CN110567125B - Fan self-adaptive control method and device during frosting, air conditioner and storage medium - Google Patents
Fan self-adaptive control method and device during frosting, air conditioner and storage medium Download PDFInfo
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- CN110567125B CN110567125B CN201910897939.5A CN201910897939A CN110567125B CN 110567125 B CN110567125 B CN 110567125B CN 201910897939 A CN201910897939 A CN 201910897939A CN 110567125 B CN110567125 B CN 110567125B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
- F24F2110/22—Humidity of the outside air
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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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- Air Conditioning Control Device (AREA)
Abstract
The invention provides a fan self-adaptive control method and device during frosting, an air conditioner and a storage medium, and relates to the technical field of air conditioners, wherein the method comprises the steps of obtaining the outdoor environment temperature and the outdoor environment humidity; if the outdoor environment temperature and the outdoor environment humidity meet a first condition, controlling a fan to adjust the rotating speed according to the fan current; otherwise, controlling the fan to adjust the rotating speed according to the low-voltage temperature of the fan module. According to the invention, different control parameters are selected according to the outdoor environment temperature and the outdoor environment humidity to adjust the rotating speed of the fan, so that the overcurrent protection of the fan module is avoided, and the reliability of the system is improved. And the motor can not operate in a high-load state for a long time, and the service life of the motor can be effectively prolonged. The invention can automatically control the fan to reduce the rotating speed, so that the whole machine is always in the running state, thereby ensuring the indoor temperature to be constant and improving the user experience.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a fan self-adaptive control method and device during frosting, an air conditioner and a storage medium.
Background
With the development of social economy and the increasing improvement of the living standard of people, the air conditioner has been moved into thousands of households, becomes a necessity of modern life, and creates a comfortable working and living environment for users. At present, people not only use an air conditioner for refrigeration, but also use the air conditioner for heating in winter more and more frequently, so that the requirement on the stability of the air conditioner for heating operation in winter is higher and more.
At present, when an air conditioner heats in winter, an outdoor unit is easy to frost at a cold temperature. In the case of a thick frost layer, the resistance to air flow through the heat exchanger finned tubes increases, at which point the air flow rate decreases, resulting in a continuous increase in the fan current. When the current of the fan exceeds the maximum current which can be borne by the fan Module, the fan can report the fault of an Intelligent Power Module (IPM) of the direct current fan, so that the whole air conditioning system stops running. Therefore, in some severe frosting environments, the rotational speed of the fan is always at the highest speed due to the very low pressure. When the frost layer reaches a certain thickness, the air resistance is very large, and the current of the fan can be continuously increased until the fan reports overcurrent protection to cause abnormal shutdown. And the motor is in high load operation for a long time, which can affect the service life of the motor.
Disclosure of Invention
The invention solves the problems that in the prior art, the current of a fan is easy to continuously increase to cause protection shutdown under a frosting environment, and the long-time high-load operation can influence the service life of the fan.
In order to solve the above problems, the present invention provides a control method for fan self-adaptation during frosting, which includes:
acquiring outdoor environment temperature and outdoor environment humidity;
if the outdoor environment temperature and the outdoor environment humidity meet a first condition, controlling a fan to adjust the rotating speed according to the fan current;
otherwise, controlling the fan to adjust the rotating speed according to the low-voltage temperature of the fan module.
According to the invention, different control parameters are selected according to the outdoor environment temperature and humidity to adjust the rotating speed of the fan, so that the over-current protection of the fan module is avoided, and the reliability of the system is improved. And the motor can not operate in a high-load state for a long time, and the service life of the motor can be effectively prolonged. The invention can automatically control the fan to reduce the rotating speed, so that the whole machine is always in the running state, thereby ensuring the indoor temperature to be constant and improving the user experience.
Further, the controlling the fan to adjust the rotating speed according to the fan current comprises:
determining an average value of the fan current over a first time interval;
determining a rate of change of a plurality of adjacent said averages;
when the change rate is larger than a first preset threshold value, determining the average current change amount of the fan in a plurality of judgment periods according to the average value of the fan current;
and when the average current variation is larger than a second preset threshold value, controlling the fan to adjust the rotating speed according to a first rule.
The invention controls the rotating speed according to the current of the fan under the environmental condition that the outdoor unit is frosted most easily, thereby realizing automatic reduction of the rotating speed and keeping the system in the running state.
