CN113614466B

CN113614466B - Indoor unit of air conditioner

Info

Publication number: CN113614466B
Application number: CN201980094509.8A
Authority: CN
Inventors: 横关诚; 吉武伸哲; 渡边英树
Original assignee: Toshiba Carrier Corp
Current assignee: Toshiba Carrier Corp
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2022-08-09
Anticipated expiration: 2039-03-26
Also published as: JP7196284B2; WO2020194555A1; CN113614466A; JPWO2020194555A1

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

For example, in a ceiling-embedded air conditioner, an indoor unit is suspended from the back of the ceiling. The indoor unit includes an air blower, a heat exchanger, and a casing for housing the air blower and the heat exchanger. Further, a drain pan that receives water generated by condensation of the heat exchanger and a drain pump that sends water accumulated in the drain pan to a drain connection port provided in the casing are disposed in the casing.

The drain pump is often fixed to the housing near the side plate by a fixing member, and the connection port is also provided in the side plate. The draining pump and the connecting port are connected through a hose. Since the water accumulated in the drain pan is low in temperature, dew condensation may occur on the surface of the water if the water passes through the hose.

For example, by passing the hose through the drain pump and the fixing member, the width of the casing can be reduced as compared with the case where the hose is arranged laterally. However, in this structure, if water drops due to condensation on the surface of the hose, the water may reach the side plate via the lower fixing member or the like, and may leak out of the housing. The same problem may occur in an indoor unit of an air conditioner other than the ceiling-embedded type.

Documents of the prior art

Patent document

Patent document 1: international patent publication No. 2012/176805

Disclosure of Invention

Technical problem to be solved by the invention

The invention provides an indoor unit, which can prevent water generated by condensation near a drainage pump from leaking to the outside of a shell.

Means for solving the problems

Drawings

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

Fig. 2 is a schematic perspective view illustrating the interior of the indoor unit.

Fig. 3 is a schematic sectional view of the indoor unit.

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

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

Fig. 6 is an enlarged perspective view of 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 elements along line IX-IX in fig. 7.

Fig. 10 is a schematic cross-sectional view of elements along the X-X line in fig. 7.

Detailed Description

One embodiment is described with reference to the accompanying drawings.

Fig. 1 is a perspective view showing an external appearance of an indoor unit 1 according to the present embodiment. Fig. 2 is a schematic perspective view illustrating the interior of the indoor unit 1. Fig. 3 is a schematic sectional view of the indoor unit 1. The indoor unit 1 is disposed indoors, for example, and is connected to an outdoor unit disposed outdoors through a refrigerant pipe. An air conditioner having a refrigeration cycle is configured by an indoor unit 1, an outdoor unit, and a refrigerant pipe.

As shown in fig. 1, the indoor unit 1 includes a casing 2, and a panel 3 covering a lower surface of the casing 2. A plurality of suspension fittings 2a are provided on the outer peripheral surface of the housing 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, an intake port 31, and an outlet port 32. The suction port 31 includes a grill 33 that is removable from the main body 30, and a filter 34 (see fig. 3) disposed inside the grill 33. The air outlet 32 includes a flap 35 openable and closable with respect to the main body 30. Fig. 1 shows a state in which the air outlet 32 is closed by the flap 35.

The internal structure shown in fig. 2 corresponds to a structure in which the panel 3 and a drain pan 50 described later are removed, and the inside of the housing 2 is viewed from below in fig. 1. The casing 2 is formed in a box shape opened on the panel 3 side (upper side in fig. 2). Specifically, the housing 2 includes: a rectangular ceiling plate 20 which becomes an upper surface of the indoor unit 1 when mounted to a ceiling; a 1 st side plate 21 along one short side of the top plate 20; a 2 nd side plate 22 along the other short side of the top plate 20; and a 3 rd side panel 23 along one long side of the top panel 20.

The case 2 further includes a 4 th side plate 24 (see fig. 1) along the other long side of the top plate 20, but the 4 th side plate 24 is omitted in fig. 2, and a part of the heat insulating material 25 disposed along the 4 th side plate 24 is cut. For example, the top plate 20 and the side plates 21 to 24 are made of metal. The heat insulating material 25 can be made of, for example, foamed plastic such as expanded polystyrene.

