CN116971161A - Compressor frequency control method, device, equipment and storage medium - Google Patents
Compressor frequency control method, device, equipment and storage medium Download PDFInfo
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- CN116971161A CN116971161A CN202310764317.1A CN202310764317A CN116971161A CN 116971161 A CN116971161 A CN 116971161A CN 202310764317 A CN202310764317 A CN 202310764317A CN 116971161 A CN116971161 A CN 116971161A
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- 230000002829 reductive effect Effects 0.000 claims abstract description 51
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 230000036760 body temperature Effects 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 9
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/32—Control of operations performed in domestic laundry dryers
- D06F58/34—Control of operations performed in domestic laundry dryers characterised by the purpose or target of the control
- D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/26—Heat pumps
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Abstract
The application discloses a compressor frequency control method, a device, equipment and a storage medium, wherein the method comprises the following steps: reducing the operating frequency of the compressor to a first frequency value based on the torque compensation frequency, the first frequency value being greater than or equal to the torque compensation frequency; maintaining the operating frequency of the compressor at a first frequency value for a preset duration of operation; the operating frequency of the compressor is reduced to a second frequency value. The operating frequency of the compressor is reduced to a first frequency value which is larger than or equal to the moment compensation frequency, the operating frequency of the compressor is kept at the first frequency value for a preset period of time, so that the pressure of the compressor is gradually reduced in a time period of the preset period of time, a current compensation mechanism of the compressor is not triggered, then the operating frequency of the compressor is reduced to a second frequency value, the operating frequency of the compressor is reduced to a lower frequency, and meanwhile, the pressure of the compressor is thoroughly reduced, so that the problem of compressor protection caused by that the pressure is not reduced due to too high frequency reduction speed is solved.
Description
Technical Field
The application relates to the technical field of compressor control, in particular to a compressor frequency control method, a device, equipment and a storage medium.
Background
With the continuous development of clothes dryer technology, most of heat pump clothes dryers are adopted to achieve clothes care effects, namely, the heat pump clothes dryers condense water vapor and generate hot air through a heat pump circulation system, so that clothes drying effects are achieved. In the early stage of drying laundry, since the laundry is wet, in order to raise the temperature of the drying drum, the compressor of the heat pump cycle is required to continuously operate.
With the long-time operation of the compressor, the pressure and the temperature of the compressor are increased continuously, and when the temperature of the compressor is detected to exceed the set temperature, the frequency-reducing logic of the compressor is triggered.
However, if the down-conversion speed of the down-conversion logic is faster, the pressure of the compressor is not reduced yet although the operation frequency of the compressor is reduced, and a problem of protecting the compressor is easily caused in case of a large pressure.
Disclosure of Invention
The present application aims to solve the above-mentioned shortcomings of the prior art and provides a compressor frequency control method, device, equipment and storage medium, which are realized through the following technical solutions.
A first aspect of the present application proposes a compressor frequency control method, the method comprising:
reducing an operating frequency of the compressor to a first frequency value based on a torque compensation frequency, the first frequency value being greater than or equal to the torque compensation frequency, the torque compensation frequency being a compressor frequency that triggers a compressor current compensation mechanism;
maintaining the operating frequency of the compressor at a first frequency value for a preset duration of operation;
and reducing the operating frequency of the compressor to a second frequency value.
In some embodiments of the application, the difference between the first frequency value and the torque compensation frequency is less than a preset threshold.
In some embodiments of the application, the method further comprises:
acquiring an operation parameter value of the compressor;
and executing the step of reducing the operating frequency of the compressor to a first frequency value based on the torque compensation frequency under the condition that the acquired operating parameter value exceeds the first preset parameter value.
In some embodiments of the application, the method further comprises:
and under the condition that the operation parameter value of the compressor does not exceed a first preset parameter value, adjusting the operation frequency of the compressor to a target frequency indicated by the frequency adjustment command according to the received frequency adjustment command.
In some embodiments of the application, the method further comprises:
after the operation frequency of the compressor is reduced to a second frequency value, obtaining an operation parameter value of the compressor;
and under the condition that the acquired operation parameter value is lower than a second preset parameter value, adjusting the operation frequency of the compressor to a target frequency indicated by the frequency adjustment command according to the received frequency adjustment command.
