JP2012175999A - Method and device for switching and cleaning fluid circuit of medical unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a cleaning liquid from counterflowing toward the tap water side by reliably switching between a supply circuit of the cleaning liquid and a supply circuit of the tap water in a medical unit.SOLUTION: A device for switching and cleaning fluid circuits of a medical unit is provided with a fluid circuit switching means which once separates a water supply source circuit A on the side of a water pressure source 2 from a fluid supply source circuit B from a fluid tank 11 on the side of an air pressure source 9 so that they may be out of touch and then connects one of the fluid circuits with a fluid circuit 29 in the medical unit. A fluid circuit switching means comprises: a switching means 1 which blocks the water supply source circuit A and connects the fluid supply source circuit B from the fluid tank 11 with the fluid circuit 29; a switching means 2 which blocks the fluid supply source B from the fluid tank 11 and connects the water supply source circuit A with the fluid circuit 29; and a switching means 3 which blocks both the fluid supply source B and the water supply source circuit A and blocks a fluid supply port toward the fluid circuit 29 in the medical unit so that the three circuits may be out of touch. It controls the switching between the switching means 1, 2 and 3.

Description

  The present invention relates to a fluid circuit switching cleaning method and apparatus for preventing water pollution of tap water due to the backflow of disinfecting / cleaning water to a tap water circuit when the fluid circuit of a medical unit is disinfected.

  Conventionally, pressured tap water adjusted to a constant normal pressure has been supplied to the medical unit and the instruments provided in the medical unit. Since this pressure tap water remains in the fluid circuit of the medical unit even after the medical treatment is completed, there is a problem that bacteria are propagated and become unsanitary before the medical treatment starts on the next day. Therefore, there has been a problem that the fluid circuit of the medical unit must be cleaned before the start of daily medical care.

  Therefore, as the cleaning of the fluid circuit of the medical unit, flushing, which is a cleaning method for discharging the residual fluid, or a cleaning method for supplying the chemical solution from the fluid tank into the fluid circuit and cleaning is performed. In addition, for example, overseas, tap water is not suitable for treatment in the oral cavity because it is unsanitary, so there are cases in which purified water is filled in a fluid tank and used. In addition, fluid circuits connected to water pipes and fluid tanks are generally switched by a switching valve such as a solenoid valve. In this case, the fluid circuit between the water pipe and the medical unit is directly connected. The fluid circuit between the water pipe and the medical unit is not completely separated.

  However, in the Waterworks Law, for example, a state where a sanitary water system that threatens sanitary safety, such as well water, industrial water, or cooling water, is connected to the water supply (drinking water system) is called a cross connection or mixed pipe. In this condition, when the water supply pressure exceeds the water supply pressure, the water supply fluid flows back into the drinking water system, or the water supply pressure becomes negative compared to the water supply pressure. Material may flow back into the drinking water system.

  Therefore, a gate valve and a backflow prevention device are installed at the connection part of the fluid pipe line, but these devices may also physically fail, and the negative pressure breaker may be used in reverse. No effect on pressure. Therefore, it cannot be said that the cross connection is completely avoided. For this reason, connection of such pipes is prohibited in principle by each ordinance in the Water Supply Law and Building Standard Law. In addition, as a technique related to this pipeline switching, for example, the inventions disclosed in Patent Document 1 and Patent Document 2 are known.

  The invention of Patent Document 1 can keep the chemical concentration of the chemical-diluted mixed water used for pipe cleaning even if the amount of water supply in the water supply pipeline changes, and can also use the chemical concentration for medical treatment. A water supply line cleaning device capable of such adjustment, and a dental medical device using the same.

  The invention of Patent Document 2 is a simple and complete disinfection of the water supply line to the medical device, the water supply line is not damaged by the residual disinfectant, and there is no contamination of the disinfectant even in the case of malfunction. It has a disinfecting and cleaning function.

  However, in both of Patent Documents 1 and 2, when disinfecting / cleaning the fluid circuit in the medical unit, the chemical solution stored in the fluid tank is supplied to the water circuit via the switching control valve, and the treatment is performed. The circuit of the chemical solution is switched to the water circuit, and all the fluid circuits are always connected. Therefore, the circuit of the chemical solution and the circuit of tap water are not completely separated, and there is a problem that the prevention of water pollution due to cross connection is incomplete.

JP 2010-104655 A Japanese Patent No. 3827048

  The problem to be solved is to make sure that the fluid circuit in the medical unit is switched between the chemical solution supply circuit used when disinfecting with the chemical solution and the tap water supply circuit used during treatment. This prevents the chemical liquid and the cleaning liquid from flowing back to the tap water side and safely cleans the inside of the medical unit.

In order to solve the above-mentioned problems, a fluid circuit cleaning method and apparatus for a medical unit according to the present invention includes a tap water supply source circuit A from a water pressure source side and a fluid tank filled with a cleaning fluid. In the fluid circuit switching to switch the fluid supply source circuit B from the side and supply one of the fluids to the fluid circuit in the medical unit,
After passing through the switching step 3 for separating the tap water supply source circuit A from the water pressure source side and the fluid supply source circuit B from the fluid tank side into a non-contact state once by the fluid circuit switching means, The switching means 2 connects the tap water supply source circuit A to the fluid circuit in the medical unit by the switching means, or the fluid supply source circuit B from the fluid tank side is connected to the fluid in the medical unit by the switching means. The fluid circuit in the medical unit is cleaned in a cleaning process including a switching step 1 connected to the circuit.

In the cleaning step, the switching step 2 is a step (S1) of supplying tap water from a water pressure source to a fluid circuit in the medical unit in a medical state,
The switching step 1 opens the fluid circuit in the medical unit, supplies the pressurized air filled in the fluid tank to the fluid circuit, discharges the residual fluid in the fluid circuit, and fills the fluid tank. A step of stopping the supply of pressurized air and returning the fluid circuit to normal pressure (S3),
A process (S2) that separates into a non-contact state when the process (S1) is shifted to the process (S3) is the switching process 3,
Further, as a step (S4), the cleaning liquid is supplied from the fluid tank filled with the cleaning liquid into the fluid circuit,
As a process (S5), the cleaning liquid is retained in the fluid circuit in the medical unit as necessary for the disinfection treatment,
In step (S6), the fluid circuit is opened, pressurized air filled in a fluid tank is supplied to the fluid circuit, and residual fluid in the fluid circuit is discharged.
Supplying the tap water from the fluid tank filled with tap water to the fluid circuit as the step (S7) to clean the inside of the fluid circuit;
Furthermore, the process (S8) that separates into the non-contact state when shifting from the process (S7) to the first process (S1) is the switching process 3.

