A multi-cylinder compressor integrated with a composite distributor

Abstract

The utility model belongs to compressor technical field especially relates to a multi -cylinder compressor of integrated composite distributor, including casing, motor and the compression subassembly of setting in the casing, the compression subassembly has at least two compression cavities, and the casing is provided with the composite distributor, and the composite distributor includes at least two independent volume chambers, each volume chamber is communicated with external system through independent inlet pipe to receive refrigerant, and is connected with the suction port of corresponding compression cavity through independent discharge pipe, to realize the independent distribution and supply of refrigerant. The independent volume chamber design of composite distributor avoids the refrigerant distribution uneven and the problem of compression cavity mutual interference caused by traditional single distributor, so that each compression cavity can independently obtain refrigerant according to its own working condition, ensures that the compressor is stably operated under different displacement or different refrigerant state, and simultaneously integrates the composite distributor in the casing, saves the space, improves the compactness of structure and system design flexibility.

Description

Technical Field

[0001] This utility model belongs to the field of compressor technology, and in particular relates to a multi-cylinder compressor with an integrated composite liquid distributor. Background Technology

[0002] As a core component in refrigeration, air conditioning, and various industrial refrigeration and heating systems, the performance of the compressor directly affects the energy efficiency ratio, operational stability, and applicability of the entire system. In the field of compressor technology, twin-cylinder compressors are widely used in household air conditioners, commercial air conditioners, heat pump systems, and some industrial refrigeration equipment due to their balanced power output, high efficiency, and wide applicability.

[0003] In existing twin-cylinder compressor designs, the intake end mostly employs a single distributor structure. A distributor is typically used during compressor operation to distribute refrigerant gas from the system to each cylinder, ensuring the stability and balance of gas intake. This single distributor configuration can only effectively distribute gas and enable the twin-cylinder compressor to achieve the expected operating performance in conventional applications when both cylinders have equal displacement and operate under completely identical conditions.

[0004] However, as the application scenarios in the refrigeration and air conditioning industry become increasingly diversified and sophisticated, the single distributor structure has gradually revealed its inability to meet the demands of complex operating conditions. Firstly, in actual operation, the two cylinders of a twin-cylinder compressor often do not maintain identical operating states. On the one hand, the volumes of the two cylinders differ; on the other hand, even if the volumes are the same, the two cylinders need to undertake different compression tasks under different operating conditions, manifested in different requirements for the intake state, such as requiring gas input with different pressures, temperatures, or refrigerant characteristics. In this situation, a single distributor, lacking independent flow control capabilities, cannot differentiate its allocation according to the actual needs of each cylinder, resulting in at least one cylinder not operating in an ideal state, affecting the overall operating efficiency and stability of the compressor.

[0005] Furthermore, in the structural design of most twin-cylinder compressors, the distributor is usually located on one side of the cylinder. While this arrangement is relatively simple in structure, it can easily cause rotational imbalance of the compressor during operation, leading to increased unit vibration and noise. Long-term operation may even adversely affect the internal components of the compressor, shortening the equipment's lifespan. Moreover, as modern refrigeration and air conditioning equipment gradually develops towards miniaturization and compactness, traditional distributors are relatively large and have a simple structure, resulting in significant space occupation and hindering the overall optimization design of the system. Therefore, it is urgent to improve the distributor and related structures of multi-cylinder compressors with integrated composite distributors in order to break through the existing technical bottlenecks and improve the overall performance and adaptability of the compressor. Utility Model Content

[0006] This invention aims to solve at least one of the following problems existing in dual-temperature zone refrigeration or heat pump systems: uneven refrigerant distribution, inter-cylinder intake interference, large structural space occupation, and poor operational stability.

[0007] In view of this, the present invention provides a multi-cylinder compressor with an integrated composite distributor. By setting a distributor with two or more independent dispensing cavities inside the compressor, each cylinder can independently obtain refrigerant supply, avoiding mutual interference. Combined with a reasonable volume ratio design, the refrigerant can be accurately distributed, thereby improving suction efficiency and overall performance.

