CN117948681A - Air conditioner and frequency limiting control method, device, equipment and medium of compressor of air conditioner - Google Patents
Air conditioner and frequency limiting control method, device, equipment and medium of compressor of air conditioner Download PDFInfo
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Abstract
The invention relates to the technical field of air conditioners, in particular to a frequency limiting control method of an air conditioner compressor, which aims to solve the problem of how to reliably and low-cost improve the refrigerating effect of the air conditioner compressor when the refrigerating effect is reduced due to frequency reduction of the air conditioner compressor. For this purpose, the frequency limiting control method of the air conditioner compressor provided by the invention comprises the following steps: after detecting that the outdoor environment temperature is greater than a preset temperature threshold and the operating frequency of the air conditioner compressor is less than a preset frequency threshold, acquiring the temperature difference between the actual temperature and the target temperature of the indoor environment temperature and the temperature difference change rate of the temperature difference, and selectively adjusting the set frequency limiting value of the air conditioner compressor according to the comparison result of the temperature difference and the preset temperature difference threshold and/or the comparison result of the temperature difference change rate and the preset change rate threshold. According to the invention, the set frequency limiting value of the air conditioner compressor is adjusted upwards, and the variable-frequency air conditioner compressor is adopted, so that the refrigerating effect of the air conditioner can be ensured, and the cost is reduced.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a frequency limiting control method, device, equipment and medium of an air conditioner and a compressor thereof.
Background
The air conditioner compressor is installed in the outdoor unit to compress and drive refrigerant, and the air conditioner compressor extracts refrigerant from the low pressure area, compresses the refrigerant, sends the compressed refrigerant to the high pressure area to cool and condense, and emits heat to air through the radiating fins to realize the effect of regulating air temperature. When the external temperature of the variable-frequency air conditioner compressor is too high, the variable-frequency air conditioner compressor often reduces the frequency due to high-voltage frequency limitation, current frequency limitation, too high exhaust temperature and the like, so that the refrigerating effect of the air conditioner is affected.
In the prior art, two sets of devices, namely an air conditioner compressor capable of frequency conversion and an air conditioner compressor with fixed frequency, are generally adopted in an outdoor unit, and when the air conditioner compressor capable of frequency conversion is over high in external temperature, the air conditioner compressor with fixed frequency is switched in time to work when the frequency reduction possibly occurs, so that the refrigerating effect of an air conditioner is ensured. However, the prior art solution requires two sets of devices, namely an air conditioner compressor capable of frequency conversion and an air conditioner compressor capable of fixed frequency, and is high in cost.
Accordingly, there is a need in the art for a new solution to the above-mentioned problems.
Disclosure of Invention
In order to overcome the above-mentioned drawbacks, the present invention is provided to provide a frequency limiting control method, apparatus, device and medium for an air conditioner compressor, which solves or at least partially solves the technical problem how to reliably and inexpensively improve the refrigeration effect of the air conditioner compressor in the case that the refrigeration effect is reduced due to frequency limiting of a high voltage, frequency limiting of a current, excessive temperature of exhaust and the like.
In a first aspect, there is provided a frequency limiting control method of an air conditioner compressor, the method comprising:
After detecting that the outdoor environment temperature is greater than a preset temperature threshold value and the operating frequency of the air conditioner compressor is less than a preset frequency threshold value, acquiring the temperature difference between the actual temperature and the target temperature of the indoor environment temperature and the temperature difference change rate of the temperature difference;
And selectively adjusting the set frequency limiting value of the air conditioner compressor up according to the comparison result of the temperature difference and the preset temperature difference threshold value and/or the comparison result of the temperature difference change rate and the preset change rate threshold value.
In one technical scheme of the frequency limiting control method of the air conditioner compressor, the step of selectively adjusting the set frequency limiting value of the air conditioner compressor according to the comparison result of the temperature difference and the preset temperature difference threshold value and/or the comparison result of the temperature difference change rate and the preset change rate threshold value comprises the following steps:
Step S11: judging whether the temperature difference is larger than a preset temperature difference threshold value according to a comparison result of the temperature difference and the preset temperature difference threshold value;
If yes, the set frequency limit value of the air conditioner compressor is adjusted upwards, and then the step S12 is carried out;
if not, the set frequency limit value of the air conditioner compressor is not adjusted, and then the step S12 is carried out;
Step S12: judging whether the temperature difference change rate is smaller than a preset change rate threshold value according to a comparison result of the temperature difference change rate and the preset change rate threshold value;
If yes, the set frequency limit value of the air conditioner compressor is adjusted upwards;
if not, the set frequency limit value of the air conditioner compressor is not adjusted.
