Secondary throttle pipe-in-pipe recooling device for air conditioner

Abstract

The invention provides a secondary throttle pipe-in-pipe recooling device for an air conditioner. The secondary throttle pipe-in-pipe recooling device is connected with a primary throttling device on a refrigeration loop of the air conditioner and comprises a secondary throttle heat exchanger, a throttling piece and a gas-liquid separator; the secondary throttle heat exchanger comprises a first red copper pipe, a second red copper pipe, a third red copper pipe and a fourth red copper pipe which are connected with one another through welding; the third red copper pipe is communicated with the first red copper pipe and the second red copper pipe; an opening end of the fourth red copper pipe penetrates through the first red copper pipe and the second red copper pipe respectively; an access port of the first red copper pipe and an access port of the fourth red copper pipe are connected with each other in parallel through the throttling piece and are connected with a condenser; and an access port of the second red copper pipe and an access port of the fourth red copper pipe are connected with each other in parallel through the throttling piece and are connected with an evaporator. In the invention, a part of throttled low-temperature saturated liquid is used to reduce an enthalpy value of the liquid output from the condenser and increase the enthalpy value of the low-temperature evaporation liquid; the heat exchange area of the condenser is reduced; and reliability of the system and performance coefficient of the air conditioner are improved.

Description

technical field [0001] The invention relates to an air conditioner, in particular to a tube-in-tube recooling device for a secondary throttling tube of the air conditioner. Background technique [0002] A general air conditioner includes a condenser, an evaporator, a compressor, and a number of refrigerant delivery pipes connected between the three. A throttling device is provided on the delivery management connected between the condenser and the evaporator, which can improve the quality of the refrigerant medium. The running state of the air conditioner can reduce the power consumption of the whole machine and improve the energy efficiency ratio of the air conditioner. Engineers and technicians have improved the throttling device, as our company disclosed a secondary throttling and recooling device of an air conditioner in Chinese Patent Document No. CN101329124A on December 24, 2008. The primary throttling device is connected, the secondary throttling recooling device and...

AI Technical Summary

Problems solved by technology

The copper tube described in this patent is designed to have a large volume of hollow cavity, adding a lot of refrigerant, which increases the manufacturing cost, and the copper tube is a small spiral copper tube, the manufacturing process is relatively complicated, and the spiral The pipe wall will collide violently with the refrigerant coming out of the condenser, making a chirping noise, and energy will be lost in the collision, which is not conducive to improving the energy efficiency ratio of the air conditioner system

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