JP2016022420A - Sterilized water generator and check valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the reverse flow of liquid from a tank storing the liquid while preventing the supply of air into the tank and the discharge of the air from the tank from being disturbed.SOLUTION: A sterilized water generator producing sterilized water by mixing a solution as a source of the sterilized water with water comprises: a sterilized water tank where the solution and water are mixed; an air supply/discharge passage connected to the sterilized water tank to supply air into the sterilized water tank and discharge the air from the sterilized water tank; and a check valve 300 provided in the air supply/discharge passage to prevent the reverse flow of the liquid from the sterilized water tank. The check valve 300 comprises: a housing part 310 into which the air passing through the air supply/discharge passage flows; a communication hole 331 provided inside the housing part 310 to allow the passage of the air flowing into the housing part 310; and a movable part 350 moving by buoyancy due to the liquid to close the communication hole 331 when the liquid flows into the housing part 310 from the sterilized water tank.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a sterilizing water generator and a check valve.

Patent Document 1 discloses a sterilizing water generating apparatus that mixes a stock solution measured by a stock solution measuring unit and tap water measured by a tap water tank in a sterilizing water tank to generate sterilizing water.
In such a sterilizing water production | generation apparatus, when supplying the sterilization water produced | generated in the sterilization water tank to the exterior of an apparatus, compressed air is supplied to a sterilization water tank via an air supply discharge path. In addition, when supplying tap water as the source of sterilizing water to the sterilizing water tank, the same amount of air as the tap water supplied to the sterilizing water tank is discharged from the sterilizing water tank to the air supply discharge path. The

JP 2013-169505 A

By the way, when an excessive amount of liquid is supplied to a tank in which liquid such as a sterilizing water tank is stored, the liquid overflows from the tank, and the liquid flows backward in a pipeline connected to the tank such as an air supply / discharge path. There is a case.
On the other hand, in order to suppress the back flow of liquid from the tank, when a rubber valve or the like is provided in a pipe line connected to the tank, the rubber valve can be used to supply air to the tank or from the sterilizing water tank. It may be difficult to exhaust air.
An object of the present invention is to suppress the backflow of liquid from the tank while suppressing the supply of air to the tank in which the liquid is stored and the discharge of air from the tank from being hindered.

For this purpose, a sterilizing water generator to which the present invention is applied is a sterilizing water generator that generates sterilizing water by mixing a solution that is a source of sterilizing water and water, and the solution and water are mixed. A sterilizing water tank to be mixed, connected to the sterilizing water tank, supplying air to the sterilizing water tank, and provided in the air supply / discharge path for discharging air from the sterilizing water tank; A check valve that suppresses the backflow of liquid from the sterilizing water tank, and the check valve is provided in a housing into which air passing through the air supply / discharge path flows, A communication portion through which air that has flowed into the housing passes; and a moving member that moves by buoyancy due to liquid and closes the communication portion when liquid flows into the housing from the sterilizing water tank. This is a sterilizing water generator.
Here, when the liquid flows into the housing, the moving member is attached to the floating member that moves toward the communicating portion by floating in the liquid, and the floating member floats in the liquid It has the valve member which block | closes the said communication part by this.
The check valve protrudes from the periphery of the communication portion toward the valve member, and generates air flow that presses the valve member in a direction away from the communication portion when air is supplied into the housing. It can be characterized by further having a convex portion to be caused. In this case, it can suppress that passage of the air in a communication part is prevented by the valve member.

From another point of view, the check valve to which the present invention is applied is connected to the housing into which air flows when the air is supplied to the tank in which the liquid is stored. A first joint through which air flowing into the housing passes, a second joint connected to the housing and discharging the air flowing into the housing through the first joint toward the tank, and the housing When the liquid flows into the casing through the second joint and the communication portion provided inside the body through which the air flowing into the casing passes, the buoyancy caused by the liquid moves and the It is a check valve having a moving member that closes the communication portion.
Here, when the liquid flows into the housing, the moving member is attached to the floating member that floats on the liquid and approaches the communicating portion, and the floating member. And a valve member that closes the communication portion.
The second joint may be connected to the housing at a position away from the communicating portion in the moving direction of the moving member as compared to the floating member. In this case, it is possible to suppress the generation of air vortices in the housing.

  ADVANTAGE OF THE INVENTION According to this invention, the backflow of the liquid from a tank can be suppressed, suppressing that the supply of the air to the tank in which a liquid is accommodated, and the discharge | emission of the air from a tank are prevented.

It is the perspective view which showed the whole structure of the dental treatment apparatus with which this embodiment is applied. It is an external appearance perspective view of the sterilization water production | generation apparatus with which this embodiment is applied. It is the perspective view which showed the internal structure of the disinfection water production | generation apparatus. It is a functional block diagram of the sterilizing water production | generation apparatus with which this embodiment is applied. (A)-(b) is the figure which showed the structure of the non-return valve of this embodiment. (A)-(b) is the figure which showed the flow of the air in a non-return valve. It is the figure which showed the non-return valve of the state which the sterilization water, the tap water, etc. flowed back from the sterilization water tank.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a perspective view showing an overall configuration of a dental medical apparatus 1 to which the present embodiment is applied.
As shown in the figure, in the dental medical device 1 of this embodiment, a medical table 2 is provided on the floor surface. Further, in the dental medical device 1 of the present embodiment, a doctor tray table 3 and a doctor instrument holder 4 are provided beside the medical table 2. Furthermore, in this embodiment, an instrument holder 5 for an assistant is provided on the opposite side of the tray table 3 with the medical table 2 interposed therebetween. Moreover, in this embodiment, the support | pillar 6 which supports the dental light (not shown) provided with the light source and the arm (not shown) which supports a dental light is provided.

