CN113614466B - Indoor unit of air conditioner - Google Patents

Abstract

An indoor unit of an air conditioner according to an embodiment includes: a housing including a side plate; a heat exchanger housed in the case; a drain pan disposed below the heat exchanger and receiving dew condensation water generated from the heat exchanger; a pump discharging water accumulated in the drain pan; and a fixing member fixing the pump to the side plate. The fixing member has a lower surface opposite to the drain pan, and an upper surface opposite to the lower surface. The pump is disposed between the lower surface and the drain pan. Further, the upper surface is inclined so as to descend toward the drain pan side as being distant from the side plate.

Description

Indoor unit of air conditioner

technical field

Embodiments of the present invention relate to an indoor unit of an air conditioner.

Background technique

For example, in a ceiling-mounted air conditioner, the indoor unit is suspended from the back of the ceiling. The indoor unit includes an air blower, a heat exchanger, and a casing that accommodates them. In addition, a drain pan for receiving water generated by dew condensation of the heat exchanger, and a drain pump for sending the water accumulated in the drain pan to a drain connection port provided in the housing are arranged inside the housing.

In many cases, the drain pump is fixed to the vicinity of the side plate of the casing by the fixing member, and the connection port is also provided in the side plate. The drain pump and the connection port are connected by a hose. The water accumulated in the drain pan is low temperature, so if the water passes through the hose, condensation may form on the surface.

For example, by passing the hose through the drain pump and the fixing member, the width of the casing can be reduced compared to the case where these are arranged laterally. However, in this structure, if water drips by condensation on the surface of the hose, the water reaches the side plate through a lower fixing member or the like, and may leak out of the casing. The same problem may arise also in indoor units of air conditioners other than the ceiling-mounted type.

prior art literature

Patent Literature

Patent Document 1: International Patent Publication No. 2012/176805

SUMMARY OF THE INVENTION

The technical problem to be solved by the invention

The problem to be solved by the present invention is to provide an indoor unit capable of suppressing the leakage of water generated by condensation near the drain pump to the outside of the casing.

technical means for solving technical problems

An indoor unit of an air conditioner according to an embodiment includes: a casing including a side plate; a heat exchanger accommodated in the casing; A drain pan for dew condensation; a pump for draining the water accumulated in the drain pan; and a fixture for fixing the pump to the side plate. The fixing member has a lower surface opposite to the drain pan, and an upper surface on the opposite side of the lower surface. The pump is arranged between the lower surface and the drain pan. Further, the upper surface is inclined so as to descend toward the drain pan side as it moves away from the side plate.

Description of drawings

FIG. 1 is a perspective view showing an appearance of an indoor unit according to an embodiment.

Fig. 2 is a schematic perspective view showing the interior of the above-mentioned indoor unit.

Fig. 3 is a schematic cross-sectional view of the above-mentioned indoor unit.

Fig. 4 is a schematic side view of the above indoor unit.

Fig. 5 is a schematic perspective view of the vicinity of the drain pump inside the indoor unit.

FIG. 6 is an enlarged perspective view showing the drain pump, the fixing member and the float switch shown in FIG. 5 .

FIG. 7 is a schematic plan view of each element shown in FIG. 6 .

FIG. 8 is a schematic side view of the elements shown in FIG. 6 .

FIG. 9 is a schematic cross-sectional view of each element along line IX-IX in FIG. 7 .

FIG. 10 is a schematic cross-sectional view of each element along line X-X in FIG. 7 .

Detailed ways

An embodiment will be described with reference to the drawings.

FIG. 1 is a perspective view showing the appearance of the indoor unit 1 according to the present embodiment. FIG. 2 is a schematic perspective view showing the interior of the indoor unit 1 . FIG. 3 is a schematic cross-sectional view of the indoor unit 1 . The indoor unit 1 is arranged indoors, for example, and is connected to an outdoor unit arranged outdoors via a refrigerant pipe. An air conditioner provided with a refrigeration cycle is constituted by the indoor unit 1, the outdoor unit, and the refrigerant piping.

As shown in FIG. 1 , the indoor unit 1 includes a casing 2 and a panel 3 covering the lower surface of the casing 2 . A plurality of suspension fittings 2 a are provided on the outer peripheral surface of the casing 2 . The indoor unit 1 is fixed to the ceiling of the space to be air-conditioned by connecting these suspension fittings 2a to suspension bolts suspended from beams on the back of the ceiling.

