CN204061112U - Fan and the nozzle for fan thereof - Google Patents

Abstract

A kind of fan, it comprises pedestal and nozzle, this nozzle comprises base portion and main body, this main body can relative to base portion never oblique position slide into oblique position, this base portion comprises the pneumatic tube with air inlet section and gassed-out zone, this air inlet section comprises suction port, this gassed-out zone comprises air outlet, first surface and the second curved surface, the cross sectional area of the pore of gassed-out zone increases from the beginning of gassed-out zone gradually to air outlet, this main body comprises frame, inner passage, relief opening and the opening for allowing pneumatic tube stretch into, frame comprises the 3rd curved surface and the 4th curved surface and defines through hole, wherein, pneumatic tube and frame are slidably connected, air outlet is positioned at opening, one in pneumatic tube and frame comprises slidable bar, another in pneumatic tube and frame comprises sliding-groove, when relative to base portion, never oblique position slides into oblique position to main body, opening towards changing.The utility model additionally provides the nozzle for this kind of fan.

Description

Fan and the nozzle for fan thereof

Technical field

The utility model relates to a kind of fan and the nozzle for this kind of fan thereof.

Background technique

Traditional fan generally includes one group of blade rotating around the shaft and for driving this group blade rotary to produce the motor of air-flow.This group blade is usually located in cage, and this cage allows air-flow to pass, and stops human contact to arrive the blade of this group rotation.

This kind of fan can be various sizes and shape.Such as, ceiling fan can have the diameter of at least l000mm, and usually mounted on the ceiling to provide downward air-flow in a hanging manner.Again such as, desk fan has the diameter of 300mm usually, and usually freely erects and be easy to mobile.The fan of other type can be positioned on floor or be arranged on wall.

The shortcoming of this kind of fan be air-flow that rotation blade produces normally uneven or " springing up ".This is uncomfortable for the user.Although another shortcoming is rotation blade be positioned at cage, in some cases, human body touches the danger of rotation blade in addition.

On November 6th, 2013, Authorization Notice No. was the Chinese patent (application number: 201320275243.7) disclose a kind of fan of CN203272078U.The nozzle that this kind of fan comprises pedestal and be connected with described pedestal, described nozzle comprises import department and main body, described main body can relative to described import department never oblique position slide into oblique position, the first component that described import department comprises suction tude and is connected with described suction tude, described main body comprise frame, for accept air-flow inner passage, for launching the relief opening of air-flow and the opening for allowing described suction tude stretch into, wherein, described first component has at least part to be positioned at described frame.

This kind of fan can change air-out orientation to meet the different demands of user in vertical plane.But, when the air-flow of this fan enters the inner passage of main body from suction tude, easily cause turbulent flow, increase flow loss and the noise of air-flow; Described first component is as the critical piece of the leaning device of this kind of fan in addition, is easily out of shape, and brings difficulty to the tilt operation of fan.

Summary of the invention

First aspect of the present utility model to provide-kind of fan.This kind of fan, it is characterized in that, the nozzle that described fan comprises pedestal and is connected with described pedestal, described nozzle comprises base portion and main body, described main body can relative to described base portion never oblique position slide into oblique position, described base portion comprises pneumatic tube, described pneumatic tube comprises air inlet section and is positioned at the gassed-out zone in described air inlet section downstream, described air inlet section comprises suction port, described gassed-out zone comprises air outlet, first surface and the second curved surface, the cross sectional area of the pore of described gassed-out zone increases from the beginning of gassed-out zone gradually to described air outlet, described main body comprises frame, inner passage, relief opening and the opening for allowing described pneumatic tube stretch into, described frame comprises the 3rd curved surface coordinated with first surface and the 4th curved surface coordinated with the second curved surface and defines through hole, wherein, described pneumatic tube and described frame are slidably connected, described air outlet is positioned at described opening, one in described pneumatic tube and described frame comprises slidable bar, another in described pneumatic tube and described frame comprises the sliding-groove coordinated with described slidable bar, when relative to described base portion, never oblique position slides into oblique position to described main body, described opening towards changing.

