CN114777323A

CN114777323A - Control method and control device of air conditioner, air conditioner and storage medium

Info

Publication number: CN114777323A
Application number: CN202210527258.1A
Authority: CN
Inventors: 邓立发; 龙志强; 符雪平
Original assignee: GD Midea Air Conditioning Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-07-22

Abstract

The invention provides a control method and a control device of an air conditioner, the air conditioner and a storage medium, wherein the air conditioner comprises a compressor provided with an airflow pipeline, and the method comprises the following steps: acquiring a reference stress value of an airflow pipeline during the operation of the compressor, and acquiring the current operation frequency of the compressor, namely a first operation frequency when the reference stress value is greater than or equal to a preset stress threshold value; acquiring a second operating frequency, wherein the absolute value of the difference between the second operating frequency and the reference natural frequency is greater than the absolute value of the difference between the first operating frequency and the reference natural frequency, and the reference natural frequency is the natural frequency of the airflow pipeline; the operating frequency of the compressor is adjusted to a second operating frequency to avoid resonance of the gas flow conduit and the compressor. According to the invention, under the condition that the reference stress value is greater than or equal to the preset stress threshold value, the running speed of the compressor is adjusted to avoid resonance of the compressor and the airflow pipeline, so that timely maintenance of the airflow pipeline with high fatigue fracture risk is realized.

Description

Control method and control device of air conditioner, air conditioner and storage medium

Technical Field

The invention relates to the technical field of air conditioners, in particular to a control method and a control device of an air conditioner, the air conditioner and a storage medium.

Background

The air flow pipeline is a key part in the variable frequency air conditioner, and the consistency of the air flow pipeline produced in large batch on the market is difficult to control, and the use scene of the variable frequency air conditioner is complex and changeable, so that the difference between the piping stress and the stress data in the development stage during actual use exists, and the hidden danger of pipe breakage accidents caused by the rapid increase of the stress exists. In the related art, a finished grade S-N curve of a piping is obtained; respectively acquiring a first cycle number and a second cycle number of the airflow pipeline on the basis of an S-N curve of a piping finished grade; establishing an airflow pipeline fatigue life calculation model; and on the basis of the acquired first cycle times and second cycle times, the fatigue life of the airflow pipelines in batch is estimated by combining an airflow pipeline fatigue life calculation model, and the airflow pipelines with higher fatigue fracture risks cannot be maintained in time, so that the potential safety hazard of the air conditioner is higher.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a control method and a control device of an air conditioner, the air conditioner and a storage medium, and the air flow pipeline with a high fatigue fracture risk can be maintained in time.

In a first aspect, an embodiment of the present invention provides a method for controlling an air conditioner, where the air conditioner includes a compressor, the compressor is provided with an airflow pipeline, and the method for controlling the air conditioner includes:

when the compressor is in a working state, acquiring a reference stress value of the airflow pipeline, and when the reference stress value is greater than or equal to a preset stress threshold value, acquiring a first operating frequency, wherein the first operating frequency is the current operating frequency of the compressor;

acquiring a second operating frequency, wherein the absolute value of the difference between the second operating frequency and a reference natural frequency is greater than the absolute value of the difference between the first operating frequency and the reference natural frequency, and the reference natural frequency is the natural frequency of the airflow pipeline;

adjusting the operating frequency of the compressor to the second operating frequency to avoid resonance of the airflow conduit and the compressor.

The control method of the air conditioner provided by the embodiment of the invention at least has the following beneficial effects: firstly, during the operation of a compressor, a reference stress value of an airflow pipeline is obtained, the reference stress value is compared with a preset stress threshold value, and when the reference stress value is greater than or equal to the preset stress threshold value, a first operation frequency is obtained; then, acquiring a second operating frequency, wherein the absolute value of the difference between the second operating frequency and the reference natural frequency is greater than the absolute value of the difference between the first operating frequency and the reference natural frequency, and the reference natural frequency is the natural frequency of the airflow pipeline; then, the current operating frequency of the compressor is adjusted to a second operating frequency. According to the technical scheme of the embodiment of the invention, firstly, a reference stress value of an airflow pipeline is obtained when a compressor is in a working state, and when the reference stress value is greater than or equal to a preset stress threshold value, a first running frequency, namely the current running frequency of the compressor, is obtained; and then, acquiring a second operating frequency, wherein the absolute value of the difference between the second operating frequency and the reference natural frequency is greater than the absolute value of the difference between the first operating frequency and the reference natural frequency, the reference natural frequency is the natural frequency of the airflow pipeline, and the current operating frequency of the compressor is adjusted to be the second operating frequency so as to avoid the resonance between the airflow pipeline and the compressor, reduce the reference stress value of the airflow pipeline and effectively reduce the risk of fatigue fracture of the airflow pipeline.

According to some embodiments of the invention, the gas flow duct comprises at least one return gas duct and at least one exhaust gas duct, and the obtaining a first operating frequency when the reference stress value is greater than or equal to a preset stress threshold value comprises:

acquiring a return air reference stress value of each return air pipeline;

acquiring an exhaust reference stress value of each exhaust pipeline;

and when at least one air return reference stress value and/or at least one exhaust reference stress value is larger than or equal to the preset stress threshold value, acquiring the first operating frequency.

The preset stress threshold value is a judgment standard for judging whether the return air reference stress value and the exhaust gas reference stress value are abnormal or not, under the condition that the airflow pipeline comprises at least one return air pipeline and at least one exhaust pipeline, the return air reference stress value of each return air pipeline and the exhaust gas reference stress value of each exhaust pipeline are obtained, when the at least one return air reference stress value and/or the at least one exhaust gas reference stress value are/is larger than or equal to the preset stress threshold value, the fact that the airflow pipeline has the risk of fatigue fracture is shown, under the condition, the first operating frequency is obtained, and a data basis is provided for obtaining the second operating frequency subsequently. It can be understood that the triggering condition provided by the embodiment for acquiring the first operating frequency provides a corresponding maintenance measure when the stress value of the at least one return air duct and/or the at least one exhaust air duct exceeds the preset stress threshold value, so as to ensure the healthy and stable operation of the air conditioning system.

According to some embodiments of the present invention, the airflow pipeline is provided with a strain gauge, the strain gauge is used for acquiring a transverse stress value and a longitudinal stress value of the airflow pipeline, the air conditioner further includes a stress acquisition module, the stress acquisition module is connected to the strain gauge, and the acquiring of the reference stress value of the airflow pipeline includes:

and inputting the transverse stress value and the longitudinal stress value into the stress acquisition module so that the stress acquisition module determines the reference stress value according to the transverse stress value, the longitudinal stress value and a preset reference stress direction.

