Air curtain range hood

Abstract

The present invention discloses an air curtain range hood, comprising an air curtain device that forms an air curtain. The air curtain's air outlet size and / or air outlet position are adjustable, thereby adjusting the air curtain's oil fume shielding range and / or air curtain distribution. The air curtain range hood described in the present invention features a design for the air curtain's generation position, allowing air outlets to be positioned at multiple locations along the range hood. The air outlets are further divided into air outlet units, with multiple air outlet units belonging to the same air outlet being arranged continuously, enabling the range hood to shield oil fumes from different locations in multiple directions.

Description

Technical Field

[0001] The present invention belongs to the field of kitchen air purification equipment, and in particular relates to an air curtain range hood. Background Art

[0002] Existing kitchen purification equipment often relies on air flow to improve the kitchen's air quality. Currently, most of these devices are range hoods and related improvements, available in a variety of models, including double-tube, single-tube, hood-type, top-draft, and bottom-draft. However, these range hoods are passive air extraction devices, with their intake ports located a certain distance from the cooking utensils that generate the fumes. Therefore, they cannot completely remove the kinetic energy of the instantaneous cooking fumes. To address this issue, kitchen purification equipment manufacturers have often improved the range hood's height and operating power, resulting in improved fume extraction. However, this still fails to address the issue of fume escaping from the surrounding cooking utensils. Furthermore, the problem of fume escape cannot be addressed by increasing the range hood's smoke trapping area to contain rising fumes below the hood, or by increasing the main motor power to enhance exhaust efficiency through increased suction. Therefore, effectively preventing fume escape has become a pressing issue. Consumers are increasingly demanding higher performance from kitchen air purification equipment, and high suction power has become a major goal for major manufacturers. However, current range hoods still struggle to address issues such as incomplete extraction and fume overflow. During the cooking process, a small amount of fume will always escape from the front of the machine, directly attacking the cook's clothes, hair, and face. This not only harms facial skin but, if inhaled for a long time, can also induce respiratory diseases, directly affecting the user's health. Therefore, to address the issue of fume escape, existing range hoods often feature an air curtain device to isolate the user from escaping fume. However, in actual use, range hoods face a more complex operating environment, especially in multi-burner environments, such as restaurant kitchens. The larger the space the range hood is in, the more pronounced the fume diffusion phenomenon is. Furthermore, the different usage conditions of multiple burners result in varying degrees of fume flow in different work areas, increasing the difficulty of fume shielding.

[0003] In view of this, the present invention is proposed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide an air curtain range hood. The air curtain is designed so that the air outlets are arranged at multiple locations along the range hood. The air outlets are further divided into air outlet units. Multiple air outlet units belonging to the same air outlet are arranged continuously, so that the range hood can shield oil fumes from multiple directions. The oil fumes shielded are not only those generated by the corresponding stove, but also those generated by other nearby stoves.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] An air curtain range hood comprises an air curtain device for forming an air curtain, wherein the air outlet size and / or air outlet position of the air curtain are adjustable, thereby adjusting the oil fume shielding range of the air curtain and / or the distribution position of the air curtain.

[0007] The present invention is further configured as follows: the air outlet comprises at least two air outlet units, and the at least two air outlet units constitute an air outlet range of the air outlet;

[0008] Preferably, the air outlet unit can independently adjust its working state;

[0009] Preferably, the number of the air outlet is at least one.

[0010] The present invention is further configured as follows: the air curtain device includes a fan device for providing power for generating the air curtain airflow, and the fan device is provided in a one-to-one correspondence with the air outlet;

[0011] Preferably, the fan device is arranged in the air storage part.

[0012] The present invention is further configured such that: the air curtain device includes a fan device that provides power for generating the air curtain airflow, and the fan device is arranged corresponding to the multiple air outlets of the air curtain device.

[0013] The present invention is further configured as follows: the air storage portion is a through annular cavity / a broken line cavity, and the air storage portion is arranged along the circumference of the range hood.

[0014] The present invention is further configured such that: the air curtain device includes an adjusting unit for controlling the working state of the air outlet unit, wherein the adjusting unit can turn the air outlet unit on and off and / or adjust the air volume and / or wind direction by changing its relative position with the air outlet unit;

[0015] Preferably, the air curtain device includes an adjusting unit for controlling the working state of the air outlet unit by changing the relative position with the air outlet unit;

[0016] Preferably, the regulating unit and the air outlet unit are arranged in a one-to-one correspondence.

[0017] The present invention is further configured as follows: the air curtain device includes a fan device for providing power for generating the air curtain airflow, and at least part of the power for the range hood to absorb oil smoke is provided by the fan device;

[0018] Preferably, the air curtain device includes a fan device that provides power for generating the air curtain airflow and provides power for the range hood to absorb oil smoke.

[0019] The present invention is further configured such that the air intake of the range hood is communicated with the air duct of the air curtain device, and an air flow for absorbing oil fumes is generated under the drive of the air curtain fan.

[0020] The present invention is further configured as follows: the air curtain device includes a fan cavity for accommodating the fan device, the fan cavity is connected to the air storage portion via an air inlet portion and a guide portion which are sequentially connected and form a through-cavity body inside, and the air inlet portion is in communication with the fan cavity;

[0021] Preferably, at least a portion of the air inlet is disposed in the fan cavity;

[0022] Preferably, the air inlet of the range hood is connected to the fan cavity;

[0023] Preferably, the opening of the air inlet portion adjacent to one end of the fan cavity is arranged to face the direction of the airflow in the fan cavity.

[0024] The present invention is further configured such that: the air inlet portion and the guide portion are connected via a transition portion, the axis of the air inlet portion and / or the guide portion mainly extends in a straight line direction, and the transition portion has a certain bending angle, thereby changing the airflow direction in the air curtain device;

[0025] Preferably, the transition portion is in the shape of a pipe;

[0026] Preferably, the angle between the extending direction of the guide portion along the direction of the internal airflow and the air outlet direction of the air curtain device is in the range of 90° to 180°;

[0027] Preferably, the air inlet portion, the transition portion and the guide portion are integrally arranged.

