CN209261874U - Cooling fan - Google Patents

Abstract

The utility model embodiment provides a kind of cooling fan, including shell, the first wet curtain, the first watering part, the first water receiving part, the second wet curtain and the second watering part；The upper part of the housing is formed with air outlet, lower part is formed with air inlet；First wet curtain is set to the air inlet；The first watering part is set to the top of first wet curtain；The first water receiving part is set to the lower section of first wet curtain；Second wet curtain is set to the air inlet；The second watering part is set to the top of second wet curtain, and the second watering part is connected to the first water receiving part so that the water energy in the first water receiving part is enough trickled to the second watering part.The cooling fan of the utility model embodiment forms dual evaporation cooling, can effectively promote the evaporative cooling efficiency of cooling fan；The size in length and breadth of cooling fan is not increased additionally, cooling fan is compact-sized；A water pump is only needed, the manufacturing cost of cooling fan is reduced.

Description

Cooling fan

Technical field

The utility model relates to household appliance technical field, in particular to a kind of cooling fan.

Background technique

Existing cooling fan, as shown in Figure 1, existing Domestic fan for cooling mostly uses greatly the transverse direction of back air inlet, front outlet air Air channel structure (flow direction that the solid arrow in Fig. 1 is wind), i.e. air inlet 1 ', wet curtain 2 ', blower 3 ', air outlet 4 ' are substantially It positioned at sustained height, is limited by the size in length and breadth of cooling fan, the length and width apparent size of cooling fan product needs to design in reasonable model Enclose, it is wide or it is too long product occupied area can be made larger, reduce the experience sense of user, therefore, it is general only in air inlet or Wet curtain is set at air outlet, and the thinner thickness (if wet curtain is thicker, will increase the apparent size of cooling fan) of wet curtain 2 ', is had It is smaller to imitate heat exchange area, thus causes the evaporation efficiency of cooling fan low, cooling effect is unobvious.

Utility model content

In view of this, the utility model embodiment is intended to provide, a kind of topology layout is compact, heat exchange area is biggish cold Fan.

In order to achieve the above objectives, the utility model embodiment provides a kind of cooling fan, including shell, the first wet curtain, One watering part, the first water receiving part, the second wet curtain and the second watering part；The upper part of the housing is formed with air outlet, the shell Lower part is formed with air inlet；First wet curtain is set to the air inlet；The first watering part is set to described first The top of wet curtain, it is described first watering part on be formed with multiple first leakage holes；The first water receiving part is set to described first The lower section of wet curtain；Second wet curtain is set to the air inlet, and the installation site of second wet curtain is lower than described first The installation site of wet curtain；The second watering part is set to the top of second wet curtain, is formed on the second watering part Multiple second leakage holes, the second watering part are connected to the water energy so that in the first water receiving part with the first water receiving part In enough tricklings to the second watering part.

Further, spaced apart water inlet and overflow port are formed on the first watering part, the overflow port with The first water receiving part connection.

Further, the cooling fan includes the water suction being located between the first watering part and first wet curtain Part, the absorbent member cover the top of first wet curtain；The absorbent member is correspondingly arranged with first leakage hole, and described The aperture of one leakage hole is arranged such that the absorbent member for water suction wetting.

Further, the first watering part includes box-structure, extends downwardly from the bottom margin of the box-structure Flange and be set to the interconnecting pieces of the flange both lateral sides, first leakage hole is formed in the box-structure Bottom, the water inlet and overflow port are formed in the side wall of the box-structure, and the top insertion of first wet curtain is described convex In edge；The both lateral sides of the first water receiving part are formed with support construction, and first wet curtain is set in the support construction, The top of the support construction is abutted with the flange, and the interconnecting piece is detachably connected with the support construction.

Further, the bottom of the first water receiving part is formed with water storage tank, and the lower part of first wet curtain is located at described In water storage tank, the water storage tank construction are as follows: the water energy in the water storage tank is enough flooded to the predetermined altitude of first wet curtain.

Further, the second watering part includes bottom plate, and second leakage hole is formed on the bottom plate, the bottom Ventilation hole and exhaust outlet are formed on plate；The ventilation hole is located at the outside of the exhaust outlet, and the ventilation hole corresponds to described The top of second wet curtain；The inside and outside two sides of the ventilation hole are arranged with multiple second leakage holes.

