Detection device of cooler

Abstract

The utility model relates to a cooler detection device, and the device comprises a first box body which is internally provided with a test cavity, and the test cavity is used for accommodating a cooler; the compressor is used for communicating with the interior of the cooler and filling compressed gas into the cooler; the sound sensor is arranged in the test cavity and used for collecting sound generated by the cooler filled with the compressed gas and obtaining detection sound; the controller is in communication connection with the sound sensor and used for judging whether cold solder joint exists in the cooler or not according to the detection sound; and the pressure difference leak detector is provided with at least one test end, one test end of the pressure difference leak detector extends into the test cavity, and the pressure difference leak detector is used for detecting the pressure change in the test cavity. The cold solder joint defect and the sealing performance of the cooler can be detected at the same time, subjective factor interference during manual detection can be avoided by using the detection device, the detection accuracy is improved, and the detection cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of workpiece defect detection, and particularly relates to a detection device of a cooler. BACKGROUND

[0002] The cooler is a cooling device used for cooling a vehicle transmission device, an engine device or other devices needing heat dissipation. The main function of the cooler is to transfer heat of a structure to be cooled to an external medium (usually air or coolant) through a heat exchange process, so that the temperature of the structure to be cooled is kept within an optimal working range, and the normal operation of each part of the vehicle is ensured. The cooler mainly includes an automobile oil cooler, an automobile water tank, a gearbox cooler, a condenser, an evaporator and the like.

[0003] The cooler is generally composed of an upper cover plate, a lower cover plate and a plurality of layers of chips combined and brazed between the two cover plates. 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, or the chip closest to the lower cover plate is not brazed together with the lower cover plate, which is called a virtual welding defect. For the cooler with fins sandwiched between the two adjacent chips, the fins on both sides need to be brazed together with the chips. If part of the fins is not brazed together with the chips, it is also called a virtual welding defect. The virtual welding defect will cause the risk of leakage of the cooling medium, and further cause the overheating of the automobile and other various faults.

[0004] The prior art generally adopts sampling inspection for a burst test to determine whether there is a virtual welding defect in the cooler. The burst test is to fill the product with water or oil medium which is several times higher than the test pressure until the product is deformed, and the deformation is observed to determine whether the product has a virtual welding condition. However, it is easy to be affected by subjective factors to determine whether the product is deformed by the naked eye, especially in the case of not obvious deformation, which is easy to cause missed detection and false detection, so that the accuracy of detection is not high enough. Moreover, the cooler needs to be dried after the burst test, which not only consumes a large amount of water and electricity for the detection of virtual welding, but also cannot guarantee the efficiency and accuracy of the detection, and the operation process of the burst test is complicated, which affects the detection speed and efficiency of the production line.

[0005] Moreover, the cooler needs to be detected for sealing, but the existing detection device cannot detect the virtual welding defect and the sealing at the same time, and needs to be detected twice, which not only has low detection efficiency, but also needs to use two kinds of detection devices, resulting in the increase of detection cost. CONTENT OF THE UTILITY MODEL

[0006] Therefore, it is necessary to provide a detection device of a cooler which can detect virtual welding defects and sealing at the same time.

[0007] A detection device of a cooler, comprising:

[0008] a first box, wherein a test cavity is arranged inside the first box, and the test cavity is used for accommodating a cooler;

[0009] a compressor, which is used for communicating with the cooler and filling compressed gas into the cooler;

[0010] a sound sensor, which is arranged in the test cavity and used for collecting sound generated by the cooler filled with the compressed gas and obtaining a detected sound;

[0011] a controller, which is in communication connection with the sound sensor and used for judging whether the cooler has a false welding defect according to the detected sound;

[0012] a differential pressure leak detector, which has at least one test end, one of the test ends of the differential pressure leak detector extends into the test cavity, and the differential pressure leak detector is used for detecting pressure change in the test cavity.

[0013] In one of the embodiments, the detection device further comprises a second box, the first box is arranged inside the second box, and a soundproof sealed cavity is arranged between the first box and the second box, and the soundproof sealed cavity is not communicated with the test cavity.

