JP3337741B2 - Horizontal compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal compressor incorporated in an air conditioner or a refrigerator, and more particularly to a horizontal compressor having an improved lubricating oil level.

[0002]

2. Description of the Related Art Conventionally, in a horizontal compressor of this type, the level of lubricating oil stored in the compressor is set to a level at which a rotor of an electric element does not get in contact with lubricating oil. However, in such a case, in a small horizontal compressor, the amount of lubricating oil becomes extremely small, so that at the time of starting or the like, lubricating oil may foam and shortage of lubricating oil may occur. In addition, since the horizontal compressor has many oil film seals, the sealing surface of the compression element decreases due to the decrease in the lubricating oil level during operation. Invited,
Compression efficiency was decreasing. Further, lubrication could not be performed sufficiently, and there was a risk that the vane portion and the like would seize.

A conventional horizontal compressor which addresses this problem will be described below with reference to FIG. This horizontal compressor is
The gas compressed by the compression element 31 is led to the electric element side space 32 through a pipe 33 provided outside the compressor, and the pressure of the electric element side space 32 is set to be slightly higher than that of the compression element side space 34 so that lubrication is performed. The level of the oil 35 is set to be low in the electric element side space 32 and high in the compression element side space 34. According to this horizontal compressor, since the level of the lubricating oil 35 is high in the compression element side space 34, the compression element 31
Can maintain good sealability.

In another conventional horizontal compressor, a gas is directly discharged from a compression element to a compression element side space without providing the pipe 33 as described above, and a compressor is provided through a discharge pipe provided in the compression element side space. By discharging gas to the outside and pulling it, the pressure in the compressor element side space is lower than the electric element side space,
In some cases, the level of the lubricating oil was increased in the compression element side space.

[0005]

However, in the conventional horizontal compressor shown in FIG. 4, since the pipe 33 is provided outside the compressor, the horizontal compressor becomes large and lacks compactness. . At the same time, since the lubricating oil level cannot be sufficiently secured by this configuration, in a rolling piston type compressor as shown in FIG. 5, a vane 41 of a compression element is arranged at the lowermost portion of the compressor. Since the suction pipe 42 of the hermetic container must be disposed near the lower part of the compressor, the lower part of the horizontal compressor becomes large, and there is a problem of lack of compactness.

Further, in a horizontal compressor in which gas is directly discharged from the compression element to the compression element side space without providing the pipe 33, the discharge gas does not circulate in the electric element side space. There was a problem that cooling could not be performed and burning of the electric element (motor) occurred.

The present invention solves the above-mentioned problem, and a pipe is provided outside the compressor or a suction pipe of a closed container is provided near a lower portion of the compressor while sufficiently ensuring a lubricating oil level in a space on the compressor element side. It is an object of the present invention to provide a horizontal compressor that does not need to be disposed and that can prevent burnout of an electric element.

[0008]

Means for Solving the Problems To solve the above problems, a first means of the present invention is to provide an electric element in a closed container,
In a horizontal compressor in which a compression element driven by the electric element and lubricating oil for lubricating the compression element are provided, and gas is discharged from the compression element into the closed container, the compression element and the electric element A partition plate having a gas communication portion at the top and a small area oil communication portion at the bottom is provided, and lubricating oil is supplied from the space closer to the electric element side than the partition plate in the sealed container. Inhale it and it 's a partition in a sealed container
An oil pump for discharging remote to the compression element side of the space through the oil passage, and connected to a rotary shaft which is rotated by the electric element, a discharge pipe for discharging the gas from the sealed container provided to the electric element side, the oil passage communicating portion area, in which the lubricating oil level of the compression element side as a boundary specification Setsuban is sized to cause the difference in height of the lubricating oil level to be higher than the lubricating oil level in the motor element side of is there.

In a second aspect of the present invention, in the first aspect, an oil pump is provided at an end of the rotary shaft on the side of the electric element, and the rotary shaft is provided with a hollow oil passage for sending lubricating oil to the compression element. Is formed.

A third aspect of the present invention is the above-mentioned first aspect, wherein the compression element is constituted by a rolling piston type, the vane is disposed below the center of the compressor, and the gas is sucked into the closed container. The pipe is located near the center of the compressor.

