JP2020020489A - Pipe fixing structure, and outdoor unit of air conditioning device - Google Patents

Abstract

To provide a pipe fixing structure that has a simple configuration and can relax stress generated in a pipe.SOLUTION: A pipe fixing structure comprises an outlet side pipe 36 to which vibration of respective compressors 12 and 14 is transmitted when the respective compressors 12 and 14 are driven, and a tabular fixing member 47 for fixing the outlet side pipe 36 to a bottom plate 4 on which the respective compressors 12 and 14 are placed. A saddle 48 comprised in the fixing member 47 holds the outlet side pipe 36. A foot part 49B of a supporting member 49 comprised in the fixing member 47 is fixed to the bottom plate 4. At least one side edge part 49D in a width direction of the fixing member 47 is in contact with a flange part 46A2 provided on the bottom plate 4.SELECTED DRAWING: Figure 5

Description

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

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

JP 2017-101714 A

However, when fixing a pipe having a large outer diameter to the bottom plate of the outdoor unit, it is necessary to increase the size of the fixing member or to provide a flange in order to provide the fixing member with sufficient rigidity, thereby increasing costs. There was something to do.
An object of the present invention is to provide a pipe fixing structure that can relieve stress generated in a pipe with a simple configuration.

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

  According to this, the fixing member is reinforced by the groove, and the vibration of the pipe is suppressed by the fixing member having a simple configuration.

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

The perspective view which shows the outline of the state which removed the cover member of the outdoor unit of the air conditioner which concerns on embodiment of this invention. A perspective view showing the internal structure of the outdoor unit. The figure which shows the structure of the piping connected to each compressor and each 2nd accumulator Side view showing the configuration of the lower part of the first accumulator Perspective view showing the configuration of the fixing part of the outlet pipe A perspective view showing a configuration of a fixing member.

The first invention includes a pipe through which vibration of the compressor is transmitted 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 a regulating surface provided on the bottom plate. It is a pipe fixing structure.
According to this, the side edge of the fixing member is supported by the regulating surface. Therefore, the rigidity of the fixing member against vibration in the width direction can be increased without providing a flange portion or the like on the fixing member, and the vibration of the pipe can be suppressed with a simple structure.

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

According to a third aspect of the present invention, the fixing member is fixed to the bottom plate via a reinforcing member, the reinforcing member includes a joint, and the flanges are raised upward from both sides of the joint. Is fixed to the coupling portion, and both side edges of the fixing member are in contact with a pair of flange portions, respectively.
According to this, the fixing member is supported by the pair of flange portions on both sides in the width direction. Therefore, the rigidity of the fixing member against vibration in the width direction can be increased without providing a flange portion or the like on the fixing member.

A fourth invention is a piping fixing structure, wherein the bottom plate is formed of a plurality of plate members, and the reinforcing member is a member for fixing the plurality of plate members to each other.
According to this, the reinforcing member is a member that prevents the bottom plate from bending when the outdoor unit is transported, and the reinforcing member reinforces the bottom plate. Since the fixing member is reinforced by using the reinforcing member, the vibration of the pipe can be suppressed with a simple structure.

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

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view schematically showing a state where 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 an internal structure of the outdoor unit 1. .
The outdoor unit 1 of the present embodiment is used for a refrigeration cycle of an air conditioner. As shown in FIG. 1, the outdoor unit 1 includes a housing 2, and the housing 2 includes a pair of base frames 3 that support a lower portion of the housing 2. The base frames 3 are installed on opposing sides of the housing 2.
One side, which is the front of the housing 2 shown in FIG. 1, is covered with a cover member, not shown.
A bottom plate 4 is attached to a lower portion of the housing 2, and a top plate 5 is attached to an upper portion of the housing 2. The top plate 5 has a lattice-shaped exhaust port 6 formed therein.
A wooden frame 7 having a predetermined height is provided below the outdoor unit 1 along the outer shape of the housing 2.

The inside of the housing 2 is divided into a heat exchange room 8 and a machine room 9.
The heat exchange chamber 8 is provided above the inside of the housing 2 and includes a heat exchanger (not shown), a blower fan 10, and an electrical box 11.
The 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 drives the blower fan 10 to rotate, thereby taking in air from the side of the housing 2 and passing the air after heat exchange through a heat exchanger (not shown) to the upper exhaust port 6. It is a so-called top-flow type outdoor unit that discharges from the roof.
The electrical 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 below the inside of the housing 2. In the present 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, and the like. By connecting these with each refrigerant pipe, a refrigeration cycle circuit of the air conditioner is configured.

