Missing detection device in automobile evaporator core body

Abstract

The utility model discloses a leak detection device in an automobile evaporator core body, and relates to the technical field of automobile cooling systems. The device comprises a detection platform and an ultrasonic detection system, and two detection stations are arranged on the detection platform and used for placing evaporator cores; each detection station is provided with a connecting block which is used for being connected with an interface of an evaporator core body. The ultrasonic detection system is connected with the two connecting blocks through a channel switching mechanism at the same time, and the ultrasonic detection system is only communicated with the evaporator core of one detection station through switching. In the detection process, ultrasonic waves are transmitted through the interior of the evaporator core and return to the detection system, and therefore inner leakage detection is achieved. The device adopts a double-station design and an automatic channel switching mechanism, so that the detection efficiency and accuracy are remarkably improved, the manual intervention is reduced, and the device has the characteristics of low cost, non-contact property and non-destructive property. The method is suitable for batch detection of evaporators of different specifications, and can be widely applied to evaporator inner leakage detection of an automobile air-conditioning system.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile cooling systems and relates to a device for detecting internal leakage in an automobile evaporator core body. Background Art

[0002] As a key component of the air conditioning system, the main function of the evaporator is to absorb heat through the evaporation of the refrigerant to achieve a refrigeration effect. However, with the increase of the service time or due to defects in the manufacturing process, leakage problems may occur inside the evaporator core body. Internal leakage of the evaporator will cause the loss of refrigerant, which will in turn affect the refrigeration efficiency of the air conditioning system and may even lead to the failure of the entire system.

[0003] Traditional detection methods include visual inspection, air pressure test, helium mass spectrometry leak detection, etc. Although these methods can detect the leakage of the evaporator to a certain extent, they have certain limitations. Visual inspection requires disassembling components, which is complex to operate and difficult to detect tiny internal leaks; the air pressure test can detect leakage, but it cannot accurately locate the leak point; the helium mass spectrometry leak detection has a high detection accuracy, but it is expensive and cumbersome to operate, and it is difficult to be widely used in routine detection.

[0004] In view of these deficiencies, ultrasonic detection technology has been gradually introduced into the internal leakage detection of evaporators in recent years. Ultrasonic detection is a non-destructive testing technology based on the propagation characteristics of sound waves in materials. It detects internal defects by propagating high-frequency sound waves inside the evaporator and using the reflection or scattering phenomenon of sound waves when encountering internal leakage, cracks and other defects to detect and locate the leakage points inside the evaporator. Compared with traditional methods, ultrasonic detection has the advantages of non-contact, high precision, high speed, low cost, etc., and can effectively improve the detection efficiency and accuracy of internal leakage of the evaporator. However, the existing ultrasonic detection equipment mainly adopts single-station detection and relies on manual operation, which not only seriously affects the detection efficiency, but also greatly reduces the detection accuracy due to the influence of human factors. Summary of the Utility Model

[0005] In view of this, the purpose of the utility model is to solve the problem of low efficiency and accuracy of existing internal leakage detection, and provide a device for detecting internal leakage in an automobile evaporator core body.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An internal leakage detection device for an automotive evaporator core body includes a detection platform and an ultrasonic detection system. There are two detection stations on the detection platform for placing the evaporator core body. A connecting block is provided on each detection station, and the connecting block is used to connect with the interface of the evaporator core body. The ultrasonic detection system is connected to the two connecting blocks simultaneously through a channel conversion mechanism, and through the switching of the channel conversion mechanism, the ultrasonic detection system is only connected to one of the evaporator core bodies at the two detection stations. The ultrasonic wave emitted is transmitted through the evaporator core body and then returns to the ultrasonic detection system, thereby detecting the internal leakage of the evaporator core body.

[0008] Further, the channel conversion mechanism includes a conversion block, a conversion valve core, and a driving cylinder. The conversion block is provided with a first outlet, a first inlet, a second outlet, a second inlet, an ultrasonic wave emission port, and an ultrasonic wave reception port. The conversion valve core is slidably disposed within the conversion block and is connected to the driving cylinder. One of the connecting blocks at the two detection stations is connected to the first outlet and the first inlet, and the other is connected to the second outlet and the second inlet. The ultrasonic wave emission port and the ultrasonic wave reception port are both connected to the ultrasonic detection system. Under the drive of the driving cylinder, the conversion valve core makes the first outlet and the first inlet conduct with the ultrasonic system simultaneously or makes the second outlet and the second inlet conduct with the ultrasonic system simultaneously.

