EP1128134B1 - Electric storage heater - Google Patents

Description

The invention relates to an electric storage heater according to the preamble of claim 1.

The heat emission in devices of this type takes place primarily through Convection via the above, located in the area of the housing cover Warm air outlet openings. The increases in the lower area of the Cooler room air entering the device as a result of its warming conditional, buoyancy through the heat storage core. The one so heated With storage heaters of this type, air is initially arranged at the highest point above the heat storage core Warm air collecting room, the so-called cathedral collected. Dependent on of the room temperature changes in the operating state one of a bimetallic valve flap on the top of the Domes, the cross section of hot air outlet openings between the Limit positions "closed" and "open" such that the amount of from the cathedral through its warm air outlet openings and then exiting through the warm air outlet openings of the housing Warm air depending on the room air temperature and the am Device set room temperature is controlled in a simple manner.

Known devices of this type (DE 41 33 301 A1) are usually like this built that the heat storage core front, rear and side of is surrounded by thermal insulation and that this is against the corresponding Supports the housing walls. The top of the heat storage core horizontal insulation has openings for the air outlet on by a slider or a flap more or less be opened.

To i.a. to reduce the outside wall temperatures and heat exchange There are also devices to optimize that have an inner and an outer housing exhibit. For these devices, the one in the previous paragraph described arrangement housed in a larger housing. The resulting gap between the inner and outer housing walls acts as a convection shaft. The one from here escaping warm air is above the cathedral and below the outer housing cover directed to the hot air outlet openings and then passes through it, permanently and unregulated in the operating state into the room to be heated.

The sliders provided to regulate the air outlet from the cathedral or flaps are complex and prone to failure.

From EP-A-0 452 050 an electric storage heater is known from which the top wall has a roof shape and in one of the roof slopes warm air outlet openings are provided, the optionally closed by a multi-angled valve plate or can be released by placing a bimetallic element on one of the Bends in the valve plate.

The aim of the invention is to provide an electric storage heater to create the type mentioned, in which the regulation of air passage through the warm air outlet openings in the cathedral is realized in a particularly simple manner and the susceptibility to malfunction in running operations is minimized.

To achieve this object, the invention provides the features of the characterizing Part of claim 1 before.

According to the invention, the ridge is at the same time as a tipping edge for the Valve plate used, which makes a hinge in the actual sense unnecessary is. The flat design of the valve plate enables a special simple production, for example by a single sheet metal stamping process.

According to claim 2, the closing force for the valve plate alone by the preponderance of that which extends over the warm air outlet openings Partially guaranteed.

Advantageous further developments of the articulated attachment of the valve plate on the top wall one can see claims 3 to 8.

In the known devices of the type according to the preamble of the claim 1 is the housing of the four side walls, the bottom and the lid with dome, that is assembled from individual parts. This solution is in shape because of the large number of different individual parts of sheet metal parts and the necessary connecting materials - also with regard to procurement and / or stockpiling - as well the corresponding assembly effort, especially with regard to a rational series production, uneconomical.

Claim 9 defines a development of the storage heater according to the invention in that it consists of as few individual components as possible exists and is nonetheless stable and easy to assemble is.

According to the invention, individual housing elements are both indoors and outdoors - in terms of manufacturing, Procurement and storage and assembly, in a meaningful form as one Part summarized.

In an embodiment of the invention, the housing has internal parts in which a single component as a housing inner part at the same time front or Back wall with bottom and lid included. In an advantageous embodiment is the bottom, back wall and lid from just one, made according to large sheet metal blank.

According to the invention, the cover is at the same time designed to function of the cathedral. The cathedral also has a pointed roof-like one Lid on which the ridge is arranged in such a way that it also acts as a Tilting edge is used for the air flap. It is particularly useful if the air flap in appropriate holders in the form of, from which Lid bent tabs is stored. In a continuing Embodiment, the floor has one on its long side, upwards standing bend to center the floor insulation and as lower bracket for the inner front wall. After all, it makes sense also on the side of the lid facing the front, a downward-facing, L-shaped bend to attach the inner front wall and to accommodate the upper thermal insulation appropriate. While both the bevels on the floor and on the At the same time cover holes for screwing on the inner housing front wall include, are both in the area of the back wall, the floor and the lid with additional side folds Holes are provided for screwing on the side walls.

