CN114777368A

CN114777368A - Method and device for monitoring risk of circulation system pipeline and circulation system

Info

Publication number: CN114777368A
Application number: CN202210367930.5A
Authority: CN
Inventors: 丁爽; 王飞; 许文明; 崔文娟; 林超
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2022-07-22

Abstract

The application relates to the technical field of refrigerant circulation and discloses a method for monitoring risk of a pipeline of a circulation system, which comprises the following steps: acquiring preset parameters of the circulating system; the preset parameters include: temperature or current; determining the stress of a plurality of preset positions on the pipeline according to preset parameters; determining the total damage of each preset position according to the stress of each preset position; and determining the risk condition of the pipeline according to the total damage of each preset position. In this way, the total damage at each preset location is characterized by temperature or current. The temperature sensor and the current sensor do not need regular and frequent calibration during normal operation of the circulation system. And high-precision sensors such as an acceleration sensor and a strain gauge are not required to be additionally arranged. Thereby improving the convenience of system monitoring. The application also discloses a device, a circulation system and a storage medium for monitoring the risk of the circulation system pipeline.

Description

Method and device for monitoring risk of circulation system pipeline and circulation system

Technical Field

The present disclosure relates to the field of refrigerant circulation technologies, and in particular, to a method and an apparatus for monitoring risk of a pipeline of a circulation system, and a circulation system.

Background

The compressor-piping system is an important component of the refrigeration/heat pump cycle system, and the service life of the compressor-piping system is related to the normal operation of the system. At present, metal pipes are mostly used for pipelines of compressor-pipeline systems. Metallic materials are susceptible to fatigue failure as service life increases (fatigue failure is the failure process of a mechanical component subjected to alternating stresses in which grains with relatively weak high stress concentration zones form microcracks after a certain number of cycles, then develop macrocracks and continue to propagate, and finally break). The source of vibration in the compressor-piping system is from the compressor, and vibration is transmitted to the piping by the pulsating flow of refrigerant and the rotational vibration of the compressor. In some important use scenes of a refrigeration/heat pump circulating system, namely end users with high requirements on temperature and humidity control, such as a control machine room, a cultural relic storage room, a biological laboratory, a ward and the like, no early warning fault of the system can cause great damage.

The related art discloses a method for judging fatigue life of an air conditioner pipeline, which comprises the following steps: acquiring a finished-grade S-N curve of the piping; respectively acquiring first cycle times of air conditioner piping under stress corresponding to transportation, start-stop and stable operation on the basis of a piping finished grade S-N curve; respectively acquiring second cycle times of air conditioner piping transportation, start-stop and stable operation under the target service life; establishing an air conditioner piping fatigue life calculation model; calculating the fatigue life of the air-conditioning tubing by combining an air-conditioning tubing fatigue life calculation model on the basis of the acquired first cycle times and second cycle times; and if the fatigue life of the air conditioner piping is greater than or equal to the target service life, the air conditioner pipeline is qualified.

In the method, the stress values of the air conditioner in the three processes of transportation, start-stop and stable operation of the tubing are measured by the sensor. But this solution is only suitable for laboratory tests. If the stress value is detected during the use of the user, a high-precision sensor such as an acceleration sensor, a strain gauge and the like needs to be added to each device. However, such high-precision sensors need to be calibrated regularly to ensure data accuracy, and are inconvenient to use.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a method and a device for monitoring risk of a pipeline of a circulation system, the circulation system and a storage medium, so that convenience for monitoring the system is improved in the normal use and operation process of the circulation system.

In some embodiments, the method comprises: acquiring preset parameters of the circulating system; the preset parameters include: temperature or current; determining the stress of a plurality of preset positions on the pipeline according to preset parameters; determining the total damage of each preset position according to the stress of each preset position; and determining the risk condition of the pipeline according to the total damage of each preset position.

In some embodiments, the apparatus comprises: a processor and a memory storing program instructions, the processor being configured to, upon execution of the program instructions, perform the aforementioned method for monitoring risk of circulation system piping.

In some embodiments, the circulation system comprises: such as the aforementioned means for monitoring the risk of circulation system piping.

