CN110836398B - 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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- CN110836398B CN110836398B CN201810941314.XA CN201810941314A CN110836398B CN 110836398 B CN110836398 B CN 110836398B CN 201810941314 A CN201810941314 A CN 201810941314A CN 110836398 B CN110836398 B CN 110836398B
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- air curtain
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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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Abstract
The invention discloses a method for controlling the effective distance of an air curtain range hood, wherein an air curtain device comprises the following steps: the shielding air curtain unit is used for generating a shielding air curtain which is used for shielding oil smoke; and the blocking air curtain unit is used for generating a blocking air curtain, generating an air outlet angle of the blocking air curtain unit for blocking the air curtain through control, and controlling an air outlet distance of the shielding air curtain unit for generating 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 air curtain distance control method for an air curtain of an air curtain range hood is characterized in that the air outlet distance of a shielding air curtain unit for generating a shielding air curtain is controlled by controlling the air outlet angle of the blocking air curtain unit for generating the blocking air curtain.
The invention is further configured to: the included angle between the air outlet direction of the blocking air curtain unit and the air outlet direction of the shielding air curtain unit ranges from 0 degree to 60 degrees;
preferably, the angle between the flow directions of the shielding air curtain and the blocking air curtain at least at their respective starting ends is in the range of 0 ° to 60 °.
The invention is further configured to: the air curtain range hood comprises a blocking control module for controlling the air outlet angle of the blocking air curtain unit; the blocking control module is connected with a fan device which generates suction force for the range hood, and controls the air outlet angle of the blocking air curtain unit according to the working state of the fan device;
preferably, the working state of the fan device includes an on/off state of the fan device, a gear of the fan device, a working power of the fan device, a working time of the fan device at any gear, and an accumulated working time of the fan device.
The invention is further configured to: the blocking control module acquires the working state change condition of the fan device, and if the working state of the fan device tends to increase/decrease the strength of the suction force, the blocking control module adjusts the air outlet angle of the blocking air curtain unit to decrease/increase the angle between the blocking air curtain and the shielding air curtain;
preferably, the blocking control module acquires the working state change condition of the fan device at real time/interval preset time.
The invention is further configured to: the blocking control module acquires the working state change condition of the fan device, judges the relation between the working state change quantity of the fan device and a corresponding threshold value, and adjusts the air outlet angle of the blocking air curtain unit if the change quantity reaches the corresponding threshold value; and if the variable quantity does not reach the corresponding threshold value, keeping the wind outlet angle of the current blocking air curtain unit.
The invention is further configured to: the blocking control module acquires the time for the variable quantity to reach the corresponding threshold value; if the keeping time reaches the corresponding time threshold, adjusting the air outlet angle of the blocking air curtain unit;
preferably, if the maintained time does not reach the corresponding time threshold, the wind outlet angle of the currently blocked air curtain unit is maintained.
The invention is further configured to: if the kept time does not reach the corresponding time threshold, waiting for the set time, and executing the judgment of the relation between the working state variation and the corresponding threshold again;
preferably, the set time comprises system automatic setting and/or user selection;
preferably, the set time is set according to the current working condition/working condition adjustment condition/accumulated running time of the fan device under the condition that the system is automatically set;
preferably, if the current working condition of the fan device tends to strong wind power to absorb oil smoke/operate for a long time, the set time is prolonged; if the current working condition of the fan device tends to the weak wind power oil smoke suction/short-time operation, the set time is shortened;
preferably, the long time is more than or equal to 2 min.
The invention is further configured to: and if the kept time does not reach the corresponding time threshold, sending a prompt to the user after waiting for the set time, and inquiring whether to judge the relation between the working state variation and the corresponding threshold or not again or to adjust the air outlet angle of the blocking air curtain unit.
The invention is further configured to: the air outlet of the shielding air curtain unit is adjustable;
preferably, the air curtain range hood comprises a blocking control module for controlling the air outlet angle of the blocking air curtain unit and a shielding control module for controlling the air outlet angle of the shielding air curtain unit; the shielding control module is connected with a fan device which generates suction force for the range hood, and controls the air outlet angle of the shielding air curtain unit according to the working state of the fan device, and the blocking control module controls the air outlet angle of the shielding air curtain unit according to data generated by the blocking control module.
