KR102038539B1 - Method for controlling the back pressure and the back pressure of the scroll compressor - Google Patents

Method for controlling the back pressure and the back pressure of the scroll compressor Download PDF

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Publication number
KR102038539B1
KR102038539B1 KR1020140135291A KR20140135291A KR102038539B1 KR 102038539 B1 KR102038539 B1 KR 102038539B1 KR 1020140135291 A KR1020140135291 A KR 1020140135291A KR 20140135291 A KR20140135291 A KR 20140135291A KR 102038539 B1 KR102038539 B1 KR 102038539B1
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KR
South Korea
Prior art keywords
back pressure
scroll
shaft
scroll compressor
protrusion
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KR1020140135291A
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Korean (ko)
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KR20160041458A (en
Inventor
박일영
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한온시스템 주식회사
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Priority to KR1020140135291A priority Critical patent/KR102038539B1/en
Publication of KR20160041458A publication Critical patent/KR20160041458A/en
Application granted granted Critical
Publication of KR102038539B1 publication Critical patent/KR102038539B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/28—Safety arrangements; Monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0021—Systems for the equilibration of forces acting on the pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

An apparatus for adjusting back pressure of a scroll compressor according to an embodiment of the present invention may include: a center head having a first protrusion having an end protruding toward a turning scroll of the scroll compressor in one direction; And a turning scroll arranged to face the center head and having a second protrusion having an end portion inclined in one direction so as to move relative to the first protrusion according to the rotation angle of the shaft.
Back pressure control method of the scroll compressor according to an embodiment of the present invention comprises the steps of turning on the power (On) of the air conditioning unit having a scroll compressor and the rotation angle of the shaft; And controlling the back pressure applied to the swing scroll according to the rotation period of the shaft.

Description

Back pressure regulating device of scroll compressor and method for controlling back pressure using same {Method for controlling the back pressure and the back pressure of the scroll compressor}

The present invention is to periodically control the back pressure applied to the swing scroll of the scroll compressor according to the rotation angle of the shaft, and more particularly, to a back pressure regulating device of the scroll compressor and a back pressure control method using the same.

In general, a cooling device provided in a vehicle includes a compressor, a condenser, an expansion valve, and an evaporator, and a compressor compresses the refrigerant gas discharged from the evaporator into a high temperature and high pressure state, which is easy to liquefy, and delivers the same to the condenser. In addition, the compressor plays a role of recirculating the refrigerant by pumping the cooling to continue.

A condenser liquefies by cooling the high-temperature, high-pressure refrigerant gas by exchanging heat with outside air, and an expansion valve expands the liquid refrigerant by adiabatic expansion to lower the temperature and pressure, thereby making it easy to evaporate in the evaporator.

The evaporator absorbs and evaporates heat by evaporating the liquid refrigerant to outdoor air introduced into the room. The outside air is cooled by losing heat to the refrigerant and blown into the car interior by a blower.

Compressor has a reciprocating type to compress the working fluid (refrigerant) to perform the compression while reciprocating, and a rotary type to perform the compression while rotating the movement, the reciprocating type uses a crank to a plurality of pistons to drive the driving force of the drive source There is a crank type to be transmitted to, and a wobble plate type using a swash plate and a wobble plate to be transmitted to the rotary shaft is installed.

In addition, the scroll compressor includes a driving unit, a control unit and a compression unit. The compression unit is a portion compressing the refrigerant by rotating by the rotation driving force generated in the driving unit, and is connected to the rear end of the rotating shaft of the driving unit.

The compression unit includes a swing scroll rotatably mounted to an inner rear end of the driving unit housing, and a fixed scroll for compressing a refrigerant together with the swing scroll, and enters into the compression chamber formed by the relative rotation of the swing scroll and the fixed scroll. Compressed refrigerant is compressed.

The screw compressor operated as described above is applied with a pressure corresponding to the pressure of the discharge refrigerant to the swing scroll according to whether the air conditioner is operating. In this case, a part of the refrigerant discharged to maintain the back pressure toward the swing scroll is applied. A method of maintaining the back pressure in the swing scroll by flowing into the center head is used.

However, this method causes a problem that the back pressure is generated to the turning scroll after the discharged refrigerant flows to the center head, and the back pressure cannot be maintained in proportion to the turning scroll at different pressures. It became.

As a result, the super stable cooling performance of the air conditioner installed in the vehicle is not secured, resulting in dissatisfaction of the occupant in the vehicle.

Republic of Korea Patent Publication No. 10-2013-0011658 (2013.01.30.)

Embodiments of the present invention are intended to control the back pressure applied to the turning scroll in a linear state for each rotation period of the shaft rotated in the scroll compressor.