The method is characterized in that a strain gauge is arranged on the airflow pipeline, and the transverse stress value and the longitudinal stress value obtained from the strain gauge are input into a stress acquisition module, so that the transverse stress value and the longitudinal stress value are synthesized to obtain the maximum main stress of the airflow pipeline, namely a reference stress value, and an effective data basis is provided for monitoring the stress condition of the airflow pipeline.

According to some embodiments of the invention, the air conditioner further comprises a display module, and after the obtaining the reference stress value of the airflow pipeline, the method further comprises:

when the reference stress value is larger than or equal to a preset stress threshold value, generating early warning information;

and sending the early warning information to the display module for displaying.

It can be understood that when the reference stress value is detected to be greater than or equal to the preset stress threshold value, the risk of fatigue fracture of the airflow pipeline is represented, early warning information is generated and sent to the display module to be displayed, a user can be prompted that potential safety hazards exist in the current air conditioner, and therefore the air conditioner can be maintained timely.

According to some embodiments of the invention, prior to said obtaining the second operating frequency, the method further comprises:

acquiring at least two selectable natural frequencies;

determining the reference natural frequency from at least two of the selectable natural frequencies, wherein the reference natural frequency is the selectable natural frequency with the smallest value of the difference with the first operating frequency.

The gas flow pipeline is correspondingly provided with at least two selectable natural frequencies, and the selectable natural frequency with the minimum frequency difference value with the first operation frequency is selected from the at least two selectable natural frequencies as the reference natural frequency, so that an effective data base is provided for acquiring the second operation frequency.

According to some embodiments of the invention, the obtaining the second operating frequency comprises:

acquiring a preset frequency adjustment value;

and when the reference natural frequency is greater than the first operating frequency, determining the difference between the first operating frequency and the adjustment value as the second operating frequency, or when the reference natural frequency is less than the first operating frequency, determining the sum of the first operating frequency and the adjustment value as the second operating frequency.

The method comprises the steps of acquiring a preset frequency adjustment value under the condition that a reference stress value of an airflow pipeline is detected to be larger than a preset stress threshold value, comparing the reference natural frequency with a first operation frequency, determining a difference value between the first operation frequency and the adjustment value as a second operation frequency when the reference natural frequency is larger than the first operation frequency, or determining a sum of the first operation frequency and the adjustment value as the second operation frequency when the reference natural frequency is smaller than the first operation frequency, so as to acquire the second operation frequency far away from the reference natural frequency as a new compressor operation frequency, so as to avoid resonance of a compressor and the airflow pipeline and reduce the risk of fatigue fracture of the airflow pipeline.

According to some embodiments of the invention, the air conditioner is in communication connection with a remote end, and the obtaining the second operating frequency comprises:

sending the first operating frequency to the remote end so that the remote end determines the second operating frequency according to the reference natural frequency, the first operating frequency and a preset frequency adjustment value, wherein when the reference natural frequency is greater than the first operating frequency, the second operating frequency is a difference between the first operating frequency and the frequency adjustment value, or when the reference natural frequency is less than the first operating frequency, the second operating frequency is a sum of the first operating frequency and the frequency adjustment value;

and acquiring the second operating frequency fed back by the remote end.

The air conditioner is in communication connection with a remote end, the generation of the second operating frequency can be executed at the remote end, the remote end determines the second operating frequency according to the reference natural frequency, the first operating frequency and a preset frequency adjusting value, and when the reference natural frequency is greater than the first operating frequency, the second operating frequency is the difference between the first operating frequency and the frequency adjusting value, or when the reference natural frequency is less than the first operating frequency, the second operating frequency is the sum of the first operating frequency and the frequency adjusting value; and the air conditioner acquires a second operating frequency fed back by the remote end. It can be understood that the distributed configuration can ensure the realizability of the air conditioner control method provided by this embodiment, and can also implement the unified control of the remote end on multiple air conditioners under the condition that the remote end is in communication connection with multiple air conditioners.

According to some embodiments of the invention, after the transmitting the first operating frequency to the remote end, the method further comprises:

and sending the reference stress value to the remote end, so that the remote end determines a reference natural frequency from at least two selectable natural frequencies under the condition that the reference stress value is determined to be greater than or equal to the preset stress threshold, wherein the reference natural frequency is the selectable natural frequency with the smallest value with the first operation frequency difference.

After the air conditioner sends the first operating frequency to the remote end, the air conditioner sends the reference stress value to the remote end, so that the remote end determines the reference natural frequency from at least two optional natural frequencies under the condition that the reference stress value is determined to be larger than or equal to the preset stress threshold value, and an effective data base is provided for the subsequent remote end to determine the second operating frequency according to the reference natural frequency and the first operating frequency.

According to some embodiments of the invention, after the adjusting the operating frequency of the compressor to the second operating frequency, the method further comprises:

when the compressor is in a working state, acquiring a new reference stress value of the airflow pipeline, and when the new reference stress value is greater than or equal to a preset stress threshold value, acquiring a third operating frequency, wherein the absolute value of the difference value between the third operating frequency and the reference natural frequency is greater than the absolute value of the difference value between the second operating frequency and the reference natural frequency;

adjusting the operating frequency of the compressor to the third operating frequency to avoid resonance of the airflow conduit and the compressor.

After the operating frequency of the compressor is adjusted to a second operating frequency, whether a new reference stress value of the current airflow pipeline reaches the standard needs to be detected, and when the new reference stress value is smaller than a preset stress threshold value, the operating state of the airflow pipeline is determined to be normal; when the new reference stress value is larger than or equal to the preset stress threshold value, the risk of fatigue fracture of the airflow pipeline is indicated, and under the condition, a third operating frequency is obtained, wherein the absolute value of the difference value between the third operating frequency and the reference natural frequency is larger than the absolute value of the difference value between the second operating frequency and the reference natural frequency; and adjusting the operating frequency of the compressor to a third operating frequency to realize timely maintenance of the airflow pipeline and avoid resonance between the airflow pipeline and the compressor.

In a second aspect, an embodiment of the present invention provides a control apparatus for an air conditioner, including at least one control processor and a memory communicatively connected to the at least one control processor; the memory stores instructions executable by the at least one control processor to enable the at least one control processor to perform the method of controlling an air conditioner as set forth in the first aspect above.

The control device of the air conditioner provided by the embodiment of the invention at least has the following beneficial effects: firstly, during the operation of a compressor, acquiring a reference stress value of an airflow pipeline, comparing the reference stress value with a preset stress threshold value, and acquiring a first operation frequency when the reference stress value is greater than or equal to the preset stress threshold value; then, acquiring a second operating frequency, wherein the absolute value of the difference between the second operating frequency and the reference natural frequency is greater than the absolute value of the difference between the first operating frequency and the reference natural frequency, and the reference natural frequency is the natural frequency of the airflow pipeline; then, the current operating frequency of the compressor is adjusted to a second operating frequency. According to the technical scheme of the embodiment of the invention, firstly, a reference stress value of an airflow pipeline is obtained when a compressor is in a working state, and when the reference stress value is greater than or equal to a preset stress threshold value, a first operating frequency, namely the current operating frequency of the compressor, is obtained; and then, acquiring a second operating frequency, wherein the absolute value of the difference between the second operating frequency and the reference natural frequency is greater than the absolute value of the difference between the first operating frequency and the reference natural frequency, the reference natural frequency is the natural frequency of the airflow pipeline, and the current operating frequency of the compressor is adjusted to the second operating frequency so as to avoid the resonance between the airflow pipeline and the compressor, so that the state of the airflow pipeline can be monitored in real time, and the risk of fatigue fracture of the airflow pipeline is reduced.

