CN114322240A - Air conditioner control method and device and air conditioner - Google Patents
Air conditioner control method and device and air conditioner Download PDFInfo
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- CN114322240A CN114322240A CN202210004452.1A CN202210004452A CN114322240A CN 114322240 A CN114322240 A CN 114322240A CN 202210004452 A CN202210004452 A CN 202210004452A CN 114322240 A CN114322240 A CN 114322240A
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Abstract
The embodiment of the invention discloses an air conditioner control method, an air conditioner control device and an air conditioner, wherein the air conditioner control method is used for acquiring a first outdoor unit current value of the air conditioner at a first moment; acquiring a second outdoor unit current value of the air conditioner at a second moment, wherein the second moment is a moment after a preset time interval passes by the first moment; determining a first current change value according to the first outdoor machine current value and the second outdoor machine current value; and controlling the compressor to be closed under the condition that the first current change value is larger than a first current change threshold value. According to the embodiment of the invention, when the air conditioner has an abnormal fault, the compressor can be controlled to be closed in time by determining the current change of the outdoor unit, so that the shutdown protection of the compressor is realized.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner control method and device and an air conditioner.
Background
Currently, the abnormal protection of the air conditioner is determined by the magnitude of a detected current value, that is, when the detected current value is greater than a preset protection threshold value within a certain time, it is determined that the air conditioner has an abnormal fault, and the compressor is stopped to protect a core component of the air conditioner, namely, the compressor.
However, when abnormal faults such as short circuit of an outer fan occurs during refrigeration and short circuit of an inner fan occurs during heating, the current of the whole air conditioner is not very large, and the current cannot reach the preset protection threshold value. If the variable frequency air conditioner is under the high temperature refrigeration condition, the operating frequency is lower, and the electric current is not big, if the overheated trip of alternating current motor appears, the condensing pressure of compressor will rise rapidly, leads to the similar stifled commentaries on classics of compressor, and coil current increases rapidly, increases the coil demagnetization risk, nevertheless because the air conditioner complete machine electric current is less this moment, does not reach and predetermines the protection threshold value, uses the shutdown protection that traditional protection scheme just can't realize the compressor.
Disclosure of Invention
The invention mainly aims to provide an air conditioner control method, an air conditioner control device, an air conditioner and a computer readable storage medium, which can realize shutdown protection of a compressor.
In a first aspect, an embodiment of the present invention provides a compressor control method, where the method includes:
acquiring a first outdoor unit current value of the air conditioner at a first moment;
acquiring a second outdoor unit current value of the air conditioner at a second moment, wherein the second moment is a moment after a preset time interval passes by the first moment;
determining a first current change value according to the first outdoor machine current value and the second outdoor machine current value;
and controlling the compressor to be closed under the condition that the first current change value is larger than a first current change threshold value.
The air conditioner control method provided by the embodiment of the invention at least has the following beneficial technical effects:
the method and the device for controlling the compressor to be turned off in the air conditioner have the advantages that the first outdoor unit current value and the second outdoor unit current value of the air conditioner at the first moment and the second moment are obtained, the second moment is the moment after a preset time interval passes through the first moment, the first current change value is determined according to the first outdoor unit current value and the second outdoor unit current value, and the compressor is controlled to be turned off under the condition that the first current change value is larger than the first current change threshold value. According to the embodiment of the invention, when the air conditioner has an abnormal fault, the compressor can be controlled to be closed in time by determining the current change of the outdoor unit, so that the shutdown protection of the compressor is realized.
According to some embodiments of the present invention, after the obtaining of the second outdoor unit current value of the air conditioner at the second time, the method further comprises:
acquiring a third outdoor unit current value of the air conditioner at a third moment, wherein the third moment is a moment after a preset time interval passes through the second moment;
determining a second current change value according to the first outdoor machine current value and the third outdoor machine current value;
controlling the compressor to be closed under the condition that the second current change value is larger than a second current change threshold value; the second current change threshold is greater than the first current change threshold.
After a second outdoor unit current value of the air conditioner at a second moment is obtained, a third outdoor unit current value of the air conditioner at a third moment after a preset time interval passes at the second moment is obtained, a second current change value is determined according to the first outdoor unit current value and the third outdoor unit current value, and under the condition that the first current change value is smaller than or equal to a first current change threshold value, judgment is carried out based on the second current change value: and if the second current change value is larger than a second current change threshold value, controlling the compressor to be closed, wherein the third current change threshold value is larger than the second current change threshold value. The current value of the outdoor unit is obtained for multiple times by setting the preset time interval, and the current change is judged for multiple times, so that the abnormal fault of the air conditioner can be found more timely, and the compressor can be turned off timely.
According to some embodiments of the present invention, after the obtaining of the third outdoor unit current value of the air conditioner at the third time, the method further includes:
acquiring a fourth outdoor unit current value of the air conditioner at a fourth moment, wherein the fourth moment is a moment after a preset time interval passes through the third moment;
determining a third current variation value according to the first outdoor machine current value and the fourth outdoor machine current value;
controlling the compressor to be turned off when the third current variation value is greater than a third current variation threshold; the third current change threshold is greater than the second current change threshold.
