Compressor and air conditioning unit

Abstract

This invention provides a compressor and an air conditioning unit. The compressor includes a housing; a low-pressure stage compression assembly disposed within the housing and connected to a power mechanism; and a high-pressure stage compression assembly connected to the low-pressure stage compression assembly via a clutch mechanism. The compressor and air conditioning unit provided by this invention, by providing a clutch mechanism between the low-pressure stage compression assembly and the high-pressure stage compression assembly, allow the high-pressure stage compression assembly to stop working while the low-pressure stage compression assembly continues to work to perform primary compression of the gas, achieving a low-pressure ratio output. At this time, there is no gas flow inside the high-pressure stage compression assembly, thereby reducing the energy consumption of the airflow pumping process and mechanical friction. This effectively avoids the problem of high energy consumption caused by two pairs of rotors constantly rotating in existing compressors, thus improving the compressor's working efficiency.

Description

Technical Field

[0001] This invention relates to the field of compression equipment technology, and in particular to a compressor and air conditioning unit. Background Technology

[0002] A single-unit two-stage compressor consists of two pairs of rotors connected in series within a single housing. The gas to be compressed enters, compresses, and exits through the first-stage (low-pressure) rotor pair, and then enters, compresses, and exits through the second-stage (high-pressure) rotor pair, completing two stages of compression, i.e., two-stage compression. This series-relay compression process can meet the requirements of high pressure ratio operating conditions. The industry typically uses single-unit two-stage compressors, with added logic control within the compressor or system to switch between single-stage and two-stage compression, meeting the needs of different pressure ratio operating conditions.

[0003] However, in existing single-stage and two-stage compressors, in order to ensure that the single-stage compressor can perform two-stage compression, both pairs of rotors are connected to the motor. The gas source of the high-pressure stage rotor is then controlled to regulate the compressor. For example, the exhaust gas from the low-pressure stage rotor can be discharged directly without flowing through the high-pressure stage rotor to achieve single-stage compression. However, in this process, although the high-pressure stage rotor does not compress the gas, it is always rotating. The internal airflow pumping process and mechanical friction still occur, both of which consume compressor power and increase compressor energy consumption. Summary of the Invention

[0004] In order to solve the technical problem of high energy consumption of compressors in the prior art, a compressor and air conditioning unit are provided that use a clutch mechanism to stop the high-pressure stage compression component from working and rotating, thereby reducing energy consumption.

[0005] A compressor, comprising:

[0006] case;

[0007] A low-pressure stage compression assembly is disposed within the housing and is connected to a power mechanism.

[0008] A high-pressure stage compression assembly, which is connected to the low-pressure stage compression assembly via a clutch mechanism;

[0009] The compressor has a single-stage compression mode and a two-stage compression mode;

[0010] When the compressor is in single-stage compression mode, the clutch mechanism switches to the disengaged state;

[0011] When the compressor is in two-stage compression mode, the clutch mechanism switches to the engaged state.

[0012] The clutch mechanism includes two engagement structures. One engagement structure is disposed on the low-pressure stage compression assembly, and the other engagement structure is disposed on the high-pressure stage compression assembly. When the clutch mechanism is in the disengaged state, the two engagement structures are disengaged from each other, and when the clutch mechanism is in the engaged state, the two engagement structures are connected to each other.

[0013] The compressor also includes a drive mechanism connected to the clutch mechanism, and the drive mechanism is capable of driving the clutch mechanism to switch between the disengaged state and the engaged state.

[0014] The high-pressure stage compression assembly is provided with a pressure channel, and one of the coupling structures is movably disposed within the pressure channel, and the coupling structure can protrude from the pressure channel to connect with another coupling structure.

[0015] The pressure channel has a first connection port and a second connection port, the connecting structure is located between the first connection port and the second connection port, and the first connection port is directly or indirectly connected to the condenser in the refrigerant heat exchange cycle where the compressor is located, and the second connection port is connected to the exhaust of the low-pressure stage compression assembly.

[0016] The portion of the pressure channel near the low-pressure stage compression assembly forms a cylinder, the engagement structure is movably disposed within the cylinder, and the cross-sectional area of ​​the cylinder is larger than the cross-sectional area of ​​the pressure channel.

