FR2573519A1 - DEVICE FOR PRODUCING HOT WATER - Google Patents

Abstract

THE PRESENT INVENTION CONCERNS A HOT WATER PRODUCTION DEVICE OF THE TYPE INCLUDING A HOLLOW BODY TANK WITH PIPE CONNECTION TUBING, AND A HEATING BODY. ACCORDING TO THE INVENTION, THE HOLLOW BODY 1 IS MADE AT LEAST PART OF A MATERIAL IN PARTICULAR METALLIC SUITABLE TO BE MOLDED, PREFERABLY IN SHELL OR UNDER PRESSURE WITH ITS WALL CROSSINGS AND POSSIBLY REMAINS RAW IN THE FINISHED STATE. THE INVENTION FOUND IN PARTICULAR APPLICATION IN HOUSEHOLD TYPE PRODUCTION APPARATUS FOR DOMESTIC USE FOR THE SUPPLY OF DOMESTIC HOT WATER.

Description

The present invention generally relates to production apparatus

  of hot water and essentially relates to a device for producing hot water, particularly of the household type for domestic use, such as water heater, dispenser or bath heater for the supply of hot water.

sanitary hot water.

  In hot water production apparatus, already known, there are so-called heating balloon devices, for example closed under pressure with or without accumulation, comprising either an insulated tank, or a tank with little or no heat insulation and a body of heating in which a particular chemical or electrical energy

  is converted into heat transmitted to the liquid to be heated.

  The tank, usually in the form of a cylindrical-spherical shell, is generally made of steel and comprises a cylindrical shell made of rolled sheet, joined welded, and assembled by welding by its ends respectively to two curved bottom ends of stamped or pushed sheet metal to which

  are welded piping connections.

  On the other hand, in particularly electric water heaters,

  the heat generator or heating element is generally

  consists of electrical resistances forming either an immersion heater, ie immersed in the water of the tank so as to be in permanent direct physical contact therewith, or barrel element mounted in a thermoconductive sheath reported, making protruding inside the tank. Moreover, thermal control instruments such as thermometers, thermometers or the like also dive either directly into the water through their thermosensitive portion forming a probe, or into a thermoconductive sheath reported

  protruding inside the tank.

  However, such known hot water production devices have various disadvantages. First, the

  Tank manufacturing is relatively slow and expensive.

  In addition, there is a risk of corrosion of welds

  particular because of the defects of homogeneity.

  On the other hand, the presence of roughness on the inner wall surface causes a risk of snagging and

  retention of mineral and organic particles from

water.

  Moreover, between the metallic parts of different nature present in the tank occur

  harmful phenomena of electrolytic corrosion.

  Finally, there is a risk of acid corrosion or clogging by scaling of the heating element causing

a danger of breaking it.

  The present invention aims to eliminate the inconveniences

  above mentioned by providing a production device

  simple hot water construction and structure, quick and economical manufacturing and maintenance

reduced and easy.

  The solution proposed by the present invention

  is a hot water production device of the type

  comprising a hollow-body container comprising tubular

  Pipe joint and a heating body, characterized in that said hollow body is at least partially made of a particularly metallic material which can be molded, preferably in shell or under

  pressure with its wall penetrations and possibly remain

raw in the finished state.

  Thus, the manufacture of such a hollow body is

  It is relatively easy and less expensive than in the case of known tanks because it does not require any additional work of forming, welding or forming wall penetrations and possibly machining. In addition, the absence of welding eliminates the correlative risk

corrosion.

  Advantageously, the material capable of being molded accurately

  has good thermally conductive properties, and

  is preferably succeptible to be superficial oxidized

  during molding to form a protective skin

  trice. Such a material is for example an alloy

foundry aluminum.

  According to another characteristic of the invention the heating body is constituted by a block made of a heat-conducting material preferably similar or identical to that of the aforementioned hollow body in which the heating element such as electrical resistance is embedded.

  and which is attached removably and fixed in thermal contact

  direct conductor to the outer wall of said hollow body.

  According to yet another characteristic of the invention, the heating element is preferably housed removably in a blind cavity of the tank wall making

  protruding inward from it.

  Thus, thanks to the good thermal conductivity of the tank material, the water is indirectly heated by conduction and / or convection through the wall of the tank and the fact that the heating element is completely isolated or separated from any physical contact. direct with water, allows the suppression of corrosion and clogging phenomena, therefore any risk of

failure for these causes.

  According to yet another characteristic of the invention, the heating element is molded into the mass of the reservoir, either concentrically at a local location, or

  distributed at several points in the tank wall.

  In this way, it is possible to restart the heating in particular steps.

  useful when you need to use a

  fraction only of the water capacity of the tank.

  According to another particularly advantageous feature of the invention, in each aforementioned wall penetration is mounted for example removably a tubular made of a dielectric material and which is fixed to said wall penetration by elements of dielectric material. This avoids any risk of electrolytic corrosion between the various parties present

in the tank.