Further, the determining the average current variation of the fan in a plurality of determination periods according to the average value of the fan current includes:
and if the unit voltage variation in the judgment period exceeds a preset voltage variation threshold, rejecting the average value of the fan current in the judgment period.
According to the method, the fan current data of the time period with large variation of the unit voltage are removed, and the accuracy of judging the system state is ensured.
Further, in the step of controlling the fan to adjust the rotating speed according to a first rule, the first rule includes:
and controlling the fan to reduce the rotating speed according to the average current change amount.
The invention correspondingly adjusts the rotating speed of the fan according to the current change condition of the fan, realizes the quick and effective reduction of the high load of the fan and prolongs the service life of the motor.
Further, the first condition includes: the outdoor environment temperature is greater than or equal to a first preset environment temperature and less than a second preset environment temperature, and the outdoor environment humidity is greater than the preset humidity.
The invention reasonably judges whether the outdoor unit is in the frosting condition according to the outdoor environment temperature and humidity, further controls the fan to adjust the rotating speed and improves the accuracy of system control.
Further, after the step of controlling the fan to adjust the rotating speed according to the fan current, the method further comprises the following steps:
when the rotating speed of the fan is reduced to a preset rotating speed threshold value, whether the outdoor environment temperature and the outdoor environment humidity meet the first condition or not is judged again.
After the adjustment of the rotating speed of the primary fan is finished, whether the environmental condition is in the condition of easy frosting or not is judged again, the adjustment efficiency is effectively controlled, and the energy consumption is reduced.
Further, according to fan module low pressure temperature control the fan adjustment rotational speed includes:
and controlling the fan to adjust the rotating speed according to the low-voltage temperature of the fan module, the first preset temperature and the second preset temperature.
The invention adopts different fan rotating speed adjusting strategies under other environments which are not easy to frost, and ensures the effectiveness and accuracy of fan rotating speed control. And the control without fixed period can be realized, and the heating effect of the system is improved.
Further, the controlling the fan to adjust the rotating speed according to the low-pressure temperature of the fan module, the first preset temperature and the second preset temperature comprises:
if the low-pressure temperature of the fan module is lower than the first preset temperature, controlling the fan to adjust the rotating speed according to a second rule, wherein the second rule comprises controlling the fan to reduce the rotating speed to (M1-Ps) × 5, M1 represents the first preset temperature, and Ps represents the low-pressure temperature of the fan module;
if the low-pressure temperature of the fan module is greater than the second preset temperature, controlling the fan to adjust the rotating speed according to a third rule, wherein the third rule comprises controlling the fan to reduce the rotating speed to (Ps-M2) × 5, M2 represents the second preset temperature, and the first preset temperature is less than the second preset temperature.
The invention adjusts the rotating speed of the fan according to different conditions, is generally suitable for use environments with different temperatures and outdoor environment humidity, does not need to separately distinguish regions and climates for setting, and has wide application range.
The invention also aims to provide a fan self-adaptive control device during frosting so as to avoid abnormal shutdown caused by continuous increase of current of a fan under high-load operation under the frosting condition.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a frost-time fan adaptive control device, comprising:
an acquisition unit for acquiring an outdoor ambient temperature and an outdoor ambient humidity;
the first rotating speed adjusting unit is used for controlling the fan to adjust the rotating speed according to the fan current when the outdoor environment temperature and the outdoor environment humidity meet a first condition;
and the second rotating speed adjusting unit is used for controlling the fan to adjust the rotating speed according to the low-pressure temperature of the fan module when the outdoor environment temperature and the outdoor environment humidity meet a second condition.
According to the invention, different control parameters are selected according to the outdoor environment temperature and the outdoor environment humidity to adjust the rotating speed of the fan, so that the overcurrent protection of the fan module is avoided, and the reliability of the system is improved. And the motor can not operate in a high-load state for a long time, and the service life of the motor can be effectively prolonged. The invention has no fixed regulation period, and the system is always in the running state, thereby effectively improving the heating effect. The invention is generally suitable for use environments with different temperatures and outdoor environment humidity, does not need additional arrangement and has wide applicability.
The third objective of the present invention is to provide an air conditioner, so as to achieve adaptive rotation speed adjustment of a fan under a frosting condition, and avoid shutdown protection caused by continuous increase of current.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an air conditioner comprises a computer readable storage medium and a processor, wherein the computer readable storage medium stores a computer program, and when the computer program is read and executed by the processor, the method for controlling fan self-adaption during frosting is realized.
