Fault detection device for air conditioner maintenance

Abstract

The present invention relates to the field of maintenance and detection technology, and discloses a fault detection device for air conditioner maintenance, comprising a base, a main body installed on the top of the base, the main body consisting of an observation tube and side tubes movably sleeved on the left and right ends of the observation tube and a retractable part installed in the side tube, a cleaning component and a water supply component are respectively installed on the top and bottom of the observation tube, a transmission component for driving the observation tube to rotate is installed on the inner side of the base, and an opening and closing component capable of being inserted into the inner cavity of the observation tube is provided on the left and right peripheries of the base and the side tubes, and a pressure regulating component for adjusting the air pressure of the retractable part is installed on the front side of the base; the rotating first spring continuously wipes and cleans the wetted condenser tube surface to remove dirt attached to the condenser tube surface, providing a good test environment for subsequent bubble method leakage detection, a sealed detection cavity is formed between the inner air ring and the isolation tube, and water is then injected into the detection cavity to observe the bubble state on the condenser tube surface and determine the leakage point.

Description

Technical Field

[0001] The present invention relates to the technical field of maintenance and detection, and more particularly to a fault detection device for air conditioner maintenance. Background Art

[0002] Leakage of the air conditioner condenser is a common problem. In order to accurately determine the leakage location and facilitate maintenance personnel to repair the leakage of the condenser in time, the existing Chinese invention patent with announcement number CN116878758B discloses a fault detection device for air conditioner maintenance, including two end tubes, a transparent tube fixedly installed between the two end tubes, annular air bags fixedly installed at both ends of the inner wall of the transparent tube, and a connecting tube fixedly installed between the two annular air bags; the two annular air bags are inflated by the air pump and the connecting tube, so that the annular air bags expand and press against the outside of the condenser, so that a closed detection cavity is formed between the transparent tube and the annular air bags. At this time, the water pump and the fixed tube pump water in the water tank into the detection cavity and inject gas into the condenser. When there is a leak on the condenser, the leaked gas will generate bubbles in the water in the detection cavity, so that the detection personnel can observe the leakage point of the condenser through the transparent tube, facilitate the investigation and detection of the leakage point of the condenser, and facilitate the maintenance personnel to repair the leakage of the condenser.

[0003] After a long period of use, dirt easily adheres to the surface of the condenser. The accumulation of this dirt will have a certain impact on the measurement process. If the dirt is not cleaned in time before measurement, it will affect our accurate judgment of the clarity of the water in the detection cavity; specifically, when there is too much dirt on the surface of the condenser, it will make the water that should have been clear and transparent become turbid. This turbidity will not only affect our judgment of the location of bubble generation, but also make the recycling and reuse of the water more difficult.

[0004] Therefore, the present invention proposes a fault detection device for air conditioner maintenance to achieve automatic cleaning of the condenser before measurement, improve the accuracy of determining the location of bubble generation, and increase the cycle of water recovery and recycling. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a fault detection device for air conditioner maintenance to solve the problems existing in the above-mentioned background technology, such as how to automatically clean the condenser before measurement, improve the accuracy of determining the bubble position, and the cycle problem of water recovery and recycling.

[0006] The present invention provides the following technical solution: a fault detection device for air conditioner maintenance, comprising a base, a main body mounted on the top of the base, the main body consisting of an observation tube and side tubes movably sleeved on the left and right ends of the observation tube, and a retractable portion mounted in the side tubes, a cleaning assembly and a water supply assembly mounted on the top and bottom of the observation tube, respectively, a transmission assembly for rotating the observation tube mounted on the inner side of the base, an opening and closing assembly capable of being inserted into the inner cavity of the observation tube disposed on the left and right peripheries of the base and the side tubes, a pressure regulating assembly for regulating the air pressure in the retractable portion mounted on the front side of the base, a lifting assembly located on the periphery of the cleaning assembly mounted on the top of the side tubes, and a clamping assembly mounted on the outer side of the side tubes, and a controller mounted on the base;

[0007] The two ends of the observation tube are movably inserted into the notches of the side tubes, and the observation tube and the side tubes enclose a cleaning cavity. The side tubes symmetrically distributed on the left and right are fixedly installed on the top of the two ends of the base. A retractable part is provided in the side tube, and the retractable part includes a positioning ring and an air ring, wherein the positioning ring is fixedly connected to the inner wall of the side tube, and air rings are installed in the grooves inside and outside the positioning ring. An air hole is opened between the inner and outer grooves of the positioning ring, and two air rings are connected on both sides of the air hole;

