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Magnetic stirrer

A magnetic stirrer and magnetic field technology, applied in chemical instruments and methods, dissolution, mixers, etc., can solve the problems of small stirring torque, upper limit of rotation speed, limitation of rotation amplitude and rotation frequency, etc., and achieve the effect of accelerating chemical reaction speed

Pending Publication Date: 2019-01-25
航天环保(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The magnetic stirrer currently used includes a base, a control circuit, a panel, a motor and a permanent magnet. Its working principle is: the motor drives the permanent magnet to rotate to generate a rotating magnetic field, and the rotating magnetic field drives the stirrer in the liquid in the container to move circularly. The stirring torque Small, and the speed of the motor has an upper limit, the rotation range and frequency of the stirrer in the liquid are limited

Method used

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Examples

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no. 1 example

[0020] figure 1 It is the circuit diagram of the magnetic stirrer provided by the first embodiment of the present invention, as figure 1 As shown, the magnetic stirrer provided by the present invention includes a processor 20 and a rotating magnetic field generator, and the rotating magnetic field generator includes N resonant magnetic field generating units 30 that respectively generate N different phases, and the N is an integer greater than or equal to 3 . The resonant magnetic field generating unit includes a resonant circuit and a driver that provides a square wave signal to the resonant circuit according to a control signal provided by a processor, and the resonant circuit at least includes a coil and a capacitor. Preferably, the resonant circuit is a series resonant circuit composed of a coil and a capacitor. More preferably, the resonant tank includes a first capacitor C1, a coil L and a second capacitor C2 connected in series in sequence. According to an embodiment...

no. 2 example

[0026] Figure 4 It is the circuit diagram of the magnetic stirrer provided by the second embodiment of the present invention. Figure 4 The magnetic stirrer shown with the figure 1 The shown magnetic stirrer has basically the same composition, the only difference is that frequency synthesizer 41 and frequency synthesizer 42 are used to replace figure 1 DDS31 and DDS32 in. The following focuses on combining Figure 5 describe Figure 4 in the frequency synthesizer.

[0027] Figure 5 is the circuit diagram of the frequency synthesizer provided by the second embodiment of the present invention. Such as Figure 5 As shown, the frequency synthesizer includes: a first signal generator for generating a first signal; a second signal generator for generating N second signals, where N is an integer greater than or equal to 4; a mixer 14, Its first signal input terminal is connected to the first signal generator, and the second signal input terminal is connected to the second s...

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Abstract

A magnetic stirrer comprises a processor and a rotary magnetic field generation device, and is characterized in that the rotary magnetic field generation device comprises N resonance magnetic field generation units which separately generate N different phases, and N is an integer which is greater than or equal to 3; and each resonance magnetic field generation unit comprises a resonance loop and adriver which provides square signals for the resonance loop according to control signals provided by the processor, and the resonance loop at least comprises a coil and a capacitor. By the provided magnetic stirrer, the magnetic field intensity and frequency can be controlled as needed, and the chemical reaction speed is greatly increased.

Description

technical field [0001] The invention relates to a magnetic stirrer, which belongs to the technical field of automatic control. Background technique [0002] In order to speed up the chemical reaction, magnetic stirrers are widely used in chemical, medical, biochemical laboratories, analysis rooms, biology, genetics, pharmaceuticals, environmental protection laboratories, food, epidemic prevention, medical and other scientific research departments of the school. Magnetic stirrers are suitable for For stirring liquids or solid-liquid mixtures with low viscosity, put the stirrer into the liquid in the container when using it. When a rotating magnetic field is generated under the panel, it will drive the stirrer to move in a circular motion to achieve the purpose of stirring the liquid. The magnetic stirrer currently used includes a base, a control circuit, a panel, a motor and a permanent magnet. Its working principle is: the motor drives the permanent magnet to rotate to gener...

Claims

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Application Information

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IPC IPC(8): B01F13/08
CPCB01F33/451
Inventor 舒小明舒畅
Owner 航天环保(北京)有限公司