CN110836396B - Method for controlling effective distance of air curtain range hood - Google Patents
Method for controlling effective distance of air curtain range hood Download PDFInfo
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- CN110836396B CN110836396B CN201810941311.6A CN201810941311A CN110836396B CN 110836396 B CN110836396 B CN 110836396B CN 201810941311 A CN201810941311 A CN 201810941311A CN 110836396 B CN110836396 B CN 110836396B
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000000779 smoke Substances 0.000 claims description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000002035 prolonged effect Effects 0.000 claims description 9
- 230000002829 reductive effect Effects 0.000 claims description 7
- 239000004615 ingredient Substances 0.000 claims description 6
- 238000004904 shortening Methods 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 230000003111 delayed effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 16
- 239000007789 gas Substances 0.000 description 44
- 238000010411 cooking Methods 0.000 description 17
- 238000009792 diffusion process Methods 0.000 description 11
- 239000003517 fume Substances 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000006233 lamp black Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000011194 food seasoning agent Nutrition 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2028—Removing cooking fumes using an air curtain
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses an effective distance control method for an air curtain of an air curtain range hood, which controls the effective distance of a shielding air curtain by controlling an included angle between a first air curtain and a second air curtain which form the shielding air curtain. The method for controlling the effective distance of the air curtain range hood introduced by the invention can effectively control the working distance of the shielding air curtain and simultaneously can not influence the shielding effect of the shielding air curtain.
Description
Technical Field
The invention belongs to the field of kitchen air purification equipment, and particularly relates to an effective air curtain distance control method of an air curtain range hood.
Background
In the air curtain range hood in the prior art, an air curtain is arranged between a user and a pot and between the user and a cooking bench to isolate the user from oil smoke. However, the temperature of the oil fume is higher after the oil fume is generated at a position close to the pot opening, the components of the oil and the water are in a gaseous state, the density of the oil fume and the water is lower than that of air in the surrounding environment, the rising trend of the oil fume and the water is very obvious, and the oil fume is shielded without an air curtain within a certain distance close to the pot opening. In addition, the air curtain airflow at the position downward relative to the vertical direction drives the air at the pot opening position to flow downward, so that the air pressure at the pot opening position is reduced, and the upward diffusion of the oil smoke is influenced. The kitchen environment is limited, the space of the cooking bench is more limited, and the air flowing phenomenon around the kitchen environment caused by the air curtain can influence the gas environment in the working area (above the cooking bench) of the range hood to different degrees. Therefore, the working effect of the range hood can be influenced by the overlarge action range of the air curtain airflow in the vertical direction. Furthermore, in the cooking process, the hands and arms of the user mostly act near the cooking bench or near the pot opening, and the large part of the air curtain flow inevitably blows on the hands and arms of the user, so that the user is uncomfortable. Particularly, some users are sensitive to airflow, and the skin temperature environment and the airflow environment in the vicinity of the same area cause allergic reactions. Therefore, how to reasonably control the effective distance of the air curtain airflow and avoid the problem that the invalid air curtain influences the oil smoke to rise or causes discomfort of a user becomes urgent to be solved.
The present invention has been made in view of this situation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for controlling the effective distance of an air curtain range hood, which can effectively control the working distance of a shielding air curtain and simultaneously can not influence the shielding effect of the shielding air curtain.
In order to solve the technical problems, the invention adopts the technical scheme that:
an effective distance control method for an air curtain of an air curtain range hood controls the effective distance of a shielding air curtain by controlling the included angle between a first air curtain and a second air curtain which form the shielding air curtain.
The invention is further configured to: the method reduces/increases the effective distance of the shielding air curtain by increasing/decreasing the included angle between the first air curtain and the second air curtain;
preferably, the included angle comprises an included angle of the airflow directions of the initial ends of the first air curtain and the second air curtain;
preferably, the included angle includes an included angle between the central axes of the initial airflows of the first air curtain and the second air curtain.
The invention is further configured to: the range hood is provided with a gas condition acquisition device at one side facing a user, and the range hood controls the effective distance of the shielding air curtain according to the data acquired by the gas condition acquisition device;
preferably, the gas conditions include: ingredient make up and/or amount and/or time any ingredient is held at a certain amount.
The invention is further configured to: when the content of the target component acquired by the gas condition acquisition device reaches a corresponding first threshold value, starting an air curtain device for generating a shielding air curtain/prolonging the effective distance of the shielding air curtain;
preferably, the target component comprises: oil smoke, gas.