[0028] The present invention is further configured such that: at least a portion of the air duct of the air curtain device is formed by the smoke collecting chamber cover and the outer shell of the air curtain range hood;

[0029] Preferably, the components of the cavity inside the air storage part include a smoke collecting cavity cover plate surrounding the smoke collecting cavity, a shell component connected to the smoke collecting cavity cover plate around the periphery thereof, and a sealing member arranged opposite to the smoke collecting cavity cover plate and connected to the shell component;

[0030] Preferably, the number of the housing member and / or the smoke collecting chamber cover and / or the closure member is at least one;

[0031] Preferably, the guide portion passes through the closing member / smoke collecting chamber cover plate / shell component and communicates with the cavity inside the air storage portion.

[0032] The present invention further introduces an air curtain range hood, comprising:

[0033] An air curtain device, used to form an air curtain, comprising at least two air outlet units arranged at different positions and capable of independently adjusting / controlling the working state;

[0034] The gas condition acquisition device controls the working state of the air curtain device and / or prompts the gas condition of the surrounding environment and / or prompts operation suggestions according to the gas condition in the surrounding environment of the air curtain range hood.

[0035] The present invention is further configured such that: the gas condition acquisition device acquires gas conditions at different locations around the range hood, and controls the working state of the air outlet unit according to the gas conditions;

[0036] Preferably, the working state of the air outlet unit includes: on, off and / or air volume adjustment and / or air direction adjustment;

[0037] Preferably, when the corresponding value of the gas condition acquired by the gas condition acquisition device exceeds the corresponding threshold value, the corresponding air outlet unit is controlled to be turned on and / or the air volume and / or wind direction are adjusted;

[0038] Preferably, there are multiple gas condition acquisition devices, the data acquisition positions of the multiple gas condition acquisition devices are different, and the multiple gas condition acquisition devices are arranged in a one-to-one correspondence with the air outlet units.

[0039] The present invention is further configured as follows: at least two adjacent air outlet units form an air outlet, the air outlet is the outlet of the air curtain, and the structure thereof is continuous;

[0040] Preferably, the number of the air outlets is at least two;

[0041] Preferably, the acquisition method includes detection.

[0042] The present invention is further configured as follows: the gas condition acquisition device acquires conditions of different gas components respectively;

[0043] Preferably, the gas condition acquisition device includes an oil fume acquisition module for acquiring oil fume content and / or a moisture acquisition module for acquiring moisture content;

[0044] Preferably, the gas condition acquisition device has a plurality of oil fume acquisition modules and / or moisture acquisition modules, and the plurality of oil fume acquisition modules and / or moisture acquisition modules are arranged at intervals;

[0045] Preferably, when the data acquired by the oil smoke acquisition module exceeds the corresponding oil smoke threshold, the air curtain device corresponding to the oil smoke acquisition module is turned on. When the data acquired by the oil smoke acquisition module does not exceed the corresponding oil smoke threshold, it is further determined whether the value acquired by the moisture acquisition module exceeds the corresponding oil smoke threshold;

[0046] Preferably, the oil smoke threshold value is greater than or equal to the moisture threshold value.

[0047] The present invention is further configured as follows: there are multiple gas condition acquisition devices, the data acquisition positions of the multiple gas condition acquisition devices are different, and the multiple gas condition acquisition devices are arranged in a one-to-one correspondence with the air outlets;

[0048] Preferably, the oil smoke threshold and / or moisture threshold are divided into multiple levels with different value ranges, and the range hood turns on the air outlet unit corresponding to the threshold level corresponding to the data obtained by the gas condition acquisition device.

[0049] The present invention is further configured such that: the gas condition acquisition device judges the validity of the gas condition of the current stage it acquires; when the gas condition it acquires is invalid, it controls the working state of the air curtain device and / or prompts the gas condition of the surrounding environment and / or prompts operation suggestions based on the gas condition of the previous stage.

[0050] The present invention is further configured such that: the gas condition acquisition device uses the stability of the gas condition acquired by it as one of the criteria for judging whether it is effective;

[0051] Preferably, when the fluctuation of the gas condition at the current stage is within the corresponding stability threshold range, it is judged as valid data, otherwise it is judged as invalid data.

[0052] The present invention is further configured such that: the fluctuation condition includes the degree of deviation of the gas condition from historical data;

[0053] Preferably, when the fluctuation exceeds a corresponding historical data deviation threshold, it is determined to be invalid data.

[0054] The present invention is further configured such that: the fluctuation condition includes the accumulated time for which the gas condition exceeds its standard value;

[0055] Preferably, the standard value ranges from 60% to 90% of the average value / maximum value of the working area status data.

[0056] The present invention is further configured such that: the air curtain device includes a fan device that provides power for generating the air curtain airflow, and at least part of the power for the range hood to absorb oil smoke is provided by the fan device.

[0057] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0058] 1. The air curtain range hood described in this invention utilizes a design that positions the air curtain so that air outlets are located at multiple locations along the range hood. The air outlets are further divided into air outlet units. Multiple air outlet units belonging to the same air outlet are arranged continuously, enabling the range hood to shield oil fumes from multiple directions. The oil fumes shielded not only come from the corresponding stove, but also from other nearby stoves. The air outlets can be continuous strip-shaped holes, and the air outlet units can divide the air outlet into multiple units.

[0059] 2. The air curtain range hood described in this invention utilizes a design that optimizes the power source of the air curtain device. Multiple fan devices can be provided to generate the air curtain airflow, each corresponding to an air outlet. When the corresponding air outlet needs to be opened, the corresponding fan device is activated to ensure the supply of air curtain airflow.

[0060] 3. With the air curtain range hood introduced in the present invention, multiple air outlets can share a single fan unit. The air ducts of the multiple air outlets are connected and form an air storage unit. When the fan unit is running, it can simultaneously provide air curtain airflow to the multiple air outlets. The air outlets can be set in a flexible position.

[0061] 4. With the air curtain range hood introduced in the present invention, the air outlet unit is controlled one-to-one by the regulating unit. The air curtain is only opened at the location where the air curtain is required, and the air curtain is closed at the location where the air curtain is not required.

[0062] 5. The air curtain range hood introduced in this invention further designs the coordination between the air curtain device and the fan device, so that the air duct of the air curtain device is connected to the air duct of the fan device, and the fan device provides power for extracting oil smoke, thus simplifying the power mechanism of the equipment.

[0063] 6. The air curtain range hood introduced in this invention improves the structure of the air curtain device by designing the coordination between the air curtain device and the air intake. The air duct of the air curtain device is composed of multiple continuous cavities, each of which performs different functions. This ensures that the air curtain airflow flows smoothly within the device while also being able to change direction within the device.

