JP2008157568A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce noises in an air conditioner while suppressing deterioration of fan efficiency. <P>SOLUTION: An indoor unit of the air conditioner is equipped with a cross-flow fan for blowing indoor air, and a heat exchanger for performing heat exchange with indoor air blown by the cross-flow fan. Each of blades 8b of the cross-flow fan is structured so that an end of an outer diameter side or an inner diameter side of each of blades 8b deforms in a different shape from each other in the axial direction based on differential pressure of a pressure surface 8a and a negative pressure surface 8b of each blade 8b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air conditioner, and more particularly to an air conditioner that uses a cross-flow fan as a blower in an indoor unit.

  As a once-through fan used in a conventional air conditioner, there is one disclosed in Japanese Patent Application Laid-Open No. 63-124899 (Patent Document 1). In the cross-flow fan, the blade outer diameter side or the blade inner diameter side of the cross-flow fan has a corrugated shape, and noise is reduced by dispersing the wind speed distribution of the fluid passing through the blade.

JP 63-124899 A

  However, in Patent Document 1, since the blade shape is always a corrugated shape, the fluid flows in a complicated manner in any air blowing state. As a result, the efficiency of the blower tends to decrease overall.

  An object of the present invention is to provide an air conditioner capable of reducing noise while suppressing a decrease in fan efficiency.

  In order to achieve the above-described object, the present invention provides an air conditioner including an once-through fan that blows indoor air and an indoor unit that includes a heat exchanger that exchanges heat with the indoor air ventilated by the once-through fan. In each of the cross-flow fans, the outer diameter side or inner diameter side end of each blade is deformed into a different shape in the axial direction based on the pressure difference between the pressure surface and the negative pressure surface of each blade. It is composed of.

A more preferable specific configuration example of the present invention is as follows.
(1) Each blade of the cross-flow fan is configured so as to be deformed in the axial direction in a region where a circulating vortex is generated in the blowing of room air.
(2) Each blade of the cross-flow fan is configured to be deformed in the axial direction in a high air volume and high rotation speed operation region.
(3) Each blade of the cross-flow fan is configured such that the amount of deformation in the axial direction changes according to the pressure difference between the pressure surface and the suction surface of each blade.
(4) Each blade of the cross-flow fan is composed of a region having a high elastic modulus and a region having a low elastic modulus, and deformation in the axial direction occurs in a region having a low elastic modulus on the outer diameter side or inner diameter side of the blade. That it is formed.
(5) Each blade of the cross-flow fan is configured to be deformed in the axial direction by setting the outer diameter side or inner diameter side of the blade as a region having a low elastic modulus.
(6) Each blade of the cross-flow fan is configured such that the outer diameter side or inner diameter side of the blade is partially thinned to cause deformation in the axial direction.

  According to the present invention, it is possible to provide an air conditioner capable of reducing noise while suppressing a decrease in fan efficiency.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. The same reference numerals in the drawings of the respective embodiments indicate the same or equivalent. In addition, this invention includes making it more effective by combining each embodiment suitably as needed.
(First embodiment)
The air conditioner of 1st Embodiment of this invention is demonstrated using FIGS. 1-8. As an example of an air conditioner, the present embodiment is applied to a separate type air conditioner in which an indoor unit includes a heat exchanger that performs heat exchange and a cross-flow fan that performs ventilation.

  First, an overall outline of the air conditioner of the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a front view showing a schematic structure of the indoor unit 20 of the air conditioner according to the present embodiment, and FIG. 2 is a side view of the indoor unit 20 shown in FIG. In addition, in FIG. 1, each part is fractured | ruptured and shown so that the inside can be expressed from the front side.

  In the indoor unit 20, a front panel 1 is installed on the front side, and an upper surface grill 2 constituting an air suction port is installed on the upper surface side. The upper part of the front panel 1 is pivotally attached to the unit frame 3, and the front panel 1 can be opened and closed from the lower part with the upper part as a fulcrum. Apart from that, the front panel 1 is configured such that during operation of the air conditioner, the upper part is opened with the lower part as a fulcrum and the intake port for indoor air can be enlarged. The front panel 1 can be detached by removing the upper part from the unit frame 3. The top grill 2 is also attached to the unit frame 3 and is detachable.

  A transverse wind direction plate 11 is installed at the air outlet 17 on the lower surface side of the indoor unit 20, and the transverse wind direction plate 11 is attached to the casing 9. The air outlet 17 of the indoor unit 20 is opened and closed as the side wind direction plate 11 rotates. As the indoor unit 20, the outer shape is substantially constituted by the front panel 1, the top grill 2, the unit frame 3, the cross wind direction plate 11, the casing 9, and the like.

  A prefilter 4 is installed immediately inside the front panel 1 and the top grill 2 of the indoor unit 20. The prefilter 4 is attached to the unit frame 3 and can be detached from the unit frame 3 by sliding. An air purification filter 5 is installed inside the prefilter 4. The air purification filter 5 is located on the front surface of the indoor unit 20 and is detachably attached to the unit frame 3.

  A heat exchanger 7 for exchanging heat with the indoor air to be ventilated is installed further inside the indoor unit 20. The heat exchanger 7 is composed of pipes 7a and fins 7b, and is arranged so as to surround the cross-flow fan 8. The heat exchanger 7 is divided into a total of three locations, one on the indoor unit upper side and two on the front side. . The cross-flow fan 8 is disposed so as to be sandwiched between the casings 9 and blows indoor air. The end of the rotating shaft of the once-through fan 8 is connected to a motor.

  The vertical wind direction plate 10 is attached to the casing 9, and rotates with the attachment portion as a fulcrum. The copper pipe 16 for refrigerant is covered with a heat insulating material, and is piped on the back side of the indoor unit near the casing 9. The electrical component unit 14 is arranged at the lower part on the back side of the front panel 1 so that the LED appears to shine when the front panel 1 is covered with the indoor unit 20.

  Next, a description will be given with reference to FIGS. 3 is a perspective view of the cross-flow fan 8 provided in the indoor unit 20 of FIG. 1, FIG. 4 is a perspective view of a fan block 8a constituting the cross-flow fan 8 of FIG. 3, and FIG. 5 is a cross-flow fan in FIG. FIG.

  Since the cross-flow fan 8 has a larger fan width than the fan diameter, a plurality of fan blocks 8a are connected in the axial direction in terms of strength and manufacturing, and is connected to an end plate to which a bearing is attached and a motor. It has a structure in which end plates with attached bosses are installed at both ends. One fan block 8a is composed of a plurality of blades 8b and a partition plate 8c on which these blades 8b are erected. In the partition plate 8c, the plate surface opposite to the plate surface on which the blades 8a are attached has a plurality of blade shapes that are fitted in the blade shape so that the blades 8b of the other fan blocks 8a can be fitted when the fan block 8a is connected. A groove 8h is provided.

  In the operating state, the air flow pattern in the vicinity of the once-through fan 8 passes between the blades 8b from the upstream side and travels from the outer diameter side toward the inner diameter side, as shown by the trajectory line in FIG. The air that has flowed into the cross-flow fan 8 passes between the blades 8b from the inner diameter side to the outer diameter side and flows toward the casing 9 side. The flow pattern of the once-through fan 8 forms a circulating vortex 12.

  Next, a description will be given with reference to FIG. 6 is a perspective view of the blade 8b constituting the fan block 8a of FIG.

  Each vane 8b of the cross-flow fan 8 has a shape in which the end on the outer diameter side of each vane 8b differs in the axial direction toward the negative pressure surface based on the pressure difference between the pressure surface 6a and the negative pressure surface 6b of each vane 8b. It is comprised so that it may deform | transform into. Specifically, each blade 8b of the cross-flow fan 8 includes a low elastic modulus region 8d in which the blade outer diameter side is a low elastic modulus region and a high elastic modulus region 8e in which the blade inner diameter side is a high elastic modulus region. It is composed of The low elastic modulus region 8d and the high elastic modulus region 8e are separated from each other with a wavy broken line 18 as a boundary, as shown in FIG.

  The function and operation of the indoor unit 20 of the air conditioner configured as described above will be described mainly assuming a state in which cooling / heating operation is performed.

  The air conditioner starts operation by receiving an operation signal from the remote controller in the electrical component of the electrical component unit 14 located in the back of the display unit of the front panel 1. The lightning color of the electrical component changes in accordance with the operation mode, and the operation mode can be determined by confirming the color from the display unit of the front panel 1.

