JPS6153488A - Horizontal scroll compressor - Google Patents

Abstract

PURPOSE:To appropriately maintain level of oil which is accumulated inside a motor chamber and prevent oil from being stirred by arranging both the inlet port of gas flow passage which carries intake gas, that has passed through a motor, into the intake chamber of a compressing mechanism, and the lower end of a motor rotor at approximately equal level. CONSTITUTION:When level OL of oil 15 whch is accumulated inside a motor chamber 11 is raised over the lower end part of a motor rotor 7b, oil which is at a higher level than the gas inlet port 20a of a gas flow passage 20 that is approximately flush with the lower end part of the motor rotor 7a passes through the gas flow passage 20 and is induced into an intake chamber 2a together with refrigerant gas. The level of oil 15 inside the motor chamber 11 is therefore controlled to a constant level approximate to the lower part of the gas inlet port 20a. The oil will then not be stirred by the rotor 7b of a motor 7, therefore reducing stirring loss. And the sectional area of the passage of refregerant gas at the part of the motor 7 will not be reduced because the oil level is contolled to the position approximate to the lower part of the gas inlet port 20a, thereby preventing increase in input and reduction in volumetric efficiency.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a horizontal scroll compressor used in refrigerators and air conditioners, and particularly to a horizontal scroll compressor used in refrigerators and air conditioners. Concerning the structure of

[Background of the invention]

A conventional horizontal scroll compressor will be explained with reference to FIG.

In the figure, 1 is a closed chamber, and this closed chamber 1
The inner VC includes a pressure mechanism 2 that combines an orbiting scroll 3 with a thinly wound wrap and a fixed scroll 4, a frame 5 that supports the orbiting scroll 3, and an electric motor 7 that drives a main shaft 6 connected to the orbiting scroll 3. It is stored. In addition, the VC suction pipe 8 on the motor 7 side of the sealed chamber 1 and the discharge 1#9 on the compression mechanism 2 side are respectively attached, so that the area around the motor is a low-pressure suction gas atmosphere, and the back side of the fixed scroll is a high-pressure discharge gas atmosphere. It has a good atmosphere. A suction pipe 8 is attached to the fixed scroll 4 and the frame 5.
9. The suction gas flowing into the sealed chamber 1 is compressed by the compression mechanism 2.
A gas flow path 10 leading to the suction chamber 2a is provided. The gas introduction port 10a of this gas passage 10 is located above the axis of the main shaft 6.

Next, to explain the operation of the horizontal scroll compression 1, refrigerant gas returning from the evaporator side of the refrigeration cycle passes through the suction pipe 8 and reaches the electric motor room 11, which is in a low-temperature, low-pressure ambient atmosphere. In the motor room 11, which is a wide space, the flow rate of the refrigerant gas is greatly reduced, and the oil accompanying the refrigerant gas is automatically separated from the refrigerant gas and accumulates at the bottom of the motor room 11. The oil is separated nfC. After the refrigerant gas passes through the gap 12 between the stator 7a and rotor 7b of the electric motor 7 and the gap 13 between the stator 7a and the sealed chamber 1, the gas flow w! The suction of the compression mechanism 2 is led to 2aK by following rIO. The refrigerant gas that has entered the suction chamber 2a is caused by the revolving movement of the orbiting scroll 3, which is prevented from rotating, to the closed space 2 formed by both scrolls.
As the refrigerant gases b and 2c gradually contract and move to the center of the scroll, the pressure of the refrigerant gas is increased and the refrigerant gas is discharged through the central discharge hole 2d.

The discharged high-temperature, high-pressure refrigerant gas fills the space 14 in the sealed chamber 1 and is then guided to the outside via the discharge pipe 9. On the other hand, the oil 15 accumulated at the bottom of the motor compartment 11 is
It is used for cooling the electric motor 7 and for sliding each bearing that supports the main shaft 6. In the figure, reference numeral 16 indicates an Oldham mechanism that completely prevents the orbiting scroll 3, solid arrows indicate the flow of refrigerant gas, and dashed arrows indicate the flow of oil.

By the way, in the horizontal scroll compressor mentioned above,
tIiJ The oil level OL at the bottom 5 of the machine room may rise until the motor 70 and the rotor 7b are immersed. When the oil level rises in this way, oil agitation loss occurs due to the rotation of the motor 70 and the rotor 7b. In the figure, 17 indicates oil droplets that have been stirred by the rotor 7b. Further, as the oil level rises, the area of the refrigerant gas passage decreases, so the pressure loss when crossing the electric motor 7 increases. Therefore, due to these factors, conventional scroll compressors have problems of increased input power and decreased volumetric efficiency.

[Purpose of the invention]

The purpose of the present invention is to reduce the oil agitation loss caused by the motor and the pressure loss around the motor, thereby preventing an increase in input power and a decrease in volumetric efficiency, by maintaining the level of oil accumulated at the bottom of the motor room at an appropriate level. The objective is to provide a horizontal scroll compressor that can.

[Summary of the Invention] In order to achieve this object, the present invention provides a gas flow path which is provided over a fixed scroll and a frame and which guides the suction gas that has passed through the electric motor into the suction chamber of the compression mechanism. ,
It is characterized by being located at approximately the same height as the lower end of the motor rotor.

Further, in the present invention, the gas inlet of the gas passage is located at a higher position than the upper end of the motor rotor, and an oil passage leading to the oil and gas passage in the motor room is provided in the frame. The oil inlet of the IiI passage is located at approximately the same height as the lower end of the motor rotor, and the oil outlet is opened in the middle of the gas flow path, so that an ejector is configured in this part. .

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a longitudinal sectional view of a horizontal scroll compressor according to the present invention, and FIG. 2 is a sectional view taken along the line 8-- in FIG. In the figure, the same reference numerals as those in FIG. 4 indicate the same or equivalent elements, so the explanation thereof will be omitted.゛Inhaling the refrigerant gas that has passed through the electric motor 7 m28
A gas flow path 20 for 4< is bored across the fixed scroll 4 and the frame 5. A gas inlet 20a of the gas passage 20 is provided at approximately the same height as the lower end of the motor rotor 7a, and a gas outlet 20b communicates with the suction chamber 2a on the upper side. Further, in the middle of the gas flow path 20, there is a flow path portion that rises upward from the gas inlet 20a portion, a horizontal flow path portion that extends from the flow path portion toward the gas outlet 2Ub side, and a flow path portion that extends upward from the gas inlet port 20a, and It is formed by a flow path section falling downward toward the outlet port 20b. In the figure, reference numeral 21 denotes an oil supply hole that guides the oil accumulated in the motor chamber 11 to the oil supply passage 22 in the main shaft 6, and is bored across the fixed scroll 4 and the frame 5.

Since the present invention is configured as described above, when the oil level UL of the oil +'O accumulated in the motor chamber 11 rises above the lower end of the motor rotor 7b, the upper VC of the gas inlet 20a of the gas passage 20 The oil is guided to the suction chamber 2a through the gas flow path 20e together with the refrigerant gas. By this, 'formation I
jhThe level of oil 15 in the aircraft compartment 11 is always maintained at the gas inlet 2.
It is managed at a position near the bottom of 0a. Therefore, @
Since the rotor 7b of the machine 7 does not stir the oil, the stirring loss is reduced, and the oil level is controlled near the bottom of the gas tank 20a, reducing the refrigerant gas passage area in the motor part. Therefore, an increase in input power and a decrease in volumetric efficiency can be prevented.

Note that when the oil 15 in the motor chamber 11 is drawn into the suction chamber 202 through the gas flow path 202, a large amount of oil flows into the suction chamber 2 because a rising flow path is formed in the gas flow path 2U.
It will not move to a.

FIG. 3 shows another embodiment of the invention, in which the gas flow path 2
0 gas inlet 20at - provided at a higher position than the upper end of the motor rotor 7b;
An oil passage 23 is provided to guide the oil inside to the gas passage 2U, and the oil inlet 23a of the oil passage 23 is provided at approximately the same height as the lower end of the motor rotor 7b, and the oil outlet 23b is connected to the gas passage 2U. An opening is made in the middle of the flow path 20, and an ejector is configured in that part.

In this embodiment, the oil in the stain machine chamber 11 is transferred to the gas flow path 20 through the oil path 23 by the ejector action of the gas flow path 20.
0 to manage the oil level OL and prevent an increase in input and a decrease in volumetric efficiency.

〔Effect of the invention〕

As explained above, according to the present invention, by properly maintaining the level of oil accumulated in the motor chamber, it is possible to reduce the r-mount stirring loss due to 'a' pumping and the pressure loss around the motor, and to reduce the input It is possible to prevent the rise and decrease in volumetric efficiency.

[Brief explanation of the drawing]

1 and 2 show one embodiment of the present invention, FIG. 1 is a longitudinal sectional view of a horizontal scroll compressor according to the present invention, and FIG.
The figures are a sectional view taken along the line A-A in FIG. 1, FIG. 3 is a longitudinal sectional view of another invention, and FIG. 4 is a longitudinal sectional view of a conventional horizontal scroll compressor. 1... Sealed chamber 2... Compression mechanism 2a.
...Suction chamber 3...Orbiting scroll 4...Fixed scroll 5...Frame 6...Main shaft
7...Electric motor 7a...Stator 7b...
・Rotor 11...Motor room 1b...Oil 20
...Gas flow path 20a...Gas inlet 20b...
- Gas outlet 23...Oil passage 23a...Oil inlet 23b...Oil outlet.

Claims (3)

[Claims] 1. A compression mechanism that combines an orbiting scroll having a spiral wrap and a fixed scroll, a frame that supports the orbiting scroll, and an electric motor that drives a main shaft connected to the orbiting scroll are housed in a sealed chamber,
In addition, the back side of the fixed scroll is in a high-pressure discharge gas atmosphere, the area around the motor is in a low-pressure suction gas atmosphere, and the suction gas returning from the evaporator side is distributed between the gap between the rotor and stator of the motor and the gap between the stator and the sealed chamber. In a horizontal scroll compressor, the suction gas that has passed through the motor is collected in the bottom of the motor chamber. A gas flow path leading to the suction chamber of the compression mechanism is provided across the frame and the fixed scroll, and the gas inlet of the gas flow path is provided at approximately the same height as the lower end of the motor rotor. horizontal scroll compressor. 2. 2. The horizontal scroll compressor according to claim 1, wherein the gas flow path has a rising flow path portion in the middle thereof. 3. A compression mechanism that combines an orbiting scroll having a spiral wrap and a fixed scroll, a frame that supports the orbiting scroll, and an electric motor that drives a main shaft connected to the orbiting scroll are housed in a sealed chamber,
In addition, the back side of the fixed scroll is in a high-pressure discharge gas atmosphere, the area around the motor is in a low-pressure suction gas atmosphere, and the suction gas returning from the evaporator side is distributed between the gap between the rotor and stator of the motor and the gap between the stator and the sealed chamber. In a horizontal scroll compressor, the suction gas that has passed through the motor is collected in the bottom of the motor chamber. A gas flow path leading to the suction chamber of the compression mechanism is provided across the frame and the fixed scroll, and the gas inlet of the gas flow path is provided at a position higher than the upper end of the motor rotor, so that the oil in the motor chamber is channeled through the gas flow path. An oil passage leading to the gas is provided in the frame, an oil inlet of the oil passage is provided at approximately the same height as the lower end of the motor rotor, and an oil outlet is opened in the middle of the gas passage. A horizontal scroll compressor characterized by having an ejector configured in one section.