JP2012255611A - Air conditioner indoor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner indoor unit capable of properly guiding dew condensation water produced in a heat exchanger into a water receiving space of a drain pan, while preventing an air flow from a fan from being blown out from an air blowing outlet through the water receiving space of the drain pan without passing through a heat exchanger.SOLUTION: The indoor unit includes: a fan 13; a heat exchanger 15 arranged on the side of the fan 13; the drain pan 30 arranged below the fan 13 and the heat exchanger 15, and having the water receiving space for receiving water and provided in the range over the fan 13 and the heat exchanger 15 thereon; and a case. The water receiving space of the drain pan 30 includes: an upstream side space positioned on the upstream side of an air flowing direction to the heat exchanger 15; and a downstream side space positioned on the downstream side of the air flowing direction to the heat exchanger 15. The upper part of the upstream side space is closed, and that of the downstream side is opened.

Description

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

  For example, Patent Document 1 proposes an indoor unit that is reduced in thickness by arranging heat exchangers on both sides of a turbofan. 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 this indoor unit, in order to prevent the airflow from the turbofan from being blown from the outlet through the water storage space of the drain pan without passing through the heat exchanger, the space between the turbofan and the heat exchanger and the drain pan is not It is partitioned off by a partition plate (see FIG. 12 of Patent Document 1).

JP 2009-139078 A

  Incidentally, in the indoor unit disclosed in FIG. 12 of Patent Document 1, the partition plate is provided so as to be bridged between the left and right side walls of the drain pan, and the heat exchanger is disposed above the partition plate. . That is, Patent Document 1 discloses a configuration in which a partition plate is interposed between the water storage space of the drain pan and the heat exchanger. However, Patent Document 1 does not consider how the condensed water generated in the heat exchanger is specifically led to the water storage space of the drain pan.

  Therefore, the present invention has been made in view of such a point, and the object of the present invention is that the airflow from the blower is blown out from the outlet through the water storage space of the drain pan without passing through the heat exchanger. It is an object of the present invention to provide an indoor unit for an air conditioner capable of appropriately guiding condensed water generated in a heat exchanger to a water storage space of a drain pan.

  (1) The indoor unit for an air conditioner of the present invention is disposed on the side of the blower (13) and the blower (13), and is located on the downstream side of the blower (13) in the air flow direction. A water storage space (33) that is disposed below the exchanger (15), the blower (13), and the heat exchanger (15) and stores water is the blower (13) and the heat exchanger (15). A drain pan (30) provided in a span, and the blower (13), the heat exchanger (15) and the drain pan (30) are housed, and the heat exchanger (15) from the blower (13) And a case (20) having an air outlet (25b) that is blown out after the air sent to the air passes through the heat exchanger (15). The water storage space (33) of the drain pan (30) includes an upstream space (331) located upstream of the heat exchanger (15) in the air flow direction, and the heat exchanger (15). On the other hand, it includes a downstream space (333) located on the downstream side in the air flow direction. The upper part of the upstream space (331) is closed, and the upper part of the downstream space (333) is open.

  In this configuration, the upper part of the upstream space (331) located upstream of the heat exchanger (15) in the air flow direction is blocked, so that the airflow from the blower can pass through the heat exchanger. Without being blown out from the outlet through the water storage space of the drain pan, it is possible to suppress (suppress airflow from detouring). On the other hand, since the upper part of the downstream space (333) located on the downstream side with respect to the heat exchanger (15) is open, the heat exchanger (15) by the airflow passing through the heat exchanger (15) The dew condensation water that scatters to the downstream side can be appropriately guided to the downstream space (333) through the upper opening.

  (2) In the indoor unit for an air conditioner, a partition member that partitions an upstream space (331) of the drain pan (30) and an air flow path from the blower (13) to the heat exchanger (15) ( 41), and the upper part of the upstream space (331) can be exemplified by the partition member (41).

  In this configuration, it is possible to suppress the air flow from bypassing the air flow path and the upstream space (331) by simply arranging the partition member (41) above the upstream space (331).

  (3) In the configuration of (2), the heat exchanger (15) is provided below the heat exchange region (151) in which air and refrigerant exchange heat and the heat exchange region (151). It is preferable that the header portion (152) is disposed below the partition member (41).

  In this configuration, when the header portion (152) that does not directly contribute to heat exchange is disposed below the partition member (41), the header portion (152) is disposed above the partition member (41). In comparison, since the vertical length of the heat exchange region (151) can be increased above the partition member (41), the efficiency of heat exchange can be improved.

