JP2022107456A - Bath water heater - Google Patents

Abstract

To provide a bath water heater capable of performing a test run for a bath.SOLUTION: A bath water heater has: a circulation outgoing pipe and a circulation returning pipe connected to a bath circulating port of a bathtub; a bath pump incorporated into a circulation route composed of these pipes; a stream sensor, and bath temperature and bath water level sensors; a hot-water supply pipe connected to the circulation route through a bath-running valve; and a controller. The bath water heater is capable of performing a test run operation for memorizing a proper amount of hot water run into the bathtub after installation of the bath water heater. The bath water heater has a test run sequence described below. In the test run operation, the hot water is run into the bathtub with an initial amount of hot water running set in 100-120 L to make the water level suit the bath circulation port. The stream sensor is used to check a continuous stream in the circulation route. If a continuous stream cannot be detected, additional 20 L hot water is run into the bathtub the necessary number of times until a continuous stream is confirmed. According to the amount of hot water at the point in time when a stream can be confirmed, the position of the bath circulation port is memorized.SELECTED DRAWING: Figure 1

Description

The present invention relates to a bath water heater having a hot water filling function, and which has a bath test run function for memorizing a bathtub installation status, a state, and a bathtub shape necessary for performing "automatic bath" operation.

As a function to improve comfort and usability when taking a bath, the bath water heater fills the bathtub with hot water at the bath temperature and bath water level that are automatically set by simply pressing the switch on the remote controller, and boil it. After that, a model with a fully automatic type bath function that allows the user to take a bath comfortably by keeping the set bath temperature and bath water level constant for a certain period of time has become widespread and generally used. ..

This fully automatic type bath water heater can recognize the bath water temperature and bath water level by installing a sensor that can detect the bath temperature and a sensor that can detect the water level in the circulation path between the bath water heater and the bathtub. It is said. This bath water heater automatically performs a reheating operation when the bath water temperature drops, operates to maintain the set bath temperature, and when it detects that the water level has dropped, the detected water level data It has a function that can keep the water level constant by calculating the amount of additional hot water required to return to the set water level from, automatically opening / closing the hot water filling valve, and adding the required amount of hot water. It is a device.

However, among the above functions, in order to secure the function of keeping the water level of the bath constant, the accuracy of the sensor that detects the water level is also sufficient, but the relationship between the installation height of the bath water heater and the bathtub and the bathtub differ depending on the site. It is necessary to accurately recognize the height of the circulation port installed in the bathtub, the shape of the bathtub, and the capacity in advance. For this reason, it is common practice to carry out a bath test run in which the installation state and situation of the bath water heater and the bathtub and the shape of the bathtub are learned in advance after the installation of the bath water heater.

As a conventional technique, in Patent Document 1, after installing a bath water heater, when the amount of hot water in the bathtub is empty, after closing the bathtub plug, hot water is automatically filled little by little, and circulation check and water level detection are performed each time. , The bath test run method for learning the position of the circulation port, the position of the reference water level, and the shape of the bathtub is disclosed.
Further, in Patent Document 2, a bathtub in which a reference amount of the bathtub is estimated based on bathtub data set by a user's operation and a test run is performed to learn a circulation port position, a reference water level position, and a bathtub shape. The test run method is disclosed.

Japanese Unexamined Patent Publication No. 11-83157 Japanese Unexamined Patent Publication No. 2013-231563

The method described in Patent Document 1 has a drawback that it takes a long time to test-run the bath because the hot water is filled little by little, the hot water is stopped, the circulation is checked, and the water level is detected many times during the test run of the bath. there were. Therefore, in order to shorten the test run time, it is possible to shorten the test run time by increasing the amount of hot water filling in small amounts and reducing the number of confirmations, but the water level in this small amount of hot water filling Since the amount of rise becomes large and the position of the circulation port may not be accurately grasped, there may be a problem that the proper water level cannot be set.
Further, in the method described in Patent Document 2, since the test run is performed based on the assumed reference water level, the test run time can be shortened, but a manual operation for making the device recognize the bathtub information in advance is required. There is a drawback that the trial run work becomes complicated.

The present invention has been made in view of the above-mentioned problems of the prior art, and the relationship between the installation height of the bath water heater main body and the bathtub, which is the minimum necessary for actual use, the height of the circulation port installed in the bathtub, and the bathtub. It provides a bath water heater equipped with a new bath test run function that allows students to learn the shape and capacity.
Further, the present invention provides a bath water heater having a test run function capable of setting the water level in a short time and further recognizing an accurate circulation port position without the trouble of the user. By doing so, we will provide a bath water heater that contributes to reducing the load on the contractor and contributing to the comfortable bathing of the user.

The present invention has the following configuration as a means for solving the above-mentioned problems.
(1) The bath water heater of the present invention has a circulation path including a circulation going pipe and a circulation return pipe connected to a bath circulation port provided in the bathtub, and the circulation going pipe and the circulation return pipe. The built-in bath pump, the water flow sensor, the bath temperature sensor, and the bath water level sensor provided in the circulation path are connected to the circulation path via a hot water filling valve, and the hot water filling valve is opened and closed to open and close the circulation piping and the circulation piping. It is connected to the hot water supply pipe that can supply hot water to the bathtub via the circulation return pipe, the bath pump, the water flow sensor, the bath temperature sensor, the bath water level sensor, and the hot water filling valve, and controls from these operations and detection data. It is a bath water heater provided with a controller to perform the operation, and is a bath water heater capable of performing a trial run operation for memorizing an appropriate amount of hot water filling the bathtub after the installation of the bath water heater. The initial amount of hot water filling to set the water level corresponding to the bath circulation port is set to 100 to 120 L, hot water filling is performed, the continuous water flow in the circulation path is confirmed by the water flow sensor, and the continuous water flow cannot be detected. In this case, 20 L of hot water is further filled for the required number of times until the continuous water flow can be confirmed, and a trial run sequence for storing the position of the bath circulation port according to the amount of hot water at the time when the water flow can be confirmed is performed by the controller. It is characterized by being prepared for.

(2) The bath water heater of the present invention has a circulation path including a circulation going pipe and a circulation return pipe connected to a bath circulation port provided in the bathtub, and the circulation going pipe and the circulation return pipe. The built-in bath pump, the water flow sensor, the bath temperature sensor, and the bath water level sensor provided in the circulation path are connected to the circulation path via a hot water filling valve, and the hot water filling valve is opened and closed to open and close the circulation piping and the circulation piping. It is connected to the hot water supply pipe that can supply hot water to the bathtub via the circulation return pipe, the bath pump, the water flow sensor, the bath temperature sensor, the bath water level sensor, and the hot water filling valve, and controls from these operations and detection data. It is a bath water heater provided with a controller to perform the operation, and is a bath water heater capable of performing a trial run operation for memorizing an appropriate amount of hot water filling the bathtub after the installation of the bath water heater. At the time of filling the hot water, the shape of the bathtub is mainly learned from the amount of hot water filling after covering the bath circulation port and the amount of change in the water level of the bathtub. The controller is provided with a trial run sequence determined by a detection value of the bath water level sensor during a drainage operation.

(3) In the bath water heater of the present invention, a remote controller is connected to the controller, and the controller detects the bath circulation port determined by the trial run operation by operating a switch for filling hot water of the remote controller. It is characterized by having a function of performing an appropriate amount of hot water filling calculated based on the amount of hot water filling corresponding to the position.

According to the present invention, the initial amount of hot water is set to 100 to 120 L, and after the hot water is filled, 20 L is filled as necessary by checking the circulation, and the bath circulation port is confirmed by confirming the continuous water flow in the circulation path. Since the position of the bath can be confirmed and the test run of the bath can be completed, the time for the test run of the bath can be shortened.
Specifically, compared to the conventional bath test run method in which 10 L or 20 L of hot water is filled and circulation is confirmed each time, the circulation confirmation can be reduced about 4 times, so a total of 4 to 5 minutes can be shortened. A water heater can be provided. In addition, since no special operation is required to carry out the test run, anyone can easily carry out the test run. Therefore, it is possible to reduce the load on the contractor and provide a bath water heater that contributes to the comfortable bathing of the user.

In addition, since the position of the bath circulation port has been determined by filling the bath circulation port with a fixed amount in the past, the water level of the bath circulation port may deviate by the amount of the fixed amount of hot water filling due to the influence of the position of the bath circulation port and the like. However, in the present invention, since the water level can be continuously detected when draining from the bathtub, it can be recognized as the water level of the bath circulation port by recognizing that the drop in the water level has disappeared, and the bath circulation. There is no deviation in the detection position of the mouth, and it is possible to set the water level with extremely high reproducibility.