Because the cross sectional area of the pore of the gassed-out zone of the pneumatic tube of this kind of fan increases from the beginning of gassed-out zone gradually to described air outlet, the turbulent flow being conducive to making to enter from pneumatic tube the inner passage of main body reduces, thus is conducive to the flow loss reducing air-flow and the noise produced; In addition, the pneumatic tube of this kind of structure be slidably connected with frame is the critical piece of the leaning device of fan, and its stabilized structure is not yielding, is conducive to being well on and reliable tilt operation, is conducive to preventing flow leakage when sliding; Further, the fan of this kind of structure, is conducive to improving its overall appearance degree.

Tilt angle when main body is in maximum inclining position relative to base portion is preferably located between 6 ° to 30 °, more preferably between 8 ° to 15 °.

The shape of the cross section of the pore of described gassed-out zone is preferably rectangle; The shape of the cross section of the pore of described air inlet section is also preferably rectangle.Described rectangle comprises round rectangle.

The length of described gassed-out zone is usually located between 6mm to 60mm, is preferably located between 8mm to 60mm, more preferably between 10mm to 30mm.

The length of described air inlet section is usually located between 15mm to 60mm, is preferably located between 20mm to 50mm, more preferably between 20mm to 40mm.

The pore of described gassed-out zone is not less than 125% of the cross sectional area of pore in described beginning of described gassed-out zone usually at the cross sectional area at described air outlet place; Preferably, the cross sectional area of the pore of described gassed-out zone at described air outlet place at the pore of described gassed-out zone between 130% to 200% of the cross sectional area of described beginning.

For the ease of manufacturing and assembling, the rear housing portion that described frame preferably includes front housing part and is connected with front housing part; The rear portion bulb portion that described pneumatic tube preferably includes anterior bulb portion and is connected with anterior bulb portion.In fact, integrally formed pneumatic tube is difficult to go deep in the opening of frame, cannot realize smooth assembling.

Described base portion preferably includes two pieces of bending slide plates, and these two pieces of slide plates are connected with the tube wall of pneumatic tube at air outlet place.

In a preferred embodiment, described gassed-out zone also comprises the first plane and the second plane.In another preferred embodiment, described gassed-out zone comprises the first cylndrical surface and the second cylndrical surface, and described frame comprises the three cylindrical face coordinated with the first cylndrical surface and the 4th cylndrical surface coordinated with the second cylndrical surface.

Nozzle preferably extends around through hole, is entrainmented by described through hole by the air-flow launched from described relief opening from the air outside nozzle.Nozzle preferably includes ring nozzle, the height of its nozzle preferably between 200mm to 600mm, more preferably between 250mm to 500mm.

Relief opening preferably includes slot-shaped relief opening, and its relief opening is usually located between 0.5mm to 8mm at the width in outlet port, is preferably located between 1mm to 3.5mm.

Pedestal preferably includes the structure for generation of the air-flow by nozzle.Structure for generation of the air-flow by nozzle comprises impeller chimney, is positioned at the motor of the impeller of impeller chimney and drives impeller rotary work.Impeller can be centrifugal impeller, can be also mixed flow impeller, be preferably mixed flow impeller; The rotating speed of impeller is usually located between 800rpm to 7500rpm, is preferably located between 1200rpm to 7000rpm.Motor can be DC Brushless Motor, also can be alternating current motor.

Second aspect of the present utility model be to provide-kind for the nozzle of fan.This kind of nozzle, it is characterized in that, described nozzle comprises base portion and main body, described main body can relative to described base portion never oblique position slide into oblique position, described base portion comprises pneumatic tube, described pneumatic tube comprises air inlet section and is positioned at the gassed-out zone in described air inlet section downstream, described air inlet section comprises suction port, described gassed-out zone comprises air outlet, first surface and the second curved surface, the cross sectional area of the pore of described gassed-out zone increases from the beginning of gassed-out zone gradually to described air outlet, described main body comprises frame, inner passage, relief opening and the opening for allowing described pneumatic tube stretch into, described frame comprises the 3rd curved surface coordinated with first surface and the 4th curved surface coordinated with the second curved surface and defines through hole, wherein, described pneumatic tube and described frame are slidably connected, described air outlet is positioned at described opening, one in described pneumatic tube and described frame comprises slidable bar, another in described pneumatic tube and described frame comprises the sliding-groove coordinated with described slidable bar, when relative to described base portion, never oblique position slides into oblique position to described main body, described opening towards changing.

