CN101595312B - Fan with sound-muffling box - Google Patents

Abstract

The invention provides a blower with a sound-absorbing box. The blower (60) has a double-suction centrifugal blower (9) inside the body (3), and a suction inlet sound-absorbing member (11) is arranged between the body suction inlet (1) and the double-suction centrifugal blower (9). , forming a box suction inlet side air passage (26) and a first suction inlet sound absorbing member air passage (27) having a triangular prism shape. With this structure, there is provided a blower (60) with a sound-absorbing box that reduces pressure loss, reduces input, increases static pressure, and suppresses airflow collision sound.

Description

The blower that has sound-muffling box

Technical field

The present invention relates to the blower that noise reduction parts etc. have sound-muffling box that is built-in with in equipment wind path such as ventilation blast apparatus etc.

Background technique

The blower that has sound-muffling box in the past is provided with shunting noise reduction parts near the body suction port.Shunting noise reduction parts are meant that the motor opposition side case suction port crosswind trackside at the noise reduction parts is provided with the noise reduction parts of corners such as recess.Also have, such blower in the past for example is disclosed in patent documentation 1 grade.

In addition, in the past the blower that has sound-muffling box is provided with wind deflector near the case suction port.Also have, such blower in the past for example is disclosed in patent documentation 2 grades.

Below, in the time of with reference to accompanying drawing, near the blower that has sound-muffling box in the past that the body suction port, is provided with shunting noise reduction parts is described.Figure 26 and Figure 27 represent to be provided with the blower that has sound-muffling box 100 in the past (below, be called blower 100) of shunting noise reduction parts.

Like Figure 26 and shown in Figure 27, be provided with blower 100 at the ceiling board back side 101.Blower 100 has body 106.Be provided with body suction port 102 (below, be called suction port 102) and body blow-off outlet 104 (below, be called blow-off outlet 104) in the side of body 106.Suction port 102 and suction side pipeline 103 (below, be called pipeline 103) connect, in order indoor 115 air to be sucked the inside of body 106, be arranged at the suction side of body 106.Blow-off outlet 104 with blow out duct 105 (below, be called pipeline 105) and connect, in order indoor 115 air to be blown out to outdoor 121, be arranged at the side that blows out of body 106 via body 106.In the set inside of body 106 double suction type centrifugal fan 111 (below, be called blower 111) is arranged.

Blower 111 has: fan case 107 (below, be called case 107), motor 108, motor opposition side case suction port 109 (below, be called suction port 109), motor-side case suction port 110 (below, be called suction port 110).And then, blower 111 built-in double suction type impellers 120 (below, be called impeller 120), mainboard 119 with discoid shape.Impeller 120 is arranged at the both sides of mainboard 119, has internal diameter blade 118, and this internal diameter blade 118 has the diameter substantially the same with suction port 109,110.Motor opposition side case suction port crosswind road 113 (below, be called wind path 113) be arranged at suction port 102 between the suction port 109, suction port 109 sides.Motor-side case suction port crosswind road 116 (below, be called wind path 116) be arranged at suction port 102 between the suction port 110, suction port 110 sides.And then, be case 107 with suction port 102 opposed sides the back side is connected with shunting noise reduction parts 112 at case 107.Shunting noise reduction parts 112 are provided with recess 114 in wind path 113 sides.Thus, shunting noise reduction parts 112 have the structure that forms corners.In addition, suction port 110 be arranged at motor external diameter 117 the outside.

If operation blower 111, then indoor 115 air are supplied in the inside of body 106 through pipeline 103.The air that is supplied in the inside of body 106 is shunted through shunting noise reduction parts 112.The air-flow that has been passed through wind path 116 in the air of shunting is inhaled into suction port 110.In addition, pass through wind path 113 air-flows and be inhaled into suction port 109.Pass through blower 111 from suction port 109 and suction port 110 inhaled airs.And then, from blow-off outlet 104 exhausts, through pipeline 105 to outdoor 121 exhausts.

In such blower in the past 100, because the existence of motor 108, wind path 116 is dwindled, and wind speed increases.In order to prevent to follow in this, cause noise to increase, will be to the less setting of the air-flow of wind path 116.That is, be provided with recess 114 in shunting noise reduction parts air-flow inflow 112, wind path 113 portion.Thus, the flow path cross sectional area of wind path 113 enlarges, and is many through the air-flow change of wind path 113.It is many that the air-flow of wind path 113 sides becomes, and pressure is provided with the air quantity difference of wind path 113 and wind path 116 and shunts.Also have, near the suction port 102 of wind path 113, flow path cross sectional area broadens, but near the suction port 109 of wind path 113, flow path cross sectional area reduces.Thus, near the suction port 109 of wind path 113, the pressure loss takes place.Owing to the pressure loss takes place, exists so-called input increase, static pressure reduction or stream to dwindle the air-flow that causes in the blower 100 in the past and collide the problem that sofar is given birth to.

In addition, in the time of with reference to Figure 28～Figure 30, near the blower that has sound-muffling box that the case suction port, is provided with wind deflector is described.Figure 28～Figure 30 representes to be provided with the blower 100a in the past (below, be called blower 100a) of wind deflector.

Like Figure 28～shown in Figure 30, be provided with blower 100a at the ceiling board back side 101.Blower 100a has body 106.Be provided with body suction port 102 and body blow-off outlet 104 in the side of body 106.Suction port 102 is connected with suction side pipeline 103, in order indoor 115 air to be sucked the inside of body 106, is arranged at the suction side of body 106.Blow-off outlet 104 with blow out duct 105 and be connected, in order indoor 115 air to be blown out to outdoor 121, be arranged at the side that blows out of body 106 via body 106.In the set inside of body 106 single induction type centrifugal blower 111a (below, be called blower 111a) is arranged.

Blower 111a has: fan case 107, single induction type impeller 120a (below, be called impeller 120a), motor 108, case suction port 109 (below, be called suction port 109a).Case 107 has: whirlpool dish 137, case side plate 138, ejiction opening 139, tongue 140.Impeller 120a is arranged at the mainboard 119 with discoid shape.In addition, impeller 120a is through motor 108, to sense of rotation 123 rotations.Be that intersection point 146 begins direction to the peripheral part 147 of the ejection oral-lateral of suction port 109a and tilts and be provided with wind deflector 148 from the positions that the center line of impeller 120a and body 106 intersect.

In addition, case suction port crosswind road 113a (below, be called wind path 113a) be arranged between the suction port 102 to suction port 109a, suction port 109a side.Also have, the width D of wind path 113a is littler than the internal diameter of suction port 109a.And then the center height of wind path 113a is formed at center height position 113b, and impeller 120a is set to center height becomes center height position 120b.

If operation blower 111a, then indoor 115 air is supplied in the inside of body 106 through pipeline 103.The air that is supplied in the inside of body 106 passes through wind path 113a.The periphery of the air-flow that has passed through wind path 113a dish 137 along the whirlpool, as ejiction opening sidewind 121 (below, be called air-flow 121) and lingual side air-flow 122 (below, be called air-flow 122) to shunting up and down.Air communication after the shunting is crossed wind deflector 148 deflections, is inhaled into suction port 109a.The air communication that is inhaled into suction port 109a is crossed blower 111a from pipeline 105 discharges.The air-flow that has passed through pipeline 105 is to outdoor 121 exhausts.

In such blower 100a in the past, for the suction port 109a that will lead from the air-flow of wind path 113a, wind deflector 148 is with respect to suction port 109a tilted configuration.Yet whirlpool dish 137 enlarges with the logarithm helical usually.Thus, the center height position 113b of the center height position 120b of impeller 120a and wind path 113a reduction departs from.Therefore, air-flow 121 is compared with air-flow 122, a large amount of shuntings.By the air-flow 121 shunted to when the sense of rotation 123 of the impeller 120a of the direction of wind deflector 148 belows is circled round, being directed to suction port 109a.In addition, air-flow 122 is formed the stream that circles round in advance that when the sense of rotation 123 of impeller 120a is circled round, is directed to suction port 109a by air-flow 121 pushings.

In suction port 109a, if the stream of circling round in advance of the sense of rotation of impeller 120a, then the relative velocity of the air-flow of the inflow of the impeller 120a in rotation is slack-off.Thus, air quantity reduces.And then, the collision from the air-flow of wind path 113a and the stream that circles round in advance takes place, near the turbulent flow of suction port 109a takes place.Thus, the problem that air quantity reduces, input increases, turbulence noise takes place that exists the pressure loss to cause among the blower 100a.

Patent documentation 1: TOHKEMY 2002-156139 communique

Patent documentation 2: Japan opens clear 61-119048 communique in fact

Summary of the invention

The present invention provides through shape and configuration to the noise elimination part part and studies, and suppresses the pressure loss in the noise reduction wind path, the blower that has sound-muffling box of the inhibition of the reduction of realization input, the increase of static pressure, air-flow collision sound.

And then the present invention provides through suppressing the generation of turbulent flow, the blower that has sound-muffling box of the minimizing of the inhibition of the realization pressure loss, the increase of air quantity, input, the inhibition of turbulence noise.

The blower that has sound-muffling box of the present invention; Wherein, Have case shape body, double suction type centrifugal fan, suction port sound-absorbing spare, case suction port crosswind road, the first suction port sound-absorbing spare wind path; Body have the body suction port and with the opposed body blow-off outlet of body suction port; Double suction type centrifugal fan has ejiction opening, Vorticose whirlpool dish, case suction port, have the fan case of the case side plate that is provided with the case suction port in bi-side, be arranged at the case suction port motor, utilize the double suction type impeller of motor driven; Body sound-absorbing spare is arranged between body suction port and the double suction type centrifugal fan; Case suction port crosswind road be formed at from the body suction port to the case suction port, by with the space of the internal surface of the opposed body of case suction port and double suction type centrifugal fan double team, the first suction port sound-absorbing spare wind path has the shape of the triangular column that the bight through the seamed edge that cuts suction port sound-absorbing spare forms.Through this structure, provide the pressure loss to reduce, guarantee air quantity, and then suppress to collide the blower that has sound-muffling box of the noise that produces by air-flow.

In addition; The blower that has sound-muffling box of the present invention; Wherein, Have case shape body, single induction type centrifugal blower, suction port sound-absorbing spare, case suction port crosswind road, the first suction port sound-absorbing spare wind path; Body have the body suction port and with the opposed body blow-off outlet of body suction port; Single induction type centrifugal blower has ejiction opening, Vorticose whirlpool dish, case suction port, have fan case, the motor of the case side plate that is provided with the case suction port in the side, utilize single induction type impeller of motor driven, and suction port sound-absorbing spare is arranged between body suction port and the single induction type centrifugal blower, case suction port crosswind road be formed at from the body suction port to the case suction port, by with the space of the internal surface of the opposed body of case suction port and single induction type centrifugal blower double team; The first suction port sound-absorbing spare wind path has the shape of triangular column, and is that the bight of the seamed edge through cutting suction port sound-absorbing spare forms.Through this structure, provide the pressure loss to reduce, guarantee air quantity, and then suppress to collide the blower that has sound-muffling box of the noise that produces by air-flow.