The invention is further configured to: under the control of the shielding control module, if the air outlet angle of the shielding air curtain unit enables the shielding air curtain to be far away from or close to the air suction opening of the range hood, the blocking control module adjusts the air outlet angle of the blocking air curtain unit so as to reduce or increase the included angle between the blocking air curtain and 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 air supply distance of the air curtain is controlled, the shielding effect of the shielding air curtain on oil smoke within the effective distance is ensured, and the shielding effect on the oil smoke cannot be influenced by controlling the distance of the air curtain.
2. According to the method for controlling the effective air curtain distance of the air curtain range hood introduced by the invention, the working state of the air curtain device (comprising the shielding air curtain unit and the blocking air curtain unit) is adjusted according to the working state of the fan device, the working state of the air curtain device comprises the angle of the air outlet of the air curtain device, the automatic control of equipment is realized, and the air supply distance of the shielding air curtain is adjusted according to the oil smoke condition. The adjustment to the air curtain is carried out according to the actual oil smoke environment, and the method is more targeted.
3. According to the method for controlling the effective air curtain distance of the air curtain range hood, before the working state of the air curtain device is adjusted, whether the current fan change is continuous/effective change or not is judged, if the change is system fluctuation or is caused by adjustment of a system/user on equipment, the air curtain device is not adjusted, the burden of the system is avoided being increased, and meanwhile, the negative influence of air curtain adjustment on suction of the fan device can be reduced.
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 area B shown in FIG. 1 according to an embodiment of the present invention;
FIG. 3 is a schematic view of the structure of the area B shown in FIG. 1 according to another embodiment of the present invention;
FIG. 4 is a bottom view of the air curtain range hood in one embodiment of the present invention;
FIG. 5 is a bottom view of an air curtain range hood in accordance with another embodiment of the present invention;
FIG. 6 is a schematic view of the structure of the area B shown in FIG. 1 according to another embodiment of the present invention; .
In the figure: 1. an air curtain device; 111. shielding an air outlet of the air curtain unit; 1110. shielding the air curtain; 112. blocking an air outlet of the air curtain unit; 1120. blocking the air curtain; 2. a housing; 3. an air inlet of the air curtain range hood; α: a blocking angle.
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 air curtain distance control method for an air curtain of an air curtain range hood. Therefore, when the technical scheme of the invention is implemented, the shielding effect of the shielding air curtain is not influenced while the working range of the shielding air curtain is controlled.
Example one
In the method for controlling the effective air curtain distance of the air curtain range hood described in this embodiment, the included angle between the air outlet direction of the blocking air curtain unit and the air outlet direction of the shielding air curtain unit ranges from 0 ° to 60 °. Preferably, the angle between the flow directions of the shielding air curtain and the blocking air curtain at least at their respective starting ends is in the range of 0 ° to 60 °. Aiming at the adjustment of the angle of the air curtain, the deflection angle of the air deflector arranged at the air outlet of each air curtain can be controlled. Because the air curtain has the phenomena of divergence and change of flow direction to a certain degree in the flow process of air flow, when the included angle between the air curtains is controlled, the included angle between the air flow directions at the starting ends of the air curtains (including shielding the air curtain and blocking the air curtain) is preferably controlled. At this point, the air curtain flow is not significantly affected by the environment, and the air flow conditions at this location are sufficient to characterize the included angle between the air curtain flows.
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 comprises a blocking control module for controlling the air outlet angle of the blocking air curtain unit; the blocking control module is connected with a fan device which generates suction force for the range hood, and controls the air outlet angle of the blocking air curtain unit according to the working state of the fan device. The blocking control module is connected with the blocking air curtain unit to control the working state of the blocking air curtain unit. The working state of the fan device is controlled by a user or the range hood is automatically adjusted according to the working environment of the range hood. When the user judges that the oil smoke is too much in the current kitchen environment, the air suction efficiency of the fan device can be adjusted and increased, and the oil smoke can be sucked away more effectively. On the contrary, if the user judges that the current oil smoke condition is not serious, the air suction efficiency of the range hood can be correspondingly reduced. It is thus clear that the operating condition through the fan device can characterize the oil smoke state of kitchen environment. An adjustment relationship is established between the blocking control module and the fan device, so that automatic control of the equipment can be realized. And/or, the blocking control module is connected with a control panel of the range hood, and when a user adjusts the suction force of the range hood through the control panel, the blocking air curtain is synchronously controlled.