In some embodiments, the storage medium stores program instructions that, when executed, perform the aforementioned method for monitoring risk of circulation system piping.

The method, the device, the circulation system and the storage medium for monitoring the risk of the pipeline of the circulation system provided by the embodiment of the disclosure can realize the following technical effects:

and determining the total damage of each preset position based on preset parameters, and further determining the risk condition of the pipeline. The preset parameter may be a temperature obtained by a temperature sensor, or may be a current obtained by a current sensor. That is, the total damage at each preset location is characterized by temperature or current. And high-precision sensors such as an acceleration sensor and a strain gauge are not required to be additionally arranged. Moreover, the temperature sensor and the current sensor do not need to be regularly and frequently calibrated during normal operation of the circulation system. Thereby improving the convenience of monitoring the system.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic diagram of a circulation system provided by embodiments of the present disclosure;

FIG. 2 is a schematic structural diagram of another circulation system provided by an embodiment of the disclosure;

FIG. 3 is a schematic diagram of a method for monitoring risk of a circulation system pipeline provided by an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of another method for monitoring risk of a circulation system pipeline provided by an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a method for determining a functional relation provided by an embodiment of the disclosure;

FIG. 6 is a schematic diagram of a pipeline with a stress detector in a circulation system provided by an embodiment of the present disclosure;

FIG. 7 is a schematic view of a coating disposed on a pipe in a circulation system provided by an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of another method for monitoring risk of a circulation system pipeline provided by an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of another method for monitoring risk of circulation system piping provided by an embodiment of the present disclosure;

FIG. 10 is a schematic diagram of another method for monitoring risk of circulation system piping provided by an embodiment of the present disclosure;

FIG. 11 is a schematic diagram of an application provided by an embodiment of the present disclosure;

FIG. 12 is a schematic diagram of another application provided by an embodiment of the present disclosure;

FIG. 13 is a schematic view of an apparatus for monitoring risk in a circulation system pipeline provided by an embodiment of the present disclosure;

fig. 14 is a schematic view of another device for monitoring risk of a circulation system pipeline provided by the embodiment of the disclosure.

Reference numerals:

10. a compressor; 20. a condenser; 30. a throttling device; 40. an evaporator; 50. an exhaust pipe; 60. an air return pipe; 70. a temperature detector; 80. a current sensor; 90. a stress detector; 100. and (4) coating.

Detailed Description

So that the manner in which the features and advantages of the embodiments of the present disclosure can be understood in detail, a more particular description of the embodiments of the disclosure, briefly summarized above, may be had by reference to the appended drawings, which are included to illustrate, but are not intended to limit the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged as appropriate for the embodiments of the disclosure described herein. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The term "plurality" means two or more unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.

As shown in conjunction with fig. 1 and 2, embodiments of the present disclosure provide a circulatory system. The circulation system includes: a circulation circuit constituted by the compressor 10, the condenser 20, the throttle device 30, and the evaporator 40. The discharge port of the compressor 10 communicates with the condenser 20 through a discharge pipe 50. The return air port of the compressor 10 communicates with the evaporator 40 through a return air pipe 60. Since both the discharge pipe 50 and the return pipe 60 communicate with the compressor 10, the influence of the vibration is large. Thus, exhaust pipe 50 and muffler 60 are both conduits that require risk monitoring. The exhaust pipe 50 and the return pipe 60 are hereinafter referred to simply as piping.

With reference to fig. 3, an embodiment of the present disclosure provides a method for monitoring risk of a circulation system pipeline, including:

s301, the processor acquires preset parameters of a circulating system; the preset parameters include: temperature or current.

S302, the processor determines the stress of a plurality of preset positions on the pipeline according to preset parameters.

And S303, the processor determines the total damage of each preset position according to the stress of each preset position.

S304, the processor determines the risk condition of the pipeline according to the total damage of each preset position.