In addition; The blower that has sound-muffling box of the present invention; Wherein, Have case shape body, double suction type centrifugal fan, suction port sound-absorbing spare, case suction port crosswind road, the second suction port sound-absorbing spare wind path; Body have the body suction port and with the opposed body blow-off outlet of body suction port; Double suction type centrifugal fan has ejiction opening, Vorticose whirlpool dish, case suction port, have the fan case of the case side plate that is provided with the case suction port in bi-side, be arranged at the case suction port motor, utilize the double suction type impeller of motor driven; Body sound-absorbing spare is arranged between body suction port and the double suction type centrifugal fan; Case suction port crosswind road be formed at from the body suction port to the case suction port, by with the space of the internal surface of the opposed body of case suction port and double suction type centrifugal fan double team, the second suction port sound-absorbing spare wind path have be formed at suction port sound-absorbing spare, not towards the face on case suction port crosswind road and and the internal surface of the opposed body of suction port sound-absorbing spare between the shape of quadrangular shape in the space that is provided with.Through this structure, provide the pressure loss to reduce, guarantee air quantity, and then suppress to collide the blower that has sound-muffling box of the noise that produces by air-flow.

In addition; The blower that has sound-muffling box of the present invention; Wherein, Have case shape body, single induction type centrifugal blower, suction port sound-absorbing spare, case suction port crosswind road, the second suction port sound-absorbing spare wind path; Body have the body suction port and with the opposed body blow-off outlet of body suction port; Single induction type centrifugal blower has ejiction opening, Vorticose whirlpool dish, case suction port, have fan case, the motor of the case side plate that is provided with the case suction port in the side, utilize single induction type impeller of motor driven; Suction port sound-absorbing spare is arranged between body suction port and the single induction type centrifugal blower; Case suction port crosswind road be formed at from the body suction port to the case suction port, by with the space of the internal surface of the opposed body of case suction port and single induction type centrifugal blower double team, the second suction port sound-absorbing spare wind path has the shape of quadrangular shape, and be formed at suction port sound-absorbing spare, not towards the face on case suction port crosswind road and and the internal surface of the opposed body of suction port sound-absorbing spare between in the space that is provided with.Through this structure, provide the pressure loss to reduce, guarantee air quantity, and then suppress to collide the blower that has sound-muffling box of the noise that produces by air-flow.

And then; The blower that has sound-muffling box of the present invention; Wherein, Have case shape body, double suction type centrifugal fan, case suction port crosswind road, body sound-absorbing spare, rectification part; Body have the body suction port and with the opposed body blow-off outlet of body suction port; Double suction type centrifugal fan has ejiction opening, Vorticose whirlpool dish, case suction port, have the fan case of the case side plate that is provided with the case suction port in bi-side, be arranged at the case suction port motor, utilize the double suction type impeller of motor driven, case suction port crosswind road be formed at from the body suction port to the case suction port, by with the space of the internal surface of the opposed body of case suction port and double suction type centrifugal fan double team, body sound-absorbing spare is arranged between the internal surface of case suction port and body; Rectification part is formed at body sound-absorbing spare, and has vertical rectification section and horizontal rectification section.And then; Rectification part has the height dimension less than the height dimension of the inside of body; Make case suction port crosswind road narrow towards the ejection oral-lateral; Begin to make case suction port crosswind road narrow from the body plane side of the lingual side of double suction type centrifugal fan, with respect to the configuration face-to-face abreast of case side plate, vertical rectification section is disposed at the front of case suction port near the tongue of case side plate; And the airflow direction quadrature with respect to through case suction port crosswind road forms, and horizontal rectification section is with respect to the parallel formation of airflow direction through case suction port crosswind road.Through this structure, provide the case suction port pressure loss that near turbulent flow causes to be suppressed, wind path increases, and input reduces, the repressed blower that has sound-muffling box of turbulence noise.

And then; The blower that has sound-muffling box of the present invention; Wherein, Have case shape body, single induction type centrifugal blower, case suction port crosswind road, body sound-absorbing spare, rectification part, body have the body suction port and with the opposed body blow-off outlet of body suction port; Single induction type centrifugal blower has ejiction opening, Vorticose whirlpool dish, case suction port, have fan case, the motor of the case side plate that is provided with the case suction port in the side, utilize single induction type impeller of motor driven, case suction port crosswind road be formed at from the body suction port to the case suction port, by with the space of the internal surface of the opposed body of case suction port and single induction type centrifugal blower double team, body sound-absorbing spare is arranged between the internal surface of case suction port and body; Rectification part is formed at body sound-absorbing spare, and has vertical rectification section and horizontal rectification section.And then; Rectification part has the height dimension less than the height dimension of the inside of body; Make case suction port crosswind road narrow towards the ejection oral-lateral; Begin to make case suction port crosswind road narrow from the body plane side of the lingual side of single induction type centrifugal blower, and near the tongue of case side plate with respect to the configuration face-to-face abreast of case side plate, vertical rectification section is disposed at the front of case suction port; And the airflow direction quadrature with respect to through case suction port crosswind road forms, and horizontal rectification section is with respect to the parallel formation of airflow direction through case suction port crosswind road.Through this structure, provide the case suction port pressure loss that near turbulent flow causes to be suppressed, wind path increases, and input reduces, the repressed blower that has sound-muffling box of turbulence noise.

And then; The blower that has sound-muffling box of the present invention; Wherein, Have case shape body, double suction type centrifugal fan, case suction port crosswind road, body sound-absorbing spare, guide element; Body have the body suction port and with the opposed body blow-off outlet of body suction port; Double suction type centrifugal fan has ejiction opening, Vorticose whirlpool dish, case suction port, have the fan case of the case side plate that is provided with the case suction port in bi-side, be arranged at the case suction port motor, utilize the double suction type impeller of motor driven, case suction port crosswind road be formed at from the body suction port to the case suction port, by with the space of the internal surface of the opposed body of case suction port and double suction type centrifugal fan double team, body sound-absorbing spare is arranged between the internal surface of case suction port and body; Guide element is formed at body sound-absorbing spare, and has the vertical guide section.And then; Guide element has the substantially the same height dimension of height dimension with the inside of body; Make case suction port crosswind road narrow towards the ejection oral-lateral; With respect to the configuration face-to-face abreast of case side plate, the vertical guide section is disposed at the front of case suction port, and forms with respect to the airflow direction quadrature through case suction port crosswind road.Through this structure, provide the case suction port pressure loss that near turbulent flow causes to be suppressed, wind path increases, and input reduces, the repressed blower that has sound-muffling box of turbulence noise.

And then; The blower that has sound-muffling box of the present invention; Wherein, Have case shape body, single induction type centrifugal blower, case suction port crosswind road, body sound-absorbing spare, guide element, body have the body suction port and with the opposed body blow-off outlet of body suction port, single induction type centrifugal blower has ejiction opening, Vorticose whirlpool dish, case suction port, have fan case, the motor of the case side plate that is provided with the case suction port in the side, utilize single induction type impeller of motor driven; Case suction port crosswind road be formed at from the body suction port to the case suction port, by with the space of the internal surface of the opposed body of case suction port and single induction type centrifugal blower double team; Body sound-absorbing spare is arranged between the internal surface of case suction port and body, and guide element is formed at body sound-absorbing spare, and has the vertical guide section.And then; Guide element has the substantially the same height dimension of height dimension with the inside of body; Make case suction port crosswind road narrow towards the ejection oral-lateral; And with respect to the configuration face-to-face abreast of case side plate, the vertical guide section is disposed at the front of case suction port, and forms with respect to the airflow direction quadrature through case suction port crosswind road.Through this structure, provide the case suction port pressure loss that near turbulent flow causes to be suppressed, wind path increases, and input reduces, the repressed blower that has sound-muffling box of turbulence noise.

Description of drawings

Fig. 1 is the plan structure figure of the blower that has sound-muffling box of expression mode of execution 1 of the present invention.

Fig. 2 is near the stereogram the suction port sound-absorbing spare of the blower that has sound-muffling box shown in Figure 1.

Fig. 3 is the construction profile of the blower that has sound-muffling box shown in Figure 1.

Fig. 4 is the construction profile of the state that is provided with of the expression blower that has sound-muffling box shown in Figure 1.

Fig. 5 is the dimensionless performance figure of the characteristic of the expression blower that has sound-muffling box shown in Figure 1.

Fig. 6 is the plan structure figure of the blower that has sound-muffling box of expression mode of execution 2 of the present invention.

Fig. 7 A is near the stereogram the suction port sound-absorbing spare of the blower that has sound-muffling box shown in Figure 6.

Fig. 7 B is near the stereogram the suction port sound-absorbing spare of the blower that has sound-muffling box of other type of mode of execution 2 of the present invention.

Fig. 8 is the construction profile of the blower that has sound-muffling box shown in Figure 6.

Fig. 9 is the dimensionless performance figure of characteristic of the blower that has sound-muffling box of expression mode of execution 2 of the present invention.

Figure 10 is the plan structure figure of the blower that has sound-muffling box of expression mode of execution 3 of the present invention.

Figure 11 A is near the stereogram of suction port sound-absorbing spare of the expression blower that has sound-muffling box shown in Figure 10.

Figure 11 B is near the stereogram the suction port sound-absorbing spare of the blower that has sound-muffling box of other type of mode of execution 3 of the present invention.

Figure 11 C is near the stereogram the suction port sound-absorbing spare of the blower that has sound-muffling box of a mode again of mode of execution 3 of the present invention.

Figure 12 is near the stereogram of suction port sound-absorbing spare of the blower that has sound-muffling box of mode of execution 4 of the present invention.

Figure 13 is near the stereogram of suction port sound-absorbing spare of the blower that has sound-muffling box of mode of execution 5 of the present invention.

Figure 14 is near the stereogram of suction port sound-absorbing spare of the blower that has sound-muffling box of mode of execution 6 of the present invention.

Figure 15 A is the plan structure figure of the blower that has sound-muffling box of expression mode of execution 7 of the present invention.

Figure 15 B is the plan structure figure of the blower that has sound-muffling box of the other type of expression mode of execution 7 of the present invention.

Figure 16 is the construction profile of the blower that has sound-muffling box of expression mode of execution 8 of the present invention.

Figure 17 is the plan structure figure of the blower that has sound-muffling box shown in Figure 16.

