CN102812253B

CN102812253B - Cross flow fan and air conditioner

Info

Publication number: CN102812253B
Application number: CN201080065532.3A
Authority: CN
Inventors: 池田尚史; 田所敬英; 山下哲央; 平川诚司; 代田光宏
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2010-03-18
Filing date: 2010-03-18
Publication date: 2016-08-03
Anticipated expiration: 2030-03-18
Also published as: EP2549114A4; EP2549114B1; ES2690196T3; CN102812253A; EP2549114A1; AU2010348684B2; AU2010348684A1; WO2011114375A1

Abstract

The present invention provides a kind of cross flow fan.Including: impeller monomer (8d), it possesses discoideus support plate (8b) and multiple fin (8c), the centrally located portion of center of rotation of described discoideus support plate (8b), the plurality of fin (8c) configures along the periphery of described support plate (8b), extend along rotary shaft direction, and two ends are supported by described support plate (8b)；Impeller (8a), constitutes impeller (8a) by fixedly mounting multiple described impeller monomers (8d) along described rotary shaft direction；A plurality of concave groove (14), they are located at becomes on the fin suction surface (13a) of rear surface relative to the direction of rotation of described fin (8c), extends along described rotary shaft direction；Described groove (14) is set separated a predetermined distancely, and makes, between adjacent groove (14), there is par (M).

Description

Cross flow fan and air conditioner

Technical field

The present invention relates to the cross flow fan as blower part and the air conditioner being equiped with this cross flow fan.

Background technology

As an example of the cross flow fan being installed in conventional air conditioner, the impeller periphery side periphery in the suction surface side of each fin is had to be provided with the cross flow fan (referring for example to patent documentation 1) of the groove along direction of rotation, dolly dimple or kick.

Prior art literature

Patent documentation

Patent documentation 1: 3 No. 210093 publications of Japanese Unexamined Patent Publication

Summary of the invention

The problem that invention is to be solved

As an example of conventional cross flow fan, the cross flow fan described in patent documentation 1, at the impeller periphery side periphery of the suction surface side of each fin, has the groove along direction of rotation, dolly dimple, kick.Cross flow fan is arranged in the wind path formed by suction inlet and blow-off outlet, in the case of being positioned at blowout side in the fin rotation of formation cross flow fan, by the air-flow of fin along with being peeling near hinder marginal part, this stripping cause the pressure oscillation becoming the reason of noise.To this end, the groove that utilization is located on the suction surface of fin in patent documentation 1, dolly dimple, kick, absorb the pressure oscillation of the reason becoming noise, suppress large-scale noise, thus seek low noise.But, in the case of being positioned at suction side in fin rotation, it is positioned at the situation of blowout side, being overturn by direction of the air-flow on fin relative to fin.Therefore, above-mentioned groove, dolly dimple and kick become exterior region relative to air-flow, the air-flow concentration to sulculus portion causes producing bigger current difference along finned length direction, or resulted in the air-flow along finned length direction by the stripping of air-flow of dolly dimple side, kick, air-flow is made to become unstable, contrary it may happen that pressure oscillation, aggravate large-scale noise.

Additionally, after cross flow fan is attached in air conditioner, because dust makes flowing resistance increase to attachment of the filter being arranged in impeller suction side etc., change relative to the angle of attack of the air-flow of fin and be easily peeled off, there is problems such as making blowout air-flow more unstable.When the cooling operation of air conditioner, if blowing out air-flow instability and being produced from indoor to the adverse current of fan, then cold wind flows into impeller and condenses, and makes dew disperse to outside, consequently, it is possible to ground of getting wet.

It addition, generally, when manufacturing fin, making the thermoplastic resins such as AS flow into the finishing die of fin, cooling tailing edge impeller rotating shaft direction carries out the demoulding and forms the part of fin.But, in order to manufacture be provided with on the suction surface of fin as the structure of patent documentation 1 extend along fin direction of rotation (with the direction of rotating shaft direct cross) groove, dolly dimple, the fin of kick, the demoulding can not be carried out along rotary shaft direction, need to carry out the demoulding along the direction with rotating shaft direct cross, there is manufacture method complicated, the problem that productivity ratio reduces.

The present invention makes to solve problem as described above, it is therefore intended that obtain the cross flow fan being capable of low noise and high efficiency.

It addition, the present invention also aims to obtain the air conditioner that energy is quiet and energy-conservation.

For solving the scheme of problem

The cross flow fan of the present invention is characterised by, including: impeller monomer, it possesses discoideus support plate and multiple fin, the centrally located portion of center of rotation of above-mentioned discoideus support plate, above-mentioned multiple fin configures along the periphery of above-mentioned support plate, extend along rotary shaft direction, and two ends are supported by above-mentioned support plate；Impeller, fixedly mounts multiple above-mentioned impeller monomers along above-mentioned rotary shaft direction and constitutes this impeller；A plurality of concave groove, they are located at becomes on the fin suction surface of rear surface relative to the direction of rotation of above-mentioned fin, extends along above-mentioned rotary shaft direction, arranges above-mentioned groove separated a predetermined distancely, and make have par between adjacent groove.

Additionally, the cross flow fan of the present invention is characterised by, including: impeller monomer, it possesses discoideus support plate and multiple fin, the centrally located portion of center of rotation of above-mentioned discoideus support plate, above-mentioned multiple fin configures along the periphery of above-mentioned support plate, extends along rotary shaft direction, and two ends are supported by above-mentioned support plate；Impeller, fixedly mounts multiple above-mentioned impeller monomers along above-mentioned rotary shaft direction and constitutes this impeller；Motor, the motor reel of this motor is held within the above-mentioned support plate of the end of above-mentioned impeller, drives above-mentioned impeller to rotate；Being fixed on the fixed part of above-mentioned motor reel, it is positioned at the inner side of above-mentioned impeller monomer；Peristome, in order to be able to make fixture insert fixation portions, forms this peristome by the interval local widening of the above-mentioned fin of above-mentioned impeller monomer；The a plurality of concave groove that will extend along above-mentioned rotary shaft direction, be at least located at the fin adjacent with above-mentioned peristome in the direction of rotation side of above-mentioned impeller, become on the fin suction surface of rear surface relative to above-mentioned direction of rotation.

Additionally, the cross flow fan of the present invention is characterised by, including: impeller monomer, it possesses discoideus support plate and multiple fin, the centrally located portion of center of rotation of above-mentioned discoideus support plate, above-mentioned multiple fin configures along the periphery of above-mentioned support plate, extends along rotary shaft direction, and two ends are supported by above-mentioned support plate；Impeller, fixedly mounts multiple above-mentioned impeller monomers along above-mentioned rotary shaft direction and constitutes this impeller；Make the cross sectional shape vertical with rotary shaft of the connecting portion being connected with above-mentioned support plate of the one end of above-mentioned fin, bigger than the cross sectional shape vertical with above-mentioned rotary shaft with the connecting portion that above-mentioned support plate is connected of the other end of above-mentioned fin, and on the fin suction surface becoming rear surface relative to the direction of rotation of above-mentioned fin, it is provided with a plurality of concave groove extended along above-mentioned rotary shaft direction.

It addition, the air conditioner of the present invention is equiped with above-mentioned cross flow fan.

Invention effect

Use the present invention, have and be obtained in that and can peel off in the suction surface lateral inhibition of fin, make steady air current realize the effect of the cross flow fan of low noise and high efficiency.

It addition, by this cross flow fan is installed in air conditioner, it is possible to the air conditioner that acquisition can be quiet and energy-conservation.

Accompanying drawing explanation

Fig. 1 is the stereoscopic figure of the air conditioner representing the cross flow fan being equiped with embodiments of the present invention 1.

Fig. 2 relates to embodiments of the present invention 1, is the Q Q longitudinal section of Fig. 1.

Fig. 3 is the profile diagram of the impeller of the cross flow fan representing embodiments of the present invention 1.

Fig. 4 relates to embodiments of the present invention 1, is the axonometric chart representing the state being fixed with 1 fin in such as 1 ring portion.

Fig. 5 relates to embodiments of the present invention 1, and Fig. 5 is the explanatory diagram in the P P cross section of enlarged representation Fig. 4.

Fig. 6 relates to embodiments of the present invention 1, is the explanatory diagram of the shape representing the groove being located at fin suction surface with the cross section vertical with impeller rotating shaft.

Fig. 7 relates to embodiments of the present invention 1, is the explanatory diagram of the shape representing the groove being located at fin suction surface with the cross section vertical with impeller rotating shaft.

Fig. 8 relates to embodiments of the present invention 1, and Fig. 8 is the explanatory diagram of the flowing representing the air when fin 8c is by impeller inhalation area E1.

Fig. 9 relates to embodiments of the present invention 1, is the explanatory diagram of the flowing representing the air when fin is by impeller blowout region E2.

Figure 10 is the axonometric chart of the impeller of the cross flow fan representing embodiments of the present invention 2.

Figure 11 relates to embodiments of the present invention 2, and (a) of Figure 11 is the axonometric chart of a part for the impeller representing motor side, and (b) of Figure 11 is the explanatory diagram of the side-looking of this impeller.

Figure 12 is the profile diagram of the impeller of the cross flow fan representing embodiments of the present invention 3, and (a) of Figure 12 represents the side view of cross flow fan, and (b) of Figure 12 represents the S S sectional view of (a) of Figure 12.

Figure 13 relates to embodiments of the present invention 3, is the sectional view representing mould 17,18.

Figure 14 relates to embodiments of the present invention 3, is the A A sectional view of in the fin of Figure 12 1.

