CN209743154U

CN209743154U - Electric compressor device

Info

Publication number: CN209743154U
Application number: CN201920461745.6U
Authority: CN
Inventors: 李成旭
Original assignee: Hyundai Mobis Co Ltd
Current assignee: Hyundai Mobis Co Ltd
Priority date: 2018-06-11
Filing date: 2019-04-08
Publication date: 2019-12-06
Anticipated expiration: 2029-04-08
Also published as: KR20190140240A

Abstract

The utility model relates to an electrodynamic type compressor arrangement, include: a casing through the outer side surface of which a refrigerant inlet is formed; a center plate fixed inside the housing; a rotating shaft rotatably provided in the housing and the center plate; a driving motor fixed inside the housing and rotating the rotation shaft; the wear-resisting plate is arranged in the direction of one end of the central plate; an orbiting scroll disposed in a direction of one end of the wear plate and orbiting by a rotation shaft; a fixed scroll disposed in one end direction of the orbiting scroll, the orbiting scroll orbiting inside the fixed scroll; and a head part disposed in one end direction of the fixed scroll and having a refrigerant outflow port formed at an outer side surface thereof, wherein a back pressure ring is installed in the other end direction of the orbiting scroll, and a cutout part is formed in the back pressure ring to open in a radial direction by a pressure of the refrigerant.

Description

Electric compressor device

Technical Field

the utility model relates to an electrodynamic compressor device, more in detail, when the compressor drive, reduce the wearing and tearing of orbiting scroll (orbit scroll), adjust the pressure of refrigerant to can improve the electrodynamic compressor device of the efficiency of compressor.

Background

In general, a compressor used in a refrigeration apparatus for an automobile sucks an evaporated working fluid from an evaporator, and then changes the working fluid to a high-temperature and high-pressure state in which the working fluid is easily liquefied, and transfers the working fluid to a condenser.

In addition, the portion of the compressor that compresses the working fluid includes: a reciprocating type in which compression is performed while reciprocating and a rotary type in which compression is performed while rotating.

The above-mentioned rotation type includes: a vane rotary type using a rotating shaft and a vane, and a scroll type using a fixed scroll and an orbiting scroll which are coupled to each other.

Among them, the scroll type is roughly classified into a low pressure type and a high pressure type according to the pressure of a refrigerant filled in an inner space of a casing thereof, and the low pressure type scroll compressor is a type of: the suction pipe communicates with the internal space of the housing, and the discharge pipe communicates with the discharge side of the compression unit, thereby indirectly sucking the refrigerant into the compression chamber, and in contrast, the high-pressure scroll compressor is configured as follows: the suction pipe is in direct communication with a suction side of the compression unit, and the discharge pipe is in communication with the internal space of the casing, thereby directly sucking the refrigerant into the compression chamber.

in the low-pressure scroll compressor, an inner space of a housing is divided into a suction space and a discharge space, and a compression unit is disposed between the suction space and the discharge space, and as a method of sealing between a fixed scroll and an orbiting scroll in the low-pressure scroll compressor, a tip seal (tip seal) method and a back pressure method are disclosed.

Wherein, the top end sealing mode is as follows: a tip seal is provided on the front end face of the wrap of each scroll, and the tip seal is brought into close contact with the opposite mirror plate portion to seal between the compression chambers.

More specifically, according to the tip seal method, a plate mounting groove is formed in the outer periphery of the other side surface of the center plate mounted inside the case, and a tip seal groove is formed in the plate mounting groove.

And, when the tip seal is installed in the tip seal groove, a wear plate (wear plate) is installed in the plate installation groove.

As described above, after the tip seal and the wear plate are disposed in the center plate, the other side of the center plate and one side of the orbiting plate contact each other.

At this time, the other side surface of the wear plate is also in contact with one side surface of the orbiting plate.

That is, the tip seal is in close contact with one side surface of the wear plate disposed on the other side of the center plate, and the space on both sides is sealed with respect to the wear plate, so that the low pressure portion and the high pressure portion facing each other are sealed with each other in the refrigerant flow path, and the low pressure and the discharge of the refrigerant are smoothly realized.

