CN118008866A - Control method for rotating speed of fan - Google Patents

Control method for rotating speed of fan Download PDF

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Publication number
CN118008866A
CN118008866A CN202410184831.2A CN202410184831A CN118008866A CN 118008866 A CN118008866 A CN 118008866A CN 202410184831 A CN202410184831 A CN 202410184831A CN 118008866 A CN118008866 A CN 118008866A
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China
Prior art keywords
fan
indoor fan
electric valve
angle
gear
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CN202410184831.2A
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Chinese (zh)
Inventor
陈瑞
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Ningbo Fotile Kitchen Ware Co Ltd
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Ningbo Fotile Kitchen Ware Co Ltd
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Priority to CN202410184831.2A priority Critical patent/CN118008866A/en
Publication of CN118008866A publication Critical patent/CN118008866A/en
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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
    • F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The application provides a control method of fan rotation speed, which is applied to a smoke exhaust system, and comprises the following steps: acquiring startup information of an indoor fan, driving the indoor fan and an auxiliary fan based on the startup information, and acquiring operation information of the indoor fan and the auxiliary fan; based on the operation information of the indoor fan and the auxiliary fan, adjusting at least one of the indoor fan and the auxiliary fan to the real-time rotating speed of the indoor fan not smaller than the limit rotating speed; acquiring output air quantity of the indoor fan based on the real-time rotating speed, comparing the output air quantity with a preset air quantity, and adjusting at least one of the indoor fan and the electric valve; and acquiring the electric valve angle of the indoor fan corresponding to the starting user in the multi-floor user under the stable state, comparing the electric valve angle corresponding to the starting user with the preset angle of the electric valve, and adjusting the rotating speed of the auxiliary fan. The application can adjust the air output of the multi-floor user range hood, and reduce the rear end resistance of the indoor fan, thereby improving the use experience of users.

Description

Control method for rotating speed of fan
Technical Field
The application relates to the field of kitchen electrical equipment, in particular to a control method of the rotating speed of a fan.
Background
At present, high-rise houses mostly adopt a centralized smoke discharging mode, and an indoor range hood is connected with a public flue through a smoke pipe and a check valve, so that the smoke in a kitchen is discharged into the public flue through the range hood through the smoke pipe. On one hand, the design and the installation of the exhaust passage component are unreasonable, so that the self smoke discharging resistance is larger; on the other hand, due to the difference of floor positions, the smoke exhaust resistance of the high floors is small, the air exhaust amount is large, the smoke exhaust resistance of the low floors is large, the air exhaust amount is small, the situation is particularly obvious under the condition of high starting-up rate, and the problem of unsmooth smoke exhaust can often occur in high-rise concentrated smoke exhaust, especially for low-floor users.
Disclosure of Invention
The application aims at least one of the existing technical problems, and provides a control method for the rotating speed of a fan.
The application provides a control method of fan rotation speed, which is applied to a smoke exhaust system, the smoke exhaust system comprises a plurality of indoor fans, auxiliary fans, an electric valve and an indoor and outdoor joint adjustment control device, the plurality of indoor fans are arranged in a plurality of floors, the auxiliary fans are arranged outside the plurality of floors, the electric valve is arranged on a pipeline between the indoor fans and the auxiliary fans, and the plurality of indoor fans and the auxiliary fans are in communication connection with the indoor and outdoor joint adjustment control device, and the smoke exhaust system is characterized by comprising:
S1, acquiring starting information of the indoor fan, driving the indoor fan and the auxiliary fan based on the starting information, and acquiring operation information of the indoor fan and the auxiliary fan;
s2, adjusting at least one of the indoor fan and the auxiliary fan to a real-time rotating speed of the indoor fan not smaller than a limit rotating speed based on the operation information of the indoor fan and the auxiliary fan;
s3, acquiring output air quantity of the indoor fan based on the real-time rotating speed, comparing the output air quantity with preset air quantity, and adjusting at least one of the indoor fan and the electric valve;
S4, acquiring the electric valve angle of the indoor fan corresponding to the starting user in the multi-floor user in a stable state, comparing the electric valve angle corresponding to the starting user with a preset angle of the electric valve, and adjusting the rotating speed of the auxiliary fan.