In one technical scheme of the frequency limiting control method of the air conditioner compressor, after the step of selectively adjusting the set frequency limiting value of the air conditioner compressor according to the comparison result of the temperature difference and the preset temperature difference threshold value and/or the comparison result of the temperature difference change rate and the preset change rate threshold value, the method further comprises:
step S21: acquiring an adjusted set frequency limit value obtained after the set frequency limit value of the air conditioner compressor is selectively adjusted upwards, and controlling the operation of the air conditioner compressor for a preset time period according to the adjusted set frequency limit value;
Step S22: judging whether the running frequency of the air conditioner compressor is smaller than a preset frequency threshold value or not;
If yes, go to step S23; if not, go to step S24;
Step S23: executing the step of selectively adjusting the set frequency limit value of the air conditioner compressor upwards according to the comparison result of the temperature difference and the preset temperature difference threshold value and/or the comparison result of the temperature difference change rate and the preset change rate threshold value again so as to re-acquire the adjusted set frequency limit value and turning to the step S22;
step S24: and continuously controlling the operation of the air conditioner compressor according to the adjusted set frequency limiting value.
In one technical scheme of the frequency limiting control method of the air conditioner compressor, the step of continuously controlling the operation of the air conditioner compressor according to the adjusted set frequency limiting value specifically comprises the following steps:
Judging whether the outdoor environment temperature is greater than a preset temperature threshold value or not in the process of continuously controlling the operation of the air conditioner compressor according to the adjusted set frequency limiting value;
if yes, executing the step of judging whether the running frequency of the air conditioner compressor is smaller than a preset frequency threshold value again;
If not, the operation of the air conditioner compressor is controlled according to the set frequency limiting value, and the operation of the air conditioner compressor is not controlled according to the adjusted set frequency limiting value.
In one technical scheme of the frequency limiting control method of the air conditioner compressor, before the step of controlling the air conditioner compressor to run for a preset time period according to the adjusted set frequency limiting value, the method further comprises:
acquiring a difference value between the adjusted set frequency limit value and the set frequency limit value;
Judging whether the difference value is larger than a preset difference value threshold value or not;
If yes, the adjusted set frequency limiting value is adjusted downwards until the difference value is smaller than or equal to a preset difference value threshold value; if not, the adjusted set frequency limit value is not adjusted downwards.
In one technical scheme of the frequency limiting control method of the air conditioner compressor, the set frequency limiting value at least comprises an exhaust pressure frequency limiting value, a current frequency limiting value and an exhaust temperature frequency limiting value which are respectively determined according to the exhaust pressure, the current and the exhaust temperature of the air conditioner compressor.
In a second aspect, there is provided a frequency limiting control apparatus of an air conditioner compressor, the frequency limiting control apparatus of the air conditioner compressor including:
the indoor temperature difference and change rate acquisition module is configured to acquire the temperature difference between the actual temperature and the target temperature of the indoor environment temperature and the temperature difference change rate of the temperature difference after detecting that the outdoor environment temperature is greater than a preset temperature threshold and the operating frequency of the air conditioner compressor is less than a preset frequency threshold;
The frequency limiting value adjusting module is configured to selectively adjust the set frequency limiting value of the air conditioner compressor upwards according to the comparison result of the temperature difference and the preset temperature difference threshold value and/or the comparison result of the temperature difference change rate and the preset change rate threshold value.
In a third aspect, a computer device is provided, where the computer device includes a processor and a storage device, where the storage device is adapted to store a plurality of program codes, where the program codes are adapted to be loaded and executed by the processor to perform the frequency limiting control method of the air conditioner compressor according to any one of the technical solutions of the frequency limiting control method of the air conditioner compressor.
In a fourth aspect, there is provided a computer readable storage medium having stored therein a plurality of program codes adapted to be loaded and operated by a processor to perform the frequency limiting control method of an air conditioner compressor according to any one of the technical aspects of the frequency limiting control method of an air conditioner compressor.
In a fifth aspect, an air conditioner is provided, the air conditioner comprising the frequency limiting control device of the air conditioner compressor or comprising the computer device.
The technical scheme provided by the invention has at least one or more of the following beneficial effects:
In the technical scheme of implementing the invention, after detecting that the outdoor environment temperature is greater than a preset temperature threshold value and the operating frequency of an air conditioner compressor is less than a preset frequency threshold value in the operation of the air conditioner, acquiring the temperature difference between the actual temperature and the target temperature of the indoor environment temperature and the temperature difference change rate of the temperature difference, and finally determining whether the set frequency limiting value of the air conditioner needs to be adjusted upwards according to the temperature difference, the preset temperature difference, the temperature difference change rate and the preset change rate threshold value. In the first aspect, whether the air conditioner compressor is in a down-conversion state is timely judged when the working environment temperature of the air conditioner compressor is detected to be too high, and the set frequency limit value of the air conditioner compressor is adjusted upwards when the air conditioner compressor is in the down-conversion state, so that the air conditioner compressor can operate at a higher frequency, and the refrigerating efficiency of the air conditioner is ensured. In the second aspect, the improvement of the refrigerating efficiency when the frequency reduction occurs in the air conditioner compressor can be realized by only adopting one set of air conditioner compressor capable of frequency conversion, and the manufacturing cost of the air conditioner is reduced.
Drawings
The present disclosure will become more readily understood with reference to the accompanying drawings. As will be readily appreciated by those skilled in the art: the drawings are for illustrative purposes only and are not intended to limit the scope of the present invention. Wherein:
Fig. 1 is a flow chart illustrating main steps of a frequency limiting control method of an air conditioner compressor according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating the main steps for adjusting a set frequency limit value of an air conditioner compressor according to one embodiment of the present invention;
Fig. 3 is a schematic block diagram showing a main structure of a frequency limiting control apparatus of an air conditioner compressor according to an embodiment of the present invention.
Detailed Description
Some embodiments of the invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
In the description of the present invention, a "module," "processor" may include hardware, software, or a combination of both. A module may comprise hardware circuitry, various suitable sensors, communication ports, memory, or software components, such as program code, or a combination of software and hardware. The processor may be a central processor, a microprocessor, a digital signal processor, or any other suitable processor. The processor has data and/or signal processing functions. The processor may be implemented in software, hardware, or a combination of both. Non-transitory computer readable storage media include any suitable medium that can store program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random access memory, and the like. The term "a and/or B" means all possible combinations of a and B, such as a alone, B alone or a and B.
The following describes an embodiment of a frequency limiting control method of an air conditioner compressor.
1. Frequency limiting control method embodiment of first air conditioner compressor
Referring to fig. 1, fig. 1 is a flow chart illustrating main steps of a frequency limiting control method of an air conditioner compressor according to a first embodiment of the present invention. As shown in fig. 1, the frequency limiting control method of the air conditioner compressor in the embodiment of the invention mainly includes the following steps S101 to S102.
Step S101: after detecting that the outdoor environment temperature is greater than a preset temperature threshold and the operating frequency of the air conditioner compressor is less than a preset frequency threshold, acquiring the temperature difference between the actual temperature and the target temperature of the indoor environment temperature and the temperature difference change rate of the temperature difference.
Because the air conditioner compressor is placed in the air conditioner outdoor unit, the outdoor ambient temperature can be considered as the ambient temperature at which the air conditioner compressor works. When the working environment temperature of the air conditioner compressor is too high, the air conditioner compressor often reduces the frequency due to high-voltage frequency limitation, current frequency limitation, too high exhaust temperature and the like, and the refrigerating effect of the air conditioner is affected. The preset temperature threshold is a critical value of the occurrence of frequency reduction and normal operation of the air conditioner compressor. Because the types and the powers of the air conditioners are different, the preset temperature threshold can be set by a person skilled in the art according to actual conditions, and the specific numerical value of the preset temperature threshold is not limited. The preset frequency threshold is a frequency value of normal operation of the air conditioner compressors, the types and the powers of the air conditioners are different, and the frequency values of normal operation of different air conditioner compressors are different. The preset frequency threshold can be set by a person skilled in the art according to the parameters of the air conditioner, and the specific numerical value of the preset frequency threshold is not limited by the invention. The target temperature of the indoor environment temperature is the temperature which the user wants the indoor environment to reach, and the user can set the target temperature by himself. The rate of change of the temperature difference between the actual temperature and the target temperature of the indoor environment temperature reflects the efficiency of indoor cooling. The higher the operation frequency of the air conditioner compressor is, the better the refrigerating effect is, and the larger the temperature difference change rate between the actual temperature and the target temperature of the indoor environment temperature is.
Step S102: and selectively adjusting the set frequency limiting value of the air conditioner compressor up according to the comparison result of the temperature difference and the preset temperature difference threshold value and/or the comparison result of the temperature difference change rate and the preset change rate threshold value.
When the temperature difference between the actual temperature of the indoor environment temperature and the target temperature is large, the air conditioner refrigeration effect at the moment may be poor, and the air conditioner compressor may have frequency reduction. The preset change rate threshold is a critical value of the frequency reduction phenomenon and normal operation of the air conditioner compressor. When the temperature difference change rate is lower than a preset change rate threshold value, the air conditioner compressor may have a frequency-reducing phenomenon. Because the type and the power of the air conditioner are different, a person skilled in the art can set the preset change rate threshold according to actual conditions, and the specific numerical value of the preset temperature threshold is not limited. The set frequency limit value of the air conditioner compressor is set for ensuring the safety and stable operation of the air conditioner compressor. Generally, the frequency of the air conditioner compressor when the air conditioner compressor operates at a set frequency limit value is smaller than the maximum frequency of the air conditioner compressor under the premise of safe and stable operation. The person skilled in the art can choose whether the air conditioner compressor is down-converted according to the comparison result of the temperature difference and the preset temperature difference threshold value and/or the comparison result of the temperature difference change rate and the preset change rate threshold value according to the actual demand, so as to up-regulate the set frequency limit value of the air conditioner compressor to improve the frequency of the air conditioner compressor.