According to a third aspect of the present invention, there is provided a bypass circuit for pressurized air that is branched upstream of the fluid tank and merges downstream of the fluid tank.
According to a fourth aspect of the present invention, there is provided a fluid circuit cleaning method, wherein the cleaning step is performed automatically.
According to a fifth aspect of the present invention, the fluid tank is filled with a fluid that is stored in a receiving container that temporarily receives the fluid, and then the water supply on-off valve is operated to drop the fluid by gravity. is there.
According to a sixth aspect of the present invention, the fluid tank is filled with fluid by operating a pump after the fluid is stored in a receiving container that temporarily receives the fluid.
According to a seventh aspect of the present invention, the fluid filled in the fluid tank is a cleaning liquid or drinking water.

An eighth aspect of the invention is characterized in that the fluid tank is pressurized with pressurized air to supply the fluid filled in the fluid tank into the fluid circuit of the medical unit. is there.
The ninth aspect is characterized in that the pressurized air is supplied from a pressurized air source.
According to a tenth aspect of the present invention, the pressurized air source is a pressurized air source from an external outlet attached to the medical unit.

11. A fluid circuit for switching between a water supply source made of tap water and a fluid supply source from a fluid tank filled with fluid to supply one of the fluids to a fluid circuit in the medical unit. In the switching device,
A switching process for once separating the circuit of the water supply source on the tap water side and the fluid supply source on the fluid tank side into a non-contact state, and after passing through the switching process for separating, the one of the fluid circuits is placed in the medical unit. And a fluid circuit switching means comprising a switching process connected to the fluid circuit.

  According to a twelfth aspect of the present invention, the fluid circuit switching means shuts off the water supply source circuit and connects the fluid supply source circuit from the fluid tank to the fluid circuit in the medical unit; And the switching means 2 for connecting the water supply source to the fluid circuit in the medical unit, and each of the fluid supply source and the water supply source from the fluid tank are shut off. And switching means 3 for shutting off the fluid supply port to the fluid circuit in the medical unit and bringing the three circuits into a non-contact state, and switching each of the switching means 1, the switching means 2, and the switching means 3 It is characterized by comprising a switching control means for controlling.

The thirteenth aspect is characterized in that the fluid tank is configured to be detachable in the vicinity of the medical unit.
According to a fourteenth aspect of the present invention, a receiving container for temporarily storing a fluid and supplying the fluid to the fluid tank as necessary is connected to the fluid tank.

  In the present invention, when disinfecting / cleaning the fluid circuit of the medical unit, either the tap water circuit or the fluid circuit connection ends of the fluid tank filled with the cleaning fluid is separated from each other to be in non-contact with each other. Was prevented from flowing back into the flow path on the other side, and was able to be washed.

These are the system diagrams of the fluid circuit of a dental care unit, and the fluid circuit of a washing | cleaning liquid. Example 1 These are operation explanatory drawings in the washing process of a fluid circuit switching device. Example 1 These are time charts in the cleaning process of the fluid circuit switching device. Example 1 FIG. 3 is a fluid circuit diagram of a dental care unit and cleaning liquid. (Example 2) FIG. 3 is a fluid circuit diagram of a dental care unit and cleaning liquid. (Example 3) FIG. 3 is a fluid circuit diagram of a dental care unit and cleaning liquid. Example 4 FIG. 3 is a perspective view of a fluid tank and a fluid circuit switching device. (Example 5) FIG. 3 is a perspective view of a fluid tank and a fluid circuit switching device. (Example 5) (A) (b) (c) is a front view which shows the structure and operation | movement of a fluid circuit switching apparatus. (Example 5) These are operation | movement explanatory drawings of the switching means 1, 2, and 3 of a fluid circuit switching device. (Example 5) (A) (b) (c) is a front view which shows the structure and operation | movement of a fluid circuit switching apparatus. (Example 6)

  The purpose of preventing the disinfecting liquid and the cleaning liquid from flowing back to the tap water side is to separate the circuit between the water supply source and the cleaning liquid supply source in a non-contact state once, and after the separation step, This is realized by providing fluid circuit switching means comprising a step of connecting any one of the fluid circuits to the fluid circuit in the medical unit.

  The present invention describes a fluid circuit of a dental care unit as an example. In this embodiment, the pipeline system configured in the dental care unit 1 is connected to a water pressure source 2 as shown in FIG. 1 and a tap water supply source circuit A is connected to the water supply open / close valve 3a in order toward the downstream side. A filter 4a, a check valve 5, a water supply opening / closing valve 3b, a pressure reducing valve 6a, and a filter 4b are connected, and a valve-connected joint male 7a is connected as a fluid circuit switching means. On the other hand, a fluid supply source circuit B is connected to the air pressure source 9, and a pressure reducing valve 6b, a pressure on-off valve 10, a fluid tank 11, and a check valve 5 are connected in order toward the downstream side, and the fluid circuit is switched to the tip. As a means, a valve-coupled joint male 7b is connected.

  The fluid in the connected pipe line is switched and controlled by a switching valve 19 that can be automatically actuated ahead, and a cup water supply 14 and a micro motor 15 that are placed ahead by opening and closing control of a plurality of solenoid valves 13, It is sent to handpieces such as a turbine 16, a scaler 17, and a three-way syringe 18. Further, by connecting the male and female joints 7a and 8a on the water pressure source 2 side and the female joints 8b and 7b with valves on the air pressure source 9 side so as not to contact each other, the fluid supply source from the fluid tank 11 and the water pressure Each of the water supply sources from the source 2 can be shut off, and the fluid supply port to the fluid circuit 29 in the dental care unit 1 can be completely shut off.

