Inert gas automatic recovery equipment, inert gas recovery system and inert gas recovery method

Abstract

The invention provides automatic inert gas recovery equipment, an inert gas recovery system and an inert gas recovery method, and belongs to the technical field of air conditioner production. The recovery equipment comprises a rack, the rack is arranged on one side of a conveying line, and the conveying line is used for conveying heat exchangers. The automatic inert gas recovery equipment further comprises a recovery structure. The recovery structure comprises a first clamping structure, a recovery connector and a detection assembly. The recycling connector is used for being in butt joint with a connector of the heat exchanger copper pipe, and the first clamping structure is arranged on one side of the recycling connector and used for fixing the heat exchanger copper pipe. The detection assembly is arranged close to the recovery connector and used for controlling connection and disconnection between the recovery connector and the connector of the heat exchanger copper pipe according to the detection result. The equipment can automatically recover inert gas such as helium in the heat exchanger, the gas recovery efficiency can be improved, the labor intensity of workers is effectively reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioner production, and in particular to an inert gas automatic recovery device, an inert gas recovery system and a recovery method. BACKGROUND

[0002] In the field of air conditioner manufacturing, the inert gas needs to be recovered after the helium filling leak detection process of the evaporator copper pipe is completed. At present, the inert gas is recovered by manual operation in the industry: the operator needs to manually connect the inert gas pipe joint with the evaporator copper pipe, and the inert gas recovery state is observed by visual observation of the pressure gauge or experience. The efficiency of manual operation is low, and the operation speed is limited by human output, which is difficult to match the rhythm requirements of large-scale production. Especially when processing products in batches, the bottleneck problem of recovery efficiency is particularly prominent. The completion degree of inert gas recovery and the initial sealing of the copper pipe lack objective detection means, and incomplete recovery or missed leak detection points are easily caused by human negligence. In addition, manual operation has high labor cost, high intensity and is prone to operation errors caused by repetitive work.

[0003] Therefore, it is necessary to improve the existing inert gas recovery method to overcome the defects of the prior art. SUMMARY

[0004] To overcome the problems in the related art, one of the purposes of the present application is to provide an inert gas automatic recovery device, which can automatically recover inert gas such as helium in a heat exchanger, improve gas recovery efficiency, effectively reduce labor intensity of employees, and improve production efficiency.

[0005] An inert gas automatic recovery device, comprising a rack, the rack is arranged on one side of a conveying line, and the conveying line is used for conveying a heat exchanger;

[0006] The inert gas automatic recovery device further comprises a recovery structure, the recovery structure comprises a first clamping structure, a recovery joint and a detection assembly; the recovery joint is used for connecting with the joint of the heat exchanger copper pipe, the first clamping structure is arranged on one side of the recovery joint and is used for fixing the heat exchanger copper pipe; and the detection assembly is arranged close to the recovery joint and is used for controlling the on-off between the recovery joint and the joint of the heat exchanger copper pipe according to the detection result.

[0007] The device can realize full-automatic operation of the processes of evaporator conveying, copper pipe fixing, pressure detection, helium recovery and the like through the automation device and system, can shorten the recovery time of the inert gas of the evaporator, and improve the recovery efficiency. Moreover, the recovery device can realize unattended operation, only needs to be regularly inspected, greatly reduces the labor input, and reduces the labor cost of enterprises. The pressure sensor of the detection assembly has high measurement precision, can accurately judge the helium pressure in the copper pipe, and ensures that only qualified helium enters the recovery process; the helium recovery filtering device can improve the purity of the recovered helium, meets the recycling requirement of helium in air conditioner production, reduces helium waste, and reduces the raw material cost of enterprises.

[0008] In the preferable technical scheme of the present application, the detection assembly comprises a detection main body, a recovery interface and a docking interface are arranged on the detection main body and communicate with each other, the recovery interface is connected with a recovery host, the docking interface communicates with the recovery joint, a pressure detector and an electromagnetic valve are arranged between the docking interface and the recovery joint, and the pressure detector is electrically connected with the electromagnetic valve.

[0009] The present embodiment provides the detailed structure of the detection assembly. In actual application, the docking interface is used for quick connection with the recovery joint, and the recovery interface is connected with the recovery host, so that the recovery host can recover the inert gas in the heat exchanger through the pipeline communicated by the recovery joint and the docking interface.

[0010] In the preferable technical scheme of the present application, a plurality of docking interfaces are arranged on the detection main body, and each docking interface communicates with one recovery joint.

[0011] The design of the plurality of docking interfaces and recovery joints forms a plurality of groups of independently arranged docking interfaces, pressure detectors and electromagnetic valves, and the pressure detection and helium recovery of a plurality of groups of copper pipes of evaporators can be simultaneously completed, so that batch processing of the inert gas recovery of the heat exchanger is realized.

[0012] Compared with the manual single-time processing mode capable of processing only one group, the batch processing efficiency of the present application is greatly improved, and the flow line operation rhythm of air conditioner production can be met.

[0013] In the preferable technical scheme of the present application, the recovery structure further comprises a mounting plate and a second clamping structure, the recovery joint and the second clamping structure are arranged on the mounting plate, the first clamping structure is arranged below the recovery joint, and the second clamping structure is arranged on one side of the recovery joint.