The panel 3 has a main body 30 , a suction port 31 and an air outlet 32 . The suction port 31 includes a grill 33 that is removable from the main body 30 and a filter 34 (see FIG. 3 ) that is arranged inside the grill 33 . The blower outlet 32 includes a flap 35 that is openable and closable with respect to the main body 30 . In FIG. 1, the state which closed the blower outlet 32 by the flap 35 is shown.

The internal structure shown in FIG. 2 corresponds to the structure which removed the panel 3 and the drain pan 50 mentioned later, and looked at the inside of the casing 2 from the downward direction in FIG. The case 2 has a box shape opened on the panel 3 side (upper side in FIG. 2 ). Specifically, the casing 2 includes: a rectangular top plate 20 which becomes the upper surface of the indoor unit 1 when attached to the ceiling; a first side plate 21 along one short side of the top plate 20 ; and a second short side along the top plate 20 the second side plate 22 ; and the third side plate 23 along one long side of the top plate 20 .

In addition, the casing 2 further includes a fourth side plate 24 (see FIG. 1 ) along the other long side of the top plate 20 , but the fourth side plate 24 is omitted in FIG. 2 and will be along the fourth side plate 24 A part of the arranged heat insulating material 25 is cut. For example, the top plate 20 and each of the side plates 21 to 24 are made of metal. The heat insulating material 25 can be made of foamed plastic such as foamed polystyrene, for example.

Inside the casing 2 , a partition plate 26 is arranged along the longitudinal direction of the casing 2 . The inner space of the casing 2 is divided into the ventilation chamber A and the heat exchange chamber B by the partition plate 26 . In the ventilation chamber A, the ventilation device 4 is arranged. The heat exchanger 5 is arranged in the heat exchange chamber B.

As shown in FIG. 3 , between the heat exchanger 5 and the panel 3 , a drain pan 50 for receiving the drain water dripped from the heat exchanger 5 is arranged. The drain pan 50 can be made of foamed plastic such as foamed polystyrene, for example.

As shown in FIG. 2, between the heat exchanger 5 and the 1st side plate 21, the drain pump 6 etc. which discharge|release the drain water accumulated in the drain pan 50 are arrange|positioned. The first side plate 21 is provided with connection ports 51a and 51b for connecting pipes through which the refrigerant flows, and a connection port 60 for connecting pipes for discharging drain water. The connection ports 51 a, 51 b are connected to the heat exchanger 5 . The connection port 60 is connected to the drain pump 6 .

The air blower 4 includes a fan motor 40 , a pair of fan units 41 a and 41 b , and a rotating shaft 42 . The fan units 41a and 41b are arranged to face each other with the fan motor 40 therebetween. The rotating shaft 42 is rotatably supported by the fan motor 40, and both ends thereof extend toward the fan units 41a and 41b, respectively. In addition, the number of fan units with which the air blower 4 is equipped is not limited to two.

As shown in FIGS. 2 and 3 , the fan units 41 a, 41 b include a multi-blade fan 43 connected to the rotating shaft 42 , and a fan casing 44 that accommodates the multi-blade fan 43 . The fan case 44 has an air intake hole 45 and a nozzle portion 46 . The nozzle portion 46 is opened in the heat exchange chamber B, and faces the heat exchanger 5 .

As shown in FIG. 3 , the heat exchanger 5 includes a plurality of plate-shaped fins 52 and a plurality of heat transfer pipes 53 through which the refrigerant flows. Each fin 52 is inclined so that one end on the side of the ventilation chamber A is positioned further below (the direction toward the panel 3 ) with respect to the other end. The plurality of fins 52 are arranged in the longitudinal direction of the indoor unit 1 (the direction from the first side plate 21 toward the second side plate 22 ). The plurality of heat transfer pipes 53 extend in the longitudinal direction of the indoor unit 1 and penetrate through the fins 52 .

The flow paths of the heat exchanger 5 including the heat transfer pipes 53 are connected to the connection ports 51a and 51b. That is, the refrigerant supplied from one of the connection ports 51a and 51b passes through each heat transfer pipe 53 and is then discharged to the other of the connection ports 51a and 51b.

The ventilation chamber A communicates with the suction port 31 . When the sirocco fan 43 rotates, the air is taken in by the blower chamber A through the suction port 31 . In addition, this air is sucked into the inside of the sirocco fan 43 through the intake hole 45 , and is blown out from the nozzle portion 46 toward the heat exchanger 5 . The heat exchanger 5 converts this air into cold or warm heat exchange air. The heat exchange air is sent out to the space to be air-conditioned through the air outlet 32 .

As shown in FIG. 2 , the electric unit 27 is arranged near the first side plate 21 . The electrical unit 27 includes a first electrical component box 27a and a second electrical component box 27b. The first electrical component box 27 a is located outside the first side plate 21 . The second electrical component box 27b is located between the blower 4 and the first side plate 21 .

Each of the electrical component boxes 27a and 27b includes, for example, a circuit board on which a plurality of IC chips are mounted, a reactor, and various electrical equipment such as a terminal block. These electrical devices control electrical elements of the indoor unit 1 such as the air blower 4 and the drain pump 6 .

FIG. 4 is a schematic side view of the indoor unit 1 shown in FIG. 1 viewed from the first side plate 21 side. The first side plate 21 is provided with the above-described connection ports 51a, 51b, and 60, the first electrical component box 27a, and the like.

In the example of FIG. 4 , the first electrical component box 27 a is located in the vicinity of the third side plate 23 , and the connection ports 51 a and 51 b are located in the vicinity of the fourth side plate 24 . The connection port 60 is located between the first electrical component box 27a and the connection ports 51a and 51b.

The base of the connection port 60 is provided with a flange 60a. The connection port 60 is connected to the first side plate 21 by inserting the screw S1 into the female screw of the first side plate 21 through the through hole provided in the flange 60a. Further, below the flange 60a, the first side plate 21 is provided with through holes into which three screws S2 are inserted. Each screw S2 connects the fastener 7 to be described later to the first side plate 21 .

The 1st cover body 21a detachably with respect to the 1st side plate 21 is provided in the vicinity of the connection port 51a, 51b. Moreover, the 1st electrical component box 27a is provided with the 2nd cover body 21b which can be detached with respect to the 1st electrical component box 27a. The maintenance and other operations of the elements arranged in the vicinity of the first side plate 21 can be performed through an inspection port, which is opened by removing the covers 21a and 21b, and the lower opening of the case 2, and the case 2 The lower opening of the s is created by removing the panel 3 and the drain pan 50 .

FIG. 5 is a schematic perspective view showing the inside of the casing 2 in the vicinity of the drain pump 6 . In addition, in FIG. 5, piping etc. for connecting the top plate 20, the 4th side plate 24, the heat insulating material 25, the heat exchanger 5, the connection ports 51a, 51b and the heat exchanger 5 are abbreviate|omitted.

The drain pump 6 is fixed to the first side plate 21 by the fixing tool 7 . The fixing tool 7 is made of resin, for example, and covers the upper part of the drain pump 6 . That is, the drain pump 6 is located between the fixing member 7 and the drain pan 50 . As the resin material constituting the fixture 7, for example, ABS resin and PS resin can be used.

The drain pan 50 has a recessed portion 54 at a position facing the drain pump 6 . In addition, the concave portion 54 is provided with a drain port 55 . The drain port 55 is closed by the plug body 56 .

The drain pump 6 includes a main body 61 , a suction port 62 located at the lower end of the main body 61 , and a drain hose 63 through which the water sucked from the suction port 62 passes. The suction port 62 is located in the concave portion 54 . The drain hose 63 extends from the main body 61 in a direction away from the first side plate 21 , then bends upward, and further bends toward the first side plate 21 . A connection port 60 is attached to the front end of the drain hose 63 . When the drain pump 6 operates, the water accumulated in the drain pan 50 is sucked from the suction port 62 , and the water is sent to the connection port 60 through the drain hose 63 .

The inner surface of the first side plate 21 is covered with a plate-shaped heat insulating material 28 . The heat insulating material 28 can be made of foamed plastic such as foamed polystyrene, for example. The heat insulating material 28 has a rectangular opening 28a through which the fixing member 7 passes, a circular opening 28b through which the sleeve 60b (see FIG. 6 ) of the connection port 60 passes, and the connection ports 51a and 51b and the heat exchanger 5 A pair of circular openings 28c and 28d through which the connected pipes pass. In addition, the first side plate 21 is also formed with openings facing the openings 28b, 28c, and 28d.

In the example of FIG. 5 , the float switch 8 is arranged above the recessed portion 54 of the drain pan 50 . Although not shown, the float switch 8 further includes a control circuit and wiring for outputting the water level information of the drain pan 50 to the above-described electric unit 27 . The water level information may be a signal output to the electric unit 27 according to the fact that the water level of the drain pan 50 has risen to a predetermined position. Furthermore, the water level information may be a signal that is always output to the electric unit 27 and indicates the water level of the drain pan 50 . For example, when it is determined that the water level of the drain pan 50 has risen to a predetermined position based on the above-described water level information, the electric unit 27 abnormally stops the indoor unit 1 .

FIG. 6 is an enlarged perspective view showing the drain pump 6 , the fixing member 7 and the float switch 8 shown in FIG. 5 . FIG. 7 is a schematic plan view of each element shown in FIG. 6 . FIG. 8 is a schematic side view of the elements shown in FIG. 6 . FIG. 9 is a schematic cross-sectional view of each element along line IX-IX in FIG. 7 . FIG. 10 is a schematic cross-sectional view of each element along line X-X in FIG. 7 . In addition, in FIGS. 7-10, a part of the drain hose 63 is abbreviate|omitted.

As shown in each figure, the fixing tool 7 has a first end 7a, a second end 7b, a third end 7c on the opposite side of the second end 7b, and a fourth end on the opposite side of the first end 7a Section 7d. The first end portion 7 a is opposed to the first side plate 21 . The second end portion 7b faces the partition plate 26 . As shown in FIG. 7 , the second end portion 7b extends perpendicularly to the first end portion 7a, and is gently curved at the midsection. The third end portion 7c extends perpendicular to the first end portion 7a without being bent.

The first end portion 7a is provided with three female threads 70 . The three screws S2 shown in FIG. 4 are screwed into these internal threads 70, respectively. Thereby, the fixing tool 7 is connected to the first side plate 21 .

The fixing member 7 has an upper surface F1 facing the drain hose 63 and a lower surface F2 facing the drain hose 6 . The upper surface F1 has a circular first convex portion 71 and three second convex portions 72 arranged around the first convex portion 71 .

As shown in FIG. 9 , the main body 61 of the drain pump 6 is positioned below the first convex portion 71 . There is a gap between the main body 61 and the lower surface F2 of the fixture 7 . The drain pump 6 has three attachment parts 64 extending from the main body 61 to the positions of the respective second convex parts 72 . The front end portion of the attachment portion 64 is in contact with the lower surface F2 below the second convex portion 72 .

In the second convex portion 72 on the left in FIGS. 7 and 8 , as shown by the dotted line, a female thread 72 a opened on the lower surface F2 is provided inside the second convex portion 72 . The front end portion of the attachment portion 64 is provided with a through hole into which a screw S3 is inserted from below, and the screw S3 is screwed into the female thread 72a. The other 2nd convex part 72 and the attachment part 64 are similarly connected by the screw S3. Thereby, the drain pump 6 and the fixing member 7 are fixed to each other.

As shown in FIG. 10 , the upper surface F1 is inclined at an angle θ1 (an acute angle) with respect to the horizontal direction, except for the respective convex portions 71 and 72 , so that the edge on the side of the fourth end portion 7d is relative to the edge on the side of the first end portion 7a located further down in the direction of gravity. From another viewpoint, the upper surface F1 is inclined so as to descend toward the drain pan 50 as it moves away from the first side plate 21 .

As shown in FIGS. 6 and 7 , the upper surface F1 is provided with a first rib 73a along the first end 7a, a second rib 73b along the second end 7b, and a second rib 73b along the third end 7c. The third rib 73c. All of the above-mentioned ribs 73a to 73c protrude upward from the upper surface F1.

The second rib 73b is connected to one end of the first rib 73a. The third rib 73c is connected to the other end of the first rib 73a. As shown in FIG. 5 , the first rib 73 a extends linearly along the first side plate 21 inside the opening 28 a of the heat insulating material 28 in a state where the fixture 7 is attached to the first side plate 21 . The second rib portion 73 b and the third rib portion 73 c extend in a direction away from the first side plate 21 .

As shown in FIG. 6 , the upper surface F1 has a concave portion 74 facing the drain hose 63 . The recess 74 is also opposite to the sleeve 60b protruding from the flange 60a. The concave portion 74 is, for example, a gentle curved surface. The first rib portion 73 a is recessed according to the shape of the recessed portion 74 .

