JP2018108351A - Automatic dry suction device for dental unit chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic dry suction device for a dental unit chair.SOLUTION: Cyclone centrifugal separation means 20 includes: a cyclone gas-liquid separator in which the upper end is connected to an air suction port of an air compressor 10, and the circumference of the upper end part is connected to a suction tip of a unit chair, and which includes a conical part 21a having a foreign matter exhaust port 23 at the lower end; a foreign matter storage 22 which includes an inflow port 24 connected to the foreign matter exhaust port of the cyclone gas-liquid separator at the upper end, and an exhaust port 25 at the lower end; a branch pipe 26, two ends of which are connected to the foreign matter exhaust port of the cyclone gas-liquid separator and the exhaust port of the foreign matter storage through three-way valves 27a and 27b respectively; and an exhaust pipe 28 for connecting a discharge port of the air compressor and the branch pipe.SELECTED DRAWING: Figure 1

Description

The present invention relates to a suction device that can apply a vacuum to a unit chair used during dental care and surgery to remove sewage mixed with saliva or blood pus from the oral cavity of a patient. Specifically, by using the suction force of the air compressor to apply a vacuum to the unit chair, the consumption of excess water generated by a typical wet (water-sealed) vacuum pump is completely eliminated. It can be eliminated, and foreign substances such as saliva and blood pus are completely separated from the inhaled sewage to ensure that the foreign substances do not flow into the vacuum pump and prevent damage to the vacuum pump and decrease in efficiency. The present invention relates to a fully automatic dry suction device for a dental unit chair.

In dentistry, unit chairs that are used to lie down and receive medical care or surgery are used for various tools necessary for dental treatment and surgery, such as handpieces, suction tips ( It is a very important dentistry product that is equipped with a combination of a suction tip), a spittoon and a washing water supply means, etc. to enable efficient treatment.

The suction device applies a vacuum to the suction chip of the unit chair, and the washing water in which foreign matter such as saliva, blood pus and tartar generated in the patient's oral cavity during dental treatment and surgery is injected into the oral cavity. It is a very important element that is indispensable for a unit chair, as it is a device that uses a suction chip to discharge together.

These suction devices generally employ a water ring vacuum pump because the inhaled material is liquid.

As is well known, a water-sealed vacuum pump has an impeller installed in a cylindrical cylinder so as to be eccentric, and a sealing water is added to the impeller so that the impeller rotates. In order to allow the fluid to be sucked and discharged according to the volume change of the space between the ring-shaped water curtain formed on the inner wall of the cylinder and the eccentric impeller, an appropriate water sealing amount is required for smooth and efficient operation. Supply is very important.

However, foreign matter such as saliva and blood pus that are inhaled from the patient's oral cavity through the suction tip and cleaning water flow into the cylinder of the water-sealed vacuum pump, which only reduces the efficiency of the vacuum pump. In addition, when used for a long time, foreign substances such as saliva and dental plaque may accumulate on the impeller and cause overload, which may cause damage to the motor of the vacuum pump.

Therefore, it is necessary to discharge the contaminated seal water in the cylinder while frequently supplying the seal water to the cylinder of the vacuum pump even during operation of the apparatus. In addition, the amount of sealed water is increased, and it is very difficult to maintain an appropriate amount of sealed water, which is a cause of reducing the efficiency of the vacuum pump.

In particular, the sealed water that is discharged is a serious problem that pollutes the water quality by inducing a foul odor because it contains a large amount of foreign material such as saliva, blood pus, and calculus that has flowed in from the patient's mouth. Is also included.

Korean Registered Patent No. 10-134139 includes a sewage tank in which sewage sucked by a suction nozzle is stored, and its upper end is connected to a first suction part of a water-sealed vacuum pump. In order to constitute a closed circuit with the suction part and the discharge part, it is equipped with a sealed water tank having an exhaust part at each upper end to separate and discharge only the sewage and prevent the sealed water from being polluted. A dental suction device that is reusable is disclosed.

However, this technology has the following fatal problems.

First, the wastewater stored in the sewage tank is exhausted because the inside is a vacuum, so the device must be stopped and discharged by the sensor signal. There is also a risk of inhibiting efficient treatment.

Second, although there is a filter to prevent the inflow of foreign matter at the inlet of the second suction pipe connecting the sewage tank and the vacuum pump, fine particles such as tartar and cuttings are applied under a considerable vacuum pressure. It is difficult to reliably filter the foreign matter in the state, and it is necessary to frequently replace or clean the filter.

