Pump body assembly and variable capacity compressor having the same

Abstract

This invention provides a pump assembly and a variable displacement compressor having the same, comprising: a cylinder having an inlet, a receiving cavity, and an outlet; a roller; a vane cooperating with the roller to divide the receiving cavity into a first inlet chamber and a first compression chamber; and a variable displacement member having a relatively disposed clearance state and a working state. The variable displacement member, the roller, and the vane cooperate to divide the receiving cavity into a buffer chamber, a second inlet chamber, and a second compression chamber, wherein the volume of the second compression chamber is smaller than the volume of the first compression chamber. When the contact position between the roller and the inner wall of the cylinder passes the variable displacement member, a second inlet chamber is formed between the variable displacement member and the roller, and the second inlet chamber communicates with the inlet. A second compression chamber is formed between the roller and the vane. The technical solution provided by this application can solve the problem in the prior art where, under low load operation, the compressor operates at a frequency lower than the minimum operating frequency, resulting in frequent start-stop cycles and a significant increase in compressor energy consumption.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more specifically, to a pump assembly and a variable displacement compressor having the same. Background Technology

[0002] In order to adjust the capacity output according to the load demand, most air conditioning systems use variable frequency compressors, which can adjust the capacity output by adjusting the compressor frequency.

[0003] Under the same conditions, the compressor's displacement and cooling capacity are directly proportional to its cylinder volume; the larger the effective cylinder volume, the greater the compressor's displacement and cooling capacity. To meet users' demand for small size and large cooling capacity, the current industry trend in compressor development is to replace single-cylinder compressors with dual-cylinder compressors, increasing the compressor's cooling capacity by increasing displacement. However, when the system's cooling capacity demand is low, although variable frequency compressors can reduce cooling capacity by lowering the operating frequency, compressors have a minimum operating frequency that cannot be reduced indefinitely. When the system operates under low load conditions, the compressor's operating frequency may fall below the minimum operating frequency, causing the air conditioning system to frequently start and stop, leading to a significant increase in compressor energy consumption. Summary of the Invention

[0004] The present invention provides a pump body assembly and a variable capacity compressor having the same, to solve the problem in the prior art where the compressor operates at a frequency lower than the minimum operating frequency when the air conditioning system is working under low load, resulting in frequent start-stop cycles and thus a significant increase in compressor energy consumption.

[0005] According to one aspect of the present invention, a pump body assembly is provided, comprising: a cylinder having an inlet, a receiving cavity, and an exhaust port, both the inlet and the exhaust port communicating with the receiving cavity; a roller rotatably disposed within the receiving cavity; a slide vane movably disposed on a side wall of the cylinder, the slide vane being located between the inlet and the exhaust port, one end of the slide vane abutting against the side wall of the roller, the slide vane cooperating with the roller to divide the receiving cavity into a first inlet chamber and a first compression chamber; and a variable displacement member movably disposed on a side wall of the cylinder, the variable displacement member being located between the inlet and the exhaust port along the direction of rotation of the roller, the variable displacement member having a relatively... The device is configured in both a clearance state and a working state. When the variable displacement component is in the working state, one end of the variable displacement component abuts against the side wall of the roller. The variable displacement component, the roller, and the sliding vane work together to divide the receiving cavity into a buffer chamber, a second air intake chamber, and a second compression chamber. The volume of the second compression chamber is smaller than the volume of the first compression chamber. The buffer chamber is located between the sliding vane and the variable displacement component and is connected to the air intake port. When the contact position between the roller and the inner wall of the cylinder passes the variable displacement component along the rotation direction of the roller, a second air intake chamber is formed between the variable displacement component and the roller. The second air intake chamber is connected to the air intake port. A second compression chamber is formed between the roller and the sliding vane.

[0006] Furthermore, the cylinder is provided with a variable displacement channel, which is independent of the receiving cavity. One end of the variable displacement channel is connected to the air inlet, and the other end of the variable displacement channel is connected to the second air inlet chamber. When the variable displacement component is in the avoidance state, the variable displacement component blocks the variable displacement channel; when the variable displacement component is in the working state, the variable displacement channel is connected to the second air inlet chamber.

[0007] Furthermore, a first sliding groove is provided on the side wall of the cylinder, the first sliding groove is connected to the receiving cavity, and the variable displacement component is movably disposed in the first sliding groove.

