Compression mechanism and compressor

Abstract

The application relates to the technical field of compressors, in particular to a compression mechanism and a compressor, the compression mechanism comprising a moving scroll and a fixed scroll, moving disc scroll teeth of the moving scroll, the profile line of the moving disc scroll teeth comprising a first inner side profile line and a first outer side profile line; fixed disc scroll teeth of the fixed scroll, the profile line of the fixed disc scroll teeth comprising a second inner side profile line, a second outer side profile line and an inner side profile line extension line, when the moving scroll moves to a first position, the end of the first inner side profile line is engaged with the second outer side profile line, and the moving disc scroll teeth and the fixed disc scroll teeth enclose a first air suction cavity; when the moving scroll moves to a second position, the end of the first outer side profile line is engaged with the other end of the inner side profile line extension line, and the moving disc scroll teeth and the fixed disc scroll teeth enclose a second air suction cavity. Through the above mode, the compression mechanism provided by the application can increase the displacement of the compression mechanism, and meet the demand of the compression mechanism for light weight and miniaturization.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a compression mechanism and a compressor. BACKGROUND

[0002] The compression mechanism of the scroll compressor is composed of a moving scroll and a fixed scroll, the moving scroll is provided with moving scroll teeth, and the fixed scroll is provided with fixed scroll teeth, the profile of the moving scroll teeth and the profile of the fixed scroll teeth are the same in parameters, the phase difference is 180°, and the centers of the base circles are apart by r (r is the crank radius), when the moving scroll and the fixed scroll move relative to each other, the moving scroll teeth and the fixed scroll teeth cooperate to form a closed crescent-shaped volume cavity, and the volume of the volume cavity changes, thereby realizing the compression of gas. Figure 1 The present application relates to the technical field of compressors, in particular to a compression mechanism and a compressor.

[0003] The fixed scroll further includes a line segment 213' extending from the second inner side profile line 211' of the fixed scroll tooth to beyond the tail end of the moving scroll tooth, the line segment 213' and the second outer side profile line 212' of the fixed scroll tooth and the arc line 214' form an outer contour line of the gas supply groove, the bottom of the gas supply groove near the arc line 214' is provided with an air inlet hole for introducing gas into the gas supply groove. Since the line segment 213' does not mesh with any point of the moving scroll during the entire compression process, it cannot form a compression cavity participating in compression, so the line segment 213' is an invalid line segment, resulting in structural waste. SUMMARY

[0004] In view of the above problems, the present application provides a compression mechanism and a compressor, which overcomes the above problems or at least partially solves the above problems.

[0005] To solve the above technical problems, one technical scheme adopted by the present application is to provide a compression mechanism, comprising: a movable scroll and a fixed scroll, the movable scroll is provided with movable scroll teeth, the profile of the movable scroll teeth comprises a first inner side profile and a first outer side profile; the fixed scroll is provided with fixed scroll teeth, the profile of the fixed scroll teeth comprises a second inner side profile, a second outer side profile and an inner side profile extension line, one end of the inner side profile extension line is connected with the end of the second inner side profile, the movable scroll teeth and the fixed scroll teeth are sleeved, the movable scroll can do circumferential translation relative to the fixed scroll; when the movable scroll moves to a first position, the end of the first inner side profile is engaged with the second outer side profile, the movable scroll teeth and the fixed scroll teeth form a first suction cavity; when the movable scroll moves to a second position, the end of the first outer side profile is engaged with the other end of the inner side profile extension line, the movable scroll teeth and the fixed scroll teeth form a second suction cavity.

[0006] Optionally, the movable scroll comprises a disc body and the movable scroll teeth, the movable scroll teeth are arranged on the end face of the disc body, the center of the base circle of the profile of the movable scroll teeth deviates from the geometric center of the disc body along a first direction; wherein the first direction is the direction in which the center of the base circle of the profile of the movable scroll teeth deviates from the tail end of the movable scroll teeth.

[0007] Optionally, the offset distance L of the center of the base circle of the profile of the movable scroll teeth is 1.0 mm±0.5 mm.

[0008] Optionally, the included angle β between the first direction and a reference line satisfies: 0°≤β≤20°, wherein the reference line is a straight line tangent to the end of the movable scroll teeth and intersecting the geometric center of the movable scroll.

[0009] Optionally, the area of the second suction cavity is greater than the area of the first suction cavity.

[0010] Optionally, the side wall of the fixed scroll teeth forms a compression groove, the groove bottom of one end of the compression groove away from the geometric center of the fixed scroll is provided with an air inlet hole, the groove bottom of one end of the compression groove close to the geometric center of the fixed scroll is provided with an air outlet hole, and the air inlet hole and the air outlet hole both penetrate through the groove bottom of the compression groove.

[0011] Optionally, the end face of the disc body away from the movable scroll teeth is provided with a balance groove.

[0012] Optionally, the shape of the disc body is disc-shaped, and an annular groove is arranged around the outer wall of the disc body.

[0013] Optionally, the side of the fixed scroll towards the movable scroll is provided with an oil guide groove.

[0014] To solve the above technical problems, the application adopts another technical solution: providing a compressor comprising the compression mechanism.

[0015] The beneficial effects of the embodiment of the application are: different from the prior art, the compression mechanism provided by the embodiment of the application comprises a moving scroll and a fixed scroll, the moving scroll is provided with moving scroll teeth, and the profile of the moving scroll teeth comprises a first inner side profile and a first outer side profile; the fixed scroll is provided with fixed scroll teeth, and the profile of the fixed scroll teeth comprises a second inner side profile, a second outer side profile and an inner side profile extension line, one end of the inner side profile extension line is connected with the end of the second inner side profile, the moving scroll teeth and the fixed scroll teeth are sleeved, and the moving scroll can make circumferential translation relative to the fixed scroll; when the moving scroll moves to a first position, the end of the first inner side profile is engaged with the second outer side profile, and the moving scroll teeth and the fixed scroll teeth form a first suction cavity; when the moving scroll moves to a second position, the end of the first outer side profile is engaged with the other end of the inner side profile extension line, and the moving scroll teeth and the fixed scroll teeth form a second suction cavity. Since the second suction cavity formed by the engagement of the end of the first outer side profile and the inner side profile extension line has a larger volume than the first suction cavity, compared with the traditional compression mechanism, the volume of the outermost compression cavity composed of the first suction cavity and the second suction cavity is larger, and thus the displacement of the compression mechanism is larger. In this way, the compression mechanism provided by the embodiment can increase the displacement of the compression mechanism while meeting the requirements of lightweight and miniaturization of the compression mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings required to be used in the embodiments of the application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the application, and other drawings can be obtained by the drawings without creative labor for those skilled in the art.

[0017] Figure 1 is a schematic view of the engagement of the moving scroll teeth and the fixed scroll teeth of the traditional compression mechanism;

[0018] Figure 2 is an exploded view of a compression mechanism provided by the embodiment of the application;

[0019] Figure 3 is another exploded view of a compression mechanism provided by the embodiment of the application;

[0020] Figure 4is a relative state diagram between the dynamic scroll and the fixed scroll when the angle of the circular translation is 0 degree, when the dynamic scroll of the compression mechanism provided by the embodiment of the present application makes a circular translation relative to the fixed scroll;

[0021] Figure 5 is a relative state diagram between the dynamic scroll and the fixed scroll when the angle of the circular translation is 90 degree, when the dynamic scroll of the compression mechanism provided by the embodiment of the present application makes a circular translation relative to the fixed scroll;

[0022] Figure 6 is a relative state diagram between the dynamic scroll and the fixed scroll when the angle of the circular translation is 180 degree, when the dynamic scroll of the compression mechanism provided by the embodiment of the present application makes a circular translation relative to the fixed scroll;

[0023] Figure 7 is a relative state diagram between the dynamic scroll and the fixed scroll when the angle of the circular translation is 270 degree, when the dynamic scroll of the compression mechanism provided by the embodiment of the present application makes a circular translation relative to the fixed scroll;

[0024] Figure 8 is a diagram showing that the dynamic scroll of the compression mechanism provided by the embodiment of the present application is offset relative to the traditional dynamic scroll in the first direction. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intervening elements can be present therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or one or more intervening elements can be present therebetween. The terms "vertical", "horizontal", "left", "right", and similar expressions used in the present specification are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used in the present specification are the same as those commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the present specification includes any and all combinations of one or more of the related listed items.

[0027] Please refer to Figure 1, the traditional compression mechanism 1000', the orbiting scroll 11' only includes the first inner side profile 111' and the first outer side profile 112', the fixed scroll 21' only includes the second inner side profile 211' and the second outer side profile 212', therefore, the traditional compression mechanism 1000', when the angle of the circumferential translation of the orbiting scroll 1' is 0 degree, the end of the first inner side profile 111' meshes with the second outer side profile 212' to form a third suction cavity S11, the end of the second inner side profile 211' meshes with the first outer side profile 112' to form a fourth suction cavity S21, the orbiting scroll 11' and the fixed scroll 21' form the symmetrical third suction cavity S11 and the fourth suction cavity S21 at the same time, the volume of the third suction cavity S11 and the fourth suction cavity S21 are both equal to the volume of the first suction cavity S1, the fixed scroll 21' further includes a line segment 213' extended from the second inner side profile 211', the line segment 213' is used to form the outer contour line of the gas supply groove together with the second outer side profile 212' and the arc line 214' of the fixed scroll 21', since the gas needs to enter the first suction cavity S1 and the second suction cavity S2 through the suction port, the line segment 213' needs to pass the end of the orbiting scroll 11'. In order to increase the displacement of the compression mechanism 1000', the common method is to increase the length of the profile of the orbiting scroll 11' and the length of the profile of the fixed scroll 21', in this way, the displacement of the compression mechanism 1000' is increased, at the same time, the volume and the weight of the compression mechanism 1000' are also greatly increased. Based on this, in order to increase the displacement of the compression mechanism 1000' while meeting the requirements of light weight and small size of the compression mechanism 1000', the application provides a compression mechanism 1000, the structure and principle of the compression mechanism 1000 will be described in detail below.

[0028] Please refer to Figure 2 and Figure 3 , the compression mechanism 1000 includes an orbiting scroll 1 and a fixed scroll 2, the orbiting scroll 1 is provided with an orbiting scroll 11, the fixed scroll 2 is provided with a fixed scroll 21, the orbiting scroll 11 is sleeved with the fixed scroll 21, the orbiting scroll 1 can do circumferential translation relative to the fixed scroll 2, during the relative motion of the orbiting scroll 1 and the fixed scroll 2, the volume of the closed crescent-shaped volume cavity formed by the meshing of the orbiting scroll 11 and the fixed scroll 21 is constantly reduced, so as to realize the compression of the gas in the volume cavity.

[0029] For the above-mentioned orbiting scroll 1, in the embodiment, please refer to Figure 2 and Figure 4The orbiting scroll 1 comprises a disc body 12, an orbiting scroll tooth 11 arranged on an end face of one end of the disc body 12, and a mounting seat 13 arranged on an end face of the other end of the disc body 12, the mounting seat 13 being used for connecting with a driving mechanism of the compression mechanism 1000. The profile of the orbiting scroll tooth 11 comprises a first inner side profile 111 and a first outer side profile 112. The first inner side profile 111 and the first outer side profile 112 are respectively part line segments of two involute curves generated on the same base circle a, and the distance between the first inner side profile 111 and the first outer side profile 112 is equal to the distance between a second inner side profile 211 and a second outer side profile 212.

[0030] For the above fixed scroll 2, in the present embodiment, referring to Figure 3 , Figure 4 and Figure 6 , the side wall of the fixed scroll tooth 21 encloses a scroll-shaped compression groove 22 for inserting the orbiting scroll tooth 11, and the groove bottom of the compression groove 22 is further provided with an air inlet hole 221 and an air outlet hole 222, the air inlet hole 221 is located at the groove bottom of the tail end of the compression groove 22, and the air outlet hole 222 is located at the groove bottom of the starting end of the compression groove 22. When the compression mechanism 1000 works, the ambient gas is sucked into the compression groove 22 through the air inlet hole 221, and the compressed gas is finally discharged out of the compression mechanism 1000 through the air outlet hole 222 when the orbiting scroll 1 completes one circumferential translation. The profile of the fixed scroll tooth 21 comprises the second inner side profile 211, the second outer side profile 212, and an inner side profile extension line 213. The second inner side profile 211 and the second outer side profile 212 are respectively part line segments of two involute curves generated on the same base circle b. The length of the second inner side profile 211 is the same as that of the first inner side profile 111, and the base circle b is the same in size as the base circle a. When the orbiting scroll 1 is sleeved on the fixed scroll 2, the orbiting scroll tooth and the fixed scroll tooth are oppositely engaged after being staggered by 180°. The inner side profile extension line 213 is an extension line of the second inner side profile 211, and extends from the end point B of the second inner side profile 211 to point A, and the inner side profile extension line 213 is located on the involute curve of the second inner side profile 211. The inner side profile extension line 213 is used for engaging with the end of the first outer side profile 112, so as to make the orbiting scroll tooth 11 and the fixed scroll tooth 21 enclose a first suction cavity S1. The spread angle of the A point of the inner side profile 211 should be greater than or equal to the spread angle of the engagement point of the inner side profile extension line 213 and the end of the first outer side profile 112, so that the inner side profile extension line 213 has sufficient length for engaging with the end of the first outer side profile 112.

[0031] When the orbiting scroll 1 moves to the first position, as Figure 4As shown, the end of the first inner profile line 111 engages with the second outer profile line 212, and the orbiting scroll plate scroll teeth 11 and the fixed scroll plate scroll teeth 21 form a first suction cavity S1; when the orbiting scroll plate 1 moves to the second position, as shown in FIG. 4B, the end of the first outer profile line 112 engages with the inner profile line extension line 213 away from one end of the second inner profile line 211, and the orbiting scroll plate scroll teeth 11 and the fixed scroll plate scroll teeth 21 form a second suction cavity S2; the first suction cavity S1 and the second suction cavity S2 together form the outermost compression cavity of the compression mechanism 1000, i.e., the closed cavity where the gas sucked into the compression mechanism 1000 first enters; the combined volume of the first suction cavity S1 and the second suction cavity S2 is the suction volume, and the larger the suction volume, the larger the displacement of the compression mechanism 1000. Figure 6 As shown, the end of the first inner profile line 111 engages with the second outer profile line 212, and the orbiting scroll plate scroll teeth 11 and the fixed scroll plate scroll teeth 21 form a first suction cavity S1; when the orbiting scroll plate 1 moves to the second position, as shown in FIG. 4B, the end of the first outer profile line 112 engages with the inner profile line extension line 213 away from one end of the second inner profile line 211, and the orbiting scroll plate scroll teeth 11 and the fixed scroll plate scroll teeth 21 form a second suction cavity S2; the first suction cavity S1 and the second suction cavity S2 together form the outermost compression cavity of the compression mechanism 1000, i.e., the closed cavity where the gas sucked into the compression mechanism 1000 first enters; the combined volume of the first suction cavity S1 and the second suction cavity S2 is the suction volume, and the larger the suction volume, the larger the displacement of the compression mechanism 1000.

[0032] Figures 4-7 As shown, the end of the first inner profile line 111 engages with the second outer profile line 212, and the orbiting scroll plate scroll teeth 11 and the fixed scroll plate scroll teeth 21 form a first suction cavity S1; when the orbiting scroll plate 1 moves to the second position, as shown in FIG. 4B, the end of the first outer profile line 112 engages with the inner profile line extension line 213 away from one end of the second inner profile line 211, and the orbiting scroll scroll teeth 11 and the fixed scroll plate scroll teeth 21 form a second suction cavity S2; the first suction cavity S1 and the second suction cavity S2 together form the outermost compression cavity of the compression mechanism 1000, i.e., the closed cavity where the gas sucked into the compression mechanism 1000 first enters; the combined volume of the first suction cavity S1 and the second suction cavity S2 is the suction volume, and the larger the suction volume, the larger the displacement of the compression mechanism 1000. Figure 4 As shown, the end of the first inner profile line 111 engages with the second outer profile line 212, and the orbiting scroll plate scroll teeth 11 and the fixed scroll plate scroll teeth 21 form a first suction cavity S1; when the orbiting scroll plate 1 moves to the second position, as shown in FIG. 4B, the end of the first outer profile line 112 engages with the inner profile line extension line 213 away from one end of the second inner profile line 211, and the orbiting scroll scroll teeth 11 and the fixed scroll plate scroll teeth 21 form a second suction cavity S2; the first suction cavity S1 and the second suction cavity S2 together form the outermost compression cavity of the compression mechanism 1000, i.e., the closed cavity where the gas sucked into the compression mechanism 1000 first enters; the combined volume of the first suction cavity S1 and the second suction cavity S2 is the suction volume, and the larger the suction volume, the larger the displacement of the compression mechanism 1000. Figure 5 As shown, the end of the first inner profile line 111 engages with the second outer profile line 212, and the orbiting scroll plate scroll teeth 11 and the fixed scroll plate scroll teeth 21 form a first suction cavity S1; when the orbiting scroll plate 1 moves to the second position, as shown in FIG. 4B, the end of the first outer profile line 112 engages with the inner profile line extension line 213 away from one end of the second inner profile line 211, and the orbiting scroll scroll teeth 11 and the fixed scroll plate scroll teeth 21 form a second suction cavity S2; the first suction cavity S1 and the second suction cavity S2 together form the outermost compression cavity of the compression mechanism 1000, i.e., the closed cavity where the gas sucked into the compression mechanism 1000 first enters; the combined volume of the first suction cavity S1 and the second suction cavity S2 is the suction volume, and the larger the suction volume, the larger the displacement of the compression mechanism 1000. Figure 6 As shown, the end of the first inner profile line 111 engages with the second outer profile line 212, and the orbiting scroll plate scroll teeth 11 and the fixed scroll plate scroll teeth 21 form a first suction cavity S1; when the orbiting scroll plate 1 moves to the second position, as shown in FIG. 4B, the end of the first outer profile line 112 engages with the inner profile line extension line 213 away from one end of the second inner profile line 211, and the orbiting scroll scroll teeth 11 and the fixed scroll plate scroll teeth 21 form a second suction cavity S2; the first suction cavity S1 and the second suction cavity S2 together form the outermost compression cavity of the compression mechanism 1000, i.e., the closed cavity where the gas sucked into the compression mechanism 1000 first enters; the combined volume of the first suction cavity S1 and the second suction cavity S2 is the suction volume, and the larger the suction volume, the larger the displacement of the compression mechanism 1000. Figure 7As shown, at this time, the movable scroll 1 is in the second transition position, at this time, the first suction port X1 and the second suction port X2 are both in the open state. The above-mentioned first position, first transition position, second position and second transition position are four states of the movable scroll 1 in a circumferential translation cycle, when the movable scroll 1 continuously works, the position change of the movable scroll 1 is in turn the first position, the first position transition position, the second position, the second position transition position, and finally changes to the first position, and so on.

[0033] The compression mechanism 1000 provided by the embodiment includes the inner side profile line extension line 213 of the fixed scroll 2, the inner side profile line can form the gas groove with the arc line, and the inner side profile line is used to form the second suction cavity S2, so that the length sum of the profile lines used to form the second suction cavity S2 is greater than the length sum of the profile lines used to form the first suction cavity S1, and then the volume of the second suction cavity S2 is greater than the volume of the first suction cavity S1, the volume of the outermost compression cavity composed of the first suction cavity S1 and the second suction cavity S2 is greater than that of the conventional compression mechanism 1000', and the displacement of the compression mechanism 1000 is greater. In this way, the compression mechanism 1000 provided by the embodiment of the application makes full use of the structure of the fixed scroll 2 by arranging the inner side profile line extension line 213, and then the displacement of the compression mechanism 1000 can be increased while meeting the requirements of light weight and small size of the compression mechanism 1000.

[0034] Please refer to Figure 8, the profile of the orbiting scroll 11 should not exceed the boundary of the circle of the end surface of the disc body 12. In the current compression mechanism, the center p" of the base circle of the orbiting scroll 11" coincides with the geometric center o of the disc body, and the maximum boundary circle C is defined according to the size and structure of the orbiting scroll, the range of the orbiting scroll 11" allowed to occupy is within the maximum boundary circle C, and the part of the profile of the orbiting scroll 11" beyond the maximum boundary circle C should be removed, thereby limiting the length of the profile of the orbiting scroll 11", the profile angle of the orbiting scroll 11" is smaller, and the displacement of the compression mechanism is limited. In order to increase the displacement of the compression mechanism 1000 without changing the maximum size of the disc body 12 of the orbiting scroll 1, further, in the embodiment, the center p of the base circle of the profile of the orbiting scroll 11 deviates from the geometric center o of the disc body 12 along the first direction, the center of the base circle of the profile of the fixed scroll 21 deviates along the first direction, and the deviation distance L of the center p of the base circle of the profile of the orbiting scroll 11 is equal to the deviation distance of the center of the base circle of the profile of the fixed scroll 21, wherein the first direction is the direction of the center of the base circle of the profile of the orbiting scroll 11 deviating from the tail end of the orbiting scroll 11. Compared with the intersection point c" before the deviation, the intersection point c of the first outer profile line 112 of the orbiting scroll 1 after the deviation deviates from the maximum boundary circle C, compared with the first outer profile line 112" of the orbiting scroll before the deviation, the length of the first outer profile line 112 allowed to be set is longer, the profile angle of the first outer profile line 112 is larger, and the first outer profile line 112 and the profile of the fixed scroll 21 mesh to form a larger outermost compression chamber, so that the compression mechanism 1000 provided by the embodiment can increase the displacement of the compression mechanism 1000 without changing the maximum size of the disc body 12.

[0035] Specifically, in the embodiment, the deviation distance L of the center p of the base circle of the profile of the orbiting scroll 11 is 1.0±0.5mm, and the included angle β between the first direction and the reference line d satisfies: 0°≤β≤20°, wherein the reference line d is a straight line tangent to the tail end of the orbiting scroll 11 and intersecting the geometric center o of the orbiting scroll 1. When the included angle β between the first direction and the reference line d is 0 degree, the length of the first outer profile line 112 increases the most when the same distance L deviates.

[0036] Further, in order to avoid vibration of the orbiting scroll 1 due to centrifugal force when the orbiting scroll 1 performs circumferential translation due to uneven mass distribution, in the embodiment, please refer to Figure 3The end face of the disc body 12 opposite to the orbiting scroll 11 is provided with a balance groove 121 to reduce the weight of the heavy end of the orbiting scroll 1, so that the orbiting scroll 1 meets the requirement of dynamic balance.

[0037] Further, in order to reduce the weight of the orbiting scroll 1, in the embodiment, referring to Figure 3 , the outer side wall of the disc body 12 is provided with an annular groove 122, the groove 122 is formed by cutting a part of the disc body 12, so as to reduce the weight of the disc body 12; during the production of the compression mechanism 1000, the groove 122 can also be used as a process groove for clamping the disc body 12 by a machining tool.

[0038] In the embodiment, referring to Figure 3 , the fixed scroll 2 is provided with an oil guide groove 23 on the side facing the orbiting scroll 1, the oil guide groove 23 can make the lubricating oil uniformly adhere to the first surfaces of the disc body 12 and the fixed scroll 2, and the oil guide groove 23 can also accelerate the flow speed of the lubricating oil and remove the heat and impurities generated by the friction between the disc body 12 and the fixed scroll 2.

[0039] The compression mechanism 1000 provided by the embodiment comprises an orbiting scroll 1 and a fixed scroll 2, the orbiting scroll 1 is provided with an orbiting scroll 11, and the profile of the orbiting scroll 11 comprises a first inner side profile 111 and a first outer side profile 112; the fixed scroll 2 is provided with a fixed scroll 21, and the profile of the fixed scroll 21 comprises a second inner side profile 211, a second outer side profile 212 and an inner side profile extension line 213, one end of the inner side profile extension line 213 is connected to the end of the second inner side profile 211, the orbiting scroll 11 is sleeved with the fixed scroll 21, and the orbiting scroll 1 can make circumferential translation relative to the fixed scroll 2; when the orbiting scroll 1 moves to a first position, the end of the first inner side profile 111 is engaged with the second outer side profile 212, and the orbiting scroll 11 and the fixed scroll 21 form a first suction chamber S1; when the orbiting scroll 1 moves to a second position, the end of the first outer side profile 112 is engaged with the other end of the inner side profile extension line 213, and the orbiting scroll 11 and the fixed scroll 21 form a second suction chamber S2. Since the second suction chamber S2 formed by the engagement between the end of the first outer side profile 112 and the inner side profile extension line 213 has a larger volume than the first suction chamber S1, compared with a conventional compression mechanism 1000', the volume of the outermost compression chamber composed of the first suction chamber S1 and the second suction chamber S2 is larger, and thus the displacement of the compression mechanism 1000 is larger. Therefore, the compression mechanism 1000 provided by the embodiment can increase the displacement of the compression mechanism 1000 while meeting the requirements of light weight and miniaturization of the compression mechanism 1000.

[0040] The embodiment of the present application also provides a compressor, which comprises a driving mechanism, a crankshaft and the compression mechanism 1000, one end of the crankshaft is connected with the driving mechanism, the output end of the crankshaft is connected with the mounting base 13 of the compression mechanism 1000, and the distance between the center p of the base circle of the profile line of the orbit scroll 11 and the center of the base circle of the profile line of the fixed scroll 21 is equal to the radius of the crankshaft.

[0041] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application, but the present application can be realized in many different forms and is not limited to the embodiments described in the specification, and the embodiments are not additional limitations on the content of the present application, and the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Furthermore, the above technical features continue to be combined with each other, forming various embodiments not listed above, which are all considered to be within the scope of the present application; further, for those skilled in the art, the above description can be improved or transformed, and all these improvements and transformations should be within the protection scope of the appended claims of the present application.

Claims

1. A compression mechanism characterized by, include: A moving scroll disk includes a disk body and moving scroll teeth. The moving scroll teeth are disposed on the end face of the disk body. The center of the base circle of the profile of the moving scroll teeth is offset from the geometric center of the disk body along a first direction. The profile of the moving scroll teeth includes a first inner profile and a first outer profile. The first direction is the direction in which the center of the base circle of the profile of the moving scroll teeth moves away from the tail end of the moving scroll teeth. A fixed vortex disk is provided with fixed vortex teeth. The profile of the fixed vortex teeth includes a second inner profile, a second outer profile, and an extension line of the inner profile. One end of the extension line of the inner profile is connected to the end of the second inner profile. The moving vortex teeth are fitted with the fixed vortex teeth. The moving vortex disk can perform circumferential translation relative to the fixed vortex disk. When the moving vortex moves to the first position, the end of the first inner profile engages with the second outer profile, and the moving vortex teeth and the fixed vortex teeth form a first air intake chamber. When the moving vortex moves to the second position, the end of the first outer profile engages with the other end of the extension line of the inner profile, and the moving vortex teeth and the fixed vortex teeth form a second air intake chamber.

2. The compression mechanism of claim 1, wherein, The offset distance L of the base circle center of the profile of the moving disk volute tooth is 1.0mm ± 0.5mm.

3. The compression mechanism of claim 1 or 2, wherein, The angle β between the first direction and the reference line satisfies: 0°≤β≤20°, wherein the reference line is a straight line that is tangent to the end of the moving disk volute tooth and intersects the geometric center of the moving disk.

4. The compression mechanism of claim 1, wherein, The volume of the second intake chamber is greater than the volume of the first intake chamber.

5. The compression mechanism of claim 1, wherein, The sidewalls of the fixed vortex teeth form a compression groove. An air inlet is provided at the bottom of the groove at the end away from the geometric center of the fixed vortex, and an exhaust hole is provided at the bottom of the groove at the end of the compression groove close to the geometric center of the fixed vortex. Both the air inlet and the exhaust hole penetrate the bottom of the compression groove.

6. The compression mechanism of claim 1, wherein, The end face of the disk body facing away from the vortex teeth of the moving disk is provided with a balancing groove.

7. The compression mechanism of claim 1, wherein, The disc is disc-shaped, and an annular groove is provided around the outer wall of the disc.

8. The compression mechanism of claim 1, wherein, An oil guide groove is provided on the side of the fixed scroll facing the moving scroll.

9. A compressor characterized by, Includes the compression mechanism as described in any one of claims 1-8.

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