Scroll compressor with independent discharge passages

Abstract

The application discloses a scroll compressor with independent exhaust passages and belongs to the technical field of compressors. In view of the defects of the traditional scroll compressor center exhaust structure, such as high and low pressure airflow mutual mixing, large exhaust pulsation and low volume utilization rate, the application provides a single-disc multi-scroll structure: the static scroll disc and the dynamic scroll disc are respectively provided with continuous lines and segmented lines, and are engaged to form a plurality of independent exhaust chambers which are isolated from each other; each chamber is connected with an exhaust passage provided with a one-way valve, and the outlet of the passage is uniformly connected with a buffer chamber to stably discharge the compressed fluid. The application effectively avoids the high and low pressure chamber airflow mutual mixing, reduces the airflow loss, improves the effective compression volume and the exhaust displacement under the same external size, reduces the exhaust pulsation, and improves the stability of the whole machine.

Description

Technical Field

[0001] This invention belongs to the field of compressor technology, specifically relating to a novel scroll compressor with an independent exhaust chamber and a centrally shared gas collection chamber. Background Technology

[0002] 1. Traditional single scroll compressor

[0003] During operation, the compressed gas inside the cavity can be smoothly discharged through the assembly gaps, without the inherent problem of structural gas retention or accumulation that cannot be discharged.

[0004] This structure has two inherent flaws:

[0005] The effective space utilization rate on the outer side of the vortex disk is low, and the overall exhaust volume is limited under the same external dimensions.

[0006] The main shaft completes exhaust only once per revolution, resulting in poor airflow continuity and noticeable exhaust pulsation during equipment operation.

[0007] 2. Traditional single-disc twin-scroll compressor

[0008] To address the issues of large exhaust pulsation and small displacement in single-scroll exhaust systems, the industry has developed a single-disc dual-scroll structure. This structure allows for two exhaust cycles per rotation of the main shaft, theoretically increasing exhaust volume and reducing exhaust pulsation.

[0009] However, the traditional single-disc dual-vortex system adopts an integrated structure with a central shared air collection chamber. Due to structural design limitations, the airflow between the high and low pressure chambers is prone to cross-contamination during equipment operation.

[0010] Interference of airflow directly causes three types of adverse results:

[0011] The partially compressed high-pressure gas flows back to the low-pressure chamber, reducing the actual effective exhaust volume of the equipment.

[0012] The high-pressure airflow recirculation counteracts the work done by compression, and the overall compression ratio of the equipment decreases accordingly.

[0013] The airflow within the cavity interferes with each other, which not only fails to weaken the pulsation but also exacerbates the exhaust pulsation, resulting in poorer equipment operation stability.

[0014] 3. Single-disc three-scroll compressor

[0015] The three-vortex structure is a special application structure in the industry and is not a mainstream structure for mass production.

[0016] Because the toothed walls of the three-scroll profile are densely arranged, the overall space occupied by the profile is much larger than that of the single-scroll and double-scroll profiles. This structure is only suitable for large-diameter models, and achieves smaller exhaust pulsation by relying on the characteristics of multiple chambers and multiple exhaust. If this structure is used in small-diameter models, it will excessively squeeze the effective compression volume and has no practical value. Therefore, the three-scroll structure is basically not used in small-diameter operating conditions.

[0017] Meanwhile, traditional three-scroll compressors with an integrated central air-gathering structure also suffer from the inherent problem of cross-flow between high and low pressure chambers, resulting in the same drawbacks as displacement loss, reduced compression ratio, and uncontrolled exhaust pulsation.

[0018] In summary, all existing mainstream scroll compressors, including single-scroll, double-scroll, and triple-scroll types, generally adopt a basic structure with a central convergence and a shared central air intake chamber. This cannot fundamentally solve a series of inherent industry pain points such as cross-flow between high and low pressure chambers, high-pressure backflow, displacement loss, low compression ratio, large exhaust pulsation, and poor operational stability. As a result, the overall operating efficiency and user experience of these equipments always have significant shortcomings. Summary of the Invention

[0019] This invention provides a scroll compressor with an independent exhaust channel. The core components include a stationary scroll plate and a moving scroll plate. The stationary scroll plate is provided with stationary scroll teeth, and the moving scroll plate is provided with moving scroll teeth.

[0020] The key feature that distinguishes this invention from traditional structures is that one of the dynamic and static vortex teeth is an integral continuous vortex profile, while the other vortex tooth profile has a middle dividing region.

[0021] The moving vortex disk is constrained by the anti-rotation mechanism, and only performs revolution and translational motion without rotation. The moving and stationary vortex teeth maintain continuous meshing and relative translational motion. When the compression chamber travels inward along the vortex path to the end position of the exhaust chamber, it forms several independent exhaust chambers that are isolated from each other and whose fluids are not interconnected.

[0022] Each independent exhaust chamber is connected to an independent exhaust channel at its terminal position, and each independent exhaust channel is equipped with a one-way valve. The outlet ends of all independent exhaust channels are connected to a buffer chamber, and the exhaust is discharged after being collected and stabilized in the buffer chamber. The equipment is equipped with two or more sets of vortex tooth meshing structures. During operation, the air inlet opens and closes alternately to achieve independent exhaust of fluid compression and circulation. Combined with the meshing end face sealing structure, fluid leakage is prevented from the source.

[0023] 2. Core structural components

[0024] Dynamic and static vortex teeth: Two arrangement options are available, either static vortex teeth continuously vortex and dynamic vortex teeth with a dividing area, or dynamic vortex teeth continuously vortex and static vortex teeth with a dividing area, both of which can mesh to form an isolated independent exhaust chamber.

[0025] Independent exhaust chambers: multiple chambers are isolated from each other, and fluids do not communicate with each other, without the traditional central shared air collection chamber;

[0026] Independent exhaust channel + one-way valve: one chamber corresponds to one channel, and the one-way valve prevents high-pressure fluid backflow;

[0027] Buffer chamber: It is formed by the buffer block and the stationary vortex disk. The buffer block is concave and fits the outer side of the stationary vortex disk. After being sealed and fixed, it covers the outer ports of all exhaust channels. The buffer block opens the main exhaust port of the whole machine.

[0028] End face sealing structure: set on the meshing end face of the vortex teeth to ensure the sealing performance of the compression chamber and the independent exhaust chamber and prevent fluid leakage;

[0029] Anti-rotation mechanism: The dynamic scroll plate is constrained to only revolve around the sun and not rotate on its own axis, ensuring stable meshing and translation of the scroll teeth.

[0030] Working principle and operation process

[0031] When the equipment is working, the main shaft drives the moving scroll plate, which only undergoes revolution translation under the action of the anti-rotation mechanism, and does not rotate. The teeth of the moving scroll plate and the stationary scroll plate always maintain meshing.

[0032] By relying on the meshing of the vortex teeth with separated areas and the continuous vortex teeth, the outer cavity opens the air inlet in sequence to complete the fluid intake;

[0033] As the moving vortex disk continues to revolve and translate, the volume of the compression chamber gradually decreases, and the fluid is continuously compressed inward along the vortex path.

[0034] After the compression chamber reaches the end position, it naturally separates into multiple independent exhaust chambers that are not connected to each other;

[0035] The high-pressure fluid in each independent exhaust chamber is discharged independently by opening the check valve through the corresponding independent exhaust channel. The check valve simultaneously prevents the high-pressure fluid from flowing back in the opposite direction.

[0036] Multiple sets of vortex structures operate synchronously, and each air intake opens and closes alternately according to a phase pattern, completing the compression and independent exhaust actions in a continuous cycle.

[0037] The fluids discharged independently from each outlet are all drawn into the buffer chamber. After being stabilized and buffered by the buffer chamber, they are evenly discharged from the main exhaust port.

[0038] Throughout the entire operation, the fluids in each chamber are isolated from each other, and there is no cross-contamination between high and low pressure chambers. Combined with the dual design of alternating venting and buffer chamber pressure stabilization, venting pulsation is significantly reduced. The end face sealing structure ensures the sealing of the chambers throughout the process, avoiding fluid leakage and loss.

[0039] The beneficial effects of this invention are as follows: Relying on an isolated independent exhaust chamber design, it completely eliminates the problem of airflow crosstalk between high and low pressure chambers in traditional structures, resulting in no internal airflow loss and stable, undamaged exhaust volume. Each exhaust channel is equipped with an independent one-way valve, reliably preventing high-pressure fluid backflow, ensuring stable compression ratio, and significantly improving compression efficiency. Multiple chambers circulate and alternately exhaust air, combined with buffer chamber confluence and pressure stabilization, resulting in uniform and smooth airflow discharge, significantly reducing exhaust pulsation and lowering equipment vibration and noise. Under the same structural parameters of the scroll plate (77.95mm outer diameter, 17mm tooth height, 3.2mm tooth thickness, and eccentricity), the SolidW... Orks 3D modeling volume measurement comparison: Compared with the traditional single-scroll structure, the dual-scroll structure of this invention effectively increases the compression volume by 31.8%, with a significant advantage in intake displacement under the same external dimensions, and greatly optimizes space utilization; two scroll tooth arrangement methods are flexibly selectable, with strong structural adaptability, and can be made into dual-scroll and triple-scroll structures, taking into account both conventional working conditions and special working conditions of large diameter and low pulsation; the meshing end face sealing structure design is excellent, effectively avoiding fluid leakage, and simultaneously improving the sealing performance, stability and service life of the whole machine; it abandons the inherent drawbacks of the traditional central shared air chamber, with reasonable structural design, convenient processing and assembly, and is suitable for various mass production application scenarios of scroll compressors. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0042] Figure 3 This is a schematic diagram showing the motion states of the moving and stationary vortex teeth of the present invention.

[0043] Figure 4 This is a schematic diagram showing the motion states of the moving and stationary vortex teeth of the present invention.

[0044] Figure 5 This is an exploded view of the structure of the present invention;

[0045] Figure 6 This is a cross-sectional view of the present invention.

[0046] Explanation of reference numerals in the attached drawings: 1. Static vortex disk; 11. Static vortex tooth; 2. Moving vortex disk; 21. Moving vortex tooth; 3. Compression chamber; 4. Outlet channel; 5. Check valve; 6. Buffer chamber; 61. Buffer block; 62. Main outlet; 7. Inlet. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] Example

[0049] like Figures 1-6 The illustration shows a scroll compressor with an independent exhaust channel, mainly composed of a stationary scroll plate 1 and a moving scroll plate 2. Other components are existing technology and are not related to the technical problem claimed in this application, so they will not be described in detail here. The stationary scroll plate 1 has multiple stationary scroll teeth 11, which form multiple independent and isolated recesses on the stationary scroll plate 1, which are compression chambers 3. The moving scroll plate 2 has the same number of moving scroll teeth 21, each of which is inserted into a corresponding compression chamber 3. When the moving scroll plate 2 is driven to perform translational rotation (i.e., revolution but not rotation), the moving scroll teeth 21 perform meshing motion relative to the stationary scroll teeth 11 in their respective compression chambers 3, causing the volume of each compression chamber 3 to change periodically.

[0050] Each compression chamber 3 has an independent outlet channel 4 at its bottom or side wall for leading out the compressed high-pressure fluid. These outlet channels 4 are not interconnected and are independent of each other.

[0051] In this embodiment, a one-way valve 5 is installed inside each outlet channel 4. This one-way valve is prior art and will not be described in detail here.

[0052] In this embodiment, the buffer chamber is achieved by setting a buffer block 61. Specifically, a concave cavity is machined on one side of the buffer block 61, which is the main part of the buffer chamber 6. The concave side of the buffer block 61 is installed facing the stationary vortex disk 1 and fixed with bolts, or the buffer block is directly threaded to the stationary vortex disk, or other connection methods can be used, so that the concave cavity completely covers all the openings of the outlet channels 4 on the stationary vortex disk 1. A sealing gasket is placed between the buffer block 61 and the stationary vortex disk 1 to achieve a sealed connection. A total outlet 62 is also provided on the buffer block 61 for connecting to external pipelines. During operation, the high-pressure fluid discharged from each outlet channel 4 first flows into the buffer chamber 6, where the pressure and flow rate are balanced, and then it is discharged uniformly from the total outlet 62. The volume of the buffer chamber is about 15% of the maximum volume of a single chamber, which stabilizes and merges the multiple exhausts, further absorbs residual pulsations, and reduces energy loss at the system level.

[0053] In this embodiment, the number of both moving vortex teeth 21 and stationary vortex teeth 11 is set to two. The inner ends of the two stationary vortex teeth 11 are connected together, and the shapes of the two moving vortex teeth 21 are complementary to them. During the rotation of the moving vortex disk 2, the opening and closing phases of the inlets of the two compression chambers 3 are 180 degrees apart. That is, when the inlet 7 of the first compression chamber 3 is fully open and at maximum intake, the inlet 7 of the second compression chamber 3 is fully closed, and compression is taking place inside. The reverse is also true. In this way, at any given time, at least one compression chamber 3 is performing compression and exhaust, thereby achieving continuous exhaust.