FIG. 3 is a diagram showing a configuration of a pipe connected to each of the compressors 12 and 14 and each of the second accumulators 18 and 20. In FIG. 3, the compressors 12 and 14 and the second accumulators 18 and 20 are omitted. FIG. 4 is a side view showing the configuration of the lower part of the first accumulator 16. In FIG. 4, one foot 44 of the first accumulator 16 is omitted.
Each compressor 12, 14 is mounted on the bottom plate 4 adjacent to each other. Each of the compressors 12 and 14 compresses and discharges the refrigerant, and circulates the refrigerant in the refrigeration cycle. Each compressor 12, 14 is connected in parallel in the refrigeration cycle circuit.

One end of a suction pipe (not shown) for supplying a refrigerant to the compressors 12 and 14 is connected to a suction side of each of the compressors 12 and 14, respectively, and these suction pipes are respectively connected to a second accumulator on the upstream side. 18 and 20 are connected.
One end of a pair of first discharge pipes 28, 30 through which the compressed refrigerant flows is connected to the discharge side of each of the compressors 12, 14, and these first discharge pipes 28, 30 are, as shown in FIG. They merge at 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 above-described heat exchanger is connected to the second discharge pipe 32 via a capillary tube 34, a receiver tank (not shown), and the like.
In the present embodiment, the outer diameter of the suction pipe connected to each of 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 a gas refrigerant and a liquid refrigerant, and the first accumulator 16 is formed in a vertically elongated 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 a refrigerant to the first accumulator 16, and the other end of the 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 pipe 36 has one end connected to the first accumulator 16, a parallel portion 36 </ b> A extending substantially parallel to the bottom plate 4, a rising portion 36 </ b> B rising upward from the other end of the parallel portion 36 </ b> A, and a rising portion 36 </ b> B. And a branch portion 38 to which the portion 36B is connected.
The parallel portion 36 </ b> A extends along the bottom plate 4 from the first accumulator 16 toward the two compressors 12 and 14, and is a portion of the outlet pipe 36 closest to the bottom plate 4.

A pair of branch pipes 40 and 42 are connected to the other end of the branch part 38 to which the rising part 36B is connected. Each branch pipe 40, 42 is connected to two second accumulators 18, 20 smaller than the first accumulator 16, respectively. The second accumulators 18 and 20 of the present embodiment are gas-liquid separators for separating again the liquid component of the refrigerant that cannot be separated by the first accumulator 16.
In the present embodiment, the outer diameters of the parallel portion 36A and the rising portion 36B of the outlet-side pipe 36 are larger than the outer diameters of the branch pipes 40 and 42.

The bottom (lower part) of the first accumulator 16 is an oil reservoir 16A for storing oil separated from a gaseous refrigerant and a liquid component of the refrigerant. An oil return circuit 50 is provided at the bottom of the first accumulator 16.
The oil return circuit 50 includes an oil return pipe 52 and a solenoid 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 16 </ b> A of the first accumulator 16 and the outlet pipe 36. Further, a strainer 56 is provided at an intermediate position of the oil return pipe 52.

The electromagnetic valve 54 is provided between the bottom of the first accumulator 16 and the strainer 56 in the oil return pipe 52, and opens and closes the flow path of the oil return pipe 52 by opening and closing the electromagnetic valve 54. I have. The solenoid valve 54 is fixed to one of a pair of feet 44 supporting the first accumulator 16 with screws.
When the electromagnetic valve 54 is released and the flow path of the oil return pipe 52 is opened, the oil and the refrigerant stored in the oil pool 16A are introduced into the outlet pipe 36.
The oil returned by the oil return pipe to the outlet pipe 36 and the liquid component of the refrigerant may be small, and the oil return pipe 52 has a smaller diameter than the outer diameter of the refrigerant pipe such as the inlet pipe or the outlet pipe 36. The one with a small outer diameter is used.
The oil return circuit 50 of the present embodiment is located on the side of the parallel portion 36A when viewed from the direction in which the parallel portion 36A of the outlet pipe 36 extends. The oil return circuit 50 is located between the first accumulator 16 and the rising portion 36B.

  The four-way valve 24 is switched so that the inlet pipe and the second discharge pipe 32 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 described.
The bottom plate 4 of the present embodiment is provided by a plurality of plate-like members 45 being stretched over a pair of base frames 3. These plate 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 of the reinforcing members 46A and 46B is formed by bending a sheet metal so as to have a U-shaped cross section. Each of the reinforcing members 46A, 46B includes contact portions 46A1, 46B1 that contact the plate members 45A, 45B, and a pair of flange portions 46A2, 46B2 extending upward from both ends in the short direction of the contact portions 46A1, 46B1. (Regulatory aspect). Each of the reinforcing members 46A and 46B is arranged so that the longitudinal direction thereof is along the shorter direction of the plate members 45A and 45B, and is fixed to the plate members 45A and 45B at two positions at both ends.