  Therefore, the fluid circuit switching in the present embodiment cuts off the water supply source circuit from the water pressure source 2 and connects the fluid supply source circuit B from the fluid tank 11 to the fluid circuit 29 in the dental care unit 1. Switching means 1, switching means 2 for shutting off the fluid supply source from the fluid tank and connecting the water supply source to the fluid circuit 29 in the dental care unit 1, fluid supply source circuit B and water supply from the fluid tank The switching circuit 3 controls the switching means 3 which shuts off each of the source circuits A and shuts off the fluid supply port to the fluid circuit 29 in the dental care unit 1 and brings the three circuits into a non-contact state. It is. The switching control method is defined as the switching process 1 is the process of switching control by the switching means 1, the switching process 2 is the process of switching control by the switching means 2, and the switching process 3 is the process of switching control by the switching means 3. .

  The fluid tank 11 is provided with a pressure reducing valve 6b, a pressurizing on-off valve 10, and a pressure gauge 36. Therefore, by operating the pressurizing on-off valve 10, compressed air from the air pressure source 9 of the dental medical unit 1 is provided. It is possible to pressurize the fluid in the fluid tank 11 and to send the fluid into the fluid circuit 29 in the dental care unit 1 with this applied pressure. The air pressure source 9 of the dental care unit 1 may be a pressurized air source for an external outlet attached to the dental care unit 1.

  The fluid tank 11 is filled with a disinfectant or drinking water (including natural water, natural mineral water, mineral water, bottled water, purified water, distilled water, etc.) as a cleaning liquid. In addition, the disinfectant mentioned here is capable of disinfecting biofilm bacteria adhering to the tube wall of the fluid circuit. For example, alcohols such as disinfectant ethanol and isopropanol, organic acids such as citric acid and acetic acid, water-soluble peroxides such as hydrogen peroxide, chlorates such as sodium hypochlorite, and sterilization without problems even if humans drink An extremely low-concentration disinfecting solution that is effective for the above, and others can be used singly or in combination. By the way, the above drinking water is stipulated in the “Guidelines for Labeling Quality of Mineral Waters (Drinking Water in Containers)” by the Ministry of Agriculture, Forestry and Fisheries. Moreover, you may use functional water, such as neutral electrolysis water and acidic electrolysis water, for the said washing | cleaning liquid. In this case, retention is not required depending on the type of functional water.

  The outline of the functional water will be described next. The functional water is said to be “the aqueous solution that has acquired a reproducible and useful function by artificial treatment and whose scientific basis has been clarified regarding the treatment and function”. (Refer to the "Oral Functional Water Guidelines" of the Japanese Society of Oral Functional Water) Neutral electrolyzed water is one of the functional waters obtained by electrolyzing tap water, has high bactericidal power, and is neutral. There is an advantage that no load is applied to the inside of the unit. Further, in the case of acidic electrolyzed water or alkaline electrolyzed water, it is possible to cope with the problem by making the fluid conduit material a fluid conduit that is not corroded by the acidic electrolyzed water or alkaline electrolyzed water.

  Next, as a fluid circuit cleaning method of this embodiment, a cleaning process by switching the three-way switching valve 12 shown in FIG. 2 will be described with reference to the time chart of FIG. Disinfection / cleaning of the fluid circuit of the present embodiment is performed according to the steps (S1) to (S8) shown in both figures, (S1) shows the medical condition, and the water supply circuit A side shows FIG. Is connected to the fluid circuit 29 side in the dental care unit 1 by switching the three-way switching valve 12 incorporated in the fluid circuit switching device 30 shown in FIG. Is prevented.

  Next, in the step (S2), the water supply source circuit A from the water pressure source 2 side and the fluid supply source circuit B from the fluid tank 11 side are once separated and cut off in a non-contact state by the fluid circuit switching device 30 (S3 ) As shown in the stroke, the three-way selector valve 12 is connected to the fluid supply source circuit B side, and the pressurized air is supplied from the fluid tank 11 connected to the fluid supply source circuit B by turning on the pressurization on-off valve 10 Then, the water remaining in the cup water supply and the fluid circuit 29 of each instrument is discharged. After the residual fluid is discharged, the pressurization on / off valve 10 is turned OFF and the supply of pressurized air from the fluid tank is stopped. As a result, the fluid circuit 29 returns to normal pressure.

  Next, the fluid tank 11 is manually removed from the fluid circuit switching device 30, the cleaning fluid is filled in the fluid tank 11, and the fluid circuit switching device 30 is mounted. Thereafter, the pressurization on / off valve 10 is turned ON (S4), as shown in the process, from the fluid tank 11 containing the cleaning liquid connected to the fluid supply source circuit B side into the fluid circuit 29 including the cup water supply and each instrument. Supplied and flushed. Further, the pressurization on / off valve 10 is turned off to allow the cleaning liquid to stay in the fluid circuit 29. (S5) In the process, the cleaning liquid is retained for a predetermined time, and the inside of the fluid circuit 29 including the cup water supply and each instrument is disinfected. Thereafter, in step (S6), the pressurization on / off valve 10 is turned ON, and pressurized air is supplied from the fluid tank 11 connected to the fluid supply circuit B side. At this time, since the cleaning liquid is empty, the fluid tank 11 can supply only pressurized air. The pressurized air discharges the fluid remaining in the cup water supply and the fluid circuit 29 of each instrument. After discharging, the pressure on / off valve 10 is turned off. In the step of retaining the cleaning liquid (S5) for a predetermined time, if the cleaning effect is recognized, the cleaning liquid may be simply passed and the retention may be omitted.

  Next, the fluid tank 11 is manually removed from the fluid circuit switching device 30, and the fluid tank 11 is filled with tap water and attached to the fluid circuit switching device 30. (S7) In the process, the pressurized on-off valve 10 is turned on and the tap water filled in the fluid tank 11 is supplied into the fluid circuit 29 including the cup water supply and each instrument, and the residual fluid that has not been separated by the pressurized air. Rinse away. Thereafter, the pressurization on-off valve 10 is turned off. Finally, in the step (S8), the water supply source circuit A side and the fluid supply source circuit B side are separated and cut off in a non-contact state by the fluid circuit switching device 30, and then the three-way switching valve 12 is connected to the tap water supply source circuit A. By connecting to the side, it returns to the medical condition which is the first (S1) process. This completes the cleaning of the fluid circuit 29.

  In the present embodiment, as an example, the pipeline system configured in the dental care unit 1 is connected to the water pressure source 2 and the tap water supply source circuit A as shown in FIG. A valve 3a, a filter 4a, a check valve 5, a water supply on / off valve 3b, a pressure reducing valve 6b, and a filter 4b are connected, and a valve-coupled joint male 7a is connected as a fluid circuit switching means. On the other hand, a fluid supply source circuit B is connected to the air pressure source 9, and a pressure reducing valve 6b and a pressure on / off valve 10 are connected in order toward the downstream side, and the tip branches in two directions. There is a bypass circuit 28 to which a check valve 5 is connected 13a, and a fluid tank 11, a solenoid valve 13b, and a check valve 5 are connected to the other side, and a valve-coupled joint male 7b is provided as a fluid circuit switching means on the other side. It is connected. In the present embodiment, a pressurized air bypass circuit 28 is provided in parallel to the fluid tank 11 via the electromagnetic valve 13a without using the fluid tank 11 as in the step (S6) of the first embodiment. In this example, pressurized air is supplied from the air pressure source 9. In addition, the process of filling the fluid tank 11 with tap water or cleaning liquid is performed manually, and the switching (opening and closing) of the tap water supply source circuit A side and the fluid supply source circuit B side in the other processes (S2) to (S7) Processes such as valve control, pressurization on-off valve control, and flushing are performed by automatic control by a program.

  The fluid in the connected pipe line is switched and controlled by a switching valve 19 that can be automatically actuated ahead, and a cup water supply 14 and a micro motor 15 that are placed ahead by opening and closing control of a plurality of solenoid valves 13, It is sent to handpieces such as a turbine 16, a scaler 17, and a three-way syringe 18. In addition, there is no contact between the hydraulic pressure source 2 side valved coupling male 7a and the valved coupling female 8a, and between the pneumatic pressure source 9 side valved coupling male 7b and the valved coupling female 8b. Thus, the fluid supply source and the water supply source from the fluid tank 11 can be shut off, and the fluid supply port to the fluid circuit 29 in the dental care unit 1 can be completely shut off.

  Accordingly, the fluid circuit switching means shuts off the water supply source circuit A and connects the fluid supply source circuit B from the fluid tank 11 to the fluid circuit 29 in the dental care unit 1 and the fluid tank. Switching means 2 for shutting off the fluid supply source circuit B from 11 and connecting the water supply source circuit A to the fluid circuit 29 in the dental care unit, and the fluid supply source circuit B and the water supply from the fluid tank 11 Each of the source circuits A is shut off, and the fluid supply port to the fluid circuit 29 in the dental care unit 1 is shut off, and the switching means 3 for bringing the three circuits into a non-contact state. Switching between the switching means 2 and the switching means 3 is controlled by the switching control means.

  Since the pressure reducing valve 6b, the pressurizing on-off valve 10, and the pressure gauge 36 are provided in the fluid tank 11, the fluid tank 11 is compressed with compressed air from the dental care unit 1 by operating the pressurizing on-off valve 10. It is possible to pressurize the internal fluid and to send the fluid to the fluid circuit 29 in the dental care unit 1 by this applied pressure. Since the fluid that can be filled in the fluid tank 11 is the same as that in the first embodiment, the description thereof is omitted.

Next, the cleaning process by switching the three-way switching valve 12 in FIG. 4 will be described according to the procedure from the process (S1) to the process (S8) shown in FIG. 2 with reference to the time chart in FIG.
(S1) The stroke indicates the medical condition, and the water supply source circuit A side is connected to the fluid circuit 29 side in the dental care unit 1 by switching the three-way switching valve 12 built in the fluid circuit switching device 30, and simultaneously supplies fluid. The source circuit B side is blocked to prevent the cleaning liquid from entering the fluid circuit 29.

  Next, in the process (S2), the tap water supply circuit A side and the fluid supply source circuit B side are separated and cut off in a non-contact state by the fluid circuit switching device 30, and then the three-way switching valve as shown in the process (S3) 12 is connected to the fluid supply circuit B side, the pressure on / off valve 10 is automatically turned on, the solenoid valve 13a is automatically turned on, and the pressurized air is fed into the cup water supply and the fluid circuit 29 of each instrument. The fluid remaining in the fluid circuit 29 is discharged. After discharging, the solenoid valve 13a is automatically turned OFF, and the supply of pressurized air stops.

  Next, as shown in the step (S4), the solenoid valve 13b is automatically turned ON, and the cleaning liquid is supplied from the fluid tank 11 filled with the cleaning liquid into the fluid circuit 29 including the cup water supply and each instrument. And flushed. Thereafter, the fluid circuit 29 is filled with the cleaning liquid. Further, the electromagnetic valve 13b and the pressurization on / off valve 10 are automatically turned off to stop the supply of pressurized air. As a result, the pressure decreases and the fluid circuit returns to normal pressure.

  Next, as shown in the step (S5), the cleaning liquid is retained in the fluid circuit 29 for a predetermined time, and the inside of the fluid circuit 29 including the cup water supply and each instrument is sterilized. Next, the fluid tank 11 is manually removed from the fluid circuit switching device 30, and the fluid tank 11 is filled with tap water and attached to the fluid circuit switching device 30. After that, as shown in the step (S6), the pressure on / off valve 10 is automatically turned on, and the solenoid valve 13a is automatically turned on to supply water to the fluid supply source circuit B side and pressurized air to the instrument. Then, the fluid staying in the fluid circuit 29 is discharged. Thereafter, the solenoid valve 13a is automatically turned off.

  Next, in step (S7), the solenoid valve 13b is automatically turned on, and the tap water in the fluid tank 11 connected to the fluid supply source circuit B side is supplied to the cup water supply and the instrument. Wash away residual fluid that could not be drained. Thereafter, the solenoid valve 13b and the pressurization on / off valve 10 are automatically turned off. Finally, in the process (S8), the tap water supply circuit A side and the fluid supply source circuit B side are separated and cut off in a non-contact state by the fluid circuit switching device 30 and then the three-way switching valve 12 is connected to the tap water supply source circuit. Connect to the A side. As a result, the process returns to the first (S1) process, and the cleaning of the fluid circuit 29 is completed.

  In the second embodiment, a bypass circuit 28 for pressurized air is provided in parallel to the fluid tank 11 via the solenoid valve 13a, so that the solenoid valve 13a is connected even if cleaning liquid or tap water remains in the fluid tank 11. As a result, the fluid staying in the fluid circuit 29 in the dental care unit 1 can be discharged.

