Abstract: The present disclosure provides a multi-stage compressor and an air conditioning unit. The multi-stage compressor includes a flash tank, which is arranged in the multi-stage compressor, a refrigerant inlet of the flash tank is configured to be communicated with a condenser, a vapor outlet of the flash tank is communicated with a high-pressure-stage suction port of the multi-stage compressor, and a liquid outlet of the flash tank is configured to be communicated with an evaporator. The multi-stage compressor and the air conditioning unit of the present disclosure effectively improve compressor efficiency.

Abstract: The compressor has a housing; a first rotor disposed spaced apart from the housing, the first rotor being capable of rotating along a first axis. The first rotor including a first portion and a second portion with opposite thread rotating direction; a first spacer, at least a portion of the first spacer being disposed between the first portion and the housing; and a first driving device connected with the first spacer to control the first spacer to move along a direction of the first axis.

Abstract: A rotor assembly, a compressor and an air conditioner. The rotor assembly includes a first rotor, including a first working portion and a second working portion coaxially arranged, the first working portion and the second working portion are rotatable about a first axis; the first working portion includes a plurality of first helical blades, with a first blade groove being formed between adjacent two of the plurality of first helical blades; at least one first air pressure groove is provided on a first end face of the first working portion away from the second working portion.

Abstract: A rotor assembly, a compressor and an air conditioner are provided. The rotor assembly includes a first rotation shaft and a first rotor rotatably arranged on the first rotation shaft. The first rotor includes a plurality of first screw blades, and a first tooth slot is formed between two adjacent first screw blades; a suction end of the first rotor has at least one oil slinger slot, to allow a lubricant to enter the first tooth slot through the at least one oil slinger slot. It is ensured that the lubricant can fully lubricate and seal the first tooth slot, so that the compressor can run more smoothly, reduce wear of screw blades and improve the service life of the compressor.

Abstract: A rotor assembly, a compressor and an air conditioner. The rotor assembly includes a first rotor, including a first working portion and a second working portion coaxially arranged, wherein the first working portion and the second working portion are rotatable about a first axis; the first working portion includes a plurality of first helical blades, with a first blade groove being formed between adjacent two of the plurality of first helical blades; at least one first air pressure groove is provided on a first end face of the first working portion away from the second working portion; and the first air pressure groove is configured to form a force in a predetermined direction along the first axis when rotating. The rotor assembly can reduce costs of the compressor, simplify structures of moving parts of the compressor, and improve performance and reliability of the compressor.

Abstract: A compressor (200), comprising: a first rotor (20) being rotatable around a first axis (11), the first rotor (20) comprising a first portion (22) and a second portion (24); and a first shaft (10) carrying the first portion (22) and the second portion (24), the first shaft (10) having a first end (12) and a second end (14) that are oppositely arranged, wherein the first rotor (20) is configured to be applied with a preset acting force in a direction from the first end (12) toward the second end (14) or from the second end (14) toward the first end (12) during rotation. The size of the compressor (200) can be reduced with the displacement of the compressor (200) remaining substantially unchanged.

Abstract: A rotor assembly, a compressor and an air conditioner are provided. The rotor assembly includes a first rotation shaft and a first rotor rotatably arranged on the first rotation shaft. The first rotor includes a plurality of first screw blades, and a first tooth slot is formed between two adjacent first screw blades; a suction end of the first rotor has at least one oil slinger slot, to allow a lubricant to enter the first tooth slot through the at least one oil slinger slot. It is ensured that the lubricant can fully lubricate and seal the first tooth slot, so that the compressor can run more smoothly, reduce wear of screw blades and improve the service life of the compressor.

Abstract: A device and a method for picking and collecting Brasenia schreberi based on a machine vision. The device includes a supporting mechanical arm, a collection device, two working mechanical arms, a picking manipulator, a grasping manipulator, a control box, and a visual system. The supporting mechanical arm is fixed on a front end of a boat; the two working mechanical arms are fixed on a front end of the supporting mechanical arm; the picking manipulator and the grasping manipulator are mounted on tail ends of the two working mechanical arms, respectively; and the collection device is fixed on the boat; the visual system determines a location of Brasenia schreberi and sends the location to the control box; the control box controls the two working mechanical arms, the grasping manipulator, and the picking manipulator to complete the grasping and picking of Brasenia schreberi; and the collection device collects Brasenia schreberi.

Abstract: The present invention provides a device and a method for picking and collecting Brasenia schreberi based on a machine vision. The device for picking and collecting Brasenia schreberi includes a supporting mechanical arm, a collection device, two working mechanical arms, a picking manipulator, a grasping manipulator, a control box, and a visual system.

Abstract: The present disclosure relates to a dual-stage compressor, a control method thereof, and an air conditioning unit. The dual-stage compressor includes a low-pressure stage; a high-pressure stage connected in series with the low-pressure stage; and a volume ratio adjustment mechanism arranged at the high-pressure stage and configured to adjust the volume ratio of refrigerant compression at the high-pressure stage. When the final compression pressure of the compressor is lower or greater than the exhaust pressure, the volume ratio adjustment mechanism is operated to increase or reduce the volume ratio of refrigerant compression at the high-pressure stage so that the final compression pressure of the compressor is equal to the exhaust pressure, and overcompression and undercompression are improved to adapt to changes in external conditions, increase the energy efficiency of the compressor, and reduce the noise of the compressor.