JP2713545B2 - Machine room bottom plate damping structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor mounting plate for fixing a compressor and a bottom plate of a machine room such as a refrigerator having a hot plate connected to the compressor mounting plate.

[0002]

2. Description of the Related Art Generally, in a refrigerator or the like, a compressor is mounted on a compressor mounting plate via a cushioning material such as a mounting rubber or a mount spring. However, the vibration cannot be sufficiently attenuated by the cushioning material alone. The vibration caused by the above is transmitted to the compressor mounting plate through the cushioning material, and the compressor mounting plate vibrates, causing the hot plate connected to the compressor mounting plate to resonate. Therefore, the vibration transmitted from the compressor mounting plate to the hot plate is attenuated by configuring the connecting portion between the compressor mounting plate and the hot plate at a node of a low-order natural vibration mode of the hot plate. Accordingly, measures such as preventing resonance of the hot plate have been taken.

Hereinafter, an example of a bottom plate of a machine room such as a conventional refrigerator described above will be described with reference to the drawings.

FIGS. 5 and 6 show an example of a conventional machine room bottom plate, wherein 1 is a compressor mounting plate, 2 is a hot plate,
The screw 3 is connected to the compressor mounting plate 1. Reference numeral 4 denotes a fixing pin, which is attached by inserting a hole 5 ″ formed in the leg 5 ′ of the compressor 5 and a hole 6 ′ formed in the fixing tool 6. Reference numeral 7 denotes a mounting rubber, which is mounted on the fixing pin 4. The compressor 5 is elastically supported and fixed on the compressor mounting plate 1 by being inserted into the holes 5 ″ and 6 ′. A refrigerator body 8 forms a machine room bottom plate by the compressor mounting plate 1 and the hot plate 2.

[0005]

However, in the above-described structure, the amount of vibration transmission is reduced by connecting the nodes, but the hot plate 2 connected to the compressor mounting plate 1 is not shown in FIG. As shown in (1), the compressor mounting plate 1 and the hot plate 2 are vibrated in conjunction with each other, and the center and both ends of the hot plate 2 take a low-order natural vibration mode. Therefore, the vibration of the hot plate 2 cannot be completely attenuated, and the vibration of the compressor 5 transmitted to the compressor mounting plate 1 causes the hot plate 2 to resonate.
There was a problem that vibration and noise as a refrigerator increased.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to prevent resonance of a hot plate due to vibration during operation of a compressor, thereby preventing vibration and noise of a refrigerator or the like from increasing.

[0007]

In order to achieve the above object, a machine room bottom plate according to the present invention comprises a compressor mounting plate for supporting a compressor, and a connecting portion for connecting to the compressor mounting plate on one side. The formed hot plate and a portion that extends in a direction substantially perpendicular to the one side on which the connecting portion of the hot plate is formed, and that divides both end portions and a portion that divides the both end portions into substantially quarters. And a reinforcing plate fixed to the hot plate.

[0008] Further, the reinforcing plate is provided with a flange portion substantially perpendicular to the hot plate along the extending direction of the reinforcing plate.

[0009]

According to the present invention, a hot press is provided by the above structure.
Both ends in the direction of extension of the reinforcing plate of the hot plate corresponding to the nodes and antinodes of the lower order natural vibration mode of the plate, and a portion dividing the both ends in approximately 1/4 at a time, are securely connected to the reinforcing plate. By being fixed, the rigidity of the hot plate can be increased,
Vibration is attenuated by a damping effect due to friction of a contact portion between the hot plate and the fixing portion of the reinforcing plate, thereby preventing an increase in vibration and noise of a refrigerator or the like due to resonance of the hot plate.

[0010] Further, by providing a flange portion substantially perpendicular to the hot plate along the extending direction of the reinforcing plate on the reinforcing plate, the rigidity of the reinforcing plate can be increased, and the natural vibration mode can be more firmly increased. The joints and belly of the hot plate can be suppressed, the hot plate can be made highly rigid, and the vibration is attenuated by the damping effect of the friction between the hot plate and the fixing portion of the reinforcing plate, and the refrigerator is used due to resonance. Vibration and noise can be prevented from increasing.

[0011]

【Example】

(Embodiment 1) A compressor bottom plate according to an embodiment of the present invention will be described below with reference to the drawings. In order to avoid repetition of the description, the same parts as those of the conventional example will be denoted by the same reference numerals.

In FIGS. 1 and 2, reference numeral 9 denotes a flat reinforcing plate which is fixed to the hot plate 2 by welding or the like at both ends and a portion which divides the both ends into approximately 1/4 at a time. A machine room bottom plate is formed by the machine mounting plate 1 and the hot plate 2.

The operation of the embodiment constructed as described above will be described. The vibration during the operation of the compressor 5 is
Is not sufficiently attenuated by the mounting rubber 7 which is a cushioning material supporting the compressor mounting plate 1,
Through the compressor mounting plate 1 and the hot plate 2 connected to the compressor mounting plate 1. Therefore, the hot plate 2 resonates in the low-order natural vibration mode shown in FIG. 7 to increase the vibration and noise of the refrigerator or the like. However, the low-order natural vibration mode of the hot plate 2 is caused by welding or the like. Reinforcing plate 9 of hot plate 2 corresponding to the nodes and belly
Both ends in the stretching direction and a portion that divides the both ends into approximately 1/4 at a time are securely adhered and fixed to the reinforcing plate 9,
The rigidity of the hot plate 2 is increased, and the vibration is attenuated by the damping effect due to the friction of the contact portion between the hot plate 2 and the welded joint of the reinforcing plate 9, thereby increasing the vibration and noise of the refrigerator or the like due to resonance. Can be prevented.

(Embodiment 2) Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.

In the present embodiment, the reinforcing plate 9 of the first embodiment has a flat plate shape. On the other hand, by increasing the rigidity of the reinforcing plate 9, the rigidity of the hot plate is more reliably increased. In order to achieve this, the shape of the reinforcing plate 9 'is defined.
As shown in FIG. 3, both ends in the extending direction of the reinforcing plate 9 'of the hot plate 2 corresponding to the nodes and antinodes of the low-order natural vibration mode of the hot plate 2 and the distance between both ends are substantially 1. By providing a flange portion that is substantially perpendicular to the hot plate on the reinforcing plate 9 'which is tightly fixed at a portion divided into quarters, the rigidity of the reinforcing plate 9' can be increased, and more reliably. The rigidity of the hot plate 2 is increased, and the vibration is attenuated by the damping effect due to the friction of the contact portion between the fixing portions, thereby preventing the vibration and noise of the refrigerator or the like due to resonance from increasing.

(Embodiment 3) Hereinafter, a third embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 4, a hot plate 2 'having a pipe 10 provided on the bottom thereof has a hot plate 2' at the abdomen and the node of the lower natural vibration mode of the lower order natural vibration mode.
By providing a flange portion substantially perpendicular to the plate 2 ', and fixing the reinforcing plate 9 "provided with a cutout on the side surface of the reinforcing plate 9" corresponding to the pipe 10 to the bottom surface of the hot plate 2' in close contact. , Can suppress the nodes and belly of the natural vibration mode,
The rigidity of the hot plate 2 'can be increased, and the vibration is attenuated by the damping effect due to the friction of the contact portion between the hot plate 2' and the fixing portion of the reinforcing plate 10, thereby increasing the vibration and noise of the refrigerator or the like due to resonance. Can be prevented.

[0018]

As described above, the present invention relates to a compressor mounting plate for supporting a compressor, a hot plate having a connection portion on one side for connecting to the compressor mounting plate, and a connection of the hot plate. The lower part of the hot plate is stretched in a direction substantially perpendicular to one side on which the part is formed, and both ends and a portion dividing the both ends into approximately 1/4 are tightly fixed to the hot plate. The rigidity of the hot plate is improved by securely fixing the nodes and antinodes of the natural vibration mode, and the vibration is attenuated by the damping effect due to the friction of the contact portion between the fixed portions, and the compressor is compressed. The resonance of the hot plate caused by the vibration of the above can be surely avoided. Thus, it is possible to prevent an increase in vibration and noise of a refrigerator or the like due to resonance of the hot plate.

Further, by providing a flange portion on the reinforcing plate substantially perpendicular to the hot plate along the extending direction of the reinforcing plate, the rigidity of the reinforcing plate can be increased, and the hot plate can be more firmly formed. The nodes and belly of the natural vibration mode can be suppressed, the hot plate can be made highly rigid, and the vibration is attenuated by the damping effect due to the friction of the contact portion between the fixed parts, and the vibration of the refrigerator etc. due to resonance And an increase in noise can be prevented.

Thus, the resonance of the hot plate can be effectively prevented, and a low-noise refrigerator can be provided.

[Brief description of the drawings]

FIG. 1 is a top view of a compressor mounting plate and a hot plate according to a first embodiment of the present invention.

FIG. 2 is a top perspective view of a hot plate according to the first embodiment of the present invention.

FIG. 3 is a top perspective view of a hot plate according to a second embodiment of the present invention.

FIG. 4 is a bottom perspective view of a hot plate according to a third embodiment of the present invention.

FIG. 5 is a top view of a compressor mounting plate and a hot plate showing a conventional example.

FIG. 6 shows a compressor mounting plate and a hot press showing the conventional example.
Rear view

FIG. 7 is a schematic side view of a vibration mode of a hot plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor mounting plate 2, 2 'hot plate 5 Compressor 9, 9', 9 "Reinforcement plate 10 Piping

Continuation of the front page (72) Inventor Yoshitaka Tada 3-22, Takaidahondori, Higashiosaka-shi, Osaka Matsushita Refrigerator Co., Ltd. (56) References JP-A-61-46880 (JP, A) JP-A-3-110365 (JP, A) Japanese Utility Model Showa 61-104180 (JP, U) Japanese Utility Model Showa 58-54068 (JP, U)

Claims (2)

(57) [Claims] A hot plate having a compressor mounting plate for supporting the compressor, a connecting portion on one side for connecting to the compressor mounting plate, and the hot plate having the connecting portion formed thereon. A vibration damping structure for a machine room bottom plate that extends in a direction substantially perpendicular to one side, and has a reinforcing plate in which both ends and a portion that divides the both ends into approximately quarters are fixed to the hot plate. . 2. The vibration damping structure for a machine room bottom plate according to claim 1, wherein a flange portion substantially perpendicular to the hot plate is provided on the reinforcing plate along a direction in which the reinforcing plate extends.