A scroll compressor structure

Abstract

The present invention discloses a scroll compressor structure, including: an upper casing, a main bracket, a middle casing, a lower casing, a compressor pump body and a crankshaft drive mechanism, etc. The upper casing forms a first accommodating space, the main bracket is arranged at the lower end of the upper casing, the main bracket forms a second accommodating space, the second accommodating space and the first accommodating space form a pump body installation space, the upper end of the middle casing is installed at the lower end of the main bracket, a third accommodating space is formed inside the middle casing, the third accommodating space is connected to the second accommodating space, the lower casing is installed at the lower end of the middle casing, a fourth accommodating space is formed between the lower casing and the middle casing, the compressor pump body is installed in the pump body installation space, and the crankshaft drive mechanism is installed in the third accommodating space. Through the application of the present invention, the axial clearance between the static and movable scrolls during the operation of the scroll compressor can be effectively controlled, the friction loss at the contact position between the movable and static scrolls is reduced, and the friction loss between the movable scroll and the wear-resistant plate is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, and in particular to a scroll compressor structure. Background Art

[0002] A scroll compressor is a type of positive displacement compressor, which has been widely used in many fields due to its superior performance. The compression component is composed of a movable scroll and a stationary scroll, which cooperate with each other to form a compression chamber, thereby compressing the working fluid entering the compression chamber. However, in the actual operation of the scroll compressor, especially when compressing refrigerant gas, the axial gas force generated mostly acts on the movable scroll and the stationary scroll, causing the movable scroll and the stationary scroll to separate from each other in the axial direction, and the axial gap between the movable scroll and the stationary scroll increases, resulting in a larger top gap leakage and a reduced volumetric efficiency. Summary of the invention

[0003] In view of this, in order to solve the above problems, the object of the present invention is to provide a scroll compressor structure, comprising:

[0004] An upper casing, wherein the upper casing is a shell structure with a middle portion arched upward, and a first accommodating space is formed at a lower portion of the upper casing;

[0005] A main bracket, the upper end of which is fixedly mounted on the lower end of the upper housing, the main bracket is a hollow frame structure, a second accommodating space is formed inside the main bracket, and the upper part of the second accommodating space is connected to the lower part of the first accommodating space, and the second accommodating space and the first accommodating space together form a pump body installation space;

[0006] A middle casing, the upper end of which is fixedly mounted on the lower end of the main bracket, the middle casing is a hollow shell structure, a third accommodating space is formed inside the middle casing, and the upper part of the third accommodating space is connected to the lower part of the second accommodating space;

[0007] A lower cover, the upper end of which is fixedly mounted on the lower end of the middle casing, and a fourth accommodating space is formed between the upper portion of the lower cover and the lower portion of the middle casing;

[0008] A compressor pump body, wherein the compressor pump body is installed in the pump body installation space;

[0009] A crankshaft driving mechanism, the crankshaft driving mechanism is installed in the third accommodating space, and the crankshaft driving mechanism is connected to the compressor pump body;

[0010] an electric control component, wherein the electric control component is installed in the fourth accommodating space;

[0011] Wherein, the compressor pump body comprises:

[0012] A partition, the partition is installed in the first accommodating space, and the upper end of the partition is fixedly connected to the upper housing;

[0013] A stationary scroll, the stationary scroll is installed in the first accommodating space, the stationary scroll is arranged at the lower end of the partition, a floating gap is reserved between the stationary scroll and the partition along the axial direction of the stationary scroll, and the inner contour of the upper end of the main bracket is smaller than the inner contour of the lower end of the upper casing, an annular support edge is formed at the inner edge of the upper end of the main bracket, the inner contour of the annular support edge is larger than the outer contour of the lower end of the stationary scroll, and the outer edge of the lower end of the stationary scroll abuts against the annular support edge;

[0014] A movable scroll is installed in the second accommodating space, the movable scroll is arranged at the lower end of the fixed scroll, the lower end of the movable scroll is connected to the crankshaft driving mechanism, and the crankshaft driving mechanism drives the movable scroll to rotate relative to the fixed scroll.

[0015] In another preferred embodiment, a first annular sealing strip and a second annular sealing strip are installed on the lower surface of the partition, and the central axes of the first annular sealing strip and the second annular sealing strip are both arranged to coincide with the central axis of the static scroll, and the diameter of the first annular sealing strip is smaller than the diameter of the second annular sealing strip. A first groove is provided on the upper surface of the static scroll, and the first groove is arranged in an annular shape. The lower end of the first annular sealing strip abuts against the side of the first groove close to the central axis of the static scroll along the annular direction, and the lower end of the second annular sealing strip abuts against the side of the first groove away from the central axis of the static scroll along the annular direction. The first groove is arranged between the first annular sealing strip and the second annular sealing strip. A closed upper back pressure chamber is formed between the first groove and the partition through the first annular sealing strip and the second annular sealing strip. The central axis of the first groove coincides with the central axis of the static scroll, and a compression chamber is formed between the static scroll and the movable scroll. An upper through hole is provided on the static scroll, and the lower end of the upper through hole is communicated with the compression chamber, and the upper end of the upper through hole is communicated with the upper back pressure chamber.

[0016] In another preferred embodiment, a wear-resistant plate is fixedly installed in the second accommodating space, and the wear-resistant plate is arranged in an annular plate structure. The upper end of the wear-resistant plate abuts against the lower end of the movable scroll, and a second groove is provided on the upper surface of the wear-resistant plate along the annular direction. The second groove is arranged in an annular shape, and a lower back pressure chamber is formed between the inner side of the second groove and the movable scroll. A lower through hole is provided on the movable scroll, and the upper end of the lower through hole is communicated with the compression chamber, and the lower end of the lower through hole is communicated with the lower back pressure chamber.

[0017] In another preferred embodiment, the thickness of the first annular sealing strip along the axial direction of the fixed scroll and the thickness of the second annular sealing strip along the axial direction of the fixed scroll are both greater than the height of the floating gap.

[0018] In another preferred embodiment, a cross ring is installed in the second accommodating space, the cross ring is installed between the main bracket and the movable scroll, and the cross ring is used to prevent the movable scroll from rotating.

[0019] In another preferred embodiment, the crankshaft drive mechanism includes: a lower bearing, an upper bearing, a crankshaft, a motor stator, a motor rotor, a moving plate bearing and an eccentric sleeve, the lower bearing is fixedly installed at the bottom of the third accommodating space, the lower end of the crankshaft is sleeved in the lower bearing, the upper end of the crankshaft passes through the main bracket, the upper bearing and the eccentric sleeve in sequence from bottom to top, the upper bearing is fixedly connected to the main bracket, the outer side of the eccentric sleeve is also sleeved with the moving plate bearing, the moving scroll is installed on the moving plate bearing, the motor stator is fixedly installed on the inner wall of the middle casing, the motor rotor is matched with the motor stator, and the motor rotor is installed on the crankshaft.

[0020] In another preferred embodiment, the height of the floating gap along the axial direction of the static scroll is set between 0.2 mm and 1 mm.

[0021] In another preferred embodiment, it further comprises: a balancing block structure, wherein the balancing block structure is fixedly mounted on one end of the crankshaft connected to the movable scroll.

[0022] In another preferred embodiment, it also includes: a plurality of guide rods and a plurality of guide seats, each of the guide rods is arranged in the vertical direction, the lower end of each guide rod is fixedly connected to the upper end of the static scroll, a plurality of guide seats are embedded in the lower part of the partition, and a guide hole is provided at the lower end of each guide seat, each guide hole is arranged along the axial direction of the static scroll, each guide hole is arranged directly opposite to a guide rod, and the upper end of each guide rod can be telescopically installed in the guide hole.

[0023] In another preferred embodiment, it also includes: a plurality of first fixing bolts, a plurality of first bolt holes are opened at the outer edge of the upper housing, a plurality of second bolt holes are opened at the outer edge of the main bracket, and a plurality of third bolt holes are opened at the outer edge of the middle housing, each of the first bolt holes is opposite to a second bolt hole, each of the second bolt holes is opposite to a third bolt hole, and each of the first fixing bolts passes through a first bolt hole and a second bolt hole in sequence and is fixed in the third bolt hole.