After acquiring a third outdoor unit current value of the air conditioner at a third moment, acquiring a fourth outdoor unit current value of the air conditioner at a fourth moment after a preset time interval elapses at the third moment, determining a third current change value according to the first outdoor unit current value and the fourth outdoor unit current value, and under the condition that the second current change value is less than or equal to a second current change threshold, performing judgment based on the third current change value: and if the third current change value is larger than a third current change threshold value, controlling the compressor to be closed, wherein the third current change threshold value is larger than the second current change threshold value. The current value of the outdoor unit is obtained for multiple times by setting the preset time interval, and the current change is judged for multiple times, so that the abnormal fault of the air conditioner can be found more timely, and the compressor can be turned off timely.
According to the air conditioner control method of some embodiments of the present invention, in a case where an operating state of the air conditioner is in a preset state, the first current change threshold is a product of a first preset current change threshold and a preset weight coefficient, the second current change threshold is a product of a second preset current change threshold and the preset weight coefficient, the third current change threshold is a product of a third preset current change threshold and the preset weight coefficient, and the weight coefficient is a positive number smaller than 1;
and under the condition that the working state of the air conditioner is not in the preset state, the first current change threshold is the first preset current change threshold, the second current change threshold is the second preset current change threshold, and the third current change threshold is the third preset current change threshold.
When the working state of the air conditioner is in the preset state, the change amplitude of the outdoor unit current value is smaller than the change amplitude when the outdoor unit current value is not in the preset state. Therefore, when the working state of the air conditioner is in a preset state, the current change threshold serving as a judgment reference of shutdown protection needs to be reduced, so that shutdown protection can be performed on the compressor in time. And obtaining the current change threshold value by multiplying the preset current change threshold value by the preset weight. Wherein the preset weight coefficient is a positive number smaller than 1. When the working state of the air conditioner is not in the preset state, the preset current change threshold is the current change threshold.
By determining whether the air conditioner is in a preset state or not, and adjusting a current change threshold serving as a judgment reference of shutdown protection based on the change amplitude of the outdoor unit current value in the preset state, effective shutdown protection of the compressor can be realized when the air conditioner is in different working states.
According to some embodiments of the air conditioner control method of the present invention, the preset state includes at least one of an exhaust limiting state and a current limiting state.
When the working state of the air conditioner is in the exhaust frequency limiting state or the current frequency limiting state, the change amplitude of the outdoor unit current value is smaller than the change amplitude when the outdoor unit current value is not in the exhaust frequency limiting state or the current frequency limiting state.
According to some embodiments of the present invention, the method for controlling an air conditioner, wherein the obtaining a first outdoor unit current value of the air conditioner at a first time includes:
and acquiring a first outdoor unit current value of the air conditioner at a first moment after the compressor operates for a preset working time.
The compressor is unstable in working current value at the beginning, and the first outdoor unit current value of the air conditioner at the first moment is obtained after the compressor runs for the preset working time, so that the condition that the compressor is turned off due to outdoor unit current change during early starting of the air conditioner can be avoided.
According to some embodiments of the present invention, the method further comprises:
and displaying fault information under the condition that the first current change value is larger than a first current change threshold value.
According to some embodiments of the present invention, the method further comprises:
and controlling the compressor to restart after the compressor is closed for a preset restart time.
In a second aspect, an embodiment of the present invention further provides an air conditioner control device, where the device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the air conditioner control method according to any one of the embodiments of the first aspect of the present invention is implemented.
The air conditioner control device provided by the embodiment of the invention at least has the following beneficial technical effects:
the method and the device for controlling the compressor to be turned off in the air conditioner have the advantages that the first outdoor unit current value and the second outdoor unit current value of the air conditioner at the first moment and the second moment are obtained, the second moment is the moment after a preset time interval passes through the first moment, the first current change value is determined according to the first outdoor unit current value and the second outdoor unit current value, and the compressor is controlled to be turned off under the condition that the first current change value is larger than the first current change threshold value. According to the embodiment of the invention, when the air conditioner has an abnormal fault, the compressor can be controlled to be closed in time by determining the current change of the outdoor unit, so that the shutdown protection of the compressor is realized.
In a third aspect, an embodiment of the present invention further provides an air conditioner, where the air conditioner includes
A compressor; and an air conditioner control device according to any one of the embodiments of the second aspect of the embodiment of the present invention.
The air conditioner provided by the embodiment of the invention at least has the following beneficial technical effects:
the method and the device for controlling the compressor to be turned off in the air conditioner have the advantages that the first outdoor unit current value and the second outdoor unit current value of the air conditioner at the first moment and the second moment are obtained, the second moment is the moment after a preset time interval passes through the first moment, the first current change value is determined according to the first outdoor unit current value and the second outdoor unit current value, and the compressor is controlled to be turned off under the condition that the first current change value is larger than the first current change threshold value. According to the embodiment of the invention, when the air conditioner has an abnormal fault, the compressor can be controlled to be closed in time by determining the current change of the outdoor unit, so that the shutdown protection of the compressor is realized.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements an air conditioner control method according to any one of the embodiments of the first aspect of the present invention.
The computer-readable storage medium of the embodiment of the invention has at least the following beneficial technical effects:
the method and the device for controlling the compressor to be turned off in the air conditioner have the advantages that the first outdoor unit current value and the second outdoor unit current value of the air conditioner at the first moment and the second moment are obtained, the second moment is the moment after a preset time interval passes through the first moment, the first current change value is determined according to the first outdoor unit current value and the second outdoor unit current value, and the compressor is controlled to be turned off under the condition that the first current change value is larger than the first current change threshold value. According to the embodiment of the invention, when the air conditioner has an abnormal fault, the compressor can be controlled to be closed in time by determining the current change of the outdoor unit, so that the shutdown protection of the compressor is realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
Fig. 1 is a flowchart illustrating an air conditioner control method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating an air conditioner control method according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating an air conditioner control method according to an embodiment of the present invention;
fig. 4 is a system architecture diagram of an air conditioner control device according to an embodiment of the present invention;
fig. 5 is a system architecture diagram of an air conditioner according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be understood that in the description of the embodiments of the present invention, if there is any description of "first", "second", etc., it is only for the purpose of distinguishing technical features, and it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features. "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and may mean that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c may represent: a, b, c, a and b, a and c, b and c or a and b and c, wherein a, b and c can be single or multiple.
It should be noted that the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Currently, the abnormal protection of the air conditioner is determined by the magnitude of a detected current value, that is, when the detected current value is greater than a preset protection threshold value within a certain time, it is determined that the air conditioner has an abnormal fault, and the compressor is stopped to protect a core component of the air conditioner, namely, the compressor.
However, when abnormal faults such as short circuit of an outer fan occurs during refrigeration and short circuit of an inner fan occurs during heating, the current of the whole air conditioner is not very large, and the current cannot reach the preset protection threshold value. For example, when the constant-frequency air conditioner is used for high-temperature refrigeration, the current value of the whole machine is not high, if an external fan fails, the condensation pressure of the compressor rises linearly, and the power current of the constant-frequency air conditioner rises quickly in a short time. If the variable frequency air conditioner is in a high-temperature refrigeration condition, the working frequency is low, the current is not large, if the alternating current motor is overheated to trip, the condensation pressure of the compressor is rapidly increased, the compressor is similar to locked rotor, the coil current is rapidly increased, and the risk of demagnetization of the coil is increased.
Based on this, the embodiment of the invention provides an air conditioner control method, an air conditioner control device, an air conditioner and a computer readable storage medium, which can realize shutdown protection of a compressor.
Referring to fig. 1, fig. 1 is a flowchart illustrating an air conditioner control method according to an embodiment of the present invention. As shown in fig. 1, the air conditioner control method provided by the embodiment of the present invention includes, but is not limited to, steps S110 to S140.
Step S110: the method comprises the steps of obtaining a first outdoor unit current value of the air conditioner at a first moment.
Illustratively, the outdoor unit current is detected by a current transformer, and a first outdoor unit current value I of the air conditioner is obtained at a first time t1t1。
In some embodiments, step S110 in the air conditioner control method provided by the present invention may further include:
after the compressor operates for the preset working time, acquiring a first outdoor unit current value of the air conditioner at a first moment.
It can be understood that the current value is unstable when the compressor starts to work, and the current value of the first outdoor unit of the air conditioner is obtained after the preset working time, so that the condition that the compressor is turned off due to the current change of the outdoor unit when the air conditioner is started in the early stage can be avoided.
For example, the air conditioner may be obtained after the compressor is operated for 10 minutesCurrent value I of first outdoor unitt1. It should be understood that the preset working time can be adjusted according to the actual application, for example, the preset working time is 15 minutes or 20 minutes.
Step S120: and acquiring a second outdoor unit current value of the air conditioner at a second moment, wherein the second moment is the moment after a preset time interval passes from the first moment.
And acquiring a current value of a second outdoor unit of the air conditioner at a second moment after a preset time interval passes from the first moment.
For example, by setting the predetermined time interval, if the predetermined time interval is set to 10 seconds, the second outdoor unit current value I of the air conditioner is obtained at a second time t2 after 10 seconds have elapsed from the first time t1t2. It is understood that the preset time can be adjusted according to practical applications, and is not limited herein.
Step S130: and determining a first current change value according to the first outdoor machine current value and the second outdoor machine current value.
After a first outdoor unit current value of the air conditioner is obtained at a first moment and a second outdoor unit current value of the air conditioner is obtained at a second moment, a difference value between the first outdoor unit current value and the second outdoor unit current value is calculated, and a first current change value of the outdoor unit of the air conditioner from the first moment to the second moment can be determined.
