JPS63280885A - Enclosed rotary compressor - Google Patents

Abstract

PURPOSE:To improve the productivity and reduce the number of parts without damaging the noise reducing effect by forming overlapping portions in inner and outer enclosed cases of a compressor which are provided with intake and discharge pipes and current supply terminals. CONSTITUTION:A first enclosed case 2 is formed on the cylindrical body 2a with outward projections 16, 17 and a second enclosed case 5 formed on the cylindrical body 5a with inward projections 18, 19, 20 so that the inner and outer cylindrical bodies are stuck to each other in the respective projections to form overlapping portions A, B, C, D, while a space 21 is formed between both cases 2, 5. To the overlapping portions are welded pipes 22, 23, 24 for discharge, intake and charge and a current supply terminal 25. Thus, vibrations and noises of motor section 3 and compressor section 4 transmitted to the outside are not only reduced, but also the operability of welding and assembling can be improved. And any vibration preventing rubber is not needed between both cases and only one current supply terminal 25 will do so that the number of parts is reduced. Also, the space 21 is filled with refrigerant to restrain the compressor from overheat.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a relatively small hermetic rotary compressor mounted on a household refrigerator or the like.

(B) Conventional technology Conventionally, in this type of hermetic rotary compressor, in order to reduce the operational noise generated from the compressor,
As disclosed in Japanese Utility Model Publication No. 249 and Japanese Utility Model Publication No. 55-56224, there are cases in which the sealed case has a double structure. In this case, the electric motor section and the compressor section are press-fitted into the first sealed case, and the first sealed case includes a suction pipe, a discharge pipe extending outside the case, and a first pipe exposed outside the case. power supply terminals are welded to each other, the first sealed case is covered with a second sealed case, and the suction pipe and the discharge pipe are fixed to the second sealed case, and the second A second power supply terminal electrically connected to the first power supply terminal is fixed to the sealed case, and vibration-proof rubber is further installed in the space between the first and second sealed cases. By arranging the compressor, the closed case forms a compressor with a double structure.

(c) Problems to be solved by the invention However, according to the above configuration, the second sealed case covers the first sealed case so that a space is formed around the entire circumference of the first sealed case. Therefore, the suction pipe and the discharge pipe must be welded to both the first sealed case and the second sealed case, and there is a problem that welding workability is poor due to the large number of welded parts. Further, two power supply terminals, a first and a second power supply terminal, are required to supply power to the electric motor section, which increases the number of parts and complicates installation and wiring work. Furthermore, since the position of the first sealed case is restricted within the second sealed case by the suction pipe and the discharge pipe, each pipe must be made flexible in order to absorb the vibrations of the first sealed case. (for example, by bending the discharge pipe into a circular shape), or by interposing multiple vibration-proof rubbers in the space between both cases, which not only increases the number of parts and increases costs, but also requires assembly work. The problem was that it became complicated.

The present invention has been developed in view of these points, and it provides good welding workability for pipes and power supply terminals without impairing the noise reduction effect of the double-structured sealed case, and is easy to assemble with a small number of parts. The purpose is to provide a hermetic rotary compressor that is easy to work with.

B) Means for Solving the Problems The present invention comprises a first sealed case in which a motor section and a compressor section are tightly joined together by press-fitting or shrink-fitting, and
In a case in which a pipe extending outside the case and a power supply terminal exposed outside the case are welded to the first sealed case, a second sealed case is provided to cover the first sealed case, and At least one of the first sealed case at the mounting part of the pipe or power supply terminal, and the second sealed case corresponding to the pipe or power supply terminal mounting part of the first sealed case, has an outer or A protruding part protruding inward is provided, the protruding parts or the protruding part and the other sealed case are brought into close contact and overlapped, and the pipe or power supply terminal is exposed from the second sealed case at this overlapped part. It is fixed.

(E) Function The hermetic rotary compressor of the present invention has the above-described structure, and the first hermetic case is covered with the second hermetic case, which not only reduces the operating noise of the compressor by making the case double-structured. ,
Due to the protruding parts provided on one side of the first sealed case and the second sealed case, an overlapping part can be formed in which the pipes and power supply terminals of both cases are attached in close contact with each other. , in this polymerization part co-events,
The first sealed case and the second sealed case, or the power supply terminal, the first sealed case, and the second sealed case can be welded at the same time to form a single unit, improving welding work efficiency. At the same time, it is possible to improve assembly workability. In addition, since the first sealed case and the second sealed case are firmly joined at the overlapping portion, there is no need to interpose vibration-proof rubber or the like in the space between the two cases as in the past.
Moreover, since only one power supply terminal is required, the number of parts can be reduced and costs can be reduced.

(f) Example Embodiments of the present invention will be described below based on the drawings.

1 houses a motor section 3 and a compressor section 4 in a cylindrical first sealed case 2, and this first sealed case 2 is housed in a first sealed case 2.
This is a hermetic rotary compressor that is covered with a second hermetic case 5 which is larger than the hermetic case 5.

The first sealed case 2 includes a cylindrical body 2a and an upper lid 2b welded to the cylindrical body to close the upper and lower openings of the cylindrical body.
and a lower lid 2c having a plurality of holes 2d. The electric motor section 3 consists of a stator core 7 around which a coil 6 is wound and a rotor 8, and the stator core is connected to a cylindrical body 2a.
It is fixed to the first sealed case 2 by shrink fitting therein.

The compressor section 4 includes a substantially circular cylinder block 9, a roller 12 which rotates eccentrically within a cylinder 11 of the block by a crankshaft 10 connected to the rotor 8, and a cylinder whose tip is constantly pressed against the roller. It consists of a vane 13 that divides the inside of the cylinder 11 into a high-pressure side and a low-pressure side, and an upper frame 14 and a lower frame 15 that close the upper and lower openings of the cylinder 11. By welding the cylinder block 9 to the cylindrical body 2a, the first It is fixed in a sealed case 2. Also, the first
The cylindrical body 2a of the sealed case 20 is formed with protrusions 16 and 17 that partially protrude outward by press working. The second closed case 5 is formed of a cylindrical body 5a, and an upper lid 5b and a lower lid 5c welded to the cylindrical body so as to close the upper and lower openings of the cylindrical body. Also,
Projections 18, 19, and 20 that partially project inward are formed in the second sealed case 5 by press working. The first sealed case 2 and the second sealed case 5 include a protruding part 18 of the cylindrical body 5a, a protruding part 16 of the cylindrical body 2a, a protruding part 19 of the cylindrical body 5a, an outer peripheral surface of the cylindrical body 2a, a cylindrical The protruding part 20 of the body 5a and the outer circumferential surface of the cylindrical body 2a, and the protruding part 17 of the cylindrical body 2a and the inner circumferential surface of the cylindrical body 5a are partially in close contact and overlapped, and the overlapping parts A, B, C,
On the other hand, a space 21 is formed between the two bases 2 and 5. 22 is a discharge pipe welded to the hole of overlapped part A, 23 is a suction pipe welded to the hole of overlapped part B, 2
4 is a charge pipe welded to the hole of the overlapped part C, 25
is a power supply terminal welded to the hole in the overlapping area.

The hermetic rotary compressor constructed in this way has a double structure case consisting of the first hermetic case 2 and the second hermetic case 5, which covers the electric motor part 3 and the compressor part 4. Not only can it reduce the transmission of vibration and noise to the outside, but it can also reduce the transmission of vibrations and noise to the outside.

Since the first sealed case 2 and the second sealed case 5 are brought into close contact with each other at C and D, and the pipes 22, 23, 24 and the power supply terminal 25 are attached to the overlapping part, the first sealed case 2 and the second sealed case 5 are brought into close contact with each other. It is possible to simultaneously weld the sealed case 5, the pipes 22, 23, 24, and the power supply terminal 25, thereby improving welding workability and assembling efficiency.

In addition, since the first sealed case 2 and the second sealed case 5 are firmly fixed at the overlapping portion, there is no need to interpose vibration-proof rubber or the like in the space between the two cases as in the conventional structure. , Also, since only one power supply terminal 25 is required,
The number of parts and costs can be reduced.

Furthermore, since a plurality of holes 2d are provided in the lower lid 2C of the first sealed case 2, the space 21 between the two cases 2 and 5 can be filled with oil or refrigerant, thereby suppressing heating of the compressor. be able to.

In this embodiment, the lower cover is provided with a plurality of holes to fill the space with oil or refrigerant, but the space may be sealed and the inside may be evacuated.
When the space is communicated with the inside of the first case, the space may be filled with a vibration-absorbing material having refrigerant resistance and oil resistance, and in these cases, a further soundproofing effect can be obtained.

(G) Effects of the Invention As described above, according to the configuration of the present invention, not only can the noise of the compressor be reduced by making the sealed case double-structured, but also the pipe and power supply can be connected to the overlapping part of both cases. By using this method, both cases, pipes, and power supply terminals can be welded together to form a single unit, and welding workability and assembly workability can be improved. Furthermore, there is no need to use anti-vibration rubber or the like in the space between the two cases.
Furthermore, since only one power supply terminal is required, the number of parts and costs can be reduced.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view of a hermetic rotary compressor showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Sealed rotary compressor, 2... First sealed case, 3... Electric motor section, 4... Compressor section, 5.
...Second sealed case, 16.17.18,19.
20...Protrusion part, 22...Discharge pipe, 23
...Suction pipe, 24...Charge pipe,
25...Power supply terminal, A, B, C, D...
・Polymerization part.

Claims (1)

[Claims] (1) The electric motor section and the compressor section are closely connected to each other by press-fitting or shrink-fitting in the first sealed case, and
In a case in which a pipe extending outside the case and a power supply terminal exposed outside the case are welded to the sealed case, a second sealed case covering the first sealed case is provided, and a second sealed case is provided that covers the first sealed case. and a first sealed case in the mounting part of the power supply terminal, and a second sealed case corresponding to the pipe of the first sealed case and the mounting part of the power supply terminal.
At least one of the sealed cases is provided with a protruding part that protrudes outward or inward, and these protruding parts or the protruding part and the other sealed case are brought into close contact and overlapped, and the pipe or power supply terminal is attached to this overlapped part. A hermetic rotary compressor, characterized in that: is exposed and fixed from a second hermetic case.