Compressor and air conditioning system

Abstract

The application discloses a compressor and an air conditioning system. The compressor comprises a shell provided with an exhaust port; a first compression part arranged in the shell and provided with a first suction port; a second compression part arranged in the shell and provided with a second suction port and arranged along a vertical direction with the first compression part; a locking mechanism arranged in the shell and provided with a first state of preventing the second compression part from compressing refrigerant and a second state of allowing the second compression part to compress refrigerant, the locking mechanism being provided with an air inlet for introducing refrigerant for controlling the locking mechanism to switch between the first state and the second state; a first flow path connecting the air inlet and the first suction port, and at least a section of the first flow path close to the first suction port being arranged in the shell; or the first flow path connecting the air inlet and the second suction port, and at least a section of the first flow path close to the second suction port being arranged in the shell.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, and more specifically, to a compressor and an air conditioning system. Background Technology

[0002] Variable frequency and variable capacity technology can dynamically adjust the compressor frequency and displacement, enabling it to adjust its output according to load requirements.

[0003] In existing variable frequency and variable capacity structures, the compressor's discharge port (outputting high-pressure refrigerant) and the gas-liquid separator's inlet (outputting low-pressure refrigerant) are connected to the variable capacity port to control whether one of the compression cylinders is operating. The variable capacity port is connected to the compressor's locking mechanism used to control whether one compression cylinder is operating.

[0004] A second solenoid valve 8 and a first solenoid valve 7 are respectively installed in the pipeline for supplying high-pressure refrigerant to the variable-capacity cylinder and the pipeline for supplying low-pressure refrigerant. The opening and closing of the first solenoid valve 7 is controlled to allow gas to enter the variable-capacity cylinder, thereby realizing the dual-cylinder and single-cylinder operation of the compressor. In this design, the pipeline distance of the first solenoid valve 7 is long, and the high-pressure valve and the low-pressure valve are too close in the pipeline structure. Utility Model Content

[0005] The present invention aims to provide a compressor and an air conditioning system to improve the problem of long pipelines for supplying low-pressure refrigerant to the locking mechanism in the prior art.

[0006] According to one aspect of the present invention, a compressor is provided, the compressor comprising:

[0007] The casing is equipped with an exhaust port;

[0008] A first compression section is disposed inside the housing and has a first air intake port;

[0009] The second compression section is disposed inside the housing and has a second air intake port, and is arranged vertically with the first compression section;

[0010] The locking mechanism is disposed within the housing and has a first state that prevents the second compression unit from compressing the refrigerant and a second state that allows the second compression unit to compress the refrigerant. The locking mechanism has an air inlet for introducing refrigerant to control the switching of the locking mechanism between the first state and the second state.

[0011] A first flow path connects an air inlet and a first air intake, and at least a portion of the first flow path near the first air intake is disposed within the housing; or, a first flow path connects an air inlet and a second air intake, and at least a portion of the first flow path near the second air intake is disposed within the housing.

[0012] In some embodiments, the compressor further includes:

[0013] The second flow path connects the exhaust port and the air inlet;

[0014] The first solenoid valve is installed in the first flow path to control the opening and closing of the first flow path;

[0015] The second solenoid valve is installed in the second flow path to control the opening and closing of the second flow path.

[0016] In some embodiments,

[0017] The first solenoid valve is not higher than the first compression section or the second compression section;

[0018] The second solenoid valve is located at the top of the housing.

[0019] In some embodiments, the exhaust port is located at the top of the housing, the first compression section, the second compression section, and the locking mechanism are arranged sequentially from top to bottom, the second flow path is connected to the exhaust port and extends downward to the locking mechanism to connect with the air inlet, and the second solenoid valve is located at one end of the second flow path near the exhaust port.

[0020] In some embodiments, the first flow path includes:

[0021] The first flow path section is connected to the first air intake and located at the end of the first flow path near the first air intake, or connected to the second air intake and located at the end of the first flow path near the second air intake, and the first flow path section is disposed inside the housing.

[0022] The second flow path is connected to the air inlet and located at the end of the first flow path near the air intake. The second flow path is set inside the housing.

[0023] The third flow path is connected to the downstream end of the first flow path along the refrigerant flow direction and extends to the outside of the housing. The downstream end of the three flow paths outside the housing is connected to the inlet of the first solenoid valve located outside the housing.

