CN113108328A - Method and device for adjusting range hood - Google Patents
Method and device for adjusting range hood Download PDFInfo
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- CN113108328A CN113108328A CN202010156630.3A CN202010156630A CN113108328A CN 113108328 A CN113108328 A CN 113108328A CN 202010156630 A CN202010156630 A CN 202010156630A CN 113108328 A CN113108328 A CN 113108328A
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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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses a method and a device for adjusting a range hood, wherein the range hood comprises a fan, and the method for adjusting the range hood comprises the following steps: collecting the operating parameters of the fan, and calculating to obtain an actual value of the air volume of the fan, an actual value of the air pressure of the fan and the pressure of a common flue; determining a target air volume interval where the actual value of the air volume of the fan is located and a corresponding air pressure set value; if the actual value of the wind pressure of the fan exceeds the set range of the set value of the wind pressure, calculating according to the pressure of the common flue and the set value of the wind pressure to obtain the required value of the wind volume of the fan, calculating to obtain the target adjusting parameter of the fan, and adjusting the fan. According to the invention, the stage constant air pressure logic is fed back and controlled by the fan operation parameters, so that the stage constant air pressure is realized, the fan characteristic curve is optimized through program control according to the actual use requirements of users, the air quantity and the noise of high-rise users are reduced on the basis of ensuring that the use requirements of users on each floor are met, and the smoking effect of the low-rise users is ensured.
Description
Technical Field
The invention relates to a smoke treatment technology, in particular to a method and a device for adjusting a range hood.
Background
The range hood is arranged on the upper part or the side part of the cooking range and is integrated with a fan. The working principle of the range hood is that a fan rotates at a high speed to form a negative pressure area in a certain space range above a stove, indoor oil fume is sucked into the range hood, the oil fume is purified and separated into oil drops and smoke, the oil drops are collected into an oil cup, and the smoke is discharged along a flue.
The range hood is provided with a plurality of gears, each gear corresponds to a set air volume, and the air volume of the range hood on the market at present under the nominal gear is an ideal value tested and set under laboratory conditions. In the actual use process, because the resistance of the smoke pipe and the pressure of the common flue exist, the actual effective air volume of the same product and the same gear under different use environments is different. If the pressure of the common flue is higher, the actual effective air volume is lower, the phenomena of oil smoke escape and no smoking can occur, and even the oil smoke of other users flows backwards. The use requirements of users cannot be met.
Disclosure of Invention
The invention provides an adjusting method and device of a range hood, and aims to improve the smoking effect of the range hood.
The invention provides a method for adjusting a range hood, wherein the range hood comprises a fan, and the method comprises the following steps:
collecting the operating parameters of the fan, and calculating to obtain an actual value of the air volume of the fan, an actual value of the air pressure of the fan and the pressure of a common flue;
determining a target air volume interval where the actual value of the air volume of the fan is located and a corresponding air pressure set value;
and if the actual wind pressure value of the fan exceeds the set range of the wind pressure set value, calculating to obtain a fan wind volume demand value according to the public flue pressure and the wind pressure set value, calculating to obtain a target adjusting parameter of the fan, and adjusting the fan.
Further, the operation parameters of the fan comprise the actual frequency and the operation power of the fan, and the target adjustment parameters of the fan comprise the target frequency of the fan.
Further, gather the operating parameter of fan, calculate and obtain fan amount of wind actual value, fan wind pressure actual value and public flue pressure, include:
collecting the actual frequency f0 and the running power N0 of the fan;
calculating the actual rotating speed n0 of the fan according to the formula (1), calculating the actual air volume value Q0 of the fan according to the formula (2), and calculating the actual air pressure value P of the fan according to the formula (3)T0Calculating the common flue pressure P0 according to equation (4);
n＝μ(f) (1)；
Q＝G(n，N) (2)；
PT＝H(Q，n) (3)；
wherein xi is the resistance coefficient of the branch pipe of the cigarette machine, and A is the sectional area of the branch pipe of the cigarette machine.
Further, according to the common flue pressure P0 and the wind pressure set value PTsetCalculating to obtain a fan air volume demand value, calculating to obtain target adjusting parameters of the fan, and adjusting the fan, wherein the method comprises the following steps:
calculating the fan air quantity demand value Q1 according to the common flue pressure and the wind pressure set value and a formula (4),
calculating the required rotating speed n1 of the fan according to the formula (3), wherein n1 is H-1 Q1(PTset) And then calculating and adjusting the target frequency f1 of the fan according to the formula (1), wherein f1 is mu-1(n1)。
Further, still include: and if the actual wind pressure value of the fan is in the set range of the wind pressure set value or the fan is adjusted, restarting the process after a specific time length.
