JP6685433B2 - Blower and air conditioner - Google Patents

Description

  The present invention relates to a blower having a plurality of vanes and an air conditioner equipped with the blower.

  Conventionally, as a blower provided with a plurality of vanes, for example, there is an axial blower of Patent Document 1. The axial blower of Patent Document 1 is provided so as to surround a motor, an impeller having a moving blade fixed to a rotating shaft of the motor, and an impeller, and a flow path of an air flow along an axial direction of the rotating shaft. And a formed cylindrical casing. Inside the casing, a motor fixing portion to which the motor is fixed, and a plurality of vanes extending from the motor fixing portion in the radial direction of the rotation shaft and connected to the casing are arranged. The vanes rectify the components of the air flow passing through the impeller, which are swirling in the circumferential direction, into an axial flow to increase the axial air flow. Further, the axial blower of Patent Document 1 includes a connecting auxiliary blade that connects the stationary blades to each other at the central portion in the radial direction, and by connecting the stationary blades to each other, the strength of the motor fixing portion is increased to improve the impact resistance of the stationary blades. I try to improve the sex.

JP, 2008-261280, A

  The velocity component of the airflow passing through the impeller includes a velocity component parallel to the rotation axis and a velocity component in the rotation direction of the impeller, as well as a velocity component in the radial direction due to centrifugal force. The blower of Patent Document 1 has a problem that the airflow having a velocity component in the radial direction collides with the connecting auxiliary blades to disturb the flow, which deteriorates the blowing performance.

  The present invention has been made in view of the above circumstances, and a blower and an air blower capable of suppressing a decrease in blower performance that occurs when an air flow having a radial velocity component that has passed through an impeller collides with a connecting auxiliary blade. The object is to provide a harmony device.

A blower according to the present invention includes a motor, an impeller having a rotor blade connected to a rotation shaft of the motor, and a cylindrical portion that is provided so as to surround the impeller and forms a flow path of an air flow along the rotation axis direction. A casing having a motor, a motor fixing portion arranged downstream of the impeller in the casing and supporting the motor, and a plurality of vanes extending from the motor fixing portion in the radial direction of the rotation shaft and connected to the cylindrical portion of the casing. And adjacent stator blades, or a connecting auxiliary blade that connects the stationary blade and the casing, the connecting auxiliary blade has a radial cross section from the rotation axis as it goes from the upstream side to the downstream direction of the air flow. Of the both ends of the connecting auxiliary blade that is inclined to separate from each other and is connected to the stationary blade, the end on the front end side in the rotation direction of the motor is more radial than the end on the rear end side in the rotation direction. Stator vanes near the axis of rotation In which it has been linked.

  An air conditioner according to the present invention includes the blower described above.

  According to the present invention, the airflow having the radial velocity component that has passed through the impeller is converted into the airflow having the axial velocity component by the collision with the connecting auxiliary blade, so that the blower performance generated 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 which concerns on Embodiment 1 of this invention. It is a top view of the state where the impeller was removed from the air blower concerning Embodiment 1 of the present invention. It is the perspective view which looked at the state where the impeller was removed from the fan concerning Embodiment 1 of the present invention from the upper stream side. It is the figure which planarly expanded the cylindrical cross section of the air blower in the radial position in which the connection auxiliary blade of the air blower of FIG. 1 is arrange | positioned, and looked at the deployment surface from the radial direction outer side. It is explanatory drawing of the attack angle of the connection auxiliary blade of FIG. It is a top view of the state where the impeller was removed from the air blower concerning Embodiment 2 of the present invention. It is the perspective view which looked at the state where the impeller was removed from the blower concerning Embodiment 2 of the present invention from the upper stream side. FIG. 8 is a perspective view of the stationary blade and the connecting auxiliary blade of FIG. 6 seen from an angle different from that of FIG. 7. It is the top view which looked at the state which removed the impeller from the fan concerning Embodiment 3 of the present invention from the upstream side. It is a figure which shows the relationship between r and (alpha) in the air blower which concerns on Embodiment 3 of this invention. It is the perspective view which looked at the state where the impeller was removed from the blower concerning Embodiment 4 of the present invention from the upper stream side. FIG. 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. 11. It is a top view in the state where the impeller was removed from the fan concerning Embodiment 5 of the present invention. It is an outline longitudinal section showing an example of an air harmony device concerning Embodiment 6 of the present invention.

