller is usually set on the fan cover 11. In other embodiments, the range hood may also be provided with two different controllers 3 to respectively control the smoke exhaust fan and the purification fan 21.

[0077] Optionally, the purification fan 21 shares a control switch, so that when the smoke exhaust fan is turned on by the control switch to work, the purification component 20 will be automatically turned on to work at the same time, that is, the smoke exhaust fan and the purification component 20 can be turned on with one button to work together. The control switch is usually electrically connected to the controller to realize the control of starting and stopping. When sharing a control switch, the control switch is usually set on the smoke hood 12.

[0078] However, the present design is not limited thereto. In other embodiments, the smoke exhaust fan and the purification assembly 20 may also use different control switches to realize independent start and stop control of the smoke exhaust fan and the purification assembly 20, so that the user can use the functions of the smoke exhaust fan and the purification assembly 20 more flexibly. When different control switches are used, the two control switches can be both set on the smoke hood 12; usually, a control panel is set on the front of the smoke hood 12. When the smoke exhaust fan and the purification assembly 20 share a control switch, the control switch is usually integrated on the control panel, that is, the control switch is located on the front of the smoke hood 12, which is more convenient for the user to operate.

[0079] 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: A casing, wherein the casing is provided with a smoke exhaust duct and a smoke inlet connected to the smoke exhaust duct; a purification component, disposed in the housing, the purification component forming a purification air duct, the purification air duct and the smoke exhaust air duct being independent of each other, the housing being provided with a purification air inlet and a purification air outlet communicating with the purification air duct; and An air curtain member is installed on the housing and communicated with the purification air duct. The housing is provided with an air curtain outlet corresponding to the air curtain member, and part of the air in the purification air duct is blown out from the air curtain outlet after passing through the air curtain member. The casing includes a smoke collecting hood located at the bottom thereof, and the purification assembly and the air curtain are located in the smoke collecting hood; the smoke collecting hood includes a main hood body with a front opening, a front panel connected to the main hood body and spliced ​​in the front opening, and a lower cover plate, the lower cover plate is located below the front panel, the front panel is provided with the purification air outlet, the lower cover plate includes a first cover plate connected to the front panel, the first cover plate is inclined toward the rear side and is arranged at an acute angle to the horizontal plane, wherein the air curtain air outlet is arranged on the first cover plate; the purification air inlet and the smoking port are arranged below the air curtain air outlet; The range hood is movably provided with a wind direction adjusting member at the purification air outlet, and the wind direction adjusting member can adjust the opening of the purification air outlet, so that the size of the airflow flowing out of the purification air duct through the air curtain outlet can be adjusted.

2. The range hood according to claim 1, characterized in that: The purified air outlet is located at the front of the housing, and the air curtain is arranged adjacent to the purified air outlet.

3. The range hood according to claim 2, characterized in that: The air outlet direction of the purified air outlet is adjustable.

4. The range hood according to claim 2, characterized in that: At least two purification air outlets are arranged at intervals on the front side of the casing, and one purification air outlet is correspondingly arranged with one wind curtain air outlet.

5. The range hood according to claim 2, characterized in that: The air curtain outlet extends in a transverse width direction of the housing.

6. The range hood according to claim 5, characterized in that: The length of the air curtain outlet extending in the transverse direction of the casing is greater than half of the transverse dimension of the casing.

7. The range hood according to any one of claims 2 to 6, characterized in that: The purification air outlet, the air curtain air outlet, the purification air inlet and the smoke inlet are sequentially opened in the height direction of the smoke collecting hood.

8. The range hood according to claim 1, characterized in that: The lower cover plate also includes a second cover plate and a third cover plate. The first cover plate, the second cover plate and the third cover plate are sequentially connected from top to bottom and are arranged at an angle between each other. The purified air inlet is opened on the second cover plate.

9. The range hood according to claim 8, characterized in that: The inhalation opening comprises an upper inhalation opening opened on the second cover plate, and a lower inhalation opening formed by the cooperation of the third cover plate and the main cover body.

10. The range hood according to claim 9, characterized in that: The number of the purified air inlets corresponds to the number of the purified air outlets and at least two are provided, and the upper smoking port is located between two adjacent purified air inlets.

11. The range hood according to claim 10, characterized in that: A purification air duct in the purification component is connected to a purification air inlet and a purification air outlet, and the purification component is arranged on opposite sides of the smoke exhaust air duct.

12. The range hood according to claim 1, characterized in that: The wind curtain member includes an elongated air guide tube, the air guide tube is provided with an air inlet connected to the purification air duct, the air guide tube is provided with an exhaust port extending in its length direction, the exhaust port is correspondingly connected to the air outlet of the wind curtain, wherein the exhaust port and the air outlet of the wind curtain are both in the shape of elongated strips.

13. The range hood according to claim 12, characterized in that: The air curtain piece also includes a mounting portion connected to the air guide tube, and the air curtain piece is detachably connected to the smoke collecting hood via the mounting portion.

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