A memory alloy type self-adjusting mechanism detection method and detection system

Abstract

This invention relates to a method and system for detecting a shape memory alloy self-adjusting mechanism. The method includes providing a self-adjusting mechanism comprising a core tube and constituent parts disposed within the core tube. The core tube includes an observation area that exposes at least some of the constituent parts for direct observation. The method involves placing the self-adjusting mechanism and a corresponding heat exchanger into a heat-insulated test chamber. An intake air path is connected to a cooling working air path to circulate air through the heat exchanger to initiate cooling. A measurement module measures the deformation and / or displacement of the constituent parts within the self-adjusting mechanism through the transparent outer wall of the test chamber and obtains the detection results. This method allows for direct measurement of the constituent parts within the core tube, eliminating the need for estimation methods, ensuring accurate results, reducing the difficulty of process debugging, and improving the quality control of the cooler.

Description

Technical Field

[0001] This invention relates to the field of cryogenic refrigeration, and in particular to a detection method and system for a shape memory alloy self-adjusting mechanism. Background Technology

[0002] The self-adjusting mechanism is one of the key structures in a self-adjusting refrigerator for controlling the throttling flow rate. In recent years, scholars at home and abroad have conducted extensive research on the structural parameters and operating parameters that affect the performance of the self-adjusting mechanism. However, existing research results have not yet effectively solved the problem of poor stability caused by the intermittent liquid spraying of the refrigerator due to unreasonable design of the self-adjusting mechanism. Especially when the gas cylinder is the gas source, as the pressure inside the cylinder gradually decreases, the position of the refrigerator valve needle changes continuously with the inlet pressure and the movement of the self-adjusting mechanism, resulting in unstable problems such as reduced flow rate or even flow fluctuations.

[0003] Because the self-adjusting mechanism is located in a sealed cavity at the center of the refrigerator, its valve needle opening cannot be tested. The position of the self-adjusting structure can only be adjusted by using a nut on one side, and the valve needle position can be roughly estimated based on the stiffness of the three springs in the self-adjusting structure. It is impossible to analyze the relationship between the opening and the refrigerator's flow rate. Especially for refrigerators with fluctuating flow rates, the movement state of the self-adjusting structure cannot be obtained, leading to frequent flow rate deviations and significant difficulties in process debugging. Furthermore, the self-adjusting mechanism is surrounded by multiple layers of finned tubes, with a large amount of metal structure, making it impossible to analyze its internal operation using equipment such as industrial CT scanners. Simultaneously, its internal temperature is unknown, making it impossible to analyze the temperature requirements of the shape memory alloy spring's phase transition point. Therefore, the instability of the self-adjusting mechanism's internal state, coupled with the difficulty in testing and debugging, easily leads to unstable refrigerator operation. Summary of the Invention

[0004] The purpose of this invention is to propose a detection method and system for a shape memory alloy self-adjusting mechanism, in order to solve the problem that the instability of the internal state of the self-adjusting mechanism, coupled with the difficulty in testing and debugging, easily leads to the instability of the refrigerator's operation.

[0005] The detection method for the shape memory alloy self-adjusting mechanism of the present invention includes:

[0006] A self-adjusting mechanism is provided, the self-adjusting mechanism including a core tube and components disposed within the core tube, the core tube including an observation area that exposes at least a portion of the components within the core tube so that they can be directly observed;

[0007] The self-adjusting mechanism and its corresponding heat exchanger are placed in an insulated test chamber; the test chamber is used to accommodate the self-adjusting mechanism and has a chamber entrance and a transparent outer wall; the chamber entrance is used for placing the self-adjusting mechanism and its corresponding heat exchanger into the test chamber; the self-adjusting mechanism inside the test chamber can be observed through the transparent outer wall.

[0008] Connect the intake air passage to the refrigeration working air passage, and ventilate the heat exchanger to start refrigeration;

[0009] The deformation and / or displacement of the constituent parts within the self-adjusting mechanism are measured through the transparent outer wall of the test chamber by the measurement module, and the test results are obtained.

[0010] Optionally, the observation area includes a hollowed-out area on the core tube.

[0011] Optionally, before connecting the intake air passage to the refrigeration working air passage and ventilating the heat exchanger, the method further includes:

[0012] An isolation structure is provided, which is located between the inner wall of the air intake passage and the test chamber, filling the gap between the air intake passage and the test chamber.

[0013] Optionally, the step of measuring the deformation or displacement of the component parts within the self-adjusting mechanism through the transparent outer wall of the test chamber using a measurement module and obtaining the detection result includes:

[0014] The opening degree of the valve needle in the self-adjusting mechanism is measured by the measurement module;

[0015] Record the flow rate of the refrigeration working gas path and the opening degree of the valve needle at the corresponding flow rate to obtain the relationship between the flow rate and the opening degree of the valve needle.

[0016] Optionally, the step of measuring the deformation or displacement of the component parts within the self-adjusting mechanism through the transparent outer wall of the test chamber using a measurement module and obtaining the detection result includes:

[0017] The position of the target part within the self-adjusting mechanism is measured using a measurement module.

[0018] The deformation of the target part is determined based on its position and its initial position;

[0019] Record the intake pressure and flow rate to obtain the relationship between the deformation of the target part and the intake pressure and flow rate.

[0020] Optionally, the test chamber is also equipped with a temperature sensor.

[0021] After connecting the intake air passage to the refrigeration working air passage and ventilating the heat exchanger, the process further includes:

[0022] The temperature inside the test chamber is obtained and recorded using the temperature sensor.

[0023] Optionally, the step of measuring the deformation or displacement of the component parts within the self-adjusting mechanism through the transparent outer wall of the test chamber using a measurement module and obtaining the detection result includes:

[0024] The position of the shape memory alloy spring within the self-adjusting mechanism is monitored using a measurement module.

[0025] When the position of the shape memory alloy spring changes, the temperature value is recorded as the phase transition point of the shape memory alloy spring.

[0026] Optionally, the outer wall of the test chamber includes any of the following structures:

[0027] The outer wall includes a sealing interlayer and a heat insulation material disposed in the sealing interlayer;

[0028] The outer wall includes an outer wall body and a heat insulation layer disposed on the outer wall body;

[0029] The outer wall is made of heat-insulating material.

[0030] Optionally, the measurement module includes at least one of an optical displacement measuring instrument and an image acquisition device.

[0031] On the other hand, the present invention also provides a detection system for a shape memory alloy self-adjusting mechanism, comprising:

[0032] The self-adjusting mechanism under test includes a core tube and components disposed within the core tube. The core tube includes an observation area that exposes at least a portion of the components within the core tube so that they can be directly observed.

[0033] A heat-insulated test chamber is provided to house the self-adjusting mechanism and has a chamber entrance and a transparent outer wall. The chamber entrance is used for placing the self-adjusting mechanism and a corresponding heat exchanger into the test chamber. The self-adjusting mechanism inside the test chamber can be observed through the transparent outer wall.

[0034] The heat exchanger and the refrigeration working air circuit cooperate with the self-adjusting mechanism;

[0035] A measurement module is used to measure the deformation and / or displacement of the constituent parts within the self-adjusting mechanism through the transparent outer wall of the test chamber.

[0036] The present invention discloses a testing method for a shape memory alloy self-adjusting mechanism. This method simulates refrigeration operation by placing the self-adjusting mechanism and its corresponding heat exchanger within an insulated test chamber and ventilating it. An observation area is provided on the core tube of the self-adjusting mechanism, and the transparent outer wall of the test chamber allows direct external observation of the components inside the core tube. This makes the test data more closely resemble the operating environment of the refrigerator, which is beneficial for the design and analysis of shape memory alloy refrigerators. The operation is simple and quick. Furthermore, it allows direct measurement of the components inside the core tube, eliminating the need for estimation methods, ensuring accurate results, reducing the difficulty of process debugging, and improving the quality control of the refrigerator. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the basic process of the detection method for the shape memory alloy self-adjusting mechanism in this embodiment;

[0038] Figure 2 This is an internal schematic diagram of the shape memory alloy self-adjusting mechanism during testing in this embodiment.

[0039] Figure 3 This is a schematic diagram of the hollowed-out core tube of the shape memory alloy self-adjusting mechanism in this embodiment;

[0040] Figure 4 This is a schematic diagram showing the shape memory alloy self-adjusting mechanism being installed in the test chamber before testing, as described in this embodiment.

