Heating system temperature differential measuring apparatus

Abstract

The invention relates to a temperature difference measuring device of heating systems pertaining to the technical field of a temperature measuring device. The invention is mainly characterized by composing of a double end thermocouple and a signal conditioning circuit, the two connecting poles of the double end thermocouple are sealed together, assuring insulation and the same temperature; when in operation, both testing ends of the double end thermocouple adopt sealing fixing pedestal are respectively inserted into the inlet and outlet port of a customer heating pipe, both connecting ends are arranged close and are respectively wrapped insulated in thermal insulation material, temperature is assured the same at both the ends, after the double end thermocouple induces the temperature difference at the inlet and the outlet ports, a tiny voltage difference is generated at both ends of the thermocouple, the signal is amplified and displayed by a temperature difference amplifying circuit, the signal multiplies with the flow data acquired by a flowmeter sensor, the double end thermocouple is made of economic and universal thermocouple material copper constantan, the cost is low, the cost is only 1 / 5 of Pt1000 pairing thermocouple. The invention can also be applied to temperature difference measuring of adjacent fields.

Description

technical field [0001] The invention relates to a temperature difference measuring instrument for a heating system, which belongs to the technical field of temperature measuring instruments. Background technique [0002] Thermocouple temperature measurement is based on the thermoelectric effect - Seebeck effect, any two different metals or semiconductor materials, after welding at one end, as long as there is a temperature difference between the two ends, a thermoelectric potential related to the temperature difference will be generated in the circuit, but the thermoelectric potential signal Very weak, about 0.02-0.06mV / ℃, so a sensitive amplifier circuit is needed to meet the display conversion requirements. Therefore, for occasions where the temperature range is not large, thermal resistance is usually used for temperature measurement. The most commonly used in industry are 50Ω copper resistance Cu50 and 100 or 1000Ω platinum resistance Pt100 / Pt1000. At present, most devel...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a temperature difference measuring instrument for heating systems, aiming at the inconvenient installation of copper resistors and platinum resistors in household pipes, the scattered thermoelectric properties of membrane materials and aging phenomena, etc., which is beneficial to the use of household heating system pipes

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