On the other hand, in the conventional compressor, there is a problem that a contact surface between the orbiting scroll and the wear plate is damaged due to direct friction between one side surface of the orbiting scroll and the other side surface of the wear plate when the compressor is driven.

Further, when the compressor is driven for a long period of time, the tip seal in close contact with the surface of the wear plate is hardened by friction and heat, and a seal in which the rubber O-ring is stretched in the outer diameter direction with the aid of back pressure is required.

Prior art documents

Patent document

(patent document 1) registered patent publication No. 10-1151206(2012.05.16)

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The present invention has been made in view of the above circumstances, and an object thereof is to provide an electric compressor device which reduces wear of orbiting scrolls and adjusts pressure of a refrigerant, thereby improving an effect of a compressor.

Means for solving the problems

according to the utility model discloses an electrodynamic type compressor device includes: a casing through which a refrigerant inlet port penetrates; a center plate fixed inside the case; a rotating shaft rotatably supported by the housing and the center plate; a driving motor fixed inside the housing and rotating the rotation shaft; the wear-resisting plate is arranged in the direction of one end of the central plate; an orbiting scroll disposed in a direction of one end of the wear plate and orbiting by the rotating shaft; a fixed scroll disposed in one end direction of the orbiting scroll, the orbiting scroll orbiting inside the fixed scroll; and a head part disposed in one end direction of the fixed scroll, a refrigerant outflow port formed at an outer side surface of the head part, a back pressure ring mounted in the other end direction of the orbiting scroll, the back pressure ring having a cutout part formed so as to be expanded in a radius direction by a pressure of the refrigerant.

The backpressure ring is made of PTFE (Polytetrafluoroethylene) material.

When intermediate pressure is applied to the back pressure ring, the cut-out portion is opened by a length less than or equal to 2% of the outer diameter of the back pressure ring.

An auxiliary ring is arranged between the central plate and the back pressure ring.

The auxiliary ring is made of spring steel (SPRING STEEL).

The orbiting scroll includes: the orbiting scroll plate is a vertically arranged disc shape; an orbiting scroll protruding from one surface of the orbiting scroll mirror plate in a spiral shape in a horizontal direction; a back pressure hole penetrating the orbiting scroll plate from one surface to the other surface; and a back pressure chamber surrounded by the other surface of the wear plate and the center plate.

The fixed scroll includes: a disk-shaped fixed scroll plate vertically arranged; a discharge port penetrating the center of the fixed scroll plate from one surface to the other surface; a valve disposed on one end face of the fixed scroll mirror plate for selectively opening or closing the ejection port; a wall surface protruding from the outer peripheral surface of the fixed scroll plate in the other surface direction in the horizontal direction; and a spiral fixed scroll protruding from the other surface of the fixed scroll plate in a horizontal direction so as to be inserted with being shifted by 180 degrees with respect to the orbiting scroll.

The electric compressor device includes a compression chamber, the compression chamber is formed by the orbiting scroll runner plate, the orbiting scroll wrap, the fixed scroll runner plate and the fixed scroll wrap, the compression chamber is right through the rotation of the orbiting scroll and the refrigerant and the working oil are compressed.

The back pressure hole makes the compression chamber and the back pressure chamber communicate with each other.

The head includes a gas-liquid separation chamber that communicates with the compression chamber through the discharge port and separates the refrigerant and the working oil pressurized in the compression chamber.

The center plate is formed with a first refrigerant recovery hole communicating one surface of the center plate and an inner circumferential surface surrounding the back pressure chamber with each other, and the wall surface is formed with a second refrigerant recovery hole formed between the gas-liquid separation chamber and the first refrigerant recovery hole so that the gas-liquid separation chamber and the first refrigerant recovery hole communicate with each other.

A pressure reducing member is attached to the second refrigerant recovery hole.

Effect of the utility model

According to the utility model discloses an electrodynamic type compressor unit, backpressure ring stop form in the refrigerant leakage of the internal intermediate pressure of back pressure chamber to prevent to flow in the refrigerant leakage of the internal intermediate pressure of back pressure chamber, have the effect that makes the orbiting scroll float effectively.

