Evaporative condenser air tightness detection equipment and use method
By designing an evaporative condenser airtightness detection device, using water immersion and gas delivery methods, the problem of difficulty in detecting the sealing of the condenser in the prior art is solved, and efficient and accurate airtightness detection and leakage point positioning are achieved.
Patent Information
- Application Number
- CN202510606810.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-12
- Publication Date
- 2025-07-18
AI Technical Summary
The prior art is difficult to efficiently and accurately detect the airtightness of evaporative condensers, especially the sealing properties of concealed parts such as welds, interfaces and elbows, resulting in the possible problems of fluid leakage and poor refrigeration efficiency.
Design an evaporative condenser airtightness detection device. By soaking the condenser pipeline in water, using a gas conveying device to flush gas into the pipeline, observe whether there are bubbles on the surface of the pipeline, and realize sealing detection of welds, interfaces, elbows and other parts.
It realizes efficient and accurate airtight detection of evaporative condensers, can detect leakage points, avoid missed inspection by traditional smear methods, and ensures the comprehensiveness and reliability of the detection.
Smart Images
Figure CN120333712A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of airtightness detection equipment for condensers, and particularly to an airtightness detection equipment for an evaporative condenser and a usage method thereof. Background Technique
[0002] An evaporative condenser is a device that uses the heat absorbed by the partial evaporation of the spray water outside the coil to cool the high-temperature gaseous refrigerant inside the coil, gradually cooling the refrigerant inside the tube from gaseous to liquid. It is commonly used for cooling in cold storages and is composed of components such as a fan, a condensing coil, heat exchange fins, and a box body.
[0003] After the evaporative condenser is produced, its performance needs to be detected. Among them, the airtightness detection is one of the performance detections of the condensing coil pipeline. Detecting the airtightness of the condensing coil pipeline is very important. A condensing coil pipeline with poor airtightness will cause fluid leakage, poor refrigeration efficiency, and even pose a safety hazard.
[0004] Therefore, in view of the above problems, an airtightness detection equipment for an evaporative condenser and a usage method are designed. By setting the condenser pipeline on the airtightness detection device, then immersing the condenser in water, and then injecting gas into the condensing pipe, it is judged whether the condensing pipe leaks by observing whether there are bubbles on the surface of the condensing pipe. Summary of the Invention
[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an airtightness detection equipment for an evaporative condenser and a usage method that can efficiently and accurately complete the airtightness detection, and solve the problems raised in the background technique.
[0006] To achieve the above purpose, the present invention provides the following technical solution: An airtightness detection equipment for an evaporative condenser, including: a box body, in which water for airtightness detection is filled; a baffle, which is arranged on the box body in a C shape, and an airtightness detection device is arranged inside the baffle. Lifting frames are arranged at the four corners of the upper surface of the airtightness detection device in a rectangular shape, a glass sealing box is arranged on the lifting frames, a sealing groove is correspondingly arranged at the bottom of the glass sealing box, a fixing member is further arranged on the upper surface of the airtightness detection device, and a gas delivery device arranged at the bottom of the airtightness detection device is connected to the lower end of the fixing member; a top cover, which is arranged on the top of the baffle, an installation groove is arranged at the bottom of the top cover, and limiting blocks are symmetrically arranged in the installation groove; a display screen, a control board and a warning light near the side of the display screen are further arranged on the outside of the top cover.
[0007] Preferably, first support columns are arranged at the four corners of the inner bottom of the box body near the inner wall in a rectangular shape, and the first support columns pass through the airtightness detection device and are arranged in the box body and the baffle.
[0008] Preferably, a sealing frame is further provided on the front surface of the box body, and an observation window is arranged in the sealing frame; second support columns are arranged at the four corners of the inner walls of the side surfaces of the box body and the baffle in a rectangular shape, and bevel gear assemblies are arranged on the second support columns; a driving motor is arranged between the two bevel gear assemblies on the inner walls of one side of the box body and the baffle; limit columns are arranged at the four corners of the center of the inner bottom of the box body, and the tops of the limit columns correspond to the airtightness detection device.
[0009] Preferably, sliders corresponding to the second support columns are arranged on both sides of the airtightness detection device, a lead screw is arranged in the middle of the slider, the upper end of the lead screw is connected with the bevel gear assembly, the bevel gear assembly is driven by the driving motor, and the lead screw is arranged in the middle of the second support column.