Figure 18 A is the construction profile of the state that is provided with of the expression blower that has sound-muffling box shown in Figure 16.

Figure 18 B is the stereogram of the body sound-absorbing spare of the other type used in the expression blower that has sound-muffling box shown in Figure 16.

Figure 19 is the dimensionless performance figure of the characteristic of the expression blower that has sound-muffling box shown in Figure 16.

Figure 20 is the construction profile of the blower that has sound-muffling box of expression mode of execution 9 of the present invention.

Figure 21 A is the plan structure figure of the blower that has sound-muffling box shown in Figure 20.

Figure 21 B is the stereogram of the body sound-absorbing spare of the other type used in the expression blower that has sound-muffling box shown in Figure 20.

Figure 22 is the dimensionless performance figure of the characteristic of the expression blower that has sound-muffling box shown in Figure 20.

Figure 23 is the plan structure figure of the blower that has sound-muffling box of expression mode of execution 10 of the present invention.

Figure 24 A is the stereogram of the body sound-absorbing spare of the other type used in the expression blower that has sound-muffling box shown in Figure 23.

Figure 24 B is the stereogram of the body sound-absorbing spare of the mode again used in the expression blower that has sound-muffling box shown in Figure 23.

Figure 25 A is the plan structure figure of the blower that has sound-muffling box of expression mode of execution 11 of the present invention.

Figure 25 B is the plan structure figure of the blower that has sound-muffling box of the other type of expression mode of execution 11 of the present invention.

Figure 26 is a construction profile of representing the state that is provided with of the blower that has sound-muffling box in the past.

Figure 27 is the plan structure figure of the blower that has sound-muffling box in the past shown in Figure 26.

Figure 28 is the construction profile of the state that is provided with of the blower that has sound-muffling box in the past of expression other type.

Figure 29 is the plan structure figure of the blower that has sound-muffling box in the past shown in Figure 28.

Figure 30 is the construction profile of the identical in the past blower that has sound-muffling box shown in Figure 28.

Among the figure: 1-body suction port; 2-body blow-off outlet; The 3-body; 4-suction side pipeline; 5-sucks connector; 6-blows out duct; 7-blows out connector; The 8-wind path; The 9-double suction type centrifugal fan; 10-body sound-absorbing spare; 11-suction port sound-absorbing spare; The 12-motor; The 13-live axle; 14-double suction type impeller; The 15-ejiction opening; 16-whirlpool dish; 17-case side plate; The 18-fan case; 19-motor-side case suction port; 20-motor side opening; 21-motor opposition side case suction port; The opposite side opening of 22-motor; The 23-mainboard; The 24-blade; The 24a-width of blade; The 25-diameter; 26-case suction port crosswind road; 26a-motor-side case suction port crosswind road; 26b-motor opposition side case suction port crosswind road; The 27-first suction port sound-absorbing spare wind path; 28,39-body plane; 29-ejiction opening direction air-flow; 35-sprays air-flow; The 36-tongue; The 38-second suction port sound-absorbing spare wind path; 40-tongue direction air-flow; 41-sucks air-flow; The dish back side, 43-whirlpool wind path; The single induction type impeller of 44-; 46-motor external diameter; The single induction type centrifugal blower of 47-; 48-case suction port; The 51-rectification part; The vertical rectification section of 51a-; The horizontal rectification section of 51b-; The 52-guide element; 52a-vertical guide section; 53-ejiction opening side end; 54-running shaft direction air-flow; 55-ejiction opening sidewind; 55a-ejiction opening direction sucks air-flow; 56-lingual side air-flow; The 57-adverse current; 58-sucks air-flow; 60,60a, 60b, 60c, 60d, 60e, 60f, 60g, 60h, 60j, 60k, 60m-have the blower of sound-muffling box.

Embodiment

Below, in the time of with reference to accompanying drawing, mode of execution of the present invention is described.

(mode of execution 1)

Below, use Fig. 1～Fig. 5, mode of execution 1 of the present invention is described.Fig. 1 is the plan structure figure of the blower that has sound-muffling box 60 (below, be called blower 60) of expression mode of execution 1 of the present invention.Fig. 2 is near the stereogram the suction port sound-absorbing spare 11 (below, be called sound-absorbing spare 11) of blower 60 shown in Figure 1.Fig. 3 is the construction profile of blower 60 shown in Figure 1.Fig. 4 is the construction profile of the state that is provided with of expression blower 60 shown in Figure 1.In addition, Fig. 5 is the dimensionless performance figure of the characteristic of expression blower 60 shown in Figure 1.

Like Fig. 1～shown in Figure 4, blower 60 has body 3.Body 3 has the shape of case shape.In the side of body 3, body suction port 1 (below, be called suction port 1) and body blow-off outlet 2 (below, be called blow-off outlet 2) the difference opposite disposed.Suction port 1 and suction side pipeline 4 (below, be called pipeline 4) connect, and for air suction body 3 inside that will indoor 31, are arranged at the suction side of body 3.Blow-off outlet 2 with blow out duct 6 (below, be called pipeline 6) and connect, in order to blow out indoor 31 air to outdoor 32, be arranged at the side that blows out of body 3 via body 3.Body 3 has: the suction connector 5 that is used for pipeline 4 is connected in suction port 1; Be used for blowing out connector 7 with what pipeline 6 was connected in blow-off outlet 2.Body 3 has the wind path 8 that arrives blow-off outlet 2 from suction port 1 in the inside of body 3.Double suction type centrifugal fan 9 (below, be called blower 9), body sound-absorbing spare 10 (below, be called sound-absorbing spare 10) and suction port sound-absorbing spare 11 (below, be called sound-absorbing spare 11) are arranged at wind path 8.Also have, what the sound absorbing material that in sound-absorbing spare 10 and sound-absorbing spare 11, uses used is the porous material that contains a large amount of air in inside.As porous material, can utilize foamed resin materials such as glass wool or asbestos, foaming polyurethane resin, gypsum board etc.

Blower 9 has: motor 12, double suction type impeller 14 (below, be called impeller 14), ejiction opening 15, Vorticose whirlpool dish 16, fan case 18 (below, be called case 18).Impeller 14 is fixed in motor 12 via live axle 13.Ejiction opening 15 is opposed with blow-off outlet 2.The bi-side of case 18 comprise case side plate 17 (below, be called side plate 17).Side plate 17 has: with the motor side opening 20 of motor-side case suction port 19 (below, be called suction port 19) opening; The opposite side opening 22 of motor with motor opposition side case suction port 21 (below, be called suction port 21) opening.In addition, impeller 14 has: discoid mainboard 23 and a plurality of blades 24.Mainboard 23 is connected with live axle 13.Blade 24 is engaged in the both sides of mainboard 23.The outside dimension of blade 24 is the dimension D 1 of the diameter 25 of impeller 14.In addition, the size of the internal diameter of suction port 19 is bigger than the size of motor external diameter 46, and the internal diameter of suction port 19 is arranged at the outside of motor external diameter 46.In addition, width of blade 24a is the width dimensions of impeller 14.

And then, motor-side case suction port crosswind road 26a (below, be called wind path 26a) be formed at suction port 1 between the suction port 19, by with the space of the internal surface of suction port 19 opposed bodies 3 and blower 9 double teams in.In addition, likewise, motor opposition side case suction port crosswind road 26b (below, be called wind path 26b) be formed at suction port 1 between the suction port 21, by with the space of the internal surface of suction port 21 opposed bodies 3 and blower 9 double teams in.Also have, utilize wind path 26a and wind path 26b to form case suction port crosswind road 26 (below, be called wind path 26).And then, be formed with the first suction port sound-absorbing spare wind path 27 (below, be called wind path 27).The bight of the seamed edge of the sound-absorbing spare 11 that wind path 27 contacts on the airflow direction of wind path 26 cuts with cut lengths L1 and forms.Thus, wind path 27 has the shape of the triangular column basically of tri-prism edge lengths L1.

In addition, wind path 27 be positioned at ejiction opening 15 sides of blower 9, towards the inboard of the body 3 of body plane 28 sides of body 3.Thus, through the air-flow behind the wind path 27 near the blower 9 as being called towards the emission direction air-flow 29 of the centroclinal angle of the suction of impeller 14 (below, be called air-flow 29), flow into suction port 19 and flow out from ejiction opening 15.And then, flow into respect to the ejection air-flow 35 of the blade exit angular direction of impeller 14 (below, be called air-flow 35) through the air-flow behind the wind path 27 29 substantially parallelly.Thus, the air blast load tails off.

In addition, as shown in Figure 4, in the ceiling board back side 30, suction port 1 is connected with pipeline 4, and blow-off outlet 2 is connected with pipeline 6, thereby body 3 is constructed.Also have, if blower 9 operations, then indoor 31 air sucks in the blower 60 via pipeline 4.And then, the air that is inhaled into via blower 9 from pipeline 6 to outdoor 32 exhausts.Also have, the ceiling board back side 30 is separated by ceiling components 33 with indoor 31.And then ceiling components 33 has ceiling board access hole 34 in the bottom of body 3.

Through above structure, blower 60 of the present invention has wind path 26 and wind path 27.Through having wind path 26 and wind path 27, to compare with the blower that has sound-muffling box that only has wind path 26, the air quantity that gives wind path 27 increases.And then, from suction port 1 to suction port 19 and from suction port 1 to suction port 21 wind path area becomes big.Thus, the collision of air-flow loss tails off.

In addition,, flow into respect to air-flow 35 through the air-flow behind the wind path 27 29 substantially parallelly.Thus, the air blast of air-flow load tails off.That is the non-zone 37 of boosting of ejection portion (below, be called zone 37) till, from end portion that the logarithm of whirlpool dish 16 enlarges to tongue 36 is generally the inefficient zone of air blast of centrifugal blower.Yet air-flow 29 flows out between blade 24 smoothly, forms the air-flow 35 of blade 24 exit angle directions, and therefore, the air blast load tails off.

Like this, 1 blower 60 can be known according to the embodiment of the present invention, and the pressure loss in the wind path 26,27 reduces, and when guaranteeing air quantity, is hanged down inputization.And then, suppress to collide the noise that produces by air-flow.

Also have, cut the bight of the seamed edge of sound-absorbing spare 11 with cut lengths L1, when forming the wind path 27 of triangular column basically, towards the surface of the sound-absorbing spare 11 of the wind path 27 of triangular column basically or prism shape become circular-arcly, also can obtain identical effect and effect.

In addition, corresponding with the amount that the pressure loss in the wind path 26,27 reduces, impeller 14 also reduces corresponding amount and constitutes and also can.Thus, miniaturization blower 9, attenuate constitutes body 3.Its result reduces the height of setting the ceiling board back side 30, and the height space of the living space with indoor 31 is guaranteed broadly.In addition, when safeguarding, take out when the blower 60, even under the little situation of ceiling board access hole 34, also carry out operation easily.Like this, the maintainability of blower 60 is good.

