WO2018131183A1

WO2018131183A1 - Blower and air conditioning device

Info

Publication number: WO2018131183A1
Application number: PCT/JP2017/018192
Authority: WO
Inventors: 翔太森川; 智哉福井; 敬英田所; 健一迫田
Original assignee: 三菱電機株式会社
Priority date: 2017-01-10
Filing date: 2017-05-15
Publication date: 2018-07-19
Also published as: JP6685433B2; JPWO2018131183A1

Abstract

This blower is provided with: a motor; an impeller connected to the rotating shaft of the motor and having rotating blades; a casing provided surrounding the impeller and having a circular cylinder section which forms a passage for an air flow in the direction in which the rotating shaft extends; a motor affixation section disposed within the casing at a position downstream of the impeller and supporting the motor; a plurality of stator blades extending in the radial direction of the rotating shaft from the motor affixation section and connected to the circular cylinder section of the casing; and connecting auxiliary blades for either connecting adjacent stator blades, or connecting the stator blades and the casing. The connecting auxiliary blades have a radial cross-section formed such that the connecting auxiliary blades tilt away from the rotating shaft as the connecting auxiliary blades extends from the upstream side toward the downstream side of the air flow.

Description

Blower and air conditioner

The present invention relates to a blower provided with a plurality of stationary blades and an air conditioner equipped with the blower.

Conventionally, as an air blower provided with a plurality of stationary blades, for example, there is an axial blower disclosed in Patent Document 1. The axial blower of Patent Document 1 is provided with a motor, an impeller having a moving blade fixed to a rotating shaft of the motor, and an impeller so as to surround the impeller, and a flow path of airflow along the axial direction of the rotating shaft is provided. A cylindrical casing to be formed. A motor fixing portion to which the motor is fixed and a plurality of stationary blades that extend from the motor fixing portion in the radial direction of the rotating shaft and are connected to the casing are disposed in the casing. The stationary blade rectifies the component swirling in the circumferential direction of the airflow that has passed through the impeller into an axial flow to increase the axial airflow. Moreover, the axial-flow fan of Patent Document 1 includes a connection auxiliary blade that connects the stationary blades at the central portion in the radial direction, and increases the strength of the motor fixing portion by connecting the stationary blades to each other to improve the shock resistance of the stationary blade. I try to improve the sex.

JP 2008-261280 A

The velocity component of the airflow that has passed through the impeller includes a velocity component in the radial direction due to centrifugal force in addition to a velocity component parallel to the rotation axis and a velocity component in the rotation direction of the impeller. The blower disclosed in Patent Document 1 has a problem in that an airflow having a velocity component in the radial direction collides with the connecting auxiliary blades to disturb the flow, resulting in deterioration of the blowing performance.

This invention is made in view of such a point, and the air blower and air which can suppress the fall of the air blower performance which arises when the airflow which has the radial direction speed component which passed the impeller collides with a connection auxiliary | assistant wing | blade. It aims at providing a harmony device.

The blower according to the present invention includes a motor, an impeller having a moving blade connected to a rotating shaft of the motor, and a cylindrical portion that is provided so as to surround the impeller and forms a flow path of airflow along the rotating shaft direction. A casing, a motor fixing portion disposed downstream of the impeller in the casing and supporting the motor, and a plurality of stationary blades extending from the motor fixing portion in the radial direction of the rotating shaft and coupled to the cylindrical portion of the casing And adjacent auxiliary vanes or a connecting auxiliary vane that connects the vane and the casing, and the connecting auxiliary vane has a radial cross section from the rotating shaft as it goes from the upstream side to the downstream side of the airflow. It is inclined to leave.

The air conditioner according to the present invention includes the above blower.

According to the present invention, since the airflow having the radial speed component that has passed through the impeller is converted into the airflow of the axial speed component by the collision with the connecting auxiliary blade, the performance of the blower produced by the collision with the connecting auxiliary blade is improved. The decrease can be suppressed.

