JPS5911310Y2 - Cistern with built-in pump - Google Patents

Description

[Detailed explanation of the invention] This design makes it possible to omit, to the extent possible, a pressure reducing valve to prevent excessive pressure from being applied to the boiler in systems where hot water heated in a boiler is supplied by a pump. It is something.

Conventionally, when tap water is temporarily stored in a water tank and then heated in a boiler to supply hot water, a pump 4 is connected between a water tank 2 to which a water pipe 1 is connected and a boiler 3, as shown in Fig. 1. Although the water in the water tank is transferred to the boiler 3 and heated by the pump, a pressure reducing valve 5 is connected between the pump and the boiler so that the discharge pressure of the pump 4 does not directly apply to the boiler 3.

However, when the pressure is lowered by the pressure reducing valve, the hot water pressure on the outlet side of the boiler also decreases, so there is a drawback that although hot water can be supplied to faucet A located at a low location, hot water cannot be supplied to faucet 8 located at a high location.

The present proposal eliminates these drawbacks, and will be explained below based on Figure 2. 6 is a cistern with a built-in pump, a water tank 7 is installed in the upper part, and a four-way valve 8 and a pump 9 are installed in the lower space. and a pressure tank 10, etc., and a water outlet 11 for connecting an external boiler to the side wall of this lower space.
A water return port 12 and a piping port 13 for connecting a water supply pipe to a faucet are provided.

An inflow pipe 14 for tap water is provided at the top of the tank 7, and a ball tap 15 is connected to the pipe to maintain the water level in the tank 7 at a predetermined level and to prevent overflow when the water level rises above the specified level. It is made to overflow from the water pipe 16.

17 is a drain port. Further, the four-way valve 8 has each opening a, l)
. It is possible to connect an external boiler between the two.

18 is a check valve, and 19 is a pressure switch. Figure 3 shows piping for hot water supply, in which a cistern 6 with a built-in pump is installed above the boiler 20, a water pipe 21 is connected to the inflow pipe 14 of the water tank, and a large number of faucets, spouts, and ...
... connect the water supply pipe 22 having the pipe to the piping port 13, and connect the boiler 20 between the water outlet 11 and the water return port 12,
A boiler 20 is connected between the water tank 7 and the pump 9 by operating the four-way valve 8.

When connected in this manner, the water in the water tank 7 flows into the boiler 20 due to the difference in head, so that by rotating the pump 9, hot water can be immediately supplied to the faucet I.

FIG. 4 shows another embodiment, in which the boiler 20 has a hot water supply can 23 and a heating can 24, and the hot water supply can and heating can are connected via different check valves 25 and 26, respectively. It is connected to the water spout 11.

The exit side of the hot water supply can 23 is the ice return port 12 as in the case of Fig. 3.
However, the heating can 24 is connected to the circulation pump 2.
7 and a heat sink 28 are connected in a loop.

Two are pressure tanks.

If the cistern 6 with a built-in pump is installed above the boiler 20 in this way, the water in the water tank 7 will automatically flow into the boiler 20, so there is no need to connect a pump between the water tank and the boiler. It is only necessary to connect it to the outlet side of the boiler 20, so there is no need to use a pressure reducing valve like in the past, and even if the faucet A, the spout, etc. are located at a high position, sufficient hot water can be supplied. can.

However, depending on the installation location, the cistern 6 with a built-in pump cannot be installed above the boiler 20, and may have to be installed on the same floor surface.

In that case, it is not possible to create a head difference between the water tank and the boiler, so a pump must be connected between the two.

In this case, the piping port 13 is connected to the boiler 20, and the four-way valve 8 is switched so that the pump 9 is interposed between the water tank 7 and the boiler 20 as shown in FIG.

In this case, a pressure reducing valve 30 is installed between the pump 9 and the boiler 20.
I have no choice but to connect it.

As described above, the present invention includes the four-way valve 8 in the cistern 6 with a built-in pump, so by switching this four-way valve, the water tank 7 in the cistern 6 can be directly connected to the pump 9, or the water tank and the pump can be connected. If the cistern 6 is installed above the boiler 20, it can be connected in the latter manner, omitting the pressure reducing valve, and hot water can be supplied to a high position.

Although the former method requires a pressure reducing valve, the cistern 6 and the boiler 20 can be installed and used on the same floor, and can be used depending on the size of the installation location. .

[Brief explanation of the drawing]

Figure 1 is a diagram showing the connection state of a conventional cistern and boiler, Figure 2 is a longitudinal cross-sectional view of the proposed cistern with a built-in pump, and Figure 3 is a diagram showing the connection state of a conventional cistern and boiler.
5 to 5 are diagrams showing various connection states between the cistern with the built-in pump of the present invention and the boiler. 7...Aquarium, 8...Four-way valve, 9...
...Pump, 10...Pressure tank, 11...
...Water outlet, 12...Return port, 20...
···boiler.

Claims (1)

[Scope of utility model registration request] A water tank is provided in the upper part, a four-way valve, a pump, and a pressure tank are housed in the lower space, and a discharge port and a return port for connecting to an external boiler etc. are provided in the side wall of the lower space, and the four-way valve has four openings. Each opening is connected to the water tank, the pump, the water outlet, and the water return port, respectively, and the four-way valve can be used to switch between directly connecting the water tank and the pump, and connecting a boiler or the like between the water tank and the pump. A cistern with a built-in pump.