And acquiring preset parameters of the circulating system. The preset parameter may be temperature or current. Referring again to fig. 1, temperature detectors 70 are provided in the middle of the condenser, in the middle of the evaporator, and on the exhaust pipe to obtain the temperature Tc of the condenser, the temperature Te of the evaporator, and the temperature Td of the exhaust pipe. The temperature of the preset parameter refers to a combination of the temperature of the condenser, the temperature of the evaporator and the temperature of the discharge port of the compressor. The temperature detector 70 may be a temperature sensor or a thermocouple. Or, referring to fig. 2 again, the bottoms and the bent parts of the exhaust pipe and the muffler are coated with a conductive coating, such as a lead titanate coating, and a current sensor 80 is disposed at a corresponding position to obtain a current at the corresponding position. A plurality of preset positions are arranged on the pipeline. The preset parameters can represent the stress applied to each preset position. Determining the stress of each preset position according to the preset parameters. A location is often subjected to multiple cycles of a certain level of force. Each cycle can cause damage to the site. Until the position reaches fatigue life. When the position reaches the fatigue life, damage such as cracking occurs, thereby causing a risk. And determining the total damage of each preset position according to the stress of each preset position. And then determining the risk condition of the pipeline according to the total damage of each preset position.

In the embodiment of the disclosure, the total damage of each preset position is determined based on preset parameters, and then the risk condition of the pipeline is determined. The preset parameter may be a temperature obtained by a temperature sensor, or may be a current obtained by a current sensor. That is, the total damage at each preset location is characterized by temperature or current. The temperature sensor and the current sensor do not need to be regularly and frequently calibrated during normal operation of the circulation system. And high-precision sensors such as an acceleration sensor and a strain gauge are not required to be additionally arranged. Thereby improving the convenience of system monitoring.

Optionally, with reference to fig. 4, another method for monitoring risk of a circulation system pipeline is provided in an embodiment of the present disclosure, including:

S312, the processor obtains a function relation between the pre-established preset parameters and the stress.

S322, the processor substitutes the acquired preset parameters into the functional relation to calculate the stress of each preset position.

And S303, determining the total damage of each preset position by the processor according to the stress of each preset position.

Before the circulating system leaves a factory, a storage module of the circulating system is pre-stored with a function relation between preset parameters and stress. When the predetermined parameter is temperature, the functional relation is S ═ f (Td, Tc, Te), where S is stress, Td is the temperature of the exhaust pipe, Tc is the temperature of the condenser, and Te is the temperature of the evaporator. When the predetermined parameter is current, the functional relation is S ═ f (a), where S is stress and a is current. When determining the stress of the preset position of the pipeline, firstly, acquiring a function relation corresponding to the preset parameter. And then, substituting the acquired preset parameters into the corresponding functional relation, thereby calculating the stress of each preset position. If the preset parameter is temperature, S ═ f (Td, Tc, Te) is acquired, and the acquired Td, Tc, and Te are taken into S ═ f (Td, Tc, Te), whereby the stress at each preset position is calculated. If the preset parameter is current, S ═ f (A) is obtained, the obtained A is brought into S ═ f (A), and the stress of each preset position is calculated. Therefore, the purpose of calculating the stress through the temperature or the current can be achieved by utilizing the pre-established functional relation between the preset parameters and the stress. An acceleration sensor or a strain gauge is not required, so that the convenience of system monitoring is improved.

It should be noted that, for the specific implementation process of steps S301, S303, and S304, reference may be made to the above embodiments, and details are not described herein again.

Optionally, as shown in fig. 5, the functional relation is determined by:

s501, before the circulating system leaves a factory, the testing equipment performs vibration stress testing on the pipeline.

S502, the processor obtains preset parameters of the circulating system and the stress of each corresponding preset position under different test working conditions.

And S503, fitting the preset parameters and the stress of each preset position under the same test working condition by the processor to obtain a functional relation corresponding to the stress of each preset position and the preset parameters.

Before the circulation system leaves a factory, vibration stress testing is generally carried out on a pipeline of the circulation system so as to ensure that the pipeline is normal before leaving the factory. The method comprises the steps of utilizing a vibration stress test performed before a circulating system leaves a factory to obtain the stress of each preset position corresponding to the combination of the temperature of a condenser, the temperature of an evaporator and the temperature of an exhaust port of a compressor under different test working conditions of a pipeline. The combination of temperatures is then fitted to the corresponding stress at each preset location, resulting in a functional relationship S ═ f (Td, Tc, Te) between the combination of stress and temperature at each preset location. Or, acquiring the stress corresponding to the current at each preset position of the pipeline under different test working conditions. And then fitting the current and the corresponding stress of each preset position to obtain a functional relation S (f (A)) between the stress and the corresponding current of each preset position.

Specifically, when the preset parameter is temperature, as shown in fig. 6:

the method comprises the following steps: the key position of the pipeline which is easy to be subjected to larger stress is a preset position, generally the bottom of a U-shaped pipe and the bending position of a pipe group. Each preset position is marked as position 1 to position n. At each preset position a stress detector 90, such as a strain gauge or an acceleration sensor, is arranged. When the vibration problem caused by the compressor is researched, the pipeline refers to an exhaust pipe and a return air pipe which are connected with the compressor.

Wherein, the blast pipe: a pipe group (heat pump type) for connecting the exhaust port of the compressor and the four-way valve, or an air inlet pipe group (single cooler) for connecting the return port of the compressor and the condenser;

air return pipe: and the heat pump type compressor is used for connecting a return port of the compressor with a pipe group of a four-way valve (a heat pump type), or is used for connecting the return port of the compressor with a stop valve (a single-cold machine).

Step two: the temperature detector 70 is disposed within 100mm of the compressor-exhaust pipe connection, at the condenser flow path intermediate position, and at the evaporator flow path intermediate position.

Step three: the refrigeration/heat pump system runs in a connected mode, different testing working conditions (environment temperature, humidity, indoor and outdoor fan rotating speed and the like) are changed, and numerical values of n stress at the positions 1-position n under the condition of different combinations of Td, Tc and Te are recorded.

Step IV: the recorded data are arranged according to the format of table 1, and a relational function S of the stress S at each preset position on the pipeline, Td, Tc and Te is fitted to f (Td, Tc and Te) by using a data analysis tool.

TABLE 1 temperature vs. stress relationship

When the parameter is current, as shown in fig. 7:

the method comprises the following steps: the key position of the pipeline, which is easily subjected to larger stress, is a preset position, generally the bottom of the U-shaped pipe and the bending part of the pipe group. At each preset position, a coating 100 capable of conducting electricity, such as a lead titanate coating, is applied and is labeled position 1 through position n. Each coating 100 is connected to a current sensor by a wire. When the vibration problem caused by the compressor is studied, the pipeline refers to an exhaust pipe and an air return pipe which are connected with the compressor.

air return pipe: a pipe group (heat pump type) for connecting the return air port of the compressor and the four-way valve, or a pipe group (single-cold machine) for connecting the return air port of the compressor and the stop valve.

Step two: another set of samples, which are the same as those in step i, are prepared, and the positions coated with the coating 100, and the stress detectors 90 are correspondingly arranged, which are also marked as positions 1 to n, are numbered the same as those in step i, as shown in fig. 6. The stress detector 90 may be a strain gauge or an acceleration sensor.

Step three: the refrigeration/heat pump system runs in a connecting mode, and different testing working conditions (environment temperature, humidity, indoor and outdoor fan rotating speed and the like) are changed: a) recording current values A of positions 1-n returned by the conducting wire; b) and recording the stress values S from the position 1 to the position n transmitted back by the strain gauge or the acceleration sensor.

Step IV: and (3) sorting the recorded data according to a format in a table 2, and fitting a relation function S (f) (A) of the stress S and A of each preset position on the pipeline by using a data analysis tool.

TABLE 2 correspondence of current to stress

Classification of	A₁	A₂	A₃	……	A_n
						Position 1	S₁₁	S₁₂	S₁₃	……	S_1n
Position 2	S₂₁	S₂₂	S₂₃	……	S_2n
						Position 3	S₃₁	S₃₂	S₃₃	……	S_3n
……	……	……	……	……	……
						Position n	S_n1	S_n2	S_n3	……	S_nn

It should be noted that, the method of fitting a functional relation by using a data analysis tool is prior art, and is not described herein again.

