Condensate water anti-backflow device for air conditioning unit

Abstract

The present invention relates to an anti-back-suction device for condensate water of an air-conditioning unit, belonging to the technical field of drainage of air-conditioning units. The anti-back-suction device for condensate water of an air-conditioning unit comprises a first water trap pipe and a second water trap pipe, the first water trap pipe and the second water trap pipe are sealed and connected, a plurality of cleaning mechanisms are arranged on the inner sides of the first water trap pipe and the second water trap pipe, a reset mechanism is arranged on the inner side of the second water trap pipe, a rubber rope is connected between the reset mechanism and the plurality of cleaning mechanisms, one end of the rubber rope is fixedly connected to a first air bag located on the inner side of the first water trap pipe, and the other end of the rubber rope is fixedly connected to a second air bag located on the inner side of the second water trap pipe, when the condensate water on the inner side of the first water trap pipe flows, it drives the plurality of cleaning mechanisms to slide and rotate along the inner wall of the first water trap pipe, and in the present invention, bacteria, mold and sticky masses adhered to the inner wall of the pipe can be scraped off by the sliding and rotating cleaning mechanism.

Description

Technical Field

[0001] The invention belongs to the technical field of drainage of air-conditioning units, and in particular relates to a condensate water anti-backflow device for an air-conditioning unit. Background Art

[0002] When existing air-conditioning units are running, especially in a humid environment, toxic bacteria (such as Legionella), mold (such as sugar secretions) and sticky masses (such as air precipitation and bacterial residues) are easily produced in the condensate pan and the condensate drain pipe, which can easily hinder the flow of water and cause drainage obstruction of hydraulic components, resulting in the condensate in the condensate pan being unable to be discharged. In addition, during the operation of the air-conditioning unit, negative pressure will be generated on the upper part of the condensate pan, causing the condensate to overflow the condensate pan and be sucked back into the interior of the air-conditioning unit, affecting the safe operation of the unit. Therefore, the condensate pan and the condensate drain pipe need to be cleaned.

[0003] For example, in the Chinese invention patent with the announcement number CN110500761B, entitled A drainage device for a ceiling air-conditioning unit, the invention includes: a water receiving pan, and a water pump mounted upside down above the water receiving pan; a controller for detecting the operating status of the air-conditioning unit and controlling the rotation direction of the water pump when the air-conditioning unit is in cooling operation to drain the condensed water in the water receiving pan and self-clean the water pump. Although the above-mentioned prior art can clean the water receiving pan and the water pump, generally bacteria (such as Legionella, etc.), mold (such as sugar secretions) and sticky masses (such as air precipitation and bacterial residues) adhere to the inner wall of the pipe relatively firmly, and water flushing cannot effectively clean the bacteria, mold and sticky masses. Summary of the invention

[0004] The purpose of the present invention is to provide an air-conditioning unit condensate water anti-backflow device with a simple structure and reasonable design in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A device for preventing back-suction of condensate water of an air-conditioning unit comprises a first water trap pipe and a second water trap pipe, wherein the first water trap pipe and the second water trap pipe are sealed and connected, a plurality of cleaning mechanisms are arranged on the inner sides of the first water trap pipe and the second water trap pipe, a reset mechanism is arranged on the inner side of the second water trap pipe, a rubber rope is connected between the reset mechanism and the plurality of cleaning mechanisms, one end of the rubber rope is fixedly connected to a first air bag located on the inner side of the first water trap pipe, and the other end of the rubber rope is fixedly connected to a second air bag located on the inner side of the second water trap pipe, and when the condensate water inside the first water trap pipe flows, the plurality of cleaning mechanisms are driven to slide and rotate along the inner wall of the first water trap pipe.

[0007] As a further optimization scheme of the present invention, the cleaning mechanism includes a first sliding rod fixedly connected between two adjacent rubber ropes, limit plates are fixedly arranged at both ends of the first sliding rod, a sliding sleeve is slidingly provided on the first sliding rod, a turntable is rotatably provided on the outer side of the sliding sleeve and is in contact with the inner wall of the first water trap pipe, a plurality of arc grooves equidistantly arranged around the circumference are provided on the turntable, and a first return spring mounted on the first sliding rod is fixed between the sliding sleeve and the limit plate.

