JPH04350479A - Accumulator - Google Patents

Abstract

PURPOSE:To obtain a long distance between a straight tube and a flowout hole of a separate plate and to prevent mixture of liquid refrigerant dropped from the hole with gas refrigerant in the tube by arranging a partition plate on a lower layer in a device, forming a bottom space, and standing the tube opened with the space. CONSTITUTION:An accumulator 20 receives refrigerant from an inlet tube 24 connected to an evaporator side of a refrigerating cycle, and removes its containing impurities by a strainer 26. A flow of the refrigerant is deflected by a separate plate 27, and liquid refrigerant, oil are dropped from a flowout hole 28. On the other hand, only clean gas having small inertial force is input into a straight tube 33, input into a bottom space 32 partitioned by a partition plate 30, and then supplied from each outlet tube 34 to a 2-cylinder compressor. In this case, the liquid refrigerant and the oil are shut OFF from mixing in the tube 33 through the outer periphery of the tube 33 by a baffle plate 35. The oil stored in the device is returned to the compressor from an oil return hole 31.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor used in a refrigeration cycle of refrigeration equipment, air conditioning equipment, etc., and more particularly to a refrigerant accumulator connected to a plural-cylinder compressor.

0002

2. Description of the Related Art Recently, for example, a two-cylinder rotary compressor having two built-in cylinders has been adopted in order to reduce the operating noise of equipment. This uses rolling pistons that rotate in separate cylinders to cancel out vibrations from each other, resulting in quieter operation. Therefore, in order to remove impurities in the refrigerant in the refrigeration cycle and prevent liquid refrigerant and oil from being sucked into the compressor, the accumulator installed in front of the two-cylinder rotary compressor is an independent system that supplies refrigerant to each cylinder. It is configured with two outlet pipes.

FIG. 2 shows a conventional accumulator connected to such a two-cylinder rotary compressor. In FIG. 2, the accumulator (1) is a closed container (2)
A refrigerant inlet pipe (3) is provided on the top surface, two outlet pipes (4) are led out from the bottom surface, and a two-cylinder rotary compressor (
Each outlet pipe (4) is connected to an inlet (11) communicating with each cylinder of (10). A mesh strainer (5) for removing impurities in the refrigerant, a separation plate (6) for separating liquid refrigerant and oil from the refrigerant are installed in the upper layer of the vessel, and an outflow hole (6) for dripping liquid refrigerant and oil is installed. 7) is opened along the outer periphery of the separating plate (6). Each outlet pipe (4) is placed side by side in the vessel with its upper end raised to a position close to the separation plate (6), and each outlet pipe ( 4) was established and generally constituted.

0004

[Problems to be Solved by the Invention] However, in the accumulator (1) having such a structure, the two outlet pipes (4) are raised up to a position close to the separation plate (6) and arranged side by side inside the vessel. Since the outflow hole (7) and the outlet pipe (4)
There is a risk that the liquid refrigerant dripping from the outflow hole (7) will mix into the outlet pipe (4) and the gas-liquid separation ability will deteriorate. In addition, in order to increase this distance, if the outlet pipes (4) are arranged closer together and the spacing between them is set small, vibrations generated during operation will cause the outlet pipes (4) to
) may interfere with each other, so this is not a preferred method.

[0005] The present invention aims to solve these problems by providing an accumulator of a new configuration that is equipped with a plurality of outlet pipes connected to such a multi-cylinder compressor. To eliminate the danger of liquid refrigerant being supplied into each cylinder of a compressor, to guarantee the gas-liquid separation ability of the accumulator, and to provide an accumulator with rational arrangement of components and excellent assembly workability. This is the purpose.

[0006]

[Means for Solving the Problems] In order to achieve these objects, the present invention provides a partition plate in the lower layer of the accumulator to form a bottom space, and raises the upper end to a position close to the separation plate. A straight pipe whose lower end passes through the partition plate and opens into the bottom space is vertically installed in the vessel. The accumulator is constructed by opening a plurality of outlet pipes into the bottom space and leading them out from the lower surface.