Further, when the refrigerant excessively flows into the back pressure chamber and the pressure of the refrigerant rises from the intermediate pressure to the high pressure, the cutout portion opens in the radial direction, a part of the intermediate pressure of the refrigerant leaks between the cutout portions opening in the radial direction, and a part of the high pressure of the refrigerant in the back pressure chamber leaks, so that the pressure of the back pressure chamber can be maintained at the intermediate pressure.

In addition, the auxiliary ring prevents one surface of the wear plate from directly contacting with the other surface of the orbiting scroll runner plate, so that when the orbiting scroll runner plate rotates, the other surface of the orbiting scroll runner plate is not damaged due to friction with the one surface of the wear plate, and the effect of improving the durability of the orbiting scroll is achieved.

The pressure reducing member is installed inside the second refrigerant recovery hole to reduce the high pressure of the refrigerant moving from the discharge portion to the back pressure chamber through the second refrigerant recovery hole, and the back pressure chamber can maintain the pressure of the refrigerant at an intermediate pressure, thereby improving the operation efficiency of the compressor.

in addition, a valve is formed on one surface of the fixed scroll plate to selectively open or close the discharge port 740, thereby effectively preventing the refrigerant of low pressure formed in the compression chamber from being discharged from the compression chamber to the head through the discharge port before reaching high pressure.

Drawings

Fig. 1 is a sectional view showing an electric compressor device according to an embodiment of the present invention.

Fig. 2 is an operation diagram of an electric compressor device according to an embodiment of the present invention.

Fig. 3 and 4 are side views showing a back pressure ring according to an embodiment of the present invention.

Fig. 5 is an operational view illustrating an operation state of a valve according to an embodiment of the present invention.

Fig. 6 is a sectional view illustrating a flow state of the refrigerant flowing to the first refrigerant recovery hole and the second refrigerant recovery hole according to an embodiment of the present invention.

Reference numerals

100: a housing; 110: a refrigerant inflow port; 200: a center plate; 210: an eccentric stabilizer; 220: a first refrigerant recovery hole; 300: a rotating shaft; 310: a through hole; 320: a pressure reducing device; 400: a drive motor; 410: a stator; 420: a rotor; 500: a wear plate; 600: an orbiting scroll; 610: an orbiting scroll plate; 620: an orbiting scroll wrap; 630: a back pressure hole; 640: a back pressure chamber; 650: a back pressure ring; 651: a cut-out portion; 660: an auxiliary ring; 700: a fixed scroll; 710: a fixed scroll plate; 720: a fixed scroll wrap; 730: a compression chamber; 740: an ejection port; 750: a valve; 751: a stopper; 760: a wall surface; 761: a second refrigerant recovery hole; 762: a pressure reducing member; 800: a head portion; 810: a refrigerant outflow port; 820: a gas-liquid separation chamber.

Detailed Description

the advantages and features of the invention and the methods of accomplishing the same will become apparent from the following detailed description of the embodiments and the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but is realized in a different manner, and the present embodiment is used to make the disclosure of the present invention more complete, and is provided to inform a person skilled in the art of the present invention completely, and the present invention should be defined according to the description of the claims. On the other hand, the terms used in the present specification are used for describing the embodiments and are not used for limiting the present invention. In this specification, the singular includes the plural unless specifically stated otherwise herein. The term "comprises" or "comprising" when used in this specification does not exclude the presence or addition of one or more other elements, steps, operations and/or components other than those mentioned.

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

Fig. 1 is a sectional view showing an electric compressor device according to an embodiment of the present invention,

Fig. 2 is an operation diagram of an electric compressor device according to an embodiment of the present invention, fig. 3 and 4 are side views illustrating a back pressure ring according to an embodiment of the present invention, fig. 5 is an operation diagram illustrating an operation state of a valve according to an embodiment of the present invention, and fig. 6 is a sectional view illustrating a flow state of refrigerant flowing through a first refrigerant recovery hole and a second refrigerant recovery hole according to an embodiment of the present invention.

referring to fig. 1 to 6, the electric compressor device according to the present embodiment includes a housing 100, a center plate 200, a rotation shaft 300, a driving motor 400, a wear plate 500, an orbiting scroll 600, a fixed scroll 700, and a head 800.

the case 100 has a refrigerant inlet 110 formed through an outer surface thereof, the refrigerant inlet 110 allows a low-pressure refrigerant to flow from the outside, and the case 100 and the head 800 are screwed to each other, thereby forming an appearance of the electric compressor device according to the present invention.

The housing 100 protects various components such as the center plate 200, the rotary shaft 300, and the driving motor 400 from external force, and firmly supports the various components housed therein.

The center plate 200 is fixed inside the housing 100, and supports a rotary shaft 300 rotatably fixed inside the housing 100.

The center plate 200 is formed with a first refrigerant recovery hole 220.

As shown in fig. 1 and 2, the first refrigerant recovery holes 220 serve to supply the refrigerant to the back pressure chamber 640 of the orbiting scroll 600 by communicating with each other from one surface of the center plate 200 to the inner circumferential surface of the center plate 200 constituting the back pressure chamber 640.

the rotary shaft 300 is rotatably supported by penetrating the inner surface of the other end of the housing 100 and the center of the center plate 200, and is mounted inside the housing 100, and the rotary shaft 300 is rotated by the operation of the driving motor 400 according to the driving principle of the driving motor 400 mounted on the outer circumferential surface of the rotor 420.

A through hole 310 is formed in the center of the rotating shaft 300 such that one end and the other end communicate with each other, and the pressure reducing device 320 is disposed inside the through hole 310.

The pressure reducing device 320 reduces the pressure of the intermediate-pressure refrigerant flowing in from one end of the rotary shaft 300 to the suction pressure, so as to be reduced to a pressure similar to the suction pressure around the casing 100.

The refrigerant that has flowed through the through-hole 310 and has been depressurized by the depressurizing device 320 is discharged to the outside of the rotary shaft 300 through the other end of the rotary shaft 300, which is the same as the known art, and a detailed description thereof is omitted to avoid obscuring the gist of the present invention.

the driving motor 400 is a driving source that makes a rotational power of the compressor, is fixed inside the housing 100, and rotates the rotational shaft 300.

such a driving motor 400 includes a STATOR 410(STATOR) and a ROTOR 420 (ROTOR).

Preferably, the stator 410 is formed of an electromagnet and fixed to the inner circumferential surface of the housing 100 by press-fitting or the like.

The stator 410 is a hollow cylindrical member, and has a through hole formed on a central axis thereof, into which the rotor 420 is inserted, and a plurality of ribs (rib) protruding radially inward on an inner circumferential surface thereof and arranged at regular intervals in a circumferential direction, thereby forming the through hole.

at this time, the reinforcing ribs extend in the axial direction of the stator 410 for winding the winding coil.

The rotor 420 is a portion coaxially mounted inside the stator 410 to be rotationally driven, and is rotatably inserted into a through hole in the center of the stator 410.

The rotor 420 is a member that rotates the rotary shaft 300 by interaction with the stator 410, and is rotationally driven by interaction with the stator 410 according to a driving principle of a motor when the stator 410 is excited.

Therefore, the rotary shaft 300 is rotatably supported at the center plate 200 and the case 100 by bearings so as to be easily rotated by the rotor 420.

The wear plate 500 is installed in the direction of one end of the center plate 200, one side of the wear plate 500 contacts with the other side of the orbiting scroll 600, and the other side of the wear plate 500 contacts with one side of the center plate 200.

Accordingly, one surface of the wear plate 500 is in contact with the other surface of the orbiting scroll 600, and the other surface of the wear plate 500 is in contact with one surface of the center plate 200, thereby sealing spaces at both sides of the wear plate 500 with each other, thereby sealing a low pressure portion and a high pressure portion opposite to each other in a refrigerant flow path, and smoothly realizing a low pressure and discharge of a refrigerant.

The orbiting scroll 600 is disposed in a direction of one end of the wear plate 500, and one end of the orbiting scroll 600 is fixed to the rotary shaft 300 to orbit by the rotary shaft 300.

Such an orbiting scroll 600 includes an orbiting scroll mirror plate 610, an orbiting scroll wrap 620, a back pressure hole 630, a back pressure chamber 640, and a back pressure ring 650.

