JP2001190441A - Chemical mixing and discharging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enlarge a chemical container and further to always discharge an aqueous chemical solution of stable saturation concentration for a long time during water discharging. SOLUTION: This device is provided with a discharging implement, water feeding path connected to this charging implement, a first opening/closing valve part for opening/closing water to flow in this water feeding path, the chemical container, in which a water-soluble chemical is stored, a discharging path for connecting the water feeding path to the chemical container, a discharging means for discharging the aqueous chemical solution in the chemical container through the discharging path into the water feeding path, a water level detecting means provided in the chemical container, an inflow path for connecting the water feeding path to the chemical container, and a second opening/closing valve part provided in this inflow path to be opened on the basis of the water level detecting means when a water level is within a prescribed water level range, and a take-out port part of the discharging path from the chemical container is positioned a little lower than the lower limit position of the prescribed water level range.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medicine-mixing and discharging apparatus used for water-supply equipment such as a bathroom, a washroom, and a hair washer provided with a discharging device such as a spout or a shower.

[0002]

2. Description of the Related Art Conventionally, this type of apparatus has been disclosed in Japanese Patent Laid-Open No.
No. 96902 is known.

In this apparatus, ascorbic acid powder is stored in a medicine container, and an inflow pipe and an outflow pipe opened in a shower are provided. The container is directly connected to the shower, and water is introduced into the container from the inflow pipe to ascorbine. The saturated solution in which the acid is dissolved is discharged from the outlet pipe into the shower to remove chlorine in the shower spout.

[0004]

However, in the above-described conventional apparatus, the medicine container is provided with an inflow pipe and an outflow pipe which are opened in the shower, and this vessel is directly connected to the shower. If the drug container is too large, the weight will increase and it will not be possible to hold the shower in hand.In addition, water will be introduced into the container from the inflow tube, and a saturated solution containing ascorbic acid will be introduced into the shower from the outflow tube. However, if all the ascorbic acid is dissolved for a while, the concentration of the ascorbic acid solution released into the shower gradually decreases, and the chlorine removing ability disappears.

An object of the present invention is to solve such a problem, to make a medicine container large, and to be able to always discharge a stable aqueous solution of a saturated concentration into a spout over a long period of time.

[0006]

In order to achieve the above object, in a medicine mixing and discharging apparatus according to the present invention, a discharging device includes:
A water supply passage connected to the discharge device, a first opening / closing valve for opening and closing water flowing through the water supply passage, a medicine container containing a water-soluble medicine, and a discharge passage connecting the water supply passage to the medicine container. Releasing means for discharging the aqueous solution of the medicine in the medicine container into the water supply path via the discharge path; water level detecting means provided in the medicine container; and an inflow path connecting the water supply path and the medicine container. A second opening / closing valve portion provided in the inflow channel and opening a water level within a predetermined water level range based on the water level detection means, and an outlet from the medicine container of the discharge channel is provided in the predetermined water level range. It is located slightly below the lower limit position.

[0007] In this way, the medicine container can be formed separately from the ejection device, so that the size of the medicine container is not limited. In addition, a large amount of medicine is stored in the medicine container and the aqueous solution of the medicine in the medicine container is removed. It is saturated, the water level is detected by the water level detection means, and the second on-off valve is opened within the predetermined water level range to automatically supply water into the medicine container, and is slightly lower than the lower limit position of the predetermined water level range. A saturated aqueous solution of the medicine can be taken out from the outlet provided at the position and discharged into the water supply channel.

Further, a stable saturated aqueous solution can be discharged into the spouting water for a long period of time without adjusting the concentration of the aqueous solution of the drug, without human intervention.

When the water level detecting means is constituted by a level sensor and the second opening / closing valve section is constituted by an electromagnetic valve, and the electromagnetic valve section is opened within a predetermined water level range based on the water level signal of the level sensor, the electromagnetic valve is opened. The installation position can be set at any position in the inflow channel.

The water level detecting means and the second opening / closing valve section may be constituted by a ball tap provided with a float and a valve which opens and closes in cooperation with the float. In this case, a mechanical mechanism can be realized at low cost. .

If the drug is ascorbic acid and this aqueous solution of ascorbic acid is discharged into the water supply channel, residual chlorine in tap water passing through the discharge device can be removed.

By positioning the opening of the inflow path into the medicine container below the container, the replenished water does not flow directly from the outlet, and a saturated aqueous solution having a stable concentration can be discharged.