In a possible implementation manner, the step S3 further includes that the control gear of the multi-floor user is the same, the rotation speed of the indoor fan is consistent with the output air volume range, and the current gear of the indoor fan is unchanged under the condition that the output air volume of the indoor fan is between the preset air volumes.
In a possible implementation manner, the preset air volume includes a first limit output air volume and a second limit output air volume corresponding to each control gear, and the first limit output air volume is greater than the second limit output air volume.
In a possible implementation manner, the step S3 further includes controlling the running gear of the indoor fan to jump to a lower gear when the output air volume of the indoor fan is greater than the first limit output air volume corresponding to the current gear, recording the gear number after the indoor fan jumps, and returning to the step S2;
And under the condition that the output air quantity of the indoor fan is smaller than the second limit output air quantity corresponding to the current gear and the angle of the electric valve is equal to the preset electric valve angle, controlling the running gear of the indoor fan to jump to a higher gear, recording the gear number after the indoor fan jumps, and returning to S2.
In a possible implementation manner, when the output air volume of the indoor fan is smaller than the second limit output air volume corresponding to the current gear and the angle of the electric valve is smaller than the preset electric valve angle, the angle of the electric valve is increased, and the operation returns to the step S2.
In a possible implementation manner, under the condition that the real-time rotating speed of the indoor fan is smaller than the limit rotating speed, controlling the running gear of the indoor fan to jump to a gear higher than the limit rotating speed, and returning to the step S2;
And the real-time rotating speed of the indoor fan is smaller than the limit rotating speed, the angle of the electric valve is reduced, and the S2 is returned.
In a possible implementation manner, the step S4 further includes reducing the operation rotation speed of the auxiliary fan and returning to step S1 when the angle of the electric valve corresponding to the lowest starting floor in the starting user is smaller than the preset electric valve angle.
In a possible implementation manner, the step S4 further includes comparing the real-time rotation speed of the indoor fan corresponding to the highest starting floor in the starting user with the limit rotation speed of the corresponding current gear under the condition that the angle of the electric valve corresponding to the lowest starting floor in the starting user is equal to the preset electric valve angle, and increasing the rotation speed of the auxiliary fan under the condition that the real-time rotation speed is greater than the limit rotation speed of the corresponding current gear, and returning to the step S1;
And under the condition that the angle of the electric valve corresponding to the lowest starting floor in the starting user is equal to the preset electric valve angle and the real-time rotating speed of the indoor fan corresponding to the highest starting floor in the starting user is larger than the limit rotating speed of the corresponding current gear, the auxiliary fan keeps the current state to continue to operate.
In a possible implementation manner, when the angle of the electric valve corresponding to the lowest starting floor in the starting user is equal to the preset electric valve angle and the real-time rotating speed of the indoor fan corresponding to the highest starting floor in the starting user is greater than the limit rotating speed of the corresponding current gear, the difference between the real-time rotating speed of the indoor fan and the limit rotating speed of the corresponding current gear is not greater than 50 rotations.
In a possible implementation manner, the step S1 further includes that a user operates to open the range hood, select a control gear on a panel of the range hood, and the indoor and outdoor joint debugging control device obtains the starting information and drives the indoor fan and the electric valve to operate.
In a possible embodiment, the electric valve angle is 0 to 90 degrees, and the preset angle of the electric valve is 90 degrees.