As shown in FIGS. 7 and 9 , in the vicinity of the boundary between the concave portion 74 and the first convex portion 71 , a hole 75 penetrating from the upper surface F1 to the lower surface F2 is provided. In the recessed portion 74, the upper surface F1 is inclined at an angle θ2 (an acute angle) so that the edge on the side of the hole 75 is positioned further below the edge on the side of the first end portion 7a. The angle θ2 may be the same as the angle θ1 or may be different.

The holder 7 further includes a holding portion 76 for holding the above-described float switch 8 . In the example of FIGS. 7-10, the holding|maintenance part 76 has the arm 77 extended from the 4th end part 7d, and the notch 78 provided in the front-end|tip 77a of the arm 77. As shown in FIG.

The float switch 8 includes a shaft 80 passing through the cutout 78 , and a float 81 slidable along the shaft 80 . The shaft 80 is, for example, a bolt, and is fixed to the front end 77a of the arm 77 by a pair of nuts N1 and N2. When the water level of the drain pan 50 rises, the float 81 rises with the water surface. The water level information corresponding to the position of the float 81 is output to the electric unit 27 as described above.

The arm 77 extends to the drain pan 50 side with respect to the lower surface F2. Further, the arm 77 has an inclined surface F3 connected to the upper surface F1. The inclined surface F3 may have a plurality of parts inclined at different angles, for example, as shown in FIG. 10 . The angles of the above-mentioned portions may be larger than the above-mentioned angle θ1. As another example, the inclined surface F3 may be inclined at a certain angle as a whole, or may be a curved surface.

The said 3rd rib part 73c is extended to the vicinity of the front-end|tip 77a. Moreover, the arm 77 has the 4th rib part 79 which opposes the 3rd rib part 73c. The inclined surface F3 is sandwiched between the third rib portion 73 c and the fourth rib portion 79 described above.

In the above structure, at least a part of the water after dew condensation on the surface of the drain hose 63 falls on the upper surface F1 of the fixture 7 . In this embodiment, since the upper surface F1 is inclined toward the inside of the casing 2 , the water falling on the upper surface F1 flows in a direction away from the first side plate 21 . For example, the water flows from the upper surface F1 to the inclined surface F3 of the arm 77, and falls into the drain pan 50 from the front end 77a. Alternatively, the water falling on the upper surface F1 flows into the concave portion 74 and falls into the drain pan 50 through the hole 75 .

Assuming that when the water falling on the upper surface F1 flows toward the first side plate 21, the water may leak out of the indoor unit 1 from the connecting portion of the first side plate 21 and the panel 3, etc., or be trapped in the water. Dew condensation occurs inside and outside the cooled first side plate 21 . Therefore, an additional member for preventing water from reaching the first side plate 21 and an additional heat insulating material for preventing the first side plate 21 from being cooled are required, and the manufacturing cost increases.

On the other hand, in the structure of this embodiment, since the water falling on the upper surface F1 does not flow to the 1st side plate 21, the above-mentioned water leakage and dew condensation in the 1st side plate 21 can be suppressed. In addition, since the above-mentioned effects are achieved by the shape of the fixing member 7 of the drain pump 6, an additional member or an additional heat insulating material is not required.

Moreover, the upper surface F1 is provided with the 1st rib part 73a, the 2nd rib part 73b, and the 3rd rib part 73c. The above-mentioned ribs 73a to 73c can more reliably prevent the water falling from the drain hose 63 to the upper surface F1 from reaching the first side plate 21 .

Moreover, in the upper surface F1, the recessed part 74 and the hole 75 which oppose the drain hose 63 are provided in the vicinity of the 1st end part 7a. By the recessed part 74 and the hole 75 mentioned above, the water which fell from the drain hose 63 to the vicinity of the 1st end part 7a is easily drained to the lower surface F2 side.

As described above, when the stator 7 is formed of a resin material, the heat conduction between the stator 7 and the first side plate 21 can be suppressed compared with the case where the stator 7 is formed of a metal material. Therefore, the first side plate 21 is not easily cooled, and dew condensation inside and outside the first side plate 21 can be suppressed more reliably.

The configuration in this embodiment has the effect of suppressing water leakage and dew condensation near the first side plate 21 , reducing the size of the indoor unit 1 and improving the efficiency of installation work and maintenance work.