And then Fig. 5 is the performance plot of roadability that has compared the blower that has sound-muffling box in the past and the blower of the present invention 60 of the suction port sound-absorbing spare with cuboid.Also have the flow coefficient of the blower 60 of solid line 61 expressions mode of execution 1 of the present invention and the relation of static pressure pressure coefficient, the flow coefficient of solid line 62 expression blowers 60 and the relation of static pressure efficiency.Likewise, the flow coefficient of the single-point line 71 expressions blower that has sound-muffling box in the past and the relation of static pressure pressure coefficient, the flow coefficient of the single-point line 72 expressions blower that has sound-muffling box in the past and the relation of static pressure efficiency.In addition, blower 60 shown in Figure 5 has: the both sides of the suction port sound-absorbing spare 11 of cuboid are cut with L1=70mm and the sound-absorbing spare 11 that constitutes.Also have, in double suction type centrifugal fan shown in Figure 5, all use the diameter D1 of double suction type impeller to be 176mm, the fan case height is 329mm, and number of poles is 4P, and the motor external diameter is the motor of 120mm.

As shown in Figure 5, in the scope of flow coefficient 0.13～0.26, compare with the blower that has sound-muffling box in the past, improve the static pressure efficiency of blower 60.That is, as stated, 19,21 wind path area becomes the amount of the increase that is equivalent to wind path 27 greatly from suction port 1 to suction port.Thus, reduce the collision loss of air-flow.And then, through the air-flow 35 of the air-flow behind the wind path 27 29, flow into respect to the blade exit angular direction of impeller 14 substantially parallelly.Thus, reduce the air blast load.

(mode of execution 2)

Below, use description of drawings mode of execution 2 of the present invention.Also have, to mark identical symbol, omit detailed explanation about the structure identical with mode of execution 1.Fig. 6 is the plan structure figure of the blower 60a that has sound-muffling box (below, be called blower 60a) of expression mode of execution 2 of the present invention.Fig. 7 A is near the stereogram the suction port sound-absorbing spare 11 of blower 60a shown in Figure 6.Fig. 7 B is near the stereogram the suction port sound-absorbing spare 11 of the blower 60b that has sound-muffling box (below, be called blower 60b) of the other type of mode of execution 2 of the present invention.Fig. 8 is the construction profile of blower 60a shown in Figure 6.Fig. 9 is the dimensionless performance figure of characteristic of the blower 60a that has sound-muffling box, the 60b of expression mode of execution 2 of the present invention.

The blower 60a of mode of execution 2 compares with the blower 60 of mode of execution 1, replaces the first suction port sound-absorbing spare wind path 27, has the second suction port sound-absorbing spare wind path 38 (below, be called wind path 38).Wind path 38 be formed at sound-absorbing spare 11 not towards the face of wind path 26 and and the internal surface of sound-absorbing spare 11 opposed bodies 3 between in the space that is provided with height L2.Also have, wind path 38 has the shape of quadrangular shape basically.In addition, sound-absorbing spare 11 is not meant and face towards the different sound-absorbing spare 11 of the face of wind path 26 towards the face of wind path 26.

In addition, wind path 38 be positioned at tongue 36 sides of blower 9, towards the inboard of the body 3 of body plane 39 sides of body 3.Thus, through the air-flow behind the wind path 38 near the blower 9 as be called towards the tongue direction air-flow 40 of the centroclinal angle of the suction of impeller 14 (below, be called air-flow 40, flow into suction port 19,21, flow out from ejiction opening 15.And then,, flow into respect to the suction air-flow 41 of the blade inlet angular direction of impeller 14 (below, be called air-flow 41) through the air-flow behind the wind path 38 40 substantially parallelly.Thus, wind speed increases, and pressure rises.

Through above structure, blower 60a of the present invention has wind path 26 and wind path 38.Through having wind path 26 and wind path 38, compare with the blower that has sound-muffling box that only has wind path 26, based on the air quantity increase of wind path 38.And then, from suction port 1 to suction port 19 and from suction port 1 to suction port 21 wind path area becomes big.Thus, the collision of air-flow loss tails off.

In addition,, flow into respect to air-flow 41 through the air-flow behind the wind path 38 40 substantially parallelly.Thus, the wind speed in blade 24 inlets increases, and pressure rises.That is, the low zone 42 of boosting of tongue of the beginning portion that enlarges as near the logarithm of the dish of the whirlpools the tongue 36 16 (below, be called zone 42) is generally the inefficient zone of air blast of centrifugal blower.Yet air-flow 40 is opposed with the Inlet cone angle of blade 24, forms the air-flow 41 of blade inlet angular direction, and therefore, wind speed increases, and carries out the pressure conversion easily.

Like this, 2 blower 60a can know according to the embodiment of the present invention, and the pressure loss in the wind path 26,38 reduces, when guaranteeing air quantity, and high static pressureization.And then, suppress to collide the noise that produces by air-flow.

Also have; Setting from the space of the height L2 of the interior table of sound-absorbing spare 11 opposed bodies 3; When forming the wind path 38 of quadrangular shape basically, towards the surface of the sound-absorbing spare 11 of the wind path 38 of quadrangular shape basically or prism shape become circular-arcly, also can obtain same effect and effect.

In addition, corresponding with the amount that the pressure loss in the wind path 26,38 reduces, impeller 14 also reduces corresponding amount and constitutes and also can.Thus, miniaturization blower 9, attenuate constitutes body 3.Its result reduces the height of setting the ceiling board back side 30, and the height space of the living space with indoor 31 is guaranteed broadly.In addition, when safeguarding, take out when the blower 60a, even under the little situation of ceiling board access hole 34, also carry out operation easily.Like this, the maintainability of blower 60a is good.

In addition; Shown in Fig. 7 B, on the face different, based on the blower 60 of above-mentioned mode of execution 1 with wind path 38; The first suction port sound-absorbing spare wind path 27 is arranged under the situation of the internal surface of the body 3 of body plane 28 sides of ejiction opening 15 sides of blower 9; And then, reduce the pressure loss based on wind path 27, obtain guaranteeing the blower 60b that has sound-muffling box of air quantity.

And then Fig. 9 is the performance plot of roadability that has compared the blower that has sound-muffling box in the past and the blower 60a of the present invention of the suction port sound-absorbing spare with cuboid.Also have the flow coefficient of the blower 60a of solid line 63 expressions mode of execution 2 of the present invention and the relation of static pressure pressure coefficient, the flow coefficient of solid line 64 expression blower 60a and the relation of static pressure efficiency.Likewise, the blower 60a that dotted line 65 is illustrated in mode of execution 2 of the present invention also is provided with flow coefficient and the relation of static pressure pressure coefficient of the blower 60b of wind path 27, the flow coefficient of dotted line 66 expression blower 60b and the relation of static pressure efficiency.In addition, the flow coefficient of the single-point line 71 expressions blower that has sound-muffling box in the past and the relation of static pressure pressure coefficient, the flow coefficient of the single-point line 72 expressions blower that has sound-muffling box in the past and the relation of static pressure efficiency.In addition, the distance from the internal surface of the sound-absorbing spare 11 opposed bodies 3 of cuboid among the blower 60a shown in Figure 9 constitutes height L2=20mm.Also have, double suction type centrifugal fan shown in Figure 9 all uses the diameter D1 of double suction type impeller to be 176mm, and the fan case height is 329mm, and number of poles is 4P, and the motor external diameter is the motor of 120mm.

As shown in Figure 9, in the scope of flow coefficient 0～0.26, to compare with the blower that has sound-muffling box in the past, the static pressure pressure coefficient of blower 60a increases.That is, as stated, 19,21 wind path area becomes the amount of the increase that is equivalent to wind path 38 greatly from suction port 1 to suction port.Thus, reduce the collision loss of air-flow.And then, through the air-flow 41 of the air-flow behind the wind path 38 40, flow into respect to the blade inlet angular direction of impeller 14 substantially parallelly.Thus, the wind speed in the blade inlet increases, and pressure rises.Static pressure pressure coefficient and then the increase of blower 60b.That is, be provided with the performance of effect such as wind path 27.

(mode of execution 3)

Below, use description of drawings mode of execution 3 of the present invention.Also have, the structure about identical with mode of execution 1,2 marks identical symbol, omits detailed explanation.Figure 10 is the plan structure figure of the blower 60c that has sound-muffling box (below, be called blower 60c) of expression mode of execution 3 of the present invention.Figure 11 A is near the stereogram the suction port sound-absorbing spare 11 of blower 60c shown in Figure 10.Figure 11 B is near the stereogram the suction port sound-absorbing spare 11 of blower 60c of other type of mode of execution 3 of the present invention.

The blower 60c of mode of execution 3 compares with the blower 60 of mode of execution 1, also is provided with whirlpool dish back side wind path 43 (below, be called wind path 43).That is, compare with Figure 11 A, between sound-absorbing spare 11 and whirlpool dish 16, be provided with the space of distance L 3 like Figure 10.Be formed with wind path 43 in the space between sound-absorbing spare 11 and whirlpool dish 16.And then wind path 43 is communicated with wind path 26a and wind path 26b.The air-flow that has passed through the wind path 26a of suction port 19 sides is inhaled into suction port 19.In addition, the air-flow that has passed through the wind path 26b of suction port 21 sides is inhaled into suction port 21.And then through configuration motor 12, the effective vent area of suction port 19 is little with respect to the opening area of suction port 21 sides.And then the air-flow and the motor 12 that have passed through wind path 26a collide.Thereby, through wind path 43 is set, the balance that keeps passing through the air-flow of wind path 26a and pass through the air-flow of wind path 26b.

As stated, the blower 60c of mode of execution 3 of the present invention has the wind path 43 of communication air duct 26a and wind path 26b.Compare with the pressure loss among the wind path 26b, the air communication of a part with wind path 26a of the big tendency of the pressure loss is crossed wind path 43, collaborates with wind path 26b.Thus, the pressure loss among the wind path 26a tails off.And then corresponding with the amount that the pressure loss among the wind path 26a reduces, impeller 14 also correspondingly reduces and constitutes and also can.Thus, miniaturization blower 9, body 3 attenuates and constituting compactly.Its result reduces the height of setting the ceiling board back side 30, and the height space of the living space with indoor 31 is guaranteed broadly.In addition, when safeguarding, take out when the blower 60c, even under the little situation of ceiling board access hole 34, also carry out operation easily.Like this, the maintainability of blower 60 is good.

