HU229686B1 - Water heater assembly - Google Patents

Description

WATER HEATING ARRANGEMENT

FIELD OF THE INVENTION The present invention relates to a water heater arrangement for serving a hot water supply point or points for domestic hot water, comprising a gas-fired flow water heater having an inlet cold water and an outgoing hot water line;

Gas-fired water heaters are commonly used in households and other locations with lower demand for hot water. These include flow type types that are triggered by the flow of water caused by the hot water tap opened at the outlet. Overheating of the water in the pipe section between the water heater and the water intake and the slow start of the heat transfer at the beginning of the flow results in only a relatively long time of supply of cold or not warm water to the water intake. it is unpleasant to buy when there is a lot of wasted and inefficient water and time. The devices usually start to run at maximum gas burn power when the water flow starts, which in turn can lead to sudden needle heating after this initial phase, which can also be unpleasant, e.g. re-opening in the next small amount of time, where the user does not count on overheated water.

In addition, gas storage water heaters with a built-in buffer tank are used. The hot water from this buffer tank is placed at the point of receiving water. The tank is heated in a controlled manner, which results in a more even gas burner power utilization. If the size of the buffer tank is small, it does not increase the size of the device significantly, but the hot water runs out quickly. If the buffer tank is large, it will run out later, but the gas energy used for heating may be redundant if no hot water is taken for a long time. This: the disadvantage can be reduced by increasing the thermal insulation, which can lead to an increase in size and cost.

It is also possible to use a buffer tank located outside the device, which does not increase the size of the device, but it is necessary to use a separate circulation pump to achieve the controlled temperature, which is also expensive.

The common disadvantage of the solutions so far is that they do not provide hot water in the event of a gas outage, or are only able to provide significant temporary hot water with a large buffer tank,

Another widespread category of water heaters uses electric heating, and the heat insulated device in the tank is controlled by: temperature standby; The advantage of this is the simple and inexpensive implementation of temperature control. However, it has the disadvantage that it is generally more volatile than a gas-fired gas appliance and consumes significant electrical power.

It is an object of the present invention to provide a solution that eliminates the delay effect even when frequent or small quantities of hot water are received, while requiring a low initial investment with low energy consumption, and operable even in the event of an energy service outage.

The present invention is based on the discovery that the advantages of a gas-fired flow-through water heater are combined with the advantages of a small-scale storage tank electric water heater, and this arrangement achieves optimum operation, waste heat utilization and constant device size.

A further advantage of the arrangement is the elimination of the frequent occurrence of very small amounts of hot water when the gas heater · does not start automatically due to the small amount, and only the cold water flows into the heat storage tank. . In our solution, however, the electric storage water heater constantly heats the water up to the set temperature, that is, even during short breaks. This ensures thermal balance and minimization of tank size.

More generally, the object of the present invention is achieved by a water heater according to the introductory paragraph, wherein the storage water heater is integrated in the gas flowing water heater in a manner that absorbs its useful heat.

The invention will now be illustrated by means of a diagram, wherein

Fig. 1 is a gas-fired flow water heater with a built-in storage electric water heater according to the invention.

Figure 1 shows an arbitrary gas-fired flow-through water heater 1. The gas-fired flow water heater 1 has an inlet cold water line 2 and an outgoing hot water line 3. The latter comprises the electric water heater 4 according to the invention, which is connected in series and has an electrical connection 8 connected to a filament and a temperature regulator for controlling the temperature of the water stored therein and for controlling the heating filament. According to Fig. 1, the electric water heater 4 is installed in the outgoing hot water pipe 3 within the gas flowing water heater 1 itself. This can be advantageous in terms of space utilization. Another advantage is that there is no need to separate or disassemble the hot water pipe. A further advantage is that, when properly designed and disposed, the storage tank of the electric water heater 4 can utilize the heat not otherwise utilized in the gas-fired flow water heater 1. A heat transfer element extending into the combustion chamber 7 of the gas flowing water heater 1 may be used. and preheating the amount of water in the electric water heater 4 by heat transfer, thereby reducing the amount of electric energy used for heating. This heating is controlled, i.e. the temperature regulator 5 maintains the water in the electric water heater 4, i.e. the buffer tank, at a given temperature.

The storage capacity of the electric water heater 4, which acts as a buffer tank, is small enough because it serves essentially to compensate for the temperature delay and overshoot of the gas-fired flow water heater 1. Generally, a volume of less than 2.0 liters is sufficient for this purpose. Use of a 5-15 liter buffer tank. Even at these volumes, the temperature at the water intake can be set at a very uniform temperature, adjustable by the temperature regulator 5 of the electric water heater 4. The electric water heater 4 heats the system even outside the water intake, so a smaller tank is sufficient. This temperature can be chosen to be relatively low and does not prevent the gas supplied by the gas-fired flow-through water heater 1 from reaching some of the time, even hotter water, and reaching the water intake. When the tap is closed at the water intake, the water remaining in the tank 4 of the electric water heater will be at a higher temperature than that set by the temperature regulator 5. In this case, it is not necessary to actuate the electric heating until the water contained in the buffer tank is cooled to the set rods. We can achieve favorable energy use and environmentally friendly operation ·

The arrangement according to the invention can be provided; to be able to receive domestic hot water in the event of a power outage or gas outage. At the same time, the disadvantageous delay of the more economical gas-fired water heating is eliminated, since the water in the electrically heated puffer tank compensates for the slow temperature response and overheating.

Claims (4)

A water heater arrangement comprising a gas-fired overflow water heater (1) having an inlet cold water (2) and an outgoing hot water line (3), a storage electric water heater (4) arranged in series with the outgoing hot water line (3). equipped with a temperature regulator (5), characterized in that the storage electric water heater (4) is integrated into the gas flow water heater (il) in a manner that accumulates its non-bass heat. Arrangement according to claim 1, characterized in that the storage tank of the electric water heater (4) has a volume of less than 20 liters. Arrangement according to claim 2, characterized in that the storage tank of the electric water heater (4) has a volume of 5 to 15 liters. Arrangement according to claim 1, characterized in that the storage electric water heater (4) is integrated in the gas-fired flow water heater (1) with a heat transfer element (8) extending into its combustion chamber (7).