JP2012255610A - Air conditioner indoor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner indoor unit capable of achieving miniaturization.SOLUTION: The indoor unit 11 includes: a fan 13; a pair of heat exchangers 15 arranged on both sides of the fan 13; an electric component holding part 51; a case 20 for receiving the fan 13, the electric component holding part 51, and the pair of heat exchangers 15, and having a pair of blowing ports 25b on both sides thereof; and an receiving part 58B for receiving the pipe of cooling medium. The receiving part 58B is provided below the fan 13 and the pair of heat exchangers 15. The electric component holding part 51 is arranged in front of the receiving part 58B.

Description

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

  For example, Patent Document 1 proposes an indoor unit in which a heat exchanger is disposed on both sides of a turbofan to reduce the thickness. In this indoor unit, the air sucked into the case from the front surface of the case passes through the heat exchanger, and is blown forward from the air outlet provided on the front surface of the case. In the indoor unit disclosed in Patent Document 1, it is not necessary to separately secure a space for the refrigerant pipe by arranging the refrigerant pipe connecting the pair of heat exchangers in the drain pan. It can be done.

JP 2009-139078 A

  By the way, in recent years, for indoor units, it is desired to continue to achieve compactness. However, in Patent Document 1, electrical equipment, indoors such as refrigerant pipes (connection pipes) used for connection to outdoor units, and the like are used. The arrangement of other components essential to the machine is not considered. The arrangement of these components is an important element for realizing compactness.

  Therefore, the present invention has been made in view of such points, and an object of the present invention is to provide an indoor unit for an air conditioner that can be made compact.

  (1) The indoor unit for an air conditioner of the present invention includes a blower (13), a pair of heat exchangers (15) disposed on both sides of the blower (13), and electrical component holding for holding electrical components. A case (20) that houses a part (51), the blower (13), the electrical component holding part (51), and the pair of heat exchangers (15) and has a pair of outlets (25b) on both sides And a housing part (58B) for housing the refrigerant pipe (57). The housing part (58B) is provided below the blower (13) and the pair of heat exchangers (15). The electrical component holding part (51) is arranged at a position aligned forward with respect to the housing part (58B).

  In this configuration, in the indoor unit having a structure in which the air sent from the blower (13) to the heat exchangers on both sides is blown out from the air outlets (25b) on both sides of the case (20), the electrical component holding unit ( 51) and a housing part (58B) for housing the refrigerant pipe (57) are disposed below the blower (13) and the pair of heat exchangers (15). Therefore, it is possible to suppress an increase in the thickness in the front-rear direction and the width in the left-right direction due to the arrangement of the electrical component holding part (51) and the accommodating part (58B). In addition, below the blower (13) and the pair of heat exchangers (15), the electrical component holding part (51) is arranged at a position aligned forward with respect to the housing part (58B), so The increase in height can be minimized. Furthermore, since the electrical component holding part (51) is arranged in front, the operator can easily perform maintenance work on the electrical component holding part (51) in front of the indoor unit.

  (2) In the indoor unit for an air conditioner, when the housing part (58B) is a recessed part recessed forward from the back surface of the case (20), the operator is used for connection with, for example, an outdoor unit. Refrigerant piping (communication piping) can be easily taken out rearward from the recess. Therefore, the efficiency of the connection work with the outdoor unit is improved.

  (3) The indoor unit for an air conditioner further includes a drain pan (30) disposed below the pair of heat exchangers (15), and the case (20) includes a bottom plate (21), The electrical component holding part (51) and the storage part (58B) are located between the drain pan (30) and the bottom plate (21), and the lower surface of the drain pan (30) is the storage part ( Preferably, the upper part of 58B) is partitioned, and the upper surface of the bottom plate (21) partitions the lower part of the accommodating part (58B).

  In this configuration, the upper part and the lower part of the housing part (58B) are partitioned by the lower surface of the drain pan (30) and the upper surface of the bottom plate (21), respectively, so that the upper part and the lower part of the housing part (58B) are separated. There is no need to prepare a separate member. As a result, the number of parts can be reduced, and a space for disposing another member becomes unnecessary, so that further downsizing can be realized.

  (4) In the indoor unit for an air conditioner, the electrical component holding portion (51) includes an electrical component case that accommodates the electrical component, and a rear surface of the electrical component case is a front side of the accommodating portion (58B). It is preferable that the end portion is defined.

