JPS5924333B2 - Central heating system with hot water function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a central heating system having a hot water supply function that can automatically adjust the hot water temperature in conjunction with a circulation pump and a heat source device.

Conventionally, hot water is supplied from a hot water central heating system, as shown in FIG. A heating heat exchanger 6 is connected, a water supply pipe 7 from the water supply is connected to a hot water storage tank 5, and hot water is supplied from a hot water supply circuit 8, and a hot water supply/heating boiler 9 as shown in Fig. 2 is used. In some systems, a heat exchanger 10 and a radiator 11 on the can side or coil side are connected via piping via a circulation pump 12 to perform heating, and a hot water supply circuit 14 is connected from the other heat exchanger section.

These types of heat source equipment and circulation pumps are equipped with signal electrical wiring 15.15 and remote control switch box 16.
16' and was able to be operated from inside the room, but it did not start or stop in conjunction with the use of each terminal or hot water supply.

In addition, when it comes to hot water temperature, the boiler itself has a built-in hot water thermostat, or the temperature is set to give priority to heating, or the hot water is stored at an unnecessarily high temperature, resulting in wasteful heat loss. .

The present invention aims to improve these conventional drawbacks and provide a completely new hot water supply system that can be installed in conjunction with a heating system. Next, an example of the configuration of the central heating system with a hot water supply function will be described with reference to the drawings.

FIG. 3 shows a circuit diagram of the present invention.

Reference numeral 11 denotes a unit heat source device in which a heat source device 18, a water supply tank 19, a circulation pump 20, and a remote control unit 21 whose detailed configuration is shown in FIG. 4 are integrated into one unit.

This unit heat source device 17 is connected in parallel with a heating circuit 24 formed by piping connection to a radiator 23 via a branch header 22.
A heating circuit 26 for a secondary heat exchanger 25 for hot water supply is provided.

An electric flow path opening/closing valve 28 that opens and closes by detecting the stored hot water temperature with a hot water temperature thermometer 27 is interposed in the heating circuit.

29 is a hot water supply faucet circuit that supplies hot water produced by the secondary heat exchanger 25 for hot water supply.

Reference numeral 30 designates another secondary heat exchanger for hot water supply, which has a configuration in which a circuit 31 corresponding to a hot water supply faucet circuit is placed on the coil side.

Next, the operation will be explained together with the remote control unit 21 shown in FIG.

All the terminals shown in FIG. 3 are equipped with flow path opening/closing valves that are opened and closed manually or automatically.

When the flow path opening/closing valve of any one of the terminals is opened, the remote control unit 21 connected quickly to the discharge port side of the circulation pump 20 supplies hot water from the inlet 32 to the outlet 33 as shown by the arrow. is flowing, pushing up the check valve/flow rate detection valve element 35 of the flow rate detection mechanism section 34, pushing said 35 away from the movable valve seat 36, and circulating the flow.

At this time, the displacement of the valve body 35 is detected by a normally closed type microswitch 39 that is in contact with the arm 38 exposed to the outside via the seal packing 37, and it is detected that the hot water fluid is circulating. The circulation pump 20 and the heat source device 18 are kept in operation.

This also applies when the channel opening/closing valves of all terminals are open.

However, when the flow path opening/closing valve 28 of all the terminals is closed, that is, in summer, when the heating circuit is not in use, only one terminal has the flow path opening/closing valve 28 open, and the secondary hot water supply valve 28 is closed. The heat exchanger 25 that was in heating operation reached the set temperature, so the water temperature thermostat 27 activated the valve 28.
is closed and all circulation circuits are cut off, the flow rate detection valve body 35 that also serves as a check valve is operated by the movement of the biasing spring 40.
It descends while touching the movable valve seat 36, and finally, with the arm 3B, the flow rate detection microswitch 39 is set to rOF'.
Fj.

Then, the circulation pump 20 and the heat source device 18 are stopped, the outflow side circuit of the reverse flow rate detection valve body 35 is almost at the cut-off pressure of the circulation pump 20, and the inflow side circuit is connected to the water supply tank 19. The water level head pressure becomes only , and due to the pressure difference, the valve body 35 is pressed against the valve seat so as to function as a check valve.

