JPS63134875A - Inside discharge structure for discharge fluid in sealed type compressor - Google Patents

Abstract

PURPOSE:To suppress the oil splashing by installing a guide body for straightly advancing the discharge fluid at the opened port part to the casing of a discharge chamber. CONSTITUTION:Compressor elements 6 are installed into a sealed casing 1, and the discharge fluid which is compressed is discharged inside the casing 1 through a discharge chamber 12. A guide body 15 for straightly advancing the discharge fluid is installed at the opened port part 17 to the casing of the discharge chamber 12. With such constitution, the discharge of the discharge fluid to the coil end of a motor or to the boss side of a front head can be reduced, and the oil splashing can be reduced.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention includes a compression element installed in a closed casing, and a discharge fluid compressed by the compression element passed through a discharge chamber.
The present invention relates to an internal discharge structure for discharge fluid in a hermetic compressor that discharges fluid into the inside of the casing.

(Prior Art) Conventionally, a closed type has a motor installed in the upper part of a closed casing, and a compression element consisting of a cylinder and a front head and a rear head placed above and below the cylinder installed below the motor. The internal discharge structure of the discharge fluid in the compressor is such that a discharge hole is formed in the front head, a muffler is attached to the upper part of the front head, a discharge chamber is formed inside the muffler, and a discharge hole is formed in the upper part of the discharge chamber. An opening to the casing is formed at an appropriate location in the muffler, and the discharge fluid compressed by the compression element is discharged from the discharge hole into the casing through the discharge chamber and the opening. Ta.

In addition, in order to cope with high-speed operation of the compressor, a discharge hole is formed in the rear head separately from the discharge chamber on the front head side (hereinafter referred to as upper chamber), and a discharge chamber (hereinafter referred to as upper chamber) is formed in the lower part of the rear head. A bypass passage communicating from the lower chamber to the upper chamber is opened to the rear head, the cylinder, and the front head, and the discharged fluid in the lower chamber is transferred to the upper chamber through the bypass passage. The discharge fluid was discharged into the casing from an opening provided in a muffler forming the upper chamber.

(Problem to be Solved by the Invention) However, especially in high-speed operation ranges, the velocity of the discharged fluid increases and the flow of the discharged fluid in the discharge chamber is disturbed, so that the discharged fluid discharged from the opening portion is not discharged vertically upward from the opening, but is discharged toward the fill end of the motor or the bearing protruding from the front head. In particular, as mentioned above,
In a configuration in which the upper and lower chambers are communicated through a bypass passage, the fluid is mixed in the upper chamber, so that the fluid discharged from the opening is even more likely to be discharged in a curved direction. In this way, the discharged fluid that is discharged to the coil end side of the motor and collides with the coil end rebounds downward and disturbs the oil level stored at the bottom of the casing, and also causes damage to the front head. The discharged fluid discharged to the bearing part blows up the oil flowing out from the tip of the bearing part, and in either case, there is a problem that the oil rises or the oil level drops.

The present invention has been made in view of the above-mentioned problems, and by making the direction of the discharge fluid discharged from the discharge chamber into the sealed casing go straight, the blow-up of oil is reduced, and especially in high-speed operation ranges. The main object of this invention is to provide an internal discharge structure for discharge fluid in a hermetic compressor that can prevent oil from rising or falling in the oil level.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a compression element (6) inside a closed casing (1), and a discharge fluid compressed by the compression element (6). An internal discharge structure for a discharge fluid in a hermetic compressor configured to discharge fluid into the casing (1) through a discharge chamber (12), the discharge fluid being discharged into the casing (1) from the discharge chamber (12). A guide body (15) is provided in the opening (17) to direct the direction of the discharged fluid.

(Function) By providing the guide body (15) that allows the direction of the discharged fluid to travel straight in the opening (17) of the discharge chamber (12) to the casing (1), the compression element (6) The discharge fluid compressed in the discharge chamber (
12) from the guide body (15) to the casing (
1) Since the fluid is discharged in a straight line, it is possible to reduce the discharge of fluid to the coil end of the motor or the boss side of the front head, making it possible to prevent oil from rising or dropping in the oil level in high-speed operating ranges. It will become.

(Example) Hereinafter, the internal discharge structure of the discharge fluid in the hermetic compressor according to the present invention will be explained with reference to the embodiments shown in the drawings.

The compressor shown in Fig. 1 has a motor (
A compression element (2) is installed inside the motor (2), and consists of a cylinder (3) located below the motor (2), and a front head (4) and a rear head (5) arranged above and below the cylinder (3). 6), and bearing portions (4a) (5a) extending vertically are provided in the front head (4) and rear head (5), and each of these bearing portions (4a)
A drive shaft (7) is supported by a bearing on (5a), and the upper end of the drive shaft (7) is connected to the motor (2), while the eccentric shaft (7a) of the crankshaft (7) is connected to a roller ( 8) is inserted.

Further, the cylinder (3) is provided with a blade (not shown) that moves forward and backward in constant contact with the roller (8), and a suction hole (16) is provided on the front side of the blade in the rotational direction of the roller (8). Also, on the rear side in the rotational direction, there are upper and lower discharge holes (9a) communicating with the inside of the cylinder (3).
9b), and the discharge holes (9a) and (9b) are provided with discharge valves (1θ) (10).

The front head (4) also has a muffler (11).
) is attached to the muffler (11) to form an upper chamber (12a) constituting one of the discharge chambers (12), and a muffler cover (13) is attached to the rear head (5) to form an upper chamber (12a) constituting one of the discharge chambers (12). The muffler cover (13) forms a lower chamber (12b) that constitutes another one of the discharge chambers (12).

Then, compressible fluid such as gas refrigerant is sucked into the cylinder (3) from the suction hole (16) by the rotation of the roller (8) accompanying the rotational drive of the motor (2), and this suction fluid is The fluid is compressed by the rotation of the roller (8) and raised to a predetermined pressure, and then the discharge valve (1)
0) (10) is opened and the front head (4) is opened.
) and the upper and lower chambers (12a) (12b) from the discharge holes (9a) (9b) of the rear head (5).
These chambers (12a) (12b)
The discharge fluid is discharged into the inside of the casing (1) through the casing (1). In addition, (la) is the suction pipe, (lb)
is the external discharge pipe.

Therefore, the guide body (15) causes the direction of the discharge fluid to go straight to the opening (17) to the casing (1) of the lower chamber (12b) constituting the discharge chamber (12).
).

Specifically, a bypass passage (14a) is provided upward from the lower chamber (12b) and extends through the rear head (5), cylinder (3), and front head (4), and the bypass passage (14a) Said front head (
4) side opening (17), the bypass passage (14a
), and the rotor (2a) of the motor (2) in the casing (1) is formed in the stepped hole.
A guide body (15) made of a cylindrical body facing the air gap (2C) between the and stator (2b) is vertically inserted and fixed, and the upper part of the guide body (15) is attached to the muffler (11).
It is made to protrude upward.

The fluid discharged from the upper chamber (14a) is discharged from openings (not shown) provided at appropriate locations in the muffler (11).

Thus, with the above configuration, the lower chamber (12
b) to the bypass passageway (14a) and the opening (17
) The discharge fluid discharged into the casing (1) is directed by the guide body (15) into the casing (1).
Rotor (2a) and stator (2b) of motor (2) inside
It is discharged straight towards the air gap (2c) between
It can rise smoothly through the air gap (2c).

Further, the fluid discharged from the upper and lower chambers (12a) and (12b) is individually connected to the casing (1).
In other words, the fluid discharged from the lower chamber is not mixed in the upper chamber and then discharged into the casing.
), and the problem of bending of the fluid discharged from the upper chamber (14a) can also be reduced.

Therefore, as a whole, the upper and lower chambers (1
2a) A discharge chamber (12b) consisting of (12b)
) is discharged from the stator (2b) of the motor (2).
) coil end (2f) or the front head (
4) can reduce discharge to the bearing part (4a) side,
Particularly in high-speed operating ranges, oil rise and oil level drop can be prevented.

In the above embodiment, the guide body (15) is made of a cylindrical body made of a separate member, but as shown in FIG. 2, the front head (4) has a bypass passage (14a) extending from the lower chamber. A protrusion (41) having an inner hole (40) communicating with the front head (4) may be provided, and the guide body (15) may be configured integrally with the front head (4) by the protrusion (41). , as shown in Figure 3, the muffler (11)
A concave hole (50) is formed by drawing the concave hole (50).
0), the guide body (15) is integrated with the muffler (11).
) may be configured.

Further, in the above embodiment, the guide body (15) was provided only at the opening (17) of the lower chamber (12b), but as shown in FIG. (17a) (17b) respectively guide bodies (15a) (1
5b) may be provided.

That is, from the lower chamber (12b), through the rear head (5), rising vertically within the wall of the cylinder (3) and extending horizontally toward the casing (1) at an appropriate position, near the casing (1). A bypass passage (1) stands vertically upward along the casing (1) at
4b), and a stepped hole portion having a slightly larger diameter than the bypass passage (14b) is formed in the opening (17b) of the bypass passage (14b) on the side of the cylinder (4), and the stepped hole portion The inner wall surface of the casing (1) and the said casing (
The passageway (2) formed between the core cut surface (2d)
A guide body (15b) consisting of a cylindrical body is disposed opposite to the guide body (15b
) is vertically inserted and fixed, while the muffler (11) forming the upper chamber (12a) is inserted between the rotor (2a) and the stator (2b) of the motor (2), as shown in FIG. A guide body (15a) consisting of a cylindrical protrusion is formed by integral molding at a location facing the air gap (2c). -Thus, with the above configuration, the bypass passage (14
b) and the casing (1) via the opening (17b).
The discharged fluid discharged into the cylindrical guide body (15b
), it is discharged straight toward the passage (2e) formed by the core cut surface (2d) of the motor (2) in the casing (1), and can rise smoothly through the passage (2e). On the other hand, the upper chamber (1
The discharged fluid discharged into the casing (1) from 2a) is directed to the motor (2) by the guide body (15a) consisting of a cylindrical protrusion formed on the muffler (11).
is discharged straight toward the air gap (2C) between the rotor (2a) and the stator (2b), and the air gap (
2C) and ascend smoothly.

Moreover, the fluids discharged from the two chambers (12a) and (12b) are discharged individually, and bending due to mixing can be eliminated, so the overall effect of preventing oil rise and oil level drop is further improved. It can be done.

Note that the guide body (15a) for the upper chamber (12a)
) is formed integrally with the muffler (11) as shown in Fig. 5, and as shown in Fig. 6, a cylindrical body made of a separate member is formed vertically upward from the opening (17a) provided in the muffler (11). The guide body (15a) may be fixed by welding or the like.

Moreover, the guide body (15b) is not provided in the opening (17b) of the lower chamber (12b), and the upper chamber (12b) is not provided with the guide body (15b).
The guide body (15a) shown in FIGS. 5 and 6 may be provided only in the opening (17a) in a).

Furthermore, the compressor explained above has two chambers (
12a) and (12b), and their discharge fluids are individually discharged into the casing (1), but it is not necessarily necessary to discharge them individually; for example, once the lower chamber (12b) is Upper chamber (12a
), and the discharge may be made only from the opening of the upper chamber (L2a). In this case, the guide body (15a) is attached to the opening of the upper chamber (12a).
).

Furthermore, for a compressor that does not have a lower chamber (12b) but only an upper chamber (12a), a guide (L5a) is provided at the opening of the upper chamber (12a).

(Effects of the Invention) As described above, the present invention includes a compression element (6) installed in the hermetic casing (1), and discharge fluid compressed by the compression element (6) through the discharge chamber (12). , an internal discharge structure for a discharge fluid in a hermetic compressor configured to discharge fluid into the inside of the casing (1), wherein an opening (1) of the discharge chamber (12) to the casing (1) is provided.
7) is provided with a guide body (15) that causes the direction of the discharge fluid to move straight, so that the discharge fluid compressed by the compression element (6) passes through the discharge chamber (12) to the guide body (15). 15), the fluid is discharged straight into the casing (1), so it is possible to reduce the discharge of the discharge fluid to the coil end of the motor or the boss side of the front head, thereby reducing oil blow-up. In particular, it is possible to prevent oil from rising or dropping in the oil level in high-speed operating ranges.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of a compressor equipped with an internal discharge structure according to the present invention, and FIGS. 2 and 3 illustrate another example of a guide body for a discharge chamber on the lower side of the same. 4 is a vertical sectional view of another embodiment of the compressor equipped with the same internal discharge structure; FIG. 5 is a sectional view of the main part of a guide body for the upper discharge chamber; FIG. 6 is a sectional view of the main part. FIG. 2 is a cross-sectional view of a main part of another example of the guide body for the discharge chamber on the upper side of the same. (1)... Sealed casing (6)... Compression element (12) (12a) (12b) =...
・Discharge chamber

Claims (1)

[Claims] (1) A compression element (6) is installed inside the hermetic casing (1), and the discharge fluid compressed by the compression element (6) is discharged into the casing (1) through the discharge chamber (12). In the internal discharge structure of the discharge fluid in the hermetic compressor, the guide body (15) causes the direction of the discharge fluid to advance straight to the opening (17) of the discharge chamber (12) to the casing (1). An internal discharge structure for discharge fluid in a hermetic compressor, characterized in that it is provided with: