LU81522A1 - IMPROVEMENTS IN SMALL AND MEDIUM CAPACITY DOMESTIC HEATING DEVICES - Google Patents

Description

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<1 r Τ \ g GRAND-DUCHY OF LUXEMBOURG

........ I ...... Sr ....... hm ....... £ du ------------- 1.7 .., ..7 ..,. 197.9 .______________ ((¾¾¾¾ Minister ...... rSS of the National Economy and the Middle Classes

Title issued: ........................................ d »Kfr

LUXEMBOURG Industrial Property Service

// '/ ·' / (/ Z ^ eman ^ e de Brevet invention I. Request

Monsieur Jean-Marie LOUYS, ..... 134, ..... bld ....... de ..... la Sauvenlëre, ............... .................... (1) B-4000 Liège, Belgium ..te.pres.ent.é ..... p.ag ·. · Ii ^^ & \ Æreylinger. ,,. And „_i.,. ^ Yers. ^ L.ng:, .. sms ..« en .... propr. iftfl. 46, rue du Cimetière, Luxembourg, acting as agents files _______ this ... dixr.s.ep.t ..... julll.e.fc .... mil ..... neuf .... .cent .... s.Qi.xanfc.esr.dixrneuÎ at .15 „. · .00 ........ hours, at the Ministry of National Economy and the Middle Classes, in Luxembourg: 1 the present request for obtaining a patent of invention concerning: ..Pe £ fedtiqnneme.nt.§ ..... au.s .... di.spq.sit.i.fe ... ..ds ..... ckauf. £ a.gs ..... dome.stlque ...... de ........ (4) - v small and medium capacity declares, in assuming responsibility for this declaration, that the inventor (s) is (are): ..the ..... depositor ..................... .................................................. .................................................. .................................................. .................................................. ...... (5) 2. the delegation of power, dated ................................ ........... the ^ .tZ ................................

3. description in French ............... language ............................ of the invention in two copies; 4 .............. 2 ............... drawing boards, in two copies; 5. the receipt of the taxes paid to the Registration Office in Luxembourg, the dix-.sap.t ..... j.uilla.t .... mil .... neuf ..... ce! .n.fc ..... s.Qixan.te.-dlx-ueuf .............................. ..................................

-v, claims for the above patent application the priority of one (s) application (s) of i / - / (6) ............! ...... .................................................. .......................... deposited in (7) ................ .................................................. ............... · .................................. ....................

on ............. L ................................... ................................................!. .................................................. .................................................. .................................................. ................... (8) on behalf of ......................... .................................................. .............. .................................... ...........................-...................... .................................................. ............... 0) take up residence for him / her and, if designated, for their proxy, in Luxembourg ............... .........................

„.4.6, ...... rue du Cimetière ..................................... .................................................. .................................................. ............................................. do) request deliverance of a patent for the subject described and represented in the abovementioned appendices, - with deferment of this issue to ......... 1 $ ............. ................. months.

Lé u ^ de ^^ ndâ.taires .......

[JM / _ / Π. Deposit Minutes

Ernas tJt. Freyliiiger /: the aforementioned patent application has been filed with the Ministry of National Economy and Middle Ages, Industrial Property Service in Luxembourg, dated: p. _17.7.1919

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f "J Pr. the Minister at 15.00 hours / 4 ^ ^ Ovde the National Economy and the Middle Classes, // <# 1, ρ · d · (k \ V i) ^ A 6801) 7_ \"% 7 // ___ p, lou.o2 / lu Ψ ht uctt

INVENTION PATENT

~ on behalf of: Mr. Jean-Marie LOUYS

at 4000 LIEGE (Belgium) i "Improvements to small and medium capacity domestic heating devices i i i / IX ^

The present invention relates to improvements made to domestic heating devices operating in particular on gas, of small or medium capacity, that is to say independent heating intended for an individual housing unit 5 of the single family house, apartment or mobile home, etc.

A number of individual dwellings are equipped with central heating in. gas of small or medium capacity conventionally comprising a burner, 10. a boiler and a hot water circuit connecting the boiler to. radiators ..