It is preferable to provide a specific gravity detecting unit for detecting the specific gravity of the aqueous solution of the drug in the drug container, and to notify the replenishment of the drug when the specific gravity of the aqueous solution of the drug becomes lighter than a predetermined specific gravity. Notify the person that the concentration of the aqueous drug solution released from the outlet has fallen below a predetermined concentration,
It can encourage drug replenishment.

[0014] The discharging means is constituted by a pump device,
It is preferable to provide a sensor unit for detecting the open / close state of the first opening / closing valve unit, and to operate the pump device when the first opening / closing valve unit is open. A stable amount of drug solution can be discharged into the water only when the pump is present, and the pump device can be installed at any place inside or outside the drug container.

[0015] The discharging means may be constituted by a venturi portion provided at the junction of the water supply channel and the discharging channel. In this case, electric wiring is not required and the cost can be reduced.

If a constant flow valve is provided in the middle of the water supply passage, a predetermined amount of a drug-saturated aqueous solution is always mixed into a stable amount of spouting water, and the spouting water contains a stably diluted amount of drug from the discharge device. Can be released.

[0017]

FIG. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a schematic diagram of the same, FIG. 3 is a schematic diagram of a pump device, and FIG. FIG. 5 is a schematic diagram of a sensor unit, FIG. 5 is a graph showing a change in concentration of a drug aqueous solution in a drug container, FIG. 6 is a schematic diagram of a second embodiment of the present invention, and FIG. 7 is a schematic diagram of a venturi unit.

First, a first embodiment will be described. Reference numeral 1 denotes a hair washer, on the upper surface of which a first opening / closing valve portion 3 and a discharge tool 4 comprising a hair washing shower are provided. A flexible hose portion 5 is interposed between the secondary side of the nozzle 3 and the discharge device 4.

A thermostatic water / water mixing faucet 7 is provided on the upstream side of the flexible hose section 5 via a water supply path 6, and the first on-off valve section 3 is provided in the middle of the water supply line 6. .

The medicine container 8 is made of, for example, polyethylene and stores an aqueous solution of ascorbic acid as a medicine. The medicine container 8 is provided with a level sensor 9 and a specific gravity detecting unit 10 constituting water level detecting means inside and a second side electromagnetic valve. On-off valve part 1
1, a pump unit 14 containing a pump device 12 and a control device 13 is provided.

The level sensor 9 includes a first shaft 15, two reed switches (not shown) provided in the first shaft 15, and a water level fluctuation guided by the first shaft 15. A first float 16 that rises and falls according to
And a magnet (not shown) provided in the float 16 of the first embodiment. In cooperation with the controller 13, the level sensor 9 is turned on while the level sensor 9 rises from the first water level L to the second water level H. When the second water level is reached, an OFF state is set, and when the water level falls from the second water level H to the first water level L, the OFF state is maintained. With a slight change in water level.
This prevents switching between the N state and the OFF state.

The specific gravity detector 10 includes a second shaft 17, a reed switch (not shown) provided in the second shaft 17, a magnet guided by the second shaft 17, and a magnet therein. (Not shown) having a specific gravity of about 1.05 to 1.0 which is slightly lighter than a specific gravity of about 1.06 of a saturated aqueous solution of ascorbic acid.
And a second float 18 adjusted to 4 and moves up and down according to the specific gravity of the ascorbic acid aqueous solution.

The reed switch is installed at a height below the first water level L and in the vicinity of an ascorbic acid aqueous solution outlet 21 to be described later, and is turned on when it is lowered from this height. Is done.

The second on-off valve section 11 composed of an electromagnetic valve is connected to an inflow path 20 that connects the primary side water supply path 6 of the first on-off valve section 3 with an opening 19 provided below the medicine container 8. Intervened,
The second opening / closing valve section 11 is driven by the control device 13 to open when the level sensor 9 is in the ON state and to close when the level sensor 9 is in the OFF state.

As described above, the second opening / closing valve portion 11 is provided in the inflow passage 20 which connects the primary water supply passage 6 of the first valve closing portion 3 to the opening 19 provided below the medicine container 8. The first
Even when the on-off valve section 3 is closed, the second on-off valve section 11 is opened to allow the water in the water supply passage 6 to flow into the medicine container 8.

The pump device 12 has an outlet 21 having one end connected to the secondary water supply passage 6 of the first opening / closing valve portion 3 and the other end opened slightly below the first water level L of the medicine container 8. 3 and is constituted by a fixed-rate supply type tube pump which presses and feeds while crushing a tube 24 by rotating a roller 23 as shown in FIG.

