A liquid cooling back-suction device for air conditioning maintenance of an aircraft environmental control system

Abstract

This invention relates to a liquid-cooled recirculation device for the maintenance of aircraft air conditioning systems. It includes a boarding bridge, with the air conditioning unit detachably mounted below the boarding bridge via a connecting assembly. A refrigerant recovery assembly is installed between the four-way valve and the condenser of the air conditioning unit, allowing the compressor to recover refrigerant into the refrigerant recovery assembly when the air conditioning unit needs maintenance or disassembly. Three unit fixing mechanisms are provided, each including two longitudinal beams and a crossbeam connecting the two longitudinal beams. The crossbeams of the two side unit fixing mechanisms are slidably mounted below the mounting base, and the air conditioning unit is fixedly mounted on the lower ends of the two longitudinal beams. The connection position of the middle first unit fixing mechanism to the air conditioning unit corresponds to the center of gravity of the air conditioning unit, and the connection positions of the two side second unit fixing mechanisms to the air conditioning unit correspond to the two sides of the air conditioning unit, respectively. By adjusting the positions of the two side second unit fixing mechanisms, the overall torque balance of the air conditioning unit is achieved.

Description

Technical Field

[0001] This invention belongs to the field of aviation aircraft technology, specifically a liquid-cooled back-suction device for the maintenance of aviation environmental control air conditioning. Background Technology

[0002] Aircraft ground air conditioning units are devices that provide fresh air at a suitable temperature to the aircraft when its own engines are shut down. Due to the special nature of their application and usage scenarios, aircraft ground air conditioning units are all integrated structures, meaning that all components that perform the function are inside a single unit. They are classified into vehicle-mounted mobile types, floor-mounted fixed types, and hanging types according to their usage methods.

[0003] To address the refrigerant leakage issue during disassembly and maintenance of air conditioning units, a refrigerant recovery assembly is installed between the four-way valve and the condenser. This assembly allows the compressor to recover the refrigerant into the refrigerant recovery unit when the air conditioning unit needs to be repaired or disassembled, thereby increasing the refrigerant recovery ratio in the air conditioning unit's return flow and reducing refrigerant leakage during disassembly or maintenance.

[0004] For suspended aircraft ground air conditioning units, the air conditioning units need to be removed from the boarding bridge when dismantling or repairing them.

[0005] However, when installing existing aircraft ground air conditioning units, the units are fixed to the boarding bridge with bolts. The entire installation process requires equipment to suspend the air conditioning units, especially during the assembly of the bolts, which is time-consuming and labor-intensive. Furthermore, the installation position of the air conditioning units cannot be easily adjusted.

[0006] In addition, the existing suspended aircraft ground air conditioning units have room for improvement in ensuring the balance and stability of missile installation, and there is an imbalance in the stress on the various hoisting components.

[0007] Therefore, there is an urgent need for a liquid-cooled back-suction device for the maintenance of aviation environmental control air conditioning systems, which can solve the above problems. Summary of the Invention

[0008] To address the aforementioned issues, this invention proposes a liquid-cooled back-suction device for the maintenance of aviation environmental control air conditioning systems, comprising a boarding bridge, wherein the air conditioning unit is detachably installed below the boarding bridge via a connecting assembly.

[0009] A refrigerant recovery assembly is installed between the four-way valve and the condenser of the air conditioning unit, so that when the air conditioning unit needs to be repaired or disassembled, the compressor can be used to recover the refrigerant into the refrigerant recovery assembly.

[0010] The connection assembly includes a mounting base and a unit fixing mechanism. The mounting base is installed on the lower end face of the boarding bridge, and the unit fixing mechanism is installed below the mounting base for installing the air conditioning unit.

[0011] There are three unit fixing mechanisms, and each unit fixing mechanism includes two longitudinal beams and a crossbeam connecting the two longitudinal beams. The crossbeams of the unit fixing mechanisms on both sides are slidably installed below the mounting base, and the air conditioning unit is fixedly installed at the lower end of the two longitudinal beams.

[0012] The connection position of the first unit fixing mechanism in the middle with the air conditioning unit corresponds to the center of gravity of the air conditioning unit, and the connection positions of the second unit fixing mechanisms on both sides correspond to the two sides of the air conditioning unit. By adjusting the position of the second unit fixing mechanisms on both sides, the air conditioning unit as a whole can achieve torque balance.

[0013] Furthermore, the mounting base is provided with rails on both sides that are fixedly installed on the lower end of the boarding bridge, and the rails are provided with circular rail grooves.

[0014] A slider is fixedly installed on the upper end face of the crossbeam, and the shape and size of the slider are the same as those of the track groove.

[0015] Furthermore, the lower end face of the mounting base is provided with several snap-fit ​​teeth, and the upper end face of the crossbeam is fixedly installed with mounting teeth, and the shape and size of the mounting teeth match the snap-fit ​​teeth.

[0016] The portion of the snap-fit ​​teeth is configured to extend resiliently and telescopically beyond the lower end face of the mounting base or retract into the lower end face of the mounting base;

[0017] When the air conditioning unit is installed, some of the locking teeth are in a first elastic state, while the rest of the locking teeth are in a rigid state; when the air conditioning unit is disassembled, some of the locking teeth are in a second elastic state.

[0018] Furthermore, the locking teeth are triangular teeth, including a small bevel and a large bevel, with the inclination angle of the small bevel being smaller than that of the large bevel;

[0019] Furthermore, when installing an air conditioning unit, the smaller inclined surface is the stress-bearing surface; when disassembling an air conditioning unit, the larger inclined surface is the stress-bearing surface.

[0020] The elastic modulus of the snap-fit ​​teeth in the second elastic state is less than that of the snap-fit ​​teeth in the first elastic state.

[0021] Furthermore, the lower end face of the mounting base is provided with a mounting groove, and several snap-fit ​​teeth can be elastically and telescopically installed in the mounting groove, and a first spring is provided in the mounting groove;

[0022] The mounting slot also contains a sliding extrusion plate. The upper end of the first spring is fixedly connected to the lower end face of the extrusion plate, and the lower end of the first spring is fixedly connected to the upper end face of the locking teeth.

[0023] Furthermore, when the air conditioning unit is installed, the extrusion plate is in a low position, and several locking teeth are in the first elastic state.

[0024] When the air conditioning unit is disassembled, the pressing plate is in a high position and several locking teeth are in a second elastic state.

[0025] Furthermore, the right side of the extrusion plate is configured as a wedge surface, the right side of the mounting base is provided with a positioning block, and the left side of the positioning block is also configured as a wedge surface;

[0026] A positioning hole is also provided on the right side of the mounting base. The positioning block can be slidably inserted into the positioning hole and can be fixed to the mounting base by bolts.

[0027] Furthermore, when the air conditioning unit is installed, the positioning block is in the installation state, the pressing plate is in the low position, and several locking teeth are in the first elastic state.

[0028] When the air conditioning unit is disassembled, the positioning block is in the disassembly state, the pressing plate is in the high position, and several locking teeth are in the second elastic state.

[0029] Furthermore, the lower end of the boarding bridge is equipped with a mounting bracket adjustment unit, which is connected to the lower end of the mounting brackets on both sides.

[0030] Furthermore, a first oblong hole is provided on the lower end of the boarding bridge, and a second oblong hole is provided on the mounting base. Threaded fasteners are used to fix the mounting base and the boarding bridge together through the first oblong hole and the second oblong hole.

[0031] Furthermore, the active adjustment assembly includes a double-threaded screw and a first nut block and a second nut block threadedly connected to the double-threaded screw;

[0032] The two ends of the double-threaded screw are mounted on support bearings, and the support bearings are fixedly mounted on the lower end of the boarding bridge.

[0033] The two ends of the double-threaded screw are respectively provided with a first threaded section and a second threaded section, and the thread directions of the first threaded section and the second threaded section are opposite.

[0034] The first nut block is provided with an internal thread that matches the first threaded section, and the second nut block is provided with an internal thread that matches the second threaded section. The upper ends of both the first nut block and the second nut block are connected to the lower end of the mounting base.

[0035] Furthermore, the mounting base adjustment unit also includes a measuring component, which is located above the mounting base. The measuring component includes a measuring body fixedly installed on the boarding bridge, the measuring body is provided with a scale, and the measuring body is provided with a movable stop block inside.

[0036] The stop block can slide a preset distance according to the scale and stop at the preset scale. The stop block extends downward out of the measuring body and extends to the side of the mounting base.

[0037] Furthermore, the stop blocks are configured in two pairs: one pair of inner stop blocks and one pair of outer stop blocks.

[0038] Among them, a pair of inner stop blocks are set near the center of the measuring body, and a pair of outer stop blocks are set near both ends of the measuring body.

[0039] Furthermore, the upper surface of the measuring body is provided with a scale, and an adjustment groove is provided inside the measuring body;

[0040] The stop block includes a slider body, and an operating block is provided on the upper end surface of the slider body. The operating block extends from the adjustment groove out of the upper end surface of the measuring body, and the operating block corresponds to the scale.

[0041] A stop block is provided on the lower end face of the slider body, and the stop block extends from the adjustment groove out of the lower end face of the measuring body and extends to the side of the mounting base.

[0042] Furthermore, the upper end face of the measuring body is provided with threaded holes, and there are four threaded holes, the positions of which are adapted to the range of motion of the four stop blocks, and tightening bolts are installed in the threaded holes.

