JPH04153590A - Scroll type compressor - Google Patents

Abstract

PURPOSE:To reduce the consumption of oil and prevent the mixing of foreign materials into a sliding part by forming an oil feeding hole for allowing an oil feeding pipe to communicate to an oil reservoir part and an oil discharge hole for discharging the oil in the upper part of the partitioning plate to the oil reservoir part, at the center of the partitioning plate and covering the upper surface except the oil feeding hole by a metal net. CONSTITUTION:The discharged coolant gas is introduced into the upper part of an electric motor 3, passing through a passage 1a. A portion of the lubricating oil contained in the coolant gas is separated from the coolant gas and flows down to the lower part of the electric motor 3, and returns into an oil reservoir part 4, passing through the oil discharge hole 21 on a partitioning plate 18. In this case, the lubricating oil is separated from the foreign materials by a metal net 18b covering the upper surface of the partitioning plate 18, and further the mixing with the coolant gas is prevented. Further, a portion of the coolant gas is introduced into the lower part of the electric motor 3. When the coolant gas introduced into the lower part of the electric motor 3 passes through the space between the partitioning plate 18 of the electric motor 3, the lubricating oil is separated by the metal net 18b covering the upper surface of the partitioning plate 18. The separated lubricating oil is separated from the foreign materials by the metal net 18b and passes through an oil discharge hole 21 on the partitioning plate 18, and is returned into the oil reservoir part 4.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a scroll compressor used as a refrigerant compressor or an air compressor for refrigeration and air conditioning, cold storage, storage, etc., and relates to a scroll compressor that ensures high reliability. This is related to preventing foreign matter from entering sliding parts and reducing the amount of oil coming up.

[Conventional technology] Conventional F! The mounting plate was a partition plate for preventing oil agitation as described in Japanese Patent Application No. 63-23004.

[Problem to be solved by the invention]

In the conventional technology, there is a problem in that the lubricating oil on the two surfaces of the oil agitation prevention partition plate is remixed with the refrigerant gas before being returned to the oil sump, increasing the amount of oil coming out.

Further, since no consideration was given to trapping foreign matter, there was a problem in that foreign matter accumulated in the oil reservoir, was sucked into the oil supply system r, and was supplied to the sliding parts and the like.

An object of the present invention is to provide a partition plate for preventing oil agitation, which reduces oil spillage and prevents foreign matter from entering the sliding portion l\.

[Means to solve the problem]

In order to achieve the above object, a dividing plate is provided in the lower part of the compressor airtight container to separate the oil sump from another space, and a refueling hole is provided in the center of the dividing plate to communicate the oil supply device with the oil sump. An oil drain hole is provided in the dividing plate to drain the lubricating oil from the upper part of the dividing plate into an oil reservoir, and the upper surface of the dividing plate except for the oil supply hole is covered with a wire mesh to prevent foreign matter from entering the oil supply hole. The amount of oil supplied is raised to prevent it from entering the reservoir.

[Effect]

The lubricating oil sucked up from the oil reservoir and lubricating each bearing and the scroll sliding part is mixed with the compressed refrigerant gas and discharged from the central discharge port of the fixed scroll into the space above the compressor section. The discharged refrigerant gas is guided to the top of the electric motor. Here, a portion of the lubricating oil contained in the refrigerant gas is separated from the refrigerant gas, falls to the lower part of the motor, and returns to the oil sump through the oil drain hole in the dividing plate. At this time, the wire gauze covering the upper surface of the dividing plate separates the foreign matter from the foreign matter and further prevents remixing with the refrigerant gas. Also, some of the refrigerant gas is guided to the bottom of the motor. When the refrigerant gas led to the lower part of the motor passes through the space between the lower part of the motor and the dividing plate, lubricating oil is separated from the refrigerant gas by a wire mesh covering the upper surface of the dividing plate.

The separated lubricating oil is separated from foreign matter by the wire mesh and returned to the oil sump through the support plate and the oil discharge hole.

Therefore, it is possible to promote the separation of lubricating oil from the refrigerant gas, and to prevent foreign matter from entering the oil sump, that is, to prevent foreign matter from entering the sliding parts, ensuring good oil supply to the sliding parts of each part of the compressor. can be done.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. 6. FIG. 1 is a longitudinal sectional view of a scroll compressor embodying the present invention, and FIG. 2 shows an embodiment of a partition plate according to the present invention.

In FIG. 1, a compressor section 2 is disposed above an airtight container 1, and an electric motor 3 is disposed below.

Further, an oil reservoir 4 for lubrication is formed at the bottom of the closed container 1. The compressor section 2 has a spiral wrap 5 on the base plate.
a, an orbiting scroll 6 having a spiral wrap 6a on the base plate, and a frame 7 that is integrated with the fixed scroll 5 and supports the orbiting scroll 6, It has a structure in which the wraps of the orbiting scroll 6 are engaged with each other.

Also, between the orbiting scroll 6 and the frame 7.

An Oldham mechanism 8 is provided to prevent rotation of the orbiting scroll 6. The electric motor 3 is press-fitted into the closed container 1,
The orbiting scroll 6 is caused to orbit through the crankshaft 9. The crankshaft 9 is supported by a main bearing 10 and a lower bearing 11 provided on the frame 7, and the crank pin is supported by an orbiting bearing 12 provided on the back surface of the orbiting scroll 6.
It is mated with.

