CN210068547U

CN210068547U - Centrifugal fan for air conditioning system

Info

Publication number: CN210068547U
Application number: CN201920863104.3U
Authority: CN
Inventors: 蔡守亮
Original assignee: Clemente Strapdown Refrigeration Equipment (shanghai) Co Ltd
Current assignee: Clemente Strapdown Refrigeration Equipment (shanghai) Co Ltd
Priority date: 2019-06-10
Filing date: 2019-06-10
Publication date: 2020-02-14
Anticipated expiration: 2029-06-10

Abstract

The utility model discloses a centrifugal fan for an air conditioning system, which comprises a casing, an air guide ring fixed at the air inlet of the casing, an impeller arranged in the casing and a sealing ring arranged between the air inlet end of the air guide ring and the front disc of the impeller, wherein the impeller comprises a front disc butted with the air inlet end of the air guide ring, a flat plate-shaped rear disc and a plurality of blades uniformly fixed between the front disc and the rear disc at intervals; the sealing ring consists of an outer ring, an inner ring and a connecting ring connected between the front end of the outer ring and the rear end of the inner ring; the inner diameter of the outer ring is matched with the outer diameter of the air inlet end of the air guide ring; the inner diameter of the inner ring is in clearance fit with the outer diameter of a front disc of the impeller; the sealing ring is fixed on the outer peripheral surface of the air inlet end of the air guide ring through the outer ring, so that the inner ring of the sealing ring is sleeved outside the front disc of the impeller. The utility model discloses a centrifugal fan can reduce the air current of bypass loss to improve the effective amount of wind that the fan actually provided, reduce power consumption under the prerequisite that reaches the demand amount of wind.

Description

Centrifugal fan for air conditioning system

Technical Field

The utility model relates to a centrifugal fan for air conditioning system.

Background

In the information era, a machine room, a base station and the like are constructed in a large quantity, and according to statistics, the energy consumption of air conditioning systems of the machine room and the base station accounts for 40% -50% of the total energy consumption. The centrifugal fan is an essential part of an air conditioning system of a machine room and a base station, and how to provide larger air volume with smaller power consumption is paid attention by an inner scholars, fan manufacturers and engineering technicians, and technical research is carried out in different forms.

At present, mainstream centrifugal fan manufacturers have carried out some researches on the aspects of fan materials, motor control modes, blade forms and the like, and release related novel products, so that the efficiency of the fan is improved to a great extent. However, most of the centrifugal fans in the current market are shown in fig. 1 to 3 in terms of structure, that is, in order to ensure a better air draft effect, a conical arc-shaped air guide ring 2 is arranged on an air draft opening of an impeller 1 of the fan, the air guide ring 2 is fixed at an air inlet of a casing 3, and a front disc 11 of the impeller 1 is sleeved outside an air inlet end of the air guide ring 2. Because the rotation of the impeller 1 is ensured, a specified gap is required to be kept between the periphery of the front disc 11 of the impeller 1 and the periphery of the air inlet end of the air guide ring 2. At present, gaps of different fan manufacturers are different, but are basically about 10% of the diameter of the impeller 1, so that high-pressure side airflow of the impeller 1 bypasses to the low-pressure side of the impeller 1 through the gaps, the air output of the fan is attenuated to a certain degree, and higher fan power consumption has to be paid to meet the field required air output.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect and provide a centrifugal fan for air conditioning system, it can reduce the air current of bypass loss to improve the effective amount of wind that the fan actually provided, reduce power consumption under the prerequisite that reaches the demand amount of wind.

The purpose of the utility model is realized like this: a centrifugal fan for an air conditioning system comprises a shell, a conical arc-shaped air guide ring fixed at an air inlet of the shell and an impeller arranged in the shell, wherein the impeller comprises a conical arc-shaped front disc, a flat plate-shaped rear disc and a plurality of blades which are uniformly fixed between the front disc and the rear disc at intervals, and the conical arc-shaped front disc is butted with the air inlet end of the air guide ring; the centrifugal fan also comprises a sealing ring arranged between the air inlet end of the air guide ring and the front disc of the impeller; wherein the content of the first and second substances,

the section of the sealing ring is Z-shaped, and the sealing ring consists of an outer ring, an inner ring and a connecting ring connected between the front end of the outer ring and the rear end of the inner ring; the inner diameter of the outer sleeve ring is matched with the outer diameter of the air inlet end of the air guide ring; the inner diameter of the inner ferrule is in clearance fit with the outer diameter of a front disc of the impeller; the sealing ring is fixed on the outer peripheral surface of the air inlet end of the air guide ring through an outer ring, so that the inner ring of the sealing ring is sleeved outside the front disc of the impeller.

In the centrifugal fan for an air conditioning system, the height of the outer ring of the sealing ring is greater than the height of the inner ring.

In the centrifugal fan for an air conditioning system, the sealing ring is made of plastic or metal; if the sealing ring is made of plastic, the sealing ring is fixed on the air guide ring in a glue sticking or riveting mode; if the sealing ring is made of metal, the sealing ring is fixed on the air guide ring in a welding mode.

