DE9315516U1 - Water heater - Google Patents

Description

2 7. Sap, J993

Joh. Vaillant GmbH u. Co. GM 1203

The invention relates to a water heater with a connection box for electrical cables, in which connection terminals are arranged.

In known water heaters of this type, only one terminal block is arranged in the connection box, which serves to connect the wiring inside the water heater with the connecting wires coming from outside.

The problem with such devices is that the electrical connections have to be made in a relatively complicated way in order to test the device.

The aim of the invention is to avoid these disadvantages and to propose a water heater of the type mentioned at the outset, to which an electrical connection can be quickly established, in particular for testing purposes.

According to the invention, this is achieved in that a through-plated circuit board is arranged in the connection box, which is provided with contact points on one side to which a connection adapter can be connected.

In this way, an electrical connection can be made very easily, especially for testing purposes. All you have to do is plug the connection adapter into the circuit board. This eliminates the need for the previously usual connection of the individual connecting wires, which requires a great deal of effort.

According to a further feature of the invention, it can be provided that the base of the junction box is provided with spring-loaded claws and can be clipped into the junction box from below, with a seal optionally being held in the edge area of the base.

In this way, the circuit board of the junction box is very easily accessible, while very good protection against the ingress of splash water into the junction box is ensured for normal operation.

According to a further feature of the invention, it can be provided that instead of the base, an adapter plug can be inserted into the water heater from below and that the underside of the connection box is freely accessible.

In this way, an electrical connection can be established very easily and quickly for testing purposes.

The invention will now be explained in more detail with reference to the drawing.

Figure 1 shows schematically the arrangement of a connection box in a water heater and

Figure 2 shows a section along the line II-II through the junction box according to Figure 1.

The same reference symbols indicate the same details in all figures.

Figure 1 shows a partial view from below of a water heater.

Close to the wall 2, in a recess 13 of the housing 1 of a domestic water heat exchanger, a box 3 is arranged, in which an electronics forming a control system is contained.

Furthermore, a connection box 4 is arranged in the area of the wall 2, but it is difficult or impossible to access from the sides because a water switch is located close to the wall 2. The door 15 closes off the recess 13 from the outside.

Figure 2 shows the structure of the junction box 4 in greater detail, whereby Figure 2 shows a cross section through the junction box.

The same reference symbols indicate the same details in all figures.

The connection box 4 has an upper part 6 provided with side walls 5 and a base 7 that can be locked to the side walls 5. Connection terminals 8 are arranged inside the connection box 4 and are held on a circuit board 9.

This circuit board 9 is plated through and has contact points 10 on its underside. These can be brought into contact with a connection adapter (not shown). This can be pressed onto the circuit board from below, whereby the spring-loaded hook-like projections 11 on the side walls 5 of the connection box 4 serve to hold the connection adapter in its position pressed against the circuit board 9. The connection adapter can be released again by pressing these projections 11 back accordingly.

After completion of the testing work and removal of the connection adapter, the base 7 can be placed onto the connection box 4 from below. The base 7 has spring-loaded claws 12 that protrude diagonally outwards. These are held by the hook-like projections 11 when the base 7 is placed on top.

Claims (3)

Joh. Vaillant GmbH u. Co. GM 1203 CLAIMS 1. Water heater with a connection box for electrical lines, in which connection terminals are arranged, characterized in that a through-plated circuit board (9) is arranged in the connection box (4), which is provided on one side with contact points (10) to which a connection adapter can be connected. 2. Water heater according to claim 1, characterized in that the base (7) of the connection box (4) is provided with resilient claws (12) and can be clipped into the connection box (4) from below, a seal being held in the edge region of the base (7) if necessary. 3. Water heater according to claim 1 or 2, characterized in that instead of the bottom (7) a
The adapter plug can be inserted into the water heater from below and the underside of the connection box (4) is freely accessible.