The orbiting scroll plate 610 is formed in a vertically arranged disk shape, is accommodated in the housing 100, and is arranged in a direction of one end of the wear plate 500.

The orbiting scroll plate 610 is fixed to the rotary shaft 300 by the eccentric stabilizer 210, and the rotary shaft 300 is rotated by the rotational driving force generated by the driving motor 400.

the orbiting scroll wrap 620 is formed in a SPIRAL (SPIRAL) shape protruding from one surface of the orbiting scroll mirror plate 610 in a horizontal direction.

On the other hand, the orbiting scroll 620 has a length such that one end is spaced apart from the other surface of the fixed scroll 720 by a predetermined interval in a non-operation state of the compressor.

In addition, when the orbiting scroll 600 orbits after the compressor is operated, as shown in fig. 2, the orbiting scroll mirror plate 610 floats up toward the fixed scroll 700, and thus one end of the orbiting scroll wrap 620 contacts the other surface of the fixed scroll 700.

The back pressure hole 630 penetrates from one surface of the orbiting scroll plate 610 to the other surface direction, so that the back pressure chamber 640 and a compression chamber 730 described later communicate with each other, and a position where the pressure of the back pressure chamber 640 is actively adjusted can be set.

This makes it possible to maintain the optimum back pressure for each operating condition of the compressor device, and to optimize the performance of the compressor.

the back pressure chamber 640 is surrounded by the other surface of the wear plate 500 and the center plate 200, and the intermediate-pressure refrigerant decompressed by the decompression member 762 flows into the back pressure chamber 640 inside a second refrigerant recovery hole 761 described later.

accordingly, the orbiting scroll 600 floats up in one end direction by the pressure of the refrigerant flowing into the back pressure chamber 640 when the compressor is operated.

On the other hand, it is preferable that the eccentric stabilizer 210 for fixing the orbiting scroll plate 610 to the rotation shaft 300 is formed in the back pressure chamber 640.

the back pressure ring 650 is made of PTFE (Polytetrafluoroethylene) and disposed in the direction of the other end of the orbiting scroll 600, and more particularly, the back pressure ring 650 is disposed on the outer circumferential surface of the orbiting scroll mirror plate 610 in the direction of the other end and in surface contact with one surface of the wear plate 500.

Such a back pressure ring 650 prevents the intermediate-pressure refrigerant flowing into the back pressure chamber 640 from leaking.

Thus, the back pressure ring 650 prevents leakage of the low-pressure refrigerant flowing into the back pressure chamber 640, and thus the orbiting scroll 600 can be efficiently floated.

In particular, the back pressure ring 650 is made of PTFE, so that the orbiting scroll 600 is elastically deformed when floating in the direction of the fixed scroll 700, and can effectively seal between the orbiting scroll mirror plate 610 and the wear plate 500.

On the other hand, if an excessive amount of low-pressure refrigerant flows into the back pressure chamber 640 and the intermediate pressure of the refrigerant rises to a high pressure, the orbiting scroll 600 floats up excessively in the direction of one end, which may reduce the operation efficiency of the compressor.

Therefore, the back pressure ring 650 of the present invention is formed with the notch portion 651.

As shown in fig. 3, when the refrigerant is at the intermediate pressure in the back pressure chamber 640, the notch portion 651 is kept closed to prevent the refrigerant from leaking from the back pressure chamber 640, and when an excessive amount of refrigerant flows into the back pressure chamber 640 and the pressure of the refrigerant rises from the low pressure to the intermediate pressure, the notch portion 651 opens in the radial direction due to the intermediate pressure of the refrigerant, as shown in fig. 4.

At this time, a part of the pressure of the refrigerant leaks between the notches 651 that open in the radial direction, out of the intermediate pressure of the refrigerant.

thereby, in the back pressure chamber 640, a part of the intermediate pressure of the refrigerant is leaked, and the pressure of the back pressure chamber 640 can be maintained at a low pressure.

that is, the intermediate pressure of the refrigerant formed in the back pressure chamber 640 leaks a portion through the notch portion 651, and the pressure of the refrigerant is maintained at a low pressure, thereby improving the operation efficiency of the compressor.