Inside the crankshaft 9 is a main bearing 10. An oil supply passage 13 is provided to guide lubricating oil to the lower bearing 11 and the swing bearing 12, and an oil supply device 14 is provided at the shaft end of the electric motor 3 to suck up lubricant oil from an oil reservoir 4 and send it to the oil supply passage 13. .

Furthermore, a partition plate 18 is provided at the bottom of the closed container 1 to separate the oil reservoir 4 from other spaces.

FIG. 2 shows the structure of the dividing plate 18. Split plate main body 18a
An oil supply hole 2 that connects the oil supply device 14 to the oil reservoir 4 at the center of the
0, and an oil discharge hole 21 is provided in the dividing plate main body 18a to return the lubricating oil on the upper part of the dividing plate 18 to the oil reservoir 4, and the upper surface of the dividing plate main body 18a except for the oil supply hole 20 is covered with wire mesh. 18b, and a rising portion 20a is provided in the oil supply hole 20 to prevent foreign matter from entering the oil reservoir from the oil supply hole 20.

In the compressor section 2, when the orbiting scroll 6 is caused to orbit through a crankshaft 9 activated by an electric motor 3, a space (compression chamber) formed by the orbiting scroll 6 and the fixed scroll 5 moves toward the center of the scroll. The refrigerant gas sucked from the suction pipe 19 is compressed by decreasing the volume as the refrigerant gas increases. The compressed refrigerant gas is discharged from a discharge port 16 provided at the center of the base plate of the fixed scroll to an upper space 17 within the closed container.

Furthermore, an intermediate pressure chamber 15 is formed on the back surface of the orbiting scroll to which gas for the compression stroke is guided.

The pressure in the intermediate pressure chamber 15 is between the suction pressure and the discharge pressure of the refrigerant gas, and the orbiting scroll 6 is pressed against the fixed scroll 5 by this intermediate pressure. Lubricating the sliding parts of both scrolls is performed using the differential pressure between the discharge bath pressure and the pressure in the intermediate pressure chamber 15. Lubricating oil is provided by oil supply device 14
It passes through the oil supply passage 13 and the main bearing 10. lower bearing 11,
After lubricating the orbiting bearing 12, it flows into the compression chamber via the intermediate pressure chamber 15, and is mixed with refrigerant gas and discharged from the discharge port 16 provided in the center of the fixed scroll 5 into the upper space 17 in the closed container 1. do.

The discharged refrigerant gas is guided to the upper part of the electric motor 3 through the passage 1a. Here, a part of the lubricating oil contained in the refrigerant gas is separated from the refrigerant gas, falls to the lower part of the electric motor 3, and returns to the oil sump 4 through the oil discharge hole 21 of the dividing plate 18. At this time, the lubricating oil is separated from foreign substances by the wire mesh 18b covering the upper surface of the partition plate 18, and furthermore, remixing with the refrigerant gas is also prevented. or.

A part of the refrigerant gas is guided to the lower part of the electric motor 3. Electric motor 3
When the refrigerant gas guided to the lower part of the electric motor 3 passes through the space between the dividing plate 18 and the dividing plate 18, the lubricating oil is separated from the refrigerant gas by the wire mesh 18b covering the upper surface of the dividing plate 18. The separated lubricating oil is further separated from foreign matter by the wire mesh 18b, and is returned to the oil reservoir 4 through the oil discharge hole 21 of the dividing plate 18.

Therefore, in the scroll compressor according to the present invention, separation of the lubricating oil from the refrigerant gas can be promoted and foreign matter can be prevented from entering the oil sump 4, so that the sliding parts of each part of the compressor can be well supplied with oil.

〔Effect of the invention〕

As is clear from the above description, the scroll compressor according to the present invention can promote the separation of lubricating oil from refrigerant gas, reduce oil spillage, and prevent foreign matter from entering the oil sump. Provides good lubrication to the sliding parts.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a scroll compressor showing an embodiment of the present invention, FIG. 2 is a plan view of a dividing plate, and FIG. 3 is a longitudinal sectional view of the dividing plate. DESCRIPTION OF SYMBOLS 1... Airtight container, 2... Compressor part, 3... Electric motor, 4... Oil sump part, 5... Fixed scroll, 6... Orbiting scroll, 9... Crankshaft, 18...・・Split plate,
18b... Gold wheel diagram nest diagram A-ρ-A

Claims (1)

[Claims] 1. comprising a compressor section consisting of a pair of scrolls that rotate relative to each other, an electric motor that drives the compressor section, and an airtight container that houses them, the compressor section being provided above the electric motor, A lubricating oil reservoir is provided in the space at the bottom of the sealed container below the motor, and the lubricating oil in the oil reservoir is sucked into each sliding part through an oil supply pipe connected to the lower end of the motor shaft. In a scroll compressor configured to be oiled, a dividing plate is provided at the bottom of the airtight container to separate an oil sump from another space, and a lubrication hole is provided in the center of the dividing plate to communicate the oil supply pipe to the oil sump. ,
A scroll compressor characterized in that the dividing plate is provided with an oil discharge hole for discharging oil from the upper part of the dividing plate to an oil reservoir, and the upper surface of the dividing plate except for the oil supply hole is covered with a wire mesh.