JP3235567B2 - Compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic rotary compressor constituting a refrigerant cycle, and more particularly to a structure for mounting a refrigerant suction portion of a compressor.

[0002]

2. Description of the Related Art Conventionally, as a structure of a refrigerant suction portion of a hermetic compressor, generally, a connection port for connecting a refrigerant flow pipe of an accumulator is provided in a closed casing containing a compression element. (See, for example, JP-A-63-36075). Here, a mounting structure between the refrigerant suction port and the refrigerant flow pipe of such a conventional compressor will be described with reference to FIG. A connection port 2a is provided at a position corresponding to the refrigerant suction port 10 of the cylinder 12 on the side wall of the body shell 2 which is a casing of the compressor. One end of the copper body liner 22 is connected to the connection port 2a by a low-speed connection. Fixed by appendix B1.
An iron pump liner 23 is inserted into the body liner 22, one end of which is press-fitted into the refrigerant suction port 10 of the cylinder 12, and the other end thereof is inserted with a refrigerant flow pipe 31 of an accumulator. The pump liner 23 and the refrigerant flow pipe 31 are fixed to the body liner 22 by brazing B2.

[0003]

However, the mounting structure of the refrigerant suction portion of the compressor as described above has the following problems.
2. Since it has a triple structure composed of three pipes of the pump liner 23 and the refrigerant flow pipe 31, the number of parts and the number of assembling steps are increased, resulting in an increase in the cost of the compressor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a compressor capable of reducing a manufacturing cost by reducing the number of components of a refrigerant suction section and an assembling process. With the goal.

[0005]

In order to achieve the above object, a first aspect of the present invention is a compressor having a compressor element having a refrigerant suction port provided inside a casing, and the refrigerant suction port being connected to an accumulator. , A connection port is formed in a portion of the side wall of the casing corresponding to the refrigerant suction port, and a connection cylinder having an outer diameter substantially equal to the inner diameter of the connection port is fixed to the connection port; The inner end of the body to the inner wall of the casing
So as to be flush with the surface, the connection cylinder is made of copper,
Fixed between the connection cylinder and the connection port by brazing
And compressing the compression element so as to reach the inner surface of the casing.
Is instrumentation, the refrigerant flow connecting said accumulator is fixed to the connecting cylinder while pressed into the refrigerant suction mouth of said compression element through the connecting tube body, the refrigerant flow connecting the copper
There is a braze between the refrigerant flow pipe and the connection cylinder.
It is more fixed .

In this configuration, the refrigerant flow pipe of the accumulator is elongated, and this refrigerant flow pipe is directly connected to the refrigerant suction port of the compression element, so that the conventional triple-type refrigerant suction section is provided. In the structure, a member corresponding to the pump liner that connects the refrigerant flow pipe and the refrigerant suction port can be omitted. In addition, connection with brass with good workability
It becomes possible to adopt the continuation.

In the first aspect, the connection cylinder is made of copper, and the connection between the connection cylinder and the connection port is fixed by brazing, and the refrigerant flow pipe is made of copper. It is desirable to fix the space between the pipe and the connection cylinder by brazing. The combination of these members makes it possible to employ a brazed connection with good workability.

According to a third aspect of the present invention, there is provided a compressor in which a compression element having a refrigerant suction port is provided in a casing and the refrigerant suction port is connected to an accumulator. Forming a connection port at a portion to be connected, press-fitting a connection cylinder having an outer diameter substantially equal to the inner diameter of the connection port into the refrigerant suction port of the compression element through the connection port, and fixing the connection cylinder to the accumulator, Is inserted and fixed. In this configuration, in the structure of the conventional triple refrigerant suction section,
A member corresponding to the body liner can be omitted.

According to a third aspect of the present invention, the connection cylinder is made of copper or iron, and the connection cylinder and the connection port are fixed by brazing or welding, and the refrigerant flow pipe is made of copper. It is desirable to fix the flow tube and the connecting cylinder by brazing.

According to a fifth aspect of the present invention, there is provided a compressor in which a compression element having a refrigerant suction port is provided in a casing and the refrigerant suction port is connected to an accumulator. A connection port is formed at a portion to be connected, and a refrigerant flow pipe of an accumulator having an outer diameter substantially equal to the inner diameter of the connection port is pressed into the refrigerant suction port of the compression element through the connection port and fixed to the connection port. .