The shape of the cross section of the pore of described gassed-out zone is preferably rectangle.The shape of the cross section of the pore of described air inlet section is also preferably rectangle.Described rectangle comprises round rectangle.

The length of described gassed-out zone is usually located between 6mm to 60mm, is preferably located between 8mm to 60mm, more preferably between 10mm to 30mm.

The length of described air inlet section is usually located between 15mm to 60mm, is preferably located between 20mm to 50mm, more preferably between 20mm to 40mm.

The pore of described gassed-out zone is not less than 125% of the cross sectional area of pore in described beginning of described gassed-out zone usually at the cross sectional area at described air outlet place; Preferably, the cross sectional area of the pore of described gassed-out zone at described air outlet place at the pore of described gassed-out zone between 130% to 200% of the cross sectional area of described beginning.

This kind of nozzle can make main body carry out not oblique position relative to base portion to slide into oblique position, be conducive to nozzle and change air-out direction easily on vertical plane, to meet the different requirements of user; The turbulent flow entering the inner passage of main body from pneumatic tube can be made simultaneously to reduce, be conducive to the flow loss reducing air-flow and the noise produced; In addition, the pneumatic tube of this kind of structure be slidably connected with frame as the critical piece of nozzle inclination mechanism, its stabilized structure, not yielding, be conducive to being well on and reliable tilt operation, be conducive to preventing flow leakage when sliding, and improve the overall appearance degree of nozzle.

The above-mentioned feature about the utility model first aspect is also applied to second aspect of the present utility model equally, and vice versa.

Accompanying drawing explanation

Figure l is the schematic diagram of fan of the present utility model.

Fig. 2 is the side view of the fan shown in figure l.

Fig. 3 is the schematic diagram of the nozzle of the fan shown in figure l.

Fig. 4 is the side view of the nozzle of the fan shown in figure l.

Fig. 5 is the schematic diagram of the pedestal of the fan shown in figure l.

Fig. 6 is the sectional view of amplification of the nozzle intercepted along the line A-A in Fig. 3.

Fig. 7 is the sectional view of amplification of the nozzle intercepted along the line B-B in Fig. 4.

Fig. 8 is the schematic perspective view of the amplification of the base portion of the nozzle shown in Fig. 3.

Fig. 9 is the sectional view of amplification of the pedestal of the fan intercepted along the line C-C in Fig. 5.

Figure 10 is the side view of the fan shown in Fig. 1 when nozzle body is tilted forward to a certain position.

Figure 11 is that the fan shown in Fig. 1 tilts backwards to side view during a certain position at nozzle body.

Figure 12 illustrates the replacing structure of the base portion of the nozzle shown in Fig. 8.

Embodiment

Figure l is the schematic diagram of the fan of the present utility model from device forward observation, and Fig. 2 is the side view of the fan shown in figure l.As can be seen from Fig. 1 and Fig. 2, the nozzle 1 that fan 100 comprises pedestal 2 and is positioned on pedestal 2.The top base 8 that pedestal 2 comprises bottom base 10 and is positioned on bottom base 10, upper base portion 8 comprises multiple buttons 11,12 and 13 of air intlet 9 and user-operable, and air intlet 9 is for being formed in the form in the multiple holes on top base shell.The air of fan outside is inhaled in top base 8 by air intlet 9.

Fig. 3 is the schematic diagram of the nozzle of the fan shown in figure l, and Fig. 4 is the side view of the nozzle of the fan shown in figure l.As can be seen from Fig. 3 and Fig. 4, nozzle 1 comprises main body 4 and base portion 3.And with reference to figure 6, Fig. 7 and Fig. 8, base portion 3 comprises pneumatic tube 15, pneumatic tube 15 comprises air inlet section 15a and is positioned at the gassed-out zone 15b in described air inlet section 15a downstream, and air inlet section 15a comprises suction port 45, and gassed-out zone 15b comprises air outlet 46; Pneumatic tube 15 also comprises two slidable bars 48, and the outer surface of gassed-out zone 15b comprises first surface 41, second curved surface 42, first plane 50a and the second plane 50b, and wherein, first surface 41 and the second curved surface 42 are cylndrical surface; Pneumatic tube 15 is made up of anterior bulb portion 16a and rear portion bulb portion 16b, pneumatic tube 15 is divided into two-part and is shaped, to assemble with main body 4.