[0014] In one of the embodiments, the detection device further comprises a vacuum assembly, which is used for vacuumizing the soundproof sealed cavity;

[0015] The vacuum assembly comprises a vacuum gauge and a vacuum pump, the vacuum pump is communicated with the soundproof sealed cavity and used for vacuumizing the soundproof sealed cavity, and the vacuum gauge is used for detecting vacuum degree of the soundproof sealed cavity;

[0016] The first box is externally provided with soundproof material.

[0017] In one of the embodiments, the vacuum assembly further comprises a vacuum valve, the vacuum pump is communicated with the soundproof sealed cavity through a pipeline, and the vacuum valve is arranged on the pipeline between the vacuum pump and the soundproof sealed cavity.

[0018] In one of the embodiments, the vacuum assembly further comprises a vacuum release valve, which is communicated with the soundproof sealed cavity and used for releasing vacuum state of the soundproof sealed cavity.

[0019] In one of the embodiments, the compressor is connected with the cooler through a high-pressure gas filling pipeline;

[0020] The high-pressure gas filling pipeline is provided with a high-pressure gas filling valve, and the high-pressure gas filling valve is arranged outside the first box.

[0021] In one of the embodiments, the detection device further comprises a high-pressure exhaust valve, which is in communication with the interior of the cooler through a high-pressure exhaust pipeline, and is used to exhaust compressed gas in the interior of the cooler.

[0022] A first pressure sensor is further arranged on the high-pressure exhaust pipeline, which is used to detect the actual pressure value in the interior of the cooler, and is in communication connection with the controller.

[0023] In one of the embodiments, the detection device further comprises a third box and a low-pressure gas source.

[0024] The third box is internally provided with a contrast cavity, which is not in communication with the test cavity; the low-pressure gas source is in communication with the contrast cavity and the test cavity through a low-pressure gas charging pipeline.

[0025] The differential pressure leak detector has at least two test ends, one of which extends into the test cavity, and the other of which extends into the contrast cavity, and is used to detect the pressure change in the test cavity and the contrast cavity.

[0026] In one of the embodiments, the low-pressure gas charging pipeline has at least two low-pressure gas charging branches, one of which is in communication with the contrast cavity, and the other of which is in communication with the test cavity.

[0027] A low-pressure gas charging valve is further arranged on the low-pressure gas charging pipeline between the low-pressure gas source and the low-pressure gas charging branches.

[0028] In one of the embodiments, the detection device further comprises a first low-pressure exhaust valve, a second low-pressure exhaust valve, a second pressure sensor and a third pressure sensor, the first low-pressure exhaust valve is in communication with the test cavity through a first low-pressure exhaust pipeline, and the second low-pressure exhaust valve is in communication with the contrast cavity through a second low-pressure exhaust pipeline.

[0029] The second pressure sensor is arranged on the first low-pressure exhaust pipeline, which is used to detect the pressure in the interior of the test cavity, and is in communication connection with the controller;

[0030] The third pressure sensor is arranged on the second low-pressure exhaust pipeline, which is used to detect the pressure in the interior of the contrast cavity, and is in communication connection with the controller.

[0031] Compared with the prior art, the cooler virtual welding detection device provided by the application fills compressed gas into the inside of the cooler through the compressor, if there is a virtual welding defect in the cooler, tearing will occur between the adjacent chips or between the chip and the cover plate or between the chip and the fin due to the filling of the compressed gas, and then abnormal sound will be generated, the sound sensor used in the application can collect the detection sound generated by the cooler when the compressed gas is filled, and the controller can determine whether the cooler has a virtual welding defect according to the detection sound, the detection device of the application can avoid the subjective factor interference in manual detection, improve the detection accuracy, and the operation of the detection device of the application is simple. In addition, the differential pressure leak detector is also provided, and the pressure change in the test cavity is detected. If the cooler is completely sealed, during the virtual welding defect detection of the cooler, the compressed gas filled into the cooler is all in the inside of the cooler and cannot escape from the cooler to the test cavity, so the pressure in the test cavity will not change; if the cooler is not completely sealed, during the virtual welding defect detection of the cooler, the compressed gas filled into the cooler will escape from the unsealed part to the test cavity, so that the pressure in the test cavity will change. Therefore, the sealing performance of the cooler can be detected by the differential pressure leak detector, that is, the same detection device can be used to detect whether the cooler has a virtual welding defect and the sealing performance of the cooler, and one machine can have multiple functions, thereby saving the cost of purchasing the detection device. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0033] Figure 1 The structure schematic diagram of the cooler virtual welding defect detection device of an embodiment of the application;

[0034] Figure 2 The structure schematic diagram of the cooler virtual welding defect detection device of an embodiment of the application with a second box;

[0035] Figure 3 The structure schematic diagram of the cooler virtual welding defect detection device of another embodiment of the application with a second box;

[0036] Figure 4 The structure schematic diagram of the cooler virtual welding defect detection device of an embodiment of the application with a third box.

[0037] Reference signs:

[0038] 10. A detection device;

[0039] 110. A first tank; 111. A test chamber;

[0040] 120. A compressor; 121. A high-pressure air charging valve; 122. A high-pressure air discharging valve; 123. A first pressure sensor;

[0041] 130. A sound sensor;

[0042] 140. A controller;

[0043] 150. A second tank; 151. A soundproof sealed chamber; 152. A vacuum gauge; 153. A vacuum pump; 154. A vacuum valve; 155. A vacuum releasing valve;

[0044] 160. A differential pressure leak detector;

[0045] 170. A third tank; 171. A contrast chamber;

[0046] 180. A low-pressure air source; 181. A low-pressure air charging valve; 182. A first low-pressure air discharging valve; 183. A second pressure sensor; 184. A second low-pressure air discharging valve; 185. A third pressure sensor;

[0047] 20. A cooler. DETAILED DESCRIPTION

[0048] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and one of ordinary skill in the art can make similar improvements without departing from the spirit of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0049] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be a middle component. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in the specification of the present application are for the purpose of illustration only and do not indicate the only implementation.

[0050] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited.

[0051] In the present application, unless otherwise explicitly specified and limited, the "on", "under", etc. of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "on" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0052] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0053] See Figures 1 to 4 The present application provides a detection device 10 of a cooler 20, the detection device 10 comprising:

[0054] A first box body 110 is internally provided with a test cavity 111, and the test cavity 111 is used to accommodate the cooler 20;

[0055] A compressor 120 is used to communicate with the inside of the cooler 20 and fill the cooler 20 with compressed gas;

[0056] A sound sensor 130 is arranged in the test cavity 111 and is used to collect the sound generated by the cooler 20 filled with compressed gas and obtain a detection sound;

[0057] A controller 140 is in communication connection with the sound sensor 130 and is used to judge whether the cooler 20 has a false welding defect according to the detection sound;

[0058] The detection device 10 further comprises a differential pressure leak detector 160, and the differential pressure leak detector 160 has at least one test end. One of the test ends of the differential pressure leak detector 160 extends into the test cavity 111, and the differential pressure leak detector 160 is used to detect the pressure change in the test cavity 111.

[0059] It should be noted that the above-mentioned cooler can be a cooler with fins between adjacent chips, can be a cooler without fins, such as a corrugated plate chip cooler or a point wave plate chip cooler, and can also be a cooler with fins between corrugated plate chips or a cooler with fins between corrugated plate chips. The present application does not limit this, as long as the chips in the cooler have a channel for the flow of cooling medium between the adjacent chips or cover plates or fins, and the detection method provided by the present application can detect whether there is a false solder defect.

[0060] It can be understood that the cooler 20 has a cooling medium inlet and a cooling medium outlet. The use method of the detection device 10 in the embodiment is to 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 connect the other one of the cooling medium inlet and the cooling medium outlet with the compressor 120, so that the inside of the cooler 20 is a closed cavity; fill compressed gas into the inside of the cooler 20 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 standard sound calibrated in advance through the controller 140 to determine whether the detection sound is abnormal, and determine whether there is a false solder defect in the cooler 20 according to whether there is an abnormality.

[0061] It can be understood that when there is a false solder defect between the adjacent chips or between the chip and the cover plate or between the chip and the fin of the cooler, the chip, the fin or the cover plate will be deformed when compressed air is filled into the cooler with false solder defect, and the deformation of the chip, the fin or the cover plate will certainly produce sound. The adjacent chips or the chip and the cover plate or the chip and the fin with false solder defect will also produce tearing due to the filling of compressed gas, which will also produce sound. When compressed air is filled into the cooler without false solder defect, the pressure of the filled compressed gas is constant, and the internal structure of each cooler without false solder defect is consistent, so the sound produced during the process of filling compressed air into the cooler without false solder defect is the same. Since the sound produced by the cooler with false solder defect and the cooler without false solder defect is different when compressed gas is filled into the cooler, the standard sound can be calibrated by the sound produced by the cooler with false solder defect or the cooler without false solder defect, and then the detection sound produced by the cooler with false solder defect or the cooler without false solder defect is detected according to the standard sound.

