JPH0451737B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Application and Overview) The present invention relates to a multi-point water heater that supplies hot water to a kitchen and a bath, and particularly to a temperature control device thereof. When hot water is used at a hot water supply location with a high priority (priority side), a notification is made that the hot water supply location with a low priority (non-priority side) has reached a high temperature setting state, so that the set temperature on the priority side This is to preliminarily notify that the hot water temperature will temporarily become high even though the temperature is low, and this prevents the inconvenience of using unexpectedly high temperature hot water on the priority side. It is intended to prevent

(Prior art and its problems) A water heater that supplies hot water to multiple locations and that can be remotely controlled has already been developed since 1983.
It is disclosed in Publication No. 23088.

In this conventional method, as shown in Figs. 5 and 6,
In addition to incorporating proportional control valve B into water heater A,
Remote temperature controllers 1 and 2 are provided at each of the two hot water supply points, and the hot water temperature can be adjusted from either of these remote temperature controllers. , and a hot water temperature adjustment knob 1 associated with the hot water temperature setting circuits 10 and 20.
2 or 22 are arranged separately.

Among these, one remote temperature controller 1 is arranged on the priority side, and this remote temperature controller 1 is provided with a changeover switch 13.

In this case, when hot water is used on the priority side, when the changeover switch 13 is switched to the ON side, only the hot water temperature setting circuit 10 on the priority side becomes conductive, and by operating the hot water temperature adjustment knob 12, it is connected to the proportional control valve B. You can adjust the hot water temperature (hot water temperature setting) with the related settings. As a result, the indicator lamp 11 of the remote temperature controller 1 on the priority side lights up, and the indicator lamp 31 on the other non-priority side changes from the lit state to the off state, or remains in the off state. It becomes clear that the hot water temperature is being adjusted by the remote temperature controller 1 on the priority side. Furthermore, no matter how the hot water temperature used on the non-priority side is set, the hot water temperature set by the remote temperature controller 1 on the priority side takes precedence. Therefore, when this priority side is used as a shower, even if the hot water temperature is set to a high temperature at another hot water supply location, when using the shower, the changeover switch 13 and associated hot water temperature adjustment knob 12 can be operated. , the hot water temperature will be set to an appropriate temperature.

However, even with this conventional system, when using the shower at the shower installation part as the priority side, even if the changeover switch 13 is operated and the hot water temperature adjustment knob 12 is operated, the outlet hot water temperature is set to a temperature suitable for the shower. Even if the setting is set to 1, hot water may temporarily come out and cause burns.

This happens after performing the above operation while high-temperature hot water is being used in the non-priority kitchen.
This is because even if the shower is opened, a certain amount of time is required for the temperature of hot water discharged from the shower to reach the set temperature on the priority side. Another reason is that it is not possible to predict that the set temperature on the kitchen side will be higher than the set temperature on the shower side when the shower is used.

(Technical Problem) The present invention aims to solve the above-mentioned problems by providing a remote temperature controller at each of a plurality of hot water supply points, allowing each remote temperature controller to set the hot water temperature separately, and In order to ensure the prevention of burn accidents due to unexpected hot water discharge when hot water is used at the priority hot water supply point, The technical problem is to be able to notify when the set temperature on the non-priority side is higher than that on the priority side.

(Means) The technical means of the present invention taken to solve the above technical problem is to ``compare the set temperature in the remote temperature controller on the priority side and the set temperature in the remote temperature controller on the non-priority side, Further, a comparison means is provided for outputting a predetermined drive signal under the condition that the latter set temperature is higher than the former set temperature by a certain temperature or more, and a notification means that is activated by the output of the comparison means is provided to the remote temperature controller on the priority side. ``It was established.''

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

When hot water is used on the priority side, the changeover switch is switched or the changeover switch is automatically switched, and only the hot water temperature setting circuit on the priority side becomes conductive. At this time, if the set temperature on the non-priority side is higher than that on the priority side by a certain temperature or more, a predetermined output signal is generated from the comparator, and this output activates the notification means provided on the priority side. Therefore, it can be predicted that unexpectedly high temperature water will come out from the non-priority side.

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

When using hot water on the priority side, if the set temperature on the non-priority side is higher than that on the priority side, you can predict this and avoid using unexpectedly high-temperature water. This prevents the inconvenience of tripping and prevents unexpected burns.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

In the embodiments shown in FIGS. 1 to 3, the same configuration as the conventional one is adopted as an electric circuit for temperature control, and as shown in FIGS. 1 and 2, the remote temperature controller 1 on the priority side The water temperature setting circuit 10 of the remote temperature controller 2 on the non-priority side is connected to the water temperature setting circuit 20 of the remote temperature controller 2 on the non-priority side via a flow switch 14 as a changeover switch 13, and the other contact of this flow switch 14 is an indicator lamp 21. connected to. Further, the setting outputs from the hot water temperature setting circuits 10 and 20 are input to the proportional control valve drive circuit b.