In a third aspect, an embodiment of the present invention provides an air conditioner, including the control device of the air conditioner as described in the second aspect.

The air conditioner provided by the embodiment of the invention has at least the following beneficial effects: firstly, acquiring a reference stress value of an airflow pipeline during the operation of a compressor, comparing the reference stress value with a preset stress threshold value, and acquiring a first operation frequency when the reference stress value is greater than or equal to the preset stress threshold value; then, acquiring a second operating frequency, wherein the absolute value of the difference between the second operating frequency and the reference natural frequency is greater than the absolute value of the difference between the first operating frequency and the reference natural frequency, and the reference natural frequency is the natural frequency of the airflow pipeline; then, the current operating frequency of the compressor is adjusted to a second operating frequency. According to the technical scheme of the embodiment of the invention, firstly, a reference stress value of an airflow pipeline is obtained when a compressor is in a working state, and when the reference stress value is greater than or equal to a preset stress threshold value, a first operating frequency, namely the current operating frequency of the compressor, is obtained; and then, acquiring a second operating frequency, wherein the absolute value of the difference between the second operating frequency and the reference natural frequency is greater than the absolute value of the difference between the first operating frequency and the reference natural frequency, the reference natural frequency is the natural frequency of the airflow pipeline, and the current operating frequency of the compressor is adjusted to the second operating frequency so as to avoid the resonance between the airflow pipeline and the compressor, so that the state of the airflow pipeline can be monitored in real time, and the risk of fatigue fracture of the airflow pipeline is reduced.

In a fourth aspect, embodiments of the present invention provide a computer-readable storage medium storing computer-executable instructions for performing the method of controlling an air conditioner according to the first aspect.

The computer-readable storage medium according to the embodiment of the invention has at least the following advantages: firstly, acquiring a reference stress value of an airflow pipeline during the operation of a compressor, comparing the reference stress value with a preset stress threshold value, and acquiring a first operation frequency when the reference stress value is greater than or equal to the preset stress threshold value; then, acquiring a second operating frequency, wherein the absolute value of the difference between the second operating frequency and the reference natural frequency is greater than the absolute value of the difference between the first operating frequency and the reference natural frequency, and the reference natural frequency is the natural frequency of the airflow pipeline; then, the current operating frequency of the compressor is adjusted to a second operating frequency. According to the technical scheme of the embodiment of the invention, firstly, a reference stress value of an airflow pipeline is obtained when a compressor is in a working state, and when the reference stress value is greater than or equal to a preset stress threshold value, a first running frequency, namely the current running frequency of the compressor, is obtained; and then, acquiring a second operating frequency, wherein the absolute value of the difference between the second operating frequency and the reference natural frequency is greater than the absolute value of the difference between the first operating frequency and the reference natural frequency, the reference natural frequency is the natural frequency of the airflow pipeline, and the current operating frequency of the compressor is adjusted to the second operating frequency, so that the airflow pipeline and the compressor are prevented from resonating, the state of the airflow pipeline can be monitored in real time, and the risk of fatigue fracture of the airflow pipeline is reduced.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.

Fig. 1 is a flowchart illustrating steps of a method for controlling an air conditioner according to an embodiment of the present invention;

FIG. 2 is a flowchart illustrating the steps for obtaining a first operating frequency when a reference stress value is greater than or equal to a predetermined stress threshold according to another embodiment of the present invention;

FIG. 3 is a flowchart illustrating the steps for obtaining a reference stress value for an airflow conduit according to another embodiment of the present invention;

fig. 4 is a flowchart illustrating steps of a method for controlling an air conditioner according to another embodiment of the present invention;

fig. 5 is a flowchart illustrating steps of a method for controlling an air conditioner according to another embodiment of the present invention;

FIG. 6 is a flowchart illustrating steps provided by another embodiment of the present invention for obtaining a second operating frequency;

FIG. 7 is a flowchart illustrating steps for obtaining a second operating frequency according to another embodiment of the present invention;

fig. 8 is a flowchart illustrating steps of a method for controlling an air conditioner according to another embodiment of the present invention;

fig. 9 is a flowchart illustrating steps of a method for controlling an air conditioner according to another embodiment of the present invention;

fig. 10 is a block diagram of a control apparatus of an air conditioner according to another embodiment of the present invention;

fig. 11 is a schematic structural view of a compressor according to another embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a strain gage provided in accordance with another embodiment of the present invention;

fig. 13 is an overall flowchart of a control method of an air conditioner according to another embodiment of the present invention;

FIG. 14 is a stress plot of the gas flow lines at a compressor operating frequency of 45Hz according to another embodiment of the present invention;

FIG. 15 is a stress plot of the gas flow conduits at a compressor operating frequency of 43Hz in accordance with another embodiment of the present invention;

fig. 16 is a block diagram of a control device of an air conditioner according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings only for the convenience of description of the present invention and simplification of the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and greater than, less than, more than, etc. are understood as excluding the essential numbers, and greater than, less than, etc. are understood as including the essential numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

The airflow pipeline is a key part in the variable frequency air conditioner, and the consistency of the airflow pipeline produced in large batch on the market is difficult to control, the use scene of the variable frequency air conditioner is complex and changeable, so that the difference between the piping stress and the stress data in the development stage during actual use exists, and the hidden danger of pipe breakage accidents caused by the sharp increase of the stress exists. In the related art, a finished grade S-N curve of a piping is obtained; respectively acquiring a first cycle number and a second cycle number of the airflow pipeline on the basis of an S-N curve of a piping finished grade; establishing an air flow pipeline fatigue life calculation model; and on the basis of the acquired first cycle times and second cycle times, the fatigue life of the airflow pipelines in batch is estimated by combining an airflow pipeline fatigue life calculation model, and the airflow pipelines with higher fatigue fracture risks cannot be maintained in time, so that the potential safety hazard of the air conditioner is higher.