[0008] As a further optimization solution of the present invention, cutters are fixedly arranged on the inner sides of the plurality of arc-shaped grooves.

[0009] As a further optimization solution of the present invention, a plurality of arc-shaped transmission plates located on one side of the arc-shaped groove are fixedly provided on one side of the turntable.

[0010] As a further optimization scheme of the present invention, the reset mechanism includes a second annular magnet fixedly arranged on the inner wall of the second water trap pipe, a second sliding rod located on the inner side of the second water trap pipe is fixedly connected between two adjacent rubber ropes, a top plate is fixedly arranged at one end of the second sliding rod, a second reset spring mounted on the outside of the second sliding rod is fixedly arranged on one side of the top plate, a slip ring slidably mounted on the outside of the second sliding rod is fixedly arranged at one end of the second reset spring, a plurality of connecting rods are fixedly arranged on the circumference of one side of the slip ring, and a first annular magnet which is attracted and cooperated with the second annular magnet is commonly fixedly arranged at one end of the plurality of connecting rods.

[0011] As a further optimization scheme of the present invention, a sealing rubber plate cooperating with the second annular magnet is fixedly provided at one end of the second sliding rod away from the top plate. The sealing rubber plate adopts a disc structure and has a diameter larger than the inner diameter of the second annular magnet.

[0012] As a further optimization scheme of the present invention, the first water trap pipe adopts a "Z"-shaped structure, and the second water trap pipe adopts an inverted "U"-shaped structure, and the upper end of the "Z"-shaped structure of the first water trap pipe is higher than the upper end of the inverted "U"-shaped structure of the second water trap pipe.

[0013] As a further optimization scheme of the present invention, one end of the first water trap pipe is a water inlet end, one end of the second water trap pipe is a water outlet end, the first airbag is located in the middle of the "Z"-shaped structure of the first water trap pipe, the inner diameter of the first water trap pipe is smaller than the inner diameter of the second water trap pipe, the diameter of the first airbag is smaller than the inner diameter of the first water trap pipe, and the diameter of the second airbag is equal to the inner diameter of the second water trap pipe.

[0014] As a further optimization solution of the present invention, the water inlet end of the first water trap is fixedly connected to a condensate water tray, and a buffer mechanism is provided on one side of the first water trap close to the water inlet end.

[0015] As a further optimization scheme of the present invention, the buffer mechanism includes a buffer tube fixedly connected to the first water trap pipe near the water inlet end, the upper end of the buffer tube is sealed with a rubber membrane, and the edge of the rubber membrane is provided with a fixing ring for fixing the rubber membrane to the buffer tube.

[0016] The beneficial effects of the present invention are:

[0017] 1. In the present invention, when the condensed water in the condensed water tray exceeds a certain height, the water pressure will push the sealing rubber plate, and then pull the second sliding rod to slide, so that the sealing rubber plate is separated from the second annular magnet, so that the inner channel of the second annular magnet is opened, and the condensed water can enter the first water trap pipe through the condensed water tray. The flowing condensed water passes through the arc groove on the turntable, which can drive the turntable to rotate. When the turntable rotates, it will push the sliding sleeve to rotate on the first sliding rod, and finally the turntable can slide while rotating inside the first water trap pipe and the second water trap pipe. Because the edge of the turntable By fitting on the inner wall of the first water trap pipe and the second water trap pipe, the bacteria, mold and sticky mass adhered to the inner wall of the first water trap pipe and the second water trap pipe can be scraped off, so as to clean the inner wall of the first water trap pipe and the second water trap pipe, and prevent the bacteria, mold and sticky mass from clogging the pipe. Moreover, by the cutter arranged on the inner side of the arc groove, the cutter can be driven to rotate when the turntable rotates, so that the bacteria, mold and sticky mass passing through the arc groove can be cut off, thereby improving the flow effect of the bacteria, mold and sticky mass, and further improving the discharge efficiency of the bacteria, mold and sticky mass.

