CN204902177U - Air conditioning unit drainage assembly and air conditioner that has it - Google Patents

Abstract

The utility model discloses an air conditioner unit drainage assembly and an air conditioner with the same, wherein the air conditioner unit drainage assembly comprises: a condensed water tray, the condensed water tray has a drain port; a drain pipe, the first end of which is connected to the drain port , the second end of the drain pipe is the water outlet; anti-air backflow device, the anti-air backflow device is set between the drain port and the drain pipe or on the drain pipe, and the anti-air backflow device is located at the first end of the condensate pan to the drain pipe When the two ends are in circulation, the drain pipe is connected, and the anti-air backflow device closes the drain pipe when the second end of the drain pipe has gas flowing into the drain outlet. According to the air conditioning unit drainage assembly of the utility model, it not only ensures the normal drainage of the system, but also prevents the dirty gas in the sewer from entering the air conditioning unit due to backflow. quality.

Description

Air conditioning unit drain assembly and air conditioner having same

technical field

The utility model relates to the technical field of air conditioners, in particular to an air conditioner unit drainage assembly and an air conditioner with the same.

Background technique

A condensate pan is placed under the heat exchanger components of the air conditioning unit to receive the condensed water falling from the fins of the heat exchanger. The condensed water in the condensate pan is discharged out of the unit through the drain pipe. Generally speaking, the air conditioner A water trap is specially installed outside the drain pipe, and a floor drain is installed inside the unit to facilitate the discharge of condensed water and the discharge of sewage when cleaning the unit.

Since the drain pipe is connected to the floor drain, the odor from the sewer will communicate with the unit. If not treated, the gas will enter the air conditioner and pollute the indoor air. The drainage method of the air conditioning unit in the related art is that when there is enough condensed water, it can isolate the odor and toxic gas in the sewer, but when there is little condensed water, or even no condensed water at all, due to the negative pressure of the air conditioning unit As a result, the odor of the sewer will flow back into the unit and further into the room, thereby polluting the indoor air.

Utility model content

The utility model aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, the utility model proposes an air-conditioning unit drainage assembly, which has a simple structure and can ensure air quality.

The utility model also proposes an air conditioner with the above-mentioned drainage assembly of the air conditioner unit.

According to the first aspect of the utility model, the drainage assembly of the air conditioner unit includes: a condensed water pan, the condensed water pan has a drain port; a drain pipe, the first end of the drain pipe is connected to the drain port, and the drain pipe The second end of is the water outlet; anti-air backflow device, the anti-air backflow device is set between the drain port and the drain pipe or on the drain pipe, the air backflow prevention device is on the condensation When the water in the water pan flows to the second end of the drain pipe, the drain pipe is connected, and the air backflow prevention device closes the drain pipe when the second end of the drain pipe has air flowing into the drain port. Tube.

According to the drainage assembly of the air conditioner unit of the utility model, by setting the anti-air backflow device between the outlet and the drain pipe or on the drain pipe, the anti-air backflow device can be opened or closed according to the water storage situation in the drain pipe and the drainage situation of the system. The outlet not only ensures the normal drainage of the system, but also prevents the sewage in the sewer from entering the air conditioning unit due to reverse flow. The drainage assembly of the air conditioning unit has a simple structure, which can ensure air quality and improve air quality.

According to an embodiment of the present utility model, the anti-air backflow device is arranged between the first end of the drain pipe and the drain port.

According to an embodiment of the present utility model, the anti-air backflow device includes: a connecting pipe, a water flow channel is defined in the connecting pipe, one end of the connecting pipe communicates with the drain outlet, and the other end communicates with the outlet of the drain pipe. The first end communicates; a floating ball, the floating ball is movably arranged in the water flow channel, and the floating ball leads to the water flow channel when the drain port discharges water to the drain pipe, and the floating ball When the second end of the drain pipe has gas flowing into the drain port, the water flow channel is cut off.