[0062] Therefore, the detection device 10 in the embodiment fills the compressed gas into the cooler 20, collects the sound generated by the cooler 20 filled with the compressed gas through the sound sensor 130 to obtain the detection sound, and judges whether the virtual welding defect exists in the cooler 20 according to the detection sound through the controller 140, so as to avoid the subjective factor interference in manual detection, improve the detection accuracy, and simplify the operation in the detection process.

[0063] Illustratively, in one embodiment, the cooler without the virtual welding defect can be used to calibrate the standard sound, and the cooler with the virtual welding defect can also be used to calibrate the standard sound. The embodiment and the following embodiments are explained by taking the cooler without the virtual welding defect as an example to calibrate the standard sound. The controller compares the detection sound with the standard sound calibrated in advance. If the detection sound is abnormal, it indicates that the cooler has the virtual welding defect. If the detection sound is not abnormal, the cooler does not have the virtual welding defect.

[0064] In addition, referring to Figure 1 Since the differential pressure leak detector 160 is further provided, the detection device 10 can detect the virtual welding defect and the sealing property of the cooler at the same time. It can be understood that the compressor 120 only fills the compressed gas into the cooler 20, and no other gas source fills the gas into the sealed test cavity 111. If the cooler 20 is completely sealed, the compressed gas filled into the cooler 20 is completely in the cooler 20 and cannot escape from the cooler 20 to the test cavity 111 during the detection of the virtual welding defect of the cooler 20, and the pressure in the test cavity 111 does not change. If the cooler 20 is not completely sealed, the compressed gas filled into the cooler 20 escapes from the unsealed part to the test cavity 111 during the detection of the virtual welding defect of the cooler 20, so that the pressure in the test cavity 111 changes. When the detection device 10 in the embodiment is used to detect whether the virtual welding defect exists in the cooler 20, the differential pressure leak detector 160 can be used to detect whether the pressure in the test cavity 111 changes to detect whether the cooler 20 is sealed. In this way, the same detection device 10 can be used to detect whether the virtual welding defect exists in the cooler 20 and the sealing property of the cooler 20, thereby saving the cost of purchasing the detection device 10.

[0065] It can be understood that when the compressor 120 fills the compressed gas into the cooler 20, the sound sensor 130 does not 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 property of the cooler 20, but does not detect whether the virtual welding defect exists in the cooler 20. In this way, the function of the detection device 10 is increased, and the same detection device 10 has multiple functions.

[0066] Further, the pressure differential leak detector 160 is in communication connection with the controller 140, which can directly make the controller 140 judge the sealing property of the cooler according to the reading change of the pressure differential leak detector 160, so that the test process can be further simplified.

[0067] Further, the compressor 120 fills the cooler 20 with high-pressure gas, so that the deformation or tearing of the virtual welding defect can be faster, and the actual pressure value inside the cooler 20 can reach the preset pressure value faster, thereby shortening the time required for filling high-pressure gas and improving the test efficiency.

[0068] 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 two ends of the first peripheral wall, and the bottom wall and the top wall are respectively connected to the edges of one end of the first peripheral wall, so as to form a test cavity 111 surrounded by the bottom wall, the top wall and the first peripheral wall. 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 number of sound sensors 130 can be arranged, and the present application does not limit this.

[0069] Further, the controller 140 can be a calculator, an upper computer, an industrial computer, an industrial control computer, etc., and the present application does not limit this as long as the controller 140 can be in communication connection with the sound sensor 130, can store the standard sound, and can compare the standard sound with the detected sound.

[0070] Further, sound insulation material can also be arranged outside the first box body 110, and the sound insulation material is wrapped outside the first box body 110 to avoid the noise in the external environment from interfering with the detected sound collected by the sound sensor 130, thereby improving the accuracy of the detection result. Illustratively, the sound insulation material can be glass wool, or PU (polyurethane) foam, etc., and the present application does not limit this as long as the sound insulation material has the function of blocking or absorbing sound.

