CN111156675A

CN111156675A - Pipe connection joint, pipe connection structure and air conditioner indoor unit

Info

Publication number: CN111156675A
Application number: CN201811321523.0A
Authority: CN
Inventors: 贾飞飞; 林裕亮; 李德清; 金海元; 王朝新; 李军; 傅凯凯; 陈红光; 刘禾铭; 刘胜辈; 曾俊杰
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2018-11-07
Filing date: 2018-11-07
Publication date: 2020-05-15
Also published as: WO2020093568A1

Abstract

The invention provides a pipe joint, a pipe joint structure and an air-conditioning indoor unit, wherein the pipe joint is used for connecting a main machine body and a pipe joint component of the air-conditioning indoor unit, and comprises: the connector comprises a connector main body, a connector assembly and a connector assembly, wherein the connector main body comprises a first connecting part and a second connecting part, the first connecting part is used for being connected with the main body, and the second connecting part is used for being connected with the connecting pipe assembly; joint portion, joint portion sets up on first connecting portion, and first connecting portion pass through joint portion card to be established on the host computer body. The invention aims to solve the problem that the connection pipe structure and the fresh air device in the prior art are difficult to disassemble.

Description

Pipe connection joint, pipe connection structure and air conditioner indoor unit

Technical Field

The invention relates to the field of air conditioners, in particular to a connecting pipe joint, a connecting pipe structure and an air conditioner indoor unit.

Background

In recent years, air pollution has become serious due to rapid development of economy and rapid progress of urbanization. Haze weather has been present throughout the year in most cities in china. The increase of PM2.5 concentration directly causes frequent dust-haze weather and great increase of toxic and harmful substances in fog, and seriously threatens the health of human beings. Under the condition, the conventional household comfortable air conditioner can not meet the requirements for cooling and heating, and the health, comfort and environmental protection become the development targets of the modern air conditioner.

Therefore, the air conditioner with the fresh air function is particularly important. Besides the requirement of the air conditioner with the fresh air function for reliability, the connection pipe part needs to be simply disassembled and assembled. And the takeover among the prior art is comparatively difficult with the dismantlement of new trend device, is unfavorable for the equipment between takeover and the new trend device.

Disclosure of Invention

The invention mainly aims to provide a connecting pipe joint, a connecting pipe structure and an air conditioner indoor unit, and aims to solve the problem that the connecting pipe structure and a fresh air device in the prior art are difficult to disassemble.

In order to accomplish the above object, according to a first aspect of the present invention, there is provided a joint connector for connecting a main body of an air conditioning indoor unit and a joint assembly, the joint connector comprising: the connector comprises a connector main body, a connector assembly and a connector assembly, wherein the connector main body comprises a first connecting part and a second connecting part, the first connecting part is used for being connected with the main body, and the second connecting part is used for being connected with the connecting pipe assembly; joint portion, joint portion sets up on first connecting portion, and first connecting portion pass through joint portion card to be established on the host computer body.

Further, the nipple subassembly includes the ventilation pipe, and the nipple still includes: and the pipe connecting part is positioned in the second connecting part and is used for being butted with the ventilation pipe.

Further, the ventilation pipe is a plurality of, connects the pipe portion to be a plurality of, and a plurality of pipe portions and a plurality of ventilation pipe one-to-one set up.

Further, the connecting pipe assembly comprises a sleeve sleeved on the outer side of the ventilation pipe, and an inserting gap for inserting the sleeve is formed between the inner wall surface of the second connecting part and the outer wall surfaces of the connecting pipe parts.

Furthermore, the end parts of the second connecting part and the pipe connecting part are provided with insertion chamfers so that an insertion opening is formed in the insertion gap; the opening degree of the insertion opening gradually increases in a direction away from the first connection portion.

Further, the inner wall surface of the second connecting portion is a circular surface, and at least part of the outer surface of the connecting pipe portion is an arc-shaped surface matched with the inner wall surface of the second connecting portion, so that the inserting gap is annular.

