Fan cover and air conditioner

[0029] Example one

[0030] The fan cover of the embodiment of the present invention, such as Figure 4 As shown, the windward surface of the radial rib 1 along the circumferential component of the airflow is the second side surface 14, which is recessed to form a curved surface along the axial middle of the fan cover in a direction away from the center of the fan cover. Similar to the first side surface 12, the tangential direction of the air inlet end 11 of the second side surface 14 ( Figure 4 Middle, dotted line c 3 The direction shown) and the tangential direction of the air outlet 13 ( Figure 4 Middle, dotted line c 4 The direction shown) is at a certain angle, and along the axial direction of the fan cover, from the air inlet end 11 to the air outlet end 13 of the radial rib 1, the angle between the tangent direction of the second side 14 and the axial direction of the fan cover gradually Become smaller. When the airflow passes through the second side 14 of the radial rib 1, the second side 14 can guide the airflow to generate a deflection in the opposite direction to the direction when the airflow enters the air inlet end 11 of the radial rib 1, so as to reduce or even eliminate The circumferential component of the airflow. The first side surface 12 and the second side surface 14 work together so that the airflow can flow more concentratedly along the axial direction of the fan cover, so that the airflow can be more easily discharged from the installation cavity of the outdoor unit of the air conditioner, thereby enhancing the heat exchange capacity of the air conditioner.

[0031] It should be noted that the principles of the first side surface 12 and the second side surface 14 for guiding the airflow direction are different; the first side surface 12 uses the Coanda effect of the fluid to guide the flow direction of the airflow, and the second side surface 14 uses the second side surface 14 itself. The air duct is formed to guide and change the direction of air flow. The first side surface 12 and the second side surface 14 jointly guide the flow direction of the airflow, so as to reduce the deflection of the airflow in the circumferential direction of the fan cover, and flow along the axial direction of the fan cover to the greatest extent.

[0032] In order to reduce the resistance of the second side surface 14 to the air flow, the tangential direction of the air inlet end 11 of the second side surface 14 is parallel to the direction of the air flow entering the air inlet end 11 of the radial rib 1. At the same time, in order to enable the airflow guided by the second side surface 14 to flow along the axial direction of the fan cover, the tangential direction of the air outlet end 13 of the second side surface 14 is parallel to the axial direction of the fan cover. The first side surface 12 uses the Coanda effect of the fluid to guide the direction of the airflow to change. The first side surface 12 has a small resistance to the airflow, while the second side surface 14 uses the formed air duct to guide the direction of the airflow to deflect, and the resistance to the airflow The effect is greater. Therefore, when the airflow entering the air inlet end 11 of the radial rib 1 deflects greatly in the circumferential direction of the fan cover, in order to reduce the resistance of the second side 14 of the radial rib 1 to the airflow, the first The tangential direction of the air outlet end 13 of the two side surfaces 14 may also have a certain angle with the axial direction of the fan cover.

[0033] Example two

[0034] The fan cover of the embodiment of the present invention, such as Figure 5 As shown, the windward surface of the radial rib 1 along the circumferential component of the airflow is the second side surface 14, and the second side surface 14 is a plane along the axial direction of the fan cover. It should be understood that "the second side surface 14 is a plane along the axial direction of the fan cover" specifically refers to, for example, Figure 5 As shown, the second side surface 14 extends along a straight line in the axial direction of the fan cover; the second side surface 14 itself has an extension along the radial direction of the fan cover and an extension along the axial direction of the fan cover. The two side surfaces 14 are flat surfaces. Compared with the first embodiment, the second side surface 14 is recessed along the axial middle of the fan cover to the leeward side of the radial rib 1 along the circumferential component of the airflow to form a curved surface, and the second side surface 14 is along the axial direction of the fan cover. The curve extends. In the fan cover of the embodiment of the present invention, the second side surface 14 is a straight line along the axial direction of the fan cover, the structure is simple, and the manufacturing cost is low.

[0035] When the second side surface 14 is flat along the axial direction of the fan cover, such as Figure 5 with Image 6 As shown, the second side surface 14 forms an angle α with the axis of the fan cover, and the airflow direction entering the air inlet end 11 of the radial rib 1 forms an angle β with the axial direction of the fan cover, where α≤β. When α

[0036] It should be noted that the reason why the extension direction of the second side surface 14 is not directly arranged along the axial direction of the fan cover is to reduce the resistance of the second side surface 14 to the airflow. If the extension direction of the second side surface 14 is set to be the same as the axial direction of the fan cover, although the airflow can flow along the axial direction of the fan cover to the greatest extent. However, when the airflow entering the air inlet end 11 of the radial rib 1 has a larger component in the circumferential direction of the fan cover, when the airflow enters the radial rib 1, the angle between the airflow and the second side surface 14 is larger. The side surface 14 has great resistance to the airflow, which affects the speed of the airflow and is not conducive to the airflow from the outdoor unit. Therefore, it is necessary to specifically adjust the angle between the second side surface 14 and the axis of the fan cover according to the magnitude of the circumferential component of the airflow rotating in the circumferential direction of the fan cover.

[0037] Since the airflow entering the fan cover has a circumferential component that rotates in the circumferential direction of the fan cover, in order to reduce the resistance of the radial ribs to the airflow, the radial ribs 1 are arranged to be bent along the radial direction of the fan cover, and from close to the axis of the fan cover The radial rib 1 is bent to the leeward side of the circumferential component of the airflow entering the air inlet end 11 of the radial rib 1 to the end far away from the axis of the fan cover. At this time, the bending direction of the radial rib 1 is consistent with the spiral direction when the airflow enters the fan cover, which can reduce the resistance of the radial rib 1 to the airflow. Such as figure 1 As shown, when the component of the airflow entering the fan cover in the circumferential direction of the fan cover is the counterclockwise rotation of the airflow, from the end close to the axis of the fan cover to the end away from the axis of the fan cover, the radial rib 1 runs in the counterclockwise direction bending. Similarly, when the component of the airflow entering the fan cover in the circumferential direction of the fan cover is the rotation of the airflow in the clockwise direction, from the end close to the axis of the fan cover to the end far away from the axis of the fan cover, the radial rib 1 runs in the clockwise direction bending.

[0038] Reference Figure 4 , From the air inlet end 11 to the air outlet end 13 of the radial rib 1, the thickness of the radial rib 1 gradually increases. The air inlet end 11 of the radial rib 1 has a small thickness to reduce the resistance of the air inlet end 11 of the radial rib 1 to the air flow; the air outlet end 13 of the radial rib 1 has a larger thickness. Strengthen the structural strength of the radial rib 1. On the other hand, the air outlet end 13 of the radial rib 1 is installed facing outwards. Increasing the thickness of the air outlet end 13 of the radial rib 1 can passivate the radial rib 1. Air end 13, when installing and replacing the fan cover, it can prevent the fan cover from cutting the human body.

[0039] The fan cover of the embodiment of the present invention, such as figure 1 As shown, it also includes a plurality of circumferential ribs 2, each circumferential rib 2 is arranged along the circumferential direction of the fan cover, and the multiple circumferential ribs 2 are arranged at intervals along the radial direction of the fan cover, and each adjacent There is a gap between the two circumferential ribs 2 so that the airflow can pass through the gap of the fan cover. The circumferential ribs 2 and the radial ribs 1 cross each other, and the circumferential ribs 2 and the radial ribs 1 form a mesh structure, which can prevent debris from entering the outdoor unit of the air conditioner through the fan cover.