It is a schematic diagram which shows the relationship between the structure of the bath water heater which concerns on 1st Embodiment of this invention, and a bathtub. It is a schematic diagram for demonstrating an example of the hot water filling state at the time of the trial run with respect to the bathtub shown in FIG. It is a schematic diagram which shows the water level at the time of drainage in the bathtub shown in FIG. It is a graph which shows an example of the water level detection chart at the time of drainage in the bathtub shown in FIG. It is explanatory drawing which shows the state which performs the test run by filling with hot water by 10L in the conventional bath water heater. It is explanatory drawing which shows the state which performs the test run by filling with hot water by 20L in the conventional bath water heater. It is explanatory drawing which shows the initial state in the case of filling with hot water in the bath water heater which concerns on this invention. It is explanatory drawing which shows the state in the case of drainage to the circulation port position in the bath water heater which concerns on this invention.

Hereinafter, the bath water heater according to the first embodiment of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the embodiments described below.
FIG. 1 is a configuration diagram showing a bathtub 15 and a bath water heater 1 arranged in the vicinity of the bathtub 15.
The bath water heater 1 of the present embodiment includes a circulation going pipe 8-2 and a circulation return pipe 8-1 connected to a bath circulation port 16 provided in the lower side wall of the bathtub 15, and these circulation going pipes 8 are provided. -2 and the circulation return pipe 8-1 are connected to each other to form a bath circulation path 8. A part of the bath circulation path 8 is drawn into the bath water heater 1, and the bath water level sensor 13 is connected to the bath circulation path 8 housed inside the bath water heater 1 in order from the side closest to the bathtub 15 in this figure. The bath temperature sensor 14, the bath pump 12, the water flow sensor 11, and the reheating heat exchanger 4 are incorporated, but the arrangement thereof is not particularly limited.
In the bath water heater 1, in addition to the above-mentioned bath water level sensor 13, bath temperature sensor 14, bath pump 12, water flow sensor 11, reheating heat exchanger 4, and the hot water supply heat exchanger 3 described later, inside the box-shaped case, A controller 5, a hot water filling valve 9, a flow rate sensor 10, and the like are incorporated.

With the above configuration, when hot water is stored above the bath circulation port 16 of the bathtub 15, the hot water in the bathtub 15 is sucked into the circulation return pipe 8-1 by operating the bath pump 12 to exchange reheating heat. It can be supplied to the vessel 4. Further, the hot water heated by the reheating heat exchanger 4 can be returned to the bathtub 15 via the circulation pipe 8-2. Therefore, in the configuration shown in FIG. 1, reheating can be performed by adjusting the hot water temperature of the bathtub 15 to a target hot water temperature while circulating the hot water of the bathtub 15 along the bath circulation path 8.

When the hot water from the bathtub 15 circulates in the bath circulation path 8, the hot water sucked into the circulation return pipe 8-1 is located at each position of the bath water level sensor 13, the bath temperature sensor 14, the bath pump 12, and the water flow sensor 11. Pass in order. Therefore, the bath temperature sensor 14 can measure the temperature of the hot water drawn from the bathtub 15 into the circulation return pipe 8-1. The temperature of the hot water measured by the bath temperature sensor 14 can be considered to be the same as the temperature of the hot water contained in the bathtub 15. In addition, the water flow sensor 11 can measure the presence or absence of water flow in the bath circulation path 8.

A branch pipe 7A from the hot water supply pipe 7 is connected to the bath circulation path 8 between the water flow sensor 11 and the reheating heat exchanger 4. The base end side of the hot water supply pipe 7 is connected to a hot water supply heat exchanger 3 provided inside the bath water heater 1, and a hot water supply port 7-1 is formed on the tip end side of the hot water supply pipe 7. Hot water can be supplied from the hot water supply port 7-1 to the hot water supply load side of the bathroom or the like. A water supply pipe 6 is connected to the hot water supply heat exchanger 3, and water is supplied to the water supply pipe 6 from a water supply or the like connected to the water supply port 6-1.
A branch pipe 7A extends from a hot water supply pipe 7 between the hot water supply heat exchanger 3 and the hot water supply port 7-1, and the branch pipe 7A is connected to the bath circulation path 8 described above. Further, the branch pipe 7A incorporates an electromagnetic hot water filling valve 9 and a flow rate sensor 10 in this order from the side closest to the connection portion to the hot water supply pipe 7.