[0018] 2. In the present invention, the second return spring can make the second slide bar slide only toward the water outlet end of the second water trap pipe in a natural state and cannot slide in the opposite direction, so as to prevent the air-conditioning unit from generating negative pressure in the condensate water pan, causing the condensate inside the first water trap pipe and the second water trap pipe to be sucked back, causing the water in the condensate water pan to overflow and affect the safe use of the air-conditioning unit. In addition, the negative pressure generated in the condensate water pan can be buffered and compensated by the rubber membrane, so that the rubber membrane expands toward the inside of the buffer tube, preventing the negative pressure generated in the condensate water pan from causing the first water trap pipe and the second water trap pipe to be sucked and deformed, thereby preventing the first water trap pipe and the second water trap pipe from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a first internal overall structure of the present invention;

[0020] Figure 2 is a second internal overall structure schematic diagram of the present invention;

[0021] Figure 3 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 4It is a first overall structural schematic diagram of the cleaning mechanism of the present invention;

[0023] Figure 5 It is a second overall structural schematic diagram of the cleaning mechanism of the present invention;

[0024] Figure 6 The present invention Figure 1 Enlarged view of point A in the middle;

[0025] Figure 7 The present invention Figure 1 Enlarged view of point B in the middle;

[0026] Figure 8 The present invention Figure 2 Enlarged view of point C in the middle;

[0027] Fig. 9 The present invention Figure 2 Enlarged view of point D in the middle;

[0028] Fig.10 The present invention Figure 3 Enlarged view of point E in the middle.

