JP3903971B2 - Air conditioner indoor unit - Google Patents

Description

  The present invention relates to an indoor unit of an air conditioner.

  Generally, an indoor unit of an air conditioner includes a blower fan such as a cross flow fan and a fan motor. The blower fan is arranged so that the rotation axis is parallel to the longitudinal direction of the indoor unit. The fan motor is disposed on the side of the blower fan and rotationally drives the blower fan. The blower fan and the fan motor are attached to the fan scroll structure and are accommodated in an accommodating portion provided in the fan scroll structure. Conventionally, the housing portion of the fan scroll structure covers the front, lower, and rear of the blower fan and fan motor, and the portion located behind the blower fan and fan motor is positioned above the upper portion of the blower fan and fan motor. In many cases, it has a shape reaching up to (see Patent Document 1).

In such an air conditioner indoor unit, the fan scroll structure is provided with a support structure for supporting the fan motor around the fan motor housed in the housing portion. That is, in the fan scroll structure of a conventional indoor unit of an air conditioner, the housing portion has a shape that reaches a position above the upper part of the blower fan or fan motor. Therefore, the front part, the rear part, and the lower part of the fan motor can be easily supported by providing the support part for supporting the fan motor in a part of the housing part facing the fan motor.
Japanese Patent Laid-Open No. 2001-153392 FIG. 2

  However, in the shape of the fan scroll structure as described above, the fan scroll structure is enlarged, and the conveyance efficiency in a state where the fan motor and the blower fan are placed on the fan scroll structure is reduced. For example, when manufacturing and assembling the fan scroll structure, blower fan, and fan motor are performed at a location other than the entire assembly of the indoor unit of the air conditioner, for cost reduction and manufacturing efficiency improvement, etc. It is necessary to transport the fan scroll structure with the fan motor and the blower fan mounted on the fan scroll structure. For this reason, it is desirable to reduce the size of the fan scroll structure from the viewpoint of improving the conveyance efficiency.

  On the other hand, when the fan scroll structure is downsized, it is difficult to provide a support portion that supports the fan motor. That is, when the upper position of the fan scroll structure is lowered in order to reduce the size of the fan scroll structure, the shape reaches the upper part of the fan motor like the fan scroll structure of a conventional air conditioner indoor unit. Unlike the case, it is particularly difficult to provide a structure that supports the front and rear of the fan motor.

  An object of the present invention is to provide an indoor unit of an air conditioner capable of downsizing a fan scroll structure and appropriately supporting a fan motor.

  An indoor unit of an air conditioner according to a first aspect includes a blower fan, a fan motor, a fan scroll structure, and a drain pan structure. A fan motor is arrange | positioned at the side of a ventilation fan, and rotates a ventilation fan. The fan scroll structure has a housing portion and a lower support portion. The accommodating portion accommodates the blower fan and the fan motor, and is located below the rotation center of the fan motor. The lower support part is formed integrally with the housing part and supports the lower part of the fan motor. The drain pan structure has a drain pan and front and rear support portions, and is formed separately from the fan scroll structure. A drain pan is arrange | positioned adjacent to the front and back and the side of a accommodating part. The front and rear support portions are formed integrally with the drain pan and support the front and rear portions of the fan motor.

  In the indoor unit of this air conditioner, the housing part of the fan scroll structure is located below the rotation center of the fan motor. For this reason, in this indoor unit of an air conditioner, the fan scroll structure is downsized. Further, a drain pan structure in which a lower support part for supporting the lower part of the fan motor is provided in the fan scroll structure, and front and rear support parts for supporting the front part and the rear part of the fan motor are formed separately from the fan scroll structure. Is provided. For this reason, even if the fan scroll structure is downsized, the fan motor can be appropriately supported by the front and rear support portions of the drain pan structure. Thus, the indoor unit of this air conditioner can downsize the fan scroll structure and appropriately support the fan motor.

  Furthermore, in this indoor unit of an air conditioner, the lower support portion that supports the lower portion of the fan motor is formed integrally with the housing portion of the fan scroll structure. Therefore, the precision of arrangement | positioning with an accommodating part and the shaft center of a fan motor and a ventilation fan can be improved. For this reason, in this indoor unit of an air conditioner, variation in wind performance can be reduced.

  An indoor unit of an air conditioner according to a second aspect includes a blower fan, a fan motor, a fan scroll structure, and a drain pan structure. The fan motor is disposed on the side of the blower fan and rotationally drives the blower fan. The fan scroll structure has an accommodating portion. The accommodating portion accommodates the blower fan and the fan motor, and is located below the rotation center of the fan motor. The drain pan structure has a drain pan, a lower support portion, and front and rear support portions, and is formed separately from the fan scroll structure. A drain pan is arrange | positioned adjacent to the front and back and the side of a accommodating part. The lower support part is formed integrally with the drain pan and supports the lower part of the fan motor. The front and rear support portions are formed integrally with the drain pan and support the front and rear portions of the fan motor.

  In the indoor unit of this air conditioner, the housing part of the fan scroll structure is located below the rotation center of the fan motor. For this reason, in this indoor unit of an air conditioner, the fan scroll structure is downsized. Further, a lower support part that supports the lower part of the fan motor and a front and rear support part that supports the front part and the rear part of the fan motor are provided in a drain pan structure formed separately from the fan scroll structure. For this reason, even if a fan scroll structure is reduced in size, a fan motor can be appropriately supported by the lower support part and front-back support part which were provided in the drain pan structure. Thus, the indoor unit of this air conditioner can downsize the fan scroll structure and appropriately support the fan motor.

  An indoor unit for an air conditioner according to a third aspect is the indoor unit for an air conditioner according to the first or second aspect, wherein the front and rear support portion also serves as a part of a drain pan.

  In this indoor unit of an air conditioner, the front and rear support portions are formed integrally with the drain pan, so that it is easy to form the drain pan structure so that the front and rear support portions also serve as part of the drain pan. And the drain pan structure can be reduced in size by making the drain pan structure into a shape in which the front and rear support portions also serve as part of the drain pan.

  The indoor unit of the air conditioner according to claim 4 is the indoor unit of the air conditioner according to claim 3, wherein the front and rear support parts surround the front part and the rear part protruding from the main body of the fan motor. It has an upright wall-like shape. Further, the inner surface of the front / rear support portion fixes the fan motor, and the outer surface of the front / rear support portion constitutes a part of the side wall of the drain pan.

  In this indoor unit of an air conditioner, the front and rear support portions also serve as a part of the drain pan so that the inner surface of the front and rear support portion fixes the fan motor and the outer surface forms a part of the side wall of the drain pan. For this reason, compared with the case where the side wall of a drain pan is further provided in the outer side of the outer surface of a front-back support part, a drain pan structure is reduced in size.

  In this air conditioner indoor unit, since the front and rear support portions are formed integrally with the drain pan, there is no seam between the front and rear support portions and the drain pan. For this reason, even if the front and rear support portions have a shape also serving as a part of the drain pan as described above, the drain water received by the drain pan is prevented from leaking from the joint.

  An air conditioner indoor unit according to claim 5 is the air conditioner indoor unit according to any one of claims 1 to 4, wherein the fan scroll structure is located below the rotation center of the fan motor. .

  In this indoor unit of an air conditioner, the fan scroll structure is located below the rotation center of the fan motor. For this reason, the fan scroll structure is further downsized.

  The indoor unit of the air conditioner according to claim 6 is the indoor unit of the air conditioner according to any one of claims 1 to 5, wherein the fan motor is a motor having an outer rotor, and the outer rotor is Fixed directly to the blower fan.

  In this air conditioner indoor unit, the fan motor is a motor having an outer rotor, and the outer rotor is directly fixed to the blower fan. With such a configuration, the fan motor and the blower fan can be reduced in size, and the fan scroll structure that accommodates the fan motor and the blower fan can be reduced in size.

