JPH08247621A - Vibration damping structure of machine chamber bottom plate - Google Patents

Abstract

PURPOSE: To prevent a hot plate from resonating owing to vibration of a compressor during operation by providing a stepped part over the entire width of one side which crosses a heat dissipation pipe and forms a connection part of the hot plate substantially perpendicularly to the side. CONSTITUTION: A compressor 5 is mounted and supported on a compressor mounting plate 1 by inserting an anchorage pin 4 through a hole formed in a leg 5a of the compressor and a hole 6a formed in a fixing tool 6. A hot plate 2 is connected with the compressor mounting plate 1 with screws 3, and a stepped part 10 is provided over the entire width of one side which crosses a heat dissipation pipe 3 and forms a connection part of the hot plate 2 substantially perpendicularly to the one side. Hereby, nodes and loops of lower order natural vibrations of the hot plate 2 are securely fixed, so that high rigidity of the hot plate 2 is ensured and the hot plate 2 is securely prevented from resonating owing to vibration of the compressor 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a bottom plate of a machine room such as a refrigerator having a compressor mounting plate for fixing a compressor and 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 mount rubber and a mount spring. The vibration generated by is transmitted to the compressor mounting plate through the cushioning material, the compressor mounting plate vibrates, and the hot plate connected to the compressor mounting plate resonates.

Therefore, by arranging the connecting portion between the compressor mounting plate and the hot plate at the node of the low-order natural vibration mode of the hot plate, the vibration transmitted from the compressor mounting plate to the hot plate is attenuated. Therefore, measures such as preventing resonance of the hot plate have been taken.

An example of the conventional machine room bottom plate of the refrigerator or the like will be described below with reference to the drawings.

FIGS. 3, 4 and 5 show an example of a conventional machine chamber bottom plate, wherein 1 is a compressor mounting plate and 2 is a hot plate, which is connected to the compressor mounting plate 1 by screws 3. .
Reference numeral 4 is a fixing pin, which is a hole 5b formed in the leg 5a of the compressor 5.
Also, the holes 6a formed in the fixture 6 are inserted and attached.

Reference numeral 7 denotes a mount rubber, which is inserted into the fixing pin 4 and inserted into the holes 5b and 6a to elastically support and fix the compressor 5 on the compressor mounting plate 1.

Reference numeral 8 denotes a heat radiating pipe for radiating the heat of the refrigerant discharged from the compressor 5, which is the hot plate 2
It is in close contact with. Reference numeral 9 denotes a refrigerator body, which forms a machine room bottom plate by the compressor mounting plate 1 and the hot plate 2.

[0008]

However, in the above-mentioned structure, although the vibration transmission amount is reduced by connecting the nodes, the hot plate 2 connected to the compressor mounting plate 1 is shown in FIG. As shown, the compressor mounting plate 1 and the hot plate 2 are coupled and vibrate, and a low-order natural vibration mode in which the center and both ends of the hot plate 2 serve as nodes is taken.

Therefore, the vibration of the hot plate 2 cannot be completely dampened, and the vibration of the compressor 5 transmitted to the compressor mounting plate 1 causes the hot plate 2 to resonate, so that it functions as a refrigerator. There is a problem that vibration and noise increase.

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.

[0011]

In order to achieve the above object, a machine chamber bottom plate of the present invention comprises a compressor mounting plate for supporting a compressor and a connecting portion on one side for connecting to the compressor mounting plate. A stepped portion is provided over the entire width in the direction substantially perpendicular to the formed hot plate and the one side that intersects the heat dissipation pipe and forms the connection portion of the hot plate.

[0012]

According to the present invention, by the above-described structure, the hot plate is stepped on both ends of the hot plate corresponding to the nodes and antinodes of the natural vibration modes of the hot plate, and the part dividing the both ends into about 1/4. By providing the portion, the rigidity of the hot plate can be increased, and the vibration and noise of the refrigerator or the like due to the resonance of the hot plate can be prevented from increasing.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 duplication of explanation, the same parts as those of the conventional example will be described with the same reference numerals.

In FIGS. 1 and 2, reference numeral 10 denotes a heat radiating pipe 8.
Is a stepped portion that intersects with the hot plate 2 and is provided over the entire width of the hot plate 2. The compressor mounting plate 1 and the hot plate 2 form a machine chamber bottom plate.

The operation of the embodiment configured as described above will be described. Vibration during operation of the compressor 5 is
The mount rubber 7 which is a cushioning material supporting the compressor mounting plate 1 cannot be sufficiently attenuated.
Through the compressor mounting plate 1, and further to the hot plate 2 connected to the compressor mounting plate 1. Therefore, the hot plate 2 resonated in the low-order natural vibration mode shown in FIG. 5 to increase the vibration and noise of the refrigerator and the like, but the hot plate corresponding to the node and antinode of the low-order natural vibration mode. By adding the stepped portion 10 to the plate 2, the rigidity of the hot plate 2 is increased, and it is possible to prevent an increase in vibration and noise of a refrigerator or the like due to resonance.

[0016]

As described above, according to the present invention, a compressor mounting plate for supporting a compressor, a hot plate having a connecting portion on one side for connecting to the compressor mounting plate, and a pipe for radiating heat are provided. By intersecting and extending to the full width in a direction substantially perpendicular to one side where the connection part of the hot plate is formed, and providing stepped parts at both end parts and a part dividing the both end parts into about 1/4 By securely fixing the nodes and antinodes of the low-order natural vibration mode of the hot plate, the rigidity of the hot plate can be increased, and the resonance of the hot plate due to the vibration of the compressor can be reliably avoided. . As a result, it is possible to prevent an increase in vibration and noise of the refrigerator due to the resonance of the hot plate.

[Brief description of drawings]

FIG. 1 is a top view of a compressor mounting plate and a hot plate showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA shown in FIG.

FIG. 3 is a top view of a compressor mounting plate and a hot plate showing a conventional example.

FIG. 4 is a rear view of a compressor mounting plate and a hot plate showing the conventional example.

FIG. 5 is a schematic side view of a vibration mode of a hot plate.

[Explanation of symbols]

 1 compressor mounting plate 2 hot plate 5 compressor 8 radiating pipe 10 stepped section

Claims (1)

[Claims] 1. A compressor mounting plate for supporting a compressor, a hot plate having a connecting portion and a stepped portion on one side for connecting to the compressor mounting plate, and heat radiation closely attached to the hot plate. The vibration damping structure for the bottom plate of the machine room, characterized in that it has a stepped portion that intersects with the heat radiation pipe in the entire width of the hot plate.