Third, the water in the sealed water tank is recirculated to the vacuum pump to reduce the amount of sealed water.However, due to the characteristics of the water-sealed vacuum pump, the water temperature rises greatly when operating for a certain period of time. When the cavitation phenomenon occurs, fatal damage is caused to the impeller and the like, and it is practically impossible to reuse the sealed water without a separate cooling means.

KR1030130100921 A * KR101179875 B1 KR200466513 Y1 KR101170295 B1 * References cited by the examiner

The present invention has been developed to solve the above-described conventional problems. Purely clean air that completely eliminates the consumption of excess water associated with the operation of the suction device during dental treatment and completely separates sewage mixed with saliva and blood pus from the patient's oral cavity. It is an object of the present invention to provide a fully automatic dry-type suction device for a dental unit chair that can minimize damage to the vacuum pump and a reduction in efficiency due to foreign substances by allowing only the gas to flow into the vacuum pump.

Another object of the present invention is that the foreign matter separated from the air can be automatically and easily discharged without stopping the suction device, and fully automatic for dental unit chair that can minimize water contamination. It is to provide a dry suction device.

In order to achieve such an object, a first invention of a fully automatic dry suction device for a dental unit chair according to the present invention comprises an air compressor having an air inlet and an outlet; the upper end is connected to the inlet of the air compressor, A cyclone centrifuge for separating and removing sewage containing foreign matter inhaled from the patient's mouth from the air, the periphery of the upper end being connected to the suction tip of the unit chair; However, a cyclone gas-liquid separator that is connected to the air suction port of the air compressor at the upper end, is connected to the suction tip of the unit chair around the upper end, and has a conical portion having a foreign matter discharge port at the lower end. A foreign matter storage unit having an inlet connected to the foreign matter outlet of the cyclone gas-liquid separator at the upper end and having an outlet at the lower end; It is characterized in that the foreign matter discharge port of the cron gas-liquid separator and the discharge port of the foreign matter storage are provided with a branch pipe connected to both ends via a three-way valve, an exhaust pipe connecting the discharge port of the air compressor and the branch pipe, respectively. And

Delete

The second invention of the fully automatic dry suction device for dental unit chair according to the present invention for achieving the above object is an air compressor having an air suction port and a discharge port; the upper end is connected to the suction port of the air compressor. And a cyclone centrifuge that separates and removes sewage containing foreign matter inhaled from the patient's oral cavity, the periphery of the upper end being connected to the suction tip of the unit chair, and a cyclone centrifuge. The separation means includes first and second cyclone gas-liquid separators each having a conical portion having a foreign substance discharge port formed at the lower end portion, the upper end portion of the first cyclone gas-liquid separator, and the suction chip of the unit chair. A first suction pipe that connects the first suction pipe, the inlet is connected to the first suction pipe via a third three-way valve, and the outlet is the upper end of the second cyclone gas-liquid separator. A second suction pipe connected around, a first intake pipe connecting the upper end of the first cyclone gas-liquid separator and the air suction port of the air compressor, and an inlet connected to the upper end of the second cyclone gas-liquid separator A second intake pipe whose outlet is connected to the first exhaust pipe via a fourth three-way valve, and a vacuum breaker for selectively breaking the vacuum of the first and second cyclone gas-liquid separators It is characterized by providing.

Here, the vacuum breaker is connected to the first suction pipe so that one end is located behind the third three-way valve, and the vacuum breaker and the vacuum breaker are connected to the second intake pipe at the other end. And is configured as a fifth three-way valve that selectively connects one of the first and second cyclone gas-liquid separators to the atmosphere.

Further, the vacuum breaker means is connected to the first suction pipe so that one end is located behind the third three-way valve, and the other end is connected to the second exhaust pipe, and one end is an air compressor. There is also an exhaust pipe configuration in which the other end is connected to the vacuum breaker pipe via a sixth three-way valve.

Similarly, each cyclone gas-liquid separator is provided with second and third level sensors that detect and send out the level of foreign matter, and the role change timing of the first and second cyclone gas-liquid separators To decide.

In the fully automatic dry suction device for dental unit chair according to the present invention, the sewage mixed with saliva or blood pus, etc. inhaled from the patient's mouth can be completely separated from the air by the cyclone centrifuge, so that it is purely clean. Only air can be allowed to flow into the air compressor, thereby minimizing damage to the vacuum pump and reduced efficiency due to the inflow of foreign matter.

