JPH027658B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dental central vacuum piping system that provides stable suction at all times.

BACKGROUND ART In dental medical facilities, cutting dust, water, saliva, etc. are suctioned out from the oral cavity during dental treatment, or cutting dust is suctioned off during dental technicians.

Conventionally, in order to carry out this suction removal, a central vacuum piping system, for example as shown in FIG. 1, has been provided. This central vacuum piping system includes a large-diameter vacuum main pipe 1 whose one end is sealed, and a gas-liquid separator 2 and an intake blower 3 connected to the other end of the vacuum main pipe 1. A plurality of branch pipes 4 . . . are further connected to each of the examination tables and the like. A solenoid valve 5 and a filter 6 are provided at the end of the branch pipe 4, and the open end of the branch pipe 4 is inserted into the patient's oral cavity to remove water, saliva, and dust from the oral cavity. A suction adapter 7 that sucks the air together with the air is connected via a suction hose 8. Water, saliva, dust, etc. sucked from the suction adapter 7 are filtered by a filter 6 at the tip of the branch pipe 4 to remove large foreign objects (approximately 1 mm or more), and then pass through the vacuum main pipe 1 together with air. It is transported to the gas-liquid separator 2. The gas-liquid separator 2 separates these into gas components such as air and liquid components such as water and saliva containing dust and the like. The gas component separated here is sucked and exhausted by the intake blower 3, and when a certain amount of the liquid component accumulates, it is discharged through the drain pipe 9.

By the way, in order to completely convey the suction material from the suction adapter 7 by air, it is usually necessary to set the air velocity inside the vacuum main pipe 1 to 20 m/sec or more.
The diameter of the vacuum main pipe 1 is set so that the above-mentioned wind speed can be obtained when all the branch pipes 4, that is, the suction adapters 7 are opened. Therefore, the suction adapter 7
When the number of openings is small (the number of ports used is small), the wind speed in the vacuum main pipe 1 becomes slow, and liquids such as water, saliva, and dust, and some solids are transported to the gas-liquid separator. By then, it has settled and adhered to the wall of the vacuum main pipe 1. Since the sludge-like residue made of water, saliva, dust, etc. adhering to the tube wall has a large friction with the tube wall, it has been difficult to remove it by suction.

Therefore, sludge-like residue remains inside the vacuum main pipe 1 for a long period of time, and if the residue is left unattended, it will gradually accumulate, reducing the effective diameter of the pipe. For this reason, the conventional central vacuum piping system has a problem in that the suction force decreases after being used for a while, making it impossible to obtain a stable suction force. Moreover, these sludge-like residues naturally contain various fungi, and while they remain in the vacuum main pipe 1, they decompose and produce a bad odor, which is undesirable from a hygienic standpoint. Furthermore, in the past, there was a lack of suction power,
When a bad odor occurred, the inside of Vacuum Main Pipe 1 was cleaned, but this had the inconvenience of having to ask a company to clean it.

This invention has been made in view of the above circumstances, and is a central vacuum for dentistry that does not allow water, saliva, dust, etc. to remain in the vacuum main pipe 1, and therefore provides stable suction and a hygienic central vacuum. Our goal is to provide piping systems.

The dental central vacuum piping system of the present invention will be described below with reference to the drawings.
In FIG. 2, parts that are the same as those in the conventional central vacuum piping system shown in FIG. 1 are denoted by the same reference numerals for the sake of simplicity, and their explanation will be omitted.

What is shown in FIG. 2 is the dental central vacuum piping system of the present invention. In this central vacuum piping system, a return pipe 1 is installed at the end of the vacuum main pipe 1, which was previously sealed.
0 is connected. Connected to the end of the return pipe 10 is a cleaning liquid supply tank 11 that stores a cleaning liquid for cleaning the inside of the vacuum main pipe 1 and can flow a predetermined amount into the vacuum main pipe 1 in short periods. . Furthermore, at the terminal of the return pipe 10,
Return pipe 10 that returns a large amount of air to the vacuum main pipe 1
An on-off valve 12 is provided which allows the flow to flow through the air. The operations of the on-off valve 12, the cleaning liquid supply tank 11, and the intake blower 3 can be performed centrally at one location by means of an operation panel 13.

It is desirable that the return pipe 10 has a relatively large diameter so that a large amount of air can flow into the vacuum main pipe 1 without resistance. In addition, the return pipe 10
It is preferable that the return pipe 10 is located at a higher position than the position where the vacuum main pipe 1 is installed so that the residue of the vacuum main pipe 1 does not flow into the pipe. In this embodiment, the return pipe 10 is once raised, further bent, and guided toward the end of the vacuum main pipe 2 to which the gas-liquid separator 2 is connected. Here, the return pipe 10 is guided to the installation location of the gas-liquid separator 2 by the on-off valve 12, the cleaning liquid supply tank 11, the gas-liquid separator 2, and the intake blower 3.
This is because it is convenient to maintain these devices if they are installed in the same location.

The on-off valve 12 must be able to flow a large amount of air into the vacuum main pipe 1 when opened and closed, and must be able to be sealed to keep the inside of the pipe airtight when closed.

The reason why the on-off valve 12 and the return pipe 10 must be able to pass a large amount of air is as follows. If the air flow inside the vacuum main pipe 1 is a turbulent flow that is complex and irregular both in time and space, the air flow speed will increase even at a position close to the pipe wall, so the air flow in the vacuum main pipe 1 will be Residues, especially water, are removed efficiently.
This is because in order to make the flow inside the pipe turbulent, it is necessary to flow the air at high speed, and for this purpose, a large amount of air must be supplied to the vacuum main pipe 1.

FIG. 3 shows an example of an on-off valve 12 suitable for use in this central vacuum piping system 1. This on-off valve 12 has a diaphragm 1
A valve body 15 provided integrally with the return pipe 1
A valve seat pipe 16 that is connected to 0 and also serves as a valve seat.
It opens and closes with respect to the valve seat portion 17 of the valve. The operation of this valve body 15 is performed by a solenoid valve 18. This solenoid valve 18 has a diaphragm chamber 19 provided on the back side of the diaphragm 14 and a valve seat pipe 1.
It is provided in the middle of a suction pipe 21 that connects an opening hole 20 made on the side surface of the holder 6. This on-off valve 1
The second operation is performed as follows. First, in order to open the on-off valve 12, the solenoid valve 18 is opened. When the solenoid valve 18 is opened, the air in the diaphragm chamber 19 is transferred to the intake blower 3 connected to the vacuum main pipe 1.
, and the pressure becomes lower than atmospheric pressure. On the other hand, since atmospheric pressure is applied to the surface of the diaphragm 14 opposite to the diaphragm chamber 19 as shown by the arrow in FIG. 3, the diaphragm 14 is pushed in the direction of the arrow and the valve body 15 and the valve seat portion 17, air flows into the vacuum main pipe 1 via the return pipe 10. Next, if the solenoid valve 18 is closed and the communication between the diaphragm chamber 19 and the opening hole 20 of the valve seat pipe 16 is interrupted, air will flow into the diaphragm chamber 19 through the small hole 22 made in the upper part of this chamber 19. A small amount flows in, and eventually the pressure inside the diaphragm chamber 19 becomes atmospheric pressure, and the diaphragm 14 is drawn toward the valve seat pipe 16 by the suction force of the intake blower 3, and the valve body 1
5 and the valve seat portion 17 are in close contact with each other, and the on-off valve 12 is in a closed state in which air does not flow therethrough.