Furthermore, the number of the pipe connecting parts is two, the outer wall surfaces of the two pipe connecting parts respectively comprise a first surface part and a second surface part, the first surface parts of the two pipe connecting parts are arranged in parallel, and the second surface parts of the two pipe connecting parts are positioned on the same cylindrical surface.

Furthermore, the adapter connector further comprises a positioning plate, the positioning plate is positioned in the second connecting portion, and the tube connecting portion and the second connecting portion are both connected with the positioning plate.

Further, a clamping groove for positioning the clamping component is formed among the first connecting part, the positioning plate and the pipe connecting part.

Further, the first connecting part, the second connecting part and the connecting pipe part are all tubular.

Further, joint portion includes the cantilever beam, forms the elastic gap between at least part and the first connecting portion of cantilever beam, is provided with on the cantilever beam to be used for with the main frame body on draw-in groove matched with buckle spare.

Furthermore, the cantilever beam is provided with a pressing block, so that the cantilever beam moves by pressing the pressing block, and the clamping piece is separated from the clamping groove.

Furthermore, an avoiding groove for avoiding the cantilever beam is arranged on the first connecting part.

Further, joint portion is a plurality of, and a plurality of joint portions set up along the circumference interval of first connecting portion.

According to a second aspect of the present invention, there is provided a pipe joint structure, comprising a pipe joint assembly and a pipe joint connected to the pipe joint assembly, wherein the pipe joint assembly is connected to a main body of an air conditioning indoor unit through the pipe joint, and the pipe joint is the above-mentioned pipe joint.

Furthermore, the main frame body includes the new trend device, and the nozzle subassembly includes two ventilation pipes, and a ventilation pipe passes through the nozzle and connects the new trend import intercommunication with the new trend device, and another ventilation pipe passes through the nozzle and connects the dirty wind export intercommunication with the new trend device.

Furthermore, the pipe connecting structure further comprises an indoor joint air box, the indoor joint air box is arranged on the fresh air device, and the clamping portion of the pipe connecting joint is clamped with the indoor joint air box.

Furthermore, the indoor joint wind box comprises an indoor main box body and an indoor butt joint arranged on the indoor main box body, and the connecting pipe joint is in butt joint with the indoor butt joint; a fresh air butt joint and a dirty air butt joint are arranged in the indoor butt joint, one ventilation pipe is communicated with the fresh air butt joint, and the other ventilation pipe is communicated with the dirty air butt joint.

According to a third aspect of the present invention, there is provided an indoor unit of an air conditioner, comprising a main body and a pipe connection structure connected to the main body, wherein the pipe connection structure is the above-mentioned pipe connection structure.

Furthermore, the main machine body comprises a rear cover, and a fresh air device of the indoor unit of the air conditioner is arranged on the inner side of the rear cover; the rear cover is provided with a yielding hole, and the adapter joint of the adapter structure penetrates through the yielding hole of the rear cover.

The adapter connector comprises a connector main body and a clamping portion, wherein the connector main body comprises a first connecting portion and a second connecting portion, the first connecting portion is used for being connected with a main machine body, the second connecting portion is used for being connected with an adapter assembly, the clamping portion is arranged on the first connecting portion, and the first connecting portion is clamped on the main machine body through the clamping portion. Therefore, the pipe joint can be used for conveniently and detachably installing the pipe joint assembly on the main machine body, and the problem that the pipe joint structure and the fresh air device in the prior art are difficult to disassemble is solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a schematic structural view of an embodiment of a nipple according to the present invention;

FIG. 2 shows a top view of the embodiment of the nipple of FIG. 1;

FIG. 3 shows a side view of the embodiment of the nipple of FIG. 1;

FIG. 4 shows a cross-sectional view of an embodiment of the nipple joint of FIG. 1;

FIG. 5 shows an exploded view of an embodiment of the nozzle arrangement of the present invention;

FIG. 6 shows an assembled view from one perspective of the nozzle arrangement of FIG. 5;

FIG. 7 shows an assembled view from another perspective of the nozzle arrangement of FIG. 5;

FIG. 8 is a first perspective view of the present invention illustrating the assembled state of the nozzle fitting and the indoor fitting bellows;

