JP2020134055A - Bath water heater - Google Patents

Abstract

To solve a problem in which a wrong cross section is stored if the cross section is found from a hot water filling amount obtained by a flow sensor and a change amount of a water level obtained by a water level sensor, when a user takes a bath during hot water filling operation or uses the initially-taken hot water using the bathtub hot water.SOLUTION: Cross section calculating means 36 of a control device 27 is prevented from calculating the cross section of this time when admission determination means 34 determines the admission of a person during an interval from hot water filling start-up to hot water filling operation completion, and is made to calculate the cross section of this time when the admission determination means 34 does not determine the admission of the person during the interval from the hot water filling start-up to the hot water filling operation completion.SELECTED DRAWING: Figure 2

Description

The present invention relates to a bath water heater provided with a water level sensor.

Conventionally, in this type of bath water heater, water is heated by, for example, a burner and a heat exchanger based on a hot water amount setting means such as a remote control for setting the hot water supply amount to the bathtub and the set hot water amount, and a predetermined temperature is obtained. A hot water filling operation means for dropping the hot water directly into the bathtub and filling the bathtub with hot water, and a flow sensor for detecting the amount of hot water filling by the hot water filling operation means are provided. Further, in the bath hot water supply device, the cross-sectional area for calculating the bath cross-sectional area is calculated from a water level sensor such as a pressure sensor that detects the water level of the bathtub, the amount of hot water filled by the flow rate sensor, and the amount of change in the water level obtained by the water level sensor. It was equipped with a calculation means, and kept memorizing and holding the cross-sectional area of the bathtub, and used it for water replenishment and hot water filling operation. (See Patent Document 1).

Japanese Unexamined Patent Publication No. 2001-215501

However, in this cross-section calculation means, when the user takes a bath during the hot water filling operation or when the hot water in the bathtub is used as a hot water, the amount of hot water filled by the flow rate sensor and the water level obtained by the water level sensor When the cross-sectional area is obtained from the amount of change in, there is a problem that the wrong cross-sectional area is memorized and kept.

In order to solve the above problems, the present invention includes a water level sensor that detects the water level in the bathtub, a bath flow rate sensor that counts the amount of hot water filled in the bathtub, and a human sensor that detects the movement of a person in the bathroom. A hot water filling means for supplying hot water to the bathtub is provided, and an entry determination means for determining whether or not a person has entered the bathroom based on the detection result of the human sensor and a pipe communicating with the bathtub are used. The bathtub is cut off from the hot water filling operation control means for performing the hot water filling operation for supplying a predetermined amount of hot water, the detection value detected by the water level sensor, and the detection value detected by the bath flow rate sensor. In a bath hot water supply device provided with a control device provided with a cross-sectional area calculation means for calculating an area, the cross-sectional area calculation means of the control device is used between the start of the hot water filling operation and the completion of the hot water filling operation. When the room entry determination means determines the entry of a person, the cross-sectional area is not calculated this time, and the entry determination means of the person enters the room between the start of the hot water filling operation and the completion of the hot water filling operation. When is not determined, the cross-sectional area is calculated this time.

Further, the control device does not accept the determination result of the room entry determination means from the start of the hot water filling operation to a predetermined amount lower than the hot water filling set amount or from the start of the hot water filling operation to a predetermined time. When the predetermined amount or the predetermined time is exceeded, it is determined whether to calculate the cross-sectional area or not to calculate the cross-sectional area based on the determination result of the room entry determination means.

Further, the cross-section calculation means has a difference between the set amount of hot water and the predetermined amount, the water level when the set amount of hot water is filled, and the water level when the set amount of hot water is filled. The cross section is calculated from the water level difference.

Further, the control device is provided with a storage means for storing the cross-section area calculated by the cross-section area calculation means and a counting means for counting the number of times stored in the storage means, and the count of the counting means is equal to or higher than a predetermined count. In this case, the cross-section area is not calculated by the cross-section area calculation means.

According to the present invention, when the entry determination means determines that there is a room, the cross section calculation means does not calculate the cross section, so that the user enters the bathroom and the bathtub is filled with water. It is possible that bathing or hot water has been taken, and by not calculating the cross section of the bathtub with low reliability, only the cross section of the bathtub with high reliability can be calculated.

Schematic diagram of the first embodiment of the present invention A flowchart showing an operation for learning the cross section of the bathtub of the present invention.