In addition, when the intermediate pressure of the refrigerant is applied to the above-described back pressure ring 650, the cutout portion 651 is preferably opened by a length of about 2% or less of the outer diameter of the back pressure ring 650.

On the other hand, the notch 651 is formed with a stepped portion.

When the notch portion 651 is closed, the stepped portions are engaged with each other, so that the back pressure chamber 640 can be more effectively sealed.

On the other hand, in other embodiments of the present invention, an auxiliary ring 660 may be disposed between the back pressure ring 650 and the wear plate 500.

The auxiliary ring 660 is made of spring steel (SPRING STEEL), and is disposed in the direction of the other end of the orbiting scroll 600 together with the back pressure ring 650, and more particularly, the auxiliary ring 660 is disposed on the outer circumferential surface of the orbiting scroll runner 610 in the direction of the other end and in surface contact with one surface of the wear plate 500.

That is, the auxiliary ring 660 prevents one surface of the center plate 200 and the other surface of the orbiting scroll runner plate 610 from being in direct surface contact with each other, so that when the orbiting scroll runner plate 610 rotates, the other surface of the orbiting scroll runner plate 610 is not damaged due to friction with one surface of the wear plate 500, and durability of the orbiting scroll 600 can be improved.

The fixed scroll 700 is disposed in one end direction of the orbiting scroll 600, and the orbiting scroll 600 orbits inside the fixed scroll 700.

Such a fixed scroll 700 includes a fixed scroll mirror plate 710, a fixed scroll wrap 720, and an ejection port 740.

The fixed scroll mirror plate 710 is formed in a vertically arranged disk shape, and the fixed scroll mirror plate 710 is accommodated in the housing 100 and arranged in a direction of one end of the orbiting scroll 600.

the fixed scroll wrap 720 is formed in a spiral shape protruding from the other surface of the fixed scroll mirror plate 710 in the horizontal direction, and is inserted with being shifted by 180 degrees with respect to the orbiting scroll wrap 620.

On the other hand, the fixed scroll wrap 720 and the orbiting scroll wrap 620 are engaged with each other, so that a plurality of compression chambers 730 are formed between the fixed scroll wrap 720 and the orbiting scroll wrap 620.

The compression chamber 730 is a space for compressing refrigerant and working oil by the rotation of the orbiting scroll 600, and when the orbiting scroll 620 and the fixed scroll 720 are engaged with each other, the compression chamber 730 is surrounded by the orbiting scroll runner 610, the orbiting scroll 620, the fixed scroll plate 710, and the fixed scroll 720 to form a plurality of compression chambers 730.

When the orbiting scroll 600 orbits while the rotary shaft 300 rotates by the operation of the driving motor 400 in the compression chamber 730, the pressure of the low-pressure refrigerant that moves into the compression chamber 730 through the back pressure hole 630 communicating the compression chamber 730 and the back pressure chamber 640 increases.

at this time, when the pressure of the compression chamber 730 becomes high, the gas flows into the gas-liquid separation chamber 820 of the head 800, which will be described later.

Discharge port 740 penetrates the center of fixed scroll plate 710 in a direction from one surface to the other surface, and discharge port 740 is a hole through which high-pressure refrigerant is discharged from compression chamber 730 to head 800.

A valve 750 is formed on one side of the fixed scroll plate 710 to selectively open or close the ejection port 740.

The valve 750 closes the discharge port 740 before the low-pressure refrigerant formed in the compression chamber 730 reaches a high pressure, thereby preventing the low-pressure refrigerant from being discharged to the head 800 through the discharge port 740.

When the low-pressure refrigerant rises to a high pressure by the operation of the drive motor 400, as shown in fig. 5, the high-pressure valve 750 of the refrigerant is opened, and the high-pressure refrigerant formed in the compression chamber 730 is discharged to the head 800 through the discharge port 740.

Therefore, the discharge of the low-pressure refrigerant formed in the compression chamber 730 from the compression chamber 730 to the head 800 through the discharge port 740 is effectively prevented by the valve 750 before the refrigerant reaches a high pressure.

Alternatively, the upper side of the valve 750 may form a stopper 751.