In the bath water heater 1 described above, hot water that has passed through the hot water supply heat exchanger 3 can be supplied to the bath circulation path 8 via the branch pipe 7A by opening and closing the hot water filling valve 9. Further, the flow rate sensor 10 can measure the amount of hot water supplied from the hot water supply pipe 7 to the bath circulation path 8 via the branch pipe 7A. In other words, the amount of hot water supplied from the hot water supply pipe 7 to the bathtub 15 side via the circulation forward pipe 8-2 and the circulation return pipe 8-1 of the bath circulation path 8 can be measured.
The hot water supplied to the bathtub 15 may be supplied via both the circulation going pipe 8-2 and the circulation return pipe 8-1 as described above, or may be supplied by the circulation going pipe 8-2 alone. But it doesn't matter.

Further, a controller 5 for control is provided inside the bath water heater 1. The controller 5 is electrically connected to a hot water filling valve 9, a flow rate sensor 10, a water flow sensor 11, a bath pump 12, a bath water level sensor 13, and a bath temperature sensor 14 via wiring or the like, and controls the operation of each of these devices. However, it has a configuration that can grasp and record the detection data obtained from each of these devices.
Further, the controller 5 has a function capable of executing a test run sequence described later based on the detection data from each of these devices.

The bath water heater 1 according to the present embodiment can carry out a bath test run by the following method in order to solve the above-mentioned problems, and the system configuration is special for a general bath water heater as shown in FIG. It can be realized without adding various equipment. Further, since the test run sequence described below is an operation that can be controlled by the controller 5, it can be easily executed by storing it as an additional function in the controller 5.

In order to learn in advance the relationship between the installation heights of the bathtub 1 and the bathtub 15, which differ depending on the site, the height of the circulation port 16 installed in the bathtub 15, the shape of the bathtub, and the capacity, this embodiment is implemented after the installation work is completed. In the test run, the bathtub is empty, the bathtub drain port 15A is closed by the bath drain plug 17, and the following operations "1" to "4" or the test run sequence based on "1" to "5" is used. Perform the operation.

"1" First, the hot water filling valve 9 is opened, the amount of hot water for the bathtub 15 is measured by the flow rate sensor 10, and the fixed amount of hot water filling (for example, 100 [L]) of Q1 [L] shown in FIG. 2 is performed, and then the bath pump. 12 is operated to detect the water flow of the bath circulation path 8 with the water flow sensor 11, and it is confirmed whether or not the continuous water flow can be detected.
Here, if the continuous water flow can be confirmed, it means that the water level has reached until the bath circulation port 16 of the bathtub 15 is covered by the fixed amount of hot water filling of Q1 [L] shown in FIG. ..
On the other hand, if continuous water flow cannot be confirmed, it means that the water level has not reached the bath circulation port 16 of the bathtub 15, so the hot water filling valve 9 is opened again and the flow sensor 10 measures the water as shown in FIG. The hot water filling (for example, 20 [L]) is repeated until Q2 [L] is detected, and the bath pump 12 is operated each time, and the hot water filling is repeated until the water flow in the bath circulation path 8 is continuously generated. do.
Here, the means for detecting the water flow of the bath circulation path 8 is not limited to the water flow switch having a built-in butterfly type proximity switch, but any means that can detect the water flow of the bath circulation water such as the rotation speed and current of the bath pump 12. For example, the method is not particularly questioned.

"2" After that, in order to completely discharge the air in the bath circulation path 8, the bath pump 12 is stopped after sufficient circulation is confirmed, the water level in the bathtub 15 is detected by the bath water level sensor 13, and the value is controlled by the controller. It is stored in a memory or the like built in 5 (water level: L1).
As shown in Table 1 below, most of the commonly used bathtubs 15 have a full capacity of 200 L or more, and the amount of hot water required to cover the bath circulation port 16 is 80. Generally, it is about 120 L.
Therefore, even if the initial amount of hot water filled during the trial run is continuously set to about 100 L (100 L to 120 L), the hot water level does not greatly exceed the bath circulation port 16 and is convenient. In most cases, the water level is higher than the bath circulation port 16 which does not give a sense of discomfort.
Further, if the bath test runner can manually determine the amount of the initial hot water filling, the time required for the test run can be further shortened.