  (4) In the configuration of (3), the heat exchanger (15) includes a metal pipe (16) through which refrigerant flows and fins (17), and the heat exchange region (151) and the header section (152), between the fin (17) and the metal tube (16) has a metal tube region (154) provided with only the metal tube (16), the metal tube region (154 ) And the header portion (152) may be disposed below the partition member (41).

  In this configuration, not only the header portion (152) but also the metal tube region (154) that contributes little to heat exchange is disposed below the partition member (41), so that heat exchange is performed above the partition member (41). Since the vertical length of the region (151) can be increased, the efficiency of heat exchange can be improved.

  (5) In the indoor unit for an air conditioner, the air conditioner is disposed on a side opposite to the heat exchanger (15) with respect to the blower (13), and has a more air flow direction than the blower (13). A second heat exchanger (15) located on the downstream side is further provided, and the water storage space (33) of the drain pan (30) spans the heat exchanger (15) and the second heat exchanger (15). The case (20) is disposed in a range after the air sent from the blower (13) to the second heat exchanger (15) passes through the second heat exchanger (15). (20) has a second outlet (25b) blown out from the drain pan (30), and the water storage space (33) of the drain pan (30) is in the air flow direction with respect to the second heat exchanger (15). It further includes a second downstream space (333) located on the downstream side, the upper portion of the second downstream space (333) is open, and the upstream space (331) is formed by the heat exchanger (15). Air flow against It is located upstream of the second heat exchanger (15) and upstream of the air flow direction with respect to the second heat exchanger (15), and the upper part of the upstream space (331) is blocked. preferable.

  (6) In the configuration of (5), the water storage space (33) of the drain pan (30) extends from the end on the heat exchanger (15) side to the end on the second heat exchanger (15) side. It is preferable to communicate with each other.

  In this configuration, for example, the refrigerant pipes (152a, 152b) that connect the two heat exchangers can be arranged in the water accommodation space (33). Moreover, it is only necessary to provide one discharge means (drain port or drain hose) for discharging the water (condensation water) stored in the water storage space (33) from the drain pan (30).

  According to the present invention, the condensed air generated in the heat exchanger is removed from the air blower while suppressing the airflow from the blower from being blown from the air outlet through the water storage space of the drain pan without passing through the heat exchanger. It can be appropriately guided to the water accommodation space.

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 perspective view which shows the internal structure of the said indoor unit for air conditioners. (A) is a schematic front view which shows the internal structure of the said indoor unit for air conditioners, (B) is a schematic front view which shows the internal structure of the indoor unit for air conditioners of a reference example.

  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 below and a case 20 for housing these 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.

  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, and a lower end portion thereof is positioned in a drain pan 30 described later, and an upper end portion thereof is close to or in contact with 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.

  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).

  As shown in FIGS. 7 and 8A, 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 right side space 331. It includes a right downstream space 332 positioned downstream of the air flow with respect to the heat exchanger 15 and a left downstream space 333 positioned downstream of the air flow with respect to the left heat exchanger 15.

  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. 8A, the water storage space 33 includes a heat exchanger arrangement space 334 that is a space between the upstream space 331 and the right downstream space 332, and the upstream space 331 and the left downstream space. And a heat exchanger arrangement space 335, which is a space between 333 and 333. 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.

  In the present embodiment, the state in which the upper portion of the upstream space 331 is blocked means that the space above the partition member 41 (the air flow path from the blower 13 to each heat exchanger 15) and the partition member 41 below. This includes not only the case where the D space (upstream side space 331) is partitioned by the partition member 41 without any gaps, but also the case where some gaps are provided. Specifically, for example, in the present embodiment shown in FIG. 4, small gaps 62 are provided at the corners surrounded by the inner part of each heat exchanger 15 and the back plate 26. A partition member 41 is disposed in most of the region between the inner side of the right heat exchanger 15 and the inner side of the left heat exchanger 15. Thereby, in this embodiment, the malfunction which the air flow as shown with a dashed-two dotted line in FIG. 7 arises, ie, the air from the air blower 13 does not pass the heat exchanger 15, but the water storage space 33 of the drain pan 30 is used. It is possible to effectively suppress a problem that the air is blown into the room from the air outlet 25b of the case 20 through the room.

  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 8A, the lower header portion 152 and the metal pipe region 154 of each heat exchanger 15 and the refrigerant pipes 152a and 152b connecting the heat exchangers 15 are more than the partition member 41. The water storage space 33 of the drain pan 30 is located below. As shown in FIG. 8A, 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. The refrigerant pipes 152a and 152b that connect the heat exchangers 15 can be arranged 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.