[0010] Preferably, a sealing port is arranged in the middle of the upper surface of the glass sealing box, and the sealing port includes a sleeve arranged on the glass sealing box and a plug arranged on the sleeve.
[0011] Preferably, the fixing member includes a mounting plate passing through the airtightness detection device and connected to the gas delivery device, and a fixing seat arranged on the mounting plate for fixing the device under test.
[0012] Preferably, the gas delivery device includes a mounting seat arranged at the top for fixedly mounting the mounting plate and a micro vacuum pump arranged at the bottom. An air delivery pipe and an air extraction pipe are respectively arranged on the outer side of the micro vacuum pump in the gas delivery device, and a plurality of air delivery pipes are arranged to adapt to the airtightness detection of a multi-channel condenser.
[0013] Preferably, a connecting member is connected to the air delivery pipe, and the connecting member is arranged on the upper surface of the airtightness detection device.
[0014] Preferably, the connecting member includes a gooseneck pipe and a connecting pipe. A lower connecting sleeve for connecting the bottom of the connecting pipe to the gooseneck pipe, an upper connecting sleeve for sealingly connecting the top of the connecting pipe to the pipeline of the device under test, a filter sleeve head is further arranged in the upper connecting sleeve, and a one-way valve body is arranged in the middle of the inside of the connecting pipe.
[0015] An installation method of an airtightness detection device for an evaporative condenser, which is realized by using the airtightness detection device for an evaporative condenser, includes the following steps: In the first step, the box body is filled with water for detecting the airtightness of the evaporative condenser, the condenser pipeline is arranged on the airtightness detection device, fixed by the fixing member arranged on the airtightness detection device, and sealed and connected to the condenser pipeline through the connecting members on both sides. Second step: Through the second struts arranged on both sides of the airtightness detection device, the airtightness detection device is lowered to the bottom of the box body through the bevel gear assembly arranged on the second struts. The driving motor drives the airtightness detection device to descend through the bevel gear assembly, and the descending height is limited by the limit posts, so as to immerse the condenser pipeline in water. It needs to be completely immersed and left standing for 3 - 5 minutes to avoid the disturbance of water flow covering the bubbles. Third step: After the condenser pipeline is completely immersed in water, the lifting frame on the airtightness detection device is lowered through the control board arranged on the upper side of the top cover, so that the glass sealed box is hermetically arranged in the sealing groove. Then, the driving motor drives the airtightness detection device to rise through the bevel gear assembly, so that the airtightness detection device rises to a suitable height for observation and is parallel to the top of the box body. Fourth step: Then, the gas delivery device at the lower end of the airtightness detection device is started through the control board on the side of the top cover, and gas is flushed into the condensation pipeline. The miniature vacuum pump at the lower end of the gas delivery device conveys the airtightness detection gas to the glass sealed box hermetically arranged on the airtightness detection device through the air delivery pipe. During the process of the air delivery pipe conveying the airtightness detection gas, the conveyed gas flows inside the condenser pipeline. Fifth step: Finally, by observing whether there are bubbles on the surface of the condensation pipeline completely immersed in water, it is judged whether the condensation pipeline leaks air, so as to realize that the operation of this evaporative condenser airtightness detection equipment is simple, and the airtightness detection is completed efficiently and accurately, and the leakage point is located to judge the airtightness of the condenser.