[0008] Furthermore, the first slide groove is connected to the variable displacement channel, and the variable displacement component is provided with a flow groove. When the variable displacement component is in the working state and the roller rotates in the rotation direction to the space between the variable displacement component and the slide plate, the flow groove is connected to the variable displacement channel and the groove opening of the first slide groove respectively, so that the variable displacement channel is connected to the second air intake chamber through the flow groove; when the variable displacement component is in the avoidance state, the flow groove is disconnected from the groove opening of the first slide groove, so that the variable displacement channel is disconnected from the second compression chamber.

[0009] Furthermore, the flow channel is located in the middle of the variable displacement component along its length and is positioned at the top of the variable displacement component.

[0010] Furthermore, the depth H of the flow channel is greater than the depth h of the variable capacity channel.

[0011] Furthermore, the cross-sectional area of ​​the flow channel along the axial direction is greater than 50% of the cross-sectional area of ​​the variable displacement component along the axial direction.

[0012] Furthermore, the flow channel has a retracted position located within the first slide groove and an extended position extending from the opening of the first slide groove. When the flow channel is in the retracted position, the minimum distance b from the end of the flow channel near the roller to the second air inlet chamber is not less than 0.3 mm.

[0013] Furthermore, the outer periphery of the opening of the first chute is provided with a clearance groove.

[0014] Furthermore, the pump body assembly includes multiple variable displacement components, which are spaced apart along the circumference of the cylinder between the air inlet and the exhaust port. Each variable displacement component has a buffer chamber between it and the air inlet, and each variable displacement component can form a second air inlet chamber with the roller.

[0015] Furthermore, the pump body assembly also includes a locking assembly, which can fix the variable displacement component. The locking assembly has an unlocked state and a locked state that are set relatively. When the locking assembly is in the unlocked state, the variable displacement component is in the working state. When the locking assembly is in the locked state, the variable displacement component is in the avoidance state.

[0016] Furthermore, the pump body assembly also includes: an upper flange, located above the cylinder; and a lower flange, located below the cylinder. The upper and lower flanges cooperate with the cylinder to close the receiving cavity. The lower flange is provided with a receiving groove, and a locking component is located in the receiving groove.

[0017] Furthermore, a flow hole is provided on the lower flange. One end of the flow hole passes through the lower flange, and the other end of the flow hole is connected to the receiving groove. Gas can pass through the flow hole to switch the locking component from the unlocked state to the locked state.

[0018] Furthermore, the variable displacement member is provided with a slot, and the locking assembly includes: a locking member, which is movably disposed in the receiving slot, the locking member having an initial position and a locked position relative to each other, when the locking member is in the locked position, the locking member passes through the slot to brake the variable displacement member, and when the locking member is in the initial position, the locking member is disposed away from the variable displacement member; and a reset member, which is disposed between the locking member and the lower flange, the reset member being able to drive the locking member to move from the locked position to the initial position.

[0019] According to another aspect of the present invention, a variable displacement compressor is provided, the variable displacement compressor including the pump body assembly provided above.

[0020] By applying the technical solution of this invention, when the compressor is running normally, the variable displacement component is in a clearance state, which increases the compression space of the pump assembly, thereby increasing the cooling capacity of the compressor and enabling the pump assembly to meet the high-load operating requirements of the air conditioning system. When the compressor is operating with variable displacement, the variable displacement component is in a working state, which reduces the compression space of the pump assembly, thereby reducing the cooling capacity of the compressor and enabling the pump assembly to meet the low-load operating requirements of the air conditioning system. Furthermore, this does not require reducing the operating frequency of the compressor, thus avoiding frequent start-stop cycles in the air conditioning system and preventing a significant increase in compressor energy consumption. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0022] Figure 1 A schematic diagram of the pump body assembly provided according to Embodiment 1 of the present invention is shown;

[0023] Figure 2 It shows Figure 1 A magnified view of a section at point A in the middle;

[0024] Figure 3 A schematic diagram of the pump body assembly provided in Embodiment 1 of the present invention is shown when it begins to compress during normal operation.

[0025] Figure 4 This diagram illustrates the structure of the pump assembly provided in Embodiment 1 of the present invention, which is compressed while air is being introduced during normal operation.

[0026] Figure 5 It shows Figure 4 A magnified view of a section at point B in the middle;

[0027] Figure 6 A schematic diagram of the structure of the pump body assembly that begins compression when its volume changes, according to Embodiment 1 of the present invention, is shown.

[0028] Figure 7 It shows Figure 6 A magnified view of a section at point C;

[0029] Figure 8 A schematic diagram of the pump assembly according to Embodiment 1 of the present invention is shown, showing the structure of the pump assembly undergoing simultaneous air intake and compression during variable displacement.

[0030] Figure 9 A schematic diagram of the air intake structure of the pump body assembly under variable displacement according to Embodiment 1 of the present invention is shown;

[0031] Figure 10 A schematic diagram of the structure of the variable displacement component provided in Embodiment 1 of the present invention is shown;

[0032] Figure 11 A cross-sectional view of the variable displacement member in the AA direction according to Embodiment 1 of the present invention is shown;

[0033] Figure 12 A cross-sectional view of a pump body assembly provided according to Embodiment 1 of the present invention is shown;

[0034] Figure 13 It shows Figure 12 A magnified view of a section at point D;

[0035] Figure 14 A schematic diagram of the pump body assembly provided according to Embodiment 2 of the present invention is shown;

[0036] Figure 15 A cross-sectional view of the variable displacement member in the AA direction according to Embodiment 3 of the present invention is shown;

[0037] Figure 16 A cross-sectional view of the variable displacement member in the AA direction according to Embodiment 4 of the present invention is shown.

[0038] The above figures include the following reference numerals:

[0039] 10. Cylinder; 11. Air inlet; 12. Receiving cavity; 121. First air inlet chamber; 122. First compression chamber; 123. Buffer chamber; 124. Second air inlet chamber; 125. Second compression chamber; 13. Exhaust port; 14. Variable displacement channel; 15. First slide groove; 151. Clearance groove; 16. Second slide groove;

[0040] 20. Roller;

[0041] 30. Slider;

[0042] 40. Variable displacement component; 41. Flow channel; 42. Slot;

[0043] 50. Locking assembly; 51. Locking element; 52. Reset element;

[0044] 61. Upper flange; 62. Lower flange; 621. Receiving groove; 622. Flow hole; 63. Crankshaft. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] like Figures 1 to 9As shown, Embodiment 1 of this application provides a pump body assembly, which includes a cylinder 10, a roller 20, a vane 30, and a displacement element 40. The cylinder 10 has an inlet 11, a receiving cavity 12, and an exhaust port 13, both of which are connected to the receiving cavity 12. Gas can enter the receiving cavity 12 through the inlet 11 and then be discharged through the exhaust port 13. The roller 20 is rotatably disposed within the receiving cavity 12. The vane 30 is movably disposed on the side wall of the cylinder 10, located between the inlet 11 and the exhaust port 13. One end of the vane 30 abuts against the side wall of the roller 20, and the vane 30 cooperates with the roller 20 to divide the receiving cavity 12 into a first inlet chamber 121 and a first compression chamber 122. The variable displacement member 40 is movably disposed on the side wall of the cylinder 10. The variable displacement member 40 is located between the air inlet 11 and the exhaust port 13 along the rotation direction of the roller 20. The variable displacement member 40 has a relatively disposed clearance state and a working state. When the variable displacement member 40 is in the working state, one end of the variable displacement member 40 abuts against the side wall of the roller 20. The variable displacement member 40, the roller 20, and the sliding vane 30 cooperate to divide the receiving cavity 12 into a buffer cavity 123, a second air inlet chamber 124, and a second compression chamber 125. The volume of the second compression chamber 125 is smaller than the volume of the first compression chamber 122. When the variable displacement member 40 is in the clearance state, the sliding vane 30 works independently within the cylinder 10. The sliding vane 30 cooperates with the roller 20 to divide the receiving cavity 12 into a first air inlet chamber 121 and a first compression chamber 122. The buffer chamber 123 is located between the sliding vane 30 and the variable displacement member 40. The buffer chamber 123 is connected to the air inlet 11. When the contact position between the roller 20 and the inner wall of the cylinder 10 passes through the variable displacement member 40 along the rotation direction of the roller 20, a second air inlet chamber 124 is formed between the variable displacement member 40 and the roller 20. The second air inlet chamber 124 is connected to the air inlet 11. A second compression chamber 125 is formed between the roller 20 and the sliding vane 30.