  On the other hand, as shown in FIG. 8B, the partition member 71 is arranged in the drain pan 30 in the vertical direction to partition the upstream space 331 and the right downstream space 332, and to separate another partition member 71 in the drain pan 30. By separating the upstream space 331 and the left downstream space 333 by arranging them vertically, the case where the air from the blower 13 passes through the water storage space 33 of the drain pan 30 without passing through the heat exchanger 15. The problem of being blown into the room from the 20 outlets 25b can be suppressed. However, in this case, since the pair of partition members 71 and 71 are in the way, it is difficult to arrange the refrigerant pipes 152a and 152b that connect the heat exchangers 15 in the water accommodation space 33. Moreover, since the water (condensation water) W stored in the water storage space 33 is divided and stored in two places, at least two discharge means (not shown) for discharging the water W from the drain pan 30 are necessary. become.

  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.

  In the present embodiment, in the direction of the airflow flowing downstream of each heat exchanger 15, the opening length of the upper part of each downstream space (the right downstream space 332, the left downstream space 333) is set to the velocity of the airflow. It is adjusted accordingly. Specifically, it is as follows.

  When the blower 13 is a centrifugal blower or a mixed flow blower, the velocity of the air flowing out from the impeller 131 tends to be larger in the airflow flowing in the region closer to the rear B. In particular, when the blower 13 is a mixed flow blower, the air flows obliquely backward from the impeller 131, so that the speed of the airflow passing through the heat exchanger 15 is closer to the rear B than the airflow F3 closer to the front F. The airflow F1 is larger. That is, when the speeds of the airflow F1, the airflow F2, and the airflow F3 are compared, the speed of the airflow F1 is the highest and the speed of the airflow F3 is the lowest. Therefore, the scattering distance of the condensed water scattered by the airflow F1 near the rear B is larger than the scattering distance of the condensed water scattered by the airflow F3 near the front F.

  In the right heat exchanger 15, the outer portion (right surface portion 15R) of the heat exchanger 15 is inclined with respect to the front wall 30F of the drain pan 30, and the distance (opening length) between the outer portion and the front wall 30F in the airflow direction. Is gradually increased toward the rear B. The same applies to the left heat exchanger 15. Thereby, even if there is a variation in the speed of the airflow passing through the heat exchanger 15, the scattered condensed water can be appropriately guided to the water accommodation space 33 of the drain pan 30.

  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 accommodating space 58 includes a front accommodating portion 58A that accommodates the electrical component case 51, and a rear accommodating portion 58B that is arranged behind the front accommodating portion 58A and accommodates the drain hose 56 and the refrigerant pipe 57. Examples of the refrigerant pipe 57 include a refrigerant communication pipe that connects the indoor unit 11 and an unillustrated outdoor unit. An electrical component is accommodated in the electrical component case 51. At the time of maintenance or the like, the operator opens the lower front plate 29 of the case 20 and sets electrical components.

  The rear housing portion 58B is a concave portion that is recessed forward F from the back plate 26, and the drain hose 56, the refrigerant pipe 57, and the like can be taken out from the opening 61 as necessary. A back surface 51B of the electrical component case 51 defines a front side end of the rear housing 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.

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

  In the present embodiment, since the upper part of the upstream space 331 located upstream in the air flow direction with respect to the heat exchanger 15 is blocked, the air flow from the blower does not pass through the heat exchanger and the drain pan. It is possible to suppress blowing out of the outlet through the water storage space (suppressing the detour of the airflow). On the other hand, since the upper portion of the downstream space 333 located on the downstream side with respect to the heat exchanger 15 is open, the dew condensation water that is scattered downstream from the heat exchanger 15 by the airflow passing through the heat exchanger 15 Can be appropriately guided to the downstream space 333 through the upper opening.

  Further, in this embodiment, the air flow is bypassed by partitioning the air flow path from the blower 13 to the heat exchanger 15 and the upstream space 331 only by arranging the partition member 41 at the upper part of the upstream space 331. Can be suppressed.

  Further, in this embodiment, the header member 152 that does not directly contribute to the heat exchange is disposed below the partition member 41, so that the partition member is compared with the case where the header portion 152 is disposed above the partition member 41. Since the vertical length of the heat exchange region 151 can be increased above 41, the efficiency of heat exchange can be improved.

  Further, in the present embodiment, not only the header portion 152 but also the metal tube region 154 having a small contribution to heat exchange is disposed below the partition member 41, so that the heat exchange region 151 is above and below the partition member 41. Therefore, the efficiency of heat exchange can be improved.