Further, second wet curtain is formed as cyclic structure, and each side of the lower part of the housing is respectively formed State air inlet.

Further, the second watering part includes diversion column, and the diversion column is interspersed in second leakage hole.

Further, the second watering part includes the water proof portion positioned at the lower surface of base plate, and the water proof portion is from institute It states lower surface of base plate to extend downwardly, the water proof portion is annular in shape, and the water proof portion encloses around second leakage hole, institute It states and is contacted at the top of the bottom and second wet curtain in water proof portion.

Further, the cooling fan includes the second water receiving part below second wet curtain and is located at described the Water tank below two water receiving parts, second wet curtain are supported on the second water receiving part, are formed on the second water receiving part Drainage hole, the drainage hole are connected to the water tank.

Further, the cooling fan includes centrifugal blower and water tank, the inside of the shell along short transverse, from down toward On be sequentially arranged the water tank, second wet curtain, the centrifugal blower and first wet curtain.

The cooling fan of the utility model embodiment is provided with wet curtain at air inlet and air outlet, forms dual evaporation Cooling, can effectively promote the evaporative cooling efficiency of cooling fan；Meanwhile air inlet being set to the lower section of air outlet, i.e., it will be into Air port and air outlet are staggeredly arranged, and on the one hand can not additionally increase the size in length and breadth of cooling fan, so that cooling fan is compact-sized； On the other hand, the position of air inlet and air outlet determines the installation site of the first wet curtain and the second wet curtain, the peace of the second wet curtain Dress height is lower than the first wet curtain, and the water for passing through the first wet curtain can trickle naturally at the second wet curtain, additional without increasing Power source, need to only use a water pump that water be pumped to the top of the first wet curtain, can so save a water pump, reduce The manufacturing cost of cooling fan.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the cooling fan of the prior art；

Fig. 2 is the front view of the cooling fan of the utility model embodiment；

Fig. 3 is the cross-sectional view in the direction B-B along Fig. 2；

Fig. 4 is that first fit structure for sprinkling water part, the first wet curtain and the first water receiving part of the utility model embodiment shows It is intended to；

Fig. 5 is the cross-sectional view of the short transverse along Fig. 4, wherein section is between water inlet and overflow port；

Fig. 6 is the structural schematic diagram of the first watering part of the utility model embodiment；

Fig. 7 is the plane of symmetry cross-sectional view of the first watering part shown in Fig. 6；

Fig. 8 is the fit structure schematic diagram of second the watering part and the second wet curtain of the utility model embodiment；

Fig. 9 is the schematic cross-sectional view of the second watering part and the second wet curtain and the second water receiving part shown in Fig. 8, wherein section Substantially along the plane of symmetry of fit structure shown in Fig. 8；

Figure 10 is the structural schematic diagram of the second watering part of the utility model embodiment；

Figure 11 is the partial enlargement diagram in Figure 10 at E；

Figure 12 is the bottom view of the second watering part shown in Figure 10；

Figure 13 is the cross-sectional view in the direction D-D along Figure 12；

Figure 14 is the partial enlargement diagram in Figure 13 at F；

Description of symbols

Shell 10；Air inlet 10a；Air outlet 10b；First watering part 21；First leakage hole 21a；Water inlet 21b；Overflow Mouth 21c；Box-structure 211；Interconnecting piece 212；Connecting tube 213；Flange 214；Absorbent member 22；First wet curtain 23；First water receiving part 24；Water storage tank 24a；Drainage joint 241；Support construction 242；Second watering part 31；Second leakage hole 31a；Exhaust outlet 31b；It is logical Air holes 31c；Water storage cavity 31d；Bottom plate 311；Lateral coaming plate 312；Diversion column 313；Water proof portion 314；Grid 315；Second wet curtain 32； Second water receiving part 33；Drainage hole 33a；Water tank 40；Centrifugal blower 50

Specific embodiment

The side when noun of locality used in the utility model embodiment " upper and lower, top, bottom " is for cooling fan normal use For position；" inside and outside " is for this body structure of cooling fan.

