Detection method and detection device for cold solder joint defect of cooler

Abstract

The invention relates to a detection method and a detection device for a cold solder joint defect of a cooler, and the detection method comprises the steps: putting the cooler into a test cavity, and sealing the test cavity; the cooler is filled with compressed gas through a compressor; sound generated by the cooler filled with the compressed gas is collected through a sound sensor, and detection sound is obtained; comparing the detection sound with a pre-calibrated standard sound through a controller, and judging whether the detection sound is abnormal or not; according to the invention, whether the cold solder joint defect exists in the cooler or not can be directly detected according to whether the sound comparison is abnormal or not, so that subjective factor interference during manual detection is avoided, the detection accuracy is improved, and the operation in the detection process is simple.

Description

Technical Field

[0001] The present application relates to the technical field of workpiece defect detection, and in particular to a method and device for detecting cold solder joint defects in a cooler. Background Art

[0002] A cooler is a cooling device used to cool a vehicle's transmission system, engine system, or other system that requires heat dissipation. Its main function is to transfer the heat of the structure to be cooled to an external medium (usually air or coolant) through a heat exchange process, thereby keeping the temperature of the structure to be cooled within the optimal working range and ensuring the normal operation of all vehicle components. Coolers mainly include automotive oil coolers, automotive water tanks, transmission coolers, condensers, evaporators, etc.

[0003] The cooler is generally made of an upper cover plate, a lower cover plate and a multi-layer chip located between the two cover plates, which are brazed together. If two adjacent chips are not brazed together, or the chip closest to the upper cover plate is not brazed together with the upper cover plate, and the chip closest to the lower cover plate is not brazed together with the lower cover plate, it is called a cold welding defect. For a cooler with a fin sandwiched between two adjacent chips, both sides of the middle fin need to be brazed together with the chip. If some of the fins are not brazed together with the chip, it is also called a cold welding defect. Cold welding defects will lead to the risk of leakage of the cooling medium, which will cause overheating of the car and cause various other faults.

[0004] The prior art generally adopts random sampling and bursting test to determine whether there is a cold solder defect in the cooler. The bursting test is to fill the product with water or oil medium several times higher than the test pressure until the product is deformed, and then dissect and observe the deformation to determine whether the product has a cold solder defect. However, relying on the human eye to judge whether the product is deformed is easily affected by subjective factors, especially when the deformation is not obvious enough, it is easy to miss the detection and misdetection, making the detection accuracy not high enough, and the cooler needs to be dried after the bursting test, which not only consumes a lot of water and electricity for the detection of cold solder defects, but also cannot guarantee the efficiency and accuracy of the detection, and the bursting test operation process is cumbersome, affecting the detection speed and efficiency of the production line. Summary of the invention

[0005] Based on this, it is necessary to provide a method and a device for detecting cooler cold soldering defects that are simple to operate and highly accurate.

[0006] A method for detecting a cold solder joint defect of a cooler is used to detect whether a cold solder joint defect exists in the cooler, comprising:

[0007] placing a cooler into a test cavity, and sealing the test cavity;

[0008] Filling the cooler with compressed gas through a compressor;

[0009] The sound generated by the cooler filled with compressed gas is collected by a sound sensor to obtain a detection sound;

[0010] The controller compares the detection sound with a pre-calibrated standard sound to determine whether the detection sound is abnormal;

[0011] If the detection sound is abnormal, the cooler has a cold soldering defect; if not, the cooler does not have a cold soldering defect.

[0012] Alternatively, if the detection sound is abnormal, the cooler does not have a cold soldering defect; if not, the cooler has a cold soldering defect.

[0013] In one of the embodiments, when calibrating the standard sound, a cooler without any cold solder joint defects is placed in the test cavity, and the test cavity is sealed, compressed air is filled into the cooler without any cold solder joint defects, and the sound generated by the cooler is collected to obtain the standard sound.

[0014] In one embodiment, the method of comparing the detection sound with a pre-calibrated standard sound by the controller to determine whether there is an abnormality in the detection sound is:

[0015] comparing the sound pressure level of the detection sound with the sound pressure level of the standard sound;

[0016] If the sound pressure level of the detection sound is higher than the sound pressure level of the standard sound, there is an abnormality in the detection sound, and if the sound pressure level of the detection sound is equal to or lower than the sound pressure level of the standard sound, there is no abnormality in the detection sound.

[0017] In one embodiment, the step of charging the cooler with compressed gas further comprises:

[0018] The actual pressure value in the cooler is monitored. When the actual pressure value reaches a preset pressure value, the compressed gas is stopped from being charged into the cooler, and the actual pressure value in the cooler is maintained for N seconds, wherein N is greater than zero.

[0019] In one embodiment, the cooler has a cooling medium outlet and a cooling medium inlet.

[0020] Before placing the cooler into the test chamber, the detection method further includes blocking one of the cooling medium outlet and the cooling medium inlet;

[0021] The cooler is placed in the test cavity, the compressor is connected to the other of the cooling medium outlet and the cooling medium inlet, so that the compressor is connected to the inside of the cooler through the cooling medium outlet or the cooling medium inlet, and the test cavity is sealed.

[0022] The present application also provides a device for detecting cold solder joint defects of a cooler, the device comprising:

[0023] A first box body, wherein a test cavity is provided inside the first box body, and the test cavity is used to accommodate a cooler;

[0024] A compressor, used for communicating with the interior of the cooler and charging compressed gas into the cooler;

[0025] A sound sensor is arranged in the test chamber and is used to collect the sound generated by the cooler filled with compressed gas and obtain the detection sound;

[0026] The controller is connected to the sound sensor for determining whether the cooler has a cold soldering defect according to the detection sound.

