DE9104662U1 - Combi boiler - Google Patents

Description

Combi boiler

The invention relates to a combi boiler as a combination of a domestic hot water boiler and a buffer tank, combined in a common component for use in heating systems with two or more heat generators.

With such combi boilers, which can be used for heating systems with two or more heat generators, preferably in the 5-40 KW output range, the problem arises that the various units require complicated and costly controls and valves, which makes the entire system uneconomical to manufacture.

The invention is based on the object of creating a combination of different units with different heat generators without complicated controls and valves at the lowest possible cost.

The problem is solved by the characteristic features of the protection claim.

According to the invention, the advantage is that a combination boiler, consisting of a domestic water boiler and a buffer tank, different units with different heat generators without using complicated

ified controls can be manufactured at low cost.

The drawing shows an example of the object. It shows:

Fig. 1 the combi boiler in longitudinal section.

The combination storage tank 1 shown in the drawing contains a hot water part or domestic water boiler 2 (of approx. 150 liters) suspended in the domestic water part 2a with approx. 300 liters capacity and a buffer storage tank 3 of approx. 500 liters capacity, whereby a heating system with two or more different heat generators is used.

The hot water part or domestic water boiler 2 is suspended in the upper area of a common component 5, with the buffer storage 3 being arranged in the area below this component 5. Both storage parts are separated from each other by an installed perforated partition plate 6.

An exchange of temperatures from one part of the storage tank to the other occurs according to the principle of gravity, whereby cold water sinks to the bottom and warm water rises to the top. This separating plate 6 ensures that circulation pumps cannot swirl the temperature layers that form in the tank. At the same time, gravity can equalize the cold and warm water through the openings in the separating plate 6. This makes it possible to have a high service water temperature of, for example, 60° C and a simultaneous buffer temperature of, for example, 30° C, without any turbulence or mixing.

The service water tank 2 is made of either sheet steel

double enamelled and contains a sacrificial anode or is made of stainless steel. The buffer tank 3 is heated by heat generators that primarily use renewable energy such as wood boilers, solar systems or heat pumps. The energy is either transferred via the built-in heat exchanger 4 or directly to the buffer tank water. The return flow of the heating system is routed via the buffer part 3 and takes the existing energy with it. The now heated water is either routed to the downstream oil/gas boiler or directly to a consumer.

In the oil/gas boiler, the actual value is compared with the target temperature specified by the control system.

If the temperature is sufficient, the boiler stays off. If it is 5°C short, the boiler heats up to 5°C.

If there is no heat in the buffer, the boiler runs normally as if there was no combi storage tank installed in the return line. If no more heat is used for heating, e.g. because the rooms have reached the target temperature, the temperature in the buffer tank rises. Gravity creates buoyancy. The heat rises through the openings into the hot water section and heats up domestic water.

If warm water is now drawn, cold water settles on the bottom of boiler 2. Due to heat conduction, the water underneath above the separating plate 5 also becomes cold and falls by gravity through the perforated plate into the buffer part (3). At the same time, warm buffer water rises upwards through the perforated plate.

For example, in summer the entire buffer content can be used to heat water.

Such a design allows the generation and distribution of heating and domestic water without the use of complicated valve controls.

The energy suppliers or heat generators 4 are connected differently to this distribution system with buffer effect
connectable.

Claims (1)

1 _ Claim for protection Combi boiler with a domestic water boiler and a buffer boiler, which are combined in a common component, for use in heating systems with two or more different heat generators, characterized in that the domestic water boiler (2) is suspended in the upper area of the common component (5) and the buffer storage tank (3) is arranged in the area below, with both storage parts being separated from one another by a perforated partition plate (6).