Figure 15 relates to embodiments of the present invention 3, is the B B sectional view of in the fin of Figure 12 1.

Figure 16 relates to embodiments of the present invention 3, is the axonometric chart of 1 fin representing another structure example according to cross flow fan.

Figure 17 relates to embodiments of the present invention 3, is the sectional view of the part in the cross section vertical with rotary shaft of the leading section, finned length direction of enlarged representation fin.

Figure 18 represents the another structure example of the cross flow fan of embodiments of the present invention 3, is the front view representing 1 fin.

Figure 19 represents the another structure example of the cross flow fan of embodiments of the present invention 3, is the front view representing 1 fin.

Figure 20 represents the another structure example of the cross flow fan of embodiments of the present invention 3, is the front view representing 1 fin.

Figure 21 represents the another structure example of the cross flow fan of embodiments of the present invention 3, is the front view representing 1 fin.

Figure 22 represents the another structure example of the cross flow fan of embodiments of the present invention 3, is the front view representing 1 fin.

Detailed description of the invention

Embodiment 1.

Below, embodiments of the present invention 1 are described with reference to the accompanying drawings.Fig. 1 is the stereoscopic figure of the air conditioner representing the cross flow fan being equiped with present embodiment, and Fig. 2 is the Q Q longitudinal section of Fig. 1.Represent the flowing of air in FIG by hollow arrow, represent the flowing of air in fig. 2 with dotted arrow.

As depicted in figs. 1 and 2, air conditioner main body 1 is arranged on by the wall 11a carrying out the room 11 of air regulation.It is equipped with the suction grid 2 of the suction inlet becoming room air at air conditioner main body top 1a, makes dust static electrification and collected electric dust collector 6 and remove the cancellous filter 5 of dust.Additionally, face side and upper side at impeller 8a are configured with pipe arrangement 7b in the way of surrounding impeller 8a and are applied in the heat exchanger 7 of the structure in multiple aluminium radiator fin 7a.It addition, air conditioner main body front surface 1b is covered by front surface panel, air conditioner main body front surface 1b offers blow-off outlet 3 in downside.Suction side stream E1 for impeller 8a and blowout effluent road E2 are separated by the cross flow fan 8 as pressure fan, and cross flow fan 8 has the regulator (stabilizer) 9 being temporarily stored up by the water droplet dripped from heat exchanger 7, in the blowout side of impeller 8a, there is gyrate guiding wall 10 in order to constitute the back side on blowout effluent road.Additionally, be provided with upper and lower wind direction blade 4a and left and right wind direction blade 4b at blow-off outlet 3 rotatably mountedly, change to indoor air supply direction.In figure, reference O represents the center of rotation of impeller 8a, and E1 is the inhalation area of impeller 8a, and E2 is the blowout region of impeller 8a.It addition, RO represents the direction of rotation of impeller 8a.

In the air conditioner main body 1 constituted in the above described manner, when utilizing power supply board to the motor energising driving impeller 8a to rotate, the impeller 8a of cross flow fan 8 rotates along RO direction.Then, the air in room 11 is sucked from the suction inlet 2 being located at air conditioner main body top 1a, after utilizing electric dust collector 6 and filter 5 to eliminate dust, heat exchanger 7 is utilized to add hot-air and heat, or utilize heat exchanger 7 to cool down air and any one in carrying out freezing, dehumidifying, suck air to the impeller 8a of cross flow fan 8.Subsequently, guide from the directed wall of air-flow 10 of impeller 8a blowout and blow out to room 11 towards blow-off outlet 3, thus carry out air regulation.Now, utilize upper and lower wind direction blade 4a and left and right wind direction blade 4b to control the wind direction of blow out air to upper and lower and left and right directions, so that wind circulates in whole room 11, seek to suppress temperature uneven.

Fig. 3 is the profile diagram of the impeller 8a of the cross flow fan 8 representing present embodiment, (a) of Fig. 3 represents the side view of cross flow fan 8, (b) of Fig. 3 represents the N N sectional view of Fig. 3 (a), the latter half of (b) of Fig. 3 represents the state of the multi-disc fin of visible opposite side, and top half represents 1 fin 8c.As it is shown on figure 3, the impeller 8a of cross flow fan 8 has multiple impeller monomer 8d along rotary shaft direction AX.Impeller monomer 8d is made up of the discoideus support plate in the centrally located portion of center of rotation, the most e.g. ring portion 8b and the periphery configuration along ring portion 8b and the multiple fin 8c along rotary shaft direction AX extension.The two ends of multiple fin 8c are supported in ring portion 8b.Have multiple such as by thermoplastic resin formed impeller monomer 8d such as AS resin, ABS resin along rotary shaft direction AX, the front end such as utilizing ultrasonic bonding etc. to make fin 8c and ring portion 8b of the impeller monomer 8d being adjacent to are connected.It is provided with fan shaft 8f at the center of ring portion 8b of the one end being positioned at rotary shaft direction AX, is provided with fan shaft sleeve 8e at the center of ring portion 8b being positioned at the other end.Further, the motor reel 12a of fan shaft sleeve 8e and motor 12 utilizes screw etc. to fix.Ring portion 8b be profile be the support plate of circular tabular, the ring portion 8b middle body at rotary shaft place rotating axial two ends being positioned at impeller 8a forms fan shaft 8f and fan shaft sleeve 8e, ring portion 8b in addition to those at both ends be the middle body at rotary shaft place be the ring-type of space.In (b) of Fig. 3, chain-dotted line is to link motor reel 12a and fan shaft 8f and represent the imaginary rotation axis of center of rotation O, represents rotary shaft direction.

In the present embodiment, as it is shown on figure 3, at the fin suction surface 13a of fin 8c and between wing periphery side end 15a and fin inner peripheral side end portion 15b, be formed with a plurality of groove 14.Here, the shape of fin is described in detail.The face of the direction of rotation side of fin 8c and the face that is under pressure when rotated are referred to as airfoil pressure face 13b, by the face of the opposition side of airfoil pressure face 13b and when rotated face for negative pressure be referred to as fin suction surface 13a.Fig. 4 is the axonometric chart representing the state being fixed with 1 fin 8c in such as 1 ring portion 8b, and Fig. 5 is the explanatory diagram in the P P cross section of enlarged representation Fig. 4.As shown in Figure 4, the wing periphery side end 15a of fin 8c is positioned at the outer circumferential side of ring portion 8b, and fin inner peripheral side end portion 15b of fin 8c is positioned at the inner circumferential side of ring portion 8b, forms substantially circular shape between wing periphery side end 15a and fin inner peripheral side end portion 15b.On the cross section vertical with rotary shaft of fin 8c, the wall thickness central line of fin 8c when camber line U is to be not provided with groove 14, the link wing periphery side end 15a of fin 8c, the straight line of fin inner peripheral side end portion 15b are regarded as fin string of a musical instrument L, the length of fin string of a musical instrument L is set to L1.

Additionally, as shown in Figure 5, with fin at the wing periphery side end 15a of arc-shaped thickness te1 and fin thickness te2(at fin inner peripheral side end portion 15b not shown) compared with, the thickness te3 of fin middle body on the fin string of a musical instrument L direction of fin 8c is configured to thicker than the thickness te2 of the thickness te1 of fin and fin.I.e., the foil thickness maximum portion 15c becoming maximum thickness tmax is following structure: along the fin string of a musical instrument L direction of fin 8c between wing periphery side end 15a and fin inner peripheral side end portion 15b, from wing periphery side end 15a to foil thickness maximum portion 15c, foil thickness is the most thickening, from foil thickness maximum portion 15c to fin inner peripheral side end portion 15b, foil thickness is the most thinning.

Additionally, be formed with a plurality of groove 14 extended along rotary shaft direction AX, i.e. finned length direction on fin suction surface 13a.The groove sidepiece 14a that the concave groove 14 two ends by trench bottom 14b with trench bottom 14b are connected is constituted.Fig. 6 and Fig. 7 is the explanatory diagram of the shape of the groove 14 being located at fin suction surface 13a with the cross section enlarged representation orthogonal with impeller rotating shaft AX.Groove sidepiece 14a tilts towards fin suction surface 13a from trench bottom 14b in the way of gradually widening groove width.It addition, the neighbouring part that groove sidepiece 14a and fin suction surface 13a is connected implements fillet processing, be formed as the most substantially circular shape.Additionally, the neighbouring part that groove sidepiece 14a and trench bottom 14b is connected implements fillet processing, it is shaped generally as arc-shaped.Here, the groove depth of groove 14 is set to h, groove width is set to g, the par between the adjacent groove 14 of fin suction surface 13a is set to M, the length of this par is set to ML.Dotted line i represents the fin suction surface 13a not formed in the case of groove 14.The imaginary intersection point 14p being set by extending the extension line of fin suction surface 13a and groove sidepiece 14a and obtain, groove width g and smooth minister degree ML are the length between imagination intersection point 14p.

Additionally, as shown in Figure 5 and Figure 6, on the basis of the 13b of airfoil pressure face, dotted line K being set to fin thickness te1 at wing periphery side end 15a or the isopach of fin thickness te2 at fin inner peripheral side end portion 15b, the trench bottom 14b of groove 14 is formed as than isopach K by fin suction surface 13a side.That is, groove 14 is located at than isopach K by the position of fin suction surface 13a side.It addition, the relation of par length ML using groove depth h and par M as groove 14, < mode of par length ML forms groove 14 to meet groove depth h.Additionally, make groove depth hc at the middle body 15c between wing periphery side end 15a and fin inner peripheral side end portion 15b, bigger than groove depth ht near wing periphery side end 15a and groove depth ht near fin inner peripheral side end portion 15b.

