JPH10332176A - Outdoor apparatus of air conditioner - Google Patents

Abstract

(57) [Problem] To provide an outdoor unit of an air conditioner capable of improving quietness by using small and lightweight parts. SOLUTION: On one side of a four-way switching valve 7, a second gas pipe joint 23, a suction pipe joint 24, and a first gas pipe joint 25 are juxtaposed. These joints 23, 24, 25 are
5 and clamp the mounting bracket 16 from above and below. The dynamic vibration absorber 11 is mounted on the mounting bracket 16.
The dynamic vibration absorber 11 includes a weight 12 having a mass of about 200 g and four rubber columns 13 supporting the weight 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit of an air conditioner having a compressor.

[0002]

2. Description of the Related Art In an outdoor unit of an air conditioner, the vibration of a compressor generated during operation is transmitted to a casing through piping, and the vibration of the casing is a main factor to generate noise. One of the techniques for reducing such noise and improving air conditioning comfort is torque control of a drive motor that drives a compressor. This is to control the output torque of the drive motor so that the output torque matches the instantaneous gas compression load torque. However, in particular, in the case of a one-cylinder compressor, the entire compressor may vibrate in a mode in which it swings rigidly.
This is remarkable when the compressor is inverter-controlled and the operating frequency is relatively low at 20 to 30 Hz. However, such vibration of the compressor can be sufficiently suppressed only by the torque control. Therefore, it is also difficult to reduce noise. Therefore, for example, Japanese Patent Application Laid-Open No.
Japanese Patent Publication No. 31 proposes attaching a vibration damping device to a compressor.

FIG. 6 is a side view showing the vibration damping device. In a conventional air conditioner outdoor unit equipped with this vibration damping device, four coil springs 32
The gantry 33 is mounted substantially horizontally via the. Then, the compressor 36 is placed laterally on the central portion 34 of the gantry 33 and fixed with screws 37, 37 via the legs 41. In addition, a weight 40 is attached to the lower surface of the left and right overhanging portions 35 of the gantry 33 via four rubber columns 39. The rubber column 39 and the weight 40 constitute a dynamic vibration absorber 38 having a natural frequency substantially equal to the natural frequency of the compressor 36.

In an outdoor unit of a conventional air conditioner equipped with the above-described vibration damping device, when the compressor 36 is operated and vibrates at its natural frequency, the dynamic vibration absorber 38 causes the natural vibration to be substantially equal to the natural vibration. Vibrates in the opposite direction by a number. The dynamic vibration absorber 38 absorbs the vibration energy of the compressor 36 and reduces the vibration. Also, since the gantry 33 is attached to the bottom plate 31 via four coil springs 32,
The propagation of the vibration of the compressor 36 to the bottom plate 31 is also reduced. With these, the silence of the outdoor unit has been improved.

[0005]

However, the natural frequency of the dynamic vibration absorber 38 is made substantially equal to the natural frequency of the compressor 36, and the vibration energy of the compressor 36 is increased by vibrating the dynamic vibration absorber 38. In order to absorb the pressure, the weight 40 needs a mass of about 1/10 (about 1 kg) of the compressor 36. Therefore, the dynamic vibration absorber 38
Is relatively large, so that a special space is required around the compressor 36 for mounting the dynamic vibration absorber 38. However, a soundproofing material is arranged around the compressor 1 so as to surround it. In the case of a vertical compressor in particular, it is necessary to secure a mounting space below the compressor 36 as in the above-described conventional example. Is also difficult. The larger dynamic vibration absorber 38 also contributes to an increase in equipment cost.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks, and has as its object to provide an outdoor unit of an air conditioner capable of improving the quietness without using large parts. Is to provide.

[0007]

The outdoor unit of the air conditioner according to the first aspect of the present invention includes a compressor 1, an outdoor heat exchanger 2, a discharge pipe 3, a suction pipe 4, and an outdoor heat exchanger of the compressor 1. An outdoor unit of an air conditioner having, in a casing, a first gas pipe 5 connected to an internal heat exchanger 2 and a pipe such as a second gas pipe 6 connected to an indoor heat exchanger provided in the indoor unit. , A dynamic vibration absorber 11 having an elastic body 13 and a weight 12 supported by the elastic body 13 absorbs vibrations of pipes 3, 4, 5, and 6 connected from the compressor 1 to a casing. It is characterized by having been provided so that.

[0008] The term "dynamic vibration absorber" as used herein refers to a material that is attached to a resonance part of a target structure and resonates at the same frequency and opposite phase as the resonance part, thereby absorbing the vibration energy of the resonance part. Say.

[0009] In the outdoor unit of the air conditioner of the first aspect,
Vibration transmitted from the compressor 1 to the casing and becoming a main factor of noise can be reduced in the transmission path. Further, since the mass of the vibration transmission system is much smaller than the mass of the compressor 1, the dynamic vibration absorber 11 can be reduced in size and weight.

According to a second aspect of the present invention, the dynamic vibration absorber 11 includes a discharge pipe 3 and a suction pipe 4 of the compressor 1.
And are provided in a portion where they are arranged in a concentrated manner.

[0011] In the outdoor unit of the air conditioner according to the second aspect,
Since the dynamic vibration absorber 11 is provided at a portion where the pipes 3 and 4 for transmitting the vibration from the compressor 1 are concentrated, the vibration transmitted to the casing and becoming a main factor of the noise is reduced to a single dynamic vibration absorber 1.
1 makes it possible to surely reduce the amount.

Further, the outdoor unit of the air conditioner according to claim 3 is:
The discharge pipe 3, the suction pipe 4, the first gas pipe 5, and the second
A four-way switching valve 7 to which a gas pipe 6 is connected is provided in a casing, and the dynamic vibration absorber 11 is provided near the four-way switching valve 7.

[0013] In the outdoor unit of the air conditioner according to the third aspect,
An empty space near the four-way switching valve 7 can be effectively used.

In the outdoor unit of the air conditioner according to the fourth aspect, the four-way switching valve 7 has a plurality of pipes 4, 5, 6 on one side thereof.
Are connected in parallel, and the dynamic vibration absorber 11 attaches a plane formed along the extending direction and the parallel direction of the plurality of pipes 4, 5, and 6. It is characterized by being provided as a surface.

In the outdoor unit of the air conditioner according to the fourth aspect,
Since the plane formed by the plurality of pipes 4, 5, 6 arranged in parallel is used as the mounting surface, the mounting structure of the dynamic vibration absorber 11 can be simplified.

The outdoor unit of the air conditioner according to the fifth aspect includes the plurality of pipes 4, 5, 6 connected to the four-way switching valve 7,
The mounting member 16 is fixed so as to sandwich these pipes 4, 5, and 6 in a direction substantially perpendicular to the extending direction and the juxtaposed direction, and the dynamic vibration absorber 11 is provided on the mounting member 16. It is characterized by:

In the outdoor unit of the air conditioner according to the fifth aspect,
A mounting structure suitable for implementation can be obtained.

In the outdoor unit of the air conditioner according to the sixth aspect, the mounting member 16 includes a plurality of the pipes 4 through a heat insulating material 15.
It is characterized by being attached to 5,6.

[0019] In the outdoor unit of the air conditioner according to the sixth aspect,
By providing heat insulation between each of the pipes 4, 5, 6 and the dynamic vibration absorber 11, the dynamic vibration absorber 1 can be provided without impairing good air conditioning performance.
1 can be attached.

In the outdoor unit of the air conditioner of the present invention, at least the discharge pipe 3 or the suction pipe 4 is connected to the one side of the four-way switching valve 7 to which the dynamic vibration absorber 11 is attached. It is characterized by having.

In the outdoor unit of the air conditioner according to claim 7,
A dynamic vibration absorber 11 is provided in one of the pipes 3 and 4 connected to the compressor 1 and transmitting vibration of the compressor 1. Therefore, it is possible to more reliably reduce the vibration transmitted from the compressor 1 to the casing.

An outdoor unit of an air conditioner according to claim 8 is characterized in that the compressor 1 is controlled so that the operating frequency is variable.

According to a ninth aspect of the outdoor unit of the air conditioner, the compressor 1 is of a one-cylinder type.

An outdoor unit of an air conditioner according to a tenth aspect is characterized in that the compressor 1 is a vertical compressor.

In the outdoor unit of the air conditioner according to any one of the eighth to tenth aspects, the vibration transmitted to the casing can be particularly significantly reduced by the dynamic vibration absorber 11.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, specific embodiments of the outdoor unit of the air conditioner of the present invention will be described in detail with reference to the drawings.

FIG. 4 is a partial perspective view of the outdoor unit.
In the figure, a top plate, a front plate, a side plate, an outdoor fan, and the like of the casing are omitted for the sake of simplicity and easy understanding. As shown in the drawing, in the outdoor unit, the vertical compressor 1 is mounted on the bottom plate 8 via a vibration isolating rubber 26. The compressor 1 is of a one-cylinder type whose operating frequency is controlled by an inverter, and a four-way switching valve 7 is provided above the compressor. The upper part of the compressor 1 and the four-way switching valve 7 are connected by the discharge pipe 3, while the lower part of the compressor 1 and the four-way switching valve 7 are connected by the suction pipe 4 via the accumulator 30. . The four-way switching valve 7 is connected to the outdoor heat exchanger 2 by the first gas pipe 5 and connected to the gas shut-off valve 10 by the second gas pipe 6. The gas shut-off valve 10 is connected to a communication pipe (not shown) together with the liquid shut-off valve 9.
These are connected to an indoor heat exchanger provided in the indoor unit via a valve. Each of these closing valves 9 and 10 is fixed to a closing valve mounting plate 27 erected on the bottom plate 8. Further, a dynamic vibration absorber 11 is provided in the vicinity of the four-way switching valve 7, which will be described later.

FIG. 3 shows the four-way switching valve 7, wherein FIG. 3 (a) is a side view and FIG. 3 (b) is a bottom view. As shown in these figures, the four-way switching valve 7 is formed in a cylindrical shape, and one side of the four-way switching valve 7 is connected to a second gas pipe 6, a suction pipe 4, and a first gas pipe 5, respectively. 2 gas pipe joint 23, suction pipe joint 24, first gas pipe joint 25
Are juxtaposed. Each of these joints 23, 24, 2
Reference numeral 5 denotes a part of each of the pipes 4, 5, and 6 after the connection of each of the pipes 4, 5, and 6. Therefore, the term “piping” according to claim 5 or claim 6 includes these “joints”. Each of the joints 23, 24, 25 has substantially the same diameter, and flat surfaces are formed above and below the joints 23, 24, 25 along the extending direction and the juxtaposed direction. A mounting bracket (mounting member) 16 is attached to the joints 23, 24, and 25 using the plane as a mounting surface, and the dynamic vibration absorber 11 is mounted on the mounting bracket 16. Further, a discharge pipe joint 22 for connecting the discharge pipe 3 is formed in a J shape and provided on the other side of the four-way switching valve 7. The discharge pipe joint 22 also becomes a part of the discharge pipe 3 after the discharge pipe 3 is connected. The four-way switching valve 7 is provided with an electromagnetic valve 21 for moving the valve body.

FIG. 2 shows the dynamic vibration absorber 11, wherein FIG. 2 (a) is a plan view, FIG. 2 (b) is a front view, and FIG. 2 (c) is a side view. As shown in these figures, in the dynamic vibration absorber 11, on a rectangular metal plate 14,
A weight 12 having a mass of about 200 g is attached to four rubber columns (elastic body).
13 ... supported and provided. Bolt holes 20, 20 are formed in both ends of the metal plate 14, which are exposed upward from the sides of the weight 12, respectively. Next, FIG. 1 shows the joints 23, 24, 25 of the four-way switching valve 7.
FIG. 3 is a cross-sectional view showing the dynamic vibration absorber 11 attached to the vehicle. The dynamic vibration absorber 11 is attached to a mounting bracket 16 provided on the joints 23, 24, and 25. The mounting bracket 16 includes a bottom member 18 having a U-shaped cross section and a flat lid 17. It is. Then, the mounting bracket 16 is connected to the joint 2.
In order to attach to the joints 3, 24, 25, first, the joints 23, 24, 25 are covered with a heat insulating material 15 from the periphery, and the joints 23, 24, 25 covered with the heat insulating material 15 are sandwiched from above and below. The body 17 and the bottom member 18 are brazed and fixed. The dynamic vibration absorber 11 is mounted on the upper surface of the lid 17 of the mounting bracket 16 fixed to the joints 23, 24, 25 in this manner.
Is placed. Then, the bolt 19 inserted into the bolt hole 20 is screwed to the lid 17, and the dynamic vibration absorber 11 is fixed to the mounting bracket 16. That is, the joint 2
That is, the dynamic vibration absorber 11 is mounted using a plane formed along the extending direction and the parallel direction of 3, 24, 25 as a mounting surface.

In the outdoor unit of the air conditioner configured as described above, the four-way switching valve 7 has the discharge pipe 3, the suction pipe 4, the first
The gas pipe 5 and the second gas pipe 6 are connected in a concentrated manner, and these pipes 3, 4, 5, and 6 serve as paths for transmitting vibration generated in the compressor 1 to the casing. .
Therefore, as described above, the joints 23, 24, 2 of the four-way switching valve 7
By attaching the dynamic vibration absorber 11 to 5, the vibration transmitted from the compressor 1 to the casing can be reduced in the transmission path. Since the vibration transmitted from the compressor 1 to the casing is a main factor of the outdoor unit noise, the outdoor unit can improve its quietness. In addition, the dynamic vibration absorber 11 includes a joint 23 including a suction pipe joint 24 to which the suction pipe 4 is connected and part of which is connected.
4, 25 are attached. Therefore, vibration transmitted from the compressor 1 to the casing can be reliably reduced.
The vibration transmitted from the compressor 1 to the bottom plate 8 is absorbed by the vibration isolating rubber 26.

