JPS6231813Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an instantaneous water heater for centralized hot water supply. Hot water uses at home include style bathing, Japanese-style bathing (filling the bathtub with hot water, then heating the water in the bathtub and bathing with that water), shower bathing, There are tasks such as washing the toilet, washing hands, washing dishes, wiping, and washing clothes, and the appropriate temperature and desired outflow rate for each one are different, and the reality is that these hot water supplies are sometimes performed at two or three locations at the same time.

Conventional centralized water heaters, whether instantaneous or storage, often use a high-capacity water heater to supply hot water at a constant flow rate, and mix it with cold water depending on the usage. In this type of hot water supply method, not only do all hot water taps have to be mixed taps in order to satisfy the usage conditions mentioned above, but also for applications where a relatively low temperature and a small amount is sufficient, for example when washing the sink or washing hands. Then gas and water become uneconomical.

With this invention, when one of the hot water taps with different amounts of hot water is opened, it is not affected by the operation of the other hot water taps, in other words, even when used simultaneously, it can be used alone. The present invention provides a hot water supply device that can obtain any desired amount of hot water from the hot water supply faucet, and can also heat the bath water in the above-mentioned Japanese style bathing.

An embodiment of the present invention will be described below based on the drawings.

Figures 1 to 4 show an example of a water heater in which two sets of water heaters are housed in one casing; Figure 1 is a schematic configuration diagram of the same device; Figures 2 to 4 are It is a hot water supply and steam delivery system path diagram for explaining the action of the same device.

In these figures, 1 is the housing of the water heater;
It houses two sets of instantaneous water heaters A and B equipped with heat absorption parts 2 and 6 and burners 3 and 7, as well as the necessary gas supply mechanism, water supply and hot water supply mechanism, steam delivery mechanism, and electrical control mechanism. are doing. The burners 3 and 7 are introduced into the enclosure 1 by a gas supply pipe 10 from the same gas supply source, and are connected to a gas governor 5, respectively.
9 and a branch pipe with automatic gas valves 4 and 8 interposed therein. Note that this gas supply mechanism is the same as a normal instantaneous water heater, and includes a burner ignition device and a flame monitoring device (not shown). The water supply mechanism includes a water supply pipe 11, branch water pipes 13 and 14 branched from the water supply pipe 11, hot water supply pipes 17 and 18 led out from the heat absorption parts 2 and 6, and a hot water supply pipe 19 downstream of the hot water supply pipe 18, Hot water pipe 1
7, 18, a flowing water switch 12 interposed in the water supply pipe 11, flow rate sensors 15, 16 interposed in the branch water pipes 13, 14, respectively, and the hot water supply pipes 17, 18. They each include water temperature sensors 20 and 21, and these mechanisms are also used in ordinary instantaneous water heaters. E is an electromagnetic on-off valve interposed between the communication pipe 22, F is an electromagnetic on-off valve interposed between the hot water supply pipes 17 and 19, and G is an electromagnetic on-off valve interposed between the hot water supply pipes 18.
An electromagnetic on-off valve (hereinafter simply referred to as an on-off valve) interposed between the hot water taps can be opened and closed in conjunction with the operation of the hot water taps a and b at different places where hot water is used, or by remote control via the automatic controller 25 as described below. Ru. The steam delivery mechanism includes a steam delivery pipe 23 branched from the hot water supply pipe 19 downstream of the connection part of the hot water supply pipe 17 with the communication pipe 22, and an electromagnetic on-off valve H (hereinafter simply referred to as the on-off valve) interposed therein. It is connected to a steam discharge pipe 24 attached to the bathtub D.

25 is an automatic gas valve 4, based on the opening/closing of the on-off valves E to H, and detection signals of the water flow switch 12, flow rate sensors 15, 16, and hot water temperature sensors 20, 21.
This is an automatic controller that opens and closes the automatic gas valves 4 and 8 and adjusts the amount of gas passing through the automatic gas valves 4 and 8 in accordance with selected set values.

Next, the operation of the embodiment having the above-mentioned configuration will be explained. For convenience of explanation, it is assumed that the capacity of water heater A is No. 13, the capacity of water heater B is No. 5, and hot water tap a is installed in the bathroom. It is assumed that the hot water supply to this can be switched between the bathtub and the shower at the hot water outlet, and the hot water faucet b is located in the kitchen.