Fig. 8 represents the flowing making fin 8c by the air of the fin suction surface 13a and airfoil pressure face 13b of 1 fin 8c during impeller inhalation area E1 on the impeller 8a of this structure on fin 8c with groove 14.Fig. 8 is the explanatory diagram representing fin 8c by the flowing of air during impeller inhalation area E1.

When fin 8c is by impeller inhalation area E1, sucks air and pass through on fin suction surface 13a from wing periphery side end 15a.Here, owing to being provided with groove 14 on fin suction surface 13a, so the inside of groove 14 is negative pressure, as shown in arrow 20 being formed as has the air-flow towards the direction composition within groove 14.Therefore, even if air stream goes along with downstream effluent and to peel off on fin suction surface 13a, also can further air stream by airfoil suction surface 13a.Further, owing at fin inner peripheral side end portion 15b in downstream, airfoil suction surface 13a furthers air-flow, it is possible to reduce the air-flow stripping whirlpool when fin inner peripheral side end portion 15b departs from.

It addition, Fig. 9 is the explanatory diagram of the flowing representing the air on the fin suction surface 13a and airfoil pressure face 13b of 1 fin 8c when fin 8c is by impeller blowout region E2.When fin 8c is by impeller blowout region E2, sucks air and pass through on fin suction surface 13a from fin inner peripheral side end portion 15b.Here, owing to being provided with groove 14 on fin suction surface 13a, so the inside of groove 14 is negative pressure, as shown in arrow 21 being formed as has the air-flow towards the direction composition within groove 14.Therefore, even if air stream goes along with downstream effluent and to peel off on fin suction surface 13a, also can further air stream by airfoil suction surface 13a.Further, owing at the wing periphery side end 15a in downstream, airfoil suction surface 13a furthers air-flow, it is possible to reduce the air-flow stripping whirlpool when wing periphery side end 15a departs from.

So, utilize the groove 14 being located at fin suction surface 13a, all can suppress air stream peeling off as a result, stripping whirlpool when air-flow departs to blowout region E2 from wing periphery side end 15a can be reduced on fin suction surface 13a in inhalation area E1 and blowout region E2.

Further, since groove 14 is formed as extending along rotary shaft direction (finned length direction), even if so to produce wind speed at the air-flow that passes through along finned length direction poor, the effect that furthers produced by groove 14 also can be obtained.Therefore, the stripping of air-flow can be suppressed on the whole.

Additionally, due to can suppress to peel off, so the effective area of stream expands between fin, the driving moment of motor also can reduce.Thus, it is thus achieved that high efficiency cross flow fan.

It addition, on the cross section vertical with rotary shaft, arrange with being formed at the interval ML of a plurality of groove 14 separately regulation of the fin suction surface 13a of cross flow fan, and between adjacent groove 14, there is par M.In the case of being formed continuously groove 14 along fin string of a musical instrument L direction without compartment of terrain, producing negative pressure even with groove 14, air-flow can not be attached on fin suction surface 13a again, causes instability.That is, utilize the air stream that the effect that furthers produced by groove 14 flows along fin suction surface 13a after having crossed groove 14, it is desirable to be again attached on the fin suction surface 13a that is connected with groove 14.To this end, by being configured to the par M between adjacent groove 14 with length ML, it is possible to obtain length when again adhering to fully such that it is able to make steady air current ground again adhere to.So, after the effect that furthers produced by groove 14, be the most again attached on suction surface, further effect again ..., so that air-flow all-the-time stable.Particularly, have and can play the effect of the effect that furthers produced by groove 14 fully.As a result, cross flow fan is capable of low noise and high efficiency, moreover it is possible to prevent from for the change of flowing resistance peeling off, and prevents the adverse current to fan caused by the blowout instability of air-flow.

It addition, on the cross section vertical with rotary shaft, the connecting portion that the groove sidepiece 14a and fin suction surface 13a of a plurality of groove 14 being formed at fin suction surface 13a are connected is formed as the most substantially circular shape with having rounded shapes.Therefore, when air-flow is furthered by groove 14 and flows to the fin suction surface 13a in downstream, it is possible to prevent airflow strikes corner and the pressure oscillation that produces.Can low noise and the cross flow fan of high efficiency further thus, it is possible to obtain.It addition, 2 corners of connection 2 groove sidepiece 14a and fin suction surface 13a of 1 groove 14 are all formed as substantially circular shape.Thus, even if fin 8c makes the direction of air-flow in inhalation area E1 and blowout region E2 upset, the most all can suppress to peel off in region E1, E2.

It addition, on the cross section vertical with rotary shaft, trench bottom 14b is formed as the shape with fillet, and will be formed towards, with trench bottom 14b continuous print groove sidepiece 14a, the shape that fin suction surface 13a broadens.Trench bottom 14b e.g. arc-shaped, so the air-flow of the inside of groove can smoothly circulate, is stable.Additionally, groove sidepiece 14a is by have inclination by the way of broadening towards fin suction surface 13a, it is possible to effectively guide air-flow to obtain the effect that furthers in groove 14.Can low noise and the cross flow fan of high efficiency further thus, it is possible to obtain.

It addition, the trench bottom 14b of groove 14 is formed as than isopach K by fin suction surface 13a side.The such as foil thickness near by wing periphery end 15a or near fin inner peripheral end thereof 15b is set to about 0.5mm, and in the case of the foil thickness at fin central part 15c is set to about 1.5mm, isopach K is about 0.5mm away from airfoil pressure face 13b.Owing to forming groove 14, so groove depth hc at fin central part 15c is configured to below 1.0mm in the position depending on fin suction surface 13a than this fin isopach K.Such as groove depth h is set to about 0.25mm, near the 15a of wing periphery end or near fin inner peripheral end thereof 15b, the fin suction surface 13a of the foil thickness part bigger than about 0.75mm arranges groove 14.By being formed as said structure, it is possible to obtain the effect that furthers produced by groove 14, even and if define groove 14, also ensure that the thickness of fin 8c, improve intensity.

It addition, meet < the par length ML landform grooving 14 of groove depth h.That is, it is formed at a plurality of groove 14 of fin suction surface 13a of cross flow fan on the cross section vertical with rotary shaft, is formed as the interval ML of at least separately regulation along fin string of a musical instrument direction.Foregoing describe the action effect produced by par M, by making par length ML bigger than groove depth h, par M can be utilized to be reliably achieved air-flow attachment again after crossing groove 14, the effect that repeatedly furthers and again adhering to, so that air-flow will not peel off ground all-the-time stable from fin suction surface 13a.Therefore, it is thus achieved that be capable of the cross flow fan of low noise and high efficiency.

Although it addition, be formed as being provided with the structure of groove 14 on the whole surface from the fin suction surface 13a of wing periphery side end 15a to fin inner peripheral side end portion 15b, but the present invention is not limited to this.Near at least one party end of wing periphery side end 15a and fin inner peripheral side end portion 15b, groove 14 is set.Such as can also be for following this structure: several, such as 2 grooves 14 are set near wing periphery side end 15a, and several, such as 2 grooves 14 are set near fin inner peripheral side end portion 15b.Alternatively, it is also possible to only arrange several, such as 2 grooves 14 near wing periphery side end 15a, can also be that only several, that structure of such as 2 grooves 14 are set near fin inner peripheral side end portion 15b on the contrary.By at least becoming the wing periphery side 15a of upstream side in inhalation area E1 and becoming the fin inner circumferential side 15b of upstream side at blowout region E2 and arrange groove 14, it is possible to effectively utilize groove 14 and reduce the stripping of air stream.

Utilizing the structure of the device being equiped with cross flow fan 8, at air-flow in the case of inhalation area E1 is easily peeled off, it is effective for arranging groove 14 near the wing periphery side end 15a of the upstream side becoming air-flow in inhalation area E1.It addition, at air-flow in the case of blowout region E2 is easily peeled off, it is effective for arranging groove 14 near fin inner peripheral side end portion 15b blowing out the upstream side that region E2 becomes air-flow.

But, as shown in Figure 8 and Figure 9, if on the cross section vertical with rotary shaft, at fin suction surface 13a, groove 14 is set from wing periphery side end 15a to the whole surface of fin inner peripheral side end portion 15b, the most no matter air-flow is intended in which position of fin suction surface 13a peel off, the generation of this stripping can be prevented, so so arranging more efficient.

More than it addition, the groove 14 extended along rotary shaft direction of the fin suction surface 13a of fin 8c is formed as the longer groove 14 from the one end of fin 8c to the other end, but groove 14 can also be arranged on a part.As long as at least any portion of middle body, one end and the other end such as in finned length direction arranges groove 14, effect just can be played.It addition, a plurality of groove 14 may not be identical length.It addition, a plurality of groove 14 can also be irregularly arranged.That is, on the finned length direction of fin 8c, the starting position of groove 14 and end position can change variedly according to a plurality of groove 14.

It addition, groove depth h, par length ML and groove width g can also be different in 1 groove 14.Such as can also make the groove width g one end in finned length direction relatively greatly and in the other end smaller, gradually or phasic Chang.

By forming the most the same groove 14 along finned length direction, and non-formation all the same groove 14, thus, the cross section vertical with rotary shaft changes because of the position in finned length direction.That is, in the case of air-flow skew flows into fin suction surface 13a, the quantity of groove 14 changes on the direction of fin string of a musical instrument L.Even if air-flow wants to occur small stripping along finned length direction, also can be spread by the airflow influence in neighbouring finned length direction.Then, wind speed profile homogenization is made.Thus, noise is reduced.