In order to discharge the high-pressure refrigerant formed in the compression chamber 730 to the head 800 through the discharge port 740, when the valve 750 is opened, the stopper 751 is in contact with the upper surface of the valve 750, and the degree of opening of the valve 750 is restricted.

That is, the stopper 751 can effectively prevent the valve from being excessively opened.

The head 800 is disposed in one end direction of the fixed scroll 700, a refrigerant outlet 810 through which a high-pressure refrigerant flows out is formed in an outer side surface of the head, and the head 800 is screw-coupled to the housing 100, thereby forming an appearance of the electric compressor device according to the present invention.

Such a head 800 includes a gas-liquid separation chamber 820.

The gas-liquid separation chamber 820 is formed inside the head 800 and communicates with the compression chamber 730 through the discharge port 740.

Further, the high-pressure refrigerant compressed in the compression chamber 730 by the rotation of the orbiting scroll 600 flows into the gas-liquid separation chamber 820 through the discharge port 740.

Such a gas-liquid separation chamber 820 separates the refrigerant pressurized in the compression chamber 730 into a gas phase and a liquid phase, and discharges the compressed gas-phase refrigerant through the refrigerant outflow port 810 opened at one side.

then, the separated liquid-phase refrigerant flows into the back-pressure chamber 640 through the wall surface 760 of the fixed scroll 700.

The wall 760 horizontally protrudes from the outer circumferential surface of the fixed scroll mirror plate 710 of the plurality of fixed scrolls 720 toward the other surface.

The other side of the wall 760 contacts one side of the wear plate 500.

Thus, the wall surface 760 may effectively prevent the high-pressure refrigerant flowing between the orbiting scroll 600 and the fixed scroll 700 from leaking to the outside of the fixed scroll 700.

On the other hand, the orbiting scroll 600 is accommodated between the wall surfaces 760.

At this time, it is preferable that the diameter of the orbiting scroll 600 is formed to be smaller than the inner diameter of the wall surface 760.

Accordingly, when the orbiting scroll mirror plate 610 rotates, the outer circumferential surface of the orbiting scroll mirror plate 610 is not damaged by friction with the inner circumferential surface of the wall surface 760, and the durability of the orbiting scroll 600 can be improved.

the wall surface 760 has a second refrigerant recovery hole 761 formed therein.

The second refrigerant recovery holes 761 serve to communicate the gas-liquid separation chamber 820 of the header 800 and the first refrigerant recovery holes 220 with each other, as shown in fig. 5, and function as: the high-pressure refrigerant collected in the gas-liquid separation chamber 820 is sent to the back-pressure chamber 640 through the first refrigerant recovery hole 220 by the pressure difference.

On the other hand, when a high pressure or an intermediate pressure flows into the back pressure chamber 640, the orbiting scroll 600 floats up excessively in one end direction, and thus the operation efficiency of the compressor may be reduced.

Therefore, the pressure reducing member 762 is disposed inside the second refrigerant recovery hole 761.

the decompression member 762 is for reducing the pressure of the fluid, and the decompression member 762 is disposed inside the second refrigerant recovery hole 761 and reduces the high-pressure refrigerant moving from the gas-liquid separation chamber 820 to the back pressure chamber 640.

That is, the decompression member 762 can reduce the high pressure of the refrigerant flowing in through the second refrigerant recovery hole 761 of the wall surface 760 to an intermediate pressure, and send the refrigerant to the back pressure chamber 640.

Thus, the back pressure chamber 640 can maintain the pressure of the refrigerant at an intermediate pressure, and the operating efficiency of the compressor can be improved.

As described above, according to the electric compressor device of an embodiment of the present invention, the back pressure ring 650 prevents the refrigerant of the intermediate pressure flowing into the back pressure chamber 640 from leaking, thereby preventing the refrigerant of the intermediate pressure flowing into the back pressure chamber 640 from leaking, and effectively floating the orbiting scroll 600.

further, if an excessive amount of refrigerant flows into the back pressure chamber 640 and the pressure of the refrigerant rises from the intermediate pressure to a high pressure, the cutout portions 651 open in the radial direction, and a portion of the pressure of the refrigerant leaks between the cutout portions 651 where the intermediate pressure of the refrigerant opens in the radial direction, so that a portion of the high pressure of the refrigerant leaks in the back pressure chamber 640, and the pressure of the back pressure chamber 640 can be maintained at the intermediate pressure.