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

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

  The casing 10 has a cylindrical portion 10a and a flange portion 10b protruding outward in the radial direction from an upper end opening of the cylindrical portion 10a. The inside of the cylindrical portion 10a serves as a flow path of an air flow generated by the impeller 1 rotating about the rotation axis O. The motor fixing portion 12 is arranged at the center of the cylindrical portion 10a. Further, in the casing 10, a plurality of stationary blades 13 extending from the motor fixing portion 12 in the radial direction of the rotation axis O and connected to the casing 10, and a plurality of connected connecting blades 13 adjacent to each other in the circumferential direction. An auxiliary wing 14 is provided.

  The vane 13 has a function of converting a circumferential velocity component of the airflow into a static axial velocity component. Then, 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 housed in the motor fixing portion 12. Then, the shaft 21 of the motor 20 penetrates the shaft hole 2a of the boss portion 2 of the impeller 1 to project, and the projecting portion is tightened with a nut (not shown) to fix the impeller 1 and the motor 20. There is. The impeller 1 rotates clockwise around the rotation axis O of the shaft 21 when 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 the rotation of the impeller 1 causes air to be taken in from the upper side and blown out from the lower side. At this time, the airflow passing through the impeller 1 and flowing into the stationary vanes 13 and the auxiliary connecting vanes 14 has a circumferential velocity component. This circumferential velocity component is converted into an axial velocity component by the vanes 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 in which the impeller is removed from the blower according to Embodiment 1 of the present invention, as seen from the upstream side. FIG. 4 is a plan view of the cylindrical cross section of the blower at a radial position where the connecting auxiliary blades of the blower of FIG. 1 are arranged and the deployment surface is viewed from the outside in the radial direction. Hereinafter, the configurations of the stationary blade 13 and the connection auxiliary blade 14 will be described with reference to FIGS. 2 to 4. Here, for the sake of convenience of description, of the two adjacent stationary blades 13, the stationary blade 13 on the tip side in the rotation direction of the impeller 1 is replaced by the stationary blade 13-A and the stationary blade on the rear end side in the rotation direction as necessary. The blade 13 is distinguished as a stationary blade 13-B.

  In FIG. 2, the rotor blade 3 rotates clockwise. Immediately downstream of the moving blade 3, a plurality of the stationary blades 13 are radially formed between the motor fixing portion 12 and the cylindrical portion 10a with the rotation axis O as the center. When the casing 10 is viewed in plan as shown in FIG. 2, the vanes 13 have a shape that is convexly curved in the rotation 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 has a connecting portion between the stationary blade 13 and the motor fixing portion 12 and a connecting portion between the stationary blade 13 and the cylindrical portion 10a. Compared with both and, it is in the rotation angle position advanced in the rotation direction. The rotation angle position advanced in the rotation direction is the position rotated clockwise in FIG.

  Further, in FIG. 4, the rotor blade 3 rotates from right to left. Therefore, the left side of FIG. 4 advances at the rotation angle. The vertical direction of FIG. 4 is the direction of the rotation axis O, and the moving blades 3 and the stationary blades 13 are inclined with respect to the direction of the rotation axis O when viewed from the outside in the radial direction. Specifically, the moving blade 3 is inclined so that the upper side has a forward rotation angle and the lower side has a delayed rotation angle. Therefore, when the rotor blade 3 rotates, wind is generated from above to below.

  On the other hand, the stationary blade 13 is inclined such that the upper side has a delayed rotation angle and the lower side has a advanced rotation angle. In addition, the stationary blades 13 are arranged so as to be inclined with respect to the rotation axis O direction so that the upper side of the connection surface with the motor fixing portion 12 is on the upstream side in the rotation direction than the lower side. That is, the stationary blade 13 is inclined to the side opposite to the moving blade 3 with respect to the direction of the rotation axis O. The rotor blade 3 not only sends the wind from the top to the bottom in FIG. 4, but also generates the airflow of the rotation direction from the right to the left in FIG. 4, that is, the circumferential velocity component. The inclination of the stationary blade 13 on the downstream side of the moving blade 3 is 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. Therefore, the circumferential velocity component of the airflow generated in the moving blade 3 is converted into an axial component by the above-described shape of the stationary vane 13 on the downstream side and blown out.

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

  Here, as a characteristic configuration of the first embodiment, the connection auxiliary vanes 14 are inclined so as to be separated from the rotation axis O in the downstream direction of the air flow. In other words, the connecting auxiliary vanes 14 have 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 connecting auxiliary vanes 14 are close to the rotation axis O on the upper upstream side in FIG. 1, and are farther from the rotation axis O on the lower downstream side in FIG.

FIG. 5: is explanatory drawing of the angle of attack of the connection auxiliary blade of FIG.
As shown in FIG. 5, the connecting auxiliary vanes 14 have an angle of attack θ with respect to the total velocity component 103 of the radial velocity component 101 and the axial velocity component 102 of the impeller 1. Therefore, the connecting auxiliary blade 14 has a function as a stationary blade that converts the radial velocity component of the airflow into an axial velocity component.

  The velocity component of the air flow passing through the impeller 1 has 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 outside in the radial direction. In the structure of the casing 10 according to the first embodiment, since the connecting auxiliary vanes 14 are arranged between the stationary vanes 13-A and the stationary vanes 13-B, the radial velocity component passing through the impeller 1 is The airflow that it has collides with the connecting aileron 14.

  Here, although the connecting auxiliary blade is provided in the prior art as well, the inclination is opposite to that of the connecting auxiliary blade 14 of the first embodiment. For this reason, in the prior art connecting aileron, the airflow of the axial velocity component is converted into the velocity component inside the radius by the connecting aileron, but the radial velocity component collides with the connecting aileron, so that the axial velocity component It cannot be converted into a component, resulting in loss. On the other hand, as described above, the connecting auxiliary vanes 14 of the first embodiment are inclined so as to separate from the rotation axis O toward the downstream direction of the air flow, and have an angle of attack θ. Therefore, the airflow of the radial velocity component that collides with the connecting auxiliary vanes 14 is converted into the airflow of the axial velocity component, which increases the axial velocity component and improves the blowing performance of the blower 100. .

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

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

  FIG. 6 is a plan view showing a state in which the impeller is removed from the blower according to the second embodiment of the present invention. FIG. 7: is the perspective view which looked at the state which removed the impeller from the air blower which concerns on Embodiment 2 of this invention from the upstream side. 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. 7.

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

  In the above-described first embodiment, the connecting auxiliary vanes 14 are formed in a circular arc shape concentric with the rotation axis O, and the radial position from the rotation axis O is the same at any position in the circumferential direction. Therefore, the radial velocity component inside the radial position where the connecting auxiliary vane 14 is arranged can be converted into the axial velocity component, but the radial velocity component outside the radial velocity component can be converted into the axial velocity component. Cannot be converted to. 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 connecting auxiliary blade 14A are different from each other. Therefore, the radial velocity component of the impeller 1 can be converted into the axial velocity component in a wide radial range. Therefore, the blowing performance of blower 100 can be improved as compared with the first embodiment.

Embodiment 3.
The third embodiment specifies the curved shape of the connecting aileron 14 of the second embodiment. Hereinafter, the third embodiment will be described focusing on parts different from the second embodiment.

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

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

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 vanes 14B have the above-described curved shape, when the trailing edge of the impeller 1 passes through the upstream side of the connecting auxiliary vanes 14, the outer peripheral side end 14Ab to the inner peripheral side end 14Aa. Gradually interferes with. Therefore, the area in which the axial velocity component of the airflow collides with the connecting auxiliary blades 14 in a single time becomes small, and the time for which the trailing edge of the impeller 1 passes through the connecting auxiliary blades 14 also becomes long. As a result, by reducing the time change amount and the absolute value of the pressure field received by the impeller 1, it is possible to improve the quietness and the blowing performance.

