CN108105124B - Exhaust fan, and control method and device of exhaust fan - Google Patents
Exhaust fan, and control method and device of exhaust fan Download PDFInfo
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- CN108105124B CN108105124B CN201711319750.5A CN201711319750A CN108105124B CN 108105124 B CN108105124 B CN 108105124B CN 201711319750 A CN201711319750 A CN 201711319750A CN 108105124 B CN108105124 B CN 108105124B
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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
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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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
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
Abstract
The embodiment of the disclosure provides an exhaust fan, and a control method and a control device of the exhaust fan, which relate to the field of exhaust fan control, and the method comprises the following steps: acquiring first relative humidity detected by a temperature and humidity sensor at a first moment; acquiring second relative humidity detected by the temperature and humidity sensor at a second moment, wherein the second moment is after the first moment; determining a humidity amplitude value according to the first relative humidity and the second relative humidity; and when the humidity expansion amplitude value is not less than a preset threshold value, controlling the exhaust fan to be started. According to the method, the moment of opening the exhaust fan is determined according to the humidity rising amplitude, the exhaust fan is opened when the humidity rising amplitude is larger than a preset threshold value within preset time, environmental factors are not required to be considered, the problem that the exhaust fan is opened for a long time or the exhaust fan is opened due to the fact that the air is dry due to the fact that the air is wet for a long time when the moment of opening the exhaust fan is determined according to a fixed preset value is avoided, and the processing logic of opening the exhaust fan is simplified.
Description
Technical Field
The disclosure relates to the field of exhaust fan control, and in particular, to an exhaust fan control method and an exhaust fan control device.
Background
The exhaust fan is usually arranged in a humid environment such as a bathroom or a toilet, and when the humidity value in the environment reaches a certain height, a user can open the exhaust fan to extract humid air as soon as possible and re-inject relatively dry air so as to create a more comfortable environment.
In the related art, the timing of turning on the exhaust fan may be determined by setting a fixed value, such as: the fixed humidity value is set to be 50%, and when the humidity value in the air reaches 50%, the exhaust fan can be automatically opened and can exhaust the humid air.
Disclosure of Invention
The embodiment of the disclosure provides an exhaust fan, and a control method and device of the exhaust fan, which can solve the problem that the exhaust fan is opened or closed for a long time due to climate reasons. The technical scheme is as follows:
according to a first aspect of the present disclosure, there is provided an exhaust fan control method, the method including:
acquiring first relative humidity detected by a temperature and humidity sensor at a first moment;
acquiring a second relative humidity detected by the temperature and humidity sensor at a second moment, wherein the second moment is after the first moment;
determining a humidity amplitude value according to the first relative humidity and the second relative humidity;
and when the humidity rising amplitude value is not less than a preset threshold value, controlling the exhaust fan to be started.
In an optional embodiment, the determining a humidity rise amplitude value according to the first relative humidity and the second relative humidity comprises:
subtracting the humidity value of the first relative humidity from the humidity value of the second relative humidity to obtain a humidity difference value;
and determining the quotient of the humidity difference value and the humidity value of the first relative humidity as the humidity rising amplitude value.
In an optional embodiment, the method further comprises:
comparing the humidity value of the first relative humidity with the humidity value of the second relative humidity;
and when the humidity value of the first relative humidity is smaller than the humidity value of the second relative humidity, executing the step of determining the humidity rising amplitude value according to the first relative humidity and the second relative humidity.
In an alternative embodiment, the controlling the exhaust fan to be turned on includes:
and controlling the exhaust fan to work at the highest rotating speed, wherein the highest rotating speed is the maximum rotating speed which can be reached by the fan blades of the exhaust fan.
In an optional embodiment, the controlling the exhaust fan to be turned on further includes:
determining the working rotating speed of the exhaust fan according to the humidity rising amplitude, wherein the working rotating speed is the rotating speed of the fan blades of the exhaust fan in working;
and controlling the exhaust fan to work at the working rotating speed.
In an optional embodiment, after the controlling the exhaust fan to be turned on, the method further includes:
acquiring a third relative humidity detected by the temperature and humidity sensor at a third moment, wherein the third moment is after the second moment;
and when the third relative humidity is not greater than the first relative humidity, controlling the exhaust fan to be closed.