[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The condenser pipeline is arranged on the airtightness detection device, fixed by the fixing piece, and the two ends of the condenser pipeline are sealed by the connecting piece, so as to avoid affecting its accuracy during the airtightness detection of the condenser pipeline. The driving motor drives the bevel gear assemblies on both sides, so that the airtightness detection device sliding on the side of the second strut descends, and the condenser pipeline is immersed in the water in the box body, immersed and left standing for 3 - 5 minutes to avoid the disturbance of water flow covering the bubbles. Then, the driving motor drives the airtightness detection device to rise into the baffle. At the same time, the gas delivery device at the lower end of the airtightness detection device is started through the control board on the top cover, so that the miniature vacuum pump is connected to the connecting piece through the air delivery pipe, and gas is flushed into the condensation pipeline. By observing whether there are bubbles on the surface of the condensation pipe, it is judged whether the condensation pipeline leaks air. The present invention conducts the airtightness detection by immersing the condenser in a water-filled water tank and flushing gas into the condenser pipe, realizing that water completely wraps the device to be tested, enabling it to detect hidden parts such as welds, interfaces, elbows, etc. that are difficult to reach, and avoiding the missed detection of the airtightness detection of the device caused by uneven coverage in the traditional smearing method, so as to achieve the purpose of efficiently and accurately completing the airtightness detection of it. Description of the Drawings
[0017] Figure 1 It is a schematic diagram of the overall structure of the air tightness detection equipment for an evaporative condenser of the present invention; Figure 2 It is a schematic diagram of the structure of the air tightness detection equipment of the present invention; Figure 3 It is a schematic diagram of the water tank structure of the air tightness detection equipment of the present invention; Figure 4 It is a schematic diagram of the overall vertical section structure of the present invention; Figure 5 It is a schematic diagram of the structure of the airtightness detection device of the present invention; Figure 6 It is a schematic diagram of the top cover structure of the present invention; Figure 7 It is a schematic diagram of the overall structure of the airtightness detection equipment of the present invention; Figure 8 It is a schematic diagram of the overall structure of the airtightness detection equipment of the present invention; Figure 9 It is a schematic diagram of the structure of the airtightness detection connection sealing tube of the present invention.
[0018] Explanations in the figure: 1. Box body; 2. Baffle; 3. Top cover; 4. Display screen; 5. Control panel; 6. Air tightness detection device; 7. Observation window; 8. First pillar; 9. Connector; 10. Second pillar; 11. Bevel gear assembly; 12. Drive motor; 13. Lifting frame; 14. Sealing port; 15. Glass sealing box; 16. Fixing part; 17. Sealing groove; 18. Gas delivery device; 19. Limiting column; 20. Sealing frame; 21. Mounting seat; 22. Gas delivery pipe; 23. Miniature vacuum pump; 24. Exhaust pipe; 25. Limiting block; 26. Warning light; 27. Mounting groove; 28. Slider; 29. Gooseneck; 30. Connecting pipe; 31. Fixing seat; 32. Mounting plate; 33. Sleeve; 34. Plug; 35. Upper connecting sleeve; 36. Filter sleeve head; 37. One-way valve body; 38. Lower connecting sleeve. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Example
[0020] like Figures 1-4As shown in the figure, this embodiment discloses an airtightness detection device and a usage method for an evaporative condenser, including: a box body 1, in which filtered water or deionized water for airtightness detection is installed; a baffle 2, which is arranged on the box body 1 in a C shape, and second supports 10 are arranged at the four corners of the inner side walls of the box body 1 and the baffle 2 in a rectangular shape. Bevel gear assemblies 11 are arranged on the second supports 10, and a drive motor 12 is arranged between the two bevel gear assemblies 11 on the inner walls on one side of the box body 1 and the baffle 2; at the middle parts of the second supports 10 at the four corners in a rectangular shape, an airtightness detection device 6 is slidably arranged. Lifting frames 13 are arranged at the four corners of the upper surface of the airtightness detection device 6. A glass sealing box 15 is arranged on the lifting frames 13. A sealing groove 17 is correspondingly arranged at the bottom of the glass sealing box 15. A fixing member 16 is also arranged on the upper surface of the airtightness detection device 6. The lower end of the fixing member 16 is connected to a gas delivery device 18 arranged at the bottom of the airtightness detection device 6; a top cover 3, which is arranged on the top of the baffle 2. An installation groove 27 is arranged at the bottom of the top cover 3. Limit blocks 25 are symmetrically arranged on both sides of the installation groove 27. Grooves for embedding the bevel gear assemblies 11 and the drive motor 12 are also arranged on both sides of the installation groove 27; the top cover 3 is also provided with a display screen 4, a control board 5, and a warning light 26 close to the side of the display screen 4.