Fourth Embodiment
The fourth embodiment is a modification of the shape of the connecting auxiliary blade 14A of the second embodiment. In the following, the description will focus on the differences between the fourth embodiment and the second embodiment.

FIG. 11: is the perspective view which looked at the state which removed the impeller from the air blower which concerns on Embodiment 4 of this invention from the upstream side. FIG. 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.
Although the connecting auxiliary blade 14A of the second embodiment is formed in a substantially rectangular shape, the connecting auxiliary blade 14C of the fourth embodiment has a height in the rotation axis direction that decreases toward the outer side in the radial direction. . The end surface 14a of the connecting auxiliary blade 14C on the upstream side 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 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 those in the second embodiment. That is, of the both end portions in the longitudinal direction of the connecting auxiliary blade 14C, the end portion 14Ca on the tip side in the rotation direction is connected to the radial center portion of the suction surface 13b of the stationary blade 13-A. On the other hand, among the both ends in the longitudinal direction of the connecting auxiliary blade 14C, the end portion 14Cb on the rear end side in the rotation direction 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). ) Is linked to. Further, although the connecting auxiliary blade 14C has an area smaller than that of the connecting auxiliary blade 14A of the second embodiment, it has a sufficient area for ensuring the strength, and the strength equivalent to that of the first embodiment is ensured. There is.

  With this configuration, the same effects as those of the second embodiment are obtained, and the area of the connecting auxiliary blade 14C on the outer side in the radial direction is smaller than that of the second embodiment, so that the connecting auxiliary blade 14C collides with the connecting auxiliary blade 14C. Less air flow. Therefore, in the fourth embodiment, it is possible to prevent the deterioration of the blowing performance of the blower 100 and improve the blowing performance while ensuring the same strength as that of the first embodiment.

  11 and 12, the upstream end surface 14a of the connecting auxiliary vane 14C in the rotation axis direction is an inclined surface that inclines toward the downstream side toward the radially outer side, but the configuration is not limited to this. Absent. That is, the downstream end surface of the connecting auxiliary blade 14C in the rotation axis direction may be an inclined surface that inclines toward the upstream side toward the radially outer side. In short, the connecting auxiliary blade 14C of the fourth embodiment may have a height in the rotation axis direction that becomes shorter toward the outer side in the radial direction.

  Further, a configuration in which the fourth embodiment is combined with the third embodiment may be used. That is, the curved shape of the connecting auxiliary blade 14C 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 5.
In the fifth embodiment, the connection points of the connecting auxiliary vanes 14C of the fourth embodiment are changed. Hereinafter, the fifth embodiment will be described focusing on parts different from the fourth embodiment.

FIG. 13 is a plan view showing a state in which the impeller is removed from the blower according to Embodiment 5 of the present invention.
The connecting auxiliary blade 14C of the fourth embodiment has connected the adjacent two vanes 13 in the radial direction. That is, the connecting auxiliary blade 14C connected the two adjacent stationary blades 13 to each other. On the other hand, in the connection auxiliary blade 14D of the fifth embodiment, among the both ends of the connection auxiliary blade 14D, the end portion 14Db on the rear end side in the rotation direction is connected to the cylindrical portion 10a of the casing 10. The end portion 14Da on the front end side in the rotation direction of the connecting auxiliary blade 14D is located in the middle of the two adjacent stationary blades in the radial direction of the stationary blade 13-A on the front side in the rotation direction, as in the fourth embodiment. Connected.

  The position where the end portion 14Db is connected to the casing 10 is between the two connection points 13c and 13d where the two vanes 13 are respectively connected to the casing 10. In particular, the connecting auxiliary 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 rotation direction of the casing 10 than the middle of the two connecting portions 13c and 13d. There is.

  With this configuration, as in the case of the above-described fourth embodiment, since the connecting auxiliary vanes 14D are present over the approximately two stationary vanes 13 in the circumferential direction, most of the radial component is converted into the axial direction. effective. Further, since the connecting 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 blades 13, and the connecting auxiliary blades 14 are integrally manufactured by resin molding using a mold, in the structure of the fourth embodiment shown in FIG. 11, the end portion 14Cb portion of the connecting auxiliary blades 14C is formed. Is undercut processing. On the other hand, in the fifth embodiment, since the end portion 14Db of the connecting auxiliary blade 14 is fixed to the casing 10, the undercut processing is eliminated, which leads to a reduction in manufacturing cost.