Additionally, as shown in Figure 5, on fin string of a musical instrument L direction, groove depth hc near fin string central part between wing periphery end 15a and fin inner peripheral side end portion 15b of fin 8c is formed as bigger than groove depth ht of 15a side, above-mentioned wing periphery end and fin inner peripheral side end portion 15b side.Therefore, it is possible to obtain the effect that furthers produced by groove 14, and the foil thickness of fin 8c will not become very thin, it becomes possible to prevent the liquation periphery when shaping from deteriorating, when assembling, intensity is not enough, improves productivity ratio.

About the shape of fin 8c, in the case of the foil thickness substantially uniform thickness between airfoil pressure face 13a and fin suction surface 13b, from fin inner peripheral side end portion 15b to wing periphery side end 15a, stream gradually constriction.In this case, especially air stream in inhalation area from outer circumferential side to inner circumferential side inflow time, distance between the fin of inner circumferential side expands, and air-flow becomes unstable, but by arranging groove 14, it is possible to utilize the stripping of the effect suppression air-flow that furthers.In contrast, in the case of that airfoil shown in Fig. 5, compared with the 13b of airfoil pressure face, the arc radius of the flap surface of fin suction surface 13a is little, and curvature is big.That is, the foil thickness at the middle body 15c in fin string of a musical instrument L direction is bigger than fin thickness at periphery side end 15a, 15b in fin.In the case of this shape, observe the stream distance between adjacent fin 8c, less from the change of fin inner peripheral side end portion 15b to wing periphery side end 15a, it is easy to make air-flow stable during by fin.Therefore, by arranging that groove 14 of present embodiment further at fin suction surface 13a, it is possible to suppress the development of small boundary region, make the air stream between fin become air-flow smoothly, prevent the stream between fin because of turbulent flow constriction.

It addition, in the present embodiment, along the finned length direction a plurality of groove of spread configuration substantially in parallel 14, and form a plurality of groove 14 along finned length direction substantially in parallel with wing periphery side end 15a and fin inner peripheral side end portion 15b.As long as being formed with a plurality of groove 14 on the cross section vertical with rotary shaft, just can play the effect that furthers, even if so being slightly inclined along finned length direction relative to wing periphery side end 15a, fin inner peripheral side end portion 15b, same effect also can be played.The a plurality of groove 14 of such as spread configuration can also advance along the direction of rotation of impeller 8a or formed relative to the torsion of rotating shaft with retreating.

As mentioned above, the cross flow fan of present embodiment is characterised by, including: impeller monomer, it possesses discoideus support plate 8b and multiple fin 8c, the centrally located portion of center of rotation of above-mentioned support plate 8b, above-mentioned multiple fin 8c configures along the periphery of support plate 8b, extends along rotary shaft direction, and two ends are supported by plate 8b supporting；Impeller 8a, constitutes this impeller 8a by fixedly mounting multiple above-mentioned impeller monomer 8d along above-mentioned rotary shaft direction；A plurality of concave groove 14, they are located at the fin suction surface 13a that direction of rotation is rear surface relative to above-mentioned fin 8c, and these grooves 14 extend along above-mentioned rotary shaft direction；Separately specify is positioned apart from above-mentioned groove 14, and between adjacent groove 14, there is par M, thus by utilizing groove 14 to produce negative pressure, can further air stream by airfoil suction surface 13a, make the air-flow having crossed groove 14 be again attached to fin suction surface 13a and be difficult to peel off from fin suction surface 13a.Further, it is possible to the suppression development of boundary region in the suction surface side of fin and stripping, promote the effective area of the stream between fin to expand, reduce the driving moment of motor.Therefore, it is thus achieved that the cross flow fan of low noise and high efficiency can be realized.

Additionally, this cross flow fan 8 is being arranged between suction side stream E1 and blowout effluent road E2, in the way of surrounding impeller 8a, heat exchanger 7 is arranged in the stream E1 of suction side, heat exchanger 7 is utilized to carry out heat exchange with the suction air sent by cross flow fan 8, this suction air is blown out to through blowout effluent road E2 in the air conditioner of indoor, by the cross flow fan 8 described in installing present embodiment, it is possible to obtain quiet and energy-conservation air conditioner.In addition, even if increasing in upstream side flowing resistance, air-flow is not easy to peel off, and stripping whirlpool when groove 14 can also be utilized to reduce flow shedding fin 8c, blow out stable air-flow, it is possible to prevent when the cooling operation of air conditioner from indoor to the adverse current of cross flow fan 8, thus prevent impeller 8a condensation and to outside drain dew.

Embodiment 2.

Figure 10 is the axonometric chart of the impeller 8a of the cross flow fan representing embodiments of the present invention 2, Figure 11 is the figure of the part of the motor side of the impeller representing cross flow fan, (a) of Figure 11 is the axonometric chart of the part of the impeller 8a representing motor side, and (b) of Figure 11 is the explanatory diagram of the side-looking of this impeller 8a.(b) of Figure 11 represents the side of ring portion 8b near motor in the way of partial cutaway, and the part cut away represents fin 8c together with ring portion 8b adjacent thereto.In the various figures, identical with embodiment 1 reference represents the part same or equivalent with embodiment 1.

On impeller 8a in the present embodiment, it is fixed on the structure that private side that the fan shaft sleeve 8e of motor reel 12a is impeller monomer 8d to the end being positioned at impeller 8a is prominent.As shown in Figure 10, the impeller 8a of cross flow fan 8 has multiple impeller monomer 8d along rotary shaft direction AX.Impeller monomer 8d includes discoideus support plate and multiple fin 8c, the centrally located portion of center of rotation of above-mentioned support plate, the most e.g. ring portion 8b, and above-mentioned multiple fin 8c configure along the periphery of ring portion 8b, extend along rotary shaft direction, and two ends are supported by ring portion 8b.Impeller monomer 8d is such as formed by AS resin, ABS resin etc. are thermoplastic resin formed, such as utilize ultrasonic bonding etc. multiple along rotary shaft direction AX fixed installation, be that 5 impeller monomer 8d form impeller 8a here.Further, it is provided with fan shaft sleeve 8e at the center of ring portion 8b of the end of motor side, motor reel 12a(Fig. 3 of fan shaft sleeve 8e and motor 12 represents) fixing by such as screw etc. at fixed part 16.By in fixed part 16 fixed motor axle 12a and the rotary shaft of impeller 8a, utilize the rotation of motor 12 to drive impeller 8a to rotate.

In the present embodiment, the fan shaft sleeve 8e of fixing impeller 8a and motor 12 is prominent to impeller internal, and the fixed part being fixed on motor reel 12a is formed as being positioned at the inner side of impeller monomer 8da.By being formed as said structure, it is possible to maintain the width of air conditioner unchangeably, the total length of impeller 8a is made to increase the length of fan shaft sleeve 8e, it is possible to improve Diffusion performance.For following structure on the impeller monomer 8da of the end being positioned at motor 12 side constituted in the above described manner: can insert for fixture during for fan attachment axle sleeve 8e and motor reel 12a at screwed hole 16, local has peristome C with being not provided with fin 8c.This peristome is represented in the circle C of Figure 11.Such as on another impeller monomer 8d, fin 8c is being arranged with 360 degree equably as around the rotary shaft of axle, but on impeller monomer 8da, the fin 8c of the part facing with screwed hole 16 pulls out regulation sheet number, is 1 the most here and is not provided with, it is possible to see screwed hole 16 from peristome C.

In the present embodiment, lack a part at the fin of impeller monomer 8da and in the case of there is the impeller 8a of the structure of peristome C, at least on the fin suction surface 13a of fin 8ca being positioned at the position advanced than this peristome C along direction of rotation, be provided with the groove 14 shown in embodiment 1.

It is bigger than the interval between other fins at the interval of fin 8ca adjacent for peristome C and fin 8cb, so compared with the air of circulation in the stream formed between other fins, more air flows into this interval and is easily peeled off.When air-flow is peeled off in the wide stream that peristome C-shaped becomes, send this abnormal noise smacked one's lips.In contrast, in the present embodiment, at least space C fin 8c direction of rotation downstream control 1 fin 8ca fin suction surface 13a on, be formed with a plurality of groove 14 that the length direction along fin 8c extends.In embodiment 1 it is stated that, as shown in Figure 8 and Figure 9, utilize groove 14 to further air-flow and suppress the stripping of air-flow, so compared with the situation not forming groove 14, it is possible to reduce the noise produced by stripping, it is thus achieved that quietly cross flow fan.

The structure of groove 14 is identical with embodiment 1.When, at least on the fin suction surface 13a of the fin 8ca of the position being positioned at along direction of rotation than peristome C advance, when arranging the groove 14 shown in embodiment 1, the air stream of flowing between these fins being had effect.Additionally, by also arranging groove 14 on the fin suction surface 13a of other fins 8c, it is possible to make the stripping between impeller entirety suppression fin further.Owing to the stripping of air-flow can be suppressed, it is possible to expand the effective area of stream between fin, reduce the driving moment of motor.

Additionally, when not only arranging groove 14 on the fin suction surface 13a of the fin 8ca of the position being positioned at along direction of rotation than peristome C advance, and as shown in the D of region, when also groove 14 being set on the multi-disc fin 8c of the part of the position being positioned at along direction of rotation than peristome C advance, can be the most effective.It addition, when arranging groove 14 on the fin suction surface 13a at the multi-disc fin 8c including the fin 8cb leaning on direction of rotation opposition side than peristome C, can be the most effective.

It addition, be formed as in fig. 11 to be able to insert fixed part 16 for fixture, and 1 fin 8c is set less, but the present invention is not limited to this.The most also not at equal intervals but to arrange multiple fin 8c with unequal-interval on impeller monomer 8d.In this case, when being configured to the wide part of fixed part 16 and interval and being facing, it is possible to fixture is inserted fixed part 16.So, even if in the case of forming the peristome C of the interval local wide making fin 8c to be able to insert fixed part 16 for fixture, as long as at least on the direction of rotation RO side of the impeller 8a fin 8c adjacent with peristome C, the fin suction surface 13a that becomes rear surface relative to direction of rotation RO, arranging a plurality of concave groove 14 extended along rotary shaft direction AX.

As mentioned above, by making cross flow fan include: impeller monomer 8d, it possesses discoideus support plate 8b and multiple fin 8c, the centrally located portion of center of rotation of above-mentioned support plate 8b, above-mentioned multiple fin 8c configures along the periphery of support plate 8b, extend along rotary shaft direction AX, and two ends are supported by plate 8b supporting；Impeller 8a, constitutes this impeller 8a by fixedly mounting multiple impeller monomer 8d along rotary shaft direction AX；Motor 12, the motor reel 12a of this motor 12 is held within the support plate 8b of the end of impeller 8a, and this motor 12 drives impeller 8a to rotate；Being fixed on the fixed part 16 of motor reel 12a, it is positioned at the inner side of impeller monomer 8d；Peristome C, in order to be able to insert the interval local wide of fixed part 16 and fin 8c by impeller monomer 8d for fixture, constitutes this peristome C；At least on the direction of rotation RO side of the impeller 8a fin 8ca adjacent with peristome C, the fin suction surface 13a that becomes rear surface relative to direction of rotation RO, the a plurality of concave groove 14 extended along rotary shaft direction AX is set such that it is able to suppression air-flow is peeled off from fin suction surface 13a.Therefore, it is possible to obtain stable air-flow, reduce noise.

It addition, as tdescribed in embodiment 1, it is also possible to have the mode of par M between particularly adjacent on the vertical cross section of rotary shaft groove, separately regulation is positioned apart from groove 14.By being formed as said structure, it can be seen that fixed part 16, so easily manufacturing.And, even if the part between fin arranges peristome C, also can utilize by groove 14 produce further effect and the adhesion effect again produced by par M makes steady air current, thus reduce noise, it is thus achieved that high efficiency cross flow fan.

It addition, by installing cross flow fan, it is possible to obtain the most ear-piercing peace and quiet and the air conditioner of high-quality.

Here, describe the reason of the fixed part due to assembling procedure and suppress the structure peeled off with considering the air-flow of the part that the interval of adjacent fin expands.But the present invention is not limited to this, in the case of the part that the interval constituting adjacent fin because of other reasons expands, also it is on the fin suction surface 13a of fin 8c of the direction of rotation side of at least wide at interval part, a plurality of groove 14 extended along rotary shaft direction AX is set.

Embodiment 3.

Below, embodiments of the present invention 3 are described with reference to the accompanying drawings.Figure 12 is the profile diagram of the impeller 8a of the cross flow fan 8 representing present embodiment, (a) of Figure 12 represents the side view of cross flow fan 8, (b) of Figure 12 represents the S S sectional view of (a) of Figure 12, the latter half of (b) of Figure 12 represents the state of the multi-disc fin of visible opposite side on each impeller monomer 8d, and top half represents 1 fin 8c.In the drawings, identical with embodiment 1 and embodiment 2 reference represents and the same or equivalent part of embodiment 1,2.In (b) of Figure 12, chain-dotted line is also to link motor reel 12a and fan shaft 8f and represent the imaginary rotation axis of center of rotation O.As shown in figure 12, the impeller 8a of cross flow fan 8 has multiple impeller monomer 8d along rotary shaft direction AX.Impeller monomer 8d includes: discoideus support plate, the most for example, ring portion 8b, the centrally located portion of its center of rotation；Multiple fin 8c, they configure along the periphery of ring portion 8b, extend along rotary shaft direction, and two ends are supported by ring portion 8b.Fin 8c in present embodiment, impeller monomer 8d is formed as the airfoil root (towards right side in (b) of Figure 12) at the connecting portion being connected with ring portion 8b as at one end portion, the shape in the cross section vertical with rotary shaft is maximum, and cross sectional shape is gradually reduced afterwards.Further, be formed as in the other end of fin 8c in the leading section, finned length direction (towards left side in (b) of Figure 12) as the connecting portion being fixedly installed in adjacent impeller monomer 8d, that pointed shape that the cross sectional shape vertical with rotary shaft is minimum.I.e., on the cross section vertical with rotary shaft, be formed as making the foil thickness of the fin 8c formed by fin suction surface 13a and airfoil pressure face 13b and the fin chord length L1 of the length as the straight line linking wing periphery side end 15a and fin inner peripheral side end portion 15b, the shape reduced from airfoil root airfoil length direction leading section.Therefore, on the cross section shown in (b) of Figure 12, wing periphery side end 15a and fin inner peripheral side end portion 15b are all formed as the shape tilted from the inner side of airfoil root airfoil length direction leading section airfoil 8c.In the present embodiment, also become on the fin suction surface 13a of rear surface in the direction of rotation relative to fin 8c, a plurality of concave groove 14 extended along rotary shaft direction AX is set.

In manufacturing process, the thermoplastic resins such as such as AS resin, ABS resin are utilized to carry out ester moulding and form impeller monomer 8d.Being fixed between 2 ring portions 8b by multiple fin 8c on impeller 8a, side's ring portion 8b is integrally formed with ring portion 8b of such as motor side and constitutes impeller monomer 8d.Figure 13 represents the state of the demoulding of this ester moulding.Figure 13 is the sectional view representing mould 17,18, represents the state of 1 fin 8c of being respectively formed with, but actually inner side spread configuration in the form of a ring in the periphery of ring portion 8b is formed with multiple fin 8c.When carrying out ester moulding, make the mould 17,18 of the form with concave-convex mold and the mating shapes of multiple fin 8c, with high-pressure injection moulding resin in these moulds, move mould 18 after cooling in the direction of the arrow, thus obtain by the impeller monomer 8d of resin formation.

In the case of carrying out the demoulding along rotary shaft direction AX as shown in this arrow, need by impeller monomer 8d be shaped so as to can be along the shape of the rotary shaft direction AX demoulding.To this end, fin 8c is configured to as the airfoil root 8c1 with the part of ring portion 8b continuous print fin 8c on impeller monomer 8d, cross sectional shape is maximum, and at finned length direction leading section 8c2, cross sectional shape is less.By being formed as the cross sectional shape of this fin 8c, it is possible to successfully carry out demoulding during ester moulding.Here, such as from the airfoil root 8c1 airfoil length direction leading section 8c2 of fin 8c, the cross sectional shape of fin is made to be gradually reduced and be formed as the fin 8c of pointed shape.Wing periphery side end 15a and fin inner peripheral side end portion 15b are formed as the shape tilted in the way of having the angle of such as several years degree in the inner side of fin 8c.Therefore, when carrying out the demoulding, it is possible to when somewhat moving mould 18, between mould 18 and the impeller monomer 8d shaped, space is formed, at whole fin 8c separately, it is possible to easily and successfully carry out the demoulding.

And, when being positioned in ring portion 8b of adjacent position utilizing the methods such as such as ultrasonic bonding to be fixedly mounted on by the finned length direction leading section 8c2 of the impeller monomer 8d of the pointed shape of ester moulding, fix impeller monomer 8d along rotary shaft direction AX and form impeller 8a each other.

In the present embodiment, on the fin suction surface 13a of fin 8c, the groove 14 as embodiment 1 also it is provided with.That is, the fin suction surface 13a of fin 8c is provided with a plurality of edge concave groove 14 as the finned length direction extension of rotary shaft direction AX.On the cross section vertical with rotary shaft, it is arranged in a plurality of groove 14 between wing periphery side end 15a and fin inner peripheral side end portion 15b the most equably, there is trench bottom 14b and 2 relative groove sidepiece 14a, by trench bottom 14b be shaped so as to there is the structure of fillet, here for substantially circular shape.Being formed as, with trench bottom 14b continuous print groove sidepiece 14a, the shape that airfoil suction surface 13a broadens, the connecting portion that groove sidepiece 14a is connected with fin suction surface 13 is again formed as the shape with fillet.The groove 14 extended along rotary shaft direction AX is to have concavo-convex along the circumference of impeller 8a and do not have irregular shape along rotary shaft direction AX.Therefore, it is the shape being suitable for utilizing the ester moulding mode along the AX demoulding of rotary shaft direction shown in Figure 13 to shape impeller monomer 8d.

It follows that further describe the shape of fin.Figure 14 is the A A sectional view of 1 in the fin of Figure 12, represents the cross section of the finned length direction leading section 8c2 of fin 8c.It addition, Figure 15 is the B B sectional view of 1 in the fin of Figure 12, represent the cross section of the airfoil root 8c1 of fin 8c.As shown in Figure 14 and Figure 15, on the cross section vertical with rotary shaft of cross flow fan, on arbitrary cross section, the shape of fin 8c is the most identical, and size aspect is maximum at airfoil root 8c1, minimum at finned length direction leading section 8c2.