[0027] In one embodiment, the detection device further includes a second box body, the first box body is arranged inside the second box body, and a soundproof sealed cavity is enclosed between the first box body and the second box body, and the soundproof sealed cavity is not connected to the test cavity.

[0028] In one of the embodiments, the detection device further comprises a vacuum component, and the vacuum component is used to evacuate the soundproof sealing cavity;

[0029] The vacuum assembly includes a vacuum gauge and a vacuum pump. The vacuum pump is connected to the soundproof sealing cavity and is used to evacuate the soundproof sealing cavity. The vacuum gauge is used to detect the vacuum degree of the soundproof sealing cavity.

[0030] In one of the embodiments, the vacuum assembly further includes a vacuum valve, the vacuum pump is connected to the soundproof sealing cavity through a vacuum pipeline, and the vacuum valve is arranged on the pipeline between the vacuum pump and the soundproof sealing cavity.

[0031] In one of the embodiments, the vacuum assembly further includes a vacuum release valve, which is connected to the soundproof sealing chamber and is used to release the vacuum state of the soundproof sealing chamber.

[0032] In one embodiment, the exterior of the first box is provided with sound insulation material.

[0033] In one embodiment, the compressor is connected to the cooler via a high-pressure charging line;

[0034] The high-pressure inflation pipeline is provided with a high-pressure inflation valve, and the high-pressure inflation valve is located outside the first box.

[0035] In one of the embodiments, the cooler detection device further includes a high-pressure exhaust valve, which is connected to the interior of the cooler through a high-pressure exhaust pipeline and is used to discharge the compressed gas inside the cooler;

[0036] A first pressure sensor is also provided on the high-pressure exhaust pipeline. The first pressure sensor is used to detect the actual pressure value inside the cooler, and the first pressure sensor is communicatively connected with the controller.

[0037] Compared with the prior art, the method for detecting cold solder joint defects in a cooler provided by the present application, fills the cooler with compressed gas and collects the sound generated by the cooler when the compressed gas is filled. If there is a cold solder joint defect in the cooler, adjacent chips or between the chip and the cover plate and between the chip and the fins at the location of the cold solder joint defect in the cooler may be torn due to the filling of compressed gas, thereby generating abnormal sounds. The present application compares the collected detection sound with a pre-calibrated standard sound, and can directly detect whether there is a cold solder joint defect in the cooler based on the result of the sound comparison, thereby avoiding interference from subjective factors during manual detection, improving the detection accuracy, and simplifying the operation during the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 A schematic diagram of the structure of a device for detecting cold solder joint defects in a cooler according to an embodiment of the present application;

[0040] Figure 2 It is a structural schematic diagram of a cooler cold soldering defect detection device of an embodiment of the present application having a second box body;

[0041] Figure 3 It is a structural schematic diagram of a cooler cold soldering defect detection device of another embodiment of the present application having a second box body;

[0042] Figure 4 It is a schematic structural diagram of a cooler cold soldering defect detection device according to an embodiment of the present application having a third box body.

[0043] Reference numerals:

[0044] 10. Detection device;

[0045] 110. first box; 111. test chamber;

[0046] 120, compressor; 121, high-pressure charging valve; 122, high-pressure exhaust valve; 123, first pressure sensor;

[0047] 130. Sound sensor;

[0048] 140. Controller;

[0049] 150, second box; 151, soundproof sealed chamber; 152, vacuum gauge; 153, vacuum pump; 154, vacuum valve; 155, vacuum release valve;

[0050] 160. Differential pressure leak detector;

[0051] 170, third box; 171, comparison chamber;

[0052] 180, low-pressure gas source; 181, low-pressure charging valve; 182, first low-pressure exhaust valve; 183, second pressure sensor; 184, second low-pressure exhaust valve; 185, third pressure sensor;

[0053] 20. Cooler. DETAILED DESCRIPTION

[0054] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0055] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0059] The present application provides a method for detecting a cold solder joint defect of a cooler, which is used to detect whether a cooler has a cold solder joint defect, and comprises the following steps:

[0060] Place the cooler into the test chamber and seal the test chamber;

[0061] Fill the cooler with compressed gas through the compressor;

[0062] The sound generated by the cooler filled with compressed gas is collected by a sound sensor, and a detection sound is obtained;

[0063] The controller compares the detected sound with a pre-calibrated standard sound to determine whether the detected sound is abnormal;

[0064] If the detection sound is abnormal, the cooler has a cold soldering defect; if not, the cooler does not have a cold soldering defect;

[0065] Alternatively, if the detection sound is abnormal, the cooler does not have a cold solder joint defect; if not, the cooler has a cold solder joint defect.

[0066] It should be noted that the above-mentioned cooler can be a cooler with fins sandwiched between adjacent chips, or a cooler without fins, such as a corrugated plate chip cooler or a point wave plate chip cooler. It can also be a cooler with fins arranged between the corrugated plate chips or a cooler with fins arranged between the corrugated plate chips. The present application does not impose any restrictions on this. As long as there is a channel for the flow of cooling medium between the chip in the cooler and the adjacent chip or cover plate or fin, the detection method provided in the present application can detect whether it has a cold soldering defect.

[0067] It is understandable that when there is a cold welding defect between adjacent chips of the cooler or between the chip and the cover plate or between the chip and the fin, when compressed air is charged into the cooler with the cold welding defect, the chip, fin or cover plate will be deformed, and the deformation of the chip, fin or cover plate will definitely produce sound, and the adjacent chips with the cold welding defect or between the chip and the cover plate or between the chip and the fin will also be torn due to the charging of compressed gas, and sound will also be produced at this time. When compressed air is charged into the cooler without the cold welding defect, since the pressure of the charged compressed gas is constant, the internal structure of each cooler without the cold welding defect is consistent, so the sound generated during the process of charging compressed air into the cooler without the cold welding defect is the same. Since the sound generated by the cooler with the cold welding defect and the cooler without the cold welding defect is different when the compressed gas is charged into the cooler, the sound generated by the cooler with the cold welding defect or the cooler without the cold welding defect can be calibrated to obtain a standard sound, and then the standard sound and the detection sound generated by the detected cooler are used to detect whether there is a cold welding defect in the cooler.

[0068] At this time, the chip is a corrugated plate or a dot wave plate, or a corrugated plate / dot wave plate with fins in the middle.

[0069] The present embodiment provides a method for detecting a cold solder joint defect in a cooler, by filling compressed gas into the cooler and collecting the sound generated by the cooler when the compressed gas is filled. If there is a cold solder joint defect in the cooler, adjacent chips at the location where the cold solder joint defect exists in the cooler, or between the chip and the cover plate, or between the chip and the fins may be torn due to the filling of compressed gas, thereby generating abnormal sounds. The present application compares the collected detection sound with a pre-calibrated standard sound, and can directly detect whether there is a cold solder joint defect in the cooler based on the result of the sound comparison, thereby avoiding interference from subjective factors during manual detection, improving the detection accuracy, and simplifying the operation during the detection process.

[0070] It can be understood that this embodiment places the cooler in a sealable test cavity, seals the test cavity, fills the cooler with compressed gas, and collects the detection sound emitted by the cooler in the test cavity. In this way, the test cavity can isolate external sounds, making the detection sound collected by the sound sensor more accurate.

[0071] Furthermore, the compressed gas filled into the cooler by the compressor is high-pressure gas, so that the cold weld defect can be deformed or torn more quickly, and the actual pressure value inside the cooler can reach the preset pressure value more quickly, shortening the time required for filling the high-pressure gas pressure, thereby improving the test efficiency. In other embodiments, the compressed gas filled into the cooler by the compressor can also be low-pressure gas, which is not limited in this application.

[0072] Schematically, a cooler without a cold solder joint defect can be used to calibrate the standard sound, and a cooler with a cold solder joint defect can also be used to calibrate the standard sound. In this way, the scope of application of the detection method in this embodiment can be improved. This application does not limit this. It is only necessary to determine the relationship between the detection sound and the standard sound and the meaning represented by the comparison result according to the standard sound. That is to say, when a cooler without a cold solder joint defect is used to calibrate the standard sound, the detection sound is compared with the standard sound. If the detection sound is abnormal, it means that the cooler has a cold solder joint defect; if the detection sound is not abnormal, the cooler does not have a cold solder joint defect; when a cooler with a cold solder joint defect is used to calibrate the standard sound, the detection sound is compared with the standard sound. If the detection sound is abnormal, it means that the cooler does not have a cold solder joint defect; if the detection sound is not abnormal, the cooler does not have a cold solder joint defect.

[0073] Furthermore, the standard sound may be selected from parameters such as sound pressure level (an indicator for measuring sound intensity, usually in decibels), frequency, waveform, voiceprint, sound intensity, etc., and this application does not impose any restrictions on this.

[0074] In one embodiment, when calibrating the standard sound, a cooler without a cold weld defect is placed in a test cavity, and the test cavity is sealed, and compressed air is then filled into the cooler without a cold weld defect, and the sound generated by the cooler is collected to obtain a standard sound. It is understandable that it is necessary to first obtain a cooler without a cold weld defect through other methods for detecting cold weld defects, such as a burst test, to ensure that the coolers used in the process of calibrating the standard sound do not have a cold weld defect, so as to ensure that there is a gap between the standard sound and the detection sound generated by the cooler with a cold weld defect, and to ensure that there is consistency between the standard sound and the detection sound generated by the cooler without a cold weld defect, thereby ensuring the accuracy of the standard sound.

[0075] Furthermore, when calibrating the standard sound, multiple coolers without cold solder joint defects can be used, and multiple sounds generated by multiple coolers can be collected in sequence, and the standard sound can be obtained after averaging the collected multiple audios, performing discrete data fitting and other operations. By repeatedly collecting sounds from multiple coolers without cold solder joint defects, the reliability of the obtained standard sound can be improved and the statistical effectiveness can be enhanced; and a reasonable error range of the standard sound can be established to avoid false detection, thereby improving the accuracy of the standard sound.

[0076] In one embodiment, the detection sound is compared with a pre-calibrated standard sound by a controller to determine whether there is an abnormality in the detection sound by comparing the sound pressure level of the detection sound with the sound pressure level of the standard sound; if the sound pressure level of the detection sound is higher than the sound pressure level of the standard sound, then there is an abnormality in the detection sound, and if the sound pressure level of the detection sound is equal to or lower than the sound pressure level of the standard sound, then there is no abnormality in the detection sound. It can be understood that the sound pressure level is a common indicator for measuring the intensity of sound, and the magnitude of the sound intensity can be directly expressed by a numerical value. In the detection method of this embodiment, it is possible to directly determine whether there is an abnormality between the standard sound and the detection sound by comparing the magnitude relationship between the numerical value of the standard sound and the numerical value of the detection sound. In this way, the method of determining whether there is an abnormality in the detection sound in the detection method is simplified.