According to an aspect of the present invention, a center head having a first protrusion inclined in one direction has an end projecting toward a turning scroll of a scroll compressor; And a turning scroll arranged to face the center head and having a second protrusion having an end portion inclined in one direction so as to move relative to the first protrusion according to the rotation angle of the shaft.

The first protrusion is characterized by the inclination of the end is inclined upward toward the turning scroll, the second protrusion is characterized by the inclination of the end is inclined downward toward the center head.

The first and second protrusions are inclined with the same inclination.

The first and second protrusions may be inclined at an inclination angle of 10 degrees or more and 40 degrees or less.

The pivoting scroll is characterized in that the back pressure is applied in a linear state in proportion to the rotation angle of the shaft.

Back pressure control method of the compressor according to an embodiment of the present invention comprises the steps of turning on the power of the air conditioning unit having a scroll compressor (On) and the rotation angle of the shaft; And controlling the back pressure applied to the swing scroll according to the rotation period of the shaft.

The detecting of the rotation angle of the shaft includes detecting back pressure applied to the turning scroll by a predetermined angle according to the rotation angle of the shaft.

Controlling the back pressure applied to the swing scroll in proportion to the rotation period of the shaft includes comparing the actual back pressure value detected according to the rotation angle of the shaft with a preset back pressure value.

Controlling the back pressure applied to the swing scroll in proportion to the rotation period of the shaft includes detecting a separation distance between the swing scroll and the center head when the back pressure applied to the swing scroll is inconsistent with the rotation period of the shaft. do.

Embodiments of the present invention are to periodically control the back pressure applied to the rotating scroll rotated relative to the center head according to the rotation angle of the shaft, thereby increasing the operating efficiency of the scroll compressor, preventing leakage of refrigerant and minimizing unnecessary friction loss. Stable operation of the scroll compressor can be performed.

1 is a view showing a back pressure regulating device of a scroll compressor according to an embodiment of the present invention.
2 is a graph showing a back pressure state according to the inclination angle of the shaft according to an embodiment of the present invention.
3 is a view briefly showing a state in which the back pressure control device of the scroll compressor according to an embodiment of the present invention operates in a high back pressure state.
Figure 4 is a flow chart according to the back pressure control method of the scroll compressor according to an embodiment of the present invention.
FIG. 5 is a view illustrating a comparison between an operating state of a high back pressure and a low back pressure state and a rotation angle of a shaft according to an apparatus for adjusting a back pressure of a scroll compressor according to an embodiment of the present disclosure

A back pressure regulating device of a scroll compressor according to an embodiment of the present invention will be described with reference to the drawings. 1 is a view illustrating a back pressure adjusting device of a scroll compressor according to an embodiment of the present invention, and FIG. 2 is a graph showing a back pressure state according to an inclination angle of a shaft according to an embodiment of the present invention.

1 to 2, the scroll compressor 2 includes a center head 100 disposed inside the compressor housing and a swing scroll 200 disposed at a position facing the center head 100. In addition, the turning scroll 200 is adjusted to a linear state while the back pressure (Back pressure) is made relative to the center head 100.

Prior to the description of the center head 100 and the swinging scroll 200, the back pressure applied to the swinging scroll 200 according to the rotation period of the shaft 10 is repeatedly increased and decreased when the scroll compressor compresses the refrigerant. Is done.

For example, when the rotational angle of the shaft 10 is rotated from 0 degrees to 90 degrees, the back pressure applied to the turning scroll 200 is increased from 680 N to 940 N, and is rotated from 90 degrees to 180 degrees. The back pressure applied to 200 is rapidly increased from 940N to 1280N. For reference, the X axis represents the rotation angle of the shaft 10, and the Y axis represents the back pressure applied to the swing scroll 200.

When the rotational angle of the shaft 10 is rotated from 180 degrees to 270 degrees, the back pressure applied to the turning scroll 200 is reduced from 1280 N to 1000 N, and is reduced to 800 N when the rotation angle is changed from 270 degrees to 360 degrees.

And when the rotation angle of the shaft 10 is rotated from 360 to 720 degrees, it can be seen that the back pressure applied to the turning scroll 200 is periodically repeated, through which the back pressure applied to the turning scroll 200 is the shaft It can be seen that it repeats with a specific period according to the rotation angle of (10).

In addition, since the rotation angle of the shaft 10 when the high back pressure is applied to the swing scroll 200 is different from the rotation angle of the shaft 10 when the low back pressure is applied to the swing scroll 200, the rotation angle of the shaft 10 is different. By precisely adjusting the back pressure of the swing scroll 200 according to the above, it is possible to minimize the operation efficiency of the scroll compressor and unnecessary leakage of the refrigerant.

To this end, the center head 100 according to an embodiment of the present invention includes a first protrusion 110 in which an end portion projecting toward the turning scroll 200 of the scroll compressor 2 is inclined in one direction. The first protrusion 110 has an inclined end portion inclined upward toward the turning scroll 200.