Main body 4 comprise frame 6, for accept air-flow inner passage 14, for launching the relief opening 7 of air-flow, the opening 40 for allowing pneumatic tube 15 stretch into.Frame 6 comprises two sliding-grooves 47, and this sliding-groove 47 matches with the slidable bar 48 of pneumatic tube, can carry out slip with the main body 4 realizing nozzle relative to base portion 3.The internal surface of frame 6 comprises the 3rd curved surface 43 and the 4th curved surface 44,3rd curved surface 43 and the 4th curved surface 44 respectively with first surface 41 and second curved surface 42 sliding contact of pneumatic tube 15, make the main body 4 of nozzle can carry out slip relative to base portion 3 smoothly, and prevent air-flow from leaking.

In Fig. 6 and Fig. 8, can clearly be seen that, the cross sectional area of the pore 49 of the gassed-out zone 15b of pneumatic tube 15 increases from the beginning 52 of gassed-out zone gradually to air outlet 46, the turbulent flow being conducive to like this making to enter from pneumatic tube 15 inner passage 14 of main body 4 reduces, thus the flow loss reducing air-flow and the noise produced.

In the present embodiment, the length D of gassed-out zone 15b is 15mm, the shape of the cross section of the pore 49 of gassed-out zone 15b is rectangle, and the pore 49 of gassed-out zone 15b is about 145% of the cross sectional area of pore 49 in beginning 52 of gassed-out zone 15b at the cross sectional area at air outlet 46 place.

In the present embodiment, main body 4 has the frame 6 of annular and defines the through hole 5 being positioned at central authorities, relief opening 7 is positioned at the front portion of main body 4 and is set to launch air-flow before fan, and the air-flow launched from relief opening 7 to be roughly parallel to the direction of axis X in the outlet port of relief opening 7; The front housing part 6a that frame 6 comprises rear housing portion 6b and is made up of housing 611, housing 612 and multiple fixed block (not shown in FIG.), relief opening 7 limited by the apparent surface of housing 611 with housing 612, fixed block be arranged in inner passage 14 and with the outlet of relief opening 7 at intervals, housing 611, housing 612 and fixed block are integrally, namely integrated.

Frame 6 is made up of front housing part 6a and rear housing portion 6b, and pneumatic tube 15 is made up of anterior bulb portion 16a and rear portion bulb portion 16b, assembles in the opening 40 being conducive to pneumatic tube 15 to go deep into smoothly frame 6; Because the size of the air inlet section of pneumatic tube 15 wants large compared with the opening 40 of frame 6, assemble in the opening 40 that integrally formed pneumatic tube 15 is difficult to go deep into smoothly frame 6.

In the present embodiment, relief opening 7 is slot-shaped relief opening, and its relief opening 7 is about 1.5mm at the width in outlet port, and the distance between the outlet of fixed block and relief opening 7 is about 5mm.

Fig. 5 is the schematic diagram of the pedestal of the fan shown in figure l, and Fig. 9 illustrates the internal structure of pedestal.As can be seen from Fig. 5 and Fig. 9, pedestal 2 comprises bottom base 10 and has the top base 8 of shell 21, is provided with the motor 24 of impeller chimney 22, impeller 23 and drives impeller 23 rotary work in the shell 21 of top base 8.Impeller 23 is positioned at impeller chimney 22, and impeller chimney 22 comprises air intlet 34 and air outlet slit 35.

Motor 24 is contained in motor casing 25.Motor casing 25 comprises upper part 26 and lower part 27, and upper part 26 is fixed by screw and lower part 27 and is fixed therein by motor 24.The rotating shaft 38 of motor 24 is positioned at the hole of bottom through the lower part 27 being formed in motor casing 25, be connected in rotating shaft 38 to allow impeller 23.The upper part 26 of motor casing 25 also comprises multiple fixing rod 31, and motor 24 is fixed with impeller chimney 22 by multiple fixing rods 31 of motor casing 25.

In the present embodiment, impeller 23 and impeller chimney 22 are configured as when impeller 23 and motor casing 25 are supported by impeller chimney 22, the blade tips of impeller 23 very close to the internal surface of impeller chimney 22, but does not touch this internal surface, and impeller 23 is roughly coaxial with impeller chimney 22.

