KR100388250B1 - Separating membrane for scroll compressor - Google Patents

Abstract

The diaphragm structure of the scroll compressor according to the present invention includes a sealed container for separating the inside and the outside so that fluid does not flow out from the inside of the compressor, and a low pressure fluid is sucked by being pressed into the sealed container so that an outer peripheral surface thereof is in contact with the inner peripheral surface of the sealed container. Characterized in that the upper frame to be separated between the suction chamber and the discharge chamber through which the high pressure fluid is discharged.

The present invention has an effect that can effectively prevent the problem of noise reduction and the compression performance of the scroll compressor due to the installation of the rotating scroll and the fixed scroll due to the welding installation of the upper diaphragm has been proposed as a conventional problem.

Description

Separating membrane for scroll compressor

The present invention relates to a scroll compressor, and more particularly, to improve the compression performance by improving the position where the diaphragm structure separating high and low pressure in the compressor is placed in the compressor to improve the adverse effect on the scroll during assembly of the compressor. It relates to a diaphragm structure of a scroll compressor capable of.

The scroll compressor combines two swirl scrolls to perform compression by the relative movement of fixed scroll and swing scroll. It is used in room air conditioner or automobile air conditioner because of high efficiency, low noise, small size and light weight. Usefulness is emerging,

1 is a view showing a schematic configuration of a conventional scroll compressor.

Referring to FIG. 1, a configuration of a conventional scroll compressor is described. An airtight container 15 for preventing a fluid from flowing out inside and maintaining the inside at a constant pressure, and a suction pipe 1 for allowing fluid to flow from outside. And a suction scroll 4, a fixed scroll 8 and a pivoting scroll 7 for compressing the fluid sucked from the suction pipe 1, and a stator 2a and a rotation to allow the sucked fluid to be compressed. The motor 2 and the drive shaft 3 which consist of the electron 2b, the drive shaft eccentric part 3a which is provided eccentrically in the center of the drive shaft 3 in the upper end of the said drive shaft 3, and the said drive shaft eccentric part 3a ), An old dam ring 6 for suppressing the rotational movement of the swinging scroll 7 into which the swing scroll 7 is inserted, an upper frame 5 for supporting the motor 2 and the old dam ring 6, and the fixed scroll ( 8) and the high pressure fluid compressed by the turning scroll (7) to discharge And a discharge valve 9 for discharging, a check valve 10 for discharging high pressure fluid when the pressure rises above a certain level, an upper cell 13 for accumulating high pressure fluid in a predetermined space, and The upper diaphragm 12, the discharge chamber 11 in which the upper cell 13 and the high pressure fluid are collected, and the discharge tube 14 fastened to the discharge chamber 11 to discharge the high pressure fluid. consist of.

Referring to the operation of the scroll compressor having such a configuration, in the conventional scroll compressor, when the power is applied to the motor 2 to rotate the drive shaft 3, the drive shaft eccentric portion 3a of the upper drive shaft 3 and the turning scroll As a result of the interaction with (7), the swinging scroll (7) is an orbital motion, which is the orbital motion of the orbiting scroll (7) generates a compressive force to compress the fluid in interaction with the fixed scroll (8), The low pressure fluid to be compressed is provided through the suction pipe 1 and the suction chamber 4.

On the other hand, the suction pipe 1 is a low-pressure gaseous fluid is passed through the evaporator (not shown) of the normal refrigeration cycle.

Further, the high pressure fluid compressed by the interaction between the swing scroll 7 and the fixed scroll 8 is first collected in the discharge chamber 11 through the discharge port 9 and the check valve 10. It is discharged through the discharge pipe (14). In addition, the high pressure fluid discharged through the discharge pipe 14 is condensed through a condenser (not shown) of a general refrigeration cycle.

FIG. 2 is a view for explaining the configuration of the fixed scroll and the turning scroll as described in FIG. 1.

Referring to FIG. 2, the fixed wrap 8a formed in the involute shape below the fixed scroll 8 and the swing wrap 7a formed in the involute shape above the swing scroll 7 are staggered. It is inserted. A boss portion 7b is formed below the swing scroll 7 to insert the drive shaft eccentric portion 3a so that the rotational force of the drive shaft 3 is eccentrically transmitted to the swing scroll 7.

Moreover, the 1st fixed groove 7c processed in the outer periphery of the turning scroll 7 is inserted in the 1st key 6a formed in the upper surface of the old dam ring 6, and the rotating movement of a turning scroll is suppressed.

Then, the second key 6b formed on the lower surface of the old dam ring 6 is inserted into the second fixing groove 5a formed on the upper surface of the upper frame 5 so that the old dam ring 6 is the upper frame 5. Is fixed against.

With reference to the configuration, the compression phenomenon occurring in the scroll compressor will be described in detail with reference to the drawings.

3 is a cross-sectional view for explaining how the low pressure fluid is compressed by the fixed scroll and the swing scroll.