[0041] Figure 5 for Figure 4 A schematic diagram after refrigeration;

[0042] Figure 6 This is a schematic diagram of the measurement module in this embodiment;

[0043] Figure 7 This is a detailed flowchart illustrating the detection method for the shape memory alloy self-adjusting mechanism in this embodiment. Figure 1 ;

[0044] Figure 8 This is a detailed flowchart illustrating the detection method for the shape memory alloy self-adjusting mechanism in this embodiment. Figure 2 ;

[0045] Figure 9 This is a detailed flowchart illustrating the detection method for the shape memory alloy self-adjusting mechanism in this embodiment. Figure 3 ;

[0046] Explanation of reference numerals in the attached figures:

[0047] 1-Inlet air path; 2-Isolation structure; 3-Heat exchanger; 4-Test chamber; 5-Valve body; 6-Throttle orifice; 7-Balance spring; 8-Memory alloy spring; 9-Valve needle; 10-Active spring; 11-Opening screw rod; 12-Temperature sensor; 13-Core tube; 14-Observation area; 15-Refrigeration working air path; 16-Measurement module; 17-Screen. Detailed Implementation

[0048] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0050] Example 1:

[0051] This embodiment provides a testing method for shape memory alloy self-adjusting mechanisms, addressing the problem of difficult testing and debugging of shape memory alloy coolers, and the difficulty in obtaining accurate test results. For example... Figure 1 As shown, the method in this embodiment includes, but is not limited to, the following steps:

[0052] S101. A self-adjusting mechanism is provided, the self-adjusting mechanism including a core tube and components disposed within the core tube, the core tube including an observation area that exposes at least a portion of the components within the core tube so that they can be directly observed.

[0053] The core tube 13 of the self-adjusting mechanism is a structure that houses its component parts, and its interior has a cavity for placing the component parts. In this embodiment, the core tube 13 of the self-adjusting mechanism also has an observation area 14, which is used to expose at least part of the component parts inside the core tube 13 so that they can be directly observed.

[0054] In some embodiments, the observation area 14 can be a cutout area on the core tube 13, which can be one or more cutout portions, allowing one or more component parts to be seen. In some other embodiments, the observation area 14 can also be an area provided with a transparent material, allowing at least some of the component parts inside the core tube 13 to be seen. Of course, the core tube 13 of the self-adjusting mechanism can also be configured to be entirely transparent, in which case the entire area would be the observation area 14, and all component parts could be seen.

[0055] See Figure 2 As shown, the main components of the self-adjusting mechanism include a shape memory alloy spring 8, an active spring 10, a balance spring 7, a valve needle 9, and a valve body 5. In practical applications, the self-adjusting mechanism can also be implemented with other structures; this embodiment does not limit the other structural components and forms of the self-adjusting mechanism. See also... Figures 3 to 5 As shown, a portion of the core tube 13 is hollowed out to form an observation area 14, where at least some of the component parts can be seen, thus meeting the requirements for measurement. See also Figure 4 and Figure 5 It is evident that after cooling, the deformation and displacement of the components within the self-adjusting mechanism can be directly observed.

[0056] Because the shape memory alloy self-adjusting mechanism uses components made of shape memory alloy material, the contraction amount of each shape memory alloy spring is inconsistent, making it difficult to estimate its accurate state and hindering subsequent debugging. The detection method for the shape memory alloy self-adjusting mechanism of this invention can reliably and effectively measure the state of the components in the self-adjusting mechanism under working conditions, thereby providing reliable data support for subsequent debugging.

[0057] S102. Place the self-adjusting mechanism and the corresponding heat exchanger into the insulated test chamber.

[0058] Test chamber 4 is used to house the self-adjusting mechanism and the corresponding heat exchanger 3, and has a chamber inlet and a transparent outer wall. The chamber inlet allows the self-adjusting mechanism and the corresponding heat exchanger 3 to be placed into test chamber 4. The self-adjusting mechanism inside test chamber 4 can be observed through the transparent outer wall.

[0059] The heat exchanger 3 is adapted to the self-adjusting mechanism, and the test chamber 4 is also matched with the heat exchanger 3 and the self-adjusting mechanism. In practical applications, the structure of the heat exchanger 3 with different inner diameters and fins can be set, and the test chamber 4 with the matching shape of the heat exchanger 3 and the self-adjusting mechanism can be used to meet the test requirements of different inlet pressures and flow rates.