  The invention will be better understood and other purposes, features and advantages thereof will become apparent

  more clearly on reading the explanatory description

  which follow, made with reference to the accompanying schematic drawings given by way of non-limiting example illustrating several currently preferred embodiments of the invention and in which: - Figure 1 is a cross-sectional view of a first embodiment of embodiment of the hot water production device according to the invention; Figure 2 is a view similar to Figure 1 of a second embodiment of the present invention;

  FIG. 3 is a partial view in cross section;

  Versale of an alternative embodiment of the first embodiment, showing a fixation of the heater body to the reservoir; FIG. 3B is a view from above of FIG. 3A; FIG. 4 is a view similar to FIG. 3A of another alternative embodiment of the first embodiment; - Figures 5A - 5C are partial cross-sectional views of various alternative embodiments of a third

  embodiment of the invention.

  With reference to the appended figures, the device for producing hot water according to the present invention comprises a hollow body container 1 and a body of

heater 7.

  The reservoir is a hollow body of any suitable shape, especially of revolution, entirely molded with its tubings or wall penetrations 4, 4 'for connecting the pipes. In the presently preferred embodiment, the reservoir is made of an aluminum alloy, especially a foundry alloy, for example silicon-magnesium alloy, such as that whose standardized conventional chemical designation is represented by the symbol

AS1OG.

  Tank 1 can be of any capacity

  varying for example between 1 and 300 liters.

  Moreover, the tank 1 is molded either in two parts 2, 3 to be subsequently assembled in a sealed manner, or in one piece, if possible, and it may remain rough cast, because of

  the excellent uniform or smooth surface state thus obtained.

  The two parts 2, 3 respectively constitute two equal or unequal tank fractions and each of them is, in the example represented, bordered, at the level of

  of the joining or separation plane, by an annular flange

  13 radially protruding outwardly. In this case, the assembly of the parts 2 and 3 is carried out either by bolting or by a quick fixing device on flanges with possible interposition of a seal gasket, or by welding the two flanges. It is also possible to envisage an assembly by crimping or by tight screwing of an externally threaded portion or part of the reservoir in the other fraction or part

internally threaded.

  The tank 1 ispouxvuved with at least two wall penetrations 4 'and 4 comings of material, respectively cold water inlet 14' and hot water outlet 14, preferably made in its curved bottoms. Each wall penetration 4, 4 'is intended to receive, mounted removably, a tubing 5, 5' made preferably of a material

  synthetic such as in particular polyvinyl chloride.

  The tubings 5, 5 'are advantageously attached to the

  poured wall 4, 4 'by means of elements 6, 6' such as bolts, nuts, screws or similar fasteners,

  preferably made of the same dielectric material.

  The heating body 7 is advantageously independent of the reservoir and removably attached thereto. This arrangement allows, contrary to known devices, an interchangeability of the heating body, facilitating the

  repair or replacement thereof.

  In a first embodiment (Figure 1), the heating body 7 is constituted by a metal block 8, aluminum alloy in the example shown. However, in general, this block can be made of any suitable material, preferably with properties similar to those of the hollow body material 1, that is to say

  possessing good thermo-conductive properties.

  A heating element, such as an electrical resistor, is embedded in the block 8 which is removably attached to the particularly external wall surface of the tank,

  direct thermo-conductive contact with it.

  Such a fixing of the heating body on the reservoir is carried out for example by central clamping

  in particular by nut on screw inserted into the body 7.

  FIGS. 3A and 3B show an alternative embodiment of the fixing of the heating body 7, which uses the cold water inlet 14 '. This arrangement allows the use of two parts 2 and 3 strictly identical, o further improved manufacturing of the tank. In addition, the heating body 7 is shaped so that it can be disassembled without dismantling the pipework. For this, as shown in Figure 3B, a unilateral recess 21 allows the release of the heater, after removing the nut 22 by

  normal slip in the pipe 5 '.

  In an alternative embodiment shown in FIG. 4 of the drawings, the heating element 7 is adjusted in a

  orifice in the wall of the tank 1, and in particular obtained

  during molding. The heating body 7 then constitutes

  part of the inner wall of the body of the tank 1.

  A stirrup 24 bearing on the tank is tight against it by means of a nut 23 which by screwing on a threaded rod 25 integral with the heating body 7, allows a displacement of the latter in the opposite direction of the displacement of the stirrup 24, thereby fixing the heating element 7 to the

  tank wall at a predetermined location. advantageous

  advantageously, the orifice formed in the tank wall is of conical shape flaring towards the inside of the tank, so as to cooperate sealingly with the heating body 7 shaped to form a tight complementary part

said orifice.

  In another variant embodiment, the heating body 7 is constituted by an enclosure or a closed enclosure 15 filled with a coolant such as water, at least partially surrounding the reservoir and in thermo-conductive contact with that (see Figure 1). This liquid, isolated from the sanitary water, is heated by an external heat source and transmits its thermal heat

to the tank.

  On the other hand, the instruments of measurement and

  such as thermometers, thermostats, etc. are mounted externally on the tank and, like

  heating elements, do not penetrate into the volume of

  water from it, measurement, detection

  and capture taking place indirectly.

