JPH0336846Y2 - - Google Patents

Description

[Detailed description of the invention] (Application field and overview of the invention) The present invention relates to a hot water supply hopper for a bathtub in which hot water is supplied from a water heater to a bathtub and then reheated by the bathtub. By providing a float valve in the hopper, it is possible to prevent problems caused by air being sucked from the hopper into the circulation pump during the forced circulation reheating process. Furthermore, the present invention aims at simplifying the structure in order to prevent this air suction.

(Prior art and its problems) A device for filling hot water from a water heater to a bathtub has already been proposed in Japanese Utility Model Application Publication No. 60-25854. Hot water is supplied to the water pipe via a hopper to prevent hot water in the bathtub from flowing back into the tap water circuit.

In order to use forced circulation heating for reheating in this type of bathtub, as shown in Figure 3, a valve is opened in the circuit to the hopper 31 when the water is filled, and the water level in the bathtub 10 is detected. It is similar to the conventional one in that a hot water filling valve 37 is inserted which is closed by the output of the water level detecting means. A circulation pump 12 is inserted into 11. The connection part of the hot water filling circuit 3 via this hopper 31 is located on the primary side of this circulation pump 12.

This is because if the hot water filling circuit 3 is connected to the secondary side (discharge side) circuit of the circulation pump 12, the resistance of the circulation pump 12 will be large during filling, and the configuration using the hopper 31 will not allow smooth filling of hot water. Furthermore, during reheating, circulating water may overflow from the hopper 31 due to the pressure of the circulation pump 12.

However, as described above, when the hot water filling circuit 3 is connected to the side where the circulation pump 12 is located, air is sucked from the hopper 31 during forced circulation and this sucked air enters the circulation pump 12. Trigger operation of circulation pump. That is, this causes abnormal heating of the bath pot 1 and a decrease in reheating efficiency.

To solve this inconvenience, there is a device that cuts off the circuit between the hopper 31 and the suction side of the circulation pump 12 during reheating, as disclosed in Japanese Patent Application No. 59-112556 (Japanese Unexamined Patent Publication No. 60-259856). issue)
Or, Japanese Patent Application No. 1983-259587 (Japanese Patent Application No. 1983-138051)
It is proposed as.

All of these devices have a solenoid valve inserted between the suction side of the circulation pump in the circulation circuit and the hopper, and when the reheating operation begins, the solenoid valve is closed by the output from the control device. be done. Therefore, air suction from the hopper can be prevented during the reheating operation.

However, with this prior art, it is necessary to control the relationship between the opening and closing of the solenoid valve and the reheating operation, and it is also necessary to insert a solenoid valve or a three-way switching valve downstream of the hopper, and the piping structure is complicated. It becomes complicated.

(Technical Problem) The present invention has been made in view of the above points, and includes: a circulation circuit 11 connecting a bathtub 1 and a bathtub 10;
A hot water filling valve 37 for drawing hot water from the downstream side of the heat exchanger in the water heater 30 and filling the bathtub with hot water.
For hot water supply of a forced circulation type bath pot, a hot water filling circuit 3 having a hot water filling circuit 3 is connected, a hopper 31 is provided in this hot water filling circuit, and this hot water filling circuit is connected to the primary side of a circulation pump 12 which is connected to a circulation circuit 11. At the hopper, from the hopper 31 to the circulation pump 1
The object of the present invention is to realize suction of air into the hopper 2 with a simple configuration, and to eliminate the need for a special control device to interrupt the circuit from the hopper 31 to the circulation pump 12.

(Technical Means) The technical means of the present invention taken to solve the above problems are as follows: The bottom of the hopper 31 in the hot water filling circuit 3 is formed into a tapered shape that opens upward;
A float valve 4 has an outlet 32 in its center, and closes the outlet 32 when empty and opens by the buoyancy from the water stored in the hopper 31.
1 is provided in the hopper 31.

(Operation) The above technical means of the present invention operates as follows.

When hot water is filled, hot water from the water heater 30 is supplied to the hopper 31. When the hot water stored in this hopper 31 reaches a certain level, the float valve 41
The valve opens and hot water is filled into the bathtub 10 via the hot water filling circuit 3 and the circulation circuit 11.

When stopping this hot water filling operation, the hot water filling valve 37
However, since the bottom of the hopper 31 is tapered to open upward, the water level in the hopper 31 decreases, and eventually the float valve 41 closes. The outlet 32 is closed. Therefore, from now on, air is prevented from flowing into the downstream side of the outlet 32.

In this state, when the reheating operation progresses, the circuit from the hopper 31 to the primary side of the circulation pump 12 is in a state of being cut off by the float valve 41.

In this way, the float valve 41 is reliably closed during the reheating operation without the need for a special control device.

(Effects) Since the present invention has the above configuration, it has the following unique effects.

Since the float valve 41 is reliably closed during the reheating operation without the need for a special control device, air suction from the hopper 31 to the primary side of the circulation pump 12 is reliably prevented during the reheating operation. Of course, the above operation can be ensured without preparing a special control device for controlling the operation of the float valve 41, and the structure is simplified accordingly.

(Embodiment) In the embodiment shown in FIG. The configuration in which the hot water filling valve 37 is inserted on the upstream side is the same as that already described (FIG. 3), and a hollow ball type float valve 41 made of synthetic resin with a small specific gravity is installed in the hopper 31. The bottom of the hopper 31 is tapered, and an outlet 32 is formed at the center of the tapered bottom.

In this bath, the hot water filling operation is started by opening the hot water filling valve 37 as in the conventional example described above, and when the water level in the bathtub 10 reaches a predetermined level, a water level detecting means (not shown) is activated. The output causes the hot water filling valve 37 to close, and the hot water filling operation is stopped. When the hot water filling valve 37 is closed, the inside of the hopper 31 gradually becomes empty, but since the bottom of the hopper 31 is tapered, a hole is formed at the center of the bottom. The outflow port 32 is reliably closed by the float valve 41. Therefore,
When the reheating operation progresses thereafter,
The circuit from this hopper 31 to the primary side of the circulation pump 12 is cut off, and the above-mentioned effects can be obtained.

Next, in the second embodiment shown in FIG.
4.

In this case, the sealing when the hollow ball type float valve 41 closes the outflow port 32 is more reliable than in the case shown in FIG.

In any of the above embodiments, when the hot water is filled,
Since there is water stored in the hopper 31, the float valve 41 is lifted up to the water level by its buoyancy, so by accommodating the float valve 41 in the hopper 31, the hopper 31 becomes The internal resistance does not increase and the hot water can be filled smoothly.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the first embodiment of the present invention, Fig. 2 is an explanatory diagram of main parts of the second embodiment, and Fig. 3 is an explanatory diagram of a conventional example. 10...Bathtub, 11...Circulation circuit, 12...Circulation pump, 3...Hot water filling circuit, 3
0...Water heater, 31...Hopper, 41...Float valve.

Claims (1)

[Scope of utility model registration request] A hot water filling circuit 3, which is provided with a hot water filling valve 37 for drawing hot water from the downstream side of the heat exchanger in the water heater 30 and for filling the bathtub with hot water, is connected to the circulation circuit 11 that connects the bathtub 1 and the bathtub 10. , in a hot water supply hopper of a forced circulation bath pot, which is connected to the primary side of a circulation pump 12 which is provided with a hopper 31 in the hot water filling circuit and which is connected to the circulation circuit 11, the hopper 31 in the hot water filling circuit 3 is The bottom part is formed into a tapered shape that opens upward,
A float valve 4 has an outlet 32 in its center, and closes the outlet 32 when empty and opens by the buoyancy from the water stored in the hopper 31.
1 is provided in the hopper 31 for hot water supply in a forced circulation bath pot.