JP2914680B2 - Pipeline abnormality detection device of bathtub hot water purification device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for cleaning bath water, and more particularly to an apparatus for detecting an abnormality in a conduit of a device such as a filter clogging.

(Prior Art) A cleaning device has been developed in which bath water is circulated through a filtration device, an activated stone tank or the like using a circulation pump to remove dirt from the hot water and to activate the hot water.

More recently, more than just removing hot water stains,
It has also been practiced to use a heater to keep the hot water at an appropriate temperature for 24 hours so that it can be taken at any time.

In this case, in order to maintain the cleanliness of the hot water and to prevent the generation of offensive odor, sterilization using a small high pressure discharge type ozone generator has been performed.

In such a cleaning device, it is necessary to provide an abnormality detection device for detecting an abnormality in the pipeline such as clogging of a filter, clogging of a pipeline due to foreign matter, and failure of an air pump for supplying ozone.

A conventional abnormality detection device is provided with a pressure sensor or the like in a circulation line of hot water and directly detects a change in a flow rate of the hot water based on a change in resistance in the pipeline to detect an abnormality. Was used.

(Problems to be Solved by the Invention) However, according to the conventional abnormality detection device, the change in the flow rate of the hot water due to the change in the pipeline resistance is quite subtle, for example, the flow rate is 15.2 l / min when the filter is new. When things get pretty clogged,
The flow rate change is 13.2 l / min, which is about 2 l. To detect such a flow rate change by using a pressure sensor or the like, it is necessary to allow a considerable margin in the detection set value.

Therefore, when notifying the user of the degree of clogging of the filter, it is difficult to issue a warning after a certain degree of clogging, and then to stop the device after it becomes a problem, that is, a state of the device. I had to order a replacement.

In the conventional abnormality detection device, since the change in the flow rate of hot water is directly detected, there is no distinction between clogging on the suction side including clogging of the filter and clogging on the draining side after the cleaning process. That is, in order to know the location, it is necessary to dispose sensors at a plurality of locations in the pipeline.

The present invention eliminates the disadvantages of the prior art as described above,
The present invention has been developed with the object of providing an abnormality detection device capable of sensitively detecting the occurrence of an abnormality due to a blockage of a pipe of the device and easily identifying a location.

(Means for Solving the Problems) That is, the present invention provides a sterilizing ozone inhaler 12 for sucking sterilizing ozone into hot water in a circulation path of the bathtub hot water 2 using a circulation pump 7, A sealed gas-liquid separation tank 14 for collecting reaction ozone, and an exhaust ozone suction device 29 for sucking the collected exhaust ozone into hot water returning to the bathtub 1 and exhausting the ozone are sequentially provided from the upstream side. The other end of the ozone supply pipe 18 connected to the ozone generator 17 at one end is connected via an electromagnetic valve 20.One end of the ozone supply unit 14a of the gas-liquid separation tank 14 is connected to the exhaust ozone suction device 29. The other end of the ozone exhaust pipe 26 to be connected is connected via an electromagnetic valve 27, and the electromagnetic valve 2 is connected to the collected ozone storage portion 14a of the gas-liquid separation tank 14.
In the bathtub hot water purifier for opening and closing 0 and 27 to recover a predetermined amount of unreacted ozone and exhausting the gas, the control device 34 as a pipe abnormality detection device is provided in the recovered ozone storage section of the gas-liquid separation tank 14. Each time required to collect and exhaust a predetermined amount of unreacted ozone, that is, the intake time and exhaust time of the recovered ozone, is measured by a built-in timer, and based on the intake time and the exhaust time of the recovered ozone, a line abnormality is detected. This is a pipeline abnormality detection device for a bathtub hot water purification device, characterized in that

(Operation) The present invention is configured as described above, and a suction time and a discharge time of a predetermined amount of collected ozone in a gas-liquid separation tank for separating and recovering unreacted ozone in hot water and exhausting the unreacted ozone are determined by a pipe line. It changes depending on the pressure, and the gas-liquid separation tank uses the principle of increasing the exhaust time on the hot water side, that is, increasing the suction time on the drain side, and conversely, using the principle of increasing the suction time, It is to detect properly.

