Control system of semiconductor temperature control box

Abstract

The invention discloses a semiconductor temperature control box. The semiconductor temperature control box comprises a power supply circuit, a single-chip controller, a semiconductor refrigeration chip and a control circuit thereof, wherein the power supply circuit is a power supply for supplying electricity to the semiconductor refrigeration chip and a conversion circuit for supplying electricity to a hardware circuit; the single-chip controller is a system control core, and outputs a control signal of the refrigeration chip according to a set function; and the control circuit receives a single-chip control signal, and outputs driving signals for controlling the working mode and the power of the semiconductor refrigeration chip. The semiconductor temperature control box uses a single-chip for designing a control program, uses the control circuit for simply and flexibly converting the working mode and adjusting and controlling the power of the semiconductor refrigeration chip, and can realize high-precision heating / refrigeration dual-mode constant-temperature control effect.

Description

technical field [0001] The invention belongs to the technical field of semiconductor refrigeration, and in particular relates to a control method of a semiconductor temperature control box. Background technique [0002] Semiconductor refrigeration technology has the advantages of long service life, small size, no pollution, no noise, high reliability, easy high-precision constant temperature control, and small thermal inertia. It is an environmentally friendly emerging refrigeration method. There are semiconductor refrigeration products on the market, but they are mostly found in semiconductor refrigerators with a single function; the semiconductor temperature control box realizes two application functions of heating and cooling by controlling the working mode of the refrigeration sheet. [0003] Temperature control box products based on semiconductor refrigeration technology, the main application technology is the drive control of semiconductor refrigeration chips; among th...

AI Technical Summary

Problems solved by technology

Commonly used control circuits include H-bridge control circuits based on MOS tubes, transistors, and solid-state relays. However, due to the limitations of power supply polarity, current magnitude, and switching frequency, there are still complex drive circuits, high timing requirements for control signals, and Problems such as low working frequency and easy heat generation make the product cost of the temperature control box high, the control is not flexible enough, and the control accuracy is low

[0004] According to the working characteristics of semiconductor refrigeration chips, the flexible control of the working power can realize the smooth and continuous adjustment of the cooling capacity of the temperature control box to achieve the constant temperature control function; the current temperature control box products are mainly controlled by stages, and there is no adjustable constant temperature design Control function: There are mainly two ways to control the working power of the cooling plate: working current control and switching frequency control. Under a large working current, it will bring certain difficulties to the design of the control circuit. The switching frequency control needs to consider the switching damage of components. , to reduce system energy consumption and improve practical application capabilities

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