Pipe connecting device, air conditioner indoor unit and air conditioner

Abstract

The present invention provides a pipe connection device, an air conditioner indoor unit, and an air conditioner. The pipe connection device includes: an upper connecting pipe, an outer shell, and a lower connecting pipe. The upper end of the upper connecting pipe is connected to the condensate pipe of the air conditioner. The outer shell is connected between the upper connecting pipe and the lower connecting pipe. The upper connecting pipe is connected to the interior of the outer shell through an upper connecting pipe water outlet. The lower connecting pipe is connected to the interior of the outer shell through a lower connecting pipe water outlet. The height of the upper connecting pipe water outlet is lower than that of the lower connecting pipe water outlet, so that the internal cavity of the outer shell forms a water storage chamber capable of storing water. When the water level in the water storage chamber is higher than the upper connecting pipe water outlet, it can form a liquid seal on the interior of the upper connecting pipe. According to the present invention, gas can be prevented from entering the interior of the air conditioner, thereby effectively solving the problem of backflow caused by the lower connecting pipe sucking in dirty air due to internal negative pressure when the air conditioner is started.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline connection, and in particular to a pipeline connection device, an air conditioner indoor unit and an air conditioner. Background Art

[0002] Conventional air conditioners generate condensate during operation, which is typically drained outdoors through a drainpipe. Because some older buildings lack dedicated air conditioner drainage branches, some air conditioner drain outlets are directly connected to sewage pipes. The negative pressure created when the air conditioner is turned on can draw corrosive and odorous gases from the sewage pipe into the air duct, or cause odorous gases, which are lighter than air, to rise through the drainpipe into the air conditioner, causing gas backflow. These gases can corrode the copper tubes on the evaporator, shortening the air conditioner's lifespan. Furthermore, if these gases enter the air-conditioned room through the air outlet, they can pose a health risk.

[0003] Existing patent CN105371454A discloses a connection assembly that divides the inner cavity into two chambers through a structure. The upper connecting pipe and the lower connecting pipe are connected to different chambers respectively, so that the gas is not sucked into the chamber when the pressure is negative. However, when the pressure is negative inside, the gas will still enter the first connecting pipe through the gap, causing the phenomenon of dirty gas backflow. (It cannot form a liquid seal effect) and the connection device consists of two parts: an upper connection port and a lower connection port, which are fastened together by a buckle and a tongue. The connection device requires two sets of molds, and because the buckle and tongue are set at the bottom, the assembly state cannot be seen, and it is easy to fail due to improper fastening.

[0004] Since the drain pipe outlet of the air-conditioning indoor unit in the prior art is directly connected to the sewage pipe, the negative pressure formed at the moment the air-conditioning is turned on will suck the corrosive and odorous gases in the sewage pipe into the air-conditioning duct, or the odorous gases with a density lighter than air will rise along the drain pipe into the interior of the air-conditioning unit, resulting in technical problems such as gas backflow. Therefore, the present invention studies and designs a pipe connection device, an air-conditioning indoor unit and an air-conditioner. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the drainage pipe of the air-conditioning indoor unit is connected to the sewage pipe, resulting in the backflow of sewage when the internal negative pressure occurs, thereby providing a pipe connection device, an air-conditioning indoor unit and an air conditioner.

[0006] In order to solve the above problems, the present invention provides a pipeline connecting device, which includes:

[0007] An upper connecting pipe, an outer shell and a lower connecting pipe, the upper end of the upper connecting pipe is connected to the condensation water pipe of the air conditioner, the outer shell is connected between the upper connecting pipe and the lower connecting pipe, the upper connecting pipe is connected to the interior of the outer shell through the upper connecting pipe water outlet, the lower connecting pipe is connected to the interior of the outer shell through the lower connecting pipe water outlet, and the height of the upper connecting pipe water outlet is lower than the height of the lower connecting pipe water outlet, so that the internal cavity of the outer shell is formed into a water storage cavity that can store water, and the water level in the water storage cavity can form a liquid seal on the interior of the upper connecting pipe when it is higher than the upper connecting pipe water outlet.

[0008] In some embodiments,

[0009] The outer shell is located on the outer periphery of the upper connecting pipe, the water outlet of the upper connecting pipe is located on the upper connecting pipe and penetrates the inner and outer walls thereof, so as to be able to guide the water in the upper connecting pipe to the water storage chamber, at least part of the structure of the lower connecting pipe is located in the outer shell, and the water outlet of the lower connecting pipe is arranged on the lower connecting pipe and penetrates the inner and outer walls thereof, so as to be able to guide the water in the water storage chamber to the lower connecting pipe.

