JP2734073B2 - Bath water heater and large hot water bath water heater - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath water heater and a hot water bath water heater having an automatic hot water supply function for automatically supplying hot water to a bathtub.

2. Description of the Related Art Conventionally, bath water heaters of this type include a water level detection method for detecting a water level poured from a water heater to a bathtub and a pouring water detection method for detecting an amount of water poured from a water heater to a bathtub. , Each had an independent configuration.

That is, in FIG. 16, during the automatic hot water filling operation to the bathtub 19 in the water level detection method, when the automatic hot water filling switch 28 is turned “ON”, the control means 26 causes the automatic hot water supply opening / closing valve 10 to be “open” and the water supply connection port When the water flow detector 3 reaches the ignition water level, the water flowing from the control means 26 receives this signal.
Opens the gas solenoid valve 4 and the gas control valve 5, and ignites the hot water supply burner 6. The hot water heated by the hot water supply heat exchanger 7 is supplied from an automatic hot water supply / water supply unit 11 through an automatic hot water supply opening / closing valve 10 into a tank 12 for connection with water supply. Here, the three-way valve 13 is switched to the tank 12 side by the control means 26, the pump 14 is operated, and the hot water in the tank 12 is supplied to the water flow switch 15, the reheating heat exchanger 16, the outflow pipe 17, the bathtub adapter 18 and the like. Through the tub
Hot water is supplied to 19. The water level in the tank 12 is
Is controlled to keep it at a constant level. A water level sensor 23 is provided between the three-way valve 13 and the return pipe 21. The water level (pressure) poured into the bathtub 19 is detected through the return pipe 21 to convert the pressure into a voltage signal. The control means 26, on the other hand, automatically fills the hot water to the set water level by comparing it with the voltage value of the water level set by the water level setting device 29 of the controller 27. Further, when the water level in the bathtub falls to a certain constant water level, the same operation as described above is performed to provide a hot water function for keeping the set water level. Further, the three-way valve 13 and the pump 14 are operated to detect the temperature of the hot water in the bathtub 19 at certain time intervals, and the temperature detector 31 is operated.
And a set temperature of the temperature setter 30 by the controller 26 to compare the set temperature with the set temperature. In FIG. 17, the automatic hot water filling switch 28 is turned “ON” during the automatic hot water filling operation to the bathtub 19 in the hot water detection method.
Then, when the automatic hot water supply on-off valve 10 is opened by the control means 26 and the three-way valve 13 is switched to the automatic hot water filling side, the water flowing in from the water supply connection port 2 becomes the ignition water amount when the water amount detector 3 reaches the ignition water amount. Upon receiving the signal, the control means 26 opens the gas solenoid valve 4 and the gas control valve 5, and ignites the hot water supply burner 6. The hot water heated by the hot water supply heat exchanger 7 passes through an automatic hot water supply / opening section 11 through an automatic hot water supply opening / closing valve 10, a vacuum breaker 12 for bordering with water, a water quantity sensor 24 for detecting the amount of pouring water, and a three-way sensor. Valve 13 ~ Water flow switch 15 ~ Pump 14 ~ Heat exchanger for reheating 16 ~ Outgoing pipe 17
-Hot water is supplied to the bathtub 19 via the bathtub adapter 18. Here, the control means 26 compares the water amount signal from the water amount sensor 24 with the water amount value set by the water amount setting device 29 of the controller 27 and automatically fills the hot water to the set water amount. Although it has a warming function that operates to maintain the set temperature as described in the water level detection method, it does not have a hot water function.

Problems to be Solved by the Invention However, in the case of the water level detection system having the above configuration, the automatic hot water filling is performed by the outflow pipe 17 and the water level detection is performed by the return pipe 21. There were challenges.
In addition, in the case of the water amount detection method, the hot water cannot be added when the hot water in the bathtub is reduced, and when the automatic hot water filling operation is performed when there is remaining hot water in the bathtub, the amount of water will increase accordingly. The water setting had to be changed. If the above operation is not performed, there is a problem such as overflow from the bathtub.