It is a schematic sectional drawing of the air blower concerning Embodiment 1 of this invention. It is a top view of the state which removed the impeller from the air blower concerning Embodiment 1 of this invention. It is the perspective view which looked at the state which removed the impeller from the air blower concerning Embodiment 1 of this invention from the upstream. It is the figure which expand | deployed planarly the cylindrical cross section of the air blower in the radial position where the connection auxiliary blade of the air blower of FIG. 1 is arrange | positioned, and looked at the expansion | deployment surface from the radial direction outer side. It is explanatory drawing of the angle of attack of the connection auxiliary | assistant wing | blade of FIG. It is a top view of the state which removed the impeller from the air blower concerning Embodiment 2 of this invention. It is the perspective view which looked at the state which removed the impeller from the air blower concerning Embodiment 2 of this invention from the upstream. It is the perspective view which looked at the stationary blade and connection auxiliary blade of FIG. 6 from the angle different from FIG. It is the top view which looked at the state which removed the impeller from the air blower concerning Embodiment 3 of this invention from the upstream. It is a figure which shows the relationship between r and (alpha) in the air blower concerning Embodiment 3 of this invention. It is the perspective view which looked at the state which removed the impeller from the air blower concerning Embodiment 4 of this invention from the upstream. It is the perspective view which looked at the stationary blade and connection auxiliary blade of FIG. 11 from the angle different from FIG. It is a top view of the state which removed the impeller from the air blower concerning Embodiment 5 of this invention. It is a schematic longitudinal cross-sectional view which shows an example of the air conditioning apparatus which concerns on Embodiment 6 of this invention.

Embodiment 1 FIG.
FIG. 1 is a schematic cross-sectional view of a blower according to Embodiment 1 of the present invention.
The blower 100 according to the first embodiment is an axial flow fan, a mixed flow blower, or the like, and here, an axial flow blower will be described as an example. The blower 100 takes in air from the upper side of FIG. 1 and sends it out to generate an airflow in the direction of the rotation axis O. In the following description, “upper” and “lower” are based on FIG.

The blower 100 includes an impeller 1 and a casing 10 disposed with a predetermined gap from the impeller 1 provided so as to surround the impeller. That is, the impeller 1 is housed in the casing 10. The impeller 1 includes a cylindrical boss portion 2 whose upper end opening is closed, and a moving blade 3 formed to extend radially outward from the outer peripheral surface of the boss portion 2. A shaft hole 2 a for the motor 20 that rotates the impeller 1 is formed at the center of the boss portion 2.

The casing 10 includes a cylindrical portion 10a and a flange portion 10b that protrudes radially outward from the upper end opening of the cylindrical portion 10a. The inside of the cylindrical portion 10a becomes a flow path for airflow generated when the impeller 1 rotates about the rotation axis O. A motor fixing portion 12 is disposed at the center of the cylindrical portion 10a. The casing 10 has a plurality of stationary blades 13 extending from the motor fixing portion 12 in the radial direction of the rotation axis O and coupled to the casing 10, and a plurality of couplings coupling the adjacent stationary blades 13 to each other in the circumferential direction. An auxiliary wing 14 is provided.

The stationary blade 13 has a function of converting a circumferential velocity component of the airflow into a static axis velocity component. The adjacent stationary blades 13 are connected to each other by the connection auxiliary blades 14, so that the strength of the motor fixing portion 12 can be improved and damage to the stationary blades 13 due to vibration can be suppressed. .

The motor fixing portion 12 has a cylindrical shape with a lower end opening closed, and the bottom surface side of the motor 20 is accommodated in the motor fixing portion 12. Then, the shaft 21 of the motor 20 protrudes through the shaft hole 2a of the boss portion 2 of the impeller 1, and the protruding portion is tightened with a nut (not shown), so that the impeller 1 and the motor 20 are fixed. Yes. The impeller 1 rotates clockwise around the rotation axis O of the shaft 21 as viewed from the upstream side by the rotation of the motor 20.

In the blower 100, the impeller 1 rotates around the rotation axis O by the driving force of the motor 20, and air is taken in from the upper side and sent out from the lower side by the rotation of the impeller 1. At this time, the airflow that passes through the impeller 1 and flows into the stationary blade 13 and the connection auxiliary blade 14 has a circumferential velocity component. This circumferential velocity component is converted into an axial velocity component by the stationary blade 13 so that the blowing performance of the blower 100 is improved.