[0060] S103. Connect the intake air passage to the refrigeration working air passage to ventilate the heat exchanger.

[0061] After the air inlet passage 1 of the heat exchanger 3 is connected to the refrigeration working air passage 15, a high-pressure fluid can be introduced for cooling. The refrigeration working air passage 15 is a passage that can introduce a high-pressure fluid, including but not limited to nitrogen, argon, and other fluids that can be used for cooling. For example, its pressure range can be from 15MPa to 50MPa. When the high-pressure fluid is introduced for cooling, the self-adjusting mechanism will enter the working state. At this time, it is equivalent to simulating the normal operation of the refrigerator.

[0062] S104. The deformation or displacement of the components in the self-adjusting mechanism is measured through the transparent outer wall of the test chamber by the measurement module, and the test results are obtained.

[0063] Because the outer wall of the test chamber 4 is transparent and the core tube 13 has an observation area 14, the state of the components inside the core tube 13 can be directly observed from the outside. The deformation or displacement of the components can be measured using optical measuring instruments.

[0064] The measurement module 16 may include various optical measuring instruments to achieve measurement without contact. In this embodiment, the measurement module 16 includes at least one of an optical displacement measuring instrument and an image acquisition device. For example, it may include a CCD (charge-coupled device) camera or other cameras, a displacement magnification instrument, a distance testing device utilizing the optical lever principle, etc. Deformation and / or displacement can be measured by taking pictures or other principles. The measurement methods using the measurement module 16 include, but are not limited to, image recognition, optical lever magnification, laser ranging, etc.

[0065] like Figure 6 As shown, in this embodiment, the test chamber 4 containing the self-adjusting mechanism can be placed on the workbench corresponding to the measurement module 16, and the test chamber 4 can be fixed so that the measurement module 16 can accurately align with the self-adjusting mechanism inside for measurement. The measurement module 16 can be connected to a computer to record measurement data, and the captured images and / or measured data can be displayed on the screen 17.

[0066] As can be seen, the testing method for the shape memory alloy self-adjusting mechanism in this embodiment simulates refrigeration operation by placing the self-adjusting mechanism and its corresponding heat exchanger 3 into an insulated test chamber 4 and ventilating it. An observation area 14 is provided on the core tube 13 of the self-adjusting mechanism, and the transparent outer wall of the test chamber 4 allows direct observation of the components inside the core tube 13 from the outside. This makes the test data closer to the operating environment of the refrigerator, which is beneficial for the design and analysis of shape memory alloy refrigerators. The operation is simple and quick. Furthermore, it can directly measure the components inside the core tube 13 without relying on estimation methods, ensuring accurate results, reducing the difficulty of process debugging, and improving the quality control of the refrigerator.

[0067] In some embodiments, before the intake air passage 1 is connected to the cooling working air passage 15 and the heat exchanger 3 is ventilated, an isolation structure 2 is provided, which is located between the inner wall of the intake air passage 1 and the test chamber 4, filling the gap between the intake air passage 1 and the test chamber 4.

[0068] The isolation structure 2 is located between the inner wall of the air inlet passage 1 and the test chamber 4, filling the gap between them. The isolation structure 2 prevents the cryogenic fluid from flowing out along the wall, which would prevent the fluid from passing through the heat exchange fins, reduce the heat exchange capacity of the heat exchanger 3, and cause the self-adjusting mechanism to fail. By setting the isolation structure 2, the operation during the test can be made more stable, closer to the actual refrigeration operation, and the accuracy of the results can be guaranteed.

[0069] The isolation structure 2 can be pre-installed on the inner wall of the test chamber 4 or outside the heat exchanger 3, or it can be inserted between the air inlet passage 1 and the inner wall of the test chamber 4 after the self-adjusting mechanism and the corresponding heat exchanger 3 are placed into the insulated test chamber 4. In practical applications, the isolation structure 2 can adopt a structure that facilitates wall-mounted installation, resulting in better isolation performance.

