JP2012112640A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indoor unit that suppresses a decrease in airflow because the airflow drops though noises can be prevented by providing notches in vanes of a fan of the indoor unit and, when a fin pitch in a heat exchanger is partly narrow, the airflow becomes too small due to large ventilation resistance in the narrow fin-pitch part, and the same problem occurs when parts different in ventilation resistance are arranged in the lengthwise direction of the fan even in units other than the heat exchanger.SOLUTION: The fan has a plurality of vaned wheels 21 each having at least two vanes and provided at the same axis of revolution, and each vaned wheel 21 includes a vaned wheel 21A and a vaned wheel 21B, which have the different number of vane notches in the vane.

Description

  The present invention relates to an indoor unit including a blower having a plurality of impellers.

  Conventionally, an air conditioner indoor unit uses a blower such as a cross flow fan having a plurality of impellers arranged on the same rotation shaft. Usually, notches are formed in the blade tips on the outer peripheral side and / or inner peripheral side of a plurality of blades constituting the impeller in order to reduce noise due to airflow (see, for example, Patent Document 1). .

  Moreover, the indoor unit is equipped with the heat exchanger in the flow path of the airflow which generate | occur | produces with an air blower. The air sucked from the room by the blower is heat-exchanged with the refrigerant through the heat exchanger and then blown out into the room. As the heat exchanger, one having a large number of fins arranged in parallel and a plurality of hairpin tubes penetrating through the large number of fins is used. When manufacturing a heat exchanger, after inserting a hairpin tube with a large number of fins with holes formed through which the hairpin tube is inserted in parallel, the hairpin tube is inserted into the hairpin tube. The tube is expanded to fix the fin and the hairpin tube, and then the tube expansion jig is pulled out. As the tube expanding jig is inserted and pulled out, the fin pitch on the curved portion side of the hairpin tube may become narrower than the fin pitch of other portions among the large number of fins.

JP 63-124899 A

Although notches are provided in the blades of the blower, noise can be prevented, but the air volume is reduced. For this reason, as described above, if the heat exchanger has a portion with a narrow fin pitch, the ventilation resistance increases in this portion, which causes a problem that the air volume becomes too small.
In addition to heat exchangers, the same problem arises when components with different ventilation resistance are arranged in the longitudinal direction of the blower.

  Accordingly, an object of the present invention is to provide an indoor unit that can suppress a reduction in air volume.

  An indoor unit according to a first aspect of the present invention includes a blower and a heat exchanger disposed in a flow path of an air flow generated by the blower, and the blower includes two or more blades and has the same rotational axis. The plurality of impellers includes a plurality of types of impellers having different numbers of blade notches.

  In this indoor unit, in the longitudinal direction of the blower, the air volume of the part of the impeller having a small number of blade notches among the plurality of impellers is larger than the air volume of the other impeller parts. Therefore, when the ventilation resistance of the air flow is different with respect to the longitudinal direction of the blower, it is possible to suppress a decrease in the air volume by changing the number of notches according to the ventilation resistance.

The “number of blade cutouts provided in the impeller” is the total number of cutouts formed on the outer peripheral wing tip and the inner peripheral wing tip of all the blades of the impeller.
In addition, “the number of blade notches provided in one impeller is less than the number of blade notches provided in another impeller” means that “the other impeller” is a plurality. It means that the number of notches of “one impeller” is smaller than all the impellers of the plurality of impellers.
Further, the small number of notches includes the case where the number of notches is zero.

  In the indoor unit according to a second aspect of the present invention, in the first aspect, the flow path of the air flow has a flow path resistance portion disposed in a range corresponding to a part of the longitudinal direction of the blower, The number of notches of the impeller disposed in a range corresponding to the flow path resistance portion is smaller than the number of notches of the blades of other impellers.

  In this indoor unit, since the number of notches of the blades of the impeller arranged in a range corresponding to the flow path resistance portion is small, it is possible to suppress a decrease in the air volume. Moreover, since impellers other than this impeller have many notches, the noise by an airflow can be reduced as a whole.

  An indoor unit according to a third invention is the indoor unit according to the second invention, wherein the heat exchanger has a hairpin tube that penetrates a plurality of fins, and the flow path resistance portion is the It is a portion adjacent to the curved portion of the hairpin tube.

  In this indoor unit, even if the fin pitch is narrow in the portion adjacent to the curved portion of the hairpin tube among the plurality of fins, since the number of notches of the impeller blades arranged in the range corresponding to this portion is small, It is possible to suppress a decrease in the air volume.

  An indoor unit according to a fourth invention is characterized in that, in the third invention, the impeller having a small number of notches of the blades has a portion that does not face the fins.

  In this indoor unit, since a part of the impeller having blades with few notches is arranged outside the fins of the heat exchanger, the fins are adjacent to the curved portion of the hairpin tube among the plurality of fins. Even when the pitch is narrow, it is possible to effectively suppress the decrease in the air volume.

  An indoor unit according to a fifth invention is the indoor unit according to the second invention, comprising a plurality of filters arranged side by side in a longitudinal direction of the blower in the flow path of the air flow, wherein the flow path resistance portion is the plurality of filters. Among these, the filter is the closest to the blower.

  In this indoor unit, the distance from the blower is the shortest among the plurality of filters, and the number of notches of the impeller blades arranged in the range corresponding to the filter with the largest ventilation resistance is small, so the air volume is reduced. Can be suppressed.

  In the indoor unit according to a sixth aspect of the present invention, in the second aspect, an electrical component box disposed in a range corresponding to a part of the longitudinal direction of the blower is provided in the flow path of the air flow, The flow path resistance portion is the electrical component box.

  In this indoor unit, since the number of notches of the blades of the impeller arranged in a range corresponding to the electrical component box is small, it is possible to suppress a decrease in the air volume.

  The indoor unit according to a seventh aspect of the present invention is the indoor unit according to the second aspect, wherein the heat exchanger is stacked on the main heat exchanger and the main heat exchanger and corresponds to a part of the blower in the longitudinal direction. And an auxiliary heat exchanger arranged, and the flow path resistance portion is the auxiliary heat exchanger.

  In this indoor unit, since there are few notches of the blade | wing of the impeller arrange | positioned in the range corresponding to an auxiliary heat exchanger, it can suppress that an air volume falls.

  An indoor unit according to an eighth aspect of the present invention includes, in the second aspect of the present invention, a filter provided in the air flow passage, and the filter is disposed in a range corresponding to a part of the longitudinal direction of the blower. Auxiliary filters are stacked, and the flow path resistance portion is the auxiliary filter.

  In this indoor unit, since the number of notches of the blades of the impeller arranged in a range corresponding to the auxiliary filter is small, it is possible to suppress a decrease in the air volume.

  In the indoor unit according to a ninth aspect of the present invention, in the second aspect, the air flow channel is provided with an additional function unit arranged in a range corresponding to a part of the longitudinal direction of the blower, The flow path resistance part is the additional function part.

  In this indoor unit, since there are few notches of the blade | wing of the impeller arrange | positioned in the range corresponding to an additional function part, it can suppress that an air volume falls.

  An indoor unit according to a tenth aspect of the invention is the second aspect of the invention, further comprising a casing having a suction port for sucking in air supplied to the blower, and the flow path resistance portion of the suction port in the longitudinal direction of the blower. It is the wall part provided in the outer side, It is characterized by the above-mentioned.

  In this indoor unit, since there are few notches of the blade | wing of the impeller arrange | positioned in the range corresponding to the wall part of the said longitudinal direction outer side of a suction inlet, it can suppress that an air volume falls.

  The indoor unit according to an eleventh aspect of the present invention is the indoor unit according to the second aspect, wherein the indoor unit is disposed in a range corresponding to a part of a longitudinal direction of the blower and a filter provided in the air flow path, and moves the filter. And the flow path resistance portion is the drive mechanism.

  In this indoor unit, since the number of notches of the blades of the impeller arranged in a range corresponding to the drive mechanism is small, it is possible to suppress a decrease in the air volume.

  An indoor unit according to a twelfth aspect of the present invention is the indoor unit according to the first aspect, wherein the plurality of impellers include a central impeller disposed at a longitudinal center of the blower, and the blades of the central impeller are cut off. The number of notches is smaller than the number of notches of the blades of the impeller arranged outside thereof.

  In this indoor unit, even if the members constituting the air flow path are deformed and deformed in the central portion in the longitudinal direction of the blower, even if the air flow is difficult to flow or the flow velocity is reduced in the bent portion, the longitudinal direction of the blower Since there are few notches of the blade | wing of the center impeller arrange | positioned in the center part, it can suppress that an airflow falls.

  As described above, according to the present invention, the following effects can be obtained.

  In the first aspect of the invention, in the longitudinal direction of the blower, the air volume of the portion of the impeller having a small number of blade notches among the plurality of impellers is larger than the air volume of the other impeller portions. Therefore, when the ventilation resistance of the air flow is different with respect to the longitudinal direction of the blower, it is possible to suppress a decrease in the air volume by changing the number of notches according to the ventilation resistance.

  In 2nd invention, since there are few notches of the blade | wing of the impeller arrange | positioned in the range corresponding to a flow-path resistance part, it can suppress that an air volume falls. Moreover, since impellers other than this impeller have many notches, the noise by an airflow can be reduced as a whole.

  In the third invention, even if the fin pitch is narrow in the portion adjacent to the curved portion of the hairpin tube among the plurality of fins, the number of notches of the impeller blades disposed in the range corresponding to this portion is small. It is possible to suppress a decrease in the air volume.

  In 4th invention, since a part of impeller which has a blade | wing with few notches is arrange | positioned outside the fin of a heat exchanger, in the part adjacent to the curved part of a hairpin tube among several fins Even when the fin pitch is narrow, it is possible to effectively suppress the decrease in the air volume.

  In the fifth aspect of the invention, since the number of notches of the impeller blades arranged in a range corresponding to the filter having the largest ventilation resistance is the shortest among the plurality of filters, the air volume is reduced. Can be suppressed.

  In 6th invention, since there are few notches of the blade | wing of the impeller arrange | positioned in the range corresponding to an electrical component box, it can suppress that an air volume falls.

  In 7th invention, since there are few notches of the blade | wing of the impeller arrange | positioned in the range corresponding to an auxiliary heat exchanger, it can suppress that an air volume falls.

  In the eighth aspect of the invention, since the number of notches of the impeller blades arranged in the range corresponding to the auxiliary filter is small, it is possible to suppress a reduction in the air volume.

  In 9th invention, since there are few notches of the blade | wing of the impeller arrange | positioned in the range corresponding to an additional function part, it can suppress that an air volume falls.

  In the tenth invention, since the number of notches of the blades of the impeller arranged in a range corresponding to the wall portion on the outer side in the longitudinal direction of the suction port is small, it is possible to suppress a reduction in the air volume.

  In the eleventh aspect of the invention, since the number of notches in the impeller disposed in the range corresponding to the drive mechanism is small, it is possible to suppress a reduction in the air volume.

  In the twelfth aspect of the present invention, even if the member constituting the air flow passage is deformed and deformed in the central portion in the longitudinal direction of the blower, the air flow becomes difficult to flow or the flow velocity is reduced in the bent portion. Since there are few notches of the blade | wing of the center impeller arrange | positioned in the direction center part, it can suppress that an air volume falls.