[0024] The fourth flow path is connected to the outlet of the first solenoid valve at one end and to the air inlet at the other end.

[0025] In some embodiments, the fourth flow path extends from the first solenoid valve into the housing and communicates with the intake port.

[0026] In some embodiments, the housing is provided with a variable capacity port connected to the air intake port, the downstream end of the second flow path along the refrigerant flow direction is connected to the variable capacity port, and the end of the fourth flow path away from the first solenoid valve is connected to the variable capacity port, or connected to the end of the second flow path near the variable capacity port.

[0027] In some embodiments,

[0028] The first compression section includes a first cylinder with a first intake port, a first roller rotatably disposed within the first cylinder and whose axis is offset from the axis of the first cylinder, a first sliding plate abutting against the first roller to form a compression chamber communicating with the first intake port, and a first elastic member pushing the first sliding plate toward the first roller. The first flow path includes a channel disposed on the first cylinder; or

[0029] The second compression section includes a second cylinder with a second intake port, a second roller rotatably disposed in the second cylinder and whose axis is offset from the axis of the second cylinder, a second slide plate abutting against the second roller to form a compression chamber communicating with the second intake port, and a second elastic member that pushes the second slide plate toward the second roller. The first flow path includes a channel disposed on the second cylinder.

[0030] In some embodiments, the locking mechanism includes a second slide plate configured to lock in a position separated from the second roller. The locking mechanism includes a piston cylinder, a piston movably disposed within the piston cylinder, and a locking pin connected to the piston and used to lock the second slide plate. The locking pin is configured to move with the piston to switch between a first position locking the second slide plate and a second position releasing the second slide plate. An air intake is in communication with a cavity of the piston cylinder located on one side of the piston.

[0031] According to another aspect of the present invention, an air conditioning system is also provided, which includes the compressor described above.

[0032] By applying the technical solution of this application, the inlet end of the first flow path used to deliver low-pressure refrigerant to the suction port of the locking mechanism is connected to the first suction port of the first compression section or the second suction port of the second compression section. That is, low-pressure refrigerant is introduced into the compressor and delivered to the inlet of the locking mechanism. Compared with introducing low-pressure refrigerant at the gas-liquid separator outside the compressor, it is beneficial to simplify the structure and shorten the pipeline, making the compressor 10 and the pipeline connected to it more regular and compact.

[0033] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 A schematic diagram of an air conditioning system according to an embodiment of the present invention is shown;

[0036] Figure 2 A schematic diagram of the compressor and its auxiliary piping of an air conditioning system according to an embodiment of the present invention is shown.

[0037] Figure 3 A schematic diagram of the compressor structure of an air conditioning system according to an embodiment of the present invention is shown;

[0038] Figure 4 A schematic diagram of the locking mechanism of the compressor in an air conditioning system according to an embodiment of the present invention is shown.

[0039] Figure 5 A control flowchart of an air conditioning system according to an embodiment of the present invention is shown.

[0040] In the picture:

[0041] 10. Compressor; 20. Four-way valve; 30. First heat exchanger; 40. First throttling component; 50. First gas-liquid separator; 60. High-pressure sensor; 70. Low-pressure sensor; 80. Oil separator; 90. Second gas-liquid separator; 100. First control valve; 110. Second throttling component; 120. Second control valve; 130. Third control valve;

[0042] 1. Housing; 11. Exhaust port; 2. First compression section; 21. First intake port; 22. First cylinder; 3. Second compression section; 31. Second intake port; 32. Second cylinder; 4. Locking mechanism; 41. Piston cylinder; 42. Piston; 43. Locking pin; 44. Spring; 45. Air inlet; 46. Connecting port; 5. First flow path; 51. First flow path segment; 52. Second flow path segment; 53. Third flow path segment; 54. Fourth flow path segment; 6. Second flow path; 7. First solenoid valve; 8. Second solenoid valve; 9. Variable capacity port. Detailed Implementation

[0043] The technical solutions of the present utility model 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 utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. 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 scope of protection of the present utility model.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0045] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0046] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0047] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. It should also be noted in the description of this application that, 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 direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0049] Unless otherwise specified, the term "or" is inclusive in this application. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, the condition "A or B" is satisfied by any of the following conditions: A is true or exists and B is false or does not exist; A is false or does not exist and B is true or exists; or both A and B are true or exist.

[0050] like Figure 1 and 2 As shown, the air conditioning system of this embodiment includes a compressor 10, a four-way valve 20, a first heat exchanger 30, a first throttling component 40, a second heat exchanger, and a first gas-liquid separator 50. The first throttling component 40 is disposed in the pipeline connecting the first heat exchanger 30 and the second heat exchanger.

[0051] The four-way valve 20 includes an inlet connected to the exhaust port 11 of the compressor 10, an outlet connected to the suction port of the compressor 10, a first working port connected to the first heat exchanger 30, and a second working port connected to the second heat exchanger.

[0052] The four-way valve 20 has a first operating state and a second operating state. In the first operating state, the inlet and first working port of the four-way valve 20 are connected, and the outlet and second working port are connected. The first heat exchanger 30 functions as a condenser, and the second heat exchanger functions as an evaporator.

[0053] The air conditioning system also includes an oil separator 80 installed in the pipeline between the exhaust port 11 of the compressor 10 and the inlet of the four-way valve 20, and a high-pressure sensor 60 installed in the pipeline between the oil separator 80 and the inlet of the four-way valve 20.

[0054] The air conditioning system also includes a first gas-liquid separator 50 and a second gas-liquid separator 90 connected between the outlet of the four-way valve 20 and the suction port of the compressor 10. A low-pressure sensor 70 is installed in the pipeline between the first gas-liquid separator 50 and the suction port of the compressor 10.

[0055] The air conditioning system also includes a second throttling component 110 in a pipeline connecting the oil separator 80 and the suction port of the compressor 10. The air conditioning system also includes a bypass pipeline bypassing the second throttling component 110 and a first control valve 100 disposed in the bypass pipeline.

[0056] The air conditioning system also includes a second control valve 120 disposed in the pipeline between the first heat exchanger 30 and the second heat exchanger, and a third control valve 130 disposed in the pipeline between the second heat exchanger and the second working port of the four-way valve 20.

[0057] See Figure 2 and Figure 3 The compressor includes a housing 1, a first compression section 2 and a second compression section 3, a locking mechanism 4 and a first flow path 5.

[0058] The housing 1 is provided with an exhaust port 11. The first compression unit 2 is disposed inside the housing 1 and has a first intake port 21. The second compression unit 3 is disposed inside the housing 1 and has a second intake port 31, and is arranged vertically with the first compression unit 2.

[0059] The locking mechanism 4 is disposed within the housing 1 and has a first state that prevents the second compression unit 3 from compressing the refrigerant and a second state that allows the second compression unit 3 to compress the refrigerant. The locking mechanism 4 has an air inlet 45 for introducing refrigerant to control the switching of the locking mechanism 4 between the first state and the second state.

[0060] The first flow path 5 connects the air inlet 45 and the first air intake 21, and at least a section of the first flow path 5 near the first air intake 21 is disposed within the housing 1; or, the first flow path 5 connects the air inlet 45 and the second air intake 31, and at least a section of the first flow path 5 near the second air intake 31 is disposed within the housing 1.

[0061] In the technical solution of this application, the inlet end of the first flow path 5, used to deliver low-pressure refrigerant to the suction port of the locking mechanism 4, is connected to the first suction port 21 of the first compression section 2 or the second suction port 31 of the second compression section 3. That is, low-pressure refrigerant is introduced inside the compressor 10 and delivered to the inlet 45 of the locking mechanism 4. Compared to introducing low-pressure refrigerant at the gas-liquid separator outside the compressor 10, this simplifies the structure, shortens the pipeline, and reduces the complexity of the pipeline, making the compressor 10 and its connected pipelines more regular and compact. Furthermore, it helps to reduce potential leakage points, lower the failure rate, and improve system reliability.

[0062] In some embodiments, the compressor further includes a second flow path 6, a first solenoid valve 7, and a second solenoid valve 8. The second flow path 6 connects the exhaust port 11 and the intake port 45; the first solenoid valve 7 is disposed in the first flow path 5 to control the opening and closing of the first flow path 5; the second solenoid valve 8 is disposed in the second flow path 6 to control the opening and closing of the second flow path 6.

