DEVICE MEASURING QUANTITY OF HEAT ENERGY TRANSFERRED BY HOT WATER SUPPLY Russian patent published in 2002 - IPC

FIELD: measurement technology. SUBSTANCE: device can be employed in instrumentation used in open heating and hot water supply systems. It enables heat energy consumed with hot water to be metered without use of network or battery power supply which secures functioning of instrumentation and resolve problems related to provision of electric safety when instrumentation is exploited in premises of increased humidity. Known heat quantity meter has counter, voltage source, flowmeter which outputs are connected to supply diagonal of bridge circuit with resistance thermometers in adjacent arms and which output diagonal is connected via amplifier to key, null detector connected with output to controlling input of key and with input to supply diagonal of bridge circuit through two resistors. Meter is added with coil having magnetic core, diode, capacitor, corrector, normalizer, multiplier, electric energy storage circuit, two threshold units, first AND gate, thermoelectric generator, communication unit and impeller rotating freely. Communication unit has NOT gate, second AND gate and OR gate. Ends of blades of impeller carry tips of magnetic conducting material. Case of flowmeter has hole in plane of rotation of tips where hollow plug is put. In its space there is placed coil with magnetic core, capacitor and diode. Finish of coil winding is connected to one lead of capacitor, anode of diode and chassis are connected to another lead. Cathode of diode is connected to start of coil winding and through corrector, normalizer, multiplier, electric energy storage circuit, first threshold unit and first AND gate to second input of second AND gate. Second input of multiplier is connected to output of thermoelectric generator through second threshold unit. Output of electric energy storage circuit is connected to second input of first AND gate, input of NOT gate is connected to output of voltage source, second input of OR gate is connected to output of key and output of OR gate is connected to input of counter. Hot ends of thermocouples, predominantly of semiconductor type, of thermoelectric generator are positioned in hot water flow and cold ends are placed in cold water flow. EFFECT: enhanced functional reliability of device. 1 dwg