Next, the first embodiment of the present invention will be described with reference to the drawings.
1 is a hot water storage tank for storing hot water, 2 is a heat pump unit as a heating means for heating hot water, and 3 is a bathtub.

Further, as a general structure of the bathtub 3, the bathtub 3 spreads from the bottom end to the upper end, and a step is provided for the purpose of an armrest.

Reference numeral 4 denotes a heating circulation circuit that circulates the hot water storage tank 1 and the heat pump unit 2. The heat pump going pipe having the heating circulation pump 5 and connected to the lower part of the hot water storage tank 1 and the heat pump returning connected to the upper part of the hot water storage tank 1 The cold water in the lower part of the hot water storage tank 1 is heated by the heat pump unit 2 via the heat pump outbound pipe, and the heated high-temperature hot water is returned to the upper part of the hot water storage tank 1 by the heat pump return pipe to be warm water in the hot water storage tank 1. Is heated and stored. A hot water storage temperature sensor 6 is provided on the outer peripheral surface of the hot water storage tank 1, and the hot water storage amount is detected by detecting a predetermined temperature or higher.

7 is a water supply pipe that supplies water to the hot water storage tank 1, 8 is a hot water supply pipe that discharges hot water in the hot water storage tank 1, 9 is a water supply bypass pipe that branches from the water supply pipe 7 and bypasses the hot water storage tank 1, and 10 is a water supply bypass. A hot water supply mixing valve that mixes cold water from the pipe 9 and hot water from the hot water outlet pipe 8 so as to reach a set temperature, 11 is a hot water supply pipe that supplies hot water of the mixed set temperature, and 12 is provided at the end of the hot water supply pipe 11. It is a hot water tap. Reference numeral 13 denotes a hot water supply temperature sensor provided downstream of the hot water supply mixing valve 10, and reference numeral 14 denotes a hot water supply flow rate sensor for counting the amount of hot water supplied. Reference numeral 15 is a pressure reducing valve for reducing the water pressure to a predetermined pressure, and 16 is a pressure relief valve for releasing the overpressure caused by heating.

Reference numeral 17 denotes a bath circulation circuit, in which the bath heat exchanger 18 and the bathtub 3 for heat exchange between the hot water in the hot water storage tank 1 and the hot water of the circulating bath are connected to the bath going pipe 17a from the bathtub 3 to the bath heat exchanger 18. It is circulatedly connected to the bath return pipe 17b from the bath heat exchanger 18 to the bathtub 3.

19 is a bath circulation pump provided in the bath circulation circuit 17, 20 is a running water sensor that detects the presence or absence of running water, 21 is a bath temperature sensor that detects the temperature of the bath flowing through the bath circulation circuit 16, and 22 is a bathtub from the water pressure of hot water. It is a water level sensor that detects the water level in 3, and is provided on the upstream side of the bath circulation pump 19 in the middle of the bath circulation circuit 17. Since the water level sensor 22 detects the water level in the bathtub 3 from the water pressure of the hot water, the water level cannot be detected if the circulation port of the bathtub 3 is exposed. Therefore, in order to detect the water level, the water level of the bathtub 3 is detected. The water level must be above the circulation port.

23 is a hot water filling pipe that is branched from the middle of the hot water supply pipe 11 and is connected to the bath circulation circuit 17 to fill the bathtub 3 with hot water, and 24 is provided in the hot water filling pipe 23 to start filling the bathtub 3. The hot water filling valve 25 for stopping is a bath flow rate sensor that counts the amount of hot water filled in the bathtub 3.

Reference numeral 26 denotes a heating control unit that controls the heating of the heat pump unit 2, and 27 is a control device that controls hot water supply and bath. Hot water storage temperature sensor 6, hot water supply temperature sensor 13, hot water supply flow rate sensor 14, running water sensor 20, bath temperature sensor 21. , The detected values of the water level sensor 22 and the bath flow sensor 25 are input to drive the heating circulation pump 5, the hot water supply mixing valve 10, the bath circulation pump 19, and the hot water filling valve 24.

Further, the configurations required to supply hot water to the bathtub 3 are a hot water storage tank 1, a water supply pipe 7, a hot water outlet pipe 8, a water supply bypass pipe 9, a hot water supply mixing valve 10, a hot water supply pipe 11, a bath circulation circuit 17, and a hot water filling pipe. 23, a hot water filling means composed of a hot water filling valve 24.

