JP7241330B2 - Piping fixed structure and outdoor unit of air conditioner - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pipe fixing structure and an outdoor unit of an air conditioner.

Conventionally, when a compressor provided in an outdoor unit of an air conditioner operates, piping provided in the outdoor unit vibrates, and stress acts on the piping. For this reason, in order to suppress the vibration of the pipe and relax the stress generated in the pipe, a fixing structure is known in which the pipe is fixed using a fixing member to a fixed object located near the pipe (for example, , see Patent Document 1).
In addition, a pipe having a large outer diameter may be fixed to the bottom plate of the outdoor unit using a fixing member in order to suppress vibration.

JP 2017-101714 A

However, when fixing a pipe with a large outer diameter to the bottom plate of the outdoor unit, it is necessary to increase the size of the fixing member and provide a flange portion in order to give the fixing member sufficient rigidity, which increases the cost. I had something to do.
SUMMARY OF THE INVENTION An object of the present invention is to provide a pipe fixing structure capable of relieving stress generated in pipes with a simple configuration.

The present invention comprises a pipe through which vibration of the compressor is transmitted when the compressor is driven, and a flat plate-shaped fixing member for fixing the pipe to a bottom plate on which the compressor is mounted, and the fixing member One end holds the pipe, the other end is fixed to the bottom plate, and at least one side edge located in the width direction that intersects the thickness direction of the fixing member is It is characterized by being in contact with a regulation surface provided on the bottom plate.

According to this, the fixing member is reinforced by the groove portion, and the vibration of the piping is suppressed with the fixing member having a simple structure.

ADVANTAGE OF THE INVENTION According to this invention, the stress which arises in piping can be relieved by simple structure.

1 is a perspective view schematically showing a state in which a cover member of an outdoor unit of an air conditioner according to an embodiment of the present invention is removed; FIG. A perspective view showing the internal structure of the outdoor unit A diagram showing the configuration of piping connected to each compressor and each second accumulator The side view which shows the structure of the lower part of a 1st accumulator. The perspective view which shows the structure of the fixing|fixed part of outlet side piping. Perspective view showing the configuration of the fixing member

A first invention includes a pipe for transmitting vibration of the compressor when the compressor is driven, and a flat fixing member for fixing the pipe to a bottom plate on which the compressor is mounted, and one end of the fixing member holds the pipe, the other end of the fixing member is fixed to the bottom plate, and at least one side edge in the width direction of the fixing member is in contact with the regulating surface provided on the bottom plate. It is a piping fixed structure.
According to this, the side edge of the fixed member is supported by the restricting surface. Therefore, the rigidity against vibration in the width direction of the fixing member can be increased without providing a flange portion or the like on the fixing member, and vibration of the pipe can be suppressed with a simple structure.

According to a second aspect of the present invention, the bottom plate is provided with a reinforcing member having a flange portion that rises upward to form a restricting surface, and at least one side edge portion in the width direction of the fixing member is in contact with the flange portion. The pipe fixing structure is characterized by:
According to this, the side edge portion of the fixing member is supported by the flange portion of the reinforcing member provided on the bottom surface. Therefore, the rigidity against vibration in the width direction of the fixing member can be increased without providing the fixing member with a flange portion or the like.

In a third aspect of the invention, the fixing member is fixed to the bottom plate via a reinforcing member, the reinforcing member has a connecting portion, the flange portions are raised upward from both sides of the connecting portion, and the fixing member The other end of the fixing member is fixed to the connecting portion, and both side edge portions of the fixing member are in contact with the pair of flange portions, respectively.
According to this, the fixing member is supported on both sides in the width direction by the pair of flange portions. Therefore, the rigidity against vibration in the width direction of the fixing member can be increased without providing the fixing member with a flange portion or the like.

A fourth aspect of the present invention is a pipe fixing structure, wherein the bottom plate is composed of a plurality of plate-like members, and the reinforcing member is a member for fixing the plurality of plate-like members to each other.
According to this, the reinforcing member is a member that prevents the bottom plate from bending during transportation of the outdoor unit, and the reinforcing member reinforces the bottom plate. Since the fixing member is reinforced using this reinforcing member, vibration of the pipe can be suppressed with a simple structure.