Next, a cleaning liquid supply tank 11 provided near the on-off valve 12 supplies a predetermined amount of cleaning liquid to the vacuum main pipe 1 via the return pipe 10 at a predetermined time. Although it is preferable to supply the cleaning liquid as frequently as possible, it is inconvenient to frequently fill the tank with cleaning liquid, so a large amount of cleaning liquid can be stored and supplied to the vacuum main pipe 1 in predetermined amounts. is desirable. FIG. 4 shows a suitable example of the cleaning liquid supply tank 11, and the interior thereof is a storage tank 23 for storing the cleaning liquid. This storage tank 23 is divided into upper and lower parts by a partition 24, with the upper part serving as a main storage tank 25 for storing cleaning liquid for multiple times, and the lower part serving as a temporary storage tank 26 for storing cleaning liquid for one use.
A communication hole 27 is opened in the partition 24, so that the main storage tank 26 and the temporary storage tank 26 are communicated with each other. The temporary storage tank 26 and the return pipe 10 are communicated through an outflow pipe 28. Also,
A ventilation pipe 29 is provided in the temporary storage tank 26 so as to open at the upper surface of the main storage tank 25, so that the cleaning liquid can easily flow into and out of the temporary storage tank 26. The center of the opening surface 30 of the outflow pipe 28 on the temporary storage tank 26 side is vertically below the center of the communication hole 27 formed in the partition 24. A plug 31 is arranged between the communication hole 27 and the opening surface of the outflow pipe 28. This stopper 31 has a barrel shape whose upper and lower ends are reduced in diameter so as to fit into the opening surface 30 of the flow hole 27 and the outflow pipe 28, respectively, and its height is equal to that of the temporary storage tank 26. It is slightly lower than the height. This plug 31 is fixedly connected to a rod 32 with its central axis aligned. This rod 32 is provided so that its central axis overlaps with a line connecting the centers of the opening surface 30 of the flow hole 27 and the outflow pipe 28, and passes through the main storage tank 25 in the upper part of the main storage tank 25. It is connected to a solenoid 34 installed on the top surface of the top plate 33 at the top. Rod 3
The upper part of 2 is housed in an airtight chamber 35. The rod 32 of this airtight chamber 35 has a ring 36 fitted and fixed to the upper part, and this ring 36 and the rod 32 of the airtight chamber 35
A spring 37 is inserted between the top surface and the top surface. The spring 37 and the solenoid 34 move the plug 31 up and down. The state shown in FIG. 4 shows the state in which the stopper 31 is located at the bottom, and at this time, the flow hole 27 is open and the opening surface 30 of the outflow pipe 27 is closed. For this reason, the main storage tank 25
The cleaning liquid passes through the circulation hole 27 to the temporary storage tank 26.
However, the cleaning liquid in the temporary storage tank 26 does not flow into the return pipe 10 because the opening surface 30 is closed. When supplying cleaning liquid to the vacuum main pipe 1 via the return pipe 10, the solenoid 34
The stopper 31 is pulled upward by the screw, the flow hole 27 is closed, and the opening surface 30 of the outflow pipe 28 is opened. In this state, the cleaning liquid in the temporary storage tank 26 flows out to the return pipe 10 through the outflow pipe 28, but the main storage tank 25
The cleaning liquid cannot flow out into the temporary storage tank 24. In this manner, the cleaning liquid supply tank 11 is capable of supplying the cleaning liquid corresponding to the volume of the temporary storage tank 26 to the return pipe 10 multiple times.

Next, the operation of the dental central vacuum piping system configured as described above will be explained.

In this dental central vacuum piping system, when the solenoid valves 5 of one or more branch pipes 4 are opened and in use, the return pipe 1
The on-off valve 12 of No. 0 is closed, and the intake blower 3
The inside of the pipe is brought into an intake state by the operation. When all the solenoid valves 5 of the branch pipes 4 are closed,
The on-off valve 12 is opened for a predetermined time (by a timer). This operation is performed in response to electrical signals sent from each electromagnetic valve 5 to the operation panel. During this time, the intake blower 3 is kept in operation. Water, saliva, dust, etc. sucked from the suction adapter 7 by the air sucked from the on-off valve 12 continue to be transported toward the gas-liquid separator 2 even after the solenoid valve 5 of the branch pipe 4 is closed. It will be done. Also, this air removes the moisture inside the vacuum main pipe 1, so the inside of the main pipe 1 is always in a dry state.

At the end of the medical treatment period, a predetermined amount of cleaning fluid is supplied from the cleaning fluid supply tank 11 to the vacuum main pipe 1 via the return pipe 10. This cleaning liquid is for peeling off or dissolving the residue remaining in the vacuum main pipe 1 from the pipe wall, and the residue dispersed in the cleaning liquid is conveyed to the gas-liquid separator 2 together with the cleaning liquid and removed.

In this way, the central vacuum piping system of the present invention can supply cleaning liquid from the cleaning liquid supply tank 11 and air from the on-off valve 12 to the vacuum main pipe 1. Therefore, since the residue is transported by the air supplied from the on-off valve 12, the interior of the vacuum main pipe 1 can be kept in a dry state, and the amount of residue in the main pipe 1 is reduced. Also,
Since the cleaning liquid is supplied from the cleaning liquid supply tank 11,
Residues attached to the walls of the main pipe 1 that are difficult to be transported by air are peeled off by the cleaning liquid and transported to the gas-liquid separator 2 together with the cleaning liquid. Therefore,
Since the inside of the vacuum main pipe 1 is always kept clean, the dental central vacuum piping system of the present invention can always obtain a stable suction force, and does not generate any bad odor, making it sanitary.