  In addition, when the outer rotor is directly fixed to the blower fan, the space between the fan motor and the blower fan is lost. Therefore, like an indoor unit of a conventional air conditioner, between the fan motor and the blower fan. It cannot be set as the structure which provides a drain pan. Therefore, it is necessary to set it as the structure by which the drain pan was provided in the side of the accommodating part which accommodates a fan motor and a ventilation fan. In such a configuration, since the drain pan is positioned on the side of the fan motor opposite to the blower fan, the drain pan is positioned in the vicinity of the fixed portion of the fan motor. Therefore, fixing the fan motor by providing the front and rear support portions integrally with the drain pan is more effective.

  An indoor unit for an air conditioner according to a seventh aspect is the indoor unit for an air conditioner according to any one of the first to sixth aspects, wherein the fan scroll structure has an internal space. The internal space is closed from the outside and functions as an air heat insulating layer by attaching the drain pan structure to the fan scroll structure.

  In this indoor unit of an air conditioner, an air heat insulating layer can be easily formed by the drain pan structure and the fan scroll structure. Thereby, the internal dew condensation in the indoor unit of an air conditioner can be reduced.

  Further, when the drain pan structure and the fan scroll structure are separate from each other in this way, it is more effective to fix the fan motor by providing the front and rear support portions integrally with the drain pan.

  In the indoor unit for an air conditioner according to claim 1, even if the fan scroll structure is downsized, the fan motor can be appropriately supported by the front and rear support portions of the drain pan structure. Thus, the indoor unit of this air conditioner can downsize the fan scroll structure and appropriately support the fan motor.

  In the indoor unit of the air conditioner according to claim 2, even if the fan scroll structure is downsized, the fan motor can be appropriately supported by the lower support portion and the front and rear support portions provided in the drain pan structure. . Thus, the indoor unit of this air conditioner can downsize the fan scroll structure and appropriately support the fan motor.

  In the indoor unit for an air conditioner according to claim 3, the drain pan structure can be reduced in size by forming the drain pan structure so that the front and rear support portions also serve as a part of the drain pan.

  In the indoor unit of the air conditioner according to the fourth aspect, the drain pan structure is downsized as compared with the case where the side wall of the drain pan is further provided outside the outer surface of the front and rear support portion.

  In the indoor unit for an air conditioner according to claim 5, the fan scroll structure is located below the rotation center of the fan motor. For this reason, the fan scroll structure is further downsized.

  In the indoor unit for an air conditioner according to claim 6, the fan motor is a motor having an outer rotor, and the outer rotor is directly fixed to the blower fan. With such a configuration, the fan motor and the blower fan can be reduced in size, and the fan scroll structure that accommodates the fan motor and the blower fan can be reduced in size.

  In the indoor unit for an air conditioner according to a seventh aspect, the air heat insulating layer can be easily formed by the drain pan structure and the fan scroll structure. Thereby, the internal dew condensation in the indoor unit of an air conditioner can be reduced.

Example 1
<Overall configuration of air conditioner>
FIG. 1 shows the appearance of an air conditioner 1 in which an embodiment of the present invention is adopted.

  The air conditioner 1 includes an indoor unit 2 attached to an indoor wall surface and the like, and an outdoor unit 3 installed outside the room.

  An indoor heat exchanger 50 is accommodated in the indoor unit 2, and an outdoor heat exchanger 30 is accommodated in the outdoor unit 3, and each heat exchanger 30, 50 is connected by the refrigerant pipe 4 to generate refrigerant. The circuit is configured.

<Outline of configuration of refrigerant circuit of air conditioner>
The structure of the refrigerant circuit of the air conditioner 1 is shown in FIG. This refrigerant circuit mainly includes an indoor heat exchanger 50, an accumulator 31, a compressor 32, a four-way switching valve 33, an outdoor heat exchanger 30, and an electric expansion valve 34.

  The indoor heat exchanger 50 provided in the indoor unit 2 exchanges heat with the air that comes into contact therewith. Further, the indoor unit 2 is provided with a cross flow fan 71 for sucking indoor air, passing the air through the indoor heat exchanger 50, and discharging the air after being exchanged into the room. The cross flow fan 71 is formed in a long and thin cylindrical shape, and is arranged so that the central axis is parallel to the horizontal direction when viewed from the front (see FIG. 5). The cross flow fan 71 is rotationally driven by an indoor fan motor 72 provided in the indoor unit 2. The detailed configuration of the indoor unit 2 will be described later.

  The outdoor unit 3 is connected to a compressor 32, a four-way switching valve 33 connected to the discharge side of the compressor 32, an accumulator 31 connected to the suction side of the compressor 32, and a four-way switching valve 33. An outdoor heat exchanger 30 and an electric expansion valve 34 connected to the outdoor heat exchanger 30 are provided. The electric expansion valve 34 is connected to the pipe 41 via the filter 35 and the liquid closing valve 36, and is connected to one end of the indoor heat exchanger 50 via the pipe 41. The four-way switching valve 33 is connected to the pipe 42 via the gas closing valve 37 and is connected to the other end of the indoor heat exchanger 50 via the pipe 42. The pipes 41 and 42 correspond to the refrigerant pipe 4 in FIG. Further, the outdoor unit 3 is provided with a propeller fan 38 for discharging the air after heat exchange in the outdoor heat exchanger 30 to the outside. The propeller fan 38 is rotated by an outdoor fan motor 39.

<Configuration of indoor unit>
FIG. 3A shows a front view of the indoor unit 2, and FIG. 3B shows a side view of the indoor unit 2. The indoor unit 2 has a shape that is long in the left-right direction when viewed from the front.

  The indoor unit 2 is mainly configured by an upper casing 6, a lower unit 7, and an indoor heat exchanger unit 5 (see FIG. 5) housed inside the indoor unit 2. The upper casing 6 covers the upper part of the indoor unit 2. The lower unit 7 constitutes the lower part of the indoor unit 2. The upper casing 6 and the lower unit 7 are formed separately, and the boundary between the upper casing 6 and a part of the lower unit 7 appears as a horizontal line in the appearance of the indoor unit 2.

  Hereinafter, each structure of the indoor unit 2 will be described.

[Upper casing]
The upper casing 6 constitutes an upper portion of the indoor unit 2 and is constituted by an upper front surface portion 60, a top surface portion 61, and upper side surface portions 62 and 63.

  As shown in FIG. 4, the upper front part 60 covers the front upper part of the indoor unit 2 and covers the front of the indoor heat exchanger 50. FIG. 4 is a schematic diagram of the IV-IV cross section in FIG. The upper front part 60 is formed substantially flat, and a step is provided in a part thereof. On the upper surface of this step, a front suction port 601 is provided that is formed of a slit-like opening that is long in the longitudinal direction of the indoor unit 2. The front suction port 601 is provided upward of the indoor unit 2.

  The top surface portion 61 covers the top surface of the indoor unit 2 and covers the top of the indoor heat exchanger 50. The top surface portion 61 is provided with a top surface suction port 611 composed of a plurality of slit-shaped openings. The top surface suction port 611 is provided from the front side to the rear side of the top surface portion 61 and has a larger suction area than the front surface suction port 601. For this reason, air is sufficiently sucked also from the rear side of the top surface of the indoor unit 2.

  The upper side surfaces 62 and 63 cover the upper part of the side surface of the indoor unit 2 and cover the side of the indoor heat exchanger 50. The upper side surface portions 62 and 63 include an upper right side surface portion 62 and an upper left side surface portion 63. The upper right side surface portion 62 is disposed on the right side of the indoor heat exchanger 50 in a front view, and the upper left side surface portion 63 is an indoor heat exchanger. It is arranged on the left side of the vessel 50.

  Further, the lower end of the upper casing 6 is formed horizontally, and when the upper casing 6 is covered with the lower unit 7, the boundary between the upper casing 6 and the lower unit 7 becomes a horizontal line and the front view of the indoor unit 2 and Appears in appearance in side view.