[0008] The cleaning assembly includes a first protective shell, a first tubular bore, a piston rod, a first spring, and a brush plate, wherein the first protective shell is fixedly mounted on the observation tube, and symmetrically distributed first tubular bores are fixedly provided at the left and right ends of the inner cavity of the first protective shell, and a first spring is provided in the inner cavity of the first tubular bore. The piston rod is telescopically connected to the first tubular bore through the first spring, and the bottom end of the piston rod is fixedly connected to the brush plate;

[0009] The opening and closing assembly includes an electromagnet, an isolation tube, an L-shaped connecting rod and a bidirectional electric push rod, wherein the bidirectional electric push rod is installed in the assembly cavity of the base, the left and right telescopic ends of the bidirectional electric push rod are fixedly connected to the electromagnet through the L-shaped connecting rod, and an isolation tube is movably provided on the inner side of the electromagnet.

[0010] Furthermore, the observation tube, cleaning assembly and water supply assembly rotate coaxially in a forward and reverse alternating manner under the drive of the transmission assembly, and the unidirectional rotation angle does not exceed 180 degrees, thereby preventing the water supply pipe or water delivery pipe from winding, and after each cleaning cycle, the cleaning assembly and water supply assembly are reset to their initial state.

[0011] Furthermore, a connecting opening is provided between the retractable portion and the middle portion of the side tube, and the outer diameter of the retractable portion does not exceed half the side wall width of the side tube, that is, space is provided for pushing the Z-shaped connecting plate outward when the retractable portion is inflated. In addition, an air pressure sensor is provided in the air ring.

[0012] Furthermore, the opening and closing assembly also includes a magnetic strip, a plug handle and a second spring, wherein the magnetic strip is circumferentially distributed inside the side wall of the isolation tube, and the bottom of the isolation tube close to one end of the observation tube is sealed with a plug handle, and the plug handle is transmission-connected to the bottom wall of the isolation tube through the second spring, and the isolation tube and the observation tube are both made of transparent hard plastic material.

[0013] Furthermore, the cleaning component also includes a Z-shaped connecting plate, a pushing rod and a pressure sensor, wherein the bottom end of the piston rod is also fixedly connected to the Z-shaped connecting plate extending to the top of the retractable portion, and the Z-shaped connecting plate is located on the upper layer of the brush plate, and the top wall of the Z-shaped connecting plate close to the retractable portion is fixedly connected to the pushing rod, and the pushing rod moves through the observation tube, and the inner cavity of the first protective shell is fixedly installed with a pressure sensor located directly above the pushing rod.

[0014] Furthermore, the transmission assembly includes a first gear ring, a transmission gear and a reversible motor, wherein the first gear ring is fixedly sleeved on the outer wall of the end of the observation tube, and the bottom of the first gear ring is engaged with the transmission gear, the transmission gear is fixedly sleeved on the output shaft of the reversible motor, and the reversible motor is installed on the side wall of the base.

[0015] Furthermore, the water supply assembly includes a second protective shell, a second barrel, a piston tube and a fourth spring, wherein the second protective shell is fixedly mounted on the observation tube, a second barrel is mounted in the middle of the inner cavity of the second protective shell, a fourth spring is provided at the bottom of the inner cavity of the second barrel, the piston tube is telescopically connected to the second barrel through the fourth spring, and the bottom end of the second barrel is set as a liquid cavity.

[0016] Furthermore, the water supply component also includes a one-way liquid pump, a water supply pipe, a two-way liquid pump and a water delivery pipe, wherein the one-way liquid pump and the two-way liquid pump are symmetrically arranged on the side wall of the second pipe chamber, the one-way liquid pump is connected to the water tank in the supply water circuit through the water supply pipe, and the two-way liquid pump is connected to the water tank in the circulating water circuit through the water delivery pipe.

[0017] Furthermore, the pressure regulating assembly includes a fixed seat, an air collecting box, a flow guide pipe, an air suction pump and an exhaust pump, wherein the fixed seat is fixedly connected to the base, the air collecting box is installed on the front side of the top wall of the fixed seat, the left and right sides of the air collecting box are fixedly connected with flow guide pipes connected to the air holes of the positioning ring, and the air collecting box is provided with an air suction pump and an exhaust pump to adjust the air pressure in the air ring.