The ever increasing cost of fuels. at. encouraged some users to equip the radiators with thermostatic valves which allow the temperature of the various Ί5 different radiators to be adjusted according to the desired temperature in each room.

However, the undeniable savings which can result from the use of thermostatic valves, are nevertheless limited by the very design of the Burners generally equipping installations of the aforementioned type.

In fact, the burner for installations of the type indicated is an all-or-nothing type burner, that is to say a burner operating either at maximum during the burner heating period, or a burner operating at minimum, generally represented. by the flame of a pilot light, when a probe fitted to the boiler indicates that the water temperature in them a. reaches a setpoint.

In order to avoid heat losses, it was well thought out, to regulate or modulate the burner flame according to the needs, that is to say according to the calories distributed by the radiators. The systems used for this purpose, and comprising proportional thermostats with electric or electronic control, are most often applied to large capacity power stations, in order to be able to amortize their manufacturing price 35 and of Kiontage, because it s is generally expensive equipment. Indeed, these are generally valve devices. at. valves controlled by servo motor and comprising probes located at. the interior and. outside the home. Devices of this type are obviously advantageous in that they do not make it necessary to operate the burner at maximum power, in which case the output is poor ^ only in exceptional cases of peaks of high demand for heater.

The present invention therefore aims to provide simple means, which can possibly also be adapted to existing installations of the type mentioned, which makes it possible to regulate the flame of the burner in order to provide fuel savings as a function of the power required.

The object thus aimed for is achieved by a domestic heating device 10 operating, preferably with gas of the indicated type, equipped with a burner, a boiler and a hot water circuit connecting the boiler to radiators. equipped with thermostatic valves, which has the inventive characteristic that the quantity of fuel delivered to the burner is re-regulated by the pressure of the water from the heating circuit returning to the boiler.

When, under the effect of one or more thermostatic valves, one or more radiators are taken out of service, this causes a change in the pressure (and consequently in the flow rate) of the water in the heating circuit. on his return . â the boiler and it therefore becomes simple to control the quantity of fuel admitted to the burner, without the use of complex devices of the prior art. The very principle of the invention therefore provides considerable simplification in the adjustment of the burners, making it possible to reduce their consumption.

The heating device of the invention can be fitted either with a pump ensuring the circulation of water in the circuit, or be without it, in which case the circulation 30 is effected by thermosyphon.

The heating system is, in principle, at. with the exception of the characteristic improvement of the invention, similar to existing devices. It notably comprises conventional safety equipment, boiler thermostat preventing excessive overheating, pilot burner pilot fitted with a safety device, etc.

This heating system will also be equipped with / preferably a regulation of the intake of air intended for combustion in a conventional manner, by an air shutter. According to an advantageous embodiment of the invention, it is also possible to regulate the quantity of combustion air admitted, as a function of the pressure of the water from the heating circuit returning to the boiler.

The burner used in installations of the aforementioned type is generally an "atmospheric" burner, but the use of a blower also falls within the scope of the invention.

Advantageously, the regulation of the quantity of fuel delivered to the burner is effected under the effect of a re-regulator with a membrane sensitive to pressure or to flow; heating water returning "to the boiler. The advantage of using such diaphragm regulators is that they exist on the market because they are widely used for domestic water heaters. These systems are well known and are perfectly safe, robust and reliable.

The improvements made according to the characteristic of the invention to. domes- heating installations; tick may apply to. new installations but can also be added to existing installations, without great difficulty since they are complementary elements which are easy to assemble, without great cost.

The invention will be described in more detail using an exemplary embodiment which illustrates, schematically and. without any limiting nature, an embodiment of the invention. In the drawings: FIG. 1 represents the diagram of a gas central heating installation; - Figure 2 shows the diagram of a regulator.

In FIG. 1, a water circuit 30 9 has been shown, starting from a boiler 1 heated by the flame of the burner 2.

The circuit includes a circulator 3 and is connected to radiators 4, mounted in parallel, equipped with thermostatic valves 5. Then, the hot water circuit returns to the boiler 1. -An expansion tank 6 is derived on the circuit which is in principle closed 35, except for the supply of external water by a pipe 7 fitted with a valve 8 to compensate for any possible losses. The gas admitted via line 10 to the burner frf 1 is regulated by a valve .11 itself controlled by a regulator. at. membrane 12. This membrane regulator is. integrated ; I * ./, circuit 9.

I am in the

The diagram of this regulator ,, which is moreover I well known in household water heaters is represented in FIG. 2. The water derived from circuit 9. is admitted by "the line I 5 13 'in the regulator equipped with a membrane 14 provided with an I by-pass 15 and actuates a rod 16 controlling the admission of the fuel to the burner. A water intake valve 17 makes it possible to act on the rod 16 as a function of the variable pressure difference between the inlet 13 'and the outlet 13 ".

I 10. The operation of the device is as follows.

I When the thermostatic valves 5 are opened, the loss of I charge created in the circuit by the circulation of water in I the radiators 4 results in a pressure loss on the return I 'of the water in the boiler 1 which is detected by the regulator I 15 12, which for example causes the burner to go to maximum speed 2. As the desired temperature is reached I in the various rooms where the radiators can be found, I certain thermostatic valves 5 close again and the reduced pressure drop acts on regulator 12, which reduces the I · 20 quantity of fuel admitted to burner 2 ..

I It is therefore possible, without recourse to electronic or other devices I, necessarily expensive and which may be subject to breakdowns, to regulate in a simple manner the power of the heater as required.

I 25 The physical values recorded in operation I were determined on an experimental installation which is the subject of the example which follows.

Example I A central heating system is equipped as follows: I 3Q: I - a Vaillant brand bath heater, type Mag 250, I - a circulator, I - a nitrogen tank, I - 4 thermostatic valves, I 35-4 radiators, I according to the diagram in Figure 1, The system is based on the flow I of water returning to the boiler. When one or more thermostatic valves are cut, the demand for water from the radiators I U is reduced, the water regulator which controls the gas valve r.

balances and this results in a drop in pressure to the injectors.

The fuel used is propane. The experimental device does not include a meter, the flow rates of 5 gases in m / h are given by the difference in pressures and the formula: 19 x K xx in which D represents the density of the gas, P the pressure ex-10 awarded in millimeters of water column, D the diameter of the pipe and K a viscosity constant depending on the diameter of the pipe.

The installation uses propane gas which is admitted into 10 injectors of 0.5 mm in diameter.

* When four valves are open, the pressure 15 of the gas is 300 mm of corresponding water column, at a power of 15,000 Kcal / h. For three open valves, the gas pressure is 200 mm of water column corresponding to. a power of 12,460 Kcal / h .. When two valves are open, the pressure is reduced to 100 mm of water column corresponding to 20. a power of 8.89.0 Kcal / h while when only one valve is open , the gas pressure goes down to 50 mm of water column which corresponds approximately to a power of 6.350 Kcal / h.

Although a preferred embodiment of the invention has been described, it should be understood that numerous variants can be made to it and that elements can be replaced by equivalent elements well known in the art. skilled in the art.

The invention is in particular not limited to the type of fuel used, although preference is given. at. gases of the butane, propane or natural gas type.

The invention applies to new installations but also to the transformation of existing installations.

/

Claims (7)

1. Domestic heating device preferably operating with small or medium capacity gas, equipped with a burner, a boiler and a hot water circuit 5 connecting the boiler to radiators fitted with thermo valves -static, characterized in that the quantity of fuel delivered to the burner is regulated by the pressure of the water in the heating circuit returning to the boiler. 2. Device according to claim 1, characterized in that a pump ensures the circulation of water in the circuit. 3. Arrangement according to claim 1 characterized in that the circulation of water in the circuit is effected * by thermosyphon. 4. Device according to any one of claims 1 to 3 characterized in that it is equipped with a regulation of the admission of air intended for combustion as a function of the pressure of the water of the heating circuit returning to the boiler. 20. 5. Device according to any one of claims. 1. to 4 characterized in that the regulation of the quantity of fuel delivered to the burner is carried out under the effect of a membrane regulator. 6. Application of the device according to any one of claims 1 to. 5 for mounting on new installations before putting them into service. 7. Application of the device according to any one of claims 1 to 5 during assembly on existing installations with a view to their transformation. 1'- '/