Refrigerant pipeline stress-strain monitoring system, air conditioning equipment and refrigeration equipment

Abstract

The utility model relates to a refrigerant pipeline stress-strain monitoring system, air conditioning equipment and refrigeration equipment, the refrigerant pipeline stress-strain monitoring system comprises a fiber bragg grating monitoring assembly and a refrigerant pipeline, and the fiber bragg grating monitoring assembly comprises a strain monitoring assembly and a temperature monitoring assembly which are adjacently arranged; the strain monitoring assembly and the temperature monitoring assembly are arranged on the outer wall of the refrigerant pipeline in a contact mode. According to the refrigerant pipeline stress-strain monitoring system provided by the invention, the problem of cross sensitivity of strain and temperature in a fiber bragg grating sensor is solved through the strain monitoring assembly and the temperature monitoring assembly which are arranged adjacently, and the accuracy and reliability of measurement are improved through a temperature compensation or decoupling technology; the actual stress-strain value of the refrigerant pipeline is obtained; the method has the advantages of high strain sensitivity, high measurement precision and the like, and the measurement result is more accurate. As the monitoring position, close to the refrigerant pipeline, of the fiber bragg grating monitoring assembly is of an optical system structure, electric sparks are not generated, and potential safety hazards such as explosion are not generated.

Description

Technical Field

[0001] This application relates to the field of monitoring technology, and in particular to a refrigerant pipeline stress-strain monitoring system, air conditioning equipment, and refrigeration equipment. Background Technology

[0002] During the operation of equipment such as air conditioners and refrigerators, refrigerant is often transported between the compressor and heat exchangers (such as evaporators and condensers) through refrigerant pipelines, thus forming a refrigerant circulation loop.

[0003] During equipment operation, refrigerant pipelines are prone to vibration. If the vibration amplitude or frequency is too large, it will significantly reduce the service life of the pipelines. Therefore, it is necessary to continuously monitor the stress and strain of the refrigerant pipelines during equipment operation, and adjust the compressor operating frequency in real time according to the stress and strain status of the pipelines to reduce pipeline stress and strain, reduce pipeline vibration, and prevent premature fatigue failure of the refrigerant pipelines, which would lead to a reduced service life.

[0004] Traditional stress-strain measurement methods involve placing strain gauges on the outer surface of each pipe, which can effectively monitor the stress and strain of air conditioning pipes. However, these methods have the following drawbacks:

[0005] First, strain gauges have poor performance in measuring stress and strain, with low measurement accuracy and large errors.

[0006] Secondly, strain gauges have a slow response to changes in stress and strain, which can easily lead to inaccurate measurements, resulting in untimely warnings and adjustments for excessive stress and strain, and causing equipment malfunctions or damage.

[0007] Third, strain gauges are electrical sensors, and their circuitry may generate electrical sparks during operation. Since refrigerant is present in the refrigerant pipeline, if flammable and explosive refrigerant is used, an explosion may occur if there is a refrigerant leak in the pipeline when the strain gauge is used to measure the stress and strain of the pipeline, posing a safety hazard. Utility Model Content

[0008] This application provides a refrigerant pipeline stress-strain monitoring system, air conditioning equipment, and refrigeration equipment to solve the technical problem that the monitoring effect of strain gauges in the prior art is poor and there are safety hazards.

[0009] In a first aspect, this application provides a refrigerant pipeline stress-strain monitoring system, comprising:

[0010] A fiber optic grating monitoring component, comprising an adjacent strain monitoring component and a temperature monitoring component;

[0011] The refrigerant piping, strain monitoring components, and temperature monitoring components are all installed in contact with the outer wall of the refrigerant piping.

[0012] Optionally, the strain monitoring component includes a first optical fiber and a first grid region, the first grid region being disposed on the first optical fiber, and the extension direction of the first optical fiber being parallel to or at an angle to the axis of the refrigerant pipeline.

[0013] Optionally, the first optical fiber is wound around the outer wall of the refrigerant pipeline.

[0014] Optionally, a plurality of first grid regions are provided along the extension direction of the first optical fiber.