  Moreover, in this embodiment, the supply apparatus (spitton apparatus) 7 which supplies water with respect to the cup used when a patient gargles is provided by the side of the treatment table 2. The supply device 7 includes a base unit 7a, a waste liquid receiving part (basin) 7b installed on the base unit 7a for receiving the waste liquid discharged from the patient's oral cavity, and a cup provided beside the waste liquid receiving part 7b. On the other hand, a cup water supply unit (not shown) for supplying water and a cleaning water supply unit 7c for supplying cleaning water to the waste liquid receiving unit 7b are provided.

Further, in the present embodiment, a sterilizing water generating device 8 is provided beside the medical table 2 and adjacent to the supply device 7.
The sterilizing water generator 8 is used for generating sterilizing water. The sterilized water produced | generated in the sterilized water production | generation apparatus 8 is sent to the supply apparatus 7 mentioned above, for example, and is used when a patient treats or a patient gargles.
Note that “sterilization” generally means that bacteria and the like are eliminated to create a sterile state. However, in the description of this embodiment, “sterilization” is not limited to eliminating bacteria and the like. And the like (sterilization, sterilization) that inactivate etc. or remove at least a part of bacteria and the like.

Then, the structure of the sterilizing water production | generation apparatus 8 is demonstrated.
FIG. 2 is an external perspective view of the sterilizing water generator 8 to which the present embodiment is applied.
The sterilizing water generator 8 of the present embodiment includes a main body case 81, a storage part 82 in which a stock solution cartridge is stored, and a sterilizing water tank storage part 83 in which a sterilizing water tank is stored. Moreover, the sterilizing water production | generation apparatus 8 is provided with the external connection plug 500 used for a connection with an external apparatus. Furthermore, the sterilizing water production | generation apparatus 8 is provided with the power switch 84 for switching ON / OFF of the sterilization water production | generation apparatus 8, and the operation panel 600 which displays an information previously with respect to a user and receives operation from a user. . The power switch 84 is provided on the side surface of the main body case 81, and the operation panel 600 is provided on the upper surface of the main body case 81.
Further, the sterilizing water generator 8 of the present embodiment is provided with a filter cartridge 100 which is an example of a filter for removing impurities (foreign matter) contained in tap water supplied into the sterilizing water generator 8. . The filter cartridge 100 is attached to the side surface of the main body case 81.
Further, the sterilizing water generating device 8 is provided with a water supply joint 85 as an example of a water supply unit to which a water pipe (not shown) of another device is connected. And in the sterilizing water production | generation apparatus 8 of this embodiment, it can supply the tap water after an impurity was removed with the filter cartridge 100 with respect to the other apparatus connected via the water supply joint 85. FIG. .

FIG. 3 is a perspective view showing the internal structure of the sterilizing water generator 8. FIG. 3 shows the sterilizing water generator 8 with the filter cartridge 100 removed.
As shown in FIG. 3, an attachment portion 150 for attaching the filter cartridge 100 is provided on the side surface of the main body case 81 of the sterilizing water generator 8.
As shown in the figure, a tap water tank 13 for storing tap water supplied from the outside via an external connection plug 500 is provided inside the sterilizing water generator 8. Moreover, in this embodiment, the stock solution cartridge 20 which was provided so that attachment or detachment with respect to the sterilization water production | generation apparatus 8 and accommodated the stock solution which becomes the origin of sterilization water is provided. Furthermore, a stock solution metering unit 23 for metering the stock solution supplied from the stock solution cartridge 20, a first sterilizing water tank 30 for storing the generated sterilizing water, and a second sterilizing water tank 33 are provided.

  In this embodiment, sodium hypochlorite is accommodated in the stock solution cartridge 20 as a liquid (stock solution) that is the source of sterilizing water. The stock solution is not limited to this, and for example, chlorine dioxide, a mixture of sodium hypochlorite and chlorine dioxide, a chlorinated aqueous solution thereof, or the like may be used. Further, for example, oxidizing sterilizing water such as hydrogen peroxide water or ozone water may be used as a stock solution, and another stock solution may be used.

FIG. 4 is a functional block diagram of the sterilizing water generator 8 to which the present embodiment is applied.
The sterilizing water generator 8 of this embodiment is provided with a water receiving plug 10 to which a supply pipe (not shown) for supplying tap water is connected.
Further, the sterilizing water generator 8 is branched from the first water supply path 11a and the first water supply path 11a through which the tap water passing through the water receiving plug 10 passes, and the second water supply joint 85 is connected to the terminal at the end. On the first water supply channel 11a, the filter cartridge 100 that is provided on the water channel 11b and the first water supply channel 11a and is branched before the second water supply channel 11b and removes impurities from the tap water that has passed through the water receiving plug 10 There is provided a tap water tank 13 having a solenoid valve 12 and a water receiving hole 13a provided after branching from the second water supply passage 11b and accommodating tap water from the first water supply passage 11a.