[0008] This application discloses a multi-cylinder compressor with an integrated compound liquid dispenser, including a housing, a motor, and a compression assembly disposed within the housing, comprising at least two compression chambers, and further including: A compound liquid dispenser, disposed inside the housing, includes at least two independent volume chambers; At least two inlet pipes, with each volume chamber independently connected to an inlet pipe, for receiving refrigerant from the system; There are at least two discharge pipes, each volume chamber is independently connected to a discharge pipe, and the other end of each discharge pipe is connected to the air intake of the compression chamber.

[0009] In some examples of this application, an upper flange, an upper cylinder, an intermediate partition, a lower cylinder, and a lower flange are provided inside the housing, wherein the upper flange, the upper cylinder, and the intermediate partition form a first compression cavity, and the intermediate partition, the lower cylinder, and the lower flange form a second compression cavity, and the first compression cavity and the second compression cavity have different volumes.

[0010] In some examples of this application, the two volume chambers in the composite dispenser are a first volume chamber and a second volume chamber, and the ratio of the volume of the first volume chamber to the volume of the second volume chamber ranges from 1 to 1.5.

[0011] In some examples of this application, the upper cylinder is connected to the first volume chamber, and the ratio of the volume of the first compression chamber to the volume of the first volume chamber is in the range of 8 to 15; the lower cylinder is connected to the second volume chamber, and the ratio of the volume of the second compression chamber to the volume of the second volume chamber is in the range of 8 to 15.

[0012] In some examples of this application, the first compression chamber and the second compression chamber independently draw in and exhaust air, and the first volume chamber and the second volume chamber are capable of receiving refrigerant in different states respectively.

[0013] In some examples of this application, the composite separator is located below the oil sump at the bottom of the housing.

[0014] In some examples of this application, the composite liquid separator is located along the axial direction of the housing, and the first volume chamber and the second volume chamber are arranged vertically side by side directly below the oil sump.

[0015] In some examples of this application, the end of the discharge pipe that communicates with the volume chamber is located near the middle or upper part of the volume chamber.

[0016] In some examples of this application, the discharge pipe is disposed inside the housing, or at least a portion of the structure of the discharge pipe is disposed outside the housing.

[0017] In some examples of this application, the multi-cylinder compressor of the integrated compound distributor is a dual-cylinder rotary compressor, which is applied to a dual-temperature zone refrigeration or heat pump system.

[0018] Compared with existing technologies, the multi-cylinder compressor with integrated composite liquid separator of this invention has the following advantages: 1. This application integrates a composite distributor inside the compressor housing, consisting of at least two independent volume chambers, each equipped with an independent inlet and outlet pipe. This enables precise refrigerant distribution and independent refrigerant supply, allowing different volume chambers to correspond to different cylinders. This effectively solves the problems of efficiency reduction and instability caused by refrigerant distribution interference between cylinders in traditional technologies. Each cylinder receives refrigerant matching its own operating state, ensuring the continuity and consistency of the compression process. Furthermore, by matching the internal volume ratio of the distributor with the cylinder volume, a balance is achieved between refrigerant supply and compression demand, avoiding performance fluctuations caused by excessive or insufficient refrigerant supply. This solution allows the compressor to handle refrigerant in different states simultaneously in a dual-temperature zone system, enabling precise temperature regulation in various scenarios such as home and commercial settings, improving user experience and system reliability.

[0019] 2. By tightly integrating the distributor with the compressor housing, this application not only saves system space and maintains the overall compactness of the equipment, but also reduces system vibration and noise during operation, thereby improving the long-term stability of the compressor.

[0020] 3. This application achieves multi-functional operation capability of multi-cylinder compressors under complex working conditions through the combined application of independent liquid separation, reasonable volume matching and integrated layout. It is particularly suitable for composite systems that require dual-temperature zone regulation or simultaneous compression of refrigerants in different states. This enables the compressor to maintain efficient and stable output while meeting diverse needs. It not only improves the overall energy efficiency of the compressor, but also enhances the operational flexibility and adaptability of the system, providing reliable core component support for multi-temperature zone systems, composite refrigeration systems and high-efficiency energy-saving heat pump systems. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a multi-cylinder compressor with an integrated composite liquid separator as described in this embodiment of the present invention; The markings in the diagram are as follows: 1-Housing; 2-Motor; 3-Crankshaft; 4-Upper flange; 5-Upper cylinder; 6-Intermediate partition; 7-Lower cylinder; 8-Lower flange; 9-First discharge pipe; 10-Second discharge pipe; 11-First volume chamber; 12-Second volume chamber; 13-First inlet pipe; 14-Second inlet pipe; 15-Oil sump. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0023] It should be noted that all directional and positional terms used in this utility model, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connection arrangements between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0024] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; 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 based on the specific circumstances.

