WO2014198215A1

WO2014198215A1 - Scroll compressor, fixed scroll member and orbiting scroll member

Info

Publication number: WO2014198215A1
Application number: PCT/CN2014/079588
Authority: WO
Inventors: 崔永华; 范忆文; 韩艳春
Original assignee: 艾默生环境优化技术(苏州)有限公司
Priority date: 2013-06-14
Filing date: 2014-06-10
Publication date: 2014-12-18

Abstract

A scroll compressor, fixed scroll member and orbiting scroll member, the scroll compressor comprising: a compression mechanism (10), comprising a fixed scroll member (20) and an orbiting scroll member (30), the fixed scroll member (20) comprising a fixed scroll end plate (22) and a fixed scroll (24), the orbiting scroll member (30) comprising an orbiting scroll end plate (32) and an orbiting scroll (34), the fixed scroll (24) and the orbiting scroll (34) being joined to one another to define a plurality of compression chambers (C), the compression chambers (C) comprising first compression chambers (C1) and second compression chambers (C2); an exhaust port (40), suitable for communicating with the first compression chambers (C1); and an emission space, suitable for communicating with the exhaust port (40). The first compression chambers (C1), the exhaust port (40) and the emission space form a high pressure area. The scroll compressor also comprises a communication passage (50, 50A), arranged so that at least one of the second compression chambers (C2) and the high pressure area can communicate before a scroll separation point. The pressure of the first/central compression chamber in the present device can be changed more gradually, thereby effectively suppressing high noise levels and improving the energy efficiency ratio and working stability of the scroll compressor.

Description

Scroll compressors and fixed scroll components and moving scroll components

[01] This application is required to be submitted to the Chinese Patent Office on June 14, 2013, application number 201310237705.0, and the Chinese patent application entitled "Vortex Compressor and Fixed Scroll Parts and Moving Scroll Parts" and in 2013 On June 14th, the Chinese Patent Office, the application number is 201320343769.4, the title of the invention is "Vortex Compressor and the fixed scroll component and the movable scroll component, the priority of the Chinese patent application, the entire contents of which are incorporated herein by reference. Application. Technical field

The present invention relates to a scroll compressor and a fixed scroll member and an orbiting scroll member, and more particularly to a scroll compressor having an improvement in pressure fluctuation of a central compression chamber. Background technique

[03] A scroll compressor includes a compression mechanism composed of a fixed scroll member and an orbiting scroll member. The fixed scroll member includes a substantially spiral constant scroll extending from the end plate thereof, and the movable scroll member includes a substantially spiral movable scroll extending from the end plate thereof. The spiral fixed scroll and the helical moving scroll are engaged to define a plurality of closed crescent compression chambers therebetween. The orbiting scroll member is driven by, for example, an electric motor to perform translational rotation with respect to the fixed scroll member (that is, the axis of the orbiting scroll member revolves with respect to the axis of the fixed scroll member, but the orbiting scroll member and the fixed scroll member The scroll members themselves do not rotate about their respective axes, thereby causing the volume of the compression chamber defined by the spiral fixed scroll and the helical orbiting scroll to gradually move from the radially outer side to the radially inner side. From big to small. Thus, the pressure in the compression chamber is also gradually increased, so that the refrigerant in the compression chamber is compressed and finally discharged from the exhaust port located at the center of the fixed scroll member, thereby achieving the suction, compression, and discharge of the refrigerant. cycle.

[04! In each compression chamber, a compression chamber (also referred to as central compression) at the center of the scroll member that communicates with the exhaust port and is capable of communicating with a discharge space (high pressure chamber) defined between the muffler plate and the front end cover The chamber or high pressure compression chamber has the highest pressure, while the pair of compression chambers (also referred to as secondary high pressure compression chambers) located radially outward of the central compression chamber and adjacent to the central compression chamber have a second highest pressure. With the translational rotation of the orbiting scroll member, the central compression chamber is connected to the secondary high pressure compression chamber at a certain rotation angle of the orbiting scroll member (corresponding to the scroll separation point where the fixed scroll and the movable scroll are separated) A new central compression chamber is formed, and the compression chamber, which is originally located on the radially outer side of the secondary high pressure compression chamber, becomes a new secondary high pressure compression chamber. [Θ5] When the higher pressure central compression chamber communicates with the lower pressure secondary high pressure compression chamber, the pressure in the central compression chamber drops sharply. This pressure drop in the central compression chamber and large pressure fluctuations can cause problems. First of all, especially for small-sized air conditioner scroll compressors, such large pressure fluctuations cause high noise problems. In particular, in the case where an exhaust valve (HVE) is provided at the exhaust port, the elastic flap of the exhaust valve may strongly impinge on, for example, the valve seat due to such large fluctuations in pressure, causing abnormal noise. Secondly, especially when the compressor is in a low compression ratio condition, such large pressure fluctuations may deteriorate the energy efficiency ratio and working stability of the compressor, thereby adversely affecting the energy efficiency ratio and working stability of the entire refrigeration system.

[06] In order to suppress such noise, a muffler Μ may be provided at the exhaust port (as shown in Fig. 14, wherein Fig. 14 is a perspective view showing the muffler according to the related art). However, in the case of a muffler, it is generally only possible to suppress noise (e.g., high frequency noise) in a part of the frequency range in the entire frequency band. Moreover, due to the arrangement of the silencer, a pressure drop is also caused to adversely affect the performance of the compressor and the entire refrigeration system. In addition, the additional provision of the muffler can complicate the manufacturing process, increase the manufacturing cost, and require additional installation space for the muffler due to an increase in the number of components, and at the same time deteriorate the operational reliability of the compressor accordingly.

[07] Here, it should be noted that the technical content provided in this section is intended to facilitate the understanding of the present invention by those skilled in the art, and does not necessarily constitute the prior art. Summary of the invention

The general summary of the invention is provided in this section, rather than the full scope of the invention or the full disclosure of all features of the invention.

SUMMARY OF THE INVENTION An object of the present invention is to provide a scroll compressor capable of reducing a pressure difference between a first/center compression chamber and a second/second pressure chamber during a wrap separation point.

Another object of the present invention is to provide a scroll compressor capable of making the pressure change of the center compression chamber more gentle without a sudden pressure drop at the wrap separation point.

Another object of the present invention is to provide a scroll compressor capable of suppressing high noise and abnormal noise.

[12] Another object of the present invention is to provide a scroll compressor capable of suppressing noise on an entire frequency band including a high frequency range.

[! 3] Another object of the present invention is to provide a scroll compressor capable of improving the energy efficiency ratio and operational stability of a compressor. In order to achieve one or more of the above objects, according to one aspect of the present invention, a scroll compressor is provided. The scroll compressor includes: a compression mechanism including a fixed scroll member and an orbiting scroll member, the fixed scroll member including a fixed scroll end plate and a predetermined extension from the fixed scroll end plate a scroll, the orbiting scroll member including an orbiting scroll end plate and a movable scroll extending from the movable scroll end plate, the fixed scroll and the movable scroll being engaged with each other to be in the fixed scroll Defining a plurality of compression chambers between the orbiting scroll, the compression chamber including a first compression chamber at a substantially radial center of the compression mechanism and a radially outer side of the first compression chamber and a second compression chamber adjacent to the first compression chamber; an exhaust port disposed at a substantially radial center of the fixed scroll end plate and adapted to communicate with the first compression chamber; And a discharge space adapted to communicate with the exhaust port. The first compression chamber, the exhaust port, and the discharge space constitute a high pressure region. The scroll compressor further includes a communication passage that is disposed such that at least one of the second compression chambers and the high pressure region can begin to communicate before a wrap separation point.

[15] In order to achieve one or more of the above objects, according to another aspect of the present invention, a fixed scroll member is provided, the fixed scroll member including a fixed scroll end plate and a fixed scroll end a fixed scroll extending from the plate, the fixed scroll and the movable scroll of the corresponding movable scroll member being engaged with each other to define a plurality of compression chambers between the fixed scroll and the movable scroll, the compression The chamber includes a first compression chamber at a substantially radial center of the fixed scroll member and a second compression chamber located radially outward of the first compression chamber and adjacent to the first compression chamber, wherein The fixed scroll member further includes a communication passage disposed at the fixed scroll end plate such that at least one of the second compression chambers and the first compression chamber can be before the scroll separation point Start to communicate.

[16] In order to achieve one or more of the above objects, according to another aspect of the present invention, an orbiting scroll member is provided, the orbiting scroll member including an orbiting scroll end plate and the movable scroll end a movable scroll extending from the plate, the movable scroll being engaged with a fixed scroll of the corresponding fixed scroll member to define a plurality of compression chambers between the movable scroll and the fixed scroll, the compression The chamber includes a first compression chamber at a substantially radial center of the orbiting scroll member and a second compression chamber located radially outward of the first compression chamber and adjacent to the first compression chamber, wherein The movable scroll member further includes a communication passage disposed at the movable scroll end plate such that at least one of the second compression chambers and the first compression chamber can be before the scroll separation point Start to communicate.

[17] According to the present invention, by providing the communication groove, the first/center pressure at which the wrap is separated can be made The pressure difference between the condensing chamber and the second/second high pressure compression chamber is reduced, so that the pressure change in the central compression chamber can be made gentler without a pressure dip at the vortex separation point.

[18] Therefore, in particular, for a scroll compressor for a small air conditioner, for example, a high noise problem can be effectively suppressed. In particular, in the case where the exhaust valve/check valve is provided at the exhaust port, it is possible to effectively suppress the valve flap of the exhaust valve from strongly striking, for example, the valve seat to cause abnormal noise. Moreover, it is possible to suppress noise on the entire frequency band including the high frequency range.

[19] In addition, especially when the compressor is in a low compression ratio condition, the energy efficiency ratio and working stability of the compressor can be improved, thereby improving the energy efficiency ratio and working stability of the entire refrigeration system.

[2 In addition, the use of the silencer can be eliminated. Thereby, it is possible to avoid causing a pressure drop to adversely affect the performance of the compressor and the entire refrigeration system. Moreover, it is avoided to additionally provide a muffler to avoid complicated manufacturing processes, increased manufacturing costs, and additional installation space for the muffler due to an increase in the number of components, while ensuring the operational reliability of the compressor accordingly. DRAWINGS

The features and advantages of the present invention will become more apparent from the following detailed description of the appended claims.

1 is a perspective view showing a fixed scroll member of a compression mechanism according to a first embodiment of the present invention;

2 is a perspective view showing an orbiting scroll member of a compression mechanism according to a first embodiment of the present invention;

Figure 3 is a longitudinal sectional perspective view showing a fixed scroll member according to a first embodiment of the present invention;

Figure 4 is a longitudinal sectional perspective view showing a fixed scroll member according to a modification of the first embodiment of the present invention;

Figure 5 is a schematic view showing a state in which the compression mechanism according to the first embodiment of the present invention is before the wrap separation point;

[27] Fig. 6 is a schematic view showing a state in which the compression mechanism according to the first embodiment of the present invention is at a wrap separation point;

Figure 7 is a view showing a compression mechanism according to a first embodiment of the present invention at a wrap separation point Schematic diagram of the post state;

Figure 8 is a longitudinal sectional perspective view showing a fixed scroll member of a compression mechanism according to a second embodiment of the present invention;

Figure 9 is a schematic view showing a state in which the compression mechanism according to the second embodiment of the present invention is before the wrap separation point;

Figure 10 is a schematic view showing a state in which a compression mechanism according to a second embodiment of the present invention is at a wrap separation point;

Figure 32 is a schematic view showing a state in which the compression mechanism according to the second embodiment of the present invention is after the wrap separation point;

Figure 23 is a graph showing an exemplary variation of the pressure of the central compression chamber and the secondary high pressure compression chamber according to the present invention and according to the related art as a function of the wrap angle;

[34] FIG. 13 is an exploded perspective view showing an exhaust valve that can be applied to the compressor according to the present invention;

Fig. 14 is a perspective view showing a muffler according to the related art. detailed description

The invention will be described in detail below with reference to the accompanying drawings, by way of exemplary embodiments. The following detailed description of the invention is intended for purposes of illustration,

First, the structure of a compression mechanism of a scroll compressor according to a first embodiment of the present invention will be described with reference to Figs. 1 to 7, wherein Fig. 1 is a view showing a fixed scroll of a compression mechanism according to a first embodiment of the present invention. 2 is a perspective view showing a movable scroll member of a compression mechanism according to a first embodiment of the present invention, and FIG. 3 is a longitudinal sectional perspective view showing a fixed scroll member according to a first embodiment of the present invention. 4 is a longitudinal sectional perspective view showing a fixed scroll member according to a modification of the first embodiment of the present invention, and FIG. 5 is a schematic view showing a state before the compression mechanism according to the first embodiment of the present invention is in a state before the scroll separation point. 6 is a schematic view showing a state in which the compression mechanism according to the first embodiment of the present invention is at the wrap separation point, and FIG. 7 is a view showing a state in which the compression mechanism according to the first embodiment of the present invention is after the wrap separation point. schematic diagram.

A scroll compressor according to a first embodiment of the present invention includes a fixed scroll member 20 and a moving The compression mechanism 10 of the scroll member 30. The fixed scroll member 20 includes a fixed scroll 24 extending from its end plate 22, for example, in a generally spiral shape, and the orbiting scroll member 30 includes a movable scroll 34 extending from its end plate 32, for example, in a generally spiral shape. The fixed scroll 24 and the movable scroll 34 are engaged with each other to define a plurality of closed crescent-shaped compression chambers C therebetween. The orbiting scroll member 30 is driven by, for example, an electric motor (not shown) to perform translational rotation with respect to the fixed scroll member 20 (i.e., the axis of the orbiting scroll member 30 with respect to the axis of the fixed scroll member 20) Revolving, but both the orbiting scroll member 30 and the fixed scroll member 20 do not rotate about their respective axes, thereby causing the compression chamber C defined by the fixed scroll 24 and the orbiting scroll 34 to be radially outward. During the process of moving radially inward, the volume gradually decreases from large to small. Thus, the pressure in the compression chamber C is also gradually increased, so that the working fluid (e.g., refrigerant) in the compression chamber C is compressed and finally from the exhaust port 40, for example, at the center of the end plate 22 of the fixed scroll member 20. Discharge, thereby achieving a working cycle of suction, compression and discharge of the working fluid.

[39] in each compression chamber C, a compression chamber that is in communication with the exhaust port 40 and is capable of communicating with a discharge space (high pressure chamber) defined between the muffler plate and the front end cover at the center of the scroll member (also referred to as a compression chamber) a first compression chamber or a central compression chamber or a high pressure compression chamber, and used as the high pressure zone according to the present invention) C1 has the highest pressure, and a pair of compression chambers located radially outward of the central compression chamber C1 and adjacent to the central compression chamber C1 (Also referred to as a second compression chamber or a secondary high pressure compression chamber, and as a secondary high pressure region according to the present invention) C2 has a second highest pressure. With the translational rotation of the orbiting scroll member 30, a certain orbiting angle (vortex angle) of the orbiting scroll member 30 (corresponding to the fixed scroll and the movable scroll - specifically the fixed scroll and the movable scroll The corresponding scroll portion is separated from the scroll separation point), the central compression chamber C1 is in communication with the secondary high pressure compression chamber C2 and merged into a new central compression chamber, while the compression chamber adjacent to the radially outer side of the secondary high pressure compression chamber C2 is originally located. (Also known as the third compression chamber) C3 becomes a new secondary high pressure compression chamber.

According to the first embodiment of the present invention, a communication groove 50 (see Figs. 1 to 3) for connecting the central compression chamber C1 and the secondary high pressure compression chamber C2 is provided. Specifically, the communication groove 50 is disposed to advance the central compression chamber C1 and the secondary high pressure compression chamber C2 in advance before the scroll separation point. Here, it is to be noted that, in the first embodiment, the communication groove 50 is used as the communication passage (the pressure fluctuation restricting means for suppressing the pressure fluctuation of the center compression chamber) according to the present invention.

[41] The dynamic scroll angle (also referred to as the separation point scroll angle) at a certain scroll separation point is assumed to be 0 degrees, and the dynamic scroll angle before the scroll separation point is assumed to be positive. In the case of the communication groove 50, the central compression chamber C1 and the secondary high pressure compression chamber C2 may be brought into communication when the dynamic scroll angle is less than 360 degrees and greater than 0 degrees. In one example, the communication slot 50 can The central compression chamber C1 and the secondary high pressure compression chamber C2 are brought into communication to be set such that the movable scroll angle is less than 180 degrees and greater than 20 degrees. In another example, the communication groove 50 may be configured to initiate communication between the central compression chamber C1 and the secondary high pressure compression chamber C2 when the dynamic scroll angle is less than 150 degrees and greater than 30 degrees. In another example, the communication groove 50 may be configured to initiate communication between the central compression chamber C1 and the secondary high pressure compression chamber C2 when the orbiting scroll angle is less than 120 degrees and greater than 40 degrees. In another example, the communication groove 50 may be disposed to initiate communication between the central compression chamber C1 and the secondary high pressure compression chamber C2 when the dynamic scroll angle is 80 degrees. By appropriately setting the dynamic scroll angle at the start of communication, it is possible to contribute to ensuring proper communication between the central compression chamber C1 and the secondary high pressure compression chamber C2.

Fig. 12 is a graph showing an exemplary variation of the pressure of the central compression chamber and the secondary high pressure compression chamber according to the present invention and according to the related art with the scroll angle. In Fig. 12, the curve ABCDEF represents the pressure change of the central compression chamber of the compression mechanism according to the related art (i.e., the communication groove/communication path is not provided), and the curve A'-B'-C'-D represents the compression mechanism according to the related art. The pressure change of the secondary high pressure compression chamber, the curve ABDEF represents the pressure change of the central compression chamber C1 of the compression mechanism 10 according to the present invention (i.e., the communication tank/communication passage 50 is provided), and the curve A'-B'-D represents The pressure of the secondary high pressure compression chamber C2 of the compression mechanism 10 of the present invention changes. In addition, in Fig. 12, the wrap angle corresponding to the C point and the C' point is the separation point wrap angle (X (the separation point wrap angle in the figure (assumed to be 53 degrees), and the B point and B' The wrap angle corresponding to the point is a wrap angle (also referred to as a communication start wrap angle) in which the center compression chamber C1 and the sub-high pressure compression chamber C2 start to communicate with each other via the communication groove 50 in the case where the communication groove 50 is provided. It should be noted that the connection start scroll angle β generally depends on the position at which the communication groove 50 is disposed, particularly the position of the communication groove 50 as to be described below as the outer end.

[43] As can be seen from Fig. 12, the communication start scroll angle β is 133 degrees, that is, the communication groove 50 is set to 80 degrees (i.e., 133 degrees - 53 degrees) before the wrap separation point to make the center compression chamber C1. It is in early communication with the secondary high pressure compression chamber C2. Thus, as shown in Fig. 12, the pressure change (curve ABDEF) of the central compression chamber C1 according to the present invention is gentler without a pressure dip as compared with the pressure change (curve ABCDEF) of the central compression chamber according to the related art. Case (as indicated by the section CD in the curve ABCDEF according to the related art). Meanwhile, the pressure change of the secondary high-pressure compression chamber C2 according to the present invention (curve A'-B'- compared with the pressure change of the secondary high-pressure compression chamber according to the related art (curve A'-B'-C'-D) D) is more gradual without a sudden increase in pressure (as indicated by the section C'-D in the curve A'-B'-C'-D according to the related art). On the other hand, the transition section T1 of the pressure drop of the central compression chamber C1 according to the present invention is more the transition section T2 according to the pressure drop of the central compression chamber according to the related art. The length is thereby able to release the pressure of the central compression chamber C1 to the secondary high pressure compression chamber C2 in advance to avoid a pressure dip in the scroll separation point (the separation point wrap angle (X).