Illustratively, the air conditioner has a first outdoor unit current value I at a first time t1t1The second outdoor unit current value I of 9A at the second time t2t210A, wherein the second time t2 is the first time t1 after 1 second. By calculating the current value I of the first outdoor unitt1And a second outdoor machine current value It2Obtaining a first current variation value of the outdoor unit from a first time t1 to a second time t 2: (I)t2-It1) I.e., the outdoor unit current increased by 1A within 1 second.
Illustratively, the air conditioner has a first outdoor unit current value I at a first time t1t1The second outdoor unit current value I of 10A at the second time t2t212A, wherein the second time t2 is the first time t1A time after 10 seconds. By calculating the current value I of the first outdoor unitt1And a second outdoor machine current value It2Obtaining a first current variation value of the outdoor unit from a first time t1 to a second time t 2: (I)t2-It1) 2A, that is, the outdoor unit current increases by 2A within 10 seconds.
Illustratively, the air conditioner has a first outdoor unit current value I at a first time t1t1The second outdoor unit current value I at the second time t2 is 12At215A, wherein the second time t2 is the first time t1 after 20 seconds. By calculating the current value I of the first outdoor unitt1And a second outdoor machine current value It2Obtaining a first current variation value of the outdoor unit from a first time t1 to a second time t 2: (I)t2-It1) I.e., the outdoor unit current increased by 3A within 20 seconds.
Step S140: and controlling the compressor to be closed under the condition that the first current change value is larger than the first current change threshold value.
It can be understood that, after obtaining a first current change value of the outdoor unit of the air conditioner from a first time to a second time according to a first outdoor current value and a second outdoor current value of the air conditioner, the first current change value is determined based on a first current change threshold value: and if the first current change value is larger than the first current change threshold value, judging that the air conditioner has an abnormal fault and controlling the compressor to be closed.
Illustratively, the second time t2 is a time after 1 second passes from the first time t1, when the first current variation value is 1A, that is, the outdoor unit current increases by 1A in 1 second, and the first current variation threshold I is setset1Is 0.2A, the first current change value is larger than the first current change threshold value (1A is larger than 0.2A), and the compressor is controlled to be closed.
Illustratively, the second time t2 is a time after 10 seconds have passed from the first time t1, when the first current variation value is 2A, that is, the outdoor unit current increases by 2A within 10 seconds, and the first current variation threshold I is setset1Is 1.2A, the first current variation value is greater than the first current variation threshold value (2A > 1.2A), and the compressor is controlledAnd closing.
Illustratively, the second time t2 is a time after 20 seconds have passed from the first time t1, when the first current variation value is 3A, that is, the outdoor unit current increases by 3A within 20 seconds, and the first current variation threshold I is setset1And 2A, the first current change value is larger than a first current change threshold value (3A is larger than 2A), and the compressor is controlled to be closed.
It should be understood that the first current variation threshold may be adjusted according to actual products and applications, and is not limited herein.
In some embodiments, the air conditioner control method provided in the embodiments of the present invention further includes: under the condition that the working state of the air conditioner is in a preset state, the first current change threshold is the product of a first preset current change threshold and a preset weight coefficient; and under the condition that the working state of the air conditioner is not in the preset state, the first current change threshold is the first preset current change threshold.
It can be understood that, when the working state of the air conditioner is in the preset state, the variation amplitude of the outdoor unit current value is smaller than that when the outdoor unit current value is not in the preset state. Therefore, when the working state of the air conditioner is in a preset state, the first current change threshold serving as a judgment reference of shutdown protection needs to be reduced, so that shutdown protection can be performed on the compressor in time. And obtaining the first current change threshold value by multiplying the first preset current change threshold value by the preset weight. Wherein the preset weight coefficient is a positive number smaller than 1, such as 0.8, 0.6 or 0.4; when the working state of the air conditioner is not in the preset state, the first current change threshold is the first preset current change threshold.
Illustratively, the first preset current change threshold is 0.2A, and the preset weighting factor is 0.8. Under the condition that the working state of the air conditioner is in a preset state, the first current change threshold Iset1Is the product of a first predetermined current variation threshold and a predetermined weight coefficient, i.e. a first current variation threshold Iset1＝0.2A×0.8＝0.16A。
By determining whether the air conditioner is in a preset state or not, and adjusting a first current change threshold value serving as a stop protection judgment reference based on the change amplitude of the outdoor unit current value in the preset state, effective stop protection of the compressor can be realized when the air conditioner is in different working states.
In some embodiments, the preset state may be at least one of an exhaust limiting state and a current limiting state.
When the working state of the air conditioner is in the exhaust frequency limiting state or the current frequency limiting state, the change amplitude of the outdoor unit current value is smaller than the change amplitude when the outdoor unit current value is not in the exhaust frequency limiting state or the current frequency limiting state.
In some embodiments, the air conditioner control method provided by the present invention further comprises:
and displaying fault information under the condition that the first current change value is larger than the first current change threshold value.
For example, the watch failure information may be displayed through a nixie tube or a display screen of the air conditioner, and the display of the failure information may be automatically canceled after 30 seconds or 60 seconds.
Referring to fig. 2, in some embodiments, the air conditioner control method according to the embodiments of the present invention further includes steps S210 to S230 after step S120.
Step S210: and acquiring a third outdoor unit current value of the air conditioner at a third moment, wherein the third moment is a moment after a preset time interval passes through the second moment.
And acquiring a third outdoor unit current value of the air conditioner at a third moment after a preset time interval passes at the second moment.
For example, by setting the preset time interval, if the preset time interval is set to 12 seconds, the third outdoor unit current value I of the air conditioner is obtained at the third time t3 after 12 seconds have elapsed from the second time t2t3. It is understood that the preset time can be adjusted according to practical applications, and is not limited herein.
Step S220: and determining a second current change value according to the first outdoor unit current value and the third outdoor unit current value.
After the first outdoor unit current value of the air conditioner is obtained at the first moment and the third outdoor unit current value of the air conditioner is obtained at the third moment, the difference value of the first outdoor unit current value and the third outdoor unit current value is calculated, and a second current change value of the outdoor unit of the air conditioner from the first moment to the third moment can be determined.
Illustratively, the air conditioner has a first outdoor unit current value I at a first time t1t1A third outdoor unit current value I of 9A at a third time t3t310A, calculating the current value I of the first outdoor unitt1And third outdoor machine current value It3Obtaining a second current variation value of the outdoor unit from the first time t1 to the third time t 3: (I)t3-It1)＝1A。
Step S230: controlling the compressor to be closed under the condition that the second current change value is larger than a second current change threshold value; the second current change threshold is greater than the first current change threshold.
It can be understood that, after obtaining a second current variation value of the outdoor unit of the air conditioner from the first time to the third time according to the first outdoor current value and the third outdoor current value of the air conditioner, the second current variation value is determined based on a second current variation threshold value: and if the second current change value is larger than the second current change threshold value, judging that the air conditioner has an abnormal fault and controlling the compressor to be closed.
It can be understood that, after obtaining the second outdoor unit current value of the air conditioner at the second time, obtaining a third outdoor unit current value of the air conditioner at a third time after a preset time interval elapses at the second time, determining a second current variation value according to the first outdoor unit current value and the third outdoor unit current value, and in a case that the first current variation value is less than or equal to the first current variation threshold, performing a determination based on the second current variation value: if the second current change value is larger than the second current change threshold value, controlling the compressor to be closed; wherein the third current change threshold is greater than the second current change threshold.
It should be understood that the second current variation threshold may be adjusted according to actual products and applications, and is not limited herein.
Exemplarily, the first outdoor unit current value It1A third outdoor machine current value I of 14At317A, a second current variation threshold Iset2Is 1.2A, according to the current value I of the first outdoor unitt1And third outdoor machine current value It3Determining a second current variation value: i ist3-It13A, in the case where the first current change value does not exceed the first current change threshold value, based on the second current change threshold value Iset2And (4) judging: the second current variation value is larger than a second current variation threshold value (I)t3-It1＝3A＞Iset21.2A), the compressor is controlled to shut down.
And under the condition that the first current change value does not exceed the first current change threshold, determining a second current change value according to the first outdoor machine current value and the third outdoor machine current value by using the third outdoor machine current value obtained at the third moment, and controlling the compressor to be closed under the condition that the second current change value is greater than the second current change threshold. The current value of the outdoor unit is obtained for multiple times by setting the preset time interval, and the current change is judged for multiple times, so that the abnormal fault of the air conditioner can be found more timely, and the compressor can be turned off timely.
In some embodiments, the air conditioner control method provided in the embodiments of the present invention further includes: under the condition that the working state of the air conditioner is in a preset state, the second current change threshold value is the product of the second preset current change threshold value and a preset weight coefficient; and under the condition that the working state of the air conditioner is not in the preset state, the second current change threshold is a second preset current change threshold.
It can be understood that, when the working state of the air conditioner is in the preset state, the variation amplitude of the outdoor unit current value is smaller than that when the outdoor unit current value is not in the preset state. Therefore, when the working state of the air conditioner is in a preset state, the second current change threshold value serving as the judgment reference of the shutdown protection needs to be reduced, so that the shutdown protection can be performed on the compressor in time. Wherein the preset weight coefficient is a positive number smaller than 1, such as 0.8, 0.6 or 0.4; and when the working state of the air conditioner is not in the preset state, the second current change threshold is the second preset current change threshold.
By determining whether the air conditioner is in a preset state or not, and adjusting a second current change threshold value serving as a stop protection judgment reference based on the change amplitude of the outdoor unit current value in the preset state, effective stop protection of the compressor can be realized when the air conditioner is in different working states.
In some embodiments, the preset state may be at least one of an exhaust limiting state and a current limiting state.
When the working state of the air conditioner is in the exhaust frequency limiting state or the current frequency limiting state, the change amplitude of the outdoor unit current value is smaller than the change amplitude when the outdoor unit current value is not in the exhaust frequency limiting state or the current frequency limiting state.
In some embodiments, the air conditioner control method provided by the present invention further comprises:
and displaying fault information under the condition that the second current change value is larger than a second current change threshold value.
For example, the watch failure information may be displayed through a nixie tube or a display screen of the air conditioner, and the display of the failure information may be automatically canceled after 30 seconds or 60 seconds.
Referring to fig. 3, in some embodiments, the air conditioner control method according to the embodiments of the present invention further includes steps S310 to S330 after step S210.
Step S310: and acquiring a fourth outdoor unit current value of the air conditioner at a fourth moment, wherein the fourth moment is a moment after a preset time interval passes through the third moment.
And acquiring a fourth outdoor unit current value of the air conditioner at a fourth moment after a preset time interval passes at the third moment.
For example, by setting the predetermined time interval, if the predetermined time interval is set to 12 seconds, the fourth outdoor unit current value I of the air conditioner is obtained at the fourth time t4 after 12 seconds have elapsed from the third time t3t4. It is understood that the preset time can be adjusted according to practical applications, and is not limited herein.
Step S320: and determining a third current change value according to the first outdoor machine current value and the fourth outdoor machine current value.
After the first outdoor unit current value of the air conditioner is obtained at the first moment and the fourth outdoor unit current value of the air conditioner is obtained at the fourth moment, the difference value of the first outdoor unit current value and the fourth outdoor unit current value is calculated, and the third current change value of the outdoor unit of the air conditioner from the first moment to the fourth moment can be determined.
Illustratively, the air conditioner has a first outdoor unit current value I at a first time t1t1The fourth outdoor unit current value I of 9A at fourth time t4t410A, calculating the current value I of the first outdoor unitt1And fourth outdoor machine current value It4Obtaining a third current variation value of the outdoor unit from the first time t1 to the fourth time t 4: (I)t4-It1)＝1A。
Step S330: controlling the compressor to be closed under the condition that the third current change value is larger than a third current change threshold value; the third current change threshold is greater than the second current change threshold.
It can be understood that, after obtaining a third current variation value of the outdoor unit of the air conditioner from the first time to the fourth time according to the first outdoor current value and the fourth outdoor current value of the air conditioner, the third current variation value is determined based on a third current variation threshold value: and if the third current change value is larger than the third current change threshold value, judging that the air conditioner has an abnormal fault and controlling the compressor to be closed.
It can be understood that, after obtaining the third outdoor unit current value of the air conditioner at the third time, obtaining a fourth outdoor unit current value of the air conditioner at a fourth time after a preset time interval elapses at the third time, and determining a third current variation value according to the first outdoor unit current value and the fourth outdoor unit current value, where the second current variation value is less than or equal to the second current variation threshold, based on the third current variation value: and if the third current change value is larger than a preset third current change threshold value, controlling the compressor to be closed, wherein the third current change threshold value is larger than the second current change threshold value.
It should be understood that the third current variation threshold may be adjusted according to actual products and applications, and is not limited herein.
Exemplarily, the first outdoor unit current value It1A fourth outdoor unit current value I of 14At417A, third current variation threshold Iset3Is 2A according to the current value I of the first outdoor unitt1And fourth outdoor machine current value It4Determining a third current variation value: i ist4-It13A, in the case where the second current change value does not exceed the second current change threshold value, based on the third current change threshold value Iset3And (4) judging: the third current variation value is greater than a third current variation threshold value (I)t4-It1＝3A＞Iset32A), the compressor is controlled to be off.
And under the condition that the first current change value does not exceed the first current change threshold value and the second current change does not exceed the second current change threshold value, determining a third current change value according to the first outdoor machine current value and the fourth outdoor machine current value by using a fourth outdoor machine current value obtained at a fourth moment, and under the condition that the third current change value is greater than the third current change threshold value, controlling the compressor to be closed. The current value of the outdoor unit is obtained for multiple times by setting the preset time interval, and the current change is judged for multiple times, so that the abnormal fault of the air conditioner can be found more timely, and the compressor can be turned off timely.
In some embodiments, the air conditioner control method provided in the embodiments of the present invention further includes: under the condition that the working state of the air conditioner is in a preset state, the third current change threshold value is the product of the third preset current change threshold value and a preset weight coefficient; and under the condition that the working state of the air conditioner is not in the preset state, the third current change threshold is a third preset current change threshold.
It can be understood that, when the working state of the air conditioner is in the preset state, the variation amplitude of the outdoor unit current value is smaller than that when the outdoor unit current value is not in the preset state. Therefore, when the working state of the air conditioner is in a preset state, the third current change threshold serving as the judgment reference of the shutdown protection needs to be reduced, so that the shutdown protection can be performed on the compressor in time. Wherein the preset weight coefficient is a positive number smaller than 1, such as 0.8, 0.6 or 0.4; and when the working state of the air conditioner is not in the preset state, the third current change threshold is the third preset current change threshold.
By determining whether the air conditioner is in a preset state or not, and adjusting a third current change threshold value serving as a stop protection judgment reference based on the change amplitude of the outdoor unit current value in the preset state, effective stop protection of the compressor can be realized when the air conditioner is in different working states.
In some embodiments, the preset state may be at least one of an exhaust limiting state and a current limiting state.
When the working state of the air conditioner is in the exhaust frequency limiting state or the current frequency limiting state, the change amplitude of the outdoor unit current value is smaller than the change amplitude when the outdoor unit current value is not in the exhaust frequency limiting state or the current frequency limiting state.
In some embodiments, the air conditioner control method provided by the present invention further comprises:
and displaying fault information under the condition that the third current change value is larger than the third current change threshold value.
For example, the watch failure information may be displayed through a nixie tube or a display screen of the air conditioner, and the display of the failure information may be automatically canceled after 30 seconds or 60 seconds.
In some embodiments, the air conditioner control method provided by the present invention further comprises:
and controlling the compressor to restart after the compressor is closed for a preset restart time.
It is understood that the compressor may be controlled to restart again after controlling the compressor to be turned off for a preset restart time.
In a specific embodiment, the method may further include, if the operation mode of the air conditioner is a cooling mode, controlling the compressor to restart after the compressor is turned off for a first preset restart time; and if the operation mode of the air conditioner is the heating mode, controlling the compressor to restart after the compressor is closed for a second preset restart time. The second preset restart time is greater than the first preset restart time, for example, the first preset restart time may be 2 minutes, and the first preset restart time may be 3 minutes.
Illustratively, the operation mode of the air conditioner is a refrigeration mode, and the compressor is controlled to be restarted after the compressor is shut down for 2 minutes; also, for example, the operation mode of the air conditioner is a heating mode, and the compressor is controlled to be restarted after the compressor is turned off for 3 minutes.
It is understood that the preset restart time may be determined according to actual products and application conditions, and is not limited herein.
In one possible implementation manner, after the first outdoor unit current value of the air conditioner is obtained, the second outdoor unit current value, the third outdoor unit current value, the fourth outdoor unit current value, and the like of the air conditioner are obtained at different preset time intervals. For example, after obtaining the first outdoor unit current value of the air conditioner for 1 second, obtaining a second outdoor unit current value of the air conditioner; acquiring a current value of a third outdoor unit of the air conditioner after acquiring a current value of the second outdoor unit of the air conditioner for 9 seconds; and acquiring a fourth outdoor unit current value of the air conditioner 11 seconds after acquiring the third outdoor unit current value of the air conditioner.
In another possible implementation manner, after the first outdoor unit current value of the air conditioner is obtained, a second outdoor unit current value, a third outdoor unit current value, a fourth outdoor unit current value, and the like of the air conditioner are obtained at the same preset time interval. For example, after the first outdoor unit current value of the air conditioner is obtained, the second outdoor unit current value, the third outdoor unit current value and the fourth outdoor unit current value of the air conditioner are respectively obtained at preset time intervals of 10 seconds.
It should be understood that the time interval for obtaining the outdoor unit current value and the number of times for obtaining the outdoor unit current value may be adjusted according to actual products and application situations, and this is not particularly limited in the embodiment of the present invention.
In one possible implementation, the first current variation threshold, the second current variation threshold, and the third current variation threshold are sequentially increased. For example, the first current change threshold is 0.3A, the second current change threshold is 1.4A, and the third current change threshold is 2.2A.
In another possible implementation, the first current change threshold, the second current change threshold, and the third current change threshold are the same, for example, the first current change threshold, the second current change threshold, and the third current change threshold are all 1.4A.
It should be understood that one or more current variation thresholds are set according to the number of times the outdoor unit current value is obtained. If there are multiple current change thresholds, the multiple current change thresholds may be gradually increased or the same, and the specific value may be determined according to the actual application. For example, when the time at which the first outdoor unit current value is obtained is taken as time 0 in seconds, the second outdoor unit current value, the third outdoor unit current value, and the fourth outdoor unit current value are obtained at time 1, time 10, and time 20, respectively, and three current change thresholds and corresponding values are set correspondingly: the first current variation threshold is 0.2A, the second current variation threshold is 1.2A, and the third current variation threshold is 2A, that is, after the first current variation value is obtained at time 0, if the current increase of the outdoor unit per second is greater than 0.2A, the current increase per 10 seconds is greater than 1.2, or the current increase per 20 seconds is greater than 2A, the compressor is controlled to be turned off.
The method and the device for controlling the compressor to be turned off in the air conditioner have the advantages that the first outdoor unit current value and the second outdoor unit current value of the air conditioner at the first moment and the second moment are obtained, the second moment is the moment after a preset time interval passes through the first moment, the first current change value is determined according to the first outdoor unit current value and the second outdoor unit current value, and the compressor is controlled to be turned off under the condition that the first current change value is larger than the first current change threshold value. According to the embodiment of the invention, when the air conditioner has an abnormal fault, the compressor can be controlled to be closed in time by determining the current change of the outdoor unit, so that the shutdown protection of the compressor is realized.
