CN115645214B

CN115645214B - Dental chair degassing unit and dental chair

Info

Publication number: CN115645214B
Application number: CN202211014808.6A
Authority: CN
Inventors: 吕冰; 周元胜; 黄学华; 袁文海
Original assignee: Guangzhou Ajax Medical Equipment Co Ltd
Current assignee: Guangzhou Ajax Medical Equipment Co Ltd
Priority date: 2022-08-23
Filing date: 2022-08-23
Publication date: 2023-09-26
Anticipated expiration: 2042-08-23
Also published as: CN115645214A

Abstract

The application is applicable to the technical field of dental equipment, and provides a dental chair disinfection device and a dental chair. The first shell is provided with a liquid mixing cavity, a first liquid inlet end and a second liquid inlet end which are communicated with the liquid mixing cavity. The first control switch is arranged between the first liquid inlet end and the first shell; the second control switch is arranged between the second liquid inlet end and the first shell. The control system is respectively in signal connection with the first control switch and the second control switch, and the first control switch and the second control switch are respectively controlled to be turned on through the control system, so that the first liquid inlet end and the second liquid inlet end are respectively communicated with the liquid mixing cavity, and the first liquid and the second liquid respectively enter the liquid mixing cavity and are mixed in the liquid mixing cavity to form mixed liquid. The dental chair disinfection device provided by the application can automatically prepare the mixed solution, and has higher automation degree.

Description

Dental chair degassing unit and dental chair

Technical Field

The application relates to the technical field of dental equipment, in particular to a dental chair disinfection device and a dental chair.

Background

Dental chairs are used as important equipment in the dental field, complex pipelines are usually arranged inside the dental chairs, disinfection devices are required to be arranged on the dental chairs, and the disinfection devices disinfect the pipelines and water-consuming ends connected with the pipelines regularly so as to reduce the possibility of bacteria breeding in the pipelines or the water-consuming ends to cause infection of patients.

At present, the common method for sterilizing the dental chair pipeline comprises the following steps: firstly, a certain amount of high-concentration disinfection stock solution and a certain amount of tap water are mixed into a certain concentration disinfection solution, then the mixed disinfection solution is injected into a disinfection device, the disinfection device is connected with each pipeline of the dental chair, and the disinfection device conveys the disinfection solution to each pipeline of the dental chair and the water end connected with each pipeline so as to disinfect each pipeline of the dental chair and the water end connected with each pipeline.

From the above, the existing disinfection device cannot automatically prepare disinfection liquid, and the prepared disinfection liquid is manually injected into the disinfection device, so that the disinfection process is complicated, and the automation degree is low.

Disclosure of Invention

The embodiment of the application aims to provide a dental chair disinfection device and a dental chair, and aims to solve the technical problem that the automation degree of the disinfection device in the prior art is low.

In order to achieve the above purpose, the application adopts the following technical scheme: provided is a dental chair sterilization apparatus including:

the first shell is provided with a liquid mixing cavity, and is provided with a first liquid inlet end and a second liquid inlet end which are communicated with the liquid mixing cavity;

the first control switch is arranged between the first liquid inlet end and the first shell and used for controlling the communication state between the first liquid inlet end and the liquid mixing cavity;

The second control switch is arranged between the second liquid inlet end and the first shell and used for controlling the communication state between the second liquid inlet end and the liquid mixing cavity;

the control system is connected with the first control switch and the second control switch in a signal mode respectively and is used for controlling the on-off states of the first control switch and the second control switch.

In one possible design, the dental chair disinfection device further comprises a height detection structure for detecting a dental chair height; the height detection structure is in signal connection with the control system, and the control system is used for adjusting the opening and closing states of the first control switch and the second control switch according to the height of the dental chair fed back by the height detection structure.

In one possible design, the height detecting structure includes a lifting adjusting motor, the lifting adjusting motor is used for controlling lifting of the dental chair, the lifting adjusting motor is in signal connection with the control system, and the control system controls the on-off states of the first control switch and the second control switch according to lifting adjusting quantity fed back by the lifting adjusting motor.

In one possible design, the dental chair disinfection device further comprises a first liquid level sensor, wherein the first liquid level sensor is installed in the liquid mixing cavity and is in signal connection with the control system, the first liquid level sensor is used for detecting the liquid level height in the liquid mixing cavity, and the control system controls the opening and closing states of the first control switch and the second control switch according to the liquid level height information fed back by the first liquid level sensor.

In one possible design, the dental chair disinfection device further comprises a liquid storage bottle, wherein the liquid storage bottle is connected with the first liquid inlet end, and the liquid storage bottle is used for storing first liquid.

In one possible design, a second liquid level sensor is arranged in the liquid storage bottle, the second liquid level sensor is used for detecting the liquid level in the liquid storage bottle, and the control system is in signal connection with the second liquid level sensor.

In one possible design, the first housing has a first inlet through which at least one of the first and second liquid intake ends communicates with the liquid mixing chamber; the dental chair disinfection device comprises a third control switch, wherein the third control switch is arranged at the first inlet and is used for controlling the opening and closing states of the first inlet, and the third control switch is in signal connection with the control system.

In one possible design, the dental chair disinfection device further comprises a first booster valve, the first booster valve is connected with the third control switch, the first booster valve is connected with the control system in a signal manner, and the control system controls the opening and closing state of the third control switch by controlling the opening and closing state of the first booster valve, so that the opening and closing state of the first inlet is controlled.

In one possible design, the dental chair disinfection device further comprises a liquid storage cavity, wherein the liquid storage cavity is communicated with the liquid mixing cavity, the liquid storage cavity is communicated with the water end of the dental chair, a fourth control switch is arranged between the liquid storage cavity and the liquid mixing cavity and used for controlling the communication state of the liquid storage cavity and the liquid mixing cavity, the liquid storage cavity is connected with a liquid storage pressurizing pipeline, and the liquid storage pressurizing pipeline is used for leading pressurizing medium into the liquid storage cavity.

The application also provides a dental chair comprising a dental chair disinfection device, the dental chair disinfection device comprising:

the control system is respectively connected with the first control switch and the second control switch in a signal manner and is used for controlling the on-off states of the first control switch and the second control switch;

the height detection structure is in signal connection with the control system, the height detection structure is used for detecting the height of the dental chair, and the control system is also used for adjusting the opening and closing states of the first control switch and the second control switch according to the height of the dental chair fed back by the height detection structure. .

The dental chair disinfection device provided by the application has the beneficial effects that: compared with the prior art, the dental chair disinfection device has the advantages that the first liquid inlet end is used for allowing the first liquid to enter the liquid mixing cavity, and the second liquid inlet end is used for allowing the second liquid to enter the liquid mixing cavity. When the first control switch is turned on, the first liquid inlet end is communicated with the liquid mixing cavity, and the first liquid enters the liquid mixing cavity through the first liquid inlet end. When the second control switch is turned on, the second liquid inlet end is communicated with the liquid mixing cavity, and the second liquid enters the liquid mixing cavity through the second liquid inlet end. The first control switch and the second control switch are respectively controlled to be turned on through the control system, so that the first liquid inlet end and the second liquid inlet end are respectively communicated with the liquid mixing cavity, and the first liquid and the second liquid respectively enter the liquid mixing cavity and are mixed in the liquid mixing cavity to form mixed liquid. One of the first liquid and the second liquid can be purified water (or tap water), the other one is high-concentration disinfection stock solution, and the purified water (or tap water) and the high-concentration disinfection stock solution are mixed in a mixed solution cavity to form mixed solution, and the mixed solution is the disinfection solution. Therefore, the dental chair disinfection device provided by the application can automatically prepare disinfection liquid, and has higher automation degree.

Because the dental chair provided by the application comprises the same technical characteristics as the dental chair disinfection device provided by the application, the dental chair provided by the application has the beneficial effects of the dental chair disinfection device and is not repeated herein.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a dental chair disinfection apparatus according to an embodiment of the present application;

FIG. 2 is a schematic view of a dental chair disinfection apparatus according to another embodiment of the present application;

FIG. 3 is a schematic cross-sectional view showing the overall structure of a dental chair disinfection apparatus according to another embodiment of the present application;

FIG. 4 is a schematic diagram of the relationship between the flow rate of the first liquid and the height of the liquid storage bottle of the dental chair disinfection apparatus according to one embodiment of the present application;

FIG. 5 is an enlarged partial schematic view at C in FIG. 3;

FIG. 6 is an enlarged schematic view of a portion of FIG. 1 at A;

fig. 7 is a schematic structural view of a third control switch of the dental chair disinfection apparatus according to an embodiment of the present application;

FIG. 8 is a schematic view showing a state in which a dental chair disinfection apparatus according to an embodiment of the present application delivers a mixed solution to a second chamber;

FIG. 9 is a schematic view showing a state of a dental chair disinfection device according to an embodiment of the present application when a mixed solution is prepared in a main chamber;

FIG. 10 is an enlarged schematic view of a portion of FIG. 9 at D;

FIG. 11 is a schematic view of the structure of a check valve of a dental chair disinfection apparatus according to an embodiment of the present application;

fig. 12 is a partially enlarged schematic view at B in fig. 1.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the structures or elements being referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In order to explain the technical scheme of the application, the following is a detailed description with reference to the specific drawings and embodiments.