According to an embodiment of the present invention, the connecting pipe includes: a first pipe section, the first pipe section communicates with the drain outlet; a second pipe section, the second pipe section communicates with the first end of the drain pipe ; the third pipe section, the third pipe section is located between the first pipe section and the second pipe section and the two ends of the third pipe section communicate with the first pipe section and the second pipe section respectively, the The third pipe section together with the first pipe section and the second pipe section define the water flow channel, the radial dimension of at least a part of the third pipe section is greater than the radial dimension of the first pipe section, and the floating The radial dimension of the ball is larger than the radial dimension of the first pipe section, and the floating ball is movably arranged in the third pipe section.

According to an embodiment of the present invention, the radial dimension of the third pipe section gradually increases from the first pipe section to the direction where the second pipe section is located.

According to an embodiment of the present invention, the radial dimension of the first pipe section is equal to the radial dimension of the second pipe section, and the radial dimension of the floating ball is larger than the smallest radial dimension of the third pipe section.

According to an embodiment of the present invention, the anti-air backflow device further includes a strong line, one end of the strong line is connected to an end of the first pipe section adjacent to the drain outlet, and the other end of the strong line is connected to The floating balls are connected, and the length of the strong line is greater than the length of the first pipe section.

According to an embodiment of the present invention, the third pipe section is provided with an installation hole communicating with the outside world, and the anti-air backflow device further includes: a floating ball installation cover, and the floating ball installation cover is detachably installed on the on the mounting hole.

According to an embodiment of the present utility model, the first pipe section, the second pipe section and the third pipe section are integrally formed.

The air conditioner according to the second aspect of the utility model includes the air conditioner unit drainage assembly according to the above embodiment.

Description of drawings

Fig. 1 is a schematic structural view of an air conditioning unit drainage assembly according to an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of an air conditioning unit drainage assembly according to yet another embodiment of the present invention;

Fig. 3 is a structural schematic diagram of an air-conditioning unit drainage assembly according to yet another embodiment of the present invention;

Fig. 4 is a schematic structural view of an air conditioning unit drainage assembly according to another embodiment of the present invention;

Fig. 5 is a schematic structural view of the anti-air backflow device of the air-conditioning unit drainage assembly according to an embodiment of the present invention;

Fig. 6 is a structural schematic diagram of the anti-air backflow device of the air-conditioning unit drainage assembly according to another embodiment of the present invention;

Fig. 7 is a schematic structural view of the anti-air backflow device of the air-conditioning unit drainage assembly according to another embodiment of the utility model.

Reference signs:

Air conditioning unit drainage assembly 100;

Condensed water tray 10; drain port 11;

drain pipe 20; first end 21; second end 22; water trap 23;

Anti-air backflow device 30; connecting pipe 31; water flow channel 310; first pipe section 311; second pipe section 312; third pipe section 313; installation hole 3131;

Detailed ways

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

The air conditioning unit drainage assembly 100 according to the embodiment of the first aspect of the present utility model will be described in detail below with reference to FIGS. 1 to 7 .

As shown in FIGS. 1 to 4 , an air conditioner unit drainage assembly 100 according to an embodiment of the present invention includes a condensed water pan 10 , a drain pipe 20 and an air backflow prevention device 30 . Specifically, the condensate pan 10 has a drain port 11, the first end 21 of the drain pipe 20 is connected to the drain port 11, the second end 22 of the drain pipe 20 is a water outlet, and the anti-air backflow device 30 is arranged between the drain port 11 and the drain port 11. Between the drain pipes 20 or on the drain pipe 20, the anti-air backflow device 30 is connected to the drain pipe 20 when the water in the condensed water pan 10 flows to the second end 22 of the drain pipe 20, and the air backflow prevention device 30 is connected to the drain pipe 20. The second end 22 of the second end 22 closes the drain pipe 20 when gas flows into the drain port 11 .

In other words, the drain assembly 100 of the air conditioner unit is mainly composed of a condensate pan 10, a drain pipe 20 and an anti-air backflow device 30, wherein the condensate pan 10 is provided with a drain port 11, and at least a part of the drain pipe 20 forms a water trap 23. To store condensed water, the anti-air backflow device 30 can be arranged on the drain pipe 20, or between the drain outlet 11 and the drain pipe 20. When the air backflow prevention device 30 is arranged between the drain outlet 11 and the drain pipe 20, The two ends of the anti-air backflow device 30 are connected to the drain port 11 and one end of the drain pipe 20 respectively, and the other end of the drain pipe 20 extends to the sewer; The first end 21 is connected to the drain port 11, and the second end 22 of the drain pipe 20 extends to the sewer.

As shown in Figure 4, in this embodiment, the condensed water tray 10 discharges condensed water from the drain port 11, and the anti-air backflow device 30 is turned on so that the condensed water can be discharged from the drain port 11 to the drain pipe 20; as shown in Figure 1 As shown in FIG. 2, in this embodiment, there is no condensed water or insufficient condensed water stored in the water trap 23 of the drain pipe 20. Since the drain pipe 20 is connected with the sewer, the gas pressure in the drain pipe 20 is relatively high. , the anti-air backflow device 30 blocks between the drain pipe 20 and the drain port 11, so that foul gas such as foul gas and toxic gas in the sewer cannot enter the air conditioning unit from the water outlet of the drain pipe 20; as shown in Figure 3, in In this embodiment, there is enough condensed water stored in the water trap 23, and the condensed water blocks the water outlet 11 from the water outlet, so that the odor and toxic gas in the sewer can be prevented from entering the air conditioning unit from the water outlet of the drain pipe 20.

Therefore, according to the air conditioning unit drainage assembly 100 of the embodiment of the present utility model, by setting the anti-air backflow device 30 between the drain port 11 and the drain pipe 20 or on the drain pipe 20, the air backflow prevention device 30 can Opening or closing the drain outlet 11 not only ensures the normal drainage of the system, but also prevents the sewage in the sewer from entering the air-conditioning unit due to backflow. The air-conditioning unit drainage assembly 100 has a simple structure. It can protect the air quality and improve the air quality.

Specifically, as shown in FIG. 1 , in this embodiment, the anti-air backflow device 30 is arranged between the first end 21 of the drain pipe 20 and the drain port 11, and the first end 21 of the drain pipe 20 passes through the anti-air backflow device. 30 is connected to the drain port 11 of the condensed water tray 10, the second end 22 of the drain pipe 20 forms a water outlet and extends downward to the sewer along the vertical direction (up and down direction as shown in Figure 1), and the middle part of the drain pipe 20 forms a water outlet. Trap 23 lower than water outlet 11.

Thus, by installing the anti-air backflow device 30 between the first end 21 of the drain pipe 20 and the drain port 11, the connection of the three is convenient, the assembled structure is simple, and this structure can ensure the normal drainage of the system. , It can also prevent the dirty gas in the sewer from entering the air conditioning unit due to backflow, improving the indoor air quality.

Among them, according to an embodiment of the present utility model, the anti-air backflow device 30 includes a connecting pipe 31 and a floating ball 32, the connecting pipe 31 defines a water flow channel 310, one end of the connecting pipe 31 communicates with the drain port 11, and the other end communicates with the drain port 11. The first end 21 of the pipe 20 is connected, and the floating ball 32 is movably arranged in the water flow channel 310. When the two ends 22 have gas flowing into the water outlet 11 , the water flow channel 310 is disconnected.

As shown in Figures 1 to 4, the anti-air backflow device 30 is mainly composed of a connecting pipe 31 and a floating ball 32. A water flow channel 310 is defined in the connecting pipe 31, and the floating ball 32 is movably arranged in the water flow channel 310. When condensation When the water tray 10 is draining, the floating ball 32 connects the drain port 11 with the water flow channel 310, so that the condensed water is discharged through the drain pipe 20, and when the condensed water is not drained, if there is no condensed water in the drain pipe 20 or the condensed water is insufficient When measuring, because the air pressure in the drain pipe 20 is greater than the air pressure in the air-conditioning unit, the floating ball 32 will seal the drain 11 to prevent the sewage in the sewer from entering the air-conditioning unit through the drain 11, which not only ensures the normal drainage of the system, but also It can prevent the sewage in the sewer from entering the air conditioning unit due to reverse flow; if there is a sufficient amount of condensed water at the trap 23 of the drain pipe 20, the condensed water at this place can connect the drain port 11 with the water outlet of the drain pipe 20 barrier to prevent the sewage in the sewer from entering the air-conditioning unit. The air-conditioning unit drainage assembly 100 has a simple structure, which can ensure air quality and improve air quality.

Further, as shown in FIGS. 5 to 7 , the connecting pipe 31 includes a first pipe section 311 , a second pipe section 312 and a third pipe section 313 . Specifically, the first pipe section 311 communicates with the drain outlet 11, the second pipe section 312 communicates with the first end 21 of the drain pipe 20, the third pipe section 313 is arranged between the first pipe section 311 and the second pipe section 312, and the third pipe section The two ends of 313 communicate with the first pipe section 311 and the second pipe section 312 respectively, the third pipe section 313 and the first pipe section 311 and the second pipe section 312 jointly define the water flow channel 310, and the radial dimension of at least a part of the third pipe section 313 is larger than The radial dimension of the first pipe section 311 and the radial dimension of the floating ball 32 are larger than the radial dimension of the first pipe section 311 , and the floating ball 32 is movably arranged in the third pipe section 313 .

That is to say, the connecting pipe 31 is mainly composed of a first pipe section 311, a second pipe section 312 and a third pipe section 313, wherein the two ends of the third pipe section 313 are respectively connected with the first pipe section 311 and the second pipe section 312, and the first pipe section 311, the second pipe section 312 and the third pipe section 313 communicate with each other, and the other end of the first pipe section 311 communicates with the drain outlet 11, and the other end of the second pipe section 312 communicates with the drain pipe 20, and the floating ball 32 is movably located at In the third pipe section 313 , the diameter of the floating ball 32 is larger than the radial dimension of the first pipe section 311 .

Specifically, as shown in FIG. 5, in this embodiment, the diameter of the floating ball 32 is larger than the radial dimensions of the first pipe section 311 and the second pipe section 312, and the radial dimension of at least a part of the third pipe section 313 is larger than that of the first pipe section 313. The radial dimension of the pipe section 311, the floating ball 32 is movably arranged in the third pipe section 313, when the condensed water pan 10 discharges the condensed water from the drain port 11, the float ball 32 of the anti-air backflow device 30 will conduct the drain port 11 so that the condensed water can be discharged from the drain port 11 to the drain pipe 20; when there is no condensed water or insufficient condensed water is stored in the trap 23, due to the high gas pressure in the drain pipe 20, the anti-air backflow device The floating ball 32 of 30 is blocked at the connection position between the first pipe section 311 and the third pipe section 313, and blocks the drain pipe 20 from the drain outlet 11, so that the foul gas such as foul gas and toxic gas in the sewer cannot pass through the drain pipe 20. The water outlet of the drain enters the air-conditioning unit; when there is enough condensed water stored in the trap 23, the condensed water will block the drain 11 and the water outlet, so as to prevent the odor and toxic gas in the sewer from entering from the outlet of the drain pipe 20 Inside the air conditioning unit.

In some specific implementations of the present invention, the radial dimension of the third pipe section 313 gradually increases from the first pipe section 311 to the direction where the second pipe section 312 is located. As shown in Figure 6, the third pipe section 313 extends in the horizontal direction (left-right direction as shown in Figure 6), the radial dimension of the left end of the third pipe section 313 is smaller than the radial dimension of the right end of the third pipe section 313, and the third pipe section 313 The radial dimension of the pipe section 313 gradually increases from the first pipe section 311 to the direction where the second pipe section 312 is located, that is, the third pipe section 313 is formed as a tapered pipe.

