CS202803B1 - Device for measuring and recording the withdrawn heat of singlepipe systems - Google Patents

Description

DESCRIPTION OF THE INVENTION OF THE CZECHOSLOVAK SOCIALISTIC CERTIFICATE

REPUBLIC (19) 202803 (11) (B1)

OFFICE

DISCUSSIONS (51) Int. Cl.3 G 01 K 17/08 (22) Registered 29 11 76 (21) (PV 7679-76) (40) Published 30 05 80 (45) Published 15 03 82 (75)

Author of the Invention GALAŠ JIŘÍ ing. and LABOUTKA KAREL doc. ing. CSc., PRAGUE (54) Equipment for measurement and recording of heat removal n single pipe systems

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for measuring and recording the heat collected in individual flat units heated by central heating of the water of a single pipe system. In conventional calorimetric measurements, it is usually necessary to measure the amount of water, the difference in water temperature before and after leaving the housing, to produce the product of both quantities and integration in time. The need for continuous measurement of the flow of hot water and the requirement of its product with the difference in temperature requires the use of turbine flowmeters with selective evaluation circuits. In implementing this method, the apparatus is too expensive to make it economically unacceptable to introduce a measurement of the heat removed in the individual housing units. For two-pipe vertical systems that are predominantly used, measurement is very difficult to implement. There are known apparatuses for measuring the heat removal in individual housing units based on the measurement of the heat quantity by means of a thermocouple battery placed in the individual central heating bodies when the integration is carried out by means of a mercury electrolytic counter. However, this very simple and cost-effective way of measuring the heat dissipated is sensitive to factors that may deliberately or intentionally interfere. Despite the use of protective circuits built into the device to limit these influences, the measurement is even uncertain when calculating the heat consumption per dwelling proportionally. A considerable defect of these devices is the demanding organization of reading the consumption of heat of individual apartments, where the heating plant employee must have access to all radiators at the time of reading and must release the securing of the front panel of the meter and empty the mercury pillar while the additional It is not possible to check the lawfulness of the reading in case of complaint. The aforementioned drawbacks are eliminated by a single-pipe system for measuring and recording heat removal, consisting of an inlet and outlet temperature sensor located in the inlet and outlet passageways. The inlet and outlet passages are placed in the inlet and outlet ducts. The inlet and outlet temperature sensors are connected to a measuring circuit formed by a bridge which is connected by a voltage-frequency converter to the frequency divider. The output of the measuring circuit is coupled to a retention device, for example an electromechanical pulse counter.

By using the control valves on the heating elements, which guarantee a constant hydraulic outlet when the water is flowing through the body or bypass, virtually constant water flow per unit of time is measured in a single-pipe system. 202803

Claims (2)

The device according to the invention only measures the difference in temperature at the inlet and outlet of the heating circuit, which is integrated according to time. The temperature difference measurement is carried out by means of thermometer resistors in the bridge circuit or thermocouple, whereby the voltage obtained by the voltage-frequency converter changes to a given number of electric pulses which are either directly or via a frequency divider fed to a registration device for recording of electrical pulses. The device according to the invention permits the use of long-distance registration or placement of registration devices in a common place for groups of residential units, which means organizational simplification of the consumption of heat consumed and the tenant's absence, or labor savings. The recording is permanent and backward controllable. The location of the inlet and outlet pipes itself virtually eliminates unwanted manipulation in order to influence the accuracy of the heat removal measurements. The device is placed in sealed cabinets with a sight glass to read the counter. Example of a particular arrangement of the heat removal and measurement equipment in a single pipe - SUBSTANCE Devices for measuring and recording the heat taken from a single pipe system, wherein inlet and outlet pipes are placed in the inlet and outlet pipes (4,5). a through tube (18, 19) that includes an inlet and an outlet temperature sensor (6, 7) that are connected to the measurement systems of the present invention is shown in FIG. see Fig. 1, with the flow 2 and the control valves 3 being connected in succession to the inlet pipe 4 and the outlet pipe S of the heating water. The inlet sensor 6 and the water temperature sensor 7 are coupled to the measuring circuit 8 for integrating the difference of the inlet and outlet temperature ducts according to time. The result is recorded by the registration device 9. When the inlet and outlet tubes are placed in close proximity, a measuring device and a heat removal record can be specifically arranged in the one-pipe systems as shown in FIG. 2. Inlet sensor 6 on inlet tube 18, outlet sensor 7 on outlet tube 19, measuring circuit 8 formed, for example, by bridge 10, voltage-frequency converter 11, frequency divider 12, and electromechanical pulse counter registered by the device 9, are in the common housing 17 connected by the right and left inlet flanges 13, 14 to the inlet pipe 4a by the right and left beverage outlet flanges 18, 18 not to the outlet pipe 5 of the CONNECTED CIRCUIT (8) formed by the bridge ( 10), which is connected via a voltage-frequency converter (11) to a frequency divider (12), the output of the measuring circuit (8) being connected to a registration device (9), for example an electromechanical pulse counter. 2 drawings