Referring to FIG. 3, when the low-pressure gaseous fluid passing through an evaporator (not shown) is injected into the compression space P formed between the turning wrap 7a and the fixed wrap 8a, the suctioned low-pressure gaseous fluid is It is compressed along the shape of the compression space P which changes according to the orbital motion of the swinging scroll 7, and FIG. 3 shows the change of the compression space P and the fluid filled in the compression space P. The change state of the space to be compressed is indicated by an arrow.

On the other hand, after the compression process proceeds, the high pressure fluid is discharged through the discharge port 9.

In order to prevent the fluid from leaking during the compression process, the turning wrap 7a and the fixed wrap 8a are operated such that the airtight state is maintained between the turning wrap 7a and the fixed wrap 8a. It is an important issue for the whole scroll compressor.

Figure 4 is an enlarged partial view showing an upper portion of a conventional scroll compressor.

Referring to FIG. 4, in the conventional scroll compressor, the high pressure fluid compressed by the fixed scroll 8 and the swinging scroll 7 is collected in the discharge chamber 11, and the low pressure fluid before compression is supplied to the suction chamber 4. The high pressure fluid and the low pressure fluid are gathered so that they are not mixed with each other due to the separator structure of the upper diaphragm 12.

On the other hand, the upper diaphragm 12 is installed in the hermetic container 15, the motor 2, the turning scroll 7 and the fixed scroll 8 is installed, the fastening bolt 12a is used to the fixed scroll 8 In order to be fastened to the upper side and to seal the discharge chamber 11, the inner circumferential surface of the upper diaphragm 12 is welded to the upper outer surface of the sealed container 15.

However, in such a fastening method, thermal deformation of the upper diaphragm 12 itself generated while the upper diaphragm 12 is welded to the sealed container 15 is transmitted to the fixed scroll 8 through the fastening bolt 12a to fix the wrap. Since the position of 8a becomes different from the originally intended position, the installation position of the turning wrap 7a and the fixed wrap 8a will eventually shift | deviate.

This misalignment of the swing wrap 7a and the fixed wrap 8a causes a leak of the fluid while the fluid is being compressed, and the leak of the fluid causes a poor performance of the compressor.

In addition, the misalignment of the turning wrap 7a and the fixed wrap 8a causes a lot of noise at the contact portion between the turning wrap 7a and the fixed wrap 8a, which is reached while the turning scroll 7 is being rotated. There is a problem that occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the fluid leakage due to the poor installation of the swing wrap and the fixed wrap that occurred during the installation of the upper diaphragm separating the high pressure fluid and the low pressure fluid, and thus An object of the present invention is to provide a diaphragm structure of a scroll compressor that can effectively suppress poor performance and yield better compression performance.

1 is a view for explaining a schematic configuration of a conventional scroll compressor.

2 is a view for explaining the configuration of the fixed scroll and the swing scroll of the conventional scroll compressor.

3 is a cross-sectional view illustrating a state in which a fluid is compressed by a fixed scroll and a swing scroll of a conventional scroll compressor.

Figure 4 is an enlarged partial view showing an upper portion of a conventional scroll compressor.

5 is a longitudinal sectional view illustrating a diaphragm structure of the scroll compressor according to the present invention.

<Description of the symbols for the main parts of the drawings>

1, 21: suction pipe 2: motor

2a: stator 2b: rotor

3, 31: drive shaft 3a: drive shaft eccentric portion

4, 32: suction chamber 5, 29: upper frame

6: Oldhamling 7, 23: Slewing Scroll

8, 24: fixed scroll 9: discharge port

10, 25: check valve 11, 26: discharge chamber

12: upper diaphragm 12a: fastening bolt

13, 30: upper cell 14, 27: discharge tube

15, 22: airtight container 28: sealing part

29a: suction flow path

In order to achieve the above object, the diaphragm structure of the scroll compressor according to the present invention includes a sealed container for separating the inside and the outside so that fluid does not flow out from the inside of the compressor, and the outer peripheral surface is pressed into the sealed container so that the outer peripheral surface is in contact with the inner peripheral surface of the sealed container. It characterized in that the upper frame to be separated between the suction chamber in which the low pressure fluid is sucked and the discharge chamber in which the high pressure fluid is discharged.

The diaphragm structure of the scroll compressor as introduced will be described with reference to a preferred embodiment of the present invention. However, the detailed description of the conventionally known parts will be avoided, and the parts necessary for the practice of the present invention will be described in detail.

5 is a longitudinal cross-sectional view illustrating a diaphragm structure of the scroll compressor according to the present invention.

As disclosed in FIG. 5, in the present invention, a sealed container 22 is provided to be sealed to prevent the fluid from leaking to the outside, and is formed at a predetermined position on an outer circumferential surface of the sealed container 22 to allow the fluid to be sucked from the outside. A suction scroll 21, a fixed scroll 24 provided to compress the fluid introduced from the suction pipe 21, and a pivoting scroll 23 for mating the fixed scroll 24 to compress the fluid. And an upper frame 29 which is installed on the lower surface of the fixed scroll 24 to be pressed into the sealed container 22 so as to prevent leakage of the fluid, and an outer circumferential surface of the upper frame 29 and sealed. The high pressure fluid compressed by the sealing portion 28 and the fixed scroll 24 and the turning scroll 23 to be inserted between the inner circumferential surface of the container 22 to make the sealing of the upper frame 29 more complete A check valve 25 for discharging under a proper pressure, a discharge chamber 26 in which high-pressure fluid discharged through the check valve 25 is collected, and a discharge chamber 26 are provided to be sealed upward. And the discharge tube 27 for discharging the high pressure fluid collected in the discharge chamber 26.

In particular, in the scroll compressor to which the idea of the present invention is applied, the upper diaphragm 12 (see FIG. 1 of FIG. 1), which is provided to separate the high pressure fluid and the low pressure fluid from the conventional scroll compressor, is not provided, and the upper diaphragm 12 is provided. Instead, the upper frame 29 is pressed into the upper side of the sealed container 22 so that the high pressure fluid and the low pressure fluid are not mixed. The high-pressure fluid passing through the check valve 25 is not the discharge chamber (see 11 in FIG. 1) formed of the upper diaphragm 12 and the upper cell (see 13 in FIG. 1), but the upper diaphragm 12. This is not installed and is collected in the discharge chamber 26 consisting of the fixed scroll 24 and the upper cell 30.

The operation of the embodiment of the present invention having such a configuration will be described in detail.

When power is applied to the motor and the drive shaft is rotated, the turning scroll 23 rotates, and the turning scroll 23 that rotates sucks a low pressure fluid by interacting with the fixed scroll 24 and presses the high pressure. Will be compressed.

In addition, the low-pressure fluid to be sucked is a high-pressure fluid evaporated in the evaporator (not shown) is sucked through the suction pipe 21, and collected in the suction chamber 32, the suction flow path 29a at the same time as the operation of the drive shaft 31. Is sucked into the orbiting scroll (23) through.

The fluid changed to high pressure due to the compression action of the swing scroll 23 and the fixed scroll 24 is discharged to the discharge chamber 26 through the check valve 25 when the pressure reaches an appropriate pressure, and the discharge chamber 26 The high pressure fluid gathered in) is discharged to the condenser (not shown) through the discharge pipe 27 and cooled while passing through the condenser.

The problem of the separation of the low pressure fluid before compression and the high pressure fluid after compression, which is essential for the operation of such a scroll compressor, is due to the secondary component of the conventional upper diaphragm (see 12 in FIG. 1). Rather than being achieved, the high pressure fluid stored in the discharge chamber 26 flows out into the suction chamber 32 where the low pressure fluid is collected by allowing the upper frame 29 to be press-fitted into the sealed container 22 so that there is no gap. This is accomplished by avoiding this.

On the other hand, the structure of the present invention in which the upper frame 29 is press-fitted so that the discharge chamber is sealed, in order to maintain the seal more completely, in this embodiment, between the outer peripheral surface of the upper frame 29 and the inner peripheral surface of the sealed container 22. The sealing part 28 is added.

In addition, the upper frame 29 is provided with a suction flow path 29a in order to allow the low pressure fluid to be drawn in the swing scroll 23 so that the low pressure fluid stored in the suction chamber 32 can be sucked. Doing.

On the other hand, the inner surface of the outer circumference of the upper cell 30 is welded to the outer surface of the upper end of the sealed container 22, due to the heat generated during the welding only by thermal deformation of the closed container 22 and the upper cell 30. In addition, the influence on the fixed scroll 24 and the turning scroll 23 will be said to be small enough to be ignored.

As described above, the diaphragm structure of the scroll compressor according to the present invention solves the problem of separation of the high pressure fluid and the low pressure fluid, which has been achieved by using a special structure of the conventional upper diaphragm. In order to allow the upper frame to be used naturally as a diaphragm structure at the same time, the problem of poor installation of the fixed scroll and the revolving scroll, which has been generated to install the upper diaphragm, is effectively eliminated.

As described above, the present invention can play a role in the structure of the diaphragm which must be used to separate the high pressure and low pressure fluid in the scroll compressor, without affecting the performance of the compressor at all. As it is characterized by the above, it is easy for a person skilled in the art to understand the spirit of the present invention to make the same embodiment by the selection or addition of components within the scope of the same spirit.

As described above, the present invention has an effect that can effectively prevent the problem of deterioration of compression performance and noise generated due to the poor installation of the swing scroll and the fixed scroll due to the welding installation of the upper diaphragm has been proposed as a conventional problem.

Claims (2)

A hermetically sealed container for separating the inside and the outside so that fluid does not flow out from the inside of the compressor, a suction chamber in which low pressure fluid is sucked by injecting the outer circumferential surface into the inner circumferential surface of the sealed container, and a discharge chamber through which the high pressure fluid is discharged. Diaphragm structure of a scroll compressor, characterized in that consisting of an upper frame to be separated between. The method of claim 1, The diaphragm structure of the scroll compressor, characterized in that the sealing portion is provided on the contact surface of the upper frame and the sealed container to more fully separate the high pressure fluid and the low pressure fluid.