The communication groove 50 may be provided to the end plate 22 of the fixed scroll member 20 and/or the end plate 32 of the movable scroll member 30 (e.g., the mutually facing surfaces of the end plate 22 and the end plate 32). Specifically, in one example, the communication groove 50 is provided only to the end plate 22 of the fixed scroll member 20, and in another example, the communication groove 50 is provided only to the end plate 32 of the orbiting scroll member 30, and in another In the example, the communication groove 50 is provided at both the end plate 22 of the fixed scroll member 20 and the end plate 32 of the movable scroll member 30.

[4] In the illustrated example (see Figs. 1 and 2), the communication groove 50 may be in the form of an elongated groove and has an inner end 51 and an outer end 52. As shown in Fig. 6, when the orbiting scroll member 30 is at the separation point wrap angle (X (i.e., when the compression mechanism 10 is at the wrap separation point), the inner end 51 is in fluid communication with the central compression chamber C1, and the outer end 52 has It is in fluid communication with the secondary high pressure compression chamber C2.

[46] As shown in Fig. 1, the inner end 51 of the communication groove 50 at the fixed scroll member 20 can be connected to the exhaust port 40 (also used as the high pressure region according to the present invention). However, it will be understood by those skilled in the art that the position at which the inner end 51 of the communication groove 50 at the fixed scroll member 20 is disposed is not limited thereto.

In the illustrated example (see Fig. 2), the communication groove 50 at the orbiting scroll member 30 may include an enlarged portion 53 at a substantially radial center of the end plate 32 of the orbiting scroll member 30. The enlarged portion 53 facilitates an appropriate increase in the advance communication between the central compression chamber C1 and the secondary high pressure compression chamber C2 before the scroll separation point. The enlarged portion 53 may be substantially circular (as viewed in the axial direction of the compressor) or may have other suitable shapes as shown.

[48] In the illustrated example (see Fig. 3), the cross-sectional shape of the communication groove 50 may be substantially rectangular.

In a modification of the first embodiment, as shown in Fig. 4, the cross-sectional shape of the communication groove 50 may be substantially semicircular.

According to the present invention, the flow area of the communication groove 50 (for example, when the orbiting scroll member 30 is at the separation point wrap angle (the effective cross-sectional area of the communication groove 50 that connects the central compression chamber C1 and the secondary high pressure compression chamber C2, and The flow area is generally related to the depth and width of the communication groove 50. It may be appropriately changed depending on the specific application (for example, the compressor model). In one example, the flow area of the communication groove 50 may be l-15 mm ² (square In another example, the flow area of the communication groove 50 may be 2-10 mm ² . In another example, the communication groove The flow area of 50 can be 5mm ²

[5] In summary, those skilled in the art should understand that the position of the inner end 51 of the groove 50, the position of the outer end 52 of the communication groove 50, and the shape of the communication groove 50 (as seen when viewed in the axial direction of the compressor) The shape), the cross-sectional shape of the communication groove 50 (the cross-sectional shape taken along the axial direction of the compressor), the flow area of the communication groove 50, and even the specific installation position of the communication groove 50 can be appropriately changed as long as the wrap separation point can be (Before the separation point wrap angle (X), at least one of the central compression chamber C1 and the second high pressure compression chamber C2 is prematurely communicated at an appropriate timing and the central compression chamber C1 and the secondary high pressure compression chamber C2 can be moderately connected (ie, avoided) Small communication or excessive communication - excessive communication causes leakage loss of the compressor), thereby ensuring that the pressure change of the central compression chamber C1 is more gentle without a sudden pressure drop.

In an alternative example, the communication groove 50 may be arranged to advance the central compression chamber C1 in advance with each of the pair of two secondary high pressure compression chambers C2 prior to the scroll separation point. Although not shown, for example, for the fixed scroll member 20 shown in FIG. 1, an additional elongated communication groove may be additionally provided, which may be opposed to the elongated communication groove 50 from the exhaust port. That side extends radially and may extend to the outside of the innermost portion of the fixed scroll 24. In a preferred example, the additional communication groove may be symmetrical with respect to the center of the fixed scroll member 20 with respect to the communication groove 50 in shape, size, and arrangement position.

According to the present invention, an exhaust valve V including a flap VR may be disposed at the exhaust port 40 (as shown in FIG. 13 , wherein FIG. 13 is a view showing an exhaust valve that can be applied to the compressor according to the present invention An exploded perspective view) to restrict the return of working fluid from the discharge space to the compression mechanism 10 via the exhaust port 40.

According to the first embodiment of the present invention, by providing the communication groove, the pressure difference between the central compression chamber and the secondary high pressure compression chamber at the time of the scroll separation point can be reduced, and the pressure change of the central compression chamber can be made gentler. There is no pressure dip in the wrap separation point.

Therefore, in particular, for a scroll compressor for a small air conditioner, for example, a high noise problem can be effectively suppressed. In particular, in the case where the exhaust valve is provided at the exhaust port, it is possible to effectively suppress the valve flap of the exhaust valve from strongly striking, for example, the valve seat to cause an abnormal noise. Moreover, it is possible to suppress noise on the entire frequency band including the high frequency range. In this regard, according to tests, for a small scroll compressor of a certain type, the use of the communication groove/communication path according to the present invention can reduce the noise by about 7 dBA.

『S6』 In addition, especially when the compressor is in a low compression ratio, the compression can be improved. The energy efficiency ratio and working stability of the machine are beneficial to improve the energy efficiency ratio and working stability of the entire refrigeration system. In this respect, according to tests, for a certain type of scroll compressor, the communication groove/communication path according to the present invention can increase the energy efficiency ratio under low compression ratio conditions.

2.8%, and the average energy efficiency ratio of the compressor under various conditions can be increased by about 1.9%.

[57] In addition, the use of the silencer can be eliminated. Thereby, it is possible to avoid causing a pressure drop to adversely affect the performance of the compressor and the entire refrigeration system. Moreover, it is avoided to additionally provide a muffler to avoid complicated manufacturing processes, increased manufacturing costs, and additional installation space for the muffler due to an increase in the number of components, while ensuring the operational reliability of the compressor accordingly.

[58] Hereinafter, a structure of a compression mechanism of a scroll compressor according to a second embodiment of the present invention will be described with reference to FIGS. 8 to 11, wherein FIG. 8 is a view showing a fixed scroll of a compression mechanism according to a second embodiment of the present invention. A longitudinal sectional view of the component, FIG. 9 is a schematic view showing a state before the compression mechanism according to the second embodiment of the present invention is at the wrap separation point, and FIG. 10 is a view showing the compression mechanism according to the second embodiment of the present invention. A schematic view of a state at the time of separating the dots, and FIG. 11 is a schematic view showing a state in which the compression mechanism according to the second embodiment of the present invention is after the wrap separation point.

[59! The difference between the second embodiment and the first embodiment is basically merely to provide a communication hole instead of the communication groove. Therefore, the same or similar aspects of the second embodiment as those of the first embodiment will not be repeatedly described herein.

According to a second embodiment of the present invention, a central compression chamber C1 (serving as a high pressure region according to the present invention) and a secondary high pressure compression chamber C2 (serving as a secondary high pressure region according to the present invention) are directly or indirectly connected. (i.e., through the exhaust port 40 - the exhaust port 40 also serves as the high pressure region according to the present invention) the communication hole 50A (see Fig. 8). Specifically, the communication hole 50A is disposed to advance the central compression chamber C1 and the secondary high pressure compression chamber C2 in advance before the scroll separation point. Here, it is to be noted that, in the second embodiment, the communication hole 50A serves as a communication passage (pressure fluctuation restricting means for suppressing pressure fluctuation of the center compression chamber) according to the present invention.

The communication hole 50A may be provided in the end plate 22 of the fixed scroll member 20 and/or the end plate 32 of the movable scroll member 30. In the illustrated example (see Fig. 8), the communication hole 50A may have an inner opening 51A and an outer opening 52A. As shown in Fig. 10, when the orbiting scroll member 30 is at the separation point wrap angle (X (i.e., when the compression mechanism 10 is at the wrap separation point), the inner opening is in fluid communication with the central compression chamber C1, and the outer opening 52A has been The secondary high pressure compression chamber C2 is in communication.

[62] As shown in Fig. 8, the inner opening 51A of the communication hole 50A at the fixed scroll member 20 may be connected to the exhaust port 40 (i.e., open to the wall of the exhaust port 40) such that the communication hole 50A (at least in shape) At the section where the flow is effective, it is substantially L-shaped. However, it will be understood by those skilled in the art that the installation position of the inner opening 51A of the communication hole 50A at the fixed scroll member 20 is not limited thereto, for example, the inner opening 51A of the communication hole 50A at the fixed scroll member 20 may not be connected to The exhaust port 40 is such that the communication hole 50A (at least at the section where the effective flow is formed) is substantially U-shaped. In addition, in one example, the cross-sectional shape of the communication hole 50A may be substantially circular.

According to the second embodiment of the present invention, by providing the communication hole, it is apparent that the pressure difference between the central compression chamber and the secondary high pressure compression chamber at the time of the scroll separation point can be reduced, so that the pressure change of the central compression chamber can be further changed. Gentle without a sudden drop in pressure at the point of separation of the scroll. Therefore, the scroll compressor according to the second embodiment can provide substantially the same advantageous effects as those of the scroll compressor according to the first embodiment described above.

The scroll compressor according to the present invention can accommodate a variety of different variations.

[65] For example, in the second embodiment described above, one end (inner end) of the communication hole communicates with the central compression chamber or the exhaust port, and the other end (outer end) communicates with the secondary high pressure compression chamber, however, the communication The one end of the hole may also extend to communicate with a discharge space/high pressure chamber (serving as a high pressure zone according to the present invention) defined between the muffler plate and the front end cover. In particular, such a communication passage (serving as a pressure fluctuation restricting means for suppressing pressure fluctuation of the center compression chamber according to the present invention) may be provided, which may be extended axially through the end plate of the fixed scroll member The axial through bore and the tubular member extending from the axial through bore to the discharge space are configured such that the discharge space communicates with the secondary high pressure compression chamber at an appropriate time prior to the scroll separation point. In this way, the pressure in the secondary high pressure compression chamber can be additionally raised before the scroll separation point, so that the pressure difference between the central compression chamber and the secondary high pressure compression chamber at the time of the scroll separation point is reduced, thereby making the central compression chamber The pressure changes are more gradual without a sudden drop in pressure at the point of separation of the scroll. According to this modification, it is also possible to provide substantially the same advantageous effects as those of the scroll compressor according to the first embodiment as described above.

[66] In summary, in the scroll compressor according to the present invention, the following advantageous solutions can be included.

[67] an orbital angle of the orbiting scroll at the wrap separation point is defined as a separation point wrap angle, and the orbiting scroll passes through the communication path in the second compression chamber and the high pressure region The orbiting angle at the start of communication is defined as a communication start scroll angle, and the communication passage is disposed such that the communication start scroll angle is advanced by 20 to 180 degrees from the separation point scroll angle.

The communication passage is disposed such that the communication start scroll angle is 30 degrees to 150 degrees ahead of the separation point scroll angle.

[69] the communication passage is disposed such that the communication start wrap angle is larger than the separation point wrap angle The degree is advanced by 40 degrees to 120 degrees.

The communication passage is disposed such that the communication start scroll angle is advanced by 80 degrees from the separation point wrap angle.

[71] The communication passage is provided in at least one of the fixed scroll end plate and the movable scroll end plate.

The communication passage is a communication groove formed on the surface of the scroll end plate adapted to cause the second compression chamber to communicate with the first compression chamber in advance.

[73] The cross-sectional shape of the communication groove is substantially rectangular or substantially semi-circular.

In the case where the communication groove is provided in the fixed scroll end plate, the communication groove extends to the exhaust port.

In the case where the communication passage is provided in the movable scroll end plate, the communication passage includes an enlarged portion located at a substantially radial center of the movable scroll end plate.

The communication passage is a communication hole formed in the scroll end plate adapted to cause the second compression chamber to communicate with the first compression chamber in advance.

[77] In a case where the communication passage is provided in the fixed scroll end plate, the communication passage is formed in the fixed vortex adapted to cause the second compression chamber to communicate with the exhaust port in advance Connect the turns in the end plate.

The communication passage is adapted to communicate the second compression chamber with the discharge space. A tubular member extending to the discharge space to the discharge space is formed.

The communication passage has a flow area that enables a pressure dip in the first compression chamber to be avoided and a leakage loss in the scroll compressor to be avoided.

8Γ each of the second compression chambers is capable of starting communication with the high pressure zone before the scroll separation point, and the communication passages are symmetrically disposed about a central axis of the compression mechanism.

The scroll compressor further includes an exhaust valve disposed at the exhaust port, the exhaust valve including a valve flap.

The exemplary embodiments make various changes.

Claims

Claim

A scroll compressor comprising:

a compression mechanism (10), the compression mechanism (10) comprising a fixed scroll member (20) and an orbiting scroll member (30), the fixed scroll member (20) comprising a fixed scroll end plate (22) and a slave a fixed scroll (24) extending from the fixed scroll end plate (22), the fixed scroll (24) of the orbiting scroll member (30) and the movable scroll (3^) are engaged with each other to A plurality of compression chambers (C) are defined between the fixed scroll (24) and the movable scroll (34), the compression chamber (C) including a substantially radial center of the compression mechanism (10) a first compression chamber (C1) at the first compression chamber (C1) and a second compression chamber (C2) located radially outward of the first compression chamber (C1) and adjacent to the first compression chamber (C1);

An exhaust port (40) disposed at a substantially radial center of the fixed scroll end plate (22) and adapted to communicate with the first compression chamber (C1);

a discharge space, the discharge space being adapted to communicate with the exhaust port (40)

Wherein the first compression chamber (Cl), the exhaust port (40) and the discharge space constitute a high pressure zone (C1, 40),

The scroll compressor further includes a communication passage (50, 50A) that is disposed such that at least one of the second compression chambers (C2) and the high pressure region (C1, 40) ) Ability to begin communication before the wrap separation point.

