Air duct cover assembly of refrigerator, cabinet of refrigerator and air-cooled refrigerator

Abstract

The invention provides a refrigerator air duct cover plate component, a refrigerator cabinet and an air-cooled refrigerator. The refrigerator air duct cover plate component comprises an air duct cover plate and a motor holder. An air opening t is arranged on the air duct cover plate. The motor holder is fixed on the air duct cover plate and positioned at the air opening. A refrigerator fan component is mounted on the motor holder, and blades of the fan component are positioned in the air opening. The axial distance and / or the radial distance between the tip of each blade and the motor holder are / is 15-24mm. According to the refrigerator air duct cover plate component, noise and local resistance generation mechanisms are combined effectively, key influence parameters and structures are identified, control and innovation are performed to enable the axial distance and the radial distance between the tip of each blade and the motor holder to be 15-24mm, so that low windage and low noise of the motor holder are realized, refrigerating efficiency of the refrigerator is improved, and air duct resistance is reduced; actual measurement indicates that airflow resistance of the motor holder is reduced by about 20%, noise is reduced by about 3dB, and product quality is effectively improved.

Description

Technical field [0001] The present invention relates to the field of household appliances, and more specifically, to an air duct cover assembly of a refrigerator, a refrigerator box containing the air duct cover assembly, and an air-cooled refrigerator containing the box. Background technique [0002] The fluid noise of the ventilation system is one of the noise sources of air-cooled refrigerators. Among them, the motor support 11' on the air duct cover assembly has a great influence on the system air duct fluid noise. The current motor support 11' has a structure such as figure 1 As shown, the motor support 11' is a three-rib support type motor support, the inner side of the ribs is exactly flush with the air opening 13' on the air duct cover 14', and the air outlet side 131' of the air opening 13' has a guide The wind rib 12', the fan assembly and the motor bracket 11' are assembled as figure 2 Shown. [0003] The existing air duct cover plate assembly has the following defects...

AI Technical Summary

Problems solved by technology

[0004] The motor bracket on the air duct cover plate does not consider the impact on fluid noise. Since the inner side of the rib is flush with the air outlet, the radial gap a between the tip of the fan blade and the rib is very small, only 5mm, and the The axial gap b between the tip of the blade and the top of the rib is also very small, only 8mm. Since the fan blade tip rotates at the fastest speed, the axial and radial gaps between the blade tip and the rib are too small, and the disturbance to the air is severe, resulting in turbulent air flow The degree of turbulence increases, because the degree of turbulence is directly related to the size of the fluid noise, which leads to an increase in system noise; in addition, the air guide rib is set on the outlet side of the air outlet of the air duct cover, and the existence of the air guide rib causes the air inlet of the air outlet The local air flow organization on the side is not smooth, resulting in increased gas turbulence, enhanced gas turbulence and turbulence, causing increased noise, and at the same time increasing the noise, the air duct (enclosed by the rear wall of the refrigerator tank and the air duct cover plate) into) resistance also has an adverse effect, resulting in an increase in local resistance at the motor bracket and a decrease in air volume

Images