In representing the Figure 14 in cross section of finned length direction leading section 8c2, fin chord length is set to L12, groove depth is set to h2, groove width is set to g2, the maximum thickness of the foil thickness of the inscribe diameter of a circle of airfoil pressure face 13b and fin suction surface 13a as fin 8c is set to tmax2.Equally, in representing the Figure 15 in cross section of airfoil root 8c1, fin chord length is set to L11, groove depth is set to h1, groove width is set to g1, maximum thickness is set to tmax1.Here, groove width g is identical with the definition shown in Fig. 7 of embodiment 1 with the definition of groove depth h.In the case of the fin 8c of present embodiment, tmax1 > tmax2 and L11 > L12, this fin 8c are the pointed shape making fin chord length L1 and maximum thickness tmax smoothly reduce to finned length direction leading section 8c2 from airfoil root 8c1.About groove 14, in the structure example shown in Figure 12, make h1=h2 and make g1=g2, fin suction surface 13a arranges the groove 14 of a plurality of same shape.

As embodiment 1, when fin 8c is by inhalation area E1, sucks air and pass through on fin suction surface 13a from wing periphery side end 15a.Here, owing to being formed with a plurality of groove 14 extended along finned length direction on fin suction surface 13a, become as shown in Figure 8 so sucking air by air stream during fin suction surface 13a.That is, the inside of groove 14 is negative pressure and as shown in arrow 20 becomes the air-flow having towards the direction composition within groove 14.Therefore, even if air-flow starts to peel off at wing periphery side end 15a, also can further air-flow by airfoil suction surface 13a, fin inner peripheral side end portion 15b in downstream also can further air-flow by airfoil suction surface 13a, it is possible to reduce the air-flow stripping whirlpool when fin inner peripheral side end portion 15b departs from.

It addition, as it is shown in figure 9, when fin 8c is by blowout region E2, sucks air and pass through on fin suction surface 13a from fin inner peripheral side end portion 15b.Here, owing to being provided with groove 14 on fin suction surface 13a, so the inside of groove 14 is negative pressure and as shown in arrow 21 becomes the air-flow having towards the direction composition within groove 14.Therefore, even if air-flow goes along with downstream effluent and to peel off on fin suction surface 13a, also can further air stream by airfoil suction surface 13a.Further, the wing periphery side end 15a in downstream also can further air-flow by airfoil suction surface 13a, so the air-flow stripping whirlpool when wing periphery side end 15a departs from can be reduced.

So, utilizing the groove 14 being located at fin suction surface 13a, all can suppress the stripping of the air stream on fin suction surface 13a in inhalation area E1 and blowout region E2, result can reduce air-flow from wing periphery side end 15a to the stripping whirlpool blown out when region E2 departs from.

Further, since groove 14 is formed as extending along rotary shaft direction AX, even if so the wind speed produced on finned length direction is poor, the effect that furthers produced by groove 14 also can be obtained.Therefore, the stripping of air-flow can be suppressed on the whole.

Additionally, due to the stripping of air-flow can be suppressed, so the effective area of stream expands between fin, the driving moment of motor also can reduce.Thus, it is thus achieved that high efficiency cross flow fan.

It addition, as the Fig. 7 in embodiment 1, be formed at cross flow fan fin suction surface 13a a plurality of groove 14 and the vertical cross section of rotary shaft on arrange in the way of separating the interval ML of regulation, and between adjacent groove 14, there is par M.So, by being configured to the par M between adjacent groove 14 with length ML, it is possible to obtain length when again adhering to fully such that it is able to make steady air current ground again adhere to.After the effect that furthers produced by groove 14, be repeated again be attached on suction surface 13a, further effect again ..., thus air-flow is stable all the time.Particularly, have and can effectively play the effect of the effect that furthers produced by groove 14.As a result, cross flow fan is capable of low noise and high efficiency, moreover it is possible to prevent from for the change of flowing resistance peeling off, and prevents the adverse current to fan caused by the blowout instability of air-flow.

It addition, as embodiment 1, on the cross section vertical with rotary shaft, the connecting portion that the groove sidepiece 14a and fin suction surface 13a of a plurality of groove 14 being formed at fin suction surface 13a are connected is formed as the most substantially circular shape with having rounded shapes.Therefore, air-flow furthered by groove 14 and during the fin suction surface 13a flowing of downstream side, it is possible to prevent airflow strikes corner and the pressure oscillation that produces.Can low noise and the cross flow fan of high efficiency further thus, it is possible to obtain.It addition, 2 corners of connection 2 groove sidepiece 14a and fin suction surface 13a of 1 groove 14 are all formed as substantially circular shape.Thus, even if fin 8c makes the direction of air-flow in inhalation area E1 and blowout region E2 upset, the stripping of air-flow can the most all be suppressed in region E1, E2.

It addition, as embodiment 1, on the cross section vertical with rotary shaft, trench bottom 14b is formed as the shape with fillet, and will be formed towards, with trench bottom 14b continuous print groove sidepiece 14a, the shape that fin suction surface 13a broadens.Trench bottom 14b e.g. arc-shaped, so the air-flow of the inside of groove can smoothly circulate, is stable.Additionally, groove sidepiece 14a is by have inclination by the way of broadening towards fin suction surface 13a, it is possible to effectively guide air-flow to obtain the effect that furthers in groove 14.Can low noise and the cross flow fan of high efficiency further thus, it is possible to obtain.

It addition, as embodiment 1, the trench bottom 14b of groove 14 is formed as than isopach K by fin suction surface 13a side.By being formed as said structure, it is possible to obtain the effect that furthers produced by groove 14, even and if define groove 14, also ensure that the thickness of fin 8c, improve intensity.

It addition, as embodiment 1, on all cross sections vertical with rotary shaft direction, from airfoil root 8c1 to finned length direction leading section 8c2, meet < the par length ML landform grooving 14 of groove depth h.By making par length ML bigger than groove depth h, it is possible to utilize par M to be reliably achieved air-flow attachment again after crossing groove 14, the effect that repeatedly furthers and again adhering to, so that air-flow will not peel off ground all-the-time stable from fin suction surface 13a.Therefore, it is thus achieved that be capable of the cross flow fan of low noise and high efficiency.

In such manner, it is possible to obtain utilizable energy, easily and the cross flow fan of the structure that successfully carries out the demoulding realizes low noise and high efficiency, makes productivity ratio preferable by installing this cross flow fan, quiet and energy-conservation air conditioner.

Figure 16 is the axonometric chart of 1 fin 8c of another structure example representing the cross flow fan according to present embodiment.In this configuration, make groove width g of groove 14 or groove depth h differ along finned length direction, change at airfoil root 8c1 and finned length direction leading section 8c2.It addition, the part in the cross section vertical with rotary shaft at the finned length direction leading section 8c2 of enlarged representation fin 8c in fig. 17.I.e. identical with the A A cross section of Figure 12.Here, about groove width g1 of groove 14 of airfoil root 8c1, groove depth h1, groove width g2 of groove 14 of finned length direction leading section 8c2 and groove depth h2, make g1 < g2 and make h1 < h2.Fin 8c is shaped so as to from the airfoil root 8c1 of ring portion 8b side to being the finned length direction leading section 8c2 of free end before fixed installation, foil thickness and the diminishing pointed shape of fin chord length L1.It is gradually increased additionally, the concave groove 14 being located at fin suction surface 13a is formed as groove width g and groove depth h from airfoil root 8c1 airfoil length direction leading section 8c2.

Therefore, in addition to can utilizing the stripping of the effect suppression air-flow that furthers produced by groove 14, moreover it is possible to when air-flow crosses groove 14, the effect that makes to further smoothly changes along finned length direction (rotary shaft direction).When discharging air-flow from fin 8c, flow velocity and wind direction smoothly change along finned length direction, thus particularly in blowout region E2, the flow velocity contacted with guiding wall 10 and Angulation changes.So, blowout air-flow will not arrive guiding wall 10 simultaneously, so pressure oscillation decay, it is possible to realize low noise further.

In addition, utilize as Figure 13 along fin rotary shaft direction AX carry out mould 17,18 the demoulding manufacturing process manufacture time, wing periphery side end 15a and fin inner peripheral side end portion 15b tilt a little along stripping direction, and the whole recess constituting groove 14 tilts a little along stripping direction.Therefore, when carrying out ester moulding, it is easy to the whole fin 8c demoulding of groove 14 will be comprised.

As a result, cross flow fan is able to maintain that productivity ratio, and can realize low noise and high efficiency further.Additionally, for the change of flowing resistance, it is possible to the stripping of suppression air-flow, it is achieved stable blowout air-flow, it is possible to seek cross flow fan low noise and high efficiency.

Additionally, fin 8c is formed as from the root 8c1 of ring portion 8b side to the finned length direction leading section 8c2 of the opposing party being free end before fixed installation along the length direction of impeller monomer 8d, foil thickness and the diminishing pointed shape of fin chord length L1, the cross sectional shape vertical with rotary shaft direction is formed as being gradually reduced, but the present invention is not limited to this.The cross sectional shape ground that such as can also replace making fin 8c tilt and gradually change fin 8c, makes the cross sectional shape phasic Chang of fin 8c.Use the structure of the cross sectional shape phasic Chang making fin 8c, as the shape smoothly varying with the cross sectional shape making fin 8c, also can be when the demoulding when somewhat moving mould 18, space is formed between mould 18 and the impeller monomer 8d shaped, whole impeller monomer 8d is separated with mould 18, it is possible to easily and the successfully demoulding.