The invention is further configured to: when the content of the non-target component acquired by the gas condition acquisition device reaches a corresponding second threshold value, the effective distance of the shielding air curtain is prolonged;
preferably, the non-target components include: water vapor;
preferably, if the content of the target component reaches the reference value of the first threshold value and the content of the non-target component reaches the corresponding second threshold value, the air curtain device for generating the shielding air curtain is started/the effective distance of the shielding air curtain is prolonged, the preset time is kept, and the shielding air curtain state before adjustment is returned;
preferably, the reference value is 60% to 90% of the first threshold value.
The invention is further configured to: and when the duration time exceeds the corresponding time threshold value, starting an air curtain device for generating the shielding air curtain/prolonging the effective distance of the shielding air curtain.
The invention is further configured to: when the gas condition acquisition device judges that the content of the current target component reaches a corresponding first threshold value and the content of the non-target component reaches a corresponding second threshold value, the air curtain device for generating the shielding air curtain is started/the effective distance of the shielding air curtain is prolonged, and the fan device of the range hood is started/the oil smoke absorption efficiency of the fan device is increased;
preferably, after the adjusted operating state of the range hood is kept for a set time, the gas condition is obtained again, and whether the gas condition reaches a corresponding threshold value is judged; if the gas condition reaches the corresponding threshold value, the working state of the range hood is adjusted again;
preferably, the operating state of the range hood comprises an operating state of an air curtain device for generating a shielding air curtain and/or an operating state of a fan device.
The invention is further configured to: the gas condition acquisition device acquires the gas condition before the fan device is started every time, and if the content of the current target component reaches a corresponding first threshold value and/or the content of the non-target component reaches a corresponding second threshold value, the starting time of the air curtain device for generating the shielding air curtain is delayed or the effective distance of the shielding air curtain is shortened;
preferably, the delay time is ≧ 5 s.
The invention is further configured to: after delaying the starting time of an air curtain device generating a shielding air curtain or shortening the effective distance of the shielding air curtain, judging whether the content of the current target component reaches a corresponding first threshold value or whether the content of the non-target component reaches a corresponding second threshold value in real time/at set time intervals, and if so, keeping the current working state of the air curtain device; if not, the working state of the air curtain device is adjusted according to the data currently acquired by the gas condition acquisition device.
The invention is further configured to: the method controls the effective distance of the shielding air curtain by controlling the strength of the air flow of the first air curtain and/or the second air curtain constituting the shielding air curtain.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.
1. By the method for controlling the effective distance of the air curtain range hood, the working distance of the shielding air curtain is effectively controlled, and meanwhile, the shielding effect of the shielding air curtain is not influenced. A certain included angle is formed between the first air curtain and the second air curtain which form the shielding air curtain, and the shielding air curtain is of a conical structure with a large top and a small bottom. Guarantee the shielding effect to the shielding effect that the region that need not carry out the oil smoke shielding weakens the air curtain avoids causing the discomfort to the user, also avoids blowing away the flame of cooking utensils.
2. The effective distance of the shielding air curtain is adjusted by taking the gas condition of the surrounding environment as the basis through the method for controlling the effective distance of the air curtain range hood introduced by the invention. Making the adjustment more targeted.
3. By the method for controlling the effective distance of the air curtain range hood introduced by the invention, different gas components are respectively considered, corresponding countermeasures are only taken for gases which are easy to cause user discomfort, such as oil smoke, and the like, and the evaluation standard is looser for gases which are not easy to generate user discomfort, such as water vapor.
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 schematic view of a portion of an air curtain range hood according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of the region B' shown in FIG. 1 in an embodiment of the present invention;
FIG. 3 is a schematic view of the structure of the region B' shown in FIG. 1 according to another embodiment of the present invention;
FIG. 4 is a schematic view of the structure of the region B' shown in FIG. 1 according to another embodiment of the present invention;
FIG. 5 is a schematic view of the structure of the region B' shown in FIG. 1 according to another embodiment of the present invention;
FIG. 6 is a bottom view of the air curtain range hood in one embodiment of the present invention;
FIG. 7 is a bottom view of an air curtain range hood in another embodiment of the present invention;
FIG. 8 is a schematic view of an air deflector of the air curtain range hood according to another embodiment of the present invention;
fig. 9 is a schematic structural view of an air deflector of an air curtain range hood in another embodiment of the invention.
In the figure: 1', an air curtain device; 11', a first air curtain device; 12', a second air curtain device; 111' and a first air outlet; 112' and a second air outlet; 1110', a first air curtain; 1120', a second air curtain; 2', a shell; 3', an air suction opening; 4', an air deflector; 41', a primary air deflector; 42', a secondary air deflector; α', shielding angle; a', front side/front/side facing the user of the air curtain range hood.