According to a second aspect of the present disclosure, there is provided an exhaust fan control apparatus, the apparatus comprising:
the acquisition module is configured to acquire a first relative humidity detected by the temperature and humidity sensor at a first moment;
the acquisition module is further configured to acquire a second relative humidity detected by the temperature and humidity sensor at a second time, wherein the second time is after the first time;
a determination module configured to determine a humidity rise magnitude from the first relative humidity and the second relative humidity;
the control module is configured to control the exhaust fan to be started when the humidity rising amplitude value is not smaller than a preset threshold value.
In an optional embodiment, the determining module includes:
a calculating unit configured to subtract the humidity value of the first relative humidity from the humidity value of the second relative humidity to obtain a humidity difference value;
the calculation unit is further configured to determine a quotient of the humidity difference value and the humidity value of the first relative humidity as the humidity rise value.
In an optional embodiment, the apparatus further comprises:
a comparison module configured to compare the humidity value of the first relative humidity and the humidity value of the second relative humidity;
the determining module is further configured to perform the step of determining a humidity rise magnitude from the first relative humidity and the second relative humidity when the humidity value of the first relative humidity is less than the humidity value of the second relative humidity.
In an optional embodiment, the control module is further configured to control the exhaust fan to operate at a maximum rotation speed, where the maximum rotation speed is a maximum rotation speed that the fan blades of the exhaust fan can reach.
In an optional embodiment, the determining module is further configured to determine an operating speed of the exhaust fan according to the humidity rise amplitude, where the operating speed is a rotational speed of the fan blades of the exhaust fan during operation;
the control module is further configured to control the exhaust fan to operate at the operating speed.
In an optional embodiment, the obtaining module is further configured to obtain a third relative humidity detected by the temperature and humidity sensor at a third time, where the third time is after the second time;
the control module is further configured to control the exhaust fan to be turned off when the third relative humidity is not greater than the first relative humidity.
According to a third aspect of the present disclosure, there is provided an exhaust fan, comprising a control chip and a temperature and humidity sensor;
the control chip executes any exhaust fan control method as in the first aspect and optional embodiments of the present disclosure.
The technical scheme provided by the embodiment of the disclosure has the beneficial effects that:
the moment of opening the exhaust fan is determined according to the humidity rising amplitude, the exhaust fan is opened when the humidity rising amplitude is larger than a preset threshold value within a preset time, environmental factors are not required to be considered, the problem that when the moment of opening the exhaust fan is determined according to a fixed preset value, the exhaust fan is opened for a long time due to the fact that air is wet for a long time or the exhaust fan is opened due to the fact that the air is dry for a long time is solved, and the processing logic of opening the exhaust fan is simplified.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is an internal structure view of an exhaust fan according to an exemplary embodiment of the present disclosure;
fig. 2 is an internal structure view of an exhaust fan according to another exemplary embodiment of the present disclosure;
fig. 3 is a flowchart of a control method of an exhaust fan according to an exemplary embodiment of the present disclosure;
fig. 4 is a flowchart of a control method of an exhaust fan according to another exemplary embodiment of the present disclosure;
fig. 5 is a block diagram of a control device for an exhaust fan according to an exemplary embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
First, a number of terms to which this disclosure relates will be introduced:
an exhaust fan: the exhaust fan is an air conditioning appliance which drives fan blades to rotate through the driving of a motor and pumps out air in the space where the exhaust fan is located.
Relative humidity: refers to the ratio of the absolute humidity of the air at a certain temperature to the maximum absolute humidity that can be achieved by the air at that temperature, such as: at an air temperature of 20 degrees celsius, the absolute humidity of the air is 40%, and the maximum absolute humidity that the air may reach at 20 degrees celsius is 80%, then the relative humidity of the air is the ratio of the absolute humidity of 40% to the maximum absolute humidity of 80%, i.e., 50%.
Humidity amplitude of rise: the humidity fluctuation value refers to the increase range of the relative humidity of the air in a preset time, such as: before 5 minutes, the relative humidity of the air is 50%, after 5 minutes, the relative humidity of the air is 60%, and the humidity rise amplitude of the air in 5 minutes is
Namely 20%.
