JP3739866B2 - Bath water cleaning equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bath water purifier.
In recent years, bath water purifiers that keep the bathtub hot water clean by repeating the process of pumping the hot water from the bathtub and passing it through a predetermined purification mechanism and then returning it to the bathtub again are widely used. In such a bath water purifier, the bath water is forcibly circulated by a circulation pump, and is filtered by activated carbon or sterilized by ozone or the like, and at the same time is kept at a predetermined temperature by an electric heater. It is normal.
[0002]
[Problems to be solved by the invention]
However, in the conventional purification apparatus, in order to keep hot water at an appropriate temperature, it is necessary to always perform heating with an electric heater, and there is a problem that the running cost becomes expensive.
Therefore, in recent years, a system has been proposed that heats bath water in a heat storage tank using a low-cost heat source such as midnight power, stores the water, and supplies it to a bathtub as appropriate.
In the case of such a system, it is advantageous to heat up to as high a temperature as possible to save the amount of heat that can be used for heat retention, but in general, it is heated to about 90 ° C. in consideration of safety. For this reason, a temperature sensor is attached to the heat storage tank, and heating control is performed for heating to the target temperature based on the detection value of this sensor.
However, when the above temperature sensor fails or when the temperature detection of the sensor is not performed properly, the heating control of the heat storage tank is not performed normally. Bath water may boil. As a factor that the temperature detection is not properly performed, there is a case where moisture has entered from the outside for some reason and the sensor has become wet. The boiling temperature also varies depending on the altitude in the area where the device is installed and the pressure difference due to the weather.
When the inside of the heat storage tank boils, a large amount of steam (gas) is generated in the upper part of the heat storage tank, the internal pressure of the upper part becomes high, the internal hot water is pushed out, and is discharged into the bathtub through the circulation path. If the boiling state continues further, hot water in the heat storage tank is further released into the bathtub, and there is a risk that the temperature in the bathtub becomes abnormally hot.
The object of the present invention is to solve the above-mentioned problems of the prior art.
[0003]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a bath water cleaning apparatus for purifying bath water by circulating it between a bathtub and a cleaning mechanism using a circulation mechanism , and introducing the circulating bath water as necessary. Means for heating and storing to a predetermined temperature, means for supplying hot water of a predetermined temperature from the means for storing to the bathtub when the bath water needs to be heated, and the temperature of the bath water in the bathtub Means for detecting on the inlet side to the means for storing from the means, means for detecting the temperature of the bath water from the means for storing on the outlet side to the bathtub, and bath water in the means for storing The means for comparing the bath water temperature detected by the two detecting means during heating and when the supplying operation by the supplying means is not performed, and the result of the comparison The temperature detected on the inlet side is detected on the incoming water side. If the temperature is higher than the detected temperature, the means for stopping the bath water heating in the means for storing and the temperature detected on the water outlet side as a result of the comparison are higher than the temperature detected on the water inlet side. Means for notifying, and, as a result of the comparison, when the temperature detected on the water outlet side is higher than the temperature detected on the water inlet side, means for prohibiting the circulation mechanism from stopping. .
In the above configuration, the means for storing performs a heating operation at an appropriate time to store the heated hot water, so that, for example, midnight power can be used, and the cost required for heating can be reduced. And in the heating in the means for storing, the temperature of the inflow side and the outflow side is detected in a state where the supply operation is not performed, and it is detected whether there is a temperature difference. It is determined that the hot water is released from the means, the heating is stopped, and a notification to that effect is given.
At this time, if the circulation mechanism is suddenly stopped, there is a danger that hot water will flow back into the bathtub .
Furthermore, after making the notification, it is also possible to operate the supplying means for a certain period of time so that the steam is discharged into the bathtub and the pressure in the storing means is reduced.