In a further design variant, all control devices are on one Pre-assembled mounting plate. This controller assembly makes it much easier the final assembly and thus shortens completely even when servicing significantly the assembly time.

According to the invention, an outer housing part is provided, which cover and front wall including attached to the top of the device and with only two easily accessible screws, particularly easy to install is attached.

Further advantageous embodiments of the invention can be found in the Claims 10 to 26.

Figur 1

eine perspektivische Ansicht eines zusammengebauten erfindungsgemäßen Elektro-Speicherheizgerätes,

Figur 2

eine perspektivische Vorderansicht des erfindungsgemäßen Elektro-Speicherheizgerätes nach Figur 1 bei abgenommener Außen-Vorderwand,

The invention is described below, for example with reference to the drawing; in this shows:

Figure 1

2 shows a perspective view of an assembled electric storage heater according to the invention,

Figure 2

2 shows a perspective front view of the electrical storage heater according to the invention according to FIG. 1 with the outer front wall removed,

Figur 3

eine ähnliche perspektivische Ansicht des erfindungsgemäßen Elektro-Speicherheizgerätes bei abgenommener Innen-Vorderwand und rechter Seitenwand,

Figur 4

eine schematische perspektivische Ansicht des Gegenstandes der Figur 3 schräg von der rechten Seite,

Figur 5

eine perspektivische Ausschnittsansicht des Gegenstandes der Figuren 3 und 4 schräg von oben,

Figur 6

eine teilweise geschnittene Seitenansicht des erfindungsgemäßen Elektro-Speicherheizgerätes von der linken Seite her,

Figur 7

eine perspektivische Ansicht des beim erfindungsgemäßen Elektro-Speicherheizgerät verwendeten Tragkörpers und

Figur 7a

eine vergrößerte perspektivische Ausschnittsansicht des Gegenstandes der Figur 7 im Bereich der herausgestanzten und herausgebogenen Vorsprünge für die Halterung der Ventilplatte.

Continued on page 6 of the original description

Figure 3

a similar perspective view of the electric storage heater according to the invention with the inner front wall and right side wall removed,

Figure 4

3 shows a schematic perspective view of the object of FIG. 3 obliquely from the right side,

Figure 5

3 shows a perspective cutaway view of the object of FIGS. 3 and 4 from above,

Figure 6

a partially sectioned side view of the electric storage heater according to the invention from the left side,

Figure 7

a perspective view of the support body used in the electric storage heater according to the invention and

Figure 7a

an enlarged perspective detail view of the object of Figure 7 in the region of the punched and bent protrusions for holding the valve plate.

According to Figure 1 has an electric storage heater according to the invention Housing 13 with a vertical outer front wall 28, one on top adjoining inclined wall 41 with hot air outlet openings 12 and a horizontal outer cover wall 42 connected to it at the top and Outer side walls 45 and an outer rear wall 38. side flanges 47 on the walls 28, 41, 42 and 38 form the outer side walls 45 additional side covers. At the top of the outer rear wall 38 a covering flange 42 which complements the outer cover wall 42 and is partially beveled 48 provided, which together with the outer top wall 42 Convection air outlet only from the hot air outlet openings 12 of the Inclined wall 41 ensures.

According to FIGS. 3 and 6, there is a storage core 14 inside the housing 13 arranged, which is composed of individual memory stones 14 ', only a single one of which is shown in FIG. 3, for example Simplify representation. Within air duct 19 of the Memory core 14 also extend to be seen in FIGS. 4 to 6 Rod-shaped electric heating elements 15. As with such electric storage heaters Usually, the heating elements 15 are on all sides of memory stones 14 'surround, as shown in Figure 6 in detail. In Figure 6 there are two levels of two adjacent storage stones 14 '.

