CZ16940U1 - Apparatus for measuring service water consumption - Google Patents

Description

Equipment for measuring domestic hot water consumption Technical field

The invention relates to a measurement of the flow of fluids in which fluid flows through a measuring device. BACKGROUND OF THE INVENTION

When supplying domestic hot water from a central source to multi-dwelling buildings, the individual dwellings are connected to a hot-water pipe, in which the hot water is still circulated, so that hot water complying with the standard is available at the supply point. The amount of hot water taken is measured by the housing water meters installed at each tap. The cost of hot water is calculated by calculating the sum of the costs of the amount of cold water taken and the cost of the heat supplied to heat it. From this measurement it is not possible to determine the actual costs of hot water and the costs of heat loss in distribution systems. In addition, domestic water meters are affected by the user to the detriment of the amount of hot water actually taken.

The essence of the technical solution

The essence of the technical solution consists in supplementing the measurements with house water meters with a differential flow meter with flow sensors mounted on the foot of the circulation loop in the house. The advantages of the solution are low energy consumption with minimal maintenance. The system is very stable and resistant to its mechanical impact.

The meters arranged in the proposed connection enable detection of local places of unauthorized hot water abstraction and increase the billing objectivity from the hot water supplier towards the customers.

Overview of the figure in the drawing

The attached figure schematically depicts one hot-water circuit with a differential flow meter in the circulation part of the distribution system.

Example of technical solution

At the inlet of the circulation loop 2, connected to the hot water pipe 1, a flow sensor 3 of the hot water supply is connected. Behind it, all hot water taps 5 with domestic water meters are connected in the circulation loop 2. Downstream of the draw-off points 5 is a thermostatic valve 4. A return flow sensor 6, a valve 7 and a check valve 8 are mounted downstream of the circulation loop 2. The output of the hot water flow sensor 3 and the return water flow sensor 6 are connected to the meter. 9 different flow rates.

The supply water flow sensor 3 indicates the amount of hot water flowing into the loop 2. The return water flow sensor 6 supplies information on the amount of hot water returning from the circulation loop 2 to the hot water pipe 1. The difference of their values indicated by the differential flow meter 9 domestic hot water. The thermostatic valve 4 throttles the circulation of water in the circuit if it is adequately warm after the last tap 5. The valve 7 is designed for hydraulic adjustment of the system. The non-return valve 8 prevents a change in the direction of water circulation in the pipeline. The device makes it possible to monitor the correct functioning of domestic water meters at sampling points 5 and to detect undesirable anomalies more easily.

Claims (1)

PROTECTION REQUIREMENTS 1. Equipment for measuring the consumption of domestic hot water supplied from a central source in a hot-water pipe with a supply and return branch to a circulation loop from which individual offtake points are connected, equipped with domestic water meters, in which a thermostatic throttle valve is installed; and a non-return valve and a non-return valve, characterized in that a supply flow sensor (3) is provided on the supply line of the circulation loop (2) between the hot water pipe (1) and the hot water tapping points (5). a return water flow sensor (6) is mounted downstream of the draw-off points (5) on the return loop of the circulation loop (2), the output of the hot water supply sensor (3) and the output of the return water sensor (6) connected to corresponding inputs of the differential flow meter (9).