[0064] 7. With the air curtain range hood introduced in the present invention, the direction of the air inlet of the air inlet portion is designed so that the gas exhausted by the fan device can be pushed into the air curtain device more efficiently, avoiding the obstruction of the airflow by the structure of the air curtain device itself, which causes the airflow to lose its flow performance.

[0065] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0067] Figure 1 This is a cross-sectional view of the structure of an air curtain range hood in an embodiment of the present invention as viewed from the left;

[0068] Figure 2 It is a schematic diagram of the structure of an air curtain range hood in an embodiment of the present invention when viewed from above.

[0069] In the figure: 10. Air curtain range hood; 1. Outer shell; 11. Shell member; 21. Air inlet of air curtain device; 23. Air outlet of air curtain device; 24. Air inlet portion; 25. Transition portion; 26. Guide portion; 27. Air storage portion; 31. Fan; 32. Air duct of fan device; 33. Air outlet of fan device; 4. Smoke collecting chamber cover; 5. Closing member; 6. Debris removal unit.

[0070] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0071] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0072] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0073] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0074] like Figures 1 to 2 As shown, the air curtain range hood introduced in the present invention includes an air curtain device that forms an air curtain, and the air curtain device includes an air storage portion with a cavity structure, the air storage portion is arranged along at least one side of the range hood, and at least one air outlet is provided on the side of the air storage portion adjacent to the outside of the range hood, and each of the air outlets includes at least one air outlet unit that can independently adjust / control the working state. Through the air curtain range hood introduced in the present invention, the generation position of the air curtain is designed so that the air outlet is arranged at multiple positions along the range hood, and the air outlet is further divided into air outlet units. Multiple air outlet units belonging to the same air outlet are arranged continuously, so that the range hood can shield oil smoke in multiple directions. The oil smoke it shields is not only the oil smoke generated by the corresponding stove, but also the oil smoke generated by other nearby stoves. The air outlet can be a continuous strip hole structure, and the air outlet unit can divide the air outlet into multiple units.

[0075] Example 1

[0076] The air curtain device of the air curtain range hood described in this embodiment includes a fan device that provides power for generating the air curtain airflow. Each fan device is provided in a one-to-one correspondence with each air outlet. The power source of the air curtain device has been designed. Multiple fan devices can be provided to generate the air curtain airflow, each corresponding to an air outlet. When the corresponding air outlet needs to be opened, the corresponding fan device is activated to ensure the supply of the air curtain airflow. The fan device is located in the air storage unit.

[0077] Example 2

[0078] The air curtain range hood described in this embodiment differs from the previous embodiment in that the air curtain device includes a fan device that provides power for generating the air curtain airflow, and the fan device is provided corresponding to the multiple air outlets of the air curtain device. Multiple air outlets can share a single fan device, so that the air ducts of the multiple air outlets are connected and form an air storage unit. When the fan device is operating, it can simultaneously provide air curtain airflow to multiple air outlets. The air outlets can be flexibly positioned. Even if there is insufficient space for an air curtain device, air outlets can still be installed.

[0079] Example 3

[0080] The difference between the air curtain range hood described in this embodiment and the above embodiment is that the air storage part is a through annular cavity / broken line cavity, and the air storage part is arranged along the circumference of the range hood, close to the lower side of the range hood. The air curtain device includes an adjustment unit for controlling the working state of the air outlet unit, and the adjustment unit realizes the opening and closing and / or air volume adjustment and / or wind direction adjustment of the air outlet unit by changing its relative position with the air outlet unit. The adjustment unit is arranged in a one-to-one correspondence with the air outlet unit. The air outlet unit is controlled one-to-one by the adjustment unit. It is only opened at the position where the air curtain needs to be generated, and then the air curtain is generated. It is closed at the position where the air curtain does not need to be generated.

[0081] Example 4

[0082] like Figure 1 As shown, the difference between the air curtain range hood of this embodiment and the above-mentioned embodiment is that at least part of the power of the air flow required for the air curtain device to form the air curtain is provided by the fan device, and the air curtain device is arranged in the cavity formed by the outer shell 1 of the air curtain range hood. The air curtain device is a structure with a through cavity inside. Through the air curtain range hood introduced in this embodiment, the air flow source of the air curtain device is improved, so that at least part of the gas exhausted by the range hood is introduced into the air curtain device to become the air flow source of the air curtain. The gas entering the air curtain device itself has kinetic energy, rather than simply relying on the kinetic energy provided by the air curtain device, which significantly reduces the energy required to form the air curtain airflow, which is beneficial to energy saving and environmental protection. Furthermore, the air curtain range hood introduced in this embodiment arranges the air curtain device inside the range hood, which can effectively hide the air curtain device and avoid affecting the appearance of the range hood. Moreover, this design can shorten the distance between the air curtain device and the fan device, ensuring that the airflow power generated by the fan device can efficiently deliver the airflow into the air curtain device and discharge it from the air outlet of the air curtain device, thereby realizing the function of the air curtain before the air flow performance is significantly reduced.

[0083] Furthermore, in the air curtain range hood described in this embodiment, the air inlet 21 of the air inlet portion is connected to the fan chamber 32, and is arranged to face the direction of the airflow within the air duct 32 of the fan device. Preferably, the angle between the orientation of the air inlet 21 of the air inlet portion and the direction of the airflow within the fan chamber 32 is in the range of 90° to 180°. The air curtain range hood described in this embodiment has a designed orientation of the air inlet portion, so that the gas exhausted by the fan device can be more efficiently pushed into the air curtain device, avoiding the airflow being blocked by the air curtain device's own structure, which would cause the airflow to lose its flow performance.

[0084] Example 5

[0085] like Figure 1As shown, the air curtain range hood of this embodiment differs from the previous embodiment in that the air inlet 21 of the air inlet portion is connected to a position adjacent to the fan unit's air outlet 33. Because the airflow kinetic energy is greatest at the fan unit's air outlet 33, the airflow performance at this location is also the most stable. Furthermore, given the range hood's internal purification device, the airflow at this location is fully purified, containing very little oil smoke, making it more suitable for use as an air curtain.

[0086] Furthermore, the air curtain device described in this embodiment includes an internally connected air inlet portion 24 and a guide portion 26. The air inlet portion 24 is connected to the fan device, allowing airflow within the fan device to be directed into the air curtain device. At least a portion of the air inlet portion 24 is disposed within the fan cavity 32. Preferably, the air inlet portion 24 and / or the guide portion 26 are primarily duct-shaped structures.