By connecting the discharge passage 22 to the secondary water supply passage 6 of the first opening / closing valve portion 3 as described above, when the first opening / closing valve portion 3 is closed, the discharge passage 22, the pump device 12, the chemical By preventing the primary pressure of the water supply from being directly applied to the container 8, the pressure resistance of these can be reduced and the cost can be reduced.

When the first on-off valve 3 is open,
If the shower sprinkler plate of the discharge device 4 is clogged,
When the pressure rises, there is a risk of backflow from the discharge passage 22 into the medicine container 8. However, if the pump device 12 is constituted by a fixed supply type tube pump, the roller 23 crushes the tube 24, Water can be prevented from entering the medicine container 8.

Reference numeral 25 denotes a sensor unit provided in the water supply passage 6 for detecting that the first opening / closing valve unit 3 is open by detecting the flow in the water supply passage 6. As shown in FIG. 7, a magnetic change includes a swirling flow generating member 26 provided in the water supply passage 6, a magnetic ball member 27 rotating by the swirling flow, and a Hall element provided outside the water supply passage 6. When the first opening / closing valve section 3 is opened and water flows into the water supply passage 6, the ball member 27 rotates, and the detection element 28 detects a magnetic change accompanying this rotation. Detects that the first opening / closing valve section 3 is open, and this detection signal is transmitted to the control device 13.

The discharge device 4 may optionally include a pump device 1.
For example, a waterproof remote-controlled switch unit 29 is provided so as to control the driving of the second unit 2. An operation signal based on a pressing operation of the switch unit 29 is transmitted to the control device 13.

Reference numeral 30 denotes a constant flow valve provided in the secondary-side water supply passage 6 of the first on-off valve section, and when the first on-off valve section 3 is opened,
A shower with a constant flow rate is discharged from the discharge tool 4.

The constant flow valve 30 is connected to the first on-off valve 3
The secondary water supply passage 6 is provided with a constant discharge amount from the discharge device 4 provided downstream of the first on-off valve unit 3 even when the second on-off valve unit 11 is open. To do that.

The medicine container 8 is provided with a medicine charging lid 31 and a transparent window 32 with a scale.
1 is opened, a predetermined amount of a drug such as ascorbic acid is put into the drug container 8, and in the event that the second on-off valve 11 or the like fails, the lid 31 is opened and the transparent window 32 is exposed. Water can be injected up to a predetermined water level while watching the water level.

33 operates based on the specific gravity detecting section 10 and
Is a warning means that blinks when the float 18 falls below the vicinity of the outlet 21 and turns ON, thereby prompting the supply of a medicine.

When a large amount of ascorbic acid is put into the medicine container 8 in the initial state, ascorbic acid remains undissolved below the medicine container 8 as shown in FIG. Above it is filled with a saturated concentration of ascorbic acid aqueous solution.

In use, the first on-off valve portion 3
When the sensor container 25 is opened, the sensor unit 25 detects the flow of water and the control device 13 automatically drives the pump device 12 to
The saturated aqueous solution of ascorbic acid in the water is discharged into the water supply channel 6,
The chlorine content in the water supply pipe 6 is neutralized, and water from which chlorine has been removed is discharged from the discharge tool 4, and the hair is washed with this water.

When the first on-off valve 3 is closed, the sensor 2
5 automatically detects the stop of the flow of water and automatically
Stop the operation of.

When it is not necessary to remove chlorine, for example, when washing the hair washer 1, the switch device 29 is pressed to stop the operation of the pump device 12, thereby preventing unnecessary discharge of the ascorbic acid aqueous solution.

When the pump device 12 is operated, the water level in the medicine container 8 drops, but when the first float 16 of the level sensor 9 becomes lower than the first water level L, it is turned on, and the second on-off valve portion Open 11 and inflow channel 2 from water supply channel 6
The water flows into the medicine container 8 through 0.

Then, when the water level in the medicine container 8 rises and the first float 16 of the level sensor 9 reaches the second water level H, the state is turned off, the second opening / closing valve section 11 is closed and the inside of the medicine container 8 is closed. The flow of water into the water stops.

When used repeatedly, the saturated aqueous solution of ascorbic acid is discharged into the water supply channel 6, and water is replenished accordingly, and ascorbic acid remaining without being dissolved in water at the bottom of the medicine container 8 is supplied. It gradually dissolves in dissolved water,
While ascorbic acid not dissolved in water remains, the aqueous solution of ascorbic acid in the medicine container 8 is a saturated aqueous solution, and a fixed amount of the aqueous solution of ascorbic acid is supplied from the outlet 21 through the pump device 12 to the water supply passage 6. On the other hand, the constant flow valve 30 is provided in the water supply passage 6, so that ascorbic acid is always diluted to a constant concentration in water.

