DE1565425A1 - Thermal storage heater - Google Patents

Description

Dipl-Ing. August BoShOrt . [MAY NOT BE CHANGED I

Dipl.-In ?. Walter Jackisch ^l - »

Patent attorney · _.

Stuttgart- N, Menzelstrasse '46 1565425

O. Baukneoht "July 7, 1966 Company with limited liability

Electrotechnical factories, _{9a r /} , Stuttgart, Heidenklinge 20 ^{A iy lü} " ^BZ Heat storage stove

The invention looks at a heat storage stove with at least swei ssus? Heating of the storage medium serving, electrical H @ £ zk5rpern and with an oven thermostat which limits the temperature of the storage medium to an adjustable actual maximum value, the switching elements of which are arranged in a common connection line ^ i ü®n H @ issk5 ^ p @ rn and these when d @ ß © lng © 3tellten HSefestwertes the oven temperature abs ehalten ₈ and far "with a AufientemperaturfOhler which srtiaib the increase in au & the worn storage heater su heated space prevailing outside temperature via a - at least one brings IfindestwM addition of the OfenheiskOrpem unaMiängiges Steuerheisglied sur effect - vorsugsweise adjustable that is in heat-conducting connection with the furnace thermostat and its response wave when the outside temperature rises

Oven temperature values shifts

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00S822 / 044I

Electrically heated heat storage stoves of the type described above Kinds are connected to the electrical network at night and are supposed to be connected to the electrical network during this time Lacfezeit store so much myths that with it the during the following day, with the radiators switched off, the heat requirement required to maintain the desired level Room temperature can be covered. This heat demand is directed mainly according to the outside temperature and the prevailing weather. For this reason it is necessary to measure the heat capacity of the heat storage stove and that of its radiators Consumed electrical power of the size of the su heated Room and the expected lowest outside temperature. However, if the outside temperature is above expected If the lowest temperature is, it is not necessary to fully charge such a heat storage furnace. Besides, it is Sweok-wise, the respective charging of the furnace and the here The amount of heat to be introduced into the furnace also depends on the residual heat present after the discharge, which is still available at the beginning of the next charging process, vary below.

In known heat storage stoves are therefore those mentioned above Outside temperature sensors are provided, which are in heat-conducting connection with the storage medium of the furnace, as Charge limiter effective furnace thermostats to the lower Set the target specifications, the lower the for the

0Q9822 / 0U8

The next discharge period is the expected heat demand, i.e., the higher the outside temperature recovered by the outside temperature sensor independent Steuerheisglied su provided, which can consist, for example, of a resistance wire spiral wound on the furnace thermostat. This control heating element is supplied by the outside temperature sensor, the higher the electrical power, the higher the outside temperature rises. The heat developed by the control heater then overlaps that already generated in the storage medium by the furnace heating elements

so

Temperature with the effect / that the oven thermostat switches off the oven heating elements before the maximum possible temperature is reached.

It is also already known to distribute a number of electrical furnace heaters in the storage medium of a heat storage furnace to be arranged and in the common supply line to these radiators a switching element controlled by the furnace thermostat, For example, to arrange a safety contactor that switches off all heating elements when the preset oven temperature is reached. It is also known in the individual rooms of a building to provide a heat storage heater in each case, the furnace thermostat of which with one of an outside temperature sensor

009822 / 0U8 BAD

controlled, independent of the furnace heating element control heating element is provided and the control heating elements among each other to a common one connected to the Auesentesiperaturfühpler Connect the control line.

In all of these known heat storage heaters, however, it is disadvantageous that practically all furnace at the beginning of the cheaper Night electricity tariff it will be switched on, with each of the heat storage stoves at its full, for the Höohs & e at the lowest Outside temperatures to be stored amount of heat measured electrical connected load switched to the networkjwfrd. In addition to the sudden network load that occurs as a result the further disadvantage that at higher outside temperatures, which result in a correspondingly lower heat requirement, the switch-on tent of the individual heat storage stoves is only short.