It is a perspective view of the indoor unit concerning a 1st embodiment of the present invention. It is sectional drawing which follows the AA line shown in FIG. It is a front view which shows the state which removed the open / close panel from the indoor unit shown in FIG. It is a partial exploded perspective view of the indoor unit shown in FIG. It is a partial exploded perspective view of the indoor unit shown in FIG. (A) is a top view of a heat exchanger and an air blower, (b) is a front view of (a). It is the front view which showed the heat exchanger and the air blower typically. It is a partial expansion perspective view of an air blower. It is sectional drawing of an air blower. It is a figure which shows the positional relationship of the air blower of an indoor unit and auxiliary filter which concern on 2nd Embodiment of this invention. It is a figure which shows the positional relationship of the air blower of an indoor unit and electrical component box which concern on 3rd Embodiment of this invention. It is sectional drawing of the indoor unit which concerns on 4th Embodiment of this invention. It is sectional drawing of the indoor unit which concerns on 5th Embodiment of this invention. It is a figure which shows the positional relationship of the air blower and auxiliary heat exchanger of an indoor unit shown in FIG. It is a front view of the indoor unit which concerns on 6th Embodiment of this invention. It is sectional drawing of the indoor unit which concerns on 7th Embodiment of this invention. It is a perspective view of the indoor unit which concerns on 8th Embodiment of this invention. It is sectional drawing which follows the BB line shown in FIG. It is a perspective view of the filter unit shown in FIG. It is a figure which shows the positional relationship of the filter, rotary brush, and compression rod of the indoor unit shown in FIG. It is a perspective view which shows the meshing state of the rack part and pinion of the filter of the indoor unit shown in FIG. It is a figure which shows the positional relationship of the air blower and drive mechanism of an indoor unit shown in FIG. It is sectional drawing of the indoor unit which concerns on 9th Embodiment of this invention. It is a fragmentary perspective view of the indoor unit shown in FIG. It is a figure which shows the positional relationship of the air blower and additional function unit of an indoor unit shown in FIG.

<First Embodiment>
Hereinafter, a floor-standing indoor unit 1 (hereinafter simply referred to as “indoor unit 1”) according to a first embodiment of the present invention will be described.
The indoor unit 1 constitutes an air conditioner together with an outdoor unit (not shown), and performs indoor air conditioning. As shown in FIG. 1, the indoor unit 1 of the present embodiment has a rectangular parallelepiped shape as a whole, and is installed on a wall surface in a state of floating from the indoor floor surface. In the present embodiment, the height H (see FIG. 1) of the indoor unit 1 from the floor is about 2 cm. In the following description, the direction protruding from the wall to which the indoor unit 1 is attached is referred to as “front”, and the opposite direction is referred to as “rear”. Further, the left-right direction and the up-down direction shown in FIG. 1 are simply referred to as “left-right direction” and “up-down direction”.

  As shown in FIG. 2, the indoor unit 1 includes a casing 2 and internal devices such as a blower 20, a heat exchanger 30, and an electrical component box 10 accommodated in the casing 2. In this indoor unit 1, the auxiliary suction port 2 b formed on the front wall of the casing 2 while sucking air in the vicinity of the floor surface from the main suction port 2 a formed on the lower wall of the casing 2 by driving the blower 20. Inhale air from 2c. The sucked air is heated or cooled in the heat exchanger 30 and then blown out from the air outlet 2d formed on the upper wall of the casing 2.

  The casing 2 includes a main body frame 3 (see FIG. 4), an outlet cover 4 (see FIG. 5) disposed in front of the main body frame 3, a radiation panel 5 (see FIG. 5), and an open / close panel 6 (see FIG. 5). ). The main body frame 3 is a substantially rectangular box having an open front, and is attached to a wall surface, supporting the various internal devices described above.

  As shown in FIG. 3, the air outlet cover 4 is disposed in front of the upper end portion of the main body frame 3. On the upper surface of the outlet cover 4, an outlet 2 d that is a rectangular opening that is long in the left-right direction is formed. A radiation panel 5 is disposed below the outlet cover 4.

  The open / close panel 6 is disposed below the radiation panel 5 and is detachable from the front grille 7 attached to the main body frame 3. As shown in FIG. 3, the filters 11 and 12 can be attached and detached by removing the open / close panel 6. Further, between the radiation panel 5 and the open / close panel 6, an auxiliary suction port 2b which is a slit-like opening long in the left-right direction (horizontal direction) is formed. In the vicinity of the upper end of the open / close panel 6, an auxiliary suction port 2c, which is a slit-like opening long in the left-right direction, is formed. Further, a main suction port 2 a that is an opening that is long in the left-right direction is formed at the lower end of the front grill 7. The main suction port 2 a is located between the lower end of the open / close panel 6 and the main body frame 3. The main suction port 2a, the auxiliary suction ports 2b and 2c, and the outlet 2d have substantially the same length in the left-right direction. The auxiliary suction ports 2b and 2c may not be provided.

  The blower 20 is disposed slightly above the central portion in the height direction of the casing 2. The blower 20 is configured by a cross flow fan, and is arranged such that its axial direction is along the left-right direction. The blower 20 sucks air from the lower front and blows it upward and backward. The detailed configuration of the blower 20 will be described later.

  An air outlet unit 8 is disposed above the blower 20, and the air outlet unit 8 is covered with an air outlet cover 4. The air blown out from the blower 20 is guided to the air outlet 2 d provided in the air outlet cover 4 through a flow path formed between the air outlet unit 8 and the main body frame 3. The blower outlet unit 8 includes a horizontal flap 8a disposed in the vicinity of the blower outlet 2d. The horizontal flap 8a changes the airflow direction of the airflow blown from the air outlet 2d and opens and closes the air outlet 2d.

  The heat exchanger 30 includes a front heat exchanger 30a and a rear heat exchanger 30b that are arranged in a V shape so as to surround the front and lower sides of the blower 20. The front heat exchanger 30 a is parallel to the front surface of the casing 2 and is disposed in front of the blower 20, and the upper half thereof faces the blower 20. The rear heat exchanger 30b is inclined upward as it approaches the back surface from the vicinity of the lower end of the front heat exchanger 30a, and is disposed below the blower 20. The detailed configuration of the heat exchanger will be described later.

  The radiation panel 5 constitutes a part of the front portion of the casing 2. The radiant panel 5 has a panel pipe 5a through which the refrigerant flows. Radiant heating is performed by radiating the heat of the refrigerant flowing through the panel pipe 5a into the room.

  The front grille 7 is attached to the main body frame 3 so as to cover from the substantially vertical central portion of the front heat exchanger 30a to the lower end of the main body frame 3. The front grille 7 has a filter holding part 7a. The left and right upper filters 11 and the left and right lower filters 12 are held in the filter holding portion 7a. Note that only the lower part of the upper filter 11 is held by the filter holding part 7 a, and the upper part is held by the radiation panel 5.

  The upper filter 11 and the lower filter 12 have a frame body 13 and a filter main body 14 formed of a net stretched inside the frame body 13. An auxiliary filter holding portion 13 a is provided at the center of the frame 13 of the lower filter 12. The filter body 14 constitutes the filter of the present invention.

  The auxiliary filter 15 is held in the auxiliary filter holding portion 13a. The auxiliary filter 15 is disposed behind the filter body 14 and captures particulates in the air such as pollen and dust that cannot be captured by the filter body 14. As the auxiliary filter 15, an electrostatic filter, a photocatalytic filter, or the like is used. The auxiliary filter 15 is shorter than the filter main body 14 in the left-right direction, and is arranged at a substantially central portion of the filter main body 14 in the left-right direction.

  The electrical component box 10 is installed in a flow path from the main suction port 2a to the rear heat exchanger 30b, and accommodates a circuit board and the like. The electrical component box 10 is disposed in a range corresponding to the substantially right half of the blower 20 in the left-right direction.

Next, details of the heat exchanger will be described.
As shown in FIG. 4 and FIG. 6, a pipe 42 for supplying the refrigerant sent from the outdoor unit to the heat exchanger 30 and the radiation panel 5 is arranged on the right side of the heat exchanger 30. An attachment portion 43 for attachment to the main body frame 3 is provided at the left end portion of the heat exchanger 30. A motor cover 45 that supports the fan motor 44 is attached to the right end portion of the heat exchanger 30, and the right end portion of the heat exchanger 30 is attached to the main body frame 3 via the motor cover 45.

  As shown in FIG. 7, the heat exchanger 30 (the front heat exchanger 30 a and the back heat exchanger 30 b) includes a plurality of fins 31 that are arranged in parallel in the left-right direction and a plurality of fins 31 that pass through the plurality of fins 31. It has a hairpin tube 32 and a connecting tube 33 that connects adjacent hairpin tubes 32 to each other.

  A large number of fins 31 are arranged in parallel in the left-right direction. Each fin 31 is formed with a plurality of through holes (not shown) through which the hairpin tube 32 penetrates, and a fin collar (not shown) is erected on the peripheral edge of the through hole. A large number of fins 31 are opposed to the blower 20. Specifically, the leftmost fin 31 among the multiple fins 31 is located on the right side of the left end of the blower 20.

  The hairpin tube 32 includes two straight portions 32a and a curved portion 32b extending in parallel. In the hairpin tube 32, the straight portion 32a extends in the left-right direction, and the curved portion 32b is disposed on the left side of the straight portion 32a. The straight portion 32 a passes through a large number of fins 31, and the curved portion 32 b is located on the left side of the leftmost fin 31. As shown in FIG. 6B, the bending portion 32 b is covered with a bending portion cover 46. As shown in FIG. 2, in the present embodiment, the front heat exchanger 30 a has twelve hairpin tubes 32, and the rear heat exchanger 30 b has six hairpin tubes 32.

  The connecting tube 33 is formed in a U shape, and both ends thereof are connected at the right end of the adjacent hairpin tube 32. Accordingly, the plurality of hairpin tubes 32 communicate with each other via the connecting tube 33, and the hairpin tubes 32 at both ends are connected to a pipe 42 disposed on the right side of the heat exchanger 30.

  As a manufacturing procedure of the front heat exchanger 30a and the back heat exchanger 30b, first, the straight portion 32a of the hairpin tube 32 is inserted through the through holes of a large number of fins 31 arranged in parallel at equal intervals. Next, the linear portion 32a and the fin 31 are fixed by pushing the tube expansion jig having a slightly larger diameter than the linear portion 32a into the linear portion 32a to expand the linear portion 32a. Thereafter, the tube expansion jig is pulled out from the hairpin tube 32. Along with the insertion and withdrawal of the tube expansion jig, the fin pitch of the plurality of fins 31 on the curved portion 32b side is narrower than the fin pitch of the other portions.

Next, details of the blower 20 will be described.
As shown in FIG. 4, a fan motor 44 for driving the blower 20 is disposed on the right side of the blower 20. The fan motor 44 is attached to the main body frame 3 via a motor cover 45. Further, the right end portion of the blower 20 (specifically, an end plate 24 to be described later and a part of the right end impeller 21 </ b> B) includes a semicircular recess 45 a formed in the motor cover 45, and the right side of the main body frame 3. It arrange | positions between the semicircle-shaped recessed parts 3a formed in the part. Further, the left end portion of the blower 20 (specifically, an end plate 25 described later and a part of the left end impeller 21A) includes a semicircular recess 43a formed in the mounting portion 43 of the heat exchanger 30, and It arrange | positions between the semicircle-shaped recessed parts 3b formed in the left side part of the main body frame 3. As shown in FIG.

  As shown in FIGS. 4 and 8, the blower 20 includes a plurality of impellers 21 disposed on the same rotation shaft, a plurality of annular plates 23 disposed between adjacent impellers 21, and a plurality of blades. Circular end plates 25, 24 arranged at the left and right ends of the vehicle 21 are provided. As shown in FIG. 9, a cylindrical boss portion 24 a into which the rotation shaft of the fan motor 44 is inserted is provided at the center portion of the right end plate 24 so as to protrude rightward. A shaft portion 25a supported by a bearing portion 3c (see FIG. 4) formed on the main body frame 3 is provided at the center portion of the left end plate 25 so as to protrude leftward.