FIG. 9 is a schematic structural view illustrating a second perspective view of the assembled state between the nipple and the indoor joint bellows of FIG. 8;

FIG. 10 is a schematic structural view illustrating a third perspective of an assembled state between the nipple and the indoor joint bellows of FIG. 8;

FIG. 11 is a sectional view showing an assembled state between the nipple and the indoor nipple wind box in FIG. 8;

fig. 12 shows a front view of an embodiment of an air conditioning indoor unit in the present invention;

figure 13 shows a side view of the embodiment of the air conditioning indoor unit in figure 12;

figure 14 shows a top view of the embodiment of the air conditioning indoor unit in figure 12;

figure 15 shows a split schematic view of the embodiment of the air conditioning indoor unit in figure 12; and

fig. 16 is a disassembled schematic view showing an air intake panel part of the air conditioning indoor unit of fig. 15.

Wherein the figures include the following reference numerals:

3. a pipe connection joint; 10. a main body; 20. a pipe connecting component; 21. a vent pipe; 22. a sleeve; 23. heat preservation cotton; 24. pressing a plate; 25. a rain cover; 26. a rain-proof cover; 27. a heat preservation pipe; 30. a connector body; 31. a first connection portion; 311. avoiding the groove; 32. a second connecting portion; 40. a clamping part; 41. a cantilever beam; 42. a fastener; 43. a pressing block; 50. a pipe receiving part; 51. inserting a gap; 52. inserting a chamfer; 53. an insertion opening; 54. a first surface portion; 55. a second surface portion; 60. positioning a plate; 61. clamping the groove; 70. a chucking member; 80. an indoor joint wind box; 81. an indoor main box body; 82. indoor butt joints; 90. a rear cover; 91. a hole of abdication; 110. a fresh air device; 121. an evaporator component; 122. a base member; 123. a chassis member; 124. an appliance housing component; 125. a lower panel member; 126. an air outlet assembly; 127. a panel member; 128. left and right trim panel components; 129. an air outlet frame member; 130. an air duct member; 131. a top cover member; 132. an air intake panel member; 133. a grid; 134. a filter screen; 135. a panel fastener; 136. an air inlet panel.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The present invention provides a pipe joint for connecting a main body 10 and a pipe joint assembly 20 of an indoor unit of an air conditioner, and referring to fig. 1 to 16, the pipe joint comprises: a joint body 30, the joint body 30 including a first connection part 31 for connection with the main body 10 and a second connection part 32 for connection with the nipple assembly 20; the clamping portion 40, the clamping portion 40 is disposed on the first connecting portion 31, and the first connecting portion 31 is clamped on the main body 10 by the clamping portion 40.

The adapter connector of the present invention comprises a connector main body 30 and a clamping portion 40, wherein the connector main body 30 comprises a first connecting portion 31 for connecting with the main body 10 and a second connecting portion 32 for connecting with the adapter assembly 20, and the clamping portion 40 is disposed on the first connecting portion 31, and the first connecting portion 31 is clamped on the main body 10 by the clamping portion 40. Therefore, the pipe joint assembly 20 can be conveniently and detachably mounted on the main body 10 by using the pipe joint, and the problem that the pipe joint structure and the fresh air device are difficult to detach in the prior art is solved.

In the present embodiment, as shown in fig. 1 to 4, the nipple assembly 20 includes a vent pipe 21, and the nipple further includes: and a connecting pipe part 50, wherein the connecting pipe part 50 is positioned in the second connecting part 32, and the connecting pipe part 50 is used for being butted with the ventilation pipe 21. By providing the adapter 50, it is possible to communicate the adapter with the vent pipe 21 relatively easily. Specifically, the lumen of the vent tube 21 communicates with the cavity of the adapter tube 50.

Specifically, there are a plurality of ventilation pipes 21, a plurality of joint pipes 50, and a plurality of joint pipes 50 are provided in one-to-one correspondence with the plurality of ventilation pipes 21. Preferably, there are two ventilation pipes 21, which are an air inlet pipe and an air outlet pipe. Preferably, the plurality of piping parts 50 are provided at intervals.