In particular, the present invention uses a suction force of an air compressor to apply a vacuum to the unit chair, so that, unlike a general water-sealed vacuum pump, the consumption of water is completely eliminated and the maximum vacuum is achieved. Efficiency can be obtained. Further, unlike the conventional case, since there is no discharge of contaminated sealed water, the concern about water pollution can be minimized.

In addition, the present invention applies a three-way valve to a single-type centrifuge to discharge foreign matter separated from air discharged from an air compressor, and applies a three-way valve to a double-type centrifuge. Since the foreign matter is discharged through the vacuum breaker while checking the connection with the vacuum pump, unlike the conventional case, the separated foreign matter can be automatically and easily discharged without stopping the suction device.

Therefore, the present invention improves the reliability, safety, and ease of use of the dental unit chair, and has an excellent effect that greatly contributes to cost reduction.

FIG. 1 is a system diagram schematically illustrating a first invention of a fully automatic dry suction device for a dental unit chair according to the present invention, and FIG. 2 is a second invention of a fully automatic dry suction device for a dental unit chair according to the present invention. FIG. 3 is a system diagram schematically showing a system according to the present invention. FIG. 3 is a system diagram schematically showing another embodiment of the fully automatic dry suction device for dental unit chairs according to the present invention.

Specific features and other advantages of the fully automatic dry suction device for a dental unit chair according to the present invention will be apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

In FIG. 1, the first invention of the fully automatic dry suction device for a dental unit chair according to the present invention basically includes an air compressor (10) and foreign matters such as saliva and blood pus inhaled from a patient's mouth. It includes a cyclone centrifugal separation means (20) for separating and removing sewage from the air.

A known reciprocating compressor can be used as the air compressor (10), and it has an air suction port (11) and a discharge port (12) through which compressed air is discharged to the outside. These reciprocating air compressors (10) generate about 700 Torr, which is close to a complete vacuum, on the suction side of the structure, so that the vacuum required for dental practice is applied to the unit chair. It is enough.

The cyclone centrifugal separation means (20) includes a cyclone gas-liquid separator (21) that separates foreign substance-containing sewage inhaled from the oral cavity of a patient from air, and a foreign substance-containing sewage separated from the cyclone gas-liquid separator (21). Is provided with a foreign matter storage (22).

The cyclone gas-liquid separator (21) is formed in a cylindrical shape having a conical shape (21a) at the lower end, and has a foreign matter discharge port (23) at the center of the lower end of the conical shape (21a). The periphery of the upper end of the cyclone gas-liquid separator (21) is connected to a suction tip (not shown) of the unit chair via an intake pipe (30), and the intake pipe (40) is connected to the upper end via an intake pipe (40). Connected to the air inlet (12) of the air compressor (10).

The foreign matter storage (22) has an inlet (24) at the upper end, is connected to the foreign matter outlet (23) of the cyclone gas-liquid separator (21), and has an outlet (25) at the bottom. The discharge port (25) of the foreign matter storage (22) is connected to a discharge pipe (50) for discharging the separated foreign matter to the outside.

In order to selectively change the course of the compressed air discharged from the air compressor (10), the foreign matter discharge port (23) of the cyclone gas-liquid separator (21) and the discharge port (25) of the foreign matter storage (22). Both ends of the branch pipe (26) are connected through first and second three-way valves (27a) and (27b), respectively. For this reason, the branch pipe (26) is connected to the discharge port (12) and the exhaust pipe (28) of the air compressor (10).

As an ideal form, in the cyclone gas-liquid separator (21), the level of the separated foreign matter-containing sewage is detected, and the signal is sent to a control unit (not shown), so that the first and second A level sensor (29) for operating the three-way valves (27a) and (27b) in a predetermined foreign matter discharge mode is provided.

On the other hand, although not shown separately, the discharge pipe (50) connected to the discharge port (25) of the foreign matter storage (22) and discharging foreign matter to the outside is a sterilization means for sterilizing the separated foreign matter. For example, it is more desirable to be connected to an ozone generator or the like.

Such a suction device of the present invention should be connected in circuit with a control unit (not shown) having a built-in control circuit such as a microcomputer that can logically control the operation of each component described above. It is automatically controlled based on the signal from the control unit.

