CN105091185A - Method and device used for controlling air conditioner and air conditioner - Google Patents
Method and device used for controlling air conditioner and air conditioner Download PDFInfo
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- CN105091185A CN105091185A CN201410162702.XA CN201410162702A CN105091185A CN 105091185 A CN105091185 A CN 105091185A CN 201410162702 A CN201410162702 A CN 201410162702A CN 105091185 A CN105091185 A CN 105091185A
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- 238000000034 method Methods 0.000 title claims abstract description 60
- 230000008859 change Effects 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 15
- 238000005057 refrigeration Methods 0.000 claims description 14
- 230000000694 effects Effects 0.000 abstract description 14
- 230000002035 prolonged effect Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
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- 238000005859 coupling reaction Methods 0.000 description 3
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- 230000007423 decrease Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
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Classifications
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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
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- 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
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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
- F24F11/65—Electronic processing for selecting an operating mode
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the invention discloses a method and a device used for controlling an air conditioner and the air conditioner, pertaining to the technical field of control technology for air conditioners. Therefore, service lifetime of the air conditioner is increased while the experience effect of a user is improved. The air conditioner comprises a compressor having working frequency of f and an inner fan. The method for controlling the air conditioner provided by the embodiment comprises following steps: acquiring first value of a pre-set index parameter, comprising machine current and/or rate of change for machine current, of the air conditioner when the air conditioner is in the working condition of excess load; unloading loads of the air conditioner if the first value is greater than the pre-set threshold value; acquiring second value for the index parameter after unloading loads of the air conditioner; and controlling the air conditioner to stably operate according to second value and f when the second value is smaller than or equal to the pre-set threshold value. When the loads of the air conditioner are unloaded, working frequency of the compressor is f.
Description
Technical Field
The invention relates to the technical field of air conditioner control, in particular to a method and a device for controlling an air conditioner and the air conditioner.
Background
In order to prolong the service life of the variable frequency air conditioner, when the air conditioner is in an overload working condition, the air conditioner generally needs to be subjected to protection control such as over-high protection of the current of the whole air conditioner, over-high protection of the temperature of the inner and outer coil pipes, over-high protection of the exhaust temperature and the like. Specifically, corresponding protection limit values are set in a control program, and when certain protection parameters (such as the current of the whole machine, the temperature of the inner and outer coils, the exhaust temperature and the like) are detected to exceed the corresponding protection limit values (such as the current limit values, the temperature limit values of the inner and outer coils, the exhaust temperature limit values and the like), the protection parameters are reduced by adjusting the working frequency of the compressor, so that the variable frequency air conditioner can stably run.
Due to the control return difference of the current or the poor precision of the temperature sensor (used for detecting the temperature of the inner and outer coils or the exhaust temperature), the protection control method for the air conditioner can cause poor user experience effect or fail to play a protection role. The following description will be given by taking "protection of the air conditioner against excessive current of the whole air conditioner" as an example: assuming that the current protection limit value is 8A, the release current value is 6A (for increasing the working frequency of the compressor when the current of the whole machine is less than 6A), and the current control return difference is +/-0.5A; in the process of protecting and controlling the air conditioner, at a certain moment, the current of the whole air conditioner is increased due to the load change of the air conditioner and exceeds the current protection limit value, and the working frequency of a compressor is f; then, when the air conditioner is operating stably, the overall current may be any value in the interval [5.5A, 8.5A ]. If the current of the whole machine is any value in the interval [5.5A, 8A), the working frequency of the compressor is any value in the interval [ f-delta f, f), wherein delta f is more than 0; the higher the working frequency of the compressor is, the larger the heat or cold quantity which can be provided for a user in unit time of the air conditioner is, so that the indoor temperature change rate is higher, namely, the indoor temperature can be adjusted to the target temperature indicated by the user more quickly, and thus, the experience effect of the user is better, and the experience effect of the user is poorer in the protection control process compared with the condition that the compressor runs at the working frequency f. If the current of the whole machine is any value of (8A, 8.5A), the protection effect cannot be achieved.
Disclosure of Invention
The embodiment of the invention provides a method and a device for controlling an air conditioner and the air conditioner, which can prolong the service life of the air conditioner and improve the experience effect of a user.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, a method for controlling an air conditioner including a compressor having an operating frequency f is provided, the method comprising:
when the air conditioner is in an overload working condition, acquiring a first value of a preset index parameter of the air conditioner; the preset index parameters comprise the current of the whole machine and/or the change rate of the current of the whole machine;
if the first value is larger than a preset threshold value, unloading the load of the air conditioner; wherein, in the process of unloading the load of the air conditioner, the working frequency of the compressor is f;
after the load of the air conditioner is unloaded, acquiring a second value of the index parameter;
and when the second value is smaller than or equal to the preset threshold value, controlling the air conditioner to stably operate according to the second value and the f.
With reference to the first aspect, in a first possible implementation manner, the air conditioner further includes an inner fan; unloading the load of the air conditioner, comprising:
and unloading the load of the air conditioner by adjusting the rotating speed of the inner fan.