[0024] Due to the adoption of the above-mentioned technical scheme, the present invention has the following positive effects compared with the prior art: through the application of the present invention, the entire compressor structure is compact and the design is reasonable, the axial clearance between the static scroll and the movable scroll during the operation of the scroll compressor can be effectively controlled, the static scroll and the movable scroll can be reasonably installed and limited respectively, and the axial gas force generated in the compression chamber can be offset to a certain extent through the design of the upper through hole and the lower through hole, thereby reducing the friction loss at the contact position between the movable scroll and the static scroll, and reducing the friction loss between the movable scroll and the wear-resistant plate, which is suitable for the operating capacity requirements under various working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a scroll compressor structure of the present invention;

[0026] Figure 2 A schematic diagram of a compressor pump body of a scroll compressor structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the guide structure of a compressor pump body of a scroll compressor structure of the present invention.

[0028] In the attached figure:

[0029] 1. Upper casing; 2. Main bracket; 3. Middle casing; 4. Lower casing; 5. Compressor pump body; 6. Crankshaft drive mechanism; 7. Electronic control components; 51. Partition plate; 52. Stationary scroll; 21. Annular support edge; 53. Moving scroll; 511. First annular sealing strip; 512. Second annular sealing strip; 521. First groove; 522. Upper back pressure chamber; 54. Compression chamber; 541. Middle and low compression chamber; 542. Middle and high compression chamber; 523. Upper through hole; 55. Wear plate; 551. Second groove Groove; 552, lower back pressure chamber; 531, lower through hole; 22, cross slip ring; 61, lower bearing; 62, upper bearing; 63, crankshaft; 64, motor stator; 65, motor rotor; 66, eccentric sleeve; 67, balance block structure; 68, moving plate bearing; 11, guide rod; 12, guide seat; 13, first fixing bolt; 14, first bolt hole; 15, second bolt hole; 16, third bolt hole; 81, first guide hole; 82, second guide hole; 83, protrusion; 84, guide piece. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0031] like Figure 1 and Figure 2As shown, a scroll compressor structure of a preferred embodiment is shown, comprising: an upper casing 1, the upper casing 1 is a shell structure with a middle portion arched upward, and the lower portion of the upper casing 1 forms a first accommodation space; a main bracket 2, the upper end of the main bracket 2 is fixedly mounted on the lower end of the upper casing 1, the main bracket 2 is a hollow frame structure, a second accommodation space is formed inside the main bracket 2, and the upper portion of the second accommodation space is connected to the lower portion of the first accommodation space, and the second accommodation space and the first accommodation space together form a pump body installation space; a middle casing 3, The upper end of the middle casing 3 is fixedly mounted on the lower end of the main bracket 2. The middle casing 3 is a hollow shell structure. A third accommodating space is formed inside the middle casing 3. The upper part of the third accommodating space is connected to the lower part of the second accommodating space; the lower cover 4, the upper end of the lower cover 4 is fixedly mounted on the lower end of the middle casing 3, and a fourth accommodating space is formed between the upper part of the lower cover 4 and the lower part of the middle casing 3; the compressor pump body 5, the compressor pump body 5 is installed in the pump body installation space; the crankshaft 63 drive mechanism 6, the crankshaft 63 drive mechanism 6 is installed in the third accommodating space In the space, the crankshaft 63 driving mechanism 6 is connected to the compressor pump body 5; the electronic control component 7 is installed in the fourth accommodating space; wherein the compressor pump body 5 includes: a partition 51, the partition 51 is installed in the first accommodating space, and the upper end of the partition 51 is fixedly connected to the upper casing 1; a static vortex 52, the static vortex 52 is installed in the first accommodating space, the static vortex 52 is arranged at the lower end of the partition 51, and a floating gap is reserved between the static vortex 52 and the partition 51 along the axial direction of the static vortex 52, and the inner wheel at the upper end of the main bracket 2 The contour is smaller than the inner contour of the lower end of the upper casing 1, and an annular supporting edge 21 is formed at the inner edge of the upper end of the main bracket 2. The inner contour of the annular supporting edge 21 is smaller than the outer contour of the lower end of the static scroll 52, and the outer edge of the lower end of the static scroll 52 abuts against the annular supporting edge 21; the movable scroll 53, the movable scroll 53 is installed in the second accommodating space, the movable scroll 53 is arranged at the lower end of the static scroll 52, and the lower end of the movable scroll 53 is connected to the crankshaft 63 driving mechanism 6, and the crankshaft 63 driving mechanism 6 drives the movable scroll 53 to rotate relative to the static scroll 52.Furthermore, the static scroll 52 is always pressed against the annular support edge 21 of the main bracket 2 during operation. Under ideal working conditions, the pressure of the static scroll 52 on the main bracket 2 can be adjusted to be close to 0, thereby avoiding the static scroll 52 being directly pressed on the movable scroll 53 to generate additional contact pressure, thereby maintaining a suitable fitting clearance between the movable scroll 53 and the static scroll 52, reducing power consumption, and reducing contact wear between the movable scroll 53 and the static scroll 52. The tooth top fitting clearance between the movable scroll 53 and the static scroll 52 is preferably 0 to 30 μm in consideration of volumetric efficiency and thermal expansion effect. And the closer to 0 the better; when the above-mentioned vortex compression and structure are operating under extreme conditions or ultra-high load conditions, when the exhaust temperature is extremely high, it will cause thermal expansion of the vortex teeth on the movable scroll 53 and the fixed scroll 52. At this time, the fixed scroll 52 can be axially adjusted up and down in the floating gap along the axial direction, thereby increasing the axial gap between the movable scroll 53 and the fixed scroll 52, and improving the reliability of the compressor operation; wherein, the crankshaft 63 drive mechanism 6 serves as a power source for providing movement of the movable scroll 53, and the electronic control component is preferably a control and speed regulation device of a motor, which is used to control the movement state of the movable scroll 53. Furthermore, during the operation of the entire compressor, specifically, as the movable scroll 53 and the stationary scroll 52 mesh, the fluid enters the compression chamber 54 through the outer air inlet hole, and the fluid is gradually compressed from the end away from the center of the stationary scroll 52 to the end close to the center of the stationary scroll 52. During this process, the fluid is compressed from a medium-low pressure state to a medium-high pressure state in the compression chamber 54, and is finally discharged from the exhaust hole set in the center of the stationary scroll; therefore, the compression chamber 54 can be divided into a medium-low compression chamber 541 and a medium-high compression chamber 542 according to the pressure properties of the fluid, the medium-high compression chamber 542 is formed at one end close to the center of the stationary scroll 52, and the medium-high compression chamber 542 has a fluid in a medium-high pressure state; the medium-low compression chamber 541 is formed at one end away from the center of the stationary scroll 52, and the medium-low compression chamber 541 has a fluid in a medium-low pressure state.

