Throttling device and air conditioner adopting same

Abstract

The invention discloses a throttling device, which includes an electronic expansion valve, and is characterized in that a one-way valve and a capillary tube are connected to form a bypass over the electronic expansion valve; the one-way valve and the capillary tube are connected in series, so as to form a capillary tube one-way valve assembly. The invention further discloses an air conditioner including the throttling device, which is characterized in that an indoor unit of the air conditioner includes a blower system, and an evaporator component welded on a public pipeline of the throttling device. According to the invention, the one-way valve is closed when the throttling device is used for refrigeration, and is conducted when the throttling device is used for heating; the by-pass capillary tube is adopted to reduce the partial pressure difference of a cooling medium, and reduce the phase change speed of the cooling medium and the cavitation degree, so that ear-piercing noise and cooling medium impulsive vibration caused by the cavitation effect of the cooling medium can be reduced, and the sound quality during the operation of the air conditioner is greatly improved.

Description

technical field [0001] The invention relates to a throttling device and an air conditioner using the throttling device, belonging to the field of heating, ventilation and air conditioning. Background technique [0002] The throttling device is an indispensable key component in the entire HVAC field, especially the air conditioner. The electronic expansion valve is widely used in multi-line air conditioners because it can change the opening degree at will within a certain range and change the local refrigerant flow and pressure drop. system. In order to ensure smooth oil return of the air conditioning system, reduce the accumulation of liquid refrigerant in the indoor unit, and improve the energy efficiency of the entire air conditioner, when the multi-split system is in heating operation, the electronic expansion valve of the indoor unit of the air conditioner in standby mode cannot be completely closed. And keep a very small opening. Due to the serious mutation of the pip...

AI Technical Summary

Problems solved by technology

Due to the serious mutation of the pipe diameter under the small opening of the electronic expansion valve, the local resistance increases sharply

When the liquid refrigerant mixed with air bubbles passes by, on the one hand, the liquid refrigerant will produce a large cavitation effect due to throttling pressure drop, causing piping vibration and discontinuous cavitation noise; on the other hand, the gas-liquid two-phase coexistence passes through the valve hole Congestion will also be formed when the air conditioner is used, thereby increasing the pulsating vibration and noise, which will eventually affect the sound quality and noise value of the air conditioner, and easily cause noise complaints in the market

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