KR102153797B1 - Dental spittoon and method for controlling the same - Google Patents

Abstract

The present invention relates to a dental cuspidor and a control method thereof. Dental cuspidor of the present invention, the container portion; A liquid storage unit formed at the bottom of the container unit; A liquid discharge port connected to a lower end of the liquid storage unit to discharge the liquid stored in the liquid storage unit downward; An opening and closing part for opening and blocking the liquid discharge port; A driving unit for operating the opening and closing unit; A liquid information acquisition unit that detects whether the stored liquid level is equal to or greater than a first reference value; And a control unit for controlling the driving unit so that the opening/closing unit opens the liquid discharge port when the liquid level is greater than or equal to the first reference value, but allows a part of the stored liquid to remain in the liquid storage unit.

Description

Dental spittoon and method for controlling the same}

The present invention relates to a dental cuspidor and a control method thereof.

The unit chair is an equipment for accommodating a examinee in a dentistry, etc., and generally includes a headrest for supporting the examinee's head, a backrest for supporting the back, and a legrest for supporting the hips and legs. In general, the examinee is treated while lying on the unit chair. In addition, it may further include a treatment table on which a dental treatment tool such as a handpiece is mounted, a dental cuspidor for spitting washing water after the examinee has washed acupuncture or oral cavity.

The dental cuspidor has a container (bowl) formed on the top to accommodate the washing water spit out by the examinee. There is a hole in the lower part of the container to allow liquid such as washing water to flow out. The hole is covered with a cover, and a strainer is formed under the cover, so that solid particles generated after a dental procedure such as a handpiece are filtered out in many cases.

However, the dental cuspidor included in the existing dental unit chair does not have a device to block the odor from the spilled liquid as described above, so when used for a long time, the odor from the blood, saliva, or chemicals spit out by the patient occurs. do.

This phenomenon of odor flow can be partially solved by providing a trap space in which liquid collects in a drain pipe such as an S trap. However, in order to form such a trap, the piping structure inside the cuspidor becomes complicated, and a problem of increasing the volume may occur. In addition, problems such as decay of the liquid inside the trap and cleaning problems may occur.

In addition, another problem that may occur in the existing cuspidor is that the sewage itself flows back from the drain pipe and rises to the container. This reverse flow of sewage cannot be solved through the trap structure. Korean Patent Publication No. 10-1706279, which is a prior art, contains this problem as it is.

Accordingly, there is a need to provide a hygiene means capable of providing convenience to the examinee and the medical staff by efficiently preventing the odor of the dental cuspidor and backflow of sewage.

The present invention has been devised in view of the above problems, and an object of the present invention is to provide a dental cuspidor capable of blocking odors flowing out of a drain pipe.

In addition, another object of the present invention is to provide a dental cuspidor for preventing backflow of sewage from a drain pipe.

In addition, another object of the present invention is to provide a high-functional dental cuspidor capable of adjusting the liquid level in the liquid storage unit according to the needs of the user while maintaining a simple piping structure.

The dental cuspidor of the present invention for achieving the above object comprises: a container; A liquid storage unit formed at the bottom of the container unit; A liquid discharge port connected to a lower end of the liquid storage unit to discharge the liquid stored in the liquid storage unit downward; An opening and closing part for opening and blocking the liquid discharge port; A driving unit for operating the opening and closing unit; A liquid information acquisition unit that detects whether the stored liquid level is equal to or greater than a first reference value; And a control unit for controlling the driving unit so that when the liquid level is equal to or higher than the first reference value, the opening/closing unit opens the liquid discharge port but leaves a part of the stored liquid in the liquid storage unit.

In addition, when the liquid level is restored to less than the first reference value and a first time has elapsed, the control unit may control the driving unit so that the opening/closing unit blocks the liquid discharge port.

In addition, when the second time elapses after the liquid discharge port is opened and the liquid level is still higher than the first reference value, the control unit determines that the wastewater flows back through the liquid discharge port, and the opening/closing unit The driving unit may be controlled to block the signal and an alarm may be output visually or audibly.

