JP2000111202A - Air conditioner - Google Patents

Abstract

(57) [Summary] In an air conditioner equipped with a plurality of compressors, noise from the pipes and damage to the pipes due to propagation of vibration from the compressors to the pipes connected to the compressor are reduced. To prevent. SOLUTION: Compressors 13 and 14 are arranged at compressor bottom portions 13a and 1a.
4a, a fixing plate 16 and a compressor fixing bolt 17 for rigidly connecting the plurality of compressors 13 and 14 are provided. The fixing plate 16 is attached to the air conditioner housing 18 via the compressor support portion 19. Support elastically.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for reducing pipe noise and preventing damage to a pipe caused by propagation of compressor vibration to the pipe.

[0002]

2. Description of the Related Art FIG. 1 shows a conventional air conditioner. The air conditioner 1 exemplifies a refrigeration cycle 2 for air conditioning such as cooling and heating. This refrigeration cycle has, for example, two compressors 3 and 4 via a refrigerant pipe 5.

The operation of the air conditioner 1 is elastically supported between compressor bottoms 3a and 4a and the air conditioner housing 6 by compressor support legs 7 formed of an elastic member such as a vibration-proof rubber. Occasionally, the operation vibrations of the compressors 3 and 4 are prevented from being directly transmitted to the air conditioner housing 6.

When operating vibrations occur in the compressors 3 and 4 during the operation of the compressors 3 and 4, the operating vibrations are transmitted to the pipes 5 to generate pipe noises. In addition, the vibration of the compressors 3 and 4 propagates to the pipe 5, so that the stress is repeatedly and intermittently applied to the constituent members of the pipe 5, which may cause cracks due to stress fatigue and further damage to the pipe. Such a problem that noise and cracks are generated in the pipe 5 due to the propagation of the operation vibration of the compressors 3 and 4 is particularly remarkable in the vicinity of the connection between the pipe 5 and the compressor 3.

Conventionally, as a countermeasure for preventing adverse effects on the pipe 5 due to such vibrations of the compressors 3 and 4, attachment of a vibration isolating member to the pipe 5 is performed.

[0006] The vibration generated during the operation of the compressor 3 is caused by the weight balance of the rotating body accommodated in the compressor 3 and by the torque fluctuation generated in the process of sucking, compressing and discharging the refrigerant. There are things to do.

[0007] The torque fluctuation causes vibration in the rotation direction around the rotation axis of the compressor 3, and this rotation vibration is almost proportional to the displacement volume of the compressor 3, and the weight of the compressor 3, ie, the inertia force,
And is inversely proportional to the square of the rotation speed of the rotating body.

[0008]

(Equation 1)

[0009]

However, in the case of a model operating at a commercial power frequency, for example, the compressor 3,
It is not practical to reduce the rotational vibration by reducing the displacement volume of 4 or increasing the number of rotations of the rotating body.

Further, since the vibration caused by the rotation of the rotating body accommodated in the compressors 3 and 4 increases substantially in proportion to the displacement volume of the compressors 3 and 4, the rotations of the compressors 3 and 4 having a large capacity are increased. Vibration is large, and the vibration propagates to the pipe 5 connected to the compressors 3 and 4, for example, so that noise is remarkable or the pipe 5 is cracked. Then, adding a vibration isolating member to the pipe 5 in order to prevent this vibration leads to an increase in the cost of the air conditioner 1.

The present invention has been made in consideration of the above circumstances, and prevents noise from a pipe and damage to the pipe caused by vibrations from the compressor propagating to pipes connected to the compressor. It is an object to provide an improved air conditioner.

Another object of the present invention is to reduce the vibration of the compressor, thereby preventing the noise from the pipe and the damage to the pipe caused by the propagation of the vibration to the pipe connected to the compressor. Is to provide.

Still another object of the present invention is to provide an air conditioner having a plurality of compressors, for example, by effectively reducing the vibration of each compressor by relatively simple means. It is an object of the present invention to provide an air conditioner in which noise from piping and damage to the piping caused by propagation of vibration to piping connected to the air conditioner are prevented.

Still another object of the present invention is to provide an air conditioner having, for example, an air conditioner having a plurality of compressors, in which an adverse effect on piping due to vibration of the compressor is prevented at a low cost. It is in.

[0015]

Means for Solving the Problems To solve the above-mentioned problems, the invention of claim 1 provides an air conditioner having a plurality of compressors, wherein the plurality of compressors are fixed to each other with required rigidity. An air conditioner characterized by being rigidly interconnected by means.

[0016] In order to solve the above-mentioned problem, a second aspect is provided.
In the invention, the fixing means includes, at the bottom of the plurality of compressors, a fixing plate for rigidly mounting the plurality of compressors, and the fixing plate is attached to an air conditioner housing via a compressor support leg. The air conditioner according to claim 1, wherein the air conditioner is elastically supported.