Here, the tap water tank 13 of the present embodiment is supplied with tap water from the first water supply path 11a through the water receiving hole 13a and is supplied to the first sterilizing water tank 30 or the second sterilizing water tank 33. A water storage unit 14 that stores tap water, and a drain pocket 15 as an example of a water receiving unit that is connected to the water storage unit 14 via the connection unit 13b and that overflows the water storage unit 14 flows from the connection unit 13b. ing.
The drain pocket 15 of the tap water tank 13 is connected to a first discharge path 28 that guides tap water or the like overflowing from the water storage section 14 to the trap 200 described later.
A trap 200, which will be described later, is connected to the end of the first discharge path 28, and a tap water or the like led to the trap 200 is discharged to the drain via a drain plug 49 described later. Two discharge paths 29 are connected. The trap 200 is provided to suppress the entry of odors, bacteria, and the like from the drain into the sterilizing water generator 8.

  The sterilizing water generator 8 is provided with a first tap water supply path 17a and a second tap water supply path 17b through which tap water from the water storage section 14 in the tap water tank 13 passes. Further, a first electromagnetic valve 16a is provided on the first tap water supply path 17a, and a second electromagnetic valve 16b is provided on the second tap water supply path 17b. Moreover, in this embodiment, the liquid level sensor 18 which detects the liquid level of the tap water in the water storage part 14 of the tap water tank 13 is provided. Here, in the liquid level sensor 18, the liquid level of tap water is detected at the detection position b and the detection position c that are shifted from each other in the vertical direction. The detection position a and the detection position d located at both ends are detection positions for backup where the liquid level is detected when the liquid level is not detected at the detection position b and the detection position c.

  On the other hand, on the side of the stock solution cartridge 20, the pump 22 for sucking out the stock solution from the stock solution cartridge 20, the stock solution measuring unit 23 for measuring the stock solution sent by the pump 22, and the liquid level of the stock solution in the stock solution measuring unit 23 are shown. A liquid level sensor 24 for detection is provided. Note that the liquid level sensor 24 also detects the level of the stock solution at the detection position b and the detection position c. In addition, when the liquid level is not detected at the detection position b and the detection position c, the liquid level is detected at the detection position a and the detection position d.

Further, the sterilizing water generator 8 is provided with a first stock solution supply path 26a and a second stock solution supply path 26b through which the stock solution from the stock solution metering unit 23 passes. In the present embodiment, the first electromagnetic valve 25a is provided on the first stock solution supply path 26a, and the second solenoid valve 25b is provided on the second stock solution supply path 26b. Further, the sterilizing water generator 8 is provided with a drainage path 27 for discharging the stock solution overflowing from the stock solution measuring unit 23 to the drain pocket 15 of the tap water tank 13.
In the present embodiment, the four supply paths of the first stock solution supply path 26a, the second stock solution supply path 26b, the first tap water supply path 17a, and the second tap water supply path 17b are provided independently. In addition, the tap water and the undiluted solution are not mixed before the tap water and the undiluted solution reach the sterilized water tank (the first sterilized water tank 30 and the second sterilized water tank 33).

  The sterilizing water generator 8 includes a liquid level sensor 32 that detects the level of the sterilizing water in the first sterilizing water tank 30 and a liquid level sensor 34 that detects the surface of the sterilizing water in the second sterilizing water tank 33. Is provided. Here, as described above, the liquid level sensor 32 and the liquid level sensor 34 detect the liquid level at the detection position b and the detection position c. In addition, when the liquid level is not detected at the detection position b and the detection position c, the liquid level is detected at the detection position a and the detection position d.

  In the present embodiment, a first sterilizing water supply path 31 through which sterilizing water from the first sterilizing water tank 30 passes and a second sterilizing water supply path 35 through which sterilizing water from the second sterilizing water tank 33 passes are provided. Yes. Further, a first electromagnetic valve 36 a and a first check valve 37 a are provided on the first sterilizing water supply path 31, and a second electromagnetic valve 36 b and a second check valve are provided on the second sterilizing water supply path 35. A valve 37b is provided.

  Furthermore, in this embodiment, a plug 40 for compressed air to which a supply pipe (not shown) for supplying compressed air is connected is provided. The compressed air plug 40 is provided on the external connection plug 500 (see FIG. 2). The first compressed air supply / exhaust used to supply compressed air that has passed through the compressed air plug 40 to the first sterilizing water tank 30 and to discharge compressed air from the first sterilizing water tank 30. A path 42a is provided. Further, the compressed air that branches off from the first compressed air supply / exhaust passage 42 a and passes through the compressed air plug 40 is used to supply the second sterilized water tank 33 and is compressed from the second sterilized water tank 33. A second compressed air supply / exhaust passage 42b used for discharging air is provided.

Further, the compressed air plug 40 passes on the first compressed air supply / exhaust passage 42a and in front of the branch portion with the second compressed air supply / exhaust passage 42b (on the compressed air plug 40 side). A pressure reducing valve 44 for reducing the pressure of the compressed air is provided.
Here, in the present embodiment, the first compressed air supply / exhaust path 42a and the second compressed air supply / exhaust path 42b constitute an air discharge path or an air supply / discharge path.

