JPH0735045A - Compressor - Google Patents

Abstract

PURPOSE:To enhance the reliance upon the oil supplying performance by furnishing a pressure equalizing pipe for passage of refrigerant gas and an oil equalizing pipe for passage of refrigerator machine oil, and installing partition plates over the refrigerator oil levels in compressor units in their positions close to the oil surfaces. CONSTITUTION:The pressure of a refrigerator machine oil 6 on the side of a sealed vessel 2a heightens in association with rotation of an oil supply pipe 5a interlocking with a motor-driven element 4a of one compressor element 1a in operation, but this pressure is checked because partition plates 14a, 14b are installed over the refrigerator oil 6 levels in the two compressor units 1a, 1b in positions close to the oil surfaces. Thus the refrigerator oil 6 is prevented from flowing into the compressor unit 1b at a standstill otherwise likely to occur via an oil equalizing pipe 8, so that it is possible to equalize the refrigerator oil 6 in the two units 1a, 1b. Part of the refrigerator gas discharged from a discharge hole 10a in the unit la in operation is led via a pressure equalizing pipe 7 into the unit 1b at a standstill, and it is possible to keep constant refrigerator oil 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor used for refrigeration and air conditioning.

[0002]

2. Description of the Related Art Previously issued in May 1990, '90 -91.
The plurality of compressors connected in parallel as shown on page 379 of National Air Conditioning Equipment Data Book, Package Type Air Conditioner Part II are generally those shown in FIGS.

The above-mentioned conventional compressor will be described below with reference to this drawing. Note that, for ease of explanation, an arrow indicating the flow direction of the refrigerant gas is inserted. FIG. 2 is a sectional view of a conventional compressor. FIG. 3 is a cross-sectional view when one compressor unit of the conventional compressor is operating and the other compressor unit is stopped.

In FIGS. 2 and 3, reference numerals 1a and 1b are compressor units, in which the compression elements 3a and 3b are housed on the upper side and the electric elements 4a and 4b are housed on the lower side in the hollow cylindrical hermetic containers 2a and 2b. There is. 5a and 5b are compressor units 1a and 1b
The oil supply pipe extends to the bottom surfaces of the closed containers 2a and 2b. 6
Is provided in the bottom of the closed containers 2a and 2b with refrigerating machine oil, and the tips of the oil supply pipes 5a and 5b are buried. The two compressor units 1a and 1b are
Compressor unit 1a, so that refrigerant gas can pass between 1b,
1b is connected in parallel by a pressure equalizing pipe 7 communicating in the upper part and an oil equalizing pipe 8 communicating in the lower part of the compressor units 1a, 1b so that refrigerating machine oil can pass between the compressor units 1a, 1b. .

Regarding the compressor configured as described above,
The operation will be described below according to the flow of the refrigerant gas. The low-temperature low-pressure refrigerant gas is guided from the suction pipes 9a and 9b to reach the compression elements 3a and 3b. Here, the refrigerant gas passes through the compression stroke to become high-temperature and high-pressure gas, and the central discharge hole 10
It is discharged from a and 10b. The discharged refrigerant gas is discharged from the discharge chamber 11a, which is the upper space in the closed containers 2a and 2b.
The electric element 4 via 11b and the communication passages 12a and 12b.
a and 4b are filled, and it is led to a refrigerator system via discharge pipes 13a and 13b.

Next, the flow of the refrigerating machine oil 6 will be described.
The refrigerating machine oil 6 stored at the bottom of the closed containers 2a, 2b passes through the oil supply pipes 5a, 5b and is supplied to the electric elements 4a, 4b and the compression elements 3a, 3b. A part of the refrigerant is taken out by the refrigerant gas through the discharge pipes 13a and 13b, circulates in the refrigerator system, and then is sucked into the suction pipe 9 together with the refrigerant gas.
Returning to the compressor unit 1a, 1b via a, 9b,
It is stored again in the bottom of the closed containers 2a and 2b.

Further, in such a configuration, when the compressor unit 1a is in operation and the compressor unit 1b is stopped by controlling the capacity or the like, the refrigerant machine oil 6 circulating in the refrigerator system is Since only the compressor unit 1a in operation is returned via the suction pipe 9a, the height of the oil level of the refrigerant machine oil 6 is high in the compressor unit 1a in operation and the compressor unit 1b in stop. Therefore, the oil level is equalized through the oil equalizing pipe 8.

Further, when the compressor unit 1a is in operation and the compressor unit 1b is stopped, the pressures inside the compressor unit 1a and the compressor unit 1b are different from each other. Refrigerating machine oil 6 flows into the compressor unit 1b having a low pressure via the oil equalizing pipe 8. In order to prevent this, using the pressure equalizing pipe 7,
We are trying to equalize the pressure.

[0009]

However, in the above-mentioned conventional configuration, when one compressor unit 1a is in operation and the other compressor unit 1b is in operation, the operation is performed due to the control of the capacity or the like. Since the oil supply pipe 5a that is interlocked with the electric element 4a of the compressor unit 1a rotates and a flow in the same rotation direction is generated in the refrigeration oil 6 along with the rotation, as shown in Bernoulli's theorem, the outside of the rotation axis , Here, the pressure of the refrigerating machine oil 6 on the side surface of the closed container 2a becomes high, so that the refrigerating machine oil 6 flows into the stopped compressor unit 1b through the oil equalizing pipe 8 and the oil supply pipe of the operating compressor unit 1a. There was a drawback that the oil level near 5a dropped, causing poor oil supply.

Further, the compressor unit 1 in operation
A part of the refrigerant gas discharged from the discharge hole 10a of a is guided into the stopped compressor unit 1b through the pressure equalizing pipe 7, and fills the electric element 4b through the discharge chamber 11b and the communication passage 12b. , To the refrigerator system via the discharge pipe 13b. At this time, since the refrigerating machine oil flows from the operating compressor unit 1a to the stopping compressor unit 1b, the oil level in the stopping compressor unit 1b is remarkably raised. A large amount of 6 is taken out to the refrigerator system by this refrigerant gas, and as a result, the refrigerator oil 6 in the compressor units 1a and 1b is also reduced.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a compressor having a highly reliable oil supply.

[0012]

In order to achieve the above object, the compressor of the present invention extends from a compression element, an electric element, a refrigerating machine oil and a compressing element into a hollow cylindrical hermetic container and is immersed in the refrigerating machine oil. A plurality of compressor units each having an oil supply pipe, a pressure equalizing pipe that communicates the plurality of compressor units at an upper portion so that a refrigerant gas can pass between the plurality of compressor units, and the plurality of compressors. An oil equalizing pipe that communicates the plurality of compressor units in the lower part so that the refrigerating machine oil can pass between the units, and a partition plate mounted above the liquid level of the refrigerating machine oil of the compressor unit and close to the liquid level. It is configured with and.

[0013]

Since the compressor of the present invention is provided with the partition plate above the liquid level of the refrigerating machine oil of the compressor unit and close to the liquid level, the flow of the refrigerating machine oil in the same rotational direction as the oil supply pipe rotates. It is possible to prevent the pressure generated by the above, and thus prevent the refrigerating machine oil from flowing into the stopped compressor unit. As a result, it is possible to prevent the refrigerating machine oil from being taken out to the refrigeration system, which is generated due to the rise of the oil level of the refrigerating machine oil.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the compressor according to the present invention will be described below with reference to the drawings. It should be noted that the same configurations as those of the conventional one are denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 1 is a sectional view of a compressor according to an embodiment of the present invention. In FIG. 1, reference numerals 14a and 14b are partition plates mounted above the liquid level of the refrigerating machine oil 6 of the compressor units 1a and 1b and close to the liquid level.

Regarding the compressor configured as described above,
The operation when the compressor unit 1a is operating and the compressor unit 1b is stopped during capacity control will be described below.

The refrigerating machine oil 6 stored in the bottoms of the closed containers 2a and 2b rotates at the same time as the oil supply pipe 5a which is interlocked with the electric element 4a of the operating compressor unit 1a rotates. Directional flow occurs, and as shown in Bernoulli's theorem, the pressure of the refrigerating machine oil 6 on the side surface of the closed container 2a increases, but the liquid level is above the refrigerating machine oil 6 of the compressor units 1a and 1b. Partition plate 14 close to
Since a and 14b are attached, this pressure is hindered,
By preventing the refrigerating machine oil 6 from flowing into the stopped compressor unit 1b through the oil equalizing pipe 8, the refrigerating machine oil 6 in the compressor units 1a and 1b can be made uniform.

Further, by making the refrigerating machine oil 6 in the compressor units 1a and 1b uniform, the rise of the oil level of the refrigerating machine oil 6 in the compressor unit 1b is suppressed, and by this,
A part of the refrigerant gas discharged from the discharge hole 10a of the operating compressor unit 1a is guided into the stopped compressor unit 1b through the pressure equalizing pipe 7 and is discharged into the discharge chamber 11b.
Also, it is possible to prevent a large amount of refrigerating machine oil 6 from being taken out to the refrigerating machine system by filling the electric element 4b through the communication passage 12b and being guided to the refrigerating machine system through the discharge pipe 13b. A constant refrigerating machine oil 6 can be kept inside.

[0019]

As described above, according to the present invention, a plurality of compressor elements, an electric element, a refrigerating machine oil, and an oil supply pipe extending from the compressing element and immersed in the refrigerating machine oil are provided in a hollow cylindrical hermetic container. A compressor unit, a pressure equalizing pipe that communicates the plurality of compressor units in the upper part so that a refrigerant gas can pass between the plurality of compressor units, and a refrigerating machine oil can flow between the plurality of compressor units. Since an oil equalizing pipe that communicates the plurality of compressor units in the lower portion and a partition plate mounted close to the liquid surface above the liquid surface of the refrigerating machine oil of the compressor unit, the compressor is configured.
It is possible to prevent the refrigerating machine oil from flowing into the stopped compressor unit. As a result, it is possible to prevent the refrigerating machine oil from being taken out to the refrigeration system, which is generated due to the rise of the oil level of the refrigerating machine oil.

[Brief description of drawings]

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

FIG. 2 is a vertical sectional view of a conventional compressor.

FIG. 3 is a vertical cross-sectional view when only one compressor unit of a conventional compressor is operating.

[Explanation of symbols]

 1a, 1b Compressor unit 2a, 2b Airtight container 3a, 3b Compressing element 4a, 4b Electric element 5a, 5b Oil supply pipe 6 Refrigerating machine oil 7 Pressure equalizing pipe 14a, 14b Partition plate

Claims (1)

[Claims] 1. A plurality of compressor units provided with a compression element, an electric element, a refrigerating machine oil, and an oil supply pipe extending from the compressing element and immersed in the refrigerating machine oil in a hollow cylindrical hermetic container, and the plurality of compression units. Pressure equalizing pipe that communicates the plurality of compressor units at the top so that refrigerant gas can pass between the compressor units, and the plurality of compressor units at the bottom so that refrigerating machine oil can pass between the plurality of compressor units. A compressor provided with an oil equalizing pipe communicating with each other, and a partition plate mounted above the liquid level of the refrigerating machine oil of the compressor unit and close to the liquid level.