JP2004093007A - Ceiling embedded air conditioner and drain pan - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ceiling embedded air conditioner and a drain pan capable of positively preventing a water leakage. <P>SOLUTION: A plug 31 for closing a drain pocket of the drain pan in the ceiling embedded air conditioner has a plurality of collars 32 having an outer diameter larger than the inner diameter of the drain pocket and continuous in the circumferential direction of the plug 31, at a portion inserted into the drain pocket. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a ceiling-mounted air conditioner and a drain pan.
[0002]
[Prior art]
2. Description of the Related Art In general, an embedded ceiling air conditioner in which a heat exchanger is arranged so as to surround a blower provided in a housing and a drain pan is arranged below the heat exchanger is known. Water condensed in the heat exchanger is stored in the drain pan, and is discharged to the outside by, for example, sucking it out with a drain pump. In addition, a drain pan is generally formed with a drain hole, a so-called drain pocket, and the hole is usually closed by a rubber stopper.
[0003]
[Problems to be solved by the invention]
However, conventionally, since a substantially cylindrical rubber stopper having a flat side surface is used, water may leak due to variations in the dimensions of the rubber stopper and variations in the inner diameter of the drain pocket.
[0004]
Conventionally, the drain pan is made of Styrofoam and the drain pocket is formed by forming a through hole in this Styrofoam.The inner peripheral member of the drain pocket is made of Styrofoam, and the inner diameter is simple due to impact etc. There was also a problem that it was changed to.
[0005]
The present invention has been made in view of the above circumstances, and has as its object to provide a ceiling-embedded air conditioner and a drain pan that can reliably prevent water leakage.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is arranged such that a heat exchanger is arranged so as to surround a blower provided in a housing, and a drain pan is arranged below the heat exchanger. In the ceiling-embedded air conditioner in which the formed through-hole is closed by a plug, the plug has a portion inserted into the through-hole, a portion larger than the inner diameter of the through-hole, and a portion smaller than the portion. It is characterized by having. According to this configuration, the adhesion between the plug and the through hole is increased by a portion larger than the inner diameter of the through hole of the plug, and water leakage from the drain pan can be prevented.
[0007]
According to a second aspect of the present invention, in the configuration of the first aspect, the plug has a plurality of the large portion and the small portion. According to this configuration, the adhesion between the stopper and the through hole is further improved, and water leakage from the drain pan can be reliably prevented.
[0008]
According to a third aspect of the present invention, in the configuration according to the first or second aspect, the drain pan is formed by integrally molding a resin frame and styrene foam, and a part of the resin frame passes through the drain pan. It is characterized in that it penetrates the hole and faces the opposite surface and also serves as an inner peripheral member of the through hole. According to this configuration, since the plug is inserted into the through hole formed of the resin frame, the adhesion between the plug and the through hole is further improved, and water leakage from the drain pan can be reliably prevented.
[0009]
According to a fourth aspect of the present invention, there is provided a drain pan having a through hole, wherein the through hole is closed by a stopper. And a part smaller than the part. According to this configuration, the adhesion between the plug and the through hole is increased by a portion larger than the inner diameter of the through hole of the plug, and water leakage from the drain pan can be prevented.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below show one aspect of the present invention, and do not limit the present invention, and can be arbitrarily changed within the scope of the present invention.
[0011]
As shown in FIG. 1, the ceiling-mounted air conditioner has a box-shaped air conditioner main body 1 made of sheet metal, and is suspended from the ceiling by suspension bolts 2. The air conditioner main body 1 is installed such that its lower side is open and when it is embedded in a 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 constitute the blower 9. A heat exchanger 11 bent in a polygonal shape is arranged so as to surround the blower 9, and a drain pan 13 is arranged below the heat exchanger 11, and a bell mouth 14 is attached to the drain pan 13. I have.
[0012]
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 a filter 25 is mounted inside the inlet 22. ing.
[0013]
FIG. 2 is a plan view showing the air conditioner main body 1 with the drain pan 13 removed. The above-described heat exchanger 11 is bent into a substantially pentagonal (polygonal) shape and disposed inside the air conditioner main body 1.
[0014]
The three sides 11A, 11B, and 11C of the heat exchanger 11 extend substantially parallel to the three sides 1A, 1B, and 1C of the air conditioner main body (housing) 1, and the remaining part 11D is At a position corresponding to one side 1D, the casing 1 is configured to protrude in a triangular shape on the one side 1D side. As shown in FIG. 3, the heat exchanger 11 is configured such that fin-and-tube heat exchangers are overlapped with each other in the direction of air flow indicated by solid arrows, and The corners A, B, C, and D are bent by the same roller (not shown) having a radius R set in a bending roller jig to form a pentagonal (polygonal) shape. In the heat exchanger 11, the bending start position 11K and the bending end position 11L are connected via a narrow tube sheet 11M.
[0015]
Referring to FIG. 2, pipes 27 and a drain pump 28 are arranged in spaces S1 and S2 outside heat exchanger 11. In the present configuration, by adopting a configuration in which a part 1D of the heat exchanger 11 extends toward the housing 1, the heat transfer area can be increased as compared with a configuration in which a part does not extend. Relatively large spaces S1 and S2 on both sides of the side 1D can be provided. As a result, the pipes 27 and the drain pump 28 can be dispersedly arranged in the spaces S1 and S2 with a margin, and these devices can be stored efficiently.
[0016]
Also, since the part 11D of the heat exchanger 11 projects in a triangular shape toward the housing 1, the electrical box 45 is formed by bending the shape of the electrical box 45 along the shape of the part 11D. Have been. This type of electrical box 45 is generally linear, 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 in a substantially rectangular shape along the shape of the part 11D of the heat exchanger 11, so that the electrical box 45 does not protrude into the bell mouth 14, and 9 is ensured with a large suction area.
[0017]
In the air conditioner body 1, an auxiliary heater 43 is optionally arranged between the heat exchanger 11 and the blower 9 as shown by a broken line.
[0018]
FIG. 4 is a plan view showing a state in which a drain pan 13 is attached to the air conditioner 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 this internal outlet 41 communicates with the outlet 23 of the decorative panel 21 shown in FIG. are doing. The drain pan 13 is integrally formed with a protrusion 13A that protrudes inside the internal outlet 41 at a position corresponding to a part 11D of the heat exchanger 11.
[0019]
In the present configuration, since the part 11D of the heat exchanger 11 projecting toward the housing 1 slightly overlaps with the outlet 23 corresponding to the space outside the heat exchanger 11, the outlet 11 Although the projection 13A of the drain pan 13 corresponding to the part 11D faces, the projection 13A is slightly conspicuous when the air conditioner body 1 is viewed from below. By projecting so as to overlap with the outlet 23, a great advantage that the heat transfer area can be increased can be obtained.
[0020]
The drain pan 13 is formed with a through hole 30 functioning as a drain pocket, and is formed so that the periphery of the through hole 30 is the deepest. Thereby, the water condensed in the heat exchanger 11 is guided to the through-hole 30 side. Normally, a stopper 31 is fitted into the through hole 30, and water stored around the through hole 30 is sucked out by a drain pump 28 (see FIG. 2). Here, FIG. 5 is a view showing the plug 31 to be fitted into the through hole 30.
[0021]
The stopper 31 is formed by molding an elastic material such as rubber, and is fitted into the through hole 30 of the drain pan 13 from below. A plurality of flanges 32 that are continuous in the circumferential direction of the plug 31 are formed at predetermined intervals in a portion of the plug 31 that is inserted into the through hole 30. The outer diameter of the collar 32 is larger than the inner diameter of the through-hole 30. When the plug 31 is inserted into the through-hole 30, the collar 32 is elastically deformed by the through-hole 30 and comes into close contact with the through-hole 30. As a result, it is possible to avoid a gap between the plug 31 and the through hole 30, and it is possible to securely fix the plug 31 to the through hole 30.
[0022]
Further, since the collar 32 is easily elastically deformed as described above, the outer diameter of the stopper 31 (the outer diameter of the collar 32) and the diameter of the through hole 30 are smaller than those in the case where a stopper having a flat side surface is used as in the related art. Even if the amount of fitting (tight fit) with the inner diameter is increased, it becomes easy to insert the plug 31 into the through hole 30. Therefore, it is possible to satisfy the conflicting problems of improving the adhesion between the plug 31 and the through hole 30 and facilitating the operation of inserting and removing the plug 31.
[0023]
Further, since the collar 32 is formed so as to be continuous in the circumferential direction of the stopper 31, if the collar is formed in a spiral shape like a screw thread, water between the collars leaks, This configuration has an advantage that water does not leak even if water exists between the collars 32.
[0024]
Further, a deep hole 33 is formed at the tip of the stopper 31. The bottom surface 34 of the deep hole 33 is located at the lowermost surface of the drain pan 13 when the stopper 31 is inserted into the drain pan 13. Therefore, by disposing the suction port of the drain pump 28 close to the bottom surface 34 of the deep hole 33 (see FIG. 2), the lowermost surface of the suction port can be lowered, and the water stored in the drain pan 13 is almost completely sucked out. be able to. Thus, it is possible to avoid a situation in which water drops from the through hole 30 when the stopper 31 is removed. In other words, the outer diameter of the plug 31 is formed so large that the suction hole of the drain pump 28 enters the deep hole 33. If a conventional plug with a flat side is formed to have an outer diameter that satisfies the above conditions, the plug becomes heavier and the water pressure increases, so that the difference in the inner diameter of the through hole 30 (the amount of interference fit) is reduced. You need to take a lot. However, if a conventional stopper has a sufficient difference in inner diameter, there is a problem that it becomes difficult to insert the stopper into the through hole 30. Therefore, the plug 31 of the present embodiment also has an advantage that it can cope with an increase in the diameter of the through-hole 30 while satisfying the improvement of the adhesion between the plug 31 and the through-hole 30 and the easiness of the operation of inserting and removing the plug 31. is there.
[0025]
FIG. 6 is a sectional view taken along line VV of the drain pan 13 shown in FIG.
The drain pan 13 includes a drain sheet resin frame 51 having a thickness of about 2 mm, which forms substantially the entire upper surface of the drain pan 13, and is formed into a concave and convex shape in a predetermined shape. The styrofoam 53 is integrally formed.
[0026]
A suction hole 55 facing the suction port of the blower 9 is formed substantially at the center of the drain pan 13, and the bell mouth 14 of the blower 9 is fitted into the suction hole 55. The bell mouth 14 is shown in FIG. As described above, it is fixed to the drain pan 13 using a plurality of screws 56. The electrical box 45 is fixed to the drain pan 13 using a plurality of screws 58.
[0027]
Here, in the drain pan 13 of the present configuration, the boss 60 corresponding to the screws 56 and 58 and the inner peripheral portion 30I (see FIG. 4) of the through hole 30 serving as the drain pocket are integrally formed on the drain sheet resin frame 51. The styrofoam 53 is filled around the boss 60 and the inner peripheral portion 30I to be molded. A plurality of screws 56 for fixing the bell mouth 14 and a plurality of screws 58 for fixing the electrical box 45 are provided on the boss 61 for receiving screws formed integrally with the resin frame 51 for the drain sheet. It is screwed against.
[0028]
Therefore, the work of embedding an insert fitting for screwing the bell mouth 14 and the electrical box 45 into the styrofoam 53 as in the related art is not required, and the fixing work efficiency can be improved.
[0029]
Further, since the stopper 31 is to be fitted into the inner peripheral portion 30I integrally formed with the drain sheet resin frame 51, the inner surface of the through-hole is smaller than that of the conventional styrene foam drain pan. The rigidity of the inner surface can be increased, and variations in the inner diameter of the through hole and dimensional changes due to impact can be reduced.
[0030]
Therefore, the adhesion between the flange 32 of the plug 31, the through hole 31, and the inner peripheral portion 30 </ b> I is increased, and it is possible to more reliably prevent the water stored in the drain pan 13 from leaking.
[0031]
In the above-described embodiment, the case where the three flanges 32 are formed in the stopper 31 has been described, but the number may be arbitrary. The plug 31 may have an arbitrary shape in a range in which the plug 31 has a portion larger than the inner diameter of the through hole 30 and a portion smaller than this portion as long as the plug 31 can be put in and out of the through hole 30. For example, as shown in FIG. 7, if the shape of the collar 32 is curved, the rigidity of the collar 32 can be further increased, and the adhesion between the collar 32 and the through hole 30 can be further improved. Also, as shown in FIG. 8, if the outer diameter of the collar 32 is gradually reduced toward the distal end of the plug 31, the plug 31 can be easily inserted into the through hole 31.
[0032]
【The invention's effect】
As described above, the present invention can improve the adhesion between the drain pocket and the stopper, so that water leakage can be reliably prevented.
[Brief description of the drawings]
FIG. 1 is a diagram showing an installation state of an air conditioner main body of an embedded ceiling air conditioner according to an embodiment of the present invention.
FIG. 2 is a plan view showing the air conditioner main body with a drain pan removed.
FIG. 3 is a perspective view showing a heat exchanger.
FIG. 4 is a plan view showing the air conditioner main body with a drain pan attached.
FIG. 5 is a view showing a stopper fitted into a drain pocket.
FIG. 6 is a sectional view taken along line VV of the drain pan shown in FIG.
FIG. 7 is a view showing a modified example of a plug fitted into a drain pocket.
FIG. 8 is a view showing a modified example of a plug fitted in a drain pocket.
[Explanation of symbols]
1 Air conditioner body (housing)
9 Blower 11 Heat Exchanger 13 Drain Pan 14 Bell Mouth 21 Decorative Panel 28 Drain Pump 30 Through Hole 30I Inner Perimeter of Through Hole 31 Plug 32 Collar 33 Deep Hole 45 Electrical Box 51 Resin Frame for Drain Sheet 53 Styrofoam 60 Boss

Claims (4)

A heat exchanger is arranged so as to surround the blower provided in the housing, a drain pan is arranged below the heat exchanger, and a through-hole formed in the drain pan is closed by a plug. In the apparatus, the plug has a portion inserted into the through-hole, a portion larger than the inner diameter of the through-hole, and a portion smaller than the inside diameter of the through-hole. The ceiling embedded type air conditioner according to claim 1, wherein the plug has a plurality of the large portions and a small portion. The drain pan is formed by integrally molding a resin frame and styrene foam, and a part of the resin frame passes through a through hole of the drain pan and faces the opposite surface, and also serves as an inner peripheral member of the through hole. The ceiling-embedded air conditioner according to claim 1 or 2, wherein: In a drain pan having a through hole, the through hole is closed by a plug, wherein the plug has a portion inserted into the through hole, a portion larger than the inner diameter of the through hole, and a portion smaller than the portion. A drain pan characterized by the following.

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