In addition, the liquid information acquisition unit includes a first liquid level detection sensor and a second liquid level detection sensor formed below the first liquid level detection sensor, and the control unit includes the first liquid level detection sensor having the liquid level equal to or greater than a first reference value. When it detects that, the opening and closing unit opens the liquid outlet until the second liquid level detection sensor detects that the liquid level is restored to less than a second reference value less than the first reference value, and the stored liquid in the liquid storage unit It is preferable to control the driving part so as to leave a part of it.

On the other hand, the opening and closing portion, one end is hinged to the upper end of the liquid outlet valve; A rod that transmits the power applied from the driving unit to the valve and tilts the valve downward to open a liquid outlet at all times; And a spring returning the valve to its original position when the application of the power is released.

In addition, it is preferable that the opening/closing unit includes a stopper detachable from the inlet of the liquid discharge port and a power transmission member for transmitting power generated by the driving unit to the stopper, and the driving unit includes any one of an electric motor and an electromagnet. .

Meanwhile, the liquid information acquisition unit is preferably formed on an outer surface of an outer wall of the liquid storage unit to be vertically moved for level adjustment of the first reference value.

In addition, it is preferable that the liquid information acquisition unit includes a non-contact liquid level detection sensor, and at least a part of the outer wall is formed of a non-metallic material so that the non-contact liquid level detection sensor can detect the liquid level.

In addition, it is preferable that the liquid information acquisition unit includes an IR sensor, and at least a portion of the outer wall is formed of a transparent material so that the IR sensor can detect the liquid level.

The container part according to an embodiment of the present invention for achieving the above object, a liquid storage part formed at the bottom of the container part, a liquid discharge port connected to the lower end of the liquid storage part to discharge the liquid stored in the liquid storage part downward , A liquid control method for a dental cuspidor including an opening/closing unit for opening and blocking the liquid discharge port and a driving unit for operating the opening/closing unit, the method comprising: detecting whether a liquid level in the liquid storage unit is equal to or higher than a first reference value; And when the liquid level is greater than or equal to the first reference value, controlling the driving unit so that the opening/closing unit opens the liquid discharge port but leaves a part of the stored liquid in the liquid storage unit.

And, when the liquid level is restored to less than the first reference value and a first time has elapsed, the step of controlling the driving unit so that the opening and closing unit blocks the liquid discharge port.

In addition, when a second time elapses after the liquid discharge port is opened and the liquid level is still higher than the first reference value, it is determined that the wastewater flows back through the liquid discharge port, and the opening/closing part blocks the liquid discharge port. It is preferable to further include; controlling the driving unit and outputting an alarm visually or audibly.

According to various embodiments of the present disclosure, it is possible to effectively block odors flowing out of the drain pipe of the dental cuspidor.

Further, according to various embodiments of the present disclosure, it is possible to prevent backflow of sewage from the drain pipe.

In addition, according to various embodiments of the present disclosure, it is possible to provide a high-functional dental cuspidor capable of adjusting the liquid level in the liquid storage unit according to the needs of the user while maintaining a simple piping structure.

1 is a schematic diagram showing the configuration of a dental unit chair.
2 is a view showing the configuration of a conventional dental cuspidor.
3 is a schematic diagram showing the configuration of a dental cuspidor according to an embodiment of the present invention.
4 is a view showing the configuration of a dental cuspidor according to an embodiment of the present invention.
5 is a view showing the configuration of a dental cuspidor according to an embodiment of the present invention.
6 is a view showing the configuration of a dental cuspidor according to an embodiment of the present invention.
7 is a view showing the configuration of a dental cuspidor according to an embodiment of the present invention.
8 is a flowchart illustrating a method of controlling a dental cuspidor according to an embodiment of the present invention.
9 is a flowchart illustrating a method of controlling a dental cuspidor according to an embodiment of the present invention.
10 is a flowchart illustrating a method of controlling a dental cuspidor according to an embodiment of the present invention.

The following content merely illustrates the principles of the present invention. Therefore, those skilled in the art can implement the principles of the present invention and invent various devices included in the concept and scope of the present invention, although not clearly described or illustrated herein. In addition, all conditional terms and examples listed in this specification are, in principle, intended to be clearly intended only for the purpose of making the concept of the present invention understood, and should be understood as not limiting to the embodiments and states specifically listed as described above. do.