FIG. 2 is a plan view showing a state in which the impeller is removed from the blower according to Embodiment 1 of the present invention. FIG. 3 is a perspective view of the state where the impeller is removed from the blower according to Embodiment 1 of the present invention, as viewed from the upstream side. FIG. 4 is a diagram in which a cylindrical cross section of the blower at a radial position where the connection auxiliary blades of the blower of FIG. 1 are arranged is developed in a plane, and the developed surface is viewed from the outside in the radial direction. Hereinafter, the configurations of the stationary blade 13 and the auxiliary connecting blade 14 will be described with reference to FIGS. Here, for convenience of explanation, of the two adjacent stationary blades 13, the stationary blade 13 on the leading end side in the rotational direction of the impeller 1 is replaced with the stationary blade 13 -A as necessary, and the stationary blade 13 on the rear end side in the rotational direction. The blade 13 is distinguished as a stationary blade 13-B.

In FIG. 2, the rotor blade 3 rotates clockwise. A plurality of stationary blades 13 are formed radially around the rotation axis O between the motor fixing portion 12 and the cylindrical portion 10a immediately downstream of the moving blade 3. When the casing 10 is viewed in plan as shown in FIG. 2, the stationary blade 13 has a shape that is convexly curved in the rotational direction of the impeller 1. That is, when viewed at a rotation angle about the rotation axis O, the intermediate portion of the stationary blade 13 is a connection portion between the stationary blade 13 and the motor fixing portion 12, and a connection portion between the stationary blade 13 and the cylindrical portion 10a. Compared with both, it exists in the rotation angle position advanced in the rotation direction. That is, the rotation angle position advanced in the rotation direction is a position rotated clockwise in FIG.

Further, in FIG. 4, the moving blade 3 rotates from right to left. Therefore, the left side of FIG. 4 advances at the rotation angle. 4 is the direction of the rotation axis O, and the moving blade 3 and the stationary blade 13 are inclined with respect to the direction of the rotation axis O when viewed from the outside in the radial direction. Specifically, the rotor blade 3 is inclined so that the rotation angle is advanced on the upper side and the rotation angle is delayed on the lower side. For this reason, when the moving blade 3 rotates, wind is generated from the top to the bottom.

On the other hand, the stationary blade 13 is inclined so that the upper side has a delayed rotation angle and the lower side has an advanced rotation angle. Further, the stationary blade 13 is disposed to be inclined with respect to the direction of the rotation axis O so that the upper side of the connection surface with the motor fixing portion 12 is on the upstream side in the rotational direction with respect to the lower side. That is, the stationary blade 13 is inclined to the opposite side to the moving blade 3 with respect to the rotation axis O direction. The moving blade 3 not only sends wind from the top to the bottom in FIG. 4, but also generates an airflow in the rotational direction from right to left, that is, in the circumferential velocity component in FIG. The stationary blade 13 on the downstream side of the moving blade 3 is inclined in the direction opposite to that of the moving blade 3, and the shape of the stationary blade 13 approaches parallel to the rotation axis O from the upstream side to the downstream side. It has a shape. For this reason, the circumferential velocity component of the airflow generated by the moving blade 3 is converted into an axial component by the shape of the downstream stationary blade 13 and blown out.

The auxiliary connecting blade 14 has a radial center between the stationary blade 13-A and the stationary blade 13-B, the negative pressure surface 13b side of the stationary blade 13-A and the pressure surface 13a side of the stationary blade 13-B. It is connected by part. Here, the pressure surface 13a is a surface that pushes the airflow during rotation, and the negative pressure surface 13b is a surface on the back side of the pressure surface 13a. Each of the auxiliary connecting blades 14 is formed of a substantially rectangular member, has a shape curved in a convex manner outward in the radial direction in both the longitudinal direction and the lateral direction, and is arranged concentrically around the rotation axis O. Yes. Further, the height of the connection auxiliary blade 14 in the direction of the rotation axis O is set to be the same as the height of the stationary blade 13 in the direction of the rotation axis O.

Here, as a characteristic configuration of the first embodiment, the connection auxiliary blade 14 is inclined so as to be separated from the rotation axis O toward the downstream direction of the airflow. In other words, the connection auxiliary blade 14 has an angle of attack with respect to the radial velocity component of the airflow. That is, as shown in FIG. 1 which is a cross section in the radial direction, the auxiliary connecting blade 14 is close to the rotation axis O on the upper upstream side in FIG. 1 and farther from the rotation axis O on the lower downstream side in FIG.

FIG. 5 is an explanatory diagram of the angle of attack of the connection auxiliary wing of FIG. 1.
As shown in FIG. 5, the connecting auxiliary blade 14 has an angle of attack θ with respect to the total speed component 103 of the radial speed component 101 and the axial speed component 102 of the impeller 1. For this reason, the connection auxiliary blade 14 has a function as a stationary blade that converts the radial velocity component of the airflow into the axial velocity component.

