JP2012225524A - Indoor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indoor unit which allows the appearance of a drain pan to be confirmed sufficiently and easily without unit disassembly.SOLUTION: The indoor unit includes an inspection window 4 provided at a position that can visually observe the vicinity of a suction port 3a of a drain pump 3 on a sidewall 2a of a drain pan 2 arranged below a heat exchanger. The inspection window 4 has a double window structure in which an internal window 6 formed of a transparent plate material and an external window 7 formed of the transparent plate material are arranged to face each other and sandwich an air layer 8 therebetween. In a casing 9 of the indoor unit, an opening 10 can visually observe the inspection window 4 is formed.

Description

  The present invention relates to an indoor unit. More specifically, it is an indoor unit arranged especially in the back of the ceiling, and checks the dirt in the drain pan arranged below the heat exchanger of the indoor unit, or checks the operating state of the drain pump. The present invention relates to an indoor unit provided with an inspection window.

  According to the current building environmental hygiene management standard (former Building Pipe Law), indoor units of air conditioners are obliged to periodically check the drain pan for dirt (once a month). In the present situation, the drain pan is inspected for dirt, either by stopping the operation of the indoor unit and then removing a part of the casing of the indoor unit and checking the inside of the drain pan, or removing the drain pan from the device and checking the dirt. In addition, since the work is performed in a narrow place, the workability is poor and the work requires a lot of man-hours.

  Then, the indoor unit which can check the dirt in the said drain pan, without removing a drain pan from an apparatus is proposed (refer patent document 1). In the indoor unit described in Patent Document 1, as shown in FIG. 3, the drain pan 30 is composed of a resin-molded drain sheet 31 and a foam 32 that covers the lower side of the drain sheet 31. A storage portion 33 in which the drain D is stored is formed in the drain sheet 31. The reservoir 33 is made of a transparent member, and a suction port 34a of the drain pump 34 is disposed therein. Moreover, the part which protrudes outside from the foam 32 among the said storage parts 33 is covered with the detachable cap member 35 similarly produced with the foam. In FIG. 3, reference numeral 36 denotes a detachable lid for closing the drain port 37.

  In order to enable internal observation from outside the apparatus, it has also been proposed that a part of the indoor unit casing near the drain pan is made of a transparent member (see Patent Document 2).

JP 2007-309558 A JP 2007-327687 A

  In the indoor unit described in Patent Document 1, the bottom of the drain pan that is most likely to be dirty is directly visible through a transparent storage part, but after removing the bottom of the indoor unit casing in order to check the storage part, heat insulation is performed. The process which removes the cap member for use from a storage part is required. Further, if the cap member is forgotten to be attached after the work, condensation may occur near the lower surface of the storage portion, and the condensation may leak outside the machine. In addition, the operation is performed after the operation of the indoor unit is stopped.

  In addition, in the indoor unit described in Patent Document 2, a step of disassembling the indoor unit is not required when inspecting the drain pan, but the inspection window made of a transparent member is located away from the drain pan below the suction port of the drain pump, Since the vicinity of the bottom of the drain pan is observed obliquely from above, it is difficult to sufficiently confirm the state of the drain pan.

  This invention is made | formed in view of such a situation, and it aims at providing the indoor unit which can fully confirm the state of a drain pan from the outside, without disassembling an apparatus. .

(1) The indoor unit of the present invention is an indoor unit provided with an inspection window provided at a position where the vicinity of the suction port of the drain pump can be viewed on the side wall of the drain pan disposed below the heat exchanger,
The inspection window has a double window structure in which an inner window made of a transparent plate material and an outer window made of a transparent plate material are arranged facing each other with an air layer interposed therebetween, and
An opening that allows the inspection window to be seen is formed in a casing of the indoor unit.

  In the indoor unit of the present invention, since the inspection window is provided at a position where the vicinity of the suction port of the drain pump can be viewed on the side wall of the drain pan, the vicinity of the bottom of the drain pan that is easily contaminated can be easily and reliably visually recognized. . In addition, since the inspection window has a double window structure, the heat insulation is high, and it is possible to prevent condensation on the outer surface of the inspection window due to the cool air inside the drain pan during cooling. Furthermore, since the inspection window and eventually the inside of the drain pan can be observed through the opening formed in the casing of the indoor unit, there is no need to disassemble the indoor unit and stop the operation as in the conventional case. The man-hours for can be greatly reduced.

(2) In the indoor unit of (1), a waterproof sheet is disposed on an inner surface of a side wall and a bottom of the drain pan,
The waterproof sheet has an opening slightly smaller than the inner window corresponding to the position of the inner window, and
The inner surface of the inner window and the outer surface of the waterproof sheet may be sealed at the periphery of the opening. In this case, since the inner surface of the inner window and the outer surface of the waterproof sheet are sealed, it is possible to prevent the drain in the drain pan from leaking outside through the inspection window.

(3) In the indoor unit of (2), the sealing may be performed with a hot melt adhesive. In this case, the inner side surface of the inner window and the outer side surface of the waterproof sheet can be sealed by heating without adhesion by a chemical reaction.

(4) In the indoor units of (1) to (3), the outer peripheral edge of the outer window may be sealed with a tape material made of foam. In this case, the periphery of the outer surface of the outer window can be sealed by a simple means such as a tape material.

(5) In the indoor unit of (4), the opening of the casing is formed at a position facing the outer window,
A pressing member is disposed along the inner edge of the opening.
When the drain pan is disposed in the casing, the tape member may be pressed inward by the pressing member, and the sealing member may be configured by the pressing member and the tape member. In this case, it is possible to prevent the cool air or the warm air in the indoor unit from leaking to the outside by configuring the sealing portion with the pressing member and the tape material.

(6) In the indoor unit of (5), the pressing member may be made of open-cell polyethylene foam. In this case, since the open-cell polyethylene foam is a deformable material, when the tape material is pressed inward by the pressing member, it can be deformed to form a sealed portion with the tape material.

(7) In the indoor units of (1) to (6), the inner window and the outer window may be made of acrylic resin. In this case, the inner window and the outer window can be made excellent in heat resistance, weather resistance and strength.

(8) In the indoor unit of (7), the acrylic resin may be polymethyl methacrylate. In this case, the inner window and the outer window can be made excellent in heat resistance, weather resistance and strength.

(9) In the indoor units of (1) to (8), the inner window and the outer window may each have a thickness of 1 to 3 mm, and the air layer may have a thickness of 10 to 12 mm. . In this case, heat insulation can be improved while ensuring the strength and transparency of the inspection window.

(10) In the indoor units of the above (1) to (9), the inspection window is arranged on the side wall of the drain pan at a position where the vicinity of the suction port of the drain pump can be viewed from a direction substantially perpendicular to the window surface. It may be provided. In this case, since the vicinity of the suction port of the drain pump can be visually observed from the front of the window surface of the inspection window, the easily contaminated portion can be easily and reliably visually recognized.

  According to the indoor unit of the present invention, the state of the drain pan can be sufficiently and easily confirmed from the outside without disassembling the apparatus.

It is a schematic explanatory drawing of one embodiment of the indoor unit of the present invention. It is principal part sectional explanatory drawing of the outdoor unit shown by FIG. It is sectional explanatory drawing of the conventional inspection part for drain pans.

Hereinafter, embodiments of an indoor unit of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic explanatory view of an indoor unit 5 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional explanatory view of a main part of the indoor unit 5 shown in FIG.

  The indoor unit 5 is of a type disposed in the space S behind the ceiling of the air conditioning room A, and a known element such as the heat exchanger 1 and the blower 15 and valves (not shown) is provided in the casing 9. Is arranged. The casing 9 is made of a steel plate or the like, and is suspended from the floor slab 16 by a fixture such as a bolt or a hanging bracket 17 embedded in the floor slab 16 on the upper floor of the air conditioning room A.

  The indoor unit 5 is connected to a suction grill 19 and a blow-off grill 20 that open to the ceiling 18 of the air conditioning room A via a duct 21. The air in the air-conditioned room sucked from the suction grille 19 is cooled or heated by passing through the heat exchanger 1 and blown out from the blowout grill 20 into the air-conditioned room. Reference numeral 22 in FIG. 1 is a noise reduction chamber disposed in the middle of each duct on the suction side and the outlet side, and reference numeral 23 is a vibration absorbing member disposed between the indoor unit 5 and the duct 21. It is a flexible duct.