[0004]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 1, a main body 1 is usually installed outdoors, and is connected to a bathtub 2 by a water inlet pipe 3 and a water outlet pipe 4. A user selects operation / stop and whether or not to keep the bath water warm, sets the bath warming temperature, and the like by the remote controller 5 attached to the wall surface of the bathroom. The remote controller 5 is connected to a control board 6 in the main body by a cord, and displays an operation state, hot water temperature, time, various warnings, etc. in the main body. A water absorption port 8 incorporating a pre-filter 7 is connected in the bathtub at the end of the water intake pipe 3, and bath water from which hair has been removed is sucked into the main body.
[0005]
A circulation pump 9 is installed in the other main body of the water inlet pipe 3, and a check valve for water is provided in the middle of the water inlet pipe 3 so that bath water in the main body does not return to the bathtub when the circulation pump is stopped. 10 is attached. The outlet side of the circulation pump 9 is connected to a filter medium tank 12 through a throttle 11. The outlet side of the filter medium tank 12 is connected to the water inlet side below the heat storage tank 13 via a heating valve 27. The warming valve 27 is a switching valve having a water discharge side divided in two directions, one connected to the water discharge pipe 4 and the other connected to the heat storage tank 13 and the mixing valve 17. The heating valve 27 is normally connected to the water discharge pipe 4 side, but is connected to the heat storage tank 13 side when heating is required, and bath water is supplied to the heat storage tank 13 from the lower side, and at the same time, mixing is performed. Bath water is supplied to the valve 17.
[0006]
The filter medium tank 12 contains a filter medium 15 such as a ceramic ball or activated carbon to purify the bath water.
Further, the circulation pump 9 is provided with a water shortage sensor 14 in parallel so that a decrease in the level of the bath water can be detected. The water shortage sensor 14 is of a type that detects the differential pressure of the circulation pump 9, and one tube is connected to the water input side of the circulation pump 9 and the other tube is connected to the water discharge side of the circulation pump 9.
[0007]
A heat storage heater 18 and a heat storage tank lower hot water temperature sensor 19 are attached to the lower part of the heat storage tank 13, and the bath water in the tank is heated to a predetermined temperature by using late-night power to make hot water. Since the density of bath water (about 40 ° C.) and hot water is different, hot water is discharged from the heat storage tank 13 by the amount of bath water that has entered the heat storage tank 13, and the bath water and hot water are stored in the heat storage tank 13. Do not mix. The upper part of the heat storage tank 13 is connected to the other incoming water side of the mixing valve 17 by a hose. The mixing valve 17 adjusts an internal valve for the bath water introduced through the heating medium 27 through the filter medium tank 12 and the hot water coming out from the upper part of the heat accumulator 13, to an appropriate predetermined value. The water temperature is raised and discharged from the jet nozzle 21 to the bathtub 2 through the water discharge pipe 4.
In this embodiment, a heat storage tank upper hot water temperature sensor 29 is provided on the upper part of the heat storage tank 13,
Thereby, the temperature of the hot water storage is detected.
The heating valve 27 and the mixing valve 17 are controlled by the control board 6 as described later.
[0008]
The control board 6 is provided with a heating control device 26 to perform heating control.
An incoming water temperature sensor 20 is attached to the incoming water pipe 3 to detect the incoming water temperature. When the incoming water temperature detected by the incoming water temperature sensor 20 is lower than the heat retention temperature set by the user, the warming valve 27 is switched to the heat storage tank 13 side, and the bath water is mixed with the heat storage tank 13 and the mixing valve 17. And to supply. And the opening degree of the mixing valve 17 is adjusted, bath water and the hot water from the heat storage tank 13 are mixed, it is set as predetermined temperature, and it is comprised so that it may discharge to a bathtub. When the bath water temperature exceeds a predetermined value (about 0.5 ° C) from the heat retention temperature, the warming valve 27 is switched to the outlet pipe 4 again, and the bath water from the filter medium tank 12 is directly supplied to the outlet pipe 4. It is designed to circulate. These controls are performed by the heating control device 26. The valve of the mixing valve 17 is controlled by a pulse motor or the like, and has a built-in phase detection sensor for determining its initial phase as shown in FIG. A discharge water temperature sensor 22 is attached to the discharge side of the mixing valve 17 to detect the discharge temperature of the discharged bath water.