[0021] In this embodiment, a drain port and a water inlet are respectively arranged on the outer wall of the box body 1. Limit posts 19 are arranged in the box body 1 to limit the airtightness detection device 6 when it descends to the bottom of the box body 1, preventing the gas delivery device 18 at the lower end of the airtightness detection device 6 from contacting the inner wall of the box body 1. And by arranging a sealing frame 20 on the front surface of the box body 1 and an observation window 7 in the sealing frame 20, it is convenient to observe the water level in the box body 1 and whether the condenser pipeline on the airtightness detection device 6 is completely immersed in water. And by the descent of the lifting frame 13 arranged on the airtightness detection device 6, the completely immersed device under test is sealed, so that the water is not easy to flow away on the airtightness detection device 6. Then, by starting the drive motor 12 to drive the bevel gear assemblies 11 at both ends to drive the airtightness detection device 6 slidably arranged in the middle of the second supports 10 to rise, the completely immersed device under test is lifted into the baffle 2, which is convenient for observation and subsequent airtightness detection completed by the gas delivery device 18. Embodiment
[0022] As Figures 1-9As shown in the figure, this embodiment discloses an airtightness detection device and a usage method for an evaporative condenser, including: a box body 1, in which filtered water or deionized water for airtightness detection is installed; a baffle 2, which is arranged on the box body 1 in a C shape, and second supports 10 are arranged at the four corners of the inner side walls of the box body 1 and the baffle 2 in a rectangular shape, and bevel gear assemblies 11 are arranged on each of the second supports 10. A driving motor 12 is arranged between the two bevel gear assemblies 11 on the inner walls of one side of the box body 1 and the baffle 2; a hermeticity detection device 6 is slidably arranged in the middle of the second supports 10 at the four corners of the rectangle. Lifting frames 13 are arranged at the four corners of the upper surface of the hermeticity detection device 6, a glass sealing box 15 is arranged on the lifting frames 13, a sealing groove 17 is correspondingly arranged at the bottom of the glass sealing box 15, and a fixing member 16 is also arranged on the upper surface of the hermeticity detection device 6. The lower end of the fixing member 16 is connected to a gas delivery device 18 arranged at the bottom of the hermeticity detection device 6; a top cover 3 is arranged on the top of the baffle 2. An installation groove 27 is arranged at the bottom of the top cover 3, limiting blocks 25 are symmetrically arranged on both sides of the installation groove 27, and grooves for embedding the bevel gear assemblies 11 and the driving motor 12 are also arranged on both sides of the installation groove 27; the top cover 3 is also provided with a display screen 4, a control board 5, and a warning light 26 close to the side of the display screen 4.
[0023] In this embodiment, the same gas delivery pipes 22 and connectors 9 are arranged on both the gas delivery device 18 and the hermeticity detection device 6, so as to ensure that each condenser pipe can be hermetically connected. The top cover 3 is fixedly arranged on the baffle 2. The second supports 10, the bevel gear assemblies 11, and the driving motor 12 constitute a lifting structure for the hermeticity detection device 6 inside the box body 1 and the baffle 2. The lifting structure is embedded in the installation groove 27 and is controlled by the control board 5 arranged on the top cover 3 to complete the airtightness detection of the evaporative condenser.
[0024] In this embodiment, first supports 8 are arranged at the four corners of the inner bottom of the box body 1 close to the inner wall. The first supports 8 pass through the hermeticity detection device 6 and are arranged inside the box body 1 and the baffle 2; limit posts 19 are arranged at the four corners of the center of the inner bottom of the box body 1. The top of the limit posts 19 corresponds to the hermeticity detection device 6 to limit the hermeticity detection device 6. A sealing port 14 is arranged in the middle of the upper surface of the glass sealing box 15. The sealing port 14 includes a sleeve 33 arranged on the glass sealing box 15 and a plug 34 arranged on the sleeve 33, which is beneficial to filling water for airtightness detection into the glass sealing box 15 and discharging the gas in the glass sealing box 15 when needed.
[0025] In this embodiment, the fixing member 16 includes a mounting disc 32 passing through the airtightness detection device 6 and connected to the gas delivery device 18, and a fixing seat 31 provided on the mounting disc 32 for fixing the device under test. The gas delivery device 18 includes a mounting seat 21 provided at the top for fixedly mounting the mounting disc 32 and a micro vacuum pump 23 provided at the bottom. The micro vacuum pump 23 is respectively provided with an air delivery pipe 22 and an air extraction pipe 24 on the outside of the gas delivery device 18. A connecting member 9 is connected to the air delivery pipe 22. The connecting member 9 is provided on the upper surface of the airtightness detection device 6. The connecting member 9 includes a gooseneck tube 29 and a connecting pipe 30. The bottom of the connecting pipe 30 is connected to the lower connecting sleeve 38 connected to the gooseneck tube 29. The top of the connecting pipe 30 is connected to the upper connecting sleeve 35 for sealing connection with the pipeline of the device under test. A filter sleeve head 36 is further provided inside the upper connecting sleeve 35, and a one-way valve body 37 is provided in the middle of the inside of the connecting pipe 30, so as to control the gas injection into the pipeline of the device under test by the connecting member 9 through the one-way valve body 37.