[0010] In some embodiments,

[0011] The outer shell and the upper connecting pipe share a bottom, and the bottom of the outer shell and the upper connecting pipe is a sealing structure. The vertical height between the water outlet of the upper connecting pipe and the sealing structure is H1, the height between the water outlet of the lower connecting pipe and the sealing structure is H2, and H2>H1.

[0012] In some embodiments,

[0013] The lower connecting pipe includes a first pipe wall, a second pipe wall and a third pipe wall. The first pipe wall is located inside the shell, the first pipe wall is located inside the shell, and the second pipe wall is located outside the shell. The first pipe wall and the third pipe wall are connected at a first end. One end of the shell wall of the shell is also connected to the lower connecting pipe at the first end. The second pipe wall and the third pipe wall are connected at a second end. The other end of the shell wall of the shell is also connected to the lower connecting pipe at the second end. The lower connecting pipe water outlet is opened on the first pipe wall and / or the lower connecting pipe water outlet is opened on the second pipe wall. The first pipe wall and the second pipe wall are arranged opposite to each other.

[0014] In some embodiments,

[0015] The other end of the first tube wall and the other end of the second tube wall are connected through a fourth tube wall, the fourth tube wall is in contact with the outer wall of the upper connecting tube, and the fourth tube wall is arranged opposite to the third tube wall; or, the other end of the first tube wall is in contact with the outer wall of the upper connecting tube, the other end of the second tube wall is in contact with the outer wall of the upper connecting tube, and the third tube wall is opposite to the outer wall of the upper connecting tube, and the first tube wall, the second tube wall, the third tube wall and the outer wall of the upper connecting tube enclose at least part of the internal space of the lower connecting tube.

[0016] In some embodiments,

[0017] In the axial projection plane, the first tube wall, the second tube wall and the third tube wall form an arc segment structure, the tube wall of the outer shell is also an arc segment structure extending from the first end to the second end, and the upper connecting tube is a circular tube structure with a full circumference; when a fourth tube wall is also included: the fourth tube wall is also an arc segment structure, and the fourth tube wall and the upper connecting tube are formed as one piece.

[0018] In some embodiments,

[0019] A lower connecting pipe vent hole penetrating the inner and outer walls is provided on the third tube wall of the lower connecting pipe. The lower connecting pipe vent hole is arranged relative to the lower end of the lower connecting pipe and close to the upper end of the lower connecting pipe.

[0020] In some embodiments,

[0021] The bottom inner wall of the upper connecting pipe is also provided with a limiting rib extending upward, the limiting rib can be connected with and limited by the bottom of the condensation water pipe, and the height of the limiting rib is higher than the bottom surface height of the water outlet of the upper connecting pipe.

[0022] In some embodiments,

[0023] The upper end of the lower connecting pipe is flush with the upper end of the housing, and / or the upper end of the lower connecting pipe is closed or open; and / or,

[0024] The lower end of the lower connecting pipe extends downward from the bottom of the upper connecting pipe by a preset length, and the water outlet of the lower connecting pipe extends downward from the upper end of the lower connecting pipe by a preset length.

[0025] In some embodiments,

[0026] The upper portion of the shell is an open structure or is sealed with a cover, and the height of the shell is smaller than the height of the upper connecting pipe.

[0027] In some embodiments,

[0028] The central axis of the upper connecting pipe does not coincide with the central axis of the lower connecting pipe, but is eccentrically staggered; and / or,

[0029] The upper connecting pipe, the outer shell and the lower connecting pipe are an integrally formed structure.

[0030] The present invention also provides an air-conditioning indoor unit, which includes the aforementioned pipe connecting device.

[0031] The present invention also provides an air conditioner, which includes the aforementioned air conditioner indoor unit.

[0032] The pipe connection device, air conditioner indoor unit and air conditioner provided by the present invention have the following beneficial effects:

[0033] 1. The present invention provides a connection structure of an upper connecting pipe, a shell and a lower connecting pipe, and connects the shell between the upper connecting pipe and the lower connecting pipe, so that the upper connecting pipe is connected to the shell, and the lower connecting pipe is connected to the shell. The upper connecting pipe water outlet provided on the upper connecting pipe can discharge condensed water in the upper connecting pipe into the water storage chamber inside the shell, and when the water level in the water storage chamber is higher than the upper connecting pipe water outlet, a liquid seal can be effectively formed inside the upper connecting pipe (a height difference is designed between the water outlet hole of the upper connecting pipe and the water outlet hole of the lower connecting pipe, and a liquid seal can be achieved during the use of the air conditioner). When the air conditioner is started, due to the negative pressure inside the air conditioner, the dirty air can only be sucked into the lower connecting pipe at most and is sealed by the water in the water storage chamber, and will not enter the upper connecting pipe, thereby preventing gas from entering the interior of the air conditioner, thereby effectively solving the problem of backflow caused by the lower connecting pipe sucking in dirty air due to the internal negative pressure when the air conditioner is started;