And under the condition that the acquired operation parameter value is not lower than a second preset parameter value, the operation frequency of the compressor is kept to be operated at the second frequency value.
In some embodiments of the application, the torque compensation frequency is between 45Hz-55 Hz.
In some embodiments of the application, the operating parameter values of the compressor include one or more of an operating current of the compressor, a body temperature of the compressor, and a body pressure of the compressor.
A second aspect of the present application provides a compressor frequency control device, the device comprising:
the first frequency reducing module is used for reducing the operation frequency of the compressor to a first frequency value based on the moment compensation frequency and keeping the operation frequency of the compressor at the first frequency value for a preset operation duration; the first frequency value is larger than or equal to the moment compensation frequency, and the moment compensation frequency is a compressor frequency triggering a compressor current compensation mechanism;
and the second frequency reducing module is used for reducing the operating frequency of the compressor to a second frequency value.
A third aspect of the application proposes an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, said processor executing said program to carry out the steps of the method according to the first aspect described above.
A fourth aspect of the application proposes a computer readable storage medium having stored thereon a computer program which when executed by a processor implements the steps of the method according to the first aspect described above.
Based on the compressor frequency control method, the device, the equipment and the storage medium, the technical scheme of the application has the following beneficial effects or benefits:
the operating frequency of the compressor is reduced to a first frequency value which is larger than or equal to the moment compensation frequency, the operating frequency of the compressor is kept at the first frequency value for a preset period of time, so that the pressure of the compressor is gradually reduced in a time period of the preset period of time, a current compensation mechanism of the compressor is not triggered, then the operating frequency of the compressor is reduced to a second frequency value, the operating frequency of the compressor is reduced to a lower frequency, and meanwhile, the pressure of the compressor is thoroughly reduced, so that the problem of compressor protection caused by that the pressure is not reduced due to too high frequency reduction speed is solved.
The foregoing description is only an overview of the present application, and is intended to provide a better understanding of the technical means of the present application, as it is embodied in the present specification, and is intended to provide a better understanding of the above and other objects, features and advantages of the present application, as it is embodied in the following description.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart illustrating an embodiment of a method of compressor frequency control according to an exemplary embodiment;
FIG. 2 is a flow chart illustrating an overall implementation of compressor frequency control according to an exemplary embodiment;
fig. 3 is a schematic view showing a structure of a compressor frequency control device according to an exemplary embodiment;
FIG. 4 is a hardware block diagram of an electronic device shown in accordance with an exemplary embodiment;
fig. 5 is a schematic diagram illustrating a structure of a storage medium according to an exemplary embodiment.
The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present application, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present application may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present application.
As mentioned above, with the long-time operation of the compressor, the problems of high pressure and high temperature of the compressor system can occur, when the upper computer detects that the temperature of the compressor is too high, the frequency-reducing logic of the compressor is triggered, because the frequency-reducing logic provided in the prior art before the application gradually reduces the frequency according to a certain constant, in order to ensure the frequency-reducing efficiency, the frequency of the compressor is reduced to a lower frequency quickly, and the pressure of the compressor is not reduced at the moment, and the problem of protecting the compressor is easily caused under the conditions of low frequency and high pressure.
Experimental research shows that in the rapid frequency reduction process, when the frequency of the compressor is reduced below the moment compensation frequency, in order to restrain the vibration of the compressor, a current compensation mechanism of the compressor is triggered, and at the moment, the current is relatively high due to the fact that the pressure of the compressor is high, so that the current of the compressor is caused to suddenly change instantaneously after the current compensation is carried out, and the compressor is protected.
Based on the above, in order to reduce the problem of compressor protection caused by the operation of the compressor under high pressure, the application provides a compressor frequency control method for realizing the purpose of self-adaptive frequency reduction of the compressor.
That is, by reducing the operating frequency of the compressor to a first frequency value that is greater than or equal to the torque compensation frequency, and maintaining the operating frequency of the compressor at the first frequency value for a preset period of time, the pressure of the compressor is gradually reduced in the preset period of time, but the current compensation mechanism of the compressor is not triggered, and then reducing the operating frequency of the compressor to a second frequency value, the operating frequency of the compressor is reduced to a lower frequency, and since the pressure and the current of the compressor are already reduced at this time, the current transient mutation problem is not caused even if the current compensation mechanism of the compressor is triggered at this time, and thus the protection problem of the compressor is not caused.
