FR2559574A1 - Domestic water pipework reheating device especially for inhabited premises - Google Patents

Abstract

Device for preventing the continuous circulation of domestic hot water. The invention relates to a device enabling domestic hot water to be maintained at the desired temperature in its pipe between two passages without continuous circulation of the said water. It is composed of a linear exchanger 1 in the form of pipework with 3 or more channels 2, of a communication device 3, of channels intended for a heat exchange fluid 4 and of a circulation pump 5. The device, according to the invention, is particularly intended to prevent furring or corrosion of circulation pumps of domestic hot water circuits of inhabited premises.

Description

-1-I The present invention relates to a device intended to maintain in

  temperature of a domestic hot water piping in any room of ha-

  bitation, so that the water is hot at all times during a drawing.

  To achieve this result, a circuit has traditionally been used.

  cantinal culation of hot water sanitairesthe heat generator and the tap. This solution requires the installation of two

  separate pipes (one way, one return) and a circulation pump

  tion (special domestic hot water).

  Such an installation has three major drawbacks:

  - a high cost at the time of creation.

  - a great difficulty, even the quesi- impossibility of the application

  quer in the case of improvement of an exsitante installation in buildings where the round trip circuit would not have been planned

during construction.

  - frequent destruction of the circulation pump, consecutive

  scaling or corrosion thereof.

  Indeed, domestic hot water is constantly renewed in

  the circuit for maintaining it at temperature and due to its consumption

  tion, we observe significant calcareous deposits in the case of

  re, or aggressiveness in the case of fresh water.

  It should also be remembered that this dau must remain potable

  at, therefore, cannot be treated by adding whole product

  limestone or corrosion inhibitor.

  The device according to the invention overcomes these three drawbacks. It consists, in effect, in circulating in a closed circuit along the domestic hot water piping in channels fitted for this purpose, a small amount of non-renewed heat transfer fluid such as central heating water or any other fluid hot, so

  make a linear heat exchanger and keep ai-si perma-

  domestic hot water at the desired temperature in its piping,

  even in case of prolonged shutdown of its consumption.

- 2-

  According to a preferred embodiment, the device for-

reit be constituted by:

  - a single piping comprising at least 3 channels.

  - a main channel of large section and resistant to pressure

  water supply, about 7 to 9 Atm., intended for the passa-

domestic hot water.

  - two secondary channels of small section and resistant to pressure-

  central heating, about 2 to -4 Atm., intended for

  flow back and forth of the csloporteur fluid

  Channels can be arranged in different ways and can

be 3, 5 or more.

  Figure I shows the entire device.

  Figures 2 and 3 show the section of an oblong piping-

three channel channel.

  Figure 4 shows the section of a circular piping to

three channels.

  Figure S shows the section of a circular pipe with five channels. Figure 6 shows the section of a pipe with three radial channels.

  The device consists of a linear gutter (I) represented

  both in the form of piping with three or more channels (2), half

  in communication (3), channels intended for the coolant (4) and a circulation pump, (special cantral heating), (5)

  The communication (3) of the channels intended for the heat transfer fluid

  taur is provided near the last draw-off tap of the installation

  tion. The connection of the channels intended for the heat transfer fluid on the

  central heating circuit is provided near the boiler.

  The circulation of heat transfer fluid can advantageously be as-

  sur4e by the central heating circulator (5). If the installation of

  central heating does not include a circulator (principle of ccnvec-

  natural, thermo-syphcn) or if the circulator is unusable for some reason, it is necessary to add a small

  circulation pump, (central heating circulator).

2559 5 7 4

  3- According to a variant, the linear exchanger can be provided by a

  two-channel piping of adequate shape and pinching the pipe-

  existing domestic hot water tearie.

  This piping could advantageously be made in matter of

  re flexible plastic and resistant to around 750.

  Figure 7 shows the section of an embodiment of the

  two-channel piping connected by a membrane which is fixed by clamp

  on the domestic hot water piping.

  This embodiment is particularly recommended when

  that it is a question of transforming an existing installation which does not give

not be satisfied.

  According to a second variant, the piping with two or three or more channels can be surrounded, on its outer surface, by a layer

  thermal insulation. A device would combine the advantages of prede-

different variants of economics.

  Figure (8) shows an embodiment of such piping.

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-4-

Claims (4)

  1) Device intended to keep the domestic hot water at the temperature   desired temperature in its piping between two draws without effect   kill a continuous circulation of it between the tap   wise and the heat generator, characterized in that it comprises a linear heat exchanger (1) supplied by the central heating water (4) or by any other circulating heat transfer fluid year closed circuit.   2) Device according to claim 1, characterized in that   the linear exchanger (1) is produced by a piping (2) comprising carry at least 3 channels.   3) Device for claims 1 and 2, characterized in that   that the piping comprising at least 3 channels is produced by the addition by pinching on a simple piping, of a   piping with at least 2 channels.   4) Device according to claims 2 and 3, characterized in that   that the piping (2) comprising at least 3 monobloc channels or   composites is provided with a thermal insulator adhering thereto.