JP5148241B2 - Air conditioner indoor unit - Google Patents

Description

  The present invention relates to an indoor unit of an air conditioner that is, for example, a ceiling-embedded type, and more particularly to an improvement in a drain pump and float switch mounting structure.

  The indoor unit of the air conditioner that is embedded in the ceiling includes a blower, a heat exchanger, and a drain pan that receives drain water generated by the heat exchanger during cooling operation, inside the indoor unit main body arranged in the ceiling, A drain pump for discharging the drain water accumulated in the drain pan to the outside, a float switch, a control unit, and the like are provided.

  The float switch detects the drain water level in the drain pan, and sends a detection signal to the control unit when the water level exceeds a certain standard. The control unit sends a drive signal to the drain pump to discharge the drain water. When the drain water level falls and reaches a certain standard, the float switch sends a detection signal to the control unit again to stop the drain pump.

For example, [Patent Document 1] discloses a technique in which a drain pump and a float switch are supported in parallel with each other on the same support mechanism, and attached to the indoor unit main body, which is a housing, via this support mechanism. . This is because most of the indoor unit main body is made of a foamed polystyrene material which is a heat insulating material, and the support mechanism cannot be directly attached, which is a countermeasure.
JP 2004-85001 A

  In any case, the drain pump and the float switch are integrally attached to the top plate portion of the indoor unit body. By the way, the drain pump should ideally be able to suck up the drain water in the drain pan and discharge it to the outside. For this purpose, a suction portion is provided on the front end surface of the drain pump and is brought into close contact with the bottom wall of the drain pan.

  On the other hand, if the suction part is completely in close contact with the drain pan bottom wall, the suction becomes insufficient. Therefore, the suction part is intentionally attached with a certain gap. That is, the position of the drain pump is relatively low. On the other hand, the float switch detects the highest standard and the lowest standard water level of the drain water collected in the drain pan, and therefore requires a highly accurate mounting.

  As described above, most of the indoor unit main body is made of a polystyrene foam material, and a drain pan is assembled thereto. The drain pump and the float switch are integrally supported by the main body. As a matter of course, there is an assembly error, and although there is no problem with the installation of the drain pump, it is extremely difficult to install with high precision on the float switch.

  The present invention has been made on the basis of the above circumstances, and its purpose is to correct the relative displacement of the drain pump and the float switch with respect to the drain pan, and particularly to improve the mounting accuracy for the float switch, It is an object of the present invention to provide an indoor unit of an air conditioner that accurately detects the level of drain water collected in a drain pan and improves the operation quality of a float switch.

In order to satisfy the above object, the indoor unit of an air conditioner according to the present invention is disposed inside the indoor unit main body, which is a housing having an open bottom surface, facing the substantially central portion of the bottom opening and sucks air from the axial direction. Nde a blower for blowing the circumferential direction, the drain pan this surrounds a blow side of the blower housing the heat exchanger that will be placed, receiving drain water generated in the heat exchanger at the bottom of the heat exchanger Provide a float switch so that it is located on the primary side that is the heat exchange air introduction side of the heat exchanger , detect the level of drain water collected in the drain pan, and based on the detection signal of this float switch And the drain water collected in the drain pan is pumped up and discharged to the outside. The float switch and the drain pump each have a separate support, and the float switch Support Ji is detachably attached to the inner rising wall portion of the drain pan.

  According to the present invention, the relative displacement between the drain pump and the float switch with respect to the drain pan can be corrected, and particularly the mounting accuracy with respect to the float switch can be improved, and the level of drain water collected in the drain pan can be detected accurately. Thus, there is an effect of improving the operation quality of the float switch.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Note that components and components not labeled in the text are not shown. Also, in order to avoid complications in the figure, components and components may not be labeled. is there)
FIG. 1 is a perspective view of an air conditioner indoor unit of a ceiling embedded type according to an embodiment of the present invention, looking up. FIG. 2 is a bottom view of the indoor unit.

  The indoor unit of the air conditioner includes an indoor unit main body 1 that is inserted from an indoor side into a mounting opening provided on a ceiling board and is suspended and fixed to a so-called ceiling behind a hanging bolt or the like, and the indoor unit The decorative panel 2 is attached to the lower surface of the unit main body 1 and exposed to the indoor side from the ceiling board.