[0018] Technical effects and advantages of the present invention:

[0019] The present invention facilitates the coaxial and counter-rotating observation tube, cleaning assembly and water supply assembly through the coordinated arrangement of the cleaning assembly, the opening and closing assembly, the pressure regulating assembly and the water supply assembly, so that the rotating first spring continuously wipes and cleans the wet condenser surface to remove dirt attached to the condenser surface, providing a good testing environment for subsequent bubble method leakage detection. When performing the bubble test, the inner and outer double-layer air rings are gradually inflated through the pressure regulating assembly. When the bottom wall of the brush plate exceeds the upper layer of the isolation tube, the isolation tube is merged on the inner side of the retractable portion through the adjustment of the opening and closing assembly. As the air ring continues to inflate, the inner air ring will eventually wrap the sealed condenser tube, and a sealed detection cavity is formed between the inner air ring and the isolation tube. Water is then injected into the detection cavity to observe the bubble state on the condenser surface and determine the leakage point, so as to realize automatic cleaning of the condenser tube before measurement, improve the accuracy of judging the bubble generation position, and improve the cycle of water recovery and recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the overall structure of the present invention and its partial cross-section.

[0022] Figure 3 For the present invention Figure 2 Schematic diagram of the remaining structure after removing the lifting component and the clamping component.

[0023] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point A in the middle.

[0024] Figure 5 For the present invention Figure 3 Schematic diagram of the structure at point B.

[0025] Figure 6 For the present invention Figure 3 Schematic diagram of the structure from another side.

[0026] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point C.

[0027] The accompanying drawings are marked as follows: 1. base; 2. main body; 201. observation tube; 202. side tube; 203. retractable part; 2031. positioning ring; 2032. air ring; 3. cleaning assembly; 301. first protective shell; 302. first barrel; 303. piston rod; 304. first spring; 305. brush plate; 306. Z-shaped connecting plate; 307. push rod; 308. pressure sensor; 4. transmission assembly; 401. first gear ring; 402. transmission gear; 403. reversible motor; 5. opening and closing assembly; 501. electromagnet; 502. isolation tube; 503. L-shaped connecting rod; 504. two-way electric push rod; 505. magnetic strip; 506. plug handle; 507 , second spring; 6. pressure regulating assembly; 601. fixed seat; 602. air collecting box; 603. guide tube; 604. vacuum pump; 605. exhaust pump; 7. water supply assembly; 701. second protective shell; 702. second barrel; 703. piston tube; 704. fourth spring; 705. one-way liquid pump; 706. water supply pipe; 707. two-way liquid pump; 708. water delivery pipe; 8. lifting assembly; 801. roller; 802. positioning rod; 803. driving gear; 804. handle; 9. clamping assembly; 901. base ring; 902. fixing rod; 903. second gear ring; 904. recursive rod; 905. fifth spring; 906. rotating wheel; 10. controller. DETAILED DESCRIPTION

[0028] The technical solutions of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The fault detection device for air conditioning maintenance involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] Reference Figure 1-7The present invention provides a fault detection device for air conditioner maintenance, comprising a base 1, with a main body 2 mounted on the top of the base 1. The main body 2 comprises an observation tube 201, side tubes 202 movably connected to the left and right ends of the observation tube 201, and a retractable portion 203 mounted within the side tubes 202. A cleaning assembly 3 and a water supply assembly 7 are mounted on the top and bottom of the observation tube 201, respectively. A transmission assembly 4 for rotating the observation tube 201 is mounted on the inner side of the base 1, and an opening and closing assembly 5 capable of being inserted into the inner cavity of the observation tube 201 is disposed on the left and right peripheries of the base 1 and the side tubes 202. A pressure regulating component 6 for adjusting the air pressure of the retractable part 203 is installed on the front side of the base 1, and a lifting component 8 located on the periphery of the cleaning component 3 is installed on the top of the side tube 202, that is, the setting position of the lifting component 8 cannot interfere with the coaxial rotation trajectory of the observation tube 201, the cleaning component 3 and the water supply component 7. The same is true for the gap between the base 1 and the observation tube 201, and a clamping component 9 is installed on the outside of the side tube 202. The lifting component 8 is rotated to drive the clamping component 9 to tighten the condenser tube inserted inside it. A controller 10 is also installed on the base 1.

[0030] In this embodiment, it should be specifically explained that the controller 10 is used to receive the determination information output by the sensor, and output the control instructions to the actuator through analysis and processing;

[0031] The observation tube 201, the cleaning component 3 and the water supply component 7 rotate in a coaxial forward and reverse direction under the drive of the transmission component 4, and the unidirectional rotation angle does not exceed 180 degrees to prevent the water supply pipe 706 or the water delivery pipe 708 from winding. After each cleaning cycle, the cleaning component 3 and the water supply component 7 are reset to the initial state marked at Figure 3 shown.

