JP2013128650A - Hot water replenishing control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water replenishing control system with a liquid level detecting unit in which the influence of the sticking of contamination substances in hot water is less, the contamination of Legionella bacteria can be easily coped, the liquid level to be detected can be easily changed, and there is no problem even in the case the hot water causes the corrosion of a metal.SOLUTION: The hot water replenishing control system has a bubble type liquid level measuring unit 300 measuring the liquid level of a recovering tank 130 according to a water pressure at the distal end of an air discharging tube 310 of which a distal end is submerged in the recovering tank 130 when the hot water in the tank is filtered and regenerated and circulated by a filter unit 200 and the control of starting and stopping to replenish replenishing water to the recovering tank 130 of a bathtub 100 is carried out according to the liquid level of the recovering tank 130.

Description

  The present invention relates to a hot water supply control system applied to a bathtub device, a pool device, and the like.

  Conventionally, for large bathtub devices, hot water is sucked and collected from the bottom of the bathtub body, hair and towel scraps are removed with a hair catcher, suspended matter and sediment are removed with a filtration device, and heat is removed. A filtration system is used in which the hot water is circulated and filtered by heating to a predetermined temperature with an exchanger and then returned to the bathtub body. In addition, the overflow hot water flowing out from the bathtub body is once recovered in a recovery tank installed in the machine room or in a recovery tank communicating with the bathtub body, and a circulating filtration heating process is performed on the overflow hot water. (For example, refer to Patent Document 1).

  And in these bathtub apparatuses, when the quantity of the hot water in a bathtub main body or a collection tank reduces, this is detected and the hot water supply control system which replenishes hot water is added. In this hot water supply control system, the liquid level level of the hot water in the bathtub body or the recovery tank is detected by a liquid level measuring device.

  As this liquid level measuring device, for example, three electrodes having different lengths are projected downward, and the long first electrode whose tip is the lowest is a ground electrode that is always immersed in hot water, and a shorter first electrode. There is an electrode type in which the two electrodes are lower limit level detection electrodes and the shortest third electrode is an upper limit level detection electrode.

  This electrode-type liquid level measuring device detects that the liquid level of the hot water has fallen below the lower limit level, for example, because the second electrode and the third electrode are no longer in contact with the hot water. Supply can be started. Moreover, when the 2nd electrode contacts hot water, it can detect that the liquid level of the said hot water rose exceeding a lower limit level. Moreover, when the 2nd electrode and the 3rd electrode contact hot water, it can detect that the liquid level of the said hot water rose exceeding an upper limit level, and can stop supply of hot water by this. Some liquid level measuring devices have four or more electrodes to perform hysteresis control.

  Also, as another type of liquid level measuring device, a float with a built-in magnet floats on the liquid surface, and the float moves up and down along a cylinder in which a plurality of reed switches are arranged in the vertical direction. There is a float type that measures the liquid level by turning on. In addition, there is an ultrasonic type in which an ultrasonic wave transmitted from above the liquid surface is reflected by the liquid surface and received, and a liquid surface level is measured by a time interval between transmission and reception. Also, there is a throwing type that detects the liquid level by throwing a pressure sensor attached to the tip of the waterproof tube into the water and taking out the water pressure data detected by the pressure sensor and processing it with electrical wiring inserted in the waterproof tube. is there.

JP 2003-311107 A

  However, when using the electrode-type liquid level measuring device described above for detecting the liquid level in a bathtub or a collection tank, hot water is in direct contact with the electrode. Lost, and accurate level detection may not be possible. Moreover, since the length of the electrode is fixed, when changing the liquid level to be detected, the liquid level measuring device itself must be changed. In addition, when the hot water is a specific hot spring water that causes metal corrosion, the electrode type liquid level measuring device cannot be used. Further, since the electrodes of the liquid level measuring device are almost always in contact with hot water, regular cleaning is required. However, since a plurality of electrodes must be cleaned, work is troublesome. In particular, when electrodes are installed in the pooled hot water where there is no flow, the risk of breeding Legionella is great, so the periodic cleaning cycle must be shortened.

  On the other hand, when the float type liquid level measuring device is used, the float moves up and down as the liquid level fluctuates. Therefore, there is a problem that suspended matter easily enters between the float and the cylinder and breaks down. In addition, when using an ultrasonic liquid level measuring device, the accuracy may be lost due to bubbling of the liquid level, or the bather may enter the detection region and malfunction. Furthermore, when using a throw-type liquid level measuring device, electrical wiring is drawn into the water, so countermeasures against electric leakage are essential, and the size is increased to prevent corrosion and waterproof, and workability is also poor. There is a problem.

  The present invention has been made in view of the above points, and its purpose is to solve the above-mentioned problems, the influence of adhesion of contaminants in hot water is small, and can easily cope with Legionella contamination, It is an object of the present invention to provide a hot water supply control system provided with a liquid level detecting device which is easy to change the liquid level to be detected and does not cause a problem even when the hot water causes metal corrosion.

To achieve the above object, the invention according to claim 1 measures the liquid level of a tank storing hot water and supplies hot water to control the start and stop of hot water supply to the tank according to the measurement result. The control system further includes a liquid level measuring device that measures a liquid level of the hot water in the tank by a pressure in an air discharge pipe that discharges air into the hot water in the tank.
According to a second aspect of the present invention, in the hot water supply control system according to the first aspect, the liquid level measuring device includes the air discharge pipe having a tip disposed in the hot water in the tank, and the air. An air supply source that supplies air to the discharge pipe, and a pressure sensor that detects a pressure in the air discharge pipe that receives water pressure when the air supplied to the air discharge pipe is discharged into the hot water from the tip of the air discharge pipe The level of the hot water in the tank is measured based on the pressure detected by the pressure sensor.
The invention according to claim 3 is the hot water supply control system according to claim 1 or 2, wherein the air discharge pipe is arranged in a lateral state so that a tip of the air discharge pipe faces the inner wall surface from the wall of the tank. It is characterized by that.
According to a fourth aspect of the present invention, in the hot water supply control system according to the first or second aspect, the air discharge pipe has an air discharge port formed in a side surface at a tip thereof and fixed in contact with a corner of the inner wall of the tank. The guide to be arranged is mounted.
According to a fifth aspect of the present invention, in the hot water supply control system according to the first or second aspect, when the air is discharged from the air discharge pipe, the air in the air discharge pipe contacts the hot water in the horizontal direction. The area is set larger than the inner cross-sectional area of the other part of the air discharge pipe.
According to a sixth aspect of the present invention, in the hot water supply control system according to any one of the first to fifth aspects, as the air supplied to the air discharge pipe, air in the vicinity of the tank or outside air is used. It is characterized by.
The invention according to claim 7 is the hot water supply control system according to any one of claims 1 to 6, wherein the tank is a bathtub body to which a circulation filtration system is applied, a recovery tank for the bathtub body, or a pool body. It is a collection tank, or a treated water storage tank or hot spring tank of a rainwater treatment system.

  According to the present invention, since the level of hot water in the tank is detected by the bubble-type liquid level measuring device, even if contaminants in the hot water adhere to the air discharge pipe, the liquid level There is no effect on the performance of the measuring device. Further, since the liquid level is detected by the air pressure in the air discharge pipe, the change of the liquid level as the control target value can be easily handled by changing the threshold value or the like in the control unit. In addition, the material of the air discharge pipe is not limited to a specific material as long as it is a material capable of ejecting air into the hot water, so that the hot water is a specific hot spring water that causes metal corrosion. If a material resistant to hot spring water is selected, the level of the hot water can be detected. In addition, when the air discharge pipe causes contamination of Legionella, only one air discharge pipe needs to be cleaned, so that the cleaning work is not time-consuming. In particular, when the tip of the air discharge pipe faces the inner wall from the inside of the tank, or when a guide is attached to the tip of the air discharge pipe and a discharge port is provided on the side surface, Since it is only an air outlet, it is not affected by pollutants and Legionella bacteria. Also, by setting the horizontal area of the tip portion where the air and hot water in the air discharge pipe come into contact with each other when the air is discharged from the air discharge pipe, it is set larger than the inner cross-sectional area of the other part of the air discharge pipe. The detection sensitivity can be increased, and even if air is contracted due to cooling in the middle of the air discharge pipe, the influence can be suppressed small. Moreover, the measurement error by the further shrinkage | contraction of the air volume in an air discharge pipe can be prevented by using the air near a tank, or external air as air supplied to an air discharge pipe.

