FR2517031A1 - DEVICE FOR A REGULATED ELECTRICAL HEATING BLOCK AND AN EXPANSION CHAMBER - Google Patents

Abstract

1. A central heating installation with two energy sources comprising a closed circuit of a heat transfer liquid circulating between a boiler and a plurality of radiators distributed over the various parts of the building to be heated, according to which installation at least one radiator is equipped with an electrical heating element (2) disposed in the lower collector of the radiator, said installation being characterized in that said radiator comprises in its upper collector (1b) means for compensating thermal expansion (3) including an elastically deformable wall (32) limiting an inner chamber (48) immersed in the heat transfer liquid and provided with means (33) for causing its volume to communicate with the surroundings outside said radiator.

Description

251703 1

  The present invention consists in the modification of a central heating installation type euel or other energy in individual electric heating by the contribution of

  two devices on all types of liquid radiators.

  The first device consists of a 4 mm diameter, shielded aluminum heat resistor fixed on a plastic plug and a solid expansion thermostat (mechanical system) or an electronic one positioned on the same plug. The assembly has a compact block. just connect to the power grid to get a

  elevation of the temperature of the liquid contained in the radia-

  to the desired value and to ensure the regulation of

this one.

  The second device is an expansion chamber which, due to its variation in the volume of the pressure inside the radiator, makes it possible to avoid noise during

  the circulation of the liquid due to the excess of air and

  holds an oonatant volume of it inside.

  The attached drawings represent on the one hand the first

  first device seen in section in both veisions, mechanical

  (fig 1) and electronics (fig 4), as well as the electrical

  of the second version of the thermostat (fig 5), and secondly, the second device seen in section (wire E 6) is also attached, a diagram of operation of the heating block and similar thermostat for the two versions, showing the rise in temperature over time (fig 2) and

  the current used for the same duration (FIG. 3).

  Both devices are equipped with a cylindrical plug

  only three quarters of an inch in diameter, standard thread (4)

  they are put in place on the chosen radiator.

  To do this, after closing the inlet valve, a plug at the bottom of the radiator (3) is removed and the bleed plug is emptied of the contents and assembly of the two devices.

  thermostat-resistance block (1) at the bottom and the expansion chamber

  tation (2) replacing the drain plug Reopening

  of the radiator filling pad,

  The installation is again in a normal operating state, that is, integral with the central heating circuit.

  makes the electrical connection by means of a standard

  located at the nearest power point.

  In order to commission the proposed system, the water supply is blocked by closing the radiator inlet valve. The function is activated by rotating the control lever (5) until to positioning

  corresponding to the value of the desired temperature (approx.

  from 3500 to 9000); the resistor (6) goes into operation and raises the temperature of the radiator until the triggering of the

  thermostat that occurs when it is reached.

  In the case of the mechanical system (fuel), the 4

  the elongation of the seonde (stainless steel tube 4 mm)

  (7) which is transmitted to the low coefficient of expansion rod

  (8 a) 2.5 mm; this leads to a trac-

  tilting spring support (9) acting on a

  abutment made of insulating material (O 10) by means of

  their (11) When the traction reaches the value necessary for the support of the tilting contact (12) to switch, the latter changes state and interrupts the current flow (Ir). There is then cooling of the radiator by heat exchange with the ambient air, the resistance being more in use When the temperature of the water contained in the radiator reaches an amplitude value (T 1) of 500 to 1000 less than that chosen (13), there is reversal of the movement of support

  contact and restoration of current passoeage through

  the upper contact (14) the regulation (t 2) is

  The reference for obtaining a correct range (AT 1) of the thermostat is by the value of the thread pitch of the adjusting nut (15) and by the positioning of the control shaft

  (16) with respect to the rocker spring support The position

  Zeroing is obtained by the stop spring (17) and the rotation angle of the control by a cam (18). The compression spring (19) providing the return for operation of the rocker spring has a value of 4 Eg F. .

  For the elecniconic system, (Pig 4 and Fig 5), the heating

  The probe (7) is transmitted to the thermistor (20) -3- located inside it by contact. The decrease in the value of the CTN changes the current and voltage of the bridge.

  consisting of Ri (21) and R 2 (22) driving through

  of the circuit 4 CPO 8070 (23) the change of state of the control of the triac (24) held by a screw (43) on a finned cooling plate (44) whose heat exchange is done by means of ventilation holes (45) located in

  the hood (46) The value (13) being reached, there is

  resistance (6) displayed by an indicator (26).

  control is by the potentiometer (25).

  Electrical connections inside the plasma block

  (27) are made by AMP terminals (28) and plugs (47), the

  the resistance of the armored resistor and the probe by a gasket (29) compressed by the plastic support (30) The fixing of different parts is ensured by

rivets (31).

  In parallel with the operation of the resistance-heat block

  mostat, the expansion chamber (52), when the temperature rise (Atl) is compressed under the pressure of the liquid and

  the excess air is discharged through the orifice (33).

  the shape and shape of the chamber must allow for a change in

  its volume, which is about 25 cm 3 for a

  at least equal to the value of a normal network of adduc-

  water and the maximum pressure at a pressure of 15 bar For this, metal filaments (34) are embedded in the material used to manufacture the chamber The orifice (35) after opening the bleed screw (36) has the classic role of air evacuation In the center of this, is located the ball (37) compressed by the spring (38) calibrated by the screw (39) which plays the role of pressure relief The opening will be done in the case of a pressure greater than 15 bar which may occur by a possible production of steam due to a failure of the thermostatic system and which will escape through the orifice (40) located inside the screw (39). ) Etanohéité is ensured on the one hand by the seal (41) for the bleed screw and by crushing insured by the plug (42) for the expansion chamber, -4- In case of impossibility of maintenance of the pressure of the liquid in the radiator (very old installation), the

  setting up a simple stopcock on the exit

get the result.

  For an increased diameter of the radiator inlet ports, an inner-outer threaded plug allows adaptation.

  The electronic thermostat described is based on

  specific problems, but it is clear that multiple

  possibilities are allowed depending on the technology (transistors, integrated circuits) and the chosen manufacturers, this area

  being constantly evolving.

  The invention is a natural extension of the

  energy saving and which consist in particular to practice the reinforcement of insulation of the buildings Indeed,

  after improving the thermal insulation of his house iadi-

  vidual or other local, and that they then fulfill the conditions recommended for an integrated electric heating system, the aforementioned devices make it possible

  the choice of the heating mode (elektric or based on the

  fuel) in all seasons and according to his desiderata,

  either as a backup or for the entire installation.

  1 Device consisting of a regulated electric heating block (1) associated with an expansion chamber (2), characterized in that the first device consists of a shielded resistor (6) and a thermostat having a m 8 th b-loo (27) as support, the second having a chamber (32) and a screw

  purge (36) fixed on a mid 9 me plug.

  2 Device comprising an expansion chamber (2) according to claim 1, characterized by the fact that the screw of

  puxrge (36) has in its center an ecstasy of stw Dreosion.

  compomée of a ball (37), a rezcort (3 e, ot a screw (39).

  3 resistance-thermostat device (1) according to the rse Ve i% di.cati on 1 crctis in that the thermoostat probe (7) and the shielded r 5 sistanoe (6) have a small diameter of 4 mm aa are fixed * s on a wood; c-hon of diam Zeta 2 ee three quarters of an inch

(4,).

  4 Device 6 eietance-thesrostat (1) zeloil the weven-

  1 characterized by the possibility of having a thermostat

with a mechanical system).

  Resistance-thermostat device (i) according to claim 1, characterized in that it is possible to have an electronic thermostat "M = 2