Next, the operation of the first invention of the fully automatic dry suction device for dental unit chair according to the present invention having such structural features will be described.

When the device is activated for treatment, the air compressor (10) is driven and a vacuum is created. As a result, sewage containing foreign matter such as saliva, blood pus, and calculus from the patient's oral cavity through the suction tip of the unit chair passes along the suction pipe (30) and the upper end of the cyclone gas-liquid separator (21). Inhaled. The sucked sewage is completely separated from the cyclone gas-liquid separator (21) by a fluid containing air and dust at a vacuum speed, and the foreign matter is stored in the lower part of the cyclone gas-liquid separator (21), so that pure clean air Only flows into the air compressor (10) along the intake pipe (40).

Therefore, the possibility that the inside of the air compressor (10) is contaminated with saliva or the like is surely prevented, efficient operation is possible, and the life of the apparatus can be extended by minimizing damage caused by foreign matter.

At this time, the compressed air discharged from the discharge port (12) of the air compressor (10) blocks the upper end of the branch pipe (26) connected to the foreign matter discharge port (23) of the cyclone gas-liquid separator (21). In this state, the exhaust pipe (28) passes through the lower end of the branch pipe (26) to the exhaust pipe (50).

The sewage containing saliva, blood pus, etc. separated from the air is stored in the foreign matter storage (22) until the level sensor (29) provided in the cyclone gas-liquid separator (21) detects the full state of the foreign matter. When the level sensor (29) detects and sends the signal to the control unit, the first three-way valve (27a) of the cyclone gas-liquid separator (21) is sent by the control unit signal. The foreign matter discharge port (23) is blocked, and the second three-way valve (27b) opens the discharge port (25) of the foreign matter storage (22) to communicate with the discharge pipe (50).

Then, the lower end of the branch pipe (26) is closed and the upper end thereof is connected to the inlet (24) of the foreign matter storage (22), so that the compressed air of the air compressor (10) is passed through the exhaust pipe (28). It will flow into the upper end of (22). Thus, unlike the conventional case, the cyclone gas-liquid separator (21) is in a vacuum state without stopping the suction device, and the foreign matter in the foreign matter storage (22) is discharged from the air compressor (10). It can be forced to exhaust automatically using air.

FIG. 2 shows an embodiment of the second invention of a fully automatic dry suction device for a dental unit chair according to the present invention.

In this embodiment, the other configuration of the cyclone centrifuge is applied in the configuration of the first invention described above, and the remaining configuration except for this is substantially the same, so that only the different portions are for convenience. I will explain.

In FIG. 2, the cyclone centrifuge (60) is different from the first invention described above in that two cyclone gas-liquid separators (61) and (62) are installed to alternately separate and store foreign substances. In practice, it includes vacuum breaking means for selectively breaking the vacuum of each cyclone gas-liquid separator (61) (62).

Each cyclone gas-liquid separator (61) (62) is formed with a conical portion (61a) (62a) at the lower end, and a foreign matter discharge port (63) (64) at the conical portion (61a) (62a). Respectively. These foreign matter discharge ports (63) and (64) are respectively provided with first and second check valves (73) and (74), and are connected to the discharge pipe (50).

Around the upper end of the first cyclone gas-liquid separator (61) is connected to a suction tip (not shown) of the unit chair via a first suction pipe (65), so that a second cyclone gas-liquid separator is provided. The second suction pipe (66) is connected to the first suction pipe (65) through the third three-way valve (67). Is connected to the suction tip.

The upper end of the first cyclone gas-liquid separator (61) is connected to the air intake port (11) of the air compressor (10) via the first intake pipe (68), so that the second cyclone gas-liquid separator is connected. The upper end of (62) is air intake port (11) of air compressor (10) by a second intake pipe (69) connected to first intake pipe (68) via a fourth three-way valve (70). Concatenated with

The vacuum breaking means is a vacuum in which one end is connected to the first suction pipe (65) and the other end is connected to the second suction pipe (69) so as to be located behind the third three-way valve (67). A breaker tube (71) and a fifth three-way valve (72) which is installed in the vacuum breaker tube (71) and selectively connects the first and second cyclone gas-liquid separators (61) and (62) to the atmosphere. ).

In this case, unlike the above-described first invention, the exhaust pipe (28a) provided in the discharge port (11) of the air compressor (10) can be present as it is exposed to the atmosphere, but the foreign matter is exposed to the outside. A foreign substance can be reliably discharged | emitted by the structure connected to the discharge pipe | tube (50) to discharge | emit and discharging naturally by gravity.

