FR2504243A1 - Waste heat recuperator for fireplace - has lyre-shaped heating tubes allowing free expansion and high heat exchange - Google Patents

Abstract

The recuperator is shaped for recovery of heat energy by the heat siphon and can be used either on its own or it can be coupled to an existing standard central heating system. It is bedded in the fireplace and provided with a mobile grill which favours the oxygenisation of the hearth and the evacuation of the consumed fuel. The recuperator has a single entry, a small circuit of recuperation capacity and the hydrostatic load obtained from temperature raising is carried out by a rapid injection of heat carrying fluid towards the heated surfaces.

Description

ATTRACTOR - DESCRIPTION
Technical indications. Recover and transport the calories lost from the combustion of the chimneys by the thermosiphon principle.

Prior Techniques. Incomparable, the models known in this field, either by air vents, or with backsplash,
Exposed. The invention consists, by its shape, its design, its dimensions in trapping the maximum number of calories from the fire from the fire until the fire is extinguished, in using these calories in a conventional central heating network by thermal gravitation process.

The classic surge while retaining its character, thus makes it possible to significantly reduce the contingent of heating energy in the bale the coupling of the two systems being automated by appropriate technical means endowed with safety devices.

Presentation of Drawings. The invention is presented, front view (fig 1) from above (fig 3) side (fig 4-5) is placed in the state as indicated.

Exhibited by Reference of Drawings.

1- Structure: of parrallélipédique form Itinvention is real ized by operations of folding and relieving of sheets, and shaping of a tubular bundle in steel of 3mm, or refractory stainless steel of 2mm5
2- Operation: The invention operates as a thermosyphon on the plinth radiators, accelerated by the arrangement of the tube bundle, acting as a thermal accelerator.

Industrial applications. Any chimney, without exception, can be equipped with the invention without modifying the overall aesthetic, either as main heating, but then limited to the period of fire, or in coupling with conventional heating on which it eliminates the expense of energy by automatic walking priority.

The invention was designed for the recovery of calories from the combustion of all heating materials used in conventional fireplaces of residential houses, it responds perfectly by its reliability and efficiency to requests for energy savings.

It is characterized by:
- Its shape, its dimensions, studied to allow it to be embedded in the space of all styles of fireplaces, where it is entirely dissimilar, without modifying its aesthetics.

 - The absence of Backsplash, factor of insecurity, vertical beam, with loss of calories by direct ascent in the conduit, and allowing this advantageous presentation.

 - A suitable tubular bundle playing the role of natural thermal accelerator, favoring the starting of the thermosiphon in the master pipes by very rapid heating of the water thanks to its special design and its reduced capacity.

 - The radiators, if any, are supplied with power via a bypass accelerator on the return line, ensuring total safety in thermosiphon in the event of breakdown in the electrical sector.

 - Possible coupling on an existing central heating, then the expansion tank must be kept, but judiciously positioned at the height displayed by the pressure gauge of the installation in place, the isolation of one or the other generator being realized by means of ball valves.

 - In the case of simultaneous operation of the two energy sources on the same heating circuit, priority will automatically revert to the invention by an electro-thermostatic relay causing the instantaneous shutdown of the oil boiler.

 - A hinged cover, provided at its rear with a special device for evacuating residual fumes in the duct, and making it possible to use the invention in a kitchen hearth or in a grill

Claims (6)

CLAIMS 1 - Space recuperator characterized in that it comprises a tubular bundle in curved lyre of design and dimensions studied for the most efficient recovery and distribution of calories by Thormosiphon system, either in individual operation or coupled with a heating existing classic central. 2 - Recuperator according to claim (l) characterized in that it is noyX in the space, dotF of a mobile grid promoting the oxygenation of the hearth and the evacuation of the embers consumed. 3 - Claims salon recuperator (1 st 2) characterized by its beam ensuring free expansion with maximum exchange in the heating core. 4 - Salon recuperator claims (1 and J) characterized by a single start, given the low capacity of the recovery circuit, the hydrometric charge obtained by the rise in temperature is reflected in a rapid injection of the fluid carrying calories to the heating surfaces. 5 - Recuperator according to claim (2) characterized by the absence of backsplash and vertical beam, factors of insecurity and causing significant. loss of calories. 6 - Recuperator according to claims (1-2 and J) characterized by an inferior distribution, with By-ass accelerator on the return circuit, creating in a separate circuit rapid heating of the return water, avoiding pressure losses of pipes in the event of an unexpected shutdown of the conventional heating pump. T - Recuperator according to claims (1-3-4 and 6) characterized by the compulsory positioning of the existing expansion tank, on which a siphoning system with vent will be fitted, thus dispensing with regulating bell and safety valves, sources of hazards and insecurity. 8 - Recuperator according to claim (1) characterized by a decorated, aesthetic counter-heart plate, and playing the role of reflector in the open position, practical for cooking and grill in the closed position, and then playing the role of calorie accumulator.