"3" After that, the hot water filling valve 9 is further opened, the fixed amount hot water filling (for example, 30 [L]) of Q3 [L] shown in FIG. 2 is performed while measuring with the flow rate sensor 10, and then the bath pump 12 is operated. After confirming that the water flow in the bath circulation path 8 continues, the air in the bath circulation path 8 is completely discharged, then the bath pump 12 is stopped, and the water level is detected again by the bath water level sensor 13. The value is stored in the controller 5 (water level: L2).

"4" The shape of the bathtub 15 can be detected and grasped from the water level L1 shown in FIG. 2 and the specified amount Q3 [L] (here, 30 [L]) stored in the controller 5 in advance, and the water level L2 after the hot water is added.
That is, as shown in FIG. 2, it can be recognized that the bathtub 15 is a bathtub 15 in which a water level change (L2-L1) exists at Q3 [L] (here, 30 [L]). That is, it can be recognized that the bathtub 15 has a water level change amount ΔLs (= (L2-L1) / Q3)), and the hot water filling operation is completed.

In order to confirm the certainty of the shape of the bathtub 15, the hot water filling valve 9 is opened again, and the flow sensor 10 is used to measure the fixed amount of hot water filling of Q4 [L] (for example, 20 [L], etc., or in a trial run. The amount of hot water required to reach the set water level) is performed, and then the bath pump 12 is operated to confirm that the water flow in the bath circulation path 8 continues, and the air in the bath circulation path 8 is completely discharged. After that, the bath pump 12 is stopped, the water level is detected again by the bath water level sensor 13, and stored in the controller 5 (water level: L3). The L3 water level that can be calculated is about L2 + ΔLs · Q4.
The water level of L3 can be compared with the water level calculated from ΔLs described above, verified, and corrected if different.
The bathtub filled state (relationship between Q1 to Q4 and L1 to L3) of the above "1" to "4" is shown in FIG.

By the trial run operation of "5" or more, the position of the bath circulation port 16 that does not feel strange in actual use can be detected, and the learning of the shape of the bathtub 15 is completed.
Next, a method of grasping and learning the more accurate position of the bath circulation port 16 with only a very simple operation will be described.
In the operation, after the hot water filling is completed, the bath drain plug 17 is opened to open the bathtub drain port 15A, and the position of the bath circulation port 16 can be detected more accurately only by draining the water. After draining the water from the bathtub 15, the controller 5 continuously monitors the detected value of the bath water level sensor 13. Then, the detected value of the bath water level sensor 13 installed in the bath circulation path 8 gradually decreases as shown in FIG. 4 in proportion to the decrease in the water level from L3 to L4 as shown in FIG. FIG. 4 is a graph showing the drainage time on the horizontal axis and the water level on the vertical axis when draining as shown in FIG. 3, but the water level in the bath 15 is constant with the passage of the drainage time from L3 to L4. Decrease at a rate.
Then, when the water level of the bathtub 15 is lower than the bath circulation port 16, the detected value of the bath water level sensor 13 only detects the water level in the pipe, and a change point that does not cause a proportional decrease in the water level appears.

The position of the detected value L4 of the bath water level sensor 13 at this time (see FIG. 4) is the water level that accurately covers the bath circulation port 16, and the position can be detected. Then, the water level obtained by adding a constant water level (for example, 3 cm) to the water level of L4 is used as the reference water level of the bathtub 15, and each set water level and each hot water filling amount can be calculated easily from the previously calculated ΔLs and the like. It is possible to provide a bath test run operation that enables accurate water level setting in a short time.