[0009]
The heating control device 26 is configured to execute heating by the heat storage heater 18 in a predetermined time that is predetermined, in this embodiment, at midnight power hours. At this time, it is confirmed that the heating valve 27 and the mixing valve 17 are not heated by the hot water supply operation, and the detected temperatures from the incoming water temperature sensor 20 and the outgoing water temperature sensor 22 are compared. The presence or absence of a temperature difference is detected. That is, if the temperature of the outlet water temperature sensor 22 is higher than the temperature of the inlet water temperature sensor 20 when the heating operation is not performed, overheating occurs in the heat storage tank 13, and hot water discharge phenomenon due to pressurization occurs. It comes to judge that. When there is no temperature difference between the water outlet side and the water inlet side, heating is continued.
[0010]
If it is determined that there is a temperature difference between the incoming water temperature sensor 20 and the outgoing water temperature sensor 22 and that hot water is released, the heating control device 26 stops the heat storage heater 18 and notifies the remote controller 5 to that effect. Is displayed, and a warning sound by a buzzer is generated.
Next, the heating control device 26 prohibits the circulation pump 9 from being stopped, and does not stop the circulation pump 9 even if the user performs a stop operation of the circulation pump 9 by the remote controller 5. At this time, there is steam in the heat storage tank 13, and the pressure is maintained in a state balanced with the pressure when the circulating pump 9 is circulating the bath water. When the circulating pump 9 is stopped in this state, This is because the pressure balance is lost and the hot water in the heat storage tank 13 is discharged to the bathtub 2 and is very dangerous.
[0011]
The heating control device 26 issues a warning and informs the user of an abnormal situation, and then controls the heating valve 27 and the mixing valve 17 to perform a heating operation for a certain period of time, whereby the steam in the heat storage tank 13 is stored in the bathtub. 2 and the circulation pump 9 is stopped after the pressure is lowered.
As a result, it is possible to avoid accidents such as the release of hot water and escape from a dangerous state.
[0012]
The jet solenoid valve 23 and the ozone generator 24 are connected to the jet nozzle 21 via the air tube 25. During a clean operation other than bathing, the jet solenoid valve 23 and the ozone generator 24 are turned on, Air mixed with ozone is discharged from the jet nozzle 21 to sterilize the bath water. When bathing, the ozone generator 24 is turned off, and the jet solenoid valve 23 is turned on and off with the jet key of the remote controller 5 so that the presence or absence of the jet can be selected. The jet nozzle 21 has a narrow inner diameter so that air is mixed therein.
[0013]
FIG. 2 shows an electric block diagram.
The remote controller 5 is connected to the control board 6 in the main body 1 by a communication code 101, and is connected to the CPU 103 via the communication interface 102. The CPU 103 is a one-chip microcomputer incorporating a ROM and a RAM. Based on information from the key 104 and the CPU 201 in the control board, a predetermined display and a warning of the danger of hot water discharge are displayed on the LCD 106 and the LED 107 via the driver 105, and a buzzer 108 is sounded. ing. The key 104 includes an operation key, a jet key, a bathing key, a heat retention key for selecting whether to perform heat retention, a heat retention temperature setting key, and the like.
[0014]
The control board 6 in the main body includes a water shortage sensor 14, an incoming water temperature sensor 20, an outgoing water temperature sensor 22, a heat storage tank lower water temperature sensor 19, a heat storage tank upper water temperature sensor 29, and a phase detection sensor for the mixing valve 17. And the like, the heat storage heater 18 that is an output device, the circulation pump 9, the ozone generator 24 that is a sterilizer, the electromagnetic valve 23 for jetting, the heating valve 27, the mixing valve 17 and the like are connected via a relay, a driver, or the like. Yes. And AC100V via AC100V AC power supply side earth leakage breaker 202, transformer 203 and AC200V midnight power side earth leakage breaker 204 are connected.