[0017] The low-pressure stage compression assembly includes a low-pressure stage active rotor, the high-pressure stage compression assembly includes a high-pressure stage active rotor, one of the coupling structures is disposed on the low-pressure stage active rotor, and the other of the coupling structures is disposed on the high-pressure stage active rotor.

[0018] The central axis of the low-pressure stage active rotor and the central axis of the high-pressure stage active rotor are collinear, and there is a gap between the two active rotors, with both of the joint structures located within the gap.

[0019] The two joint structures include a high-pressure stage joint structure and a low-pressure stage joint structure. The gap is formed between the first end of the low-pressure stage active rotor and the second end of the high-pressure stage active rotor. The high-pressure stage joint structure can protrude from the high-pressure stage active rotor through the second end of the high-pressure stage active rotor. The low-pressure stage joint structure is disposed on the first end of the low-pressure stage active rotor.

[0020] A connecting groove is provided on the first end of the low-pressure stage active rotor, and the connecting groove constitutes the low-pressure stage joint structure. A connecting protrusion is provided on the high-pressure stage joint structure, and the connecting protrusion can engage with the connecting groove; or, a connecting protrusion is provided on the first end of the low-pressure stage active rotor, and the connecting protrusion constitutes the low-pressure stage joint structure. A connecting groove is provided on the high-pressure stage joint structure, and the connecting groove can engage with the connecting protrusion.

[0021] The housing is provided with a low-pressure exhaust port, a high-pressure exhaust port and an intake port. The intake port and the low-pressure exhaust port are both connected to the low-pressure stage compression assembly, and the high-pressure exhaust port is connected to the high-pressure stage compression assembly.

[0022] An air conditioning unit includes the compressor described above.

[0023] The compressor and air conditioning unit provided by this invention, by setting a clutch mechanism between the low-pressure stage compression assembly and the high-pressure stage compression assembly, allows the clutch mechanism to switch to the engaged state when the compressor requires a high-pressure ratio output, enabling both the low-pressure and high-pressure stage compression assemblies to operate. This allows for two-stage compression of the gas, achieving a high-pressure ratio output. Conversely, when the compressor requires a low-pressure ratio output, the clutch mechanism switches to the disengaged state to disconnect the power source from the high-pressure stage compression assembly, causing it to stop operating. The low-pressure stage compression assembly, however, continues to operate, performing a single-stage compression of the gas to achieve a low-pressure ratio output. In this case, there is no gas flow inside the high-pressure stage compression assembly, thereby reducing energy consumption during the airflow pumping process and mechanical friction. This effectively avoids the problem of high energy consumption caused by two pairs of rotors constantly rotating in existing compressors, thus improving the compressor's operating efficiency. Attached Figure Description

[0024] Figure 1 A cross-sectional view of a compressor provided in an embodiment of the present invention;

[0025] Figure 2 Another cross-sectional view of the compressor provided in an embodiment of the present invention;

[0026] Figure 3 This is a partial cross-sectional view of a high-pressure stage compression assembly provided in an embodiment of the present invention;

[0027] Figure 4 A cross-sectional view of the compressor in the disengaged state according to an embodiment of the present invention;

[0028] Figure 5 A cross-sectional view of the compressor clutch mechanism in the engaged state according to an embodiment of the present invention;

[0029] Figure 6A cross-sectional view of the high-voltage stage active rotor provided in an embodiment of the present invention;

[0030] Figure 7 A cross-sectional view of the second end of the high-voltage stage active rotor and the high-voltage stage joint structure provided in an embodiment of the present invention;

[0031] Figure 8 A cross-sectional view of the low-pressure stage active rotor provided in an embodiment of the present invention;

[0032] Figure 9 A cross-sectional view of the first end of the low-pressure stage active rotor and the low-pressure stage joint structure provided in an embodiment of the present invention;

[0033] In the picture:

[0034] 1. Housing; 2. Low-pressure stage compression assembly; 3. High-pressure stage compression assembly; 41. Pressure channel; 42. First connecting port; 43. Second connecting port; 44. Cylinder; 21. Low-pressure stage active rotor; 31. High-pressure stage active rotor; 51. Connecting groove; 52. High-pressure stage engagement structure; 53. Connecting protrusion. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the protection scope of the present invention.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" 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 direct connection, an indirect connection through an intermediate medium, or a connection within 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] In existing single-stage and two-stage compressors, to ensure two-stage compression, both pairs of rotors are connected to a motor. The gas source for the high-pressure stage rotor is controlled, for example, the exhaust from the low-pressure stage rotor can be discharged directly without flowing through the high-pressure stage rotor to achieve single-stage compression. However, although the high-pressure stage rotor does not compress the gas, it is constantly rotating, and internal airflow pumping and mechanical friction still occur, both of which consume compressor power and increase energy consumption. Existing technologies generally use externally controlled valve blocks, utilizing the movement of the valve blocks at corresponding positions to control the high-pressure stage. The inlet state of the high-pressure stage rotor pair is adjusted. When the high-pressure stage rotor pair needs to work, the valve block moves to the first position, allowing the exhaust gas from the low-pressure stage rotor pair to enter the high-pressure stage rotor pair for secondary compression, achieving a high-pressure ratio output from the compressor. When the high-pressure stage rotor pair does not need to work, the valve block moves to the second position, sealing the inlet of the high-pressure stage rotor pair and allowing the exhaust gas from the low-pressure stage rotor pair to be discharged directly, achieving a low-pressure ratio output from the compressor. In this case, the high-pressure stage rotor pair remains directly or indirectly connected to the power source (such as the output shaft of a motor), meaning it is always rotating. Internal airflow pumping and mechanical friction still occur, both of which consume compressor power and increase energy consumption. Therefore, this application provides a... Figures 1 to 9The compressor shown includes: a housing 1; a low-pressure stage compression assembly 2, which is disposed within the housing 1 and connected to a power mechanism; and a high-pressure stage compression assembly 3, which is connected to the low-pressure stage compression assembly 2 via a clutch mechanism. The compressor has a single-stage compression mode and a two-stage compression mode. When the compressor is in single-stage compression mode, the clutch mechanism is switched to an open state; when the compressor is in two-stage compression mode, the clutch mechanism is switched to an engaged state. By setting a clutch mechanism between the low-pressure stage compression assembly 2 and the high-pressure stage compression assembly 3, when the compressor requires a high-pressure ratio output, the clutch mechanism switches to the engaged state, allowing both the low-pressure stage compression assembly 2 and the high-pressure stage compression assembly 3 to operate, thereby enabling two-stage compression of the gas to achieve a high-pressure ratio output. When the compressor requires a low-pressure ratio output, the clutch mechanism switches to the disengaged state to disconnect the power source of the high-pressure stage compression assembly 3, causing the high-pressure stage compression assembly 3 to stop working, while the low-pressure stage compression assembly 2 continues to operate to perform primary compression of the gas to achieve a low-pressure ratio output. At this time, there is no gas flow inside the high-pressure stage compression assembly 3, thereby reducing the energy consumption of the gas pumping process and mechanical friction, effectively avoiding the problem of high energy consumption caused by the two pairs of rotors in the compressor always being in a rotating state in the prior art, and improving the working efficiency of the compressor. The clutch mechanism includes two engaging structures. One engaging structure is disposed on the low-pressure stage compression assembly 2, and the other engaging structure is disposed on the high-pressure stage compression assembly 3. When the clutch mechanism is in the disengaged state, the two engaging structures are disengaged from each other. When the clutch mechanism is in the engaged state, the two engaging structures are connected to each other. When the clutch mechanism is in the disengaged state, the two engaging structures are disengaged from each other, with one engaging structure being farther away from the other, creating a certain distance between them. This distance is used to disconnect power from the low-pressure stage compression assembly 2, causing the high-pressure stage compression assembly 3 to stop working. When the clutch mechanism is in the engaged state, the two engaging structures are connected to each other, approaching each other and eventually connecting, ensuring that power can be transmitted through the two engaging structures. This ensures reliable power transmission between the high-pressure stage compression assembly 3 and the low-pressure stage compression assembly 2. The power mechanism can transmit power to the high-pressure stage compression assembly 3 through the low-pressure stage compression assembly 2 and the two engaging structures, ensuring reliable switching between single-stage and two-stage compression of the compressor. The power mechanism can be a motor structure inside the housing 1, or an external motor structure located outside the housing 1 and connected to the low-pressure stage compression assembly through an output shaft.

