KR20000020281A - Screen holder of accumulator for rotary compressor - Google Patents

Abstract

PURPOSE: A screen holder of an accumulator is provided to improve the channel of a refrigerant through a suction pipe and to improve the whole performance of a compressor by preventing turbulence from being generated. CONSTITUTION: A screen holder of an accumulator for a rotary compressor is formed in a curve shape projected into a suction pipe. Plural inlet holes for a refrigerant are provided along the outside of the screen holder. A refrigerant is transferred to the inlet holes without changing a channel by forming the screen holder in a curve shape. Therefore, the screen holder prevents turbulence from being generated.

Description

Rotary Compressor Screen Holder

The present invention relates to a rotary compressor, and more particularly, to a screen holder structure installed at the inlet side of the L-tube of the accumulator where the refrigerant is sucked in to prevent the liquid refrigerant from flowing into the compressor body.

1 and 2 will be described as an example of a rotary compressor according to the prior art.

Conventional rotary compressors can be largely divided into a compressor body 10 and an accumulator 1;

The compressor main body 10 is constricted by the stator 11 and the rotor 12 and the rotor 12, which are the transmission elements, and eccentrically rotates in the compression chamber in the cylinder 13 together with the rotation of the rotor 12. The shaft 14, the main bearing 15 and the sub bearing 16 supporting the upper and lower portions of the shaft 14, and the roller 18 sliding and rotating on the eccentric portion 17 of the shaft 14; And a discharge port 19 for discharging the gas compressed in the compression chamber to the outside.

In addition, the accumulator 1 connected to the inlet 20 of the compressor main body 10 through the L-tube 6 has a suction pipe 8 for sucking refrigerant from the evaporator (not shown). It is provided with a cylindrical shell (2) for sealing the inside, and the shell (2) in the shell (2) to filter the contaminants from the sucked refrigerant, and the screen (3) and at the same time the screen ( The screen holder 4 is provided with a coolant inlet hole 5 for introducing the coolant through the 3).

In addition, an L-tube 6 for introducing refrigerant into the compressor main body is inserted into the center portion from the lower part of the shell 2, and on one side of the L-tube 6, oil flowing through a system cycle is introduced into the compressor main body. The oil return hole 7 is provided, and the L-tube 6 is supported by the tube holder 9.

Looking at the process of introducing a new refrigerant from the cycle in the state configured as described above are as follows.

At the beginning of the actual operation of the compressor, the two-phase (gas + liquid) refrigerant from the evaporator flows in through the suction pipe 8 of the shell 2 and passes through the screen 3, at which time contaminants generated in the cycle. (Dust, carbides, abrasive particles, etc.) is filtered through the screen 3 and flows to the lower side of the shell 2, where the coolant directly strikes the screen holder 4, the path of which is the circumference of the screen. It is changed into the refrigerant inlet hole 5 on the outer side of the direction, and flows in the downward direction of the shell 2 and the L-tube 6 direction through the hole.

In this process, most of the liquid phase refrigerant in the two-phase refrigerant vaporizes, flows to the lower side of the shell (2), rises and is supplied to the compressor main body (8) through the L-tube (6). The coolant flows into the lower end of the shell 2 by its weight and inertial force. In the L-tube 6, the refrigerant is sucked in accordance with the volume change of the suction chamber, and the refrigerant enters the inlet 20 while causing a complicated flow such as a vortex phenomenon between the screen holder 4 and the L-tube 6. .

On the other hand, the oil exiting the system flows into the accumulator 9 together with the refrigerant and is collected in the lower part of the shell 2, and when the oil level is above a certain level, the oil return hole 7 provided in the L-tube 6 is opened. Through the compressor main body 8 again.

However, in the conventional accumulator structure, the refrigerant sucked from the cycle is rapidly changed in the direction of flow around the screen holder 4, and the screen holder 4 performs a sudden pressure in addition to performing the main functions of vaporization and flow path change of the liquid refrigerant. When the drop and the efficiency decrease due to the increase of flow resistance and vortex around the screen holder, the refrigerant passing through the accumulator 1 is lowered in pressure, the suction side loss is caused by the pressure drop do. In addition, since the refrigerant reaches the L-tube through the complicated path around the screen holder 4, the amount of the refrigerant (mass flow rate) sucked to the suction chamber side is reduced, which is related to the deterioration of the freezing capacity of the compressor.