In the embodiment of the application, the compressor frequency control scheme can be applied to a heat pump air conditioner set in addition to a heat pump type clothes dryer.
The following describes the technical scheme of the present application and how the technical scheme of the present application solves the foregoing technical problems in detail with specific embodiments. The specific embodiments illustrated may be combined with one another and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Embodiment one:
fig. 1 is a schematic flow chart of an embodiment of a method for controlling frequency of a compressor according to an exemplary embodiment, and in an embodiment of the present application, the compressor is a variable frequency compressor, that is, the operating frequency of the compressor may be changed.
As shown in fig. 1, the compressor frequency control method includes the steps of:
step 101: and reducing the operating frequency of the compressor to a first frequency value based on the torque compensation frequency, wherein the first frequency value is greater than or equal to the torque compensation frequency.
Wherein the torque compensation frequency is a compressor frequency that triggers a compressor current compensation mechanism.
It is noted that the torque compensation frequency is a relatively low compressor frequency, and when the operating frequency of the compressor is lower than the torque compensation frequency, the vibration of the compressor body is aggravated because the compressor is operated at a low frequency, and the triggered current compensation mechanism dynamically determines a compensation current value according to the obtained vibration quantity data of the compressor, and then compensates the compensation current value to the operating current of the compressor, so as to achieve the purpose of suppressing the vibration of the compressor.
In one implementation, the torque compensation frequency of the compressor is between 45Hz-55 Hz.
For example, assuming that the torque compensation frequency is 50Hz, when the operation frequency of the compressor is below 50Hz, a compensation current value is calculated by collecting vibration amount data of the compressor and according to the collected vibration amount data, and then the calculated compensation current value is compensated to the current operation current of the compressor.
Before executing step 101, it may be determined whether the compressor is in a high pressure operation state by acquiring an operation parameter of the compressor, and if so, a flow of adaptively reducing the frequency of the compressor based on the torque compensation frequency is triggered.
In one possible implementation, the operation parameter value of the compressor may be obtained in real time, the operation parameter value is compared with a first preset parameter value, and the execution of step 101 is triggered in case the operation parameter value exceeds the first preset parameter value.
The operation parameter value of the compressor can represent the pressure intensity inside the compressor, and the first preset parameter value is a preset self-adaptive frequency-reducing trigger threshold value.
If the operation parameter value exceeds the first preset parameter value, the fact that the pressure intensity inside the compressor is relatively high is indicated, the frequency adjustment command issued by the upper computer is not suitable for being responded to quickly, the operation is not suitable for continuing according to the current operation frequency, the pressure intensity inside the compressor needs to be reduced in time, and long-time operation under high pressure intensity is avoided.
In an alternative embodiment, the operating parameter values of the compressor may include one or more of an operating current of the compressor, a body temperature of the compressor, and a body pressure of the compressor.
The running current, the machine body temperature and the machine body pressure of the compressor can effectively reflect the intensity of the pressure inside the compressor.
That is, the higher the operating current or the body temperature or the body pressure, the higher the intensity of the compressor internal pressure.
In specific implementation, the running current of the compressor belongs to the electric signal of the compressor and can be directly collected.
The body temperature of the compressor may be acquired by providing a temperature sensor, such as an NTC (Negative Temperature Coefficient ) thermistor sensor, at a certain location of the compressor body.
The body pressure of the compressor can be acquired by arranging a pressure sensor at a certain position of the body of the compressor.
In one embodiment, by detecting the operating current of the compressor in real time, when the operating current exceeds a preset current threshold, it is indicated that the internal pressure intensity of the compressor is already high at this time because of long-time operation, and the process of executing step 101 is triggered.
It should be noted that, if the operation parameter value of the compressor does not exceed the first preset parameter value, it is indicated that the pressure intensity inside the compressor is moderate, and even if the frequency adjustment is performed in response to the frequency adjustment command issued by the upper computer, the problem of protecting the compressor is not caused, so that in this case, the operation frequency of the compressor can be adjusted to the target frequency indicated by the frequency adjustment command according to the received frequency adjustment command.