[0034] 2. The present invention also utilizes a lower connecting pipe vent provided on the third wall of the lower connecting pipe (located outside the housing) to discharge contaminated air drawn into the lower connecting pipe through the vent, further preventing contaminated air from flowing back into the upper connecting pipe and subsequently entering the interior of the air conditioner. In particular, when the air conditioner is not used for an extended period and the liquid level in the connecting pipe decreases and a liquid seal cannot be achieved, the structural separation between the lower connecting pipe and the lower connecting pipe vent provided on the upper portion of the lower connecting pipe communicates with the outside. This allows light-density odorous gases in the sewage pipe to rise through the lower connecting pipe and dissipate directly through the opening to the outside.

[0035] 3. The present invention also arranges the upper connecting pipe, the outer shell and the lower connecting pipe to be integrally molded, preferably integrally injection molded, and only needs to open a set of molds to complete the injection molding. It is simple to use, and only needs to insert the drain pipe into the upper connecting port and the lower connecting port into the drain pipe or sewer. It solves the problem that the existing connecting device requires two sets of molds to form, resulting in low assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1It is a three-dimensional structural diagram of the pipeline connection device of the present invention;

[0037] Figure 2 yes Figure 1 A longitudinal sectional structural diagram of the pipe connection device;

[0038] Figure 3 yes Figure 1 Structural diagram of the pipe connection device in direction A;

[0039] Figure 4 yes Figure 3 Cross-sectional structure diagram of the middle BB section;

[0040] Figure 5 yes Figure 1 The structural diagram of the pipe connection device in the B direction;

[0041] Figure 6 yes Figure 5 Cross-sectional structure diagram of the AA section.

[0042] The accompanying drawings are:

[0043] 1. Upper connecting pipe; 2. Outer shell; 3. Lower connecting pipe; 4. Water outlet of upper connecting pipe; 5. Water outlet of lower connecting pipe; 6. Water storage chamber; 7. First pipe wall; 8. Second pipe wall; 9. Third pipe wall; 10. Fourth pipe wall; 11. First end; 12. Second end; 13. Limiting rib; 14. Vent hole of lower connecting pipe. DETAILED DESCRIPTION

[0044] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0047] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0048] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0049] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0050] like Figure 1-6As shown, the present invention provides a pipeline connecting device, which includes:

[0051] An upper connecting pipe 1, an outer shell 2 and a lower connecting pipe 3, the upper end of the upper connecting pipe 1 is connected to the condensation water pipe of the air conditioner, the outer shell 2 is connected between the upper connecting pipe 1 and the lower connecting pipe 3, the upper connecting pipe 1 is connected to the interior of the outer shell 2 through the upper connecting pipe water outlet 4, the lower connecting pipe 3 is connected to the interior of the outer shell 2 through the lower connecting pipe water outlet 5, and the height of the upper connecting pipe water outlet 4 is lower than the height of the lower connecting pipe water outlet 5, so that the internal cavity of the outer shell 2 is formed into a water storage chamber 6 that can store water, and the water level in the water storage chamber 6 can form a liquid seal on the interior of the upper connecting pipe 1 when it is higher than the upper connecting pipe water outlet 4.

[0052] The present invention provides a connecting structure for an upper connecting pipe, an outer shell and a lower connecting pipe, and connects the outer shell between the upper connecting pipe and the lower connecting pipe, so that the upper connecting pipe is connected to the outer shell, and the lower connecting pipe is connected to the outer shell. The upper connecting pipe water outlet provided on the upper connecting pipe can discharge condensed water in the upper connecting pipe into the water storage chamber inside the outer shell, and when the water level in the water storage chamber is higher than the upper connecting pipe water outlet, a liquid seal can be effectively formed on the inside of the upper connecting pipe (a height difference is designed between the water outlet hole of the upper connecting pipe and the water outlet hole of the lower connecting pipe, and a liquid seal can be achieved during the use of the air conditioner). When the air conditioner is started, due to the negative pressure inside the air conditioner, the foul air can only be sucked into the lower connecting pipe at most and be sealed by the water in the water storage chamber, and will not enter the upper connecting pipe, thereby preventing gas from entering the interior of the air conditioner, thereby effectively solving the problem of backflow caused by the lower connecting pipe sucking in foul air due to the internal negative pressure when the air conditioner is started.

