DE29610287U1 - Inner container for hot water storage - Google Patents

Description

Inner tank for hot water storage

Field of use:

Inner container for above and under counter versions of electric hot water tanks for household, office, etc.

Characteristics of the state of the art:

In practice, the different designs of a hot water tank for above and below the counter are usually achieved by using an identically constructed inner tank with different heating designs.

In the over-counter version, the heating is arranged from "below" in the tank, and in the under-counter version, a completely different heating is arranged from "above" in the tank. This leads to significantly different properties of the overall product in terms of hot water yield; control behavior; insulation behavior, etc., whereby these differences are accepted as a compromise for economic considerations or an improvement in these properties is to be achieved with considerable material expenditure. Very complex solutions for the design of the cold water inlet into the tank in different designs are known. There are also very complex technical solutions to improve the response sensitivity and to match the insulation capacity in the under-counter version to that of the over-counter version.

Aim of the invention:

The invention aims to create an inner container that eliminates the above-mentioned deficiencies and is significantly more cost-effective to produce.

Statement of the nature of the invention:

The invention is based on the object of creating an inner container made of plastic, which is designed in such a way that an over-table and an under-table version can be produced from two plastic parts by means of a suitable welding process, which do not have different properties.

According to the invention, this object is achieved in that a plastic part has an inlet and outlet nozzle as well as an open overflow channel and a special inflow area at the top and bottom. A second plastic part has a cover for the open overflow channel of the first plastic part in such a way that the cover also remains at 180°

Rotation of the parts relative to each other is effective. Furthermore, the white plastic parts have a congruent inflow area at the top and bottom and a congruent "chimney formation" in the middle area. The front plastic part also has a mounting area with fastening elements for the heater and the thermostat sensor.

The different designs are achieved by joining (welding) both parts by rotating them relative to each other.

Example:

The illustrations show in detail

Fig.1 Side view of the inner container in over-table design

Fig.2 Side view of the inner container in under-counter version

Fig.3 Full section A2-A2 of an over-table container through the welding plane

Fig.4 Full section A1-A1 of an under-counter container through the welding plane

Fig.5 External view of the front plastic part with heating flange opening

Fig.6 Full section A3-A3 through the welding plane in the direction of the flange opening

Fig.7 Front view of the inner container in over-table design

Fig.8 Full section B1-B1 across the heating flange area of the inner container
with heating

Fig.9 Longitudinal section C2-C2 through the inlet nozzle Fig. 10 Longitudinal section C1-C1 through the outlet nozzle

Fig. 1 shows the side view of the inner container (i) according to the invention in an over-table design consisting of the plastic parts (2) and (3) welded together. In the welding plane (4), the overflow channel (5) and (6) are tightly closed by the plastic parts. The heating flange area (7) and the outlet nozzle (8a) with a ring assembly element (9) can be seen. The overflow channel (5) has a significant enlargement (6) in the upper area of the container (1).

In Fig.2, the container according to the invention is shown in an under-table design. It can be clearly seen that the plastic parts are connected (welded) to the plastic parts, in contrast to the over-table design in Fig.1, rotated by 180°.

In Fig.3, the full section A2-A2 through the SfcTWSttJebeWe(47) shows the " " inventive design of the plastic part (2) with the inlet nozzle (8b), the outlet nozzle (8a), the overflow channel (5) including the extension (6), the inflow area (10a) and (10b) with individual webs (13) and (14) arranged offset from one another, as well as the chimney (11), which is formed from the chimney webs (12a) and (12b) and the stiffening domes (18). Also shown are assembly aids (15a) and (15b) for the thermostat sensor assembly as well as clearances (16a) and (16b) for the heating flange and stiffening ribs (17). The inflow areas (10a; 10b), the assembly aids (15a; 15b) as well as the Chimney webs (12a; 12b) including the stiffening domes (18) are arranged rotationally symmetrically to the center point^ 9).

In Fig.4, the full section A1-A1 through the welding plane (4) of the inner container in under-table design shows all structural features of the plastic part (2) rotated by 180° to the center point (19).

In Fig.5, the plastic part (3) is shown from the outside with the heating flange opening (20), the thermostat sensor opening (21), the mounting segments (22a; 22b) and the closure edge (23a; 23b). The closure edge is designed so that the overflow channel (5; 6) is sealed (welded) in both the over-table and under-table versions. In the over-table version, the closure edge (23b) is welded to the overflow channel (5) and in the under-table version, the closure edge (23a) is welded to the overflow channel (5).

In Fig.6, the full section A3-A3 through the welding plane (4) shows the structural design of the plastic part (3). It is designed to be congruent with the plastic part (3) taking into account a 180° rotation and has a right-hand closing edge (23b) and a left-hand closing edge (23a), which tightly closes the overflow channel (5;6) of the plastic part (2) in both the over-table and under-table versions. The webs (13;14); (24;25) as well as the chimney webs (12a;12b) and the stiffening domes (18) are tightly connected (welded) in the welding plane (4) to the corresponding counterparts of the plastic part (2).

Fig.7 shows the front view of an inner container in over-counter design with temperature fuse (26); heater (27) and thermostat sensor opening (21).

The full section B1-B1 in Fig.8 shows the basic arrangement of the heater (27), the temperature fuse (26) and the thermostat sensor (28). The overflow channel (5) with the cross-sectional extension (6) and the closure edge (23a; 23b) can also be clearly seen. The heating flange (27) is joined to the inner container without screws by means of rear-engaging ring segments (22) and bayonet closure part (30) as well as an O-ring (31) in conjunction with a stop (29).

The longitudinal section C2-C2 through the inlet nozzle (8ci) shows the water-side connection via the inlet opening (36) and inflow area (10a) with inlet web (13). The inlet nozzle is molded onto the plastic part (2) in one piece and has an O-ring sealing surface (35b) and a corner rib (34a).

Fig. 10 shows in longitudinal section C1-C1 the water-side outlet connection (33) from the overflow channel (5) of the inner container to the outlet nozzle (8a) with the outlet cross-section (32), an O-ring sealing surface (35b) and a corner rib (34b)

List of reference symbols used

1 inner container

2 plastic part

3 Plastic part

4 Welding level

5 overflow channels

6 Overflow channel extension

7 Heating flange area 8a Outlet nozzle

8b Inlet nozzle 9 Ring mounting element 10a Inflow area 10b Inflow area 11 Chimney

12a Chimney bridge 12b Chimney bridge

13 Inlet bridge

14 Inlet bridge 15a Assembly aid 15b Assembly aid 16a Clearance 16b Clearance

17 stiffening ribs

18 Stiffening dome

19 Center of symmetry

20 Heating flange opening

21 Thermostat sensor opening

22 rear-grip ring segment 23a right locking edge 23b left locking edge

24 left boundary bridge

25 right boundary bridge

26 Temperature fuse

27 Heating

28 thermostat sensors

29 stop

30 Bayonet lock part 31· O-ring

32 Outlet cross-section

33 Outlet connection 34a Corner rib 34b Corner rib 35a O-ring sealing surface 35b O-ring sealing surface 36 Inlet connection

Claims (6)

Claim ft *· * ft · · · Inner container made of plastic parts joined together for electric hot water tanks in above and below counter designs, characterized in that one plastic part (2) has a molded inlet nozzle (8b) and a molded outlet nozzle (8a) as well as an overflow channel (5) molded on one side and the second plastic part (3) has a heating flange area (7) as well as a right-hand closing edge (23a) and a left-hand closing edge (23b) and that both plastic parts have chimney webs (12a; 12b) that are rotationally symmetrical about a common center point (19) in the longitudinal direction and that both plastic parts have a congruent lower inflow area (10a) and upper inflow area (10b) with congruent inflow webs (13) and (14) that are arranged offset from one another. 2.) Inner container made of plastic parts joined together for electric hot water tanks in above- and under-counter versions according to claim 1, characterized in that the overflow channel (5) in the upper container part has an extension (6). 3.) Inner container made of plastic parts joined together for electric hot water storage tanks in above- and under-counter versions according to claim 1, characterized in that a thermostat sensor opening (21) is arranged in the heating flange area (7). 4.) Inner container made of plastic parts joined together for electric hot water tanks in above and below counter design according to claim 1 and 2, characterized in that in the plastic part (2) two assembly aids (15a) and (15b) are arranged rotationally symmetrically to the center point (19) and congruently to the thermostat sensor opening (21). 5·) Inner container made of plastic parts joined together for electric hot water tanks in above- and below-counter design according to claim 1, characterized in that the chimney webs (12a) and (12b) and inlet webs (13) and (14) in the inlet area (10a) and (10b) are fully formed up to the welding plane (4). 6.) Inner container made of plastic parts joined together for electric hot water tanks in above- and under-counter versions according to claim 1, characterized in that the inlet and outlet nozzles (8a) and (8b) each have a ring mounting element (9) and a corner rib (34a) and (34b) and an O-ring sealing surface (35a) and (35b). Inner container made of plastic parts joined together for electric hot water tanks in above- and below-counter design according to claims 1 and 5, characterized in that the chimney webs (12a) and (12b) are provided with congruent stiffening domes (18) which are formed up to the welding plane (4). Inner container made of plastic parts joined together for electric hot water tanks in above- and below-counter design according to claim 1, characterized in that stiffening ribs (17) are arranged in the container Inner container made of plastic parts joined together for electric hot water tanks in above- and under-counter versions according to claim 1, characterized in that the plastic part (3) has rear-grip back segments (22).