  In this embodiment, as an example, the pipeline system configured in the dental care unit 1 is connected to the water pressure source 2 and the tap water supply source circuit A as shown in FIG. A valve 3a, a filter 4a, a check valve 5, a water supply on / off valve 3b, a pressure reducing valve 6a, and a filter 4b are connected, and a valve-coupled joint male 7a is connected as a fluid circuit switching means. On the other hand, a fluid supply source circuit B is connected to the air pressure source 9, and a pressure reducing valve 6b and a pressure on-off valve 10 are connected in order toward the downstream, and the tip of the pressure source 9 is divided into two directions, and one side is an electromagnetic valve. There is a bypass circuit 28 to which a check valve 5 is connected 13a, and a fluid tank 11 to which receptacles 20a and 20b are connected via open / close valves 3c and 3d, an electromagnetic valve 13b and a check valve 5 on the other side, respectively. Connected, a valved coupling joint male 7b is connected as a fluid circuit switching means. The fluid in the connected pipe line is switched and controlled by a switching valve 19 that can be automatically actuated ahead, and a cup water supply 14 and a micro motor 15 that are placed ahead by opening and closing control of a plurality of solenoid valves 13, It is sent to handpieces such as a turbine 16, a scaler 17, and a three-way syringe 18.

  In addition, the coupling joint male with valve 7a and the coupling joint female 8a with valve on the water pressure source 2 side, and the coupling joint male with valve 7b and the coupling joint female 8b with valve on the air pressure source 9 side are separated from each other so as not to contact each other. Thus, it is possible to shut off the fluid supply source and the water supply source from the fluid tank 11 and completely shut off the fluid supply port to the fluid circuit 29 in the dental care unit 1. Therefore, the switching of the fluid circuit shuts off the water supply source circuit and connects the fluid supply source circuit B from the fluid tank 11 to the fluid circuit 29 in the dental care unit 1 and the fluid tank 11. And the switching means 2 for connecting the water supply source to the fluid circuit 29 in the dental care unit 1 and the fluid supply source and the water supply source from the fluid tank 11 are shut off. And a switching means 3 for shutting off the fluid supply port to the fluid circuit 29 in the dental care unit 1 and bringing the three circuits into a non-contact state. The switching means 1, the switching means 2 and the switching means 3 respectively. The switching is controlled by switching control means.

  The fluid tank 11 is provided with a pressure reducing valve 6b, a pressurizing on-off valve 10, and a pressure gauge 36. Therefore, by operating the pressurizing on-off valve 10, the fluid tank is compressed with compressed air from the dental care unit 1. It is possible to pressurize the fluid in 11 and send the fluid to the fluid circuit 29 in the dental care unit 1 by this applied pressure. Since the fluid that can be filled in the fluid tank 11 is the same as that in the first embodiment, the description thereof is omitted.

  Next, a cleaning process by switching the three-way switching valve 12 shown in FIG. 5 will be described with reference to FIGS. The sterilization / cleaning of the fluid circuit in the present embodiment is performed by the steps (S1) to (S8) shown in FIG. 2 while referring to the time chart of FIG. The process of filling the receiving containers 20a and 20b with tap water and cleaning liquid is performed manually, and the other (S2) to (S7) processes are switched between the tap water supply circuit A side and the fluid supply source circuit B side. The processes such as on-off valve control, pressurization on-off valve control, and flushing are performed by automatic control by a program.

(S1) The process indicates the medical condition, and the tap water supply source circuit A side is connected to the fluid circuit side in the dental care unit 1 by switching the three-way switching valve 12 built in the fluid circuit switching device 30, and simultaneously supplies fluid. The source circuit B side is shut off to prevent the cleaning liquid from entering the fluid circuit 29.
Next, the receiving container 20a is manually filled with cleaning liquid and the receiving container 20b is manually filled with tap water. The receiving containers 20a and 20b are like buckets, and there is a drop between the receiving containers 20a and 20b and the fluid tank 11, and fluid is dropped into the fluid tank 11 and supplied by gravity. From the receiving containers 20a, 20b provided at the upper part to the fluid tank 11, the fluid tank 11 is connected by a conduit, and the fluid tank 11 is automatically controlled by the on-off valve 3c and the on-off valve 3d provided in the middle of the conduit. The system is designed to contain the necessary amount of tap water and cleaning liquid. Next, in the process (S2), the tap water supply source circuit A side and the fluid supply source circuit B side are separated and cut off in a non-contact state once by the fluid circuit switching device 30, and then the three-way switching as shown in (S3) process The valve 12 is connected to the fluid supply source circuit B side, and the on-off valve 3d is automatically turned on to fill the fluid tank 11 with the cleaning liquid from the receiving container 20a. After that, the on-off valve 3d is automatically turned off, and further, the pressurizing on-off valve 10 and the electromagnetic valve 13a are automatically turned on to supply pressurized air to the cup water supply and the fluid circuit 29 of each instrument. Drain the residual fluid in 29. After discharging, the solenoid valve 13a is automatically turned off.

  Next, as shown in the step (S4), the electromagnetic valve 13b is turned ON, and the cleaning liquid is supplied from the fluid tank 11 connected to the fluid supply circuit B side into the fluid circuit 29 including the cup water supply and each instrument. Supplied and flushed. Thereafter, the fluid circuit 29 is filled with the cleaning liquid, and the solenoid valve 13b and the pressurization on / off valve 10 are automatically turned off to stop the supply of pressurized air. As a result, the pressure decreases and the fluid circuit returns to normal pressure.

  Next, as shown in the process in (S5), the cleaning liquid is retained in the fluid circuit for a predetermined time, and the inside of the fluid circuit 29 including the cup water supply and each instrument is sterilized. Thereafter, the on-off valve 3c is automatically turned on to fill the fluid tank 11 with tap water from the receiving container 20b. Thereafter, the on-off valve 3c is automatically turned off. Thereafter, the pressurized air is supplied to the fluid supply source circuit B side by automatically turning on the pressurized on-off valve 10 and the electromagnetic valve 13a in the step (S6). As a result, the water remaining in the cup water supply and the fluid circuit of each instrument is discharged.

