JP7547144B2 - Cleaning device for water supply passage of dental unit, and dental unit equipped with same - Google Patents

Description

The present disclosure relates to a cleaning device for cleaning the water supply lines of a dental unit.

A dental unit is a unit in which various equipment used during dental treatment, etc. is provided, and includes a patient chair on which the patient sits. Around the dental unit, there is a doctor unit in which various instruments for dental treatment, such as handpieces, are arranged, an assistant unit, a water outlet that supplies mouthwash, etc. to the patient, a cuspidor for draining the water, and a dental light that illuminates the patient's mouth. The dental unit also includes a water supply channel that supplies water to the water outlet, handpieces, etc.

From a hygienic standpoint, it is preferable to clean the inside of the piping that constitutes the water supply line, and for this purpose, there are cleaning devices for water supply lines, such as those described in Patent Document 1.

This type of cleaning device is installed in parallel to the water supply line, and a valve operated by the operation of a control panel is switched so that cleaning liquid flows into the water supply line and fills the inside of the piping. When cleaning is completed, the valve operated by the operation of the control panel is switched so that water flows into the water supply line, rinsing and draining the cleaning liquid, and water can be supplied again to the water outlet and handpiece.

JP 2018-171277 A

Conventional cleaning equipment requires a lot of manual preparation and operation, which means there is a risk of errors in adjusting the cleaning solution or operating it, and cleaning is also time-consuming.

In view of the above problems, the present disclosure aims to provide a cleaning device for a dental unit that can prevent errors in adjusting the cleaning liquid and in operation, while reducing the amount of work required. It also provides a dental unit equipped with this cleaning device.

One aspect of the present disclosure is a cleaning device for cleaning a water supply line of a dental unit, comprising a cleaning liquid container for storing cleaning liquid, and a concentrate supply line for supplying concentrate to the cleaning liquid container before it is diluted with cleaning liquid, the concentrate supply line being provided with an intermediate container for storing a predetermined amount of concentrate supplied from a concentrate container in which concentrate is stored upstream of the cleaning liquid container, and the movement of the concentrate from the concentrate container to the intermediate container, and the movement of the concentrate from the intermediate container to the cleaning liquid container are performed by free fall .

Another aspect of the present disclosure is a dental unit that includes the above-described cleaning device, and in which cleaning fluid is supplied to the water supply channel by the cleaning device.

The cleaning device disclosed herein is equipped with a means for supplying the concentrate to the cleaning liquid container, which reduces the opportunities for manual dilution and operation, thereby preventing errors and reducing the amount of work required.

FIG. 1 is a perspective view of the appearance of a dental unit 1. FIG. FIG. 2 is a diagram illustrating the cleaning device 10.

The present disclosure will be described below based on the embodiments shown in the drawings. However, the present invention is not limited to these embodiments.

1. Configuration of the dental unit Fig. 1 is an external view of a dental unit 1 according to one embodiment, and Fig. 2 is a schematic diagram for explaining a cleaning device 10 according to one embodiment provided in the dental unit 1. As can be seen from Figs. 1 and 2, the dental unit 1 includes a base 2, a patient chair 3, a dental light 4, a doctor unit 5, an assistant unit 6, a water supply passage, an air passage, and the cleaning device 10.

1.1. Base The base 2 is disposed below the patient chair 3 and serves as the base of the patient chair 3. The base 2 has an outer shell formed by a housing, and various control devices are housed inside the housing. Examples of the control devices included here include a hydraulic circuit for raising and lowering, tilting and standing up the patient chair 3, and a hydraulic control means for controlling the hydraulic circuit. In addition, a foot switch is provided on the back side of the patient chair 3 of the base 2, and the practitioner can operate the foot switch or an operation switch on the operation panel 5d of the doctor unit 5 to issue a command to the hydraulic control means and control the hydraulic circuit to raise and lower, tilt and stand up the patient chair 3.

1.2 Patient Chair The patient chair 3, as is well known, is provided with a seat, a backrest, a headrest, a legrest, and a footrest, and is configured so that it can be raised and lowered and tilted and stood up as described above by the hydraulic circuit disposed in the base 2.

1.3 Dental lighting The dental lighting 4 is attached via an arm that can move and rotate freely using a universal joint or the like so that it can accurately illuminate the inside of the patient's oral cavity during treatment. Therefore, by adjusting the position and angle of the dental lighting 4, the practitioner can move the dental lighting 4 to a position where the practitioner can properly observe the inside of the patient's oral cavity.