Further, the operating state of the fan device in this embodiment includes an on/off state of the fan device, a gear of the fan device, an operating power of the fan device, an operating time of the fan device at any gear, and an accumulated operating time of the fan device. The working state of the blocking air curtain unit can be controlled through the blocking control module, and the air outlet machine angle and the on/off state of the working state of the blocking air curtain unit are controlled.
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: the blocking control module obtains the working state change condition of the fan device, and if the working state of the fan device tends to increase/decrease the strength of the suction force, the blocking control module adjusts the air outlet angle of the blocking air curtain unit so as to decrease/increase the angle between the blocking air curtain and the shielding air curtain. It will be appreciated that the blocking of the shielding air curtain by the blocking air curtain is least effective when the angle between the blocking air curtain and the shielding air curtain is closer to 0 °. When the included angle between the blocking air curtain and the shielding air curtain approaches to 90 degrees, the blocking effect of the blocking air curtain on the shielding air curtain is most obvious. When the included angle between the blocking air curtain and the shielding air curtain is equal to 90 degrees, the shielding air curtain is blocked at the air outlet, and the shielding distance of the shielding air curtain is the minimum. Then, through the technical scheme in this embodiment, when the oil smoke was serious in the operating condition sign environment of fan device, reduce to block the contained angle between air curtain and the shielding air curtain for the shielding distance extension of shielding air curtain, at this moment, shielding air curtain can shield the oil smoke at great within range, guarantees the shielding effect.
Preferably, the blocking control module acquires the working state change condition of the fan device at real time/interval preset time.
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: the blocking control module acquires the working state change condition of the fan device, judges the relation between the working state change quantity of the fan device and a corresponding threshold value, and adjusts the air outlet angle of the blocking air curtain unit if the change quantity reaches the corresponding threshold value; and if the variable quantity does not reach the corresponding threshold value, keeping the wind outlet angle of the current blocking air curtain unit. The adjustment of the operating state of the fan device is sometimes continuous and sometimes discontinuous, and the degree of adjustment is not constant. The working state of the shielding air curtain unit is adjusted only when the adjustment degree meets the condition, so that the aim of better judging the adjustment of the working state of the fan device can be fulfilled. For example, when the operating state of the fan device includes three gears, i.e., low, medium, and high, if the operating state of the fan device is adjusted back and forth between the two gears, the operating state of the shielding air curtain unit is not adjusted. If the working state of the fan device is adjusted back and forth between the middle gear and the high gear, the working state of the shielding air curtain unit is not adjusted. And if the working state of the fan device is adjusted back and forth between the low gear and the high gear, the working state of the shielding air curtain unit is adjusted.
Or, in actual use, the output power of the fan device can be used as a reference. And taking various numerical values of the working state of the fan device when the fan device is static as a standard. When the actual output power of the fan device exceeds the output power of the fan device when the fan device is static, the relation between the magnitude of the exceeding value and the corresponding threshold value is judged.
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: the blocking control module acquires the time for the variable quantity to reach the corresponding threshold value; and if the keeping time reaches the corresponding time threshold value, adjusting the air outlet angle of the blocking air curtain unit. In some cases, the parameter of the operating state of the fan device exceeding the corresponding threshold value is only a temporary condition, for example, caused by the user debugging the device or the fluctuation of the system, and at this time, if the operating state of the shielding air curtain unit is adjusted, the system control burden of the range hood will be obviously increased. On the one hand, adjust the operating condition of shielding air curtain unit, arouse the air current change among the culinary art environment in addition, improper adjustment can be inevitable and cause negative effects to the fan unit absorption oil smoke. And if the keeping time does not reach the corresponding time threshold value, keeping the wind outlet angle of the current blocking air curtain unit.