  A first three-way solenoid valve 41a and a first check valve 300a are provided on the first compressed air supply / exhaust passage 42a, and a second three-way solenoid valve is provided on the second compressed air supply / exhaust passage 42b. 41b and a second check valve 300b are provided. Further, the first silencer 400a is connected to the normally open (normally open port) of the first three-way solenoid valve 41a, and the second silencer 400b is connected to the normally open (normally open port) of the second three-way solenoid valve 41b. Has been. Here, the first check valve 300a and the second check valve 300b have the same configuration, and the first silencer 400a and the second silencer 400b have the same configuration. In the following description, the first check valve 300a and the second check valve 300b are collectively referred to as the check valve 300 without being distinguished, and the first silencer 400a and the second silencer 400b are collectively referred to without being distinguished. Sometimes referred to as silencer 400.

  Here, the check valve 300 causes the sterilized water to flow from the first sterilized water tank 30 or the second sterilized water tank 33 to the first three-way electromagnetic valve 41a due to an abnormality in the system such as poor solenoid valve closing or erroneous detection of the liquid level sensor. Alternatively, it is provided to prevent the sterilizing water from flowing back into the sterilizing water generating device 8 by flowing backward to the second three-way solenoid valve 41b side. Moreover, the silencer 400 is provided in order to reduce a discharge sound when compressed air is discharged into the sterilizing water generator 8 via the first three-way solenoid valve 41a or the second three-way solenoid valve 41b. The configuration of the check valve 300 will be described in detail later.

  Moreover, the sterilizing water production | generation apparatus 8 of this embodiment passes the sterilizing water which passed the manifold 45 which combines the 1st sterilizing water supply path 31 and the 2nd sterilizing water supply path 35 into one sterilizing water supply path, and the manifold 45. A sterilizing water supply path 46 is provided. Further, the sterilizing water generating device 8 is provided on the sterilizing water supply path 46 and provided at the end of the sterilizing water supply path 46, a throttle valve 48 for reducing the flow rate of the sterilizing water flowing through the sterilizing water supply path 46. A supply plug 47 to which a sterilizing water transport pipe (not shown) provided outside the water generator 8 is connected is provided. Here, the manifold 45 and the supply plug 47 are provided in the above-described external connection plug 500 (see FIG. 2).

Furthermore, the sterilizing water generator 8 guides the sterilizing water generated in the first sterilizing water tank 30 and the second sterilizing water tank 33 and passing through the manifold 45 to the drain pocket 15 of the tap water tank 13. A path 38 is provided. Further, a drain electromagnetic valve 39 is provided on the sterilizing water guide path 38.
Further, the sterilizing water generator 8 has a drain for drainage of sterilizing water, tap water, etc. that has flowed from the drain pocket 15 of the tap water tank 13 via the first discharge path 28 and the second discharge path 29. A plug 49 is provided.
In the present embodiment, the circuit board 51 is provided in the operation panel 600 shown in FIG. Moreover, in this embodiment, the control part 50 comprised by CPU by which program control was carried out and which controls the electromagnetic valve etc. which were provided in this circuit board 51 and the sterilizing water production | generation apparatus 8 is provided.

Here, the tap water of the dilution water used for diluting the stock solution is supplied to the water storage unit 14 of the tap water tank 13 through the water receiving plug 10, the filter cartridge 100, the electromagnetic valve 12, and the first water supply path 11 a. And in this embodiment, tap water is supplied to the detection position b of the liquid level sensor 18 in the water storage part 14 in the tap water tank 13.
On the other hand, the stock solution is supplied from the stock solution cartridge 20 to the stock solution metering unit 23 by the pump 22. In the stock solution metering unit 23, the stock solution is supplied to the detection position b of the liquid level sensor 24. Thereafter, the control unit 50 opens the first electromagnetic valve 25a or the second electromagnetic valve 25b. As a result, the stock solution in the stock solution metering unit 23 falls by its own weight and is supplied to the first sterilizing water tank 30 or the second sterilizing water tank 33.

  The opened first electromagnetic valve 25a or second electromagnetic valve 25b is closed after the supply of the stock solution is completed. Thereafter, the stock solution metering unit 23 supplies the stock solution again to the stock solution metering unit 23 to prepare for the next stock solution supply. In the present embodiment, the supply of the stock solution to the first sterilizing water tank 30 or the second sterilizing water tank 33 is repeated a predetermined number of times. For example, when sterilizing water such as gargle water is generated, the stock solution for one metering is supplied to the first sterilizing water tank 30 or the second sterilizing water tank 33, but sterilizing water with improved sterilizing effect is generated. In this case, the undiluted solution for twice or three times measurement is supplied to the first sterilizing water tank 30 or the second sterilizing water tank 33.

  Moreover, in this embodiment, after supply of the stock solution to the 1st sterilization water tank 30 or the 2nd sterilization water tank 33, it reaches the tap water (the detection position b of the liquid level sensor 18) of the water storage part 14 in the tap water tank 13. Tap water) is supplied to the first sterilizing water tank 30 or the second sterilizing water tank 33 by opening the first electromagnetic valve 16a or the second electromagnetic valve 16b. Here, this supply is performed by utilizing the own weight of tap water.

  When the tap water is supplied to the first sterilizing water tank 30 or the second sterilizing water tank 33, the first three-way electromagnetic valve 41a or the second three-way electromagnetic valve 41b is opened. Thereby, the discharge of air from the first sterilizing water tank 30 or the second sterilizing water tank 33 is performed more smoothly.

  Here, when the tap water is supplied to the first sterilizing water tank 30 or the second sterilizing water tank 33, the air corresponding to the volume of the tap water is discharged from the first sterilizing water tank 30 or the second sterilizing water tank 33. Is done. In this case, when the first three-way electromagnetic valve 41a or the second three-way electromagnetic valve 41b is opened, air is smoothly discharged from the first sterilizing water tank 30 or the second sterilizing water tank 33. Note that the air discharged from the first sterilizing water tank 30 or the second sterilizing water tank 33 passes through the normally open (normally open port) of the first three-way solenoid valve 41a or the second three-way solenoid valve 41b and passes through the first silencer 400a. Alternatively, the water is smoothly discharged into the sterilizing water generator 8 through the second silencer 400b.

  In the sterilizing water generator 8 of the present embodiment, when the supply amount of tap water supplied through the water receiving plug 10 is smaller than a predetermined value, the sterilizing water supply path 46 is opened by the throttle valve 48. The flow rate of flowing sterilizing water can be reduced. Thus, for example, the amount of tap water supplied to the tap water tank 13 or the amount of sterilized water generated in the sterilized water tank (the first sterilized water tank 30 or the second sterilized water tank 33) It is suppressed that the quantity of the sterilization water supplied to the exterior of the sterilization water production | generation apparatus 8 through the plug 47 becomes excessive too much. As a result, for example, when the sterilizing water is continuously supplied from the sterilizing water generating device 8, an increase in the supply amount of the sterilizing water with respect to the generated amount of the sterilizing water is suppressed, and the sterilizing water is stably supplied. Will come to be.

  In the above description, an example in which the tap water is supplied after supplying the stock solution to the first sterilizing water tank 30 or the second sterilizing water tank 33 has been described. However, the first sterilizing water tank 30 or the second sterilizing water tank is described. The supply of the stock solution and the supply of tap water to 33 may be performed in parallel. Further, for example, the stock solution may be supplied after the tap water is supplied. As in this embodiment, the supply of the stock solution is performed first, and then the tap water is supplied in the case where the stock solution and the tap water are supplied in parallel, or the tap water is more than the stock solution. As compared with the case where the liquid is supplied first, the stock solution and the tap water are mixed more effectively.

Next, the operation when the generated sterilized water is supplied to the outside will be described.
When sterilizing water is supplied to the outside, first, compressed air (compressed air) decompressed to a predetermined pressure by the pressure reducing valve 44 is supplied to the first compressed air supply / exhaust passage 42a or the second compressed air supply / exhaust. It is supplied into the first sterilizing water tank 30 or the second sterilizing water tank 33 via the path 42b. When compressed air is supplied into the first sterilizing water tank 30 or the second sterilizing water tank 33, the inside of the first sterilizing water tank 30 or the second sterilizing water tank 33 is in a pressurized state, and the first sterilizing water tank 33 The sterilizing water in the water tank 30 or the second sterilizing water tank 33 is supplied to the outside of the sterilizing water generator 8.

  More specifically, when the inside of the first sterilizing water tank 30 or the second sterilizing water tank 33 is pressurized, the sterilizing water is supplied from the first sterilizing water supply path 31 or the second sterilizing water supply path 35, the manifold 45, And, it is supplied to the supply plug 47 via the sterilizing water supply passage 46. Then, it is supplied to the outside of the sterilizing water generator 8 through the supply plug 47.

  In addition, although description was abbreviate | omitted above, in this embodiment, while supplying sterilization water from either one of the 1st sterilization water tank 30 and the 2nd sterilization water tank 33, this one sterilization water is performed. When the water tank is empty, it is switched to the other sterilizing water tank. Thereby, supply of sterilizing water will not be delayed. When switching to the other sterilizing water tank, generation of sterilizing water is started in the one sterilizing water tank. Then, when the other sterilizing water tank becomes empty, switching to one sterilizing water tank is performed.

  Whether or not the sterilizing water tank is empty is determined based on the detection of the liquid level at the detection position c provided in each of the liquid level sensor 32 and the liquid level sensor 34. In addition, the switching of the sterilizing water tank is performed by opening / closing the first three-way solenoid valve 41a provided on the first compressed air supply / exhaust passage 42a and the second compressed air supply / exhaust passage 42b. 2 Opening / closing the three-way electromagnetic valve 41b, opening / closing the first electromagnetic valve 36a provided on the first sterilizing water supply path 31, and the second electromagnetic valve provided on the second sterilizing water supply path 35 This is done by opening / closing 36b.

  Further, in the present embodiment, when switching from one sterilizing water tank to the other sterilizing water tank as the sterilizing water is consumed, the sterilizing water supplied to the outside is restrained from pulsation and a decrease in flow rate. The first electromagnetic valve 36a and the second electromagnetic valve 36b are controlled so that sterilized water is simultaneously supplied from the two sterilized water tanks for a predetermined time (several msec). In addition, control is performed to overlap the supply timing at which sterilizing water is supplied between one sterilizing water tank and the other sterilizing water tank.

Next, the configuration of the check valve 300 (the first check valve 300a and the second check valve 300b) will be described. As described above, in the present embodiment, the first check valve 300a and the second check valve 300b (both see FIG. 4) have the same configuration.
FIG. 5A to FIG. 5B are diagrams showing a configuration of the check valve 300 of the present embodiment, and FIG. 5A is a perspective view of the check valve 300, and FIG. b) is a cross-sectional view showing the internal structure of the check valve 300.

