FR2541757A1 - Heat recuperator for open fireplaces - Google Patents

Abstract

The invention relates to heat recuperators using water in open fireplaces. The device is situated directly above the hearth. It comprises a cast-iron cooking pot 1 covered by an unattached lid 2. When filled with water, it forms the static heat recuperator. A coiled copper pipe wound into a helix 3 is placed inside the cooking pot. This circuit forms the dynamic heat recuperator and belongs to the heating network of the room. The cooking pot is supported by a steel monobloc stand whose feet act as fire-dogs and whose upper section forms a chimney-hook since it allows the cooking pot to be suspended at different heights 4. The device is intended for those with open fireplaces who wish to increase the efficiency thereof. Whether in association or alone, it forms a method for heating rooms using water. In combination with solar collectors or alone, it can also form the primary circuit of a water- heater.

Description

 The present invention relates to a water device intended to increase the thermal efficiency of an open fire chimney thanks to heat recovery. This device is used to heat, alone or in combination with other sources of cholera, a conventional water heating network.

 Currently known devices recover the heat most often below or on the rear and side sides of the fireplace. There are also other systems that have their recuperator in the chimney.

 Such devices have not posed an optimum performance for want of not being located above the hearth, given the aesthetics to be observed. In addition, to make many of them adaptable, expensive work is required in the fireplace.

 The heat recuperator according to the invention is located just above the hearth and does not require any adaptation work since it is posed like a pair of andirons. The heat recovery unit is integrated into a pot whose origin merges with that of the chimney.

The aesthetics of the chimney is thus preserved while improving its thermal efficiency.

 The pot made of cast iron full of water, closed with a lid only placed, constitutes the static recovery of colors. Inside the pot is arranged a coil of copper tube wound in spirals which constitutes the dynamic recovery of calories and whose the circuit belongs to the conventional water heater network. The pot is supported by a monobloc assembly acting as andirons at its base and cremoillery at its upper part, since the attachment to any one of the links in the chain makes it possible to locate the pot at different levels above fireplace.

 Figures 1 and 2 show a device according to the invention.

The pot (i) with a capacity of about 15 liters is closed by a cover (2) only placed. Inside the pot is arranged the coil of copper tube (3) wound in spirals and marries without touching it, the inner periphery of the pot. The connections, inlet and outlet of the coil with the offset tube and the inlet tube of the heating network, are carried out thanks to the two cast iron nipples (5) and (6), respectively inlet and outlet, and are welded on the outside
of the pot. They are threaded moles at their ends and can thus receive the nuts on flanged collar of the interior and exterior circuits.

Figure 3 is a detail of this assembly.

The support of the pot above the hearth is ensured by a monobloc assembly in square iron (4) whose bose acts as two andirons
On the upper part is hung a chain (8) which supports the mormite thanks to the connecting piece (9) made of round iron.

 The device which is the subject of the invention can be used in all individual houses having an open fire. It does not require any adaptation work and can be combined with any other water chouffoge system as well as with known heat recuperators.

It can also constitute alone or in association with solar collectors the primary circuit of a solar water heater.

Claims (4)

 1. Water device used to recover heat from an open fire. It is characterized in that it comprises a cast iron pot (1) filled with water and surmounted by a cover (2). Inside the pot is arranged a coil of copper tube in circular spirals (3). This coil belongs to the dynamic heating circuit and plays the role of heat exchanger with the static circuit of the pot. The pot is supported by a rigid monobloc steel assembly (4).  2. Device according to claim 1 characterized in that the junction of the external heating circuit with the internal circuit consisting of the coil is provided by two molten cast iron nipples at their ends (5) and (6).  3. Device according to claim 1 coroctérisé in that the monobloc support at its base, por por its form, act as andirons.  4. Device according to claim 1 and 3 characterized in that the monobloc support allows at its upper part the attachment of the pot to different levels thanks to the channe (8).