Further, the holding time in this embodiment is different according to the current working state of the fan device. For example, when the current fan is in a high-level operation, the corresponding retention time is longer, for example, 3 s; if the current fan is in a low gear operation, the corresponding holding time is shorter, for example, 2 s. Considering that the fan is more prone to system-caused fluctuation when the fan runs at a high-grade position, the system control instability of the equipment can be eliminated and errors can be reduced by respectively judging the running conditions of different fan devices through the keeping time.
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 if the kept time does not reach the corresponding time threshold, waiting for the set time, and judging the relation between the working state variation and the corresponding threshold again. Through the technical scheme in the embodiment, the misjudgment of the system state can be further reduced, the system state is verified again after waiting for a preset time aiming at a certain judgment result, and the effectiveness of the filtering operation is judged again while the system error is filtered.
Further, the setting of the time according to this embodiment includes automatic setting of the system and/or user selection. When the user/system needs a higher accuracy of judgment, the set time is selected to be a smaller value.
Further, in the present embodiment, the setting time is set according to the current working condition/accumulated operation time of the fan device under the condition that the system is automatically set. If the fan device is in a severe operating state, for example, in a high gear or in a long-time operation, the hidden danger of the system fluctuating in the operating condition is more obvious due to the gradual rise of the temperature of the system components or the influence of other factors, and at this time, the set time should be prolonged. Or, when the fan device is just started or the operation state is just adjusted, the working state of the fan is unstable, and the set time should be prolonged. Preferably, if the current working condition of the fan device tends to strong wind power oil smoke absorption/long-time running, the set time tends to be prolonged; if the current working condition of the fan device tends to weak wind power oil smoke absorption/short-time operation, the set time tends to be shortened. The low suction means that the fan device is in a low gear and low power operation. The short time can be compared by a time period threshold value set by a user/system, and if the time is smaller than the time period threshold value as a comparison result, the operation is performed for a short time. The strong wind power and the weak wind power are set relative to the power of the range hood and are relative comparison values, and the strong wind power and the weak wind power of the range hood with different powers are set differently; the long time and the short time are time thresholds preset by the system.
Preferably, the long time (time period threshold) is more than or equal to 2 min.
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: and if the kept time does not reach the corresponding time threshold, sending a prompt to the user after waiting for the set time, and inquiring whether to judge the relation between the working state variation and the corresponding threshold or not again or to adjust the air outlet angle of the blocking air curtain unit. Through the technical scheme in the embodiment, the subjective initiative of the user for adjusting the working state of the shielding air curtain unit can be added, so that the adjustment of the working state of the shielding air curtain unit is based on the will of the user.
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: the air outlet of the shielding air curtain unit is adjustable. Therefore, the range hood can adjust the action range of the shielding air curtain unit in the horizontal direction by adjusting the airflow direction of the shielding air curtain, preferably the direction of the starting end of the shielding air curtain. When the oil smoke diffusion tends to be obvious, the shielding air curtain airflow is far away from the air suction opening; when the oil smoke diffusion tends to weaken, the shielding air curtain airflow is close to the air suction opening. Whether the oil smoke diffusion tends to be obvious or not can be represented through the working state of the fan device, or the input signal of the control panel is represented through a user. Or the adjustment of the airflow direction of the shielding air curtain can be carried out by taking a user as a reference object, and when the shielding air flow is too close to the user, the airflow of the shielding air curtain is kept away from the user, so that discomfort to the user is avoided.
