JPH0346739B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides an intermittent supply of hot water to a bathtub, a state in which hot water is supplied at a set temperature for bathing, and an additional state in which hot water is supplied at a set temperature higher than that. The present invention relates to a hot water supply device for a bath, which is provided with a hot water supply operation section that switches the hot water supply state between a hot water supply state and a hot water supply state, and is provided with a control device that automatically operates the hot water supply operation section based on a command from a human operation section.

[Prior art]

Conventionally, in the bath water heater, as shown in FIG. 3, after turning on the hot water pouring operation switch 15 provided in the remote controller 11 to start hot water supply at the set temperature for bathing, so-called hot water pouring, A timer TM is provided to automatically stop the pouring of hot water at a set time, and the temperature setting tool 16 and the timer operating time setting tool 18' are used to adjust the set temperature for bathing to a desired temperature, and the timer operating time is adjusted to a desired temperature. By setting the molten metal pouring operation switch 1 appropriately,
Filling the bathtub 5 with hot water can be completed automatically by simply turning ON the bathtub 5.

In the figure, 2 is a gas burner, 1 is a heat exchanger that heats water supplied from the water supply channel 7 by combustion in the gas burner 2, and 14' is a human command from the remote controller 11, a hot water temperature sensor 12, and , based on the information from the water supply detection sensor 13, automatically ignites and extinguishes the gas burner 2 in order to intermittent hot water supply and switch the hot water supply state between a hot water pouring state and a high temperature reheating state, and This is a control device that automatically operates the water supply control valve 8 and the fuel control valve 10.

[Problem that the invention seeks to solve]

However, with the above-mentioned conventional configuration, when automatically filling hot water using a timer, if there is already residual hot water in the bathtub when the hot water pouring operation switch is turned on, the bathtub will be filled when the water supply stops using the timer. In order for the stored water level to reach the desired full water level and for the stored water temperature to reach the desired boiling temperature, the operator must determine the amount and temperature of the remaining hot water in advance and take these into account. The operating time of the timer and the set temperature for bathing when hot water is supplied must be set in the same state, and the setting operations that involve these judgments are extremely complicated. or,
Because it is an artificial judgment, it is easy to cause incorrect settings.
As a result, the water level and temperature of the water stored when the timer stops supplying hot water are vastly different from the desired full water level and boiling temperature, and the water level and temperature must be adjusted again when taking a bath.
There was still room for improvement in terms of operability and automatic hot water filling performance.

An object of the present invention is to improve the automatic hot water filling control mode, and to solve the above-mentioned problem caused by residual hot water, which is an uncertain element, while maintaining a high level of safety.

[Means to solve the problem]

The characteristic configuration of the hot water supply device for a bath according to the present invention is that it is provided with a sensor that detects the level of water stored in the bathtub and a sensor that detects the temperature of the stored water, and supplies hot water to the bathtub intermittently, and also uses the hot water for bathing. A control device that automatically operates the hot water supply operation unit that switches the hot water supply state between pouring at a set temperature and reheating at a higher set temperature determines the storage state based on information from both sensors. Means for determining which of the following four states (a) to (d) is in: (a) A state in which the detected reservoir water level is less than the set low water level.

(b) A state in which the detected reservoir water level is higher than the set low water level and lower than the set full water level, and the detected reservoir water temperature is lower than the bath set temperature.

(c) A state in which the detected reservoir water level is equal to or higher than the preset low water level and lower than the preset full water level, and the detected reservoir water temperature is equal to or higher than the bath preset temperature.

(d) A state in which the detected storage water level is higher than the set full water level.

Based on the determination result by the determining means, the pouring state is executed when the state (a) and the state (c) are present, and the reheating state is executed when the state (b) is present. and, in order to stop the hot water supply when the above-mentioned state (d) is reached, an output means is provided for operating the hot water supply operation section from the time of receiving a hot water supply start command from the human operation section, and its operation. , the effects are as follows.

