JP2960148B2 - Horizontal rotary compressor - Google Patents

Description

The present invention relates to a horizontal rotary compressor, and more particularly, to a space-saving type in which a suction pipe is attached to an internal cylinder in parallel with a crankshaft. The present invention relates to a horizontal rotary compressor.

(Prior art) In general, in a two-cylinder type rotary compressor, as shown in FIG.
2 and 53 are connected so that refrigerant gas can be sent to each of the compression chambers 54 and 55 (see JP-A-63-38691). At this time, the suction pipes 52 and 53 are connected to the cylinders 50 and 51 by projecting from the casing 57 so as to be orthogonal to the crankshaft 56 of the compressor. Furthermore, the compression chambers 54, 55 and the suction pipe 5
Through holes 58 and 59 for communicating with 2 and 53 are formed.

In recent years, a type in which a rotary compressor is placed horizontally has been developed for saving space.

Even with this type, if the suction pipe projects sideways from the casing and is joined, a large occupied space is required when the compressor is grounded.

Therefore, as shown in FIG. 6, the suction pipe 52 of the horizontal rotary compressor is disposed on the end face of the casing 57, and the two cylinders 50 and 51 are connected to the partition plate via the sub bearing 60.
There has also been proposed a rotary compressor in which a through hole 62 penetrates through 61 (see Japanese Utility Model Application Laid-Open No. 58-57589). According to this suction structure, since the suction pipe does not protrude to the side of the casing, the outdoor unit and the like can be made compact.

(Problems to be Solved by the Invention) However, in the suction structure of the horizontal rotary compressor described above, the gas passage must be machined so as to communicate the two cylinders, and, for example, reference numerals 63, 6 in FIG.
As shown in 4, each cylinder must be machined with a suction hole orthogonal to the through hole and open to the compression chamber of the cylinder.
Furthermore, when this suction hole is formed from the outer peripheral surface side of the cylinder, there is a problem that the processing operation becomes complicated, for example, it is necessary to close the suction hole on the outer peripheral side from the through hole.

Further, since the rigidity of the cylinder is reduced when the gas passage is formed, the cylinder may be deformed at the time of tightening, which may hinder smooth rotation of the roller.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a horizontal rotary compressor that solves the above-mentioned problems of the conventional technology and saves space and has a highly rigid cylinder.

[Configuration of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention relates to a horizontal rotary compressor provided with two cylinders and placed horizontally so that a crankshaft is horizontal. Drill a through hole parallel to the shaft,
A suction pipe is connected to the through hole, and a long hole is formed in the cylinder partition plate, one end of which is open to the through hole and the other end of which is open to the compression chambers of both cylinders. And the inside of the cylinder are communicated with each other.

(Operation) According to the present invention, a through hole is formed in one of the cylinders in the rotary compressor in parallel with the crankshaft, one end of the suction pipe is fixed to the through hole, and a long hole is formed in the cylinder partition plate. Since the through hole communicates with the inside of the cylinder through the long hole, the gas is supplied to the two cylinders through the long hole of the partition plate without forming a complicated gas passage inside the cylinder. can do.

(Embodiment) An 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,
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 the casing 1
And a rotor 6 formed around the rotating shaft 5 so as to face the stator 4 inside the stator 4. 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 main bearing 7 and a sub bearing 8. The main bearing 7 is fixed to the inner surface of the casing 1 so as to be held at the axial center position of the casing 1. Further, two crank portions 9 and 10 are formed on a part of the rotating shaft 5 between the main bearing 7 and the sub bearing 8. The two cylinders 1 are located at opposing positions on the outer periphery of the crank portions 9 and 10.
1 and 12 are arranged so as to be sandwiched between the main bearing 7 and the sub bearing 8. A partition plate 13 is interposed between the two cylinders 11 and 12, and the cylinders 11 and 12 and the partition plate 13 are fixed by through bolts 14.

Further, ring-shaped rollers 15, 16 are fitted around the outer circumference of the crank portions 11, 12. The rollers 15 and 16 rotate eccentrically with the rotation of the rotation shaft 5.

On the other hand, a flat plate-shaped blade (not shown) is mounted on a part of the cylinders 11 and 12 toward the center of the rotation shaft. It comes into contact with the surface. The blade reciprocates due to the eccentric rotation of the rollers 15 and 16. At this time, a closed space surrounded by the blades, the rollers 15 and 16 and the cylinders 11 and 12 hermetically seals the compression chamber 18, and the change in volume of the compression chamber 18 compresses and discharges gas. Can be performed.