[0015] Optionally, the temperature monitoring component includes a second optical fiber, a second grating region, and a capillary tube. The second grating region is disposed on the second optical fiber, and the capillary tube is sleeved on the outside of the second grating region. There is a preset gap between the second grating region and the inner wall of the capillary tube.

[0016] Optionally, the axis of the second gate region coincides with the axis of the capillary.

[0017] Optionally, the diameter of the capillary is 5 to 20 times the diameter of the second optical fiber.

[0018] Optionally, a plurality of second grating regions and a plurality of capillaries are provided along the extension direction of the second optical fiber, with the plurality of second grating regions and the plurality of capillaries being arranged in a one-to-one correspondence.

[0019] Optionally, the refrigerant pipeline stress and strain monitoring system also includes an optical fiber adjustment device and a controller. The optical fiber adjustment device is connected to the fiber optic grating monitoring component and the controller respectively, so as to adjust the stress and strain of the refrigerant pipeline through the controller.

[0020] Optionally, the number of fiber Bragg grating monitoring components may be multiple.

[0021] Secondly, this application provides an air conditioning device, including the refrigerant pipeline stress and strain monitoring system provided in the first aspect of this application.

[0022] Thirdly, this application provides a refrigeration device, including the refrigerant pipeline stress-strain monitoring system provided in the first aspect of this application.

[0023] The technical solutions provided in this application have the following advantages compared with the prior art:

[0024] The refrigerant pipeline stress-strain monitoring system provided in this application embodiment monitors the stress and strain of the refrigerant pipeline using a fiber optic grating monitoring component. It addresses the cross-sensitivity issue between strain and temperature in fiber optic grating sensors by using adjacent strain and temperature monitoring components. Furthermore, it improves the accuracy and reliability of the measurement through temperature compensation or decoupling techniques, thereby obtaining the actual stress and strain values ​​of the refrigerant pipeline. This system offers advantages such as high strain sensitivity and high measurement accuracy, resulting in more precise measurement results.

[0025] Meanwhile, since the fiber optic grating monitoring component is an optical system structure (i.e., optical fiber, grating area, etc.) located near the refrigerant pipeline, it will not generate electrical sparks. Its circuit system is connected through optical fiber and placed in an area far away from the refrigerant pipeline, so it will not cause safety hazards such as explosion of the refrigerant pipeline.

[0026] The air conditioning equipment and refrigeration equipment provided in this application both include the above-mentioned refrigerant pipeline stress and strain monitoring system. The stress and strain state of the refrigerant pipeline can be monitored in real time through the fiber optic grating monitoring component. Therefore, it naturally possesses the technical effects of the above-mentioned refrigerant pipeline stress and strain monitoring system. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0030] Figure 1 A partial structural diagram of the refrigerant pipeline stress-strain monitoring system provided in the embodiments of this application. Figure 1 ;

[0031] Figure 2 A partial structural diagram of the refrigerant pipeline stress-strain monitoring system provided in the embodiment. Figure 2 ;

[0032] Figure 3 A partial front view of the refrigerant pipeline stress-strain monitoring system provided in the embodiments of this application. Figure 1 ;

[0033] Figure 4 A partial front view of the refrigerant pipeline stress-strain monitoring system provided in the embodiments of this application. Figure 2 ;

[0034] Figure 5 A partial cross-sectional view of the temperature monitoring component provided in an embodiment of this application;

[0035] Figure 6This is a connection diagram of the refrigerant pipeline stress-strain monitoring system provided in an embodiment of this application;

[0036] Figure 7 The control flowchart of the refrigerant pipeline stress-strain monitoring system provided in the embodiments of this application is shown.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Strain monitoring component; 11. First optical fiber; 12. First grating region;

[0039] 2. Temperature monitoring component; 21. Second optical fiber; 22. Second grid region; 23. Capillary tube; 24. Connector;

[0040] 3. Refrigerant piping;

[0041] 4. Fiber optic modulation device;