The application provides a control method of fan rotation speed, which is applied to a smoke exhaust system, and comprises the following steps: acquiring startup information of an indoor fan, driving the indoor fan and an auxiliary fan based on the startup information, and acquiring operation information of the indoor fan and the auxiliary fan; based on the operation information of the indoor fan and the auxiliary fan, adjusting at least one of the indoor fan and the auxiliary fan to the real-time rotating speed of the indoor fan not smaller than the limit rotating speed; acquiring output air quantity of the indoor fan based on the real-time rotating speed, comparing the output air quantity with a preset air quantity, and adjusting at least one of the indoor fan and the electric valve; and acquiring the electric valve angle of the indoor fan corresponding to the starting user in the multi-floor user under the stable state, comparing the electric valve angle corresponding to the starting user with the preset angle of the electric valve, and adjusting the rotating speed of the auxiliary fan. The application can adjust the air output of the multi-floor user range hood, and reduce the rear end resistance of the indoor fan, thereby improving the use experience of users.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a logic diagram of a method for controlling the rotational speed of a fan according to an embodiment of the present application;
Fig. 2 is a schematic structural diagram of a smoke exhaust system according to an embodiment of the present application;
fig. 3 is a schematic diagram of a relationship between air volume and pressure of a range hood according to an embodiment of the present application;
fig. 4 is a schematic diagram of a relationship between air quantity and rotation speed of a range hood according to an embodiment of the present application;
fig. 5 is a schematic diagram of a relationship between air quantity and current gear of a range hood according to an embodiment of the present invention;
Fig. 6 is a schematic diagram of a relationship between power and air volume of a driving device according to an embodiment of the present application.
The following supplementary explanation is given to the accompanying drawings:
10. An auxiliary fan; 11. an auxiliary pipe; 12. a flue base; 13. a common flue; 14. a fire protection valve; 15. an electric valve; 20. an indoor fan.
Detailed Description
In order to enable those skilled in the art to better understand the present application, the following description will make clear and complete descriptions of the technical solutions according to the embodiments of the present application with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the application. In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may include one or more of the feature, either explicitly or implicitly. Moreover, the terms "first," "second," and the like, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.
The following describes a smoke exhaust control system provided by the embodiment of the application with reference to the accompanying drawings, and the smoke exhaust control system is particularly suitable for multi-floor users.
As shown in fig. 1, a fan rotation speed control method is applied to a smoke exhaust system, the smoke exhaust system includes a plurality of indoor fans 20, an auxiliary fan 10, an electric valve 15 and an indoor and outdoor joint adjustment control device, the plurality of indoor fans 20 are used for being arranged in a multi-floor room, the auxiliary fan 10 is used for being arranged outside the multi-floor room, the electric valve 15 is used for being arranged on a pipeline between the indoor fans 20 and the auxiliary fan 10, and the plurality of indoor fans 20 and the auxiliary fan 10 are in communication connection with the indoor and outdoor joint adjustment control device, and the method is characterized by comprising the following steps:
S1, acquiring startup information of an indoor fan 20, driving the indoor fan 20 and an auxiliary fan 10 based on the startup information, and acquiring operation information of the indoor fan 20 and the auxiliary fan 10;
Specifically, S1 still includes that the user operates and opens the lampblack absorber, selects the control gear on the lampblack absorber panel, and indoor outer joint debugging controlling means obtains start information and drives indoor fan 20 and motorised valve 15 operation, through indoor outer joint debugging controlling means, realizes the automated control after the user opens the lampblack absorber, need not the manual intervention of user, has improved convenience and the intellectuality of using, can also control the operation of indoor fan 20 and motorised valve 15 intelligently to realize reasonable distribution and the saving of energy consumption, reduce the energy consumption.
Specifically, the user presses the gear switch on the panel of the range hood, the indoor fan 20 further comprises a current gear, the rotating speeds of the indoor fan 20 are different in different current gears, and the output power of the driving motor is also different, so that different air volumes are achieved. The gear of user only sets up two, and electric current gear sets up a plurality ofly, and indoor outside allies oneself with regulation and control device can be according to gear information and electric current gear that the user selected, realizes more accurate control.
Specifically, the starting information comprises starting floor and starting gear information, the indoor control device can acquire the starting information, and the indoor control device and the outdoor control device can be in interconnection communication through a wired or wireless technology.
It can be understood that the scheme of the smoke exhaust system provided by the application can realize extremely low noise, and the distributed target air quantity can meet the cooking requirement of a user under the auxiliary smoke exhaust effect of the auxiliary fan 10, and on the control gear setting of the indoor fan 20, only two choices of a strong gear and a weak gear are required to be set, so that the complexity of user operation can be further reduced, and as the weak gear is selected by the user, the air quantity of the weak gear has no high requirement on the air quantity, the constant air quantity can be adopted, and can also be set to be constant, namely the target air quantity issued by the outdoor unit does not change the target air quantity executed by the weak gear, and the method is always executed according to 9m 3/min in the embodiment. The target air quantity of the strong gear is executed according to the numerical value issued by the outdoor unit, so that the noise and the effect under different working conditions are considered, and the optimal cooking experience is achieved.