[0053] The improvements of the present invention are:

[0054] 1. Both the upper connecting pipe and the lower connecting pipe are designed in the water storage chamber. The bottom of the upper connecting pipe is sealed, and a hole is opened upward on its side wall at a height H1 from the bottom of the water storage chamber to connect with the water storage chamber. The upper part of the lower connecting pipe is separated from the water storage chamber by the pipe wall, and a hole is opened on the upper pipe wall at a height H2 from the bottom of the water storage chamber to connect with the water storage chamber. H2 is higher than H1. When the water level in the water storage chamber reaches H1, the opening on the side wall of the upper connecting pipe is ensured to be submerged below the water surface, forming a liquid seal structure to prevent the foul gas in the lower connecting pipe from flowing back into the upper connecting pipe.

[0055] 2. Positioning ribs are designed at the bottom of the upper connecting pipe to limit the insertion position of the air conditioner drain pipe into the upper connecting pipe to above the height H1, so that the condensed water discharged by the air conditioner can flow into the water storage chamber through the opening of the upper connecting pipe.

[0056] 3. The upper portion of the lower connecting pipe is sealed, and an opening is provided on the upper side of the pipe wall outside the water storage chamber to communicate with the outside of the connecting pipe.

[0057] 4. The upper and lower connecting pipes are eccentrically staggered, and the upper part of the water storage chamber is an open structure, which can be sealed with or without a sealing cover.

[0058] The beneficial effects are as follows:

[0059] 1. The height difference between the water outlet holes of the upper connecting pipe and the lower connecting pipe of the pipe connection device structure of the present invention can achieve liquid sealing during the use of the air conditioner to prevent gas from entering the interior of the air conditioner.

[0060] 2. When the air conditioner is not used for a long time and the liquid level in the connecting pipe is lowered and liquid sealing cannot be achieved, the lower connecting pipe and the upper connecting pipe are structurally separated, and the upper part of the lower connecting pipe has an opening connected to the outside. The light-density odorous gas in the sewage pipe rises from the lower connecting pipe and directly disperses to the outside of the connecting pipe through the vent hole of the lower connecting pipe.

[0061] 3. The new connection device has only one part and only requires a mold (injection molding). It is easy to use. Just insert the drain pipe into the upper connection port and insert the lower connection port into the drain pipe or sewer.

[0062] In some embodiments,

[0063] The outer shell 2 is located on the outer periphery of the upper connecting pipe 1, and the upper connecting pipe water outlet 4 is located on the upper connecting pipe 1 and penetrates its inner and outer walls so as to guide the water in the upper connecting pipe 1 into the water storage chamber 6. At least part of the structure of the lower connecting pipe 3 is located in the outer shell 2, and the lower connecting pipe water outlet 5 is provided on the lower connecting pipe 3 and penetrates its inner and outer walls so as to guide the water in the water storage chamber 6 into the lower connecting pipe 3.

[0064] This is the preferred arrangement form of the shell, upper connecting pipe, lower connecting pipe, upper connecting pipe water outlet and lower connecting pipe water outlet of the present invention. By arranging the shell on the outer periphery of the upper connecting pipe, the upper connecting pipe water outlet is arranged on the upper connecting pipe and penetrates the inner and outer walls thereof, the condensed water of the condensed water pipe received in the upper connecting pipe can be effectively discharged into the water storage cavity of the shell. Part of the structure of the lower connecting pipe is located in the shell. The lower connecting pipe water outlet is arranged on the lower connecting pipe and penetrates the inner and outer walls thereof. The water in the water storage cavity inside the shell can be effectively discharged into the lower connecting pipe when it reaches the height of the lower connecting pipe water outlet, and then discharged to the outside, thereby achieving the purpose of discharging condensed water. The action of the water storage cavity in the shell can form a liquid seal for the dirty air returning upward from the lower connecting pipe, preventing the dirty air from entering the upper connecting pipe, thereby solving the problem of backflow caused by the lower connecting pipe sucking in dirty air due to internal negative pressure when the air conditioner is started.