The utility model embodiment provides a kind of cooling fan, please refers to Fig. 2 and Fig. 3, and cooling fan includes shell 10, One wet curtain 23, first watering part 21, the first water receiving part 24, the second wet curtain 32, second watering part 31, water tank 40, (figure is not for water pump Show) and centrifugal blower 50,10 top of shell is formed with air outlet 10b, and (direction shown in the solid arrow C in Fig. 2 is Wind direction), 10 lower part of shell is formed with air inlet 10a (direction shown in the solid arrow A in Fig. 2 is air inlet direction)；Institute The first wet curtain 23 is stated to be set at the air outlet 10b；The first watering part 21 is set to the top of first wet curtain 23, Multiple first leakage hole 21a are formed on the first watering part 21；The first water receiving part 24 is set to first wet curtain 23 lower section；Second wet curtain 32 is set at the air inlet 10a, and the installation site of second wet curtain 32 is lower than described The installation site of first wet curtain 23；The second watering part 31 is set to the top of second wet curtain 32, second watering Multiple second leakage hole 31a are formed on part 31, the second watering part 31 is connected to the first water receiving part 24 so that institute The water energy in the first water receiving part 24 is stated enough to trickle to the second watering part 31.Water pump is for the water in water tank 40 to be pumped to In first watering part 21, centrifugal blower 50 is used to the air after the cooling of the second wet curtain 32 blowing to the first wet curtain 23 in turn It is sent out from the air outlet 10b of cooling fan.

The cooling fan of the utility model embodiment is provided with wet curtain at air inlet 10a and air outlet 10b, forms two Grade evaporative cooling, can effectively promote the evaporative cooling efficiency of cooling fan；Meanwhile air inlet 10a is set to air outlet 10b Lower section, i.e., air inlet 10a and air outlet 10b are staggeredly arranged, on the one hand can not additionally increase the size in length and breadth of cooling fan, Wherein, size refers to the size of the short transverse perpendicular to cooling fan in length and breadth, and cooling fan is compact-sized；On the other hand, it enters the wind The position of mouth 10a and air outlet 10b determines the installation site of the first wet curtain 23 and the second wet curtain 32, the installation of the second wet curtain 32 Height is lower than the first wet curtain 23, and the water for passing through the first wet curtain 23 can be trickled naturally at the second wet curtain 32, without increasing Additional power source need to only use a water pump that water is pumped to the top of the first wet curtain 23, can so save a water Pump, reduces the manufacturing cost of cooling fan.Furthermore the water of the second wet curtain 32 has had been subjected to the evaporation drop of the first wet curtain 23 Temperature, therefore, the water of the second wet curtain 32 is colder, and moistening and lowering temperature effect is more preferable.

Referring to Fig. 5, the first wet curtain 23 is substantially plate-like in the present embodiment, air-flow is after the first wet curtain 23 from air outlet 10b blows to user.

Please refer to Fig. 6 and Fig. 7, the first watering part 21 includes closed box-structure 211, from the bottom of box-structure 211 Flange 214 that edge extends downwardly and the interconnecting piece 212 for being connected to 214 both lateral sides of flange.The top of first wet curtain 23 It is embedded in flange 214, flange 214 plays better firm effect to the first wet curtain 23, reinforces the first wet curtain 23 and the first watering Connection between part 21.Interconnecting piece 212 with the first water receiving part 24 for being fixedly connected, that is to say, that the first watering part 21 and the The mating connection of one water receiving part 24 is the first wet curtain 23 to be firmly installed therebetween, so that three forms an entirety, Convenient for being also convenient for user for replacement operation in integral installation to shell 10.Water storage, the first leakage hole are used in box-structure 211 21a is formed in the bottom of the box-structure 211.Be formed on the side wall of the box-structure 211 spaced apart water inlet 21b and Overflow port 21c, overflow port 21c are connected to the first water receiving part 24, such as are connected to by connecting tube 213；Water enters through water inlet 21b In box-structure 211, when the liquid level of the water in box-structure 211 is more than certain altitude, extra water is discharged through overflow port 21c To the first water receiving part 24, it thus both can guarantee that water was in recurrent state always, and also can control the water consumption of the first wet curtain 23.