The invention also provides an adjusting device of a cigarette making machine, the cigarette making machine comprises a fan, and the adjusting device comprises:
the parameter acquisition module is used for acquiring the operating parameters of the fan and calculating to obtain an actual air volume value of the fan, an actual air pressure value of the fan and the pressure of a common flue;
the processing parameter module is used for determining a target air volume interval where the actual value of the air volume of the fan is located and a corresponding air pressure set value; and if the actual wind pressure value of the fan exceeds the set range of the wind pressure set value, calculating to obtain a fan wind volume demand value according to the public flue pressure and the wind pressure set value, calculating to obtain a target adjusting parameter of the fan, and adjusting the fan.
Further, the operation parameters of the fan comprise the actual frequency and the operation power of the fan, and the target adjustment parameters of the fan comprise the target frequency of the fan.
Further, the acquisition parameter module comprises:
the collection unit is used for collecting the actual frequency f0 and the running power N0 of the fan;
a first arithmetic unit for calculating the actual speed n0 of the fan according to the formula (1), the actual wind quantity Q0 of the fan according to the formula (2), and the actual wind pressure P of the fan according to the formula (3)T0Calculating the common flue pressure P0 according to equation (4);
n＝μ(f) (1)；
Q＝G(n，N) (2)；
PT＝H(Q，n) (3)；
wherein xi is the resistance coefficient of the branch pipe of the cigarette machine, and A is the sectional area of the branch pipe of the cigarette machine.
Further, the processing parameter module comprises:
a second arithmetic unit for calculating the common flue pressure P0 and the wind pressure set value PTsetCalculating the fan air quantity demand value Q1 according to a formula (4),
calculating the required rotating speed n1 of the fan according to the formula (3), wherein n1 is H-1 Q1(PTset) And then calculating the target frequency f1 of the fan according to the formula (1), wherein f1 is mu-1(n1)；
And the adjusting unit is used for adjusting the frequency of the fan according to the target frequency f1 of the fan.
Further, still include: and the circulation module is used for restarting the process after a specific time length if the actual wind pressure value of the fan is within the set range of the wind pressure set value or the fan is adjusted.
According to the invention, after the wind pressure is adjusted according to the wind pressure control logic according to the fan operation parameters, under the common flue pressure at the current moment after the adjustment, the wind quantity output by the fan is in the target wind quantity interval and the wind pressure is in the set range of the wind pressure set value corresponding to the target wind quantity interval, and the constant wind pressure, namely the staged constant wind pressure, is realized in the wind quantity interval. For a larger air volume interval, the adjusted effective air pressure is within the set range of the air pressure set value and is higher than the effective air pressure before optimization, so that the smoke exhaust effect can be improved; for a smaller air volume interval, the adjusted effective air pressure is within the set range of the air pressure set value and is lower than the effective air pressure before optimization, so that the noise is reduced, and the smoke exhaust effect can be ensured. Obviously, in the air volume interval, no matter how the external pressure changes, the effective air pressure is always within the setting range of the corresponding air pressure setting value, and is not influenced by the change of the external pressure, so that the staged constant air pressure is realized.
Drawings
To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description, although being some specific embodiments of the present invention, can be extended and extended to other structures and drawings by those skilled in the art according to the basic concepts of the device structure, the driving method and the manufacturing method disclosed and suggested by the various embodiments of the present invention, without making sure that these should be within the scope of the claims of the present invention.
FIG. 1 is a schematic illustration of a method of adjusting a cigarette making machine according to an embodiment of the present invention;
figure 2 is a schematic diagram of a method of adjusting a range hood provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of a wind pressure-air volume curve of a range hood before optimization;
FIG. 4 is a schematic diagram of an optimized wind pressure-air volume curve of a range hood;
figure 5 is a schematic view of an adjustment device for a range hood provided by an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described through embodiments with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the basic idea disclosed and suggested by the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1, a schematic diagram of an adjusting method of a cigarette making machine according to an embodiment of the present invention is shown. The cigarette machine described in this embodiment includes a blower and further includes an adjusting device for executing the adjusting method, and the adjusting device is implemented in a software and/or hardware manner and configured to be used in the cigarette machine.