Impeller chimney 22 is provided with cable punching hole (not shown in FIG.), a fixing rod 31 of motor casing 25 is also provided with cable punching hole (not shown in FIG.), cable punching hole on impeller chimney 22 is aimed at the cable punching hole on fixing rod 31 and cable can be passed, and is connected to motor 24 from circuit arrangement 37 to facilitate cable.In the present embodiment, motor casing 25, impeller chimney 22 and impeller 23 preferably formed by plastics.

The gas skirt 32 of the air-flow convergence formed by impeller 23 is also provided with in shell 21, the lower end of gas skirt 32 is connected with motor casing 25, the output terminal 33 that upper end and the shell 21 of gas skirt 32 have air outlet slit 39 is connected, and the outlet of gas skirt 32 is communicated with the pneumatic tube 15 of nozzle 1.Preferably, between gas skirt 32 and pneumatic tube 15, be connected with one section of flexible pipe, as one section of rubber pipe, use flexible pipe can decay motor and impeller some vibration and noise transmit to nozzle 1; Pneumatic tube 15 is connected with the output terminal 33 of shell 21 preferably by fastener, and fastener can make pneumatic tube 15 throw off with the output terminal 33 of shell 21 by applying pressure.

The cross section of the inner passage of gas skirt 32 comprises circle and rectangle.Preferably, the cross section of the partial interior passage of gas skirt 32 is circular, and the cross section of the partial interior passage of gas skirt 32 is round rectangle.In a preferred embodiment, the cross section of the inner passage of gas skirt 32 is transitioned into round rectangle along the flow direction of air-flow gradually from circle.

Impeller chimney 22 support by multiple supporting member 29.Can be clear that in fig .9, supporting member 29 is a spring element.In the present embodiment, the quantity of supporting member 29 is 4, and namely the quantity of spring element is 4, and the upper end of spring element is fixed with the projection 30 be formed on impeller chimney 22 outer surface, and the lower end of spring element is fixed on the pedestal 28 that is connected with shell 21.Because supporting member 29 is spring element, spring element effectively can absorb some vibration and noises from motor 24 and impeller 23, otherwise these vibrations and noise easily pass to shell 21 by impeller chimney 22 and amplify.

Bottom base 10 is for engaging the surface at fan 100 place.Pedestal 2 also comprises the swing mechanism for making top base 8 swing back and forth relative to bottom base 10, and this swing mechanism comprises syncmotor 36, and the operation of swing mechanism responds user by circuit arrangement 37 and presses the button 13 and control.Hunting range is preferably between 60 ° and 120 °, and swing mechanism is set to 3 to 6 deflection periods of execution per minute.Cable (not drawing) for supplying power to fan extends through the hole be formed on bottom base 10.

In the present embodiment, motor 24 is DC Brushless Motor, and the rotating speed of motor responds user operation button 12 by circuit arrangement 37 and changes.

In order to operate fan 100, user presses the button 11, responds this operation, and circuit arrangement 37 activates motor 24 with rotary blade 23.The rotation of impeller 23 makes air be entered in the shell 21 of pedestal 2 by air intlet 9.The air-flow that impeller 23 is formed is transported in nozzle 1 after gas skirt 32 converges.

In nozzle 1, air-flow divides two strands to advance in the inner passage 14 of main body 4.The air-flow of advancing in inner passage 14 launch by relief opening 7, partial air around nozzle by from relief opening 7 the air-flow launched entrainment, the air-flow launched from relief opening 7 like this be bonded by the air-flow that entrainments the total air flow launched forward from nozzle 1.

Figure 10 illustrates the side view of the fan shown in Fig. 1 when nozzle body is tilted forward to a certain position, and Figure 11 illustrates the fan shown in Fig. 1 and tilts backwards to side view during a certain position at nozzle body.As can be seen from Figure 10 and Figure 11, main body 4 carries out relative to base portion 3 adjustment sliding or carry out inclination, and the air-out direction of nozzle 1 can be made to change in vertical plane, to meet the different demands of user.

Figure 12 illustrates the replacing structure of the base portion of the nozzle shown in Fig. 8.Easily find out from Figure 12, the base portion of the nozzle shown in the base portion of the nozzle of the present embodiment and Fig. 8 is different.In the present embodiment, the base portion 3 of nozzle 1 also comprises two pieces of bending slide plate 51a, 51b, and they are connected with the tube wall of pneumatic tube 15 at air outlet place, preferably, the tube wall of two pieces of bending slide plate 51a, 51b and pneumatic tube 15 integrally, i.e. integration.The base portion 3 of this kind of structure, is conducive to the inner passage 14 making to flow to main body 3 from the fraction of pneumatic tube output from two side direction low-losses.