The present invention solves the above-mentioned conventional problems, and determines the size of a bathtub by using a water level detecting means and a water amount detecting means in combination to determine a required pouring amount for a set water level and pouring the water to detect a water level. Eliminating downtime during operation, reducing the time for automatic hot water filling,
The purpose of the present invention is to make hot water when the amount of hot water in the bathtub decreases, and to enable automatic hot water filling operation even when there is residual hot water in the bathtub. It is another object of the present invention to use a return pipe for hot water filling to further reduce the time for automatic hot water filling.

Means for Solving the Problems To achieve the above object, a first technical means of the present invention is to provide an automatic hot water supply switch for turning on and off an automatic hot water supply opening / closing valve for automatically supplying hot water to a bathtub, and a water heater. Water level detecting means for detecting the level of water poured from the hot water into the bathtub, and pouring water detecting means for detecting the amount of hot water poured into the bathtub from the water heater,
The water level detection means, and a comparison operation storage means for inputting and comparing a water level signal and a pouring signal from the pouring water detection means to compare and calculate a water amount per water level of the bathtub; If there is stored data in the means, the system is provided with means for pouring by the pouring detecting means, and when there is no stored data in the comparison operation storing means, means for pouring by the water level detecting means.

In addition, the second means checks the remaining hot water in the bathtub. When the water level sensor output is equal to or lower than the water level reference value storage (V1), the water is detected by the water level detection means up to the water level sensor output V1. A means is provided for pouring the molten metal by the detecting means.

The third means is that when there is remaining hot water in the bathtub, the water level sensor output is equal to or higher than the water level reference value storage (V1), and the comparison operation storage means has stored data, the required pouring amount (Qx) = ｛set water level Water level sensor output at the time (V3) −current water level sensor output (Vx)｝ × water pouring amount per water level sensor output (Qx).

The fourth means is that when the water level sensor output is equal to or less than the water level reference value memory (V1), the bathtub water volume (Q
There is provided a means for pouring a small amount of water in 1), comparing with the set water level, and pouring again by the difference in water amount.

The fifth means is provided with a bypass valve between the outgoing pipe and the return pipe to the bathtub, and opens the bypass valve when pouring is performed by the pouring detecting means. When the pouring is performed by the water level detecting means, the bypass valve opens. A means for closing the valve is provided.

The sixth means includes means for "closing" the bypass valve while pouring in the hot water detecting means, detecting the water level in the water level detecting means, performing a comparison operation with the set water level, and automatically filling the hot water. .

In the above-described first means, when the size of the bathtub is not known due to a test run after the installation of the appliance or a power failure,
First, the water level is detected by the water level detection means, the amount of water per water level in the bathtub is compared and calculated, and the value is stored. From the next time, the hot water is automatically supplied by the pouring water detection means, thereby omitting the circulation mode for detecting the water level. The automatic hot water filling time can be shortened.

In the second means, it is determined whether there is remaining hot water based on the water level sensor output, and when the water level sensor output is equal to or less than V1,
Since the amount of remaining hot water is not known, the water level is detected by the water level detecting means until the output of the water sensor becomes V1. Thereafter, the required pouring amount is calculated by the first means, and then the adapter of the bathtub is calculated by the pouring water detecting means. Automatic hot water filling can be performed accurately regardless of the amount of remaining hot water.

In the third means, when there is remaining hot water in the bathtub, the water level sensor output is V1 or more, and the comparison operation storage means has stored data, the required pouring amount (Qx) = ｛the water level sensor output at the set water level ( V3)-Current water level sensor output (Vx)｝ × Pouring amount per water level sensor output (ΔQ) Calculate required pouring amount and pouring by pouring detecting means, accurate regardless of remaining hot water amount Automatic hot water filling is possible.

In the fourth means, as another means of the second means, when there is no remaining hot water in the bathtub (when the water level sensor output is V1 or less)
First, pouring water is reduced by the amount of water in the bathtub (Q1) to the bathtub adapter by the pouring detection means, and then compared with the set water level by the water level detecting means, and then poured again by the difference water amount As a result, accurate hot water filling can be performed regardless of the amount of remaining hot water up to the bathtub adapter.

In the fifth means, a bypass valve is provided between the outgoing pipe and the return pipe to the bathtub, and the bypass valve is "opened" when pouring is performed by the pouring detecting means, and when the pouring is performed by the water level detecting means, the bypass valve is opened. By making the valve “closed” and acting so as to satisfy the conditions of the pouring detecting means and the water level detecting means, the return pipe can also be used for pouring, so that the pouring amount can be increased and the automatic hot water filling time can be further reduced. .