[Indoor heat exchanger unit]
As shown in FIG. 5, the indoor heat exchanger unit 5 includes an indoor heat exchanger 50, an auxiliary pipe 51, a heat exchanger support member 52, and the like. FIG. 5 is an external perspective view of the lower unit 7 and the indoor heat exchanger unit 5 with the upper casing 6 removed. Since the indoor heat exchanger 50 of the indoor heat exchanger unit 5 has an inverted V shape and is open at the bottom, the indoor heat exchanger unit 5 includes the cross flow fan 71 and the indoor fan motor 72. Is attached to the lower unit 7 from above and supported by the lower unit 7 via the heat exchanger support member 52.

<Indoor heat exchanger>
As shown in FIG. 4, the indoor heat exchanger 50 is attached so as to surround the front, upper, and rear of the crossflow fan 71, and is sucked from the suction ports 601 and 611 by the rotation of the crossflow fan 71. The air thus passed is passed to the cross flow fan 71 side, and heat exchange is performed with the refrigerant passing through the inside of the heat transfer tube. The indoor heat exchanger 50 is divided into four parts: a first indoor heat exchanger 50a, a second indoor heat exchanger 50b, a third indoor heat exchanger 50c, and a fourth indoor heat exchanger 50d. The indoor heat exchanger 50 has a generally inverted V-shaped cross-sectional shape in which both ends are bent downward in a side view by joining the indoor heat exchangers 50a, 50b, 50c, and 50d. Is formed.

  Each indoor heat exchanger 50a, 50b, 50c, 50d has a plate-like shape that is long in the horizontal direction. Each of the indoor heat exchangers 50a, 50b, 50c, and 50d includes a heat transfer tube that is bent back at both ends and a plurality of strip-shaped fins through which the heat transfer tube is inserted. The heat transfer tubes are folded back by U-shaped heat transfer tubes at both ends of each indoor heat exchanger 50a, 50b, 50c, 50d.

  The upper end of the first indoor heat exchanger 50 a is inclined toward the front of the indoor unit 2, and is arranged so as to cover the rear upper side from the upper center of the cross flow fan 71.

  The upper end of the second indoor heat exchanger 50b is inclined toward the rear of the indoor unit 2, and is disposed in front of the first indoor heat exchanger 50a. The upper end of the second indoor heat exchanger 50b is joined to the upper end of the first indoor heat exchanger 50a, and the first indoor heat exchanger 50a and the second indoor heat exchanger 50b are inverted V-shaped in a side view. Combined to form a mold. The second indoor heat exchanger 50 b is arranged so as to cover the front upper side from the center upper side of the cross flow fan 71.

  The third indoor heat exchanger 50c is disposed below the second indoor heat exchanger 50b so as to cover the front of the cross flow fan 71. The upper end of the third indoor heat exchanger 50c is joined to the lower end of the second indoor heat exchanger 50b at an angle, and an obtuse angle is formed by the third indoor heat exchanger 50c and the second indoor heat exchanger 50b. ing. The third indoor heat exchanger 50 c is parallel to the height direction, that is, the vertical direction, and is perpendicular to the lower unit 7 that covers the horizontal plane below the indoor heat exchanger 50. The lower end of the third indoor heat exchanger 50c is the lower end of the indoor heat exchanger 50, and the lower end of the third indoor heat exchanger 50c, that is, the lower end on the front side of the indoor heat exchanger 50, is the cross flow fan 71. It is located at almost the same height as the central axis.

  The fourth indoor heat exchanger 50d is disposed below the first indoor heat exchanger 50a so as to cover the back of the cross flow fan 71. The upper end of the fourth indoor heat exchanger 50d is joined to the lower end of the first indoor heat exchanger 50a at an angle, and an obtuse angle is formed by the fourth indoor heat exchanger 50d and the first indoor heat exchanger 50a. Has been. The fourth indoor heat exchanger 50 d is parallel to the height direction and is perpendicular to the lower unit 7 that covers the horizontal plane below the indoor heat exchanger 50. The lower end of the fourth indoor heat exchanger 50d is a lower end on the rear side of the indoor heat exchanger 50, and the lower end of the fourth indoor heat exchanger 50d, that is, the lower end on the rear side of the indoor heat exchanger 50 is The cross flow fan 71 is located at substantially the same height as the central axis.

  The third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d have the same length in the height direction, and the upper and lower ends of the third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d. Are located at the same height. Accordingly, the lower end on the front side and the lower end on the rear side of the indoor heat exchanger 50 are at the same height, and are positioned at substantially the same height as the central axis of the cross flow fan 71. Further, the front lower end and the rear lower end of the indoor heat exchanger 50 extend vertically downward from the front and rear lower ends of the inverted V-shaped portion to substantially the same height as the central axis of the cross flow fan 71.

  The 1st indoor heat exchanger 50a, the 2nd indoor heat exchanger 50b, the 3rd indoor heat exchanger 50c, and the 4th indoor heat exchanger 50d are fixed respectively provided in the both ends (the end of the horizontal direction in the front view). By being fixed to each other by the plates, they are joined together to form the indoor heat exchanger 50. The indoor heat exchanger 50 includes an inverted V-shaped portion formed by the first indoor heat exchanger 50a and the second indoor heat exchanger 50b, and the first indoor heat exchanger 50a and the second indoor heat exchanger 50b. And a straight-line portion extending downward in the vertical direction from the respective lower ends thereof. The indoor heat exchanger 50 has a cross-sectional shape that is symmetrical with respect to the front and rear with respect to a straight line that passes through the inverted V-shaped apex and is parallel to the vertical direction, and the first indoor heat exchanger 50a and the second indoor heat exchanger 50b. In addition, the third indoor heat exchanger 50c and the fourth indoor heat exchanger 50d are symmetrical in the front-rear direction. The indoor heat exchanger 50 is formed in a cross-sectional shape including an inverted V-shape that is symmetrical in the front-rear direction as described above in a side view, but has a shape that is long in the lateral direction in a front view.

<Auxiliary piping>
The auxiliary pipe 51 connects the indoor heat exchanger 50 and the refrigerant pipe 4 outside the indoor unit 2, and refrigerant flows between the indoor heat exchanger 50 and the outdoor heat exchanger 30. As shown in FIG. 5, the auxiliary pipe 51 is connected to a heat transfer pipe protruding from the side surface of the indoor heat exchanger 50. The auxiliary pipe 51 protrudes from the right side surface of the indoor heat exchanger 50 and is routed in the space on the right side of the indoor heat exchanger 50. The auxiliary piping 51 is bent toward the back side of the indoor unit 2 after protruding from the right side surface of the indoor heat exchanger 50. The auxiliary pipe 51 extends downward in the space on the right side of the indoor heat exchanger 50 along the back side of the indoor unit 2 and toward the left side of the indoor unit 2 in the space on the lower rear side of the indoor unit 2. Further bent and connected to the refrigerant pipe 4 (see FIG. 1) on the lower left side of the rear side of the indoor unit 2. The auxiliary pipe 51 can also be connected to the refrigerant pipe 4 on the lower right side of the rear side of the indoor unit 2. In this case, the auxiliary pipe 51 is routed in the right space of the indoor heat exchanger 50. After that, it is connected to the refrigerant pipe 4 on the lower right side of the rear side of the indoor unit 2.

  Here, “right” and “left” mean right and left in the front view of the indoor unit 2, and so on.

<Heat exchanger support member>
The heat exchanger support member 52 is provided near the side surface of the indoor heat exchanger 50, supports the indoor heat exchanger 50 from the inside, and covers the indoor fan motor 72. Further, the heat exchanger support member 52 fixes a part of the auxiliary pipe 51 routed on the right side. The heat exchanger support member 52 is provided near the right side surface of the indoor heat exchanger 50, and includes a side plate 54, a motor cover 55, and a pipe fixing member 56.

  The side plate 54 is a plate-like portion having a shape along the inverted V shape of the indoor heat exchanger 50, and supports the indoor heat exchanger 50 from the outside.

  The motor cover 55 covers the upper half of the indoor fan motor 72. The motor cover 55 has a curved surface that is curved in a circular arc shape, and protrudes from the side plate 54 to the side of the indoor heat exchanger 50. The motor cover 55 faces the upper half of the circumferential surface of the indoor fan motor 72 and covers the upper part of the indoor fan motor 72.