[0032] Further, as a preferred embodiment, a first annular sealing strip 511 and a second annular sealing strip 512 are installed on the lower surface of the partition plate 51. The central axis of the first annular sealing strip 511 and the central axis of the second annular sealing strip 512 are both arranged to coincide with the central axis of the static scroll 52. The diameter of the first annular sealing strip 511 is smaller than the diameter of the second annular sealing strip 512. A first groove 521 is provided on the upper surface of the static scroll 52. The first groove 521 is arranged in an annular shape. The lower end of the first annular sealing strip 511 abuts against the side of the first groove 521 close to the central axis of the static scroll 52 along the annular direction, and the lower end of the second annular sealing strip 512 abuts against the The first groove 521 is on one side away from the central axis of the static scroll 52, and the first groove 521 is arranged between the first annular sealing strip 511 and the second annular sealing strip 512. A closed upper back pressure chamber 522 is formed between the first groove 521 and the partition plate 51 through the first annular sealing strip 511 and the second annular sealing strip 512. The central axis of the first groove 521 coincides with the central axis of the static scroll 52, and a compression chamber 54 is formed between the static scroll 52 and the movable scroll 53. An upper through hole 523 is opened on the static scroll 52, and the lower end of the upper through hole 523 is connected to the middle and high compression chamber 542, and the upper end of the upper through hole 523 is connected to the upper back pressure chamber 522. Furthermore, a sealed upper back pressure chamber 522 is formed through the first groove 521, and the medium and high pressure is introduced from the medium and high compression chamber 542 and enters into the upper back pressure chamber 522 through the upper through hole 523. The static vortex 52 is subjected to the medium and high pressure of the upper back pressure chamber 522 and the exhaust chamber pressure, and is used to offset all axial gas forces with a margin, and the static vortex 52 is pressed against the annular support edge 21.

