CN110631081B - Air curtain smoke exhaust ventilator - Google Patents

Abstract

The invention discloses an air curtain range hood, comprising: the air curtain device is used for forming an air curtain and comprises at least two air outlet units which are arranged at different positions and can independently realize the adjustment of the working state; and 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 an operation suggestion according to the gas condition in the surrounding environment of the air curtain range hood. The air curtain range hood introduced by the invention designs the generation position of the air curtain, so that the air outlets are arranged along a plurality of positions of the range hood, the working states of the air outlets at different positions are adjusted according to the corresponding environmental states, and the oil smoke generated in different areas is shielded in a targeted manner.

Description

Air curtain smoke exhaust ventilator

Technical Field

The invention belongs to the field of kitchen air purification equipment, and particularly relates to an air curtain range hood.

Background

Kitchen cleaning equipment in the prior art relies on air flow to improve the kitchen gas environment. At present, most of the equipment is the range hood and the related improved equipment, and the types of the equipment are various, and the equipment has double cylinders, single cylinders, a cover type, upper air suction, lower air suction and the like. However, these range hoods are passive air suction devices, and the oil smoke suction port is a certain distance away from the cooking device that generates oil smoke, so that the oil smoke having certain kinetic energy and generated instantaneously during cooking cannot be completely removed. In order to solve the above problems, manufacturers of kitchen cleaning equipment often improve the range hood in a manner of changing the height and working power thereof, so that the fume suction effect is improved, but the problem of the fume overflowing from the periphery of the cooker still cannot be solved. In addition, the problem of oil smoke escape cannot be solved by increasing the area of the range hood cage to control the rising oil smoke below the smoke hood, increasing the power of the main motor and enhancing the smoke exhaust effect by large suction force. Therefore, how to effectively block the oil smoke from escaping becomes a problem which needs to be solved urgently. The performance requirements of consumers on kitchen air purification equipment are higher and higher, the large suction force becomes the pursuing target of various big merchants, but the problems of incomplete suction, oil smoke overflow and the like cannot be solved by the range hood sold on the market at present, a small part of range hood escapes from the front part of the machine in the cooking process, directly attacks clothes, hair and faces of cookers, is harmful to the skin of the faces, induces respiratory diseases if being sucked by human bodies for a long time, and directly influences the body health of the users. Therefore, the range hood in the prior art is provided with an air curtain device for solving the problem of oil smoke escape so as to isolate the user from the escaping oil smoke when the user uses the range hood. However, in practical use, the range hood faces a more complex working environment, and particularly, in an environment with multiple cooking ranges, such as a kitchen of a restaurant, the range hood is located in a larger space, the phenomenon of oil smoke diffusion is more obvious, the use conditions of the multiple cooking ranges are different, the phenomenon that oil smoke with different degrees flows in different working areas exists, and the difficulty in oil smoke shielding is increased.

The present invention has been made in view of this situation.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide an air curtain range hood, wherein the generation position of an air curtain is designed, so that air outlets are arranged along a plurality of positions of the range hood, the working states of the air outlets at different positions are adjusted according to the corresponding environmental states, and the oil smoke generated in different areas is screened in a targeted manner.

In order to solve the technical problems, the invention adopts the technical scheme that:

an air curtain range hood comprising:

the air curtain device is used for forming an air curtain and comprises at least two air outlet units which are arranged at different positions and can independently realize the adjustment/control of the working state;

and 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 an operation suggestion according to the gas condition in the surrounding environment of the air curtain range hood.

The invention is further configured to: the gas condition acquisition device acquires gas conditions of different positions around the range hood and controls the working state of the air outlet unit according to the gas conditions;

preferably, the working state of the air outlet unit includes: opening, closing and/or adjusting air quantity and/or wind direction;

preferably, when the corresponding value of the gas condition obtained by the gas condition obtaining device exceeds the corresponding threshold value, the corresponding air outlet unit is controlled to be opened and/or the air volume and/or the wind direction are/is adjusted;

preferably, the number of the gas condition acquisition devices is multiple, the data acquisition positions of the multiple gas condition acquisition devices are different, and the multiple gas condition acquisition devices are arranged in one-to-one correspondence with the air outlet unit.

The invention is further configured to: at least two adjacent air outlet units form an air outlet, the air outlet is an outlet of an air curtain, and the structure of the air outlet is continuous;

preferably, the number of the air outlets is at least two;

preferably, the manner of acquiring comprises detecting.

The invention is further configured to: the gas condition acquisition device acquires conditions of different gas components respectively;

preferably, the gas condition acquiring device comprises a lampblack acquiring module for acquiring lampblack content and/or a moisture acquiring module for acquiring moisture content;

preferably, the number of the oil smoke obtaining modules and/or the moisture obtaining modules of the gas condition obtaining device is multiple, and the oil smoke obtaining modules and/or the moisture obtaining modules are arranged at intervals;

preferably, when the data acquired by the oil smoke acquisition module exceeds the corresponding oil smoke threshold, the corresponding air curtain device of the oil smoke acquisition module is started. When the data acquired by the oil smoke acquisition module does not exceed the corresponding oil smoke threshold, further judging whether the numerical value acquired by the moisture acquisition module exceeds the corresponding oil smoke threshold;

preferably, the oil smoke threshold value is larger than or equal to the moisture threshold value.

The invention is further configured to: the number of the gas condition acquisition devices is multiple, the data acquisition positions of the gas condition acquisition devices are different, and the gas condition acquisition devices and the air outlets are arranged in a one-to-one correspondence manner;

preferably, the oil smoke threshold and/or the moisture threshold are divided into a plurality of grades with different value ranges, and the range hood opens the air outlet unit corresponding to the grade according to the threshold grade corresponding to the data acquired by the gas condition acquisition device.

The invention is further configured to: the gas condition acquisition device judges the effectiveness of the gas condition of the current stage acquired by the gas condition acquisition device, and when the acquired gas condition is invalid, the working state of the air curtain device is controlled according to the gas condition of the previous stage and/or the gas condition of the surrounding environment is prompted and/or an operation suggestion is prompted.

The invention is further configured to: the gas condition acquisition device takes the stability of the acquired gas condition as one of the criteria for judging whether the gas condition is effective or not;

preferably, when the fluctuation condition of the gas condition at the current stage is within the corresponding stability threshold range, the data is determined to be valid data, otherwise, the data is determined to be invalid data.

The invention is further configured to: the fluctuation condition comprises a deviation degree of the gas condition relative to historical data;

preferably, when the fluctuation situation exceeds the corresponding threshold value of the deviation degree of the historical data, the data is judged to be invalid.

The invention is further configured to: the fluctuation condition comprises the accumulated time that the gas condition exceeds its standard value;

preferably, the standard value of the gas condition ranges from 60% to 90% of the average value/maximum value of the working area condition data.

The invention is further configured to: the air curtain device comprises a fan device for providing power for generating air curtain airflow, and at least part of the power for absorbing the oil smoke of the range hood is provided by the fan device.

The invention further introduces an air curtain range hood which comprises an air curtain device forming an air curtain, wherein the size and/or the air outlet position of an air outlet of the air curtain are adjustable, so that the oil smoke shielding range and/or the distribution position of the air curtain are adjusted.

The invention is further configured to: the air outlet comprises at least two air outlet units, and the at least two air outlet units form an air outlet range of the air outlet;

preferably, the air outlet unit can independently realize the adjustment of the working state of the air outlet unit; the invention is further configured to: the air curtain device comprises a fan device for providing power for generating air curtain airflow, and the fan device and the air outlet are arranged in one-to-one correspondence;

preferably, the fan device is provided in the air storage portion.

The invention is further configured to: the air curtain device comprises a fan device for providing power for generating air curtain airflow, and the fan device corresponds to a plurality of air outlets of the air curtain device.

The invention is further configured to: the air storage part is a through annular cavity/broken line type cavity, and the air storage part is arranged along the circumferential direction of the range hood.

The invention is further configured to: the air curtain device comprises an adjusting unit for controlling the working state of the air outlet unit, and the adjusting unit realizes the opening and closing of the air outlet unit and/or the air volume adjustment and/or the wind direction adjustment by changing the relative position of the adjusting unit and the air outlet unit;

preferably, the air curtain device comprises an adjusting unit for controlling the working state of the air outlet unit by changing the relative position of the air outlet unit and the air curtain device;

preferably, the adjusting units are arranged in one-to-one correspondence with the air outlet units.

The invention is further configured to: the air curtain device comprises a fan device for providing power for generating air curtain airflow, and at least part of the power for absorbing the oil smoke of the range hood is provided by the fan device;

preferably, the air curtain device comprises a fan device for providing power for generating air curtain airflow and providing power for the range hood to suck oil smoke.

The invention is further configured to: the exhaust inlet of the range hood is communicated with the air channel of the air curtain device, and the air curtain fan is driven to generate the airflow for absorbing the oil smoke.

The invention is further configured to: the air curtain device comprises a fan cavity for accommodating the fan device, the fan cavity is connected with the air storage part through an air inlet part and a guide part which are sequentially connected and form a through cavity inside, and the air inlet part is communicated with the fan cavity;

preferably, at least part of the air inlet part is arranged in the fan cavity;

preferably, the air inlet of the range hood is communicated with the fan cavity;

preferably, an opening of one end of the air inlet portion, which is close to the fan cavity, faces the airflow direction in the fan cavity.

The invention is further configured to: the air inlet part and the guide part are connected through the transition part, the axis of the air inlet part and/or the axis of the guide part mainly extend along the linear direction, and the transition part has a certain bending angle, so that the airflow direction in the air curtain device is changed;

preferably, the transition portion is tubular;

preferably, the included angle between the extending direction of the guide part along the trend of the air flow inside the guide part and the air outlet direction of the air curtain device is 90-180 degrees;

preferably, air inlet portion, transition portion, guide portion set up for an organic whole.

The invention is further configured to: at least part of the air duct of the air curtain device is composed of a smoke collection cavity cover plate and a shell of the air curtain range hood;

preferably, the cavity inside the air storage part comprises a smoke collection cavity cover plate surrounding a smoke collection cavity, a shell member connected with the smoke collection cavity cover plate at the periphery of the smoke collection cavity cover plate, and a sealing member arranged opposite to the smoke collection cavity cover plate and connected with the shell member;

preferably, the number of said housing members and/or said smoke collection chamber cover plates and/or closures is at least one;

preferably, the guide communicates with a cavity inside the sump portion through the closure/smoke collection chamber cover/housing member.

After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.

1. According to the air curtain range hood introduced by the invention, the generation position of the air curtain is designed, so that the air outlet is arranged along a plurality of positions of the range hood, the air outlet is further divided into air outlet units, and the plurality of air outlet units belonging to the same air outlet are continuously arranged, so that the range hood can shield oil smoke in a plurality of directions. The shielded oil smoke is not only the oil smoke generated by the corresponding cooking range, but also the oil smoke generated by other nearby cooking ranges. The air outlet can be continuous bar pore structure, and the air-out unit can be cut apart into a plurality of units with the air outlet, and the air outlet that a plurality of units constitute jointly has structural continuity, and when the whole air curtain that generates of air outlet, the air curtain is continuous.

2. The air curtain range hood introduced by the invention brings the environmental state into the investigation range. When the corresponding value of the gas condition in the environment exceeds a threshold value, the oil smoke is judged to exist, and then the air curtain device is started to shield the oil smoke.

3. The air curtain range hood introduced by the invention treats different components forming oil smoke respectively, and sets different threshold values aiming at different components. And when the data acquired by the oil smoke acquisition module exceeds the corresponding oil smoke threshold value, the corresponding air curtain device of the oil smoke acquisition module is started. When the data acquired by the oil smoke acquisition module does not exceed the corresponding oil smoke threshold value, whether the value acquired by the moisture acquisition module exceeds the corresponding oil smoke threshold value is further judged. Preferably, the oil smoke threshold value is larger than or equal to the moisture threshold value. The range hood has a harsh evaluation on the oil smoke, and a loose evaluation on the moisture, which allows a certain moisture content in the environment.

4. According to the air curtain range hood introduced by the invention, the gas condition acquisition device does not directly judge according to the data after acquiring the environmental condition data, but judges whether the data is effective or not. The method can effectively omit the fluctuation of the environmental condition and reduce the judgment error.

5. The air curtain range hood introduced by the invention further designs the matching relationship between the air curtain device and the fan device. The air duct of the air curtain device is communicated with the air duct of the fan device, the fan device provides power for absorbing oil smoke, and the power mechanism of the device is simplified.

6. By the air curtain range hood introduced by the invention, because the matching relation between the air curtain device and the exhaust inlet is designed, the structure of the air curtain device is correspondingly improved. The air duct of the air curtain device is composed of a plurality of sections of continuous cavities, and the functions realized by different sections are different. The air curtain airflow can be ensured to change the direction in the equipment while the air curtain airflow can smoothly flow in the equipment.

7. According to the air curtain range hood introduced by the invention, the direction of the air inlet part is designed, so that the gas exhausted by the fan device can be more efficiently pushed into the air curtain device, and the phenomenon that the air curtain device stops the gas flow to cause the loss of the flowing performance of the gas flow is avoided.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a left-view structural sectional view of an air curtain range hood in one embodiment of the invention;

fig. 2 is a schematic view of a bottom-view direction structure of an air curtain range hood in an embodiment of the invention.

In the figure: 10. air curtain range hood; 1. a housing; 11. a housing member; 21. an air inlet of the air curtain device; 23. an air outlet of the air curtain device; 24. an air inlet part; 25. a transition section; 26. a guide section; 27. an air storage section; 31. a fan; 32. an air duct of the fan device; 33. an air outlet of the fan device; 4. a smoke collection cavity cover plate; 5. a closure; 6. and an impurity removal unit.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention introduces an air curtain range hood, which comprises:

the air curtain device is used for forming an air curtain and comprises at least two air outlet units which are arranged at different positions and can independently realize the adjustment/control of the working state;

and 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 an operation suggestion according to the gas condition in the surrounding environment of the air curtain range hood. According to the air curtain range hood introduced by the invention, the generation position of the air curtain is designed, so that the air outlet is arranged along a plurality of positions of the range hood, the air outlet is further divided into air outlet units, and the plurality of air outlet units belonging to the same air outlet are continuously arranged, so that the range hood can shield oil smoke in a plurality of directions. The shielded oil smoke is not only the oil smoke generated by the corresponding cooking range, but also the oil smoke generated by other nearby cooking ranges. The air outlet can be continuous bar pore structure, and the air-out unit can be cut apart into a plurality of units with the air outlet, and the air outlet that a plurality of units constitute jointly has structural continuity, and when the whole air curtain that generates of air outlet, the air curtain is continuous.

Example one

In the air curtain range hood described in this embodiment, the gas condition obtaining device obtains the gas conditions of different positions around the range hood, and controls the working state of the air outlet unit according to the gas conditions. Because the volume of the air outlet unit is small, the air outlet unit is flexible in arrangement position, and the range hood can be arranged in a plurality of positions even in a narrow space. Aiming at a more complex gas environment, the opening time of the air outlet unit can be controlled according to the components and the content of the oil smoke, and the air outlet unit is opened only when the position needs to shield the oil smoke. The operating condition of air-out unit includes: opening and closing, and/or adjusting air quantity and/or wind direction.

Further, in the range hood of this embodiment, when the corresponding value of the gas condition obtained by the gas condition obtaining device exceeds the corresponding threshold value, the corresponding opening of the air outlet unit and/or the adjustment of the air volume and/or the adjustment of the wind direction are controlled. And taking the environmental state into consideration. When the corresponding value of the gas condition in the environment exceeds a threshold value, the oil smoke is judged to exist, and then the air curtain device is started to shield the oil smoke.

Further, in the range hood of the present embodiment, the number of the gas condition obtaining devices is plural, the data obtaining positions of the plural gas condition obtaining devices are different, and the plural gas condition obtaining devices and the air outlet unit are arranged in one-to-one correspondence. The gas condition acquisition devices and the air outlet units are arranged in a one-to-one correspondence mode, and when a certain gas condition acquisition device detects that the oil smoke concentration reaches a corresponding threshold value, the corresponding air outlet unit is started.

Example two

The difference between the air curtain range hood described in this embodiment and the above embodiments is: the adjacent at least two air outlet units form an air outlet, the air outlet is an outlet of an air curtain, the structure is continuous, and the number of the air outlets is at least two. Preferably, the manner of acquiring comprises detecting. The data may also be obtained by other devices within the work environment. The air outlet unit can be a plurality of air outlets which are connected into a whole to form an air outlet with a complete air outlet range. When the air outlet integrally generates the air curtain, the air curtain is continuous.

Further, in this embodiment, the number of the gas condition acquisition devices is plural, the data acquisition positions of the plural gas condition acquisition devices are different, and the plural gas condition acquisition devices are arranged in one-to-one correspondence with the air outlets. Each air outlet corresponds to one gas condition acquisition device, and when the gas condition acquisition device at a certain air outlet exceeds a corresponding threshold value, the range hood further judges which grade of the threshold value the gas condition corresponds to. Further, the range hood in this embodiment has a smoke threshold including a first level, a second level, and a third level, where the values are arranged from small to large, and when the condition obtaining device detects that the smoke level reaches the smoke threshold, it further determines which of the three levels the detected data conforms to. When the oil smoke content meets the minimum first grade, opening the part of the air outlet unit corresponding to the air outlet, wherein the number of the part is at least one. When the oil smoke grade accords with the second grade, at least half of the number of the air outlet units corresponding to the air outlet is opened. And when the oil smoke grade accords with the third grade, all the air outlet units corresponding to the air outlet are opened.

EXAMPLE III

The difference between the air curtain range hood described in this embodiment and the above embodiments is: the gas condition acquisition means acquires the conditions of different gas components, respectively. The gas condition acquisition device comprises an oil smoke acquisition module for acquiring oil smoke content and/or a moisture acquisition module for acquiring moisture content. Different components constituting the oil smoke are treated respectively, and different thresholds are set for the different components. And when the data acquired by the oil smoke acquisition module exceeds the corresponding oil smoke threshold value, the corresponding air curtain device of the oil smoke acquisition module is started. When the data acquired by the oil smoke acquisition module does not exceed the corresponding oil smoke threshold value, whether the value acquired by the moisture acquisition module exceeds the corresponding oil smoke threshold value is further judged. Preferably, the oil smoke threshold value is larger than or equal to the moisture threshold value. The range hood has a harsh evaluation on the oil smoke, and a loose evaluation on the moisture, which allows a certain moisture content in the environment.

Further, in the gas condition obtaining apparatus in this embodiment, the number of the lampblack obtaining modules and/or the moisture obtaining modules is plural, and the plural lampblack obtaining modules and/or the moisture obtaining modules are arranged at intervals. The detection accuracy can be flexibly set for different positions. For example, the number of the oil smoke acquisition modules can be increased on one side of the range hood facing a user, the oil smoke acquisition modules are arranged at a plurality of positions, abnormal oil smoke conditions are guaranteed to be found in time, and the user is fully protected.

Further, in the range hood in this embodiment, when the data acquired by the oil smoke acquisition module exceeds the corresponding oil smoke threshold, the corresponding air curtain device of 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 value, whether the value acquired by the moisture acquisition module exceeds the corresponding oil smoke threshold value is further judged. Preferably, the oil smoke threshold value is larger than or equal to the moisture threshold value.

Example four

The difference between the air curtain range hood described in this embodiment and the above embodiments is: the gas condition acquisition device judges the effectiveness of the gas condition of the current stage acquired by the gas condition acquisition device, and when the acquired gas condition is invalid, the working state of the air curtain device is controlled according to the gas condition of the previous stage and/or the gas condition of the surrounding environment is prompted and/or an operation suggestion is prompted. The gas condition acquisition device does not directly determine from the environmental condition data after acquiring the data, but determines whether the data is valid. The method can effectively omit the fluctuation of the environmental condition and reduce the judgment error. The method can filter out the condition of gas fluctuation, for example, the transient oil smoke content rise is of shielding significance, and the condition can not be considered.

Further, the gas condition obtaining device in the present embodiment takes the stability of the gas condition obtained by the gas condition obtaining device as one of the criteria for judging whether the gas condition is valid or not. And when the fluctuation condition of the gas condition at the current stage is within the corresponding stability threshold range, judging the data to be valid data, otherwise, judging the data to be invalid data.

Alternatively, the fluctuation condition includes a degree of deviation of the gas condition from the historical data. Preferably, when the fluctuation situation exceeds the corresponding threshold value of the deviation degree of the historical data, the data is judged to be invalid.

Still alternatively, the fluctuation comprises an accumulated time that the gas condition exceeded its standard value. Preferably, the standard value of the gas condition ranges from 60% to 90% of the average value/maximum value of the working area condition data.

EXAMPLE five

As shown in fig. 1 to fig. 2, the difference between the air curtain range hood of the present embodiment and the above embodiments is: the air curtain range hood introduced by the invention comprises an air curtain device forming an air curtain, wherein the air curtain device comprises an air storage part with a cavity structure, the air storage part is arranged along at least one edge of the range hood, one side of the air storage part, which is close to the outer part of the range hood, is provided with at least one air outlet, and each air outlet comprises at least one air outlet unit which can independently realize the adjustment/control of the working state. According to the air curtain range hood introduced by the invention, the generation position of the air curtain is designed, so that the air outlet is arranged along a plurality of positions of the range hood, the air outlet is further divided into air outlet units, and the plurality of air outlet units belonging to the same air outlet are continuously arranged, so that the range hood can shield oil smoke in a plurality of directions. The shielded oil smoke is not only the oil smoke generated by the corresponding cooking range, but also the oil smoke generated by other nearby cooking ranges. The air outlet can be a continuous strip-shaped hole structure, and the air outlet unit can divide the air outlet into a plurality of units.

EXAMPLE six

The air curtain device of the air curtain range hood comprises a fan device for providing power for generating air curtain airflow, and the fan device is arranged in one-to-one correspondence with the air outlets. The power source of the air curtain device is designed. The fan devices for generating the air curtain airflow can be arranged in a one-to-one correspondence manner with the air outlets, and when the corresponding air outlets need to be opened, the corresponding fan devices are opened, so that the supply of the air curtain airflow is ensured. The fan device is provided in the air storage portion.

EXAMPLE seven

The difference between the air curtain range hood described in this embodiment and the above embodiments is: the air curtain device comprises a fan device for providing power for generating air curtain airflow, and the fan device corresponds to a plurality of air outlets of the air curtain device. The air outlets can share one fan device, the air ducts of the air outlets are communicated to form an air storage part, and when the fan device operates, air curtain airflow can be provided for the air outlets simultaneously. The air outlet is arranged flexibly. There is not enough space to place the air curtain device and the air outlet can be also provided.

Example eight

The difference between the air curtain range hood described in this embodiment and the above embodiments is: the air storage part is a through annular cavity/broken line type cavity, and the air storage part is arranged along the circumferential direction of the range hood and is close to the position of the lower side of the range hood. The air curtain device comprises an adjusting unit for controlling the working state of the air outlet unit, and the adjusting unit realizes the opening and closing of the air outlet unit and/or the air volume adjustment and/or the wind direction adjustment by changing the relative position of the adjusting unit and the air outlet unit. The adjusting units are arranged in one-to-one correspondence with the air outlet units. The air outlet unit is controlled one to one through the adjusting unit. And opening only the position where the air curtain needs to be generated, and further generating the air curtain. The position where the air curtain is not required to be generated is closed.

Example nine

As shown in fig. 1, the difference between the air curtain range hood of the present embodiment and the above embodiments is: at least part of the power of the air flow required by the air curtain device for forming the air curtain is provided by the fan device, the air curtain device is arranged in a cavity formed by the shell 1 of the air curtain range hood, and the air curtain device is of a structure with a through cavity inside. Through the air curtain range hood introduced by the embodiment, the air flow source of the air curtain device is improved, so that at least one part of the gas discharged by the range hood is guided into the air curtain device to become the air flow source of the air curtain. The gas entering the air curtain device has kinetic energy instead of relying on the kinetic energy provided by the air curtain device, so that the energy required for forming air curtain airflow is obviously reduced, and the energy conservation and environmental protection are facilitated. Further, the air curtain range hood that this embodiment introduced sets up the air curtain device in range hood's inside, can hide the air curtain device effectively, avoids causing the influence to range hood's outward appearance. In addition, the design can shorten the distance between the air curtain device and the fan device, ensure that the airflow power generated by the fan device can efficiently send the airflow into the air curtain device and is discharged from the air outlet of the air curtain device, and realize the function of the air curtain before the flowing performance of the airflow is obviously reduced.

Further, in the air curtain range hood introduced in this embodiment, the air inlet 21 of the air inlet portion is communicated with the fan cavity 32, and the air inlet 21 of the air inlet portion is arranged facing the airflow direction in the air duct 32 of the fan device; preferably, the angle between the direction of the air inlet 21 of the air inlet part and the air flow direction in the fan cavity 32 ranges from 90 degrees to 180 degrees. Through the air curtain range hood that this embodiment introduced, the orientation to the air intake of air inlet portion has been designed for during fan device combustion gas can push the air curtain device more efficient, avoid blocking that air curtain device self structure led to the fact the air current and make the air current lose the flow property.

Example ten

As shown in fig. 1, the difference between the air curtain range hood of the present embodiment and the above embodiments is: the air inlet 21 of the air inlet part is connected with the position adjacent to the air outlet 33 of the fan device. Because the position air current kinetic energy of fan unit air outlet 33 is the biggest, the air current performance of this position is also the most stable to, under the inside purifier that is provided with of range hood, the air current of this position is the gas that has been fully purified, and the oil smoke that contains in it is very limited, more is fit for as wind curtain air current.

Further, the air curtain device described in the present embodiment includes an air inlet portion 24 and a guide portion 26 communicating with each other, and the air inlet portion 24 is connected to the fan device so that the air flow in the fan device is guided into the air curtain device. At least a portion of the air inlet portion 24 is disposed within the blower cavity 32. Preferably, the air intake 24 and/or the guide 26 are primarily ducted structures.

Further, in the curtain range hood described in this embodiment, the air inlet portion 24 and the guide portion 26 are connected by the transition portion 25, the axis of the air inlet portion 24 and/or the axis of the guide portion 26 mainly extend along a straight direction, and the transition portion 25 has a certain bending angle, so as to change the airflow direction in the air curtain device. Preferably, the included angle between the extending direction of the guiding portion 26 along the inner airflow direction thereof and the air outlet direction of the air curtain device is 90-180 °. Preferably, the transition 25 is tubular; the air inlet portion 24, the transition portion 25 and the guide portion 26 are integrally formed.

The air curtain range hood introduced by the embodiment designs the structure of the air curtain device, and the structural design of the multiple sections ensures that each section can be matched with other sections while playing the functions. The main functions of the air inlet part are as follows: partial air flow in the fan device is effectively separated, the extending direction of the partial air flow is arranged along the air flow direction in the fan device, the separated air flow can enter the air curtain device under the condition of not changing the flowing direction, and the resistance of the air flow entering the air curtain device is greatly reduced. The design of the guide part and the transition part can effectively change the airflow flowing direction, and the guide part is preferably a tubular structure extending in a straight line direction, so that the airflow resistance in the guide part can be reduced.

EXAMPLE eleven

As shown in fig. 1, the difference between the air curtain range hood of the present embodiment and the above embodiments is: the air curtain device comprises an air storage part 27 for adjusting the distribution of air inside the air curtain device, an air outlet 23 of the air curtain device is arranged on the air storage part 27, and the air storage part 27 forms a part of an air channel of the air curtain device.

Further, in the curtain type range hood described in this embodiment, the cavity inside the air storage portion 27 is annular, and the annular cavity of the air storage portion 27 is disposed around the air suction opening (the lower middle portion of the structure shown in fig. 1) of the air curtain type range hood.

Through the air curtain range hood introduced by the embodiment, the design of the air storage part is added, so that the airflow led out from the fan device is led into the air storage part, and the airflow direction is redistributed, so that the airflow is discharged from the air curtain device from a proper position. The air storage part is of an annular structural design, the air suction opening of the range hood is arranged at an annular central position, the air outlets of the air curtain device can be arranged at a plurality of positions around the air suction opening, the flexible arrangement of the air outlet position of the air curtain device is facilitated, and even if the position is narrow and small and the structure is complex, the air outlet of the air curtain device can be arranged.

Further, in the curtain range hood described in this embodiment, the cavity inside the air storage portion 27 includes a smoke collection cavity cover plate 4 enclosing a smoke collection cavity, a shell member 11 connected to the smoke collection cavity cover plate 4 at the periphery of the smoke collection cavity cover plate 4, and a sealing member 5 arranged opposite to the smoke collection cavity cover plate 4 and connected to the shell member 11. The number of housing members 11 and/or smoke collection chamber cover plates 4 and/or closures 5 is at least one. Preferably, the guide 26 communicates with the cavity inside the reservoir 27 through the closure 5/smoke collection chamber cover plate 4/housing member 11. The air storage part 27 is designed to be formed by the equipment smoke collection cavity cover plate 4 and a part of the shell at intervals, so that the space of the equipment is effectively utilized, more functions are given to equipment parts, and the arrangement of an air curtain device is prevented from increasing the structural burden of the equipment.

Further, in the curtain range hood described in this embodiment, the air outlet direction of the air outlet 23 of the air curtain device is adjustable. The air outlet 23 of the air curtain device is provided with an air deflector (not shown in the figure), and the extension direction of the air deflector is adjustable. Preferably, the number of the air outlets 23 of the air curtain devices is multiple, and the air outlets 23 of the multiple air curtain devices are arranged around the smoke collecting cavity of the air curtain range hood.

Example twelve

As shown in fig. 1, the difference between the air curtain range hood of the present embodiment and the above embodiments is: the air curtain device comprises an impurity removal unit 6 for purifying the air in the air channel inside the air curtain device. Preferably, the trash removal unit 6 is connected to the guide portion 26. The design of the impurity removal unit is added, so that the cleanliness of air curtain airflow can be further ensured.

Further, in the curtain type range hood described in this embodiment, the impurity removing unit 6 is connected to a side of the guide portion 26 close to the air storage portion 27. The air inlet of the impurity removing unit far away from the air inlet part is enabled to a certain degree, and the blockage of the air flow entering the air curtain device due to the arrangement of the impurity removing unit is avoided.

Further, the curtain range hood that this embodiment introduced, its edulcoration unit includes the edulcoration unit switch (not shown in the figure) that is used for controlling edulcoration unit operating condition, and edulcoration unit switch control edulcoration unit is whether insert in the wind channel of air curtain device. When the switch of the impurity removal unit is triggered to be in an opening state, the impurity removal unit is connected into the air duct of the air curtain device, and the impurity removal function is achieved. When the switch of the impurity removal unit is triggered to be in a closed state, the impurity removal unit is connected out of the air duct of the air curtain device. The impurity removal unit is connected with the air outlet duct, so that the airflow resistance in the air curtain device can be reduced, and the airflow fluidity of the air curtain device is increased.

Further, in the curtain range hood described in this embodiment, the switch of the impurity removal unit controls the degree of the impurity removal unit accessing the air duct of the air curtain device. The edulcoration unit in this embodiment includes multilayer structure, and each layer all can realize certain edulcoration function. Preferably, the structure of the multilayer impurity removing units is the same, and the number of layers of the impurity removing units connected into the air curtain device air channel can be controlled by the switch of the impurity removing units. When the multi-layer impurity removal unit is connected into the air channel, the impurity removal function is achieved together, and the impurity removal effect is guaranteed. When the number of layers of the impurity removal unit connected into the air channel is small, the minimum flowing loss of the air flow can be ensured. Wherein the impurity removing unit can be a device with a filtering function.

Further, in the curtain range hood described in this embodiment, the impurity removing unit may be a deflectable sheet structure disposed in the air duct of the air curtain device. When the impurity removal function is realized, the lamellar structure is turned to form a certain angle (preferably vertical) with the airflow direction; when the impurity removal function is not required, the lamellar structure is turned to be parallel to the airflow direction.

EXAMPLE thirteen

The difference between the air curtain range hood of the embodiment and the above embodiments is as follows: the air curtain device comprises a switch part for controlling the on-off of an air channel inside the air curtain device. The switch part for controlling the on-off of the air duct is added, so that a user can select the presence or absence of the air curtain.

Further, the curtain range hood introduced in this embodiment has the switch portion disposed on the guide portion. Preferably, the switching part performs on/off control by a pressure difference between both ends thereof. The switch part of the air curtain device is designed as a pressure control switch, and when the air pressure in the fan device reaches a certain degree, the equipment automatically opens the air curtain device. The air pressure in the fan device is improved, so that the suction force of the range hood is increased, the fan is adjusted to a higher gear, the oil smoke overflow risk is increased, the air curtain is matched at the moment, and the air curtain device is automatically opened. When the wind pressure in the fan device is reduced to a certain value, the switch part is closed.

Example fourteen

The difference between the air curtain range hood of the embodiment and the above embodiments is as follows: at least one part of the switch part of the air curtain device is arranged at the outer side of the air curtain range hood, and a user can perform trigger operation on the switch part so as to realize the air curtain function of closing/opening the air curtain device.

Further, the air curtain range hood in the embodiment includes a position obtaining unit for obtaining the position of the user. The gas condition acquisition device comprises an atmosphere acquisition switch unit for controlling whether the gas condition acquisition device is turned on or not.

Further, in the air curtain range hood in 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 obtaining unit obtains that the first distance between the user and the air curtain range hood reaches/does not reach the corresponding threshold value, the atmosphere obtaining switch unit controls the air curtain device and/or the impurity removing unit and/or the gas condition obtaining device to be turned on/off and/or prompts an obtaining result and/or prompts an operation suggestion.

Further, in the air curtain range hood in this embodiment, when the position acquisition unit acquires that the first distance from the user to the air curtain range hood reaches or does not reach the corresponding threshold value, the impurity removal unit is controlled to improve the impurity removal capability, reduce the impurity removal capability, and/or prompt an acquisition result and/or prompt an operation suggestion. Preferably, the first distance is a distance between an air curtain air outlet of the air curtain range hood and a user.

The air curtain range hood introduced by the embodiment is additionally provided with the position acquisition unit. Preferably, the position acquisition unit is connected with the air curtain device, and when the state of the human body acquired by the position acquisition unit reaches a threshold value, the air curtain device is controlled to be opened. Or, the switch unit is connected with the position acquisition unit, and when the state of the human body acquired by the position acquisition unit reaches a threshold value, the gas condition acquisition device is controlled to be started. This control is beneficial to reducing the burden of the system.

In addition, in the air curtain range hood introduced in this embodiment, the position obtaining unit is not only used for bringing the position of the user into one of the conditions for controlling the opening of the air curtain, but also used for limiting the specific action mode of the air curtain range hood. On the one hand, the air curtain can be judged whether to be meaningful to the user through the air outlet of the air curtain or the distance between the equipment and the user. If the user is near the apparatus, the user may be affected by the oil smoke or the water vapor. Alternatively, when the user is located in the vicinity of the apparatus, the user is likely to be affected by the oil smoke or the water vapor.

Example fifteen

The difference between the air curtain range hood of the embodiment and the above embodiments is as follows: the position acquisition unit controls the working state of the impurity removal unit and/or prompts the acquisition result and/or prompts an operation suggestion according to the first distance and the result acquired by the gas condition acquisition device.

Further, in the air curtain range hood in this embodiment, the position obtaining unit obtains the first distance and a result obtained by the gas condition obtaining device, determines whether the gas condition of the air curtain airflow affects a user, and if the determination result is yes, adjusts a working state of the impurity removing unit and/or prompts an obtaining result and/or prompts an operation suggestion.

Example sixteen

The difference between the air curtain range hood of the embodiment and the above embodiments is as follows: the method comprises the following steps: an air curtain device for forming an air curtain, a gas condition acquisition device for acquiring the composition/content of the gas component. The atmosphere acquisition device comprises a first gas condition acquisition device for acquiring the gas composition/content of the working area of the air curtain range hood and a second gas condition acquisition device for acquiring the gas composition/content of the non-working area of the air curtain range hood. The working area comprises at least one part of the air suction range of the air suction inlet of the air curtain range hood, and the non-working area comprises at least one part 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 and the parts above.

The air curtain range hood introduced by the embodiment defines a working area and a non-working area. The environment around the range hood is divided into at least two parts. The vicinity of the air suction opening is used as a working area, the position is within the range of the suction force of the range hood, the gas at the position is sucked into the range hood to a greater extent, and the gas at the position can indicate the target gas composition of the range hood.