  As shown in FIG. 5A to FIG. 5B, the check valve 300 of this embodiment includes a cylindrical housing portion 310 in which a columnar space is formed, and a housing portion 310. A first joint 321 protruding from above and connected to the first three-way solenoid valve 41a or the second three-way solenoid valve 41b via the first compressed air supply / exhaust passage 42a or the second compressed air supply / exhaust passage 42b; A second joint 322 protruding from the side of the portion 310 and connected to the first sterilizing water tank 30 or the second sterilizing water tank 33 via the first compressed air supply / exhaust passage 42a or the second compressed air supply / exhaust passage 42b. And have. In the check valve 300 of the present embodiment, the housing 310, the first joint 321 and the second joint 322 are made of a material having high rigidity such as stainless steel. As a result, pressure resistance when high pressure air is supplied into the check valve 300 is enhanced.

As shown in FIG. 5B, the check valve 300 according to the present embodiment includes a fixed portion 330 fixed above the internal space of the housing portion 310, and the housing portion 310 with respect to the fixed portion 330. And a moving part 350 as an example of a moving member provided so as to be movable in the vertical direction.
The fixing portion 330 has a disk shape, and divides an internal space formed in the housing portion 310 into an upper space X1 and a lower space X2. In addition, the fixed portion 330 includes a communication hole 331 as an example of a plurality of communication portions that allow the upper space X1 and the lower space X2 to communicate with each other, and a shaft hole 332 into which a later-described moving shaft 351 of the moving portion 350 is inserted. Is provided. Further, a convex portion 333 protruding downward is provided on the surface of the fixed portion 330 on the side facing the lower space X2. Here, the convex part 333 is provided continuously over the whole area in the circumferential direction with respect to the disk-shaped fixing part 330.

The moving unit 350 includes a moving shaft 351 that can move in the vertical direction with respect to a shaft hole 332 provided in the fixed unit 330, and a float 352 as an example of a floating member attached to the lower end of the moving shaft 351. And a rubber valve 353 as an example of a valve member that is attached to the upper portion of the float 352 and contacts the convex portion 333 of the fixed portion 330 when the moving shaft 351 moves upward. Further, a disc-shaped regulating member 354 that regulates the downward movement of the moving shaft 351 is attached to the upper portion of the moving shaft 351.
The float 352 of the present embodiment is made of a resin material such as polyethylene or polypropylene, and has a hollow inside. Moreover, the rubber valve 353 is comprised from the sheet-like member which has elasticity, such as a synthetic rubber, for example.

In the check valve 300 of the present embodiment, the first joint 321 and the second joint 322 each have a cylindrical shape, and the first joint 321 and the second joint 322 are connected to the internal space of the housing unit 310. The outside of the check valve 300 is in communication.
Specifically, the first joint 321 is connected to the upper portion of the housing portion 310, and the upper space X <b> 1 formed in the housing portion 310 communicates with the outside of the check valve 300 by the first joint 321. doing. The second joint 322 is connected to the lower part of the housing part 310, and the lower space X <b> 2 formed in the housing part 310 communicates with the outside of the check valve 300 by the second joint 322. . In this example, as shown in FIG. 5B, the second joint 322 communicates with the lowermost part of the lower space X <b> 2 in the housing part 310.

Here, the check valve 300 of the present embodiment is shown in FIG. 5B in a normal state in which the reverse flow of the sterilizing water from the first sterilizing water tank 30 or the second sterilizing water tank 33 does not occur. Thus, the moving part 350 has stopped in the state which moved below.
Specifically, in the normal state in which no sterilizing water backflow occurs, the moving unit 350 is moved below the lower space X2 by gravity. Then, the restricting member 354 attached to the moving shaft 351 comes into contact with the upper surface of the fixed portion 330, thereby restricting the movement of the moving shaft 351 downward, so that the moving portion 350 is positioned at a predetermined position below the lower space X2. It has stopped.

Further, as shown in FIG. 5B, in the state where the moving part 350 is located below the lower space X <b> 2 in the check valve 300, the rubber valve 353 of the moving part 350 is in a state of being separated from the fixed part 330. ing. Thereby, the upper space X1 and the lower space X2 are connected via the communication hole 331.
Furthermore, as illustrated in FIG. 5B, in a state where the moving unit 350 is located below the lower space X <b> 2, the float 352 of the moving unit 350 is more than the position where the second joint 322 is connected to the housing unit 310. It is located vertically above.

Subsequently, the flow of air in the check valve 300 of the present embodiment will be described.
FIGS. 6A to 6B are views showing the air flow in the check valve 300. 6 (a) to 6 (b) show the check valve 300 in a state where no liquid backflow from the sterilizing water tank (the first sterilizing water tank 30 and the second sterilizing water tank 33) occurs. . FIG. 6B shows the air flow in the vicinity of the fixed portion 330 in the check valve 300.
First, the flow of air in the check valve 300 when supplying the generated sterilized water to the outside of the sterilized water generator 8 will be described. When supplying the sterilizing water to the outside, the air (compressed air) that has passed through the compressed air plug 40 and the pressure reducing valve 44 is the first compressed air supply / exhaust passage 42a or the second compressed air supply / exhaust passage 42b. , And after passing through the check valve 300, it is supplied into the first sterilizing water tank 30 or the second sterilizing water tank 33.