Note that, in fig. 1 and 2, solid arrows indicate the direction of the liquid flow, and broken arrows indicate the direction of the pressurized medium flow; arrows in fig. 8 indicate the direction of liquid flow; the arrows in the first chamber 211 in fig. 9 indicate the direction of the flow of the pressurizing medium, and the arrows in the second outlet 240 indicate the direction of the flow of the liquid.

As shown in fig. 1 and 2, one embodiment of the present application provides a dental chair disinfection apparatus comprising a first housing, a first control switch 120, a second control switch 130, and a control system. The first housing has a liquid mixing chamber, and the first housing is provided with a first liquid inlet end 101 and a second liquid inlet end 102 which are communicated with the liquid mixing chamber. The first control switch 120 is installed between the first liquid inlet 101 and the first housing, and is used for controlling the communication state between the first liquid inlet 101 and the liquid mixing cavity. The second control switch 130 is installed between the second liquid inlet 102 and the first housing, and is used for controlling the communication state between the second liquid inlet 102 and the liquid mixing cavity; the control system is respectively connected with the first control switch 120 and the second control switch 130 in a signal manner (the signal connection can be through a data line connection or a wireless connection, etc.), and the control system is used for controlling the on-off state of the first control switch 120 and the second control switch 130.

In the dental chair disinfection device provided in this embodiment, the first liquid inlet end 101 is used for allowing the first liquid to enter the liquid mixing cavity, and the second liquid inlet end 102 is used for allowing the second liquid to enter the liquid mixing cavity. When the first control switch 120 is turned on, the first liquid inlet end 101 is communicated with the liquid mixing cavity, and the first liquid enters the liquid mixing cavity through the first liquid inlet end 101. When the second control switch 130 is turned on, the second liquid inlet 102 is communicated with the liquid mixing cavity, and the second liquid enters the liquid mixing cavity through the second liquid inlet 102. The first control switch 120 and the second control switch 130 are controlled to be turned on by the control system respectively, so that the first liquid inlet end 101 and the second liquid inlet end 102 are communicated with the liquid mixing cavity respectively, and the first liquid and the second liquid enter the liquid mixing cavity respectively and are mixed in the liquid mixing cavity to form mixed liquid. One of the first liquid and the second liquid can be purified water (or tap water), the other one is high-concentration disinfection stock solution, and the purified water (or tap water) and the high-concentration disinfection stock solution are mixed in a mixed solution cavity to form mixed solution, and the mixed solution is the disinfection solution. From the above, the dental chair disinfection device provided by the embodiment can automatically prepare disinfection solution, and has higher automation degree.

The dental chair disinfection device provided by the embodiment can be applied to dental chairs. The dental chair comprises a liquid inlet, a pipeline and a water end, wherein two ends of the pipeline are respectively connected with the liquid inlet and the water end. In an alternative embodiment, the dental chair disinfection device is connected to the liquid inlet of the dental chair such that the dental chair disinfection device is connected to the tubing and the water end of the dental chair such that the dental chair disinfection device is capable of delivering a disinfection solution to the dental chair to disinfect the tubing of the dental chair and the water end connected to the tubing.

In another alternative embodiment, the first liquid and the second liquid may be different liquids for preparing the working solution, so that the dental chair disinfection device may also prepare the working solution for use in working of the dental chair, and convey the working solution to the water end of the dental chair for use by the dental chair through the pipeline of the dental chair. The dental chair disinfection device provided by the embodiment can also be applied to other equipment to disinfect the other equipment. The following description will be made with the dental chair disinfection device connected with the dental chair.

In another alternative embodiment, the first liquid and the second liquid may also be the same liquid. For example, the first liquid and the second liquid are tap water, the tap water enters the liquid mixing cavity through the first liquid inlet end 101 and the second liquid inlet end 102 respectively and is directly conveyed into a pipeline of the dental chair and a water use end connected with the pipeline, and the tap water is used for cleaning the pipeline and the water use end of the dental chair.

In one possible design, the first liquid inlet end 101 may be a through hole for communicating with an external liquid inlet pipe, into which the first liquid is injected. When the first control switch 120 is turned on, the first liquid enters the liquid mixing cavity through the first liquid inlet end 101. Alternatively, the first liquid inlet 101 may be a quick connector, which is connected to an external liquid inlet pipe. Or, the first liquid inlet end 101 is of a pipeline structure, the first liquid inlet end 101 is connected with a source for conveying the first liquid, and the first liquid flows into the liquid mixing cavity through the first liquid inlet end 101. The first control switch 120 may be a solenoid valve or other electrically operated switch.

In one possible design, the second fluid inlet 102 may also be a through hole, a quick connect fitting, or a pipe. Specifically, the second liquid inlet 102 is a pipe structure, the second liquid inlet 102 is directly connected to a second liquid delivery source, and when the second liquid is tap water, the second liquid delivery source may be a faucet. The second liquid conveying device injects the second liquid into the second liquid inlet end 102, and after the control system controls the second control switch 130 to be turned on, the second liquid in the second liquid inlet end 102 enters the liquid mixing cavity. The second control switch 130 may also be a solenoid valve or other electrically operated switch.

In one possible design, as shown in fig. 1 and 2, the dental chair disinfection device further comprises a liquid storage bottle 400, wherein the liquid storage bottle 400 is connected with the first liquid inlet end 101, and the liquid storage bottle 400 is used for storing the first liquid. When the mixed liquid is prepared, the first liquid in the liquid storage bottle 400 can immediately enter the mixed liquid cavity without manually injecting the first liquid into the mixed liquid cavity through the first liquid inlet end 101, so that the degree of automation is higher.

In a specific embodiment, as shown in fig. 1, the first liquid inlet 101 is a pipe structure, the first control switch 120 is a solenoid valve, and the first control switch 120 has a liquid inlet and a liquid outlet. One end of the first liquid inlet end 101 is communicated with the liquid inlet of the first control switch 120, the other end is communicated with the liquid storage bottle 400, and the liquid outlet of the first control switch 120 is communicated with the liquid mixing cavity, so that the first liquid inlet end 101 is communicated with the liquid mixing cavity. The liquid storage bottle 400 is located above the first housing, and the first liquid in the liquid storage bottle 400 flows into the first liquid inlet end 101 under the action of self gravity. After the control system controls the first control switch 120 to be turned on, the liquid inlet and the liquid outlet of the first control switch 120 are communicated. The first liquid flows into the first liquid inlet end 101 from the liquid storage bottle 400, then enters the first control switch 120 through the liquid inlet, finally enters the liquid mixing cavity through the liquid outlet, and other power conveying mechanisms for outputting the first liquid are not required, so that the manufacturing cost is saved.

In one embodiment, as shown in fig. 3, the first housing further has a first outlet 170 in communication with the mixing chamber, the first outlet 170 being for discharging the mixed liquor in the mixing chamber. Specifically, the first outlet 170 may be in communication with the liquid inlet, and after the preparation of the mixed liquid in the mixing chamber is completed, the mixed liquid may be discharged into the pipeline through the first outlet 170 and reach the water end.

In an alternative embodiment, the first outlet 170 may be provided with a liquid outlet control switch for controlling the communication state of the first outlet 170 and the liquid inlet hole. When the liquid outlet control switch is turned on, the first outlet 170 is communicated with the liquid inlet hole, mixed liquid in the liquid mixing cavity can enter the liquid inlet hole through the first outlet 170, and when the liquid outlet control switch is turned off, the first outlet 170 is disconnected from the liquid inlet hole, and the mixed liquid in the liquid mixing cavity stops entering the liquid inlet hole.

In one possible design, the liquid outlet control switch is connected with a control system in a signal manner, and the control system is used for controlling the opening and closing states of the liquid outlet control switch. When the mixed liquid cavity is preparing mixed liquid, the control system controls the liquid outlet control switch to be closed to prevent liquid in the mixed liquid cavity from being discharged from the first outlet 170, and when the mixed liquid is preparing, the control system controls the liquid outlet control switch to be opened to enable the mixed liquid in the mixed liquid cavity to be discharged from the first outlet 170.

In one possible design, the control system can control the on-time of the first control switch 120 and the on-time of the second control switch 130 to control the volumes of the first liquid and the second liquid input into the mixing chamber, thereby adjusting the concentration of the prepared mixture. Specifically, one of the first liquid and the second liquid is tap water, the other is disinfection stock solution, and a certain volume of tap water and a certain volume of disinfection stock solution are injected into the liquid mixing cavity to prepare a disinfection solution with a certain concentration in the liquid mixing cavity, wherein the disinfection solution can be used for disinfecting a pipeline of a dental chair and a water end connected with the pipeline.

In one possible design, the dental chair disinfection device further comprises a height detection structure for detecting the dental chair height; the height detection structure is in signal connection with a control system, and the control system is used for adjusting the on-off states of the first control switch 120 and the second control switch 130 according to the height of the dental chair fed back by the height detection structure. When the height of the dental chair is adjusted, the height of the dental chair disinfection device can be changed. After the height of the dental chair disinfection device is changed, the flow rate of the first liquid and the second liquid when entering the liquid mixing cavity is changed. In order to reduce the concentration error of the mixed solution prepared in the mixed solution cavity, by arranging the height detection structure, the control system can control the opening time of the first control switch 120 and the second control switch 130 according to the height of the dental chair, so as to control the volumes of the first liquid and the second liquid entering the mixed solution cavity, and the mixed solution with the concentration meeting the use requirement can be prepared when the dental chair disinfection device is positioned at different heights, so that the concentration error of the prepared mixed solution is reduced.

In one embodiment, the control system controls the opening time of the first control switch 120 and the second control switch 130 according to the change value of the height of the dental chair, so as to control the volumes of the first liquid and the second liquid introduced into the liquid mixing cavity. For example, as the height of the dental chair increases, the flow rates of the first and second liquids (flow rates when flowing into the mixing chamber) increase, and the control system controls the first and second control switches 120 and 130 to decrease in their on-times to maintain the volumes of the first and second liquids introduced into the mixing chamber, thereby maintaining the concentration of the mixed liquid unchanged, and reducing concentration errors of the mixed liquid prepared by the dental chair disinfection device.

The phenomenon that the above-described elevation of the dental chair increases the flow rate of the first liquid and the second liquid can be verified by the following experiments. Since the height variation of the liquid storage bottle 400 is consistent with the height variation of the dental chair, the height variation of the liquid storage bottle 400 can represent the height variation of the dental chair. It should be noted that the following experiment is performed on the premise that the inner diameter of the liquid outlet of the first control switch 120 is 2mm and the inner diameter of the first liquid inlet end 101 is 4mm, and the following experiment is specifically performed on the basis of the height of the liquid storage bottle 400, and table 1 is an experimental data table of the flow rate of the first liquid changing along with the change of the height of the liquid storage bottle 400:

Table 1 table for measuring the height of the liquid storage bottle and the flow rate of the first liquid

Note that: the height of the liquid storage bottle 400 in table 1 refers to the height of the upper surface of the liquid storage bottle from the ground.

From the data in table 1, the relationship between the flow rate of the first liquid and the height of the liquid storage bottle 400 is shown in fig. 4, and specifically, the following relationship y= (1/35) x+1.24 is satisfied, where Y represents the flow rate of the first liquid, and x represents the height of the liquid storage bottle 400. As can be seen from table 1, when the capacity of the liquid storage bottle 400 is 800ml, the flow rate of the first liquid increases as the height of the liquid storage bottle 400 increases; when the capacity of the liquid storage bottle 400 is 300nl, the flow rate of the first liquid also becomes larger as the height of the liquid storage bottle 400 increases. When the liquid storage bottle 400 is at the same height, the flow rate change is smaller when the capacity of the liquid storage bottle 400 is 300ml and 800ml, that is, the influence of the liquid level height of the first liquid in the liquid storage bottle 400 on the flow rate of the first liquid is smaller. Since the height variation of the liquid storage bottle 400 and the height variation of the dental chair are identical, it can be confirmed from the above experiments that the flow rate of the first liquid becomes greater as the height of the dental chair increases. And since the height change of the liquid storage bottle 400 also represents the height change of the dental chair sterilizing apparatus, the height of the liquid storage bottle 400, that is, the height of the dental chair sterilizing apparatus is increased, so that the flow rate of the second liquid is also increased.

In a specific embodiment, the height detecting structure includes a lifting adjusting motor, the lifting adjusting motor is used for controlling lifting of the dental chair, the lifting adjusting motor is connected with a control system through a signal, and the control system controls the on-off states of the first control switch 120 and the second control switch 130 according to lifting adjusting quantity fed back by the lifting adjusting motor. The lifting adjusting motor can be a rotary motor or a linear motor, etc. The lifting adjusting motor is connected with the dental chair. After the lifting adjusting motor controls the dental chair to lift, the lifting adjusting motor feeds back the lifting adjusting quantity for controlling the dental chair to lift to the control system. The lifting adjustment quantity can be specifically the power output time of the lifting adjustment motor or the output quantity of the lifting adjustment motor, and when the lifting adjustment motor is a rotating motor, the output quantity can be the number of turns of an output shaft of the rotating motor; when the lifting motor is a linear motor, the output quantity may be a distance moved by an output shaft of the linear motor. The control system judges the height of the dental chair according to the lifting adjustment quantity, specifically, a conversion formula can be preset in the control system, and the control system converts the lifting adjustment quantity into the height of the dental chair according to the conversion formula. Or a first data table is preset in the control system, and the control system finds the corresponding height of the dental chair through the current lifting adjustment quantity. The control system can also be preset with a second data table, and find the height of the corresponding liquid storage bottle 400 according to the height of the current dental chair, and control the opening time of the first control switch 120 and the second control switch 130 according to the height of the liquid storage bottle 400, namely, the volume of the first liquid and the second liquid entering the liquid mixing cavity.

In another embodiment, the height detection structure includes a height sensor that is mounted to either the dental chair or the dental chair disinfection apparatus. Specifically, the height sensor is installed on the outer sidewall of the liquid storage bottle 400, and the height sensor is used for directly detecting the height of the liquid storage bottle 400 from the ground. Or the height sensor is arranged on the outer side wall of the dental chair and is used for detecting the height of the dental chair from the ground. The height sensor may be a photoelectric sensor, radar or infrared rangefinder.

In one possible design, as shown in fig. 3, the dental chair disinfection device further includes a first liquid level sensor 180, the first liquid level sensor 180 is installed in the liquid mixing cavity and is in signal connection with a control system, the first liquid level sensor 180 is used for detecting the liquid level in the liquid mixing cavity, and the control system controls the on-off states of the first control switch 120 and the second control switch 130 according to the liquid level information fed back by the first liquid level sensor 180. The first liquid level sensor 180 feeds back the liquid level height in the liquid mixing cavity to the control system, and the control system judges whether the mixed liquid needs to be prepared according to the liquid level height fed back by the first liquid level sensor 180.

In a specific embodiment, a first maximum level height value is preset in the control system. The first liquid level sensor can monitor the liquid level in the liquid mixing cavity in real time and feed back the liquid level in the liquid mixing cavity monitored in real time to the control system. When the liquid level in the liquid mixing cavity is greater than the first minimum liquid level height value, the liquid mixing cavity is sufficient, the mixed liquid does not need to be prepared, and the control system controls the first control switch 120 and the second control switch 130 to be closed. When the liquid level in the liquid mixing cavity reaches or is smaller than the first minimum liquid level value, which indicates that the liquid mixture in the liquid mixing cavity is insufficient, the mixed liquid needs to be prepared again, and the control system firstly controls the first control switch 120 to be turned on and delays for a first time period so as to inject the first liquid with the first volume into the liquid mixing cavity. After the first period of time is over, the control system controls the first control switch 120 to be turned off, and controls the second control switch 130 to be turned on and delays for a second period of time, so as to inject a second volume of the second liquid into the liquid mixing cavity. After the second period of time is over, the control system controls the second control switch 130 to be turned off, indicating that the preparation of the mixed liquor is completed, and controls the liquid outlet control switch to be turned on, so that the mixed liquor is discharged from the first outlet 170. It should be noted that, if the liquid level in the liquid mixing cavity is smaller than the first minimum liquid level, after the first volume of the first liquid and the second volume of the second liquid are injected into the liquid mixing cavity, the liquid level in the liquid mixing cavity is greater than the first minimum liquid level.

