CN110985376A

CN110985376A - Scroll structure of compressor

Info

Publication number: CN110985376A
Application number: CN201910289431.7A
Authority: CN
Inventors: 蔡孟谚; 杨尧斌; 梁坤億; 刘阳光; 张钰炯
Original assignee: Industrial Technology Research Institute ITRI
Current assignee: Industrial Technology Research Institute ITRI
Priority date: 2018-10-03
Filing date: 2019-04-11
Publication date: 2020-04-10
Anticipated expiration: 2039-04-11
Also published as: CN110985376B; TW202014606A; TWI680234B

Abstract

The invention relates to a scroll structure of a compressor, which comprises a fixed scroll and an orbiting scroll. The fixed scroll includes a fixed scroll base having a fluid discharge port and a fixed scroll blade. The orbiting scroll includes an orbiting scroll base and orbiting scroll blades. The scroll structure has at least one pre-cutting part, which defines that when the fixed scroll tip of the fixed scroll blade and the orbiting scroll tip of the orbiting scroll blade contact each other in the exhaust stage of the compressor, the outer surface of the fixed scroll tip, the outer surface of the orbiting scroll tip, the outer surface of the fixed scroll base and the outer surface of the orbiting scroll base surround a central region together. The fluid discharge port is located in the central region. The precut part is also positioned in the central area and positioned on at least one of the surfaces of the fixed scroll and the orbiting scroll adjacent to each other.

Description

Scroll structure of compressor

Technical Field

The present invention relates to a scroll structure of a compressor, and more particularly, to a scroll structure having at least one precut portion.

Background

A compressor is a device that introduces a working fluid into a closed space, increases the internal pressure thereof by compressing the volume of the space in which the original working fluid is dispersed, and converts mechanical energy into pressure energy, and common application fields include air conditioning, refrigeration cycle, providing industrial driving power, and the like. And may be classified into reciprocating, rotary, screw, scroll compressors, etc. according to the way of compressing the working fluid. Among them, a scroll compressor (scroll compressor) has advantages of high efficiency, energy saving, low noise, etc., so its application is increasing.

The compression mode of the Scroll compressor is formed by two Scroll bodies which are arranged in a staggered way, wherein one Scroll body is a Fixed Scroll (Fixed Scroll), the other Scroll body is an orbiting Scroll (OrbitingScroll) which can orbit relative to the Fixed Scroll, and the orbiting Scroll moves around the Fixed Scroll, so that a compression chamber between the Fixed Scroll and the orbiting Scroll generates volume change, and working fluid is guided, compressed and discharged.

However, the conventional scroll compressor has a problem in that improvement is required. In the process of compressing the working fluid, the working fluid is gradually compressed into a high-temperature and high-pressure state, which is most obvious at a fluid discharge port with the highest compression force, that is, the temperature rise of the working fluid to the position is the most severe, which causes the fixed scroll and the orbiting scroll to generate obvious thermal expansion, and further causes unexpected interference and friction between the two scrolls. As a result, the interference and friction generate friction noise and friction heat to raise the internal temperature again, which not only consumes the entire operation kinetic energy but also reduces the operation efficiency, and furthermore, wears or damages the fixed scroll and the orbiting scroll.

Disclosure of Invention

Accordingly, the present invention is directed to a scroll structure of a compressor, which can solve the problems of interference, friction and extension of the scroll of the conventional scroll compressor during operation.

The present invention discloses a scroll structure of a compressor, which comprises a fixed scroll and an orbiting scroll. The fixed scroll includes a fixed scroll base and a fixed scroll blade erected on one side of the fixed scroll base, wherein the fixed scroll base has a fluid discharge port. The orbiting scroll includes an orbiting scroll base and an orbiting scroll blade erected on the orbiting scroll base, the orbiting scroll being rotatable with respect to the fixed scroll. The scroll structure has at least one precut part, and defines that when a fixed scroll tip part of the fixed scroll blade and an orbiting scroll tip part of the orbiting scroll blade are contacted with each other in a compressor exhaust stage, the outer surface of the fixed scroll tip part, the outer surface of the orbiting scroll tip part, the outer surface of the fixed scroll base and the outer surface of the orbiting scroll base jointly surround a central area, wherein fluid discharge ports are all positioned in the central area, and at least one precut part is positioned in the central area and positioned on at least one of the adjacent surfaces of the fixed scroll and the orbiting scroll.

In the scroll structure disclosed by the invention, because the at least one precutting part is positioned in the central area surrounded by the outer surfaces of the structures such as the fixed scroll base, the fixed scroll tip part, the orbiting scroll base and the orbiting scroll tip part, and the precutting part is positioned on at least one of the adjacent surfaces of the fixed scroll and the orbiting scroll, namely the precutting part is designed in the area with higher internal temperature when the compressor is in operation, the precutting part is favorable for avoiding the problems of interference and friction when the fixed scroll tip part and the orbiting scroll tip part are thermally expanded due to high operating temperature, thereby avoiding the problems of noise and temperature rise caused by friction of the fixed scroll and the orbiting scroll, being favorable for maintaining the characteristics of low noise and high operating efficiency of the scroll structure and prolonging the service life.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

Fig. 1 is an exploded view of a scroll compressor and a scroll structure according to a first embodiment of the present invention.

Fig. 2 is a perspective view of the fixed scroll of fig. 1.

Fig. 3 is a perspective view of the orbiting scroll of fig. 1.

FIG. 4 is an assembled side sectional view of the scroll structure of the first embodiment of the present invention.

Fig. 5 is a graph showing simulation data of the amount of thermal expansion deformation of the fixed wrap according to the first embodiment of the present invention.

Fig. 6 is a graph showing simulation data of the amount of thermal expansion deformation of the orbiting scroll according to the first embodiment of the present invention.

Fig. 7 is a partially enlarged view of fig. 4.

Fig. 8 is a front view of the fixed scroll of fig. 2.

FIG. 9 is a side sectional, partially enlarged view of a scroll configuration in accordance with a second embodiment of the present invention.

Fig. 10 is a front view of the fixed scroll of fig. 9.

FIG. 11 is a front view of the orbiting scroll of FIG. 9.

FIG. 12 is a side sectional, partially enlarged schematic view of a scroll configuration in accordance with a third embodiment of the present invention.

FIG. 13 is an enlarged side sectional view of a scroll configuration according to a fourth embodiment of the present invention.