That is, from the performance point of view of the compressor, the pressure drop occurs due to the rapid flow path change around the screen holder, the flow rate of the refrigerant sucked by the complicated flow path and the vortex phenomenon is reduced, the refrigeration capacity is reduced, the overall performance is reduced This will occur.

In addition, the vortex generation phenomenon around the screen holder affects the noise of the accumulator, and the noise of the accumulator is further increased due to the vortex generation and the refrigerant collision of the screen holder.

The present invention has been invented to solve the problems of the prior art as described above, by having the structure of the screen holder in the form of a curved surface similar to the flow path of the suction refrigerant, the pressure drop of the refrigerant flowing through the suction pipe and the complicated refrigerant It is an object of the present invention to provide a screen holder structure that can improve performance loss and noise caused by flow loss due to a path and collision and vortex generation of a refrigerant.

1 is a cross-sectional view of a rotary compressor to which the prior art is applied.

2 is a screen holder and screen coupling structure according to the prior art.

3 is an accumulator structure diagram to which a screen holder according to an embodiment of the present invention is applied.

4 is a screen holder and screen coupling structure according to a first embodiment of the present invention.

5 is a screen holder and screen coupling structure according to a second embodiment of the present invention.

6 is a structural diagram of a screen holder according to a third embodiment of the present invention.

7 is a conceptual diagram comparing the refrigerant flow path in the accumulator according to the prior art and the present invention,

(A) is a state diagram when applying a conventional screen holder.

(B) is a state diagram at the time of applying the screen holder of this invention.

*** Explanation of symbols for the main parts of the drawing ***

1: accumulator 2: shell

3: screen 6: L-tube

7: oil return hole 8: suction pipe

9: L-tube holder 100,200,300: screen holder

101,201,301: refrigerant inlet hole 202,302: central protrusion

303: outskirts

The screen holder structure according to one side of the present invention for achieving the above object forms a curved surface protruding toward the suction pipe side, a plurality of refrigerant inlet hole through which the refrigerant is passed is formed along the outer side of the screen holder It is characterized by.

Preferably, the central portion of the screen holder is characterized in that the curved central projection is further formed to protrude toward the suction pipe within a range that does not interfere with the refrigerant inlet hole.

According to another aspect of the present invention, a screen holder structure according to another aspect of the present invention provides a central protrusion protruding toward a suction pipe side, and an outer side protruding an outer protrusion protruding toward an L-tube side in an opposite direction. The outer protrusions are characterized in that a plurality of refrigerant inlet holes are formed.

Preferably, the central protrusion and the outer protrusion are characterized by forming a continuous curved shape.

In addition, the outer end of the screen holder is characterized in that the caulking treatment in the upper or lower direction to fix the screen.

In this way, the shape of the screen holder maintains a curved shape similar to the flow direction of the suction refrigerant flow, thereby improving the flow path of the refrigerant introduced into the accumulator through the suction pipe, thereby reducing suction loss due to vortex prevention and increasing mass flow. It can be seen that the overall performance of the compressor can be increased.

And, there may be a plurality of embodiments of the present invention, hereinafter will be described in detail with respect to the most preferred embodiment.

In addition, the rotary compressor to which the present invention is applied has the same overall configuration and operation state except the screen holder of the accumulator as in the prior art, so that the other components are denoted by the same reference numerals, and the description thereof is omitted. have.

Through this preferred embodiment, it is possible to better understand the objects, features and effects of the present invention.

Hereinafter, preferred embodiments of the screen holder according to the present invention will be described in detail with reference to the accompanying drawings.

First, as shown in FIG. 4, the entire surface of the screen holder 100 is curved in a first embodiment, thereby minimizing the loss due to the collision during the collision of the refrigerant introduced through the suction pipe 8 and the refrigerant. By allowing the inlet hole 101 side to be guided to allow the refrigerant to flow without a sudden change in the flow path.

In addition, as a method for fixing the screen 3, the outer surface of the screen holder 100 is cocked (Cocking) in a downward direction as shown in FIG. It may be located at the top or bottom of the (100).

In the second embodiment, as shown in FIG. 5, the central protrusion 202 is formed at the center of the screen holder 200 having a curved surface, and the center protrusion 202 of the screen holder 200 is formed. It has a function of better inducing the flow path of the refrigerant flowing through the suction pipe (8) toward the refrigerant inlet hole (201).

3 is a cross-sectional view of the accumulator to which the screen holder 200 according to the second embodiment is coupled.