[0015]
Next, the inside of the control board 6 will be described.
The DC power supply 205 receives the transformer secondary voltage and generates the circuit voltage Vcc (+5 V), Vd (+12 V) which is the power supply for the sterilizer and the jet solenoid valve, and Vb (+36 V) which is the power supply for the stepping motor of the mixing valve 17. is doing. The communication code 101 from the remote controller 5 side is connected to the CPU 201 via the communication interface 206, and exchanges information with the CPU 103 on the remote controller side. Each of the hot water temperature sensors 20, 22, 19, and 29 is connected to the AD input terminal of the CPU 201 via the voltage converter 207 so that the voltage changes over a necessary temperature range.
[0016]
The energization start detector 208 detects the start of energization of the midnight power AC200V, and the heating control device 26 makes a predetermined determination, and the driver 209 controls the heat storage heater relay 210. When the start of energization is detected (11:00 pm) and it is determined that heating is possible, the hot water temperature at the lower part of the heat storage tank 13 from the heat storage tank lower hot water temperature sensor 19 is checked, and the hot water in the heat storage tank is boiled to a predetermined temperature. The energization time required to increase the time is calculated to determine the ON time T of the relay 210. If no hot water remains in the heat storage tank 13 and all have the same hot water temperature as the lower part of the heat storage tank 13, the relay 210 is turned on with a delay of (8-T) hours from 11:00 pm, and thereafter the lower part of the heat storage tank The heat storage heater 18 is energized until the hot water temperature sensor 19 detects a predetermined temperature.
[0017]
After confirming that the heating control device 26 is not in a heating operation by switching the heating valve 27 to the heat storage tank 13 side as described above, the heating control device 26 receives from the incoming water temperature sensor 20 and the outgoing water temperature sensor 22. The detected temperatures are constantly compared, and the determination of the hot water release risk described above is executed. If there is no danger, the heating by the regenerative heater 18 is continued. If there is a danger, the heating by the regenerative heater 18 is stopped, a notification to that effect is given, and the emergency processing described above is performed. Yes.
[0018]
When the operation key in the remote controller 5 is pressed to enter the operation mode, the relay 211 is turned on and the circulation pump 9 is energized to circulate the bath water. Normally, the driver 212 is turned on and the ozone generator 24 is operated to sterilize the bath water. However, when the bath key in the remote control is pressed, the bath mode is entered and the driver 212 is turned off for one hour to sterilize the device. The user is not exposed to ozone.
[0019]
When the jet key is pressed during the bathing mode, the driver 213 is turned on to energize the jet solenoid valve 23, and air is supplied to the jet nozzle so that a water flow with bubbles can be enjoyed. When the button is pushed again, the driver 213 is turned off and the water flow is free from bubbles. In addition, after the bathing key is pressed, the mode is automatically switched to the clean mode after one hour, the driver 212 and the driver 213 are turned on, the air mixed with ozone is given to the jet nozzle, and the bath water is sterilized.
[0020]
When the power is turned on, the motor in the mixing valve 17 is moved to receive the signal from the phase detection sensor and perform initial setting. While the circulating pump 9 is in operation, the heat retention temperature set by the temperature setting key in the remote controller is compared with the detected temperature of the incoming water temperature sensor 20, and the motor in the mixing valve 17 is operated to adjust the valve to bath water. It is comprised so that temperature may be controlled in the range of heat retention temperature-heat retention temperature +0.5 degreeC.
Reference numeral 216 stores the setting values such as the heat retention temperature and the operation mode set by the user in the EEPROM so that they do not need to be reset when the power is turned on again after a power failure.
[0021]
The heating operation described above will be described with reference to FIG.
