Indoor unit of an air conditioner

Abstract

To allow an electric cord extending from a heat exchange chamber side to an electric component box in a blower chamber to be easily handled when performing maintenance work.SOLUTION: An indoor unit for an air conditioner includes an indoor unit casing 10, the inside of which is partitioned into a heat exchange chamber having a heat exchanger and a blower chamber having a blower with a partition plate. In a side face of the indoor unit casing, a first opening part 40 opening toward the heat exchange chamber and a second opening part 50 opening toward the blower chamber are formed. In the blower chamber, an electric component unit 52 is arranged along the second opening part 50. The electric component unit 52 is connected to an electric component arranged in the heat exchange chamber via electric wiring 44. In the side face between the first opening part 40 and the second opening part 50, a recessed part 131 is formed which is recessed toward the inside of the indoor unit casing 10. The recessed part 131 is formed as a wiring passage part for the electric wiring 44 extending from the heat exchange chamber to the electric component box.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to an indoor unit of an air conditioner, and more particularly to the arrangement of electrical wiring (hereinafter also referred to as an electrical cord) of electrical components (such as a drain pump and a float switch) of the indoor unit.

Background Art

[0002] For example, a ceiling-embedded duct type air conditioner includes an indoor unit housing suspended by suspension bolts or the like in a space above the ceiling. Since the space above the ceiling may be narrow in the height direction, for example, the indoor unit housing is formed as a flat rectangular parallelepiped. The inside of the indoor unit housing is partitioned by a partition plate. The partition plate partitions the inside of the indoor unit housing into a heat exchange chamber in which a heat exchanger is housed and a blower chamber in which a blower is housed. In the blower chamber, for example, an electrical component box is provided. The electrical component box houses, for example, a control board that controls electrical components such as a drain pump and a float switch of the indoor unit, and a power supply terminal block to which an external power supply is connected to supply power to each component.

[0003] The indoor unit housing has, for example, a top panel, a bottom panel, a left side panel, and a right side panel, a part of the front and rear or the bottom panel is open as an air flow port, and an air suction port to which an air suction duct is connected is provided in a part of the rear or the bottom panel on the blower chamber side, and an air blowout port to which an air blowout duct is connected is provided on the front surface on the heat exchange chamber side.

[0004] At the bottom of the heat exchange chamber, a drain pan for receiving condensed water generated during cooling operation is arranged. Accordingly, a drain pump for draining the condensed water accumulated in the drain pan and a float switch for detecting the water level of the condensed water are provided in the heat exchange chamber.

[0005] For example, as described in Patent Documents 1 and 2, an opening for maintenance is formed in the side panel of the heat exchange chamber, and the drain pump and the float switch are attached to the back side of a detachable cover plate that covers the opening so as to be easily removed from the inside of the heat exchange chamber during maintenance.

[0006] These drain pump and float switch are connected to a control board etc. inside the electrical component box via an electric cord that transmits power and control signals. Since the electrical component box has heat-generating components inside, it is arranged in a blower chamber with good ventilation.

[0007] Therefore, in the invention described in Patent Document 1, wiring insertion holes are provided in the partition plate, and each electric cord of the drain pump and the float switch is passed through the wiring insertion holes and led to the blower chamber side, and is connected to a control board etc. inside the electrical component box from the back side of the electrical component box.

[0008] Therefore, during maintenance such as replacing the drain pump and the float switch, it is necessary to work with a hand inside the indoor unit housing, and there are problems that the visibility of the wiring and the workability are poor, and the maintenance work takes time.

[0009] On the other hand, in the invention described in Patent Document 2, the electric cords of the drain pump and the float switch are wired along the outside (outer surface) of the side panel without passing through the inside of the indoor unit housing and are connected to the control board inside the electrical component box. According to this, the visibility of the wiring is good, and it is no longer necessary to work with a hand inside the indoor unit housing.

[0010] In the invention described in Patent Document 2, the outer wiring portion where the electric cord is arranged along the outside of the side panel is covered with a wiring cover portion after the maintenance is completed, and thereby the electric cord is pressed against the outer wiring portion. However, as a problem, during the work, it is necessary to bundle the electric cords with a bundling tool etc. so that they do not come apart and hold them on the outer wiring portion.