[0047] Using the above structure, such as Figure 3 As shown, point E is the position where roller 20 begins compression during normal operation. At this time, the volume of the first compression chamber 122 reaches the maximum volume that the pump assembly can compress during normal operation. When the variable displacement element 40 is in the working state, as... Figure 6 As shown, point F is the position where roller 20 begins to compress during the change of volume. At this time, the volume of the second compression chamber 125 reaches the maximum volume that the pump assembly can compress during the change of volume. The gas in the buffer chamber 123 between the sliding vane 30 and the change of volume element 40 cannot be compressed. Figure 3 and Figure 6A comparison clearly shows that the volume of the second compression chamber 125 is smaller than that of the first compression chamber 122. With this configuration, when the compressor is running normally, the variable displacement element 40 is in a clearance state, which increases the compression space of the pump assembly, thereby increasing the compressor's cooling capacity and enabling the pump assembly to meet the high-load operating requirements of the air conditioning system. When the compressor is operating with variable displacement, the variable displacement element 40 is in the working state, which reduces the compression space of the pump assembly, thereby reducing the compressor's cooling capacity and enabling the pump assembly to meet the low-load operating requirements of the air conditioning system. Furthermore, this design does not require reducing the compressor's operating frequency, thus avoiding frequent start-stop cycles and preventing a significant increase in compressor energy consumption. Simultaneously, with this structure, when the compressor is operating with variable displacement, it can always operate at the optimal operating frequency, improving compressor performance and preventing problems such as low volumetric efficiency and motor efficiency due to excessively low operating frequency. It also avoids issues such as internal vibration or low-frequency clicking noise caused by excessively low operating frequency. Furthermore, with the above structure, the variable displacement component 40 and the sliding vane 30 are located in the same cylinder 10, and the normal operation and variable displacement operation of the compressor are completed in the same cylinder 10, avoiding the need to add other cylinders 10. This simplifies the structure of the pump body assembly and reduces the production cost of the compressor.

[0048] Among them, such as Figure 3 and Figure 4 As shown, when the compressor is running normally, the roller 20 rotates clockwise. When the roller 20 reaches point E, the gas in the cylinder 10 begins to be compressed. As the roller 20 continues to rotate, the volume of the first compression chamber 122 gradually decreases, and the volume of the first intake chamber 121 gradually increases from 0 until the roller 20 reaches point E again, at which point the volume of the first intake chamber 121 is at its maximum, and the volume of the first compression chamber 122 is 0. The roller 20 rotates again, and at this time the first intake chamber 121 is converted into the first compression chamber 122 to begin compression, thus performing cyclic operation.

[0049] like Figure 2 As shown, the cylinder 10 is provided with a variable displacement channel 14, which is independent of the receiving cavity 12. One end of the variable displacement channel 14 is connected to the air inlet 11, and the other end is configurably connected to the second air inlet chamber 124. This configuration facilitates the machining of the cylinder 10 and also facilitates the control of gas flow. When the variable displacement component 40 is in the avoidance state, it blocks the variable displacement channel 14, thus ensuring normal gas flow; when the variable displacement component 40 is in the working state, the variable displacement channel 14 is connected to the second air inlet chamber 124. During compressor variable displacement operation, the roller 20 rotates clockwise, and the sliding vane 30 cooperates with the variable displacement component 40 to achieve the purpose of delayed intake, such as... Figure 6 As shown, when roller 20 reaches point F, the gas in the second compression chamber 125 begins to compress, while the gas in the buffer chamber 123 cannot be compressed; as Figure 8 As shown, after the roller 20 continues to rotate, the volume of the second compression chamber 125 gradually decreases, the buffer chamber 123 connects with the variable displacement channel 14, and at the same time, the buffer chamber 123 becomes part of the second intake chamber 124, that is, the variable displacement channel 14 also connects with the second intake chamber 124, and the second intake chamber 124 gradually increases; as Figure 9 As shown, when the roller 20 rotates to the air inlet 11, the compressed gas has been completely discharged. At this time, the variable displacement channel 14 is still connected to the second air inlet chamber 124, and since the second air inlet chamber 124 is not closed, the gas is not compressed. Until the roller 20 rotates to point F again, the receiving chamber 12 in the cylinder 10 is divided into the buffer chamber 123 and the second compression chamber 125. The roller 20 rotates again, and at this time, it starts to compress with the second compression chamber 125, thus performing cyclic work.