(Embodiment) The bathtub hot water purifying apparatus of the present invention is as shown in FIG. 1, in which hot water 2 in a bathtub 1 is sucked up by a hot water suction pipe 33, and various cleaning processing means are collectively unitized to form a unit. Forcibly circulated through the processing unit 3 to discharge the hot water after the cleaning treatment into the bathtub 1 as a natural flow through a drain pipe 28, or to jet it as a jet stream from a jet nozzle 31 at the tip of a jet jet pipe 30. Or let them do that.

The cleaning unit 3 includes a filtering device 4 having a built-in filter 5 for removing dirt, a circulating pump 7 for forced circulation, a heating device 9 for keeping the hot water constantly at an appropriate temperature for 24 hours bathing, Activated stones 15 and the like, which are filled with activated stones 15 for the chemical treatment and have a resistance to the flow of hot water and also function as a gas-liquid separation tank, are connected pipes 6, 8, 10, and 13.
Are connected to each other through the like and are arranged in series.

Reference numeral 11 denotes a three-way valve, from which a jet ejection pipe 30 branches directly to the bathtub 1, and a jet nozzle 31 to which an intake pipe 32 is connected is mounted at the tip of the jet ejection pipe 30.

Reference numeral 12 denotes a venturi-type ozone inhaler, in which air from an air pump 16 is partially ozonized by an ozone generator 17, and an ozone supply pipe 1 provided with a check valve 19 and a solenoid valve A20.
Inhaled through 8.

Reference numeral 21 denotes an ozone inhaler 12 that connects an ozone inhaler 12 with a collected ozone reservoir 14a of an activated stone tank 14 that also functions as a gas-liquid separation tank for collecting unreacted ozone of ozone inhaled into the hot water. This is a collection ozone supply pipe tied through B22 and consumed for sterilization treatment to reduce the concentration after exhausting the collected ozone without directly exhausting it.

Reference numeral 23 denotes a water level detection pipe for detecting the water level in the activated stone tank 14, and the water level detection pipe 23 includes a lower float switch 25 for detecting a lower water level B, which is a lower limit of a water level falling with the recovery of ozone. And an upper float switch 24 for detecting an upper water level A, which is an upper limit of a water level that rises with the exhaustion of the collected ozone.

Reference numeral 26 denotes an ozone exhaust pipe for exhausting a predetermined amount of ozone collected in the collected ozone storage section 14a of the activated stone tank 14. One end of the ozone exhaust pipe 26 is connected to the active stone tank 14 via an electromagnetic valve 27. The other end is connected to a recovered ozone storage part 14a, and the other end is connected to a venturi type exhaust ozone suction device 29 provided in a drain pipe 28 extending from the activated stone tank 14 to the bathtub 1.

Numeral 34 denotes a control device for performing various controls of the cleaning unit 3, which will be described in detail later. The control device controls the temperature of the heating device 9, opens and closes the solenoid valves A20, B22, and C27, and performs sterilization. Control for switching the supply of ozone to the ozone inhaler 12 from the ozone supply pipe 18 and from the recovered ozone supply pipe 21, and the recovered ozone storage section 14a of the activated stone tank 14
A predetermined amount of unreacted ozone is collected, and the collected ozone is exhausted from the ozone exhaust pipe 26, and the time required for the collected ozone to accumulate in the collected ozone storage section 14a of the activated stone tank 14 and the accumulated amount of ozone are determined. The time required for exhausting the collected ozone, that is, the intake time and the exhaust time of the collected ozone, is measured, and various controls such as a control for judging a pipe abnormality based on the intake time and the exhaust time of the collected ozone are performed. .

The block diagram of the configuration of the control device 34 is as shown in FIG. 2 and the operation panel thereof is as shown in FIG. 3, and the operation and control of the device will be described with reference to these drawings.

The hot water 2 in the bathtub 1 sucked up by the hot water suction pipe 33 by the operation of the circulation pump 7 enters the filtering device 4, where dirt such as dirt and hair is removed.

When the filtration is completed, it enters the heating device 9 through the connecting pipe 6, the circulation pump 7, and the connecting pipe 8, and is heated to a predetermined temperature.
It enters the three-way valve 11 via the connecting pipe 10.

