KR20040107722A - Accumulator for rotary compressor - Google Patents

Abstract

PURPOSE: An accumulator of a rotary compressor is provided to prevent liquid refrigerant contained in refrigerant from moving directly into a cylinder by blowing and filtering the liquid refrigerant with centrifugal force by a blade formed at the end of a suction pipe and to reduce the number of parts by simplifying the accumulator. CONSTITUTION: A rotary compressor is composed of a motor mechanism unit comprising a stator and a rotor in a casing formed with a suction pipe(111) and a discharge pipe and filled with the predetermined amount of oil and generating driving force and a compression mechanism unit rotated in the cylinder in revolving a rotary shaft to suck in, compress, and discharge the fluid. A piston member is combined at the rotary shaft rotating together with the rotor of the motor mechanism unit. An accumulator for the rotary compressor comprises a housing(110) forming a predetermined inner space and having an upper end connected with the suction pipe and a lower end inserted and combined with a connection pipe(112) communicating to the cylinder and a refrigerant dispersion unit(120) installed at the end of the suction pipe in the housing to disperse centrifugally the refrigerant moving through the suction pipe to the housing.

Description

Accumulator of rotary compressor {ACCUMULATOR FOR ROTARY COMPRESSOR}

The present invention relates to an accumulator of a rotary compressor, and more particularly, to an accumulator of a rotary compressor that separates a liquid refrigerant from a gas refrigerant before being sucked into the compressor.

In general, a rotary compressor applied to an air conditioner or the like is eccentrically coupled to the rotating shaft coupled to the electric mechanism part of the compression mechanism of the compression mechanism, and the rolling piston sucks and discharges the refrigerant while rotating in the compression space of the circular cylinder.

Rotary compressors usually have a liquid refrigerant separation device called an accumulator on the suction side because gas refrigerant and liquid refrigerant may be introduced together by direct suction of the refrigerant.

A rotary compressor having a conventional accumulator is as shown in FIG.

As shown in the drawing, the conventional rotary compressor includes a stator 2 and a rotor 3 which are electric motor parts inside a casing 1 filled with a predetermined amount of oil and having a suction pipe SP and a discharge pipe DP. ), A rotary shaft (4) is press-fitted to the center of the rotor (3), and a compression mechanism for suction-pressing refrigerant gas is provided at the lower portion of the rotary shaft (4).

The compression mechanism is fixed to the inner circumferential surface of the casing 1 and has a circular cylinder 5 which communicates with the suction pipe SP, and an upper bearing 6A which is in close contact with both sides of the cylinder 5 and supported by the rotating shaft 4 therethrough. ) And the lower bearing 6B, the rolling piston 7 eccentrically rotating in the cylinder 5 while rotating in rotation with the rotating shaft 4, and the outer circumferential surface of the rolling piston 7 in contact with the rolling piston 7 A vane (not shown) for dividing the cylinder 5 into a suction space and a compression space while the linear movement is performed during the pivoting movement, and a suction port 5a of the suction pipe SP and the cylinder 5 by being disposed on one side of the casing 1. ) Comprises an accumulator 10 connected in the middle.

The accumulator 10 has a predetermined internal space as shown in FIG. 2, the upper end of which communicates with the suction pipe SP, and the lower end of which connects the connecting pipe 9 so as to communicate with the suction port 5a of the cylinder 5. (11), an oil separation screen (12) installed between the end of the suction pipe (SP) and the end of the connecting pipe (9) to separate the gas refrigerant and the liquid refrigerant from the refrigerant flowing through the suction pipe (SP), A screen holder 13 supporting the separation screen 12 and fixed to the housing 11, and a tube holder supporting the connecting pipe 9 by being disposed at a lower portion thereof with a predetermined distance from the screen holder 13 ( 14).

In the figure, reference numeral 6a denotes a discharge hole, 6b a discharge valve, 8 a muffler, 12a a screen hole, and 14a a holder hole.

Operation of the conventional rotary compressor configured as described above is as follows.

That is, when power is applied to the stator 2, the rotor 3 rotates inside the stator 2, and the rotating shaft 4 rotates with the rolling piston 7 eccentrically rotating in the cylinder 5. In addition, the refrigerant gas is sucked into the suction space of the cylinder (5) in accordance with the eccentric rotation of the rolling piston (7) is continuously compressed to a constant pressure, the pressure of the compression space of the cylinder (5) passes the critical pressure of the casing (1) At the moment when the pressure is higher than the pressure in the cylinder, the discharge valve 6b mounted on the upper bearing 6A is opened, and compressed gas is discharged into the casing 1 in the compression space, and the discharge gas is discharged from the casing 1 and the stator (2). ) Is moved upward through a gap between the stator 2 or between the stator 2 and the rotor 3 and discharged through the discharge pipe DP to the refrigeration cycle system.