Further, the priority side remote temperature controller 1 is installed on the bathroom C side, and conversely, the non-priority side is installed on the kitchen side, and the remote temperature controller 1 is provided with a buzzer 17 as a notification means. ing. This buser 17 receives the output from the hot water temperature setting circuit 10 of the remote temperature controller 1 and the hot water temperature setting circuit 20 of the other remote temperature controller 2.
It is operated by the output from the comparator 3 which inputs the delayed output from the comparator 3. Therefore, the output from the hot water temperature setting circuit 20 is directly input to the proportional control valve drive circuit b, and is also input to the delay circuit 4. The delay circuit 4 has a configuration in which a capacitor 41 is connected to the high potential side of the hot water temperature setting circuit 20.

Further, as the comparator 3, a known circuit using an operational amplifier differential amplifier 31 and a comparator 32 is used, and corresponds to the difference between the voltage on the positive electrode side of the capacitor 41 and the output voltage of the hot water temperature setting circuits 10 and 20. The voltage is applied to the base of a switching transistor 18 connected in series with the buzzer 17.

The conditions under which this switching transistor 18 becomes conductive are set to a predetermined value by an adjustment resistor R inserted on the input side of the comparator 32.
The temperature difference set by each of the hot water temperature setting circuits 20 and 10 is a constant temperature (for example, the temperature difference 5 described above).
When the temperature difference exceeds 10°C), the output of the comparator 32 causes the switching transistor 1 to
8 is in a conductive state.

Next, the configuration of the gas circuit and water circuit is shown in Figure 2.
As shown in Fig. 3, a flow switch 14 is inserted in the hot water supply circuit to bathroom C, which is the priority side.
This becomes the changeover switch 13 described above.

In the case of the above embodiment, when the shower 15 is used or hot water is supplied to the bathtub 16, the flow switch 14 is switched and only the hot water temperature setting circuit 10 becomes conductive, and the hot water temperature is set on the priority side. Temperature controlled. At this time, if the set temperature of the remote temperature controller 2 is high and a certain temperature higher than the set temperature of the other remote temperature controller 1, a predetermined voltage is applied from the comparator 3 to the base of the switching transistor 18. When the voltage is applied, this switching transistor becomes conductive, and the buzzer 17 sounds.

Also, at this time, the display lamp 21 turns off, so
It becomes clear that the hot water temperature cannot be adjusted on the remote temperature controller 2 side.

Next, in the second embodiment shown in FIG.
1 is connected and the other electrode is grounded, so that the positive electrode side voltage of this capacitor 41 and the output voltage of the other hot water temperature setting device are input separately to the differential amplifier 30, and further, these differential amplifiers The output from 30 is applied to the base of a switching transistor 18 connected to the parallel circuit of buzzers 17,17. The buzzers 17 and 17 are respectively disposed on the remote temperature controllers 1 and 2, and in this case, the set temperature of the remote temperature controller that is turned on by the changeover switch 13 is the same as the set temperature of the other remote temperature controller. Buzzer 17 when the temperature is lower than that of the temperature controller.
will sound. It goes without saying that even in this case, the auxiliary resistor R is set to a predetermined value as in the first embodiment.

In the first embodiment described above, the flow switch 14 is installed in the bathroom C of the branch pipe 5 provided in the water heater A.
Plumbing work is easy because it is inserted into the hot water supply circuit that leads to the hot water supply circuit.

Further, in the above embodiment, the buzzer 17 is used as the notification means, but it is also possible to use other notification means such as a flicker lamp.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the first embodiment of the present invention, Fig. 2 is an electric circuit diagram thereof, Fig. 3 is an explanatory diagram showing the relationship between a bathtub and a water heater, and Fig. 4 is an electrical diagram of the second embodiment. The circuit diagram, FIG. 5, and FIG. 6 are explanatory diagrams of the conventional example, and in the figure, 1, 2... remote temperature controller, 10, 20... hot water temperature setting circuit, 12... hot water temperature adjustment knob, 13...
Changeover switch, 14...Flow switch, A...
Water heater, B...proportional control valve, C...bathroom.

Claims (1)

[Claims] 1. A remote temperature controller is installed at each of the multiple hot water supply points, and the hot water temperature can be set individually using each remote temperature controller, and the hot water temperature setting circuits in each remote temperature controller can be selectively switched between each other using a switch. The set temperature of the remote temperature controller on the priority side and the set temperature of the remote temperature controller on the non-priority side are compared, and the set temperature of the latter is a constant temperature higher than the set temperature of the former. A water heater for supplying hot water to a plurality of locations, the remote temperature controller on the priority side being provided with a comparison means for outputting a predetermined drive signal under the above-mentioned high conditions, and a notification means that is activated by the output of the comparison means on the priority side remote temperature controller.