CN207365178U - Prevent the structure of air inlet and air outlet short circuit - Google Patents

Abstract

The utility model discloses a kind of structure for preventing air inlet and air outlet short circuit, belong to heating installation, existing wind warms up type bathroom heating device and is only capable of to specific direction or local blowing ratio, influence the comfort of people, bathroom is slower by the cold speed to warm, the utility model sets air inlet on bracket component and is looped around the second ring-type air-out passage of air inlet periphery, the external port of second ring-type air-out passage is tilted in bell mouth shape to periphery, making air-out direction, the air that preventing air inlet and air outlet short circuit causes air inlet to flow out directly flows back to air outlet away from air inlet；And, air outlet is formed between the outboard containment side of bracket component, inner side binding side, make the edge on outboard containment side be higher than the edge of inner side binding side, reduce the reflux that the small rising characteristic of warm air density is brought, block the warm wind produced by boasting from air outlet and directly sucked by air inlet；Apply it on heater and realize 360 ° of outlet air, allow heating to be evenly distributed, bathroom warms soon, improves the comfort of people.

Description

Prevent the structure of air inlet and air outlet short circuit

Technical field

The utility model belongs to heating installation, and in particular to a kind of structure for preventing air inlet and air outlet short circuit.

Background technology

It is all that air is flowed through rectangle ptc heater to realize heating that wind, which warms up type bathroom heating device, above market, then with fixation Direction or the direction controlling wind direction outlet air by adjusting shutter, air-out direction can only keep a direction or in waving shape, Last warm air is spread to bathroom, and the heater spread again after this warm wind outlet air has a disadvantage that：

1. easily making bathroom heating skewness or only keeping local warm wind, the comfort of people is influenced.

2. heating is slower by the cold speed to warm by bathroom.

3. air outlet against human body blow when, heating easily make one with water evaporation it is too fast, absorb human heat it is very fast, hold Easily cause human body uncomfortable.

Utility model content

The technical problems to be solved in the utility model and the technical assignment proposed are to overcome existing wind to warm up type bathroom heating device The defects of being only capable of to specific direction or local blowing ratio, there is provided one kind is suitable for 360 ° of outlet air and prevents air inlet and air outlet short circuit Structure.

To reach above-mentioned purpose, the structure for preventing air inlet and air outlet short circuit of the utility model, including bracket component, The bracket component is equipped with the air inlet for being located at middle part and the second ring-type outlet air for being looped around the air inlet periphery Passage, the external port of the second ring-type air-out passage are tilted in bell mouth shape to periphery.

As optimization technique means：The bracket component has outboard containment side, inner side binding side, the outboard containment The external port of the second ring-type air-out passage is formed between side, inner side binding side, the edge on the outboard containment side is higher than institute State the edge of inner side binding side.

As optimization technique means：Between the external port of the second ring-type air-out passage and the air inlet keep away from From.

As optimization technique means：The bracket component includes mask, and the air inlet is arranged on the mask.

As optimization technique means：The bracket component include fit together upper inner support, upper support arm, under Inner support, lower support arm, the upper support arm is around the upper inner support, and the lower support arm is around the lower inner support, institute State support arm, lower support arm forms the external annulus of the second ring-type air-out passage, the upper inner support, lower inner support composition The internal ring wall of the second ring-type air-out passage.

The utility model by bracket component be equipped with positioned at middle part air inlet and be looped around air inlet periphery The second ring-type air-out passage, the external port of the second ring-type air-out passage tilts in bell mouth shape to periphery, makes air-out direction remote From air inlet, the air that preventing air inlet and air outlet short circuit causes air inlet to flow out directly flows back to air outlet；Moreover, pass through The external port of the second ring-type air-out passage is formed between the outboard containment side of bracket component, inner side binding side, makes outboard containment side Edge be higher than inner side binding side edge, reduce the reflux that the small rising characteristic of warm air density is brought, block from outlet air The warm wind that mouth is produced by boasting directly is sucked by air inlet；Further, between the external port of the second ring-type air-out passage and air inlet Keep at a distance, so as to increase the path that the warm wind produced by boasting from air outlet flows to air inlet, so make to come out from air outlet warm Air keeps spreading along air-out direction to bathroom as much as possible, hence it is evident that and the short-circuit effect for reducing air outlet and air inlet occurs, Accelerate the heating speed in bathroom.