In conjunction with the above terms related to the present disclosure, please refer to fig. 1 for further description of the exhaust fan provided in the embodiment of the present disclosure;
fig. 1 is a view illustrating an internal structure of an exhaust fan according to an exemplary embodiment of the present disclosure, and as shown in fig. 1, the exhaust fan 100 includes: the temperature and humidity sensor 110 and the control chip 120, optionally, the exhaust fan further includes a motor driver 130 and fan blades 140;
the temperature and humidity sensor 110 is configured to collect air within a preset range of the temperature and humidity sensor, and detect a relative humidity of the collected air, where optionally, a manner of detecting the relative humidity by the temperature and humidity sensor includes, but is not limited to, any one of the following manners:
firstly, the absolute humidity of the air and the current temperature of the air are detected, and the relative humidity of the air is calculated according to the absolute humidity and the temperature of the air, and schematically, the specific calculation formula is as follows:
wherein W is the relative humidity of the air, WAIs the absolute humidity of the air, WBIs the maximum absolute humidity or saturated absolute humidity of the air at the temperature of the air.
And secondly, the relative humidity of the air is directly detected by a measuring module in the temperature and humidity sensor.
The temperature and humidity sensor 110 is directly connected to the control chip 120, and the temperature and humidity sensor may output the detected relative humidity to the control chip 120, and optionally, the temperature and humidity sensor 110 may output the detected relative humidity to the control chip 120 in the form of a digital signal, or output the detected relative humidity to the control chip 120 in the form of an analog signal.
The control chip 120 is used for receiving data from the temperature and humidity sensor 110, such as: the relative humidity value controls the operation state of the motor driver 130, and optionally, a trigger signal may be generated in the control chip 120, and the trigger signal controls the operation state of the exhaust fan 100, that is, controls the operation state of the motor driver 130.
The motor drive 130 is used for driving the fan blade 140 to rotate, and optionally, the operating state of the motor drive 130 includes but is not limited to: an operating state and a closed state, wherein when the motor drive 130 is in the operating state, the operating state of the motor drive 130 can be further divided into a low-speed operating state, a medium-speed operating state and a high-speed operating state, or the speed of the operating state can be further increased linearly.
Referring to fig. 2, the fan blade 140 includes a blade 1401, a blade 1402, a blade 1403, and a fan blade rotating shaft 1404, and optionally, the motor driver 130 includes a rotating shaft, the rotating shaft is connected to the fan blade rotating shaft 1404 in the fan blade 140, when the motor driver 130 is in an operating state, the rotating shaft of the motor driver 130 starts to rotate, so as to drive the fan blade rotating shaft 1404 to rotate, the fan blade rotating shaft 1404 drives the blade 1401, the blade 1402, and the fan blade 1403 to rotate, and the higher the speed of the operating state of the motor driver 130 is, the higher the rotating speed of the fan blade 140 is, wherein the rotating direction of the fan blade 140 may be counterclockwise rotation or clockwise rotation, and referring to fig. 2, the rotating direction of the fan blade 140 is. It should be noted that, the above fan blade 140 is exemplified to include 3 blades, and in practical operation, the number of the blades may be more or less, and the embodiment of the disclosure does not limit this.
It should be noted that the exhaust fan 100 is usually disposed in a relatively closed space, such as: bathing rooms or toilets and the like in a humid environment.
In conjunction with the above description of the exhaust fan 100 and its terms, please refer to fig. 3 for a description of the exhaust fan control method provided in the embodiments of the present disclosure.
Fig. 3 is a flowchart of a control method of an exhaust fan according to an exemplary embodiment of the disclosure, which is described by taking the control method as an example applied to the exhaust fan 100 shown in fig. 1, and as shown in fig. 3, the control method of the exhaust fan includes:
Optionally, the exhaust fan obtains a first relative humidity detected by the temperature and humidity sensor at a first time through the control chip.
Optionally, the manner of detecting the first relative humidity includes, but is not limited to, at least one of the following methods:
firstly, detecting the absolute humidity of air and the current temperature of the air, and calculating the first relative humidity according to the absolute humidity and the temperature of the air;
and secondly, directly detecting the first relative humidity through a measuring module in the temperature and humidity sensor.
And 302, acquiring a second relative humidity detected by the temperature and humidity sensor at a second moment.
Optionally, the second time is after the first time.