[0033] Further, as a preferred embodiment, a wear-resistant plate 55 is fixedly installed in the second accommodating space. The wear-resistant plate 55 is arranged in an annular plate structure. The upper end of the wear-resistant plate 55 abuts against the lower end of the movable scroll 53. A second groove 551 is provided on the upper surface of the wear-resistant plate 55 along the annular direction. The second groove 551 is arranged in an annular shape. A lower back pressure chamber 552 is formed between the inner side of the second groove 551 and the movable scroll 53. A lower through hole 531 is provided on the movable scroll 53. The upper end of the lower through hole 531 is connected to the middle and low compression chamber 541, and the lower end of the lower through hole 531 is connected to the lower back pressure chamber 552. Furthermore, medium and low pressures are introduced from the medium and low compression chamber 541 through the upper through hole 523, and enter the lower back pressure chamber 552 through the lower through hole 531, and the movable scroll 53 is pressed against the wear-resistant plate 55 by the axial gas force and the medium and low pressures of the lower back pressure chamber 552, and since the pressure in the lower back pressure chamber 552 offsets most of the axial pressure of the movable scroll 53 acting on the wear-resistant plate 55, the friction between the movable scroll 53 and the wear-resistant plate 55 is reduced, the friction loss is reduced, and the working performance of the movable scroll 53 is improved.

[0034] Further, as a preferred embodiment, the thickness of the first annular sealing strip 511 and the thickness of the second annular sealing strip 512 along the axial direction of the fixed scroll 52 are both greater than the height of the floating gap. Further, regardless of the working conditions, even if the fixed scroll 52 makes an axial floating movement, the upper back pressure chamber 522 of the first annular sealing strip 511 and the second annular sealing strip 512 is always in a sealed state, so that the pressure in the upper back pressure chamber 522 can act stably.

[0035] Further, as a preferred embodiment, a cross slip ring 22 is installed in the second accommodating space, and the cross slip ring 22 is installed between the main bracket 2 and the movable scroll 53. The cross slip ring 22 is used to prevent the movable scroll 53 from rotating. Further, the cross slip ring 22 is placed on the main bracket 2 as a mechanism to prevent the movable scroll 53 from rotating, so that the movable scroll 53 only rotates with the meshing between the crankshaft 63 and the fixed scroll 52.

[0036] Further, as a preferred embodiment, the crankshaft 63 driving mechanism 6 includes: a lower bearing 61, an upper bearing 62, a crankshaft 63, a motor stator 64, a motor rotor 65, an eccentric sleeve 66 and a moving plate bearing 68. The lower bearing 61 is fixedly installed at the bottom of the third accommodating space, the lower end of the crankshaft 63 is sleeved in the lower bearing 61, and the upper end of the crankshaft 63 passes through the main bracket 2, the upper bearing 62 and the eccentric sleeve 66 from bottom to top in sequence. The upper bearing 62 is fixedly connected to the main bracket 2, the moving scroll 53 is installed on the moving plate bearing 68, the motor stator 64 is fixedly installed on the inner wall of the middle casing 3, the motor rotor is matched with the motor stator 64, and the motor rotor 65 is installed on the crankshaft 63.

[0037] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention.

[0038] The present invention also has the following implementation modes based on the above:

[0039] In a further embodiment of the present invention, the height of the floating clearance along the axial direction of the fixed scroll 52 is set between 0.2 mm and 1 mm. Furthermore, in the case of abnormal operation of the scroll compressor structure, a certain axial movement avoidance distance is reserved for the fixed scroll 52.

[0040] In a further embodiment of the present invention, a balancing block structure 67 is further included, and the balancing block structure 67 is fixedly mounted on one end of the crankshaft 63 connected to the movable scroll 53. Furthermore, the balancing block structure 67 is used to balance the crankshaft 63 when it rotates eccentrically, thereby reducing additional mechanical wear and noise.

[0041] In a further embodiment of the present invention, it also includes: a plurality of guide rods 11 and a plurality of guide seats 12, each guide rod 11 is arranged in the vertical direction, the lower end of each guide rod 11 is fixedly connected to the upper end of the static vortex 52, a plurality of guide seats 12 are embedded in the lower part of the partition 51, and a guide hole is provided at the lower end of each guide seat 12, each guide hole is arranged along the axial direction of the static vortex 52, each guide hole is arranged directly opposite to a guide rod 11, and the upper end of each guide rod 11 can be telescopically installed in the guide hole. Further, a guide mechanism is provided for the static vortex 52 to perform axial floating movement, so that the static vortex 52 can only perform a certain displacement along the axial direction without colliding with the inner wall of the upper shell, preferably, the guide seat 12 can be a bolt structure, the upper end of the bolt structure is used to fix the partition 51 to the upper shell, and the lower end of the bolt structure is used to form the above-mentioned guide hole.

[0042] In another preferred embodiment, the structure having similar axial motion guiding function as the guide rod 11 and the guide seat 12 described above also has the following Figure 3 The guide structure shown, specifically, the outer edge of the static scroll 52 extends outward in the horizontal direction to form a plurality of protrusions 83, and each protrusion 83 is provided with a first guide hole 81, and a plurality of guide members 84 are also provided, each guide member 84 is provided in a cylindrical structure, each guide member 84 is provided along the axial direction of the static scroll 52, and the upper end of each guide member 84 is sleeved in the first guide hole 81, and a plurality of second guide holes 82 are also provided at the outer edge of the upper surface of the main bracket 2, each second guide hole 82 is provided opposite to a first guide hole 81, and the lower end of each guide member 84 is sleeved in the second guide hole 82, so that the static scroll can float up and down relative to the guide member 84 along the axial direction of the static scroll 52 under the cooperation of the guide member 84 and the first guide hole 81 through the guiding effect of the first guide hole 81.

[0043] In a further embodiment of the present invention, it also includes: a plurality of first fixing bolts 13, a plurality of first bolt holes 14 are opened at the outer edge of the upper casing 1, a plurality of second bolt holes 15 are opened at the outer edge of the main bracket 2, and a plurality of third bolt holes 16 are opened at the outer edge of the middle casing 3, each first bolt hole 14 is opposite to a second bolt hole 15, each second bolt hole 15 is opposite to a third bolt hole 16, and each first fixing bolt 13 passes through a first bolt hole 14 and a second bolt hole 15 in sequence and is fixed in the third bolt hole 16.

[0044] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A scroll compressor structure, characterized in that: include: An upper casing, wherein the upper casing is a shell structure with a middle portion arched upward, and a first accommodating space is formed at a lower portion of the upper casing; A main bracket, the upper end of which is fixedly mounted on the lower end of the upper housing, the main bracket is a hollow frame structure, a second accommodating space is formed inside the main bracket, and the upper part of the second accommodating space is connected to the lower part of the first accommodating space, and the second accommodating space and the first accommodating space together form a pump body installation space; A middle casing, the upper end of which is fixedly mounted on the lower end of the main bracket, the middle casing is a hollow shell structure, a third accommodating space is formed inside the middle casing, and the upper part of the third accommodating space is connected to the lower part of the second accommodating space; A lower cover, the upper end of which is fixedly mounted on the lower end of the middle casing, and a fourth accommodating space is formed between the upper portion of the lower cover and the lower portion of the middle casing; A compressor pump body, wherein the compressor pump body is installed in the pump body installation space; A crankshaft driving mechanism, the crankshaft driving mechanism is installed in the third accommodating space, and the crankshaft driving mechanism is connected to the compressor pump body; an electric control component, wherein the electric control component is installed in the fourth accommodating space; Wherein, the compressor pump body comprises: A partition, the partition is installed in the first accommodating space, and the upper end of the partition is fixedly connected to the upper housing; A stationary scroll, the stationary scroll is installed in the first accommodating space, the stationary scroll is arranged at the lower end of the partition, a floating gap is reserved between the stationary scroll and the partition along the axial direction of the stationary scroll, and the inner contour of the upper end of the main bracket is smaller than the inner contour of the lower end of the upper casing, an annular support edge is formed at the inner edge of the upper end of the main bracket, the inner contour of the annular support edge is larger than the outer contour of the lower end of the stationary scroll, and the outer edge of the lower end of the stationary scroll abuts against the annular support edge; A movable scroll is installed in the second accommodating space, the movable scroll is arranged at the lower end of the fixed scroll, the lower end of the movable scroll is connected to the crankshaft driving mechanism, and the crankshaft driving mechanism drives the movable scroll to rotate relative to the fixed scroll.

