JPS5816093B2 - Hot water heating system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot water supply and heating apparatus that supplies water released when the pressure of the hot water supply circuit increases to the heating circuit, thereby omitting the labor of supplying water to the heating circuit.

In open hot water heating circuits, the amount of water in the circuit decreases due to expansion water discharge, evaporation, and water leakage.
It is necessary to replenish water regularly.

Conventionally, as the water replenishment means, there has been a method of automatically supplying water using a cistern, or a method of providing a water tank in a part of the circuit and manually supplying water by the user.

However, the former method had drawbacks such as complicated construction and the need for expensive accessory equipment.

Furthermore, the latter method has the disadvantage that the user has to replenish it frequently, which is very time consuming, and an improvement has been strongly desired.

Therefore, an object of the present invention is to automatically replenish the heating circuit with water and to simplify the construction work without using a distern.

In order to achieve this objective, the present invention has one end connected directly to a water faucet and the other end directly connected to the water faucet via a check valve.
A part of the water supply path is provided with a hot water supply path that runs through an open type water storage tank having a water supply port above, and a relief valve having a relief valve that opens at a constant pressure is provided between the above-mentioned check valve and the water faucet of the hot water supply path. The passage is branched, and the downstream side of the relief passage is led to the water supply port of the water tank.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a heating heat exchanger, which is equipped with a burner 2 inside, a water storage tank 3 at the top, hot water pipes 4,
Together with the return pipe 5, circulation pump 6, and radiator 7, it constitutes a heating circuit.

On the other hand, the hot water supply path includes a stop valve 10 for maintenance and inspection in the path between the coil-shaped hot water heat exchanger 8 built into the water storage tank 3 and the water pipe 9, and a stop valve 10 for preventing backflow to the water pipe 9. Stop valve 1
1. It is configured by connecting a pressure reducing valve 12 to keep the water supply to the hot water supply heat exchanger 8 at a constant low pressure.
A relief passage 1 is connected from the downstream side of hot water supply passage 2 via a relief valve 13 to prevent damage to equipment when the internal pressure of the hot water supply passage rises.
4 are branched.

The hot water heated by the hot water supply heat exchanger 8 is supplied to various faucets 1
5 by piping.

In other words, the faucet 15 is directly connected to one end of the water supply channel, and the water pipe 9 is directly connected to the other end.

Further, a water supply port 16 is provided protruding from the upper part of the water storage tank 3, and the water discharged from the relief valve 13 is guided onto the water supply port 16 by a relief passage 14. .

In the above configuration, first, the stop valve 10 is opened and the faucet 15 is closed to fill the hot water supply path with water.

The heating circuit is also filled with water from the water supply port 16 using a bucket or hose.

Next, the burner 2 is ignited and the circulation pump 6 is started to start heating.

The heating heat exchanger 1 is heated, and the water inside becomes high temperature.
Eventually, the water in the water tank 3 also becomes high temperature.

At this time, the water in the heating circuit expands and increases in volume, and this expanded water is discharged from the upper side of the water tank 3 to the external drain 17 through the overflow pipe 18.

Moreover, the hot water supply heat exchanger 8 is also heated and the water in the passage expands.

Since this path is closed by the check valve 11 and the faucet 15, the internal pressure of the hot water supply path increases due to the expansion.

When the internal pressure exceeds the set pressure of the relief valve 13, the relief valve 13 opens and releases expanded water through the relief passage 14 to lower the internal pressure.

Expanded water released from the escape passage 14 flows into the water storage tank 3 from the water supply port 16.

If the water in the heating circuit is low, a portion of this expanded water is stored until the heating circuit is full, and the remainder is drained away via the overflow pipe 18.

In this way, even if the water in the heating circuit decreases due to evaporation during the day, it will always be replenished by the expanded water in the hot water supply path when the system is started the next morning, so the water will always remain full. It is something that can be done.

Of course, it goes without saying that if you turn on and off the device many times a day, you will be able to obtain make-up water that many times, making it more reliable.

The operation when only hot water is being supplied is the same as before.

By the way, the internal pressure in the hot water supply circuit increases not only due to such expanding water, but also due to the so-called water hammer effect that occurs when the faucet is suddenly closed during hot water supply. .

It is clear from the above configuration that all of these functions operate when the internal pressure increases.

Furthermore, the outlet of the relief passage 14 is provided above the water level of the water tank 3 when it is full, and further above the water supply port 16 even if the overflow pipe 18 becomes clogged with scale, etc. Also, hot water for heating will not flow back into the hot water supply path.

Furthermore, if a stop valve 19 that is manually opened and closed is provided in parallel so as to bypass the relief valve 13 as shown in FIG. 2, the stop valve 19 can be opened even when the relief valve 13 is not operating. Water can be supplied.

Therefore, water can be easily supplied to the heating circuit in the initial stage without using buckets or hoses.

Further, as shown in FIG. 3, a bottom plate 21 has a secondary water supply port 20 communicating with the water tank 3 on the lower surface of the protrusion having a water supply port 16.
, the space formed by these is used as a reserve water tank 22, and the overflow pipe 18 is connected to the side surface, so that the expanded water from the hot water supply path flows into the reserve water tank 22 from the water supply port 16 (primary water supply port). However, if the water is full (the state shown in FIG. 3), water is drained from the overflow pipe 18 without mixing with the water in the water tank 3 due to the bottom plate 21.

This is especially effective if antifreeze or rust preventive is added to the heating circuit, as it can be used to reduce the concentration of antifreeze or rust preventive.

If the expanded water in the hot water supply path is insufficient or too large, a can water amount regulator 23 may be used that can adjust the amount of can water in the hot water heat exchanger 8 according to the scale of the heating circuit, as shown in FIG.

Various volumes are prepared for this, and the most suitable one is selected and attached to the heat exchanger 8.

As can be seen from the above embodiments, according to the present invention, the water discharged from the hot water supply path is sent to the water tank of the heating circuit and used as make-up water to the circuit, so there is no need for periodic manual water supply. This eliminates the need for complicated and expensive accessory parts such as those mentioned above, as well as any necessary construction work, making it possible to obtain a product that is inexpensive and has fewer failures.

In addition, the expanded water from the hot water supply is not completely discharged, but is used as make-up water, so water can be used effectively.

[Brief explanation of the drawing]

FIG. 1 is a water circuit diagram of a hot water supply and heating device showing an embodiment of the present invention, FIG. 2 is a water circuit diagram showing another embodiment, and FIG. 3 is a sectional view of a water tank section showing another embodiment. FIG. 4 is a sectional view of the water flow regulator. 3...Water tank, 9...Water pipe, 11.
...Check valve, 13...Relief valve, 14...
...Relief path, 19... Stop valve, 22.
... Reserve water tank, 23 ... Water volume regulator.

Claims (1)

[Scope of Claims] 1 One end is directly connected to a water faucet, the other end is directly connected to a water pipe via a check valve, and has a relief valve that opens at a certain pressure or more from between the check valve and the faucet. A hot water supply route that branches off from the escape route,
and a heating circuit connected to an open type water storage tank having a water supply port at the top, a part of the hot water supply path passing through the water storage tank, and a part of the relief path downstream of the relief valve connected to the water supply port of the water tank. A led hot water heating system. 2. The hot water supply and heating device according to claim 1, wherein a stop valve is connected in parallel to the relief valve. 3. The hot water supply and heating device according to claim 1, wherein a reserve water tank having an overflow pipe is provided in the water storage tank, and a relief path is led to the reserve water tank. 4. The hot water supply and heating device according to claim 1, wherein a canned water flow regulator is connected in the middle of the hot water supply circuit.