According to FIGS. 3 to 6, the storage core 14 is plate-shaped on all sides Surrounding insulating material 16, which is fireproof and an uncontrolled Prevent heat emission from the memory core 14.

As can be seen particularly clearly in FIG. 6, the arrangement is from the memory core 14, the heating elements 15 and the insulating material 16 housed in a support body 25 made of sheet metal, as he is shown in isolation in Figure 7. The support body 25 consists of a flat Inner rear wall 26, from the bottom a flat bottom wall 27 at right angles is turned forward, while at the top one is also forward curved top wall 21 which connects to the shape of a flat roof has two inclined walls 21 ', 21 "in a straight roof ridge 21 "'converge, the horizontal and parallel to the inner rear wall 26 runs. In the front inclined wall 21 'are side by side several warm air outlet openings 18 are attached.

All around are the edges of the inner rear wall 26, the bottom wall 27 and the top wall 21 with angled forwards or upwards or downwards Stabilizing and fastening webs 29 provided in which the mounting holes 52 are provided at suitable intervals.

7a are two U-shaped at a distance near the roof ridge 21 '' ' Punchings 23 'are provided which extend to the roof ridge 21' '' and from which a rectangular planar projection 23 is bent upwards is. In this way, a holder for one according to FIGS. 2 to 6 created valve plate 17, the two to the projections 23rd has complementary openings 24. The valve plate 17 has one essentially rectangular shape, the openings 24 in the area of the projections 23 projecting upwards from the roof ridge 21 ″ are located. As can be seen particularly clearly from FIG. 5, it extends the valve plate 17 to one another over the provided in the inclined wall 21 ' lying hot air outlet openings 18. According to Figure 5 are e.g. three such hot air outlet openings 18 arranged side by side. According to FIG. 7, however, there can also be five or more in a row warm air outlet openings 18 running parallel to the roof ridge 21 '' '.

When placed on the top wall 21, the valve plate extends 17 over the roof ridge 21 "'in the area above the second Inclined wall 21 ", where, however - to include the heat radiation from Memory core 14 does not affect the bimetal 22 - a section 57 (Figure 5), so that at its other end a projecting Area 17 'is present. The dimensioning of the valve plate 17, the projecting area 17 'and the cutout 57 is such that the area extending over the front inclined wall 21 ' Valve plate 17 opposite the area lying above the inclined wall 21 " is overweight and in this way the valve plate 17 by itself by their own weight in the closed position shown in the figures.

The area 17 ′ projecting to the rear is covered by a bimetal 22 acted upon from above, which is attached to a mounting plate 51, which in turn by means of screws and screw holes 54 on the rear Inclined wall 21 "is attached. All are also on the mounting plate 51 Control devices with controls, such as control buttons 55 and a controller assembly 50 summarized. This mounting plate is only by means of two mounting holes 54 shown in Figure 5 on the rear Inclined wall 21 "attached, so that easy removal is possible when servicing is.

According to FIGS. 2 to 5, supply from the side of the controller module 50 down to the heating elements 15 leads 58 with the latter Electricity. The mains connection is located behind the right inside wall 33, in the floor pan 31, to the right of the rail foot 35th

According to Figures 2 to 6 are isolated on both sides of the in Figure 7 shown supporting body 25 attached rectangular inner side walls 33, by means of screws inserted into screw holes 49 (FIG. 4), which also in the counter mounting holes 52 in the side stabilization and engage fastening webs 29 of the supporting body 25 (FIG. 7). In this way, the support body 52 through the inner side walls 33 stabilized.

The side walls 33 also serve to support the supporting body 25 on the floor, extending down over the bottom wall 27, where a floor pan 31 is provided which is spaced below the bottom wall 27 runs and about the same size as this having. The inner side walls 33 are supported on the end regions the bottom of the floor pan 31 and are there by suitable fasteners attached.

Below the floor pan 31 are according to Figures 2 to 4 in lateral distance rail feet 35, which are perpendicular to the outer front wall 28 extend and the support body 25 with all arranged therein Components over the floor pan 31 and the side walls 33 support.