Compared with the prior art, the air conditioner and the fan self-adaptive control device during frosting have the same beneficial effects, and the details are not repeated.
The fourth objective of the present invention is to provide a computer-readable storage medium, so as to implement the above-mentioned adaptive control method for the fan during frosting.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a computer-readable storage medium, storing a computer program which, when read and executed by a processor, implements a method of controlling fan adaptation during frosting as described above.
Drawings
FIG. 1 is a schematic diagram illustrating an adaptive control method for a fan during frosting according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a process of controlling a fan to adjust a rotational speed according to a fan current according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating a process of controlling a fan to adjust a rotational speed according to a low-voltage temperature of a fan module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a fan adaptive control device during frosting according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The existing structure of the outdoor unit air side of the split air conditioner has the following problems: the heat exchanger is rectangular, and the fan is circular, so that the area of the heat exchanger and the area of the fan are not matched, and the pneumatic performance is reduced; the air flow enters the fan after passing through the heat exchanger with dense fins, so that the air flow on the inlet section of the fan is in a complex state, and the heat exchange and pneumatic performance of the air conditioner can be directly influenced by the flow field distribution of a system working under the condition.
When the outdoor unit of the air conditioner is in a frosting condition in winter, the resistance of air flowing through the heat exchanger fins is increased, and the current of the fan is continuously increased. When the current is too large, abnormal protection shutdown can be caused, and the running stability of the system is influenced. The invention aims to solve the technical problems and provides a fan self-adaptive control method and device during frosting, so that the rotating speed of the fan can be automatically adjusted under the frosting condition, the protection shutdown is avoided, the stable operation of the system is ensured, and the user experience is improved.
FIG. 1 is a schematic diagram illustrating a method for adaptively controlling a fan during frosting according to an embodiment of the present invention, which includes steps S11-S13.
In step S11, the outdoor ambient temperature and the outdoor ambient humidity are acquired. The temperature sensor and the humidity sensor arranged on the air conditioner acquire the outdoor ambient temperature and the outdoor ambient humidity in real time and are used for judging whether the outdoor unit is in a frosting condition or not. When outdoor environmental parameters satisfy certain conditions, a frosting phenomenon occurs, wherein the outdoor environmental temperature and humidity are important factors affecting frosting.
In step S12, if the outdoor ambient temperature and the outdoor ambient humidity satisfy a first condition, the fan is controlled to adjust the rotation speed according to the fan current. In an embodiment of the present invention, the first condition includes: the outdoor environment temperature is greater than or equal to the first preset environment temperature and less than the second preset environment temperature, namely the outdoor environment temperature Tao meets the condition that Tao is greater than or equal to T1 and less than T2, and the humidity is greater than X. According to the summary and analysis of experimental data, the possible temperature range in which the frosting phenomenon is easy to occur is-8 ℃ to 7 ℃, and the humidity range is 60% to 70%. When the outdoor environment temperature is higher than 7 ℃ but the humidity is less than 60%, the frosting phenomenon is not easy to occur because the air dew point temperature is higher than the surface temperature of the outdoor heat exchanger; when the outdoor environment temperature is lower than-8 ℃, because the absolute moisture content of the air is small, the frosting phenomenon is not easy to occur. It can be seen that the lower the outdoor temperature is, the more frost is formed. The outdoor unit can be effectively judged whether to be in the frosting condition or not by selecting the proper first preset environment temperature T1, the second preset environment temperature T2 and the preset humidity X, so that the rotating speed of the fan is effectively controlled to be adjusted, the situation that the fan is shut down in a protection mode due to overlarge current is avoided, and the situation that the heating effect of the system is influenced due to the fact that the current adjustment of the fan is started too early can also be avoided.
In the embodiment of the invention, the value range of T1 is (-5 ℃, 8 ℃) and the value range of T2 is (5 ℃, 7 ℃) and the value range of X is (60%, 70%), wherein T1 is preferably-6 ℃, T2 is preferably 5 ℃ and X is preferably 65%. In this case, the outer unit is most likely to be frosted. The values of T1, T2 and X are obtained according to experimental data or can be set according to experience.
When the outdoor environment temperature and the outdoor environment humidity meet the first condition, fan current control is carried out, namely, the fan is controlled to adjust the rotating speed according to the fan current.