  The auxiliary pipe 51 extends outward from the right side surface of the indoor heat exchanger 50, and the motor cover 55 is located below the auxiliary pipe 51. The motor cover 55 is formed so that drain water dropped from the auxiliary pipe 51 flows to the drain pan structure 80a (see FIG. 5), and protects the indoor fan motor 72 from the drain water.

  The pipe fixing member 56 fixes the auxiliary pipe 51 in order to suppress deformation of the auxiliary pipe 51. The pipe fixing member 56 fixes the auxiliary pipe 51 by covering the entire circumference of a part of the auxiliary pipe 51 routed around the indoor heat exchanger 50. The pipe fixing member 56 includes a first pipe fixing member 57 and a second pipe fixing member 58. The first pipe fixing member 57 is integrated with the side plate 54 and restricts the movement of the auxiliary pipe 51 to the side by covering the side of the auxiliary pipe 51. The second pipe fixing member 58 fixes the auxiliary pipe 51 from the opposite side of the first pipe fixing member 57 across the auxiliary pipe 51. The second pipe fixing member 58 is formed separately from the first pipe fixing member 57 and is attached to the first pipe fixing member 57.

[Lower unit]
The lower unit 7 constitutes the lower part of the indoor unit 2, and includes a bottom casing 70, a fan scroll structure 78a, a drain pan structure 80a, a cross flow fan 71, an indoor fan motor 72, and an electrical component box 73 (see FIG. 10). Are modularized.

<Bottom casing>
The bottom casing 70 is provided in the lowermost part of the lower unit 7, and the fan scroll structure 78a is attached thereon. As shown in FIG. 6, the bottom casing 70 has a lower front surface portion 74, a bottom surface portion 75, and lower side surface portions 76 and 77.

(Lower front)
The lower front surface portion 74 is disposed at the lower front surface of the indoor unit 2 and is provided with a large notch. In a state in which a fan scroll structure 78a, which will be described later, is attached to the bottom casing 70, the air outlet 11 of the fan scroll structure 78a faces the room through the notched portion of the lower front surface portion 74.

(Bottom)
The bottom surface portion 75 covers the bottom surface of the indoor unit 2 and is formed flat. The bottom surface portion 75 is disposed horizontally, and the fan scroll structure 78a is disposed thereon. As shown in FIG. 7, the bottom surface portion 75 forms a first sealed space S1 with the fan scroll structure 78a. FIG. 7 is a side sectional view of the lower unit 7. The first sealed space S1 functions as a heat insulating layer when air is sealed. Further, a bottom rib 90 composed of a plurality of first ribs 91 and a plurality of second ribs 92 that divide the first sealed space S1 into a plurality of spaces is formed on the upper surface of the bottom surface portion 75, that is, the inner surface facing the first sealed space S1. Is provided.

  The first rib 91 extends upward from the inner surface of the bottom surface portion 75, and partitions the vicinity of the inner surface of the bottom surface portion 75 of the first sealed space S1 into a plurality of spaces in the front-rear direction. The first rib 91 is provided perpendicular to the bottom surface portion 75 in parallel with the left-right direction of the indoor unit 2. Moreover, the some 1st rib 91 is arrange | positioned along with the blowing direction (refer arrow A1 of FIG. 7) of the indoor unit 2, ie, along with the front-back direction. For this reason, the plurality of first ribs 91 are arranged so as to block the flow of air flowing in the front-rear direction along the bottom surface portion 75. The first ribs 91 each have a height of about 7.5 mm, and the interval between the plurality of first ribs 91 in the front-rear direction is about 15 mm.

  The second rib 92 extends upward from the inner surface of the bottom surface portion 75, and partitions the vicinity of the inner surface of the bottom surface portion 75 of the first sealed space S1 into a plurality of spaces in the left-right direction. The second rib 92 is disposed perpendicular to the bottom surface portion 75 in parallel to the front-rear direction of the indoor unit 2 and intersects the first rib 91. The plurality of second ribs 92 are arranged along the direction perpendicular to the blowing direction of the indoor unit 2, that is, in the left-right direction. For this reason, the plurality of second ribs 92 are arranged so as to block the flow of air flowing in the left-right direction along the bottom surface portion 75. The second ribs 92 each have a height of about 7.5 mm, and the spacing between the plurality of second ribs 92 in the left-right direction is about 124 mm.

  In FIG. 6, for easy understanding, reference numerals are given to only a part of the first rib 91 and the second rib 92, and others are omitted.

(Lower side)
The lower side surface portions 76 and 77 are portions that appear in the field of view as a lower side surface of the indoor unit 2 in a side view, and cover the lower side surface of the indoor unit 2. The lower side surface portions 76 and 77 include a lower right side surface portion 76 and a lower left side surface portion 77. The lower right side surface portion 76 is disposed on the right side of the indoor unit 2 in a front view, and the lower left side surface portion 77 is an indoor heat exchanger. 50 is arranged on the left side. Further, the upper ends of the lower side surface portions 76 and 77 are formed substantially horizontally in the same manner as the lower front surface portion 74. In a state where the upper casing 6 is covered with the lower unit 7, the lower end of the upper casing 6 and the upper ends of the lower front surface portion 74 and the lower side surface portions 76 and 77 of the lower unit 7 are aligned to form a horizontal boundary line. The

<Fan scroll structure>
The fan scroll structure 78a is attached to the bottom casing 70 from above the bottom casing 70 as shown in FIG. A cross flow fan 71, an indoor fan motor 72, an electrical component box 73 (see FIG. 10), a drain pan structure 80a, an indoor heat exchanger unit 5 and the like are attached to the fan scroll structure 78a from above. 78a supports the cross flow fan 71, the indoor fan motor 72, the electrical component box 73, the drain pan structure 80a, the indoor heat exchanger unit 5 and the like from below. Note that the upper surface of the fan scroll structure 78 a has substantially the same height as the rotation center of the cross flow fan 71 and the indoor fan motor 72. As shown in FIG. 7, the fan scroll structure 78a includes a fan housing portion 10a, a blowout port 11, a scroll 12, a drain pan fixing portion 13 (see FIG. 9), a support frame 14, and the like.

[Fan compartment]
The fan accommodating portion 10a is a portion in which the cross flow fan 71 and the indoor fan motor 72 are accommodated, near the center of the upper surface of the fan scroll structure 78a, from near the left end of the fan scroll structure 78a to near the right end. It is provided over. The fan accommodating portion 10a is formed of a member that is recessed in a semicylindrical shape downward from the upper surface of the fan scroll structure 78a. The fan accommodating portion 10 a is located below the rotation center of the cross flow fan 71 and the indoor fan motor 72 and accommodates the lower half of the cross flow fan 71 and the indoor fan motor 72. Further, the space in which the cross flow fan 71 is accommodated communicates with the air path R1 connected to the outlet 11 inside the fan scroll structure 78a.

  FIG. 8 shows a part of the fan scroll structure 78a in a state where the cross flow fan 71 and the indoor fan motor 72 are not attached. FIG. 8 shows a state where the drain pan structure 80a is attached to the fan scroll structure 78a. When viewed from the front, the left portion of the fan housing portion 10a is a portion for housing the cross flow fan 71, and the vicinity of the right end of the fan housing portion 10a is the motor housing portion 20a for housing the indoor fan motor 72. ing. The indoor fan motor 72 is disposed close to the right side of the cross flow fan 71 as will be described later. The motor housing portion 20a is formed by a member that is recessed downward in a semicylindrical shape, and a lower support portion 21a is provided integrally with the motor housing portion 20a at the bottom thereof. The lower support portion 21a has a concave shape that is recessed downward, and supports a lower protruding portion 27 of an indoor fan motor 72 described later. The indoor fan motor 72 is supported by the lower support portion 21a by fitting the lower protruding portion 27 of the indoor fan motor 72 to the lower support portion 21a.