[0070] In some implementations, see Figure 7 As shown, the measurement module 16 measures the deformation or displacement of the components within the self-adjusting mechanism through the transparent outer wall of the test chamber 4 and obtains the test results, including:

[0071] S201. Measure the opening degree of the valve needle in the self-adjusting mechanism through the measurement module;

[0072] The opening degree of valve needle 9 is the distance from the tip of valve needle 9 to the throttling orifice 6. First, tighten the opening screw 11 to push valve needle 9 to close the central air hole of valve body 5, and record the initial position of valve needle 9. During the cooling process, the shape memory alloy spring 8 contracts when cooled, and the active spring 10 pushes valve needle 9 towards valve body 5. During this process, the opening degree of valve needle 9 will change. The opening degree can be obtained by measuring the displacement distance of valve needle 9 through the measuring module 16.

[0073] S202. Record the flow rate of the refrigeration working gas path and the opening degree of the valve needle at the corresponding flow rate to obtain the relationship between the flow rate and the opening degree of the valve needle.

[0074] In some implementations, see Figure 8 As shown, the measurement module 16 measures the deformation or displacement of the components within the self-adjusting mechanism through the transparent outer wall of the test chamber 4 and obtains the test results, including:

[0075] S301. Measure the position of the target part in the self-adjusting mechanism using the measurement module;

[0076] The target part is the part that needs to be inspected. In this example, the target parts include, but are not limited to, deformable parts such as shape memory alloy spring 8 and active spring 10.

[0077] S302. Determine the deformation of the target part based on its position and initial position;

[0078] Understandably, the initial position of the target part can be obtained before the test begins, before it starts to deform. The initial position of the target part can be the position of its end face. When it cools and contracts, the position of the end face of the target part will change. Based on the displacement distance before and after the change, the deformation can be obtained.

[0079] S303. Record the intake pressure and flow rate to obtain the relationship between the deformation of the target part and the intake pressure and flow rate.

[0080] To obtain the deformation under different intake pressures and flow rates, the intake pressure and flow rate can be changed during the test and continuously recorded to obtain the relationship between the deformation of the target part and the intake pressure and flow rate.

[0081] In some embodiments, a temperature sensor 12 is also provided inside the test chamber 4. After connecting the intake air passage 1 to the cooling working air passage 15 and ventilating the heat exchanger 3, the method further includes: acquiring and recording the temperature inside the test chamber 4 through the temperature sensor 12. By installing the temperature sensor 12 inside the test chamber 4, the temperature conditions during the testing process can be obtained, which helps determine whether the cooling process proceeds sequentially and provides data for performance testing of the components. The temperature sensor 12 can transmit data externally via wired or wireless means, for example, by connecting to a host computer via a data cable.

[0082] In some implementations, see Figure 9 As shown, the measurement module 16 measures the deformation or displacement of the components within the self-adjusting mechanism through the transparent outer wall of the test chamber 4 and obtains the test results, including:

[0083] S401. Monitor the position of the shape memory alloy spring in the self-adjusting mechanism through the measurement module;

[0084] S402. When the position of the shape memory alloy spring changes, record the temperature value as the phase transition point of the shape memory alloy spring.

[0085] It is understandable that if other devices made of shape memory alloy materials exist, phase transition point detection can also be performed in the same way as in this embodiment.

[0086] See Table 1 below for test data of the components of the self-adjusting mechanism. As the opening of valve needle 9 decreases, the flow rate of the cooler also decreases, which is consistent with the flow rate phenomenon observed during actual operation of the cooler. This demonstrates that the detection method of the shape memory alloy self-adjusting mechanism in this embodiment can effectively achieve the purpose of measuring the opening of valve needle 9. It solves the problem that the initial state of valve needle 9 opening is fixed but the final opening is unknown due to the difference in deformation of each shape memory alloy device. It also enables the testing of the contraction amount and phase transition point temperature of the shape memory alloy spring 8.

[0087] Table 1

[0088]

[0089] As can be seen, the detection method of the shape memory alloy self-adjusting mechanism in this embodiment can detect multiple parameters of the self-adjusting mechanism and accurately obtain various test data, providing reliable data support for the subsequent debugging process, thereby improving the stability of the cooling capacity and flow rate of the shape memory alloy refrigerator. In practical applications, the detection method of the shape memory alloy self-adjusting mechanism of this invention can also be used to measure the deformation and / or displacement of other components within the self-adjusting mechanism, simply by providing an observation area 14 at the position corresponding to the component to be tested so that it can be exposed and observed.

[0090] It should be understood that in practical applications, the items to be tested can be selected according to the needs of debugging. The measurement methods in the above examples can be used only at least one of them, or multiple data can be measured and recorded simultaneously.