In one possible design, the first time period and the second time period may be performed sequentially. For example, control first controls the first control switch 120 to turn on and delay a first period of time, and then controls the second control switch 130 to turn on and delay a second period of time; or the control system firstly controls the second control switch 130 to be turned on and delay the second time period, and then controls the first control switch 120 to be turned on and delay the first time period. Or the first time period and the second time period may be performed simultaneously, and the control system simultaneously controls the first control switch 120 to be turned on and delays the first time period and the second control switch 130 to be turned on and delays the second time period.

In one possible design, first level sensor 180 may be a floating ball level transmitter, an ultrasonic level transmitter, a radar level transmitter, an electro-optical level sensor, or a level probe assembly, among others. For example, when the first liquid level sensor 180 is a photoelectric liquid level sensor, the position of the photoelectric liquid level sensor in the liquid mixing cavity is the first lowest liquid level height value. When the liquid in the liquid mixing cavity is not passing through the photoelectric sensor, the liquid mixing cavity has enough mixed liquid. When the liquid level in the liquid mixing cavity is lower than the position of the photoelectric sensor, the photoelectric sensor exposes the liquid level, the photoelectric sensor feeds back a signal indicating that the liquid in the liquid mixing cavity is insufficient to the control system, the control system respectively controls the first control switch 120 and the second control switch 130 to be opened so as to inject a first volume of first liquid and a second volume of second liquid into the liquid mixing cavity, and the control system respectively controls the first control switch 120 and the second control switch 130 to be closed, so that the liquid in the liquid mixing cavity is enabled to permeate the photoelectric liquid level sensor again. The photoelectric liquid level sensor has small volume and high reaction speed, and the occupation space of the first liquid level sensor 180 can be reduced by adopting the photoelectric liquid level sensor.

In one possible design, first level sensor 180 is a level probe assembly that includes a low level probe and a high level probe. The height value of the low liquid level probe from the bottom surface of the liquid mixing cavity is a first lowest liquid level height value; the height value of the high liquid level probe from the bottom surface of the liquid mixing cavity is a first highest liquid level height value. The combination of the low liquid level probe and the high liquid level probe can be used for detecting the first lowest liquid level height in the liquid mixing cavity and detecting the first highest liquid level height in the liquid mixing cavity.

In one possible design, a second liquid level sensor 410 is disposed in the liquid storage bottle 400, the second liquid level sensor 410 is used for detecting the liquid level in the liquid storage bottle 400, and the control system is in signal connection with the second liquid level sensor 410. The control system is further configured to control the on/off state of the first control switch 120 according to the level height value fed back by the second level sensor 410. A second lowest liquid level height value and a second highest liquid level height value are preset in the control system, and when the liquid level height in the liquid storage bottle 400 is greater than the second lowest liquid level height value, the first liquid in the liquid storage bottle 400 is enough; when the liquid level in the liquid storage bottle 400 reaches or is less than the second minimum liquid level value, it indicates that the first liquid in the liquid storage bottle 400 is insufficient. When the liquid in the liquid storage bottle 400 is insufficient, the control system controls the first control switch 120 to be closed, and the injection of the first liquid into the liquid mixing cavity is suspended until the liquid level in the liquid storage bottle 400 reaches the second highest liquid level height value due to the fact that the first liquid is injected into the liquid storage bottle 400, and the control system controls the first control switch 120 to be opened, so that the injection of the first liquid into the liquid mixing cavity is continued. The second liquid level sensor 410 may have the same structure as the first liquid level sensor 180, and will not be described herein.

In one possible design, the dental chair disinfection device further comprises an alarm, and the control system is in signal connection with the alarm and is used for controlling the alarm to alarm according to the liquid level fed back by the second liquid level sensor 410. When the second liquid level sensor 410 detects that the liquid level in the liquid storage bottle 400 reaches or is smaller than the second minimum liquid level value, the control system controls the alarm to alarm, so as to prompt that the first liquid in the liquid storage bottle 400 is insufficient, and the first liquid needs to be injected into the liquid storage bottle 400. The alarm can be a warning light, a buzzer or a display panel (the display panel is used for displaying alarm prompts) and the like.

In one possible design, as shown in fig. 2 and 3, the first housing is connected with a second pressure increasing valve 160, the second pressure increasing valve 160 is connected with a second pressure increasing pipe 161, and a pressure increasing medium (pressurized gas or pressurized liquid) is injected into the second pressure increasing pipe 161. The second pressure increasing valve 160 is used for controlling the communication state of the second pressure increasing pipeline 161 and the liquid mixing cavity. When the second pressure increasing valve 160 is opened, the second pressure increasing pipe 161 is communicated with the liquid mixing cavity, and the pressure increasing medium in the second pipe enters the liquid mixing cavity to increase the pressure in the liquid mixing cavity, so that the mixed liquid in the liquid mixing cavity is discharged from the first outlet 170. When the second pressure increasing valve 160 is closed, the second pressure increasing pipe 161 is disconnected from the liquid mixing cavity, the pressurizing medium no longer enters the liquid mixing cavity, the pressure in the liquid mixing cavity gradually decreases until the pressure is equal to the external atmospheric pressure, and the mixed liquid stops being discharged from the liquid mixing cavity.

In one possible design, the second booster valve 160 is in signal connection with a control system, which is also used to control the on-off state of the second booster valve 160. When the mixed liquor is required to be output from the mixed liquor cavity, the control system controls the second pressurizing valve 160 to be opened so as to pressurize the mixed liquor cavity, so that the mixed liquor in the mixed liquor cavity is discharged. When the mixed liquor does not need to be output from the mixed liquor cavity, the control system controls the second pressurizing valve 160 to be closed, the pressurizing of the mixed liquor cavity is stopped, and the mixed liquor is stopped being discharged from the mixed liquor cavity.

In a specific embodiment, the second pressure boost pipe 161 is connected to a pressure regulating valve 162, the pressure regulating valve 162 is connected to a pressure boost control valve 163, and the on-off state of the pressure boost control valve 163 is controlled to control whether to introduce the pressure boost medium into the second pressure boost pipe 161. Specifically, when the boost control valve 163 is opened, the boost medium enters the pressure regulating valve 162 through the boost control valve 163 to be regulated, and then enters the second boost pipe 161. The pressurizing medium is specifically a pressurizing gas.

In one possible design, the first housing has a first inlet 140, at least one of the first and second liquid inlet ends 101, 102 being in communication with the liquid mixing chamber through the first inlet 140; the dental chair disinfection device comprises a third control switch 150, wherein the third control switch 150 is arranged at the first inlet 140, the third control switch 150 is used for controlling the opening and closing states of the first inlet 140, and the third control switch 150 is in signal connection with a control system. When the mixed liquid in the mixed liquid cavity needs to be output, the control system controls the second pressurizing valve 160 to be opened, and controls the third control switch 150 to be closed, so that the first inlet 140 is closed, the pressurizing medium is prevented from being discharged from the first inlet 140 after entering the mixed liquid cavity, and the sealing performance of the mixed liquid cavity is improved.

In one embodiment, as shown in fig. 3, the first liquid inlet 101 and the second liquid inlet 102 are both in communication through the first inlet 140. Specifically, the mixing chamber includes a main chamber 111 and a sub-chamber 112, the first liquid inlet 101 and the second liquid inlet 102 are both in communication with the sub-chamber 112, and the sub-chamber 112 is in communication with the main chamber 111 through the first inlet 140. The first liquid and the second liquid enter the auxiliary chamber 112 first, then enter the main chamber 111 through the first inlet 140, and after the first liquid and the second liquid enter the main chamber 111, the first liquid and the second liquid are mixed in the main chamber 111 to form a mixed liquid, and the process of mixing the first liquid and the second liquid into the main chamber 111 to form the mixed liquid is also a process of preparing the mixed liquid. The first liquid level sensor 180 is located in the main chamber 111 for detecting the liquid level of the main chamber 111. The second pressure increasing valve 160 is used for controlling the communication state between the second pressure increasing pipe 161 and the main chamber 111, that is, when the mixed liquid in the mixed liquid cavity needs to be discharged, only the main chamber 111 needs to be pressurized. By arranging the main chamber 111 and the auxiliary chamber 112, the auxiliary chamber 112 is used as a liquid inlet pipeline, so that the first liquid and the second liquid are mixed by entering the main chamber 111 through the first inlet 140 after passing through the auxiliary chamber 112, the opening in the main chamber 111 is reduced, and the tightness of the main chamber 111 is improved.