  In the present embodiment, the water storage space 33 of the drain pan 30 communicates from the end on the heat exchanger 15 side to the end on the second heat exchanger 15 side. The connecting refrigerant pipes 152a and 152b can be arranged in the water accommodation space 33. In addition, it is only necessary to provide one discharge means (drain port or drain hose) for discharging the water (condensation water) stored in the water storage space 33 from the drain pan 30.

<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 the pair of heat exchangers 15 are provided on both sides of the blower 13 is exemplified, but the present invention is not limited to this. The form with which the single heat exchanger is arrange | positioned at the side of the air blower 13 may be sufficient.

  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.

  In the above embodiment, the case where the partition member 41 that partitions the upstream space 331 of the drain pan 30 and the air flow path from the blower 13 to the heat exchanger 15 is provided as a means for closing the upper portion of the upstream space 331 is illustrated. However, the present invention is not limited to this. Not only when a member formed separately from the drain pan main body 31 and the case 20 is used, such as the partition member 41, but the part that closes the upper portion of the upstream space 331 may be integrally formed with the drain pan or the case, for example. Good.

  In the embodiment, the case where the header portion 152 is provided below the heat exchange region 151 and the header portion 152 is disposed below the partition member 41 is illustrated, but the present invention is not limited to this. For example, the entire heat exchanger 15 may be disposed above the partition member 41.

11 Indoor unit for air conditioner
13 Blower
15 heat exchanger
151 Heat exchange area
152 Header
154 Metal tube area
16 Metal pipe
17 fins
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
331 Upstream space
332 Right downstream space
333 Left downstream space
41 Partition member
51 Electrical component storage case

Claims (6)

A blower (13);
A heat exchanger (15) disposed on the side of the blower (13) and located on the downstream side in the air flow direction from the blower (13);
Located below the blower (13) and the heat exchanger (15), a water accommodation space (33) for containing water is provided in a range spanning the blower (13) and the heat exchanger (15). Drain pan (30),
The blower (13), the heat exchanger (15), and the drain pan (30) are accommodated, and air sent from the blower (13) to the heat exchanger (15) passes through the heat exchanger (15). A case (20) having an outlet (25b) to be blown out after passing,
The water storage space (33) of the drain pan (30) includes an upstream space (331) located upstream of the heat exchanger (15) in the air flow direction, and the heat exchanger (15). And a downstream space (333) located on the downstream side in the air flow direction,
An air conditioner indoor unit in which the upper part of the upstream space (331) is closed and the upper part of the downstream space (333) is open. A partition member (41) that partitions the upstream space (331) of the drain pan (30) and the air flow path from the blower (13) to the heat exchanger (15);
The indoor unit for an air conditioner according to claim 1, wherein an upper portion of the upstream space (331) is closed by the partition member (41). The heat exchanger (15) includes a heat exchange region (151) in which air and refrigerant exchange heat, and a header portion (152) provided below the heat exchange region (151),
The indoor unit for an air conditioner according to claim 2, wherein the header (152) is disposed below the partition member (41). The heat exchanger (15)
A metal pipe (16) through which refrigerant flows, and fins (17),
Between the heat exchange region (151) and the header portion (152), a metal tube region (154) in which only the metal tube (16) of the fin (17) and the metal tube (16) is provided. )
The indoor unit for an air conditioner according to claim 3, wherein the metal pipe region (154) and the header portion (152) are disposed below the partition member (41). A second heat exchanger (15) which is disposed on the side opposite to the heat exchanger (15) with respect to the blower (13) and is located on the downstream side in the air flow direction with respect to the blower (13). )
The water storage space (33) of the drain pan (30) is provided in a range spanning the heat exchanger (15) and the second heat exchanger (15),
The case (20) is blown out from the case (20) after the air sent from the blower (13) to the second heat exchanger (15) passes through the second heat exchanger (15). A second outlet (25b)
The water storage space (33) of the drain pan (30) further includes a second downstream space (333) located downstream in the air flow direction with respect to the second heat exchanger (15). 2 The upper part of the downstream space (333) is open,
The upstream space (331) is located upstream of the heat exchanger (15) in the air flow direction, and upstream of the second heat exchanger (15) in the air flow direction. The indoor unit for an air conditioner according to any one of claims 1 to 4, wherein the air conditioner indoor unit is located in the upper space (331).   The water storage space (33) of the drain pan (30) communicates from an end on the heat exchanger (15) side to an end on the second heat exchanger (15) side. Indoor unit for air conditioner.

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