In the third embodiment, as shown in FIG. 6, the central protrusion 302 protruding toward the suction pipe side is formed at the center of the screen holder 300, and the outer side where the refrigerant inlet hole 301 is formed is toward the L-tube side. By forming a protruding outer protrusion 303, the loss of the refrigerant flow path and the refrigerant collision is minimized.

On the other hand, as a comparative example, Figure 7 is a comparison of the conventional screen holder structure and the screen holder structure according to the present invention from the side of the flow path, that is, in the prior art shown in (a) the refrigerant via the suction pipe is the upper surface of the screen holder After hitting the angle of approximately 90 ° flows in the direction of the refrigerant inlet hole of the screen holder, a large vortex is formed from the outside of the screen holder, and some of the flow through the inlet hole to the lower side can be seen. In addition, a relatively large parabolic vortex is formed by the pulling force on the L-tube side, and a portion of the large, slow vortex region is formed to the lower part of the accumulator, and flow occurs.

On the contrary, in the present invention shown in (b), when the coolant collides with the upper curved surface of the screen holder, the flow path is changed to the coolant inlet hole direction of the screen holder with a relatively small collision force, and the coolant is further formed with the curved surface of the screen holder. Therefore, it moves to the refrigerant inlet hole of the screen holder without sudden fluctuations in the flow path. Since the screen holder is made of curved surface, the refrigerant inflow hole, which is the flow path of refrigerant, can be processed larger than the conventional flat type screen holder, and the refrigerant flows directly through the inflow hole to the upper part of the L-tube without vortex generation. I can see that I can go.

As a result, according to the present invention, due to the shape of the screen holder close to the flow path of the refrigerant, the refrigerant passing through the suction pipe can avoid vortex generation or sudden fluctuations in the flow path around the screen, thereby improving the suction side loss. It can be seen that the noise due to the refrigerant collision can be reduced.

In the above description, specific embodiments of the present invention have been described and illustrated, but it is obvious that the present invention may be variously modified and implemented by those skilled in the art.

Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments should fall within the appended claims of the present invention.

As described above, the screen holder of the present invention improves the flow path of the refrigerant sucked through the suction pipe and prevents the vortex, thereby reducing the suction loss and increasing the mass flow rate, thereby improving the performance of the entire compressor. It works.

In addition, it is possible to fundamentally suppress the noise source of the fluid due to the sudden flow path change and vortex phenomenon of the suction refrigerant, which will greatly reduce the noise generated by the accumulator.

Claims (6)

A screen serving as a filter of the inflow refrigerant and a screen holder through which the refrigerant from the screen passes while supporting the screen is installed in the cylindrical shell provided with the suction pipe at the top; In an accumulator of a rotary compressor in which an L-tube for guiding a refrigerant in a gaseous phase that has passed through the screen and the screen holder or a vaporized refrigerant in a liquid phase to a compressor main body is connected to a predetermined portion of the shell. The screen holder has a curved surface protruding toward the suction pipe side of the entire surface, The screen holder of the accumulator for a rotary compressor, characterized in that a plurality of refrigerant inlet holes through which the refrigerant passes are formed along the outer side of the screen holder. The method of claim 1, And a curved central projection portion protruding toward the suction pipe within a range that does not cause interference with the refrigerant inlet hole is formed in the central portion of the screen holder. The method according to claim 1 or 2, The outer end of the screen holder is a screen holder of the accumulator for a rotary compressor, characterized in that the coking process in the upper or lower direction to fix the screen. A screen serving as a filter of the inflow refrigerant and a screen holder through which the refrigerant from the screen passes while supporting the screen is installed in the cylindrical shell provided with the suction pipe at the top; In an accumulator of a rotary compressor in which an L-tube for guiding a refrigerant in a gaseous phase that has passed through the screen and the screen holder or a vaporized refrigerant in a liquid phase to a compressor main body is connected to a predetermined portion of the shell. The screen holder forms a central projection with a central portion protruding toward the suction pipe side, The outer side forms an outer protrusion projecting toward the L-tube side in the opposite direction, Screen holder of the accumulator for a rotary compressor, characterized in that a plurality of refrigerant inlet hole is formed on the outer projection. The method of claim 4, wherein The center projection and the outer projection screen holder of the accumulator for a rotary compressor, characterized in that a continuous curved shape. The method of claim 4, wherein The outer end of the screen holder is a screen holder of the accumulator for a rotary compressor, characterized in that the coking process in the upper or lower direction to fix the screen.