[0011] In addition, since the wiring cover portion covers the outer wiring portion from the outside thereof, it is formed in a trapezoidal shape with a convex bulge on the outside. Therefore, a part of the side panel of the indoor unit housing becomes convex due to the wiring cover portion, which may interfere with, for example, connecting a refrigerant pipe routed from the outdoor unit side to the indoor unit housing.

[0012] In addition, the wiring cover portion is formed in a trapezoidal shape that bulges outward across the adjacent portions of the lid of the electrical component box and the pipe cover. However, since the processing is by sheet metal, there are problems such as high cost.

Prior Art Documents

Patent Documents

[0013]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0014] Therefore, an object of the present invention is to facilitate maintenance work in an indoor unit of an air conditioner in which the interior of the indoor unit housing is partitioned by a partition plate into a heat exchange chamber having a heat exchanger and a blower chamber having a blower.

Means for Solving the Problems

[0015] To solve the above problems, the present invention provides an indoor unit housing whose interior is partitioned by a partition plate into a heat exchange chamber having a heat exchanger and a blower chamber having a blower. On the side surface of the indoor unit housing, a first opening opened toward the heat exchange chamber and a second opening opened toward the blower chamber are formed. In the blower chamber, an electrical component unit is arranged along the second opening. The electrical component unit is connected to an electrical component arranged in the heat exchange chamber by electrical wiring. In the indoor unit of the air conditioner. On the side surface, a recess that is recessed toward the inside of the indoor unit housing is formed between the first opening and the second opening, which is a feature.

Advantages of the Invention

[0016] According to the present invention, in an indoor unit of an air conditioner in which the inside of the indoor unit housing is partitioned into a heat exchange chamber and a blower chamber by a partition plate, maintenance work can be easily performed.

Brief Description of the Drawings

[0017]

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Embodiments for Carrying Out the Invention

[0018] Next, some embodiments included in the present invention will be described with reference to FIGS. 1 to 16, but the present invention is not limited thereto.

[0019] First, referring to FIGS. 1 to 4, the ceiling-embedded duct type air conditioner of the present invention includes an indoor unit housing 10 installed in the ceiling space 9 of a house. Since the space in the ceiling space 9 is narrow in the height direction, the indoor unit housing 10 has a flat rectangular parallelepiped shape. At the four corners of the indoor unit housing 10, suspension hooks 101 for suspending the indoor unit housing 10 by suspension bolts 101a, for example, from a floor slab 91 are provided.

[0020] The indoor unit housing 10 includes a top panel 11, a bottom panel 12, a left side panel (the left side panel in FIG. 2) 13L, and a right side panel (the right side panel in FIG. 2) 13R. The front surface (left side in FIG. 2) 14 and the rear surface (right side in FIG. 2) 15 of the indoor unit housing 10 are open as air circulation ports. When there is no need to distinguish between the left side panel 13L and the right side panel 13R, they are collectively referred to as the side panel 13.

[0021] As shown in FIG. 3, the interior of the indoor unit housing 10 is partitioned into left and right by a partition plate 16. On the front surface 14 side, a heat exchange chamber 20 is allocated, and on the rear surface 15 side, a blower chamber 30 is allocated. Referring to FIG. 12, the left side panel 13L and the right side panel 13R are respectively fixed to the left end portion 16L and the right end portion 16R of the partition plate 16.

[0022] In the heat exchange chamber 20, a heat exchanger 21 and a drain pan 22 are provided. In the blower chamber 30, a blower 31 is provided. A sirocco fan is used for the blower 31. In the present embodiment, as shown in FIG. 12, the number of blowers 31 is two, but it may be one or three or more.

[0023] According to the present embodiment, by operating the blower 31, indoor air is sucked from the rear surface 15 of the indoor unit housing 10, and the conditioned air heat-exchanged by the heat exchanger 21 is blown out from the front surface 14 of the indoor unit housing 10.

