JPH07332303A - Accumulator for compressor - Google Patents

Abstract

PURPOSE:To facilitate the positioning a coolant gas pipe and eliminate variation in insert depth of a coolant gas pipe by providing an inlet on the top of a cylindrical closed container and a discharge port on the bottom thereof, and decreasing the inner side diameter of a hole of the inlet to which the coolant gas pipe is connected by a stepped part. CONSTITUTION:An accumulator 4 standed and fixed to the side wall of a rotary compressor by a metal fitting 6 is formed like a cylindrical closed container, and an inlet 8 provided on the top is connected to an evaporator by a coolant gas pipe. A discharge port provided on the lowermost part is connected to the lower side wall of the rotary compressor 2 by a coolant gas pipe 12. The inlet 8 is formed as a stepped hole, a colant gas pipe is fitted to the opening side hole 22, and the inner side hole 24 is formed with such smaller dimensions that a coolant gas pipe can not be inserted by stepping the hole 22. A stepped part between the holes 22, 24 severs as a stopper for insertion of a coolant gas pipe so as to facilitate positioning when a coolant gas pipe is inserted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accumulator for a compressor, and in particular, it is used in a rotary compressor or the like and is of a type that sucks a refrigerant from above and sends it out downward. The present invention relates to an accumulator for compressors that ensures and facilitates work.

[0002]

2. Description of the Related Art The structure of the upper part of a conventional accumulator is
As shown in FIG. 3, the suction port 44 at the upper end of the cylindrical closed container 42 has a hole of the same diameter penetrating to the inside,
The refrigerant gas pipe connected there was inserted.

[0003]

The fact that the hole of the suction port 44 penetrates with the same diameter means that when the refrigerant gas pipe is inserted to make a connection by welding, brazing, etc., the insertion of the refrigerant gas pipe. The depth limit becomes unclear, causing the operator to take extra care, which adversely affects work efficiency. Even with sufficient caution, the variation in the insertion depth of the refrigerant gas pipe will be large.

In the case of a careless worker and an inexperienced worker, it becomes extreme and the reliability of the product is impaired.
For example, if the insertion of the refrigerant gas pipe is too shallow, the strength of the connecting portion becomes insufficient, and vibration during operation of the device causes damage to the connecting portion and failure of refrigerant leakage.

If the refrigerant gas pipe is inserted too deeply, the tip of the refrigerant gas pipe will come too close to or come into contact with the fine mesh (filter) at the upper part of the accumulator. If this happens, the refrigerant that blows out vigorously from the tip of the refrigerant gas pipe will not be dispersed and will hit the local portion of the wire mesh, causing a decrease in the durability of the wire mesh, or if the wire mesh filter is deformed and damaged, it will come into contact with the tube. If the liquid refrigerant enters the tube directly and becomes like this, the filtration function deteriorates, and dust and foreign matter to be filtered, and even fragments of the wire mesh itself are sent to the compressor, which accelerates the wear of the compressor and damage accidents. To wake up.

An object of the present invention is to ensure that the operation of inserting and connecting the refrigerant gas pipe into the suction port of the accumulator is reliable and easy, prevent failures and accidents, and ensure the reliability of the device.

[0007]

[Means for Solving the Problems] The diameter of the suction port to which the refrigerant gas pipe of the accumulator is connected is deepened by providing a step to reduce the diameter of the refrigerant gas pipe for connection. did.

[0008]

[Function] Since the hole of the intake port of the accumulator is a stepped hole, when the refrigerant gas pipe is inserted, the refrigerant gas pipe comes into contact with the step portion and stops, so that the positioning is performed. Easy to stabilize. This prevents accidents that may occur due to variations in the insertion depth of the refrigerant gas pipe.

[0009]

1 and 2 show an example in which the present invention is applied to a rotary compressor. In FIG. 2, reference numeral 2 denotes a vertical rotary compressor, which includes a rotary compression element that compresses a refrigerant gas while rotating and an electric element that rotationally drives the rotary compression element in a closed container.

Reference numeral 4 designates an accumulator, and a fixing metal fitting 6
Therefore, the rotary compressor 2 is vertically fixed to the side wall of the rotary compressor 2. The accumulator 4 is in the form of a cylindrical closed container, has an inlet 8 at its upper part, and is connected to an evaporator (not shown) by a refrigerant gas pipe to form a refrigerant gas or a refrigerant gas / liquid mixture. Inhale. A discharge port 10 is provided at the bottom of the accumulator 4, and the refrigerant gas pipe 12
Is connected to the lower side wall of the rotary compressor 2,
The separated refrigerant gas is sent to the low pressure chamber of the rotary compressor 2.

The internal structure of the upper part of the accumulator 4 is shown in FIG.
Shown in. Reference numeral 14 denotes a cylindrical hermetic container, the upper and lower end faces of which have a large rounded throttle shape, and as described above, a refrigerant pipe is connected to the upper end and the lower end to suck and discharge the refrigerant. It has a suction port 8 and a discharge port 10, which are ports for operating.

The suction port 8 is a stepped hole, and the hole 22 on the opening side is a hole for inserting and connecting the refrigerant gas pipe, and has a depth and a diameter suitable for the connection. The diameter of the hole 24 on the back side is slightly small due to the step difference in the hole 22, and the refrigerant gas pipe cannot be inserted. That is, the step with the hole 24 on the inner side serves as a stopper for inserting the refrigerant gas pipe.

The inside will be described in order from the upper side. Reference numeral 16 is a fine mesh, which has a shape of a convex surface facing upward. The lower 18 is a baffle plate, which has a shape close to a flat plate. The baffle plate 18 has
There are several holes such as cutouts in the outer direction away from the central portion to form a refrigerant passage. Both the wire net 16 and the baffle plate 18 are fixed to the inner wall of the upper portion of the cylindrical closed container 14 so as to be separated from the suction port 8 so that the refrigerant flow blown out from the suction port 8 can be dispersed.

Reference numeral 20 denotes a refrigerant discharge tube that rises straight from the lower discharge port 10 and is integrally connected to an external refrigerant gas pipe 12. The upper end opening of the refrigerant gas pipe 12 extends from the baffle plate 18. is seperated.

Next, each function will be described. Wire mesh 16
Has the function of a filter that filters dust and foreign matter in the refrigerant that enters through the suction port 8 and does not send it to the compressor. The baffle plate 18 has a function of a baffle that prevents the liquid component in the refrigerant coming from the suction port 8 from directly entering the refrigerant discharge tube 20, and a vigorous flow of the refrigerant from the suction port 8. It has a function of diffusing it in the peripheral portion of the accumulator 4 to soften the momentum.

The refrigerant discharge tube 20 has its opening in the upper part of the accumulator 4, so that the refrigerant flowing from the suction port 8 is separated into gas and liquid, and only the refrigerant gas separated in the upper part is transferred to the compressor. It has the function of sending out. Furthermore, if the compressor is stopped,
The refrigerant in the refrigeration cycle tends to be accumulated in a liquid state in the low-temperature low-pressure circuit, and therefore, when the accumulated refrigerant liquid eventually tries to flow from the evaporator side to the compressor side, in the accumulator 4 on the way. The discharge tube 28 blocks the flow of the refrigerant liquid.

[0017]

The hole of the intake port of the accumulator is a stepped hole, the large hole on the opening side is a hole for inserting and connecting the refrigerant gas pipe, and the slightly smaller hole on the back side is a stopper for inserting the refrigerant gas pipe. Therefore, the insertion of the refrigerant gas pipe may be carried out up to the point where it hits the stepped portion and stops, and since it can be prevented from being pushed too far, it is stable and easy regardless of the attention and skill of the operator. Since attention is paid to the insertion of the refrigerant gas pipe, the work efficiency is not reduced. Further, since the wall thickness of the opening of the intake port of the accumulator can be made thin, the thermal conductivity becomes good and welding with the refrigerant gas pipe becomes easy.

This prevents accidents that may occur due to variations in the insertion depth of the refrigerant gas pipe. For example, the strength of the connecting portion is insufficient due to the insertion of the refrigerant gas pipe being too shallow, the connection portion is damaged during the operation of the device, the refrigerant is leaked, and the durability of the wire netting 16 is caused by the insertion of the refrigerant gas pipe being too deep. It is possible to prevent deterioration of the filtration function due to deterioration, deformation and damage, dust and foreign matter to be filtered, and further, accelerated wear of the compressor and accidents of damage caused by fragments of the wire mesh itself entering the compressor. It is possible to prevent the deterioration of the reliability of the product as a result thereof.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an upper portion of an accumulator for a compressor according to the present invention.

FIG. 2 is a front view of a vertical rotary compressor with an accumulator.

FIG. 3 is a vertical sectional view of an upper portion of a conventional compressor accumulator.

[Explanation of symbols]

 2 Vertical rotary compressor 4 Accumulator 8 Accumulator suction port 10 Accumulator discharge port 22 Discharge port inlet side hole 24 Discharge port depth side hole

Claims (1)

[Claims] 1. A cylindrical hermetic container having an inlet at the upper part and an outlet at the lower part, wherein the diameter of the inner side of the hole of the inlet connecting the refrigerant gas pipe is reduced by providing a step. , A compressor accumulator with a limit of insertion depth of refrigerant gas pipe for connection.