[0029] In the figure: 1. first water trap; 101. water inlet end; 2. second water trap; 201. water outlet end; 3. rubber rope; 4. first air bag; 5. second air bag; 6. cleaning mechanism; 601. first slide bar; 602. sleeve; 603. limit plate; 604. turntable; 605. arc groove; 606. cutter; 607. arc transmission plate; 608. first return spring; 7. return mechanism; 701. second slide bar; 702. top plate; 703. second return spring; 704. slip ring; 705. connecting rod; 706. first annular magnet; 707. second annular magnet; 708. sealing rubber plate; 8. buffer mechanism; 801. buffer tube; 802. fixing ring; 803. rubber membrane; 9. condensate tray. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0031] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, a condensate back-suction prevention device for an air-conditioning unit comprises a first water trap 1 and a second water trap 2, wherein the inner diameter of the first water trap 1 is smaller than the inner diameter of the second water trap 2, the first water trap 1 is sealed and connected to the second water trap 2, one end of the first water trap 1 is a water inlet end 101, one end of the second water trap 2 is a water outlet end 201, the first water trap 1 adopts a "Z"-shaped structure, and the second water trap 2 adopts an inverted "U"-shaped structure, the upper end of the "Z"-shaped structure of the first water trap 1 is higher than the upper end of the inverted "U"-shaped structure of the second water trap 2, and a plurality of cleaning mechanisms 6 are arranged on the inner sides of the first water trap 1 and the second water trap 2. In this embodiment, three cleaning mechanisms 6 are arranged, wherein two cleaning mechanisms 6 are arranged on the first water trap 1 and the second water trap 2, respectively. 1, a vertical section of the "Z"-shaped structure and a bottom horizontal section, another cleaning mechanism 6 is arranged on a vertical section on one side of the inverted "U"-shaped structure of the second water trap pipe 2, the specific number of cleaning mechanisms 6 can be flexibly selected according to the length of the first water trap pipe 1 and the second water trap pipe 2, the inner diameter of the first water trap pipe 1 is smaller than the inner diameter of the second water trap pipe 2, so that the three cleaning mechanisms 6 can be easily slid from the inner side of the first water trap pipe 1 into the inner side of the second water trap pipe 2, so as to facilitate installation and disassembly, the cleaning mechanism 6 includes a first sliding rod 601 fixedly connected between two adjacent rubber ropes 3, and limiting plates 603 are fixedly arranged at both ends of the first sliding rod 601, and a sliding sleeve 602 is provided on the first sliding rod 601, and the limiting plate 603 can prevent the sliding sleeve 602 from sliding out of the first The sliding rod 601 slides out, and a rotating disk 604 is arranged on the outer side of the sliding sleeve 602 to fit with the inner wall of the first water trap pipe 1. Blades can be arranged on the edges of the rotating disk 604 on both sides, so that bacteria, mold and sticky masses on the inner walls of the first water trap pipe 1 and the second water trap pipe 2 can be scraped off more easily. A plurality of arc grooves 605 equidistantly arranged on the circumference are provided on the rotating disk 604. A first return spring 608 sleeved on the first sliding rod 601 is fixed between the sliding sleeve 602 and the limiting plate 603. The first return spring 608 can push the sliding sleeve 602 to return along the first sliding rod 601, thereby restoring the rotating disk 604 on the outer side of the sliding sleeve 602 to its initial state, so as to facilitate the next cleaning use. The arc groove 605 adopts a 1 / 6 segment circular arc segment, and the rotating disk 604 is provided with a plurality of arc grooves 605 equidistantly arranged on the circumference. A plurality of arc-shaped transmission plates 607 located on one side of the arc-shaped groove 605 are fixedly provided on one side of the disk 604. In order to prevent the cleaning mechanism 6 from falling to the bottom of the first water trap 1 and the second water trap 2 due to gravity, the first slide bar 601, the rotating disk 604, the sliding sleeve 602, the limit plate 603 and the arc-shaped transmission plate 607 are all made of plastic material. The arc-shaped transmission plate 607 is arranged on the water-facing side of the rotating disk 604. The shape of the arc-shaped transmission plate 607 is consistent with the arc-shaped groove 605. Cutters 606 are fixedly provided on the inner sides of the plurality of arc-shaped grooves 605. The shape of the cutters 606 is consistent with the arc-shaped groove 605. The cutters 606 are arranged on the convex surface of the inner side wall of the arc-shaped groove 605, so as to cut off bacteria, molds and sticky masses in the condensed water and improve the fluidity of the condensed water.When in use, when condensed water at one end of the first water trap pipe 1 flows in from the water inlet end 101, the condensed water can flow through the arc groove 605 on the turntable 604 under the guidance of the arc transmission plate 607, and the turntable 604 can be driven to rotate. When the condensed water pushes the turntable 604, the condensed water hits the turntable 604, which causes the turntable 604 to rotate on the outside of the sliding sleeve 602. The turntable 604 can push the sliding sleeve 602 to slide on the first slide bar 601, thereby driving the turntable 604 to rotate along the first slide bar 601 and sliding along the first slide bar 601, so that the turntable 604 rotates and slides on the inner side of the first water trap pipe 1, so that the bacteria, mold and sticky mass on the inner wall of the first water trap pipe 1 are scraped off, and the bacteria, mold and sticky mass are prevented from adhering to the inner wall of the pipe and affecting the flow of condensed water.