Further, a lubricating oil is stored in the casing in order to prevent abrasion in the blade sliding portion and maintain smooth rotation of the electric motor. This lubricating oil can be supplied to the sliding portion via the oil pipe 19 by a pump action by the reciprocating motion of the blade. The lower end of the oil pipe 19 is attached to a mounting plate 20 arranged on the outer periphery of the sub bearing 8 and fixed to the outer surface of the cylinder 12.

Further, a through hole 21 is formed in the mounting plate 20 near the position of the oil pipe 19 in a direction parallel to the rotating shaft 5.
A through hole 22 is also formed at a cylinder position on an extension of the through hole 21. An end of a suction pipe 23 is fixed to one end of a through hole 22 of the cylinder 12 through an attachment plate 20 of the oil pipe 19.

Further, a long hole 13a is formed in the lower part of the partition plate 13 facing the through hole 22 as shown in FIG. The long hole 13a communicates with the through hole 22 at its lower end 13b, and the upper end 13
c communicates with the compression chamber 18 inside the cylinders 11, 12. Therefore, the refrigerant gas sent through the suction pipe 23 can be sent to the compression chambers 18 of both cylinders 11 and 12 via the through hole 22 of the cylinder 12 and the long hole 13. The main bearing 7 and the sub bearing 8
Is provided with a compression chamber discharge port 26 having a discharge valve 24 and a muffler 25.

Here, a detailed structure of the suction pipe 23 and the gas passage will be described.

FIG. 3 (a) shows a structure in which the suction pipe 23 is press-fitted and fixed to the cylinder 12, and the tip of the tapered suction pipe 23 is press-fitted into the inside of the cylinder having a tapered surface. . In FIG. 2B, the cylinder has an enlarged-diameter hole 12a formed therein, and the pipe end 23a of the suction pipe 23 is engaged with the enlarged-diameter hole 12a so that the pipe portion on the outer surface of the cylinder is swaged. The structure which adheres to a cylinder is shown. At this time, a slight gap is provided between the mounting plate and the mounting plate, so that heat conduction between the members is blocked.

FIG. 4 (a) shows taper portions 11a and 12a provided on the surface of the cylinder facing the partition plate, and a gas flow for reducing the flow path resistance so that the gas is smoothly introduced into the compression chamber into the cylinder. The road structure is shown. According to this structure, the gas can flow while diffusing in the long hole.
FIG. 2B shows a structure in which a corner of the cylinder on the compression chamber side is chamfered so as to obtain the same effect. By the chamfers 11b and 12b, the gas flow can be locally diffused at the end of the long hole.

〔The invention's effect〕

As is apparent from the above description, according to the present invention, a through hole is formed in one of the cylinders in the rotary compressor, and one end of the suction pipe is fixed to the through hole, and a long hole is formed in the cylinder partition plate. Since the through hole communicates with the inside of the cylinder through the elongated hole, there is an effect that the gas can be reliably supplied to the two cylinders with a simple structure.

[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 front view of a partition plate, and FIGS. 3 (a) and 3 (b) show a state of fixing a suction pipe according to the present invention. FIG. 4 is a partial cross-sectional view showing an example of a gas flow path structure according to the present invention, and FIG.
5 and 6 are cross-sectional views showing one example of a conventional rotary compressor. 1 ... casing, 2 ... electric motor part, 3 ... compressor part,
4 ... stator, 5 ... rotary shaft, 6 ... rotor, 7 ...
Main bearing, 8 ... Sub bearing, 9, 10 ...
Crank part, 11, 12 …… Cylinder, 13 …… Partition plate, 18…
... compression chamber, 19 ... oil pipe, 20 ... mounting plate,
21,22 ... Through-hole, 23 ... Suction pipe.

Claims (1)

(57) [Claims] 1. A horizontal rotary compressor comprising two cylinders and having a horizontal crankshaft, wherein a through-hole is formed in one of the cylinders in parallel with the crankshaft. Along with connecting the suction pipe, the cylinder partition plate is formed with an elongated hole having one end opened to the through hole and the other end opened to the compression chambers of both cylinders. A horizontal rotary compressor characterized by communicating with