Rotary compressor, air conditioner

Abstract

The present invention provides a rotary compressor and an air conditioner. The rotary compressor includes a crankshaft assembly, and the crankshaft assembly includes a power straight shaft, a first driven crankshaft, and a second driven crankshaft. The first driven crankshaft includes a first shaft body and a first eccentric portion provided on the first shaft body. The second driven crankshaft includes a second shaft body and a second eccentric portion provided on the second shaft body. The first shaft body and the second shaft body are both sleeve structures and are both sleeved on the outer peripheral side of the power straight shaft. The power straight shaft can selectively drive any one of the first driven crankshaft and the second driven crankshaft to rotate. According to the present invention, by driving one of the first driven crankshaft or the second driven crankshaft to rotate through the power straight shaft and enabling free switching, the operation of the compressor can more meet the requirements of different system refrigerant amounts.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressor manufacturing, and particularly relates to a rotary compressor and an air conditioner. Background Art

[0002] At present, the double-rotor compressors used in air-conditioning systems are all pump structures that rotate synchronously and in the same direction. The eccentric circles of the crankshaft are distributed symmetrically on both sides to offset a part of the dynamic unbalance force during the compression process. However, the vibration of the pump body is still very large during the overall operation process. The large vibration will make the operation of the compressor unstable and affect its use reliability. For some cylinders rotating in opposite directions, the constantly moving cylinder cannot be freely switched or selected. Summary of the Invention

[0003] Therefore, the present invention provides a rotary compressor and an air conditioner, which can overcome the deficiency that the constantly moving cylinder of the compressor in the related art cannot be freely switched.

[0004] To solve the above problems, the present invention provides a rotary compressor, including a crankshaft assembly. The crankshaft assembly includes a power straight shaft, a first driven crankshaft, and a second driven crankshaft. The first driven crankshaft includes a first shaft body and a first eccentric portion provided on the first shaft body. The second driven crankshaft includes a second shaft body and a second eccentric portion provided on the second shaft body. The first shaft body and the second shaft body are both sleeve structures and are both sleeved on the outer peripheral side of the power straight shaft. The power straight shaft can selectively drive any one of the first driven crankshaft and the second driven crankshaft to rotate.

[0005] In some embodiments, a first main bevel gear and a second main bevel gear are provided on the power straight shaft at intervals along its axial direction. A first driven bevel gear is provided on the first shaft body, and a second driven bevel gear is provided on the second shaft body. The first main bevel gear and the first driven bevel gear are respectively selectively meshed with a first transmission bevel gear to make the rotation directions of the first main bevel gear and the first driven bevel gear opposite. The second main bevel gear and the second driven bevel gear are respectively selectively meshed with a second transmission bevel gear to make the rotation directions of the second main bevel gear and the second driven bevel gear opposite.

[0006] In some embodiments, the rotary compressor further includes an upper flange. An electric motor assembly is provided at the end of the power straight shaft. There is a first shaft fixing member between the upper flange and the electric motor assembly. The first shaft is rotatably connected to the first shaft fixing member.

[0007] In some embodiments, the first shaft fixing member includes a fixing disk. The fixing disk is configured with ventilation holes so that the exhaust gas flow passing through the upper flange can enter the space where the electric motor assembly is located.

[0008] In some embodiments, the first shaft fixing member further includes a bevel gear mounting member for determining and adjusting the position of the first drive bevel gear; and / or, the first main bevel gear, the first driven bevel gear, and the first drive bevel gear are all located between the fixed disk and the motor assembly.

[0009] In some embodiments, one side of the fixed disk facing the upper flange has a PTFE microporous membrane.

[0010] In some embodiments, there is also a clamping structure between the first shaft and the power straight shaft, and the clamping structure can enable the first shaft to rotate synchronously with the power straight shaft; and / or, there is also a clamping structure between the second shaft and the power straight shaft, and the clamping structure can enable the second shaft to rotate synchronously with the power straight shaft.

[0011] In some embodiments, the rotary compressor further includes a first sliding vane corresponding to the first eccentric portion and a second sliding vane corresponding to the second eccentric portion, and the first sliding vane and the second sliding vane are arranged symmetrically about the rotation center axis of the first shaft; and / or, it further includes a first cylinder corresponding to the first eccentric portion and a second cylinder corresponding to the second eccentric portion. The first cylinder has a first suction passage, and the second cylinder has a second suction passage. The first suction passage and the second suction passage are arranged symmetrically about the rotation center axis of the power straight shaft.

[0012] In some embodiments, the rotary compressor further includes a first liquid distributor communicated with the first suction passage and a second liquid distributor communicated with the second suction passage, and the first liquid distributor and the second liquid distributor are arranged symmetrically about the rotation center axis of the first shaft.

[0013] In some embodiments, the power straight shaft has a central oil passage, and the central oil passage can transport the lubricating oil in the oil sump to the tooth positions of at least one of the first main bevel gear, the first driven bevel gear, and the first drive bevel gear and the tooth positions of at least one of the second main bevel gear, the second driven bevel gear, and the second drive bevel gear.

[0014] The present invention also provides an air conditioner, including the above-mentioned rotary compressor.

[0015] For the rotary compressor and the air conditioner provided by the present invention, the eccentric portions respectively possessed by the first driven crankshaft and the second driven crankshaft and the compression chambers of the corresponding pump body structures can be designed differently. Furthermore, according to the actual requirements for the displacement of the compressor, one of the first driven crankshaft or the second driven crankshaft can be driven to rotate by the power straight shaft, and free switching can be achieved, so that the operation of the compressor can better meet the requirements of different system refrigerant amounts. Brief Description of the Drawings

[0016] Figure 1 It is a schematic internal structure diagram of a rotary compressor according to an embodiment of the present invention;

[0017] Figure 2 is Figure 1 a schematic structure diagram of the crankshaft assembly in (including the first driving bevel gear and the second driving bevel gear);

[0018] Figure 3 is Figure 2 a schematic structure diagram of the power straight shaft in;

[0019] Figure 4 is Figure 2 a schematic structure diagram of the first crankshaft in.

[0020] The reference numerals are shown as:

[0021] 1, power straight shaft; 11, first main bevel gear; 12, second main bevel gear; 2, first driven crankshaft; 21, first shaft body; 22, first eccentric part; 23, first driven bevel gear; 24, first shaft body fixing member; 241, fixing disc; 242, ventilation hole; 243, bevel gear mounting member; 25, first cylinder; 26, first liquid distributor; 3, second driven crankshaft; 31, second shaft body; 32, second eccentric part; 33, second driven bevel gear; 34, second shaft body fixing member; 35, second cylinder; 36, second liquid distributor; 41, central oil passage; 42, first radial oil passage hole; 43, second radial oil passage hole; 51, first driving bevel gear; 52, second driving bevel gear; 6, PTFE microporous membrane; 100, upper flange; 101, oil sump; 102, motor assembly; 103, housing. Detailed Description of the Invention

[0022] Refer to in combination Figures 1 to 4As shown, according to an embodiment of the present invention, a rotary compressor is provided, which includes a housing 103, inside which a pump body assembly and a motor assembly 102 are provided. Among them, the pump body assembly has a crankshaft assembly, and the crankshaft assembly includes a power straight shaft 1, a first driven crankshaft 2, and a second driven crankshaft 3. The first driven crankshaft 2 includes a first shaft body 21 and a first eccentric portion 22 provided on the first shaft body 21. The second driven crankshaft 3 includes a second shaft body 31 and a second eccentric portion 32 provided on the second shaft body 31. The first shaft body 21 and the second shaft body 31 are both sleeve structures and are both sleeved on the outer peripheral side of the power straight shaft 1. The power straight shaft 1 can selectively drive any one of the first driven crankshaft 2 and the second driven crankshaft 3 to rotate. It can be understood that the motor assembly 102 is provided at the end of the power straight shaft 1. In this technical solution, the eccentric portions respectively possessed by the first driven crankshaft 2 and the second driven crankshaft 3 and the compression chambers of the corresponding pump body structures can be designed to be different. Furthermore, according to the actual demand for the displacement of the compressor, one of the first driven crankshaft 2 or the second driven crankshaft 3 can be driven to rotate by the power straight shaft 1, and free switching can be achieved, so that the operation of the compressor can better meet the requirements of different system refrigerant amounts.

[0023] In some embodiments, a first main bevel gear 11 and a second main bevel gear 12 are provided on the power straight shaft 1 at intervals along its axial direction. A first driven bevel gear 23 is provided on the first shaft body 21, and a second driven bevel gear 33 is provided on the second shaft body 31. The first main bevel gear 11 and the first driven bevel gear 23 are respectively selectively meshed with a first transmission bevel gear 51 to achieve opposite rotation directions of the first main bevel gear 11 and the first driven bevel gear 23. The second main bevel gear 12 and the second driven bevel gear 33 are respectively selectively meshed with a second transmission bevel gear 52 to achieve opposite rotation directions of the second main bevel gear 12 and the second driven bevel gear 33. This technical solution provides a specific power transmission method, which is simple and compact in structure. It can be understood that the first transmission bevel gear 51 and the second transmission bevel gear 52 can be respectively controlled to move towards or away from the first main bevel gear 11, the first driven bevel gear 23, the second main bevel gear 12, and the second driven bevel gear 33, so as to realize the meshing of the bevel gears and thus the switching of power transmission or not. When the first transmission bevel gear 51 and the second transmission bevel gear 52 are both in a disengaged state, the first driven crankshaft 2 and the second driven crankshaft 3 will not rotate following the rotation of the power straight shaft 1. Therefore, generally speaking, corresponding settings should be made in the corresponding control system to ensure that at least one of the first transmission bevel gear 51 and the second transmission bevel gear 52 is meshed with the corresponding main bevel gear and driven bevel gear at any time, so as to prevent the compressor from idling. It can be understood that 90° tooth meshing is respectively formed between the first transmission bevel gear 51 and the first main bevel gear 11 and the first driven bevel gear 23, and 90° tooth meshing is respectively formed between the second transmission bevel gear 52 and the second main bevel gear 12 and the second driven bevel gear 33. At this time, the rotation directions of the first driven crankshaft 2 and the second driven crankshaft 3 will be opposite to the rotation direction of the power straight shaft 1. It can be understood that the rotation speed of the corresponding eccentric part can also be controlled by designing the number of teeth of the meshing bevel gears, so as to broaden the applicable working conditions of the compressor.

[0024] It can be understood that the first driven crankshaft 2 and the second driven crankshaft 3 should be reliably fixed in position, where the position refers to their axial position and radial position. In the field of production and manufacturing of compressors, the technology of rotatable positioning of the rotating shaft is already well-known, and the present invention does not make special limitations. The rotary compressor further includes an upper flange 100. In some embodiments, there is a first shaft fixing member 24 between the upper flange 100 and the motor assembly 102. The first shaft 21 is rotatably connected to the first shaft fixing member 24. Preferably, the first shaft fixing member 24 includes a fixing disk 241, and vent holes 242 are formed on the fixing disk 241 so that the exhaust air flow passing through the upper flange 100 can enter the space where the motor assembly 102 is located. While the fixing disk 241 realizes rotatable fixation of the first shaft 21, it can also form a relatively independent cavity between the upper flange 100 and it, which can buffer and obstruct the exhaust air flow of the pump body assembly, preventing the vibration and noise caused by the directly impacting of the compressed air flow on the motor assembly 102 in the prior art, thereby reducing the total vibration value and total noise value of the entire compressor. The first shaft fixing member 24 includes a fixing disk 241, and vent holes 242 are formed on the fixing disk 241 so that the exhaust air flow passing through the upper flange 100 can enter the space where the motor assembly 102 is located. In some embodiments, at least one side of the fixing disk 241 facing the upper flange 100 has a PTFE (polytetrafluoroethylene polymer chemical material) microporous membrane 6, which can play a good role in noise reduction and vibration reduction.

[0025] In some embodiments, the first shaft fixing member 24 further includes a bevel gear mounting member 243 for determining and adjusting the position of the first driving bevel gear 51. As described above, the bevel gear mounting member 243 should be configured to enable the corresponding first driving bevel gear 51 to move towards or away from the first main bevel gear 11 and the first driven bevel gear 23.

[0026] In some embodiments, the first main bevel gear 11, the first driven bevel gear 23, and the first driving bevel gear 51 are all located between the fixing disk 241 and the motor assembly 102, so that the exhaust of the pump body assembly does not directly impact the foregoing bevel gears, reducing the generation of noise; the second main bevel gear 12, the second driven bevel gear 33, and the second driving bevel gear 52 are correspondingly arranged in the area between the lower flange and the oil sump 101. It can be understood that the second shaft 31 is rotatably mounted on the second shaft fixing member 34, and the second shaft fixing member 34 can be fixedly connected to the housing 103 at the bottom of the oil sump 101.

[0027] In some embodiments, there is also a clamping structure between the first shaft body 21 and the power straight shaft 1. The clamping structure can enable the first shaft body 21 to rotate synchronously with the power straight shaft 1. It can be understood that when the clamping structure of either the first shaft body 21 or the second shaft body 31 plays a clamping role, the corresponding driven crankshaft will directly rotate synchronously and in the same direction with the rotation of the power straight shaft 1. When only the clamping structure of one of the two driven crankshafts is controlled to clamp, the rotation directions of the two driven crankshafts will be opposite. How to further cancel out the unbalanced force during the operation of the compressor and reduce the vibration and noise of the compressor? The clamping structure can, for example, adopt a clutch structure in the prior art.

[0028] There is also a clamping structure between the second shaft body 31 and the power straight shaft 1. The clamping structure can enable the second shaft body 31 to rotate synchronously with the power straight shaft 1. Similar to the fixation of the first transmission bevel gear 51, the second transmission bevel gear 52 is also correspondingly connected to another independent bevel gear mounting member 243.

[0029] In some embodiments, the rotary compressor further includes a first sliding vane corresponding to the first eccentric portion 22 and a second sliding vane corresponding to the second eccentric portion 32. The first sliding vane and the second sliding vane are arranged symmetrically about the rotation center axis of the first shaft body 21; and / or, it further includes a first cylinder 25 corresponding to the first eccentric portion 22 and a second cylinder 35 corresponding to the second eccentric portion 32. The first cylinder 25 has a first suction channel, and the second cylinder 35 has a second suction channel. The first suction channel and the second suction channel are arranged symmetrically about the rotation center axis of the power straight shaft 1. Further, the rotary compressor further includes a first liquid distributor 26 communicated with the first suction channel and a second liquid distributor 36 communicated with the second suction channel. The first liquid distributor 26 and the second liquid distributor 36 are arranged symmetrically about the rotation center axis of the first shaft body 21. At this time, the entire pump body structure of the compressor and the appearance of the compressor are both symmetrically arranged, and the noise and vibration of the compressor will be greatly weakened, achieving "extremely quiet" operation.

[0030] In some embodiments, the power straight shaft 1 has a central oil passage 41. The central oil passage 41 can convey the lubricating oil in the oil sump 101 to the tooth positions of at least one of the first main bevel gear 11, the first driven bevel gear 23, and the first transmission bevel gear 51 and the tooth positions of at least one of the second main bevel gear 12, the second driven bevel gear 33, and the second transmission bevel gear 52 to lubricate the meshing positions of the bevel gears and reduce wear. See Figure 1As shown, the central oil passage 41 has a first radial oil passage hole 42 and a second radial oil passage hole 43. The first radial oil passage hole 42 guides the lubricating oil in the central oil passage 41 to a position adjacent to the bevel gear of the first driven crankshaft 2 and finally enters its tooth part. The second radial oil passage hole 43 guides the lubricating oil in the central oil passage 41 to a position adjacent to the second driven crankshaft 3 and finally enters its tooth part.

[0031] According to an embodiment of the present invention, there is also provided an air conditioner including the above-mentioned rotary compressor.

[0032] It is easily understood by those skilled in the art that, on the premise of no conflict, the above-mentioned advantageous ways can be freely combined and superimposed.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A rotary compressor, characterized in that, It includes a crankshaft assembly, and the crankshaft assembly includes a power straight shaft (1), a first driven crankshaft (2), and a second driven crankshaft (3). Among them, the first driven crankshaft (2) includes a first shaft body (21) and a first eccentric part (22) provided on the first shaft body (21). The second driven crankshaft (3) includes a second shaft body (31) and a second eccentric part (32) provided on the second shaft body (31). The first shaft body (21) and the second shaft body (31) are both sleeve structures and are both sleeved on the outer peripheral side of the power straight shaft (1). The power straight shaft (1) can selectively drive any one of the first driven crankshaft (2) and the second driven crankshaft (3) to rotate; on the power straight shaft (1), a first main bevel gear (11) and a second main bevel gear (12) are provided at intervals along its axial direction. On the first shaft body (21), a first driven bevel gear (23) is provided. On the second shaft body (31), a second driven bevel gear (33) is provided. The first main bevel gear (11) and the first driven bevel gear (23) are respectively selectively meshed with a first transmission bevel gear (51) to achieve the reverse rotation directions of the first main bevel gear (11) and the first driven bevel gear (23). The second main bevel gear (12) and the second driven bevel gear (33) are respectively selectively meshed with a second transmission bevel gear (52) to achieve the reverse rotation directions of the second main bevel gear (12) and the second driven bevel gear (33).

2. The rotary compressor according to claim 1, wherein It further includes an upper flange (100). An end of the power straight shaft (1) is provided with a motor assembly (102). There is a first shaft body fixing part (24) between the upper flange (100) and the motor assembly (102). The first shaft body (21) is rotatably connected to the first shaft body fixing part (24).

3. The rotary compressor according to claim 2, characterized in that, The first shaft body fixing part (24) includes a fixing disk (241). An air vent hole (242) is formed on the fixing disk (241) so that the exhaust air flow passing through the upper flange (100) can enter the space where the motor assembly (102) is located.

4. The rotary compressor according to claim 3, characterized in that, The first shaft body fixing part (24) further includes a bevel gear mounting part (243) for determining and adjusting the position of the first transmission bevel gear (51); and / or, the first main bevel gear (11), the first driven bevel gear (23), and the first transmission bevel gear (51) are all located between the fixing disk (241) and the motor assembly (102).

5. The rotary compressor according to claim 3, wherein, One side of the fixing disk (241) facing the upper flange (100) has a PTFE microporous membrane (6).

6. The rotary compressor according to claim 1, characterized in that, There is also a clamping structure between the first shaft body (21) and the power straight shaft (1). The clamping structure can make the first shaft body (21) rotate synchronously with the power straight shaft (1); and / or, there is also a clamping structure between the second shaft body (31) and the power straight shaft (1). The clamping structure can make the second shaft body (31) rotate synchronously with the power straight shaft (1).

7. The rotary compressor according to any one of claims 1 to 6, characterized in that, It further includes a first sliding vane corresponding to the first eccentric part (22) and a second sliding vane corresponding to the second eccentric part (32), and the first sliding vane and the second sliding vane are arranged symmetrically about the rotation center axis of the first shaft body (21); and / or, it further includes a first cylinder (25) corresponding to the first eccentric part (22) and a second cylinder (35) corresponding to the second eccentric part (32), the first cylinder (25) has a first air suction channel, the second cylinder (35) has a second air suction channel, and the first air suction channel and the second air suction channel are arranged symmetrically about the rotation center axis of the power straight shaft (1).

8. The rotary compressor according to any one of claims 7, characterized in that, It further includes a first liquid distributor (26) communicated with the first air suction channel and a second liquid distributor (36) communicated with the second air suction channel, and the first liquid distributor (26) and the second liquid distributor (36) are arranged symmetrically about the rotation center axis of the first shaft body (21).

9. The rotary compressor according to claim 1, characterized in that, The power straight shaft (1) has a central oil passage (41), and the central oil passage (41) can convey the lubricating oil in the oil sump (101) to the tooth part positions of at least one of the first main bevel gear (11), the first driven bevel gear (23), and the first transmission bevel gear (51) and the tooth part positions of at least one of the second main bevel gear (12), the second driven bevel gear (33), and the second transmission bevel gear (52).

10. An air conditioner, characterized in that, It includes a rotary compressor according to any one of claims 1 to 9.

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