Ultra-low temperature freezing cabinet temperature controlling device

Abstract

This invention discloses a kind of temperature controlling device of super-low temperature refrigerator. The pressure sensor collects varieties of pressure signals of super-low temperature refrigerator system and connects to main controlling board interface through heat resistance module and data conductive wire. After centralized processing all the signals, the main controlling board controls high temperature compressor and low temperature through relay. The liquid crystal operating screen connects to R232 interface on the main controlling board through data line 232 cable. The signal- sending end connects to the relay and alarm. The main controlling board PLC communicating interface connects to local computer or network. The temperature in the box is automatically controlled. The temperature in the box, the temperature of absorbed air and the environmental temperature can be automatically displayed. This invention can also alarm under super high temperature and super low temperature. It also alarm when refrigerating system has troubles or power turns off. This invention can use printer to print. The computer can be used to remote control many medical super-low temperature refrigerator through data bus or internet.

Description

Technical field: [0001] The invention relates to a control device, in particular to a temperature control device for an ultra-low temperature freezer. Background technique: [0002] As we all know, most of the medical ultra-low temperature freezers store biologically active substances for medical treatment and scientific research, such as vaccines, plasma, biological reagents, etc. Once the freezer breaks down, the biologically active substances will deteriorate or fail, causing human life safety. and test data errors and other major irreparable losses, the existing ultra-low temperature freezer temperature control device has a mechanical temperature control type, electrical analog temperature control type, its shortcoming is that its temperature control device can only perform a single ultra-low temperature freezer On-site control, but not the control of multiple ultra-low temperature freezers, especially the remote control of ultra-low temperature freezers. Some temperatu...

AI Technical Summary

Problems solved by technology

[0002] As we all know, most of the medical ultra-low temperature freezers store biologically active substances for medical treatment and scientific research, such as vaccines, plasma, biological reagents, etc. Once the freezer breaks down, the biologically active substances will deteriorate or fail, causing human life safety. and test data errors and other major irreparable losses, the existing ultra-low temperature freezer temperature control device has a mechanical temperature control type, electrical analog temperature control type, its shortcoming is that its temperature control device can only perform a single ultra-low temperature freezer On-site control, but not the control of multiple ultra-low temperature freezers, especially the remote control of ultra-low temperature freezers. Some temperature control devices have poor reliability

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