[0011]

In the first means, when the rotary shaft is driven to rotate by the electric element, the oil pump connected to the rotary shaft is rotated, and the lubricating oil is sucked from the electric element side and discharged to the compression element side. As a result, a lubricating oil reservoir is formed on the compression element side with respect to a partition plate between the compression element and the electric element. Thereby, the lubricating oil surface on the compression element side can be sufficiently ensured, and the mechanical parts of the compression element can be reliably sealed. Further, the gas discharged from the compression element is discharged to the compression element side space, then passes through the gas communication part of the partition plate and the electric element side, and is discharged from the discharge pipe to the outside of the compressor, so that the motor is sufficiently cooled. Done in

Further, since the hollow oil passage is formed in the rotary shaft by the second means, it is not necessary to separately provide an oil passage pipe or the like. Further, according to the third means, when the compression element is of a rolling piston type, the vane is arranged below the center of the compressor, and the gas suction pipe for the closed vessel is arranged near the center of the compressor. This eliminates the necessity of disposing the vanes and the suction section below the compressor as in the related art, and allows the horizontal compressor to be configured to be compact in the vertical direction.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a horizontal compressor according to an embodiment of the present invention. As shown in FIG. 1, an electrically driven element 2 and a compression element 4 driven by the electrically driven element 2 via a rotating shaft 3 are laterally connected in the closed container 1. A partition plate 5 is disposed between the electric element 2 and the compression element 4, and a
As shown in FIG. 2, a gas communication portion 6 is opened at an upper portion of the partition plate 5 to allow the gas discharged from the compression element 4 to communicate therewith, and a lubricating oil 7 is communicated at a lower portion inside the partition plate 5. An oil communication portion 8 for flowing the oil is opened.

An oil pump 9 is connected to an end of the rotating shaft 3 on the side of the electric element, and the oil pump 9 has a suction port 10 extending downward. Further, the rotating shaft 3 is formed to be hollow, and the lubricating oil 7 sucked up from the suction port 10 is sent to the compression element side space 12 through the hollow oil passage 11.

The rotary shaft 3 is rotatably supported by a main bearing 13 and a sub bearing 14. A sub bearing 14 provided on the opposite side of the electric element 2 receives gas compressed by the compression element 1. A discharge valve (not shown) for discharging is provided.
A muffler 15 is attached to the auxiliary bearing 14 to form a discharge chamber 16, and the gas in the discharge chamber 16 flows out of the hole 19 above the muffler 15 into the compression element side space 12. On the other hand, closed container 1
A discharge pipe 18 for discharging gas from the electric element side space 17 is provided on the electric element side.

As shown in FIG. 3, the compression element 4 of the horizontal compressor is of a rolling piston type, and a vane 22 which presses against a piston 21 is disposed at a lower portion near the center of the compressor. A gas suction pipe 23 is disposed at the center of the compressor. 24 is a cylinder.

In the above configuration, the gas compressed by the compression element 4 passes through the discharge valve of the auxiliary bearing 14 and the discharge chamber 16.
Is discharged. The gas discharged to the discharge chamber 16 is discharged from the hole 19 of the muffler 15 to the compression element side space 12, and a gap provided between the electric element 4 and the closed container 1 from the gas communication part 6 above the partition plate 5. After cooling the electric element 4, the electric element 4 is guided to the electric element side space 17, and is discharged from the compressor through a discharge pipe 18 provided on the electric element 2 side.

The lubricating oil 7 in the closed casing 1 is sucked up from a suction port 10 of an oil pump 9 and then discharged to a compression element side space 12 through a hollow oil passage 11 of the rotating shaft 3. Lubricating oil 7 discharged into compression element side space 12
Forms a lubricating oil reservoir in the compression element side space 12 with the partition plate 5 as a boundary. Here, a part of the lubricating oil 7 in the oil sump flows from the oil communication portion 8 below the partition plate 5 to the electric element side,
It is guided to the electric element side space 17 through the gap between the electric element 2 and the closed casing 1. By setting the area of the oil communication portion 8 of the partition plate 5 to be relatively small, the oil supply amount of the oil pump 9 is superior, the amount of oil that accumulates in the compression element side space 12 is increased, and the mechanical portion required for sealing is lubricating oil. 7, the sealing property of the compression element 4 is kept good.

As shown in FIG. 3, the lubricating oil 7 sufficiently accumulates in the compressor side space 12 with the partition plate 5 as a boundary, and in the rolling piston type compressor, the vane 22
Since it is not necessary to dispose a vane or a suction portion below the compressor as in the prior art, the height of the compressor can be kept low and the compressor can be compactly stored in an air conditioner or the like.

It is needless to say that the structure of the horizontal compressor can be easily applied to a structure other than the rolling piston type.

[0021]

As described above, according to the present invention, between the compression element and the electric element, there is provided a partition plate having a gas communication part at an upper part and an oil communication part with a small area at a lower part, Lubricate the space on the motorized element side of the partition plate in the closed container.
The compression element side than the partition plate in the sealed container
An oil pump for discharging into the space through the oil passage,
Was connected to a rotary shaft which is rotated by the electric element, a discharge pipe for discharging the gas from the sealed container provided to the electric element side, the area of the oil passage communicating portion, the lubricating oil level of the compression element side as a boundary specification Setsuban The lubricating oil level on the compression element side can be sufficiently ensured by making the lubricating oil level higher than the lubricating oil level on the electric element side. Seal can be reliably performed, and a decrease in compression efficiency can be prevented. In addition, since the gas discharged from the compression element passes through the electric element part and is discharged from the discharge pipe to the outside of the compressor, the motor is sufficiently cooled. Furthermore, unlike the related art, it is not necessary to provide a discharge gas communication pipe outside the compressor.

Further, the oil pump is provided at the end of the rotating shaft on the side of the electric element, and a hollow oil passage is formed in the rotating shaft for sending the lubricating oil to the compression element, so that a separate oil passage pipe or the like is not provided. You may.

Further, when the compression element is of a rolling piston type, the vane is disposed below the center of the compressor,
By arranging the gas suction pipe to the closed container near the center of the compressor, it is no longer necessary to arrange the vanes and the suction section at the bottom of the compressor as in the past, making the horizontal compressor compact vertically. Can be configured.

[Brief description of the drawings]

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

FIG. 2 is a side view of a partition plate and the like of the horizontal compressor.

FIG. 3 is a cross-sectional view of the horizontal compressor.

FIG. 4 is a cross-sectional view of a conventional horizontal compressor.

FIG. 5 is a sectional view of the conventional horizontal compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 2 Electric element 3 Rotating shaft 4 Compression element 5 Partition plate 6 Gas communication part 7 Lubricating oil 8 Oil communication part 9 Oil pump 10 Suction port 11 Hollow oil passage 12 Compression element side space 17 Electric element side space 18 Discharge pipe 21 Piston 22 Vane 23 Suction pipe 24 Cylinder

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F04C 29/02 F04C 18/356

Claims (3)

(57) [Claims] An electric element, a compression element driven by the electric element, and a lubricating oil for lubricating the compression element are provided in a closed container, and gas is discharged from the compression element into the closed container. In the horizontal compressor to be provided, between the compression element and the electric element, a partition plate having a gas communication portion in the upper portion and an oil communication portion with a small area in the lower portion is provided, and the lubricating oil is provided in the sealed container. On the electric element side of the partition plate
Electric discharge tube of the oil pump to discharge through the partition plate oil passage to the space of the compression element side than in the closed casing is sucked from the space, and connected to a rotary shaft which is rotated by the electric element, discharging the gas from the sealed container provided element side, the area of the oil passage communicating portion, a difference in height of the lubricating oil level to the lubricating oil level of the compression element side as a boundary specification Setsuban is higher than the lubricating oil level in the motor element side A horizontal compressor that is sized to generate. 2. The horizontal compressor according to claim 1, wherein an oil pump is provided at an end of the rotary shaft on the side of the electric element, and a hollow oil passage for sending lubricating oil to the compression element is formed in the rotary shaft. 3. The compressor according to claim 1, wherein the compression element is a rolling piston type, the vane is disposed at a lower portion near the center of the compressor, and a gas suction pipe to the closed vessel is disposed near the center of the compressor.
The horizontal compressor as described.