[0043] Furthermore, the scale includes large and small scales, with the large scale in millimeters and the small scale having ten divisions.

[0044] Furthermore, both the first nut block and the second nut block are in contact with the mounting base, and in one state, both the first nut block and the second nut block are fixed relative to the mounting base.

[0045] In another state, both the first nut block and the second nut block move relative to the mounting base.

[0046] Furthermore, both the first nut block and the second nut block have a moving groove at their upper ends, and a moving plate that can move up and down is provided in the moving groove.

[0047] A pushing tooth is fixedly installed on the upper end of the movable plate, and a second spring is also provided in the movable groove. The upper and lower ends of the second spring are fixedly connected to the lower end face of the movable plate and the bottom face of the movable groove, respectively.

[0048] The bottom of the mounting bases on both sides has grooves with more than the pushing teeth, and the shape and size of the grooves are the same as those of the pushing teeth.

[0049] The advantages of this invention are:

[0050] 1. The connection position of the middle unit fixing mechanism to the air conditioning unit corresponds to the center of gravity of the air conditioning unit, and the connection positions of the unit fixing mechanisms on both sides correspond to the two sides of the air conditioning unit, respectively. By adjusting the position of the unit fixing mechanisms on both sides, the overall torque balance of the air conditioning unit is achieved, improving the balance, stability, and parallelism of the air conditioning unit installation, balancing the force on each unit fixing mechanism, and extending the service life of the unit fixing mechanisms. Simultaneously, the sliding installation of the unit fixing mechanisms on both sides allows for adjustment of their installation position, enabling the liquid-cooled back-suction device for aviation environmental control air conditioning maintenance in this embodiment to be compatible with different models of air conditioning units.

[0051] 2. The air conditioning unit is installed on the mounting base by sliding, eliminating the need for external force to continuously suspend the unit, saving time and effort. Furthermore, the air conditioning unit will automatically stop when it reaches the designated installation position, further saving time and effort and making the installation position more precise.

[0052] 3. By switching between two elastic states of the locking teeth, and with the addition of small and large bevels on the teeth, the installation of the air conditioning unit is time-saving and labor-saving. It automatically stops at the designated installation position with precision; furthermore, the air conditioning unit cannot retract after being in the installation position, further ensuring the stability of the installation. When disassembling the air conditioning unit, simply adjust some of the locking teeth to the second elastic state, making disassembly convenient and time-saving.

[0053] 4. The mounting positions of the two side mounting bases can be adjusted simultaneously. The active adjustment unit moves the two mounting bases closer to or further apart, resulting in high adjustment efficiency. Combined with the measuring component, the position of the mounting bases can be quantitatively adjusted, avoiding errors and greatly improving the accuracy of the mounting base position adjustment. Simultaneously, it solves the problem of asynchronous positioning of the two side mounting base adjustment units.

[0054] 5. A pair of inner stop blocks are positioned near the center of the measuring body so that both mounting seats on either side can press against the stop blocks when they move closer together; a pair of outer stop blocks are positioned near both ends of the measuring body so that both mounting seats on either side can press against the stop blocks when they move further apart. This adjustment method, which allows for moving the mounting seats closer together or further apart, enables a simpler and more efficient adjustment of the mounting seat positions. Attached Figure Description

[0055] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0056] Figure 1This is a structural diagram of a liquid-cooled re-suction device used for the maintenance of aviation environmental control air conditioning systems.

[0057] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle;

[0058] Figure 3 This is a diagram of the unit's fixed structure.

[0059] Figure 4 for Figure 3 Enlarged view of a section at point B in the middle;

[0060] Figure 5 A bottom view of the boarding bridge;

[0061] Figure 6 for Figure 5 Enlarged view of a section at point C;

[0062] Figure 7 for Figure 5 Enlarged view of a section at point D;

[0063] Figure 8 This is a sectional view of the mounting base;

[0064] Figure 9 Here is a structural diagram of the mounting bracket adjustment unit;

[0065] Figure 10 For measuring component structure diagram;

[0066] Figure 11 for Figure 10 Enlarged view of a section at point E in the middle;

[0067] Figure 12 Exploded view of the measured component;

[0068] Figure 13 Partial sectional view of the first or second nut block.