In an embodiment, the indoor and outdoor joint debugging control device further comprises a mobile terminal, the mobile terminal can realize remote control and data recording of the indoor and outdoor joint debugging control device through a mobile phone App or other remote control modes, and a user can monitor and adjust the indoor fan 20 and the auxiliary fan 10 in real time through the mobile terminal, so that intelligent control is realized, and experience degree of the user and convenience and flexibility of control are improved.
S2, based on the operation information of the indoor fan 20 and the auxiliary fan 10, adjusting the gear and the rotating speed of the indoor fan 20 or adjusting the rotating speed of the auxiliary fan 10 and the angle of the electric valve 15 until the real-time rotating speed of the indoor fan 20 is not less than the limit rotating speed;
S3, acquiring output air quantity of the indoor fan 20 based on real-time rotation speed, comparing the output air quantity with preset air quantity, and adjusting at least one of the indoor fan 20 and the electric valve 15;
Specifically, the control gear of the users with multiple floors is the same, the rotating speed of the indoor fan 20 is consistent with the output air volume range, the current gear of the indoor fan 20 is unchanged under the condition that the output air volume of the indoor fan 20 is between preset air volumes, and the air volumes of the range hoods of the users are consistent, so that the reliability of the constant air volume control of the smoke exhaust system is improved.
Specifically, the control gear is the strong gear and the weak gear, wherein the current gear is multiple, the higher the current gear is, the higher the rotating speed of the indoor fan 20 is, and under the condition of different starting-up rates, the current gear of the indoor fan 20 can also be different.
As shown in table 1, the air volume of the indoor fan 20 is shown in the following table under different control gear and on-rate conditions:
In this embodiment, two gears, namely a weak gear and a strong gear, are provided on an operation gear on a user operation panel of the range hood, the weak gear corresponds to the first gear, the strong gear corresponds to the second gear, the corresponding output Δq is not greater than 1m 3/min in the weak gear state, specifically, the output air volume range q±Δq of the range hood is 8.5-9.5m 3/min, the ideal value of the output air volume Q is 9m 3/min, in the strong gear state, as shown in table 1, the output air volume range q±Δq is 10.5-14.5m 3/min, and as the opening probability increases, the ideal value of the output air volume Q is 14m 3/min、13m3/min、12m3/min and 11m 3/min in sequence.
Specifically, the output air quantity q is real-time output air quantity of the indoor fan 20, the preset air quantity comprises a first limit output air quantity and a second limit output air quantity corresponding to each gear, and air quantity values between the first limit output air quantity and the second limit output air quantity, the first limit output air quantity is larger than the second limit output air quantity, and the indoor fan 20 does not need to be additionally regulated among the preset air quantities, so that the requirements of users on multiple floors are met, current gears or angles of the electric valves 15 do not need to be frequently regulated, and the reliability of a smoke discharging system is improved.
Specifically, the target air volume of each operation gear is Q, where the first limit output air volume is q+Δq 1, and the second limit output air volume is q—Δq 2, where Δq 1 and Δq 2 may be changed, and Δq 1 and Δq 2 may be the same or different.
In the embodiment, the difference between the first limit output air quantity Q+DeltaQ and the second limit output air quantity Q-DeltaQ of which the preset air quantity is Q+/-DeltaQ is 1m 3/min.
Specifically, the angle of the electric valve 15 is 0 to 90 degrees, the preset angle of the electric valve 15 is 90 degrees, the effective ventilation area of the fluid is the largest under the condition that the angle of the electric valve 15 is 90 degrees, that is, the angle between the valve plate of the electric valve 15 and the radial direction of the pipeline where the electric valve 15 is located is 90 degrees, and the effective air outlet of the fluid is smaller under the condition that the angle of the electric valve 15 is 0 degree, that is, the angle between the valve plate of the electric valve 15 and the radial direction of the pipeline where the electric valve 15 is located is 0 degree, that is, the fluid cannot pass through the electric valve 15, and the smaller the angle of the electric valve 15 is.
Specifically, the preset air volume is related to gear information and a starting rate, and the higher the starting rate is, the lower the preset air volume is.
As shown in table 2, table 2 is a table of the relationship between the current gear and the lowest rotational speed of the indoor fan 20 corresponding to the gear:
S3 may also include the step of,
S301, controlling the running gear of the indoor fan 20 to jump to one gear below when the output air volume of the indoor fan 20 is larger than the first limit output air volume corresponding to the gear, recording the gear number after the indoor fan 20 jumps, and returning to S2;
S302, when the output air volume of the indoor fan 20 is smaller than the second limit output air volume corresponding to the gear and the angle of the electric valve 15 is equal to the preset electric valve 15 angle, controlling the running gear of the indoor fan 20 to jump to the higher gear, recording the gear number after the indoor fan 20 jumps, and returning to S2.
Specifically, when the output air quantity Q of the indoor fan 20 is greater than the first limit output air quantity q+Δq corresponding to the gear, the output air quantity of the indoor fan 20 should be reduced at this time, the running gear of the indoor fan 20 is the current gear, the current gear of the indoor fan 20 is controlled to jump to one gear lower, i.e. n=n-1, and the real-time running gear is recorded.
Specifically, when the output air quantity Q of the indoor fan 20 is smaller than the second limit output air quantity Q- Δq corresponding to the gear, the output air quantity of the indoor fan 20 should be increased at this time, and when the angle of the electric valve 15 is equal to the preset angle of the electric valve 15, the current gear of the indoor fan 20 is controlled to jump to a higher gear, that is, n=n+1, that is, the angle of the electric valve 15 is 90 °, fluid can pass through the electric valve 15 to the greatest extent, and the rotating speed of the indoor fan 20 is increased by increasing the current gear.
S303, when the output air volume of the indoor fan 20 is smaller than the second limit output air volume corresponding to the gear and the angle of the electric valve 15 is smaller than the preset electric valve 15 angle, increasing the angle of the electric valve 15 and returning to S2.
Specifically, when the output air quantity Q of the indoor fan 20 is smaller than the second limit output air quantity Q- Δq corresponding to the gear, the output air quantity of the indoor fan 20 should be raised at this time, and when the angle of the electric valve 15 is smaller than the preset electric valve 15 angle, that is, the electric valve 15 angle is smaller than 90 °, the angle of the electric valve 15 is raised, the effective ventilation area of the fluid passing through the electric valve 15 is increased, and the output air quantity of the indoor fan 20 is raised correspondingly.
Specifically, as shown in fig. 5, the relation diagram of the air volume and the rotation speed includes two sections, the solid line section represents the relation between the air volume and the rotation speed of the range hood in the positive pressure state of the outlet of the range hood in different current gears, and the curve relation satisfies the quadratic function q=a+b+n+c×n 2. Wherein A, B and C are constants, and n is the real-time rotating speed of the indoor fan. For a single range hood, namely, only the indoor fan 20 is in a positive pressure state, the rear end of the single range hood is in a positive pressure state, only a curve section of a solid line part is needed, and for a scene with auxiliary smoke exhaust of the auxiliary fan 10, the rear end of the range hood is in a negative pressure state with high probability, and the relation between the rotating speed and the air quantity of the range hood is required to be extended to the negative pressure state, namely, a virtual line section in the upper diagram.
In one embodiment, to ensure the accuracy of the curve fitting, the virtual line end and the solid line end may be fitted using different relationships, or may be the same functional relationship, depending on the range hood itself and the requirements for the accuracy of the fitting.
In this embodiment, the real line segment is connected to the dashed line segment. Wherein, the excessively high negative pressure value of the range hood can increase the operation noise of the range hood.
Further, under the condition that the real-time rotating speed of the indoor fan 20 is smaller than the limit rotating speed, controlling the running gear of the indoor fan 20 to jump to the higher gear, and returning to the step S2;
When the real-time rotational speed of the indoor fan 20 is less than the limit rotational speed, the angle of the electric valve 15 is reduced, and the flow returns to S2.
Specifically, the first limit output air volume is q+Δq, the second limit output air volume is Q- Δq, and the indoor fan further includes a third limit output air volume Q Nmax, where the third limit output air volume Q Nmax is a minimum rotation speed n Nmin of the indoor fan 20 corresponding to the current gear n, and n Nmin corresponds to Q Nmax on a rotation speed-air volume curve.
S4, acquiring the angle of the electric valve 15 of the indoor fan 20 corresponding to the starting user in the multi-floor user in a stable state, comparing the angle of the electric valve 15 corresponding to the starting user with the preset angle of the electric valve 15, and adjusting the rotating speed of the auxiliary fan 10.
S4, further comprises the step of reducing the operation rotating speed of the auxiliary fan 10 and returning to S1 under the condition that the angle of the electric valve 15 corresponding to the lowest starting floor in the starting user is smaller than the preset electric valve 15 angle.
Specifically, under the condition that the angle of the electric valve 15 corresponding to the lowest starting floor among the starting users is smaller than the preset electric valve 15 angle, the effective ventilation area of the fluid passing through the electric valve 15 can be adjusted to be larger at the output air volume range Q±DeltaQ of the range hood at the lowest starting floor among the starting users, namely under the condition that the output air volume is ensured, the effective ventilation area of the fluid passing through the electric valve 15 can be increased, the operation rotating speed of the auxiliary fan 10 is reduced, and otherwise, the output air volume is larger than the first limit output air volume Q+ DeltaQ.
Specifically, when the angle of the electric valve 15 corresponding to the lowest starting floor among the starting users is equal to the preset electric valve 15 angle and the real-time rotation speed of the indoor fan 20 corresponding to the highest starting floor among the starting users is greater than the limit rotation speed of the corresponding gear, the auxiliary fan 10 maintains the current state to continue to operate, at this time, the auxiliary effect of the auxiliary fan 10 is proper, and the rear end resistance of the indoor fan 20 is not less than-100 pa, so that the condition of too low rotation speed of the indoor fan 20 is not caused.
It will be appreciated that for low floors, the exhaust volume of the range hood may be increased and the operating noise of the range hood may be increased by the auxiliary exhaust of the auxiliary fan 10. In the prior art, the smoke exhaust system has a large risk, when the outdoor unit operates at a high rotating speed, noise generated by the outdoor unit is easy to be transmitted into a room through the pipeline assembly, and when the range hood is not opened, several layers of users close to the outdoor unit are easy to generate noise, because the running rotating speed of the outdoor unit is higher and the noise is larger to meet the corresponding air volume requirement.
Specifically, in the case where the angle of the electric valve 15 corresponding to the lowest starting floor among the starting users is equal to the preset electric valve 15 angle and the real-time rotation speed of the indoor fan 20 corresponding to the highest starting floor among the starting users is greater than the limit rotation speed of the corresponding gear, the difference between the real-time rotation speed of the indoor fan 20 and the limit rotation speed of the corresponding gear is not greater than 50 rotations, that is, the real-time rotation speed of the indoor fan 20 is close to the limit rotation speed of the corresponding gear, and the limit rotation speed of the corresponding gear is the limit rotation speed corresponding to the current gear, as shown in table 2. The smoke exhaust system operates in a relatively stable state, so that the normal operation of equipment is maintained, and the system instability caused by the fluctuation of the rotating speed is reduced.
In one embodiment, the real-time rotation speed of the indoor fan 20 is n, the limit rotation speed of the corresponding gear is n Nmin,n-nNmin is less than or equal to 50rpm, at this time, it is indicated that the real-time rotation speed of the indoor fan 20 accords with the set operation condition, and if the real-time rotation speed is too large or too small, the angle of the current gear and the electric valve 15 is adjusted.
Further, S4 further includes, when the angle of the electric valve 15 corresponding to the lowest starting floor in the starting user is smaller than the preset electric valve 15 angle, reducing the operation rotation speed of the auxiliary fan 10, and returning to S1;
Specifically, the lowest floor of the starting users and the lowest floor of the building may be the same or different, in practical application, the lowest floor of the starting users is related to the use state of the users, the user of the lowest floor of the building should be included in the exhaust test process of the exhaust system to keep the starting state, the lowest floor of the starting users coincides with the lowest floor of the building, and the importance of keeping the starting state of the user of the lowest floor of the building is to ensure that the exhaust system can effectively exhaust oil smoke, so that the exhaust system can effectively operate under various conditions.
Comparing the real-time rotating speed of the indoor fan 20 corresponding to the highest starting floor in the starting user with the limit rotating speed of the corresponding gear under the condition that the angle of the electric valve 15 corresponding to the lowest starting floor in the starting user is equal to the preset angle of the electric valve 15, and increasing the rotating speed of the auxiliary fan 10 under the condition that the real-time rotating speed is larger than the limit rotating speed of the corresponding gear, and returning to S1;
Specifically, under the high load condition, the indoor fan 20 corresponding to the highest starting floor can smoothly discharge smoke, and the high-floor user can smoothly discharge smoke, so that the energy utilization efficiency is improved and the energy consumption is reduced by increasing the rotating speed of the auxiliary fan 10 and matching the actual demand.
It can be understood that the operation state of the auxiliary fan 10 is determined by the operation state of each indoor starting floor, when the angle of the electric valve 15 of the indoor fan 20 of the lowest starting floor is not 90 °, and the rear end of the range hood of the highest starting floor is in a state that the negative pressure is about-100 Pa, that is, the rotation speed of the indoor fan 20 of the highest starting floor is close to the minimum rotation speed n Nmin, the auxiliary effect generated by the auxiliary fan 10 is proper, otherwise, the power of the auxiliary fan 10 is insufficient, and the rotation speed needs to be increased. Through such closed loop control, it is realized that every indoor fan 20 and auxiliary fan 10 all operate at reasonable operating point, avoid auxiliary fan 10 power too enough, and some floors need the angle of adjusting motorised valve 15 to produce resistance energy consumption, perhaps because auxiliary fan 10 power is not enough, indoor fan 20 operates at higher gear, and the noise increases to some extent.
Specifically, the indoor fan 20 operates in a high current gear, the smoke discharging resistance is small, the indoor fan 20 operates in a low current gear, noise can be reduced, accordingly, the exhaust amount of each floor is consistent, for high-floor users, the indoor fan 20 can operate in a small current gear due to the fact that the smoke discharging resistance is small, kitchen noise can be low, and smoke discharging of other floors can not be hindered. The regulation and control based on the constant air quantity can avoid the adverse effect on high-rise buildings caused by the air quantity balance realized by the angle regulation of the electric valve 15.
The foregoing is only illustrative of the present application and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present application.

Claims (11)

1. The control method of fan rotational speed is applied to the system of discharging fume, the system of discharging fume includes a plurality of indoor fans, auxiliary fan, motorised valve and indoor outer joint modulation controlling means, a plurality of indoor fans are used for setting up in the indoor of many floors, auxiliary fan is used for setting up the outside of many floors, motorised valve is used for setting up on the pipeline between indoor fan with auxiliary fan, a plurality of indoor fan with auxiliary fan with indoor outer joint modulation controlling means communication connection, its characterized in that includes:
S1, acquiring starting information of the indoor fan, driving the indoor fan and the auxiliary fan based on the starting information, and acquiring operation information of the indoor fan and the auxiliary fan;
s2, adjusting at least one of the indoor fan and the auxiliary fan to a real-time rotating speed of the indoor fan not smaller than a limit rotating speed based on the operation information of the indoor fan and the auxiliary fan;
s3, acquiring output air quantity of the indoor fan based on the real-time rotating speed, comparing the output air quantity with preset air quantity, and adjusting at least one of the indoor fan and the electric valve;
S4, acquiring the electric valve angle of the indoor fan corresponding to the starting user in the multi-floor user in a stable state, comparing the electric valve angle corresponding to the starting user with a preset angle of the electric valve, and adjusting the rotating speed of the auxiliary fan.