1.4. Doctor Unit The doctor unit 5 is provided on the side of the patient chair 3 opposite to the assistant unit 6, and has a work table 5a equipped with various tools and switches required by the practitioner. The work table 5a has a work surface 5b on its upper surface, and a handpiece group 5c used by the practitioner during treatment is stored in a holder. Examples of handpieces included in the handpiece group 5c include an air turbine, a micromotor, a scaler, and a syringe. The work table 5a may be provided with an operation panel 5d on which various operation switches are arranged, and for example, it is possible to tilt and stand up the patient chair 3, perform lifting and lowering operations, turn on and off the dental light 4, and set the start and start of cleaning the water supply channel.
The work table 5a is supported by an arm 5e so as to be movable and rotatable, and the work table 5a can also be moved and rotated in accordance with the movements of the practitioner, thereby improving convenience.

1.5 Assistant Unit The assistant unit 6 is disposed on a side of the patient chair 3 opposite to the side where the doctor unit 5 is disposed, and includes an assistant hanger 7, a spitting receptacle 8, and a water outlet 9.

1.6 Assistant Hanger The assistant hanger 7 is a section that is equipped with tools mainly used by the assistant. The assistant hanger 7 includes a hanger section 7a and a hanger support 7b. Handpieces such as a vacuum, saliva ejector, and syringe are suspended from the hanger section 7a. The hanger section 7a is supported by the hanger support 7b so that it can move and rotate.

1.7. Cuspitodon The cuspidor 8 is used when a patient gargles and cleans his/her mouth with water supplied from the water outlet 9 during or after treatment. The cuspidor 8 is bowl-shaped to spit out water from the mouth after gargling. Saliva and water discharged into the cuspidor 8 are discharged through a drain trap in the water unit. The cuspidor 8 is rotatable within a horizontal plane toward the front of the patient. As a result, the cuspidor 8 can be positioned in front of the patient, improving convenience.

1.8. Water Outlet The water outlet 9 is a portion through which water flows out from a water supply source, and is used when a patient gargles to clean the inside of the mouth during or after treatment.

The water supply passage is a water supply passage that is made up of piping and various devices that supply water from a water supply source to the water outlet 9, handpiece, etc., as shown in Fig. 2. The various devices provided here include, for example, valves and regulators, and known devices can be used as necessary.

1.10. Air Path The air path is an air circuit consisting of piping and various devices that supply air from an air supply source to each handpiece, as partially shown in Figure 2. The various devices provided here include, for example, valves and regulators, and known devices can be used as necessary.

1.11. Cleaning Device The cleaning device 10 is a device for cleaning the inside of a pipe of a water supply line and for filling the water supply line with a cleaning liquid. The configuration of the cleaning device 10 is conceptually shown in FIG.
The cleaning device 10 has a cleaning liquid container 11 , an undiluted liquid supply path 20 , a liquid flow path 30 , and an air supply path 40 .

[Cleaning solution container]
The cleaning liquid container 11 is a container for storing a cleaning liquid (a liquid obtained by diluting an undiluted liquid with water to a predetermined concentration). A lid is disposed on the cleaning liquid container 11 so as to be able to seal the container, and piping is passed through the lid. Specifically, piping from the undiluted liquid supply path 20, the liquid flow path 30, and the air supply path 40 are passed through the container.
The capacity of the cleaning liquid container 11 is not particularly limited, but it is preferable that it be 1.5 times or more the internal volume of the water supply line to be cleaned.

The type of cleaning solution used is not particularly limited, but examples include hydrogen peroxide, hypochlorous acid, and surfactants.

[Concentrate supply path]
The stock solution supply path 20 is a flow path that supplies the stock solution, which is a composition of the cleaning solution before dilution, to the cleaning solution container 11. In this embodiment, the stock solution supply path 20 has a stock solution container 21, an intermediate container 22, an intermediate container front valve 23, an intermediate container rear valve 24, an intermediate container water level sensor 25, and a cleaning solution container water level sensor 26, which are connected by piping so that the stock solution flows. More details are as follows.

<Concentrate container>
The stock solution container 21 is a container that contains stock solution. The type of stock solution is determined by the cleaning solution to be used and is not limited. The stock solution container 21 usually contains enough stock solution for 30 to 90 cleaning operations.