Referring to Fig. 5, cooling fan further includes being located between the first watering part 21 and the first wet curtain 23 in the present embodiment Absorbent member 22, the absorbent member 22 cover the first wet curtain 23 top.The aperture of first leakage hole 21a is smaller, for example, being 1mm- Between 1.5mm, so that absorbent member 22 is water suction wetting, that is to say, that so that the water in the first watering part 21 is passively inhaled Water part 22 absorbs, and without initiatively flowing through the first leakage hole 21a, i.e. interfacial tension of the water at the first leakage hole 21a makes Water is difficult to travel naturally through the first leakage hole 21a under self gravitation effect；Absorbent member 22 can inhale from the first leakage hole 21a It receives the water in the first watering part 21, after absorbent member 22 absorbs water, the first wet curtain 23 and then the water in absorbent member 22 can be absorbed, so that First wet curtain 23 will not converge into a large amount of droplets while keeping wet, it is possible thereby to avoid " flying water phenomenon ", improve user's Experience sense.In the prior art, it mostly uses water drenching mode to supply water to wet curtain greatly, since the wind speed at air outlet 10b is larger, works as wet curtain When being set at air outlet 10b, the biggish air-flow of wind speed can carry a large amount of droplet and blow to user, bring hair under one kind to user The feeling of capillary rain seriously affects the experience sense of user.

Please continue to refer to Fig. 5, the bottom of the first water receiving part 24 is formed with water storage tank 24a, and the lower part of the first wet curtain 23 is located at In water storage tank 24a, water storage tank 24a construction are as follows: the water energy in water storage tank 24a is enough flooded to the predetermined altitude L of the first wet curtain 23, than Such as, L is at 30mm, wherein predetermined altitude L refers to the preset distance from the bottom of the first wet curtain 23 up, that is to say, that the The lower part of one wet curtain 23 always some can impregnate in water, the first wet curtain 23 itself has water imbibition, and such first is wet Curtain 23 can constantly absorb the water in water storage tank 24a with the water suction property of itself, so that the first wet curtain 23 remains wet shape State is without agglomerating excessive droplet.In the present embodiment, the first wet curtain 23 use water suction mode, i.e., by absorbent member 22 absorb water with And the water in 23 active absorption water storage tank 24a of the first wet curtain, it can either guarantee wet needed for the evaporative cooling of the first wet curtain 23 Degree, and " flying water phenomenon " at air outlet 10b can be effectively prevented from.

Specifically, Fig. 4 and Fig. 5 are please referred to, in the present embodiment, the generally planar structure in bottom of the first water receiving part 24, The bottom of one wet curtain 23 is supported in the bottom of the first water receiving part 24, convenient for the firm installation of the first wet curtain 23.First water receiving part 24 On be also formed with discharge outlet, drainage joint 241 can be set at discharge outlet, convenient for draining drainage.First water receiving part 24 and second Part 31 of sprinkling water is connected to, such as can be connect by water pipe with the drainage joint 241 to draw water extra in the first water receiving part 24 It flow in the second watering part 31, is also possible to form the structures such as drainage trough inside shell 10, herein with no restrictions.Further, The both lateral sides of first water receiving part 24 are formed with support construction 242, and the first wet curtain 23 is set in support construction 242, flange 214 It is abutted with the top of support construction 242, meanwhile, interconnecting piece 212 is detachably connected with support construction, such as passes through screw, spiral shell It tethers and connects.The both lateral sides that support construction 242 is set to the first water receiving part 24 will not influence the front face area of the first wet curtain 23.

Cooling fan in the utility model embodiment can be one side and enter the wind, and be also possible to two sides, three faces or four sides It enters the wind, is arranged with wet curtain at each air inlet 10a.For example, the second wet curtain 32 can be plate when only one side is entered the wind Shape, when two sides air inlet, the second wet curtain 32 is L-shaped, and when three faces air inlet, the second wet curtain 32 is in U-typed, when four sides is entered the wind When, the second wet curtain 32 is in a ring.Second wet curtain 32 is in the structure being integrally connected together, so can be whole in order to the second wet curtain 32 Body replacement.

The structure type of second watering part 31 is corresponding with the structure type of the second wet curtain 32.In the present embodiment, please refer to Fig. 8, each side of 10 lower part of shell are formed with air inlet 10a, i.e. cooling fan four sides is entered the wind, and the second wet curtain 32 is formed as cyclic annular Structure, the second watering part 31 are plate-like.Specifically, the second wet curtain 32, which can be, is stitched together by muti-piece wet curtain and is formed, more A hollow region is formed between a wet curtain.

