A pump body assembly, compressor and air conditioner

Abstract

This invention provides a pump assembly, a compressor, and an air conditioner. The pump assembly includes a crankshaft, rollers, and a cylinder. The rollers are fitted onto the outer circumferential wall of the crankshaft and are connected by threads. The rollers can reciprocate linearly along the axial direction of the crankshaft under the action of crankshaft rotation. The rollers are located inside the cylinder and divide the internal space of the cylinder into independent first and second cavities. The first and second cavities are arranged along the axial direction of the crankshaft. According to this invention, the counterweight is eliminated, eliminating the need for a counterweight to balance the force. The crankshaft has no eccentric circle, resulting in more balanced force on the compressor, reducing compressor vibration, and avoiding the vibration and component wear problems caused by eccentric rotation in the prior art. At the same time, the sliding vane structure in the prior art is eliminated, reducing moving parts, thereby reducing friction loss and refrigerant leakage, and improving the energy efficiency and reliability of the compressor.

Description

Technical Field

[0001] This invention belongs to the field of compressor manufacturing technology, specifically relating to a pump assembly, a compressor, and an air conditioner. Background Technology

[0002] Existing rotary compressors have an eccentric circle on the crankshaft. As the crankshaft rotates, the eccentric circle rotates along with it and drives the rollers on the outer circumference of the eccentric circle to rotate. In order to maintain balance, main and auxiliary balance blocks are added to the rotor. This results in an additional load on the rotating body, which reduces the compressor efficiency. At the same time, the centrifugal force generated by the rotation of the balance blocks increases the crankshaft deflection, causing compressor vibration and parts wear. Summary of the Invention

[0003] Therefore, the present invention provides a pump body assembly, a compressor, and an air conditioner that can overcome the problems of centrifugal force caused by the rotation of the balance block in the prior art, which increases crankshaft deflection and causes compressor vibration and parts wear.

[0004] To address the aforementioned problems, the present invention provides a pump body assembly, including a crankshaft, rollers, and a cylinder. The rollers are fitted onto the outer circumferential wall of the crankshaft and are connected by threads. The rollers are capable of reciprocating linear motion along the axial direction of the crankshaft under the rotation of the crankshaft. The rollers are located inside the cylinder and divide the internal space of the cylinder into independent first and second cavities. The first and second cavities are arranged along the axial direction of the crankshaft.

[0005] In some implementations...

[0006] The pump body assembly also includes a first flange and a second flange respectively disposed at both ends of the cylinder axially, and both the first flange and the second flange have vent holes.

[0007] In some implementations...

[0008] An annular groove extends radially inward on the outer circular sidewall of the roller. The roller also has an air intake channel communicating with the annular groove. The air intake channel can selectively connect the air intake hole on the cylinder to the first cavity or the second cavity via the annular groove.

[0009] In some implementations...

[0010] The roller has a first position near the first flange and a second position near the second flange. When the roller is in the first position or the second position, the groove of the annular groove at least partially overlaps with the air intake.

[0011] In some implementations...

[0012] The air intake channel includes a first air intake channel communicating with the first cavity and a second air intake channel communicating with the second cavity. The first air intake channel has a first air intake valve that can be opened and closed according to the pressure difference between the inner and outer sides of the first cavity. The second air intake channel has a second air intake valve that can be opened and closed according to the pressure difference between the inner and outer sides of the second cavity.

[0013] In some implementations...

[0014] The air intake channel has at least two channels.

[0015] In some implementations...

[0016] The threads are left-hand and right-hand threads that are interlocked, with a phase difference of 180° between the left-hand and right-hand threads.

[0017] The present invention also provides a compressor including the pump body assembly described above.

[0018] The present invention also provides an air conditioner, including the compressor described above.

[0019] This invention provides a pump assembly, compressor, and air conditioner. A roller is mounted on a crankshaft, and the crankshaft and roller are connected by a threaded connection. This allows the roller to reciprocate linearly along the crankshaft's axial direction under the crankshaft's rotation. The roller divides the cylinder into an independent first chamber and a second chamber along the crankshaft's axial direction. When the roller approaches the first chamber, the first chamber is a compression chamber, and the second chamber is an intake chamber; conversely, when the roller approaches the second chamber, the first chamber is an intake chamber, and the second chamber is a compression chamber. The reciprocating linear motion of the roller along the crankshaft's axial direction completes the intake and compression of gas. Compared with existing technologies, this invention eliminates the need for a balance block to balance the force, eliminates the crankshaft's eccentricity, and results in a more balanced force on the compressor, reducing compressor vibration and avoiding the vibration and component wear problems caused by eccentric rotation in existing technologies. Furthermore, it eliminates the need for the sliding vane structure found in existing technologies, reducing moving parts and thus reducing friction loss and refrigerant leakage, thereby improving the compressor's energy efficiency and reliability. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the internal structure of the pump body assembly according to an embodiment of the present invention;

[0021] Figure 2 This is a top view of the pump body assembly according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the crankshaft structure according to an embodiment of the present invention;

[0023] Figure 4 for Figure 3 Cross-sectional view of AA;

[0024] Figure 5 This is a cross-sectional view of the roller according to an embodiment of the present invention;

[0025] Figure 6 This is a top view of the roller according to an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the cylinder structure according to an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the internal structure of the compressor according to an embodiment of the present invention.

[0028] The reference numerals in the attached figures are as follows:

[0029] 1. Crankshaft; 2. First muffler; 3. First flange; 4. Cylinder; 5. Screw; 6. Second flange; 7. Second muffler; 8. Oil guide plate; 9. Roller; 10. Annular groove; 11. Exhaust port; 12. Intake passage; 13. First intake valve; 14. Intake port; 15. Second intake valve. Detailed Implementation

[0030] See also Figures 1 to 8 As shown, according to an embodiment of the present invention, a pump body assembly is provided, including a crankshaft 1, rollers 9, and a cylinder 4. The rollers 9 are fitted onto the outer circumferential wall of the crankshaft 1 and the two are connected by threads. The rollers 9 can reciprocate linearly along the axial direction of the crankshaft 1 under the action of rotation of the crankshaft 1. The rollers 9 are located inside the cylinder 4 and divide the internal space of the cylinder 4 into independent first cavities and second cavities. The first cavities and the second cavities are arranged along the axial direction of the crankshaft 1. In this technical solution, roller 9 is mounted on crankshaft 1, and a threaded connection is made at the mating point between crankshaft 1 and roller 9. This allows roller 9 to reciprocate linearly along the axial direction of crankshaft 1 as crankshaft 1 rotates. Roller 9 divides cylinder 4 into independent first and second chambers along the axial direction of crankshaft 1. When roller 9 moves towards the first chamber, the first chamber is the compression chamber, and the second chamber is the intake chamber. When roller 9 moves towards the second chamber, the first chamber is the intake chamber, and the second chamber is the compression chamber. The reciprocating linear motion of roller 9 along the axial direction of crankshaft 1 completes the intake and compression of gas. Compared with the prior art, there is no need for a balance block to balance the force, crankshaft 1 has no eccentric circle, the compressor is subjected to more balanced force, the compressor vibration is reduced, and the vibration and part wear problems caused by eccentric rotation in the prior art are avoided. At the same time, there is no need to set up the sliding vane structure in the prior art, reducing moving parts, thereby reducing friction loss and refrigerant leakage, and improving the energy efficiency and reliability of the compressor.

[0031] In some embodiments, the pump assembly further includes a first flange 3 and a second flange 6 respectively disposed at both axial ends of the cylinder 4, both the first flange 3 and the second flange 6 having an exhaust port 11. In this technical solution, placing the exhaust port 11 on the flange can increase the effective compression or suction space of the cylinder 4 cavity, thereby increasing the cooling capacity of the compressor.

[0032] In some embodiments, an annular groove 10 extends radially inward on the outer circumferential sidewall of the roller 9. The roller 9 also has a suction channel 12 communicating with the annular groove 10. The suction channel 12 allows the suction port 14 on the cylinder 4 to selectively communicate with either the first cavity or the second cavity via the annular groove 10. In this technical solution, an annular groove 10 is formed circumferentially on the roller 9, communicating with the suction port 14 of the cylinder 4. Refrigerant enters the annular groove 10 of the roller through the suction port 14, and then enters the roller 9 axially through the roller to form the suction channel 12. The suction channel 12 communicates with the annular groove 10, allowing the refrigerant in the annular groove 10 to enter the first cavity or the second cavity via the suction channel 12.