Otherwise, in step S13, the fan is controlled to adjust the speed according to the low-pressure temperature of the fan module. In the embodiment of the invention, when the outdoor environment temperature and the outdoor environment humidity do not meet the first condition, namely any one of the conditions that Tao is more than or equal to T1 and less than T2 and the humidity is more than X is not met, low-voltage control is carried out, the fan is controlled to adjust the rotating speed according to the low-voltage temperature of the fan module, wherein the low-voltage temperature of the fan module is detected by a low-voltage sensor arranged on the air conditioner. At the moment, the frost layer is relatively thin, the resistance is small, overcurrent protection cannot occur, and the fan is controlled to adjust the rotating speed according to the low-voltage temperature of the fan module.
Fig. 2 is a schematic flow chart illustrating the process of controlling the fan to adjust the rotation speed according to the fan current in step S12 according to the embodiment of the present invention, which includes steps S121 to S124.
In step S121, an average value of the fan current is calculated in a first time interval (i.e., detection period) Δ t. In the embodiment of the present invention, the first time interval Δ t is set to 40s, but other values may be adopted. However, the value is not easy to select too long or too short, otherwise, the average value of the fan current in one detection period may have a large deviation, which affects the accuracy of system control. And obtaining a fan currents in the first time interval delta t, and then taking an average value as I1, wherein the value range of a is 4-6, and preferably 4.
In step S122, a variation rate Δ I of the average values of n adjacent ones is calculated. In the embodiment of the present invention, the average value of the fan current in the first detection period is I1, the average values of the fan current in the second and third detection periods are I2 and I3, the variation rate of the average value of the fan current in the adjacent first and second detection periods is Δ I1 ═ I2-I1)/I1, and the variation rate of the average value of the fan current in the second and third detection periods is Δ I2 ═ I3-I2)/I2, so that the variation rate of the average value of the fan current in the adjacent three periods is Δ I ([ delta ] I1+ [ delta ] I2)/2, and so on according to the difference of the values of n. In the embodiment of the invention, the average value of n is calculated by selecting at least 5 detection periods and selecting 5-7 detection periods, so as to improve the control precision.
In step S123, when the change rate Δ I is greater than a first preset threshold, calculating an average current change amount of the fan in a plurality of (e.g., m) determination periods according to an average value of the fan current, where a value range of the first preset threshold is (5%, 10%), and preferably 5%. When the change rate delta I of the average value of the current of the fan is larger than a first preset threshold value, the frost layer of the heat exchanger is obviously increased, the influence on the performance of the system is large, and the rotating speed of the fan needs to be adjusted in time so as to avoid abnormal protection shutdown caused by continuous increase of the current of the fan. In the embodiment of the invention, m can be 3-5, and is preferably 4. Assuming that the average value of the fan current in one determination period is I1, I2, I3, I4 and I5, the fan current variation in the determination period is [ (I5-I4) + … + (I2-I1) ]/4, and the average value of the fan current variations calculated in 4 determination periods is obtained, which is the average current variation of the fans in the multiple determination periods.
Step S123 in the embodiment of the present invention further includes: and the variation of the unit voltage is judged in an auxiliary mode, if the variation of the unit voltage in the judgment period exceeds a preset voltage variation threshold, the average value of the fan current in the judgment period is rejected, wherein the preset voltage variation threshold is 10 v. When the variation of the unit voltage in a judgment period exceeds +/-10V, namely the variation of the unit voltage is greater than 10V, the fan current variation in the judgment period is eliminated, the eliminated data of a judgment period after the judgment period is supplemented into the calculation of the average current variation of the fan, and the calculation is ensured according to the fan current data of m judgment periods.
In step S124, when the average current variation is greater than a second preset threshold, controlling the fan to adjust the rotation speed according to a first rule, where a value range of the second preset threshold is (0.2, 0.4), and is preferably 0.2; the first rule includes controlling the fan to reduce the speed according to the average current change amount. After the system operates stably, if the average current variation of the fan is larger than 0.2A, the frosting degree of the outdoor unit is poor, and the rotating speed of the motor needs to be adjusted as soon as possible to avoid abnormal shutdown caused by overlarge current. At this time, the fan can be controlled to adjust the rotating speed in a mode of reducing the rotating speed of 1Hz per 0.1A of the average current variation, so as to reduce the current of the fan. In the embodiment of the invention, the fan rotation speed is reduced and then continues to be detected in the next detection period until the fan rotation speed is reduced to the critical point which can influence the system performance. In the environment of heating and defrosting in severe conditions (such as the environment (-6 ℃, 5 ℃) and the humidity of about 65%), the performance of the system is basically not changed when the fan reduces a certain rotating speed, and the common rotating speed of the fan is reduced within 20% (which is an empirical value), that is, 80% of the common rotating speed of the fan is assumed as a critical point and is not lower than the rotating speed.
Fig. 3 is a schematic flow chart illustrating a process of controlling the fan to adjust the rotation speed according to the low-pressure temperature of the fan module in step S13 according to the embodiment of the present invention, which includes steps S131 to S133.
In step S131, if the low-pressure temperature of the fan module is lower than the first preset temperature, the fan is controlled to adjust the rotation speed according to a second rule, wherein the value range of the first preset temperature M1 is (8 ℃, 10 ℃), and preferably 8 ℃. In the embodiment of the invention, when the low-pressure temperature Ps of the fan module is less than M1, the fan is controlled to reduce the rotation speed according to the second rule, that is, the fan reduction rotation speed is (M1-Ps) × 5.
In step S132, if the low-pressure temperature of the fan module is greater than the second preset temperature, the fan is controlled to adjust the rotation speed according to a third rule, where the second preset temperature M2 is within a range of (12 ℃, 14 ℃), and preferably 12 ℃. In the embodiment of the invention, when the low-pressure temperature Ps > M2 of the fan module, the fan is controlled to reduce the rotation speed according to the third rule, that is, the fan reduction rotation speed is (Ps-M2) × 5.
In step S133, if the low-pressure temperature of the fan module is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, the fan is controlled not to adjust the rotation speed, that is, when M1 is greater than or equal to Ps and less than or equal to M2, the original rotation speed of the fan is maintained unchanged.
In the embodiment of the present invention, after the step of controlling the fan to adjust the rotation speed according to the fan current in step S12, the method further includes: when the rotating speed of the fan is reduced to a preset rotating speed threshold value, whether the outdoor environment temperature and the outdoor environment humidity meet the first condition or not is judged again, wherein the preset rotating speed threshold value is 80% of the rotating speed of the fan.
When judging that the outdoor environment temperature and the outdoor environment humidity meet the first condition, when carrying out fan current control, detecting the outdoor environment temperature and the outdoor environment humidity in real time, but after finishing 1 fan current control, judging whether the outdoor environment temperature and the outdoor environment humidity meet the first condition again, and thus judging that the fan current control is not required to be carried out continuously. When low-voltage control is carried out, the outdoor environment temperature and the outdoor environment humidity can be detected in real time, and when the outdoor environment temperature and the outdoor environment humidity meet a first condition, the fan current control is started; and when one of the outdoor environment temperature and the outdoor environment humidity does not meet the first condition, the system is always in low-pressure control operation.
A specific numerical example is given below to better explain the present invention.
And when the outdoor environment temperature is detected to be 3 ℃ and the humidity is detected to be 65%, judging to select the fan current control:
(1) the fan current is detected and recorded in 10 th, 20 th, 30 th and 40 th seconds by taking 40s as a detection period, a fan current average value I1 is obtained, then 5 continuous current average values I1, I2, I3, I4 and I5 are detected and calculated, the change rate delta I1 of the first period and the second period is obtained as (I2-I1)/I1, 4 change rates are obtained in sequence, and then the average change rate delta I of the 5 detection periods is obtained as (delta I1 plus delta I2 plus delta I3 plus delta I4)/4. And (3) judging whether the delta I is more than 5%, if so, judging that the frost layer of the heat exchanger is obviously increased, entering (2), and if not, continuing to judge (1).
(2) The average value of the current in each judgment period is I1, I2, I3, I4 and I5, the fan current variation in each judgment period is [ (I5-I4) + … + (I2-I1) ]/4 (the judgment period with the voltage variation in the judgment period exceeding +/-10V is eliminated), and the average value of the current variation in the 4 judgment periods is obtained, namely the fan average current variation. And when the average current variation of the fan is larger than 0.2A, reducing the fan speed (recommending that the speed is reduced by 1Hz every 0.1A).