Inside the case 2, a partition plate 26 is disposed along the longitudinal direction of the case 2. The internal space of the casing 2 is divided into a blowing chamber a and a heat exchange chamber B by a partition plate 26. The blowing chamber a is provided with a blowing device 4. The heat exchanger 5 is disposed in the heat exchange chamber B.

As shown in fig. 3, a drain pan 50 that receives drain water dripping from the heat exchanger 5 is disposed between the heat exchanger 5 and the panel 3. The drain pan 50 can be made of foamed plastic such as foamed polystyrene, for example.

As shown in fig. 2, a drain pump 6 and the like for discharging drain accumulated in the drain pan 50 are disposed between the heat exchanger 5 and the 1 st side plate 21. The 1 st side plate 21 is provided with

connection ports

51a and 51b for connecting pipes through which a refrigerant flows, and a connection port 60 for connecting a pipe for discharging drain water. The

connection ports

51a, 51b are connected to the heat exchanger 5. The connection port 60 is connected to the drain pump 6.

The blower 4 includes a fan motor 40, a pair of fan units 41a and 41b, and a rotary shaft 42. The fan units 41a and 41b are disposed to face each other with the fan motor 40 interposed therebetween. The rotary shaft 42 is rotatably supported by the fan motor 40, and both ends thereof extend toward the fan units 41a and 41b, respectively. The number of fan units included in the blower 4 is not limited to 2.

As shown in fig. 2 and 3, the fan units 41a, 41b include a sirocco fan 43 connected to the rotation shaft 42, and a fan housing 44 that houses the sirocco fan 43. The fan housing 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 is opposed to the heat exchanger 5.

As shown in fig. 3, the heat exchanger 5 includes a plurality of plate-like fins 52 and a plurality of heat transfer tubes 53 through which the refrigerant flows. Each fin 52 is inclined so that one end on the blower chamber a side is positioned lower (in the direction toward the panel 3) than the other end. The plurality of fins 52 are arranged in the longitudinal direction of the indoor unit 1 (the direction from the 1 st side plate 21 toward the 2 nd side plate 22). The plurality of heat transfer pipes 53 extend in the longitudinal direction of the indoor unit 1, and penetrate the fins 52.

The channels of the heat exchanger 5 including the heat transfer tubes 53 are connected to the

connection ports

51a and 51 b. That is, the refrigerant supplied from one of the

connection ports

51a and 51b passes through the heat transfer pipes 53 and is then discharged to the other of the

connection ports

51a and 51 b.

The blowing chamber a communicates with the suction port 31. When the sirocco fan 43 is rotated, air is taken into the air blowing chamber a through the air inlet 31. Further, the air is sucked into the inside of the sirocco fan 43 through the air intake hole 45, and is blown out toward the heat exchanger 5 from the nozzle portion 46. The heat exchanger 5 changes the air into heat-exchanged air of cold air or warm air. The heat-exchanged air is sent out to the space to be air-conditioned through the air outlet 32.

As shown in fig. 2, an electric unit 27 is disposed near the 1 st side plate 21. The electrical unit 27 includes a 1 st electrical component box 27a and a 2 nd electrical component box 27 b. The 1 st electric component box 27a is located outside the 1 st side plate 21. The 2 nd electric component box 27b is located between the blower 4 and the 1 st side plate 21.

Each of the

electric component boxes

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

Fig. 4 is a schematic side view of the indoor unit 1 shown in fig. 1, as viewed from the 1 st side plate 21 side. The 1 st side plate 21 is provided with the

connection ports

51a, 51b, and 60, the 1 st electrical component box 27a, and the like.

In the example of fig. 4, the 1 st electrical component box 27a is located near the 3 rd side plate 23, and the

connection ports

51a and 51b are located near the 4 th side plate 24. The connection port 60 is located between the 1 st electrical component box 27a and the

connection ports

51a and 51 b.

A flange 60a is provided at the root of the connection port 60. The screw S1 is inserted into the female screw of the 1 st side plate 21 through the through hole provided in the flange 60a, and the connection port 60 is connected to the 1 st side plate 21. Further, the 1 st side plate 21 is provided with through holes into which the 3 screws S2 are inserted below the flange 60 a. Each screw S2 connects a mount 7 described later to the 1 st side plate 21.