In the sixth means, when there is no remaining hot water in the bathtub (when the water sensor output is less than V1), the bypass valve is opened and only the amount of water in the bathtub (Q1) to the bathtub adapter is set by the pouring detection means. By pouring a small amount of water and then comparing it with the set water level using the water level detection means and pouring it again by the amount of water difference, accurate automatic hot water filling regardless of the amount of remaining hot water up to the adapter in the bathtub In addition to this, automatic hot water filling time can be further reduced.

In the seventh means, a bypass valve is provided between the outgoing pipe and the return pipe to the bathtub, and when pouring is performed by the pouring detecting means, the bypass valve is opened, and when the water level is detected by the water level detecting means, the bypass valve is opened. By closing the bypass valve while pouring in the outgoing pipe, detecting the water level in the return pipe, performing a comparison operation with the set water level, and automatically filling the hot water, the circulation mode for detecting the water level can be omitted. Automatic hot water filling time can be further reduced.

Further, after completion of filling the bathtub, the water level in the bathtub is constantly monitored by the water level detecting means, and when the water level drops by a certain value from the set water level, the water can be automatically added to the set water level. .

If the set water level of the controller is set to a high level and there is no data stored in the comparison operation storage means,
By means, comparison operation storage of the water level and the pouring amount can be performed.

As a result, it becomes possible to shorten the time for automatically filling the bathtub with hot water and to add a hot water function. Further, it is not necessary to change the set water level of the controller depending on the state of the remaining hot water, so that a convenient appliance can be provided.

Examples Hereinafter, examples will be described with reference to the drawings. In addition,
The same parts as those in the conventional example are denoted by the same reference numerals, detailed description thereof will be omitted, and different parts will be mainly described.

In FIG. 1, reference numeral 24 denotes a water amount sensor for detecting the amount of pouring water into the bathtub, 23 denotes a water level sensor for detecting the level of pouring water into the bathtub,
Numeral 25 is a comparison operation storage means for comparing and storing the water level signal from the water level sensor 23 and the water amount signal from the water amount sensor 24. 26 is an automatic hot water filling control and water level,
A control means forming a part of the pouring signal comparison arithmetic storage means and the hot water supply control means, as shown by a dotted line in FIG. 1, to open the water amount detector 3, gas solenoid valve 4, gas control valve 5, and hot water tap 1. Hot water supply detector 9 to detect hot water usage when the amount of hot water exceeds a certain flow rate, automatic hot water supply opening / closing valve 10, three-way valve 13, pump 14, water flow switch 15, water level and pouring signal comparison arithmetic storage means 25, the controller 27, and the temperature detector 31 are connected. In the above embodiment, when the hot water tap 1 is opened, water enters from the water supply connection port 2, the water meter detector 3 detects this, and sends a signal to the controller 26, and the gas solenoid valve 4, the gas The control valve 5 is opened to ignite the hot water supply burner 6. The hot water heated by the hot water supply heat exchanger 7 is supplied from the hot water tap 1 through the hot water supply passage section 8 and the hot water supply use detector 9.

When the bathtub 19 is automatically filled with hot water, the following operation is performed. Water level in FIGS. 2 (a) and 2 (b)-water level sensor output-
A description will be given based on the water amount integrated water amount characteristic diagram and the flowchart of FIG. When the power supply is connected, first, the water level detecting means operates the automatic hot water filling mode, and when the water is filled to the return pipe 21 of the bathtub adapter 18, the water level is detected by the water level sensor 23 as a pressure change (S6 in FIG. 3). (Inflection point)>. Then, the three-way valve is switched so that the circulation circuit is filled with hot water. <S6 to S11 in FIGS. 2 and 3>, the water level reference value (H1) replaced with the output value of the water level sensor as the water level data of the bathtub.
= V1), at a certain water level Δh (H2 = V2), set water level (H3 =
As shown in FIG. 4, the water level integrated values Q1, Q2, and Q3 corresponding to V3) are input to the signals of the water level sensor 23 and the water level sensor 24, and are compared and calculated by the cooperation of the memory and the processor. -This is performed by the pouring comparison operation storage means 25.