Furthermore, the air curtain range hood in the embodiment comprises a blocking control module for controlling the air outlet angle of the blocking air curtain unit and a shielding control module for controlling the air outlet angle of the shielding air curtain unit; the shielding control module is connected with a fan device which generates suction force for the range hood, and controls the air outlet angle of the shielding air curtain unit according to the working state of the fan device, and the blocking control module controls the air outlet angle of the shielding air curtain unit according to data generated by the blocking control module. Preferably, a user position threshold is set in the blocking control module, and when the blocking control module obtains the variation of the working state of the fan device and/or the state of the shielding air curtain unit starting to adjust the shielding air curtain, the blocking control module determines whether the variation of the working state of the fan device and/or the adjustment of the shielding air curtain will cause adverse effects on a user. The judgment mode is to compare the current position of the user with the working state variation of the fan device and/or the adjustment amount of the shielding air curtain, if the judgment result is in the user position threshold range, the judgment result is that the influence is caused to the user, at the moment, the working state variation of the fan device is reduced to a reasonable range and/or the adjustment amount of the shielding air curtain is reduced or a prompt is sent to the user, and the user is asked to judge whether to perform corresponding adjustment.
Example nine
As shown in fig. 1 to 5, the present embodiment introduces an air curtain range hood: including the air curtain device that generates the air curtain, the air curtain device can be through the effective distance of the mode control air curtain air current that blocks it at the middle part of air curtain. The effective distance of the air curtain airflow generated by the air curtain device is adjustable, and the adjusting 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 air curtain is only in the range where the oil smoke begins to diffuse, and the air curtain airflow is blocked at the position where the oil smoke cannot diffuse, so that the influence of the air curtain airflow on flames near a pot opening, on a cooking bench and on 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 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 (where the user is located) caused by the air curtain effect and avoiding the negative influence caused by the range hood sucking the oil smoke.
Example ten
As shown in fig. 1 to 4, the difference between the air curtain range hood of the present embodiment and the above embodiments is: the air curtain device comprises two stages of mechanisms which respectively realize the effective distance of shielding oil smoke and controlling air flow of the air curtain. The portion of the air curtain apparatus that generates the air curtain is separated from the portion that controls the effective distance of the air curtain flow. When the part of control air curtain air current is out of work, the shielding air curtain that equipment generated possesses the effective distance of longer air current, and the shielding air curtain that generates has the function of good shielding oil smoke in the position of air curtain device air outlet, under the effect of the part of the effective distance of control air curtain air current, weakens the air current of shielding air curtain in the non-diffusion zone of oil smoke. This setting for the shielding air curtain has good oil smoke shielding effect in the position (the first half of air curtain) that is close to the air outlet of air curtain device, and the shielding air curtain air current of this part is as good as with the air curtain air current of "one leads to the end" formula among the prior art, all has good shielding effect to the oil smoke, but is located the shielding air curtain for the part of the non-diffusion zone of oil smoke, and the shielding air curtain in this embodiment is then very weak, can understand even not have the concentrated air current to flow, can't with workspace and surrounding environment are kept apart, guarantee to have enough air to supply to the workspace all the time, avoid the workspace to reduce the air current of surrounding environment and get into the workspace owing to the effect of shielding air curtain, influence the atmospheric pressure in the workspace to keep, and then avoid influencing the lampblack absorber to the extraction efficiency of oil smoke.
EXAMPLE eleven
As shown in fig. 1 to 5, the difference between the air curtain range hood of the present embodiment and the above embodiments is: the difference between the air curtain range hood described in this embodiment and the above embodiments is: the air curtain device comprises a shielding air curtain unit for generating a shielding air curtain and a blocking air curtain unit for generating a blocking air curtain, wherein the shielding air curtain is used for shielding oil smoke, and the blocking air curtain is used for controlling the effective distance of the air flow of the shielding air curtain. The mechanism for generating the shielding airflow by the air curtain device and the mechanism for controlling the blocking airflow for shielding the airflow are integrated in the air curtain device, so that the space of the range hood cannot be increased, the range hood occupies the space, the shielding air curtain and the blocking air curtain share one airflow source, and the structure of the air curtain device is simplified. When the technical scheme in the embodiment is implemented, the technical scheme in the embodiment can be applied to any range hood with an air curtain device in the prior art. And the structure of the range hood does not need to be adjusted. And the air curtain device in the implementation can not provide special requirements for the installation position of the air curtain device of the range hood, thereby increasing the application range of the technical scheme in the embodiment. The shielding air curtain unit and the blocking air curtain unit belong to the same air curtain device, but can be separately controlled, and the air curtain device can be used for adjusting the shielding air curtain unit alone or adjusting the blocking air curtain unit alone.
Further, the functions of the shielding air curtain unit and the blocking air curtain unit in this embodiment are both implemented by generating a certain amount of directional airflow, and the air curtain device may be provided with only one air curtain fan to provide airflow for the shielding air curtain unit and the blocking air curtain unit at the same time.
Example twelve
As shown in fig. 3, the difference between the air curtain range hood of the present embodiment and the above embodiments is: the blocking air curtain unit is arranged close to one side, facing a user, of the shielding air curtain unit. According to the technical scheme in the embodiment, the blocking air curtain is separated from the user by the shielding air curtain, so that the blocking air curtain is far away from the user in the stroke (relative to the position close to the upper part) of the blocking air curtain, and the user cannot be influenced. And, block that the air curtain breaks up the back with shielding air curtain, the air curtain air current that scatters (block air curtain air current and shielding air curtain air current) all has the trend to the diffusion of user direction, but the air curtain has been broken up this moment, and the air current direction can not be too concentrated, can not blow to the user with very big impact on one's body, is difficult for arousing user's discomfort. And the oil fume can not be blown towards the pot mouth, the oil fume flow which is not diffused can not be influenced, and the flame combustion of the cooker can not be influenced.
Further, the effective distance of the air curtain in this embodiment refers to: curtain airflow intensity/airflow velocity/airflow volume decay to 30% to 70% of the corresponding initial volume at the air outlet of the curtain device. The specific data may be determined by the device manufacturer at the time of control programming of the device.
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 shielding air curtain unit is arranged close to one side of the blocking air curtain unit facing a user. The technical scheme in this embodiment will block that one side setting that the air curtain is close to the user will be, then the size space that leans on the position relatively in the assurance workspace that can be better increases the coverage of lampblack absorber inlet scoop. And, the technical scheme in this embodiment, block the air curtain and block the back with shielding air curtain, the air current of breaing up can be to the within range diffusion of workspace (not concentrated blow to the workspace), because range hood's suction effect, the reduction of workspace internal gas pressure often can the indefinite degree, along with range hood's live time's extension, the trend that workspace atmospheric pressure reduces can be more and more obvious, the resistance of absorbing the oil smoke can be bigger and more, the scattered air current that is produced by the air curtain of breaing up (including shielding air curtain and blocking air curtain) fills the workspace, compensate the air of being taken away, guarantee range hood's work efficiency. Further, the technical scheme in the embodiment can also reduce the influence of the air curtain on the user to a great extent.
Example fourteen
As shown in fig. 1 to 5, the difference between the air curtain range hood of the present embodiment and the above embodiments is: the blocking air curtain unit and the shielding air curtain unit in the embodiment are all nonspecific air curtain devices, and can be switched by automatic control of a system of equipment or selection of a user under a certain condition, namely, the shielding air curtain unit can be switched to be the blocking air curtain unit, and the blocking air curtain unit can be switched to be the shielding air curtain unit.
Further, in this embodiment, at least a portion of the air outlet of the blocking air curtain unit and/or the shielding air curtain unit is in a shape of a strip hole, and a dimension of the air outlet of the blocking air curtain unit along a length direction thereof is greater than a dimension of the air outlet of the shielding air curtain unit in the direction. 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 blocking air curtain unit is the left-right direction of the user along the length direction of the blocking air curtain unit. In the embodiment, the distance in the length direction of the blocking air curtain (the span direction of the blocking air curtain is limited) is greater than or equal to the distance in the direction of the shielding air curtain, so that the blocking air curtain can be effectively blocked in the direction, and omission is avoided.
Further, the air outlets of the shielding air curtain unit and the blocking air curtain unit in the present embodiment are arranged in parallel along the length direction thereof (with respect to the left and right direction of the user during cooking). The blocking effect of the blocking air curtain on the shielding air curtain at each position is consistent, and the structural design is the simplest design. The projection of the air outlet of the shielding air curtain unit on one side of the air curtain range hood close to the user does not exceed the range of the projection of the air outlet of the blocking air curtain unit on one side of the air curtain range hood close to the user.