Further, if no frequency adjustment command is issued, the operation can be continued according to the current operation frequency.
In the embodiment of the application, the target frequency indicated by the frequency adjustment command is an operation frequency dynamically determined by the equipment according to actual requirements, indicates the compressor frequency required by the operation of the equipment, is an instruction issued by a software program of an upper computer of the equipment, and has no direct relation with the moment compensation frequency and the first frequency value.
Taking a heat pump type clothes dryer as an example, in a clothes drying process, if it is detected that the temperature of air in the drying drum exceeds a limit value, damage may be caused to the clothes, then an operation frequency required for the compressor is calculated according to a target temperature, and a frequency adjustment command is generated based on the calculated operation frequency.
It is also assumed that it is possible to lengthen the laundry drying time by detecting that the air temperature in the drying drum is lower than the target temperature, and then calculating a target operating frequency based on the target temperature and the current operating frequency of the compressor, thereby generating a frequency adjustment command using the target operating frequency.
It will be appreciated that the above-mentioned generation of the frequency adjustment command according to temperature is only an exemplary illustration, and besides the frequency adjustment according to temperature, the frequency adjustment command may be triggered by the condensation temperature of the heat pump cycle in various manners, which does not limit the scheme of the present application.
For the process of reducing the operating frequency of the compressor to the first frequency value based on the torque compensation frequency in step 101, in an alternative embodiment, the frequency reduction amplitude of the compressor may be defined by setting a preset threshold value to ensure the effect of the reduction of the internal pressure of the compressor. That is, the difference between the first frequency value and the torque compensation frequency is less than a preset threshold.
For example, assuming that the compressor is operated at 100Hz and the torque compensation frequency is 50Hz, the preset threshold is 10Hz, the first frequency value is less than or equal to 60Hz, that is, the compressor frequency of 100Hz is reduced to below 60Hz and above 50 Hz.
Based on the two embodiments, as long as the operating frequency of the compressor is reduced to a frequency value above the torque compensation frequency, the current compensation mechanism is not triggered, so that the phenomenon of transient abrupt change of the current of the compressor is not caused, and the problem of compressor protection is not caused.
Step 102: the operating frequency of the compressor is maintained at the first frequency value for a preset period of operation.
The preset duration is a time for maintaining operation after the first stage of the frequency reduction of the step 101 is performed.
That is, if the first frequency value is equal to the frequency value of the torque compensation frequency, the compressor is operated continuously for a preset period of time according to the torque compensation frequency.
If the first frequency value is larger than the frequency value of the moment compensation frequency, the compressor is enabled to continuously operate for a preset time according to the first frequency value.
It is noted that in the operation time period of the preset duration, since the operation frequency of the compressor is always above the torque compensation frequency, the current compensation mechanism is not triggered, so that the phenomenon of transient abrupt change of the current of the compressor is not caused, and the problem of protecting the compressor is not caused.
At the same time, during this period of operation, the pressure intensity inside the compressor will also decrease slowly due to the decrease in the operating frequency of the compressor, and the current of the compressor will also decrease slowly.
Step 103: the operating frequency of the compressor is reduced to a second frequency value.
Wherein the second frequency value is a preset lower frequency which is smaller than the moment compensation frequency, and the pressure intensity inside the compressor can be thoroughly reduced by reducing the operation frequency of the compressor to the second frequency value.
It will be appreciated that the frequency-reducing phase of step 101 may be referred to as a first frequency-reducing phase, in which the operating frequency of the compressor is reduced to be higher than the torque compensation frequency and is maintained for a period of time, so that a buffer reducing time is provided for the pressure inside the compressor, and the operating current of the compressor is gradually reduced along with the reduction of the pressure; the down-conversion stage of step 103 may be referred to as a second down-conversion stage, in which the operating frequency of the compressor is continuously reduced to a lower frequency, which may allow the pressure inside the compressor to be further reduced.
