Descaling auxiliary device for central air conditioner

Abstract

The utility model relates to the technical field of central air conditioners, in particular to a central air conditioner descaling auxiliary device which comprises a rectangular pipeline, a plurality of installation holes a are formed in the position, close to the left side, of the top of the rectangular pipeline, a descaling assembly is installed in each installation hole a, and a rectangular operation opening is formed in the position, close to the right side, of the top of the rectangular pipeline. A detachable sealing cover plate is arranged at the top of the rectangular operation opening, a bottom box is arranged at the position, located under the rectangular operation opening, of the bottom of the rectangular pipeline, and a collecting box is placed in the bottom box. According to the descaling auxiliary device for the central air conditioner, when an anode bar needs to be replaced, a worker disassembles a sealing cover from a circular fixing pipe and then moves the sealing cover upwards, the sealing cover drives an internal thread connecting pipe, a thread connecting rod and the anode bar to move upwards synchronously, and therefore the anode bar is taken out of a rectangular pipeline; then, a new anode bar is connected with the internal thread connecting pipe, and finally, the sealing cover is in threaded connection with the circular fixing pipe, so that the anode bar can be replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of central air conditioners, in particular to a central air conditioner descaling auxiliary device. Background Art

[0002] The central air conditioning circulating water treatment is achieved through the central air conditioning circulating water system. The central air conditioning circulating water system mainly includes two parts: the cooling water system and the chilled water central air conditioning circulating water treatment system. When the external conditions change, the water quality is often unstable, and scaling, corrosion and rust will occur. If proper water treatment is not performed, it will inevitably cause a series of problems such as pipe blockage, corrosion leakage, and reduced heat exchange efficiency, affecting the normal operation of the entire central air conditioning system. Therefore, it is particularly important to deal with the dirt of the circulating cooling water. However, in actual operation, external cleaning equipment is currently used to regularly clean the cooling water, but this method is more cumbersome.

[0003] The patent with publication number CN219860862U discloses a central air-conditioning circulating cooling water rust and scale removal device, including a scale treatment box, both sides of the scale treatment box are fixedly connected to auxiliary water tanks, one side of the two auxiliary water tanks is fixedly connected to a water pipe, two water passage chambers are provided in the auxiliary water tanks, the inner wall of the water passage chamber is provided with a water passage connected to the interior of the scale treatment box, and the inner wall of the auxiliary water tank is slidably connected to two support plates. Through the coordinated use of the scale treatment box and a plurality of anode rods, the flowing cooling water is prevented from generating dirt and metal corrosion and rusting under the dirt. Large particles generated by the anode rods and cooling water impurities fall into the scale treatment box for collection, so that the cooling water is constantly cleaned, and the efficiency is improved. There is no need to connect the equipment to the cooling tower or the circulating water pipe every time cleaning, and the time-consuming disassembly and installation are avoided.

[0004] In the specific use of the above-mentioned prior art, since the anode rod is a consumable, the anode rod needs to be replaced regularly. However, the anode rod of the above-mentioned prior art is installed at the bottom of the top plate, and the top plate needs to be disassembled each time the anode rod is replaced, which makes it inconvenient to replace the anode rod. Secondly, the water-insoluble substances produced by the descaling of the anode rod will fall into the scale treatment box for collection. When it is necessary to clean the large particles in the scale treatment box, it is difficult for the staff to remove the precipitated large particles, and it is difficult to clean the scale treatment box. In view of this, we propose a central air-conditioning descaling auxiliary device. Utility Model Content

[0005] The purpose of the utility model is to provide a central air-conditioning descaling auxiliary device to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A central air conditioner descaling auxiliary device, comprising a rectangular pipe, a plurality of mounting holes a arranged equidistantly from left to right are provided at the top of the rectangular pipe and near the left side, a descaling assembly is installed in each mounting hole a, the descaling assembly comprises a circular fixed pipe fixedly connected to the mounting hole a, a detachable sealing cover is threadedly connected to the top of the circular fixed pipe, an internal threaded connecting pipe is provided at the middle of the top of the inner wall of the sealing cover, a threaded connecting rod is threadedly connected to the internal threaded connecting pipe, an anode rod is provided at the bottom end of the threaded connecting rod, and the descaling principle of the anode rod is used to protect the metal material of the inner tank of the equipment from being corroded, thereby playing the role of auxiliary descaling;

