WO2023207934A1

WO2023207934A1 - Vortex compression mechanism, and vortex compressor comprising same

Info

Publication number: WO2023207934A1
Application number: PCT/CN2023/090467
Authority: WO
Inventors: 梁计; 钱源
Original assignee: 谷轮环境科技（苏州）有限公司
Priority date: 2022-04-25
Filing date: 2023-04-25
Publication date: 2023-11-02

Abstract

A vortex compression mechanism and a vortex compressor comprising same. The vortex compression mechanism comprises a fixed vortex (22) and a moving vortex (24). A moving vortex head section (246) and a fixed vortex head section (226) define an exhaust cavity (E) in the following state: the exhaust cavity (E) is in a state of being about to be in fluid communication with a compression cavity but is not in fluid communication with the compression cavity. Concave flow guide grooves (2460) are provided on the inner wall of the moving vortex head section (246), so as to increase the flow of fluid from the compression cavity into the exhaust cavity (E) when the moving vortex head section (246) and the fixed vortex head section (226) are separated. The moving vortex head section (246) is configured to cover at least a portion of the at least one exhaust valve port (P) by the top surface (247) of the moving vortex head section (246) during operation, so as to prevent fluid communication between the compression cavity and the exhaust cavity (E) via the at least one exhaust valve port (P). The compression mechanism and the vortex compressor can reduce the power loss, improve the exhaust efficiency, prevent excessive compression, relieve or eliminate sudden pressure changes in the exhaust process, and improve the vortex strength, and the structure is simple and the cost benefit is high.

Description

Scroll compression mechanism and scroll compressor including same

This application claims priority to the following Chinese patent applications: a Chinese patent application with the application number 202210439484.4 and the invention name "Scroll compression mechanism and scroll compressor including the same" submitted to the China Patent Office on April 25, 2022. ; The Chinese patent application with the application number 202220969524.1 and the invention title "Scroll compression mechanism and scroll compressor including the same" was submitted to the China Patent Office on April 25, 2022. The entire contents of these patent applications are incorporated by reference into this application.

Technical field

The present disclosure relates to the field of scroll compressors, and more specifically, to a scroll compression mechanism and a scroll compressor including the same.

Background technique

This section provides background information related to the present disclosure that may not necessarily constitute prior art.

Scroll compressors can be used in refrigeration systems, air conditioning systems and heat pump systems, for example. A scroll compressor includes a scroll compression mechanism (also simply referred to as a "compression mechanism") for compressing a working fluid. The compression mechanism includes fixed scroll and orbiting scroll. The fixed scroll and the orbiting scroll are engaged to define a series of cavities that move from the radially outer side to the radially inner side and gradually become smaller in volume, including a suction chamber for sucking fluid, a compression chamber, and a cavity connected to the exhaust port for discharge. Exhaust chamber for compressed fluid.

Those skilled in the art have been committed to research on reducing the power loss of scroll compressors and/or improving exhaust efficiency.

Contents of the invention

This section provides a general summary of the disclosure and is not intended to be a comprehensive disclosure of the disclosure's full scope or all features of the disclosure.

An object of the present disclosure is to provide an improved scroll compression mechanism and scroll compressor that can reduce power loss and improve exhaust efficiency.

Another object of the present disclosure is to provide an improved scroll compression mechanism and scroll compressor that can avoid power loss due to excessive compression and can simultaneously Reduce or eliminate pressure sudden changes during the exhaust process.

Another object of the present disclosure is to provide an improved scroll compression mechanism and scroll compressor that can ensure the strength of the scroll and improve the scroll. The scroll compression mechanism and the scroll compressor have a simple structure, are easy to implement, and are highly cost-effective.