It is a figure which shows the structure of the bathtub apparatus of the 1st Example of this invention. It is a figure which shows the structure of the bathtub apparatus of the 2nd Example of this invention. It is a figure which shows the structure of the pool apparatus of the 3rd Example of this invention. It is explanatory drawing of the adapter of the 4th Example of this invention. It is explanatory drawing of the guide of the 5th Example of this invention. It is explanatory drawing of the cover apparatus of the 6th Example of this invention. It is explanatory drawing of the liquid level detection apparatus of the bubble type | mold and air regular supply type of the 7th Example of this invention. It is explanatory drawing of the liquid level level detection apparatus of the bubble type and continuous air supply type of the 8th Example of this invention.

<First embodiment>
The structure of the bathtub apparatus provided with the hot-water supply control system of the 1st Example of this invention in FIG. 1 is shown. Reference numeral 100 denotes a bathtub device, which is partitioned by a partition wall 110 into a bathtub body 120 and a collection tank 130. The bathtub main body 120 is provided with a hot water jet 121 and a suction port 122 at positions apart from each other near the bottom surface, and a supply pipe 123 for supplying hot water is provided above. The control hot water is controlled by the supply pipe 123 by a control valve 124. A suction port 131 is provided in the recovery tank 130, and a tip portion of an air discharge pipe 310 of a bubble type liquid level measuring device 300 described later is immersed in the hot water of the recovery tank 130. The partition wall 110 is set to have a height H2 lower than the height H1 of the bathtub body 120 so that overflowing hot water from the bathtub body 120 can flow into the recovery tank 130. A flow rate adjusting fitting 111 is provided for controlling the amount of hot water in 120 flowing out to the recovery tank 130.

  In this bathtub apparatus 100, when the number of people bathing in the bathtub main body 120 increases, hot water overflows from the bathtub main body 120 toward the collection tank 130, and overflow from the bathtub main body 120 to a washing place or the like is prevented. The recovery tank 130 accumulates not only the overflow hot water but also the hot water of the bathtub body 120 even if the flow rate adjusting fitting 111 is interposed. By adjusting the flow rate passing through the flow adjusting fitting 111, the upper end of the partition wall 110 is The flow rate that overflows can be adjusted.

  Reference numeral 200 denotes a hot water filter, a hair catcher 210 that removes hair and towel scraps in hot water, a pump 220 that sucks hot water from the suction port 131 of the recovery tank 130, suspended matter and sediment in hot water, etc. The heat exchanger 240 which heats the filtered hot water to predetermined temperature, the valve 250 opened at the time of backwashing, the piping 260 which connects each part, and the backwashing discharge pipe 270 are provided.

  In this filtration device 200, by driving the pump 220, the hot water sucked from the recovery tank 130 passes through the hair catcher 210 → pump 220 → filter device 230 → heat exchanger 240, and is filtered and purified to an appropriate temperature for regeneration. And circulates from the spout 121 to the bathtub body 120. At the time of backwashing of the filtration device 230, the valve of the filtration device 230 is switched to a backwash passage (not shown), the valve 250 is opened, and hot water drawn from the suction port 122 of the bathtub body 120 is filtered. The inside of the device 230 is circulated in the opposite direction to that during normal filtration, and is discharged from the backwash discharge pipe 270, whereby the filter material in the filter device 230 is washed and regenerated.

  Reference numeral 300 denotes a bubble-type liquid level measuring device for measuring the liquid level of the recovery tank 130. The tip is an air made of Teflon hose (Teflon is a registered trademark) or other material immersed in the hot water of the recovery tank 130. A discharge pipe 310, a pump 320 for sending air to the air discharge pipe 310, a pressure sensor 330 for detecting the pressure in the air discharge pipe 310, and the air in the air discharge pipe 310 when the pump 320 is stopped. And a control circuit 350 that controls the driving of the pump 320 and the control valve 124 of the supplemental hot water. The control circuit 360 calculates the liquid level of the hot water in the recovery tank 130 based on the pressure detected by the pressure sensor 330, and controls the pump 320 and the control valve 124 according to the calculation result.