[0077] In one embodiment, charging compressed gas into the cooler also includes monitoring the actual pressure value in the cooler, and when the actual pressure value reaches the preset pressure value, stopping charging compressed gas into the cooler, so that the cooler can be avoided from bursting. Further, the actual pressure value in the cooler is maintained for N seconds, wherein N is greater than zero. It is understandable that the adjacent chips of the cooler or between the chip and the cover plate or between the chip and the fin are not completely welded firmly at certain brazing positions, and in the process of charging compressed gas into the cooler, there is no tearing between the adjacent chips at the brazing position or between the chip and the cover plate or between the chip and the fin, and no abnormal sound is generated, but because the welding between the adjacent chips of the cooler or between the chip and the cover plate or between the chip and the fin at the brazing position is not strong, the adjacent chips at the welding position or between the chip and the cover plate or between the chip and the fin will tear during the process of maintaining the actual pressure value in the cooler, thereby generating abnormal sound. In this way, the detection method in this embodiment can not only detect the existing cold soldering defects in the cooler, but also detect whether the adjacent chips in the cooler or between the chip and the cover plate or between the chip and the fin are welded firmly, so as to prevent the cooler with loose welding from being put into use, and further prevent the cooler with loose welding from leaking the cooling medium during use, thereby improving the safety of the cooler.

[0078] In one embodiment, the cooler has a cooling medium outlet and a cooling medium inlet. Before the cooler is placed in the test cavity, the detection method in this embodiment also includes blocking one of the cooling medium outlet and the cooling medium inlet; then the cooler is placed in the test cavity, and the compressor is connected to the cooling medium outlet and the other of the cooling medium inlet, that is, the unblocked cooling medium outlet or the cooling medium inlet, so that the compressor is connected to the inside of the cooler through the cooling medium outlet or the cooling medium inlet, so that the inside of the cooler is a closed cavity. By blocking one of the cooling medium outlet and the cooling medium inlet in the cooler, and then using the compressor to connect the cooling medium outlet and the other of the cooling medium inlet, a closed cavity is formed inside the cooler. When compressed gas is filled into the cooler, the pressure inside the cooler increases faster, so that the judgment result is obtained faster, and then the detection result of the cooler cold welding defect is obtained faster. In this way, the detection efficiency of the cooler cold welding defect can be improved.

[0079] In one embodiment, when the compressed gas is charged into the cooler by the compressor, the pressure change in the test cavity is detected by the differential pressure leak detector. It is understandable that the compressor only charges the compressed gas into the cooler, and there is no other gas source to charge the gas into the sealed test cavity. If the cooler is completely sealed, then in the process of detecting the cold welding defect of the cooler, the compressed gas charged into the cooler is all inside the cooler, and will not escape from the cooler to the test cavity, and the pressure in the test cavity will not change; if the cooler is not completely sealed, then in the process of detecting the cold welding defect of the cooler, the compressed gas charged into the cooler will escape from the unsealed part to the test cavity, so that the pressure in the test cavity will change. Therefore, when detecting whether there is a cold welding defect in the cooler, the pressure in the test cavity can be detected by using a differential pressure leak detector to detect whether the pressure in the test cavity changes, so as to detect the sealing of the cooler at the same time. In this way, the detection method of the cold welding defect in the present embodiment can simultaneously detect whether there is a cold welding defect in the cooler and the sealing of the cooler, saving the detection process, thereby improving the detection efficiency.

[0080] Furthermore, when the compressed gas is filled into the cooler by the compressor, the pressure change between the unconnected test chamber and the comparison chamber is detected by the differential pressure leak detector. The compressor fills the cooler with high-pressure gas, and the low-pressure gas source simultaneously fills the unconnected test chamber and the comparison chamber with low-pressure gas. When the high-pressure gas is filled into the cooler by the compressor, if the cooler is not completely sealed, the high-pressure gas filled into the cooler will escape from the unsealed part to the test chamber filled with low-pressure gas, causing the pressure in the test chamber to change. And the high-pressure gas escapes into the test chamber filled with low-pressure gas, which can make the pressure change in the test chamber more obvious, making it easier for the differential pressure leak detector to detect the pressure change between the test chamber and the comparison chamber. Thereby improving the accuracy of the cooler sealing detection.

[0081] See also Figures 1 to 4 The present application also provides a device 10 for detecting a cold solder joint defect of a cooler 20, which is used to implement a method for detecting a cold solder joint defect of a cooler in any of the above embodiments. The detection device 10 includes:

[0082] A first box body 110, wherein a test cavity 111 is provided inside the first box body 110, and the test cavity 111 is used to accommodate the cooler 20;

[0083] The compressor 120 is used to communicate with the interior of the cooler 20 and charge the cooler 20 with compressed gas;

[0084] The sound sensor 130 is disposed in the test chamber 111 and is used to collect the sound generated by the cooler 20 filled with compressed gas and obtain the detection sound;

[0085] The controller 140 is in communication with the sound sensor 130 and is used to determine whether the cooler 20 has a cold soldering defect based on the detected sound.

[0086] It can be understood that the cooler 20 has a cooling medium inlet and a cooling medium outlet. The method of using the detection device 10 in this embodiment is: place the cooler 20 inside the test cavity 111 of the first box body 110, and before sealing the test cavity 111, block one of the cooling medium inlet and the cooling medium outlet, and use the compressor 120 to connect the other of the cooling medium inlet and the cooling medium outlet, so that the interior of the cooler 20 is a closed cavity; fill the cooler 20 with compressed gas through the compressor 120; collect the sound generated by the cooler 20 filled with compressed gas through the sound sensor 130, and obtain the detection sound; compare the detection sound with the pre-calibrated standard sound through the controller 140 to determine whether there is an abnormality in the detection sound, and confirm whether there is a cold soldering defect in the cooler 20 based on whether there is an abnormality.

[0087] The detection device 10 in this embodiment fills the cooler 20 with compressed gas, collects the sound generated by the cooler 20 filled with compressed gas through the sound sensor 130, obtains the detection sound, and then determines whether there is a cold soldering defect in the cooler 20 according to the detection sound through the controller 140, thereby avoiding the interference of subjective factors during manual detection, improving the accuracy of detection, and simplifying the operation during the detection process.