[0065] The pipeline connection device of the present invention includes an upper connecting pipe, a lower connecting pipe and an outer shell. The upper connecting pipe and the lower connecting pipe are designed to be staggered and share part of the pipe wall. The lower part of the upper connecting pipe is arranged inside the outer shell, and the upper part of the lower connecting pipe is inside the outer shell and shares part of the pipe wall with the outer shell. The water storage chamber is composed of the outer shell and the outer walls of the upper connecting pipe and the lower connecting pipe.

[0066] In some embodiments,

[0067] The outer shell 2 and the upper connecting pipe 1 share a bottom, and the bottom of the outer shell 2 and the upper connecting pipe 1 are a sealed structure. The vertical height between the upper connecting pipe water outlet 4 and the sealed structure is H1, the height between the lower connecting pipe water outlet 5 and the sealed structure is H2, and H2>H1. This is the preferred matching structure of the shell, upper connecting pipe, upper connecting pipe water outlet and lower connecting pipe water outlet of the present invention. The shell and the upper connecting pipe share a bottom and form a sealing structure at the bottom, which can store water. By setting the vertical height H1 between the upper connecting pipe water outlet and the sealing structure to be smaller than the height H2 between the lower connecting pipe water outlet and the sealing structure, the condensed water in the upper connecting pipe can be poured into the water storage chamber through the upper connecting pipe water outlet when the height is higher than H1, forming water storage, and the water is discharged to the lower connecting pipe only when the water storage height reaches H2, thereby forming an effective water outlet height in the water storage chamber (the effective water storage height for forming a liquid seal is within the range of H1 to H2), and the excess water is discharged when H2 is reached. Therefore, part of the condensed water is used to form a liquid seal between the lower connecting pipe and the upper connecting pipe, effectively preventing the dirty air in the lower connecting pipe from flowing back into the upper connecting pipe.

[0068] The upper part of the lower connecting pipe of the present invention is separated from the water storage chamber by the pipe wall, and a hole is opened at a position of height H2 of the upper pipe wall from the bottom of the water storage chamber to connect with the water storage chamber. H2 is higher than H1. When the water level of the water storage chamber reaches the height H2, the water outlet of the side wall of the upper connecting pipe is ensured to be submerged below the water surface, forming a liquid seal structure between the lower connecting pipe and the upper connecting pipe, which effectively prevents the dirty gas in the lower connecting pipe from flowing back into the upper connecting pipe.

[0069] In some embodiments,

[0070] The lower connecting pipe 3 includes a first pipe wall 7, a second pipe wall 8 and a third pipe wall 9. The first pipe wall 7 is located inside the shell 2, the second pipe wall 8 is located inside the shell 2, and the third pipe wall 9 is located outside the shell 2. The first pipe wall 7 and the third pipe wall 9 are connected at a first end 11. One end of the shell wall of the shell 2 is also connected to the lower connecting pipe 3 at the first end 11. The second pipe wall 8 and the third pipe wall 9 are connected at a second end 12. The other end of the shell wall of the shell 2 is also connected to the lower connecting pipe 3 at the second end 12. The lower connecting pipe water outlet 5 is opened on the first pipe wall 7 and / or the lower connecting pipe water outlet 5 is opened on the second pipe wall 8. The first pipe wall 7 and the second pipe wall 8 are arranged opposite to each other.

[0071] This is the preferred structural form of the lower connecting pipe of the present invention. It is effectively accommodated inside the shell through the structure of the first tube wall and the second tube wall. The lower connecting pipe water outlet is opened on the first and / or second tube wall, which can effectively discharge the water in the water storage chamber to the lower connecting pipe when the water reaches the height H2. The third tube wall is arranged on the outside of the shell. The lower connecting pipe vent is opened on the third tube wall to discharge the foul air in the lower connecting pipe to the outside, further preventing the foul air from flowing back into the upper connecting pipe. The lower connecting pipe and the shell are respectively connected to the first end and the second end, so that the water storage chamber inside the shell is surrounded by the inner wall of the shell, the outer wall of the upper connecting pipe, the outer wall of the first tube wall and the outer wall of the second tube wall, and the shell and the lower connecting pipe share the third tube wall.

[0072] In some embodiments,

[0073] The other end of the first tube wall 7 and the other end of the second tube wall 8 are connected through the fourth tube wall 10, the fourth tube wall 10 is in contact with the outer wall of the upper connecting tube 1, and the fourth tube wall 10 is arranged opposite to the third tube wall 9; or, the other end of the first tube wall 7 is connected to the outer wall of the upper connecting tube 1, the other end of the second tube wall 8 is connected to the outer wall of the upper connecting tube 1, and the third tube wall 9 is opposite to the outer wall of the upper connecting tube 1, and the first tube wall 7, the second tube wall 8, the third tube wall 9 and the outer wall of the upper connecting tube 1 enclose at least part of the internal space of the lower connecting tube 3.

