JPH0674181A - Horizontal rotary compressor - Google Patents

Abstract

PURPOSE:To prevent liquid from being compressed without requiring any expensive and complicated mechanism in a reliable oil supply device without liquid compression in a refrigerating cycle of a refrigerator, etc. CONSTITUTION:A horizontal rotary compressor is composed of a coil spring 15 fixed to one end of a crankshaft 6 and an oil pipe 13 which houses the coil spring, to one end of which a support part is fixed, and the other end of which is open into oil.

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 used in a refrigerating device such as a refrigerator and a refrigerator.

[0002]

2. Description of the Related Art A conventional horizontal rotary compressor will be described below with reference to the drawings.

4 to 6 are shown in Japanese Patent Application Laid-Open No. 57-146075.
The horizontal rotary compressor shown in Japanese Patent Publication No.
Reference numeral 1 is a refrigerant compressor body, and an electric motor unit 3 and a rotary type compression mechanism unit 4 are integrally housed in a sealed case 2.

Reference numeral 3a is a stator of an electric motor, which is press-fitted and fixed in the closed case 2. 3b is a rotor. Reference numeral 5 is a main bearing 5 that supports a crankshaft 6 press-fitted into the rotor 3b.
It is a side plate integrally having a. The side plate 5 is lightly press-fitted into the closed case 2 and then fixed by welding or the like. Reference numeral 7 is a cylinder plate for housing the rotary piston 8 provided on the eccentric portion 6a of the crankshaft 6. Reference numeral 9 is a side plate integrally having a bearing 9a that supports the crankshaft 6.

The side plate 5, the cylinder plate 7, and the side plate 9 described above are integrated by a bolt 10 to define a compression chamber 11. 12 is the compression chamber 1
A vane 1 divides 1 into a high pressure side and a low pressure side, and 12a is a vane spring. Reference numeral 13 denotes a spring guide that is fastened to the bearing 9a together with the bolt 10, and includes a mounting base 13a fitted to the bearing 9a and an oil pipe 13b curved downward. The upper end of the oil pipe 13b is connected to the opening 13c provided concentrically with the crankshaft 6 of the mounting base 13a, and the lower end is immersed in the oil 14 stored under the sealed case 2.

Reference numeral 15 denotes a coil spring screwed and fixed to a threaded portion 6b formed at the end of the crankshaft 6, which extends into the oil pipe 13b from the opening 13c and has a conical narrowed portion 15a at the tip. ing. The coil spring 15 is formed of a non-circular wire having a substantially trapezoidal cross section as shown in FIGS.
Oil 1 between the inner wall of b and the outer peripheral surface of the coil spring 15
The spaces a, a ', a "for storing 4 are increased as compared with the case of the circular shape shown by the chain double-dashed line in FIG.

Reference numeral 16a is a hydraulic chamber defined by the mounting base 13a and the end surface of the crankshaft 6. Reference numerals 6c, 6d and 6e denote oil grooves provided on the outer peripheral surface of the crankshaft 6 facing the bearing 9a, the rotary piston 8 and the main bearing 5a, respectively. Reference numeral 16 denotes a discharge valve provided on the sub side plate. 18 is a side plate 9 and a cup-shaped discharge cover 1
7 is a partition plate interposed between the pipes, and the partition plate 18 serves to connect the cup-shaped portion of the discharge cover 17 to the discharge chamber 1.
It is formed as 7a. Further, 17 is a discharge pipe for guiding the discharge gas to a refrigeration cycle (not shown), and 8 is a suction pipe directly communicating with the compression chamber 11.

[0008]

However, in the above-mentioned configuration, in the horizontal rotary compressor having no low pressure side intake valve, the liquid refrigerant 1 condensed by the cooler (not shown) is used.
At 4b, the suction pipe 18 in the compressor 1 at the time of starting is cooled,
The high-pressure refrigerant in the compressor 1 is liquefied on the pipe surface and drops into the oil 14 in the compressor. The rotation of the rotor 3 includes a coil spring 15 fixed to the crankshaft 6 and a discharge cover 17b on the side plate 9, and an oil pipe 13 integrally fixed to the oil pipe 14 and a liquid refrigerant 14b. Oil is sequentially supplied to the crankshaft 6 by the reeds, leading to liquid compression.

In view of the above problems, the present invention provides a highly reliable horizontal rotary compressor in which the refrigerant does not liquefy on the surface of the suction pipe.

[0010]

In order to solve the above-mentioned problems, the horizontal rotary compressor of the present invention is provided with a large number of small holes in the oil pipe, and the inner wall of the oil pipe is filled with oil by utilizing the leads of the coil spring. The liquid refrigerant is transferred. Further, the tip end of the coil spring is extended to form a chamoji for stirring to improve the compatibility of the liquid refrigerant in the oil.

[0011]

According to the present invention, with the above construction, the oil and the liquid refrigerant are separated in the course of refueling, and the liquid refrigerant having a low specific gravity is discharged to the outside of the oil supply pipe. In addition, the liquid refrigerant is not directly sucked.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The same parts as those in the conventional example will be described using the same reference numerals, and the same parts in the configuration and operation will be omitted.