  The indoor unit main body 1 includes a casing 3 made of a sheet metal that has an open bottom surface and is formed by processing a thin metal plate on a top plate portion and a side surface portion. A heat insulating material made of a polystyrene foam material or the like is attached to the inner peripheral surface of the casing 3, and the entire inner peripheral surface is covered with the heat insulating material. Therefore, the indoor unit body 1 has a heat insulating structure.

  A blower 5 protected by a fan guard is disposed at a substantially central portion of the lower surface opening of the indoor unit main body 1. The blower 5 includes a so-called centrifugal fan (also referred to as “turbo fan”) that sucks air from the axial direction and blows it out in the circumferential direction. In the indoor unit main body 1, the upper part of the blower 5 is covered with the top plate part 1 a and the lower part is an opening, so that the lower face opening is on the suction side of the blower 5.

  A heat exchanger 6 having a substantially square frame shape in a plan view is arranged so as to surround the periphery of the blower 5 on the blowing side. A drain pan 7 is provided along the lower portion of the heat exchanger 6, and the drain pan 7 can receive drain water generated by the heat exchange action of the heat exchanger 6 during the cooling operation.

  The drain pan 7 is fitted into the inner peripheral wall of the indoor unit main body 1 and has a recess a that is recessed toward the inside on the outer side of the drain pan 7. Further, the drain pan 7 is formed so that only one inner corner portion protrudes in the inner diameter direction, and a drain port 8 is provided on the bottom wall of the drain pan 7 of the protrusion.

  The drain port 8 is an opening for draining drain water, scale-like substances, etc. (hereinafter collectively referred to as “drain water”) remaining in the drain pan 7 during maintenance. The drain port 8 is closed so as to be freely opened and closed by a drain cap 18 which is a closing member. 1 and 2 show a state where the drain cap 18 is removed from the drain port 8.

  The drain pump 10 is provided immediately above the drain port 8, and the drain pump 10 can be seen from the opened drain port 8. In other words, the drain port 8 is provided immediately below the drain pump 10 and is attached so that the central axis of the drain pump 10 coincides with the central axis of the drain port 8.

  The diameter of the drain port 8 is formed larger than the diameter of the drain pump 10, and the outer peripheral surface of the drain pump 10 can be completely seen from the drain port 8. Therefore, the drain pump 10 can be inserted into the drain port 8 by removing the drain pump 10. That is, the drain pump 10 can be detached from the drain port 8.

  An electrical component box 11 is provided in the vicinity of the drain port 8 and along a part of the inside of the drain pan 7. The electrical component box 11 is for housing a control unit including an electrical component that controls the electrical component accommodated in the indoor unit body 1 and an electrical component that performs transmission and reception with respect to the remote controller.

  The lower surface opening of the casing 3 is closed by the decorative panel 2 shown only in FIG. The decorative panel 2 is molded, for example, from a synthetic resin material and is beautifully finished. The decorative panel 2 is exposed to the room from the ceiling board and shields the gap between the peripheral surface of the indoor unit body 1 and the opening for mounting the ceiling board. .

  A suction port 12 is opened at a substantially central portion of the decorative panel 2 and can be opened and closed by a suction grill 13 provided with a filter. FIG. 1 shows a state where the suction grill 13 is opened and the suction port 12 is exposed. FIG. 2 shows a state in which the decorative panel 2 is removed from the indoor unit main body 1.

  If it demonstrates, the said inlet 12 will be opened in the site | part facing the air blower 5 and the inner side part of the drain pan 7, and has comprised the substantially rectangular shape. The suction grill 13 is attached to the suction port 12. If the suction grill 13 is opened to expose the suction port 12, the drain port 8 provided at one inner corner of the drain pan 7 can be opened via the suction port 12.

  The suction grill 13 shields the interior of the casing 3 from the suction port 12 while allowing the indoor air to flow through the suction port 12. At the time of maintenance, the filter can be removed by opening the suction grill 13 and the filter can be cleaned on the indoor floor.

  Air outlets 15 are provided along the sides of the decorative panel 2, and face the gap formed by the side wall of the indoor unit main body 1 and the recessed portion a of the drain pan 7. A bell mouth 16 is provided between the decorative panel 2 and the blower 5, and is surrounded by a drain pan 7. The bell mouth 16 is formed in a horn shape having a small diameter on the blower 5 side and a large diameter on the suction port 12 side of the decorative panel 2.