2. The method according to claim 1, wherein S3 further comprises that the control gear of the multi-floor user is the same, the rotation speed of the indoor fan is consistent with the output air volume range, and the current gear of the indoor fan is unchanged when the output air volume of the indoor fan is between the preset air volumes.
3. The method for controlling a rotational speed of a fan according to claim 1, wherein the preset air volume includes a first limit output air volume and a second limit output air volume corresponding to each control gear, and the first limit output air volume is greater than the second limit output air volume.
4. The method for controlling the rotational speed of a blower according to claim 2, wherein,
The step S3 is that under the condition that the output air quantity of the indoor fan is larger than the first limit output air quantity corresponding to the current gear, the running gear of the indoor fan is controlled to jump to one gear lower, the gear number after the indoor fan jumps is recorded, and the step S2 is returned;
And under the condition that the output air quantity of the indoor fan is smaller than the second limit output air quantity corresponding to the current gear and the angle of the electric valve is equal to the preset electric valve angle, controlling the running gear of the indoor fan to jump to a higher gear, recording the gear number after the indoor fan jumps, and returning to S2.
5. The method according to claim 4, wherein when the output air volume of the indoor fan is smaller than the second limit output air volume corresponding to the current gear and the angle of the electric valve is smaller than the preset electric valve angle, the angle of the electric valve is increased, and the flow returns to S2.
6. The method for controlling the rotational speed of a fan according to claim 3, wherein when the real-time rotational speed of the indoor fan is less than the limit rotational speed, the operation gear of the indoor fan is controlled to jump to a higher gear, and the operation gear returns to S2;
And the real-time rotating speed of the indoor fan is smaller than the limit rotating speed, the angle of the electric valve is reduced, and the S2 is returned.
7. The method for controlling the rotational speed of a fan according to any one of claims 1 to 3, wherein S4 further includes reducing the operation rotational speed of the auxiliary fan and returning to S1 when the angle of the electric valve corresponding to the lowest starting floor among the starting users is smaller than the preset electric valve angle.
8. A method for controlling the rotational speed of a blower according to any one of claims 1 to 3,
The step S4 is to compare the real-time rotating speed of the indoor fan corresponding to the highest starting floor in the starting user with the limit rotating speed of the corresponding current gear under the condition that the angle of the electric valve corresponding to the lowest starting floor in the starting user is equal to the preset electric valve angle, and increase the rotating speed of the auxiliary fan under the condition that the real-time rotating speed is larger than the limit rotating speed of the corresponding current gear, and return to the step S1;
And under the condition that the angle of the electric valve corresponding to the lowest starting floor in the starting user is equal to the preset electric valve angle and the real-time rotating speed of the indoor fan corresponding to the highest starting floor in the starting user is larger than the limit rotating speed of the corresponding current gear, the auxiliary fan keeps the current state to continue to operate.
9. The method for controlling the rotational speed of a fan according to claim 8, wherein when the angle of the electric valve corresponding to the lowest starting floor among the starting users is equal to the preset electric valve angle and the real-time rotational speed of the indoor fan corresponding to the highest starting floor among the starting users is greater than the limit rotational speed of the corresponding current gear, the difference between the real-time rotational speed of the indoor fan and the limit rotational speed of the corresponding current gear is not greater than 50 rotations.
10. A method for controlling the rotational speed of a blower according to any one of claims 1 to 3,
And S1 further comprises the step of operating and opening the range hood by a user, selecting a control gear on a panel of the range hood, and acquiring the starting information by the indoor and outdoor joint debugging control device and driving the indoor fan and the electric valve to operate.
11. A control method of a fan rotation speed according to any one of claims 1 to 3, wherein the electric valve angle is 0 degrees to 90 degrees, and the preset angle of the electric valve is 90 degrees.
CN202410184831.2A 2024-02-19 2024-02-19 Control method for rotating speed of fan Pending CN118008866A (en)

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Application Number Priority Date Filing Date Title
CN202410184831.2A CN118008866A (en) 2024-02-19 2024-02-19 Control method for rotating speed of fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410184831.2A CN118008866A (en) 2024-02-19 2024-02-19 Control method for rotating speed of fan

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CN118008866A true CN118008866A (en) 2024-05-10

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