Reference numeral 28 denotes a remote control in the bathroom provided in the bathroom, which can communicate with the control device 27, and is an operation for starting the hot water filling operation and setting the set water level which is the target water level for the hot water filling operation and the hot water filling setting amount which is the target amount. A unit 29, a display unit 30 for displaying the setting contents, a notification unit 31 for notifying that the hot water filling operation is completed, and a motion sensor 32 for detecting the presence or absence of a person in the bathroom are provided. Reference numeral 33 denotes an outdoor remote controller provided outside the bathroom, which is provided with an operation unit 29, a display unit 30, and a notification unit 31 in the same manner as the in-bathroom remote controller 28.

The motion sensor 32 is a pyroelectric sensor that detects the amount of temperature change of the heat source in the detection area, and detects that there is a person in the bathroom. Specifically, the motion sensor 32 detects whether or not a person is present in the bathroom by detecting a temperature change in the detection area when the person moves or moves limbs or the like. Therefore, based on the detection result of the motion sensor 32, the entry determination means 34 provided in the control device 27 determines whether to enter the bathroom or leave the bathroom.

Further, in the control device 27, the cross-sectional area of the bathtub 3 is determined from the hot water filling operation control means 35 that controls the operation during the hot water filling operation, the detection value detected by the water level sensor 22, and the detection value detected by the bath flow rate sensor 25. It includes a cross-sectional area calculating means 36 to be calculated, a storage means 37 for storing the cross-sectional area calculated by the cross-sectional area calculating means 36, and a counting means 38 for counting the number of times stored in the storage means 37.

The cross-section area calculation means 36 has an amount of difference between the hot water filling set amount and a predetermined amount lower than the hot water filling set amount, the water level when the hot water filling set amount is filled with hot water, and the water level when the predetermined amount of hot water is filled. The cross section is calculated from the water level difference from the water level.

If the flow rate exceeds the armrest step provided in the bathtub 3, the change width of the cross section can be reduced and the cross section can be calculated more accurately, and the user can calculate the cross section more accurately at the initial stage of the hot water filling operation. There is a possibility of entering the bathroom to confirm that the plug has come off, and there is a problem that the cross-sectional area cannot be calculated indefinitely. Therefore, by not accepting the determination result of the entry determination means 34 until the predetermined amount is reached, the cross-sectional area is indefinitely. It is also possible to solve the problem that the calculation cannot be performed.

Next, the boiling operation will be described.
When there is a boiling request, the control device 27 drives a heating circulation pump 5 in the middle of the pipe connecting the hot water storage tank 1 and the heat pump unit 2, draws water from the inner and lower parts of the hot water storage tank 1, and heats it with the heat pump unit 2. By continuing the operation of returning to the upper part of the hot water storage tank 1, the water in the hot water storage tank 1 gradually boils to high temperature water.

Next, the hot water supply operation will be described.
When the hot water supply tap 12 is opened, water is supplied from the water supply pipe 7, flows into the lower part of the hot water storage tank 1, passes through the water supply bypass pipe 9, and the high temperature water extruded from the upper part of the hot water storage tank 1 and the water supply of the water supply bypass pipe 9 are the hot water supply mixing valve. Hot water that has been mixed at No. 10 and adjusted so that the set temperature for hot water supply and the temperature detected by the hot water supply thermista 13 are the same is supplied from the hot water tap 12.

In addition, the operation of various appliances for hot water filling operation will be described.
When the hot water filling switch of the operation unit 29 of the remote control 28 in the bathroom and the remote control 33 outside the bathroom is pressed, the control device 27 opens the hot water filling valve 24, supplies water from the water supply pipe 7, and flows into the lower part of the hot water storage tank 1. The high-temperature water extruded from the upper part of the hot water storage tank 1 and the water supplied by the water supply bypass pipe 9 are mixed by the hot water supply mixing valve 10 through the water supply bypass pipe 9, and the bath set temperature and the temperature detected by the bath temperature sensor 21 are the same. Hot water filling is started when the hot water adjusted so as to flow into the bathtub 3. Then, the bath flow rate sensor 25 detects the flow rate, and when the total integrated value of the flow rates flows by the set amount of the hot water filling, the control device 27 closes the hot water filling valve 24 to complete the hot water filling operation. Then, it shifts to the automatic heat retention operation that automatically keeps the bath temperature warm.

