JP3124268B1 - Indoor unit structure of air conditioner - Google Patents

Abstract

To provide an indoor unit structure of an air conditioner in which washing water and dew water of a heat exchanger are prevented from leaking out of a housing through a through hole of a refrigerant pipe. An air conditioner in which a heat exchanger and a blower having a drain pan (4) are installed in a housing, and a refrigerant pipe (such as an outlet pipe (32)) for supplying a refrigerant to the heat exchanger is provided through the housing (2). The pipe insertion part 41 for passing the outlet pipe 32 is provided in a portion where the outlet pipe 32 penetrates the housing 2.
Is smaller than the outer diameter of the outlet pipe, and
A lip portion 44 provided with an outer flange portion 42 and an inner flange portion 43 facing each other at a surface distance substantially equal to The water-sealed grommet 40 made of soft rubber was installed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor unit structure of an air conditioner, and more particularly to a water sealing (waterproof) structure in which a refrigerant pipe penetrates a housing.

[0002]

2. Description of the Related Art A ceiling-mounted air conditioner in which an indoor unit is embedded in a ceiling and installed is conventionally used, and a conventional indoor unit structure will be briefly described below with reference to the drawings. Here, FIG. 5 is a cross-sectional plan view of a main part showing an indoor unit structure of the ceiling-mounted air conditioner, and FIG.
-A sectional view, FIG. 7 is a view on arrow B in FIG. 5 , and FIG. 8 is C- in FIG.
It is C sectional drawing.

An indoor unit 1 embedded in a ceiling of a room or the like to be air-conditioned is provided with a housing 2 and a heat exchanger 3.
, Drain pan 4, blower 5, motor 6 for blower
, The air guide plate 10, the suction grill 11, the blow grill 12, and the decorative panel 13 as main components. The heat exchanger 3 is connected to an inlet pipe 31 and an outlet pipe 32 of a refrigerant flow path (refrigerant pipe), and is connected to an outdoor unit (not shown) including a compressor, an outdoor heat exchanger, and the like. I have. The housing 2 has a metal plate 21 serving as a strength member at the center.
Are arranged, and the inside and outside of the metal plate 21 are covered with a heat insulating material 22 to be integrally formed. A through hole 2a for an inlet pipe 31 and an outlet pipe 32 is provided on a side surface of the housing 2, and the outer periphery of the inlet pipe 31 passing through the through hole 2a is covered with a heat insulating pipe 33 formed of a soft heat insulating material. The outer periphery of the outlet tube 32 is also partially covered with a heat insulating tube 34 made of a soft heat insulating material.

[0004] The above-mentioned gap of the through-hole 2a is closed by a holding plate 35 to provide wind shielding and heat insulation.
Is formed by integrally forming the inside and outside of a metal plate 36 which is a strength member disposed at the center with a heat insulating material 37. In addition,
Insulated pipe 33 of inlet pipe 31 and insulated pipe 34 of outlet pipe 32
Are supported by the end of the through hole 2a of the housing 2 and the end of the pressing plate 35 in a state sandwiched from above and below,
It passes through the side surface of the housing 2.

[0005]

Incidentally, in the ceiling-mounted type air conditioner of the above construction, dust or the like adheres to the heat exchanger 3 of the indoor unit 1 as a result of being used for a long period of time, so that the heat exchange capacity is reduced. When the temperature decreases, the heat exchanger 3 is cleaned. The cleaning of the heat exchanger 3 is performed by the indoor unit 1.
Are removed in advance, and a washing water collecting duct (not shown) is arranged below the indoor unit 1 to wash the washing by injecting washing water into the heat exchanger 3. There is a problem that water leaks from the through-holes 2a of the inlet pipe 31 and the outlet pipe 32, and stains the outside of the housing 2.

In cooling operation, the heat exchanger 3
A portion close to the temperature becomes an atmosphere having a dew point temperature or lower, and warm air in the room, that is, air containing humidity is blown by the blower 5. As a result, warm air comes into contact with the inlet pipe 31 and the outlet pipe 32 to generate dew.
There is also a problem that water leaks to the outside through the through hole 2a of the casing 2 along the first and outlet pipes 32.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to allow washing water and dew water of a heat exchanger to leak out of a housing through through holes of an inlet pipe and an outlet pipe. It is an object of the present invention to provide an indoor unit structure of an air conditioner in which the air conditioner is prevented.

[0008]

The present invention employs the following means to solve the above-mentioned problems. The indoor unit structure of an air conditioner according to claim 1, wherein a heat exchanger having a drain pan and a blower are installed in a housing, and a refrigerant pipe for supplying a refrigerant to the heat exchanger is provided through the housing. An indoor unit structure of a ceiling-embedded type air conditioner, wherein an inner diameter of a pipe penetration portion for passing the refrigerant pipe is smaller than an outer diameter of the refrigerant pipe in a casing penetration part of the refrigerant pipe; comprising a flange portion facing in substantially matches interplanar distance in the thickness, the collar
The housing was sandwiched between the opposing surfaces of the part and attached at a predetermined position.
In this state, a water-sealing grommet made of soft rubber and having a lip protruding from the vicinity of the flange in the housing so as to be in close contact with the inner surface of the housing is mounted. In this case, a drain piece may be added to a lower portion of the lip portion, and a water receiving portion of the drain pan may be extended below the drain piece.

According to such an indoor unit structure of the air conditioner, the water seal grommet is mounted, so that the lip portion is in close contact with the inner surface of the housing, so that leakage of water from inside to outside of the housing can be prevented. In addition, a drain piece is additionally provided on the lip portion, and the water receiving part of the drain pan is extended to be provided below the drain piece, so that the condensed water can be guided by the drain piece and dropped into the water receiving part. .

[0010]

[0011]

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an indoor unit structure of an air conditioner according to the present invention will be described below with reference to the drawings. The structure of the indoor unit 1 is not shown in FIG.
7 are the same as those in the conventional example shown in FIG. 7 , and therefore, the same portions are denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 1 is a sectional view of a main part according to a first embodiment of the present invention, and FIG. 8 (CC of FIG. 7) in a conventional example is shown.
Sectional view) . In this FIG.
Is a housing, 4 is a drain pan for collecting condensed water of the heat exchanger 3 (see FIG. 6 ), 21 is a metal plate forming the housing 2, 22 is a heat insulating material also forming the housing 2, and 32 is an outlet pipe ( Refrigerant pipe), 35 is a holding plate, 36 is a metal plate of the holding plate 35,
Reference numeral 37 denotes a heat insulating material for the holding plate 35.

In the first embodiment, the refrigerant pipe is
2 shows an example in which a water sealing grommet 40 made of soft rubber and having a cross-sectional shape (shape before mounting) shown in FIG. In the following description, an example in which the water seal grommet 40 is mounted on the outlet pipe 32 as the refrigerant pipe will be described. However, the same water seal grommet 40 is mounted on the inlet pipe 31 which is the other refrigerant pipe. Have been.

The housing 2 has a metal plate 2 serving as a strength member at the center.
1 is a box-shaped member integrally formed by covering the inside and outside of the metal plate 21 with a heat insulating material 22, and a refrigerant pipe serving as a refrigerant passage penetrates a side surface (side wall) of the housing 2. The refrigerant pipe includes an inlet pipe 31 for supplying the refrigerant from the outdoor unit (not shown) to the heat exchanger 3 and an outlet pipe 32 for returning the refrigerant after heat exchange in the heat exchanger 3 to the outdoor unit (not shown). Yes, all the refrigerant pipes pass through the through-hole 2a. Further, the holding plate 35 for closing the gap of the through hole 2a is disposed at the center portion and the inside and outside of the metal plate 35 serving as a strength member are covered with the heat insulating material 3.
7 and has a function of wind shielding and heat insulation. That is, the holding plate 35 is a plate-like member that forms a part of the side surface of the housing 2.

The water seal grommet 40 described above is a hollow cylindrical component formed by molding soft rubber. The hollow portion of the water seal grommet 40 is a portion for inserting and mounting the outlet tube 32, and is hereinafter referred to as a tube insertion portion 41. The inner diameter of the tube insertion portion 41 is set to be smaller than the outer diameter of the outlet tube 32, and the fitting is set so as to be in close contact with the outlet tube 32 as a closing dimension. That is, the tube insertion portion 41 is expanded in diameter by the elasticity of soft rubber as a material of the water seal grommet 40 and attached to the outlet tube 32, and the inner peripheral surface of the tube insertion portion 41 is in close contact with the outer peripheral surface of the outlet tube 32. Is held. For this reason, the space between the outlet pipe 32 and the pipe insertion portion 41 is in a water-tight state in which water does not leak.

The water sealing grommet 40 is provided with a pair of flanges 42 and 43 facing each other in the axial direction. One flange 42 is provided at a cylindrical end outside the housing 2 and is hereinafter referred to as an outer flange 42. The other collar 43 is
It is provided on the inside from the outer flange 42 by a distance substantially corresponding to the thickness L of the penetrating portion of the housing 2 and the holding plate 35, and is hereinafter referred to as an inner flange 43. That is, the outer flange portion 42 and the inner flange portion 43
The side member of the housing 2 is sandwiched between the surfaces facing each other.

Further, the inner flange 4 of the water seal grommet 40
3 from the vicinity of the lip portion 44 so as to be in close contact with the inner surface of the housing 2.
Are protruding. The lip portion 44 is in the form of a disc made of soft rubber, and its tip (outer peripheral end) 44a faces the outer flange 42 in a natural state before mounting, and the distance between the tip 44a and the outer flange 42. L1 is the thickness of the penetrating portion (distance between flange surfaces) L
It is set smaller (L1 <L). For this reason, when the water sealing grommet 40 is attached to the predetermined position shown in FIG. 1, the spring effect by the elasticity of the soft rubber is exerted, and the front end portion 44a of the lip portion 44 becomes the inner surface of the housing 2 and the holding plate 35. A water-sealed state closely adhered to can be maintained.

The operation of the first embodiment will be described below. The water seal grommet 40 made of soft rubber is used for the tube insertion portion 4.
1 is smaller than the outer diameter of the outlet tube 32,
Due to elasticity, it comes into close contact with the outer peripheral surface of the outlet pipe 32. The distance between the outer flange 42 and the inner flange 43 is substantially equal to the thickness L of the penetrating portion of the housing 2.
a comes into close contact with the side surface of the housing 2 by the spring effect. Therefore, the structure between the outlet pipe 32 and the water-sealed grommet 40 and between the water-sealed grommet 40 and the housing 2 are both water-sealed, so that water leakage from the inside to the outside of the housing 2 can be prevented. it can. In addition, since the water pipe grommet of the same configuration is attached to the inlet pipe 31, the above-described outlet pipe 3 is used.
Water leakage can be prevented similarly to 2.

For this reason, when cleaning the heat exchanger 3 (see FIGS. 5 and 6 ), even if the cleaning water is sprayed on the heat exchanger 3, the water flows from the through portions of the inlet pipe 31 and the outlet pipe 32 of the housing 2. Leakage of the cleaning water can be prevented, and therefore, the outside of the housing 2 does not become dirty. In the cooling operation, a portion near the heat exchanger 3 has an atmosphere having a temperature equal to or lower than the dew point temperature, and warm air in the room, that is, air containing humidity is blown by the blower 5, so that warm air is supplied to the inlet pipe 31 and the outlet pipe 32. Dew is generated when the air comes in contact with the condensed water,
Flow through the outlet pipe 32 and the water seal grommet 40
Therefore, it is possible to prevent water from leaking outside through the through portion of the housing 2.

Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 3 shows the first showing the outlet pipe penetration.
FIG. 4 is a cross-sectional view corresponding to FIG. 1 of the embodiment, and FIG. 4 is a front view showing the shape of the water seal grommet 40A as viewed from the inside of the housing;
The same portions are denoted by the same reference numerals, and detailed description thereof will be omitted. In the second embodiment, the water seal grommet 40A
A different point from the first embodiment is that a water drainage piece 45 is provided. The drainage piece 45 is added to a lower portion of the lip portion 44 and has a water guide surface formed inward from the lip portion 44. A water receiving portion 4a of a drain pan 4, which is a condensed water receiving portion of the heat exchanger 3, is disposed below the water draining piece 45 in an extended manner.

With such a configuration, the following operation occurs in addition to the above-described first embodiment. That is,
In the cooling operation, the portion close to the heat exchanger 3 has an atmosphere below the dew point temperature, and warm air in the room, that is, air containing humidity, is blown by the blower 5.
Warm air comes into contact with 1 and outlet pipe 32 to generate dew.
The condensed water that has condensed tries to leak to the outside through the through-hole 2a of the housing 2 along the inlet pipe 31 and the outlet pipe 32.
Since a drain piece 45 is added to a lower portion of the inner flange 43 (lip portion 44) of the grommet 40A, this condensed water falls along the drain piece 45 and falls to a water receiving portion 4a provided below the drain piece 45. Then, it is discharged to the outside via a drain pipe (not shown) connected to the drain pan 4. Therefore, it is possible to more reliably and effectively prevent the condensed water that has condensed from leaking from the through hole 2a of the housing 2 to the outside of the housing through the inlet pipe 31 and the outlet pipe 32.

[0023]

[0024]

[0025]

[0026]

The embodiments described above are not limited to those shown in the drawings, and various modifications can be made without departing from the essence of the present invention. For example, a plurality of lip portions 44 of the water-sealed grommet 40 in the first embodiment may be arranged in the circumferential direction, whereby a double or triple contact portion is formed to more reliably Water sealing function is obtained. Further, by extending the drainage pieces in the second embodiment to the water receiving portion of the drain pan 4,
An even more reliable water guiding function can be obtained.

[0028]

According to the indoor unit structure of the air conditioner of the present invention described above, the following effects can be obtained. (1) A water-sealed grommet is installed in the through-hole of the refrigerant pipe, preventing the washing water of the heat exchanger and the condensed water that has condensed from leaking out of the housing along the refrigerant pipe or through the through-hole. it can. (2) Drain pieces are added to the lower part of the lip section to guide the washing water and condensed water to the extended drain pan water receiving section, so that these waters can be reliably discharged from the condensed water drainage system of the heat exchanger. Can be drained to

[Brief description of the drawings]

FIG. 1 is a cross-sectional view (a cross-sectional view taken along line CC in FIG . 7 ) of a main part of an indoor unit structure of an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a natural state before the water seal grommet of FIG. 1 is mounted.

FIG. 3 is a cross-sectional view (a cross-sectional view taken along line CC of FIG . 7 ) of a main part of the indoor unit structure of the air conditioner according to the second embodiment of the present invention.

FIG. 4 is a front view of the water seal grommet of FIG. 3 as viewed from the inside of the housing.

FIG. 5 is an indoor unit of a conventional ceiling-mounted air conditioner.
It is a principal part sectional plan view which shows a structure.

6 is a sectional view taken along line AA of FIG.

FIG. 7 is a view as seen from the arrow B in FIG . 5;

FIG. 8 is a sectional view taken along the line CC of FIG . 7;

Claims (2)

(57) [Claims] An indoor unit structure of an air conditioner in which a heat exchanger having a drain pan and a blower are installed in a housing, and a refrigerant pipe for supplying a refrigerant to the heat exchanger is provided through the housing. And a flange that faces the housing through portion of the refrigerant pipe at an inner surface of a pipe insertion portion through which the refrigerant pipe is inserted is smaller than an outer diameter of the refrigerant pipe and has a face-to-face distance substantially matching the thickness of the through portion of the housing. Part,
The casing is sandwiched between facing surfaces of the flange portion and attached to a predetermined position.
Indoor unit structure of an air conditioner characterized by being fitted with water sealing grommet made of soft rubber having a lip portion which projects to at only a state in close contact with the casing surface from the vicinity of the flange portion of the housing. 2. The indoor unit for an air conditioner according to claim 1, wherein a drain piece is added to a lower portion of the lip portion, and a water receiving portion of the drain pan is extended below the drain piece. Construction.