Reducing two-way throttling short tube

Abstract

The invention relates to a reducing two-way throttling short tube, which is characterized in that the reducing two-way throttling short tube comprises more than two sections of short tubes with different tube diameters. The short tubes are sequentially arranged according to the magnitude of inner tube diameter and are mutually and serially connected to form the reducing two-way throttling short tube. The length of each short tube is 2mm to 30mm. The inner tube diameter D1 of a first tube (5) at a head end is the smallest and is 0.4mm to 1.1mm, the inner tube diameter D2 of a second tube (7) close to the first tube (5) is 1.1-2 times of D1, the inner tube diameter D3 of a third tube close to the second tube (7) is 1.1-2 times of D2, the inner tube diameter of an nth tube is 1.1-2 times of the inner tube diameter of an (n-1)th tube by parity of reasoning and the inner tube diameter of the nth tube at a tail end is the largest, wherein the n is a natural number. The reducing two-way throttling short tube has the advantages that since one-way valves are not used, the production cost is reduced; since craters are reduced, the potential leakage is reduced; and the vibrating noises produced by the one-way valves are fully avoided.

Description

technical field [0001] The patent of the present invention relates to a throttling technology of a refrigeration system, in particular to a variable-diameter two-way throttling short tube technology in the refrigeration system of a heating and cooling air conditioner that performs cooling and heating operations. Background technique [0002] Refrigeration equipment such as cooling and heating dual-purpose air conditioners, when performing cooling and heating operations, the refrigerant flow requirements in the two operating modes are different; different lengths to achieve, in the design usually adopt such as figure 1 Structure. During refrigeration operation, the refrigerant enters from the A end of the first capillary tube (1), and flows out directly through the E end of the one-way valve 2 after being throttled by the first capillary tube (1). During the heating operation, the refrigerant enters from the E end of the one-way valve 2, due to the blocking effect of the on...

AI Technical Summary

Problems solved by technology

The main problem with this structure is that a one-way valve is added to the throttling system, which not only increases the material cost, but also increases the leakage of the welding port and the noise generated by the one-way valve.

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