It should be noted that when the operating frequency of the compressor is reduced to the second frequency value, since the pressure inside the compressor has been reduced slowly in the first frequency reducing stage, the operating current is reduced accordingly, and even if the current compensation mechanism is triggered because the operating frequency is below the torque compensation frequency, the transient abrupt change of the current of the compressor is not caused, so that the problem of protecting the compressor is not caused.
It should be noted that, in order to verify whether the internal pressure of the compressor actually decreases, after the operating frequency of the compressor is reduced to the second frequency value, the operating parameter value of the compressor may be obtained again, and the obtained operating parameter value may be compared with the second preset parameter value.
If the obtained operation parameter value is lower than the second preset parameter value, the pressure inside the compressor is indeed reduced, and no compressor protection problem is caused no matter the frequency is reduced or increased rapidly, so that the operation frequency of the compressor can be adjusted to the target frequency indicated by the frequency adjustment command according to the received frequency adjustment command.
If the obtained operation parameter value is not lower than the second preset parameter value, the pressure inside the compressor is not completely reduced, and the rapid frequency reduction or the rapid frequency increase is not suitable at the moment, so that the operation frequency of the compressor can be kept to be operated at the second frequency value until the operation parameter value of the compressor is lower than the second preset parameter value, and then the operation frequency of the compressor is regulated to the target frequency indicated by the frequency regulation command according to the received frequency regulation command.
As previously described, the operating parameter values of the compressor may include one or more of an operating current of the compressor, a body temperature of the compressor, and a body pressure of the compressor.
The running current, the machine body temperature and the machine body pressure of the compressor can effectively reflect the intensity of the pressure inside the compressor, and the higher the running current, the machine body temperature or the machine body pressure is, the higher the intensity of the pressure inside the compressor is.
It is noted that the second preset parameter value is a preset operation parameter threshold value for representing that the internal pressure of the compressor is relatively low, and because the first preset parameter value is a preset self-adaptive frequency-reducing trigger threshold value, the compressor indicates that the internal pressure intensity of the compressor is relatively high under the condition of the first preset parameter value, and therefore the second preset parameter value is smaller than the first preset parameter value.
As mentioned above, the target frequency indicated by the frequency adjustment command is an operating frequency dynamically determined by the device according to the actual requirement, and there is no direct relation between the moment compensation frequency, the first frequency value and the second frequency value. Generally, the frequency adjustment command indicates a target frequency greater than the aforementioned second frequency value.
The above-mentioned compressor frequency control flow shown in fig. 1 is completed, by reducing the operating frequency of the compressor to a first frequency value greater than or equal to the torque compensation frequency, and keeping the operating frequency of the compressor at the first frequency value for a preset period of time, so that the pressure of the compressor gradually decreases in the time period of the preset period of time, but the current compensation mechanism of the compressor is not triggered, and then reducing the operating frequency of the compressor to a second frequency value, so that the operating frequency of the compressor is reduced to a lower frequency, and meanwhile, the pressure of the compressor is also thoroughly reduced, thereby reducing the problem of compressor protection caused by too high frequency reduction speed and pressure unreduced.
Embodiment two:
the overall implementation of the compressor frequency control is explained below in connection with the embodiment shown in fig. 1 described above.
The overall implementation flowchart of the compressor frequency control as shown in fig. 2 includes the following steps:
step 1: the operation parameter value of the compressor is detected in real time.
Wherein the operating parameter value of the compressor may be indicative of the magnitude of the pressure intensity inside the compressor.
Alternatively, the operating parameter values of the compressor may include one or more of an operating current of the compressor, a body temperature of the compressor, and a body pressure of the compressor.
The running current, the machine body temperature and the machine body pressure of the compressor can effectively reflect the intensity of the pressure inside the compressor.
That is, the higher the operating current or the body temperature or the body pressure, the higher the intensity of the compressor internal pressure.
In specific implementation, the running current of the compressor belongs to the electric signal of the compressor and can be directly collected.
The body temperature of the compressor may be acquired by providing a temperature sensor (e.g., an NTC thermistor sensor) at a certain position of the compressor body.
The body pressure of the compressor can be acquired by arranging a pressure sensor at a certain position of the body of the compressor.
Step 2: and judging whether the detected operation parameter value is larger than a first preset parameter value, if so, executing the step 3, otherwise, executing the step 7.