  When the operation is started, the front panel 1 tilts forward with the lower portion serving as a fulcrum, and the upper portion of the indoor unit 20 opens. The side wind direction plate 11 is rotated under the control of the control device of the electrical component unit 14 and opens the air outlet 17 of the indoor unit 20 that has been covered. Further, by operating the remote controller, the horizontal wind direction plate 11 and the vertical wind direction plate 10 are controlled via the electric component unit 14, and the wind direction of the indoor unit 20 can be changed. When the indoor unit 20 receives the operation signal, the outdoor unit also operates. The refrigerant sent from the outdoor unit circulates through the heat exchanger 7 via the refrigerant copper pipe 16.

  The motor connected to the cross-flow fan 8 is rotated according to the operating state under the control of the electrical component unit 14. Cross-flow fan 8 is rotated in the clockwise direction in FIG. When the once-through fan 8 starts to rotate, the room air is mainly sucked from the opening of the front panel 1 and the top grill 2 and flows into the indoor unit 20 through the prefilter 4. Dust and the like in the room air are removed when passing through the prefilter 4. The air purification filter 5 installed further inside the pre-filter 4 cleans the air.

  Through the above process, the room air flows into the heat exchanger 7 and is heat-exchanged, and then flows to the cross-flow fan 8 side. The heat-exchanged room air is diverted by the partition plate 8c that divides the cross-flow fan 8 into several parts in the axial direction, and then sucked into the cross-flow fan 8. The room air sucked into the once-through fan 8 passes between the blades 8b and flows from the outer diameter side to the inner diameter side. The air that has flowed into the cross-flow fan 8 passes between the blades 8b, moves from the inner diameter side to the outer diameter side, and flows out to the casing 9 side. The air that has been divided by the partition plate 8c joins again when it is blown out to the casing 9 side. The indoor air is blown out from the outlet 17 of the indoor unit 20 with the wind direction controlled by the horizontal wind direction plate 11 and the vertical wind direction plate 10 provided on the downstream side of the casing 9.

  The shape of each blade 8b of the cross-flow fan 8 in such an operating state changes as shown in FIGS. FIG. 7 is a perspective view showing a deformed state of the blade 8b of FIG. 6, and FIG. 8 is a view showing a change in shape of the blade 8b in FIG.

  When the cross-flow fan 8 is rotating, the blade surface of each blade 8b has a pressure distribution having a pressure surface 6a where the pressure increases and a negative pressure surface 6b where the pressure decreases. Each vane 8b of the cross-flow fan 8 has a shape in which the end on the outer diameter side of each vane 8b differs in the axial direction toward the negative pressure surface based on the pressure difference between the pressure surface 6a and the negative pressure surface 6b of each vane 8b. To change. That is, the low elastic modulus region 8d on the blade outer diameter side has a wavy broken line 18 in FIG. 7 as a base, and has a shape that becomes uneven in the axial direction toward the suction surface as shown in FIG. Thus, the shape is deformed to the pressure surface side.

  In the present embodiment, each blade 8b of the once-through fan 8 is a region where the circulating vortex 12 is generated in the blowing of room air shown in FIG. 5, so that the outer diameter side of each blade 8b is deformed to the negative pressure surface side so as to have an uneven shape. Is formed. When each blade 8b of the once-through fan 8 passes through the region of the circulation vortex 12, it is considered that a large pressure is applied to the outer diameter side of the blade 8b, which becomes a noise source. In the region where the circulating vortex 12 is generated, the outer diameter side of the blade 8b is locally deformed due to the pressure difference, the flow between the blades 8b is dispersed, and noise is reduced. In a region where the pressure before and after the generation region of the circulating vortex 12 is relatively low, local deformation on the outer diameter side of the blade 8b is suppressed, and a decrease in fan efficiency can be suppressed.

  Further, in the present embodiment, each blade 8b of the cross-flow fan 8 is designed to reduce the noise by increasing the blade shape deformation in the high air volume and high rotational speed operation region where noise is particularly problematic. In the operation region where the flow rate is low and the rotation speed is not a problem, the blade shape deformation is reduced to maintain an efficient air blowing state.