This bubble-type liquid level measuring device 300 supplies air from a pump 320 to an air discharge pipe 310, discharges bubbles from the tip (lower end) of the air discharge pipe 310, and the air discharge pipe 310 contains only air. When the pressure is filled, the pressure of the surface of the air discharge pipe 310 that is in contact with the hot water is transmitted to the pressure sensor 330 and detected there. This detected pressure is a water pressure corresponding to a depth H3 from the hot water surface to the tip of the air discharge pipe 310. When the detected pressure is P1,
H3 = k · P1
The depth H3 can be obtained by the following calculation. k is a coefficient determined by the specific gravity of hot water and other factors. Thus, if the distance L from the lower end of the air discharge pipe 310 to the bottom surface of the recovery tank 130 is obtained in advance, the liquid level of the hot water in the recovery tank 130 can be detected by “H3 + L”. In addition, since it is only necessary to detect the absolute level of the liquid level, it is not always necessary to include the distance L.

  After air is sent from the pump 320 and the pressure at the tip of the air discharge pipe 310 is detected, it is not necessary to send air from the pump 320, so the drive of the pump 320 may be stopped, but the detected pressure is stable. If it takes a long time to wait, the pump 320 is continuously driven to send air to the air discharge pipe 310 and then stopped, and the standby time during which the pressure fluctuation of the air discharge pipe 310 seems to be within a predetermined fluctuation range. At the point of time, the liquid level corresponding to the pressure is detected and stored as a reference value. Thereafter, the pressure fluctuation of the air discharge pipe 310 exceeds a predetermined fluctuation range from the stored reference value. When rising or lowering, the pump 320 is driven again to send air to the air discharge pipe 310, and thereafter, the reference value is updated and stored by the detected pressure at the time when the standby time has elapsed. It allows the pump 320 can be intermittently driven to the automatic tracking type according to the pressure change of the air discharge pipe 310. That is, every time the pressure of the air discharge pipe 310 changes (every time the liquid level of the recovery tank 130 changes), the liquid level can be stored.

  Then, in the control circuit 350, for the liquid level of the recovery tank 130, S1 is set as the lowest threshold level for starting supply of hot water from the supply pipe 123 to the bathtub body 120, and S2 is set as the highest threshold level for stopping supply of hot water. If so, the opening and closing of the control valve 124 of the hot water supply pipe 123 is controlled so that the level of the hot water in the recovery tank 130 falls within the range of the threshold levels S1 and S2. As described above, even when the liquid level is detected after the elapse of a predetermined waiting time, if there is a possibility that gradual chattering may occur when the threshold levels S1 and S2 are detected, the minimum threshold is set. When the level S1 is detected, the threshold level S1 is corrected to be slightly higher, and when the highest threshold level S2 is detected, the hysteresis is set so that the threshold level S2 is corrected to be slightly lower. Good.

  Thus, in the present embodiment, the level of hot water in the recovery tank 130 can be detected over almost the entire range by the bubble-type liquid level measuring device 300, and the detection accuracy can be increased. Therefore, the liquid level at which hot water supply is started (the above-mentioned minimum threshold level S1) and the liquid level at which hot water supply is stopped (the above-mentioned maximum threshold level S2) can be arbitrarily set, and the change is also possible. Easy. Further, even if some pollutant in the hot water adheres to the air discharge pipe 310, there is no effect on the pressure detection, and cleaning is easy. The material of the air discharge pipe 310 is not limited to a specific material as long as it is a material capable of ejecting air into the hot water, so that the hot water is a specific hot spring water that causes metal corrosion. If a material having resistance to the hot spring water or the like is selected, the level of the hot water can be detected. In addition, when the air discharge pipe 310 causes Legionella contamination, only one air discharge pipe 310 needs to be cleaned, so that work is not time-consuming. These are significant advantages compared to the case where an electrode type liquid level measuring device is used. In addition, it does not break down due to suspended substances as in the case of using a float type liquid level measuring device, and the liquid level is bubbled as in the case of using an ultrasonic type liquid level measuring device. There is no risk that accuracy will be lost, bathers may enter the detection area and malfunction, and there is no problem of leakage countermeasures or increase in size, as in the case of using a throw-type liquid level measuring device. Construction is also easy.

<Second embodiment>
The structure of the bathtub apparatus provided with the hot-water supply control system of the 2nd Example of this invention in FIG. 2 is shown. In this embodiment, the inside of the bathtub apparatus 100 is not partitioned, and the tip of the air discharge pipe 310 of the bubble-type liquid level measuring apparatus 300 is formed on the inner wall surface 125 on the opposite side to the installation side of the supply pipe 123 of the bathtub body 120. From the side of the wall. Even when the air discharge pipe 310 is installed in this way, the depth H3 from the tip of the air discharge pipe 310 to the surface of the hot water is detected by sending air and detecting the pressure at the tip of the air discharge pipe 310. Therefore, it is possible to control the start and stop of supply of hot water by the supply pipe 123 according to the detection result.

  In this way, when the front end of the air discharge pipe 310 faces the inner wall surface 125 of the bathtub body 120 from the side, the air discharge pipe 310 itself is not immersed in the hot water and the air discharge pipe is always used. Since hot water does not enter 310, the air discharge pipe 310 is prevented from being polluted by hot water or contaminated with Legionella bacteria. Others are the same as the first embodiment.

<Third embodiment>
FIG. 3 shows a configuration of a pool apparatus including a hot water supply control system according to a third embodiment of the present invention. In the pool apparatus 400, a collection tank (or balancing tank) 420 is installed at a lower location away from the pool main body 410. Hot water drawn from the suction port 411 on the bottom surface of the pool main body 410 is taken into the hair catcher 210 of the filtration device 200 through the pipe 260 and filtered and heated in the same manner as in the first embodiment. It is circulated from the outlet 412 to the pool body 410. Moreover, the overflow hot water of the pool main body 410 flows from the overflow receiving port 413 installed around the pool main body 410 into the spout 421 of the recovery tank 420 through the pipe 430 by natural fall. Hot water in the collection tank 420 is sucked in by the pipe 440, taken into the hair catcher 210 of the filtration device 200, filtered and heated, and then circulated to the jet outlet 420 of the hot water pool 400 by the pipe 260.

  Here, the liquid level of hot water in the recovery tank 420 is measured from the water pressure (depth H4) of the air discharge pipe 310 in the same manner as in the first embodiment described above with the bubble-type liquid level measuring device 300. The control circuit 350 controls the opening and closing of the control valve 451 of the supply pipe 450, thereby controlling the liquid level of the hot water in the recovery tank 40 within a predetermined level range. Others are the same as in the first embodiment.

<Fourth embodiment>
FIG. 4 shows an adapter 360 for the bubble-type liquid level measuring device 300 of the fourth embodiment. The adapter 360 is attached to the tip of the air discharge pipe 310 by fitting or the like, and the inner cross-sectional area thereof is set larger than the inner cross-sectional area of the air discharge pipe 310. This adapter 360 can be applied to the first and third embodiments in which the tip portion of the air discharge pipe 310 is vertically immersed in hot water. In this embodiment, since the pressure change in the air discharge pipe 310 is amplified with respect to the water pressure change in the adapter 360, the pressure detection sensitivity can be increased.

  The pump 320, the pressure sensor 330, the check valve 340 and the like of the liquid level measuring device 300 are usually installed in a machine room, but this machine room has a relatively high temperature. For this reason, when the distance from the front-end | tip part of the air discharge pipe 310 to a machine room becomes long, the middle of the air discharge pipe 310 is easy to be cooled rapidly. At this time, since the air volume of the rapid cooling portion is reduced, the pressure detected by the pressure sensor 330 is decreased, the number of operations of the pump 320 is extremely increased, or hot water is sucked up from the tip of the air discharge pipe 310. Problems occur.

  However, if the adapter 360 of this embodiment is attached to the tip of the air discharge pipe 310 to increase the detection sensitivity, the influence of the decrease in the air volume in the middle of the air discharge pipe 310 is reduced, and the backflow of hot water is also reduced. Can be suppressed.

  Further, if a protrusion 361 that protrudes downward at an angular interval of 90 degrees, for example, is provided around the lower end surface of the adapter 360 and the adapter 360 itself is increased in weight, the adapter 360 serves as a weight. The lower end of the protrusion 361 of the adapter 360 can be reliably installed on the bottom surface of the collection tanks 130 and 420, and the pressure detection point (depth) can be easily set.

<Fifth embodiment>
FIGS. 5A, 5B and 5C show a guide 370 for the bubble-type liquid level measuring apparatus 300 of the fifth embodiment. In the second embodiment in which the air discharge pipe 310 is directly immersed in the bathtub body 120 from above, an error occurs in level detection if the top and bottom positions of the tips are shifted.