FIG. 5 is a graph showing the vibration acceleration at the portion where the dynamic vibration absorber 11 is attached, for each operating frequency. The solid line shows the case where the dynamic vibration absorber 11 is not provided, and the broken line shows the case where the dynamic vibration absorber 11 is attached. The bold line indicates the vibration in the X direction (the extending direction of the joints 23, 24, 25), and the thin line indicates the Y direction (the joints 23, 24, 2).
5 are shown in FIG. 4). From the figure, it can be seen that, when the dynamic vibration absorber 11 was not attached, the vibration that was remarkable at the operation frequency of 20 to 25 Hz was changed to the dynamic vibration absorber 1.
It can be seen that the number has been drastically reduced by attaching 1.

Further, the vibration energy of the compressor 1 itself is not absorbed by the dynamic vibration absorber 11 as in the conventional example, but a vibration transmission system mainly constituted by the pipes 3, 4, 5, 6 and the four-way switching valve 7. Is absorbed by the dynamic vibration absorber 11. Since the mass of the vibration transmission system is much smaller than the mass of the compressor 1, the mass of the
g. Therefore, the dynamic vibration absorber 11 can be reduced in size and weight, and the cost of the outdoor unit can be reduced. In addition, since the dynamic vibration absorber 11 can be mounted without being restricted by space by reducing the size and weight of the dynamic vibration absorber 11, even a vertical compressor can be easily mounted. In particular, in the above description, the dynamic vibration absorber 11 is provided near the four-way switching valve 7, but the four-way switching valve 7 is located above the compressor 1, and the vicinity thereof is an empty space. There is no member that hinders the weight 12 from swinging. Therefore, the space in the casing can be effectively used to reduce the size of the device.

In the above description, the four-way switching valve 7
The fittings 16 are attached by sandwiching the joints 23, 24, and 25 between the lid 17 and the bottom member 18 from above and below. The dynamic vibration absorber 11 is fixed to the mounting bracket 16 with bolts 19. In other words, a plane formed along the extending direction and the juxtaposing direction of the joints 23, 24, and 25 is used as the mounting surface of the dynamic vibration absorber 11. By doing so, the mounting structure is reduced. It can be simple. In addition, joints 23, 24,
When pinching 25 from above and below, joints 23, 24, 25
Is covered with a heat insulating material 15. Therefore, it is possible to prevent heat from being generated between the fittings 16 and the dynamic vibration absorber 11 and each of the joints 23, 24, 25, and to maintain good air conditioning performance.

Although the specific embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and can be variously modified and implemented within the scope of the present invention. For example, in the above, the joint 23 of the four-way switching valve 7,
The dynamic vibration absorber 11 was attached to the pipes 24 and 25.
The pipes 4, 5, and 6 may be attached to portions other than the joints 23, 24, and 25, and the pipes 4, 5, and 6 may be attached to both the joints 23, 24, and 25. Good. In the above description, the four-way switching valve 7
Of these, the dynamic vibration absorber 11 was attached to the side to which the suction pipe 3, the first gas pipe 5, and the second gas pipe 6 were connected, but this was attached to the side to which the discharge pipe 3 was connected. It may be attached to the four-way switching valve 7 itself.
Further, although the rubber damper 13 is used as the elastic body for supporting the weight 12 in the dynamic vibration absorber 11, the weight 12 may be supported by another elastic body such as a spring. The present invention can also be applied to a compressor driven at a fixed operating frequency, a multi-cylinder compressor, or a horizontal compressor to obtain excellent effects.

[0035]

According to the outdoor unit of the air conditioner of the first aspect, the vibration which is transmitted from the compressor to the casing and is a main factor of the noise can be reduced, so that the quietness can be improved. . Further, since the dynamic vibration absorber can be reduced in size and weight, the cost of the device can be reduced, and the dynamic vibration absorber can be mounted without being restricted by space.

In the outdoor unit of the air conditioner according to the second aspect,
Since the vibration can be reduced by a single dynamic vibration absorber, the cost of the device can be further reduced, and the required mounting space can be reduced.

Further, in the outdoor unit of the air conditioner of the third aspect, it is possible to reduce the size of the equipment by effectively utilizing the empty space, which is suitable for implementation.

In the outdoor unit of the air conditioner according to the fourth aspect, since the mounting surface is a plane formed by the plurality of pipes arranged in parallel, the mounting structure of the dynamic vibration absorber can be simplified.

In the outdoor unit of the air conditioner according to the fifth aspect, a mounting structure suitable for implementation can be obtained.

In the outdoor unit of the air conditioner according to the sixth aspect, by providing heat insulation between the dynamic vibration absorber and each pipe, it is possible to mount the dynamic vibration absorber without impairing good air conditioning performance. Become.

In the outdoor unit of the air conditioner of the present invention, a dynamic vibration absorber is provided in any of the pipes connected to the compressor and transmitting the vibration of the compressor. Therefore, the vibration transmitted from the compressor to the casing can be reliably reduced.

[0042] In the outdoor unit of the air conditioner according to any one of claims 8 to 10, the vibration transmitted to the casing can be particularly significantly reduced by the dynamic vibration absorber.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an attached state of a dynamic vibration absorber provided in an outdoor unit of an air conditioner according to an embodiment of the present invention.

2A and 2B are diagrams showing the dynamic vibration absorber, wherein FIG. 2A is a plan view, FIG. 2B is a front view, and FIG. 2C is a side view.

FIGS. 3A and 3B are diagrams showing members near the four-way switching valve to which the dynamic vibration absorber is attached, wherein FIG. 3A is a side view and FIG. 3B is a bottom view.

FIG. 4 is a partial perspective view of the outdoor unit.

FIG. 5 is a graph comparing vibration acceleration when the dynamic vibration absorber is mounted and when it is not mounted.

FIG. 6 is a side view showing a vibration damping device provided in a conventional outdoor unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Outdoor heat exchanger 3 Discharge pipe 4 Suction pipe 5 1st gas pipe 6 2nd gas pipe 7 Four way switching valve 11 Dynamic vibration absorber 12 Weight 13 Rubber pillar 15 Insulation material 16 Mounting bracket

Claims (10)

[Claims] 1. A compressor (1) and an outdoor heat exchanger (2)
And a discharge pipe (3), a suction pipe (4) of the compressor (1),
The casing includes a first gas pipe (5) connected to the outdoor heat exchanger (2) and a second gas pipe (6) connected to the indoor heat exchanger provided in the indoor unit. In an outdoor unit of an air conditioner provided therein, a dynamic vibration absorber (11) having an elastic body (13) and a weight (12) supported by the elastic body (13) is compressed by the compression unit. An outdoor unit for an air conditioner, wherein the outdoor unit is provided so as to absorb vibrations of pipes (3), (4), (5), and (6) connecting the unit (1) to a casing. 2. The dynamic vibration absorber (11) includes a compressor (1).
The outdoor unit of an air conditioner according to claim 1, wherein the discharge pipe (3) and the suction pipe (4) are provided in a centrally disposed portion. 3. The discharge pipe (3), the suction pipe (4),
A four-way switching valve (7) to which a first gas pipe (5) and a second gas pipe (6) are connected is provided in a casing, and the dynamic vibration absorber (11) is provided with the four-way switching valve (7). The outdoor unit of the air conditioner according to claim 2, wherein the outdoor unit is provided in the vicinity of the air conditioner. 4. The four-way switching valve (7) is configured such that a plurality of pipes (4), (5) and (6) are connected side by side on one side thereof. The dynamic vibration absorber (11)
The outdoor of an air conditioner according to claim 3, wherein a plane formed along the extending direction and the juxtaposing direction of the plurality of pipes (4), (5), (6) is provided as a mounting surface. Machine. 5. The plurality of pipes (4), (5) and (6) connected to the four-way switching valve (7) are connected to the pipes (4).
(5) The mounting member (16) is fixed so as to sandwich (6) in a direction substantially perpendicular to the extending direction and the juxtaposed direction,
The outdoor unit of an air conditioner according to claim 4, wherein the dynamic vibration absorber (11) is provided on the mounting member (16). 6. The heat insulating material (1), wherein the mounting member (16) is provided.
The outdoor unit for an air conditioner according to claim 5, wherein the outdoor unit is attached to the plurality of pipes (4), (5), and (6) via (5). 7. The discharge pipe (3) or the suction pipe (4) is connected to at least one side of the four-way switching valve (7) to which the dynamic vibration absorber (11) is attached. The outdoor unit of an air conditioner according to any one of claims 4 to 6, wherein: 8. The outdoor unit of an air conditioner according to claim 1, wherein the compressor (1) is controlled so as to change an operation frequency. 9. The outdoor unit for an air conditioner according to claim 1, wherein said compressor (1) is of a one-cylinder type. 10. The outdoor unit of an air conditioner according to claim 1, wherein the compressor (1) is a vertically mounted compressor.