[0008] When the anode rod needs to be replaced, the staff rotates the sealing cover to separate the sealing cover from the circular fixed tube, and then moves the sealing cover upward, and the sealing cover drives the internal threaded connecting tube, the threaded connecting rod and the anode rod to move upward synchronously, so as to take the anode rod out of the rectangular pipe, and then rotate the threaded connecting rod to move the threaded connecting rod out of the internal threaded connecting tube, and then thread the threaded connecting rod on the new anode rod into the internal threaded connecting tube, and finally thread the sealing cover with the circular fixed tube, so as to realize the replacement of the anode rod;

[0009] A rectangular operating port is provided at the top of the rectangular pipe and near the right side for the collection box to pass through, a removable sealing cover is provided at the top of the rectangular operating port, a first partition is provided in the rectangular pipe and at the left side of the rectangular operating port, a U-shaped through hole is provided at the bottom of the left side of the first partition, a bottom box is provided at the bottom of the rectangular pipe and directly below the rectangular operating port, the bottom box is connected with the rectangular pipe, a collection box is placed in the bottom box, the height of the collection box is greater than the height of the bottom box, a rectangular through hole b is provided on the left side of the collection box and is connected with the U-shaped through hole, so that water on the left side of the first partition enters the collection box from the U-shaped through hole and the rectangular through hole b in turn, a filter is provided on the right side of the collection box and near the top, large particles generated by descaling are filtered through the filter, and the large particles are collected in the collection box, so that the staff can clean the impurities generated by descaling.

[0010] Preferably, a water inlet mounting plate is provided on the left side of the outer wall of the rectangular pipe, and a water outlet mounting plate is provided on the right side of the outer wall of the rectangular pipe, which are used to be connected to the pipe of circulating cooling water of the central air conditioner.

[0011] Preferably, the outer wall of the circular fixed tube is bonded to the mounting hole a by waterproof glue, and an annular fixing plate is provided on the outer wall of the circular fixed tube near the top. The bottom of the annular fixing plate is bonded to the top of the rectangular pipe by waterproof glue. The annular fixing plate supports the circular fixed tube and is sealed and connected to the rectangular pipe by waterproof glue, thereby ensuring the sealing of the connection.

[0012] Preferably, a hand wheel is provided on the top of the sealing cover to facilitate the staff to rotate the sealing cover.

[0013] Preferably, threaded rods are provided at the top of the rectangular pipe and near the four corners of the rectangular operating port, and mounting holes b for the threaded rods to pass through are opened at the bottom of the sealing cover plate and near the four corners. The threaded ends of the threaded rods pass through the mounting holes b and are threadedly connected with clamping nuts. Through the cooperation of the threaded rods and the clamping nuts, the sealing cover plate is pressed against the top of the rectangular pipe. This connection structure can facilitate the staff to disassemble and assemble the sealing cover plate.

[0014] Preferably, a rectangular abutment plate is provided at the bottom of the sealing cover plate, a frame-shaped rubber sleeve is bonded to the outer side of the rectangular abutment plate, the outer wall of the frame-shaped rubber sleeve is tightly fitted with the inner wall of the rectangular operating port, ensuring the sealing of the connection between the sealing cover plate and the rectangular pipe, the bottom of the frame-shaped rubber sleeve is abutted against the top of the collection box, thereby positioning the collection box.

[0015] Preferably, a frame-shaped groove is provided at the bottom of the sealing cover plate and at the top edge of the rectangular abutment plate, and a first frame-shaped rubber pad is provided at the top of the frame-shaped rubber sleeve. The first frame-shaped rubber pad is bonded to the frame-shaped groove, and the bottom of the first frame-shaped rubber pad fits tightly with the top of the rectangular pipe, thereby further improving the sealing performance of the connection between the sealing cover plate and the rectangular pipe.

[0016] Preferably, a lifting rod is provided between the front and rear sides of the inner wall of the collection box and near the top, so that the staff can easily take the collection box out of the rectangular pipe and the bottom box.

[0017] Preferably, a second partition is provided in the rectangular pipe and on the right side of the rectangular operating port, and a rectangular through hole a connected to the filter screen is opened on the left side of the second partition. The second partition cooperates with the first partition to position the collection box.