As an example, the actual temperature of the indoor ambient temperature is 33 degrees celsius, the target temperature is 27 degrees celsius, the preset temperature difference threshold is 5 degrees celsius, the preset change rate threshold is 1 degree celsius/minute, and the temperature difference change rate is 0.4 degree celsius/minute. Because the temperature difference is larger than a preset temperature difference threshold value and the temperature difference change rate is smaller than a preset change rate threshold value, the fact that the air conditioner compressor is likely to have frequency reduction is judged, and the set frequency limit value of the air conditioner compressor needs to be adjusted upwards to ensure the refrigerating effect of the air conditioner.
Based on the above-mentioned methods from step S101 to step S102, after detecting that the outdoor ambient temperature is greater than the preset temperature threshold and the operating frequency of the air conditioner compressor is less than the preset frequency threshold in the operation of the air conditioner, that is, when the air conditioner compressor has frequency reduction, the refrigeration effect of the air conditioner is determined by obtaining the temperature difference between the actual temperature and the target temperature of the indoor ambient temperature and the temperature difference change rate of the temperature difference, and finally, whether the set frequency limit value of the air conditioner needs to be adjusted upwards is determined according to the temperature difference and the preset temperature difference and the temperature difference change rate and the preset change rate threshold. Under the condition that the air conditioner refrigerating effect is poor, the set frequency limiting value of the air conditioner compressor is adjusted upwards, so that the air conditioner compressor can operate at a higher frequency, and the refrigerating efficiency of the air conditioner is ensured.
As further described in the above step S102, in some cases, a situation may occur in which the temperature difference is smaller than the preset temperature difference threshold value but the temperature difference change rate is smaller than the preset temperature difference change rate, or a situation in which the temperature difference is larger than the preset temperature difference threshold value but the temperature difference change rate is larger than the preset temperature difference change rate, and if only the magnitude of the temperature difference is compared with the preset temperature difference threshold value or only the magnitude of the temperature difference change rate is compared with the magnitude of the preset temperature difference change rate, a missed judgment or a false judgment may occur.
Preferably, in order to improve the accuracy of judging whether the air conditioner compressor is in the down-conversion state, whether the temperature difference is larger than a preset temperature difference threshold value can be judged first, and then whether the temperature difference change rate is smaller than the preset change rate threshold value is judged according to the comparison result of the temperature difference change rate and the preset change rate threshold value. Specifically, the set frequency limit value of the air conditioner compressor may be selectively adjusted upward through steps S11 to S12.
Step S11: judging whether the temperature difference is larger than a preset temperature difference threshold value according to a comparison result of the temperature difference and the preset temperature difference threshold value;
If yes, the set frequency limit value of the air conditioner compressor is adjusted upwards, and then the step S12 is carried out;
If not, the set frequency limit value of the air conditioner compressor is not adjusted, and then the process goes to step S12.
Because the temperature difference is larger than the preset temperature difference threshold value, which means that the refrigerating capacity of the air conditioner does not reach the expected value, the air conditioner compressor may have frequency reduction, and therefore the set frequency limiting value needs to be adjusted upwards. When the temperature difference is not greater than the preset temperature threshold, the air conditioner refrigerating capacity is normal, and in order to further confirm whether the air conditioner compressor has frequency reduction, the temperature difference change rate is required to be further compared with the preset temperature difference change rate.
Step S12: judging whether the temperature difference change rate is smaller than a preset change rate threshold value according to a comparison result of the temperature difference change rate and the preset change rate threshold value;
If yes, the set frequency limit value of the air conditioner compressor is adjusted upwards;
if not, the set frequency limit value of the air conditioner compressor is not adjusted.
The temperature difference change rate is smaller than the preset change rate threshold, which means that the falling speed of the indoor temperature is slower, the refrigerating effect of the air conditioner does not reach the expectation, and the air conditioner compressor may have frequency reduction, so that the frequency limiting value of the air conditioner compressor needs to be adjusted upwards.
Based on the method described in the above steps S11 to S12, firstly, according to the obtained comparison result of the difference between the indoor environment temperature and the target temperature and the preset difference threshold, it is determined whether the set frequency limit value of the air conditioner compressor needs to be adjusted upwards, secondly, the difference change rate is compared with the preset change rate threshold, and according to the comparison result of the difference change rate and the preset change rate threshold, it is determined whether the frequency limit value of the air conditioner compressor needs to be adjusted upwards again, so that the pre-determination on whether the frequency limit value of the air conditioner compressor needs to be adjusted upwards due to the fact that the difference between the temperature and the target temperature is smaller than the preset difference threshold or the difference change rate is larger than the preset change rate threshold is avoided, and the accuracy of determining whether the frequency limit value of the air conditioner compressor needs to be adjusted upwards is improved.
The air conditioner compressor consumes electric energy and absorbs the refrigerant from the air suction port in the working process, and simultaneously discharges the refrigerant from the air discharge port. By setting the frequency limiting value for the air conditioner compressor, the running frequency of the air conditioner compressor can be controlled, so that the air conditioner compressor and other air conditioner components are prevented from being damaged.
In a first embodiment according to the present invention, the set frequency limit value includes at least a discharge pressure frequency limit value, a current frequency limit value, and a discharge temperature frequency limit value, which are respectively determined according to a discharge pressure, a current, and a discharge temperature of the air conditioner compressor.
