JP2526028Y2 - Rotary compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a rotary compressor, and more particularly to a rotary compressor for securing a lubricating oil level of a rotary compressor used for an air conditioner for an automobile.

[Conventional technology]

The rotary compressor has a rotor shaft in which a vane is slidably fitted in a groove formed in a substantially radial direction with respect to a cylindrical center, and the rotor shaft is fitted around an elliptical cylinder chamber inside the cylinder. The fluid is sucked and compressed by the suction chamber and the compression chamber which move while expanding and contracting in the rotation direction of the rotor shaft in the cylinder chamber by rotating the vane while making contact with the inner surface at least at one point or more. For example, it is used as a rotary compressor for an air conditioner for an automobile that sucks and compresses a refrigerant gas or the like and feeds it.

Further, as disclosed in Japanese Utility Model Laid-Open No. 62-137393, a mesh plate is mounted on the upper surface of the cylinder and a partition plate is mounted on the lower surface, and a plurality of small holes are formed in the partition plate. Some were set up.

Further, as disclosed in Japanese Utility Model Application Laid-Open No. 63-42889, the partition plate is formed into a cup shape with a plate-shaped body and a cylinder provided at the outer edge of the plate-shaped body, and this cylinder is lowered to a lower portion. There has been a hermetic compressor that is located close to the inside of an airtight container having an oil reservoir in which oil is stored.

[Problems to be solved by the invention]

By the way, in the conventional rotary compressor, the fluctuation of the oil level of the lubricating oil in the high-pressure chamber is suppressed by one oil level securing unit.

As a result, when the high-pressure chamber is disturbed by the refrigerant or the lubricating oil, one oil level securing unit is insufficient, and the lubricating oil level cannot be secured, and the lubricating oil is circulated to the rotor shaft. The efficiency is reduced, the mechanical loss of the rotary compressor is increased, and the refrigeration capacity is reduced, which is disadvantageous in practical use.

[Purpose of the invention]

Therefore, the purpose of this invention is to secure the oil level of the lubricating oil in the high-pressure chamber, reduce the mechanical loss of the rotary compressor, improve the refrigerating capacity of this rotary compressor, and improve the performance of the rotary compressor. Is to realize a rotary compressor capable of sufficiently exhibiting the above-mentioned characteristics.

[Means for solving the problem]

In order to achieve this object, the present invention provides a rotary compressor in which a cylinder chamber is divided into two by vanes to form a suction chamber and a compression chamber, and is surrounded by a rear block and a case portion of the rotary compressor. A first oil level securing section is provided in the case section toward the rear block side to secure an oil level of the lubricating oil in the high-pressure chamber, and the case section is provided in the rear block located below the first oil level securing section. A second oil level securing portion is provided toward the side, an oil reservoir is provided in the case portion below the rear block between the high-pressure chamber and the lubricating oil passage provided in the rear block, and the oil reservoir and the oil reservoir are provided. A throttle formed by a lower corner of the rear block and a bottom surface of the case is provided between the high pressure chambers.

[Action]

With the above-described configuration, when the rotary compressor is operated, the mixture of the high-pressure fluid and the lubricating oil flows from the cylinder chamber into the high-pressure chamber surrounded by the rear block and the case, and the high-pressure fluid and the lubricating oil are mixed. Separated with oil.

When the lubrication in the high-pressure chamber is disturbed by the high-pressure fluid, the disturbance is suppressed by the first and second oil level securing units to secure the oil level of the lubricating oil.

The throttle between the high-pressure chamber and the oil reservoir below the rear block prevents the lubricating oil that has entered the oil reservoir from being disturbed.

In addition, the oil sump and throttle below the rear block
By being covered by the second oil level securing portion facing the case portion provided on the rear block, disturbance of the high-pressure chamber is hardly transmitted.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 show an embodiment of the present invention. In FIGS. 1 and 2, reference numeral 2 denotes a rotary compressor. This rotary compressor 2 has a rotor shaft 4 and a cylinder 6. The cylinder 6 has an elliptical cylinder chamber 6a inside.
Are formed.

The rotor shaft 4 is an inner peripheral surface of the cylinder chamber 6a.
At least one, e.g., two, contacts 6b, and is rotatably provided to have the same center as the cylinder 6. In this rotor shaft 4, a plurality of, for example, three grooves 8 are formed at substantially equal intervals in the radial direction with respect to the center of the rotor shaft 4, and a vane 10 is formed in these grooves 8 in the cylinder chamber 6a. It is fitted so as to be able to appear and disappear toward the inner peripheral surface 6b.

The cylinder chamber 6a is provided with a suction chamber 14 on the side of the suction passage 12 formed in the cylinder 6 by the vane 10 and a discharge passage 16
And a compression chamber 18 on the other side.

The suction passage 12 communicates with a suction hole 20, and the discharge passage 16 communicates with a discharge hole 24 via a high-pressure chamber 22.

The high-pressure chamber 22 is surrounded by a rear block 26 and a case 28, and a lubricating oil separating device 30 for separating refrigerant gas and lubricating oil is provided inside the high-pressure chamber 22.

Further, as shown in FIG. 1, the case block 28 is provided with a rear block in the high-pressure chamber 22 in order to secure a lubricating oil level in the high-pressure chamber 22.
A first oil level securing section 32 facing the 26 side is provided, and a second oil level securing section 34 located below the first oil level securing section 32 is provided on the rear block 26 toward the case section 28 side.

Further, as shown in FIG. 1, an oil reservoir 38 is formed between the lubricating oil passage 36 provided in the rear block 26 and the high-pressure chamber 22, that is, a second oil level securing portion 34 is provided. An oil reservoir 38 is formed in the case 28 below the rear block 26 provided. The high-pressure chamber 22 and the oil reservoir 38 are
The passage section formed by the corner portion 26a below the rear block 26 provided with the oil level securing portion 34 and the bottom surface portion of the case portion 28 is communicated with the throttle diaphragm portion 40 having an extremely small sectional area. As described above, the oil reservoir 38 and the throttle 40 are provided below the second oil level securing section 34 and are covered by the second oil level securing section 34.

Reference numeral 42 denotes a lubricating oil guide groove provided on the bottom surface of the case 28 to send the lubricating oil in the high-pressure chamber 22 to the oil reservoir 38, and 44 denotes a check valve provided in the middle of the discharge passage 16. is there.

 Next, the operation will be described.

When the rotary compressor 2 is operated, a mixture of the refrigerant gas and the lubricating oil, which is a high-pressure fluid, is fed from the cylinder chamber 6a to the high-pressure chamber 22, and the refrigerant oil and the lubricating oil are separated by the lubricating oil separating device 30. Is separated into

The separated refrigerant gas is supplied to the condenser (not shown) from the discharge hole 24, and the lubricating oil flows from the bottom portion of the high-pressure chamber 22 into the oil reservoir 38 by the lubricating oil guide groove 42, and passes through the lubricating oil passage 36. It is supplied to the bearing portion of the rotor shaft 4 of the rotary compressor 2.

Also, even when the inside of the high-pressure chamber 22 is disturbed by the refrigerant gas, the first and second oil level securing units 32 and 34 suppress the disturbance and secure the oil level of the lubricating oil in the high-pressure chamber 22. The throttle portion 40 prevents the lubricating oil in the oil reservoir 38 from being disturbed.

Further, the oil sump 38 and the throttle 40 are connected to the first oil level securing unit 32.
By being covered by the second oil level securing portion 34 provided on the rear block 26 at a position lower than the case toward the case portion 4 side, the disturbance of the lubricating oil in the high-pressure chamber 22 is hardly transmitted.

Thereby, it is possible to secure the oil level of the lubricating oil in the high-pressure chamber 22 and to reliably circulate the lubricating oil to a predetermined lubricating portion,
The mechanical loss of the rotary compressor 2 can be reliably reduced, which is practically advantageous.

Further, by reducing the mechanical loss of the rotary compressor 2, the refrigerating capacity of the rotary compressor 2 is improved, and the performance of the rotary compressor 2 can be sufficiently exhibited.

Furthermore, since the wear of the rotor shaft 4 and the like due to the mechanical loss of the rotary compressor 2 can be reliably reduced,
The service life of various parts of the rotary compressor 2 can be extended, which is economically advantageous.

[Effect of the invention]

As described above in detail, according to the present invention, the case portion is directed toward the rear block to secure the oil level of the lubricating oil in the high-pressure chamber surrounded by the rear block and the case portion of the rotary compressor. A first oil level securing section is provided, and a second oil level securing section is provided on the rear block located below the first oil level securing section toward the case section side, and lubrication is provided on the high pressure chamber and the rear block. An oil reservoir is provided in the case portion below the rear block between the oil passage and an oil reservoir formed between the oil reservoir and the high-pressure chamber by a corner portion below the rear block and a bottom portion of the case portion. Since the throttle portion is provided, the first and second oil level securing portions can suppress the disturbance of the lubricating oil in the high pressure chamber, and the throttle portion disturbs the lubricating oil in the oil reservoir due to the disturbance of the lubricating oil in the high pressure chamber. Can be prevented, It can be difficult to transmit disturbances in the high pressure chamber to the oil reservoir portion and the diaphragm portion by 2 hydraulic securing unit.

For this reason, this rotary compressor can secure the oil level of the lubricating oil in the high-pressure chamber, can reliably circulate the lubricating oil, can reduce the mechanical loss of the rotary compressor, and is practically advantageous. In addition, by reducing the mechanical loss of the rotary compressor, the refrigerating capacity of the rotary compressor can be improved, and the performance of the rotary compressor can be sufficiently exhibited.

[Brief description of the drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 is a partially cutaway sectional view of a rotary compressor, and FIG. 2 is a schematic sectional view of the inside of a cylinder of the rotary compressor. In the figure, 2 is a rotary compressor, 4 is a rotor shaft, 6
Is a cylinder, 8 is a groove, 10 is a vane, 12 is a suction passage, 14
Is a suction chamber, 16 is a discharge passage, 18 is a compression chamber, 20 is a suction hole, 22
Is a high pressure chamber, 24 is a discharge hole, 26 is a rear block, 28 is a case portion, 30 is a lubricating oil separating device, 32 is a first oil level securing portion, 34 is a second oil level securing portion, 36 is a lubricating oil passage, 38 is an oil reservoir, 40 is a throttle, 42 is a lubricating oil guide groove, and 44 is a check valve.

Claims (1)

(57) [Scope of request for utility model registration] In a rotary compressor in which a suction chamber and a compression chamber are formed by dividing a cylinder chamber into two parts by vanes, lubricating oil in a high-pressure chamber surrounded by a rear block and a case of the rotary compressor. A first oil level securing section facing the rear block is provided in the case section to secure a surface, and a second oil level securing toward the case section is provided in the rear block below the first oil level securing section. An oil reservoir is provided in the case section below the rear block between the high-pressure chamber and the lubricating oil passage provided in the rear block, and the rear block is provided between the oil reservoir and the high-pressure chamber. A rotary compressor provided with a throttle portion formed by a lower corner portion and a bottom portion of the case portion.