The dilution ratio may be set to such an extent that chlorine contained in the tap water can be removed.
Can be set by changing the set value and the rotation speed of the roller of the pump device 12.

Since the specific gravity of the second float 18 of the specific gravity detector 10 is lower than the specific gravity of the saturated aqueous solution of ascorbic acid, the second float 18 is located slightly above the water surface above the outlet 21.

When further used, all the ascorbic acid remaining without dissolving in the water at the bottom of the medicine container 8 is completely dissolved in the makeup water, and the saturated ascorbic acid aqueous solution surface gradually descends, and the It becomes a diluted ascorbic acid aqueous solution, and the second float 18 descends according to the specific gravity of the diluted aqueous solution, and finally the second float 18 reaches the vicinity of the outlet 21 and the specific gravity detection unit 10 is turned on. , The alarm device 33 is activated.

Based on this alarm, the user opens the lid 31 and puts a large amount of ascorbic acid powder into the medicine container 8.

As described above, a large amount of ascorbic acid powder is put into the medicine container 8 and a saturated aqueous solution is taken out, whereby a saturated aqueous solution of ascorbic acid having a stable concentration can be discharged into the spouting water over a long period of time.

FIG. 5 shows the time transition of the situation of the height and concentration of the water level in the medicine container 8. In this figure, the fluctuations of the first water level L and the second water level H are omitted.

Next, a second embodiment shown in FIGS. 6 and 7 will be described. In this embodiment, a water level detecting means and a second on-off valve section are provided with a float and a valve which opens and closes in cooperation with the float. It is composed of a ball tap, and the discharging means is further composed of a venturi section provided at the junction of the water supply channel and the discharging channel. The other configuration is the same as that of the first embodiment.

As shown in FIG. 6, at the tip of the inflow passage 20 branched from the primary water supply passage 6 of the first on-off valve 3, it is attached to the medicine container 8 and cooperates with the float 34. A ball tap 36 having a valve 35 that opens and closes is provided. The discharge pipe 37 of the ball tap 36 extends below the medicine container 8, and its opening 19 faces the bottom of the medicine container 8.

Further, one end is connected to an outlet portion 21 opened slightly below the first water level L of the medicine container 8, and the other end is connected to the first water level L.
Discharge passage 2 which communicates with the secondary water supply passage 6 of the on-off valve portion 3
2 is provided with a check valve 38 for preventing water from passing from the outlet 21 to the water supply passage 6 but preventing the water from moving in the opposite direction. FIG. 7 shows 39
The venturi section 40 shown in FIG.

Further, in the vicinity of the transparent window 32, a specific gravity detecting portion comprising a second float 18 adjusted to a specific gravity of about 1.05 to 1.04, which is slightly lighter than a specific gravity of a saturated aqueous solution of ascorbic acid of about 1.06. The second float 18 moves up and down in accordance with the specific gravity of the ascorbic acid aqueous solution from the transparent window portion 32.

In use, when the first opening / closing valve section 3 is opened, the venturi section 40 provided in the junction section 39 is opened.
A pressure drop is caused by the flow of water through the inside, and the pressure drop causes the saturated aqueous solution of ascorbic acid in the medicine container 8 to be sucked into the water supply channel 6 and released into the venturi section 40, and the chlorine content in the water supply pipe 6 is reduced. And water from which chlorine has been removed is discharged from the discharge tool 4.

When the first on-off valve section 3 is closed, the pressure drop in the venturi section 40 disappears and the release of the saturated ascorbic acid aqueous solution is automatically stopped.

As the water is used, the saturated ascorbic acid aqueous solution is sucked into the water supply passage 6 from the venturi section 40 to lower the water level in the medicine container 8, and the float 34 of the ball tap 36 lowers in conjunction with this water level. Water level is first
When the water level falls below the water level L, the valve 3
5 is automatically opened, and water flows from the water supply channel 6 through the inflow channel 20 to the bottom of the medicine container 8 from the discharge pipe 37.

Then, the water level in the medicine container 8 rises, the float 34 of the ball tap 36 rises, and the second water level H
Is reached, the valve 35 is automatically closed in cooperation with the float 34, and the flow of water into the medicine container 8 is stopped.