Based on the above situation, an embodiment of the present invention provides a control method, a control device, an air conditioner, and a storage medium for an air conditioner, where the air conditioner includes a compressor, the compressor is provided with an airflow pipeline, and the control method for the air conditioner includes: when the compressor is in a working state, acquiring a reference stress value of the airflow pipeline, and when the reference stress value is greater than or equal to a preset stress threshold value, acquiring a first operating frequency, wherein the first operating frequency is the current operating frequency of the compressor; acquiring a second operating frequency, wherein the absolute value of the difference between the second operating frequency and the reference natural frequency is greater than the absolute value of the difference between the first operating frequency and the reference natural frequency, and the reference natural frequency is the natural frequency of the airflow pipeline; the operating frequency of the compressor is adjusted to a second operating frequency to avoid resonance of the gas flow conduit and the compressor. According to the technical scheme of the embodiment of the invention, firstly, during the operation of the compressor, a reference stress value of the airflow pipeline is obtained, the reference stress value is compared with a preset stress threshold value, and when the reference stress value is greater than or equal to the preset stress threshold value, a first operation frequency is obtained; then, acquiring a second operating frequency, wherein the absolute value of the difference between the second operating frequency and the reference natural frequency is greater than the absolute value of the difference between the first operating frequency and the reference natural frequency, and the reference natural frequency is the natural frequency of the airflow pipeline; then, the current operating frequency of the compressor is adjusted to a second operating frequency. According to the technical scheme of the embodiment of the invention, firstly, a reference stress value of an airflow pipeline is obtained when a compressor is in a working state, and when the reference stress value is greater than or equal to a preset stress threshold value, a first running frequency, namely the current running frequency of the compressor, is obtained; and then, acquiring a second operating frequency, wherein the absolute value of the difference between the second operating frequency and the reference natural frequency is greater than the absolute value of the difference between the first operating frequency and the reference natural frequency, the reference natural frequency is the natural frequency of the airflow pipeline, and the current operating frequency of the compressor is adjusted to the second operating frequency, so that the airflow pipeline and the compressor are prevented from resonating, the state of the airflow pipeline can be monitored in real time, and the risk of fatigue fracture of the airflow pipeline is reduced.

The embodiments of the present invention will be further explained with reference to the drawings.

As shown in fig. 1, fig. 1 is a flowchart illustrating steps of a control method of an air conditioner according to an embodiment of the present invention. The air conditioner includes a compressor provided with an air flow pipe, and a control method of the air conditioner includes, but is not limited to, step S110, step S120 and step S130.

Step S110, acquiring a reference stress value of the airflow pipeline when the compressor is in a working state, and acquiring a first operating frequency when the reference stress value is greater than or equal to a preset stress threshold value, wherein the first operating frequency is the current operating frequency of the compressor;

step S120, acquiring a second operating frequency, wherein the absolute value of the difference between the second operating frequency and the reference natural frequency is greater than the absolute value of the difference between the first operating frequency and the reference natural frequency, and the reference natural frequency is the natural frequency of the airflow pipeline;

step S130, adjusting the operating frequency of the compressor to a second operating frequency to avoid resonance between the airflow pipeline and the compressor.

It is understood that the stress is an internal force which generates interaction between parts in the object when the object is deformed due to external factors (stress, humidity, temperature field change and the like), and the object has a risk of damage if the long-term stress value is too large. The gas flow pipeline is connected with the compressor, the compressor is a moving part, the gas flow pipeline can vibrate along with the compressor during the operation of the compressor, so that stress is generated on the gas flow pipeline, natural frequency exists in the gas flow pipeline due to the structural shape, the pipeline quality and the like, resonance can be generated between the gas flow pipeline and the compressor under the condition that the natural frequency of the gas flow pipeline is close to the operation frequency of the compressor, so that the stress value of the gas flow pipeline rises, and when the stress value of the gas flow pipeline exceeds a preset stress threshold value, the risk of fatigue fracture of the gas flow pipeline is indicated.

Therefore, when the compressor is in a working state, the stress condition of the airflow pipeline can be judged by obtaining a reference stress value of the airflow pipeline, the embodiment of the invention compares the obtained reference stress value with a preset stress threshold value, wherein the preset stress threshold value is a critical value of the airflow pipeline in a safe operation state, namely a safety early warning value, when the reference stress value is detected to be greater than or equal to the preset stress threshold value, the current airflow pipeline is likely to generate resonance with the compressor, and the airflow pipeline has a risk of fatigue fracture, in this case, a first operation frequency is obtained, a second operation frequency far away from the reference natural frequency of the airflow pipeline is obtained based on the first operation frequency, and the current operation frequency of the compressor is adjusted to the second operation frequency, so that the operation frequency of the compressor is far away from the reference natural frequency of the airflow pipeline, the condition that the stress value of the airflow pipeline rises due to the resonance of the airflow pipeline and the compressor is avoided, and therefore the risk of fatigue fracture of the airflow pipeline is avoided. Compared with the technical scheme that the fatigue life of the airflow pipeline can only be estimated and timely maintenance of the airflow pipeline with high fatigue fracture risk cannot be realized in the related technology, the technical scheme provided by the embodiment of the invention can monitor the stress condition of the airflow pipeline by acquiring the reference stress value of the airflow pipeline and comparing the reference stress value with the preset stress threshold, and when the reference stress value is detected to be greater than the preset stress threshold, namely under the condition that the airflow pipeline has the fatigue fracture risk, the operation speed of the compressor is adjusted to the second operation frequency, wherein the second operation frequency is far away from the reference natural frequency of the airflow pipeline, so that the compressor and the airflow pipeline are prevented from resonating, the reference stress value of the airflow pipeline is reduced, and the fatigue fracture risk of the airflow pipeline is effectively reduced.

It should be noted that the embodiment does not limit the execution subject of the method step of obtaining the second operating frequency, and the execution subject may be executed in a controller at the air conditioner end, or may be implemented by a remote server, and a person skilled in the art may determine the method according to the actual operation realizability.

It should be noted that, in the embodiment of the present invention, the obtaining time of the reference stress value is not limited, but the operation mode of the air conditioner may be set to be the refrigeration mode, the temperature of the air conditioner is set to be 16 ℃, the wind speed of the air conditioner is set to be 100%, and after the air conditioner external unit is started to stably operate for 5 minutes, the reference stress value of the airflow pipeline is obtained; the reference stress value can also be obtained when the air conditioner is just awakened and does not run stably, and the technical personnel in the field can determine the reference stress value according to the actual requirement.

It should be noted that, in the embodiment of the present invention, the sampling frequency of the reference stress value is not limited, a preset sampling rate may be obtained, and the reference stress value is obtained according to the preset sampling rate, and the embodiment does not limit a specific numerical value of the sampling rate, and the sampling rate may be 1kS/s to obtain the reference stress value; the sampling may also be real-time sampling, and those skilled in the art may determine the sampling according to actual situations, which is not described herein.

In addition, as shown in fig. 2, fig. 2 is a flowchart of the steps of acquiring the first operating frequency when the reference stress value is greater than or equal to the preset stress threshold according to another embodiment of the present invention. The airflow pipeline includes at least one air return pipeline and at least one air exhaust pipeline, referring to fig. 11, fig. 11 is a schematic structural diagram of a compressor according to another embodiment of the present invention, the compressor 1100 includes a compressor body 1110 and a liquid storage tank 1120, the compressor body 1110 is provided with the air exhaust pipeline 1111, the liquid storage tank 1120 is provided with an air return pipeline 1121, and the method provided in the embodiment of fig. 2 corresponds to step S110 of the embodiment shown in fig. 1, including but not limited to step S210, step S220 and step S230.

Step S210, acquiring air return reference stress values of the air return pipelines;

step S220, acquiring an exhaust reference stress value of each exhaust pipeline;

step S230, when at least one of the return air reference stress values and/or at least one of the exhaust air reference stress values is greater than or equal to the preset stress threshold, obtaining the first operating frequency.

It should be noted that after acquiring the return air reference stress value of each return air pipeline and the exhaust gas reference stress value of each exhaust pipeline, the embodiment of the present invention does not limit the triggering condition for acquiring the first operating frequency, and may trigger the operation for acquiring the first operating frequency when the reference stress value of one of the air flow pipelines exceeds a preset stress threshold, or when the reference stress value of one of the return air pipelines exceeds a preset stress threshold, that is, when it is detected that any one of the air flow pipelines has a risk of fatigue fracture, so as to provide an effective data basis for subsequently acquiring the second operating frequency away from the reference natural frequency of the air flow pipeline, thereby adjusting the operating speed of the compressor to the second operating frequency, avoiding resonance between the compressor and the air flow pipeline, and reducing the reference stress value of the air flow pipeline to a value range smaller than the preset stress threshold, the reference stress value of each airflow pipeline is ensured to be in a safe state during the operation of the air conditioner, so that the operation safety of an air conditioning system is ensured; the first operating frequency may also be obtained when the reference stress values of all the airflow pipelines exceed a preset stress threshold.

It should be noted that, the specific number of the return air pipes and the exhaust air pipes in the compressor depends on the configuration of the air conditioner, and those skilled in the art can set the number according to actual needs, and the embodiments of the present invention are not limited herein.

In addition, as shown in fig. 3, fig. 3 is a flowchart of the steps of obtaining the reference stress value of the airflow pipeline according to another embodiment of the present invention. In the embodiment of fig. 3, the airflow duct is provided with a strain gauge, the strain gauge is used for acquiring a transverse stress value and a longitudinal stress value of the airflow duct, the air conditioner further includes a stress collecting module, and the stress collecting module is connected with the strain gauge, the method provided in the embodiment of fig. 3 corresponds to step S110 in the embodiment shown in fig. 1, and includes, but is not limited to, step S310.

And step S310, inputting the transverse stress value and the longitudinal stress value into a stress acquisition module so that the stress acquisition module determines a reference stress value according to the transverse stress value, the longitudinal stress value and a preset reference stress direction.

As shown in fig. 12, fig. 12 is a schematic structural diagram of a strain gauge according to another embodiment of the present invention, where the strain gauge 1200 of this embodiment is a bidirectional strain gauge, and is provided with a transverse strain channel 1210 and a longitudinal strain channel 1220, and the strain gauge 1200 is connected to a stress acquisition module through the transverse strain channel 1210 and the longitudinal strain channel 1220, so that the strain gauge 1200 transmits a transverse stress value acquired by the transverse strain channel 1210 and a longitudinal stress value acquired by the longitudinal strain channel 1220 to the stress acquisition module, so that the stress acquisition module determines a reference stress value according to the transverse stress value, the longitudinal stress value, and a preset reference stress direction, and provides an effective data basis for monitoring a stress condition of an airflow pipeline.

It should be noted that, the embodiment of the present invention does not limit the specific structure of the strain gauge, and the strain gauge may be a bidirectional strain gauge, or may also be a unidirectional strain gauge respectively arranged in the transverse direction and the longitudinal direction on the airflow pipeline, and those skilled in the art may select the strain gauge according to actual situations.

It should be noted that, in the embodiment of the present invention, the strain gauge is not limited to be disposed at a specific position of the airflow pipeline, and may be, as shown in fig. 11, the strain gauge is disposed at a bending position of the airflow pipeline (the exhaust pipeline 1111 or the return air pipeline 1121), and when the strain gauge selects a bidirectional strain gauge, a transverse stress value and a longitudinal stress value of the airflow pipeline may be obtained through the bidirectional strain gauge disposed at the bending position of the airflow pipeline, and the transverse stress value and the longitudinal stress value are input to the stress acquisition module, and a reference stress value in a preset reference stress direction is obtained through the stress acquisition module, where the reference stress direction in the embodiment is a stress direction in a bending position angular bisector direction, and it is well known by those skilled in the art how to obtain the reference stress value in the bending position angular bisector direction according to the transverse stress value and the longitudinal stress value, which will not be described herein, it can be understood that the bending position of the airflow pipeline is stressed maximally, the stress value is maximum, the risk of fatigue fracture is highest, and a more effective data basis is provided for monitoring the running state of the airflow pipeline; the strain gauge can also be arranged at the straight pipe of the airflow pipeline.

It should be noted that, the embodiment of the present invention does not limit the specific number of the strain gauges, and the specific number of the strain gauges depends on the number of bends of the airflow pipeline, and can be determined by a person skilled in the art according to actual situations.

In addition, as shown in fig. 4, fig. 4 is a flowchart illustrating steps of a control method of an air conditioner according to another embodiment of the present invention. For the control method of the air conditioner according to the embodiment of the present invention, wherein the air conditioner further includes a display module, after the reference stress value of the airflow pipeline is obtained in step S110 in the embodiment of fig. 1, the control method includes, but is not limited to, step S410 and step S420.

Step S410, when the reference stress value is larger than or equal to a preset stress threshold value, generating early warning information;

and step S420, sending the early warning information to a display module for displaying.

It can be understood that after the reference stress value of the airflow pipeline is obtained, the reference stress value is compared with a preset stress threshold value, when the reference stress value is detected to be larger than or equal to the preset stress threshold value, it is indicated that the current airflow pipeline possibly resonates with a compressor, and a risk of fatigue fracture exists.

The technical scheme of the embodiment of the invention can also comprise the following steps: when the reference stress value is detected to be smaller than the preset stress threshold value, prompt information indicating that the air conditioner state is healthy is generated and sent to the display module to be displayed, so that a user can know the running state of the air conditioner, and the user experience is improved.

In addition, as shown in fig. 5, fig. 5 is a flowchart illustrating steps of a control method of an air conditioner according to another embodiment of the present invention. For the control method of the air conditioner according to the embodiment of the present invention, wherein the air conditioner further includes a display module, before step S120 in the embodiment of fig. 1, the control method includes, but is not limited to, step S510 and step S520.

Step S510, acquiring at least two selectable natural frequencies;

in step S520, a reference natural frequency is determined from at least two selectable natural frequencies, where the reference natural frequency is the selectable natural frequency with the smallest frequency difference value from the first operating frequency.

It should be noted that, the embodiment of the present invention does not limit the method for obtaining the reference natural frequency, and the method may be implemented by determining a duct identifier of the airflow duct and obtaining the reference natural frequency corresponding to the duct identifier from a preset electric control parameter table.

It will be appreciated that the natural frequency is an inherent property of an object, and that an object may have a plurality of natural frequency values corresponding thereto, at which the object produces a vibrational response when externally excited. The following describes the technical solution of the present embodiment with a specific example: the acquired first running frequency is assumed to be 45 Hz; the gas flow duct has two selectable natural frequencies: 47Hz, 49 Hz; the optional natural frequency which has the smallest difference of 45Hz with the first operating frequency is determined to be the reference natural frequency, i.e. the reference natural frequency is determined to be 47Hz, which provides an effective data base for subsequently acquiring a second operating frequency which is far away from the reference natural frequency of the airflow duct.

In addition, as shown in fig. 6, fig. 6 is a flowchart of a step of acquiring a second operating frequency according to another embodiment of the present invention. The method provided in the embodiment of fig. 6 corresponds to step S120 in the embodiment shown in fig. 1, and step S120 includes, but is not limited to, step S610 and step S620.

Step S610, acquiring a preset frequency adjustment value;

step S620, when the reference natural frequency is greater than the first operating frequency, determining a difference between the first operating frequency and the frequency adjustment value as a second operating frequency, or when the reference natural frequency is less than the first operating frequency, determining a sum of the first operating frequency and the frequency adjustment value as the second operating frequency.

It should be noted that, the embodiment of the present invention does not limit the specific value of the frequency adjustment value, and a person skilled in the art may determine the frequency adjustment value according to the actual situation

It will be appreciated that, with reference to the embodiment shown in fig. 5, since the reference natural frequency is the natural frequency with the smallest value of the difference from the first operation frequency among the selectable natural frequencies of the gas flow pipeline, that is, the reference natural frequency is close to the first operation frequency, the second operation frequency is obtained to make the current operation frequency of the compressor far from the reference natural frequency, so as to avoid the compressor and the gas flow pipeline from generating resonance. In this embodiment, after the preset frequency adjustment value is obtained, the reference natural frequency is compared with the first operating frequency, and when the reference natural frequency is greater than the first operating frequency, a difference between the first operating frequency and the frequency adjustment value is taken as a second operating frequency, where the first operating frequency is greater than the second operating frequency, so as to enable the second operating frequency to be further away from the reference natural frequency; similarly, when the reference natural frequency is less than the first operating frequency, the second operating frequency is the sum of the first operating frequency and the frequency adjustment value. The following describes the technical solution of the present embodiment with a specific example: assume that the first operating frequency fn is 45 Hz; the frequency adjustment value delta f is 2; when the reference natural frequency fd is 47Hz, fd > fn, and the second operating frequency fn1 is fn- Δ f is 43Hz, the operating frequency of the compressor is increased from 2 to 4, which is further away from the reference natural frequency; when fd is 43Hz, fn > fd, the second operating frequency fn1 is fn + Δ f 47 Hz.

Referring additionally to fig. 7, fig. 7 is a flowchart illustrating steps of obtaining a second operating frequency according to another embodiment of the present invention. The air conditioner in the embodiment of fig. 7 is connected to a remote terminal in a communication manner, and the method provided in the embodiment of fig. 7 includes, but is not limited to, step S710 and step S720.

Step S710, sending the first operating frequency to the remote end, so that the remote end determines a second operating frequency according to the reference natural frequency, the first operating frequency, and a preset frequency adjustment value, where the second operating frequency is a difference between the first operating frequency and the frequency adjustment value when the reference natural frequency is greater than the first operating frequency, or the second operating frequency is a sum of the first operating frequency and the frequency adjustment value when the reference natural frequency is less than the first operating frequency;

and step S720, acquiring a second operating frequency fed back by the remote end.

It can be understood that, in order to describe the method steps of the present embodiment in more detail, the following describes a technical solution of the present embodiment with a specific example: the air conditioner 1010 and the remote end 1020 can be connected in a communication manner as shown in fig. 10, the air conditioner 1010 is provided with a data transmission module 1013 and a compressor control module 1014, and the data transmission module 1013 and the compressor control module 1014 are connected in a communication manner; the remote end 1020 is provided with a data receiving module 1021, an optional natural frequency comparison module 1022 and an electronic control parameter generation module 1023, wherein the data receiving module 1021 is respectively connected with the data transmission module 1013 and the optional natural frequency comparison module 1022, the optional natural frequency comparison module 1022 is connected with the electronic control parameter generation module 1023, and the electronic control parameter generation module 1023 is connected with the compressor control module 1014; the data transmission module 1013 acquires the first operating frequency from the compressor control module 1014, and the air conditioner 1010 sends the first operating frequency to the data receiving module 1021 of the remote end 1020 through the data transmission module 1013; the optional natural frequency comparison module 1022 obtains a first operating frequency from the data receiving module 1021, and obtains a reference natural frequency according to the first operating frequency; the electronic control parameter generating module 1023 determines a second operating frequency according to the reference natural frequency, the first operating frequency and a preset frequency adjustment value, and the electronic control parameter generating module 1023 feeds back the second operating frequency to the compressor control module 1014. It should be noted that, the principle of the specific steps of obtaining the second operating frequency in this embodiment may refer to the description of the embodiment in fig. 6, and is not limited herein. It can be understood that the distributed configuration can ensure the realizability of the control method for the air conditioners provided by the embodiment, and in the case that the remote end is in communication connection with multiple air conditioners, the remote end 1020 can also realize unified control over multiple air conditioners.

In addition, as shown in fig. 8, fig. 8 is a flowchart illustrating steps of a control method of an air conditioner according to another embodiment of the present invention. After step S710 in the embodiment of fig. 7, the method for controlling an air conditioner according to the embodiment of the present invention further includes, but is not limited to, step S810.

Step S810, sending a reference stress value to the remote end, so that the remote end determines a reference natural frequency from at least two selectable natural frequencies when determining that the reference stress value is greater than or equal to a preset stress threshold, where the reference natural frequency is the selectable natural frequency with a smallest frequency difference value from the first operating frequency.

It can be understood that, as described with reference to the embodiment of fig. 7, as shown in fig. 10, the data transmission module 1013 is further connected to the stress collecting module 1011, and the stress collecting module 1011 is used for collecting the reference stress value of the airflow pipeline; after the air conditioner 1010 sends the first operating frequency to the remote end 1020 through the data transmission module 1013, the data transmission module 1013 sends the reference stress value from the stress acquisition module 1011 to the data receiving module 1021 of the remote end 1020, so that the remote end 1020 determines the reference natural frequency from the at least two selectable natural frequencies through the selectable natural frequency comparison module 1022 when determining that the reference stress value is greater than or equal to the preset stress threshold value, and provides an effective data basis for the subsequent electronic control parameter generation module 1023 to determine the second operating frequency according to the reference natural frequency, the first operating frequency and the frequency adjustment value; the specific principle of determining the reference natural frequency may refer to the description of the embodiment shown in fig. 5, which is not repeated herein.

In addition, as shown in fig. 9, fig. 9 is a flowchart illustrating steps of a control method of an air conditioner according to another embodiment of the present invention. After step S130 in the embodiment of fig. 1, the method for controlling an air conditioner according to the embodiment of the present invention further includes, but is not limited to, step S910 and step S920.

Step S910, when the compressor is in a working state, acquiring a new reference stress value of the airflow pipeline, and when the new reference stress value is greater than or equal to a preset stress threshold, acquiring a third operating frequency, wherein an absolute value of a difference value between the third operating frequency and the reference natural frequency is greater than an absolute value of a difference value between the second operating frequency and the reference natural frequency;

step S920, adjusting the operating frequency of the compressor to a third operating frequency to avoid resonance between the airflow pipeline and the compressor.

It can be understood that, after the operating frequency of the compressor is adjusted to the second operating frequency, a new stress condition of the current airflow pipeline needs to be detected, the new reference stress value is compared with the preset stress threshold value, and when the new reference stress value is smaller than the preset stress threshold value, it is determined that the stress condition of the airflow pipeline is normal; when the new reference stress value is larger than or equal to the preset stress threshold value, the risk of fatigue fracture of the airflow pipeline is indicated, and under the condition, a third operating frequency far away from the reference natural frequency is obtained, wherein the absolute value of the difference value between the third operating frequency and the reference natural frequency is larger than the absolute value of the difference value between the second operating frequency and the reference natural frequency; the operation frequency of the compressor is adjusted to be the third operation frequency so as to ensure that the reference stress value of the airflow pipeline is within a normal range, timely maintenance of the airflow pipeline is achieved, resonance of the airflow pipeline and the compressor is avoided, and the risk of fatigue fracture of the airflow pipeline is reduced.

In addition, in order to describe the control method of the air conditioner provided by the present invention in more detail, the technical solution of the present invention is described below with a specific example.

Referring to fig. 10, the air conditioner 1010 includes a compressor (not shown in fig. 10), a stress collection module 1011, a display module 1012, a data transmission module 1013, and a compressor control module 1014, wherein the stress collection module 1011 is connected to a transverse strain channel and a longitudinal strain channel of a strain gauge as shown in fig. 12, the stress collection module 1011 is connected to an air return pipe and an air exhaust pipe of the compressor through the strain gauge, the stress collection module 1011 is in communication connection with the display module 1012 and the data transmission module 1013, respectively, and the compressor control module 1014 is connected to the compressor and the data transmission module 1013, respectively (the compressor control module 1014 is not shown in the figure and is connected to the compressor); the control device of the air conditioner 1010 further comprises a remote end 1020, wherein the remote end 1020 comprises a data receiving module 1021, a selectable natural frequency comparison module 1022 and an electric control parameter generation module 1023, the data receiving module 1021 is in communication connection with the data transmission module 1013, the data receiving module 1021 is in communication connection with the selectable natural frequency comparison module 1022, the selectable natural frequency comparison module 1022 is in communication connection with the electric control parameter generation module 1023, and the electric control parameter generation module 1023 is in communication connection with a compressor control module 1014 of the air conditioner 1010.

It should be noted that, referring to fig. 11 and 12, the air return tube 1121 in fig. 11 is provided with two bends: air return 1 bend and air return 2 bend; exhaust pipe 1111 is provided with two bends: exhaust 1 bend and exhaust 2 bend; wherein, the return air 1 bend is a bend between a first straight line section and a second straight line section of the copper pipe connected with the liquid storage tank 1120; the return air 2 bend is a bend between the second straight line section and the third straight line section of the copper pipe connected with the liquid storage tank 1120; the exhaust 1 bend is a bend between a first straight section and a second straight section of the copper pipe connected with the compressor body 1110; the exhaust 2 bend is a bend between the second straight line segment and the third straight line segment of the copper pipe connected with the compressor body 1110; strain gauges 1200 are respectively arranged on the angle bisectors of the return air 1 bend, the return air 2 bend, the exhaust air 1 bend and the exhaust air 2 bend, and the strain gauges 1200 are bidirectional strain gauges shown in fig. 12. The stress collection module in the embodiment shown in fig. 10 is provided with 8 connection nodes for connecting the return air 1 bend, the return air 2 bend, the exhaust air 1 bend and the exhaust air 2 bend in fig. 11, and the transverse strain channel 1210 and the longitudinal strain channel 1220 of each strain gauge 1200 at these 4 bends, thereby obtaining the reference stress value of each bend of the airflow pipeline.

It should be noted that the method steps of the first example are applied to the control device of the air conditioner shown in fig. 10.

First, referring to fig. 13, fig. 13 is an overall flowchart of a control method of an air conditioner according to another embodiment of the present invention, where the control method of the air conditioner includes the following steps:

step 1310, setting the operation mode of the air conditioner to be a refrigeration mode, setting the temperature of the air conditioner to be 16 ℃, setting the wind speed of the air conditioner to be 100%, after an air conditioner external unit is started to stably operate for 5 minutes, acquiring the transverse stress value and the longitudinal stress value of each strain gage according to a preset sampling rate by a stress acquisition module, wherein the preset sampling rate is 1kS/S, synthesizing reference stress values according to the transverse stress value and the longitudinal stress value, and obtaining stress data as shown in fig. 14, wherein the reference stress value of a return air 1 bend is 16.3Mpa, the reference stress value of a return air 2 bend is 13.7Mpa, the reference stress value of an exhaust air 1 bend is 5.4Mpa, and the reference stress value of an exhaust air 2 bend is 4.3 Mpa;

step S1320, comparing the collected reference stress value with a preset stress threshold value, wherein the preset stress threshold value is 15MPa, determining that the reference stress value of the return air 1 bend is larger than the preset stress threshold value, and displaying early warning information to a user through a display module, wherein the content of the early warning information is 'please contact the after-sales maintenance';

step S1330, obtaining, by the compressor control module, a first operating frequency, that is, a current operating frequency of the compressor, assuming that the first operating frequency fn is 45 Hz;

step S1340, inputting each reference stress value and the first operating frequency into a data transmission module while displaying the early warning information, and transmitting the reference stress values and the first operating frequency to a data receiving module of a remote end through the data transmission module;

step S1350, the remote end receives and stores the reference stress value and the first operating frequency through the data receiving module;