2. The scroll compressor structure according to claim 1, characterized in that: A first annular sealing strip and a second annular sealing strip are installed on the lower surface of the partition, and the central axes of the first annular sealing strip and the second annular sealing strip are both arranged to coincide with the central axis of the static scroll, and the diameter of the first annular sealing strip is smaller than the diameter of the second annular sealing strip. A first groove is provided on the upper surface of the static scroll, and the first groove is arranged in an annular shape. The lower end of the first annular sealing strip abuts against the side of the first groove close to the central axis of the static scroll along the annular direction, and the lower end of the second annular sealing strip abuts against the side of the first groove away from the central axis of the static scroll along the annular direction. The first groove is arranged between the first annular sealing strip and the second annular sealing strip. A closed upper back pressure chamber is formed between the first groove and the partition through the first annular sealing strip and the second annular sealing strip. The central axis of the first groove coincides with the central axis of the static scroll, and a compression chamber is formed between the static scroll and the movable scroll. An upper through hole is provided on the static scroll, and the lower end of the upper through hole is communicated with the compression chamber, and the upper end of the upper through hole is communicated with the upper back pressure chamber.

3. The scroll compressor structure according to claim 2, characterized in that: A wear-resistant plate is fixedly installed in the second accommodating space, and the wear-resistant plate is arranged in an annular plate structure. The upper end of the wear-resistant plate abuts against the lower end of the movable scroll. A second groove is provided on the upper surface of the wear-resistant plate along the annular direction. The second groove is arranged in an annular shape. A lower back pressure chamber is formed between the inner side of the second groove and the movable scroll. A lower through hole is provided on the movable scroll, and the upper end of the lower through hole is communicated with the compression chamber, and the lower end of the lower through hole is communicated with the lower back pressure chamber.

4. The scroll compressor structure according to claim 2, characterized in that: A thickness of the first annular sealing strip along the axial direction of the fixed scroll and a thickness of the second annular sealing strip along the axial direction of the fixed scroll are both greater than a height of the floating gap.

5. The scroll compressor structure according to claim 1, characterized in that: A cross ring is installed in the second accommodating space. The cross ring is installed between the main bracket and the movable scroll. The cross ring is used to prevent the movable scroll from rotating.

6. The scroll compressor structure according to claim 1, characterized in that: The crankshaft driving mechanism includes: a lower bearing, an upper bearing, a crankshaft, a motor stator, a motor rotor, a moving plate bearing and an eccentric sleeve. The lower bearing is fixedly installed at the bottom of the third accommodating space, and the lower end of the crankshaft is sleeved in the lower bearing. The upper end of the crankshaft passes through the main bracket, the upper bearing and the eccentric sleeve in sequence from bottom to top. The upper bearing is fixedly connected to the main bracket. The outer side of the eccentric sleeve is also sleeved with a moving plate bearing, and the moving scroll is installed on the moving plate bearing. The motor stator is fixedly installed on the inner wall of the middle casing, and the motor rotor is matched with the motor stator and installed on the crankshaft.

7. The scroll compressor structure according to claim 1, characterized in that: The height of the floating gap along the axial direction of the stationary scroll is set between 0.2 mm and 1 mm.

8. The scroll compressor structure according to claim 6, characterized in that: Also includes: A balancing block structure is fixedly mounted on one end of the crankshaft connected to the movable scroll.

9. The scroll compressor structure according to claim 1, characterized in that: Also includes: A plurality of guide rods and a plurality of guide seats, each of the guide rods is arranged in a vertical direction, the lower end of each guide rod is fixedly connected to the upper end of the static scroll, a plurality of guide seats are embedded in the lower part of the partition, and a guide hole is provided at the lower end of each guide seat, each guide hole is arranged along the axial direction of the static scroll, each guide hole is arranged directly opposite to a guide rod, and the upper end of each guide rod can be telescopically installed in the guide hole.

10. The scroll compressor structure according to claim 1, characterized in that: Also includes: A plurality of first fixing bolts, a plurality of first bolt holes are opened at the outer edge of the upper housing, a plurality of second bolt holes are opened at the outer edge of the main bracket, and a plurality of third bolt holes are opened at the outer edge of the middle housing, each of the first bolt holes is opposite to a second bolt hole, each of the second bolt holes is opposite to a third bolt hole, and each of the first fixing bolts passes through a first bolt hole and a second bolt hole in sequence and is fixed in the third bolt hole.

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