A fifth aspect of the invention is an outdoor unit for an air conditioner, comprising the pipe fixing structure according to any one of the first to fourth aspects of the invention.
According to this, it is possible to obtain an outdoor unit of an air conditioner provided with a piping fixing structure capable of suppressing vibration of the piping with a simple configuration.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view schematically showing a state in which a cover member of an outdoor unit of an air conditioner according to an embodiment of the present invention is removed, and FIG. 2 is a perspective view showing the internal structure of the outdoor unit 1. FIG. .
The outdoor unit 1 of this embodiment is used in a refrigeration cycle of an air conditioner. The outdoor unit 1 includes a housing 2 as shown in FIG. The base frames 3 are installed on opposite sides of the housing 2 .
One side, which is the front side, of the housing 2 shown in FIG. 1 is covered with a cover member (not shown).
A bottom plate 4 is attached to the lower portion of the housing 2 , and a top plate 5 is attached to the upper portion of the housing 2 . A grid-like exhaust port 6 is formed in the top plate 5 .
A wooden frame 7 having a predetermined height is provided in the lower part of the outdoor unit 1 along the outer shape of the housing 2 .

The interior of the housing 2 is divided into a heat exchange chamber 8 and a mechanical chamber 9 .
The heat exchange chamber 8 is provided inside and above the housing 2 and includes a heat exchanger (not shown), a blower fan 10 , and an electric equipment box 11 .
A heat exchanger (not shown) is formed in a U shape in plan view along the inner surface of the housing 2 .
The blower fan 10 is installed above the inside of the housing 2 so as to face the exhaust port 6 . The outdoor unit 1 of the present embodiment rotates the blower fan 10 to take in air from the side surface of the housing 2, pass through a heat exchanger (not shown) to exchange heat, and then discharge the air through the upper exhaust port 6. It is a so-called top-flow type outdoor unit that discharges from.
The electrical equipment box 11 includes a predetermined electronic circuit board and the like, and is arranged above the front side of the housing 2 .

The machine room 9 is provided inside and below the housing 2 . In this embodiment, the machine room 9 contains two compressors 12, 14, a first accumulator 16, two second accumulators 18, 20, an oil separator 22, two four-way valves 24, etc. A refrigerating cycle circuit of the air conditioner is configured by connecting these with respective refrigerant pipes.

FIG. 3 is a diagram showing the configuration of piping that connects the compressors 12, 14 and the second accumulators 18, 20. As shown in FIG. 3, the compressors 12, 14 and the second accumulators 18, 20 are omitted. 4 is a side view showing the structure of the lower portion of the first accumulator 16. As shown in FIG. 4, one leg portion 44 of the first accumulator 16 is omitted.
Each compressor 12, 14 is mounted on the bottom plate 4 adjacent to each other. Each compressor 12, 14 compresses and discharges refrigerant, and circulates the refrigerant in the refrigeration cycle. Each compressor 12, 14 is connected in parallel within the refrigeration cycle circuit.

One end of a suction pipe (not shown) that supplies refrigerant to the compressors 12 and 14 is connected to the suction side of each of the compressors 12 and 14, and these suction pipes are upstream of the second accumulators. 18 and 20 are connected.
One end of a pair of first discharge pipes 28, 30 through which compressed refrigerant flows is connected to the discharge side of each compressor 12, 14. As shown in FIG. They merge on the downstream side and are connected to one second discharge pipe 32 . The other end of the second discharge pipe 32 is connected to the four-way valve 24 via the oil separator 22 . The heat exchanger described above is connected to the second discharge pipe 32 via a capillary tube 34, a receiver tank (not shown), and the like.
In addition, in this embodiment, the outer diameter of the suction pipes connected to the compressors 12 and 14 is larger than the outer diameter of the first discharge pipes 28 and 30 .

The first accumulator 16 is a gas-liquid separator that separates gas refrigerant and liquid refrigerant, and the first accumulator 16 is formed in a vertically long hollow body. The first accumulator 16 includes an inlet-side pipe (not shown) and an outlet-side pipe 36, both of which extend from the inside of the first accumulator 16 to the outside.
The inlet-side pipe is a refrigerant pipe that supplies refrigerant to the first accumulator 16 , and the other end of this inlet-side pipe is connected to the four-way valve 24 .

The outlet pipe 36 extends from the bottom of the first accumulator 16 toward the bottom plate 4, as shown in FIG. The outlet side pipe 36 has a parallel portion 36A that has one end connected to the first accumulator 16 and extends substantially parallel to the bottom plate 4, a rising portion 36B that rises upward from the other end of the parallel portion 36A, and a rising and a branch portion 38 to which the portion 36B is connected.
The parallel portion 36A extends along the bottom plate 4 from the first accumulator 16 toward the two compressors 12 and 14, and is the closest point to the bottom plate 4 in the outlet pipe 36.

A pair of branch pipes 40 and 42 are connected to the other end of the branch portion 38 to which the rising portion 36B is connected. Each branch pipe 40 , 42 connects to two second accumulators 18 , 20 each smaller than the first accumulator 16 . The second accumulators 18 and 20 of the present embodiment are gas-liquid separators that reseparate the liquid portion of the refrigerant that has not been completely separated by the first accumulator 16 .
In this embodiment, the outer diameters of the parallel portion 36A and the rising portion 36B of the outlet pipe 36 are larger than the outer diameters of the branch pipes 40 and 42 .

Further, the bottom (lower portion) of the first accumulator 16 is an oil reservoir 16A in which the oil separated from the gaseous refrigerant and the liquid portion of the refrigerant are accumulated. An oil return circuit 50 is provided at the bottom of the first accumulator 16 .
The oil return circuit 50 has an oil return pipe 52 and an electromagnetic valve 54 .
The oil return pipe 52 extends from the bottom of the first accumulator 16 and is connected to the outlet pipe 36 . That is, the oil return pipe 52 connects the oil reservoir 16A of the first accumulator 16 and the outlet pipe 36 . A strainer 56 is provided in the middle of the oil return pipe 52 .

The solenoid valve 54 is provided between the bottom of the first accumulator 16 and the strainer 56 in the oil return pipe 52, and the flow path of the oil return pipe 52 can be opened and closed by opening and closing the solenoid valve 54. there is Also, the solenoid valve 54 is screwed to one of the pair of legs 44 that support the first accumulator 16 .
By releasing the electromagnetic valve 54 and opening the flow path of the oil return pipe 52 , the oil stored in the oil reservoir 16</b>A and the liquid component of the refrigerant are introduced into the outlet pipe 36 .
In addition, the liquid content of the oil and the refrigerant returned to the outlet pipe 36 by the oil return pipe may be small, and the oil return pipe 52 has an outer diameter of less than that of the refrigerant pipes such as the inlet pipe and the outlet pipe 36. A small outer diameter is used.
In addition, the oil return circuit 50 of the present embodiment is positioned on the side of the parallel portion 36A when viewed from the extending direction of the parallel portion 36A of the outlet pipe 36, and when viewed from the side of the parallel portion 36A, The oil return circuit 50 is positioned between the first accumulator 16 and the rising portion 36B.

The four-way valve 24 switches the inlet side pipe and the second discharge pipe 32 so as to communicate with each refrigerant pipe connected to the indoor unit or the outdoor heat exchanger, thereby switching between cooling and heating.

Next, the structure of the bottom plate 4 will be explained.
The bottom plate 4 of the present embodiment is provided by connecting a plurality of plate-like members 45 across the pair of base frames 3 . Moreover, these plate-like members are fixed to each other by a plurality of reinforcing members 46 .
As shown in FIG. 2, the plate member 45A and the plate member 45B are fixed to each other by reinforcing members 46A and 46B. Each reinforcing member 46A, 46B is formed by bending a sheet metal so as to have a U-shaped cross section. Each of the reinforcing members 46A and 46B includes contact portions 46A1 and 46B1 that contact the plate-like members 45A and 45B, and a pair of flange portions 46A2 and 46B2 that extend upward from both ends of the contact portions 46A1 and 46B1 in the width direction. (regulatory surface). Each reinforcing member 46A, 46B is arranged such that its longitudinal direction is along the lateral direction of the plate-like members 45A, 45B, and is screw-fixed to the plate-like members 45A, 45B at two points at both ends.

As a result, when the outdoor unit 1 of the air conditioner is transported, it is possible to prevent the plate-like members from being twisted with each other due to vibration during transportation, and the strength of the bottom plate 4 can be ensured.
A groove portion 4C recessed downward is provided between the plate-like member 45A and the plate-like member 45B. The groove portion 4C has a predetermined width and extends along the longitudinal direction of the plate-like members 45A and 45B.

In addition, the compressors 12, 14 and the first accumulator 16 are both heavy in weight, and furthermore, these compressors 12, 14 and the first accumulator 16 have relatively large outer diameters among refrigerant pipes, Connected by heavy pipes. As a result, the weight tends to be concentrated on the bottom plate 4 between the two compressors 12 , 14 and between the compressors 12 , 14 and the first accumulator 16 . For this reason, the reinforcing member 46A is positioned between the two compressors 12, 14 and between the compressors 12, 14 and the first accumulator 16, as shown in FIGS. It is
Further, the reinforcement member 46A of the present embodiment extends so that its longitudinal direction is substantially parallel to the direction in which the parallel portion 36A of the outlet pipe 36 extends.

Next, a fixing structure for the outlet pipe 36 will be described.
5 is a perspective view showing the fixing structure of the outlet pipe 36, and FIG. 6 is a perspective view showing the structure of the support member 49. As shown in FIG.
As shown in FIG. 5, the outlet pipe 36 is fixed to the bottom plate 4 by a fixing member 47, more specifically, to a reinforcing member 46A provided on the bottom plate 4. As shown in FIG.
The fixed member 47 has a saddle 48 and a support member 49 .
The saddle 48 is an annular member, and the saddle 48 covers the outer periphery of the outlet pipe 36 at a portion near the parallel portion 36A of the rising portion 36B. As a result, the fixing member 47 can fix the outlet pipe 36 at a location near the bottom plate 4, and it is possible to suppress the longitudinal direction of the support member 49, which will be described later, from becoming longer.
The fixing member 47 of this embodiment fixes the outlet side pipe 36 at a portion near the parallel portion 36A of the rising portion 36B in order to improve workability when fixing or replacing the pipe. However, without being limited to this, the fixing member 47 may fix the outlet pipe 36 at the parallel portion 36A closer to the bottom plate 4 .

The support member 49 is formed by bending a plate-like member along the width direction of the member at three locations, and includes a fixing portion 49A, a leg portion 49B, and a bent portion 49C.
The fixed portion 49A is a portion to be connected to the saddle 48, and the fixed portion 49A has a screw hole 49A1. The fixing portion 49A and the saddle 48 are fixed by screws 58 inserted through the screw holes 49A1.

The leg portion 49B is provided by bending along the width direction of the support member 49 and in the thickness direction of the support member 49, and is inserted between a pair of flange portions 46A2 of the reinforcing member 46A. . The leg portion 49B has two screw holes 49B1, and is fixed to the contact portion 46A1 of the reinforcing member 46A by two screws 59 inserted through the screw holes 49B1.
In this embodiment, the portion where the foot portion 49B of the contact portion 46A1 is fixed is a portion that spans over the groove portion 4C. Therefore, on the bottom plate 4 side, the two screw holes through which the two screws 59 are inserted are not provided in the bottom plate 4, but are provided only in the contact portion 46A1 of the reinforcing member 46A.
Side edge portions 49D on both sides in the width direction of the support member 49 are in contact with the pair of flange portions 46A2. That is, the support member 49 is supported by the flange portions 46A2 on both sides in the width direction.

The bent portion 49C is positioned between the fixed portion 49A and the leg portion 49B, and is inclined when viewed from the side edge portion 49D. More specifically, the end of the bent portion 49C on the leg portion 49B side is farther from the oil return pipe 52 than the end on the fixed portion 49A side.
By providing this bent portion 49C, it is possible to provide the support member 49 without contacting the oil return pipe 52. As shown in FIG. That is, the bent portion 49C is provided to avoid contact between the support member 49 and the oil return pipe 52 or other refrigerant pipes.
Incidentally, if the support member 49 does not come into contact with the oil return pipe 52 or other refrigerant pipes depending on the pipe layout, the bent portion 49C may not be provided.

Next, the operation of this embodiment will be described.
In the heating operation of the air conditioner, when the outdoor unit 1 starts operating, the compressors 12 and 14 are driven. Each compressor 12, 14 consists of a first accumulator 16, second accumulators 18, 20, a capillary tube 34, an indoor heat exchanger (not shown), a heat exchanger (not shown) included in the outdoor unit 1, and each refrigerant pipe. The refrigerant sealed inside the refrigerating cycle is compressed, and the refrigerant is sent out via each refrigerant pipe.
After releasing heat in the indoor heat exchanger, the refrigerant flows through the pipe into the expansion valve, is decompressed by the expansion valve, and flows into the heat exchanger through the pipe.
The outdoor unit 1 drives the compressors 12 and 14 and rotates the blower fan 10 at the same time. A rotationally driven blower fan 10 sends air from the lower side of the outdoor unit 1 to the exhaust port 6 .
The air sent out passes through the heat exchanger, and heat exchange between the refrigerant flowing in the heat exchanger and the air is promoted. The refrigerant that has exchanged heat with the air is condensed. The refrigerant then exits the heat exchanger and flows through piping to each of the compressors 12, 14 before being compressed again.
On the other hand, the air that has undergone heat exchange with the refrigerant is discharged to the outside of the housing 2 from the exhaust port 6 by the blower fan 10 .
By repeating this operation, the outdoor unit 1 absorbs heat from the outdoor air into the refrigeration cycle and releases it indoors.
In the cooling operation of the air conditioner, the circulation direction of the refrigerant in the refrigeration cycle is opposite to that in the heating operation.

Here, when the compressors 12 and 14 are driven, the compressors 12 and 14 vibrate accordingly, and this vibration propagates to each refrigerant pipe and other equipment provided in the outdoor unit 1 .
Out of these refrigerant pipes, the outlet pipe 36 is relatively short in length and has the largest outer diameter, so the transmitted vibration is less likely to be attenuated and vibrates with a strong force.
In this embodiment, the outlet pipe 36 is fixed to the bottom plate 4 by a fixing member 47 at a location where the outlet pipe 36 is close to the bottom plate 4 . Specifically, the fixing member 47 fixes the outlet pipe 36 to the bottom plate 4 via a reinforcing member 46A.
As a result, the total length of the support member 49 included in the fixing member 47 does not become longer than necessary, and reduction in rigidity can be suppressed.
Further, the leg portion 49B of the support member 49 is fixed to the contact portion 46A1 of the reinforcing member 46A, and the support member 49 is supported on both sides in the width direction by respective flange portions 46A2.
As a result, when the outlet pipe 36 vibrates, the vibration of the support member 49 in the width direction is suppressed by the side edges 49D of the support member 49 coming into contact with the flange portions 46A2. That is, each flange portion 46A2 acts as a regulating surface of the fixed member 47, and vibration along the width direction of the fixed member 47 can be suppressed. Therefore, the rigidity in the width direction of the fixing member 47 can be increased by the pair of flange portions 46A2.
Therefore, it is not necessary to introduce a new member or provide a flange portion on the support member 49 of the fixing member 47, and the vibration of the outlet side pipe 36 can be controlled with a simple structure without changing the layout of each refrigerant pipe. can be suppressed.

According to the embodiment described above, the following effects are obtained.
In this embodiment, the outdoor unit 1 includes an outlet pipe 36 and a fixing member 47 that fixes the outlet pipe 36 to the bottom plate 4 . A saddle 48 provided on the fixing member 47 holds the outlet pipe 36 , and a leg portion 49 B of the support member 49 provided on the fixing member 47 is fixed to the contact portion 46 A 1 of the reinforcing member 46 A provided on the bottom plate 4 . Side edge portions 49D on both sides in the width direction of the support member 49 are in contact with a pair of flange portions 46A2 of the reinforcing member 46A.
As a result, the support member 49 included in the fixing member 47 is supported on both sides in the width direction by the respective flange portions 46A2. Therefore, the rigidity against vibration of the outlet pipe 36 in the width direction of the fixing member 47 can be increased without providing a flange portion or the like to the fixing member 47, and vibration of the outlet pipe 36 can be suppressed with a simple configuration. can.

In this embodiment, the bottom plate 4 is composed of a plurality of plate-like members, and the reinforcing member 46A is a member that fixes the plate-like member 45A and the plate-like member 45B to each other. Thereby, the fixing member 47 can be reinforced using the existing reinforcing member 46A. Therefore, it is not necessary to introduce a new member or provide a flange portion or the like on the support member 49 of the fixing member 47, and the vibration of the outlet pipe 36 can be suppressed with a simple structure at a reduced cost.

The above-described embodiment is an example of one aspect of the present invention, and can be arbitrarily modified and applied without departing from the scope of the present invention.

For example, the reinforcement member 46A of the present embodiment has the flange portions 46A2 on both sides of the contact portion, but the flange portions 46A2 may be provided on only one side.
Further, for example, the supporting member 49 of the present embodiment is configured to be supported by a pair of flange portions 46A2 provided on the reinforcing member 46A on both sides in the width direction. However, the present invention is not limited to this, and a flange portion extending upward is provided on the leg portion of the oil separator 22, the second accumulators 18, 20, etc., and the support member 49 is attached to the leg portion so that the side edge portion 49D is in contact with the flange portion. You can fix it to the part.
Alternatively, the support member 49 may be fixed to the groove 4C so that the side edge 49D is in contact with the side wall of the groove 4C of the bottom plate.

Further, for example, the outdoor unit 1 of the present embodiment has two compressors 12 and 14, but the invention is not limited to this, and may have three or only one compressor.

1 outdoor unit 4 bottom plate 12, 14 compressor 16 first accumulator 18, 20 second accumulator 24 four-way valve 28, 30 first discharge pipe 32 second discharge pipe 36 outlet side pipe 36A parallel portion 36B rising portion 38 branch portion 40, 42 branch pipe 45, 45A, 45B plate member 46, 46A, 46B reinforcing member 46A1, 46B1 contact portion 46A2, 46B2 flange portion (restriction surface)
47 fixing member 48 saddle 49 supporting member 49A fixing part 49A1, 49B1 screw hole 49B foot part 49C bending part 49D side edge part 58, 59 screw

Claims (3)

A pipe for transmitting vibration of the compressor when the compressor is driven, and a flat fixing member for fixing the pipe to a bottom plate on which the compressor is mounted,
one end of the fixing member holds the pipe,
The other end of the fixing member is fixed to the bottom plate ,
The bottom plate is provided with a reinforcing member having a flange portion that rises upward and constitutes a regulating surface,
The fixing member is fixed to the bottom plate via the reinforcing member,
The reinforcing member comprises a joint,
The flange portion is raised upward from both sides of the joint portion,
the other end of the fixing member is fixed to the connecting portion;
Both side edges located in the width direction, which is the direction intersecting the thickness direction of the fixing member, are in contact with the pair of flange portions provided on the bottom plate.
A piping fixing structure characterized by: The bottom plate is composed of a plurality of plate-like members,
The pipe fixing structure according to claim 1 , wherein the reinforcing member is a member that fixes the plurality of plate-like members to each other. An outdoor unit for an air conditioner, comprising the pipe fixing structure according to claim 1 or 2 .

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