[0025] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] like Figure 1 As shown, this application discloses a multi-cylinder compressor with an integrated compound liquid dispenser, including a housing 1, a motor 2, and a compression assembly disposed within the housing 1, comprising at least two compression chambers, and further including: A compound liquid dispenser is disposed inside the housing 1 and includes at least two independent volume chambers; At least two inlet pipes, with each volume chamber independently connected to an inlet pipe, for receiving refrigerant from the system; At least two discharge pipes are provided, with each volume chamber independently connected to a discharge pipe, and the other end of each discharge pipe is connected to the air intake of the compression chamber.

[0027] The multi-cylinder compressor with integrated composite distributor described in this application integrates a composite distributor inside the housing 1. The composite distributor consists of at least two independent volumetric chambers, each equipped with an independent inlet and outlet pipe, capable of connecting to an external system and connecting to the intake port of the corresponding compression chamber. When the motor 2 operates, driving the compression assembly, the crankshaft 3 in the compression assembly rotates, driving the various compression chambers inside the housing 1 to perform reciprocating compression actions through cooperation with vanes, rollers, and other components. At this time, refrigerant from the external system enters different volumetric chambers inside the composite distributor through at least two independent inlet pipes. This structure achieves differentiated refrigerant distribution, allowing each compression chamber to... By acquiring the appropriate refrigerant input according to different operating conditions, this design avoids the limitation of traditional single distributor structures that can only work stably when the displacement of the compression chamber is equal or the operating conditions are consistent. This design not only ensures that the multi-cylinder compressor with integrated composite distributor maintains stable operation in different application scenarios, but also achieves preliminary buffering and regulation of the refrigerant before it enters the compression chamber through the setting of an independent internal volume chamber. This helps to reduce the fluctuation and pulsation of refrigerant flow, making the compression process smoother. At the same time, the composite distributor is compactly arranged inside the housing 1, avoiding the problem of traditional external distributors occupying too much space. This makes the entire compressor more miniaturized and integrated, further improving the structural compactness and system design flexibility.

[0028] The multi-cylinder compressor with the integrated composite distributor described in this application uses an integrated composite distributor with two or more independent volume chambers that have a dispensing function. Each volume chamber independently supplies refrigerant to one compression chamber without affecting each other, so that each compression chamber can work independently, reducing the suction interference between compression chambers and improving the compressor output capacity.

[0029] As a preferred example of this application, an upper flange 4, an upper cylinder 5, a middle partition 6, a lower cylinder 7, and a lower flange 8 are provided inside the housing 1, wherein the upper flange 4, the upper cylinder 5, and the middle partition 6 form a first compression cavity, and the middle partition 6, the lower cylinder 7, and the lower flange 8 form a second compression cavity, and the first compression cavity and the second compression cavity have different volumes. In the example of this application, a first compression chamber and a second compression chamber are formed by setting an upper flange 4, an upper cylinder 5, a middle partition 6, a lower cylinder 7, and a lower flange 8 inside the housing 1. The two compression chambers have different volumes in structure, so they can undertake different compression tasks during operation. With the integrated composite distributor inside the housing 1, it can be ensured that the large-volume compression chamber receives more refrigerant, while the small-volume compression chamber receives relatively less refrigerant. Through the differentiated refrigerant supply method, the problem that the traditional single distributor cannot meet the refrigerant needs of different-volume compression chambers is effectively solved, so that each compression chamber can operate stably under conditions suitable for its own working conditions, thereby improving the overall operation stability and energy efficiency of the machine.