The floor pan 31 forms below the storage core 14 Air duct 32 extending transversely below the support body 25, from below to the air passage openings 30 and the passage openings 30 ' borders. Above the air passage openings 30 are in the insulating material 16 vertical air duct channels 19 ', with the air duct channels 19 communicate in the memory core 14 (FIG. 6).

6 are located in the insulating material above the air duct 19 16 further vertical air ducts 19 ', with their Warm air outlet side 37 in a between the flat top wall of the top plate made of insulating material 16 and the roof-shaped Upper wall 21 formed warm air collecting space 20, which when closed Valve plate 17 is closed to the outside.

The air is supplied to the air guide channels 19 in the storage core 14 thus through the air channel 32 formed by the floor pan 31. This is via rear air inlet openings 11 and a front Air inlet gap 36 (Figures 2 to 6) with the ambient atmosphere connected.

The support body 25 (FIG. 7) is through the inner side walls 33 completed by an inner front wall 34, which by means of screw holes 52 (Figure 2, 3) on the front stabilization and fastening webs 29 of the support body 25 is attached and on the front, on the Insulation material 16 provided in the storage core 14, which has a plate shape, rests. Between the inner front wall 34 and the outer front wall 28 there are spacers 40.

According to FIG. 6, the outer front wall is at a distance from the inner front wall 34 28 with the inclined wall 41 and the outer top wall 42 attached, the spacers 40 ensure a defined distance. The outer front wall 28 is fastened in that one provided at the rear of the outer top wall 42, downward projecting flange 59 behind suspension means designed as sheet metal strips 43 engages, which according to Figures 4 and 6 from the front end of the cover flange 48 of the outer rear wall 38 extend upwards. Below is the Fixing the outer front wall 28 by screw holes 44 (figures 1, 6) inserted screws with a side flange, not shown the outer front wall 28 cooperate.

In addition, the outer rear wall is at a distance from the inner rear wall 26 38 provided, with a defined distance through there also provided spacer 40 is guaranteed.

The spaces between the front walls 28, 34 and the rear walls 26, 38 form vertical convection shafts 39 (FIG. 6), which communicate with the surrounding atmosphere below and above in the largely closed except for the warm air openings 12 Room 60 opens above the top wall 21.

According to FIG. 4, the suspension means 43 also sit on the sides in this way continued that when the outer front wall 28 is suspended, the purpose corresponding optimal completion is guaranteed. Be in the back the suspension means 43 by one of the cover flange 48 upwards protruding vertical flange 43 formed, according to Figures 4 and 6 of the flange 59 of the top wall 42 can be engaged. A seal not necessary.

According to FIG. 5 there are also passage openings in the lower insulation 16 53 provided for the connection ends of the heating elements 15, which with communicate through openings 30 'in bottom wall 27 (FIG. 7).

FIGS. 6 and 7 also show one of the front stabilizing and fastening web 29 of the top wall 21 projecting to the rear Support flange 56, in the assembled state according to the figure 6 engages under a ring step 61, the bottom of the upper plate made of insulating material 16 is provided and in which the front plate made of insulating material 16 lies in the manner shown in FIG. 6. In this way a particularly stable mounting of the insulating material 16 is ensured.

The assembly and operation of the electrical storage heater described are as follows:

After removing one provided on the screw holes 44 according to FIG Cover can be unscrewed two fastening screws, whereby the outer front wall 28 with the inclined wall 41 and the External top wall 42 removed from the suspension means 43 upwards can be. The assembly is done in reverse.

The room air is extracted by convection through the openings provided 11 (Figure 6) in the floor pan 31 and below the outer Housing walls 28, 38, 45 sucked into the air channel 32 of the floor pan 31. The room air passes from this air duct 32 through the air passage openings 30 (Figure 7) and the air duct 19 'in the Air guide channels 19 of the memory core 14.

Another part of the room air sucked in below passes through the front, side and rear convection shafts 39 in the device. To FIG. 6 is the convection shaft 39 integrated in the rear wall 38 open at the bottom, so that air can enter directly here.