[Effect]

In other words, if there is even a small amount of hot water remaining in the bathtub at the time of starting hot water supply, first execute the reheating state to raise the temperature of the stored water to the set temperature for bathing, and then
If you continue pouring water until the reservoir water level reaches the set full water level, you can most easily fill with hot water at the desired full water level and the desired temperature. Since it is dangerous to discharge and supply hot water for fire-fighting, by adopting the control form described in the [Solution] section,
When the stored water level is less than the set low water level [state (A)] at the start of hot water supply, the hot water pouring state is first executed to automatically raise the stored water level to the set low water level at which the reheating state is safely possible.

Then, when the storage state is in state (b), depending on whether after the execution of the first hot water pouring state has been completed or whether the stored water level (residual hot water) is already higher than the set low water level at the time of starting hot water supply, By executing the reheating state, the temperature of the stored water is quickly raised to the set temperature for bathing, thereby eliminating the quantitative and temperature effects of the remaining hot water, which are uncertain factors, and then changing the storage state to (Ha). )
As the state changes, the hot water pouring state is executed again to raise the stored water level to the set full water level, and when the set full water level is reached [state (d)], hot water supply is automatically stopped.

〔Effect of the invention〕

As a result of the above, it is possible to eliminate the troublesome manual operations of manually determining the amount and temperature of remaining hot water, setting a timer for hot water supply time in anticipation of the remaining hot water condition, and setting the hot water temperature. Regardless of the situation, by simply issuing a command to start hot water supply, the system automatically fills the water in an ideal manner, with the stored water level appropriately matching the desired full water level, and the temperature of the boiling stored water appropriately matching the desired temperature. Moreover, it has been possible to provide a highly practical hot water supply device for baths that can be operated with high safety.

〔Example〕

Figure 1 shows the schematic structure of a bath water heater,
A heating section 3 equipped with a Finch-Ube type water heating heat exchanger 1 and a main gas burner 2 for heating it.
is installed outdoors, and the hot water supply pipe 4 of the heat exchanger 1 is installed outdoors.
is connected to a hot water discharge device 6 attached to the lower part of the bathtub 5, and the water supplied from the water supply channel 7 is heated to a predetermined temperature by the heating section 3 and is then discharged and supplied to the bathtub 5.

A water supply control valve 8 is installed in the water supply channel 7, and a fuel control valve 10 is installed in the fuel supply channel 9 for the main gas burner 2, respectively. Based on the hot water supply temperature information from the attached hot water temperature sensor 12 and the water supply information from the water flow detection sensor 13 attached to the water supply channel 7, the main gas burner 2 is ignited and extinguished, and both the control valves 8, A control device 14 is provided which automatically performs 10 operations, and is configured to produce hot water supply conditions as shown in (A) to (C) below.

(A) By turning ON the pouring operation switch 15 provided on the remote controller 11, the water supply control valve 8 is first opened and operated so that the water supply amount becomes a preset large flow rate for pouring hot water. .
Then, the fuel control valve 10 is opened based on the water supply start detection by the water flow detection sensor 13.
At the same time as the main gas burner 2 is ignited, information from the hot water temperature sensor 12 is sent so that the hot water temperature is maintained at the temperature T _L artificially set by the hot water temperature setting tool 16 provided in the remote controller 11. While feeding back the fuel control valve 10, the opening degree of the fuel control valve 10 is controlled and the heating capacity of the main burner 2 is automatically adjusted. Hot water supply at _L , that is, the pouring state continues.

(B) While there is water stored in the bathtub 5, by turning on the reheating operation switch 17 provided in the remote controller 11, the amount of water supplied becomes a preset small flow rate for reheating. The water supply control valve 8 is opened, and the fuel control valve 10 is opened based on the water supply start detection by the water flow detection sensor 13, as in the case (A) above.
At the same time, the main gas burner 2 is ignited. Then, while feeding back information from the hot water temperature sensor 12, the fuel control valve 10 is adjusted to the opening degree so as to maintain the hot water supply temperature at a high reheating temperature T _H that is fixedly set in advance, for example, 98°C. Controlled, reheating operation switch 1
Until 7 is turned off, hot water is supplied at a high temperature T _H for heating the water stored in the bathtub 5, that is,
The reheating condition continues.

(C) By turning on the automatic bath operation switch 18 provided on the remote controller 11, the above-mentioned (A) pouring state and (B) reheating state are alternately and automatically performed. Finally, the water level stored in the bathtub 5 reaches almost the set full water level WL ₂ .
In addition, when the temperature of the stored water separately detected by the sensor 21 reaches the set temperature T _L for bathing set by the temperature setting tool 16, the hot water supply is automatically stopped. In other words, the hot water filling operation for bathing is performed on all automatic bath operation switches 18.
This is done automatically with just the ON operation.

To explain the control configuration for automatic bath operation in the above (C), when the water level of the water stored in the bathtub is higher than the discharge port 6 at the bottom of the bathtub 5, A first water level switch 19 that is turned on when the stored water level is higher than the set low water level WL ₁ that allows hot water to be discharged safely is attached, and a switch 19 is installed at the top of the bathtub 5 to ensure that the water level of the stored water in the bathtub is suitable for bathing. A second water level switch 20 that turns on when the water level is higher than the set full water level WL ₂ is attached, and a sensor 21 that detects the temperature T of the water stored in the bathtub 5 is also attached inside the bathtub. The automatic bath operation switch 18 is automatically controlled by the control device 14 based on information from the water level switches 19 and 20 and the stored water temperature sensor 21.
From the time of ON operation, the following 1st to 4th modes (
~) are configured to be executed preferentially in that order. (See Figure 2) () 1st mode...1st water level switch 19 is OFF
If it is in the ON state, perform the same pouring state as in (A) above until it becomes the ON state.

() Second mode... Continuing the execution of the first mode (), or automatic bath operation switch 18
At the time of the ON operation, the first water level switch 19 was already turned on.
If it is in the ON state, the second mode () is omitted, and the reheating state similar to the above-mentioned (B) is executed until the temperature T detected by the stored water temperature sensor 21 reaches the set temperature T _L for bathing. .

() Third mode: After the execution of the second mode () is completed, the pouring state is executed again in the same way as the first mode () described above until the second water level switch 20 is turned on.

() 4th mode...After the execution of the 3rd mode () is completed, the temperature T detected by the stored water temperature sensor 21
The above-mentioned _second temperature is
After executing the reheating state similar to mode () again, the hot water supply operation is stopped. Furthermore, if the temperature T detected by the stored water temperature sensor 21 is already equal to or higher than the bathing set temperature T _L at the time when the execution of the third mode () is completed, the fourth mode () is omitted and the hot water supply operation is stopped.

In summary, in the first mode (), safety is ensured for subsequent addition, and in the second mode (), the effects on the temperature and water volume of the remaining hot water at the start of automatic operation are quickly resolved, In the third mode (), the setting full water level WL ₂ suitable for bathing is secured, and in the fourth mode ()
, the stored water, whose temperature has decreased due to natural heat dissipation during hot water supply, is quickly raised to the set temperature T _L for bathing while avoiding overflow, and finally the water is brought to almost the set full water level WL ₂ and at a temperature suitable for bathing. The full water condition of T _L can be obtained with high accuracy.

In the remote controller 11, reference numeral 22 in the figure is a time setting tool for a timer for issuing an automatic bath operation start command after a desired set time, and 23 is a time setting tool for digitally setting the manually set bathing temperature T _L. Display panel to display, and 24
is a digital timer.

[Another example]

Instead of making the set temperature T _L for bathing adjustable, it may be set to a fixed temperature, or the set temperature T _H for reheating may be made adjustable.

The fourth mode () may be omitted in the automatic bath operation.