The exhaust pressure frequency limit value, the current frequency limit value and the exhaust temperature frequency limit value of the air conditioner compressor are in the parameter range obtained by normal operation of the air conditioner compressor.
As an example, in case that the air conditioner compressor is operating normally, the discharge pressure of the air conditioner compressor is between 1MPa and 2.5MPa, the discharge temperature of the air conditioner compressor is between 45 and 90 degrees celsius, and the current of the air conditioner compressor is between 3.5A and 12A. The exhaust pressure frequency limit value of the air conditioner compressor can be set to be 2MPa, the exhaust temperature frequency limit value of the air conditioner compressor is set to be 70 ℃, and the current frequency limit value of the air conditioner compressor is set to be 9A.
The exhaust pressure frequency limiting value, the current frequency limiting value and the exhaust temperature frequency limiting value are respectively determined according to the exhaust pressure, the current and the exhaust temperature of the air conditioner compressor, so that the air conditioner compressor can work in a safe interval, and faults of the air conditioner compressor and other air conditioner components due to overhigh operation frequency of the air conditioner compressor are avoided.
The above is a description of the embodiment of the frequency limiting control method of the first air conditioner compressor, and the following continues to describe the embodiment of the frequency limiting control method of the second air conditioner compressor.
2. Frequency limiting control method embodiment of second air conditioner compressor
After adjusting the frequency limit value of the air conditioner compressor, the operating frequency of the air conditioner compressor is also changed. However, after the frequency limit value of the air conditioner compressor is adjusted, the operation frequency of the air conditioner compressor may still not be in the normal working range, and the refrigerating effect of the air conditioner is poor.
Referring to fig. 2, in a second embodiment of the present invention, after the step of selectively adjusting the set frequency limit value of the air conditioner compressor according to the comparison result of the temperature difference with the preset temperature difference threshold value and/or the comparison result of the temperature difference change rate with the preset change rate threshold value (the aforementioned step S102), the following steps S21 to S24 may be further included to continuously adjust the set frequency limit value of the air conditioner compressor:
Step S21: and acquiring an adjusted set frequency limit value obtained after the set frequency limit value of the air conditioner compressor is selectively adjusted upwards, and controlling the air conditioner compressor to run for a preset time period according to the adjusted set frequency limit value.
During operation of the air conditioning compressor at the set frequency limit value, frequency down-conversion may occur. When the air conditioner compressor is down-converted, the refrigerating effect of the air conditioner is affected. In order to ensure the refrigerating effect of the air conditioner, the set frequency limiting value can be adjusted upwards to obtain the adjusted set frequency limiting value. Since the frequency limit value is up-regulated, the operating frequency of the air conditioner compressor may be higher than that when operating at the set frequency limit value.
Step S22: and judging whether the running frequency of the air conditioner compressor is smaller than a preset frequency threshold value.
Although the set frequency limit value of the air conditioner compressor has been up-regulated, the operating frequency of the air conditioner compressor may still be lower than that of the normally operating air conditioner compressor. Therefore, it is necessary to determine again whether the air conditioner compressor is down-converted.
If yes, go to step S23; if not, go to step S24;
step S23: and executing the step of selectively adjusting the set frequency limit value of the air conditioner compressor upwards according to the comparison result of the temperature difference and the preset temperature difference threshold value and/or the comparison result of the temperature difference change rate and the preset change rate threshold value (the step S102) again so as to reacquire the adjusted set frequency limit value and transfer to the step S22.
Because the operating frequency of the air conditioner compressor is smaller than the preset frequency threshold value, the air conditioner compressor still reduces the frequency, and therefore the set frequency limit value of the air conditioner compressor needs to be adjusted upwards again, and the operating frequency of the air conditioner compressor is improved.
Step S24: and continuously controlling the operation of the air conditioner compressor according to the adjusted set frequency limiting value.
Through judgment, the running frequency of the air conditioner compressor is not smaller than the preset frequency threshold value, and the air conditioner compressor works normally, so that the adjusted set frequency limit value of the air conditioner compressor does not need to be adjusted further.
Based on the methods described in the above steps 21 to 24, the operating frequency of the air conditioner compressor is changed after the set frequency limit value of the air conditioner compressor is adjusted. When the air conditioner compressor is operated at the adjusted set frequency limit value, the air conditioner compressor may still not be in a normal operating state. The air conditioner compressor is further adjusted in the frequency-reducing state by judging whether the air conditioner compressor which is operated with the adjusted set frequency-limiting value is frequency-reducing or not, and the air conditioner compressor is ensured to be operated with the adjusted frequency-limiting value to normally operate.
During the operation of the air conditioner, the outdoor ambient temperature may vary. The outdoor ambient temperature may drop, for example, when the outdoor weather changes from sunny to cloudy or rainy. Also, for example, when the air conditioner is operated from day to night, the outdoor ambient temperature may be lowered. Therefore, the frequency limit value needs to be adjusted to ensure the safety of the air conditioner compressor.
In a possible implementation manner of the second embodiment of the present invention, the step of "continuing to control the operation of the air conditioner compressor according to the adjusted set frequency limit value" (the aforementioned step S24) specifically includes the following steps 31 to 33:
Step 31: in the process of continuously controlling the operation of the air conditioner compressor according to the adjusted set frequency limiting value, judging whether the outdoor environment temperature is greater than a preset temperature threshold value, if so, executing step 32; if not, step 33 is performed.
Step 32: the step of "judging whether the operating frequency of the air conditioner compressor is less than the preset frequency threshold" (the aforementioned step S22) is performed again.
Step 33: and controlling the operation of the air conditioner compressor according to the set frequency limiting value, and controlling the operation of the air conditioner compressor according to the adjusted set frequency limiting value.
Because the outdoor environment temperature is lower than the preset temperature threshold value, the air conditioner compressor is not reduced in frequency due to the fact that the outdoor environment is too high. In order to ensure the safety of the air conditioner compressor, the frequency limit of the air conditioner compressor needs to be restored to a set frequency limit value.
As an example. If the air-conditioning compressor works normally, the exhaust pressure of the air-conditioning compressor is between 1MPa and 2.5MPa, the exhaust temperature of the air-conditioning compressor is between 45 and 90 ℃, and the current of the air-conditioning compressor is between 3.5A and 12A. The set frequency limit value of the exhaust pressure of the air conditioner compressor is 2MPa, the set frequency limit value of the exhaust temperature of the air conditioner compressor is 70 ℃, and the set frequency limit value of the current of the air conditioner compressor is 9A. The preset temperature threshold is 28 ℃, the set frequency limit value of the adjusted exhaust temperature is 75 ℃, the set frequency limit value of the adjusted current is 10A, and the set frequency limit value of the adjusted exhaust pressure is 2.3MPa. In the running of the air conditioner, the outdoor environment temperature is measured to be 23.5 ℃, and the outdoor environment temperature is lower than the 28 ℃ set by the preset temperature threshold value, so that the frequency limit value of the air conditioner is restored to be 70 ℃ at the set frequency limit value of the exhaust temperature, 9A at the set frequency limit value of the current and 2MPa at the set frequency limit value of the exhaust pressure.
Based on the methods described in steps 31 to 33, it is determined whether the outdoor environment temperature is still greater than the preset threshold value during the operation of the air conditioner compressor. When the outdoor environment temperature is smaller than a preset threshold value, the air conditioner compressor is controlled to run at a set frequency limiting value in time, so that the frequency limiting value of the air conditioner compressor is recovered in time when the working environment of the air conditioner compressor can not cause frequency reduction any more, and the running safety of the air conditioner compressor is ensured on the premise that the normal use of the air conditioner by a user is not influenced.
In order to ensure that the air conditioner compressor can safely and stably operate, when the set frequency limit value of the air conditioner compressor is adjusted and set and the air conditioner compressor is controlled to operate, the air conditioner compressor needs to be ensured to operate within a safe range.
In another possible implementation manner according to the second embodiment of the present invention, before the step of controlling the operation of the air-conditioning compressor for a preset time period according to the adjusted set frequency limit value (the aforementioned step S21), the method further includes adjusting the set frequency limit value by the following steps 41 to 43:
step 41: and obtaining the difference value between the adjusted set frequency limit value and the set frequency limit value.
Step 42: whether the difference is greater than a preset difference threshold is determined, if yes, step 43 is executed, and if not, step 44 is executed.
The preset difference threshold is a parameter set by a person skilled in the art according to different air conditioners, and the specific parameter of the preset difference threshold is not limited by the invention.
Step 43: and (4) lowering the adjusted set frequency limiting value obtained in the step (41) until the difference value is smaller than or equal to a preset difference value threshold.
When the difference is greater than the preset difference threshold, there may be a risk of damage to the air conditioner compressor, and thus the adjusted set frequency limit value acquired in step 41 needs to be adjusted down.
Step 44: the adjusted set frequency limit value obtained in step 41 is not adjusted down.
When the difference is smaller than or equal to the preset difference threshold, the air conditioner compressor is in a safe working interval, and the risk of damage does not exist, so that the adjusted set frequency limiting value acquired in the step 41 does not need to be adjusted downwards.
Based on the methods described in the above steps 41 to 44, when the set frequency limit value is adjusted, whether the adjusted set frequency limit value is safe or not can be determined by comparing the difference between the adjusted set frequency limit value and the set frequency limit value with the preset difference. When the difference is greater than a preset difference threshold, the air conditioner compressor cannot be safely operated. By adjusting the adjusted set frequency limiting value downwards, the safe operation of the air conditioner compressor is ensured.
It should be noted that, although the foregoing embodiments describe the steps in a specific order, it will be understood by those skilled in the art that, in order to achieve the effects of the present invention, the steps are not necessarily performed in such an order, and may be performed simultaneously (in parallel) or in other orders, and these variations are within the scope of the present invention.