[0091] In some embodiments, the outer wall of the test chamber 4 includes any of the following structures:

[0092] The outer wall includes a sealing interlayer and thermal insulation material disposed within the sealing interlayer;

[0093] The outer wall includes the outer wall body and the heat insulation layer provided on the outer wall body;

[0094] The outer wall is made of heat-insulating material.

[0095] Insulation materials and insulation layers include, but are not limited to, materials that can provide insulation, such as glass Dewars and insulating film materials, or structures made of these materials.

[0096] It is understood that, regardless of the structure of the outer wall of the test chamber 4, it is made of a transparent material, or at least partially transparent, to ensure that the self-adjusting mechanism inside the test chamber 4 can be seen. It is understood that transparency, as used in this application, refers to transparency sufficient for the measurement module 16 to measure the deformation and / or displacement of the components of the self-adjusting mechanism within it.

[0097] In addition, this invention also provides a detection system for a shape memory alloy self-adjusting mechanism, which includes a self-adjusting mechanism under test. The self-adjusting mechanism includes a core tube 13 and component parts disposed within the core tube 13. The core tube 13 includes an observation area 14 that exposes at least some of the component parts within the core tube 13 for direct observation. A heat-insulated test chamber 4 is used to accommodate the self-adjusting mechanism and has a chamber entrance and a transparent outer wall. The chamber entrance is used for placing the self-adjusting mechanism and a corresponding heat exchanger 3 into the test chamber 4. The self-adjusting mechanism inside the test chamber 4 can be observed through the transparent outer wall. A heat exchanger 3 that cooperates with the self-adjusting mechanism and a cooling working gas path 15 are also included. A measurement module 16 is used to measure the deformation and / or displacement of the component parts within the self-adjusting mechanism through the transparent outer wall of the test chamber 4.

[0098] The detection system for the shape memory alloy self-adjusting mechanism in this embodiment can be used to perform the detection process of the aforementioned detection method for shape memory alloy self-adjusting mechanisms. The various structures and their mating relationships can be referred to the description of the aforementioned detection method for shape memory alloy self-adjusting mechanisms, and will not be repeated here.

[0099] Furthermore, the core tube 13 of the self-adjusting mechanism can be a temporary core tube specifically used for measuring the data of its component parts. After testing, these component parts can be installed into a new core tube 13, or its hollowed-out areas can be treated to increase the stability of the self-adjusting mechanism. Of course, if the core tube 13 used during the testing process does not affect the stability of the self-adjusting mechanism, it can be used directly.

[0100] The aforementioned detection system for the shape memory alloy self-adjusting mechanism can simulate the working state during refrigeration, and the displacement and / or deformation of the components in the self-adjusting mechanism during refrigeration can be directly observed. The measurement module 16 can measure the actual values ​​of the displacement and / or deformation of the components during refrigeration. It is evident that the detection system for the shape memory alloy self-adjusting mechanism in this embodiment can directly measure the condition of the components within the core tube 13 without resorting to estimation methods, ensuring accurate results, reducing the difficulty of process debugging, and resulting in better quality control of the refrigerator.

[0101] Furthermore, although exemplary embodiments have been described herein, their scope includes any and all embodiments based on this disclosure that have equivalents, modifications, omissions, combinations (e.g., schemes involving intersections of various embodiments), adaptations, or changes. They are not limited to the examples described in this specification or during the implementation of this application, and such examples are to be interpreted as non-exclusive.

[0102] The above description is intended to be illustrative and not restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. Other embodiments can be used by those skilled in the art when reading the above description.