FIG. 14 is an enlarged side sectional view of a scroll configuration according to a fifth embodiment of the present invention.

FIG. 15 is an enlarged side sectional view of a scroll configuration according to a sixth embodiment of the present invention.

FIG. 16 is a side sectional, partially enlarged schematic view of a scroll configuration in accordance with a seventh embodiment of the present invention.

FIG. 17 is a side sectional, partially enlarged schematic view of a scroll configuration in accordance with an eighth embodiment of the present invention.

FIG. 18 is a side sectional, partially enlarged schematic view of a scroll configuration in accordance with a ninth embodiment of the present invention.

Fig. 19 is a partially enlarged view illustrating a fixed scroll according to a tenth embodiment of the present invention.

Wherein the reference numerals

1a scroll structure

9 scroll compressor, compressor

10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h, 10i, 10j fixed scroll

20a, 20b, 20c, 20d, 20e, 20f, 20g, 20h orbiting scroll

110a, 110b, 110c fixed scroll base

111a, 111b, 111c, 111d, 111e, 111f, 111g fixed scroll root

120a, 120b fixed scroll blade

121a, 121b, 121c, 121d, 121e, 121f, 121g, 121h, 121i, 121j fixed scroll tip

210a, 210b orbiting scroll base

211a, 211b, 211c, 211d, 211e, 211f, 211g orbiting scroll root

220a, 220b orbiting scroll blade

221a, 221b, 211c, 221d, 221e, 221f, 221g orbiting scroll tip

1101a, 1101b fixed scroll base inner surface

1102a, 1102b, 1102c fixed scroll base outer surface

1103 fluid suction inlet

1104 fluid discharge port

1201a, 1201b fixed scroll blade inner surface

1202a, 1202b, 1202c fixed scroll blade outer surface

1203a fixed scroll blade top surface

2101a, 2101b orbiting scroll base inner surface

2102a, 2102b, 2102c wrap outer surface of the base of the orbiting scroll

2201a, 2201b orbiting scroll blade inner surface

2202a, 2202b, 2202c orbiting scroll blade outer surface

2203a orbiting scroll blade tip

C1, C2, C3 center region

Da1, Da2, Db1, Db2, Dc1, Dc2, Dc3, Dc4, Dd1, Dd2, Dd3, De1, De2, De3, Df1, Df2, Df3, Dg1, Dg2, Dg3, Dh1, Dh2, Di1, Dj1 precut part

α f coefficient of thermal expansion of fixed scroll material

α O orbiting scroll having a material coefficient of thermal expansion

Lf fixed scroll height

Lo orbiting scroll height

P1, P2 contact point

S compression chamber

Delta T temperature rise, temperature difference

Detailed Description

The detailed features and advantages of the present invention are described in detail in the following embodiments, which are sufficient for one skilled in the art to understand the technical content of the present invention and to implement the present invention, and the related objects and advantages of the present invention can be easily understood by those skilled in the art from the disclosure, claims and drawings of the present specification. The following examples further illustrate aspects of the present invention in detail, but are not intended to limit the scope of the invention in any way.

In addition, the embodiments of the present invention will be disclosed in the drawings and, for the purpose of clarity, numerous implementation details will be set forth in the description below. It should be understood, however, that these implementation details are not intended to limit the invention.

Also, some conventional structures and components may be shown in simplified schematic form in the drawings for the purpose of clarity. In addition, some features of the drawings may be slightly enlarged or changed in scale or size to facilitate understanding and viewing of the technical features of the invention, but the invention is not limited thereto. The actual dimensions and specifications of the product manufactured according to the teachings of the present invention may be adjusted according to manufacturing requirements, the nature of the product, and the teachings of the present invention as disclosed below. Meanwhile, reference coordinate axes are attached to the drawings for the convenience of viewing the drawings.

In addition, terms such as "end," "section," "portion," "region," "section," and the like may be used hereinafter to describe a particular feature or feature of or on or between particular elements or structures, but these elements or structures are not limited by these terms. The term "and/or" may also be used hereinafter to refer to a combination including one or all of the associated listed components or structures. The terms "substantially", "substantially" and "approximately" may also be used hereinafter in conjunction with ranges of dimensions, concentrations, temperatures or other physical or chemical properties or characteristics, and are intended to cover deviations that may exist in the upper and/or lower limits of the ranges of properties or characteristics, or that represent acceptable deviations from manufacturing tolerances or from analytical procedures, which still achieve the desired results.

Furthermore, unless otherwise defined, all words or terms used herein, including technical and scientific words and terms, have their ordinary meanings as understood by those skilled in the art. Furthermore, the definitions of the above-mentioned words or terms should be construed in this specification to have meanings consistent with the technical fields related to the present invention. Unless specifically defined, these terms and phrases are not to be construed in an idealized or formal sense unless expressly so defined.

Referring to fig. 1 to 4, fig. 1 is an exploded view of a scroll compressor and a scroll structure according to a first embodiment of the present invention, fig. 2 is a perspective view of a fixed scroll of fig. 1, fig. 3 is a perspective view of an orbiting scroll of fig. 1, and fig. 4 is an assembled side sectional view of the scroll structure according to the first embodiment of the present invention.

The present embodiment provides a scroll structure 1a, which is adapted to be mounted on a housing (not numbered) as shown in the figure to constitute a compressor 9 together with the housing. The Compressor 9 is a Scroll Compressor (Scroll Compressor), which may be, but not limited to, an oil-free or oil-containing Scroll Compressor. It should be noted that the scroll structure of the following other embodiments of the present invention is also suitable for being installed in the housing to form a scroll compressor, but the present invention is not limited to the way that the scroll structure is installed in the housing of the compressor 9 or other compressors. It is understood that the housing of the compressor 9 may contain other components and structures necessary to realize the driving scroll structure 1a and the complete compression operation, but the invention is not limited thereto. In addition, the scroll structure 1a or the scroll structures of other embodiments of the present invention can be adaptively adjusted according to the specification of the compressor 9 or other compressors, such as the size or the assembly manner, and the present invention is not limited thereto. Hereinafter, description will be given first with respect to the scroll structure 1 a.

In the present embodiment, the scroll structure 1a includes a fixed scroll 10a and an orbiting scroll 20 a. The orbiting scroll 20a is movably disposed at one side of the fixed scroll 10a to orbit relative to the fixed scroll 10a, for example, the orbiting scroll 20a may orbit relative to the fixed scroll 10a in an eccentric manner.

The fixed scroll 10a includes a fixed scroll base 110a and a fixed scroll blade 120 a. The fixed scroll base 110a has a fixed scroll base inner surface 1101a and a fixed scroll base outer surface 1102a facing away from each other. The fixed scroll blade 120a is shaped like a spiral plate and is erected on one side of the fixed scroll base 110a, and as shown, the fixed scroll blade 120a is erected on a fixed scroll base inner surface 1101a of the fixed scroll base 110 a.

In addition, the fixed scroll base 110a further has at least one fluid suction port 1103 and a fluid discharge port 1104. The fluid suction port 1103 is located on the fixed scroll base 110a closer to the outer ring of the fixed scroll blade 120a, and the number thereof may be, but not limited to, one or more, and may be communicated with a source of working fluid (not shown, but not limited to, gaseous, liquid or gas-liquid mixture with flow characteristics) to allow the working fluid to be injected into the scroll structure 1 a. The fluid discharge port 1104 is located on the fixed scroll base 110a closer to the center of the fixed scroll blade 120a, and is adapted to discharge the working fluid entering the inside of the scroll structure 1 a.

Further, the fixed scroll blade 120a has a fixed scroll tip portion 121a, which refers to the portion of the fixed scroll blade 120a closer to the center thereof (or the portion of the fixed scroll blade 120a closer to or surrounding the end of the portion of the fluid discharge port 1104). In addition, fixed scroll blade 120a has a fixed scroll blade inner surface 1201a, a fixed scroll blade outer surface 1202a, and a fixed scroll blade top surface 1203 a. The fixed scroll blade inner surface 1201a refers to a side surface of the fixed scroll blade 120a facing toward the fluid discharge port 1104, the fixed scroll blade outer surface 1202a refers to another side surface of the fixed scroll blade 120a facing away from the fluid discharge port 1104, and the fixed scroll blade top surface 1203a refers to a surface of the fixed scroll blade 120a between the fixed scroll blade inner surface 1201a and the fixed scroll blade outer surface 1202a and facing away from the fixed scroll base 110a (or a surface facing the orbiting scroll 20 a). In other embodiments, the stationary scroll blade top surface 1203a of the stationary scroll blade 120a may be designed as a groove (not shown) for filling with wear-resistant material, but the invention is not limited thereto.

In addition, the fixed scroll base 110a further has a fixed scroll root 111a, which is located on a fixed scroll base inner surface 1101a of the fixed scroll base 110a, and refers to a portion of the fixed scroll base 110a near the center of the fixed scroll blade 120a (or refers to a portion located on the fixed scroll base 110a around the fluid discharge port 1104). In this or other embodiments, the fixed scroll root 111a of the fixed scroll base 110a refers to a portion of the fixed scroll base 110a near the center of the fixed scroll blade 120a and surrounded by the fixed scroll blade inner surface 1201a of the fixed scroll blade 120a, and the fluid discharge port 1104 is located within the fixed scroll root 111 a.

Orbiting scroll 20a, on the other hand, includes an orbiting scroll base 210a and an orbiting scroll blade 220 a. Orbiting scroll base 210a has an orbiting scroll base inner surface 2101a and an orbiting scroll base outer surface 2102a facing away from each other. 1-3, an orbiting scroll base inner surface 2101a of orbiting scroll base 210a and a fixed scroll base inner surface 1101a of fixed scroll base 110a face each other. The orbiting scroll blade 220a is shaped like a spiral plate and is erected at one side of the orbiting scroll base 210a, and as shown in the drawing, the orbiting scroll blade 220a is erected on an inner surface 2101a of the orbiting scroll base 210a and is correspondingly disposed in a spiral space surrounded by the fixed scroll blade 120 a. In this configuration, a compression chamber S (shown in fig. 4) is surrounded by a fixed scroll base inner surface 1101a of the fixed scroll base 110a, the fixed scroll blade 120a, an orbiting scroll base inner surface 2101a of the orbiting scroll base 210a, and the orbiting scroll blade 220 a. In operation, the orbiting scroll 20a may orbit relative to the fixed scroll 10a, such that the orbiting scroll blade 220a orbits relative to the fixed scroll blade 120a to continuously change the shape of the compression chamber S, thereby continuously compressing the working fluid entering the compression chamber S from the fluid suction port 1103 and guiding and pushing the working fluid to the fluid discharge port 1104 for discharge.

In addition, the orbiting scroll blade 220a has an orbiting scroll tip portion 221a, which is a portion of the orbiting scroll blade 220a closer to the center thereof (or a portion of the orbiting scroll blade 220a closer to one end of the fluid discharge port 1104 or one end of the fixed scroll tip portion 121 a). In addition, orbiting scroll blade 220a has an orbiting scroll blade inner surface 2201a, an orbiting scroll blade outer surface 2202a and an orbiting scroll blade top surface 2203 a. The orbiting scroll blade inner surface 2201a refers to a side surface of the orbiting scroll blade 220a facing toward the fluid discharge port 1104, the orbiting scroll blade outer surface 2202a refers to another side surface of the orbiting scroll blade 220a facing away from the fluid discharge port 1104, and the orbiting scroll blade top surface 2203a refers to a surface of the orbiting scroll blade 220a between the orbiting scroll blade inner surface 2201a and the orbiting scroll blade outer surface 2202a and facing away from the orbiting scroll base 210a (or a surface facing the fixed scroll 10 a). In other embodiments, the orbiting scroll blade top surface 2203a of the orbiting scroll blade 220a may be designed with a groove for filling with wear-resistant material, but the invention is not limited thereto.

In addition, orbiting scroll base 210a also has an orbiting scroll root 211a on an orbiting scroll base inner surface 2101a of orbiting scroll base 210a, which refers to a portion of orbiting scroll base 210a near the center of orbiting scroll blade 220a (or refers to a portion of orbiting scroll base 210a corresponding to fluid discharge port 1104 or corresponding to fixed scroll root 111a of fixed scroll base 110a in the axial direction).

