FR2474658A1 - ELECTRIC HEATING BOILER - Google Patents

Abstract

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

Description

The invention relates to an electric heating boiler

  that, for domestic use, which can be connected to a

  central heating with radiators.

  The existing electric heaters are generally

  individual, storage or oil bath radiators. By

  In addition, there are electric heating boilers, which require

  are a special electrical installation given the power they implement. This is also the case of

  electric storage heaters.

  The electric heating boiler according to the invention comprises heating resistors which communicate their heat to a fluid

  coolant. This fluid circulates in the installation which includes

mediators.

  One of the aims of the present invention is to propose a heat

  domestic electric heating system in which the samples are

  of heat between the resistances and the coolant are carried out

  with optimum efficiency, and with a minimum of losses.

  Another object of the present invention is to propose a heat

  electrical power whose power does not require special reinforcement

  of the electrical installation of the dwelling in which the

is used.

  Another object of the present invention is to propose a heat

  * diere electric which requires only a minimum of maintenance, which presents

a small footprint.

  For this purpose, the electric heating boiler according to the invention

  for domestic use, comprising a heating body, electrical heating resistances immersed in the coolant, an inlet and an outlet connecting the boiler to an outdoor installation of

  between which the heat transfer fluid circulates, is characterized

  by means of the fact that it presents means placed near

  least one of the resistances which divert the coolant and modify

  have its flow inside the boiler.

  The invention will be better understood if one refers to the description

  below and in the attached drawings which form an integral part

CRANTE.

  Figure 1 is a schematic overview of the cnaudiere

electrical device according to the invention.

  Figures 2 and 3 relate to different modes of setting -2-

  of the present invention.

  Boiler 1 is shown in FIG. 1 in partially exploded perspective. Inside the boiler. is the heating body 2, substantially parallepipedic shape. This heating body has a vertical section and an extended horizontal section.

  The heating body 2 comprises at least one electrical resistance

  placed horizontally in the elongated direction of the horizontal section. In the case of Figure 1, three resistors 3, 4 and 5, have been shown. The number of resistors is not limiting. In

  a preferred embodiment, this number varies between one and three.

  In a preferred embodiment, each of these

  sistances comprises three filiform resistors 6, 7 and 8, similar to

  the filiform resistance shown in FIG.

  These three filiform resistors are arranged in a triangle, substantially horizontally from the front face 9 to the rear face

of the heating body.

  These filiform resistances are composed of a resistance element

  filiform that describes an elongated loop 11, and both of which

  tremities 12 and 13 are located close to each other, on the face

before 9 of the heating body 2.

  The length of each filiform resistance is sensitive

  equal to the length of the horizontal section of the parallelepipedic heating body. Moreover, the overall width of the resistors,

  respectively 3, 4 and 5 is close to the width of the horizontal section

zentral of the heating body.

  The heating body further includes in its inferior part

  an inlet 14 for the coolant in return from the installation.

  heating. In its upper part, the heating body com-

  takes a starting line 15 to the heating system.

  In a preferred embodiment, these two channels

  14 and 15 are located on the two small horizontal faces of the

  heater. the urnae being located near the front face 9.

  the other near the rear face 'C.

  Also in a preferred embodiment, a deflecting cloud, not shown in FIG. 1, is located close to: the mouth of the arrival pipe 14 in the body of the vessel, so that the heat transfer fluid returns of the installation-aion: I - 3 - heating is distributed throughout the lower part of the body

heating.

  An expansion tank 16 and a circulation pump 17 are placed

  The heat transfer fluid, which in general is water, is connected to the interior of the boiler, respectively connected to the inlet and outlet pipes 14 and 15. therefore penetrates inside the heating body through the inlet pipe 14, located on its lower vertical face, possibly meets the baffle plate whose purpose is to distribute the coolant

  in the lower part of the heating body. The coolant circulating

  Then it is heated inside the heating body, is heated in contact with the resistances and then leaves the heating body through the pipe 15 and is driven to the heating installation possibly by the circulation pnmpt 17. The heating of the liquid to the contact resistances

  is facilitated by the advantageous dimensions of the resistances whose

  width and overall width are close to length and width

  of the horizontal section of the heating body.

  To improve heat exchange between resistors

  and heat transfer fluid, and thus improve the efficiency of the heat

  The heating element comprises means which divert the coolant and modify its flow inside the heating body.

  These means will be more particularly described with reference to the

  Figures 2 and 3 illustrate them in a non-limiting manner. In these

  two figures, for the sake of clarity, the part of the resistances

  killed inside the heating body was not shown.

  The means are intended to divert the heat transfer fluid from its normal flow, which would be an upward vertical flow, and to create braking and acceleration zones, in order to pass the maximum volume of the heat transfer fluid in the immediate vicinity of the resistances. of heating. The creation of braking and acceleration zones has the effect of dividing the volumes of coolant

  inside the heating body.

  These means can be realized according to several modes of setting

  implemented. They are located near at least one resistance and can

  may be placed either above or below it.

  Figure 2 illustrates them as baffles. In this figure, three different baffles have been represented, 18, 19 and 20, respectively under the resistors 3, 4 and 5. The location of the baffles

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in Figure 2 is not limiting.

  The baffle 18 consists of three plates, 21, 22 and 23,

  substantially horizontal, and of a width less than the width

  top of the heating body. Their rodent is equal to the length of the heating body. The plates 21 and 23 are fixed by one-of their long side,

  at different and neighboring levels, on one of the large vertical faces

  shims of the heating body, for example the face 29. The intermediate plate 22, located at a level between the two plates 21 and 23 is fixed on the other large vertical face of the heating body, that is to say the face 28. The three plates have a width between half and once the width of the heating body. Thus, the intermediate plate 22 is partially engaged between the two plates 21 and 23.

  fluid that will circulate between these plates will describe meanders and

  will therefore be diverted from its normal flow which would be rectilinear.

  Under the baffle, the coolant is braked

  made. that its flow is modified by the very presence of this last

  Niere. Moreover, at the exit of the chicane the fluid is accelerated, in

  particular because of the movement of movement generated by the pump 17.

  The flow of the liquid is thus modified by the presence of baffles,

  and a maximum volume of fluid will pass in the immediate vicinity of

  heating. Moreover, the baffle retains the caloporous fluid

  in the braking zone below it.

  The baffle is placed relatively close to the resistor near which it is located, so as to reduce the volume

  the acceleration zone and increase the volume of the braking zone.

  swimming. In the case where the baffle is placed under the resistance, the acceleration zone constitutes a small zone of relative overheating for the coolant In a preferred embodiment for a baffle located under the upper resistance the ratio of the volumes of the zone The braking rate below this and the acceleration above is between 1 and 5. Good results have been obtained with an equal ratio.

about 2

  Another embodiment of the present invention is shown in the form of a baffle 19. which is shown in FIG.

  Figure 2 under the resistance 4. This baffle is of the same type as the chi-

  cane 18, except that it has only two plates 24 and 25 fixed

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  - 5 - on each of the two large vertical faces 28 and 29. These two plates

  have a width of between one-half and one

  of the heating body, and therefore have an overlapping zone

  tial. As in the previous case, under the baffle, the coolant is slowed by the presence of this baffle. On the other hand,

  at the exit of the chicane the fluid is accelerated because of its

  by the circulation pump 17.

  A third mode of implementation of a baffle is represented

  FIG. 2 shows the baffle 20, situated under the resistor 5. This baffle is of the same type as the baffle 19, also comprising two plates 26 and 27. The width of each of the two plates is less than half the internal width. of the heating body 2, which has

  the effect that the two plates have no overlap zone.

  As in each of the two previous cases, the fluid is

  braked under the chicane, and accelerated out of it.

  Figure 3 relates to other embodiments of the present invention, which implement perforated plates. In a preferred embodiment, the perforations are circular, and

  placed in staggered rows on the different plates.

  One embodiment using a perforated plate is shown schematically by the plate 30 located under the resistor 3. This plate is placed horizontally inside the heating body, it has

  dimensions substantially equal to the internal dimensions of a sec-

  horizontal heating body. The perforations 31 of this plate

  therefore constitute a forced passage for the coolant, which

  is braked before the passage then accelerated at the exit of perforations

  rations. The flow of heat transfer fluid is thus modified so that a maximum volume of this fluid will be heated in the immediate vicinity of the heating resistor. In this ca. the

  plate divides the heating body into two areas. an accelerating zone

  located above it and a braking zone located between

  below. The volumetric ratio between these two zones varies in

  preferred embodiment between 1 and 5. Good results have been obtained

  States with a ratio of about 2.

  Another embodiment of the present invention provides

  perforated plates, with a width less than the width

  - 6 - the heating element and can be arranged in the same way

  baffles 18, 19 or 20. For example, the two plates

  drilled 32 and 33 in Figure 3 are arranged in a similar manner

  to the two plates 24 and 25 of the baffle 19 in FIG.

  The various plates which have just been described with reference to FIGS. 2 and 3 have been identified with respect to the resistance

  placed above them. The invention provides that these plates can

  also be placed above the resistance.

  The boiler according to the invention is equipped with at least one

  seems to be similar to one of those just described placed near a resistance. In the case where the boiler is equipped with several sets, they can be of the same type or a combination of the sets that have been described. It should be noted that the position of the sets of plates, baffles or perforated plates,

  assigned to them in the drawings and in the description in

  resistance to upper, lower and median resistance is not

tative.

  The boiler also comprises conventional devices

  to measure the temperature of the heated water, and to

  electrically one or more resistors according to the time

  the temperature of this fluid. It also includes devices enabling

  both to control the different resistors depending on the day and time, for example to turn on the heating even if the owner is absent, and to make the most of the night rate

from the E.D.F.

  Naturally, the boiler and its different modes of

  described above, are given here only as an indi-

  and other alternative embodiments could be adopted without

  as far beyond the scope of the present invention.

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Claims (15)

  1. Electric heating boiler for domestic use, com-   carrying a heating body, electrical heating resistances immersed in the coolant, an inlet and a connecting outlet   the boiler to an external heating installation, between which   circulates said heat transfer fluid, characterized in that it has means placed near at least one of the resistors   which divert the heat transfer fluid and modify its flow at the in- inside the boiler.   2. Boiler according to claim 1, characterized in that the heating element comprises at least one fluid braking zone and a fluid acceleration zone, said zones being separated by the said means.   3. Boiler according to claim 2, characterized in that the volume of the braking zone is significantly greater than the volume of the acceleration zone.   4. Boiler according to any one of the preceding claims   dentes, characterized in that said means are baffles.   Boiler according to claim 4, characterized by the   baffles consist of at least two horizontal plates   located at different levels and alternately fixed on each   one of the two large vertical faces of the heating body.   Boiler according to claim 5, characterized by the   fact that the plates have a common area of recovery.   7. Boiler according to claim 5, characterized in that the plates have a width less than half the width inside the heating body.   Boiler according to one of Claims 1 to 3,   characterized by the fact that said means consist of at least one plate with perforations.   Boiler according to claim 8, characterized by the   that the perforations are circular and staggered. -   10. Boiler according to any one of claims 4 to 7.   characterized in that the plates of the baffles are perforated.   Boiler according to claim 10, characterized by the   that the perforations are circular and staggered.   Boiler according to any one of the preceding claims   cedeentes, characterized in that it has a parallelepipedal shape 2474658 a - 8 -   of elongated vertical and horizontal sections.   Boiler according to any one of the preceding claims   characterized by the fact that the resistors are horizontal and have a length close to the length of the horizontal section of the heating body and an overall width close to its width.   Boiler according to any one of the preceding claims   cedentes, characterized by the fact that it includes an electrical supply   independent control for each of the resistors, which allows   modulation of the heating power.   Boiler according to any one of the preceding claims   cedentes, characterized by the fact that the inlet pipe is   on its lower horizontal face, and the outlet pipe is located on its upper horizontal face, one being located near the front face of the heating body and the other near of its posterior face.