[0103] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the embodiments of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A detection method of a memory alloy type self-adjusting mechanism, characterized by, include: A self-adjusting mechanism is provided, the self-adjusting mechanism including a core tube and components disposed within the core tube, the components of the self-adjusting mechanism including a shape memory alloy spring, an active spring, a balance spring, a valve needle, and a valve body, the core tube including an observation area that exposes at least some of the components within the core tube so that they can be directly observed; The self-adjusting mechanism and its corresponding heat exchanger are placed in an insulated test chamber; the test chamber is used to accommodate the self-adjusting mechanism and has a chamber entrance and a transparent outer wall; the chamber entrance is used for placing the self-adjusting mechanism and its corresponding heat exchanger into the test chamber; the self-adjusting mechanism inside the test chamber can be observed through the transparent outer wall. Connect the intake air passage to the refrigeration working air passage, and ventilate the heat exchanger to start refrigeration; The deformation or displacement of the constituent parts within the self-adjusting mechanism is measured through the transparent outer wall of the test chamber by the measurement module, and the test results are obtained. The measurement of the deformation or displacement of the constituent parts within the self-adjusting mechanism through the transparent outer wall of the test chamber by the measurement module and the acquisition of the detection results include: The opening degree of the valve needle in the self-adjusting mechanism is measured by the measurement module; Record the flow rate of the refrigeration working gas path and the opening degree of the valve needle at the corresponding flow rate to obtain the relationship between the flow rate and the opening degree of the valve needle; The position of the target part within the self-adjusting mechanism is measured using a measurement module. The deformation of the target part is determined based on its position and its initial position; Record the intake pressure and flow rate to obtain the relationship between the deformation of the target part and the intake pressure and flow rate.

2. The detection method for the shape memory alloy self-adjusting mechanism as described in claim 1, characterized in that, The observation area includes a hollowed-out area on the core tube.

3. The detection method for the shape memory alloy self-adjusting mechanism as described in claim 1, characterized in that, Before connecting the intake air passage to the refrigeration working air passage and ventilating the heat exchanger, the method further includes: An isolation structure is provided, which is located between the inner wall of the air intake passage and the test chamber, filling the gap between the air intake passage and the test chamber.

4. The method of claim 1, wherein the memory alloy self-adjusting mechanism is a shape memory alloy (SMA) wire. The test chamber is also equipped with a temperature sensor. After connecting the intake air path to the cooling working air path and ventilating the heat exchanger, the method further includes: acquiring and recording the temperature inside the test chamber through the temperature sensor.

5. The detection method for the shape memory alloy self-adjusting mechanism as described in claim 4, characterized in that, The measurement of the deformation or displacement of the constituent parts within the self-adjusting mechanism through the transparent outer wall of the test chamber by the measurement module and the acquisition of the detection results include: The position of the shape memory alloy spring within the self-adjusting mechanism is monitored using a measurement module. When the position of the shape memory alloy spring changes, the temperature value is recorded as the phase transition point of the shape memory alloy spring.

6. The detection method for the shape memory alloy self-adjusting mechanism as described in claim 1, characterized in that, The outer wall of the test chamber includes any of the following structures: The outer wall includes a sealing interlayer and a heat insulation material disposed in the sealing interlayer; The outer wall includes an outer wall body and a heat insulation layer disposed on the outer wall body; The outer wall is made of heat-insulating material.

7. The method of claim 1, wherein the memory alloy self-adjusting mechanism is a shape memory alloy (SMA) wire. The measurement module includes at least one of an optical displacement measuring instrument and an image acquisition device.

8. A detection system for a memory alloy self-adjusting mechanism, characterized by, include: The self-adjusting mechanism under test includes a core tube and components disposed within the core tube. The components of the self-adjusting mechanism include a shape memory alloy spring, an active spring, a balance spring, a valve needle, and a valve body. The core tube includes an observation area that exposes at least some of the components within the core tube so that they can be directly observed. A heat-insulated test chamber is provided to house the self-adjusting mechanism and has a chamber entrance and a transparent outer wall. The chamber entrance is used for placing the self-adjusting mechanism and a corresponding heat exchanger into the test chamber. The self-adjusting mechanism inside the test chamber can be observed through the transparent outer wall. The heat exchanger and the refrigeration working air circuit cooperate with the self-adjusting mechanism; A measurement module is used to measure the deformation or displacement of the constituent parts within the self-adjusting mechanism through the transparent outer wall of the test chamber. The measurement module measures the deformation or displacement of the components within the self-adjusting mechanism through the transparent outer wall of the test chamber and obtains the detection results, including: The opening degree of the valve needle in the self-adjusting mechanism is measured by the measurement module; Record the flow rate of the refrigeration working gas path and the opening degree of the valve needle at the corresponding flow rate to obtain the relationship between the flow rate and the opening degree of the valve needle; The position of the target part within the self-adjusting mechanism is measured using a measurement module. The deformation of the target part is determined based on its position and its initial position; Record the intake pressure and flow rate to obtain the relationship between the deformation of the target part and the intake pressure and flow rate.

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