[0007]The partition plate is formed by bending downward along the outer circumference, and a baffle which is in contact with the outer circumferential surface of the straight pipe is provided substantially horizontally with the outer circumferential end in contact with the inner wall of the container,
Furthermore, the straight pipe can be configured to have a larger diameter than the outlet pipe, and the accumulator connected to the two-cylinder compressor is configured by leading out two outlet pipes from the bottom surface. The configuration, operation, and effects of the present invention will be specifically described below with reference to the embodiments shown in the drawings.

[0008]

[Example] The accumulator (20) shown in FIG.
This is connected to the cylinder compressor and has a cylindrical shell (2
1), an upper cover (22) and a lower cover (23) are integrally joined to form a closed container, and an inlet pipe (24) is attached to protrude from the upper cover (22). A mesh strainer (26) that removes impurities from the refrigerant, and a separation plate (27) that separates liquid refrigerant and oil from the refrigerant, sandwich the outer periphery at the joint between the shell (21) and the upper cover (22). The separation plate (2
7) is perforated along the outer periphery.

A partition plate (30) is provided in the lower layer of the container to partition the inside of the container, and a bottom space (32) is formed by the lower cover (23) and the partition plate (30). In addition, one straight pipe (33) is vertically installed along the approximate center of the vessel, the upper end of the straight pipe (33) is raised to a position close to the separation plate (27), and the lower end is a partition. The bottom space (
32). An oil return hole (31) is provided in the partition plate (30) to take out the oil accumulated in the vessel, and two outlet pipes (34) opened to the bottom space (32) are led out from the lower cover (23). There is. A baffle (3) whose inner peripheral end is in contact with the outer peripheral surface of the straight pipe (33) at a position halfway inside the vessel
5) is provided substantially horizontally with its outer peripheral end in contact with the inner wall of the shell (21), and the baffle (35) has a plurality of openings (3
6) has been established.

An accumulator (20a) shown in FIG. 3 is another embodiment of the present invention, and is formed by bending a partition plate (30a) downward along its outer periphery. Straight pipe(
33) Partition plate (30a) whose inner peripheral end is in contact with the outer peripheral surface of the lower end
) is inclined downward and comes into contact with the lower cover (23), curves along the lower cover (23), and has its outer peripheral edge aligned with the shell (21).
and the lower cover (23) are sandwiched at the joint and are welded together. Therefore, the bottom space (32) formed by the lower cover (23) and the partition plate (30a) is set to have a smaller volume than the previous example in which the partition plate (30) was formed horizontally, and the volume of the bottom space (32) formed by the lower cover (23) and the partition plate (30a) is smaller than that of the previous example in which the partition plate (30) was formed horizontally. Communication with the outlet pipe (34) is improved.

[0011]

[Operation] The accumulator (20) in the illustrated example has an inlet pipe (
24) is connected to the evaporator side in the refrigeration cycle, and the two outlet pipes (34) are connected to the suction ports communicating with each cylinder of the two-cylinder compressor. The refrigerant containing oil and impurities flows into the vessel from the inlet pipe (24), and the impurities are removed by the strainer (26). And the separation plate (
27), the flow of the refrigerant is deflected, the liquid refrigerant and oil drip from the outlet hole (28), and only the clean gaseous refrigerant with a small inertial force flows into the straight pipe (33), and is separated by the partition plate (30). It flows into the divided bottom space (32). Gaseous refrigerant is supplied to each cylinder of the two-cylinder compressor from each outlet pipe (34) opened to the bottom space (32). On the other hand, liquid refrigerant and oil travel along the outer circumferential surface of the straight pipe (33).
33) is blocked by the baffle (35), and the oil accumulated in the container is taken out from the oil return hole (31) and returned to the compressor to prevent the compressor from running out of oil.

In the accumulator (20a) shown in FIG. 3, the bottom space (32) is set to a smaller volume, and the straight pipe (
33) and each outlet pipe (34) is improved, so that the gaseous refrigerant flowing into the bottom space (32) from the straight pipe (33) flows more smoothly into each outlet pipe (34). is taken into consideration.