In one possible design, as shown in fig. 2 and 3, the dental chair disinfection device further comprises a first booster valve 190, the first booster valve 190 is connected with the third control switch 150, the first booster valve 190 is connected with a control system signal, and the control system controls the on-off state of the third control switch 150 by controlling the on-off state of the first booster valve 190, so as to control the on-off state of the first inlet 140. Specifically, the first booster valve 190 is connected to a first booster pipe 191, a booster medium is injected into the first booster pipe 191, and the control system controls the on-off state of the first booster valve 190 to control the communication state of the first booster pipe 191 and the third control switch 150, so as to control the on-off state of the third control switch 150.

In one possible design, as shown in fig. 5 and 6, the first housing has a first mounting portion 159, and the third control switch 150 is mounted on the first mounting portion 159 and connected to the first pressure increasing valve 190. Specifically, the first mounting portion 159 is located at one side of the first inlet 140, and the sub-chamber 112 is located at the other side of the first inlet 140. The first mounting portion 159 has a mounting hole, and a communication port is provided at one end of the first mounting portion 159 near the first inlet 140, and a first mounting port is provided at one end far from the first inlet 140. The third control switch 150 extends into the mounting hole from the first mounting hole, and one end of the third control switch 150, which is close to the first inlet 140, extends out of the communication hole and abuts against the side wall of the first inlet 140, so that the third control switch 150 closes the first inlet 140. The first mounting portion 159 is mounted on the first housing to facilitate connection of the third control switch 150 to the first booster valve 190, resulting in a compact structure.

In one particular embodiment, as shown in fig. 5 and 7, third control switch 150 includes a piston valve including a piston cylinder 151, a piston 152, and a piston return 153, piston cylinder 151 having a piston chamber 1511 and a pressurization bore 1513 in communication with piston chamber 1511, first pressurization valve 190 in communication with piston chamber 1511 through pressurization bore 1513. The piston 152 and the piston return portion 153 are both installed in a piston chamber 1511 of the piston cylinder 151, both ends of the piston return portion 153 are fixedly connected with the piston 152 and an inner wall of the piston cylinder 151, respectively, and the piston 152 is slidably installed in the piston chamber 1511 of the piston cylinder 151. The piston cylinder 151 extends into the mounting hole and is fixed with respect to the mounting hole. The piston return portion 153 is made of an elastic material such as a spring or a rubber column. The pressurizing hole 1513 is located on a side of the piston 152 close to the first inlet 140, and the piston return portion 153 is located on a side of the piston 152 away from the first inlet 140. One side of the piston 152, which is close to the first inlet 140, is fixedly connected with a blocking rod 154, one end of the blocking rod 154 is provided with a blocking head 155, and the blocking head 155 is used for covering the first inlet 140. Specifically, one end of the plugging rod 154, where the plugging head 155 is not disposed, penetrates into the piston cylinder 151 and is fixedly connected with the piston 152, and the plugging head 155 covers the first inlet 140. The first pressurizing valve 190 is opened to enable pressurizing medium to enter the piston chamber 1511 through the pressurizing hole 1513, so that the piston 152 is pushed to one side far away from the first inlet 140, the piston 152 presses the piston reset portion 153 against the inner wall of the piston cylinder 151, the piston reset portion 153 is compressively deformed, the piston 152 drives the plugging rod 154 to move in a direction far away from the first inlet 140, and the plugging head 155 is further far away from the first inlet 140, so that the third control switch 150 is opened. When the first pressure increasing valve 190 is closed, the pressure increasing medium stops entering the piston chamber 1511, the piston reset portion 153 returns to deform, and the piston reset portion 153 applies elastic force to the piston 152, so that the piston 152 moves towards the direction approaching the first inlet 140, and the plugging rod 154 is driven to move towards the direction approaching the first inlet 140, so that the plugging head 155 is plugged into the first inlet 140 again.

In one possible design, the piston cylinder 151 is provided with a first through hole and a second through hole at its two ends distributed along its own axis, the diameter of the first through hole being smaller than that of the second through hole, both of which communicate with the piston chamber 1511. The piston valve further includes a connection portion 1514, during the installation process, the piston 152 and the piston reset portion 153 are sequentially installed into the piston chamber 1511 through the second through hole, and then the connection portion 1514 is fixed at the second through hole of the piston cylinder 151, and two ends of the piston reset portion 153 are fixedly connected with the piston 152 and the connection portion 1514 respectively. The first through hole is used for the plugging rod 154 to extend into the piston chamber 1511 and fixedly connect with the piston 152. The second through hole is used for the piston 152 and the piston reset portion 153 to extend into the piston cavity 1511, so that the installation is facilitated.

In one possible design, as shown in fig. 5, an end of the blocking head 155 near the first inlet 140 is provided with a conical surface, and a side of the first inlet 140 near the blocking head 155 is correspondingly provided with a conical hole, the diameter of the conical hole gradually decreases from the end near the blocking head 155 to the end far from the blocking head 155, and the conical surface of the blocking head 155 matches with the shape of the conical hole. The communication position between the second pressure increasing valve 160 and the main chamber 111 is located between the first inlet 140 and the piston cylinder 151, when the plugging head 155 covers the first inlet 140, the conical surface of the plugging head 155 is abutted against the conical hole of the first inlet 140, if the second pressure increasing valve 160 is opened, the pressurizing medium enters the main chamber 111, so that the pressure in the main chamber 111 is increased, the plugging head 155 is pushed to move towards the direction close to the first inlet 140, the plugging head 155 is in closer contact with the conical hole of the first inlet 140, the pressurizing medium is prevented from being discharged from the first inlet 140, and the reliability of pressurizing the main chamber 111 is improved. One side of the conical surface of the plugging head 155 is provided with a mounting groove 1552, the mounting groove 1552 is used for mounting a plugging sealing ring 1551, when the plugging head 155 is covered on the first inlet 140, the plugging sealing ring 1551 deforms under the extrusion of the plugging head 155 and the conical hole, so that gaps between the plugging head 155 and the conical hole are plugged, and connection tightness between the plugging head 155 and the conical hole is improved.

In one embodiment, as shown in fig. 5 and 6, the dental chair disinfection apparatus further comprises a first stop plate 156 and a first stop screw 157. The first stopper screw 157 is used to fix the first stopper plate 156 to the first mounting portion 159. Specifically, the piston cylinder 151 extends into the mounting hole, one end of the connection portion 1514 extends out of the first mounting hole, and one end of the connection portion 1514 extending out of the first mounting hole is provided with a first clamping groove 1512. The first limiting plate 156 is clamped in the first clamping groove 1512, and then the first limiting plate 156 is fixedly connected with the first mounting portion 159 through the first limiting screw 157, so that the first limiting plate 156 is covered at the first mounting opening, and the piston cylinder 151 is fixed relative to the first mounting portion 159, that is, the piston cylinder 151 is fixed relative to the mounting hole.

In one possible design, as shown in fig. 6, the outer side wall of the piston cylinder 151 is provided with a first annular protrusion 1582, and the side of the first annular protrusion 1582 remote from the piston cylinder 151 is provided with a first annular groove 1581, the first annular groove 1581 being used for mounting the first seal ring 158. When the piston cylinder 151 is located in the mounting hole, the first sealing ring 158 is located between the first annular protrusion 1582 and the inner wall of the first mounting portion 159, and the first sealing ring 158 is pressed by the first annular protrusion 1582 and the inner wall of the first mounting portion 159 to deform, so that the first sealing ring 158 seals the gap between the piston cylinder 151 and the inner wall of the first mounting portion 159, and the connection tightness between the piston valve and the first mounting portion 159 is improved. The number of the first annular protrusions 1582 may be multiple, each first annular protrusion 1582 is correspondingly provided with a first annular groove 1581, and each first annular groove 1581 is correspondingly provided with a first sealing ring 158. The plurality of first annular grooves 1581 are uniformly spaced along the axis of the piston cylinder 151 on the outer periphery of the piston cylinder 151, so that the plurality of first sealing rings 158 can be uniformly spaced along the axis of the piston cylinder 151 on the outer periphery of the piston cylinder 151, and the connection tightness between the piston valve and the first mounting portion 159 is further improved.