With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner, the unloading the load of the air conditioner by adjusting the rotation speed of the internal fan includes:
when the control mode of the air conditioner is a refrigeration mode, reducing the rotating speed of the inner fan to obtain a first rotating speed; or,
and when the control mode of the air conditioner is a heating mode, increasing the rotating speed of the inner fan to obtain a second rotating speed.
With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner, the first rotation speed is greater than or equal to a preset minimum rotation speed; or the second rotating speed is less than or equal to the preset highest rotating speed.
With reference to the first possible implementation manner of the first aspect, in a fourth possible implementation manner, when the air conditioner is in a steady operation, the rotation speed of the inner fan is r, and the preset rotation speed of the inner fan is r0, where the method further includes:
and after the air conditioner stably operates for a preset time, adjusting the rotating speed of the inner fan from r to r 0.
With reference to the first aspect, in a fifth possible implementation manner, the method further includes:
when the control mode of the air conditioner is a refrigeration mode, determining that the air conditioner is in an overload working condition when the ambient temperature of the air conditioner is greater than or equal to a first temperature threshold value; or,
when the control mode of the air conditioner is a heating mode, and when the ambient temperature of the air conditioner is greater than or equal to a second temperature threshold value, determining that the air conditioner is in an overload working condition.
With reference to the first possible implementation manner of the first aspect, in a sixth possible implementation manner, the adjusting the rotation speed of the inner fan includes:
and adjusting the rotating speed of the inner fan according to the preset rotating speed variation amplitude.
In a second aspect, there is provided an apparatus for controlling an air conditioner including a compressor having an operating frequency f, the apparatus comprising:
the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a first value of a preset index parameter of the air conditioner when the air conditioner is in an overload working condition; the preset index parameters comprise the current of the whole machine and/or the change rate of the current of the whole machine;
the unloading unit is used for unloading the load of the air conditioner if the first value is larger than a preset threshold value; wherein, in the process of unloading the load of the air conditioner, the working frequency of the compressor is f;
the obtaining unit is further used for obtaining a second value of the index parameter after the load of the air conditioner is unloaded;
and the control unit is used for stably operating according to the second value and the f when the second value is less than or equal to the preset threshold value.
With reference to the second aspect, in a first possible implementation manner, the air conditioner further includes an inner fan; the unloading unit is used for unloading the load of the air conditioner by adjusting the rotating speed of the inner fan.
With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner, the unloading unit is configured to: when the control mode of the air conditioner is a refrigeration mode, reducing the rotating speed of the inner fan to obtain a first rotating speed; or when the control mode of the air conditioner is the heating mode, increasing the rotating speed of the inner fan to obtain a second rotating speed.
With reference to the second possible implementation manner of the second aspect, in a third possible implementation manner, the first rotation speed is greater than or equal to a preset minimum rotation speed; or the second rotating speed is less than or equal to the preset highest rotating speed.
With reference to the first possible implementation manner of the second aspect, in a fourth possible implementation manner, when the air conditioner is in a stable operation, the rotation speed of the inner fan is r, the preset rotation speed of the inner fan is r0, and the apparatus further includes:
and the adjusting unit is used for adjusting the rotating speed of the inner fan from r to r0 after the air conditioner operates stably for a preset time.
With reference to the second aspect, in a fifth possible implementation manner, the apparatus further includes:
the air conditioner control device comprises a determining unit, a judging unit and a control unit, wherein the determining unit is used for determining that the air conditioner is in an overload working condition when the control mode of the air conditioner is a refrigeration mode and the ambient temperature of the air conditioner is greater than or equal to a first temperature threshold; or when the control mode of the air conditioner is the heating mode and the ambient temperature of the air conditioner is greater than or equal to a second temperature threshold value, determining that the air conditioner is in an overload working condition.
With reference to the first possible implementation manner of the second aspect, in a sixth possible implementation manner, the unloading unit is configured to adjust the rotation speed of the inner fan according to a preset rotation speed variation range.
In a third aspect, an air conditioner is provided, the air conditioner comprising: a compressor and any one of the above second aspects provides an apparatus for controlling an air conditioner.
In the scheme, when the air conditioner is in an overload working condition, the preset index parameter of the air conditioner comprises the current of the whole machine and/or the change rate of the current of the whole machine by obtaining a first value of the preset index parameter; when the first value is larger than the preset threshold value, unloading the load of the air conditioner under the condition that the working frequency f of the compressor is not changed, and acquiring a second value of the index parameter; and when the second value is less than or equal to the preset threshold value, controlling the air conditioner to stably operate according to the second value and f. The scheme ensures that the preset index parameter does not exceed the preset threshold value, so that the service life of the air conditioner can be prolonged; meanwhile, the working frequency of the compressor is not changed, compared with the prior art, the air conditioner can provide heat or cold for a user in unit time, so that the indoor temperature difference change rate is increased, namely, the indoor temperature can be adjusted to the target temperature indicated by the user more quickly, and the experience effect of the user is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flowchart illustrating a method for controlling an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of another method for controlling an air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of another method for controlling an air conditioner according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an apparatus for controlling an air conditioner according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another apparatus for controlling an air conditioner according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another apparatus for controlling an air conditioner according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, a method for controlling an air conditioner according to an embodiment of the present invention includes a compressor, where an operating frequency of the compressor is f, and the method includes:
101: when the air conditioner is in an overload working condition, acquiring a first value of a preset index parameter of the air conditioner; the preset index parameters comprise the current of the whole machine and/or the change rate of the current of the whole machine.