In addition, it is to be understood that all detailed descriptions listing specific embodiments as well as principles, aspects and embodiments of the present invention are intended to include structural and functional equivalents of these matters. It should also be understood that these equivalents include not only currently known equivalents, but also equivalents to be developed in the future, that is, all devices invented to perform the same function regardless of structure.

Thus, for example, the flowcharts herein are to be understood as representing a conceptual perspective of exemplary circuits embodying the principles of the invention. Similarly, all flowcharts, state transition diagrams, pseudocodes, etc. are understood to represent various processes performed by a computer or processor, whether or not the computer or processor is clearly depicted and that can be represented substantially in a computer-readable medium. Should be.

The functions of the various elements shown in the figures, including a processor or functional block represented by a similar concept, may be provided by the use of dedicated hardware as well as hardware having the ability to execute software in association with appropriate software. When provided by a processor, the function may be provided by a single dedicated processor, a single shared processor, or a plurality of individual processors, some of which may be shared.

In addition, the explicit use of terms presented as processor, control, or similar concepts should not be interpreted exclusively by referring to hardware capable of executing software, and without limitation, digital signal processor (DSP) hardware, ROM for storing software. It should be understood to implicitly include (ROM), RAM, and non-volatile memory. Other commonly used hardware may also be included.

In the claims of this specification, components expressed as means for performing the functions described in the detailed description include all types of software including, for example, a combination of circuit elements or firmware/microcode that perform the above functions. It is intended to include all methods of performing a function to perform, and is combined with appropriate circuitry for executing the software to perform the function. Since the invention defined by these claims is combined with the functions provided by the various enumerated means and combined with the manner required by the claims, any means capable of providing the above functions are equivalent to those conceived from this specification. It should be understood as.

The above-described objects, features, and advantages will become more apparent through the following detailed description in connection with the accompanying drawings, whereby those of ordinary skill in the technical field to which the present invention pertains can easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram showing the configuration of a dental unit chair. As shown in Fig. 1, the dental unit chair includes a chair 16 for accommodating the examinee, a table 17 for mounting treatment tools such as handpieces, scalers, and treatment charts, and a cleaning that is spit out by the examinee. It includes a dental cuspidor 10 for receiving and discharging the needle or needle. In addition, it may further include a light 19 for illuminating the oral cavity of the examinee, a water dispenser 15 for supplying washing water, and a monitor 18 for displaying X-ray images or medical records.

2 is a view showing the configuration of a conventional dental cuspidor. As shown in Fig. 2, the conventional dental cuspidor 10 includes a container 11 for accommodating a liquid such as saliva or washing water spit out by the examinee, a socket 12 coupled to the lower end of the container, and a cover (13), it is formed at the bottom of the cover 13, is configured to include a strainer 14 to filter out foreign matter.

As can be seen from FIG. 2, since the liquid flowing down from the container 11 is immediately drained in the dental cuspidor 10 of the conventional technology, there is no space in the drain pipe where the liquid can accumulate. Therefore, the smell of saliva, blood, or drugs may rise from the drain pipe and cause discomfort.

In addition, the sewage itself flows back from the drain pipe and may rise to the container 11. This can lead to serious hygiene problems.

3 is a schematic diagram showing the configuration of a dental cuspidor according to an embodiment of the present invention. As shown in FIG. 3, the dental cuspidor 100 according to an embodiment of the present invention includes a container part 200, a liquid storage part 300, a liquid outlet 400, an opening/closing part 500, a driving part It may include 600 and a control unit 800.

4 is a view showing the configuration of a dental cuspidor according to an embodiment of the present invention. As shown in FIG. 4, the container part 200 may take a shape of a bowl of a hemisphere or similar shape to accommodate the washing water spit out by the examinee.

A liquid storage part 300 may be formed at the lower end of the container part 200. The liquid storage unit 300 may be manufactured in a socket shape and assembled in the container part 200 or may be integrally formed with the container part 200. A space in which the liquid 320 can be stored is formed with an outer wall.

The hole leading from the lower end of the container part 200 to the liquid storage part 300 is covered by the cover part 900 and a sieve 910 is formed in the lower part of the cover, which occurs after dental procedures such as handpieces. It is desirable to filter out the solid particles.

The liquid discharge port 400 is connected to the liquid storage unit 300. The liquid discharge port 400 is in the form of a pipe assembled in the liquid storage unit 300 or integrally formed with the liquid storage unit 300, and transfers the liquid 320 flowing through the liquid storage unit 300 to the outside. Let it flow.

The opening and closing part 500 may open and block the liquid discharge port 400. While the liquid discharge port 400 is open, the liquid 320 may be discharged to the outside through the liquid discharge port 400. However, while the liquid discharge port 400 is blocked, the liquid 320 is blocked from being discharged to the outside through the liquid discharge port 400.

The driving unit 600 operates the opening and closing unit 500.

The operation may be any one or more of the operations of opening and blocking the liquid discharge port 400.

The liquid information acquisition unit 700 may detect whether a liquid level of the liquid 320 in the liquid storage unit 300 is equal to or greater than a first reference value. The first reference value is preferably set to an appropriate level so that the liquid 320 does not accumulate in the liquid storage unit 300 for an excessively long time while effectively blocking the reverse flow of odor.

In an embodiment of the present invention, it is preferable to allow the first reference value to be set by a user. The method of this setting is possible by electronic input through a commercial user interface or by adjusting the physical position of the liquid information acquisition unit 700.

The control unit 800 controls the driving unit 600 so that the opening/closing unit 500 opens the liquid discharge port 400 when the liquid level is greater than or equal to the first reference value.

In an embodiment of the present invention, the control unit 800 includes a microcomputer (not shown) with a calculation function, a memory (not shown) in which a computer program coded with a calculation process is stored, and an output of a signal generated as a result of the calculation. It may be implemented as an electronic circuit including a signal output unit (not shown) in charge.

In addition, the driving unit 500 refers to an actuator that generates and transmits power. The actuator may mean an electric motor or a combination of the electric motor and a gear assembly, but is not limited thereto.

When it is sensed that the liquid level of the liquid 320 is equal to or higher than the first reference value, the opening/closing unit 500 is operated to discharge the liquid 320 and make it a state capable of accommodating a new liquid 320. desirable.

In addition, the control unit 800 controls the driving unit 600 so that the opening and closing unit 500 blocks the liquid discharge port 400 when the liquid level is restored to less than the first reference value and a first time has elapsed. can do.

When it is sensed that the liquid level has been restored to less than the first reference value, blocking the liquid discharge port 400 after a certain time (first time) means that the liquid 320 is not completely discharged and a certain amount of the liquid storage unit By allowing it to remain in the 300, it plays a role of continuously preventing the odor backflow phenomenon.

The first time can be prevented from completely flowing out of the liquid 320, but is preferably designed at an appropriate time interval to prevent excessively frequent opening and closing operations.

In addition, when a second time elapses after the liquid discharge port 400 is opened and the liquid level is still higher than the first reference value, the driving unit 600 so that the opening/closing unit 500 blocks the liquid discharge port 400. It is desirable to control.

The fact that the liquid level does not fall below the first reference value even after a certain period of time has elapsed after the liquid discharge port 400 is opened may be a criterion for determining that sewage is flowing backward through the liquid discharge port 400. In this case, it is urgent to block the liquid discharge port 400 to prevent reverse flow of sewage.

In addition, in an embodiment of the present invention, it is preferable to display an alarm to the user through a visual or audible means in addition to the sewage backflow prevention function.

In addition, as shown in FIG. 4, the liquid information acquisition unit according to an embodiment of the present invention includes a first liquid level detection sensor 710 and a second liquid level detection sensor formed below the first liquid level detection sensor 710 ( 720) may be included. "Bottom" may mean a direction closer to the floor surface on which the dental cuspidor 100 is installed.

By installing the two liquid level detection sensors 710 and 720 up and down as described above, it is possible to detect two liquid levels.

When the first liquid level detection sensor 710 detects that the liquid level is greater than or equal to a first reference value, the second liquid level detection sensor 720 determines that the liquid level is less than the first reference value. It is preferable to control the driving part 600 so that the opening/closing part 500 opens the liquid discharge port 400 until it is restored to less than 2 reference values.

In this way, by maintaining the liquid level of the liquid 320 at least about the second reference value, it is possible to remain in the liquid storage unit 300 and continuously prevent the odor backflow phenomenon.

5 is a view showing the configuration of a dental cuspidor according to an embodiment of the present invention. As shown in FIG. 5, the opening/closing part 500 opens the liquid discharge port 400 only when the liquid 320 in the liquid storage part 300 exits through the liquid discharge port 400. It can be configured to be possible.

In the embodiment of FIG. 5, the opening/closing part 500 has a valve shape. Specifically, the valve is hinged to the upper end of the liquid discharge port 400, and the valve is tilted downward by receiving power applied through the rod from the driving unit 600, thereby discharging the liquid 320. Taking

It is preferable that a spring (not shown) is attached to the valve to enable a return operation. In addition, the rod is preferably provided with a screw (not shown) or a crank (not shown) to transmit power to the valve when the driving unit 600 is provided with a rotary motor (not shown) type actuator.

6 is a view showing the configuration of a dental cuspidor according to an embodiment of the present invention. As shown in Figure 6, the opening and closing part 500 is a stopper 510 that is detachable from the inlet of the liquid outlet 400 and a power transmission that transmits the power generated by the drive unit 600 to the stopper 510 A member 520 may be included.

6 (a) is illustrated in a structure in which the power transmission member 520 includes a lever and a string. The string is formed of a soft material, so that the power of the driving unit 600 can be transmitted to the stopper only when the stopper 510 is pulled to open the liquid discharge port 400.

On the other hand, the string is formed of a hard material, so that even when the stopper 510 is lowered to block the liquid discharge port 400, the power of the driving unit 600 can be transmitted to the stopper. In this case, it is possible to block the backflow of sewage.

In order to transmit the power in the up and down directions to the stopper, the driving unit 600 may be configured to have an electric motor or a gear assembly capable of both forward/reverse rotation.

6(b) illustrates the structure of the dental cuspidor 100 including a power transmission member 520 that is directly connected to the driving unit 600 and transmits power in the vertical direction.

In addition, the driving unit 600 may be configured to include any one of an electric motor and an electromagnet. As described above, by moving the power transmission member 520 using an electromagnet in addition to the electric motor, it is possible to attach the stopper 510 to the inlet of the liquid discharge unit 400 or to be separated from the inlet.

In one embodiment, in addition to the electromagnet, a switching circuit or element capable of changing the polarity of the electromagnet is further provided, and a permanent magnet is provided in the power transmission member 520, so that both the up and down directions of the stopper 510 are provided. It is possible to apply power with.

7 is a view showing the configuration of a dental cuspidor according to an embodiment of the present invention. As shown in FIG. 7 (a), the liquid information acquisition unit 700 includes an IR sensor 730 and is formed outside the outer wall 310 of the liquid storage unit 300, and the outer wall 310 It is preferable that all or part of) is formed of a transparent material so that the IR sensor 730 can detect the liquid level.

In general, the IR sensor 730 includes a light-emitting device that generates infrared rays and irradiates it to the outside, and a light-receiving device that receives infrared rays reflected from the external object. It is possible to detect external environmental factors through the level of the electrical signal generated from the light receiving device. In this embodiment, the IR sensor 730 is used for detecting the liquid level.

In addition, as shown in Figure 7 (b), the liquid information acquisition unit 700 includes a non-contact liquid level detection sensor 740, is formed outside the outer wall 310 of the liquid storage unit 300, the It is preferable that all or a part of the outer wall 310 is formed of a non-metallic material so that the non-contact liquid level detection sensor 740 can detect the liquid level.

The non-contact liquid level detection sensor 740 has a capacitor that senses the capacitance and generates a pulse by repeating charging and discharging, and when attached to the outside of a container containing a liquid, the capacitor is connected in parallel, and the pulse There is a change in the cycle of, and by using the above change, the water level inside the barrel is sensed.