Next, the mounting structure of the drain pump 10 will be described in detail.
FIG. 3 is a schematic configuration diagram of a part of the indoor unit, and is a diagram illustrating a mounting structure of the drain pump 10.

  The drain pump 10 is attached to a pump support 17 whose upper end surface is a pump support with the suction portion 10a facing the drain port 8 on the lower side. In a state where the drain cap 18 is fitted in the drain port 8, the distance between the end surface of the suction portion 10 a of the drain pump 10 and the bottom wall of the drain pan 7, specifically, the drain cap 18 is very small.

  That is, the suction part 10 a of the drain pump 10 is supported so as to be completely immersed in the drain water collected in the drain pan 7. The pump support 17 includes a leg portion 17b extending from the pump support portion 17a to a portion directly above, and the upper end of the leg portion 17b is attached and fixed to the top plate portion 1a constituting the indoor unit main body 1.

  On the back surface side of the drain pump 10, a discharge portion that discharges drain water sucked from the suction portion 10 a is provided, and one end portion of the drain hose 19 is connected thereto. The drain hose 19 is wound between the leg portion 17b of the pump support 17 from the discharge portion, and is further routed between the upper end portion of the heat exchanger 6 and the indoor unit main body top plate portion 1a.

That is, a part of the heat insulating material 4 attached to the inner surface of the casing 3 is recessed in the top plate portion 1a of the indoor unit main body 1, and the drain hose 19 is inserted into the recessed portion b.
Although the processing to the heat insulating material 4 is necessary, since only the recessed portion b is formed, the man-hour is hardly affected. Further, no processing is required for the upper end portion of the heat exchanger 6, and there is no influence on the man-hours.

  The lower end surface of the heat exchanger 6 is placed on the jetty portion d provided integrally with the bottom wall of the drain pan 7. On the other hand, the upper end surface of the heat exchanger 6 is in contact with the heat insulating material 4 provided on the top plate portion 1 a of the indoor unit body 1. That is, the heat exchanger 6 is sandwiched and fixed between the indoor unit main body top plate portion 1a and the drain pan 7 from above and below.

  However, in the drain pan 7, when the jetty portion d supporting the heat exchanger 6 is provided over the entire circumference of the bottom wall of the drain pan 7, the drain water generated by the heat exchanger 6 is connected to the inner side of the jetty portion d. It will be bisected outside. On the other hand, the drain port 8 and the drain pump 10 are provided in an inner portion of the heat exchanger 6.

  The drain water that is generated by the heat exchanger 6 and flows down and collects inside the jetty d is guided to the drain port 8 and the drain pump 10 as it is. However, the drain water collected outside the jetty portion d accumulates there, and is not led to the drain port 8 and the drain pump 10 unless the jetty portion d overflows.

  For this reason, the jetty portion d is notched at a certain length in at least one location of the jetty portion d. That is, the jetty portion d is interrupted, and the bottom wall of the drain pan 7 is exposed at the interrupting portion e. Thereby, the drain water flowing down from the heat exchanger 6 to the outer portion of the jetty portion d is guided to the inner portion via the interruption portion e and is discharged from the drain port 8 or the drain pump 10.

A float switch 20 to be described later is attached to the vicinity of the drain pump 10.
Next, a structure for mounting the float switch 20 to the drain pump 10 will be described.
FIG. 4 is a perspective view showing a part of the indoor unit cut away, and is a view for explaining the mounting structure of the drain pump 10 and the float switch 20. FIG. 5 is a perspective view showing a part of the indoor unit disassembled and cut away, and is a view for explaining the mounting structure of the drain pump 10 and the float switch 20.

  As described above, the heat exchanger 6 is sandwiched between the drain pan 7 and the top plate portion 1 a constituting the indoor unit main body 1. A part of the drain pan 7 protrudes to the inside of the heat exchanger 6 and a drain port 8 is provided. The drain pump 10 is suspended from the top unit 1a of the indoor unit main body via a pump support 17, and the suction portion 10a at the tip of the drain pump 10 has a narrow gap with the drain cap 18.