The adjusting method provided by the embodiment comprises the following steps:
and S1, collecting the operation parameters of the fan, and calculating to obtain the actual value of the air volume of the fan, the actual value of the air pressure of the fan and the pressure of the common flue.
In this step, the fan operation parameters are the operation parameters of the fan at the current moment, and the selectable fan operation parameters at least include the actual frequency and the operation power of the fan. The frequency of the fan is related to the rotating speed of the fan, and the rotating speed and the power of the fan influence the air quantity of the fan, so that the actual value of the air quantity of the fan can be calculated according to the rotating speed and the power of the fan. The rotating speed and the air volume of the fan influence the total pressure of the fan, so that the actual value of the air pressure of the fan can be determined according to the rotating speed and the actual value of the air volume of the fan. The total pressure and the air quantity of the fan are related to the pressure of the common flue, so that the pressure of the common flue can be calculated according to the actual value of the air pressure of the fan and the actual value of the air quantity of the fan.
It is understood that the operating parameters of the wind turbine also include other parameters, such as current parameters, etc., and only the parameters related to the wind pressure control program are described herein.
And S2, determining a target air volume interval where the actual value of the fan air volume is and a corresponding air pressure set value.
The main factor influencing the smoking effect of the range hood is the air volume of the range hood, the air volume and the air pressure of the range hood are theoretically corresponding to each other and meet the self P-Q curve, but in the actual use scene of the range hood, the environment of a flue where the range hood is located also influences the air volume of the range hood. The difference of the flue conditions of different user's homes and the difference of floor that uses lead to appearing its effective amount of wind not high condition under even high wind pressure cigarette machine, have caused the waste of resource, if the problem that improves the amount of wind and bring is exactly that the noise is too big. Based on this, match the different flue environment of user in this embodiment, realize the amount of wind through stage constant wind pressure and under the prerequisite that satisfies the use, guarantee as far as in certain amount of wind within range that the wind pressure is invariable, noise abatement.
Specifically, in this step, a plurality of adjacent air volume intervals are set in the adjusting device of the range hood, and the division of the plurality of air volume intervals is performed in combination with the actual use scene of the user. Different loads that use the floor are different, and through detecting the discovery, the wind pressure of low floor is big, and the wind pressure of high floor is little, guarantees the wind pressure invariable in certain amount of wind within range, then can be at this amount of wind within range noise abatement, avoids the wind pressure to change along with the change of the amount of wind, leads to the noise too big. After a plurality of air volume intervals are divided, a wind pressure set value corresponding to each air volume interval is determined, and then constant wind pressure is kept in the air volume interval.
For example, 10 is used as the air volume node, two air volume intervals are stored in the adjusting device, 0-10 is used as the first air volume interval, 10-15 is used as the second air volume interval, the air pressure set value corresponding to the first air volume interval is 550Pa, and the air pressure set value corresponding to the second air volume interval is 350 Pa. It can be understood that the values of the air volume interval and the air pressure set value are examples, manufacturers can adjust the air volume interval and the air pressure set value according to different products and market areas used by the products, and when the same product is applied to different market areas, the parameters of the same product may be different. Not limited thereto.
And S3, if the actual wind pressure value of the fan exceeds the set range of the wind pressure set value, calculating to obtain the wind volume demand value of the fan according to the pressure of the common flue and the wind pressure set value, and then calculating to obtain the target adjusting parameter of the fan and adjusting the fan.
In the step, a wind pressure set value is set in the adjusting device of the range hood, and the wind pressure set value is selected by combining with the actual use scene of a user. The loads of different floors are different, and detection shows that the wind pressure of a low floor is large, the wind pressure of a high floor is small, a node is set according to the height of the floor to be a wind pressure set value, and the range formed by the up-and-down floating error of the wind pressure set value is the set range of the wind pressure set value.