step S1360, the remote end inquires a filed electric control parameter table of the air conditioner outdoor unit, obtains a selectable natural frequency of an air flow pipeline (an exhaust pipeline and an air return pipeline) from the electric control parameter table, compares the first operating frequency with the selectable natural frequency through a selectable natural frequency comparison module to obtain a reference natural frequency closest to the first operating frequency, and assumes that the reference natural frequency is fd-47 Hz;

step S1370, the electric control parameter generating module determines a second operating frequency according to the reference natural frequency, the first operating frequency and a preset frequency adjusting value, wherein the absolute value of the difference value between the second operating frequency and the reference natural frequency is larger than the absolute value of the difference value between the first operating frequency and the reference natural frequency; as the first operating frequency fn is 45Hz, the reference natural frequency fd is 47Hz, the first operating frequency is less than the reference natural frequency, the preset frequency adjustment value Δ f is 2, and the second operating frequency is determined as the difference between the first operating frequency and the adjustment value, that is, the second operating frequency is 43 Hz;

step S1380, transmitting the second running frequency generated by the remote end electric control parameter generation module to a compressor control module of the air conditioner end, and adjusting the current running frequency of the compressor to the second running frequency, namely 43 Hz;

step S1390, after the operation frequency of the compressor is adjusted to the second operation frequency, the stress data of the airflow pipeline is as shown in fig. 15, the reference stress value of the return air 1 bend is reduced to 9.7MPa, the reference stress value of the return air 2 bend is 8.5MPa, the reference stress value of the exhaust air 1 bend is 6.1MPa, and the reference stress value of the exhaust air 2 bend is 5.2MPa, and the reference stress values of the pipelines are compared with a preset stress threshold value of 15MPa, so that the reference stress values of the pipelines of the compressor at this time are known to be less than 15MPa, and the display module displays the prompt information of "healthy air conditioning state" content.

As shown in fig. 16, fig. 16 is a block diagram of a control device of an air conditioner according to an embodiment of the present invention. The present invention also provides a control apparatus 1600 of an air conditioner, comprising: at least one control processor 1620 and memory 1610 for communicative connection with the at least one control processor 1620; the memory 1610 stores instructions executable by the at least one control processor 1620, and the instructions are executed by the at least one control processor 1620 to enable the at least one control processor 1620 to perform the control method of the air conditioner as described above.

The memory 1610, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs and non-transitory computer-executable programs, such as the control method of the air conditioner in the above embodiments of the present invention. The control processor 1620 implements the control method of the air conditioner in the above embodiment of the present invention by operating the non-transitory software program and the instructions stored in the memory 1610.

The memory 1610 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data and the like required to perform the control method of the air conditioner in the above-described embodiments. Further, memory 1610 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. It is noted that the memory 1610 may alternatively comprise memory remotely located from the control processor 1620, and such remote memory may be coupled to the terminal via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

Non-transitory software programs and instructions required to implement the control method of the air conditioner in the above-described embodiments are stored in a memory, and when executed by one or more processors, perform the control method of the air conditioner in the above-described embodiments, for example, perform the above-described method steps S110 to S130 in fig. 1, method steps S210 to S230 in fig. 2, method step S310 in fig. 3, method steps S410 to S420 in fig. 4, method steps S510 to S520 in fig. 5, method steps S610 to S620 in fig. 6, method steps S710 to S720 in fig. 7, method step S810 in fig. 8, and method steps S910 to S920 in fig. 9.

The embodiment of the invention also provides an air conditioner, which comprises the control device 1600 of the air conditioner in the embodiment.

The present invention also provides a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the control method of an air conditioner as in the above-described embodiments, for example, the method steps S110 to S130 in fig. 1, the method steps S210 to S230 in fig. 2, the method step S310 in fig. 3, the method steps S410 to S420 in fig. 4, the method steps S510 to S520 in fig. 5, the method steps S610 to S620 in fig. 6, the method steps S710 to S720 in fig. 7, the method step S810 in fig. 8, and the method steps S910 to S920 in fig. 9, which are described above.

The above described embodiments of the apparatus are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.

Claims

1. A control method of an air conditioner, characterized in that the air conditioner comprises a compressor, the compressor is provided with an airflow pipeline, and the control method of the air conditioner comprises the following steps:

2. The method of claim 1, wherein the airflow conduits include at least one return air conduit and at least one exhaust conduit, and wherein obtaining a first operating frequency when the reference stress value is greater than or equal to a predetermined stress threshold comprises:

acquiring a return air reference stress value of each return air pipeline;

acquiring an exhaust reference stress value of each exhaust pipeline;

3. The method of claim 1, wherein the airflow duct is provided with a strain gauge for obtaining transverse stress values and longitudinal stress values of the airflow duct, the air conditioner further comprises a stress collecting module connected with the strain gauge, and the obtaining of the reference stress value of the airflow duct comprises:

4. The method of claim 1, wherein the air conditioner further comprises a display module, and after the obtaining the reference stress value of the airflow duct, the method further comprises:

and sending the early warning information to the display module for displaying.

5. The method of claim 1, wherein prior to said obtaining a second operating frequency, the method further comprises:

acquiring at least two selectable natural frequencies;

determining the reference natural frequency from at least two of the selectable natural frequencies, the reference natural frequency being the selectable natural frequency having a smallest value of the difference from the first operating frequency.

6. The method of claim 1, wherein said obtaining a second operating frequency comprises:

acquiring a preset frequency adjustment value;

and when the reference natural frequency is greater than the first operating frequency, determining a difference between the first operating frequency and the frequency adjustment value as the second operating frequency, or when the reference natural frequency is less than the first operating frequency, determining a sum of the first operating frequency and the frequency adjustment value as the second operating frequency.

7. The method according to any one of claims 1 to 4, wherein the air conditioner is in communication connection with a remote end, and the obtaining the second operating frequency comprises:

and acquiring the second operating frequency fed back by the remote end.

8. The method of claim 7, wherein after said transmitting said first operating frequency to said remote end, said method further comprises:

9. The method of claim 1, wherein after the adjusting the operating frequency of the compressor to the second operating frequency, the method further comprises:

when the compressor is in a working state, acquiring a new reference stress value of the airflow pipeline, and when the new reference stress value is greater than or equal to a preset stress threshold value, acquiring a third operating frequency, wherein the absolute value of the difference between the third operating frequency and the reference natural frequency is greater than the absolute value of the difference between the second operating frequency and the reference natural frequency;

10. A control device of an air conditioner is characterized by comprising at least one control processor and a memory which is in communication connection with the at least one control processor; the memory stores instructions executable by the at least one control processor to enable the at least one control processor to perform the method of controlling an air conditioner according to any one of claims 1 to 9.

11. An air conditioner characterized by comprising the control device of the air conditioner according to claim 10.

12. A computer-readable storage medium storing computer-executable instructions for causing a computer to perform the control method of an air conditioner according to any one of claims 1 to 9.