[0014] The second clamping structure comprises a first guide rod, a first lifting plate and a clamping plate, the first guide rod is fixed on the mounting plate, the first lifting plate is slidably arranged on the first guide rod, and the clamping plate is arranged on the first lifting plate, and a copper pipe clamping position is arranged on the clamping plate.

[0015] A first lifting driving device is arranged on the mounting plate to drive the first lifting plate to move along the axis direction of the first guide rod.

[0016] In actual application, through the cooperation of the first clamping structure (lower clamping) and the second clamping structure (upper limiting), the copper pipe can be fixed in all directions in the "up-down + horizontal" mode, the joint misalignment problem caused by the shaking of the copper pipe during traditional manual butt joint is avoided, the positioning accuracy of the copper pipe is improved, and the butt joint reliability is ensured.

[0017] In the preferred technical scheme of the present application, the first clamping structure comprises a clamp and an opening and closing driving device, the clamp comprises two oppositely arranged clamping blocks, the two clamping blocks are arranged below the recovery joint, a clamping position is formed between the two clamping blocks, and the opening and closing driving device drives the two clamping blocks to move close to or away from each other.

[0018] The clamping blocks can be designed in an arc shape, and fluororubber pads can be arranged on one side of the clamping blocks to reduce damage to the copper pipe. Compared with the traditional manual fixing mode, the clamping force is more uniform through the design of double clamping block arc clamping + fluororubber pad. In actual application, the opening and closing driving device automatically completes the "clamping - loosening" action through a cylinder, and manual fixing of the copper pipe by an operator is not required. In combination with the signal feedback of a magnetic switch, the whole process is realized without human intervention, the manual operation steps are reduced, the labor intensity of the employees is reduced, and production failures caused by human operation errors (such as insufficient clamping force and position deviation) are avoided.

[0019] In the preferred technical scheme of the present application, a translation mechanism and a lifting mechanism for driving the recovery structure to move are further included.

[0020] The lifting mechanism comprises a second guide rod, a second lifting plate and a second lifting driving device; the second guide rod is fixed on the rack, the second lifting plate is slidably arranged on the second guide rod, and the second lifting driving device is arranged on the rack, and the output end of the second lifting driving device is fixedly connected with the second lifting plate.

[0021] The translation mechanism comprises a mounting seat and a translation driving device, a guide rail is arranged on the second lifting plate, the mounting seat is slidably arranged on the guide rail, and the translation driving device drives the mounting seat to slide on the guide rail; and the mounting plate of the recovery structure is arranged on the mounting seat.

[0022] In actual application, the lifting mechanism can adopt the design of a ball screw sliding table, the translation mechanism adopts a linear guide rail + a rodless cylinder to implement, and the high-precision displacement of the recovery structure is realized through cooperation of the two, so that the butt joint coaxiality of the recovery joint and the copper pipe joint is improved, the butt joint leakage rate is reduced, and the efficient recovery of helium is ensured.

[0023] In the preferred technical solution of the present application, a plurality of translation mechanisms are arranged on the second lifting plate, and a recovery structure is arranged on the mounting seat of each translation mechanism.

[0024] The rectangular distribution of the four guide rods of the lifting mechanism and the design of the buffer block of the translation mechanism effectively avoid tilting and collision in the displacement process, thereby enhancing the operation stability of the equipment and reducing the fault downtime.

[0025] The second object of the present application is to provide an inert gas recovery system, which comprises a conveying line and the inert gas automatic recovery equipment as described above, and the inert gas automatic recovery equipment is arranged on one side of the conveying line.

[0026] The linkage design of the conveying line and the automatic recovery equipment, in cooperation with the batch carrying function of the placing rack, realizes the continuous operation of the evaporator "as received as recovered", compared with the traditional manual carrying to the fixed recovery table, the recovery efficiency of the inert gas of the evaporator can be improved, and the production capacity demand of the air conditioner production line can be met.

[0027] In the preferred technical solution of the present application, a placing rack for carrying the heat exchanger is arranged on the conveying line, the placing rack comprises a bottom plate, two opposite limiting plates are arranged on the bottom plate, a placing position for accommodating the heat exchanger is formed between the two limiting plates, and a clamping plate for clamping the copper pipe is arranged on any one of the limiting plates.

[0028] The clamping plate of the placing rack realizes the rapid positioning of the copper pipe, and the operator only needs to place the evaporator into the placing rack, without manually adjusting the position of the copper pipe; the automatic recovery equipment automatically adapts to the placing rack through the photoelectric sensor and the positioning cylinder, and the whole process does not need manual intervention, thereby reducing the full-time operators and reducing the labor cost of the enterprise. More preferably, the spacing of the limiting plates of the placing rack and the number of clamping slots can be adjusted according to the specifications of the evaporator (for example, the number of clamping slots is increased to 4 groups to adapt to larger batch recovery), the speed of the conveying line can be adjusted according to the production rhythm, the translation and lifting stroke of the automatic recovery equipment can be adapted to different sizes of the placing rack through parameter setting, without hardware modification, and the recovery requirements of different evaporators in air conditioner production can be met, thereby reducing the repeated investment in equipment.

[0029] The third object of the present application is to provide an inert gas recovery method, which is implemented based on the inert gas recovery system as described above.

[0030] The present application has the following advantages:

[0031] The present application provides an inert gas automatic recovery device, which comprises a rack arranged on one side of a conveying line for conveying a heat exchanger. The inert gas automatic recovery device further comprises a recovery structure, which comprises a first clamping structure, a recovery joint and a detection assembly. The recovery joint is used for butt joint with a joint of a copper pipe of the heat exchanger, and the first clamping structure is arranged on one side of the recovery joint and used for fixing the copper pipe of the heat exchanger. The detection assembly is arranged close to the recovery joint and used for controlling the on-off between the recovery joint and the joint of the copper pipe of the heat exchanger according to a detection result. In use, the conveying line is used for conveying the heat exchanger with the gas to be recovered. When the heat exchanger reaches one side of the recovery structure, the conveying line is paused, and the heat exchanger is positioned. Then, the first clamping structure is started to fix the copper pipe of the heat exchanger and enable the recovery joint to butt joint with the joint of the copper pipe of the heat exchanger. After the butt joint, the detection assembly detects the state of the heat exchanger. If the state of the heat exchanger is qualified, the detection assembly controls the communication between the recovery joint and the joint of the copper pipe of the heat exchanger, so that the gas in the heat exchanger can be recovered. If the state of the heat exchanger is not qualified, the detection assembly controls the non-communication between the recovery joint and the joint of the copper pipe of the heat exchanger, so that the gas is not recovered. The device can shorten the recovery time of the gas in the heat exchanger and improve the recovery efficiency through the automatic butt joint, detection and recovery process. The device can continuously work and adapt to the batch production rhythm of the production line. In addition, the device can reduce the frequency of bending and handheld operation of the staff, reduce the labor risk and save manpower and resources.

[0032] The present application also provides a recovery system and a recovery method comprising the above-mentioned inert gas automatic recovery device. The system can realize the automatic recovery of the gas in the heat exchanger, improve the efficiency of the gas recovery, and prevent the gas backflow of the recovery system through the detection The control of the on-off of the gas and the one-way valve can prevent the safety hidden danger caused by the gas leakage or pressure fluctuation during the manual operation. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a schematic diagram of the inert gas automatic recovery device provided in the embodiments of the present application;

[0034] Figure 2 is a schematic diagram of the recovery structure provided in the embodiments of the present application and arranged on a second lifting plate;

[0035] Figure 3 is a schematic diagram of the mounting plate provided in the embodiments of the present application and arranged on a mounting seat;

[0036] Figure 4 is a perspective view of the detection assembly provided in the embodiments of the present application;

[0037] Figure 5is a schematic view of the inside of a detection assembly provided in an embodiment of the present application;

[0038] Figure 6 is a schematic view of a placement rack provided in an embodiment of the present application.

[0039] Reference signs:

[0040] 1, rack; 2, lifting mechanism; 21, second lifting driving device; 22, second guide rod; 23, second lifting plate; 3, recovery structure; 31, mounting plate; 32, recovery joint; 33, first clamping structure; 331, opening and closing driving device; 332, clamping block; 34, second clamping structure; 341, first guide rod; 342, first lifting plate; 343, clamping plate; 3431, copper pipe clamping position; 4, recovery structure; 41, guide rail; 42, mounting seat; 43, translation driving device; 5, detection assembly; 51, detection main body; 52, recovery interface; 53, docking interface; 54, electromagnetic valve; 55, pressure detector; 100, placement rack; 110, bottom plate; 120, limiting plate; 130, clamping plate. DETAILED DESCRIPTION

[0041] Preferred embodiments of the present application will be described in more detail with reference to the drawings. Although the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application is more thoroughly and completely conveyed to those skilled in the art, and the scope of the present application is fully conveyed to those skilled in the art.

[0042] In the field of air conditioner manufacturing, the evaporator copper pipe needs to be recovered after completing the helium leak detection process. Currently, the industry generally uses manual operation to recover inert gas: the operator needs to manually connect the inert gas pipe joint with the evaporator copper pipe, and visually observe the pressure gauge or use experience to judge the inert gas recovery state. Manual operation is inefficient, and the operation speed is limited by human output, making it difficult to match the rhythm requirements of large-scale production. In particular, when processing products in batches, the bottleneck problem of recovery efficiency is particularly prominent. The completion degree of inert gas recovery and the initial sealing of the copper pipe lack objective detection means, and are prone to incomplete recovery or missed leak detection due to human negligence. In addition, manual operation has high labor costs, high physical strength, and is prone to operation errors due to repetitive tasks.

[0043] Based on this, the present application provides an inert gas automatic recovery equipment.

[0044] Embodiment 1

[0045] As Figures 1-5As shown, the inert gas automatic recovery equipment provided by the embodiment comprises a rack 1, which is arranged on one side of a conveying line for conveying a heat exchanger;

[0046] The inert gas automatic recovery equipment further comprises a recovery structure 43, which comprises a first clamping structure 33, a recovery joint 32 and a detection assembly 5; the recovery joint 32 is used for being connected with the joint of the heat exchanger copper pipe, the first clamping structure 33 is arranged on one side of the recovery joint 32 and is used for fixing the heat exchanger copper pipe; and the detection assembly 5 is arranged close to the recovery joint 32 and is used for controlling the on-off between the recovery joint 32 and the joint of the heat exchanger copper pipe according to the detection result.

