Passive heat metering device and heat metering system working by passive heat metering devices

Abstract

The invention aims to provide a passive heat metering device and a heat metering system working by the passive heat metering devices. The heat metering device comprises a temperature difference power supply system, a reflection type ultrasonic flowmeter, a temperature sensor, a communication interface, a ZigBee controller and a liquid crystal display (LCD). By using characteristics of a concentrative heating and cooling system, the passive heat metering device automatically supply power through the temperature difference power supply system; a power supply is not required to be regularly replaced, so that the passive heat metering device is energy-saving and environment-friendly; the heat metering system works by two same passive heat metering devices provided by the invention; the two devices run in a low-power mode; the working modes of a main node and a slave node are regularly changed; under the conditions of heating and cooling, the system selects different metering programs to match different power supply capacities of a power supply system; and the passive heat metering device can be simultaneously suitable for heat metering of the heating and cooling system.

Description

[0001] Involved areas [0002] The invention relates to a passive calorie metering device and a passive calorie metering system utilizing the same, which are applied in the field of calorie metering. Background technique [0003] With the improvement of living standards, building industry and management level, heating in winter in the north of the Yellow River, heating in winter and cooling in summer in the central region, and cooling in the south have all begun to adopt centralized supply methods, and heat energy has also begun to be like water, Electricity and gas have become daily consumer goods and are used. The principle of thermal energy metering is to calculate the heat or cooling capacity supplied by the system to users by measuring the flow rate of user pipelines and the temperature difference between supply and return water. At present, the temperature sensor of the usual thermal energy metering device uses platinum thermal resistance, and the flow metering mainly ad...

AI Technical Summary

Problems solved by technology

At present, the temperature sensor of the usual thermal energy metering device uses platinum thermal resistance, and the flow metering mainly adopts the turbine structure, which has the problems of large pressure loss and low measurement accuracy.

The main structure adopts a single-channel type, and generally only measures the return water flow, and cannot realize the detection of the inflow and return water flow, so it cannot prevent users from maliciously using hot water and modifying behaviors

The same system cannot realize the conversion of heat and cold metering

The use of batteries for power supply has problems such as regular replacement and large maintenance

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