[0032] Reference Figure 1-5 The two ends of the observation tube 201 are movably inserted into the notches of the side tube 202, and a sealing ring is provided at the connection between the observation tube 201 and the notch to prevent the sewage accumulated in the cleaning chamber from flowing out from the gap between the two and contaminating the multiple components arranged vertically, affecting the use. The observation tube 201 and the side tube 202 enclose a cleaning chamber;

[0033] The symmetrically distributed side tubes 202 are fixedly mounted on the top of both ends of the base 1. The side tubes 202 are provided with retractable portions 203. The retractable portions 203 are connected to the middle of the side tubes 202 by a through opening. The outer diameter of the retractable portions 203 does not exceed half the width of the side wall of the side tubes 202. This provides space for the retractable portions 203 to push the Z-shaped connecting plate 306 outward when inflated.

[0034] The retracting portion 203 includes a positioning ring 2031 and an air ring 2032, wherein the positioning ring 2031 is fixedly connected to the inner wall of the side tube 202, and air rings 2032 are installed in the grooves inside and outside the positioning ring 2031. An air hole is opened between the grooves inside and outside the positioning ring 2031, and the two sides of the air hole are connected to the two air rings 2032 respectively, so as to facilitate the simultaneous increase and decrease of the pressure of the inner and outer air rings 2032. In addition, an air pressure sensor is provided in the air ring 2032 to monitor the pressure of the gas filled in the air ring 2032.

[0035] In this embodiment, it should be specifically noted that the width of the retractable portion 203 at least does not interfere with the vertical displacement trajectory of the brush plate 305 .

[0036] Reference Figure 2-4 and Figure 6-7 The cleaning assembly 3 includes a first protective shell 301, a first tube chamber 302, a piston rod 303, a first spring 304 and a brush plate 305, wherein the first protective shell 301 is fixedly mounted on the observation tube 201, and symmetrically distributed first tube chambers 302 are fixedly provided at the left and right ends of the inner cavity of the first protective shell 301, and a first spring 304 is provided in the inner cavity of the first tube chamber 302. The piston rod 303 is telescopically connected to the first tube chamber 302 through the first spring 304, and the bottom end of the piston rod 303 is fixedly connected to the brush plate 305. When the Z-shaped connecting plate 306 is lifted by the unexpanded air ring 2032, the brush plate 305 carried by the bottom end of the piston rod 303 touches the outer wall of the condenser tube in this section under the elastic force of the first spring 304;

[0037] The cleaning component 3 also includes a Z-shaped connecting plate 306, a pushing rod 307 and a pressure sensor 308, wherein the bottom end of the piston rod 303 is also fixedly connected to the Z-shaped connecting plate 306 extending to the top of the retracting portion 203, and the Z-shaped connecting plate 306 is located on the upper layer of the brush plate 305, and the top wall of the Z-shaped connecting plate 306 close to the retracting portion 203 is fixedly connected to the pushing rod 307, and the pushing rod 307 movably penetrates the observation tube 201, and the inner cavity of the first protective shell 301 is fixedly installed with a pressure sensor 308 located just above the pushing rod 307. As the air ring 2032 continues to inflate, the inner air ring 2032 will wrap the sealed condenser tube, and the outer air ring 2032 will carry the pushing rod 307 to press the pressure sensor 308, and finally the pressure sensor 308 detects this pressure to form a judgment information;

[0038] The transmission assembly 4 includes a first gear ring 401, a transmission gear 402 and a reversible motor 403, wherein the first gear ring 401 is fixedly sleeved on the outer wall of the end of the observation tube 201, and the bottom of the first gear ring 401 is engaged with the transmission gear 402, the transmission gear 402 is fixedly sleeved on the output shaft of the reversible motor 403, and the reversible motor 403 is installed on the side wall of the base 1.

[0039] In this embodiment, it should be specifically explained that a sealing ring is provided at the connection between the push rod 307 and the observation tube 201, and its purpose is also to prevent sewage accumulated in the cleaning chamber from flowing out from the gap between the two and contaminating the multiple components arranged vertically.

[0040] Reference Figure 3 and Figure 5 and Figure 6-7 The water supply assembly 7 includes a second protective shell 701, a second tube chamber 702, a piston tube 703 and a fourth spring 704, wherein the second protective shell 701 is fixedly mounted on the observation tube 201, the second tube chamber 702 is mounted in the middle of the inner cavity of the second protective shell 701, and the fourth spring 704 is provided at the bottom of the inner cavity of the second tube chamber 702. The piston tube 703 is telescopically connected to the second tube chamber 702 through the fourth spring 704, and the bottom end of the second tube chamber 702 is set as a liquid chamber;

[0041] The water supply assembly 7 also includes a one-way liquid pump 705, a water supply pipe 706, a two-way liquid pump 707 and a water delivery pipe 708, wherein the one-way liquid pump 705 and the two-way liquid pump 707 are symmetrically arranged on the side wall of the second pipe chamber 702, the one-way liquid pump 705 is connected to the water tank in the supply water circuit through the water supply pipe 706, and the two-way liquid pump 707 is connected to the water tank in the circulating water circuit through the water delivery pipe 708.