When used repeatedly, the saturated aqueous solution of ascorbic acid is discharged into the water supply passage 6, and water is automatically replenished by the ball tap 36 accordingly, and remains at the bottom of the medicine container 8 without being dissolved in water. The ascorbic acid dissolved in the replenished water gradually decreases, but the ascorbic acid aqueous solution in the medicine container 8 is a saturated aqueous solution while the ascorbic acid not dissolved in the water remains, and the venturi portion 40
, A saturated ascorbic acid aqueous solution is supplied to the water supply channel 6 and diluted.

Since the specific gravity of the second float 18 of the specific gravity detector 10 is lower than the specific gravity of the saturated aqueous ascorbic acid solution, the second float 18 is located slightly above the water surface above the outlet 21.

When further used, ascorbic acid remaining without being dissolved in water at the bottom of the medicine container 8 is completely dissolved in makeup water, and the saturated ascorbic acid aqueous solution surface gradually descends, and It becomes a diluted ascorbic acid aqueous solution, and the second float 18 descends according to the specific gravity of the diluted aqueous solution, and finally the second float 18 reaches the vicinity of the outlet 21, and it becomes necessary to supply ascorbic acid. I understand that

When the shower valve of the discharge device 4 is clogged and the pressure of the water supply passage 6 rises while the first on-off valve 3 is open, the medicine is discharged from the discharge passage 22 into the medicine container 8. Although there is a possibility of backflow, since the check valve 38 is provided, it is possible to prevent water from entering the medicine container 8 from the discharge passage 22.

The present invention can be variously modified without being limited to the above-described embodiment. For example, the first opening / closing valve portion may be remotely operated by using an electromagnetic valve. A switch for opening and closing the solenoid valve is provided in the hair washer, and its output is sent to the control device, and the pump device can be driven when the solenoid valve is open.

The switch section provided in the discharge section transmits the signal to the control device in a remote control manner, but this may be a cord type. In this case, the cord can be arranged in a flexible hose. The unit may be separately provided at a place other than the discharge unit, for example, on the upper surface of the hair washer. Of course, the switch unit may not be provided.

Further, a gear type or plunger type pump may be used as the pump device.

Further, in the above-described embodiment, an example in which the present invention is applied to a hair washer is shown. However, the present invention can be applied to, for example, a bathroom. In this case, a discharging device may be a shower or a water outlet to a bathtub. The medicine container may be stored in the counter.

Further, the present invention can be applied to a vanity stand, and a discharge tool may be a shower or a spout for a washbasin, and the medicine container may be housed in a cabinet.

When using a shower as a discharge tool,
The medicine may be shampoo or the like, and in the case of a spout to a bathtub, a bath salt or the like may be used.

[0066]

As described above, the medicine mixing and discharging apparatus of the present invention comprises a discharging device, a water supply channel connected to the discharging device, a first on-off valve for opening and closing water flowing through the water supply channel, A drug container containing a water-soluble drug, a release path connecting the water supply path to the drug container, release means for releasing a drug aqueous solution in the drug container into the water supply path via the release path, A water level detecting means provided in the container, an inflow path connecting the water supply path to the medicine container, and a second opening / closing valve section provided in the inflow path and opening a water level within a predetermined water level range based on the water level detecting means Since the outlet portion of the discharge path from the medicine container is located slightly below the lower limit position of the predetermined water level range, the medicine container can be formed separately from the ejection device, and There are no restrictions on the size, and a large amount of drug can be stored in the drug container. When the aqueous solution of the medicine in the medicine container is saturated, the water level is detected by the water level detecting means, and the second on-off valve is opened within a predetermined water level range to automatically supply water into the medicine container. A saturated aqueous solution of the medicine can be taken out and discharged into the water supply channel from an outlet provided at a position slightly lower than the lower limit position of the water level range.

Moreover, a stable saturated aqueous solution can be discharged into the spouting water for a long period of time without adjusting the concentration of the aqueous drug solution.

When the water level detecting means is constituted by a level sensor and the second opening / closing valve section is constituted by an electromagnetic valve, and the electromagnetic valve section is opened within a predetermined water level range based on the water level signal of the level sensor, the electromagnetic valve is opened. The installation position can be installed at any position in the inflow channel.

The water level detecting means and the second opening / closing valve section may be constituted by a ball tap having a float and a valve which opens and closes in cooperation with the float, and in this case, a mechanical mechanism can be realized at low cost. .

If the drug is ascorbic acid and this aqueous solution of ascorbic acid is discharged into the water supply channel, residual chlorine in tap water passing through the discharge device can be removed.