The protruding length of the first protrusion 110 is set through simulation according to the back pressure applied to the turning scroll 200, and is most similar to the turning scroll 200 when high back pressure is applied to the turning scroll 200. It is set on the assumption that a low back pressure is applied where a low back pressure is maintained.

The orbiting scroll 200 is disposed to face the center head 100 and the second protrusion 210 inclined in one direction so as to move relative to the first protrusion 110 according to the rotation angle of the shaft 10. With a turning movement.

The second protrusion 210 has an inclined end that is inclined downward toward the center head 100. Since the second protrusion 210 is inclined with the same inclination as the first protrusion 110 described above, the turning scroll 200 is the center head 100. The relative pressure is periodically made in accordance with the rotational angle of the shaft 10 in which the pivoting movement is made, and the volume of the back pressure chamber is varied.

The reason why the first and second protrusions 110 and 210 have the same inclination is that when the shaft 10 is rotated, the refrigerant changes its pressure to a high pressure state and then discharges, and the shaft rotates at a constant cycle. .

In this case, when the first and second protrusions 110 and 210 are maintained at the same inclination, the rotational scroll 200 is relatively rotated relative to the center head 100, and the periodic rotation angle of the shaft 10 is changed. In this case, responsiveness is improved to reduce refrigerant loss of the scroll compressor 2 and to minimize unnecessary friction loss with the center head 100 to improve the operation efficiency of the scroll compressor 2.

The first and second protrusions 110 and 210 are inclined at an inclination angle of 10 degrees or more and less than or equal to 40, and the angles are configured at the above angles for stable rotation of the turning scroll 200 in which relative rotation is performed.

Preferably, the first and second protrusions 110 and 210 may be configured to have any one of inclination angles of 40 degrees or less through simulation.

The turning scroll 200 is applied with a back pressure in a linear state in proportion to the rotation angle of the shaft 10, the back pressure applied to the turning scroll 200 according to the rotation angle of the shaft 10 is applied with a periodicity. The back pressure applied to the swinging scroll 200 at the specific rotation angle is not rapidly changed, but the back pressure is increased or decreased in proportion to the rotation of the shaft 10 to achieve stable operation of the scroll compressor 2. .

2 or 3, the swinging scroll 200 is operated with relative rotation relative to the center head 100, when the rotational angle of the shaft 10 is 180 degrees and 540 degrees. The back pressure state is maintained.

In this case, the turning scroll 200 maintains the first separation distance h1 spaced apart from the center head 100 at the maximum, whereas the rotation angle of the shaft 10 is 360 degrees at 0 to 90 degrees and 270 degrees. The low back pressure is maintained in the 450 degree section and the 630 degree 720 section, and the turning scroll 200 maintains the second separation distance h2 closest to the center head 100 to maintain the shaft 10. The separation distance changes relative to the rotation to control the operation of the scroll compressor with different back pressures.

4 to 5, in the method for controlling the back pressure of a compressor according to an embodiment of the present invention, the power of the air conditioner unit having the scroll compressor is turned on and the rotation angle of the shaft is sensed (S100). And controlling the back pressure applied to the turning scroll in proportion to the rotation period of the shaft (S200). For reference, the control will be described by the control unit provided in the scroll compressor.

In the method of performing the back pressure control for the scroll compressor, the present invention detects the rotation angle according to the rotation of the shaft (S100), and detects the back pressure applied to the turning scroll by a predetermined angle according to the rotation angle of the shaft (S110).

In the scroll compressor, when the shaft located therein is rotated, the back pressure applied to the swing scroll 200 increases linearly from low back pressure to high back pressure, and then repeats the high back pressure to low back pressure periodically. The control unit senses the back pressure on the turning scroll according to the rotation angle of the shaft.

The rotation angle of the shaft is sensed through a rotation angle sensor (not shown) and transmitted to the controller, and the controller determines whether the shaft is rotated to a normal state by receiving the rotation angle data of the current shaft.

In the case of the present invention, the back pressure applied to the swing scroll is changed with a constant period according to the rotation period of the shaft, for example, when the back pressure is applied to the swing scroll at a low back pressure at the beginning of operation, and the rotation angle of the shaft is increased. Back pressure is applied to the turning scroll in the high back pressure state, and then changes from the low back pressure state to the high back pressure state according to the rotation angle of the shaft.

The control unit monitors the change of the back pressure applied to the turning scroll according to the rotation period of the shaft, compares the actual back pressure value and the preset back pressure value detected according to the rotation angle of the shaft, and is it operating normally? Determine (S210).

The scroll compressor compares the actual back pressure value with the simulated state at design time according to the rotation of the rotating shaft and judges whether it operates normally within the error range, and if the back pressure applied to the rotating scroll does not match the rotation period of the shaft If it detects the separation distance between the turning scroll and the center head (S220).

Since the separation distance is mounted on the scroll compressor with the center head fixed, it is possible to determine whether the turning scroll is operating normally according to the separation distance from the turning scroll. If the separation distance is determined normally, the scroll compressor maintains operation. In addition, if it is determined that the separation distance is different, it is determined to be malfunctioning, it is determined that the scroll compressor is currently operating in an error state.

In this case, the control unit may transmit a separate error signal to recognize the malfunction state to the driver, thereby preventing the failure and damage of the scroll compressor in advance, thereby improving durability and reducing repair costs due to additional failures.

Therefore, it is possible to prevent the occurrence of failure of the installation object in which the scroll compressor is installed in advance, and to perform the optimal control of the scroll compressor.

As mentioned above, although an embodiment of the present invention has been described, those skilled in the art may add, change, delete, or add components within the scope not departing from the spirit of the present invention described in the claims. The present invention may be modified and changed in various ways, etc., which will also be included within the scope of the present invention.

10: shaft
100: center head
110: first protrusion
200: turning scroll
210: second protrusion

Claims (9)

A center head (100) having a first protrusion (110) inclined in one direction with an end projecting toward the turning scroll (200) of the scroll compressor; And
The pivoting is disposed facing the center head 100 and having a second protrusion 210 inclined in one direction so as to move relative to the first protrusion 110 according to the rotation angle of the shaft 10. Back pressure regulating device of the scroll compressor comprising a scroll (200). According to claim 1,
The first protrusion 110,
The end is made of an inclined upward slope towards the turning scroll 200,
The second protrusion 210 is,
Back pressure regulating device of the scroll compressor, characterized in that the end is made of a slope inclined downward toward the center head (100). According to claim 1,
The first and second protrusions 110 and 210,
Back pressure regulating device of the scroll compressor, characterized in that inclined with the same slope. According to claim 1,
The first and second protrusions 110 and 210,
Back pressure regulating device of the scroll compressor, characterized in that the inclination angle is inclined at an inclination angle of 10 degrees to 40 degrees. According to claim 1,
The turning scroll 200,
Back pressure adjusting device of the scroll compressor, characterized in that the back pressure is applied in a linear state in proportion to the rotation angle of the shaft (10). Powering on the air conditioner unit having the scroll compressor and sensing a rotational angle of the shaft (S100); And
Including the step of controlling the back pressure applied to the rotating scroll in accordance with the rotation period of the shaft (S200),
Controlling the back pressure applied to the swing scroll in proportion to the rotation period of the shaft (S200) includes comparing the actual back pressure value detected according to the rotation angle of the shaft with a preset back pressure value (S210). Back pressure control method of scroll compressor. The method of claim 6,
Step (S100) of detecting the rotation angle of the shaft,
And a step (S110) of detecting a back pressure applied to the turning scroll by a predetermined angle according to the rotation angle of the shaft. delete Powering on the air conditioner unit having the scroll compressor and sensing a rotational angle of the shaft (S100); And
Including the step of controlling the back pressure applied to the rotating scroll in accordance with the rotation period of the shaft (S200),
The step S200 of controlling the back pressure applied to the swing scroll in proportion to the rotation period of the shaft detects a separation distance between the swing scroll and the center head when the back pressure applied to the swing scroll is inconsistent with the rotation period of the shaft. Back pressure control method of the scroll compressor comprising a step (S220).
KR1020140135291A 2014-10-07 2014-10-07 Method for controlling the back pressure and the back pressure of the scroll compressor KR102038539B1 (en)

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KR1020140135291A KR102038539B1 (en) 2014-10-07 2014-10-07 Method for controlling the back pressure and the back pressure of the scroll compressor

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Application Number Priority Date Filing Date Title
KR1020140135291A KR102038539B1 (en) 2014-10-07 2014-10-07 Method for controlling the back pressure and the back pressure of the scroll compressor

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KR102038539B1 true KR102038539B1 (en) 2019-10-31

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000249083A (en) 1999-02-26 2000-09-12 Sanyo Electric Co Ltd Scroll fluid machinery
KR100523018B1 (en) 1998-12-23 2005-12-30 엘지전자 주식회사 Compressor Part Support Structure of Scroll Compressor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0514579U (en) * 1991-08-05 1993-02-26 三菱重工業株式会社 Scroll compressor
JPH10184568A (en) * 1996-12-27 1998-07-14 Mitsubishi Heavy Ind Ltd Scroll compressor and its back pressure chamber pressure control valve
KR20130011658A (en) 2011-07-22 2013-01-30 한라공조주식회사 Scroll compressor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100523018B1 (en) 1998-12-23 2005-12-30 엘지전자 주식회사 Compressor Part Support Structure of Scroll Compressor
JP2000249083A (en) 1999-02-26 2000-09-12 Sanyo Electric Co Ltd Scroll fluid machinery

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