Optionally, the time between the first time and the second time may be a preset time, the temperature and humidity sensor may output a relative humidity value to the control chip every preset time, and the control chip calculates a humidity amplitude according to the received two adjacent relative humidity values; the temperature and humidity sensor can also continuously output a relative humidity value obtained by detection to the control chip, and the control chip extracts two relative humidity values separated by preset time from the received relative humidity value to calculate a humidity amplitude value, such as: the control chip receives second relative humidity output by the temperature and humidity sensor at a second moment, extracts first relative humidity received at the first moment according to preset time at the second moment, and calculates the humidity amplitude value;
optionally, the time between the first time and the second time may also be non-preset, that is, after the first relative humidity is obtained at the first time, the temperature and humidity sensor continuously detects the relative humidity of the air, and calculates the humidity amplitude value by combining the first relative humidity.
Optionally, the method for the control chip to determine the humidity rising amplitude value according to the first relative humidity and the second relative humidity includes, but is not limited to, any one of the following methods:
firstly, subtracting the humidity value of the first relative humidity from the humidity value of the second relative humidity to obtain a humidity expansion amplitude value;
and secondly, subtracting the humidity value of the first relative humidity from the humidity value of the second relative humidity to obtain a humidity difference value, and determining the quotient of the humidity difference value and the humidity value of the first relative humidity as a humidity amplitude value.
And step 304, controlling the exhaust fan to be started when the humidity rising amplitude value is not less than a preset threshold value.
Alternatively, the preset threshold may be preset, and the preset threshold may be set by a user.
Optionally, the time between the first time and the second time may also be non-preset, that is, after the first relative humidity is obtained at the first time, the relative humidity of the air is continuously obtained, and when the humidity amplitude value calculated by the second relative humidity obtained at the second time and the first relative humidity is not less than the preset threshold value, the exhaust fan is controlled to be turned on.
Optionally, when the humidity amplitude is not less than the preset threshold, that is, the humidity amplitude is greater than the preset threshold or equal to the preset threshold, the control chip first controls the motor to drive the fan blades to rotate.
In summary, according to the exhaust fan control method provided in this embodiment, the time for turning on the exhaust fan is determined according to the humidity amplitude value, and the exhaust fan is turned on when the humidity amplitude value is greater than the preset threshold value within the preset time, without considering environmental factors, so that the problem that the exhaust fan is turned on for a long time due to long-term humid air or is turned on due to dry air due to weather when the time for turning on the exhaust fan is determined according to the fixed preset value is avoided, and the processing logic for turning on the exhaust fan is simplified.
Fig. 4 is a flowchart of a control method for an exhaust fan according to another exemplary embodiment of the disclosure, which is described by taking the control method as an example applied to the exhaust fan 100 shown in fig. 1, and as shown in fig. 4, the control method for the exhaust fan includes:
step 401, acquiring a first relative humidity detected by a temperature and humidity sensor at a first time.
Optionally, the exhaust fan obtains a first relative humidity detected by the temperature and humidity sensor at a first time through the control chip.
Optionally, the manner of detecting the first relative humidity includes, but is not limited to, at least one of the following methods:
firstly, detecting the absolute humidity of air and the current temperature of the air, and calculating the first relative humidity according to the absolute humidity and the temperature of the air;
and secondly, directly detecting the first relative humidity through a measuring module in the temperature and humidity sensor.
And 402, acquiring a second relative humidity detected by the temperature and humidity sensor at a second moment.
Optionally, the second time is after the first time.
In step 403, it is determined whether the humidity value of the first relative humidity is less than the humidity value of the second relative humidity.
In step 404, when the humidity value of the first relative humidity is smaller than the humidity value of the second relative humidity, the humidity value of the first relative humidity is subtracted from the humidity value of the second relative humidity to obtain a humidity difference value.
Optionally, when the humidity value of the first relative humidity is not less than the humidity value of the second relative humidity, emptying the first relative humidity value and the second relative humidity value, and repeating steps 401 to 403.
In step 405, the quotient of the humidity difference and the humidity value of the first relative humidity is determined as a humidity rise amplitude.