It addition, be formed at groove width g of the groove 14 of fin suction surface 13a and groove depth h can not also be all formed as being gradually increased from fin root 8c1 lateral wings leaf length direction leading section 8c2.Gradually or interim increase i.e., it is possible to be formed as at least one party of groove width g of groove 14 and groove depth h.As long as being formed as gradually along finned length direction to either one of major general's groove width g and groove depth h or stage increasing.In the case of concavity is with the groove 14 of phasic Chang, when air-flow crosses groove 14, the effect that furthers changes along finned length direction, and when discharging air-flow from fin 8c, flow velocity, wind direction also change along finned length direction.Thus, particularly when blowing out air-flow and contacting with guiding wall 10 in impeller blowout region E2, the blowout flow velocity of air-flow, angle change, from making pressure oscillation decay without arriving guiding wall 10 ground simultaneously, there is the effect of further low noise.

In addition, the fin string of a musical instrument L direction at Figure 17 can also be formed as, with the wing periphery end 15a of fin 8c compared with groove depth hc near the fin string central part 15c between fin inner peripheral side end portion 15b, groove depth ht of 15a side, above-mentioned wing periphery end and fin inner peripheral side end portion 15b side is shallower.In this case, even if forming groove 14 at fin suction surface 13a, the wall thickness of fin 8c also will not become very thin, and when not occurring at shaping, liquation periphery deteriorates, when assembling, intensity is not enough, it is possible to increase productivity ratio.

Even if it addition, make groove width g of groove 14, groove depth h as Figure 16 in the case of airfoil root 8c1 and finned length direction leading section 8c2 changes, the shape of the groove 14 on the cross section vertical with rotary shaft is also identical with embodiment 1.That is, make shape of corner, trench bottom 14b etc. formed by par M, the shape of groove sidepiece 14a, groove sidepiece 14a and fin suction surface 13a identical with embodiment 1 by trying every possible means, it is possible to reduce noise further, it is thus achieved that high efficiency cross flow fan.

It addition, Figure 18 represents the another structure example of the cross flow fan of present embodiment, it it is the front view representing 1 fin 8c.In the structure shown here, only such as 3 grooves 14 are set in the wing periphery side residing for the wing periphery side end 15a of fin suction surface 13a.The shape of single groove 14 is identical with Figure 17.

The most only in wing periphery side arranges the structure of groove 14, the effect that furthers at the wing periphery side end 15a acquisition groove 14 that inhalation area E1 air-flow is peeled off at first, it is possible in the stripping of inhalation area E1 suppression air-flow, be formed as stable air-flow, it is thus possible to prevent air-flow from peeling off at blowout region E2, it is thus achieved that the cross flow fan that energy is quiet and energy-conservation.

Alternatively, it is also possible to both arrange a plurality of groove 14 in wing periphery side end 15a side, also a plurality of groove 14 is set in fin inner peripheral side end portion 15b side.I.e., it is possible to the middle body at fin 8c does not arranges groove 14 ground, respectively a plurality of groove 14 is set in wing periphery side and fin inner circumferential side.Groove 14 is being located in the structure of fin inner peripheral side end portion 15b side, is being particular enable to obtain the effect that suppression air-flow is peeled off at blowout region E2.By on the fin suction surface 13a of either one of wing periphery side end 15a side and fin inner peripheral side end portion 15b side, a plurality of groove 14 extended along rotary shaft direction AX is set, it is possible to obtain a certain degree of effect that furthers.

Being described in embodiment 1, utilize the structure of device of installing cross flow fan 8, at air-flow in the case of inhalation area E1 is easily peeled off, it is effective for being located at by groove 14 near the wing periphery side end 15a of the upstream side becoming air-flow in inhalation area E1.It addition, at air-flow in the case of blowout region E2 is easily peeled off, it is effective for being located at by groove 14 near fin inner peripheral side end portion 15b blowing out the upstream side that region E2 becomes air-flow.

But, as shown in Figure 8 and Figure 9, if on the cross section vertical with rotary shaft, at fin suction surface 13a, groove 14 is set from wing periphery side end 15a to the whole surface of fin inner peripheral side end portion 15b, which position the most no matter air-flow is intended at fin suction surface 13a is peeling-off, the generation of this stripping can be prevented, so so arranging more efficient.

The above-mentioned groove 14 being located at fin suction surface 13a arranges finned length direction leading section 8c2 from airfoil root 8c1, and the length of groove 14 is formed as the most identical.Here, the structure example enabling the length of groove 14 to change is described.Figure 19 represents the another structure example of the cross flow fan of present embodiment, is the front view representing 1 fin 8c.In the structure shown here, it is arranged on 8c2 side, leading section, finned length direction while a plurality of groove 14 is not arranged in the airfoil root 8c1 of fin suction surface 13a.The shape of single groove 14 is identical with Figure 15, is formed as making groove depth h of groove 14 and either one increase of groove width g from airfoil root 8c1 airfoil length direction leading section 8c2.

In the case of fin 8c is pointed shape, in 8c2 side, leading section, finned length direction, foil thickness is thin, and chord length L1 is short for fin.Therefore, compared with airfoil root 8c1 side, the interval width between the airfoil pressure face 13b of fin suction surface 13a and adjacent fin, it is easily peeled off.Therefore, by least forming groove 14 in 8c2 side, leading section, finned length direction, it is possible to the effect suppression that furthers utilizing the negative pressure produced by groove 14 to be obtained is peeled off, it is achieved low noise.

Additionally, a plurality of groove 14 being formed at fin suction surface 13a is formed as the finned length direction along fin 8c, length J gradually changes.The end of the airfoil root 8c1 side of a plurality of groove 14 is set to groove side end 14c, the groove side end 14c making a plurality of groove 14 is formed obliquely groove 14 relative to impeller rotating shaft, so length J in the finned length direction of groove 14 incrementally changes along the peripheral direction of ring portion 8b.In the structure shown in Figure 19, in the way of length J that makes groove 14 from wing periphery side end 15a airfoil inner peripheral side end portion 15b is progressively longer, it is formed slopely groove 14.

Owing to the quantity of the groove 14 in fin string of a musical instrument direction is different because of the position in finned length direction, so in inhalation area E1, the air stream shown in Fig. 7 is different because of the position in finned length direction.In the case of being attached in such as air conditioner by cross flow fan, suction airflow is sometimes made to offset in inhalation area E1 because of the impact of resistance body etc. along finned length direction.Even if suction airflow offsets, in the structure shown in Figure 19, the effect that also can make to further is more smoothly varying along finned length direction.Therefore, it is possible to make wind speed profile homogenization, suppression speed local in flap surface increases, and makes steady air current realize low noise.

It addition, Figure 20 represents the another structure example of the cross flow fan of present embodiment, it it is the front view representing 1 fin 8c.In this structure example, it it is the structure making length J of groove 14 be gradually shortened from wing periphery side end 15a airfoil inner peripheral side end portion 15b.Using the groove 14 of this structure, as Figure 19, even if make suction airflow offset in inhalation area E1 because of the impact of resistance body etc. along finned length direction, the effect that also can make to further is more smoothly varying along finned length direction.Therefore, it is possible to make wind speed profile homogenization, suppression air-flow flow velocity in flap surface local increase, it is achieved stable air-flow and realize low noise.

Additionally, in that structure shown in Figure 19 and Figure 20, flow velocity, the change of angle when contacting with guiding wall 10 change along finned length directional smoothing, pressure oscillation decays, it is possible to more low noise.

It addition, Figure 21 represents the another structure example of the cross flow fan of present embodiment.Length J being configured to groove 14 gradually extends near central part from wing periphery side end 15a airfoil inner peripheral side end portion 15b, and near central part, airfoil inner peripheral side end portion 15b is gradually shortened.In such an embodiment, even if making suction airflow offset in inhalation area E1 along finned length direction because of the impact of resistance body etc., the effect that also can make to further is more smoothly varying along finned length direction.Therefore, it is possible to make wind speed profile homogenization, the flow velocity of suppression air-flow local in flap surface increases, it is achieved low noise.It addition, in blowout side region E2, blowout air-flow smoothly changes along finned length direction, flow velocity when contacting with guiding wall 10, change angle smoothing.Therefore, pressure oscillation decay, it is possible to more low noise.

Additionally, in the structure of Figure 21, the part that foil thickness at wing periphery side end 15a and fin inner peripheral side end portion 15b is thin, shorten the length of groove 14, along fin string of a musical instrument L direction, the part that the foil thickness near central part is thick increases the length of groove 14.It is accordingly possible to ensure the intensity of whole fin 8c, it is possible to prevent buckling when utilizing the method fixed installation impeller monomer 8d such as ultrasonic bonding each other.

As a result, cross flow fan can low noise further, and intensity when being able to ensure that the assembling of impeller, so not assembling loss, obtain peace and quiet and the good air conditioner of productivity ratio by installing this cross flow fan.

It addition, Figure 22 represents the another structure example of the cross flow fan of present embodiment.This structure makes finned length direction length J being formed at a plurality of groove 14 of fin suction surface 13a change brokenly.In this case, according to the difference of the position in finned length direction, the quantity of groove 14 changes along fin string of a musical instrument L direction.Therefore, even if air-flow offsets in inhalation area E1, it is intended to occur along finned length direction small stripping, also can spread under the effect of nigh air-flow.Thus, it is possible to make wind speed profile homogenization, it is achieved low noise.

Even if it addition, the upstream side at cross flow fan makes air-flow offset because of such as dust accretions in filter 5 grade, the stripping of air-flow also can be prevented, makes suction airflow stabilisation.Additionally, in blowout region E2 too, blowout air-flow changes brokenly along finned length direction, and flow velocity, angle when contacting with guiding wall 10 change brokenly.Therefore, pressure oscillation decays brokenly, it is possible to realize low noise.

Concave groove 14 set on fin suction surface 13a is arranged on according to the situation making cross flow fan carry out action think peeling-off position time, be effective.

As mentioned above, by making cross flow fan include: impeller monomer 8d, it possesses discoideus support plate 8b and multiple fin 8c, the centrally located portion of center of rotation of above-mentioned support plate 8b, above-mentioned multiple fin 8c configures along the periphery of above-mentioned support plate 8b, extend along rotary shaft direction, and two ends are supported by above-mentioned support plate 8b；Impeller 8a, fixedly mount multiple above-mentioned impeller monomer 8d along above-mentioned rotary shaft direction and constitute this impeller 8a, make the one end of above-mentioned fin 8c, the cross sectional shape vertical with rotary shaft at the connecting portion 8c1 being connected with above-mentioned support plate 8b, the other end than above-mentioned fin 8c, the cross sectional shape vertical with above-mentioned rotary shaft at the connecting portion 8c2 being connected with above-mentioned support plate 8b is big, and become on the fin suction surface 13a of rear surface in the direction of rotation relative to above-mentioned fin 8c, the a plurality of concave groove 14 extended along above-mentioned rotary shaft direction is set, productivity ratio and the cross flow fan of energy low noise can be kept it is thus possible to obtain.It addition, be prevented from because the rheology that puffs away obtains the adverse current to cross flow fan that is unstable and that occur.Even if additionally, flowing resistance increases, air-flow is not easy to peel off at fin suction surface 13a, and blowout air-flow is also stable.

It addition, in each figure of Figure 18～Figure 22, illustrate to be configured at finned length direction leading section 8c2 than the example big in airfoil root 8c1 side groove width g of groove 14 and at least one party of groove depth h, but the present invention be not limited to this.Stripping direction is made not to be impeller direction of rotation when at ester moulding but during other directions, it would however also be possible to employ groove width g of groove 14 and the identical groove 14 of groove depth h.In addition, it is impeller direction of rotation in view of making stripping direction when ester moulding, slot length is changed on the basis of the leading section 8c2 of finned length direction, but when being other directions making stripping direction, on the basis of arbitrary place on the basis of airfoil root 8c1 or by between finned length direction leading section 8c2 and airfoil root 8c1, then the groove of more irregular position and length can be set.As long as being at least configured to extend along rotary shaft direction AX on fin suction surface 13a, and in the way of there is par M between adjacent groove 14 separately regulation be positioned apart from groove, groove 14 airfoil suction surface 13a just can be utilized to further the air-flow to be peeled off, make this air-flow become stable air-flow.

It addition, make the change of groove width G as each figure of Figure 16～Figure 22 or make the change of groove depth h or the structure of that groove 14 that makes slot length J change, it is also possible to applying the shape at the fin 8c of embodiment 1 is not in the case of tip, plays same effect.It addition, this structure the most also can be applied in embodiment 2, play same effect.

Particularly in air conditioner, as shown in Figure 2, when fin 8c is by impeller inhalation area E1 of heat exchanger 7 side, owing to electric dust collector 6, filter 5 and the size of the suction inlet 2 etc. be only located at above air conditioner main body, multiple resistance bodies that flowing resistance is different arrange, unevenly so sucking wind speed to produce imbalance.Additionally, because when dust makes flowing resistance increase to attachment of the filter being arranged in impeller suction side etc., air-flow is relative to the change in angle of attack of fin, it is easily peeled off, the rheology that puffs away obtain unstable and to fan adverse current, thus impeller condensation may be made when cooling operation and to outside drain dew, thus floor of getting wet.For this, by any one cross flow fan in installing embodiment 1～embodiment 3, it is obtained in that stable air-flow, seek low noise and high efficiency, the stripping of air-flow can also be prevented relative to the change of flowing resistance, prevent the adverse current to fan occurred because of the instability of blowout air-flow, it is thus achieved that the quiet and air conditioner of high-quality.

So, use embodiment 1～embodiment 3, owing to forming a plurality of groove extended along rotary shaft direction AX on the fin suction surface 13a of the impeller of cross flow fan, it is possible to realize the flowing of stable air, it is thus achieved that sense of hearing is good, low noise and peace and quiet, high efficiency and energy-conservation cross flow fan.It addition, by installing this cross flow fan, it is possible to realize the flowing of stable air, it is possible to prevent impeller condensation when cooling operation and to outside drain dew, it is possible to obtain the air conditioner of high-quality.

It addition, in embodiment 1～embodiment 3, illustrate the structure example being installed in by cross flow fan in such as air conditioner, but the present invention be not limited to this.Such as can also apply as being installed in the cross flow fan in other devices such as air curtain.By using the cross flow fan that can reduce noise, there is the effect that can make to be equiped with the noise decrease of the device of this cross flow fan.

Description of reference numerals

1, air conditioner main body；2, suction inlet；3, blow-off outlet；7, heat exchanger；8, cross flow fan；8a, impeller；8b, support plate；8c, fin；8c1, airfoil root；8c2, leading section, finned length direction；8d, impeller monomer；9, regulator；10, guiding wall；12, motor；12a, motor reel；13a, fin suction surface；13b, airfoil pressure face；14, groove；14a, groove sidepiece；14b, trench bottom；14P, imagination intersection point；15a, wing periphery side end；15b, fin inner peripheral side end portion；16, fixed part；C, peristome；E1, inhalation area；E2, blowout region；L, the fin string of a musical instrument；L1, the length of fin string of a musical instrument L；L11, the fin chord length of airfoil root 8c1；L12, the fin chord length of finned length direction leading section 8c2；M, par；ML, par length；O, center of rotation；RO, direction of rotation；G, groove width；G1, the groove width of airfoil root 8c1；G2, the groove width of finned length direction leading section 8c2；H, groove depth；H1, the groove depth of airfoil root 8c1；H2, the groove depth of finned length direction leading section 8c2；Groove depth near ht, wing periphery side end 15a and near fin inner peripheral side end portion 15b；Hc, fin fin string of a musical instrument direction middle body near groove depth；The isopach of the thickness of K, wing periphery side end on the basis of airfoil pressure face or fin inner peripheral side end portion；Tmax, the maximum gauge of fin；Tmax1, the maximum gauge of airfoil root 8c1；Tmax2, the maximum gauge of finned length direction leading section 8c2.

Claims

1. a cross flow fan, it is characterized in that, this cross flow fan includes: impeller monomer, it possesses discoideus support plate and multiple fin, the centrally located portion of center of rotation of described discoideus support plate, the plurality of fin configures along the periphery of described support plate, extends along rotary shaft direction, and two ends are supported by described support plate；Impeller, fixedly mounts multiple described impeller monomers along described rotary shaft direction and constitutes this impeller；A plurality of concave groove, they are located at becomes on the fin suction surface of rear surface relative to the direction of rotation of described fin, extends along described rotary shaft direction；Par, it is located between adjacent groove separated a predetermined distancely；

The interval making adjacent described groove is bigger than the groove depth of described groove；

Constituted described groove by trench bottom with relative groove sidepiece, the connecting portion that described groove sidepiece is connected with described fin suction surface with described trench bottom is formed as the shape with fillet；

On the cross section vertical with described rotary shaft, the plurality of fin is at the wing periphery side end of the outer circumferential side at described support plate and be substantially arc-shaped between the fin inner peripheral side end portion of the inner circumferential side of described support plate, and, make the thickness of the fin of central part office between described wing periphery side end and described fin inner peripheral side end portion, bigger than the thickness of the fin at the thickness of the fin at described wing periphery side end and described fin inner peripheral side end portion, at least away from the airfoil pressure face becoming front surface relative to the described direction of rotation of described fin, the separately thickness ground of the fin at described wing periphery side end or described fin inner peripheral side end portion, described fin suction surface is provided with described groove；

Described a plurality of groove is located near at least one party end of described wing periphery side end and described fin inner peripheral side end portion；

The groove width of described groove and at least one party of groove depth is made to increase along described rotary shaft direction, make described wing periphery side end and the groove depth of described fin inner peripheral side end portion vicinity, more shallow than the groove depth of the central part office between described wing periphery side end and described fin inner peripheral side end portion.

Cross flow fan the most according to claim 1, it is characterised in that

The axial length of described rotation being formed at least one of groove in a plurality of described groove of described fin suction surface is made to change brokenly.

Cross flow fan the most according to claim 1 and 2, it is characterised in that

Making to be formed at the axial length of described rotation of at least one of groove in a plurality of described groove of described fin suction surface, the peripheral direction along described support plate is gradually increased or changes with reducing.

Cross flow fan the most according to claim 1 and 2, it is characterised in that this cross flow fan includes: motor, the motor reel of this motor is held within the described support plate of the end of described impeller, drives described impeller to rotate；Being fixed on the fixed part of described motor reel, it is positioned at the inner side of described impeller monomer；Peristome, in order to be able to make fixture insert described fixed part, forms this peristome by the interval local widening of the described fin of described impeller monomer；

Described a plurality of groove is at least located on the described fin suction surface of the direction of rotation side of the described impeller fin adjacent with described peristome.

Cross flow fan the most according to claim 1 and 2, it is characterised in that

Make described fin one end the connecting portion being connected with described support plate at the cross sectional shape vertical with rotary shaft, big with the cross sectional shape vertical with described rotary shaft at the connecting portion that described support plate is connected than the other end of described fin.

6. an air conditioner, it is characterised in that this air conditioner includes:

Cross flow fan described in claim 1 or 2；

Heat exchanger, it is arranged in the suction side stream formed by described cross flow fan, carries out heat exchange with the air sucked.