Frequency-conversion direct-current aerator

Abstract

The invention discloses a frequency-conversion direct-current aerator. The aerator includes impellers, a floating body, a frequency conversion controller and a motor, wherein the motor is arranged on the floating body, the frequency conversion controller and the motor are sequentially connected, and the motor is connected to the impellers. The frequency-conversion direct-current aerator is characterized in that the frequency conversion controller converts an alternating current into a direct current and then outputs the direct current to the motor. The frequency-conversion direct-current aerator can directly use electric supply without constraint of three-phase electricity, and therefore the aerator has the advantages of being capable of saving more energy and electric power, less in energy consumption, endurable to high temperature, long in service life, convenient to install, and great in aeration and water stirring effects.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a frequency conversion aeration machine using direct current. Background technique [0002] The aeration machine is a commonly used machine in the fishery and aquaculture industry. It drives the working parts through a power source such as an electric motor or a diesel engine, so that the "oxygen" in the air is quickly transferred to the equipment in the aquaculture water body. The machine is mainly used to increase The oxygen content in the water can ensure that the fish and other organisms in the water will not be hypoxic, and at the same time, it can also inhibit the growth of anaerobic bacteria in the water and prevent the deterioration of the pool water from threatening the living environment of the island fish. The machine generally uses its own air pump to drive air into the water, so as to achieve the purpose of increasing the oxygen content in the water. ...

AI Technical Summary

Problems solved by technology

The rotor with this structure has the following problems in the manufacturing process: when applying glue to each dovetail groove between the two dovetail groove projections, because of the dovetail groove of the dovetail groove projection, the glue is directly from the outer surface. It is inconvenient to smear, and glue smear is also easy to smear unevenly. When installing, push the magnetic steel sheet 13 from one side of the outer surface 111 of the fitting cylinder, and gradually push the inner surface 131 of the magnetic steel sheet 13 to completely fit the cylinder. The outer surface 111 of the cylinder. During the pushing process, the glue applied on the outer surface of the cylinder is pushed out, so that the glue on the inner surface of the magnetic steel sheet and the outer surface 111 of the cylinder is missing and the glue is uneven, which may cause the process. Repeated glue application affects the firmness between the magnetic steel sheet and the cylinder, reducing the service life of the entire rotor

In addition, this kind of rotor is easy to wear out the magnetic steel sheet during use, and the magnetic steel sheet on the rotor cylinder is easy to degumming, falling off or even cracking

[0005] In traditional aerators, there are two common structures for the impeller setting. One impeller type uses a metal impeller. The impeller is set at the center of the aerator under the motor. This structure has limited impeller rotation space, and the amount of oxygen that can be increased is limited by the power of the motor. 1. The size of the impeller has a great influence, the contact area between the impeller and the air is limited, the amount of oxygen added to the water body in a unit time is limited, and the noise is relatively large during operation; the other is the waterwheel type, and the impeller speed of this structure is not high , the lifting force on the bottom layer is not large, so it will not "arch the bottom of the pool", the weight of the whole machine is also light, it has a strong push flow ability and a certain mixing ability, and can obtain a better oxygen-liquid contact area and increase oxygen. The efficiency is high, but the impeller used in the traditional waterwheel type has the following defects: 1. The entire impeller is integrally formed of plastic material, and the entire impeller needs to be replaced if it is partially damaged; 2. Another impeller is a polygonal runner and the corresponding runner The variable number of blades are connected by plugging. Each side of the runner is provided with a protruding strip with the same length as the side, and the blade is provided with a slot with the same length as the side. When this structure is installed, due to the slot, The protruding strip is as long as the side, and requires a lot of force to achieve full engagement, and when installing the blade on one side, it is easy to touch the two adjacent blades on the side, so the installation space is limited, and the installation of the blade and the runner is very difficult. Inconvenient; 3. Most of the blade structures are through-holes in the middle, the impeller rotates, and the water flows directly through the holes. The water body of this structure passes through the through-holes in a large amount, and the resistance to the blades is also relatively large. The contact with the air The area is small, and the oxygen in the air cannot be effectively exchanged with the water body.

Images