WO2004020914A1 - Ceiling embedded-type air conditioning apparatus - Google Patents

Abstract

In a ceiling embedded-type air conditioning apparatus where a blower (9) and a heat exchanger (11) surrounding the blower are provided in a housing (1), the heat exchanger (11) is bent in a polygonal shape, and portion (11D) of the heat exchanger (11) bulges out toward the housing (1) at a position corresponding to one side (1D) of the housing (1). Below the heat exchanger (11) is a drain pan (13) structured from a resin frame for a drain pan sheet and foam polystyrene that are integrally formed. A suction hole to which a suction mouth of the blower faces is formed in the substantially central portion of the drain pan. In a resin frame (51), there is formed a boss (61) penetrating through foam polystyrene (53) and facing the opposite face of the frame. A bell mouth (14) of the blower is fixed to the boss (61).

Description

 Description Ceiling-mounted air conditioner Technical field

 The present invention relates to a ceiling-mounted air conditioner having a heat exchanger arranged so as to surround a blower, and particularly to pipes, drain pumps, transmission boxes and the like in a ceiling-mounted air conditioner body. The present invention relates to a ceiling-mounted air conditioner having a configuration in which a space for storing various devices can be effectively used, and in which the devices are easily mounted. Background art

 Generally, a heat exchanger is arranged so as to surround a blower provided in an air conditioner body (housing), and a conditioned air outlet is arranged facing a space outside the heat exchanger. There is known a ceiling-mounted air conditioner that heat-exchanges air through a heat exchanger and blows the heat-exchanged conditioned air into a room through a blowout port.

 In this type of device, various devices such as heat exchanger piping, transmission box, drain pump, etc. are stored in the narrow space inside the housing, so that the arrangement of these storage devices is not hindered. In addition, heat exchangers are subject to certain restrictions on the bending shape. On the other hand, heat exchangers are required to obtain as much capacity as possible by increasing their heat transfer area as much as possible.

 In addition, a drain pan formed by integrally forming a resin frame for drain pan sheet and styrofoam is arranged in the heat exchanger Byon of the ceiling-mounted type air conditioner of this type. A suction hole facing the suction port is formed. In this type, it is common to embed an insert bracket on the styrofoam surface on the opposite side of the resin frame, and screw a resin bellmouth or electrical box of a blower to this insert bracket. is there.

However, in such a configuration, the insert fitting must be embedded in the styrofoam surface, and there is a problem that workability is poor. In addition, suction holes are formed in the Styrofoam, but in such a configuration, the Styrofoam around the suction holes Since the rolls were exposed, there was a problem that the corners of the polystyrene foam were easily chipped during the transportation.

 Therefore, a first object of the present invention is to provide a heat exchanger capable of efficiently storing a heat exchanger in a narrow space in a housing and increasing a heat transfer area thereof, and a ceiling mounting using the same. It is to provide a type air conditioner.

 Further, a second object of the present invention is to solve the above-mentioned problems, and to provide a drain pan to which equipment such as a bell mouth of a blower and an electric box can be easily attached, and a ceiling-mounted air conditioner using the same. It is in. Disclosure of the invention

 To achieve the above object, according to a first aspect of the present invention, in a ceiling-embedded air conditioner in which a blower and a heat exchanger surrounding the blower are arranged in a housing, the heat exchanger includes: Provided is a ceiling-embedded air conditioner characterized by having a configuration in which the heat exchanger is bent into a polygonal shape and a part of the heat exchanger projects toward the housing.

 According to the second aspect of the present invention, in the ceiling-embedded air conditioner, a part of the heat exchanger projects toward the housing at least at a position corresponding to one side of the housing, whereby the housing One side and a part of the heat exchanger form at least two device accommodation spaces.

 According to a third aspect of the present invention, in the ceiling-mounted air conditioner, piping and a drain pump of the heat exchanger are arranged in the two device accommodation spaces, respectively. .

 According to the fourth aspect of the present invention, in the ceiling-embedded air conditioner, the heat exchanger including a part of the heat exchanger projecting toward the housing is bent into a substantially pentagonal shape. It is characterized by being.

 According to a fifth aspect of the present invention, in the ceiling-embedded air conditioner, a bending start position and a bending end position of the polygonally bent heat exchanger are connected by a narrow tube sheet. It is characterized by having been done.

According to a sixth aspect of the present invention, in the ceiling-mounted air conditioner, an auxiliary heater is further disposed between the heat exchanger and the blower, A component is supported by the tube sheet that connects a bending start position and a bending end position of the polygonal heat exchanger.

 According to a seventh aspect of the present invention, in the ceiling-embedded air conditioner, each corner of the polygonal heat exchanger is bent using a common bending roller jig. It is characterized by.

 According to an eighth aspect of the present invention, in the ceiling-embedded air conditioner, a part of the heat exchanger projecting toward the housing is arranged to face a space outside the heat exchanger. It is characterized by overlapping with the mouth.

 According to a ninth aspect of the present invention, in the ceiling-mounted air conditioner, a drain pan formed integrally with a drain pan resin frame and styrene foam is disposed below the heat exchanger; A suction hole is formed at a substantially central portion of the drain pan so as to face the suction port of the blower J¾¾, and a boss is formed in the resin frame through the styrofoam and facing the opposite surface, and the blower is provided at the boss. The bell mouth is formed so as to be fixable.

 According to a tenth aspect of the present invention, in the ceiling-embedded air conditioner, an electrical box is formed so as to be fixed to the boss.

 According to a eleventh aspect of the present invention, in the ceiling-embedded air conditioner, a reinforcing rib is formed around the boss.

 According to a 12th aspect of the present invention, in the ceiling-embedded air conditioner, a suction hole reinforcing rib surrounding a suction hole formed in the styrene foam is formed in the resin frame. Features.

 According to a thirteenth aspect of the present invention, in the ceiling-embedded air conditioner, the suction hole reinforcing rib extends around a lead line guide recess formed around the suction hole. It is characterized by being present.

 According to a fifteenth aspect of the present invention, in the ceiling-mounted air-conditioning apparatus, the air conditioner is disposed so as to surround the blower in a housing of the ceiling-mounted air-conditioning apparatus, and is bent into a polygonal shape. A heat exchanger is provided, wherein the heat exchanger has a configuration in which the portion projects toward the housing at a position corresponding to at least one side of the housing.

According to a fifteenth aspect of the present invention, in the heat exchanger, the heat exchanger protrudes toward the housing. It is characterized in that it is bent into a pentagonal shape including a part of it.

 According to the sixteenth aspect of the present invention, in the heat exchanger, a bending start position and a bending end position of the heat exchanger bent into the polygonal shape are connected by a narrow tube sheet. It is characterized by the following.

 According to a seventeenth aspect of the present invention, in the heat exchanger, each corner of the polygonal heat exchanger is bent using a common bending roller jig. You.

 According to an eighteenth aspect of the present invention, there is provided a drain pan which is disposed below a heat exchanger of a ceiling-embedded air conditioner and is formed by integrally forming a drain pan resin frame and styrene foam. A drain pan, wherein a boss that penetrates the polystyrene foam and faces the opposite side is formed in a resin frame, and an accessory is formed to be fixed to the boss.

 According to a nineteenth aspect of the present invention, in the drain pan, a reinforcing rib is formed around the boss.

 According to a twenty-fifth aspect of the present invention, in the drain pan, a rib for reinforcing a suction hole surrounding the suction hole formed in the styrene foam is formed in the resin frame.

 According to a twenty-first aspect of the present invention, in the drain pan, the suction hole reinforcing rib extends around a lead wire guiding recess formed around the suction hole. And BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 is a cross-sectional view showing an embodiment of an embedded ceiling air conditioner and a heat exchanger according to the present invention.

 FIG. 2 is a plan view of the air conditioner main body with the drain pan removed.

 FIG. 3 is a perspective view of the heat exchanger.

 FIG. 4 is a plan view of the air conditioner main body equipped with a drain pan.

 FIG. 5 is a sectional view taken along line VV of FIG.

FIG. 6A is a plan view of the resin frame, and FIG. 6B is a cross-sectional view of FIG. FIG. BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

 As shown in FIG. 1, the ceiling-embedded air conditioner of this embodiment has a box-shaped air conditioner body 1 made of sheet metal, and is suspended from a ceiling by a suspension bolt 2. The air conditioner body 1 is open at the bottom, and when embedded in the ceiling, this opening side faces the conditioned room. A motor 5 is fixed inside the air conditioner main body 1, and an impeller 7 is attached to a shaft of the motor 5. These make up the blower 9. A heat exchanger 11 bent in a polygonal shape is arranged so as to surround the blower 9, a drain pan 13 is arranged below the heat exchanger 11, and a bell mouth is provided on the drain pan 13. 1 4 are attached.

 A decorative panel 21 is attached to the lower surface of the air conditioner main body 1. The decorative panel 21 has an inlet 22 and an outlet 23 formed therein, and the inner side of the inlet 22. Is equipped with a filter 25.

 FIG. 2 is a plan view showing the air conditioner main body 1 with the drain pan 13 removed. In the present embodiment, the heat exchanger 11 is bent into a substantially pentagonal (polygonal) shape and disposed inside the air conditioner body 1.

 The three sides 11 A, 11 B, and 11 C of the heat exchanger 11 extend substantially parallel to the three sides 1 A, 1 B, and 1 C of the air conditioner main body (housing) 1, and the remaining sides extend. A part 11 D of the housing 1 is configured to protrude in a triangular shape on the side 1 D side of the housing 1 at a position corresponding to the side 1 D of the housing 1. As shown in FIG. 3, the heat exchanger 11 is composed of a fin-and-tube type heat exchanger which is double overlapped in the air flow direction indicated by the solid arrow. The corners A, B, C, and D of the exchanger are bent by the same roller (not shown) having a radius R set in a bending roller jig to form a pentagon (polygon). The heat exchanger 11 has a narrow tube sheet between the bending start position (one end of the heat exchanger) 11 K and the bending end position (the other end of the heat exchanger) 11 L. Are connected via

By the way, referring to FIG. 2, the space outside the heat exchanger 11 Class 2 7 ゃ It is necessary to secure a space for placing the drain pump 28, and in the space inside the heat exchanger 11 1, it is necessary to secure a space for placing the bell mouth 14 and the transmission box 45. There is. Moreover, in recent years, when the heat exchanger 11 is arranged in a narrow space in the housing 1, certain restrictions are imposed on the bending shape of the heat exchanger 11, while the heat transfer area is reduced as much as possible. It is required to increase the heat exchange capacity to obtain large heat exchange capacity.

 In the present embodiment, a part of the heat exchanger 11 is protruded toward the housing 1 (that is, a part of the heat exchanger 11D is protruded outward). The heat transfer area can be increased as compared with a configuration in which no overhang is made (that is, all sides are flat), and a relatively large space SI, By distributing the piping 27 and the drain pump 28 in S2, these devices can be stored efficiently.

 In addition, the distance between the bending start position 11 K and the bending end position 11 L of the heat exchanger 11 1 is made closer, and the connection is made with a narrow tube sheet 11 M to connect with a wide tube sheet. The heat transfer area can be increased by that much.

 In the above configuration, when the heat exchanger 11 is bent, it is bent by the same roller having the radius R, so that roller replacement is not required, thereby simplifying the manufacturing process of the heat exchanger 11 and reducing the manufacturing cost. .

 FIG. 4 is a plan view showing a state where a drain pan 13 is attached to the air-conditioning apparatus main body 1 shown in FIG. The air conditioner body 1 (indicated by a dashed line in FIG. 4) has a substantially rectangular internal outlet 41 on four sides, and the internal outlet 41 is provided with a decorative panel 21 shown in FIG. It communicates with the outlet 23 of In the drain pan 13, a protrusion 13 A projecting into the internal outlet 41 is formed at a position corresponding to a part 11 D of the heat exchanger 11.

In this configuration, a part 1 1D of the heat exchanger 11 extending to the housing 1 side slightly overlaps with the outlet 23 corresponding to the space outside the heat exchanger 11 Therefore, the above-mentioned protrusion 13 A of the drain pan 13 corresponding to the part 11 D faces the outlet 23. The protrusion 13 A has a large effect that the heat transfer area can be increased by projecting the portion 11 D so that the portion 11 D overlaps the outlet 23. Can be

 In this embodiment, as shown in FIG. 2, an auxiliary heater 43 may be arranged between the heat exchanger 11 and the blower 9 as shown by broken lines. In this case, the electrical components of the auxiliary heater 3 are supported by a tube sheet 11M that connects the bending start position 11K and the bending end position 11L of the heat exchanger 11 to each other. This eliminates the need for an extra support for supporting the electrical components of the auxiliary heater 43, thereby reducing manufacturing costs. As shown in FIGS. 2 and 4, a part 11 D of the heat exchanger 11 protrudes in a triangular shape on the housing 1 side. The electrical box 45 is formed by bending it into a substantially rectangular shape.

 This type of electrical box 45 is generally straight, so that the electrical box 45 protrudes greatly into the bell mouth 14 and reduces the suction area of the blower 9. In the present embodiment, the electrical box 45 is bent into a substantially rectangular shape along the shape of the part 11D of the heat exchanger 11, so that the electrical box 45 is stretched inside the bell mouth 14. As a result, a large suction area of the blower 9 is secured.

Next, the structure of the above-described drain pan will be described in more detail.

FIG. 5 is a sectional view taken along line VV of the drain pan 13 shown in FIG.

 This drain pan 13 is composed of a drain pan resin frame 51 having a thickness of about 2 mm, which constitutes substantially the entire area of the upper surface of the drain pan 13, and having a concave and convex shape formed into a predetermined shape. The styrofoam 53 and the styrofoam 53 constituting the entire shape of 13 are integrally formed.

 At a substantially central portion of the drain pan 13, a suction hole 55 facing the suction port of the blower 9 is formed, and the bell mouth 14 of the blower 9 is fitted into the suction hole 55. The bell mouth 14 is fixed to the drain pan 13 with a plurality of screws 56 as shown in FIG. An electrical box 45 is fixed to the drain pan 13 using a plurality of screws 58.

 FIG. 6A is a plan view of the drain pan sheet resin frame 51, and FIG. 6B is a cross-sectional view taken along the line BB of FIG. 6A.

As shown in FIG. 5, FIG. 6A and FIG. 6B, the styrofoam 53 is passed through a resin frame 51 having a thickness of about 2 mm, and on a surface opposite to the styrofoam 53, Screw receiving bosses 61 facing the head are integrally formed in a number corresponding to the number of screws 56, 58. The screw 56 for fixing the bell mouth 14 and the screw 58 for fixing the electrical box 45 are formed integrally with the resin frame 51, for example, as shown in FIG. 6B. It is screwed to the boss 6 1 for the received screw. In this configuration, the work of embedding the insert metal fittings for screwing the bell mouth 14 and the electrical box 45 into the styrofoam 53 is unnecessary, and the fixing work efficiency can be improved.

 Further, as shown in FIGS. 6A and 6B, a reinforcing rib 63 is formed around the boss 61, and the boss 61 and the resin frame 51 are reinforced. In addition, the resin frame 51 has a suction hole reinforcing rib 64 surrounding the suction hole 55 formed in the styrofoam 53 to reinforce the styrofoam suction hole 55. Around the suction hole 55 of the Styrofoam 53, a substantially U-shaped lead wire guide recess hole 65 for drawing a lead wire of the auxiliary heater 43 (FIG. 2) is formed. A recess hole reinforcing rib 67 extends around the hole 65, and the recess hole reinforcing rib 67 is formed integrally with the resin frame 51.

 In this configuration, the strength of the drain pan 13 can be increased because the boss 61, the ribs 64 for reinforcing the suction holes, and the ribs 67 for reinforcing the dent holes are integrally formed with the resin frame 51. it can.

 As described above, the present invention has been described based on one embodiment, but it is apparent that the present invention is not limited to this. For example, the shape of the heat exchanger of the present invention is a substantially pentagon, but the shape is not limited to this. The shape without the mark may be arbitrarily selected. Industrial applicability

In the ceiling-mounted air conditioner of the present invention, the heat exchanger can be efficiently housed in a narrow space in the housing, and the heat transfer area thereof can be increased. In addition, by utilizing the space formed between the heat exchanger and the box and the space formed inside the heat exchanger, various devices such as piping, drain pumps, and transmission boxes can be efficiently stored in a compact manner. Can be paid. Further, for example, the bell mouse of a blower and an electrical box can be easily attached to the drain pan.