[0042] In this embodiment, it should be specifically noted that when the fourth spring 704 is at its original length, the top end of the piston tube 703 does not exceed the lowest point of the opening of the side tube 202 to avoid interfering with the movement trajectory of the isolation tube 502. In addition, the lengths of the water supply pipe 706 and the water delivery pipe 708 are set to at least meet the requirements of the water supply assembly 7 when rotating.

[0043] Characteristics of the one-way liquid pump 705: drainage and discharge functions: This pump is intelligently controlled by its internal mechanical device and can automatically switch its operating mode according to the input signal, switching from drainage state to discharge state, or vice versa;

[0044] In drainage mode, the pump draws liquid from one place and delivers it to a designated location; in drainage mode, it drains the accumulated liquid.

[0045] Reference Figure 2-6 The opening and closing assembly 5 includes an electromagnet 501, an isolation tube 502, an L-shaped connecting rod 503 and a bidirectional electric push rod 504, wherein the bidirectional electric push rod 504 is installed in the assembly cavity of the base 1, and the left and right telescopic ends of the bidirectional electric push rod 504 are fixedly connected to the electromagnet 501 through the L-shaped connecting rod 503, and the inner side of the electromagnet 501 is movably provided with an isolation tube 502;

[0046] The opening and closing assembly 5 also includes a magnetic strip 505, a plug handle 506, and a second spring 507. The magnetic strip 505 is circumferentially distributed within the side wall of the isolation tube 502. The plug handle 506 is sealed and plugged into the bottom of the isolation tube 502 near the end of the observation tube 201. The plug handle 506 is connected to the inner bottom wall of the isolation tube 502 through the second spring 507. When the bubble method is required for leak detection, the left and right telescopic ends of the bidirectional electric push rod 504 move the electromagnets 501 and the isolation tube 502 toward each other through the L-shaped connecting rod 503. The electromagnet 501 and the magnetic strip 505 are controlled to convert into magnetic repulsion, so that when the electromagnet 501 moves to the outside of the opening of the side tube 202, the isolation tubes 502 on both sides can be merged on the inner side of the retractable portion 203 under the action of this magnetic repulsion. As the air ring 2032 continues to inflate and expand, the inner air ring 2032 will eventually wrap the sealed condenser tube, and a sealed detection cavity is formed between the inner air ring 2032 and the isolation tube 502. Water is then injected into the detection cavity, and the bubble state on the surface of the condenser tube is observed to determine the leakage point.

[0047] In this embodiment, it should be specifically noted that the isolation tube 502 and the observation tube 201 are both made of transparent hard plastic material;

[0048] There is a communicating passage between the electromagnet 501 and the isolation tube 502 to facilitate the insertion of the condenser tube;

[0049] When the water injection inspection is completed and the control device is reset, the electromagnet 501 and the magnetic strip 505 are converted into magnetic attraction, and as the bidirectional electric push rod 504 carries the L-shaped connecting rod 503 and the electromagnet 501 outward, the isolation tube 502 is gradually pulled out of the observation tube 201 and the side tube 202 until it returns to its original position.

[0050] Reference Figure 3 and Figure 5-6 The pressure regulating assembly 6 includes a fixed seat 601, an air collecting box 602, a guide tube 603, an air suction pump 604 and an exhaust pump 605, wherein the fixed seat 601 is fixedly connected to the base 1, and the air collecting box 602 is installed on the front side of the top wall of the fixed seat 601. The left and right sides of the air collecting box 602 are fixedly connected with the guide tube 603 connected to the air hole of the positioning ring 2031. The air collecting box 602 is provided with an air suction pump 604 and an exhaust pump 605 to adjust the air pressure in the air ring 2032.