Thus, when the outdoor unit 1 of the air conditioner is transported, it is possible to prevent the plate-shaped members from being twisted due to the vibration accompanying the transport, and it is possible to secure the strength of the bottom plate 4.
In addition, a groove 4C that is recessed downward is provided at a position located between the plate-like member 45A and the plate-like member 45B. The groove 4C has a predetermined width and extends along the longitudinal direction of the plate members 45A and 45B.

Further, the compressors 12, 14 and the first accumulator 16 are both heavy in weight, and further, these compressors 12, 14 and the first accumulator 16 have relatively large outer diameters in the refrigerant pipe, They are connected by heavy pipes. Thereby, the weight is easily concentrated on the bottom plate 4 between the two compressors 12 and 14 and between the compressors 12 and 14 and the first accumulator 16. For this reason, the reinforcing member 46A is arranged so as to be located between the two compressors 12, 14 and between these compressors 12, 14 and the first accumulator 16, as shown in FIGS. Have been.
The reinforcing member 46A of the present embodiment extends so that the longitudinal direction is substantially parallel to the direction in which the parallel portion 36A of the outlet pipe 36 extends.

Next, the fixing structure of the outlet pipe 36 will be described.
FIG. 5 is a perspective view showing a fixing structure of the outlet side pipe 36, and FIG. 6 is a perspective view showing a configuration of the support member 49.
As shown in FIG. 5, the outlet pipe 36 is fixed to the bottom plate 4 by a fixing member 47, specifically, to a reinforcing member 46 </ b> A provided on the bottom plate 4.
The fixing member 47 includes 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 position near the parallel portion 36A of the rising portion 36B. Thus, the fixing member 47 can fix the outlet side pipe 36 at a position close to the bottom plate 4, and it is possible to prevent the longitudinal direction of the support member 49 described later from becoming longer.
In addition, the fixing member 47 of the present embodiment fixes the outlet-side pipe 36 at a position near the parallel portion 36A of the rising portion 36B in order to improve workability in fixing or replacing the pipe. However, the invention is not limited thereto, and the fixing member 47 may fix the outlet-side pipe 36 with the parallel portion 36A closer to the bottom plate 4.

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

The foot portion 49B is provided by being bent in the thickness direction of the support member 49 along the width direction of the support member 49, and is inserted between a pair of flange portions 46A2 of the reinforcing member 46A. . The foot part 49B has two screw holes 49B1, and is fixed to the contact part 46A1 of the reinforcing member 46A by two screws 59 inserted into these screw holes 49B1.
In the present embodiment, the portion where the foot portion 49B of the contact portion 46A1 is fixed is a portion that extends over the groove 4C. For this reason, the two screw holes through which the two screws 59 are inserted on the side of the bottom plate 4 are not provided on the bottom plate 4 but are provided only on the contact portion 46A1 of the reinforcing member 46A.
The side edges 49D on both sides in the width direction of the support member 49 are in contact with the pair of flanges 46A2, respectively. That is, the support member 49 is supported on both sides in the width direction by the flange portions 46A2.

The bent portion 49C is located between the fixing portion 49A and the foot portion 49B, and is inclined when viewed from the side edge portion 49D. More specifically, in the bent portion 49C, the end on the foot 49B side is farther from the oil return pipe 52 than the end on the fixed portion 49A side.
By providing the bent portion 49C, the support member 49 can be provided without making contact with the oil return pipe 52. 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.
When the support member 49 does not contact the oil return pipe 52 or another refrigerant pipe depending on the pipe layout, the bent portion 49C may not be provided.