In the present embodiment, as shown in fig. 4, the junction pipe assembly 20 includes the sleeve 22 fitted around the outside of the ventilation pipe 21, and an insertion gap 51 for inserting the sleeve 22 is formed between the inner wall surface of the second connection portion 32 and the outer wall surfaces of the plurality of junction pipe portions 50. The positioning of the pipe joint assembly 20 can be relatively conveniently formed by inserting the end portion of the sleeve 22 into the insertion gap 51.

In order to facilitate the insertion of the sleeve 22 into the insertion gap 51, as shown in fig. 4, the ends of the second connecting portion 32 and the piping portion 50 are each provided with an insertion chamfer 52 so that the insertion gap 51 forms an insertion opening 53; the opening degree of the insertion opening 53 gradually increases in a direction away from the first connection portion 31.

Since the sleeve 22 is a circular pipe, in the present embodiment, as shown in fig. 2, the inner wall surface of the second connecting portion 32 is a circular surface, and at least a part of the outer surface of the pipe connecting portion 50 is an arc surface that fits the inner wall surface of the second connecting portion 32, so that the insertion gap 51 is annular. Here, the shape of the insertion gap 51 is adapted to the shape of the sleeve 22.

Because there are two ventilation pipes 21, there are two connecting pipe parts 50, the outer wall surfaces of the two connecting pipe parts 50 each include a first surface part 54 and a second surface part 55, the first surface parts 54 of the two connecting pipe parts 50 are arranged in parallel, and the second surface parts 55 of the two connecting pipe parts 50 are located on the same cylindrical surface. In this way, the inner space of the second connection portion 32 can be saved, and the arrangement of the adapter can be facilitated. Preferably, the first surface portion 54 is planar.

In order to realize the connection between the extension pipe parts 50 and the second connecting parts 32, as shown in fig. 2, the adapter coupling further comprises a positioning plate 60, the positioning plate 60 is located in the second connecting parts 32, and both the extension pipe parts 50 and the second connecting parts 32 are connected with the positioning plate 60. At this time, the adjacent two pipe connecting portions 50 are also connected by the positioning plate 60.

In the present embodiment, as shown in fig. 11, a chucking groove 61 for positioning the chucking member 70 is formed between the first coupling portion 31, the positioning plate 60, and the piping portion 50. The fastening member 70 can stabilize the connection between the joint pipe and the indoor joint air box 80 of the indoor unit of the air conditioner.

In the present embodiment, the first connecting portion 31, the second connecting portion 32, and the connecting tube portion 50 are all tubular.

In order to realize the elastic clamping between the adapter connector and the main body 10, as shown in fig. 4 and 11, the clamping portion 40 includes a cantilever beam 41, an elastic gap is formed between at least a portion of the cantilever beam 41 and the first connecting portion 31, and a clamping member 42 for cooperating with a clamping groove on the main body 10 is disposed on the cantilever beam 41. By forming the elastic gap, the cantilever beam 41 can have elasticity, thereby ensuring the clamping of the fastener 42.

In the present embodiment, the cantilever 41 is provided with a pressing block 43, so that the cantilever 41 is moved by pressing the pressing block 43 to disengage the latch 42 from the slot. By providing the pressing block 43, the cantilever beam 41 can be pressed relatively easily.

In order to prevent the first connecting portion 31 from interfering with the cantilever beam 41, as shown in fig. 4, an avoiding groove 311 for avoiding the cantilever beam 41 is provided on the first connecting portion 31.

In the present embodiment, as shown in fig. 4, the plurality of snap-in portions 40 are provided, and the plurality of snap-in portions 40 are provided at intervals in the circumferential direction of the first connecting portion 31. Therefore, the clamping effect of the adapter connector can be ensured.

The invention provides a pipe connection structure, as shown in fig. 5 to 7, comprising a pipe connection component 20 and a pipe connection joint 3 connected with the pipe connection component 20, wherein the pipe connection component 20 is connected with a main body 10 of an air-conditioning indoor unit through the pipe connection joint 3, and the pipe connection joint 3 is the above-mentioned pipe connection joint.

In this embodiment, the main body 10 includes a fresh air device 110, the pipe connecting assembly 20 includes two ventilation pipes 21, one ventilation pipe 21 is communicated with a fresh air inlet of the fresh air device 110 through the pipe connecting joint 3, and the other ventilation pipe 21 is communicated with a dirty air outlet of the fresh air device 110 through the pipe connecting joint 3. The arrangement of the connecting pipe structure can compare the ventilation and the exhaust of the polluted air to the fresh air device 110 in the Bo-He area.

In this embodiment, as shown in fig. 8 to 11, the connection pipe structure further includes an indoor connector wind box 80, the indoor connector wind box 80 is disposed on the fresh air device 110, and the clamping portion 40 of the connection pipe connector 3 is clamped with the indoor connector wind box 80.

Specifically, the indoor joint wind box 80 comprises an indoor main box body 81 and an indoor butt joint 82 arranged on the indoor main box body 81, and the adapter joint 3 is butted with the indoor butt joint 82; a fresh air butt joint and a dirty air butt joint are arranged in the indoor butt joint 82, one ventilation pipe 21 is communicated with the fresh air butt joint, and the other ventilation pipe 21 is communicated with the dirty air butt joint.

In addition, the connecting pipe structure further comprises heat insulation cotton 23 clamped between the two ventilation pipes 21, the connecting pipe assembly 20 is connected with a rain cover 25 through a heat insulation pipe 27 and a pressing plate 24, and a rain cover 26 is arranged at an opening of the rain cover 25.

The present invention also provides an air conditioning indoor unit, which includes a main body 10 and a pipe connection structure connected to the main body 10, as shown in fig. 12 to 16, the pipe connection structure is the above-mentioned pipe connection structure.

In this embodiment, the main body 10 includes a rear cover 90, and a fresh air device 110 of the indoor unit of the air conditioner is disposed inside the rear cover 90; the rear cover 90 is provided with a yielding hole 91, and the adapter connector 3 of the adapter structure penetrates through the yielding hole 91 of the rear cover 90.

The air-conditioning indoor unit further comprises an evaporator component 121, a base component 122, a chassis component 123, an electrical box component 124, a lower panel component 125, an air outlet component 126, a panel component 127, a left decorative panel component 128, a right decorative panel component 128, an air outlet frame component 129, an air duct component 130, a top cover component 131 and an air inlet panel component 132; the intake panel assembly 132 includes a grill 133, a filter screen 134, a panel latch 135, and an intake panel 136.

The pipe joint solves the problems of difficult disassembly and assembly after sale by designing the buckle on the air pipe joint. The problem of heat preservation is solved to the foam that increases in joint department, connects through the design, and the structure solution of foam box new trend part air-out box is sealed, and the new trend is scurried the wind problem each other with airing exhaust.

The invention relates to a portable pipe joint of a total-heat fresh air conditioner, a method for sealing the pipe joint of the total-heat fresh air conditioner and preventing the short circuit of fresh air and exhaust air, and a method for preserving the heat of the pipe joint of the total-heat fresh air conditioner

The invention relates to a conveniently-disassembled connecting pipe joint of a total-heat fresh air conditioner, which penetrates through a rear cover of an air inlet part and is inserted into an air box (indoor connecting pipe) clamping groove of an air box (indoor connecting pipe) of a fresh air part through a clamping buckle.

Design for the wind box: the wind box (indoor connecting pipe) is fixed on the screw post of the rear shell of the fresh air component through screws, one side of the wind box (indoor connecting pipe) is a fresh air inlet of the fresh air component, and the other side of the wind box (indoor connecting pipe) is an air exhaust outlet. The window is used for realizing fresh air and exhaust air exchange of the whole total-heat fresh air conditioner indoor unit. Two sides of the wind box (indoor connecting pipe) are respectively provided with a wind box (indoor connecting pipe) buckling groove.