In order to detect whether the water level WL of the bathtub reservoir water is below the set low water level WL ₁ or whether it is below the set full water level WL ₃ , it is necessary to detect whether the water level WL of the bathtub reservoir water is below the set low water level WL 1 or below, as in the above embodiment. Separate water level switches 19 and 20 that turn ON when the water level reaches WL ₁ and WL ₂
Instead of using , one water level sensor is installed that continuously detects the storage water level WL, and based on the detection result, it is determined whether the storage water level WL is below the set low water level WL ₁ and the set full water level. Various water level detection configurations can be adopted, such as determining whether the water level is below WL ₃ , and these water level detection configurations are collectively referred to as water level sensors 19 and 20.

Further, in the control device 14, the water level sensor 1
9, 20, and a specific circuit configuration for determining the storage state in terms of water level and temperature based on information from the stored water temperature sensor 21, and based on the determination results, from each control valve 8, 10, etc. The specific output circuit configuration for automatically operating the hot water supply operation unit consisting of
Various configuration changes are possible for each, and these circuit configurations are collectively referred to as the determining means 14A and the output means 1.
It is called 4B.

The set full water level WL ₂ may be artificially changed as appropriate.

Furthermore, the water from the water supply channel 17 is heated to fill the bathtub 5.
Various improvements can also be made to the specific configuration of the heating section 3 for discharging and supplying the liquid.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention, with FIG. 1 being a schematic overall system diagram and FIG. 2 being a flow sheet for automatic bath operation. FIG. 3 is a schematic overall system diagram showing a conventional example. 5... Bathtub, 8, 10... Hot water supply operation section, 11...
...Human operation unit, 14...Control device, 14A...Discrimination means, 14B...Output means, 19, 20...Water level sensor, 21...Reserved water temperature sensor, T _L
... Set temperature for bathing, T _H ... Set temperature for reheating,
T...Detected temperature, WL ₁ ...Set low water level, WL ₂ ...
...Setting full water level, WL...Detected storage water level.

Claims (1)

[Scope of Claims] 1 Hot water supply to the bathtub 5 is intermittent, and the hot water supply state is divided into a hot water pouring state in which hot water is supplied at a set temperature T _L for bathing, and a hot water supply state in which hot water is supplied at a higher set temperature T _H than the hot water supply state. This hot water supply device for a bath is provided with hot water supply operating units 8 and 10 for switching between the hot water supply operating units 8 and 10, and a control device 14 that automatically operates the hot water supply operating units 8 and 10 based on a command from a human operating unit 11. Sensors 19, 20 for detecting the reservoir water level and sensor 21 for detecting the temperature of the reservoir water are provided, and based on the information from both sensors 19, 20, 21, the reservoir state is in the following four states (a) to (a). (d) Means 14A for determining whether the state is in (a) the state in which the detected reservoir water level WL is less than the set low water level WL ₁ ; (b) A state in which the detected reservoir water level WL is greater than or equal to the set low water level WL ₁ and less than the set full water level WL ₂ , and the detected reservoir water temperature T is less than the bathing set temperature T _L. (c) A state in which the detected stored water WL is equal to or higher than the set low water level WL ₁ and lower than the set full water level WL ₂ , and the detected stored water temperature T is equal to or higher than the set temperature T _L for bathing. (d) A state in which the detected storage water level WL is equal to or higher than the set full water level WL ₂ . Based on the determination result by the determining means 14A, the pouring state is executed when the state (A) and the state (C) are present, and the reheating state is executed when the state (B) is present. In addition, the control device controls the output means 14B for operating the hot water supply operation sections 8 and 10 from the time of receiving the hot water supply start command from the human operation section 11 so as to stop the hot water supply when the above-mentioned state (d) is reached. Bath water heater installed in 14th. 2. The determining means 14A is means for determining the (e) state in which the detected stored water temperature T is less than the bathing set temperature T _L in the (d) state, and the output means 14B is a means for determining the (e) state in which the detected stored water temperature T is less than the bathing set temperature T L 2. The hot water supply device for a bath according to claim 1, further comprising means for operating the hot water supply operation units 8, 10 so as to execute the reheating state with priority over stopping the hot water supply when the hot water supply is in this state.