Therefore, a functional relation between the temperature and the stress or between the current and the stress can be established through a vibration stress test performed before the circulation system leaves a factory. When the circulating system normally operates, the stress S of each preset position can be determined by using the combination of the temperatures Td, Tc and Te which are convenient to obtain based on a pre-established relational expression; or determining the stress S of each corresponding preset position by using the current A of each preset position which is convenient to obtain. Thereby improving the convenience of system monitoring.

Optionally, with reference to fig. 8, another method for monitoring risk of a circulation system pipeline is provided in an embodiment of the present disclosure, including:

S313, the processor determines the number of cycles that each preset position is under stress.

And S323, determining the fatigue life of each preset position by the processor according to the stress of each preset position.

And S333, determining the total damage of each preset position by the processor according to the fatigue life and the cycle number of each preset position.

Recording different stress levels S by using a timing module arranged in the system_iCompressor run time t at different frequencies_m。n_iIs at S_iThe number of cycles under action is calculated from the actual operating frequency and operating time, i.e.

Wherein m is the compressor operating frequency (integer, maximum a is the maximum operating frequency of the compressor), t_mIs the running time of the compressor (in s) at frequency m.

N_iIs at S_iThe life of the cycle to failure under the action is determined by the fatigue life S-N curve. The storage module stores a predetermined S-N curve. The S-N curve is determined before the circulation system leaves the factory, and the specific determination method is the prior art and is not described herein again.

At any predetermined position on the pipeline, at stress level S_iUnder the action of n_iThe damage to the secondary cycle was:

if at k stress levels S_iUnder the action of n_iThe minor cycle, then, may define its total damage as:

thus, based on the above formula, the total damage for each preset position can be determined for the purpose of determining the risk condition of the pipeline.

It should be noted that, for the specific implementation process of steps S301, S302, and S304, reference may be made to the above embodiments, and details are not described herein again.

Optionally, with reference to fig. 9, another method for monitoring risk of a circulation system pipeline is provided in an embodiment of the present disclosure, including:

And S314, determining the risk of the service life of the pipeline by the processor under the condition that the total damage of any one preset position is greater than a damage threshold value.

S324, the processor determines that the pipeline is normal under the condition that the total damage of each preset position is smaller than or equal to the damage threshold value.

S305, the processor sends alarm information under the condition that the pipeline has risks.

If a crack or other damage occurs at any one location in the piping, the refrigerant in the entire system will leak. Thus, when the total damage at any one of the plurality of predetermined locations is greater than the damage threshold, the risk that the pipeline has reached service life is determined. At the moment, alarm information is sent to prompt a user to update and maintain the pipeline in time. There are many kinds of alarm information sending, for example, pushing a message to a terminal device of a user, or sending a prompt sound by a voice module of the circulation system itself, and so on. The terminal device is an electronic device with a wireless connection function, can be in communication connection with the device with the circulation system by being connected with the internet, and can also be in communication connection with the device with the circulation system directly in a Bluetooth mode, a wifi mode and the like. In some embodiments, the terminal device is, for example, a mobile device, a computer, a vehicle-mounted device built in a hovercar, or the like, or any combination thereof. The mobile device may include, for example, a cell phone, a smart home device, a wearable device, a smart mobile device, a virtual reality device, and the like, or any combination thereof, where the wearable device includes, for example: intelligent wrist-watch, intelligent bracelet, pedometer etc..

And otherwise, when the total damage of all the preset positions is less than or equal to the damage threshold value, determining that the pipeline is normal. Optionally, the damage threshold is less than 1, for example, may be 0.98, and may also be adjusted according to actual needs.

Thus, by comparing the total damage at each preset location to a damage threshold. And if the total damage of any one preset position is larger than the damage threshold value, determining the risk that the pipeline reaches the service life. Otherwise, the pipeline is determined to be normal. Thereby improving the requirement for determining the pipeline risk and fully ensuring the normal operation of the pipeline.

It should be noted that, for the specific implementation process of steps S301, S302, and S303, reference may be made to the above embodiments, and details are not described herein again.

Optionally, with reference to fig. 10, another method for monitoring risk of a circulation system pipeline is provided in an embodiment of the present disclosure, including:

s1001, acquiring preset parameters of a circulating system by a processor; the predetermined parameter is current.