[0013]

[Effects of the Invention] Characteristic effects of this invention are as follows. A partition plate (30) is provided in the lower layer of the vessel to separate the bottom space (3
2) and is open to the bottom space (32).
) was installed vertically in the vessel, so the straight pipe (33
) and the outflow hole (28) of the separation plate (27) is set large, so that the liquid refrigerant dripping from the outflow hole (28) flows into the straight pipe (
33) is eliminated, and the gas-liquid separation ability of an accumulator equipped with a plurality of outlet pipes can be greatly improved.

[0014] Also, there is one vertical straight pipe (33
), it is possible to operate without multiple outlet pipes interfering with each other due to vibrations during operation, and the straight pipe (33) is connected to the outlet pipe (34) in terms of its material, thickness, etc. It is possible to adopt different pipes, and it is also permissible to set the diameter to be larger than that of each outlet pipe (34), which is effective in terms of strength and also useful in terms of manufacturing such as welding.

Furthermore, when the partition plate (30a) is formed by bending downward along the outer circumference, the bottom space (32) formed by the lower cover (23) and the partition plate (30a) is set to a smaller volume. and the straight pipe (33) and each outlet pipe (34)
The communication between the straight pipe (33) and each outlet pipe (3) has been improved.
The gas refrigerant flows smoothly to each outlet pipe (3).
4) so that the gas refrigerant is smoothly supplied to each cylinder of the compressor.

Furthermore, since it is a single straight pipe (33), the baffle (35) that comes into contact with the outer circumferential surface of the straight pipe (33) can be easily installed, and the baffle (35) can be attached with the outer end of the baffle (35) in contact with the inner wall of the container. By providing the straight pipes (33) in contact with each other and substantially horizontally, the straight pipes (33) are supported by the baffles (35) and vibrations during operation are suppressed.
It can be operated stably.

Furthermore, the accumulator of the present invention can be applied to both rotary compressors and reciprocating compressors by leading out a plurality of outlet pipes (34) from the bottom surface corresponding to the number of cylinders of the compressor. It has practical functions such as being suitable for a wide range of applications.

[Brief explanation of drawings]

[Fig. 1] A cross-sectional view of an embodiment of an accumulator of the present invention.

[Figure 2] Explanatory diagram of a conventional accumulator

FIG. 3 is a sectional view of another embodiment of the accumulator of the present invention.

[Explanation of symbols]

24 Inlet pipe 26 Strainer 27 Separation plate 30 Partition plate 32 Bottom space 33 Straight pipe 34 Outlet pipe 35 Baffle

Claims (5)

[Claims] Claim 1: An inlet pipe (24) is provided on the upper surface, a plurality of outlet pipes (34) are led out from the lower surface, and each outlet pipe (34) is connected to each cylinder of a multi-cylinder compressor. A refrigerant accumulator connected to a refrigerant, in the upper layer of the vessel, a strainer (26) for removing impurities, a liquid refrigerant,
A separation plate (27) for separating oil is provided, and a partition plate (30) is provided in the lower layer of the vessel to form a bottom space (32).
A straight pipe (33) whose upper end is raised to a position close to the separation plate (27) and whose lower end passes through the partition plate (30) and opens into the bottom space (32) is vertically installed in the vessel. , an accumulator configured by opening the outlet pipe (34) into the bottom space (32) and leading out from the lower surface. 2. The accumulator according to claim 1, wherein the partition plate (30a) is bent downwardly along the outer periphery. 3. The accumulator according to claim 1, wherein the baffle (35) abuts the outer circumferential surface of the straight pipe (33) and is provided substantially horizontally with its outer circumferential end abutting the inner wall of the container. 4. The accumulator according to claim 1, wherein the straight pipe (33) has a larger diameter than the outlet pipe (34). 5. Claims 1, 2, and 3, wherein two outlet pipes (34) are led out from the lower surface, and each outlet pipe (34) is connected to each cylinder of a two-cylinder compressor by communicating with each cylinder of the compressor. Or the accumulator according to 4.