JP2001280280A - Horizontal type rotary compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set a level of refrigerator oil in a gas chamber on the compression part side to a value higher than a conventional level during operation of a horizontal rotary compressor and to maintain a flow rate of gas discharge through a discharge pipe at a given value. SOLUTION: A motor-driven part 2 and a compression part 3 are disposed in a closed container 1 and partition plates 4 and 5 are situated on both sides of the compression part 3 to form first and second gas chambers 6 and 7. A suction opening 8 communicated with a cylinder 3a of a compression part 3 is formed in the lower part of the closed container 1 and a two-port discharge pipe 12 to discharge compression refrigerant gas from the gas chamber 7 is mounted on the upper part thereof. The two-port discharge pipe 12 increases a flow velocity of gas by decreasing the diameter of a first branch pipe part 12a and raises the oil level, available during operation, of the refrigerator oil 10 to a value higher than a conventional oil level to supplement a flow rate with that through a second branch pipe part 12b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor for refrigeration and air conditioning, and more particularly to a horizontal rotary compressor capable of ensuring stable lubrication of a compression section even when a flow rate of a refrigerant gas is small.

[0002]

2. Description of the Related Art A horizontal rotary compressor is conventionally known, for example, as shown in FIG.
As shown in FIGS. 1A and 1B, an electric motor unit 2 and a compression unit 3 are disposed in a sealed container 1 serving as a compressor body, and partition plates 4 and 5 are provided on both sides of the compression unit 3. The space on the left side of the partition plate 4, that is, the space on the side of the electric unit 2 is defined as a first gas chamber 6, and the space on the right side of the partition plate 5 is defined as a second gas chamber 7. Further, the cylinder 3a of the compression unit 3 is
At the top, a discharge pipe 9 for discharging the compressed refrigerant gas from the second gas chamber 7 is attached, and the refrigerant gas taken in from the suction port 8 is transferred along the inner peripheral surface of the cylinder 3a. Compressed by the eccentrically rotating roller 3 b and sent into the first gas chamber 6. The compressed gas is supplied from the first gas chamber 6 to the notches 4a, 5a of the partition plates 4,5.
And flows into the second gas chamber 7 to be discharged from the discharge pipe 9 and sent to a refrigerator or the like.

[0003]

In the above-described conventional horizontal rotary compressor, the refrigerating machine oil 1
0 is stored therein, and the refrigerating machine oil 10 is sucked from an oil absorption pipe 11 communicating with the inside of the compression section 3 and used for lubrication of the rollers 3 b of the compression section 3. When the compressor is stopped, the refrigerating machine oil 10 has the same gas pressure in the first gas chamber 6 and the second gas chamber 7, so that the same oil level is maintained as shown in FIG. However, during operation of the compressor, the gas pressure P1 of the first gas chamber 6 is larger than the gas pressure P2 of the second gas chamber 7 (P1> P
2), the second gas chamber 7 has a higher oil level as shown in FIG. Therefore, the refrigerating machine oil 10 is easily sucked by the oil suction pipe 11, and lubrication of the compression unit 3 is smoothly performed. However, when the flow rate of the compressed refrigerant gas is reduced, the oil level of the second gas chamber 7 does not increase so much during operation, resulting in insufficient oil absorption by the oil absorption pipe 11 or sufficient lubrication of the compression section 3 without being sucked. Not done, causing compressor failure or shortening compressor life.

In order to prevent such poor lubrication of the compressor, the gas pressure in the second gas chamber 7 is reduced by, for example, reducing the diameter of the discharge pipe 9 and increasing the flow rate of gas discharge from the second gas chamber 7. Means for lowering the pressure and thereby increasing the difference from the gas pressure in the first gas chamber to increase the oil level of the refrigerating machine oil 10 in the second gas chamber 7 can be considered. However, if the diameter of the discharge pipe 9 is reduced to a small diameter, the flow rate of the gas discharge increases, but the flow rate of the gas discharge decreases, so that the gas supply amount to the refrigerator or the like becomes insufficient, causing inconvenience.

[0005] Accordingly, the present invention provides a method of operating the compressor during operation of the compressor.
It is an object of the present invention to provide a horizontal rotary compressor in which the oil level of the refrigerating machine oil in the gas chamber can be made higher than before and the gas discharge flow rate from the discharge pipe can be maintained at a predetermined amount.