[0069] In the diagram, the components are: boarding bridge 100, air conditioning unit 200, connecting assembly 300, mounting base 400, second oblong hole 401, toothed groove 402, track 410, track groove 411, snap-fit ​​tooth 420, small inclined surface 421, large inclined surface 422, mounting groove 430, first spring 440, extrusion plate 450, positioning block 460, positioning hole 470, bolt 480, unit fixing mechanism 500, longitudinal beam 510, crossbeam 520, slider 521, mounting tooth 522, mounting base adjustment unit 600, active adjustment assembly 610, and double screw. 611 threaded screw, 612 first nut block, 613 second nut block, 614 first threaded section, 615 second threaded section, 616 support bearing, 617 moving groove, 618 moving plate, 619 pushing tooth, 6110 second spring, 620 measuring component, 621 measuring body, 622 stop block, 623 inner stop block, 624 outer stop block, 625 adjusting groove, 626 slider body, 627 operating block, 628 stop block, 629 threaded hole, 6210 tightening bolt, 6211 large scale, 6212 small scale. Detailed Implementation

[0070] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0071] like Figure 1-13 As shown, this embodiment provides a liquid-cooled back-suction device for the maintenance of aircraft environmental control air conditioning, including a boarding bridge 100, and an air conditioning unit 200 is detachably installed below the boarding bridge 100 via a connecting assembly 300.

[0072] Understandably, the air conditioning unit 200 is detachably installed to the boarding bridge 100 via the connecting assembly 300, allowing for easy removal during maintenance. Furthermore, to address refrigerant leakage during disassembly and maintenance, a refrigerant recovery assembly is installed between the four-way valve and the condenser. This allows the compressor to recover refrigerant into the refrigerant recovery assembly when maintenance or disassembly is required, increasing the refrigerant recovery rate in the air conditioning unit 200's return flow and reducing refrigerant leakage during disassembly or maintenance.

[0073] In this embodiment, the connection assembly 300 includes a mounting base 400 and a unit fixing mechanism 500. The mounting base 400 is installed on the lower end face of the boarding bridge 100, and the unit fixing mechanism 500 is installed below the mounting base 400 for installing the air conditioning unit 200.

[0074] The unit fixing mechanism 500 is provided in three parts, and the unit fixing mechanism 500 includes two longitudinal beams 510 and a crossbeam 520 connected between the two longitudinal beams 510. The crossbeams 520 of the unit fixing mechanisms 500 on both sides are slidably installed below the mounting base 400. The air conditioning unit 200 is fixedly installed at the lower end of the two longitudinal beams 510.

[0075] It is worth noting that there are three unit fixing mechanisms 500. The connection position of the first unit fixing mechanism 500 in the middle with the air conditioning unit 200 corresponds to the center of gravity of the air conditioning unit 200. The connection positions of the second unit fixing mechanisms 500 on both sides with the air conditioning unit 200 correspond to the two sides of the air conditioning unit 200, respectively. By adjusting the position of the second unit fixing mechanisms 500 on both sides, the air conditioning unit 200 as a whole achieves torque balance, which improves the balance, stability and parallelism of the air conditioning unit 200 installation, balances the force on each unit fixing mechanism 500, and improves the service life of the unit fixing mechanism 500.

[0076] Meanwhile, the second unit fixing mechanism 500 on both sides is slidably installed, which can adjust the installation position of the unit fixing mechanism 500, so that the liquid cooling back suction device for maintenance of aviation environmental control air conditioning in this embodiment can be adapted to different models of air conditioning unit 200.

[0077] Understandably, when the traditional unit fixing mechanism 500 is installed, it is fixed to the mounting base 400 with bolts. During the entire installation process, the unit fixing mechanism 500 needs to be suspended by equipment. In particular, the process of assembling each bolt is time-consuming and labor-intensive. Furthermore, the installation position of the unit fixing mechanism 500 cannot be easily adjusted.

[0078] Therefore, in this embodiment, the mounting base 400 is provided with rails 410 fixedly installed on the lower end face of the boarding bridge 100 on both sides, and the rails 410 are provided with circular rail grooves 411; correspondingly, the upper end face of the crossbeam 520 is fixedly installed with a slider 521, and the shape and size of the slider 521 are the same as those of the rail groove 411.

[0079] Therefore, during the installation of the air conditioning unit 200, it is only necessary to align the slider 521 with the track groove 411 and then push the air conditioning unit 200 in from one side to achieve the initial installation with the mounting base 400. It is not necessary to suspend the air conditioning unit 200 throughout the entire installation process, saving time and effort. At the same time, the circular track groove 411 restricts the vertical and horizontal, as well as the forward and backward freedom of the air conditioning unit 200.

[0080] In this embodiment, the lower end face of the mounting base 400 is provided with a plurality of snap-fit ​​teeth 420, and the upper end face of the crossbeam 520 is fixedly mounted with mounting teeth 522, and the shape and size of the mounting teeth 522 match the snap-fit ​​teeth 420; a portion of the snap-fit ​​teeth 420 is configured to extend elastically out of the lower end face of the mounting base 400 or retract into the lower end face of the mounting base 400.

[0081] When the air conditioning unit 200 is installed, some of the locking teeth 420 are in a first elastic state, and the rest of the locking teeth 420 are in a rigid state; when the air conditioning unit 200 is disassembled, some of the locking teeth 420 are in a second elastic state.