  The inner side of the drain pan 7 and the blower 5 (not shown here) are provided to face the suction port 12 of the decorative panel 2, and the drain pump 10 is the primary side that is the heat exchange air introduction side of the heat exchanger 6. Located in. Since the float switch 20 is attached to the vicinity of the drain pump 10, the float switch 20 is also located on the primary side of the heat exchanger 6.

Next, the mounting structure of the float switch 20 will be described in detail.
FIG. 6 is a perspective view of the drain pan 7 to which the float switch 20 is attached. FIG. 7 is an enlarged perspective view of a part of FIG. 6 and particularly shows a mounting portion of the float switch 20. FIG. 8 is a perspective view illustrating a mounting structure of the float switch 20 to the drain pan 7.

  The float switch 20 includes a fixed base 21 that is a float switch support. The fixing base 21 is formed by processing a thin metal plate into a metal plate. The upper end of the float switch 20 is fixed to one end by screwing, and the fixing switch 21 protrudes from the peripheral surface of the float switch 20 to protect the float switch 20. Is formed.

  The other end portion of the fixed base 21 is an attachment portion 21b that is integrally projected from the attachment protection portion 21a in the horizontal direction, and a screw hole 22 is provided in the attachment portion 21b. A bent piece 21c is bent downward at an end edge of the attachment portion 21b, and a boss fitting hole 23 is provided in the bent piece 21c.

  The fixed base 21 provided in the float switch 20 is attached and fixed to the inner standing wall portion 7a of the drain pan 7 formed in a concave shape in cross section. That is, the width dimension from the side surface of the attachment protection part 21 a of the float switch 20 to the bent piece 21 c of the attachment part 21 b is formed substantially the same as the width dimension of the inner standing wall part 7 a of the drain pan 7.

  A screw insertion hole 25 having a diameter matching the screw hole 22 provided in the fixed base 21 is opened on the upper surface of the inner standing wall portion 7a. Although not shown in particular, the inner standing wall portion 7a itself is recessed from the lower portion toward the upper surface, so that the thickness of the upper surface portion is reduced.

  Therefore, when the mounting screw 26 shown in FIG. 8 is inserted into the screw insertion hole 25 from the lower side of the drain pan 7 through the recessed portion of the inner vertical wall portion 7a, the tip of the screw portion of the mounting screw 26 becomes the inner vertical wall portion. It protrudes from the upper surface of 7a. If the screw hole 22 of the float switch fixing base 21 is provided here, the mounting screw 26 can be screwed into the screw hole 22, and the float switch fixing base 21 can be attached to the inner standing wall portion 7a.

  Further, a positioning boss 27 is integrally projected on the wall surface of the drain pan inner standing wall portion 7a. The positioning boss 27 has a circular shape, and the diameter thereof is the same as that of the boss fitting hole 23 provided in the mounting portion bent piece 21 c of the float switch fixing base 21.

This is the configuration of the inner standing wall portion 7a of the drain pan 7 with respect to the fixed base 21 of the float switch 20, and the float switch fixed base 21 is attached to the drain pan 7 as described below.
Specifically, as shown in FIG. 8, the float switch 20 is attached to the fixed base 21, and the attachment portion 21 b of the fixed base 21 is opposed to the upper portion of the inner standing wall portion 7 a of the drain pan 7. Then, the fixed base 21 is lowered, and the attachment portion 21b of the fixed base 21 is fitted into the drain pan inner wall 7a. Since the width dimension of the attachment part 21b and the width dimension of the inner standing wall part 7a are substantially the same, it can fit smoothly.

  Further, the boss fitting hole 23 provided in the attaching portion bent piece 21c is fitted to the positioning boss 27 of the drain pan inner standing wall portion 7a. Since the drain pan 7 is formed of a foamed polystyrene material and has elasticity, it does not take time to fit the boss fitting hole 23 to the positioning boss 27.

  In this state, the screw hole 22 of the fixed base communicates with the screw insertion hole 25 of the drain pan 7. Therefore, the mounting screw 26 is inserted from the lower side of the drain pan 7 through the recessed portion formed on the lower surface of the inner standing wall portion 7a. The fixing base 21 can be mounted and fixed to the drain pan 7 together with the float switch 20 by screwing the mounting screws 26 into the screw holes 22 through the screw insertion holes 25.