[0026] An installation method of an airtightness detection device for an evaporative condenser includes the following steps: First step, fill the box body 1 with water for detecting the airtightness of the evaporative condenser. Then, arrange the condenser pipeline on the airtightness detection device 6, fix it through the fixing member 16 provided on the airtightness detection device 6, and seal-connect it to the condenser pipeline through the connecting members 9 on both sides. Second step, through the second support columns 10 provided on both sides of the airtightness detection device 6, make it pass through the bevel gear assembly 11 provided on the second support columns 10, and let the driving motor 12 drive the airtightness detection device 6 to descend to the bottom of the box body 1 through the bevel gear assembly 11, and limit the descending height through the limit column 19, so as to immerse the condenser pipeline in the water. It needs to be completely immersed and left standing for 3 - 5 minutes to avoid the disturbance of the water flow covering the bubbles. Third step, after the condenser pipeline is completely immersed in the water, control the lifting frame 13 on the airtightness detection device 6 to descend through the control board 5 provided on the upper side of the top cover 3, so that the glass sealing box 15 is hermetically arranged in the sealing groove 17. Then, drive the airtightness detection device 6 to rise through the driving motor 12 through the bevel gear assembly 11, so that the airtightness detection device 6 rises to a suitable height for observation, specifically parallel to the top of the box body 1. Fourth step, then, start the gas delivery device 18 at the lower end of the airtightness detection device 6 through the control board 5 on the side of the top cover 3 to inject gas into the condensation pipeline. The micro vacuum pump 23 at the lower end of the gas delivery device 18 conveys the airtightness detection gas to the glass sealing box 15 hermetically arranged on the airtightness detection device 6 through the air delivery pipe 22. During the process of the air delivery pipe 22 conveying the airtightness detection gas, the conveyed gas flows inside the condenser pipeline. Step 5. Finally, by observing whether there are bubbles on the surface of the condensation pipeline completely immersed in water, it is judged whether the condensation pipeline leaks air, so as to realize the simple operation of the airtightness detection equipment of the evaporative condenser, and complete the airtightness detection efficiently and accurately, locate the leakage point, and judge the sealing performance of the condenser.
[0027] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.
[0028] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. An airtightness detection device for an evaporative condenser, characterized in that, Comprising: A box body (1), inside which there is water for airtightness detection; A baffle (2), which is arranged in a C shape on the box body (1). Inside the baffle (2), there is an airtightness detection device (6). At the four corners of the upper surface of the airtightness detection device (6) in a rectangular shape, there are lifting frames (13). On the lifting frames (13), there is a glass sealing box (15). Correspondingly, there is a sealing groove (17) at the bottom of the glass sealing box (15); On the upper surface of the airtightness detection device (6), there is a fixing part (16). At the bottom of the fixing part (16), there is a gas delivery device (18); A top cover (3), which is arranged on the top of the baffle (2). At the bottom of the top cover (3), there is an installation groove (27). Inside the installation groove (27), there are also symmetrically arranged limiting blocks (25); On the outside of the top cover (3), there are also a display screen (4), a control board (5), and a warning light (26) close to the side of the display screen (4).
2. The airtightness detection device for an evaporative condenser according to claim 1, wherein: At the four corners of the inner bottom of the box body (1) near the inner wall in a rectangular shape, there are first support columns (8), and the first support columns (8) pass through the airtightness detection device (6) and are arranged inside the box body (1) and the baffle (2).
3. The airtightness detection device for an evaporative condenser according to claim 1, wherein: On the front surface of the box body (1), there is also a sealing frame (20), and inside the sealing frame (20), there is an observation window (7); At the four corners of the side inner walls of the box body (1) and the baffle (2) in a rectangular shape, there are second support columns (10). On the second support columns (10), there are bevel gear assemblies (11). Between the two bevel gear assemblies (11) on one side of the inner walls of the box body (1) and the baffle (2), there is a driving motor (12); At the four corners of the center of the inner bottom of the box body (1) in a rectangular shape, there are limiting columns (19), and the tops of the limiting columns (19) correspond to the airtightness detection device (6).
