JPH0742938B2 - Accumulator support for compressors - Google Patents

Description

The present invention relates to an accumulator support device for a compressor used in an outdoor unit of an air conditioner.

<Prior Art> Conventionally, as an accumulator mounting structure for this type of compressor, as shown in FIGS. 10 and 11, the substantially central portion of the accumulator 51 is attached to the compressor 61 by a metal fitting 62, while the lower portion of the accumulator 51 is attached. The suction pipe
There is one in which the compressor 63 is connected to the lower part of the compressor 61 and the upper part of the accumulator 51 is connected to the refrigerant supply pipe 52 (see Japanese Patent Laid-Open No. 60-65289).

<Problems to be Solved by the Invention> However, the conventional accumulator mounting structure has the following problems because the accumulator 51 is mounted to the compressor 61 at only one central position. The present inventor uses a computer to model the above-mentioned conventional mounting structure by a Wier model, and analyzes the vibration pattern and the acoustic radiation pattern.
Shown in Figures 2, 13, 14, and 15. As is apparent from this, when the compressor 61 is operated, the accumulator 51 is transmitted with the vibration generated by the compressor 61 caused by the operation and vibrates greatly (indicated by dots in the figure). There is a problem that the lower part is large in the circumferential direction of the compressor 61 (indicated by an arrow C in FIG. 14) and vibrates like a bell with the upper part as a fulcrum. Further, as a result, there is a problem that a high level noise (shown by a solid line B in the figure) is generated from the accumulator 51 centering on the vibration direction. As can be seen from FIG. 12, the noise of this frequency is generated from the accumulator 51 and not from the compressor 61. Therefore, if the vibration of the accumulator 51 is suppressed, this noise can be suppressed.

Therefore, an object of the present invention is to provide a support device for an accumulator which is less likely to vibrate even when the compressor is operated, and therefore quiet in sound.

<Means for Solving the Problems> In order to achieve the above object, the supporting device of the accumulator of the present invention is arranged vertically along with the compressor,
An accumulator supporting device for supporting an accumulator having a specific height portion of a side wall fixed to the side wall of the compressor via a mounting member, wherein one end of the mounting member is a side wall of the accumulator. While sandwiching a portion above or below the height where is attached, a pair of sandwiching members whose other end contacts the side wall of the compressor, and a tightening member that clamps the pair of sandwiching members toward each other. It is characterized by having.

<Operation> As a premise of the present invention, the compressor and the accumulator are arranged side by side in the vertical direction, and a part of the side wall of the accumulator having a specific height is fixed to the side wall of the compressor via a mounting member.

One end of the pair of sandwiching members of the supporting device of the present invention sandwiches a portion of the accumulator side wall above or below the height at which the mounting member is attached, and the other end of the sandwiching member is on the side wall of the compressor. Abutted. Further, the pair of sandwiching members are tightened by the tightening members so as to approach each other. By this tightening by the tightening member, one end of the sandwiching member tightens the side wall of the accumulator toward the center, so that one end of the sandwiching member and the portion of the side wall of the accumulator that is tightened by the one end are integrally fixed to each other. It Further, since each of the other ends of the sandwiching members presses the side wall of the compressor toward the center, as a reaction thereof, a force is radially received from the side wall of the compressor. The forces received by the other ends of the sandwiching members are balanced with respect to the direction around the side wall of the compressor, while producing a combined force that is outward and perpendicular to the side wall of the compressor. This combined force balances the restoring force generated by the elastic deformation of the mounting member, which tends to rotate the accumulator around the mounting member in the vertical plane. As a result, the portion of the side wall of the accumulator sandwiched by the sandwiching member is supported by the side wall of the compressor via the sandwiching member with force balance. As a result, the accumulator is fixed to the compressor at two places, the mounting member and the supporting device. Therefore, even when the compressor is operated, the lower part of the accumulator does not vibrate largely like a bell than the vibration of the compressor, and a high level noise is not generated.

Further, the support device is attached by being sandwiched between the side walls of the accumulator by adjusting the tightening member even if the diameter of the accumulator changes. However, the mounting position can be adjusted freely.

<Example> Hereinafter, the present invention will be described in detail with reference to illustrated examples.

FIG. 1 shows an accumulator mounting structure which is the basis of the present invention. As shown in FIG. 1, the compressor 1 is of a closed type and has a substantially cylindrical shape, and is vertically fixed to a bottom frame of an outdoor unit (not shown) by a mounting portion 2 at a lower end of a side surface. The compressor 1 has a refrigerant suction port in the lower part of the side surface and a refrigerant discharge port in the upper part. Then, the refrigerant suction pipe 3 bent into an L shape at the refrigerant suction port
Is attached. Further, in the compressor 1, the upper and lower parts of the cylindrical accumulator 4 are arranged in the compressor 1
It is attached by attaching members 5 and 6 so as to be parallel to. The mounting members 5 and 6 are formed by bending a rectangular plate into a substantially U shape, and the supporting portions 5a and 6a corresponding to the bottom of the U shape are formed along the side wall of the accumulator 4. . The accumulator 4 is attached to the compressor 1 by attaching the supporting portions 5a and 6a to the upper and lower portions of the side wall of the accumulator 4 by welding and attaching the supporting portions 5a and 6a to the compressor 1 while protruding from both sides of the supporting portions 5a and 6a. ,
It is performed by abutting the end faces of 5b and 6b, 6b on the side wall of the compressor 1 and welding them. Accumulator 4 above
Has a lower refrigerant outlet connected to the refrigerant suction pipe 3 and an upper refrigerant inlet connected to a four-way switching valve 8 via a refrigerant supply pipe 7.

When the compressor 1 is operated in the accumulator mounting structure having the above structure, the vibration generated by the compressor 1 is transmitted to the accumulator 4 via the mounting members 5 and 6. However, since the accumulator 4 has its upper and lower side walls firmly attached to the compressor 1 by the attaching members 5 and 6, the lower portion is particularly attached to the attaching member 6.
Since it is fixed by, the lower part of the accumulator does not vibrate greatly like a bell.

With this mounting structure, as can be seen from the experimental data in FIG. 2, the sound pressure level of the noise generated during the operation of the compressor is remarkably large over a wide frequency range as compared with the noise level of the mounting structure of the conventional accumulator. The sound pressure level of the peak noise, which is a particular problem, is decreasing. Further, as can be seen from FIG. 3, this mounting structure eliminates the noise peak due to resonance near 1000 Hz, which has been a problem in the past.

In the above mounting structure, the upper and lower portions of the side wall of the accumulator 4 are mounted on the compressor 1 by the two mounting members 5 and 6, but as shown in FIG. 4, the shaft of the accumulator of the mounting member is mounted. You may make it attach the upper part and the lower part of the side wall of the accumulator 4 with the one attachment member 9 of the shape which lengthened the direction.

FIGS. 5 and 6 each illustrate an attachment structure in which an accumulator is attached to a compressor by using the supporting device according to an embodiment of the present invention. FIG. 5 is a side view, and FIG. 6 is a transverse sectional view taken along line VI-VI in FIG.

As shown in FIGS. 5 and 6, the upper side wall of the accumulator 4 is fixed to the upper side wall of the compressor 1 by a mounting member 20 so that the axis of the accumulator 4 is parallel to that of the compressor 1. In the upper accumulator 4, the lower refrigerant outlet 4a is connected to the compressor 1 by the L-shaped refrigerant suction pipe 3, and the upper refrigerant inlet 4b is connected to the refrigerant supply pipe 7.
Connected to.

A support device A having a pair of sandwiching members 11 and 12 is attached to the lower portion of the side wall of the accumulator 4. The sandwiching members 11 and 12 of the supporting device A are of the same shape obtained by bending an elongated rectangular plate into a substantially hook shape, and have L portions having parallel portions 11a-1 and 12a-1 which are sufficiently longer than the radius of the accumulator 4.
It is composed of character-shaped sandwiching portions 11a and 12a, bolt supporting portions 11b and 12b, and curved contact portions 11c and 12c along the curved surface of the side wall of the compressor 1. Then, the sandwiching members 11 and 12 are arranged in a symmetric positional relationship with each other so that the parallel portions 11a of the sandwiching portions 11a and 12a.
-1, 12a-1 and the orthogonal portions 11a-2, 12a-2 connected to them are respectively brought into contact with the lower portions of the side walls of the accumulator 4,
The contact portions 11c and 12c of the two sandwiching members 11 and 12 are brought into contact with the outer wall of the compressor 1. Then, the bolt 13 is inserted into the holes 11b-1 and 12b-1 provided in the bolt support portions 11b and 12b, and the bolt 13 and the nut 14 are used to connect the two bolt support portions 11b and 11b.
Tighten 12b. Then, the sandwiching members 11, 12 are
They try to get closer to each other and widen the gap between the bottom of the accumulator side wall and the compressor outer wall as if wedged in. However, since the accumulator 4 is firmly fixed to the compressor 1 via the mounting member 20 so that the axes of the both members are parallel to each other, the sandwiching members 11 and 12, the compressor 1 and the accumulator 4 are mutually connected. The lower part of the accumulator 4 is fixed to the lower part of the compressor 1 by the supporting device A in such a manner that the forces of action and reaction are exerted on each other.

As shown in FIG. 7, even if the diameter of the accumulator attached to the compressor becomes small, the nut 14 is tightened to narrow the gap between the pair of sandwiching members 11 and 12, so that the accumulator 4 can be supported in the same manner as described above. The same is true even if the diameter of the accumulator increases.