Further, the control means 26 controls the three-way valve 13, the pump 14, the automatic hot water supply opening / closing valve 10, the hot water supply heating means 33, and the additional heating means 34, and also determines the water level setting and the temperature setting.

As described above, as shown in FIGS. 5 and 6, it is possible to automatically select whether to use the water level detecting means or the pouring water detecting means depending on the presence / absence of the water level / pouring comparison value. Also, depending on whether the water level sensor output is equal to or higher than V1, it is possible to select the operation without remaining hot water or the operation with remaining hot water. By filling the hot water with the pouring water detecting means, S13 to S in FIG.
Since 18 operations can be omitted, hot water filling time can be reduced.

In the operation with remaining hot water, the required pouring amount is calculated from the difference between the current water sensor output (Vx) and the water level sensor output at the set water level (V3) from the pouring amount per water level sensor output (ΔQ). Hot water can be poured by hot water detecting means. Here, if the steps S44 to S46 are omitted and the hot water is poured, the hot water filling time can be shortened.

FIGS. 7 and 8 show another embodiment of the remaining hot water mode operation, in which the water is poured by a small amount of water (Q1) from the bottom of the bathtub to V1 and then compared with the set water level by the water level detecting means. By pouring only the difference in the amount of water, the operation from S6 to S12 can be omitted, so the automatic hot water filling time can be further shortened, and accurate automatic hot water can be supplied regardless of the amount of remaining hot water up to the bathtub adapter. You can make hot water.

FIG. 9 to FIG. 10 are system diagrams having a bypass valve between the going pipe and the return pipe to the bathtub. When pouring is performed by the pouring detecting means, the bypass valve is opened and the water level detecting means is set. In the case of pouring, the bypass valve is operated to be "closed", so that S39 to S42 in FIG.
Up to H3, both the outgoing pipe and the return pipe can be used for hot water filling, so the amount of pouring can be increased and the time for automatic hot water filling can be further reduced.

FIGS. 12 to 13 show that when there is no remaining hot water in the bathtub (when the water level sensor output is V1 or less), the bypass valve is opened and the bath water amount to the bathtub adapter by the pouring detection means (Q1)
And then re-pour only the amount of water by the water level detection means, regardless of the amount of hot water remaining up to the adapter in the bathtub. Automatic hot water filling can be performed, and the time for automatic hot water filling can be further reduced.

In the operation with the remaining hot water, the required pouring amount is calculated from the difference between the current water level sensor output (Vx) and the water level sensor output (V3) at the set water level from the hot water amount per water level sensor output (ΔQ). Pouring by the pouring detection means,
Automatic hot water filling can be performed accurately regardless of the amount of remaining hot water, and the time required for automatic hot water filling can be reduced.

FIG. 14 to FIG. 15 show that a bypass valve is provided between an outgoing pipe and a return pipe to the bathtub, and when pouring is performed by the pouring detecting means, the bypass valve is opened and the water level is detected by the water level detecting means. In this case, close the bypass valve while pouring the water through the pipe,
By detecting the water level with the return pipe, performing a comparison operation with the set water level and performing automatic hot water filling, the circulation mode for detecting the water level can be omitted, so that the time for automatic hot water filling can be further reduced.

When there is no remaining hot water in the bathtub (when the water level sensor output is V1 or less), open the bypass valve and use the pouring detection means to pour water by the amount of bathtub water (Q1) up to the bathtub adapter, By comparing the set water level with the water level detection means and pouring the water again by the amount of the difference, accurate hot water filling can be performed regardless of the amount of remaining hot water up to the adapter in the bathtub, and automatic hot water filling can be performed. Time can be further reduced.

In the operation with the remaining hot water, the required pouring amount is calculated from the difference between the current water level sensor output (Vx) and the water level sensor output (V3) at the set water level from the hot water amount per water level sensor output (ΔQ). Pouring by the pouring detection means,
Automatic hot water filling can be performed accurately regardless of the amount of remaining hot water, and the time required for automatic hot water filling can be reduced. Where S82
If the hot water is poured while omitting S84, the hot water filling time can be further reduced.

