JP2001330343A - Accumulator for compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize an accumulator by activating the vaporization of a liquid refrigerant in the accumulator. SOLUTION: An outlet pipe 8 that is connected to an exhausting port 6 and rises closer to the lower end of an intake port 5 is provided inside a cylindrical closed container 4, a screen 9 for preventing foreign objects from entering the outlet pipe 8 is deposited on an upper end opening part 8a of the outlet pipe 8, and a first rotor 10 having a propeller 10a is provided between an upper end opening part 8a of the outlet pipe 8 having the screen 9 and the lower end part of the intake port 5. Further, a second rotor 11 having a propeller 11a for agitating the liquid refrigerant being stored at the lower portion in the cylindrical closed container 4 while being rotated in one piece with the first rotor 10 is provided at the lower outer-periphery part of the outlet pipe 8, and a screen 12 is mounted to the lower outer periphery of the outlet pipe 8 where an oil-returning hole 8b is formed.

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 more particularly, to a structure capable of promoting the vaporization of an internal liquid refrigerant and reducing the size thereof.

[0002]

2. Description of the Related Art A conventional accumulator for a compressor used in a refrigeration cycle of an air conditioner or the like is, for example, shown in FIG.
And those shown in FIG. In the figure, reference numeral 1 denotes a vertical compressor, which includes a compression element for compressing a refrigerant gas while rotating in a closed container and an electric element for driving the compression element to rotate.

[0005] An accumulator 2 is fixed upright on a side wall of the compressor 1 by a fixture 3 or the like. The accumulator 2 is in the form of a cylindrical airtight container 4, the upper and lower end faces are in the form of large rounded apertures, and the upper end is a suction port 5.
And is connected to a heat exchanger (evaporator) side (not shown) by a pipe to suck refrigerant gas or a gas / liquid mixture of refrigerant. The lowermost part of the accumulator 2 has a discharge port 6 and is connected to a lower side wall of the compressor 1 by a predetermined refrigerant pipe 7 so that the separated refrigerant gas is sent to the low-pressure chamber of the compressor 1. .

[0004] Inside the accumulator 2, a screen (filter) 8 'for filtering dust and foreign matter in the refrigerant, and a cylindrical closed container 4 are disposed at the upper, lower, and upper parts of the accumulator 2, which is formed of a fine mesh with a protruding surface. An upper baffle plate 9a and a lower baffle plate 9b which are divided into three rooms are provided at a predetermined interval, and the upper baffle plate 9a is located immediately below the screen 8 ', and the center portion is slightly swelled upward. A plurality of communication holes 10 'are provided in the outer flat portion, and the communication holes 10' serve as a passage for the refrigerant downward.

The lower baffle plate 9b has a central portion formed in a cylindrical shape having an inner diameter necessary for inserting the outlet pipe 11 ', and a plurality of communication holes 10' are provided in a flat portion on the outside thereof. The communication hole 10 'serves as a passage for the refrigerant below. Further, an opening 11a 'which is connected to the outlet 6 and rises, penetrates the center of the lower baffle plate 9b, and opens under the upper baffle plate 9a is formed inside the cylindrical closed container 4.
And a plurality of oil return holes (holes for returning the lubricating oil mixed in the refrigerant to the compressor 1) opening at a lower portion in the cylindrical closed container 4.
The outlet pipe 11 ′ having the b ′ is provided.

The shape and size of the accumulator 2 are determined by a combination of its diameter and length. The upper end of the cylindrical airtight container 4 has a large rounded throttle shape, and the refrigerant flow flowing down from the suction port 5 is dispersed without increasing the resistance. The baffle plate 9a cannot be brought too close to the lower end of the suction port 5. Furthermore, in order for the outlet pipe 11 'to suck in the refrigerant with low resistance, a certain amount of space is required between the upper baffle plate 9a and the tip of the outlet pipe 11'.

One of the functions of the accumulator 2 is to separate the gas and liquid components of the refrigerant flowing through the low-pressure circuit during the operation of the refrigeration system, and to send only the gas component to the compressor 1 as much as possible. When the load fluctuation is large or when the operation of the refrigerating apparatus is stopped, the liquid refrigerant flowing in a large amount is stored in the accumulator 2. In this case, the maximum amount to be stored is such that the liquid level does not exceed the tip of the outlet tube 11 ', and the maximum amount, that is, the effective volume of the accumulator is determined by the height of the outlet tube 11' in the accumulator 2.