S1002, the processor sends alarm information under the condition that the current is abnormal.

And S1003, determining the stress of a plurality of preset positions on the pipeline according to the current by the processor under the condition that the current is normal.

And S1004, the processor determines the total damage of each preset position according to the stress of each preset position.

S1005, the processor determines the risk condition of the pipeline according to the total damage of each preset position.

S1006, the processor sends alarm information under the condition that the pipeline has risks.

The risk of the pipeline is determined based on the damage to the pipeline caused by vibration, and the pipeline needs to wait for a plurality of vibration cycles, which is a process of accumulating loss. Before that, if the preset parameter is the current, it can be firstly determined whether S corresponding to the current a exceeds the yield strength of the pipeline material, i.e. whether a is abnormal. Optionally, a current threshold is set. If the obtained current is larger than the current threshold value, the current A is abnormal, and the stress S is larger than the yield strength of the pipeline material. If the current drawn is less than or equal to the current threshold, then the current A is normal, at which time the stress S is less than or equal to the yield strength of the tubing material.

Alternatively, if the current a at any one of the predetermined locations is greater than the current threshold, i.e., the stress S at any one of the predetermined locations is greater than the yield strength of the material of the pipeline, the pipeline will be at risk of permanent failure and failure to recover. That is, in this case, the vibration is not circulated to the pipeline, and there is a risk of damage to the pipeline. Therefore, the abnormity of the pipeline A is determined at the moment, and alarm information is sent to remind a user of timely replacing and maintaining the pipeline. On the contrary, if the current a at any one of the preset positions is smaller than or equal to the current threshold, that is, the stress S at any one of the preset positions is smaller than or equal to the yield strength of the pipeline material, it indicates that the current pipeline material will reach the service life limit after multiple vibration cycles. The accumulated damage may then be monitored during operation of the system. If A is determined to be normal, the next step is carried out: and determining the stress of a plurality of preset positions on the pipeline according to the current, and continuing the subsequent steps. In this way, the risk to the system at low stresses greater than the yield strength of the pipeline material can be reduced.

It should be noted that, for specific implementation processes of steps S1001, S1003, S1004, S1005, and S1006, reference may be made to the above embodiments, and details are not described here again.

In practical applications, when the preset parameter is temperature, as shown in fig. 11:

s1101, normally operating a circulating system;

s1102, obtaining Td, Tc, Te, m and t_m；

S1103, calculating S from S ═ f (Td, Tc, Te) at intervals of time T_iAccording to

Calculating n_iAnd according to S_iAnd the S-N curve determines N_i；

S1104, according to

Calculating the total damage of each preset position;

s1105, judging whether the total damage D of any one preset position is larger than 0.98; if so, go to S1106; if not, executing S1101;

and S1106, sending alarm information.

When the preset parameter is current, as shown in fig. 12:

s1201, the circulation system normally operates;

s1202, obtaining m and t_mAnd a current A for each preset position;

s1203, judging whether the current A at any one preset position is larger than a current threshold A'; if so, go to S1207; if not, executing S1204;

s1204, calculating S from S ═ f (A) at intervals of time T_iAccording to

Calculating n_iAnd according to S_iAnd S-N curveDetermination of N_i；

S1205, according to

Calculating the total damage of each preset position;

s1206, judging whether the total damage D of any one preset position is larger than 0.98; if so, go to S1207; if not, executing S1201;

s1207, alarm information is sent.

Referring to fig. 13, an embodiment of the present disclosure provides an apparatus for monitoring risk of a circulation system pipeline, including: an acquisition module 131, a first determination module 132, a second determination module 133, and a third determination module 134. The obtaining module 131 is configured to obtain preset parameters of the circulatory system; the preset parameters include: temperature or current. The first determination module 132 is configured to determine stresses at a plurality of predetermined locations on the pipeline based on predetermined parameters. The second determination module 133 is configured to determine a total damage for each preset location based on the stress for each preset location. The third determination module 134 is configured to determine a risk profile of the pipeline based on the total damage for each preset location.