As described above, according to the present embodiment, the air that has a high performance air blowing function by changing the shape of the cross-flow fan itself according to the situation while reducing both fan efficiency reduction and noise reduction. A harmony machine can be realized.
(Second to sixth embodiments)
Next, second to sixth embodiments of the present invention will be described with reference to FIGS. The second to sixth embodiments are different from the first embodiment in the points described below, and the other points are basically the same as those in the first embodiment, and thus redundant description is omitted.
(Second Embodiment)
The air conditioner of 2nd Embodiment which concerns on this invention is demonstrated using FIGS. 9-11. 9 is a perspective view of a blade 8b constituting the fan block 8a of the cross-flow fan 8 in the second embodiment, FIG. 10 is a perspective view showing a deformed state of the blade 8b of FIG. 9, and FIG. 11 is a blade 8b of FIG. It is a figure which shows the change of the shape in the cross section B of FIG.

  In the second embodiment, each blade 8b of the cross-flow fan 8 has a low elastic modulus region 8f in which the blade inner diameter side is a low elastic modulus region and a high elastic modulus region in which the blade outer diameter side is a high elastic modulus region. 8g. The low elastic modulus region 8f and the high elastic modulus region 8g are separated from each other with a wavy broken line 18 as a boundary, as shown in FIG.

  When the cross-flow fan 8 is rotating, each blade 8b of the cross-flow fan 8 has an inner diameter side end portion of each blade 8b based on the pressure difference between the pressure surface 6a and the negative pressure surface 6b of each blade 8b. It changes into a different shape in the axial direction toward the suction side. That is, the low elastic modulus region 8f on the inner diameter side of the blade has a wavy broken line 18 in FIG. 7 as a base, and has a shape that is uneven in the axial direction toward the suction surface as shown in FIG. The shape is deformed to the pressure surface side.

In the second embodiment, each blade 8b of the once-through fan 8 is formed in a region where the circulating vortex 12 is generated in the blowing of indoor air so that the inner diameter side of each blade 8b is deformed to the negative pressure surface side to have an uneven shape. ing. When each blade 8b of the once-through fan 8 passes through the region of the circulating vortex 12, it is considered that a relatively large pressure is applied to the inner diameter side of the blade 8b, which becomes a noise source. For example, in the region where the circulating vortex 12 is generated, the inner diameter side of the blade 8b is locally deformed due to the pressure difference, the flow between the blades of the blade 8b is dispersed, and noise is reduced. In a region where the pressure before and after the generation region of the circulating vortex 12 is relatively low, local deformation on the outer diameter side of the blade 8b is suppressed, and a decrease in fan efficiency can be suppressed.
(Third embodiment)
The air conditioner of 3rd Embodiment which concerns on this invention is demonstrated using FIG.12 and FIG.13. FIG. 12 is a perspective view of the blade 8b constituting the fan block 8a of the cross-flow fan 8 in the third embodiment, and FIG. 13 is a perspective view showing a deformed state of the blade 8b of FIG.

  In the third embodiment, each blade 8b of the cross-flow fan 8 has a low elastic modulus region 8d that is partially a low elastic modulus region on the blade outer diameter side, and an elastic modulus excluding the low elastic modulus region 8d. It is comprised by the high elastic modulus area | region 8e used as the high area | region. The low elastic modulus region 8d and the high elastic modulus region 8e are partially separated by a broken line 18A as shown in FIG.

  When the cross-flow fan 8 is rotating, each blade 8b of the cross-flow fan 8 is based on the pressure difference between the pressure surface 6a and the negative pressure surface 6b of each blade 8b, and the end portion on the outer diameter side of each blade 8b. Changes to the suction surface side in a different shape in the axial direction. That is, the low elastic modulus region 8d partially provided on the blade outer diameter side is deformed in a shape that protrudes toward the suction surface side as shown in FIG. 13 with the broken line 18A in FIG. 12 as a base.

According to the third embodiment, in the region where the circulating vortex 12 is generated, the low elastic modulus region 8d partially provided on the blade outer diameter side is deformed into a shape projecting toward the suction surface side due to the pressure difference, and the blade The flow between 8b is dispersed and noise is reduced. In a region where the pressure before and after the region where the circulating vortex 12 is generated is relatively low, the deformation of the low elastic modulus region 8d is suppressed, and a decrease in fan efficiency can be suppressed.
(Fourth embodiment)
The air conditioner of 4th Embodiment which concerns on this invention is demonstrated using FIG.14 and FIG.15. FIG. 14 is a perspective view of the blade 8b constituting the fan block 8a of the cross-flow fan 8 in the fourth embodiment, and FIG. 15 is a perspective view showing a deformed state of the blade 8b of FIG.

  In the fourth embodiment, each blade 8b of the cross-flow fan 8 has a low elastic modulus region 8f that is partially a low elastic modulus region on the blade inner diameter side and a high elastic modulus excluding the low elastic modulus region 8f. The region is composed of a high elastic modulus region 8g. As shown in FIG. 14, the low elastic modulus region 8f and the high elastic modulus region 8g are partially separated by a broken line 18A.

  When the cross-flow fan 8 is rotating, each blade 8b of the cross-flow fan 8 has an inner diameter side end portion of each blade 8b based on a pressure difference between the pressure surface 6c and the negative pressure surface 6d of each blade 8b. It changes into a different shape in the axial direction toward the suction side. That is, the low elastic modulus region 8f partially provided on the blade inner diameter side is deformed in a shape that protrudes toward the suction surface side as shown in FIG. 15 with the broken line 18A in FIG. 14 as a base.

According to the fourth embodiment, in the region where the circulating vortex 12 is generated, the low elastic modulus region 8f partially provided on the inner diameter side of the blade is deformed into a shape projecting toward the suction surface side due to the pressure difference, and the blade 8b The flow between is distributed and noise is reduced. In a region where the pressure before and after the region where the circulation vortex 12 is generated is relatively low, the deformation of the low elastic modulus region 8f is suppressed, and a decrease in fan efficiency can be suppressed.
(Fifth embodiment)
The air conditioner of 5th Embodiment which concerns on this invention is demonstrated using FIG. FIG. 16 is a sectional view showing a deformed state of the blades 8b constituting the fan block 8a of the cross-flow fan 8 in the fifth embodiment of the present invention.

  In the fifth embodiment, each blade 8b of the cross-flow fan 8 is composed of a thin region 8d that is partially thin on the blade outer diameter side, and a thick region 8e that excludes the thin region 8d. ing. The thin region 8d and the thick region 8e are separated by the same boundary as the broken line 18A shown in FIG.

  When the cross-flow fan 8 is rotating, each blade 8b of the cross-flow fan 8 is based on the pressure difference between the pressure surface 6a and the negative pressure surface 6b of each blade 8b, and the end portion on the outer diameter side of each blade 8b. Changes to the suction surface side in a different shape in the axial direction. That is, the thin region 8d partially provided on the blade outer diameter side is deformed in a shape that protrudes toward the suction surface side as shown in FIG.

According to the fifth embodiment, in the region where the circulating vortex 12 is generated, the thin region 8d partially provided on the blade outer diameter side is deformed into a shape projecting toward the suction surface side due to the pressure difference, and the blade 8b The flow between them is dispersed and noise is reduced. In a region where the pressure before and after the region where the circulating vortex 12 is generated is relatively low, deformation of the thin region 8d is suppressed, and a decrease in fan efficiency can be suppressed.
(Sixth embodiment)
The air conditioner of 6th Embodiment which concerns on this invention is demonstrated using FIG. FIG. 17 is a sectional view showing a deformed state of the blades 8b constituting the fan block 8a of the cross-flow fan 8 according to the sixth embodiment of the present invention.

  In the sixth embodiment, each blade 8b of the cross-flow fan 8 is composed of a thin region 8f that is partially thin on the blade inner diameter side and a thick region 8g excluding the thin region 8f. Yes. The thin region 8f and the thick region 8g are separated by the same boundary as the broken line 18A shown in FIG.

  When the cross-flow fan 8 is rotating, each blade 8b of the cross-flow fan 8 has an inner diameter side end portion of each blade 8b based on the pressure difference between the pressure surface 6a and the negative pressure surface 6b of each blade 8b. It changes into a different shape in the axial direction toward the suction side. That is, the thin region 8f partially provided on the blade inner diameter side is deformed in a shape that is convex toward the suction surface side as shown in FIG.