  As shown in FIG. 8, the impeller 21 includes a plurality of blades 22 arranged side by side in the circumferential direction on the side surface of the annular plate 23. Each blade 22 has a predetermined blade angle and extends parallel to the rotation axis direction (left-right direction). Moreover, as shown in FIG. 9, the shape of the blade 22 is different between the leftmost impeller 21A and the plurality of impellers 21B other than the impeller 21A. In FIG. 9, only the upper and lower blades 22 are shown, and the other blades 22 are omitted.

  As shown in FIG. 9, a plurality of substantially triangular cutouts 26 are formed on the outer wing tip of each blade 22B of the impeller 21B. Between adjacent notches 26 is formed by a smoothing portion 27 extending in the left-right direction. By providing a plurality of notches 26 in the blade 22B, noise due to airflow is reduced. The inner peripheral wing tip of each blade 22B extends in the left-right direction.

  Further, only one substantially triangular cutout 28 is formed at the outer wing tip of each blade 22A of the leftmost impeller 21A. The portion other than the notch 28 is constituted by a smoothing portion 29 extending in the left-right direction. Further, the inner peripheral wing tip of each blade 22A extends in the left-right direction. Since the impeller 21A has fewer notches than the impeller 21B, the noise caused by the air flow is larger than that of the impeller 21B, but the air volume is larger than that of the impeller 21B.

  As described above, the fin pitch is narrow in the vicinity of the curved portion 32 b of the hairpin tube 32 among the plurality of fins 31. The impeller 21 </ b> A faces the above-described narrow fin pitch portion of the heat exchanger 30. The portion with a narrow fin pitch has a large ventilation resistance. However, since the impeller 21A with few notches is arranged as the impeller 21 facing this portion, all the impellers 21 are configured by the impeller 21B. Compared with the case, it is possible to suppress a decrease in the air volume. Further, since the impeller 21B other than the impeller 21A has a large number of notches, the noise due to the airflow can be reduced as a whole.

  Moreover, in this indoor unit 1, since the left end part of the impeller 21A is arranged outside the left end fin 31 in the heat exchanger 30, even if the fin pitch of the left part of the heat exchanger 30 is narrow, It is possible to effectively suppress the decrease in the air volume.

  In addition, in this embodiment, although the heat exchanger 30 is formed in V shape, the plate shape arrange | positioned substantially parallel to the front surface of the casing 2 may be sufficient as the whole heat exchanger.

Second Embodiment
Next, an indoor unit according to a second embodiment of the present invention will be described. However, about the thing which has the structure similar to 1st Embodiment, the description is abbreviate | omitted suitably using the same code | symbol.
1st Embodiment mentioned above is a structure for preventing the part which adjoins the curved part 32b of the hairpin tube 32 among several fins 31 becomes flow-path resistance, and the air volume falls, but the following 1st The second to ninth embodiments are configurations for preventing a decrease in air volume due to other flow path resistance units.
The indoor unit of the present embodiment is different from the first embodiment in the configuration of the blower 120, and the other configurations are the same as those in the first embodiment.

  As shown in FIG. 10, in the blower 120 of the present embodiment, the configuration of the impeller 21A arranged in a range corresponding to the auxiliary filter 15 is the same as that of the impeller 21A of the first embodiment, and other blades The configuration of the wheel 21B is the same as the impeller 21B of the first embodiment. That is, the number of notches of the blades of the impeller 21A arranged in the range corresponding to the auxiliary filter 15 is smaller than the number of notches of the blades of the other impellers 21B.

  In the air flow passage, the range in which the auxiliary filter 15 is disposed has a large ventilation resistance. In the present embodiment, the number of blade notches of the impeller 21 </ b> A disposed in the range corresponding to the auxiliary filter 15. Since there is little, it can suppress that an air volume falls.

<Third Embodiment>
Next, an indoor unit according to a third embodiment of the present invention will be described. However, about the thing which has the structure similar to 1st Embodiment, the description is abbreviate | omitted suitably using the same code | symbol.
The indoor unit of the present embodiment is different from the first embodiment in the configuration of the blower 220, and the other configurations are the same as those in the first embodiment.

  As shown in FIG. 11, the blower 220 of the present embodiment has the same configuration of the impeller 21A arranged in a range corresponding to the electrical component box 10 as the impeller 21A of the first embodiment. The configuration of the impeller 21B is the same as the impeller 21B of the first embodiment. That is, the number of blade notches of the impeller 21A arranged in the range corresponding to the electrical component box 10 is smaller than the number of blade notches of the other impeller 21B.

  In the air flow path, the range in which the electrical component box 10 is disposed has a large ventilation resistance. In this embodiment, the blade notch of the impeller 21A disposed in the range corresponding to the electrical component box 10 is provided. Since there are few numbers of airflow, it can suppress that an air volume falls.

<Fourth embodiment>
Next, an indoor unit according to a fourth embodiment of the present invention will be described. However, about the thing which has the structure similar to 1st Embodiment, the description is abbreviate | omitted suitably using the same code | symbol.
The indoor unit of the present embodiment is different from the first embodiment in the configuration of the blower 320, and the other configurations are the same as those in the first embodiment.

  As shown in FIG. 12, the main body frame 3 has an arcuate wall portion 17 that forms a flow path on the rear side of the blower 320. In the processing step of forming the wall portion 17 in an arc shape, the substantially central portion 17a in the left-right direction of the wall portion 17 may be bent and deformed so as to swell forward. Moreover, the blower outlet unit 8 has the tongue part 18 arrange | positioned along the outer peripheral surface of the air blower 320. FIG. In the processing step of forming the tongue 18 in an arc shape along the outer peripheral surface of the blower 320, the substantially central portion 18 a in the left-right direction of the tongue 18 may be bent and deformed away from the blower 320. In FIG. 12, the amount of deflection of the wall portion 17 and the tongue portion 18 is exaggerated.

  The blower 320 has the same configuration as the impeller 21A of the first embodiment in the configuration of the central impeller disposed at the center in the left-right direction, and the configuration of the other impellers is the same as that of the impeller 21B of the first embodiment. The same. That is, the number of notches in the central impeller is smaller than the number of notches in the other impellers. The number of central impellers may be one or plural. If the impellers with more notches than the central impeller are arranged on both the left and right sides of the central impeller, the central position of the central impeller (if there are multiple central impellers, the position of the central impeller ) May not coincide with the center of the blower 20 in the left-right direction.

  In the vicinity of the central portion 17 a of the wall portion 17, it becomes difficult for the air flow to flow. Moreover, since the center part 18a of the tongue part 18 is separated from the air blower 320, the flow velocity of the airflow blown out from the part facing the center part 18a in the air blower 320 falls. In this embodiment, since there are few notches of the blade | wing of the center impeller arrange | positioned in the range corresponding to the center part 17a of the wall part 17, and the center part 18a of the tongue part 18, it can suppress that an air volume falls. .

<Fifth Embodiment>
Next, an indoor unit according to a fifth embodiment of the invention will be described. However, about the thing which has the structure similar to 1st Embodiment, the description is abbreviate | omitted suitably using the same code | symbol.
The indoor unit of the present embodiment is different from the first embodiment in the configuration of the blower 420 and the heat exchanger 430, and the other configurations are the same as those in the first embodiment.

  As shown in FIGS. 13 and 14, the heat exchanger 430 of the present embodiment includes an auxiliary heat exchanger 430c in addition to the front heat exchanger 30a and the rear heat exchanger 30b. The auxiliary heat exchanger 430c is arranged behind the right half of the rear heat exchanger 30b. The auxiliary heat exchanger 430c has the same length in the left-right direction as the rear heat exchanger 30b, and its width (substantially vertical length) is shorter than that of the rear heat exchanger 30b.

  In the blower 420, the configuration of the impeller 21A disposed in the range corresponding to the auxiliary heat exchanger 430c is the same as the impeller 21A of the first embodiment, and the configuration of the other impeller 21B is the first implementation. It is the same as the impeller 21B of the form. That is, the number of blade notches of the impeller 21A disposed in the range corresponding to the auxiliary heat exchanger 430c is smaller than the number of blade notches of the other impeller 21B.

  In the air flow path, the range in which the auxiliary heat exchanger 430c is disposed has a large ventilation resistance, but in this embodiment, the blades of the impeller 21A disposed in the range corresponding to the auxiliary heat exchanger 430c. Since the number of notches is small, it is possible to suppress a decrease in the air volume.

<Sixth Embodiment>
Next, an indoor unit according to a sixth embodiment of the present invention will be described. However, about the thing which has the structure similar to 1st Embodiment, the description is abbreviate | omitted suitably using the same code | symbol.
The indoor unit of the present embodiment is different from the first embodiment in the configuration of the blower 520 and the casing 502, and the other configurations are the same as those in the first embodiment.

  As in the first embodiment, since the motor 44 and the pipe 42 are disposed on the right side of the indoor unit 501, the blower 520 and the heat exchanger 530 are disposed on the left side (see FIG. 4). In the casing 2 of the first embodiment, the main suction port 2a is formed on the left side, whereas as shown in FIG. 15, in the casing 502 of the present embodiment, the main suction port 502a has a symmetry. It is formed at the center in the left-right direction. The position of the left end of the main suction port 502a is closer to the center than the left end of the main suction port 2a, and the position of the right end of the main suction port 502a is the same as the position of the right end of the main suction port 2a.

  The blower 520 has the same configuration as the impeller 21A of the first embodiment in the configuration of the impeller 21A disposed in a range corresponding to the wall portion 507b provided on the left side of the main suction port 502a. The configuration of the impeller 21B is the same as the impeller 21B of the first embodiment. That is, the number of blade notches of the impeller 21A disposed in the range corresponding to the wall portion 507b is smaller than the number of blade notches of the other impeller 21B.

  In the flow path of the air flow, the range where the wall portion 507b of the main suction port 502a is present has a large ventilation resistance, but in this embodiment, the blade cutting of the impeller 21A disposed in the range corresponding to the wall portion 507b is cut. Since the number of notches is small, it is possible to suppress a decrease in the air volume.

<Seventh embodiment>
Next, an indoor unit according to a seventh embodiment of the present invention will be described. However, about the thing which has the structure similar to 1st Embodiment, the description is abbreviate | omitted suitably using the same code | symbol.
The indoor unit of the present embodiment is different from the first embodiment in the configuration of the blower 620 and the lower filter, and the other configurations are the same as those in the first embodiment.

  As shown in FIG. 16, in the present embodiment, the shapes of the left lower filter 612L and the right lower filter 612R are different from each other. The left lower filter 612L is bent at a substantially central portion in the vertical direction, and a portion below the bent portion is linearly formed. On the other hand, as for the lower filter 612R on the right side, the lower half of the lower filter 612R is formed in an arc shape like the lower filter 12 of the first embodiment. Therefore, the left lower filter 612L is closer to the blower 620 than the right lower filter 612R. Further, the left lower filter 612L has a larger ventilation resistance than the right lower filter 612R.

  The blower 620 has the same configuration of the impeller arranged in the range corresponding to the left lower filter 612L as the impeller 21A of the first embodiment, and the configuration of the other impellers is the same as that of the first embodiment. It is the same as the impeller 21B. That is, the number of notches of the blades of the impeller arranged in the range corresponding to the left lower filter 612L is smaller than the number of notches of the blades of the other impellers.