[0009] The ultrasonic wave emitted by the ultrasonic detection system is transmitted to the evaporator core body through the conversion block and then returns to the ultrasonic detection system through the conversion block, thereby detecting the evaporator core body through ultrasonic waves.

[0010] Further, there are two conversion valve cores, which are connected to the same driving cylinder. The first outlet and the second outlet are arranged along the axial direction of one conversion valve core, and the first inlet and the second inlet are arranged along the axial direction of the other conversion valve core.

[0011] Further, the conversion valve core is provided with a through hole. One end of the through hole is connected to the ultrasonic wave emission port or the ultrasonic wave reception port, and the other end of the through hole slides between the first outlet and the second outlet or between the first inlet and the second inlet, thereby controlling the on-off of the channel inside the conversion valve core. The conversion valve core is slidably sealed with the conversion block through a sealing ring.

[0012] Further, a manipulator is provided on each detection station for clamping the evaporator core body for loading and unloading.

[0013] Further, the manipulator is arranged above the detection station and fixed to the top of the detection platform.

[0014] Further, a telescopic air cylinder and a pressing air cylinder are also provided on the detection station. The pressing air cylinder is arranged above the evaporator core body and is used to press and fix the evaporator core body. The telescopic air cylinder is connected to the connecting block and drives the connecting block to move to dock with or separate from the evaporator core body.

[0015] Further, the channel conversion mechanism is located between the two detection stations. The ultrasonic detection system is arranged in the detection platform and is located below the detection station.

[0016] Further, a sorting port is provided on one side of the detection station on the detection platform. An inclined sorting channel is provided below the sorting port. The manipulator puts the unqualified evaporator core bodies into the sorting port and into the sorting channel.

[0017] Further, moving rollers are provided below the detection platform.

[0018] The beneficial effects of the present utility model are as follows:

[0019] 1. The present utility model adopts a dual-station design. There are two detection stations on the detection platform, enabling two evaporator core bodies to be prepared for detection simultaneously. The ultrasonic detection system can switch between the two stations through the channel conversion mechanism, thereby realizing continuous detection operations. Compared with the traditional single-station detection, the dual-station design of the present utility model greatly improves the detection efficiency, reduces the waiting time, and meets the rapid detection requirements in large-scale production lines.

[0020] 2. The present utility model uses ultrasonic detection technology. By utilizing the reflection or scattering phenomena of sound waves when encountering defects such as leaks and cracks, it can accurately detect and locate the internal leakage points of the evaporator core body. Compared with traditional visual inspection and air pressure testing, ultrasonic detection can not only detect tiny internal leaks but also accurately locate the leakage points, thus avoiding missed detections and misdetections and improving the detection accuracy.

[0021] 3. The present utility model adopts an automated channel conversion mechanism and manipulator operation, reducing the dependence on manual operation. By controlling the switching of the conversion valve core through the driving air cylinder, the detection process is fully automated, eliminating the uncertainties brought by manual operation. This automated design not only improves the stability and consistency of the detection results but also reduces the work intensity and skill requirements of the operators, making it suitable for industrial applications of regular batch detection.

[0022] Other advantages, objectives, and features of the present utility model will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be learned from the practice of the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the following will give a preferred and detailed description of the present utility model in conjunction with the accompanying drawings, where:

[0024] Figure 1 It is the overall schematic diagram of the undetected inspection device in the automotive evaporator core of the present utility model.

[0025] Figure 2 It is the front view of the undetected inspection device in the automotive evaporator core of the present utility model.

[0026] Figure 3 It is the side view of the undetected inspection device in the automotive evaporator core of the present utility model.

[0027] Figure 4 It is the enlarged schematic diagram of the detection station of the present utility model.

[0028] Figure 5 , 6 It is the structural schematic diagram of the channel conversion mechanism of the present utility model.

