A centrifugal fan, a manufacturing method of the centrifugal fan, and an air conditioner having the centrifugal fan

Abstract

The invention relates to the field of fans, in particular to a centrifugal fan, a manufacturing method of the centrifugal fan and an air conditioner having the centrifugal fan. The centrifugal fan comprises an impeller, and multiple blades respectively connected with the impeller at two ends, wherein at least one blade is provided with a cavity structure inside. The scheme reduces the total weight of the fan, reduces the load and the energy consumption of a motor for driving the fan, and prolongs the service life of the motor. The manufacturing method of the centrifugal fan comprises the following steps: when the filling volume of plastics for manufacturing the blades of the centrifugal fan in a molding cavity reaches a certain value q, inertia high-pressure gas is filled, and the high-pressure gas pushes the molten plastics to continuously fill in the molding cavity, so that the internal of the plastic piece expands to form the cavity structure. The method can save the plastic raw materials for manufacturing the fan, shortens the product molding period, improves the production efficiency, reduces the pressure in the molding cavity, reduces the mold loss, and prolongs the mold service life.

Description

technical field [0001] The invention relates to the field of fans, in particular to a centrifugal fan, a manufacturing method of the centrifugal fan and an air conditioner with the centrifugal fan. Background technique [0002] In the prior art, most of the fans installed in the air conditioner are injection molding or sheet metal parts, and the leaf shapes are solid structures. For small solid fans, because they are small and light in weight, the influence of the weight of the fan itself on the motor is not obvious, and the power and temperature rise of the motor will not be significantly affected. However, for large and medium-sized fans, because of their large structure and heavy weight, they can easily weigh several kilograms, which has a great impact on the performance of the motor, and the temperature rise of the motor will also increase accordingly. When the motor is running, the greater the output power, the greater the current and loss, and the higher the temperatu...

AI Technical Summary

Problems solved by technology

However, for large and medium-sized fans, because of their large structure and heavy weight, they can easily weigh several kilograms, which has a great impact on the performance of the motor, and the temperature rise of the motor will also increase accordingly.

When the motor is running, the greater the output power, the greater the current and loss, and the higher the temperature. When the motor is operated in a high temperature environment for a long time, it may cause significant changes in the physical, mechanical, chemical and electrical properties of the insulating material or Cause rapid aging, shorten the service life of the motor and increase the input power, which affects the energy consumption of the whole machine

[0003] In addition to the above disadvantages, high-mass fans also need a large amount of plastic raw materials to manufacture such high-quality fans, which wastes a lot of plastic raw materials; in addition, because the fan has a solid structure, the production and molding cycle of the fan product is longer. , the production efficiency is low; and it causes greater pressure in the cavity of the fan, which speeds up the loss of the mold and reduces the service life of the mold, etc.

And the noise of the solid fan is relatively large when it is working

[0004] In response to the above problems, a new centrifugal fan is urgently needed to solve the problem that the centrifugal fan in the prior art has a large mass, which leads to high energy consumption of the motor driving the fan and shortens the service life of the motor.

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