First, if you want to take a bath or shower, set the water temperature using the remote control unit in the bathroom, close on-off valves E, G, and H, open on-off valve F, and then turn on the hot water tap a. open. Then,
A flow of water occurs in the water supply pipe 11, the branch water pipe 13, and the hot water supply pipes 17 and 19, thereby causing the water flow switch 12
operates, automatic gas valve 4 opens, and gas flows to burner 3.
burner 3 by an ignition means (not shown).
starts combustion, only water heater A operates, and hot water with capacity of No. 13 is obtained at hot water tap a. At this time,
The flow rate sensor 15 detects the amount of hot water dispensed by the hot water tap a, and the hot water temperature sensor 20 detects the temperature of the hot water, and the controller 25 adjusts the combustion amount of the burner 3 so that hot water is supplied at the desired temperature with the desired amount of hot water. Adjust. In this case, the water supply system path is shown by the solid line arrow in FIG.

Next, if you want to wash the dishes, set the water temperature using the remote control in the kitchen, and turn on/off valve E.
and F, and after opening the on-off valve G, open the hot water tap b. Then, the various components operate in the same way as in the case described above, and only the water heater B operates, and hot water with a capacity of No. 5 comes out from the hot water tap b. In this case, the water supply system path is shown by the broken line arrow in FIG.

As explained above, by closing the on-off valve E, hot water is supplied based on the operation of the independent water heaters A and B only through the system to which the water heaters belong, so the hot water taps a and b are opened at the same time. If you close the taps, you can use both hot water taps at the same time.

Next, if you want to fill the bathtub with hot water in a short time, such as when taking a Western-style bath, set the desired water temperature using the remote control unit in the bathroom, close the on-off valves G and H, and close the on-off valves E and F. After performing the opening operation, open the hot water tap a. Then, the water flow switch 12 is activated, and both water heaters A and B are activated through the above-mentioned startup process, allowing hot water to be poured into the bathtub at the combined capacity, that is, the hot water of No. 18 capacity. In this case, the water supply system path is as shown in FIG. 3 by solid line arrows.

If you want to heat the bath water for Japanese-style bathing,
Set the remote control in the bathroom to "steam" (this will bring the water supply to the minimum flow rate), close all other on-off valves, and open only on-off valve H. Then, the water heater A operates in exactly the same way as in the case of hot water supply, heating the supplied water with the capacity of No. 13 to steam, which is discharged from the steam discharge pipe 24 and lowered to the temperature inside the bathtub D. Ivy will now heat the bath water. The steam delivery system in this case is as shown by the solid arrow in FIG. Moreover, if the steam delivery pipe 23 is not branched from the hot water supply pipe 17 of water heater A but is branched from the hot water supply pipe 18 of water heater B, the bath water can be heated with steam at the capacity of No. 5 in the same manner as above. become. According to this, although the capacity is small, the heating action is quiet.

As described above, the hot water supply device of the present invention is capable of supplying any desired amount of hot water by opening one of the plurality of hot water taps, regardless of the operation of the other hot water taps. Not only can hot water be used individually or simultaneously, hot water that combines the capacities of multiple water heaters can be obtained from a single hot water tap, and it is also possible to heat bath water with steam. It is extremely practical in centralized hot water supply, and at the same time contributes to energy conservation.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of a hot water supply apparatus according to the present invention, and FIGS. 2 to 4 are hot water supply/steam delivery system diagrams illustrating the same operation. 1... Enclosure, 2, 6... Heat absorption part, 3, 7... Burner, 4, 8... Automatic gas valve, 5, 9... Gas governor, 10... Gas supply pipe, 11... Water supply pipe, 1
2... Flowing water switch, 13, 14... Branch water pipe,
15, 16...Flow rate sensor, 17, 18, 19...
...Hot water pipe, 20, 21...Water temperature sensor, 22...
Communication pipe, 23... Steam delivery pipe, 24... Steam discharge pipe, 25... Automatic controller, A, B... Water heater,
D... Bathtub, E, F, G, H... Solenoid on/off valve,
a, b...Hot water tap.

Claims (1)

[Scope of utility model registration request] A plurality of water heaters having different capacities to be supplied with water from a common water supply pipe are arranged side by side in the enclosure, hot water supply pipes are led out from each of the water heaters, and the respective hot water supply pipes are connected with each other by a connecting pipe, An electromagnetic on-off valve is interposed in each of the hot water supply pipes and the communication pipe, and another electromagnetic on-off valve is provided in one of the water supply pipes between the branch point with the communication pipe and the electromagnetic on-off valve of the hot water supply pipe. A steam delivery pipe equipped with a valve is connected, and a detection element consisting of a water flow switch, a flow rate sensor, and a hot water temperature sensor for automatically controlling the operation of the water heater is interposed in the water supply and hot water supply line, and each of the hot water supply lines is connected. Equipped with an automatic controller that can remotely control the opening and closing of the electromagnetic on-off valve based on the designation of the hot water supply system path from the piping destination or the command for steam heating, and the supply and stop of gas to the burners of each water heater. A central hot water supply device characterized by: