TWI667438B - Air-guiding tube of an air ventilator - Google Patents

Abstract

An air duct of a ventilation device is used to solve the problem of poor ventilation effect of the conventional air duct. The system includes: a pipe body; an end cover combined with the pipe body; the end cover has a through hole and a water blocking portion; the through hole communicates with the inside of the tube body; the water blocking portion is adjacent to the through hole; The end cover and the outer cover are provided with a vent, and the vent is adjacent to the water blocking part.

Description

Air duct of ventilation device

The invention relates to an air guide tube, in particular to an air guide tube of a ventilation device for providing a circulation ventilation function.

Please refer to FIG. 1, which is a conventional airflow exchange device 9, which can be installed on a partition wall D. The airflow exchange device 9 includes a tube 91, a partition 92, a Shield 93 and the second fan 94. One end of the tube 91 is provided with an air inlet 911 and an air outlet 912; the partition 92 is disposed inside the tube 91 to divide it into a first guide space S1 and a second guide space S2; the shield The cover 93 is fixed on the outer wall of the partition wall D and forms a vent 931. The cover 93 can be used to shield rainwater; the two fans 94 are respectively combined in the first guide space S1 and the second guide space S2. In this way, the airflow exchange device 9 can introduce the airflow of the external space into the internal space, and direct the airflow of the internal space to the external space to provide a circulation ventilation function.

However, although the shield 93 can shield rainwater, the vent 931 of the shield 93 is in communication with the air inlet 911 and the air outlet 912, so that the air inlet 911 and the air outlet 912 are directly connected to the external space; This allows moisture in the external space to easily enter the air inlet 911 and the air outlet 912 through the vent 931. In this way, the airflow exchange device 9 cannot block water or moisture in a timely manner, which results in poor airflow exchange effect of the airflow exchange device 9, which in turn causes the use function of the airflow exchange device 9 to be affected or damaged.

In view of this, the air duct of the conventional ventilation device is indeed still necessary to be improved Want.

In order to solve the above problems, the object of the present invention is to provide an air guide pipe of a ventilation device, which is provided with a water blocking part that can block the water or moisture in the external space and prevent the water or moisture from penetrating into the interior of the pipe, which can avoid The function of the air duct of the ventilation device is affected or damaged.

The following directivity or similar terms of the present invention, such as "front", "rear", "upper (top)", "lower (bottom)", "inner", "outer", "side", etc., mainly With reference to the directions of the attached drawings, each directivity or its approximate terms are only used to help explain and understand the embodiments of the present invention, and are not intended to limit the present invention.

The air guide pipe of the ventilation device of the present invention includes: a pipe body; an end cover combined with the pipe body; The through hole; and an outer cover, the outer cover is provided with a vent, the vent is adjacent to the water blocking portion, the outer cover has an upper jaw portion, the upper jaw portion is adjacent to the vent and located on the side away from the water blocking portion; The through hole has a lowest end at the connection with the water blocking portion. When the vent is facing downward, the upper jaw is lower than the lowest end in the radial direction.

According to this, the air duct of the ventilating device of the present invention has a water blocking part with the end cover, and the water blocking part is adjacent to the vent of the outer cover; the water blocking part can block water or moisture in the external space , To ensure that water or moisture does not penetrate into the inside of the pipe body, thereby providing a good water blocking effect, and thereby preventing the use function of the air duct of the ventilation device from being affected or damaged, so as to provide a good circulation ventilation effect And, it has the effect of ensuring that the water blocking portion can block water or moisture in the external space.

Wherein, the outer cover has a lower jaw portion, the lower jaw portion is adjacent to the vent and the water blocking portion, the outer cover has a connection line at the periphery connecting the lower jaw portion and the upper jaw portion, and the connection line Each of the above is radially below the lowest end. In this way, the department has The water blocking part can block the effect of water or moisture in the external space.

In addition, the air duct of the ventilation device of the present invention includes: a tube body; an end cover combined with the tube body, the end cover has a through hole and a water blocking part, the through hole communicates with the inside of the tube body, the water blocking The portion adjoins the through hole; and an outer cover, the outer cover is provided with a vent, the vent is adjacent to the water blocking portion, the outer cover has a lower jaw portion, the lower jaw portion is adjacent to the vent and used to join the end cap, the water blocking The portion extends from the lower jaw to the direction of the through hole. In this way, the structure is simple and easy to manufacture and assemble, which has the effects of reducing manufacturing costs and improving assembly convenience.

In addition, the air guide tube of the ventilation device of the present invention includes: a tube body; an end cover, combined with the tube body, the end cover has a through hole and a water blocking portion, the through hole communicates with the inside of the tube body, the water blocking The portion is adjacent to the through hole; an outer cover, the outer cover is provided with a vent, the vent is adjacent to the water blocking portion; and a protective net, the protective net is provided between the vent of the outer cover and the through hole of the end cover, The end cover has at least one clip seat, the at least one clip seat is disposed on the water blocking portion, and the protective net is inserted into the at least one clip seat. In this way, the protective net can block foreign substances, which has the effect of ensuring that the foreign substance does not enter the tube through the vent, and the protective net can be firmly combined with the end cap.

Wherein, it also includes a partition, which is connected to the end cover and extends away from the tube body, the partition has a partition section and a flow guide section, the partition section partitions the through hole area into an air inlet And an air outlet, the diversion section faces the vent. In this way, it has the effect that the airflow can be guided by the guide section and lead out the vent along the guide section.

Wherein, the air inlet and the air outlet are located on the same side of the protective net, and the vent of the outer cover is located on the other side of the protective net. In this way, the protective net can block foreign objects, and has the effect of ensuring that foreign objects do not enter the pipe body through the air inlet or the air outlet.

Wherein, the end cover has a ring member and a plate, the ring member is combined with one end of the tube body, the seat plate is connected with the ring member and the partition member is combined. In this way, it has the effect of making the partition easy to be combined with the end cap.

Wherein, the end cover is provided with two lock seats, the two lock seats are connected to the seat plate, and the two lock seats Located on two sides of the partition respectively, the outer cover is provided with two locking holes, and the two locking holes penetrate through the two locking holes to be fixedly coupled to the two locking seats. In this way, it has the effect of enhancing the stability of the combination of the cover and the end cap.

Wherein, the partition is provided with an insertion groove, the insertion groove is opened at the end of the partition away from the end cover, the protective net is provided with a coupling groove, and the protective net is inserted into the insertion groove from the coupling groove to join the partition . In this way, the protective net and the partition can be cross-coupled, which has the effect of improving the stability of the combination of the protective net and the partition.

Wherein, the number of the clip holders is two, the two clip holders are respectively located on two sides of the partition, and the protective net is inserted into the two clip holders. In this way, it has the effect of improving the assembly stability of the protective net.

Wherein, the diversion section divides the vent into a first vent part and a second vent part, the first vent part communicates with the air inlet, and the second vent part communicates with the air outlet. In this way, it has the effect of improving the smoothness of the diversion.

Wherein, the diversion section is aligned with the water blocking part, and the diversion section is curved in an arc shape from the partition section toward the direction of the second ventilation section. In this way, it has the effect of ensuring that the airflow is led out by the second ventilation part.

Wherein, the diversion section forms two diversion surfaces, and the two diversion surfaces are respectively curved toward the arc shape of the second ventilation portion and the first ventilation portion. In this way, the diversion section provides another aspect, which has the effect that the airflow of the first ventilation portion and the airflow of the second ventilation portion can be further separated.

Wherein, the partition has a closed surface in the diversion section, and the closed surface is connected to the two diversion surfaces. In this way, the diversion section provides another aspect, which has the effect of preventing the air flow from forming turbulence at the vent.

Wherein, the diversion section is located between the through hole and the vent. In this way, it has the effect of ensuring that both incoming and outgoing airflow can pass through the diversion section.

Wherein, the end cover has a plurality of water blocking septa, the plurality of water blocking septa are connected to the water blocking part, the plurality of water blocking septa are located between the vent and the air inlet, or the vent and the Between the air outlets, the axial height of each of the several water blocking spacers is smaller than the axial height of the partition. In this way, it has the effect of blocking water or water vapor without affecting the smoothness of the incoming and outgoing wind.

Among them, each of the several water blocking spacers is inclined downward. In this way, it has the effect of improving the blocking of water or moisture.

Wherein, the number of the water blocking spacers provided between the vent and the air inlet is four, and the first and second water blocking spacers of the four water blocking spacers are respectively connected by one end. In the position between the vent and the protective net, the other end of the first water blocking spacer is aligned to the two ends of the third water blocking spacer among the four water blocking spacers, and the second water blocking The other end of the spacer is positioned between the two ends of the fourth water-blocking spacer of the four water-blocking spacers. In this way, to form two S-shaped channels, it has the effect of enhancing the blocking of water or water vapor.

Wherein, the end cover has a ring member and a plate, the ring member is coupled to one end of the tube body, the seat plate is connected to the ring member and the separator is combined, and one end of the third water blocking spacer is connected to the separator , One end of the fourth water blocking spacer is connected to the ring. In this way, it is ensured that the water or water vapor passes through the four water blocking spacers before entering the air inlet, which has the effect of enhancing the water or water vapor blocking.

Wherein, the partition and the end cover are integrally connected. In this way, it has the effect of increasing structural strength.

Wherein, the height of the water blocking part is greater than the depth of the vent. In this way, it has the effect of ensuring that the water blocking portion can block water or moisture in the external space.

〔this invention〕

1‧‧‧tube

2‧‧‧End cover

21‧‧‧ring

22‧‧‧seat board

221‧‧‧Through hole

221a‧‧‧Air inlet

221b‧‧‧Outlet

222‧‧‧Water Retaining Department

23‧‧‧Clamp seat

24‧‧‧lock seat

25‧‧‧Water blocking septa

25a‧‧‧The first water blocking diaphragm

25b‧‧‧Second water blocking spacer

25c‧‧‧The third water blocking diaphragm

25d‧‧‧The fourth water blocking diaphragm

3‧‧‧Outer cover

31‧‧‧Ventilation

31a‧‧‧First Ventilation Department

31b‧‧‧Second Ventilation Department

32‧‧‧jaw

33‧‧‧Keyhole

34‧‧‧Lock firmware

35‧‧‧ Upper jaw

4‧‧‧Protection net

41‧‧‧Combination ditch

5‧‧‧Partition

51‧‧‧ Separation section

52‧‧‧Diversion section

52a‧‧‧Diversion surface

53‧‧‧Ditch

54‧‧‧Closed

C‧‧‧Connect

D‧‧‧Radial

P‧‧‧lowest end

H1‧‧‧Axial height of the separator

H2‧‧‧Axial height of water blocking diaphragm

L1‧‧‧The height of the water stop

L2‧‧‧Depth of vent

〔Convention〕

9‧‧‧Air exchange device

91‧‧‧Body

911‧‧‧Air inlet

912‧‧‧Outlet

92‧‧‧Partition

93‧‧‧Mask

931‧‧‧ vent

94‧‧‧Fan

D‧‧‧Partition

S1‧‧‧First diversion space

S2‧‧‧Second diversion space

Figure 1: A cross-sectional plan view of a conventional air flow exchange device.

Figure 2: Exploded perspective view of the first embodiment of the present invention.

Fig. 3: A combined sectional side view of the first embodiment of the present invention.

Fig. 4: An exploded perspective view of a second embodiment of the invention.

Fig. 5: A combined sectional side view of a second embodiment of the invention.

Fig. 6: An exploded perspective view of a third embodiment of the invention.

Fig. 7: A sectional side view of a combination of the third embodiment of the present invention.

Figure 8: A cross-sectional view taken along line A-A of Figure 7. .

Fig. 9: A radial cross-sectional view of a separator combined with an end cap according to a fourth embodiment of the present invention.

Fig. 10: A radial cross-sectional view of a separator combined with an end cap according to a fifth embodiment of the present invention.

Fig. 11: An exploded perspective view of a sixth embodiment of the invention.

Figure 12: Partially assembled perspective view as shown in Figure 11.

Fig. 13: A radial cross-sectional view of a protective net and a separator combined with an end cap according to a sixth embodiment of the present invention.

In order to make the above and other objects, features and advantages of the present invention more obvious and understandable, the preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, which are described in detail as follows:

Please refer to FIG. 2, which is the first embodiment of the air duct of the ventilator of the present invention. The air duct of the ventilator includes a tube body 1, an end cover 2 and an outer cover 3, the end cover 2 is combined with the tube Body 1, the outer cover 3 is combined with the end cap 2.

The shape of the tube body 1 is not limited. In this embodiment, the tube body 1 may be, for example, a round tube. However, the tube body 1 may also be a square tube or other various types of pipe columns. In addition, the tube body 1 is based on the premise of selecting a hollow tube with a basic ventilation function. The internal structure composition and appearance shape of the tube body 1 are not limited by the present invention.

The end cover 2 may have a ring member 21 and a plate 22, the ring member 21 is coupled to one end of the tube body 1, the seat plate 22 is connected to the ring member 21; wherein, the seat plate 22 has a through hole 221 and a block In the water portion 222, the through hole 221 communicates with the inside of the tube body 1, the through hole 221 is used for air flow, the water blocking portion 222 is adjacent to the through hole 221, and the through hole 221 is in contact with the water blocking portion The 222 junction has a lowest end P. In particular, if two through holes 221 are provided, the lower through hole 221 is mainly used.

Please also refer to FIG. 3, the outer cover 3 is provided with a vent 31, the vent 31 is adjacent to the water blocking portion 222 of the end cover 2, the outer cover 3 is combined with the end cover 2, so that the vent 3 of the outer cover 3 It can communicate with the through hole 221 of the end cover 2. In detail, the outer cover 3 may have a lower jaw portion 32, the lower jaw portion 32 is adjacent to the vent 31, the lower jaw portion 32 may be used to join the seat plate 22 of the end cap 2, and the vent 31 is in the radial direction D There is a depth L2 between the lower jaw portion 32; wherein the water blocking portion 222 of the end cap 2 preferably extends from the lower jaw portion 32 toward the through hole 221, so that the water blocking portion 222 can have a height L1, so that the water blocking portion 222 and the lower jaw portion 32 can be arranged vertically; thus, the structure is simple and easy to manufacture and assemble, which has the effects of reducing manufacturing costs and improving assembly convenience. It is also explained that the height L1 of the water blocking portion 222 is greater than the depth L2 of the vent 31 to ensure that the water blocking portion 222 can block water or moisture in the external space; preferably, the water blocking portion 222 The height L1 is greater than or equal to 1.5 times the depth L2 of the vent 31. In this way, the water blocking portion 222 can provide an effect of better blocking water or moisture in the external space.

The outer cover 3 may further have an upper jaw portion 35 adjacent to the vent 31 and located on the other side away from the water blocking portion 222. When the vent 31 is facing downward, the upper jaw portion 35 is in the radial direction D The upper limit is preferably lower than the lowest end P. In addition, the outer cover 3 has a connection line C at the periphery connecting the lower jaw portion 32 and the upper jaw portion 35, and when the vent 31 is facing downward, each of the connection lines C in the radial direction D is preferably lower than the minimum The end portion P is used to ensure that the water blocking portion 222 can block water or moisture in the external space.

Referring to FIGS. 2 and 3, according to the foregoing structure, the vent 31 is adjacent to the water blocking portion 222 of the end cover 2, and the water blocking portion 222 of the end cover 2 is directed from the lower jaw portion 32 of the cover 3 toward the through hole The direction of 221 extends; thus, when the air duct of the ventilation device is used, the airflow in the internal space can pass through the through hole 221 and pass through the vent 31 to reach the external space, the airflow in the external space can Enter the tube body 1 through the vent 31 and through the through hole 221 to reach the internal space; and by the water blocking portion 222 to block the water or water vapor in the external space to prevent the water or water vapor from seeping into the tube body 1 Inside, thereby providing a good water blocking effect, and thereby preventing the use function of the air duct of the ventilation device from being affected or being damaged, so as to provide a good circulation ventilation effect.

Please refer to FIGS. 4 and 5, which is the second embodiment of the air duct of the ventilation device of the present invention. The second embodiment of the present invention is substantially the same as the first embodiment described above. The main difference is that The second embodiment further includes a protective net 4, which can be disposed between the vent 31 of the outer cover 3 and the through hole 221 of the end cover 2; wherein, the end cover 2 has at least one clip seat 23, the At least one clip base 23 is disposed on the water blocking portion 222 of the end cover 2, and the protective net 4 is inserted into the at least one clip base 23; so that the protective net 4 can be firmly combined with the end cover 2.

At this time, the through hole 221 is located on one side of the protective net 4 and the vent 31 is located on the other side of the protective net 4; thus, the protective net 4 can block foreign objects (such as birds, mosquitoes, etc.) Foreign matter enters the tube body 1 through the through hole 221, or birds build a nest inside the through hole 221 or the outer cover 3, which can prevent the use function of the air duct of the ventilator from being affected, and has the convenience of improving the use efficacy.

Please refer to Figures 6, 7, and 8, which is the third embodiment of the air duct of the ventilation device of the present invention. The third embodiment of the present invention is substantially the same as the second embodiment described above. The main difference is that: The third embodiment of the invention further includes a partition 5 connected to the seat plate 22 of the end cover 2 and extending away from the tube body 1. Preferably, the partition 5 and the end cap 2 are integrally connected; in this way, they have the effect of increasing structural strength.

In detail, the partition 5 has a partition section 51 and a diversion section 52, the partition section 51 is aligned with the through hole 221, the partition section 51 partitions the through hole 221 into an air inlet 221a and an air outlet 221b, and the air inlet 221a and the air outlet 221b communicate with the vent 31 to improve the smoothness of the flow guide; at this time, the air inlet 221a and the air outlet 221b are located on the same side of the protective net 4, The vent 31 of the outer cover 3 is located on the other side of the protective net 4 to prevent Foreign matter (for example: birds, mosquitoes, etc.) enters the pipe body 1 through the air inlet 221a or the air outlet 221b.

In addition, the diversion section 52 is aligned with the water blocking portion 222, and the diversion section 52 is located between the through hole 221 and the vent 31; to ensure that both incoming and outgoing airflow can pass through the diversion section 52. And the guide section 52 faces the vent 31, the guide section 52 divides the vent 31 into a first vent 31a and a second vent 31b, the first vent 31a communicates with the air inlet 221a, the The second ventilation portion 31b communicates with the air outlet 221b; in this way, the interference between the air inlet and the air outlet can be further avoided, and the smoothness of the diversion can be improved. Wherein, the flow guiding section 52 is curved in an arc shape from the partition section 51 toward the second ventilation portion 31b; to ensure that the airflow can be led out by the second ventilation portion 31b.

In particular, the partition 5 can also be provided with an insertion groove 53, which is opened at the end of the partition 5 furthest away from the end cover 2, and the protective net 4 can be provided with a coupling groove 41, the protective net 4 is inserted into the insertion groove 53 from the coupling groove 41 to preferably vertically combine the partition 5; in this way, the protective net 4 and the partition 5 can be cross-combined with the lifting of the protective net 4 and the partition 5 The effect of combining stability.

In this embodiment, the number of the clip holders 23 is two, the two clip holders 23 are located on the two sides of the partition 5 respectively, and the protective net 4 can be inserted into the two clip holders 23; After being inserted into the insertion groove 53, the two clip seats 23 can also be inserted at the same time, so that the protective net 4 can be more firmly combined with the end cover 2.

In addition, the end cover 2 may further be provided with two lock seats 24, the two lock seats 24 are connected to the seat plate 22, and the two lock seats 24 are respectively located on two sides of the partition 5. The outer cover 3 may be provided with two locking holes 33, and the two locking holes 33 are respectively aligned with the lock seats 24, and the outer cover 3 may penetrate through the two locking holes 33 by two locking fasteners 34 to be fixedly coupled to the two locking seats 24, to improve the stability of the combination of the outer cover 3 and the end cover 2.

Please refer to Figure 9, which is the fourth embodiment of the air duct of the ventilation device of the present invention For example, the fourth embodiment of the present invention is substantially the same as the third embodiment described above, and the main difference is that the diversion section 52 of the fourth embodiment of the present invention forms two diversion surfaces 52a.

In detail, the two flow guiding surfaces 52a are preferably mirror-like, and the two flow guiding surfaces 52a are curved toward the arc shape of the second ventilation portion 31b and the first ventilation portion 31a, respectively. Therefore, when the airflow in the internal space flows out of the air outlet 221b from the tube body 1, the airflow in the internal space is guided by the guide surface 52a and is directed toward the second ventilation portion 31b; When a ventilation portion 31a enters the tube body 1 through the air inlet 221a, the airflow in the external space will be guided along the guide surface 52a and pass through the first ventilation portion 31a, so that the airflow of the first ventilation portion 31a and the first The airflows of the two ventilation parts 31b can be separated further to avoid the interference of the incoming and outgoing airflows, and at the same time to prevent the outgoing airflows from being sucked back into the incoming wind. Thereby, the diversion section 52 provides another aspect, and further improves the smoothness of the overall air flow exchange.

Please refer to FIG. 10, which is the fifth embodiment of the air duct of the ventilation device of the present invention. The fifth embodiment of the present invention is substantially the same as the fourth embodiment described above, and the main difference is that: the fifth embodiment of the present invention For example, the partition 5 has a closed surface 54 in the flow guiding section 52, and the closed surface 54 is connected to the two flow guiding surfaces 52a.

Therefore, when the airflow in the internal space flows out of the air outlet 221b from the tube body 1, the airflow in the internal space is guided by the guide section 52 and is directed toward the second ventilation portion 31b; When a ventilation part 31a enters the tube body 1 through the air inlet 221a, the airflow in the external space will be guided along the guide section 52 to pass through the first ventilation part 31a, except that the airflow of the first ventilation part 31a and The airflow of the second ventilation portion 31b can be separated further away, and by the arrangement of the closing surface 54, it is possible to avoid the interference of the inlet and outlet airflows or the formation of turbulence at the ventilation opening 31. Thereby, the diversion section 52 provides another aspect, and further improves the smoothness of the overall air flow exchange.

Please refer to Figures 11 and 12, which is the sixth embodiment of the air duct of the ventilation device of the present invention. The sixth embodiment of the present invention is substantially the same as the fifth embodiment described above, and its main differences The reason is that the end cover 2 of the sixth embodiment of the present invention has a plurality of water blocking spacers 25.

In detail, the water blocking ribs 25 are connected to the water blocking portion 222, and the water blocking ribs 25 are located between the vent 31 and the air inlet 221a, or the vent 31 and the air outlet 221b In between, the axial height H2 of each water-blocking spacer 25 is smaller than the axial height H1 of the partition 5; thus, the several water-blocking spacers 25 can block water or water vapor and avoid water or water The air penetrates into the inside of the pipe body 1, and at the same time, it does not affect the smoothness of the incoming and outgoing wind. In particular, each of the water blocking spacers 25 is preferably inclined downward to provide a better effect of blocking water or moisture.

Please refer to FIG. 13, in this embodiment, the number of water blocking ribs 25 provided between the vent 31 and the air inlet 221a is four, and the first and second of the four water blocking ribs 25 The two water blocking spacers 25a and 25b are respectively connected to the portion of the clip base 23 between the vent 31 and the protective net 4 from one end, and the other end of the first water blocking spacer 25a is preferably aligned to the four Between the two ends of the third water blocking diaphragm 25c in the water blocking diaphragm 25, the other end of the second water blocking diaphragm 25b is preferably positioned to the fourth water blocking diaphragm 25 Between the two ends of the spacer 25d; the four water-blocking spacers 25 can form two S-shaped channels (as shown by the dotted line in FIG. 13), so that even if the airflow passes in the direction of the arrow, the four water-blocking The spacer 25 has the effect of improving the blocking of liquid water or water vapor, and prevents external water vapor from penetrating into the pipe body 1.

Preferably, one end of the third water blocking diaphragm 25c can be connected to the partition 5, and one end of the fourth water blocking diaphragm 25d can be connected to the ring 21 to ensure that water or water vapor enters the air inlet 221a Before going through the four water blocking spacers 25, it has the effect of improving the blocking of water or moisture.

In summary, the air duct of the ventilating device of the present invention has a water blocking part using the end cover, and the water blocking part is adjacent to the vent of the outer cover; the water blocking part can block the water or the external space Moisture, to ensure that water or moisture does not penetrate into the inside of the pipe body, thereby providing a good water blocking effect, and thereby preventing the use function of the air duct of the ventilation device from being affected or damaged Bad to provide good circulation ventilation effect.

Although the present invention has been disclosed using the above-mentioned preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with this art without departing from the spirit and scope of the present invention still makes various changes and modifications to the above-mentioned embodiments. The technical scope of the invention is protected, so the scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

Claims (21)