A 1 st cover 21a detachable from the 1 st side plate 21 is provided near the

connection ports

51a and 51 b. The 1 st electrical component box 27a is provided with a 2 nd lid 21b that is detachable from the 1 st electrical component box 27 a. Maintenance and the like for the elements disposed in the vicinity of the 1 st side plate 21 can be performed through an inspection opening that appears by removing the

cover bodies

21a, 21b, and a lower opening of the case 2 that appears by removing the panel 3 and the drain pan 50.

Fig. 5 is a schematic perspective view showing the inside of the casing 2 near the drain pump 6. In fig. 5, piping and the like for connecting the top plate 20, the 4 th side plate 24, the heat insulating material 25, the heat exchanger 5, and the

connection ports

51a and 51b to the heat exchanger 5 are omitted.

The drain pump 6 is fixed to the 1 st side plate 21 by a fixing member 7. The fixing member 7 is made of, for example, resin, and covers the upper portion 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 fixing member 7, for example, ABS resin or PS resin can be used.

The drain pan 50 has a concave portion 54 at a position opposite to the drain pump 6. The recess 54 is provided with a drain port 55. The drain port 55 is closed by a plug body 56.

The drain pump 6 includes a main body 61, a suction port 62 at a lower end of the main body 61, and a drain hose 63 through which water sucked from the suction port 62 passes. The suction port 62 is located in the recess 54. The drain hose 63 extends from the main body 61 in a direction away from the 1 st side plate 21, then bends upward, and further bends toward the 1 st side plate 21. A connection port 60 is attached to the front end of the drain hose 63. When the drain pump 6 is operated, the water accumulated in the drain pan 50 is sucked through the suction port 62, and the water is sent to the connection port 60 through the drain hose 63.

The inner surface of the 1 st side plate 21 is covered with a plate-like heat insulating material 28. The heat insulating material 28 may be made of, for example, foamed plastic such as expanded polystyrene. The heat insulating material 28 has a rectangular opening 28a through which the fixing member 7 passes, a circular opening 28b through which a sleeve 60b (see fig. 6) of the connection port 60 passes, and a pair of

circular openings

28c and 28d through which pipes connecting the

connection ports

51a and 51b and the heat exchanger 5 pass. In addition, the 1 st side plate 21 is also formed with openings opposed to the

openings

28b, 28c, 28 d.

In the example of fig. 5, the float switch 8 is disposed above the concave portion 54 of the drain pan 50. Although not shown, the float switch 8 further includes a control circuit and a wiring for outputting the water level information of the drain pan 50 to the electric unit 27. The water level information may be a signal output to the electric unit 27 according to the water level of the drain pan 50 rising to a predetermined position. Further, 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, the electric unit 27 abnormally stops the indoor unit 1 when it is determined that the water level of the drain pan 50 has risen to a predetermined position based on the water level information.

Fig. 6 is an enlarged perspective view of 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 elements along line IX-IX in fig. 7. Fig. 10 is a schematic cross-sectional view of elements along the X-X line in fig. 7. In fig. 7 to 10, a part of the drain hose 63 is omitted.

As shown in the figures, the fixing member 7 has a 1 st end portion 7a, a 2 nd end portion 7b, a 3 rd end portion 7c opposite to the 2 nd end portion 7b, and a 4 th end portion 7d opposite to the 1 st end portion 7 a. The 1 st end 7a is opposite to the 1 st side plate 21. The 2 nd end 7b is opposed to the partition plate 26. As shown in fig. 7, the 2 nd end 7b extends perpendicularly with respect to the 1 st end 7a and is gently bent at the midsection. The 3 rd end portion 7c extends perpendicularly with respect to the 1 st end portion 7a without being bent.

The 1 st end 7a is provided with 3 internal threads 70. To these

internal threads

70, 3 screws S2 shown in fig. 4 are screwed, respectively. Thereby, the fixing member 7 is coupled to the 1 st side plate 21.

