JPS58217144A - Tap-controlled hot-water supplying device heated by town gas - Google Patents

Abstract

PURPOSE:To obtain hot-water with a set temperature without adjusting a water cock upon switching the capacity of the device by a method wherein the amount of feed water is limited in accordance with the selected capacity of the hot- water heater. CONSTITUTION:A gas pipe 2 for the burner 3 of the hot-water heater 1 is provided with a main solenoid valve 8 and a gas volume switching valve 9 while a feed water pipe 4 for the heat exchanger 5 is provided with a water volume switching valve 11 and each valves 8, 9, 11, are connected to a control box 12. A signal A is sent to the gas volume switching valve 9 and the water volume switching valve 11 in accordance with the capacity selected by a capacity switching switch 14 in the control box 12 to control the volume of the gas and the same of the water stepwisely and respectively.

Description

[Detailed description of the invention] The present invention relates to a gas instantaneous water heater.

For example, a conventional gas instantaneous water heater has two capacity limit curves a and b, as shown in Figure 3, and if the water supply amount is set to Ql, the capacity is set to the smaller one. Then, the water temperature will fall along the capacity limit curve of a, reaching the temperature at the intersection of Ql and a.Even if you try to get hot water at 40℃, the actual temperature of the hot water supplied will probably be lower. It becomes the temperature.

Therefore, in order to get hot water around 40℃, turn off the faucet.
The amount of water supplied must be reduced to Ql.

Not only is it inconvenient to use, but it is also difficult to tighten the faucet, making it impossible to accurately adjust the water temperature to the desired temperature.

It is an object of the present invention to solve the above-mentioned problems and to make it possible to obtain hot water at a set temperature without having to turn off the faucet even if the capacity is changed.

The basic configuration of the present invention is that when changing the level of ability,
By installing a valve in the water supply piping that automatically varies the amount of water supplied according to the changed capacity level, the amount of water supplied is automatically changed to the amount that provides hot water at the set temperature. It is.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In Figure 1, (1) is a gas instant water heater, gas is sent to a burner (3) through a gas supply pipe (2) and burned there, and water is sent through a water supply pipe (4). heat exchanger (5)
It is heated here and passes through the hot water pipe (6) to the faucet (7).
), and the gas supply pipe (2
) is provided with a solenoid valve (8) and a gas amount switching valve (9), with the former placed on the upstream side, and the water supply pipe (4) is connected to the hot water supply pipe (
In the water supply pipe (to) 6), in the illustrated example, the water supply pipe (4) is provided with a water volume switching pulp (b).

The above-mentioned original solenoid valve (8), gas amount switching valve (9), and water amount switching pulp C1,) are electrically connected to the control box @.

The control box (b) is equipped with a main switch (6) for turning on and off the operation of this water heater, and a two-stage capacity selection switch (b), which is selected by the capacity selection switch a4. The signal A is sent to the gas volume switching valve (9) and the water volume switching valve (9) depending on the stage of capacity.
11).

Based on the signal A, the gas amount switching valve (9) sends to the burner (3) the amount of gas necessary to have any of the capacity limit curves aXb shown in FIG. 3, for example.

Further, the water amount switching pulp (2) receives the signal A and limits the amount of water supplied to the amount of water corresponding to the capacity stage having the selected capacity limit curve.

That is, when the selected capacity has a capacity limit curve a in FIG. 3, the water amount is limited to Ql, and when it has a capacity limit curve b in FIG. 3, the water quantity is limited to Ql.

FIG. 2 shows an example of the water volume switching pulp (2).

The water volume switching pulp (2) has a water inlet (to) and a water outlet (1f).
The middle of the flow path (B) that connects J is divided into an inlet side and an outlet side by a partition wall (to), and there are two holes in the partition wall (to) that connect the inlet side and the outlet side. (to)... has been established.

The above hole (6) can pass the amount of water Ql, and the hole (to)
and l:IQ has a size that allows the amount of water Ql to pass through, and a valve body (b) that opens and closes the hole faces the hole.

The valve body (2) is held by a spindle 4, which extends to the outside via a sealing member.

Also, the valve body (B) has a spring (
It is activated by 9) and held in a state where the hole (1) is opened, and when it receives a signal person, it moves forward and closes the hole (1).

Therefore, this water amount switching valve sword η supplies the water amount of Ql to the heat exchanger (5) when the hole is open, and when the hole is closed, it supplies the water amount of Ql to the heat exchanger (5). The amount of water required to pass through the heat exchanger (5), that is, Ql, is supplied to the heat exchanger (5).

Therefore, in this water heater, when the capacity selector switch α fathom is turned on, the amount of gas necessary to have the capacity limit curve b is supplied to the burner (6), and the water quantity selector pulp (5) is supplied to the burner (6). ) is in the state where the hole ■ is open, and the heat exchanger (5) is supplied with water in an amount of Ql through the two holes Q1... of the water volume switching pulp CLI), and the hot water temperature is , the intersection point of the capacity limit curve of b and Ql, which is 40° C. in FIG.

From this state, when the capacity selector switch α is switched to small, the gas volume selector valve αη is switched and the capacity limit curve is changed to a, but at the same time, the valve body (b) of the water volume selector pulp CIη is switched. closes the hole..., and one hole (
From (to), only the amount of water Ql is supplied, and the hot water temperature becomes the intersection of the capacity limit curve a and Q□, and is maintained at 40°C.

Since the present invention has the above configuration, it has the following advantages.

(1) A valve is installed in the water supply piping to automatically limit the amount of water supplied according to the selected capacity of the water heater, so the capacity of the water heater can be adjusted from small to small, for example from size 16 to size 14. Even if you switch to , you won't be able to get hot water at the same temperature as when you were using the No. 16 capacity without having to turn down the faucet to adjust it, and you won't have to worry about having to turn down the faucet to adjust it. It's not easy to use.

(2) When switching the capacity of the water heater from small to medium, there is no risk of hot water suddenly coming out.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a gas instantaneous hot water supply device showing an example of the implementation of the present invention, Fig. 2 is a sectional view showing an example of water volume switching pulp, which is one of the main components of the present invention, and Fig. 3 is a hot water temperature characteristic diagram. 1...- Water heater 10... Water supply piping 11...
・Pulp that limits the amount of water supplied (Water amount switching pulp) Procedural amendment document August 1983/g Date Kazuo Wakasugi, Commissioner of the Patent Office (Examiner of the Patent Office) 1, Indication of case Patent application No. 100194 of 1982 No. 2, Name of the invention Gas instant water heater 3, Relationship with person making the amendment A. 1 Patent applicant Name (AO8) Totokiki Co., Ltd. 4, Agent address Bunkyo-ku, Tokyo Hakusan 5-14-7-5, Voluntary amendment with the date of amendment order) Showa, Month, Day 6, Subject of amendment (1) Drawing

Claims (1)

[Claims] A valve is provided in the water supply piping or hot water supply pipe of the gas instantaneous water heater whose capacity can be changed in multiple stages to automatically limit the amount of water supplied according to the selected capacity of the water heater. A gas instantaneous water heater.