At this time, the gas refrigerant from the refrigerant introduced into the housing 11 of the accumulator 10 through the suction pipe SP passes through the oil separation screen 12 and is sucked into the suction space of the cylinder 5 through the connecting pipe 9. On the other hand, the liquid refrigerant is filtered through the oil separation screen 12 and passes through the holder hole 14a provided at the edge of the tube holder 14 through the screen hole 12a and the screen holder 13, and then the housing 11 The liquid refrigerant accumulated at the bottom of the housing 11 is accumulated in the bottom of the housing 11, and is vaporized by the surrounding heat, and the liquid refrigerant rises and repeats a series of processes to be sucked into the suction space of the cylinder 5 through the connecting pipe 9.

However, in the accumulator of the conventional rotary compressor as described above, there is a risk that some liquid refrigerant may flow directly into the cylinder 5 through the center portion of the oil separation screen 12 and also increase the production cost due to the large number of parts. There was this.

The present invention has been made in view of the problems of the accumulator of the conventional rotary compressor as described above, the accumulator of the rotary compressor can not only effectively block the liquid refrigerant flow into the cylinder, but also reduce the number of parts to reduce the production cost It is an object of the present invention to provide.

1 is a longitudinal sectional view showing an example of a conventional rotary compressor.

Figure 2 is a perspective view showing the broken accumulator of the conventional rotary compressor,

3 is a cross-sectional view showing an accumulator of the rotary compressor of the present invention;

4 is an exploded perspective view of the main portion of the accumulator of the present invention;

5 is a cross-sectional view of the main part of the accumulator of the present invention;

6 is a cross-sectional view showing a modification of the main part of the accumulator of the present invention.

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

110 housing 111 suction tube

111a: groove 112: connector

120: refrigerant scattering unit 121: support tube

121a: incision 121b: protrusion

121c: Support leg 121d: wing fixation

122: rotary blade 122a: body portion

122b: wing 123: fixing bolt

124,125: Bearing Washers

In order to achieve the object of the present invention, a rotating shaft which rotates together with a rotor having a suction tube and a discharge tube and generating a driving force by a stator and a rotor inside a casing filled with a predetermined amount of oil, In the rotary compressor including a piston mechanism coupled to the piston member to rotate the inside of the cylinder when the rotary shaft rotates, the suction mechanism compresses and discharges the fluid, having a predetermined internal space and connecting the suction pipe at the top and the cylinder at the bottom An accumulator of a rotary compressor, comprising: a housing for inserting and coupling a connecting tube to communicate with the refrigerant; and a refrigerant scattering unit installed at an end of the suction tube to disperse the refrigerant flowing into the housing through the suction tube in the centrifugal force direction. To provide.

EMBODIMENT OF THE INVENTION Hereinafter, the accumulator of the rotary compressor which concerns on this invention is demonstrated in detail based on one Example shown in an accompanying drawing.

Figure 3 is a cross-sectional view showing an accumulator of the rotary compressor of the present invention, Figure 4 is a perspective view showing the main part of the accumulator of the present invention, Figure 5 is a cross-sectional view of the main part of the accumulator of the present invention, Figure 6 is a main part of the accumulator of the present invention It is sectional drawing which showed the modification about.

As shown in FIG. 1, the accumulator of the rotary compressor according to the present invention includes a housing 110 disposed on one side of the compressor casing (shown in FIG. 1) and having a predetermined internal space. It is installed near the end of the suction pipe 111 is composed of a refrigerant scattering unit 120 for dispersing the refrigerant flowing into the housing 110 through the suction pipe 111 in the centrifugal force direction.

The housing 110 is installed in a direction perpendicular to the ground, the upper end of which connects the suction pipe 111 for guiding the refrigerant to the compression mechanism portion, and the cylinder of the compression mechanism portion (shown in FIG. 1) 5 at the lower portion thereof. It is made by inserting the coupling pipe 112 to directly communicate with.

In the vicinity of the end of the suction pipe 111 to form a groove portion (111a) in an annular shape so that the protrusion (121b) of the support tube 121 to be described later to be uneven.

The connecting pipe 112 is also referred to as a so-called 'L' tube, the upper half of which is inserted into the housing 110, while the lower half of the tube passes through the casing 1 to directly or intermediate sealing tube (unsigned) to the cylinder 5. Communicate with the coupling.

In addition, the connecting pipe 112 is inserted and coupled at a height having a predetermined distance between the upper half end and the refrigerant scattering unit 120 described above.

Refrigerant scattering unit 120 is a support tube 121 is inserted into the end of the suction pipe 111 and coupled to the support tube 121, the refrigerant passing through the support tube 121 in the suction pipe 111 rotatably coupled to the support tube 121 It consists of a rotary blade 122 which rotates by and scatters the refrigerant by centrifugal force.

The support tube 121 forms an incision 121a cut in the axial direction at the upper end inserted into the suction tube 111, and is inserted into the groove 111a of the suction tube 111 on the outer circumferential surface of the incision 121a. The protrusions 121b are formed in an arc shape so as to be formed.

In addition, at the end of the support tube 121, at least three or more support leg portions 121c are formed in the direction of the center of the tube so as to rotatably couple the rotary blades 122 described above, and the tube of the support leg portion 121c is formed. In the center is formed a wing fixing portion (121d) for rotatably coupling the rotary blade (122). The wing fixing portion 121d forms a fastening hole 121e for fastening the fixing bolt 123 for supporting the rotary blade 122.

The rotary blade 122 may be disposed to be positioned outside the end of the suction pipe 111 as shown in FIG. 5 or to be positioned at the end of the suction pipe 111 as shown in FIG. 6. In this case, when the rotary blade 122 is disposed outside the suction pipe 111, the diameter of the rotary blade may be larger than the inner diameter of the suction pipe 111 to further increase the centrifugal force for the liquid refrigerant.

In addition, as shown in FIGS. 3 and 4, the rotary blade 122 protrudes radially from the central body portion 122a and the outer circumferential surface of the body portion 122a to dissipate the refrigerant in the centrifugal force direction 122b. ) In the center of the body portion (122a) is formed a through hole (h) through which the fixing bolt 123 rotatably penetrates.

In the drawings, the same reference numerals are given to the same parts as in the prior art.

Reference numerals 124 and 125 in the drawings denote bearing washers.

The accumulator of the rotary compressor as described above has the following effects.

That is, referring to FIG. 1, when the power is applied to the electric mechanism of the compressor, the rotating shaft 4 rotates together with the rotor 3, and the rolling piston 7 coupled to the eccentric portion (unsigned) of the rotating shaft 4. ) Sucks the refrigerant gas into the suction zone while eccentrically rotating it in the closed space of the cylinder (5) and gradually pushes it into the compression zone to compress it to a certain pressure, and at the point when the pressure in the compression zone becomes higher than the internal pressure of the casing (1) Compressed gas is discharged to the casing (1), and the discharged compressed gas is discharged to the refrigerating cycle apparatus through the discharge pipe (DP) and repeated a series of processes to be sucked again.

In this process, before the refrigerant is sucked into the suction space of the cylinder 5 through the suction pipe 111, the liquid refrigerant or foreign matter in the refrigerant is filtered through a liquid refrigerant separation device called an accumulator. In this case, FIGS. 5 and 6 As in the refrigerant flows through the refrigerant scattering unit 120 provided at the end of the suction pipe 111 to rotate the rotary blade 122 of the refrigerant scattering unit 120 by the flow rate, the rotary blade 122 of Due to the centrifugal force generated during rotation, the refrigerant, in particular, a relatively heavy and highly viscous liquid refrigerant is scattered on the wing portion 122b and scattered toward the inner wall surface of the housing 110, and flows down the inner wall surface to the floor surface. On the other hand, the gas refrigerant rises and is directly sucked into the cylinder 5 through the connection pipe 112.

On the other hand, the liquid refrigerant accumulated on the bottom surface of the housing 110 rises while evaporating by exchanging heat with the surroundings, and the gas refrigerant is sucked into the cylinder 5 through the connection pipe 112 as described above.

In this way, the liquid refrigerant in the refrigerant flowing through the suction pipe can be effectively prevented from entering the cylinder directly through the connecting pipe, and the accumulator for filtering the liquid refrigerant in the refrigerant can be simplified, thereby reducing the number of parts. A reduction in the production cost of the compressor with an accumulator can be expected.

The accumulator of the rotary compressor according to the present invention has a wing such as a propeller at the end of the suction pipe and blows the refrigerant by centrifugal force to filter the liquid refrigerant, thereby effectively preventing the liquid refrigerant in the refrigerant from entering the cylinder immediately. The accumulator can also be simplified to reduce the number of parts, thereby reducing the production cost of the compressor.

Claims (5)

A piston member is coupled to an electric mechanism part generating a driving force by a stator and a rotor inside a casing having a suction pipe and a discharge pipe filled with a predetermined amount of oil, and a rotating shaft that rotates together with the rotor of the electric device part. In the rotary compressor including a compression mechanism for the suction and compression of the fluid discharged while rotating in the interior of the cylinder, A housing having a predetermined internal space, connecting the suction pipe to the upper end, and inserting and coupling the connection pipe to communicate with the cylinder at the lower end, and discharging the refrigerant flowing into the housing through the suction pipe in the direction of centrifugal force. Accumulator of the rotary compressor, characterized in that consisting of a refrigerant scattering unit installed at the end. The method of claim 1, The refrigerant scattering unit comprises a support tube inserted into and coupled to the end of the suction tube, and a rotary blade rotatably coupled to the support tube to rotate by the refrigerant passing through the support tube in the suction tube while scattering the refrigerant by centrifugal force. Accumulator of rotary compressor. The method of claim 2, And a suction pipe forms a groove portion on an inner surface thereof, and a support tube forms a protrusion portion on the outer circumferential surface thereof to insert and fix the groove portion. The method of claim 3, Accumulator of the rotary compressor, characterized in that to form an incision in the axial direction so that the end of the support tube is retracted and stretched elastically when the protrusion of the support tube is inserted into the suction pipe. The method of claim 2, The rotary blade is an accumulator of the rotary compressor, characterized in that coupled to at least the end of the suction pipe or outside the end.