[0071] In one embodiment, referring to Figure 2 and Figure 3The detection device 10 further comprises a second box 150, the first box 110 is arranged inside the second box 150, and a soundproof sealed cavity 151 is formed between the first box 110 and the second box 150, and the soundproof sealed cavity 151 is not communicated with 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. Further, the soundproof sealed cavity 151 between the first box 110 and the second box 150 is filled with soundproof material, so that the soundproof effect can be further improved to avoid the noise in the external environment from interfering with the detection sound collected by the sound sensor 130.

[0072] Further, the second box 150 has a second outer peripheral wall, and the second box 150 shares the same bottom wall and top wall with the first box 110, the bottom wall and the top wall are respectively arranged at two ends of the second outer peripheral wall, and the edges of the two ends of the second outer peripheral wall are respectively connected to the edges of the bottom wall and the top wall, so as to form the soundproof sealed cavity 151 between the bottom wall, the top wall, the first outer peripheral wall and the second outer 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.

[0073] In one embodiment, the detection device 10 further comprises a vacuum assembly for vacuumizing the soundproof sealed cavity 151; the vacuum assembly comprises a vacuum pump 153, the vacuum pump 153 is communicated with the soundproof sealed cavity 151, and is used for vacuumizing the soundproof sealed cavity 151, so that the soundproof sealed cavity 151 prevents the noise in the external environment from entering the test cavity 111 in the form of vacuum, thereby avoiding 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 false welding defects of the cooler 20 can be improved.

[0074] Further, the vacuum assembly further comprises a vacuum gauge 152, and the vacuum gauge 152 is used for detecting the vacuum degree of the soundproof sealed cavity 151. In this way, it is helpful to judge whether the soundproof sealed cavity 151 is playing a soundproof function, thereby helping to judge the accuracy of the detection device 10 in detecting the false welding defects of the cooler 20.

[0075] Further, the vacuum assembly further comprises a vacuum valve 154, the vacuum pump 153 is communicated with the soundproof sealed cavity 151 through a vacuum pipeline, and the vacuum valve 154 is arranged on the pipeline between the vacuum pump 153 and the soundproof sealed cavity 151. It can be understood that the vacuum valve 154 has an open state and a closed state, and the vacuum pump 153 also has an open state and a closed state. When the vacuum valve 154 and the vacuum pump 153 are in the open state at the same time, the vacuum assembly performs vacuumization on the soundproof sealed cavity 151; when the vacuum valve 154 is in the closed state, no matter the vacuum pump 153 is in the open state or in the closed state, the soundproof sealed cavity 151 cannot be operated. In this way, by controlling the state of the vacuum valve 154, the vacuum pump 153 can be prevented from being incorrectly operated on the soundproof sealed cavity 151.

[0076] In one embodiment, the vacuum assembly further comprises a vacuum release valve 155, which is communicated with the soundproof sealed cavity 151 and is used to release the vacuum state of the soundproof sealed cavity 151. It can be understood that when the soundproof sealed cavity 151 is in the vacuum state, the vacuum state will generate suction force on the top wall of the first cabinet 110, so that the top wall is difficult to open. By arranging the vacuum release valve 155 to release the vacuum state of the soundproof sealed cavity 151, the situation that the top wall cannot be opened due to the vacuum state in the soundproof sealed cavity 151 can be prevented.

[0077] Illustratively, the vacuum release valve 155 can be communicated with the soundproof sealed cavity 151 through a pipeline, as shown in FIG. 6, or can be communicated with the soundproof sealed cavity 151 through a branch of the vacuum pipeline, as shown in FIG. 7, and the present application does not limit this. Figure 3 Figure 2 Illustratively, the vacuum release valve 155 can be communicated with the soundproof sealed cavity 151 through a pipeline, as shown in FIG. 6, or can be communicated with the soundproof sealed cavity 151 through a branch of the vacuum pipeline, as shown in FIG. 7, and the present application does not limit this.

[0078] Further, the vacuum release valve 155 is communicated with the soundproof sealed cavity 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 release valve 155 and the soundproof sealed cavity 151. The reading of the vacuum gauge 152 can display the progress of vacuumization, the vacuum state and the progress of vacuum release state in the soundproof sealed cavity 151 in real time. In this way, the state in the soundproof sealed cavity 151 can be accurately and accurately reflected. And by sharing the vacuum pipeline, the production cost of the detection device 10 can be saved.