The mount 7 has an upper surface F1 opposite to the drain hose 63, and a lower surface F2 opposite to the drain hose 6. The upper surface F1 has a circular 1 st

convex portion

71 and 32 nd convex portions 72 arranged around the 1 st convex portion 71.

As shown in fig. 9, the main body 61 of the drain pump 6 is positioned below the 1 st convex portion 71. Between the main body 61 and the lower surface F2 of the mount 7, there is a gap. The drain pump 6 has 3 mounting portions 64 extending from the main body 61 to the 2 nd convex portion 72. The front end of the mounting portion 64 contacts the lower surface F2 below the 2 nd projection 72.

As shown by the dotted line in the 2 nd convex portion 72 on the left side in fig. 7 and 8, the 2 nd convex portion 72 is provided with an internal thread 72a that opens to the lower surface F2. The mounting portion 64 has a through hole at its distal end, and a screw S3 is inserted into the through hole from below and the screw S3 is screwed into the female screw 72 a. The other 2 nd projecting portion 72 and the mounting portion 64 are similarly coupled by the screw S3. Thereby, the drain pump 6 and the fixing member 7 are fixed to each other.

As shown in fig. 10, in addition to the respective

convex portions

71, 72, the upper surface F1 is inclined at an angle θ 1 (acute angle) with respect to the horizontal direction so that the edge on the 4 th end portion 7d side is located further below in the gravity direction with respect to the edge on the 1 st end portion 7a side. From other points of view, the upper surface F1 is inclined so as to descend toward the drain pan 50 side as it goes away from the 1 st side plate 21.

As shown in fig. 6 and 7, the upper surface F1 is provided with a 1 st rib 73a along the 1 st end 7a, a 2 nd rib 73b along the 2 nd end 7b, and a 3 rd rib 73c along the 3 rd end 7 c. The ribs 73a to 73c each protrude upward from the upper surface F1.

The 2 nd rib 73b is connected to one end of the 1 st rib 73 a. The 3 rd rib 73c is connected to the other end of the 1 st rib 73 a. As shown in fig. 5, in a state where the mount 7 is attached to the 1 st side plate 21, the 1 st rib 73a linearly extends along the 1 st side plate 21 inside the opening 28a of the heat insulator 28. The 2 nd and 3

rd ribs

73b and 73c extend in a direction away from the 1 st side plate 21.

As shown in fig. 6, the upper surface F1 has a recessed portion 74 opposed to the drain hose 63. The recess 74 is also opposed to the sleeve 60b projecting from the flange 60 a. The concave portion 74 is, for example, a gently curved surface. The 1 st rib 73a is recessed in accordance with the shape of the recess 74.

As shown in fig. 7 and 9, a hole 75 penetrating from the upper surface F1 to the lower surface F2 is provided in the vicinity of the boundary between the concave portion 74 and the 1 st convex portion 71. In the recess 74, the upper surface F1 is inclined at an angle θ 2 (acute angle) so that the edge on the hole 75 side is located further downward with respect to the edge on the 1 st end 7a side. The angle θ 2 may be the same as or different from the angle θ 1.

The fixture 7 further includes a holding portion 76 for holding the float switch 8. In the example of fig. 7 to 10, the holding portion 76 has an arm 77 extending from the 4 th end portion 7d, and a notch 78 provided at a front end 77a of the arm 77.

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 tip end 77a of the arm 77 by a pair of nuts N1, N2. When the water level of the drain pan 50 rises, the float 81 rises along with the water surface. The water level information corresponding to the position of the float 81 is output to the electrical unit 27 as described above.

The arm 77 extends further toward the drain pan 50 side than 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 portions inclined at different angles, as shown in fig. 10, for example. The angles of the plurality of portions may be larger than the angle θ 1. As another example, the inclined surface F3 may be inclined at a certain angle as a whole, or may be a curved surface.

The 3 rd rib 73c extends to the vicinity of the tip 77 a. Further, the arm 77 has a 4 th rib 79 opposite to the 3 rd rib 73 c. The inclined surface F3 is sandwiched between the 3 rd rib 73c and the 4 th rib 79.