Fig. 5 to 6 are graphs showing simulation data of thermal expansion deformation of the fixed scroll 10a and the orbiting scroll 20a according to the first embodiment of the present invention, which indicate the thermal expansion deformation of the fixed scroll 10a and the orbiting scroll 20a in the axial direction when the scroll compressor 9 using the scroll structure 1a of the present embodiment is in operation. As can be seen, the fixed scroll blade 120a of the fixed scroll 10a and the orbiting scroll blade 220a of the orbiting scroll 20a are deformed in the axial direction in a sharp manner near the inside (i.e., near the center of the fluid discharge port 1104), because, as described above, when the orbiting scroll 20a revolves relative to the fixed scroll 10a to the exhaust stage to discharge the working fluid from the fluid discharge port 1104, a very high pressure is generated to suddenly raise the temperature of the working fluid, resulting in a very significant thermal expansion of the portions of the fixed scroll blade 120a and the orbiting scroll blade 220a near the inside. The exhaust stage refers to a stage in which the orbiting scroll revolves relative to the fixed scroll so that the working fluid is most strongly compressed at the fluid discharge port, at this time, the tip of the orbiting scroll contacts the inner surface of the fixed scroll by the leading edge thereof, the tip of the fixed scroll contacts the inner surface of the orbiting scroll by the leading edge thereof, and the working fluid is pressed between the tip of the orbiting scroll and the tip of the fixed scroll at a high pressure and discharged from the fluid discharge port. Therefore, it can be understood that the tip portions of the fixed scroll and the orbiting scroll in the embodiments and other embodiments refer to portions of the fixed scroll and the orbiting scroll that generate the aforementioned obvious thermal expansion phenomenon during operation.

In view of this, in the present embodiment and other embodiments, at least one pre-cut portion may be designed on the scroll structure and located on at least one of the fixed scroll and the orbiting scroll. The pre-cut portion is a portion that is used for compensating for the pre-removal due to thermal expansion deformation caused by high temperature on at least one of the fixed scroll and the orbiting scroll, and the pre-cut portion may be obtained by cutting or etching the fixed scroll and/or the orbiting scroll of various removable portions or other manners that may process substantially the same structure on the fixed scroll and/or the orbiting scroll, and the present invention is not limited to the manner of designing the pre-cut portion. In the present embodiment, the scroll structure 1a has a pre-cut portion Da1 (fig. 2) and a pre-cut portion Da2 (fig. 3) respectively disposed on the fixed scroll blade 120a and the orbiting scroll blade 220 a. However, it should be noted that the embodiment is only an example of the position of the precut portion, and the invention is not limited thereto.

In detail, as shown in fig. 7 (which is a partial enlarged view of fig. 4), the precut portions Da1 and Da2 are located in a central region C1. The central region C1 is a region surrounded by the outer surface 1102a of the fixed scroll base 110a, the outer surface 1202a of the fixed scroll blade at the fixed scroll tip 121a (i.e., the outer surface of the fixed scroll tip 121 a), the outer surface 2202a of the orbiting scroll blade at the orbiting scroll tip 221a (i.e., the outer surface of the orbiting scroll tip 221 a), and the outer surface 2102a of the orbiting scroll base 210a when the fixed scroll tip 121a and the orbiting scroll tip 221a are in contact with each other at the front edge during the exhaust phase of the compressor. It will be appreciated that the central region C1 is intended to encompass regions of higher internal temperature when the compressor is in operation. The pre-cut portions Da1 and Da2 are located in a defined central region C1, and the fluid discharge port 1104 is also located in the central region C1.

Further, pre-cut portion Da1 is located on fixed scroll blade top surface 1203a at fixed scroll tip portion 121a of fixed scroll blade 120a (i.e., referring to the top surface of fixed scroll tip portion 121 a), such that fixed scroll tip portion 121a appears stepped from a side view.

The axial depth of pre-cut portion Da1 on fixed scroll tip 121a is related to the amount of thermal expansion deformation in the height direction of fixed scroll tip 121a after being heated, where "axial" and "height direction" are directions horizontal to the rotation axis of orbiting scroll 20a, for this purpose, the Coefficient of Thermal Expansion (CTE) of the material of fixed scroll 10a is obtained as α f, fixed scroll 10a has a fixed scroll height Lf, the internal environment of scroll structure 1a (or the compression chamber S surrounded between fixed scroll 10a and orbiting scroll 20 a) is increased by Δ T (i.e., temperature difference) after scroll structure 1a is at rest to operate for a predetermined time, in this embodiment, the axial depth of pre-cut portion Da1 on fixed scroll tip 121a is substantially proportional to af × α f × Δ T, that is, the axial depth of pre-cut portion Da1 on fixed scroll tip 121a is adjusted by the axial depth of pre-cut portion Da α after being heated, but the actual amount of thermal expansion deformation is not determined by the actual amount of thermal expansion in the axial direction of pre-cut portion la.

It should be noted that the aforementioned coefficient of thermal expansion of the material refers to a coefficient of regularity that the geometric characteristics of the material change with the change of temperature under the effect of expansion with heat and contraction with cold, and the coefficient of thermal expansion α f of the material may be different according to the material of the fixed scroll 10a, but the present invention is not limited thereto, the fixed scroll height Lf refers to the maximum axial distance between the fixed scroll blade top surface 1203a of the fixed scroll blade 120a and the fixed scroll base inner surface 1101a of the fixed scroll base 110a, i.e., the axial distance between the fixed scroll blade top surface 1203a at the fixed scroll tip 121a of the fixed scroll blade 120a having the pre-cut portion Da1 and the fixed scroll base inner surface 1101a of the fixed scroll base 110a, and the temperature rise Δ T, which is generally the temperature difference between the operating temperature before and after the compressor starts to operate for a predetermined time, therefore, both the temperature rise Δ T and the predetermined time required for the temperature rise Δ T are not used for limiting the present invention, as long as the axial depth of the pre-cut portion can be adjusted according to the actual conditions, the internal operating temperature (the internal operating temperature) of the present invention may be close to the fluid outlet, but is not limited to the present invention.

On the other hand, fig. 8 is a top view of the fixed scroll 10a of fig. 2, but in fig. 8, an orbiting scroll blade 220a of an orbiting scroll 20a is additionally shown in a dotted line for understanding the contents of the present embodiment. As shown, on the stationary scroll blade top surface 1203a, the pre-cut portion Da1 of the stationary scroll tip 121a extends from the leading edge (not numbered) of the stationary scroll tip 121a to a contact point where the stationary scroll tip 121a and the orbiting scroll tip 221a contact each other during the discharge phase of the compressor 9. Specifically, during the exhaust phase of the compressor 9, the leading edge of the fixed scroll tip portion 121a contacts the orbiting scroll blade inner surface 2201a of the orbiting scroll tip portion 221a (i.e., the inner surface of the orbiting scroll tip portion 221 a) at the contact point P1, the leading edge of the orbiting scroll tip portion 221a contacts the fixed scroll blade inner surface 1201a of the fixed scroll tip portion 121a (i.e., the inner surface of the fixed scroll tip portion 121 a) at the contact point P2, and the pre-cut portion Da1 of the fixed scroll tip portion 121a extends from the leading edge of the fixed scroll tip portion 121a to the contact point P2 where the orbiting scroll tip portion 221a and the fixed scroll tip portion 121a contact each other.