Optionally, as shown in FIG. 5, the radial dimension of the middle part of the third pipe section 313 is greater than the radial dimension of both ends of the third pipe section 313, and the diameter of the float 32 is greater than the radial dimension of the two ends of the third pipe section 313, Prevent the floating ball 32 from detaching from the third pipe section 313, so that the floating ball 32 can adjust its position in a timely manner according to the air pressure in the system, which not only ensures the normal drainage of the system, but also prevents the sewage in the sewer from entering the air conditioning unit due to reverse flow , the air-conditioning unit drainage assembly 100 has a simple structure, which can ensure air quality and improve air quality.

Preferably, the radial dimension of the first pipe section 311 is equal to the radial dimension of the second pipe section 312 , and the radial dimension of the floating ball 32 is larger than the smallest radial dimension of the third pipe section 313 . In this way, the floating ball 32 can be prevented from detaching from the third pipe section 313, and the floating ball 32 can be moved in the third pipe section 313, so that the normal drainage of the system can be realized, and the sewage in the sewer can be prevented from entering due to reverse flow. In the air-conditioning unit, the drainage assembly 100 of the air-conditioning unit has a simple structure, which can ensure air quality and improve air quality.

In some other specific embodiments of the present utility model, the anti-air backflow device 30 also includes a strong line 33, one end of the strong line 33 is connected to one end of the first pipe section 311 adjacent to the drain port 11, and the other end of the strong line 33 is connected to the buoy The balls 32 are connected, and the length of the strong line 33 is greater than the length of the first pipe section 311 .

In other words, the anti-air backflow device 30 is mainly composed of a connecting pipe 31, a floating ball 32 and a strong wire 33. As shown in FIG. The three pipe sections 313 move to the right, the strong line 33 is straightened, and the float 32 connects the drain port 11 so that condensed water can be discharged from the drain port 11 to the drain pipe 20. At this time, if there is enough water stored in the trap 23 When there is condensed water, the condensed water will block the drain port 11 and the water outlet, so as to prevent the foul smell and toxic gas in the sewer from entering the air-conditioning unit from the water outlet of the drain pipe 20.

As shown in Figures 1 and 2, when there is no condensed water or insufficient condensed water is stored in the trap 23, due to the high gas pressure in the drain pipe 20, the floating ball 32 moves leftward along the third pipe section 313 , the floating ball 32 of the anti-air backflow device 30 is blocked at the connection position between the first pipe section 311 and the third pipe section 313, and the floating ball 32 blocks between the drain pipe 20 and the water outlet 11, so that the odor and toxic gas in the sewer The dirty gas cannot enter the air-conditioning unit from the water outlet of the drain pipe 20, which improves the air quality.

It should be noted that, when the strength line 33 is provided on the floating ball 32 , the radial dimension of the second pipe section 312 can be smaller than the diameter of the floating ball 32 or larger than or equal to the diameter of the floating ball 32 . Thus, by arranging the strong line 33 on the floating ball 32, the floating ball 32 will not deviate from the moving track when it moves in the connecting pipe 31, so as to ensure the stability of the structure.

In addition, according to an embodiment of the present invention, the third pipe section 313 is provided with an installation hole 3131 that communicates with the outside world, and the anti-air backflow device 30 also includes a floating ball installation cover 34, which is detachably installed on the Mounting hole 3131. Specifically, the radial dimension of the installation hole 3131 on the third pipe section 313 is larger than the diameter of the floating ball 32 , which facilitates the installation, replacement and maintenance of the floating ball 32 . It should be noted that the floating ball 32 of the present invention is relatively light in weight and can be suspended in condensed water to open and close the water outlet 11 in due course.

Preferably, according to an embodiment of the present utility model, the first pipe section 311 , the second pipe section 312 and the third pipe section 313 are integrally formed. The integrally formed structure can not only ensure the structure and performance stability of the connecting pipe 31, but also is convenient to form and simple to manufacture, and saves the assembly parts between the first pipe section 311, the second pipe section 312 and the third pipe section 313, greatly improving The assembly efficiency of the air conditioning unit drainage assembly 100 is improved.