  According to the sixth embodiment, in the region where the circulating vortex 12 is generated, the thin wall region 8f partially provided on the inner diameter side of the blade is deformed into a shape protruding toward the suction surface side due to the pressure difference, and between the blades 8b. The flow is distributed and noise is reduced. In a region where the pressure before and after the region where the circulating vortex 12 is generated is relatively low, deformation of the thin region 8f is suppressed, and a decrease in fan efficiency can be suppressed.

It is a front view which shows schematic structure of the indoor unit of the air conditioner of 1st Embodiment of this invention. It is the side view which cut the indoor unit of Drawing 1 in the central part. It is a perspective view of the cross-flow fan with which the indoor unit of FIG. 1 is equipped. It is a perspective view of the fan block which comprises the once-through fan of FIG. FIG. 3 is a trajectory diagram of the once-through fan in FIG. 2. It is a perspective view of the blade | wing which comprises the fan block of FIG. It is a perspective view which shows the deformation | transformation state of the blade | wing of FIG. It is a figure which shows the change of the shape in the cross section A of the blade | wing of FIG. It is a perspective view of the blade | wing which comprises the fan block of the once-through fan in 2nd Embodiment of this invention. It is a perspective view which shows the deformation | transformation state of the blade | wing of FIG. It is a figure which shows the change of the shape in the cross section B of the blade | wing of FIG. It is a perspective view of the blade | wing which comprises the fan block of the once-through fan in 3rd Embodiment of this invention. It is a perspective view which shows the deformation | transformation state of the blade | wing of FIG. It is a perspective view of the blade | wing which comprises the fan block of the cross-flow fan in 4th Embodiment of this invention. It is a perspective view which shows the deformation | transformation state of the blade | wing of FIG. It is sectional drawing which shows the deformation | transformation state of the blade | wing which comprises the fan block of the once-through fan in 5th Embodiment of this invention. It is sectional drawing which shows the deformation | transformation state of the blade | wing which comprises the fan block of the crossflow fan in 6th Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Front panel, 2 ... Upper surface grille, 3 ... Unit frame, 4 ... Pre filter, 5 ... Emptying filter, 6a, 6c ... Pressure surface, 6b, 6d ... Negative pressure surface, 7 ... Heat exchanger, 8 ... Cross-flow fan, 8a ... Fan block, 8b ... Blade, 8c ... Cross-flow fan partition plate, 8d, 8f ... Low elastic modulus region, 8e, 8g ... High elastic modulus region, 8h ... Groove, 9 ... Casing, 10 ... Longitudinal wind direction plate, 11 ... Cross wind direction plate, 12 ... circulating vortex, 14 ... electric component unit, 16 ... copper pipe for refrigerant, 17 ... air outlet, 18 ... wavy broken line, 20 ... indoor unit.

Claims (7)

In an air conditioner having an indoor unit comprising a cross-flow fan that blows indoor air and a heat exchanger that exchanges heat with the indoor air ventilated by the cross-flow fan,
Each blade of the cross-flow fan is configured such that the outer diameter side or inner diameter side end of each blade is deformed into a different shape in the axial direction based on the pressure difference between the pressure surface and the suction surface of each blade. An air conditioner characterized by being made.   2. The air conditioner according to claim 1, wherein each blade of the cross-flow fan is configured to be deformed in the axial direction in a region where a circulating vortex is generated in blowing indoor air.   2. The air conditioner according to claim 1, wherein each blade of the cross-flow fan is configured to be deformed in the axial direction in a high air volume and high rotation speed operation region.   In Claim 1, each blade | wing of the said cross-flow fan is comprised so that the deformation amount to the said axial direction may change according to the pressure difference of the pressure surface in each said blade | wing, and a negative pressure surface, It is characterized by the above-mentioned. Air conditioner to do.   In Claim 1, each blade | wing of the said cross-flow fan is comprised in the area | region with a high elastic modulus and a low area | region, and the deformation | transformation to the said axial direction arises in the area | region with a low elastic modulus of the outer diameter side or inner diameter side of the said blade | wing. An air conditioner characterized by being formed as described above.   6. The blade according to claim 5, wherein each blade of the cross-flow fan is configured to be deformed in the axial direction with the outer diameter side or inner diameter side of the blade being partially a region having a low elastic modulus. Air conditioner.   2. The air conditioner according to claim 1, wherein each blade of the cross-flow fan is configured such that the outer diameter side or inner diameter side of the blade is partially thinned to cause deformation in the axial direction. .

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