[0029] Reference numerals: 1 - detection platform; 2 - sorting channel; 3 - first detection station; 4 - second detection station; 5 - evaporator core; 6 - channel conversion mechanism; 7 - manipulator; 8 - connecting block; 9 - pressing cylinder; 61 - conversion block; 62 - ultrasonic receiving port; 63 - ultrasonic emitting port; 64 - first outlet; 65 - second outlet; 66 - first inlet; 67 - second inlet; 68 - conversion valve core; 681 - through hole; 682 - sealing ring. Specific embodiments

[0030] The following illustrates the implementation manners of the present utility model through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of the present utility model. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0031] Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams rather than physical diagrams, and should not be construed as a limitation to the present utility model; for better illustrating the embodiments of the present utility model, some components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0032] In the attached drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the attached drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the attached drawings are only for illustrative purposes and cannot be construed as a limitation of the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] Please refer to Figures 1 to 6 , which is a device for detecting internal leakage in an automotive evaporator core body, including a detection platform 1 and an ultrasonic detection system. There are two detection stations arranged on the detection platform 1: the first detection station 3 and the second detection station 4, which are used to place the evaporator core body 5; a connecting block 8 is arranged on each detection station, and the connecting block 8 is used to connect with the interface of the evaporator core body 5; the ultrasonic detection system is simultaneously connected to the two connecting blocks 8 through a channel conversion mechanism 6 in the middle of the first detection station 3 and the second detection station 4, and is switched through the channel conversion mechanism 6, so that the ultrasonic detection system is only connected to one of the two detection stations of the evaporator core body 5. The ultrasonic wave emitted returns to the ultrasonic detection system after propagating through the evaporator core body 5, thereby detecting the internal leakage of the evaporator core body 5.

[0034] A manipulator 7 is arranged on each detection station, which is used to clamp the evaporator core body 5 for loading and unloading. The manipulator 7 is arranged above the detection station and fixed to the top of the detection platform 1. A telescopic cylinder and a pressing cylinder 9 are also arranged on the detection station. The pressing cylinder 9 is arranged above the evaporator core body 5 and is used to press and fix the evaporator core body 5; the telescopic cylinder is connected to the connecting block 8 and drives the connecting block 8 to move to dock with or separate from the evaporator core body 5.

[0035] The ultrasonic detection system is arranged inside the detection platform 1 and is located below the detection station. A sorting port is arranged on one side of the detection station on the detection platform 1, and an inclined sorting channel 2 is arranged below the sorting port. The manipulator 7 puts the unqualified evaporator core body 5 into the sorting port and into the sorting channel 2.

[0036] Moving rollers are arranged below the detection platform 1, which is convenient for the overall movement of the device.

[0037] In this embodiment, the channel conversion mechanism 6 includes a conversion block 61, a conversion valve core 68, and a driving cylinder; a first outlet 64, a first inlet 66, a second outlet 65, a second inlet 67, an ultrasonic emission port 63, and an ultrasonic reception port 62 are provided on the conversion block 61; the conversion valve core 68 is slidably arranged in the conversion block 61 and is connected to the driving cylinder; the connecting blocks 8 at the two detection stations, one of which is communicated with the first outlet 64 and the first inlet 66, and the other is communicated with the second outlet 65 and the second inlet 67; both the ultrasonic emission port 63 and the ultrasonic reception port 62 are connected to the ultrasonic detection system.

[0038] There are two conversion valve cores 68, which are connected to the same driving cylinder; the first outlet 64 and the second outlet 65 are arranged along the axial direction of one of the conversion valve cores 68, and the first inlet 66 and the second inlet 67 are arranged along the axial direction of the other conversion valve core 68.

[0039] The two conversion valve cores 68 are slidably sealed with the conversion block 61 through a sealing ring 682, and the two conversion valve cores 68 are arranged side by side; through holes 681 are provided on both of the two conversion valve cores 68, one end of the through hole 681 of one of them is communicated with the ultrasonic emission port 63, and the other end slides between the first outlet 64 and the second outlet 65, so as to control the on-off of the first outlet 64, the second outlet 65 and the ultrasonic emission port 63; one end of the through hole 681 on the other conversion valve core 68 is communicated with the ultrasonic reception port 62, and the other end slides between the first inlet 66 and the second inlet 67, so as to control the on-off of the first inlet 66, the second inlet 67 and the ultrasonic reception port 62.