By locating the opening of the inflow passage into the medicine container below the container, the replenished water does not flow directly from the outlet, and a saturated aqueous solution having a stable concentration can be discharged.

It is preferable to provide a specific gravity detector for detecting the specific gravity of the aqueous solution of the drug in the drug container, and to notify the replenishment of the drug when the specific gravity of the aqueous solution of the drug becomes lighter than a predetermined specific gravity. Notify the person that the concentration of the aqueous drug solution released from the outlet has fallen below a predetermined concentration,
It can encourage drug replenishment.

The discharging means is constituted by a pump device,
It is preferable to provide a sensor unit for detecting the open / close state of the first opening / closing valve unit, and to operate the pump device when the first opening / closing valve unit is open. A stable amount of drug solution can be discharged into the water only when the pump is present, and the pump device can be installed at any place inside or outside the drug container.

The discharging means may be constituted by a venturi portion provided at the junction of the water supply channel and the discharging channel. In this case, no electric wiring is required and the cost can be reduced.

If a constant flow valve is provided in the middle of the water supply passage, a predetermined amount of a drug-saturated aqueous solution is always mixed into a stable amount of spouting water, and the spouting water contains a stably diluted amount of drug from the discharger. Can be released.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a schematic view of the same.

FIG. 3 is a schematic diagram of the same pump device.

FIG. 4 is a schematic diagram of the sensor unit.

FIG. 5 is a graph showing a change in the concentration of a drug aqueous solution in a drug container.

FIG. 6 is a schematic view of a second embodiment of the present invention.

FIG. 7 is a schematic diagram of the venturi section.

[Explanation of symbols]

 1: Hair washer 2: Upper surface 3: First open / close valve part 4: Discharge tool 5: Flexible hose part 6: Water supply channel 7: Hot and cold water mixing faucet 8: Drug container 9: Level sensor 10: Specific gravity detection unit 11: No. 2 opening / closing valve portion 12: pump device 13: control device 14: pump unit 15: first shaft 16: first float 17: second shaft 18: second float 19: opening 20: inflow passage 21 : Outlet section 22: Release path 23: Roller 24: Tube 25: Sensor section 26: Lid swirling flow generating member 27: Ball member 28: Detection element 29: Switch section 30: Constant flow valve 31: Lid 32: Transparent window section 33: alarm device 34: float 35: valve 36: ball tap 37: discharge pipe 38: check valve 39: junction 40: venturi L: first water level (lower limit position) H: second water level (upper limit position) )

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Claims (9)

[Claims] 1. A discharge device, a water supply passage connected to the discharge device, a first opening / closing valve for opening and closing water flowing through the water supply passage, a medicine container containing a water-soluble medicine, and the water supply passage. A discharge path for communicating the aqueous solution of the drug in the drug container into the water supply path via the release path; a water level detection means provided in the drug container; An inflow passage communicating between the inflow passage and the medicine container; and a second opening / closing valve portion provided in the inflow passage and opening within a predetermined water level range based on the water level detection means. Is located slightly below the lower limit position of the predetermined water level range. 2. The water level detecting means comprises a level sensor and the second on-off valve comprises an electromagnetic valve, and the electromagnetic valve is opened within a predetermined water level range based on a signal from the level sensor. The medicine mixing and discharging device according to claim 1, wherein: 3. The method according to claim 2, wherein the water level detecting means and the second on-off valve part are
The medicine mixing and discharging device according to claim 1, comprising a ball tap having a float and a valve that opens and closes in cooperation with the float. 4. The apparatus according to claim 1, wherein the medicine is ascorbic acid, and the ascorbic acid aqueous solution is discharged into a water supply passage. 5. The medicine mixing and discharging apparatus according to claim 1, wherein an opening of the inflow passage into the medicine container is located below the medicine container. 6. A specific gravity detecting section for detecting a specific gravity of a drug aqueous solution is provided in the drug container, and when the specific gravity of the drug aqueous solution becomes lighter than a predetermined specific gravity, the supply of the drug is notified. A drug-mixing / ejection device according to any one of claims 1 to 5. 7. The pump device according to claim 1, wherein said discharge means comprises a pump device, and a sensor unit for detecting an open / close state of said first on-off valve is provided. 7. The method according to claim 1, wherein
The drug-mixed ejection device according to any one of claims. 8. The apparatus according to claim 1, wherein said discharge means comprises a venturi provided at a junction of said water supply passage and said discharge passage. 9. The apparatus according to claim 1, wherein a constant flow valve is provided in the water supply passage.