The execution main body of the embodiment may be the air conditioner itself, or may be an entity device independent of the air conditioner. The "air conditioner" may be a variable frequency air conditioner.
The "first value of the preset index parameter" refers to the current value of the preset index parameter when the "obtaining" action in step 101 is performed. The preset index parameter may include the following three cases: 1) the current of the whole machine; 2) rate of change of current of the whole machine; 3) the total machine current and the total machine current change rate. The embodiment of the invention does not limit the specific mode for obtaining the preset index parameter, and can be realized by utilizing the mode in the prior art.
When the control mode of the air conditioner is a refrigeration mode, the 'overload working condition of the air conditioner' means that the heat which needs to be absorbed by the air conditioner in unit time exceeds the heat which can be absorbed by the air conditioner in normal operation; when the control mode of the air conditioner is the heating mode, the 'overload condition of the air conditioner' means that the heat quantity which the air conditioner needs to provide in unit time exceeds the heat quantity which the air conditioner can provide in normal operation. Among them, the control mode of the air conditioner is generally designated by a user.
Optionally, the method may further include: when the control mode of the air conditioner is a refrigeration mode, determining that the air conditioner is in an overload working condition when the ambient temperature of the air conditioner is greater than or equal to a first temperature threshold value; or when the control mode of the air conditioner is the heating mode and the ambient temperature of the air conditioner is greater than or equal to a second temperature threshold value, determining that the air conditioner is in an overload working condition. It should be noted that, during specific implementation, it may also be determined that the air conditioner is in an overload condition through other manners, which is not limited in the embodiment of the present invention.
102: if the first value is larger than a preset threshold value, unloading the load of the air conditioner; and in the process of unloading the load of the air conditioner, the working frequency of the compressor is f.
The preset threshold value is the maximum protection value which can be reached by the preset index parameter under the condition of ensuring the normal operation and the service life of the air conditioner; the "preset threshold" may include: a preset current threshold and/or a preset current rate of change threshold.
When the preset index parameter is the current of the whole machine, the fact that the first value is larger than the preset threshold value means that: the first value of the current of the whole machine is larger than a preset current threshold value; when the preset index parameter is the current change rate of the whole machine, the fact that the first value is larger than the preset threshold value means that: the first value of the current change rate of the whole machine is larger than a preset current change rate threshold value; when the preset index parameter is the current of the whole machine and the change rate of the current of the whole machine, the condition that the first value is larger than the preset threshold value comprises any one or more of the following conditions: the first value of the current of the whole machine is larger than a preset current threshold value, and the first value of the current change rate of the whole machine is larger than a preset current change rate threshold value.
The air conditioner also comprises an inner fan; optionally, unloading the load of the air conditioner includes: and unloading the load of the air conditioner by adjusting the rotating speed of the inner fan. The method specifically comprises the following steps: when the control mode of the air conditioner is a refrigeration mode, reducing the rotating speed of the inner fan to obtain a first rotating speed; or when the control mode of the air conditioner is the heating mode, increasing the rotating speed of the inner fan to obtain a second rotating speed.
In order to prevent the internal fan from stalling, optionally, the first rotation speed may be set to be greater than or equal to a preset minimum rotation speed; or, in order to guarantee the normal operation and the service life of the air conditioner, optionally, the second rotation speed may be set to be less than or equal to a preset maximum rotation speed.
In order to avoid the problem that the air output of the air conditioner changes greatly due to the large change amplitude of the rotation speed of the inner fan, so that the user experience is poor, optionally, step 102 may include: and adjusting the rotating speed of the inner fan according to the preset rotating speed variation amplitude.
103: and acquiring a second value of the index parameter after unloading the load of the air conditioner.
Illustratively, the index parameter includes a total machine current and/or a total machine current change rate. Generally, the overall current may vary as the load of the air conditioner increases/decreases, and accordingly, the rate of change of the overall current may vary as the load of the air conditioner increases/decreases.
104: and when the second value is smaller than or equal to the preset threshold value, controlling the air conditioner to stably operate according to the second value and the f.
When the preset index parameter is the current of the whole machine, the fact that the second value is smaller than or equal to the preset threshold value means that: the second value of the current of the whole machine is less than or equal to a preset current threshold; when the preset index parameter is the current change rate of the whole machine, the fact that the second value is smaller than or equal to the preset threshold value means that: the second value of the current change rate of the whole machine is smaller than or equal to a preset current change rate threshold value; when the preset index parameter is the current of the whole machine and the change rate of the current of the whole machine, the fact that the second value is smaller than or equal to the preset threshold value means that: and the second value of the current of the whole machine is smaller than or equal to the preset current threshold, and meanwhile, the second value of the current change rate of the whole machine is smaller than or equal to the preset current change rate threshold.