In the operating state, that through the convection shafts 39 heats up air flowing through it only because of the relatively low heat that through the insulating material 16 to the outside.

The rising through the air duct 19 in the memory core 14 Air, on the other hand, is heated much more and passes through the upper air duct 19 'in the insulating material 16 via the hot air outlet side 37 in the upper, roof-like warm air collecting room 20, where the warm air collects (Figures 6, 7).

If based on the appropriate setting on the control button 55 and If there is a need for heat in the room temperature, the bimetal alarm works 22 with its end 62 (Figures 2 to 5) on the rear projecting Area 17 'of the valve plate 17 and presses it here below, which makes it stand out on the front and the warm air outlet openings 18 in the front inclined wall 21 'accordingly more or less open. The collected in the warm air collecting space 20 Warm air can now be combined with that from the convection shafts 39 warm air coming through the warm air outlet openings 12 in the inclined wall 41 above the outer front wall 28 (figures 1, 6) flow into the room to be heated.

The core of the invention is that of the inner rear wall 26 Embossed support body 25 with the bottom wall 27 adjoining it at the bottom leading into a stabilizing and fastening web 29, which serves to lock the lower plate made of insulating material 16 and as lower bracket for the inner front wall 34 (Figure 6). The inside back wall 26 merges directly into the top wall 21, which is due to its roof shape from the heat collection space 20 above the upper plate Insulating material 16 forms.

The roof-like design of the top wall 21 has the advantage that e.g. across from a cuboid dome saves material and labor become. By using the roof ridge 21 '' 'as a tipping edge for the valve plate 17 also becomes the expense of providing one Hinge saved. The punching proves to be particularly advantageous the projections 23 and their bending, as shown in Figure 7a is. This eliminates any effort for the additional attachment a suspension using separate hinges, cams or the like.

It is essential for the invention that 35 first the floor pan 31 is fastened, which has a U-shaped cross section has, with the rear leg is slightly higher and openings 11 for the entry of air into the air duct 32. The floor pan is on the side completed by the set inner side walls 33, which are screwed to the bottom pan 31 below.

The inner side walls 33 are inter alia via the mounting holes 52 with the lateral stabilizing and fastening webs 29 of the Screwed support body 25 and thus fulfill another as inner feet Function. The side walls 33 are thus supported on the floor pan 31 from.

The support body 25 with the inner side walls 33 and the inner front wall 34 forms a separate inner housing, which is in the floor pan 31 stands and to which the outer parts, namely the outer rear wall 38, the outer front wall 28 with inclined wall 41 and outer top wall 42 and the outer side walls 45 are grown. The memory core 14 with the heating elements 15 and the insulating material 16 completely arranged within this inner housing 25, 33, 34.

The number of individual parts as well as the time required to assemble the device all controls in the controller module must be reduced 50 summarized on the mounting plate 51.

The rear wall 38 is over the side cover flanges 47 and one of them mounting flange 63 protruding at right angles (FIG. 4) and Bracket 46 attached to the inner side walls 33.

The storage stones 14 'with the insulating material 16 and the heating elements 15 are after assembly of the support body 25 with the inner side walls 33 and the floor pan 31 from the front into the interior of the Carried body 25 introduced. Only then is the inside front wall from the front 34 inserted behind the web 29 below and at the top of the web 29 screwed on using the fastening means 52. After assembly the electrical parts and the valve plate 17 are then attached the outer rear wall 38, the outer side walls 45 and the Outer front wall 28 with inclined wall 41 and top wall 42.