For example, if the wind pressure error is ± 50Pa, and the wind pressure set value corresponding to the first wind volume interval [0, 10] is 550Pa, the set range of the wind pressure set value is [500, 600 ]; if the wind pressure setting value corresponding to the second wind volume interval (10, 15) is 350Pa, the setting range of the wind pressure setting value is [300, 400 ]. based on the above example, the specific implementation procedure of this step is:
step1, after acquiring an actual value of air volume of a fan, an adjusting device detects an air volume interval to which the actual value of the air volume of the fan belongs; if the wind volume belongs to the first wind volume interval [0, 10], executing the step2, and if the wind volume belongs to the second wind volume interval (10, 15), executing the step 3;
step2, determining the set value of the wind pressure as 550 and the set range as [500, 600], and detecting whether the actual value of the wind pressure of the fan exceeds the set range of the set value of the wind pressure; if yes, executing the step4, otherwise, returning to the step 1;
step3, determining that the wind pressure set value is 350 and the set range thereof is [300, 400], and detecting whether the actual wind pressure value of the fan exceeds the set range of the wind pressure set value or not; if yes, executing the step4, otherwise, returning to the step 1;
and 4, determining the corresponding wind pressure set value as a target wind pressure set value.
And if the actual value of the air volume of the fan is 9.8 and the actual value of the air pressure of the fan is 545Pa, returning to execute the step S1 after the steps. And if the actual value of the air volume of the fan is 9.1 and the actual value of the air pressure of the fan is 489Pa, determining that the set value of the target air pressure is 550Pa after the steps. And if the actual value of the air volume of the fan is 12.4 and the actual value of the air pressure of the fan is 350Pa, returning to execute the step S1 after the steps are carried out. And if the actual value of the air volume of the fan is 12.9 and the actual value of the air pressure of the fan is 410Pa, determining that the set value of the target air pressure is 350Pa after the steps.
When the actual value of the wind pressure of the fan exceeds the set range of the set value of the wind pressure, the required value of the wind volume of the fan required for reaching the set value of the wind pressure under the pressure of the common flue at the current moment can be calculated according to the value, and then the target adjusting parameter of the fan is determined through reverse operation so as to adjust the operation parameter of the fan. The target adjustment parameter of the selectable fan includes a target frequency of the fan. The adjusted wind pressure of the fan can be in the set range of the wind pressure set value corresponding to the target wind volume interval, the wind volume of the fan is the required wind volume required by reaching the wind pressure set value under the pressure of the public flue at the current moment, and the wind pressure is not influenced by external loads such as the pressure of the public flue.
In this embodiment, after the wind pressure is adjusted according to the wind pressure control logic, under the common flue pressure at the current time after the adjustment, the wind volume output by the fan is within the target wind volume interval and the wind pressure is within the setting range of the wind pressure setting value corresponding to the target wind volume interval, so that the constant wind pressure, i.e., the periodic constant wind pressure, is realized in the wind volume interval. For a larger air volume interval, the adjusted effective air pressure is within the set range of the air pressure set value and is higher than the effective air pressure before optimization, so that the smoke exhaust effect can be improved; for a smaller air volume interval, the adjusted effective air pressure is within the set range of the air pressure set value and is lower than the effective air pressure before optimization, so that the noise is reduced, and the smoke exhaust effect can be ensured. Obviously, in the air volume interval, no matter how the external pressure changes, the effective air pressure is always within the setting range of the corresponding air pressure setting value, and is not influenced by the change of the external pressure, so that the staged constant air pressure is realized.
For example, on the basis of the above technical solution, as shown in fig. 2, the operation of step S1 may be selected, the operation parameters of the fan are collected, and the actual value of the air volume of the fan, the actual value of the air pressure of the fan, and the common flue pressure are obtained through calculation, which specifically include:
s11, collecting the actual frequency f0 and the running power N0 of the fan. And acquiring the actual frequency f0 and the actual power N0 of the fan at the current time t 0.
S12, calculating the actual rotating speed n0 of the fan according to the formula (1), calculating the actual air volume value Q0 of the fan according to the formula (2), and calculating the actual air pressure value P of the fan according to the formula (3)T0Calculating a common flue pressure P0 according to equation (4);
n＝μ(f) (1)；
Q＝G(n，N) (2)；
PT＝H(Q，n) (3)；
wherein xi is the resistance coefficient of the branch pipe of the cigarette machine, and A is the sectional area of the branch pipe of the cigarette machine.
In a mathematical model of the smoke machine, the rotating speed and the frequency of a fan are in a linear relation and have a functional relation shown in a formula (1); under the condition that the rotating speed of the fan is determined, the functional relation between the air quantity of the fan and the power of the fan meets the formula (2); according to the characteristic curve of the wind pressure P-the wind quantity Q, the full pressure (namely the wind pressure) of the fan can be determined by the fitting of the rotating speed and the wind quantity of the fan, and the functional relation of the full pressure and the wind quantity meets the formula (3); the difference between the full pressure at the outlet of the cigarette machine (i.e. the wind pressure of the fan) and the pressure of the common flue is consumed on the branch pipes of the cigarette machine, and the equation is shown as the formula (4).
Based on the functional relationship, if the actual frequency f0 of the fan is known, the rotating speed calculated according to the formula (1) is the actual rotating speed n0 of the fan. Knowing the actual rotating speed N0 of the fan and the actual power N0 of the fan, the air volume calculated according to the formula (2) is the actual value Q0 of the air volume of the fan. Knowing the actual rotating speed n0 and the actual value Q0 of the wind volume of the fan, the wind pressure calculated according to the formula (3) is the actual value P of the wind pressure of the fanT0. The actual wind pressure value P of the fan is knownT0And the actual value Q0 of the air volume of the fan, the common flue pressure P0 of the range hood can be calculated according to the formula (4).
As shown in fig. 2, the operation of step S3 may be selected, the required value of the air volume of the fan is calculated according to the common flue pressure and the set value of the air pressure, and then the target adjustment parameter of the fan is calculated and the fan is adjusted, which specifically includes:
s31, according to the common flue pressure P0 and the wind pressure set value PTsetCalculating a fan air quantity demand value Q1 according to the formula (4),
as described above, the common flue pressure P0 for the environment in which the range hood is currently located is known, and the fan set point P is knownTsetThen, the fan air volume demand value Q1 can be calculated according to the formula (4), and the calculated fan air volume demand value Q1 is characterized in that the set value P of the air pressure is reached under the external pressure P0TsetThe required air quantity of the fan.
Specifically, the known fan air volume demand value Q1 is characterized in that the set value P of the air pressure is reached under the outside pressure P0TsetThe required air quantity of the fan satisfies the formula (4) PTset-P0＝αQ12. Then calculate toTo Q1.
S32, calculating the required rotating speed n1 of the fan according to the formula (3), wherein n1 is H-1 Q1(PTset) Then, the target frequency f1 of the fan is calculated and adjusted according to the formula (1), wherein f1 is mu-1(n1)。
It is known that the set value P of the wind pressure is reached under the outside pressure P0TsetThe required fan air quantity requirement value is Q1, then the wind pressure set value P can be calculated according to the formula (3)TsetThe required rotating speed n1, n1 of the fan required by the fan air volume required value Q1 is H-1 Q1(PTset) Then, the target frequency f1 of the fan is calculated according to the formula (1), wherein f1 is mu-1(n1), wherein the target adjusting parameter of the fan is f1, the frequency of the fan is adjusted according to f1 to reach the frequency f1, and after the fan operates according to the parameter after the frequency is adjusted, the range hood can reach the set wind pressure value PTsetAnd constant wind pressure is realized.
As shown in fig. 2, the optional adjusting method further includes: and if the actual wind pressure value of the fan is in the set range of the wind pressure set value or the fan is adjusted, restarting the process after a specific time length. If the actual value of the wind pressure of the fan is within the setting range of the wind pressure setting value, the step is ended, and the process is restarted from the step S1 at the next time t0+ Δ t. Alternatively, after the fan is adjusted at step S3, it is restarted from step S1 after a certain time period Δ t.
It will be appreciated that this particular length of time Δ t may be very small (e.g., less than 0.5 seconds), enabling real-time adjustment of the entire range hood. If the specific time length delta t can be relatively large (for example, less than 1 minute), the smoke machine is adjusted regularly after certain smoke aggregation is generated, and the power consumption can be reduced.
The following description will be made by comparing the existing cigarette making machine with the cigarette making machine described in the embodiments of the present invention.
The lampblack absorber on the existing market is various in types, the air pressure is generally large, but the flue condition and the floor of an actual user house are different, and for users with partial low floors, because the flue impedance is large, the air quantity in actual use hardly reaches the theoretical maximum air quantity of the lampblack absorber, so that resource waste is caused. However, if the environment of the flue is not changed, the air pressure of the range hood is adjusted to increase the air volume, which may cause excessive noise. To this problem, this embodiment makes its stage constant wind pressure through adjustment lampblack absorber wind pressure under the unchangeable circumstances of flue environment, realizes higher amount of wind as far as possible, satisfies user's demand, and the noise abatement as far as is satisfied under the prerequisite of using to the amount of wind.
The air volume and the air pressure of the range hood are corresponding theoretically and meet the self P-Q curve, but due to the difference of the conditions of the respective flues of the user and the difference of the used floors, the range hood with high air pressure has the condition that the air volume obtained in the actual use is not high, so that the resource waste is caused to a great extent, the cost performance is low, and the phenomenon that the smoking effect is not good but the high air pressure is caused to part of users is caused. In the embodiment of the invention, the characteristic curve of the wind pressure-wind volume of the range hood is optimized by adjusting the parameters of the range hood, so that the constant wind pressure output of the user at home is ensured, the smoking problem of the range hood is solved, and the user experience is improved.
Referring to figure 3, a graph of the performance of a prior art cigarette making machine is shown. The descending curve represents a P-Q curve of the range hood, the ascending curve represents a flue impedance curve, an abscissa corresponding to a point where the two lines intersect represents the actually obtained air volume of the range hood, and the situation that the range hood is large in nominal air volume but not smooth in smoke discharge may occur, namely the actually obtained air volume is smaller than a value which can be theoretically provided by the range hood.
Referring to fig. 4, a staged constant wind pressure is realized for the optimized performance curve of the constant wind pressure cigarette maker. When the amount of wind at the cigarette machine was in and sets for the interval, the effective wind pressure of cigarette machine reality was invariable, and this effective wind pressure of reality can not change along with external load's change in the amount of wind is set for the interval, and the effective wind pressure that satisfies the user demand is invariable, realizes the permanent wind pressure of stage nature, has improved the smoking effect. Specifically, users 1, 2, and 3 represent different flue impedance curves of 3 users, point a is the intersection point of the impedance curve of user 1 and the constant wind pressure line segment, point B is the intersection point of the impedance curve of user 2 and the constant wind pressure line segment, point C is the intersection point of the impedance curve of user 3 and the constant wind pressure line segment, and the slopes of the impedance curves of user 1, user 2, and user 3 decrease in sequence. The slope of the impedance curve of the user 1 is the largest, the effective air output by the cigarette machine is the smallest, and the effective air output is in a first air setting interval [0, 11], and in the first air setting interval, the wind pressure of the cigarette machine of the user 1 can be maintained in a setting range of 550Pa, namely [500, 600] by adopting the wind pressure control program. The slope of the impedance curve of the user 2 is larger than that of the user 3, the effective air volume output by the user 2 is sequentially reduced but is in a second air volume setting interval (11, 15), and in the second air volume setting interval, the air pressure of the smoke machines of the users 2 and 3 can be maintained in a setting range of 350Pa, namely 300, 400, by adopting the air pressure control program, so that the change of the external load in the air volume setting interval does not influence the stable output of the air pressure, and the stage constant air pressure is realized.
Comparing before and after optimization, the wind pressure of the users 1 to 3 before optimization is reduced in sequence, and the wind pressure of the users in the same wind volume setting interval in the users 1 to 3 after optimization is constant. The actual wind pressure after the user 1/2/3 optimizes is all greater than the wind pressure before optimizing.
According to the embodiment of the invention, the stage constant wind pressure is realized through the constant wind pressure control logic, and it can be understood that the parameter control logic can also be applied to other products of the same type. Those skilled in the art will appreciate that the amount of residential kitchen exhaust air is selected with the goal of meeting kitchen exhaust air requirements. The exhaust air volume is too small, the oil smoke can escape, and the kitchen has peculiar smell. However, it is not preferable that the larger the size is, the larger the amount of exhaust air is, and the more the power consumption and noise of the fan in the kitchen will be increased. According to the embodiment of the invention, the fan characteristic curve is optimized through program control according to the actual use requirements of users, on the basis of ensuring that the use requirements of users on each floor are met, the air quantity of high-rise users is reduced, the noise is reduced, and meanwhile, the smoking effect of low-rise users is ensured.
The embodiment of the invention also provides a regulating device of a cigarette making machine, the cigarette making machine comprises a fan, and as shown in figure 5, the regulating device comprises: the parameter acquisition module 10 is used for acquiring the operation parameters of the fan and calculating to obtain an actual air volume value of the fan, an actual air pressure value of the fan and the pressure of the common flue; the processing parameter module 20 is configured to determine a target air volume interval where the actual value of the air volume of the fan is located and a corresponding air pressure set value; if the actual value of the wind pressure of the fan exceeds the set range of the set value of the wind pressure, calculating according to the pressure of the common flue and the set value of the wind pressure to obtain the required value of the wind volume of the fan, calculating to obtain the target adjusting parameter of the fan, and adjusting the fan.
