R744 rotor type electric compressor

Abstract

The utility model discloses an R744 rotor type electric compressor, and belongs to the technical field of compressors. According to the technical scheme, the air compressor is characterized by comprising a shell and an inner cavity formed in the shell, a driving assembly and a compression assembly are arranged in the inner cavity, the compression assembly divides the inner cavity into an air inlet cavity and an exhaust cavity, and the driving assembly is located in the air inlet cavity; the compression assembly comprises a cylinder body, an upper plate body, a partition plate, a lower plate body, a first compression cavity and a second compression cavity, the first compression cavity is located between the upper plate body and the partition plate, the second compression cavity is located between the lower plate body and the partition plate, and the first compression cavity is located on the upper side of the second compression cavity. Rotors and swing pieces are arranged in the first compression cavity and the second compression cavity correspondingly, and efficient compression and circulation of refrigerants are achieved through the arrangement of the structure. The driving assembly and the compression assembly in the compressor work cooperatively, the performance of the R744 rotor type electric compressor is improved from the aspects of improving the operation efficiency, protecting the compressor, reducing pressure loss, ensuring lubricating oil circulation and the like, and a powerful guarantee is provided for stable operation of the compressor.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and more specifically, to the R744 rotary electric compressor. Background Technology

[0002] Traditional automotive air conditioning systems mostly use Freon-based refrigerants, such as R134a. However, these refrigerants have relatively high global warming potential (GWP), which to some extent exacerbates global warming. In light of this, the EU and other regions have passed relevant regulations to gradually restrict the use of high-GWP refrigerants and are actively promoting the research and development of environmentally friendly alternative refrigerants.

[0003] Among many potential alternative refrigerants, R744 refrigerant can still efficiently perform its heating function even in low-temperature environments below -30°C. R744 refrigerant not only has environmental advantages but also relatively low acquisition costs, thus it is considered an ideal refrigerant to replace traditional refrigerants.

[0004] Japanese Utility Model Patent Publication No. JP2009047161A discloses a hermetic compressor comprising a compression element for compressing a working fluid, a housing having a generally cylindrical main body plate, and the compression element fixed thereon. Additionally, a mounting plate is provided and fixed to the main body plate by welding. The compression element and the mounting plate are fastened together by six bolts, thereby achieving noise reduction in a hermetic compressor with a structure in which the compression element is fixed to a fixing member and the fixing member is fixed to the main body plate of the housing by welding.

[0005] Currently, existing automotive electric compressors are typically scroll electric compressors. However, due to the high saturation pressure of R744, directly applying it to scroll compressors would place extremely high demands on the performance and quality of both the moving and stationary rotors. Therefore, a new solution is needed to address these issues. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an R744 rotary electric compressor.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an R744 rotary electric compressor, comprising a housing and an inner cavity formed within the housing, wherein a drive assembly and a compression assembly are disposed within the inner cavity.

[0008] The compression assembly divides the inner cavity into an intake chamber and an exhaust chamber, and the drive assembly is located in the intake chamber;

[0009] The compression assembly includes a cylinder, an upper plate, a partition, a lower plate, and a first compression chamber and a second compression chamber. The first compression chamber is located between the upper plate and the partition, and the second compression chamber is located between the lower plate and the partition. The first compression chamber is located above the second compression chamber.

[0010] Both compression chamber one and compression chamber two are equipped with rotors and oscillating components. The oscillating components are connected to the rotors, and the rotors are eccentrically connected to the drive shaft of the drive assembly.

[0011] One end of the swinging component is located inside the bushing, and bushing holes are provided on the upper surfaces of the partition and the lower plate, with the bushing disposed in the bushing holes;

[0012] Compression chamber one and compression chamber two are separated into a low-pressure chamber and a high-pressure chamber by a rotor and a swinging component. The low-pressure chamber of compression chamber one is connected to the low-pressure chamber of compression chamber two, and the low-pressure chamber of compression chamber two is connected to the intake chamber.