[Outlet]
As shown in FIG. 7, the air outlet 11 is provided in the lower part of the front surface of the fan scroll structure 78a, and the air generated by the cross flow fan 71 and blown out into the room through the air path R1 passes therethrough. The air outlet 11 is formed of an opening along the longitudinal direction of the indoor unit 2, and communicates with the space inside the fan scroll structure 78 a in which the cross flow fan 71 is accommodated. Further, a horizontal flap 742 for guiding the air blown into the room is provided at the outlet 11 (see FIG. 4). The horizontal flap 742 is provided so as to be rotatable about an axis parallel to the longitudinal direction of the indoor unit 2, and is rotated by a flap motor (not shown) to open and close the outlet 11. be able to.

〔scroll〕
The scroll 12 connects the fan accommodating portion 10a and the outlet 11 and forms an air path R1. The scroll 12 is curved around an axis parallel to the rotation axis of the cross flow fan 71 inside the fan scroll structure 78a. The scroll 12 faces the air path R1 on one side, and faces the first sealed space S1 on the opposite side. That is, the scroll 12 partitions the air path R1 and the first sealed space S1. A scroll rib 95 including a plurality of third ribs 93 and a plurality of fourth ribs 94 is provided on the inner surface of the scroll 12 facing the first sealed space S1.

  The plurality of third ribs 93 are disposed on the inner surface of the scroll 12 as shown in FIG. 9. FIG. 9 is an external perspective view of the fan scroll structure 78a and the drain pan structure 80a. The third rib 93 extends vertically downward from the inner surface of the scroll 12, and partitions the vicinity of the inner surface of the scroll 12 in the first sealed space S <b> 1 into a plurality of spaces along the scroll 12 in the front-rear direction. The third rib 93 is provided on the inner surface of the scroll 12 in parallel with the left-right direction of the indoor unit 2. Moreover, the several 3rd rib 93 is arrange | positioned along with the blowing direction of the indoor unit 2, ie, along with the front-back direction. For this reason, the plurality of third ribs 93 are arranged so as to block the flow of air flowing in the front-rear direction or the vertical direction along the scroll 12. The third ribs 93 each have a height of about 5 mm, and the interval between the plurality of third ribs 93 in the front-rear direction is about 15 mm.

  The fourth rib 94 extends downward in the vertical direction from the inner surface of the scroll 12, and partitions the vicinity of the inner surface of the scroll 12 in the first sealed space S1 into a plurality of spaces in the left-right direction. The fourth rib 94 is disposed on the inner surface of the scroll 12 in parallel with the front-rear direction of the indoor unit 2, and is provided so as to intersect with the third rib 93. The plurality of fourth ribs 94 are arranged along the direction perpendicular to the blowing direction of the indoor unit 2, that is, aligned in the left-right direction. For this reason, the plurality of fourth ribs 94 are arranged so as to block the flow of air flowing in the left-right direction along the scroll 12. The fourth ribs 94 each have a height of about 5 mm, and the spacing between the plurality of fourth ribs 94 in the left-right direction is about 34 mm.

  In FIG. 9, for ease of understanding, only a part of the third rib 93 and the fourth rib 94 are denoted by reference numerals, and others are omitted.

[Drain pan fixing part]
As shown in FIGS. 7 and 9, the drain pan fixing portion 13 is provided on the upper surface of the fan scroll structure 78a, and is disposed along the front and rear sides and the right side of the fan accommodating portion 10a. The drain pan fixing portion 13 is a portion that supports the drain pan structure 80 a by fixing the drain pan structure 80 a, and includes a front fixing portion 15, a rear fixing portion 16, and a right fixing portion 17.

  As shown in FIG. 7, the front fixing portion 15 is provided in front of the fan accommodating portion 10a along the fan accommodating portion 10a, and a front drain pan 81 described later is fixed thereto. The front fixing portion 15 has a groove shape that extends in the left-right direction and opens upward, and a front convex portion 151 is provided at the front edge of the groove. The front convex portion 151 has a shape protruding upward, and is provided over substantially the entire length of the front fixing portion 15. The front convex portion 151 constitutes a part of the front seal structure 150 for fixing the front fixing portion 15 and the front drain pan 81. Further, by fixing the front drain pan 81 to the front fixing portion 15, a second sealed space S2 is formed in which the groove of the front fixing portion 15 is closed to block air from entering and exiting from the outside. The second sealed space S2 is sealed with air, and external air is blocked from entering and exiting. Therefore, the second sealed space S2 is an air heat insulating layer having a heat insulating effect.

  The rear fixing portion 16 is provided along the fan accommodating portion 10a behind the fan accommodating portion 10a, and a rear drain pan 82 to be described later is fixed. The rear fixing portion 16 has a groove shape extending in the left-right direction and opened upward, and a rear convex portion 161 is provided at the edge of the rear groove of the rear fixing portion 16. The rear convex portion 161 has a shape protruding upward, and is provided over substantially the entire longitudinal direction of the rear fixed portion 16. The rear convex portion 161 constitutes a part of the rear seal structure 160 for fixing the rear fixing portion 16 and the rear drain pan 82. Further, the rear drain pan 82 is fixed to the rear fixing portion 16, thereby forming a third sealed space S <b> 3 in which the groove of the rear fixing portion 16 is closed and the outside air is blocked. In the third sealed space S3, air is sealed, and entry / exit of air from the outside is blocked. For this reason, the third sealed space S3 is an air heat insulating layer having a heat insulating effect.

  As shown in FIG. 9, the right fixing portion 17 is provided along the fan housing portion 10 a on the right side of the fan housing portion 10 a, and a communication path 83 to be described later is fixed. The right fixing portion 17 has a groove shape that extends in the front-rear direction and opens upward, and a right convex portion is also provided on the edge of the groove of the right fixing portion 17 (not shown). The right convex portion has an upwardly convex shape like the front convex portion 151 and the rear convex portion 161, and is provided over substantially the entire front and rear direction of the right fixing portion 17.

  The grooves of the front fixing portion 15, the rear fixing portion 16, and the right fixing portion 17 are continuously connected to each other, and the drain pan fixing portion 13 is arranged in a cono-shape along the periphery of the fan accommodating portion 10a. An open groove is provided. Further, convex portions 151 and 161 that are convex upward are provided over substantially the entire outside of the groove, and constitute a part of the seal structures 150 and 160.

[Support frame]
As shown in FIGS. 7 and 9, the support frame 14 is a portion that contacts the bottom casing 70 when the fan scroll structure 78 a is attached to the bottom casing 70. The support frame 14 is provided below the drain pan fixing portion 13 and the fan accommodating portion 10 a and covers the rear and both sides of the scroll 12. The support frame 14, the scroll 12, and the bottom surface portion 75 are fixed to each other and form a first sealed space S1. The support frame 14 closes the rear and both sides of the first sealed space S1. The scroll 12 closes the front of the first sealed space S1. The bottom surface portion 75 closes the lower portion of the first sealed space S1.

<Drain pan structure>
The drain pan structure 80a is a portion that receives drain water generated on the surface of the indoor heat exchanger 50 during heat exchange, and is formed of a member whose upper surface is recessed downward. The drain pan structure 80a is formed separately from the fan scroll structure 78a, and is attached to the upper surface of the fan scroll structure 78a. As shown in FIG. 9, the drain pan structure 80a includes a front drain pan 81, a rear drain pan 82, a communication passage 83, a fan support member 88, front and rear support portions 23a (see FIG. 5), and a tongue portion 24 (see FIG. 5). is doing. The drain pan structure 80a is integrally formed, and is formed integrally with no seam.

  As shown in FIG. 4, the front drain pan 81 is disposed below the third indoor heat exchanger 50 c, that is, below the front lower end of the indoor heat exchanger 50. The front drain pan 81 has a shape that is long in the left-right direction, and is fixed to the front fixing portion 15 of the drain pan fixing portion 13. As shown in FIG. 7, the edge of the front drain pan 81 is folded outward and downward, and is provided with a front recess 152. The front concave portion 152 has a concave shape with an opening at the bottom, and is provided over substantially the entire length of the front drain pan 81. The front concave portion 152 constitutes the front seal structure 150 together with the front convex portion 151 of the front fixing portion 15 of the drain pan fixing portion 13 and the front seal member 155 described later, and is fitted to the front convex portion 151.

  The rear drain pan 82 is arranged below the fourth indoor heat exchanger 50 d, that is, the lower rear lower end of the indoor heat exchanger 50. The rear drain pan 82 has a shape that is long in the left-right direction, and is fixed to the rear fixing portion 16 of the drain pan fixing portion 13. The edge of the rear drain pan 82 is folded outward and downward, and a rear recess 162 is provided. The rear concave portion 162 has a concave shape with an opening at the bottom, and is provided over substantially the entire length of the rear drain pan 82 in the longitudinal direction. The rear concave portion 162 constitutes a rear seal structure 160 together with the rear convex portion 161 and the rear seal member 165 of the rear fixing portion 16 of the drain pan fixing portion 13 and is fitted to the rear convex portion 161.

  The front drain pan 81 and the rear drain pan 82 are arranged on the front and rear sides with the cross flow fan 71 interposed therebetween. The front drain pan 81 and the rear drain pan 82 are located at substantially the same height, and the bottom surfaces of the front drain pan 81 and the rear drain pan 82 are located lower than the height of the central axis of the cross flow fan 71, so that indoor heat exchange is performed. Located near the lower end of the vessel 50. Further, the front drain pan 81 and the rear drain pan 82 are each slightly inclined along the longitudinal direction so that the bottom surfaces for receiving the drain water are located below the left side on the right side.

  The communication path 83 is fixed to the right side portion of the fan scroll structure 78a, and allows the front drain pan 81 and the rear drain pan 82 to communicate with each other only at the right ends of the front drain pan 81 and the rear drain pan 82. That is, the front drain pan 81 and the rear drain pan 82 are communicated only on the side inclined downward. Further, no communication passage 83 is provided in the left side portion of the fan scroll structure 78a, and the front drain pan 81 and the rear drain pan 82 do not communicate with each other at the left end of the front drain pan 81 and the rear drain pan 82. The communication passage 83 is fixed to the right fixing portion 17 of the drain pan fixing portion 13 and is disposed on the right side of the indoor fan motor 72. For this reason, when viewed from above, the cross flow fan 71, the indoor fan motor 72, and the communication path 83 are arranged in the left-right direction (the longitudinal direction of the indoor unit 2) in this order. Further, the edge of the communication path 83 is folded outward and downward, and is provided with a right recess (not shown). Similar to the front recess 152 and the rear recess 162, the right recess has a concave shape that opens downward, and is provided over substantially the entire front and rear direction of the communication path 83. The right concave portion is fitted to the right convex portion of the right fixing portion 17 of the drain pan fixing portion 13. The communication passage 83 is provided with a discharge port (not shown) for discharging drain water. The discharge port penetrates downward from the bottom surface of the communication passage 83 and communicates with the inside of a drain hose (not shown) for discharging drain water from the drain pan structure 80a to the outside. The drain water dripped from the indoor heat exchanger 50 is received by the front drain pan 81 and the rear drain pan 82, collected in the communication passage 83, and discharged from the discharge port to the outside through the drain hose.

  The fan support member 88 is disposed on the left side of the cross flow fan 71 and rotatably supports the cross flow fan 71. The fan support member 88 is located between the left ends of the front drain pan 81 and the rear drain pan 82, and is located on the side opposite to the communication path 83 side of the cross flow fan 71.

  As shown in FIG. 5, the front and rear support portion 23 a supports the indoor fan motor 72 and restricts the movement of the indoor fan motor 72 in the front-rear direction and the left-right direction. As shown in FIG. 8, the front / rear support part 23 a has a front support part 25 a that supports the front protrusion part 28 of the indoor fan motor 72 and a rear support part 26 a that supports the front protrusion part 28 of the indoor fan motor 72. .

  The front support portion 25 a is provided in the vicinity of the right end of the front drain pan 81 and is provided inside a corner portion where the front drain pan 81 and the communication path 83 are connected. The front support portion 25a has a wall-like shape provided so as to surround the front and left and right sides of the front protrusion 28 of the indoor fan motor 72. The front support portion 25 a supports the front protrusion portion 28 by fitting the inner surface of the front support portion 25 a with the front protrusion portion 28 of the indoor fan motor 72. Further, the outer surface of the front support portion 25 a constitutes an inner wall inside the front drain pan 81 and the communication path 83. That is, the front support portion 25 a constitutes a wall surface between the motor housing portion 20 a and the water path of the front drain pan 81 and the communication passage 83. The front support portion 25 a protrudes upward from the upper ends of the front drain pan 81 and the communication path 83, and is positioned above the rotation center of the indoor fan motor 72. In a state where the drain pan structure 80a is attached to the fan scroll structure 78a, the lower end of the front support portion 25a matches the upper end on the front side of the motor housing portion 20a, and the front support portion 25a is located above the motor housing portion 20a from above. It will be in the state which protruded.

  The rear support portion 26 a is provided in the vicinity of the right end of the rear drain pan 82 and is provided inside a corner portion where the rear drain pan 82 and the communication path 83 are connected. The rear support portion 26a has a wall-like shape provided so as to surround the rear and left and right sides of the rear protrusion 29 of the indoor fan motor 72. The rear support part 26 a supports the rear protrusion part 29 by fitting the inner surface of the rear support part 26 a with the rear protrusion part 29 of the indoor fan motor 72. Further, the outer surface of the rear support portion 26 a constitutes an inner wall inside the rear drain pan 82 and the communication path 83. That is, the rear support portion 26 a constitutes a wall surface between the motor housing portion 20 a and the water path of the rear drain pan 82 and the communication passage 83. The rear support portion 26 a protrudes upward from the upper ends of the rear drain pan 82 and the communication passage 83, and is positioned above the rotation center of the indoor fan motor 72. In a state in which the drain pan structure 80a is attached to the fan scroll structure 78a, the lower end of the rear support portion 26a matches the upper end of the rear side of the motor housing portion 20a, and the rear support portion 26a extends from the upper portion of the motor housing portion 20a. It will be in the state which protruded upwards.

  The tongue portion 24 is a member that continuously extends upward from the wall surface of the rear drain pan 82 and has a shape that is long in the left-right direction so as to cover the back of the cross flow fan 71. The tongue 24 is connected to the rear end of the fan accommodating portion 10a in a state where the drain pan structure 80a is attached to the fan scroll structure 78a, and between the rear drain pan 82 and the crossflow fan 71, the fan scroll structure It is provided so as to protrude upward from the upper surface of 78a. The tongue 24 covers the back of the cross flow fan 71, and the upper end of the tongue 24 is located at a slightly lower height than the top portion of the cross flow fan 71. The tongue portion 24 is smoothly connected to the upper end of the fan accommodating portion 10a of the fan scroll structure 78a, thereby guiding the air flow generated by the cross flow fan 71 together with the fan accommodating portion 10a. The tongue 24 is positioned higher than the rotation center of the cross flow fan 71, but the tongue 24 has a thin wall shape and is a relatively small member compared to the fan scroll structure 78a. . Accordingly, the tongue 24 is less likely to reduce the conveyance of the entire lower unit 7.

  Further, as described above, the front drain pan 81, the rear drain pan 82, and the communication passage 83 are provided with the recesses 152 and 162 opened at the bottom, and the convex portions 151 and 161 at the edge of the drain pan fixing portion 13 and the drain pan structure. The recesses 152 and 162 at the edge of the body 80a are fitted to form the seal structures 150 and 160. In the state where the drain pan fixing part 13 and the drain pan structure 80a are fixed, the bottom surfaces of the concave parts 152, 162 of the drain pan structure 80a facing the tips of the convex parts 151, 161 of the drain pan fixing part 13 are sealed with the sealing materials 155, 165. Is provided. A front sealing material 155 is provided on the bottom surface 154 of the front concave portion 152 of the front drain pan 81 facing the front end 153 of the front convex portion 151 of the front fixing portion 15. The front sealing material 155 has a thickness larger than that of the front convex portion 151 and is provided over the entire thickness direction inside the front concave portion 152. The front seal material 155 is formed of a flexible material such as a foam material, and when the front convex portion 151 is inserted into the front concave portion 152, the front seal material 155 is compressed by the tip 153 of the front convex portion 151 to be front convex. It deform | transforms so that the front-end | tip 153 of the part 151 may be covered. Accordingly, since the gap between the fixed portions of the drain pan fixing portion 13 and the drain pan structure 80a is filled with the front seal member 155, air, drain water, and the like may enter and exit from the gap between the drain pan fixing portion 13 and the drain pan structure 80a. It is prevented.