  In the air flow path, the air flow resistance is increased in the area where the lower filter 612L on the left side is disposed, but in this embodiment, the blade notch of the impeller disposed in the area corresponding to the lower filter 612L Since the number is small, it is possible to suppress a decrease in the air volume.

<Eighth Embodiment>
Next, an indoor unit 701 according to an eighth embodiment of the present invention will be described.
As shown in FIG. 17, the indoor unit 701 of the present embodiment has a horizontally long rectangular parallelepiped shape and is attached to a wall surface in the room. In the following description, the direction protruding from the wall to which the indoor unit 701 is attached is referred to as “front”, and the opposite direction is referred to as “rear”. In addition, the horizontal direction and the vertical direction shown in FIG. 17 are simply referred to as “horizontal direction” and “vertical direction”.

  As shown in FIG. 18, the indoor unit 701 includes a casing 702 and internal devices such as a blower 703, a heat exchanger 705, a filter unit 710, and a cleaning unit 740 accommodated in the casing 702. In this indoor unit 701, the air sucked from the top surface inlet 702a (see FIG. 17) and the front inlet 702b formed on the upper surface of the casing 702 is heated or heated in the heat exchanger 705 by driving the blower 703. After cooling, it blows out from the blower outlet 702c formed in the lower surface of the casing 702.

  The filter unit 710 is disposed between the top surface suction port 702a and the front surface suction port 702b and the heat exchanger 705. The filter unit 710 includes two filters 720 arranged side by side in the left-right direction, a frame unit 730 that movably houses the filter 720, and a drive mechanism that moves the filter 720 in a predetermined movement direction inside the frame unit 730. 711. As shown in FIG. 19, a cover member 714 is disposed between the two filters 720.

  As shown in FIG. 20, the filter 720 includes a frame body 721 and a filter body 722 stretched inside the frame body 721. As shown in FIG. 21, rack portions 721 a that mesh with pinions 713 of a drive mechanism 711 described later are formed at both ends in the width direction of the frame body 721.

  As shown in FIG. 18, the frame unit 730 is formed with a movement path (normal guide path 730a, turn-back guide path 730b, and retraction guide path 730c) of the filter 720 accommodated therein. Here, the normal guide path 730a is provided on the top surface suction port 702a and the front surface suction port 702b side, and the retraction guide path 730c is provided on the heat exchanger 705 side. The folded guide path 730b connects the normal guide path 730a and the retreat guide path 730c described above at the lower part of the frame unit 730. During the air conditioning operation, the filter 720 is disposed in the normal guide path 730a, and when the filter 720 is automatically cleaned by a cleaning unit 740 described later, the filter 720 moves between the normal guide path 730a and the retraction guide path 730c.

  The frame unit 730 includes a guide member 731 that forms a normal guide path 730a, an under cover 732 that forms a folded guide path 730b, and a retraction guide path 730c that forms an id member 733, a guide member 731, and a guide member 733. And a partition member 734 disposed therebetween. A pinion 713 of a drive mechanism 711 described later is disposed between the under cover 732 and the partition member 734. The under cover 732 is opened so that a rotating brush 741 of a cleaning unit 740, which will be described later, contacts the filter 720 that passes through the folded guide path 730b. Further, two guide members 731 at the center of the four guide members 731 are constituted by both end portions of the cover member 714 in the left-right direction.

The drive mechanism 711 moves the filter 720 between the normal guide path 730a and the retraction guide path 730c so that the entire area of the filter 720 contacts a rotating brush 741 of the cleaning unit 740 described later when the filter 720 is automatically cleaned. Move.
The drive mechanism 711 includes a motor 712 (see FIG. 19) and a pinion 713 (see FIGS. 18 and 20) that is rotationally driven by the motor 712. As shown in FIG. 20, the pinions 713 are arranged at the left and right ends of the filter 720. The motor 712 is provided for each filter 720, and the right motor 712 is disposed so as to protrude from the right end of the cover member 714 (see FIG. 19).

  The cleaning unit 740 is provided to remove dust adhering to the filter 720. As shown in FIG. 18, the cleaning unit 740 has a rotating brush 741 extending in the left-right direction, and a comb member for scraping dust attached to the rotating brush 741 742, a compression rod 743 provided near the front of the comb member 742, a dust box 744 for storing dust compressed between the compression rod 743 and the comb member 742, a rotating brush 741, and a compression rod 743. And a motor 745 for rotating the motor.

  The rotating brush 741 is rotatably supported at both ends, and as shown in FIG. 20, brush bristles 741a are provided at portions excluding both ends and the center. A driving gear 741 b that is driven to rotate by a motor 745 is attached to the center of the rotating brush 741. Note that the rotation direction of the rotating brush 741 is opposite to the rotation direction of the pinion 713 that moves the filter 720.

  The compression rod 743 is disposed below the rotating brush 741, and both ends thereof are rotatably supported. A driven gear 743 a that meshes with the drive gear 741 b is attached to the central portion of the compression rod 743.

  When the air conditioning operation ends, the motor 712 of the drive mechanism 711 of the filter unit 710 is driven to rotate the pinion 713, and the motor 745 of the cleaning unit 740 is driven to rotate the rotating brush 741 and the compression rod 743. As a result, the filter 720 moves from the normal guide path 730a to the retraction guide path 730c via the return guide path 730b. When the filter 720 passes through the folding guide path, dust attached to the filter body 722 is removed by the rotating brush 741.

  The blower 703 is configured by a cross flow fan, and sucks air from the upper front and blows it out to the lower rear. As illustrated in FIG. 22, the blower 703 includes a plurality of impellers 704 arranged on the same rotation axis. Among the plurality of impellers 704, the cover member 714, the motor (drive mechanism) 712, and the impeller 704A arranged in a range corresponding to the motor 745 have the same configuration as the impeller 21A of the first embodiment. The impeller 704B has the same configuration as the impeller 21B of the first embodiment. That is, the number of blade notches of the impeller 704A disposed in the range corresponding to the cover member 714 and the motors 712 and 745 is smaller than the number of blade notches of the other impeller 704B.

  In the air flow path, the range corresponding to the cover member 714 and the motors 712 and 745 has a large ventilation resistance, but in this embodiment, the number of blade notches of the impeller 704A arranged in this range is Since there are few, it can suppress that an air volume falls.

<Ninth Embodiment>
Next, an indoor unit 801 according to a ninth embodiment of the present invention will be described.
As shown in FIG. 23, the indoor unit 801 of this embodiment is a horizontally long rectangular parallelepiped like the indoor unit of 8th Embodiment, and is attached to the wall surface of a room. In FIG. 23, hatching is omitted.

  As shown in FIG. 23, the indoor unit 801 includes a casing 802 and internal devices such as a blower 803, a heat exchanger 805, and an additional function unit (additional function unit) 806 housed in the casing 802. In this indoor unit 801, the air sucked from the suction port 802 a formed on the upper surface of the casing 802 is heated or cooled in the heat exchanger 805 by driving the blower 803, and then formed on the lower surface of the casing 802. It blows out from the blower outlet 802b.

  The additional function unit 806 is disposed between a heat exchanger 805 and a filter (not shown) disposed to face the suction port 802a. The additional function unit 806 is an air cleaning unit having an air cleaning function, and can clean the air passing through the additional function unit 806 by generating a streamer discharge. The additional function unit 806 contains a discharge electrode for generating streamer discharge, a counter electrode, a filter, and the like. As shown in FIG. 24, the additional function unit 806 is arranged in a substantially half range on the right side of the air flow channel.

  The blower 803 is configured by a cross flow fan, and sucks air from the upper front and blows it out to the lower rear. As shown in FIG. 25, the blower 803 has a plurality of impellers 804 arranged on the same rotation axis. Of the plurality of impellers 804, the impeller 804A arranged in a range corresponding to the additional function unit 806 has the same configuration as the impeller 21A of the first embodiment, and the other impellers 804B are the same as those of the first embodiment. This is the same configuration as the impeller 21B. That is, the number of blade notches of the impeller 804A arranged in the range corresponding to the additional function unit 806 is smaller than the number of blade notches of the other impeller 804B.

  In the air flow path, the range corresponding to the additional function unit 806 has a large ventilation resistance. However, in this embodiment, since the number of blade notches of the impeller 804A arranged in this range is small, the air volume Can be suppressed.

  In the present embodiment, the additional function unit 806 is an air cleaning unit having an air cleaning function by streamer discharge, but may have an air cleaning function by other principles. The air cleaning function based on other principles includes, for example, a dust collecting function for collecting dust by charging passing dust. Further, it may be an additional function unit for adding other functions instead of the air cleaning function.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  In the above-described embodiment, the shapes of the notches 26 and 28 of the blade 22 are substantially triangular. However, the shape is not limited to this shape, and may be a trapezoidal shape, an arc shape, a square shape, or the like.

  In the above embodiment, the impeller 21A having a small number of cutouts has one cutout 28 formed on each blade 22A, but the cutout may not be formed at all. A plurality of notches may be formed in each blade 22A.

  In the said embodiment, although several blade | wings which comprise one impeller are all the same shapes, you may differ. For example, blades having one or a plurality of cutouts and blades not having a cutout may be alternately arranged. However, the total number of notches of an impeller with a small number of notches is less than the total number of notches of an impeller with a large number of notches.

  In the said embodiment, although several impeller 21B (or several impeller 21A) is all the same shapes, you may differ. For example, the number of notches in each blade may be different for each impeller.

  In the above-described embodiment, the notches 26 and 28 are formed at the outer peripheral wing tip of the blade 22, but the notch may be formed at the inner peripheral wing tip of the blade 22. A plurality of notches may be formed on both the outer peripheral wing tip and the inner peripheral wing tip.

  In the said embodiment, although the case where the crossflow fan was used was mentioned as an example and demonstrated as the air blower 20 of this invention, the air blower 20 is not limited to this. The blower 20 only needs to have a plurality of impellers arranged on the same rotation axis, and may be, for example, a sirocco fan or a turbo fan.

  The flow path resistance portion of the present invention is not limited to that described in the above embodiment. For example, in the eighth embodiment, the cover member 714 and the motors 712 and 745 constitute the flow path resistance portion of the present invention, but only the cover member 714 constitutes the flow path resistance portion of the present invention. Good. That is, the impeller 704 </ b> A having a small number of notches may be disposed only in a range corresponding to the cover member 714.

  By using the present invention, it is possible to suppress a reduction in air volume in the indoor unit.

1, 701, 801 Indoor unit 2, 502, 702, 802 Casing 10 Electrical component box 11, 12, 612L, 612R, 720 Filter 14 Filter body 15 Auxiliary filter 20, 120, 220, 320, 420, 520, 620, 703 , 803 Blower 21 (21A, 21B), 704 (704A, 704B), 804 (804A, 804B) Impeller 22 (22A, 22B) Blade 26, 28 Notch 30, 430, 705, 805 Heat exchanger,
30a Front heat exchanger (main heat exchanger)
30b Rear heat exchanger (main heat exchanger)
31 Fin 32 Hairpin tube 32a Straight line portion 32b Curved portion 430c Auxiliary heat exchanger 502a Main suction port (suction port)
507b Wall part 710 Filter unit 711 Drive mechanism 712 Motor 714 Cover member 740 Cleaning unit 745 Motor 806 Additional function unit (additional function part)

  The present invention relates to an indoor unit including a blower having a plurality of impellers.

  Conventionally, an air conditioner indoor unit uses a blower such as a cross flow fan having a plurality of impellers arranged on the same rotation shaft. Usually, notches are formed in the blade tips on the outer peripheral side and / or inner peripheral side of a plurality of blades constituting the impeller in order to reduce noise due to airflow (see, for example, Patent Document 1). .