Further, since the controller 5 can grasp the accurate water level covering the bath circulation port 16 by the bath trial run operation of "1" to "4" or the bath trial run operation of "5" described above, it was calculated first. Since the set water level according to the bathtub 15 and the hot water filling amount for that can be calculated from ΔLs or the like, if the controller 5 stores the set water level and the hot water filling amount according to the bathtub 15 determined by the bath test run, the bath hot water supply When the user uses the bath after installing the vessel 1, proper hot water filling can always be performed.
As described above, the shape of the bathtub is learned from the amount of hot water filled after covering the bath circulation port 16 and the amount of change in the water level of the bathtub. The controller 5 can be provided with a trial run sequence determined by the detection value of the bath water level sensor 13.

Further, as shown in FIG. 1, a remote controller 18 is connected to the controller 5 and the remote controller 18 is provided with a switch for filling hot water to detect the bath circulation port 16 determined by the previous test run operation. The controller 5 can be configured to have a function of performing an appropriate amount of hot water filling calculated based on an appropriate amount of hot water filling corresponding to the position. As a result, the remote controller 18 can perform an appropriate hot water filling operation on the bathtub 15.

It can be explained that the conventional test run method of filling a small amount (here, 10 L each) with hot water at a time with respect to the bath test run method described above is the hot water filling method described below based on FIG.
As shown in FIG. 5, when 10 L of hot water is filled and the circulation of hot water flowing through the bath circulation path 8 is confirmed, the position capacity of the circulation port 16 in the bathtub 15 is required to make the water level higher than the bath circulation port 16. In the case of 110L, it takes 20 minutes and 15 seconds to detect the position of the circulation port 16. In FIG. 5, the water level line parallel to the bottom surface of the bathtub 15 is shown as a water level line of 10 L each, and it is shown that the circulation port 16 is completely covered with hot water at the position of the 11th water level line from the bottom surface of the bathtub. ing.
In this bath test operation method, it is assumed that 11 minutes for filling with hot water 11 times, 8 minutes and 15 seconds for 11 times of circulation confirmation (the circulation confirmation time for each time is 45 seconds), and 1 minute for water level detection are required. The total time required is 20 minutes and 15 seconds. However, although there is a possibility of an error of 10 L, the position of the bath circulation port 16 can be detected relatively accurately.

It can be explained that the conventional test run method of filling 20 L of hot water at a time with respect to the bath test run method of the present embodiment described above is the hot water filling method described below based on FIG.
As shown in FIG. 6, when 20 L of hot water is filled at a time and the circulation of hot water flowing through the bath circulation path 8 is confirmed, the position of the circulation port in the bathtub 15 is required to make the water level higher than the bath circulation port 16. When the capacity is 110 L, it takes 17 minutes and 30 seconds to detect the position of the circulation port. In FIG. 6, the water level line parallel to the bottom surface of the bathtub 15 is shown as a water level line of 20 L each, and the circulation port 16 is completely covered with hot water at the position of the water level line supplied with 120 L of hot water from the bottom surface of the bathtub. It is shown that.
In this bath test operation method, it is assumed that it takes 12 minutes for 6 times of hot water filling, 4 minutes and 30 seconds for 6 times of circulation confirmation (the circulation confirmation time for each time is 45 seconds), and 1 minute for water level detection. The total time required is 17 minutes and 30 seconds. However, the position detection accuracy of the bath circulation port 16 can be roughly detected, including the possibility of an error of 20 L.

In contrast to the hot water filling shown in FIGS. 5 and 6, in the above-described embodiment, as shown in FIG. 7, the hot water filling amount of 10 L / min requires 12 minutes for two hot water fillings (100L + 20L), and one for two circulation confirmations. It takes 1 minute and 30 seconds to detect the water level, and 14 minutes and 30 seconds in total to detect the position of the bath circulation port 16. Therefore, it is possible to carry out a test run sequence of the bath that enables accurate position detection of the bath circulation port 16 in a short time of about 5 minutes or more, as compared with the conventional method described above based on FIGS. 5 and 6.

Further, after raising the water level to a position exceeding the bath circulation port 16, the bath drain plug 17 of the bathtub 15 is pulled out to drain water as shown in FIG. 8, and the time for the water level to drop to the position of the bath circulation port 16 is 30 seconds. It only takes about. That is, when a graph showing the relationship between the drainage time and the water level shown in FIG. 4 is drawn according to the drainage, the detection value of the bath water level sensor 13 only detects the water level in the pipe, and a change point that does not cause a proportional drop in the water level appears. Since it takes about 30 seconds to reach the position, the time required to detect the position of the bath circulation port 16 can be shortened.