  The fifth embodiment may have a configuration combined with the second and third embodiments. That is, when combined with the second embodiment, the connecting auxiliary wing 14D may have a substantially rectangular shape as shown in FIG. When combined with the fourth embodiment, the curved shape of the connecting auxiliary blade 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.

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

  FIG. 14: is a schematic longitudinal cross-sectional view which shows an example of the air conditioning apparatus which concerns on Embodiment 6 of this invention. FIG. 14 shows the left side of the drawing 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 indoor air inside is formed in the upper part of the housing 203, and conditioned air is supplied to the air conditioning target area in the lower part of the housing 203, more specifically, on the lower side of the front surface of the housing 203. A blowout port 202 for forming is formed. Further, the outlet 202 is provided with a mechanism for controlling the blowing direction of the air flow, such as a vane 202a.

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

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

  The room air is taken into the indoor unit 200 by the blower 100 from the suction port 201 in the upper part of the housing 203. 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 from the outlet 202 at the bottom of the housing 203 to the air conditioning target area.

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

  DESCRIPTION OF SYMBOLS 1 Impeller, 2 Boss part, 2a Shaft hole, 3 Moving blade, 10 Casing, 10a Cylindrical part, 10b Flange part, 12 Motor fixing part, 13 Stator blade, 13-A Stator blade, 13-B Stator blade, 13a Pressure Surface, 13b negative pressure surface, 13c connection point, 13d connection point, 14 connection auxiliary blade, 14A connection auxiliary blade, 14Aa end portion, 14Ab end portion, 14B connection auxiliary blade, 14C connection auxiliary blade, 14Ca end portion, 14Cb end portion, 14a End face, 20 Motor, 21 Axis, 100 Blower, 101 Radial velocity component, 102 Axial velocity component, 103 Total velocity component, 104 Straight line, 105 Straight line, 200 Indoor unit, 201 Suction port, 202 Outlet port, 202a vane, 203 housing, 204 heat exchanger, O rotating shaft, t tangent line, α angle, θ angle of attack 14D connecting aileron, 4Da end, 14Db end.

Claims (7)

A motor,
An impeller having a moving blade connected to the 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 air flow along the rotation axis direction,
A motor fixing portion that is arranged on the downstream side of the impeller in the casing and supports the motor,
A plurality of stationary blades extending in the radial direction of the rotating shaft from the motor fixing portion and connected to the cylindrical portion of the casing;
Adjacent the stationary blades, or, a connection auxiliary blade for connecting the stationary blade and the casing,
The connection auxiliary vane has a radial cross section that is inclined so as to separate from the rotation axis from the upstream side to the downstream direction of the air flow ,
Of both end portions of the connection auxiliary blade connected to the stationary blade, an end portion on the front end side in the rotation direction of the motor has the rotation axis in the radial direction rather than an end portion on the rear end side in the rotation direction. A blower that is connected to the stationary blade at a leaning position . Of both ends of the connecting auxiliary blade connected to the stationary blade, an end portion on the front end side in the rotation direction of the motor is connected to the radial center portion of the stationary blade, and a rear end in the rotation direction. end of the side is, the blower of claim 1 wherein the coupled to the outer peripheral portion of the radial direction of the vane. The angle formed by "the tangent line 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 becomes smaller toward the outer side in the radial direction. The blower according to claim 1 or claim 2 . The connection ailerons, blower according to any one of claims 1 to 3 in which the height of the rotation axis direction are shorter toward the radially outward. The blower according to any one of claims 1 to 3 , wherein the height of both ends of the connecting auxiliary blade in the rotation axis direction is the same as the height of the stationary blade at a position where the connecting auxiliary blade is connected to the stationary blade. . Wherein one of the ends of the connecting aileron, the ends of the rear side in the rotation direction of the motor, according to any one of claims 1 to 5 which is connected to the cylindrical portion of the casing Blower. An air conditioner comprising the blower according to any one of claims 1 to 6 .

Images