(3) And entering the next detection period until the rotating speed of the fan is reduced to a critical point influencing the performance of the system. (the performance at this time is not substantially affected when the rotation speed is reduced to within 80% of the maximum rotation speed of the fan).
According to the invention, whether the fan is in a frosting condition is judged through the outdoor environment temperature and humidity, and the fan rotating speed is adjusted according to different environment conditions, so that the overcurrent protection of the fan module can be effectively avoided. And the motor can not be operated in a high-load state for a long time, so that the reliability of the system is improved and the service life of the motor is prolonged. The invention automatically controls the motor to reduce the rotating speed, so that the whole machine is always in the running state, thereby ensuring the indoor temperature to be constant. The fan rotating speed adjustment of the invention has no fixed period, is generally suitable for use environments with different temperatures and humidities, does not need to separately distinguish regions and climates for setting, has wide applicability, and effectively improves the heating effect of users.
Fig. 4 is a schematic structural diagram of a fan adaptive control device 400 during frosting according to an embodiment of the present invention, including an obtaining unit 401, a first rotation speed adjusting unit 402, and a second rotation speed adjusting unit 403, where:
the acquiring unit 401 is configured to acquire an outdoor environment temperature and an outdoor environment humidity;
the first rotation speed adjusting unit 402 is configured to control the fan to adjust the rotation speed according to the fan current when the outdoor environment temperature and the outdoor environment humidity satisfy the first condition;
the second rotation speed adjusting unit 403 is configured to control the fan to adjust the rotation speed according to the low-pressure temperature of the fan module when the outdoor environment temperature and the outdoor environment humidity satisfy the second condition.
According to the invention, different control parameters are selected according to the outdoor environment temperature and the outdoor environment humidity to adjust the rotating speed of the fan, so that the overcurrent protection of the fan module is avoided, and the reliability of the system is improved. And the motor can not operate in a high-load state for a long time, and the service life of the motor can be effectively prolonged. The invention has no fixed regulation period, and the system is always in the running state, thereby effectively improving the heating effect. The invention is generally suitable for use environments with different temperatures and humidities, does not need additional arrangement and has wide applicability.
The embodiment of the invention also provides an air conditioner, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and the computer program is read by the processor and runs to realize the self-adaptive control method of the fan during frosting.
The embodiment of the invention also provides a computer-readable storage medium, which stores a computer program, and when the computer program is read and executed by a processor, the method for controlling the fan self-adaption during frosting is realized.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. A self-adaptive control method for a draught fan during frosting is characterized by comprising the following steps:
acquiring outdoor environment temperature and outdoor environment humidity;
if the outdoor environment temperature and the outdoor environment humidity meet a first condition, controlling a fan to adjust the rotating speed according to the fan current;
otherwise, controlling the fan to adjust the rotating speed according to the low-voltage temperature of the fan module;
the controlling the fan to adjust the rotating speed according to the fan current comprises:
determining an average value of the fan current over a first time interval;
determining a rate of change of a plurality of adjacent said averages;
when the change rate is larger than a first preset threshold value, determining the average current change amount of the fan in a plurality of judgment periods according to the average value of the fan current;
when the average current variation is larger than a second preset threshold, controlling the fan to adjust the rotating speed according to a first rule;
the control according to fan module low pressure temperature fan adjustment rotational speed includes: controlling the fan to adjust the rotating speed according to the low-voltage temperature of the fan module, the first preset temperature and the second preset temperature; if the low-voltage temperature of the fan module is lower than the first preset temperature, controlling the fan to adjust the rotating speed according to a second rule; if the low-voltage temperature of the fan module is higher than the second preset temperature, controlling the fan to adjust the rotating speed according to a third rule;
the first condition includes: the outdoor environment temperature is greater than or equal to a first preset environment temperature and less than a second preset environment temperature, and the outdoor environment humidity is greater than the preset humidity;
the first rule includes: controlling the fan to reduce the rotating speed according to the average current change amount;
the second rule includes controlling the fan to reduce the rotational speed to
M1 represents the first preset temperature, Ps represents the fan module low-pressure temperature; the third rule includes controlling the fan to reduce the rotational speed to
And M2 represents the second preset temperature, and the first preset temperature is smaller than the second preset temperature.
2. The adaptive control method for the fan during the frosting process according to claim 1, wherein the determining the average current variation of the fan in a plurality of judgment periods according to the average value of the fan current comprises:
and if the unit voltage variation in the judgment period exceeds a preset voltage variation threshold, rejecting the average value of the fan current in the judgment period, wherein the judgment period comprises a plurality of first time intervals.
