JP2007093172A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of surely guiding dew condensation water, flowing down through a seal material, to a drain pan. <P>SOLUTION: In this air conditioner, a box-shaped internal heat insulating material 21 made of resin foam, the drain pan 18 made of resin foam and mounted in a state of being kept into contact with a lower end of the internal heat insulating material, and an indoor heat exchanger 19 partitioning a primary air side 15a and a secondary air side 15b through a seal material 26 between the drain pan 18 and the internal heat insulating material 21, are mounted in an outer case 11 made of steel plate. A lower end provided with at least the seal material 26, of the internal heat insulating material 21 is elongated, and the elongated portion 21b is positioned inside of the drain pan 18. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air conditioner, and more particularly, to an improvement in the lower end of a partition part on the side of a tube sheet of a heat exchanger.

  A conventional ceiling-embedded air conditioner has a box shape with an open lower end, a sheet metal outer box suspended from the ceiling, a suction port and a blowout port, and a makeup provided at the lower end opening of the outer box A panel, a blower fan that is housed in the outer box and sucks room air from the suction port and feeds it to the primary air side, and a heat exchanger that is housed in the outer box and placed on a drain pan It is the structure provided (refer patent document 1).

In this type, in the outer box made of sheet metal, a box-shaped foamed resin internal heat insulating material, a foamed resin drain pan provided in contact with the lower end of the internal heat insulating material, the drain pan, and the internal heat insulating material The indoor heat exchanger which partitions a primary air side and a secondary air side between these is proposed. In this case, a cut and raised piece formed by extending and bending the tube plate of the indoor heat exchanger, or a sheet metal partition plate separate from the tube plate is brought into contact with the inner wall of the internal heat insulating material and a sealing material is interposed. In general, the primary air side and the secondary air side are partitioned. At the cut-and-raised piece or the sheet metal partition plate, condensation occurs due to the temperature difference between the primary air and the secondary air during the cooling operation, and this condensation flows down the cut-and-raised piece or the sheet metal partition plate. , Received by the drain pan.
JP-A-6-137589

  However, the amount of dew generated in the cut and raised pieces or the sheet metal partition plate is considerably large as it is sucked into the seal material and flows down the seal material, whereas in the conventional configuration, the lower end of the seal material is the internal heat insulating material. The sealing material could not reliably lead the condensed water into the drain pan until the end.

  An object of the present invention is made in view of the above-described points, and an object of the present invention is to provide an air conditioner that can reliably guide condensed water flowing down through a sealing material to a drain pan.

In order to solve the above-mentioned problems, an air conditioner of the present invention is made of a foamed resin provided inside a sheet metal outer box in contact with a box-shaped foamed resin internal heat insulating material and a lower end of the internal heat insulating material. In an air conditioner in which a drain pan and an indoor heat exchanger disposed with a sealant interposed so as to partition a primary air side and a secondary air side between the drain pan and the internal heat insulating material are disposed, At least a lower end of the internal heat insulating material provided with the sealing material is extended, and the extended portion is positioned inside the drain pan.
According to the configuration of the above feature, the sealing material can be provided to extend to the lower end of the extension portion, and the condensed water flowing down through the sealing material can be reliably guided to the drain pan.

  In the configuration of the above feature, the extension portion may be formed by extending a thickness direction inner side portion of the lower end of the internal heat insulating material downward, and a recess for receiving the extension portion may be provided on an inner surface of the side wall portion of the drain pan. preferable. Further, the extension portion is formed in a wedge shape that extends the inner side in the thickness direction of the lower end of the inner heat insulating material straightly downward on the inner surface of the heat insulating material and becomes smaller as the wall thickness greatly decreases at the upper end, It is more preferable to provide a wedge-shaped recess for accommodating the extension portion in close contact with the inner surface of the side wall portion of the drain pan.

According to this, since the extension portion does not protrude from the inner surface of the side wall portion of the drain pan, the sealing material can be stretched straight, and the condensed water flowing down through the sealing material does not stagnate at the location of the extension portion. Guided to drain pan.
In the configuration of the above feature, it is preferable that the extension portions are respectively formed corresponding to sealing materials at both ends of the indoor heat exchanger.

  According to the present invention, the sealing material can be provided to extend to the lower end of the extension portion, and the dew condensation water flowing down through the sealing material can be reliably guided to the drain pan.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a longitudinal side view of an air conditioner according to the present invention. FIG. 2 is a view of the air conditioner suspended and fixed in the ceiling space according to the present invention as viewed from below with the decorative panel and the drain pan removed. FIG. 3 is a view of the state where the decorative panel is removed and the drain pan is not removed, as viewed from below.

  This air conditioner 10 includes a box-shaped foamed resin internal heat insulating material 21 in a sheet metal outer box 11, a foamed resin drain pan 18 in contact with the lower end of the internal heat insulating material 21, and the drain pan 18. And an indoor heat exchanger 19 whose upper surface is in close contact with the internal heat insulating material 21 is disposed between the drain pan 18 on the refrigerant pipe take-out side of the indoor heat exchanger 19 and the internal heat insulating material 21. About the clearance, the sealing member 23 is interposed by the closing member 22 provided in the tube plate 20 to partition the primary air side 15a and the secondary air side 15b, and the drain pan on the side opposite to the refrigerant pipe take-out side of the indoor heat exchanger 19 The primary air side 15a and the secondary air side 15b are partitioned by a second closing member 25 provided on the tube plate 24 with a sealing material 26 interposed between the space 18 and the internal heat insulating material 21. In particular, in the air conditioner 10 of this embodiment, at least the lower end of the internal heat insulating material 21 provided with the sealing material 23 is extended, and the extended portion 21 c is positioned inside the drain pan 18. .

  Details will be described below. As shown in FIGS. 1 and 2, the air conditioner 10 is provided with an outer box 11 that is made of a box-shaped sheet metal having an open lower end and is suspended from a ceiling slab 50, and the inside of the outer box 11 is a sheet metal blower. The partition plate 42 divides the machine chamber 16 that houses the blower fan 17 and the heat exchanger chamber 15 that houses the indoor heat exchanger 19, and the heat exchanger chamber 15 is provided with an internal heat insulating material 21 made of foamed resin (made of polystyrene foam). A drain pan 18 that is disposed and waterproof-coated with foamed resin (made of foamed polystyrene) that contacts the lower end of the internal heat insulating material 21 is provided, and the indoor heat An exchanger 19 is arranged, and has a decorative panel 14 that has a suction port 12 and a blowout port 13 and is fixed over the lower end opening of the outer box 11. In FIG. 21, reference numeral 27 denotes an electric expansion valve.

  The air conditioner 10 drives the blower fan 17 to suck indoor air from the suction port 12 of the decorative panel 14, and feeds the indoor air to the primary air side 15 a of the heat exchanger chamber 15 to exchange the indoor heat. This is a so-called one-way blowing type air conditioner in which heat is exchanged by passing through gaps between fins of the vessel 19 and the heat-exchanged air is blown out from the blowout port 13.

  The outer box 11 is a box shape having a front wall on the air outlet 13 side, a rear wall on the suction port 12 side, left and right side walls, and an upper surface wall, with the lower ends open. A suspension fitting 30 is provided, and the nut 32 is tightened through a lower end of a suspension bolt 31 suspended from the ceiling slab 50 to the suspension fitting 30 to be suspended in a state accommodated in the ceiling space (FIGS. 2 and 4). reference). The box-shaped foamed resin internal heat insulating material 21 is provided in close contact with the inner surface of the heat exchanger chamber 15 of the sheet metal outer box 11.

As shown in FIG. 1, the decorative panel 14 is fixed on the lower end opening of the outer box 11 with a screw. When this decorative panel 14 is removed, as shown in FIG. 3, the inside of the machine room 16 of the outer box 11 is exposed and the drain pan 18 is exposed. The decorative panel 14 includes a grill 51 having a plurality of lattice-shaped openings so that the grill 51 can be removed from the suction port 12, and the filter material 33 can be replaced on the grill 51.
Further, the blower outlet 13 of the decorative panel 14 is provided with a synthetic resin wind direction changing plate 34 so as to be able to swing within a vertical cross section of the blower outlet 13 in the width direction. It is configured so that the inclination can be adjusted by changing the wind direction. The driving and rotating direction of the micromotor 35 can be controlled by receiving a transmission signal from the remote controller and sending a radio wave to the electrical equipment box 28, and also by operating a button of a control device (not shown) provided on the indoor wall surface. It is configured to be controlled.

As shown in FIG. 1, the sheet metal blower partition plate 42 that partitions the inside of the outer box 11 between the indoor heat exchanger 19 and the blower fan 17 has an opening, and the blower port 17 a of the blower fan 17 is provided in this opening. Is plugged in and connected. The blower fan 17 is preferably a sirocco fan and is rotated by a motor 36. As shown in FIG. 2, the motor 36 has a motor bracket 37 in which the shaft extends on both sides and the bearing 52 is fitted, and the bearing 52 is provided by the upper surface portion of the outer box 11 and the sheet metal blower partition plate 42. It is supported by.
The drive of the motor 36 can be controlled by receiving a transmission signal from the remote controller and sending a radio wave to the electrical box 28, and is also controlled by operating a button of a control device (not shown) provided on the indoor wall surface. It is comprised as follows.

The indoor heat exchanger 19 condenses on the heat radiating fins and other portions that generate a temperature difference during the cooling operation. This dew condensation is received by a drain pan 18 made of foamed resin with waterproof coating. As for drainage means, a liquid level sensor 39 and a drain pump 40 are attached to a bracket 38 provided on a sheet metal blower partition plate 42, and the liquid level sensor 39 and the drain pump 40 are at the lowest position of the drain pool of the drain pan 18. It is the structure located in. The drain pump 40 operates when the drain accumulates, draws drain water, and discharges it from the drain port 41. The liquid level sensor 39 detects when the drain water has accumulated at the permissible level of the drain pan 18, outputs a signal, sends a signal to the electrical box 28, stops the operation of the air conditioner 10, and issues a warning.
In addition, the indoor heat exchanger 19 is provided with tube plates 20 and 24 that hold the refrigerant pipes at both ends by inserting the meandering refrigerant pipes through the holes of the laminated radiating fins. Therefore, the tube sheets 20 and 24 define both end portions of the indoor heat exchanger 19. On the outer surface of the tube plate 24, there are refrigerant pipe take-out portions 29a and 29b.

The indoor heat exchanger 19 has its upper surface substantially in close contact with the upper wall of the internal heat insulating material 21 and its lower surface placed on the foamed resin drain pan 18. However, since the indoor heat exchanger 19 has a U-shaped portion of the refrigerant pipe and a refrigerant pipe take-out portion projecting outside the tube plates 20 and 24, the pipe plate 20 on the refrigerant pipe take-out side and the corresponding internal heat insulating material. 21 so that the gap between the side wall 21 and the inner wall 21a becomes a large space in which the refrigerant pipe take-out portions 29a and 29b and other pipes can be accommodated. The indoor heat exchanger 19 is arranged in a space surrounded by the internal heat insulating material 21 so that a gap between the side wall of the internal heat insulating material 21 and the inner wall 21b becomes a small space in which the U-shaped portion of the refrigerant pipe can be accommodated. Yes.
Therefore, a blocking member 22 is provided on the tube plate 20 of the indoor heat exchanger 19, and the primary air side 15a and the secondary air side 15b are provided with the sealing material 23 interposed between the blocking member 22, the internal heat insulating material 21 and the drain pan 18. And the tube plate 24 is provided with a second closing member 25, and a sealing material 26 is interposed between the second closing member 25, the internal heat insulating material 21 and the drain pan 18, and the primary air side 15a and the secondary air side. 15b is configured to partition.
However, if the sealing member 22 and the second closing member 25 are configured to partition with the sealing materials 23 and 26 interposed therebetween, the condensation generated in the closing member 22 and the second closing member 25 is reduced. Go down 26 and flow down. Sealing materials 23 and 26 are provided to guide the condensation flowing down through the sealing materials 23 and 26 to the drain pan 18 without guiding it to the contact surface between the lower end of the internal heat insulating material 21 and the upper end of the drain pan 18. The lower end of the inner heat insulating material 21 is extended, and the extended portions 21c and 21d are positioned inside the drain pan 18 so that the sealing materials 23 and 26 can be extended below the upper end of the drain pan 18 (see FIG. 4).

4 to 7 are views for explaining a partition structure on the refrigerant pipe take-out side of the indoor heat exchanger 19. FIG. 4 is a front view of the indoor heat exchanger 19 as viewed from the secondary air side. FIG. 5 is a partial front view showing a state in which the indoor heat exchanger 19 placed on the drain pan 18 is being housed in the foamed resin internal heat insulating material 21. FIG. 6 is a partial plan view on the tube sheet 20 side showing a state in which the indoor heat exchanger 19 placed on the drain pan 18 is accommodated in the foamed resin internal heat insulating material 21. FIG. 7 is a partial perspective view of the lower end of the side surface portion of the internal heat insulating material 21 on the refrigerant pipe take-out side.
A partition structure on the refrigerant pipe take-out side will be described with reference to FIGS.
The closing member 22 is made of sheet metal, and one end is fixed to the tube plate 20 on the refrigerant pipe take-out side with a screw, and is opposite to the inner surface 21a having the draft angle of the foamed resin internal heat insulating material 21. The flat plate portion 22a having a shape corresponding to the wedge-shaped gap between the tube plate 20 and the front end of the flat plate portion 22a is further extended and bent to have the draft angle of the internal heat insulating material 21 made of foamed resin. A flexible sealing material 23 is provided that includes a flange portion 22b that is in close contact with the inner surface 21a, and the flange portion 22b and an inner surface 21a having a draft of the foamed resin internal heat insulating material 21 are attached to the inner surface 21a side. It is sealed by interposing.
Like the said structure, the clearance gap between the pipe plate 20 by the side of refrigerant | coolant piping extraction and the inner wall 21a of the side surface of the internal heat insulating material 21 corresponding to this is a big space which can accommodate refrigerant | coolant piping extraction part 29a, 29b and other piping. Therefore, the area of the blocking member 20 is large, and the amount of dew generated on the blocking member 22 is large because the amount of secondary air that touches the blocking member 22 is large. 7, the lower end of the internal heat insulating material 21 provided with the sealing material 23 is extended into a triangular shape as shown in FIG. Is positioned inside the drain pan 18.

FIG. 8 and FIG. 9 are diagrams for explaining a partition structure on the side opposite to the refrigerant pipe take-out side of the indoor heat exchanger 19. FIG. 8 is a partial front view showing a state in which the indoor heat exchanger 19 placed on the drain pan 18 is being housed in the foamed resin internal heat insulating material 21. FIG. 9 is a partial plan view on the tube plate 24 side showing a state in which the indoor heat exchanger 19 placed on the drain pan 18 is housed in the foamed resin internal heat insulating material 21.
8 and 9 illustrate a partition structure on the side opposite to the refrigerant pipe take-out side.
A gap between the tube plate 24 of the indoor heat exchanger 19 and the inner wall 21 b of the side surface portion of the foamed resin internal heat insulating material 21 is closed by a second closing member 25 provided by extending one side of the tube plate 24.
The 2nd obstruction | occlusion member 25 is short length according to the clearance gap between the tube plate 24 and the inner wall 21a of the side part of the foamed resin internal heat insulating material 21. As shown in FIG. Since the second closing member 25 is a cut-and-raised piece formed by bending one end of the tube plate 24, the structure is simple and robust.
The second closing member 25 includes a rib 25a that closes a wedge-shaped gap between the inner wall 21b having a draft of the side surface portion of the foamed resin internal heat insulating material 21 and the tube plate 24, and further extends the tip of the rib 25a. And a flange portion (abutment surface portion) 25b which is formed to be bent into an angle shape and is in close contact with the inner surface 21b having the draft angle of the foamed resin internal heat insulating material 21, and the flange portion 25b and the foamed resin. The inner surface 21b having a draft of the internal heat insulating material 21 is sealed with a sealing material 26 attached to the inner surface 21b side.
As in the above configuration, the gap between the tube plate 24 opposite to the refrigerant pipe take-out side and the corresponding inner wall 21b on the side surface of the internal heat insulating material 21 is a small space in which the U-shaped portion of the refrigerant pipe can be accommodated. Since the area of the second closing member 25 is small and the amount of secondary air that touches the second closing member 25 is small, the amount of condensation generated on the second closing member 25 is small. In order not to squeeze out from the contact surface between the internal heat insulating material 21 and the drain pan 18 through the material 26, the lower end of the internal heat insulating material 21 provided with the sealing material 26 is extended in a triangular shape, The extension 21d is positioned inside the drain pan 18.

In this embodiment, as shown in FIG. 4, the extension portions 21 c and 21 d are formed by extending the inner side in the thickness direction at the lower end of the internal heat insulating material 21 downward. The extension portions 21c and 21d are formed in a wedge shape that extends inward in the thickness direction at the lower end of the inner heat insulating material straightly downward on the inner surface of the heat insulating material and becomes smaller as the wall thickness greatly decreases at the upper end. It is. Correspondingly, the inner surface of the side wall of the drain pan 18 is provided with recesses 18a and 18b for receiving the extensions 21c and 21d.
The extension portions 21c and 21d are formed in a wedge shape in which the inner portion in the thickness direction at the lower end of the internal heat insulating material extends straight down the inner surface of the heat insulating material and becomes smaller as the wall thickness greatly decreases at the upper end. The recesses 18a and 18b are wedge-shaped recesses that closely accommodate and accommodate the extension portions 21c and 21d. When assembled, the extension portions 21c and 21d are not easily broken, and the engagement with the recesses 18a and 18b is difficult. The mating is performed smoothly and the assembly and sealing properties are good.
Therefore, since the sealing materials 23 and 26 can be provided to extend to the lower ends of the extension portions 21c and 21d, the condensed water flowing down through the sealing materials 23 and 26 can be reliably guided into the drain pan 18.

As mentioned above, although embodiment of the air conditioning apparatus of this invention has been explained in full detail with reference to drawings, this invention is not limited to said embodiment, In the range which does not deviate from a summary, various design changes are carried out. can do.
In the embodiment, the extension portions 21c and 21d are provided in correspondence with the sealing materials 23 and 26 on both sides of the indoor heat exchanger. However, at least, the extension portions 21c and 21d are provided so as to correspond to the sealing material 23 on the refrigerant pipe that flows down due to a large amount of dew condensation. It is sufficient if the extension portion 21c is provided.
In addition, for example, the widths of the extension portions 21c and 21d can be provided larger than the widths of the sealing materials 23 and 26.
Moreover, in the said embodiment, although applied to the one-way blowing type air conditioning apparatus, this invention is applied also to a two-way blowing type and a four-way blowing type air conditioning apparatus.

It is a vertical side view of the air conditioning apparatus of the present invention. It is the figure which removed the makeup | decoration panel and looked at the air conditioning apparatus. It is the figure which looked up the state with the drain pan from the bottom. It is the whole front view which looked at the indoor heat exchanger from the secondary air side. It is a partial front view from the secondary air side of the indoor heat exchanger in the middle of an assembly. It is a partial top view. It is the fragmentary perspective view which looked at the internal heat insulating material upside down. It is a partial front view of the indoor heat exchanger in the middle of an assembly from the primary air side. It is a partial top view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Air conditioning apparatus 11 Outer box 15a Primary air side 15b Secondary air side 18 Foamed resin drain pan 18a Recessed part 18b Recessed part 19 Indoor heat exchanger 20 Refrigerant pipe extraction side tube plate 21 Foamed resin internal heat insulating material 21a Inner surface 21b Inner surface 21c Extension part 21d Extension part 23 Sealing material 24 Tube plate on the side opposite to the refrigerant piping take-out side 26 Sealing material

Claims (4)

Inside the sheet metal outer box, a box-shaped foamed resin internal heat insulating material, a foamed resin drain pan provided in contact with the lower end of the internal heat insulating material, and primary air between the drain pan and the internal heat insulating material In an air conditioner in which an indoor heat exchanger is disposed with a sealant interposed so as to partition the side and the secondary air side,
An air conditioner characterized in that at least a lower end of the internal heat insulating material provided with the sealing material is extended, and the extended portion is positioned inside the drain pan.   The extension part is formed by extending a thickness direction inner part of a lower end of an internal heat insulating material downward, and a recess for receiving the extension part is provided on an inner surface of a side wall part of the drain pan. The air conditioning apparatus according to 1.   The extension part is formed in a wedge shape in which the inner part in the thickness direction at the lower end of the inner heat insulating material extends straight down the inner surface of the heat insulating material and becomes smaller as the wall thickness greatly decreases at the upper end. 2. An air conditioner according to claim 1, wherein a wedge-shaped recess for accommodating the extension portion in close contact is provided on the inner surface of the side wall portion. The air conditioner according to any one of claims 1 to 3, wherein the extension portions are respectively formed corresponding to sealing materials at both ends of the indoor heat exchanger.

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