A vertical two-stage scroll compressor

Abstract

The invention discloses a vertical bipolar scroll compressor. The vertical bipolar scroll compressor comprises an upper cover, wherein a closed area formed by the upper cover, a housing and a lower cover is divided into a chamber I and a chamber II by a high-low pressure partition plate; a motor stator is fixedly arranged in the chamber II, and a motor rotor is fixedly connected with a movable scroll through a driving crankshaft; the movable scroll is provided with scroll teeth on two sides; a lower side scroll tooth of the movable scroll is matched with a lower fixed scroll to form a low-pressure stage compressor; an upper side scroll tooth of the movable scroll is matched with an upper fixed scroll to form a high-pressure stage compressor; and an exhaust port of the high-pressure stage compressor penetrates through a high-low pressure isolation plate to be communicated with the cavity I. The whole structure of the compressor is similar to a vertical inner low-pressure structural compressor; the overall oil output of the compressor can be controlled, so that oil can be reasonably supplied; the air force at two sides of the movable scroll are reasonably distributed, so that the axial force of the movable scrolls can be minimized, and as a result, the overall power consumption is reduced, and the overall reliability is improved.

Description

technical field [0001] The invention relates to the technical field of refrigeration scroll compressors, in particular to a vertical two-stage scroll compressor. Background technique [0002] In the prior art, a compressor with a double-stage scroll structure with the application number "CN201710928501.X" includes a casing, and a horizontal and straight drive crankshaft is arranged in the casing, and a bearing support I is installed on one end of the drive crankshaft, and the bearing support I Fixed scroll Ⅰ and movable scroll Ⅰ are installed on the outer side of the crankshaft, and anti-rotation mechanism Ⅰ is installed between the movable scroll Ⅰ and bearing support Ⅰ; the other end of the drive crankshaft is equipped with bearing support Ⅱ, and the outer side of bearing support Ⅱ is installed with fixed scroll. Scroll II, movable scroll II, anti-rotation mechanism II is installed between the movable scroll II and the bearing support II, and the outer side of the fixed sc...

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Problems solved by technology

[0003] However, the above-mentioned two-stage scroll compressor still has obvious defects in the use process: 1. The oil discharge volume of the compressor is relatively high. Since the previous patented technology adopts a horizontal structure, the high oil discharge volume is inherent Defects, difficult to control, so the refrigeration system needs to be equipped with an oil separation and oil cooling system, which increases the complexity of the heat pump system to a certain extent, and also increases the cost of the whole machine; 2. The oil supply method of the internal bearing of the compressor is a differential pressure supply Oil, the oil supply in the differential pressure oil supply method is only related to the pressure difference and has nothing to do with the shaft speed. For the inverter compressor, the oil supply pressure difference is exactly the same under the same working conditions, but the compressor speed changes greatly , but the demand for oil is different when the compressor operates at 20Hz and 120Hz, which limits the speed range of this type of compressor to a large extent, and affects the operating range of the whole machine to a certain extent; 3. At present, the heat pump The system mainly uses vertical compressors, and horizontal compressors are mainly used in vehicles, which cannot be fully matched with existing heat pump system accessories, which will increase system production costs to a certain extent

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