It is preferable that the liquid information acquisition unit 700 is capable of vertical movement. By designing to enable physical movement as described above, the user can adjust the level of the first reference value. This makes it possible to store an appropriate amount of liquid desired by the user in the liquid storage unit 300.

8 is a flowchart illustrating a method of controlling a dental cuspidor according to an embodiment of the present invention. As shown in Figure 8,

According to an embodiment of the present invention, a method of controlling the dental cuspidor 100 includes the steps of detecting whether the liquid level of the liquid in the liquid storage unit 300 is greater than or equal to a first reference value (S100); When the liquid level is greater than or equal to the first reference value, controlling the driving part 600 so that the opening/closing part 500 opens the liquid discharge port 400 (S200).

9 is a flowchart illustrating a method of controlling a dental cuspidor according to an embodiment of the present invention. 9, in the control method of the dental cuspidor 100 of the present invention, when the liquid level is restored to less than the first reference value and a first time has elapsed, the opening/closing part 500 is The step (S300) of controlling the driving unit 600 to block 400 may be further included.

10 is a flowchart illustrating a method of controlling a dental cuspidor according to an embodiment of the present invention. As shown in FIG. 10, when a second time elapses after the liquid discharge port 400 is opened and the liquid level is still higher than the first reference value, the opening/closing part 500 blocks the liquid discharge port 400 It is preferable to further include a step (s400) of controlling the driving unit 600 to be performed.

The control method according to various embodiments of the present invention described above may be implemented as a computer program and provided to a server or devices in a state stored in various computer-readable recording media.

The recording medium may be a non-transitory computer readable medium, and the non-transitory readable medium is not a medium that stores data for a short moment, such as registers, caches, and memory, but stores data semi-permanently. , Means a medium that can be read by a device. Specifically, the above-described various applications or programs may be stored and provided in a non-transitory readable medium such as a CD, DVD, hard disk, Blu-ray disk, USB, memory card, ROM, or the like.

On the other hand, in the specification and claims, terms such as "first", "second", "third" and "fourth" are used to distinguish between similar elements, but not necessarily in a specific sequence or It is used to describe the order of occurrence. It will be understood that the terms so used are compatible under appropriate circumstances such that the embodiments of the present invention described herein may operate in a sequence other than, for example, shown or described herein. Likewise, where a method herein is described as comprising a series of steps, the order of those steps presented herein is not necessarily the order in which those steps can be performed, and any described steps may be omitted and/or may be omitted herein. Any other steps not described could be added to the method.

Terms such as "left", "right", "front", "back", "top", "bottom", "top", "bottom" of the present specification and claims are used for description and must be It is not intended to describe an immutable relative position. It will be understood that the terms so used are compatible under appropriate circumstances such that the embodiments of the present invention described herein may operate in a direction other than, for example, shown or described herein. As used herein, the term "connected" is defined as being connected directly or indirectly in an electrical or non-electrical manner. Objects described herein as being “adjacent” to each other may be those that are in physical contact with each other, close to each other, or in the same general range or area as appropriate for the context in which the phrase is used. The presence of the phrase "in one embodiment" is not necessarily the case, but refers to the same embodiment.

In addition, in the specification and claims, the designation of various variations of these expressions such as'connected','connected','fastened','fastened','coupled','coupled', etc. It is used as a meaning that includes connecting by or indirectly through other components.

In addition, the suffixes "module" and "unit" for the constituent elements used in the present specification are given or used interchangeably in consideration of only the ease of writing the specification, and do not themselves have a distinct meaning or role from each other.

In addition, terms used in the present specification are for explaining embodiments and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used in the specification,'comprise' and/or'comprising' means that the recited component, step, operation and/or element is one or more other elements, steps, operations and/or the presence of elements. Or does not exclude additions.

In addition, although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. In addition, various modifications are possible by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or prospect of the present invention.

