CN111156672A

CN111156672A - Pipe connection structure and air conditioner indoor unit with same

Info

Publication number: CN111156672A
Application number: CN201811320786.XA
Authority: CN
Inventors: 贾飞飞; 金海元; 王朝新; 曾庆和; 赖孝成; 李德清; 李军; 陈圣文; 林裕亮; 傅凯凯; 陈红光; 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
Anticipated expiration: 2038-11-07
Also published as: WO2020093571A1; CN111156672B

Abstract

The invention provides a connecting pipe structure and an air conditioner indoor unit with the same, wherein the connecting pipe structure comprises: the tube cavity of the first tube body is a first gas channel; the second pipe body is sleeved outside the first pipe body, and a second gas channel is formed in a gap between the second pipe body and the first pipe body; wherein, the at least part of first body and the at least part of second body all can be buckled and set up to take over the position of structure through buckling first body and the adjustment of second body. The structure of taking over of new trend among the prior art is comparatively complicated problem has been solved to this structure of taking over.

Description

Pipe connection structure and air conditioner indoor unit with same

Technical Field

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

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. The air conditioner with the fresh air function needs to be connected with the outdoor, and the connecting pipe structure of the common air conditioner is not suitable for the air conditioner with the fresh air function. The air conditioner with the fresh air function needs to be connected with the outdoor, the connection is required to be reliable, and the installation is simple.

At present, the installation modes of a fresh air fan fresh air pipe and an exhaust pipe in the market are divided into the following two modes:

the first method comprises the following steps: the fresh air pipe and the exhaust pipe are respectively drilled with one hole during after-sale installation, the air conditioner air-conditioning pipe, the drain pipe and the internal and external machine connecting line of the air conditioner are drilled with one hole, 3 holes are needed to be drilled at a customer home, and therefore the attractiveness of a house and the strength of a wall body are affected.

And the second method comprises the following steps: the connecting pipe of the fresh air suction and the exhaust air of the fresh air machine penetrates through one wall hole, only one wall hole needs to be drilled, the drilling cost is low, but the connecting pipe cannot be bent, and the use of the vertical cabinet type air conditioner cannot be met. When the vertical cabinet type air conditioner is installed, the air inlet part cannot be installed in parallel to the wall, a certain angle is required to be formed between the air inlet part and the wall, and the air conditioner needs to be moved when being installed after sale, so that the connecting pipe is required to have bending capacity.

Therefore, the pipe connection structures of the two new fans on the market are complex in structure, and the pipe connection structures cannot be bent, so that the requirements cannot be met.

Disclosure of Invention

The invention mainly aims to provide a pipe connection structure and an air conditioner indoor unit with the same, and aims to solve the problem that the structure of a fresh air pipe connection structure in the prior art is complex.

In order to achieve the above object, according to one aspect of the present invention, there is provided a nozzle structure including: the tube cavity of the first tube body is a first gas channel; the second pipe body is sleeved outside the first pipe body, and a second gas channel is formed in a gap between the second pipe body and the first pipe body; wherein, the at least part of first body and the at least part of second body all can be buckled and set up to take over the position of structure through buckling first body and the adjustment of second body.

In this embodiment, the first tube is a flexible hose, and the second tube is a plastic corrugated tube or a flexible hose.

In this embodiment, the pipe connection structure is used for being connected with the main body of the air-conditioning indoor unit, so that the main body of the air-conditioning indoor unit is communicated with the outside through the pipe connection structure, and the pipe connection structure further includes: and the indoor joint part is arranged on one side of the first pipe body and the second pipe body, which is close to the main body of the indoor air conditioner, so that the first pipe body and the second pipe body are connected with the main body of the indoor air conditioner through the indoor joint part.

In this embodiment, the indoor joint member includes a first connecting portion and a second connecting portion located outside the first connecting portion, the first connecting portion is fitted to the outside of the first pipe body and communicated with the first gas passage, the second pipe body is fitted to the outside of the second connecting portion, and a gap between the second connecting portion and the first connecting portion is communicated with the second gas passage.

In this embodiment, the adapter structure further includes: the first sealing ring is arranged in the first connecting part and clamped between the end face of the first pipe body and the inner wall face of the first connecting part.

In this embodiment, the cavity of the first connecting portion is a stepped hole, and the first sealing ring is limited at a stepped surface of the stepped hole.

In this embodiment, the main body of the indoor unit of the air conditioner has a connection pipe connection portion, and the connection pipe structure further includes a third connection portion, where the third connection portion is connected to the second connection portion, and the third connection portion is used for being connected to the connection pipe connection portion.

In this embodiment, a clamping groove portion is formed in the connecting pipe connecting portion, and a clamping component matched with the clamping groove portion is arranged on the third connecting portion, so that the third connecting portion is detachably connected with the connecting pipe connecting portion through the clamping of the clamping component and the clamping groove portion.

In this embodiment, the adapter structure further includes: and the clamping component is arranged in the cavity of the third connecting part and is clamped between the third connecting part and the connecting pipe connecting part.

In this embodiment, the adapter structure further includes: and the supporting component is arranged in the second gas channel and is connected with the first pipe body and the second pipe body so as to support the first pipe body and the second pipe body.

In this embodiment, the support assembly includes a plurality of support rings, the support rings are disposed on the first pipe body, and the plurality of support rings are disposed at intervals along the extending direction of the second gas channel.

In this embodiment, the support ring is formed by the concatenation of a plurality of supporting parts that set gradually around first body, joint between two adjacent supporting parts.

In this embodiment, the support ring includes the main ring body and sets up the location portion on the main ring body, and the internal face contact of location portion and second body is provided with the gaseous hole of dodging that supplies gas to pass through on the location portion, and gaseous hole and the second gas channel intercommunication of dodging.

In this embodiment, the adapter structure further includes: the first wind box is provided with a wind box accommodating cavity and an installation opening communicated with the wind box accommodating cavity, and a protective cover is covered on the installation opening; the second wind box, the second wind box is installed and is held the intracavity at wind box, is provided with the ventilation chamber in the second wind box, the ventilation chamber be used for with first gas passage intercommunication, the clearance between first wind box and the second wind box be used for with second gas passage intercommunication.

In this embodiment, the first wind box includes a first ventilation portion for being abutted with the second pipe body, the second wind box has a second ventilation portion for being abutted with the first pipe body, and the second ventilation portion is arranged in the first ventilation portion in a penetrating manner; a second sealing ring is arranged between the first ventilation portion and the second pipe body in a clamping mode, and a third sealing ring is arranged between the second ventilation portion and the first pipe body in a clamping mode.

In this embodiment, the adapter structure further includes: the heat-insulating sleeve is sleeved outside the second pipe body.

In this embodiment, the connection pipe structure is used for connecting with a fresh air device of a main body of an air-conditioning indoor unit, the first air channel is a dirty air channel, and the second air channel is a fresh air channel.

According to another aspect of the present invention, there is provided an indoor unit of an air conditioner, including a pipe connection structure, wherein the pipe connection structure is the above-mentioned pipe connection structure.

The pipe connecting structure comprises a first pipe body and a second pipe body, wherein a pipe cavity of the first pipe body is a first gas channel, the second pipe body is sleeved outside the first pipe body, a gap between the second pipe body and the first pipe body forms a second gas channel, and meanwhile, at least part of the first pipe body and at least part of the second pipe body can be arranged in a bending mode so as to adjust the position of the pipe connecting structure by bending the first pipe body and the second pipe body, and further the problem that the structure of the pipe connecting structure for fresh air in the prior art is complex 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 partial structural schematic view of an embodiment of a nozzle structure according to the present invention;

FIG. 2 shows an assembled view of a partial structure of the embodiment of the nozzle structure in FIG. 1;

FIG. 3 shows a cross-sectional view of an embodiment of the nozzle arrangement of FIG. 2;

FIG. 4 illustrates an assembled schematic view of the first and second windboxes of an embodiment of a nozzle arrangement according to the present invention;