The invention is therefore based on the idea of distributing the electrical power of a heat storage furnace of the type described at the outset to at least two ₍ preferably three or more heating elements distributed in the storage medium) and of making only those of these heating elements that can be switched on during the night to charge the storage medium. that can provide the necessary amount of heat for the following discharge time

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ie, the oven thermostat that is thermally conductive with it? Connected control element vmü which the control heater depending on the * respective level of the outside temperature brings into effect outside temperature sensor dr.su are used to limit the electrical connection value of the heat storage stove to a value adapted to the outside temperature, if you see the Outside temperature increased sufficiently far above the & em full connection value of the Wärsa®sp © icherofens underlying low temperature

In the case of a ¥ äm @ spei @ herofen of the type ₉ described at the beginning of the at least two sm? Efftfäsansng of Spsielserasadiums dieneM © ^ © electrical HeiskSrp on £ @ist and? A (Bsithermostaten with a fir säiss2, i © ^ he HsiakSsfpss g @ msin8®fesit5ii Bchaitorgän and at least @Ln .in dependence on the outside ^ ei & peratuf ¹ to effect mb ^ lngenües S1? © u © 2? l3i © iE member ₉ is therefore invention g © mis © ^ @ s? geselilsg®n _$ that the Stei2 © 2?! selggl! a <ä © in further Aea ^ eratiäS ^ aqpfit-ndälähea S @ Ml ^ gli @ d 8uge @ 5? Ä2iet is that Ιιί! Leihe with Q & ncsui & 3T M © lsk3rper is wa.u susazffii ^ n with you from % pm®% n & mmm Söfealt © 3? Ga ¥ ä des Oven thermostats ai £ ssch & l ^ arerti Farall @ l @ ^ i? © iiopel @ ^ um sniei ^ si hot body forms. It is gonaoli % w> ϋΙΠ3 @ 8ρΘ £ @ £ ι @? 3> ^ <§η ^ Im ;? the so firm feetraohtefe r> r ^ ®% .m® Bmioht®ll d @ s

erfeQs mwsiia®h © a <slen rice body an öa @ ^ ssm OftbsifcgiegBioBtsuera € £ 2? ® ^ b ^ activable

ä®v ~ ^ that with more than two heat bodies

009822/0448 bathroom

in the storage medium - the other radiators from them associated temperature-sensitive switching elements are ready to be kept switched off when the charging process starts the outside temperature assigned via these switching elements Minimum values have increased and consequently these Heating elements assigned to the minimum temperature values act on their switching element and this in its open position bring it or keep it in its open position.

In this way it is achieved that by connecting or disconnecting individual radiators, the connection power of the heat storage heater is changed and that of the outside temperature sensor determined, expected for the Ugende discharge period necessary heat demand is adjusted. By this at one compared to the full heat capacity of the heat storage heater Reduced heating power of the furnace radiator can be set up easily, since the available Charging time is still fully or at least largely used even with reduced heat demand · As a result of the reduced Heating output of the part of the heating element that can then still be switched on, it takes correspondingly longer until this part of the heating element the storage medium on the oven hexnostat for the final Absoh% tion of all radiators has reached the leading temperature. This is very much in line with the wishes of the electricity companies contrary, since now the heat storage stoves equipped according to the invention only at extremely low outside temperatures

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be switched on with their full electrical visual value, o with moderate cold values of the outside temperature, however, only with Fractions of their full connection value are used and then remain switched on correspondingly longer

In the case of heat storage stoves with at least three electrical heating elements for charging the storage medium, which preferably have at least approximately the same electrical power values among each other ₃ , it is advantageous if, according to a further proposal of the invention, the outside temperature sensor has two step contacts that move into their closed position one after the other when the outside temperature rises, of which each one is connected to one of the at least two control heaters.

Further details and appropriate further developments of the Invention arise in connection with the Untexsisprühen. from the embodiment described below, a in the drawing, partially only schematically shown heat storage furnace and its reproduced in its circuit diagram Control device.

The heat storage furnace contains in its housing 1 and inside the one enclosed by the housing! Insulating layer, not shown in detail, a storage medium S, in which three individual furnace heaters 2, 3 and 4 with each other approximately the same size electrical heating capacities are arranged.

BATH 009822 / 04A8 -8 »

In the example all three heatsinks are XOver a common connection line 5 on a phase line R of a rotary current ^, the center conductor of which is denoted by Mp. With a supply line 6, the bridge 1 $ of an oven thermostat OT, framed by broken lines and serving as a temperature regulator, is connected to this center conductor. This sits on a metal rail 17 serving as a thermal bridge, which is arranged in the immediate vicinity of the storage medium S and is warmed to a temperature that is only slightly below the temperature of the storage medium and transfers this temperature to a bimetallic strip 16a serving as a sensing element, which for example, the switch bracket 16 opens when it is

of the due to the / Wärebracke 17 radiated heat to about 100 G has warmed. This Anspreohwert the bimetallic strip 10a im Oven thermostats OT are only intended to serve as an example to make it easier to determine the mode of operation of the outside temperature sensor described below 15 see below explain.

The outside temperature detector 15 is outside the outer wall AM arranged, the su one otherwise not reproduced in detail The building belongs to the building, one of whose rooms is to be kept at the room temperature of about 20 ° C by the heat storage stove during the cold season. The feeler member 15a of the outside temperature sensor acts on two subsequent clocks 15b and 15c a. He brings the follow-up contact 15b into the one shown

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Closing position »if the outside temperature is too high? - 10 ° C. De? second follow-up contact l§e is only closed when the outside temperature rises above * 5 ° G

So that when the outside temperature rises, the heat storage furnace is heated to a correspondingly low final temperature during the night-time charging process and the furnace thermostat OT switches off the heat storage furnace prematurely before the furnace temperature of 100 ° is reached, the first follow-up contact 15b is connected to the furnace heating elements via a control line 13 independent control element 11 and a second control element 12 connected to the second follow-up contact 15c via a control line 14. Both lie over an unspecified one at the central point? Mp dss three-phase network, to which the phase line H belongs. The two following clocks 15b and 15c are also connected to this phase line and therefore lead to control heating elements 11 and IS in the shutdown position shown at outside temperatures above 5 ° C, if, for example, at the beginning of the nightly charging period from Elektrlaltftts · Werft on the two lines Mp and R voltage is given. The additional heat developed by the ^ elden Steuerheizglled @ rn ii imd IS in this case is over metallic® Wamsfosfueken 18a and l8b as well as a common wärm @ i @ i $ eMen BMck © 18

- 10 -

009822/0 ^ 48 BAD ORIGINAL

fed to the oven thermostat in such a way that even at a lm Storage medium S reached a band temperature of only 60 ° additionally supplied by the control heating elements 11 and 12 Amount of heat the temperature of the bimetal strip 16a on its Response visual wave increased by 100 °.

So for the relatively high, see below the switch-on position of the follow-up contacts 15b and 15c leading outside temperature the charging process required to reach the in this case significantly reduced oven temperature of 60 ° from the furnace smostat OT only shortly before the post-flow tariff expires ended and the charging period can therefore be extended as long as possible, only the heating element marked 2 is of the storage heater is connected directly to the switching bridge 16 of the furnace thermostat OT. With the other two radiators 3 and 4, however, are each a temperature-sensitive switch respectively, 8 laid in series, each of which salt a bimetal strip 9 or 10 is coupled. These bimetallic strips 9 and 9 are in this way in the radiation range of the control element associated with them 11 and 12 arranged that they interrupt the power supply to the radiators 3 and 4 »when the Steuerhevlzglieder via their follow-up contacts 15b and 15c of the external de-icing sensor 15 to the harrodhende between the lines Mp and R Tension are placed.

-U-

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When the outside temperature drops below 5 ° C, the second subsequent confcact 15c opens first and then switches off the control heating element ± 2 , whereby the switch θ, which is in series with the furnace heater H , is brought into its closed position by the now stretching bimetallic strip 10 and the furnace heater at the same time 4 parallel to the heater core 2 · As a result, the heating output effective in the heat storage heater is increased by the small amount of the heater 4 during the Kachtladsphase. At the same time, the response threshold of the oven thermostat OT is shifted towards a higher oven temperature, because the control heater 12 is now switched off and therefore no additional heat is transferred via the bridge 18b to the bimetal strip 16a of the oven thermostat compared to the case described above (both follow-up contacts 15b and 15c closed) can. The storage medium S must therefore heat up to a higher temperature so that the heat supplied by the Spsieherasadiuin via the roller bridge 17, together with the additional heat supplied by the Steu @ rheizgli @ d 11 via the bridge 18, can generate the response temperature of 100 ° on the bimetallic strip 16a .

If the outside temperature falls below -10 ° C, the

Control device e.g. one

first follow-up contact 15b from sensor 15a ~ "of the outside temperature sensor 15 brought into its open position and then switches the control heater 11 also from. As a consequence, that the switch 7 lying in series with the radiator 3

- 12

^009822/0448 badorW

ry - la -

is brought into the bin holding division by its bimetallic strip 9 assigned to the control heating element 11 In this way it is achieved ₉ that the furnace body 3 can also participate in the charging process and the effective heating output to compensate for the steady drop in outside temperature is reduced Due to the missing additional heating of the furnace thermostat OT, which has since been supplied by the Steu@rheizgl.led 11, the response threshold of the furnace thermostat is also significantly higher, namely slightly Send temperature values above 100 ° C because then only at this oven temperature above that alone effective thermal bridge 17 to the bimetallic strip l6a of the furnace thermostat OT so 'Fiel heat can flow that the The metal strip reaches the temperature of 100 ° required to switch off the entire heat storage furnace and the Sehaltbrücke 16 opens.