In this case, if the jet (strong) 35 or the jet (weak) 36 key on the operation panel is pressed to select jetting of the jet jet into the bathtub 1, the driving circuit 41 drives the stepping motor 42. The three-way valve 11 rotates, and the hot water flows toward the jet ejection pipe 30 without performing a subsequent cleaning process.

However, since the three-way valve 11 is normally switched to the natural circulation side, the hot water flows toward the ozone suction device 12 and enters the activated stone tank 14 via the connecting pipe 13.

The hot water that has entered the activated stone tank 14 gushes from the tip of the connecting pipe 13 that protrudes above the packed bed of activated stone 15, flows downward while being activated by the activated stone 15, and goes to the drain connected to the bottom surface. The hot water pipe 28 is discharged into the tank 1 as it is.

In this case, the solenoid valves 20, 22, 27 provided in the ozone supply pipe 18, the recovered ozone supply pipe 21, and the ozone exhaust pipe 26 respectively close the solenoid valves A20 and B22 by the control circuit 44, and the solenoid valve C
27 is controlled to open, the inside of the activated stone tank 14 is released to the atmospheric pressure, and the packed bed of the activated stone 15 gives resistance to the flow of hot water. Accumulates.

When the hot water accumulates in the activated stone tank 14 and the water level reaches the upper water level A indicated by the dotted line, the upper float switch 24 detects this and sends this signal to the CPU 46, and the electromagnetic wave is controlled by the control circuit 44 based on a command from the CPU 46. Valve A20 opens, solenoid valve B
22 remains closed and the solenoid valve C27 closes.

When the upper float switch 24 is turned on, a timer A45 for measuring an intake time, which is a time for collecting a predetermined amount of ozone in the activated stone tank 14, starts operating.

When the solenoid valve A20 opens, the air pump 16 and the ozone generator 17 operate, and the ozone supply pipe for the ozone suction device 12 is opened.
The supply of ozone via 18 is started, and the unreacted ozone in the gas-liquid separated hot water gradually accumulates in the recovered ozone storage portion 14a in the closed activated stone tank 14.

In the activated stone tank 14, the pressure increases as the collected ozone accumulates, and the water level gradually decreases.When a predetermined amount of ozone accumulates, the water reaches the lower water level B shown by the solid line, where the lower float switch 25 switches this. Upon detection, a detection signal is sent to the CPU 46, and the solenoid valve A20 is closed, the solenoid valve B22 is opened, and the solenoid valve C26 remains closed under the control of the control circuit 44.

Activated stone tank 14 by turning off lower float switch 25
The end of the inhalation of a predetermined amount of ozone within the timer A4
The detected ozone intake time is thus measured.

If a predetermined amount of ozone is collected in the activated stone tank 14 and the exhaust is immediately performed, high-concentration ozone is discharged into the bathtub 1 together with the hot water. It consumes and exhausts the air with low concentration.

Then, when the solenoid valve B22 is opened, the recovered ozone supply pipe 2
The ozone accumulated in the collected ozone storage section 14a of the activated stone tank 14 from 1 is sent to the bacterial ozone inhaler 12, and sterilized for a time set in the timer B43.

As a result, the recovered ozone storage section 14a of the activated stone tank 14
The ozone concentration at decreases as the circulation through the ozone inhaler 12 is repeated, and the timer B4
When the time set at 3 is reached, the concentration becomes low without any problem even if it is discharged into the bathtub 1.

When the sterilization treatment with the collected ozone as described above for the time set in the timer B43 is completed, the solenoid valve A20 is kept closed by the control of the control circuit 44, and the solenoid valve B22 is closed.
The solenoid valve C27 is opened.

As a result, the collected ozone in the collected ozone storage section 14a of the activated stone tank 14 is sucked into the drain pipe 28 from the exhaust suction device 29 via the ozone exhaust pipe 26 and is exhausted.

As the collected ozone in the collected ozone storage section 14a of the activated stone tank 14 is exhausted, the pressure in the activated stone tank 14 decreases, so that the water level gradually rises and eventually reaches the upper water level A indicated by the dotted line. As described above, the upper float switch 24 detects this, the solenoid valve A20 opens, and the solenoid valve B22
Then, the solenoid valve C27 is closed, and the supply of ozone from the ozone generator 17 to the sterilizing ozone inhaler 12 and the recovery of ozone by the activated stone tank 14 are started again.

Therefore, the time from when the lower float switch 25 is turned off to when the upper float switch 24 is turned on should be the timer A45.
The measured ozone time is the collected ozone exhaust time. However, since a sterilization process using the collected ozone is included, the set ozone time of the timer B43 is subtracted to be the collected ozone exhaust time.

As described above, the pressure in the activated stone tank 14 is changed by the opening and closing of the solenoid valve A20 and the solenoid valve C27 performed at the time of sucking and discharging the collected ozone, and accordingly, the water level fluctuates between the upper and lower limits. It is detected by the upper and lower float switches 24 and 25.

Therefore, the O of the upper and lower float switches 24 and 25
By measuring the interval between N and OFF with the timer A45, the time for sucking and discharging the collected ozone can be measured.

The control device is provided with a line abnormality detection ROM 48 that stores the relationship between the line abnormality and the collected ozone intake / exhaust time. The data stored in the ROM 48 and the timer A45 described above are provided.
The data of the collected ozone intake / exhaust time measured in step (1) are compared by a pipe abnormality determining means including a CPU 46 as a calculating means and a RAM 47 as a temporary storage means to determine the presence or absence of an abnormality.

When the abnormality of the pipeline is determined as described above, for example, the following measures are taken.

First, when it is determined that the evacuation time is slightly longer and the filter 5 is clogged, a warning is first issued by flashing the filter replacement lamp 39 on the operation panel, and then the evacuation time is further prolonged and the When replacement is necessary, the filter replacement lamp 39 is turned on, and a hot water display section 40 displays an abnormal location instead of the hot water temperature, for example, E1, to indicate an abnormal location, and a control circuit 44.
To stop the operation of the circulation pump 7 and the heating device 9 and the operation of the device.

 At this time, the operation stop lamp 49 is also turned off.

In addition, the intake time becomes longer, and the activated stones 15 in the activated stone tank 14
Abnormalities in the drainage side including clogging of the packed bed and air pump
If it is determined that an abnormality has occurred in the device 17, the operation of the circulation pump 7 and the heating device 9 is stopped by the control of the control circuit 44 to stop the operation of the device, and the hot water temperature display section 40 displays, for example, E2. An abnormal display indicating the abnormal location is taken.

(Effects) The effects of the present invention will be described with reference to FIGS. 4 and 5, which show the relationship between the amount of hot water in the pipeline and the flow rate of hot water and the time for sucking and discharging the collected ozone to and from the activated stone tank as the gas-liquid separation tank. I do.

FIG. 4 shows the relationship between the hot water suction side with respect to the activated stone tank, that is, the clogging of the filter, the flow rate of the hot water, and the suction and exhaust time.

As is apparent from this figure, when the clogging of the hot water side, which is a clogging of the filter, occurs, both the flow rate and the intake time gradually decrease, and the exhaust time rapidly increases. .

This is because when the hot water suction side is clogged and the flow rate is reduced, the pressure in the pipeline decreases, and the ozone is easily sucked from the ozone generator of the ozone inhaler. Since the method of exhausting to the drain pipe by using the pressure difference with the pipeline is adopted, it indicates that the exhausting capacity is rapidly reduced and the exhausting time is increased.

Therefore, in contrast to the conventional detection of a pipe abnormality using a change in the flow rate, if a pipe abnormality on the suction side is detected using a change in the exhaust time, the pipe abnormality can be detected with extremely high accuracy. It can be seen that it can be detected.

Therefore, for example, if there is no clogging in the pipeline, 1
When a flow rate of 5.2 l / min is obtained and the flow rate drops to 13 l / min or less, the cleaning performance is inferior. A warning is first issued at the flow rate of 13.2 l / min when the evacuation time is 20 seconds, and the flow rate is 12.5 l / mi when the evacuation time is 30 seconds.
It becomes possible to stop the apparatus at the time of n, and to display the abnormality on the hot water suction side.

In the conventional detection of a pipe abnormality based on a flow rate change, as shown in this example, the change is not so large, about 2 l, so it was impossible to detect this sensitively, and a warning could not be issued.

FIG. 5 shows the relationship between the clogging of the activated stone filling layer of the activated stone tank on the drain side including the clogging, the flow rate change, and the intake / exhaust time.

As is clear from the figure, when clogging occurs on the hot water discharge side, the flow rate gradually decreases as in the case of the previous hot water suction side clogging,
Conversely, the exhaust time gradually increases, and the intake time rapidly increases.

This is because, when the drainage side becomes clogged and the flow rate decreases and the pressure in the pipeline increases, it becomes extremely difficult to inhale ozone from the sterilizing ozone inhaler 12 and the intake time increases sharply. This indicates that the evacuation time gradually but gradually increases because the pressure difference between the pressure and the pressure decreases.

Therefore, it is possible to accurately detect the clogging on the drainage side based on the intake time, stop the operation of the apparatus, and display on the display unit that there is an abnormality in the drainage side pipeline.

In the example of this device, it is sufficient to determine that the device is abnormal when the intake time becomes 30 seconds, when the flow rate of hot water has dropped to 12.8 l / min, at which the device needs to be stopped.

In this case, if the ozone supply is hindered due to a failure of the air pump for the sterilizing ozone inhaler 12, the intake time increases, so that it is detected as an abnormality on the drain side.

As mentioned above, activated stone tank as gas-liquid separation tank
Based on the time of intake and exhaust of the collected ozone for 14, abnormalities are detected separately for the hot water side and the hot water side including the ozone supply system, and a warning is issued or the device is stopped, and the abnormal location is displayed. And a bathtub hot water cleaning device having an abnormality detection device with extremely high detection accuracy is provided.

[Brief description of the drawings]

FIG. 1 is a diagram showing a bathtub hot water cleaning device of the present invention, FIG. 2 is a block diagram showing this control device, FIG. 3 is a diagram showing an operation panel, and FIGS. 4 and 5 are effects of the present invention. FIG. 1 ... bathtub, 2 ... hot water, 3 ... cleaning treatment unit, 4
… Filtration device, 7… Circulation pump, 12… Sterilized ozone suction device, 14… Activated stone tank (gas-liquid separation tank), 14a
…… Recovered ozone storage unit, 17 …… Ozone generator, 18 ……
Ozone supply pipe, 20 ... solenoid valve, 22 ... solenoid valve, 23 ... water level detection pipe, 24 ... upper float switch, 25 ... lower float switch, 26 ... ozone exhaust pipe, 27 ... solenoid valve,
28 drain pipe, 29 exhaust ozone suction device, 45 timer (recovery ozone suction and discharge time measuring means), 46 CPU (pipe abnormality determination means), 48 pipe abnormality detection ROM.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C02F 1/50 531 C02F 1/50 540A 540 550H 550 550L 560Z 560 B01D 35/02 J

Claims (1)

(57) [Claims] 1. A sterilizing ozone inhaler 12 for inhaling sterilizing ozone into hot water in a circulation path using a circulation pump 7 of the bathtub hot water 2, and a sealed air collecting device for recovering unreacted ozone in the hot water. A liquid separation tank 14 and an exhaust ozone suction device 29 for sucking the collected ozone into the hot water returning to the bathtub 1 and discharging the ozone are sequentially provided from the upstream side, and one end of the sterilization ozone suction device is connected to the ozone generator 17. The other end of the ozone supply pipe 18 to be connected is connected via an electromagnetic valve 20, and the collected ozone storage section 14 of the gas-liquid separation tank 14 is connected.
The other end of the ozone exhaust pipe 26 connected to the exhaust ozone suction device 29 is connected to another end of the ozone exhaust pipe 26 via a solenoid valve 27, and the solenoid valves 20 and 27 are opened and closed to the collection ozone storage part 14a of the gas-liquid separation tank 14. In the bathtub hot water purifying device for collecting and exhausting a predetermined amount of ozone, the control device 34 as a pipeline abnormality detecting device includes:
Each time required for collecting and exhausting a predetermined amount of ozone in the collected ozone storage section of the gas-liquid separation tank 14, that is, the intake time of the collected ozone and the exhaust time are measured by a built-in timer. A pipeline abnormality detecting device for a bathtub hot water cleaning device, wherein a pipeline abnormality is determined based on time and exhaust time.