Further, by storing the cross-sectional area of the bathtub 3, the amount of hot water filling can be obtained from the cross-sectional area of the bathtub and the detected value of the water level sensor 22, so that the bathtub 3 can be transported from the two bath pipes at once. Filling with hot water, checking the current water level after filling with both hot water, and then filling the rest with hot water so that the set amount of hot water is stored, so that the hot water is filled with one-sided transport and the flow rate flows by the bath flow sensor 25. It is possible to shorten the time required to complete the hot water filling operation compared to the total.

Next, the calculation of the cross-sectional area of the hot water filling operation of the present invention will be described in detail based on the flowchart of FIG.
First, when the hot water filling switch of the operation unit 29 of the in-bathroom remote control 28 and the outdoor remote control 33 is operated (S1 is Yes), the control device 27 opens the hot water filling valve 24 and starts controlling the hot water filling operation. Then (S2), it is confirmed whether the count of the bathtub cross-sectional area stored in the storage means 37 counted in the counting means 38 is 2 or more (S3), and if the count is less than 2 (S3 is NO), the bathtub 3 is still in use. Since the learning of the cross-sectional area is insufficient, the set amount of hot water filling is determined to be a constant amount (180 L in this case) (S4) so that the set bath temperature and the temperature detected by the bath temperature sensor 21 are the same. The hot water filling is started at the temperature adjusted to (S5).

Then, when the flow rate sensor 25 detects the flow rate and the total integrated value of the flow rates flows by a predetermined amount (S6 is Yes), the cross-sectional area calculation means 36 fills the water with a predetermined amount and a predetermined amount. The water level of the bathtub at that time is maintained, and the control device 27 receives the determination result of the entry determination means 34.

At this time, when the room entry determination means 34 determines that there is room entry (S7 is Yes), the cross-sectional area of the bathtub 3 is not calculated (S8), the flow rate flowing is detected by the bath flow rate sensor 25, and the flow rate flows. When the total integrated value of the above flows by the set amount of hot water filling, the control device 27 closes the hot water filling valve 24 to complete the hot water filling operation (S9 is Yes), and the fact that the hot water filling operation is completed is completed in the bathroom. Notification is performed by the notification unit 31 of the remote control 28 and the remote control 33 outside the bathroom (S10).

In this way, when the entry determination means 34 determines that there is a room, the cross section calculation means 36 does not calculate the cross section, so that the user enters the bathroom and the bathtub is filled with water. It is possible that bathing or hot water has been taken, and by not calculating the cross section of the bathtub with low reliability, only the cross section of the bathtub with high reliability can be calculated.

In addition, the reason why the determination result of the room entry determination means 34 is accepted after the total integrated value of the flow rate exceeds a predetermined amount is that the user confirms that the bathtub 3 is unplugged immediately after the start of the hot water filling operation in the bathroom. Since there is a possibility of entering the room, it is possible to calculate a convenient cross-sectional area by accepting the determination result of the entry determination means 34 after exceeding the predetermined amount of hot water filling.

Further, when the room entry determination means 34 does not determine that the room is in (S7 is No), the bath flow rate sensor 25 detects the flow rate, and the total integrated value of the flow rate flows by the set amount of hot water filling. , The control device 27 completes the hot water filling operation by closing the hot water filling valve 24 (S11 is Yes), and the cross-sectional area calculation means 36 determines the amount of difference between the hot water filling set amount and the predetermined amount and the hot water. The cross-sectional area of the bathtub 3 is calculated from the difference between the water level when the tension setting amount is filled with hot water and the water level when the predetermined amount is filled with hot water (S12).

Then, the storage means 37 stores the cross-sectional area of the bathtub 3 calculated by the cross-sectional area calculating means 36 (S13), increments the cross-sectional area storage count by +1 by the counting means 38 (S14), and completes the hot water filling operation. This is notified by the notification unit 31 of the in-bathroom remote controller 28 and the out-of-bathroom remote controller 33 (S10).

In this way, the cross-sectional area of the bathtub 3 has a structure that increases as the height of the bathtub 3 increases, and since the bathtub 3 has steps such as an armrest, the cross-sectional area is calculated. The cross-sectional area of the bathtub 3 is determined by using the amount of difference between the set amount of hot water and the predetermined amount, and the difference between the water level when the set amount of hot water is filled and the water level when the set amount of hot water is filled. By calculating, by memorizing the average value of the cross-sectional area around the water level when the hot water filling operation is completed, it is possible to memorize the appropriate cross-sectional area based on the structure of the general bathtub 3.