[0017] In order to solve the above-mentioned problem, a third aspect is provided.
In the invention, the fixing means includes a fixing member for rigidly connecting the body portions of the plurality of compressors, and the plurality of compressor bottoms are elastically attached to the air conditioner housing via elastic supporting legs. An air conditioner according to claim 1, wherein the air conditioner is supported.

[0018] In order to solve the above-mentioned problem, a fourth aspect of the present invention is provided.
The present invention provides the air conditioner according to any one of claims 1 to 3, wherein the plurality of compressors are arranged at required intervals.

According to another aspect of the present invention, there is provided a semiconductor device comprising:
The invention according to any one of claims 1 to 4, wherein the plurality of compressors are configured to rotate the rotating bodies housed in the opposing compressors in directions opposite to each other. To provide air conditioners.

[0020] In order to solve the above-mentioned problems, a sixth aspect of the present invention is provided.
The invention is characterized in that at least one compressor, a load to be applied to the compressor, and the compressor and the load are rigidly connected to each other by fixing means having required rigidity. Provide a harmonic machine.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air conditioner according to the present invention will be described below with reference to the drawings. First Embodiment (FIG. 2) FIG. 2 is a schematic configuration diagram illustrating an air conditioner according to a first embodiment.

The air conditioner 11 according to the present embodiment exemplifies a refrigeration cycle 12 for cooling and heating.
2 has a configuration in which, for example, two compressors 13 and 14 are incorporated via a pipe 15.

The two compressors 13 and 14 are fastened at their respective compressor bottoms 13a and 14a onto a fixing plate 16 having high rigidity by fastening means such as bolts 17 for fixing the compressor, and are rigidly installed. Have been.

The fixing plate 16 is elastically supported on the housing 18 of the air conditioner by a plurality of compressor supporting legs 19 formed of an elastic member such as a vibration-proof rubber. The compressor support leg 19 is interposed between the fixed plate 16 and the air conditioner housing 18, and when the air conditioner 11 is operated, vibration from the compressors 13 and 14 is directly transmitted to the air conditioner housing 18. To prevent

In the air conditioner 11, the compressors 13, 1
4 compresses the refrigerant gas, and compresses the compressed refrigerant gas into the compressor 1
Refrigeration cycle 1 discharged from pipes 3 and 14 through pipe 15
The refrigeration cycle 12 performs air conditioning such as indoor cooling and heating.

According to the present embodiment, two compressors 13,
14 are rigidly connected to each other and mounted on the fixed plate 16. For example, when one compressor 13 is driven, the total weight is increased, so the inertia force is increased, The rotational vibration of the compressor 13 is reduced.

Further, when the two compressors 13 and 14 are rigidly connected, the moment of inertia of the entire compressors 13 and 14 is dramatically increased to four times or more, and the amount of inertia can be increased. . Further, the moment of inertia increases in proportion to the square of the distance between the positions of the centers of gravity of the compressors 13 and 14. Therefore, even if the two compressors 13 and 14 are operated at the same time, the total amount of inertia and the moment of inertia can be increased, and the rotational vibrations of the compressors 13 and 14 can be reduced accordingly. Rotational vibration is less than half that of the case where rigid coupling is not performed.

[0028]

(Equation 2)

Further, since the compressor supporting legs 19 made of an elastic member such as a vibration isolating rubber are elastically supported between the compressor bottom portions 13a and 14a and the air conditioner housing 18, the air conditioner is improved. At the time of operation of 11, the vibration from the compressors 13 and 14 can be prevented from being directly transmitted to the air conditioner housing 18.

Therefore, according to this embodiment, the vibrations of the compressors 13 and 14 are reduced, the propagation of the vibrations to the pipe 15 connected to the compressors 13 and 14 is reduced, and the noise from the pipe 15 Damage to the pipe 15 can be effectively prevented.

Second Embodiment (FIG. 3) FIG. 3 is a schematic configuration diagram showing an air conditioner according to a second embodiment.

In the air conditioner 11A of the present embodiment, the two compressors 13 and 14 are rigidly connected to each other by a fixing member 20 having high rigidity at the body of the sealed case. In addition, each compressor bottom 13
a and 14a are elastically supported via an air conditioner housing 18 and elastic support legs 19, respectively. The rest is the same as in the first embodiment, and a description thereof will be omitted.

According to the present embodiment, in addition to the same effects as in the first embodiment, the compressors 13 and 14 are rigidly connected to each other by the fixing member 20 at the body and integrated, while the compressor bottom 13a is formed. , 14a are elastically supported by the elastic support legs 19 in the same manner as in the prior art.