  The above is the work performed with the drain pan 7 incorporated in the indoor unit main body 1. Prior to mounting in the indoor unit main body 1, the fixed base 21 is attached to the single drain pan 7 so that the drain pan 7 is in an upright posture. For example, the fixed base 21 is fitted to the drain pan inner vertical wall portion 7a from the left direction. Then, the mounting screw 26 can be screwed from the right direction.

When the float switch 20 is removed as necessary in the maintenance work for the indoor unit that is embedded in the ceiling, the suction grill 13 is rotated in advance as shown in FIG. 12 is exposed.
Then, a tool is inserted through the exposed suction port 12 and the mounting screw 26 is removed. The fixed base 21 is free with respect to the drain pan 7 and can be removed via the suction port 12 with the float switch 20 provided.

  After performing the necessary maintenance, the integral part of the float switch 20 and the fixed base 21 is inserted into the suction port 12 and fitted into the drain pan inner wall 7a, and the mounting screw 26 is screwed through the screw insertion hole 25. Screw into the hole 22. Accordingly, the drain switch 7 and the float switch 20 can be attached and detached without removing the drain pan 7 and the like from the indoor unit body 1.

  In the indoor unit of the ceiling-embedded air conditioner configured as described above, when the blower 5 is driven, the indoor air is guided to the bell mouth 16 through the suction grille 13 and the suction port 12, and the indoor unit body 1 Sucked in. The room air flows through the heat exchanger 6 from the primary side of the heat exchanger 6 and is led to the secondary side after heat exchange.

  Then, the heat exchange air is blown out into the room through the blowout port 15 to harmonize the room air. In particular, during cooling operation, drain water is generated along with the heat exchange action of the heat exchanger 6 and dripped into the drain pan. As time passes, the amount of drain water collected in the drain pan 7 increases, and the water level rises.

  The float switch 20 always detects the level of drain water in the drain pan 7. When it is detected that the water level of the drain water exceeds the reference maximum water level, the float switch 20 sends a detection signal to the control unit. The control unit sends a drive signal to the drain pump 10, and the drain pump 10 sucks up drain water and discharges it to the outside through the drain hose 19.

  The drain water collected in the drain pan 7 is smoothly drained without overflowing the drain pan 7. When the float switch 20 detects that the drain water level has gradually dropped to the lowest reference water level, a detection signal is sent to the control unit again. The control unit sends a stop signal to the drain pump 10 to stop drainage of drain water.

  The drain pump 10 is suspended from the indoor unit main body top plate 1 a via the pump support 17 and is affected by an assembly error of the drain pan 7 with respect to the indoor unit main body 1. That is, the dimensional accuracy between the bottom wall of the drain pan 7 and the suction part 10a of the drain pump 10 is rough, and there is a width for each machine. However, the drain pump 10 is not affected by the drain water suction action.

  On the other hand, since the float switch 20 is directly attached to the drain pan 7, the attachment accuracy is high, and the water level of the drain water collected in the drain pan 7 can be detected with high accuracy. Therefore, the drive control for the drain pump 10 becomes more accurate, and it is possible to reliably prevent the overflow of drain water and to improve the reliability.

  In summary, the relative displacement between the drain pump 10 and the float switch 20 with respect to the drain pan 7 can be corrected, and particularly the mounting accuracy with respect to the float switch 20 can be improved, and the water level of the drain water collected in the drain pan 7 can be obtained. Can be detected accurately, and the operation quality of the float switch 20 can be improved.

  The float switch fixing base 21 is fixedly attached to the upper surface of the drain pan inner vertical wall portion 7a. Therefore, even if the fixed base 21 is formed from a thin metal plate, it is not affected by the drain water collected in the drain pan 7. The fixed base 21 is protected from drain lime, rust, etc., and can ensure durability.

  The float switch fixing base 21 is attached to the primary side of the heat exchanger 6, which is the heat exchange air introduction side of the heat exchanger 6. In particular, in a ceiling-embedded indoor unit, the size of the indoor unit body 1 is limited in order to reduce the size, while the opening area of the inlet 12 is maximized in order to increase the amount of suction. Is set.