[0024] Therefore, an air suction duct 80 is connected to the rear surface 15 of the indoor unit housing 10 at the air suction port 151, and an air blowing duct 81 is connected to the front surface 14 of the indoor unit housing 10 at the air blowing port 141. As shown in FIG. 2, a suction grill 152 having an air filter is provided at the air suction port 151.

[0025] Referring to FIGS. 5 and 6 together, on the left side panel 13L, for maintenance, a first opening 40 opened toward the heat exchange chamber 20 and a second opening 50 opened toward the blower chamber 30 are formed side by side with a predetermined interval.

[0026] A first cover plate 41 is detachably attached to the first opening 40, and a second cover plate 51 is also detachably attached to the second opening 50. Both the first cover plate 41 and the second cover plate 51 are made of a metal plate and are screwed to the peripheral edges of the corresponding openings 40, 50 as shown in FIG. 4.

[0027] As shown in FIG. 7, on the back surface of the first cover plate 41, a drain pump 42 for draining the condensed water accumulated in the drain pan 22 and a float switch 43 for detecting the water level of the condensed water accumulated in the drain pan 22 are attached. According to this, by removing the first cover plate 41, the drain pump 42 and the float switch 43 can be taken out from the heat exchange chamber 20.

[0028] An electric cord 44P is drawn out from the drain pump 42, and an electric cord 44F is also drawn out from the float switch 43. These electric cords 44P and 44F may be collectively referred to as the electric cord 44.

[0029] The electric cord 44P and the electric cord 44F each appear to be one, but in this embodiment, for the electric cord 44P of the drain pump 42, an electric cord in which two lead wires with an outer diameter of 0.8 mm are inserted into a protective tube with an inner diameter of 5 mm and a wall thickness of 0.5 mm is used. Also, for the electric cord 44F of the float switch 43, an electric cord in which two lead wires with an outer diameter of 0.5 mm are inserted into a protective tube with an inner diameter of 5 mm and a wall thickness of 0.5 mm is used.

[0030] The electrical component unit 52 is arranged along the second opening 50 in the blower chamber 30. Referring to FIG. 8, the electrical component unit 52 of this embodiment is composed of an electrical component box 521, a control board 522, a terminal block 523, etc. accommodated in this electrical component box 521. The electrical component box 521 has a box shape with one side open and is closed by the second cover plate 51. Since heat-generating components are mounted in the electrical component box 521, it is arranged in the blower chamber 30 with good ventilation.

[0031] The electric cord (electrical wiring) 44 (44P, 44F) drawn out from the drain pump 42 and the float switch 43 is routed from the heat exchange chamber 20 side to the blower chamber 30 side and connected to a predetermined terminal of the electrical component unit 52. In this embodiment, the electric cord 44 is guided into the electrical component box 521 without protruding the left side panel 13L.

[0032] Therefore, on the left side panel 13L, a recess 131 that is recessed toward the inside of the indoor unit housing 10 is formed in the intermediate wall 130 between the first opening 40 and the second opening 50. The recess 131 has a shape like a groove (hereinafter also referred to as a groove shape) that connects the first opening 40 and the second opening 50. An electric cord 44 drawn from the drain pump 42 and the float switch 43 is arranged in the recess 131 so as to fit within the recess 131 (hereinafter, the recess 131 is also referred to as a wiring passage portion).

[0033] In this embodiment, the first opening 40 has a first recess 401 (see FIG. 11) in which a part of the edge forming the opening is recessed toward the inside of the indoor unit housing 10. The first recess 401 is connected to one end of the groove-shaped recess.

[0034] Also, the second opening 50 has a second recess 501 (see FIG. 5) in which a part of the edge forming the opening is recessed toward the inside of the indoor unit housing 10. The second recess 501 is connected to the other end of the groove-shaped recess.

[0035] In order for the electric cord 44 to fit within the above-mentioned recess (wiring passage portion) 131, the depth of the recess 131 is preferably greater than the outer diameter of the protective tube of the electric cord 44. Also, the groove width W (longitudinal width, see FIG. 6) of the wiring passage portion 131 is preferably at least twice the outer diameter of the protective tube so that at least two electric cords 44P, 44F can be arranged side by side for wiring.

[0036] According to this recess (wiring passage portion) 131, when maintaining the drain pump 42 and the float switch 43, the visibility of the electric cord 44 is good. Therefore, for example, it is possible to prevent misconnection or misidentification between the electric cord 44P of the drain pump 42 and the electric cord 44F of the float switch 43. Also, there is no need to put a hand into the indoor unit housing 10 for work.

[0037] Also, since the electric cord 44 can be placed along the recess (wiring passage portion) 131, there is no need to bundle and hold the electric cord 44 with a bundling tool or the like so that the electric cord 44 does not become loose during maintenance work.

[0038] Except during maintenance, the recess (wiring passage portion) 131 is covered by a wiring cover. According to this embodiment, as shown in FIG. 3, the recess (wiring passage portion) 131 is covered approximately half by the wiring cover portion 411 formed at the right end of the first cover plate 41 and the wiring cover portion 511 formed at the left end of the second cover plate 51. However, either one of the wiring cover portion 411 or the wiring cover portion 511 may be formed larger to cover the other portion and cover the wiring passage portion 131.

[0039] In any case, since the groove-shaped wiring passage portion 131 is formed in the side panel 13, an electric cord can be stored in the wiring passage portion 131 while the wiring cover has a flat plate shape. Therefore, the first cover plate 41 can be created by punching from a flat metal plate including its wiring cover portion 411. Similarly, the second cover plate 51 can be created by punching from a flat metal plate including its wiring cover portion 511. Thus, sheet metal processing for adding unevenness or the like to the first cover plate 41 and the second cover plate 51 is not required.

[0040] Also, when storing the electric cord 44 in the recess (wiring passage portion) 131, as shown in FIGS. 7 and 8, it is preferable to attach an elastic body 135 as a cord retainer to the electric cord 44. In this case, the elastic body 135 preferably has a volume larger than the volume of the space surrounded by the wiring cover portions 411, 511 and the recess (wiring passage portion) 131. Thereby, the elastic body 135 is compressed by the wiring cover portions 411, 511 covering the recess (wiring passage portion) 131, and the electric cord can be held by the elastic body 135.

[0041] In this embodiment, the electric cord 44 is inserted into the elastic body 135. However, in order to save the trouble of insertion, the elastic body 135 may be provided on either one or both sides of the wiring passage portion 131 side and the wiring cover portions 411, 511 side to sandwich the electric cord 44.

[0042] Although not shown in the drawings, the heat exchanger 21 is provided with a thermistor as a temperature detection element. The electrical cord of this thermistor may also be connected to the control board in the electrical component box 521 via the wiring passage portion 131 together with the above-described electrical cord 44. Incidentally, as the electrical cord of the thermistor, for example, an electrical cord in which a lead wire having an outer diameter of 1.3 mm is inserted through a protective tube having an inner diameter of 3.5 mm is used.

[0043] Next, as shown in FIG. 9, on the water receiving surface (upper surface) side of the drain pan 22 for receiving the condensed water dripping from the heat exchanger 21, a condensed water storage portion 221 for collecting the condensed water by an inclined surface is provided. A drain pump 42 and a float switch 43 are arranged in the condensed water storage portion 221. When the water level of the condensed water becomes a certain level or higher, it is detected by the float switch 43, and the drain pump 42 operates to drain the condensed water.

[0044] As described above, the drain pump 42 and the float switch 43 are provided on the back surface side of the first cover plate 41. By attaching the first cover plate 41 to the first opening 40, the drain pump 42 and the float switch 43 are arranged in the condensed water storage portion 221.

[0045] Note that a drain port 222 for draining the condensed water is provided in the condensed water storage portion 221 separately from the drain pump 42. This drain port 222 is closed by a plug (not shown) except when draining the condensed water from the condensed water storage portion 221 during maintenance work, for example.

[0046] Condensed water is stored in the condensed water storage part 221. There may be dust deposits (hereinafter also referred to as dust) formed by the accumulation and growth of minute dust contained in the circulated indoor air in the condensed water storage part 221. The dust deposits are formed, for example, by the deposition of dust adhering to the heat exchanger 21 and the drain pan 22. This dust flows down along the inclined surface together with the condensed water, which causes the area near the condensed water storage part 221 to become dirty. Therefore, the area near the condensed water storage part 221 needs to be cleaned regularly or irregularly. To remove the dirt near the condensed water storage part 221, it is necessary to remove the drain pan 22 from the bottom of the heat exchange chamber 20, but it is not easy to remove the drain pan 22 from the bottom of the heat exchange chamber 20.

[0047] Therefore, as shown in FIGS. 10 and 11, the indoor unit housing 10 according to the present embodiment includes a dust collection part 60 disposed in the condensed water storage part 221 of the drain pan 22. The dust collection part 60 collects dust that flows down along the inclined surface together with the condensed water. The dust collection part 60 can enter and exit the heat exchange chamber 20 through the first opening 40. The dust collected by the dust collection part 60 pulled out from the first opening 40 can be easily removed. This facilitates the cleaning of the condensed water storage part 221 where dirt tends to accumulate.

[0048] The dust collection part 60 is formed, for example, in a box shape. The dust collection part 60 includes a back frame 610, a left side frame 620 that is connected to the left side part 611 of the back frame 610 at a substantially right angle in FIG. 10, a right side frame 630 that is connected to the right side part 612 of the back frame 610 at a substantially right angle so as to face the same direction as the left side frame 620 in FIG. 10, and a middle bottom frame 640. The middle bottom frame 640 is provided obliquely from the upper side part 613 of the back frame 610 between the lower corner parts (the lower corners on the opposite side of the back frame 610) 621, 631 of the left side frame 620 and the right side frame 630.

[0049] Each of the back frame 610, the left side frame 620, the right side frame 630, and the middle bottom frame 640 is provided with a fine mesh capable of collecting dust contained in the condensed water. A wire mesh or a resin mesh is preferably used for this mesh, but a filter such as a metal perforated plate or a resin porous sheet may also be used.

[0050] The dust collection part 60 is arranged in the condensed water storage part 221 with the middle bottom frame 640 facing the direction in which the condensed water flows. The drain pump 42 and the float switch 43 are arranged, for example, on the downstream side of the back frame 610 or the left side frame 620 of the dust collection part 60.

[0051] As another form, the middle bottom frame 640 may be arranged flatly along the bottom surface of the dust collection part 60 instead of obliquely, and the drain pump 42 and the float switch 43 may be arranged inside the dust collection part 60.

[0052] In any case, the dust collection part 60 can collect the dust contained in the condensed water, and since the dust collection part 60 can enter and exit through the first opening 40, the drain pan 22, which was difficult to clean, can be easily cleaned to maintain cleanliness. Also, clogging of the drain pump 42 can be prevented.

[0053] Next, with reference to FIGS. 12 to 15, the fixture 70 as a fixing means for the heat exchanger 21 will be described.

[0054] The heat exchanger 21 is of the fin-tube type. In order to increase the heat exchange area with air, the heat exchanger 21 is housed in the heat exchange chamber 20 in an obliquely inclined state. According to the present embodiment, the heat exchanger 21 is obliquely arranged so as to have an upward gradient from the partition plate 16 side toward the air outlet 141 side on the front surface 14 of the indoor unit housing 10.

[0055] In this case, in order not to generate air that does not pass through the heat exchanger 21, the lower end side of the heat exchanger 21 is in close contact with the drain pan 22, and the upper end side of the heat exchanger 21 is arranged to be in close contact with the heat insulating material 201 provided around the air outlet 141. However, for example, if excessive vibration is applied during the conveyance of the product including conveyance in the factory, the heat exchanger 21 may be bent or distorted, and a gap may be formed at at least one of the upper end and the lower end of the heat exchanger 21, and there is a possibility that an air flow that is not heat-exchanged and passes through the gap may occur.

[0056] Therefore, the indoor unit casing 10 according to the present embodiment includes a fixture 70 that presses a part of the heat exchanger 21 on the partition plate 16 side from above as a fixing means for the heat exchanger 21 to the partition plate 16.

[0057] As shown in FIG. 15, the fixture 70 includes a U-shaped frame 71 made of a metal material including a pair of left and right leg plates 711, 711 and a connecting plate 713 spanned between one ends of the leg plates 711, 711, and a buffer member 72 attached to the connecting plate 713.

[0058] A synthetic resin material such as FPE (foamed polyethylene) is preferably used for the buffer member 72. Further, the buffer member 72 is preferably attached to the central portion of the connecting plate 713 along the length direction of the connecting plate 713 with a length shorter than the length of the connecting plate 713 so that the ventilation resistance is minimized. Examples of the method of attaching the buffer member 72 to the connecting plate 713 include a method using an adhesive and a method of injection molding on the connecting plate 713 in a mold. In the present embodiment, the buffer member 72 is formed in a prismatic shape, but it may be cylindrical.

[0059] At the other ends of the leg plates 711, 711, screw fixing pieces 712, 712 bent at right angles in a direction away from each other are formed as attachment means for the partition plate 16.

[0060] A preferred attachment position of the fixture 70 to the partition plate 16 will be described. Since a plurality of blowers (sirocco fans) 31, two in this embodiment, are installed in the blower chamber 30, two air outlets 161, 161 corresponding to the respective blowers 31 are formed in the partition plate 16. The fixture 70 is preferably disposed between the air outlets 161, 161 in order to reduce the ventilation resistance to the air flow blown out from the air outlets 161, 161.

[0061] The fixture 70 is screwed to the partition plate 16 in such a manner that the upper surface side of the buffer material 72 with the corners facing the top surface panel 11 side of the heat exchanger 21 is brought into contact therewith, and the heat exchanger 21 is pressed from above so that the lower end side of the heat exchanger 21 is in close contact with the drain pan 22. Thereby, even if vibration or impact is applied to the heat exchanger 21, it is possible to prevent a gap from occurring between the lower end of the heat exchanger 21 and the drain pan 22 and between the upper end of the heat exchanger 21 and the heat insulating material 201.

[0062] Thereby, it is possible to eliminate the leakage of the air flow that is not heat-exchanged, and to prevent dew from flying and performance degradation due to the breakdown of the path balance.

[0063] Incidentally, the maintenance of the electrical component unit 52 often involves work in a dark space such as in the ceiling space, and in that case, lighting is required. Although the use of a flashlight is common, every time the work location changes, it is necessary to adjust the position where the flashlight is illuminated. In addition, since the work space is narrow, it is often difficult to place the flashlight at an appropriate position, which makes the maintenance difficult.

[0064] Therefore, in the present embodiment, as shown in FIG. 8, lighting means 82 for illuminating the electrical component unit 52 is provided, and switch means 83 for detecting the opening and closing of the second cover plate 51 of the electrical component box 521 in the electrical component box 521 and turning on and off the power supply to the lighting means 82 is provided, and the lighting means 82 is turned on when the second cover plate 51 is open. The second cover plate 51 is also the cover plate of the second opening 50.

[0065] An LED (light emitting diode) may be used for the lighting means 82. In the present embodiment, a spherical LED is used as the light emitting part. In FIG. 8, the portion indicated by the solid line indicates the visible portion, and the portion indicated by the dotted line indicates the portion hidden by the side panel 13. A microswitch is preferably adopted for the switch means 83. The actuator of the microswitch is switched between the on position and the off position by the second cover plate 51.

[0066] For example, when the second cover plate 51 is attached to the second opening 50, the actuator is pushed by the second cover plate 51 to switch off the power supply to the LED, and when the second cover plate 51 is removed, the actuator returns to the switched-on position to switch on the power supply to the LED. FIG. 16 shows an image diagram of performing maintenance work with the interior of the electrical component box 521 brightened by the lighting means 82.

[0067] Note that instead of the microswitch, a reed switch, a photoelectric switch, or a pyroelectric sensor can also be used. Further, as a preferred embodiment, a secondary battery is used for the power supply of the lighting means 82 and is charged during the operation of the air conditioner, so that lighting can be used even when the power supply of the air conditioner itself is turned off during maintenance.

