JP2010169276A - Ceiling-embedded air conditioning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ceiling-embedded air conditioning device capable of preventing the corrosion of a partitioning plate connecting both ends of a heat exchanger by a simple configuration. <P>SOLUTION: An air blower 9, the heat exchanger 11 bent in a state of surrounding the air blower 9 and connecting both ends 11F, 11G by the partitioning plate 35, and a drain pan 13 covering a lower face of the heat exchanger 11 are disposed in a housing 1, the drain pan 13 includes a loading section 45 on which the heat exchanger 11 is loaded, at a position higher than a bottom surface 42A of a storage 42 for storing the drainage, and a rising section 46 extending higher than a top face 45A of the loading section 45 is disposed on a part corresponding to the partitioning plate 35 of the loading section 45. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a ceiling-embedded air conditioner including a drain pan that covers a lower surface of a heat exchanger in a housing.

Conventionally, a ceiling-embedded air conditioner that includes a blower, a heat exchanger that is bent so as to surround the blower and both ends are joined by a partition plate, and a drain pan that covers the lower surface of the heat exchanger in a casing. An apparatus is known (see, for example, Patent Document 1). In this type of air conditioner, since the heat exchanger is supported by the housing via the partition plate, the partition plate is formed of a steel plate material having a certain degree of strength.
JP 2008-064394 A

By the way, drain water accumulates in the drain pan storage part, and when the heat exchanger is immersed in this drain water, the partition plate that joins both ends of the heat exchanger is also immersed in the drain water, and this partition plate corrodes. There is a fear. Corrosion of the partition plate lowers the support strength of the heat exchanger and causes air leakage in the partition plate. Therefore, measures to prevent the partition plate from corroding have been studied.
Here, it is considered that the surface of the partition plate is coated with a material having corrosion resistance (for example, zinc plating or nickel plating), or the partition plate itself is formed of a material having corrosion resistance (for example, stainless steel). In these measures, there is a problem that the cost of the heat exchanger increases and the configuration becomes complicated.
Therefore, the present invention aims to provide a ceiling-embedded air conditioner that solves the above-described problems of the prior art and that can prevent corrosion of the partition plate that connects both ends of the heat exchanger with a simple configuration. And

  The present invention is a ceiling-embedded type in which a blower, a heat exchanger that is bent so as to surround the blower, and whose both ends are joined by a partition plate, and a drain pan that covers the lower surface of the heat exchanger are provided in a casing. In the air conditioner, the drain pan includes a placement portion on which the heat exchanger is placed at a position higher than the bottom surface of the storage portion in which drain water accumulates, and the place corresponding to the partition plate of the placement portion. Further, the present invention is characterized in that a hill portion extending higher than the placement surface of the placement portion is provided.

  According to this configuration, since the drain pan includes the placement unit on which the heat exchanger is placed at a position higher than the bottom surface of the storage unit in which the drain water accumulates, the heat exchanger and the partition plate may be immersed in the drain water. It can be suppressed. Furthermore, since the drain pan is provided with a high plateau portion that extends higher than the placement surface of the placement portion at a location corresponding to the partition plate of the placement portion, for example, due to a malfunction of the drain pump, the drain pan storage portion Even if the amount of the drain water accumulated in the water rises to the height of the mounting portion, the partition plate is prevented from being immersed in the drain water, so that the corrosion of the partition plate can be prevented with a simple configuration.

  This structure WHEREIN: The lower end part of the said partition plate is good also as a structure notched according to the shape of the said hill part. According to this structure, the clearance gap between the lower end part of a partition plate and a hill part can be made small, and it is prevented that air leaks to the outer side of a partition plate through this clearance gap.

  In this configuration, an electrical box may be disposed on the lower surface of the drain pan, and a wiring path extending from the electrical box may be formed at a position corresponding to the hill. According to this configuration, since the wiring path is formed at a position corresponding to the hill part, it is possible to suppress a decrease in the strength of the drain pan due to the formation of the wiring path.

  According to the present invention, since the drain pan includes the placement unit on which the heat exchanger is placed at a position higher than the bottom surface of the storage unit in which drain water accumulates, the heat exchanger and the partition plate may be immersed in the drain water. It can be suppressed. Furthermore, since the drain pan is provided with a high plateau portion that extends higher than the placement surface of the placement portion at a location corresponding to the partition plate of the placement portion, for example, due to a malfunction of the drain pump, the drain pan storage portion Even if the amount of the drain water accumulated in the water rises to the height of the mounting portion, the partition plate is prevented from being immersed in the drain water, so that the corrosion of the partition plate can be prevented with a simple configuration.

Preferred embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side sectional view showing a ceiling-embedded air conditioner according to an embodiment of the present invention.
A ceiling-embedded air conditioner (hereinafter simply referred to as an air conditioner) 100 includes a box-shaped casing 1 made of sheet metal, and suspension metal fittings 2A (see FIG. 2) are provided at four corners of the casing 1. A plurality (four in this embodiment) are provided. A suspension bolt 2 fixed to the ceiling surface 110 is fixed to each suspension fitting 2A by a nut (not shown), and the air conditioner 100 is suspended from the ceiling surface 110 via these suspension bolts 2. The

A heat insulating material 3 made of styrene foam is disposed almost entirely inside the housing 1, and a blower 9 and a heat exchanger 11 are accommodated inside the heat insulating material 3. The blower 9 includes a fan motor 5 that has a shaft disposed downward and a turbo fan 7 that is attached to the shaft of the fan motor 5. The heat exchanger 11 is a plate fin type heat exchanger formed in a polygonal shape in plan view, and is disposed so as to surround the blower 9.
Below the heat exchanger 11, a drain pan 13 made of styrene foam is disposed so as to cover the lower surface of the heat exchanger 11. A polygonal suction opening 32 is opened at the center of the drain pan 13, and the suction portion of the blower 9 faces the suction opening 32. Further, a blow-off opening 33 for allowing the exhaust of the blower 9 that has passed through the heat exchanger 11 to pass is formed in the peripheral portion of the drain pan 13. At the upper part of the suction opening 32, a nozzle 17 for guiding the air in the conditioned room that has passed through the suction opening 32 to the blower 9 is attached. In addition, an electrical box 19 containing a control circuit, a power supply circuit, and the like of the air conditioner 100 is screwed to the lower surface of the drain pan 13.

A decorative panel 21 is attached to the lower surface of the housing 1. The decorative panel 21 is disposed on the ceiling plate 112 provided below the ceiling surface 110 via the ceiling back space 111 and exposed to the conditioned room. The decorative panel 21 is formed with a suction port 22 for sucking in air in the conditioned room and an outlet 23 for blowing out conditioned air that has passed through the heat exchanger 11 into the conditioned room. A filter 25 is mounted inside the suction port 22.
The air conditioner 100 allows a refrigerant supplied from an outdoor unit (not shown) to pass through the heat exchanger 11 so that the heat exchanger 11 functions as an evaporator or a condenser. The air conditioner 100 sucks room air in the conditioned room from the suction port 22 through the operation of the blower 9, cleans it with the filter 25, and then passes the room air to the heat exchanger 11 through the suction opening 32 and the nozzle 17. Cool or heat through to produce conditioned air. The air conditioner 100 blows conditioned air from the blowout opening 23 to the conditioned room through the blowout opening 33 and cools or heats the conditioned room by the operation of the blower 9.

FIG. 2 is a diagram showing the air conditioner 100 with the decorative panel 21 and the drain pan 13 removed from below, and FIG. 3 is a diagram showing the air conditioner 100 with the decorative panel 21 removed from below. . In addition, in this FIG. 2, the air blower 9 is shown with the broken line.
As shown in FIG. 2, the housing 1 includes four long side portions 31 </ b> A to 31 </ b> D and four short side portions 32 </ b> A to 32 </ b> D, and two adjacent long side portions that are arranged so as to form a substantially right angle. By disposing the short side portion (for example, the short side portion 32A) connecting them obliquely (for example, the long side portion 31A and the long side portion 31B), the casing 1 has a substantially vertical and horizontal length. It is formed in an equal octagonal appearance.
The heat exchanger 11 is bent into a substantially pentagonal (polygonal) shape and disposed inside the housing 1. The heat exchanger 11 has five sides 11A, 11B, 11C, 11D, and 11E in order from the refrigerant inlet / outlet side end portion 11F, and the three sides 11A, 11B, and 11C are three lengths of the casing 1. The side portions 31A, 31B, and 31C extend substantially parallel to each other, and the remaining two sides 11D and 11E are disposed so as to extend substantially parallel to one short side portion 32C of the housing 1 and the remaining long side portion 31D. ing. In this configuration, the heat exchanger 11 includes a side 11D that is bent so as to be substantially parallel to the short side portion 32C of the housing 1, and thus between the side 11D and the short side portion 32C of the housing 1. A large space can be provided, and the drain pump 28 is disposed in this space.
Further, tube plates 34A and 34B are provided at the refrigerant inlet / outlet side end portion 11F, which is the bending start position of the heat exchanger 11, and the terminal end portion 11G, which is the bending start position, respectively. They are connected by a partition plate 35. Between the partition plate 35 and the short side portion 32D, piping 27 connected to the refrigerant inlet / outlet side end portion 11F is disposed.

As shown in FIG. 3, the drain pan 13 is a member that receives drain water falling from the heat exchanger 11, and is disposed in contact with the inner surface of the housing 1. The drain pan 13 includes four outlet openings 33 formed along the long side portions 31 </ b> A to 31 </ b> D of the housing 1, and these outlet openings 33 communicate with the outlet 23 of the decorative panel 21. The drain pan 13 is provided with a step portion 36 formed by cutting its lower surface 13A into substantially the same shape as that of the heat exchanger 11, and a circular suction opening 32 is formed at the approximate center of the step portion 36. In addition, a nozzle 17 is provided in the suction opening 32.
In addition, the electrical box 19 is provided on the step portion 36 of the drain pan 13. The electrical box 19 is provided at a position outside the nozzle 17 in the radial direction and corresponding to the side 11E of the heat exchanger 11 and the partition plate 35. For this reason, since it can prevent that the electrical equipment box 19 extends on the suction opening 32 by planar view, it becomes possible to reduce intake resistance.
Further, a wiring path 16 is formed on the lower surface 13A of the drain pan 13 by cutting the drain pan 13 into a substantially concave cross section between one short side portion 32D of the housing 1 and the electrical equipment box 19. Wiring (not shown) connected to the electrical equipment box 19 from the outside of the housing 1 is guided to the electrical equipment box 19 along the wiring path 16.

4 is a perspective view of the drain pan, and FIG. 5 is a cross-sectional view taken along line VV of FIG.
On the upper surface of the drain pan 13, as shown in FIG. 4, a protruding portion 40 that protrudes upward corresponding to the stepped portion 36 is formed in the approximate center. In addition, a side wall 41 is provided on the upper surface of the drain pan 13 around the drain pan 13, and a reservoir 42 in which drain water is accumulated is formed between the side wall 41 and the protrusion 40.
Further, the drain pan 13 is formed with a mounting portion 45 around which the heat exchanger 11 is mounted around the protruding portion 40. As shown in FIG. 5, the mounting portion 45 is formed such that the upper surface (mounting surface) 45 </ b> A of the mounting portion 45 is positioned higher than the bottom surface 42 </ b> A of the storage portion 42. The height (the height from the bottom surface 42A of the storage portion to the top surface 45A of the placement portion) H1 of the placement portion 45 is within a drain pipe (not shown) that flows back to the drain pan 13 when the drain pump 28 stops. The height of the return water is higher than H2. According to this, in a normal use state, the drain water collected in the storage part 42 of the drain pan 13 does not become higher than the upper surface 45A of the placement part 45, and the heat exchanger 11 is prevented from being immersed in the drain water. Is done.

  Furthermore, in this configuration, the mounting portion 45 is formed with a hill portion 46 that extends higher than the upper surface 45A of the mounting portion 45 at a location corresponding to the partition plate 35 described above. The elevated portion 46 fits between the tube plates 34A and 34B of the heat exchanger 11 and supports the partition plate 35 provided between the tube plates 34A and 34B. The lower end portion 35A of the partition plate 35 is notched according to the shape of the hill portion 46, and when the heat exchanger 11 is placed on the placement portion 45, the lower end portion 35A of the partition plate 35 and the hill portion The gap with 46 can be reduced, and air can be prevented from leaking to the outside of the partition plate 35 through this gap. In addition, a sealing material 47 formed of a rubber material or the like is disposed on the upper surface of the mounting portion 45 and the hill portion 46, and the gap between the mounting portion 45 and the heat exchanger 11 and the hill portion 46 and the partition plate 35 are arranged. The airtightness of the gap is maintained.

  Further, as shown in FIG. 5, the elevated portion 46 is provided at a position corresponding to the wiring path 16 formed on the lower surface 13 </ b> A of the drain pan 13. Since the wiring path 16 is formed by cutting out the drain pan 13 in a substantially concave shape as described above, the thickness of the drain pan 13 is reduced accordingly, and the strength of the drain pan 13 may be reduced. However, in this configuration, since the hill portion 46 is provided at a position corresponding to the wiring path 16, it is possible to prevent the drain pan 13 from being thinned, and to suppress a decrease in strength of the drain pan 13.

  As described above, according to the present embodiment, the heat exchanger 11 that is bent so as to surround the blower 9 and both end portions 11F and 11G are coupled to each other by the partition plate 35, and the heat A drain pan 13 covering the lower surface of the exchanger 11 is provided in the housing 1, and the drain pan 13 is a mounting portion 45 on which the heat exchanger 11 is mounted at a position higher than the bottom surface 42 </ b> A of the storage portion 42 where drain water is accumulated. Therefore, it is possible to suppress the heat exchanger 11 and the partition plate 35 from being immersed in the drain water. Furthermore, since the drain pan 13 includes a hill portion 46 that extends higher than the upper surface 45A of the mounting portion 45 at a location corresponding to the partition plate 35 of the mounting portion 45, for example, due to malfunction of the drain pump, Even if the amount of drain water collected in the drain pan storage part rises to the height of the mounting part, the partition plate is prevented from being immersed in the drain water, thereby preventing the corrosion of the partition plate with a simple configuration. it can.

  Further, according to the present embodiment, the lower end portion 35 </ b> A of the partition plate 35 is notched according to the shape of the hill portion 46, so that the gap between the lower end portion 35 </ b> A of the partition plate 35 and the hill portion 46 is reduced. It is possible to prevent air from leaking to the outside of the partition plate 35 through this gap.

  Further, according to the present embodiment, the electrical box 19 is disposed on the lower surface 13A of the drain pan 13, and the wiring path 16 of the wiring extending from the electrical box 19 is formed at a position corresponding to the hill portion 46. The strength reduction of the drain pan 13 due to the formation of the wiring path 16 can be suppressed.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this, A various change implementation is possible.

1 is a cross-sectional view of a ceiling-embedded air conditioner according to an embodiment of the present invention. It is a figure which shows the air conditioning apparatus of the state which removed the decorative panel and the drain pan from the downward direction. It is a figure which shows the air conditioning apparatus of the state which removed the decorative panel from the downward direction. FIG. 4 is a perspective view of the drain pan. It is VV sectional drawing of FIG.

DESCRIPTION OF SYMBOLS 1 Case 9 Blower 11 Heat exchanger 11F Refrigerant inlet / outlet side end portion 11G Termination portion 13 Drain pan 13A Lower surface 16 Wiring path 17 Nozzle 19 Electrical box 21 Cosmetic panel 28 Drain pump 34A Tube plate 35 Partition plate 35A Lower end portion 40 Projection portion 41 Side wall part 42 Storage part 42A Bottom surface 45 Mounting part 45A Upper surface (mounting surface)
46 Plateau 47 Sealing material 100 Air conditioner

Claims (3)

In a ceiling-embedded air conditioner that includes a blower, a heat exchanger that is bent so as to surround the blower, and both ends are joined by a partition plate, and a drain pan that covers the lower surface of the heat exchanger. ,
The drain pan includes a mounting unit on which the heat exchanger is mounted at a position higher than the bottom surface of the storage unit in which drain water accumulates, and the mounting unit is provided at a position corresponding to the partition plate of the mounting unit. A ceiling-embedded air conditioner characterized in that a hill part extending higher than the mounting surface is provided.   The ceiling-embedded air conditioner according to claim 1, wherein a lower end portion of the partition plate is cut out according to a shape of the hill portion.   3. The ceiling buried according to claim 1, wherein an electrical box is disposed on a lower surface of the drain pan, and a wiring path for wiring extending from the electrical box is formed at a position corresponding to the hill portion. Built-in air conditioner.

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