JPS6166888A - Discharge flow passage apparatus of sealed type compressor - Google Patents

Abstract

PURPOSE:To prevent the generation of vibration and noise due to the confluence of discharged gas by connecting the lower discharge chamber of a compression mechanism part to a communication pipe communicating to the upper part in a sealed container through the outside of the sealed container, thus avoiding the confluence of the gas discharged from the upper and lower discharge chamber. CONSTITUTION:Discharge chambers 12a and 12b are formed onto the upper and lower edge plates 8 and 9 of a compression mechanism part accommodated into a sealed container 2, and discharge holes 10a and 10b for introducing the gas discharged from the operation chambers communicate to he discharge chambers. Though the gas supplied from the upper discharge chamber is directly sent into a sealed container, the gas discharged from the lower discharge chamber is sent into the sealed container through a communication passage 16 communicating to the upper part in the sealed container through the outside of the sealed container. Therefore, the confluence of the gas discharged from the upper and lower discharge chambers is prevented, and the vibration and noise due to said confluence can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a sound-proofing and vibration-proofing structure in a compressor and to improving the cooling effect.

Structure of a conventional example and its problems Fig. 2 shows a cross section of a conventional hermetic compressor. 1 shows a stator press-fitted into the inner wall of a hermetic container 2, and a shaft 4 into which a rotor 3iC is press-fitted. At the bottom, there is a cylinder inner chamber 6 that houses a piston 5 that moves together with the cylinder.
The cylinder frame 7, the upper end plate 8, and the lower end plate 9 form an airtight compressor section.

In addition, the upper end plate 8 and the lower end plate 9 each have an upper discharge hole 1.
0a, a lower discharge hole 10b, and an upper discharge valve 11 opposite thereto.
a, there is a lower discharge valve 11b, and an upper muffler 12a1
A lower muffler 12b is provided.

The refrigerant sucked in with this configuration is compressed in the cylinder inner chamber 6 by the compression action of the piston 5, and is pushed open from the upper discharge hole 10a and the lower discharge hole 10b to the upper discharge valve 11a and the lower discharge valve t1bl, respectively, to the upper muffler. 12a1 Lower Mapura 1
Enter 2b.

Here, the refrigerant discharged from below passes through the communication hole 13,
The refrigerant discharged from above joins in the upper muffler 12a,
From here, it is ejected into the tank interior 14, passes through the refrigerant passage of the electric motor section, and is guided to the outside of the closed tank 2 through the discharge pipe 15.

At this time, the upper volume valve 11a1 and the lower discharge valve 11b are opened, and the refrigerant spouted from the upper outlet hole 10a and the upper outlet hole jOb is
Since a mixed turbulent flow occurs within the upper muffler 11a, the mixed turbulent noise and discharge resistance become large, and the discharged gas is overcompressed, resulting in a decrease in performance. Furthermore, during liquid compression, extremely high-pressure liquid is discharged into the lower muffler 12b, so there is a risk that the lower muffler 12b may be damaged.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems, and the structure of the compressor avoids the merging of the upper discharge passage and the lower discharge passage.
The purpose is to increase the discharge refrigerant temperature.

Structure of the Invention In order to achieve this object, the present invention closes the communication hole of the compressor, provides the lower muffler with a U-shaped tail pipe, and furthermore, provides a portion of the tail pipe outside the closed tank. It is something.

With this configuration, the upper discharge flow path and the lower discharge flow path are independent from each other, eliminating mixing turbulence and overcompression. Furthermore, by placing the lower discharge flow path outside the sealed tank,
It is possible to prevent the discharge refrigerant temperature from rising.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. Incidentally, the same members as those of the conventional one described above are indicated by the same reference numerals, and the explanation thereof will be omitted.

In FIG. 1, the communication hole 13 is closed, the upper outlet hole 10b located in the lower bearing 9 is used as an artificial hole, and the upper outlet hole 10b
A lower muffler 12b is provided on the lower bearing 9, and the lower muffler 12b includes the upper outlet hole 10b and forms a silencing chamber.
A tail pipe 16 serving as an outlet flow path is provided at 2b, and this tail pipe 16 is once taken out of the closed tank 2 and then put back into the closed tank. At this time, the opening should be located at the upper end of the cylinder frame 7 [iK above a certain oil level, so as not to contact the stator coils.

In the above configuration, the refrigerant sucked into the cylinder inner chamber 6
is compressed by the compression action of the piston 5, and pushes open the upper volume valve 11a and the lower discharge valve 11b from the upper outlet hole 10a and the upper outlet hole 10b, respectively, to open the upper muffler 12a1 lower 77u1.
2 Into b: enter.

Here, the refrigerant discharged from the upper outlet hole 10b into the lower muffler 12 by pushing open the lower discharge valve 11b passes through the tail pipe 16 and is ejected into the tank interior chamber 14.

Furthermore, the upper volume valve 11a is pushed open from the upper outlet hole 10a, and the refrigerant discharged into the upper muffler 12a is discharged from the upper muffler 12a.
It is ejected from a hole (not shown) provided in 2a.

Then, both are connected to the discharge pipe 1 through the refrigerant passage of the electric motor section.
5 to the outside of the closed container 2.

In this way, by making the upper discharge flow path and the lower discharge flow path independent, it is possible to prevent the phenomenon in which the upper 8 flows and the lower discharge flow become mixed turbulent flow as in the conventional case, and the vibration caused by this can be prevented. Since no noise is generated and the discharge resistance is small, performance deterioration due to overcompression can be prevented.

Furthermore, by taking the tail pipe 16 out of the sealed tank 2,
Prevents discharge refrigerant temperature from rising, eliminating motor seizure.

Effects of the Invention As described above, the present invention prevents mixed turbulent flow by making the upper outlet flow path and the lower discharge flow path independent, and further eliminates the vibration and noise caused by the flow, and further reduces the discharge resistance. It is possible to prevent performance deterioration due to overcompression. Furthermore, by once exposing the lower discharge flow path to the outside of the sealed tank, temperature rise at the discharge end g can be prevented and motor seizure will be eliminated.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a hermetic compressor showing an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a conventional hermetic compressor. 2...Tight container, 7...Cylinder frame, 8...Upper end plate, 9...
Lower end plate, 10a... Upper exit hole, 10b...
...Upper outlet hole, 11a...Upper volume valve, 11b
...Lower discharge valve, 12a...Upper muffler, 12b...Lower muffler, 13...Communication hole. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] A cylinder main body is constituted by a cylinder having a cylindrical space, an upper end plate and a lower end plate that close the ends of the cylinder, and a discharge hole is arranged in each of the upper end plate and the lower end plate, and further,
A hermetic compressor is configured by providing an upper discharge chamber and a lower discharge chamber made of a muffler shell, which constitute the both end plates and the discharge muffler, and further, one end opens into the lower discharge chamber,
A discharge passage device for a hermetic compressor, which is provided with a discharge communication pipe that penetrates a hermetic container and exits to the outside, and whose other end opens into the space above the compressor section.