2. The scroll compressor according to claim 1, wherein

An orbital angle of the orbiting scroll (34) at the wrap separation point is defined as a split point wrap angle (a), and the orbiting scroll (34) is in the second compression chamber (C2) The orbital angle when the high-pressure zone (C1, 40) starts to communicate through the communication passage (50, 50A) is defined as the communication start wrap angle (β),

The communication passage (50, 50A) is disposed such that the communication start scroll angle (β) is 20 degrees to 180 degrees ahead of the separation point scroll angle ((X).

The scroll compressor according to claim 2, wherein said communication passage (50, 50Α) It is set such that the communication start scroll angle (β) is 30 degrees to 150 degrees ahead of the separation point wrap angle ((X).

The scroll compressor according to claim 3, wherein the communication passage (50, 50Α) is disposed such that the communication start scroll angle (β) is larger than the separation point scroll angle ((X) 40 degrees to 120 degrees in advance.

The scroll compressor according to claim 4, wherein the communication passage (50, 50?) is disposed such that the communication start scroll angle (?) is larger than the separation point wrap angle ((X) 80 degrees in advance.

The scroll compressor according to claim 1, wherein the communication passage (50, 50Α) is provided in the fixed scroll end plate (22) and the movable scroll end plate (32) At least one.

The scroll compressor according to claim 6, wherein the communication passage (50) is formed to be in advance communication between the second compression chamber (C2) and the first compression chamber (C1) A communication groove (50) on the surface of the scroll end plate.

The scroll compressor according to claim 7, wherein the communication groove (50) has a substantially rectangular or substantially semicircular cross-sectional shape.

9. The scroll compressor according to claim 7, wherein, in a case where the communication groove (50) is provided in the fixed scroll end plate (22), the communication groove (50) extends to the Exhaust port (40).

The scroll compressor according to claim 7, wherein, in a case where the communication passage (50) is provided to the movable scroll end plate (32), the communication passage (50) includes a location An enlarged portion (53) at a substantially radial center of the scroll end plate (32) is described.

The scroll compressor according to claim 6, wherein the communication passage (50Α) A communication hole (50A) formed in the scroll end plate adapted to advance the second compression chamber (C2) in communication with the first compression chamber (C1).

The scroll compressor according to claim 6, wherein in the case where the communication passage (50A) is provided to the fixed scroll end plate (22), the communication passage (50A) is suitable A communication hole (50A) formed in the fixed scroll end plate (22) in advance communication between the second compression chamber (C2) and the exhaust port (40).

The scroll compressor according to claim 1, wherein the communication passage is adapted to communicate the second compression chamber (C2) with the discharge space.

The scroll compressor according to claim 13, wherein the communication passage is extended from an axial through hole extending axially through the fixed scroll end plate (22) and extends from the axial through hole A tubular member is formed to the discharge space.

The scroll compressor according to any one of claims 1 to 14, wherein the communication passage (50, 50A) has a condition that enables a pressure dip in the first compression chamber (C1) to be avoided and It is possible to avoid a flow area in which the scroll compressor has a leakage loss.

The scroll compressor according to any one of claims 1 to 14, wherein each of the second compression chambers (C2) is capable of being scrolled with the high pressure region (Cl, 40) The communication is started before the separation point, and the communication passages (50, 50A) are symmetrically arranged with respect to the central axis of the compression mechanism (10).

The scroll compressor according to any one of claims 1 to 14, wherein the scroll compressor further includes an exhaust valve (V) disposed at the exhaust port (40), Exhaust valve

(V) Includes the lobes (VR).

18. A fixed scroll member (20), the fixed scroll member (20) comprising a fixed scroll end plate (22) and a fixed scroll (24) extending from the fixed scroll end plate (22) , the fixed scroll (24) interengaging with the orbiting scroll (34) of the corresponding orbiting scroll member (30) to define a plurality of compression chambers between the fixed scroll (24) and the orbiting scroll (34) ( C), the compression chamber (C) includes a first compression chamber (C1) at a substantially radial center of the fixed scroll member (20) and a radially outer side of the first compression chamber (C1) and a second compression chamber (C2) adjacent to the first compression chamber (C1), wherein the fixed scroll member (20) further includes a communication passage

(50, 50A), the communication passage (50, 50A) is disposed at the fixed scroll end plate (22) such that at least one of the second compression chamber (C2) is opposite to the first compression The chamber (C1) is able to start communication before the scroll separation point.

19. An orbiting scroll member (30), the orbiting scroll member (30) comprising an orbiting scroll end plate (32) and a movable scroll (34) extending from the orbiting scroll end plate (32) The movable scroll (34) and the fixed scroll (24) of the corresponding fixed scroll member (20) are engaged with each other to define between the movable scroll (34) and the fixed scroll (24) a plurality of compression chambers (C) including a first compression chamber (C1) at a substantially radial center of the orbiting scroll member (30) and a first compression chamber (C1) a second compression chamber (C2) radially outward and adjacent to the first compression chamber (C1), wherein the orbiting scroll member (20) further includes a communication passage (50, 50A), the communication A passage (50, 50A) is provided at the movable scroll end plate (32) such that at least one of the second compression chambers (C2) and the first compression chamber (C1) can be separated from the scroll Start connecting before the point.