A rotary compressor

Abstract

The invention discloses a rotary compressor. The rotary compressor comprises an electric structure part and a compressing structure part, wherein the electric structure part comprises a stator and a rotor which are fixedly arranged inside a machine enclosure; the compressing structure part comprises a circular cylinder fixedly arranged on the inner circumference surface of the machine enclosure, as well as an upper bearing and a lower bearing which are tightly attached to the upper and the lower side surfaces of the cylinder and through which a crankshaft penetrates to be supported at the same time; a through hole for penetrating through the upper bearing is formed in an air suction port of the compressor; and the diameter of the through hole is 0.8-1.2mm. According to the compressor disclosed by the invention, during the air suction process of the compressor, a small amount of high temperature gas enters the interior of the cylinder from the through hole, so that the air suction temperature of the compressor is increased, the enthalpy gain effect is achieved, and the exhaust temperature is prevented from being overhigh; and while the air suction capacity of the compressor is improved, the high temperature gas sucked from the through hole is directly merged with a cooling medium entering from the air suction port, so that liquid drops mixed in the sucked cooling medium can be vaporized, liquid hammer is prevented, and the cylinder is prevented from being damaged.

Description

technical field [0001] The invention relates to the field of compressors, in particular to an enthalpy increasing structure of a rotary compressor. Background technique [0002] A heat pump water heater is a device that uses the reverse Carnot principle to transfer heat from a low-temperature object to high-temperature water through a medium. The heat pump device can change the phase of the medium (refrigerant) to become lower than the low-temperature heat source, thereby spontaneously absorbing the heat of the low-temperature heat source; the medium returned to the compressor is compressed into a high-temperature (higher than high-temperature water) high-pressure gas , so as to spontaneously emit heat to a high-temperature heat source; realize a device that transfers heat from a low-temperature heat source to high-temperature water. Since electricity is not directly involved in heating, the required electricity is not much, and the utilization rate of electricity is higher...

AI Technical Summary

Problems solved by technology

[0007] However, at ultra-low temperatures, the refrigerant has excess specific volume and increases the suction capacity of the compressor, resulting in a decrease in heating capacity and a decrease in unit flow rate, which affects the lubrication and cooling inside the compressor.

Moreover, when operating at low temperature, the pressure ratio of suction and exhaust of the compressor is also very large, resulting in excessively high discharge temperature.

At the same time, because the gas inhaled by the suction port at low temperature is prone to contain liquid droplets, resulting in liquid hammer phenomenon, causing damage to the compressor cylinder

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