[0041] To achieve reliable switching of the clutch mechanism's state, the compressor also includes a drive mechanism connected to the clutch mechanism, which can drive the clutch mechanism to switch between the disengaged and engaged states. The drive mechanism can control the clutch mechanism's operation as needed, thereby controlling the compressor to perform single-stage or two-stage compression. During single-stage compression, since the clutch mechanism is in the disengaged state, there is no power transmission between the high-pressure stage compression assembly 3 and the low-pressure stage compression assembly 2, and the disengaged compression assembly stops working. When switching from single-stage compression to two-stage compression, the drive mechanism controls the clutch mechanism to engage the high-pressure stage compression assembly 3 and the low-pressure stage compression assembly 2, allowing power to be transmitted simultaneously to both. This process enables the compressor to switch between single-stage and two-stage compression. As one embodiment, the high-pressure stage compression assembly 3 is provided with a pressure channel 41, and one engagement structure is movably disposed within the pressure channel 41, protruding from the pressure channel 41 to connect with another engagement structure. The pressure channel 41 provides a pressure working medium to the joint structure, and the pressure working medium drives the joint structure to move, thereby realizing the connection or separation between the two joint structures.

[0042] The compressor's suction pressure is entirely dependent on and corresponds to the evaporation pressure of the air conditioning unit where it resides. The compressor's discharge pressure, however, depends on both the suction pressure and the compression ratio, requiring different compression ratios to match the unit's condensing pressure. Within the air conditioning unit, the unit first determines the evaporation and condensing pressures based on real-time operating conditions. This can be achieved through calculations using a set of evaporation / condensation temperatures. The compressor's suction and discharge pressures must correspond accordingly to ensure efficient operation. The suction and discharge pressure adjustment range of a single-stage compressor is limited. In a two-stage series configuration, the ratio of the compressor's total high and low pressures is the product of the pressure ratios of the two single stages. Therefore, when the air conditioning unit's evaporation / condensation pressure has a high pressure ratio, a higher compressor pressure ratio is required, which two-stage compression satisfies. Conversely, when the air conditioning unit's evaporation / condensation pressure has a low pressure ratio, with a fixed evaporation and suction pressure, the discharge pressure from the two-stage compressor will be significantly higher than the condensing pressure, while the discharge pressure from the low-pressure stage compression assembly 2 is more suited to the current condensing pressure. To ensure the compressor can automatically adjust according to the pressure ratio of the air conditioning unit, the pressure channel 41 has a first connecting port 42 and a second connecting port 43. The connecting structure is located between the first connecting port 42 and the second connecting port 43. The first connecting port 42 is directly or indirectly connected to the condenser in the refrigerant heat exchange cycle where the compressor is located, and the second connecting port 43 is connected to the exhaust of the low-pressure stage compression assembly 2. The condensing pressure in the air conditioning unit where the compressor is located is connected to the pressure channel 41, so that the first side of the connecting structure is the condensing pressure of the air conditioning unit, and the other side obtains the exhaust pressure of the low-pressure stage compression assembly 2 through the second connecting port 43. When the condensing pressure of the air conditioning unit is greater than the exhaust pressure of the low-pressure stage compression assembly 2, the connecting structure is pushed closer to the other connecting structure and finally realizes the clutch mechanism switching to the engaged state, thereby enabling the high-pressure stage compression assembly 3 to obtain power and start working, realizing two-stage compression of the gas, so that the exhaust pressure of the compressor can match the condensing pressure of the air conditioning unit, ensuring the working efficiency of the compressor and the air conditioning unit. When the condensing pressure of the air conditioning unit is not greater than that of the low-pressure stage compression component 2, the connecting structure will be pushed away from the other connecting structure, thereby disconnecting the two connecting structures and switching the clutch mechanism to the disengaged state. The high-pressure stage compression component 3 will not receive power and will stop working. Only the low-pressure stage compression component 2 will perform primary compression on the gas, so that the exhaust pressure of the compressor can match the condensing pressure of the air conditioning unit, ensuring the working efficiency of the compressor and the air conditioning unit.