According to one aspect of the present disclosure, a scroll compression mechanism is provided, including:

a fixed scroll, the fixed scroll including a fixed scroll end plate and a fixed scroll wrap extending from one side of the fixed scroll end plate; and

An orbiting scroll, the orbiting scroll includes an orbiting scroll end plate and an orbiting scroll wrap extending from one side of the orbiting scroll end plate,

the fixed scroll is engaged with the orbiting scroll to define therebetween an open suction chamber, at least one closed compression chamber, and a discharge chamber at the center, arranged in sequence from radially outward to radially inward,

The fixed scroll end plate includes an exhaust port in fluid communication with the exhaust chamber and at least one exhaust valve port in fluid communication with the compression chamber for early exhaust,

The orbiting scroll wrap includes an orbiting scroll head section, the fixed scroll wrap includes a fixed scroll head section, and the orbiting scroll head section and the fixed scroll head section define The exhaust chamber in the following state: the exhaust chamber is about to be in fluid communication with the compression chamber but is not yet in fluid communication with the compression chamber, and is provided on the inner wall of the orbiting scroll head section There is a concave guide groove to increase the flow of fluid from the compression chamber into the exhaust chamber when the movable scroll head section and the fixed scroll head section are separated,

The orbiting scroll head section is configured to prevent passage through the at least one exhaust valve port by covering at least a portion of the at least one exhaust valve port with a top surface of the orbiting scroll head section during operation. The compression chamber is in fluid communication with the exhaust chamber.

Therefore, the scroll compression mechanism and the scroll compressor can reduce power loss and improve exhaust efficiency. Moreover, the scroll compression mechanism and scroll compressor can avoid power loss caused by excessive compression and can simultaneously alleviate or eliminate pressure sudden changes during the exhaust process.

According to one embodiment of the present disclosure, at least a portion of the guide groove extends to a top surface of the orbiting scroll head section.

According to one embodiment of the present disclosure, the guide groove is positioned at a predetermined distance from a top surface of the orbiting scroll head section.

According to an embodiment of the present disclosure, the flow guide groove is arranged to be smaller than the distance from the moving vortex vortex. The distance between the wrap and the root of the orbiting scroll end plate is closer to the top surface of the orbiting scroll head section. This will help improve the strength of the scroll root.

According to an embodiment of the present disclosure, the guide groove is arranged to extend a predetermined distance toward the inner end of the orbiting scroll head section from a starting point: the starting point is the orbiting scroll head section The position of the segment that is engaged with the fixed scroll head section and is about to begin to disengage from the fixed scroll head section.

According to an embodiment of the present disclosure, the guide groove is configured to have different recessed depths at different positions and has a maximum recessed depth at the starting point.

According to an embodiment of the present disclosure, the extension height of the guide groove in the axial direction of the scroll compression mechanism is less than or equal to 2/3 of the axial height of the orbiting scroll wrap to ensure that the wrap is strength.

According to an embodiment of the present disclosure, the recessed depth of the guide groove is less than or equal to 7/8 of the thickness of the corresponding section of the movable scroll head section to ensure the strength of the scroll.

According to an embodiment of the present disclosure, the thickness of the portion of the orbiting scroll head section where the guide groove is provided is greater than or equal to 0.5 mm.

According to one embodiment of the present disclosure, the flow channel is configured to include at least one section. In order to avoid undesirable early mixing of the compressed fluid while improving the exhaust gas flow efficiency.

According to another aspect of the present disclosure, a scroll compressor is provided, the scroll compressor including the scroll compression mechanism as described above.

In summary, it can be seen that the scroll compression mechanism and scroll compressor according to the present disclosure at least provide the following beneficial effects: the scroll compression mechanism and scroll compressor according to the present disclosure can reduce power loss and improve exhaust efficiency, and can avoid The power loss caused by excessive compression can simultaneously alleviate or eliminate the pressure sudden change during the exhaust process, while ensuring the strength of the scroll, improving the scroll, and has a simple structure, easy to implement, and high cost. benefit.

Description of the drawings

The foregoing and additional features and characteristics of the present disclosure will become more apparent from the following detailed description with reference to the accompanying drawings, which are by way of example only and are not necessarily drawn to scale. In the drawings, the same reference numbers refer to the same parts:

1 shows a schematic longitudinal cross-sectional view of a scroll compressor according to a first embodiment of the present disclosure;

Figure 2a shows an exploded view of the scroll compression mechanism of the scroll compressor in Figure 1;

Figure 2b shows a perspective view of the fixed scroll in Figure 2a;

Figure 2c shows a perspective view of the orbiting scroll in Figure 2a;

Figure 2d shows a side view of the assembled state of the scroll compression mechanism in Figure 2a and its corresponding K-K cross-sectional view;

Figure 2e shows a schematic diagram of the change process of the exhaust chamber defined by the orbiting scroll wrap and the fixed scroll wrap during the exhaust period of the scroll compressor;

3 a shows a perspective view of an orbiting scroll in a scroll compression mechanism according to a second embodiment of the present disclosure, showing a first side of the orbiting scroll;

Figure 3b shows a side view of the assembled state of the scroll compression mechanism according to the second embodiment of the present disclosure and its corresponding M-M cross-sectional view; and

Figure 3c shows a side view of the assembled state of the scroll compression mechanism according to the second embodiment of the present disclosure and its corresponding L-L cross-sectional view.

Detailed ways

Preferred embodiments of the present disclosure will now be described in detail with reference to Figures 1-3c. The following description is merely exemplary in nature and is not intended to limit the disclosure, its application or uses.

In the following exemplary embodiments, a vertical scroll compressor is taken as an example for convenience of description. However, the scroll compressor according to the present disclosure may also be any other suitable type of scroll compressor, such as a horizontal scroll compressor.

Figures 1 to 2e illustrate a first embodiment according to the present disclosure. The first embodiment will be described in detail below with reference to Figures 1 to 2e.

As shown in FIG. 1 , the scroll compressor 100 may include a casing 10 , an electric motor (including a stator 14 and a rotor 15 ), a drive shaft 16 , a main bearing seat 18 , an orbiting scroll 24 , and a fixed scroll 22 . The orbiting scroll 24 and the fixed scroll 22 constitute a scroll compression mechanism (hereinafter also referred to as "compression mechanism") CM suitable for compressing a working fluid (eg refrigerant), as better shown in Figures 2a and 2b , wherein the fixed scroll 22 includes the fixed scroll end plate 221, the fixed scroll wrap 222 and the exhaust port V located at the center of the fixed scroll end plate 221; the movable scroll 24 includes the movable scroll end plate 241, the movable scroll end plate 241 and the movable scroll end plate 241. The scroll wrap 242 and the hub 240 are joined by the fixed scroll wrap 222 and the movable scroll wrap 242 to define an air inlet to the compression mechanism CM in sequence from the radially outer side to the radially inner side in the compression mechanism CM (in the figure) (not shown) an open suction chamber in fluid communication for use in At least one closed compression chamber for fluid compression and an open exhaust chamber E in fluid communication with the exhaust port V (see Figure 2d and Figure 2e). There can be two or more closed compression chambers. The pressure of the radially inner compression chamber is higher than that of the radially outer compression chamber. In this article, for convenience of description, the compression chamber adjacent to the exhaust chamber E is called the high-pressure chamber H. In particular, regarding the exhaust chamber E, it should be noted that the exhaust chamber E in this article refers to the area defined by the fixed scroll wrap 222 and the orbiting scroll wrap 242 that is about to be fluidly connected to the high-pressure chamber H—that is, currently A cavity that is only fluidly connected to the exhaust port V is formed at the critical moment when the exhaust is finished and the next exhaust is about to occur but is not yet in fluid communication with the high-pressure chamber H. The exhaust chamber E will be described in detail below in conjunction with the "starting point A".

The electric motor includes a stator 14 and a rotor 15 . The rotor 15 is used to drive the drive shaft 16 to rotate about its rotation axis relative to the housing 10 . The fixed scroll 22 is fixed to the main bearing seat 18 and held in place, and the movable scroll 24 is driven by an electric motor via the drive shaft 16 so as to be able to perform translational rotation relative to the fixed scroll 22 by means of an Oldham slip ring 17 - —that is, orbiting (that is, the axis of the orbiting scroll 24 revolves relative to the axis of the fixed scroll 22, but both the orbiting scroll 24 and the fixed scroll 22 themselves do not rotate around their respective axes). As a result, the air inlet of the compression mechanism CM sucks in low-pressure fluid and compresses the fluid through a series of closed compression chambers, and then enters the exhaust chamber E and discharges the high-pressure fluid through the exhaust port V.

As shown in Figure 2d, during operation of the compression mechanism CM, a pair of high-pressure chambers H are defined in the compression mechanism CM, and the two high-pressure chambers H are adjacent to the radially central exhaust chamber E. At this time, the exhaust chamber E The current exhaust process in the chamber is over, and it will be fluidly connected to the two high-pressure chambers H for the next exhaust process. When the fluid can flow from the two high-pressure chambers H into the exhaust chamber E, the fluid is discharged through the exhaust port V as the orbiting scroll 24 rotates. After the fluid in the high-pressure chamber H is discharged, the compression chamber radially outside the high-pressure chamber H will be connected to the exhaust chamber E for the next exhaust process.

The inventor of the present application has studied the entire flow process of fluid in the scroll compression mechanism and found significant pressure changes of the fluid. For example, under certain working conditions, the fluid is compressed to a pressure higher than the required pressure. In addition, , a sudden change in pressure will occur when transitioning from one exhaust process to another. Based on these findings, the inventor of the present application proposed a solution that can simultaneously solve the power loss caused by these pressure changes.

Under certain operating conditions of the scroll compressor, the required discharge gas pressure may be less than the designed discharge pressure (ie, the designed fluid pressure discharged through the exhaust port V). Under these operating conditions, if the fluid is compressed into the exhaust chamber E and discharged through the exhaust port V, the phenomenon of over-compression of the fluid will occur. over The compressed fluid causes the scroll compression mechanism CM to do more unnecessary work, resulting in excessive power loss. In order to avoid over-compression of the fluid by the compression mechanism CM and loss of power, the fixed scroll end plate 221 may include at least one located near the exhaust chamber E, preferably but not limited to, in fluid communication with the high-pressure chamber H (see FIG. 2d ). An exhaust valve port P (see Figure 2b). The exhaust valve port P can preferably be closed by a valve such as an electronic valve and opened under certain conditions (such as a predetermined pressure) to discharge the fluid in the high-pressure chamber H to the exhaust port in advance before entering the exhaust chamber E. V, thus avoiding unnecessary further compression of the fluid. Multiple exhaust valve ports P may preferably be provided to communicate the two high-pressure chambers H to the exhaust chamber respectively. For example, as shown in FIG. 2b, four exhaust valve ports P are provided on radially opposite sides of the exhaust port V respectively. By providing the exhaust valve port P, power loss due to excessive compression can be avoided, and therefore the power consumption of the scroll compressor 100 can be reduced.

In addition, as shown in FIGS. 2d and 2e , the orbiting scroll wrap 242 includes an orbiting scroll head section 246 , the fixed scroll wrap 222 includes a fixed scroll head section 226 , the orbiting scroll head section 246 and The fixed scroll head section 226 jointly defines the above-mentioned exhaust chamber E - that is, the critical moment when the current exhaust is over and the next exhaust is about to start but is not yet in fluid communication with the high-pressure chamber H and is only connected to the exhaust port V. Fluidically connected cavities. At this time, the movable scroll head section 246 is joined to the fixed scroll head section 226 at the starting point A, and the fixed scroll head section 226 is joined to the movable scroll head section 246 at point B. That is, herein, the orbiting scroll head section 246 is defined as the section from the starting point A to the terminal end (ie, the radially inner end), and the fixed scroll head section 226 is defined as the section from B point to the terminal end (i.e., the radially inner end), and both define the exhaust chamber E.

In addition, it should be noted that, in order to facilitate the description of this article, the term names of the exhaust chamber E and the high-pressure chamber H will not change before and after the transition of different exhaust processes to avoid confusion or misunderstanding, as shown in Figure 2d, Figure 2e, Figure 3b, as shown in Figure 3c. Persons of ordinary skill in the art will understand that in actual work, each cavity changes and there is no fixed demarcation point.