LIST OF REFERENCE NUMBERS

11

Air inlet opening (s)

12

Hot air outlet opening (s)

13

casing

14

memory core

14 '

memory stones

15

heating element

16

insulating material

17

valve plate

17 '

above area

18

Warmluftauslaßöffnung

19

Air duct

19 '

Luftführungskarial

20

Warm air collection space

21

upper wall

21 '

scaling wall

21 "

scaling wall

21 " '

ridge of the roof

22

Actuators (bimetal)

23

head Start

23 '

punching

24

perforation

25

supporting body

26

Inner rear wall

27

bottom wall

28

Outside front wall

29

Stabilizing and fastening bridge

30

Air passage opening

30 '

Through opening

31

floor pan

32

air duct

33

Interior sidewall

34

Interior front wall

35

rail

36

Air inlet gap

37

Warm air outlet side

38

An exterior rear wall

39

convection shaft

40

spacer

41

scaling wall

42

Outside deck wall

43

suspension

44

screw

45

Exterior side wall

46

angle

47

cover flange

48

cover flange

49

screw

50

controller module

51

mounting plate

52

mounting holes

53

passage openings

54

mounting holes

55

control knobs

56

support flange

57

neckline

58

cables

59

flange

60

room

61

step

62

The End

63

mounting flange

Claims (26)