The operation parameters of the selectable fan comprise the actual frequency and the operation power of the fan, and the target adjusting parameters of the fan comprise the target frequency of the fan.
The optional acquisition parameter module 10 includes:
the collection unit is used for collecting the actual frequency f0 and the running power N0 of the fan;
a first arithmetic unit for calculating the actual speed n0 of the fan according to the formula (1), the actual value Q0 of the wind volume of the fan according to the formula (2), and the actual value P of the wind pressure of the fan according to the formula (3)T0Calculating a common flue pressure P0 according to equation (4);
n＝μ(f) (1)；
Q＝G(n，N) (2)；
PT＝H(Q，n) (3)；
wherein xi is the resistance coefficient of the branch pipe of the cigarette machine, and A is the sectional area of the branch pipe of the cigarette machine.
The optional processing parameter module 20 includes:
a second arithmetic unit for calculating a fan air volume demand value Q1 according to a formula (4) based on the common flue pressure and the air pressure set value,
calculating the required rotating speed n1 of the fan according to the formula (3), wherein n1 is H-1 Q1(PTset) Then, the target frequency f1 of the fan is calculated according to the formula (1), wherein f1 is mu-1(n1)；
And the adjusting unit is used for adjusting the frequency of the fan according to the target frequency f1 of the fan.
Optionally, the adjusting device further comprises: and the circulation module 30 is configured to restart the process after a certain time period if the actual wind pressure value of the fan is within the set range of the wind pressure set value or the fan is adjusted.
Accordingly, the control logic of the frequency conversion scheme of the wind pressure control device is as follows:
step 1: acquiring a frequency f0 at a time t0, and obtaining the fan speed n0 at the time as mu (f0) according to the formula (1);
step 2: collecting the motor power at the moment, and obtaining an actual fan air volume value Q0 at the moment as G (N0, N0) according to the formula (2); the actual value P of the wind pressure of the fan can be obtained by the formula (3)T0＝P0+αQ02；
Step 3: the wind quantity Q0 and the wind pressure P at the moment are measuredT0With the set value Q of air quantityset1And the wind pressure set value PTset1And (3) comparison:
if the air quantity Q0 and the air quantity set value Qset1Is within its corresponding set range, and the wind pressure PT0With the wind pressure set value PTset1The difference value is in the corresponding set range, the Step is ended, and the Step is restarted from Step1 at the next time t0+ delta t;
if only the air quantity Q0 and the air quantity set value Q are usedset1Within the corresponding setting range, the target wind pressure setting value P is madeTset＝PTset1And performing Step 5; otherwise, performing Step 4;
step 4: air quantity Q0 and air quantity set value Qset2Is within its corresponding set range,
if the wind pressure PT0With the wind pressure set value PTset2If the difference value is within the corresponding set range, ending the Step, and restarting from Step1 at the next time t0+ Δ t;
if the wind pressure PT0With the wind pressure set value PTset2The difference value exceeds the corresponding set range, and the target wind pressure set value P is enabled to beTset＝PTset2And performing Step 5;
step 5: the common flue pressure P0 at this time is calculated from equation (4) to be PT0-αQ02FromThis can obtain the target wind pressure set value P under the outside pressure P0TsetRequired air volume of
Step 6: determining the required rotating speed of the fan under the external pressure as n1 ═ H-1 Q1(PTset) Further, from (1), the target value of the fan frequency adjustment is obtained as f1 ═ μ-1(n1)；
Step 7: at the next time t0+ Δ t, it restarts at Step 1.
In this embodiment, the stage constant wind pressure is realized through the constant wind pressure control logic, and it can be understood that the parameter control logic can also be applied to other products of the same type. This embodiment is according to user's in-service use demand, through program control optimization fan characteristic curve, on guaranteeing to satisfy each floor user and use the basis, reduces the high-rise user amount of wind, and the noise abatement guarantees low-rise user smoking effect simultaneously.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An adjustment method for a range hood, the range hood including a fan, the adjustment method comprising:
collecting the operating parameters of the fan, and calculating to obtain an actual value of the air volume of the fan, an actual value of the air pressure of the fan and the pressure of a common flue;
determining a target air volume interval where the actual value of the air volume of the fan is located and a corresponding air pressure set value;
and if the actual wind pressure value of the fan exceeds the set range of the wind pressure set value, calculating to obtain a fan wind volume demand value according to the public flue pressure and the wind pressure set value, calculating to obtain a target adjusting parameter of the fan, and adjusting the fan.