  The rear seal structure 160 that fixes the rear drain pan 82 and the rear fixing portion 16 is also the same structure as the front seal structure 150, and the gap between the rear convex portion 161 and the rear concave portion 162 is filled with the rear seal material 165.

<Cross flow fan>
The cross flow fan 71 is configured in a long and thin cylindrical shape, and is arranged so that the central axis is parallel to the horizontal direction. Blades are provided on the peripheral surface of the crossflow fan 71, and the crossflow fan 71 rotates around the central axis to generate an air flow. This air flow is a flow of air taken in from the front inlet 601 and the top inlet 611 shown in FIG. 4 and blown out from the outlet 11 through the indoor heat exchanger 50 into the room. The cross flow fan 71 is located at the approximate center of the indoor unit 2 in a side view, and is disposed between the front drain pan 81 and the rear drain pan 82 in a top view. The cross flow fan 71 is supported by the fan scroll structure 78a, and the upper half of the supported cross flow fan 71 projects upward from the upper surface of the fan scroll structure 78a.

<Indoor fan motor>
The indoor fan motor 72 rotates the cross flow fan 71 around the central axis. As shown in FIG. 5, the indoor fan motor 72 has a thin cylindrical shape having substantially the same diameter as the cross flow fan 71. The indoor fan motor 72 is arranged coaxially with the cross flow fan 71 on the right side of the cross flow fan 71. When the indoor fan motor 72 is attached to the fan scroll structure 78a, the indoor fan motor 72 and the cross flow fan 72 are cross-flowed. The height of the top portion of the fan 71 is substantially the same. The indoor fan motor 72 is an outer rotor type motor and includes the outer rotor 18 and the stator 19. The outer rotor 18 is directly fixed to the right end of the cross flow fan 71. A coil is provided inside the stator 19, and the stator 19 rotates the outer rotor 18.

  In the indoor unit 2 of the air conditioner 1, by using the outer rotor type indoor fan motor 72, the crossflow fan 71 and the indoor fan motor 72 can be directly fixed, and the left and right direction of the fan housing portion 10a The shape can be reduced in size. Therefore, the indoor unit 2 can be downsized.

  Moreover, the stator 19 has the some protrusion part 27-29 which protrudes from the side surface of the main body, as shown in FIG. The protrusions 27-29 include a lower protrusion 27, a front protrusion 28, and a rear protrusion 29. The lower protruding portion 27 protrudes downward from the lower cylindrical side surface of the main body of the stator 19. The front protruding portion 28 protrudes forward from the front cylindrical side surface of the main body of the stator 19. The rear projecting portion 29 projects rearward from the rear cylindrical side surface of the main body of the stator 19. A rubber stopper is attached to each of the projecting portions 27-29, and is fitted into the lower support portion 21a and the front and rear support portions 23a described above.

<Electrical component box>
FIG. 10 shows a side view of the lower unit 7 in a state where the electrical component box 73 is attached. The electrical component box 73 accommodates a control board for controlling the operation of the indoor unit 2. The electrical component box 73 is disposed between the lower right side surface portion 76 of the lower unit 7 and the fan scroll structure 78 a and is located on the right side of the indoor heat exchanger unit 5. The electrical component box 73 is attached to and supported by the right side surface of the fan scroll structure 78a on the right side of the indoor fan motor 72. In addition, the upper surface of the electrical component box 73 is positioned at substantially the same height as the top portion of the indoor fan motor 72, that is, the top portion of the cross flow fan 71, when supported by the lower unit 7.

  In the lower unit 7, each part such as the indoor fan motor 72, the electrical component box 73, the drain pan structure 80 a is positioned below the height of the top part of the crossflow fan 71 supported by the lower unit 7. The lower unit 7 as a whole has a relatively small size in the height direction.

<Features>
(1)
In order to reduce the size of the fan scroll structure 78a, if the structure is such that the upper surface of the fan scroll structure 78a is below the rotation center of the crossflow fan 71 and the indoor fan motor 72, the indoor fan motor 72 is appropriately supported. Difficult to do. That is, a support structure that covers the front and rear of the indoor fan motor 72 is necessary to reliably restrict the movement of the indoor fan motor 72 in the front and rear. However, when the upper surface of the fan scroll structure 78a is less than or equal to the rotation center of the cross flow fan 71 and the indoor fan motor 72, there are few portions covering the front and rear of the indoor fan motor 72, and reliable fixing is difficult.

  However, in the indoor unit 2 of the air conditioner 1, the drain pan structure 80a is provided with the front and rear support portions 23a, and the front and rear support portions 23a are in a state where the drain pan structure 80a is attached to the fan scroll structure 78a. The fan scroll structure 78a is provided so as to protrude upward. Therefore, the fan scroll structure 78a can be reduced in size, and the front and rear of the indoor fan motor 72 can be more reliably supported by the front and rear support portions 23a.

  In addition, as described above, the fan scroll structure 78a reliably secures the indoor fan motor 72 by the front and rear support portions 23a of the drain pan structure 80a even when the indoor heat exchanger unit 5 is not attached from above. Can be supported. Therefore, even in the state of only the lower unit 7 to which the indoor heat exchanger unit 5 is not attached, the indoor fan motor 72 is less likely to come off and the transportability of the lower unit 7 is improved.

(2)
In the indoor unit 2 of the air conditioner 1, the outer surface of the front / rear support portion 23 a is formed so as to also serve as a part of the inner wall of the front drain pan 81, the rear drain pan, and the communication path 83. In addition, the drain pan structure 80a is downsized as compared with the case where the wall surfaces of the front drain pan 81, the rear drain pan 82, and the communication path 83 are separately provided. For this reason, size reduction of the indoor unit 2 is possible.

  Further, although the outer surface of the front / rear support portion 23a is formed so as to also serve as a part of the inner wall of the front drain pan 81, the rear drain pan 82, and the communication passage 83, the front / rear support portion 23a, the front drain pan 81, the rear drain pan, and the communication passage 83 are formed. Are integrally molded, and therefore there is no seam between the front and rear support portion 23 a and the front drain pan 81, the rear drain pan and the communication passage 83. For this reason, it is prevented that water leaks by the joint.

(3)
In the indoor unit 2 of the air conditioner 1, the lower support portion 21a is integrally formed with the fan housing portion 10a. For this reason, the positioning accuracy of the axial center of the indoor fan motor 72 and the crossflow fan 71 and the fan scroll structure 78a is improved. Thereby, the wind performance which receives the influence of arrangement | positioning with the crossflow fan 71 and the fan scroll structure 78a is improving.

(4)
In the indoor unit 2 of the air conditioner 1, the fan scroll structure 78a is positioned below the rotation center of the cross flow fan 71 and the indoor fan motor 72, and the upper surface of the fan scroll structure 78a has a substantially flat shape. ing. For this reason, the fan scroll structure 78a is miniaturized and has a relatively simple shape. For this reason, the transportability and assemblability of the lower unit 7 are improved.

(5)
In the indoor unit 2 of the air conditioner 1, since the second sealed space S2 and the third sealed space S3 functioning as an air heat insulating layer are formed inside, it is possible to suppress internal condensation.