Although shown and described and thought preferred embodiment of the present utility model at present, but it is apparent, those skilled in the art can carry out various changes and improvements, such as, the cross sectional area of the shape of the pore of pneumatic tube, the length of the gassed-out zone of pneumatic tube and the pore of gassed-out zone can be selected or change along the ratio increased gradually of outgassing direction, in pneumatic tube, can conducting element etc. be set, all belongs to the scope of the present utility model that appended claims limits.

Claims (10)

1. a fan, it is characterized in that, the nozzle that described fan comprises pedestal and is connected with described pedestal, described nozzle comprises base portion and main body, described main body can relative to described base portion never oblique position slide into oblique position, described base portion comprises pneumatic tube, described pneumatic tube comprises air inlet section and is positioned at the gassed-out zone in described air inlet section downstream, described air inlet section comprises suction port, described gassed-out zone comprises air outlet, first surface and the second curved surface, the cross sectional area of the pore of described gassed-out zone increases from the beginning of gassed-out zone gradually to described air outlet, described main body comprises frame, inner passage, relief opening and the opening for allowing described pneumatic tube stretch into, described frame comprises the 3rd curved surface coordinated with first surface and the 4th curved surface coordinated with the second curved surface and defines through hole, wherein, described pneumatic tube and described frame are slidably connected, described air outlet is positioned at described opening, one in described pneumatic tube and described frame comprises slidable bar, another in described pneumatic tube and described frame comprises the sliding-groove coordinated with described slidable bar, when relative to described base portion, never oblique position slides into oblique position to described main body, described opening towards changing.

2. the fan as described in claim l, is characterized in that, the shape of the cross section of the pore of described gassed-out zone is rectangle.

3. the fan as described in claim l, is characterized in that, the length of described gassed-out zone is between 8mm to 60mm.

4. the fan as described in one of claim l to 3, it is characterized in that, the rear housing portion that described frame comprises front housing part and is connected with front housing part, the rear portion bulb portion that described pneumatic tube comprises anterior bulb portion and is connected with anterior bulb portion.

5. the fan as described in one of claim l to 3, is characterized in that, the pore of described gassed-out zone is not less than 125% of the cross sectional area of pore in described beginning of described gassed-out zone at the cross sectional area at described air outlet place.

6. the fan as described in one of claim l to 3, is characterized in that, described base portion also comprises two pieces of bending slide plates, and these two pieces of slide plates are connected with the tube wall of pneumatic tube at air outlet place.

7. the fan as described in one of claim l to 3, is characterized in that, described gassed-out zone also comprises the first plane and the second plane.

8. the nozzle for fan, it is characterized in that, described nozzle comprises base portion and main body, described main body can relative to described base portion never oblique position slide into oblique position, described base portion comprises pneumatic tube, described pneumatic tube comprises air inlet section and is positioned at the gassed-out zone in described air inlet section downstream, described air inlet section comprises suction port, described gassed-out zone comprises air outlet, first surface and the second curved surface, the cross sectional area of the pore of described gassed-out zone increases from the beginning of gassed-out zone gradually to described air outlet, described main body comprises frame, inner passage, relief opening and the opening for allowing described pneumatic tube stretch into, described frame comprises the 3rd curved surface coordinated with first surface and the 4th curved surface coordinated with the second curved surface and defines through hole, wherein, described pneumatic tube and described frame are slidably connected, described air outlet is positioned at described opening, one in described pneumatic tube and described frame comprises slidable bar, another in described pneumatic tube and described frame comprises the sliding-groove coordinated with described slidable bar, when relative to described base portion, never oblique position slides into oblique position to described main body, described opening towards changing.

9. nozzle as claimed in claim 8, it is characterized in that, the shape of the cross section of the pore of described gassed-out zone is rectangle.

10. the nozzle as described in one of claim 8 to 9, is characterized in that, the pore of described gassed-out zone is not less than 125% of the cross sectional area of pore in described beginning of described gassed-out zone at the cross sectional area at described air outlet place.