[0032] like Figure 1 , Figure 2 , Figure 7 , Fig. 9As shown, a reset mechanism 7 is provided on the inner side of the second water trap pipe 2, and the reset mechanism 7 includes a second annular magnet 707 fixedly provided on the inner side wall of the second water trap pipe 2, a second slide bar 701 located on the inner side of the second water trap pipe 2 is fixedly connected between two adjacent rubber ropes 3, a top plate 702 is fixedly provided on one end of the second slide bar 701, a second reset spring 703 sleeved on the outer side of the second slide bar 701 is fixedly provided on one side of the top plate 702, a slip ring 704 slidably sleeved on the outer side of the second slide bar 701 is fixedly provided on one end of the second reset spring 703, a plurality of connecting rods 705 are fixedly provided on the circumference of one side of the slip ring 704, and a second connecting rod 705 is fixedly provided on one end of the plurality of connecting rods 705. The second annular magnet 706 is provided with a sealing rubber plate 708 which cooperates with the second annular magnet 707. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The sealing rubber plate 708 is provided with a sealing surface. The negative pressure generated in 9 causes the first water trap pipe 1 and the second water trap pipe 2 to be sucked and deformed, thereby preventing the first water trap pipe 1 and the second water trap pipe 2 from being damaged. Both ends of the second slide bar 701 are fixedly connected with rubber ropes 3. The rubber rope 3 at one end of the second slide bar 701 is fixedly connected to one end of the first slide bar 601. Multiple first slide bars 601 are fixedly connected by rubber ropes 3. Three cleaning mechanisms 6 and a reset mechanism 7 are connected together by multiple rubber ropes 3 to form a whole, which is easy to install and disassemble, and are interconnected to improve the cleaning effect. When in use, when the condensed water in the condensed water tray 9 exceeds a certain height, the water pressure will push the sealing rubber plate 708, thereby pulling the second slide bar 701 toward the sealing rubber plate 708. The second ring magnet 707 is opened by the second sliding bar 701, and the second ring magnet 707 is opened by the second sliding bar 701. When the water pressure is reduced, that is, when the height of the condensed water in the condensed water tray 9 is lower than a certain range, the second return spring 703 will push the top plate 702 away from the second ring magnet 707, and the sealing rubber plate 708 at one end of the second sliding bar 701 can be pulled to fit closely with one side of the second ring magnet 707, so as to re-block the flow channel inside the second ring magnet 707. When the sealing rubber plate 708 blocks the flow channel inside the second ring magnet 707,At this time, one side of the sealing rubber plate 708 is attached to one side of the second annular magnet 707 to prevent the sealing rubber plate 708 from sliding too much, so that the second water trap 2 is sealed.

[0033] like Figure 1 , Figure 2 As shown, one end of the rubber rope 3 is fixedly connected to the first air bag 4 located inside the first water trap pipe 1. The buoyancy of the first air bag 4 can make the rubber rope 3 straight, so that the cleaning mechanism 6 is parallel to the inner wall of the first water trap pipe 1 and the second water trap pipe 2, which is convenient for cleaning bacteria, mold and sticky balls. The diameter of the first air bag 4 is smaller than the inner diameter of the first water trap pipe 1. The first air bag 4 is located in the middle of the "Z"-shaped structure of the first water trap pipe 1, that is, the first air bag 4 is located in the vertical direction of the first water trap pipe 1. The other end of the rubber rope 3 is fixedly connected to the second air bag 5 located inside the second water trap pipe 2. The diameter of the second air bag 5 is equal to the inner diameter of the second water trap pipe 2. The second air bag 5 is located inside the water outlet end 201 of the inverted "U"-shaped structure of the second water trap pipe 2. When in use, When the condensed water on the inside of the second water trap 2 hits the second air bag 5, the second air bag 5 will slide out from the water outlet end 201, so that the condensed water on the inside of the second water trap 2 flows out from the water outlet end 201, and the condensed water hits the second air bag 5, which can also drive the rubber rope 3 to slide from the inside of the second water trap 2 to the side of the water outlet end 201, and then assist the water pressure to open the sealing rubber plate 708 from one side of the second annular magnet 707. In addition, since the three cleaning mechanisms 6 are connected by the rubber rope 3, the three cleaning mechanisms 6 can also be pulled to slide on the inside of the first water trap 1 and the second water trap 2, thereby increasing the cleaning length of the three cleaning mechanisms 6 on the inside of the first water trap 1 and the second water trap 2, and further improving the cleaning effect and efficiency of bacteria, mold and sticky masses.

[0034] like Figure 3 , Fig.10As shown, the water inlet end 101 of the first water trap pipe 1 is fixedly connected to the condensate pan 9, and an air conditioning unit (not shown in the figure) is arranged on the upper side of the condensate pan 9. During use, the air conditioning unit will cause negative pressure to be generated inside the condensate pan 9. A buffer mechanism 8 is arranged on the side of the first water trap pipe 1 close to the water inlet end 101. The buffer mechanism 8 includes a buffer tube 801 fixedly connected to the side of the first water trap pipe 1 close to the water inlet end 101. A rubber film 803 is sealed on the upper end of the buffer tube 801. A fixing ring 802 is arranged on the edge of the rubber film 803 to fix the rubber film 803 on the buffer tube 801. The upper side of the fixed ring 802 is fixed to the upper opening of the buffer tube 801 by screws. During use, when the air-conditioning unit generates negative pressure in the condensate pan, the rubber membrane 803 at the upper end of the buffer tube 801 will expand inward, thereby buffering the negative pressure and preventing the negative pressure generated in the condensate pan 9 from causing the first water trap 1 and the second water trap 2 to be deflated and deformed, thereby avoiding the condensed water in the first water trap 1 and the second water trap 2 from being sucked back, causing the condensed water in the condensate pan 9 to overflow, affecting the safety of the air-conditioning unit and preventing the first water trap 1 and the second water trap 2 from being damaged.