[0013] The present invention is further configured such that: the partition includes a protrusion 1 protruding in the direction of compression chamber 1, and the bushing hole of compression chamber 1 is opened in the protrusion 1; the lower plate includes a protrusion 2 protruding in the direction of compression chamber 2, and the bushing hole of compression chamber 2 is opened in the protrusion 2.

[0014] The present invention is further configured such that: the housing includes a front cover and a rear cover, the cylinder has an outwardly extending support portion, the support portion, the front cover and the rear cover extend outward to form a positioning portion, the positioning portion is provided with a plurality of positioning holes, and the support portion, the front cover and the rear cover are connected to each other by bolts provided in the positioning holes.

[0015] The present invention is further configured to include an oil return pipe, an oil return channel is provided inside the drive shaft, one end of the oil return pipe extends to the bottom of the high-pressure chamber, the other end of the oil return pipe is connected to the oil return channel, and a plurality of oil return holes connected to the lubrication area are provided on the side of the drive shaft, the oil return holes being connected to the oil return channel.

[0016] The present invention is further configured such that the air inlet of the air intake chamber is provided with a filter component.

[0017] The present invention is further configured such that: an upper exhaust valve is provided above the compression chamber, the upper exhaust valve is connected to the outside of the upper plate, and an exhaust outlet is provided on the side wall of the front cover. When the pressure reaches the set value, the upper exhaust valve opens, and the gas flows sequentially through the gap between the exhaust outlet, the compression component and the compression chamber into the exhaust chamber. The path through which the gas flows is the exhaust channel.

[0018] The present invention is further configured such that: the driving component is a motor, the main shaft of the motor is connected to the drive shaft, a controller assembly is connected to one side of the housing, and the motor is electrically connected to the controller assembly.

[0019] In summary, this utility model has the following beneficial effects:

[0020] The R744 rotary electric compressor achieves highly efficient refrigerant compression and circulation through its structural design. The drive and compression components inside the compressor work together, utilizing the compression chamber formed between the front and rear covers to transfer and compress the refrigerant between the low-pressure and high-pressure chambers, thereby increasing the refrigerant's pressure and temperature. This not only ensures high efficiency in the compression process but also improves the overall structural stability and compactness through a rational layout. Simultaneously, the connection between the intake chamber and the air conditioning system ensures smooth refrigerant flow, further improving the energy efficiency ratio of the air conditioning system. The filter components, compression components, and oil return system comprehensively enhance the performance of the R744 rotary electric compressor by improving operating efficiency, protecting the compressor, reducing pressure loss, ensuring lubricating oil circulation, and extending service life, providing a strong guarantee for the compressor's stable operation. Attached Figure Description

[0021] Figure 1 A cross-sectional view of this utility model Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the air intake structure;

[0023] Figure 3 A cross-sectional view of this utility model Figure 2 ;

[0024] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0025] In the diagram: 11. Support; 12. Front cover; 13. Rear cover; 2. Controller assembly; 31. Rotor; 32. Swinging component; 4. Drive shaft; 41. Oil return channel; 51. Positioning part; 52. Partition; 53. Bushing hole; 54. Bushing; 6. Air intake chamber; 7. Oil return pipe. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. Example

[0027] like Figure 1 As shown, the R744 rotary electric compressor includes a housing and an inner cavity formed within the housing. The housing includes a front cover 12 and a rear cover 13. The cylinder has an outwardly extending support portion 11. The support portion 11, the front cover 12, and the rear cover 13 extend outward to form a positioning portion 51. The positioning portion 51 has several positioning holes. The support portion 11, the front cover 12, and the rear cover 13 are connected to each other by bolts set in the positioning holes. This solves the problem in the prior art where the positioning mechanism is directly opened on the side wall of the cylinder, reducing the structural strength of the cylinder. A drive assembly and a compression assembly are provided in the inner cavity. The compression assembly divides the inner cavity into an intake chamber 6 and an exhaust chamber. The drive assembly is a motor located in the intake chamber 6. The main shaft of the motor is connected to the drive shaft 4. A controller assembly 2 is connected to one side of the housing. The motor is electrically connected to the controller assembly 2.

[0028] like Figure 1 and Figure 3 As shown, the compression assembly includes a cylinder body, an upper plate, a partition 52, a lower plate, and compression chamber one and compression chamber two. Compression chamber one is located between the upper plate and the partition 52, and compression chamber two is located between the lower plate and the partition 52. Compression chamber one is located above compression chamber two. An upper exhaust valve is provided above compression chamber one and is connected to the outside of the upper plate. Both compression chamber one and compression chamber two are provided with a rotor 31 and a swing member 32. The swing member 32 is connected to the rotor 31, and the rotor 31 is eccentrically connected to the drive shaft 4 of the drive assembly. When the partition 52 closes one side of the compression chamber, the swing member 32 dynamically separates the other side of the compression chamber. One end of the swing member 32 is located inside the bushing 54.

[0029] like Figure 1 and Figure 3As shown, both the partition plate 52 and the upper surface of the lower plate are provided with bushing holes 53, and bushings 54 are disposed in the bushing holes 53. The partition plate 52 includes a protrusion 1 protruding towards the compression chamber 1. The protrusion 1 is a partition limiting plate connected to or integrally formed with the partition plate 52. The bushing hole 53 of the compression chamber 1 is opened in the protrusion 1. The lower plate includes a protrusion 2 protruding towards the compression chamber 2. The protrusion 2 is a lower limiting plate connected to the lower plate. The bushing hole 53 of the compression chamber 2 is opened in the protrusion 2. The bushing hole 53 of the partition plate 52 is used to accommodate the compression chamber 1. The compressor comprises a oscillating element 32 and a bushing 54. The bushing hole 53 in the lower plate accommodates the oscillating element 32 and bushing 54 in the second compression chamber. When the rotor 31 rotates, it drives the oscillating element 32 to move together, thereby changing the volume of the compression chamber and completing the compression process. The bushing 54 reduces direct friction between the oscillating element 32 and the housing, improving the movement accuracy and stability of the oscillating element 32, thus ensuring the long-term reliability of the compressor. Through the cooperation of the bushing 54 and the oscillating element 32, the compression chamber is effectively divided into a low-pressure chamber and a high-pressure chamber. Utilizing the characteristic that the oscillating element 32 has no significant hysteresis during movement, compared to the traditional spring return method, leakage problems during compression can be significantly reduced, thereby improving the compression efficiency and stability of the compressor.

[0030] like Figure 1 and Figure 2 As shown, compression chamber one and compression chamber two are separated into a low-pressure chamber and a high-pressure chamber by rotor 31 and swing member 32. The low-pressure chamber of compression chamber one is connected to the low-pressure chamber of compression chamber two, and the low-pressure chamber of compression chamber two is connected to the intake chamber 6. During operation, the refrigerant entering the low-pressure chamber is transferred to the high-pressure chamber by the rotation of rotor 31. As the space of the high-pressure chamber continues to shrink, the refrigerant reaches the set pressure and opens the exhaust valve opened on the upper or lower plate. The high-pressure refrigerant is discharged into the exhaust chamber, realizing the recycling of refrigerant, improving the energy efficiency ratio of the air conditioning system, helping the refrigerant to flow smoothly, ensuring the efficient operation of the compression process, and improving the overall performance of the compressor.

[0031] like Figure 1 As shown, the R744 rotary electric compressor also includes an oil return pipe 7. An oil return channel 41 is provided inside the drive shaft 4. One end of the oil return pipe 7 extends to the bottom of the high-pressure chamber, and the other end of the oil return pipe 7 communicates with the oil return channel 41. Several oil return holes are provided on the side of the drive shaft 4, and these holes communicate with the oil return channel 41. By using the oil return pipe 7, the lubricating oil accumulated at the bottom of the high-pressure chamber is transferred to the drive shaft 4, and then distributed to the bearings and other parts requiring lubrication by the oil return channel 41 and oil return holes within the drive shaft 4. Utilizing the pressure difference between the high-pressure chamber and the oil return channel 41 as the driving force, effective lubrication between components is achieved, which not only reduces wear on various components but also improves the overall service life of the compressor, ensuring the reliability and stability of the compressor during long-term operation.

[0032] like Figure 2 As shown, the air inlet of the air intake chamber 6 is equipped with a filter assembly. The filter assembly includes a hollow tube and a filter screen connected to one end of the hollow tube and covering the hollow tube. In response to the potential damage to internal components caused by the use of R744 refrigerant, by adding a filter assembly at the air inlet to filter impurities in the refrigerant, the impact of high-pressure gas on the internal components of the compressor can be effectively reduced without significantly reducing the intake pressure, thereby reducing the probability of damage to the internal structure, extending the service life of the compressor, and reducing the probability of compressor failure.

[0033] like Figure 1 and Figure 3 As shown, an upper exhaust valve is installed above the compression chamber 1. The upper exhaust valve is connected to the outside of the upper plate. An exhaust outlet is opened on the side wall of the front cover 12. After the pressure reaches the set value, the upper exhaust valve opens, and the gas flows sequentially through the exhaust outlet, the gap between the compression assembly and the compression chamber into the exhaust chamber. Figure 4 As shown, the gas flows through an exhaust channel with a U-shaped or Z-shaped cross-section, which helps reduce eddies and resistance in the refrigerant during the exhaust process. This allows the refrigerant to flow out of the compressor more smoothly, thereby improving exhaust efficiency and the overall performance of the compressor. The compressed refrigerant can be discharged smoothly in a set direction, reducing pressure loss and improving the compressor's exhaust efficiency. This achieves a continuous refrigerant compression process. The low-pressure chambers of the two compression chambers are interconnected, and the exhaust channel enables higher compressor integration and a shorter exhaust distance, improving the compressor's working efficiency and reliability.

[0034] Working principle:

[0035] like Figures 1-3 As shown, the drive assembly drives the rotor 31 to rotate via the drive shaft 4, thereby realizing the movement of the compression element. When the compressor is running, the pressure in the low-pressure chamber is lower than the pressure in the intake chamber 6. Refrigerant (such as R744) is drawn into the low-pressure chamber of the low-pressure chamber from the air conditioning system through the intake chamber 6. Before the refrigerant enters the intake chamber 6, it first passes through the filter assembly set at the intake port to effectively filter impurities in the refrigerant and prevent impurities from entering the compressor.

[0036] like Figure 3As shown, during the compression process, the refrigerant enters from the low-pressure chamber. As the rotor 31 rotates, the oscillating element 32 reciprocates within the bushing 54, pushing the refrigerant from the low-pressure chamber into the high-pressure chamber. The rotor 31 rotates periodically in the compression chamber. As the volume increases, the refrigerant is drawn into the compression chamber; at the outlet, the volume decreases, and the refrigerant is squeezed out into the high-pressure chamber. This process repeats continuously, achieving continuous compression of the refrigerant. When the pressure of the compressed refrigerant in the high-pressure chamber reaches the preset pressure, the lower exhaust valve and the upper exhaust valve are opened respectively. The refrigerant in compression chamber two is discharged through the exhaust channel, while the refrigerant in compression chamber one is directly discharged into the high-pressure chamber through the upper exhaust valve.

[0037] like Figure 1 As shown, during the compression process, the pressure difference between the high-pressure chamber and the return oil channel 41 serves as the driving force for oil return. The oil accumulated at the bottom of the high-pressure chamber is drawn into the return oil channel 41 inside the drive shaft 4 through the return oil pipe 7, and then distributed to various bearings and other components that require lubrication through the return oil hole.

[0038] like Figures 1-4 As shown, the above-mentioned intake, compression, exhaust and oil return processes are continuously cyclical, so that the refrigerant is continuously compressed and discharged in the compressor, while ensuring good lubrication of the internal components of the compressor and ensuring stable operation of the compressor.

[0039] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An R744 rotary electric compressor, comprising a housing and an inner cavity formed within the housing, wherein a drive assembly and a compression assembly are disposed within the inner cavity, characterized in that: The compression assembly divides the inner cavity into an intake chamber (6) and an exhaust chamber, and the drive assembly is located in the intake chamber (6); The compression assembly includes a cylinder, an upper plate, a partition (52), a lower plate, and a compression chamber one and a compression chamber two. The compression chamber one is located between the upper plate and the partition (52), and the compression chamber two is located between the lower plate and the partition (52). The compression chamber one is located on the upper side of the compression chamber two. Both compression chamber one and compression chamber two are provided with a rotor (31) and a swinging component (32). The swinging component (32) is connected to the rotor (31). The rotor (31) is eccentrically connected to the drive shaft (4) of the drive assembly. One end of the swinging component (32) is located inside the bushing (54). The upper surfaces of the partition (52) and the lower plate are provided with bushing holes (53), and the bushing (54) is disposed in the bushing holes (53). The compression chamber one and compression chamber two are separated into a low-pressure chamber and a high-pressure chamber by a rotor (31) and a swing member (32). The low-pressure chamber of the compression chamber one is connected to the low-pressure chamber of the compression chamber two, and the low-pressure chamber of the compression chamber two is connected to the intake chamber (6).

2. The R744 rotary electric compressor according to claim 1, characterized in that: The partition (52) includes a protrusion 1 protruding in the direction of compression chamber 1, and the bushing hole (53) of the compression chamber 1 is opened in the protrusion 1. The lower plate includes a protrusion 2 protruding in the direction of compression chamber 2, and the bushing hole (53) of the compression chamber 2 is opened in the protrusion 2.

3. The R744 rotary electric compressor according to claim 1, characterized in that: The housing includes a front cover (12) and a rear cover (13). The cylinder has an outwardly extending support portion (11). The support portion (11), the front cover (12), and the rear cover (13) extend outward to form a positioning portion (51). The positioning portion (51) has a plurality of positioning holes. The support portion (11), the front cover (12), and the rear cover (13) are connected to each other by bolts set in the positioning holes.

4. The R744 rotary electric compressor according to claim 1, characterized in that: It also includes an oil return pipe (7), and an oil return channel (41) is provided inside the drive shaft (4). One end of the oil return pipe (7) extends to the bottom of the high pressure chamber, and the other end of the oil return pipe (7) is connected to the oil return channel (41). Several oil return holes are provided on the side of the drive shaft (4) to connect to the lubrication area, and the oil return holes are connected to the oil return channel (41).

5. The R744 rotary electric compressor according to claim 1, characterized in that: The air inlet of the air inlet chamber (6) is equipped with a filter assembly.

6. The R744 rotary electric compressor according to claim 1, characterized in that: An upper exhaust valve is provided above the compression chamber 1. The upper exhaust valve is connected to the outside of the upper plate. An exhaust outlet is provided on the side wall of the front cover (12). When the pressure reaches the set value, the upper exhaust valve opens and the gas flows through the gap between the exhaust outlet, the compression component and the compression chamber in sequence into the exhaust chamber. The path through which the gas flows is the exhaust channel.

7. The R744 rotary electric compressor according to claim 1, characterized in that: The drive component is a motor, the main shaft of the motor is connected to the drive shaft (4) for transmission, and a controller assembly (2) is connected to one side of the housing. The motor is electrically connected to the controller assembly (2).

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