[0074] These are two different structural forms of the lower connecting tube of the present invention. The first is that the lower connecting tube forms a channel for the lower connecting tube through the fourth tube wall and the first, second and third tube walls, and the fourth tube wall is fitted and connected to the upper connecting tube to form an integral structure; the second structure is that the other ends of the first tube wall and the second tube wall of the lower connecting tube are respectively connected to the outer wall of the upper connecting tube, and the internal space of the lower connecting tube is formed by the first, second tube wall, third tube wall and the outer wall of the upper connecting tube, and the lower connecting tube and the upper connecting tube form an integral structure.

[0075] In some embodiments,

[0076] In the axial projection plane, the first tube wall 7, the second tube wall 8 and the third tube wall 9 form an arc segment structure, the tube wall of the outer shell 2 is also an arc segment structure extending from the first end 11 to the second end 12, and the upper connecting tube 1 is a circular tube structure with a full circumference; when the fourth tube wall 10 is also included: the fourth tube wall 10 is also an arc segment structure, and the fourth tube wall 10 and the upper connecting tube 1 are formed as one piece.

[0077] This is the preferred structural form of the first, second and third tube walls and the fourth tube wall of the lower connecting tube of the present invention, as well as the preferred structural form of the outer shell, and the preferred structural form of the upper connecting tube, preferably an arc segment structure, which can facilitate processing and reduce stress at the connection.

[0078] In some embodiments,

[0079] The third tube wall 9 of the lower connecting tube 3 is provided with a lower connecting tube vent 14 that penetrates the inner and outer walls. The lower connecting tube vent 14 is arranged relative to the lower end of the lower connecting tube 3 and close to the upper end of the lower connecting tube 3. This is a further preferred structural form of the lower connecting tube of the present invention. The lower connecting tube vent provided on the third tube wall of the lower connecting tube (located outside the shell) can also discharge the polluted gas sucked into the lower connecting tube through the lower connecting tube vent, further preventing the polluted gas from flowing back into the upper connecting tube and then entering the interior of the air conditioner. In particular, when the air conditioner is not used for a long time and the liquid level in the connecting tube is lowered and liquid sealing cannot be achieved, the lower connecting tube and the upper connecting tube are separated by a structure and the lower connecting tube vent provided on the upper part of the lower connecting tube is connected to the outside. This allows the light-density odorous gas in the sewage pipe to rise from the lower connecting tube and directly disperse to the outside of the connecting tube through the opening.

[0080] In some embodiments,

[0081] The bottom inner wall of the upper connecting pipe 1 is also provided with a limiting rib 13 extending upward, and the limiting rib 13 can be connected with the bottom of the condensation water pipe and limit the position, and the height of the limiting rib 13 is higher than the bottom surface height of the upper connecting pipe outlet 4.

[0082] The present invention also provides a limiting rib on the inner wall of the upper connecting pipe, which can form contact with the lower end of the condensate pipe, thereby limiting the condensate pipe, thereby preventing the condensate pipe from being inserted into the bottom of the upper connecting pipe and resulting in the inability to effectively discharge the condensate. The height of the limiting rib is higher than the bottom surface height of the upper connecting pipe water outlet, which can further effectively ensure that the condensate discharged from the condensate pipe into the upper connecting pipe is discharged into the water storage cavity of the outer shell through the upper connecting pipe water outlet, ensuring the smooth and effective discharge of the condensate.

[0083] The bottom of the upper connecting pipe of the present invention is sealed, and its side wall (the area opposite the side wall shared with the lower connecting pipe) has a water outlet opened upward at a height H1 from the bottom of the water storage chamber, which is connected to the water storage chamber; positioning ribs are designed at the bottom of the upper connecting pipe to limit the position where the air conditioner drain pipe is inserted into the inner cavity of the upper connecting pipe to above the height H1, so that the condensed water discharged by the air conditioner can flow into the water storage chamber through the opening of the upper connecting pipe.

[0084] In some embodiments,

[0085] The upper end of the lower connecting pipe 3 is flush with the upper end of the housing 2, and / or the upper end of the lower connecting pipe 3 is closed or open; and / or,

[0086] The lower end of the lower connecting pipe 3 extends downward from the bottom of the upper connecting pipe 1 by a preset length, and the lower connecting pipe water outlet 5 extends downward from the upper end of the lower connecting pipe 3 by a preset length.