FIG. 5 shows an exploded view of the first and second windboxes of the nozzle arrangement of FIG. 4;

FIG. 6 is a schematic view illustrating a structure of the present invention in which a pipe connecting structure is inserted into a wall;

FIG. 7 shows a cross-sectional view of the combined piping structure and wall structure of FIG. 6;

fig. 8 is a schematic structural view showing an embodiment of an indoor unit of an air conditioner of the present invention;

fig. 9 shows a side view of an embodiment of the air conditioning indoor unit of the present invention;

fig. 10 shows a top view of an embodiment of the air conditioning indoor unit of the present invention;

fig. 11 shows a schematic view of an indoor joint part of the nozzle structure of fig. 1;

fig. 12 shows a schematic view of the support ring of the nozzle structure of fig. 1.

Wherein the figures include the following reference numerals:

10. a first pipe body; 20. a second tube body; 30. an indoor joint member; 31. a first connection portion; 32. a second connecting portion; 33. a third connecting portion; 331. a buckle component; 40. a first seal ring; 50. a chucking member; 60. a support assembly; 61. a support ring; 611. a support portion; 612. a main ring body; 613. a positioning part; 614. a gas avoidance hole; 70. a first wind box; 71. a wind box accommodating cavity; 72. an installation opening; 73. a protective cover; 74. a first ventilation portion; 80. a second wind box; 81. a second ventilation section; 91. a second seal ring; 92. a third seal ring; 93. a heat-insulating sleeve; 100. a main body; 120. a fresh air device; 130. a wall body.

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 connection structure, please refer to fig. 1 to 11, which includes: a first tube 10, wherein a tube cavity of the first tube 10 is a first gas channel; the second tube body 20 is sleeved outside the first tube body 10, and a second gas channel is formed in a gap between the second tube body 20 and the first tube body 10; wherein, at least part of the first body 10 and at least part of the second body 20 are arranged in a bending manner, so that the position of the connecting pipe structure can be adjusted by bending the first body 10 and the second body 20.

The connecting pipe structure comprises a first pipe body 10 and a second pipe body 20, a pipe cavity of the first pipe body 10 is a first gas channel, the second pipe body 20 is sleeved on the outer side of the first pipe body 10, a gap between the second pipe body 20 and the first pipe body 10 forms a second gas channel, meanwhile, at least part of the first pipe body 10 and at least part of the second pipe body 20 can be arranged in a bending mode, so that the position of the connecting pipe structure can be adjusted by bending the first pipe body 10 and the second pipe body 20, and the problem that the structure of the connecting pipe structure of fresh air in the prior art is complex is solved.

Preferably, the first pipe 10 is a flexible hose, and the second pipe 20 is a plastic bellows or a flexible hose. Other forms of the first and

second tubes

10 and 20 may be used as appropriate.

Specifically, the second tube 20 (the fresh air duct) is a circular blow-molded tube, and materials having bending properties such as EVA, modified PP, modified PE, PVC, and PA can be used. The circumference of the circular blow molding pipe is provided with thread textures, so that the bending capacity and the bending strength of the hose are improved, and the hose is prevented from being flattened due to external force.

In this embodiment, as shown in fig. 8 to 10, the connection pipe structure is used for connecting with the main body 100 of the air-conditioning indoor unit so that the main body 100 of the air-conditioning indoor unit communicates with the outside of the room through the connection pipe structure, and the connection pipe structure further includes: the indoor joint member 30 is provided on the first pipe 10 and the second pipe 20 on the side close to the main body 100 of the air conditioning indoor unit so that the first pipe 10 and the second pipe 20 are connected to the main body 100 of the air conditioning indoor unit via the indoor joint member 30. By providing the indoor joint member 30, it is possible to easily detachably connect the nozzle structure and the main body 100.

In order to realize the connection between the indoor joint member 30 and the first and

second pipe bodies

10 and 31, as shown in fig. 11, the indoor joint member 30 includes a first connection portion 31 and a second connection portion 32 located outside the first connection portion 31, the first connection portion 31 is fitted around the first pipe body 10 and communicates with the first gas passage, the second pipe body 20 is fitted around the second connection portion 32, and a gap between the second connection portion 32 and the first connection portion 31 communicates with the second gas passage.

