JPWO2016084216A1 - Air conditioner indoor unit - Google Patents

Abstract

The objective of this invention is providing the indoor unit of the air conditioner which can prevent the increase in the noise by the flow of the air discharged from a centrifugal fan interfering with a drain pan. An indoor unit suction port 3 for sucking indoor air into the machine, a centrifugal blower 5 for discharging air sucked from the indoor unit suction port 3 to the surroundings, a heat exchanger 8 provided on the discharge side of the centrifugal blower 5, and heat An air outlet 12 provided on the downstream side of the exchanger 8 and a drain pan 9 provided at the lower portion of the heat exchanger 8 for receiving condensed water, the lower end of the discharge port 7b of the centrifugal blower 5 being the heat of the drain pan 9 In the indoor unit of the air conditioner provided at a position higher than the upper end 23 a of the wall surface portion 23 positioned on the upstream side with respect to the exchanger 8, the drain pan 9 is a wall surface positioned on the upstream side with respect to the heat exchanger 8. The upper end 23 a of the portion 23 is formed lower than the upper end 22 a of the wall surface portion 22 located on the downstream side with respect to the heat exchanger 8.

Description

  The present invention uses a centrifugal blower provided in a housing to suck in air from the room, cools or heats the air through a heat exchanger provided on the blowout side of the centrifugal blower, and then blows out toward the room. The present invention relates to an indoor unit of an air conditioner.

  An air conditioner includes a compressor that compresses a refrigerant in a refrigerant circulation channel in which the refrigerant is sealed, an indoor heat exchanger that exchanges heat between the refrigerant and indoor air, an expansion valve that decompresses the refrigerant, a refrigerant, It has a refrigeration cycle in which outdoor heat exchangers that exchange heat with the outside air are sequentially arranged. Among these, the outdoor heat exchanger is stored in the casing of the outdoor unit together with a blower that sends air to the outdoor heat exchanger, and the indoor heat exchanger is placed in the casing of the indoor unit together with a blower that sends indoor air to the indoor heat exchanger. Stored.

  There are various types of indoor units depending on the installation location, but in recent years, especially in the field of business use, the housing is embedded in the ceiling, and air is sucked in through a decorative panel installed on the ceiling surface. The so-called ceiling-embedded cassette type that blows out is the mainstream.

  As an indoor unit of a ceiling embedded cassette type, an indoor unit of an air conditioner described in Japanese Patent Laid-Open No. 2002-139230 (Patent Document 1) is known. Patent Document 1 aims to provide an indoor unit that can achieve a reduction in energy consumption, noise reduction, and downsizing by making the wind speed distribution passing through the heat exchanger uniform and sufficiently extracting the performance of the heat exchanger. In an indoor unit of an air conditioner having a mouth and a blower outlet and having a heat exchanger arranged around the blower, a configuration is disclosed in which a vane for static pressure recovery is provided on the unit intake port side on the windward side of the heat exchanger (See summary).

  Moreover, in the indoor unit of Patent Document 1, a heat exchanger is arranged so as to surround the periphery of the centrifugal blower, and after the air discharged from the centrifugal fan of the centrifugal blower is heat-exchanged by the heat exchanger, Is blown out. In such a structure, a drain pan for receiving water droplets attached to the heat exchanger is installed at the lower part of the heat exchanger (see paragraph 0021 and FIG. 1).

JP 2002-139230 A

  In an indoor unit of an air conditioner, it is important to reduce noise from the viewpoint of comfort. For example, in Patent Document 1, noise reduction is achieved by providing a vane for static pressure recovery on the windward unit suction port side of the heat exchanger.

  By the way, in an indoor unit of an air conditioner having such a structure, it is effective to increase the diameter of the centrifugal fan in order to reduce noise. However, when the centrifugal fan is enlarged in a similar shape, the distance between the discharge port of the centrifugal fan and the drain pan approaches. If the distance between the discharge port of the centrifugal fan and the drain pan is too close, the air flow interferes with the drain pan and noise increases. For this reason, although the diameter of the centrifugal fan was increased, there was a problem that noise could not be reduced sufficiently.

  The objective of this invention is providing the indoor unit of the air conditioner which can prevent the increase in the noise by the flow of the air discharged from a centrifugal fan interfering with a drain pan.

In order to achieve the above object, an indoor unit of an air conditioner of the present invention includes an indoor unit suction port that sucks indoor air into the device, a centrifugal blower that discharges air sucked from the indoor unit suction port, and A heat exchanger that cools or heats the air provided on the discharge side of the centrifugal blower, an outlet that blows out air provided on the downstream side of the heat exchanger, and a heat exchanger that is provided at the bottom of the heat exchanger. A drain pan that receives the generated condensed water, and the drain pan has a wall surface portion that rises upward from an end portion located on the upstream side and an end portion located on the downstream side with respect to the heat exchanger, and the centrifugal blower In the indoor unit of the air conditioner provided at a position higher than the upper end of the wall surface portion, the lower end of the discharge port is located upstream of the heat exchanger of the drain pan,
The drain pan is formed such that an upper end of the wall surface portion positioned on the upstream side with respect to the heat exchanger is lower than an upper end of the wall surface portion positioned on the downstream side with respect to the heat exchanger.

  According to the present invention, air is sucked from the room through the centrifugal fan provided in the housing, and after cooling or heating the air through the heat exchanger provided on the blowout side of the centrifugal fan, the air is directed indoors. In the indoor unit of the air conditioner that blows out, it is possible to suppress an increase in noise caused by the flow of air discharged from the centrifugal blower interfering with the drain pan disposed at the lower part of the heat exchanger.

  Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

Sectional drawing which shows the indoor unit of the air conditioner of 1st Example which concerns on this invention. Sectional drawing which shows the indoor unit of the air conditioner of 2nd Example which concerns on this invention. Sectional drawing which shows the indoor unit of the air conditioner of the 3rd Example which concerns on this invention. Sectional drawing which shows the indoor unit of the air conditioner of the 4th Example which concerns on this invention. Sectional drawing which shows the indoor unit of the air conditioner in the comparative example with this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  A first embodiment according to the present invention will be described below with reference to FIG. FIG. 1 is a cross-sectional view showing an indoor unit of an air conditioner according to a first embodiment of the present invention. In the following description, including the other examples, “upstream side” and “downstream side” represent “upstream side” and “downstream side” in the air flow direction (airflow direction).

  This indoor unit 100 </ b> A includes a decorative panel 1 and a housing 2 connected to the decorative panel 1. Here, the decorative panel 1 is provided with a suction grill (indoor unit suction port) 3 at the center, and an outlet (indoor unit outlet) 12 provided with a wind direction plate 4 is disposed around it. A centrifugal blower 5 including a motor 6 and a centrifugal fan 7 connected to a shaft of the motor 6 is installed in the housing 2. When the motor 6 is operated, the centrifugal fan 7 is rotated, and as indicated by an arrow 15 in FIG. 1, the indoor air flows through the suction grill 3, the filter 16 installed in the suction grill 3, and the bell installed in the housing 2. It is sucked into the suction port 7 a of the centrifugal fan 7 through the mouse 10 and discharged from the discharge port 7 b of the centrifugal fan 7 as indicated by an arrow 18.

  An indoor heat exchanger 8 is disposed so as to surround the centrifugal blower 5, and the air discharged from the centrifugal fan 7 is heat-exchanged by the indoor heat exchanger 8, and then the air outlet 12 as indicated by an arrow 17. It is blown out more indoors. A drain pan 9 for receiving condensed water generated in the indoor heat exchanger 8 at the time of cooling is installed below the indoor heat exchanger 8.

  The suction grill 3 can be detached from the decorative panel 1 together with the filter 16, and the filter 16 can be easily cleaned. On the lower surface of the bell mouth 10, an electrical component box 11 that houses a control board (not shown) for controlling the operation of the indoor unit 100A is installed. In such a structure, maintenance of the electrical component box 11 can be performed by opening the suction grill 13. Thereby, the maintenance of the electrical component box 11 becomes easy. The bell mouth 10 is attached to the inner periphery of the drain pan 9 from below. Accordingly, maintenance such as replacement of the centrifugal fan 7 and the motor 6 can be easily performed by opening the suction grill 3 and removing the bell mouth 10.

  In the present embodiment, the centrifugal blower 5, the indoor heat exchanger 8, the drain pan 9, the bell mouth 10, the electrical component box 11, and the filter 16 are in a space surrounded by the casing 2 and the decorative panel 1 (of the casing 2. (Inside).

  Here, the drain pan 9 has a shape in which a wall surface (wall surface portion) 22 and a wall surface (wall surface portion) 23 rise upward from a bottom surface (bottom surface portion) 21 on which the heat exchanger 8 is placed. The wall surface 22 is a wall surface located on the downstream side with respect to the heat exchanger 8 in the air flow direction, and constitutes a wall surface on the outer peripheral side of the drain pan 9. The wall surface 23 is a wall surface located on the upstream side with respect to the heat exchanger 8 in the air flow direction, and constitutes a wall surface on the inner peripheral side of the drain pan 9.

  In this embodiment, the upper end (upper edge portion) 23a of the wall surface 23 located on the upstream side of the heat exchanger 8 is lower than the upper end (upper edge portion) 22a of the wall surface 22 located on the downstream side of the heat exchanger 8 ( The upper end 23 a of the wall surface 23 located on the upstream side of the heat exchanger 8 is located below (lower position) than the lower end of the discharge port 7 b of the centrifugal fan 7. In the present embodiment, the upper end 23a of the wall surface 23 and the upper end 22a of the wall surface 22 are separated by a distance h1 in the height direction. Further, the lower end of the discharge port 7b of the centrifugal fan 7 and the upper end 23a of the wall surface 23 are separated by a distance h2 in the height direction.

  Here, the comparative example with a present Example is demonstrated using FIG. FIG. 5 is a cross-sectional view showing an indoor unit of an air conditioner in a comparative example with the present invention. Parts that are the same as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted.

  In the indoor unit 100E in the comparative example of FIG. 5, the shape of the drain pan 109 is different compared to the indoor unit 100A of FIG. Further, since the shape of the drain pan 109 is different, the shape (the dimension in the height direction) of the bell mouth 110 is different from the indoor unit 100A of FIG.

  In the drain pan 109, the upper end (upper edge portion) 123 a of the wall surface 123 positioned on the upstream side of the heat exchanger 8 is higher (higher) than the upper end (upper edge portion) 122 a of the wall surface 122 positioned on the downstream side of the heat exchanger 8. Position). Further, the upper end 123 a of the wall surface 123 is located below the lower end of the discharge port 7 b of the centrifugal fan 7. In this comparative example, the upper end 123a of the wall surface 123 is positioned above the upper end 122a of the wall surface 122 by h3 in the height direction. At this time, if the height position of the upper end 122a of the wall surface 122 is the same as the height position of the upper end 22a of the wall surface 22 in the indoor unit 100A of FIG. 1, the height position of the upper end 123a of the wall surface 123 is the first implementation. Compared with the height position of the upper end 23a of the wall surface 23 in the example, it becomes higher by (h1 + h3). A distance h4 in the height direction between the lower end of the discharge port 7b of the centrifugal fan 7 and the upper end 123a of the wall surface 123 is a length of (h2− (h1 + h3)). That is, in the indoor unit 100E in the comparative example, the distance in the height direction between the lower end of the discharge port 7b of the centrifugal fan 7 and the upper end 123a of the wall surface 123 is shorter by (h1 + h3) than the indoor unit 100A in FIG. . In the indoor unit 100E, the height direction dimension of the bell mouth 110 is reduced by the short distance in the height direction between the lower end of the discharge port 7b of the centrifugal fan 7 and the upper end 123a of the wall surface 123.

  In the present embodiment, the upper end 23a of the wall surface 23 located on the upstream side of the heat exchanger 8 is positioned below the upper end 22a of the wall surface 22 located on the downstream side of the heat exchanger 8, so that the diameter of the centrifugal fan 7 is increased. The distance between the discharge port 7b and the drain pan 9 (particularly, the distance in the height direction from the upper end 23a of the wall surface 23) can be increased even when the value is increased. Thereby, interference with the flow (airflow) of the air discharged from the discharge port 7b and the drain pan 9 can be reduced. And the increase in the noise which arises when the drain pan 9 and the discharge port 7b of the centrifugal fan 7 approach can be suppressed.

  Next, a second embodiment according to the present invention will be described with reference to FIG. Parts that are the same as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted. FIG. 2 is a cross-sectional view showing an indoor unit 100B of an air conditioner according to a second embodiment of the present invention.

  This embodiment is different from the first embodiment in that a dug portion 34 dug further downward from the bottom surface 31 is provided on the upstream side of the heat exchanger 8 on the bottom surface 31 of the drain pan 30. .

  The electrical component box 35 is provided outside the housing 2. Since the electrical component box 35 is provided outside the housing 2, the shape of the bell mouth 36 is different from that of the first embodiment. In this embodiment, the centrifugal blower 5, the indoor heat exchanger 8, the drain pan 9, the bell mouth 10, and the filter 16 are arranged in a space surrounded by the casing 2 and the decorative panel 1 (inside the casing 2). The electrical component box 35 is disposed outside the housing 2.

  Also in the present embodiment, as in the first embodiment, the upper end (upper edge portion) 33a of the wall surface 33 located on the upstream side of the heat exchanger 8 is the upper end of the wall surface 32 located on the downstream side of the heat exchanger 8. The upper end 33a of the wall surface 33 located on the lower side (lower position) of the (upper edge) 32a and located on the upstream side of the heat exchanger 8 is lower (lower position) than the lower end of the discharge port 7b of the centrifugal fan 7. ). The upper end 33a of the wall surface 33 and the upper end 32a of the wall surface 32 are separated by a distance h1 in the height direction. Further, the lower end of the discharge port 7b of the centrifugal fan 7 and the upper end 33a of the wall surface 33 are separated by a distance h2 in the height direction.

  If the height of the wall surface 33 located on the upstream side of the heat exchanger 8 is reduced, the amount of condensed water that can be stored in the drain pan 30 is reduced. Therefore, in the present embodiment, the digging portion 34 is provided on the upstream side of the heat exchanger 8 of the drain pan 30 to ensure the water retention amount of the drain pan 30. Moreover, since the downstream side of the heat exchanger 8 of the drain pan 30 constitutes an air blowing channel, it is difficult to provide a dug portion. However, since the upstream side of the heat exchanger 8 is a dead water area of the fan suction port, even if the digging portion 34 is provided, the air flow is not adversely affected. Further, by arranging the electrical component box 35 outside the housing 2, it is possible to provide the digging portion 34 in the portion where the electrical component box 11 is provided in the first embodiment, thereby further securing the water retention amount. can do.

  Although the amount of water retention is reduced, the digging portion has a part of the drain pan as shown in the first embodiment, and an electrical component box 11 is provided in this portion as in the first embodiment, and the grill It is also possible to adopt a structure that allows maintenance of the electrical component box 11 by removing. Furthermore, it is possible to provide a part or all of the dug portion 34 on the downstream side of the heat exchanger 8 by devising such as increasing the size of the product. Further, in the indoor unit of the air conditioner having such a structure, a drain pump 37 for discharging condensed water to the outside of the machine is provided, and the suction port 37a of the drain pump 37 is located at the same height as the digging portion 34. Thus, opening the suction port 37a of the drain pump 37 inside the digging portion 34 is desirable for efficient drain water discharge. The drain pump 37 may be provided in the first embodiment described above, or in a third embodiment and a fourth embodiment described later. When the drain pump 37 is provided in the third and fourth embodiments, the suction port 37a of the drain pump 37 is opened inside the dug portions 44 and 54 as in the present embodiment. Is desirable. The condensed water pumped up by the drain pump 37 is discharged out of the machine through the drain pipe 37b.

  Next, a third embodiment according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the part with the same structure as above-mentioned FIG. 1 and FIG. FIG. 3 is a cross-sectional view showing an indoor unit 100C of an air conditioner according to a third embodiment of the present invention.

  In the present embodiment, the centrifugal blower 5, the indoor heat exchanger 8, the drain pan 40, the bell mouth 45, and the filter 16 are disposed in a space surrounded by the casing 2 and the decorative panel 1 (inside the casing 2). The electrical component box 35 is disposed outside the housing 2. The electrical component box 35 may be disposed inside the housing 2 as in the first embodiment.

  The present embodiment is different from the first and second embodiments in that the upper end 43a of the wall surface 43 located on the upstream side of the heat exchanger 8 of the drain pan 40 is lower (lower than the lower end of the heat exchanger 8). Position).

  In this embodiment, the upper end (upper edge portion) 43a of the wall surface 43 located on the upstream side of the heat exchanger 8 is lower than the upper end (upper edge portion) 42a of the wall surface 42 located on the downstream side of the heat exchanger 8. The upper end 43a of the wall surface 43 located at the (low position) and upstream of the heat exchanger 8 is located below (lower position) than the lower end of the discharge port 7b of the centrifugal fan 7. The upper end 43a of the wall surface 43 and the upper end 42a of the wall surface 42 are separated by a distance h5 in the height direction. Further, the lower end of the discharge port 7b of the centrifugal fan 7 and the upper end 43a of the wall surface 43 are separated by a distance h6 in the height direction. H5 and H6 in this embodiment are in a relationship of h5> h1 and h6> h2 with respect to h1 and h2 in the first embodiment. Moreover, the upper end 43a of the wall surface 43 and the lower end of the heat exchanger 8 are separated by a distance h7 in the height direction.

  Usually, the wall 43 on the upstream side of the heat exchanger 8 of the drain pan 40 is disposed so as to block the heat exchanger 8, so that the flow of air flowing into the heat exchanger 8 is hindered and becomes a ventilation resistance. End up. Therefore, in the present embodiment, the upstream wall surface 43 of the heat exchanger 8 is configured not to block the heat exchanger 8, thereby preventing ventilation resistance.

  Further, similarly to the second embodiment, a heat exchanging portion 44 that is dug further downward from the bottom surface 41 is provided on the upstream side of the heat exchanger 8 on the bottom surface 41 of the drain pan 40. Condensed water can be retained even if the upstream wall 43 is lowered.

  In the present embodiment, since the upstream end of the bell mouth 45 is fixed to the upper end 43a of the wall surface 43, the height of the bell mouth 45 is higher than that of the first and second embodiments. Is also getting bigger.

  Next, a fourth embodiment according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the part with the same structure as above-mentioned FIG. 1 thru | or FIG. 3, and description is abbreviate | omitted. FIG. 4 is a cross-sectional view showing an indoor unit 100D of an air conditioner according to a fourth embodiment of the present invention.

  In the present embodiment, the centrifugal fan 5, the indoor heat exchanger 58, the drain pan 50, the bell mouth 45, and the filter 16 are arranged in a space surrounded by the casing 2 and the decorative panel 1 (inside the casing 2). The electrical component box 35 is disposed outside the housing 2. The electrical component box 35 may be disposed inside the housing 2 as in the first embodiment.

  This embodiment differs from the third embodiment in that the distance d1 in the horizontal direction between the wall surface 52 and the heat exchanger 58 on the downstream side with respect to the heat exchanger 8 of the drain pan 50 is different from that of the heat exchanger 8. In other words, the distance between the upstream wall surface 53 and the heat exchanger 58 is greater than the distance d2 in the horizontal direction.

  The wall surface 52 on the downstream side of the heat exchanger 8 of the drain pan 50 retains the dew condensation water generated in the heat exchanger 8 and has a function of preventing the dew condensation generated in the heat exchanger 8 from jumping out to the outside by air blowing. . In the present embodiment, the dew condensation water is retained in the dug portion 54 provided on the upstream side with respect to the heat exchanger 8 and the distance d1 between the heat exchanger 58 and the wall surface 52 on the downstream side of the heat exchanger 8 is increased. For this reason, even if the height of the wall surface 52 on the downstream side of the heat exchanger 8 is lowered, it is possible to prevent the condensation generated in the heat exchanger 58 from blowing out to the outside due to the blowing. Further, by lowering the wall surface 52 on the downstream side of the heat exchanger 8, the air blown out from the heat exchanger 58 is not obstructed by the wall surface 52 on the downstream side of the heat exchanger 8, and the ventilation resistance can be reduced. .

  The positional relationship in the height direction between the wall surfaces 52 and 53 of the present embodiment and the discharge port 7b of the centrifugal fan 7 is configured as follows. The upper end (upper edge portion) 53a of the wall surface 43 located on the upstream side of the heat exchanger 58 is positioned lower (lower position) than the upper end (upper edge portion) 52a of the wall surface 52 located on the downstream side of the heat exchanger 58. In addition, the upper end 53a of the wall surface 53 located on the upstream side of the heat exchanger 58 is located below (lower position) than the lower end of the discharge port 7b of the centrifugal fan 7. The upper end 53a of the wall surface 53 and the upper end 52a of the wall surface 52 are separated by a distance h8 in the height direction. Further, the lower end of the discharge port 7b of the centrifugal fan 7 and the upper end 53a of the wall surface 53 are separated by a distance h6 in the height direction. Moreover, the upper end 53a of the wall surface 53 and the lower end of the heat exchanger 58 are separated by a distance h7 in the height direction. That is, the distance in the height direction between the lower end of the discharge port 7b of the centrifugal fan 7 and the upper end 53a of the wall surface 53 is the same as that of the third embodiment. The distance in the height direction between the upper end 53a of the wall surface 53 and the lower end of the heat exchanger 58 is also the same as that of the third embodiment.

  The horizontal distance relationship among the wall surface 52, the heat exchanger 58, and the wall surface 53 described in the present embodiment is also applicable to the first embodiment and the second embodiment.

  In the above embodiment, the thickness of the wall surfaces 23, 33, 43, 53 on the upstream side with respect to the heat exchangers 8, 58 of the drain pans 9, 30, 40, 50 is set to the heat exchangers 8, 58. Since the distance between the drain pans 9, 30, 40, 50 and the centrifugal blower 5 can be further increased by making the wall thickness 22, 32, 42, 52 on the downstream side thinner, it is advantageous for noise reduction. .

  Moreover, although the present Example has demonstrated the ceiling-embedded cassette type indoor unit which provided the blower outlet around the housing | casing, the form which provided the blower outlet only in the surrounding two directions or one direction, and also a ceiling The present invention can also be applied to an indoor unit suspended from the indoor unit. The present invention can be applied in common to indoor units of a type that includes a centrifugal fan and is provided with a heat exchanger around or around the periphery thereof.

  In each of the above-described embodiments, air is sucked from the room through the centrifugal fan provided in the housing, and after cooling or heating the air through the heat exchanger provided on the discharge side of the centrifugal fan, In the indoor unit of the air conditioner that blows out, it is possible to prevent an increase in noise due to the close proximity of the centrifugal fan and the drain pan.

  In addition, this invention is not limited to each above-mentioned Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  DESCRIPTION OF SYMBOLS 3 ... Suction grill (indoor unit suction port), 5 ... Centrifugal blower, 7 ... Centrifugal fan, 7a ... Centrifugal fan suction port, 7b ... Centrifugal fan discharge port, 8, 58 ... Heat exchanger, 12 ... Air outlet ( Indoor unit outlet), 9, 30, 40, 50, 109 ... drain pan, 10, 36, 45, 110 ... bell mouth, 21, 31, 41, 51 ... bottom of drain pan, 22, 32, 42, 52 ... drain pan Wall surfaces (wall surface portions) positioned upstream from the heat exchanger of the wall, 23, 33, 43, 53... Wall surfaces (wall surface portions) positioned downstream from the heat exchanger of the drain pan, 24, 34, 44 , 54 ... a digging portion provided on the upstream side with respect to the heat exchanger of the drain pan, 37 ... a drain pump, 37a ... a suction port of the drain pump 37, 37b ... a drain pipe of the drain pump 37.

Claims (8)

An indoor unit suction port for sucking indoor air into the machine, a centrifugal blower for discharging air sucked from the indoor unit suction port to the surroundings, and a heat exchanger for cooling or heating the air provided on the discharge side of the centrifugal blower An air outlet that is provided downstream of the heat exchanger and blows out air; and a drain pan that is provided at a lower portion of the heat exchanger and receives condensed water generated in the heat exchanger, and the drain pan is provided in the heat exchanger. In contrast, a wall surface portion that rises upward from an end portion located on the upstream side and an end portion located on the downstream side, and the lower end of the discharge port of the centrifugal blower is located upstream from the heat exchanger of the drain pan. In the indoor unit of the air conditioner provided at a position higher than the upper end of the wall portion located at
The drain pan is characterized in that an upper end of the wall surface portion positioned on the upstream side with respect to the heat exchanger is formed lower than an upper end of the wall surface portion positioned on the downstream side with respect to the heat exchanger. Air conditioner indoor unit. In the indoor unit of the air conditioner according to claim 1,
The drain pan is provided with a digging portion dug further downward from the bottom surface between a wall surface portion located on the upstream side and a wall surface portion located on the downstream side with respect to the heat exchanger. An air conditioner indoor unit. The indoor unit of the air conditioner according to claim 2,
The indoor unit of an air conditioner, wherein the dug portion is provided upstream of the heat exchanger. The indoor unit of the air conditioner according to claim 2,
An air conditioner indoor unit comprising a drain pump for discharging drain water to the outside of the machine, and a suction port for the drain pump provided in the digging portion. In the indoor unit of the air conditioner according to claim 1,
It has the indoor unit suction port in the center, and has a decorative panel having the outlet around the indoor unit suction port, and a housing connected to the decorative panel,
Arranging the centrifugal blower, the heat exchanger, and the drain pan inside the housing,
An indoor unit for an air conditioner, wherein an electrical component box having a control board for controlling the indoor unit is provided outside the housing. The indoor unit of the air conditioner according to claim 2,
The indoor unit of an air conditioner, wherein an upper end of a wall surface portion located upstream of the heat exchanger of the drain pan is located below a lower end of the heat exchanger. In the indoor unit of the air conditioner according to claim 1,
The thickness of the wall surface portion located on the upstream side of the heat exchanger of the drain pan is thinner than the thickness of the wall surface portion located on the downstream side of the heat exchanger of the drain pan. The indoor unit of the harmony machine. In the indoor unit of the air conditioner according to claim 1,
The wall surface portion located on the downstream side of the heat exchanger of the drain pan and the heat exchanger than the distance between the heat exchanger and the wall surface portion located on the upstream side of the heat exchanger of the drain pan The indoor unit of an air conditioner characterized by having a larger distance from the air conditioner.

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