A detection method and monitoring system for heat exchange fluid flow

Abstract

The invention relates to a heat exchange fluid flowing detecting method and monitoring system, and belongs to the field of heat exchange. A plurality of temperatures of heat exchange fluid are collected, the collected temperatures are compared, whether the heat exchange fluid flows or not is judged, and a specific method for collecting the multiple temperatures comprises the step that in the flow direction of the heat exchange fluid, the multiple temperatures are sequentially connected, or the temperatures of the heat exchange fluid on the same position in the different times are collected; a temperature detecting device and a heat exchange control system build dry contact signal connection through a relay with a normally-closed contact, independently work and do not have the electric signal mutual influence, and therefore the work stability of the whole system is improved; when the pipeline hot fluid on the use side of a heat exchanger does not flow or the temperature of the pipeline hot fluid on the use side of the heat exchanger exceeds the temperature, the relay is triggered to be switched off, after a heat exchange control system receives a shutoff signal, work is stopped, and the heat exchange control system is protected.

Description

technical field [0001] The invention belongs to the field of heat exchange, and in particular relates to a detection method and a monitoring system for heat exchange fluid flow. Background technique [0002] In a central air-conditioning system or a heat pump system, heat exchange needs to be performed through a heat exchanger. After heat exchange in the heat exchanger, the fluid used for heat exchange is conducted to the room in use through pipes to achieve cooling or heating. [0003] A heat exchanger is a device that transfers heat between two fluids at different temperatures. The heat is transferred from a fluid with a higher temperature to a fluid with a lower temperature, so that the temperature of the fluid reaches the index specified in the process to meet the needs of the process conditions. . Shell-and-tube, sleeve-and-tube and plate-type heat exchangers include heat exchanger use-side pipelines and heat exchanger source-side pipelines arranged in heat exchanger u...

AI Technical Summary

Problems solved by technology

But its disadvantage is that it is easy to make detection errors when detecting the internal blockage of the heat exchanger, and in the low temperature environment in winter, the water sealed in the liquid column pressure gauge will be damaged due to freezing

[0007] Ultrasonic sensors that use the ultrasonic wave to meet the liquid interface will generate reflections and form reflections into echoes to detect fluid flow, but the cost of use is high and the space required for installation is relatively large.

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