[0087] This is a further preferred structural form of the lower connecting tube of the present invention, the upper end of which can preferably be flush with the upper end of the outer shell, which is convenient for integrated processing; the upper end of the lower connecting tube can be closed or open, preferably closed, which can shield external impurities; the lower end of the lower connecting tube extends downward from the bottom of the upper connecting tube by a preset length, which can effectively further guide the condensed water to a position below, and the water outlet of the lower connecting tube is preferably opened by extending downward from the upper end of the lower connecting tube by a preset length to form a notch structure, which can ensure that the water in the water storage chamber of the outer shell can be discharged into the lower connecting tube through the notch, thereby effectively discharging the condensed water.

[0088] In some embodiments,

[0089] The upper portion of the housing 2 is open or sealed with a cover, and the height of the housing 2 is less than the height of the upper connecting pipe 1. This is a further preferred structural form of the housing of the present invention. Its upper end can be open or sealed with a cover. The open structure effectively utilizes atmospheric pressure to discharge condensed water from the outlet of the lower connecting pipe, while the sealed cover effectively shields the water inside the water storage chamber from impurities. The height of the housing is preferably less than that of the upper connecting pipe to facilitate installation with the condensate pipe of the air conditioner indoor unit. The condensate pipe can be inserted into the interior of the upper connecting pipe to complete the installation.

[0090] In some embodiments,

[0091] The central axis of the upper connecting pipe 1 does not coincide with the central axis of the lower connecting pipe 3 and is eccentrically staggered; and / or,

[0092] The upper connecting pipe 1 , the outer shell 2 and the lower connecting pipe 3 are an integrally formed structure.

[0093] This is a further preferred structural form of the upper connecting pipe and the lower connecting pipe of the present invention. Through the eccentric staggered setting, the eccentric side can form the structure of the water storage chamber of the outer shell, and the other eccentric side can form the structure of the lower connecting pipe. The upper connecting pipe water outlet is provided on the eccentric side to discharge the condensed water of the upper connecting pipe into the water storage chamber, and the lower connecting pipe water outlet is provided on the other eccentric side to effectively discharge the water in the water storage chamber into the lower connecting pipe, completing the simple and compact design of the integrated structure, and can form a structural form of the upper connecting pipe, water storage chamber and lower connecting pipe that are connected in sequence, effectively forming a liquid seal to prevent the backflow of dirty air.

[0094] The present invention also arranges the upper connecting pipe, the outer shell and the lower connecting pipe to be integrally molded, preferably integrally injection molded, so that only one set of molds is needed to complete the injection molding. The invention is simple to use, and only the drain pipe needs to be inserted into the upper connecting port and the lower connecting port needs to be inserted into the drain pipe or sewer. This solves the problem that the existing connecting device requires two sets of molds to be made, resulting in low assembly efficiency.

[0095] The present invention also provides an air-conditioning indoor unit, which includes the aforementioned pipe connecting device.

[0096] The present invention also provides an air conditioner, which includes the aforementioned air conditioner indoor unit.

[0097] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A pipe connection device, characterized in that: include: An upper connecting pipe (1), a shell (2) and a lower connecting pipe (3), wherein the upper end of the upper connecting pipe (1) is connected to the condensation water pipe of the air conditioner, the shell (2) is connected between the upper connecting pipe (1) and the lower connecting pipe (3), the upper connecting pipe (1) is connected to the interior of the shell (2) through the upper connecting pipe water outlet (4), the lower connecting pipe (3) is connected to the interior of the shell (2) through the lower connecting pipe water outlet (5), and the height of the upper connecting pipe water outlet (4) is lower than the height of the lower connecting pipe water outlet (5), so that the internal cavity of the shell (2) is formed into a water storage cavity (6) capable of storing water, and the water level in the water storage cavity (6) can form a liquid seal on the interior of the upper connecting pipe (1) when it is higher than the upper connecting pipe water outlet (4); The outer shell (2) is located on the outer periphery of the upper connecting pipe (1); the upper connecting pipe water outlet (4) is located on the upper connecting pipe (1) and penetrates the inner and outer walls thereof so as to be able to guide the water in the upper connecting pipe (1) to the water storage chamber (6); at least part of the structure of the lower connecting pipe (3) is located in the outer shell (2); and the lower connecting pipe water outlet (5) is provided on the lower connecting pipe (3) and penetrates the inner and outer walls thereof so as to be able to guide the water in the water storage chamber (6) to the lower connecting pipe (3); The lower connecting pipe (3) comprises a first pipe wall (7), a second pipe wall (8) and a third pipe wall (9); the first pipe wall (7) is located inside the outer shell (2); the second pipe wall (8) is located inside the outer shell (2); and the third pipe wall (9) is located outside the outer shell (2); the first pipe wall (7) and the third pipe wall (9) are connected at a first end (11); one end of the shell wall of the outer shell (2) is also connected to the lower connecting pipe (3) at the first end (11); the second pipe wall (8) and the third pipe wall (9) are connected at a second end (12); the other end of the shell wall of the outer shell (2) is also connected to the lower connecting pipe (3) at the second end (12); the lower connecting pipe water outlet (5) is opened on the first pipe wall (7) and / or the lower connecting pipe water outlet (5) is opened on the second pipe wall (8); and the first pipe wall (7) and the second pipe wall (8) are arranged opposite to each other.