Effect of the Invention As described above, in the bath water heater according to claim (1), the size of the bathtub is determined by using both the water level detecting means and the water amount detecting means, and the required pouring amount for the set water level is determined to perform pouring. This eliminates the pause time of the circulation mode for detecting the water level during the operation for detecting the water level, shortening the time of automatic hot water filling, and also at the time of test operation after installation of the equipment or power failure If you do not know the size of the bathtub, for example, when you have done so, first fill the bath with water level detection means, compare and calculate the amount of water per water level in the bathtub, store the value, and then use the automatic hot water detection means from next time. Can be stretched.

Further, in the bath water heater according to claim (2), it is determined whether or not there is remaining hot water based on the output of the water level sensor. When the output of the water level sensor is equal to or less than V1, the amount of the remaining hot water is not known. Until the water level reaches V1, and thereafter, the required pouring amount is calculated by the first means, and the pouring detecting means allows accurate pouring regardless of the amount of remaining hot water up to the adapter in the bathtub. Automatic hot water filling is possible.

In the bath water heater according to claim (3), if there is remaining hot water in the bathtub, the water level sensor output is V1 or more, and the comparison calculation storage means has stored data, the required pouring amount (Qx)
= {Water level sensor output at the set water level (V3)-current water level sensor output (Vx)} x pouring amount per water level sensor output (Δ
By calculating the required pouring amount in Q) and pouring by the pouring detecting means, accurate automatic hot water filling can be performed regardless of the remaining hot water amount.

In the bath water heater according to claim (4), when there is no remaining hot water in the bathtub (when the water level sensor output is equal to or less than V1),
First, the pouring water detecting means pours a small amount of water in the bathtub water volume (Q1) up to the bathtub adapter, then compares the water level with the set water level by the water level detecting means, and pours only the difference in water amount. Automatic hot water filling is possible regardless of the amount of hot water remaining up to the bathtub adapter.

In the large pouring bath water heater according to claim (5), a bypass valve is provided between the outgoing pipe and the return pipe to the bathtub, and when pouring is performed by the pouring detecting means, the bypass valve is opened, When pouring by water level detection means, close the bypass valve
By operating so as to satisfy the conditions of the pouring detecting means and the water level detecting means, the return pipe can also be used for pouring, so that the pouring amount can be increased and the automatic hot water filling time can be further reduced.

Further, in the large pouring bath water heater according to claim (6), when there is no remaining hot water in the bathtub (when the water level sensor output is V1 or less), the bypass valve is opened and the bathtub adapter is turned on by the pouring detecting means. The remaining amount of hot water up to the adapter of the bathtub can be obtained by pouring the water by the amount of water in the bathtub up to (Q1), then comparing with the set water level by the water level detection means and pouring the water again by the difference in water amount. Automatic hot water filling can be performed accurately regardless of the size of the hot water, and the time required for automatic hot water filling can be further reduced.

Further, in the large pouring bath water heater according to claim (7), a bypass rim is provided between an outgoing pipe and a return pipe to the bathtub,
When pouring by the pouring means, open the bypass valve,
When the water level is detected by the water level detection means, the bypass valve is closed while pouring the water in the outgoing pipe, the water level is detected in the return pipe, the calculated water level is compared with the set water level, and the hot water level is calculated. Since the circulation mode for detection can be omitted, the time of automatic hot water filling can be further reduced.

In the bath water heaters according to claims (1) to (4) and the large pouring bath water heaters according to claims (5) to (7), after completion of filling the bath tub, the water level in the bath tub is detected by the water level detecting means. Is constantly monitored, and when the water level drops by a certain value from the set water level, the hot water can be automatically added to the set water level.

Further, it is not necessary to change the set water level of the controller depending on the state of the remaining hot water, so that a convenient appliance can be provided.