  Therefore, in this embodiment, a guide 370 having a right triangle is attached to the distal end portion of the air discharge pipe 310, and the guide 370 is fixedly disposed at the corner 126 of the inner wall of the bathtub body 120. The guide 370 has an attachment hole 371 in which the tip of the air discharge pipe 310 is fitted at the upper end, an air discharge port 372 formed in the lower side surface, and a communication hole 373 between the attachment hole 371 and the air discharge port 372. It is communicated by.

  In this way, by attaching the guide 370 to the tip of the air discharge pipe 310 and fixing it to the corner 126 of the inner wall of the bathtub body 120, mischief of the tip of the air discharge pipe 310 can be avoided. Note that the air discharge pipe 310 drawn out from the guide 370 is exposed in the bathtub, but if this seems to be a problem in appearance, the exposed air discharge pipe 310 is appropriately attached to the corner 121 of the inner wall of the bathtub main body 120 by a material. Paste or embed. Further, if at least the inner cross-sectional area of the communication hole 373 of the guide 370 is made larger than the inner cross-sectional area of the air discharge pipe 310, the detection sensitivity can be increased similarly to the adapter 360 described in FIG. .

<Sixth embodiment>
FIG. 6 shows a cover device 380 of the sixth embodiment. In the second embodiment described with reference to FIG. 2, the tip of the air discharge pipe 310 faces the inner wall surface of the bathtub body 120, so that if the tip is blocked by something, the pressure in the air discharge pipe 310 is abnormally high. Therefore, although abnormality detection is possible, level detection is no longer possible.

  Therefore, in this embodiment, the tip of the air discharge pipe 310 is retracted into the wall rather than the inner wall surface 125 of the bathtub main body 120, and the cover device 380 is attached to the retracted portion. The cover device 380 has a bowl shape in which the small-diameter portion 381 at the far end is coupled to the tip of the air discharge pipe 310 and the large-diameter portion 382 at the tip faces the inner wall surface 123 of the bathtub main body 120. 382 is covered with a net 383. In this way, by attaching the cover device 380 to the tip of the air discharge pipe 310, there is no possibility that the air supplied to the bathtub body 120 is blocked. Such a cover device 380 can also be applied to the air discharge port 372 of the guide 370 of the fifth embodiment of FIG. In addition, here, a measure is taken to prevent the accumulation of hot water in the pipe by inclining the laterally arranged portion in the wall of the air discharge pipe 310 so that the tip is downward. Such a measure can be similarly applied to the air discharge pipe 310 in FIG.

<Seventh embodiment>
In the first to third embodiments described above, as the bubble-type liquid level measuring device 300, the pump 320 is driven and air is intermittently supplied from the air discharge pipe 310 whenever the detected pressure changes. Although the automatic follow-up type is adopted, a regular air supply type that regularly supplies air may be adopted. As shown in FIG. 7, the timer 351 repeatedly drives the pump 320 for a predetermined time at regular time intervals to supply air. Even in this regular air supply type, the liquid level can be accurately measured by synchronizing the air supply timing and the level measurement timing, and the supply of makeup water is controlled by controlling the control valves 124 and 451 appropriately. be able to.

<Eighth embodiment>
In addition, as the bubble-type liquid level measuring device 300, a continuous air supply type that continuously supplies air may be adopted, separately from the embodiment of FIG. As shown in FIG. 8, the compressed air generated by the compressor 391 of the continuous air supply device 390 is always accumulated in the air tank 392, and the air taken out from the air tank 392 is passed through the filter 393 and the restrictor 394. The discharge pipe 310 is continuously supplied. The filter 393 is used for preventing clogging of the throttle 394 and removing oil so that an oil film is not generated on the water surface. The restrictor 394 is for restricting the amount of air to ensure measurement accuracy while suppressing foaming of the bathtub. In this embodiment, if a solenoid valve is inserted between the throttle 394 and the pressure sensor 330 and the opening and closing of the solenoid valve is controlled by a timer, the regular air supply system described in FIG. 7 can be realized.