The first preset parameter value is a preset self-adaptive frequency-reducing trigger threshold value. If the operation parameter value reaches a first preset parameter value, the pressure intensity in the compressor is larger, and a flow of adaptively reducing the frequency of the compressor based on the moment compensation frequency is triggered; if the operating parameter value of the compressor does not exceed the first preset parameter value, the pressure intensity inside the compressor is moderate.
Step 3: and reducing the operating frequency of the compressor to a first frequency value based on the torque compensation frequency, and keeping the operating frequency of the compressor at the first frequency value for a preset period of operation.
The moment compensation frequency is the compressor frequency triggering the compressor current compensation mechanism, is a relatively low compressor frequency, and when the operation frequency of the compressor is smaller than the moment compensation frequency, the compressor body vibration is aggravated because the compressor is operated at a low frequency, at the moment, the triggered current compensation mechanism dynamically determines a compensation current value according to the obtained compressor vibration quantity data, and then the compensation current value is compensated to the operation current of the compressor, so that the purpose of inhibiting the compressor vibration is achieved.
Optionally, the operating frequency of the compressor may be reduced to a first frequency value greater than or equal to the torque compensation frequency, so as to avoid triggering the current compensation mechanism and further cause a phenomenon of transient abrupt change of the current of the compressor.
In step 3, in the operation time period of the preset duration, since the operation frequency of the compressor is always above the torque compensation frequency, the current compensation mechanism is not triggered, and thus the phenomenon of transient abrupt change of the current of the compressor is not caused, and the problem of compressor protection is not caused.
At the same time, during this period of operation, the pressure intensity inside the compressor will also decrease slowly due to the decrease in the operating frequency of the compressor, and the current of the compressor will also decrease slowly.
Step 4: the operating frequency of the compressor is reduced to a second frequency value.
Wherein the second frequency value is a preset lower frequency which is smaller than the moment compensation frequency, and the pressure intensity inside the compressor can be thoroughly reduced by reducing the operation frequency of the compressor to the second frequency value.
It should be noted that when the operating frequency of the compressor is reduced to the second frequency value, since the pressure inside the compressor has been reduced slowly in the first frequency reducing stage, the operating current is reduced accordingly, and even if the current compensation mechanism is triggered because the operating frequency is below the torque compensation frequency, the transient abrupt change of the current of the compressor is not caused, so that the problem of protecting the compressor is not caused.
Step 5: and continuously detecting the operation parameter value of the compressor in real time.
For a relevant explanation of the values of the operating parameters, please refer to the relevant explanation of step 1 above.
Step 6: and judging whether the detected operation parameter value is smaller than a second preset parameter value, if so, executing the step 7, otherwise, executing the step 8.
The second preset parameter value is a preset operation parameter threshold value used for representing that the internal pressure of the compressor is relatively low, and the first preset parameter value is a preset self-adaptive frequency-reducing trigger threshold value, so that the compressor indicates that the internal pressure intensity of the compressor is relatively high under the condition of the first preset parameter value, and the second preset parameter value is smaller than the first preset parameter value.
Comparing the detected operation parameter value with a second preset parameter value, if the operation parameter value is smaller than the second preset parameter value, the pressure inside the compressor is indeed reduced, and no matter the operation parameter value is rapidly reduced or rapidly increased, no problem of compressor protection is caused; and if the operating parameter value is not less than the second preset parameter value, indicating that the pressure inside the compressor has not been completely reduced.
Step 7: and adjusting the operating frequency of the compressor to the target frequency indicated by the frequency adjustment command according to the received frequency adjustment command.
The target frequency indicated by the frequency adjustment command is an operating frequency dynamically determined by the equipment according to actual requirements, and no direct relation exists between the operating frequency and the moment compensation frequency.
Step 8: the operating frequency of the compressor is maintained at the second frequency value and the process returns to step 5.
If the operating parameter value is not lower than the second preset parameter value, the pressure inside the compressor is not completely reduced, and at the moment, the rapid frequency reduction or the rapid frequency increase is not suitable, so that the operating frequency of the compressor can be kept to be operated at the second frequency value until the operating parameter value of the compressor is lower than the second preset parameter value, and the operation frequency of the compressor is regulated to the target frequency indicated by the frequency regulation command according to the received frequency regulation command.
Thus, the overall implementation flow of the compressor frequency control shown in fig. 2 is completed.
The application also provides an embodiment of the compressor frequency control device corresponding to the embodiment of the compressor frequency control method.
Fig. 3 is a schematic structural diagram of a compressor frequency control device according to an exemplary embodiment, where the device is configured to perform the compressor frequency control method provided in any one of the foregoing embodiments, and as shown in fig. 3, the compressor frequency control device includes:
a first frequency reducing module 310, configured to reduce an operation frequency of the compressor to a first frequency value based on the torque compensation frequency, and maintain the operation frequency of the compressor at the first frequency value for a preset period of time; the first frequency value is larger than or equal to the moment compensation frequency, and the moment compensation frequency is a compressor frequency triggering a compressor current compensation mechanism;
a second frequency down-conversion module 320 is configured to reduce the operating frequency of the compressor to a second frequency value.
In one possible implementation, the difference between the first frequency value and the torque compensation frequency is less than a preset threshold value.
In one possible implementation, the apparatus further comprises (not shown in fig. 3):
the trigger judging module is used for acquiring the operation parameter value of the compressor; and executing the process of the first down conversion module 310 in the case that the acquired operation parameter value exceeds the first preset parameter value.
In one possible implementation, the apparatus further comprises (not shown in fig. 3):
and the frequency modulation response module is used for adjusting the operating frequency of the compressor to the target frequency indicated by the frequency adjustment command according to the received frequency adjustment command under the condition that the operating parameter value of the compressor does not exceed the first preset parameter value.
In one possible implementation, the apparatus further comprises (not shown in fig. 3):
a verification module, configured to obtain an operation parameter value of the compressor after the second frequency-reducing module 320 reduces the operation frequency of the compressor to a second frequency value; executing the process of the frequency modulation response module according to the acquired operation parameter value being lower than a second preset parameter value; and according to the acquired operation parameter value not lower than a second preset parameter value, maintaining the operation frequency of the compressor to operate at the second frequency value.
In one possible implementation, the torque compensation frequency is between 45Hz and 55 Hz.
In one possible implementation, the operating parameter values of the compressor include one or more of an operating current of the compressor, a body temperature of the compressor, and a body pressure of the compressor.
The implementation process of the functions and roles of each unit in the above device is specifically shown in the implementation process of the corresponding steps in the above method, and will not be described herein again.
For the device embodiments, reference is made to the description of the method embodiments for the relevant points, since they essentially correspond to the method embodiments. The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purposes of the present application. Those of ordinary skill in the art will understand and implement the present application without undue burden.
The embodiment of the application also provides an electronic device corresponding to the compressor frequency control method provided by the previous embodiment, so as to execute the compressor frequency control method.
Fig. 4 is a hardware configuration diagram of an electronic device, which may be a heat pump type dryer or a heat pump type air conditioner set, according to an exemplary embodiment, including: a communication interface 601, a processor 602, a memory 603 and a bus 604; wherein the communication interface 601, the processor 602 and the memory 603 perform communication with each other via a bus 604. The processor 602 may perform the compressor frequency control method described above by reading and executing machine executable instructions in the memory 603 corresponding to the control logic of the compressor frequency control method, the details of which are referred to in the above embodiments and will not be further described herein.
The memory 603 referred to herein may be any electronic, magnetic, optical, or other physical storage device that may contain stored information, such as executable instructions, data, or the like. In particular, the memory 603 may be RAM (Random Access Memory ), flash memory, a storage drive (e.g., hard drive), any type of storage disk (e.g., optical disk, DVD, etc.), or a similar storage medium, or a combination thereof. The communication connection between the system network element and at least one other network element is achieved through at least one communication interface 601 (which may be wired or wireless), the internet, a wide area network, a local network, a metropolitan area network, etc. may be used.
Bus 604 may be an ISA bus, a PCI bus, an EISA bus, or the like. The buses may be classified as address buses, data buses, control buses, etc. The memory 603 is configured to store a program, and the processor 602 executes the program after receiving an execution instruction.