[0082] Therefore, during installation, under the combined action of the track groove 411 and the slider 521, when the air conditioning unit 200 is pushed in from left to right, the locking teeth 420 in the first elastic state retracts to the lower end face of the mounting base 400 under the squeezing action of the mounting teeth 522, and the air conditioning unit 200 can slide from left to right; when the air conditioning unit 200 slides to the point where the mounting teeth 522 contact the locking teeth 420 in the rigid state, the locking teeth 420 in the rigid state will not retract to the lower end face of the mounting base 400, so the air conditioning unit 200 can no longer slide when it reaches this position, and at this time, the air conditioning unit 200 is stopped from being pushed further.

[0083] With the above settings, the air conditioning unit 200 is installed on the mounting base 400 by sliding, without the need for external force to keep the air conditioning unit 200 suspended, saving time and effort; in addition, the air conditioning unit 200 will automatically stop when it reaches the designated installation position, further saving time and effort and making the installation position more precise.

[0084] Specifically, the snap-fit ​​tooth 420 is a triangular tooth, including a small inclined surface 421 and a large inclined surface 422. The inclination angle of the small inclined surface 421 is smaller than that of the large inclined surface 422. Furthermore, when the air conditioning unit 200 is installed, the small inclined surface 421 is the force-bearing surface; when the air conditioning unit 200 is disassembled, the large inclined surface 422 is the force-bearing surface.

[0085] The elastic modulus of the snap-fit ​​tooth 420 in the second elastic state is less than that of the snap-fit ​​tooth 420 in the first elastic state.

[0086] Therefore, under the same elastic conditions, when the air conditioning unit 200 is disassembled, the large inclined surface 422 of the locking tooth 420 is the force-bearing surface, making it relatively more difficult to retract. Thus, the elastic modulus of the locking tooth 420 in the second elastic state is adjusted to a smaller state, making it relatively easier for the locking tooth 420 to retract when the air conditioning unit 200 is disassembled.

[0087] By switching between two elastic states of the locking teeth 420, and with the small and large inclined surfaces 421 and 422 of the locking teeth 420, the installation process of the air conditioning unit 200 is time-saving and labor-saving. It can automatically stop when it reaches the designated installation position, and the stopping position is precise. Furthermore, the air conditioning unit 200 cannot retract after being in the installation position, further ensuring the stability of the air conditioning unit 200 installation. When disassembling the air conditioning unit 200, simply adjust some of the locking teeth 420 to the second elastic state, making disassembly convenient and time-saving.

[0088] In this embodiment, the lower end face of the mounting base 400 is also provided with a mounting groove 430, and a plurality of snap-fit ​​teeth 420 can be elastically and telescopically installed in the mounting groove 430, and a first spring 440 is provided in the mounting groove 430.

[0089] The mounting groove 430 is also equipped with a sliding extrusion plate 450. The upper end of the first spring 440 is fixedly connected to the lower end face of the extrusion plate 450, and the lower end of the first spring 440 is fixedly connected to the upper end face of the snap-fit ​​tooth 420.

[0090] Therefore, when the air conditioning unit 200 is installed, the pressing plate 450 is in a low position and several locking teeth 420 are in a first elastic state; when the air conditioning unit 200 is disassembled, the pressing plate 450 is in a high position and several locking teeth 420 are in a second elastic state.

[0091] Specifically, the right side of the extrusion plate 450 is configured as a wedge surface, the right side of the mounting base 400 is provided with a positioning block 460, and the left side of the positioning block 460 is also configured as a wedge surface; the right side of the mounting base 400 is also provided with a positioning hole 470, the positioning block 460 can be slidably inserted into the positioning hole 470, and can be fixed to the mounting base 400 by bolts 480.

[0092] Therefore, when the air conditioning unit 200 is installed, the positioning block 460 is in the installation state, the pressing plate 450 is in the low position, and the several locking teeth 420 are in the first elastic state; when the air conditioning unit 200 is disassembled, the positioning block 460 is in the disassembly state, the pressing plate 450 is in the high position, and the several locking teeth 420 are in the second elastic state.

[0093] In this embodiment, a mounting base adjustment unit 600 is provided on the lower end face of the boarding bridge 100, and the mounting base adjustment unit 600 is connected to the mounting bases 400 on both sides. Thus, the mounting bases 400 can be moved laterally relative to the boarding bridge 100 by the mounting base adjustment unit 600, thereby changing the position of the unit fixing mechanisms 500 on both sides. Finally, by adjusting the position of the second unit fixing mechanisms 500 on both sides, the air conditioning unit 200 as a whole achieves torque balance. Furthermore, it can adapt to different models of air conditioning units 200.