[0068] Furthermore, the lighting means 82 may be provided not only in the electrical component box 521 but also in at least one of the heat exchange chamber 20 and the blower chamber 30, and such an embodiment is also included in the present invention. That is, the lighting means 82 and the switch means 83 are applied to an embodiment in which maintenance openings are provided in the heat exchange chamber 20 and the blower chamber 30, and an opening and closing lid similar to the second cover plate 51 is attached to the opening. In this case, a switch that does not require an actuator that is turned on and off by the opening and closing operation of the opening and closing lid is used for the switch means 83. In addition, although the indoor unit housing 10 in the present embodiment is a ceiling-embedded duct type, the lighting means 82 and the switch means 83 may also be applied to a ceiling-embedded type electrical component box.

[0069] As described above, the present invention has been described using embodiments, but the technical scope of the present invention is not limited to the description of the above embodiments. Any changes or improvements made by those skilled in the art in addition to the above embodiments are also included in the technical scope of the present invention.

Explanation of Reference Numerals

[0070] 10 Indoor unit housing 11 Top panel 12 Bottom panel 13 Side panel 130 Intermediate wall 131 Wiring passage part 135 Elastic body 14 Front surface 141 Air outlet 15 Rear surface 151 Air inlet 152 Suction grill 16 Partition board 161 Air supply port 20 Heat exchange chamber 201 Heat insulating material 21 Heat exchanger 22 Drain pan 221 Condensate storage part 222 Drain port 30 Blower chamber 31 Blower (sirocco fan) 40 First opening 41 First cover plate 411 Wiring cover part 42 Drain pump 43 Float switch 44(44P,44F) Electric cord 50 Second opening 51 Second cover plate 511 Wiring cover part 52 Electrical component unit 521 Electrical component box 522 Control board 523 Terminal block 60 Dust collection part 610 Rear frame 620 Left side frame 630 Right side frame 640 Middle bottom frame 70 Fixing means (fastener) 71 U-shaped frame 711 Foot plate 712 Screwing piece 72 Buffer material 82 Lighting means 83 Switch means

Claims

1. An indoor unit housing is provided, which is partitioned by a partition plate inside into a heat exchange chamber having a heat exchanger and a blower chamber having a blower. On the side surface of the indoor unit housing, a first opening opened toward the heat exchange chamber and a second opening opened toward the blower chamber are formed. Inside the blower chamber, an electrical component unit is arranged along the second opening. In the indoor unit of the air conditioner, the electrical component unit is connected to an electrical component arranged in the heat exchange chamber by electrical wiring. The indoor unit of the air conditioner is characterized in that a recess recessed toward the inside of the indoor unit housing is formed between the first opening and the second opening on the side surface.

2. The indoor unit of the air conditioner according to Claim 1, wherein the electrical wiring extending from the heat exchange chamber toward the electrical component unit is arranged in the recess.

3. The indoor unit of the air conditioner according to Claim 1 or 2, wherein the recess is a groove-shaped recess formed so as to connect the first opening and the second opening.

4. The indoor unit of the air conditioner according to Claim 3, wherein a part of the edge forming the opening of the first opening includes a first recess recessed toward the inside of the indoor unit housing, and the first recess is connected to one end of the groove-shaped recess.

5. The indoor unit of the air conditioner according to Claim 3 or 4, wherein a part of the edge forming the opening of the second opening includes a second recess recessed toward the inside of the indoor unit housing, and the second recess is connected to the other end of the groove-shaped recess.

6. The indoor unit of the air conditioner according to any one of Claims 1 to 5, further comprising a first cover plate detachably attached to the first opening and a second cover plate detachably attached to the second opening, and at least one of the first cover plate and the second cover plate has a cover portion covering the recess.

7. The indoor unit of the air conditioner according to Claim 6, wherein an elastic body for pressing the electrical wiring is provided on at least one of the cover portion covering the recess and the recess.

8. A drain pan is disposed at the bottom of the heat exchange chamber, and a drain pump for draining the condensed water accumulated in the drain pan as the electric component and a float switch for detecting the water level of the condensed water are attached to the back surface of the first cover plate. The indoor unit of the air conditioner according to claim 6, characterized in that the electrical wiring passed through the recess is at least the electrical wiring for the drain pump and the electrical wiring for the float switch.

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