[0018] Preferably, a second frame-shaped rubber pad is embedded on the left side of the collecting box and close to the outer edge of the rectangular through hole b, and the left side of the second frame-shaped rubber pad is tightly fitted with the right side of the first partition. A third frame-shaped rubber pad is embedded on the right side of the collecting box and close to the outer edge of the filter net, and the right side of the third frame-shaped rubber pad is tightly fitted with the left side of the second partition, ensuring that all the descaling water in the rectangular pipe passes through the collecting box to prevent water from being discharged to the right without being filtered.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. The central air conditioning descaling auxiliary device, when the anode rod needs to be replaced, the staff rotates the sealing cover to separate the sealing cover from the circular fixed tube, and then moves the sealing cover upward, and the sealing cover drives the internal threaded connecting tube, the threaded connecting rod and the anode rod to move upward synchronously, so as to take the anode rod out of the rectangular pipe, and then rotate the threaded connecting rod to move the threaded connecting rod out of the internal threaded connecting tube, and then thread the threaded connecting rod on the new anode rod into the internal threaded connecting tube, and finally thread the sealing cover with the circular fixed tube, so as to realize the replacement of the anode rod.

[0021] 2. In the central air-conditioning descaling auxiliary device, the water on the left side of the first partition enters the collection box from the U-shaped through hole and the rectangular through hole b in turn. The filter net on the right side of the collection box filters the large particles generated by descaling and collects the large particles in the collection box to facilitate the staff to clean the impurities generated by descaling.

[0022] 3. The central air conditioner descaling auxiliary device presses the sealing cover plate on the top of the rectangular pipe through the cooperation of the threaded rod and the pressing nut. The connection structure can facilitate the staff to disassemble and install the sealing cover plate.

[0023] 4. In the central air conditioning descaling auxiliary device, the outer wall of the frame-shaped rubber sleeve is tightly fitted with the inner wall of the rectangular operating port, and the bottom of the first frame-shaped rubber pad is tightly fitted with the top of the rectangular pipe, ensuring the sealing of the connection between the sealing cover plate and the rectangular pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall first-view structure of the utility model;

[0025] Figure 2 It is a schematic diagram of the overall structure of the utility model from a second viewing angle;

[0026] Figure 3 It is a schematic diagram of the internal assembly structure of the rectangular pipe in the utility model;

[0027] Figure 4 It is one of the partial structural schematic diagrams of the utility model;

[0028] Figure 5 It is a schematic diagram of the structure of the descaling component in the utility model;

[0029] Figure 6 It is a partial structural schematic diagram of the descaling component in the utility model;

[0030] Figure 7 It is a schematic diagram of the assembly structure of the collecting box and the second frame-shaped rubber pad in the utility model;

[0031] Figure 8 It is a schematic diagram of the assembly structure of the collection box and the third frame-shaped rubber pad in the utility model;

[0032] Fig. 9 This is the second schematic diagram of the partial structure of the utility model;

[0033] Fig.10 It is a schematic diagram of the assembly structure of the sealing cover plate and the frame-shaped rubber sleeve in the utility model.

[0034] In the figure: 1. rectangular pipe; 10. water inlet mounting plate; 11. water outlet mounting plate; 12. mounting hole a; 13. first partition; 130. U-shaped through hole; 14. second partition; 140. rectangular through hole a; 15. rectangular operation port; 16. threaded rod; 2. descaling component; 20. circular fixed pipe; 21. annular fixed plate; 22. sealing cover; 23. internal threaded connecting pipe; 24. threaded connecting rod; 25. anode rod; 26. hand wheel; 3. bottom box; 4. collecting box; 40. rectangular through hole b; 41. filter screen; 42. lifting rod; 5. sealing cover plate; 50. mounting hole b; 51. rectangular abutment plate; 52. frame-shaped groove; 6. frame-shaped rubber sleeve; 60. first frame-shaped rubber pad; 7. pressing nut; 8. second frame-shaped rubber pad; 9. third frame-shaped rubber pad. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] See also Figure 1-Figure 10 , the utility model provides a technical solution:

[0038] A central air conditioner descaling auxiliary device comprises a rectangular duct 1, a plurality of mounting holes a12 arranged equidistantly from left to right are provided at the top of the rectangular duct 1 and near the left side, a descaling assembly 2 is installed in each mounting hole a12, the descaling assembly 2 comprises a circular fixed tube 20 fixedly connected in the mounting hole a12, a detachable sealing cover 22 is threadedly connected at the top of the circular fixed tube 20, an internal threaded connecting tube 23 is provided at the middle of the top of the inner wall of the sealing cover 22, a threaded connecting rod 24 is internally threadedly connected to the internal threaded connecting tube 23, an anode rod 25 is provided at the bottom end of the threaded connecting rod 24, and the descaling principle of the anode rod is used to protect the metal material such as iron of the inner tank of the equipment from being corroded, thereby playing the role of auxiliary descaling;

[0039] When the anode rod 25 needs to be replaced, the staff rotates the sealing cover 22 to separate the sealing cover 22 from the circular fixed tube 20, and then moves the sealing cover 22 upward, and the sealing cover 22 drives the internal threaded connecting tube 23, the threaded connecting rod 24 and the anode rod 25 to move upward synchronously, so as to take the anode rod 25 out of the rectangular pipe 1, and then rotates the threaded connecting rod 24 to move the threaded connecting rod 24 out of the internal threaded connecting tube 23, and then the threaded connecting rod 24 on the new anode rod 25 is threadedly connected to the internal threaded connecting tube 23, and finally the sealing cover 22 is threadedly connected to the circular fixed tube 20, so as to realize the replacement of the anode rod 25;

[0040] A rectangular operating port 15 is provided at the top and near the right side of the rectangular duct 1 for the collection box 4 to pass through. A removable sealing cover 5 is provided at the top of the rectangular operating port 15. A first partition 13 is provided in the rectangular duct 1 and at the left side of the rectangular operating port 15. A U-shaped through hole 130 is provided at the bottom of the left side of the first partition 13. A bottom box 3 is provided at the bottom of the rectangular duct 1 and directly below the rectangular operating port 15. The bottom box 3 is connected to the rectangular duct 1. A collection box 4 is placed in the bottom box 3. The height of the collection box 4 is greater than that of the bottom box 3. A rectangular through hole b40 connected to the U-shaped through hole 130 is provided on the left side of the collection box 4, so that water on the left side of the first partition 13 enters the collection box 4 from the U-shaped through hole 130 and the rectangular through hole b40 in turn. A filter screen 41 is provided on the right side of the collection box 4 and near the top. Large particles generated by descaling are filtered through the filter screen 41 and collected in the collection box 4 to facilitate the staff to clean up the impurities generated by descaling.

[0041] In this embodiment, a water inlet mounting plate 10 is provided on the left side of the outer wall of the rectangular pipe 1, and a water outlet mounting plate 11 is provided on the right side of the outer wall of the rectangular pipe 1 for connecting to the pipe of circulating cooling water of the central air conditioner.

[0042] Specifically, the outer wall of the circular fixed tube 20 is bonded to the mounting hole a12 by waterproof glue, and an annular fixing plate 21 is provided on the outer wall of the circular fixed tube 20 near the top. The bottom of the annular fixing plate 21 is bonded to the top of the rectangular pipe 1 by waterproof glue. The annular fixing plate 21 supports the circular fixed tube 20 and is sealed and connected to the rectangular pipe 1 by waterproof glue, which can ensure the sealing of the connection.

[0043] Furthermore, a hand wheel 26 is provided on the top of the sealing cover 22 to facilitate the staff to rotate the sealing cover 22 .

[0044] Furthermore, threaded rods 16 are provided at the top of the rectangular pipe 1 and near the four corners of the rectangular operating port 15, and mounting holes b50 for the threaded rods 16 to pass through are opened at the bottom of the sealing cover plate 5 and near the four corners. The threaded ends of the threaded rods 16 pass through the mounting holes b50 and are threadedly connected with clamping nuts 7. Through the cooperation of the threaded rods 16 and the clamping nuts 7, the sealing cover plate 5 is pressed against the top of the rectangular pipe 1. This connection structure can facilitate the staff to disassemble and assemble the sealing cover plate 5.

[0045] Furthermore, a rectangular abutment plate 51 is provided at the bottom of the sealing cover plate 5, and a frame-shaped rubber sleeve 6 is bonded to the outer side of the rectangular abutment plate 51. The outer wall of the frame-shaped rubber sleeve 6 fits tightly with the inner wall of the rectangular operating port 15 to ensure the sealing of the connection between the sealing cover plate 5 and the rectangular pipe 1. The bottom of the frame-shaped rubber sleeve 6 abuts against the top of the collecting box 4 to position the collecting box 4.

[0046] Furthermore, a frame-shaped groove 52 is provided at the bottom of the sealing cover plate 5 and at the top edge of the rectangular abutment plate 51, and a first frame-shaped rubber pad 60 is provided at the top of the frame-shaped rubber sleeve 6. The first frame-shaped rubber pad 60 is bonded to the frame-shaped groove 52, and the bottom of the first frame-shaped rubber pad 60 is tightly fitted with the top of the rectangular pipe 1, thereby further improving the sealing performance of the connection between the sealing cover plate 5 and the rectangular pipe 1.

[0047] Furthermore, a lifting rod 42 is provided between the front and rear sides of the inner wall of the collecting box 4 and near the top, so as to facilitate the staff to take the collecting box 4 upward out of the rectangular pipe 1 and the bottom box 3 .

[0048] Furthermore, a second partition 14 is provided in the rectangular pipe 1 and on the right side of the rectangular operating port 15. A rectangular through hole a140 connected to the filter screen 41 is opened on the left side of the second partition 14. The second partition 14 cooperates with the first partition 13 to position the collection box 4.

[0049] Furthermore, a second frame-shaped rubber pad 8 is embedded on the left side of the collecting box 4 and close to the outer edge of the rectangular through hole b40, and the left side of the second frame-shaped rubber pad 8 is tightly fitted with the right side of the first partition 13. A third frame-shaped rubber pad 9 is embedded on the right side of the collecting box 4 and close to the outer edge of the filter net 41, and the right side of the third frame-shaped rubber pad 9 is tightly fitted with the left side of the second partition 14, ensuring that all the descaling water in the rectangular pipe 1 passes through the collecting box 4 to avoid water being discharged to the right without being filtered.

[0050] When the central air conditioner descaling auxiliary device of this embodiment is in use, cooling water is input from the left end of the rectangular pipe 1, and multiple anode rods 25 are in contact with the cooling water circulating in the rectangular pipe 1. The anode rods 25 can consume themselves to descaling the cooling water. The large particles generated by descaling enter the collection box 4 from the U-shaped through hole 130 and the rectangular through hole b40 in sequence with the water flow. The filter screen 41 on the right side of the collection box 4 filters the large particles generated by descaling and collects the large particles in the collection box 4.

[0051] When the anode rod 25 needs to be replaced, the staff rotates the sealing cover 22 to separate the sealing cover 22 from the circular fixed tube 20, and then moves the sealing cover 22 upward, and the sealing cover 22 drives the internal threaded connecting tube 23, the threaded connecting rod 24 and the anode rod 25 to move upward synchronously, so as to take the anode rod 25 out of the rectangular pipe 1, and then rotates the threaded connecting rod 24 to move the threaded connecting rod 24 out of the internal threaded connecting tube 23, and then the threaded connecting rod 24 on the new anode rod 25 is threadedly connected to the internal threaded connecting tube 23, and finally the sealing cover 22 is threadedly connected to the circular fixed tube 20, so as to realize the replacement of the anode rod 25;

[0052] When it is necessary to clean the filtered material in the collecting box 4, the staff will remove the four clamping nuts 7, then move the sealing cover 5 upwards, so that the rectangular abutment plate 51 is removed from the rectangular operating port 15, and the sealing cover 5 is removed. Then the staff will hold the lifting rod 42 by hand and move it upwards, so that the lifting rod 42 drives the collecting box 4 to move upwards, thereby taking the collecting box 4 out of the rectangular pipe 1 and the bottom box 3. After that, the staff will pour out the filtered material in the collecting box 4 and clean the filter screen 41. Finally, the cleaned collecting box 4 is placed in the rectangular pipe 1, and the bottom of the collecting box 4 is fixed in the bottom box 3. Then the sealing cover 5 is installed at the rectangular operating port 15, and the four clamping nuts 7 are tightened to realize the cleaning and installation of the collecting box 4, which is easy to operate.

[0053] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A central air conditioner descaling auxiliary device, comprising a rectangular duct (1), characterized in that: A plurality of mounting holes a (12) arranged equidistantly from left to right are provided at the top of the rectangular pipe (1) and near the left side thereof, each of the mounting holes a (12) being provided with a descaling assembly (2), the descaling assembly (2) comprising a circular fixed pipe (20) fixedly connected to the mounting hole a (12), a detachable sealing cover (22) being threadedly connected to the top of the circular fixed pipe (20), an internally threaded connecting pipe (23) being provided at the middle of the top of the inner wall of the sealing cover (22), a threaded connecting rod (24) being internally threadedly connected to the internally threaded connecting pipe (23), an anode rod (25) being provided at the bottom end of the threaded connecting rod (24), a rectangular operating rod (25) being provided at the top of the rectangular pipe (1) and near the right side thereof. A rectangular operation opening (15) is provided at the top of the rectangular operation opening (15), a detachable sealing cover plate (5) is provided, a first partition plate (13) is provided in the rectangular duct (1) and at a position on the left side of the rectangular operation opening (15), a U-shaped through hole (130) is provided at the bottom of the left side of the first partition plate (13), a bottom box (3) is provided at the bottom of the rectangular duct (1) and directly below the rectangular operation opening (15), the bottom box (3) is connected to the rectangular duct (1), a collection box (4) is placed in the bottom box (3), a rectangular through hole b (40) connected to the U-shaped through hole (130) is provided on the left side of the collection box (4), and a filter screen (41) is provided on the right side of the collection box (4) and near the top.

2. The central air conditioner descaling auxiliary device according to claim 1, characterized in that: A water inlet mounting plate (10) is provided on the left side of the outer wall of the rectangular pipe (1), and a water outlet mounting plate (11) is provided on the right side of the outer wall of the rectangular pipe (1).

3. The central air conditioner descaling auxiliary device according to claim 1, characterized in that: The outer wall of the circular fixed tube (20) is bonded to the mounting hole a (12) by waterproof glue, and an annular fixing plate (21) is provided on the outer wall of the circular fixed tube (20) near the top, and the bottom of the annular fixing plate (21) is bonded to the top of the rectangular pipe (1) by waterproof glue.

4. The central air conditioner descaling auxiliary device according to claim 1, characterized in that: A hand wheel (26) is provided on the top of the sealing cover (22).

5. The central air conditioner descaling auxiliary device according to claim 1, characterized in that: A threaded rod (16) is provided at the top of the rectangular pipe (1) and near the four corners of the rectangular operating port (15); a mounting hole b (50) for the threaded rod (16) to pass through is provided at the bottom of the sealing cover plate (5) and near the four corners; a threaded end of the threaded rod (16) passes through the mounting hole b (50) and is threadedly connected to a clamping nut (7).

6. The central air conditioner descaling auxiliary device according to claim 1, characterized in that: A rectangular abutment plate (51) is provided at the bottom of the sealing cover plate (5), a frame-shaped rubber sleeve (6) is bonded to the outer side of the rectangular abutment plate (51), the outer wall of the frame-shaped rubber sleeve (6) is tightly fitted with the inner wall of the rectangular operating port (15), and the bottom of the frame-shaped rubber sleeve (6) is abutted against the top of the collection box (4).

7. The central air conditioner descaling auxiliary device according to claim 6, characterized in that: A frame-shaped groove (52) is provided at the bottom of the sealing cover plate (5) and at the top edge of the rectangular abutment plate (51); a first frame-shaped rubber pad (60) is provided at the top of the frame-shaped rubber sleeve (6); the first frame-shaped rubber pad (60) is bonded into the frame-shaped groove (52); and the bottom of the first frame-shaped rubber pad (60) is tightly fitted with the top of the rectangular pipe (1).

8. The central air conditioner descaling auxiliary device according to claim 1, characterized in that: A lifting rod (42) is provided between the front and rear sides of the inner wall of the collection box (4) and close to the top.

9. The central air conditioner descaling auxiliary device according to claim 1, characterized in that: A second partition plate (14) is provided in the rectangular duct (1) and at a position on the right side of the rectangular operating port (15), and a rectangular through hole a (140) communicating with the filter screen (41) is provided on the left side of the second partition plate (14).

10. The central air conditioner descaling auxiliary device according to claim 9, characterized in that: A second frame-shaped rubber pad (8) is embedded on the left side of the collection box (4) and close to the outer edge of the rectangular through hole b (40), and the left side of the second frame-shaped rubber pad (8) is tightly fitted with the right side of the first partition (13). A third frame-shaped rubber pad (9) is embedded on the right side of the collection box (4) and close to the outer edge of the filter screen (41), and the right side of the third frame-shaped rubber pad (9) is tightly fitted with the left side of the second partition (14).

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