  Moreover, the indoor unit is equipped with the heat exchanger in the flow path of the airflow which generate | occur | produces with an air blower. The air sucked from the room by the blower is heat-exchanged with the refrigerant through the heat exchanger and then blown out into the room. As the heat exchanger, one having a large number of fins arranged in parallel and a plurality of hairpin tubes penetrating through the large number of fins is used. When manufacturing a heat exchanger, after inserting a hairpin tube with a large number of fins with holes formed through which the hairpin tube is inserted in parallel, the hairpin tube is inserted into the hairpin tube. The tube is expanded to fix the fin and the hairpin tube, and then the tube expansion jig is pulled out. As the tube expanding jig is inserted and pulled out, the fin pitch on the curved portion side of the hairpin tube may become narrower than the fin pitch of other portions among the large number of fins.

JP 63-124899 A

Although notches are provided in the blades of the blower, noise can be prevented, but the air volume is reduced. For this reason, as described above, if the heat exchanger has a portion with a narrow fin pitch, the ventilation resistance increases in this portion, which causes a problem that the air volume becomes too small.
In addition to heat exchangers, the same problem arises when components with different ventilation resistance are arranged in the longitudinal direction of the blower.

  Accordingly, an object of the present invention is to provide an indoor unit that can suppress a reduction in air volume.

An indoor unit according to a first aspect of the present invention includes a blower and a heat exchanger disposed in a flow path of an air flow generated by the blower, and the air flow path has a longitudinal direction of the blower. There is a flow path resistance portion arranged in a range corresponding to the portion, and the blower has two or more blades and a plurality of impellers provided on the same rotation axis, The impeller includes a plurality of types of impellers having different number of blade notches, and the number of blade notches per predetermined length of the impeller arranged in a range corresponding to the flow path resistance portion is Fewer than the number of blade notches per predetermined length of other impellers .

  In this indoor unit, in the longitudinal direction of the blower, the air volume of the part of the impeller having a small number of blade notches among the plurality of impellers is larger than the air volume of the other impeller parts. Therefore, when the ventilation resistance of the air flow is different with respect to the longitudinal direction of the blower, it is possible to suppress a decrease in the air volume by changing the number of notches according to the ventilation resistance.

The “number of blade cutouts provided in the impeller” is the total number of cutouts formed on the outer peripheral wing tip and the inner peripheral wing tip of all the blades of the impeller.
In addition, “the number of blade notches provided in one impeller is less than the number of blade notches provided in another impeller” means that “the other impeller” is a plurality. It means that the number of notches of “one impeller” is smaller than all the impellers of the plurality of impellers.
Further, the small number of notches includes the case where the number of notches is zero.

  In this indoor unit, since the number of notches of the blades of the impeller arranged in a range corresponding to the flow path resistance portion is small, it is possible to suppress a decrease in the air volume. Moreover, since impellers other than this impeller have many notches, the noise by an airflow can be reduced as a whole.

An indoor unit according to a second invention is the indoor unit according to the first invention, wherein the heat exchanger has a hairpin tube that penetrates a plurality of fins, and the flow path resistance portion is the It is a portion adjacent to the curved portion of the hairpin tube.

  In this indoor unit, even if the fin pitch is narrow in the portion adjacent to the curved portion of the hairpin tube among the plurality of fins, since the number of notches of the impeller blades arranged in the range corresponding to this portion is small, It is possible to suppress a decrease in the air volume.

An indoor unit according to a third invention is characterized in that, in the second invention, the impeller having a small number of blade notches has a portion that does not face the fin.

  In this indoor unit, since a part of the impeller having blades with few notches is arranged outside the fins of the heat exchanger, the fins are adjacent to the curved portion of the hairpin tube among the plurality of fins. Even when the pitch is narrow, it is possible to effectively suppress the decrease in the air volume.

An indoor unit according to a fourth invention is the indoor unit according to the first invention, comprising a plurality of filters arranged side by side in the longitudinal direction of the blower in the air flow passage, wherein the flow passage resistance portion is the plurality of filters. Among these, the filter is the closest to the blower.

  In this indoor unit, the distance from the blower is the shortest among the plurality of filters, and the number of notches of the impeller blades arranged in the range corresponding to the filter with the largest ventilation resistance is small, so the air volume is reduced. Can be suppressed.

In the indoor unit according to a fifth aspect of the present invention, in the first aspect , an electrical component box disposed in a range corresponding to a part of a longitudinal direction of the blower is provided in the flow path of the air flow, The flow path resistance portion is the electrical component box.

  In this indoor unit, since the number of notches of the blades of the impeller arranged in a range corresponding to the electrical component box is small, it is possible to suppress a decrease in the air volume.

In the indoor unit according to a sixth aspect of the present invention, in the first aspect , the heat exchanger is stacked on the main heat exchanger and the main heat exchanger, and is in a range corresponding to a part of the blower in the longitudinal direction. And an auxiliary heat exchanger arranged, and the flow path resistance portion is the auxiliary heat exchanger.

  In this indoor unit, since there are few notches of the blade | wing of the impeller arrange | positioned in the range corresponding to an auxiliary heat exchanger, it can suppress that an air volume falls.

An indoor unit according to a seventh aspect includes, in the first aspect , a filter provided in the air flow channel, and the filter is disposed in a range corresponding to a part in a longitudinal direction of the blower. Auxiliary filters are stacked, and the flow path resistance portion is the auxiliary filter.

  In this indoor unit, since the number of notches of the blades of the impeller arranged in a range corresponding to the auxiliary filter is small, it is possible to suppress a decrease in the air volume.

In the indoor unit according to an eighth aspect of the present invention, in the first aspect , the air flow channel is provided with an additional function unit arranged in a range corresponding to a part of the longitudinal direction of the blower, The flow path resistance part is the additional function part.

  In this indoor unit, since there are few notches of the blade | wing of the impeller arrange | positioned in the range corresponding to an additional function part, it can suppress that an air volume falls.

Indoor unit according to the ninth invention, in the first invention, comprising a casing having a suction port for sucking air to be supplied to the blower, the flow path resistance portion, the longitudinal direction of the blower of the suction port It is the wall part provided in the outer side, It is characterized by the above-mentioned.

  In this indoor unit, since there are few notches of the blade | wing of the impeller arrange | positioned in the range corresponding to the wall part of the said longitudinal direction outer side of a suction inlet, it can suppress that an air volume falls.

An indoor unit according to a tenth aspect of the present invention is the indoor unit according to the first aspect , wherein the indoor unit is disposed in a range corresponding to a part of a longitudinal direction of the blower and a filter provided in the air flow path, and moves the filter. And the flow path resistance portion is the drive mechanism.

  In this indoor unit, since the number of notches of the blades of the impeller arranged in a range corresponding to the drive mechanism is small, it is possible to suppress a decrease in the air volume.

  As described above, according to the present invention, the following effects can be obtained.

  In the first aspect of the invention, in the longitudinal direction of the blower, the air volume of the portion of the impeller having a small number of blade notches among the plurality of impellers is larger than the air volume of the other impeller portions. Therefore, when the ventilation resistance of the air flow is different with respect to the longitudinal direction of the blower, it is possible to suppress a decrease in the air volume by changing the number of notches according to the ventilation resistance.

In 1st invention, since there are few notches of the blade | wing of the impeller arrange | positioned in the range corresponding to a flow-path resistance part, it can suppress that an air volume falls. Moreover, since impellers other than this impeller have many notches, the noise by an airflow can be reduced as a whole.

In the second invention, even if the fin pitch is narrow in the portion adjacent to the curved portion of the hairpin tube among the plurality of fins, the number of notches of the impeller blades arranged in the range corresponding to this portion is small. It is possible to suppress a decrease in the air volume.

In 3rd invention, since a part of impeller which has a blade | wing with few notches is arrange | positioned outside the fin of a heat exchanger, in the part adjacent to the curved part of a hairpin tube among several fins Even when the fin pitch is narrow, it is possible to effectively suppress the decrease in the air volume.

In the fourth invention, since the number of notches of the blades of the impeller disposed in the range corresponding to the filter having the largest ventilation resistance is the shortest among the plurality of filters, the air volume is reduced. Can be suppressed.

In 5th invention, since there are few notches of the blade | wing of the impeller arrange | positioned in the range corresponding to an electrical component box, it can suppress that an air volume falls.

In 6th invention, since there are few notches of the blade | wing of the impeller arrange | positioned in the range corresponding to an auxiliary heat exchanger, it can suppress that an air volume falls.

In 7th invention, since there are few notches of the blade | wing of the impeller arrange | positioned in the range corresponding to an auxiliary filter, it can suppress that an air volume falls.

In the eighth invention, since the number of notches of the impeller blades arranged in the range corresponding to the additional function unit is small, it is possible to suppress a reduction in the air volume.

In 9th invention, since there are few notches of the blade | wing of the impeller arrange | positioned in the range corresponding to the wall part of the said longitudinal direction outer side of a suction inlet, it can suppress that an air volume falls.

In the tenth aspect , since the number of notches of the impeller blades arranged in the range corresponding to the drive mechanism is small, it is possible to suppress a reduction in the air volume.

It is a perspective view of the indoor unit concerning a 1st embodiment of the present invention. It is sectional drawing which follows the AA line shown in FIG. It is a front view which shows the state which removed the open / close panel from the indoor unit shown in FIG. It is a partial exploded perspective view of the indoor unit shown in FIG. It is a partial exploded perspective view of the indoor unit shown in FIG. (A) is a top view of a heat exchanger and an air blower, (b) is a front view of (a). It is the front view which showed the heat exchanger and the air blower typically. It is a partial expansion perspective view of an air blower. It is sectional drawing of an air blower. It is a figure which shows the positional relationship of the air blower of an indoor unit and auxiliary filter which concern on 2nd Embodiment of this invention. It is a figure which shows the positional relationship of the air blower of an indoor unit and electrical component box which concern on 3rd Embodiment of this invention. It is sectional drawing of the indoor unit which concerns on the reference example of this invention. It is sectional drawing of the indoor unit which concerns on 4th Embodiment of this invention. It is a figure which shows the positional relationship of the air blower and auxiliary heat exchanger of an indoor unit shown in FIG. It is a front view of the indoor unit which concerns on 5th Embodiment of this invention. It is sectional drawing of the indoor unit which concerns on 6th Embodiment of this invention. It is a perspective view of the indoor unit which concerns on 7th Embodiment of this invention. It is sectional drawing which follows the BB line shown in FIG. It is a perspective view of the filter unit shown in FIG. It is a figure which shows the positional relationship of the filter, rotary brush, and compression rod of the indoor unit shown in FIG. It is a perspective view which shows the meshing state of the rack part and pinion of the filter of the indoor unit shown in FIG. It is a figure which shows the positional relationship of the air blower and drive mechanism of an indoor unit shown in FIG. It is sectional drawing of the indoor unit which concerns on 8th Embodiment of this invention. It is a fragmentary perspective view of the indoor unit shown in FIG. It is a figure which shows the positional relationship of the air blower and additional function unit of an indoor unit shown in FIG.

<First Embodiment>
Hereinafter, a floor-standing indoor unit 1 (hereinafter simply referred to as “indoor unit 1”) according to a first embodiment of the present invention will be described.
The indoor unit 1 constitutes an air conditioner together with an outdoor unit (not shown), and performs indoor air conditioning. As shown in FIG. 1, the indoor unit 1 of the present embodiment has a rectangular parallelepiped shape as a whole, and is installed on a wall surface in a state of floating from the indoor floor surface. In the present embodiment, the height H (see FIG. 1) of the indoor unit 1 from the floor is about 2 cm. In the following description, the direction protruding from the wall to which the indoor unit 1 is attached is referred to as “front”, and the opposite direction is referred to as “rear”. Further, the left-right direction and the up-down direction shown in FIG. 1 are simply referred to as “left-right direction” and “up-down direction”.