The air from the first compressed air supply / exhaust passage 42a or the second compressed air supply / exhaust passage 42b passes through the first joint 321 as shown by the solid line arrow in FIG. Flows into the upper space X1.
In a state where sterilizing water or the like does not flow back to the check valve 300, the rubber valve 353 is separated from the fixed portion 330, and the communication hole 331 of the fixed portion 330 is open. Therefore, the air that has flowed into the upper space X1 flows from the upper space X1 to the lower space X2 through the communication hole 331 as shown by the solid line arrow in FIG.
The air flowing into the lower space X2 is discharged to the outside of the check valve 300 via the second joint 322 and supplied to the first sterilizing water tank 30 or the second sterilizing water tank 33.

Next, the flow of air in the check valve 300 when tap water is supplied to the first sterilizing water tank 30 or the second sterilizing water tank 33 will be described. When tap water is supplied to the first sterilizing water tank 30 or the second sterilizing water tank 33, air corresponding to the volume of the tap water is discharged from the first sterilizing water tank 30 or the second sterilizing water tank 33.
The air discharged from the first sterilizing water tank 30 or the second sterilizing water tank 33 passes through the second joint 322 as shown by a broken line arrow in FIG. Flow into.

In a state where sterilizing water or the like does not flow back to the check valve, the rubber valve 353 is separated from the fixed portion 330 and the communication hole 331 of the fixed portion 330 is open. Therefore, the air that has flowed into the lower space X2 flows from the lower space X2 into the upper space X1 through the communication hole 331, as indicated by the dashed arrow.
Then, the air that has flowed into the upper space X <b> 1 is discharged to the outside of the check valve 300 through the first joint 321. The air discharged from the check valve 300 passes through the first compressed air supply / exhaust passage 42a or the second compressed air supply / exhaust passage 42b, and passes through the silencer 400 (first silencer 400a, second silencer 400b). And discharged into the sterilizing water generator 8.

Here, in the check valve 300 of the present embodiment, the float 352 of the moving unit 350 is positioned vertically above the position where the second joint 322 is connected to the housing unit 310.
Thereby, for example, the air flowing into the lower space X2 from the second joint 322 is suppressed from colliding with the float 352, and the occurrence of air vortices in the lower space X2 is suppressed. Moreover, it is suppressed that the float 352 vibrates or moves by the air that flows into the lower space X2. As a result, for example, air can be more smoothly moved from the lower space X2 to the upper space X1 as compared with a case where the float 352 and the second joint 322 have the same vertical position.

Further, in the check valve 300 of the present embodiment, the fixed portion 330 is provided with a convex portion 333. And as shown in FIG.6 (b), the clearance gap Y is formed between the convex part 333 and the housing | casing part 310 in the lower space X2 by providing the convex part 333 in the fixing | fixed part 330. As shown in FIG.
In the check valve 300 of this embodiment, as shown by a one-dot chain line arrow in FIG. 6, when air is discharged from the first sterilizing water tank 30 or the second sterilizing water tank 33, or the first sterilizing water tank 30 or the second sterilizing water tank 30. When air flows into the lower space X2, for example, when air is supplied to the sterilizing water tank 33, an airflow is generated from the upper side to the lower side due to the convex portion 333 and the gap Y. Then, the rubber valve 353 is pushed downward by the air flow, and the rubber valve 353 is prevented from coming into contact with the fixing portion 330 and the communication hole 331 is blocked. As a result, the movement of air between the compressed air plug 40 and the first sterilizing water tank 30 or the second sterilizing water tank 33 via the check valve 300 is performed more smoothly.

Next, the operation of the check valve 300 when sterilized water or the like flows backward from the sterilized water tank (the first sterilized water tank 30 and the second sterilized water tank 33) will be described.
FIG. 7 is a view showing the check valve 300 in a state where liquid such as sterilized water or tap water flows backward from the sterilized water tank.
For example, when excessive tap water is supplied to the first sterilizing water tank 30 or the second sterilizing water tank 33 due to an abnormality in the liquid level sensor 18, the first electromagnetic valve 16a, the second electromagnetic valve 16b, or the like, the first sterilization is performed. Liquids such as sterilizing water and tap water may overflow from the water tank 30 or the second sterilizing water tank 33 and may flow backward through the first compressed air supply / exhaust passage 42a or the second compressed air supply / exhaust passage 42b.

  The liquid flowing backward from the first sterilizing water tank 30 or the second sterilizing water tank 33 flows into the lower space X2 of the check valve 300 through the second joint 322. When the liquid continuously flows into the lower space X2 and the liquid level reaches the float 352, buoyancy is exerted on the float 352 by the flowing liquid. As a result, as shown in FIG. 7, the float 352 is pushed upward vertically, and the moving shaft 351 moves upward in the shaft hole 332, so that the entire moving unit 350 moves upward in the lower space X <b> 2.

Furthermore, as the liquid continues to flow into the lower space X2 and the moving part 350 moves upward, the rubber valve 353 of the moving part 350 contacts the convex part 333 of the fixed part 330 as shown in FIG. . Specifically, the disc-shaped rubber valve 353 contacts the annular convex portion 333 provided continuously in the circumferential direction with respect to the fixed portion 330 over the entire circumferential direction.
Here, in the state shown in FIG. 7, the entire moving portion 350 is pushed upward by the buoyancy acting on the float 352, so that the rubber valve 353 is pushed against the convex portion 333 of the fixed portion 330. Further, since the rubber valve 353 has elasticity, it is deformed by being pressed against the convex portion 333 of the fixed portion 330. Thereby, the adhesiveness of the rubber valve 353 and the convex part 333 increases.