Illustratively, the humidity value of the first relative humidity acquired by the temperature and humidity sensor at the first moment is 50%, and the humidity value of the second relative humidity acquired at the second moment is 60%, and then the humidity difference is 60% -50%, that is, 10%, and the quotient of the humidity difference and the humidity value of the first relative humidity is determined as the humidity rising amplitude, that is, 20% of the quotient of 10% and 50%, and determined as the humidity rising amplitude.
And 406, controlling the exhaust fan to work at the highest rotating speed when the humidity amplitude value is not less than the preset threshold value.
Optionally, in order to extract the air with higher humidity as soon as possible, the exhaust fan is controlled to operate at the highest rotation speed that the fan blades of the exhaust fan can achieve, i.e. the maximum speed of the motor drive in the operating state.
And step 407, when the humidity amplitude is not less than the preset threshold, determining the working rotating speed of the exhaust fan according to the humidity amplitude.
Optionally, the operating speed is a rotational speed of a fan blade of the exhaust fan during operation.
Optionally, when the operating speed of the exhaust fan is differentiated according to the gear, the exhaust fan may store the corresponding relationship between the different humidity amplitude ranges and the operating speed, for example, please refer to the following table one:
watch 1
| Amplitude of humidity rise | Operating speed |
| 20％—30％ | 1 |
| 30％—40％ | 2 |
| 40％—50％ | 3 |
| 50％—60％ | 4 |
Wherein, the working rotating speed is increased from 1 to 4, and the rotating speed of the fan blades is also increased in sequence;
alternatively, when the operating speed of the exhaust fan can be increased linearly, the operating speed can be adjusted in proportion to the humidity rising amplitude, for example: the minimum value of the humidity expansion amplitude value of the exhaust fan is 20%, the maximum value of the humidity expansion amplitude value of the exhaust fan is 100%, the minimum value of the working rotating speed of the exhaust fan is 1, the maximum value of the working rotating speed of the exhaust fan is 5, and the linear relation between the humidity expansion amplitude value and the working rotating speed is determined according to the maximum value and the minimum value as follows: the working speed of the exhaust fan is 5 times of the humidity amplitude value.
And step 408, controlling the exhaust fan to work at the working rotating speed.
It should be noted that the above step 407, and steps 408 to 409 are two independent solutions provided by the embodiments of the present disclosure, that is, only step 407 may be executed, only step 408 and step 409 may be executed, or step 407 and step 408 to step 409 are executed in combination, such as: when the humidity amplitude is greater than the first preset threshold, step 407 is executed, and when the humidity amplitude is greater than the first preset threshold and is less than a second preset threshold, steps 408 to 409 are executed, where the second preset threshold is less than the first preset threshold.
And 409, acquiring a third relative humidity detected by the temperature and humidity sensor at a third moment.
Optionally, the third time is after the second time.
In step 410, it is determined whether the humidity value of the third relative humidity is greater than the humidity value of the first relative humidity.
In step 411, when the humidity value of the third relative humidity is not greater than the humidity value of the first relative humidity, the exhaust fan is controlled to be turned off.
Optionally, when the humidity value of the third relative humidity is smaller than the humidity value of the first relative humidity, or the humidity value of the third relative humidity is equal to the humidity value of the first relative humidity, the exhaust fan is controlled to be turned off, that is, the motor drive is turned off through the control chip.
In summary, the exhaust fan control method provided in this embodiment determines the time for turning on the exhaust fan according to the humidity fluctuation value, so that the problem that the exhaust fan cannot be turned on for a long time when the air is humid for a long time due to climate reasons or cannot be turned on for a short time when the air is dry due to climate reasons when the air is determined to be turned on according to a fixed preset value is avoided, and the accuracy for controlling the exhaust fan is improved;
in the exhaust fan control method provided by this embodiment, the humidity value of the first relative humidity is first compared with the humidity value of the second relative humidity, and the humidity rise amplitude is calculated when the humidity value of the first relative humidity is smaller than the humidity value of the second relative humidity, so that the calculation amount is reduced.
The exhaust fan control method provided by the embodiment improves the working efficiency of the exhaust fan by controlling the exhaust fan to work at the highest rotating speed.
The exhaust fan control method provided by this embodiment can distinguish and process the conditions of high amplitude value and low amplitude value by determining the operating rotating speed of the exhaust fan according to the humidity amplitude value, and can reduce the power consumption of the exhaust fan because the power consumption of the exhaust fan is large when the rotating speed is high.
