CN100554808C - water heater - Google Patents

Abstract

The invention relates to a water heater (W) having a heating module (H) and at least one tubular heating body (K1, K2) fixed in position in the heating module (H), which is passed through at least one connection end (6) In the heating module (H) at least one channel (D) containing the sealing ring extends outwards and is grounded with a grounding and fixing plate (E), which positions the connection terminal (6) to the heating module (H), the heating module ( H) The outer sealing ring ( 17 ) is inserted into the channel (D) and fixed in the channel indirectly or directly with the pressure plate (E).

Description

water heater

technical field

The invention relates to a water heater.

Background technique

In the water heater disclosed in DE 1013060 A a sealing ring is placed in the end of the channel which is located inside the heating module. On the outer end of the heating body at the connection end guided by the sealing ring and the channel there are clamped grounding and fixing pressure plates. The pressure plate is supported on the outside of the heating module and engages in a groove formed on the heating module on the channel side. The sealing ring insulates the water in this area which may also be hot in some cases. The heating body and its connection end with the subsequently inclined pressure plate can be moved outwards and out of its desired position. The sealing ring may be gradually pushed out of its place by the loose heating body. Replacement of the seal ring requires removal of the heating block.

In the water heater disclosed in DE 3626955A, a large-area bulkhead made of elastic material is provided in the channel region of the heating body-connection end on the inner side of the heating module, which is used for operating the switch and is shaped In the annular sealing element at the connection end of the heating body. This annular sealing element is placed in the inner end of the channel. In produced and sold water heaters, a grounding and fixing pressure plate is fastened on the outside of at least one connection, which bears on the heating module. This connection can move outwards on the heating body and lose its intended position. The concept of a sealing ring formed in the separator is complex and expensive.

Contents of the invention

The object of the present invention is to provide a water heater of the type mentioned at the outset, which can be produced cost-effectively and to which each seal can be easily mounted and secured securely. In addition, a reliable positional fixation of the heating body can be achieved with a tool of simple design.

The above-mentioned object is achieved by a water heater having a heating module and at least one tubular heating body fixed in position in the heating module, the tubular heating body being passed with at least one connection end through at least one sealing ring in the heating module. A channel extends outwards and is grounded with a grounding and fixing platen, characterized in that the outer sealing ring of the heating module is arranged in the outer end of the channel and is fixed with the grounding and fixing platen.

The seal on the outside of the heating module arranged in the channel is protected from water and can be installed and replaced comfortably. The pressure plate indirectly or directly fixes the sealing ring in the sealing position. The possibility of the tubular heating body leaving its intended position is very small.

During operation, the tubular heating body can be fixed in a precise position. At this time, the tubular heating body has a bend, which is pressed against a stop in the heating module, so that the tubular heating body can no longer turn outwards At the same time, the pressure plate on the connection end bears on the outside of the heating module and prevents the connection end from moving inwards. The interaction between the tubular heating body with channels and pressure plates and its shape with stops surrounding the heating module body results in a permanent positional fixation of the tubular heating body in the heating module and a simple installation .

In a further preferred embodiment, the tubular heating element is primarily fixed in position by means of a bearing of the pressure plate on the heating module which acts in two directions, in order to prevent it from moving outwards or inwards, wherein the pressure plate additionally also undertakes The task of fixing the seal.

In another suitable embodiment, the tubular heating element is also prevented from rotating in the channel when it is fastened in the channel with two connection ends. The outlay for laying wires for the grounding of both connections is also minimal, in which case the connections are secured in place by a common pressure plate.

In an embodiment with at least two tubular heating elements, the outlay for laying wires for grounding can be further reduced when the pressure plates arranged at all connection ends are either electrically conductively connected to each other or combined into one multiple laminate. Only one ground wire is required.

It is cost-effective for the press plate or multi-layer press plate to be a sheet metal stamped and bent part with fastening brackets and at least one contact lug.

Since the sealing ring is freed from the influence of water and is additionally fixed by the pressure plate, a simple and cost-effective O-ring is sufficient for the required sealing function.

It is suitable that the sealing ring is inserted into an outwardly opening expansion groove of a channel, which facilitates the installation of the sealing ring, and an annular intermediate piece is arranged between the pressure plate and the sealing ring, which is inserted from the outside and The sealing ring is fixed and supported by the pressure plate.

In order to keep the number of individual parts as low as possible and to simplify the installation, it is suitable that the sealing ring and/or the two intermediate pieces of the sealing ring for fixing the two connection ends of the tubular heating body form a figure-of-eight one-piece construction . This structure can be a simple and cost-effective injection molded part made of an elastomer or plastic.

When the intermediate piece is designed with an annular groove for the channel nozzle and a pressure bracket for the annular groove, the intermediate piece can be positioned exactly in the installation position and the sealing ring is fixed neatly and also outwardly Hidden.

Description of drawings

Embodiments of the object of the invention are described with the aid of the figures. in:

Figure 1 is a perspective view of a heating module of a water heater before installation of the tubular heating body,

Figure 2 is a partial perspective view of a heating module with installed, fixed and sealed tubular heating elements,

Figure 3 is a cross-sectional view of the implementation area of the connection end of a tubular heating body in the heating module, and

Fig. 4 is a detailed sectional view of another embodiment.

Detailed ways

A water heater W shown in FIGS. 1 and 2 , in particular a so-called shower water heater (with an appliance cover removed for clarity) has a heating module H which, in the illustrated embodiment It consists of two plastic die-casting parts 1,2. A cavity 3 for the water to be heated is defined between the two plastic injection moldings. The water heater can also be part of a so-called small storage, a continuous heater or a dishwasher, in which case the heating module can then be modified accordingly.

In the embodiment of the heating module H shown in FIGS. 1 and 2 , at least one tubular heating body K1 , K2 is installed in a desired position in the cavity 3 and leads, for example, through its channel D to the outside. The connecting end 6 to fix the position. The channel D is formed on the shaped part 1 of the heating module H, for example as a pipe connection 11 . In FIGS. 1 and 2, two pairs of channels D are respectively provided for the connection ends 6 of the two tubular heating bodies K1, K2. It is also possible to have more than two pairs or only one pair of channels if necessary.

In the installed position of each tubular heating body K1 , K2 ( FIG. 2 ), the connection terminal 6 extends outward through the channel D until a housing 4 and a connection contact 5 are exposed. At each connection end, to be precise, a grounding and fixing pressure plate E is clamped on the shell 4, and it has an elastic fixing clip 8 as a boundary of an inner opening 7 to be fixed in a shape fit connection and a force transmission connection. Each pressure plate E is pushed onto the housing 4 until it fixes the position of the connection end 6 in the channel D and is supported on the nozzle of the pipe connection 11 , for example via an intermediate part 16 (for example a plastic molded part).

In FIG. 2, two pressure plates E on the connection end 6 of a tubular heating body K1, K2 are electrically conductively connected to each other, preferably via a connecting strip 10 into a single-piece multi-layer pressure plate ES (for example, a plate punching Bending piece), which has at least one contact piece 9. The multilayer laminate ES is designed here in such a way that it can accommodate different height positions between two pipe connection pairs 11 . In this case a single contact lug 9 is sufficient for grounding. Each intermediate piece 16 may be a one-piece ring. However, it is expedient to combine the two intermediate parts 16 of a tubular heating module K1 , K2 into an eight-shaped one-piece structure.

FIG. 3 illustrates the fixed position of the tubular heating body K1 in the heating module H in the embodiment of FIGS. 1 and 2 . In the tubular heating module K1 , the connecting end 6 is connected to the extended area of the tubular heating body in the cavity 3 via a bend 13 . For positional fixation, at least one stop 12, for example a transverse rib, is formed in the cavity 3, preferably close to the channel D, which engages in the bend of the bend 13 when the tubular heating element is in its intended position. Each channel D has an outwardly open extension groove 14 into which a sealing ring 17 is inserted from the outside and which is secured by means of an intermediate piece 16 on which the pressure plate E is supported. In another embodiment, not shown, the intermediate part 16 can be omitted, so that the pressure plate E acts directly and securely on the sealing ring 17 .

In the embodiment shown in FIG. 3 , two sealing rings 17 , for example O-rings, are inserted into the two expansion grooves 14 of the channel D. As shown in FIG. The expansion slot 14 has a nozzle 15 (FIG. 1) defining a figure-of-eight shape. The intermediate piece 16 of the two connection ends 6 is assembled in a single-part structure, which is eight-shaped and rests on the nozzle 15 with two annular grooves 18 cutting each other. The pressure support 19 is shaped as the inner boundary of the intersecting annular groove 18 and can act on the sealing ring 17 from above, or it can be at a distance opposite it (as shown).

In another variant, two separate middle pieces 16 can be provided. Alternatively, two sealing rings 17 or O-rings can be connected to each other to form a one-piece structure. In this case, the structure of the nozzle 15 in the middle area must be omitted.

The pressure plate E on the two connection ends 6 presses against the middle part 16 from above and keeps it in contact with the nozzle 15 . The intermediate piece 16 holds a sealing ring 17 . Through the cooperation between the channels D, the stoppers 12 and the pressure plate E externally supported on the heating module H, the tubular heating body K1 is secured in position and prevented from moving in all directions.

In the embodiment of FIG. 4 , the pressure plate E on a shoulder 20 of the heating module H in the region of the nozzle of the channel D is positively connected and force-transmitting along and against the extraction or insertion direction of the connection end 6 connection ground is fixed. By means of the jaw engagement between the pressure plate E and the connecting end 6 of the tubular heating body K1 and the cooperation of the channels D, the tubular heating body K1 is held in place in all directions and positioned exactly. For example, the fastening shoulder 20 has snap-in recesses 21, for example an annular groove, in at least two positions spaced apart from one another, into which the clamping lugs 22 of the pressure plate E are suitably hooked under preload. Because the pressing plate E (here may also relate to a multilayer pressing plate ES as shown in Figure 3.) is positively locked in at least two mutually spaced positions relevant to the channel, so the pressing plate E cannot be removed from the One side is taken out, and the connection end 6 can move outward from the channel D at this time.

Claims (15)

1. water heater (W), it has the tubulose calandria (K1 of a heating module (H) and at least one fixed-site in heating module (H), K2), described tubulose calandria stretches out by a passage (D) that contains a sealing ring in heating module (H) at least with at least one link (6) and with ground connection and fixation clip (E) ground connection, it is characterized in that the sealing ring (17) in the outside of heating module (H) is disposed in the outer end of passage (D) and is fixing with ground connection and fixation clip (E).

2. by the described water heater of claim 1, it is characterized in that, at the inner tubulose calandria (K1 of heating module (H), K2) has a sweep (13), this sweep is at heating module (H) existing block of inner close fitting (12), the ground connection and the fixation clip (E) in heating module (H) outside are supported in the direction towards passage (D) like this, and the tubulose calandria is by passage (D), block (12) and ground connection and fixation clip (E) fixed-site.

3. by the described water heater of claim 2, it is characterized in that described block is near passage (D).

4. by the described water heater of claim 1, it is characterized in that, ground connection and fixation clip (E) along with against the removing direction of heating module (H) at least form fit be bearing on the heating module (H) with being connected, and tubulose calandria (K1) is fixed the position on all directions by passage (D) and ground connection and fixation clip (E).

5. by the described water heater of claim 4, it is characterized in that, ground connection is connected with fixation clip (E) form fit on the position of at least two space distances one of interlock heating module (H) fixing convex shoulder (20).

6. by any described water heater in the claim 1 to 5, it is characterized in that (K1 K2) has two respectively by the link (6) of a passage (D) to the tubulose calandria, and they come fixed-site with common ground connection and fixation clip (E).

7. by any described water heater in the claim 1 to 5, it is characterized in that, in heating module (H), be provided with at least two tubulose calandria (K1 that have link adjacent one another are (6), K2), and the ground connection and the fixation clip (E) that are arranged on the link (6) be connected to each other or be merged into a multilayer pressing plate (ES) conductively.

8. by any described water heater in the claim 1 to 5, it is characterized in that ground connection and fixation clip (E) are plate sheet metal bending parts that has fixed chuck (8) and at least one contact strip (9).

9. by the described water heater of claim 7, it is characterized in that multilayer pressing plate (ES) is a plate sheet metal bending part that has fixed chuck (8) and at least one contact strip (9).

10. by the described water heater of claim 1, it is characterized in that sealing ring (17) is an O shape ring.

11. by the described water heater of claim 1, it is characterized in that, sealing ring (17) is inserted in the outwardly open expansion slot (14) of passage (D), and has placed the middleware (16) of an annular between sealing ring (17) and ground connection and fixation clip (E).

12., it is characterized in that (K1, the sealing ring (17) of two links (6) K2) and/or two middlewares (16) form the single structure of 8 fonts to the tubulose calandria by the described water heater of claim 11.

13., it is characterized in that the mouth of pipe (15) of passage (D) is annular, and middleware (16) has the support of a bottom side by the described water heater of claim 11.

14. by the described water heater of claim 13, it is characterized in that described support has a cannelure (18) and pressure arm (19) that is used for sealing ring (17) that is used for the mouth of pipe (15), described pressure arm is as the inner boundary of cannelure (18).

15., it is characterized in that described water heater is a shower heater by the described water heater of claim 1.

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