When the rubber valve 353 comes into contact with the convex portion 333 of the fixed portion 330, the communication hole 331 is closed by the rubber valve 353, and the upper space X1 and the lower space X2 are divided by the rubber valve 353 and the fixed portion 330. Will come to be.
As a result, the liquid flowing into the lower space X2 through the second joint 322 is suppressed from flowing into the upper space X1 through the communication hole 331. Then, the liquid is suppressed from reaching the first three-way solenoid valve 41a or the second three-way solenoid valve 41b, the silencer 400, etc. through the first compressed air supply / exhaust passage 42a or the second compressed air supply / exhaust passage 42b. The In addition, leakage of liquid in the sterilizing water generator 8 is suppressed.

In addition, after discharging the liquid into the check valve 300, when discharging the flowed liquid out of the check valve 300, the first three-way solenoid valve 41a or the second three-way solenoid valve 42a is opened and compressed. What is necessary is just to supply the air from the air plug 40 into the check valve 300.
In this case, air from the compressed air plug 40 is supplied from the first joint 321 to the upper space X1. The rubber valve 353 is pressed downward through the communication hole 331 by the air supplied to the upper space X1. Thereby, the moving part 350 moves downward against the buoyancy caused by the liquid, and the rubber valve 353 is separated from the convex part 333 of the fixing part 330. As a result, air flows into the lower space X2 from the upper space X1 through the communication hole 331, the liquid in the lower space X2 is pushed by the air that flows into the lower space X2, and the liquid flows from the second joint 322 to the check valve. It is discharged to the outside of 300.

  As described above, in the check valve 300 of the present embodiment, the first sterilizing water tank is adopted by adopting a configuration in which the communication hole 331 is closed by the rubber valve 353 only when liquid such as sterilizing water enters. The exhaust from the 30 or the second sterilizing water tank 33 is suppressed from being blocked by the rubber valve 353, and the backflow of the liquid from the first sterilizing water tank 30 or the second sterilizing water tank 33 is suppressed.

  In addition, the sterilizing water production | generation apparatus 8 demonstrated by this embodiment can be used also as a central system by connecting two or more units | sets in parallel, and can also be extended according to the scale expansion of a facility. Moreover, although the sterilization water production | generation apparatus 8 used in dentistry was illustrated above, this sterilization water production | generation apparatus 8 can also be used as general medical equipment other than dentistry. More specifically, it can be used for hygiene management of a chemical solution administration line for artificial dialysis, for example.

DESCRIPTION OF SYMBOLS 1 ... Dental medical device, 8 ... Sterilization water production | generation apparatus, 13 ... Tap water tank, 14 ... Water storage part, 15 ... Drain pocket, 100 ... Filter cartridge, 200 ... Trap, 300 ... Check valve, 310 ... Case part 321 ... 1st joint, 322 ... 2nd joint, 330 ... fixed part, 331 ... communication hole, 333 ... convex part, 350 ... moving part, 351 ... moving shaft, 353 ... rubber valve, 400 ... silencer, 600 ... operation panel

Claims (6)

A sterilizing water generating device that generates sterilizing water by mixing water and a solution that is a source of sterilizing water,
A sterilizing water tank for mixing the solution and water;
An air supply / discharge passage connected to the sterilizing water tank, supplying air to the sterilizing water tank, and discharging air from the sterilizing water tank;
A check valve that is provided in the air supply / discharge passage and suppresses a back flow of liquid from the sterilizing water tank;
The check valve is
A housing into which air passing through the air supply / discharge passage flows;
A communication portion provided inside the housing, through which air flowing into the housing passes;
A sterilizing water generating apparatus comprising: a moving member that moves by buoyancy due to liquid and closes the communication portion when liquid flows into the casing from the sterilizing water tank. The moving member is
A floating member that moves toward the communicating portion by floating in the liquid when the liquid flows into the housing;
The sterilizing water generating device according to claim 1, further comprising: a valve member attached to the floating member, the valve member closing the communication portion when the floating member floats in a liquid.   The check valve protrudes from the periphery of the communication portion toward the valve member, and when air is supplied into the housing, the check valve generates an air flow that presses the valve member in a direction away from the communication portion. The sterilizing water generator according to claim 2, further comprising a section. A case in which air flows when supplying air to a tank containing liquid; and
A first joint connected to the housing and through which air flowing into the housing passes;
A second joint that is connected to the housing and discharges air flowing into the housing through the first joint toward the tank;
A communication portion provided inside the housing, through which air flowing into the housing passes;
A check valve having a moving member that moves by buoyancy due to liquid and closes the communication portion when liquid flows into the housing from the tank via the second joint. The moving member is
When a liquid flows into the housing, a floating member that approaches the communication part by floating in the liquid,
The check valve according to claim 4, further comprising: a valve member attached to the floating member and blocking the communication portion when the floating member floats in a liquid.   The said 2nd coupling is connected to the said housing | casing in the position away from the said communication part in the moving direction of the said moving member compared with the said floating member. Check valve.

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