JPH0332930Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a water heater that supplies hot water to multiple locations.

(Prior art) A conventional device of this type includes a heat exchanger and a burner whose heating capacity can be switched freely, and supplies hot water obtained through the heat exchanger to multiple locations such as the kitchen, bathroom, etc. Things are known.

(Problem to be solved by the invention) However, in the conventional device described above, the capacity of the burner is manually changed according to the amount of water supplied, etc., so the switching operation is troublesome, and if the switching operation is forgotten, the desired temperature is reached. It is dangerous, especially if hot water is supplied to a point with a small flow rate while the burner is set to high capacity, hot water will come out.

(Means for solving the problem) The present invention attempts to eliminate the above-mentioned drawbacks of the conventional device by automatically switching the burner to a high capacity when hot water is supplied to a hot water supply point that uses a large flow rate. A device that is equipped with one heat exchanger and a burner whose heating capacity can be freely switched, and supplies hot water obtained through the heat exchanger to multiple locations such as a kitchen, a bath, etc. A plurality of hot water supply lines for supplying hot water to the plurality of locations are connected to the outlet side of the exchanger,
A water flow sensor is interposed in a hot water supply path to a hot water supply point using a large flow rate among the plurality of hot water supply paths, and the burner is switched between high capacity and small capacity by the water flow sensor.

(Function) The present invention has the above-mentioned configuration. According to this, when hot water is supplied to a hot water supply area that uses a large flow rate such as a bath, a water flow sensor installed in the hot water supply path is activated and the burner is automatically activated. When supplying hot water to a hot water supply point that uses a small flow rate, such as a kitchen, the water flow sensor becomes inactive and the burner automatically switches to a small capacity, and then when supplying hot water to a hot water supply point that uses a small flow rate, such as a kitchen, the water flow sensor becomes inactive and the burner automatically switches to a small capacity. When simultaneously supplying hot water to a hot water supply point that uses a small flow rate, the water flow sensor is activated and the burner is automatically switched to a high capacity, allowing the burner capacity to be set according to the usage conditions.

(Example) Next, an example of the present invention will be described based on the drawings.

In FIG. 1, 1 indicates a water heater, and the water heater 1 includes one heat exchanger 2 and a burner 3 for heating it.
That is, the heat exchanger 2 includes two burners 3a and 3b arranged in parallel on the lower surface thereof.

In order to supply hot water to multiple locations such as a bath, kitchen, washroom, etc., this water heater 1 has a hot water supply path 4 to each location.
A, 4b, 4c, .
A, 7b, 7c, . . . branch pipes are integrally attached to each other, and each hot water supply path 4a, 4b, 4c, . In this case, the hot water supply path 4a to hot water supply points that use a large flow rate, such as a bath, uses a hot water supply pipe with a relatively large diameter according to the amount of hot water used, and the hot water supply path to hot water supply points that use a small flow rate, such as the kitchen and washroom, is used. 4b, 4c are hot water supply pipes with a relatively small diameter, and hot water taps 8a, 8b,
8c..., and a water flow sensor 9 that issues an activation signal at the time of hot water supply is interposed at the hot water outlet 7a.

Furthermore, a temperature sensing element 10 is interposed in the hot water supply pipe 6, and gas supply paths 11a and 1 of each burner 3a and 3b are provided.
Proportional control valves 12a, 12b and on-off valve 13 are installed in 1b.
a and 13b were interposed.

In the figure, reference numeral 14 controls the opening degrees of the proportional control valves 12a and 12b based on the actual water supply temperature signal detected by the temperature sensing element 10, and the operation from the water flow sensor 9;
A combustion control circuit is shown that controls opening and closing of the on-off valve 13b based on a non-operation signal, and 15 is a water supply pipe connected to the inlet of the heat exchanger 2. When hiding, open hot water tap 8
When a is opened, water flows into the hot water supply pipe 6, another water flow sensor (not shown) installed therein is activated, the combustion control circuit 14 opens the on-off valve 13a, and at the same time water flows into the hot water supply path 4a. The water flow sensor 9 is activated, the combustion control circuit 14 opens the on-off valve 13b, and the burner 3 has a large capacity for burning both burners 3a and 3b, and the hot water temperature signal and set temperature signal from the temperature sensing element 10 are The proportional control valves 12a and 12b are controlled to an opening degree corresponding to the difference signal, and hot water at a desired temperature is supplied to a hot water supply location that uses a large flow rate, such as a bath.

Also, when the hot water outlet tap 8a is closed and the hot water taps 8b and 8c are opened, another water flow sensor is activated in the same way as described above, the on-off valve 13a is opened by the combustion control circuit 14, and the water flow sensor 9 is deactivated. The on-off valve 13b is closed by the control circuit 14, and the burner 3 has a small capacity in which only one burner 3a burns, and the opening degree corresponds to the difference signal between the hot water supply temperature signal from the temperature sensing element 10 and the set temperature signal. Proportional control valve 12
a is controlled, and hot water at a desired temperature is supplied to hot water supply locations where a small flow rate is used, such as the kitchen and washroom.

Furthermore, when the hot water taps 8a, 8b, and 8c are opened, the on-off valve 13 is opened in the same way as when the hot water tap 8a is opened.
a, 13b are opened, the burner 3 has a large capacity, and the proportional control valves 12a, 12b are controlled to supply hot water at a desired temperature to each hot water supply point.

FIG. 2 shows another embodiment of the present invention, in which a common 1
The relatively large-diameter hot water supply path 4 is pulled out, and its tip is sequentially branched under the floor and other places to create a bathroom, kitchen, etc.
This embodiment is not particularly different from the embodiment shown in FIG. 1, except that hot water is supplied to multiple locations such as the washroom, and a water flow sensor 9 is interposed in the hot water supply path 4a to the hot water supply location that uses a large flow rate such as a bath. .

FIG. 3 shows still another embodiment of the present invention, in which the burner 3 is composed of 162 nozzles in which a proportional control valve 12 and an on-off valve 13 are interposed. The first difference is that the capacity is high when the gas is ejected, and the small capacity is when the gas is ejected only from the nozzle 16a.
There is no particular difference from the embodiment shown in the figure.

In the embodiments shown in FIGS. 1 and 3, the water flow sensor 9 is provided in the branch part 5 that is integrated with the water heater main body 1, so that all combustion control can be performed on the water heater main body 1 side, which is convenient. be.

(Effect of the invention) As described above, according to the invention, a water flow sensor is interposed in the hot water supply path to the hot water supply point where a large flow rate is used among the plurality of hot water supply paths connected to the outlet side of one heat exchanger, The water flow sensor is used to switch the burner between high capacity and low capacity, so when hot water is supplied to a hot water supply area that uses a large flow rate, such as a bath, the burner capacity can be automatically switched to high capacity using the water flow sensor. This has the effect that it is much easier to use than the conventional device in which the switching of the capacity is performed manually. Furthermore, when hot water is simultaneously supplied to a hot water supply location that uses a small flow rate and a hot water supply location that uses a large flow rate, it has the effect that hot water of the same temperature can be supplied to both locations.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing one example of implementing the present invention, FIG. 2 is a schematic diagram showing another embodiment of the present invention, and FIG. 3 is a schematic diagram showing still another embodiment of the present invention. . 2... Heat exchanger, 3... Burner, 4a, 4b,
4c...Hot water supply path, 9...Water flow sensor.

Claims (1)

[Scope of utility model registration request] In a device that is equipped with one heat exchanger and a burner whose heating capacity can be switched freely, and supplies hot water obtained through the heat exchanger to multiple locations such as the kitchen, bath, etc., the outlet of the heat exchanger A plurality of hot water supply paths for supplying hot water to the plurality of points are connected to the side, a water flow sensor is interposed in the hot water supply path to the hot water supply point using a large flow rate among the plurality of hot water supply paths, and the burner is controlled by the water flow sensor. A water heater characterized by being able to switch between a large capacity and a small capacity.