CZ16777U1 - Circuit arrangement of heat-exchange apparatus with measurement of consumption of hot service water at object bases - Google Patents

Description

Connection of heat exchanger with measurement of hot water consumption on the heels of buildings

Technical field

The technical solution concerns the connection for the measurement of consumed domestic hot water on the heels of buildings supplied with centrally prepared domestic hot water.

BACKGROUND OF THE INVENTION

The currently used technical solutions are either very inaccurate and lead to large differences between the measured amount of hot utility water prepared at the heat exchanger stations by the supplier and the measured amount of hot utility water consumed by customers, this finding concerns the installation of residential water meters or and circulation of hot service water at the foot of the building, or the solutions used do not allow to adequately manage pressure fluctuations, whether in hot or cold water distributions in the building or maintenance of the used heat exchanger, usually a plate heat exchanger.

A variant solution is the connection of a central distribution of domestic hot water, based on the use of a heat exchanger, a connecting pipe equipped with a water meter and possibly supplemented by a circulation pump.

However, these connections do not solve the problem of the impossibility of measuring the pressure loss on the heat exchanger and the subsequent flushing respectively. cleaning. Also, the overpressure problem on the secondary side of the heat exchanger is not solved, whether it arises in the domestic hot water supplier, or when cold water is pushed through faulty mixer taps to the domestic hot water distribution, or pressure fluctuations due to domestic hot water temperature fluctuations. water.

The essence of the technical solution

The aforementioned drawbacks are largely eliminated by the connection of the heat exchanger with the measurement of the hot water consumption on the heels of the buildings formed by the heat exchanger, preferably by means of a plate inlet primary inlet through the inlet filter to the domestic hot water inlet. and at the same time the secondary heat exchanger inlet connected to the domestic hot water circulation via the circulation pump and the secondary heat exchanger outlet connected to the domestic hot water outlet, where the inlet hot water supply line is connected to the domestic hot water outlet line water connection pipe with a series inlet inlet shut-off valve, non-return valve and water meter according to this technical solution, which is based on the fact that the primary side of the heat exchanger and that the secondary side of the heat exchanger is provided with a secondary inlet drain valve and a secondary outlet drain valve, in front of which a safety valve is connected to the secondary outlet of the heat exchanger, whereby the connecting pipe is between the inlet shut-off valve. A pressure reducing valve is fitted in series with the non-return valve, and an outlet shut-off valve is connected in series to the connecting pipe between the water meter and the tap from the hot water outlet branch.

The drain valves on the primary and secondary sides of the heat exchanger solve the possibility of measuring the pressure loss on the heat exchanger and the subsequent flushing respectively. cleaning. The pressure reducing valve in the connection pipe 40 then solves the overpressure problem on the secondary side of the heat exchanger if it is generated in the domestic hot water supplier.

The second possible alternative is to connect the heat exchanger with the measurement of the hot water consumption on the heels of the objects formed by the heat exchanger, preferably with a plate, inlet primary inlet through the inlet filter to the inlet of the hot water. and, at the same time, through the secondary heat exchanger inlet through the circulation pump to the domestic hot water circulation inlet, and

The secondary heat exchanger outlet, connected to the domestic hot water outlet, is connected downstream of the inlet filter to the domestic hot water inlet branch with the domestic hot water outlet branch through a connecting line with a series inlet shut-off valve, check valve and water meter according to This technical solution is characterized in that the primary side of the heat exchanger is provided with a primary inlet discharge valve and a primary outlet discharge valve, and that the secondary side of the heat exchanger is provided with a secondary inlet discharge valve and a secondary outlet discharge valve in front of the secondary at the same time, an expansion vessel is inserted between the hot water circulation inlet and the circulation pump, with a water meter and taps connected to the connecting pipe. An outlet shut-off valve is installed as standard in the domestic hot water outlet.

In this alternative circuit, an expansion vessel inlet at the inlet of the domestic hot water circulation is used instead of the pressure reducing valve installed in the connecting pipe. It is able to handle pressure fluctuations depending on fluctuations in domestic hot water temperature.

A third alternative is to use an expansion vessel inlet at the domestic hot water circulation inlet according to the first alternative, i.e. with a pressure reducing valve in the interconnecting pipe.

This connection solves the overpressure problem on the secondary side of the heat exchanger if it occurs in the domestic hot water supplier and at the same time the pressure fluctuations depending on the domestic hot water temperature fluctuations are avoided.

The fourth alternative is any of the previous three connections, supplemented at the cold water inlet with an inlet reduction valve in series.

This connection is used when cold water is forced through faulty mixer taps into the domestic hot water system.

The technical solution used enables to determine sufficiently precisely the amount of hot service water consumed by the building, and to treat pressure fluctuations in hot and cold water distribution systems and last but not least, it enables sufficient maintenance of the used equipment and its diagnostics.

BRIEF DESCRIPTION OF THE DRAWINGS

The technical solution will be explained in more detail by means of the drawings, in which FIG. 1 shows a connection with a heat exchanger showing a primary inlet drain valve, a primary outlet drain valve, a secondary inlet drain valve, a secondary outlet drain valve, a safety valve. valve and outlet shut-off valve.

Giant. 2 illustrates a heat exchanger circuit designating a primary inlet drain valve, a primary outlet drain valve, a secondary inlet drain valve, a secondary outlet drain valve, a safety valve, and an expansion vessel embedded in the domestic hot water circulation inlet with an outlet conduit shut-off valve.

Giant. 3 shows a circuit arrangement according to FIG. 1 with an expansion vessel inserted in the inlet of the domestic hot water circuit.

Giant. 4 shows a modification of the circuit according to FIG. 1 with an inlet pressure reducing valve arranged at the cold water inlet of the object.

Abbreviations used in the pictures: SV - cold water, DHW - domestic hot water.

-2EN 16777 Ul

Examples

The circuit diagram, which is shown in FIG. 1, consists of a plate heat exchanger I, connected via the primary inlet via the inlet filter 2 to the domestic hot water inlet, and the primary heat exchanger as well as the domestic hot water circulation outlet. and at the same time by a secondary heat exchanger inlet connected via the circulation pump 3 to the domestic hot water circulation inlet and a secondary heat exchanger outlet connected to the domestic hot water outlet, whereby the inlet hot water supply line is connected to the hot water outlet line The primary side of the heat exchanger 1 is provided with a primary inlet drain valve 8 and a primary outlet drain valve 9, the secondary side of the heat exchanger. the heat exchanger 1 is provided with a secondary inlet discharge valve 10 and a secondary outlet discharge valve H, upstream of which a relief valve 12 is connected to the secondary outlet of the heat exchanger 1, and a reduction valve 5 is in series connected to the inlet pipe 4 valve 13 and at the same time between the water meter 7 and the branch from the domestic hot water outlet branch, an outlet shut-off valve 14 is connected in series to the connecting line.

The circuit according to the block diagram in FIG. 2 consists of a plate heat exchanger 1, connected via a primary inlet through the inlet filter 2 to the domestic hot water inlet and a primary heat exchanger and heat outlet, connected to the domestic hot water circulation outlet. of the heat exchanger 1 connected via the circulation pump 3 to the domestic hot water circulation inlet and the secondary exchanger outlet! The inlet of the domestic hot water inlet line is connected to the domestic hot water outlet line through connecting line 4 with a series-connected inlet shut-off valve 5, a non-return flap 6 and a water meter 7. 1, the secondary inlet of the heat exchanger 1 is provided with a secondary inlet drain valve 10 and a secondary outlet discharge valve H, in front of which a safety valve 12 is connected to the secondary outlet of the heat exchanger 1, an expansion vessel 15 is interposed between the inlet of the domestic hot water circulation and the circulation pump 3, with an outlet shut-off valve in series connected to the connecting pipe 4 between the water meter 7 and the branch of the domestic hot water outlet branch 14.

The circuit according to the block diagram of FIG. 3 is a modified circuit according to FIG. 1 such that an expansion vessel 15 is interposed between the inlet of the domestic hot water circulation and the circulation pump.

The circuit according to the block diagram of FIG. 4 is a modified circuit according to FIG. 1, so that an inlet reduction valve 16 is connected in series at the cold water inlet to the object.

Industrial applicability

The connection according to this technical solution is designed for four-pipe distribution in district heating systems, where it enables accurate, reliable and safe measurement of hot water consumption in individual buildings.

Claims (4)

PROTECTION REQUIREMENTS 1. Connection of a heat exchanger with the measurement of the hot water consumption on the heels of the buildings, consisting of a heat exchanger (1), preferably by means of a plate, connected primary inlet through the inlet filter (2) into the domestic hot water inlet and primary heat exchanger (1) -3GB 16777 U1 in the domestic hot water circulation outlet and the secondary heat exchanger inlet (1) connected through the circulation pump (3) into the domestic hot water circulation inlet and the secondary heat exchanger outlet (1) in the domestic hot water outlet , wherein the inlet of the domestic hot water supply line and the outlet line is connected downstream of the inlet filter (2) 5 domestic hot water via a connecting pipe (4) with an inlet inlet shut-off valve (5) in series, a non-return valve (6) and a water meter (7), characterized in that the primary side of the heat exchanger (1) has a primary inlet drain valve (8) and a primary outlet discharge valve (9), and that the secondary side of the heat exchanger (1) is provided with a secondary inlet discharge valve (10) and a secondary outlet discharge valve ίο (11) upstream of the secondary outlet of the heat exchanger (1). (12), wherein a pressure reducing valve (13) is connected in series between the inlet shut-off valve (5) and the non-return valve (6) into the connecting pipe (4) and is simultaneously connected to the connecting pipe between the water meter (7) and an outlet shut-off valve (14) is fitted as standard. 2. Connection of the heat exchanger with the measurement of the hot water consumption at the heels of the buildings, consisting of the heat exchanger (1), preferably by means of a plate, connected primary inlet through the inlet filter (2) into the domestic hot water inlet and primary heat exchanger outlet (1) connected to the domestic hot water circulation outlet and at the same time through the secondary heat exchanger inlet (I) via the circulation pump ( 3) a domestic hot water circulation inlet and a secondary heat exchanger outlet (1) integrated into the domestic hot water outlet; 20 an inlet filter (2) interconnects the inlet branch of the domestic hot water with the outlet branch of the domestic hot water via a connecting line (4) with a series inlet inlet shut-off valve (5), check valve (6) and water meter (7). that the primary side of the heat exchanger (1) is provided with a primary inlet discharge valve (8) and a primary outlet discharge valve (9), and that the secondary side of the heat exchanger (1) is provided with a secondary exhaust inlet discharge valve (10) and a secondary outlet discharge valve (II) ), in front of which a safety valve (12) is connected to the secondary outlet of the heat exchanger (1) and at the same time an expansion vessel (15) is inserted between the hot water circulation inlet and the circulation pump (3). an output shut-off arm is fitted as standard between the water meter (7) and the tap from the hot water outlet branch (14). Connection according to claim 1, characterized in that an expansion vessel (15) is inserted between the domestic hot water circulation inlet and the circulation pump (3). Connection according to claim 1 or 2 or 3, characterized in that an inlet pressure reducing valve (16) is connected in series at the cold water inlet to the object.