JPH11159813A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the propagation of vibration from an inner soundproof material to an outer soundproof material, by winding a band-shaped inner soundproof material and outer soundproof material around the side of a compressor mounted on the bottom of a casing, and providing the inner soundproof material with a slit. SOLUTION: An outdoor heat exchanger 22 and a compressor 23 are attached onto a bottom plate 21 of the casing of an outdoor machine, and the compressor 23 is mounted vertically, with its feet 23a-23c screwed by bolt to the bottom plate 21 of the casing through vibrationproof rubber. An inner soundproof material 5 is made in band form by sticking a rubber layer and a flame retardant felt layer to each other, and vertical slits 53-57 are made at regular intervals in the positions where they should be abutted against the side of an accumulator after winding on the inner soundproof material 5. An outer soundproof material 6 is made in band form by sticking a rubber layer and a flame retardant felt layer to each other, and this air conditioner is provided with fixers 61 and 62 with strings 65 and 66 in the vicinity of one side edge, and is provided with fixers 63 and 64 to hook the strings 65 and 66 at the other side edge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an air conditioner. More specifically, the present invention relates to a soundproof structure of a compressor provided in an air conditioner.

[0002]

2. Description of the Related Art An air conditioner, particularly an outdoor unit, is often provided integrally with a compressor that compresses and discharges a refrigerant and an accumulator that performs gas-liquid separation of the recirculated refrigerant. Such a compressor is mounted on the bottom plate of the outdoor unit casing, and the accumulator is integrally mounted on the side of the compressor. Then, in order to prevent the operating noise of the compressor from leaking to the outside of the outdoor unit, the compressor and the accumulator are covered with a soundproof material formed by bonding a rubber layer and a felt layer. That is, a soundproofing material (this is referred to as “bottom soundproofing material”) is laid on the bottom plate of the outdoor unit casing, and two band-like soundproofing materials (around the side contours of the compressor and the accumulator). Each of the inner sound insulating material and the outer sound insulating material is wound one turn (double winding), and another sound insulating material (which is referred to as “double sounding”) is placed on the upper end of the wound outer sound insulating material. Called "canopy soundproofing material") is fitted like a lid.

[0003]

By the way, in the conventional air conditioner, in order to enhance the soundproofing effect, the thickness and the specific gravity of the rubber layer of the soundproofing material are increased, and the thickness of the felt layer for the purpose of improving the sound absorbing performance is increased. Various measures have been taken. However, in the above-described soundproofing structure, the inner soundproofing material abuts the compressor and the side of the accumulator, and the inner soundproofing material (especially, the side of the accumulator is wound because of the arrangement with other elements of the outdoor unit). Parts, etc.) may contact the outer sound insulation. In such a case, there is a problem that the vibration of the compressor is directly transmitted to the inner sound insulating material, further transmitted from the inner sound insulating material to the outer sound insulating material, and the sound insulating effect is impaired.

An object of the present invention is to provide an air conditioner that can enhance the soundproofing effect by suppressing the propagation of vibration from the inner soundproofing material to the outer soundproofing material.

[0005]

According to a first aspect of the present invention, there is provided an air conditioner, comprising: a compressor for compressing and discharging a refrigerant on a bottom plate of a casing; In an air conditioner in which a band-shaped inner sound insulating material and an outer sound insulating material are respectively wound around the side of the machine,
A slit is provided in the inner soundproofing material.

In the air conditioner of the first aspect, the presence of the slit suppresses the propagation of vibration from the inner soundproofing material to the outer soundproofing material, thereby enhancing the soundproofing effect.

[0007] The air conditioner according to the second aspect is the first aspect.
In the air conditioner according to the above, an accumulator is attached to the side of the compressor, the inner soundproofing material and the outer soundproofing material respectively wind the compressor and the accumulator together, and the slit is the inner soundproofing material. Of the accumulator is provided at least in a portion that comes into contact with a side portion of the accumulator.

In the air conditioner according to the second aspect, noise and vibration generated by the compressor and the accumulator are blocked by the soundproofing material, and the soundproofing effect is enhanced. In addition, since the slit is provided at a portion of the inner soundproofing material that contacts at least the side of the accumulator, when the inner soundproofing material and the outer soundproofing material are in contact around the side of the accumulator, Vibration propagation from the inner soundproofing material to the outer soundproofing material is effectively suppressed in the contact area, and the soundproofing effect is further enhanced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an air conditioner of the present invention will be described in detail with reference to embodiments.

FIG. 10 schematically shows a refrigerant circuit of an air conditioner to which the present invention is applied. This air conditioner is a separate type in which the outdoor unit 20 and the indoor unit 1 are connected by refrigerant pipes 41 and 42. The indoor unit 1 is provided with an indoor heat exchanger 2. The outdoor unit 20 includes a compressor 23 that compresses and discharges the refrigerant, a four-way switching valve 25 for switching the refrigerant flow path, an outdoor heat exchanger 22, an electric expansion valve 26 that adiabatically expands the refrigerant, An accumulator 24 for performing gas-liquid separation of the refluxed refrigerant is provided.

During the cooling operation, the refrigerant discharged by the compressor 23 is supplied to the pipe 31, the four-way switching valve 25, the pipe 33 and the outdoor heat exchanger 2 by setting the switching of the four-way switching valve 25.
2, sent to the indoor heat exchanger 2 through the pipe 36, the electric expansion valve 26, the pipes 37 and 42, and compressed from the indoor heat exchanger 2 through the pipes 41 and 34, the four-way switching valve 25, the pipe 32, the accumulator 24, and the pipe 35. To the machine 23. On the other hand, at the time of the heating operation, the four-way switching valve 25 is switched, and the refrigerant discharged by the compressor 23 is sent to the indoor heat exchanger 2 through the pipe 31, the four-way switching valve 25, the pipe 34, and the pipe 41, and the indoor heat exchange is performed. Pipes 42 and 37, electric expansion valve 26, outdoor heat exchanger 22, pipe 3
3, four-way switching valve 25, pipe 32, accumulator 24,
It returns to the compressor 23 through the pipe 35.

FIG. 7 (a) is a top view of a state in which the outdoor unit 20 is being assembled, and FIG. 7 (b) is a view of the outdoor unit 20 viewed from the front (front). (c) shows the outdoor unit 20 viewed from the right side (the same applies to FIGS. 8 (a), (b) and (c) described later). An L-shaped outdoor heat exchanger 2 is provided on the bottom plate 21 of the outdoor unit casing.
2 and a compressor 23 are attached. Compressor 23
Is a main body 23d having a substantially cylindrical outer shape with a height of 230 mm.
And three legs 23a, 23b and 23c projecting radially from the lower edge of the main body 23d.
a, 23b, 23c are mounted vertically by bolting them to the casing bottom plate 21 via vibration isolating rubbers 27a, 27b,. The accumulator 24 has a substantially cylindrical shape smaller than the compressor body 23d, and is attached to a side portion thereof in parallel with the compressor body 23d. Note that a four-way switching valve 25 and an electric expansion valve 26 are disposed above the compressor 23. A pipe 32 connecting the four-way switching valve 25 and the accumulator 24 is largely meandered up and down to absorb vibration. That is, it falls downward from the four-way switching valve 25, curves downwardly convex and rises upward, further curves upwardly convexly and faces downward, and is connected to the upper part of the accumulator 24.

The outdoor unit 20 uses soundproofing members 5, 6, 7, and 8 shown in FIGS. 1 to 4 in order to prevent the operating sound of the compressor 23 and the accumulator 24 from leaking outside the outdoor unit.

The inner sound insulating material 5 shown in FIG. 1 is formed in a belt shape by laminating a rubber layer 91A and a flame-retardant felt layer 92A. The rubber layer 91A has a specific gravity of 1.8 to 2.0 and a thickness of 2 m.
m, and the felt layer 92A is made of cotton or hemp as a main component, and is impregnated with a flame-retardant material and coated with a resin to a thickness of 5 mm (each rubber layer, each felt layer described later). Is similar.). The height (width of the band) of the inner soundproofing material 5 is set to approximately half (125 mm in this example) the height of the compressor 23, and the length of the inner soundproofing material 5 in the left-right direction in FIG. ) Is an integrated compressor 23
And the length of the outline of the side portion of the accumulator 24 (570 mm in this example). On the upper edge 5a of the inner soundproofing material 5, five vertical slits 53, 54, 55, 56, 57 are formed at regular intervals at positions to be brought into contact with the side portions of the accumulator 24 after winding. I have. In this example, the vertical length of each of the slits 53,..., 57 is set to 20 mm, and the interval therebetween is set to 35 mm. The slits 53,..., 57 do not form a gap, and portions on both sides of the inner soundproofing material 5 sandwiching the slits 53,. The lower edge 5b of the inner soundproofing material 5 is wound around the leg 23a of the compressor 23 after winding.
U-shaped notch 5 at the position corresponding to 23b
1, 52 are provided. In this example, each notch 5
The height of 1, 52 is set to 30 mm, and the width in the left-right direction in FIG. 1 is set to 35 mm.

The outer sound insulating material 6 shown in FIG. 2 is formed in a belt shape by laminating a rubber layer 91B and a flame-retardant felt layer 92B. The height (width of the band) of the outer sound insulating material 6 is set to a value (315 mm in this example) exceeding the height of the compressor 23,
The length of the outer sound insulating material 6 in the left-right direction in FIG. 1 (the length of the band) is determined by considering the fact that the outer sound insulating material 6 is wound around the inner sound insulating material 5. The value is set slightly longer (100 mm in this example). In the vicinity of one side edge 6d (the rubber layer 91B side) of the outer soundproof material 6, a pair of upper and lower stoppers 61, 62 with strings 65, 66 are provided, respectively. Stops 63 and 64 for hooking the strings 65 and 66 are provided at positions corresponding to the other side edge 6c (the rubber layer 91B side).

FIG. 3 (a) shows the bottom soundproofing material 7 as viewed from above, and FIG. 3 (b) shows the same as in FIG. 3 (a) as viewed from the right side. The bottom soundproofing material 7 has two portions 71 and 72 each formed by bonding a rubber layer 91C and a flame-retardant felt layer 92C. As can be seen by comparing FIG. 7 (a) with FIG. 7 (a), the outline of the bottom soundproofing material 7 in the plan view is the same as the compressor 23 of the casing bottom plate 21.
The setting is made so as to correspond to the vicinity portion. In addition, two cutouts 71d, 72d corresponding to the compressor body 23d and cutouts 7 corresponding to the legs 23a, 23b, 23c of the compressor are formed in the two portions 71, 72 of the bottom soundproofing material 7.
2a, 72b and 72c are formed. Thanks to such a shape, the bottom soundproofing material 7 can be laid successfully on the portion of the casing bottom plate 21 near the compressor 23.

FIG. 4A shows the canopy soundproof material 8 viewed from above, and FIG. 4B shows the canopy soundproof material 8 viewed from the right side. This canopy soundproofing material 8 has a rubber layer 91.
D has a three-layer structure in which flame-retardant felt layers 92D and 92E are attached to both surfaces. As can be seen by comparing FIG. 4 (a) and FIG. 8 (a), the outline in the plan view of the canopy soundproofing material 8 is the outer soundproofing material in a state in which the side portions of the compressor 23 and the accumulator 24 are wound. 6 are set substantially corresponding to the closed shape created by the upper edge 6a. Also, the outer periphery 8 of the canopy soundproofing material 8
a are formed with notches 81, 82, and through holes 83, 84, 85 for passing pipes are formed inside 8b of the canopy soundproof material 8.
Are formed. The notches 81 and 82 are used to pass a communication wire or the like that energizes the compressor. Further, a slit 86 connecting the outer periphery 8a and the through hole 83 is formed in order to cause a portion of the pipe 32 that falls downward from the four-way switching valve 25 to cross from the outer periphery 8a into the through hole 83. . Similarly, a slit 87 connecting the through holes 84 and 85 is formed to guide a portion of the pipe 32 that is convexly curved upward on the accumulator 24 side to the through holes 84 and 85. These slits 86 and 87 do not form a gap so that the soundproofing effect is not reduced, and the portions of the canopy soundproofing material 8 on both sides sandwiching the slits 86 and 87 are in contact with each other. Thanks to such a shape, the canopy soundproof material 8 can be successfully fitted to the upper part of the outer soundproof material 6.

Next, a procedure for installing the above-mentioned soundproofing members 5, 6, 7, 8 will be described.

First, as shown in FIG. 5, the bottom soundproofing material 7 shown in FIG. 3 is laid on the casing bottom plate 21.
The bottom insulation 7 is divided into two parts 71 and 72 as described above, and each part 71 and 72 has a compressor 23.
Cutouts 71d, 72d, 72a, 72b, and 72c corresponding to the main body 23d and the legs 23a, 23b, and 23c are formed on the casing bottom plate 21 above the compressor 23 near the compressor 23. Can be laid easily. 6 and 7 described later for simplicity.
8 (a) and FIG. 8 (a), the sound insulating material 7 at the bottom is omitted.

Next, as shown in FIG.
And the accumulator 24 are put together, and the inner sound insulating material 5 shown in FIG. 1 is wound around the side. At this time,
One side edge 5d of the inner soundproofing material 5 abuts on the lower side surface of the compressor body 23d (the notch 51 is aligned with the leg 23a of the compressor), while the other side edge 5c is connected to the accumulator 24.
Pipe 32 and the compressor body 23d
And pass between. Then, as shown in FIG.
The other side edge 5c is overlapped on one side edge 5d. As a result, as shown in FIGS. 7 (a), (b) and (c), the inner soundproofing material 5 is wound around the outline of the lower side of the compressor 23 and the accumulator 24. The slits 53,..., 57 formed on the upper edge of the inner soundproofing material 5 are provided in the accumulator 24.
It is located at the part that abuts the side surface. Also, the slits 51, 52 formed on the lower edge of the inner soundproofing material 5 are in a state corresponding to the legs 23a, 23b of the compressor. Therefore,
The lower edge 5b of the inner soundproofing material 5 is provided in almost all areas except the slits 51 and 52 so as not to deteriorate the soundproofing effect.
Can be abutted.

Next, as shown in FIG. 6, the outer sound insulating material 6 shown in FIG. 2 is wound around the inner sound insulating material 5 (omitted in FIG. 6 for easy understanding). At this time, one side edge 6c of the outer sound insulating material 6 is inserted into the back side of the accumulator 24 through the side of the heat exchanger 22 and passed along the side surface of the accumulator 24.
And the pipes 37 and 34,
Match to the closer corner of 3a. Then, as shown in FIG. 8 (b), in a state where the other side edge 6d is superimposed on the one side edge 6c, the stoppers 61 and 63 are wound and engaged with the string 65,
The stops 62 and 64 are wound around the string 66 and engaged. As a result, as shown in FIGS. 8A, 8B, and 8C, the outer soundproofing material 6 is wound around the inner soundproofing material 5. The lower edge 6b of the outer soundproofing material 6 is in contact with the bottom soundproofing material 7 over the entire area so as not to lower the soundproofing effect. Further, the outer soundproofing material 6 comes into contact with the legs 23 a and the pipe 32 of the compressor, and
d is spaced apart from the inner soundproofing material 5 around the side surface while partly in contact with the inner soundproofing material 5 around the accumulator 24 side surface.

Next, as shown in FIG. 8B, a canopy soundproofing material 8 like a lid is placed on top of the outer soundproofing material 6 in this state.
(Not shown in FIG. 8A for easy understanding). At this time, the pipe 32 and the like pass through holes 83, 84,
85, so as to pass through the notches 81 and 82. The contour of the canopy soundproof material 8 is set substantially corresponding to the closed shape formed by the upper edge 6a of the outer soundproof material 6, and both the outer soundproof material 6 and the canopy soundproof material 8 are made of a material having flexibility. Therefore, the canopy soundproof material 8 fits tightly on the upper part of the outer soundproof material 6 so as not to deteriorate the soundproofing effect.

Thus, the four soundproofing materials 5, 6, 7,
8 to form a soundproof structure that covers the compressor 23 and the accumulator 24. In this soundproofing structure, since the inner soundproofing member 5 is provided with the slits 53,..., 57, the propagation of vibration from the inner soundproofing member 5 to the outer soundproofing member 6 can be suppressed by the presence of the slits 53,. , Can enhance the soundproofing effect.