[0030] As a preferred example of this application, the two volume chambers within the composite distributor are a first volume chamber 11 and a second volume chamber 12, and the ratio of the volume of the first volume chamber 11 to the volume of the second volume chamber 12 ranges from 1 to 1.5. In this example, by limiting the volume ratio of the first volume chamber 11 to the second volume chamber 12 within the composite distributor to the range of 1 to 1.5, the multi-cylinder compressor with the integrated composite distributor can better adapt to the differentiated refrigerant supply requirements of different compression chambers during operation. When the volume of the compression chamber is large, the corresponding volume chamber can provide more refrigerant storage and adjustment space, while when the volume of the compression chamber is small, the corresponding volume chamber can avoid excessive refrigerant supply, which could lead to reduced energy efficiency or unstable operation. This ensures that each compression chamber operates under suitable refrigerant input conditions, significantly improving the overall stability and efficiency of the compressor.

[0031] As a preferred example of this application, the upper cylinder 5 is connected to the first volume chamber 11, and the ratio of the volume of the first compression chamber to the volume of the first volume chamber 11 ranges from 8 to 15. The lower cylinder 7 is connected to the second volume chamber 12, and the ratio of the volume of the second compression chamber to the volume of the second volume chamber 12 ranges from 8 to 15. In the example of this application, by limiting the volume ratios of the first compression chamber to the first volume chamber 11 and the second compression chamber to the second volume chamber 12 to between 8 and 15, each volume chamber and its corresponding compression chamber form a highly matched refrigerant supply mode, significantly improving the compressor's adaptability to refrigerant, ensuring that the compressor maintains a highly efficient and stable intake state during operation, and further improving overall operating performance.

[0032] As a preferred example of this application, the first volumetric cavity 11 and the second volumetric cavity 12 are capable of receiving refrigerant in different states. In the example of this application, the two inlet pipes are a first inlet pipe 13 and a second inlet pipe 14, respectively. The first inlet pipe 13 is provided on the first volumetric cavity 11, and the second inlet pipe 14 is provided on the second volumetric cavity 12. The refrigerant in the external system enters the first volumetric cavity 11 and the second volumetric cavity 12 through the independent first inlet pipe 13 and second inlet pipe 14, respectively. The two volumetric cavities are independent of each other. Therefore, when the compressor is running, it can receive and store refrigerant in different states at the same time, so that the compressor can maintain two different evaporation temperatures at the same time, thereby meeting the requirement of simultaneous operation of multiple temperature zones and enabling the system to more flexibly adapt to the dual-temperature zone control requirements in cooling and heating scenarios.

[0033] As a preferred example of this application, the composite distributor is disposed below the oil sump 15 at the bottom of the housing 1. In this example, by arranging the composite distributor below the oil sump 15 at the bottom of the housing 1, and ensuring that both volume chambers can simultaneously contact the oil sump 15, the first volume chamber 11 and the second volume chamber 12 within the distributor can exchange heat sufficiently with the oil sump 15 while storing the refrigerant. The oil sump 15 itself generates and maintains a certain temperature during compressor operation. When the refrigerant enters the volume chamber, it can promptly absorb heat from the oil sump, raising its temperature and converting it to a superheated state. This effectively avoids liquid refrigerant directly entering the compression cavity, which could cause liquid slugging or mechanical failure, ensuring the stability and reliability of the compressor during operation. Furthermore, the refrigerant being drawn in under superheated conditions improves the smoothness of the compression process, reduces pressure fluctuations at the suction end and pulsations in the refrigerant flow, thereby reducing vibration and noise during operation and extending the compressor's service life.

[0034] As a preferred example of this application, the composite distributor is located along the axial direction of the housing 1, and the first volume chamber 11 and the second volume chamber 12 are arranged vertically side by side directly below the oil sump 15. In this example, by arranging the composite distributor along the axial direction of the compressor body and placing the first volume chamber 11 and the second volume chamber 12 vertically side by side directly below the oil sump 15, the heat exchange efficiency between the refrigerant entering the volume chamber and the oil sump 15 is ensured, while also making the overall structural layout more compact. This reduces the uneven stress and operational imbalance problems that may be caused by the offset arrangement, enabling the compressor to maintain a stable working state during long-term operation. At the same time, this layout can better adapt to the overall structural requirements of multi-cylinder compressors with integrated composite distributors, making them more adaptable and reliable in various applications such as refrigeration systems, heat pump systems, and air conditioning systems.