In addition, the auxiliary ring 660 can prevent one surface of the wear plate 500 and the other surface of the orbiting scroll runner plate 610 from directly contacting each other, so that when the orbiting scroll runner plate 610 rotates, the other surface of the orbiting scroll runner plate 610 is not damaged due to friction with one surface of the wear plate 500, and the durability of the orbiting scroll 600 can be improved.

The decompression member 762 is disposed inside the second refrigerant recovery hole 761 to reduce the high pressure of the refrigerant moving from the discharge portion 740 to the back pressure chamber 640 through the second refrigerant recovery hole 761, so that the back pressure chamber 640 can maintain the pressure of the refrigerant at an intermediate pressure, thereby improving the operating efficiency of the compressor.

In addition, a valve 750 is formed at one side of the fixed scroll plate 710 to selectively open or close the discharge port 740, so that it is possible to effectively prevent the refrigerant of low pressure formed in the compression chamber 730 from being discharged from the compression chamber 730 to the head 800 through the discharge port 740 before reaching high pressure.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea of the present invention.

Claims

1. an electric compressor device, comprising:

A casing through which a refrigerant inlet port penetrates;

A center plate fixed inside the case;

A rotating shaft rotatably supported by the housing and the center plate;

A driving motor fixed inside the housing and rotating the rotation shaft;

The wear-resisting plate is arranged in the direction of one end of the central plate;

An orbiting scroll disposed in a direction of one end of the wear plate and orbiting by the rotating shaft;

a fixed scroll disposed in one end direction of the orbiting scroll, the orbiting scroll orbiting inside the fixed scroll; and

A head portion disposed in a direction of one end of the fixed wrap, a refrigerant outflow port being formed on an outer side surface of the head portion,

And a back pressure ring is installed at the other end direction of the orbiting scroll, and a notch part is formed on the back pressure ring so as to be opened in the radial direction by the pressure of the refrigerant.

2. The electric compressor assembly according to claim 1,

The back pressure ring is made of polytetrafluoroethylene materials.

3. The electric compressor assembly according to claim 1,

4. The electric compressor assembly according to claim 1,

5. The electrodynamic compressor device of claim 4,

the auxiliary ring is made of spring steel.

6. the electric compressor assembly according to claim 1,

The orbiting scroll includes:

A disk-shaped orbiting scroll plate disposed vertically;

A spiral orbiting scroll protruding from one surface of the orbiting scroll mirror plate toward a horizontal direction;

A back pressure hole penetrating the orbiting scroll plate from one surface to the other surface; and

And a back pressure chamber surrounded by the other surface of the wear plate and the center plate.

7. The electric compressor assembly according to claim 6,

The fixed scroll includes:

a disk-shaped fixed scroll plate vertically arranged;

A discharge port penetrating the center of the fixed scroll plate from one surface to the other surface;

A valve disposed on one end face of the fixed scroll mirror plate for selectively opening or closing the ejection port;

A wall surface protruding from the outer peripheral surface of the fixed scroll plate in the other surface direction in the horizontal direction; and

A spiral fixed scroll protruding from the other surface of the fixed scroll plate in a horizontal direction so as to be inserted with being shifted by 180 degrees with respect to the orbiting scroll.

8. The electric compressor assembly according to claim 7,

9. The electrodynamic compressor device of claim 8,

10. The electrodynamic compressor device of claim 8,

11. The electric compressor assembly according to claim 10,

a first refrigerant recovery hole formed in the center plate to communicate one surface of the center plate with an inner circumferential surface surrounding the back pressure chamber,

The wall surface is formed with a second refrigerant recovery hole formed between the gas-liquid separation chamber and the first refrigerant recovery hole so that the gas-liquid separation chamber and the first refrigerant recovery hole communicate with each other.

12. The electric compressor assembly according to claim 11,

A pressure reducing member is attached to the second refrigerant recovery hole.