Since the slits 53,..., 57 are provided at portions of the inner soundproofing material 5 that abut against the side surfaces of the accumulator 24, the inner soundproofing material 5 and the outer soundproofing material 6 around the side surfaces of the accumulator 24. In the region where the contact is made, the propagation of vibration from the inner soundproofing material 5 to the outer soundproofing material 6 can be effectively suppressed, and the soundproofing effect can be further enhanced.

The above-mentioned slits 53,..., 57 do not form a gap, and the portions on both sides of each of the slits 53,. It is considered that the vibration energy transmitted to the soundproofing material 5 is absorbed by the friction on both sides sandwiching the slits 53,. Therefore, the propagation of vibration from the inner soundproofing material 5 to the outer soundproofing material 6 can be further suppressed, and the soundproofing effect can be further enhanced.

FIG. 9 shows the state during cooling operation (compressor 23 operates at 6
The frequency distribution of the operation sound observed outside the outdoor unit 1 at the time of 33 rotations) is shown when the slits 53,..., 57 are provided (FIG. 12A), and when the slits 53,. (B)). As can be seen from this figure, the provision of the slits 53,..., 57 effectively reduces the driving noise in the frequency band of 100 to 315 Hz. In the entire frequency band, the slit 53,
, 57, the driving sound is 44.2 (FIG. 7A).
In the case where 9 dB (A) and the slits 53,..., 57 are not provided ((b) in the figure), the driving sound is 46.47 dB (A), and the provision of the slits 53,. Could be reduced.

[0027]

As is apparent from the above description, in the air conditioner of the first aspect, since the slit is provided in the inner soundproofing material, the vibration from the inner soundproofing material to the outer soundproofing material is caused by the presence of the slit. Propagation can be suppressed, and the soundproofing effect can be enhanced.

[0028] In the air conditioner according to the second aspect, the slit is provided in at least a portion of the inner soundproofing material that contacts the side of the accumulator, so that the inner soundproofing material is provided around the side of the accumulator. When the outer sound insulating material and the outer sound insulating material are in contact with each other, the propagation of vibration from the inner sound insulating material to the outer sound insulating material can be effectively suppressed in the contact area.
Therefore, the soundproofing effect can be further enhanced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an inner sound insulating material used in an air conditioner according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an outer soundproofing material used in the air conditioner.

FIG. 3 is a diagram showing a bottom soundproofing material used in the air conditioner.

FIG. 4 is a diagram showing a canopy soundproofing material used in the air conditioner.

FIG. 5 is a diagram illustrating a method of attaching the inner soundproofing material.

FIG. 6 is a diagram illustrating a method of attaching the outer sound insulating material.

FIG. 7 is a diagram showing a state after the inner soundproofing material is attached to the air conditioner. (a) is a plan view, (b) is a front view, and (c) is a right side view.

FIG. 8 is a diagram showing a state after the canopy soundproofing material is attached to the air conditioner. (a) is a plan view, (b) is a front view, and (c) is a right side view.

FIG. 9 is a diagram illustrating a frequency distribution of an operation sound during a cooling operation of the air conditioner in comparison with a case where the slit of the inner sound insulating material is not provided.

FIG. 10 is a diagram showing a refrigerant circuit of the air conditioner.

[Explanation of symbols]

 Reference Signs List 5 inner soundproofing material 6 outer soundproofing material 7 bottom soundproofing material 8 canopy soundproofing material 20 outdoor unit 23 compressor 24 accumulator 25 four-way switching valve 26 electric expansion valve 53, ..., 57 slit

Claims (2)

[Claims] 1. A compressor (23) for compressing and discharging a refrigerant is mounted on a bottom plate (21) of a casing, and a band-shaped inner soundproofing material (around the side portion of the compressor (23)). 5) An air conditioner in which an outer sound insulating material (6) is wound, wherein the inner sound insulating material (5) is provided with slits (53, ..., 57). . 2. The air conditioner according to claim 1, wherein an accumulator (24) is attached to a side of the compressor (23), and the inner soundproofing material (5) and the outer soundproofing material (6) are respectively provided. The compressor (23) and the accumulator (24) are collectively wound and the slits (53,..., 57) abut on at least the side of the accumulator (24) of the inner soundproofing material (5). An air conditioner characterized by being provided in a part.