[0054] To reduce leakage between the compression chambers 3 and to the outside of the compressor, a groove is made on the top end face of the stationary scroll tooth 11, facing the moving scroll 2. A sealing strip or O-ring is embedded in the groove as a sealing structure. This sealing structure adheres tightly to the end face of the moving scroll 2 under the action of elastic force or gas back pressure. Alternatively, the sealing structure can be placed between the top end face of the moving scroll tooth 21 and the stationary scroll 1. Both methods can effectively improve the volumetric efficiency of the compressor.

[0055] The applicant used SolidWorks 3D modeling and, under strict variable control (scroll disk outer diameter 77.95mm, thickness 17mm, profile wall thickness 3.2mm, consistent eccentricity), extracted the effective compression cavity solid volume of both the traditional single-scroll and the present invention's double-profile four-cavity design.

[0056] The effective compression volume is increased by 31.8%, verifying the significant effect of this invention in eliminating the negative impact of center clearance. This invention employs a multi-chamber alternating intake, independent circulating exhaust, and buffer chamber pressure stabilization structure, resulting in uniform and smooth exhaust airflow, significantly reduced exhaust pulsation, low vibration, low noise, and excellent stability during overall machine operation. Under the same external dimensions and structural parameters, the effective compression volume and intake displacement are significantly increased, and the utilization rate of the outer space of the scroll plate is maximized. Furthermore, this invention features two scroll tooth arrangement forms, adaptable to various structural forms such as double-scroll and triple-scroll, offering strong structural adaptability, good sealing performance, and convenient processing and assembly. It can meet the mass production needs of both conventional operating conditions and special large-diameter, low-pulsation operating conditions, simultaneously improving the overall machine's operational reliability and service life.

Claims

1. A scroll compressor with an independent exhaust passage, comprising a stationary scroll plate and a moving scroll plate, wherein the stationary scroll plate is provided with stationary scroll teeth and the moving scroll plate is provided with moving scroll teeth; Its features are: Of the static vortex tooth and the dynamic vortex tooth, one adopts an integral continuous vortex profile, while the other has a vortex tooth profile with a middle dividing area. Under the restriction of the anti-rotation mechanism, the moving scroll disk only performs revolution and translation without rotation. The moving and stationary scroll teeth maintain meshing and relative translation. When the compression chamber travels inward along the scroll path to the end position of the exhaust chamber, it forms several independent exhaust chambers that are isolated from each other and whose fluids are not connected. Each independent exhaust chamber has a corresponding independent exhaust channel at its end, and each independent exhaust channel is equipped with a one-way valve.

2. A scroll compressor with an independent exhaust passage according to claim 1, characterized in that: An integrated continuous vortex profile is arranged on the stationary vortex teeth, while the moving vortex teeth adopt a profile structure with a middle split area; Alternatively, an integrated continuous vortex profile is arranged on the moving vortex teeth, and the stationary vortex teeth adopt a profile structure with a middle dividing area. Both arrangement methods can form mutually isolated independent exhaust chambers through meshing translational motion.

3. A scroll compressor with an independent exhaust passage according to claim 1, characterized in that: Each independent exhaust channel is equipped with a check valve to prevent backflow of high-pressure fluid.

4. A scroll compressor with an independent exhaust passage according to claim 1, characterized in that: It is also equipped with a buffer chamber, and the outlet ends of all independent exhaust channels are connected to the inside of the buffer chamber. The fluid is then collected in the buffer chamber and discharged outward in a unified manner.

5. A scroll compressor with an independent exhaust passage according to claim 4, characterized in that: The buffer cavity is formed by the combination of a buffer block and a stationary vortex disk. The inner side of the buffer block has a concave structure and is fitted to the outer side of the stationary vortex disk. The buffer block covers the outer ports of all independent exhaust channels. The buffer block is sealed and fixedly connected to the static vortex disk. The main exhaust port of the whole machine is opened on the buffer block.

6. A scroll compressor with an independent exhaust passage according to any one of claims 1 to 5, characterized in that: The stationary vortex tooth and the moving vortex tooth are set into two or more sets of mating structures. During operation, the air inlet opens and closes alternately to continuously complete the fluid compression and independent exhaust actions. A sealing structure is provided at the meshing end face of the vortex gear to ensure the sealing of the compression chamber and the independent exhaust chamber and to prevent fluid leakage.

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