[0043] To prevent frequent disconnections between the connecting structure within the pressure channel 41 and another connecting structure, a cylinder 44 is formed near the low-pressure stage compression assembly 2. The connecting structure is movably disposed within the cylinder 44, and the cross-sectional area of ​​the cylinder 44 is larger than that of the pressure channel 41. The cross-sectional area of ​​the connecting structure is equal to that of the cylinder 44, ensuring a reliable seal between them. Because the cross-sectional area of ​​the cylinder 44 is larger than that of the pressure channel 41, when the connecting structure is pressed against the bottom surface of the cylinder 44 by the exhaust pressure of the low-pressure stage compression assembly 2, the area of ​​the pressure exerted on the connecting structure by the pressure in the pressure channel 41 is only the cross-sectional area of ​​the pressure channel 41. Meanwhile, the exhaust pressure from the low-pressure stage compression assembly 2 flows into the cylinder 44, and the area of ​​the exhaust pressure exerted on the connecting structure is equal to the cross-sectional area of ​​the cylinder 44. When pressure fluctuations occur within the pressure channel 41, the connecting structure will not move due to the different sizes of the areas of action, thus preventing continuous disconnections between the connecting structure and another connecting structure. The frequent switching of the compressor's compression ratio due to the opening and closing of the joint structure, and the sudden increase in torque at the connection point between the high-pressure stage compression assembly 3 and the low-pressure stage compression assembly 2 during engagement, can damage the power mechanism and the connection points, severely impacting compressor reliability. Therefore, by utilizing a cylinder 44 with a cross-sectional area larger than the pressure channel 41, the joint structure can withstand certain pressure fluctuations, ensuring compressor reliability. When the pressure in the pressure channel 41 exceeds the discharge pressure of the low-pressure stage compression assembly 2, the joint structure is compressed to the opening of the cylinder 44. At this point, pressurized gas from the pressure channel 41 flows into the cylinder 44. The area of ​​the pressure acting on the joint structure is equal to the cross-sectional area of ​​the cylinder 44, increasing the compression force on the joint structure and preventing pressure fluctuations in the pressure channel 41 from affecting the engagement effect, thus ensuring compressor reliability. Only when the pressure value in the pressure channel 41 rises to a certain level can the connecting structure engage with another connecting structure to start the high-pressure stage compression assembly 3. Similarly, only when the pressure value in the pressure channel 41 drops to a certain level can the connecting structure disengage from the other connecting structure to disconnect the high-pressure stage compression assembly 3. This avoids frequent start-stop of the high-pressure stage compression assembly 3 and ensures stable compressor operation. Preferably, the cross-sectional area of ​​the cylinder 44 is 1.05 to 1.2 times the cross-sectional area of ​​the pressure channel 41.When the cross-sectional area of ​​cylinder 44 is too large, it will occupy too much space in the compressor's internal space (especially the high-pressure stage compression assembly 3), affecting the compressor's efficiency. When the cross-sectional area of ​​cylinder 44 is too small, the effect of offsetting pressure fluctuations in the pressure channel 41 is weak, and the reliability of the compressor cannot be guaranteed.

[0044] In one embodiment, the low-pressure stage compression assembly 2 includes a low-pressure stage active rotor 21, and the high-pressure stage compression assembly 3 includes a high-pressure stage active rotor 31. Both the low-pressure stage compression assembly 2 and the high-pressure stage compression assembly 3 are rotor pairs. The active rotor receives power and drives the passive rotor to rotate together, thereby compressing the gas. One of the connecting structures is disposed on the low-pressure stage active rotor 21, and the other connecting structure is disposed on the high-pressure stage active rotor 31, ensuring that the power from the power mechanism can be smoothly transmitted to the high-pressure stage active rotor 31, guaranteeing the reliable operation of the high-pressure stage compression assembly 3. The central axes of the low-pressure stage active rotor 21 and the high-pressure stage active rotor 31 are collinear, and there is a gap between the two active rotors. Both connecting structures are located within this gap. The two connecting structures only need to move along the axial direction of the central axis of the low-pressure stage active rotor 21, ensuring reliable engagement of the two connecting structures. Specifically, the two engagement structures include a high-pressure stage engagement structure 52 and a low-pressure stage engagement structure. The gap is formed between the first end of the low-pressure stage active rotor 21 and the second end of the high-pressure stage active rotor 31. A pressure channel 41 is formed on the high-pressure stage active rotor 31, and a cylinder 44 is formed at the second end of the high-pressure stage active rotor 31. The high-pressure stage engagement structure 52 can protrude from the second end of the high-pressure stage active rotor 31, and the low-pressure stage engagement structure is disposed on the first end of the low-pressure stage active rotor 21. In this case, only the high-pressure stage engagement structure 52 needs to move along the central axis of the high-pressure stage active rotor 31, reducing the number of moving parts in the clutch mechanism and thus improving the structural reliability of the clutch mechanism.