[0047] The equipment can realize full-automatic operation of the processes of evaporator conveying, copper pipe fixing, pressure detection and helium recovery through automatic equipment and system, can shorten the recovery time of the inert gas of the evaporator and improve the recovery efficiency. In addition, the recovery equipment can realize unattended operation and only needs to be regularly inspected, which greatly reduces the labor input and reduces the labor cost of enterprises. The pressure sensor of the detection assembly 5 has high measurement accuracy and can accurately judge the helium pressure in the copper pipe, so that only qualified helium enters the recovery process; the helium recovery filtering device can improve the purity of the recovered helium, meet the recycling requirement of helium in air conditioner production, reduce helium waste and reduce the raw material cost of enterprises.

[0048] The inert gas automatic recovery equipment described above, in the use process, the heat exchanger for recovering gas is conveyed by the conveying line, when the heat exchanger reaches one side of the recovery structure 43, the conveying line is paused and the heat exchanger is positioned. Then the first clamping structure 33 is started to fix the heat exchanger copper pipe and make the recovery joint 32 be connected with the joint of the heat exchanger copper pipe; after the connection, the detection assembly 5 detects the state of the heat exchanger. If the state of the heat exchanger is qualified, the detection assembly 5 controls the communication between the recovery joint 32 and the joint of the heat exchanger copper pipe, so that the gas in the heat exchanger can be recovered; if the state of the heat exchanger is not qualified, the detection assembly 5 controls the non-communication between the recovery joint 32 and the joint of the heat exchanger copper pipe, so that the gas recovery is not performed. Through the automatic connection, detection and recovery processes, the equipment can shorten the recovery time of the gas in the heat exchanger, improve the recovery efficiency, and can work continuously and adapt to the batch production rhythm of the production line. In addition,

[0049] Embodiment 2

[0050] The embodiment is improved on the basis of embodiment 1.

[0051] As Figures 1-5As shown, in this embodiment, a specific implementation of the detection component 5 is provided. Specifically, the detection component 5 includes a detection body 51, on which a recycling interface 52 and a docking interface 53 are provided, which are interconnected. The recycling interface 52 is externally connected to a recycling host, and the docking interface 53 is connected to the recycling connector 32. A pressure detector 55 and a solenoid valve 54 are provided between the docking interface 53 and the recycling connector 32, and the pressure detector 55 is electrically connected to the solenoid valve 54.

[0052] More specifically, this embodiment provides a detailed structure of the detection component 5. In practical applications, the docking interface 53 is used for quick connection with the recovery connector 32. The recovery interface 52 is externally connected to the recovery host, enabling the recovery host to recover the inert gas in the heat exchanger through the pipeline connected to the recovery connector 32 and the docking interface 53.

[0053] More preferably, in this embodiment, the detection body 51 is provided with a plurality of docking interfaces 53, and each docking interface 53 is connected to a recycling connector 32.

[0054] The design of several docking interfaces 53 and recovery connectors 32 forms multiple independent docking interfaces 53, pressure detectors 55 and solenoid valves 54 configurations, which can simultaneously complete the pressure detection and helium recovery of multiple evaporator copper tubes, and realize the batch processing of inert gas recovery from heat exchangers.

[0055] Compared to the manual processing of one batch at a time, this solution significantly improves batch processing efficiency and can meet the production line operation rhythm of air conditioner production.

[0056] Example 3

[0057] This embodiment is an improvement on embodiment 2.

[0058] like Figures 1-5 As shown, in this embodiment, the recycling structure 43 further includes a mounting plate 31 and a second snap-fit ​​structure 34. The recycling connector 32 and the second snap-fit ​​structure 34 are both disposed on the mounting plate 31. The first snap-fit ​​structure 33 is disposed below the recycling connector 32, and the second snap-fit ​​structure 34 is disposed on one side of the recycling connector 32.

[0059] The second snap-fit ​​structure 34 includes a first guide rod 341, a first lifting plate 342, and a snap-fit ​​plate 343. The first guide rod 341 is fixed on the mounting plate 31. The first lifting plate 342 is slidably disposed on the first guide rod 341. The snap-fit ​​plate 343 is disposed on the first lifting plate 342. A copper tube snap-fit ​​position 3431 is provided on the snap-fit ​​plate 343.

[0060] The mounting plate 31 is provided with a first lifting driving device for driving the first lifting plate 342 to move along the axis direction of the first guide rod 341.

[0061] In actual application, through the cooperation of the first clamping structure 33 (lower clamping) and the second clamping structure 34 (upper limiting), the copper pipe can be fixed in all directions of "up and down + transverse", avoiding the misalignment of the joint caused by the shaking of the copper pipe during traditional manual docking, thereby improving the positioning accuracy of the copper pipe and ensuring the reliability of the docking.

[0062] In this embodiment, the first clamping structure 33 includes a clamp and an opening and closing driving device 331, the clamp includes two oppositely arranged clamping blocks 332, the two clamping blocks 332 are arranged below the recovery joint 32, a clamping position is formed between the two clamping blocks 332, and the opening and closing driving device 331 drives the two clamping blocks 332 to approach or move away from each other.