According to the exhaust fan control method provided by the embodiment, when the third relative humidity is equal to or less than the first relative humidity, the exhaust fan is controlled to be closed in time, and the power consumption of the exhaust fan is prevented from being increased due to the fact that the exhaust fan works for a long time.
Fig. 5 is a block diagram of a control device of an exhaust fan according to an exemplary embodiment of the disclosure, and as shown in fig. 5, the control device of the exhaust fan includes: an acquisition module 51, a determination module 52 and a control module 53;
an acquiring module 51 configured to acquire a first relative humidity detected by the temperature and humidity sensor at a first time;
the acquiring module 51 is further configured to acquire a second relative humidity detected by the temperature and humidity sensor at a second time, which is after the first time;
a determination module 52 configured to determine a humidity rise magnitude from the first relative humidity and the second relative humidity;
and the control module 53 is configured to control the exhaust fan to be started when the humidity rising amplitude value is not smaller than a preset threshold value.
In an alternative embodiment, the determining module 52 includes:
a calculation unit configured to subtract the humidity value of the first relative humidity from the humidity value of the second relative humidity to obtain a humidity difference value;
a calculation unit further configured to determine a quotient of the humidity difference value and the humidity value of the first relative humidity as a humidity rise magnitude.
In an optional embodiment, the apparatus further comprises:
a comparison module configured to compare a humidity value of the first relative humidity with a humidity value of the second relative humidity;
the determining module 52 is further configured to perform the step of determining the humidity rise magnitude from the first relative humidity and the second relative humidity when the humidity value of the first relative humidity is smaller than the humidity value of the second relative humidity.
In an alternative embodiment, the control module 53 is further configured to control the exhaust fan to operate at a maximum rotational speed, which is the maximum rotational speed that the fan blades of the exhaust fan can achieve.
In an alternative embodiment, the determining module 52 is further configured to determine an operating speed of the exhaust fan according to the humidity fluctuation value, where the operating speed is a rotation speed of the fan blades of the exhaust fan during operation;
the control module 53 is further configured to control the exhaust fan to operate at an operating speed.
In an optional embodiment, the obtaining module 51 is further configured to obtain a third relative humidity detected by the temperature and humidity sensor at a third time, where the third time is after the second time;
the control module 53 is further configured to control the exhaust fan to be turned off when the third relative humidity is not greater than the first relative humidity.
In summary, the exhaust fan control device provided in this embodiment determines the time for turning on the exhaust fan according to the humidity fluctuation value, so that the problem that the exhaust fan cannot be turned on for a long time when the air is humid for a long time due to climate reasons or cannot be turned on due to short-time humidity when the air is dry due to climate reasons when the time for turning on the exhaust fan is determined according to a fixed preset value is avoided, and the accuracy for controlling the exhaust fan is improved;
the exhaust fan control device provided by the embodiment compares the humidity value of the first relative humidity with the humidity value of the second relative humidity, and calculates the humidity amplitude when the humidity value of the first relative humidity is smaller than the humidity value of the second relative humidity, so that the calculation amount is reduced.
The exhaust fan controlling means that this embodiment provided carries out work with the highest rotational speed through controlling the exhaust fan, has improved the work efficiency of this exhaust fan.
The exhaust fan control device provided by the embodiment can distinguish and process the conditions of higher amplitude value and lower amplitude value by determining the working rotating speed of the exhaust fan according to the humidity amplitude value, and the exhaust fan control device provided by the embodiment can reduce the power consumption condition of the exhaust fan due to the fact that the power consumption of the exhaust fan is larger when the rotating speed is higher.
The exhaust fan controlling means that this embodiment provided, when third relative humidity equals or is less than first relative humidity, timely control exhaust fan closes, avoids increasing the power consumption of exhaust fan because the long-time work of exhaust fan.
The embodiment of the disclosure also provides an exhaust fan, which comprises a control chip and a temperature and humidity sensor;
wherein, the control chip executes the exhaust fan control method as shown in any one of fig. 1 to 4.