Referring to fig. 7, another pre-cut portion Da2 is located on orbiting scroll blade top surface 2203a (i.e., the top surface of orbiting scroll tip portion 221 a) at orbiting scroll tip portion 221a of orbiting scroll blade 220a, so that orbiting scroll tip portion 221a is stepped from a side view.

In the present embodiment, the axial depth of the pre-cut portion Da2 on the orbiting scroll tip 221a is substantially proportional to the thermal expansion deformation amount in the height direction of the orbiting scroll tip 221a after being heated, but the axial depth of the pre-cut portion Da2 on the orbiting scroll tip 221a is not determined according to the actual thermal expansion deformation amount, and the pre-cut portion Da2 on the orbiting scroll tip 221a is determined according to the actual thermal expansion deformation amount, though the axial depth is not determined according to the actual thermal expansion deformation amount, the thermal expansion coefficient of the material of the orbiting scroll 20a is α o, the orbiting scroll 20a has an orbiting scroll height Lo, and the temperature rise of the internal environment of the scroll structure 1a (or the compression chamber S surrounded between the fixed scroll 10a and the orbiting scroll 20 a) after the scroll structure 1a is stationary to operating for the predetermined time is Δ T.

It should be noted that the aforementioned thermal expansion coefficient α o may be different according to the material of orbiting scroll 20a, and the present invention is not limited thereto, and the orbiting scroll height Lo refers to the maximum axial distance between the orbiting scroll blade top surface 2203a of orbiting scroll blade 220a and the orbiting scroll base inner surface 2101a of orbiting scroll base 210a, that is, the axial distance between the orbiting scroll blade top surface 2203a of orbiting scroll blade 220a having pre-cut portion Da2 and the orbiting scroll base inner surface 2101a of orbiting scroll base 210a, and the temperature rise Δ T and the required predetermined time are the same as described above, as long as the axial depth of pre-cut portion Da2 is suitable, which is not limited thereto.

On the other hand, as seen from fig. 8, on the orbiting scroll blade top surface 2203a, the pre-cut portion Da2 of the orbiting scroll tip portion 221a extends from the leading edge (not numbered) of the orbiting scroll tip portion 221a to the contact point P1 where the fixed scroll tip portion 121a and the orbiting scroll tip portion 221a contact each other at the discharge stage of the compressor 9.

In short, pre-cut portions Da1 and Da2 are designed on orbiting scroll blade top surface 2203a of fixed scroll blade top surface 1203a and orbiting scroll blade top surface 221a of central region C1 at fixed scroll tip 121a and orbiting scroll tip 221a, respectively, that is, at least one of pre-cut portions Da1 and Da2 is designed in central region C1 and adjacent surfaces of fixed scroll 10a and orbiting scroll 20a are determined by deformation amounts of thermal expansion of fixed scroll tip 121a and orbiting scroll tip 221a at operating temperature (i.e., substantially proportional to Lf × 25 Lf × Δ T and Lo × α o × Δ T, respectively), so when the internal environment (i.e., compression chamber S) reaches operating temperature due to the start of subsequent operation, the fixed blade 121a of fixed scroll 120a is deformed due to high temperature, but has pre-cut portions Da 42 o × Δ T thereon, even when the internal environment (i.e., compression chamber S) reaches operating temperature of the compressor has reached to the operating temperature, the pre-cut portions Da may not interfere with the orbiting scroll blade top surface of fixed scroll blade top surface 120a, thereby helping to compensate for the problem of thermal expansion of the orbiting scroll blade top surface of the orbiting scroll 120a and orbiting scroll blade top surface of the orbiting scroll 20a, and orbiting scroll blade top surface of the orbiting scroll blade, thereby generating high temperature, and high temperature, high temperature difference between the high temperature of the orbiting scroll blade, which may be generated by the pre-cut portions Da 1104 a, and the pre-cut portions Da 1104, and the problem caused by the interference of the high temperature of the pre-cut portions Da, and the high temperature of the orbiting scroll blade, and the high temperature of the orbiting scroll blades 120a, and the high temperature of the orbiting scroll blades may be generated by the pre-cut portions Da, and the high temperature of the orbiting scroll blades 120a, and the orbiting scroll blades, and the high temperature of the orbiting scroll blades.

Next, other embodiments will be described in which the pre-cut part is located in a different position. It should be noted that the main difference between the following embodiments and the foregoing embodiments is the position of the precut portion, and therefore, the descriptions of the similar parts are omitted.

For example, referring to fig. 9 to 11, fig. 9 is a side sectional partially enlarged view illustrating a scroll structure according to a second embodiment of the present invention, fig. 10 is a front view of a fixed scroll of fig. 9, and fig. 11 is a front view of an orbiting scroll of fig. 9.

As shown, the fixed wrap root 111b of the fixed wrap 10b and the orbiting wrap root 211b of the orbiting wrap 20b have pre-cut portions Db1 and Db2, respectively, but the fixed wrap tip 121b of the fixed wrap 10b and the orbiting wrap tip 221b of the orbiting wrap 20b do not have the pre-cut portions.

Similarly, pre-cut portions Db1 and Db2 on the fixed scroll base 111b of the fixed scroll 10b and the orbiting scroll base 211b of the orbiting scroll 20b are located in a central region C2 surrounded by the fixed scroll base outer surface 1102b of the fixed scroll base 110b, the fixed scroll blade outer surface 1202b at the fixed scroll tip portion 121b (i.e., the outer surface of the fixed scroll tip portion 121 b), the orbiting scroll blade outer surface 2202b at the orbiting scroll tip portion 221b (i.e., the outer surface of the orbiting scroll tip portion 221 b), and the orbiting scroll base outer surface 2102b of the orbiting scroll base 210b, and the fluid discharge port 1104 is also located in the central region C2.