It will be appreciated by those skilled in the art that the present invention may implement all or part of the above-described methods according to the above-described embodiments, or may be implemented by means of a computer program for instructing relevant hardware, where the computer program may be stored in a computer readable storage medium, and where the computer program may implement the steps of the above-described embodiments of the method when executed by a processor. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable storage medium may include: any entity or device, medium, usb disk, removable hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier wave signals, telecommunications signals, software distribution media, and the like capable of carrying the computer program code. It should be noted that the computer readable storage medium may include content that is subject to appropriate increases and decreases as required by jurisdictions and by jurisdictions in which such computer readable storage medium does not include electrical carrier signals and telecommunications signals.
Further, the invention also provides a frequency limiting control device of the air conditioner compressor.
Referring to fig. 3, fig. 3 is a main block diagram of a frequency limiting control apparatus of an air conditioner compressor according to an embodiment of the present invention. As shown in fig. 3, the frequency limiting control device of the air conditioner compressor in the embodiment of the invention mainly includes an indoor temperature difference and change rate obtaining module 301 and a frequency limiting value adjusting module 302. In some embodiments, one or more of the indoor temperature difference and its rate of change acquisition module 301, the frequency limit adjustment module 302 may be combined together into one module. In some embodiments, the indoor temperature difference and its rate of change acquisition module 301 may be configured to acquire the temperature difference of the actual temperature of the indoor environment temperature from the target temperature and the temperature difference rate of change of the temperature difference after detecting that the outdoor environment temperature is greater than the preset temperature threshold and the operating frequency of the air conditioner compressor is less than the preset frequency threshold. The frequency limit adjustment module 302 may be configured to selectively up-adjust a set frequency limit of the air conditioning compressor based on a comparison of the temperature difference to a preset temperature difference threshold and/or a comparison of the temperature difference rate of change to a preset rate of change threshold. In one embodiment, the description of the specific implementation function may be described with reference to steps S101 to S102.
The frequency limiting control device of the air conditioner compressor is used for executing the frequency limiting control method embodiment of the air conditioner compressor shown in fig. 1 to 2, and the technical principles of the frequency limiting control device and the frequency limiting control method embodiment of the air conditioner compressor are similar to each other, so that those skilled in the art can clearly understand that, for convenience and brevity of description, the specific working process and related description of the frequency limiting control device of the air conditioner compressor can refer to the description of the frequency limiting control method embodiment of the air conditioner compressor, and the description is omitted herein.
Further, the invention also provides computer equipment.
In an embodiment of a computer apparatus according to the present invention, the computer apparatus includes a processor and a storage device, the storage device may be configured to store a program for executing the frequency limiting control method of the air conditioner compressor of the above-described method embodiment, and the processor may be configured to execute the program in the storage device, the program including, but not limited to, the program for executing the frequency limiting control method of the air conditioner compressor of the above-described method embodiment. For convenience of explanation, only those portions of the embodiments of the present invention that are relevant to the embodiments of the present invention are shown, and specific technical details are not disclosed, please refer to the method portions of the embodiments of the present invention. The computer device may be a control apparatus device formed of various electronic devices.
Further, the invention also provides a computer readable storage medium.
In an embodiment of a computer-readable storage medium according to the present invention, the computer-readable storage medium may be configured to store a program for executing the frequency limiting control method of the air conditioner compressor of the above-described method embodiment, the program being loadable and executable by a processor to implement the frequency limiting control method of the air conditioner compressor described above. For convenience of explanation, only those portions of the embodiments of the present invention that are relevant to the embodiments of the present invention are shown, and specific technical details are not disclosed, please refer to the method portions of the embodiments of the present invention. The computer readable storage medium may be a storage device including various electronic devices, and optionally, the computer readable storage medium in the embodiments of the present invention is a non-transitory computer readable storage medium.
Furthermore, the invention also provides an air conditioner, and in one air conditioner embodiment of the invention, the air conditioner further comprises a frequency limiting control device of the air conditioner compressor or a computer device according to the scheme of the computer device. For convenience of explanation, only those portions of the apparatus or computer device according to the embodiments of the present invention are shown, and specific technical details are not disclosed.
Thus far, the technical solution of the present invention has been described in connection with one embodiment shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.
Claims (10)
1. A method for controlling a frequency limit of an air conditioner compressor, the method comprising:
After detecting that the outdoor environment temperature is greater than a preset temperature threshold value and the operating frequency of the air conditioner compressor is less than a preset frequency threshold value, acquiring the temperature difference between the actual temperature and the target temperature of the indoor environment temperature and the temperature difference change rate of the temperature difference;
and selectively adjusting the set frequency limiting value of the air conditioner compressor up according to the comparison result of the temperature difference and the preset temperature difference threshold value and/or the comparison result of the temperature difference change rate and the preset change rate threshold value.
2. The method according to claim 1, wherein the step of selectively adjusting the set frequency limit value of the air conditioner compressor according to the comparison result of the temperature difference with a preset temperature difference threshold value and/or the comparison result of the temperature difference change rate with a preset change rate threshold value comprises:
Step S11: judging whether the temperature difference is larger than the preset temperature difference threshold value according to a comparison result of the temperature difference and the preset temperature difference threshold value;
If yes, the set frequency limit value of the air conditioner compressor is adjusted upwards, and then the step S12 is carried out;
if not, the set frequency limit value of the air conditioner compressor is not adjusted, and then the step S12 is carried out;
Step S12: judging whether the temperature difference change rate is smaller than the preset change rate threshold value according to a comparison result of the temperature difference change rate and the preset change rate threshold value;
If yes, the set frequency limit value of the air conditioner compressor is adjusted upwards;
if not, the set frequency limit value of the air conditioner compressor is not adjusted.
3. The method according to claim 1, wherein after the step of selectively adjusting the set frequency limit value of the air conditioner compressor according to the comparison result of the temperature difference with a preset temperature difference threshold value and/or the comparison result of the temperature difference change rate with a preset change rate threshold value, the method further comprises:
Step S21: acquiring an adjusted set frequency limit value obtained after the set frequency limit value of the air conditioner compressor is selectively adjusted upwards, and controlling the running preset time length of the air conditioner compressor according to the adjusted set frequency limit value;
Step S22: judging whether the running frequency of the air conditioner compressor is smaller than the preset frequency threshold value or not;
If yes, go to step S23; if not, go to step S24;
step S23: executing the step of selectively adjusting the set frequency limit value of the air conditioner compressor upwards according to the comparison result of the temperature difference and the preset temperature difference threshold value and/or the comparison result of the temperature difference change rate and the preset change rate threshold value again so as to acquire the adjusted set frequency limit value again and then turning to the step S22;
Step S24: and continuously controlling the operation of the air conditioner compressor according to the adjusted set frequency limiting value.
4. The method of controlling the frequency limit of an air conditioner compressor according to claim 3, wherein the step of continuing to control the operation of the air conditioner compressor according to the adjusted set frequency limit value comprises:
in the process of continuously controlling the operation of the air conditioner compressor according to the adjusted set frequency limiting value, judging whether the outdoor environment temperature is greater than the preset temperature threshold value or not;
if yes, executing the step of judging whether the running frequency of the air conditioner compressor is smaller than the preset frequency threshold value again;
if not, controlling the operation of the air conditioner compressor according to the set frequency limiting value, and not controlling the operation of the air conditioner compressor according to the adjusted set frequency limiting value.
5. The method of controlling the frequency limit of an air conditioner compressor according to claim 3, wherein before the step of controlling the air conditioner compressor to operate for a preset period of time according to the adjusted set frequency limit value, the method further comprises:
Acquiring a difference value between the adjusted set frequency limit value and the set frequency limit value;
Judging whether the difference is larger than a preset difference threshold;
if yes, the adjusted set frequency limiting value is adjusted downwards until the difference value is smaller than or equal to the preset difference value threshold value; if not, the adjusted set frequency limit value is not adjusted downwards.
6. The frequency limiting control method of an air conditioner compressor according to claim 1, wherein the set frequency limiting value includes at least a discharge pressure frequency limiting value, a current frequency limiting value, and a discharge temperature frequency limiting value, which are determined according to a discharge pressure, a current, and a discharge temperature of the air conditioner compressor, respectively.
7. A frequency limiting control apparatus of an air conditioner compressor, the apparatus comprising:
The indoor temperature difference and change rate acquisition module is configured to acquire the temperature difference between the actual temperature and the target temperature of the indoor environment temperature and the temperature difference change rate of the temperature difference after detecting that the outdoor environment temperature is greater than a preset temperature threshold and the operating frequency of the air conditioner compressor is less than a preset frequency threshold;
the frequency limiting value adjusting module is configured to selectively adjust the set frequency limiting value of the air conditioner compressor upwards according to the comparison result of the temperature difference and the preset temperature difference threshold value and/or the comparison result of the temperature difference change rate and the preset change rate threshold value.
8. A computer device comprising a processor and a storage means, said storage means being adapted to store a plurality of program codes, characterized in that said program codes are adapted to be loaded and run by said processor to perform the frequency limiting control method of an air conditioner compressor according to any one of claims 1 to 6.
9. A computer readable storage medium, in which a plurality of program codes are stored, characterized in that the program codes are adapted to be loaded and executed by a processor to perform the frequency limiting control method of an air conditioner compressor according to any one of claims 1 to 6.
10. An air conditioner characterized by comprising the frequency limiting control device of the air conditioner compressor of claim 7 or comprising the computer device of claim 8.
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| CN202211298151.0A CN117948681A (en) | 2022-10-21 | 2022-10-21 | Air conditioner and frequency limiting control method, device, equipment and medium of compressor of air conditioner |
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| CN202211298151.0A CN117948681A (en) | 2022-10-21 | 2022-10-21 | Air conditioner and frequency limiting control method, device, equipment and medium of compressor of air conditioner |
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