[0050] like Figure 2 As shown, a first sliding groove 15 is provided on the side wall of the cylinder 10, and the first sliding groove 15 communicates with the receiving cavity 12. The variable displacement component 40 is movably disposed within the first sliding groove 15. The variable displacement component 40 is a variable displacement slide plate, which is simple in structure and facilitates the movement of the variable displacement component 40. Furthermore, a second sliding groove 16 is also provided on the side wall of the cylinder 10, and the slide plate 30 is disposed within the second sliding groove 16. The first sliding groove 15 and the second sliding groove 16 have the same structure, which facilitates the machining of the cylinder 10. At the same time, a first opening and a second opening are respectively provided at the ends of the variable displacement component 40 and the slide plate 30 away from the roller 20, and a first spring and a second spring are respectively provided between the first opening and the first sliding groove 15 and between the second opening and the second sliding groove 16. This arrangement allows the variable displacement component 40 and the slide plate 30 to abut against the side wall of the roller 20 during the rotation of the roller 20. Furthermore, the position of the roller 20 when the variable displacement channel 14 is connected to the second intake chamber 124, and the position of the roller 20 when the variable displacement channel 14 is disconnected from the second intake chamber 124, can be specifically set according to the position of the first slide groove 15 and the length of the variable displacement component 40. At the same time, changing the position of the first slide groove 15 can change the volume of the second compression chamber 125, which facilitates the adjustment of the volume of the second compression chamber 125 by the operator, thereby facilitating the adjustment of the discharge volume during compressor variable displacement operation.

[0051] The first chute 15 is connected to the variable displacement channel 14, and the variable displacement component 40 is provided with a flow groove 41. Figure 8As shown, when the variable displacement element 40 is in the working state, and the roller 20 rotates in the rotation direction to a position between the variable displacement element 40 and the sliding plate 30, and simultaneously when the roller 20 rotates in the rotation direction to a position between the air inlet 11 and the variable displacement element 40, the flow groove 41 connects with the variable displacement channel 14 and the opening of the first sliding groove 15, respectively, so that the variable displacement channel 14 connects with the second air inlet chamber 124 through the flow groove 41. When the variable displacement element 40 is in the avoidance state, that is, when the roller 20 abuts against the variable displacement element 40, the flow groove 41 disconnects from the opening of the first sliding groove 15, so that the variable displacement channel 14 disconnects from the second compression chamber 125, thus enabling the compression of the gas in the second compression chamber 125 in subsequent operations. This configuration is simple in structure and facilitates the processing of the variable displacement element 40.

[0052] like Figure 10 As shown, the flow channel 41 is located in the middle of the variable displacement member 40 along its length and is also located at the top of the variable displacement member 40. This arrangement facilitates the connection and disconnection between the variable displacement channel 14 and the second air inlet chamber 124, and the positions of the flow channel 41 and the variable displacement channel 14 correspond to each other, which facilitates the flow of gas.

[0053] like Figure 2 and Figure 10 The depth H of the flow channel 41 is greater than the depth h of the variable volume channel 14. Since the gas in the variable volume channel 14 passes through the variable volume component 40 when it enters the second intake chamber 124, this setting avoids the gas in the variable volume channel 14 from impacting the variable volume component 40, thereby preventing damage to the variable volume component 40, thus improving the service life of the variable volume component 40 and ensuring normal operation of the compressor during variable volume changes.

[0054] like Figure 11 As shown, the axial cross-sectional area of ​​the flow channel 41 is greater than 50% of the axial cross-sectional area of ​​the variable displacement element 40. This arrangement ensures smooth gas flow and prevents blockages. Furthermore, since the variable displacement element 40 slides back and forth within the first slide groove 15 during operation, the intake volume during the entire intake phase of variable displacement operation exhibits a dynamic process with the reciprocating motion of the variable displacement element 40, thereby effectively ensuring the stability of the compressor operation. In this application, the flow channel 41 is designed as a rectangle, as shown... Figure 15 and Figure 16 As shown, the flow channel 41 can be configured in various shapes such as trapezoidal or rhomboid.

