JPH0330720B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to improvements in soundproofing devices for compressors.

Configuration of a conventional example and its problems The configuration of a conventional hermetic compressor will be explained with reference to FIG.

In the figure, 1 is a stator press-fitted into the inner wall of a closed container 2, and at the bottom of a shaft 4 press-fitted into a rotor 3, there is a piston 5 that moves together with the stator, and a cylinder housing this piston 5. A compressor section consisting of an inner chamber 6, a cylinder frame 7, an upper end plate 8, and a lower end plate 9 is formed. Further, the upper end plate 8 and the lower end plate 9 are provided with an upper discharge hole 10a and a lower discharge hole 10b, respectively, and an upper discharge valve 11a and a lower discharge valve 11b opposite thereto, and an upper muffler 12a. , 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 discharged through the upper discharge hole 10a and the lower discharge hole 1, respectively.
0b, push open the upper discharge valve 11a and the lower discharge valve 11b, and open the upper muffler 12a and the lower muffler 12.
Enter b.

Here, the refrigerant discharged from below is
The refrigerant discharged from above and the upper muffler 1
2a, enters the lower muffler 12b.

Here, the refrigerant discharged from below is
The refrigerant discharged from above and the upper muffler 1
2a, and is ejected from there into the tank interior 14, passes through the refrigerant passage of the motor section, and is discharged into the discharge pipe 15.
It is guided to the outside of the closed container 2.

In the above conventional configuration, the upper discharge valve 11a and the lower discharge valve 11b are opened, and the refrigerant spouted from the upper discharge hole 10a and the lower discharge hole 10b is transferred to the upper muffler 1.
Since the mixed turbulent flow occurs in 2a, the mixing turbulent sound becomes louder, and the discharge resistance is 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.
2b had various drawbacks, including the risk of damage.

Purpose of the Invention The present invention solves the above conventional problems, and aims to reduce noise by avoiding mixing turbulence between the upper discharge flow path and the lower discharge flow path. .

Structure of the Invention In order to achieve this object, the present invention includes a cylinder having a cylindrical space, an upper end plate closing the end of the cylinder, and a cylinder having a cylindrical space.
a muffler shell which constitutes a cylinder body by the lower end plate, has a discharge hole in each of the upper end plate and the lower end plate, and further constitutes a discharge muffler with the upper end plate and the lower end plate in the cylinder body; An upper discharge chamber and a lower discharge chamber are provided, and a muffler shell of the upper discharge chamber is provided with a hole opening into the sealed container, and a discharge communication hole is further provided.

One end of the discharge communication hole opens into the lower discharge chamber, and the other end passes through the lower end plate 9, the cylinder frame 7, and the upper end plate 8, and further avoids the upper discharge chamber and opens into the upper space within the compressor. Further, a hole corresponding to the hole diameter of the discharge communication hole is formed in a portion of the upper muffler shell corresponding to the position of the discharge communication hole of the upper end plate, and a peripheral portion of the hole is further formed in a portion corresponding to the position of the discharge communication hole of the upper end plate. A soundproofing device for a hermetic compressor that is tightly attached to a plate. A hole corresponding to the diameter of the communication hole is drilled in the part of the upper muffler that corresponds to the position of the communication hole of the compressor, and then that part is tightly attached to the upper end plate. This is what I did.

With this configuration, the upper discharge flow path and the lower discharge flow path are independent, and mixing turbulence is eliminated.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be explained in FIGS. 2 to 4.
This will be explained with reference to the diagram. Here, the same members as those of the conventional one described above are indicated with the same symbols,
The explanation will be omitted.

In Fig. 2, a communication hole 17 larger than the diameter of the communication hole is bored in the part of the upper processed muffler 16 corresponding to the position of the communication hole 13, and then that part is pressed to fit tightly to the upper end plate. be.

In the above configuration, the sucked refrigerant is compressed in the cylinder inner chamber 6 by the compression action of the piston 5, and the refrigerant is compressed through the upper discharge hole 10a and the lower discharge hole 10, respectively.
From b, push open the upper discharge valve 11a and the lower discharge valve 11b, and open the upper processing muffler 16 and the lower muffler 1.
Enter 2b.

Here, from the lower discharge hole 10b, the lower discharge valve 1
The refrigerant pushed open and discharged into the lower muffler 12b passes through the communication hole 13, passes through the communication hole 17 of the upper processed muffler 16, and is ejected into the tank interior chamber 14.

Further, from the upper discharge hole 10a to the upper discharge valve 11
The refrigerant discharged into the upper processed muffler 16 by pushing open the refrigerant a is discharged from a hole (not shown) provided in the upper processed muffler 16.

Then, both pass through the refrigerant passage of the electric motor section,
It is led out of the closed container 2 through the discharge pipe 15.

In this way, the upper discharge flow path and the lower discharge flow path are
By making them independent, the mixing turbulent flow phenomenon of the upper discharge flow and lower discharge flow seen in the conventional example can be prevented, and the generation of vibration and noise caused by this is eliminated.
Discharge resistance is also reduced, and performance deterioration due to overcompression can be prevented.

Effects of the Invention As described above, the present invention constitutes a cylinder body by a cylinder having a cylindrical space, an upper end plate and a lower end plate that close the ends of the cylinder, and each of the upper end plate and the lower end plate A discharge hole is provided, and the cylinder body is further provided with an upper discharge chamber and a lower discharge chamber consisting of the upper end plate, the lower end plate, and a muffler shell that constitutes a discharge muffler, and the muffler shell of the upper discharge chamber is provided with an airtight container. A hole is provided that opens into the hole, and a discharge communication hole is also provided.

One end of the discharge communication hole opens into the lower discharge chamber, and the other end passes through the lower end plate 9, the cylinder frame 7, and the upper end plate 8, and further avoids the upper discharge chamber and opens into the upper space within the compressor. Further, a hole corresponding to the hole diameter of the discharge communication hole is formed in a portion of the upper muffler shell corresponding to the position of the discharge communication hole of the upper end plate, and a peripheral portion of the hole is further formed in a portion corresponding to the position of the discharge communication hole of the upper end plate. Mixing turbulence can be prevented by making the upper discharge flow path and lower discharge flow path independent with the soundproofing device of the hermetic compressor that is closely attached to the plate, eliminating the vibration and noise caused by it, and further reducing the discharge resistance. By doing so, it is possible to prevent performance deterioration due to overcompression.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of a hermetic compressor showing a conventional example, Fig. 2 is a longitudinal cross-sectional view of a hermetic compressor according to an embodiment of the present invention, and Fig. 3 is a front view of an upper processed muffler in the same compressor. 4 are cross-sectional views taken along the X-O-Y line of the upper processed muffler. 2... airtight container, 8... upper end plate, 9... lower end plate,
12b...Lower muffler, 13...Communication hole, 14...Tank interior, 16...Upper processed muffler, 17...Communication hole.

Claims (1)

[Claims] 1. A cylinder 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 provided in each of the upper end plate and the lower end plate, and the The cylinder body is provided with an upper discharge chamber and a lower discharge chamber which are made up of the end plates and a muffler shell that constitutes a discharge muffler, and the muffler shell of the upper discharge chamber is provided with a hole that opens into the airtight container. A discharge communication hole is provided that opens into the chamber, the other end passes through the lower end plate, the cylinder main body, and the upper end plate, and further opens into the upper space of the compressor part avoiding the upper discharge chamber, and further includes a discharge communication hole that opens into the upper muffler shell. In a portion corresponding to the position of the discharge communication hole of the upper end plate,
A soundproofing device for a hermetic compressor, wherein a hole corresponding to the diameter of the discharge communication hole is formed, and a peripheral portion of the hole is brought into close contact with the upper end plate.