2. The pipe connection device according to claim 1, characterized in that: The outer shell (2) and the upper connecting pipe (1) share a bottom, and the bottoms of the outer shell (2) and the upper connecting pipe (1) are sealed structures. The vertical height between the water outlet (4) of the upper connecting pipe and the sealed structure is H1, and the height between the water outlet (5) of the lower connecting pipe and the sealed structure is H2, and H2>H1.

3. The pipe connection device according to claim 1, characterized in that: The other end of the first tube wall (7) and the other end of the second tube wall (8) are connected via a fourth tube wall (10), the fourth tube wall (10) is in contact with the outer wall of the upper connecting tube (1), and the fourth tube wall (10) is arranged opposite to the third tube wall (9); or, the other end of the first tube wall (7) is in contact with the outer wall of the upper connecting tube (1), the other end of the second tube wall (8) is in contact with the outer wall of the upper connecting tube (1), and the third tube wall (9) is opposite to the outer wall of the upper connecting tube (1), and the first tube wall (7), the second tube wall (8), the third tube wall (9) and the outer wall of the upper connecting tube (1) enclose at least part of the internal space of the lower connecting tube (3).

4. The pipe connection device according to claim 3, characterized in that: In the axial projection plane, the first tube wall (7), the second tube wall (8) and the third tube wall (9) form an arc segment structure, the tube wall of the shell (2) is also an arc segment structure extending from the first end (11) to the second end (12), and the upper connecting tube (1) is a circular tube structure with a full circumference; when a fourth tube wall (10) is also included: the fourth tube wall (10) is also an arc segment structure, and the fourth tube wall (10) and the upper connecting tube (1) are formed as one piece.

5. The pipe connection device according to claim 1, characterized in that: A lower connecting pipe vent hole (14) penetrating the inner and outer walls is provided on the third pipe wall (9) of the lower connecting pipe (3). The lower connecting pipe vent hole (14) is arranged relative to the lower end of the lower connecting pipe (3) and close to the upper end of the lower connecting pipe (3).

6. The pipe connection device according to claim 1, characterized in that: The bottom inner wall of the upper connecting pipe (1) is also provided with a limiting rib (13) extending upward, and the limiting rib (13) can be connected with the bottom of the condensation water pipe and limit the position, and the height of the limiting rib (13) is higher than the bottom surface height of the upper connecting pipe water outlet (4).

7. The pipe connection device according to claim 1, characterized in that: The upper end of the lower connecting pipe (3) is flush with the upper end of the housing (2), and / or the upper end of the lower connecting pipe (3) is closed or open; and / or, The lower end of the lower connecting pipe (3) extends downward from the bottom of the upper connecting pipe (1) by a preset length, and the lower connecting pipe water outlet (5) extends downward from the upper end of the lower connecting pipe (3) by a preset length.

8. The pipe connection device according to any one of claims 1 to 7, characterized in that: The upper portion of the shell (2) is an open structure or is sealed with a cover, and the height of the shell (2) is smaller than the height of the upper connecting pipe (1).

9. The pipe connection device according to any one of claims 1 to 7, characterized in that: The central axis of the upper connecting pipe (1) and the central axis of the lower connecting pipe (3) do not coincide with each other and are arranged eccentrically; and / or, The upper connecting pipe (1), the outer shell (2) and the lower connecting pipe (3) are an integrally formed structure.

10. An air conditioner indoor unit, characterized in that: The invention comprises the pipeline connecting device according to any one of claims 1 to 9.

11. An air conditioner, characterized in that: Including the air conditioner indoor unit according to claim 10.

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