4. The airtightness detection device for an evaporative condenser according to claim 1, wherein: On the outside of the airtightness detection device (6), there are also symmetrically arranged sliders (28). In the middle of the sliders (28), there is a lead screw. The upper end of the lead screw is connected to the bevel gear assembly (11), and the bevel gear assembly (11) is driven by the driving motor (12).
5. The airtightness detection device for an evaporative condenser according to claim 1, wherein: In the middle of the upper surface of the glass sealing box (15), there is a sealing port (14). The sealing port (14) includes a sleeve (33) arranged on the glass sealing box (15) and a plug (34) arranged on the sleeve (33).
6. The airtightness detection device for an evaporative condenser according to claim 1, wherein: The fixing part (16) includes a fixing seat (31) and an installation disc (32). The fixing seat (31) fixes the device to be measured, and the installation disc (32) is fixedly connected to the gas delivery device (18).
7. The airtightness detection device for an evaporative condenser according to claim 1, characterized in that: The gas delivery device (18) includes an installation seat (21) and a micro vacuum pump (23). On the outside of the gas delivery device (18), the micro vacuum pump (23) is respectively connected with a gas delivery pipe (22) and an extraction pipe (24).
8. The airtightness detection device for an evaporative condenser according to claim 7, characterized in that: The gas delivery pipe (22) is connected with a connecting part (9), and the connecting part (9) is arranged on the upper surface of the airtightness detection device (6).
9. The airtightness detection device for an evaporative condenser according to claim 8, characterized in that: The connecting piece (9) includes a gooseneck tube (29) and a connecting tube (30). The bottom of the connecting tube (30) is connected to a lower connecting sleeve (38) that is connected to the gooseneck tube (29). The top of the connecting tube (30) is connected to an upper connecting sleeve (35) that is hermetically connected to the pipeline of the device under test. A filter sleeve head (36) is also provided inside the upper connecting sleeve (35). A one-way valve body (37) is provided in the middle of the interior of the connecting tube (30).
10. A method for using an airtightness detection device for an evaporative condenser, which is implemented by using the airtightness detection device for an evaporative condenser according to any one of claims 1-9, characterized in that, It includes the following steps: In the first step, the box body (1) is filled with water for airtightness detection of the evaporative condenser. Then, the condenser pipeline is arranged on the airtightness detection device (6) and fixed by a fixing member (16) provided on the airtightness detection device (6). The two-sided connecting pieces (9) are hermetically connected to the condenser pipeline correspondingly; In the second step, through the second struts (10) provided on both sides of the airtightness detection device (6), the airtightness detection device (6) is lowered to the bottom of the box body (1) through a bevel gear assembly (11) provided on the second struts (10), and the driving motor (12) drives the airtightness detection device (6) through the bevel gear assembly (11). The lowering height is limited by a limit post (19), so that the condenser pipeline is immersed in water, and it needs to be completely immersed and left standing for 3 - 5 minutes to avoid water flow disturbance covering up bubbles; In the third step, after the condenser pipeline is completely immersed in water, the lifting frame (13) on the airtightness detection device (6) is lowered by controlling the control board (5) on the upper side of the top cover (3), so that the glass sealing box (15) is hermetically arranged in the sealing groove (17). Then, the airtightness detection device (6) is lifted by the driving motor (12) through the bevel gear assembly (11) to a height suitable for observation, which is parallel to the top of the box body (1); In the fourth step, then, the gas delivery device (18) at the lower end of the airtightness detection device (6) is started by controlling the control board (5) on the side of the top cover (3), and gas is introduced into the condensation pipeline. The miniature vacuum pump (23) at the lower end of the gas delivery device (18) conveys airtightness detection gas to the glass sealing box (15) hermetically arranged on the airtightness detection device (6) through an air delivery pipe (22). During the process of the air delivery pipe (22) conveying the airtightness detection gas, the conveyed gas flows inside the condenser pipeline; In the fifth step, finally, by observing whether there are bubbles on the surface of the condensation pipeline completely immersed in water, it is judged whether the condensation pipeline leaks, so as to realize that the operation of this evaporative condenser airtightness detection device is simple, and the airtightness detection is completed efficiently and accurately, and the leakage point is located to judge the sealing performance of the condenser.