FIG. 1 is a sectional view of a horizontal rotary compressor according to an embodiment of the present invention, and FIG. 2 is a side view thereof. In FIG.
When the electric motor section 3 is energized and the rotor 3b rotates,
The crankshaft 6 rotates, the rotation of the rotary piston 8 compresses the refrigerant gas sucked from the suction pipe 18 into the compression chamber 11, and is once discharged into the closed container case 2 through the discharge valve (not shown). It is sent to the refrigeration cycle through the discharge pipe 17.

On the other hand, the rotation of the crankshaft 6 simultaneously rotates the coil spring 15 in the oil pipe 13b. By this rotation, the spaces between the outer side surfaces of the coil spring 15 in the oil pipe 13b and the inner wall of the oil pipe 13b are sequentially a,
The coil spring 15b spirally rises along the leads of the coil spring 15b and reaches the hydraulic chamber 16 as indicated by a'and a ".

After that, the oil in the hydraulic chamber 16 passes through the oil grooves 6c, 6d and 6e to lubricate the bearing 9, the rotary piston 8 and the main bearing 5a, respectively.

In the spaces a, a ', a ", however, the linear cross section of the coil spring 15b is made non-circular, and the space 2'in FIG.
The volume of the space a is made larger than that of the circular one shown by the dotted line, and the amount of oil supply can be increased and the wire rod cross-sectional area of the coil spring is smaller than that of the circular one with the same space volume. As a result, the lateral rigidity of the coil spring itself can be reduced, and even if an oil pipe having a strong curvature table is used, the motor input does not increase due to the increase in lateral rigidity.

[0017]

As described above, according to the present invention, a large number of small holes are formed in the oil pipe, and the oil and the liquid refrigerant are transferred to the inner wall of the oil pipe by using the leads of the coil spring. The liquid refrigerant is separated and the liquid refrigerant having a low specific gravity is discharged to the outside of the oil supply pipe.

Further, since the tip of the coil spring is extended to form a stirring chamoji to improve the compatibility of the liquid refrigerant in the oil, the liquid refrigerant is not directly sucked. It is possible to provide a highly reliable horizontal rotary compressor in which the suction pipe surface refrigerant is not liquefied.

[Brief description of drawings]

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

FIG. 2 is a sectional view of a compression element according to an embodiment of the present invention.

FIG. 3 is a sectional view of a compression element according to an embodiment of the present invention.

FIG. 4 is a sectional view of a conventional horizontal rotary compressor.

5 is a cross-sectional view of the main parts of the oil supply pump of FIG.

FIG. 6 is a cross-sectional view of the main parts of the fuel pump of FIG.

[Explanation of symbols]

 9 Sub-side plate 13 Oil pipe 13b Oil pipe small hole 15 Coil spring 15b Coil spring tip chamoji 16 Discharge valve 17b Discharge cover

Claims (3)

[Claims] 1. An oil stored in a closed container, an electric element composed of a stator and a rotor, a compression element, a crankshaft having an eccentric portion of the compression element, and a compression chamber concentric with the rotation center of the crankshaft. A cylinder to be formed, a rotary piston fitted in the eccentric portion and rolling in the compression chamber, a vane that presses against the rotary piston to partition the compression chamber into a high pressure side and a low pressure side, and a cylinder of the cylinder. A main side plate on the side of an electric element that seals both side surfaces and axially supports the crankshaft, a discharge valve provided on the side of the sub side plate opposite to the cylinder surface, and the sub side plate so as to cover the discharge valve. A discharge cover fixed to the crankshaft and an oil supply pump provided on the opposite side of the crankshaft from the motor. The oil supply pump is a coil spring fixed to one end of the crankshaft. And a coil spring that accommodates the coil spring, fixes a support portion at one end, and has an oil pipe that opens into the oil at the other end, and has a large number of small holes on the wall of the oil pipe. Horizontal rotary compressor. 2. An oil stored in a hermetic container, an electric element composed of a stator and a rotor, a compression element, a crankshaft having an eccentric portion of the compression element, and a compression chamber concentric with the rotation center of the crankshaft. A cylinder to be formed, a rotary piston fitted in the eccentric portion and rolling in the compression chamber, a vane that presses against the rotary piston to partition the compression chamber into a high pressure side and a low pressure side, and a cylinder of the cylinder. A main side plate on the side of an electric element that seals both side surfaces and axially supports the crankshaft, a discharge valve provided on the side of the sub side plate opposite to the cylinder surface, and the sub side plate so as to cover the discharge valve. A discharge cover fixed to the crankshaft and an oil supply pump provided on the opposite side of the crankshaft from the motor. The oil supply pump is a coil spring fixed to one end of the crankshaft. And a coil spring, the support part is fixed to one end, and the other end is provided with an oil pipe opening into the oil and a stirring chamoji at the tip of the coil spring opening into the oil. Horizontal rotary compressor characterized by. 3. The horizontal rotary compressor according to claim 2, wherein a large number of small holes are provided on the wall of the oil pipe of the oil supply pump.