[0042] 5. Controller. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0045] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0046] To address the technical problems of poor monitoring effect and safety hazards in existing technologies that use strain gauges to monitor the stress and strain of refrigerant pipe 3, this application provides a refrigerant pipe stress and strain monitoring system, air conditioning equipment, and refrigeration equipment. This refrigerant pipe stress and strain monitoring system uses a fiber optic grating monitoring component to monitor the stress and strain of the refrigerant pipe 3. Due to the high strain sensitivity and measurement accuracy of the fiber optic grating monitoring component, the measurement results are more accurate. At the same time, since the fiber optic grating monitoring component is an optical system structure (i.e., optical fiber, grating area, etc.) near the monitoring position of the refrigerant pipe 3, it will not generate electrical sparks. Its circuit system is connected via optical fiber, so it can be placed in an area far away from the refrigerant pipe 3, thus avoiding safety hazards such as explosion of the refrigerant pipe 3.

[0047] Please see Figures 1 to 7 The first aspect of this application provides a refrigerant pipeline stress-strain monitoring system, including a fiber optic grating monitoring component and a refrigerant pipeline 3, such as... Figures 1 to 4 As shown, the fiber optic grating monitoring component can be installed on the outer surface of the refrigerant pipe 3 to realize real-time monitoring of the stress and strain state of the refrigerant pipe 3.

[0048] It should be noted that fiber optic grating monitoring components are sensor components that utilize the wavelength-selective reflection of light caused by the periodic refractive index change as light propagates in an optical fiber. When a light wave propagating in the fiber encounters a grating, only light of a specific wavelength matching the grating's period is strongly reflected, while other wavelengths pass through the grating. When physical quantities change, such as temperature, stress, or strain, the period of the grating and the refractive index of the optical fiber change. This leads to a change in the wavelength reflected through the fiber optic grating. By measuring the change in the reflected wavelength, the change in the physical quantity affecting the grating can be calculated.

[0049] The fiber optic grating monitoring component includes a strain monitoring component 1 and a temperature monitoring component 2 arranged adjacent to each other. It can solve the problem of cross-sensitivity between strain and temperature in fiber optic grating sensors, and improve the accuracy and reliability of measurement through temperature compensation or decoupling technology, thereby obtaining the actual stress and strain value of the refrigerant pipeline 3.

[0050] It should be noted that, while ensuring that strain monitoring component 1 and temperature monitoring component 2 do not interfere with each other, strain monitoring component 1 and temperature monitoring component 2 should be placed as close as possible to achieve high-precision and high-reliability joint monitoring.

[0051] For temperature monitoring component 2, its reflected wavelength change is only affected by the temperature change at the measured location of refrigerant pipe 3; while for strain monitoring component 1, its reflected wavelength change is affected by both temperature and stress-strain changes. After decoupling the measurement data of strain monitoring component 1 and temperature monitoring component 2, the amount of change in reflected wavelength caused only by the magnitude and direction of stress-strain changes can be expressed by the following formula (1):

[0052]

[0053] Where Δλ is the change in center wavelength caused by stress and strain on the fiber grating; λ0 is the initial center wavelength when it is not affected by stress and strain; Cε is the strain sensitivity coefficient of the fiber grating; and Δε is the change in strain.

[0054] Both strain monitoring component 1 and temperature monitoring component 2 are installed in contact with the outer wall of refrigerant pipe 3. When the temperature and stress-strain at the measured location on refrigerant pipe 3 change, the changes can be directly transmitted to strain monitoring component 1 and temperature monitoring component 2 through the contact point. Since strain monitoring component 1 and temperature monitoring component 2 are installed adjacent to the measured location on refrigerant pipe 3, they can simultaneously measure the strain and temperature changes at the same location. The temperature monitoring data is used to compensate for the strain measurement, thereby eliminating the influence of temperature on the strain measurement through decoupling calculation.

[0055] It should be noted that, due to its advantages such as small size, light weight, resistance to electromagnetic interference, and corrosion resistance, the fiber optic grating monitoring component is suitable for stress and strain monitoring of refrigerant pipelines 3 with complex layouts (such as those with multiple bends). During the monitoring process, the strain monitoring component 1 and temperature monitoring component 2 of the fiber optic grating monitoring component are placed adjacent to each other at the measured location of the refrigerant pipeline 3. This allows for the decoupling of temperature and stress / strain to obtain the actual stress and strain conditions of the refrigerant pipeline 3.

