DE7103160U - Electric water heater, in particular boiling water device - Google Patents

Description

Electric hot water heater, in particular boiling water device

The innovation relates to an electric hot water boiler, in particular boiling water device, with a cold water inlet pipe and a steam discharge pipe having water container and with one arranged on the vapor discharge pipe Steam passage reacting temperature switch.

When the water in the water tank has come to a boil, the developed steam is released through the steam outlet pipe derived and serves to switch off the heating of the device at the boiling point as a switching criterion for the one at the Daepfableitrohr arranged temperature switch. The water that has been brought to the boil can then be taken from the device.

To switch the heating on again, it is a prerequisite that the steam discharge pipe is at least in the area of the temperature switch has dropped to a temperature that no longer triggers the shutdown of the heating by the temperature switch. The natural Cooling of the steam discharge pipe through heat radiation losses and convection cooling takes place so slowly that one takes place in relatively short periods of time Use of the device is not possible; as a result, the practical value of known devices of this type is significantly impaired.

The task of the innovation is to provide an electric hot water heater, in particular a boiling water device with a temperature switch arranged on its steam discharge pipe that is immediately ready for use again after it has heated up to the boiling point.

According to the innovation, this object is achieved in that the cold

710316030.9.71 - 2 -

VPA 71/9003

water inlet pipe and the steam discharge pipe outside the water tank in the area of the temperature switch conductively with each other vtsruuüucii siüü. nXi slCft äiiöiien iiää cold water inlet—

pipe and the vapor discharge pipe, if they are routed through metallic wall parts of the water tank - e.g. its bottom are already in a thermally conductive connection to a certain extent. However, it has been shown that this type of connection can not noticeably contribute to the solution of the object according to the innovation. Rather, it is crucial that the cold water inlet pipe and the steam discharge pipe are connected in the area of the temperature switch.

The cold water inlet pipe has its temperature due to its connection with the water network and maintains this even during the heating process, se that after the shutdown of the Heating the steam discharge pipe is rapidly cooled via the thermally conductive connection arranged in the area of the temperature switch, especially if cold water is fed into the water tank through the cold water inlet pipe before the device is restarted.

The development of steam in a hot water heater, especially a boiling water device in the cooker '* - ¹ '"+ · is so strong that the cooling of the steam discharge pipe caused by the cL *, heat-conducting connection with the cold water inlet pipe causes the temperature switch to react to the passage of steam at the boiling point In a known design, on the other hand, the temperature switch is arranged on a thermal bridge connecting the steam discharge pipe and the water inlet pipe This is why switching off the heating at the boiling point is much less reliable with this known design than with the new

VPA 71/9003

where the temperature switch is located on the steam discharge pipe and the steam temperature is the sole switching criterion at the peak *

To connect the cold water inlet pipe and the steam discharge pipe, a bracket made of appropriately heat-conducting Material used. It is advantageously possible to accommodate further switching and control elements as well as components of the water heater on the tab · A special one simple connection of the cold water inlet pipe with the steam discharge pipe results when they touch. In both In some cases, the thermally conductive connection can be significantly improved in that the cold water inlet pipe and the steam discharge pipe are cohesive with one another and / or with the tab e.g. connected by soldering or welding

Based on the drawing, exemplary embodiments of the Neuereng described »It show in a schematic representation

Fig. I the lower part of a boiling water device in which

Steam discharge pipe and cold water inlet pipe through one Tab are connected,

Fig. 2 shows the lower part of a boiling water device in which

the steam discharge pipe and the cold water inlet pipe touch each other.

A steam discharge pipe 3 and is through the bottom 1 of the water container 2 of a boiling water device (not shown in detail) a cold water inlet pipe 4 out. At the steam discharge pipe 3 is a temperature switch 5 that reacts to the passage of steam and is looped into the heating circuit of the boiling water device is arranged. In the area of the temperature switch 5 is the steam discharge pipe 3 and the cold water inlet pipe 4 through a tab 6 made of a material that conducts heat well. Of the The distance of the tab 6 from the floor 1 should be greater and that of the temperature

710316030.9.71 .4-

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II 1 II «· * * ·
• ι * as the VPA 71/9003 ϊ -A- diameter temperature switch from the tab 6
of the cold water inlet pipe 4. smaller

Dei in Fig. 2 Dargestsllten boiling water device is a steam discharge pipe 9 and a cold water inlet pipe 10 so guided through the bottom 7 of the water container 8 that they touch. The temperature regulator 5 is arranged on a pipe section 11 of the steam discharge pipe 9 that is bent away from the cold water inlet pipe 10.

In both embodiments, it is advantageous to connect the steam discharge pipe 3, 9 and the cold water inlet pipe 4, IC · · Indian and / or with the tab 6 materially, for example by welding or welding. The tab can also look like this _; ; ·. It should be that it leaves the Daffipf drainage or cold water inlet pipes lying next to one another and touching one another, for example.

The boiling water device according to the innovation is characterized by a reliable reaction of the temperature switch to the passage of steam and because the temperature switch can be switched on again at short intervals.

4 claims for protection
2 figures

7103180 3 o.e. 71

Claims (4)

VPA 71/9003 protection claims 1. Electric hot water heater, especially boiling water device, with a cold water inlet pipe and a steam discharge pipe having water tank and with a steam discharge pipe arranged temperature switch that reacts to the passage of steam, characterized in that that the cold water inlet pipe (4, 10) and the steam discharge pipe (3, 9) outside the water tank (2, 8) in the area of the temperature switch (5) in a thermally conductive manner with one another are connected. 2. hot water heater according to claim i, characterized in that that there? Steam discharge pipe (3) and the cold water inlet pipe (4) are connected by a tab (6). 3. hot water heater according to claim 1 or 2, characterized in that that the steam discharge pipe (9) and the cold water inlet pipe (10) touch each other. 4. Hot water heater according to one of claims 1 to 3, characterized in that the steam discharge pipe (3, 9) and the cold water inlet rbhr (4, 10) are connected to one another and / or to the tab (6) in a materially bonded manner, e.g. by soldering or welding are.