3. The method for adaptively controlling the fan during frosting according to claim 1 or 2, wherein after the step of controlling the fan to adjust the rotation speed according to the fan current, the method further comprises:
when the rotating speed of the fan is reduced to a preset rotating speed threshold value, whether the outdoor environment temperature and the outdoor environment humidity meet the first condition or not is judged again.
4. The utility model provides a fan self-adaptation's controlling means when frosting which characterized in that includes:
an acquisition unit for acquiring an outdoor ambient temperature and an outdoor ambient humidity;
the first rotating speed adjusting unit is used for controlling the fan to adjust the rotating speed according to the fan current when the outdoor environment temperature and the outdoor environment humidity meet a first condition;
the second rotating speed adjusting unit is used for controlling the fan to adjust the rotating speed according to the low-pressure temperature of the fan module when the outdoor environment temperature and the outdoor environment humidity meet a second condition;
the controlling the fan to adjust the rotating speed according to the fan current comprises:
determining an average value of the fan current over a first time interval;
determining a rate of change of a plurality of adjacent said averages;
when the change rate is larger than a first preset threshold value, determining the average current change amount of the fan in a plurality of judgment periods according to the average value of the fan current;
when the average current variation is larger than a second preset threshold, controlling the fan to adjust the rotating speed according to a first rule;
the control according to fan module low pressure temperature fan adjustment rotational speed includes: controlling the fan to adjust the rotating speed according to the low-voltage temperature of the fan module, the first preset temperature and the second preset temperature; if the low-voltage temperature of the fan module is lower than the first preset temperature, controlling the fan to adjust the rotating speed according to a second rule; if the low-voltage temperature of the fan module is higher than the second preset temperature, controlling the fan to adjust the rotating speed according to a third rule;
the first condition includes: the outdoor environment temperature is greater than or equal to a first preset environment temperature and less than a second preset environment temperature, and the outdoor environment humidity is greater than the preset humidity;
the first rule includes: controlling the fan to reduce the rotating speed according to the average current change amount;
the second rule includes controlling the fan to reduce the rotational speed to
M1 represents the first preset temperature, Ps represents the fan module low-pressure temperature; the third rule includes controlling the fan to reduce the rotational speed to
And M2 represents the second preset temperature, and the first preset temperature is smaller than the second preset temperature.
5. An air conditioner comprising a computer-readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and executed to implement the fan-when-frosting adaptive control method according to any one of claims 1 to 3.
6. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the fan-when-frosting-adaptive control method according to any one of claims 1 to 3.
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| CN107270479A (en) * | 2017-06-19 | 2017-10-20 | 广东美的暖通设备有限公司 | The control method and control system of outdoor fan of air conditioner |
| CN108488996A (en) * | 2018-03-20 | 2018-09-04 | 海信（山东）空调有限公司 | A kind of air conditioner defrosting control method, device and air conditioner |
| CN109269019A (en) * | 2018-10-10 | 2019-01-25 | 珠海格力电器股份有限公司 | Defrosting control method and device and heating equipment |
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| JPS6370039A (en) * | 1986-09-10 | 1988-03-30 | Hitachi Ltd | Air conditioner |
| JP2014102045A (en) * | 2012-11-21 | 2014-06-05 | Fujitsu General Ltd | Air conditioner |
| CN107238183A (en) * | 2017-06-26 | 2017-10-10 | 广东美的暖通设备有限公司 | Outdoor fan control method, device and computer-readable recording medium |
| CN107726557B (en) * | 2017-09-22 | 2020-11-03 | 青岛海尔空调器有限总公司 | Control method and system of air conditioner under low-temperature high-humidity heating working condition |
| CN109386966A (en) * | 2018-09-21 | 2019-02-26 | 珠海格力电器股份有限公司 | Defrosting control method and device for heat pump unit, storage medium and heat pump unit |
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| CN107270479A (en) * | 2017-06-19 | 2017-10-20 | 广东美的暖通设备有限公司 | The control method and control system of outdoor fan of air conditioner |
| CN108488996A (en) * | 2018-03-20 | 2018-09-04 | 海信（山东）空调有限公司 | A kind of air conditioner defrosting control method, device and air conditioner |
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