  Next, in the process (S7), the solenoid valve 13b is automatically turned ON, and the tap water filled in the fluid tank 11 connected to the fluid supply source circuit B side is supplied to the cup water supply and each instrument. The residual fluid in the fluid circuit 29 that could not be completely discharged by the pressurized air is washed away. Thereafter, the solenoid valve 13b and the pressurization on / off valve 10 are automatically turned off. Finally, in the process (S8), the tap water supply circuit A side and the fluid supply source circuit B side are separated and cut off in a non-contact state by the fluid circuit switching device 30 and then the three-way switching valve 12 is connected to the tap water supply source circuit. After connecting to the A side and returning to the first (S1) step, the cleaning of the fluid circuit 29 is completed.

  In this embodiment, the receiving container is divided into two parts 20a and 20b as shown in FIG. 5, and each is connected to the fluid tank 11. However, the present invention is not limited to this, and is shown in the dotted frame in FIG. A two-layer receiving container 24 may be used. Further, the receiving container is not limited to a bucket, but may be a type in which a liquid used for drip injection is packed.

  In Example 3, it is possible to automatically supply fluid to the fluid tank 11 by supplying tap water or cleaning liquid to a receiving container in advance and storing it. The fluid tank 11 is removed and refilled each time. Can be saved. Although the example using the bypass circuit 28 has been described, the bypass circuit 28 may not be provided.

  In the third embodiment, a drop is provided between the receiving container and the fluid tank, and the structure in which the fluid is dropped and supplied to the fluid tank 11 by gravity is shown. However, in the fourth embodiment, the pumps 22a and 22b are replaced with gravity. An example using the will be described. In addition, by using pumps 22a and 22b instead of the water supply on / off valves 3c and 3d, the same implementation as that of the third embodiment can be performed even if there is no drop between the receiving containers 20a and 20b and the fluid tank. By automatically controlling the operation time of the pumps 22a and 22b, the fluid tank 11 is filled with a necessary amount of tap water and cleaning liquid. The check valve 5 prevents back flow between the tap water and cleaning liquid receiving containers 20a and 20b. When the pipes from the pumps 22a and 22b are directly connected to the fluid tank 11 without joining, the check valve 5 is not necessary. Others are the same as those of the third embodiment, and the description thereof is omitted.

  As described above, the fluid circuit 29 of the dental care unit 1 of the first to fourth embodiments completely separates the tap water fluid circuit and the fluid tank 11 fluid circuit for supplying the disinfecting / cleaning cleaning liquid, and cross-connection. Therefore, there is no possibility that the cleaning liquid flows backward to the tap water side. In addition, since the fluid circuit is cleaned after the water pressure source is separated, there is no fear that the cleaning liquid will flow backward to the water supply side, and the cleaning can be performed safely.

In this embodiment, a fluid circuit switching device 30 used in the water circuit cleaning method of the dental care unit will be described.
FIG. 7 is a perspective view showing an external appearance of the fluid circuit switching device 30 of the present embodiment with the fluid tank 11 attached thereto. As shown in the figure, the fluid circuit switching device 30 is covered with a cover 34, and includes a slide mechanism operation unit 31, a three-way switching valve operation unit 41 on the front surface thereof, and a pair of coupling release buttons 32 on the left and right. A fluid tank 11 is connected to the lower surface of the fluid circuit switching device 30. The upper part of the fluid tank 11 has a pressurizing on-off valve 10 for pressurizing the inside of the fluid tank 11, a pressure gauge 36 indicating the pressure in the fluid tank 11, a pressure adjusting screw 37 for adjusting the pressure, A pressure reducing valve 6 for pressurizing the fluid is provided. The fluid circuit switching device 30 is provided in the vicinity of the medical unit 1, and the fluid tank 11 is configured to be detachable from the fluid circuit switching device 30.

  FIG. 8 is a perspective view showing a state in which the fluid circuit switching device 30 cover 34 in FIG. 7 is removed. In this embodiment, the tap water supply circuit A is tap water and the fluid supply circuit B is a cleaning liquid. As shown in the figure, the fluid circuit switching device 30 includes a slide mechanism 39 that moves to the left and right, and a slide mechanism operation unit 31 that manually operates the slide mechanism 39. As an example, the fluid circuit switching device 30 is connected to the tap water supply circuit A side with a valve. The joint male 7 is connected to the valve-equipped joint joint female 8 opposed thereto by one-touch connection means. This connection can be released by pressing the coupling release operation unit 40. In addition, after connecting the valved coupling joint male 7 and the valved coupling joint female 8, the three-way switching valve operation unit 41 is turned to the tap water supply source circuit A side to pass water to the tap water supply source circuit A side. Is possible. As a result, the three-way switching valve 12 is connected to the dental care unit 1 side, and the tap water from the tap water supply source circuit A is supplied to the dental care unit 1.

  In this way, the tap water supply source circuit A side is connected by the valve-coupled joints 7 and 8, and the three-way switching valve 12 is switched to the tap water supply source circuit A side, while the fluid supply source circuit B side is connected with the valve. The joint male 7 and the valve-equipped joint joint female 8 are separated from each other and separated. Thereby, the fluid supply source circuit B side and the fluid circuit are completely separated, and the fluid on the fluid supply source circuit B side cannot flow back to the A side.

  The fluid tank 11 connected to the fluid circuit switching device 30 is provided with a pressure reducing valve 6, a pressure adjusting screw 37, and a pressure gauge 36. It is possible to pressurize the fluid in the fluid tank 11 with the compressed air from the unit 1 and send the fluid to the fluid circuit in the dental care unit 1 with the pressure of the compressed air. Since the fluid that can be filled in the fluid tank 11 is the same as that in the first embodiment, the description thereof is omitted.

  9 (a), 9 (b), and 9 (c) are front views of the fluid circuit switching device 30. As shown in FIG. 9 (a), the slide mechanism 31 that slides in the horizontal direction is located at the center, and the coupling joint with valve Reference numeral 8 denotes a non-contact state in which the tap water supply source circuit A side and the fluid supply source circuit B side are separated and not connected to each other. In the figure, the tap water supply circuit A is tap water, and the fluid supply circuit B is a cleaning liquid.