The axial depth of the pre-cut portion Db1 on the fixed scroll base 111b of the fixed scroll 10b is determined by the thermal expansion deformation amount of the orbiting scroll tip portion 221b heated to the operating temperature (i.e. substantially proportional to Lo × α o × Δ T), and when the extension range of the fixed scroll base inner surface 1101b of the fixed scroll base 110b is substantially proportional to the contact of the fixed scroll tip portion 121b and the orbiting scroll tip portion 221b with their respective leading edges at the compressor discharge stage, the projection range of the region surrounded by the fixed scroll blade inner surface 1201b at the fixed scroll tip portion 121b (i.e. the inner surface of the fixed scroll tip portion 121 b) and the orbiting scroll blade outer surface 2202b at the orbiting scroll tip portion 221b (i.e. the outer surface of the orbiting scroll tip portion 221 b) is projected on the fixed scroll base 1101b of the fixed scroll base 110b, so that the pre-cut portion Db1 can surround the fluid outlet 1104.

On the other hand, the axial depth of pre-cut portion Db2 on orbiting scroll base 211b of orbiting scroll 20b is determined by the amount of thermal expansion deformation of fixed scroll tip 121b heated to the operating temperature (i.e. substantially proportional to Lf × α f × Δ T), and when the extension range of orbiting scroll base inner surface 2101b of orbiting scroll base 210b is substantially proportional to the contact of fixed scroll tip 121b and orbiting scroll tip 221b with their respective leading edges at the compressor discharge stage, the projection range of the area surrounded by orbiting scroll blade inner surface 2201b (i.e. inner surface of orbiting scroll tip 221 b) at orbiting scroll tip 221b and fixed scroll blade outer surface 1202b (i.e. outer surface of fixed scroll 121 b) at fixed scroll tip 121b is projected onto orbiting scroll base inner surface 2101b of orbiting scroll base 210b is overlapped with the projection range of fixed scroll base inner surface 220110 b of fixed scroll base 110b of orbiting scroll base 210 b. it can be understood that the projection range of pre-cut portion Db on orbiting scroll base 211b of orbiting scroll base 211b overlaps with the projection range of fixed scroll base 111b at least 10 b.

Therefore, pre-cut portions Db1 and Db2 designed on fixed scroll root 111b of fixed scroll 10b and orbiting scroll root 211b of orbiting scroll 20b in central region C2, respectively, and axial depths of pre-cut portions Db1 and Db2 are determined by thermal expansion deformation amounts of orbiting scroll blade 220b and fixed scroll blade 120b heated to operating temperature (i.e. substantially proportional to Lo × α × Δ T and Lf × α f × Δ T, respectively), so that when the compressor starts to operate to raise the internal environment to operating temperature, the fixed scroll tip 121b of fixed scroll blade 120b is deformed due to high temperature, but since orbiting scroll root 211b of orbiting scroll 20b has pre-cut portion Db 4, the fixed scroll 121b is not interfered with orbiting scroll 20b, friction and the like, even if the fixed scroll blade 121b interferes with orbiting scroll 20b, the pre-cut portion Db 211b has high temperature, the problem of pre-cut portion Db is avoided, and the problem of fluid expansion deformation is more generated by the high temperature of orbiting scroll blade 120b and orbiting scroll blade 120b, thus it is more favorable to avoid the problem of generating interference between the high temperature of the thermal expansion of fluid generated by the pre-cut portion dpb and orbiting scroll blade 120b, especially when the rotating around stationary scroll blade 120b comes close to the high temperature of orbiting scroll outlet port 1104, especially, and fixed scroll 20b, especially, the problem of fixed scroll 120b, especially high temperature compensation fluid generated by the high temperature of orbiting scroll 120b, especially by interference of the interference of fixed scroll 120b, especially high temperature compensation fluid generated by interference between the high temperature generated by interference of fixed scroll 120b, especially, and fixed scroll blade 120b, which is avoided by interference between fixed scroll blade 120b, especially high temperature interference between the high temperature interference between fixed scroll blade 120b, and fixed scroll blade 1104, and fixed scroll blade.

For another example, please refer to fig. 12, which is a schematic side sectional view showing a part of a scroll structure according to a third embodiment of the present invention. As shown, the fixed wrap tip portion 121c of the fixed wrap 10c, the fixed wrap root portion 111c of the fixed wrap 10c, the orbiting wrap tip portion 221c of the orbiting wrap 20c, and the orbiting wrap root portion 211c of the orbiting wrap 20c have pre-cut portions Dc1, Dc2, Dc3, and Dc4, respectively.

Similarly, the pre-cut portions dcd 1, dcd 2, Dc3 and Dc4 are all located in a central region C3 surrounded by the fixed scroll base outer surface 1102C of the fixed scroll base 110C, the fixed scroll blade outer surface 1202C (i.e., the outer surface of the fixed scroll tip 121C) at the fixed scroll tip 121C, the orbiting scroll blade outer surface 2202C (i.e., the outer surface of the orbiting scroll tip 221C) at the orbiting scroll base 210C, and the orbiting scroll base outer surface 2102C of the orbiting scroll base 210C, and the fluid discharge port 1104 is also located in the central region C3. furthermore, the pre-cut portions dcc 1, Dc2, Dc 84 and dcc 42 on the fixed scroll tip 121C, the fixed scroll root 111C, the orbiting scroll tip 221C and the orbiting scroll root 211C can be obtained by referring to the above-mentioned embodiments, as long as the pre-cut portions dcc 27, Dc2, Dc 84 and dcc 42 are determined by the pre-cut portions dcd 27, respectively corresponding to the pre-expansion depth of the pre-cut portions dcd 465, which are substantially proportional to the thermal expansion temperature of the axial direction of the fixed scroll base 34C, the pre-cut portion dco, the axial direction of the fixed scroll base 110C, the pre-cut portion dcd 12C, the pre-cut portion 221C is determined by the pre-expansion depth, the axial thermal expansion depth of the pre-cut portion corresponding to the axial thermal expansion of the axial expansion of the fixed scroll base 24, the pre-cut portion, the axial thermal expansion of the fixed scroll base 24, the pre-cut portion, the axial length 4635, the pre-cut portion of the pre-cut portion, the axial thermal expansion of the fixed scroll base 24, the pre-cut portion, the pre.

It can be understood from the embodiments described above that, in the present embodiment, when the compressor starts to operate subsequently, the precut portions Dc1, Dc2, Dc3 and Dc4 can also be used to compensate the thermal expansion deformation of the fixed scroll tip 121c and the orbiting scroll tip 221c of the fixed scroll 10c and the orbiting scroll 20c near the fluid discharge port due to high temperature, so as to avoid the problem of mutual interference and friction between the fixed scroll 10c and the orbiting scroll 20c, thereby helping to maintain the characteristics of low noise and high operating efficiency.