In one possible design, as shown in fig. 3, the first housing includes a first housing cover 103 and a first bottom case 104. The first bottom chassis 104 has a first inner cavity 313 and a first opening, and the first opening communicates with the first inner cavity 313. The first cover 103 closes the first opening such that the first inner cavity 313 is located between the first cover 103 and the first bottom case 104, and the first inner cavity 313 is the main chamber 111. The sub chamber 112 and the first mounting portion 159 are both provided on the first cover 103. The first inlet 140 is located on a side wall of the first cover 103 where the sub chamber 112 is located, and when the first cover 103 is closed to the first opening, the sub chamber 112 communicates with the main chamber 111 through the first inlet 140. The first cover 103 is fixedly connected to the first bottom case 104, and the fixed connection may be a snap connection, a screw (or bolt) connection, a threaded connection, or the like.

The first cover 103 and the first bottom case 104 are connected by bolts. Specifically, the first cover 103 is disc-shaped, the first bottom case 104 is cylindrical, and the first cover 103 and the first bottom case 104 each have a flange portion. The flange portion of the first bottom case 104 is located at an outer peripheral side wall of one end of the first bottom case 104 near the first case cover 103, and the flange portion of the first bottom case 104 is disposed coaxially with the first bottom case 104 and extends outward in the radial direction of the first bottom case 104. The flange portion of the first cover 103 is located on the outer peripheral side wall of one end of the first cover 103 near the first bottom case 104, and the flange portion of the first cover 103 is disposed coaxially with the first cover 103 and extends outward in the radial direction of the first cover 103. The flange portion of first cap 103 is provided with a plurality of first through-holes, and one side that every through-hole kept away from first drain pan all is provided with a first recess, and the opening orientation of first recess is the direction that deviates from first drain pan 104, corresponds on the flange portion of first drain pan to be provided with a plurality of second through-holes, and one side that every through-hole kept away from first cap 103 all is provided with a second recess, and the opening orientation of second recess is just in opposite with the opening orientation of first recess. The number of the bolts is multiple, one end of each bolt provided with a thread correspondingly stretches into one first groove, sequentially stretches out of the second groove through the first through hole and the second through hole, and is matched and screwed with the bolts through nuts, so that the first shell cover 103 and the first bottom shell 104 are fixed. The head of the bolt is located in the first groove, and the nut is located in the second groove, so that the bolt and the nut are located in the outer surfaces of the first shell cover 103 and the first bottom shell 104 respectively, and occupied space of the outer surfaces of the first shell cover 103 and the first bottom shell 104 is reduced. The plurality of first through holes are distributed on the flange part of the first shell cover 103 in a circular ring array shape, the plurality of second through holes are also distributed on the flange part of the first bottom shell 104 in a circular ring array shape, and the diameter of the circular ring array of the first through holes is equal to that of the circular ring array of the second through holes, so that when the first shell cover 103 is fixedly connected with the first bottom shell, each first through hole and each second through hole can be aligned. The first through holes and the second through holes are distributed in a circular ring array, so that the connection between the first shell cover 103 and the first bottom shell 104 is more stable.

In one possible design, a side wall of the first bottom shell 104 facing the first housing cover 103 is provided with an annular groove for mounting the second sealing ring 105, the diameter of the annular groove being smaller than the diameter of the circumferential array of second through holes. In the assembly process, the second sealing ring 105 is installed in the annular groove, then the first shell cover 103 is fixedly connected with the first bottom shell 104 through bolts, the second sealing ring 105 is extruded by the first shell cover 103 and the first bottom shell 104 to deform, so that a gap between the first shell cover 103 and the first bottom shell 104 is plugged by the second sealing ring 105, and the connection tightness of the first shell cover 103 and the first bottom shell 104 is improved.

In one possible design, the dental chair disinfection device further comprises a liquid storage cavity, wherein the liquid storage cavity is communicated with the liquid mixing cavity, and is used for being communicated with the water end of the dental chair; a fourth control switch is arranged between the liquid storage cavity and the liquid mixing cavity and is used for controlling the communication state of the liquid storage cavity and the liquid mixing cavity. Through setting up the stock solution chamber, can carry the mixed solution in the mixed solution chamber to the stock solution intracavity to store in the stock solution chamber, through pressurizing to the stock solution chamber, make the mixed solution in the stock solution chamber carry the water end to the dental chair. Specifically, as shown in fig. 8, the liquid storage cavity is provided with a second outlet 240, the second outlet 240 is communicated with the liquid inlet, and a liquid outlet control switch is arranged at the second outlet 240 and is used for controlling the open-close state of the second outlet 240 so as to control the communication state of the second outlet 240 and the liquid inlet. When the liquid outlet control switch is turned on, the mixed liquid in the liquid storage cavity is output to the liquid inlet hole through the second outlet 240, and the mixed liquid enters the pipeline of the dental chair and the water end connected with the pipeline through the liquid inlet hole.

In one possible design, as shown in fig. 2, the liquid storage cavity is connected with a liquid storage pressurizing pipeline, and the liquid storage pressurizing pipeline is communicated with the liquid storage cavity and is used for introducing pressurizing medium into the liquid storage cavity. Specifically, the liquid storage pressurizing pipe is connected with a third pressurizing valve 220, the third pressurizing valve 220 is connected with a third pressurizing pipe 221, pressurizing medium is injected into the third pressurizing pipe 221, and the third pressurizing valve 220 is used for controlling the conducting state of the third pressurizing pipe 221 and the liquid storage pressurizing pipe. The third booster valve 220 is connected to a control system through a signal, and the control system is further configured to control the on-off state of the third booster valve 220, so as to control the conducting state of the third booster pipe 221 and the liquid storage cavity. When the third pressure increasing valve 220 is opened, the third pressure increasing pipe 221 is communicated with the liquid storage pressure increasing pipe, and the pressure increasing medium in the third pressure increasing pipe 221 sequentially passes through the third pressure increasing valve 220 and the liquid storage pressure increasing pipe to enter the liquid storage cavity, so that the mixed liquid in the liquid storage cavity is discharged from the second outlet 240.

In one embodiment, as shown in fig. 1 and 8, the dental chair disinfection device further comprises a second housing, and the liquid storage cavity is located in the second housing. The second housing is connected with the first housing through a second mounting portion 360, the second housing has a second inlet 230 communicated with the liquid storage cavity, the second mounting portion 360 is provided with a conducting channel, and both the first outlet 170 and the second inlet 230 are communicated with the conducting channel, so that the liquid mixing cavity is communicated with the liquid storage cavity. A check valve 300 is provided between the first housing and the second housing. Specifically, the check valve 300 is disposed in the conducting channel of the second mounting portion 360, and the check valve 300 is used for allowing the mixed liquid in the main chamber 111 to enter the liquid storage chamber.

In one possible design, the first housing, the second housing, and the second mounting portion 360 may be connected by a detachable connection, or alternatively. Preferably, the first housing, the second housing and the second mounting portion 360 are integrally formed, and the tightness of the dental chair disinfection device can be further improved by adopting the integrally injection-molded structure, and the step of assembling the first housing and the second housing together can be saved, so that the assembly efficiency is improved.

In a specific embodiment, as shown in fig. 9 to 11, the check valve 300 includes a cylinder 310, a sliding portion 320, and an elastic restoring portion 330, an inner cavity 313, a liquid inlet hole 314, and a liquid outlet hole 315 are disposed in the cylinder 310, the liquid inlet hole 314 and the liquid outlet hole 315 are both in communication with the inner cavity 313, the liquid inlet hole 314 is used for communicating with the first outlet 170, and the liquid outlet hole 315 is used for communicating with the second inlet 230. The sliding portion 320 is slidably disposed in the inner cavity 313, the elastic restoring portion 330 is disposed in the inner cavity 313, and two ends of the elastic restoring portion 330 are fixedly connected with the sliding portion 320 and the inner wall of the cylinder 310, respectively. The cylinder 310 is mounted in and fixed relative to the pass-through channel. One side of the sliding portion 320 is fixedly connected to the elastic restoring portion 330, and the other side is used for covering the first outlet 170, so that the first outlet 170 is closed. When the first pressurizing valve 190 is opened, the pressurizing medium enters the main chamber 111 to increase the pressure of the main chamber 111, the mixed liquid in the main chamber 111 pushes the sliding part 320 from the first outlet 170, so that the sliding part 320 moves away from the first outlet 170, the first outlet 170 is opened, the mixed liquid sequentially passes through the first outlet 170 and the liquid inlet hole 314 to enter the inner cavity 313, and the elastic reset part 330 is compressed by deformation generated by the extrusion of the sliding part 320 and the inner wall of the cylinder 310. The mixed liquid enters the inner cavity 313 and then enters the second inlet 230 through the liquid outlet 315, and the mixed liquid enters the liquid storage cavity through the second inlet 230. When the first pressure increasing valve 190 is closed, the mixed liquid stops being discharged from the first outlet 170, that is, the mixed liquid stops pushing the sliding portion 320, the elastic reset portion 330 resumes its deformation, so as to push the sliding portion 320 to move in a direction approaching to the first outlet 170, so that the sliding portion 320 is covered on the first outlet 170 again, and the mixed liquid in the liquid storage cavity is prevented from flowing back into the mixed liquid cavity. The elastic restoring portion 330 may be a spring, a rubber column, a spring plate, or the like.