Example fifteen
As shown in fig. 1 to 5, the difference between the air curtain range hood of the present embodiment and the above embodiments is: the air curtain device controls the effective air flow distance of a shielding air curtain generated by the air curtain device through a generated blocking air curtain, and the shielding air curtain is used for shielding oil smoke. The shielding air curtain and the blocking air curtain form an included angle which is a blocking angle. The device/user can adjust the blowing distance of the shielding air curtain by adjusting the blocking angle. When the blocking angle is larger, the air supply distance of the shielding air curtain is larger, and when the blocking angle is smaller, the air supply distance of the shielding air curtain is smaller. Preferably, the blocking angle is acute.
Further, the airflow direction of the shielding air curtain and/or the blocking air curtain in the embodiment is adjustable. The airflow directions of the shielding air curtain and the blocking air curtain can be adjusted independently or can be adjusted in a coordinated mode. When the shielding air curtain is adjusted or blocked independently, the blocking angle changes, which causes the air supply distance of the shielding air curtain to change. Or when the shielding air curtain and the blocking air curtain are adjusted simultaneously, the change of the blocking angle can be controlled by different adjustment amounts of the shielding air curtain and the blocking air curtain.
Example sixteen
As shown in fig. 6, the difference between the air curtain range hood of the present embodiment and the above embodiments is: in this embodiment, the blocking air curtain unit 12 is disposed between the shielding air curtain unit 11 and the user, the blocking air curtain unit 12 protrudes from the plane formed by the shielding air curtain unit 11 in the direction away from the range hood, and when the air curtain range hood is in a use state, the air outlet of the blocking air curtain unit is disposed relatively close to the lower side. 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 shielding air curtain unit 11 in this embodiment is relatively close to the upper portion of the working area, so as to ensure that the shielding air curtain at this position and the air curtain within a certain distance from this position (not only shielding air curtain, but also blocking air curtain at one side can achieve good shielding effect), while the blocking air curtain unit at the opposite position close to the outside can accelerate the blocking air curtain through the generated shielding air curtain when the air flow of the air curtain has a certain weakening tendency, and the air flow of the shielding air curtain is higher than that of the blocking air curtain at the intersection position of the shielding air curtain and the blocking air curtain, so that the shielding air curtain tends to blow away the blocking air curtain, and the air flow of the blown away air curtain flows toward the upper portion of the cooking bench at a lower flow rate and in a relatively divergent flow direction, and these blown away air flows just supplement the low pressure caused by the oil smoke sucked away 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. Fig. 6 is an example, and in practical use, the shielding air curtain unit may be designed to protrude from a plane formed by the blocking air curtain unit in a direction away from the range hood (downward direction shown in fig. 6).
Example seventeen
As shown in fig. 6, the difference between the air curtain range hood of the present embodiment and the above embodiments is: the angles/air-out angles of the air outlets of the shielding air curtain unit and the blocking air curtain unit in the embodiment are adjustable, and the adjustment can be performed through the air deflectors arranged corresponding to the air outlets.
Further, the dimension of the air outlet of the blocking air curtain unit in the direction pointing to the air suction inlet (the width direction, the dimension of the width direction is smaller than the dimension of the length direction) is smaller than the dimension of the shielding air curtain in the direction. The outlet opening of the blocking air curtain is thinner than the outlet opening of the shielding air curtain. The air pressure at the air outlet of the blocking air curtain unit is larger, the flow rate of air flow is larger, and the control effect on the shielding air curtain is better.
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 air outlet distance of a shielding air curtain unit for generating a shielding air curtain is controlled by controlling the air outlet angle of the blocking air curtain unit for generating the blocking air curtain;
the air curtain range hood comprises a blocking control module for controlling the air outlet angle of the blocking air curtain unit; the blocking control module is connected with a fan device which generates suction force for the range hood, and controls the air outlet angle of the blocking air curtain unit according to the working state of the fan device;
the blocking control module acquires the working state change condition of the fan device, and if the working state of the fan device tends to increase the strength of the suction force, the blocking control module adjusts the air outlet angle of the blocking air curtain unit to reduce the angle between the blocking air curtain and the shielding air curtain;
the blocking control module obtains the working state change condition of the fan device, and if the working state of the fan device tends to reduce the strength of the suction force, the blocking control module adjusts the air outlet angle of the blocking air curtain unit so as to increase the angle between the blocking air curtain and the shielding air curtain.