The velocity component of the airflow that has passed through the impeller 1 includes the following components. That is, in addition to the velocity component in the axial direction parallel to the rotation axis O and the velocity component in the circumferential direction of the impeller 1, there is a velocity component in the radial direction toward the radially outer side. In the structure of the casing 10 according to the first embodiment, since the connecting auxiliary blade 14 is disposed between the stationary blade 13-A and the stationary blade 13-B, the velocity component in the radial direction that has passed through the impeller 1 is reduced. The airflow which has collides with the connection auxiliary blade 14.

Here, although the connection auxiliary wing is provided in the prior art, the inclination is opposite to that of the connection auxiliary wing 14 of the first embodiment. For this reason, in the connection auxiliary wing of the prior art, the airflow of the axial velocity component is converted into the velocity component inside the radius by the connection auxiliary wing, but since the radial velocity component collides with the connection auxiliary wing, the axial velocity component It cannot be converted into a component and is lost. On the other hand, the connection auxiliary wing 14 of the first embodiment is inclined so as to be separated from the rotation axis O toward the downstream direction of the airflow as described above, and has an angle of attack θ. For this reason, the airflow of the radial direction velocity component colliding with the connection auxiliary wing 14 is converted into the airflow of the axial direction velocity component, thereby increasing the axial direction velocity component and improving the blowing performance of the blower 100. .

Further, the stationary blade 13 needs to have strength because it is required to support the heavy motor 20. Here, by connecting the stationary blade 13-A and the stationary blade 13-B with the coupling auxiliary blade 14, the strength of the stationary blade 13 is increased. Therefore, it is possible to prevent the stationary blade 13 that supports the motor fixing portion 12 from being damaged by the vibration generated when the impeller 1 is rotationally driven.

Embodiment 2. FIG.
In the first embodiment, the radius from the rotation axis O of each connecting portion of the connection auxiliary blade 14 with each of the stationary blade 13-A and the stator blade 13-B, in other words, both ends in the longitudinal direction of the connection auxiliary blade 14 is described. The directional positions were the same. On the other hand, in the second embodiment, the same position is different from each other. In the following, the second embodiment will be described focusing on the differences from the first embodiment.

FIG. 6 is a plan view of a state where the impeller is removed from the blower according to Embodiment 2 of the present invention. FIG. 7: is the perspective view which looked at the state which removed the impeller from the air blower concerning Embodiment 2 of this invention from the upstream. FIG. 8 is a perspective view of the stationary blade and the connecting auxiliary blade of FIG. 6 viewed from an angle different from that of FIG.

As shown in FIGS. 6 to 8, the connecting auxiliary blade 14A according to the second embodiment is the end on the leading end side in the rotational direction among both ends connected to the stationary blade 13-A and the stationary blade 13-B. The portion 14Aa is connected to the stationary blade 13-A closer to the rotational axis in the radial direction than the end portion 14Ab on the rear end side in the rotational direction. More specifically, the end portion 14Aa in the rotational direction of the connection auxiliary blade 14A is connected to the center portion in the radial direction of the suction surface 13b of the stationary blade 13-A, and the end portion 14Ab in the rotational direction at the rear end side. Is connected to the radially outer peripheral portion of the pressure surface 13a of the stationary blade 13-B. The heights of both ends 14Aa and 14Ab in the longitudinal direction of the connection auxiliary blade 14A in the direction of the rotation axis O are the same as the heights of the stationary blade 13-A and the stationary blade 13-B at the connection position. Further, the connecting auxiliary blade 14A has a convex shape outward in the radial direction.

In the first embodiment, the connecting auxiliary blade 14 is formed in a concentric circular arc shape with respect to the rotation axis O, and the radial position from the rotation axis O is the same at any position in the circumferential direction. For this reason, the radial velocity component inside the radial position where the connecting auxiliary blade 14 is disposed can be converted into the axial velocity component, but the radial velocity component outside the radial position is outside the axial velocity component. Can not be converted. On the other hand, in the second embodiment, the positions in the radial direction from the rotation axis O of the both ends in the longitudinal direction of the connection auxiliary blade 14A are different from each other. For this reason, the radial speed component of the impeller 1 can be converted into the axial speed component in a wide radial range. For this reason, compared with Embodiment 1, the ventilation performance of the air blower 100 can be improved.