[0045] To further reduce the structural complexity of the clutch mechanism, a connecting groove 51 is provided on the first end of the low-pressure stage active rotor 21. The connecting groove 51 constitutes the low-pressure stage engagement structure, and a connecting protrusion 53 is provided on the high-pressure stage engagement structure 52. The connecting protrusion 53 can engage with the connecting groove 51. When the clutch mechanism switches from the disengaged state to the engaged state, the connecting protrusion 53 on the high-pressure stage engagement structure 52 extends into the corresponding connecting groove 51. Preferably, the connecting protrusion 53 is arranged in a ring around the central axis of the high-pressure stage active rotor 31, and the connecting groove 51 is also arranged in a ring around the central axis of the high-pressure stage active rotor 31. At this time, no matter where the low-pressure stage active rotor 21 rotates, the connecting protrusion 53 can connect to the nearest connecting groove 51, thereby improving the response speed and engagement reliability of the clutch mechanism. When the clutch mechanism switches to the disengaged state, it is only necessary to move the high-pressure stage engagement structure 52 away from the low-pressure stage engagement structure, so that the connecting protrusion 53 disengages from the connecting groove 51. As shown in the figure, a flat-topped wedge is formed on the high-pressure stage joint structure 52, while a pointed groove is provided at the first end of the low-pressure stage active rotor 21. When the flat-topped wedge contacts the first end of the low-pressure stage active rotor 21 but does not enter the pointed groove, the plane of the flat-topped wedge rubs against the first end face of the low-pressure stage active rotor 21, forming a surface-to-surface contact friction, which avoids damage to the low-pressure stage active rotor 21 and improves the reliability of the compressor.

[0046] Alternatively, a connecting protrusion 53 may be provided on the first end of the low-pressure stage active rotor 21. The connecting protrusion 53 constitutes the low-pressure stage engagement structure, and a connecting groove 51 may be provided on the high-pressure stage engagement structure 52. The connecting groove 51 can engage with the connecting protrusion 53. When the clutch mechanism switches from the disengaged state to the engaged state, the connecting protrusion 53 on the low-pressure stage active rotor 21 can extend into the corresponding connecting groove 51. Preferably, the connecting protrusion 53 is arranged in a ring around the central axis of the high-pressure stage active rotor 31, and the connecting groove 51 is also arranged in a ring around the central axis of the high-pressure stage active rotor 31. In this case, no matter where the low-pressure stage active rotor 21 rotates, the connecting protrusion 53 can connect to the nearest connecting groove 51, thereby improving the response speed and engagement reliability of the clutch mechanism.

[0047] The housing 1 is provided with a low-pressure exhaust port, a high-pressure exhaust port, and an intake port. Both the intake port and the low-pressure exhaust port are connected to the low-pressure stage compression assembly 2, and the high-pressure exhaust port is connected to the high-pressure stage compression assembly 3. When the compressor is working, it draws in gas through the intake port and directly sends it into the low-pressure stage compression assembly 2 for compression, then delivers it to the housing 1 where the low-pressure exhaust port is located. When the low-pressure exhaust port is closed, the exhaust gas from the low-pressure stage compression assembly 2 flows into the high-pressure stage compression assembly 3 for secondary compression, and is finally discharged through the high-pressure exhaust port. At this time, the compressor outputs a higher pressure ratio. When the low-pressure exhaust port is open, the high-pressure stage compression assembly 3 is disconnected from the low-pressure stage compression assembly 2, and the exhaust gas from the low-pressure stage compression assembly 2 is directly discharged through the low-pressure exhaust port. At this time, the compressor outputs a lower pressure ratio. Preferably, the low-pressure exhaust port and the high-pressure exhaust port are connected to the same exhaust pipe, allowing the compressor to output exhaust gas through the same exhaust pipe in both single-stage and two-stage compression without switching exhaust pipes.