[0055] like Figure 7As shown, the flow channel 41 has a retracted position located within the first slide groove 15 and an extended position extending from the opening of the first slide groove 15. When the flow channel 41 is in the retracted position, the minimum distance b from the end of the flow channel 41 near the roller 20 to the second intake chamber 124 is not less than 0.3 mm. This prevents gas leakage, thereby ensuring that the cylinder 10 can normally perform intake, compression, and exhaust operations. Figure 5 As shown, when the compressor is working normally, the minimum distance d from the end of the flow channel 41 near the roller 20 to the second intake chamber 124 is not less than 0.3mm. This prevents gas from entering the first intake chamber 121 through the variable displacement channel 14 and affecting the normal operation of the cylinder 10 when the compressor is not changing its displacement. Simultaneously, when the flow channel 41 is in the extended position, the extended length of the variable displacement element 40 is not greater than 50% of the overall length of the variable displacement element 40, similarly... Figure 8 As shown, when the slider 30 extends out of the groove of the second groove 16, the extension length L of the slider 30 is greater than 50% of the overall length of the slider 30. This can prevent the variable displacement component 40 from falling out of the first groove 15 and also prevent the slider 30 from falling out of the second groove 16.

[0056] The first slide groove 15 has a clearance groove 151 on its outer periphery. This design facilitates the flow of gas from the variable displacement channel 14 into the second intake chamber 124. Furthermore, when the flow channel 41 is not at the opening of the first slide groove 15, if the clearance groove 151 is provided on the outer periphery of the opening of the first slide groove 15, a vacuum zone would be formed between the roller 20, the variable displacement component 40, and the cylinder 10. This would increase the load on the compressor, leading to increased power consumption. Therefore, this design avoids increasing the compressor load and thus preventing increased power consumption.

[0057] like Figure 12 and Figure 13 As shown, the pump body assembly also includes a locking component 50, which can fix the variable displacement element 40. The locking component 50 has an unlocked state and a locked state. When the locking component 50 is in the unlocked state, the variable displacement element 40 is in the working state; when the locking component 50 is in the locked state, the variable displacement element 40 is in the avoidance state. This configuration facilitates the control of the variable displacement element 40, ensures the stability of the variable displacement element 40 when it is in the working state, and also prevents the variable displacement element 40 from accidentally switching to the working state when it is in the avoidance state, thus affecting the operation of the compressor.

[0058] Furthermore, the pump body assembly also includes an upper flange 61 and a lower flange 62. The upper flange 61 is positioned above the cylinder 10, and the lower flange 62 is positioned below the cylinder 10. The pump body assembly also includes a crankshaft 63, on which the upper flange 61, cylinder 10, roller 20, and lower flange 62 are all fitted. The upper flange 61 and lower flange 62 cooperate with the cylinder 10 to close the receiving cavity 12. The lower flange 62 has a receiving groove 621, and the locking assembly 50 is disposed within the receiving groove 621. This arrangement reduces the volume occupied by the locking assembly 50 and prevents interference between the locking assembly 50 and other components during operation.

[0059] Furthermore, a flow hole 622 is provided on the lower flange 62. One end of the flow hole 622 penetrates the lower flange 62, and the other end communicates with the receiving groove 621. Gas can pass through the flow hole 622 to switch the locking assembly 50 from the unlocked state to the locked state. This arrangement utilizes the gas within the air conditioning system to regulate the state of the locking assembly 50, thus avoiding additional energy consumption and ensuring the compressor's operating performance. In this application, one end of the flow hole 622 is connected to one end of the switching channel, and the other end of the switching channel is connected to the refrigerant channel in the air conditioning system. A solenoid valve is provided on the switching channel, which can control the opening and closing of the solenoid valve as needed.

[0060] The variable displacement member 40 is provided with a slot 42, and the locking assembly 50 includes a locking member 51 and a resetting member 52. The locking member 51 is movably disposed within the receiving groove 621. The locking member 51 has an initial position and a locked position that are relatively disposed. When the locking member 51 is in the locked position, it passes through the slot 42 to brake the variable displacement member 40. When the locking member 51 is in the initial position, it is disposed away from the variable displacement member 40. The resetting member 52 is disposed between the locking member 51 and the lower flange 62. The resetting member 52 can drive the locking member 51 to move from the locked position to the initial position. In this application, the locking member 51 is a brake pin, which includes a first stepped section and a second stepped section connected to each other. The diameter of the first stepped section is smaller than the diameter of the second stepped section. The resetting member 52 is a spring, which is sleeved on the first stepped section and can move into the slot 42. This design is simple in structure, easy to assemble and install the locking component 50, easy to operate, and can ensure the braking effect of the locking component 50.