Brief description of the drawings

Fig. 1 a apply a kind of structure diagram on heater for the embodiment of the utility model；

Air flow direction schematic diagram during the shown heater work that Fig. 1 b are Fig. 1 a；

Fig. 2 is the ring-type electric heater assembling structure schematic diagram of the utility model heater embodiment one；

Fig. 3 is the structure diagram of the upper support arm of the utility model heater embodiment one；

Fig. 4 is the structure diagram of the upper inner support of the utility model heater embodiment one；

Fig. 5 is the structure diagram of the lower support arm of the utility model heater embodiment one；

Fig. 6 is the structure diagram of the lower inner support of the utility model heater embodiment one；

Fig. 7 is that the ring-type electric heater of the utility model heater embodiment one and external annulus, internal ring wall keep gap Schematic diagram；

Fig. 8 is the ring-type electric heater and the schematic diagram of upper inner support assembling of the utility model heater embodiment one；

Fig. 9 a are the lower inner support and the schematic diagram of lower support arm assembling of the utility model heater embodiment one；

Fig. 9 b are the A portions enlarged diagram of Fig. 9 a；

Figure 10 is ring-type electric heater and the upper inner support of the utility model heater embodiment one, lower inner support, lower outer The schematic diagram of stent assembling；

Figure 11 a are ring-type electric heater and the upper inner support of the utility model heater embodiment one, lower inner support, lower outer Stent, the schematic diagram of upper support arm assembling；

Figure 11 b are the B portions enlarged diagram of Figure 11 a；

Figure 12 is a kind of schematic diagram of structure of the utility model ring-type electric heater；

Figure 13 is the schematic diagram of another structure of the utility model ring-type electric heater；

Figure 14 is the schematic diagram of centrifugal blower inner air reflux；

Figure 15 is that the centrifugal blower of the utility model prevents the structure diagram that inner air flows back；

Figure 16 a apply another structure diagram on heater for the embodiment of the utility model；

Air flow direction schematic diagram during the shown heater work that Figure 16 b are Figure 16 a；

Figure 17 a be ring-type electric heater and the upper inner support of the embodiment two of the utility model heater, lower inner support, under The schematic diagram for the section view position that support arm, upper support arm assemble；

Figure 17 b be ring-type electric heater and the upper inner support of the embodiment two of the utility model heater, lower inner support, under The schematic diagram for another section view position that support arm, upper support arm assemble；

Figure 18 applies the third structure diagram on heater for the embodiment of the utility model；

Figure label explanation：

01- motors；

02- centrifugal wind wheels：21- wheel hubs, 22- centrifugal flabellums, 23- lower faces；

03- cylinder shells, 31- arcuation guide surfaces, 32- the first ring-type air-out passages；

04- bracket components：41- air inlets, 42- the second ring-type air-out passages, 43- inner concaves, 44- annular grooves, 45- are upper interior Stent, the upper support arms of 46-, inner support under 47-, support arm under 48-, 49- masks, 410- rings side, 411- outboard containments side, 412- Inner side binding side, 413- external annulus, 414- internal ring walls, 415- gaps, positioning bar in 416-, the outer positioning bars of 417-, 418- are upper outside Wing plate, wing plate in 419- is upper, outer wing plate under 420-, interior wing plate under 421-, 422- locating slots, the first screw columns of 423-, 424- the One through hole, the second through holes of 425-, the second screw columns of 426-, 427- third through-holes, 428- fourth holes, 429- support arms；

05th, 05a, 05b- ring-type electric heater：51a, 51b- gas channel, 52a, 52b- radiator, 53-PTC potsherds, 54a, 54b- ring electrode, 55a, 55b- radiating fin, 56- wire connection terminals；

06- detours gap.

Embodiment

The utility model is described further below in conjunction with Figure of description.

The structure for preventing air inlet and air outlet short circuit of the utility model, is the heating element for forming heater, therefore Prevent air inlet and the structure of air outlet short circuit from illustrating the utility model below in conjunction with whole heater.