10: dental cuspidor 11: container
12: socket 13: cover
14: strainer 15: water dispenser
16: chair 17: table
18: monitor 19: lighting
100: dental cuspidor 200: container part
300: liquid storage unit 310: outer wall
320: liquid 400: liquid outlet
500: opening and closing part 510: stopper
520: power transmission member 600: drive unit
700: liquid information acquisition unit 710: first liquid level detection sensor
720: second level detection sensor 730: IR sensor
740: non-contact liquid level detection sensor 800: control unit
900: cover portion 910: strainer

Claims (12)

Container part;
A liquid storage unit formed at the bottom of the container unit;
A liquid discharge port connected to a lower end of the liquid storage unit to discharge the liquid stored in the liquid storage unit downward;
An opening and closing part for opening and blocking the liquid discharge port;
A driving unit for operating the opening and closing unit;
A liquid information acquisition unit that detects whether the stored liquid level is equal to or greater than a first reference value; And
When the liquid level is greater than or equal to the first reference value, the opening and closing unit opens the liquid discharge port, and includes a control unit for controlling the driving unit so that a part of the stored liquid remains in the liquid storage unit. The method of claim 1,
The control unit,
When the liquid level is restored to less than the first reference value and a first time has elapsed, the driving part is controlled so that the opening and closing part blocks the liquid discharge port. The method of claim 2,
The control unit,
When a second time elapses after the liquid discharge port is opened and the liquid level is still higher than the first reference value, the drive unit determines that the wastewater flows back through the liquid discharge port, and the opening/closing unit blocks the liquid discharge port. Dental cuspidor, characterized in that for controlling and outputting an alarm visually or audibly. The method of claim 1,
The liquid information acquisition unit includes a first liquid level detection sensor and a second liquid level detection sensor formed below the first liquid level detection sensor,
The control unit,
When the first liquid level detection sensor detects that the liquid level is greater than or equal to the first reference value, the opening/closing unit may be configured only until the second liquid level detection sensor detects that the liquid level is restored to less than a second reference value less than the first reference value. And controlling the driving unit to open the liquid discharge port so that a part of the stored liquid remains in the liquid storage unit. The method of claim 1,
The opening and closing part,
A valve having one end hinged to the upper end of the liquid outlet;
A rod that transmits the power applied from the driving unit to the valve and tilts the valve downward to open the liquid outlet; And
When the application of the power is released, a spring for returning the valve to the original position; dental cuspidor comprising a. The method of claim 1
The opening and closing portion includes a plug detachable from the inlet of the liquid discharge port and a power transmission member for transmitting power generated by the driving unit to the plug,
The driving unit is a dental cuspidor, characterized in that comprising any one of an electric motor and an electromagnet. The method of claim 1,
The liquid information acquisition unit,
A dental cuspidor, characterized in that it is formed on an outer surface of an outer wall of the liquid storage unit to move up and down for level adjustment of the first reference value. The method of claim 7,
The liquid information acquisition unit includes a non-contact liquid level detection sensor,
At least a portion of the outer wall is formed of a non-metallic material so that the non-contact liquid level detection sensor detects the liquid level. The method of claim 7,
The liquid information acquisition unit includes an IR sensor,
At least a portion of the outer wall is formed of a transparent material so that the IR sensor detects the liquid level. A container part, a liquid storage part formed at the bottom of the container part, a liquid discharge port connected to the lower end of the liquid storage part to discharge the liquid stored in the liquid storage part downward, an opening/closing part for opening and blocking the liquid discharge port, and the opening/closing part In the liquid control method for a dental cuspidor including a driving unit to,
Detecting whether a liquid level in the liquid storage unit is equal to or higher than a first reference value; And
When the liquid level is greater than or equal to the first reference value, controlling the driving unit so that the opening and closing unit opens the liquid discharge port but leaves a part of the stored liquid in the liquid storage unit. The method of claim 10,
When the liquid level is restored to less than the first reference value and a first time has elapsed, the control method of a dental cuspidor table further comprising the step of controlling the driving part so that the opening/closing part blocks the liquid discharge port. The method of claim 11,
When a second time elapses after the liquid discharge port is opened and the liquid level is still higher than the first reference value, the drive unit determines that the wastewater flows back through the liquid discharge port, and the opening/closing part blocks the liquid discharge port. Controlling a dental cuspidor further comprising a step of controlling and outputting an alarm visually or audibly.

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