For the design of the adapter: the pipe joint is used for connecting the indoor unit of the total-heat fresh air conditioner and the air pipe, one side is used for fresh air, and the other side is used for air exhaust. The fresh air side is connected with a fresh air inlet of an air box (an indoor connecting pipe) and a fresh air semicircular pipe to form a fresh air channel. The air exhaust side is connected with an air exhaust outlet of an air box (an indoor connecting pipe) and an air exhaust semicircular pipe to form an air exhaust channel. The two sides of the adapter connector are respectively provided with an adapter connector buckle and an adapter connector buckle stress surface.

Design for the back cover: the back lid is inserted on the air inlet panel through two bolts of lower extreme, and two buckles of upper end are detained on the air inlet panel, finally with 1 screw fixation. There is 1 via hole in the middle of the back lid, when after sale installation, can be under the circumstances of not opening the back lid, the takeover connects and is connected fixedly through back lid via hole and wind box (indoor takeover).

For the design of the foam (joint): the foam (joint) is fixed in the adapter joint to play a role in heat preservation. The temperature of the fresh air and the temperature of the two sides of the exhaust air are different, and when the temperature difference is very large, condensate water can be generated, and the foam (joint) is added to avoid generating condensate water on the intersection surface of the fresh air and the exhaust air.

The principle of the easy-to-detach type adapter connector is as follows: in after-sale installation, the joint of the pipe connecting component is inserted into the wind box (indoor pipe connecting) under the condition of not detaching the rear cover of the wind connecting component. The joint of the connecting pipe is buckled and enters a buckling groove of the wind box (the indoor connecting pipe), and the joint is assembled in place when a rattling sound is heard; when a customer detaches the pipe connecting part, the customer slightly presses the buckle stress surface of the pipe connecting joint, and the buckle of the pipe connecting joint is separated from the buckle groove of the wind box (indoor connecting pipe), so that the pipe connecting part can be taken out. The buckle stress surface of the adapter connector is exposed outside the rear cover during design, and the buckle stress surface of the adapter connector cannot be smaller than the area of a human finger, so that the adapter connector is convenient to disassemble after sale.

When the fresh air fan of the total-heat fresh air conditioner is in a normal working state, the air speed of the exhaust side is far greater than that of the fresh air side, pressure difference is generated between the two sides, and air on the exhaust side can enter the fresh air side. The invention adopts the U-shaped seam allowance (clamping groove 61), the gap of the matching surfaces is 0, the straight surfaces are matched with the straight surfaces, and the matching surfaces of the foam (connector) and the pipe connector and the air box (indoor pipe connector) are in interference fit by the compressible characteristic of the foam, thereby effectively preventing fresh air and exhaust air from escaping.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

1. the problems that the fresh air pipe is difficult to disassemble and assemble after sale are solved;

2. the problems of sealing and heat preservation at the joint of the fresh air pipe are solved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A joint for connecting a main body (10) of an air conditioning indoor unit and a joint assembly (20), characterized in that it comprises:

a joint main body (30), the joint main body (30) including a first connection part (31) for connection with the main body (10) and a second connection part (32) for connection with the junction block assembly (20);

joint portion (40), joint portion (40) set up on first connecting portion (31), first connecting portion (31) pass through joint portion (40) card is established on the host computer body (10).

2. The nipple according to claim 1, wherein said nipple assembly (20) comprises a vent tube (21), said nipple further comprising:

the pipe connecting part (50) is located in the second connecting part (32), and the pipe connecting part (50) is used for being in butt joint with the ventilation pipe (21).

3. The adapter according to claim 2, wherein the ventilation pipe (21) is plural, the tube connecting portion (50) is plural, and the plural tube connecting portions (50) are provided in one-to-one correspondence with the plural ventilation pipes (21).

4. The adapter according to claim 3, wherein the adapter member (20) comprises a sleeve (22) fitted around the outside of the ventilation pipe (21), and an insertion gap (51) for inserting the sleeve (22) is formed between an inner wall surface of the second connecting portion (32) and an outer wall surface of the plurality of pipe connecting portions (50).

5. The pipe connection according to claim 4, wherein the ends of the second connecting portion (32) and the pipe connection portion (50) are each provided with an insertion chamfer (52) so that the insertion gap (51) forms an insertion opening (53); the opening degree of the insertion opening (53) is gradually increased in a direction away from the first connection portion (31).