[0088] Illustratively, in one embodiment, a cooler without a cold solder joint defect can be used to calibrate the standard sound, and a cooler with a cold solder joint defect can also be used to calibrate the standard sound. This embodiment and the following embodiments are all explained by taking the use of a cooler without a cold solder joint defect to calibrate the standard sound as an example. The controller compares the detection sound with the pre-calibrated standard sound. If the detection sound is abnormal, it indicates that the cooler has a cold solder joint defect; if the detection sound is not abnormal, the cooler does not have a cold solder joint defect.

[0089] Furthermore, the compressor 120 fills the cooler 20 with high-pressure gas, so that the cold weld defects can be deformed or torn faster and the actual pressure value inside the cooler 20 can reach the preset pressure value faster, shortening the time required for filling with high-pressure gas, thereby improving testing efficiency.

[0090] Further, the first box body 110 has a bottom wall, a top wall and a first peripheral wall, the bottom wall and the top wall are respectively arranged at the two ends of the first peripheral wall, and the bottom wall and the top wall are respectively connected to the edge of one end of the first peripheral wall, so that the bottom wall, the top wall and the first peripheral wall surround the test cavity 111, and the sound sensor 130 can be arranged on the bottom wall, or on the top wall or the first peripheral wall, and the present application does not limit this, as long as the sound sensor 130 is arranged inside the test cavity 111. Only one sound sensor 130 can be arranged in the test cavity 111, or two or other numbers of sound sensors 130 can be arranged, and the present application does not limit this.

[0091] Furthermore, the controller 140 can be a calculator, a host computer, an industrial computer, an industrial computer, etc., and the present application does not impose any restrictions on this, as long as the controller 140 can communicate with the sound sensor 130, can store standard sounds, and can compare standard sounds with detection sounds.

[0092] Furthermore, a sound insulation material may be provided outside the first box 110, and the sound insulation material is coated on the outside of the first box 110 to prevent the noise in the external environment from interfering with the detection sound collected by the sound sensor 130, thereby improving the accuracy of the detection result. Schematically, the sound insulation material may be glass wool, or PU (polyurethane) foam, etc., and this application does not limit this, as long as it is a sound insulation material with the function of blocking or absorbing sound.

[0093] In one embodiment, see Figure 2 and Figure 3 The detection device 10 also includes a second box body 150, the first box body 110 is arranged inside the second box body 150, and a soundproof sealed cavity 151 is enclosed between the first box body 110 and the second box body 150, and the soundproof sealed cavity 151 is not connected to the test cavity 111. The soundproof sealed cavity 151 can prevent the noise in the external environment from interfering with the detection sound collected by the sound sensor 130, thereby improving the accuracy of the detection result. Furthermore, the soundproof sealed cavity 151 between the first box body 110 and the second box body 150 is filled with soundproof cotton, so that the sound insulation effect can be further improved to prevent the noise in the external environment from interfering with the detection sound collected by the sound sensor 130.

[0094] Furthermore, the second box body 150 has a second peripheral wall, and the second box body 150 and the first box body 110 share the same bottom wall and top wall, the bottom wall and the top wall are respectively arranged at the two ends of the second peripheral wall, and the two end edges of the second peripheral wall are respectively connected to the edges of the bottom wall and the top wall, so that a soundproof sealed cavity 151 is enclosed between the bottom wall, the top wall, the first peripheral wall and the second peripheral wall. In this way, the volume of the detection device 10 can be reduced, the material of the box can be saved, and the cost of the detection device 10 can be reduced.

[0095] In one embodiment, the detection device 10 further includes a vacuum component, which is used to evacuate the soundproof sealed cavity 151; the vacuum component includes a vacuum pump 153, which is connected to the soundproof sealed cavity 151 and is used to evacuate the soundproof sealed cavity 151, so that the soundproof sealed cavity 151 prevents noise in the external environment from entering the test cavity 111 in the form of a vacuum, thereby preventing the noise in the external environment from affecting the detection sound collected by the sound sensor 130. In this way, the accuracy of the detection device 10 in detecting the cold soldering defect of the cooler 20 can be improved.

[0096] Furthermore, the vacuum assembly also includes a vacuum gauge 152, which is used to detect the vacuum degree of the soundproof sealing cavity 151. This helps to determine whether the soundproof sealing cavity 151 is playing a soundproofing function, thereby helping to determine the accuracy of the detection device 10 in detecting the cold welding defect of the cooler 20.

[0097] Furthermore, the vacuum component also includes a vacuum valve 154, and the vacuum pump 153 is connected to the soundproof sealed chamber 151 through a vacuum pipeline. The vacuum valve 154 is arranged on the pipeline between the vacuum pump 153 and the soundproof sealed chamber 151. It can be understood that the vacuum valve 154 has an open and closed state, and the vacuum pump 153 also has an open and closed state. When the vacuum valve 154 and the vacuum pump 153 are in the open state at the same time, the vacuum component evacuates the soundproof sealed chamber 151; when the vacuum valve 154 is in the closed state, no matter whether the vacuum pump 153 is in the open state or in the closed state, it cannot operate on the soundproof sealed chamber 151. In this way, by controlling the state of the vacuum valve 154, the vacuum pump 153 can be prevented from performing erroneous operations on the soundproof sealed chamber 151.

[0098] In one embodiment, the vacuum assembly further includes a vacuum release valve 155, which is in communication with the soundproof sealed chamber 151 and is used to release the vacuum state of the soundproof sealed chamber 151. It is understandable that when the soundproof sealed chamber 151 is in a vacuum state, the vacuum state will generate suction on the top wall of the first box body 110, making it difficult to open the top wall. By setting the vacuum release valve 155 to release the vacuum state of the soundproof sealed chamber 151, it is possible to prevent the top wall from being unable to open due to the vacuum state in the soundproof sealed chamber 151.

[0099] Schematically, the vacuum release valve 155 can be connected to the soundproof sealing chamber 151 through a pipeline, such as Figure 3 As shown, the soundproof sealing chamber 151 can also be connected through a branch of the vacuum pipeline, such as Figure 2 As shown, the present application does not impose any limitation on this, as long as the vacuum release valve 155 can release the vacuum state of the soundproof sealing chamber 151 .

[0100] Furthermore, the vacuum relief valve 155 is connected to the soundproof sealed chamber 151 through a branch of the vacuum pipeline, and the vacuum gauge 152 is also connected to the branch of the vacuum pipeline, and is connected between the vacuum relief valve 155 and the soundproof sealed chamber 151. The reading of the vacuum gauge 152 can display the progress of vacuuming, the vacuum state, and the progress of releasing the vacuum state in the soundproof sealed chamber 151 in real time. In this way, the state in the soundproof sealed chamber 151 can be accurately and precisely reflected. And by sharing the vacuum pipeline, the production cost of the detection device 10 can be saved.

[0101] In one embodiment, the compressor 120 is connected to the cooler 20 through a high-pressure charging pipeline; a high-pressure charging valve 121 is provided on the high-pressure charging pipeline, and the high-pressure charging valve 121 is located outside the first box 110. It can be understood that the high-pressure charging valve 121 has an open and closed state, and the compressor 120 also has an open and closed state. When the high-pressure charging valve 121 and the compressor 120 are both in an open state, the compressor 120 can charge the inside of the cooler 20 with compressed gas; when the high-pressure charging valve 121 is in a closed state, no matter whether the compressor 120 is in an open state or a closed state, the inside of the cooler 20 cannot be charged with compressed gas. In this way, by controlling the state of the high-pressure charging valve 121, it is possible to prevent the compressor 120 from continuing to charge the inside of the cooler 20 with compressed gas when the preset pressure value is maintained in the cooler 20, thereby preventing the inside of the cooler 20 from being deformed or burst due to excessive charging of compressed gas.

[0102] Furthermore, the detection device 10 further includes a high-pressure exhaust valve 122, which is connected to the interior of the cooler 20 through a high-pressure exhaust pipeline and is used to discharge the compressed gas inside the cooler 20. In this way, the compressed gas inside the cooler 20 can be released in time.

[0103] Schematically, the high-pressure exhaust valve 122 can be directly connected to the interior of the cooler 20 through a high-pressure exhaust pipeline, or the high-pressure exhaust pipeline can be used as a branch of the high-pressure charging pipeline, so that the high-pressure exhaust valve 122 is connected to the interior of the cooler 20 through the high-pressure exhaust pipeline and the high-pressure charging pipeline. The present application does not impose any restrictions on this.

[0104] Furthermore, the high-pressure exhaust line is used as a branch of the high-pressure charging line, and the high-pressure exhaust valve 122 is connected to the inside of the cooler 20 through the high-pressure exhaust line and the high-pressure charging line. In this way, by sharing part of the high-pressure charging line, the length of the high-pressure exhaust line can be saved, thereby saving the production cost of the detection device 10. And by using the high-pressure exhaust line as a branch of the high-pressure charging line, it is only necessary to connect the high-pressure charging line to the cooler 20, and it is no longer necessary to connect the high-pressure exhaust line to the cooler 20, thereby simplifying the use process of the detection device 10 and improving the detection efficiency.

[0105] Furthermore, a first pressure sensor 123 is also provided on the high-pressure exhaust pipeline, and the first pressure sensor 123 is used to detect the actual pressure value inside the cooler 20, and the first pressure sensor 123 is connected to the controller 140. In this way, the actual pressure value inside the cooler 20 can be obtained through the first pressure sensor 123. When the actual pressure value reaches a preset pressure value, the compressed gas can be stopped from being filled into the cooler 20, so as to prevent the cooler 20 from being filled with too much compressed gas, thereby preventing the cooler 20 from bursting.

[0106] Furthermore, the high-pressure exhaust pipeline serves as a branch of the high-pressure charging pipeline, and the first pressure sensor 123 is arranged on the branch. In this way, it can be ensured that the compressor 120 charges the compressed air into the cooler 20, thereby ensuring the accuracy of the detection.

[0107] In one embodiment, see Figure 1 The detection device 10 also includes a differential pressure leak detector 160, which is in communication with the controller 140. The differential pressure leak detector 160 has at least one test end, one of which extends into the test cavity 111. The differential pressure leak detector 160 is used to detect pressure changes in the test cavity 111. It is understandable that the compressor 120 only injects compressed gas into the cooler 20, and there is no other gas source to fill the sealed test chamber 111 with gas. If the cooler 20 is completely sealed, then in the process of performing cold weld defect detection on the cooler 20, the compressed gas filled in the cooler 20 will all be inside the cooler 20 and will not escape from the cooler 20 to the test chamber 111, and the pressure in the test chamber 111 will not change; if the cooler 20 is not completely sealed, then in the process of performing cold weld defect detection on the cooler 20, the compressed gas filled in the cooler 20 will escape from the unsealed portion to the test chamber 111, causing the pressure in the test chamber 111 to change. When using the detection device 10 in this embodiment to test whether there is a cold weld defect in the cooler 20, a differential pressure leak detector 160 can be used to detect whether the pressure in the test chamber 111 changes to detect whether the cooler 20 is sealed. In this way, the same detection device 10 can be used to simultaneously detect whether there is a cold weld defect in the cooler 20 and the sealing of the cooler 20, thereby saving the cost of purchasing the detection device 10.

[0108] It is understandable that when the compressed gas is charged into the cooler 20 through the compressor 120, the sound sensor 130 can be made not to collect the detection sound, and only the differential pressure leak detector 160 is used to detect the pressure change in the test cavity 111. At this time, the detection device 10 only detects the sealing of the cooler 20, but does not detect whether there is a cold welding defect in the cooler 20. In this way, the function of the detection device 10 is increased, so that the same detection device 10 has multiple functions.

[0109] In one embodiment, see Figure 4, the detection device 10 also includes a third box 170 and a low-pressure gas source 180; a comparison chamber 171 is provided inside the third box 170, and the comparison chamber 171 is not connected to the test chamber 111; the low-pressure gas source 180 simultaneously connects the comparison chamber 171 and the test chamber 111 through a low-pressure gas charging pipeline; the differential pressure leak detector 160 has at least two test ends, one of which extends into the test chamber 111, and the other extends into the comparison chamber 171, and the differential pressure leak detector 160 is used to detect the pressure change between the test chamber 111 and the comparison chamber 171. The cooler 20 is filled with high-pressure gas, and the test chamber 111 and the comparison chamber 171 are filled with low-pressure gas. If the cooler 20 is not completely sealed, the high-pressure gas filled in the cooler 20 will escape from the unsealed part to the test chamber 111 filled with low-pressure gas, so that the pressure in the test chamber 111 will change. The high-pressure gas escapes into the test chamber 111 filled with low-pressure gas, which can make the pressure change in the test chamber 111 more obvious, making it easier for the differential pressure leak detector 160 to detect the pressure change between the test chamber 111 and the test chamber 111, thereby improving the accuracy of the sealing detection of the cooler 20.

[0110] In one embodiment, the low-pressure inflation pipeline has at least two low-pressure inflation branches, one of which is connected to the comparison chamber 171, and the other is connected to the test chamber 111; a low-pressure inflation valve 181 is also provided on the low-pressure inflation pipeline, and the low-pressure inflation valve 181 is provided on the low-pressure inflation pipeline between the low-pressure gas source 180 and the low-pressure inflation branch. It can be understood that the low-pressure inflation valve 181 has an open and closed state, and the low-pressure gas source 180 also has an open and closed state. When the low-pressure inflation valve 181 and the low-pressure gas source 180 are both in the open state, the low-pressure gas source 180 can fill the test chamber 111 and the comparison chamber 171 with compressed gas; when the low-pressure inflation valve 181 is in the closed state, no matter whether the low-pressure gas source 180 is in the open state or in the closed state, the test chamber 111 and the comparison chamber 171 cannot be filled with compressed gas. In this way, the pressure changes in the test chamber 111 and the comparison chamber 171 can be controlled simultaneously by controlling the state of the low-pressure inflation valve 181 .

[0111] In one embodiment, the detection device 10 further includes a first low-pressure exhaust valve 182 ， The first low-pressure exhaust valve 182 is connected to the test chamber 111 through the first low-pressure exhaust pipeline, so that the compressed gas inside the test chamber 111 can be released in time.

[0112] Schematically, the first low-pressure exhaust valve 182 can be directly connected to the interior of the test chamber 111 through the first low-pressure exhaust pipeline, or the first low-pressure exhaust pipeline can be used as a branch of the low-pressure inflation branch, so that the first low-pressure exhaust valve 182 is connected to the interior of the test chamber 111 through the first low-pressure exhaust pipeline and the low-pressure inflation branch. The present application does not impose any restrictions on this.

[0113] Furthermore, the first low-pressure exhaust pipeline is used as a branch of the low-pressure inflation branch, so that the first low-pressure exhaust valve 182 is connected to the inside of the test chamber 111 through the first low-pressure exhaust pipeline and the low-pressure inflation branch. In this way, by sharing part of the low-pressure inflation branch, the length of the first low-pressure exhaust pipeline can be saved, thereby saving the production cost of the detection device 10.

[0114] Furthermore, the detection device 10 further includes a second pressure sensor 183, which is disposed on the first low-pressure exhaust pipeline and is used to detect the pressure inside the test chamber 111, and the second pressure sensor 183 is communicatively connected to the controller 140. In this way, the real-time pressure value inside the test chamber 111 can be obtained through the second pressure sensor 183, which helps to determine whether the differential pressure leak detector 160 is working normally.

[0115] In one embodiment, the detection device 10 further includes a second low-pressure exhaust valve 184 ， The second low-pressure exhaust valve 184 is connected to the comparison chamber 171 through the second low-pressure exhaust pipeline. In this way, the compressed gas inside the comparison chamber 171 can be released in time. The second low-pressure exhaust valve 184 can be directly connected to the inside of the comparison chamber 171 through the second low-pressure exhaust pipeline, or the second low-pressure exhaust pipeline can be used as a branch of the low-pressure inflation branch, so that the second low-pressure exhaust valve 184 is connected to the inside of the comparison chamber 171 through the second low-pressure exhaust pipeline and the low-pressure inflation branch, and the present application does not limit this.

[0116] Furthermore, the second low-pressure exhaust pipeline is used as a branch of the low-pressure inflation branch, so that the second low-pressure exhaust valve 184 is connected to the inside of the comparison chamber 171 through the second low-pressure exhaust pipeline and the low-pressure inflation branch. In this way, by sharing part of the low-pressure inflation branch, the length of the second low-pressure exhaust pipeline can be saved, thereby saving the production cost of the detection device 10.

[0117] Furthermore, the detection device 10 further includes a third pressure sensor 185, which is disposed on the second low-pressure exhaust pipeline and is used to detect the pressure inside the comparison chamber 171, and the third pressure sensor 185 is communicatively connected to the controller 140. In this way, the real-time pressure value inside the test chamber 111 can be obtained through the third pressure sensor 185, which helps to determine whether the differential pressure leak detector 160 is working normally.

[0118] In summary, the detection device 10 provided by the present application can detect both the cold welding defects in the cooler 20 and the sealing of the cooler 20, thus increasing the function of the detection device 10, making it a multi-functional device, saving the cost of purchasing the detection device, and improving the applicability of the detection device. In addition, the detection device 10 provided by the present application can also detect the cold welding defects and the sealing of the cooler 20 at the same time, thus improving the detection efficiency and saving the production cost and the detection cost.

[0119] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0120] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A method for detecting a cold solder joint defect of a cooler, used to detect whether a cold solder joint defect exists in the cooler, characterized in that: include: placing a cooler into a test cavity, and sealing the test cavity; Filling the cooler with compressed gas through a compressor; The sound generated by the cooler filled with compressed gas is collected by a sound sensor to obtain a detection sound; The controller compares the detection sound with a pre-calibrated standard sound to determine whether the detection sound is abnormal; If the detection sound is abnormal, the cooler has a cold soldering defect; if not, the cooler does not have a cold soldering defect; Alternatively, if the detection sound is abnormal, the cooler does not have a cold soldering defect; if not, the cooler has a cold soldering defect.

2. The method for detecting cold solder joint defects of a cooler according to claim 1, characterized in that: When calibrating the standard sound, a cooler without any cold solder joint defects is placed in the test cavity, and the test cavity is sealed. Compressed air is filled into the cooler without any cold solder joint defects, and the sound generated by the cooler is collected to obtain the standard sound.

3. The method for detecting cold solder joint defects of a cooler according to claim 2, characterized in that: The method of comparing the detection sound with a pre-calibrated standard sound by the controller to determine whether there is an abnormality in the detection sound is: comparing the sound pressure level of the detection sound with the sound pressure level of the standard sound; If the sound pressure level of the detection sound is higher than the sound pressure level of the standard sound, there is an abnormality in the detection sound, and if the sound pressure level of the detection sound is equal to or lower than the sound pressure level of the standard sound, there is no abnormality in the detection sound.

4. The method for detecting cold solder joint defects of a cooler according to claim 1 or 3, characterized in that: The step of charging the interior of the cooler with compressed gas also includes: The actual pressure value in the cooler is monitored. When the actual pressure value reaches a preset pressure value, the compressed gas is stopped from being charged into the cooler, and the actual pressure value in the cooler is maintained for N seconds, wherein N is greater than zero.

5. The method for detecting cold solder joint defects of a cooler according to claim 1 or 2, characterized in that: The cooler has a cooling medium outlet and a cooling medium inlet, Before placing the cooler into the test chamber, the detection method further includes blocking one of the cooling medium outlet and the cooling medium inlet; The cooler is placed in the test cavity, the compressor is connected to the other of the cooling medium outlet and the cooling medium inlet, so that the compressor is connected to the inside of the cooler through the cooling medium outlet or the cooling medium inlet, and the test cavity is sealed.

6. A device for detecting cold solder joint defects of a cooler, characterized in that: The detection device comprises: A first box (110), wherein a test cavity (111) is provided inside the first box (110), and the test cavity (111) is used to accommodate a cooler (20); A compressor (120) is used to communicate with the interior of the cooler (20) and to charge compressed gas into the cooler (20); A sound sensor (130) is disposed in the test chamber (111) and is used to collect the sound generated by the cooler (20) filled with compressed gas and obtain a detection sound; The controller (140) is connected to the sound sensor (130) in communication, and is used to determine whether the cooler (20) has a cold soldering defect based on the detection sound.

7. The detection device according to claim 6, characterized in that: The detection device further comprises a second box body (150), the first box body (110) is arranged inside the second box body (150), and a soundproof sealed cavity (151) is enclosed between the first box body (110) and the second box body (150), and the soundproof sealed cavity (151) is not connected to the test cavity (111).

8. The detection device according to claim 7, characterized in that: The detection device further comprises a vacuum component, wherein the vacuum component is used to evacuate the soundproof sealing cavity (151); The vacuum assembly comprises a vacuum gauge (152) and a vacuum pump (153); the vacuum pump (153) is connected to the soundproof sealed cavity (151) and is used to evacuate the soundproof sealed cavity (151); and the vacuum gauge (152) is used to detect the vacuum degree of the soundproof sealed cavity (151).

9. The detection device according to claim 8, characterized in that: The vacuum assembly further comprises a vacuum valve (154); the vacuum pump (153) is connected to the soundproof sealing chamber (151) via a vacuum pipeline; and the vacuum valve (154) is arranged on the pipeline between the vacuum pump (153) and the soundproof sealing chamber (151).

10. The detection device according to claim 9, characterized in that: The vacuum assembly further comprises a vacuum release valve (155), wherein the vacuum release valve (155) is in communication with the soundproof sealing chamber (151) and is used for releasing the vacuum state of the soundproof sealing chamber (151).

11. The detection device according to claim 6, characterized in that: The outside of the first box (110) is provided with sound insulation material.

12. The detection device according to claim 6, characterized in that: The compressor (120) is connected to the cooler (20) via a high-pressure air charging pipeline; A high-pressure inflation valve (121) is provided on the high-pressure inflation pipeline, and the high-pressure inflation valve (121) is located outside the first box (110).

13. The detection device according to claim 12, characterized in that: The cooler (20) detection device further comprises a high-pressure exhaust valve (122), wherein the high-pressure exhaust valve (122) is connected to the interior of the cooler (20) via a high-pressure exhaust pipeline and is used to discharge compressed gas inside the cooler (20); A first pressure sensor (123) is also provided on the high-pressure exhaust pipeline, and the first pressure sensor (123) is used to detect the actual pressure value inside the cooler (20), and the first pressure sensor (123) is communicatively connected with the controller (140).

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