That is, if the drain hose 63 is arranged so as not to overlap the drain pump 6 and the fixture 7 in the direction of gravity, the width of the casing 2 will be increased. On the other hand, in the present embodiment, since the fixture 7 has a structure in which water does not easily reach the first side plate 21 , the drain hose 63 can be arranged on the fixture 7 . Thereby, the width of the casing 2 can be reduced.

In addition, in this embodiment, the fixing tool 7 holds the float switch 8 . As a result, it is not necessary to arrange other components for holding the float switch 8, so that the number of components can be reduced, and the housing 2 can be made more compact.

In addition, as shown in FIGS. 4 and 5 , elements such as the electrical unit 27 (the first electrical component box 27 a ), the connection ports 51 a and 51 b of the refrigerant piping, the drain pump 6 , and the connection port 60 for drain discharge are along the first The side plate 21 is provided. Therefore, in the installation work and the maintenance work, the work for these elements can be performed as long as the vicinity of the first side plate 21 is approached, so that the work efficiency is improved compared with the case where these elements are distributed and arranged.

In addition, inside the casing 2, the piping connecting the heat exchanger 5 and the connection ports 51b and 51a, the drain pump 6, and the electric unit 27 do not overlap in the direction of gravity. Assuming that the above-mentioned elements overlap in the direction of gravity, at least some of the elements are difficult to access, and the efficiency of installation work and maintenance work may be significantly reduced. On the other hand, in the structure of this embodiment, such a problem does not arise either.

Several embodiments of the present invention have been described, but these embodiments are presented by way of example only, and are not intended to limit the scope of the present invention. These new embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the invention described in the scope of the claims and their equivalents.

For example, the shape of the fixing member 7 is not limited to the shape disclosed in the above-mentioned embodiment. The specific shape of the fixing tool 7 can be modified into various forms according to the shapes of the drainage pump 6 , the drainage hose 63 , the first side plate 21 , the partition plate 26 , the drainage pan 50 , and the like arranged around.

In the above-mentioned embodiment, the fixing structure of the drain pump 6 in the ceiling-embedded indoor unit was disclosed. This fixing structure can be applied not only to the ceiling-embedded type, but also to other kinds of indoor units.

Label description

1 indoor unit

2 shell

3 panels

4 Air supply device

5 Heat Exchanger

21 to 24 1st to 4th side panels

6 Drain pump

7 Fasteners

8 Float switch

60 connector

61 The main body of the drain pump

62 suction port

63 Drain hose

73a 1st rib

73b 2nd rib

73c 3rd rib

74 Recess

75 holes

76 Retention Department

77 Arm

Top surface of F1 mount

The lower surface of the F2 mount.

Claims (7)

1. An indoor unit of an air conditioner, comprising:

a housing including a side plate;

a heat exchanger housed in the case;

a drain pan disposed below the heat exchanger and receiving dew condensation water generated from the heat exchanger;

a pump discharging water accumulated in the drain pan; and

a fixing member fixing the pump to the side plate,

the fixing member has a lower surface opposite to the drain pan and an upper surface opposite to the lower surface,

the pump is disposed between the lower surface and the drain pan,

the upper surface is inclined so as to descend toward the drain pan side as being distant from the side plate,

a hose connected to a connection port provided in the side plate and the pump and configured to send water pumped up from the drain pan by the pump to the connection port,

the upper surface is opposed to the hose so that at least a part of water condensed on a surface of the hose falls on the upper surface of the fixing member.

2. An indoor unit as claimed in claim 1,

the fixing member has a 1 st rib protruding from the upper surface and extending along the side plate.

3. An indoor unit as claimed in claim 2,

the fixing member further has 2 nd and 3 rd ribs protruding from the upper surface,

the 2 nd rib is connected to one end of the 1 st rib and extends in a direction away from the side plate,

the 3 rd rib is connected to the other end of the 1 st rib and extends in a direction away from the side plate.

4. An indoor unit as claimed in claim 1,

the upper surface has a recess opposite the hose,

the fixing member has a hole penetrating from the upper surface to the lower surface at the recess.

5. An indoor unit as claimed in claim 1,

further comprises a float switch for detecting the water level of the drain pan,

the fixing member also has a holding portion that holds the float switch.

6. An indoor unit as claimed in claim 5,

the holding portion has an arm extending on the drain pan side with respect to the lower surface and holding the float switch at a leading end,

the arm has an inclined surface connected to the upper surface.

7. The indoor unit according to any one of claims 1 to 6,

the fixing member is made of a resin material.

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