[0035] It should be noted that, when the condensate anti-backflow device of the air-conditioning unit is in use, when the condensate in the condensate pan 9 exceeds a certain height, the water pressure will push the sealing rubber plate 708, thereby pulling the second slide bar 701 to slide to one side of the sealing rubber plate 708, so that the sealing rubber plate 708 is separated from the second annular magnet 707, so that the inner channel of the second annular magnet 707 is opened, and at the same time, the second slide bar 701 pulls the top plate 702 closer to the second annular magnet 707, so that the second return spring 703 is compressed, and the sealing rubber plate 708 is released. The condensed water in the condensed water pan 9 flows from the water inlet end 101 of the first water trap pipe 1 into the second water trap pipe 2, and finally flows out through the water outlet end 201 at one end of the second water trap pipe 2. When the condensed water in the first water trap pipe 1 flows, a part of the condensed water hits the rotating disk 604, which causes the rotating disk 604 to drive the sliding sleeve 602 to rotate on the first sliding rod 601. The other part of the condensed water flows through the arc groove 605 on the rotating disk 604 under the guidance of the arc transmission plate 607, so that the sliding sleeve 602 drives the rotating disk The rotating disk 604 can rotate along the first slide bar 601 and can also slide along the first slide bar 601, so that the rotating disk 604 rotates and slides inside the first water trap pipe 1, and the bacteria, mold and sticky mass on the inner wall of the first water trap pipe 1 and the second water trap pipe 2 can be scraped off by the edge of the rotating disk 604, and the cutting knife 606 inside the arc groove 605 is driven to rotate by the rotation of the rotating disk 604, so that the bacteria, mold and sticky mass flowing through the arc groove 605 are cut off, and the condensed water impacts the second airbag 5. When the rubber rope 3 is pulled, the rubber rope 3 can also be driven to slide on the inner side of the second water trap pipe 2 toward the water outlet end 201, thereby assisting the water pressure to open the sealing rubber plate 708 from one side of the second annular magnet 707. In addition, since the three cleaning mechanisms 6 are connected by the rubber rope 3, the three cleaning mechanisms 6 can also be pulled to slide on the inner side of the first water trap pipe 1 and the second water trap pipe 2, thereby increasing the cleaning length of the three cleaning mechanisms 6 on the inner side of the first water trap pipe 1 and the second water trap pipe 2, and further improving the cleaning effect and efficiency of bacteria, mold and sticky masses.

[0036] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A condensate back-inhalation prevention device for an air-conditioning unit, comprising a first water trap pipe (1) and a second water trap pipe (2), characterized in that: The first water trap pipe (1) is sealed and connected to the second water trap pipe (2); a plurality of cleaning mechanisms (6) are arranged on the inner sides of the first water trap pipe (1) and the second water trap pipe (2); a reset mechanism (7) is arranged on the inner side of the second water trap pipe (2); a rubber rope (3) is connected between the reset mechanism (7) and the plurality of cleaning mechanisms (6); one end of the rubber rope (3) is fixedly connected to a first air bag (4) located on the inner side of the first water trap pipe (1); the other end of the rubber rope (3) is fixedly connected to a second air bag (5) located on the inner side of the second water trap pipe (2); when condensed water on the inner side of the first water trap pipe (1) flows, the plurality of cleaning mechanisms (6) are driven to slide and rotate along the inner wall of the first water trap pipe (1).