As described above, in this accumulator mounting structure, the upper portion of the side wall of the accumulator 4 is fixed to the compressor 1 by the mounting member 20, while the lower portion of the side wall is held by the supporting device A so as to be supported. Even when driven to generate vibration, the lower portion of the accumulator 4 does not vibrate greatly in a bell shape in the circumferential direction of the compressor 1. Therefore, as shown in FIG. 8, the noise level peak at the frequency corresponding to the harmonic component of the operating frequency, which is often a problem due to the operating frequency of the compressor, becomes the peak of the noise level emitted by the conventional mounting structure. Can be held low compared to.

In addition, the supporting device A includes a sandwiching member 1 having a pair of parallel portions.
Since 1, 12 and bolts 13 and nuts 14 as tightening members are provided, they can be attached to the side wall of the accumulator so as to be removable and attachable regardless of the diameter of the accumulator. . Further, this accumulator support device can be directly applied to support the lower part of the side wall of the accumulator of the existing accumulator mounting structure.

In the above embodiment, the upper and lower parts of the side wall of the accumulator are attached to the compressor. In addition to this, as shown in FIGS. 9 (a) and 9 (b), the bottom 31 or the cylinder of the closed case of the accumulator is added. If the thickness of the portion 32 is increased, the vibration of the accumulator during the operation of the compressor can be further suppressed.

<Effects of the Invention> As is apparent from the above, the accumulator support device of the present invention is arranged vertically along with the compressor,
An accumulator supporting device for supporting an accumulator having a specific height portion of a side wall fixed to the side wall of the compressor via a mounting member, wherein one end of the mounting member is a side wall of the accumulator. While sandwiching a portion above or below the height where is attached, a pair of sandwiching members whose other end contacts the side wall of the compressor, and a tightening member that clamps the pair of sandwiching members toward each other. Therefore, even if the compressor is operated, it is possible to prevent the lower part of the accumulator from vibrating more than the vibration of the compressor from vibrating significantly, and it is possible to prevent generation of high level noise.

In addition, this support device can be attached while being sandwiched between the side walls of the accumulator by adjusting the tightening member even if the diameter of the accumulator changes. Moreover, the mounting position can be freely adjusted.

[Brief description of drawings]

FIG. 1 is a perspective view showing a mounting structure of an accumulator to a compressor which is a basis of the present invention, and FIG. 2 is a noise sound generated when the compressor is operated at the same frequency in the above mounting structure and the conventional mounting structure. Fig. 3 shows the frequency analysis of pressure, and Fig. 3 shows the result of frequency analysis of the sound pressure of the noise generated by the compressor with the accumulator attached by the attachment structure shown in Fig. 1 and the compressor with the accumulator attached by the conventional attachment structure. FIG. 4 is a diagram showing a modified example of the mounting member of FIG. 1, and FIG. 5 is a side view showing a mounting structure in which an accumulator is mounted on a compressor by using the supporting device of one embodiment of the present invention. ,
6 is a cross-sectional view taken along the line VI-VI of FIG. 5, FIG. 7 is an explanatory view when the accumulator of FIG. 5 is replaced with a small diameter one, and FIG. 8 is the mounting structure of FIG. The figure showing the result of frequency analysis of the sound pressure of the noise generated when the conventional mounting structure is used for each, FIG. 9 (a), (b) is a longitudinal sectional view showing a modified example of the accumulator, The figure is a side view of the conventional accumulator mounting structure, and Fig. 11 is BB of Fig. 10.
FIG. 12 is a perspective view of vibration patterns and acoustic radiation patterns obtained by modeling the accumulator mounting structure for a conventional compressor with a wire model and analyzing it with a computer. FIG. 13 is from the direction of arrow A in FIG. The front view seen and FIGS. 14 and 15 are a plan view and a side view of FIG. 13, respectively. 1 ... Compressor, 3 ... Refrigerant suction pipe, 4 ... Accumulator, 5,6,9 ... Mounting member, 7 ... Refrigerant supply pipe, 8
...... Four-way switching valve, 11,12 ...... Clamping member, 13 ...... Bolt, 1
4 …… Nut.

Claims (1)

[Claims] 1. An accumulator which is arranged vertically alongside a compressor (1), and a portion of a side wall having a specific height is fixed to the side wall of the compressor (1) through a mounting member (20). 4) An accumulator supporting device (A) for supporting 4), wherein one end of the side wall of the accumulator (4) is located above or below a height at which the mounting member (20) is mounted. And a tightening member (13) that clamps the pair of sandwiching members (11, 12) whose other end is in contact with the side wall of the compressor (1) and the pair of sandwiching members (11, 12) toward each other. , 14), and an accumulator support device.