Third Embodiment (FIG. 4) FIG. 4 is a schematic configuration diagram showing an air conditioner according to a third embodiment.

In the air conditioner 11B of the present embodiment, the refrigeration cycle 12 is substantially at the center position.
Compressors 13, 14 are provided at equal intervals on both left and right sides of 2,
The distance between the centers of gravity of the compressors 13 and 14 is increased. The rest is the same as in the first embodiment, and a description thereof will be omitted.

According to the present embodiment, in addition to the same effects as those of the first embodiment, the distance between the centers of gravity of the compressors 13 and 14 is increased, so that the total moment of inertia of the compressors 13 and 14 is increased. The effect is obtained that the rotational vibration of the compressors 13 and 14 can be further reduced.

Fourth Embodiment (FIG. 5) FIG. 5 is a schematic configuration diagram showing an air conditioner according to a fourth embodiment.

In the air conditioner 11C of the present embodiment, the compressor 13 and the heavy object 23 are rigidly connected by the fixing plate 16 and the compressor supporting bolts 17 to increase the weight of the compressor 13. Other configurations are the same as those in the first embodiment, and a description thereof will be omitted.

According to the present embodiment, since the weight of the compressor 13 is increased to increase the inertial force of the compressor 13, the vibration of the compressor 13 can be reduced, and the piping connected to the compressor 13 can be reduced. 15 can be reduced, noise due to pipe vibration can be reduced, and damage to the pipe 15 can be prevented.

Fifth Embodiment (FIG. 6) FIG. 6 is an enlarged plan view showing a main part of an air conditioner according to a fifth embodiment.

In the air conditioner 11D according to the present embodiment,
The rotation directions of the rotating bodies housed in the opposing compressors 13 and 14 are reversed to each other. The rest is the same as in the first embodiment, and a description thereof will be omitted.

According to the present embodiment, in addition to the same effects as those of the first embodiment, mutual rotation vibrations are canceled by reversing the rotation directions of the rotating bodies inside the compressors 13 and 14. The vibration of the compressors 13 and 14 can be further reduced.

In the above embodiment, the compressor is 2
Although an example in which two compressors were installed was shown, the number of compressors is not limited to two.
There may be three or more.

[0044]

As described above in detail, in the air conditioner according to the present invention, the compressor is rigidly connected to increase the inertia force or the moment of inertia and reduce the rotational vibration of the compressor. Thus, the propagation of vibration to the pipe connected to the compressor can be reduced, and the noise due to the vibration of the pipe and the damage due to the vibration of the pipe can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a conventional air conditioner.

FIG. 2 is a schematic configuration diagram showing a first embodiment of an air conditioner according to the present invention.

FIG. 3 is a schematic configuration diagram showing a second embodiment of the air conditioner according to the present invention.

FIG. 4 is a schematic configuration diagram showing a third embodiment of the air conditioner according to the present invention.

FIG. 5 is a schematic configuration diagram showing a fourth embodiment of the air conditioner according to the present invention.

FIG. 6 is an enlarged schematic plan view showing a main part of a fifth embodiment of the air conditioner according to the present invention.

[Explanation of symbols]

 11, 11A, 11B, 11C, 11D Air conditioner 12 Refrigeration cycle 13 Compressor 13a Compressor bottom 14 Compressor 14a Compressor bottom 15 Pipe 16 Fixing plate 17 Compressor fixing bolt 18 Air conditioner housing 19 Compressor support Part 20 Fixing member 23 Weighted object

Claims (6)

[Claims] 1. An air conditioner having a plurality of compressors, wherein the plurality of compressors are rigidly interconnected by fixing means having a required rigidity. 2. The fixing means comprises a fixing plate for rigidly mounting the plurality of compressors at a bottom portion of the plurality of compressors, and the fixing plate is provided with an air conditioner casing via a compressor supporting leg. 2. The air conditioner according to claim 1, wherein the air conditioner is elastically supported. 3. The fixing means includes a fixing member for rigidly connecting the body portions of the plurality of compressors, and the plurality of compressor bottoms are connected to an air conditioner housing via elastic support legs. 2. The air conditioner according to claim 1, wherein the air conditioner is elastically supported. 4. The air conditioner according to claim 1, wherein the plurality of compressors are arranged at a predetermined interval. 5. The apparatus according to claim 1, wherein the plurality of compressors are configured to rotate the rotating bodies housed in the opposing compressors in directions opposite to each other. The air conditioner as described. 6. A compressor according to claim 1, wherein said at least one compressor, a weight to be applied to said compressor, and said compressor and said weight are rigidly connected by fixing means having required rigidity. Air conditioner.