Referring to Fig. 10, being formed with exhaust outlet 31b and multiple ventilation hole 31c on the second watering part 31, exhaust outlet 31b is located at The centre of second watering part 31 is simultaneously corresponding with the hollow region of the second wet curtain 32, during air-flow enters after the second wet curtain 32 from outside Empty region, then enter centrifugal blower 50 from exhaust outlet 31b.Multiple ventilation hole 31c are located at the outside of exhaust outlet 31b, ventilation hole 31c Corresponding to the top of the second wet curtain 32, ventilation hole 31c can be along the contour extension of the second wet curtain 32.When air-flow is wet by second When curtain 32, fraction can rise along the internal voids of the second wet curtain 32 and be discharged from ventilation hole 31c, that is to say, that ventilation Hole 31c increases the air-flow through-current capacity of the second wet curtain 32.

Further, referring to Fig. 10, the second watering part 31 further includes the grid 315 being formed at exhaust outlet 31b, grid The structural strength of the second watering part 31 can be enhanced in 315 one side, while being also avoided that sundries enters in the second wet curtain 32.

Specifically, Figure 10-Figure 14 is please referred to, the second watering part 31 includes bottom plate 311, multiple lateral coaming plates 312, diversion Column 313 and water proof portion 314, bottom plate 311 and lateral coaming plate 312 are enclosed jointly is set as water storage cavity 31d, and the second leakage hole 31a is formed in On bottom plate 311.The second leakage hole 31a can be up big and down small bellmouth, in favor of water conservancy diversion.Diversion column 313 is interspersed in It is connect in second leakage hole 31a and with the side wall of the second leakage hole 31a, diversion column 313 plays preferable drainage, improves Water is not easy the phenomenon leaked out in the second wet curtain 32 in the second leakage hole 31a due to surface tension.314 shape of water proof portion At in the lower surface of bottom plate 311, water proof portion 314 is annular in shape, and water proof portion 314 encloses around the second leakage hole 31a, i.e., often One second leakage hole 31a is correspondingly arranged on a diversion column 313 and a water proof portion 314.The lower part in water proof portion 314 and second The top of wet curtain 32 contacts, and water proof portion 314 can to enter from the water that the second leakage hole 31a is leaked out from water proof portion 314 In second wet curtain 32, prevent water flow from causing cooling fan whole to the edge of shell 10 along the lower surface lateral flow of bottom plate 311 The case where machine leak.

Second wet curtain 32 uses water drenching mode, and the aperture of the second leakage hole 31a is slightly larger, for example, 2-5mm, so that second is wet Curtain 32 soaks for water drenching, and so certifiable second wet curtain 32 has enough moisture.

Referring to Fig. 9, the second water receiving part 33 is located at the lower section of the second wet curtain 32, drainage hole is formed on the second water receiving part 33 33a.Water tank 40 is located at the lower section of the second water receiving part 33, and drainage hole 33a is connected to water tank 40, and the water in the second water receiving part 33 is through arranging Water hole 33a is back in water tank 40.Water in water tank 40 is through in water pump pumps to the first watering part 21.Water pump can be set in water In case 40.

It is understood that for the ease of the second wet curtain of user's self-changeable 32, the second wet curtain 32 and the first watering part 21 And second watering part 31 between be not fixedly connected, it is only necessary to meet relative positioning.

The cooling fan of the utility model embodiment is roughly divided into four separations along short transverse, and the bottom installs water Case 40, layer second from the bottom install the second wet curtain 32, the second water receiving part 33 and the second watering part 31, layer installation centrifugation third from the bottom Blower 50, top layer install the first wet curtain 23, the first water receiving part 24 and the first watering part 21.Such topology layout, on the one hand, can So that the second wet curtain 32 there can be larger size along air inlet direction, increases heat exchange area but not increase the transverse direction of cooling fan Size；On the other hand, cooling fan height in the prior art is insufficient, cold when cooling fan is placed in bedroom, and user lies on a bed The cool breeze of fan blowout can not blow to the position of user, and the experience sense of user is poor；Cooling fan in the present embodiment, not additional In the case where the size in length and breadth for increasing cooling fan, the height of cooling fan is increased, so that cooling fan has suitable height, It is able to maintain compact-sized.

It should be noted that the material of the first wet curtain 23 and the second wet curtain 32 in the utility model embodiment is unlimited.

The above, the only preferred embodiment of the utility model, are not intended to limit the protection of the utility model Range.