In addition, the split ratio that sound-absorbing spare 11 causes is under near the situation of the approximate equality suction port 1, and also according to the pressure loss among the wind path 26a, the air communication of the part of wind path 26a is crossed wind path 43, flows to wind path 26b side, and the air-flow among the wind path 26b increases.Therefore, ad hoc requirement do not enlarge the wind path area of wind path 26b.In addition, do not require that also to use the sound-absorbing spare with complicated shape 11 that recess etc. is set to force that air quantity is set poor.Thereby the wind path 26 of suction port 1 vicinity forms minimal size.That is, corresponding with the amount that the pressure loss among the wind path 26a reduces, impeller 14 also correspondingly reduces and constitutes and also can.Thus, miniaturization blower 9, attenuate body 3 and constituting compactly.

As stated, 3 blower 60c can know according to the embodiment of the present invention, and the pressure loss among the wind path 26a reduces, when guaranteeing air quantity, and compactness blower 60c.And then, in blower 60c, suppress to collide the noise that produces by air-flow.

Also have, shown in Figure 11 B, form wind path 43 in the space of the distance L 3 that between sound-absorbing spare that is provided with wind path 38 11 and whirlpool dish 16, is provided with and also can.And then, shown in Figure 11 C, form wind path 43 in the space of the distance L 3 that between sound-absorbing spare 11 that is provided with wind path 27 and wind path 38 and whirlpool dish 16, is provided with and also can.No matter any, the blower 60c shown in Figure 11 B and Figure 11 C has effect same as described above and effect.

(mode of execution 4)

Below, use description of drawings mode of execution 4 of the present invention.Also have, the structure about identical with mode of execution 1～3 marks identical symbol, omits detailed explanation.Figure 12 is near the stereogram the suction port sound-absorbing spare 11 of the blower 60d that has sound-muffling box (below, be called blower 60d) of mode of execution 4 of the present invention.

The blower 60d of mode of execution 4 is shown in figure 12, and the cut lengths L1 in the bight of the seamed edge of the sound-absorbing spare 11 of formation wind path 27 is the dimension D 1 with respect to the diameter 25 of impeller 14, satisfies the structure of L1＜D1.

Through aforesaid structure, 19,21 wind path area becomes the amount of the increase that is equivalent to wind path 27 greatly from suction port 1 to suction port.Thus, the collision of air-flow loss reduces.And then the cut lengths L1 in the bight of the seamed edge of sound-absorbing spare 11 suitably diminishes with respect to the dimension D 1 of the diameter 25 of impeller 14.Its result, the volume of sound-absorbing spare 11 increases and constitutes.

Like this, 4 blower 60d can know according to the embodiment of the present invention, and the pressure loss in the wind path 26 reduces, and when guaranteeing air quantity, carries out the low noiseization of blower 60d.

(mode of execution 5)

Below, use accompanying drawing, mode of execution 5 of the present invention is described.Also have, the structure about identical with mode of execution 1～4 marks identical symbol, omits detailed explanation.Figure 13 is near the stereogram the suction port sound-absorbing spare 11 of the blower 60e that has sound-muffling box (below, be called blower 60e) of mode of execution 5 of the present invention.

The blower 60e of mode of execution 5 is shown in figure 13, and the distance L 2 between the sound-absorbing spare 11 of formation wind path 38 and the internal surface of body 3 is to satisfy the structure of L2＜D1 with respect to the dimension D 1 of the diameter 25 of impeller 14.

Through aforesaid structure, 19,21 wind path area becomes the amount of the increase that is equivalent to wind path 38 greatly from suction port 1 to suction port.Thus, the collision of air-flow loss tails off.And then the distance L 2 between the internal surface of sound-absorbing spare 11 and body 3 suitably diminishes with respect to the dimension D 1 of the diameter 25 of impeller 14.Its result, the volume of sound-absorbing spare 11 becomes big and constitutes.

Like this, 5 blower 60e can know according to the embodiment of the present invention, and the pressure loss in the wind path 26 reduces, and when guaranteeing air quantity, carries out the low noiseization of blower 60e.

(mode of execution 6)

Below, use accompanying drawing, mode of execution 6 of the present invention is described.Also have, the structure about identical with mode of execution 1～5 marks identical symbol, omits detailed explanation.Figure 14 is near the stereogram the suction port sound-absorbing spare 11 of the blower 60f that has sound-muffling box (below, be called blower 60f) of mode of execution 6 of the present invention.

The blower 60f of mode of execution 6 is shown in figure 14, and constituting the sound-absorbing spare 11 of wind path 43 and the distance L 3 between the whirlpool dish 16 is the dimension D 1 with respect to the diameter 25 of impeller 14, satisfies the structure of L3＜D1.

Through aforesaid structure, the part of the air-flow through wind path 26a is collaborated with wind path 26b through wind path 43.That is, the pressure loss among the wind path 26a and the pressure loss among the wind path 26b are big.Yet, through wind path 43 is set, air-flow through wind path 26a and the air-flow equalization through wind path 26b.Thus, the pressure loss among the wind path 26a tails off.And then the distance L 3 between sound-absorbing spare 11 and the whirlpool dish 16 suitably diminishes with respect to the dimension D 1 of the diameter 25 of impeller 14.Its result, the volume of sound-absorbing spare 11 becomes big and constitutes.

Like this, 6 blower 60f can know according to the embodiment of the present invention, and the pressure loss 11 in the wind path 26 reduces, and when guaranteeing air quantity, carries out the low noiseization of blower 60f.

Also have, blower 60f shown in Figure 14 is the structure with wind path 27, but have the structure of wind path 38 or have wind path 27 and the situation of the structure of wind path 38 under, also have identical effect and effect.

(mode of execution 7)

Below, use accompanying drawing, mode of execution 7 of the present invention is described.Also have, the structure about identical with mode of execution 1～6 marks identical symbol, omits detailed explanation.Figure 15 A is the plan structure figure of the blower 60g that has sound-muffling box (below, be called blower 60g) of expression mode of execution 7 of the present invention.Figure 15 B is the plan structure figure of blower 60g of the other type of expression mode of execution 7 of the present invention.

The blower 60g of mode of execution 7 compares with the blower 60 of mode of execution 1, replaces double suction type centrifugal fan 9, has single induction type centrifugal blower 47 (below, be called blower 47), and it has single induction type impeller 44 (below, be called impeller 44).That is, shown in Figure 15 A, blower 60g is the structure with blower 47 and wind path 27.

Through aforesaid structure, blower 60g increases to the wind path area till the case suction port 48.Thus, the collision of air-flow loss tails off.

Like this, 7 blower 60g can know according to the embodiment of the present invention, and the pressure loss among the wind path 26b reduces, and guarantees air quantity.And then, be inhibited and collided the blower 60g of the noise that produces by air-flow.

Also have, shown in Figure 15 B, blower 60g can be for having the structure of blower 47 and wind path 38.Blower 60g with blower 47 and wind path 38 reduces the pressure loss among the wind path 26b too, guarantees air quantity.And then, be inhibited and collided the blower 60g of the noise that produces by air-flow.In addition, not shown, but blower 60g can be for having the structure of blower 47, wind path 27, wind path 38.Blower 60g with blower 47, wind path 27, wind path 38 reduces the pressure loss among the wind path 26b too, guarantees air quantity.

(mode of execution 8)

Below, use accompanying drawing, mode of execution 8 of the present invention is described.Also have, the structure about identical with mode of execution 1～7 marks identical symbol, omits detailed explanation.Figure 16 is the construction profile of the blower 60h that has sound-muffling box (below, be called blower 60h) of expression mode of execution 8 of the present invention.Figure 17 is the plan structure figure of blower 60h shown in Figure 16.Figure 18 A is the construction profile of the state that is provided with of expression blower 60h shown in Figure 16.Figure 18 B is the stereogram of the body sound-absorbing spare 10 of the other type used among the expression blower 60h shown in Figure 16.Figure 19 is the dimensionless performance figure of the characteristic of expression blower 60h shown in Figure 16.

The blower 60h of mode of execution 8 such as Figure 16 and shown in Figure 17 compare with the blower 60 of mode of execution 1, on body sound-absorbing spare 10, have characteristic.And then blower 60h does not have suction port sound-absorbing spare 11.Below, the sound-absorbing spare 10 as the characteristic of the blower 60h of mode of execution 8 is described.

Sound-absorbing spare 10 is disposed at the internal surface with suction port 19,21 opposed bodies 3.The height dimension H of sound-absorbing spare 10 equates with the height dimension H of the inside of body 3.Also have, the center height of wind path 26 is positioned at center height position 26c, and the center height of impeller 14 is positioned at center height position 14a.

Be provided with rectification part 51 with rectangular section at sound-absorbing spare 10.The height dimension h1 of rectification part 51 is littler than the height dimension H of body 3.That is the relation that, has H＞h1.In addition, rectification part 51 makes wind path 26 promptly narrow down towards suction port 19,21 sides towards ejiction opening 15 sides of blower 9.And then rectification part 51 makes wind path 26 begin to narrow down from body plane 39 sides of tongue 36 sides of blower 9.In addition, rectification part 51 is configured to, and with respect to side plate 17, near tongue 36, disposes Face to face with side plate 17 abreast.

Be provided with vertical rectification section 51a (below, the section of being called 51a) at the end face of rectification part 51.Section 51a is positioned at the front of suction port 19,21.Section 51a forms with the airflow direction quadrature that passes through wind path 26.Be provided with horizontal rectification section 51b (below, the section of being called 51b) in the other end of rectification part 51.Section 51b and the parallel formation of airflow direction of passing through wind path 26.In addition, the section 51b with at slave body plane 39 to being arranged at rectification part 51 with body plane 39 parallel modes between the tongue 36.Thus, through the periphery of the air-flow behind the wind path 26, as ejiction opening sidewind 55 (below, be called 55) and lingual side air-flow 56 (below, be called air-flow 56), to shunting up and down along whirlpool dish 16.Air-flow 55 flows out from ejiction opening 15 becoming near the blower 9 as suck air-flow 55a (below, be called air-flow 55a) towards the ejiction opening direction of the centroclinal angle of the suction of impeller 14.Also have, rectification part 51 makes wind path 26 towards ejiction opening 15 sides, the amount of the thickness size d1 of the section of being equivalent to that narrows down 51a, the amount of the height dimension h1 that wind path 26 slave body planes 39 sides is narrowed down be equivalent to rectification part 51.

In addition, rectification part 51 is formed by the sound absorbing material that in sound-absorbing spare 11, uses and also can.And then the thickness size d1 of section 51a is that d1＞0.5 * D2 gets final product with respect to the width D 2 of wind path 26.Thus, the thickness size d1 with section 51a suitably sets with respect to the width D 2 of wind path 26.Its result, the sound absorbing material volume has increased and has increased the amount of sound absorbing material, and then gives the effect as sound-absorbing spare 10.

