JPH05288171A - Horizontal compressor - Google Patents

Abstract

PURPOSE:To enable an oil reservoir chamber to maintain the constantly high oil surface so as to have the same effect as retaining a large quantity of oil by providing the oil reservoir chamber, and keeping the oil reservoir chamber lower in pressure than a motor chamber. CONSTITUTION:A compressor container 1 is partitioned into a motor chamber 2 partitioned in the closed state, a compression mechanism chamber 3 and an oil reservoir chamber 4. The motor chamber 2 is communicated with a part in the vicinity of the upper part of the compression mechanism chamber 3 by a passage 22 provided with a throttle part 21, and the bottom member of the motor chamber 2 is communicated with the bottom part of the oil reservoir chamber 4 by an oil passage. The upper part of the oil reservoir chamber 4 is communicated with the upper part of the compression mechanism chamber 3 by a pressure equalizing pipe 23. The oil reservoir chamber 4 communicated by the pressure equalizing pipe 23 thereby becomes lower in pressure than the motor chamber 2 communicated by the throttle passage 22, so that the oil in the motor chamber 2 moves to the oil reservoir chamber 4 through an oil passage 24, and the oil surface of the reservoir chamber 4 becomes higher than that of the motor chamber 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal compressor used in a refrigerator or an air conditioner.

[0002]

2. Description of the Related Art In a conventional horizontal compressor, a motor 12 and a compression mechanism 13 are housed in a compressor container 1 as shown in FIG. The suction gas is sucked into the compressor container 1 from the suction pipe 11, cools the motor 12, separates the contained oil, and then is sucked into the compression mechanism 13 to be compressed, and the discharge pipe 1
4 is discharged. A drive shaft 15 is installed horizontally or substantially horizontally through the motor 12, one end of the drive shaft 15 is connected to the compression mechanism 13, and an oil pump 16 is installed at the other end. The oil 17 separated and accumulated at the bottom of the compressor container 1 passes through the oil suction pipe 18 of the oil pump 16 and
Is partly supplied to the pump side bearing 19, and the remaining part is supplied to the left end compression mechanism side bearing 20 through a hole penetrating the drive shaft 15 along the shaft, and further in another compression mechanism. Oil is applied to the sliding parts. In the figure, 12A is a motor stator and 12B is a motor rotor.

[0003]

The above-mentioned conventional horizontal compressor has the following problems to be solved.

In other words, in the conventional horizontal compressor, when oil reaches the height of the motor rotor 12B of the motor 12, the oil is skipped by the motor rotor 12B, so that there is a drawback that the amount of oil retained is smaller than that of the vertical compressor, and the pipe length is long. In a long air conditioner or the like, there is a problem that the oil is carried to the air conditioning system side depending on the operating condition, the oil runs short, and the compressor may be burned.

In order to solve the above problems, it is an object of the present invention to provide a horizontal compressor which is equipped with a low-pressure oil reservoir during operation and always keeps a high oil level.

[0006]

As a means for solving the above problems, the present invention drives a compression mechanism on one end side of a drive shaft which is housed in a hermetically sealed container and is substantially horizontal by a motor, and at the other end side of the drive shaft uses oil. In a horizontal compressor that drives a pump and sucks and circulates the oil that accumulates at the bottom of the closed container to perform lubrication from itself, each closed chamber that divides the closed container into a compression mechanism chamber, a motor chamber, and an oil sump chamber Among them, an oil passage that connects the motor chamber and the oil sump chamber at their bottoms, a throttle passage that connects the motor chamber and the compression mechanism chamber, and an oil sump chamber and the compression mechanism chamber It is an object of the present invention to provide a horizontal compressor including a pressure equalizing pipe communicating at an upper portion and an oil pump suction pipe opening at a bottom portion of an oil sump chamber.

[0007]

Since the present invention is constructed as described above, it has the following actions.

That is, the airtight container of the horizontal compressor is divided into a hermetically sealed chamber such as a compression mechanism chamber, a motor chamber, and an oil sump chamber, and an oil passage communicating the motor chamber and the oil sump chamber at their bottoms is provided. Since the oil is provided in the motor chamber and the oil sump chamber, the oil can freely communicate with each other. On the other hand, since the motor chamber and the compression mechanism chamber communicate with each other through the throttle passage, and the oil sump chamber and the compression mechanism chamber communicate with each other through the pressure equalizing pipe above them, the negative pressure of the compression mechanism chamber due to the suction of the compression mechanism , The oil reservoir chamber communicating with the pressure equalizing pipe has a lower pressure than the motor chamber communicating with the throttle (flow path resistance) passage, and the oil in the motor chamber moves to the oil reservoir chamber through the oil passage, and the oil level is It will be higher than the room. Therefore, a sufficient oil surface level is always maintained in the oil sump chamber, and the suction pipe of the oil pump that opens at the bottom of the oil sump chamber absorbs sufficient oil for lubrication.

Further, the maintenance of the high oil level is achieved not by causing the oil to flow into the large-capacity closed container but by the small-capacity oil sump chamber, so that a small amount of oil serves the purpose.

The pressure equalizing pipe and the suction pipe are not limited to so-called pipes, but may be any flow passages having the same function as the pipe.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. The same components as those in the conventional example are designated by the same reference numerals, and the description thereof will be omitted unless necessary.

FIG. 1 is a vertical cross-sectional view of this embodiment, in which a compression equipment container 1 which is a closed container is a motor chamber 2 which is partitioned in a sealed manner,
A passage 22 that is divided into a compression mechanism chamber 3 and an oil sump chamber 4 and has a throttle portion 21 between the motor chamber 2 and the vicinity of the upper portion of the compression mechanism chamber 3.
The bottom of the motor chamber 2 and the bottom of the oil sump chamber 4 are communicated by an oil passage 24. Further, the upper part of the oil sump chamber 4 and the upper part of the compression mechanism chamber 3 are provided with a pressure equalizing pipe 2
It is connected by 3. A motor 12 is accommodated in the motor chamber 2, and a compression mechanism 13 is accommodated in the compression mechanism chamber 3.

The other structure is almost the same as the conventional example.

Next, the operation of the above configuration will be described.

The compression mechanism 13 is a rotor 12B of the motor 12.
Is driven by the drive shaft 15 which rotates by the rotation of, and the suction gas is compressed. The suction gas is first sucked into the motor chamber 2 from the suction pipe 11, cools the motor 12, separates the oil 17, and then enters the compression mechanism chamber 3 through the passage 22 having the throttle portion 21 and is compressed by the compression mechanism 13. Is discharged from the discharge pipe 14. Since the suction side of the compression mechanism chamber 13 and the oil sump chamber 4 are pressure-equalized by the pressure equalizing pipe 23, the pressure of the oil sump chamber 4 is lower than that of the motor chamber 2, and the oil 17 accumulated in the lower part of the motor chamber 2 Is sucked into the oil sump chamber 4 by the oil passage 24, and the oil 17 can be retained up to an oil level higher than that of the motor chamber 2.

Since the oil suction pipe 18 opens the suction port at the bottom of the oil sump chamber 4, the relative height difference between the oil level and the opening is further increased, and the oil level is lowered even when the oil pump 16 rotates at high speed. There is no concern about inhaling gas due to
Full lubrication is always guaranteed.

As described above, according to this embodiment, since the high oil level is always maintained in the oil sump chamber 4 during the operation of the compressor, the oil pump 16 circulates the oil 17 abundantly to cause insufficient lubrication. There is an advantage that there is no.

Further, the oil 1 is stored in the oil reservoir 4 having a relatively small capacity.
7 is biased by a negative pressure to maintain a high oil level, which is advantageous in that it is not necessary to enlarge the compressor container 1 in order to increase the amount of lubricating oil.

[0019]

Since the present invention is constructed as described above, it has the following effects.

That is, according to the present invention, the oil sump chamber is provided, and by maintaining the pressure lower than that of the motor chamber, the oil can be retained in the oil sump chamber at a high oil level, and the compressor container can be enlarged. It is possible to create the same effect as having a large amount of oil without having to do so, and even if the oil is taken to the air conditioning system side due to long compressor piping or changes in operating conditions, lubrication is possible. The required amount of oil can be retained, and the compressor can be operated with high reliability without causing poor lubrication or seizure.

[Brief description of drawings]

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

FIG. 2 is a vertical cross-sectional view of a conventional horizontal compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 compressor container 2 motor chamber 3 compression mechanism chamber 4 oil sump chamber 11 suction pipe 12 motor 12A motor stator 12B motor rotor 13 compression mechanism 14 discharge pipe 15 drive shaft 16 oil pump 17 oil 18 oil suction pipe 19 pump side bearing 20 compression mechanism side Bearing 21 Throttle portion 22 Passage 23 Pressure equalizing pipe 24 Oil passage

Claims (1)

[Claims] 1. An oil pump which is housed in an airtight container and drives a compression mechanism on one end side of a substantially horizontal drive shaft and an oil pump on the other end side of the drive shaft to suck and circulate oil accumulated at the bottom of the airtight container. In a horizontal compressor that performs self-lubrication, the hermetically-sealed chambers are divided into a compression mechanism chamber, a motor chamber, and an oil sump chamber, and each of the chambers includes a motor chamber and an oil sump chamber. To the bottom of the oil reservoir, an oil passage that communicates with the bottom of the oil reservoir, a throttle passage that connects the motor chamber and the compression mechanism chamber, a pressure equalizing pipe that communicates the oil reservoir chamber and the compression mechanism chamber with their upper part. A horizontal compressor comprising an oil pump suction pipe that opens.