Further, it is confirmed whether the count of the bath cross-sectional area stored by the storage means 37 counted in the counting means 38 is 2 or more (S3), and when the count is 2 or more (S3 is NO), the remote control 28 in the bathroom and The set amount of hot water filling set by the remote control 33 outside the bathroom is determined (S15), the flow rate is detected by the bath flow rate sensor 25, and when the total integrated value of the flowing flows flows by the set amount of hot water filling, the control device. The hot water filling operation is completed by 27 closing the hot water filling valve 24 (S16 is Yes), and the notification unit 31 of the in-bathroom remote control 28 and the out-of-bathroom remote control 33 notifies that the hot water filling operation is completed (S16 is Yes). S10).

In this way, the cross-section of the bathtub 3 does not change over time unless the bathtub 3 is replaced, and the cross-sections of a plurality of times (here, twice) may be memorized and memorized. If it is confirmed that the counting means 38 has stored a plurality of times, the time required to complete the hot water filling operation can be shortened by omitting the flow of calculating the cross section.

It should be noted that the present invention is not limited to the present embodiment and does not prevent modification without changing the gist. For example, this time, the heat pump type hot water storage water heater was used, but the hot water storage tank 1 A water heater equipped with a heater inside or a water heater that heats hot water with a heat source such as a burner may be used.

Further, the cross-sectional area of the bathtub 3 can be calculated from the detected water level of the water level sensor 22 when the hot water filling operation is completed and the total hot water filling amount detected by the bath temperature sensor 25 when the hot water filling operation is completed.

Further, although not shown in the flow of FIG. 2, if a disturbance such as a plug in the bathtub 3 occurs and the water level detected by the water level sensor 23 is an abnormal water level that can be determined to be abnormal, the cross-sectional area is stored. By not performing the above, the reliability of the calculation of the cross section can be improved.

1 Hot water storage tank 3 Bathtub 22 Water level sensor 25 Bath flow rate sensor 27 Control device 28 In-bathroom remote control 32 Human sensor 33 Out-of-bathroom remote control 34 Entering judgment means 35 Hot water filling operation control means 36 Cross-sectional area calculation means 37 Storage means 38 Counting means

Claims (4)

A water level sensor that detects the water level in the bathtub, a bath flow sensor that counts the amount of hot water filled in the bathtub, a human sensor that detects the movement of a person in the bathroom, and a hot water filling means that supplies hot water to the bathtub. With and
A predetermined amount of hot water is supplied through a room entry determination means for determining whether or not a person has entered the bathroom based on the detection result of the human sensor and a pipe communicating with the bathtub. A control device provided with a hot water filling operation control means for performing a hot water filling operation, and a cross-sectional area calculating means for calculating the cross-sectional area of the bathtub from the detected value detected by the water level sensor and the detected value detected by the bath flow rate sensor. In the bath hot water supply device equipped with
The cross-sectional area calculation means of the control device does not calculate the cross-sectional area this time when the room entry determination means determines the entry of a person between the start of the hot water filling operation and the completion of the hot water filling operation. When the room entry determination means does not determine the entry of a person between the start of the hot water filling operation and the completion of the hot water filling operation, the bath hot water supply is calculated this time. apparatus. The control device does not accept the determination result of the room entry determination means from the start of the hot water filling operation to a predetermined amount lower than the hot water filling set amount or from the start of the hot water filling operation to a predetermined time. A claim characterized in that, when the predetermined amount or the predetermined time is exceeded, it is determined whether to calculate the cross-sectional area or not to calculate the cross-sectional area based on the determination result of the room entry determination means. Item 1. The bath water heater according to item 1. The cross-section calculation means is the amount of difference between the hot water filling set amount and the predetermined amount, and the water level difference between the water level when the hot water filling set amount is filled with hot water and the water level when the predetermined amount of hot water is filled. The bath water heater according to claim 2, wherein the cross section is calculated from the above. The control device is provided with a storage means for storing the cross-section area calculated by the cross-section area calculation means and a counting means for counting the number of times stored in the storage means, and when the count of the counting means is equal to or more than a predetermined count. The bath hot water supply device according to any one of claims 1 to 3, characterized in that the cross-sectional area is not calculated by the cross-sectional area calculating means.

Images