Claims (11)

1. cooling fan characterized by comprising

Shell (10), shell (10) top are formed with air outlet (10b), and shell (10) lower part is formed with air inlet (10a)；

First wet curtain (23), first wet curtain (23) are set at the air inlet (10a)；

First watering part (21), first watering part (21) are set to the top of first wet curtain (23), and described first spills Multiple first leakage holes (21a) are formed on water part (21)；

First water receiving part (24), the first water receiving part (24) are set to the lower section of first wet curtain (23)；

Second wet curtain (32), second wet curtain (32) are set at the air inlet (10a), the peace of second wet curtain (32) Holding position is lower than the installation site of first wet curtain (23)；

Second watering part (31), second watering part (31) are set to the top of second wet curtain (32), and described second spills Multiple second leakage holes (31a) are formed on water part (31), second watering part (31) and the first water receiving part (24) are even It passes to so that the water energy in the first water receiving part (24) is enough trickled to second watering part (31).

2. cooling fan according to claim 1, which is characterized in that be formed with arranged for interval in first watering part (21) Water inlet (21b) and overflow port (21c), the overflow port (21c) is connected to the first water receiving part (24).

3. cooling fan according to claim 2, which is characterized in that the cooling fan includes being located in the first watering part (21) absorbent member (22) between first wet curtain (23), the absorbent member (22) cover the top of first wet curtain (23) Portion；The absorbent member (22) is correspondingly arranged with first leakage hole (21a), the aperture configuration of first leakage hole (21a) Are as follows: so that the absorbent member (22) is water suction wetting.

4. cooling fan according to claim 3, which is characterized in that first watering part (21) includes box-structure (211), the flange (214) that extends downwardly from the bottom margin of the box-structure (211) and it is set to the flange (214) interconnecting piece (212) of both lateral sides, first leakage hole (21a) are formed in the bottom of the box-structure (211), The water inlet (21b) and overflow port (21c) are formed in the side wall of the box-structure (211), first wet curtain (23) Top is embedded in the flange (214)；The both lateral sides of the first water receiving part (24) are formed with support construction (242), described First wet curtain (23) is set in the support construction (242), the top and the flange (214) of the support construction (242) It abuts, the interconnecting piece (212) is detachably connected with the support construction (242).

5. cooling fan according to claim 3, which is characterized in that the bottom of the first water receiving part (24) is formed with water storage Slot (24a), the lower part of first wet curtain (23) are located in the water storage tank (24a), water storage tank (24a) construction are as follows: institute The water energy in water storage tank (24a) is stated enough to flood to the predetermined altitude of first wet curtain (23).

6. cooling fan according to claim 1, which is characterized in that second watering part (31) includes bottom plate (311), institute It states the second leakage hole (31a) to be formed on the bottom plate (311), is formed with ventilation hole (31c) and air draft on the bottom plate (311) Mouth (31b)；The ventilation hole (31c) is located at the outside of the exhaust outlet (31b), and the ventilation hole (31c) corresponds to described the The top of two wet curtains (32)；The inside and outside two sides of the ventilation hole (31c) are arranged with multiple second leakage holes (31a).

7. cooling fan according to claim 6, which is characterized in that second wet curtain (32) is formed as cyclic structure, institute The each side for stating shell (10) lower part is each formed with the air inlet (10a).

8. cooling fan according to claim 6, which is characterized in that second watering part (31) includes diversion column (313), The diversion column (313) is interspersed in second leakage hole (31a).

9. cooling fan according to claim 6, which is characterized in that second watering part (31) includes being located at the bottom plate (311) the water proof portion (314) of lower surface, the water proof portion (314) extend downwardly from the bottom plate (311) lower surface, it is described every Annularly, the water proof portion (314) is enclosed around second leakage hole (31a), the water proof portion in water portion (314) (314) bottom is contacted with the top of second wet curtain (32).

10. cooling fan according to claim 6, which is characterized in that the cooling fan includes being located at second wet curtain (32) the second water receiving part (33) below and the water tank (40) below the second water receiving part (33), second wet curtain (32) it is supported on the second water receiving part (33), is formed with drainage hole (33a), the draining on the second water receiving part (33) Hole (33a) is connected to the water tank (40).

11. cooling fan according to claim 1, which is characterized in that the cooling fan includes centrifugal blower (50) and water tank (40), the inside of the shell (10) is sequentially arranged the water tank (40), second wet curtain along short transverse from bottom to up (32), the centrifugal blower (50) and first wet curtain (23).