[0006]

As a specific means for achieving this object, the present invention provides a motor-driven unit and a compression unit disposed in a closed container containing refrigerating machine oil at the bottom. By providing a partition plate on both sides of the unit, the electric unit side is a first gas chamber, the compression unit side is a second gas chamber, and the closed container has a suction port communicating with the compression unit, A discharge pipe for discharging a compressed refrigerant gas from a gas chamber, and a horizontal rotary compressor in which a gas and oil passage is formed in the partition plate, wherein the discharge pipe is connected to an airtight container; The gist of the present invention is a horizontal rotary compressor having a two-port discharge pipe branched into two branches. In this horizontal rotary compressor, one branch pipe of the two-port discharge pipe is formed to have a small diameter so as to increase the flow rate of the refrigerant gas discharged from the second gas chamber, and the other branch pipe is formed of The flow rate of the refrigerant gas is set to a diameter suitable to complement the flow rate of the refrigerant gas, and the flow rate of the refrigerant gas discharged from the two-port discharge pipe matches or approximates the flow rate of the refrigerant gas discharged from the standard single discharge pipe. , Is characterized.

[0007] Since one branch pipe of the two-port discharge pipe has a smaller diameter than the standard discharge pipe, the flow rate of the gas discharged from the second gas chamber is increased to increase the flow rate of the second gas chamber. By reducing the gas pressure, the difference from the gas pressure in the first gas chamber can be increased, and the oil level of the refrigerating machine oil can be increased. At the same time, the gas is discharged from the other branch pipe portion of the two-port discharge pipe to compensate for the shortage of the gas flow rate, and the total gas discharge amount from the two-port discharge pipe can be adjusted to the standard discharge pipe.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the horizontal rotary compressor according to the present invention will be described with reference to the accompanying drawings. However, the same members as those of the conventional example are denoted by the same reference numerals for easy understanding. In FIG. 1, reference numeral 1 denotes an airtight container, in which an electric unit 2 and a compression unit 3 are disposed, and partition plates 4 and 5 are attached to both sides of the compression unit 3 to form a first gas. Room 6
And a second gas chamber 7 are formed.
Is housed.

[0009] A suction port 8 communicating with the cylinder 3a of the compression section 3 is provided at a lower part of the closed vessel 1, and a two-port discharge pipe 12 for discharging gas from the second gas chamber 7 is attached at an upper part. ing. This two-port discharge pipe 12
As described above, the first branch pipe portion 12a formed to have a smaller diameter than the discharge pipe 9 in the conventional example and the second branch pipe portion 12b formed to have a smaller diameter are forked. The two branch pipes join at almost the middle.

This horizontal rotary compressor is used by being incorporated in a system such as a refrigerator or an air conditioner as in the prior art, and sucks refrigerant gas discharged from those devices from the suction port 8 to the compression section 3. Compressed and discharged from the two-port discharge pipe 12 and supplied to the equipment again.

FIGS. 1A and 1B show a state when the compressor is stopped. Since the first gas chamber 6 and the second gas chamber 7 have substantially the same gas pressure, the refrigeration The oil level of the machine oil 10 is stationary at the same level in both gas chambers.

FIGS. 2A and 2B show the state of the compressor during operation. The electric unit 2 is driven to rotate the rotating shaft 13, and is fitted to the eccentric portion 13 a of the rotating shaft 13. The rotated roller 3b rotates eccentrically along the inner peripheral surface of the cylinder 3a, and compresses the refrigerant gas taken into the cylinder 3a. The compressed refrigerant gas flows into the muffler 14 from a through hole formed in the bearing portion 13 and a discharge valve (not shown), and flows through the discharge hole (not shown) of the muffler 14 into the first gas chamber 6. Sent to. The compressed refrigerant gas sent into the first gas chamber 6 is
The gas passes through the notches 4a, 5a of the partition plates 4, 5 and flows into the second gas chamber 7, is discharged from the two-port discharge pipe 12, and is supplied to a refrigerator, an air conditioner (not shown), and the like. .

When the compressed refrigerant gas is discharged from the two-port discharge pipe 12, the gas passing through the first branch pipe portion 12a is throttled to increase the flow velocity, and as a result, the gas in the second gas chamber 7 is reduced. The gas quickly flows into the first branch pipe portion 12a, and the gas pressure P3 decreases. Since this gas pressure P3 is smaller than the conventional gas pressure P2 (P3 <P2), the difference (P1-P3) from the gas pressure P1 of the first gas chamber 6 is the conventional gas pressure difference (P1-P3).
2) It becomes larger.

Therefore, the refrigerating machine oil 10 is supplied to the first gas chamber 6.
From the second gas chamber 7 via the oil passages 4b and 5b of the partition plates 4 and 5, and the oil level becomes higher than before. Thereby, high-level refrigerating machine oil 10 can be reliably sucked up from the oil suction pipe 11, and lubrication of the compression unit 3 during operation can be sufficiently performed, and poor lubrication of the compression unit 3 can be prevented.

By reducing the diameter of the first branch pipe portion 12a of the two-port discharge pipe 12, the flow rate of the discharged gas may be reduced. However, the discharge gas also flows into the second branch pipe portion 12b. However, since the second branch pipe portion 12b joins the first branch pipe portion 12a at an intermediate portion of the two-port discharge pipe 12, a decrease in the gas flow rate can be supplemented. By setting the gas discharge amount from the two-port discharge tube 12 to match or approximate the gas discharge amount from the conventional discharge tube 9, it is possible to perform the same function as the conventional discharge tube. .

[0016]

As described above, according to the present invention, in a horizontal rotary compressor, the discharge pipe is formed into a two-port discharge pipe, and one of the branch pipes is formed to have a small diameter to increase the flow rate of the discharge gas. Since the other branch pipe section is joined to replenish the flow rate of the discharge gas, the difference between the gas pressure of the compression section side gas chamber and the gas pressure of the electric section side gas chamber is made larger than before, and compression is performed. By increasing the oil level of the refrigerating machine oil in the section gas chamber, stable lubrication of the compression section can be guaranteed,
Moreover, there is an effect that the flow rate of the discharge gas can be secured as before without increasing the discharge resistance.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a horizontal rotary compressor according to the present invention, in which (A) is a schematic cross-sectional view when stopped, and (B) is a schematic cross-sectional view of a main part viewed from a side.

FIG. 2A is a schematic cross-sectional view during operation, and FIG.
Is a schematic sectional view of the main part seen from the side

FIG. 3 is an enlarged view of a portion Q in FIG. 1;

FIG. 4 shows a conventional horizontal rotary compressor.
(A) is a schematic cross-sectional view at the time of stoppage, (B) is a schematic cross-sectional view of a main part viewed from the side.

FIG. 5A is a schematic cross-sectional view during operation, and FIG.
Is a schematic sectional view of the main part seen from the side

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Closed container 2 ... Electric part 3 ... Compression part 4, 5 ... Partition plate 6 ... 1st gas chamber 7 ... 2nd gas chamber 8 ... Suction port 9 ... Discharge pipe 10 ... Refrigeration oil 11 ... Oil absorption pipe 12 ... 2 port discharge pipe 13 ... bearing part 14 ... muffler

Claims (3)

[Claims] An electric motor and a compressor are disposed in a closed container in which a refrigerator oil is stored at a bottom portion, and partition plates are provided on both sides of the compressor, respectively, so that the electric motor can be connected to a first gas. Room,
The compression section side is a second gas chamber, and the closed vessel is provided with a suction port communicating with the compression section, and a discharge pipe for discharging compressed refrigerant gas from the second gas chamber. A horizontal rotary compressor in which a gas and oil passage is formed, wherein the discharge pipe is a two-port discharge pipe in which a portion connected to a closed container branches into two branches. 2. The two-port discharge pipe according to claim 1, wherein one of the branch pipes has:
2. The horizontal rotary compressor according to claim 1, wherein the diameter of the other branch pipe is set to a diameter suitable for supplementing the flow rate of the refrigerant gas. Machine. 3. The horizontal rotary compressor according to claim 1, wherein a flow rate of the refrigerant gas discharged from the two-port discharge pipe matches or approximates a flow rate of the refrigerant gas discharged from the standard single discharge pipe.