DE3339219A1 - Heating system - Google Patents

Abstract

In a heating system with at least one heat pump connected in a path for a circulating heat carrier, an intermediate section with a non-return valve is provided between the feed and the return of the heat carrier path. The intermediate section divides the heat carrier path into a heat generator circuit and a heat consumer section. The heat generator circuit and the heat consumer section each have at least one circulating pump of their own. When the circulating pump is not delivering in the heat consumer section, the heat pump can continue operating, since the heat carrier can now be circulated in the heat generator circuit, which is closed by the intermediate section, by the circulating pump arranged in it, and thus the required heat withdrawal at the condenser of the heat pump, until an upper temperature limit is reached, is ensured in the heat generator circuit. <IMAGE>

Description

SIEMENS AKTIENGESELLSCHAFT Our mark Berlin and Munich VPA 83 P 3 3 7 O DE

Heating system

The invention relates to a heating system according to the preamble of claim 1.

Heating systems of the type mentioned in the preamble of claim 1 are already generally used and work satisfactorily.

During the operation of the heat pump, however, the circulation pump arranged in the flow line can fail or switched off. If the circulation pump fails or is switched off, there is a lack of flow of the heat transfer medium, the heat of condensation is not dissipated or only insufficiently. This has the consequence that the condensation pressure of the refrigerant flowing around in the heat pump quickly increases to a value increases, at which the heat pump must be switched off for safety reasons.

The object of the invention is to design the heating system of the type mentioned in the preamble of claim 1 so that that a heat transfer medium throughput is ensured through the condenser of the heat pump when the Circulation pump in the flow line does not deliver or delivers insufficiently.

The object set is achieved according to the invention by the design specified in the characterizing part of claim 1.
35

Appropriate training and development of the invention

Bec 25 Bes / 26.o9.1983

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object are specified in claims 2 to 4.

Two embodiments of the invention are shown in the drawing. Show it: 5

1 shows a diagram of a monovalent heating system with a heat pump,

Fig. 2 is a diagram of a bivalent heating system with two heat pumps and one

Boiler.

In the heating system shown in Fig. 1, 1 denotes a heat pump which is routed into a heat transfer medium is involved.

The heat transfer medium has an output line 2 connected to the heat pump 1.

A flow line 3 connects to the output line 2 and ends at a connection point 4.

From the connection point 4, a flow line 5 goes out, which contains a circulation pump 6 and to a Heat consumer 7 is performed.

From the heat consumer 7, a return line 8 leads to a second connection point 9, which has a Return line branch 1o with the input of the heat pump 1 is connected.

To ensure a sufficient heat transfer medium throughput through the condenser of the heat pump 1, if the circulation pump 6 does not deliver enough or stands still, is an intermediate line 11 with a

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Non-return device 12 and a further circulating pump 13 are provided.

The intermediate line 11 extends between the flow line 3 and the return line line 1o, while the further circulation pump 13 in the return line branch 1o is arranged between the connection of the intermediate line 11 and the heat pump 1.

Through the introduction of the intermediate line 11, the heat transfer medium is routed into a heat generator circuit and a heat consumer section can be divided.

The heat generator circuit includes the heat pump 1, the Output line 2, the flow line 3 to the confluence into the intermediate line 11, the intermediate line 11 and the return line branch 1o from the Confluence of the intermediate line 11.

The heat consumer section comprises the rest of the heat transfer medium.

If the circulating pump 6 arranged in the feed line 5 is at a standstill or does not deliver enough, forcing the further circulation pump 13 one cycle in the heat generator circuit 1, 2, 3, 11 and 1o.

The non-return device 12 blocks the intermediate line 11 against backflow if the circulation pump 6 arranged in the heat consumer section is sufficient promotes.

In the heating system shown in Fig. 2, two heat pumps 1 and a boiler 14 are used as a heat source intended.

An output line 2 extends from each heat pump 1.