  In another embodiment shown in the

  2, the wall of the tank 1 forms at least one inva-

  wherein the glove finger ginging is protruded inwardly and surrounded by water, thus constituting an open-out cavity 10. The blind cavity 10 is preferably intended to house the heating element 7, for example in the form of a barrel, which bathes in the air contained in the aforementioned cavity. Other similar cavities such as 12 serve to house the aforementioned instruments of

measurement and regulation.

  The tank 1 may optionally comprise an inner liner, in particular made of a plastic material such as that known commercially under the name of Rilsan or Teflon, to eventually complete the protective oxide layer forming skin of the metal. This coating is applied during the cooling of the molded part when it has reached the temperature suitable for

the application of this coating.

  Of course, the hot water production device may include other modifications, without departing from the scope of the present invention. Thus, it is possible to use, for example, a material having good thermo-conductive properties solely for producing the portion of the tank 1 comprising the heating element 7. The use of an aluminum alloy, especially a foundry alloy , for the realization of the tank 1

  makes this one practically unalterable. Indeed, oxy-

  superficial dation, favored during the molding, of the aluminum alloy forms a skin on the metal the

protecting against corrosion.

  Perfect internal smooth surface condition avoids

  any risk of withholding foreign matter and

  erosion, especially at joints of assembly.

  In a third embodiment, the heating body is constituted by a heating element, such as one or more electrical resistors directly.

  molded into the mass of the tank 1.

  FIGS. 5B and 5C show the case of resistance

  moldings 26, 27) in a concentrated manner at a local location, preferably close to the cold water inlet pipe 14 '. The above-mentioned resistors are molded into a locally thicker wall portion and protrude either inwards (27)

  either towards the outside (26) of the tank 1.

  In an alternative embodiment shown in FIG. 5A, a plurality of electrical resistors 28 are molded into the bulk of the tank at points spaced from the wall thereof. Advantageously, the resistors

  28 are arranged vis-à-vis thus allowing a heater

  stepfilling of the water contained in the tank.

  When the hot water requirements are lower than the capacity of the tank, these resistors allow the implementation of a fraction of the heating power adapted to the needs. These resistors also make it possible to restart heating by step, by heating

  fraction or selective slice of tank height.

  We can also adapt to the declining tariffs of the E.D.F. Moreover, when using a molded electrical resistance, the heat emission rate (in W / cm 2) of the known devices is conserved. In the embodiment shown in FIG. 2, the barrel resistor is shaped to occupy the entire space of the cavity 10. The fixation of the resistor is carried out by a metal barrel fixed on the one hand to the resistor and other hand to tubing

Claims (10)

CLAIMS V E N D I C A T IO N S   1.- Hot water production device of the type comprising a hollow body tank comprising pipe connection pipes, and a heating body, characterized in that said hollow body (1) is made at o5 mins partly in a material in particular metal capable of being molded, preferably in shell or under pressure with its crossings of   wall and possibly remains crude in the finished state.   2.- Device according to claim 1, characterized in that the aforesaid moldable material is selected from materials having good thermally conductive properties, and is preferably succeptible to be oxidized superficially during molding to form a protective skin.   3.- Device according to claim 1 or 2, characterized in that the aforementioned material is an aluminum alloy including foundry.   4.- Device according to one of claims 1, 2 or 3   characterized in that the above-mentioned hollow body container (1) is made in two parts (2, 3) assembled: - either by bolting or quick-fastening device sealing on flanges with possible interposition of a seal gasket, - by welding the two flanges, or by crimping,   - or by screwing an external part   threaded into the other internally threaded part.   5.- Device according to one of the preceding claims   dentes, characterized in that in each wall penetration (4, 4 ') is mounted removably a pipe (5, 5') made of a dielectric material such as in particular polyvinyl chloride, and fixed to said traversal of   wall (4, 4 ') by elements (6, 6') of dielectric material cudgel.   6.- Device according to one of claims 2 to 5   characterized in that the aforementioned heating element (7) is constituted by a block (8) preferably made of a material of the same nature as that of the aforementioned hollow body (1), in which the heating element is embedded ( 9) such as electrical resistance, which is removably attached and fixed in direct thermal contact with the wall said hollow body (1).   7.- Device according to one of claims 2 to 5   characterized in that the heating element (9) such as for example an electrical resistor is preferably housed removably in a blind cavity (10) of the wall of the   tank, protruding inwardly from it.   8.- Device according to one of claims 2, 3, 4,   , 7, characterized in that the measuring and thermal regulation instruments (11) are preferably housed removably in a second cavity (12) of the wall of the   tank protruding inwardly from it.   9.- Device according to any one of the claims   previous, characterized in that the above-mentioned hollow-body reservoir (1) has an internal coating, in particular a plastics material such as that known commercially.   under the name of Rilsan or Teflon.   10.- Device according to one of claims 2 to 5,   characterized in that the aforementioned heating element (7) is constituted by a heating element (20) such as for example an electrical resistance molded in the mass of the reservoir, either concentrically at a local location, or   distributed at several points in the tank wall.