Illustratively, step 104 may be implemented as: and when the second value is smaller than or equal to the preset threshold value, controlling the air conditioner to stably operate according to the condition that the rotating speed of the inner fan is the second value and the working frequency of the compressor is f. In this case, the "stable operation" means reliable operation, that is, in this operating state, the purpose of protecting the air conditioner can be achieved.
Optionally, when the air conditioner is in stable operation, the rotation speed of the inner fan is r, and the preset rotation speed of the inner fan is r0, where the method further includes: and after the air conditioner stably operates for a preset time, adjusting the rotating speed of the inner fan from r to r 0. Illustratively, the preset rotation speed r0 of the inner fan is determined by the operation state of the air conditioner (including high wind operation, medium wind operation and low wind operation) when the rotation speed of the inner fan is not adjusted, and the operation state can be designated by a user.
It should be noted that the method may further include: when the second value is greater than the preset threshold, the load of the air conditioner continues to be unloaded, or a method of controlling the air conditioner in the related art is performed.
According to the method for controlling the air conditioner, when the air conditioner is in an overload working condition, a first value of a preset index parameter of the air conditioner is obtained, wherein the preset index parameter comprises the current of the whole air conditioner and/or the change rate of the current of the whole air conditioner; when the first value is larger than the preset threshold value, unloading the load of the air conditioner under the condition that the working frequency f of the compressor is not changed, and acquiring a second value of the index parameter; and when the second value is less than or equal to the preset threshold value, controlling the air conditioner to stably operate according to the second value and f. The scheme ensures that the preset index parameter does not exceed the preset threshold value, so that the service life of the air conditioner can be prolonged; meanwhile, the working frequency of the compressor is not changed, compared with the prior art, the air conditioner can provide heat or cold for a user in unit time, so that the indoor temperature difference change rate is increased, namely, the indoor temperature can be adjusted to the target temperature indicated by the user more quickly, and the experience effect of the user is improved.
The method for controlling the air conditioner will be described below with reference to specific embodiments. It should be noted that, in the following specific embodiment, the operating frequency of the compressor is f, the preset rotation speed variation range of the internal fan is a, and the execution main bodies are all air conditioners. The "preset index parameter" in the first embodiment is specifically a complete machine current, and the "preset threshold" in the first embodiment is specifically a preset current threshold. For the following explanation of the embodiment, reference may be made to the first embodiment.
Example 1
In this embodiment, the control mode of the air conditioner is a cooling mode.
As shown in fig. 2, the method includes:
201: the control mode of the air conditioner is determined as a cooling mode.
202: and judging whether the ambient temperature of the air conditioner is greater than or equal to a first temperature threshold value.
If yes, indicating that the air conditioner is in an overload working condition, executing step 203; if not, the air conditioner is not in the overload working condition, and the operation is finished.
It should be noted that, in this embodiment, a specific value of the "first temperature threshold" is not limited, and may be determined according to factors such as a ventilation effect of an environment where the air conditioner is located. Alternatively, the first temperature threshold may be 45 ℃.
203: and judging whether the running state of the air conditioner is low wind running or not.
If not, go to step 204; if yes, the process is ended.
For example, the operation state of the air conditioner may include: high wind operation, medium wind operation, and low wind operation, the operation state may be specified by a user. Each operating state corresponds to a preset rotating speed of the inner fan, wherein the preset rotating speed can be a numerical value or a numerical range. After the operation state of the air conditioner is determined, the inner fan generally operates according to the preset rotating speed of the inner fan corresponding to the operation state.
It should be noted that, in order to prevent the internal fan from stopping, a preset minimum rotation speed may be set in the air conditioner. Generally, the "preset minimum rotation speed" may be set to a preset rotation speed corresponding to a low wind operation; or a value within an adjustable range based on a preset rotation speed corresponding to low wind operation, for example, adding 50r/min (revolutions per minute) to the preset rotation speed corresponding to low wind operation. In the manner of setting "the preset minimum rotation speed" as described above, it is considered in the present embodiment that: when the running state of the air conditioner is low-wind running, the rotating speed of the inner fan cannot be reduced; that is, when the determination result of step 203 is yes, it is ended. The method for using the preset minimum rotation speed may refer to the relevant steps in this embodiment.
204: the method comprises the steps of obtaining a first value of the current of the whole air conditioner and the current rotating speed of an inner fan.
205: and judging whether the first value is larger than a preset current threshold value or not.
If yes, go to step 206; if not, the description is that the protection control of the air conditioner is not needed at this time, that is, the control according to the method provided in the present embodiment is not needed, and then the process is ended.
206: and performing the ith difference calculation on the current rotating speed and the preset rotating speed variation amplitude.
Wherein i is more than or equal to 1, i is an integer, and the initial value of i is 1.
For example, when i is equal to 1, if the preset rotation speed is a number, the "current rotation speed" in step 206 is generally the preset rotation speed corresponding to the "operating state of the air conditioner" in step 203; if the preset rotation speed is a range of values, the "current rotation speed" in step 206 is generally one of the preset rotation speeds corresponding to the "operation state of the air conditioner" in step 203. When i is greater than 1, the "current rotation speed" in step 206 is the "first rotation speed" obtained when step 208 is executed i-1 th time, wherein n is greater than or equal to 2, and n is an integer.