[0051] Reference Figure 1-2 The lifting assembly 8 includes a roller shaft 801, a positioning rod 802, a driving gear 803 and a handle 804, wherein the positioning rod 802 is fixedly mounted on the observation tube 201, the roller shaft 801 is rotatably sleeved on the positioning rod 802, and the roller shaft 801 is fixedly sleeved with a handle 804 located between the positioning rod 802, and both ends of the roller shaft 801 are fixedly sleeved with the driving gear 803;

[0052] The clamping assembly 9 includes a base ring 901, a fixed rod 902, a second gear ring 903, a push rod 904, a fifth spring 905 and a rotating wheel 906, wherein the base ring 901 is fixedly mounted on the outer side of the side tube 202 by the fixed rod 902, the second gear ring 903 is threadedly sleeved on the outer periphery of the base ring 901, and the second gear ring 903 is meshed with the driving gear 803, an arc-shaped extrusion cavity is provided in the second gear ring 903, the push rod 904 movably passes through the side wall of the base ring 901, and a fifth spring 905 is provided on the rod body of the push rod 904, one end of the fifth spring 905 is connected to the inner wall of the base ring 901, and the other end of the fifth spring 905 is connected to the rotating seat of the push rod 904, in addition, a rotating wheel 906 is movably provided on the rotating seat of the push rod 904;

[0053] In addition, the device is also equipped with a scribing marking structure, which is recorded in the patents disclosed in this field, that is, the prior art, and this application will not go into details here.

[0054] Working principle of the present invention:

[0055] The detection device is put on the initial section of the condenser tube. Then, the operator holds the handle 804 to rotate the roller shaft 801 sleeved therewith, so that the coaxially arranged roller shaft 801 and the driving gear 803 rotate. The rotating driving gear 803 drives the second gear ring 903 meshing therewith to spin, so that the second gear ring 903 rotates outward along the wall thread of the base ring 901, causing the circumferentially distributed push rod 904 to be pressed by the arc-shaped extrusion cavity of the second gear ring 903 and displaced inward. Then, the fifth spring 905 sleeved on the surface of the push rod 904 is stretched until the rotating wheel 906 movably provided on the rotating seat of the push rod 904 presses against the outer wall of the condenser tube, so that the rotating wheel 906 can support the device and meet the movement requirements of the device on the surface of the condenser tube, so as to detect and troubleshoot the leakage points of the condenser tube in sections.

[0056] At the same time, the brush plate 305 carried by the bottom end of the piston rod 303 touches the outer wall of the condenser tube in this section under the elastic force of the first spring 304. After the detection device grips the outer wall of the condenser tube, the one-way liquid pump 705 connected to the supply water path is started. The one-way liquid pump 705 extracts the clean water in the water tank in the supply water path through the water supply pipe 706 in the form of standard pressure, and injects the clean water into the liquid cavity of the second tube bore 702. Then the liquid flows through the piston tube 703 and sprays to the bottom wall of the condenser tube, moistening the surface of the condenser tube, and finally drips to the bottom of the cleaning cavity surrounded by the observation tube 201 and the side tube 202. At the same time, the reversible motor 403 is started, and the output shaft of the reversible motor 403 drives The transmission gear 402 connected thereto rotates alternately forward and reverse, and the rotating transmission gear 402 drives the first gear ring 401 meshed with it, so that the first gear ring 401 carries the observation tube 201, the cleaning component 3 and the water supply component 7 coaxially and rotates 180 degrees forward and reverse, causing the rotating first spring 304 to continuously wipe and clean the wetted condenser tube surface to remove dirt attached to the condenser tube surface, providing a good test environment for subsequent bubble method leakage detection. After the cleaning of the condenser tube surface is completed, the cleaning component 3 and the water supply component 7 on the observation tube 201 are reset and stop running. At this time, the drain plug at the bottom of the observation tube 201 is pulled out to discharge the sewage retained in the cleaning chamber;

[0057] Next, the vacuum pump 604 is started. The vacuum pump 604 draws external air and injects it into the air rings 2032 inside and outside the positioning ring 2031 through the air collecting box 602 and the guide tube 603 in turn, so that the inner and outer double-layer air rings 2032 are gradually inflated and expanded, and the expanded air ring 2032 on the outer side continuously lifts the Z-shaped connecting plate 306, and then the piston rod 303 and the brush plate 305 carried by the Z-shaped connecting plate 306 move upward along the inner cavity of the first tube chamber 302 and compress the first spring 304, causing the brush plate 305 to gradually lift away from the condenser tube. When the bottom wall of the brush plate 305 exceeds the upper layer of the isolation tube 502, the air pressure in the air ring 2032 reaches the standard air pressure threshold set by the air pressure sensor. When it is determined that the isolation tube 502 can be inserted into the observation tube 201 along the opening of the side tube 202, the air pressure sensor outputs air pressure determination information to the controller 10. The controller 10 receives the air pressure determination information and outputs control instructions to the bidirectional electric push rod 504 and the electromagnet 501, controls the left and right telescopic ends of the bidirectional electric push rod 504 to move the electromagnets 501 and the isolation tube 502 on both sides toward each other through the L-shaped connecting rod 503, and controls the conversion between the electromagnet 501 and the magnetic strip 505 into a magnetic repulsive force, so that when the electromagnet 501 is displaced to the outside of the opening of the side tube 202, the isolation tubes 502 on both sides can be merged inside the retractable portion 203 under the action of this magnetic repulsive force;