The control chip can be any one of a control circuit board, a logic circuit board, a singlechip and an integrated circuit chip.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (11)
1. A method of controlling an exhaust fan, the method comprising:
acquiring first relative humidity detected by a temperature and humidity sensor at a first moment;
acquiring second relative humidity detected by the temperature and humidity sensor at a second moment, wherein the second moment is after the first moment, and the first relative humidity and the second relative humidity are calculated by combining the current air temperature and the absolute humidity;
determining a humidity amplitude value according to the first relative humidity and the second relative humidity;
when the humidity amplitude is not smaller than a preset threshold value, determining the working rotating speed of the exhaust fan according to the humidity amplitude, wherein the working rotating speed is the rotating speed of the fan blades of the exhaust fan in working;
and controlling the exhaust fan to work at the working rotating speed.
2. The method of claim 1, wherein determining a humidity rise magnitude from the first relative humidity and the second relative humidity comprises:
subtracting the humidity value of the first relative humidity from the humidity value of the second relative humidity to obtain a humidity difference value;
and determining the quotient of the humidity difference value and the humidity value of the first relative humidity as the humidity rising amplitude value.
3. The method of claim 1, further comprising:
comparing the humidity value of the first relative humidity with the humidity value of the second relative humidity;
and when the humidity value of the first relative humidity is smaller than the humidity value of the second relative humidity, executing the step of determining the humidity rising amplitude value according to the first relative humidity and the second relative humidity.
4. The method of any one of claims 1 to 3, wherein said controlling said exhaust fan to turn on comprises:
and controlling the exhaust fan to work at the highest rotating speed, wherein the highest rotating speed is the maximum rotating speed which can be reached by the fan blades of the exhaust fan.
5. The method according to any one of claims 1 to 3, wherein after controlling the exhaust fan to be turned on, the method further comprises:
acquiring a third relative humidity detected by the temperature and humidity sensor at a third moment, wherein the third moment is after the second moment;
and when the third relative humidity is not greater than the first relative humidity, controlling the exhaust fan to be closed.
6. An exhaust fan control apparatus, the apparatus comprising:
the acquisition module is configured to acquire a first relative humidity detected by the temperature and humidity sensor at a first moment;
the acquiring module is further configured to acquire a second relative humidity detected by the temperature and humidity sensor at a second time, which is later than the first time, wherein the first relative humidity and the second relative humidity are calculated by combining a current air temperature and an absolute humidity;
a determination module configured to determine a humidity rise magnitude from the first relative humidity and the second relative humidity;
the determination module is further configured to determine an operating rotation speed of the exhaust fan according to the humidity rising amplitude, wherein the operating rotation speed is a rotation speed of fan blades of the exhaust fan in operation;
the control module is further configured to control the exhaust fan to operate at the operating speed.
7. The apparatus of claim 6, wherein the determining module comprises:
a calculating unit configured to subtract the humidity value of the first relative humidity from the humidity value of the second relative humidity to obtain a humidity difference value;
the calculation unit is further configured to determine a quotient of the humidity difference value and the humidity value of the first relative humidity as the humidity rise value.
8. The apparatus of claim 6, further comprising:
a comparison module configured to compare the humidity value of the first relative humidity and the humidity value of the second relative humidity;
the determining module is further configured to perform the step of determining a humidity rise magnitude from the first relative humidity and the second relative humidity when the humidity value of the first relative humidity is less than the humidity value of the second relative humidity.
9. The apparatus of any one of claims 6 to 8, wherein the control module is further configured to control the exhaust fan to operate at a maximum rotational speed that is achievable by blades of the exhaust fan.
10. The apparatus according to any one of claims 6 to 8, wherein the acquiring module is further configured to acquire a third relative humidity detected by the temperature and humidity sensor at a third time, and the third time is after the second time;
the control module is further configured to control the exhaust fan to be turned off when the third relative humidity is not greater than the first relative humidity.
11. An exhaust fan is characterized by comprising a control chip and a temperature and humidity sensor;
the control chip executes the exhaust fan control method according to any one of claims 1 to 5.
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| CN109236707A (en) * | 2018-11-29 | 2019-01-18 | 南宁思飞电子科技有限公司 | One kind is based on humidity and its human body signal position analysis bathroom air exhaust fan system and its control method |
| CN109236706A (en) * | 2018-11-29 | 2019-01-18 | 南宁思飞电子科技有限公司 | One kind is based on Humidity Automatic Control bathroom air exhaust fan system and its control method |
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