In one embodiment, as shown in fig. 12, the second mounting portion 360 is provided with a second mounting port, which communicates with the conduction path, through which the cylinder 310 extends into the conduction path. The dental chair sterilization apparatus further includes a second limiting plate 340 and a second limiting screw 350, and the cylinder body 310 is fixedly connected with the second installation part 360 by using the second limiting plate 340 and the second limiting screw 350. Specifically, one end of the cylinder 310 extends out of the second mounting opening, one end of the cylinder 310 extending out of the second mounting opening is provided with a second clamping groove 312, the second limiting plate 340 is clamped in the second clamping groove 312, and the second limiting plate 340 is fixed with the second mounting portion 360 through a second screw, so that the second limiting plate 340 covers the second mounting opening, and the cylinder 310 is fixed relative to the second mounting portion 360, that is, the cylinder 310 is fixed relative to the conducting channel.

In one possible design, the dental chair disinfection device further comprises a third sealing ring 316, the outside of the cylinder 310 being provided with a second annular groove 311, the second annular groove 311 being intended for mounting the third sealing ring 316. When the third sealing ring 316 is installed in the second annular groove 311, part of the material of the third sealing ring 316 protrudes out of the outer surface of the cylinder 310, so that when the cylinder 310 is installed in the conducting channel, the third sealing ring 316 is contacted with the inner side wall of the conducting channel and deforms under the extrusion of the inner side wall of the conducting channel and the outer side wall of the cylinder 310, thereby the gap between the cylinder 310 and the conducting channel is blocked by the third sealing ring 316, and the connection tightness of the cylinder 310 and the conducting channel is improved. The number of the second annular grooves 311 may be multiple, specifically, two second annular grooves 311 may be distributed at one end of the cylinder 310 near the second mounting port along the axis of the cylinder 310 at intervals, and each second annular groove 311 is correspondingly provided with a third sealing ring 316. By providing a plurality of second annular grooves 311 and a plurality of third seal rings 316, the connection sealability of the cylinder 310 and the conduction path is further improved.

In one possible design, as shown in fig. 9, the dental chair disinfection device further includes an elastic membrane 250, the elastic membrane 250 is located in the liquid storage cavity, the liquid storage cavity is divided into a first chamber 211 and a second chamber 212 by the elastic membrane 250, the second outlet 240 and the second inlet 230 are both communicated with the second chamber 212, the mixed liquid in the main chamber 111 enters the second chamber 212 after passing through the liquid inlet control switch, and the liquid storage pressurizing pipeline is communicated with the first chamber 211. When the third pressure increasing valve 220 is opened, the pressurizing medium sequentially passes through the third pressure increasing valve 220 and the liquid storage pressure increasing pipe to enter the first chamber 211 to pressurize the first chamber 211. The pressure of the first chamber 211 increases such that the elastic diaphragm 250 deforms and protrudes toward the second chamber 212, thereby making the volume of the first chamber 211 larger, and the volume of the second chamber 212 smaller, such that the pressure in the second chamber 212 increases, thereby discharging the mixed liquid in the second chamber 212 from the second outlet 240. The provision of the elastic membrane 250 can prevent the pressurizing medium from directly contacting the mixed liquid in the second chamber 212, so as to prevent contamination of the mixed liquid in the second chamber 212; and because the elastic membrane 250 separates the pressurizing medium from the mixed liquid, the pressure in the second chamber 212 is gradually increased by pressurizing the elastic membrane 250, so that the mixed liquid in the second chamber 212 is more stable to output. The elastic membrane 250 is made of an elastic material such as a rubber material, a soft plastic material, or a resin material.

In one possible design, the second housing includes a second housing cover 201 and a second bottom case 202, the second bottom case 202 having a second interior cavity 313 and a second opening, the second interior cavity 313 and the second opening communicating. In the assembly process, the elastic membrane 250 is laid outside the second opening of the second bottom case 202 such that the elastic membrane 250 covers the second opening, and then the second case cover 201 is covered outside the elastic membrane 250 to press the peripheral edge of the elastic membrane 250 against the first bottom case 104 through the first case cover 103.

In one embodiment, as shown in fig. 9, a first boss is disposed on a side wall of the second housing cover 201 near the second bottom case 202, the first boss is annular, and the first boss surrounds an edge of the side wall of the second housing cover 201. A side wall of the first boss, which is far away from the second casing cover 201, is provided with a second boss, the second boss is annular, the first boss and the second boss are coaxially arranged, and the outer diameter of the first boss is larger than that of the second boss. When the first cover 103 is mounted on the first bottom case 104, the second boss protrudes into the first inner cavity 313 earlier than the first boss. The second bottom shell 202 is provided with a mounting platform, which is located in the second inner cavity 313 and protrudes from the inner side wall of the second bottom shell 202. The mounting platform may in particular be annular and distributed circumferentially along the axis of the second inner cavity 313. In the assembly process, the elastic membrane 250 is laid outside the second opening of the second bottom case 202, and the first boss is inserted into the first inner cavity 313, so that the second case cover 201 is limited relative to the second bottom case 202. After the first boss is inserted into the first inner cavity 313, the second boss presses the elastic diaphragm 250 against the mounting platform, so that the elastic diaphragm 250 is fixed. A gap is formed between the outer side wall of the second boss and the inner side wall of the second bottom shell 202, when the second boss presses the elastic membrane 250 on the mounting platform, the outer peripheral edge of the elastic membrane 250 is located in the gap, the outer peripheral edge of the elastic membrane 250 is extruded by the outer side wall of the second boss and the inner side wall of the second bottom shell 202 to deform, so that the gap between the outer side wall of the second boss and the inner side wall of the second bottom shell 202 is blocked by the outer peripheral edge of the elastic membrane 250, and the tightness between the second bottom shell 202 and the second shell cover 201 is improved. After the first boss extends into the second inner cavity 313 and the second boss compresses the elastic membrane 250 on the mounting platform, the second housing cover 201 and the second housing cover 202 are screwed by the screw, so that the second housing cover 202 and the second housing cover 201 are fixed, and the elastic membrane 250 is fixed between the second housing cover 202 and the second housing cover 201. The chamber formed between the second cover 201 and the elastic membrane 250 is a first chamber 211, and the chamber formed between the elastic membrane 250 and the second bottom case 202 is a second chamber 212. By extending the first boss into the first inner cavity 313, alignment between the second bottom shell 202 and the second shell cover 201 is facilitated, thereby improving assembly efficiency. By providing the second boss, the second boss presses the outer peripheral edge of the elastic membrane 250 onto the inner sidewall of the second bottom shell 202, so that the connection stability of the elastic membrane 250 is better.

In one possible design, as shown in fig. 8 and 9, the dental chair disinfection apparatus includes a pressure detector 260, the pressure detector 260 is in communication with the second chamber 212, the pressure detector 260 is used for detecting the pressure in the second chamber 212, the pressure detector 260 is in signal connection with a control system, and the control system is further used for controlling the opening and closing states of the second booster valve 160 and the third booster valve 220 according to the pressure value fed back by the pressure detector 260. The pressure detector 260 may be a pressure switch or a pressure sensor or the like that may detect the pressure of the surrounding environment. The pressure detector 260 may be a pressure switch or a pressure sensor.