[0058] As the air ring 2032 continues to inflate, the inner air ring 2032 will eventually wrap around the sealed condenser tube, and the outer air ring 2032 will carry the push rod 307 to press the pressure sensor 308. Then the pressure sensor 308 detects this pressure and determines that a sealed detection cavity has been formed between the inner air ring 2032 and the isolation tube 502. The pressure sensor 308 then outputs pressure determination information to the controller 10. The controller 10 receives the pressure determination information and outputs a control instruction to the bidirectional liquid pump 707. The bidirectional liquid pump 707 pumps liquid at high pressure through the water pipe 708. Take the water in the water tank in the circulating water circuit, and inject clean water into the liquid cavity of the second tube chamber 702. The high-pressure liquid flow pushes the piston tube 703 upward to lift the plug handle 506 in the side wall of the isolation tube 502, so that the top end of the piston tube 703 is inserted into the detection cavity and water is injected until the detection cavity is filled. The bubble state on the surface of the condenser is observed through the observation tube 201 and the electromagnet 501 to determine the leakage point. After the detection is completed, the two-way liquid pump 707 is controlled to switch the drainage direction to return the water in the detection cavity to the water tank, and then the control equipment is reset to detect and check the leakage point of the condenser in sections.

[0059] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or modifications within the technical scope disclosed by the present invention; according to the technical plan and its improved conception of the present invention, these should be included under the protection of the present invention.

Claims

1. A fault detection device for air conditioner maintenance, comprising a base (1), a main body (2) being mounted on the top of the base (1), characterized in that: The main body (2) is composed of an observation tube (201), side tubes (202) movably sleeved on the left and right ends of the observation tube (201), and a retractable portion (203) installed in the side tubes (202). The top and bottom of the observation tube (201) are respectively installed with a cleaning component (3) and a water supply component (7), and the left and right peripheries of the base (1) and the side tubes (202) are provided with an opening and closing component (5) capable of being inserted into the inner cavity of the observation tube (201). The two ends of the observation tube (201) are movably inserted into the grooves of the side tube (202), and the observation tube (201) and the side tube (202) enclose a cleaning chamber, and the side tubes (202) symmetrically distributed on the left and right are fixedly installed on the top of the two ends of the base (1), and the retractable portion (203) includes a positioning ring (2031) and an air ring (2032), wherein the positioning ring (2031) is fixedly connected to the inner wall of the side tube (202), and the air rings (2032) are installed in the grooves inside and outside the positioning ring (2031), and an air hole is opened between the inner and outer grooves of the positioning ring (2031), and the two sides of the air hole are respectively connected to the two air rings (2032); The cleaning assembly (3) includes a first protective shell (301), the first protective shell (301) is fixedly mounted on the observation tube (201), symmetrically distributed first tube bores (302) are fixedly provided at the left and right ends of the inner cavity of the first protective shell (301), a first spring (304) is provided in the inner cavity of the first tube bore (302), the first tube bore (302) is elastically connected to the piston rod (303) via the first spring (304), and the bottom end of the piston rod (303) is fixedly connected to a brush plate (305); A transmission assembly (4) for driving the observation tube (201) to rotate is installed on the inner side of the base (1), and the transmission assembly (4) includes a first gear ring (401), a transmission gear (402) and a reversible motor (403), wherein the first gear ring (401) is fixedly sleeved on the outer wall of the end of the observation tube (201), and the bottom of the first gear ring (401) is meshed with the transmission gear (402), the transmission gear (402) is fixedly sleeved with the output shaft of the reversible motor (403), and the reversible motor (403) is installed on the side wall of the base (1); the piston rod The brush plate (305) carried at the bottom end of (303) touches the outer wall of the condenser tube in this section under the elastic force of the first spring (304); the output shaft of the reversible motor (403) drives the transmission gear (402) connected thereto to rotate alternately forward and reverse, and the rotating transmission gear (402) drives the first gear ring (401) meshed with it, so that the first gear ring (401) carries the observation tube (201), the cleaning component (3) and the water supply component (7) coaxially and rotates 180 degrees forward and reverse, causing the rotating brush plate (305) to continuously wipe and clean the wetted condenser tube surface.

2. The air conditioner maintenance fault detection device according to claim 1, characterized in that: The cleaning assembly (3) further comprises a Z-shaped connecting plate (306), a pushing rod (307) and a pressure sensor (308), wherein the bottom end of the piston rod (303) is fixedly connected to the Z-shaped connecting plate (306) extending to the top of the retractable portion (203), and the Z-shaped connecting plate (306) is located on the upper layer of the brush plate (305), and the top wall of the Z-shaped connecting plate (306) close to the retractable portion (203) is fixedly connected to the pushing rod (307), and the pushing rod (307) is movable through the observation tube (201), and the inner cavity of the first protective shell (301) is fixedly installed with a pressure sensor (308) located directly above the pushing rod (307).

3. The air conditioner maintenance fault detection device according to claim 2, characterized in that: The retractable portion (203) is provided with a connecting opening in the middle of the side tube (202), and the outer diameter of the retractable portion (203) does not exceed half the side wall width of the side tube (202), that is, space is provided for the retractable portion (203) to push the Z-shaped connecting plate (306) outward when it is inflated. In addition, an air pressure sensor is provided in the air ring (2032).

4. The air conditioner maintenance fault detection device according to claim 1, characterized in that: The opening and closing assembly (5) comprises an electromagnet (501), an isolation tube (502), an L-shaped connecting rod (503) and a bidirectional electric push rod (504), wherein the bidirectional electric push rod (504) is installed in the assembly cavity of the base (1), the left and right telescopic ends of the bidirectional electric push rod (504) are fixedly connected to the electromagnet (501) via the L-shaped connecting rod (503), and the isolation tube (502) is movably provided on the inner side of the electromagnet (501).

5. The air conditioner maintenance fault detection device according to claim 4, characterized in that: The opening and closing assembly (5) further comprises a magnetic strip (505), a plug handle (506) and a second spring (507), wherein the magnetic strip (505) is circumferentially distributed within the side wall of the isolation tube (502), and the plug handle (506) is sealed and plugged into the bottom of the isolation tube (502) at one end close to the observation tube (201), and the plug handle (506) is transmission-connected to the inner bottom wall of the isolation tube (502) via the second spring (507), and the isolation tube (502) and the observation tube (201) are both made of transparent hard plastic material.

6. The air conditioner maintenance fault detection device according to claim 1, characterized in that: The water supply assembly (7) comprises a second protective shell (701), a second tube bore (702), a piston tube (703) and a fourth spring (704), wherein the second protective shell (701) is fixedly mounted on the observation tube (201), the second tube bore (702) is mounted in the middle of the inner cavity of the second protective shell (701), the fourth spring (704) is arranged at the bottom of the inner cavity of the second tube bore (702), the piston tube (703) is telescopically connected to the second tube bore (702) via the fourth spring (704), and the bottom end of the second tube bore (702) is arranged as a liquid cavity.

7. The air conditioner maintenance fault detection device according to claim 6, characterized in that: The water supply assembly (7) further comprises a one-way liquid pump (705), a water supply pipe (706), a two-way liquid pump (707) and a water delivery pipe (708), wherein the one-way liquid pump (705) and the two-way liquid pump (707) are symmetrically arranged on the side wall of the second pipe chamber (702), the one-way liquid pump (705) is connected to the water tank in the supply water circuit through the water supply pipe (706), and the two-way liquid pump (707) is connected to the water tank in the circulating water circuit through the water delivery pipe (708).

8. The air conditioner maintenance fault detection device according to claim 7, characterized in that: The observation tube (201), the cleaning assembly (3) and the water supply assembly (7) rotate coaxially in a forward and reverse alternating manner under the drive of the transmission assembly (4), and the unidirectional rotation angle does not exceed 180 degrees, thereby preventing the water supply pipe (706) or the water delivery pipe (708) from winding. After each cleaning cycle, the cleaning assembly (3) and the water supply assembly (7) are reset to their initial states.

9. The air conditioner maintenance fault detection device according to claim 1, characterized in that: A pressure regulating assembly (6) for regulating the air pressure of the retractable portion (203) is installed on the front side of the base (1), and the pressure regulating assembly (6) comprises a fixed seat (601), an air collecting box (602), a flow guide pipe (603), an air extraction pump (604) and an exhaust pump (605), wherein the fixed seat (601) is fixedly connected to the base (1), the air collecting box (602) is installed on the front side of the top wall of the fixed seat (601), the flow guide pipe (603) connected to the air hole of the positioning ring (2031) is fixedly connected to the left and right sides of the air collecting box (602), and the air extraction pump (604) and the exhaust pump (605) are provided on the air collecting box (602) to regulate the air pressure in the air ring (2032).

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