1. An electrical storage heater comprising a housing (13) which has cold air inlet openings (11) preferably arranged at the bottom and hot air discharge openings (12) preferably arranged at the top and in which an accumulator core (14) surrounded at the bottom, at the top, and at all sides by insulation material (16), having air guidance passages (19, 19') and consisting of accumulator modules (14'), and an electrical heating element (15) heating said accumulator core (14), are accommodated, wherein above the accumulator core (14) and the insulation material (16) surrounding it a hot air collection space (20) is provided which, at the top, has at least one hot air discharge opening (18) which can be optionally closed or more or less opened by at least one valve flap (17) and which is connected flow-wise to the hot air discharge side (37) of the air guidance passages (19),
   characterized in that
   the upper wall (21) of the hot air collection space (20) consists of two roof-shaped inclined walls (21', 21") running together in a ridged roof (21"'); in that the hot air discharge opening(s) (18) is/are provided in at least the one inclined wall (21'); and in that the valve flap is designed as an at least substantially planar valve plate (17) pivotal about the roof ridge (21"').
2. An electrical storage heater in accordance with claim 1, characterized in that the valve plate (17) extends from the roof incline (21') having the hot air discharge opening(s) (18) beyond the roof ridge (21"') and is there charged by actuating means (22).
3. An electrical storage heater in accordance with any one of the preceding claims, characterized in that, at the roof ridge (21"'), at least one upwardly projecting projection (23) is provided which engages into an opening (24) of the valve plate (17) complementary thereto such that the valve plate (17) can carry out the opening pivotal movement or the closing pivotal movement about the roof ridge (21"').
4. An electrical storage heater in accordance with claim 3, characterized in that two projections (23) and complementary openings (24) to these are provided at a lateral spacing.
5. An electrical storage heater in accordance with claim 3 or claim 4, characterized in that the upper wall (21) consists of sheet metal and the projection or projection(s) are stamped out and bent out of the metal sheet.
6. An electrical storage heater in accordance with any one of the preceding claims, characterized in that the valve plate (17) is prestressed toward the closing position by its own weight.
7. An electrical storage heater in accordance with any one of claims 2 to 6, characterized in that the actuating means consists of a bimetallic arrangement (22).
8. An electrical storage heater in accordance with any one of the preceding claims, characterized in that the roof ridge (21"') extends parallel to the outer rear wall (38) or to the outer front wall (28) of the housing (13).
9. An electrical storage heater in accordance with any one of the preceding claims, characterized in that, in the housing (13) an accumulator core (14) heating element (15) insulating material (16) supporting body (25) is provided which preferably consists of sheet metal and which consists of an inner rear wall (26), a base wall (27) bent forwardly therefrom and an upper wall (21) bent forwardly therefrom, between which and the upwardly arranged insulation material (17) the hot air collection space (20) is provided.
10. An electrical storage heater in accordance with claim 9, characterized in that the upper wall (21) and/or the inner rear wall (26) and/or the base wall (27) has/have at the side and/or at the front stabilization and securing webs (29) bent out at least substantially at right angles.
11. An electrical storage heater in accordance with claim 9 or claim 10, characterized in that air passage openings (30) are provided in the base wall (27) which downwardly lead room air to the air guidance passages (19, 19').
12. An electrical storage heater in accordance with any one of the preceding claims, characterized in that, beneath the supporting body (25), a base pan (31) is provided whose interior is upwardly adjacent to the base wall (27) of the supporting body (25) and represents an air passage (32) which leads the room air entering through room air inlet openings (11) and/or beneath housing walls (18, 38, 45) to the air passage openings (30) in the base wall (27) of the supporting body (25).
13. An electrical storage heater in accordance with claim 12, characterized in that the base pan (31) rests on at least two spaced rail feet (35).
14. An electrical storage heater in accordance with claim 13, characterized in that the rail feet (35) preferably extend perpendicular to the outer front wall (28) or to the outer rear wall (38).
15. An electrical storage heater in accordance with any one of claims 9 to 14, characterized in that the supporting body (25) is forwardly terminated by an inner front wall (34) which can preferably be applied subsequently and which is preferably secured to the front stabilizing and securing webs (29) of the upper wall (21) and of the base wall (27).
16. An electrical storage heater in accordance with claim 15, characterized in that the inner front wall (34) only reaches up to the base wall (27) at the bottom and the base wall (31) is so low at least at the front and preferably also at the back that an air inlet gap (36) is present between its upper side and the base wall (27).
17. An electrical storage heater in accordance with any one of claims 9 to 16, characterized in that an outer front wall (28) or an outer rear wall (38) is respectively provided spaced in front of the inner front wall (34) and/or behind the inner rear wall (26).
18. An electrical storage heater in accordance with claim 17, characterized in that spacers (40) are provided at suitable intervals between the inner rear wall (26) and/or the inner front wall (34), on the one hand, and the outer rear wall (38) and the outer front wall (28), on the other hand.
19. An electrical storage heater in accordance with any one of claims 9 to 18, characterized in that the supporting body (25) is terminated at the side by inner side walls (33) which are preferably secured to . the side stabilization and securing webs (29) of the upper wall (21), of the inner rear wall (26) and of the base wall (27).
20. An electrical storage heater in accordance with claim 19, characterized in that the inner side walls (33) extend down to the base of the base pan (31) and are also secured to this and thus support the supporting body (25) via the base pan (31) at the base, wherein the inner side walls (33) are preferably supported on the end regions of the base of the base pan (31) and are there fixedly connected to the base by suitable securing means.
21. An electrical storage heater in accordance with claim 19 or claim 20, characterized in that outer side walls (45) are applied at a side spacing from the inner side walls (33).
22. An electrical storage heater in accordance with any one of claims 17 to 21, characterized in that the intermediate space between the inner front wall (34) and the outer front wall (28) and/or the inner rear wall (26) and the outer rear wall (38) and/or the inner side wall (33) and the outer side wall (45) forms a convection shaft (39) into which room air enters from the bottom, flows upwardly along the inner rear wall (26) or the inner front wall (34) or the inner side wall (33) respectively and is discharged upwardly from the air discharge openings (12).
23. An electrical storage heater in accordance with any of claims 17 to 22, characterized in that the outer front wall (28) upwardly merges into an inclined wall (41) having the hot air discharge openings (12) and merging into an outer cover wall (42).
24. An electrical storage heater in accordance with claim 23, characterized in that suspension means (43) are provided at the top for the outer cover wall (42) and/or the inclined wall (41) and the outer front wall (28) is secured by screws (44) to the outer side wall (45) at the bottom.
25. An electrical storage heater in accordance with any one of claims 17 to 24, characterized in that the outer front wall (28) and the outer rear wall (38) have side cover flanges (47) which are inwardly directed and cover the intermediate space (39) between the outer front wall (28) and the inner front wall (34) as well as the outer rear wall (38) and the inner rear wall (26).
26. An electrical storage heater in accordance with any one of claims 17 to 25, characterized in that the outer rear wall (38) also has a cover flange (48) at the top which lies above the upper wall (21) of the supporting body (25) and which guides air rising in the rear intermediate space (39) to the hot air discharge openings (12).

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