In the above configuration, at least a part of the water condensed on the surface of the drain hose 63 falls on the upper surface F1 of the anchor 7. In the present embodiment, the upper surface F1 is inclined inward of the housing 2, and therefore the water falling on the upper surface F1 flows in a direction away from the 1 st side plate 21. For example, the water flows from the upper surface F1 to the inclined surface F3 of the arm 77, and falls from the front end 77a into the drain pan 50. Alternatively, water falling to the upper surface F1 flows into the recess 74 and falls through the hole 75 into the drain pan 50.

If the water falling on the upper surface F1 flows toward the 1 st side plate 21, the water may leak from the connection portion between the 1 st side plate 21 and the panel 3 or the like to the outside of the indoor unit 1, or dew condensation may occur on the inside and outside of the 1 st side plate 21 cooled by the water. Therefore, additional members for preventing water from reaching the 1 st side plate 21 and additional heat insulating materials for preventing the 1 st side plate 21 from being cooled are required, which increases the manufacturing cost.

On the other hand, in the configuration of the present embodiment, since the water falling on the upper surface F1 does not flow toward the 1 st side plate 21, the above-described water leakage and dew condensation on the 1 st side plate 21 can be suppressed. Further, since the above-described effect is 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.

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

Further, in the upper surface F1, a recess 74 and a hole 75 facing the drain hose 63 are provided in the vicinity of the 1 st end portion 7 a. With the recess 74 and the hole 75, water falling from the drain hose 63 to the vicinity of the 1 st end portion 7a is easily drained to the lower surface F2 side.

As described above, in the case where the mount 7 is formed of a resin material, heat conduction between the mount 7 and the 1 st side plate 21 can be suppressed as compared with the case where the mount 7 is formed of a metal material. Therefore, the 1 st side plate 21 is not easily cooled, and dew condensation on the inside and outside of the 1 st side plate 21 can be more reliably suppressed.

The structure in the present embodiment has the following effects: not only is water leakage and dew condensation suppressed near the 1 st side plate 21, but also the indoor unit 1 is made compact and the efficiency of the mounting work and the maintenance work is improved.

That is, if the drain hose 63 is disposed so as not to overlap the drain pump 6 and the fixing member 7 in the gravity direction, the width of the casing 2 is increased. In contrast, in the present embodiment, the fixture 7 has a structure in which water does not easily reach the 1 st side plate 21, and therefore the drain hose 63 can be arranged on the fixture 7. This can reduce the width of the housing 2.

In the present embodiment, the holder 7 holds the float switch 8. This eliminates the need to dispose another member for holding the float switch 8, and therefore the number of components can be reduced and the housing 2 can be further made compact.

As shown in fig. 4 and 5, the electrical unit 27 (1 st electrical component box 27a), the

connection ports

51a and 51b for the refrigerant pipe, the drain pump 6, the drain discharge connection port 60, and other elements are provided along the 1 st side plate 21. Therefore, in the mounting work and the maintenance work, the work for these elements can be performed as long as the elements are close to the 1 st side plate 21, and therefore, the work efficiency is improved as compared with the case where these elements are arranged in a dispersed manner.

Further, in the interior of 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 gravity direction. If the elements overlap each other in the direction of gravity, at least a part of the elements are difficult to access, and the efficiency of the mounting work and the maintenance work may be significantly reduced. In contrast, the structure of the present embodiment does not cause such a problem.

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 invention. These new embodiments may be implemented in other various ways, and various omissions, substitutions, and changes may be made without departing from the scope of the invention. These embodiments and modifications 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 the equivalent scope thereof.

For example, the shape of the fixing member 7 is not limited to the shape disclosed in the above embodiment. The specific shape of the anchor 7 can be modified into various shapes according to the shapes of the drain pump 6, the drain hose 63, the 1 st side plate 21, the partition plate 26, the drain pan 50, and the like disposed in the periphery.

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

Description of the reference symbols

1 indoor unit

2 casing

3 Panel

4 air supply device

5 Heat exchanger

21 st to 24 th side plates

6 draining pump

7 fixing piece

8 float switch

60 connecting port

61 Main body of draining pump

62 suction port

63 drainage hose

73a 1 st Rib

73b 2 nd rib

73c rib No. 3

74 recess

75 holes

76 holding part

77 arm

Upper surface of F1 fastener

F2 lower surface of fastener.

Claims

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.