2. The method of adjusting of claim 1, wherein the operational parameters of the wind turbine include an actual frequency and an operational power of the wind turbine, and the target adjustment parameters of the wind turbine include a target frequency of the wind turbine.
3. The adjusting method of claim 2, wherein the collecting the operating parameters of the fan and calculating the actual value of the fan air volume, the actual value of the fan air pressure and the common flue pressure comprises:
collecting the actual frequency f0 and the running power N0 of the fan;
calculating the actual rotating speed n0 of the fan according to the formula (1), calculating the actual air volume value Q0 of the fan according to the formula (2), and calculating the actual air pressure value P of the fan according to the formula (3)T0Calculating the common flue pressure P0 according to equation (4);
n＝μ(f) (1)；
Q＝G(n，N) (2)；
PT＝H(Q，n) (3)；
wherein xi is the resistance coefficient of the branch pipe of the cigarette machine, and A is the sectional area of the branch pipe of the cigarette machine.
4. The adjusting method according to claim 3, wherein calculating a fan air volume demand value according to the common flue pressure and the wind pressure set value, and then calculating a target adjusting parameter of the fan and adjusting the fan comprises:
according to the common flue pressure P0 and the wind pressure set value PTsetCalculating the fan air quantity demand value Q1 according to a formula (4),
calculating the required rotating speed n1 of the fan according to the formula (3), wherein n1 is H-1 Q1(PTset) And then calculating and adjusting the target frequency f1 of the fan according to the formula (1), wherein f1 is mu-1(n1)。
5. The adjustment method according to claim 1, further comprising: and if the actual wind pressure value of the fan is in the set range of the wind pressure set value or the fan is adjusted, restarting the process after a specific time length.
6. An adjustment device for a range hood, said range hood comprising a fan, the adjustment device comprising:
the parameter acquisition module is used for acquiring the operating parameters of the fan and calculating to obtain an actual air volume value of the fan, an actual air pressure value of the fan and the pressure of a common flue;
the processing parameter module is used for determining a target air volume interval where the actual value of the air volume of the fan is located and a corresponding air pressure set value; and if the actual wind pressure value of the fan exceeds the set range of the wind pressure set value, calculating to obtain a fan wind volume demand value according to the public flue pressure and the wind pressure set value, calculating to obtain a target adjusting parameter of the fan, and adjusting the fan.
7. The tuning rig of claim 6, wherein the operating parameters of the wind turbine include an actual frequency and an operating power of the wind turbine, and the target tuning parameters of the wind turbine include a target frequency of the wind turbine.
8. The adjustment device of claim 7, wherein the acquisition parameter module comprises:
the collection unit is used for collecting the actual frequency f0 and the running power N0 of the fan;
a first arithmetic unit for calculating the actual speed n0 of the fan according to the formula (1), the actual wind quantity Q0 of the fan according to the formula (2), and the actual wind pressure P of the fan according to the formula (3)T0Calculating the common flue pressure P0 according to equation (4);
n＝μ(f) (1)；
Q＝G(n，N) (2)；
PT＝H(Q，n) (3)；
wherein xi is the resistance coefficient of the branch pipe of the cigarette machine, and A is the sectional area of the branch pipe of the cigarette machine.
9. The adjustment device of claim 8, wherein the processing parameter module comprises:
a second arithmetic unit for calculating the common flue pressure P0 and the wind pressure set value PTsetCalculating the fan air quantity demand value Q1 according to a formula (4),
calculating the required rotating speed n1 of the fan according to the formula (3), wherein n1 is H-1 Q1(PTset) And then calculating the target frequency f1 of the fan according to the formula (1), wherein f1 is mu-1(n1)；
And the adjusting unit is used for adjusting the frequency of the fan according to the target frequency f1 of the fan.
10. The adjustment device of claim 6, further comprising: and the circulation module is used for restarting the process after a specific time length if the actual wind pressure value of the fan is within the set range of the wind pressure set value or the fan is adjusted.
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| WO2024088013A1 (en) * | 2022-10-27 | 2024-05-02 | 广东澄一科技有限公司 | Range hood |
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