As shown in Fig. 1 a, Figure 16 a, Figure 18, the present invention is respectively illustrated（Utility model）The three of the heater of 360 ° of outlet air Kind of structure, two kinds of structures there is common structure and can realize it is same, to avoid repeating, hereinafter to three's Common ground illustrates that the difference part to three illustrates respectively together：

The heater of 360 ° of outlet air, including the centrifugal wind wheel 02 driven by motor 01, centrifugal wind wheel 02 are placed in a cylinder In shape housing 03, the first ring-type air-out passage 32 is formed between centrifugal wind wheel 02 and cylinder shell 03, cylinder shell 03 Upper end closed, lower end mount support component 04, bracket component 04 be equipped with positioned at middle part air inlet 41 and be looped around into Second ring-type air-out passage 42 of air port periphery, the external port of the second ring-type air-out passage 42 is air outlet, and air inlet 21 corresponds to The end face of centrifugal wind wheel 02, the second ring-type air-out passage 42 be connected with the first ring-type air-out passage form full section ring-type outlet air lead to Road, full section ring-type air-out passage are built-in with ring-type electric heater 05.The motor, can be as shown in Figure 1a with a case cover Get up, can also be exposed as illustrated in fig 16 a.

The heater, as shown in Fig. 1 b and Figure 16 b, motor 01 drives centrifugal wind wheel 02 to rotate, by room air from inlet air Mouth 41 sucks and through full section ring-type air-out passage（That is the first ring-type air-out passage, the second ring-type air-out passage 42）Discharge, it is indoor Air flows through ring-type electric heater 05 and is heated, so circulation, and indoor air circulation is heated, so as to fulfill heating.Fig. 1 b, The flow direction for the air-flow that the direction of arrow in Figure 16 b, Figure 14, Figure 15 is indicated.

It is achieved in air-heating bathroom heater and heating is diffused into bathroom with 360 ° of to all the winds outlet air, allows heating to be evenly distributed, It will not cause heating skewness or keep local warm wind.Bathroom is accelerated by the cold speed to warm.Realize air-heating bathroom heater with Give people to warm oneself from the mode of surrounding parcel human body, warm wind will not dry against human body, improve the comfort of people.

Referring to Fig. 1 a, Figure 16 a, Figure 18, in order to increase mobility of the air in housing, avoiding the formation of vortex reduces stream Amount, the upper end that cylinder shell 03 is closed are equipped with arcuation guide surface 31, and the center of curvature of arcuation guide surface is located at cylinder shell Inner side.

Referring to Fig. 1 a, Figure 16 a, Figure 18, in order to increase the suction of centrifugal wind wheel, centrifugal wind wheel 02 includes what is be connected with motor Wheel hub 21 and the centrifugal flabellum 22 being connected with wheel hub, centrifugal flabellum 22 are hypsokinesis centrifugal flabellum.

Referring to Fig. 1 a, Figure 16 a, Figure 18, inner air reflux in order to prevent, reduces wind loss, improves heating air output, Noise is reduced, centrifugal wind wheel 02 has a lower face 23, and lower face 23 coordinates with 04 detour of bracket component, increases inner air The resistance of reflux, to prevent inner air reflux.

Referring to Fig. 1 a, Figure 16 a, Figure 18, lower face 23 is arcuate surface, and the outer edge of lower face 23 is higher than inner edges；Branch Frame component 04 has inner concave 43；Inner concave 43 matches to form detour cooperation with arcuate surface, between inner concave 43 and arcuate surface Detour gap 06 is formed, which is ensureing increase inner air reflux resistance, preventing inner air reflux（It is internal empty Gas flows back referring to Figure 14, prevents inner air reflux referring to Figure 15）While, avoid centrifugal wind wheel lower face 23 and bracket component 04 contact and ensure centrifugal wind wheel can smooth rotation, can also avoid caused by the foozle and rigging error of parts Centrifugal wind wheel lower face contacts interference with bracket component.The size in detour gap is generally 2-8mm.

Bracket component 04 has an annular groove 44, and the inward flange of lower face 23 stretches into annular groove 44 and forms detour cooperation.Specifically , bracket component 04 includes upper inner support 45, and annular groove 44 is arranged on upper inner support 45（Referring to Fig. 1 a, Figure 18）；Alternatively, stent group Part 04 includes upper inner support 45, the mask 49 with the assembling of upper inner support, the common shape in position that upper inner support 45 is combined with mask 49 Into annular groove 44（Referring to Figure 16 a）.

Inner air flows back in order to prevent, reduces wind loss, improves heating air output, reduces noise, bracket component 04 Also there is a raised ring side 410（Referring to Fig. 1 b, Fig. 2）, ring side 410 forms detour around lower face 23 and coordinates, as schemed institute Show that the raised ring side 410 is located on upper inner support 45.

Referring to Fig. 1 a, Figure 16 a, Figure 18, in order to realize uniform outlet air, centrifugal wind wheel 02 is coaxially set with cylinder shell 03 Put.

Referring to Fig. 1 a, Figure 16 a, Figure 18, in order to realize more preferable heating effect, air-out direction is set to be prevented away from air inlet The air that air inlet causes air inlet to flow out with air outlet short circuit directly flows back to air outlet, outside the second ring-type air-out passage 42 The air outlet of port is tilted in bell mouth shape to periphery, avoids warm wind from drying against human body, improves the comfort of people, allows heating It is evenly distributed, accelerates bathroom by the cold speed to warm, realize that air-heating bathroom heater gives people to warm oneself in a manner of wrapping up human body from surrounding.

Referring to Fig. 1 a, Figure 16 a, Figure 18, in order to avoid preventing air inlet 41 and air outlet short circuit, accelerate the heating speed in bathroom Degree, i.e., in order to avoid the warm wind produced by boasting from air outlet is directly sucked by air inlet, bracket component 04 has outboard containment side 411st, inner side binding side 412, forms the external port of the second ring-type air-out passage, outside between outboard containment side, inner side binding side The edge of binding side 411 is higher than the edge of inner side binding side 412, reduces the reflux that the small rising characteristic of warm air density is brought, The warm wind produced by boasting from air outlet is blocked directly to be sucked by air inlet.

Referring to Fig. 1 a, Figure 16 a, Figure 18, keep at a distance between the external port and air inlet 41 of the second ring-type air-out passage 42, So as to increasing the path that the warm wind produced by boasting from air outlet flows to air inlet, so make the warm air come out from air outlet as far as possible Keep spreading along air-out direction to bathroom more, hence it is evident that the short-circuit effect for reducing air outlet and air inlet occurs, and accelerates bathroom Heating speed.

04 bracket component includes mask 49, and air inlet 41 is arranged on mask 49.

In order to increase the sectional area that air-flow flows through ring-type electric heater, ring-type electric heater 05 leads to full section ring-type outlet air Gap 415 is kept between the side wall in road 42.Because the presence in the gap 415, air is except can be from the upper of ring-type electric heater Surface enter ring-type electric heater and be heated it is outer, can also directly through gap 415 by the side heat of ring-type electric heater, Allow windage suffered by air to diminish, increase the heating surface (area) (HS of ring-type electric heater, reduce noise, improve adding for ring-type electric heater The thermal efficiency.

Specifically, the side wall of full section ring-type air-out passage is equipped with interior positioning bar 416, outer positioning bar 417, interior positioning bar The outer circumferential surface positioning of 416 pairs of ring-type electric heaters 05 keeps gap, and outer positioning bar 417 determines the inner peripheral surface of ring-type electric heater 05 Position keeps gap 415.Moreover, bracket component 04 includes internal ring wall 414, the external annulus 413 around internal ring wall 414, internal ring wall 414 The second ring-type air-out passage 42 is formed between external annulus 413.

Realizing a kind of concrete structure in the gap 416 is：Interior positioning bar 416 is set on the medial surface of external annulus 413（Referring to Fig. 2, Fig. 3）, internal ring wall 414 lateral surface on set outer positioning bar 417（Referring to Fig. 2, Fig. 4）.At this time, ring-type electric heater 05 with The gap 415 is formed between external annulus 413, between ring-type electric heater 05 and internal ring wall 414.It is interior positioning bar 416, outer fixed The width 2-5mm of position muscle 417, that is, the size for thereby determining that gap 415 is 2-5mm, interior positioning bar 416, the thickness of outer positioning bar 417 Spend about 1-5mm.

Referring to Fig. 2, Figure 17 a Figure 17 b, Figure 18, in order to reduce windage, reduce noise, improve the efficiency of heating surface and solve stent Because of hanging the problem of being difficult to installation, a kind of structure of bracket component 04 is component：Including fit together upper inner support 45, Upper support arm 46, lower inner support 47, lower support arm 48, upper support arm 46 is around upper inner support 45, and lower support arm 48 is around lower interior Stent 47, upper support arm 46, lower support arm 48 form external annulus 413, and upper inner support 45, lower inner support 47 form internal ring wall 414.

