Air conditioner adopting exhaust throttling to prevent oil blockage of throttling device and operation method thereof

Abstract

The invention relates to an air conditioner adopting exhaust throttling to prevent oil blockage of a throttling device and an operation method of the air conditioner and discloses the operation methodof the air conditioner. The air conditioner comprises a four-way reversing valve, a stop valve, a throttle valve, a compressor, a liquid storage device, an indoor machine, the throttling device and an outdoor machine, wherein the throttle valve is arranged between the compressor and the four-way reversing valve, or the throttle valve is arranged between the compressor and the four-way reversing valve after being connected in parallel with the stop valve. According to the air conditioner adopting exhaust throttling to prevent oil blockage of the throttling device and the operation method of the air conditioner, the temperature of the compressor is increased in the defrosting process by introducing the throttle valve and the stop valve, so that the low viscosity caused by dissolving a largequantity of refrigerants in a compressor oil pool in the defrosting process can be effectively prevented, and the normal lubrication and sealing of mechanical parts are ensured; and in particular, after the exhaust temperature is increased, oil and gas in an upper shell of a motor are separated more sufficiently, less lubricating oil is brought to a system from an exhaust port, the phenomena of abnormal oil blockage of throttling elements during defrosting and in the early stage of reheating of the system can be effectively avoided, and the operation stability and reliability of an air conditioner system are greatly enhanced.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to an air conditioner and an operating method using exhaust throttling to prevent oil plugging of a throttling device, which improves the problem of high oil circulation rate caused by too low exhaust temperature in the defrosting process of the room air conditioner, and avoids the problem of A series of system problems caused by high oil circulation rate, especially for room air conditioners using R290 refrigerant. Background technique [0002] As a natural working fluid, R290 has zero ODP and close to zero GWP. It has excellent thermodynamic properties and migration properties in the thermal cycle of room air conditioners. Substitute refrigerants for R22 and R410A. The problem of frost is the main factor affecting the normal heating of heat pump units such as room air conditioners in winter, especially in the cold northern regions and the south with high cold...

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Problems solved by technology

[0005] In order to overcome the above-mentioned problems in the prior art, the object of the present invention is to provide an air conditioner and an operating method that uses exhaust throttling to prevent oil plugging of the throttling device. The opening of the element realizes the improvement of the exhaust pressure and the power of the compressor, so that the temperature of the oil pool of the compressor is kept within a set range, which can avoid the low temperature of the oil pool during the defrosting process and the low viscosity caused by dissolving a large amount of refrigerant. Lubrication and sealing problems of bearings, cylinders and other components

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