JPH0317174Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Application and Outline of the Invention) The present invention relates to a water heater with a hot water filling device.

In addition, when hot water is being used in the hot water supply circuit, this device puts the hot water supply circuit into a flow restricting state to ensure the amount of hot water in the hot water supply circuit and to prevent the hot water supply time from extending beyond a certain level. It is something.

(Prior art and its problems) A water heater with a so-called hot water filling device that stops supplying hot water to the bathtub when the water level in the bathtub reaches a certain level has already been disclosed in Japanese Utility Model Application Publication No. 60-25854. ing.

In this conventional water heater with a hot water filling device, as shown in FIG. Hereinafter referred to as hot water filling circuit 2),
It has a structure in which a hot water filling valve 20 is inserted that is kept open during filling and closed when filling is completed, and a certain amount of hot water is stored in the bathtub 40, so-called.
Filling the water will proceed automatically.

However, in most of these types of water heaters, in addition to the hot water filling circuit 2, a hot water supply circuit 3 for the kitchen etc. is provided, and moreover, the water heater is equipped with a hot water temperature adjustment device. will be adopted.

Conventionally, the hot water supply circuit 2 is cut off when the hot water supply circuit 3 is in use due to the above-mentioned hot water temperature adjustment.

Therefore, with this conventional device, it takes a long time to fill the hot water when hot water is often used in the kitchen, such as in the evening.

(Technical Problem) The present invention is a water heater 1 equipped with a hot water filling circuit 2 for filling hot water into a bathtub 40 and a hot water heating circuit 3 other than this, and how to use the hot water heating circuit 3. Regardless, the technical problem is to be able to limit the flow rate of the hot water supply circuit 3 during filling of hot water in order to complete filling of hot water within a certain period of time.

(Means) The technical means of the present invention for solving the above problems is as follows: A water flow detection means 21 is provided in the hot water filling circuit 2, and a throttle valve 5 is provided at the most upstream end of the hot water supply circuit 3 to detect the water flow. The output of the means 21 causes the throttle valve 5 to enter the throttle state.

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

During filling with hot water, hot water is supplied to the bathtub 40 via the hot water filling circuit 2, and the water flow detection means 21 detects the water flow in the hot water filling circuit 2. In this state, hot water supply circuit 3
When the hot water supply circuit 2 is opened, the amount of hot water in the hot water supply circuit 2 will be reduced by that amount.A throttle valve 5 is inserted at the upstream end of the hot water supply circuit 3, and the output of the water flow detection means 21 causes this throttle valve 5 to decrease. throttles the flow rate of the hot water supply circuit 3. Therefore, the amount of hot water flowing from the hot water filling circuit 2 to the bathtub 40 hardly decreases.

Further, since the hot water supply circuit 3 is in the throttled state, it is possible to take out a certain amount of hot water from the hot water supply circuit 3.

Next, when the hot water filling is completed and the hot water filling circuit 2 is cut off, the output of the water flow detection means 21 disappears.
The throttle valve 5 is in an initial state, that is, a non-throttling state,
The hot water supply circuit 3 returns to its normal state.

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

When hot water is used in the hot water supply circuit 3 while hot water is being filled, the hot water supply circuit 3 is automatically set to the throttle state during this time, so the flow rate in the hot water supply circuit 2 is extremely reduced due to the use of the hot water supply circuit 3. Such a situation will not occur, and the inconvenience that the hot water filling time will be significantly longer due to frequent use of the hot water supply circuit 3 can be eliminated.

Also, if hot water supply circuit 3 is used while filling hot water,
Since the hot water supply circuit 3 is placed in the throttled state without being completely cut off, there is no inconvenience that hot water cannot be used in the hot water supply circuit 3 when filling with hot water.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 2 and 3.

The first embodiment shown in FIG.
is used as a water flow switch 22, and the normally closed contact 24 of this water flow switch 22 is inserted into the hot water supply circuit 3.
It is inserted into the second circuit.

As shown in the figure, the water flow switch 22 has a swing piece 53 that swings with the water flow and is equipped with a permanent magnet.
and a reed switch as a normally closed contact 24 corresponding to this, and when a water flow occurs in the hot water filling circuit 2, that is, when hot water is filled, the normally closed contact 24 is opened and the solenoid valve 51 is opened. becomes a flow restriction state.

For this reason, the valve structure of the electromagnetic valve 51 is as shown in FIG. 3, and a through hole 55 of a predetermined size is bored in the outer periphery of the valve seat that the valve body 54 is in contact with. Therefore, when the normally closed contact 24 is opened, the valve body 54 is closed and the flow rate of the hot water supply circuit 3 is restricted by the through hole 55. As a modification of this embodiment, the electromagnetic valve 51 may be a proportional control valve disclosed in Japanese Utility Model Publication No. 18216/1983. In this case, before and after the reed switch is activated,
The structure may be such that the voltage applied to the excitation coil of the proportional control valve has a predetermined ratio.

In the first embodiment, since the flow rate ratio between the hot water supply circuit 3 and the hot water filling circuit 2 changes depending on the installation conditions of the appliance, in order to counter this, the through hole 55 is
However, in the method using this proportional control valve, it is possible to respond to changes in the installation conditions of the appliance by simply changing the voltage ratio applied to the excitation coil.

Next, in the second embodiment shown in FIG. 4, a throttle valve 5 and a water flow detection means 21 are mechanically constructed, and the combination thereof is used as a water flow responsive valve 50. In this device, a vacant chamber 26 equipped with a diaphragm 25 is provided in the hot water filling circuit 2,
Valve shaft 5 that operates integrally with this diaphragm 25
A valve body 54 inserted into the hot water supply circuit 3 is connected to the tip of the valve body 6 . This valve body 54 is provided with a through hole 55 similar to that of the previous embodiment, and when a water flow is generated in the hot water filling circuit 2, the diaphragm 25 is moved by the action of the cavity 26 communicating with the ventilate part.
5 operates, the valve body 54 closes, and the flow rate is restricted. In this case, the combination of the diaphragm 25 and the empty chamber 26 functions as the water flow detection means 21, and the valve body 54 functions as the throttle valve 5.

Furthermore, when a hopper is provided in the hot water filling circuit 2 and the bathtub 40 is filled with hot water by a pump provided on the downstream side of the hopper, if hot water is used in the hot water supply circuit 3, the flow rate of the hot water filling circuit will be significantly reduced. Although air enters from the hopper and the pump does not operate smoothly, the above-mentioned embodiment can eliminate this problem.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the principle of the present invention, Fig. 2 is an explanatory diagram of the first embodiment, Fig. 3 is a detailed diagram of the solenoid valve, Fig. 4 is an explanatory diagram of the second embodiment, and Fig. 5 is an explanatory diagram of the first embodiment. It is an explanatory diagram of a conventional example, and in the figure, 1... Water heater, 2... Hot water filling circuit, 20... Hot water filling valve, 21... Water flow detection means, 3... Hot water supply circuit, 40... Bathtub, 5 ... Throttle valve, 51 ... Solenoid valve.

Claims (1)

[Scope of utility model registration request] In a water heater 1 equipped with a hot water filling circuit 2 for filling hot water into a bathtub 40 and a hot water supply circuit 3 other than this, a water flow detection means 21 is provided in the hot water filling circuit 2, and the hot water supply circuit 3 A water heater with a hot water filling device, in which a throttle valve 5 is provided at the most upstream end of the water flow sensor, and the throttle valve 5 is brought into a throttle state by the output of the water flow detection means 21.