In this embodiment, as shown in fig. 1, the adapter structure further includes: and a first seal ring 40, wherein the first seal ring 40 is arranged in the first connecting part 31 and is clamped between the end surface of the first pipe 10 and the inner wall surface of the first connecting part 31. By providing the first seal ring 40 and interposing the first seal ring 40 between the first pipe 10 and the first connection portion 31, it is possible to relatively easily seal between the first pipe 10 and the first connection portion 31.

Preferably, the cavity of the first connecting portion 31 is a stepped hole, and the first sealing ring 40 is limited at the stepped surface of the stepped hole. The first seal ring 40 can be relatively easily sealed by making the cavity of the first connection portion 31 a stepped hole.

In this embodiment, the main body 100 of the air conditioning indoor unit has a connection pipe connection part, and the connection pipe structure further includes a third connection part 33, where the third connection part 33 is connected to the second connection part 32, and the third connection part 33 is used for being connected to the connection pipe connection part.

Specifically, a clamping groove portion is formed in the connecting pipe connecting portion, and a clamping part 331 matched with the clamping groove portion is arranged on the third connecting portion 33, so that the third connecting portion 33 and the connecting pipe connecting portion can be detachably connected through clamping of the clamping part 331 and the clamping groove portion.

As shown in fig. 1, the adapter structure further includes: and the clamping component 50, wherein the clamping component 50 is arranged in the cavity of the third connecting part 33, and the clamping component 50 is clamped between the third connecting part 33 and the connecting pipe connecting part.

In order to support the first pipe 10 and the second pipe 20, as shown in fig. 1, the nozzle structure further includes: and a support assembly 60, the support assembly 60 being disposed in the second gas passage and connected to both the first pipe 10 and the second pipe 20 to support the first pipe 10 and the second pipe 20.

The support assembly 60 in this embodiment is in a specific form, as shown in fig. 1, the support assembly 60 includes a plurality of support rings 61, the support rings 61 are sleeved on the first pipe 10, and the plurality of support rings 61 are arranged at intervals along the extending direction of the second gas passage.

In this embodiment, the support ring 61 is formed by splicing a plurality of supporting portions 611 sequentially arranged around the first pipe 10, and two adjacent supporting portions 611 are clamped. Preferably, a bayonet is provided on one support portion 611, and a buckle matched with the bayonet is provided on the other support portion 611 adjacent to the bayonet, so as to realize the clamping connection of the two.

In order to communicate the second gas passage, as shown in fig. 12, the support ring 61 includes a main ring body 612 and a positioning portion 613 provided on the main ring body 612, the positioning portion 613 is in contact with an inner wall surface of the second pipe 20, a gas avoiding hole 614 through which gas passes is provided on the positioning portion 613, and the gas avoiding hole 614 communicates with the second gas passage.

In order to facilitate air exchange with the outdoor space, as shown in fig. 4 and 5, the connection pipe structure further includes: the first wind box 70 is provided with a wind box accommodating cavity 71 and a mounting opening 72 communicated with the wind box accommodating cavity 71, and a protective cover 73 is covered on the mounting opening 72; second wind box 80, second wind box 80 install in wind box holds chamber 71, are provided with the ventilation chamber in the second wind box 80, and the ventilation chamber is used for communicating with first gas passage, and the clearance between first wind box 70 and the second wind box 80 is used for communicating with second gas passage.

Specifically, as shown in fig. 5, the first wind box 70 includes a first ventilating portion 74 for interfacing with the second pipe 20, the second wind box 80 has a second ventilating portion 81 for interfacing with the first pipe 10, and the second ventilating portion 81 is disposed through the first ventilating portion 74; a second seal ring 91 is interposed between the first ventilation portion 74 and the second pipe body 20, and a third seal ring 92 is interposed between the second ventilation portion 81 and the first pipe body 10.