[0079] ​In one embodiment, the compressor 120 is connected to the cooler 20 through a high-pressure charging pipeline, and a high-pressure charging valve 121 is arranged on the high-pressure charging pipeline and located outside the first tank 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 in the open state at the same time, the compressor 120 can charge the compressed gas into the cooler 20; when the high-pressure charging valve 121 is in the closed state, no matter the compressor 120 is in the open state or in the closed state, the compressed gas cannot be charged into the cooler 20. In this way, by controlling the state of the high-pressure charging valve 121, it can be prevented that when the cooler 20 maintains the preset pressure value, the compressor 120 continues to charge the compressed gas into the cooler 20, thereby preventing the cooler 20 from being deformed or broken due to too much compressed gas being charged.

[0080] Further, the detection device 10 further comprises a high-pressure exhaust valve 122, which is communicated with the inside of the cooler 20 through a high-pressure exhaust pipeline and is used for exhausting the compressed gas in the cooler 20. In this way, the compressed gas in the cooler 20 can be released in time.

[0081] Illustratively, the high-pressure exhaust valve 122 can be directly communicated with the inside of the cooler 20 through the 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 communicated with the inside of the cooler 20 through the high-pressure exhaust pipeline and the high-pressure charging pipeline, and the application does not limit this.

[0082] Further, the high-pressure exhaust pipeline is used as a branch of the high-pressure charging pipeline, so that the high-pressure exhaust valve 122 is communicated with the inside of the cooler 20 through the high-pressure exhaust pipeline and the high-pressure charging pipeline. In this way, by sharing part of the high-pressure charging pipeline, the length of the high-pressure exhaust pipeline can be saved, thereby saving the production cost of the detection device 10. Moreover, by using the high-pressure exhaust pipeline as a branch of the high-pressure charging pipeline, the high-pressure charging pipeline only needs to be connected with the cooler 20, and the high-pressure exhaust pipeline does not need to be connected with the cooler 20, thereby simplifying the use process of the detection device 10 and improving the detection efficiency.

[0083] Further, a first pressure sensor 123 is arranged on the high-pressure exhaust pipeline, and the first pressure sensor 123 is used for detecting the actual pressure value in the cooler 20 and is in communication connection with the controller 140. In this way, the actual pressure value in the cooler 20 can be obtained through the first pressure sensor 123, and when the actual pressure value reaches the preset pressure value, the charging of the compressed gas into the cooler 20 can be stopped, so as to prevent too much compressed gas from being charged into the cooler 20, thereby avoiding the cooler 20 from being broken.

[0084] Further, the high-pressure exhaust pipeline is a branch of the high-pressure charging pipeline, and the first pressure sensor 123 is arranged on the branch, so that the compressor 120 can ensure that compressed air is charged into the cooler 20, thereby ensuring the accuracy of detection.

[0085] In one embodiment, referring to Figure 4 , the detection device 10 further comprises a third box body 170 and a low-pressure gas source 180; the third box body 170 is internally provided with a contrast cavity 171, and the contrast cavity 171 is not communicated with the test cavity 111; the low-pressure gas source 180 is communicated with the contrast cavity 171 and the test cavity 111 through a low-pressure charging pipeline; the differential pressure leak detector 160 has at least two test ends, one of the test ends of the differential pressure leak detector 160 extends into the test cavity 111, and the other test end extends into the contrast cavity 171; the differential pressure leak detector 160 is used for detecting the pressure change between the test cavity 111 and the contrast cavity 171. The cooler 20 is filled with high-pressure gas, the test cavity 111 and the contrast cavity 171 are filled with low-pressure gas, and 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 cavity 111 filled with low-pressure gas, so that the pressure in the test cavity 111 changes. And the high-pressure gas escaping into the test cavity 111 filled with low-pressure gas can make the pressure change in the test cavity 111 more obvious, so that the differential pressure leak detector 160 can more easily detect the pressure change between the test cavity 111 and the contrast cavity 171. Therefore, the accuracy of the sealing detection of the cooler 20 is improved.