[0008]

The communication hole 10 '
Since the liquid refrigerant flowing down from the pipe has no momentum enough to stir the liquid refrigerant accumulated at the bottom of the cylindrical closed container 4, it takes time to vaporize the liquid refrigerant, and the liquid refrigerant is quickly discharged from the suction port 5 through the suction port 5. When a large amount of liquid refrigerant flows, the liquid level (water level) of the liquid refrigerant in the accumulator 2 rises, and the liquid refrigerant is discharged from the outlet pipe.
11 ′ The cylindrical closed container 4
There was also a problem in reducing the size of the (accumulator 2). Accordingly, an object of the present invention is to provide an accumulator for a compressor in which the cylindrical airtight container is made smaller by energizing the vaporization of the liquid refrigerant in the cylindrical airtight container.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a suction port at the upper center of a cylindrical closed container, a discharge port at the lowermost part, and the inside thereof. An outlet pipe connected to the outlet and rising to near the lower opening surface of the suction port is provided, and a screen for preventing intrusion of foreign matter into the outlet pipe is attached to the upper end opening of the outlet pipe. A first rotor having a propeller is provided between the upper end opening of the outlet pipe and the suction port, and the lower rotor of the outlet pipe rotates integrally with the first rotor. A configuration is provided in which a second rotor having a propeller for stirring the refrigerant is provided.

[0010] Further, a screen to be attached to an upper end opening of the outlet pipe is formed in a cap shape, and is covered on an upper end opening of the outlet pipe, and a fastening ring is covered on an outer periphery thereof.

[0011] Further, the central portion of the screen attached to the upper end opening of the outlet pipe is expanded upward.

Further, a screen is provided on the outer periphery of the lower part of the outlet pipe to prevent foreign matter from entering the oil return hole formed in the outlet pipe.

[0013] The second rotor may be integrally provided with a screen for preventing foreign matter from entering an oil return hole formed in the refrigerant discharge pipe.

Further, the body portion of the first rotor is formed in a cap shape, and a plurality of holes for passing a refrigerant gas are provided on an outer peripheral portion thereof.

Further, the body portions of the first and second rotors are constituted by a single tubular body which is covered with the outlet pipe and rotates.

Further, the pipe body which is rotated by being covered with the outlet pipe is divided into the first rotor side and the second rotor side, and a plurality of connecting bodies are interposed therebetween. Configuration.

[0017] Further, a structure is provided in which any one of the upper, middle and lower portions of the connecting body connecting the first rotor and the second rotor is expanded outward.

Further, the connecting member connecting the first rotor and the second rotor is made of a metal wire.

[0019]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG. In the figure, reference numeral 1 denotes a vertical compressor, which includes a compression element for compressing a refrigerant gas while rotating in a closed container and an electric element for driving the compression element to rotate. Reference numeral 2 denotes an accumulator, which is fixed upright on the side wall of the compressor 1 by a fixture 3 or the like. The accumulator 2 is in the form of a cylindrical closed container 4, the upper and lower end faces are in the shape of a large rounded throttle, and the upper end has a suction port 5. Connected to inhale refrigerant gas or refrigerant gas / liquid mixture. The lowermost part of the accumulator 2 has a discharge port 6, and is connected to a lower side wall of the compressor 1 by a refrigerant pipe 7 so that the separated refrigerant gas is sent to the low-pressure chamber of the compressor 1.

An outlet pipe 8 which is connected to the discharge port 6 and rises up to near the lower end of the suction port 5 is provided inside the cylindrical closed container 4, and foreign matter to the outlet pipe 8 is provided at the upper end opening 8 a of the outlet pipe 8. And a first rotor 10 having a propeller 10a is provided between the upper end opening 8a of the outlet pipe 8 having the screen 9 and the lower end of the suction port 5. On the other hand, a second rotor provided with a propeller 11a for stirring the liquid refrigerant, which rotates integrally with the first rotor 10 and stirs the liquid refrigerant collected in the lower part of the cylindrical closed container 4, is provided on the outer periphery of the lower part of the outlet pipe 8. Are provided.

Hereinafter, a description will be given of the form and mounting example of each member provided in the cylindrical closed container 4. The screen 9 to be attached to the upper end opening 8a of the outlet pipe 8 is formed of a fine mesh as shown in FIG. 3, is formed in a cap shape, is placed on the upper end opening 8a of the outlet pipe 8, and has a metal on its outer periphery. Made of fastening ring
The outlet pipe 8 is pressed against the outlet pipe 8.

The screen 9 shown in FIG.
The upper surface covering the upper end opening 8a is flat,
When the upper surface is bulged upward, the opening area of the upper surface is slightly increased, so that even if foreign matter is caught on the screen 9, the refrigerant gas can be passed without any trouble.

A plurality of oil return holes 8b having a diameter of about 1.5 mm are provided on the outer periphery of the lower portion of the outlet pipe 8 to return the lubricating oil mixed in the liquid refrigerant to the compressor 1, so that the compressor 1 Although lubricating oil is not deficient, in the present invention, a screen 12 is mounted on the outer periphery of the lower part of the outlet pipe 8 in which the oil return hole 8b is formed to prevent foreign matter from entering the oil return hole 8b. It has become.

The screen 12 is not limited to the outer periphery of the lower portion of the outlet pipe 8, but may be provided integrally on the second rotor 11 side.