As described above, when the test run method according to the test run sequence according to the present embodiment is carried out, the accurate position of the bath circulation port 16 can be confirmed in a total of about 15 minutes.
Therefore, it is possible to carry out a test run of the bath capable of accurately detecting the position of the bath circulation port 16 in a short time of about 5 minutes, as compared with the conventional method described above based on FIGS. 5 and 6.

On the other hand, assuming that the conventional method of filling 10 L with hot water takes 20 minutes and 15 seconds, it takes about 15 minutes in this embodiment, so that the position detection of the bath circulation port 16 can be shortened by 5 minutes or more. Moreover, according to the test run method of the present embodiment, the position of the bath circulation port 16 can be grasped more accurately than any of the conventional methods.

1 ... bath water heater, 2 ... heating means, 3 ... hot water supply heat exchanger, 4 ... reheating heat exchanger, 5 ... controller, 6 ... water supply pipe, 6-1 ... water supply port, 7 ... hot water supply pipe, 7-1 ... Hot water supply port, 8 ... Bath circulation path, 8-1 ... Circulation return pipe, 8-2 ... Circulation going pipe, 9 ... Hot water filling valve, 10 ... Flow sensor, 11 ... Water flow sensor, 12 ... Bath pump, 13 ... Bath Water level sensor, 14 ... bath temperature sensor, 15 ... bathtub, 16 ... bath circulation port, 17 ... bath drain plug, 18 ... remote controller.

Claims (3)

In the circulation path, the circulation going pipe and the circulation return pipe connected to the bath circulation port provided in the bathtub, the bath pump incorporated in the circulation path provided with the circulation going pipe and the circulation return pipe, and the circulation path. A water flow sensor, a bath temperature sensor, and a bath water level sensor provided are connected to the circulation path via a hot water filling valve, and hot water can be supplied to the bathtub via the circulating forward pipe and the circulation return pipe by opening and closing the hot water filling valve. It is a bath water heater provided with a hot water supply pipe, a controller connected to the bath pump, the water flow sensor, the bath temperature sensor, the bath water level sensor, and the hot water filling valve, and controlled from these operations and detection data.
A bath water heater that enables a test run operation to memorize an appropriate amount of hot water filled in the bathtub after the installation of the bath water heater.
At the time of the test run operation, the initial amount of hot water filling for setting the water level corresponding to the bath circulation port is set to 100 to 120 L, hot water filling is performed, and the continuous water flow in the circulation path is confirmed by the water flow sensor. If continuous water flow cannot be detected, 20 L of hot water is further filled for the required number of times until the continuous water flow can be confirmed, and the position of the bath circulation port according to the amount of hot water at the time when the continuous water flow can be confirmed is stored. A bath water heater characterized in that the controller is equipped with a test run sequence. In the circulation path, the circulation going pipe and the circulation return pipe connected to the bath circulation port provided in the bathtub, the bath pump incorporated in the circulation path provided with the circulation going pipe and the circulation return pipe, and the circulation path. A water flow sensor, a bath temperature sensor, and a bath water level sensor provided are connected to the circulation path via a hot water filling valve, and hot water can be supplied to the bathtub via the circulating forward pipe and the circulation return pipe by opening and closing the hot water filling valve. It is a bath water heater provided with a hot water supply pipe, a controller connected to the bath pump, the water flow sensor, the bath temperature sensor, the bath water level sensor, and the hot water filling valve, and controlled from these operations and detection data.
A bath water heater that enables a test run operation to memorize an appropriate amount of hot water filled in the bathtub after the installation of the bath water heater.
At the time of filling the hot water during the trial run operation, the shape of the bathtub is mainly learned from the amount of hot water filling after covering the bath circulation port and the amount of change in the water level of the bathtub, and the position detection of the bath circulation port is concerned. A bath water heater characterized in that the controller is provided with a trial run sequence determined by a detection value of the bath water level sensor during a drainage operation after filling with hot water. A remote controller is connected to the controller, and the controller is calculated based on the amount of hot water filling corresponding to the detection position of the bath circulation port determined by the test run operation by operating the switch for filling the hot water of the remote controller. The bath water heater according to claim 1 or 2, wherein the bath water heater is provided with a function of filling an appropriate amount of hot water.

Images