2e shows a schematic diagram of the changing stages of the exhaust chamber E defined by the movable scroll head section 246 and the fixed scroll head section 226 during the discharge of the scroll compressor 100, in which the movable scroll head section 246 and the fixed scroll head section 226 are shown. The scroll head section 246 has a second configuration with guide grooves 2460 and a first configuration without guide grooves. It should be noted that the guide grooves 2460 in Figure 2e are only schematic. The actual shape and size of the guide groove 2460 are not specifically depicted. Specifically, as shown in the "first stage" in the first configuration, the orbiting scroll head section 246 and the fixed scroll head section 226 are engaged with each other to define the exhaust chamber E, at which time the "first stage""stage" refers to the critical stage before starting exhaust. At this time, the movable scroll head section 246 is in contact with the fixed scroll head section at the starting point A. Section 226 is engaged, and then enters the "second stage" - that is, the exhaust stage begins. At this time, the movable scroll head section 246 begins to disengage from the fixed scroll head section 226 at the starting point A, As a result, the fluid starts to flow from the high-pressure chamber H into the exhaust chamber E (as shown by the arrow in the figure), and exhaust begins. However, at this time, due to the movable scroll head section 246 and the fixed scroll head section 226 The gap between them is very small, the exhaust efficiency is very low, and may cause an instantaneous pressure increase in the high-pressure chamber H. As mentioned above, in order to improve the exhaust efficiency of the exhaust chamber E of the compression mechanism CM and alleviate the instantaneous pressure increase in the high-pressure chamber H, the inner wall of the orbiting scroll head section 246 facing the exhaust chamber E can be A guide groove 2460 is provided on 2466 to accelerate the flow of fluid from the high-pressure chamber H into the exhaust chamber E, thereby improving the exhaust efficiency and the working efficiency of the scroll compressor 100 . As shown in the schematic diagram of each stage in the second configuration of Figure 2e, by providing the guide groove 2460, the gap between the movable scroll head section 246 and the fixed scroll head section 226 can be significantly expanded, thereby improving the Exhaust efficiency.

The scroll compression mechanism according to the present application takes into account the technical problems of over-compression and sudden pressure changes during fluid travel, thereby significantly reducing power loss and thereby improving the efficiency of the scroll compressor. Generally, the setting of the exhaust valve port P will limit the structural improvement of the scroll wrap (especially the orbiting scroll wrap), because it often causes fluid leakage between adjacent cavities or a reduction in the strength of the scroll, etc. However, the inventor of the present application has proposed a solution that combines the exhaust valve port P with the improvement of the scroll. While optimizing the exhaust passage, the communication between the scroll compression chamber (especially the high-pressure chamber) and the exhaust chamber is eliminated. However, there is advance mixing before starting the exhaust (that is, when the expected pressure level is not reached, the compressed fluids in different chambers are mixed in advance through the exhaust valve port P), which further improves the performance of the scroll compressor. efficiency; at the same time, the root stress of the scroll is reduced through the improvement of the scroll structure design.

And, preferably, the guide groove 2460 is arranged to extend from the above-mentioned starting point A—that is, the starting point A is between the tip section 2260 of the fixed scroll head section 226 and the movable scroll head section 246 When disengagement is about to begin, the position on the orbiting scroll head section 246 that is in contact with the tip section 2260 is therefore in the stage where exhaust is just beginning—that is, the above-mentioned second stage, and the third stage—that is, , the exhaust stage when the gap is further expanded, can effectively accelerate the flow of fluid from the high-pressure chamber H into the exhaust chamber E.

It should be noted here that the slight section 2260 of the fixed scroll head section 226 only refers to a section of the fixed scroll head section 226 close to the terminal end in this article, and is not intended to specifically refer to the terminal end, that is, , the tip section 2260 that joins point A of the orbiting scroll head section 246 may preferably be its terminal end point, or it may be a certain position in the section at a certain distance from the terminal end point, although in this article In the disclosed embodiment, the portion that engages the starting point A of the orbiting scroll head section 246 is preferably the fixed scroll head section. 226 terminal endpoint, but it should be understood that there is no particular restriction on this.

As mentioned above, for the scroll compression mechanism CM and the scroll compressor 100 having both the exhaust valve port P and the guide groove 2460, since the orbiting scroll head section 246 includes the guide groove 2460, the orbiting scroll The axial top surface 247 of the head section 246 is narrowed, so there may be the following technical problems when the movable scroll 24 and the fixed scroll 22 abut each other to perform a compression operation: the movable scroll head section 246 At a certain moment, the top surface 247 cannot properly cover the exhaust valve port P and the exhaust valve port P spans both sides of the movable scroll head section 246 to fluidly communicate the spaces on both sides, thereby making it possible This results in a reduction in compression efficiency, which is undesirable. In order to solve this technical problem, the present disclosure improves the configuration of the guide groove 2460. Generally speaking, the guide groove 2460 according to the present disclosure is configured to enable the top surface 247 of the orbiting scroll head section 246 to operate During this period, the exhaust valve ports P are covered so that each exhaust valve port P does not, for example, span both sides of the movable scroll head section 246 and fluidly communicate the spaces on both sides.

The configuration of the guide groove 2460 will be described in detail below with reference to FIGS. 2c and 2d.

As shown in Figures 2c and 2d, in this embodiment the guide groove 2460 is preferably provided to extend to the top surface 247 of the orbiting scroll head section 246, and is preferably provided in two sections, That is, the guide groove 2460 includes a first groove section 2461 and a second groove section 2462 that are spaced apart from each other. That is, there is unremoved material included between the first groove section 2461 and the second groove section 2462. spacer section 2463. As mentioned before, the guide groove 2460 still preferably extends from the above-mentioned starting point A, that is, the first groove section 2461 starts from the starting point A, so as to better accelerate the exhaust, and more preferably, the first groove section 2461 extends from the starting point A. A groove section 2461 has a relatively larger recessed depth at the starting point A - that is, a depth recessed into the orbiting scroll head section 246 along the normal direction of the tangent plane of the inner wall 2466, so that it can be formed at the starting point A. Starting point A, that is, when exhaust is just beginning, the fluid is accelerated into the exhaust chamber E more quickly. In general, the guide groove 2460 is preferably configured to have different recessed depths at different locations, preferably with a maximum recessed depth near the starting point A. More preferably, the recessed depth of the guide groove 2460 is less than or equal to 7/8 of the thickness of the orbiting scroll head section 246, that is, the portion of the orbiting scroll head section 246 including the guide groove 2460 - That is, the thickness of the remaining portion after the material is removed should be no less than 1/8 of its original thickness, and more preferably, the portion of the orbiting scroll head section 246 including the guide groove 2460 - that is, The thickness of the remaining part after the material is removed is greater than or equal to 0.5mm, thereby ensuring that the part has the required strength.

Furthermore, preferably, the extension height of the guide groove 2460 in the axial direction of the scroll compression mechanism CM is less than or equal to 2/3 of the total axial height of the orbiting scroll wrap 246 to ensure required strength. And preferably, the guide groove 2460 is disposed closer to the top surface 247 of the orbiting scroll head section 246 as a whole. The root of the orbiting scroll end plate 241 is connected to the root of the orbiting scroll head section 246 away from the orbiting scroll head section 246 to ensure the strength of the orbiting scroll head section 246 .

Regarding the second groove section 2462, as shown in Figures 2c and 2c, the second groove section 2462 preferably extends to the terminal end of the orbiting scroll head section 246 to better accelerate the fluid throughout the exhaust process. flows into the exhaust chamber E. However, the present disclosure is not limited thereto. That is to say, the length (radius) of the guide groove 2460 extending along the profile direction of the orbiting scroll head section 246 can be set according to actual needs in order to achieve optimized exhaust gas. This effect ensures good coverage of the exhaust valve port P and ensures the strength of the scroll.

As for the spacing section 2463, its position and size can be set according to the actual situation - for example, the position and size of the exhaust valve port P, the strength requirements of the scroll part including the guide groove 2460, etc. The purpose is to: First, by providing the spacer section 2463, the exhaust valve port P can be better covered to improve compression efficiency; at the same time, the spacer section 2463 is conducive to further improving the strength of the scroll part including the guide groove 2460, especially It is beneficial to reduce the stress concentration at the connection root between the guide groove 2460 and the remaining scroll parts and the stress concentration at the connection root between the orbiting scroll head section 246 and the orbiting scroll end plate 241 .

Moreover, based on the purpose of this disclosure - to ensure good coverage of the exhaust valve port P, the recessed depth at various positions of the guide groove 2460 can be flexibly set according to the position and size of the exhaust valve port P, for example, Figure 2d As shown in , the first groove section 2461 and the second groove section 2462 each have different recessed depths at different locations; similarly, although the guide groove 2460 has a consistent axial height in this embodiment, However, the present disclosure is not limited thereto. According to, for example, the above-mentioned strength requirements, etc., the guide groove 2460 can be flexibly arranged to have different axial heights at different positions, and it is understood that the guide groove 2460 can also be arranged on the axis. It is upwardly multi-segmented, ie it includes a plurality of groove sections spaced apart in the axial direction.

In addition, although the guide groove 2460 is provided in two sections in the above embodiment, that is, including a first groove section 2461 and a second groove section 2462 spaced apart from each other, the present disclosure is not limited thereto, and it should be understood that Yes, in some cases, the guide groove 2460 can also be configured to include more sections—for example, three sections, four sections, etc., or it can be configured as a continuous single section at different locations. It has different recessed depths, as long as it can ensure good coverage of the exhaust valve port P. Moreover, according to actual conditions, the guide groove 2460 may have any suitable shape, and there is no particular limitation on this.

Although the guide groove 2460 in the above embodiment is configured to extend to the top surface 247 of the orbiting scroll head section 246 , it may also be configured not to extend to the top surface 247 of the orbiting scroll head section 246 . A second embodiment of the scroll compression mechanism CM according to the present disclosure will be described below with reference to Figures 3a to 3c, 3a shows a perspective view of the orbiting scroll 24 in the scroll compression mechanism CM according to the second embodiment of the present disclosure; FIG. 3b shows the assembled state of the scroll compression mechanism CM according to the second embodiment of the present disclosure. 3c shows a side view of the scroll compression mechanism CM and its corresponding LL cross-sectional view in an assembled state according to the second embodiment of the present disclosure. As shown in Figures 3a and 3b, the guide groove 2460 is provided in the form of a continuous single groove section, and as previously mentioned, the guide groove 2460 also preferably extends from the starting point A in this embodiment. , the difference is that the guide groove 2460 is configured not to extend to the top surface 247 of the orbiting scroll head section 246, so as not to occupy the area of the top surface 247. Specifically, FIG. 3b shows a cross-sectional view taken at the MM section closer to the orbiting scroll end plate 241, which shows the guide groove 2460; FIG. 3c shows a cross-section closer to the orbiting scroll wrap 242. The cross-sectional view taken at the LL section of the top surface 247, as can be seen from Figure 3c, the guide groove 2460 is not visible at the LL section, and the top surface 247 is complete and is not occupied by the guide groove 2460. This ensures that the exhaust valve port P is well covered and the exhaust efficiency is effectively improved.

Of course, it is conceivable that the guide groove 2460 in this embodiment can also be configured in a two-section or more-section configuration similar to that in the first embodiment. The only difference lies in the guide groove 2460 in this embodiment. The flow channels 2460 do not extend to the top surface 247 of the orbiting scroll head section 246 .

In addition, the present disclosure also provides a scroll compressor 100. The scroll compressor 100 includes a scroll compression mechanism CM according to the present disclosure. The scroll compression mechanism CM may be, for example, the scroll compression mechanism CM in the above embodiment. Or there could be other possible variations.

Experimental results show that by improving the guide groove as mentioned above, the working efficiency of the scroll compressor can be effectively improved by about 0.95%, while the power loss can be reduced by about 0.85%, and the CM of the scroll compression mechanism can be slightly increased. The capacity reaches about 0.16%.

Although exemplary embodiments of the scroll compression mechanism and the scroll compressor according to the present disclosure are described in the foregoing embodiments, the present disclosure is not limited thereto without departing from the scope of the present disclosure. , various modifications, replacements and combinations can be made.

It is obvious that various different implementations can be further designed by combining or modifying different implementations and technical features in different ways.

The scroll compression mechanism and the scroll compressor according to the preferred embodiments of the present disclosure are described above in conjunction with specific embodiments. It is to be understood that the above description is only illustrative and not restrictive, and those skilled in the art can think of various variations and modifications with reference to the above description without departing from the scope of the present disclosure. These variations and modifications are also included in the protection scope of the present disclosure.

Claims

A scroll compression mechanism, including:

a fixed scroll, the fixed scroll including a fixed scroll end plate and a fixed scroll wrap extending from one side of the fixed scroll end plate; and

An orbiting scroll, the orbiting scroll includes an orbiting scroll end plate and an orbiting scroll wrap extending from one side of the orbiting scroll end plate,

the fixed scroll is engaged with the orbiting scroll to define therebetween an open suction chamber, at least one closed compression chamber, and a discharge chamber at the center, arranged in sequence from radially outward to radially inward,

The fixed scroll end plate includes an exhaust port in fluid communication with the exhaust chamber and at least one exhaust valve port in fluid communication with the compression chamber for early exhaust,

The orbiting scroll wrap includes an orbiting scroll head section, the fixed scroll wrap includes a fixed scroll head section, and the orbiting scroll head section and the fixed scroll head section define The exhaust chamber in the following state: the exhaust chamber is about to be in fluid communication with the compression chamber but is not yet in fluid communication with the compression chamber, and is provided on the inner wall of the orbiting scroll head section There is a concave guide groove to increase the flow of fluid from the compression chamber into the exhaust chamber when the movable scroll head section and the fixed scroll head section are separated,

The orbiting scroll head section is configured to prevent passage through the at least one exhaust valve port by covering at least a portion of the at least one exhaust valve port with a top surface of the orbiting scroll head section during operation. The compression chamber is in fluid communication with the exhaust chamber.
The scroll compression mechanism according to claim 1, wherein at least a portion of the guide groove extends to a top surface of the orbiting scroll head section.
The scroll compression mechanism according to claim 1, wherein the guide groove is positioned at a predetermined distance from the top surface of the orbiting scroll head section.
The scroll compression mechanism according to claim 3, wherein the guide groove is disposed closer than a distance from a root of the orbiting scroll wrap connected to the orbiting scroll end plate. Near the top surface of the orbiting scroll head section.
The scroll compression mechanism according to claim 1, wherein the guide groove is arranged to extend a predetermined distance toward the inner end of the orbiting scroll head section from the following starting point: the starting point is The position where the orbiting scroll head section is engaged with the fixed scroll head section and is about to begin to disengage from the fixed scroll head section.
The scroll compression mechanism according to claim 5, wherein the guide groove is configured to have different concave depths at different positions and has a maximum concave depth at the starting point.
The scroll compression mechanism according to claim 1, wherein the extension height of the guide groove in the axial direction of the scroll compression mechanism is less than or equal to 2 times the axial height of the orbiting scroll wrap. /3.
The scroll compression mechanism according to claim 1, wherein the recessed depth of the guide groove is less than or equal to 7/8 of the thickness of the corresponding section of the orbiting scroll head section.
The scroll compression mechanism according to claim 1, wherein the thickness of the portion of the orbiting scroll head section where the guide groove is provided is greater than or equal to 0.5 mm.
The scroll compression mechanism according to claim 2 or 3, characterized in that the guide groove is configured to include at least one section.
A scroll compressor comprising the scroll compression mechanism according to any one of claims 1-10.