6. The adapter according to claim 4, characterized in that the inner wall surface of the second connecting portion (32) is a circular surface, and at least a part of the outer surface of the connecting tube portion (50) is an arc surface that fits the inner wall surface of the second connecting portion (32) so that the insertion gap (51) is circular.

7. A pipe coupling according to claim 3, wherein there are two of said pipe receiving portions (50), the outer wall surfaces of both of said pipe receiving portions (50) each comprise a first surface portion (54) and a second surface portion (55), the first surface portions (54) of both of said pipe receiving portions (50) being arranged in parallel, and said second surface portions (55) of both of said pipe receiving portions (50) being located on the same cylindrical surface.

8. The nipple according to claim 2, further comprising a positioning plate (60), said positioning plate (60) being located within said second connecting portion (32), said nipple portion (50) and said second connecting portion (32) both being connected to said positioning plate (60).

9. The adapter coupling according to claim 8, wherein a clamping groove (61) for positioning a clamping member (70) is formed between the first coupling part (31), the positioning plate (60) and the fitting part (50).

10. A pipe connection according to claim 2, wherein the first connection portion (31), the second connection portion (32) and the pipe connection portion (50) are all tubular.

11. The adapter connector according to claim 1, wherein the locking portion (40) comprises a cantilever beam (41), an elastic gap is formed between at least a portion of the cantilever beam (41) and the first connecting portion (31), and a locking member (42) for engaging with a locking groove of the main body (10) is disposed on the cantilever beam (41).

12. The adapter according to claim 11, characterized in that a pressing block (43) is provided on the cantilever beam (41) to move the cantilever beam (41) by pressing the pressing block (43) to disengage the catch (42) from the catch.

13. Adapter according to claim 11, characterized in that said first connection portion (31) is provided with an escape recess (311) for escaping said cantilever beam (41).

14. The adapter coupling according to claim 1, wherein the plurality of snap-in portions (40) are provided, and the plurality of snap-in portions (40) are provided at intervals in the circumferential direction of the first connecting portion (31).

15. A pipe connection structure comprising a pipe connection assembly (20) and a pipe connection nipple (3) connected to said pipe connection assembly (20), said pipe connection assembly (20) being connected to a main body (10) of an air conditioning indoor unit through said pipe connection nipple (3), characterized in that said pipe connection nipple (3) is a pipe connection nipple according to any one of claims 1 to 14.

16. Nozzle structure according to claim 15, wherein said main body (10) comprises a fresh air device (110), said nozzle assembly (20) comprises two ventilation tubes (21), one of said ventilation tubes (21) being in communication with a fresh air inlet of said fresh air device (110) through said nozzle fitting (3), the other of said ventilation tubes (21) being in communication with a dirty air outlet of said fresh air device (110) through said nozzle fitting (3).

17. The connection pipe structure according to claim 16, further comprising an indoor joint air box (80), wherein the indoor joint air box (80) is arranged on the fresh air device (110), and the clamping portion (40) of the connection pipe joint (3) is clamped with the indoor joint air box (80).

18. The nozzle structure according to claim 17, wherein the indoor joint bellows (80) comprises an indoor main case (81) and an indoor butt joint (82) provided on the indoor main case (81), the nozzle joint (3) being butted against the indoor butt joint (82); the indoor butt joint (82) is internally provided with a fresh air butt joint and a dirty air butt joint, one ventilation pipe (21) is communicated with the fresh air butt joint, and the other ventilation pipe (21) is communicated with the dirty air butt joint.

19. An air-conditioning indoor unit comprising a main body (10) and a nozzle structure connected to the main body (10), characterized in that the nozzle structure is as claimed in any one of claims 15 to 18.

20. The indoor unit of claim 19, wherein the main body (10) comprises a rear cover (90), and a fresh air device (110) of the indoor unit is provided inside the rear cover (90); be provided with hole of stepping down (91) on back lid (90), the takeover joint (3) of takeover structure wears to establish in hole of stepping down (91) of back lid (90).