In order to keep the first pipe 10 and the second pipe 20 warm, as shown in fig. 1 and 2, the pipe connection structure further includes: the heat preservation sleeve 93, the heat preservation sleeve 93 cover is established in the outside of second body 20.

The specific application of the pipe connection structure of this embodiment is that the pipe connection structure is used to connect with the fresh air device 120 of the main body 100 of the indoor unit of the air conditioner, the first air channel is a dirty air channel, and the second air channel is a fresh air channel.

The invention also provides an air-conditioning indoor unit, which comprises the connecting pipe structure.

According to the connecting pipe structure, the first pipe body and the second pipe body are designed into the sleeve structure, so that the problems that after-sale installation and punching are large in quantity, and the connecting pipe cannot be bent are solved.

The invention designs an air pipe assembly with two pipes in one hole, which is used for transmitting fresh air and dirty air, wherein a large pipe is a fresh air pipe, a small pipe is an exhaust pipe for separating the fresh air from the dirty air, and a sleeve structure is designed. A heat-insulating connecting pipe method for the total-heat fresh air conditioner is also designed, and the fresh air pipe is wrapped by a heat-insulating sleeve. In addition, the invention designs a pipe connecting method of a secondary heat exchange total-heat fresh air conditioner.

The sleeve pipe connecting component is connected with the indoor air conditioner and the outdoor rain cover component, and plays a role in conveying fresh air entering and dirty air discharging.

The sleeve union subassembly comprises insulation support, fresh air pipe, exhaust pipe, indoor joint (indoor joint part 30), foam joint (chucking part 50), a plurality of support frame, exhaust pipe sealing rubber circle. The exhaust pipe (first body 10) is the flexible hose that can stretch out and draw back to the steel wire of spiral is the skeleton, toughness such as outside parcel one deck PVC, and the material that mobility is good can be according to the demand extension or shorten. One end of the exhaust pipe in the room is connected by an indoor joint through screw threads, and in order to prevent exhaust air from leaking outside, a sealing rubber ring of the exhaust pipe is added at the bottom of the indoor joint before screw thread connection. Finally, the exhaust pipe and the indoor joint are sealed and fixed by glue to prevent the exhaust pipe from rotating. The outer loop of indoor joint passes through the fixed fresh air pipe of glue (second body 20), prevents that fresh air from spilling.

The heat preservation sleeve wraps up on circular blow molding pipe surface, has two effects:

firstly, the fresh air pipe (circular blowing pipe) is protected, the appearance is elegant, and the grade of the total-heat fresh air conditioner is increased. The fresh air pipe needs to penetrate through a wall hole, so that the fresh air pipe is easy to wear, and the fresh air pipe cannot be damaged by adding the heat-insulating sleeve;

secondly, the heat preservation effect, in chilly winter, the chilly new trend of follow introduction, indoor temperature is higher, does not wrap up the insulating sleeve, exposes indoor inner fresh air pipe surface and can produce the condensation water, drips the floor in the customer's house on, wraps up insulating sleeve fresh air pipe and can not produce the comdenstion water.

The fresh air pipe and the exhaust pipe are supported by a support ring 61, so that the exhaust pipe is centered. The two supporting parts 611 are butted and fixed on the exhaust pipe through the buckles, and the fixed supporting parts cannot rock back and forth on the exhaust pipe. The number of support rings is determined by the length of the fresh air duct.

The outdoor end of the sleeve structure pipe connecting component is connected with the rain cover component through threaded connection. The rain cover component consists of a rain cover, an outdoor air outlet box (a second air box), a fresh air box (a first air box), a fresh air pipe sealing rubber ring and an exhaust pipe sealing rubber ring.

The fresh air component is provided with an indoor fresh air inlet and an indoor air outlet. Indoor fresh air inlet draw-in groove is inserted through 2 joint buckles to indoor joint's outer loop, can press down when after sale dismantlement and connect the buckle to dismantle and press the position, easily deviate from.