[0040] Driven by the driving cylinder, the conversion valve core 68 makes the first outlet 64 and the first inlet 66 conduct with the ultrasonic system at the same time or makes the second outlet 65 and the second inlet 67 conduct with the ultrasonic system at the same time; the ultrasonic wave emitted by the ultrasonic detection system propagates through the conversion block 61 to the evaporator core 5 and then returns to the ultrasonic detection system through the conversion block 61, so as to detect the evaporator core 5 by ultrasonic wave. The unqualified evaporator core 5 is put into the sorting port beside the detection station by the manipulator 7 and flows into the rework process through the sorting channel 2 below.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A leakage detection device for an automobile evaporator core, comprising a detection platform and an ultrasonic detection system, characterized in that: Two inspection stations are provided on the inspection platform for placing the evaporator core; each inspection station is provided with a connection block, which is used to connect with the interface of the evaporator core; the ultrasonic detection system is connected to the two connection blocks at the same time through a channel conversion mechanism, and is switched through the channel conversion mechanism so that the ultrasonic detection system is connected to only one of the evaporator cores in the two inspection stations, and the emitted ultrasonic wave propagates through the evaporator core and then returns to the ultrasonic detection system, thereby performing internal leakage detection on the evaporator core.

2. The automobile evaporator core leakage detection device according to claim 1, characterized in that: The channel conversion mechanism includes a conversion block, a conversion valve core, and a driving cylinder; the conversion block is provided with a first outlet, a first inlet, a second outlet, a second inlet, an ultrasonic emitting outlet, and an ultrasonic receiving outlet; the conversion valve core is slidably arranged in the conversion block and connected to the driving cylinder; one of the connecting blocks on the two detection stations is connected to the first outlet and the first inlet, and the other is connected to the second outlet and the second inlet; the ultrasonic emitting outlet and the ultrasonic receiving outlet are both connected to the ultrasonic detection system, and under the drive of the driving cylinder, the conversion valve core makes the first outlet and the first inlet simultaneously connected to the ultrasonic system or makes the second outlet and the second inlet simultaneously connected to the ultrasonic system; The ultrasonic wave emitted by the ultrasonic detection system is transmitted to the evaporator core through the conversion block, and then returns to the ultrasonic detection system through the conversion block, so that the evaporator core is detected by the ultrasonic wave.

3. The automobile evaporator core internal leakage detection device according to claim 2, characterized in that: There are two conversion valve cores connected to the same driving cylinder; the first outlet and the second outlet are arranged axially along one of the conversion valve cores, and the first inlet and the second inlet are arranged axially along the other conversion valve core.

4. The automobile evaporator core internal leakage detection device according to claim 3, characterized in that: The conversion valve core is provided with a through hole, one end of which is connected to the ultrasonic emitting port or the ultrasonic receiving port, and the other end of the through hole slides between the first outlet and the second outlet or between the first inlet and the second inlet, thereby controlling the on-off of the channel in the conversion valve core; the conversion valve core is slidably sealed with the conversion block through a sealing ring.

5. The vehicle evaporator core leakage detection device according to claim 1, characterized in that: Each inspection station is equipped with a robot to clamp the evaporator core and load and unload it.

6. The automobile evaporator core internal leakage detection device according to claim 5, characterized in that: The manipulator is arranged above the detection station and fixed on the top of the detection platform.

7. The automobile evaporator core internal leakage detection device according to claim 1, characterized in that: The inspection station is also provided with a telescopic cylinder and a pressing cylinder. The pressing cylinder is arranged above the evaporator core and is used to press and fix the evaporator core. The telescopic cylinder is connected to the connecting block and drives the connecting block to move to dock with or separate from the evaporator core.

8. The automobile evaporator core internal leakage detection device according to claim 1, characterized in that: The channel conversion mechanism is located between two detection stations, and the ultrasonic detection system is arranged in the detection platform and below the detection station.

9. The automobile evaporator core internal leakage detection device according to claim 5, characterized in that: A sorting port is provided on one side of the inspection station on the inspection platform, and an inclined sorting channel is provided below the sorting port. The robot puts the unqualified evaporator core into the sorting port and enters the sorting channel.

10. The automobile evaporator core internal leakage detection device according to claim 1, characterized in that: A movable roller is arranged below the detection platform.

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