207: and judging whether the value obtained by the ith difference calculation is less than or equal to the preset lowest rotating speed.
If not, go to step 208; if yes, go to step 211.
208: and reducing the current rotating speed of the inner fan by a preset rotating speed change range to obtain the ith first rotating speed.
For example, the "preset rotation speed variation amplitude" may be a numerical value or a numerical range, and may be set according to an empirical value. Optionally, the preset rotation speed variation amplitude may be 50r/min (revolutions per minute) or the like. The magnitude of the preset rotational speed variation amplitude in any two times of executing the step 208 may be the same or different.
It should be noted that, when the control mode of the air conditioner is the cooling mode, the evaporating pressure can be reduced by reducing the rotation speed of the inner fan, so as to reduce the condensing pressure, and achieve the purpose of unloading the load of the air conditioner.
209: and acquiring the ith second value of the current of the whole air conditioner.
210: and judging whether the ith second value is larger than a preset current threshold value or not.
If yes, go to step 211; if not, go to step 212.
211: i is added by 1.
After step 211 is performed, step 206 is performed.
212: and stably operating according to the second value and the working frequency f of the compressor.
213: and after the air conditioner stably operates for a preset time, adjusting the current rotating speed of the inner fan to be the preset rotating speed.
After step 213 is performed, step 202 is performed.
For example, the "preset time" may be set empirically, and optionally, the preset time may be 15 min.
It should be noted that the "current rotation speed" in step 213 is the "current rotation speed" when step 206 is executed last time, and the "preset rotation speed" in step 213 is the preset rotation speed corresponding to the "operation state of the air conditioner" in step 203.
According to the method for controlling the air conditioner, when the control mode of the air conditioner is a refrigeration mode and is under an overload working condition, the rotating speed of an inner fan is reduced and a second value of the current of the whole air conditioner is obtained by obtaining a first value of the current of the whole air conditioner under the condition that the working frequency f of a compressor is unchanged when the first value is larger than a preset threshold; and when the second value is less than or equal to the preset threshold value, stably operating according to the second value and f. The scheme ensures that the preset index parameter does not exceed the preset threshold value, so that the service life of the air conditioner can be prolonged; meanwhile, the working frequency of the compressor is not changed, compared with the prior art, the air conditioner can provide increased cold quantity for a user in unit time, so that the change rate of the indoor temperature difference is increased, namely, the indoor temperature can be adjusted to the target temperature indicated by the user more quickly, and the experience effect of the user is improved.
Example 2
In this embodiment, the control mode of the air conditioner is a heating mode. As shown in fig. 3, the method includes:
301: the control mode of the air conditioner is determined as a heating mode.
302: and judging whether the ambient temperature of the air conditioner is greater than or equal to a second temperature threshold value.
If yes, indicating that the air conditioner is in an overload working condition, executing step 303; if not, the air conditioner is not in the overload working condition, and the operation is finished.
It should be noted that, in this embodiment, a specific value of the "second temperature threshold" is not limited, and may be determined according to factors such as a ventilation effect of an environment where the air conditioner is located. Alternatively, the first temperature threshold may be 24 ℃.
303: the method comprises the steps of obtaining a first value of the current of the whole air conditioner and the current rotating speed of an inner fan.
304: and judging whether the first value is larger than a preset current threshold value or not.
If yes, go to step 305; if not, the process is ended.
305: and carrying out the ith summation operation on the current rotating speed and the preset rotating speed variation amplitude.
Wherein i is more than or equal to 1, i is an integer, and the initial value of i is 1.
For example, when step 305 is executed for the 1 st time, if the preset rotation speed is a numerical value, the front rotation speed is generally the preset rotation speed corresponding to the operation state of the air conditioner when the "obtaining" action is executed in step 302; if the preset rotation speed is within a range of values, the current rotation speed is generally one of the preset rotation speeds corresponding to the operation state of the air conditioner when the "obtaining" action is performed in step 302. In the case of executing step 305 from 2 nd to n th times, the current rotation speed is the "second rotation speed" obtained in the previous execution of step 307.
306: and judging whether the value obtained by the ith summation operation is greater than or equal to the preset highest rotating speed.
If not, go to step 307; if yes, the process is ended.
307: and increasing the current rotating speed of the inner fan by a preset rotating speed change amplitude to obtain a second rotating speed.
For example, the "preset rotation speed variation amplitude" may be a numerical value or a numerical range, and may be set according to an empirical value. Optionally, the preset rotation speed variation amplitude may be 50r/min (revolutions per minute) or the like. The magnitude of the preset rotational speed variation amplitude in any two times of executing the step 208 may be the same or different.
It should be noted that, when the control mode of the air conditioner is the heating mode, the condensing pressure can be reduced by increasing the rotation speed of the inner fan, so as to achieve the purpose of unloading the load of the air conditioner.
308: and acquiring the ith second value of the current of the whole air conditioner.