The body portion 10b of the first rotor 10 is formed in a cap shape, and has a cylindrical closed container 4
A plurality of holes 10c for allowing the refrigerant gas inside to pass through the outlet pipe 8 side are provided.

The body portion 10b of the first rotor 10 and the body portion 11b of the second rotor 11 are covered by the outlet pipe 8 and rotate as shown in FIG.
4 and may be formed separately as shown in FIG. 4. In the latter case, the first rotor 10 and the second rotor 11 are used. Body part 10b-11b
A connecting body 13 composed of a plurality of metal wires or the like is provided between them, and the upper and lower parts are integrally rotated.

The body 10b of the upper and lower rotors 10, 11
The connecting body 13 connecting between the 11b and the upper, middle, and lower portions is shown in FIG.
By swelling outward as shown in
Collision with the liquid refrigerant falling from the suction port 5 side is likely to occur, and vaporization of the liquid refrigerant is promoted.

In the accumulator 2 having the above structure, the first rotor 10 is rotated by the liquid refrigerant entering from the suction port 5 hitting the propeller 10a, and the propeller 10a is rotated.
As a result, the liquid refrigerant can be scattered, and the liquid refrigerant can be prevented from directly entering the outlet pipe 8, and the lower second rotor rotates with the operation of the upper first rotor 10. Since the liquid refrigerant accumulated in the accumulator 2 is stirred by the propeller 11a, the vaporization of the liquid refrigerant is promoted.

[0029]

As described above, in the accumulator according to the present invention, first, the liquid refrigerant entering from the suction port is easily diffused and vaporized by the propeller of the rotor provided at the upper part in the cylindrical closed container. In addition, the lower rotor also rotates with the rotation of the upper rotor, and the liquid refrigerant accumulated in the accumulator is agitated by the propeller thereof, and the vaporization becomes active. The baffle plate, which is indispensable in conventional accumulators, is not required because the screen is provided at the upper end opening of the outlet pipe and around the oil return hole. By becoming
The size of the accumulator can be reduced.

[Brief description of the drawings]

FIG. 1 is an external view of an accumulator for a compressor according to the present invention and a conventional example.

FIG. 2 is an internal configuration diagram of an accumulator according to the embodiment of the present invention.

FIG. 3 is a perspective view of a main part of a constituent member according to the present invention.

FIG. 4 is an internal configuration diagram of an accumulator showing another embodiment of the present invention.

FIG. 5 is an internal configuration diagram of an accumulator showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Accumulator 3 Fixture 4 Cylindrical airtight container 5 Inlet 6 Outlet 7 Refrigerant pipe 8 Outlet pipe 8a Upper end opening 8b Oil return hole 9 Screen 10 First rotor 10a Propeller 10b Body 10c Hole 11 2 rotors 11a Propeller 11b Body 12 Screen 13 Connecting body 14 Fastening ring

Claims (10)

[Claims] An outlet pipe is provided at the center of the upper part of the cylindrical closed container, having an inlet at the center and an outlet at the lowermost part, and an outlet pipe connected to the outlet and rising near the lower opening surface of the inlet. A screen for preventing intrusion of foreign matter into the outlet pipe is attached to an upper end opening of the outlet pipe, and a propeller is provided between the upper end opening of the outlet pipe having the screen and the suction port. A first rotor is provided, and a second rotor provided with a propeller for stirring the refrigerant that rotates integrally with the first rotor is provided on a lower outer peripheral portion of the outlet pipe. Accumulator for compressor. 2. The compressor according to claim 1, wherein a screen to be attached to an upper end opening of the outlet pipe is formed in a cap shape, is put on the upper end opening of the outlet pipe, and a fastening ring is put on an outer periphery thereof. Accumulator. 3. The accumulator for a compressor according to claim 1, wherein a central portion of the screen attached to an upper end opening of the outlet pipe is expanded upward. 4. The accumulator for a compressor according to claim 1, wherein a screen for preventing foreign matter from entering an oil return hole formed in said outlet pipe is attached to a lower outer periphery of said outlet pipe. 5. The accumulator for a compressor according to claim 1, wherein a screen for preventing foreign matter from entering an oil return hole formed in the refrigerant discharge pipe is provided integrally with the second rotor. 6. The accumulator for a compressor according to claim 1, wherein a body of the first rotor is formed in a cap shape, and a plurality of holes for passing a refrigerant gas are provided in an outer peripheral portion thereof. 7. The accumulator for a compressor according to claim 1, wherein the body portions of the first and second rotors comprise a single tube body that is rotated over the outlet tube. 8. The pipe body, which is rotated over the outlet pipe, is divided into the first rotor side and the second rotor side, and a plurality of connecting bodies are interposed therebetween. The accumulator for a compressor according to claim 1. 9. The accumulator for a compressor according to claim 8, wherein any one of upper, middle, and lower portions of a connecting body that connects the first rotor and the second rotor is expanded outward. 10. The accumulator for a compressor according to claim 8, wherein the connecting body connecting the first rotor and the second rotor comprises a metal wire.