Air conditioner

Abstract

The invention discloses an air conditioner. The air conditioner comprises a compressor, an evaporator, a condenser, a liquid storage tank and a control device, wherein the compressor is provided with a gas discharge port and a gas return port; a first end of the evaporator is connected with the gas return port, and a first gas phase area and a liquid phase area below the first gas phase area are arranged in the evaporator; a first end of the condenser is connected with the gas discharge port, and a second gas phase area is arranged in the condenser; the liquid storage tank is provided with a liquid taking port, a gas outlet, a high pressure inlet and an oil return port, the liquid taking port is connected with the liquid phase area through a liquid taking pipeline, the oil return port is communicated with an oil tank of the compressor through an oil return pipeline, the high pressure inlet is communicated with the gas discharge port through a gas discharge pipeline to facilitate discharge of a high-temperature and high-pressure gaseous refrigerant into the liquid storage tank, and the gas outlet is communicated with the gas return port through a gas return pipeline. According to the air conditioner, continuous liquid taking can be realized, high-purity lubricant can be obtained, and a Venturi ejector is not needed.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner. Background technique [0002] In the prior art, a Venturi ejector and a purification tank are generally used to form the oil return system of the refrigeration unit. The Venturi ejector has a very small throat, which is easily blocked by foreign matter and difficult to clean after being blocked. Generally, it needs to be replaced as a whole, which increases the cost. Moreover, this oil return system has a poor separation effect on the refrigerant and the lubricating oil, and there is still a large amount of refrigerant in the purified lubricating oil, which affects the temperature and viscosity of the lubricating oil in the compressor oil tank. In addition, in the oil return process of this oil return system, the liquid extraction stage, the extraction stage and the oil return stage are carried out simultaneously, and it is impossible to individually...

AI Technical Summary

Problems solved by technology

The Venturi ejector has a very small throat, which is easily blocked by foreign matter and difficult to clean after being blocked. Generally, it needs to be replaced as a whole, which increases the cost

Moreover, this oil return system does not have a good separation effect on the refrigerant and lubricating oil. There is still a large amount of refrigerant in the purified lubricating oil, which affects the temperature and viscosity of the lubricating oil in the compressor oil tank.

In addition, in the oil return process of this oil return system, the liquid extraction stage, the extraction stage and the oil return stage are carried out at the same time, and it is impossible to individually control a certain stage of the oil return process according to the oil return demand of the refrigeration unit

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