309: and judging whether the ith second value is larger than a preset current threshold value or not.
If yes, go to step 310; if not, go to step 311.
310: i is added by 1.
After step 310 is performed, step 305 is performed.
311: and stably operating according to the second value and the working frequency f of the compressor.
312: and after the air conditioner stably operates for a preset time, adjusting the current rotating speed of the inner fan to be the preset rotating speed.
After step 312 is performed, it is ended.
For example, the "preset time" may be set empirically, and optionally, the preset time may be 15 min.
It should be noted that the "current rotation speed" in step 312 is the "current rotation speed" when step 306 is executed last time, and the "preset rotation speed" in step 312 is the preset rotation speed corresponding to the operation state of the air conditioner when step 303 is executed, where reference may be made to the above for the relevant explanation of the operation state of the air conditioner.
According to the method for controlling the air conditioner, when the control mode of the air conditioner is a heating mode and is in an overload working condition, the rotating speed of an inner fan is increased and a second value of the current of the whole air conditioner is obtained by obtaining a first value of the current of the whole air conditioner under the condition that the working frequency f of a compressor is unchanged when the first value is larger than a preset threshold; and when the second value is less than or equal to the preset threshold value, stably operating according to the second value and f. The scheme ensures that the preset index parameter does not exceed the preset threshold value, so that the service life of the air conditioner can be prolonged; meanwhile, the working frequency of the compressor is not changed, compared with the prior art, the heat quantity which can be provided for the user in unit time of the air conditioner is increased, so that the indoor temperature difference change rate is increased, namely, the indoor temperature can be adjusted to the target temperature indicated by the user more quickly, and the experience effect of the user is improved.
Example two
As shown in fig. 4, an apparatus 4 for controlling an air conditioner according to an embodiment of the present invention is configured to execute the method for controlling an air conditioner shown in fig. 1, where the air conditioner includes a compressor, and the operating frequency of the compressor is f, and the apparatus 4 includes:
the acquiring unit 41 is configured to acquire a first value of a preset index parameter of the air conditioner when the air conditioner is in an overload condition; the preset index parameters comprise the current of the whole machine and/or the change rate of the current of the whole machine;
an unloading unit 42, configured to unload the load of the air conditioner if the first value is greater than a preset threshold; wherein, in the process of unloading the load of the air conditioner, the working frequency of the compressor is f;
the obtaining unit 41 is further configured to obtain a second value of the index parameter after unloading the load of the air conditioner;
and a control unit 43, configured to control the air conditioner to stably operate according to the second value and the f when the second value is less than or equal to the preset threshold.
Optionally, the air conditioner further comprises an inner fan; the unloading unit 42 is specifically configured to unload the load of the air conditioner by adjusting the rotation speed of the internal fan.
Optionally, the unloading unit 42 is specifically configured to: when the control mode of the air conditioner is a refrigeration mode, reducing the rotating speed of the inner fan to obtain a first rotating speed; or when the control mode of the air conditioner is the heating mode, increasing the rotating speed of the inner fan to obtain a second rotating speed.
Optionally, the first rotation speed is greater than or equal to a preset minimum rotation speed; or the second rotating speed is less than or equal to the preset highest rotating speed.
Optionally, when the air conditioner operates stably, the rotation speed of the inner fan is r, the preset rotation speed of the inner fan is r0, as shown in fig. 5, the apparatus 4 further includes:
and the adjusting unit 44 is used for adjusting the rotating speed of the inner fan from r to r0 after the air conditioner stably runs for a preset time.
Optionally, as shown in fig. 5, the apparatus 4 further includes:
the determining unit 45 is configured to determine that the air conditioner is in an overload working condition when the ambient temperature of the air conditioner is greater than or equal to a first temperature threshold when the control mode of the air conditioner is the cooling mode; or when the control mode of the air conditioner is the heating mode and the ambient temperature of the air conditioner is greater than or equal to a second temperature threshold value, determining that the air conditioner is in an overload working condition.
Optionally, the unloading unit 42 is configured to adjust the rotation speed of the inner fan according to a preset rotation speed variation range.
The device for controlling the air conditioner provided by the embodiment obtains a first value of a preset index parameter of the air conditioner when the air conditioner is in an overload working condition, wherein the preset index parameter comprises the current of the whole air conditioner and/or the change rate of the current of the whole air conditioner; when the first value is larger than the preset threshold value, unloading the load of the air conditioner under the condition that the working frequency f of the compressor is not changed, and acquiring a second value of the index parameter; and when the second value is less than or equal to the preset threshold value, controlling the air conditioner to stably operate according to the second value and f. The scheme ensures that the preset index parameter does not exceed the preset threshold value, so that the service life of the air conditioner can be prolonged; meanwhile, the working frequency of the compressor is not changed, compared with the prior art, the air conditioner can provide heat or cold for a user in unit time, so that the indoor temperature difference change rate is increased, namely, the indoor temperature can be adjusted to the target temperature indicated by the user more quickly, and the experience effect of the user is improved.
EXAMPLE III
As shown in fig. 6, an apparatus 6 for controlling an air conditioner according to an embodiment of the present invention is configured to perform the method for controlling an air conditioner shown in fig. 1, where the air conditioner includes a compressor, and the operating frequency of the compressor is f, and the apparatus 6 includes: a memory 61 and a processor 62; wherein,
a memory 61 for storing a set of codes for controlling the processor 62 to perform the following actions: when the air conditioner is in an overload working condition, acquiring a first value of a preset index parameter of the air conditioner; the preset index parameters comprise the current of the whole machine and/or the change rate of the current of the whole machine;
if the first value is larger than a preset threshold value, unloading the load of the air conditioner; wherein, in the process of unloading the load of the air conditioner, the working frequency of the compressor is f;
after the load of the air conditioner is unloaded, acquiring a second value of the index parameter;
and when the second value is smaller than or equal to the preset threshold value, controlling the air conditioner to stably operate according to the second value and the f.
Optionally, the air conditioner further comprises an inner fan; the processor 62 is specifically configured to unload the air conditioner load by adjusting the speed of the internal fan.
Optionally, the processor 62 is specifically configured to: when the control mode of the air conditioner is a refrigeration mode, reducing the rotating speed of the inner fan to obtain a first rotating speed; or when the control mode of the air conditioner is the heating mode, increasing the rotating speed of the inner fan to obtain a second rotating speed.
Optionally, the first rotation speed is greater than or equal to a preset minimum rotation speed; or the second rotating speed is less than or equal to the preset highest rotating speed.
Optionally, when the air conditioner operates stably, the rotating speed of the inner fan is r, the preset rotating speed of the inner fan is r0, and the processor 62 is further configured to adjust the rotating speed of the inner fan to r0 after the air conditioner operates stably for a preset time.
Optionally, the processor 62 is further configured to determine that the air conditioner is in an overload condition when the ambient temperature of the air conditioner is greater than or equal to a first temperature threshold when the control mode of the air conditioner is the cooling mode; or when the control mode of the air conditioner is the heating mode and the ambient temperature of the air conditioner is greater than or equal to a second temperature threshold value, determining that the air conditioner is in an overload working condition.
Optionally, the processor 62 is specifically configured to adjust the rotation speed of the inner fan according to a preset rotation speed variation range.
The device for controlling the air conditioner provided by the embodiment obtains a first value of a preset index parameter of the air conditioner when the air conditioner is in an overload working condition, wherein the preset index parameter comprises the current of the whole air conditioner and/or the change rate of the current of the whole air conditioner; when the first value is larger than the preset threshold value, unloading the load of the air conditioner under the condition that the working frequency f of the compressor is not changed, and acquiring a second value of the index parameter; and when the second value is less than or equal to the preset threshold value, controlling the air conditioner to stably operate according to the second value and f. The scheme ensures that the preset index parameter does not exceed the preset threshold value, so that the service life of the air conditioner can be prolonged; meanwhile, the working frequency of the compressor is not changed, compared with the prior art, the air conditioner can provide heat or cold for a user in unit time, so that the indoor temperature difference change rate is increased, namely, the indoor temperature can be adjusted to the target temperature indicated by the user more quickly, and the experience effect of the user is improved.
In addition, as shown in fig. 7, an embodiment of the present invention further provides an air conditioner, including: a compressor, an internal fan and a device for controlling the air conditioner; the device for controlling the air conditioner may be any one of the devices 4 or 6 provided above.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (15)
1. A method of controlling an air conditioner, the air conditioner including a compressor having an operating frequency f, the method comprising:
when the air conditioner is in an overload working condition, acquiring a first value of a preset index parameter of the air conditioner; the preset index parameters comprise the current of the whole machine and/or the change rate of the current of the whole machine;
if the first value is larger than a preset threshold value, unloading the load of the air conditioner; wherein, in the process of unloading the load of the air conditioner, the working frequency of the compressor is f;
after the load of the air conditioner is unloaded, acquiring a second value of the index parameter;
and when the second value is smaller than or equal to the preset threshold value, controlling the air conditioner to stably operate according to the second value and the f.
2. The method of claim 1, wherein the air conditioner further comprises an internal fan; unloading the load of the air conditioner, comprising:
and unloading the load of the air conditioner by adjusting the rotating speed of the inner fan.
3. The method of claim 2, wherein the unloading the air conditioner by adjusting the speed of the internal fan comprises:
when the control mode of the air conditioner is a refrigeration mode, reducing the rotating speed of the inner fan to obtain a first rotating speed; or,
and when the control mode of the air conditioner is a heating mode, increasing the rotating speed of the inner fan to obtain a second rotating speed.
4. The method of claim 3, wherein the first rotational speed is greater than or equal to a preset minimum rotational speed; or the second rotating speed is less than or equal to the preset highest rotating speed.
5. The method as claimed in claim 2, wherein the rotation speed of the inner fan is r and the preset rotation speed of the inner fan is r0 when the air conditioner is in a steady operation, the method further comprising:
and after the air conditioner stably operates for a preset time, adjusting the rotating speed of the inner fan from r to r 0.
6. The method of claim 1, further comprising:
when the control mode of the air conditioner is a refrigeration mode, determining that the air conditioner is in an overload working condition when the ambient temperature of the air conditioner is greater than or equal to a first temperature threshold value; or,
when the control mode of the air conditioner is a heating mode, and when the ambient temperature of the air conditioner is greater than or equal to a second temperature threshold value, determining that the air conditioner is in an overload working condition.
7. The method of claim 2, wherein adjusting the rotational speed of the inner fan comprises:
and adjusting the rotating speed of the inner fan according to the preset rotating speed variation amplitude.
8. An apparatus for controlling an air conditioner, the air conditioner including a compressor having an operating frequency f, the apparatus comprising:
the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a first value of a preset index parameter of the air conditioner when the air conditioner is in an overload working condition; the preset index parameters comprise the current of the whole machine and/or the change rate of the current of the whole machine;
the unloading unit is used for unloading the load of the air conditioner if the first value is larger than a preset threshold value; wherein, in the process of unloading the load of the air conditioner, the working frequency of the compressor is f;
the obtaining unit is further used for obtaining a second value of the index parameter after the load of the air conditioner is unloaded;
and the control unit is used for controlling the air conditioner to stably operate according to the second value and the f when the second value is less than or equal to the preset threshold value.
9. The apparatus of claim 8, wherein the air conditioner further comprises an internal fan; the unloading unit is used for unloading the load of the air conditioner by adjusting the rotating speed of the inner fan.
10. The apparatus of claim 9, wherein the unloading unit is configured to: when the control mode of the air conditioner is a refrigeration mode, reducing the rotating speed of the inner fan to obtain a first rotating speed; or when the control mode of the air conditioner is the heating mode, increasing the rotating speed of the inner fan to obtain a second rotating speed.
11. The device of claim 10, wherein the first rotational speed is greater than or equal to a preset minimum rotational speed; or the second rotating speed is less than or equal to the preset highest rotating speed.
12. The apparatus as claimed in claim 9, wherein the rotation speed of the inner fan is r and the preset rotation speed of the inner fan is r0 when the air conditioner is in a steady operation, the apparatus further comprising:
and the adjusting unit is used for adjusting the rotating speed of the inner fan from r to r0 after the air conditioner operates stably for a preset time.
13. The apparatus of claim 8, further comprising:
the air conditioner control device comprises a determining unit, a judging unit and a control unit, wherein the determining unit is used for determining that the air conditioner is in an overload working condition when the control mode of the air conditioner is a refrigeration mode and the ambient temperature of the air conditioner is greater than or equal to a first temperature threshold; or when the control mode of the air conditioner is the heating mode and the ambient temperature of the air conditioner is greater than or equal to a second temperature threshold value, determining that the air conditioner is in an overload working condition.
14. The apparatus of claim 9, wherein the unloading unit is configured to adjust the rotation speed of the inner fan according to a preset rotation speed variation range.
15. An air conditioner, the air conditioner includes the compressor, its characterized in that still includes: the apparatus for controlling an air conditioner as claimed in any one of claims 8 to 14.
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| CN106196494A (en) * | 2016-08-01 | 2016-12-07 | 珠海格力电器股份有限公司 | Complete machine overload control method and device |
| CN106642530A (en) * | 2016-10-28 | 2017-05-10 | 广东美的制冷设备有限公司 | Control method and air conditioner |
| CN107144061A (en) * | 2017-06-20 | 2017-09-08 | 广东美的暖通设备有限公司 | Compressor cooling means, system and air-conditioning |
| CN108317666A (en) * | 2018-03-06 | 2018-07-24 | 广东美的制冷设备有限公司 | Defrosting control method, device, air conditioner and computer readable storage medium |
| WO2018176331A1 (en) * | 2017-03-30 | 2018-10-04 | 广东美的制冷设备有限公司 | Mobile air conditioner control method and device |
| CN108758965A (en) * | 2018-06-19 | 2018-11-06 | 宁波奥克斯电气股份有限公司 | A kind of overload protection control method, device and air-conditioning |
| CN108870682A (en) * | 2018-07-17 | 2018-11-23 | 奥克斯空调股份有限公司 | A kind of air conditioner load control method and device |
| CN111271847A (en) * | 2019-07-17 | 2020-06-12 | 宁波奥克斯电气股份有限公司 | Air conditioner control method for improving low-temperature heating capacity |
| CN112178879A (en) * | 2020-09-18 | 2021-01-05 | 青岛海尔空调器有限总公司 | Control method of air conditioner and air conditioner |
| CN114893884A (en) * | 2022-04-24 | 2022-08-12 | 宁波奥克斯电气股份有限公司 | Control method for refrigeration overload protection of fixed-frequency air conditioner and air conditioner |
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| CN114893884A (en) * | 2022-04-24 | 2022-08-12 | 宁波奥克斯电气股份有限公司 | Control method for refrigeration overload protection of fixed-frequency air conditioner and air conditioner |
| CN114893884B (en) * | 2022-04-24 | 2023-10-03 | 宁波奥克斯电气股份有限公司 | Control method for refrigerating overload protection of fixed-frequency air conditioner and air conditioner |
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