The "two output lines 2 open into the flow line 3, which is divided into a section 3a and 3b by a four-way mixer 15.

The flow 16 of the boiler 14 is connected to one path of the four-way mixer 15. 1o

The return 17 of the Keizkessel 14 is connected to a further path of the four-way mixer 15.

From the still free path of the four-way mixer 16 leads the section 3b of the flow line 3 to the connection point 4th

As in the embodiment of FIG. 1, the flow line 5 goes from the connection point 4, which the Contains circulation pump 6 and leads to the heat consumer 7, from which the return line 8 extends to the second Connection point 9 extends.

In the embodiment according to FIG. 2, however, a flow line branch 18 also goes from the connection point 4 to a heat exchanger 19 which is arranged in a water heater 2o and is connected to the return line 8 via a return flow 21.
3o

In addition to shut-off valves, a circulating pump 22 is provided in the flow line branch 18.

In the embodiment according to FIG. 2, a mixing line 23 extends from one in the feed line 5 arranged three-way mixer 24 to the return line

device 8. The mixing line 23 and the three-way mixer 24 are also in the embodiment according to FIG applicable.

As in the example according to FIG. 1, the return line runs from the second connection point 9 1o off.

The intermediate line 11 extends between two the section 3b of the flow line and the return line branch 1 ο.

Compared to the embodiment according to FIG. 1, the embodiment according to FIG. 2 is in the return line branch 1o a buffer memory 25 is arranged. In addition, the heat pumps 1, each of which has a circulation pump 13 is assigned, can be bridged by a return pipe 26 which contains a non-return device 27 and in the flow direction of the heat transfer medium behind the buffer storage 25 from the return line branch 1o at the beginning of the lead strand · * section 3a extends.

The buffer store 25 increases the heat transfer medium content of the heat generator circuit 1,2,3a, 3b, 11 and 1o and thus ensures a longer run time for the heat pumps.

The bridging of the heat pumps 1 through the return pipe 26 is necessary in the event that the Circulation pumps6, 22 promote more due to the corresponding heat demand at the heat consumers 7.19 than the circulating pumps 13 assigned to the heat pumps 1. The excess delivery of the circulating pumps 6, 22 is through the return pipe 26 to the heat pumps

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1 and flows from there on the mapped out Way back to the circulation pumps 6.22.

For both examples, the temperature in the heat generator circuit 1,2,3,1o, 11 is regulated. in the In the case of the example according to FIG. 2, for example, a step-by-step switching mechanism guided by a heating controller the individual heat sources 1 and / or 14, depending on the required flow temperature, switch on or off.

For both examples it also applies that the respective heat consumer sections have their own temperature control is provided.

4 claims

2 figures

Claims (4)

Claims Heating system, with at least one heat pump and a heat transfer medium, consisting of one on the output line connected to the heat pump, one connected to the output line and flow line ending in a first connection point, at least one containing a circulating pump Flow line, which extends from the connection point to a heat consumer, a from the heat consumer to a second connection point guided return line and one from the second Connection point to the return pipe leading to the heat pump, characterized in that that from the flow line (5) to the return line line (1o) with a non-return device (12) provided intermediate strand (11) with which the heat transfer medium in a heat generator circuit (1,2,3,11,1o) and can be divided into a heat consumer section, and that the heat generator circuit (1,2,3,11,1ο) with its own Temperature control is provided and has its own circulating pump (13). 2. Heating system according to claim 1, characterized in that the heat pump (1) through one from the return line branch (1o) to the flow branch (3) guided return pipe (26) containing a non-return device (27) can be bridged is. 3. Heating system according to claim 1 and 2, characterized in that im Return line harness (io) a buffer tank (25) is arranged. # VPA 83 P 33 7 O OE 4. Heating system according to claim 1 to 3, characterized in that the Heat consumer circuit (1,2,3,11,1o) has its own temperature control.