[0086] In one embodiment, the low-pressure charging pipeline has at least two low-pressure charging branches, one of which is communicated with the contrast cavity 171, and the other of which is communicated with the test cavity 111; the low-pressure charging pipeline is further provided with a low-pressure charging valve 181, and the low-pressure charging valve 181 is arranged on the low-pressure charging pipeline between the low-pressure gas source 180 and the low-pressure charging branch. It can be understood that the low-pressure charging 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 charging valve 181 and the low-pressure gas source 180 are in the open state at the same time, the low-pressure gas source 180 can fill the test cavity 111 and the contrast cavity 171 with compressed gas; when the low-pressure charging valve 181 is in the closed state, whether the low-pressure gas source 180 is in the open state or in the closed state, the test cavity 111 and the contrast cavity 171 cannot be filled with compressed gas. In this way, the pressure change in the test cavity 111 and the contrast cavity 171 can be controlled by controlling the state of the low-pressure charging valve 181.

[0087] In one embodiment, the detection device 10 further comprises a first low-pressure exhaust valve 182 ， The first low-pressure exhaust valve 182 is communicated with the test cavity 111 through a first low-pressure exhaust pipeline. In this way, the compressed gas in the test cavity 111 can be released in time.

[0088] Illustratively, the first low-pressure exhaust valve 182 can be directly communicated with the inside 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 charging branch, so that the first low-pressure exhaust valve 182 is communicated with the inside of the test chamber 111 through the first low-pressure exhaust pipeline and the low-pressure charging branch. The present application does not limit this.

[0089] Further, the first low-pressure exhaust pipeline is used as a branch of the low-pressure charging branch, so that the first low-pressure exhaust valve 182 is communicated with the inside of the test chamber 111 through the first low-pressure exhaust pipeline and the low-pressure charging branch. In this way, by sharing part of the low-pressure charging branch, the length of the first low-pressure exhaust pipeline can be saved, and the production cost of the detection device 10 can be saved.

[0090] Further, the detection device 10 further comprises a second pressure sensor 183, which is arranged on the first low-pressure exhaust pipeline and is used to detect the pressure inside the test chamber 111. The second pressure sensor 183 is in communication connection with 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 is helpful to determine whether the differential pressure leak detector 160 is working normally.

[0091] In one embodiment, the detection device 10 further comprises a second low-pressure exhaust valve 184 ， The second low-pressure exhaust valve 184 is communicated with 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 communicated with 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 charging branch, so that the second low-pressure exhaust valve 184 is communicated with the inside of the comparison chamber 171 through the second low-pressure exhaust pipeline and the low-pressure charging branch. The present application does not limit this.

[0092] Further, the second low-pressure exhaust pipeline is used as a branch of the low-pressure charging branch, so that the second low-pressure exhaust valve 184 is communicated with the inside of the comparison chamber 171 through the second low-pressure exhaust pipeline and the low-pressure charging branch. In this way, by sharing part of the low-pressure charging branch, the length of the second low-pressure exhaust pipeline can be saved, and the production cost of the detection device 10 can be saved.

[0093] Further, the detection device 10 further comprises a third pressure sensor 185, which is arranged on the second low-pressure exhaust pipeline and is used to detect the pressure inside the comparison chamber 171. The third pressure sensor 185 is in communication connection with 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 is helpful to determine whether the differential pressure leak detector 160 is working normally.

[0094] To sum up, the detection device 10 provided by the application can detect the false welding defects in the cooler 20 and detect the sealing performance of the cooler 20, so that the function of the detection device 10 is increased, one machine has multiple functions, the cost of purchasing the detection device is saved, and the applicability of the detection device is improved. In addition, the detection device 10 provided by the application can also detect the false welding defects and the sealing performance of the cooler 20 at the same time, so that the detection efficiency is improved, and the production cost and the detection cost are saved.

[0095] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as within the scope of the present disclosure.

[0096] The above-described embodiments only express several implementation manners of the application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the application, and these all belong to the protection scope of the application. Therefore, the patent protection scope of the application should be subject to the appended claims.