The utility model discloses a centrifugal fan for air conditioning system, adopt and set up a sealing washer between the entrance point of wind-guiding circle and the front bezel of impeller, pin the clearance between impeller and the wind-guiding circle, the air current direction of the high pressure side direction low pressure side bypass by the fan has not only been changed, the clearance that the bypass air current passes through has also been reduced, and the bypass route of air current has been prolonged, the resistance through increaseing the bypass air current time reduces the air current of bypass loss, thereby improve the effective amount of wind that the fan actually provided, reduce power consumption under the prerequisite that reaches the demand amount of wind. The structure for reducing the bypass of the airflow of the centrifugal fan reduces the bypass airflow from the high-pressure side to the low-pressure side, and improves the air quantity of the centrifugal fan, thereby reducing the power consumption and improving the energy efficiency of a system.

Drawings

FIG. 1 is a schematic diagram of a centrifugal fan for an air conditioning system according to the prior art;

FIG. 2 is an axial cross-sectional view of a prior art centrifugal fan for an air conditioning system;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a schematic structural diagram of a centrifugal fan for an air conditioning system according to the present invention;

fig. 5 is an axial sectional view of a centrifugal fan for an air conditioning system according to the present invention;

fig. 6 is an enlarged view of a portion B in fig. 5.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 4 to 6, the centrifugal fan for an air conditioning system of the present invention includes a casing 3, a conical arc-shaped wind guiding ring 2, an impeller 1 and a sealing ring 4. Wherein:

the air guide ring 2 is fixed at the air inlet of the shell 3;

the impeller 1 is arranged in the casing 3, and the impeller 1 comprises a conical arc-shaped front disk 11 butted with the air inlet end of the air guide ring 2, a flat plate-shaped rear disk 12 and a plurality of blades 10 which are uniformly fixed between the front disk 11 and the rear disk 12 at intervals;

the sealing ring 4 is arranged between the air inlet end of the air guide ring 2 and the front disc 11 of the impeller 1; the section of the seal ring 4 is Z-shaped, and the seal ring 4 is composed of an outer ring 41, an inner ring 42 and a connecting ring 40 connected between the front end of the outer ring 41 and the rear end of the inner ring 42; the inner diameter of the outer ring 41 is matched with the outer diameter of the air inlet end of the air guide ring 2; the inner diameter of the inner ferrule 42 is in clearance fit with the outer diameter of the front disc 11 of the impeller 1; the height of the outer race 41 is greater than the height of the inner race 42; the sealing ring 4 is fixed on the outer peripheral surface of the air inlet end of the air guide ring 2 through an outer ring 41, so that an inner ring 42 of the sealing ring 4 is sleeved outside the front disc 11 of the impeller 1. The sealing ring 4 is made of plastic or metal; if the sealing ring 4 is made of plastic, the sealing ring is fixed on the air guide ring 2 in a glue sticking or riveting mode; if the sealing ring 4 is made of metal, the sealing ring is fixed on the air guide ring 2 by adopting a welding mode.

Therefore, the direction of airflow by bypassing the high-pressure side to the low-pressure side is changed, the gap for bypass airflow to pass through is reduced, the airflow bypass path is prolonged, and the airflow lost by the bypass is reduced by increasing the resistance of the bypass airflow during the bypass airflow, so that the effective air volume actually provided by the fan is improved, and the power consumption is reduced on the premise of achieving the required air volume.

The specific shape of the sealing ring 4 can be adjusted according to the structures of the specific impeller and the air guide ring; the sealing ring 4 is made of plastic or metal, and if the sealing ring 4 is made of plastic, the sealing ring is fixed on the air guide ring 2 in a glue sticking or riveting mode; if the sealing ring 4 is made of metal, the sealing ring is fixed on the air guide ring 2 by adopting a welding mode.

The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, therefore, all equivalent technical solutions should also belong to the scope of the present invention, and should be defined by the claims.

Claims

1. A centrifugal fan for an air conditioning system comprises a shell, a conical arc-shaped air guide ring fixed at an air inlet of the shell and an impeller arranged in the shell, wherein the impeller comprises a conical arc-shaped front disc, a flat plate-shaped rear disc and a plurality of blades which are uniformly fixed between the front disc and the rear disc at intervals, and the conical arc-shaped front disc is butted with the air inlet end of the air guide ring; the centrifugal fan is characterized by further comprising a sealing ring arranged between the air inlet end of the air guide ring and the front disc of the impeller;

2. The centrifugal fan for an air conditioning system according to claim 1, wherein the outer ring of the seal ring has a height greater than a height of the inner ring.

3. The centrifugal fan for an air conditioning system according to claim 1, wherein the sealing ring is made of plastic or metal; if the sealing ring is made of plastic, the sealing ring is fixed on the air guide ring in a glue sticking or riveting mode; if the sealing ring is made of metal, the sealing ring is fixed on the air guide ring in a welding mode.