[0035] As a preferred example of this application, the end of the discharge pipe communicating with the volume chamber is located near the middle or upper part of the volume chamber. In the example of this application, the two discharge pipes are a first discharge pipe 9 and a second discharge pipe 10. One end of the first discharge pipe 9 is connected to the first volume chamber 11, and the other end is connected to the upper cylinder 5. One end of the second discharge pipe 10 is connected to the second volume chamber 12, and the other end is connected to the lower cylinder 7. The end of the first discharge pipe 9 communicating with the first volume chamber 11 is located near the middle or upper part of the first volume chamber 11, and the end of the second discharge pipe 10 communicating with the second volume chamber 12 is located near the middle or upper part of the second volume chamber 12. Through the above configuration, the refrigerant undergoes a thorough gas-liquid separation process within the volumetric cavity before entering the cylinder. When the refrigerant supplied by the external system enters the lower part of the volumetric cavity through the inlet pipe, due to density differences, the liquid refrigerant settles at the bottom of the cavity, while the gaseous refrigerant gradually rises and accumulates in the middle and upper parts. When the connecting end of the discharge pipe is located in the middle or upper part, it preferentially absorbs the more stable gaseous refrigerant, thereby greatly reducing the possibility of liquid refrigerant being directly carried into the cylinder. This not only avoids direct impact and interference from liquid refrigerant on the cylinder but also effectively prevents mechanical damage caused by liquid compression, ensuring the reliability of core components such as the cylinder, piston, and crankshaft. Preferably, the connecting end of the second discharge pipe 10 and the second volumetric cavity 12 is positioned higher than the connecting end of the first discharge pipe 9 and the first volumetric cavity 11. This allows the amount and state of the refrigerant entering the upper and lower cylinders after separation by the compound separator to better match their respective compression requirements, improving intake efficiency and ensuring a stable and smooth compression process.

[0036] As a preferred example of this application, the discharge pipe is disposed inside the housing 1, or at least a portion of the structure of the discharge pipe is disposed outside the housing 1. In the example of this application, by disposing of the first discharge pipe 9 and the second discharge pipe 10 inside the housing 1, or by disposing of a portion of the structure of the first discharge pipe 9 and / or the second discharge pipe 10 outside the housing 1, the choice can be flexibly made according to different requirements of the overall structural layout of the compressor and the system connection method. This allows the refrigerant to maintain a stable delivery state during the process of entering the compression cavity from the volume chamber. When the discharge pipe is located inside the housing 1, the overall structure of the compressor is more compact, the number of external pipelines is reduced, and the heat loss and pressure loss of the refrigerant are lower during the delivery process due to the shortened path. This allows the refrigerant to enter the compression cavity with higher efficiency, improving the compressor's energy efficiency and operational stability. When a portion of the structure of the discharge pipe is located outside the housing 1, it facilitates installation, inspection, and maintenance. The pipeline routing can be flexibly adjusted according to different requirements of the system layout, ensuring that the refrigerant can still be smoothly delivered to the compression cavity under various complex installation conditions.

[0037] As a preferred example of this application, the multi-cylinder compressor with integrated composite distributor is a dual-cylinder rotary compressor, applied to dual-temperature zone refrigeration or heat pump systems. The multi-cylinder compressor with integrated composite distributor disclosed in this application particularly relates to a dual-cylinder rotary compressor. By integrating a composite distributor with two or more independent dispensing cavities into the compressor, each cylinder can independently receive refrigerant supply without interference. This fundamentally solves the performance degradation problem caused by inter-cylinder intake interference in traditional structures, ensuring the stability and efficiency of independent operation of each compression chamber. Furthermore, through rational design of the matching relationship between each volume chamber within the distributor and the cylinder displacement, parameterized design of the refrigerant supply, cylinder volume, and distributor volume is achieved. This not only meets the needs of simultaneous compression of refrigerants in different states under different operating conditions but also meets the compression requirements of different inlet pressures or different refrigerant types. This significantly enhances the compressor's adaptability and application range. The composite distributor not only provides dual-temperature regulation for the system, improving the accuracy and efficiency of refrigeration or heat pump systems operating in multiple temperature zones, but also saves installation space through its integrated structure, reducing energy loss and assembly complexity caused by additional piping and components. Simultaneously, it reduces vibration and noise caused by rotational imbalance, extends equipment life, and further improves the user experience. The system achieves higher energy efficiency and a longer service life while maintaining a compact structure. It demonstrates significant advantages in residential or commercial dual-temperature zone applications and provides a reliable solution for complex systems that need to handle refrigerants in different states simultaneously, expanding the compressor's application range.

[0038] The multi-cylinder compressor with integrated composite distributor described in this application improves refrigerant distribution accuracy, compressor suction efficiency, and overall energy efficiency by combining and optimizing independent liquid supply, reasonable volume ratio, and integrated layout. It also takes into account structural compactness and system stability. This makes the multi-cylinder compressor with integrated composite distributor described in this application more reliable and adaptable in complex scenarios such as composite systems, multi-temperature zone systems, and even those that need to handle refrigerants in different states simultaneously.

[0039] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A multi-cylinder compressor with an integrated compound liquid separator, comprising a housing (1), a motor (2), and a compression assembly disposed within the housing (1) including at least two compression chambers, characterized in that, Also includes: A compound liquid dispenser is disposed inside the housing (1) and includes at least two independent volume chambers; At least two inlet pipes, with each volume chamber independently connected to an inlet pipe, for receiving refrigerant from the system; There are at least two discharge pipes, each volume chamber is independently connected to a discharge pipe, and the other end of each discharge pipe is connected to the air intake of the compression chamber.

2. The multi-cylinder compressor with integrated composite liquid distributor according to claim 1, characterized in that, An upper flange (4), an upper cylinder (5), a middle partition plate (6), a lower cylinder (7), and a lower flange (8) are provided inside the housing (1). The upper flange (4), the upper cylinder (5), and the middle partition plate (6) form a first compression cavity, and the middle partition plate (6), the lower cylinder (7), and the lower flange (8) form a second compression cavity. The volumes of the first compression cavity and the second compression cavity are different.

3. The multi-cylinder compressor with integrated composite liquid distributor according to claim 2, characterized in that, The two volume chambers in the composite liquid dispenser are a first volume chamber (11) and a second volume chamber (12), and the ratio of the volume of the first volume chamber (11) to the volume of the second volume chamber (12) is in the range of 1 to 1.

5.

4. The multi-cylinder compressor with integrated composite liquid distributor according to claim 3, characterized in that, The upper cylinder (5) is connected to the first volume chamber (11), and the ratio of the volume of the first compression chamber to the volume of the first volume chamber (11) is in the range of 8 to 15. The lower cylinder (7) is connected to the second volume chamber (12), and the ratio of the volume of the second compression chamber to the volume of the second volume chamber (12) is in the range of 8 to 15.

5. The multi-cylinder compressor with integrated composite liquid separator according to claim 4, characterized in that, The first compression chamber and the second compression chamber independently draw in and exhaust air, and the first volume chamber (11) and the second volume chamber (12) can receive refrigerant in different states respectively.

6. The multi-cylinder compressor with the integrated composite liquid separator according to any one of claims 1 to 5, characterized in that, The composite separator is located below the oil pool (15) at the bottom of the housing (1).

7. The multi-cylinder compressor with integrated composite liquid distributor according to claim 6, characterized in that, The composite liquid separator is located on the axial direction of the housing (1), and the first volume chamber (11) and the second volume chamber (12) of the composite liquid separator are arranged vertically side by side directly below the oil tank (15).

8. The multi-cylinder compressor with the integrated composite liquid distributor according to claim 1 or 7, characterized in that, The end of the discharge pipe that communicates with the volume chamber is located near the middle or upper part of the volume chamber.

9. The multi-cylinder compressor with integrated composite liquid separator according to claim 8, characterized in that, The discharge pipe is disposed inside the housing (1), or at least a portion of the structure of the discharge pipe is disposed outside the housing (1).

10. The multi-cylinder compressor with the integrated composite distributor according to claim 1 or 9, characterized in that, The multi-cylinder compressor of the integrated composite liquid separator is a dual-cylinder rotary compressor, which is used in dual-temperature zone refrigeration or heat pump systems.

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