<Intermediate container>
The intermediate container 22 is a container for storing a portion of the stock solution (preferably an amount of stock solution necessary for one to several cleanings) from the stock solution container 21 and for supplying the stored stock solution to the cleaning solution container. The specific shape of the container is not particularly limited, and a container of an appropriate capacity and material can be used. The capacity of the intermediate container 22 is not particularly limited, but it can be smaller than the stock solution container 21 from the viewpoint of space saving and cost. The specific capacity is not particularly limited, but it may be about 1/50 to 1/10 of the stock solution container.
Such an intermediate container 22 can improve the accuracy of the supply amount compared to directly supplying the stock solution from the stock solution container 21 to the cleaning liquid container 11. In addition, even if replacement of the stock solution container 21 is delayed after the stock solution in the stock solution container 21 runs out, an opportunity for cleaning with the stock solution stored in the intermediate container 22 can be ensured.

<Intermediate vessel front valve>
The intermediate container front valve 23 is a valve that switches between prohibiting and allowing the flow of concentrate from the concentrate container 21 to the intermediate container 22. The specific form of the intermediate container front valve 23 is not limited as long as it can switch between prohibiting and allowing the flow of concentrate, but it is preferable that it be a solenoid valve from the viewpoints of enabling automatic switching by electrical control and having a fast response speed.

<Intermediate vessel rear valve>
The intermediate container rear valve 24 is a valve that switches between prohibiting and allowing the flow of the concentrate from the intermediate container 22 to the cleaning liquid container 11. The specific form of the intermediate container rear valve 24 is not limited as long as it can switch between prohibiting and allowing the flow of the concentrate, but it is preferable that the intermediate container rear valve 24 be an electromagnetic valve from the viewpoints of automatic switching by electrical control and fast response speed.

<Intermediate vessel water level sensor>
The intermediate container water level sensor 25 is a sensor that detects the liquid level of the concentrate stored in the intermediate container 22. The specific embodiment of the sensor that detects the liquid level is not particularly limited, and any known sensor can be used.
The amount of the stock solution to be detected by the intermediate container water level sensor 25 can be determined as appropriate, for example, to be the amount of stock solution used for one to several cleanings. This allows a cleaning solution of an appropriate concentration to be automatically prepared in the cleaning solution container 11, as described below.

<Cleaning liquid container water level sensor>
The cleaning liquid container water level sensor 26 is a sensor that detects the liquid level of the cleaning liquid stored in the cleaning liquid container 11. The specific embodiment of the sensor that detects the liquid level is not particularly limited, and a known sensor can be used.
The amount of cleaning liquid to be detected by the cleaning liquid container level sensor 26 can be determined as appropriate, for example, the amount of cleaning liquid used for one or several cleanings. This allows a cleaning liquid of an appropriate concentration to be automatically prepared in the cleaning liquid container 11, as described below.

<Layout and piping of each component>
The above-mentioned components are arranged, for example, as follows.
To allow the concentrate to flow, the concentrate container 21 and the intermediate container front valve 23, the intermediate container front valve 23 and the intermediate container 22, the intermediate container 22 and the intermediate container rear valve 24, and the intermediate container rear valve 24 and the cleaning liquid container 11 are each connected by piping. Therefore, the concentrate in the concentrate container 21 flows from the upstream side to the downstream side of the concentrate through the concentrate container 21, the intermediate container front valve 23, the intermediate container 22, the intermediate container rear 24, and the cleaning liquid container 11 in that order.
In this embodiment, the concentrate is configured to fall freely by utilizing gravity, so that the concentrate reaches the cleaning liquid container 11 from the concentrate container 21. Therefore, in this embodiment, the concentrate supply path 20 is arranged in the order of the concentrate container 21, the intermediate container front valve 23, the intermediate container 22, the intermediate container rear valve 24, and the cleaning liquid container 11, from the highest to the lowest.

<Other form examples>
The above is an example of the mode in which the stock solution is moved by utilizing free fall. This allows the number of required devices to be reduced and the stock solution supply path to be constructed simply. However, this is not limited to this, and for example, the stock solution may be moved by a pump.
The above shows that the amount of concentrate in the intermediate container 22 is detected by the intermediate container water level sensor 25, and the amount of cleaning liquid in the cleaning liquid container 11 is detected by the cleaning liquid container water level sensor 26, but the amount of concentrate and the amount of cleaning liquid may also be detected using a flow meter, pressure gauge, weight meter, etc.
A sensor may also be provided in the stock solution container to notify when the remaining stock solution falls below a predetermined amount.Similarly, a sensor may be provided in the cleaning solution container 11 to notify when the remaining cleaning solution falls below a predetermined amount.