At this time, the bellows 7 ram 42 of the pressure detection mechanism section 41 is pushed upward by the discharge pressure of the circulation pump 20, and the pressure detection microswitch 43 is turned OFF.

The pressure is maintained between the check valve and flow rate detection valve element 35 and the closed flow path opening/closing valve of each terminal.

The volume corresponding to the displacement of the bellows 7 ram 42 also serves as a cushion in actual use against thermal contraction and leakage of the pressure holding path.

Even so, if the pressure holding path pressure decreases beyond that limit, the pressure detection microswitch 43
L. Start the circulation pump, but only pressurize for 1 to 2 seconds and then stop immediately.

On the other hand, if the flow path opening/closing pulp of any one terminal device is opened, the pressure in the pressure holding path will escape to the return pipe side,
Turn on the pressure detection microswitch 43 and start the circulation pump in the same manner as above.

Here, the difference from the above-mentioned simple pressurized operation is that the flow path opening/closing pulp is opened, so the fluid circulates and flows due to the operation of the circulation pump, pushing up the valve body 35 and turning on the flow rate detection micro switch 39. Turn it “ON”.

By providing the pressure detection microswitch 43 and the flow rate detection microswitch 39 in parallel with the power supply circuits of the circulation pump 20 and the heat source device 18, activation is performed by the pressure detection microswitch 43, and stopping is performed by the flow rate detection microswitch. By using the switch 39, it is not affected by the size of the head performance of the circulation pump, and can be applied to any system.

As explained above, the present invention combines a cordless remote control heating system and a secondary heat exchanger for hot water supply equipped with a flow path opening/closing valve linked to a hot water temperature thermostat. This provides a new hot water supply system that works efficiently and automatically controls the water temperature to any desired temperature.

■ In addition, by connecting multiple secondary heat exchangers for hot water supply, it is possible to supply hot water with different settings, and ■ it is also possible to install secondary heat exchangers for hot water supply close to the location where hot water is used. The distance of the water supply piping to the faucet is short, and the desired hot water temperature can be obtained as soon as the faucet is opened.

■ The method of secondary heat exchanger (hot water storage type, instantaneous coil type) can be freely set, and the one suitable for the hot water supply purpose can be selected.

■ In addition to being installed alongside the heating circuit, hot water can be processed using a heat source, and the hot water is circulated only in the used channels, and the unused channels are closed with channel opening/closing pulp, so that no water is removed from the unused channels. , there is no unnecessary heat loss, and economical energy-saving operation is possible.

It has great effects and provides a new way of heating hot water.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing a conventional example, Fig. 2 is a circuit diagram showing another conventional example, Fig. 3 is a circuit diagram showing an embodiment of the present invention, and Fig. 4 is a diagram of a remote control unit. A cross-sectional view is shown. 17...Unit heat source machine, 18...Heat source machine, 19.
...Hot water tank, 20...Circulation pump, 21...Remote control unit, 23...Radiator, 24...Heating circuit.

Claims (1)

[Scope of Claims] 1. A secondary heat exchanger for hot water supply is connected to a hot water circulation circuit of a hot water type central heating system, and the heating circuit communicating with the hot water circulation circuit detects the temperature of the hot water supply and controls the temperature to be below a certain set temperature. In addition to intervening a flow path opening/closing valve that opens when the temperature reaches a certain temperature and closes when the temperature exceeds a certain set temperature, a flow path opening/closing valve is also provided for each terminal device such as another radiator, and the opening/closing operation of these flow path opening/closing valves is provided. The circuit is configured so that the internal pressure and flow rate of the hot water circulation circuit, which changes during operation, can be detected by a remote control unit installed on the heat source body side, and the circulation pump can be started and stopped remotely without a cord. , a central heating system with a hot water supply function, which is characterized by the addition of a hot water supply function that automatically maintains the hot water at a set temperature. 2. The central heating system with a hot water supply function according to claim 1, characterized in that a plurality of the secondary heat exchangers for hot water supply are connected to a hot water circulation circuit and installed close to a hot water supply usage point.