An air guide tube of a ventilation device includes: a tube body; an end cover combined with the tube body; the end cover has a through hole and a water blocking part; the through hole communicates with the inside of the tube body; the water blocking part is adjacent to the tube Hole; and a cover, the cover is provided with a vent, the vent is adjacent to the water blocking portion, the cover has an upper jaw, the upper jaw is adjacent to the vent and located on the side away from the water blocking portion; the through hole At the connection with the water blocking part, there is a lowest end. When the vent is facing downward, the upper jaw is lower than the lowest end in the radial direction. The air duct of the ventilation device according to item 1 of the patent application scope, wherein the outer cover has a lower jaw portion, the lower jaw portion is adjacent to the vent and the water blocking portion, and the outer cover connects the lower jaw portion and the upper jaw portion The periphery has a connecting line, and when the vent is facing downward, each of the connecting lines is radially lower than the lowest end. An air guide tube of a ventilation device includes: a tube body; an end cover combined with the tube body; the end cover has a through hole and a water blocking part; the through hole communicates with the inside of the tube body; the water blocking part is adjacent to the tube Hole; and an outer cover, the outer cover is provided with a vent, the vent is adjacent to the water blocking portion, the outer cover has a lower jaw, the lower jaw is adjacent to the vent and used to join the end cap, the water blocking portion is formed by the lower jaw The portion extends toward the through hole. An air guide tube of a ventilation device includes: a tube body; an end cover combined with the tube body; the end cover has a through hole and a water blocking part; the through hole communicates with the inside of the tube body; the water blocking part is adjacent to the tube Hole; an outer cover, the outer cover is provided with a vent, the vent is adjacent to the water blocking portion; and a protective net, the protective net is provided between the vent of the outer cover and the through hole of the end cover, the end cover has At least one clip seat, the at least one clip seat is disposed on the water blocking portion, and the protective net is inserted into the at least one clip seat. The air duct of the ventilation device as described in item 4 of the patent application scope, which further includes a partition, the partition is connected to the end cover and extends in a direction away from the pipe body, the partition has a partition and A diversion section, the partition section divides the through hole area into an air inlet and an air outlet, the diversion section faces the vent. The air duct of the ventilation device as described in item 5 of the patent application, wherein the air inlet and the air outlet are located on the same side of the protective net, and the vent of the outer cover is located on the other side of the protective net. The air duct of the ventilation device as described in item 6 of the patent application, wherein the end cover has a ring and a plate, the ring is combined with one end of the pipe body, and the seat plate is connected to the ring and provides the Dividers combined. The air duct of the ventilation device as described in item 7 of the patent application scope, wherein the end cover is provided with two lock seats, the two lock seats are connected to the seat plate, and the two lock seats are respectively located on two sides of the partition, The outer cover is provided with two locking holes, and two locking fasteners penetrate through the two locking holes to be fixedly coupled to the two locking seats. The air duct of the ventilation device as described in item 5 of the patent application, wherein the partition is provided with an insertion groove, the insertion groove is opened at the end of the partition away from the end cover, and the protective net is provided with a coupling groove , The protective net is inserted into the insertion groove from the coupling groove to couple the partition. The air duct of the ventilation device as described in item 4 of the patent application scope, wherein the number of the clip holders is two, the two clip holders are respectively located on two sides of the partition, and the protective net is inserted into the two clip holders. The air duct of the ventilation device as described in item 5 of the patent application scope, wherein the air guide segment divides the air vent into a first vent part and a second vent part, the first vent part communicates with the air inlet, The second ventilation part communicates with the air outlet. The air duct of the ventilation device as described in item 11 of the patent application range, wherein the diversion section is aligned with the water blocking portion, and the diversion section is arc-shaped from the partition section toward the direction of the second ventilation section bending. The air guide pipe of the ventilation device as described in item 11 of the patent application scope, wherein the air guide section forms two air guide surfaces, and the two air guide surfaces respectively arc toward the second air vent and the first air vent The shape is curved. The air duct of the ventilation device as described in item 13 of the patent application scope, wherein the partition has a closed surface at the diversion section, and the closed surface is connected to the two diversion surfaces. The air guide tube of the ventilation device as described in item 5 of the patent application scope, wherein the air guide section is located between the through hole and the air vent. The air duct of the ventilation device as described in item 4 of the patent application scope, wherein the end cover has a plurality of water blocking septa, the plurality of water blocking septa are connected to the water blocking part, and the plurality of water blocking septa Located between the vent and the air inlet or between the vent and the air outlet, the axial height of each of the water blocking fins is smaller than the axial height of the partition. The air duct of the ventilation device as described in item 16 of the patent application scope, wherein each of the several water blocking ribs is inclined downward. The air duct of the ventilation device as described in item 16 of the patent application scope, wherein the number of water blocking ribs provided between the vent and the air inlet is four, and the number of the four water blocking ribs 1. The second water blocking diaphragm is connected to the position of the clip seat between the vent and the protective net from one end, and the other end of the first water blocking diaphragm is aligned to the four water blocking diaphragms Between the two ends of the third water blocking diaphragm, the other end of the second water blocking diaphragm is aligned to between the two ends of the fourth water blocking diaphragm among the four water blocking diaphragms. The air duct of the ventilation device as described in item 18 of the patent application, wherein the end cover has a ring and a plate, the ring is combined with one end of the pipe body, and the seat plate is connected to the ring and supplies the The separators are combined, one end of the third water blocking diaphragm is connected to the separator, and one end of the fourth water blocking diaphragm is connected to the ring. The air duct of the ventilation device as described in item 5 of the patent application scope, wherein the partition and the end cover are integrally connected. The air duct of the ventilation device as described in item 3 of the patent application, wherein the height of the water blocking part is greater than the depth of the vent.