[0048] An air conditioning unit includes the compressor described above.

[0049] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A compressor, characterized in that: include: Shell (1); Low-pressure stage compression assembly (2), the low-pressure stage compression assembly (2) is disposed inside the housing (1), and the low-pressure stage compression assembly (2) is connected to the power mechanism; A high-pressure stage compression assembly (3) is connected to the low-pressure stage compression assembly (2) via a clutch mechanism; The compressor has a single-stage compression mode and a two-stage compression mode; When the compressor is in single-stage compression mode, the clutch mechanism switches to the disengaged state; When the compressor is in two-stage compression mode, the clutch mechanism switches to the engaged state; The clutch mechanism includes two engagement structures. One engagement structure is disposed on the low-pressure stage compression assembly (2), and the other engagement structure is disposed on the high-pressure stage compression assembly (3). When the clutch mechanism is in the disengaged state, the two engagement structures are disengaged from each other, and when the clutch mechanism is in the engaged state, the two engagement structures are connected to each other. The compressor further includes a drive mechanism, which is connected to the clutch mechanism and is capable of driving the clutch mechanism to switch between the disengaged state and the engaged state. The high-pressure stage compression assembly (3) is provided with a pressure channel (41), and one of the connecting structures is movably disposed in the pressure channel (41), and the connecting structure can protrude from the pressure channel (41) to connect with another connecting structure. The pressure channel (41) has a first connection port (42) and a second connection port (43) opposite to each other. The connecting structure is located between the first connection port (42) and the second connection port (43). The first connection port (42) is directly or indirectly connected to the condenser in the refrigerant heat exchange cycle where the compressor is located, and the second connection port (43) is connected to the exhaust of the low-pressure stage compression assembly (2).

2. The compressor according to claim 1, characterized in that: The portion of the pressure channel (41) near the low-pressure stage compression assembly (2) forms a cylinder (44), the engagement structure is movably disposed within the cylinder (44), and the cross-sectional area of ​​the cylinder (44) is greater than the cross-sectional area of ​​the pressure channel (41).

3. The compressor according to claim 1, characterized in that: The low-pressure stage compression assembly (2) includes a low-pressure stage active rotor (21), and the high-pressure stage compression assembly (3) includes a high-pressure stage active rotor (31). One of the coupling structures is disposed on the low-pressure stage active rotor (21), and the other of the coupling structures is disposed on the high-pressure stage active rotor (31).

4. The compressor according to claim 3, characterized in that: The central axis of the low-pressure stage active rotor (21) and the central axis of the high-pressure stage active rotor (31) are collinear, and there is a gap between the two active rotors, and both of the joint structures are located within the gap.

5. The compressor according to claim 4, characterized in that: The two joint structures include a high-pressure stage joint structure (52) and a low-pressure stage joint structure, wherein the gap is formed between the first end of the low-pressure stage active rotor (21) and the second end of the high-pressure stage active rotor (31), the high-pressure stage joint structure (52) can protrude from the high-pressure stage active rotor (31) through the second end of the high-pressure stage active rotor (31), and the low-pressure stage joint structure is disposed on the first end of the low-pressure stage active rotor (21).

6. The compressor according to claim 5, characterized in that: A connecting groove (51) is provided on the first end of the low-pressure stage active rotor (21), the connecting groove (51) constitutes the low-pressure stage joint structure, and a connecting protrusion (53) is provided on the high-pressure stage joint structure (52), the connecting protrusion (53) can engage with the connecting groove (51); or, a connecting protrusion (53) is provided on the first end of the low-pressure stage active rotor (21), the connecting protrusion (53) constitutes the low-pressure stage joint structure, and a connecting groove (51) is provided on the high-pressure stage joint structure (52), the connecting groove (51) can engage with the connecting protrusion (53).

7. The compressor according to claim 1, characterized in that: The housing (1) is provided with a low-pressure exhaust port, a high-pressure exhaust port and an intake port. The intake port and the low-pressure exhaust port are both connected to the low-pressure stage compression assembly (2), and the high-pressure exhaust port is connected to the high-pressure stage compression assembly (3).

8. An air conditioning unit, characterized in that: The compressor includes any one of claims 1 to 7.

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