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 discloses an effective distance control method for an air curtain of an air curtain range hood, which controls the effective distance of a shielding air curtain by controlling an included angle between a first air curtain and a second air curtain which form the shielding air curtain. The effective distance control method of the air curtain requires that the air curtain device for generating the air curtain at least has two air outlets arranged at intervals, and different air outlets are different at least in air outlet positions. Two air outlets can be arranged on one device, and air outlets can also be arranged on two different air curtain devices respectively. The first air curtain and the second air curtain are respectively interacted through the two air outlets, and the shielding air curtain for shielding oil smoke is formed jointly.
Example one
In the method for controlling the effective distance of the air curtain range hood, the effective distance of the shielding air curtain is reduced/increased by increasing/reducing the included angle between the first air curtain and the second air curtain. It can be understood that the air curtain airflow inevitably generates the phenomenon of airflow diffusion along with the increase of the flowing distance in the flowing direction of the air curtain airflow, so that the air curtain airflow is not concentrated any more, and when the distance between the two air curtain airflows is relatively close, the airflows mutually influence and have the tendency of being close to each other. The tendency of such interaction between the two air streams is more pronounced the further the air curtain stream is from its beginning. The technical scheme of this embodiment is through the mode of the contained angle before two bundles of air curtains of control, and the position that two bundles of air curtains take place influence each other is adjusted. The air curtain device air outlet required by the technical scheme in the embodiment can be fixed in relative position, and the deflection direction of the air deflector positioned at the air outlet can be controlled.
Further, the control method in this embodiment may control the included angle by controlling the airflow direction of only one of the first air curtain and the second air curtain.
Further, the evaluation manner of the included angle in this embodiment may be various, and may be an included angle between the airflow directions of the starting ends of the first air curtain and the second air curtain or an included angle between the central axes of the airflow at the starting ends of the first air curtain and the second air curtain. Or when the included angle between the first air curtain and the second air curtain is smaller than 30 degrees, evaluating by means of the included angle between the central axes of the air flows at the starting ends of the first air curtain and the second air curtain; and when the included angle between the first air curtain and the second air curtain is larger than 30 degrees, evaluating the included angle between the air flow directions of the starting ends of the first air curtain and the second air curtain or the included angle between the central axes of the air flows of the starting ends of the first air curtain and the second air curtain.
Preferably, the included angle ranges from 0 ° to 30 °.
Example two
The difference between the method for controlling the effective air curtain distance of the air curtain range hood in the embodiment and the embodiments is as follows: the air curtain range hood is provided with a gas condition acquisition device on one side facing a user, and the range hood controls the effective distance of the shielding air curtain according to the data acquired by the gas condition acquisition device. The side of the air curtain range hood facing the user is the front side of the range hood, as indicated by a' in fig. 1. The position is the position of the head of the user, and the operating environment of the user can be fully characterized. If the gas condition detected at the position is judged to be reduced in adverse/adverse effect on the user, the air curtain device is correspondingly adjusted to increase/reduce the shielding effect of the shielding air curtain. Preferably, the acquiring operation of the gas condition acquiring means is real-time acquisition/acquisition at intervals,
preferably, the gas conditions include: ingredient make up and/or amount and/or time any ingredient is held at a certain amount.
EXAMPLE III
The difference between the method for controlling the effective air curtain distance of the air curtain range hood in the embodiment and the embodiments is as follows: and when the content of the target component acquired by the gas condition acquisition device reaches a corresponding first threshold value, starting an air curtain device for generating the shielding air curtain/prolonging the effective distance of the shielding air curtain. The first threshold may be divided into a plurality of different levels, and the shielding air curtain is adjusted when the content of the target component obtained by the gas condition obtaining device reaches the first threshold of the corresponding level, for example, if the first threshold of the higher level represents a higher oil smoke content, the increase of the extension distance of the shielding air curtain is larger. The gas condition acquisition device in the embodiment can continuously keep the working state when the equipment does not perform oil smoke absorption work. In some cases, the user forgets to turn on the range hood due to negligence, and the like, and at this time, it is necessary to shield the lampblack.
Preferably, the target component comprises: oil smoke, gas.
Further, the gas condition acquiring device in this embodiment has a self-checking function, and periodically detects the gas condition of the periodic environment when detecting that the blower device does not operate for a long time, preferably, the detection is performed a plurality of times at intervals. If the content of the target component is judged to reach the corresponding first threshold value in a large proportion of the detection results of multiple times, the possibility that the gas condition acquisition device is stained is indicated, and a user is prompted to clean the gas condition acquisition device when the lower side fan device starts.