2. The device for preventing back-suction of condensed water of an air-conditioning unit according to claim 1, characterized in that: The cleaning mechanism (6) comprises a first sliding rod (601) fixedly connected between two adjacent rubber ropes (3), limit plates (603) being fixedly arranged at both ends of the first sliding rod (601), a sliding sleeve (602) being slidably sleeved on the first sliding rod (601), a rotating disk (604) being rotatably arranged on the outer side of the sliding sleeve (602) and being in contact with the inner wall of the first water trap (1), a plurality of arc grooves (605) being equidistantly arranged around the circumference of the rotating disk (604), and a first return spring (608) sleeved on the first sliding rod (601) being fixedly arranged between the sliding sleeve (602) and the limit plates (603).

3. The device for preventing back-suction of condensed water of an air-conditioning unit according to claim 2, characterized in that: A cutting knife (606) is fixedly arranged on the inner side of each of the arc-shaped grooves (605).

4. The device for preventing back-suction of condensed water of an air-conditioning unit according to claim 3, characterized in that: A plurality of arc-shaped transmission plates (607) located on one side of the arc-shaped groove (605) are fixedly arranged on one side of the rotating disk (604).

5. The device for preventing back-suction of condensed water of an air-conditioning unit according to claim 4, characterized in that: The reset mechanism (7) comprises a second annular magnet (707) fixedly arranged on the inner side wall of the second water trap pipe (2); a second sliding rod (701) located on the inner side of the second water trap pipe (2) is fixedly connected between two adjacent rubber ropes (3); a top plate (702) is fixedly arranged on one end of the second sliding rod (701); a second reset spring (703) sleeved on the outer side of the second sliding rod (701) is fixedly arranged on one side of the top plate (702); a slip ring (704) slidably sleeved on the outer side of the second sliding rod (701) is fixedly arranged on one end of the second reset spring (703); a plurality of connecting rods (705) are fixedly arranged on the circumference of one side of the slip ring (704); and a first annular magnet (706) that attracts and cooperates with the second annular magnet (707) is fixedly arranged on one end of the plurality of connecting rods (705).

6. The device for preventing back-suction of condensed water of an air-conditioning unit according to claim 5, characterized in that: A sealing rubber plate (708) that cooperates with the second annular magnet (707) is fixedly provided at one end of the second sliding rod (701) away from the top plate (702); the sealing rubber plate (708) has a disc structure and a diameter greater than the inner diameter of the second annular magnet (707).

7. The device for preventing back-suction of condensed water of an air-conditioning unit according to claim 1, characterized in that: The first water trap pipe (1) adopts a "Z"-shaped structure, and the second water trap pipe (2) adopts an inverted "U"-shaped structure. The upper end of the "Z"-shaped structure of the first water trap pipe (1) is higher than the upper end of the inverted "U"-shaped structure of the second water trap pipe (2).

8. The device for preventing back-suction of condensed water of an air-conditioning unit according to claim 7, characterized in that: One end of the first water trap pipe (1) is a water inlet end (101), one end of the second water trap pipe (2) is a water outlet end (201), the first air bag (4) is located in the middle of the "Z"-shaped structure of the first water trap pipe (1), the inner diameter of the first water trap pipe (1) is smaller than the inner diameter of the second water trap pipe (2), the diameter of the first air bag (4) is smaller than the inner diameter of the first water trap pipe (1), and the diameter of the second air bag (5) is equal to the inner diameter of the second water trap pipe (2).

9. The device for preventing back-suction of condensed water from an air-conditioning unit according to any one of claims 1 to 8, characterized in that: The water inlet end (101) of the first water trap pipe (1) is fixedly connected to a condensate water tray (9), and a buffer mechanism (8) is provided on one side of the first water trap pipe (1) close to the water inlet end (101).

10. The device for preventing back-suction of condensed water of an air-conditioning unit according to claim 9, characterized in that: The buffer mechanism (8) comprises a buffer tube (801) fixedly connected to a side of the first water trap tube (1) close to the water inlet end (101), the upper end of the buffer tube (801) being sealed with a rubber membrane (803), and the edge of the rubber membrane (803) being provided with a fixing ring (802) for fixing the rubber membrane (803) to the buffer tube (801).

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