[0061] like Figure 14As shown, Embodiment 2 of this application provides a pump body assembly, which differs from Embodiment 1 in that: the pump body assembly includes multiple variable displacement elements 40, which are spaced apart along the circumference of the cylinder 10 between the air inlet 11 and the exhaust port 13. Each variable displacement element 40 has a buffer chamber 123 between it and the air inlet 11, and each variable displacement element 40 can form a second air inlet chamber 124 between it and the roller 20. In Embodiment 2, the pump body assembly includes two variable displacement elements 40, wherein the two variable displacement elements 40 along the rotation direction of the roller 20 are a first variable displacement vane and a second variable displacement vane, respectively. The first variable displacement vane and the second variable displacement vane control the opening and closing of the variable displacement channel 14, thereby controlling the second compression volume of the cylinder 10 to achieve the purpose of variable displacement. The compressor is equipped with a first variable displacement vane and a second variable displacement vane, which can achieve a dual variable displacement effect. When both the first and second variable displacement vanes are in the avoidance state, the compressor operates normally. When the first variable displacement vane is in the working state and both the second variable displacement vanes are in the avoidance state, the compressor is in the first variable displacement state. When the second variable displacement vane is in the working state and the first variable displacement vane is in the avoidance state, the compressor operates in the second variable displacement state. This allows the compressor to operate with three different displacements.

[0062] Embodiment 3 of this application provides a variable displacement compressor, which includes the pump assembly described above. The variable displacement compressor includes a housing, and the pump assembly is disposed within the housing. This configuration allows the compressor to meet the high-load operating requirements of the air conditioning system while also meeting the low-load operating requirements. Furthermore, this eliminates the need to reduce the compressor's operating frequency, thereby avoiding frequent start-stop cycles in the air conditioning system and preventing a significant increase in compressor energy consumption.

[0063] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0064] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0065] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0066] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0067] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pump body assembly, characterized in that, The pump assembly includes: A cylinder (10) has an air inlet (11), a receiving cavity (12) and an exhaust port (13), wherein the air inlet (11) and the exhaust port (13) are both connected to the receiving cavity (12); Roller (20) is rotatably disposed within the receiving cavity (12); A sliding vane (30) is movably disposed on the side wall of the cylinder (10). The sliding vane (30) is located between the air inlet (11) and the exhaust port (13). One end of the sliding vane (30) abuts against the side wall of the roller (20). The sliding vane (30) and the roller (20) cooperate to divide the receiving cavity (12) into a first air inlet chamber (121) and a first compression chamber (122). A variable displacement element (40) is movably disposed on the side wall of the cylinder (10). The variable displacement element (40) is located between the air inlet (11) and the exhaust port (13) along the rotation direction of the roller (20). The variable displacement element (40) has a relatively disposed clearance state and a working state. When the variable displacement element (40) is in the working state, one end of the variable displacement element (40) abuts against the side wall of the roller (20). The variable displacement element (40), the roller (20) and the slide (30) cooperate to divide the receiving cavity (12) into a buffer cavity (123), a second air inlet chamber (124) and a second compression chamber (125). The volume of the second compression chamber (125) is smaller than the volume of the first compression chamber (122). The buffer chamber (123) is located between the slide plate (30) and the variable displacement member (40). The buffer chamber (123) is connected to the air inlet (11). When the contact position between the roller (20) and the inner wall of the cylinder (10) passes through the variable displacement member (40) along the rotation direction of the roller (20), a second air inlet chamber (124) is formed between the variable displacement member (40) and the roller (20). The second air inlet chamber (124) is connected to the air inlet (11). A second compression chamber (125) is formed between the roller (20) and the slide plate (30).

2. The pump body assembly according to claim 1, characterized in that, The cylinder (10) is provided with a variable displacement channel (14), which is independent of the receiving cavity (12). One end of the variable displacement channel (14) is connected to the air inlet (11), and the other end of the variable displacement channel (14) is connected to the second air intake chamber (124). When the variable displacement component (40) is in the avoidance state, the variable displacement component (40) blocks the variable displacement channel (14); when the variable displacement component (40) is in the working state, the variable displacement channel (14) is connected to the second air intake chamber (124).