Further, since the second sealed space S2 and the third sealed space S3 are formed by the fan scroll structure 78a and the drain pan structure 80a formed separately, the second sealed space S2 and the third sealed space S3 Can be easily formed.
Example 2
<Configuration>
As shown in FIG. 11, the lower support portion 21 b may be provided on the drain pan structure 80 b and may be formed integrally with the front drain pan 81, the rear drain pan 82, and the communication path 83. That is, the fan accommodating portion 10b of the fan scroll structure 78b is not provided with a support portion that supports the indoor fan motor 72, and the front support portion 25b, the rear support portion 26b, and the lower support portion 21b are all provided in the drain pan structure 80b. Provided. In this case, a part near the right end of the motor housing portion 20 b is formed integrally with the front drain pan 81, the rear drain pan 82 and the communication passage 83. The motor accommodating portion 20b is divided into a portion provided in the drain pan structure 80b and a portion provided in the fan scroll structure 78b, and the motor accommodating portion is provided by attaching the drain pan structure 80b to the fan scroll structure 78b. Both parts of 20b are connected continuously.

  In the present embodiment, the lower support portion 21b is integrally formed with the front drain pan 81, the rear drain pan 82, and the communication passage 83, but the lower support portion in a state where the drain pan structure 80b is attached to the fan scroll structure 78b. The positional relationship between the unit 21b and the indoor fan motor 72 and the like is the same as that in the first embodiment. Other configurations are the same as those in the first embodiment.

<Features>
Even with such a support structure, the front and rear of the indoor fan motor 72 can be more reliably supported by the front and rear support portions 23b while downsizing the fan scroll structure 78b as in the first embodiment.

Similarly to the first embodiment, since the outer surface of the front and rear support portion 23b also serves as the inner wall of the front drain pan 81, the rear drain pan 82, and the communication path 83, the front drain pan 81 and the rear drain pan 81 are separately provided outside the outer surface of the front and rear support portion 23b. Compared with the case where the wall surfaces of the drain pan 82 and the communication passage 83 are provided, the drain pan structure 80b is downsized. Furthermore, since there is no joint between the front and rear support portion 23b and the front drain pan 81, the rear drain pan 82, and the communication path 83, occurrence of water leakage due to the joint is prevented.
《 Reference example 》
<Configuration>
As shown in FIG. 12, the front / rear support portion 23c may be formed integrally with the fan accommodating portion 10c of the fan scroll structure 78c. That is, the front and rear support portions 23c are not integrally provided with the front drain pan 81, the rear drain pan 82, and the communication passage 83 of the drain pan structure 80c, but all of the front support portion 25c, the rear support portion 26c, and the lower support portion 21c are provided. The fan scroll structure 78c is provided integrally with the motor housing portion 20c of the fan housing portion 10c. In this case, the front drain pan 81, the rear drain pan 82, and the communication path 83, which are separate from the front and rear support portions 23c, are attached to the front and rear and the sides of the front and rear support portions 23c.

In this reference example , the front / rear support part 23c is formed integrally with the fan housing part 10c, but the front / rear support part 23c and the indoor fan motor 72 in a state where the drain pan structure 80c is attached to the fan scroll structure 78c. The positional relationship with these is the same as that of the first embodiment. Other configurations are the same as those in the first embodiment.

<Features>
Even with such a support structure, the front and rear of the indoor fan motor 72 can be more reliably supported by the front and rear support portions 23c while downsizing the fan scroll structure 78c, as in the first embodiment.

  Further, since the front / rear support portion 23c and the lower support portion 21c are provided integrally with the fan housing portion 10c in the fan scroll structure 78c, the axial centers of the indoor fan motor 72, the cross flow fan 71, and the fan scroll structure 78c. The positioning accuracy is improved. Thereby, the wind performance which receives the influence of arrangement | positioning with the crossflow fan 71 and the fan scroll structure 78c improves.

  Further, although the drain pan structure 80c is slightly larger, the seam is formed by providing the drain pan structure 80c with the wall surfaces constituting the inner surfaces of the front drain pan 81, the rear drain pan 82 and the communication passage 83 separately from the outer surface of the front and rear support portion 23c. It is possible to prevent the occurrence of water leakage due to.

  According to the present invention, the fan scroll structure can be downsized and the fan motor can be appropriately supported, and is useful as an indoor unit of an air conditioner.

The external view of an air conditioner. The schematic diagram of a refrigerant circuit. (A) Front view of indoor unit (b) Side view of indoor unit Side surface sectional drawing of an indoor unit. The external appearance perspective view of a lower unit and an indoor heat exchanger unit. The external appearance perspective view of a bottom casing. Side surface sectional drawing of a lower unit. The external appearance perspective view which shows a part of fan scroll structure and a drain pan structure. The external appearance perspective view of a fan scroll structure and a drain pan structure. The side view of a lower unit. The external appearance perspective view which shows a part of fan scroll structure and a drain pan structure. The external appearance perspective view which shows a part of fan scroll structure and a drain pan structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Indoor unit 10a-10c Fan accommodating part (accommodating part)
18 Outer rotor 21a-21c Lower support part 23a-23c Front and rear support part 27 Lower protrusion part (lower part of fan motor)
28 Front protrusion (front of fan motor)
29 Rear protrusion (rear part of fan motor)
71 Cross flow fan
72 Indoor fan motor (fan motor)
78a-78c Fan scroll structure 80a-80c Drain pan structure 81 Front drain pan (drain pan)
82 Rear drain pan (drain pan)
83 Communication passage (drain pan)
S2 Second sealed space (internal space)
S3 Third sealed space (internal space)

Claims (7)

A blower fan (71);
A fan motor (72) disposed on the side of the blower fan (71) to rotationally drive the blower fan (71);
A housing part (10a) that houses the blower fan (71) and the fan motor (72) and is located below the rotation center of the fan motor (72), and is formed integrally with the housing part (10a). A fan scroll structure (78a) having a lower support part (21a) for supporting a lower part (27) of the fan motor (72);
A drain pan (81-83) disposed adjacent to the front and rear sides and the side of the housing portion (10a) and a front portion (28 of the fan motor (72) formed integrally with the drain pan (81-83). ) And a front and rear support part (23a) for supporting the rear part (29), and a drain pan structure (80a) formed separately from the fan scroll structure (78a),
An indoor unit (2) of an air conditioner (1) comprising: A blower fan (71);
A fan motor (72) disposed on the side of the blower fan (71) to rotationally drive the blower fan (71);
A fan scroll structure (78b) that houses the blower fan (71) and the fan motor (72) and has a housing part (10b) located below the rotation center of the fan motor (72);
A drain pan (81-83) disposed adjacent to the front and rear and the side of the housing portion (10b), and a lower portion (27) of the fan motor (72) formed integrally with the drain pan (81-83). A lower support part (21b) that supports the front and rear support parts (23b) that are formed integrally with the drain pan (81-83) and support the front part (28) and the rear part (29) of the fan motor (72). A drain pan structure (80b) formed separately from the fan scroll structure (78b), and
An indoor unit (2) of an air conditioner (1) comprising: The front and rear support portions (23a, 23b) also serve as a part of the drain pan (81-83).
The indoor unit (2) of the air conditioner (1) according to claim 1 or 2. The front / rear support parts (23a, 23b) have a wall-like shape standing upright so as to surround the front part (28) and the rear part (29) protruding from the main body of the fan motor (72),
The inner surfaces of the front and rear support portions (23a, 23b) fix the fan motor (72),
The outer surfaces of the front and rear support portions (23a, 23b) constitute a part of the side wall of the drain pan (81-83).
The indoor unit (2) of the air conditioner (1) according to claim 3. The fan scroll structure (78a, 78b) is located below the rotation center of the fan motor (72).
The indoor unit (2) of the air conditioner (1) according to any one of claims 1 to 4. The fan motor (72) is a motor having an outer rotor (18), and the outer rotor (18) is directly fixed to the blower fan (71).
The indoor unit (2) of the air conditioner (1) according to any one of claims 1 to 5. The fan scroll structure (78a, 78b) is an internal space that functions as an air insulation layer by being closed from the outside by attaching the drain pan structure (80a, 80b) to the fan scroll structure (78a, 78b). (S2, S3)
The indoor unit (2) of the air conditioner (1) according to any one of claims 1 to 6.

Images