[0063] The clamping block 332 can be designed in an arc shape, and a fluororubber pad can be arranged on one side of the clamping block 332 to reduce damage to the copper pipe. Compared with the traditional manual fixing method, the clamping force is more uniform by using the double clamping block 332 arc clamping + fluororubber pad design. In actual application, the opening and closing driving device 331 automatically completes the "clamping - loosening" action through the cylinder, without the need for manual fixing of the copper pipe by the operator. Combined with the signal feedback of the magnetic switch, the whole process is realized without human intervention, reducing the manual operation steps, reducing the labor intensity of the employees, and avoiding production failures caused by human operation errors (such as insufficient clamping force and position deviation).

[0064] Embodiment 4

[0065] This embodiment is improved on the basis of embodiment 3.

[0066] As shown in Figures 1-5 In this embodiment, a translation mechanism and a lifting mechanism 2 for driving the recovery structure 43 to move are also included.

[0067] The lifting mechanism 2 includes a second guide rod 22, a second lifting plate 23, and a second lifting driving device 21; the second guide rod 22 is fixed on the rack 1, the second lifting plate 23 is slidably arranged on the second guide rod 22, the second lifting driving device 21 is arranged on the rack 1, and the output end of the second lifting driving device 21 is fixedly connected with the second lifting plate 23;

[0068] The translation mechanism comprises a mounting seat 42 and a translation driving device 43, the second lifting plate 23 is provided with a guide rail 41, the mounting seat 42 is slidably arranged on the guide rail 41, and the translation driving device 43 drives the mounting seat 42 to slide on the guide rail 41; the mounting plate 31 of the recovery structure 43 is arranged on the mounting seat 42.

[0069] In actual application, the lifting mechanism 2 can adopt the design of a ball screw sliding table, the translation mechanism adopts a linear guide rail 41+rodless cylinder to implement, and the two mechanisms cooperatively realize high-precision displacement of the recovery structure 43, can improve the butt joint coaxiality of the recovery joint 32 and the copper pipe joint, reduce butt joint leakage rate, and ensure efficient helium recovery.

[0070] In the embodiment, the translation mechanism is arranged on the second lifting plate 23, and the mounting seat 42 of each translation mechanism is provided with one recovery structure 43.

[0071] The rectangular distribution of the guide rods of the lifting mechanism 24 and the buffer block design of the translation mechanism effectively avoid inclination and collision in the displacement process, thereby enhancing equipment operation stability and reducing fault downtime.

[0072] Embodiment 5

[0073] As shown in Figures 1-6 The embodiment provides an inert gas recovery system, which comprises a conveying line and the inert gas automatic recovery equipment as described above, and the inert gas automatic recovery equipment is arranged on one side of the conveying line.

[0074] The linkage design of the conveying line and the automatic recovery equipment, in cooperation with the batch carrying function of the placing rack 100, realizes continuous operation of the evaporator “as received as recovered”, compared with the traditional manual carrying to the fixed recovery table, can improve the recovery efficiency of the inert gas of the evaporator, and meets the production capacity demand of the air conditioner production line.

[0075] In the embodiment, the conveying line is provided with a placing rack 100 for carrying a heat exchanger, the placing rack 100 comprises a bottom plate 110, two oppositely arranged limiting plates 120 are arranged on the bottom plate 110, a placing position for accommodating the heat exchanger is formed between the two limiting plates 120, and a clamping plate 130 for clamping the copper pipe is arranged on any one of the limiting plates 120.

[0076] The clamping plate 130 of the placing rack 100 realizes quick positioning of the copper pipe. The operator only needs to place the evaporator into the placing rack 100, without manually adjusting the position of the copper pipe. The automatic recovery equipment automatically adapts to the placing rack 100 through the photoelectric sensor and the positioning cylinder, and the whole process does not need manual intervention, thereby reducing the full-time operator and reducing the labor cost of the enterprise. More preferably, the spacing of the limiting plate 120 of the placing rack 100 and the number of clamping slots can be adjusted according to the specifications of the evaporator (for example, the number of clamping slots is increased to 4 groups to adapt to larger batch recovery), and the conveying line speed can be adjusted according to the production rhythm. The translation and lifting stroke of the automatic recovery equipment can be adapted to different sizes of the placing rack 100 through parameter setting, without hardware modification, which can meet the recovery needs of different evaporators in air conditioner production and reduce repeated investment in equipment.

[0077] More specifically, the conveying line of the present application is implemented by using a speed-up chain. The conveying direction of the speed-up chain is connected with the recovery structure 43 (including the translation mechanism, the lifting mechanism 2, and the clamping assembly) of the inert gas automatic recovery equipment, and bears the function of transferring the workstations of the evaporator. The track width of the conveying line is adapted to the size of the placing rack 100, and the conveying speed can be adjusted within the range of 0.5-2 m / min, which is matched with the single recovery cycle (about 2 minutes / batch) of the automatic recovery equipment, to ensure that each batch of evaporators can be accurately stopped at the recovery workstation. The inert gas automatic recovery equipment is arranged on one side of the conveying line, and the spacing between the equipment rack 1 and the track of the conveying line is fixed at 800 mm, to ensure that the translation mechanism can accurately connect with the copper pipe of the evaporator on the conveying line when it is extended. The blocking cylinder, the front pushing cylinder, and the downward pressing cylinder of the equipment are linked with the photoelectric sensor of the conveying line, to realize the automatic positioning and fixing of the evaporator.

[0078] When the system is working, the evaporator is placed on the placing rack 100 of the conveying line and transferred to the corresponding workstation of the automatic recovery equipment by the speed-up chain. After the photoelectric sensor of the conveying line detects the placing rack 100, a signal is sent to the main controller of the equipment, and the main controller controls the blocking cylinder to extend and limit the placing rack 100 at the recovery workstation. Then, the front pushing cylinder and the downward pressing cylinder act to fix the placing rack 100 (including the evaporator) in place. The translation mechanism and the lifting mechanism 2 of the automatic recovery equipment drive the recovery structure 43 to connect with the copper pipe, to complete the pressure detection and helium recovery. After the recovery is completed, the blocking cylinder is retracted, and the placing rack 100 is transferred to the next process with the conveying line, to realize the continuous operation of “transfer-positioning-recovery-release”.

[0079] The positioning hole of the bottom plate 110 of the placing rack 100 is accurately matched with the positioning pin (diameter 10 mm, length 20 mm) of the downward pressing cylinder of the automatic recovery equipment. When the front pushing cylinder pushes the placing rack 100 to the fixed position, the positioning pin of the downward pressing cylinder is inserted into the positioning hole of the bottom plate 110, to realize the “horizontal+vertical” double fixation of the placing rack 100, and to provide the basic accuracy for the connection between the copper pipe and the recovery connector 32.

[0080] The positioning section of the snap-fit ​​slot of the snap-fit ​​plate 130 of the placement rack 100 forms a "triple positioning" with the first snap-fit ​​structure 33 (double snap-fit ​​block 332) and the second snap-fit ​​structure 34 (U-shaped groove) of the automatic recycling equipment: the snap-fit ​​slot first fixes the copper tube initially, the first snap-fit ​​structure 33 clamps the copper tube from below, and the second snap-fit ​​structure 34 limits the copper tube from the side and above. The three work together to control the displacement of the copper tube within a small range, ensuring that the coaxiality of the docking of the recycling connector 32 and the black plastic connector of the evaporator is high, and avoiding helium leakage.

[0081] Example 6

[0082] like Figures 1-6 As shown, this embodiment provides an inert gas recovery method, which is implemented based on the inert gas recovery system described above.

[0083] Specifically, the steps of this method are as follows:

[0084] The operator places the evaporator (copper tube with black plastic connector) of the indoor air conditioner on the placement rack 100 of the conveyor line. The evaporator body is embedded in the placement position between the two limiting plates 120 of the placement rack 100. At the same time, the operator aligns the three sets of copper tubes of the evaporator (corresponding to the batch recycling requirements) with the "guide section" of the snap-fit ​​plate 130 and pushes them into the "positioning section" along the guide section until the outer wall of the copper tube is tightly attached to the fluororubber pad in the groove, thus completing the initial fixation of the copper tube.

[0085] The system touchscreen is used to set the conveyor speed to 1m / min. After the conveyor is started, the placement rack 100 moves with the conveyor, driving the evaporator to the corresponding recovery station of the inert gas automatic recovery equipment.

[0086] When the placement rack 100 moves to the recycling station, the photoelectric sensor (model E3F-DS30C4) on the side of the conveyor line detects the edge of the placement rack 100 and immediately sends a "station arrival" signal to the system main controller. After receiving the signal, the main controller controls the blocking cylinder of the automatic recycling equipment to extend and block the placement rack 100, so that the placement rack 100 initially stops within the recycling station range.

[0087] The main controller synchronously starts the forward thrust cylinder (model SC63×50) and the downward thrust cylinder (model...).

[0088] SC40×30): The forward-pushing cylinder pushes the placement rack 100 toward the side of the automatic recycling equipment until the positioning hole of the placement rack 100 base plate 110 is aligned with the positioning pin of the pressing cylinder; then the pressing cylinder is activated, the positioning pin is inserted into the positioning hole, and the placement rack 100 is fixed in a "horizontal + vertical" dual manner; at the same time, the photoelectric sensing hole on the top of the placement rack 100 snap-fit ​​plate 130 is aligned with the photoelectric sensor of the automatic recycling equipment translation component, the sensor feeds back the "placement rack 100 is positioned in place" signal, and the main controller confirms that the subsequent actions can be started.

[0089] The main controller sends an "extend" command to the translation mechanism, and the rodless cylinder (model SMCMY1 B25-150) of the translation mechanism is vented, driving the mounting base 42 (equipped with the recovery structure 43) to slide along the linear guide rail 41 of the second lifting plate 23 (translation stroke 150mm); when the mounting base 42 moves to the preset position, the recovery connector 32 of the recovery structure 43 and the copper tube on the snap plate 130 of the placement rack 100 are in the same vertical plane. At this time, the proximity switch (model OmronE2E-X10D1) on the side of the mounting base 42 detects the edge of the snap plate 130 and feeds back a "translation in place" signal, and the translation mechanism stops moving.

[0090] Then, after receiving the "translation into position" signal, the main controller starts the ball screw slide (model HIWINKK8610P-200A1-F0) of the lifting mechanism 2: the servo motor (power 400W) drives the screw to rotate, which drives the second lifting plate 23 to slide upward along the four second guide rods 22 (lifting stroke 80mm); when the height of the recovery joint 32 is consistent with the height of the black plastic joint of the copper pipe, the photoelectric sensor on the second lifting plate 23 triggers the "lifting into position" signal, the lifting mechanism 2 brake locks, and the recovery structure 43 completes the initial alignment with the copper pipe.

[0091] The main controller synchronously sends a "fixed" command to the first snap-fit ​​structure 33 and the second snap-fit ​​structure 34:

[0092] The first snap-fit ​​structure 33 (located below the recovery connector 32) is a double-acting cylinder (model number...).

[0093] The SC32×40 extends, pushing the movable locking block 332 toward the fixed locking block 332. The arc-shaped clamping surface (with fluororubber pad) of the double locking blocks 332 clamps the lower part of the copper tube, and the cylinder magnetic switch feedback "lower part fixed in place".

[0094] The second snap-fit ​​structure 34 (located on one side of the recovery connector 32) is a miniature cylinder (model number...).

[0095] The CDJ2B16×50-B drives the first lifting plate 342 to slide down along the first guide rod 341. The U-shaped groove (10mm opening width) of the clamping plate 343 is inserted into the upper part of the copper tube to achieve lateral limit. The magnetic switch feedback "upper limit in place".

[0096] After the main controller confirms that the "double fixing is in place", it controls the clamp cylinder on the side of the recovery connector 32 to act. The clamp locks the recovery connector 32 to the black plastic connector of the copper pipe. The nitrile rubber sealing ring inside the connector is deformed by pressure, and the sealing pressure is ≥1.5MPa to ensure that there is no helium leakage. The magnetic switch of the clamp cylinder gives feedback that the "docking is locked in place", and the detection and recovery stage begins.

[0097] The main controller starts the pressure detector 55 (model PT124G-1.6MPa, accuracy ±0.25% FS) of the detection assembly 5 to collect the pressure of the inert gas in the copper pipe in real time:

[0098] If the detected pressure is <1.0MPa (unqualified): the pressure detector 55 immediately sends a "pressure abnormality" signal to the main controller, the system triggers the red warning light to flash + the buzzer to alarm, the touch screen displays "the copper pipe pressure of the Xth group is unqualified" (X=1 / 2 / 3, corresponding to 3 groups of batch recovery), and the recovery action is not started, waiting for the operator to troubleshoot the fault (such as copper pipe leakage, insufficient helium charging);

[0099] If the detected pressure is ≥1.0MPa (qualified): the pressure detector 55 sends a "conducting" signal to the electromagnetic valve 54 (model 4V210-08), the electromagnetic valve 54 opens the recovery path, and at the same time the main controller starts the external helium recovery host and filtering device (including primary 10μm filter screen, precision 0.1μm filter element and 13X molecular sieve dryer).

[0100] The inert gas in the copper pipe flows into the recovery host through the recovery joint 32, the flow channel of the detection assembly 5, and the recovery interface 52, and is purified by the filtering device (the purity is improved to more than 99.9%) and then stored in the helium storage tank. During the recovery process, the pressure detector 55 continuously monitors the pipeline pressure, and when the pressure drops to below 0.05MPa (judging that the helium recovery is complete), it immediately sends a "recovery end" signal to the main controller, and the main controller controls the electromagnetic valve 54 to close and the recovery host to stop.

[0101] The main controller first controls the clamp cylinder to retract, releasing the locked state of the recovery joint 32 and the black plastic joint. Then the micro-cylinder of the second clamping structure 34 drives the first lifting plate 342 to rise (the U-shaped groove is separated from the copper pipe), and the double-acting cylinder of the first clamping structure 33 retracts (the double clamping block 332 is opened). Then the servo motor of the lifting mechanism 2 reverses, driving the second lifting plate 23 to descend to the initial position (lower limit of lifting stroke), and the rodless cylinder of the translation mechanism drives the mounting seat 42 to retract to the initial end of the guide rail 41 (lower limit of translation stroke).

[0102] After the recovery structure 43 is reset, the main controller controls the front-pushing cylinder and the downward-pushing cylinder to retract (the positioning pin is separated from the positioning hole of the bottom plate 110 of the placing rack 100), and the blocking cylinder is retracted. The conveying line is started again to transfer the placing rack 100 (containing the evaporator) that has completed helium recovery to the next process (such as evaporator assembly), and the next placing rack 100 loaded with the evaporator enters the recovery station, and the above steps are repeated to realize continuous helium recovery.

[0103] The foregoing is considered as illustrative only of the principles of the application. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the application to the exact construction and practice described. Accordingly, all such variations are intended to be included within the scope of the present application as defined in the following claims, along with full equivalents thereof. Unless otherwise indicated, the relative arrangement of components and steps in the embodiments set forth in the following examples are not limiting of the scope of the present application. Also, it is to be understood that the various parts shown in the figures are not necessarily drawn to scale. Techniques, methods, and apparatus known to those of ordinary skill in the art can not be discussed in detail, but are intended to be understood as a part of the technology of the present application when reading the description below. In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative of the examples and not as a limitation thereon. Thus, other examples of the exemplary embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the several views, and thus, once an item is defined in one figure, it is not necessary to discuss it further in connection with other figures where it is not referenced. In the description of the present application, it is to be understood that the specific structural and functional details disclosed herein are representative and do not limit the scope of the application, which is limited only by the claims. In this description, reference is made to methods and devices which are readily adaptable for use in connection with the application, and which are described in terms of their capability to accomplish the tasks identified. It will be apparent to those skilled in the art that substantial equivalents of the structures and methods described herein can be utilized without departing from the spirit and scope of the present application. Thus, it is intended that the present application cover all such modifications and variations of this application. It is intended that changes be made in the details and the like be within the scope of the application, with the scope of the application to be interpreted in accordance with the following claims.

[0104] Spatially relative terms, such as "beneath", "below", "lower", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device shown in the figures is inverted, elements described as "below" or "beneath" other elements or features would then be oriented "above" and "over" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. It is to be understood that the use of spatially relative terms does not indicate a fixed position in time and / or space.

[0105] In addition, it should be noted that the use of "first", "second", and the like words to define parts is merely for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application. The above is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. An inert gas automatic recovery equipment, comprising a rack, the rack is arranged on one side of a conveying line, the conveying line is used for conveying a heat exchanger, characterized in that: the inert gas automatic recovery equipment further comprises a recovery structure, the recovery structure comprises a first clamping structure, a recovery joint and a detection assembly; the recovery joint is used for being connected with the joint of the copper pipe of the heat exchanger, the first clamping structure is arranged on one side of the recovery joint and is used for fixing the copper pipe of the heat exchanger; the detection assembly is arranged close to the recovery joint and is used for controlling the on-off between the recovery joint and the joint of the copper pipe of the heat exchanger according to the detection result.

2. The inert gas automatic recovery equipment according to claim 1, characterized in that: the detection assembly comprises a detection main body, the detection main body is provided with a recovery interface and a butt joint interface which are communicated with each other, the recovery interface is connected with a recovery host, the butt joint interface is communicated with the recovery joint, a pressure detector and an electromagnetic valve are arranged between the butt joint interface and the recovery joint, and the pressure detector is electrically connected with the electromagnetic valve.

3. The inert gas automatic recovery equipment according to claim 2, characterized in that: a plurality of butt joint interfaces are arranged on the detection main body, and each butt joint interface is communicated with one recovery joint.

4. The inert gas automatic recovery equipment according to any one of claims 1-3, characterized in that: the recovery structure further comprises a mounting plate and a second clamping structure, the recovery joint and the second clamping structure are arranged on the mounting plate, the first clamping structure is arranged below the recovery joint, and the second clamping structure is arranged on one side of the recovery joint; the second clamping structure comprises a first guide rod, a first lifting plate and a clamping plate, the first guide rod is fixed on the mounting plate, the first lifting plate is slidably arranged on the first guide rod, the clamping plate is arranged on the first lifting plate, and a copper pipe clamping position is arranged on the clamping plate; a first lifting driving device is arranged on the mounting plate and is used for driving the first lifting plate to move along the axis direction of the first guide rod.

5. The inert gas automatic recovery equipment according to any one of claims 1-3, characterized in that: the first clamping structure comprises a clamp and an opening and closing driving device, the clamp comprises two oppositely arranged clamping blocks, the two clamping blocks are arranged below the recovery joint, a clamping position is formed between the two clamping blocks, and the opening and closing driving device drives the two clamping blocks to move close to or away from each other.

6. The inert gas automatic recovery equipment according to any one of claims 1-3, characterized in that: further comprising a translation mechanism and a lifting mechanism which are used for driving the recovery structure to move; the lifting mechanism comprises a second guide rod, a second lifting plate and a second lifting driving device; the second guide rod is fixed on the rack, the second lifting plate is slidably arranged on the second guide rod, the second lifting driving device is arranged on the rack, and the output end of the second lifting driving device is fixedly connected with the second lifting plate. The translation mechanism comprises a mounting seat and a translation driving device, a guide rail is arranged on the second lifting plate, the mounting seat is slidably arranged on the guide rail, and the translation driving device drives the mounting seat to slide on the guide rail; the mounting plate of the recovery structure is arranged on the mounting seat.

7. The automatic inert gas recovery equipment according to claim 6, wherein: The translation mechanism is arranged on the second lifting plate, and the mounting seat of each translation mechanism is provided with one recovery structure.

8. An inert gas recovery system characterized by: The inert gas automatic recovery equipment according to any one of claims 1-7 is arranged on one side of the conveying line.

9. The inert gas recovery system according to claim 8, wherein: The conveying line is provided with a placing rack for bearing the heat exchanger, the placing rack comprises a bottom plate, two opposite limiting plates are arranged on the bottom plate, a placing position for accommodating the heat exchanger is formed between the two limiting plates, and a clamping plate for clamping the copper pipe is arranged on any one of the limiting plates.

10. A method of recovering inert gas, characterized by: The inert gas recovery system is implemented based on the inert gas recovery system according to claim 8 or 9.

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