[0033] In some embodiments, the roller 9 has a first position near the first flange 3 and a second position near the second flange 6. When the roller 9 is in the first or second position, the groove of the annular groove 10 at least partially overlaps with the suction port 14. As the roller 9 moves axially along the crankshaft 1, although the connection between the annular groove 10 and the suction port 14 changes with the movement of the roller 9, they remain connected. This ensures that the suction chamber is constantly drawing air and will not stop drawing air due to the annular groove 10 disconnecting from the suction port, thus preventing a decrease in the compressor's cooling capacity.

[0034] In some embodiments, the suction channel 12 includes a first suction channel communicating with the first cavity and a second suction channel communicating with the second cavity. The first suction channel has a first suction valve 13 that can be opened and closed according to the pressure difference between the inside and outside of the first cavity, and the second suction channel has a second suction valve 15 that can be opened and closed according to the pressure difference between the inside and outside of the second cavity. A one-way valve is provided in the suction channel 12. When the roller 9 approaches the second cavity, the air pressure inside the first cavity is less than the air pressure outside the first cavity, the first suction valve 13 opens, and the first cavity begins to draw air. At the same time, the air pressure inside the second cavity is greater than the air pressure outside the second cavity, the second suction valve 15 closes, and the second cavity stops drawing air and begins to compress the refrigerant in the cavity. The reverse movement is the same, which can ensure the pressure inside the cavity while preventing the risk of refrigerant backflow.

[0035] In some embodiments, the suction channel 12 has at least two channels. Multiple suction channels 12 can be provided to reduce suction resistance, meet the suction requirements of the cavity, and avoid insufficient suction volume due to insufficient airflow of the suction channel 12 to meet the suction volume of the cavity, which would affect the cooling capacity of the compressor.

[0036] In some embodiments, the threads are interlocking left-hand and right-hand threads with a phase difference of 180°. This interlocking design of the left-hand and right-hand threads with a 180° phase difference ensures that when the roller 9 moves to one end of the crankshaft 1, it enters the opposite thread channel and moves in the opposite direction. This achieves automatic reversal without requiring the crankshaft 1 to reverse, avoiding wear problems caused by crankshaft 1 reversal. It also simplifies the motor control logic, as the crankshaft 1 only needs to rotate in one direction without reversal control.

[0037] According to an embodiment of the present invention, a compressor is also provided, including the pump body assembly described above.

[0038] According to an embodiment of the present invention, an air conditioner is also provided, including the compressor described above.

[0039] In one specific embodiment, the pump body assembly includes a crankshaft 1, a first muffler 2, an upper flange (i.e., first flange 3), a cylinder 4, screws 5, a lower flange (i.e., second flange 6), a second muffler 7, and an oil guide plate 8. The upper flange and the lower flange are fixed to two opposite sides of the cylinder 4 by screws 5. Rollers 9 are fitted onto the crankshaft 1 and located inside the cylinder 4. The side of the upper flange away from the cylinder 4 has the first muffler 2, and the side of the lower flange away from the cylinder 4 has the second muffler 7. The part of the crankshaft 1 that mates with the rollers 9 is a section of left- and right-hand threaded screw, which serves as both a transmission and force-transmitting helical mechanism. The left-hand and right-hand threads are interleaved with each other, with a phase difference of 180° and equal pitch. Figure 4 As shown, the cross-sections of the left-hand and right-hand threads are trapezoidal. The tooth angle α, tooth crest, and tooth root width H at the trapezoidal cross-sections of the two threads are correspondingly equal. Furthermore, the values ​​of α and H can be flexibly adjusted to balance thread strength and roller rotation requirements. The threaded grooves at the ends of the left and right threaded screws allow the roller 9 to automatically rotate, achieving automatic reversal without requiring the crankshaft 1 to reverse. When the crankshaft 1 rotates, the roller 9 rotates with the left (or right) threaded groove of the threaded screw and moves linearly along the threaded screw axis. When the roller 9 moves to the threaded end, it is constrained by the arc-shaped structure designed at the ends of the left and right threaded grooves, causing the roller 9 to swing and automatically enter the right (or left) threaded groove, thus achieving the automatic reversal function.

[0040] The inner wall of cylinder 4, the plane of roller 9, and the plane of upper flange (i.e., first flange 3) form a cylindrical upper cavity (i.e., first cavity). The inner wall of cylinder 4, the plane of roller 9, and the plane of lower flange (i.e., second flange 6) form a cylindrical lower cavity (i.e., second cavity). The inner wall of cylinder 4 is clearance-fitted with the outer circle of roller 9. Both the upper and lower flanges have exhaust holes 11. An intake channel 12 is opened in the axial direction of roller 9. One end of the intake channel 12 is connected to the cavity, and the other end is connected to the waist-shaped groove (i.e., annular groove 10) of roller. The waist-shaped groove is connected to the intake hole 14 of cylinder 4. An intake valve is installed in the intake channel 12. The intake valve automatically opens or closes the valve disc according to the pressure difference on both sides of the cavity.

[0041] Roller 9 moves linearly along the axis of the threaded screw. When roller 9 rises, it compresses the refrigerant in the upper cavity, making the upper cavity a compression chamber. The pressure in the upper cavity is greater than the suction pressure, so the upper suction valve (i.e., the first suction valve 13) closes to prevent refrigerant from flowing back into the suction port. When the exhaust pressure is reached, the high-temperature, high-pressure refrigerant opens the exhaust port on the upper flange to exhaust gas. Simultaneously, as roller 9 rises, the volume of the lower cavity expands, and the cavity pressure becomes less than the suction pressure. The lower suction valve (i.e., the second suction valve 15) opens, allowing low-pressure refrigerant to enter the cylinder suction port, the roller's waist-shaped groove, and then through the lower suction valve on roller 9 into the lower cavity. At this point, the lower cavity becomes a suction chamber. Conversely, when roller 9 descends, the upper cavity becomes a suction chamber, and the lower cavity becomes a compression chamber.

[0042] This invention features a crankshaft without an eccentric circle, eliminating the need for a balance block to balance the force. The absence of an eccentric circle on the crankshaft results in more even force distribution on the compressor, avoiding the vibration and component wear problems caused by eccentric rotation in existing technologies. Furthermore, it eliminates the need for the sliding vane structure found in existing technologies, removing the vane and spring. The cylinder also eliminates the vane groove, spring hole, and crescent groove, reducing moving parts and consequently minimizing friction loss and refrigerant leakage, thus improving the compressor's energy efficiency and reliability.

[0043] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0044] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A compressor, characterized in that, The system includes a crankshaft (1), rollers (9), and a cylinder (4). The rollers (9) are fitted onto the outer circumferential wall of the crankshaft (1) and are connected by threads. The rollers (9) can reciprocate linearly along the axial direction of the crankshaft (1) under the rotation of the crankshaft (1). The rollers (9) are located inside the cylinder (4) and divide the internal space of the cylinder (4) into independent first and second cavities. The first and second cavities are arranged along the axial direction of the crankshaft (1). When the rollers (9) move closer to the first cavity, the first cavity is a compression cavity and the second cavity is a suction cavity. When the rollers (9) move closer to the second cavity, the first cavity is a suction cavity and the second cavity is a compression cavity. The compressor also includes a first flange (3) and a second flange (6) respectively disposed at both ends of the cylinder (4) along the axial direction. Both the first flange (3) and the second flange (6) have exhaust holes (11). The outer circular sidewall of the roller (9) has an annular groove (10) extending radially inward along the roller (9). The roller (9) also has an intake channel (12) communicating with the annular groove (10). The intake channel (12) can selectively communicate the intake hole (14) on the cylinder (4) with the first cavity or the second cavity via the annular groove (10). The roller (9) has a first position near the first flange (3) and a second position near the second flange (6). When the roller (9) is in the first position or the second position, the groove of the annular groove (10) and the suction hole (14) at least partially overlap. The suction channel (12) includes a first suction channel communicating with the first cavity and a second suction channel communicating with the second cavity. The first suction channel has a first suction valve (13) that can be opened and closed according to the pressure difference between the inner and outer sides of the first cavity. The second suction channel has a second suction valve (15) that can be opened and closed according to the pressure difference between the inner and outer sides of the second cavity. The threads are left-hand and right-hand threads that are interlocked and twisted. The left-hand and right-hand threads have a phase difference of 180°. The cross-sections of the left-hand and right-hand threads are trapezoidal. The tooth angle α, tooth crest, and tooth root width H at the trapezoidal cross-sections of the two threads are correspondingly equal.

2. The compressor according to claim 1, characterized in that, The air intake channel (12) has at least two channels.

3. An air conditioner, characterized in that, The compressor includes any one of claims 1 to 2.

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