Example four
The difference between the method for controlling the effective air curtain distance of the air curtain range hood in the embodiment and the embodiments is as follows: still alternatively, the present embodiment is different from the first embodiment in that: and when the content of the non-target components acquired by the gas condition acquisition device reaches a corresponding second threshold value, the effective distance of the shielding air curtain is prolonged. It can be seen that, for the content of the non-target gas, when it exceeds the second threshold, only the operation of extending the effective distance of the shielding air curtain without turning on the air curtain device is performed. The technical scheme in the embodiment takes different control measures aiming at different gas components. If the air curtain device is not opened, the fact that the user can accept the non-target gas is indicated, and the working state of the air curtain device is not adjusted.
Preferably, the non-target components include: water vapor.
Further, in this embodiment, when the content of the target component reaches the reference value of the first threshold and the content of the non-target component reaches the corresponding second threshold, the air curtain device for generating the shielding air curtain is turned on/the effective distance of the shielding air curtain is extended, and the shielding air curtain state before the adjustment is returned after the predetermined time. Preferably, the reference value is 60% to 90% of the first threshold value. Comprehensively considering the target components and the non-target components, and investigating whether the comprehensive effect of the target components and the non-target components causes discomfort to the user. The reference value can be divided into a plurality of levels, and can be set by a user or automatically set by a system. When the system automatically sets the reference, the operation time of the air curtain range hood needs to be evaluated, and if the operation time of the air curtain range hood is greater than the standard accumulated value, the reference value is not less than 70%; if the running time of the air curtain range hood is less than the standard accumulated value, the reference value is not more than 70%, except the condition set by the user.
EXAMPLE five
The difference between the method for controlling the effective air curtain distance of the air curtain range hood in the embodiment and the embodiments is as follows: and when the duration time exceeds the corresponding time threshold value, starting an air curtain device for generating the shielding air curtain/prolonging the effective distance of the shielding air curtain. The technical scheme in the embodiment fully considers the condition that the atmosphere in the environment is possibly fluctuated or temporarily influenced by user operation, for example, in the process of stewing, the air curtain does not need to be opened due to the fact that the pot cover is kept in a closed state for a long time. When the user adds the seasoning while opening the pot lid, it is not necessary to open the air curtain device because this operation is a temporary, non-continuous operation. The technical solution in this embodiment can completely eliminate such a situation.
EXAMPLE six
The difference between the method for controlling the effective air curtain distance of the air curtain range hood in the embodiment and the embodiments is as follows: and when the gas condition acquisition device judges that the content of the current target component reaches a corresponding first threshold value and the content of the non-target component reaches a corresponding second threshold value, the air curtain device for generating the shielding air curtain is started/the effective distance of the shielding air curtain is prolonged, and the fan device of the range hood is started/the oil smoke absorption efficiency of the fan device is increased. It can be known that the temperature of the water vapor generated in the cooking process is high, and the specific heat capacity of the water is large, so that the oil smoke is still in a state of being heated by the water vapor when being diffused to a certain degree, and the oil smoke has obvious diffusion capacity. That is, the water vapor has a promoting effect on the diffusion of the soot. Under certain cooking conditions, steam and oil smoke can be generated simultaneously, or two cooking ranges of the double ranges respectively execute different cooking operations to respectively generate the steam and the oil smoke. At this moment, the diffusion capacity of the oil smoke is obvious, and the fan device is adjusted while the air curtain device is adjusted, so that the oil smoke is sucked away while the shielding effect on the oil smoke is increased.
Further, in the method of this embodiment, after the adjusted operating state of the range hood is maintained for a set time, the gas condition is obtained again, and whether the gas condition reaches a corresponding threshold value is determined; and if the gas condition reaches the corresponding threshold value, correspondingly adjusting the working state of the range hood again. The oil smoke is the diffusion that continues under the drive of vapor, and this situation needs the range hood high suction gear condition under the sufficient time of work after can alleviating, and the design of the setting time in this embodiment can guarantee to avoid the gas parameter in the environment to get rid of the oil smoke and cause the influence when getting rid of the oil smoke high efficiency, is fully taken away at the oil smoke, later continues to investigate whether to adjust the operating condition of range hood again. Preferably, the operating state of the range hood comprises an operating state of an air curtain device for generating a shielding air curtain and/or an operating state of a fan device.
EXAMPLE seven
The difference between the method for controlling the effective air curtain distance of the air curtain range hood in the embodiment and the embodiments is as follows: the gas condition obtaining device obtains the gas condition before the fan device is started every time, and if the content of the current target component reaches a corresponding first threshold value and/or the content of the non-target component reaches a corresponding second threshold value, the starting time of the air curtain device generating the shielding air curtain is delayed or the effective distance of the shielding air curtain is shortened. When the range hood is used, the situation described in the embodiment occurs, which indicates that the oil smoke is diffused into the surrounding environment before the range hood is opened, and the environment is polluted at this time. If the air curtain device is opened, the air curtain device can shield gas components such as oil smoke in the environment out of the suction action range of the range hood, so that the range hood can remove the oil smoke above the cooking bench, the oil smoke in the environment cannot be removed, and a user can still be damaged by the oil smoke. According to the technical scheme in the embodiment, the suction action range of the range hood is expanded by means of delaying the opening time of the air curtain device for generating the shielding air curtain or shortening the effective distance of the shielding air curtain, and the oil smoke above the cooking bench is sucked away and simultaneously drives the air flow in the surrounding environment to remove the oil smoke in the environment. Preferably, the delay time is ≧ 5 s.
Example eight
The difference between the method for controlling the effective air curtain distance of the air curtain range hood in the embodiment and the embodiments is as follows: after delaying the starting time of an air curtain device generating a shielding air curtain or shortening the effective distance of the shielding air curtain, judging whether the content of the current target component reaches a corresponding first threshold value or whether the content of the non-target component reaches a corresponding second threshold value in real time/at set time intervals, and if so, keeping the current working state of the air curtain device; if not, the working state of the air curtain device is adjusted according to the data currently acquired by the gas condition acquisition device. If the adjustment of delaying the opening timing of the air curtain device generating the shielding air curtain or shortening the effective distance of the shielding air curtain to the working state of the air curtain device is to be directed to the special condition that the environment is polluted, and if the condition that the environment is polluted is relieved after a period of time, the adjustment to the special condition is to be released. The technical scheme in the embodiment can solve the technical problem.
Example nine
The difference between the method for controlling the effective air curtain distance of the air curtain range hood in the embodiment and the embodiments is as follows: the method controls the effective distance of the shielding air curtain by controlling the strength of the air flow of the first air curtain and/or the second air curtain constituting the shielding air curtain. The technical scheme in this embodiment controls the effective distance of the shielding air curtain by controlling the difference in the flow velocity of the air flow between the first air curtain and the second air curtain. When the distance between the two air curtain air flows is kept unchanged, the flow speed of one air curtain air flow is increased, the flow speed difference between the two air curtain air flows is changed, and the air curtain air flow with the lower flow speed is entrained and scattered by the air curtain air flow with the higher flow speed. The control method requires that the range hood comprises two air curtain air outlets capable of providing different air curtain airflow flow rates. The first air curtain for shielding oil smoke is arranged on one side close to an exhaust inlet of the range hood, the second air curtain is used for controlling the air supply distance of the first air curtain, and the second air curtain is arranged on one side close to a user.
Preferably, the second air curtain has an airflow velocity greater than the airflow velocity of the first air curtain and the second air curtain has an airflow volume less than the airflow volume of the first air curtain. The second air curtain can well control the air supply distance of the first air curtain, and meanwhile, discomfort can not be caused to the user.
Example ten
As shown in fig. 1 to 7, the present embodiment introduces an air curtain range hood, which includes an air curtain device for generating a shielding air curtain, wherein the air curtain device 1' controls an effective distance of an air flow of the shielding air curtain by controlling a section size of the shielding air curtain in a moving direction thereof. The effective distance of the air curtain airflow generated by the air curtain device 1' is adjustable, and the adjustment mode can be automatic control of the range hood or automatic manual adjustment by a user according to actual conditions. The air supply distance (effective distance of air curtain airflow) of the shielding air curtain is only in the range where the oil smoke begins to diffuse, and the air curtain airflow is blocked (scattered) at the position where the oil smoke cannot diffuse, so that the influence of the air curtain airflow on flames near a pot opening and on a cooking bench and the body of a user is avoided. The air curtain range hood introduced in the invention shields the oil smoke only at the position where the oil smoke has the diffusion phenomenon through the shielding air curtain. Thereby avoiding the pressure difference between the working area of the range hood (below the range hood, above the cooking bench and in the suction range of the range hood) and the surrounding environment (the position of the user) caused by the shielding air curtain function, and avoiding the negative influence caused by the range hood sucking the oil smoke.
The shielding curtain includes first 1110 'and 1120' second curtains intersecting in the direction of movement of the shielding curtain. The shielding air curtain in this embodiment is composed of two parts, the first air curtain 1110 'and the second air curtain 1120' are both independent and can provide a certain shielding effect for the diffusion of the oil smoke, and the two air curtains form a certain angle with each other to jointly form the shielding air curtain for shielding the oil smoke. In this embodiment, the first air curtain 1110 'and the second air curtain 1120' are relatively distant from each other at a position close to the air outlet of the air curtain device, and at this position, the cross-sectional size of the shielding air curtain in the moving direction (downward direction shown in fig. 2) is relatively large, and the flow directionality of the air curtain airflow at this position is relatively good, so that a good shielding effect on the oil smoke can be achieved. During practical use, the trend of upward diffusion of the oil smoke near the pot opening is obvious, almost no diffusion phenomenon exists, and the oil smoke does not need to be strictly shielded at the moment, so that the section size of the air curtain at the position in the moving direction of the air curtain is small. In the position far from the pot opening (the position close to the exhaust inlet of the range hood), because the oil smoke is diffused in a certain distance and is in contact with the surrounding environment to a certain degree, the temperature of the oil smoke is also reduced, so that the trend of diffusing to the periphery or moving upwards is reduced, and the oil smoke shielding is necessarily enhanced in the position. The technical scheme in this embodiment can be directed at the top of workspace, and the effect that the oil smoke shields is pointed to the position that the oil smoke begins to diffuse.
