JPH0264354A - Hot water supply temperature control method in automatic bath boiler with hot water supply apparatus - Google Patents

Abstract

PURPOSE:To avoid a danger of having a burn even when the temperature of a bath is set at a high temperature, and to carry out hot water filling to the bath and hot water supply to an another faucet simultaneously, by comparing the set bath temperature with the set hot water supply temperature that is set by a remote controller when hot water supply is carried out during hot water is being fed to the bath. CONSTITUTION:When an auto-switch is turned on, solenoid valves 16 and 9 (or 16, 8, and 9) are opened and simultaneously a pump 7 is operated to supply hot water to a hopper 10 at a set bath temperature. At this time, a flow switch 19 provided on a hot water supply pipe 13 detects whether water flow is present along the hot water supply pipe or not, and when no water flow is detected, hot water at the set bath temperature is supplied to the bath through an additional heating circulating pipeline 5 (or 5 and 6), that is automatic hot water filling operation is effected. Like this, when an another hot water faucet (shower) is opened during automatic hot water filling, the flow switch 9 turns on and detects it, and the set hot water supply temperature that is set by a remote controller is compared with the set bath temperature. When the set bath temperature is lower than the set hot water supply temperature, hot water is supplied at the set bath temperature, and when the set bath temperature is higher than the set hot water supply temperature, hot water is supplied at the set hot water supply temperature.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to hot water supply temperature control when filling a bathtub with hot water and supplying hot water from another hot water faucet at the same time in an automatic bath device with a water heater for home use. It is about the method.

[Conventional technology]

The automatic bath system with water heater is constructed as shown in FIG.

In FIG. 4, reference numeral 1 denotes an appliance main body, which houses a hot water supply heat exchanger 2 and a reheating heat exchanger 3. The bathtub 4 and the heat exchanger 3 for reheating, which are installed at a position apart from the top of the appliance body, are connected via an outgoing pipe 5 and a return pipe 6 for circulating reheating, and the return pipe 6 A pump 7 and a solenoid valve 8 are disposed therein, and a conduit 11 from a hopper 10 having a solenoid valve 9 is connected between the pump 7 and the solenoid valve 8.

When the solenoid valve 9 is closed, the solenoid valve 8 is opened, and the pump 7 is operated, a reheating circulation operation via the reheating heat exchanger 3 can be performed.

A water supply pipe 12 and a hot water supply pipe 13 are connected to the hot water supply heat exchanger 2, a flow rate sensor 14 is provided on the water supply pipe 12, and a branch pipe 15 for filling hot water is branched from the hot water supply pipe 13 to connect the hopper 10. A solenoid valve 16 is installed at the outlet of the branch pipe 15.
The solenoid valves 16, 9 and 8 are opened, and the pump 7 is opened.
When 5. When the flow rate sensor 14 detects that the amount of hot water filled into the bathtub has reached the set value, the solenoid valve 1
6 is closed to automatically stop the filling of hot water.

Note that the branch pipe 15 is equipped with a flow rate sensor 18,
While filling the bathtub with hot water, other hot water taps such as shower 1
7 is used, the amount of hot water filled can be determined by subtracting the flow rate sensors 14 and 18. 1
9 is a running water switch installed in the hot water pipe.

Although not shown in the figure, this type of self-adjusting device is equipped with a microcomputer control section and a remote controller (abbreviated as remote control), and the microcomputer control section is equipped with a flow rate sensor 14, a pressure sensor. (not shown), water flow switch 19, temperature detector (not shown), etc., and based on these signals and instructions from the remote control, various solenoid valves are opened and closed, pumps are driven, and the pump is not shown. Although the burner is controlled, since these techniques are well known, a detailed explanation thereof will be omitted.

[Problem to be solved by the invention]

The automatic bath system with a water heater is configured to set the boiling temperature of the water in the bathtub and the temperature of hot water supplied from the hot water faucet using a remote control. If you use another hot water faucet, such as a shower, while the tub is in use, you will only be able to get hot water at the same temperature as the bathtub. For example, when the bathtub temperature is set to 38°C and automatic operation is performed, hot water at 38°C is produced by the hot water supply heat exchanger 2 and sent to the bathtub via the hopper 10 and the circulation pipe. For example, even if the hot water tap was opened with the Ik humidity temperature set at 42°C, only hot water of 38°C was obtained from the hot water tap.

This is because if the hot water outlet temperature is adjusted to the set water supply temperature, the bathtub temperature cannot be brought to the set temperature (if the water temperature rises, it cannot be made lukewarm).

Furthermore, in the above-mentioned conventional technology, hot water is supplied at the same temperature as the temperature at which hot water is filled into the bathtub, so if you use a shower when the bathtub temperature is set to a high temperature,
There was a risk of burns from the hot water coming out.

In addition, it is being considered that if there is an interruption in hot water supply, such as a shower, while the automatic operation is filling the bathtub with hot water, the automatic filling of the bathtub with hot water will be temporarily interrupted so that the desired hot water temperature can be obtained. However, if you do this, you cannot use them at the same time, so there is a problem that it takes a long time to fill the water.

The present invention improves the problems of the prior art as described above, and there is no risk of burns even when the bathtub temperature is set to a high temperature, and
It is an object of the present invention to provide a hot water supply temperature control method that can simultaneously fill a bathtub with hot water and supply hot water from another hot water tap.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention compares the hot water supply temperature with the bathtub set temperature set on the remote control when the hot water supply operation is performed while the bathtub is being filled with hot water, and sets the hot water supply temperature according to the bathtub set temperature. It is characterized in that when the temperature is low, priority is given to the hot water supply temperature setting, and in the opposite case, priority is given to the bathtub temperature setting.

[Effect]

Since the present invention controls the hot water supply temperature in the manner described above, when a temperature lower than the bathtub set temperature is set and the shower faucet is opened during automatic hot water filling of the bathtub, - the hot water supply set temperature is given priority and the desired temperature is set. Temperature hot water can be obtained. In that case, the temperature at which the hot water is filled into the bathtub will temporarily drop to the hot water supply temperature, but in this type of device, after the hot water is filled to the desired level, the reheating heat exchanger will normally heat the bathtub to the set temperature. Therefore, a temporary drop in the filling temperature is not a problem at all. Conversely, if the hot water supply temperature is higher than the bathtub temperature, hot water at the bathtub temperature will be dispensed from the shower, and although hot water at the desired temperature cannot be obtained, it can be used safely and automatic operation is possible. Since it does not stop, the time until it boils can be minimized.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is a flowchart showing the control method of the present invention, and FIG.
FIG. 3 and FIG. 3 are explanatory diagrams showing the relationship between the bathtub temperature setting and the hot water supply temperature.

As shown in FIG. 1, when the automatic switch is turned on, the solenoid valve 16.9 (or 16.8.9) is opened and the pump 7 is driven to supply hot water at the bathtub set temperature into the hopper 10. At that time, the running water switch 19 installed in the hot water pipe 13
detects the presence or absence of running water in the hot water supply pipe, and when it detects that there is no running water, hot water at the bathtub set temperature is supplied to the bathtub via the reheating circulation pipe 5 (or 5 and 6) and automatic hot water filling is performed. Do this.

If you open another hot water tap (shower) while automatic hot water filling is being performed in this way, the running water switch 19 turns on and detects this, and compares the hot water set temperature set on the remote control with the bathtub set temperature. When the set temperature of the bathtub is lower than the set temperature for hot water supply, hot water is dispensed at the set temperature of the bathtub, and when the set temperature of the bathtub is higher than the set temperature for hot water supply, hot water is dispensed at the set temperature for hot water supply.

This relationship is shown in FIGS. 2 and 3. For example, as shown in Fig. 2, while the bathtub temperature is set to 42°C on the remote control 20 and automatic hot water filling is being performed,
When the shower 17 is used with the hot water supply temperature set to 38°C, the appliance 1 is controlled so that the hot water temperature is 38°C, and the bathtub 4 is temporarily filled with hot water at 38°C and the shower 17 is heated. When you stop using the shower 17, the water switch 19 detects this and controls the appliance 1 so that the hot water temperature reaches the bathtub setting temperature of 42°C, and then automatically returns to 42°C. Perform tension.

Furthermore, as shown in Fig. 3, if the hot water supply temperature on the remote control is set to 42°C and a shower is used while the bathtub temperature is set to 38°C and automatic hot water filling is being performed, the appliance 1 Prioritize the set temperature and shower from 17 to 38 degrees Celsius
The bath is served at

〔Effect of the invention〕

As mentioned above, if you set the hot water supply temperature lower than the bathtub setting temperature and use a shower etc. while the bathtub is automatically filled with hot water, there is a risk that the hot water will come out hotter than the hot water setting temperature with the conventional method. According to the invention, the above-mentioned fear is eliminated by prioritizing the hot water supply temperature setting, and in the reverse case, the shower user can obtain hot water at least at the bathtub setting temperature and use it safely. Moreover, since the hot water continues to be filled automatically even when the hot water tap is in use, the time it takes for the water to reach boiling point can be minimized.

[Brief explanation of the drawing]

Fig. 1 is a flowchart showing the hot water supply setting temperature control method according to the present invention, Figs. 2 and 3 are explanatory diagrams showing different hot water supply states, and Fig. 4 is a water system showing the overall configuration of an automatic bath device with a water heater. It is a diagram. 1... Appliance, 2... Heat exchanger for hot water supply, 3... Heat exchanger for reheating, 4... Bathtub, 5... Outgoing pipe for circulating reheating, 6
...Same return pipe, 7..Pump, 8,9.16..Solenoid valve, 10..Hopper, 12..Water supply pipe, 13..
...Hot water pipe, 14.18...Flow rate sensor, 15...
Branch pipe, 17...Shower, 19...Water switch, 20...Remote control 6 Figure 1 Figure 1 Cause

Claims (1)

[Claims] 1. The appliance body is equipped with a hot water supply heat exchanger and a reheating heat exchanger, and hot water heated by the hot water supply heat exchanger is filled into the bathtub via a circulating reheating pipe, In an automatic bath system with a water heater that automatically stops filling water when the amount of hot water reaches a set value, if the hot water supply operation is performed while the bathtub is being filled with hot water, the bathtub temperature set on the remote control and hot water supply will be changed. A hot water supply temperature control method in a bathtub with hot water supply, characterized by comparing the hot water supply temperature with a set temperature, and giving priority to the hot water supply temperature if the hot water supply temperature is lower than the bathtub temperature, and giving priority to the bathtub temperature if it is higher. .