The processor 602 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuitry in hardware or instructions in software in the processor 602. The processor 602 may be a general purpose processor including a network processor (Network Processor, NP), digital Signal Processor (DSP), application Specific Integrated Circuit (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor.
The electronic equipment provided by the embodiment of the application and the compressor frequency control method provided by the embodiment of the application have the same beneficial effects as the method adopted, operated or realized by the electronic equipment and the compressor frequency control method provided by the embodiment of the application are in the same application conception.
The embodiment of the present application further provides a computer readable storage medium corresponding to the compressor frequency control method provided in the foregoing embodiment, referring to fig. 5, the computer readable storage medium is shown as an optical disc 30, on which a computer program (i.e. a program product) is stored, where the computer program, when executed by a processor, performs the compressor frequency control method provided in any of the foregoing embodiments.
It should be noted that examples of the computer readable storage medium may also include, but are not limited to, a phase change memory (PRAM), a Static Random Access Memory (SRAM), a Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), a Read Only Memory (ROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a flash memory, or other optical or magnetic storage medium, which will not be described in detail herein.
The computer readable storage medium provided by the above embodiment of the present application has the same advantageous effects as the method adopted, operated or implemented by the application program stored therein, for the same inventive concept as the compressor frequency control method provided by the embodiment of the present application.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the application.
Claims (10)
1. A method of controlling a compressor frequency, the method comprising:
reducing an operating frequency of the compressor to a first frequency value based on a torque compensation frequency, the first frequency value being greater than or equal to the torque compensation frequency, the torque compensation frequency being a compressor frequency that triggers a compressor current compensation mechanism;
maintaining the operating frequency of the compressor at a first frequency value for a preset duration of operation;
and reducing the operating frequency of the compressor to a second frequency value.
2. The method of claim 1, wherein a difference between the first frequency value and the torque compensation frequency is less than a preset threshold.
3. The method of claim 1, wherein the method further comprises:
acquiring an operation parameter value of the compressor;
and executing the step of reducing the operating frequency of the compressor to a first frequency value based on the torque compensation frequency under the condition that the acquired operating parameter value exceeds the first preset parameter value.
4. A method as claimed in claim 3, wherein the method further comprises:
and under the condition that the operation parameter value of the compressor does not exceed a first preset parameter value, adjusting the operation frequency of the compressor to a target frequency indicated by the frequency adjustment command according to the received frequency adjustment command.
5. The method of claim 1, wherein the method further comprises:
after the operation frequency of the compressor is reduced to a second frequency value, obtaining an operation parameter value of the compressor;
when the acquired operation parameter value is lower than a second preset parameter value, adjusting the operation frequency of the compressor to a target frequency indicated by the frequency adjustment command according to the received frequency adjustment command; or alternatively, the process may be performed,
and under the condition that the acquired operation parameter value is not lower than a second preset parameter value, the operation frequency of the compressor is kept to be operated at the second frequency value.
6. The method of any of claims 3-5, wherein the operating parameter values of the compressor include one or more of an operating current of the compressor, a body temperature of the compressor, and a body pressure of the compressor.
7. A method according to any one of claims 1-5, wherein the torque compensation frequency is between 45Hz and 55 Hz.
8. A compressor frequency control apparatus, said apparatus comprising:
the first frequency reducing module is used for reducing the operation frequency of the compressor to a first frequency value based on the moment compensation frequency and keeping the operation frequency of the compressor at the first frequency value for a preset operation duration; the torque compensation frequency is a compressor frequency triggering a compressor current compensation mechanism;
and the second frequency reducing module is used for reducing the operating frequency of the compressor to a second frequency value.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to perform the steps of the method of any one of claims 1-7.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the steps of the method according to any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310764317.1A CN116971161A (en) | 2023-06-27 | 2023-06-27 | Compressor frequency control method, device, equipment and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310764317.1A CN116971161A (en) | 2023-06-27 | 2023-06-27 | Compressor frequency control method, device, equipment and storage medium |
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| CN116971161A true CN116971161A (en) | 2023-10-31 |
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| CN202310764317.1A Pending CN116971161A (en) | 2023-06-27 | 2023-06-27 | Compressor frequency control method, device, equipment and storage medium |
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| Country | Link |
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| CN (1) | CN116971161A (en) |
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