Referring to fig. 4, fig. 4 is a system architecture diagram of an air conditioner control device according to an embodiment of the present invention. As shown in fig. 4, an air conditioner control device 100 according to an embodiment of the present invention includes, but is not limited to:
a memory 120 for storing programs;
and a processor 110 for executing the program stored in the memory 120, wherein when the processor 110 executes the program stored in the memory 120, the processor 110 is configured to perform the above-mentioned air conditioner control method.
The processor 110 and the memory 120 may be connected by a bus or other means.
The memory 120, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs and non-transitory computer-executable programs, such as the air conditioner control method described in any embodiment of the present invention. The processor 110 implements the air conditioner control method described above by running non-transitory software programs and instructions stored in the memory 120.
The memory 120 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store and execute the air conditioner control method described above. Further, the memory 120 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 120 optionally includes memory located remotely from the processor 110, and these remote memories may be connected to the processor 110 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
Non-transitory software programs and instructions required to implement the air conditioner control method described above are stored in the memory 120 and, when executed by the one or more processors 110, perform the air conditioner control method described in any embodiment of the present invention.
Referring to fig. 5, fig. 5 is a system architecture diagram of an air conditioner according to an embodiment of the present invention. As shown in fig. 5, an air conditioner 200 according to an embodiment of the present invention includes, but is not limited to:
a compressor 210; and an air conditioner control device 100 as described in any of the embodiments of the present invention.
Embodiments of the present invention also provide a computer-readable storage medium storing computer-executable instructions, which are executed by one or more control processors, so that the one or more processors execute the air conditioner control method described in any embodiment of the present invention, for example, execute the above-described method steps S110 to S140 in fig. 1, method steps S210 to S230 in fig. 2, and method steps S310 to S330 in fig. 3.
The above-described embodiments of the apparatus are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may also be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (11)
1. An air conditioner control method, characterized in that the method comprises:
acquiring a first outdoor unit current value of the air conditioner at a first moment;
acquiring a second outdoor unit current value of the air conditioner at a second moment, wherein the second moment is a moment after a preset time interval passes by the first moment;
determining a first current change value according to the first outdoor machine current value and the second outdoor machine current value;
and controlling the compressor to be closed under the condition that the first current change value is larger than a first current change threshold value.
2. The method of claim 1, wherein after the obtaining of the second outdoor unit current value of the air conditioner at the second time, the method further comprises:
acquiring a third outdoor unit current value of the air conditioner at a third moment, wherein the third moment is a moment after a preset time interval passes through the second moment;
determining a second current change value according to the first outdoor machine current value and the third outdoor machine current value;
controlling the compressor to be closed under the condition that the second current change value is larger than a second current change threshold value; the second current change threshold is greater than the first current change threshold.
3. The method of claim 2, wherein after the obtaining of the third outdoor unit current value of the air conditioner at the third time, the method further comprises:
acquiring a fourth outdoor unit current value of the air conditioner at a fourth moment, wherein the fourth moment is a moment after a preset time interval passes through the third moment;
determining a third current variation value according to the first outdoor machine current value and the fourth outdoor machine current value;
controlling the compressor to be turned off when the third current variation value is greater than a third current variation threshold; the third current change threshold is greater than the second current change threshold.
4. The method according to claim 3, wherein, in a case where the operation state of the air conditioner is in a preset state, the first current change threshold is a product of a first preset current change threshold and a preset weight coefficient, the second current change threshold is a product of a second preset current change threshold and the preset weight coefficient, the third current change threshold is a product of a third preset current change threshold and the preset weight coefficient, and the weight coefficient is a positive number less than 1;
and under the condition that the working state of the air conditioner is not in the preset state, the first current change threshold is the first preset current change threshold, the second current change threshold is the second preset current change threshold, and the third current change threshold is the third preset current change threshold.
5. The method of claim 4, wherein the predetermined state comprises at least one of an exhaust limiting state and a current limiting state.
6. The method of claim 1, wherein the obtaining the first outdoor unit current value of the air conditioner at the first time comprises:
and acquiring a first outdoor unit current value of the air conditioner at a first moment after the compressor operates for a preset working time.
7. The method of claim 1, further comprising:
and displaying fault information under the condition that the first current change value is larger than a first current change threshold value.
8. The method of claim 1, further comprising:
and controlling the compressor to restart after the compressor is closed for a preset restart time.
9. An air conditioner control device, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the air conditioner control method according to any one of claims 1 to 8 when executing the computer program.
10. An air conditioner, comprising:
a compressor; and
the air conditioner control device according to claim 9.
11. A computer-readable storage medium, characterized in that a computer program is stored, which when executed by a processor, implements the air conditioner control method according to any one of claims 1 to 8.
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