Embodiment 3 FIG.
In the third embodiment, the curved shape of the connection auxiliary wing 14 of the second embodiment is specified. In the following, the third embodiment will be described focusing on the differences from the second embodiment.

FIG. 9 is a plan view of the state in which the impeller is removed from the blower according to Embodiment 3 of the present invention as viewed from the upstream side. FIG. 10 is a diagram showing the relationship between r and α in the blower according to Embodiment 3 of the present invention. 9 and 10, r is a distance between “a certain position P on the connection auxiliary blade 14 </ b> B” and “the rotation axis O”. t is “the tangent of the outer surface of the auxiliary connecting blade 14B at the position P”. α is an angle formed by “a line connecting the position P and the rotation axis O” and “tangent t”. r0 is the distance between the “connection position of the connection auxiliary blade 14B and the stationary blade 13-A” and the “rotary axis O”. r1 is the distance between the “connection position of the connection auxiliary blade 14B and the stationary blade 13-B” and the “rotary axis O”.

In the connection auxiliary blade 14B of the third embodiment shown in FIG. 9, the angle α is constant from the connection position with the stationary blade 13-A to the connection position with the stationary blade 13-B as shown by the straight line 104 in FIG. It has a curved shape. Further, as shown by the straight line 105 in FIG. 10, the connection auxiliary blade 14B is curved so that the angle α decreases from the connection position with the stationary blade 13-A to the connection position with the stationary blade 13-B. Also good. In other words, the connecting auxiliary blade 14B has an angle α formed by “a tangent t at each position P in the longitudinal direction on the outer surface of the connecting auxiliary blade 14B” and “a line connecting the position P and the rotation axis O”. The same or a smaller configuration toward the radially outer side.

With this configuration, the same effects as those of the second embodiment can be obtained, and the following effects can be obtained. That is, by making the connecting auxiliary blade 14B have the above-described curved shape, when the rear edge of the impeller 1 passes the upstream side of the connecting auxiliary blade 14, the outer peripheral end 14Ab to the inner peripheral end 14Aa. Gradually interfering with. For this reason, the area where the axial velocity component of the air current collides with the connection auxiliary blade 14 in a single time is reduced, and the time for the rear edge of the impeller 1 to pass through the connection auxiliary blade 14 is also increased. Thereby, quietness and ventilation performance can be improved by reducing the amount of time change and the absolute value of the pressure field received by the impeller 1.

Embodiment 4 FIG.
In the fourth embodiment, the shape of the connection auxiliary wing 14A of the second embodiment is changed. Hereinafter, the difference between the fourth embodiment and the second embodiment will be mainly described.

FIG. 11: is the perspective view which looked at the state which removed the impeller from the air blower concerning Embodiment 4 of this invention from the upstream. 12 is a perspective view of the stationary blade and the connecting auxiliary blade of FIG. 11 viewed from an angle different from that of FIG.
The connection auxiliary wing 14A of the second embodiment is formed in a substantially rectangular shape. However, the connection auxiliary wing 14C of the fourth embodiment is shortened as the height in the rotation axis direction goes radially outward. . And the upstream end surface 14a of the connection auxiliary blade 14C in the rotation axis direction is an inclined surface that inclines toward the downstream side toward the outer side in the radial direction.

The connecting positions of the both ends of the connecting auxiliary blade 14C in the longitudinal direction with respect to the stationary blade 13-A and the stationary blade 13-B are the same as in the second embodiment. That is, among the both ends in the longitudinal direction of the connection auxiliary wing 14C, the end 14Ca on the tip side in the rotation direction is connected to the center in the radial direction of the negative pressure surface 13b of the stationary blade 13-A. On the other hand, the end 14Cb on the rear end side in the rotational direction of the both ends in the longitudinal direction of the auxiliary connecting blade 14C is the outer peripheral portion in the radial direction of the pressure surface 13a of the stationary blade 13-B (the portion surrounded by the dotted line in FIG. 12). ). Further, although the connection auxiliary wing 14C has a smaller area than the connection auxiliary wing 14A of the second embodiment, the connection auxiliary wing 14C has a sufficient area for ensuring the strength, and the same strength as that of the first embodiment is ensured. Yes.

With this configuration, the same effect as in the second embodiment can be obtained, and the area of the outer side in the radial direction of the auxiliary connecting blade 14C can be reduced by colliding with the auxiliary connecting blade 14C as compared with the second embodiment. Less airflow. Therefore, Embodiment 4 can prevent a reduction in the blowing performance of the blower 100 and improve the blowing performance while ensuring the same strength as that of Embodiment 1.

11 and 12, the upstream end surface 14a in the rotational axis direction of the auxiliary connecting blade 14C is an inclined surface that is inclined downstream as it goes outward in the radial direction. However, the configuration is limited to this configuration. Absent. That is, the end surface on the downstream side in the rotation axis direction of the connection auxiliary blade 14C may be an inclined surface that inclines toward the upstream side toward the outer side in the radial direction. In short, the connection auxiliary wing 14C of the fourth embodiment only needs to be shorter as the height in the direction of the rotation axis goes outward in the radial direction.

Also, a configuration in which the fourth embodiment is combined with the fourth embodiment may be adopted. In other words, the curved shape of the connecting auxiliary wing 14C may be a shape that satisfies the relationship of the straight line 104 or the straight line 105 of FIG.

Embodiment 5 FIG.
In the fifth embodiment, the connection point of the connection auxiliary wing 14C of the fourth embodiment is changed. Hereinafter, the fifth embodiment will be described with a focus on differences from the fourth embodiment.

FIG. 13: is a top view of the state which removed the impeller from the air blower concerning Embodiment 5 of this invention.
The connection auxiliary wing 14C of the above-described fourth embodiment connects the middle portions of the two adjacent stationary blades 13 in the radial direction. That is, the connecting auxiliary blade 14C connects two adjacent stationary blades 13 to each other. On the other hand, in the connection auxiliary wing 14D of the fifth embodiment, the end 14Db on the rear end side in the rotation direction among the both ends of the connection auxiliary wing 14D is connected to the cylindrical portion 10a of the casing 10. The end portion 14Da on the front end side in the rotational direction of the connection auxiliary blade 14D is in the middle of the radial direction of the stationary blade 13-A on the front side in the rotational direction among the two adjacent stationary blades as in the fourth embodiment. Connected.

The position where the end portion 14Db is connected to the casing 10 is between two connection points 13c and 13d where the two stationary blades 13 are connected to the casing 10, respectively. In particular, the auxiliary connecting blade 14D is connected to the casing 10 at a position closer to the connecting portion 13d of the stationary blade 13-B on the rear side in the rotational direction than the middle of the two connecting portions 13c and 13d. Yes.

In this way, as in the fourth embodiment, since the auxiliary connecting blade 14D exists between the two stationary blades 13 in the circumferential direction, most of the radial components are converted into the axial direction. effective. Moreover, since the connection auxiliary blade 14b is connected to the casing 10, the effect of reinforcing the stationary blade 13 is great.

Further, when the casing 10, the stationary blade 13, and the auxiliary connecting blade 14 are integrally manufactured by resin molding using a mold, the end portion 14Cb portion of the auxiliary connecting blade 14C is used in the structure of the fourth embodiment shown in FIG. In this case, the undercut process is performed. On the other hand, in the fifth embodiment, since the end portion 14Db of the coupling auxiliary wing 14 is fixed to the casing 10, the undercut processing portion is eliminated, which leads to a reduction in manufacturing cost.

The fifth embodiment may be combined with the second and third embodiments. That is, when combined with the second embodiment, the connecting auxiliary blade 14D may have a substantially rectangular shape as shown in FIG. Further, when combined with the fourth embodiment, the curved shape of the coupling auxiliary wing 14D may be a shape that satisfies the relationship of the straight line 104 or the straight line 105 of FIG. 10 shown in the third embodiment.

Embodiment 6 FIG.
The sixth embodiment relates to an air conditioner including the blower 100 of any of the first to fifth embodiments. Below, Embodiment 5 is demonstrated by the example which used the air blower 100 for the indoor unit 200 of an air conditioning apparatus.

FIG. 14 is a schematic longitudinal sectional view showing an example of an air-conditioning apparatus according to Embodiment 6 of the present invention. FIG. 14 shows the left side of the figure as the front side of the indoor unit.

The indoor unit 200 has a configuration in which the blower 100 and the heat exchanger 204 are arranged in a housing 203. A suction port 201 for sucking room air into the interior is formed in the upper part of the housing 203, and conditioned air is supplied to the air conditioning target area at the lower part of the housing 203, more specifically, below the front surface of the housing 203. A blow-out port 202 is formed for this purpose. Further, the outlet 202 is provided with a mechanism for controlling the direction of air flow, such as a vane 202a.

The blower 100 is disposed on the downstream side of the suction port 201 and on the upstream side of the heat exchanger 204. A plurality of blowers 100 are arranged in parallel in the longitudinal direction of the housing 203 (in the direction perpendicular to the paper surface) according to the air volume required for the indoor unit 200.

The heat exchanger 204 is disposed in the ventilation path from the blower 100 to the outlet 202, and creates conditioned air by exchanging heat between the refrigerant and the room air.

The indoor air is taken into the indoor unit 200 from the suction port 201 at the top of the housing 203 by the blower 100. When this indoor air passes through the heat exchanger 204, it exchanges heat with the refrigerant, and is heated or cooled to become conditioned air. The conditioned air is blown out from the outlet 202 at the bottom of the housing 203 to the air-conditioning target area.

Since the indoor unit 200 configured as described above uses the blower 100 according to any one of the first to fifth embodiments, the radial velocity of the airflow can be obtained even when the conditioned air is passed through the indoor unit having a high pressure loss. It is possible to prevent a decrease in blowing performance due to the components. As a result, the power efficiency of the indoor unit 200 can be improved.

1 impeller, 2 boss part, 2a shaft hole, 3 moving blade, 10 casing, 10a cylindrical part, 10b flange part, 12 motor fixing part, 13 stationary blade, 13-A stationary blade, 13-B stationary blade, 13a pressure Surface, 13b suction surface, 13c connection location, 13d connection location, 14 connection auxiliary wing, 14A connection auxiliary wing, 14Aa end, 14Ab end, 14B connection auxiliary wing, 14C connection auxiliary wing, 14Ca end, 14Cb end, 14a end face, 20 motor, 21 shaft, 100 blower, 101 radial speed component, 102 axial speed component, 103 total speed component, 104 straight line, 105 straight line, 200 indoor unit, 201 suction port, 202 outlet, 202a vane, 203 housing, 204 heat exchanger, O rotation axis, t tangent, α angle θ angle of attack 14D connecting aileron, 14 Da end, 14 dB end.

Claims

A motor,
An impeller having a moving blade connected to a rotating shaft of the motor;
A casing having a cylindrical portion that is provided so as to surround the impeller and forms a flow path of an airflow along a rotation axis direction;
A motor fixing portion disposed on the downstream side of the impeller in the casing and supporting the motor;
A plurality of stationary blades extending in a radial direction of the rotating shaft from the motor fixing portion and coupled to the cylindrical portion of the casing;
The adjacent stationary blades, or a connecting auxiliary blade that connects the stationary blade and the casing,
The connecting auxiliary wing is a blower in which a cross section in a radial direction is inclined so as to be separated from the rotation shaft from the upstream side to the downstream side of the airflow.
The blower according to claim 1, comprising a plurality of the connecting auxiliary blades, wherein the plurality of connecting auxiliary blades are arranged concentrically around the rotation axis.
Of the both ends of the connection auxiliary blade connected to the stationary blade, the end on the front end side in the rotation direction of the motor is more in the radial direction than the end on the rear end side in the rotation direction. The blower according to claim 1, wherein the blower is connected to the stationary blade at a side.
Of both end portions of the connection auxiliary blade connected to the stationary blade, an end portion on a front end side in the rotation direction of the motor is connected to a center portion in the radial direction of the stationary blade, and a rear end in the rotation direction. The blower according to claim 3, wherein a side end portion is connected to the outer peripheral portion of the stationary blade in the radial direction.
The angle formed by “the tangent at each position in the longitudinal direction on the outer surface of the connecting auxiliary wing” and “the line connecting the position and the rotation axis” is the same at each position, or decreases toward the outside in the radial direction. The blower of Claim 3 or Claim 4 which becomes.
The blower according to any one of claims 3 to 5, wherein the connection auxiliary wings are shortened as the height in the direction of the rotation axis goes outward in the radial direction.
The blower according to any one of claims 1 to 5, wherein heights of both end portions of the connection auxiliary blade in the rotation axis direction are the same as heights of the stator blades at a connection position with the stator blades. .
The end portion on the rear end side in the rotation direction of the motor among both end portions of the connection auxiliary wing is connected to the cylindrical portion of the casing. Blower.
An air conditioner comprising the blower according to any one of claims 1 to 8.