On the other hand, in the first and second cyclone gas-liquid separators (61) and (62), second and third level sensors (for detecting the level of the separated foreign matter and sending it to the control unit) 75) (76) are preferably provided.

The cyclone centrifuging means (60) of the second invention of the fully automatic dry suction device for a dental unit chair according to the present invention having such structural features is first constructed by a third three-way valve (67) by means of a second suction pipe. (66) is closed at the same time, the second three-way valve (70) closes the second suction pipe (69), and the vacuum by the air compressor (10) is connected to the first cyclone gas-liquid separator (61). And applied to the suction tip via the first suction pipe (65). At this time, the fifth three-way valve (72) causes the first cyclone gas-liquid separator (61) to shut off from the atmosphere, and connects the second cyclone gas-liquid separator (62) to the atmosphere. And the 1st check valve (73) with which the foreign material discharge port (63) of the 1st cyclone gas-liquid separator (61) was closed will be in the closed state.

As a result, sewage containing saliva or the like inhaled from the patient's oral cavity flows into the first cyclone gas-liquid separator (61) via the first suction pipe (65), and air and dust are separated by the vacuum speed. After completely separated, the liquid foreign matter containing saliva etc. is dropped and stored at the bottom of the first cyclone gas-liquid separator (61), and only pure clean air passes through the first intake pipe (68). To flow into the air compressor (10).

When liquid foreign substances are stored up to a certain level in the first cyclone gas-liquid separator (61) by such operation, the second level sensor (75) detects this and sends it to the controller. . Accordingly, the third three-way valve (67) connects the first suction pipe (65) to the second suction pipe (66) by the signal of the control unit, and the suction tip is connected to the second cyclone gas-liquid separator (62). And the fourth three-way valve (70) connects the second intake pipe (69) to the first intake pipe (68), thereby applying a vacuum to the second cyclone gas-liquid separator (62). It becomes like this.

Then, the liquid foreign substance inhaled from the oral cavity of the patient flows into the second cyclone gas-liquid separator (62), and is completely separated from the air by the vacuum speed and stored.

At the same time, the fifth three-way valve (72) disconnects the second cyclone gas-liquid separator (62) from the atmosphere, and connects the first cyclone gas-liquid separator (61) to the atmosphere to perform the first check. A valve (73) opens the foreign matter outlet (63) of the first cyclone gas-liquid separator (61). As a result, the concentrated foreign matter stored in the first cyclone gas-liquid separator (61) is discharged through the discharge pipe (50) by atmospheric pressure.

When the operation is continued in such a state and the foreign matter stored in the second cyclone gas-liquid separator (62) is full, the second level sensor (76) detects this and sends it to the control unit, Accordingly, a vacuum is again formed in the first cyclone gas-liquid separator (61) by a signal from the control unit, and foreign substances stored by the action of the atmosphere are discharged into the second cyclone gas-liquid separator (62). (50) to be discharged.

In the second invention, similarly to the first invention, the separated and stored foreign matter can be easily and automatically discharged even in a vacuum state without interrupting the operation of the suction device. it can.

On the other hand, FIG. 3 shows an embodiment of the second invention of the fully automatic dry suction device for dental unit chair according to the present invention.

In this embodiment, in the configuration of the second invention described above, the vacuum breaker is connected to the first suction pipe (65) so that one end is located behind the third three-way valve (67). One end of the vacuum breaker pipe (71) is connected to the second intake pipe (69), one end is connected to the discharge port (12) of the air compressor (10), and the other end is connected to the vacuum breaker pipe (71). And an exhaust pipe (28b) connected through a sixth three-way valve (77).

The embodiment of such a configuration is an embodiment of the second invention described above, and an air compressor (instead of the atmosphere) is used to break the vacuum of the first or second cyclone gas-liquid separator (61) (62). 10) Since the compressed air discharged from 10) has the same effect as that used, repeated explanation is omitted for convenience.

