JP2003065239A - Hermetic compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hermetic compressor comprising a leg body that relaxes impact force on a hermetic container by dispersing stress onto the leg body without concentration when falling and that resists impact force by minimizing deformation of the leg body. SOLUTION: On a lower part of the hermetic container, fixing parts 6d having a plurality of inserting holes 6e punched on the periphery are extended and the plate type leg body 6 comprising a flange 6a having a part between the fixing parts 6d adjoining each other folded downward is fixed. This compressor is formed by a circular arc 6f of which the outer periphery between the adjoining fixing parts is curved inside and a tangent 6g of which ends of the circular arc 6f are extended toward tips of the fixing parts 6d.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic compressor, and more particularly, to a structure of legs capable of absorbing impact force when the hermetic compressor falls.

[0002]

2. Description of the Related Art A conventional hermetic compressor includes, for example, as shown in FIGS. 5 and 6, an electric motor 2 in a hermetic container 1, a compression section including a main frame 3, a fixed scroll 4 and an orbiting scroll 5. Is provided, the refrigerant gas introduced from the outside is compressed by the compression unit, and is discharged again to the outside. A plate-shaped leg body 30 having a flange 30a formed by bending a peripheral edge downward is joined and fixed to a hemispherical bottom shell 1a forming a lower portion of the closed container 1 by welding 1b.

As shown in the top view of FIG. 6, the leg body 30 has an attachment portion in which a circular joint hole 30c to which the bottom shell 1a is joined is bored in the center and a screw insertion hole 30e is bored. The projections 30d are provided in four directions, and flanges 30a bent downward are provided at the peripheral edges between the attachment portions 30d adjacent to each other. The hermetic compressor described above, for example, when incorporated in the outdoor unit of the air conditioner,
A drop test is conducted assuming a drop accident in each case.

However, when the hermetic compressor is dropped by itself, the leg 30 has the following structure as shown in E of FIG.
Since the outer edge is formed in a square shape, stress concentrates there, and the impact force cannot be sufficiently absorbed, so that the electric motor 2 or the orbiting scroll 5 housed in the closed container 1 can be prevented.
There is a need for a hermetic compressor having legs that may be damaged or the like, and the legs 30 themselves may be deformed to absorb the impact force, while being less likely to be deformed.

[0005]

SUMMARY OF THE INVENTION In view of the above problems, the present invention reduces the concentration of stress in the legs when they are dropped, reduces the impact force on the closed container, and minimizes the deformation of the legs. It is an object of the present invention to provide a hermetic compressor having a leg body that is capable of moving and is resistant to impact force.

[0006]

In order to solve the above-mentioned problems, the present invention is provided with a mounting portion having a plurality of insertion holes formed in the peripheral portion at the lower portion of a hermetically sealed container, and the peripheral portions between the mounting portions adjacent to each other A plate-shaped leg body having flanges that are bent downward, respectively, wherein the outer edge between the mounting portions is curved inward, and the mounting is performed from the end of the circular arc. And a tangent line extending toward the tip of the section.

The flange is bent so that the bending angle is an obtuse angle.

The vertical length of the flange is
The thickness is set to be 3 to 5 times the plate thickness of the legs.

Further, the tip end surface of the mounting portion is perpendicular to a straight line connecting the center of the leg and the centers of the plurality of insertion holes.

Further, a flange is not provided on the tip surface of the mounting portion.

Further, the lower side end portion of the flange is formed in an R shape.

The leg and the bottom shell of the closed container are integrally formed.

Further, the leg body is formed of elastic spring steel.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail as examples based on the accompanying drawings. FIG. 1 is a sectional view showing a hermetic compressor according to the present invention, and FIG. 2 is a top view showing legs provided in the hermetic compressor.
3A is a view as seen from an arrow A in FIG. 2, and FIG. 3B is a view as seen from an arrow C in FIG. FIG. 4 is experimental data showing the degree of deformation of the leg when the length (A) of the flange of the leg and the bending angle (B) are changed. As shown in FIG. 1, the hermetic compressor according to the present invention comprises a hermetic container 1 and a leg body 6 fixed to a lower portion of the hermetic container 1. In the closed container 1, an electric motor 2, a main frame 3,
A compression unit and the like composed of the fixed scroll 4 and the orbiting scroll 5 are housed, and the compression unit compresses the refrigerant gas introduced from the outside and guides it to the outside again.

The leg 6 is joined to the hemispherical bottom shell 1a constituting the lower part of the closed container 1 by welding 1b. The leg 6 is as shown in the top view of FIG. 2 and the side view of FIG. In addition, a circular joint hole 6c to which the bottom shell 1a is joined is drilled in the central portion, and mounting portions 6d having screw insertion holes 6e are projecting in four directions, and between the mounting portions 6d adjacent to each other. A flange 6a bent downward is provided on each of the peripheral edges of the. The outer edge between the mounting portions 6d is configured to include an arc 6f that curves inward, and a tangent line 6g that extends the end of the arc 6f toward the tip of the mounting portion 6d. The flange 6a is bent in the range of 150 to 180 degrees where the bending angle θ is an obtuse angle, and the vertical length d thereof is 3 to 5 times the plate thickness t of the leg body 6. Is set to.

Next, the leg 6 will be described based on experimental data. The experimental data shown in FIG.
At the time of the drop test with the above hermetic compressor alone, with respect to the vertical length d (flange length) of the flange 6a,
The vertical displacement of the flange 6a and the stress applied to the leg 6 are shown, and the experimental data shown in FIG. 4 (B) is based on the bending angle θ of the flange 6a with respect to the vertical direction of the flange 6a. And the stress applied to the leg body 6 are shown. The plate thickness t of the flange 6a is 3.6 mm.
Is set to. As shown in FIG. 4 (A), when the flange length d is 15 mm and a drop test is performed, the displacement of the flange 6a is about 0.13 mm and the stress is about 2 as well.
The minimum value is 0 MPa (megapascal). Further, as shown in FIG. 4 (B), the flange 6a
When the bending angle θ is about 160 degrees, the displacement is about 0.1
It is 3 mm, and the stress also shows the smallest value of about 21 MPa.

The tip surface 6h of the mounting portion 6d has a center 0 of the leg 6 and a center 0'of the plurality of screw insertion holes 6e.
The straight line B connecting the
By forming the lower part of the side end 6i of a into an R shape, it is effective because the leg body 6 does not have a corner when a local impact is received such as when the falling posture of the hermetic compressor is tilted. Target.

Further, since the front end surface 6h of the mounting portion 6d is not provided with the flange 6a, the work of mounting the rubber feet can be easily performed. Further, by pressing the central portion of the leg body 6 into a dish shape and integrally molding the leg body 6 and the bottom shell 1a, welding work can be reduced, which is advantageous in terms of cost. Further, by forming the leg body 6 from elastic spring steel, it is possible to further reduce the impact force and reduce the deformation.

As described above, the outer edge between the mounting portions 6d is an inwardly curved arc 6f, and the tangent line 6g is formed by extending the end of the arc 6f toward the tip of the mounting portion 6d.
And the flange 6a is bent in the range of 150 to 180 degrees where the bending angle θ is an obtuse angle, and its vertical length d is the plate thickness t of the leg body 6.
When the hermetic compressor is dropped by itself, the stress is concentrated without being concentrated as shown in the conventional example, so that the impact force on the hermetic container 1 is mitigated. In addition, the deformation of the legs 6 can be minimized, and the hermetic compressor can be made resistant to impact force.

[0020]

As described above, according to the present invention,
The flange that forms the leg fixed to the lower part of the closed container has an arc that curves inward and a tangent line that extends the end of the arc toward the tip of the mounting part. Is 3 to 5 times the plate thickness of the legs and the bending angle is an obtuse angle so that stress is dispersed without concentration, so that a hermetic compressor that is resistant to impact force can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a hermetic compressor according to the present invention.

FIG. 2 is a top view showing a leg provided in the hermetic compressor according to the present invention.

FIG. 3 (A) is a view taken in the direction of arrow A in FIG.
(B) is a C arrow view of FIG.

FIGS. 4A to 4B are experimental data showing data obtained by a drop test.

FIG. 5 is a sectional view showing a hermetic compressor according to a conventional example.

FIG. 6 is a top view showing a leg provided in a hermetic compressor according to a conventional example.

[Explanation of symbols]

1 closed container 2 electric motor 3 mainframe 4 fixed scroll 5 orbiting scroll 6 legs 6a flange 6c joint hole 6d mounting part 6e Screw insertion hole 6f arc 6g tangent 6h Tip surface

Claims (8)

[Claims] 1. A plate-like member provided with a mounting portion having a plurality of insertion holes formed in its peripheral portion at a lower portion of the hermetic container, and a flange bent downward at each peripheral portion between the mounting portions adjacent to each other. Of the above, wherein the outer edge between the mounting portions is constituted by an arc curved inward and a tangent line extending from the end of the arc toward the tip of the mounting portion. A hermetic compressor characterized in that 2. The hermetic compressor according to claim 1, wherein the flange is bent such that the bending angle of the flange is an obtuse angle. 3. The hermetic compressor according to claim 1, wherein the vertical length of the flange is set to be 3 to 5 times the plate thickness of the leg body. 4. The hermetic compressor according to claim 1, wherein a tip end surface of the mounting portion is perpendicular to a straight line connecting a center of the leg and a center of the plurality of insertion holes. 5. The hermetic compressor according to claim 1, wherein a flange is not provided on the tip surface of the mounting portion. 6. The hermetic compressor according to claim 1, wherein a lower side end portion of the flange is formed in an R shape. 7. The hermetic compressor according to claim 1, wherein the leg and the bottom shell of the hermetic container are integrally molded. 8. The hermetic compressor according to claim 1, wherein the legs are made of elastic spring steel.