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A screw chiller control system

A chiller and control system technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as chip damage and poor power supply stability, and achieve the effects of enhancing stability, improving safety, and avoiding damage

Inactive Publication Date: 2016-09-14
SICHUAN APOCO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The screw chiller is controlled uniformly by the control device. There are many chips integrated in the control device. The operation of the chips requires external power supply. However, the power of the existing energy management device is directly provided to the internal chip after being transformed and shaped. Due to the interference of external signals or other factors, the stability of the power supply is poor, so as to cause damage to the internal chip of the intelligent building control device

Method used

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  • A screw chiller control system

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Effect test

Embodiment 1

[0018] Such as figure 1 The shown control system of a screw chiller includes a controller and a power supply part for supplying power to the controller. The power supply part includes an overcurrent protection circuit, a resistance-capacitance absorption circuit, a clamping circuit, a transformer TC and a rectifier connected in sequence. circuit, the clamping circuit is composed of a transient suppression diode TVS, the secondary side of the transformer TC is connected with a grounding capacitor C2, and the RC absorption circuit includes a resistor R4 and a capacitor C1 connected in series. The overcurrent protection circuit can be realized in various mature circuit forms.

Embodiment 2

[0020] Such as figure 1 The control system of a screw chiller shown in the present invention is refined on the basis of the above embodiments, that is, the overcurrent protection circuit includes a triode T1 and a triode T2, and the base of the triode T1 is connected to There is a voltage dividing circuit, the base of the triode T1 is connected to the voltage dividing circuit, the emitter of the triode T1 is connected to the emitter of the triode T2, and the collector of the triode T1 is connected to the base of the triode T2 And the resistor R3 is connected to the power supply input terminal and the collector of the triode T2 at the same time, the voltage divider circuit is connected to the power supply input terminal, and the emitter of the triode T2 is connected to the primary side of the transformer TC and the transient suppression diode at the same time The TVS is connected.

[0021] The voltage divider circuit includes a resistor R1 and a resistor R2 connected in series...

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PUM

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Abstract

The invention discloses a screw water chiller control system which comprises a controller and a power supply portion powering the controller. The power supply portion comprises an overcurrent protection circuit, a resistance-capacitance absorbed circuit, a clamping circuit, transformer TC and a rectifying circuit which are connected in sequence; the clamping circuit is composed of a transient voltage suppressor (TVS), a ground capacitor C2 is connected to the secondary side of the transformer TC, the resistance-capacitance absorbed circuit comprises a resistor R4 and a capacitor C1 which are connected in series with the overcurrent protection circuit connected on a power supply, generated spike pulse is absorbed and clamped by the resistance-capacitance absorbed circuit and the clamping circuit, following circuits are protected, and security is improved.

Description

technical field [0001] The invention relates to the field of screw chillers, and more specifically relates to a control system of a screw chiller. Background technique [0002] The screw chiller is called the screw chiller because its key component, the compressor, is screw-type. The state of the unit coming out of the evaporator is a gas refrigerant; after being adiabatically compressed by the compressor, it becomes a state of high temperature and high pressure. The compressed gas refrigerant is cooled and condensed by isobaric pressure in the condenser, and then becomes a liquid refrigerant after being condensed, and then expands to a low pressure through a throttle valve to become a gas-liquid mixture. Among them, the liquid refrigerant under low temperature and low pressure absorbs the heat of the cooled substance in the evaporator and becomes a gaseous refrigerant again. The gaseous refrigerant re-enters the compressor through the pipeline to start a new cycle. These ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B49/02
CPCF25B49/02F25B2600/024
Inventor 赖启天
Owner SICHUAN APOCO TECH