  As shown in FIG. 2, the indoor unit 1 includes a casing 2 and internal devices such as a blower 20, a heat exchanger 30, and an electrical component box 10 accommodated in the casing 2. In this indoor unit 1, the auxiliary suction port 2 b formed on the front wall of the casing 2 while sucking air in the vicinity of the floor surface from the main suction port 2 a formed on the lower wall of the casing 2 by driving the blower 20. Inhale air from 2c. The sucked air is heated or cooled in the heat exchanger 30 and then blown out from the air outlet 2d formed on the upper wall of the casing 2.

  The casing 2 includes a main body frame 3 (see FIG. 4), an outlet cover 4 (see FIG. 5) disposed in front of the main body frame 3, a radiation panel 5 (see FIG. 5), and an open / close panel 6 (see FIG. 5). ). The main body frame 3 is a substantially rectangular box having an open front, and is attached to a wall surface, supporting the various internal devices described above.

  As shown in FIG. 3, the air outlet cover 4 is disposed in front of the upper end portion of the main body frame 3. On the upper surface of the outlet cover 4, an outlet 2 d that is a rectangular opening that is long in the left-right direction is formed. A radiation panel 5 is disposed below the outlet cover 4.

  The open / close panel 6 is disposed below the radiation panel 5 and is detachable from the front grille 7 attached to the main body frame 3. As shown in FIG. 3, the filters 11 and 12 can be attached and detached by removing the open / close panel 6. Further, between the radiation panel 5 and the open / close panel 6, an auxiliary suction port 2b which is a slit-like opening long in the left-right direction (horizontal direction) is formed. In the vicinity of the upper end of the open / close panel 6, an auxiliary suction port 2c, which is a slit-like opening long in the left-right direction, is formed. Further, a main suction port 2 a that is an opening that is long in the left-right direction is formed at the lower end of the front grill 7. The main suction port 2 a is located between the lower end of the open / close panel 6 and the main body frame 3. The main suction port 2a, the auxiliary suction ports 2b and 2c, and the outlet 2d have substantially the same length in the left-right direction. The auxiliary suction ports 2b and 2c may not be provided.

  The blower 20 is disposed slightly above the central portion in the height direction of the casing 2. The blower 20 is configured by a cross flow fan, and is arranged such that its axial direction is along the left-right direction. The blower 20 sucks air from the lower front and blows it upward and backward. The detailed configuration of the blower 20 will be described later.

  An air outlet unit 8 is disposed above the blower 20, and the air outlet unit 8 is covered with an air outlet cover 4. The air blown out from the blower 20 is guided to the air outlet 2 d provided in the air outlet cover 4 through a flow path formed between the air outlet unit 8 and the main body frame 3. The blower outlet unit 8 includes a horizontal flap 8a disposed in the vicinity of the blower outlet 2d. The horizontal flap 8a changes the airflow direction of the airflow blown from the air outlet 2d and opens and closes the air outlet 2d.

  The heat exchanger 30 includes a front heat exchanger 30a and a rear heat exchanger 30b that are arranged in a V shape so as to surround the front and lower sides of the blower 20. The front heat exchanger 30 a is parallel to the front surface of the casing 2 and is disposed in front of the blower 20, and the upper half thereof faces the blower 20. The rear heat exchanger 30b is inclined upward as it approaches the back surface from the vicinity of the lower end of the front heat exchanger 30a, and is disposed below the blower 20. The detailed configuration of the heat exchanger will be described later.

  The radiation panel 5 constitutes a part of the front portion of the casing 2. The radiant panel 5 has a panel pipe 5a through which the refrigerant flows. Radiant heating is performed by radiating the heat of the refrigerant flowing through the panel pipe 5a into the room.

  The front grille 7 is attached to the main body frame 3 so as to cover from the substantially vertical central portion of the front heat exchanger 30a to the lower end of the main body frame 3. The front grille 7 has a filter holding part 7a. The left and right upper filters 11 and the left and right lower filters 12 are held in the filter holding portion 7a. Note that only the lower part of the upper filter 11 is held by the filter holding part 7 a, and the upper part is held by the radiation panel 5.

  The upper filter 11 and the lower filter 12 have a frame body 13 and a filter main body 14 formed of a net stretched inside the frame body 13. An auxiliary filter holding portion 13 a is provided at the center of the frame 13 of the lower filter 12. The filter body 14 constitutes the filter of the present invention.

  The auxiliary filter 15 is held in the auxiliary filter holding portion 13a. The auxiliary filter 15 is disposed behind the filter body 14 and captures particulates in the air such as pollen and dust that cannot be captured by the filter body 14. As the auxiliary filter 15, an electrostatic filter, a photocatalytic filter, or the like is used. The auxiliary filter 15 is shorter than the filter main body 14 in the left-right direction, and is arranged at a substantially central portion of the filter main body 14 in the left-right direction.

  The electrical component box 10 is installed in a flow path from the main suction port 2a to the rear heat exchanger 30b, and accommodates a circuit board and the like. The electrical component box 10 is disposed in a range corresponding to the substantially right half of the blower 20 in the left-right direction.

Next, details of the heat exchanger will be described.
As shown in FIG. 4 and FIG. 6, a pipe 42 for supplying the refrigerant sent from the outdoor unit to the heat exchanger 30 and the radiation panel 5 is arranged on the right side of the heat exchanger 30. An attachment portion 43 for attachment to the main body frame 3 is provided at the left end portion of the heat exchanger 30. A motor cover 45 that supports the fan motor 44 is attached to the right end portion of the heat exchanger 30, and the right end portion of the heat exchanger 30 is attached to the main body frame 3 via the motor cover 45.

  As shown in FIG. 7, the heat exchanger 30 (the front heat exchanger 30 a and the back heat exchanger 30 b) includes a plurality of fins 31 that are arranged in parallel in the left-right direction and a plurality of fins 31 that penetrate the many fins 31. It has a hairpin tube 32 and a connecting tube 33 that connects adjacent hairpin tubes 32 to each other.

  A large number of fins 31 are arranged in parallel in the left-right direction. Each fin 31 is formed with a plurality of through holes (not shown) through which the hairpin tube 32 penetrates, and a fin collar (not shown) is erected on the peripheral edge of the through hole. A large number of fins 31 are opposed to the blower 20. Specifically, the leftmost fin 31 among the multiple fins 31 is located on the right side of the left end of the blower 20.

  The hairpin tube 32 includes two straight portions 32a and a curved portion 32b extending in parallel. In the hairpin tube 32, the straight portion 32a extends in the left-right direction, and the curved portion 32b is disposed on the left side of the straight portion 32a. The straight portion 32 a passes through a large number of fins 31, and the curved portion 32 b is located on the left side of the leftmost fin 31. As shown in FIG. 6B, the bending portion 32 b is covered with a bending portion cover 46. As shown in FIG. 2, in the present embodiment, the front heat exchanger 30 a has twelve hairpin tubes 32, and the rear heat exchanger 30 b has six hairpin tubes 32.

  The connecting tube 33 is formed in a U shape, and both ends thereof are connected at the right end of the adjacent hairpin tube 32. Accordingly, the plurality of hairpin tubes 32 communicate with each other via the connecting tube 33, and the hairpin tubes 32 at both ends are connected to a pipe 42 disposed on the right side of the heat exchanger 30.

  As a manufacturing procedure of the front heat exchanger 30a and the back heat exchanger 30b, first, the straight portion 32a of the hairpin tube 32 is inserted through the through holes of a large number of fins 31 arranged in parallel at equal intervals. Next, the linear portion 32a and the fin 31 are fixed by pushing the tube expansion jig having a slightly larger diameter than the linear portion 32a into the linear portion 32a to expand the linear portion 32a. Thereafter, the tube expansion jig is pulled out from the hairpin tube 32. Along with the insertion and withdrawal of the tube expansion jig, the fin pitch of the plurality of fins 31 on the curved portion 32b side is narrower than the fin pitch of the other portions.

Next, details of the blower 20 will be described.
As shown in FIG. 4, a fan motor 44 for driving the blower 20 is disposed on the right side of the blower 20. The fan motor 44 is attached to the main body frame 3 via a motor cover 45. Further, the right end portion of the blower 20 (specifically, an end plate 24 to be described later and a part of the right end impeller 21 </ b> B) includes a semicircular recess 45 a formed in the motor cover 45, and the right side of the main body frame 3. It arrange | positions between the semicircle-shaped recessed parts 3a formed in the part. Further, the left end portion of the blower 20 (specifically, an end plate 25 described later and a part of the left end impeller 21A) includes a semicircular recess 43a formed in the mounting portion 43 of the heat exchanger 30, and It arrange | positions between the semicircle-shaped recessed parts 3b formed in the left side part of the main body frame 3. As shown in FIG.

  As shown in FIGS. 4 and 8, the blower 20 includes a plurality of impellers 21 disposed on the same rotation shaft, a plurality of annular plates 23 disposed between adjacent impellers 21, and a plurality of blades. Circular end plates 25, 24 arranged at the left and right ends of the vehicle 21 are provided. As shown in FIG. 9, a cylindrical boss portion 24 a into which the rotation shaft of the fan motor 44 is inserted is provided at the center portion of the right end plate 24 so as to protrude rightward. A shaft portion 25a supported by a bearing portion 3c (see FIG. 4) formed on the main body frame 3 is provided at the center portion of the left end plate 25 so as to protrude leftward.

  As shown in FIG. 8, the impeller 21 includes a plurality of blades 22 arranged side by side in the circumferential direction on the side surface of the annular plate 23. Each blade 22 has a predetermined blade angle and extends parallel to the rotation axis direction (left-right direction). Moreover, as shown in FIG. 9, the shape of the blade 22 is different between the leftmost impeller 21A and the plurality of impellers 21B other than the impeller 21A. In FIG. 9, only the upper and lower blades 22 are shown, and the other blades 22 are omitted.

  As shown in FIG. 9, a plurality of substantially triangular cutouts 26 are formed on the outer wing tip of each blade 22B of the impeller 21B. Between adjacent notches 26 is formed by a smoothing portion 27 extending in the left-right direction. By providing a plurality of notches 26 in the blade 22B, noise due to airflow is reduced. The inner peripheral wing tip of each blade 22B extends in the left-right direction.

  Further, only one substantially triangular cutout 28 is formed at the outer wing tip of each blade 22A of the leftmost impeller 21A. The portion other than the notch 28 is constituted by a smoothing portion 29 extending in the left-right direction. Further, the inner peripheral wing tip of each blade 22A extends in the left-right direction. Since the impeller 21A has fewer notches than the impeller 21B, the noise caused by the air flow is larger than that of the impeller 21B, but the air volume is larger than that of the impeller 21B.

  As described above, the fin pitch is narrow in the vicinity of the curved portion 32 b of the hairpin tube 32 among the plurality of fins 31. The impeller 21 </ b> A faces the above-described narrow fin pitch portion of the heat exchanger 30. The portion with a narrow fin pitch has a large ventilation resistance. However, since the impeller 21A with few notches is arranged as the impeller 21 facing this portion, all the impellers 21 are configured by the impeller 21B. Compared with the case, it is possible to suppress a decrease in the air volume. Further, since the impeller 21B other than the impeller 21A has a large number of notches, the noise due to the airflow can be reduced as a whole.