[0011] In this configuration, the refrigerant flow pipe of the accumulator can be elongated, and this refrigerant flow pipe can be directly connected to the refrigerant suction port of the compression element. The member corresponding to the pump liner that connects the refrigerant flow pipe and the refrigerant suction port and the member corresponding to the body liner that covers the outer periphery of the pump liner can be omitted.

In the present invention, it is preferable that the refrigerant flow pipe is made of iron, and that the refrigerant flow pipe and the connection port are fixed by welding.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 is a longitudinal section of a compressor according to the present embodiment, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is an enlarged sectional view of a refrigerant suction port of the compressor 1. Is shown. This compressor 1
Is a rotary rotary compressor having a motor 3 (electrical element) above a trunk shell 2 (casing) and a compression element 5 interlocked via a crankshaft 4 at a lower position of the motor 3. is there.

The compression element 5 includes a cylinder 12 having a refrigerant suction port 10 and a refrigerant compression chamber 11, a front head 13 and a rear head 14 fixed to upper and lower portions of the cylinder 12, and a refrigerant compression chamber of the cylinder 12. 11 is a roller 1 rotatably built in and rotated by an eccentric portion 17 of a crankshaft 4 rotated by a motor 3
8 (also referred to as a piston).

An accumulator 30 is disposed at a side position of the body shell 2.
A refrigerant flow pipe 31 (also referred to as an inner pipe) extending from 0 is connected to the refrigerant suction port 10 of the cylinder 12. Compression element 5
Compresses the refrigerant supplied from the refrigerant flow pipe 31 into the refrigerant compression chamber 11 of the cylinder 12 by the rotation of the roller 18. The compression element 5 reciprocates following the rotational movement of the roller 18, and the refrigerant compression chamber 11 of the cylinder 12 is moved.
A vane 19 (FIG. 2) for dividing the inside into a high-pressure chamber and a low-pressure chamber;
This vane 19 is pressed against the roller 18 to
And a vane spring 20 that slides with respect to 8. The vane spring 20 is inserted into a spring insertion hole 21 formed in an inner wall of the cylinder 12 facing the refrigerant compression chamber 11, and is guided into the spring insertion hole 21.

Next, the mounting structure of the refrigerant flow pipe 31 of the accumulator 30 to the refrigerant suction port 10 of the cylinder 12 will be described. A connection port 2a is formed in a portion of the body shell 2 (made of iron) facing the refrigerant suction port 10 of the cylinder 12 by drilling or the like, and the connection port 2a has an outer diameter substantially equal to the inner diameter thereof. The copper body liner 22 (connection housing) is fixed by brazing B1. In addition, a copper refrigerant flow pipe 31 extends through the body liner 22 through the refrigerant inlet 10.
And fixed to the barrel liner 22 by brazing B2. The cylinder 12 is fixed to the body shell 2 by welding.

As described above, according to the compressor 1 of the present embodiment, the refrigerant flow pipe 31 of the accumulator 30 is directly connected to the refrigerant suction port 10 of the cylinder 12, and the conventional cylinder liner, pump liner and refrigerant flow are connected. Since the pump liner can be omitted from the mounting structure of the triple refrigerant suction portion including the pipe, the refrigerant flow pipe 31 is lengthened instead, and the same function as the pump liner is given to the pump flow liner. The number of locations is also two (three conventionally), the number of parts and the number of assembly steps can be reduced, and the manufacturing cost of the compressor 1 can be reduced.

(Second Embodiment) FIG. 4 is an enlarged sectional view of a refrigerant suction port of a compressor according to a second embodiment. An iron pump liner 23 having an outer diameter substantially equal to the inner diameter is inserted into the connection port 2 a of the trunk shell 2, and is pressed into the refrigerant suction port 10 of the cylinder 12. The pump liner 23 is fixed to the connection port 2a by circumferential welding W1. The coolant line 31 of the accumulator is inserted into the pump liner 23, and is fixed to the pump liner 23 with a braze B3.

As described above, since the refrigerant flow pipe 31 can be connected only by interposing the pump liner 23, the conventional cylinder liner, pump liner, and refrigerant flow pipe 3 can be connected.
The body shell can be omitted from the heavy refrigerant suction portion mounting structure, the number of parts and the number of assembly steps can be reduced, and the manufacturing cost of the compressor can be reduced.

Conventionally, the shell 2 and the pump liner 23 are often fixed to each other by silver brazing. In this case, the cost of the compressor is increased, and the flux is removed. Although the deflux treatment was required, as in the present embodiment, by fixing the both by welding, the number of manufacturing steps can be reduced, and the number of component materials can be reduced. The pump liner 23 may be made of copper. In this case, a certain thickness is required. In this case, the fixing between the pump liner 23 and the shell 2 is performed by brazing.

(Third Embodiment) FIG. 5 is an enlarged sectional view of a refrigerant suction port of a compressor according to a third embodiment. At the connection port 2a of the body shell 2, an iron refrigerant flow pipe 31 having an outer diameter substantially equal to the inner diameter is press-fitted into the refrigerant suction port 10 of the cylinder 12 through the connection port 2a, and is connected to the connection port 2a. It is fixed by welding W2. As described above, since the refrigerant flow pipe 31 is lengthened and the conventional pump liner is pressed into the refrigerant suction port 10 in the same manner, the triple refrigerant including the conventional body liner, the pump liner, and the refrigerant flow pipe is provided. The shell and pump liner can be omitted from the mounting structure of the suction section,
Only one welding point is required, the number of parts and the number of assembly steps can be reduced, and the manufacturing cost of the compressor can be reduced.

The present invention is not limited to the above embodiment, but can be variously modified. For example, in the above-described embodiment, a rotary rotary compressor has been described, but the present invention can be similarly applied to a scroll rotary compressor.

[0023]

As described above, according to the compressor of the first aspect of the present invention, the connection cylinder is fixed to the connection port on the side wall of the casing, and the refrigerant flow pipe of the accumulator is compressed through the connection cylinder. Since the element is press-fitted into the refrigerant suction port, the pump liner that connects the refrigerant flow pipe and the refrigerant suction port in the conventional triple-type refrigerant suction port mounting structure can be omitted. Thereby, the number of parts and the number of assembly steps can be reduced, and the manufacturing cost of the compressor can be reduced.

According to the compressor according to the third and fourth aspects of the present invention, the connecting cylinder is press-fitted into the refrigerant suction port of the compression element through the connection port on the side wall of the casing, and is fixed to the connection port. Since the refrigerant flow pipe of the accumulator is inserted and fixed in the connecting cylinder, the connection between the refrigerant flow pipe and the refrigerant suction port is established in the conventional triple-type refrigerant suction unit mounting structure. The torso liner can be omitted. Thereby, the number of parts and the number of assembly steps can be reduced, and the manufacturing cost of the compressor can be reduced.

In the compressor according to the fifth and sixth aspects of the present invention, the refrigerant flow pipe of the accumulator is pressed into the refrigerant suction port of the compression element through the connection port on the side wall of the casing. Together with the connection port, it is possible to omit the body liner and the pump liner that connect the refrigerant flow pipe and the refrigerant suction port in the conventional triple-type refrigerant suction port mounting structure. . Thereby, the number of parts and the number of assembly steps can be reduced, and the manufacturing cost of the compressor can be reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing the entire structure of a rotary compressor according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged sectional view of a refrigerant suction port of the compressor according to the first embodiment.

FIG. 4 is an enlarged sectional view of a refrigerant suction port of a compressor according to a second embodiment.

FIG. 5 is an enlarged sectional view of a refrigerant suction port of a compressor according to a third embodiment.

FIG. 6 is an enlarged sectional view of a refrigerant suction port of a conventional compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Body shell (casing) 2a Connection port 10 Refrigerant suction port 12 Cylinder (compression element) 22 Body liner (connection cylinder) 23 Pump liner (connection cylinder) 30 Accumulator 31 Refrigerant flow pipe

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-301966 (JP, A) JP-A-59-177785 (JP, U) JP-A-1-61472 (JP, U) (58) Investigation Field (Int. Cl. ⁷ , DB name) F04B 39/12 101 F04C 29/00

Claims (1)

(57) [Claims] A compression element having a refrigerant inlet;
And the refrigerant inlet is connected to an accumulator.
A portion corresponding to the refrigerant suction port on a side wall of the casing.
A connection port is formed at the connection port, and the inside diameter of the connection port is substantially the same as that of the connection port.
Fix the connecting cylinder with the same outer diameter,Of this connecting cylinder
So that the one end is flush with the inner wall surface of the casing,
The connection cylinder is made of copper, and the connection cylinder is connected to the connection port.
Fix the space by brazing, The compression element is installed so as to reach the inner surface of the casing.
Let  The refrigerant flow pipe of the accumulator is
And press-fit into the refrigerant suction port of the compression element.
Fixed to the connecting cylinderThe refrigerant flow pipe is made of copper.
Between the refrigerant flow pipe and the connection cylinder by brazing
IA compressor characterized in that: