DE202007018732U1 - Heating and / or water heating system - Google Patents

Abstract

Heating and / or hot water preparation system, consisting of a heater (1) with a burner unit (2), at least one connected heating circuit (3) to a heat consumer, a connected thereto via a heat exchanger (4) hot water circuit (5), wherein a valve is provided for switching between heating and hot water preparation operation, a further heat source via supply and return lines (6, 7) or a particular solar heated buffer memory (8), and a front of the burner unit (2) in the return line (9) arranged pump (10), characterized in that in the return line (9) to the burner unit (2) a two-three-way mixing valve (13) is arranged to allow a mixed, unmixed or throttled heating operation and / or hot water preparation operation bypassing or at least Partial inclusion of the other heat source or the buffer memory (8) perform that the two-Dre i-way mixing valve (13) with its four connections to the return line from the heating circuit (3) leading to the further heat source or in the buffer memory (8) return line (7) and from the heat exchanger (4) and the burner unit (2) leading ...

Description

The The invention relates to a heating and / or water heating system according to the preamble of the protection claim 1.

Generic heating and / or water heating systems usually consist of a heater with a burner unit, at least one connected thereto Heating circuit to a heat consumer and one about it a heat exchanger connected hot water circuit.

at this so-called combi heaters takes place the hot water preparation mostly in the direct flow principle. there is in the so-called primary Heat exchanger through the burner unit, the water in the primary circuit, ie the heating water, heated. In the case of a drinking hot water tap, a pump promotes the heated heating water to the so-called secondary Heat exchanger. There is the energy in the flow through the heat exchanger in countercurrent to the drinking water.

there is a changeover valve between heating and hot water preparation operation intended. A pump is located between the changeover valve and the burner unit in the return line. Each about Supply and return lines can another heat source, for example, a district heating transfer station, or a particular solar heated buffer storage in the system to be involved. Such solar heated buffer storage serve for preheating of the heating water. Thus, preheated drinking water reaches temperatures of up to 90 ° C drinking water side to the secondary heat exchanger. These relatively high temperatures can be applied to components of the system possibly cause problems. Therefore, a temperature limit must be switched in advance.

Becomes in known heating and / or water heating systems drinking water as a heat storage medium used, so must periodically for a thermal Disinfection should be taken to ensure a possible nucleation prevention.

Of the Innovation is therefore the task underlying the integration of further, especially regenerative heat sources to simplify in a heating and / or water heating system and to optimize the combination with fossil-fired heaters.

Innovation is this solved with the features of the protection claim 1. Advantageous developments are the dependent claims refer to.

The Heating and / or water heating system is characterized in that that in the return line a two-three-way mixing valve is arranged to the burner unit, so that a mixed, unmixed or throttled heating operation and / or water heating operation bypassing or at least Partial inclusion of the other heat source or the buffer memory perform. The two-way mixing valve with its four connections stands with the return line from the heating circuit leading to the further heat source or in the buffer memory Return line as well as from the heat exchanger opening out and leading to the burner unit Return line in connection. Between the two-way mixing valve and the burner unit ends a flow line from the further heat source or the buffer memory one.

The Two-way mixing valve is a combination of reversal and Throttle valve. It is about a well-known stepper motor signal is driven to the control speed and to comply with the required control accuracy.

At the Two-way mixing valve, the release of the mass flow over the another heat source or through the buffer when the temperature at the outlet of the Heat exchanger and / or in the return line from the heating circuit below the flow temperature of the other heat source or the temperature drops in the upper part of the buffer tank.

Just like that becomes the further heat source or the buffer with at least a partial flow as a bypass flows through and the two-three-way mixing valve opens for at least a partial flow to another heat source or to the buffer when the system is in heating mode and the temperature at the outlet of the heat exchanger and / or in the Return line from the heating circuit below the flow temperature of the other heat source or below the temperature in the upper part of the buffer tank falls.

Farther becomes the further heat source or the buffer only as a bypass with at least a partial flow flows through and it opens the two-way mixing valve for at least a partial flow to the other heat source or to the buffer tank when the system is in water heating mode and the temperature in the return line at the inlet in the burner unit below the temperature at the outlet of the heat exchanger, optionally considering a predetermined switching hysteresis falls.

The Two-way mixing valve serves as a mixing valve when the flow temperature the further heat source or the temperature in the buffer memory is higher than a predefinable setpoint is. Furthermore the two-three-way mixing valve has an extended range of rotation the valve plug, to act as a throttle valve. This throttling effect is especially for the hot water preparation operation relevant, since the modulation of the pump capacity on its own is relatively limited downwards.

With The innovation is a simple heating and / or water heating system to disposal, with the integration of other, especially regenerative heat sources simplified into a heating and / or water heating system and optimized the combination with fossil fired heaters becomes. Especially in connection with a solar heated buffer tank the hot water preparation is optimized in the flow. All in all the system structure is simple, because the entire system technology comes according to the invention with a small number of components and sensors. This will be a high robustness achieved.

The Renewable system technology offers the advantage of being over Supply and return lines of another heat source or the buffer as an interface many different heat sources integrated can be without that on the heater hydraulic and technical control settings must be made. The Temperature threshold for entry of heat in the buffer memory is kept low, so that all connected heat sources with a relative can start small temperature level and that the storage capacity is well utilized becomes.

Farther may be due to the use of an electronically controlled mixing valve on the one hand the scalding on too hot Hot water can be prevented at high temperature in the buffer tank and on the other hand can also on the usual mixer in the heating circuit be omitted, as well as in heating mode any temperatures on the mixer can be adjusted.

The Drawing represents an embodiment of Innovation dar. It shows:

1 : the schematic structure of a heating and / or hot water preparation system,

2 : the occupancy of the four ports on a two-way three-way mixing valve and

3 Possible positions and the correspondingly adjusting flow paths at the two-three-way mixing valve.

The heating and / or hot water preparation system, consists essentially of a heater 1 with a burner unit 2 , at least one heating circuit connected to it 3 to a heat consumer, one about a heat exchanger 4 connected hot water circuit 5 , one via supply and return lines 6 . 7 Tailored cache 8th and one in front of the burner unit 2 in the return line 9 arranged pump 10 , The buffer tank is heated 8th about a solar system, which essentially consists of one about solar panels 11 guided solar cycle 12 consists.

In the return line 9 to the burner unit 2 is a two-way three-way mixing valve 13 arranged to provide a mixed, unmixed or throttled heating operation and / or hot water preparation operation, bypassing or at least partially including the buffer memory 8th perform. Connected is the two-three-way mixing valve 13 with its four connections with the return line from the heating circuit 3 that into the cache 8th leading return line 7 as well as from the heat exchanger 4 opening out and to the burner unit 2 leading return line 9 , Between the two-way mixing valve 13 and the burner unit 2 opens the supply line 6 from the buffer memory.

At the two-way mixing valve 13 the flow is released through the buffer tank 8th when the temperature at the temperature sensor 14 at the outlet of the heat exchanger 4 and / or in the return line from the heating circuit 3 below the temperature in the upper area of the buffer tank 8th , which with the temperature sensor 15 is detected falls.

The cache 8th flows through at least a partial flow as a bypass and the two-three-way mixing valve 13 opens for at least a partial flow to the buffer memory 8th when the system is in heating mode with the temperature at the temperature sensor 14 and / or in the return line from the heating circuit 3 below the temperature at the temperature sensor 15 in the buffer memory 8th falls.

However, if the system is in the hot water preparation mode and the temperature sensor 16 detected temperature in the return line 9 at the entrance to the burner unit 2 under the with the temperature sensor 14 detected temperature at the outlet of the heat exchanger 4 falls, the cache becomes 8th flows through as a bypass with at least a partial flow and the two-three-way mixing valve 13 opens for at least a partial flow to the buffer memory 8th , The two-way mixing valve 13 serves as a mixing valve when the temperature at temperature sensor 15 in the buffer memory 8th higher than a predefinable setpoint. In the process, the domestic hot water temperature to be regulated is determined by the temperature sensor 17 detected.

According to 3 owns the two-way mixing valve 13 an extended range of rotation of the valve plug 18 to act as a throttle valve.

Claims (4)

Heating and / or water heating system, consisting of a heater ( 1 ) with a burner unit ( 2 ), at least one heating circuit connected thereto ( 3 ) to a heat consumer, one to a heat exchanger ( 4 ) connected hot water circuit ( 5 ), wherein a valve for switching between heating and hot water preparation operation is provided, one via supply and return lines ( 6 . 7 ) connected further heat source or a particular solar heated buffer memory ( 8th ), and one in front of the burner unit ( 2 ) in the return line ( 9 ) arranged pump ( 10 ), characterized in that in the return line ( 9 ) to the burner unit ( 2 ) a two-way mixing valve ( 13 ) is arranged so as to be a mixed, unmixed or throttled heating operation and / or hot water preparation operation, bypassing or at least partially including the further heat source or the buffer memory ( 8th ) that the two-way three-way mixing valve ( 13 ) with its four connections with the return line from the heating circuit ( 3 ), to the further heat source or into the buffer memory ( 8th ) leading return line ( 7 ) as well as from the heat exchanger ( 4 ) and to the burner unit ( 2 ) leading return line ( 9 ) and that between two-three-way mixing valve ( 13 ) and burner unit ( 2 ) a supply line ( 6 ) from the further heat source or the buffer memory ( 8th ). Heating and / or water heating system according to claim 1, characterized in that the two-three-way mixing valve ( 13 ) is a combination of reversing and throttle valve. Heating and / or hot water preparation system according to claim 1 or 2, characterized in that a stepping motor, the two-three-way mixing valve ( 13 ). Heating and / or water heating system according to one of claims 1 to 3, characterized in that the two-three-way mixing valve ( 13 ) an extended range of rotation of the valve plug ( 18 ), so that it acts as a throttle valve in this area.