Further, the air curtain range hood described in this embodiment includes a fan device that generates an air flow. And the control device is connected with 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 according to the data acquired by the gas condition acquisition device. And the control device controls the working state of the gas condition acquisition device and/or the air curtain device according to the working state of the fan device. Preferably, the operating state of the air curtain device includes an on and/or off state. And when the fan device is in an off state, the control device closes the gas condition acquisition device and/or the air curtain device.

Example seventeen

The difference between the air curtain range hood of the embodiment and the above embodiments is as follows: the adjustment basis of the control device is data generated by the air curtain device and/or the gas condition acquisition device at the same time. Preferably, the data is real-time data and the adjustment is a real-time adjustment.

Or the adjustment of the control device is based on data generated by the air curtain device and/or the gas condition acquisition device in the same time period. Preferably, the data is a calculated value within a prescribed time, and the adjustment is an intermittent adjustment. Further preferably, the prescribed time includes a time automatically acquired by the device and/or a time set by the user.

With the air curtain range hood described in this embodiment, the data obtained by the gas condition obtaining device can be obtained in real time, and the control basis of the control device can be real-time data or calculation data within a certain time period, such as average value calculation. The design enriches the control mode of the equipment, and the specific implementation mode can be automatically set by the system or selected by a user.

EXAMPLE eighteen

The difference between the air curtain range hood of the embodiment and the above embodiments is as follows: the first gas condition obtaining device generates first data according to the working area gas, and the control device adjusts the working state of the air curtain device and/or prompts an obtaining result and/or prompts an operation suggestion according to the first data. Preferably, when the first data reaches or does not reach the corresponding threshold value, the air curtain device is controlled to be opened/closed and/or the acquisition result is prompted and/or the operation suggestion is prompted.

Through 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 (corresponding to the situation where the oil smoke is severe), the air curtain is selected to be opened no matter what the second data is. At this time, considering that the oil smoke is serious, if the oil smoke is not opened, the risk of oil smoke leakage to a non-working area is increased, and the use environment of a user is influenced. When the range hood works to a certain moment, the relation between the first data and the second data meets the condition of 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 closes the air curtain or advises a user to close the air curtain, so that the oil smoke in a non-working area is sucked into the range hood, and the overall environment improvement is realized.

Example nineteen

The difference between the air curtain range hood of the embodiment and the above embodiments is as follows: the first gas condition acquisition device generates first data according to the gas in the working area, and the second gas condition acquisition device generates second data according to the gas in the non-working area; and the control device judges according to the first data, the second data and the corresponding threshold value, and adjusts the working state of the air curtain device and/or prompts the judgment result and/or prompts the operation suggestion according to 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 be opened and/or the result of judgment is prompted and/or the suggestion of opening the air curtain device is prompted.

Further, if the comparison result between the first data and the second data does not exceed the corresponding threshold value, the air curtain device is adjusted to be closed and/or the judgment result is prompted and/or the suggestion that the air curtain device is closed is prompted. At least one part of the second gas condition acquisition device is arranged on one side of the air curtain range hood facing the user.

Through the air curtain range hood introduced by the embodiment, the first data and the second data are compared, if the difference between the first data and the second data is not large, the fact that oil smoke exists in a non-working area is also indicated, and the effect of generating the air curtain to protect a user is small at the moment. At the moment, the air curtain is closed or the user is advised to close the air curtain so as to suck away the oil smoke in the non-working area. Furthermore, the non-working area is defined as the area where the user is located and the front of the range hood and the cooking bench, so that the environment where the user is located can be fully brought into the investigation range.

Example twenty

The difference between the air curtain range hood of the embodiment and the above embodiments is as follows: the device comprises an impurity removing device arranged in an impurity removing unit in the air curtain device, and an impurity removing capability judging device for judging the impurity removing capability of the impurity removing device according to data obtained by the gas condition obtaining device. When the edulcoration device performance was not enough for the edulcoration ability, probably there was the edulcoration device to need change abluent condition, perhaps, was the heavier condition of near cooking utensils oil smoke this moment, and the fan device of adjustment equipment increases the ability of induced drafting this moment. The invention further introduces an impurity removal device/impurity removal unit with adjustable impurity removal capability, and the combination of the impurity removal device/impurity removal unit introduced by the invention enables the air curtain range hood to control the impurity removal capability of the impurity removal device/impurity removal unit according to the result obtained by the gas condition obtaining device, so that the impurity removal effect under different use conditions is ensured.

Further, the gas condition obtaining device in this embodiment includes a working area gas condition obtaining device for obtaining the composition/content of the gas component in the working area of the air curtain range hood and an air duct gas condition obtaining device for obtaining the composition/content of the gas component in the air duct of the air curtain range hood. The air duct comprises an air curtain air duct of an air curtain device. The gas condition acquisition device is designed to at least comprise a working area gas condition acquisition device and an air channel gas condition acquisition device, so that the target gas composition condition in the working area and the gas composition condition in the air channel are comprehensively considered, and the cleaning effect of the impurity removal device on the target substance can be effectively shown. At this time, the air duct gas condition acquisition device is preferably arranged on one side of the impurity removal device communicated with the air duct outlet.

Further, the duct gas condition obtaining device in this embodiment includes an air curtain duct gas condition obtaining device for obtaining the composition/content of the gas component in the air curtain duct. The air duct gas condition acquisition device comprises a first air duct gas condition acquisition device for acquiring the side, moving towards the impurity removal unit, of the air flow in the air curtain air duct. And the impurity removal capability judging device compares the data acquired by the first air duct gas condition acquiring device with the data acquired by the working area gas condition acquiring device, and when the comparison result of the two data does not exceed a threshold value, the impurity removal capability of the impurity removal device is good. According to the air curtain range hood introduced by the embodiment, the first air channel gas condition acquisition device is additionally arranged in the air channel of the air curtain device and used for inspecting the air flow quality of the air curtain, and the inspected result can be that the air flow quality of the air curtain is good and the air curtain can be normally used; or the quality of the air curtain airflow is poor, and the impurity removal capability of the corresponding impurity removal device and/or the impurity removal unit is adjusted according to the first air channel gas condition acquisition device, or the user is prompted about the condition of poor quality. Further, when the impurity removal capability of the impurity removal device and/or the impurity removal unit is adjusted to the limit set by the system, the current situation of the user is prompted, and the user is reminded to check.

The difference between the air curtain range hood described in this embodiment and the above embodiments is: the air duct gas condition acquisition device comprises an air curtain air duct gas condition acquisition device for acquiring the composition/content of gas components in the air curtain air duct; the air duct gas condition acquisition device comprises a second air duct gas condition acquisition device for acquiring one side of the air curtain air duct, which deviates from the movement of the impurity removal unit, of the air flow.

Further, the impurity removal capability determining device in this embodiment compares the data acquired by the second air duct gas condition acquiring device with the data acquired by the working area gas condition acquiring device, and when a comparison result between the two does not exceed a threshold value, the impurity removal capability of the impurity removal device and/or the impurity removal unit is good.

The second air flue gas condition acquisition device is additionally arranged in the air flue of the air curtain device, and the data acquired by the second air flue gas condition acquisition device is compared with the data acquired by the working area gas condition acquisition device, so that the further investigation on the impurity removal capability of the impurity removal device and/or the impurity removal unit can be realized. The investigation result is more intuitive.

The air duct gas condition acquisition device comprises an air curtain air duct gas condition acquisition device for acquiring the composition/content of gas components in the air curtain air duct; the air duct gas condition acquisition device comprises a first air duct gas condition acquisition device for acquiring one side of the air curtain air duct, which moves towards the impurity removal unit, of the air flow; the air duct gas condition acquisition device comprises a second air duct gas condition acquisition device for acquiring one side of the air curtain air duct, which deviates from the movement of the impurity removal unit, of the air flow.

Further, the impurity removal capability determining device in this embodiment compares the data acquired by the first air duct gas condition acquiring device with the data acquired by the second air duct gas condition acquiring device, and when a comparison result between the two does not exceed a threshold value, the impurity removal capability of the impurity removal unit is good. And comparing the data between the first air channel gas condition acquisition device and the second air channel gas condition acquisition device, so that the impurity removal capability of the impurity removal unit can be independently inspected.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (8)

1. An air curtain range hood, which is characterized by comprising:

the air curtain device is used for forming an air curtain and comprises at least two air outlet units which are arranged at different positions and can independently realize the adjustment of the working state;

the air curtain device comprises an air curtain extractor hood, a gas condition acquisition device, a control device and a control device, wherein the air curtain extractor hood is used for controlling the working state of the air curtain device and/or prompting the gas condition of the surrounding environment and/or prompting an operation suggestion according to the gas condition in the surrounding environment of the air curtain extractor hood;

the gas condition acquisition device comprises an atmosphere acquisition switch unit for controlling whether the gas condition acquisition device is started or not;

the position acquisition unit is used for acquiring the position of a user, is connected with the atmosphere acquisition switch unit and controls the working state of the gas condition acquisition device;

when the position acquisition unit acquires that the first distance between the user and the air curtain range hood reaches or does not reach the corresponding threshold value, the atmosphere acquisition switch unit controls the air curtain device and/or the gas condition acquisition device to be turned on/off and/or prompts an acquisition result and/or prompts an operation suggestion;

the gas condition acquisition device comprises a first gas condition acquisition device for acquiring the composition and the content of the gas components in the working area of the air curtain range hood and a second gas condition acquisition device for acquiring the composition and the content of the gas components in the non-working area of the air curtain range hood;

the working area comprises at least one part of the air suction range of the air suction inlet of the air curtain range hood, and the non-working area comprises at least one part 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 according to the gas in the working area, and the second gas condition acquisition device generates second data according to the gas in the non-working area; if the comparison result between the first data and the second data exceeds the corresponding threshold value, adjusting the air curtain device to be started and/or prompting the judgment result and/or prompting the suggestion of starting the air curtain device; and if the comparison result between the first data and the second data does not exceed the corresponding threshold value, adjusting the air curtain device to be closed and/or prompting the judgment result and/or prompting the suggestion of closing the air curtain device.

2. The air curtain range hood according to claim 1, wherein at least two adjacent air outlet units form an air outlet, and the air outlet is an outlet of the air curtain and has a continuous structure;

the number of the air outlets is at least two.

3. The air curtain range hood according to claim 2, wherein the gas condition obtaining device obtains conditions of different gas components respectively;

the gas condition acquisition device comprises an oil smoke acquisition module for acquiring oil smoke content and a moisture acquisition module for acquiring moisture content;

the gas condition acquisition device comprises a plurality of oil smoke acquisition modules and moisture acquisition modules which are arranged at intervals;

when the data acquired by the oil smoke acquisition module exceeds the corresponding oil smoke threshold value, starting an air curtain device corresponding to the oil smoke acquisition module; when the data acquired by the oil smoke acquisition module does not exceed the corresponding oil smoke threshold, further judging whether the numerical value acquired by the moisture acquisition module exceeds the corresponding moisture threshold;

the oil smoke threshold is more than or equal to the water threshold.

4. The air curtain range hood according to claim 1, wherein the gas condition obtaining device judges validity of the gas condition obtained by the gas condition obtaining device at the current stage, and when the obtained gas condition is invalid, the air curtain device is controlled to work according to the gas condition at the previous stage and/or the ambient gas condition is prompted and/or an operation suggestion is prompted.

5. The air curtain range hood according to claim 4, wherein the gas condition obtaining device uses the stability of the obtained gas condition as one of the criteria for judging whether the obtained gas condition is effective or not;

and when the fluctuation condition of the gas condition at the current stage is within the corresponding stability threshold range, judging the data to be valid data, otherwise, judging the data to be invalid data.

6. The air curtain range hood of claim 5, wherein the fluctuation condition comprises a degree of deviation of the gas condition from historical data;

and when the fluctuation condition exceeds the corresponding historical data deviation degree threshold value, judging the data to be invalid.

7. The air curtain range hood of claim 5, wherein the fluctuation condition includes an accumulated time for the gas condition to exceed its standard value;

the value range of the standard value of the gas condition is 60-90% of the average value or the maximum value of the working area condition data.

8. The air curtain range hood of claim 1, wherein the air curtain device comprises a fan device for providing power for generating the air curtain airflow, and at least part of the power for absorbing the oil smoke of the range hood is provided by the fan device.

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