  A drain pan 2 is disposed below the heat exchanger 1, and the drain accumulated in the drain pan 2 is sucked by the drain pump 3 and discharged to the outside through the drain pipe 24. The side plate 9a of the casing 9 is formed with an opening 10 through which the inspection window can be viewed according to the position of the inspection window described later. An inspection port 25 is provided in the ceiling 18 below the opening 10, and an operator opens the inspection port 25 and puts the upper body into the back of the ceiling so that the inside of the drain pan 2 can be opened from the opening 10. In particular, the vicinity of the suction port 3a of the drain pump 3 can be visually observed.

  The inspection window 4 is provided at a position where the vicinity of the suction port 3a of the drain pump 3 can be seen on the side wall 2a of the drain pan 2 made of a synthetic resin foam. The inspection window 4 includes an inner window 6 and an outer window 7, and has a double window structure in which the inner window 6 and the outer window 7 are disposed to face each other with the air layer 8 interposed therebetween. Yes. Both the inner window 6 and the outer window 7 are made of a rectangular transparent plate material. As the material of the plate material, various materials can be used without particular limitation in the present invention as long as they are transparent and have a certain strength, but they are excellent in heat resistance, weather resistance and strength. It is more preferable to use an acrylic resin such as polymethyl methacrylate.

  The larger size of the inner window 6 and the outer window 7 is preferable because the inside of the drain pan is easier to observe. However, the inner window 6 and the outer window 7 are usually limited to about 35 cm × 45 cm due to certain restrictions due to the height of the side wall 2a of the drain pan 2. . The thicknesses of the inner window 6, the outer window 7, and the air layer 8 can be appropriately set in consideration of the strength, transparency, heat insulation, and the like of the inspection window 4, but usually the inner window 6 and the outer window 7. The thickness of each is about 1 to 3 mm, and the thickness of the air layer 8 is about 10 to 12 mm.

  A waterproof sheet 11 made of a synthetic resin such as polystyrene or vinyl chloride resin is disposed on the inner surface of the side wall 2a and the bottom 2b of the drain pan 2. An opening 11 a slightly smaller than the inner window 6 is formed in the waterproof sheet 11 near the inspection window 4 corresponding to the position of the inner window 6 of the inspection window 4. Thereby, the inside of the drain pan can be visually confirmed through the inspection window 4 and the opening 11a.

  At the periphery of the opening 11 a of the waterproof sheet 11, the inner surface of the inner window 6 (the surface inside the drain pan) and the outer surface of the waterproof sheet 11 are sealed with a hot melt adhesive. Further, the outer peripheral edge of the outer window 7 is sealed with a tape material 12 made of expanded polystyrene. In this way, by sealing the peripheral edges of the inner window 6 and the outer window 7, the drain in the drain pan contacts the peripheral edge of the inner window 6 and the outer window 7 and the drain pan 2 from the peripheral edge of the opening 11 a of the waterproof sheet 11. Leakage to the outside through the part can be prevented.

  A pressing member 13 made of continuous foamed polyethylene foam is disposed along the inboard side edge of the opening 10 formed in the casing 9. When the drain pan 2 is disposed at a predetermined position in the casing 9, the pressing member 13 can come into contact with the tape material 12 provided on the periphery of the outer window 7 and press the tape material 12 toward the inside of the machine. It is arranged at a position and is set to a size that can be pressed. The pressure member 13 and the tape material 12 are in close contact with each other to form a sealed portion, thereby preventing the cool air or warm air in the indoor unit 5 from leaking to the outside. Since the pressing member 13 is made of continuous foamed polyethylene foam, it can be easily deformed. For this reason, when the tape member 12 is pressed to the inside of the machine by the pressing member 13, the sealing member can be formed between itself and the tape member 12 by being deformed.

