JP2007247548A - Blower device, air conditioning device and humidifying unit provided with same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce operation noise and reduce required shaft power. <P>SOLUTION: The blower device is provided with a shroud-less type centrifugal impeller 1 composed of a main plate 2 having a rotary shaft 4a of a motor 4 connected to an axial center part and a plurality of retreating aerofoil shape blades 3 erectly provided on an outer circumference part of the main plate 2 at a predetermined interval in a circumference direction, and a casing 8 surrounding the centrifugal impeller 1 and including an air intake port 6 and an air blow out port 7, and has a bell-mouth 5 provided in the air intake port 6. A deflection means A deflecting blow out flow toward the bell-mouth 5 side is provided in an outer circumference side of the centrifugal impeller 1. Outlet flow of the blades 3 (in other words, blow out flow) is deflected to an axial direction to make the same direct to the bell-mouth 5 side. Strong stable circulation flow f2 circulating through a part between the bell-mouth 5 and the centrifugal impeller 1 is formed in the outlet side of the centrifugal impeller 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a blower device, an air conditioner including the blower device, and a humidifying unit.

  Blower with limited axial height of mixed flow centrifugal diffuser (see Patent Document 1), or blower with U-turn flow path provided outside of main body composed of scroll and mixed flow diffuser incorporating centrifugal blower (See Patent Document 2) has already been proposed.

Japanese Patent Application No. 2005-307369.

Japanese Patent Application No. 2006-6356.

  However, in the case of the air blower disclosed in the above-mentioned Patent Document 1, when the air outlet is adapted to face the centrifugal blowing direction of the centrifugal impeller, it shows good performance. In the case of the blower disclosed in the above-mentioned Patent Document 2, there is a problem that the performance is not always good when blowing out with a large deflection toward the mouse side (axially forward or radial direction). It blows out from the outlet through the U-turn flow path from the height, but the U-turn flow path is not axially symmetric and greatly increases in the bell mouth side (axially forward or radial direction) of the centrifugal impeller. When the air is deflected and blown out, the performance is not always good.Therefore, even if the air is blown out from the scroll outlet, the performance is not improved, and it is limited to special applications. That.

  The present invention has been made in view of the above points, and an object of the present invention is to reduce driving noise and required shaft power.

  In the present invention, as a first means for solving the above-described problems, a main plate 2 in which the rotating shaft 4a of the motor 4 is connected to the shaft center portion and a large number of the outer periphery of the main plate 2 are set up at predetermined intervals in the circumferential direction. A shroudless type centrifugal impeller 1 composed of the blades 3, 3, and the like, and a casing 8 that surrounds the centrifugal impeller 1 and has an air inlet 6 and an air outlet 7. In the air blower in which the bell mouth 5 is disposed in the air suction port 6, a deflection means A for deflecting the blown flow toward the bell mouth 5 side is provided on the outer peripheral side of the centrifugal impeller 1. Yes.

With the above configuration, the outlet flow of the blades 3, 3... (In other words, the blowout flow) is deflected in the axial direction so as to be directed toward the bell mouth 5, and the outlet blade of the centrifugal impeller 1 A strong and stable circulating flow f ₂ that circulates between the bell mouth 5 and the centrifugal impeller 1 is formed on the end side (due to the effective use of the vortex acceleration effect). As a result, the speed distribution of the blowout flow of the centrifugal impeller 1 is greatly improved, and the performance as a blower is improved (for example, the minimum specific noise level and the required shaft power can be reduced). . When the circulating flow f ₂ disappears, the outlet flow of the blades 3, 3,... Greatly drifts toward the main plate 2, and the performance is extremely deteriorated. If the number of blades 3, 3,... Is small (for example, about 10) and the inner diameter of the bellmouth 5 is small, the above-mentioned circulation flow is likely to disappear, but the number of blades 3, 3,. , 20 to 40) When the inner diameter of the bell mouth 5 is increased, good performance (for example, reduction of the minimum specific noise level, reduction of required shaft power) can be obtained.

  In the present invention, as a second means for solving the above-mentioned problem, in the air blower provided with the first means, the deflection means A includes the casing side plate 8c surrounding the blowout side of the centrifugal impeller 1. In such a configuration, the deflecting means A and the casing side plate 8c can be used together, and the number of parts can be reduced and the cost can be reduced.

In the present invention, as a third means for solving the above-mentioned problem, in the air blower provided with the first or second means, the axial tips of the blades 3, 3,. The ring body 9 having a predetermined width in the centrifugal direction can be attached to the part, and in such a case, from the blowing side of the centrifugal impeller 1 through the back side of the air suction port 6 in the bell mouth 5 becomes the circulating flow f ₂ sucked again into the centrifugal impeller 1 is effectively formed, drawn to the vane 3,3 ... tip side main air flow f ₁ through the vanes 3,3 ... is the circulating flow f ₂ As a result, the wind speed distribution at the exit of the blades 3, 3,... Is improved, so that aerodynamic performance can be improved and driving noise can be reduced.

  In the present invention, as a fourth means for solving the above problems, in the air blower provided with the third means, the position of the tip of the deflection means A in the axial direction is set in front of the ring body 9 or In this case, the outlet flow of the blades 3, 3,... By the deflecting means A (in other words, the blowing flow) is deflected in the axial direction toward the bell mouth 5 side. The action (in other words, generation of a U-turn flow) can be more effectively exhibited.

  In the present invention, as a fifth means for solving the above-mentioned problem, in the air blower provided with the first, second, third or fourth means, the air outlet 7 is connected to the casing side plate. It can also be formed at the position in front of 8c or at the outer peripheral portion of the casing front plate 8a. In such a configuration, the performance improvement effect increases.

  In the present invention, as a sixth means for solving the above-mentioned problem, in the air blower provided with the first, second, third, fourth or fifth means, the front side of the bell mouth 5 A suction channel 13 with a sleeve can also be attached to this, and in such a case, the suction direction of the suction flow to the centrifugal impeller 1 can be freely selected, and the degree of freedom in design is expanded.

In the present invention, as a seventh means for solving the above-described problem, in the air blower provided with the first, second, third, fourth, fifth or sixth means, the ring body 9 is provided. And the deflection means A can be set so that L = (0.2 to 0.4) D _{2 where} L is the outer diameter of the ring body 9 and D ₂ is the outer diameter of the ring body 9. When configured in this manner, the minimum specific noise level can be reduced. Note that <case of a 0.2D _2, the minimum specific noise level is greatly increased, L> L when the 0.4D _2, the outer diameter is too large device.

  In the present invention, as an eighth means for solving the above-described problems, a main plate 2 having a shaft 4 connected to the rotating shaft 4a of the motor 4 and a large number of the main plate 2 are provided upright at predetermined intervals in the circumferential direction. A centrifugal impeller 1 of a shroud type composed of the blades 3, 3,... And the shroud 20 covering the axial ends of the blades 3, 3. And a casing 8 having an air inlet 6 and an air outlet 7, and a blower device in which a bell mouth 5 is disposed in the air inlet 6. Deflection means A is provided to deflect the beam toward the bell mouth 5 side.

  By configuring as described above, the outlet flow of the blades 3, 3... (In other words, the blowing flow) is deflected in the axial direction so as to be directed to the bell mouth 5 side, and the shroud side of the centrifugal impeller 1 It is possible to suppress the separation of the blowout flow at.

  In the present invention, as a ninth means for solving the above-described problem, in the air blower provided with the eighth means, the deflection means A includes the casing side plate 8c surrounding the blowout side of the centrifugal impeller 1. In such a configuration, the deflecting means A and the casing side plate 8c can be used together, and the number of parts can be reduced and the cost can be reduced.