[0087] Furthermore, in the range hood curtain described in this embodiment, the air inlet portion 24 and the guide portion 26 are connected by a transition portion 25. The axis of the air inlet portion 24 and / or the guide portion 26 extends primarily in a straight line, and the transition portion 25 has a certain bend angle, thereby changing the direction of airflow within the air curtain device. Preferably, the angle between the extension direction of the guide portion 26 along the internal airflow direction and the air outlet direction of the air curtain device ranges from 90° to 180°. Preferably, the transition portion 25 is duct-shaped; the air inlet portion 24, transition portion 25, and guide portion 26 are integrally arranged.

[0088] The air curtain range hood described in this embodiment has a redesigned structure for the air curtain device. The multi-segment design allows each segment to perform its function while ensuring compatibility with other segments. The main function of the air inlet section is to effectively separate part of the airflow within the fan device. Its extension direction is set along the direction of the airflow within the fan device. The separated airflow can enter the air curtain device without changing the flow direction, significantly reducing the resistance of the airflow entering the air curtain device. The design of the guide section and transition section can effectively change the flow direction of the airflow, and the guide section is preferably a tubular structure extending in a straight line, which can reduce the airflow resistance in the guide section.

[0089] Example 6

[0090] like Figure 1 As shown, the difference between the air curtain range hood of this embodiment and the above embodiment is that the air curtain device includes an air storage part 27 for adjusting the internal gas distribution thereof, the air outlet 23 of the air curtain device is provided on the air storage part 27, and the air storage part 27 constitutes a part of the air duct of the air curtain device.

[0091] Furthermore, the air curtain range hood described in this embodiment has an annular cavity inside the air storage portion 27, and the annular cavity of the air storage portion 27 surrounds the air curtain range hood suction port ( Figure 1The lower middle part of the structure shown in the figure is set.

[0092] The air curtain range hood described in this embodiment incorporates an air storage unit. The airflow drawn from the fan assembly is directed into the air storage unit, redistributing the airflow so that it is discharged from the air curtain assembly at the appropriate location. The air storage unit is designed as an annular structure. By positioning the range hood's air intake at the center of the annular structure, the air curtain assembly's air outlet can be positioned at multiple locations around the intake. This allows for flexible placement of the air curtain assembly's air outlet, allowing it to be installed even in relatively narrow or complex locations.

[0093] Furthermore, in the curtain range hood introduced in this embodiment, the components of the cavity inside the air storage part 27 include a smoke collecting chamber cover plate 4 that encloses the smoke collecting chamber, a shell member 11 connected to the smoke collecting chamber cover plate 4 on all sides, and a closure member 5 that is arranged relative to the smoke collecting chamber cover plate 4 and connected to the shell member 11. The number of shell members 11 and / or smoke collecting chamber cover plate 4 and / or closure member 5 is at least one. Preferably, the guide portion 26 passes through the closure member 5 / smoke collecting chamber cover plate 4 / shell member 11 and is connected to the cavity inside the air storage part 27. The air storage part 27 is designed to be formed by the smoke collecting chamber cover plate 4 of the equipment and a part of the outer shell partition, which effectively utilizes the space of the equipment and gives the equipment components more functions, avoiding the setting of the air curtain device to increase the structural burden of the equipment.

[0094] Furthermore, the air curtain range hood described in this embodiment features an adjustable airflow direction at the air curtain device's air outlet 23. An air deflector (not shown) is positioned at the air curtain device's air outlet 23, and the deflector's extension direction is adjustable. Preferably, the air curtain device has multiple air outlets 23, each of which is arranged around the smoke collection chamber of the air curtain range hood.

[0095] Example 7

[0096] like Figure 1 As shown, the air curtain range hood of this embodiment differs from the above-mentioned embodiments in that the air curtain device includes a decontamination unit 6 for purifying the air in its internal air duct. Preferably, the decontamination unit 6 is connected to the guide portion 26. The addition of the decontamination unit further ensures the cleanliness of the airflow through the air curtain.

[0097] Furthermore, in the range hood curtain introduced in this embodiment, the impurity removal unit 6 is connected to the side of the guide portion 26 close to the air storage portion 27. The impurity removal unit is kept away from the air inlet of the air inlet portion to a certain extent, so as to avoid the impurity removal unit from hindering the air flow entering the air curtain device.

[0098] Furthermore, the impurity removal unit of the range hood curtain introduced in this embodiment includes an impurity removal unit switch (not shown in the figure) for controlling the working state of the impurity removal unit. The impurity removal unit switch controls whether the impurity removal unit is connected to the air duct of the air curtain device. When the impurity removal unit switch is triggered to the on state, the impurity removal unit is connected to the air duct of the air curtain device to realize the impurity removal function. When the impurity removal unit switch is triggered to the off state, the impurity removal unit is connected out of the air duct of the air curtain device. The impurity removal unit is connected to the air duct to reduce the air flow resistance in the air curtain device and increase the air flow of the air curtain device.

[0099] Furthermore, in the curtain range hood introduced in this embodiment, the impurity removal unit switch controls the degree to which the impurity removal unit is connected to the air duct of the air curtain device. The impurity removal unit in this embodiment includes a multi-layer structure, and each layer can achieve a certain impurity removal function. Preferably, the structures of the multi-layer impurity removal units are the same, and the number of layers of impurity removal units connected to the air duct of the air curtain device can be controlled by the impurity removal unit switch. When the multi-layer impurity removal units are connected to the air duct, the impurity removal function is achieved together to ensure the impurity removal effect. When the number of layers of impurity removal units connected to the air duct is small, it can ensure that the fluidity loss of the airflow is minimized. The impurity removal unit can be a device with a filtering function.

[0100] Furthermore, in the range hood curtain described in this embodiment, the impurity removal unit can be a deflectable sheet structure disposed within the air duct of the air curtain device. When the impurity removal function is being performed, the sheet structure flips to form a certain angle (preferably perpendicular) with the airflow direction; when the impurity removal function is not required, the sheet structure flips to be parallel to the airflow direction.

[0101] Example 8

[0102] The difference between the air curtain range hood of this embodiment and the above embodiment is that the air curtain device includes a switch part for controlling the opening and closing of the internal air duct. With the addition of the switch part for controlling the opening and closing of the air duct, the user can choose whether to have the air curtain or not.

[0103] Furthermore, the curtain range hood introduced in this embodiment has a switch portion arranged on the guide portion. Preferably, the switch portion realizes on / off control through the pressure difference at its two ends. The switch portion of the air curtain device is designed as a pressure-controlled switch, so that when the wind pressure in the fan device reaches a certain level, the device automatically opens the air curtain device. On the one hand, the increase in the wind pressure in the fan device indicates that the suction force of the range hood has increased, and the fan is adjusted to a higher level, and the risk of oil smoke overflow increases. At this time, the cooperation of the air curtain is required, and the air curtain device automatically opens. When the wind pressure in the fan device drops to a certain value, the switch portion is closed.

[0104] Embodiment 9

[0105] The air curtain range hood of this embodiment differs from the above embodiments in that at least a portion of the switch portion of the air curtain device is disposed on the outside of the air curtain range hood, and the user can trigger the switch portion to turn off / on the air curtain function of the air curtain device.

[0106] Furthermore, the air curtain range hood in this embodiment includes a position acquisition unit for acquiring the user's position. The gas condition acquisition device includes an atmosphere acquisition switch unit for controlling whether the gas condition acquisition device is turned on or off.

[0107] Furthermore, in the air curtain range hood of this embodiment, the position acquisition unit is connected to the atmosphere acquisition switch unit and controls the operating state of the gas condition acquisition device. When the position acquisition unit determines that the first distance between the user and the air curtain range hood reaches / does not reach a corresponding threshold, the atmosphere acquisition switch unit controls the air curtain device and / or the impurity removal unit and / or the gas condition acquisition device to turn on / off, and / or displays the acquisition result and / or provides operational suggestions.

[0108] Furthermore, in the air curtain range hood of this embodiment, when the position acquisition unit acquires a first distance between the user and the air curtain range hood that reaches / does not reach a corresponding threshold, the impurity removal unit is controlled to increase / decrease impurity removal capability and / or to display the acquisition result and / or to provide operational suggestions. Preferably, the first distance is the distance between the air curtain outlet of the air curtain range hood and the user.

[0109] The air curtain range hood described in this embodiment incorporates a position acquisition unit. Preferably, the position acquisition unit is connected to the air curtain device. When the position acquisition unit detects a human body state reaching a threshold, the air curtain device is controlled to open. Alternatively, a switch unit is connected to the position acquisition unit. When the position acquisition unit detects a human body state reaching a threshold, the gas condition acquisition device is controlled to open. This control method helps reduce system burden.

[0110] Furthermore, in the air curtain range hood described in this embodiment, the location acquisition unit not only incorporates the user's location into one of the conditions for controlling the opening of the air curtain, but also defines its specific operation mode. On the one hand, the air curtain's air outlet or the distance between the device and the user can be used to determine whether the air curtain is useful to the user. If the user is near the device, the fumes or water vapor may affect the user. Alternatively, when the user is near the device, the fumes or water vapor are very likely to affect the user.

[0111] Example 10

[0112] The difference between the air curtain range hood of this embodiment and the above embodiment is that the position acquisition unit controls the working state of the impurity removal unit and / or prompts the acquisition result and / or prompts operation suggestions based on the first distance and the result obtained by the gas condition acquisition device.

[0113] Furthermore, in the air curtain range hood in this embodiment, the position acquisition unit acquires the first distance and the result acquired by the gas condition acquisition device, and determines whether the gas condition of the air curtain airflow will affect the user. If the judgment result is yes, the working state of the impurity removal unit is adjusted and / or the acquisition result and / or operation suggestions are prompted.

[0114] Example 11

[0115] The air curtain range hood of this embodiment differs from the above-described embodiments in that it includes an air curtain device for forming an air curtain, and a gas condition acquisition device for acquiring the composition and content of gas components. The gas condition acquisition device includes a first gas condition acquisition device for acquiring the composition and content of gas components in the working area of ​​the air curtain range hood, and a second gas condition acquisition device for acquiring the composition and content of gas components in the non-working area of ​​the air curtain range hood. The working area includes at least a portion of the air intake range of the air curtain range hood's air intake port, and the non-working area includes the top, / or front, / or left, / or right, / or bottom of the air curtain range hood, as well as at least a portion of each of the above.

[0116] The air curtain range hood described in this embodiment defines a working area and a non-working area. The environment surrounding the range hood is divided into at least two parts. The area near the air intake is considered the working area. This area is within the range of the range hood's suction power, and the gas in this area is drawn into the range hood to a greater extent. The gas in this area can indicate the target gas composition of the range hood.

[0117] Furthermore, the air curtain range hood described in this embodiment includes a fan device that generates airflow. A control device is connected to the air curtain device and / or the gas condition acquisition device, and adjusts the working state of the air curtain device and / or prompts a judgment result and / or prompts an operation suggestion based on the data acquired by the gas condition acquisition device. The control device controls the working state of the gas condition acquisition device and / or the air curtain device based on the working state of the fan device. Preferably, the working state of the air curtain device includes an open and / or closed state. When the fan device is in the closed state, the control device turns off the gas condition acquisition device and / or the air curtain device.

[0118] Example 12

[0119] The air curtain range hood of this embodiment differs from the above embodiments in that the control device is adjusted based on data generated simultaneously by the air curtain device and / or the gas condition acquisition device. Preferably, the data is real-time data, and the adjustment is real-time.

[0120] Alternatively, the control device adjusts the air curtain device and / or the gas condition acquisition device based on data generated during the same time period. Preferably, the data is calculated over a specified time period, and the adjustment is intermittent. Furthermore, preferably, the specified time period includes time automatically acquired by the device and / or time set by the user.

[0121] In the air curtain range hood described in this embodiment, the data acquired by the gas condition acquisition device can be acquired in real time, while the control device can be based on real-time data or calculated data within a specific time period, such as average value calculation. This design enriches the device's control methods, and the specific implementation method can be automatically set by the system or selected by the user.

[0122] Example 13

[0123] The air curtain range hood of this embodiment differs from the above-described embodiment in that the first gas condition acquisition device generates first data based on the gas in the working area, and the control device adjusts the operating state of the air curtain device and / or displays the acquisition result and / or provides operational suggestions based on the first data. Preferably, when the first data reaches / does not reach a corresponding threshold, the air curtain device is controlled to open / close and / or the acquisition result and / or operational suggestions are provided.

[0124] With the air curtain range hood introduced in this embodiment, when the first data is used alone as the basis for investigation, if the first data reaches the corresponding threshold value (corresponding to a situation where the oil smoke is more serious), the air curtain is selected to be turned on regardless of the second data. At this time, considering that the oil smoke is already very serious, if it is not turned on, the risk of oil smoke leaking to the non-working area will increase, affecting the user's use environment. As the range hood works to a certain moment, the relationship between the first data and the second data meets the conditions for closing the air curtain. For example, when the oil smoke content reflected by the second data is greater than the oil smoke content reflected by the first data, the control device will close the air curtain or suggest the user to close the air curtain, so as to absorb the oil smoke in the non-working area into the range hood, thereby achieving overall environmental improvement.

[0125] Example 14

[0126] The air curtain range hood of this embodiment differs from the above-described embodiment in that: the first gas condition acquisition device generates first data based on the gas in the working area, and the second gas condition acquisition device generates second data based on the gas in the non-working area; the control device makes a judgment based on the first data, the second data, and corresponding thresholds, and adjusts the operating state of the air curtain device and / or prompts the judgment result and / or prompts an operational suggestion based on the judgment result. Preferably, if the comparison result between the first data and the second data exceeds the corresponding threshold, the air curtain device is adjusted to open and / or the judgment result and / or prompts a suggestion to open the air curtain device.

[0127] Furthermore, if the comparison result between the first data and the second data does not exceed a corresponding threshold, the air curtain device is adjusted to be closed and / or a judgment result is prompted and / or a prompt is given to recommend closing the air curtain device. At least a portion of the second gas condition acquisition device is disposed on a side of the air curtain range hood facing a user.

[0128] Using the air curtain range hood described in this embodiment, the first and second data are compared. If the difference between the two is small, it indicates that there is also oil smoke in the non-working area. In this case, the air curtain is less effective in protecting the user. In this case, the air curtain is closed or the user is advised to close it to remove the oil smoke in the non-working area. Furthermore, the present invention defines the non-working area as the area in front of the range hood and stove, which helps to fully incorporate the user's environment into the assessment.

[0129] Example 15

[0130] The difference between the air curtain range hood of this embodiment and the above-mentioned embodiment is that: the impurity removal device includes an impurity removal unit arranged in the air curtain device, and an impurity removal ability judgment device judges the impurity removal ability of the impurity removal device through data obtained by the gas condition acquisition device. When the impurity removal device shows insufficient impurity removal ability, it may be that the impurity removal device needs to be replaced and cleaned, or the oil smoke near the stove is heavy. At this time, the fan device of the equipment is adjusted to increase the air suction capacity. The present invention further introduces an impurity removal device / impurity removal unit with adjustable impurity removal ability. When combined with the impurity removal device / impurity removal unit introduced in the present invention, the air curtain range hood can control the impurity removal ability of the impurity removal device / impurity removal unit through the results obtained by the gas condition acquisition device to ensure the impurity removal effect under different usage conditions.

[0131] Furthermore, the gas condition acquisition device in this embodiment includes a working area gas condition acquisition device for obtaining the composition / content of the gas components in the working area of ​​the air curtain range hood and an air duct gas condition acquisition device for obtaining the composition / content of the gas components in the air duct of the air curtain range hood. The air duct includes the air curtain air duct of the air curtain device. The gas condition acquisition device is designed to include at least two types: a working area gas condition acquisition device and an air duct gas condition acquisition device. A comprehensive investigation of the target gas composition conditions in the working area and the gas composition conditions in the air duct can effectively demonstrate the cleaning effect of the impurity removal device on the target substance. At this time, the air duct gas condition acquisition device is preferably arranged on the side where the impurity removal device is connected to the air duct outlet.

[0132] Furthermore, the duct gas condition acquisition device in this embodiment includes a duct gas condition acquisition device for acquiring the composition / content of gas within the air curtain duct. The duct gas condition acquisition device includes a first duct gas condition acquisition device for acquiring the airflow in the air curtain duct on the side of the air curtain duct moving toward the impurity removal unit. The impurity removal capability determination device compares the data acquired by the first duct gas condition acquisition device with the data acquired by the working area gas condition acquisition device. When the result of the comparison does not exceed a threshold, the impurity removal capability of the impurity removal device is considered to be good. The air curtain range hood described in this embodiment incorporates a first duct gas condition acquisition device in the air curtain duct to assess the quality of the air curtain airflow. The assessment result can be either good air curtain airflow quality, suitable for normal use, or poor air curtain airflow quality, in which case the impurity removal capability of the impurity removal device and / or impurity removal unit is adjusted accordingly based on the first duct gas condition acquisition device, or the user is notified of the poor quality. Furthermore, when the impurity removal capability of the impurity removal device and / or impurity removal unit is adjusted to the system-set limit, the user is notified of the current situation and prompted to conduct an inspection.

[0133] The difference between the air curtain range hood described in this embodiment and the above embodiment is that: the air duct gas condition acquisition device includes an air duct gas condition acquisition device for obtaining the gas component composition / content in the air curtain duct; the air duct gas condition acquisition device includes a second air duct gas condition acquisition device for obtaining the side of the air flow in the air curtain duct that moves away from the impurity removal unit.

[0134] Furthermore, the impurity removal ability judgment device in this embodiment compares the data obtained by the second air duct gas condition acquisition device with the data obtained by the working area gas condition acquisition device. When the result of the comparison between the two does not exceed the threshold, the impurity removal ability of the impurity removal device and / or impurity removal unit is good.

[0135] A second air duct gas condition acquisition device is added to the air duct of the air curtain device. Comparing the data acquired by the second air duct gas condition acquisition device with the data acquired by the working area gas condition acquisition device can further evaluate the impurity removal capabilities of the impurity removal device and / or impurity removal unit. The evaluation results are more intuitive.

[0136] The duct gas condition acquisition device includes an air curtain duct gas condition acquisition device for acquiring the gas component composition / content in the air curtain duct; the air duct gas condition acquisition device includes a first air duct gas condition acquisition device for acquiring the side of the air curtain duct moving toward the impurity removal unit; the air duct gas condition acquisition device includes a second air duct gas condition acquisition device for acquiring the side of the air curtain duct moving away from the impurity removal unit.

[0137] Furthermore, the impurity removal capability determination device in this embodiment compares the data acquired by the first duct gas condition acquisition device with the data acquired by the second duct gas condition acquisition device. When the result of the comparison does not exceed a threshold, the impurity removal capability of the impurity removal unit is good. By comparing the data between the first duct gas condition acquisition device and the second duct gas condition acquisition device, the impurity removal capability of the impurity removal unit can be independently evaluated.

[0138] Example 16

[0139] The air curtain range hood described in this embodiment differs from the above embodiments in that it includes:

[0140] An air curtain device, used to form an air curtain, comprising at least two air outlet units arranged at different positions and capable of independently adjusting / controlling the working state;

[0141] A gas condition acquisition device controls the working state of the air curtain device and / or prompts the gas condition of the surrounding environment and / or prompts operation suggestions through the gas condition in the surrounding environment of the air curtain range hood. With the air curtain range hood introduced in the present invention, the generation position of the air curtain is designed so that the air outlet is set at multiple positions along the range hood, and the air outlet is further divided into air outlet units. Multiple air outlet units belonging to the same air outlet are continuously arranged, so that the range hood can shield oil smoke in multiple directions. The oil smoke it shields is not only the oil smoke generated by the corresponding stove, but also includes the oil smoke generated by other nearby stoves. The air outlet can be a continuous strip hole structure, and the air outlet unit can divide the air outlet into multiple units. The air outlet composed of multiple units has structural continuity. When the air outlet generates an air curtain as a whole, the air curtain is continuous.

[0142] Example 17

[0143] The air curtain range hood described in this embodiment has a gas condition acquisition device that acquires the gas conditions at different locations around the range hood and controls the working state of the air outlet unit based on the gas conditions. Since the air outlet unit is small in size and can be set up flexibly, it can be set up in multiple locations of the range hood, even in relatively narrow spaces. For more complex gas environments, the opening timing of the air outlet unit can be controlled according to the composition and content of the oil smoke, and the air outlet unit can be turned on only when the oil smoke needs to be shielded at that location. The working states of the air outlet unit include: on, off, and / or air volume adjustment and / or wind direction adjustment.

[0144] Furthermore, in this embodiment, when the corresponding gas condition value obtained by the gas condition acquisition device exceeds a corresponding threshold, the range hood controls the corresponding air outlet unit to open and / or adjust the air volume and / or air direction. This takes the environmental state into consideration. When the corresponding gas condition value in the environment exceeds the threshold, it is determined that there is oil smoke, and the air curtain device is activated to block the oil smoke.

[0145] Furthermore, the range hood in this embodiment has multiple gas condition acquisition devices, each of which acquires data at different locations, and each of which corresponds to one of the air outlet units. By assigning a gas condition acquisition device to each air outlet unit, when a gas condition acquisition device detects that the oil smoke concentration reaches a corresponding threshold, the corresponding air outlet unit is activated.

[0146] Embodiment 18

[0147] The air curtain range hood described in this embodiment differs from the above-mentioned embodiment in that at least two adjacent air outlet units form an air outlet, which is the outlet of the air curtain, has a continuous structure, and the number of air outlets is at least two. Preferably, the acquisition method includes detection. The data can also be acquired through other devices in the working environment. The air outlet units can be multiple and connected together to form an air outlet with a complete air outlet range. When the air outlet generates an air curtain as a whole, the air curtain is continuous.

[0148] Furthermore, in this embodiment, there are multiple gas condition acquisition devices, and the data acquisition positions of the multiple gas condition acquisition devices are different. The multiple gas condition acquisition devices are set in a one-to-one correspondence with the air outlets. Then, each air outlet corresponds to a gas condition acquisition device. When the gas condition acquisition device at a certain air outlet exceeds the corresponding threshold, the range hood further determines which level of the threshold the gas condition corresponds to. Furthermore, the oil smoke threshold of the range hood in this embodiment includes a first level, a second level, and a third level, which are arranged in ascending order. When the condition acquisition device detects that the oil smoke level reaches the oil smoke threshold, it further determines which of the three levels the detected data meets. When the oil smoke content meets the minimum first level, at least one part of the air outlet units corresponding to the air outlet is opened. When the oil smoke level meets the second level, at least half of the number of air outlet units corresponding to the air outlet is opened. When the oil smoke level meets the third level, all air outlet units corresponding to the air outlet are opened.

[0149] Example 19

[0150] The difference between the air curtain range hood described in this embodiment and the above embodiment is that the gas condition acquisition device acquires the conditions of different gas components separately. The gas condition acquisition device includes an oil fume acquisition module for acquiring the oil fume content and / or a moisture acquisition module for acquiring the moisture content. Different components constituting oil fume are treated separately, and different thresholds are set for different components. When the data acquired by the oil fume acquisition module exceeds the corresponding oil fume threshold, the air curtain device corresponding to the oil fume acquisition module is turned on. When the data acquired by the oil fume acquisition module does not exceed the corresponding oil fume threshold, it is further determined whether the value acquired by the moisture acquisition module exceeds the corresponding oil fume threshold. Preferably, the oil fume threshold ≥ moisture threshold. The range hood's evaluation of oil fume is more stringent, while its evaluation of moisture is more relaxed, allowing a certain moisture content in the environment.

[0151] Furthermore, the gas condition acquisition device in this embodiment includes multiple fume acquisition modules and / or moisture acquisition modules, each of which is spaced apart. This allows for flexible adjustment of detection accuracy for different locations. For example, on the side of the range hood facing the user, the number of fume acquisition modules can be increased, allowing for installation of modules in multiple locations to ensure timely detection of abnormal fume conditions and adequate user protection.

[0152] Furthermore, in the range hood of this embodiment, when the data acquired by the oil fume acquisition module exceeds a corresponding oil fume threshold, the air curtain device corresponding to the oil fume acquisition module is activated. If the data acquired by the oil fume acquisition module does not exceed the corresponding oil fume threshold, the range hood further determines whether the value acquired by the moisture acquisition module exceeds the corresponding oil fume threshold. Preferably, the oil fume threshold ≥ the moisture threshold.

[0153] Example 20

[0154] The difference between the air curtain range hood described in this embodiment and the above-mentioned embodiment is that the gas condition acquisition device judges the validity of the gas condition of the current stage it obtains. When the gas condition it obtains is invalid, it controls the working state of the air curtain device and / or prompts the gas condition of the surrounding environment and / or prompts operation suggestions based on the gas condition of the previous stage. After obtaining the environmental condition data, the gas condition acquisition device does not directly make a judgment based on the data, but judges whether the data is valid. This method can effectively ignore fluctuations in environmental conditions and reduce judgment errors. This method can filter out gas fluctuations. For example, a short-term increase in oil fume content has a shielding significance, and this situation can be ignored.

[0155] Furthermore, the gas condition acquisition device in this embodiment uses the stability of the gas condition it acquires as one of the criteria for judging its validity. When the fluctuation of the gas condition at the current stage is within the corresponding stability threshold range, it is judged as valid data, otherwise it is judged as invalid data.

[0156] Alternatively, the fluctuation condition includes the degree of deviation of the gas condition from the historical data. Preferably, when the fluctuation condition exceeds a corresponding historical data deviation degree threshold, it is determined to be invalid data.

[0157] Alternatively, the fluctuation condition includes the cumulative time that the gas condition exceeds its standard value. Preferably, the standard value ranges from 60% to 90% of the average value / maximum value of the working area condition data.

[0158] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. An air curtain range hood, characterized in that: include, An air curtain device forming an air curtain, wherein the air outlet size and / or air outlet position of the air curtain are adjustable, thereby adjusting the oil fume shielding range of the air curtain and / or the distribution position of the air curtain; a gas condition acquisition device for controlling the working state of the air curtain device and / or prompting the gas condition of the surrounding environment and / or prompting operation suggestions based on the gas condition in the surrounding environment of the air curtain range hood; The air curtain device comprises: an air storage portion having a cavity structure, a fan device providing power for generating the air curtain airflow, and a fan cavity accommodating the fan device; The fan cavity and the air storage portion are connected via an air inlet portion and a guide portion that are sequentially connected and form a through-cavity body inside, and the air inlet portion is in communication with the fan cavity; The opening of the air inlet portion adjacent to one end of the fan cavity is arranged to face the direction of the air flow out of the fan cavity; The air storage part is provided with an air outlet of the air curtain device, and the airflow discharged from the air outlet forms an air curtain. The cavity inside the air storage part is annular, and the annular cavity of the air storage part is arranged around the air suction port of the air curtain range hood, and multiple air outlets are arranged around the air suction port. The gas condition acquisition device includes a first gas condition acquisition device for acquiring the composition and content of the gas in the working area of ​​the air curtain range hood and a second gas condition acquisition device for acquiring the composition and content of the gas in the non-working area of ​​the air curtain range hood; The working area includes at least a portion of the suction range of the air intake of the air curtain range hood, and the non-working area includes at least a portion of the upper side and / or the front side and / or the left side and / or the right side and / or the lower side of the air curtain range hood; The first gas condition acquisition device generates first data based on the gas in the working area, and the second gas condition acquisition device generates second data based on the gas in the non-working area; if the comparison result between the first data and the second data exceeds the corresponding threshold, the air curtain device is adjusted to open and / or the judgment result and / or a prompt is given to recommend opening the air curtain device; if the comparison result between the first data and the second data does not exceed the corresponding threshold, the air curtain device is adjusted to close and / or the judgment result and / or a prompt is given to recommend closing the air curtain device.

2. The air curtain range hood according to claim 1, characterized in that: The air outlet includes at least two air outlet units, and the at least two air outlet units constitute the air outlet range of the air outlet.

3. The air curtain range hood according to claim 2, characterized in that: The air outlet unit can independently adjust its working state.

4. The air curtain range hood according to claim 1, characterized in that: The air storage portion is arranged toward the outside of the range hood, and at least one air outlet is provided at one end of the air storage portion adjacent to the outside of the range hood.

5. The air curtain range hood according to claim 4, characterized in that: The fan devices are arranged in a one-to-one correspondence with the air outlets.

6. The air curtain range hood according to claim 5, characterized in that: The fan device is arranged in the air storage part.

7. The air curtain range hood according to claim 6, characterized in that: The number of the air outlet is at least one.

8. The air curtain range hood according to claim 4, characterized in that: The fan device is arranged corresponding to the multiple air outlets of the air curtain device.

9. The air curtain range hood according to claim 8, characterized in that: The air storage portion is a through annular cavity / a broken line cavity, and the air storage portion is arranged along the circumference of the range hood.

10. The air curtain range hood according to claim 2, characterized in that: The air curtain device includes an adjusting unit for controlling the working state of the air outlet unit. The adjusting unit can turn the air outlet unit on and off and / or adjust the air volume and / or wind direction by changing its relative position with the air outlet unit.

11. The air curtain range hood according to claim 10, characterized in that: The regulating units are arranged in a one-to-one correspondence with the air outlet units.

12. The air curtain range hood according to claim 10, characterized in that: At least part of the power for the range hood to absorb oil smoke is provided by the fan device.

13. The air curtain range hood according to claim 12, characterized in that: The air suction port of the range hood is communicated with the air duct of the air curtain device, and an air flow for sucking oil fumes is generated under the drive of the fan device.

14. The air curtain range hood according to claim 1, characterized in that: At least a portion of the air inlet is disposed in the fan cavity.

15. The air curtain range hood according to claim 14, characterized in that: The air inlet of the range hood is communicated with the fan cavity.

16. The air curtain range hood according to claim 1, characterized in that: The air inlet portion and the guide portion are connected via a transition portion. The axis of the air inlet portion and / or the guide portion mainly extends in a straight line. The transition portion has a certain bending angle, thereby changing the airflow direction in the air curtain device.

17. The air curtain range hood according to claim 16, characterized in that: The transition portion is in a pipe shape.

18. The air curtain range hood according to claim 17, characterized in that: The angle between the extending direction of the guide portion along the direction of the internal air flow and the air outlet direction of the air curtain device is in the range of 90° to 180°.

19. The air curtain range hood according to claim 18, characterized in that: The air inlet portion, transition portion and guide portion are integrally arranged.

20. The air curtain range hood according to claim 13, characterized in that: At least part of the air duct of the air curtain device is formed by the smoke collecting chamber cover and the outer shell of the air curtain range hood.

21. The air curtain range hood according to claim 20, characterized in that: The components of the cavity inside the air storage part include a smoke collecting chamber cover plate surrounding the smoke collecting chamber, a shell component connected to the smoke collecting chamber cover plate around the periphery thereof, and a sealing member arranged opposite to the smoke collecting chamber cover plate and connected to the shell component.

22. The air curtain range hood according to claim 21, characterized in that: The number of the housing component and / or the smoke collecting chamber cover and / or the closing member is at least one.

23. The air curtain range hood according to claim 22, characterized in that: The guide portion passes through the closing member or the smoke collecting chamber cover plate or the shell component and is communicated with the cavity inside the air storage portion.

Images