Xn of the arrangement according to the invention thus have; the control heating elements 11 and 12, which become effective as a function of the external temperature, have a double function, on the one hand If the temperature rises, adjust the sample value of the Oven thermostats OT against lower end temperature values of the Shift the storage medium gradually and at the same time the calorific values of the three radiators 2, 3 and 4 and thus the electrical connection values of the entire heat storage heater Reduce gradually according to the increase in outside temperature.

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(KLe & tseiten submitted »that the © charging seldom, the © the TOm outside temperature sensor set required s§lßd ₉ isnfeereinasaogr et & rk asig so that you see a smooth @ i © hmäBig @ r @ B @ 3fefci» g of the delivering electricity value © rgifefe die isessh next

the phase line R at the beginning of the and at the end of which is held out

dl © dargeetallt © Seh & t-anordnimg, the © in A'iss @ n temperature sensor @ 3? for lashrere in glolcharfeägea? built-up heat storage stoves are used kasan, w © sm dan Stemes? lx © izglied®3Pn Il -raid 12 ^ -entepsoähende Sfeeisesii ©! to $ i @ follow-up contact © 15b TOid 15 © Anges@fci3.®ss Brillesa

Instead of the bimetal switch 1, 9 bzif. 8, 10 or control heating elements U, 12, other switches whose actuating elements are of a mechanical type or, for example, an electronic type and whose control elements are temperature or pulse-dependent, can be provided, which are used to adapt the electrical connection value of the heat storage furnace to the Switch individual furnace heating elements on or off depending on the heat demand. Heating elements are also to be understood as meaning heating elements which are formed by tapping at least one heating element.

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Claims (1)

i1 copy . [not changed '--- Expectations 1. Heat storage heater with at least two for heating the Storage medium serving electrical radiators and with one, the temperature of the storage medium to an adjustable Oven thermostats that limit the maximum value, the switching elements of which in at least one supply line to the Radiators are arranged and this® switch off when the set maximum value of the oven temperature is reached, and furthermore with an outside perature filler? 7 \ of the Increase in the outside temperature outside the room to be heated by the storage heater above a - preferably adjustable - minimum value control independent of the furnace heaters:.-member preferably brings effect that with the oven thermostat in ^ heat conductive Connection and its response wave , a lower one when the outside temperature rises Oven temperature shifts, characterized «that the control element (11, 12) is another Switching element (7 »9 or 8, 10) assigned '.. 1st, which is in series with one (3 * 4) of the radiators (2, 3, Ί) lies and together with this one of the common u16 * l6) « Switching organ (16) of the furnace thermostat (OTf ) forms a switchable parallel current circuit to the other radiator (2). 2. Wärmespeleherοfor according to claim 1, characterized in that that the control element (11, 12) is a control heating element 1st and that the switching element (7, 9 or 8, 10) is temperature-sensitive is. 009822 / G448 ** ° <* &&, * · or 2 % heat storage furnace according to claim 1 with three heating elements preferably equal to one another at least sjralUtBrnä large electrical power values, characterized by « that all three radiators (2, j5, 4) in series with the Switching element (16) of the furnace thermostat (OT) are and that in the supply line to the second (3) and third (4) heating elements each have a temperature-sensitive switching element (7, 9 or · 8, 10}, with the two holding members each associated with a control heater (11, 12) that is independent of the heater and that can be controlled by the outside temperature sensor (15) is. 4. Heat storage furnace according to claim 3, characterized in that the outside temperature sensor (15) has two step contacts (1% 15c) which come into their closed position one after the other as the temperature rises, on each of them one of the control radiators (11, 12) is connected. 5. Heat storage furnace according to claim 4, characterized in that that the SteuerhJjezkörper (11, 12) have different high heating outputs. 6. Heat storage furnace according to claim 4>, with control heating elements approximately the same size, at the temperature-dependent switching elements assigned to them, the control heating power output characterized in that the temperature-dependent • - BAD ORIQfNAL 009822 / 0U8 - 3 - ■ Switching elements (7, 9 or 8, 10) different levels of response temperature, with the one with the lower response temperature belonging to that control heater, which is switched on first when the outside temperature rises. ·! Heat storage furnace according to one of claims Ibis 6, dadrash characterized that as temperature-dependent Schaltglleder Bimetal switches are provided. [8, heat storage furnace according to one of claims 1 to 7, characterized characterized in that thermal bridges (17, 17a, 17b, 18, 18a, 18b) - preferably made of metal - between the storage medium | S) and the furnace thermostat (OT) and between it and the control heating element (s) (11, 12). 009822 / 0U8