[0063] The second flow path 6 delivers the high-pressure refrigerant output from the exhaust port of the compressor 10 to the inlet of the locking mechanism 4. The first solenoid valve 7 and the second solenoid valve 8 control the opening and closing of the first flow path 5 and the second flow path 6, respectively. One of the first solenoid valve 7 and the second solenoid valve 8 is open while the other is closed, so that one of the first flow path 5 and the second flow path 6 delivers refrigerant to the inlet 45 of the locking mechanism 4. The refrigerant delivered to the inlet 45 from one of the first flow path 5 and the second flow path 6 is used to switch the locking mechanism 4 to the first state, and the refrigerant delivered to the suction port from the other is used to switch the locking mechanism 4 to the second state. The switching between the first state and the second state of the locking mechanism 4 is achieved by controlling the opening and closing of the first solenoid valve 7 and the second solenoid valve 8.

[0064] In some embodiments, the first compression section 2 and the second compression section 3 are connected in parallel, that is, the first intake port 21 of the first compression section 2 and the second intake port 31 of the second compression section 3 are respectively connected to the intake port of the compressor 10 to compress the refrigerant introduced into the intake port of the compressor 10.

[0065] In other embodiments, the first compression unit 2 and the second compression unit 3 are connected in series. For example, the second intake port 31 of the second compression unit 3 is connected to the intake port of the compressor 10, and the exhaust port of the second compression unit 3 is connected to the first intake port 21 of the first compression unit 2. The second compression unit 3 first compresses the introduced refrigerant, and the refrigerant compressed by the second compression unit 3 is sent to the first compression unit 2 for further compression.

[0066] In some embodiments, the first solenoid valve 7 is not higher than the first compression section 2 or the second compression section 3; the second solenoid valve 8 is disposed at the top of the housing 1.

[0067] Since the inlet end of the first flow path 5 is connected to the first suction port 21 of the first compression section 2 or the second suction port 31 of the second compression section 3, and the first flow path 5 is connected to the gas-liquid separator, the first flow path 5 and the first solenoid valve 7 can be set at a lower position near the first compression section 2 or the second compression section 3. Therefore, the distance between the first solenoid valve 7 and the second solenoid valve 8 is increased, the electromagnetic interference between the solenoid valves is reduced, and the system reliability is improved.

[0068] The exhaust port 11 is located at the top of the housing 1. The first compression part 2, the second compression part 3 and the locking mechanism 4 are arranged sequentially from top to bottom. The second flow path 6 is connected to the exhaust port 11 and extends downward to the locking mechanism 4 to connect with the air inlet 45. The second solenoid valve 8 is located at one end of the second flow path 6 near the exhaust port 11.

[0069] Since the first compression section 2 and the second compression section 3 are located at the exhaust port 11, the first flow path 5 and the first solenoid valve 7 can be located at a lower position of the compressor 10. This not only helps to shorten the first flow path 5 and reduce its complexity, but also helps to increase the distance between the first solenoid valve 7 and the second solenoid valve 8. This reduces the complexity of the pipeline in the system, simplifies the system structure, reduces electromagnetic interference between solenoid valves, and improves system reliability.

[0070] In some embodiments, see Figure 3 The first flow path 5 includes the first flow path segment 51, the second flow path segment 52, the third flow path segment 53, and the fourth flow path segment 54.

[0071] The first flow path 51 is connected to the first air intake 21 and located at one end of the first flow path 5 near the first air intake 21, or connected to the second air intake 31 and located at one end of the first flow path 5 near the second air intake 31. The first flow path 51 is disposed inside the housing 1.

[0072] The second flow path 52 is connected to the air inlet 45 and is located at the end of the first flow path 5 near the air inlet 45. The second flow path 52 is disposed inside the housing 1.

[0073] The third flow section 53 is connected to the downstream end of the first flow section 51 along the refrigerant flow direction and extends to the outside of the housing 1. The downstream end of the third flow section 53 located outside the housing 1 is connected to the inlet of the first solenoid valve 7 located outside the housing 1.

[0074] One end of the fourth flow section 54 is connected to the outlet of the first solenoid valve 7, and the other end is connected to the air inlet 45.

[0075] The first flow path 51 extends downward from the first intake port 21 or the second intake port 31, and the third flow path 53 and the first solenoid valve 7 are located below the first intake port 21 or the second intake port 31, which helps to shorten the first flow path 5 and reduce the height of the first solenoid valve 7.

[0076] Specifically, in this embodiment, the first flow path 5 is connected to the second air intake port adjacent to the locking mechanism 4, which further shortens the first flow path 5 and lowers the position of the first solenoid valve 7.

