Supercooling device, air conditioner with device and method for controlling refrigerant flow of air conditioner

Abstract

The invention provides a supercooling device, which comprises a shell and tube type condenser comprising a supercooling tube area, an electronic expansion valve and a supercooler, wherein a refrigerant outlet of the shell and tube type condenser is communicated with an inlet of a first refrigerant channel through the electronic expansion valve, and is directly communicated with an inlet of a second refrigerant channel. In addition, the invention also provides an air conditioner comprising any supercooling device. Furthermore, the invention provides a method for controlling refrigerant flow in any air conditioner, which comprises the following steps of: detecting temperature and pressure of a gaseous refrigerant at the outlet of the first refrigerant channel of the supercooler; calculating superheat degree according to the detected temperature and pressure; and comparing the calculated superheat degree with the preset suction superheat degree, and determining whether to adjust the opening of the electronic expansion valve in the supercooling device according to the compared result. The supercooling degree of the refrigerant is improved and the refrigerating capacity of unit refrigerant is improved by means of the supercooling tube area and the supercooler.

Description

Technical field [0001] The invention relates to a supercooling device, an air conditioner having the supercooling device, and a method for controlling the flow of refrigerant in the air conditioner. Background technique [0002] In the prior art scheme, the condenser has only a condenser tube and no supercooling tube concept. The condensation and supercooling of the refrigerant are all done by the condenser tube. The lower condenser tube is immersed in the liquid refrigerant and cannot conduct condensation heat exchange, resulting in reduced condensation effect. , Resulting in an increase in unit power and a decrease in energy efficiency. The upper condensing tube has a supercooling effect on the lower part of the copper tube, which causes the supercooling effect to decrease, and the supercooling degree is generally 1-2 degrees. Taking into account the impact of pipeline resistance loss, some liquid flashes before the expansion valve, resulting in a decrease in refrigeration cap...

AI Technical Summary

Problems solved by technology

[0002] The existing technical scheme of the condenser only has the concept of a condensing tube but no supercooling tube. The condensation and supercooling of the refrigerant are both completed by the condensing tube. The lower condensing tube is soaked in the liquid refrigerant, which cannot perform condensation and heat exchange, resulting in a decline in the condensation effect , resulting in an increase in unit power and a decrease in energy efficiency

The upper condensing pipe has a supercooling effect on the lower part, and the copper pipe will affect the supercooling effect, and the supercooling degree is generally 1-2 degrees.

Considering the influence of pipeline resistance loss, part of the liquid in front of the expansion valve flashes, resulting in a decrease in refrigeration capacity and an increase in refrigerant charge

A large number of condensation pipes cannot effectively reduce the condensation temperature and increase the subcooling degree, resulting in a large amount of material waste

[0003] Due to various reasons (no secondary interface, suction with liquid, etc.), the traditional centrifugal unit cannot use a multi-stage supercooling device, and basically adopts the condenser supercooling method. Cold, in order to improve the effect of charging more refrigerant, its supercooling effect is limited, only at 1-2 degrees

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