When the midnight power time is reached, energization of the heat storage heater 18 is started (step S1), and it is checked whether the heating valve 27 is switched to the heat storage tank 13 side to perform a heating operation (step S2). If not, the temperatures of the outlet water temperature sensor 22 and the incoming water temperature sensor 20 are compared (step S3). When the temperature on the outlet side hot water temperature sensor 22 side is higher than the incoming water temperature, the energization of the heat storage heater 18 is stopped (step S4), and an abnormality occurrence warning is executed (step S5). At the same time, stop of the circulation pump 9 is prohibited, and the operation of the circulation pump 9 is continued even if the user or the like performs the operation of stopping the circulation pump 9 (step S6). Then, the heating valve 27 is switched to the heat storage tank 13 side for a predetermined time, the steam in the heat storage tank 13 is released to the bathtub 2 side, the internal pressure is lowered (step S7), and then the circulation pump 9 is stopped (step S8). ).
If the outlet water temperature is not higher than the incoming water temperature in step S3, heating of the heat storage tank 13 is continued. When the temperature reaches a predetermined temperature (90 ° C.) (step S9), the energization of the heat storage heater 18 is stopped (step S10).
[0022]
【The invention's effect】
As described above, according to the bath water purification apparatus of the present invention, since midnight power or the like can be used as a heating heat source in the means for storing, the cost required for heating can be reduced, and the running cost can be reduced. Even if overheating or the like occurs in the storage means, there is an effect that it can be safely processed.
[Brief description of the drawings]
FIG. 1 is a schematic block diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a main body 1, a remote controller 5, and a control board 6 in an embodiment of the present invention.
FIG. 3 is a flowchart for explaining the operation of the embodiment of the present invention.
[Explanation of symbols]
1: main body, 2: bathtub, 3: inlet pipe, 4: outlet pipe, 5: remote control, 6: control board, 7: pre-filter, 8: water inlet, 9: circulation pump, 10: check valve for water, 11: Throttle, 12: Filter tank, 13: Heat storage tank, 14: Water shortage sensor, 15: Filter medium, 17: Mixing valve, 18: Heat storage heater, 19: Heat storage tank lower hot water temperature sensor, 20: Water temperature on the inlet side Sensor: 21: Jet nozzle, 22: Outlet water temperature sensor, 23: Jet solenoid valve, 24: Ozone generator, 25: Air tube, 26: Heating control device, 27: Heating valve, 29: Upper part of heat storage tank Hot water temperature sensor, 101: Communication code, 102: Communication interface, 103: CPU, 104: Key, 105: Driver, 106: LCD, 107: LED, 108: Buzzer, 201: CPU, 202: Electric leakage Breaker, 203: Transformer, 204: Earth leakage breaker, 205: DC power supply, 206: Communication interface, 207: Voltage converter, 208: Energization start detector, 209: Driver, 210: Heater relay for heat storage, 211: Relay, 212 : Driver, 213: driver, 214: driver, 215: waveform shaping circuit, 216: EEPROM, 217: driver.

Claims (2)

In the bath water cleaning device for purifying the bath water by circulating it between the bathtub and the cleaning mechanism by the circulation mechanism,
Means for introducing and heating the circulating bath water as necessary to a predetermined temperature and storing;
Means for supplying hot water of a predetermined temperature from the means for storing to the bathtub when the bath water needs to be heated ;
Means for detecting the temperature of the bath water on the incoming side to the means for storing from the bathtub;
Means for detecting on the outlet side to the bathtub from means for storing the temperature of the bath water;
For comparing the bath water temperature detected by the two detecting means during the heating of the bath water in the storing means and when the supplying operation by the supplying means is not performed. Means,
As a result of the comparison, when the temperature detected on the outlet side is higher than the temperature detected on the inlet side, means for stopping heating of the bath water in the means for storing;
As a result of the comparison, when the temperature detected on the water discharge side is higher than the temperature detected on the water input side, means for notifying that effect,
As a result of the comparison, when the temperature detected on the water outlet side is higher than the temperature detected on the water inlet side, means for prohibiting the stop of the circulation mechanism;
A bath water purifier characterized by comprising: As a result of the comparison, when the temperature detected on the water outlet side is higher than the temperature detected on the water inlet side, the means for supplying is operated for a predetermined time.
The bath water purification apparatus according to claim 1.

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