[Brief description of the drawings]

FIG. 1 is an overall system diagram of a bath water heater in one embodiment of the present invention, and FIG. 2 is a water level-water level sensor output of the device.
FIG. 3 is a flow chart of the water level detection and pouring detection means of the apparatus, FIG. 4 is a block diagram of the control means in the apparatus, and FIGS.
Water level when there is a pouring comparison operation memory value-Water level sensor output-
Figures 7 and 8 show the water level and pouring comparison operation storage values in the same device, and the water level-water level sensor output-water volume integrated water volume characteristics when there is remaining hot water in the bathtub. Fig. 9 and Fig. 10 are an overall system diagram of a large pouring bath water heater in one embodiment of the present invention, and Fig. 11 is a water level-water level sensor output-water volume integrated water volume characteristic diagram of the same device. FIG. 12 to FIG. 13 are a water level-water level sensor output-water amount integrated water amount characteristic diagram, and a flow diagram when the water level and pouring comparison operation storage value is stored in the apparatus and there is remaining hot water in the bathtub.
FIGS. 14 to 15 show the water level by the different means when the bath has a remaining water level in the bathtub when there is a stored water level / pouring comparison operation value in the apparatus.
Water level sensor output-water amount integrated water amount characteristic diagram and flow chart, FIG. 16 is an overall system diagram of a bath water heater with conventional water level detecting means, and FIG. 17 is an overall system diagram of a bath water heater with conventional pouring water detecting means It is. 10 …… Automatic hot water supply on-off valve, 13 …… Three-way valve, 17 …… Going pipe,
19 ... bathtub, 21 ... return pipe, 23 ... water level sensor, 24 ...
Water quantity sensor, 25 ... Water level / pour comparison storage unit, 26 ...
... control means, 28 ... automatic hot water filling switch, 32 ... two-way valve.

Claims (7)

(57) [Claims] 1. An automatic hot water supply switch for turning on and off an automatic hot water supply opening / closing valve for automatically filling hot water into a bathtub, a water level detecting means for detecting a water level poured from the water heater into the bathtub,
Pouring water detecting means for detecting the amount of pouring water poured from the water heater into the bathtub, the water level detecting means, a water level symbol from the pouring detecting means, a pouring signal are inputted and subjected to a comparison operation, and a water level per bath level of the bathtub is calculated. Comparison operation storing means for comparing and calculating the amount of water in the storage tank, and when there is storage data in the comparison operation storage means, pouring is performed by the pouring detection means, and there is no storage data in the comparison operation storage means. In such a case, a bath water heater provided with means for pouring water by means of water level detection. 2. After pouring into a bath tub and passing through an inflection point of the output where the output of the water level sensor starts to change from zero, a three-way valve provided in the circulation circuit of the bath tub is switched to a return pipe side, and a certain time has elapsed. After that, the three-way valve is switched to the tank side, and the pressure signal output from the water level sensor is determined as a water level reference value storage (V1), and the output from the water level sensor is determined by the water level sensor until V1. The bath hot water supply apparatus according to claim 1, wherein the hot water supply device is controlled, and when the temperature exceeds V1, the pouring amount is controlled by a hot water detecting means. 3. When the water level sensor output is equal to or higher than the water level reference value storage (V1) and the comparison operation storage means has storage data,
Required pouring volume (Qx) = 水 water level sensor output at set water level (V
(3) The bath water heater according to (1), further comprising means for pouring water by a pouring detecting means based on the current water level sensor output (Vx)｝ × the pouring amount per water level sensor output (Qx). 4. When the water level sensor output is equal to or lower than the water level reference value memory (V1), the mode is switched to the circulation mode at the time when the amount of water in the bathtub water volume (Q1) to the bathtub adapter is reduced by a small amount.
The bath water heater according to claim 1, further comprising means for comparing the current water level with the set water level and pouring the hot water again by an amount corresponding to the difference. 5. A bypass valve is provided between an outgoing pipe and a return pipe to a bathtub. The bypass valve is opened when pouring is performed by the pouring detecting means. When the pouring is performed by the water level detecting means, the bypass valve is opened. Hot water supply system that closes the bath. 6. When the water level sensor output is equal to or less than the water level reference value memory (V1), the mode is switched to the circulation mode at the time when the amount of water in the bathtub water volume (Q1) to the bathtub adapter is reduced by a small amount.
The hot water bath hot water supply device according to claim 5, further comprising means for comparing the current water level with the set water level and pouring the water again by an amount corresponding to the difference. 7. The output of the water level sensor is stored as a water level reference value (V1).
In the following cases, when the water is poured by the amount of the bathtub water (Q1) to the bathtub adapter, the bypass valve is closed and the water level at that time is memorized. 6. The large pouring bath hot water supply device according to claim 5, further comprising means for pouring only the difference in the amount of water without turning off the on-off valve.