Next, the operation of the present embodiment will be described.
In the case of the heating operation of the air conditioner, when the outdoor unit 1 starts operating, the compressors 12 and 14 are driven. Each of the compressors 12 and 14 includes a first accumulator 16, second accumulators 18 and 20, a capillary tube 34, an indoor heat exchanger (not shown), a heat exchanger (not shown) provided in the outdoor unit 1, and refrigerant pipes and the like. The refrigerant enclosed in the refrigeration cycle is compressed, and the refrigerant is sent out through each refrigerant pipe.
After releasing the heat in the indoor heat exchanger, the refrigerant flows into the expansion valve through the pipe, is decompressed by the expansion valve, and further 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. The blower fan 10 that is rotationally driven sends air to the exhaust port 6 from below the outdoor unit 1.
The delivered air 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 air is condensed. Thereafter, the refrigerant flows out of the heat exchanger, flows into the compressors 12 and 14 through the pipes, and is compressed again.
On the other hand, the air that has exchanged heat with the refrigerant is discharged from the exhaust port 6 to the outside of the housing 2 by the blower fan 10.
By repeating this operation, the outdoor unit 1 absorbs heat from the outdoor air into the refrigeration cycle and discharges the heat indoors.
In the cooling operation of the air conditioner, the direction of circulation 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 the vibrations propagate to the refrigerant pipes and other devices included in the outdoor unit 1.
Among these refrigerant pipes, the outlet pipe 36 has a relatively short length and the largest outer diameter, so that the propagated vibration is hardly attenuated and vibrates with a strong force.
In the present embodiment, the outlet side pipe 36 is fixed to the bottom plate 4 by a fixing member 47 at a position where the outlet side pipe 36 approaches the bottom plate 4. More specifically, the fixing member 47 fixes the outlet side pipe 36 to the bottom plate 4 via the reinforcing member 46A.
Accordingly, the entire length of the support member 49 included in the fixing member 47 does not become unnecessarily long, and a decrease in rigidity can be suppressed.
The foot 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 the respective flanges 46A2.
Accordingly, when the outlet side pipe 36 vibrates, the vibration in the width direction of the support member 49 is suppressed by the respective side edges 49D of the support member 49 abutting the respective flange portions 46A2. That is, each of the flange portions 46A2 functions as a regulating surface of the fixing member 47, and the vibration of the fixing member 47 along the width direction 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.
For this reason, it is not necessary to introduce a new member, or to provide a flange portion or the like on the support member 49 of the fixing member 47, and without changing the layout of each refrigerant pipe, the vibration of the outlet side pipe 36 with a simple structure. Can be suppressed.

According to the above-described embodiment, the following effects can be obtained.
In the present embodiment, the outdoor unit 1 includes the outlet pipe 36 and a fixing member 47 for fixing the outlet pipe 36 to the bottom plate 4. The saddle 48 of the fixing member 47 holds the outlet pipe 36, and the foot 49B of the support member 49 of the fixing member 47 is fixed to the contact portion 46A1 of the reinforcing member 46A provided on the bottom plate 4. The 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.
Thus, the support member 49 of the fixing member 47 is supported on both sides in the width direction by the respective flange portions 46A2. Therefore, the rigidity of the fixing member 47 against vibration of the outlet pipe 36 in the width direction can be increased without providing a flange portion or the like, and the vibration of the outlet pipe 36 can be suppressed with a simple configuration. it can.

  In the present embodiment, the bottom plate 4 is composed of a plurality of plate members, and the reinforcing member 46A is a member that fixes the plate members 45A and 45B to each other. Thus, the fixing member 47 can be reinforced by using the existing reinforcing member 46A. For this reason, it is not necessary to introduce a new member or to 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 with reduced cost.

  The above-described embodiment exemplifies one embodiment of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

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

  Further, for example, the outdoor unit 1 of the present embodiment includes the two compressors 12 and 14, but is not limited thereto, and may include three or only one compressor.

Reference Signs List 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 pipe 36A parallel part 36B rising part 38 branch part 40, 42 Branch piping 45, 45A, 45B Plate-shaped member 46, 46A, 46B Reinforcement member 46A1, 46B1 Contact part 46A2, 46B2 Flange part (regulation surface)
47 Fixing member 48 Saddle 49 Supporting member 49A Fixing portion 49A1, 49B1 Screw hole 49B Foot 49C Bending portion 49D Side edge 58, 59 Screw

Claims (5)

A pipe through which vibration of the compressor is transmitted 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 a bottom plate,
A piping fixing structure, wherein at least one side edge in the width direction of the fixing member is in contact with a regulating surface provided on the bottom plate. The bottom plate is provided with a reinforcing member having a flange portion that is raised upward and constitutes the regulation surface,
The piping fixing structure according to claim 1, wherein at least one side edge in the width direction of the fixing member is in contact with the flange portion. The fixing member is fixed to the bottom plate via the reinforcing member,
The reinforcing member includes a joint,
The flange portion is raised upward from both sides of the coupling portion,
The other end of the fixing member is fixed to the coupling portion,
The piping fixing structure according to claim 2, wherein both side edge portions of the fixing member are in contact with the pair of flange portions, respectively. The bottom plate is composed of a plurality of plate members,
The pipe fixing structure according to claim 2, wherein the reinforcing member is a member that fixes the plurality of plate-shaped members to each other. An outdoor unit for an air conditioner, comprising the pipe fixing structure according to claim 1.

Images