JP2021067386A - Bath hot water supply device - Google Patents

Abstract

To solve the problem that hot water of a high temperature hits a bather to make the bather feel discomfort because reheating operation is performed at timing unintended by the bather in a bath hot water supply device for performing reheating operation of heat retaining operation every interval time.SOLUTION: In a bath hot water supply device, a body control device includes operation control means for performing reheating operation for heating hot water in a bath every prescribed time to boil the hot water to a preset bath set temperature or more, determination means for determining whether to perform notification of notification means to a bather, and going-in/out of bathtub determination means for determining whether a person goes in a bathtub on the basis of pressure change detected by a water level sensor. The determination means notifies caution information from the notification means if the going-in/out of bathtub determination means determines that the bather goes in the bathtub in starting the reheating operation, and prevents the notification means from notifying the caution information if the going-in/out of bathtub determination means determines that the bather does not go in the bathtub.SELECTED DRAWING: Figure 3

Description

The present invention relates to a bath water heater, and more specifically, to a bath water heater having a built-in bath water heater that automatically reheats water (hot water) filled in a bathtub. is there.

As shown in Patent Document 1, the conventional bath heat insulating device estimates the interval time required for the heat retaining operation and the time required for the reheating operation by the bath heat insulating device, and keeps the heat at appropriate time intervals. there were.

Further, as shown in Patent Document 2, when the reheating operation is performed, the hot water in the bathtub and the hot water in the upper part of the hot water storage tank are exchanged with each other through a bath heat exchanger provided in the hot water storage tank. Was known.

Japanese Unexamined Patent Publication No. 11-193956 Japanese Unexamined Patent Publication No. 2006-064335

However, in this conventional one, when the hot water of the bathtub is sent to the bath heat circulation circuit by the circulation 5-ring pump at the start of the reheating operation, the hot water staying in the bath heat exchanger extruded by the hot water of the bathtub (80 ° C to 90 ° C) will flow into the bathtub, and if there is a person in the bathtub, there is a risk of causing discomfort due to sudden high temperature, and an interval as in Patent Document 1. In the case of the heat-retaining operation every hour, the reheating operation is performed at a timing not intended by the bather, so that there is a problem that the bather is exposed to hot water.

In order to solve the above problems, the present invention includes a main body control device communicably connected to a remote control in the bathroom having a notification means for notifying the bather of caution information, and a water level sensor for detecting the water level of the bathtub. The main body control device is provided with an operation control means for performing a reheating operation in which the hot water in the bath is heated at predetermined time intervals to boil up to a temperature equal to or higher than a preset bath set temperature, and the bather is notified of the notification means. In a bath hot water supply device provided with a determination means for determining whether or not a person has taken a bath and an entry / exit determination means for determining whether or not a person has taken a bath based on a pressure change detected by the water level sensor, the determination means is When the bathing determination means determines that there is a bath at the start of the reheating operation, the warning information is notified from the notification means, and the bathing determination means determines that there is no bathing. , The caution information is not notified from the notification means.

According to the present invention, when the determination means determines that there is a bath at the start of the reheating operation as the heat retention operation, the determination means stays in the bath heat exchanger by the start of the reheating operation. By sending the hot water that had been used to the bathtub to the bathtub, the notification means notifies the bather of caution information so that the bather does not feel uncomfortable by touching the hot water, so that the bather can take a safe bath. In addition to being able to provide it, if the bathing / exiting determination means determines that there is no bathing, there is no concern that the bather will be uncomfortable even if hot water is sent into the bathtub at the start of reheating. By not notifying the information, it is possible to prevent the use of wasteful power.

Schematic diagram showing the configuration of the first embodiment of the present invention Control function block diagram of the first embodiment A flowchart for explaining the operation of the first embodiment.

Next, the bath water heater of the first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic view showing the configuration of a bath hot water supply device, in which 1 is a hot water storage tank for storing hot water, 2 is a water supply pipe for supplying water to the bottom of the hot water storage tank 1, 3 is a hot water supply pipe for hot water to be discharged from the top of the hot water storage tank 1, and 4 is a water supply. The water supply bypass pipe 5 branched from the pipe 2 connects the hot water supply mixing valve that mixes the hot water from the hot water supply pipe 3 and the water from the water supply bypass pipe 4, and 6 connects the outlet of the hot water supply mixing valve 5 and the hot water supply tap 7. A hot water supply pipe, 8 is a hot water supply flow rate sensor that detects the flow rate of hot water flowing through the hot water supply pipe 6, 9 is a hot water supply temperature sensor that detects the temperature of hot water flowing through the hot water supply pipe 6, and 10 is a hot water supply temperature sensor that detects the temperature of the hot water supply flowing through the water supply bypass pipe 4. It is a water heater temperature sensor.

Reference numeral 11 is a bath mixing valve that mixes hot water from the hot water outlet pipe 3 and water from the water supply bypass pipe 4, and 12 is a hot water filling pipe for filling the hot water from the bath mixing valve 11 into the bathtub 13 installed in the bathroom. , 14 is a hot water filling flow sensor that detects the flow rate of hot water flowing through the hot water filling pipe 12, 15 is a hot water filling temperature sensor that detects the temperature of hot water flowing through the hot water filling pipe 12, and 16 opens and closes the flow path of the hot water filling pipe 12. A plurality of hot water filling electromagnetic valves 17 are provided above and below the side surface of the hot water storage tank 1 to detect the hot water storage temperature.

18 is composed of a stainless steel serpentine tube arranged in the hot water storage tank 1, and is a bath heat exchanger for heating the bath water in the bath 13, and 19 is a bath water circulating between the bath 13 and the bath heat exchanger 18. A bath circulation circuit that can be connected as possible, 20 is a bath circulation pump for sucking the bath water in the bath 13 and pumping it to the bath heat exchanger 18 to circulate the bath water, and 21 is for detecting the temperature of the bath water. The bath water temperature sensor 22 is a water level sensor that detects the water level in the bath 13 by detecting the water pressure, and a hot water filling pipe 12 is connected in the middle of the bath circulation circuit 19.

Since the bath heat exchanger 18 is provided near the high temperature layer of the hot water storage tank 1, the hot water in the serpentine tube is retained at a high temperature of 80 ° C. to 90 ° C. warmed near the high temperature layer of the hot water storage tank 1. Therefore, when the hot water in the bathtub and the hot water in the bath heat exchanger 18 are circulated through the bath circulation circuit 19, the hot water is sent out into the bathtub, which causes discomfort to the bather. There is a danger of, and you need to be careful.

23 is a heat pump type heating means for heating the hot water in the hot water storage tank 1, 24 is a heating circulation circuit for connecting the hot water storage tank 1 and the heating means 23 so that the hot water can be circulated, and 25 is a heating circulation pump for circulating the hot water. Is.

Reference numeral 26 denotes an extra-bathroom remote controller provided outside the bathroom, which includes a display unit 26a for notifying the operating state and setting state of the hot water supply device, a speaker 26b for outputting voice data and a notification sound, and a hot water filling operation for the bathtub 13. It is provided with a bath switch 26c for starting the reheating operation, a change switch 26d for changing the bath set temperature, and a control means 26e.

Reference numeral 27 denotes an in-bathroom remote controller provided in the bathroom, which includes a display unit 27a as a notification means for notifying the operating state and setting state of the hot water supply device, a speaker 27b as a notification means for outputting voice data, a notification sound, and the like. A bath switch 27c for starting a hot water filling operation or a reheating operation for the bathtub 13, a change switch 27d for changing the bath set temperature, a control means 27e, a bathroom temperature sensor 28 for detecting the room temperature in the bathroom, and a bathroom. It is equipped with a human sensor 29 that detects entry and exit from the room.

Reference numeral 30 denotes a main body control device for controlling the operation of the hot water supply device, which is a hot water supply flow rate sensor 8, a hot water supply temperature sensor 9, a water supply temperature sensor 10, a hot water filling flow rate sensor 14, a hot water filling temperature sensor 15, a hot water storage temperature sensor 17, and a bath water temperature. The detected values of the sensor 21, the water level sensor 22, and the bathroom temperature sensor 28 are input to control the operation of the hot water supply mixing valve 5, the bath mixing valve 11, the hot water filling electromagnetic valve 16, the bath circulation pump 20, and the heating means 23, and the bathroom. It is connected to the outside remote control 26 and the indoor remote control 27 so that necessary information can be transmitted and received. Here, the main body control device 30 has a logic circuit such as an MPU and controls the operation according to a program stored in advance while referring to the memory.

Further, the main body control device 30 is provided with a bathing / exiting determination means 31 for determining whether a person has bathed in the bathtub 3 or a person has taken a bath from the bathtub 3. Specifically, the bathing / exit determining means 31 detects the pressure change that occurs when a person takes a bath in the bathtub 13 or goes out of the bathtub 13 with the water level sensor 22, and based on the detection result, the person Judging to take a bath or take a bath. Further, when the detected value of the water level sensor 22 increases at the time of bathing and the increasing state continues, it is determined that the person is taking a bath.

Further, the main body control device 30 is provided with an operation control means 32 for performing various types of operation described later.

Next, the control function block diagram of the embodiment of the present invention shown in FIG. 2 will be described. The main body control device 30 has a high temperature in the bathtub 13 based on the determination of the bath entry / exit determination means 31 and the operating condition of the reheating control means 32. A determination means 33 for determining that hot water may be supplied is provided.

The control means 27e of the remote controller 27 in the bathroom is provided with a storage means 27f that stores in advance warning information for noting that hot water may be supplied to the bathtub 13.

A message such as "Please note that hot water comes out from the circulation port of the bath" is stored in the storage means 27f as warning information, and when instructed by the determination means 33, Notification is performed.

Next, the operation of the bath water heater of the present invention will be described.

<Boiling operation>
At the start time of a predetermined time zone (midnight time zone) where the unit price of electricity is low, the operation control means 32 causes the heating means 23 to start boiling the amount of hot water corresponding to the amount of the hot water supply load up to that point. The heating means 23 starts driving the heating circulation pump 25 to boil the hot water taken out from the lower part of the hot water storage tank 1 to heat the hot water to the target temperature, and the hot water storage tank 1 Return to the upper part, boil from the upper part of the hot water storage tank 1 and store hot water of the set temperature in a layered manner, and when the operation control means 32 boils up to the bottom of the hot water storage tank 1 or reaches the end time of the predetermined time zone, the heating means 23 is instructed to stop boiling, and the heating means 23 drives and stops the heating circulation pump 25 to end the boiling operation.

<Hot water supply>
When the hot water tap 7 is opened, city water flows into the bottom of the hot water storage tank 1 from the water supply pipe 2 and hot water flows out from the top of the hot water storage tank 1 through the hot water pipe 3 and the water supply bypass is performed by the hot water mixing valve 5. It is mixed with the water from the pipe 4 and passes through the hot water supply pipe 6. Then, when the hot water supply flow rate sensor 8 detects the minimum amount of working water or more, the operation control means 32 feedback-controls the valve opening degree of the hot water supply mixing valve 5 so that the temperature detected by the hot water supply temperature sensor 9 matches the hot water supply set temperature. Then, hot water is supplied at the set temperature. Then, when the hot water supply flow rate sensor 8 detects less than the minimum working water amount due to the hot water supply tap 7 being closed or the like, the operation control means 32 stops the feedback control of the valve opening degree of the hot water supply mixing valve 5 to stop the hot water supply. ing.

<Reheating operation>
Next, the reheating operation will be described. When the bath switch 26c of the remote control 26 outside the bathroom or the bath switch 27c of the remote control 27 inside the bathroom is operated, the operation control means 32 drives the bath circulation pump 20 to heat the bath water with the bath heat exchanger 18. Then, when it is confirmed by the bathtub water temperature sensor 21 that the temperature of the bathtub water has risen to the bath set temperature or higher, the drive of the bath circulation pump 20 is stopped, and the reheating operation is terminated.

<Automatic operation (hot water operation)>
Next, the automatic bath operation will be described. When the bath switch 26c of the remote control 26 outside the bathroom or the bath switch 27c of the remote control 27 inside the bathroom is operated, the operation control means 32 opens the hot water filling electromagnetic valve 16 and the temperature detected by the hot water filling temperature sensor 15 is a bath. The valve opening degree of the bath mixing valve 11 is feedback-controlled so as to match the set temperature, and the hot water filling operation at the bath set temperature is started.

Then, when the integrated value of the hot water filling flow rate detected by the hot water filling flow rate sensor 14 becomes the bath set hot water amount, or when the water level sensor 22 detects the bath set water level, the operation control means 32 uses the hot water filling solenoid valve. The valve 16 is closed to end the hot water filling operation, and if the heat retaining operation is set by the user, the automatic heat retaining operation is performed.

<Automatic operation (heat retention operation)>
Next, the operation of the automatic operation (heat retention operation) and the notification of caution information will be described in detail based on the flowchart of FIG.
First, the operation control means 32 confirms that the automatic heat retention is set (S1), and if the automatic heat retention is set (S1 is Yes), counts the heat retention interval of the heat retention operation (here, the heat retention interval is counted). (Perform reheating operation every 30 minutes) is started (S2).

After that, the bathing / exit determining means 31 confirms whether the bathing is determined (S3), proceeds to S4 if the bathing / exiting detecting means 31 determines that there is no bathing, and S8 if it is determined that there is bathing. Proceed to.

At this time, when the bathing / exit determining means 31 determines that there is no bathing (S3 is No) and the heat retention interval count reaches a preset predetermined count (here, 30 minutes) (S4 is Yes). The determination means 33 does not notify the caution information, and the operation control means 32 starts the reheating operation as the heat retention operation (S5).

Then, the operation control means 32 drives the bath circulation pump 20 to heat the bathtub water with the bath heat exchanger 18 to perform a reheating operation, and the bathtub water temperature sensor 21 determines that the bathtub water temperature is equal to or higher than the bath set temperature. When it is confirmed that the temperature has risen to (S6 is Yes), the drive of the bath circulation pump 20 is stopped, the reheating operation is terminated, and the heat retention interval is counted (S7). Then, it returns to S2.

Then, the operation control means 32 performs a heat-retaining operation that repeats the reheating operation to keep the hot water in the bathtub near a preset constant temperature, and then reaches a predetermined heat-retaining time (here, 3 hours) of the automatic heat-retaining operation. Then, the operation control automatic heat retention operation is completed.

Further, when the bathing / exit determining means 31 determines that there is bathing (S3 is Yes) and the heat retention interval count reaches a preset predetermined count (here, 30 minutes) (S8 is Yes), The determination means 33 notifies the caution information stored in the storage means 27f in the remote controller 27 in the bathroom (S9), and the operation control means 32 starts the reheating operation as the heat retention operation (S5).

In this way, when the bathing / exit determining means 31 determines that there is a bath at the start of the reheating operation as the heat retention operation, the determining means 33 stays in the bath heat exchanger 18 due to the start of the reheating operation. By sending caution information from the notification means so that the bather does not have a risk of touching the hot water and causing discomfort due to the hot water being sent to the bathtub 13, safe bathing is possible. You can do it.

Then, the operation control means 32 drives the bath circulation pump 20 to heat the bathtub water with the bath heat exchanger 18 to perform a reheating operation, and the bathtub water temperature sensor 21 determines that the bathtub water temperature is equal to or higher than the bath set temperature. When it is confirmed that the temperature has risen to (S6 is Yes), the drive of the bath circulation pump 20 is stopped, the reheating operation is terminated, and the heat retention interval is counted (S7). Then, it returns to S2.

Further, this caution information is notified only when the hot water in the bath heat exchanger 18 is sent to the bathtub 13 and there is a bather, so that the caution information is notified to a person in the bathtub 13. If there is no such information, no cautionary information is given, so wasteful power consumption can be suppressed.

Further, when the reheating operation as the heat retention operation is started, the hot water in the bathtub 13 becomes lukewarm with the passage of time, so that the hot water in the bathtub 13 is sent even if the hot water in the bath heat exchanger 18 is sent out. Because it mixes with the bathtub, the bath temperature becomes appropriate, and even if a person takes a bath after that, there is no unexpected high-temperature hot water, so there is no discomfort. It is easy to use without the hassle of notifying unnecessary caution information.

The present invention is not limited to the above embodiment, and can be modified without changing the gist of the invention. For example, in the present invention, the heat retention interval count, the predetermined heat retention time, the bath set temperature, etc. The temperature and time are set in, but this value may be changed as appropriate.

Further, although the hot water storage type bath hot water supply device for heating hot water by the heat pump type heating means 23 has been described as an example, for example, an instant heating type bath hot water supply device using gas or kerosene as fuel may be used.
Also, in that case, in order to reduce discomfort by sending the cold water accumulated in the pipe into the bathtub 13, the content is "Please note that cold water will come out from the circulation port of the bath." You may change it.

In addition, the alert information is notified by voice from the speaker 27b on the assumption that there is a person near the remote controller 27 in the bathroom when taking a bath, but in addition, character data is displayed on the display unit 27a of the remote controller 27 in the bathroom. There is also a method of notifying as, a notification by lighting a lamp, and the like, and the notification may be performed in some combinations.

Further, in the above embodiment of the present invention, although the heat retention operation interval is performed over time, the bypass pipe that bypasses the bath heat exchanger 18 is not provided, and the heat is kept at the bathtub water temperature of the bathtub water temperature sensor 21. When it is decided whether or not the operation is possible, the hot water in the bath heat exchanger 18 is pushed out to the bathtub 13 in order to drive the bath circulation pump 20 to detect the bathtub water temperature before the reheating operation. Therefore, there is a risk that the hot water may cause discomfort to the bather. Therefore, the caution information may be notified when the bath circulation pump 20 is driven immediately before the reheating operation.

13 Bathtub 27 Remote control in the bathroom 27a Display (notification means)
27b speaker (notification means)
27 Control means 27 Storage means 29 Person detection means 30 Main unit control device 31 Bathing / exit judgment means 32 Operation control means 33 Judgment means

Claims (1)

A main unit control device that is communicatively connected to a remote controller in the bathroom that has a notification means that notifies the bather of caution information.
Equipped with a water level sensor that detects the water level in the bathtub
The main body control device has
An operation control means for performing a reheating operation in which the hot water in the bathtub is heated at predetermined time intervals to boil up to a temperature higher than the preset bath temperature.
A determination means for determining whether or not to notify the bather of the notification means, and
In a bath water heater provided with a bathing / exiting determination means for determining whether or not a person has taken a bath based on the pressure change detected by the water level sensor.
The determination means
At the start of the reheating operation
When the bathing / exiting determination means determines that there is a bath, the notification means notifies the caution information.
A bath hot water supply device characterized in that when the bathing / exit determining means determines that there is no bathing, the warning information is not notified from the notifying means.

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