  In this configuration, since the front end portion in the housing portion (58B) is partitioned by the back surface of the electrical component case, it is not necessary to separately prepare another member for partitioning the front end portion in the housing portion (58B). As a result, the number of parts can be reduced, and a space for disposing another member becomes unnecessary, so that further downsizing can be realized.

  (5) In the indoor unit for an air conditioner, the housing part (58B) has an opening (61) that opens to a back surface of the case (20), and the drain pan (30) has the pair of heats. A bottom part (30D) facing the lower part of the exchanger (15), and a rear wall (30B) standing upward from a rear edge of the bottom part (30D), the bottom part (30D) and the rear wall (30B) The boundary portion defines the upper edge of the opening (61), and has an outer surface curved so that the opening width in the vertical direction of the opening (61) increases toward the rear. Is preferred.

  In this configuration, since the boundary portion has a curved outer surface, the operation of housing the refrigerant pipe (57) in the housing part (58B) through the opening (61) or the refrigerant pipe (57 ) To take out the work more efficiently.

  ADVANTAGE OF THE INVENTION According to this invention, size reduction of the indoor unit for air conditioners is realizable.

It is a perspective view which shows the indoor unit for air conditioners which concerns on one Embodiment of this invention. It is a perspective view which shows the internal structure of the indoor unit for air conditioners shown in FIG. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. (A) is a schematic front view for demonstrating the internal structure of the said indoor unit for air conditioners, (B) is a schematic rear view of the said indoor unit for air conditioners. It is a perspective view which shows the heat exchanger of the said indoor unit for air conditioners. It is a schematic front view which shows the internal structure of the said indoor unit for air conditioners.

  Hereinafter, an indoor unit 11 for an air conditioner according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the indoor unit 11 includes a blower 13, a pair of heat exchangers 15 and 15 disposed on both sides of the blower 13, and the blower 13 and the heat exchangers 15 and 15. A drain pan 30 disposed in the lower part D and a case 20 for housing them are provided. In the following description, the upper U, lower D, right R, left L, front F, and rear B of the indoor unit 11 are directions indicated by arrows in FIGS. 1 and 2.

  The case 20 has a rectangular parallelepiped shape with a small thickness in the front-rear direction and a larger width in the left-right direction than in the vertical direction. The indoor unit 11 has a cross section in which a blower 13 (a mixed flow blower in the present embodiment) such as a mixed flow blower or a centrifugal blower is disposed in the case 20 in a posture in which the axial direction A of the rotating shaft is directed in the front-rear direction. Compared to the case of using a flow fan, the thickness is reduced in the front-rear direction. In addition, the indoor unit 11 is thinned in the front-rear direction by inclining the heat exchanger 15 with respect to the front-rear direction and placing it in the case 20. The indoor unit 11 is downsized in the vertical direction by disposing the heat exchanger 15 on both sides of the blower 13. In this indoor unit 11, the air sucked from the front part of the case 20 flows to the outside in the radial direction of the blower 13, and after heat exchange is performed in the heat exchanger 15 on the right R or left L, It blows out into the room from the side (see FIG. 4).

  As shown in FIGS. 1, 3 and 5A and 5B, the case 20 includes a bottom plate 21, a top plate 22, a right side plate 23, a left side plate 24, a front plate 25, a back plate 26, and a bell mouth. Has 28. The decorative front plate 25 includes a suction port opening / closing plate 251 and a pair of outlet opening / closing plates 252 and 252 disposed on both sides of the suction port opening / closing plate 251.

  The air inlet opening / closing plate 251 is disposed in front F of the blower 13 and has a rectangular shape that occupies most of the area of the decorative front plate 25. The right outlet opening / closing plate 252 is disposed in front F of the right heat exchanger 15 and has a rectangular shape that is long in the vertical direction. The left outlet opening / closing plate 252 is disposed in front F of the left heat exchanger 15 and has a rectangular shape that is long in the vertical direction.

  On the right side of the back plate 26, there is an inclined wall 26R that is inclined so as to be positioned forward F toward the right R. The right side of the heat exchanger 15 is adjacent to the inclined wall 26R. Are arranged to be. The left side of the back plate 26 is provided with an inclined wall 26L that is inclined so as to be positioned forward F toward the left L. The left side of the heat exchanger 15 is adjacent to the inclined wall 26L. (Figs. 2 and 4). A corner frame 27 is disposed outside the inclined wall 26R.

  The bell mouth 28 has a suction port 25a that opens circularly in the front-rear direction, and is disposed between the front plate 25 and the blower 13. The case 20 is provided with a pair of air outlets 25b for blowing the air in the case 20 into the room. The pair of air outlets 25b are provided on the right side R and the left side L of the air inlet 25a when viewed from the front, and are located directly behind the air outlet opening / closing plates 252 and 252.

  The suction opening / closing plate 251 is supported on the bottom plate 21 and the top plate 22 via a support member (not shown) so as to be movable back and forth in the front-rear direction with respect to the bottom plate 21 and the top plate 22. When the indoor unit 11 is not used, the suction port opening / closing plate 251 is in a closed state in which the suction port 25a is closed as shown by a solid line in FIG. On the other hand, when the indoor unit 11 is used, the suction port opening / closing plate 251 moves forward F as shown by a two-dot chain line in FIG. 1, and the upper edge portion 251a, the lower edge portion 251b, and the side edge portions of the suction port opening / closing plate 251 are moved. A gap is formed between the front edge portion 21a of the bottom plate 21, the front edge portion 22a of the top plate 22, and the side edge portions of the air outlet opening / closing plates 252 and 252, and air flows into the case 20 from these gaps.

  The right outlet opening / closing plate 252 is supported by the front edge portion 21a of the bottom plate 21 and the front edge portion 22a of the top plate 22 so as to be rotatable about the left edge portion 252a. When the indoor unit 11 is not used, the air outlet 25b is closed by the air outlet opening / closing plate 252 as shown by a solid line in FIG. On the other hand, when the indoor unit 11 is used, the air outlet opening / closing plate 252 rotates forward F around the left edge portion 252a, and the right edge portion 252b of the air outlet opening / closing plate 252 and the right edge portion 252b of FIG. A gap is formed between the front edge portion 23a of the right side plate 23, and the air in the case 20 flows into the room from this gap. The operation of the left outlet opening / closing plate 252 is the same as this.

  The drain pan 30 is disposed below the blower 13 and the pair of heat exchangers 15. The drain pan 30 is open at the top and has a water storage space 33 for storing water. The water storage space 33 is provided in a range extending over the right heat exchanger 15 and the left heat exchanger 15. The drain pan 30 has a bottom 30D that faces the lower ends of the pair of heat exchangers 15, and a wall that rises upward from the periphery of the bottom 30D. The bottom 30D is a flat plate-like part parallel to the bottom plate 21 of the case 20. The water accommodation space 33 is a space defined by the bottom 30D and the wall.

  The wall portion rises from the front wall 30F rising from the front edge of the bottom portion 30D, the rear wall 30B rising from the rear edge of the bottom portion 30D, the right wall 30R rising from the right edge of the bottom portion 30D, and the left edge of the bottom portion 30D. Including the left wall 30L. The right wall 30R is located on the right side R with respect to the right heat exchanger 15, and the left wall 30L is located on the left side L with respect to the left heat exchanger 15.

  The drain pan 30 has a two-layer structure including a drain pan main body 31 and a heat insulating material 32 that covers substantially the entire outer surface of the drain pan main body 31. The drain pan main body 31 is integrally formed with the back plate 26 of the case 20, and the rear wall of the drain pan main body 31 and the back plate 26 are connected (FIG. 3).

  3 and 5A and 5B, the drain pan 30 is disposed at a position higher than the bottom plate 21 of the case 20, and the lower surface of the drain pan 30 and the upper surface of the bottom plate 21 of the case 20 are arranged. An accommodation space 58 is formed between them. The case 20 further includes a bottom plate 21 and a lower front plate 29 disposed in front F of the front wall 30F of the drain pan 30. The lower front plate 29 can open and close the front opening of the accommodation space 58. The accommodation space 58 has a flat rectangular parallelepiped shape defined by the inner surface of the lower front plate 29, the upper surface of the bottom plate 21, the inner surface of the right plate 23, the inner surface of the left plate 24, and the lower surface of the drain pan 30. The accommodation space 58 has an opening 61 that opens to the rear B.

  The accommodation space 58 includes a front accommodation part 58A that accommodates an electrical component case 51 as an electrical component holding part, and a rear accommodation part 58B that is arranged behind the front accommodation part 58A and accommodates the drain hose 56 and the refrigerant pipe 57. Including. The rear accommodating portion 58B is a concave portion that is recessed forward F from the back plate 26. The rear housing 58B has an opening 61 that opens on the back surface of the case 20. The operator can take out the drain hose 56, the refrigerant pipe 57, and the like through the opening 61 as necessary. Examples of the refrigerant pipe 57 include a refrigerant communication pipe that connects the indoor unit 11 and an unillustrated outdoor unit. In addition, the operator can set the electrical components by opening the lower front plate 29 of the case 20 during maintenance.

  As shown in FIGS. 2, 3, and 5A, the electrical component case 51 has a flat rectangular parallelepiped shape with a small vertical thickness. An electrical component is held in the electrical component case 51. The electrical component case 51 is placed on the bottom plate 21 of the case 20. The right side surface of the electrical component case 51 is located near the right side plate 23 of the case 20 and faces the right side plate 23. The left side surface of the electrical component case 51 is located near the left side plate 24 of the case 20 and faces the left side plate 24. The upper surface of the electrical component case 51 is located near the lower surface of the drain pan 30, and faces the lower surface. The back surface 51B of the electrical component case 51 is located in the vicinity of the center in the front-rear direction of the accommodation space 58, and defines the front end of the rear accommodation portion 58B.

  As shown in FIGS. 3 and 5B, the lower part of the drain pan 30 on the rear side, that is, the outer surface of the part (rear lower part) 30BD connecting the bottom part 30D and the rear wall 30B has a convex curved shape on the outside. ing. In the rear lower part 30BD of the drain pan 30, the drain pan main body 31 and the heat insulating material 32 are both curved. The rear lower portion 30BD of the drain pan 30 defines the upper edge of the opening 61, and the opening width in the vertical direction of the opening 61 increases toward the rear B. Thereby, the efficiency of the operation of accommodating the drain hose 56 and the refrigerant pipe 57 in the rear side accommodating portion 58B through the opening 61 or the operation of taking out the drain hose 56 and the refrigerant pipe 57 from the rear side accommodating portion 58B is improved.

  On the upper surface of the bottom plate 21, a mounting portion 55 for mounting the drain hose 56, the refrigerant pipe 57, and the like is provided. The mounting portion 55 is a plate-like member, and is bent from the middle in the front-rear direction, and is inclined obliquely upward so as to be positioned in the upper U from the bent portion toward the rear B. As a result, the drain hose 56 and the refrigerant pipe 57 placed on the placement portion 55 are suppressed from coming out of the case 20 through the opening 61 and are held in the rear side accommodation portion 58B.

  As shown in FIGS. 2 to 4, the blower 13 of the present embodiment is a mixed flow blower disposed in the case 20 in a posture in which the axial direction A of the rotation shaft thereof is directed in the front-rear direction. The blower 13 includes an impeller 131 and a motor 132 that rotates the impeller 131. The motor 132 is fixed to the inner surface of the back plate 26 of the case 20. The impeller 131 includes a hub 131a fixed to the rotation shaft of the motor 132, a shroud 131b having an opening into which the rear end of the bell mouth 28 is inserted, and a circumferential direction between the shroud 131b and the hub 131a. And a plurality of blades 131c arranged in a row (FIG. 3).

  When the impeller 131 is rotated by the motor 132, the air sucked into the case 20 from the suction port 25a flows into the impeller 131 toward the rear B as shown by a two-dot chain line in FIG. The vehicle travels diagonally backward and flows out from the impeller 131 outward in the radial direction. The outflowed air passes through the right heat exchanger 15 or the left heat exchanger 15 and is blown into the room from the right outlet 25b or the left outlet 25b.

  The right heat exchanger 15 is arranged on the right side R of the blower 13, and the left heat exchanger 15 is arranged on the left side L of the blower 13. Each heat exchanger 15 is positioned downstream of the blower 13 in the air flow direction. Each heat exchanger 15 has a rectangular parallelepiped shape that is long in the vertical direction, the lower end portion is located in the drain pan 30, and the upper end portion is close to or abuts on the top plate 22. As shown in FIG. 4, the right heat exchanger 15 is disposed so as to be inclined with respect to the front-rear direction so that the front surface portion 15F is located on the left side L with respect to the rear surface portion 15B. Similarly, the left heat exchanger 15 is disposed so as to be inclined with respect to the front-rear direction so that the front surface portion 15F is positioned on the right side R with respect to the rear surface portion 15B.

  As shown in FIG. 6, each heat exchanger 15 includes a plurality of metal tubes 16 having a flat shape and a plurality of heat transfer fins 17. Each heat transfer fin 17 is disposed between the metal tubes 16 and 16. Each metal tube 16 is formed with a coolant channel (not shown) extending in the vertical direction. The heat exchanger 15 of the present embodiment is a micro-channel type heat exchanger (for example, an aluminum laminated heat exchanger) having a small size and high heat exchange efficiency. The metal tube 16 is a multi-hole tube in which a plurality of refrigerant channels are formed, and the heat transfer fins 17 are corrugated fins (corrugated fins).

  Each heat exchanger 15 is provided in a heat exchange region 151 in which air and refrigerant exchange heat, a lower header portion 152 provided below the heat exchange region 151 D, and above the heat exchange region 151 U. The upper header portion 153 is provided with a metal tube region 154 positioned between the heat exchange region 151 and the lower header portion 152. The header portions 152 and 154 are portions where the refrigerant flowing through the plurality of metal tubes 16 is branched or merged. Refrigerant piping 152a, 152b that connects the pair of heat exchangers 15, 15 to each other is connected to the lower header portion 152.

  The heat exchange region 151 is a region where the plurality of metal tubes 16 and the plurality of heat transfer fins 17 are arranged in the horizontal direction. The metal tube region 154 is a region where only the metal tube 16 is provided among the heat transfer fins 17 and the metal tube 16. That is, the metal tube region 154 is a region where the heat transfer fins 17 are not disposed between the metal tubes 16 and 16.

  As shown in FIGS. 2 to 4, the indoor unit 11 further includes a pair of supercooling heat exchangers 53 and 53. Each subcooling heat exchanger 53 is disposed between the blower 13 and the heat exchanger 15. The refrigerant is supercooled by the supercooling heat exchanger 53 during the cooling operation.

  As shown in FIG. 7, the water storage space 33 of the drain pan 30 has an upstream space 331 located on the upstream side of the air flow with respect to the pair of heat exchangers 15 and 15 and a heat exchanger 15 on the right side. A right downstream space 332 located downstream of the air flow and a left downstream space 333 located downstream of the left heat exchanger 15 in the air flow.

  The upstream space 331 is a region between the inner part of the right heat exchanger 15 and the inner part of the left heat exchanger 15. The right downstream space 332 is a region on the right R side of the outer side portion of the right heat exchanger 15. The left downstream space 333 is an area on the left side of the outer side of the left heat exchanger 15. In the case of the present embodiment, as shown in FIG. 4, each heat exchanger 15 is inclined, so that the inner side portion of the right heat exchanger 15 is the front portion 15F of the heat exchanger 15 and the left side. This refers to the surface portion 15L, and the inside portion of the left heat exchanger 15 refers to the front surface portion 15F and the right surface portion 15R of the heat exchanger 15. Further, the outer portion of the right heat exchanger 15 is referred to as a right surface portion 15R of the heat exchanger 15, and the outer portion of the left heat exchanger 15 is referred to as a left surface portion 15L of the heat exchanger 15.

  As shown in FIG. 7, the water storage space 33 includes a heat exchanger arrangement space 334 between the upstream space 331 and the right downstream space 332, and heat between the upstream space 331 and the left downstream space 333. And an exchanger arrangement space 335. The lower end portion of the right heat exchanger 15 is arranged in the right heat exchanger arrangement space 334, and the lower end portion of the left heat exchanger 15 is arranged in the left heat exchanger arrangement space 335. Yes. In the present embodiment, the lower header portion 152 of the corresponding heat exchanger 15 is disposed in each heat exchanger arrangement space. A gap is formed between the lower end of each lower header portion 152 and the bottom portion 30D of the drain pan 30.

  As shown in FIGS. 2 and 3, the indoor unit 11 of the present embodiment is a partition that partitions the air flow path from the blower 13 to each heat exchanger 15 and the water accommodation space 33 (upstream space 331) of the drain pan 30. A member 41 is further provided. The upper portion of the upstream space 331 is closed by the partition member 41.

  The partition member 41 is a plate-like member arranged in the horizontal direction so as to be bridged between the front wall 30F and the rear wall 30B of the drain pan 30. The partition member 41 is supported by a front support portion 42 extending in a plate shape downward from the front edge and a rear support portion 43 extending in a plate shape downward from the rear edge. The lower end of the front support portion 42 is placed on a placement portion 311 that protrudes rearward B from the inner surface of the lower end portion of the main body front wall of the drain pan main body 31. The lower end of the rear support portion 43 is placed on a placement portion 312 that projects forward F from the inner surface of the main body rear wall of the drain pan main body 31. In this way, the partition member 41 is positioned with respect to the drain pan 30.

  As shown in FIGS. 3 and 7, the lower header portion 152 and the metal pipe region 154 of each heat exchanger 15, and the refrigerant pipes 152 a and 152 b that connect the heat exchangers 15 are arranged below the partition member 41. The water storage space 33 of the drain pan 30 is located. As shown in FIG. 7, each space of the water accommodation space 33, that is, the upstream space 331, the right downstream space 332, the left downstream space 333, and the heat exchanger arrangement spaces 334 and 335 communicate with each other. Refrigerant pipes 152a and 152b that connect the containers 15 to each other can be disposed in the water accommodation space 33. Moreover, it is only necessary to provide one unillustrated discharge means (drain port or drain hose) for discharging the water (condensation water) W stored in the water storage space 33 from the drain pan 30.

  As shown in FIG. 4, the upper part of the right downstream space 332 and the upper part of the left downstream space 333 of the water accommodation space 33 are open. Therefore, the dew condensation water scattered from the heat exchanger 15 to the downstream side of the air flow can be appropriately guided to the water accommodation space 33 of the drain pan 30. Specifically, it is as follows.

  The air that has flowed radially outward from the impeller 131 of the blower 13 flows to the right R or left L, as indicated by the two-dot chain line arrow in FIG. 4, and the right heat exchanger 15 or the left heat exchanger. Go through 15. At this time, if condensed water adheres to the metal tubes 16 and fins 17 of the heat exchanger 15, the condensed water receives a force in the direction of the airflow passing through the heat exchanger 15, so that heat exchange is performed. From the vessel 15 to the downstream side of the air flow. In the present embodiment, since the water storage space 33 having an open top is provided on the downstream side of each heat exchanger 15, the condensed water scattered on the downstream side falls to the drain pan 30 while drawing a parabola, and the water storage space Housed in 33.

<Outline of Embodiment>
This embodiment is summarized as follows.

  In this embodiment, the electrical component holding part 51 and the accommodating part 58B for accommodating the refrigerant pipe are arranged below the blower 13 and the pair of heat exchangers 15. Therefore, it is possible to suppress an increase in the thickness in the front-rear direction and the width in the left-right direction due to the arrangement of the electrical component holding part 51 and the accommodating part 58B. Moreover, since the electrical component case 51 is arranged at a position aligned with the front F with respect to the rear housing portion 58B below the blower 13 and the pair of heat exchangers 15, an increase in height in the vertical direction is as much as possible. It can be kept small. Furthermore, since the electrical component holding part 51 is disposed in front, the operator can easily perform maintenance work of electrical components in front of the indoor unit 11.

  In the present embodiment, since the accommodating portion 58B is a concave portion that is recessed forward from the back surface of the case 20, an operator can easily connect, for example, a refrigerant pipe (connection pipe) used for connection with an outdoor unit to the rear from the concave portion. It can be taken out. Therefore, the efficiency of the connection work with the outdoor unit is improved.

  In the present embodiment, it further includes a drain pan 30 disposed below the pair of heat exchangers 15, the case 20 includes a bottom plate 21, and the electrical component holding unit 51 and the storage unit 58 include the drain pan 30, the bottom plate 21, The lower surface of the drain pan 30 defines an upper portion in the accommodating portion 58, and the upper surface of the bottom plate 21 defines a lower portion in the accommodating portion 58. Therefore, it is not necessary to separately prepare separate members for partitioning the upper part and the lower part of the accommodating part 58. As a result, the number of parts can be reduced, and a space for disposing another member is not necessary, so that further downsizing can be realized.

  In the present embodiment, the electrical component holding unit 51 includes an electrical component case that accommodates the electrical component, and the rear surface of the electrical component case defines a front end in the accommodating portion 58B. Therefore, it is not necessary to separately prepare another member for partitioning the front end portion in the accommodating portion 58B. As a result, the number of parts can be reduced, and a space for disposing another member becomes unnecessary, so that further downsizing can be realized.