That is, it is within the scope of the present invention that the pre-cut portion is designed in the central area defined by the fixed wrap and the orbiting wrap to help achieve or alleviate the problems of frictional heat and frictional noise caused by thermal deformation due to temperature rise between the fixed wrap and the orbiting wrap. In the following, a plurality of embodiments will be described, but it should be noted that the precut portions mentioned in the following embodiments are also located in the central area as described in the previous embodiments, and for the sake of simplicity of the drawings, the central area will not be shown in the following drawings.

For example, as shown in fig. 13, a schematic side-cut partially enlarged view of a scroll structure according to a fourth embodiment of the present invention, in the present embodiment, pre-cut portions Dd1, Dd2 and Dd3 are respectively disposed on a tip portion 121d of the fixed scroll, a root portion 111d of the fixed scroll 10d and a tip portion 221d of the orbiting scroll 20d, but the root portion 211d of the orbiting scroll 20d does not have a pre-cut portion.

For example, please refer to fig. 14, which is a schematic side-sectional partially enlarged view of a scroll structure according to a fifth embodiment of the present invention, in the present embodiment, the fixed scroll tip 121e of the fixed scroll 10e and the orbiting scroll tip 221e and orbiting scroll root 211e of the orbiting scroll 20e are respectively provided with pre-cut portions De1, De2 and De3, and the fixed scroll root 111e of the fixed scroll 10e does not have a pre-cut portion, similarly, in the present embodiment, the extension ranges of the pre-cut portions De1, De2 and De3 at each portion are the same as those described in the previous embodiment, which can be obtained by referring to the rules of the previous embodiment, and it is understood that, in the axial direction, the total axial depth of the pre-cut portion De1 on the fixed scroll tip 121e and the pre-cut portion De3 on the orbiting scroll root 211e is substantially proportional to Lf × α f × Δ T, and the axial depth of the pre-cut portion De 35 2 × 8684 on the orbiting scroll root 211e is substantially proportional to Lo Δ α.

For example, please refer to fig. 15, which is a schematic side-sectional partially enlarged view of a scroll structure according to a sixth embodiment of the present invention, in the present embodiment, the fixed scroll tip 121f and the fixed scroll root 111f of the fixed scroll 10f and the orbiting scroll root 211f of the orbiting scroll 20f are respectively provided with pre-cut portions Df1, Df2 and Df3, and the orbiting scroll tip 221f of the orbiting scroll 20f does not have a pre-cut portion, similarly, in the present embodiment, the extension ranges of the pre-cut portions Df 7, Df2 and Df3 on the respective portions are the same as those described in the previous embodiment, which can be obtained by referring to the rules of the previous embodiment, and it is not described herein again.

For example, referring to fig. 16, a schematic side-cut partially enlarged view of a scroll structure according to a seventh embodiment of the present invention is shown, in the present embodiment, a fixed scroll root 111g of the fixed scroll 10g and an orbiting scroll tip 221g and an orbiting scroll root 211g of the orbiting scroll 20g are respectively provided with pre-cut portions Dg1, Dg2 and Dg3, and the fixed scroll tip 121g of the fixed scroll 10g has no pre-cut portion.

In addition, the pre-cut part may be designed on only one of the fixed scroll and the orbiting scroll, which is helpful to reduce the problems of friction noise and high temperature caused by high temperature thermal deformation between the fixed scroll and the orbiting scroll. For example, as shown in fig. 17, which is a schematic side-sectional partially enlarged view of a scroll structure according to an eighth embodiment of the present invention, in this embodiment, only the fixed scroll tip 121h and the fixed scroll root 111f of the fixed scroll 10h are respectively provided with the pre-cut portions Dh1 and Dh2, and the pre-cut portions Dh1 and Dh2 can avoid the problem that the fixed scroll 10h is interfered and rubbed with the orbiting scroll 20h due to high-temperature expansion at the position close to the fluid discharge port 1104. That is, although only one of the fixed wrap and the orbiting wrap has the pre-cut portion, it is still helpful to alleviate the problems of friction noise and high temperature generated by high temperature thermal deformation between the fixed wrap and the orbiting wrap. However, this embodiment is only an example, and in other embodiments, the pre-cut portion may be designed only on the orbiting scroll, and the invention is not limited thereto.

For example, in other embodiments, the pre-cut portion may be selectively designed only on one of the tip portion of the orbiting scroll, the root portion of the orbiting scroll, the tip portion of the fixed scroll, and the root portion of the fixed scroll, so as to alleviate the aforementioned problems of the fixed scroll and the orbiting scroll. For example, fig. 18 is a partially enlarged side sectional view of a scroll structure according to a ninth embodiment of the present invention. In this embodiment, the fixed scroll 10i has the pre-cut portion Di1 only on the fixed scroll tip 121i, but it can still alleviate the problems of friction noise and high temperature between the fixed scroll and the orbiting scroll due to high temperature thermal deformation.

Finally, it should be noted that, although the pre-cutting portion is designed on the top surface of the fixed scroll tip and/or the orbiting scroll tip in the above-mentioned embodiment, the pre-cutting portion is distributed over the whole top surface of the fixed scroll tip and/or the orbiting scroll tip, but the invention is not limited thereto. For example, fig. 19 is a partially enlarged schematic view of a fixed scroll according to a tenth embodiment of the present invention. In this embodiment, the fixed scroll 10j has the pre-cut part Dj1 only on the fixed scroll tip 121j, but unlike the previous embodiment, the pre-cut part Dj1 is not completely distributed over the top of the fixed scroll tip 121j, but a part of the fixed scroll tip 121j is not pre-cut. However, it can be understood that, since the fixed scroll tip 121j of the present embodiment still has the pre-cut portion Dj1 with a certain ratio, it is still helpful to alleviate the problems of friction noise and high temperature caused by high temperature thermal deformation between the fixed scroll and the orbiting scroll.

By the scroll structure of the invention, because at least one precut part is positioned in the central area surrounded by the outer surfaces of the structures such as the fixed scroll base, the fixed scroll tip part, the orbiting scroll base, the orbiting scroll tip part and the like, and the pre-cut part is positioned on at least one of the adjacent surfaces of the fixed scroll and the orbiting scroll, that is, the pre-cutting part is designed in the region with higher internal temperature when the compressor is running, thus being helpful to avoid the problems of interference and friction when the fixed scroll tip and the orbiting scroll tip are thermally expanded due to high temperature of running, thereby avoiding the problems of noise and temperature rise caused by friction between the fixed scroll and the orbiting scroll and the problems of noise and temperature rise caused by friction between the fixed scroll and the orbiting scroll, thereby helping to maintain the characteristics of low noise and high operating efficiency of the scroll structure and prolonging the service life.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A scroll structure of a compressor, comprising:

a fixed scroll including a fixed scroll base and a fixed scroll blade erected on the fixed scroll base, wherein the fixed scroll base has a fluid discharge port; and

an orbiting scroll including an orbiting scroll base and an orbiting scroll blade erected on the orbiting scroll base, the orbiting scroll being rotatable with respect to the fixed scroll;

the scroll structure has at least one precut part, and defines that when a fixed scroll tip part of the fixed scroll blade and an orbiting scroll tip part of the orbiting scroll blade are contacted with each other in the exhaust stage of the compressor, a central area is surrounded by the outer surface of the fixed scroll tip part, the outer surface of the orbiting scroll tip part, the outer surface of the fixed scroll base and the outer surface of the orbiting scroll base together, wherein the fluid discharge port is located in the central area, and the precut part is located in the central area and located on at least one of the adjacent surfaces of the fixed scroll and the orbiting scroll.

2. The scroll structure of claim 1, wherein the at least one pre-cut portion is located on at least one of a top surface of the stationary scroll tip and a top surface of the orbiting scroll tip.

3. The scroll structure of claim 2, wherein the at least one pre-cut portion on the top surface of the fixed scroll tip extends from a leading edge of the fixed scroll tip to a contact point where the fixed scroll tip and the orbiting scroll tip contact each other during the compressor discharge phase.

4. The scroll structure of claim 3, wherein the coefficient of thermal expansion of the material of the fixed scroll is α f, a fixed scroll height of the fixed scroll is Lf, a temperature rise of an internal environment of the scroll structure after the scroll structure is at a predetermined time from rest to operation is Δ T, and an axial depth of the at least one pre-cut portion on the tip portion of the fixed scroll is substantially proportional to Lf x α f x Δ T.

5. The scroll structure of claim 2, wherein the at least one pre-cut portion on the top surface of the orbiting scroll tip extends from a leading edge of the orbiting scroll tip to a contact point where the fixed scroll tip and the orbiting scroll tip contact each other during the compressor discharge phase.

6. The scroll structure of claim 5, wherein the coefficient of thermal expansion of the material of the orbiting scroll is α °, an orbiting scroll height of the orbiting scroll is Lo, a temperature rise of an internal environment of the scroll structure after the scroll structure is at rest and operates for a predetermined time is Δ T, and an axial depth of the at least one pre-cut portion at a tip end of the orbiting scroll is substantially proportional to Lo x α o x Δ T.

7. The scroll structure of claim 1, wherein the at least one pre-cut portion is located on at least one of a fixed scroll root of the fixed scroll and an orbiting scroll root of the orbiting scroll.

8. The scroll structure of claim 7, wherein the fixed scroll base has a fixed scroll base inner surface facing the orbiting scroll, the at least one pre-cut portion on the fixed scroll base root of the fixed scroll is located on the fixed scroll base inner surface, and an extent of the at least one pre-cut portion on the fixed scroll base inner surface is substantially proportional to a projection extent of an area surrounded by the fixed scroll tip inner surface and the orbiting scroll tip outer surface on the fixed scroll base inner surface when a leading edge of the fixed scroll tip and a leading edge of the orbiting scroll tip contact each other at the compressor discharge stage.

9. The scroll structure of claim 8, wherein the coefficient of thermal expansion of the material of the orbiting scroll is α °, an orbiting scroll height of the orbiting scroll is Lo, a temperature rise of an internal environment of the scroll structure after the scroll structure is stationary to operate for a predetermined time is Δ T, and an axial depth of the at least one pre-cut portion on the root of the fixed scroll is substantially proportional to Lo x α o x Δ T.

10. The scroll structure of claim 7, wherein the orbiting scroll base has an orbiting scroll base inner surface facing the fixed scroll, the at least one pre-cut portion on the orbiting scroll base root of the orbiting scroll is located on the orbiting scroll base inner surface, and an extent of the at least one pre-cut portion on the orbiting scroll base inner surface is substantially proportional to a projection extent of an area surrounded by the inner surface of the orbiting scroll tip and the outer surface of the fixed scroll tip on the orbiting scroll base inner surface when the leading edge of the fixed scroll tip and the leading edge of the orbiting scroll tip are in contact with each other at the compressor discharge stage.

11. The scroll structure of claim 10, wherein the coefficient of thermal expansion of the material of the fixed scroll is α f, a fixed scroll height of the fixed scroll is Lf, a temperature rise of an internal environment of the scroll structure after the scroll structure is stationary and operates for a predetermined time is Δ T, and an axial depth of the at least one pre-cut portion on the orbiting scroll root of the orbiting scroll is substantially proportional to Lf x α f x Δ T.

12. The scroll structure of claim 1, wherein the at least one pre-cut portion is plural in number and is respectively located on a top surface of the stationary scroll tip and a top surface of the orbiting scroll tip.

13. The scroll structure of claim 1, wherein the at least one pre-cut portion is plural in number and located at a fixed scroll root of the fixed scroll and an orbiting scroll root of the orbiting scroll, respectively.

14. The scroll structure of claim 1, wherein the at least one pre-cut portion is plural in number and is respectively located at one of a top surface of the tip portion of the fixed scroll and a wrap root portion of the orbiting scroll and at a top surface of the tip portion of the orbiting scroll and a wrap root portion of the fixed scroll.

15. The scroll structure of claim 1, wherein the at least one pre-cut portion is plural in number and is respectively located at one of a top surface of the orbiting scroll tip and a fixed scroll root of the fixed scroll and at a top surface of the fixed scroll tip and an orbiting scroll root of the orbiting scroll.

16. The scroll structure of claim 1, wherein the at least one pre-cut portion is plural in number and located at a fixed scroll root of the fixed scroll, a top surface of the fixed scroll tip, a top surface of the orbiting scroll tip, and an orbiting scroll root of the orbiting scroll, respectively.