Next, the central vacuum piping system of the present invention will be explained in detail by showing examples.

〔Example〕

In a dental clinic equipped with the conventional central vacuum piping system shown in Figure 1,
The conventional system includes a return pipe 10, an on-off valve 12,
A cleaning liquid supply tank 11 was added to form the central vacuum piping system of the present invention as shown in FIG. The terminal had four suction ports, the diameter of the main vacuum pipe 1 was φ40 mm, the diameter of the return pipe 10 was φ25 mm, and its length was 10 m, and the interval between the main vacuum pipe 1 and the return pipe 10 was 25 cm. . Open/close valve 12
The diaphragm valve shown in FIG. 3 was used for this purpose, and the structure shown in FIG. 4 was used for the cleaning liquid supply tank 11. The on-off valve 12 was opened for 60 seconds when the solenoid valves 5 of all the branch pipes 4 were closed during medical treatment hours, and the ventilation rate at that time was 1500/min.
In addition, the capacity of the temporary storage tank 26 of the cleaning liquid supply tank 11 was set to 1, and water was used as the cleaning liquid and was supplied to the vacuum main pipe 1 at a rate of 0.6/min. The cleaning liquid was supplied after the examination in the evening, and after the cleaning liquid had passed, the on-off valve 12 was opened for 2 minutes to allow air to flow.

A comparison was made using the central vacuum piping system of the present invention set as described above in the same manner as the conventional system.

With the conventional vacuum piping system, the suction power decreased significantly and a bad odor was generated after 3 months of use, so we had to ask a contractor to clean the vacuum main pipe 1, but with the vacuum piping system of the present invention, after 6 months of use. The suction power does not decrease even after using it for a while,
There was no bad odor.

In the above embodiment, the on-off valve 12 and the cleaning liquid supply tank 11 are provided in the vacuum main pipe 1 via the return pipe 10, but these may be provided directly at the end of the vacuum main pipe 1. In addition, the on-off valve 12
The cleaning liquid supply tank 11 is not limited to the one shown in FIGS. 3 and 4, but other systems may be used as long as they have similar effects. For example, the on-off valve 12 is a large electromagnetic A valve may also be used directly. Further, the cleaning liquid supply tank 11 may have a structure in which the flow hole 27 and the outflow pipe 28 shown in FIG. ing,
Flash valves that open and close depending on water pressure,
A tank-type cleaning liquid supply tank called a low tank and a high tank, which open the valve with a screw, and when the water in the tank finishes flowing out, the valve closes, tap water comes out, and the water is stored in the tank again up to a certain level. 11 may also be used. Furthermore, it is desirable to set the timing of opening the on-off valve 12 to supply air, the timing of supplying the cleaning liquid from the cleaning liquid supply tank 11, the amount, time, etc. of these, in accordance with the system usage status of each medical facility. .

As explained above, the dental central vacuum piping system of the present invention is equipped with a cleaning liquid supply tank and an on-off valve at the end of the conventionally sealed vacuum main pipe, so that cleaning inside the vacuum main pipe can be carried out at any time. Because this is done, the amount of residual water, saliva, dust, etc. in the vacuum main pipe is extremely reduced.
Therefore, it is a system suitable for equipment in dental medical facilities, which provides stable suction power over a long period of time, does not generate bad odor, and is hygienic.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a conventional dental central vacuum piping system, FIG. 2 is a schematic diagram of an embodiment of the dental central vacuum piping system of the present invention, and FIG. 3 is a diagram of the piping of the present invention. FIG. 4 is a sectional view showing one embodiment of the on-off valve suitable for use in the system, and FIG. 4 is a sectional view showing one embodiment of the cleaning liquid supply tank. 1... Vacuum main pipe, 2... Gas-liquid separator, 3
...Intake blower, 4... Branch pipe, 11... Cleaning liquid supply tank, 12... Open/close valve.

Claims (1)

[Claims] 1. In a dental central vacuum piping system in which a gas-liquid separator and an intake blower are connected to one end of a vacuum main pipe to which a branch pipe is connected, a cleaning liquid supply tank for flowing cleaning liquid into the vacuum main pipe; A central vacuum piping system for dentistry, characterized in that a vacuum main pipe is provided with an on-off valve that allows air to flow.