  9B and 9C show the operation of the fluid circuit switching device 30. FIG. As shown in FIG. 9 (b), the slide mechanism operation unit 31 is manually operated to move the slide mechanism 31 to the tap water supply source circuit A side, and the tap joint 7 with valve and the valve on the tap water supply source circuit A side are attached. By connecting the coupling joint 8 and switching the three-way switching valve 12 to the tap water supply source circuit A side, water can be passed into the dental care unit 1. At the same time, the fluid supply source circuit B side indicates that the valve-coupled joint male 7 and the valve-coupled joint 8 are separated from each other and completely separated so that water cannot pass therethrough. When the connection is released from this state, the coupling joint male with valve 7 and the coupling joint female 8 with valve on the tap water supply source circuit A side can be separated by pressing the coupling release operation unit 40.

  Further, as shown in FIG. 9 (c), by manually operating the slide mechanism operation unit 31 and moving the slide mechanism 39 to the fluid supply source circuit B side, the valve-coupled joint 7 on the fluid supply source circuit B side and the valve At the same time, the joint 7 with valve and the joint 8 with valve on the tap water supply source circuit A side are separated and separated. As a result, the tap water supply source circuit A and the fluid circuit in the dental care unit 1 are interrupted, and the three-way switching valve 12 is switched to the fluid supply source circuit B side so that the fluid supply source circuit B is passed. The fluid on the side is supplied to the fluid circuit in the dental care unit 1.

  Further, a three-way conduit 46 with a check valve may be provided in place of the three-way switching valve 12 described above. Since the connection and disconnection methods are the same as described above, description thereof is omitted. In this case, the three-way conduit 46 with a check valve is not linked to the slide mechanism 39, and the switching operation becomes unnecessary by using the three-way conduit 46 with a check valve for switching the flow path. It is possible to pass water without using it.

  Next, a water flow operation by switching the three-way switching valve 12 will be described with reference to FIG. (S1) In the stroke, the tap water supply circuit A side is connected by operating the slide mechanism 39, and the fluid circuit 29 in the dental care unit 1 is switched by switching the three-way switching valve 12 to the tap water supply circuit A side. The fluid supply source circuit B side is shut off at the same time, and the fluid from the fluid supply source circuit B side is prevented from flowing back into the fluid circuit 29. (Switching means 2)

  Next, as shown in the step (S2), the operation of the slide mechanism 39 shuts off the tap water supply source circuit A side and the fluid supply source circuit B side. As a result, any of the fluids on the tap water supply source circuit A side and the fluid supply source circuit B side cannot be supplied to the fluid circuit 29 side. (Switching means 3)

Next, as shown in the step (S3), the fluid supply source circuit B side is connected by the operation of the slide mechanism 39 and the three-way switching valve 12 is switched to the fluid supply source circuit B side so that the fluid is supplied from the fluid supply source circuit B side. It becomes possible to supply fluid to the circuit 29 side, and at the same time, the tap water supply source circuit A side is shut off, and the fluid from the fluid supply source circuit B side is prevented from flowing back to the tap water supply source circuit A side. . (Switching means 1)
In addition, since the connection ends blocked in the switching means 1 to 3 are separated from each other, it is prevented that the connection ends are connected.

  In this embodiment, the switching of the fluid circuit is automatically controlled by a motor. As shown in FIGS. 11 (a), 11 (b), and 11 (c), a gear 42 is provided on the rotating shaft of the motor 48, and a rack 43 is provided on the upper and lower surfaces of the slide mechanism 39 so that the gear 42 and the rack 43 are engaged. This constitutes a rack and gear mechanism that converts rotational motion into linear motion. Further, a gear 42 is provided on the circumference of the three-way switching valve operation unit 41, meshed with a rack 43 provided on the lower surface of the slide mechanism 39, and a motor 48 provided on the upper part of the slide mechanism 39 is rotated. In conjunction with this rotation, the slide mechanism 39 is interlocked to the left and right.

  In other words, in the rack / gear mechanism, the slide mechanism 39 and the three-way switching valve 12 are interlocked to the left and right. For automatic control by the motor 48, connection and release are automatically performed. Therefore, a one-touch operation is not necessary. The motor 48 may be provided below the three-way switching valve operation unit 41. In the case of interlocking by electric drive, control may be made so as to notify by sound, light, display display or the like at the time of connection.

  FIG. 11B shows a state in which water is passed through the tap water supply source circuit A side when the motor 48 is provided on the upper portion of the slide mechanism 39. In this way, the three-way switching valve 12 is interlocked and controlled so that water flows correctly to the tap water supply source circuit A side. FIG. 11 (c) shows a state where water is passed to the fluid supply circuit B side.

In addition, in the above description, only the slide mechanism is interlocked, and only the three-way switching valve 12 may be manually operated.
Further, in FIG. 11, it is also possible to have a configuration in which only the slide mechanism is interlocked and only the three-way switching valve 12 is operated manually. Also in this case, as shown in the figure, a rack 43 is provided on the upper surface of the slide mechanism 39, and a motor 48 is provided on the upper portion of the slide mechanism, and the gear 42 provided on the rotating shaft of the motor 48 and the rack 43 are engaged. Thus, a rack / gear mechanism is formed, and the rotation motion is converted into a linear motion by the rotation of the motor 48. As a result, the slide mechanism 39 moves left and right in conjunction with the rotation of the motor 48. Further, because of automatic control by the motor 48, connection and release are performed automatically. Accordingly, the one-touch release operation is not necessary. Further, after the connection, the water can be passed by manually operating the three-way switching valve 12 in the direction of passing water.

  Further, a three-way conduit 46 with a check valve may be used instead of the three-way switching valve 12 described above. Since the connection and separation are the same as described above, the description thereof is omitted. Note that the three-way conduit 46 with a check valve is not linked to the slide mechanism 39, and does not require a switching operation for passing water.

  As described above, in the dental care unit 1 of the present invention described in the fifth and sixth embodiments, the example using the rack and gear mechanism in which the rack and the gear mesh as the mechanism for converting the rotational motion into the linear motion has been described. The present invention is not limited to this, and other conversion mechanisms can be used as long as the switching operation in the fluid circuit switching device 30 of the present invention is satisfied.

