JPS61279794A - Closed type compressor - Google Patents

Abstract

PURPOSE:To reduce noise from a compressor by providing a cylinder body with a discharge passage which penetrates into a communicating hole provided on the lower bearing end plate and opens on the upper bearing and plate side in the circumferential direction such that joining of the discharged gas derived from the upper and lower mufflers is avoided. CONSTITUTION:A lower muffler 17 is provided on the lower bearing end plate 11 of a cylinder body 9, and a communicating hole 20 is also provided on the lower bearing end plate 11 so as to lead the discharged gas within the lower muffler 17. While, the cylinder body 9 is provided with a communicating hole 21, which extends along direction of the axis from the point of agreement with said communicating hole 20, and a groove 23, which penetrates into the communicating hole 21 and opens on the upper bearing end plate 10 side in the circumferential direction. Thereby, the discharged gas within the upper muffler 16 on the upper bearing and plate 10 and the discharged gas within the lower muffler 17 can be introduced into a closed container 1 without joining each other, and the internal volume of the upper muffler 16 can also be increased, and accordingly, noise can be reduce considerably.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hermetic compressor used in an air conditioner.

BACKGROUND OF THE INVENTION In recent years, there has been a strong demand for low noise and low vibration of this type of hermetic compressor. Conventionally, this type of hermetic compressor had a structure as shown in FIG.

The conventional hermetic compressor mentioned above will be explained below with reference to the drawings.

MlgK Hey, Tech, Wow. , engineering, 11□, rotation, f371,5 electric. Machine, element. Yo, 2 degrees. machine,
; each compressor element 5 is arranged to be driven by the element 4 via a crankshaft 5. The compressor element 5 is integrated with the crankshaft 6 and is screwed together.
□Ton 7, cylinder body 9 forming a cylindrical cylinder 8 housing this piston 7, and this cylinder body 9.
□; Upper bearing end plate 1 that closes the openings at both ends of the adapter
0 and the lower bearing end plate 11.
,,′.

The bearing end plates 10, tUt, each form a pair.
,・(,:) Also serves as support for the rank axis 6.
:;・1.1 Also, the above-mentioned upper bearing end plate 10, both companies' lower bearing end plate 11
QV, Yu, 4! , 4□. 4,2, Engineering. □, 3, □i Opposed to this, an upper discharge valve 14 and a partial discharge valve 15 are provided, and an upper muffler 6 and a lower muffler -°'' are also provided. This upper muffler 17 is provided with a communication hole 19 corresponding to the communication hole 18 passing through the upper bearing 10 and the lower bearing 11 via the cylinder body 9, and the peripheral part of this communication hole 19 is It is in close contact with the upper bearing end plate 10.

Regarding the closed type pressure machine configured as above.

The effect will be explained below.

When the electric motor element 4 is operated, the refrigerant flows into the cylinder 8, is compressed as the piston 7 rotates, and when the pressure increases, it pushes open the upper discharge valve 14 and the lower discharge valve 16, and the upper discharge hole 12, The air is discharged from the lower discharge hole 13 into the upper muffler 16 and lower muffler 17, respectively. here,
The refrigerant discharged into the lower muffler 17 passes through the communication hole 18 and is discharged into the sealed container 1 through the communication hole 19 of the upper muffler 16 . Further, the refrigerant discharged into the upper muffler 16 is discharged into the closed container 1 through a hole (not shown) in the upper muffler 17.

Problems to be Solved by the Invention However, in the above-mentioned conventional II configuration, it is not easy to form the communication hole 19 of the upper muffler 16, and the communication hole 19 is difficult to form.
It is difficult to maintain good adhesion between the peripheral portion and the upper bearing end plate 10, which may result in chattering noise, increased noise due to the refrigerant that has passed through the communication hole 18 leaking into the upper muffler 16, and vibration. There was a problem with the increase. Furthermore, it is difficult to make the volume of the upper muffler 16 sufficiently large by bringing the peripheral portion of the communication hole 19 into close contact with the upper bearing end plate 10, resulting in a disadvantage that the map effect is reduced.

Therefore, the present invention eliminates the leakage of the refrigerant discharged from the lower discharge hole and passed through the communication hole into the upper muffler, and
The purpose is to make it possible to increase the volume of the upper map and to suppress noise and vibration.

Means for Solving the Problems In order to solve the above problems, the present invention provides a communication hole formed by a hole provided in the lower bearing end plate, a hole and groove provided in the cylinder body, and an end surface of the upper bearing end plate. This is what constitutes II.

Effect of the Invention With the above-described configuration, the present invention reliably prevents the refrigerant discharged from the lower discharge hole and the refrigerant discharged from the upper discharge hole from merging and mixing in the upper muffler. The volume of can be increased.

As a result, noise and vibration caused by the confluence and mixing of refrigerants in the upper muffler can be reduced.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

Components that are the same as those in the conventional example described above will be given the same numbers and will not be described further.

FIG. 2 is a longitudinal sectional view of a hermetic compressor showing one embodiment of the present invention, and FIG. 1 shows the main part of the present invention.

In the figure, a lower bearing communication hole 20 is provided in the lower bearing end plate 11, a cylinder communication hole 21 is provided in the cylinder body 8 coaxially with this lower bearing communication hole 20, and a cylinder body 8 that intersects with this cylinder communication hole 21 is provided. A groove 23 penetrating the outer periphery of the cylinder body 8 is provided in the upper end surface 22 of the cylinder body 8, and the lower bearing communication hole 20, the cylinder communication hole 21, the groove 2a, and the upper bearing end plate 9 constitute a communication hole.

The effects of the above configuration will be explained below.

When the electric motor element 4 is energized, the rotor 3 is driven, and the drive of the rotor 3 drives the piston 7 via the crankshaft 5, and as the piston 7 rotates, refrigerant is sucked into the cylinder 8. It is compressed and the pressure increases. As a result, the upper discharge valve 14 and the lower discharge valve 15 are pushed open, and the discharge is discharged from the upper discharge hole 12 into the upper muffler 16 and from the lower discharge hole 13 into the lower muffler 17, respectively. Here, the refrigerant discharged into the lower muffler 17 flows through the lower bearing communication hole 20,
It is discharged laterally within the closed container 1 through a communication hole formed by the cylinder communication hole 21, the groove 23, and the upper bearing end plate 10. Further, the refrigerant discharged into the upper muffler 16 is discharged upward into the sealed container 1 through the hole 24 provided in the upper muffler t7.

In this way, it is possible to completely cut off the mixing of the refrigerant discharged from the lower discharge hole 13 and the refrigerant discharged from the upper discharge hole 12 in the upper muffler 17, and the upper muffler 1
It is possible to more reliably prevent the occurrence of noise and vibration caused by the merging and mixing of refrigerants in the refrigerant. Further, since the upper muffler 17 does not need to be formed, the volume of the upper muffler 17 can be increased compared to the conventional example, and the muffler effect can be increased.

Effects of the Invention As described above, the present invention provides a lower bearing communication hole in the lower bearing end plate, a cylinder communication hole in the cylinder body, and an outer periphery of the cylinder body on the upper end surface of the cylinder body that intersects with the cylinder communication hole. By providing a groove that penetrates the surface and forming a communication hole with the lower bearing communication hole, round adder communication hole, groove, and upper bearing end plate, the refrigerant from the lower discharge hole in the upper muffler and the upper discharge are connected. It is possible to completely cut off the merging and mixing of refrigerants from the holes, and it is possible to more reliably prevent the generation of noise and vibration caused by the merging and mixing of these refrigerants.

In addition, it is possible to increase the volume of the upper muffler,
This has the excellent effect of increasing the muffler effect.

[Brief explanation of the drawing]

It is. 1... Airtight container, 4... Electric motor element,
6... Compressor element, 9... Cylinder body, 10... Upper bearing end plate, 11... Lower bearing end plate, 12... ...Top discharge hole, 13...
...Lower discharge hole, 20...Lower bearing communication hole, 21
......Cylinder communication hole, 22...Top end surface, 23...Groove. Name of agent: Patent attorney Toshio Nakao and 1 other person22
...Top end surface 23...Groove

Claims (1)

[Claims] An electric motor element and a compressor element driven by the electric motor element are respectively disposed in a sealed container, and refrigerant compressed by the compressor element is discharged to upper and lower bearing end plates constituting the compressor element. In a hermetic compressor having an upper discharge hole and a lower discharge hole, respectively, a lower bearing communication hole is provided in the lower bearing end plate, and a lower bearing communication hole is provided in the cylinder body at a position corresponding to the lower bearing communication hole in the axial direction of the cylinder body. A hermetic compressor, wherein a cylinder communication hole is provided, and a groove penetrating the outer peripheral surface of the cylinder body is provided on an upper end surface of the cylinder body that intersects with the cylinder communication hole.