  In the present invention, as a tenth means for solving the above-mentioned problem, in the air blower provided with the eighth or ninth means, a sleeve suction passage 13 is provided on the front side of the bell mouth 5. In such a case, the suction direction of the suction flow into the centrifugal impeller 1 can be freely selected, and the degree of design freedom is expanded.

In the present invention, as an eleventh means for solving the above problem, in the air blower provided with the eighth, ninth or tenth means, the outer diameter of the centrifugal impeller 1 and the deflection means A L ′ and the outer diameter of the centrifugal impeller 1 as D ₂ ′, L ′ = (0.2 to 0.45) D ₂ ′, and so on. When configured in this manner, the minimum specific noise level can be reduced. Incidentally, '<case of a 0.2D _2', greatly increases the minimum specific noise level, L '> L when the 0.45D _2', the outer diameter is too large device.

  In the invention of the present application, as a twelfth means for solving the above-described problem, in the air conditioner in which the heat exchanger 15 and the blower X are arranged in the ventilation path 14 formed in the casing 8, As the blower X, a centrifugal blower provided with the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth or eleventh means is adopted. In the case of such a configuration, the effective function and effect of the centrifugal blower can be exhibited, which greatly contributes to the performance improvement and cost reduction as the air conditioner.

  In the present invention, as a thirteenth means for solving the above-described problem, in the humidifying unit in which the suction element 16 and the blower X are disposed in the ventilation path 14 formed in the casing 8, As the blower X, a centrifugal blower provided with the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth or eleventh means is employed. In the case of such a configuration, the effective function and effect possessed by the centrifugal blower can be exhibited, which greatly contributes to performance improvement and cost reduction as a humidifying unit.

  According to the first means of the present invention, the main plate 2 to which the rotation shaft 4a of the motor 4 is connected to the shaft center portion, and a large number of receding wing shapes standing on the outer peripheral portion of the main plate 2 at predetermined intervals in the circumferential direction. A shroudless type centrifugal impeller 1 comprising blades 3, 3... And a casing surrounding the centrifugal impeller 1 and having an air inlet 6 and an air outlet. In the air blower comprising the mouse 5, a deflection means A for deflecting the blown flow toward the bell mouth 5 is provided on the outer peripheral side of the centrifugal impeller 1, and the blades 3, 3,. The outlet flow (in other words, the blowing flow) is deflected in the axial direction so as to be directed toward the bell mouth 5, and passes between the bell mouth 5 and the centrifugal impeller 1 on the outlet blade end side of the centrifugal impeller 1. A strong and stable circulating flow that circulates Having a fast effect due to effectively tried out) manner, will be the velocity distribution of the outlet flow of the centrifugal impeller 1 is significantly improved, there is an effect that performance of the blower is improved.

  As in the second means of the present invention, in the air blower provided with the first means, the deflection means A can be constituted by a casing side plate surrounding the blowout side of the centrifugal impeller 1, and so on. In this case, the deflecting means A and the casing side plate can be used together, and the number of parts can be reduced and the cost can be reduced.

As in the third means of the present invention, in the air blower provided with the first or second means, a predetermined direction in the centrifugal direction is provided at the axial tip of the blades 3, 3,. A ring body 20 having a width can be provided, and in such a case, the centrifugal impeller 1 is sucked into the centrifugal impeller 1 again from the blowing side of the centrifugal impeller 1 through the back side of the air suction port 6 in the bell mouth 5. becomes the circulating flow f ₂ is effectively formed, are attracted to the blade 3, 3 ... front end side main air flow f ₁ through the vanes 3,3 ... is the circulating flow f _2, blade 3, 3 &・ The wind speed distribution at the exit of the can be improved, and aerodynamic performance can be improved and driving noise can be reduced.

  As in the fourth means of the present invention, in the blower provided with the third means, the position of the tip of the deflecting means A in the axial direction can be set in front of or near the ring body 20, In such a configuration, the action of deflecting the exit flow (in other words, the blow-out flow) of the blades 3, 3,. ) Can be more effectively exhibited.

  As in the fifth means of the present invention, in the air blower provided with the first, second, third or fourth means, the air outlet is located at a position or in front of the casing on the side plate of the casing. It can also form in the outer peripheral part in a board, and when comprised in that way, the production | generation of a U-turn flow becomes easy and the performance improvement effect increases.

  As in the sixth means of the present invention, in the blower provided with the first, second, third, fourth or fifth means, a suction passage with a sleeve is attached to the front side of the bell mouth 5. In such a case, the suction direction of the suction flow into the centrifugal impeller 1 can be freely selected, and the degree of design freedom is expanded.

As in the seventh means of the present invention, in the air blower provided with the first, second, third, fourth, fifth or sixth means, the distance between the ring body 9 and the deflection means A Is L, and the outer diameter of the ring body 20 is D ₂ , L = (0.2 to 0.4) D ₂ can be set. The level can be reduced.

  According to the eighth means of the present invention, the main plate 2 to which the rotating shaft 4a of the motor 4 is connected to the shaft center portion, and a large number of receding wing shapes standing on the outer peripheral portion of the main plate 2 at predetermined intervals in the circumferential direction. A centrifugal impeller 1 of a shroud type comprising the blades 3, 3,... And a shroud covering the axial ends of the blades 3, 3,. In a blower comprising a casing having a blower outlet and having a bell mouth 5 disposed in the air suction port 6, the blowing flow is directed toward the bell mouth 5 toward the outer peripheral side of the centrifugal impeller 1. Since the deflecting means A for deflecting is provided so that the outlet flow of the blades 3, 3,... (In other words, the blowing flow) is deflected in the axial direction toward the bell mouth 5 side, the centrifugal impeller Suppresses blow-off flow separation on the shroud side of 1 Will be capable of Rukoto, there is an effect that performance of the blower is improved.

  As in the ninth means of the present invention, in the air blower provided with the eighth means, the deflecting means A can be constituted by a casing side plate surrounding the blowout side of the centrifugal impeller 1, and so on. In this case, the deflecting means A and the casing side plate can be used together, and the number of parts can be reduced and the cost can be reduced.

  As in the tenth means of the present invention, in the air blower provided with the eighth or ninth means, a suction passage with a sleeve can be attached to the front side of the bell mouth 5 and configured as such. In this case, the suction direction of the suction flow into the centrifugal impeller 1 can be freely selected, and the degree of freedom in design is expanded.

As in the eleventh means of the present invention, in the air blower equipped with the eighth, ninth or tenth means, the distance between the outer diameter of the centrifugal impeller 1 and the deflection means A is L ′, When the outer diameter of the centrifugal impeller 1 is D ₂ ′, it can be set so that L ′ = (0.2 to 0.45) D ₂ ′. The level can be reduced.

  As in the twelfth means of the present invention, in the air conditioner in which the heat exchanger 15 and the blower X are disposed in the ventilation path 14 formed in the casing 8, the first blower X is the first blower. Centrifugal blowers equipped with second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth or eleventh means can also be employed, and so configured In this case, since the effective action and effect possessed by the centrifugal blower can be exhibited, it greatly contributes to the performance improvement and cost reduction as the air conditioner.

  As in the thirteenth means of the present invention, in the humidifying unit in which the adsorbing element 16 and the blower X are disposed in the ventilation path 14 formed in the casing 8, the first blower X is used as the blower X. Centrifugal blowers equipped with second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth or eleventh means can also be employed, and so configured In this case, since the effective action and effect possessed by the centrifugal blower can be exhibited, it greatly contributes to performance improvement and cost reduction as a humidifying unit.

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. First Embodiment FIGS. 1 and 2 show an air blower X _{1 according} to a first embodiment of the present invention.

As shown in FIGS. 1 and 2, the air blower X ₁ includes a disk-shaped main plate 2 having a shaft 4 connected to a rotating shaft 4 a of a motor 4, and a circumferential direction predetermined on an outer peripheral portion of the main plate 2. A shroudless type centrifugal impeller 1 including a plurality of blades 3, 3... Arranged at intervals, and a casing 8 surrounding the centrifugal impeller 1 and having an air inlet 6 and an air outlet 7. A bell mouth 5 having the air suction port 6 is disposed on the air suction side of the centrifugal impeller 1 (in other words, the casing front plate 8a).

As shown in FIG. 2, the centrifugal impeller 1 is a retracted blade type in which the outer diameter side end portion 3 b of each blade 3 is located behind the inner diameter side end portion 3 a in the rotational direction M of the impeller 1 (that is, Turbo fan type). Further, in the present embodiment, the inner diameter side height H ₂ of each blade 3 is made larger than the outer diameter side height H ₁ (that is, the axial end of each blade 3 is directed toward the outlet side. The shape is inclined to the main plate 2 side). Thus, if it is set as a backward wing | blade type | mold, since the ratio of the static pressure rise to the total pressure rise of the impeller 1 is large, a spiral scroll becomes unnecessary.

  A ring body 9 having a predetermined width in the centrifugal direction is attached to the axial tip of the blades 3, 3,. In the present embodiment, the ring body 9 is positioned on a line obtained by extending the axial end of each blade 3.

  The motor 4 is attached to a back plate 8 b in the casing 8. Reference numeral 21 denotes a bearing boss that pivotally supports the rotating shaft 4 a of the motor 4.

The inner diameter D ₀ of the air suction port 6 in the bell mouth 5 is set larger than the inner diameter D ₁ of the blades 3, 3. A circulation space S is formed on the back side (in other words, the outer peripheral side) of the bell mouth 5, and the bell mouth 5 passes through the tip of the ring body 9 from the blowing side of the impeller 1. The circulating flow f ₂ that is sucked into the impeller 1 again through the back side of the air suction port 6 is formed easily and reliably. As a result, the main air flow f ₁ through the vanes 3,3 ... are attracted to the blade 3, 3 ... front end side by the circulating flow f _2, an improved air speed distribution in the exit portion of the vanes 3,3 ..., It is possible to improve aerodynamic performance and reduce driving noise.

Further, in the blower X ₁ , deflecting means A for deflecting the blown flow toward the bell mouth 5 side is provided on the outer peripheral side of the centrifugal impeller 1. In the present embodiment, the deflecting means A is composed of a casing side plate 8 c that surrounds the blowing side of the centrifugal impeller 1. That is, the air outlet 7 is formed at a position before the casing side plate 8c. Accordingly, the position of the tip end in the axial direction of the deflecting means A (in other words, the air outlet 7 is located in front of or near the ring body 9.

  In the air blower configured as described above, the following operational effects are obtained.

That is, the outlet flow of the blades 3, 3,... (In other words, the outlet flow) is deflected in the axial direction so as to be directed to the bell mouth 5 side. A strong and stable circulation flow f ₂ (see FIG. 3) that circulates between the vehicle 1 and the vehicle 1 is formed (due to the effective use of the eddy current acceleration effect). As a result, the speed distribution of the blowout flow of the centrifugal impeller 1 is greatly improved, and the performance as a blower is improved (for example, the minimum specific noise level and the required shaft power can be reduced). . When the circulating flow f ₂ disappears, the outlet flow of the blades 3, 3,... Greatly drifts toward the main plate 2, and the performance is extremely deteriorated. Incidentally, small number of blades 3, 3 ... (for example, approximately 10 sheets), the inner diameter of the bell mouth 5 is small, but likely the circulating flow f ₂ disappears, many number of blades 3,3 ... When the inner diameter of the bell mouth 5 is increased (for example, 20 to 40 sheets), good performance (for example, reduction in minimum specific noise level and reduction in required shaft power) can be obtained.

  Moreover, in the present embodiment, since the deflection means A is constituted by the casing side plate 8c surrounding the blowout side of the centrifugal impeller 1, the deflection means A and the casing side plate 8c can be used together. The number of parts can be reduced and the cost can be reduced.

In addition, since the ring body 9 having a predetermined width in the centrifugal direction is attached to the tip end in the axial direction of the blades 3, 3... In the centrifugal impeller 1, A circulation flow f ₂ sucked into the centrifugal impeller 1 again through the back side of the air suction port 6 toward the mouse 5 is effectively formed, and the main air flow f ₁ passing through the blades 3, 3. There are attracted to the blade 3, 3 ... front end side by the circulating flow f _2, an improved air speed distribution in the exit portion of the vanes 3,3 ..., is possible to reduce the noise of improving the operating noise aerodynamic performance it can.

  Further, since the position of the tip of the deflecting means A in the axial direction is set to the front of the ring body 9 or the vicinity thereof, the outlet flow (in other words, the blow-out flow) of the blades 3, 3,. The action of deflecting in the axial direction on the side (in other words, generation of a U-turn flow) can be more effectively exhibited.

  Furthermore, since the air outlet 7 is formed at a position before the side plate 8c of the casing, the performance improvement effect is increased.

Incidentally, when the change in the minimum specific noise level (dBA) with respect to the distance between the ring body 9 and the casing side plate 8c as the deflection means A with respect to L was examined, the result shown in FIG. 4 was obtained. Here, it is the outer diameter of the ring member 9 and D _2.

This shows that the lowest specific noise level is reduced in the range of L = (0.2 to 0.4) D ₂ . This can be judged as a result of facilitating the generation of the U-turn flow. Note that <case of a 0.2D _2, the minimum specific noise level is greatly increased, L> L when the 0.4D _2, the outer diameter is too large device.

Second Embodiment FIG. 5 shows an air blower X _{2 according} to a second embodiment of the present invention.

  In this case, the air outlet 7 is formed on the outer peripheral portion of the front plate 8 a in the casing 8. If it does in this way, the air blower by which the blowing air flow was made forward is obtained.

  Since other configurations and operational effects are the same as those in the first embodiment, the description thereof is omitted.

Third Embodiment FIG. 6 shows an air blower X _{3 according} to a third embodiment of the present invention.

  In this case, the front plate 8 a of the casing 8 is formed with a recess 6 a that communicates with the air suction port 6 of the bell mouth 5. Further, the side plate 8 c of the casing 8 is formed with an air outlet passage 10 communicating with the air outlet 7. If it does in this way, a suction air flow will be guided and sucked by crevice 6a formed in casing front board 8a, a flow rate of suction air flow can be secured easily, and a blowing air flow is guided to blowing passage 10. As a result, the air is blown in the centrifugal direction, and the degree of freedom of the installation form of the blower is increased.

  Since other configurations and operational effects are the same as those in the first embodiment, the description thereof is omitted.

FIG. 7 shows an air conditioner Z ₁ using a blower X _{3 according} to a _third embodiment of the present invention.

In this case, the heat exchanger 15 and the blower X ₃ are disposed in the ventilation path 14 (in other words, in the recess 6a) of the air flow W formed in the casing 8, and the motor 4 is attached to the inner surface of the back plate 8b of the casing 8. Further, the main plate 2 in the centrifugal impeller 1 is formed with a recess 2 a for housing the motor 4. Reference numeral 11 is a suction grille, and 12 is an air filter. In this way, from where the effective operational effects possessed by the blower X ₃ can be exhibited, greatly contributes to performance improvement and cost reduction of the air conditioner Z _1.

Fourth Embodiment FIG. 8 shows an air blower X _{4 according} to a fourth embodiment of the present invention.

  In this case, a suction passage 13 with a sleeve is attached to the front side of the bell mouth 5. If it does in this way, the suction direction of the suction flow to the centrifugal impeller 1 can be freely selected, and the degree of design freedom increases.

  Since other configurations and operational effects are the same as those in the first embodiment, the description thereof is omitted.

FIG. 9 shows a humidifying unit Z ₂ using a blower X _{4 according} to the fourth embodiment of the present invention.

In this case, the inlet 13a of the armhole suction passage 13 is a ventilation path in the blower X _4, rotary suction element 16 is arranged. Reference numeral 17 denotes an electric heater for regenerating the adsorption element 16. In this air conditioner Z ₂ , after the outdoor air taken in from the outdoor air intake 18 is dehumidified in the process of passing through the adsorption element 16, the air intake of the blower X ₄ is passed through the suction passage 13 with a sleeve. 6 is sucked in and exhausted to the outdoor side through the air outlet 7. On the other hand, the outdoor air taken in from the outdoor air intake port 19 is humidified in the process of passing through the adsorption element 16 and blown out into the room as humidified air. That is, the humidifying unit Z ₂ is to act as a humidifier.

  Since other configurations and operational effects are the same as those in the first embodiment, the description thereof is omitted.

The fifth embodiment Figure 10 embodiment, the blowing device X ₅ according to the fifth embodiment of the present invention is shown.

In this case, the blower X ₅ includes a main plate 2 having a shaft center connected to the rotating shaft 4 a of the motor 4, and a plurality of receding blade-shaped blades 3 erected on the outer peripheral portion of the main plate 2 at predetermined intervals in the circumferential direction. , 3... And a shroud type centrifugal impeller 1 comprising a shroud 20 covering the axial ends of the blades 3, 3..., And surrounding the centrifugal impeller 1, and an air suction port 6 and an air blower And a casing having an outlet. The air outlet 7 is formed in the outer peripheral portion of the front plate 8 a in the casing 8. Further, the tip of the bell mouth 5 is inserted inward of the blades 3, 3. If it does in this way, the air blower by which the blowing air flow was made forward is obtained.

  By configuring as described above, the outlet flow of the blades 3, 3... (In other words, the blowing flow) is deflected in the axial direction so as to be directed to the bell mouth 5 side, and the shroud side of the centrifugal impeller 1 It is possible to suppress the separation of the blowout flow at.

Incidentally, when the change in the minimum specific noise level (dBA) with respect to the distance L ′ between the outer diameter of the centrifugal impeller 1 and the casing side plate 8c as the deflection means A was examined, the result shown in FIG. 11 was obtained. Here, the outer diameter of the centrifugal impeller 1 is D ₂ ′.

This shows that the minimum specific noise level is reduced in the range of L ′ = (0.2 to 0.45) D ₂ ′. This can be judged as a result of facilitating the generation of the U-turn flow. Note that <'If the lowest ratio the noise level is significantly _{increased, L 0.45D 2 0.2D 2>'} L when the outer diameter is too large device.

  Since other configurations and operational effects are the same as those in the first embodiment, the description thereof is omitted.

Incidentally, the centrifugal blower X ₅ according to this embodiment also, it can be incorporated in the air conditioning apparatus is a matter of course. Of course, the same effect can be obtained with a spiral casing.

It is a longitudinal sectional view of a blower X ₁ according to the first embodiment of the present invention. It is a front view of the blower X ₁ according to the first embodiment of the present invention. It is III-III expanded sectional drawing of FIG. It is a characteristic diagram showing changes in the minimum specific noise level with respect to the distance L of the first ring member in the blowing device X ₁ according to the embodiment of the deflecting means A (casing side plate) of the present invention. It is a longitudinal sectional view of a blowing device X ₂ according to the second embodiment of the present invention. It is a third longitudinal section view of a blower X ₃ according to the embodiment of the present invention. It is a longitudinal sectional view of an air conditioner Z ₁ using such blower X ₃ to the third embodiment of the present invention. It is a fourth longitudinal section of the air blower X ₄ according to an embodiment of the present invention. It is a longitudinal sectional view of the humidifying unit Z ₂ using such blowing device X ₄ to the fourth embodiment of the present invention. It is a longitudinal sectional view of a blower X ₅ according to the fifth embodiment of the present invention. It is a characteristic diagram showing changes in the minimum specific noise level with respect to the distance L 'between the ring member and the deflecting means A (casing side plate) in blower X ₅ according to the fifth embodiment of the present invention.

Explanation of symbols

1 is a centrifugal impeller 2 is a main plate 3 is a blade 4 is a motor 4a is a rotating shaft 5 is a bell mouth 6 is an air inlet 7 is an air outlet 8 is a casing 8a is a casing front plate 8c is a casing side plate 9 is a ring body 13 Suction channel with sleeve 14 Ventilation channel 15 Heat exchanger 20 Shroud A Deflection means X Blower

Claims (13)

A main plate (2) to which the rotating shaft (4a) of the motor (4) is connected to the shaft center portion, and a plurality of receding blade-shaped blades (3 ), (3)... A shroudless type centrifugal impeller (1), and a casing (8) surrounding the centrifugal impeller (1) and having an air inlet (6) and an air outlet (7) ), And the air suction port (6) is provided with a bell mouth (5), and the blowout flow is provided on the outer peripheral side of the centrifugal impeller (1). A blower characterized in that it is provided with deflecting means (A) for deflecting toward the mouse (5) side. The blower according to claim 1, wherein the deflecting means (A) is constituted by a casing side plate (8c) surrounding a blowing side of the centrifugal impeller (1). 2. A ring body (9) having a predetermined width in the centrifugal direction is attached to the distal end in the axial direction of the blades (3), (3),... In the centrifugal impeller (1). The air blower of any one of 2 and 2. The blower according to claim 3, wherein the position of the tip of the deflecting means (A) in the axial direction is set in front of or in the vicinity of the ring body (9). The said air blower outlet (7) was formed in the outer peripheral part in the position from the front in the said casing side board (8a), or a casing front board (8a), The any one of Claim 1, 2, 3 and 4 characterized by the above-mentioned. Item blower. The blower according to any one of claims 1, 2, 3, 4 and 5, wherein a suction passage with a sleeve (13) is provided on the front side of the bell mouth (5). When the distance between the ring member (9) and said deflecting means (A) L, the ring member outer diameter (20) as a D _2, becomes L = (0.2 to 0.4) D ₂ The blower according to any one of claims 3, 4, 5 and 6, wherein the blower is set as described above. A main plate (2) to which the rotating shaft (4a) of the motor (4) is connected to the shaft center portion, and a plurality of receding blade-shaped blades (3) erected on the outer peripheral portion of the main plate (2) at predetermined intervals in the circumferential direction. ), (3)... And a shroud-equipped centrifugal impeller (1) comprising the shroud (20) covering the axial ends of the blades (3), (3). A casing (8) that surrounds (1) and has an air inlet (6) and an air outlet (7), and the air inlet (6) is provided with a bell mouth (5). A blower characterized in that a deflection means (A) for deflecting the blown flow toward the bell mouth (5) is provided on the outer peripheral side of the centrifugal impeller (1). . The blower according to claim 8, wherein the deflecting means (A) is constituted by a casing side plate (8c) surrounding a blowing side of the centrifugal impeller (1). The blower according to any one of claims 8 and 9, wherein a suction passage with a sleeve (13) is provided on the front side of the bell mouth (5). When the distance between the outer diameter of the centrifugal impeller (1) and the deflection means (A) is L 'and the outer diameter of the centrifugal impeller (1) is D ₂ ', L '= (0.2 to 0.45) blower of any one of claims 8, 9 and 10, characterized in that set so that D ₂ '. An air conditioner in which a heat exchanger (15) and a blower (X) are arranged in a ventilation path (14) formed in a casing (8), and the blower (X) An air conditioner using the air blower according to any one of claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11. It is a humidification unit which arrange | positions an adsorption | suction element (16) and an air blower (X) in the ventilation path (14) formed in the casing (8), Comprising: As said air blower (X), Claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11. The humidification unit characterized by adopting the air blower described in any one of the above.

Images