[0056] When monitoring with the fiber optic grating monitoring component, it can quickly respond to the stress and strain changes in the refrigerant pipe 3 by changing the reflected wavelength, and the monitoring accuracy is high. Moreover, the circuit part of the fiber optic grating monitoring component can be connected to the refrigerant pipe 3 by optical fiber, avoiding potential safety hazards. It can solve the problems of inaccurate stress and strain measurement, slow response to stress and strain changes, and low safety of traditional strain gauges.

[0057] In some embodiments of this application, please refer to Figures 1 to 4 The strain monitoring component 1 includes a first optical fiber 11 and a first grating region 12. The first grating region 12 is disposed on the first optical fiber 11. When the measuring light wave is transmitted in the first optical fiber 11, only light of a specific wavelength that matches the period of the first grating region 12 will be strongly reflected, while light of other wavelengths will pass through the first grating region 12.

[0058] When the temperature and / or stress-strain at the measured location of the refrigerant pipe 3 changes, the refractive index of the first optical fiber 11 of the first grid region 12 will also change, which will cause a change in the reflected wavelength of the strain monitoring component 1. By measuring the change in the reflected wavelength of the strain monitoring component 1, the change in the physical quantity experienced by the first grid region 12 can be calculated.

[0059] In some embodiments of this application, please refer to Figure 1 , Figure 3 and Figure 6 The first optical fiber 11 extends in a direction parallel to the axis of the refrigerant pipe 3, and the axial stress and strain of the refrigerant pipe 3 can be measured by the strain monitoring component 1.

[0060] In other embodiments of this application, please refer to Figure 2 and Figure 4 The first optical fiber 11 extends at an angle to the axis of the refrigerant pipe 3, allowing for the measurement of stress and strain in any direction of the refrigerant pipe 3. Furthermore, the stress and strain in any direction can be decomposed into axial stress and strain and circumferential stress and strain of the refrigerant pipe 3 according to the following formula:

[0061] △ε1=△εcos α (2)

[0062] △ε2=△εsinα (3)

[0063] Wherein, Δε1 is the axial strain change of the refrigerant pipe 3, Δε2 is the circumferential strain change of the refrigerant pipe 3, and α is the angle between the extension direction of the first optical fiber 11 and the axial direction of the refrigerant pipe 3.

[0064] It should be noted that, in the above embodiments, in order to ensure the effectiveness of the joint monitoring by the strain monitoring component 1 and the temperature monitoring component 2, it is preferable to arrange the strain monitoring component 1 and the temperature monitoring component 2 in parallel on the outer wall of the refrigerant pipeline 3, such as... Figures 1 to 4 As shown. To avoid significant deviations in the placement of strain monitoring component 1 and temperature monitoring component 2, which could affect the accuracy of decoupling calculations and lead to measurement errors.

[0065] In some embodiments of this application, please refer to Figure 2 and Figure 4 The first optical fiber 11 is wound around the outer wall of the refrigerant pipe 3, which can achieve a tight fit between the first optical fiber 11 and the outer wall of the refrigerant pipe 3, thereby enabling the first grid area 12 to be tightly fitted to the outer wall of the refrigerant pipe 3, and enabling precise monitoring of strain and temperature along the pipe.

[0066] Meanwhile, the first optical fiber 11 is a flexible component and is tightly wound around the outer wall of the refrigerant pipe 3, which can adapt to different pipe diameters and shapes, and can realize the convenient installation of the strain monitoring component 1 on the refrigerant pipe 3.

[0067] In some embodiments of this application, please refer to Figure 3 and Figure 4 Multiple first grid areas 12 are provided along the extension direction of the first optical fiber 11. Distributed measurement of multiple measured positions on the refrigerant pipeline 3 can be achieved through the same strain monitoring component 1. The stress and strain change status monitoring of multiple measured positions can be realized, thereby reducing the monitoring cost of the refrigerant pipeline 3.

[0068] In some embodiments of this application, please refer to Figures 1 to 5 The temperature monitoring component 2 includes a second optical fiber 21, a second grid region 22, and a capillary tube 23. The second grid region 22 is disposed on the second optical fiber 21, and the capillary tube 23 is sleeved on the outside of the second grid region 22. The capillary tube 23 is in contact with the refrigerant pipeline 3. While isolating the stress and strain changes of the refrigerant pipeline 3, it only realizes the transmission of temperature. This makes the temperature monitoring component 2 sensitive only to the temperature changes of the refrigerant pipeline 3 and unaffected by the stress and strain of the refrigerant pipeline 3. This allows for subsequent decoupling calculation of the strain monitoring data through the monitoring data of the temperature monitoring component 2.

[0069] Please see Figure 5A preset gap exists between the second grid region 22 and the inner wall of the capillary tube 23. This prevents the second grid region 22 from directly contacting the inner wall of the capillary tube 23. When the wall of the capillary tube 23 is affected by stress and strain changes on the outer wall of the refrigerant pipe 3, it prevents the inner wall of the capillary tube 23 from transmitting stress and strain changes to the second grid region 22, thus avoiding the introduction of strain errors. By designing a preset gap between the second grid region 22 and the inner wall of the capillary tube 23, the second grid region 22 can respond only to temperature changes, avoiding external force interference, and improving the accuracy and reliability of temperature monitoring data.

[0070] In some embodiments of this application, please refer to Figure 5 The axis of the second grid region 22 coincides with the axis of the capillary tube 23, which allows the second grid region 22 to be located in the central region of the capillary tube 23, thereby forming a uniform annular air gap around the second grid region 22. Heat is then conducted through the capillary tube 23 to form a uniform temperature field around the second grid region 22, thereby improving the temperature monitoring accuracy of the temperature monitoring component 2.

[0071] In some embodiments of this application, please refer to Figure 5 The diameter of the capillary 23 is 5 to 20 times the diameter of the second optical fiber 21, so that there is a suitable preset gap between the outer surface of the second gate region 22 and the inner wall of the capillary 23, which can ensure the heat conduction efficiency between the capillary 23 and the second gate region 22 and reduce the cost and volume of the temperature monitoring component 2.

[0072] Specifically, when the diameter of the capillary 23 is less than 5 times the diameter of the second optical fiber 21, the preset gap between the inner wall of the capillary 23 and the second grid region 22 is small, which poses a risk of contact and can easily introduce strain errors.

[0073] When the diameter of the capillary 23 is more than 20 times the diameter of the second optical fiber 21, the size of the capillary 23 will be larger, which will make the heat conduction path between the second gate region 22 and the wall of the capillary 23 longer, reduce the heat transfer efficiency, and cause the temperature response of the second gate region 22 to lag.

[0074] In some embodiments of this application, please refer to Figure 5 Connectors 24 are provided at both ends of the capillary 23 to achieve a relatively fixed connection between the capillary 23 and the second optical fiber 21, so as to avoid relative positional changes between the second grid region 22 and the inner wall of the capillary 23, and to ensure that there is a stable preset gap between the second grid region 22 and the inner wall of the capillary 23, thereby forming a uniform annular temperature field.

[0075] In some embodiments of this application, the connector 24 and the capillary tube 23 can be connected by means of threaded connection, snap-fit ​​connection or other means, and the middle part of the connector 24 is provided with a through hole for inserting the second optical fiber 21.

[0076] In some other embodiments of this application, the connector 24 is an injection molded part. By injecting liquid material (such as epoxy resin) into both ends of the capillary 23 and curing it, the connector 24 is formed, thereby realizing the encapsulation of the second gate region 22 by the capillary 23, so that the light wave reflection in the second gate region 22 is only affected by the temperature change inside the capillary 23.

[0077] It should be noted that in the above embodiments, both the refrigerant pipe 3 and the capillary tube 23 are made of thermally conductive materials (such as metals), which can reduce the temperature measurement error of the temperature monitoring component 2, thereby ensuring the accuracy of the decoupling calculation and improving the accuracy of the final obtained stress-strain state.

[0078] In some embodiments of this application, the refrigerant pipe 3 and the capillary tube 23 can be relatively fixedly connected by welding, bonding, epoxy resin connection or other means. The refrigerant pipe 3 directly transfers heat to the capillary tube 23 and forms a uniform temperature field inside the capillary tube 23, which can ensure the accuracy of temperature measurement of the second grid region 22 at the measured position.

[0079] In some embodiments of this application, please refer to Figure 3 and Figure 4 Multiple second grid regions 22 and multiple capillary tubes 23 are provided along the extension direction of the second optical fiber 21. The multiple second grid regions 22 and multiple capillary tubes 23 are set one-to-one. Distributed measurement of multiple measured positions on the refrigerant pipeline 3 can be realized through the same temperature monitoring component 2. Temperature change monitoring of multiple measured positions can be realized, thereby reducing the monitoring cost of the refrigerant pipeline 3.

[0080] In some embodiments of this application, please refer to Figure 3 and Figure 4 The multiple first grid regions 12 in the strain monitoring component 1 are correspondingly set with the multiple second grid regions 22 (or multiple capillaries 23) in the temperature monitoring component 2, so that the actual stress and strain of each measured position can be obtained by decoupling temperature and stress and strain.

[0081] In some embodiments of this application, please refer to Figure 6 The refrigerant pipeline stress and strain monitoring system also includes an optical fiber adjustment device 4 and a controller 5. The optical fiber adjustment device 4 is connected to the fiber optic grating monitoring component and the controller 5 respectively. The optical fiber adjustment device 4 can accurately control the working state of the fiber optic grating monitoring component to ensure its stable and efficient operation, and output the monitoring data of the fiber optic grating monitoring component to the controller 5. The controller 5 can then adjust the stress and strain of the refrigerant pipeline 3 to prevent the actual stress and strain value of the refrigerant pipeline 3 from exceeding the preset threshold, which could lead to damage to the refrigerant pipeline 3 or equipment failure.

[0082] It should be noted that the controller 5 can adjust the stress and strain of the refrigerant pipeline 3 by adjusting the compressor frequency, adjusting the compressor speed, adjusting the flow rate or flow rate inside the refrigerant pipeline 3, etc. As long as the actual stress and strain value of the refrigerant pipeline 3 is prevented from exceeding the preset threshold, the purpose of this application can be achieved.

[0083] In some embodiments of this application, there are multiple fiber optic grating monitoring components, which can monitor the refrigerant pipeline 3 in multiple pipelines, multiple points, and multiple directions. This enables the monitoring of stress and strain data across the entire refrigerant pipeline 3, and improves the monitoring range through distributed measurement technology, thus avoiding monitoring blind spots.

[0084] The fiber optic demodulation device 4 has multiple signal connection channels, which can be connected to multiple fiber optic grating monitoring components. The fiber optic demodulation device outputs the signals to the controller 5, which then performs real-time feedback control of the air conditioner based on the input signals.

[0085] Please see Figures 1 to 7 The second aspect of this application provides an air conditioning device, including the refrigerant pipeline stress and strain monitoring system described in the above embodiments. The system can monitor the stress and strain state of the air conditioning pipeline (i.e., refrigerant pipeline 3) in real time through a fiber optic grating monitoring component, which can prevent the air conditioning pipeline from being damaged or leaking due to vibration and reduce the failure rate of the air conditioning device.

[0086] In some embodiments of this application, please refer to Figure 7 Controller 5 is the air conditioning controller in the air conditioning equipment. When the stress and strain state of the refrigerant pipe 3 (i.e. the air conditioning pipe) changes, the stress and strain monitoring information and temperature monitoring information are obtained through the fiber optic grating monitoring component. The fiber optic adjustment device converts the light signal reflected back by the fiber optic grating into an electrical signal and transmits it to the air conditioning controller through the data line. The actual stress and strain value is determined through decoupling calculation. The air conditioning controller can then make real-time feedback control based on the monitored actual stress and strain value.

[0087] In some embodiments of this application, when the actual stress and strain value is less than a preset threshold, the air conditioning equipment operates normally and the stress and strain condition is continuously monitored by a fiber optic grating monitoring component.

[0088] In some other embodiments of this application, when the actual stress-strain value is greater than or equal to a preset threshold, the compressor frequency can be reduced by the controller 5 to reduce the vibration of the refrigerant pipeline 3; if the actual stress-strain value is too large, the compressor can also be stopped directly by the controller 5 to prevent the unit from being damaged due to excessive stress-strain.

[0089] It should be noted that in the above embodiments, the air conditioning equipment can be heat pump air conditioners, central air conditioners, split air conditioners, etc., all of which can realize real-time monitoring and real-time feedback control of the stress and strain state of the air conditioning pipeline through the refrigerant pipeline stress and strain monitoring system, which can reduce the stress and strain of the pipeline in a timely manner, so that the performance and reliability of the unit are in the optimal state.

[0090] Please see Figures 1 to 7 The third aspect of this application provides a refrigeration device, including the refrigerant pipeline stress and strain monitoring system described in the above embodiments. The system can monitor the stress and strain state of the refrigerant pipeline 3 in real time through a fiber optic grating monitoring component, which can prevent the refrigerant pipeline 3 from being damaged or leaking due to vibration, thereby reducing the failure rate of the refrigeration device.

[0091] It should be noted that the refrigeration equipment can be refrigerators, freezers, ice makers, etc., and can all achieve real-time monitoring and feedback control of the stress and strain state of the refrigerant pipeline through the refrigerant pipeline stress and strain monitoring system, so as to ensure the normal operation of refrigerant circulation and refrigeration equipment.

[0092] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0093] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0094] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A refrigerant pipeline stress-strain monitoring system, characterized in that, include: A fiber optic grating monitoring component, comprising a strain monitoring component (1) and a temperature monitoring component (2) arranged adjacent to each other; The refrigerant pipeline (3) has both the strain monitoring component (1) and the temperature monitoring component (2) in contact with the outer wall of the refrigerant pipeline (3).

2. The refrigerant pipeline stress-strain monitoring system according to claim 1, characterized in that, The strain monitoring component (1) includes a first optical fiber (11) and a first grid area (12). The first grid area (12) is disposed on the first optical fiber (11). The extension direction of the first optical fiber (11) is parallel to or at an angle to the axis of the refrigerant pipeline (3).

3. The refrigerant pipeline stress-strain monitoring system according to claim 2, characterized in that, The first optical fiber (11) is wound around the outer wall of the refrigerant pipe (3).

4. The refrigerant pipeline stress-strain monitoring system according to claim 2, characterized in that, A plurality of first grid regions (12) are provided along the extension direction of the first optical fiber (11).

5. The refrigerant pipeline stress-strain monitoring system according to any one of claims 1 to 4, characterized in that, The temperature monitoring component (2) includes a second optical fiber (21), a second grid region (22) and a capillary tube (23). The second grid region (22) is disposed on the second optical fiber (21), and the capillary tube (23) is sleeved on the outside of the second grid region (22). There is a preset gap between the second grid region (22) and the inner wall of the capillary tube (23).

6. The refrigerant pipeline stress-strain monitoring system according to claim 5, characterized in that, The axis of the second gate region (22) coincides with the axis of the capillary (23).

7. The refrigerant pipeline stress-strain monitoring system according to claim 5, characterized in that, The diameter of the capillary (23) is 5 to 20 times the diameter of the second optical fiber (21).

8. The refrigerant pipeline stress-strain monitoring system according to claim 5, characterized in that, A plurality of second gate regions (22) and a plurality of capillaries (23) are provided along the extension direction of the second optical fiber (21), and the plurality of second gate regions (22) and the plurality of capillaries (23) are arranged in a one-to-one correspondence.

9. The refrigerant pipeline stress-strain monitoring system according to any one of claims 1 to 4, characterized in that, It also includes an optical fiber adjustment device (4) and a controller (5). The optical fiber adjustment device (4) is connected to the fiber optic grating monitoring component and the controller (5) respectively, so as to realize the stress and strain adjustment of the refrigerant pipeline (3) through the controller (5).

10. The refrigerant pipeline stress-strain monitoring system according to claim 9, characterized in that, The number of fiber optic grating monitoring components is multiple.

11. An air conditioning device, characterized in that, Includes the refrigerant pipeline stress and strain monitoring system as described in any one of claims 1 to 10.

12. A refrigeration device, characterized in that, Includes the refrigerant pipeline stress and strain monitoring system as described in any one of claims 1 to 10.

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