FR2709536A1 - Device for producing hot water, in particular for heating rooms of dwellings - Google Patents

Abstract

Device for producing hot water, in particular for heating rooms, using energy-dissipation elements (16) through which the hot water thus produced flows, characterised in that it comprises a liquid circuit (10) including a pump (20) driven by a motor (22), a heating chamber (28) equipped with a centripetal coiled conduit, an injection tube connecting the delivery of the pump to the outer end of the centripetal coiled conduit, tangentially to the coil, a discharge tube perpendicular to the overall plane of the centripedal coiled conduit and connecting the inner end of the latter to the intake of the pump.

Description

The present invention relates to a device for producing hot water, in particular for heating residential premises.

Numerous devices for producing hot water of an economic nature are known, such as heat pumps or solar heating, but either the installations are complex and of a cost price too high, or the production of calories is too low. .

As for production devices using a boiler burning fossil fuel, the consumption is too great and, moreover, their functioning seriously affects the environment.

Also, the present invention provides a hot water heating device, in a closed circuit, which respects the environment, the cost price of which is low, which can be installed in any place equipped with a source of electrical energy, which is very compact, which is very reliable and which requires very little maintenance.

To this end, the device for producing hot water, according to the invention, in particular for heating premises using radiators in which said hot water thus produced circulates, is characterized in that it comprises a pump driven by a motor, a heating chamber equipped with a centripetal spiral duct, an injection pipe connecting the pump to the chamber with a tangential inlet in the centripetal spiral duct, an evacuation tube connected to the chamber, centered and perpendicular to the plane containing the centripetal spiral duct of the chamber.

This centripetal spiral duct comprises at least one winding turn on itself.

According to another characteristic of the invention, the spiral circuit of the device for producing hot water according to the invention has a machined outer face and an inner face with a polished surface state.

In addition, the device comprises a circuit for distributing the heated water to heat dissipating elements, a pipe collecting the water in return for the dissipating elements, a control valve and at least one thermostat connected to a central control unit.

This heating device also includes a primary circuit in which the heating chamber is mounted with its spiral circuit, this primary circuit itself being disposed within a water reserve tank, mounted on a secondary circuit.

The pressure delivered by the pump is between 4 and 20 bars.

The invention is described below according to a particular, nonlimiting embodiment, with reference to the appended drawings which represent - FIG. 1, a schematic view of a heating circuit implementing a heating chamber with a centripetal spiral duct according to the invention.

- Figure 2, a perspective view of a heating chamber with centripetal spiral duct, - Figure 3, a sectional view of the heating chamber with a centripetal spiral duct, and - Figure 4 a sectional view along line 4 -4 of Figure 3.

FIG. 1 shows a complete circuit of a heating installation comprising a primary circuit 10 and a secondary circuit 12.

The secondary circuit comprises, in known manner, a circulation pump 14, elements 16, energy dissipator, such as radiators, as well as a hot water storage tank 18.

The primary circuit comprises a pump 20 driven by a motor 22, itself controlled by a control unit 24 equipped with a thermocouple 25 immersed in the water of the hot water storage tank and a pipe 26 in closed loop on which a heating chamber 28 is interposed.

The pipe 26 in closed loop takes a serpentine shape at the outlet of the heating chamber and moreover it is arranged, for the most part, in the hot water storage tank 18.

FIG. 2 shows an embodiment of a heating chamber which comprises a centripetal spiral internal conduit 30, as shown in detail in FIG. 3.

The heating chamber comprises a body with the spiral duct 30 machined with a cover 31. In this example, the duct has a substantially rectangular section as shown in FIG. 4.

The radially inner surface 36 of the conduit 30 is in this particular embodiment of the polished type.

The outer surface 38 of this same conduit remains roughly machined, that is to say relatively rough.

The spiral makes at least one turn on itself.

The outer end of the conduit 30 is supplied by an injection pipe 32 which is oriented tangentially to the spiral.

The inner end of this same conduit opens out at the inlet of the evacuation pipe 34, which is oriented perpendicular to the plane containing the conduit 30.

Furthermore, the equivalent diameter of the inlet section of the conduit 30 is at least two times less than that of the discharge pipe and the passage section of this conduit gradually increases from its entry to its exit.

The device operates as described below.

The pump puts the liquid under pressure, between 4 and 20 bars and in domestic applications, this pressure will be of the order of 6 bars.

The liquid is circulated in the supply conduit 32 with a high speed and under pressure then passes through the pipe 34 in the coil 27 and returns to the pump 20, it is noted that the temperature of the circulating fluid rises, to reach values from 80 to 1000C very quickly.

It is understood that such a device is very advantageous for heating applications because, thanks to the thermocouple and to suitable control members of known type and not shown for the simplification of the drawing, the starting water of the secondary circuit can be mixed. with return water from this same circuit in order to deliver the number of calories required in the dissipating elements.

In addition, it can be seen that the installation requires, in addition to the installation of dissipating elements, common to any heating installation, a simple connection to the electrical network.

This energy is most suitable for supplying the most remote and difficult to access places and, the device being simple, it is of particular interest for cold regions that are not industrially developed.

The speed of heating is also a very interesting factor, if we compare to hot water accumulators with electric resistances.

Such a heating circuit comprising 200 liters of water, radiators of 3 liters per room, a heating chamber of 140 mm in diameter, working at 6 bars makes it possible to heat 60 rooms from 18 to 20 m2.

As for energy consumption, it is around 2.15 kWh for a room of 18 to 20 m2.

It is of course possible to provide direct heating of the dissipating elements by the primary circuit, by eliminating the secondary circuit.

Indeed, the flexibility of operation of such an installation makes it possible to adapt and control the temperature of the water at the outlet of the evacuation duct with great precision, if necessary.

In this case the thermocouple is connected to the primary circuit and it can advantageously be supplemented by thermostats arranged in the parts to be heated in order to regulate the temperature, although this arrangement makes losing the simplicity of the preferred embodiment of the device according to the invention.

The section of the conduits 30 and 32 can take any form, for example a parallelogram.

According to an alternative embodiment, braking members, for example ribs 35, can be arranged in the evacuation duct as shown so as to create additional friction forces, slowing down the speed of circulation of the fluid.

Claims (8)

 1. Device for producing hot water, in particular for heating premises using energy dissipating elements (16) in which the hot water thus produced circulates, characterized in that it comprises a liquid circuit (10 ) comprising a pump (20) driven by a motor (22), a heating chamber (28) equipped with a centripetal spiral duct (30), an injection pipe (32) connecting the discharge of the pump to the outer end of the centripetal spiral duct tangential to the spiral, a discharge pipe (34) perpendicular to the general plane of the centripetal spiral duct and connecting the inner end of the latter to the suction of the pump.  2. Device for producing hot water according to claim 1, characterized in that the equivalent diameters of the discharge pipe (34) and the spiral duct (30), in the center of this duct are at least equal to twice that of the injection pipe (32).  3. Device for producing hot water according to claim 1 or 2, characterized in that the discharge pipe (34) comprises braking members (35) such as ribs.  4. A device for producing hot water according to any one of the preceding claims, characterized in that the centripetal spiral duct (30) comprises at least one turn.  5. Device for producing hot water according to any one of the preceding claims, characterized in that the centripetal spiral duct (30) has an outer face (38) relatively rough and a radially inner face (38) in a surface state polished.  6. Heating device according to any one of the preceding claims, characterized in that it comprises a secondary circuit (12) for distributing water to elements (16) heat dissipators, in relation to heat exchanges with the liquid from the heating chamber (28).  7. Heating device according to claim 6, characterized in that the centripetal spiral duct (30) is interposed in a primary circuit (10) within a balloon (18) water reserve forming part of the secondary circuit (12 ).  8. Heating device according to any one of the preceding claims, characterized in that the pressure delivered by the pump is between 4 and 20 bars.