Claims

1. A detection device for a chiller, characterized by, The detection device comprises: a first box (110) internally provided with a test cavity (111) for accommodating a cooler (20); a compressor (120) for communicating with the inside of the cooler (20) and filling compressed gas into the inside of the cooler (20); a sound sensor (130) arranged in the test cavity (111) for collecting sound generated by the cooler (20) filled with compressed gas and obtaining a detected sound; a controller (140) in communication connection with the sound sensor (130) for judging whether the cooler (20) has a virtual welding defect according to the detected sound; a differential pressure leak detector (160) having at least one test end, one of the test ends of the differential pressure leak detector (160) extending into the test cavity (111), and the differential pressure leak detector (160) being used for detecting pressure change in the test cavity (111).

2. The detection device of a chiller according to claim 1, characterized in that, The detection device further comprises a second box (150), the first box (110) is arranged inside the second box (150), and a soundproof sealed cavity (151) is formed between the first box (110) and the second box (150), and the soundproof sealed cavity (151) is not communicated with the test cavity (111).

3. The detection device of a chiller according to claim 2, characterized in that, The detection device further comprises a vacuum assembly for vacuumizing the soundproof sealed cavity (151); The vacuum assembly comprises a vacuum gauge (152) and a vacuum pump (153), the vacuum pump (153) communicates with the soundproof sealed cavity (151) for vacuumizing the soundproof sealed cavity (151), and the vacuum gauge (152) is used for detecting vacuum degree of the soundproof sealed cavity (151); Or, the first box (110) is externally provided with soundproof material.

4. The detection device of a chiller according to claim 3, characterized in that, The vacuum assembly further comprises a vacuum valve (154), the vacuum pump (153) communicates with the soundproof sealed cavity (151) through a pipeline, and the vacuum valve (154) is arranged on the pipeline between the vacuum pump (153) and the soundproof sealed cavity (151).

5. The detection device of a chiller according to claim 4, wherein The vacuum assembly further comprises a vacuum release valve (155) in communication with the soundproof sealed cavity (151) for releasing vacuum state of the soundproof sealed cavity (151).

6. The detection device of a chiller according to claim 1, wherein The compressor (120) is connected with the cooler (20) through a high-pressure charging pipeline; The high-pressure charging pipeline is provided with a high-pressure charging valve (121), and the high-pressure charging valve (121) is located outside the first box (110).

7. The detection device of a chiller according to claim 6, characterized in that The detection device further comprises a high-pressure exhaust valve (122) in communication with the inside of the cooler (20) through a high-pressure exhaust pipeline for exhausting compressed gas in the inside of the cooler (20); The high-pressure exhaust pipeline is further provided with a first pressure sensor (123) for detecting the actual pressure value inside the cooler (20), and the first pressure sensor (123) is in communication connection with the controller (140).

8. The detection device of a chiller according to any one of claims 1 to 7, characterized in that, The detection device further comprises a third box (170) and a low-pressure gas source (180). The third box (170) is internally provided with a contrast cavity (171) which is not communicated with the test cavity (111); the low-pressure gas source (180) simultaneously communicates the contrast cavity (171) and the test cavity (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 cavity (111), and the other extends into the contrast cavity (171); the differential pressure leak detector (160) is used for detecting the pressure change in the test cavity (111) and the contrast cavity (171).

9. The detection device of a chiller according to claim 8, characterized in that, The low-pressure gas charging pipeline has at least two low-pressure gas charging branches, one of which communicates with the contrast cavity (171), and the other communicates with the test cavity (111). The low-pressure gas charging pipeline is further provided with a low-pressure gas charging valve (181) which is arranged on the low-pressure gas charging pipeline between the low-pressure gas source (180) and the low-pressure gas charging branch.

10. The detection device of a chiller according to claim 9, wherein The detection device further comprises a first low-pressure exhaust valve (182), a second low-pressure exhaust valve (184), a second pressure sensor (183) and a third pressure sensor (185); the first low-pressure exhaust valve (182) is communicated with the test cavity (111) through a first low-pressure exhaust pipeline, and the second low-pressure exhaust valve (184) is communicated with the contrast cavity (171) through a second low-pressure exhaust pipeline; The second pressure sensor (183) is arranged on the first low-pressure exhaust pipeline for detecting the pressure inside the test cavity (111), and the second pressure sensor (183) is in communication connection with the controller (140); The third pressure sensor (185) is arranged on the second low-pressure exhaust pipeline for detecting the pressure inside the contrast cavity (171), and the third pressure sensor (185) is in communication connection with the controller (140).

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