[0094] In this embodiment, the mounting base adjustment unit 600 includes an active adjustment assembly 610 that is pulsatorically connected to the mounting base 400, thereby driving the mounting base 400 to move. Specifically, the lower end of the mounting base 400 is connected to the active adjustment assembly 610 to realize the movement of the mounting base 400. A first oblong hole is provided on the lower end of the boarding bridge 100, and a second oblong hole 401 is provided on the mounting base 400. Threaded fasteners fix the mounting base 400 and the boarding bridge 100 together through the first oblong hole and the second oblong hole 401.

[0095] Understandably, when the position of the mounting base 400 needs to be adjusted, the threaded fasteners are loosened slightly, the active adjustment assembly 610 moves the mounting base 400, and after the position is adjusted, the threaded fasteners are tightened to fix the mounting base 400 and the boarding bridge 100 together.

[0096] It is worth noting that, depending on the needs of different air conditioning units 200, when changing the position of the mounting brackets 400 on both sides, it is only necessary to adjust the position of the mounting brackets 400 on both sides before hoisting the air conditioning unit 200, which is convenient and labor-saving.

[0097] The liquid-cooled back-suction device for maintenance of aviation environmental control air conditioning in this embodiment can have its mounting positions on both sides of the mounting base 400 adjusted simultaneously. The active adjustment group 610 drives the mounting bases on both sides of the mounting base 400 to move closer or further apart, resulting in high adjustment efficiency.

[0098] Specifically, the active adjustment assembly 610 includes a double-threaded screw 611 and a first nut block 612 and a second nut block 613 threadedly connected to the double-threaded screw 611. Both ends of the double-threaded screw 611 are mounted on a support bearing 616, and the support bearing 616 is fixedly mounted on the lower end of the boarding bridge 100 so that the double-threaded screw 611 has only one degree of rotational freedom.

[0099] The double-threaded screw 611 has a first threaded section 614 and a second threaded section 615 at its two ends, and the threads of the first threaded section 614 and the second threaded section 615 are opposite in direction; the first nut block 612 is provided with an internal thread that matches the first threaded section 614, and the second nut block 613 is provided with an internal thread that matches the second threaded section 615, and the upper ends of the first nut block 612 and the second nut block 613 are both connected to the lower end of the mounting base 400.

[0100] Therefore, when adjusting the position of the mounting base 400, rotating the double threaded screw 611 causes the first nut block 612 and the second nut block 613 to move closer or further apart, which in turn causes the two mounting bases 400 on both sides to move closer or further apart, greatly improving the adjustment efficiency.

[0101] The liquid cooling back suction device for maintenance of aviation environmental control air conditioning in this embodiment also includes a measuring component 620 in the mounting base adjustment unit 600, thereby quantitatively adjusting the position of the mounting base 400, avoiding errors, and greatly improving the accuracy of the position adjustment of the mounting base 400.

[0102] Specifically, the measuring component 620 is located above the mounting base 400, and includes a measuring body 621 fixedly installed on the boarding bridge 100. The measuring body 621 is provided with a scale, and a movable stop block 622 is provided inside the measuring body 621.

[0103] The stop block 622 can slide a preset distance according to the scale and stop at the preset scale. The stop block 622 extends downward out of the measuring body 621 and extends to the side of the mounting base 400.

[0104] Therefore, when adjusting the position of the mounting base 400, the stop block 622 is first slidable a preset distance and stopped at a preset mark. Then, the double-threaded screw 611 is rotated, causing the mounting bases 400 on both sides to move closer or further apart. When the mounting base 400 presses against the stop block 622, the rotation of the double-threaded screw 611 is stopped, causing the mounting base 400 to stop at the preset position. This allows for precise adjustment of the positions of the mounting bases 400 on both sides, avoiding errors and greatly improving the accuracy of the position adjustment.

[0105] Understandably, the stop blocks 622 are configured as a pair so that the two mounting seats 400 on both sides can press against the stop blocks 622 when they are close to or far apart.

[0106] In this embodiment, the stop blocks 622 are configured in two pairs: an inner stop block 623 and an outer stop block 624. The inner stop blocks 623 are located near the center of the measuring body 621 so that when the mounting seats 400 on both sides approach each other, they can press against the stop blocks 622. The outer stop blocks 624 are located near both ends of the measuring body 621 so that when the mounting seats 400 on both sides move away from each other, they can press against the stop blocks 622.

[0107] With this setting, combined with the adjustment method of moving the mounting bases 400 on both sides closer or further apart, the position of the mounting bases 400 on both sides can be adjusted more simply and efficiently.