<Other examples>
As described above, when the distance from the air discharge pipe 310 to the pressure sensor 330 is long and the air discharge pipe 310 is likely to be quickly cooled, the first to third and seventh embodiments are used. If low temperature air such as the vicinity of the bathtub device or the collection tank or outside air is taken into the pump 320, the air volume will not further shrink, so that measurement errors due to temperature can be easily prevented. In addition, the measurement error due to the temperature drop can be corrected by installing a temperature sensor at a location where the air discharge pipe 310 is easily cooled and correcting the measurement result according to the detected temperature.

  Furthermore, although the Example demonstrated above was about the hot water supply control system applied to the circulation filtration system, this invention is applicable also to another hot water supply control system. For example, the amount of hot spring water stored in the hot spring tank is measured using a liquid level measuring device, and start / stop of hot water supply to the hot spring tank is controlled according to the measurement result. In addition, in the rainwater treatment system where rainwater stored in the rainwater tank is filtered and stored in the treated water storage tank, and the treated water in the storage tank is used for toilet water, etc., storage of the treated storage tank The amount is measured using a liquid level measuring device, and control of starting / stopping replenishment from the rainwater tank to the filtering device and starting / stopping of the filtering device is performed according to the measurement result. As is clear from the above, “hot water” described above includes hot water, water, hot spring water, rainwater, and the like.

DESCRIPTION OF SYMBOLS 100: Bath apparatus, 110: Partition, 111: Flow control metal fitting, 120: Bath main body, 121: Spout, 122: Suction port, 123: Supply pipe, 124: Control valve, 125: Inner wall surface, 126: Inner wall corner 200: Filtration device, 210: Hair catcher, 220: Pump, 230: Filtration device, 240: Heat exchanger, 250: Control valve, 260: Piping 300: Liquid level measuring device, 310: Air discharge pipe, 311: Adapter, 312: Protrusion, 320: Pump, 330: Pressure sensor, 340: Check valve, 350: Control circuit, 360: Adapter, 361: Protrusion, 370: Guide, 371: Mounting hole, 372: Discharge port, 373: Communication hole 380: Cover device, 383: Net, 390: Air continuous supply device, 391: Compressor, 392: Air tank, 393: Filter, 394 Restriction 400: Pool device, 410: Pool body, 411: Suction port, 412: Jetting port, 413: Overflow receiving port, 420: Recovery tank, 421: Jetting port, 430, 440: Piping, 450: Supply pipe, 541: Control valve

Claims (7)

In the hot water supply control system for measuring the liquid level of the tank in which hot water is stored and controlling the start and stop of hot water supply to the tank according to the measurement result,
A hot water supply control system comprising a liquid level measuring device for measuring a liquid level of hot water in the tank by a pressure in an air discharge pipe for discharging air into the hot water in the tank. The hot water supply control system according to claim 1,
The liquid level measuring device includes the air discharge pipe having a tip disposed in hot water in the tank, an air supply source for supplying air to the air discharge pipe, and air supplied to the air discharge pipe A pressure sensor that detects the pressure in the air discharge pipe that receives water pressure when discharged from the tip of the air discharge pipe into the hot water, and based on the pressure detected by the pressure sensor, A hot water supply control system characterized by measuring the level of the liquid level. In the hot water supply control system according to claim 1 or 2,
The hot water supply control system is characterized in that the air discharge pipe is arranged in a lateral state so that a tip thereof faces the inner wall surface from the inside of the tank. In the hot water supply control system according to claim 1 or 2,
The hot water supply control system is characterized in that the air discharge pipe is provided with a guide which is fixedly arranged in contact with the corners of the inner wall of the tank at the tip of the air discharge pipe. In the hot water supply control system according to claim 1 or 2,
The horizontal area of the tip portion where the air in the air discharge pipe contacts the hot water when discharging air from the air discharge pipe is set larger than the inner cross-sectional area of the other part of the air discharge pipe. Hot water supply control system characterized by that. In the hot water supply control system according to any one of claims 1 to 5,
A hot water supply control system using air in the vicinity of the tank or outside air as the air supplied to the air discharge pipe. In the hot water supply control system according to any one of claims 1 to 6,
Hot water supply control characterized in that the tank is a bathtub body to which a circulation filtration system is applied, a recovery tank of the bathtub body or a recovery tank of the pool body, a treated water storage tank or a hot spring tank of a rainwater treatment system system.

Images