JP3222289B2 - Air conditioner anti-vibration device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control device for an air conditioner, and more particularly to a vibration control device for an air conditioner suitable for vibration control of an indoor unit.

[0002]

2. Description of the Related Art Some air conditioner indoor units have a heat exchanger. In this type of indoor unit, water droplets condensed in the heat exchanger are temporarily stored in a water receiver, and then the drainage is drained to the outside by a pump. A known example of this type is disclosed in
No. 7270.

[0003]

2. Description of the Related Art In an indoor unit of an air conditioner, a frame constituting an indoor unit main body is made to have a thin structure in order to reduce its weight. With the thin structure, a driving source such as a motor for driving a fan vibrates the frame having the thin structure, thereby generating noise. For this reason, noise countermeasures are required more than ever.

[0004] In view of such a situation, noise reduction is taken for the above-mentioned driving source, but noise reduction is not taken into consideration for the above-mentioned conventional drain pump. In particular, in the above-mentioned conventional drain pump, the electromagnetic excitation force of the pump driving motor and the fluid force accompanying the drain are transmitted to the housing via the pump supporting member. According to the frequency analysis result of the noise, frequency components of an even multiple of twice or four times the power supply frequency and frequency components of the fluid noise caused by the fluid force are generated, which are obstacles to noise reduction in the drain pump. ing. For this reason, there was a problem that the noise reduction of the indoor unit of the air conditioner was not sufficiently reduced.

[0005] It is an object of the present invention to provide a vibration isolator of an air conditioner having excellent vibration insulation characteristics of an indoor unit.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a drain treatment means having an air blowing / absorbing means, a heat exchange means, and a drain pump for treating drainage from the heat exchange means. In an indoor unit of an air conditioner having a supporting case, a drain pump driving motor of the drain processing unit and a drain pump supporting member supporting the drain pump driving member are attached via a vibration isolator, The anti-vibration structure is characterized in that a drain pump driving motor is fastened to the drain pump support member by a non-magnetic bolt via rubber.

[0007] Before Kibofu structure may drain pump driving motor is to so that is fastened by a non-magnetic bolt through the rubber to the drain pump support member of the non-magnetic.

The anti-vibration structure includes a drain pump driving mode.
Is fastened to the drain pump support member via three rubbers.
It is good to be. Also, as a non-magnetic bolt,
Using either stainless steel, aluminum or brass
Good.

[0009]

According to the above configuration, since the fluctuating magnetic field of the motor for driving the drain pump does not vibrate the bolt, the vibration transmitted from the motor for driving the drain pump to the drain pump supporting member can be reduced . As a result, the vibration is reduced transmitted to the housing, it is possible to significantly reduce the noise caused by the electromagnetic vibrations.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of an indoor unit provided with one embodiment of the apparatus of the present invention, and FIG. 2 is a longitudinal side view thereof. In these figures, a motor 7 for driving a fan 6 of the air blowing / absorbing means is attached to the housing 1 via an anti-vibration structure 30. The motor 7 and the fan 6 are connected to the upper vibration isolating element 1
5 and the lower vibration isolating element 19.

A heat exchanger 8 is arranged around the fan 6. This heat exchanger 8 is also attached to the housing 1. A water receiver 36 is provided below the heat exchanger 8. The drainage collected in the water receiver 36 is drained by a drain pump 37.
Is discharged outside.

A panel 38 which can be seen from the room is attached to the lower side of the housing 1. A heat insulating material is attached to the outside and inside of the housing 1 in order to insulate and prevent dew condensation due to a difference between the temperature inside the indoor unit and the temperature of the ceiling. However, the heat insulating material is not shown because it is not an important component of the present invention.

FIG. 3 shows an installed state of an indoor unit provided with the first embodiment of the apparatus of the present invention shown in FIG. 1. In this figure, the indoor unit is mounted on a ceiling by means of a hanging bracket 40 and a hanging rod 2. Suspended.

In the top plate 41 and the side plate 42 constituting the housing 1, a rising portion 43 for increasing the bending rigidity of the top plate 41 and the side plate 42 is provided at a portion extending from the top plate 41 to the suspension fitting 40 through the side plate 42. Is formed. This rising part 43
Are formed by convex portions protruding outward with respect to the surfaces of the top plate 41 and the side plate 42.

FIG. 4 is a perspective view showing the structure of the drain pump 37 shown in FIG. 1, and FIG. 5 is a partial sectional view thereof. In these figures, the drain pump 37 has a blade 53 for sucking up drainage 63 accumulated in the water receiver 36 and a drain pump driving motor 52 for driving the blade 53.

The blades 53 are provided in a cone-shaped housing 54. Drainage passes from the suction port 55 to the drain hose 61 through the housing, and is discharged from the discharge port to the outside.

The drain pump driving motor 52 has its foot 56 attached to a drain pump support member 59 by a non-magnetic bolt 57 via a vibration-proof rubber 58. Further, the drain pump support member 59 is attached to a top plate of the housing via a plate member (not shown).

Next, the operation of the embodiment of the apparatus of the present invention will be described.

The drainage collected in the water receiver 36 is drained by the drain pump 3
When the drain pump 37 is rotated in order to discharge the fluid to the outside by means of 7, a change in the magnetic attraction force, that is, the electromagnetic excitation force of the drain pump drive motor 52, occurs near the drain pump drive motor 52. 6, a frequency component (peak component) A of an even multiple of twice or four times the power supply frequency shown by the solid line of the noise characteristic in FIG. 6 is generated, and the peak force shown by the solid line in FIG. The frequency components B between the components A are generated. These frequency components are generated by forming the bolt 57 connecting the drain pump driving motor 52 and the drain pump support member 59 with a stainless steel material which is a non-magnetic material. As shown by the dotted line in FIG. 6, in particular, the peak component A can be reduced to the peak component C.

The noise characteristics shown in FIG. 6 are for the case where the motor drive power supply frequency is 50 Hz.

As described above, according to the present invention, a large noise reduction effect can be obtained when the bolt 57 is made of a magnetic material.

In the above-described embodiment, the bolt 57 is made of a non-magnetic material so as to avoid magnetic excitation external force. However, as another embodiment of the present invention, the drain pump support member 59 is made of a non-magnetic material. You may comprise.

The structure in which the drain pump supporting member 59 is separated from the drain pump driving motor 52 can reduce the external magnetic force. However, in this embodiment, even if there is no such structural consideration, the above-described drain is required. Only by selecting the material of the pump support member 59, the drain pump support member 5
9 can reduce the external magnetic force. That is, the vibration of the drain pump support member 59 can be reduced. Thereby, the noise of the air conditioner can be reduced.

The non-magnetic material used for the bolt 57 or the drain pump support member 59 has been described as a stainless steel material, but may be any of aluminum, brass and the like.

FIG. 7 shows still another embodiment of the apparatus of the present invention. In this embodiment, a drain pump support member 59 is provided.
Then, a damping material 80 made of a material having a large loss coefficient such as butyl rubber is attached thereto, and the bolt 57 and the drain pump support member 59 are made of a non-magnetic material.

As described above in connection with the vibration transmission path in the above-described embodiment, the demagnetization of the bolt 57 causes the drain pump driving motor 52 to move the drain pump support member 59.
However, the vibration of the drain pump support member 59 itself is not eliminated at all. This vibration is further transmitted to the housing 1 and the top plate 41 and becomes a vibration sound.
It can be reduced by 0. As a result, an air conditioner with lower noise can be realized.

If the damping member 80 is provided on the drain pump supporting member 59 as in this embodiment, a certain degree of noise reduction can be realized even if the bolt 57 is not a non-magnetic material.

FIG. 8 shows another embodiment of the apparatus according to the present invention.
0 is added. The mass 70 is fixed to the drain pump support member 59 by a non-magnetic bolt 71.

According to this embodiment, a certain amount of vibration is transmitted from the drain pump driving motor 52 to the drain pump support member 59, as described above with respect to the vibration transmission path around the drain pump. Vibrates. Vibrating drain pump support member 59 and mass 70
And friction occurs between them, and the friction attenuates the vibration. Thus, the vibration of the drain pump support member 59 can be suppressed to a small level, so that an air conditioner with low noise can be realized.

If the mass 70 is provided on the drain pump supporting member 59 as in this embodiment, a certain degree of noise reduction can be realized even if the bolt 57 is not a non-magnetic material.

FIG. 9 shows still another embodiment of the apparatus of the present invention. In this embodiment, a member 72 containing a granular material 73 is provided on a drain pump support member 59. That is, the mass 70 of the embodiment shown in FIG.

According to this embodiment, the vibration of the drain pump supporting member 59 is attenuated by the collision or friction of the granular material. Thereby, the drain pump support member 59
Since the vibration of the air conditioner can be reduced, an air conditioner with low noise can be realized.