[0077] In some embodiments, the fourth flow path 54 extends from the first solenoid valve 7 into the housing 1 and communicates with the air inlet 45. The fourth flow path 54, located below the first flow path 51 and the third flow path 53, extends into the housing 1 to deliver low-pressure refrigerant to the air inlet 45 of the locking mechanism 4, thereby controlling the state of the locking mechanism 4.

[0078] In some embodiments, the housing 1 is provided with a variable capacity port 9 connected to the air inlet 45, the downstream end of the second flow path 6 along the refrigerant flow direction is connected to the variable capacity port 9, and the end of the fourth flow path section 54 away from the first solenoid valve 7 is connected to the variable capacity port 9, or connected to the end of the second flow path 6 near the variable capacity port 9.

[0079] The fourth flow path 54 delivers refrigerant to the air inlet 45 through the second flow path 6, which helps to simplify the structure of the compressor 10, reduce the openings on the casing 1 of the compressor 10, and ensure the overall sealing of the compressor.

[0080] The first compression section 2 includes a first cylinder 22 with a first intake port 21, a first roller rotatably disposed within the first cylinder 22 with its axis offset from the axis of the first cylinder 22, a first sliding plate abutting against the first roller to form a compression chamber communicating with the first intake port, and a first elastic member pushing the first sliding plate toward the first roller. In some optional embodiments, the first flow path 5 includes a channel disposed on the first cylinder.

[0081] Setting a portion of the first flow path 5 on the first cylinder 22 helps to simplify the internal structure of the compressor 10 and reduce the overall complexity of the compressor.

[0082] The second compression section 3 includes a second cylinder 32 with a second intake port 31, a second roller rotatably disposed within the second cylinder and whose axis is offset from the axis of the second cylinder 32, a second vane abutting against the second roller to form a compression chamber communicating with the second intake port, and a second elastic member pushing the second vane toward the second roller. In this embodiment, the first flow path 5 includes a channel disposed on the second cylinder. Disposing a portion of the first flow path 5 on the first cylinder 22 simplifies the internal structure of the compressor 10 and reduces the overall complexity of the compressor.

[0083] In some embodiments, the locking mechanism 4 includes a second slide plate configured to lock in a position separated from the second roller. The locking mechanism 4 includes a piston cylinder 41, a piston 42 movably disposed within the piston cylinder 41, and a locking pin 43 connected to the piston 42 and used to lock the second slide plate. The locking pin 43 is configured to move with the piston 42 to switch between a first position locking the second slide plate and a second position releasing the second slide plate. An air inlet 45 communicates with a cavity of the piston cylinder 41 located on one side of the piston 42.

[0084] See Figure 3 and Figure 4The air inlet 45 of the locking mechanism 4 is connected to the rod chamber (the side of the piston near the locking pin 43) of the piston cylinder 41, and the rodless chamber (the side of the piston away from the locking pin 43) of the piston cylinder 41 is connected to the inner cavity of the housing 1 through the connecting port 46. Since the gas compressed by the first compression section 2 and / or the second compression section 3 is discharged into the inner cavity of the housing 1 of the compressor 10, the rodless chamber side of the piston cylinder 41 is under high pressure. The locking mechanism 4 also includes a spring 44 that pushes the piston 42 toward the rodless chamber side (that is, the locking pin 43 is in a second state that allows the second compression section 3 to compress the refrigerant).

[0085] When the first solenoid valve 7 is open and the second solenoid valve 8 is closed, the high pressure introduced by the connecting port 46 overcomes the elastic force of the spring 44 and the pressure of the low-pressure refrigerant introduced by the first flow path, pushing the locking pin upward so that the locking pin 43 locks the slide of the second compression section 3, thereby preventing the second compression section 3 from compressing the refrigerant, and the locking mechanism is in the first state.

[0086] When the first solenoid valve 7 is closed and the second solenoid valve 8 is open, the combined force of the high-pressure refrigerant introduced by the second flow path 6 and the spring 43 overcomes the pressure of the high-pressure refrigerant introduced by the connecting port 46, pushing the locking pin 43 downward so that the locking pin 43 separates from the slide of the second compression part 3, and the locking mechanism is in the second state.

[0087] Specifically, in this embodiment, the pipeline originally connecting the variable capacity port 9 and the inlet of the gas-liquid separator is eliminated. The first flow path 5, equipped with the first solenoid valve 7, is moved to the space between the variable capacity port and the second suction port 31 of the second compression section 3 inside the compressor 10. The first solenoid valve is located outside the housing 1, while the original second solenoid valve 8 and second flow path 6 are retained. Through this variable capacity structure, the pressure of the gas entering the piston cylinder is adjusted, thereby controlling the unloading and loading of the cylinder and realizing the variable frequency and variable capacity of the unit. This structure has a shorter pipeline distance and a longer solenoid valve distance. Through two solenoid valves, the variable capacity function is achieved simply and with a low failure rate.

[0088] First, the variable displacement piping includes a second flow path 6 and a first flow path 5. The second flow path 6 connects the discharge port 11 and the variable displacement port 9 of the compressor 10, and contains a second solenoid valve 8. The first flow path 5 is located inside the compressor 10. A second suction port 31 and the variable displacement port 9 are connected inside the compressor 10, and the piping contains a first solenoid valve 7. The valve's piping is located inside the compressor, and the solenoid valve coil is connected outside the compressor. The loading and unloading of the piston cylinder are controlled by the first solenoid valve 7 and the second solenoid valve 8.

[0089] The variable displacement structure 7 of the rotary compressor controls the movement of the locking pin 43 by the pressure difference between the variable displacement port and the internal high pressure end.

[0090] When the second solenoid valve 8 is closed and the first solenoid valve 7 is open, the variable capacity port 9 is connected to the second suction port 31. The variable capacity port is at low pressure. At this time, the locking pin 43 moves to the low pressure end under the high pressure at the bottom end, overcoming the elastic force of the spring 44, and finally fixes the sliding vane of the compressor. The rotor in the second cylinder 32 cannot compress the gas, the piston cylinder is unloaded, and the compressor operates in single cylinder.

[0091] When the second solenoid valve 8 is opened and the first solenoid valve 7 is closed, the variable capacity port 9 is connected to the exhaust port 11. The variable capacity port is under high pressure. At this time, the pressure difference between the upper and lower ends of the locking pin 43 decreases, and the spring force causes the locking pin 43 to return to its original position. At this time, the sliding vane can move with the rotor to compress the gas, and the piston cylinder is loaded. At this time, the compressor operates with two cylinders.

[0092] See Figure 5 When the compressor 10 is started, the compressor is powered on, the second solenoid valve 8 is opened, and the compressor starts with two cylinders. After a certain period of time, the target frequency is changed according to the load change. The system judges whether the frequency requirement for cylinder switching is met. If it is met, the first solenoid valve 7 is opened to switch to single-cylinder operation. Otherwise, the second solenoid valve 8 remains energized to maintain the dual-cylinder state.

[0093] Only one of the second solenoid valve 8 and the first solenoid valve 7 can remain energized. During system operation, the system constantly judges the set frequency based on load changes. If the load decreases and the frequency of the dual-cylinder operation meets the cylinder-switching condition, the second solenoid valve 8 is closed to switch to a single cylinder, reducing output and saving energy. Conversely, if the load increases and the frequency of the single cylinder operation meets the cylinder-switching condition, the second solenoid valve 8 is opened to switch to dual cylinders, increasing output.

[0094] In actual operation, this structure can achieve the loading and unloading of the piston cylinder by controlling the on / off states of the second solenoid valve 8 and the first solenoid valve 7. When the second solenoid valve 8 is open, the high-pressure end is connected to the piston cylinder, and the locking pin is separated from the rotor, thus loading the piston cylinder. When the first solenoid valve 7 is open, the low-pressure end is connected to the piston cylinder, and the rotor is fixed to the locking pin, thereby unloading the piston cylinder.

[0095] This design avoids the risk of refrigerant leakage and the increased maintenance and installation difficulty caused by excessively long piping, while also increasing the distance between the first solenoid valves 7 to prevent electromagnetic interference between valves. This improves system reliability while achieving the compressor's variable frequency and variable capacity functionality.

[0096] According to another aspect of the present invention, an air conditioning system is also provided, which includes the compressor described above.

[0097] The above are merely exemplary embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A compressor, characterized in that, include: The housing (1) is provided with an exhaust port (11); A first compression section (2) is disposed inside the housing (1) and has a first air intake (21); The second compression section (3) is disposed inside the housing (1) and has a second air intake (31), and is arranged vertically with the first compression section (2); A locking mechanism (4) is provided inside the housing (1) and has a first state that prevents the second compression unit (3) from compressing the refrigerant and a second state that allows the second compression unit (3) to compress the refrigerant. The locking mechanism (4) has an air inlet (45) for introducing refrigerant to control the switching of the locking mechanism (4) between the first state and the second state. A first flow path (5) connects the air inlet (45) and the first air intake (21), and at least a section of the first flow path (5) near the first air intake (21) is disposed in the housing (1); or, the first flow path (5) connects the air inlet (45) and the second air intake (31), and at least a section of the first flow path (5) near the second air intake (31) is disposed in the housing (1).

2. The compressor according to claim 1, characterized in that, Also includes: The second flow path (6) connects the exhaust port (11) and the air inlet (45); A first solenoid valve (7) is provided in the first flow path (5) to control the opening and closing of the first flow path (5); A second solenoid valve (8) is provided in the second flow path (6) to control the opening and closing of the second flow path (6).

3. The compressor according to claim 2, characterized in that, The first solenoid valve (7) is not higher than the first compression section (2) or the second compression section (3); The second solenoid valve (8) is located on the top of the housing (1).

4. The compressor according to claim 2, characterized in that, The exhaust port (11) is located at the top of the housing (1). The first compression part (2), the second compression part (3) and the locking mechanism (4) are arranged sequentially from top to bottom. The second flow path (6) is connected to the exhaust port (11) and extends downward to the locking mechanism (4) to connect with the air inlet (45). The second solenoid valve (8) is located at one end of the second flow path (6) near the exhaust port (11).

5. The compressor according to claim 2, characterized in that, The first flow path (5) includes: First flow path section (51); connected to the first air intake (21) and located at one end of the first flow path (5) near the first air intake (21), or connected to the second air intake (31) and located at one end of the first flow path (5) near the second air intake (31), the first flow path section (51) is disposed inside the housing (1); The second flow path (52) is connected to the air inlet (45) and located at one end of the first flow path (5) near the air inlet (45). The second flow path (52) is disposed inside the housing (1). The third flow section (53) is connected to the downstream end of the first flow section (51) along the refrigerant flow direction and extends to the outside of the housing (1). The downstream end of the third flow section (53) located outside the housing (1) is connected to the inlet of the first solenoid valve (7) located outside the housing (1). The fourth flow path (54) is connected at one end to the outlet of the first solenoid valve (7) and at the other end to the air inlet (45).

6. The compressor according to claim 5, characterized in that, The fourth flow path (54) extends from the first solenoid valve (7) into the housing (1) and communicates with the air inlet (45).

7. The compressor according to claim 5, characterized in that, The housing (1) is provided with a variable capacity port (9) connected to the air inlet (45). The downstream end of the second flow path (6) along the refrigerant flow direction is connected to the variable capacity port (9). The end of the fourth flow path section (54) away from the first solenoid valve (7) is connected to the variable capacity port (9), or connected to the end of the second flow path (6) near the variable capacity port (9).

8. The compressor according to claim 1, characterized in that, The first compression section (2) includes a first cylinder (22) having the first intake port (21), a first roller rotatably disposed within the first cylinder (22) and whose axis is offset from the axis of the first cylinder (22), a first sliding plate abutting against the first roller to form a compression chamber communicating with the first intake port, and a first elastic member pushing the first sliding plate toward the first roller. The first flow path (5) includes a channel disposed on the first cylinder. The second compression section (3) includes a second cylinder (32) having a second air intake (31), a second roller rotatably disposed in the second cylinder and whose axis is offset from the axis of the second cylinder (32), a second slide plate abutting against the second roller to form a compression chamber communicating with the second air intake, and a second elastic member pushing the second slide plate toward the second roller. The first flow path (5) includes a channel disposed on the second cylinder.

9. The compressor according to claim 8, characterized in that, The locking mechanism (4) includes a piston cylinder (41), a piston (42) movably disposed within the piston cylinder (41), and a locking pin (43) connected to the piston (42) and used to lock the second slide. The locking pin (43) is configured to move with the piston (42) to switch between a first position locking the second slide and a second position releasing the second slide. The air inlet (45) communicates with a cavity of the piston cylinder (41) located on one side of the piston (42).

10. An air conditioning system, characterized in that, The compressor includes any one of claims 1 to 9.

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