3. The pump body assembly according to claim 2, characterized in that, The cylinder (10) has a first sliding groove (15) on its side wall. The first sliding groove (15) is connected to the receiving cavity (12). The variable displacement component (40) is movably disposed in the first sliding groove (15).

4. The pump body assembly according to claim 3, characterized in that, The first slide groove (15) is connected to the variable displacement channel (14). The variable displacement component (40) is provided with a flow groove (41). When the variable displacement component (40) is in the working state and the roller (20) rotates in the rotation direction to the space between the variable displacement component (40) and the slide plate (30), the flow groove (41) is connected to the groove opening of the variable displacement channel (14) and the first slide groove (15) respectively, so that the variable displacement channel (14) is connected to the second air intake chamber (124) through the flow groove (41); when the variable displacement component (40) is in the avoidance state, the flow groove (41) is disconnected from the groove opening of the first slide groove (15), so that the variable displacement channel (14) is disconnected from the second compression chamber (125).

5. The pump body assembly according to claim 4, characterized in that, The flow channel (41) is located in the middle of the variable displacement member (40) along the length direction of the variable displacement member (40) and is disposed at the top of the variable displacement member (40).

6. The pump body assembly according to claim 5, characterized in that, The depth H of the flow channel (41) is greater than the depth h of the variable capacity channel (14).

7. The pump body assembly according to claim 5, characterized in that, The cross-sectional area of ​​the flow channel (41) along the axial direction is greater than 50% of the cross-sectional area of ​​the variable displacement element (40) along the axial direction.

8. The pump body assembly according to claim 5, characterized in that, The flow channel (41) has a retracted position located within the first slide groove (15) and an extended position extending from the opening of the first slide groove (15). When the flow channel (41) is in the retracted position, the minimum distance b from the end of the flow channel (41) near the roller (20) to the second air intake chamber (124) is not less than 0.3 mm.

9. The pump body assembly according to claim 4, characterized in that, The outer periphery of the groove opening of the first chute (15) is provided with a clearance groove (151).

10. The pump body assembly according to claim 1, characterized in that, The pump assembly includes multiple variable displacement elements (40), which are arranged circumferentially between the air inlet (11) and the exhaust port (13) of the cylinder (10). Each variable displacement element (40) is provided with a buffer chamber (123) between itself and the air inlet (11), and each variable displacement element (40) can form a second air inlet chamber (124) between itself and the roller (20).

11. The pump body assembly according to claim 1, characterized in that, The pump assembly also includes: A locking component (50) is provided, which can fix the deformable member (40). The locking component (50) has an unlocked state and a locked state that are set opposite to each other. When the locking component (50) is in the unlocked state, the deformable member (40) is in the working state. When the locking component (50) is in the locked state, the deformable member (40) is in the avoidance state.

12. The pump body assembly according to claim 11, characterized in that, The pump assembly also includes: The upper flange (61) is located above the cylinder (10); The lower flange (62) is located below the cylinder (10). The upper flange (61) and the lower flange (62) cooperate with the cylinder (10) to close the receiving cavity (12). The lower flange (62) is provided with a receiving groove (621), and the locking assembly (50) is located in the receiving groove (621).

13. The pump body assembly according to claim 12, characterized in that, The lower flange (62) is provided with a flow hole (622), one end of which passes through the lower flange (62) and the other end of which communicates with the receiving groove (621). Gas can pass through the flow hole (622) to switch the locking assembly (50) from the unlocked state to the locked state.

14. The pump body assembly according to claim 13, characterized in that, The variable-capacity component (40) is provided with a slot (42), and the locking assembly (50) includes: A locking member (51) is movably disposed within the receiving groove (621). The locking member (51) has an initial position and a locking position that are relatively disposed. When the locking member (51) is in the locking position, the locking member (51) passes through the slot (42) to brake the deformable member (40). When the locking member (51) is in the initial position, the locking member (51) is disposed away from the deformable member (40). A reset member (52) is disposed between the locking member (51) and the lower flange (62), and the reset member (52) is capable of driving the locking member (51) to move from the locked position to the initial position.

15. A variable displacement compressor, characterized in that, The variable displacement compressor includes the pump body assembly according to any one of claims 1 to 14.

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