Although the anti-vibration rubber itself has not been mentioned so far, in consideration of the stability of the drain pump 37, the drain pump 37 uses the three anti-vibration rubbers 58 for the drain pump support member 59. Supported.

FIG. 10 shows another embodiment of the apparatus of the present invention. In this embodiment, the drain pump 37 is covered with a magnetic shield member 74 (magnetic material) that blocks the magnetic external force itself of the drain pump 37.

In this embodiment, similarly to the above-described embodiment, the magnetic excitation external force can be avoided by the shield member 74, and the noise of the air conditioner can be reduced.

Further, in the above-described embodiment, the vibration damping structure around the drain pump has been described. However, this vibration damping structure may be applied to a support structure for a fan driving motor of an indoor unit. That is, the vibration isolating structure 30 of the motor 7 shown in FIG.
The motor 7 may be fastened by a non-magnetic bolt.

[0038]

According to the present invention, the vibration caused by the fluctuating magnetic field of the motor for driving the drain pump provided in the indoor unit can be reduced. As a result, the vibration transmitted to the housing is reduced, the noise due to the electromagnetic vibration can be greatly reduced, and a low-noise air conditioner excellent in vibration insulation characteristics can be provided.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of an indoor unit of an air conditioner provided with an embodiment of the device of the present invention.

FIG. 2 is a vertical sectional side view showing a configuration of an indoor unit of an air conditioner provided with one embodiment of the device of the present invention shown in FIG.

FIG. 3 is a perspective view showing an installed state of an indoor unit of an air conditioner provided with one embodiment of the device of the present invention shown in FIG. 1;

FIG. 4 is a perspective view showing a drain pump portion of an indoor unit of an air conditioner having one embodiment of the device of the present invention shown in FIG. 1;

FIG. 5 is a partial sectional view of a drain pump provided with the embodiment of the apparatus of the present invention shown in FIG. 4;

FIG. 6 is a characteristic diagram showing an example of noise characteristics of the present invention and a conventional drain pump.

FIG. 7 is a partial sectional view of a drain pump provided with another embodiment of the device of the present invention.

FIG. 8 is a partial sectional view of a drain pump provided with still another embodiment of the device of the present invention.

FIG. 9 is a partial sectional view of a drain pump provided with another embodiment of the device of the present invention.

FIG. 10 is a partial sectional view of a drain pump provided with still another embodiment of the device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Housing, 6 ... Fan, 7 ... Motor, 8 ... Heat exchanger, 3
7 ... drain pump, 57 ... bolt, 70 ... mass, 72 ...
Granular material enclosing member, 74: magnetic shield member, 80: damping material.

Continued on the front page (72) Inventor Shunji Sasaki 390 Muramatsu, Shimizu-shi, Shizuoka Prefecture Inside Air Conditioning Systems Division, Hitachi, Ltd. 72) Inventor Fukuharu Mori 502 Kandate-cho, Tsuchiura-city, Ibaraki Pref.Hitachi, Ltd.Mechanical Research Laboratory Co., Ltd. JP-A-5-157270 (JP, A) JP-A-4-15428 (JP, A) JP-A-63-111337 (JP, A) JP-A-5-15508 (JP, A) JP-A-1-216097 ( JP, A) JP-A 4-100094 (JP, U) JP-A 61-133410 (JP, U) JP-A 62-45377 (JP, U) JP-A 2-74823 (JP, U) (58 ) Surveyed field (Int.Cl. ⁷ , DB name) F24F 1/00 361

Claims (4)

(57) [Claims] 1. An indoor unit for an air conditioner, comprising: an air blowing / absorbing unit; a heat exchange unit; a drain treatment unit having a drain pump for treating drainage from the heat exchange unit; An anti-vibration device for an air conditioner, wherein a drain pump driving motor of the drain processing means is fastened to a drain pump support member by a non-magnetic bolt via rubber. Wherein the air conditioner indoor unit according to claim 1, wherein the vibration isolating device of the air conditioner, wherein a drain pump support member and the drain pump support member of the non-magnetic. 3. The air conditioner according to claim 1 or 2,
In the vibration device, the drain pump driving motor may include:
One of the rubber air conditioner of the anti-vibration device you characterized in that it is fastened to the drain pump support member via the. 4. An air conditioner according to claim 1, wherein :
In the anti-vibration device of the Japanese machine, the non-magnetic bolt
Using either stainless steel, aluminum or brass
A vibration isolator for an air conditioner, characterized in that: