JP2980385B2 - Horizontal rotary 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 horizontal rotary compressor, and more particularly to a horizontal rotary compressor capable of securely fixing a suction pipe to each cylinder and saving space.

[0002]

2. Description of the Related Art Generally, in a two-cylinder type rotary compressor, as shown in FIG.
The suction pipes 55 and 56 are respectively connected to the casing 53 from the side of the casing 53 so as to be orthogonal to the crankshaft 54 so as to send the refrigerant gas to the internal compression chambers (see Japanese Patent Application Laid-Open No. 63-38691). ). Also, in this type of rotary compressor, the crankshaft eccentrically moves inside the cylinder, so that the distance between the bearings supporting the rotary shaft at both ends is designed to be as short as possible in order to maintain rotational stability. In order to keep the overall height low even in a horizontal rotary compressor developed from the viewpoint of space saving, the above suction pipe is arranged so as to be parallel to the crankshaft, and it is structured to penetrate the casing of the rotary compressor and fix it to the bearing. ing.

Further, in order to improve the suction efficiency of the compressor, improvements have been made such that two suction pipes are respectively connected to the bearings and the diameter of each suction pipe is increased.

[0004]

However, since a plurality of mounting bolts and mufflers are arranged on the sub-bearing of the above-mentioned horizontal rotary compressor, the space for fixing the suction pipe is limited to a narrow portion. For this reason, two suction pipes must be arranged close to each other, penetrate the casing, and fix the pipe ends to the bearings. Further, a through-hole for connecting an adjacent pipe is formed in the casing, and a suction pipe is inserted into this through-hole to seal a gap with the through-hole around the pipe by brazing or the like. To fix the suction pipe. However, since this casing is formed by plastic working such as deep drawing, when locally heated as described above, thermal deformation occurs around the casing, and a crack may be generated between the through holes. . Further, when the suction pipe is fixed to the sub-bearing, a fixing method such as brazing as in the case of the casing or forming a tapered hole in the sub-bearing and caulking the tip of the suction pipe in this hole is employed. However, in the case of caulking and fixing, there is a problem that the sub-bearing is deformed during the caulking process because a hole close to the sub-bearing is formed.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems of the conventional technology and to provide a horizontal rotary compressor capable of securely fixing a suction pipe to each cylinder and reducing the size of a casing. It is in.

[0005]

According to the present invention , a first cylinder and a second cylinder are partitioned by a partition plate in a casing, and a two-chamber compressor section is provided.
In transverse the horizontal rotary compressor as the crankshaft is horizontal, fixed to one end of the first suction pipe drilled the crankshaft parallel to the through-hole in the sub-bearing which is fixed to the first cylinder And
Place this first suction pipe parallel to the crankshaft
Place the crankshaft at a predetermined position on the partition plate
And bored parallel through-holes and fixed to one end of the second suction pipe that is connected to the second cylinder, the second suction path
Place the Ip parallel to the crankshaft and
The second cylinder is opposed to the second suction pipe in the second cylinder.
A communication portion communicating with the compression chamber is provided at a position where the compression chamber is located.

[0006]

According to the present invention, the second suction pipe is connected to the (sub
(Rather than ringing)
By communicating with the compression chamber of the second cylinder,
Even if the diameter of the suction pipe is increased,
It becomes difficult to shape. In addition, the first suction pipe and the second suction pipe
Compared to connecting both pipes to sub bearings
Since the connection position of each suction pipe can be separated,
Even if the diameter of each suction pipe is increased, these suction pipes
To reduce the strength of the casing where the
Can be.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a horizontal rotary compressor according to the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 denotes a casing, and the inside of the casing 1 is composed of an electric motor unit 2 and a compressor unit 3. The electric motor unit 2 includes a cylindrical stator 4 fixed to the inner surface of the casing 1 and a rotating shaft (crankshaft) facing the stator 4 inside the stator 4.
And a rotor 6 fixed to the rotor 5 . Also,
One end of the rotating shaft 5 extends from the electric motor section 2 to the compressor section 3 and is rotatably supported by a sub bearing 7 and a main bearing 8.

Further, between the sub bearing 7 and the main bearing 8, a part of the rotating shaft 5 is substantially
Eccentric crank portions 9 and 10 are formed at an angle of 80 °.
A second cylinder 12 is arranged at an outer peripheral position of the crank portion 10. A partition plate 13 is interposed between the first cylinder 11 and the second cylinder 12, and these are integrally fixed by a through bolt 14. Further, ring-shaped rollers 15 and 16 are fitted around the outer circumferences of the crank portions 11 and 12, and rotate eccentrically with the rotation of the rotating shaft 5.

On the other hand, inside the first cylinder 11 and the second cylinder 12, flat blades 17, 18 are respectively urged toward the center of the rotation shaft by a compression spring (not shown) as shown in FIG. The roller is mounted toward the center of the rotation shaft, and the tip thereof comes into contact with the outer peripheral surfaces of the rollers 15 and 16. The blade 17 is disposed substantially vertically in the lowermost portion of the cylinder 11.
The blade 18 is mounted in the cylinder 12 at an angle θ ₁ with the blade 19. The blades 17 and 18 reciprocate in the cylinders 11 and 12 by the eccentric rotation of the rollers 15 and 16.

At this time, a closed space surrounded by the blade 17 and the roller 15 and the first cylinder 11, and a closed space surrounded by the blade 18 and the roller 16 and the second cylinder 12 form compression chambers 19 and 20, respectively. The compression and discharge of the refrigerant gas can be performed by changing the volume of the chambers 19 and 20.

Further, lubricating oil is stored in the casing 1 in order to prevent abrasion at the blade sliding portions inside the cylinders 11 and 12 and to maintain smooth rotation of the electric motor. The lubricating oil is supplied to each sliding portion via an oil pipe 21 by a pumping action of the reciprocating motion of the blade 17, and the lower end of the oil pipe 21 is disposed on the outer periphery of the sub bearing 7. It is attached to a mounting plate 22 fixed to the outer surface of the cylinder 12.

At this time, it is connected to the first cylinder 11
The (first) suction pipe 23 is connected from the oil pipe 21 which is fixed substantially vertically as shown in FIG.
Is fixed in the opposite direction to an angle of theta ₂ is formed in a predetermined position of the sub bearing 7 (the rotary shaft 5 parallel) through holes and. Further, in order to smoothly send the refrigerant flowing out of the suction pipe 23 into the compression chamber 19, a tapered cutout 25 is formed in the cylinder at the suction port 24.

On the other hand, it is connected to the second cylinder 12 (the
2) the suction pipe 26 is directly fixed to the partition plate 13 at a position shifted at an angle theta ₃ only the oil pipe 21 side from the position of the suction pipe 23. A tapered notch is provided at a position facing the suction port 27 inside the second cylinder 12.
(Communication part communicating with compression chamber 20) 28 is formed similarly to the first cylinder. In this embodiment, θ ₁ and θ ₃
While placing the suction pipe set substantially equal, the suction pipe 23 and the suction pipe 26 can sufficiently secure the spacing, the sub bearing 7 If no positional structural hindrance
And any position of the partition plate 13. FIG. 3 shows a partition plate 13. The partition plate 13 separates the first cylinder 11 and the second cylinder 12, and a through hole 29 for fixing the suction pipe 26 is eccentric from a through hole 30 of the rotating shaft. At a position parallel to the rotating shaft 5 . The partition plate 13 may have any shape as long as it can partition the compression chambers 19 and 20.

According to the present embodiment from the above configuration,
During operation of the compressor, the refrigerant can be reliably fed into the corresponding cylinders 11 and 12 via the two suction pipes 23 and 26, and further along the tapered cutouts 25 and 28 formed in the cylinders. To the compression chamber 19,2
It can be spread smoothly within 0.

[0015]

According to the present invention, the first suction pipe and the second suction pipe are connected to each other.
Both suction pipes are arranged parallel to the crankshaft
Then, lower the overall height of the horizontal rotary compressor.
While making it possible to suppress the second suction pipe
(Not sub bearings)
This was made to communicate with the compression chamber of the second cylinder.
Therefore, even if the diameter of each suction pipe is increased,
The deformation of the ring can be prevented. Also, the first suction
Both the pipe and the second suction pipe are sub bearings
Separate the connection position of each suction pipe compared to when connecting
To increase the diameter of each suction pipe.
Also, cracks in the casing through which these suction pipes penetrate
Can be prevented.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a horizontal rotary compressor according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a perspective view showing an example of a partition plate.

FIG. 4 is a longitudinal sectional view showing an example of a conventional rotary compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Motor part 3 Compressor part 7 Sub bearing 8 Main bearing 9 Crank part 10 Crank part 11 1st cylinder 12 2nd cylinder 13 Partition plate 17 Blade 18 Blade 19 Compression chamber 20 Compression chamber 21 Oil pipe 23 Suction pipe 26 Suction pipe

Claims (1)

(57) [Claims] In a casing, a first cylinder and a second cylinder are partitioned by a partition plate, and a two-chamber compressor section is provided.
In a horizontal rotary compressor in which a crankshaft is placed horizontally so as to be horizontal, a through-hole parallel to the crankshaft is drilled in a sub-bearing fixed to the first cylinder, and one end of a first suction pipe is fixed. Then, the first suction pipe is
One end of a second suction pipe connected to the second cylinder is formed by piercing a through hole parallel to the crankshaft at a predetermined position of the partition plate and arranged parallel to the rank shaft. This second suction pipe.
The second shaft is arranged in parallel with the rank shaft.
Position of the Linda facing the second suction pipe
And a communication portion communicating with the compression chamber .