Claims

The scope of the claims 1. In a ceiling-mounted air conditioner in which a blower and a heat exchanger surrounding it are arranged in a housing,  An embedded ceiling air conditioner, characterized in that the heat exchanger is bent into a polygonal shape, and a part of the heat exchanger projects toward the housing.  2. A part of the heat exchanger is extended toward the housing at a position corresponding to at least one side of the housing, so that at least two devices are provided on one side of the housing and a part of the heat exchanger. 2. The ceiling-mounted air conditioner according to claim 1, wherein a storage space is formed.  3. The ceiling-mounted air conditioner according to claim 2, wherein piping and a drain pump of the heat exchanger are arranged in the two device accommodation spaces, respectively.  4. The embedded ceiling air conditioner according to claim 1, wherein the heat exchanger is bent into a substantially pentagonal shape including a part of the heat exchanger projecting to the housing side. 5. The ceiling-embedded air according to claim 1, wherein the bending start position and the bending end position of the heat exchanger bent in a polygonal shape are connected by a narrow tube sheet. Harmony equipment.  6. An auxiliary heater is further disposed between the heat exchanger and the blower, and the electrical component of the auxiliary heater connects the bending start position and the bending end position of the polygonal heat exchanger. 6. The embedded ceiling air conditioner according to claim 5, wherein the air conditioner is supported by a plate.  7. The ceiling-embedded air conditioner according to claim 1, wherein each corner of the polygonal heat exchanger is bent using a common bending roller jig.  8. The ceiling according to claim 1, wherein a part of the heat exchanger projecting to the housing side overlaps with an outlet arranged to face a space outside the heat exchanger. Embedded air conditioner. 9. Below the heat exchanger, a drain pan formed by integrally forming a resin frame for a drain pan sheet and a foam foam nozzle is disposed, and a substantially central portion of the drain pan is provided with a front end. A suction hole facing the suction port of the blower is formed, a boss is formed in the resin frame so as to penetrate the styrofoam and faces the opposite surface, and the bell boss of the blower is fixed to the boss. 2. The ceiling-mounted air conditioner according to claim 1, wherein:  10. The ceiling-embedded air conditioner according to claim 9, wherein an electrical box is fixed to the boss.  11. The ceiling-mounted air conditioner according to claim 9, wherein a reinforcing rib is formed around the boss.  12. The ceiling-embedded air conditioner according to claim 9, wherein a rib for reinforcing a suction hole surrounding the suction hole formed in the polystyrene foam is formed on the resin frame.  13. The ceiling embedding according to claim 12, wherein the suction hole reinforcing rib extends around a lead line guide recess formed around the suction hole. Type air conditioner.  1 4. A configuration in which the blower is arranged inside the housing of the ceiling-mounted air conditioner so as to surround the blower, is bent into a polygonal shape, and a part of the air conditioner extends toward the housing at a position corresponding to at least one side of the housing. A heat exchanger comprising:  15. The heat exchanger according to claim 14, wherein the heat exchanger is bent into a pentagonal shape including a part protruding toward the housing.  16. The heat exchange according to claim 14, wherein a bending start position and a bending end position of the heat exchanger bent in the polygonal shape are connected by a narrow tube sheet. vessel.  17. The heat exchanger according to claim 14, wherein each corner of the polygonal heat exchanger is bent using a common bending roller jig.  18. A drain pan which is disposed below the heat exchanger of the ceiling-embedded air conditioner and is formed by integrally molding a drain pan resin frame and polystyrene foam, wherein the polystyrene foam is passed through the resin frame. A drain pan having a boss facing the opposite surface, and formed so that an accessory can be fixed to the boss. 1 9. A reinforcing rib is formed around the boss. 8  20. The drain pan according to claim 18, wherein a suction hole reinforcing rib surrounding the suction hole formed in the styrene foam is formed in the resin frame.  21. The door according to claim 20, wherein the suction hole reinforcing rib extends around a lead line guide recess formed around the suction hole.