The exhaust pipe of the pipe connecting component, the indoor exhaust outlet and the outdoor exhaust box form a dirty air channel, and the fresh air pipe of the pipe connecting component, the indoor fresh air inlet and the outdoor fresh air box form a fresh air channel.

The length of new tuber pipe is cut according to the thickness of wall body 130, and the one end of being connected with outdoor rain-proof cover subassembly can be cut, and the one end of being connected with indoor air conditioner can not cut.

When the connecting pipe component is installed on the wall, the angle of downward inclination is required to be kept between the connecting pipe component and the wall, and the indoor side of the hole is higher than the outdoor side of the hole, so that the rainwater is prevented from flowing backwards.

In the hot summer, the air temperature of fresh air pipe is very high, and dirty wind from indoor exhaust passes through from the exhaust pipe, and the temperature is very low, through the cooling of exhaust pipe, and the fresh air temperature that flows to total heat exchange core can reduce, plays the effect of heat transfer in advance. On the contrary, in chilly winter, cold air gets into the fresh air pipe, and the dirty wind that the temperature is high passes through the exhaust pipe, and cold air improves the problem of new trend through cold and hot exchange, then gets into indoor total heat exchange core.

By adopting the sleeve pipe structure, the pipe connecting component can realize the functions of introducing fresh air and discharging dirty air only by drilling a hole on the wall. Simultaneously when the installation use ripple blow molding new trend hose and exhaust pipe that can stretch out and draw back can the hose of bending, can reduce the area that the air conditioner occupy the house, make things convenient for after-sales installation and maintenance. The rain-proof cover assembly is matched with the pipe connecting part for use, so that rainwater cannot flow back indoors, and the purpose of rainwater backflow prevention is achieved. The heat-insulating sleeve of the connecting pipe component generates condensed water, and the sleeve of the fresh air pipe and the exhaust pipe are matched to play a role in secondary heat exchange.

In addition, the fresh air pipe can use a blow molding pipe or other form hoses with smooth inner wall and corrugated or threaded outer wall, and the smooth inner wall can reduce wind resistance and improve fresh air volume.

The large pipe of the connecting pipe part of the sleeve structure can be a fresh air pipe and can also be an exhaust pipe. The large pipe can adopt a flexible hose, and the bending capacity of the flexible hose is higher than that of the corrugated blow-molded pipe. The large pipe and the small pipe are simultaneously installed after sale by adopting the telescopic hoses without cutting, so that a client can extend and shorten according to the requirement, and the after-sale installation cost is reduced.

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 of high cost and large punching quantity of after-sale installation punching are solved;

2. the problem that the connecting pipe cannot be bent is solved;

3. the problem of the heat exchange efficiency low is arranged in new trend, the air exhaust.

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 nozzle arrangement, comprising:

the tube cavity of the first tube body (10) is a first gas channel;

the second pipe body (20), the second pipe body (20) is sleeved on the outer side of the first pipe body (10), and a second gas channel is formed in a gap between the second pipe body (20) and the first pipe body (10);

wherein at least part of the first pipe body (10) and at least part of the second pipe body (20) can be arranged in a bending way, so that the position of the connecting pipe structure can be adjusted by bending the first pipe body (10) and the second pipe body (20).

2. Nozzle structure according to claim 1, characterized in that said first tube (10) is a bellows and said second tube (20) is a plastic bellows or bellows.

3. The nozzle structure according to claim 1, wherein the nozzle structure is adapted to be connected to a main body (100) of an air-conditioning indoor unit so that the main body (100) of the air-conditioning indoor unit communicates with the outside of a room through the nozzle structure, and further comprising:

and an indoor joint member (30) provided on the side of the first pipe (10) and the second pipe (20) close to the main body (100) of the air conditioning indoor unit, the indoor joint member (30) being configured such that the first pipe (10) and the second pipe (20) are connected to the main body (100) of the air conditioning indoor unit via the indoor joint member (30).

