WO2015085823A1 - Scroll compressor - Google Patents

Scroll compressor Download PDF

Info

Publication number
WO2015085823A1
WO2015085823A1 PCT/CN2014/088630 CN2014088630W WO2015085823A1 WO 2015085823 A1 WO2015085823 A1 WO 2015085823A1 CN 2014088630 W CN2014088630 W CN 2014088630W WO 2015085823 A1 WO2015085823 A1 WO 2015085823A1
Authority
WO
WIPO (PCT)
Prior art keywords
scroll
pressure
compressor
fixed
plate
Prior art date
Application number
PCT/CN2014/088630
Other languages
French (fr)
Chinese (zh)
Inventor
李庆才
叶涛
Original Assignee
艾默生环境优化技术(苏州)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to CN201310680416.8A priority Critical patent/CN104712556B/en
Priority to CN201310680416.8 priority
Priority to CN201320822178.5U priority patent/CN203614399U/en
Priority to CN201320822178.5 priority
Application filed by 艾默生环境优化技术(苏州)有限公司 filed Critical 艾默生环境优化技术(苏州)有限公司
Publication of WO2015085823A1 publication Critical patent/WO2015085823A1/en

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02Rotary-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
    • F04C18/0207Rotary-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
    • F04C18/0215Rotary-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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02Rotary-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
    • F04C18/0207Rotary-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
    • F04C18/0246Details concerning the involute wraps or their base, e.g. geometry
    • F04C18/0269Details concerning the involute wraps
    • F04C18/0292Ports or channels located in the wrap
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008Hermetic pumps

Abstract

A scroll compressor (100) comprises: a casing (10); a compressing mechanism (CM) arranged in the casing (10), the compressing mechanism (CM) comprising a fixed scroll (20) and a movable scroll (30); a main bearing seat (50) suitable for supporting the fixed scroll (20); a back pressure chamber (B) that is formed in the opposite second side of an end plate (34) of the movable scroll, and is suitable for applying back pressure to the second side of the end plate of the movable scroll to enable the movable scroll (30) to engage with the fixed scroll (20); and a pressure introducing passage (P) thatis arranged in the compressing mechanism (CM) and can selectively provide fluid communication between the back pressure chamber (B) and the predetermined area in the casing (10), wherein the pressure in the predetermined area is greater than the suction pressure of the scroll compressor.

Description

Scroll compressor

This application claims the invention application No. 201310680416.8, entitled "Vortex Compressor", filed on December 12, 2013, and the utility of the invention entitled "Vortex Compressor" filed on December 12, 2013 The priority of the novel application No. 201320822178.5, the entire disclosure of each of which is incorporated herein.

Technical field

The present invention relates to a scroll compressor.

Background technique

The content of this section merely provides background information related to the present disclosure, which may not constitute prior art.

A scroll compressor design is known in which a back pressure chamber is provided on the orbiting scroll side to provide a back pressure for the orbiting scroll to engage the fixed scroll in the axial direction. However, in this design, under adverse conditions such as liquid hammer, there is a possibility that the back pressure is lowered to make the movable scroll and the fixed scroll unable to engage in the axial direction, thereby causing the compressor to malfunction and Reduce the operational reliability of the compressor.

Therefore, there is a need for a scroll compressor with further improved reliability.

Summary of the invention

It is an object of one or more embodiments of the present invention to provide a scroll compressor with further improved reliability.

Another object of one or more embodiments of the present invention is to provide a scroll compressor that can still cause the orbiting scroll and the fixed scroll to engage each other in the axial direction after the movable scroll is tipped.

Yet another object of one or more embodiments of the present invention is to provide a scroll compressor that is more energy efficient and/or less costly and/or more wear resistant.

In order to achieve one or more of the above objects, according to one aspect of the present invention, a scroll compressor is provided, which may include: a housing; a compression mechanism disposed in the housing, The compression mechanism includes a fixed scroll and a movable scroll, wherein the fixed scroll includes a fixed scroll end plate and a fixed scroll blade formed on a first side of the fixed scroll end plate, the movable scroll including a scroll end plate and an orbiting scroll blade formed on a first side of the orbiting scroll end plate, and wherein the fixed scroll blade and the orbiting scroll blade are engaged with each other to form a series of fluids therebetween a compression bearing chamber; a main bearing housing adapted to support the fixed scroll; a back pressure chamber formed on an opposite second side of the movable scroll end plate and adapted Applying a back pressure to the second side of the orbiting scroll end plate to engage the orbiting scroll; and a pressure introduction passage, the pressure introduction passage being disposed in the compression mechanism and capable of The back pressure chamber is in selective fluid communication with a predetermined region in the housing, wherein the predetermined region has a pressure greater than an intake pressure of the scroll compressor.

DRAWINGS

The features and advantages of one or more embodiments of the present invention will become more <RTIgt;

Figure 1 is a longitudinal sectional view of a scroll compressor;

Figure 2 is an adaptive cross-sectional view of the compression mechanism and the main bearing housing of Figure 1;

Figure 3 is a schematic view of the movable scroll shown in Figure 2;

Figure 4 is a bottom plan view of a fixed scroll according to a first embodiment of the present invention;

Figure 5 is a partial cross-sectional view of the fixed scroll shown in Figure 4;

Figure 6 is a plan view of an orbiting scroll according to a second embodiment of the present invention;

Figure 7 is a cross-sectional view of the movable scroll shown in Figure 6;

Figure 8 is a plan view of an orbiting scroll according to a third embodiment of the present invention;

Figure 9 is a cross-sectional view of the movable scroll shown in Figure 8;

Figure 10 is a perspective view of a fixed scroll according to a fourth embodiment of the present invention;

Figure 11 is a plan view of an orbiting scroll according to a fifth embodiment of the present invention.

detailed description

The following description of the preferred embodiments is merely exemplary and is in no way intended to Application or usage restrictions. The same reference numerals are used in the respective drawings to refer to the same components, and thus the construction of the same components will not be repeatedly described.

The basic configuration and operation principle of the scroll compressor will be described below with reference to Figs.

As shown in FIGS. 1 and 2, a scroll compressor (hereinafter also referred to as a compressor) 100 includes a substantially closed casing 10. The housing 10 defines an interior space of the compressor 100. In the example of the figures, the housing 10 can be constructed from a generally cylindrical body portion 12, a top cover 14, and a bottom cover 16. These components of the housing 10 can be joined to each other, for example, by welding, bolting, or the like, by any suitable method.

A fluid inlet fitting 17 for drawing in the working fluid and a fluid outlet fitting 18 for discharging the compressed working fluid may be disposed on the housing 10. A compression mechanism CM capable of compressing the fluid may be disposed within the housing 10. In the present example, the drive mechanism 40 for driving the compression mechanism CM is also disposed in the housing 10. However, it will be understood by those skilled in the art that for a so-called open compressor design, the drive mechanism 40 can also be disposed outside of the housing 10.

More specifically, in the example as shown, the compression mechanism CM may include a fixed scroll 20 and an orbiting scroll 30. The fixed scroll 20 can be fixed relative to the housing 10 in any suitable manner, such as by bolts relative to the main bearing housing 50 described later.

As shown in FIG. 2, the fixed scroll 20 may include a fixed scroll end plate 24, a fixed scroll blade 26 formed on one side of the fixed scroll end plate 24, and a peripheral wall portion 22 located radially outward of the fixed scroll 20. The peripheral wall portion 22 may constitute a portion of the fixed scroll blade 26. A substantially central portion of the fixed scroll end plate 24 is formed with an exhaust port 28.

The movable scroll 30 may include a movable scroll end plate 34, a movable scroll blade 36 formed on one side of the movable scroll end plate 34, and a hub portion 32 formed on the other side of the movable scroll end plate 34. The main bearing housing 50 adapted to support the fixed scroll 20 and/or the movable scroll 30 can be fixed relative to the housing 10 by any suitable means. The movable scroll 30 can be driven by the drive mechanism 40 to rotate relative to the fixed scroll 20 (i.e., the central axis of the movable scroll 30 rotates about the central axis of the fixed scroll 20, but the movable scroll 30 itself does not wrap around itself. The central axis is rotated) to achieve compression of the fluid. The translational rotation described above is achieved by a cross slip ring 58 disposed between the fixed scroll 20 and the movable scroll 30.

The fixed scroll blade 26 may be engaged with the orbiting scroll blade 36 to form a series of compression chambers C1 whose volume gradually decreases from the radially outer side to the radially inner side together with the fixed scroll end plate 24 and the orbiting scroll end plate 34. C2 and C3 etc. compress the fluid. The exhaust port 28 can be in a series of compression chambers The innermost compression chamber C3 is in fluid communication.

In the example shown in FIG. 1, the scroll compressor 100 is of a high pressure side design. In this design, the compression mechanism 40 is in the exhaust pressure zone and the working fluid to be compressed is supplied directly into the suction pressure zone within the compression mechanism CM. Specifically, the fluid inlet fitting 17 is sealingly coupled to the fixed scroll 20 to supply the radially outermost compression chamber C1 of the series of compression chambers C1, C2, and C3 between the fixed scroll 20 and the movable scroll 30. The working fluid to be compressed.

The drive mechanism 40 may include, for example, a motor composed of a stator 42 and a rotor 43. The stator 42 can be fixed relative to the housing 10 in any suitable manner. The rotor 43 is rotatable in the stator 42 and is provided with a drive shaft 45 therein. The drive shaft 45 is supported by the main bearing housing 50 and the lower bearing housing 60. One end of the drive shaft 45 is formed with an eccentric crank pin 46. The eccentric crank pin 46 is fitted into the hub portion 32 of the movable scroll 30 via the unloading bushing 48 to drive the movable scroll 30. A lubricating oil passage 47 is also formed in the drive shaft 45. One end of the lubricating oil passage 47 (i.e., the lower end of the drive shaft 45) is located in a lubricating oil groove formed on the lower side of the housing 10. A pumping device 49 may be provided at the end of the lubricating oil passage 47.

In the normal operation of the compressor 100, the fixed scroll 20 and the movable scroll 30 must be engaged with each other in the axial direction to compress the working fluid. In addition, in order to provide the scroll assembly with a certain axial flexibility to increase the reliability and safety of the compressor, a back pressure chamber is usually provided for one of the fixed scroll 20 and the movable scroll 30, thereby making the fixed scroll 20 The movable scroll 30 can be reliably engaged with each other under the action of the back pressure.

In the compressor design shown in FIGS. 1 and 2, the back pressure chamber B is disposed on the side of the movable scroll 30 and located in the space inside the main bearing housing 50. In other words, the back pressure chamber B is formed on the opposite second side of the orbiting scroll end plate 34 and is adapted to apply a back pressure to the second side of the orbiting scroll end plate 34 to engage the orbiting scroll 30 with the fixed scroll 20. In particular, the back pressure chamber B is composed of the main bearing housing 50 and the fixed scroll 20 and the movable scroll 30. More specifically, at least a portion of the peripheral wall portion 22 of the fixed scroll 20 sealingly engages the first portion 52 of the main bearing housing 50 to form the first seal portion S1, and at least a portion of the hub portion 32 of the movable scroll 30 and the main bearing The second portion 54 of the seat 50 is sealingly engaged to form a second seal S2. An elastic seal capable of deforming in the axial direction may be provided in the region of the second seal portion S2 to accommodate axial displacement or tipping of the movable scroll 30 described below. Thereby, a substantially closed back pressure chamber B is formed between the main bearing housing 50, the fixed scroll 20 and the movable scroll 30. Further, the back pressure chamber B communicates with the compression chamber C2 at an intermediate pressure in, for example, a series of compression chambers via a communication hole 35 formed in the movable scroll end plate 34, thereby accumulating back pressure in the back pressure chamber B.

During normal operation of the compressor, the resultant pressure generated by the back pressure in the back pressure chamber B is greater than the resultant force formed by the pressure of the working fluid in the compression chambers C1, C2, and C3, thereby causing the movable scroll 30 and the fixed scroll 20 Engaging each other in the axial direction. And when, for example, when the compressor is under a liquid hammer or the like, the combined force of the working fluids in the compression chambers C1, C2, and C3 will be greater than the resultant force generated by the back pressure in the back pressure chamber B, thereby moving the scroll 30 and the fixed scrolls 20 are separated from each other by a predetermined distance d or tipping in the axial direction, for example as shown in Fig. 3, thereby releasing pressure for the respective compression chambers, thereby protecting the compression mechanism from being damaged.

However, in the case shown in FIG. 3, the back pressure in the back pressure chamber B (which is greater than the suction pressure) leaks through the gap G between the fixed scroll 20 and the movable scroll 30 to the compression chamber at the suction pressure. In C1, the back pressure is thus reduced. If the back pressure leaks more, the fixed scroll 20 and the movable scroll 30 may not be engaged with each other, so that the compression mechanism does not work normally. In addition, due to pressure changes or fluctuations in the compression chamber C2, even during normal operation of the compressor, there is a possibility that the movable scroll 30 is tipped due to a decrease in pressure in the back pressure chamber.

In order to avoid that the fixed scroll 20 and the movable scroll 30 cannot be engaged in the above case (in other words, the movable scroll is tipped), the technician attempts to increase the resultant force of the back pressure in the back pressure chamber by, for example, the following: 1) changing the communication hole The position of 34 is such that it communicates with a higher pressure compression chamber to provide a higher back pressure for the back pressure chamber; 2) the aperture of the communication hole 34 is increased to reduce the throttling effect of the connection hole, thereby causing compression chamber C2 The pressure can flow into the back pressure chamber more quickly and at a higher flow rate; 3) increase the force area of the movable scroll end plate to provide the resultant force of the back pressure. Although the above method can effectively improve the axial force of the movable scroll for engaging the fixed scroll and improve the anti-overturning ability of the movable scroll, the increase of the axial force will inevitably lead to the movable scroll and the fixed The contact pressure of the contact surface between the vortices is increased, so that the power consumption of the compressor is increased and the energy efficiency ratio (EER) is lowered. In addition, these contact surfaces are subject to excessive wear, which reduces the life and reliability of the scroll components.

To this end, the inventors propose to provide a pressure introduction passage in the compression mechanism CM and to enable the pressure introduction passage to have a pressure in the back pressure chamber B and the housing 10 that is greater than the suction pressure of the scroll compressor (preferably greater than the back pressure). Selective fluid communication is provided between the predetermined regions. In particular, the pressure introduction passage may be configured to form a fluid communication between the back pressure chamber B and a predetermined region when the movable scroll 30 is tipped, and to cut the back pressure chamber when the movable scroll 30 is engaged with the fixed scroll 20. Fluid communication with the predetermined area. Therefore, when the movable scroll 30 is tipped, the working fluid having a pressure greater than the suction pressure can be additionally and/or quickly replenished into the back pressure chamber via the pressure introduction passage, thereby effectively compensating for the back pressure chamber. Pressure leak or pressure loss, which enables The vortex vortex 30 is re-engaged quickly and/or reliably with the fixed vortex 20. On the other hand, when the movable scroll 30 is engaged with the fixed scroll 20, the fluid communication between the back pressure chamber and the predetermined region is cut off, so the pressure in the back pressure chamber is only related to, for example, the pressure in the compression chamber C2. The pressure in the predetermined area is irrelevant, in other words, the pressure in the back pressure chamber is not additionally increased when the compressor is normally operated. Thereby, excessive wear between the movable scroll and the fixed scroll is avoided, and the energy efficiency ratio and reliability of the compressor are improved. Further, since the above effect can be achieved by performing a small amount of machining such as drilling for a fixed scroll or a movable scroll, the manufacturing cost of the scroll member is not significantly improved.

In the first embodiment of the invention shown in FIGS. 4 and 5, the pressure introduction passage P is formed in the fixed scroll 20. Specifically, the pressure introduction passage P may be configured to form at least one hole 25 in the peripheral wall portion 22 of the fixed scroll 20. One end 251 of the hole 25 is opened to a predetermined area in the casing 10, and the other end 252 of the hole 25 leads to an end face of the peripheral wall portion 22 of the fixed scroll 20 that engages with the movable scroll 20, whereby the other end 252 of the hole 25 is The movable scroll 20 can be closed by the orbiting scroll end plate 34 when it is engaged with the fixed scroll 30. Here, the predetermined area may be an exhaust pressure zone within the housing. The shape of the hole 25 is not limited to the linear form shown in the drawings, but may be a fold line or any other form as long as one end of the hole communicates with the exhaust pressure zone in the housing, and the other end of the hole can be closed by the passive scroll end plate. Just fine. For example, the hole 25 may be formed in a substantially L shape such that one end of the hole 25 is opened on the outer side surface of the peripheral wall portion of the fixed scroll to introduce exhaust pressure to the back pressure chamber or at the wall surface of the exhaust port 28 of the fixed scroll end plate The opening is to introduce a possibly higher pressure while the other end is open at the bottom surface of the peripheral wall portion of the fixed scroll. For another example, the hole 25 may be formed in a substantially U shape such that one end of the hole 25 is open on a side of the fixed scroll end plate on which the fixed scroll blade is formed, and the other end is also open on the bottom surface of the peripheral wall portion of the fixed scroll. Thereby, the fluid in one of the compression chambers can be introduced into the back pressure chamber.

Thus, as described above, when the movable scroll 30 is tipped, the exhaust pressure is introduced into the back pressure chamber via the pressure introduction passage P (hole 25), so that the movable scroll 30 can be quickly and/or reliably The fixed vortex 20 is re-engaged. On the other hand, when the movable scroll 30 is engaged with the fixed scroll 20, the pressure introduction passage P (hole 25) is closed by the passive scroll end plate 34, so that the exhaust pressure is not additionally introduced into the back pressure chamber, so that Increase the pressure in the back pressure chamber.

The number of the holes 25 is not limited to that shown in the drawings. On the contrary, for example, only one hole 25 may be provided in the peripheral wall portion 22 of the fixed scroll 20, or a plurality of holes 25 may be uniformly disposed in the circumferential direction of the fixed scroll ( For example, in the fourth embodiment as shown in Fig. 10, three holes 25) are provided to be able to supply a sufficient amount of working fluid in any case of overturning.

In a preferred form, at least one groove in fluid communication with the other end 252 of the at least one hole 25 may be formed on an end surface of the peripheral wall portion 22 of the fixed scroll 20 opposite to the movable scroll end plate 34. 27. The at least one groove 27 may extend in the circumferential direction in the peripheral wall portion of the fixed scroll. Further, for example, in the fourth embodiment as shown in FIG. 10, a number of concaves corresponding to the number of the holes 25 may be provided on the end faces of the peripheral wall portion 22 of the fixed scroll 20 opposite to the movable scroll end plate 34. The groove 27 is, for example, three grooves 27. In addition, the above groove may also be provided on the movable scroll 30. For example, in the fifth embodiment of the present invention shown in FIG. 11, at least one hole 25 such as shown in FIG. 5 may be formed on the end surface of the movable scroll end plate 34 opposite to the peripheral wall portion 22 of the fixed scroll 20. The other end 252 is in fluid communication with at least one groove 37. In the example of FIG. 11, the grooves 37 are formed in three corresponding to the number of the holes 25. In particular, the recess 37 can be formed in the path of movement of the aperture 25 during the translational rotation of the orbiting scroll 30 to maintain fluid communication with the aperture 25.

Further, in order to ensure that the movable vortex can provide a sufficient flow of the working fluid to the back pressure chamber when the tilting occurs, the number of the holes 27, the aperture, the pressure of the predetermined area, and the length and/or area of the groove 27 can be rationally designed. To meet the predetermined requirements. For example, the total circumference of the at least one groove 27 described above may be set to be substantially equal to the outer diameter of the movable scroll 20.

Figures 6 and 7 show a second embodiment in accordance with the present invention, in which the pressure introduction passage P includes at least one hole 33 formed in the orbiting scroll blade 36, one end 331 of the hole 33 being open to the back pressure Cavity B, while the other end 332 of the bore 33 can be closed by the fixed scroll end plate 24 when the orbiting scroll 30 is engaged with the fixed scroll 20. For example, the other end 332 of the hole 33 may be located on the end face of the orbiting scroll blade 36. Similar to the description in the first embodiment, the shape and position of the hole 33 are not limited to those shown in the drawings, but may be rationally designed according to the magnitude of the pressure to be introduced. In this case, the predetermined area in the compressor housing may be any one of a series of compression chambers C1, C2, C3, such as a compression chamber C3 located radially inward. Likewise, at least one groove 37 in fluid communication with the other end 332 of the at least one aperture 33 can be formed on the end face of the orbiting scroll blade 36. At least one groove 37 may extend in the spiral direction of the orbiting scroll blade 36. Furthermore, the total circumference of the at least one groove 37 may be set to be substantially equal to the outer diameter of the movable scroll 30.

Further, in the third embodiment of the present invention as shown in FIGS. 8 and 9, the pressure introduction passage P may include a plurality of, for example, three holes 33 formed in the orbiting scroll blade 36 and respectively communicate with the holes 33 or A groove 37 that is simultaneously connected.

The configurations of the second embodiment and the third embodiment can achieve similar technical effects as those of the first embodiment, and are not described herein again.

Although various embodiments and aspects of the invention have been described above, those skilled in the art will appreciate that further variations and/or modifications may be made to some aspects of the invention. Progress.

For example, in accordance with a preferred aspect of the present invention, a scroll compressor is provided, which may include: a housing; a compression mechanism disposed within the housing, the compression mechanism including a fixed scroll and an orbiting scroll, wherein The fixed scroll includes a fixed scroll end plate and a fixed scroll blade formed on a first side of the fixed scroll end plate, the movable scroll including an orbiting scroll end plate and a movable scroll end formed at the movable scroll end An orbiting scroll blade on a first side of the plate, and wherein the fixed scroll blade and the orbiting scroll blade are engaged with each other to form a series of compression chambers capable of compressing a fluid therebetween; a main bearing housing, the main bearing a seat adapted to support the fixed scroll; a back pressure chamber formed on an opposite second side of the orbiting scroll end plate and adapted to be applied to a second side of the orbiting scroll end plate Back pressure to engage the orbiting scroll with the fixed scroll; and pressure introduction passage, the pressure introduction passage being disposed in the compression mechanism and capable of being predetermined in the back pressure chamber and the housing Selective fluid communication between the regions, wherein the predetermined region Pressure is greater than the suction pressure of the scroll compressor.

For example, according to another preferred aspect of the present invention, the pressure introduction passage may be configured to form a fluid communication between the back pressure chamber and the predetermined region when the movable scroll is tipped over, The movable scroll severs fluid communication between the back pressure chamber and the predetermined region when engaged with the fixed scroll.

For example, according to another preferred aspect of the invention, the pressure introduction passage may be formed in the fixed vortex.

For example, according to another preferred aspect of the present invention, the pressure introduction passage may include at least one hole formed in a peripheral wall portion of the fixed scroll, one end of the hole being open to the predetermined region, the hole The other end can be closed by the orbiting scroll end plate when the orbiting scroll is engaged with the fixed scroll.

For example, in accordance with another preferred aspect of the invention, the predetermined area may be an exhaust pressure zone within the housing.

For example, according to another preferred aspect of the present invention, at least one of fluid communication with the other end of the at least one hole may be formed on an end surface of the peripheral wall portion of the fixed scroll opposite to the movable scroll end plate Groove. Preferably, the at least one groove may extend in a circumferential direction in a peripheral wall portion of the fixed scroll. Further preferably, the total circumference of the at least one groove may be substantially equal to the outer diameter of the orbiting scroll.

For example, according to another preferred aspect of the present invention, at least one of fluid communication with the other end of the at least one hole may be formed on an end surface of the movable scroll end plate opposite to a peripheral wall portion of the fixed scroll Groove.

For example, according to another preferred aspect of the present invention, the pressure introduction passage may include at least one hole formed in the orbiting scroll blade, one end of the hole being open to the back pressure chamber, and the other of the hole One end can be closed by the fixed scroll end plate when the movable scroll is engaged with the fixed scroll.

For example, in accordance with another preferred aspect of the present invention, the predetermined area may be a radially inner compression chamber of the series of compression chambers.

For example, in accordance with another preferred aspect of the present invention, at least one groove in fluid communication with the other end of the at least one aperture may be formed on an end surface of the orbiting scroll blade. Preferably, the at least one groove may extend in a spiral direction of the orbiting scroll blade. Further preferably, the total circumference of the at least one groove may be substantially equal to the outer diameter of the orbiting scroll.

For example, according to another preferred aspect of the present invention, the back pressure chamber may be formed in a space in the main bearing housing and via the communication hole formed in the movable scroll end plate and the series of compression chambers One of the compression chambers is in fluid communication.

For example, according to another preferred aspect of the present invention, at least a portion of the peripheral wall portion of the fixed scroll may be sealingly engaged with the first portion of the main bearing housing to form a first seal portion, and the movable scroll hub At least a portion of the portion may sealingly engage the second portion of the main bearing housing to form a second seal.

For example, in accordance with another preferred aspect of the present invention, the scroll compressor may further include a fluid inlet fitting that is sealingly coupled to the fixed scroll.

For example, according to another preferred aspect of the invention, the scroll compressor may be a high pressure side compressor.

Although the various embodiments of the present invention have been described in detail herein, it is understood that the invention The skilled person implements other variations and variants. All such variations and modifications are intended to fall within the scope of the invention. Moreover, all of the components described herein can be replaced by other technically equivalent components.

Claims (18)

  1. A scroll compressor (100) comprising:
    Housing (10);
    a compression mechanism (CM) disposed within the housing (10), the compression mechanism (CM) including a fixed scroll (20) and an orbiting scroll (30), wherein the fixed scroll (20) includes a scroll end plate (24) and a fixed scroll blade (26) formed on a first side of the fixed scroll end plate (24), the movable scroll (30) including an orbiting scroll end plate (34) and An orbiting scroll blade (36) formed on a first side of the orbiting scroll end plate (34), and wherein the fixed scroll blade (26) and the orbiting scroll blade (36) are engaged with each other therebetween Forming a series of compression chambers capable of compressing the fluid;
    a main bearing housing (50), the main bearing housing (50) is adapted to support the fixed scroll (20);
    a back pressure chamber (B) formed on an opposite second side of the orbiting scroll end plate (34) and adapted to apply a back to the second side of the orbiting scroll end plate Pressing to engage the orbiting scroll (30) with the fixed scroll (20);
    a pressure introduction passage (P) disposed in the compression mechanism (CM) and capable of being between the back pressure chamber (B) and a predetermined area in the housing (10) Selective fluid communication is provided, wherein the predetermined region has a pressure greater than an inspiratory pressure of the scroll compressor.
  2. The scroll compressor according to claim 1, wherein said pressure introduction passage (P) is configured to: said back pressure chamber (B) and said predetermined region when said movable scroll (30) is tipped Fluid communication is formed therebetween, and fluid communication between the back pressure chamber (B) and the predetermined region is severed when the orbiting scroll (30) is engaged with the fixed scroll (20).
  3. A scroll compressor according to claim 2, wherein said pressure introduction passage (P) is formed in said fixed scroll (20).
  4. The scroll compressor according to claim 3, wherein said pressure introduction passage (P) includes at least one hole (25) formed in a peripheral wall portion (22) of said fixed scroll (20), said hole One end (251) of (25) is open to the predetermined area, and the other end (252) of the hole (25) The movable scroll (30) can be closed by the orbiting scroll end plate (34) when it is engaged with the fixed scroll (20).
  5. The scroll compressor of claim 4, wherein said predetermined area is an exhaust pressure zone within said housing.
  6. The scroll compressor according to claim 4, wherein at least an end surface of said peripheral wall portion (22) of said fixed scroll (20) opposite said movable scroll end plate (34) is formed with said at least At least one groove (27) in fluid communication with the other end (252) of one of the holes (25).
  7. The scroll compressor according to claim 6, wherein said at least one groove (27) extends in a circumferential direction in a peripheral wall portion (22) of said fixed scroll (20).
  8. A scroll compressor according to claim 7, wherein a total circumference of said at least one groove (27) is substantially equal to an outer diameter of said orbiting scroll (30).
  9. The scroll compressor according to claim 4, wherein at least an end surface of said movable scroll end plate (34) opposite to a peripheral wall portion (22) of said fixed scroll (20) is formed with said at least At least one groove (37) in fluid communication with the other end (252) of one of the holes (25).
  10. A scroll compressor according to claim 3, wherein said pressure introduction passage (P) includes at least one hole (33) formed in said orbiting scroll blade (36), one end of said hole (33) (331) opening to the back pressure chamber (B), the other end (332) of the hole (33) being capable of being engaged by the movable scroll (30) when engaged with the fixed scroll (20) The fixed scroll end plate (24) is closed.
  11. A scroll compressor according to claim 10, wherein said predetermined area is a compression chamber located radially inward of said series of compression chambers.
  12. A scroll compressor according to claim 10, wherein said orbiting scroll blade (36) At least one groove (37) is formed in the end face in fluid communication with the other end (332) of the at least one hole (33).
  13. A scroll compressor according to claim 12, wherein said at least one groove (37) extends in a spiral direction of said orbiting scroll blade (36).
  14. A scroll compressor according to claim 12, wherein a total circumference of said at least one groove (37) is substantially equal to an outer diameter of said movable scroll (30).
  15. The scroll compressor according to any one of claims 1 to 14, wherein the back pressure chamber (B) is formed in a space in the main bearing housing (50) and via the movable scroll A communication hole (35) in the end plate (34) is in fluid communication with one of the series of compression chambers.
  16. A scroll compressor according to claim 15, wherein at least a portion of a peripheral wall portion (22) of said fixed scroll (20) is sealingly engaged with said first portion (52) of said main bearing housing (50) to form a first seal (S1), and at least a portion of the hub (32) of the orbiting scroll (30) sealingly engages a second portion (54) of the main bearing housing (50) to form a second seal Department (S2).
  17. A scroll compressor according to any one of claims 1 to 14, further comprising a fluid inlet fitting (17), the fluid inlet fitting (17) being sealingly connected to the fixed scroll (20).
  18. A scroll compressor according to any one of claims 1 to 14, wherein the scroll compressor is a high pressure side compressor.
PCT/CN2014/088630 2013-12-12 2014-10-15 Scroll compressor WO2015085823A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201310680416.8A CN104712556B (en) 2013-12-12 2013-12-12 Screw compressor
CN201310680416.8 2013-12-12
CN201320822178.5U CN203614399U (en) 2013-12-12 2013-12-12 Scroll compressor
CN201320822178.5 2013-12-12

Publications (1)

Publication Number Publication Date
WO2015085823A1 true WO2015085823A1 (en) 2015-06-18

Family

ID=53370598

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/088630 WO2015085823A1 (en) 2013-12-12 2014-10-15 Scroll compressor

Country Status (1)

Country Link
WO (1) WO2015085823A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3418572A1 (en) * 2017-06-22 2018-12-26 LG Electronics Inc. Compressor having lubrication structure for thrust surface
EP3647594A1 (en) * 2018-10-30 2020-05-06 LG Electronics Inc. Compressor
US10697455B2 (en) 2017-06-22 2020-06-30 Lg Electronics Inc. Compressor having lubrication structure for thrust surface
US10781817B2 (en) 2017-06-14 2020-09-22 Lg Electronics Inc. Compressor having centrifugation and differential pressure structure for oil supplying

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1189582A (en) * 1997-01-28 1998-08-05 运载器有限公司 Scroll compressor with controlled fluid venting to back pressure chamber
US20070231172A1 (en) * 2006-03-31 2007-10-04 Kazuyuki Fujimura Scroll fluid machine
US20110243777A1 (en) * 2008-12-03 2011-10-06 Kabushiki Kaisha Toyota Jidoshokki Scroll compressor
US20120201707A1 (en) * 2011-02-04 2012-08-09 Zlll Sun Scroll compressor with three discharge valves, and discharge pressure tap to back pressure chamber
WO2012128499A2 (en) * 2011-03-24 2012-09-27 Lg Electronics Inc. Scroll compressor
CN103104488A (en) * 2011-11-09 2013-05-15 Lg电子株式会社 Scroll compressor
CN203614399U (en) * 2013-12-12 2014-05-28 艾默生环境优化技术(苏州)有限公司 Scroll compressor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1189582A (en) * 1997-01-28 1998-08-05 运载器有限公司 Scroll compressor with controlled fluid venting to back pressure chamber
US20070231172A1 (en) * 2006-03-31 2007-10-04 Kazuyuki Fujimura Scroll fluid machine
US20110243777A1 (en) * 2008-12-03 2011-10-06 Kabushiki Kaisha Toyota Jidoshokki Scroll compressor
US20120201707A1 (en) * 2011-02-04 2012-08-09 Zlll Sun Scroll compressor with three discharge valves, and discharge pressure tap to back pressure chamber
WO2012128499A2 (en) * 2011-03-24 2012-09-27 Lg Electronics Inc. Scroll compressor
CN103104488A (en) * 2011-11-09 2013-05-15 Lg电子株式会社 Scroll compressor
CN203614399U (en) * 2013-12-12 2014-05-28 艾默生环境优化技术(苏州)有限公司 Scroll compressor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10781817B2 (en) 2017-06-14 2020-09-22 Lg Electronics Inc. Compressor having centrifugation and differential pressure structure for oil supplying
EP3418572A1 (en) * 2017-06-22 2018-12-26 LG Electronics Inc. Compressor having lubrication structure for thrust surface
US10697455B2 (en) 2017-06-22 2020-06-30 Lg Electronics Inc. Compressor having lubrication structure for thrust surface
EP3647594A1 (en) * 2018-10-30 2020-05-06 LG Electronics Inc. Compressor

Similar Documents

Publication Publication Date Title
US9458847B2 (en) Scroll compressor having biasing system
US9879674B2 (en) Compressor having capacity modulation assembly
US8517704B2 (en) Compressor having capacity modulation system
US9046100B2 (en) Variable vane pump with communication groove in the cam ring
KR101253135B1 (en) Compressor having piston assembly
CN102384085B (en) Compressor having capacity modulation system
CN102762866B (en) Compressor including valve assembly
US7976296B2 (en) Scroll compressor having capacity modulation system
DE69915793T2 (en) Spiral machine with exhaust valve
KR101014255B1 (en) Dual volume-ratio scroll machine
US7815423B2 (en) Compressor with fluid injection system
US7338265B2 (en) Scroll machine with single plate floating seal
US6179589B1 (en) Scroll machine with discus discharge valve
US6773242B1 (en) Scroll compressor with vapor injection
KR101013085B1 (en) Scroll machine
US4892469A (en) Compact scroll-type fluid compressor with swing-link driving means
KR100530662B1 (en) Scroll type fluid machine
US8793870B2 (en) Compressor having shell with alignment features
AU2004212516B2 (en) Scroll machine
KR100749040B1 (en) Scroll compressor
KR100755238B1 (en) Dual volume-ratio scroll machine
AU2002300780B9 (en) Compressor discharge valve
US7322807B2 (en) Scroll machine with axially compliant mounting
JP3874300B2 (en) Vane pump
KR101192649B1 (en) Compressor having output adjustment assembly including piston actuation

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14869073

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase in:

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14869073

Country of ref document: EP

Kind code of ref document: A1