[0108] Specifically, the upper surface of the measuring body 621 is provided with a scale, and an adjustment groove 625 is provided inside the measuring body 621; the stop block 622 includes a slider body 626, and an operation block 627 is provided on the upper surface of the slider body 626. The operation block 627 extends from the adjustment groove 625 out of the upper surface of the measuring body 621 so that the stop block 622 can be moved conveniently through the operation block 627. The operation block 627 corresponds to the scale so as to quantitatively adjust the distance of movement of the stop block 622.

[0109] A stop block 628 is provided on the lower end face of the slider body 626, and the stop block 628 extends from the adjustment groove 625 out of the lower end face of the measuring body 621 and extends to the side of the mounting base 400 so that when the position of the mounting base 400 is adjusted, the side of the mounting base 400 presses against the stop block 628 to stop the adjustment.

[0110] The upper end face of the measuring body 621 is also provided with threaded holes 629, and there are four threaded holes 629. Their positions are respectively adapted to the range of motion of the four stop blocks 622. A tightening bolt 6210 is provided in the threaded hole 629 so that when the stop block 622 moves to the target position, the tightening bolt 6210 is tightened to hold the slider body 626, so that the stop block 622 cannot move.

[0111] In this embodiment, the scale includes a large scale 6211 and a small scale 6212. The large scale 6211 is in millimeters, and the small scale 6212 is configured with ten divisions. Through the cooperation of the large scale 6211 and the small scale 6212, the configuration of the moving distance of the stop block 622 can be accurate to 0.1mm, which further improves the moving accuracy of the stop block 622.

[0112] Understandably, when adjusting the position of the mounting base 400, the stop block 622 is first slid to a preset distance and stops at a preset mark. Then, the double-threaded screw 611 is rotated, causing the mounting bases 400 on both sides to move closer or further apart. When the mounting base 400 presses against the stop block 622, the rotation of the double-threaded screw 611 is stopped, so that the mounting base 400 stops at the preset position.

[0113] However, in some cases, it is not possible to allocate the same distance between the two mounting bases 400. In this case, after the mounting base 400 with a relatively smaller moving distance moves into place, the mounting base 400 with a relatively larger moving distance still needs to move. However, because the mounting base 400 with a relatively smaller moving distance is blocked by the stop block 622, the mounting base 400 with a relatively larger moving distance cannot continue to move.

[0114] To eliminate the above problems, in the liquid cooling back suction device for maintenance of aviation environmental control air conditioning in this embodiment, the first nut block 612 and the second nut block 613 are both in contact with the mounting base 400. In one state, the first nut block 612 and the second nut block 613 are both fixed relative to the mounting base 400; in another state, the first nut block 612 and the second nut block 613 are both movable relative to the mounting base 400.

[0115] Therefore, in one state, when the mounting base 400 has not yet pressed against the stop block 622, the first nut block 612 or the second nut block 613 can drive the mounting base 400 to move; in another state, when the mounting base 400 has already pressed against the stop block 622, the first nut block 612 or the second nut block 613 cannot drive the mounting base 400 to move.

[0116] With the above settings, after the mounting base 400 is pressed against the stop block 622 and moves into place, the first nut block 612 or the second nut block 613 cannot move the mounting base 400. Although the first nut block 612 or the second nut block 613 continues to move, the position of the mounting base 400 no longer changes, thus realizing the automatic stop adjustment function of the mounting base adjustment unit 600. In this way, the problem of the mounting base adjustment units 600 on both sides not reaching the position synchronously is solved.

[0117] Specifically, the upper ends of the first nut block 612 and the second nut block 613 are both provided with a moving groove 617. A moving plate 618 that can move up and down is provided in the moving groove 617. A pushing tooth 619 is fixedly installed on the upper end of the moving plate 618. A second spring 6110 is also provided in the moving groove 617. The upper and lower ends of the second spring 6110 are respectively fixedly connected to the lower end face of the moving plate 618 and the bottom surface of the moving groove 617. The bottom of the mounting bases 400 on both sides is provided with a tooth groove 402 with more than the pushing tooth 619. The shape and size of the tooth groove 402 are the same as those of the pushing tooth 619.

[0118] Therefore, before the mounting base 400 presses against the stop block 622, the second spring 6110 pushes the tooth 619 to remain extended, allowing the first nut block 612 or the second nut block 613 to move the mounting base 400. Once the mounting base 400 has pressed against the stop block 622, the pressing action of the tooth groove 402 overcomes the elastic force of the second spring 6110, causing the tooth 619 to continuously retract into the moving groove 617, moving from one tooth groove 402 to the next adjacent tooth groove 402. The first nut block 612 or the second nut block 613 can no longer move the mounting base 400.

[0119] With the above settings, the mounting base 400 can be moved into place and then automatically stop, thus solving the problem of the mounting bases 400 on both sides not being able to enter the position synchronously.