DESCRIPTION OF SYMBOLS 10: Air compressor 11: Air inlet 12: Discharge port 20: Cyclone centrifuge 21: Cyclone gas-liquid separator 22: Foreign material storage 23: Foreign material discharge port 24: Inlet 25: Discharge port 26: Branch pipe 27a, 27b : First and second three-way valves 28, 28a, 28b: Exhaust pipe 29: Level sensor 30: Intake pipe 40: Intake pipe 50: Exhaust pipe 60: Cyclone centrifuge means 61, 62: First and second cyclones Gas-liquid separators 65 and 66: First and second suction pipes 67: Third three-way valves 68 and 69: First and second suction pipes 70: Fourth three-way valves 71: Vacuum break pipes 72: Second 5 three-way valves 73, 74: first and second check valves 75, 76: second and third level sensors 77: sixth three-way valves

Selection diagram

FIG.

Is a system diagram schematically illustrating a first invention of a fully automatic dry suction device for a dental unit chair according to the present invention, Is a system diagram schematically illustrating a second invention of a fully automatic dry suction device for a dental unit chair according to the present invention, These are the system diagrams which show schematically the other Example of the fully automatic dry-type suction device for dental unit chairs 2nd invention by this invention.

Claims (7)

As a fully automatic dry suction device that applies vacuum to the suction tip of a dental unit chair, an air compressor having an air suction port and a discharge port; the upper end is connected to the air suction port of the air compressor, and the periphery of the upper end is the above A cyclone centrifuge that separates and removes sewage containing foreign matter inhaled from the patient's oral cavity, connected to the suction tip of the unit chair; A cyclone gas-liquid separator having a conical portion having a periphery around the upper end portion connected to the suction tip of the unit chair and having a foreign substance discharge port at the lower end, and the cyclone gas-liquid separator A foreign matter storage unit having an inlet connected to the foreign matter discharge port at the upper end and a discharge port at the lower end; A bifurcated pipe connected at both ends to the foreign substance outlet of the cyclone gas-liquid separator and the outlet of the foreign substance storage via a three-way valve, an exhaust pipe connecting the outlet pipe of the air compressor and the branch pipe are provided. A fully automatic dry suction device for dental unit chairs. Delete 2. The fully automatic dry suction apparatus for a dental unit chair according to claim 1, wherein the cyclone gas-liquid separator is provided with a level sensor for detecting the level of foreign matter. As a fully automatic dry suction device that applies vacuum to the suction tip of a dental unit chair, an air compressor having an air suction port and a discharge port; the upper end is connected to the air suction port of the air compressor, and the periphery of the upper end is the above A cyclone centrifuge that is connected to the suction tip of the unit chair and separates and removes sewage containing foreign matter inhaled from the oral cavity of the patient from the air, and the cyclone centrifuge is disposed at the lower end. First and second cyclone gas-liquid separators each having a conical portion formed with a foreign matter discharge port, and a periphery of the upper end portion of the first cyclone gas-liquid separator and a suction chip of the unit chair are connected to each other. One suction pipe and an inlet are connected to the first suction pipe via a third three-way valve, and an outlet is the second cyclone gas-liquid A second suction pipe connected to the periphery of the upper end portion of the separator, a first intake pipe connecting the upper end of the first cyclone gas-liquid separator and the air suction port of the air compressor, and an inlet connected to the second suction pipe. A second intake pipe connected to the upper end of the first cyclone gas-liquid separator and having an outlet connected to the first intake pipe via a fourth three-way valve; and the first and second cyclone gas-liquid separators A fully automatic dry suction device for a dental unit chair, comprising vacuum breaking means for selectively breaking the vacuum of the dental unit chair. 5. The fully automatic dry suction for a dental unit chair according to claim 4, wherein said first and second cyclone gas-liquid separators are provided with second and third level sensors for detecting the level of each foreign substance. apparatus. 6. The vacuum breaker according to claim 4 or 5, wherein one end of the vacuum breaker is connected to the first suction so that one end thereof is located behind the third three-way valve, and the other end is connected to the second intake pipe. A dental unit comprising a vacuum breaker tube and a fifth three-way valve that is installed in the vacuum breaker tube and selectively connects one of the first and second cyclone gas-liquid separators to the atmosphere Fully automatic dry suction device for chairs. 6. The vacuum breaker according to claim 4 or 5, wherein one end of the vacuum breaker is connected to the first suction pipe so that one end is located behind the third three-way valve, and the other end is connected to the second intake pipe. Installed in the vacuum breaker tube and the vacuum breaker tube, and is configured by a fifth three-way valve that selectively connects one of the first and second cyclone gas-liquid separators to the atmosphere. A fully automatic dry suction device for dental unit chairs.

Images