In addition, shown in Figure 18 B, sound-absorbing spare 10 and rectification part 51 are integrated and form and also can.Through sound-absorbing spare 10 and rectification part 51 integrated formation, cut down the number of packages of the parts that constitute blower 60h, realize that cost degradation and productivity improve.And then, improve when making wind path 26 narrow, positional accuracy, thereby stably obtain the effect and the effect of rectification part 51.

Through aforesaid structure, the air-flow that has passed through wind path 26 is supplied to suction port 19,21 deflections along section 51a and section 51b.Thus, near the stream that circles round in advance of the sense of rotation 13a of the impeller 14 the partition suction port 19,21.Through cutting off the stream that circles round in advance, suppress the generation of the turbulent flow of suction port 19,21 vicinity.

In addition, usually, in zone 42, be easy to generate adverse current 57, have the tendency that the air quantity in the suction port 19,21 reduces.Yet blower 60h of the present invention is formed with rectification part 51 in zone 42.Thus, suppress blowing out of adverse current 57.And then, be suppressed in the wind path 26 in the dead ahead front, rectification part 51 of rectification part 51, dwindle the increase of the pressure loss that is easy to generate by stream.And then air-flow 55a flows out with respect to ejection air-flow 35 substantially parallelly.Thus, the air blast of air-flow load tails off.That is, in zone 37, be generally the inefficient zone of air blast of centrifugal blower.Yet air-flow 55a flows into smoothly, flows out between blade 24, forms air-flow 35, and therefore, the air blast load tails off.In addition, at this moment, whirlpool dish 16 enlarges with the logarithm helical, and therefore, the center height position 14a of impeller 14 is lower more than the center height position 26c of wind path 26, and air-flow 55 is shunted than air-flow 56 more in a large number.Show above-mentioned effect and effect thus, and then significantly.

In addition, the thickness size d1 with the section 51a of the rectification part 51 that uses sound absorbing material to form suitably sets with respect to the width D 2 of wind path 26.Thereby, the amount of sound absorbing material increase that the sound absorbing material volume has become big, and then give effect as sound-absorbing spare 10.

Like this, the blower 60h of mode of execution 8 of the present invention suppresses the pressure loss that near the turbulent flows the suction port 19,21 cause.And then, suppress the generation of adverse current 57, the increase of the pressure loss in the wind path 26 in the dead ahead of inhibition rectification part 51.Thus, obtaining air quantity increases, and input reduces, and suppresses turbulence noise, simultaneously the blower 60h of low noiseization.

Also have, setting gets final product with a section 51b towards the section 51a of wind path 26, and the prism shape of rectification part 51 becomes circular-arc, also can obtain above-mentioned effect and effect.

In addition, corresponding with the amount that the pressure loss in the wind path 26 reduces, impeller 14 also reduces corresponding amount and constitutes and also can.Thus, miniaturization blower 9, attenuate body 3 and constituting.Its result reduces the height of setting the ceiling board back side 30, and the height space of the living space with indoor 31 is guaranteed broadly.In addition, when when safeguarding, taking out blower 60h, even under the little situation of ceiling board access hole 34, also carry out operation easily.Like this, the maintainability of blower 60h is good.

And then Figure 19 has compared the performance plot of wind deflector with respect to the roadability of in the past the blower that has sound-muffling box of case suction port tilted configuration and blower 60h of the present invention.Also have the flow coefficient of the blower 60h of solid line 67 expressions mode of execution 8 of the present invention and the relation of static pressure pressure coefficient, the flow coefficient of solid line 68 expression blower 60h and the relation of static pressure efficiency.Likewise, the flow coefficient of the dotted line 73 expressions blower that has sound-muffling box in the past and the relation of static pressure pressure coefficient, the flow coefficient of the dotted line 74 expressions blower that has sound-muffling box in the past and the relation of static pressure efficiency.In addition, blower 60h shown in Figure 19 has rectification part 51, and the thickness size of section 51a is d1=65mm, and the width of wind path 26 is D2=85mm.And then section 51b is configured to from tongue 36 beginnings opposed with the center height position 14a of the impeller 14 of below.Also have, double suction type centrifugal fan shown in Figure 19 all uses the diameter D1 of double suction type impeller to be 176mm, and the fan case height is 329mm, and number of poles is 4P, and the motor external diameter is the motor of 120mm.

Shown in figure 19, in the scope of flow coefficient 0.16～0.27, compare with the blower that has sound-muffling box in the past, improve the static pressure efficiency of blower 60h.That is, as stated, usually, zone 42 is easy to generate adverse current 57, and the air quantity in the suction port 19,21 is few.Yet blower 60h is provided with rectification part 51 in zone 42.Thus, suppress blowing out of adverse current 57, and the stream in the wind path 26 in the dead ahead of inhibition rectification part 51 dwindles the increase of the pressure loss that causes.In addition, air-flow 55a flows into substantially parallelly, flows out with respect to air-flow 35, and air blast load is few, thinks that above-mentioned effect gives through these effects.Also have, think in big air quantity zone, manifest effect and effect significantly, as stated, suppress the control of flowing of air-flow effectively to impeller 14.

Also have,, be illustrated as the structure that does not have sound-absorbing spare 11 of using mode of execution 1～7 explanation for the blower 60h of mode of execution 8.Yet; Through the additional sound-absorbing spare 11 that uses mode of execution 1～7 explanation on blower 60h; The pressure loss in blower that has sound-muffling box that obtains and then the inhibition noise reduction wind path, the blower that has sound-muffling box of the inhibition of the reduction of accomplished input, the increase of static pressure and air-flow collision sound.

(mode of execution 9)

Below, use accompanying drawing, mode of execution 9 of the present invention is described.Also have, the structure about identical with mode of execution 1～8 marks identical symbol, omits detailed explanation.Figure 20 is the construction profile of the blower 60j that has sound-muffling box (below, be called blower 60j) of expression mode of execution 9 of the present invention.Figure 21 A is the plan structure figure of blower 60j shown in Figure 20.Figure 21 B is the stereogram of the body sound-absorbing spare 10 of the other type used among the expression blower 60j shown in Figure 20.Figure 22 is the dimensionless performance figure of the characteristic of expression blower 60j shown in Figure 20.

The blower 60j of mode of execution 9 such as Figure 20 and shown in Figure 21 compare with the blower 60h of mode of execution 8, replace rectification part 51, have guide element 52.That is, be provided with guide element 52 with rectangular section at sound-absorbing spare 10.The height dimension h2 of guide element 52 is substantially the same with the height dimension H of body 3.That is the relation that, has H ≈ h2.In addition, guide element 52 makes wind path 26 promptly narrow down towards suction port 19,21 sides towards ejiction opening 15 sides of blower 9.And then guide element 52 is with respect to side plate 17 configuration face-to-face abreast.

In addition, be provided with vertical guide section 52a (below, the section of being called 52a) at the end face of guide element 52.Section 52a is positioned at the front of suction port 19,21.Section 52a forms with the airflow direction quadrature that passes through wind path 26.In addition, section 52a be arranged at suction port 19,21 ejiction opening side end 53 between the live axle 13.Thus, through the periphery of the dish 16 of the air-flow behind the wind path 26, as air-flow 55 and air-flow 56, to shunting up and down along the whirlpool.Air-flow 55 and air-flow 56 flow into suction port 19,21 forming near the blower 9 towards the running shaft direction air-flow 54 of live axle 13 directions (below, be called air-flow 54).Also have, guide element 52 makes wind path 26 towards the narrow down amount of thickness size d2 of the section of being equivalent to 52a of ejiction opening 15 sides.

In addition, guide element 52 is formed by the sound absorbing material that in sound-absorbing spare 11, uses and gets final product.And then the thickness size d2 of section 52a is that d2＞0.3 * D2 gets final product with respect to the width D 2 of wind path 26.Thus, the thickness size d2 with section 52a suitably sets with respect to the width D 2 of wind path 26.Its result, the sound absorbing material volume has increased the amount that is equivalent to the sound absorbing material increase, and then gives the effect as sound-absorbing spare 10.

In addition, shown in Figure 21 B, sound-absorbing spare 10 and guide element 52 are integrated and form and also can.Through sound-absorbing spare 10 and guide element 52 integrated formation, cut down the number of packages of the parts that constitute blower 60j, realize that cost degradation and productivity improve.And then, improve when making wind path 26 narrow, positional accuracy, thereby stably obtain the effect and the effect of guide element 52.

Through aforesaid structure, the air-flow that has passed through wind path 26 is supplied with to suction port 19,21 deflections along section 52a.Thus, near the stream that circles round in advance of the sense of rotation 13a of the impeller 14 the partition suction port 19,21.Through cutting off the stream that circles round in advance, near the generation of the turbulent flow the inhibition suction port 19,21.

In addition, be provided with guide element 52 in zone 37 and zone 42.Thus, be suppressed in the wind path 26 in dead ahead of guide element 52, dwindle the increase of the pressure loss that is easy to generate by stream.And then air-flow 54 flows into respect to the suction air-flow 58 of live axle 13 directions of impeller 14 (below, be called air-flow 58) substantially parallelly.Thus, the air blast of air-flow load tails off.That is, zone 42 is generally and is easy to generate adverse current 57, in addition, and the few zone of air quantity in the suction port 19,21.In addition, zone 37 is generally the inefficient zone of air blast of centrifugal blower.Yet air-flow 54 flows into suction port 19,21 smoothly, forms air-flow 58, and therefore, the air blast load tails off.

In addition, the thickness size d2 with the section 52a of the guide element 52 that uses sound absorbing material to form suitably sets with respect to the width D 2 of wind path 26.Thereby the sound absorbing material volume has become big and has been equivalent to the amount that sound absorbing material increases, and then gives the effect as sound-absorbing spare 10.

Like this, the blower 60j of mode of execution 9 of the present invention suppresses the pressure loss that near the turbulent flows the suction port 19,21 cause.And then, the increase of the pressure loss in the wind path 26 in the dead ahead of inhibition guide element 52.Thus, obtaining air quantity increases, and input reduces, and suppresses the blower 60j of turbulence noise, while low noiseization.

Also have, setting gets final product towards the section 52a of wind path 26, and the prism shape of guide element 52 becomes circular-arc, also can obtain above-mentioned effect and effect.

In addition, corresponding with the amount that the pressure loss in the wind path 26 reduces, impeller 14 also reduces corresponding amount and constitutes and also can.Thus, miniaturization blower 9, attenuate body 3 and constituting.Its result reduces the height of setting the ceiling board back side 30, and the height space of the living space with indoor 31 is guaranteed broadly.In addition, when safeguarding, take out when the blower 60j, even under the little situation of ceiling board access hole 34, also carry out operation easily.Like this, the maintainability of blower 60j is good.