  For this reason, the dimension between the outer vertical wall 7b of the drain pan 7 and the side wall of the indoor unit main body 1, which is the secondary side of the heat exchanger 6, cannot be increased. Therefore, the secondary side of the heat exchanger 6 has a minimum necessary space, and the heat exchanger 6 can only be deformed to arrange the drain pump 10 and the float switch 20.

  Here, the float switch 20, the drain port 8, and the drain pump 10 are arranged on the primary side of the heat exchanger 6, and the float switch fixing base 21 and the drain pump support 17 are attached. Therefore, the minimum necessary space for the secondary side of the heat exchanger 6 can be secured, and deformation processing for the heat exchanger 6 is not required.

  When the float switch 20 needs to be removed for maintenance work, the inner standing wall portion 7a of the drain pan 7 is exposed by opening the suction grill 13 of the decorative panel 2 to expose the suction port 12. Therefore, the fixed base 21 can be removed from the drain pan 7 by inserting a tool and removing the mounting screw 26.

  Therefore, it is possible to remove the float switch 20 with the decorative panel 2, the drain pan 7, or the electric component box 11 as they are, and an improvement in maintenance workability can be obtained. Of course, the fixing base 21 of the float switch 20 can be attached to the drain pan 7 through the suction port 12.

  The positioning boss 27 is provided on the wall surface of the inner standing wall portion 7a of the drain pan 7 so that the float switch fixing base 21 is positioned. Since the positioning boss 27 is provided on the drain pan inner vertical wall portion 7a, the positioning boss 27 can be easily observed and the workability is good.

By positioning the float switch fixing base 21, the positions of the screw insertion holes 25 on the upper surface of the drain pan inner vertical wall portion 7a and the screw holes 22 of the fixing base mounting portion 21b are accurately determined. Then, the mounting screw 26 can be easily screwed into the screw hole 22 from the lower side of the drain pan 7 through the screw insertion hole 25, so that the fixing base 21 can be easily attached.
Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments.

The perspective view in the state which looked up at the indoor unit of the air conditioner based on one embodiment in this invention. The bottom view of the indoor unit main body which removed the decorative panel based on the embodiment. Sectional drawing of a part of indoor unit based on the embodiment. The perspective view which cut off some indoor units based on the embodiment. The perspective view which disassembled and cut off some indoor units based on the embodiment. The perspective view of the drain pan which attached the drain pump and the float switch based on the embodiment. The perspective view which expanded a part of drain pan which attached the drain pump and the float switch based on the embodiment. The perspective view explaining attachment of the float switch with respect to the drain pan based on the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Indoor unit main body, 6 ... Heat exchanger, 7 ... Drain pan, 20 ... Float switch, 10 ... Drain pump, 21 ... Fixed base (support of float switch), 17 ... Drain pump support (support of drain pump) ) 1a ... top plate portion, 2 ... decorative panel, 12 ... suction port, 15 ... blowout port, 26 ... mounting screw (mounting tool), 27 ... positioning boss.

Claims (3)

An indoor unit main body which is a housing having an open bottom surface ;
A blower housed in the interior of the indoor unit body, disposed opposite to the substantially central portion of the lower surface opening, sucks air from the axial direction and blows it out in the circumferential direction, and surrounds a blower side of the blower arranged heat exchangers and Ru, are provided in the lower portion of the heat exchanger, a drain pan for receiving drain water generated in the heat exchanger,
A float switch that is provided to be positioned on a primary side that is a heat exchange air introduction side of the heat exchanger , and that detects a water level of drain water collected in the drain pan;
It operates based on the detection signal of this float switch, and comprises a drain pump that pumps up drain water collected in the drain pan and discharges it to the outside.
The float switch and the drain pump each have a separate support,
Support of the float switch, the indoor unit of an air conditioner, wherein removably be mounted et the inside rising wall portion of the drain pan. " The lower surface opening of the indoor unit main body is a decorative panel provided with a suction port facing the inner side of the drain pan, and provided with a blowout port facing the outer side of the drain pan and the side wall of the indoor unit main body. Closed
2. The air conditioner according to claim 1, wherein an attachment for attaching the float switch support to the drain pan can be inserted from a lower part of the indoor unit main body through a suction port of the decorative panel. Indoor unit of the machine. The indoor unit of an air conditioner according to claim 2, wherein a positioning boss for positioning the support body of the float switch is provided on an inner wall portion of the drain pan.

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