[Liquid flow path]
The liquid flow path 30 is a flow path that supplies water to be supplied to the cleaning liquid container 11 and the cleaning liquid prepared in the cleaning liquid container 11 to the water supply path. The cleaning liquid is prepared by diluting the stock solution with the water supplied from the liquid flow path 30 to the cleaning liquid container 11. The prepared cleaning liquid is supplied from the cleaning liquid container 11 through the liquid flow path 30 to the water supply path, which is the piping of the object to be cleaned.

As described above, the liquid flow path 30 is not particularly limited in its specific configuration, so long as it is configured so that the cleaning liquid is prepared by diluting the stock solution with water supplied from the liquid flow path 30 to the cleaning liquid container 11, and the prepared cleaning liquid is supplied from the cleaning liquid container 11 to the water supply path through the liquid flow path 30. In this embodiment, piping from the water supply source to the water supply path that is already equipped in the dental unit is used. This makes it possible to simplify the structure of the dental unit. For this reason, in this embodiment, the liquid flow path 30 is equipped with a liquid switching valve 31.

The liquid switching valve 31 is connected to piping from the water supply source, piping to the water supply unit 9 and the handpiece, and piping from the cleaning liquid container 11. This connection makes it possible to switch between a flow path connecting the water supply source and the water supply passage (a flow path used for normal treatment, etc.), a flow path connecting the water supply source and the cleaning liquid container 11 (a flow path that supplies water for dilution to the cleaning liquid container 11), and a flow path connecting the cleaning liquid container 11 and the water supply passage (a flow path that supplies cleaning liquid to the water supply passage that is to be cleaned).
The specific form of the liquid switching valve 31 is not limited as long as it can switch the flow of liquid in this manner, but it is preferable that it be an electromagnetic valve from the standpoint of being able to automatically switch by electrical control and having a fast response speed.

In other words, in this embodiment, the liquid flow path 30 is configured with a liquid switching valve 31 and piping connecting the liquid switching valve 31 to the cleaning liquid container 11.

In addition, in this embodiment, from the viewpoint of reducing the number of pipes and simplifying the device structure, a flow path from the water supply source provided in a normal dental unit to the water supply channel is used, and the piping is used both to supply water to the cleaning liquid container 11 and to supply the prepared cleaning liquid to the water supply channel. However, this is not limited to this, and a flow path may be provided in addition to the flow path provided in a normal dental unit, or the piping for supplying water to the cleaning liquid container 11 and the piping for supplying the prepared cleaning liquid to the water supply channel may be separate pipes.

[Air supply path]
The air supply path 40 is a flow path that supplies air to the cleaning liquid container 11. The air supplied from the air supply path 40 to the cleaning liquid container 11 increases the internal pressure of the cleaning liquid container 11, and the cleaning liquid stored in the cleaning liquid container 11 is pushed out and caused to flow into the liquid flow path 30.

The specific configuration of the air supply path 40 is not particularly limited as long as it is configured so that the air supplied from the air supply path 40 to the cleaning liquid container 11 increases the internal pressure of the cleaning liquid container 11, forcing the cleaning liquid stored in the cleaning liquid container 11 out and causing it to flow into the liquid flow path 30. In this embodiment, a flow path from the air supply source to the air path that is already equipped in the dental unit is used. This makes it possible to simplify the structure of the dental unit. For this reason, in this embodiment, the air supply path 40 is equipped with an air switching valve 41 and a regulator 42.

The air switching valve 41 is connected to a pipe from the air supply source, a pipe to a handpiece, etc., and a pipe to the cleaning liquid container 11 (in this embodiment, a regulator 42 is disposed midway). This connection makes it possible to switch between a flow path connecting the air supply source and the handpiece, etc. (a flow path used in normal treatment, etc.) and a flow path connecting the air supply source and the cleaning liquid container 11 (a flow path that supplies air to cause the cleaning liquid to flow out of the cleaning liquid container 11).
The specific form of the air switching valve 41 is not limited as long as it can switch the air flow in this manner, but it is preferable that the air switching valve 41 be an electromagnetic valve from the viewpoints of the ability to automatically switch by electrical control and the fast response speed.

Regulator 42 is a regulator that allows adjustment of the filling pressure of the cleaning liquid, and is intended to supply a fixed amount of cleaning liquid under constant time control when used in conjunction with air switching valve 41. Regulator 42 also includes a pressure gauge.

In other words, in this embodiment, the air supply path 40 is configured to include an air switching valve 41, a pipe connecting the air switching valve 41 and the regulator 42, and a pipe connecting the regulator 42 and the cleaning liquid container 11.

In addition, in this embodiment, from the viewpoint of reducing the number of pipes and simplifying the device structure, a flow path from the air supply source to the air passage that is provided in a normal dental unit is used. However, this is not limited to this, and a flow path may be provided in addition to the flow path from the air supply source to the air passage that is provided in a normal dental unit.

[Control Means]
It is preferable that the above-described cleaning of the water supply passage by the cleaning device 10 is performed automatically. For this purpose, the cleaning device 10 is provided with a control means (not shown). An example of the control means is a computer. That is, the control means issues commands to the intermediate container front valve 23, the intermediate container rear valve 24, the liquid switching valve 31, and the air switching valve 41 in response to an electrical signal based on the user's operation to start cleaning and/or a signal generated when a specified time is reached, and cleans the water supply passage with cleaning liquid. A specific cleaning flow will be described later.
To this end, the control means comprises, for example, an operator, a RAM, storage means, receiving means and output means.

The operator is composed of a so-called CPU (central operator) and is electrically connected to the intermediate container front valve 23, the intermediate container rear valve 24, the liquid switching valve 31, and the air switching valve 41, etc., and is a means capable of controlling these. The operator also executes various programs stored in storage means that function as a storage medium, etc., and performs calculations based on these programs as a means for generating various data and selecting data.

RAM is a component that functions as a working area for operators and a storage means for temporary data. RAM can be composed of SRAM, DRAM, flash memory, etc., and is similar to known RAM.

The storage means is a component that functions as a storage medium in which programs and data that are the basis for various calculations are stored. The storage means may also be capable of storing various intermediate and final results obtained by executing the programs.

In this embodiment, one of the programs stored in the storage means includes a program for operating each component and performing cleaning, as described below.

The receiving means is a component that has the function of receiving a signal indicating that a cleaning start operation has been performed or that a predetermined timing has been reached.

The output means is a component that has the function of appropriately outputting to the outside the information that should be output from among the obtained results, and in this embodiment, the intermediate container front valve 23, the intermediate container rear valve 24, the liquid switching valve 31, and the air switching valve 41 are electrically connected.

2. Cleaning In the dental unit 1 having the above-mentioned configuration, cleaning of the water supply passage is carried out, for example, as follows: Note that the following operations are carried out automatically by the control means, except for the operation to start cleaning.

When the cleaning start operation is performed or a predetermined time is reached, cleaning begins as follows: In this example, immediately before cleaning begins, the intermediate container 22 is empty, the intermediate container front valve 23 and the intermediate container rear valve 24 prohibit the flow of concentrate, the liquid switching valve 31 opens the flow path from the water supply source to the water supply line (allowing the flow of arrow A in Figure 2), and the air switching valve 41 opens the flow path from the air supply source to the air line (allowing the flow of arrow B in Figure 2).

When a cleaning start operation is performed or a predetermined time has elapsed, the intermediate container front valve 23 is opened and the concentrate flows from the concentrate container 21 to the intermediate container 22 (arrow C in FIG. 2). When the intermediate container water level sensor 25 of the intermediate container 22 detects that a predetermined amount of concentrate is stored in the intermediate container 22, the intermediate container front valve 23 is closed and the flow of concentrate from the concentrate container 21 to the intermediate container 22 is stopped. Here, this embodiment is configured so that the flow is stopped when the amount of concentrate used at one time is stored in the intermediate container 22. Also, in this embodiment, the concentrate flows by free fall from the concentrate container 21 to the intermediate container 22, so the structure is simple.

When the intermediate container front valve 23 is closed, the intermediate container rear valve 24 is opened and the concentrate flows from the intermediate container 22 to the cleaning liquid container 11 (arrow D in FIG. 2 ). The intermediate container rear valve 24 is closed when a predetermined time (a sufficient time for the concentrate to move from the intermediate container 22 to the cleaning liquid container 11) has elapsed.
In this embodiment, the undiluted liquid flows by free fall from the intermediate container 22 to the cleaning liquid container 11, so the structure is simple.

When the stock solution is supplied to the cleaning liquid container 11, the liquid switching valve 31 switches and water is supplied from the water supply source to the cleaning liquid container 11 (arrow E in FIG. 2). This supplies water to the cleaning liquid container 11, dilutes the stock solution, and prepares the cleaning liquid. When the cleaning liquid container water level sensor 26 detects that a predetermined amount of cleaning liquid has been stored in the cleaning liquid container 11, the liquid switching valve 31 switches so that the cleaning liquid container 11 communicates with the water supply path (however, at this point, the cleaning liquid does not flow out of the cleaning liquid container 11). This stops the flow of water from the water supply source to the cleaning liquid container 11. Here, this embodiment is configured so that the flow stops when an amount of water that dilutes the stock solution used at one time to an appropriate concentration is supplied to the cleaning liquid container 11.

When the supply of water to the cleaning liquid container 11 is stopped, the air switching valve 41 switches and air is supplied from the air supply source to the cleaning liquid container 11 (arrow F in Figure 2). This causes the internal pressure of the cleaning liquid container 11 to rise, and the cleaning liquid stored in the cleaning liquid container 11 is pushed out and flows into the piping of the liquid flow path 30, and the cleaning liquid flows through the liquid switching valve 31 to the water supply line (arrow G in Figure 2). This cleans the water supply line.

Then, the liquid switching valve 31 switches so that water flows from the water supply source to the water supply line (arrow A in Figure 2), and the water flows into the water supply line to rinse the water supply line.

Note that, although an example has been described in which the concentrate is supplied to the intermediate container 22 after the cleaning operation has started, it is also possible to configure the system so that the concentrate is already stored in the intermediate container 22 when the cleaning operation starts, the concentrate in the intermediate container 22 is used in this operation, and the concentrate supplied from the concentrate container 21 to the intermediate container 22 is used for the next cleaning.

3. Effects, etc. The cleaning device 10 and the dental unit 1 equipped with it described above can eliminate the need for a dental unit user to manually attach a cleaning solution that has been diluted to a specified concentration to the dental unit, which is usually done manually by the dental unit user. This can also prevent errors in the dilution concentration.
In addition, whereas in the past it was necessary to attach a diluted cleaning solution to the dental unit, with the dental unit 1 of the present disclosure, it is only necessary to place the undiluted solution in the dental unit, making it possible to reduce the frequency of work required on the dental unit.
Furthermore, if the concentrate is placed in the dental unit and configured to enable automatic cleaning, automatic cleaning can be performed periodically (for example, once a day) even when the dental unit is not in use due to an extended vacation.
Furthermore, if a sensor is provided in the cleaning liquid container 11 to notify when the amount of cleaning liquid falls below a predetermined level, operation without any cleaning liquid can be prevented.

Conventionally, the user had to replace the cleaning liquid container, which requires high airtightness in a sealed state, and therefore the user could not say that the workability was good from the viewpoint of the reliability of airtightness and ease of installation. In contrast, according to the present disclosure, the user can improve the workability by only replacing the concentrate container, which does not require high airtightness. In addition, if the concentrate container is configured to have a sensor that notifies the user when the concentrate falls below a predetermined amount, the user can easily know when to replace the concentrate container.
Due to this improved interchangeability, there is little impact on workability even if the entire cleaning device is placed integrally inside the assistant unit, so piping, etc. can be simplified compared to when at least part of the cleaning device is attached externally for the sake of workability, making it easier to maintain and reducing costs.

If the concentrate supply path 20 is configured so that the concentrate is supplied to the cleaning liquid container 11 by free fall, the device can be configured simply and its control becomes highly reliable.

REFERENCE SIGNS LIST 1 dental unit 10 cleaning device 11 cleaning liquid container 20 concentrate supply path 21 concentrate container 22 intermediate container 23 intermediate container front valve 24 intermediate container rear valve 30 liquid flow path 31 liquid switching valve 40 air supply path 41 air switching valve

Claims (2)

1. A cleaning device for cleaning a water supply line of a dental unit, comprising:
A cleaning liquid container for storing a cleaning liquid;
a stock solution supply path for supplying a stock solution before being diluted with the cleaning solution to the cleaning solution container ,
the raw liquid supply path is provided with an intermediate container for storing a predetermined amount of the raw liquid supplied from a raw liquid container in which the raw liquid is stored, on the upstream side of the cleaning liquid container;
The transfer of the concentrate from the concentrate container to the intermediate container and the transfer of the concentrate from the intermediate container to the cleaning liquid container are performed by free fall.
Cleaning equipment. A dental unit comprising the cleaning device according to claim 1 , wherein the cleaning device supplies cleaning fluid to a water supply line.

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