The air conditioner according to the embodiment of the second aspect of the present invention includes the air conditioner unit drainage assembly 100 according to the above embodiments. Since the air conditioner unit drainage assembly 100 according to the embodiment of the present invention has the above-mentioned technical effect, the air conditioner according to the embodiment of the present application also has the above-mentioned technical effect, that is, the air conditioner has a simple structure, can ensure air quality, and improve air quality , to prevent the outside air from polluting the indoor air due to backflow into the air conditioner.

Other configurations and operations of the air conditioner according to the embodiment of the present utility model are known to those skilled in the art and will not be described in detail here.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" The orientation or positional relationship indicated by , "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying the referred device Or elements must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrated; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components , unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature through an intermediary indirect contact. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary, and should not be construed as limitations of the present invention, and those of ordinary skill in the art are within the scope of the present invention. Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (10)

1. an air-conditioner set drain assembly, is characterized in that, comprising:

Condense water disk, described condense water disk has discharge outlet;

Drainpipe, the first end of described drainpipe is connected with described discharge outlet, and the second end of described drainpipe is delivery port;

Air-prevention backflow device, described air-prevention backflow device is located between described discharge outlet and described drainpipe or is located on described drainpipe, described air-prevention backflow device described condense water disk water to described drainpipe second end circulation time conducting described in drainpipe, described air-prevention backflow device closes described drainpipe when the second end of described drainpipe has gas to circulate in described discharge outlet.

2. air-conditioner set drain assembly according to claim 1, is characterized in that, described air-prevention backflow device is located between the first end of described drainpipe and described discharge outlet.

3. air-conditioner set drain assembly according to claim 2, is characterized in that, described air-prevention backflow device comprises:

Tube connector, is limited with water stream channel in described tube connector, and one end of described tube connector is communicated with described discharge outlet, and the other end is communicated with the first end of described drainpipe;

Ball float, described ball float is located in described water stream channel movably, described ball float is in described discharge outlet to water stream channel described in conducting during described drainpipe draining, and described ball float disconnects described water stream channel when the second end of described drainpipe has gas to circulate in described discharge outlet.

4. air-conditioner set drain assembly according to claim 3, is characterized in that, described tube connector comprises:

First pipeline section, described first pipeline section is communicated with described discharge outlet;

Second pipeline section, described second pipeline section is communicated with the first end of described drainpipe;

3rd pipeline section, described 3rd pipeline section is located between described first pipeline section and described second pipeline section and the two ends of described 3rd pipeline section and is communicated with described second pipeline section with described first pipeline section respectively, described 3rd pipeline section and described first pipeline section and described second pipeline section limit described water stream channel jointly, the radial dimension at least partially of described 3rd pipeline section is greater than the radial dimension of described first pipeline section, the radial dimension of described ball float is greater than the radial dimension of described first pipeline section, and described ball float is located in described 3rd pipeline section movably.

5. air-conditioner set drain assembly according to claim 4, is characterized in that, the radial dimension of described 3rd pipeline section increases from described first pipeline section gradually to the second direction, pipeline section place.

6. air-conditioner set drain assembly according to claim 5, is characterized in that, the radial dimension of described first pipeline section equals the radial dimension of described second pipeline section, and the radial dimension of described ball float is greater than the smallest radial size of described 3rd pipeline section.

7. air-conditioner set drain assembly according to claim 4, it is characterized in that, described air-prevention backflow device also comprises powerful line, one end of described powerful line is connected with one end of the described discharge outlet of vicinity of described first pipeline section, the other end of described powerful line is connected with described ball float, and the length of described powerful line is greater than the length of described first pipeline section.

8. air-conditioner set drain assembly according to claim 4, it is characterized in that, described 3rd pipeline section is provided with the installing hole with extraneous conducting, and described air-prevention backflow device also comprises: ball float mounting cover, and described ball float mounting cover is removably mounted on described installing hole.

9. the air-conditioner set drain assembly according to any one of claim 4-8, is characterized in that, described first pipeline section, the second pipeline section and the 3rd pipeline section are integrally formed.

10. an air-conditioner, is characterized in that, comprises the air-conditioner set drain assembly according to any one of claim 1-9.