Further, in this embodiment, the distance from the intersecting position of the first air curtain 1110 'and the second air curtain 1120' to the air outlet of the air curtain device is the effective distance of the air curtain airflow/shielding air curtain. The intersecting positions of the axes of the first air curtain 1110 'and the second air curtain 1120' are different due to their respective moving directions, so that they collide with each other to scatter the air curtain flow to some extent, and there is no obviously concentrated air curtain flow at the position below the intersecting position (along the flowing direction of the original shielding air curtain). The impact of air curtain airflow can be avoided from influencing the flame and the directional diffusion of oil smoke at the boiler opening.
EXAMPLE eleven
As shown in fig. 1 to 7, the difference between the air curtain range hood of the present embodiment and the above embodiments is: an included angle between the central axis of the first air curtain 1110 ' and the central axis of the second air curtain 1120 ' is a shielding angle α '. The device/user can adjust the blowing distance of the shielding air curtain by adjusting the shielding angle alpha'. When the shielding angle α 'is larger, the blowing distance of the shielding air curtain is larger, and when the shielding angle α' is smaller, the blowing distance of the shielding air curtain is smaller. Preferably, the shielding angle α' is an acute angle. When the shielding angle α 'is adjusted, the device/user may specifically adjust only the air outlet angle of the first air curtain 1110'/the second air curtain 1120 ', or may adjust both the first air curtain 1110' and the second air curtain 1120 ', and the combined result of the adjustment of the two determines the size of the shielding angle α'. The degree of adjustment is controlled by the device/user at his or her discretion.
Further, in the air curtain device of this embodiment, the effective distance of the shielding air curtain airflow is adjusted by adjusting the directions of the central axis of the first air curtain 1110 'and the central axis of the second air curtain 1120'. When the shielding angle α ' is adjusted by the device, there may be a case where the shielding angle is not suitable to be obtained, and in this case, the shielding angle may be controlled by controlling the extending directions of the central axes of the first air curtain 1110 ' and the second air curtain 1120 ', respectively.
Further, the air curtain device 1 'in this embodiment adjusts the sectional size of the shielding air curtain in the moving direction thereof by controlling the shielding angle α'. It can be seen that, in actual use, the most direct effect of shielding the oil smoke of the air curtain is evaluated by measuring the section size of the air curtain, and the section size of the shielding air curtain can be used as the basis for controlling the shielding angle when the device/user controls the air curtain device.
Example twelve
As shown in fig. 4, the difference between the air curtain range hood of the present embodiment and the above embodiments is: the air curtain device includes a first air curtain device 11 'for generating the first air curtain 1110' and a second air curtain device 12 'for generating the second air curtain 1120'. The number of the air curtain devices in this embodiment is two, and the two air curtain devices are respectively used for generating different parts of the shielding air curtain. In actual use, since the air curtain is generated by two air curtain devices, the device/user can perform respective control for different air curtain devices, for example, adjust the air supply direction and the air supply amount respectively.
Further, as shown in fig. 5, the first air curtain device 11 'in this embodiment is disposed between the second air curtain device 12' and the user, the first air curtain device 11 'protrudes out of the plane formed by the second air curtain device 12' in a direction away from the range hood, and when the air curtain range hood is in a use state, the air outlet of the first air curtain device is disposed relatively below the second air curtain device. Then, the starting point of the outlet air of the two air curtain devices is different at the position corresponding to the air outlet. It can be understood that the directivity of the flow of the air curtain airflow is better at a position relative to the outlet of the air curtain device, the worse the directivity of the flow of the air curtain airflow as the air supply distance increases. The air outlet of the second air curtain device 12' in this embodiment is relatively close to the upper portion of the working area, so as to ensure that the air curtain (not only the shielding air curtain, but also the second air curtain on one side can achieve a good shielding effect) at the position and within a certain distance from the position has a good oil smoke shielding effect, while the first air curtain device at the relative position close to the outer side gives the second air curtain an acceleration effect through the generated first air curtain under the condition that the air flow of the air curtain has a certain weakening tendency, and the two air curtain devices at the intersection position, the air flow velocity of the first air curtain is greater than that of the second air curtain, the first air curtain tends to blow away the second air curtain, so that the blown-away air curtain air flow has a flow velocity toward the upper portion of the cooking bench which is smaller and relatively more divergent in the flow direction, and the blown-away air flow just supplements the low pressure caused by the oil smoke sucked by the range hood, the efficiency of the lampblack absorber for absorbing lampblack is not reduced due to the prolonging of time. The direction far away from the range hood in the embodiment is vertical and downward when the range hood is in a working state.