In view of the bracket component of said structure, for the ease of assembling ring-type electric heater, outer wing is set on upper inner support 45 Plate 418（Referring to Fig. 4）, the upper surface inward flange of upper 418 pressure holding ring-type electric heater 05 of outer wing plate；In being set on upper support arm 46 Wing plate 419（Referring to Fig. 3）, the upper surface outer edge of upper interior 419 pressure holding ring-type electric heater 05 of wing plate；Set on lower inner support 47 Outer wing plate 420（Referring to Fig. 6）, the lower face inward flange of lower 420 pressure holding ring-type electric heater 05 of outer wing plate；Set on lower support arm 48 Wing plate 421 in lower（Referring to Fig. 5）, the lower face outer edge of lower interior 421 pressure holding ring-type electric heater of wing plate.

Upper inner support 45, upper support arm 46, lower inner support 47, lower support arm 48 are assembled together by fastener and by rings Shape electric heater is constrained in the second ring-type air-out passage.So as to make inner support, upper support arm, lower inner support, lower support arm, Ring-type electric heater forms an entirety, then this is integrally assembled（Such as pass through fastener）On housing.

Upper inner support, upper support arm, lower inner support, lower support arm, ring-type electric heater are specifically assembled into integral press Following process carries out：

Ring-type electric heater 05 is sleeved on upper inner support 45 as shown in Figure 8, outer wing plate 418 contacts ring-type electrical heating in order The upper surface inward flange of device and support ring-type electric heater；

As Fig. 9 a, Fig. 9 b assemble lower inner support and lower support arm：The locating slot 422 of lower outer 48 framves is sleeved on lower inner support On the first screw column 423 on 47, on lower support arm 47 first through hole 424 is directed at the first screw column 423, allow lower inner support 47 with lower support arm 48 into being integral；

Ring-type electric heater together, upper inner support will be assembled shown in Fig. 8 as shown in Figure 10 together with being assembled shown in Fig. 9 a Lower inner support, lower support arm assembling：Second screw column of the upper inner support 45 of the second through hole 425 alignment on lower inner support 47 426, the lower face inward flange of lower 420 pressure holding ring-type electric heater of outer wing plate；In lower under 421 pressure holding ring-type electric heater of wing plate End face outer edge；Upper inner support 45, lower inner support 47, lower support arm 48 are connected to become an entirety with screw；

Overall package shown in finally as shown in Figure 11 a, Figure 11 b by upper support arm and Figure 10：On upper support arm 46 First through hole 424 on the lower support arm 48 of three through holes 427 alignment, the entirety shown in Figure 10 and upper support arm 46 are connected by screw Connect and allow the upper surface outer edge of interior 419 pressure holding ring-type electric heater of wing plate, so as to make ring-type electric heater more constant；So Constitute the structure shown in Fig. 2.The installation method solves the problems, such as that inner support is difficult to installation because hanging.

Assembling process and structure shown in above-mentioned Fig. 8-11b, not unique implementation, when specific implementation, can also borrow Fastener such as screw is helped to be otherwise attached to fasten by upper support arm, upper inner support, lower inner support, lower support arm.Such as figure 17a, Figure 17 b then show similar assembling fastening means.

Realize that second of concrete structure in the gap 416 is as shown in figure 18：Set on the inner wall of cylinder shell 03 default Position muscle 416, internal ring wall 414 lateral surface on set outer positioning bar 417.At this time, ring-type electric heater 05 and cylinder shell 03 The gap is formed between inner wall, between ring-type electric heater 05 and internal ring wall 414.

In view of realizing second of concrete structure in the gap 416, bracket component can also use the another kind shown in Figure 18 Structure, the bracket component include the upper inner support 45, lower inner support 47, the support arm 429 that fit together, upper inner support 45, Lower inner support 47 forms internal ring wall 414, and support arm 429 is as external annulus and around internal ring wall 414.

In view of the bracket component of structure shown in Figure 18, for the ease of assembling ring-type electric heater, sets on upper inner support 45 Outer wing plate 418, the upper surface inward flange of upper 418 pressure holding ring-type electric heater 05 of outer wing plate；Set on the inner wall of cylinder shell 03 Wing plate 419 in upper, the upper surface outer edge of upper interior 419 pressure holding ring-type electric heater 05 of wing plate；Outer wing is set on lower inner support 47 Plate 420, the lower face inward flange of lower 420 pressure holding ring-type electric heater 05 of outer wing plate；Interior wing plate 421 is set on support arm 429, under The lower face outer edge of interior 421 pressure holding ring-type electric heater 05 of wing plate.Moreover, upper inner support 45, lower inner support 47, support arm 429 are assembled together and ring-type electric heater 05 are constrained in the second ring-type air-out passage 42 to go out with the first ring-type by fastener The channel attached position of wind.

When it is implemented, assembling mask 49 on the lower inner support of embodiment one as shown in Figure 1 a, 1 b, air inlet 21 is arranged on On mask 49；Alternatively, such as Figure 16 a, Figure 16 b, Figure 17 a, Figure 17 b illustrated embodiments two, the lower interior branch of embodiment illustrated in fig. 18 three Mask 49 is integrally formed with frame 45, air inlet is arranged on mask.

As Figure 12, with 13 shown in, ring-type electric heater 05a/05b is integrally annular in shape, its can be completely enclosed ring-type, It can also be disconnected at some position, it has the gas channel 51a/51b axially extended, and gas channel 51a/51b is for stream Vent flow is with to the air-flow flowed through heating.

Specifically, ring-type electric heater 05a, 05b include radiator 52a/52b, radiator 52a/52b is annular in shape, air-flow Passage 51a/51b is formed on radiator 52a/52b.

The radiator 52a/52b of different-diameter is nested together, and is equipped with what is contacted with radiator between adjacent radiator PTC ceramics piece 53, makes PTC ceramics piece produce heat PTC ceramics piece supply electric energy and passes to radiator.

Radiator 52a/52b includes the ring electrode 54a/54b and radiating fin 55a/55b being distributed along ring electrode, gas Circulation road is formed in the side of radiating fin, ring electrode connection wire connection terminal；Ring electrode is used to supply electricity to PTC ceramics piece Can, ring electrode is generally directly contacted with PTC ceramics piece, but is not excluded for indirectly to supplying electric energy to PTC ceramics piece, for example entirely Radiator is by thermal conductivity material（Such as aluminum or aluminum alloy）It is made.Specifically, radiating fin is to make in ring electrode side Wing plate；Alternatively, radiating fin 55b is the wavy sheet metal with ring electrode heat conduction configuration（Referring to Figure 13）；Alternatively, radiator Gas channel handle type is opened up vertically into the gusset shape radiating fin 55a of isolation gas channel（Referring to Figure 12）.

The ring-type electric heater, makes exhaust air flue more smooth, allows whole ring-type air-out passage to be all heating passage, improves The efficiency of heating surface, installation is easier, saves cost.

Claims (5)

1. prevent the structure of air inlet and air outlet short circuit, including bracket component（04）, it is characterized in that：The bracket component （04）It is equipped with the air inlet positioned at middle part（41）And it is looped around the second ring-type air-out passage of the air inlet periphery （42）, the second ring-type air-out passage（42）External port in bell mouth shape to periphery tilt.

2. the structure according to claim 1 for preventing air inlet and air outlet short circuit, it is characterized in that：The bracket component （04）With outboard containment side（411）, inner side binding side（412）, the outboard containment side（411）, inner side binding side（412）It Between form the second ring-type air-out passage（42）External port, the outboard containment side（411）Edge be higher than the inner side Binding side（412）Edge.

3. the structure according to claim 1 or 2 for preventing air inlet and air outlet short circuit, it is characterized in that：Second ring Shape air-out passage（42）External port and the air inlet（41）Between keep at a distance.

4. the structure according to claim 1 for preventing air inlet and air outlet short circuit, it is characterized in that：The bracket component （04）Including mask（49）, the air inlet（41）Arranged on the mask（49）On.

5. the structure according to claim 1 for preventing air inlet and air outlet short circuit, it is characterized in that：The bracket component （04）Including the upper inner support fitted together（45）, upper support arm（46）, lower inner support（47）, lower support arm（48）, institute State support arm（46）Around the upper inner support（45）, the lower support arm（48）Around the lower inner support（47）, it is described Upper support arm（46）, lower support arm（48）Form the second ring-type air-out passage（42）External annulus（413）, the upper interior branch Frame（45）, lower inner support（47）Form the second ring-type air-out passage（42）Internal ring wall（414）.