[0120] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A liquid-cooled back-suction device for maintenance of aircraft environmental control air conditioning, comprising a boarding bridge, wherein the air conditioning unit is detachably installed below the boarding bridge via a connecting assembly; A refrigerant recovery assembly is installed between the four-way valve and the condenser of the air conditioning unit, so that when the air conditioning unit needs to be repaired or disassembled, the compressor can be used to recover the refrigerant into the refrigerant recovery assembly. The connection assembly includes a mounting base and a unit fixing mechanism. The mounting base is installed on the lower end face of the boarding bridge, and the unit fixing mechanism is installed below the mounting base for installing the air conditioning unit. Its features are, There are three unit fixing mechanisms, and each unit fixing mechanism includes two longitudinal beams and a crossbeam connecting the two longitudinal beams. The crossbeams of the unit fixing mechanisms on both sides are slidably installed below the mounting base, and the air conditioning unit is fixedly installed at the lower end of the two longitudinal beams. The connection position of the first unit fixing mechanism in the middle with the air conditioning unit corresponds to the center of gravity of the air conditioning unit, and the connection positions of the second unit fixing mechanisms on both sides correspond to the two sides of the air conditioning unit. By adjusting the position of the second unit fixing mechanisms on both sides, the air conditioning unit as a whole can achieve torque balance. The mounting base has rails on both sides that are fixedly installed on the lower end of the boarding bridge, and the rails have circular grooves. A slider is fixedly installed on the upper end face of the crossbeam, and the shape and size of the slider are the same as those of the track groove. The lower end face of the mounting base is provided with several snap-fit ​​teeth, and the upper end face of the crossbeam is fixedly installed with mounting teeth, and the shape and size of the mounting teeth match the snap-fit ​​teeth. The portion of the snap-fit ​​teeth is configured to extend resiliently and telescopically beyond the lower end face of the mounting base or retract into the lower end face of the mounting base; When the air conditioning unit is installed, some of the snap-fit ​​teeth are in a first elastic state, while the remaining parts of the snap-fit ​​teeth are in a rigid state; when the air conditioning unit is disassembled, some of the snap-fit ​​teeth are in a second elastic state. The locking teeth are triangular teeth, including a small bevel and a large bevel, with the inclination angle of the small bevel being smaller than that of the large bevel; Furthermore, when installing an air conditioning unit, the smaller inclined surface is the stress-bearing surface; when disassembling an air conditioning unit, the larger inclined surface is the stress-bearing surface. The elastic modulus of the snap-fit ​​teeth in the second elastic state is less than that of the snap-fit ​​teeth in the first elastic state.

2. The liquid-cooled back-suction device for maintenance of aviation environmental control air conditioning according to claim 1, characterized in that, The lower end face of the mounting base is also provided with a mounting groove, and several snap-fit ​​teeth can be elastically and telescopically installed in the mounting groove, and a first spring is provided in the mounting groove; The mounting slot also contains a sliding extrusion plate. The upper end of the first spring is fixedly connected to the lower end face of the extrusion plate, and the lower end of the first spring is fixedly connected to the upper end face of the locking teeth.

3. The liquid-cooled recirculation device for maintenance of aviation environmental control air conditioning according to claim 2, characterized in that, When the air conditioning unit is installed, the extrusion plate is in a low position and several locking teeth are in the first elastic state. When the air conditioning unit is disassembled, the pressing plate is in a high position and several locking teeth are in a second elastic state.

4. The liquid-cooled back-suction device for maintenance of aviation environmental control air conditioning according to claim 2 or 3, characterized in that, The right side of the extrusion plate is configured as a wedge surface, and a positioning block is provided on the right side of the mounting base, and the left side of the positioning block is also configured as a wedge surface. A positioning hole is also provided on the right side of the mounting base. The positioning block can be slidably inserted into the positioning hole and can be fixed to the mounting base by bolts.

5. The liquid-cooled back-suction device for maintenance of aviation environmental control air conditioning according to claim 4, characterized in that, When the air conditioning unit is installed, the positioning block is in the installation state, the pressing plate is in the low position, and several locking teeth are in the first elastic state. When the air conditioning unit is disassembled, the positioning block is in the disassembly state, the pressing plate is in the high position, and several locking teeth are in the second elastic state.

6. The liquid-cooled recirculation device for maintenance of aviation environmental control air conditioning according to claim 1, characterized in that, The lower end of the boarding bridge is equipped with a mounting base adjustment unit, which is connected to the lower end of the mounting bases on both sides.

7. The liquid-cooled back-suction device for maintenance of aviation environmental control air conditioning according to claim 6, characterized in that, The lower end of the boarding bridge has a first oblong hole, and the mounting base has a second oblong hole. Threaded fasteners are used to fix the mounting base and the boarding bridge together through the first oblong hole and the second oblong hole.

Images