Further, the first air curtain device 11 'and the second air curtain device 12' in the present embodiment are the same in structure or mirror image.
EXAMPLE thirteen
As shown in fig. 2, the difference between the air curtain range hood described in this embodiment and the above embodiments is: the air curtain device 1 ' includes a first air outlet 111 ' and a second air outlet 112 ' that are correspondingly disposed, the first air outlet 111 ' is used for generating the first air curtain 1110 ', and the second air outlet 112 ' is used for generating the second air curtain 1120 '. The technical scheme in this embodiment only need an air curtain fan can, only make partial adjustment to the air outlet part of air curtain device can, the air curtain device structure in this embodiment is simpler. The adjustment of the air outlet direction of different air outlets can be carried out by adjusting the air deflector arranged at the air outlet of the air curtain device.
As shown in fig. 8, the air deflectors at the air outlet position may be two air deflectors arranged outside the air outlet and opposite to each other, and the two air deflectors 4' respectively define the direction of the air curtain corresponding to the two air deflectors. Alternatively, as shown in fig. 9, the air deflectors at the air outlet may be two primary air deflectors 41 'disposed outside the air outlet and disposed oppositely, and two secondary air deflectors 42' disposed on opposite sides of the two air outlets, where the size of the secondary air deflectors 42 'along the air curtain airflow direction is smaller than the size of the primary air deflectors 41' in the direction.
Further, the first outlet 111 'and the second outlet 112' in this embodiment have the same structure or are arranged in a mirror image.
Further, in this embodiment, the first air outlet 111 'is disposed between the second air outlet 112' and the user, the first air outlet 111 'protrudes out of the plane formed by the second air outlet 112' in a direction away from the range hood, and the direction away from the range hood is vertical and downward when the range hood is in the operating state
Example fourteen
As shown in fig. 1 to 7, the difference between the air curtain range hood of the present embodiment and the above embodiments is: the dimension of the outlet/first outlet 111 'of the first air curtain device 11' along the length direction thereof is larger than the dimension of the outlet/second outlet 112 'of the second air curtain device 12' along the length direction thereof. When the user is in the cooking operation state, the front oblique upward direction of the user is the range hood, and the air outlet of the air curtain device is the left and right direction of the user along the length direction of the air outlet. As shown in fig. 6 and 7, in the embodiment, the length direction (defining the width direction of the blocking air curtain) of the outlet/first outlet 111 'of the first air curtain device 11' is greater than or equal to the dimension of the outlet/second outlet 112 'of the second air curtain device 12', so that even if the shielding air curtain starts to diverge after a certain distance of operation, the first air curtain can effectively shield the divergent air flow from the user, and no omission occurs.
Further, at least part of the air outlet in this embodiment is in a shape of a strip hole. Preferably, the extending direction of the air outlet/first air outlet 111 'of the first air curtain device 11' is parallel to the extending direction of the air outlet/second air outlet 112 'of the second air curtain device 12'.
Further, the air outlet/first air outlet 111 'of the first air curtain device 11' and the air outlet/second air outlet 112 'of the second air curtain device 12' in the present embodiment are arranged in parallel along the length direction thereof (with respect to the left-right direction of the user during cooking).
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 (10)
1. A method for controlling the effective distance of an air curtain range hood is characterized in that the effective distance of a shielding air curtain is controlled by controlling the included angle between a first air curtain and a second air curtain which form the shielding air curtain;
the range hood is provided with a gas condition acquisition device at one side facing a user, and the range hood controls the effective distance of the shielding air curtain according to the data acquired by the gas condition acquisition device;
when the content of the target component acquired by the gas condition acquisition device reaches a corresponding first threshold value, the effective distance of the shielding air curtain is prolonged;
and/or when the content of the non-target component acquired by the gas condition acquisition device reaches a corresponding second threshold value, the effective distance of the shielding air curtain is prolonged;
the target component includes: oil smoke, gas; the non-target components include: water vapor.
2. The method for controlling the effective distance of the air curtain range hood according to claim 1, wherein the effective distance of the shielding air curtain is reduced/increased by increasing/reducing the included angle between the first air curtain and the second air curtain;
the included angle comprises an included angle of the airflow directions of the starting ends of the first air curtain and the second air curtain;
or the included angle comprises an included angle between the central axes of the initial end airflows of the first air curtain and the second air curtain.
3. The method for controlling the effective distance of the air curtain range hood according to the claim 1 or 2,
the gas conditions include: ingredient make up and/or amount and/or time any ingredient is held at a certain amount.
4. The method for controlling the effective air curtain distance of an air curtain range hood according to claim 1,
if the content of the target component reaches the reference value of the first threshold value and the content of the non-target component reaches the corresponding second threshold value, the effective distance of the shielding air curtain is prolonged, and the shielding air curtain state before adjustment is returned after the preset time is kept;
the reference value is 60% -90% of the first threshold value.
5. The method for controlling the effective distance of the air curtain range hood according to claim 1, wherein the gas condition obtaining device starts to calculate the duration time of the state when judging that the content of the current target component reaches a corresponding first threshold or the content of the non-target component reaches a corresponding second threshold, and when the duration time exceeds a corresponding time threshold, the effective distance of the shielding air curtain is prolonged.
6. The method for controlling the effective air curtain distance of the air curtain range hood according to claim 1 or 5, wherein the gas condition obtaining device prolongs the effective shielding air curtain distance and starts a fan device of the range hood or increases the oil smoke absorption efficiency of the fan device when judging that the content of the current target component reaches a corresponding first threshold value and the content of the non-target component reaches a corresponding second threshold value.
7. The method for controlling the effective air curtain distance of the air curtain range hood according to claim 6,
keeping the adjusted working state of the range hood for a set time, then acquiring the gas condition again, and judging whether the gas condition reaches a corresponding threshold value; if the gas condition reaches the corresponding threshold value, the working state of the range hood is adjusted again;
the working state of the range hood comprises the working state of an air curtain device for generating a shielding air curtain and/or the working state of a fan device.
8. The method for controlling the effective air curtain distance of the air curtain range hood according to claim 6,
the gas condition acquisition device acquires the gas condition before the fan device is started every time, and if the content of the current target component reaches a corresponding first threshold value and/or the content of the non-target component reaches a corresponding second threshold value, the starting time of the air curtain device for generating the shielding air curtain is delayed or the effective distance of the shielding air curtain is shortened;
the delay time is more than or equal to 5 s.
9. The method for controlling the effective distance between the air curtains of the air curtain range hood according to claim 8, wherein after delaying the starting time of the air curtain device generating the shielding air curtain or shortening the effective distance of the shielding air curtain, the real-time/interval setting time is used for judging whether the content of the current target component reaches a corresponding first threshold value or whether the content of the non-target component reaches a corresponding second threshold value, if so, the current working state of the air curtain device is maintained; if not, the working state of the air curtain device is adjusted according to the data currently acquired by the gas condition acquisition device.
10. The method for controlling the effective distance between the air curtains of the air curtain range hood according to claim 1, wherein the method controls the effective distance between the shielding air curtains by controlling the airflow intensity of the first air curtain and/or the second air curtain constituting the shielding air curtain.
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| CN201810941311.6A CN110836396B (en) | 2018-08-17 | 2018-08-17 | Method for controlling effective distance of air curtain range hood |
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| CN201072180Y (en) * | 2007-08-07 | 2008-06-11 | 浙江朗迪集团股份有限公司 | Air curtain generating device of ventilator |
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| CN201209905Y (en) * | 2008-05-09 | 2009-03-18 | 裘晓钟 | Air curtain shielding kitchen ventilator |
| CN201917035U (en) * | 2010-12-14 | 2011-08-03 | 金亿翔企业股份有限公司 | Air curtain device |
| CN107702308A (en) * | 2017-10-02 | 2018-02-16 | 广东美的制冷设备有限公司 | Deep bead, air conditioner room unit and air conditioner |
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| CN201072180Y (en) * | 2007-08-07 | 2008-06-11 | 浙江朗迪集团股份有限公司 | Air curtain generating device of ventilator |
| CN101285601A (en) * | 2008-02-21 | 2008-10-15 | 胡述斌 | Fume-collecting hood adjustable type frequency conversion intelligent fume exhauster |
| CN201209905Y (en) * | 2008-05-09 | 2009-03-18 | 裘晓钟 | Air curtain shielding kitchen ventilator |
| CN201917035U (en) * | 2010-12-14 | 2011-08-03 | 金亿翔企业股份有限公司 | Air curtain device |
| CN107702308A (en) * | 2017-10-02 | 2018-02-16 | 广东美的制冷设备有限公司 | Deep bead, air conditioner room unit and air conditioner |
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