  As described above, the fluid circuit cleaning method and apparatus of the medical unit of the present invention completely separates the tap water fluid circuit and the fluid circuit of the fluid tank supplying the disinfecting / cleaning fluid to prevent cross connection. As a result, the disinfectant solution will not flow back to the tap water side. Also, since the fluid circuit is cleaned after the water pressure source is separated, there is no possibility that the disinfecting solution or the cleaning solution will flow back to the tap water side, and the cleaning can be performed safely.

  In the present embodiment, the example in which the present invention is applied to the fluid circuit of the dental medical unit has been described. However, the present invention is not limited to the dental medical unit, but includes a medical instrument having a medical instrument for treatment using water. It can be applied to all of the devices. For example, the present invention can be applied to a conduit cleaning device or a medical device used in otolaryngology, obstetrics and gynecology, urology, ophthalmology, and the like.

1 Dental unit
2 Water pressure source
3 Water supply on / off valve
4 Filter
5 Check valve
6 Pressure reducing valve
7 Male coupling joint with valve
8 Female joint with valve female
9 Air pressure source
10 Pressurized on / off valve
11 Fluid tank
12 Three-way selector valve
13 On-off valve
14 cups of water
15 Micro motor
16 Turbine
17 Scaler
18 Three-way syringe
19 Switching valve
20 Receiving container
29 Fluid circuit
30 Fluidic circuit switching device
31 Slide mechanism operation section
32 Coupling release button
34 Cover
36 Pressure gauge
37 Pressure adjusting screw
39 Slide mechanism
40 Coupling release operation section
41 Three-way selector valve operation section
42 Gear
43 racks
46 Three-way pipeline with check valve
48 motor

Claims (14)

Switch between the tap water supply source circuit A from the water pressure source side and the fluid supply source circuit B from the fluid tank side filled with the cleaning fluid, and supply either one of the fluids to the fluid circuit in the medical unit In fluid circuit switching,
After passing through the switching step 3 for separating the tap water supply source circuit A from the water pressure source side and the fluid supply source circuit B from the fluid tank side into a non-contact state once by the fluid circuit switching means, The switching means 2 connects the tap water supply source circuit A to the fluid circuit in the medical unit by the switching means, or the fluid supply source circuit B from the fluid tank side is connected to the fluid in the medical unit by the switching means. A fluid circuit cleaning method for a medical unit, wherein the fluid circuit in the medical unit is cleaned in a cleaning step including a switching step 1 connected to the circuit.   In the washing step, the switching step 2 is a step (S1) in which tap water from a water pressure source is supplied to a fluid circuit in the medical unit in a medical condition, and the switching step 1 is a fluid in the medical unit. The circuit is opened, the pressurized air filled in the fluid tank is supplied into the fluid circuit, the residual fluid in the fluid circuit is discharged, the supply of the pressurized air filled in the fluid tank is stopped, and the fluid is The step (S3) of returning to the normal pressure in the circuit, and the step (S2) of separating from the step (S1) to the non-contact state at the time of transition to the step (S3) is the switching step 3, and In step (S4), the cleaning liquid is supplied into the fluid circuit from the fluid tank filled with the cleaning solution, and in step (S5), the cleaning liquid is retained in the fluid circuit in the medical unit as necessary for the disinfection treatment. Open the fluid circuit as S6) The pressurized air filled in the fluid tank is supplied to the fluid circuit, the residual fluid in the fluid circuit is discharged, and the tap water is supplied to the fluid circuit from the fluid tank filled with tap water as a step (S7). And the step (S8) of separating the non-contact state at the time of the first step (S1) transition from the step (S7) is the switching step 3 The fluid circuit cleaning method for a medical unit according to claim 1.   3. A fluid circuit cleaning method for a medical unit according to claim 1, further comprising a bypass circuit for pressurized air that is branched upstream of the fluid tank and merges downstream of the fluid tank.   The fluid circuit cleaning method for a medical unit according to claim 2 or 3, wherein the cleaning step is performed automatically.   The fluid is stored in a receiving container for temporarily receiving the fluid, and then the water supply on-off valve is operated to drop the fluid into the fluid tank by gravity and fill it. A fluid circuit cleaning method for a medical unit according to Item.   5. The fluid tank according to claim 1, wherein the fluid tank is filled with fluid by operating a pump after the fluid is stored in a receiving container that temporarily receives the fluid. 6. Fluid circuit cleaning method for medical unit.   The fluid circuit cleaning method for a medical unit according to claim 1, 2, 5, or 6, wherein the fluid filled in the fluid tank is a cleaning liquid or drinking water.   The fluid tank is configured to supply the fluid filled in the fluid tank to the fluid circuit of the medical unit by pressurizing the inside thereof with pressurized air. 8. A fluid circuit cleaning method for a medical unit according to 6 or 7.   9. The fluid circuit cleaning method for a medical unit according to claim 8, wherein the pressurized air is supplied from a pressurized air source.   10. The fluid circuit cleaning method for a medical unit according to claim 9, wherein the pressurized air source is a pressurized air source from an external outlet attached to the medical unit. In a fluid circuit switching device that switches a circuit of a water supply source consisting of tap water and a fluid supply source from a fluid tank filled with fluid, and supplies one of the fluids to the fluid circuit in the medical unit.
A switching process for once separating the circuit of the water supply source on the tap water side and the fluid supply source on the fluid tank side into a non-contact state, and after passing through the switching process for separating, the one of the fluid circuits is placed in the medical unit. A fluid circuit switching device for a medical unit, comprising a fluid circuit switching means comprising a switching process for connecting to the fluid circuit.   The fluid circuit switching means shuts off the water supply source circuit and connects the fluid supply source circuit from the fluid tank to the fluid circuit in the medical unit; and the fluid supply from the fluid tank. And switching means 2 for connecting the water supply source to a fluid circuit in the medical unit, shutting off each of the fluid supply source and the water supply source from the fluid tank, and in the medical unit Switching means 3 for shutting off the fluid supply port to the fluid circuit and bringing the three circuits into a non-contact state, and for controlling the switching of the switching means 1, the switching means 2, and the switching means 3. The fluid circuit switching device for a medical unit according to claim 11, further comprising:   The fluid circuit switching device for a medical unit according to claim 12, wherein the fluid tank is configured to be detachable in the vicinity of the medical unit.   The fluid circuit switching device for a medical unit according to claim 12 or 13, wherein a receiving container for temporarily storing fluid and supplying the fluid to the fluid tank as needed is connected to the fluid tank.

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