  Moreover, in this indoor unit 1, since the left end part of the impeller 21A is arranged outside the left end fin 31 in the heat exchanger 30, even if the fin pitch of the left part of the heat exchanger 30 is narrow, It is possible to effectively suppress the decrease in the air volume.

  In addition, in this embodiment, although the heat exchanger 30 is formed in V shape, the plate shape arrange | positioned substantially parallel to the front surface of the casing 2 may be sufficient as the whole heat exchanger.

Second Embodiment
Next, an indoor unit according to a second embodiment of the present invention will be described. However, about the thing which has the structure similar to 1st Embodiment, the description is abbreviate | omitted suitably using the same code | symbol.
1st Embodiment mentioned above is a structure for preventing the part which adjoins the curved part 32b of the hairpin tube 32 among several fins 31 becomes flow-path resistance, and the air volume falls, but the following 1st The second to eighth embodiments are configurations for preventing a decrease in the air volume caused by other flow path resistance units.
The indoor unit of the present embodiment is different from the first embodiment in the configuration of the blower 120, and the other configurations are the same as those in the first embodiment.

  As shown in FIG. 10, in the blower 120 of the present embodiment, the configuration of the impeller 21A arranged in a range corresponding to the auxiliary filter 15 is the same as that of the impeller 21A of the first embodiment, and other blades The configuration of the wheel 21B is the same as the impeller 21B of the first embodiment. That is, the number of notches of the blades of the impeller 21A arranged in the range corresponding to the auxiliary filter 15 is smaller than the number of notches of the blades of the other impellers 21B.

  In the air flow passage, the range in which the auxiliary filter 15 is disposed has a large ventilation resistance. In the present embodiment, the number of blade notches of the impeller 21 </ b> A disposed in the range corresponding to the auxiliary filter 15. Since there is little, it can suppress that an air volume falls.

<Third Embodiment>
Next, an indoor unit according to a third embodiment of the present invention will be described. However, about the thing which has the structure similar to 1st Embodiment, the description is abbreviate | omitted suitably using the same code | symbol.
The indoor unit of the present embodiment is different from the first embodiment in the configuration of the blower 220, and the other configurations are the same as those in the first embodiment.

  As shown in FIG. 11, the blower 220 of the present embodiment has the same configuration of the impeller 21A arranged in a range corresponding to the electrical component box 10 as the impeller 21A of the first embodiment. The configuration of the impeller 21B is the same as the impeller 21B of the first embodiment. That is, the number of blade notches of the impeller 21A arranged in the range corresponding to the electrical component box 10 is smaller than the number of blade notches of the other impeller 21B.

  In the air flow path, the range in which the electrical component box 10 is disposed has a large ventilation resistance. In this embodiment, the blade notch of the impeller 21A disposed in the range corresponding to the electrical component box 10 is provided. Since there are few numbers of airflow, it can suppress that an air volume falls.

<Reference example>
Next, an indoor unit according to a reference example of the present invention will be described. However, about the thing which has the structure similar to 1st Embodiment, the description is abbreviate | omitted suitably using the same code | symbol.
The indoor unit of this reference example is different from the first embodiment in the configuration of the blower 320, and the other configurations are the same as those in the first embodiment.

  As shown in FIG. 12, the main body frame 3 has an arcuate wall portion 17 that forms a flow path on the rear side of the blower 320. In the processing step of forming the wall portion 17 in an arc shape, the substantially central portion 17a in the left-right direction of the wall portion 17 may be deformed so as to swell forward. Moreover, the blower outlet unit 8 has the tongue part 18 arrange | positioned along the outer peripheral surface of the air blower 320. FIG. In the processing step of forming the tongue 18 in an arc shape along the outer peripheral surface of the blower 320, the substantially central portion 18 a in the left-right direction of the tongue 18 may be bent and deformed away from the blower 320. In FIG. 12, the amount of deflection of the wall portion 17 and the tongue portion 18 is exaggerated.

  The blower 320 has the same configuration as the impeller 21A of the first embodiment in the configuration of the central impeller disposed at the center in the left-right direction, and the configuration of the other impellers is the same as that of the impeller 21B of the first embodiment. The same. That is, the number of notches in the central impeller is smaller than the number of notches in the other impellers. The number of central impellers may be one or plural. If the impellers with more notches than the central impeller are arranged on both the left and right sides of the central impeller, the central position of the central impeller (if there are multiple central impellers, the position of the central impeller ) May not coincide with the center of the blower 20 in the left-right direction.

  In the vicinity of the central portion 17 a of the wall portion 17, it becomes difficult for the air flow to flow. Moreover, since the center part 18a of the tongue part 18 is separated from the air blower 320, the flow velocity of the airflow blown out from the part facing the center part 18a in the air blower 320 falls. In this embodiment, since there are few notches of the blade | wing of the center impeller arrange | positioned in the range corresponding to the center part 17a of the wall part 17, and the center part 18a of the tongue part 18, it can suppress that an air volume falls. .

< Fourth embodiment>
Next, an indoor unit according to a fourth embodiment of the present invention will be described. However, about the thing which has the structure similar to 1st Embodiment, the description is abbreviate | omitted suitably using the same code | symbol.
The indoor unit of the present embodiment is different from the first embodiment in the configuration of the blower 420 and the heat exchanger 430, and the other configurations are the same as those in the first embodiment.

  As shown in FIGS. 13 and 14, the heat exchanger 430 of the present embodiment includes an auxiliary heat exchanger 430c in addition to the front heat exchanger 30a and the rear heat exchanger 30b. The auxiliary heat exchanger 430c is arranged behind the right half of the rear heat exchanger 30b. The auxiliary heat exchanger 430c has the same length in the left-right direction as the rear heat exchanger 30b, and its width (substantially vertical length) is shorter than that of the rear heat exchanger 30b.

  In the blower 420, the configuration of the impeller 21A disposed in the range corresponding to the auxiliary heat exchanger 430c is the same as the impeller 21A of the first embodiment, and the configuration of the other impeller 21B is the first implementation. It is the same as the impeller 21B of the form. That is, the number of blade notches of the impeller 21A disposed in the range corresponding to the auxiliary heat exchanger 430c is smaller than the number of blade notches of the other impeller 21B.

  In the air flow path, the range in which the auxiliary heat exchanger 430c is disposed has a large ventilation resistance, but in this embodiment, the blades of the impeller 21A disposed in the range corresponding to the auxiliary heat exchanger 430c. Since the number of notches is small, it is possible to suppress a decrease in the air volume.

< Fifth Embodiment>
Next, an indoor unit according to a fifth embodiment of the invention will be described. However, about the thing which has the structure similar to 1st Embodiment, the description is abbreviate | omitted suitably using the same code | symbol.
The indoor unit of the present embodiment is different from the first embodiment in the configuration of the blower 520 and the casing 502, and the other configurations are the same as those in the first embodiment.

  As in the first embodiment, since the motor 44 and the pipe 42 are disposed on the right side of the indoor unit 501, the blower 520 and the heat exchanger 530 are disposed on the left side (see FIG. 4). In the casing 2 of the first embodiment, the main suction port 2a is formed on the left side, whereas as shown in FIG. 15, in the casing 502 of the present embodiment, the main suction port 502a has a symmetry. It is formed at the center in the left-right direction. The position of the left end of the main suction port 502a is closer to the center than the left end of the main suction port 2a, and the position of the right end of the main suction port 502a is the same as the position of the right end of the main suction port 2a.

  The blower 520 has the same configuration as the impeller 21A of the first embodiment in the configuration of the impeller 21A disposed in a range corresponding to the wall portion 507b provided on the left side of the main suction port 502a. The configuration of the impeller 21B is the same as the impeller 21B of the first embodiment. That is, the number of blade notches of the impeller 21A disposed in the range corresponding to the wall portion 507b is smaller than the number of blade notches of the other impeller 21B.

  In the flow path of the air flow, the range where the wall portion 507b of the main suction port 502a is present has a large ventilation resistance, but in this embodiment, the blade cutting of the impeller 21A disposed in the range corresponding to the wall portion 507b is cut. Since the number of notches is small, it is possible to suppress a decrease in the air volume.

< Sixth Embodiment>
Next, an indoor unit according to a sixth embodiment of the present invention will be described. However, about the thing which has the structure similar to 1st Embodiment, the description is abbreviate | omitted suitably using the same code | symbol.
The indoor unit of this embodiment differs from the first embodiment in the configuration of the blower 620 and the lower filter, and the other configurations are the same as those in the first embodiment.

  As shown in FIG. 16, in the present embodiment, the shapes of the left lower filter 612L and the right lower filter 612R are different from each other. The left lower filter 612L is bent at a substantially central portion in the vertical direction, and a portion below the bent portion is linearly formed. On the other hand, as for the lower filter 612R on the right side, the lower half of the lower filter 612R is formed in an arc shape like the lower filter 12 of the first embodiment. Therefore, the left lower filter 612L is closer to the blower 620 than the right lower filter 612R. Further, the left lower filter 612L has a larger ventilation resistance than the right lower filter 612R.

  The blower 620 has the same configuration of the impeller arranged in the range corresponding to the left lower filter 612L as the impeller 21A of the first embodiment, and the configuration of the other impellers is the same as that of the first embodiment. It is the same as the impeller 21B. That is, the number of notches of the blades of the impeller arranged in the range corresponding to the left lower filter 612L is smaller than the number of notches of the blades of the other impellers.

  In the air flow path, the air flow resistance is increased in the area where the lower filter 612L on the left side is disposed, but in this embodiment, the blade notch of the impeller disposed in the area corresponding to the lower filter 612L Since the number is small, it is possible to suppress a decrease in the air volume.

< Seventh embodiment>
Next, an indoor unit 701 according to a seventh embodiment of the present invention will be described.
As shown in FIG. 17, the indoor unit 701 of the present embodiment has a horizontally long rectangular parallelepiped shape and is attached to a wall surface in the room. In the following description, the direction protruding from the wall to which the indoor unit 701 is attached is referred to as “front”, and the opposite direction is referred to as “rear”. In addition, the horizontal direction and the vertical direction shown in FIG. 17 are simply referred to as “horizontal direction” and “vertical direction”.

  As shown in FIG. 18, the indoor unit 701 includes a casing 702 and internal devices such as a blower 703, a heat exchanger 705, a filter unit 710, and a cleaning unit 740 accommodated in the casing 702. In this indoor unit 701, the air sucked from the top surface inlet 702a (see FIG. 17) and the front inlet 702b formed on the upper surface of the casing 702 is heated or heated in the heat exchanger 705 by driving the blower 703. After cooling, it blows out from the blower outlet 702c formed in the lower surface of the casing 702.

  The filter unit 710 is disposed between the top surface suction port 702a and the front surface suction port 702b and the heat exchanger 705. The filter unit 710 includes two filters 720 arranged side by side in the left-right direction, a frame unit 730 that movably houses the filter 720, and a drive mechanism that moves the filter 720 in a predetermined movement direction inside the frame unit 730. 711. As shown in FIG. 19, a cover member 714 is disposed between the two filters 720.

  As shown in FIG. 20, the filter 720 includes a frame body 721 and a filter body 722 stretched inside the frame body 721. As shown in FIG. 21, rack portions 721 a that mesh with pinions 713 of a drive mechanism 711 described later are formed at both ends in the width direction of the frame body 721.

  As shown in FIG. 18, the frame unit 730 is formed with a movement path (normal guide path 730a, turn-back guide path 730b, and retraction guide path 730c) of the filter 720 accommodated therein. Here, the normal guide path 730a is provided on the top surface suction port 702a and the front surface suction port 702b side, and the retraction guide path 730c is provided on the heat exchanger 705 side. The folded guide path 730b connects the normal guide path 730a and the retreat guide path 730c described above at the lower part of the frame unit 730. During the air conditioning operation, the filter 720 is disposed in the normal guide path 730a, and when the filter 720 is automatically cleaned by a cleaning unit 740 described later, the filter 720 moves between the normal guide path 730a and the retraction guide path 730c.

  The frame unit 730 includes a guide member 731 that forms a normal guide path 730a, an under cover 732 that forms a folded guide path 730b, and a retraction guide path 730c that forms an id member 733, a guide member 731, and a guide member 733. And a partition member 734 disposed therebetween. A pinion 713 of a drive mechanism 711 described later is disposed between the under cover 732 and the partition member 734. The under cover 732 is opened so that a rotating brush 741 of a cleaning unit 740, which will be described later, contacts the filter 720 that passes through the folded guide path 730b. Further, two guide members 731 at the center of the four guide members 731 are constituted by both end portions of the cover member 714 in the left-right direction.

The drive mechanism 711 moves the filter 720 between the normal guide path 730a and the retraction guide path 730c so that the entire area of the filter 720 contacts a rotating brush 741 of the cleaning unit 740 described later when the filter 720 is automatically cleaned. Move.
The drive mechanism 711 includes a motor 712 (see FIG. 19) and a pinion 713 (see FIGS. 18 and 20) that is rotationally driven by the motor 712. As shown in FIG. 20, the pinions 713 are arranged at the left and right ends of the filter 720. The motor 712 is provided for each filter 720, and the right motor 712 is disposed so as to protrude from the right end of the cover member 714 (see FIG. 19).

  The cleaning unit 740 is provided to remove dust adhering to the filter 720. As shown in FIG. 18, the cleaning unit 740 has a rotating brush 741 extending in the left-right direction, and a comb member for scraping dust attached to the rotating brush 741 742, a compression rod 743 provided near the front of the comb member 742, a dust box 744 for storing dust compressed between the compression rod 743 and the comb member 742, a rotating brush 741, and a compression rod 743. And a motor 745 for rotating the motor.

  The rotating brush 741 is rotatably supported at both ends, and as shown in FIG. 20, brush bristles 741a are provided at portions excluding both ends and the center. A driving gear 741 b that is driven to rotate by a motor 745 is attached to the center of the rotating brush 741. Note that the rotation direction of the rotating brush 741 is opposite to the rotation direction of the pinion 713 that moves the filter 720.

  The compression rod 743 is disposed below the rotating brush 741, and both ends thereof are rotatably supported. A driven gear 743 a that meshes with the drive gear 741 b is attached to the central portion of the compression rod 743.

  When the air conditioning operation ends, the motor 712 of the drive mechanism 711 of the filter unit 710 is driven to rotate the pinion 713, and the motor 745 of the cleaning unit 740 is driven to rotate the rotating brush 741 and the compression rod 743. As a result, the filter 720 moves from the normal guide path 730a to the retraction guide path 730c via the return guide path 730b. When the filter 720 passes through the folding guide path, dust attached to the filter body 722 is removed by the rotating brush 741.

  The blower 703 is configured by a cross flow fan, and sucks air from the upper front and blows it out to the lower rear. As illustrated in FIG. 22, the blower 703 includes a plurality of impellers 704 arranged on the same rotation axis. Among the plurality of impellers 704, the cover member 714, the motor (drive mechanism) 712, and the impeller 704A arranged in a range corresponding to the motor 745 have the same configuration as the impeller 21A of the first embodiment. The impeller 704B has the same configuration as the impeller 21B of the first embodiment. That is, the number of blade notches of the impeller 704A disposed in the range corresponding to the cover member 714 and the motors 712 and 745 is smaller than the number of blade notches of the other impeller 704B.

  In the air flow path, the range corresponding to the cover member 714 and the motors 712 and 745 has a large ventilation resistance, but in this embodiment, the number of blade notches of the impeller 704A arranged in this range is Since there are few, it can suppress that an air volume falls.

< Eighth Embodiment>
Next, an indoor unit 801 according to an eighth embodiment of the present invention will be described.
As shown in FIG. 23, the indoor unit 801 of the present embodiment is a horizontally long rectangular parallelepiped like the indoor unit of the seventh embodiment, and is attached to an indoor wall surface. In FIG. 23, hatching is omitted.

  As shown in FIG. 23, the indoor unit 801 includes a casing 802 and internal devices such as a blower 803, a heat exchanger 805, and an additional function unit (additional function unit) 806 housed in the casing 802. In this indoor unit 801, the air sucked from the suction port 802 a formed on the upper surface of the casing 802 is heated or cooled in the heat exchanger 805 by driving the blower 803, and then formed on the lower surface of the casing 802. It blows out from the blower outlet 802b.

  The additional function unit 806 is disposed between a heat exchanger 805 and a filter (not shown) disposed to face the suction port 802a. The additional function unit 806 is an air cleaning unit having an air cleaning function, and can clean the air passing through the additional function unit 806 by generating a streamer discharge. The additional function unit 806 contains a discharge electrode for generating streamer discharge, a counter electrode, a filter, and the like. As shown in FIG. 24, the additional function unit 806 is arranged in a substantially half range on the right side of the air flow channel.

  The blower 803 is configured by a cross flow fan, and sucks air from the upper front and blows it out to the lower rear. As shown in FIG. 25, the blower 803 has a plurality of impellers 804 arranged on the same rotation axis. Of the plurality of impellers 804, the impeller 804A arranged in a range corresponding to the additional function unit 806 has the same configuration as the impeller 21A of the first embodiment, and the other impellers 804B are the same as those of the first embodiment. This is the same configuration as the impeller 21B. That is, the number of blade notches of the impeller 804A arranged in the range corresponding to the additional function unit 806 is smaller than the number of blade notches of the other impeller 804B.

  In the air flow path, the range corresponding to the additional function unit 806 has a large ventilation resistance. However, in this embodiment, since the number of blade notches of the impeller 804A arranged in this range is small, the air volume Can be suppressed.

  In the present embodiment, the additional function unit 806 is an air cleaning unit having an air cleaning function by streamer discharge, but may have an air cleaning function by other principles. The air cleaning function based on other principles includes, for example, a dust collecting function for collecting dust by charging passing dust. Further, it may be an additional function unit for adding other functions instead of the air cleaning function.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  In the above-described embodiment, the shapes of the notches 26 and 28 of the blade 22 are substantially triangular. However, the shape is not limited to this shape, and may be a trapezoidal shape, an arc shape, a square shape, or the like.

  In the above embodiment, the impeller 21A having a small number of cutouts has one cutout 28 formed on each blade 22A, but the cutout may not be formed at all. A plurality of notches may be formed in each blade 22A.

  In the said embodiment, although several blade | wings which comprise one impeller are all the same shapes, you may differ. For example, blades having one or a plurality of cutouts and blades not having a cutout may be alternately arranged. However, the total number of notches of an impeller with a small number of notches is less than the total number of notches of an impeller with a large number of notches.

  In the said embodiment, although several impeller 21B (or several impeller 21A) is all the same shapes, you may differ. For example, the number of notches in each blade may be different for each impeller.

  In the above-described embodiment, the notches 26 and 28 are formed at the outer peripheral wing tip of the blade 22, but the notch may be formed at the inner peripheral wing tip of the blade 22. A plurality of notches may be formed on both the outer peripheral wing tip and the inner peripheral wing tip.

  In the said embodiment, although the case where the crossflow fan was used was mentioned as an example and demonstrated as the air blower 20 of this invention, the air blower 20 is not limited to this. The blower 20 only needs to have a plurality of impellers arranged on the same rotation axis, and may be, for example, a sirocco fan or a turbo fan.

  The flow path resistance portion of the present invention is not limited to that described in the above embodiment. For example, in the eighth embodiment, the cover member 714 and the motors 712 and 745 constitute the flow path resistance portion of the present invention, but only the cover member 714 constitutes the flow path resistance portion of the present invention. Good. That is, the impeller 704 </ b> A having a small number of notches may be disposed only in a range corresponding to the cover member 714.

  By using the present invention, it is possible to suppress a reduction in air volume in the indoor unit.

1, 701, 801 Indoor unit 2, 502, 702, 802 Casing 10 Electrical component box 11, 12, 612L, 612R, 720 Filter 14 Filter body 15 Auxiliary filter 20, 120, 220, 320, 420, 520, 620, 703 , 803 Blower 21 (21A, 21B), 704 (704A, 704B), 804 (804A, 804B) Impeller 22 (22A, 22B) Blade 26, 28 Notch 30, 430, 705, 805 Heat exchanger,
30a Front heat exchanger (main heat exchanger)
30b Rear heat exchanger (main heat exchanger)
31 Fin 32 Hairpin tube 32a Straight line portion 32b Curved portion 430c Auxiliary heat exchanger 502a Main suction port (suction port)
507b Wall part 710 Filter unit 711 Drive mechanism 712 Motor 714 Cover member 740 Cleaning unit 745 Motor 806 Additional function unit (additional function part)

Claims (12)

A blower,
A heat exchanger disposed in a flow path of an air flow generated by the blower,
The blower has two or more blades and has a plurality of impellers provided on the same rotation axis,
The indoor unit, wherein the plurality of impellers include a plurality of types of impellers having different numbers of blade notches. The flow path of the air flow has a flow path resistance portion arranged in a range corresponding to a part of the longitudinal direction of the blower,
2. The indoor unit according to claim 1, wherein the number of notches of a blade of an impeller arranged in a range corresponding to the flow path resistance unit is smaller than the number of notches of a blade of another impeller. The heat exchanger has a hairpin tube penetrating a plurality of fins,
The indoor unit according to claim 2, wherein the flow path resistance portion is a portion adjacent to a curved portion of the hairpin tube in the plurality of fins.   The indoor unit according to claim 3, wherein the impeller having a small number of blade cutouts has a portion that does not face the fin. A plurality of filters arranged side by side in the longitudinal direction of the blower in the flow path of the air flow;
The indoor unit according to claim 2, wherein the flow path resistance unit is a filter that is closest to the blower among the plurality of filters. The airflow passage is provided with an electrical component box arranged in a range corresponding to a part of the blower in the longitudinal direction,
The indoor unit according to claim 2, wherein the flow path resistance unit is the electrical component box. The heat exchanger is
A main heat exchanger;
An auxiliary heat exchanger that is stacked on the main heat exchanger and disposed in a range corresponding to a part of the blower in the longitudinal direction;
The indoor unit according to claim 2, wherein the flow path resistance unit is the auxiliary heat exchanger. Comprising a filter provided in the flow path of the air flow;
The filter is laminated with an auxiliary filter arranged in a range corresponding to a part in the longitudinal direction of the blower,
The indoor unit according to claim 2, wherein the flow path resistance unit is the auxiliary filter. The air flow channel is provided with an additional function unit arranged in a range corresponding to a part of the longitudinal direction of the blower,
The indoor unit according to claim 2, wherein the flow path resistance unit is the additional function unit. A casing having a suction port for sucking air supplied to the blower;
The indoor unit according to claim 2, wherein the flow path resistance portion is a wall portion provided outside the suction port in the longitudinal direction of the blower. A filter provided in the flow path of the air flow;
A drive mechanism that is arranged in a range corresponding to a part of the blower in the longitudinal direction and moves the filter;
The indoor unit according to claim 2, wherein the flow path resistance unit is the drive mechanism. The plurality of impellers include a central impeller disposed in a longitudinal central portion of the blower;
The indoor unit according to claim 1, wherein the number of notches of the blades of the central impeller is smaller than the number of notches of the blades of the impeller disposed outside thereof.

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