  In the present embodiment, the accommodating portion 58B has an opening 61 that opens to the back surface of the case 20, and the drain pan 30 has a bottom 30D that faces the lower portion of the pair of heat exchangers 15, and a rear edge of the bottom 30D. The rear wall 30B stands up at the bottom, and the boundary between the bottom 30D and the rear wall 30B defines the upper edge of the opening 61, and the opening width in the vertical direction of the opening 61 increases toward the rear. And has a curved outer surface. Therefore, the efficiency of the operation of accommodating the refrigerant pipe 57 in the accommodating portion 58B through the opening 61 or the operation of taking out the refrigerant pipe 57 from the accommodating portion 58B is improved.

<Other embodiments>
As mentioned above, although embodiment of this invention was described, this invention is not limited to these embodiment, A various change, improvement, etc. are possible in the range which does not deviate from the meaning.

  For example, in the embodiment, the case where a mixed flow fan is used as the blower 13 is exemplified, but the present invention is not limited to this. As the blower 13, for example, a centrifugal blower such as a turbo fan or a multiblade fan may be used.

  In the embodiment described above, the case where the decorative front plate 25 that can be opened and closed is provided, but the present invention is not limited to this. Such a decorative front plate 25 can be omitted. Further, for example, a grill or the like may be provided in place of the decorative front plate 25.

  In the embodiment, the case where the pair of outlets 25b is provided in the front portion of the case 20 is illustrated, but the present invention is not limited to this. The air outlet 25b may be provided, for example, on the side portion of the case 20, or may be provided on the top portion of the case 20.

  In the embodiment, the case where an aluminum laminated heat exchanger in which multi-hole tubes and corrugated fins are laminated is used as the heat exchanger 15 is exemplified, but the present invention is not limited to this. As the heat exchanger 15, for example, another heat exchanger such as a cross fin heat exchanger may be used.

11 Indoor unit for air conditioner
13 Blower
15 heat exchanger
20 cases
21 Bottom plate
22 Top plate
23 Right side plate
24 Left side plate
25 Front plate
251 Suction port opening / closing plate
252 Air outlet opening / closing plate
25a Suction port
25b outlet
26 Backboard
30 Drain pan
31 Drain pan body
32 Insulation
33 Water storage space
41 Partition member
51 Electrical component storage case
58 containment space
58A Front housing
58B Rear housing

Claims (5)

A blower (13);
A pair of heat exchangers (15) disposed on both sides of the blower (13);
An electrical component holding section (51) for holding electrical components;
A case (20) that houses the blower (13), the electrical component holding part (51), and the pair of heat exchangers (15), and has a pair of outlets (25b) on both sides;
An accommodating portion (58B) for accommodating the refrigerant pipe (57),
The accommodating portion (58B) is provided below the blower (13) and the pair of heat exchangers (15),
The electric component holding part (51) is an indoor unit for an air conditioner, which is disposed at a position aligned forward with respect to the housing part (58B).   The indoor unit for an air conditioner according to claim 1, wherein the housing portion (58B) is a concave portion that is recessed forward from the back surface of the case (20). Further comprising a drain pan (30) disposed below the pair of heat exchangers (15),
The case (20) has a bottom plate (21),
The electrical component holding part (51) and the accommodating part (58B) are located between the drain pan (30) and the bottom plate (21),
The lower surface of the drain pan (30) defines an upper part of the housing part (58B), and an upper surface of the bottom plate (21) defines a lower part of the housing part (58B). 2. The indoor unit for an air conditioner according to 2. The electrical component holding part (51) includes an electrical component case that houses the electrical component,
The indoor unit for an air conditioner according to claim 3, wherein a rear surface of the electrical component case defines a front end portion of the housing portion (58B). The accommodating portion (58B) has an opening (61) that opens to the back of the case (20),
The drain pan (30) includes a bottom part (30D) facing the lower part of the pair of heat exchangers (15), and a rear wall (30B) standing up from a rear edge of the bottom part (30D),
The boundary between the bottom (30D) and the rear wall (30B) defines the upper edge of the opening (61), and the opening width in the vertical direction of the opening (61) increases toward the rear. The indoor unit for an air conditioner according to claim 3 or 4, wherein the indoor unit has an outer surface curved so as to be large.

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