2. The method for controlling the effective air curtain distance of the air curtain range hood according to claim 1, wherein an included angle between the air outlet direction of the blocking air curtain unit and the air outlet direction of the shielding air curtain unit ranges from 0 degree to 60 degrees;
the angle between the flow directions of the shielding air curtain and the blocking air curtain at least at the respective initial ends is in the range of 0-60 degrees.
3. The method for controlling the effective distance of the air curtain range hood according to the claim 1 or 2,
the working state of the fan device comprises the on/off state of the fan device, the gear of the fan device, the working power of the fan device, the working time of the fan device in any gear and the accumulated working time of the fan device.
4. The method for controlling the effective air curtain distance of an air curtain range hood according to claim 1,
and the blocking control module acquires the working state change condition of the fan device at real time/interval preset time.
5. The method for controlling the effective distance between the air curtains of the air curtain range hood according to claim 3, wherein the blocking control module obtains the change condition of the working state of the fan device, judges the relation between the variation of the working state of the fan device and the corresponding threshold value, and adjusts the air outlet angle of the blocking air curtain unit if the variation reaches the corresponding threshold value;
and if the variable quantity does not reach the corresponding threshold value, keeping the wind outlet angle of the current blocking air curtain unit.
6. The method for controlling the effective distance of the air curtain range hood according to claim 5, wherein the blocking control module acquires the time for the variation to reach the corresponding threshold value; if the keeping time reaches the corresponding time threshold, adjusting the air outlet angle of the blocking air curtain unit;
and if the keeping time does not reach the corresponding time threshold value, keeping the wind outlet angle of the current blocking air curtain unit.
7. The method for controlling the effective distance of the air curtain range hood according to claim 6, wherein if the maintained time does not reach the corresponding time threshold, the set time is waited, and the judgment of the relation between the working state variation and the corresponding threshold is executed again;
the set time comprises system automatic setting and/or user selection;
setting the set time according to the current working condition/working condition adjustment condition/accumulated running time of the fan device under the condition of automatic system setting;
if the current working condition of the fan device tends to strong wind power oil smoke absorption/long-time operation, prolonging the set time; if the current working condition of the fan device tends to the weak wind power oil smoke suction/short-time operation, the set time is shortened;
the long time is more than or equal to 2 min.
8. The method for controlling the effective distance between the air curtain of the air curtain range hood according to claim 6, wherein if the maintained time does not reach the corresponding time threshold, a prompt is sent to the user after waiting for the set time, and whether to perform the judgment of the relation between the working state variation and the corresponding threshold again or perform the adjustment of the air outlet angle of the blocking air curtain unit is inquired.
9. The method for controlling the effective distance between the air curtains of the air curtain range hood according to claim 1, wherein the air outlet of the shielding air curtain unit is adjustable;
the air curtain range hood comprises a shielding control module for controlling the air outlet angle of the shielding air curtain unit; the shielding control module is connected with a fan device which generates suction force for the range hood, and controls the air outlet angle of the shielding air curtain unit according to the working state of the fan device, and the blocking control module controls the air outlet angle of the shielding air curtain unit according to data generated by the blocking control module.
10. The method for controlling the effective distance between the wind curtain and the wind curtain of the wind curtain range hood according to claim 9, wherein under the control of the shielding control module, if the wind outlet angle of the shielding wind curtain unit makes the shielding wind curtain far away from/close to the wind suction opening of the range hood, the blocking control module adjusts the wind outlet angle of the blocking wind curtain unit to reduce/increase the included angle between the blocking wind curtain and the shielding wind curtain.
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| CN110836398A (en) | 2020-02-25 |
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