And then Figure 22 has compared the performance plot of wind deflector with respect to the roadability of in the past the blower that has sound-muffling box of case suction port tilted configuration and blower 60j of the present invention.Also have the flow coefficient of the blower 60j of solid line 69 expressions mode of execution 9 of the present invention and the relation of static pressure pressure coefficient, the flow coefficient of solid line 70 expression blower 60j and the relation of static pressure efficiency.Likewise, the flow coefficient of the dotted line 73 expressions blower that has sound-muffling box in the past and the relation of static pressure pressure coefficient, the flow coefficient of the dotted line 74 expressions blower that has sound-muffling box in the past and the relation of static pressure efficiency.In addition, blower 60j shown in Figure 22 has guide element 52, and the thickness size of section 52a is d2=35mm, and the width of wind path 26 is D2=85mm.And then section 52a is configured to the live axle 13 of impeller 14 opposed.Also have, in double suction type centrifugal fan shown in Figure 22, all use the diameter D1 of double suction type impeller to be 176mm, the fan case height is 329mm, and number of poles is 4P, and the motor external diameter is the motor of 120mm.

Shown in figure 22, in the scope of flow coefficient 0.20～0.27, compare with the blower that has sound-muffling box in the past, improve the static pressure efficiency of blower 60j.That is, as stated, be provided with guide element 52 in zone 37 and zone 42.Thus, the stream in the wind path 26 in the dead ahead of inhibition guide element 52 dwindles the increase of the pressure loss that causes.In addition, think that air-flow 54 with respect to the air-flow 58 of live axle 13 directions, flows into substantially parallelly, thereby the air blast load tails off.Also have, think in big air quantity zone, manifest effect and effect significantly, as stated, carry out the control of flowing effectively to the air-flow of impeller 14.

Also have,, be illustrated as the structure that does not have sound-absorbing spare 11 of using mode of execution 1～7 explanation for the blower 60j of mode of execution 9.Yet; Through sound-absorbing spare 11 in 1～7 explanation of the additional use of blower 60j mode of execution; The pressure loss in blower that has sound-muffling box that obtains and then the inhibition noise reduction wind path, the blower that has sound-muffling box of the inhibition of the minimizing of accomplished input, the increase of static pressure and air-flow collision sound.

(mode of execution 10)

Below, use accompanying drawing, mode of execution 10 of the present invention is described.Also have, the structure about identical with mode of execution 1～9 marks identical symbol, omits detailed explanation.Figure 23 is the plan structure figure of the blower 60k that has sound-muffling box (below, be called blower 60k) of expression mode of execution 10 of the present invention.Figure 24 A is the stereogram of the body sound-absorbing spare 10 of the other type used among the expression blower 60k shown in Figure 23.Figure 24 B is the stereogram of the body sound-absorbing spare 10 of the mode again used among the expression blower 60k shown in Figure 23.

The blower 60k of mode of execution 10 compares with the blower 60h of mode of execution 8, also has the guide element 52 of explanation in mode of execution 9.That is, shown in figure 23, rectification part 51 is arranged at sound-absorbing spare 10 with guide element 52.And then the thickness size d1 of section 51a compares greatly with the thickness size d2 of section 52a.That is the relation that, has d1＞d2.

Through aforesaid structure, the air-flow that has passed through wind path 26 is supplied with to suction port 19,21 deflections along section 51a and section 51b.And then the air-flow that has passed through wind path 26 is supplied with to suction port 19,21 deflections along section 52a.Thus, near the stream that circles round in advance of the sense of rotation 13a of the impeller 14 the partition suction port 19,21.Through cutting off the stream that circles round in advance, near the generation of the turbulent flow the inhibition suction port 19,21.

Like this, the blower 60k of mode of execution 10 of the present invention has: have the characteristic that the blower 60j of characteristic that the blower 60h of mode of execution 8 had and mode of execution 9 is had.Thus, near the generation of the turbulent flow blower 60k and then the inhibition suction port 19,21, and then suppress the pressure loss that turbulent flow causes.Thus, obtain air quantity and then increase, input and then reduce, and then when suppressing turbulence noise, the blower 60k of low noiseization.

And then shown in Figure 24 A and Figure 24 B, sound-absorbing spare 10 and rectification part 51 and guide element 52 are integrated and form and also can.That is,, constitute with guide element 52 at sound-absorbing spare 10 integrated rectification parts 51 through the section shape of sound-absorbing spare 10 self is thickeied formation partly.Like this, simple in structure through sound-absorbing spare 10 and rectification part 51 and guide element 52 integrated formation, reduction constitutes the number of packages of the parts of blower 60j, realizes that cost degradation and productivity improve.And then, improve when making wind path 26 narrow, positional accuracy, stably obtain the effect and the effect of guide element 52.Also have, according to the size of the air quantity and the body 3 of necessity, sound-absorbing spare 10 integrated rectification parts 51 or guide element 52 any and constitute also can, obtain same effect and effect.

In addition, for the blower 60k of mode of execution 10, be illustrated as the structure that does not have sound-absorbing spare 11 of using mode of execution 1～7 explanation.Yet; Through sound-absorbing spare 11 in 1～7 explanation of the additional use of blower 60k mode of execution; The pressure loss in blower that has sound-muffling box that obtains and then the inhibition noise reduction wind path, the blower that has sound-muffling box of the inhibition of the minimizing of accomplished input, the increase of static pressure and air-flow collision sound.

(mode of execution 11)

Below, use accompanying drawing, mode of execution 11 of the present invention is described.Also have, the structure about identical with mode of execution 1～10 marks identical symbol, omits detailed explanation.Figure 25 A is the plan structure figure of the blower 60m that has sound-muffling box (below, be called blower 60m) of expression mode of execution 11 of the present invention.Figure 25 B is the plan structure figure of blower 60m of the other type of expression mode of execution 11 of the present invention.

The blower 60m of mode of execution 11 compares with the blower 60h of mode of execution 8, replaces blower 9, has blower 47.That is, shown in Figure 25 A, blower 60m is the structure with blower 47 and rectification part 51.

Through aforesaid structure, the air-flow that has passed through wind path 26 is supplied with to suction port 21 deflections along section 51a and section 51b.Thus, near the stream that circles round in advance of the sense of rotation 13a of the impeller 44 the partition suction port 21.Through cutting off the stream that circles round in advance, near the generation of the turbulent flow the inhibition suction port 21.

Like this, the blower 60m of mode of execution 11 of the present invention suppresses the pressure loss that near the turbulent flows the suction port 21 cause.And then, can suppress the increase of the pressure loss in the wind path 26 in dead ahead of rectification part 51.Thus, obtaining air quantity increases, and input reduces, when suppressing turbulence noise, and the blower 60m of low noiseization.

In addition, shown in Figure 25 B, blower 60m is that the structure with blower 47 and guide element 52 also can.Blower 60m with blower 47 and guide element 52 suppresses the pressure loss that near suction port 21 turbulent flows cause too.And then, the increase of the pressure loss in the wind path 26 in the dead ahead of inhibition guide element 52.Thus, obtaining air quantity increases, and input reduces, when suppressing turbulence noise, and the blower 60m of low noiseization.In addition, not shown, but blower 60m can be for having the structure of blower 47, rectification part 51 and guide element 52.Blower 60m with blower 47, rectification part 51 and guide element 52 suppresses the pressure loss that near suction port 19,21 turbulent flows cause too.

Utilizability on the industry

The air such as blast apparatus or air conditioner, dehumidifier, humidifier, air cleaner that the invention is not restricted to take a breath are carried purpose; Use is from the air blast of body blow-off outlet; Also be applicable to thus and can carry out the cooling of equipment machine, the pressure loss is few, guarantees air quantity; Cooling effect is high, the purposes of the air blast of the equipment machine that is provided with compactly.

Claims (29)

1. A blower with a sound-absorbing box, wherein: A box-shaped body, which has a body suction port and a body blowout port opposite to the body suction port; A double-suction centrifugal blower is provided inside the body, and has a discharge port, a vortex-shaped scroll, a case suction port, a fan case with case side plates provided with the case suction port on both sides, a motor provided at the suction port of the tank, and a double-suction impeller driven by the motor; A suction inlet sound-absorbing part, which is arranged between the suction inlet of the body and the double-suction centrifugal blower; A tank suction inlet side air path formed between the body suction inlet and the tank suction inlet, by the inner surface of the body facing the tank suction inlet and the double-suction centrifugal blower In the double-teaming space; The first suction inlet sound absorbing material air path has a triangular prism shape and is formed by cutting out corners of the edges of the suction inlet sound absorbing material. 2. The blower with sound absorbing box according to claim 1, wherein, The first suction port sound absorbing material air passage is formed on the inner surface side of the body on the side of the discharge port. 3. The blower with sound-absorbing box according to claim 1 or 2, wherein, The airflow after passing through the first suction inlet sound-absorbing member air passage flows out from the discharge outlet at an angle inclined toward the suction center of the double-suction impeller in the vicinity of the double-suction centrifugal blower. airflow. 4. The blower with sound absorbing box according to claim 1 or 2, wherein, The cutting dimension L1 of the right-angled side of the corner of the suction inlet sound absorbing member is L1<D1 with respect to the diameter D1 of the double-suction impeller. 5. The blower with sound absorbing box according to claim 1 or 2, wherein, An air path behind the scroll is formed in a space provided between the suction inlet sound absorbing material and the scroll. 6. The blower with sound absorbing box according to claim 5, wherein, A distance L3 of a space between the suction inlet sound absorbing material forming the air path behind the scroll and the scroll is L3<D1 with respect to the diameter D1 of the double-suction impeller. 7. A blower with a sound-absorbing box, wherein: A box-shaped body, which has a body suction port and a body blowout port opposite to the body suction port; A single-suction centrifugal blower, which is installed inside the body, and has a discharge port, a spiral scroll, a case suction port, a fan case with a case side plate provided with the case suction port on the side, and a motor. . A single-suction impeller driven by the motor; A suction inlet sound-absorbing member, which is arranged between the suction inlet of the body and the single-suction centrifugal blower; A tank suction inlet-side air path formed between the body suction inlet and the tank suction inlet by the inner surface of the body facing the tank suction inlet and the single-suction centrifugal blower In the double-teaming space; The first suction inlet sound absorbing material air path has a triangular prism shape and is formed by cutting out corners of the edges of the suction inlet sound absorbing material. 8. A blower with a sound-absorbing box, wherein: A box-shaped body, which has a body suction port and a body blowout port opposite to the body suction port; A double-suction centrifugal blower is provided inside the body, and has a discharge port, a vortex-shaped scroll, a case suction port, a fan case with case side plates provided with the case suction port on both sides, a motor provided at the suction port of the tank, and a double-suction impeller driven by the motor; A suction inlet sound-absorbing part, which is arranged between the suction inlet of the body and the double-suction centrifugal blower; A tank suction inlet side air path formed between the body suction inlet and the tank suction inlet, by the inner surface of the body facing the tank suction inlet and the double-suction centrifugal blower In the double-teaming space; The second suction inlet sound absorbing member air passage has a quadrangular column shape and is formed on a surface of the suction inlet sound absorbing member that does not face the air passage on the tank suction inlet side and opposite to the suction inlet sound absorbing member. placed in the space provided between the inner surfaces of the body. 9. The blower with sound absorbing box according to claim 8, wherein: The second suction inlet sound-absorbing member air passage is formed on the inner surface of the body on the body plane side facing the tongue side of the double-suction centrifugal blower. 10. A blower with sound absorbing box according to claim 8 or 9, wherein, The airflow after passing through the sound-absorbing member air path of the second suction port forms a tongue direction that flows out from the discharge port at an angle inclined toward the suction center of the double-suction impeller in the vicinity of the double-suction centrifugal blower. airflow. 11. A blower with sound absorbing box according to claim 8 or 9, wherein, There is also a first air inlet sound absorbing member air path having a triangular prism shape formed by cutting corners of edges of the inlet sound absorbing member, The first inlet sound absorbing material air passage is formed on a surface of the inlet sound absorbing material that is different from the surface on which the second inlet sound absorbing material air passage is formed. 12. The blower with sound attenuating box according to claim 11, wherein, The cutting dimension L1 of the right-angled side of the corner of the suction inlet sound absorbing member is L1<D1 with respect to the diameter D1 of the double-suction impeller. 13. A blower with sound absorbing box according to claim 8 or 9, wherein, The distance L2 of the space provided between the suction inlet sound absorbing member forming the air path of the second suction inlet sound absorbing member and the inner surface of the body is L2< D1. 14. A blower with sound absorbing box according to claim 8 or 9, wherein, An air path behind the scroll is formed in a space provided between the suction inlet sound absorbing material and the scroll. 15. The blower with sound attenuating box of claim 14, wherein: A distance L3 of a space between the suction inlet sound absorbing material forming the air path behind the scroll and the scroll is L3<D1 with respect to the diameter D1 of the double-suction impeller. 16. A blower with a sound-absorbing box, wherein: A box-shaped body, which has a body suction port and a body blowout port opposite to the body suction port; A single-suction centrifugal blower, which is installed inside the body, and has a discharge port, a spiral scroll, a case suction port, a fan case with a case side plate provided with the case suction port on the side, and a motor. . A single-suction impeller driven by the motor; A suction inlet sound-absorbing member, which is arranged between the suction inlet of the body and the single-suction centrifugal blower; A tank suction inlet-side air path formed between the body suction inlet and the tank suction inlet by the inner surface of the body facing the tank suction inlet and the single-suction centrifugal blower In the double-teaming space; The second suction inlet sound absorbing member air passage has a quadrangular column shape and is formed on a surface of the suction inlet sound absorbing member that does not face the air passage on the tank suction inlet side and opposite to the suction inlet sound absorbing member. placed in the space provided between the inner surfaces of the body. 17. A blower with a sound-absorbing box, wherein: A box-shaped body, which has a body suction port and a body blowout port opposite to the body suction port; A double-suction centrifugal blower is provided inside the body, and has a discharge port, a vortex-shaped scroll, a case suction port, a fan case with case side plates provided with the case suction port on both sides, a motor provided at the suction port of the tank, and a double-suction impeller driven by the motor; A tank suction inlet side air path formed between the body suction inlet and the tank suction inlet, by the inner surface of the body facing the tank suction inlet and the double-suction centrifugal blower In the double-teaming space; a body sound absorbing member disposed between the tank suction inlet and the inner surface of the body; a rectification part, which is formed on the sound-absorbing part of the machine body, and has a vertical rectification section and a horizontal rectification section, The rectifying member has a height dimension smaller than the height dimension of the inside of the body, narrows the air path on the side of the tank suction port toward the discharge port side, and narrows the air passage on the side of the tongue of the double-suction centrifugal blower from the plane of the body on the tongue side of the double-suction centrifugal blower. The air path on the side of the box suction inlet is narrowed from the side, and it is arranged parallel to the box side plate in the vicinity of the tongue portion of the box side plate, The vertical rectification section is arranged in front of the tank suction inlet, and is formed perpendicular to the airflow direction passing through the side air path of the tank suction inlet, The horizontal rectification section is formed parallel to the airflow direction passing through the air passage on the side of the tank suction inlet. 18. The blower with sound attenuating box of claim 17, wherein: The horizontal rectifying section is arranged parallel to the body plane between the body plane on the tongue side of the double-suction centrifugal blower and the tongue of the double-suction centrifugal blower, The air flow on the discharge port side after passing through the air passage on the suction port side of the case forms a discharge port that flows out from the discharge port at an angle inclined toward the suction center of the double suction type impeller near the double suction type centrifugal blower. Direction to inhale airflow. 19. A blower with sound absorbing box according to claim 17 or 18, wherein, The rectifying part is formed of a sound-absorbing material, The thickness dimension d1 of the vertical rectification section is d1>0.5×D2 relative to the width D2 of the air passage on the side of the tank suction inlet. 20. A blower with a sound attenuating box according to claim 17 or 18, wherein: The body sound-absorbing member is integrally formed with the rectifying component. 21. A blower with a sound-absorbing box, wherein, A box-shaped body, which has a body suction port and a body blowout port opposite to the body suction port; A single-suction centrifugal blower, which is installed inside the body, and has a discharge port, a spiral scroll, a case suction port, a fan case having a case side plate provided with the case suction port on the side, and a motor. . A single-suction impeller driven by the motor; A tank suction inlet side air path formed between the body suction inlet and the tank suction inlet, by the inner surface of the body facing the tank suction inlet and the single-suction centrifugal blower In the double-teaming space; a body sound absorbing member disposed between the tank suction inlet and the inner surface of the body; a rectification part, which is formed on the sound-absorbing part of the machine body, and has a vertical rectification section and a horizontal rectification section, The rectifying member has a height dimension smaller than the height dimension of the inside of the body, narrows the air passage on the side of the tank suction port toward the discharge port side, and narrows the air passage on the side of the tongue of the single-suction centrifugal blower from the plane of the body on the tongue side of the single-suction centrifugal blower. The air path on the side of the box suction inlet is narrowed from the side, and it is arranged parallel to the box side plate in the vicinity of the tongue portion of the box side plate, The vertical rectification section is arranged in front of the tank suction inlet, and is formed perpendicular to the airflow direction passing through the side air path of the tank suction inlet, The horizontal rectification section is formed parallel to the airflow direction passing through the air passage on the side of the tank suction inlet. 22. A blower with a sound-absorbing box, wherein: A box-shaped body, which has a body suction port and a body blowout port opposite to the body suction port; A double-suction centrifugal blower is provided inside the body, and has a discharge port, a vortex-shaped scroll, a case suction port, a fan case with case side plates provided with the case suction port on both sides, a motor provided at the suction port of the tank, and a double-suction impeller driven by the motor; A tank suction inlet side air path formed between the body suction inlet and the tank suction inlet, by the inner surface of the body facing the tank suction inlet and the double-suction centrifugal blower In the double-teaming space; a body sound absorbing member disposed between the tank suction inlet and the inner surface of the body; a guide member formed on the body sound absorbing member and having a vertical guide section, The guide member has substantially the same height as the inside of the body, narrows the air passage on the side of the tank suction port toward the discharge port side, and is disposed parallel to the tank side plate and faces each other. , The vertical guide section is arranged in front of the tank suction inlet, and is formed perpendicularly to the airflow direction passing through the side air passage of the tank suction inlet. 23. The blower with sound attenuating box of claim 22, wherein: The vertical guide section is provided to face the guide member from the end of the tank suction port on the discharge port side to the rotation shaft of the double-suction impeller, The outlet-side airflow and the tongue-side airflow that have passed through the air passage on the box suction inlet side form a rotation in the vicinity of the double-suction centrifugal blower that flows into the box suction inlet in the direction of the rotation axis of the double-suction impeller. Axial airflow. 24. A blower with sound attenuating box according to claim 22 or 23, wherein, the guide member is formed of a sound-absorbing material, The thickness dimension d2 of the vertical guide section is d2>0.3×D2 relative to the width D2 of the air passage on the side of the tank suction inlet. 25. A blower with a sound attenuating box as claimed in claim 22 or 23, wherein: The body sound absorbing material is integrally formed with the guide member. 26. A blower with a sound attenuating box according to claim 22 or 23, wherein, There is also a rectifying part, which is formed on the sound-absorbing part of the machine body, and has a vertical rectifying section and a horizontal rectifying section, The rectifying member has a height dimension smaller than the height dimension of the inside of the body, narrows the air path on the side of the tank suction port toward the discharge port side, and narrows the air passage on the side of the tongue of the double-suction centrifugal blower from the plane of the body on the tongue side of the double-suction centrifugal blower. The air path on the side of the box suction inlet is narrowed from the side, and it is arranged parallel to the box side plate in the vicinity of the tongue portion of the box side plate, The vertical rectification section is arranged in front of the tank suction inlet, and is formed perpendicular to the airflow direction passing through the side air path of the tank suction inlet, The horizontal rectification section is formed parallel to the airflow direction passing through the air passage on the side of the tank suction inlet, The thickness dimension d1 of the horizontal straightening section is d1>d2 relative to the thickness dimension d2 of the vertical guiding section. 27. A blower with sound attenuating box according to claim 26, wherein: The body sound absorbing material is integrally formed with the rectifying member and the guide member. 28. The blower with sound attenuating box of claim 26, wherein: The body sound absorbing material is integrally formed with either the rectification member or the guide member. 29. A blower with a sound-absorbing box, wherein: A box-shaped body, which has a body suction port and a body blowout port opposite to the body suction port; A single-suction centrifugal blower, which is installed inside the body, and has a discharge port, a spiral scroll, a case suction port, a fan case with a case side plate provided with the case suction port on the side, and a motor. . A single-suction impeller driven by the motor; A tank suction inlet-side air path formed between the body suction inlet and the tank suction inlet by the inner surface of the body facing the tank suction inlet and the single-suction centrifugal blower In the double-teaming space; a body sound absorbing member disposed between the tank suction inlet and the inner surface of the body; a guide member formed on the body sound absorbing member and having a vertical guide section, The guide member has substantially the same height as the inside of the body, narrows the air passage on the side of the tank suction port toward the discharge port side, and is disposed parallel to the tank side plate and faces each other. , The vertical guide section is arranged in front of the tank suction inlet, and is formed perpendicularly to the airflow direction passing through the side air passage of the tank suction inlet.

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