4. A joint pipe structure according to claim 3, wherein the indoor joint member (30) comprises a first connecting portion (31) and a second connecting portion (32) located outside the first connecting portion (31), the first connecting portion (31) being fitted over the outside of the first pipe body (10) and communicating with the first gas passage, the second pipe body (20) being fitted over the outside of the second connecting portion (32), and a gap between the second connecting portion (32) and the first connecting portion (31) communicating with the second gas passage.

5. The nozzle structure of claim 4, further comprising:

and a first seal ring (40), wherein the first seal ring (40) is arranged in the first connecting part (31) and is clamped between the end surface of the first pipe body (10) and the inner wall surface of the first connecting part (31).

6. The nozzle arrangement according to claim 5, wherein the cavity of the first connection portion (31) is a stepped bore, and the first sealing ring (40) is limited at a stepped surface of the stepped bore.

7. The piping structure according to claim 4, wherein the main body (100) of the air-conditioning indoor unit has a piping connection part, the piping structure further comprising a third connection part (33), the third connection part (33) being connected with the second connection part (32), the third connection part (33) being for connection with the piping connection part.

8. The nozzle structure according to claim 7, wherein a locking groove is provided on the nozzle connecting portion, and a locking member (331) is provided on the third connecting portion (33) to be engaged with the locking groove, so that the third connecting portion (33) is detachably connected to the nozzle connecting portion by locking the locking member (331) to the locking groove.

9. The nozzle structure of claim 7, further comprising:

the clamping component (50) is arranged in the cavity of the third connecting portion (33), and the clamping component (50) is clamped between the third connecting portion (33) and the connecting pipe connecting portion.

10. The nozzle structure according to claim 1, further comprising:

a support assembly (60), the support assembly (60) being disposed within the second gas passage and connected to both the first tube (10) and the second tube (20) to support the first tube (10) and the second tube (20).

11. Nozzle arrangement according to claim 10, wherein the support assembly (60) comprises a plurality of support rings (61), the support rings (61) being arranged around the first pipe body (10), the plurality of support rings (61) being arranged at intervals in the extension direction of the second gas channel.

12. Nozzle structure according to claim 11, wherein said support ring (61) is made by splicing a plurality of supports (611) arranged in sequence around said first tubular body (10), and two adjacent supports (611) are clamped together.

13. The nozzle structure according to claim 11, wherein the support ring (61) comprises a main ring body (612) and a positioning portion (613) provided on the main ring body (612), the positioning portion (613) is in contact with an inner wall surface of the second pipe body (20), a gas avoiding hole (614) through which gas passes is provided on the positioning portion (613), and the gas avoiding hole (614) is communicated with the second gas passage.

14. The nozzle structure according to claim 1, further comprising:

the first wind box (70) is provided with a wind box accommodating cavity (71) and a mounting opening (72) communicated with the wind box accommodating cavity (71), and a protective cover cap (73) is covered on the mounting opening (72);

second wind box (80), second wind box (80) are installed in wind box holds chamber (71), be provided with the ventilation chamber in second wind box (80), the ventilation chamber be used for with first gas passage intercommunication, first wind box (70) with clearance between second wind box (80) be used for with second gas passage intercommunication.

15. The nozzle arrangement according to claim 14, wherein the first bellows (70) comprises a first vent portion (74) for interfacing with the second pipe (20), the second bellows (80) having a second vent portion (81) for interfacing with the first pipe (10), the second vent portion (81) being disposed through the first vent portion (74); a second sealing ring (91) is arranged between the first ventilating part (74) and the second pipe body (20), and a third sealing ring (92) is arranged between the second ventilating part (81) and the first pipe body (10).

16. The nozzle structure according to claim 1, further comprising:

the heat-insulating sleeve (93), heat-insulating sleeve (93) cover is established the outside of second body (20).

17. The nozzle structure according to claim 1, wherein the nozzle structure is used for connecting with a fresh air device (120) of a main body (100) of an air-conditioning indoor unit, the first air channel is a dirty air channel, and the second air channel is a fresh air channel.

18. An indoor unit of an air conditioner, comprising a joint pipe structure, characterized in that the joint pipe structure is the joint pipe structure of any one of claims 1 to 17.