A constant temperature metal bath

A technology of constant temperature metal and temperature sensor, applied in the field of analytical instruments, can solve the problems of large temperature overshoot, low temperature control accuracy, low temperature stability, etc.

Active Publication Date: 2018-03-20
北京东航科仪仪器有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a constant temperature metal bath with a Buck circuit and a full-bridge inverter circuit connected in series as the main circuit mode. Problems such as large temperature overshoot, low temperature stability, and low temperature control accuracy caused by large voltage ripple

Method used

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specific Embodiment approach

[0032] A kind of thermostatic metal bath of the present invention, its specific embodiment is:

[0033] A kind of constant temperature metal bath of the present invention, see figure 1 As shown, it includes: DC12V power adapter 1, main circuit 2, semiconductor cooling sheet 3, temperature sensor 4, fan 5, control circuit 6, heat sink 7, and heat conduction platform 8. The semiconductor cooling chip 3 forms a circuit with the AC220V AC power supply through the main circuit 2 and the DC12V power adapter 1, and the two surfaces of the semiconductor cooling chip 3 are in close contact with the heat conducting platform 8 and the heat sink 7 with good thermal conductivity through the thermal conductive silicone grease. ; The power switch tubes T1, T2, T3, T4, T5 of the main circuit 2 are connected to the control circuit 6 through wires; the temperature sensor 4 is tightly attached to the heat conduction platform 8 through heat-conducting silicone grease and connected to the control ...

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Abstract

The invention provides a constant temperature metal bathing device which comprises a DC 12V power supply adapter, a main circuit, a semiconductor refrigeration sheet, a control circuit, a temperature sensor, a heat radiating sheet, a fan and a heat guiding platform. The semiconductor refrigeration sheet, through the main circuit and the power supply adapter, forms a loop circuit with the current power supply; and the two surfaces are closely attached with the heat guiding platform and the heat radiating sheet respectively through heat conduction silicone grease. The power switch tube inside the main circuit is connected with the control circuit through conductive wires. The temperature sensor is closely attached to the lower surface of the heat guiding platform through the heat conduction silicone grease and is connected with the control circuit through the conductive wires. The fan is powered at a volt of DV 12V and faces right the wind channel of the heat radiating fin to provide cooling air. According to the invention, a cascade connection type main circuit topology is chosen featuring Buck circuit and full bridge inverter. Through the adjustment of the Buck, the outputted pulse width is changed so as to realize the precise adjustment of the outputted power. Through the full bridge inverter, the direction change is realized of the current; the cooling and heating of the semiconductor is controlled so as to realize the precise control over the entire working process.

Description

technical field [0001] The invention provides a constant temperature metal bath device with uniform temperature and precise temperature control, which belongs to the field of analytical instruments. Background technique [0002] Petroleum, biology, and chemical industries need to meet certain temperature conditions when analyzing and testing related samples. Therefore, it is necessary to perform heating, cooling, and heat preservation through a constant temperature control system to keep the samples in a constant temperature environment. As a temperature-controlled instrument for the preservation and reaction of biochemical reagents, the constant temperature metal bath is widely used in the preservation of various biochemical samples, the preservation and reaction of various enzymes, the polymerase chain reaction, the pre-denaturation of electrophoresis, and the coagulation of serum And accounting and protein denaturation treatment. [0003] The current constant temperature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D23/20
CPCG05D23/20
Inventor 胡国栋
Owner 北京东航科仪仪器有限公司
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