  In the present embodiment, the inspection window 4 is formed at the lower part of the side wall 2a of the drain pan 2, and more specifically, the lower end of the inner window 6 of the inspection window 4 is substantially coincident with the upper surface of the bottom part 2b of the drain pan 2. Yes. Since the suction port 3a of the drain pump 3 is disposed in the vicinity of the bottom surface of the drain pan 2, the inspection window 4 is formed in the lower part of the side wall 2a of the drain pan 2 in this manner, so that the suction port 3a can be viewed from a direction substantially perpendicular to the window surface. The vicinity of the suction port 3a of the drain pump 3 can be visually observed. Thereby, since the suction port 3a vicinity of the drain pump 3 can be visually observed from the front of the window surface of the inspection window 4, the part which is easy to get dirty can be visually recognized easily and reliably.

[Other variations]
The indoor unit of the present invention is not limited to the embodiment described above, and various modifications or changes can be made within the scope of the claims. For example, in the above-described embodiment, the inspection window is formed at the lower part of the drain pan side wall, but as long as the suction port of the drain pump is visible, it should be formed at the center or upper part of the drain pan side wall. Is also possible.

  In the above-described embodiment, the window surface of the inspection window is substantially vertical. However, when the side wall of the drain pan is inclined, the inspection window can be inclined in accordance with the inclination.

  In the above-described embodiments, the inner window and the outer window are rectangular, but other shapes such as a circle and an ellipse may be used.

  In the embodiment described above, the inner window and the outer window have the same thickness, but may have different thicknesses.

DESCRIPTION OF SYMBOLS 1 Heat exchanger 2 Drain pan 2a Side wall 2b Bottom part 3 Drain pump 3a Suction port 4 Inspection window 5 Indoor unit 6 Inner window 7 Outer window 8 Air layer 9 Casing 9a Side board 10 Opening part 11 Waterproof sheet 11a Opening 12 Tape member 13 Pressing member

Claims (10)

An inspection window (4) provided at a position where the vicinity of the suction port (3a) of the drain pump (3) is visible in the side wall (2a) of the drain pan (2) disposed below the heat exchanger (1). Indoor unit (5),
The inspection window (4) has a double wall in which an inner window (6) made of a transparent plate material and an outer window (7) made of a transparent plate material face each other with an air layer (8) interposed therebetween. Has a window structure, and
An indoor unit (5), wherein an opening (10) through which the inspection window (4) can be seen is formed in a casing (9) of the indoor unit (5). A waterproof sheet (11) is disposed on the inner surface of the side wall (2a) and bottom (2b) of the drain pan (2),
The waterproof sheet (11) has an opening (11a) slightly smaller than the inner window (6) corresponding to the position of the inner window (6), and
The indoor unit (5) according to claim 1, wherein an inner surface of the inner window (6) and an outer surface of the waterproof sheet (11) are sealed at a peripheral edge of the opening (11a).   The indoor unit (5) according to claim 2, wherein the sealing is performed by a hot melt adhesive.   The indoor unit (5) according to any one of claims 1 to 3, wherein a peripheral edge of an outer surface of the outer window (7) is sealed with a tape material (12) made of a foam. The opening (10) of the casing (9) is formed at a position facing the outer window (7),
A pressing member (13) is disposed along the inner edge of the opening (10),
When the drain pan (2) is disposed in the casing (9), the tape member (12) is pressed inward by the pressing member (13), and the pressing member (13) and the tape material (12) The indoor unit (5) according to claim 4, wherein the sealing part is configured.   The indoor unit (5) according to claim 5, wherein the pressing member (13) is made of open-cell polyethylene foam.   The indoor unit (5) according to any one of claims 1 to 6, wherein the inner window (6) and the outer window (7) are made of acrylic resin.   The indoor unit (5) according to claim 7, wherein the acrylic resin is polymethyl methacrylate.   The inner window (6) and the outer window (7) each have a thickness of 1 to 3 mm, and the air layer (8) has a thickness of 10 to 12 mm. The indoor unit (5) described.   The inspection window (4) is disposed at a position in the side wall (2a) of the drain pan (2) where the vicinity of the suction port (3a) of the drain pump (3) is visible from a direction substantially perpendicular to the window surface. The indoor unit (5) according to any one of claims 1 to 9.

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