By adopting the device for monitoring the risk of the circulating system pipeline provided by the embodiment of the disclosure, the total damage of each preset position is determined based on the preset parameters, and then the risk condition of the pipeline is determined. The preset parameter may be a temperature obtained by a temperature sensor, or may be a current obtained by a current sensor. That is, the total damage at each preset location is characterized by temperature or current. The temperature sensor and the current sensor do not need regular and frequent calibration during normal operation of the circulation system. And high-precision sensors such as an acceleration sensor and a strain gauge are not required to be additionally arranged. Thereby improving the convenience of monitoring the system.

As shown in fig. 14, an apparatus for monitoring risk of a circulation system pipeline according to an embodiment of the present disclosure includes a processor (processor)140 and a memory (memory) 141. Optionally, the apparatus may also include a Communication Interface (Communication Interface)142 and a bus 143. The processor 140, the communication interface 142, and the memory 141 may communicate with each other through a bus 143. Communication interface 142 may be used for information transfer. The processor 140 may call logic instructions in the memory 141 to perform the method for monitoring risk of circulation system pipe according to the above-described embodiment.

In addition, the logic instructions in the memory 141 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.

The memory 141 is a computer-readable storage medium and can be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 140 executes functional applications and data processing by executing program instructions/modules stored in the memory 141, i.e., implements the method for monitoring risk of circulation system plumbing in the above-described embodiments.

The memory 141 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 created according to the use of the terminal device, and the like. Further, the memory 141 may include a high-speed random access memory, and may also include a nonvolatile memory.

The embodiment of the disclosure provides a circulation system, which comprises the device for monitoring the risk of the pipeline of the circulation system.

The embodiment of the disclosure provides an air conditioner, which comprises the circulating system.

Embodiments of the present disclosure provide a storage medium storing computer-executable instructions configured to perform the above-described method for monitoring risk of circulation system piping.

The storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.

The above description and the drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.

Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses, and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims

1. A method for monitoring risk of a circulation system pipeline, comprising:

acquiring preset parameters of the circulating system; the preset parameters include: temperature or current;

determining the stress of a plurality of preset positions on the pipeline according to preset parameters;

determining the total damage of each preset position according to the stress of each preset position;

and determining the risk condition of the pipeline according to the total damage of each preset position.

2. The method of claim 1, wherein determining the stress at the predetermined location of the pipeline based on the predetermined parameter comprises:

acquiring a function relation between a preset parameter and stress which are established in advance;

and substituting the obtained preset parameters into the functional relation to calculate the stress of each preset position.

3. The method of claim 2, wherein the functional relationship is determined by:

before the circulation system leaves a factory, carrying out vibration stress test on the pipeline;

acquiring preset parameters of the circulating system and stress of each corresponding preset position under different test working conditions;

and fitting the preset parameters and the stress of each preset position under the same test working condition to obtain a functional relation corresponding to the stress of each preset position and the preset parameters.

4. The method of claim 1, wherein determining the total damage for each preset location based on the stress for each preset location comprises:

determining the cycle number of each preset position under the action of stress;

determining the fatigue life of each preset position according to the stress of each preset position;

and determining the total damage of each preset position according to the fatigue life and the cycle number of each preset position.

5. The method of claim 1, wherein determining the risk profile of the pipeline based on the total damage at each predetermined location comprises:

and determining the risk of the pipeline reaching the service life under the condition that the total damage of any one preset position is greater than a damage threshold value.

6. The method according to any one of claims 1 to 5, further comprising:

and sending alarm information under the condition that the pipeline has risks.

7. The method according to any one of claims 1 to 5, wherein the preset parameter is current; the method further comprises the following steps:

sending alarm information under the condition of abnormal current;

and under the condition that the current is normal, determining the stress of a plurality of preset positions on the pipeline according to preset parameters.

8. An apparatus for monitoring risk of a circulation system pipe, comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for monitoring risk of a circulation system pipe according to any one of claims 1 to 7 when executing the program instructions.

9. A circulation system comprising a device for monitoring risk of circulation system piping according to claim 8.

10. A storage medium storing program instructions which, when executed, perform a method for monitoring risk of a circulation system line according to any one of claims 1 to 7.