The following control system controls the opening and closing states of the second booster valve 160 and the third booster valve 220 according to the pressure values on the premise that the liquid level in the main chamber 111 is higher than the minimum liquid level value. In one embodiment, the control system controls the second pressurization valve 160 to close if the level of the fluid in the main chamber 111 reaches or is less than the first minimum level, regardless of the pressure in the second chamber 212. The control system is preset with a maximum pressure value and a minimum pressure value. When the pressure value is greater than the minimum pressure value and less than the maximum pressure value, the control system controls the second pressurizing valve 160 to open, continuously delivering the mixed liquid in the main chamber 111 to the second chamber 212, and increasing the liquid in the second chamber 212, so that the pressure in the second chamber 212 also gradually increases, and thus the mixed liquid in the second chamber 212 can be output from the second outlet 240. When the pressure value reaches the maximum pressure value, the control system controls the second pressure increasing valve 160 to be closed, the third pressure increasing valve 220 to be opened, that is, the pressure in the main chamber 111 is stopped, the mixed liquid is stopped to be input into the second chamber 212, the pressure in the first chamber 211 is started to be input, the mixed liquid in the second chamber 212 is continuously output from the liquid outlet end of the liquid storage, until the pressure value reaches or is lower than the minimum pressure value, the control system controls the third pressure increasing valve 220 to be closed, and controls the second pressure increasing valve 160 to be opened, so that the mixed liquid in the main chamber 111 is continuously conveyed to the second chamber 212.

In one possible design, as shown in fig. 1 and 2, the dental chair disinfection apparatus further comprises a sound attenuation box 510 and a sound attenuation duct. The silencing pipes include a sub silencing pipe 520 and a main silencing pipe 530, and the number of the sub silencing pipes 520 is plural. Specifically, as shown in fig. 1, the number of the sub-muffler pipes 520 is three, and one sub-muffler pipe 520 is connected to each of the first, second, and third pressure-increasing valves 190, 160, 220. The dental chair sterilizing apparatus further includes a communicating box, and three sub-silencing pipelines 520 are all communicated with the communicating box, and two ends of the main silencing pipeline 530 are respectively communicated with the silencing box 510 and the communicating box, so that the first booster valve 190, the second booster valve 160, and the third booster valve 220 are communicated with the silencing box 510. The sound deadening box 510 is provided with a flexible substance for absorbing part of sound generated by the flow of the pressurizing medium when the first, second, and third pressurizing valves 190, 160, and 220 are opened. Taking the first booster valve 190 as an example, when the first booster valve 190 is opened, part of the pressurized medium in the first booster pipe 191 flows into the sub-silencing pipe 520 and finally enters the silencing box 510, at least one outlet is formed on any side surface of the silencing box 510, and the pressurized medium enters the silencing box 510, passes through the flexible material and finally is discharged from the outlet. The flexible material may be a sponge block, foam or cotton.

In one possible design, the control system includes a controller, which may include a circuit board, chip, or the like. The dental chair sterilizing apparatus further includes a protection case 610, and the controller is installed in the protection case 610, the protection case 610 protecting the circuit board.

In one embodiment, the dental chair disinfection apparatus further comprises a mount 600, the mount 600 being configured to mount the first bottom shell 104 and the second bottom shell 202. The protection case 610, the sound deadening case 510, and the like are disposed on the upper surface of the second case cover 201, and the first pressure increasing valve 190, the second pressure increasing valve 160, and the third pressure increasing valve 220 are disposed on the upper surface of the first case cover 103. By mounting the protection case 610, the sound deadening case 510, the first booster valve 190, the second booster valve 160, and the third booster valve 220 on the upper surfaces of the first case cover 103 and the second case cover 201, respectively, the space above the first case cover 103 and the second case cover 201 is effectively utilized, and the structure is made compact, and the space occupation is small. By mounting the first and second bottom cases 104 and 202 on the mounting base 600, the entire disassembly and assembly of the dental chair sterilization apparatus is facilitated, and the mounting efficiency is improved.

The embodiment also provides a dental chair, which comprises a dental chair disinfection device. The dental chair sterilization apparatus includes a first housing, a first control switch 120, a second control switch 130, a control system, and a height detection structure. The first housing has a liquid mixing chamber, and the first housing is provided with a first liquid inlet end 101 and a second liquid inlet end 102 which are communicated with the liquid mixing chamber. The first control switch 120 is installed between the first liquid inlet 101 and the first housing, and is used for controlling the communication state between the first liquid inlet 101 and the liquid mixing cavity. The second control switch 130 is installed between the second liquid inlet 102 and the first housing, and is used for controlling the communication state between the second liquid inlet 102 and the liquid mixing cavity; the control system is respectively connected with the first control switch 120 and the second control switch 130 in a signal manner (the signal connection can be through a data line connection or a wireless connection, etc.), and the control system is used for controlling the on-off state of the first control switch 120 and the second control switch 130. The height detection structure is in signal connection with the control system, and the height detection structure is used for detecting the height of the dental chair, and the control system is also used for adjusting the on-off states of the first control switch 120 and the second control switch 130 according to the height of the dental chair fed back by the height detection structure. Because the dental chair disinfection device can automatically prepare disinfectant, the degree of automation is higher, so that the degree of automation of the dental chair is also relatively higher.

In one embodiment, the dental chair comprises a liquid inlet, a pipeline and a water end, wherein two ends of the pipeline are respectively connected with the liquid inlet and the water end. The quantity of the pipelines can be multiple, the multiple pipelines are respectively connected with a water use end, and one ends of the multiple pipelines are finally gathered at the liquid inlet hole and are communicated with the liquid inlet hole. In an alternative embodiment, the second outlet 240 is connected to the liquid inlet of the dental chair, so that the disinfectant in the second chamber 212 flows through the pipes to the water ends after entering the liquid inlet through the second outlet 240, to disinfect the pipes of the dental chair and the water ends connected to the pipes.

The above embodiments are merely optional examples of the present application, and are not intended to limit the present application, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present application should be included in the scope of the present application.

Claims

1. A dental chair disinfection apparatus, comprising:

the first shell is provided with a first inlet, and at least one of the first liquid inlet end and the second liquid inlet end is communicated with the liquid mixing cavity through the first inlet; the dental chair disinfection device comprises a third control switch, wherein the third control switch is arranged at the first inlet and is used for controlling the opening and closing states of the first inlet, and the third control switch is in signal connection with the control system;

the first shell is connected with a second pressure increasing valve, the second pressure increasing valve is connected with a second pressure increasing pipeline, a pressure increasing medium is injected into the second pressure increasing pipeline, and the second pressure increasing valve is used for controlling the communication state of the second pressure increasing pipeline and the liquid mixing cavity;

the dental chair disinfection device further comprises a liquid storage cavity, wherein the liquid storage cavity is communicated with the liquid mixing cavity, the liquid storage cavity is communicated with the water end of the dental chair, a fourth control switch is arranged between the liquid storage cavity and the liquid mixing cavity and used for controlling the communication state of the liquid storage cavity and the liquid mixing cavity, the liquid storage cavity is connected with a liquid storage pressurizing pipeline, and the liquid storage pressurizing pipeline is used for leading pressurizing medium into the liquid storage cavity.

2. The dental chair disinfection device of claim 1, further comprising a height detection structure for detecting a dental chair height; the height detection structure is in signal connection with the control system, and the control system is used for adjusting the opening and closing states of the first control switch and the second control switch according to the height of the dental chair fed back by the height detection structure.

3. The dental chair disinfection apparatus of claim 2, wherein the height detection structure comprises a lift adjustment motor for controlling the lift of the dental chair, the lift adjustment motor being in signal connection with the control system, the control system controlling the on-off states of the first control switch and the second control switch according to a lift adjustment amount fed back by the lift adjustment motor.

4. The dental chair disinfection device according to claim 1, further comprising a first liquid level sensor, wherein the first liquid level sensor is installed in the liquid mixing cavity and is in signal connection with the control system, the first liquid level sensor is used for detecting the liquid level in the liquid mixing cavity, and the control system controls the opening and closing states of the first control switch and the second control switch according to liquid level information fed back by the first liquid level sensor.

5. The dental chair disinfection device of claim 1, further comprising a reservoir bottle connected to the first liquid inlet end, the reservoir bottle for storing a first liquid.

6. The dental chair disinfection device of claim 5, wherein a second liquid level sensor is disposed in the liquid storage bottle, the second liquid level sensor being configured to detect a liquid level in the liquid storage bottle, the control system being in signal connection with the second liquid level sensor.

7. The dental chair disinfection apparatus of claim 1, wherein the liquid mixing chamber comprises a main chamber and a secondary chamber, the first liquid inlet end and the second liquid inlet end each being in communication with the secondary chamber, the secondary chamber being in communication with the main chamber through the first inlet.

8. The dental chair disinfection device of claim 1, further comprising a first booster valve, wherein the first booster valve is in signal connection with the third control switch, wherein the first booster valve is in signal connection with the control system, and wherein the control system controls the on-off state of the third control switch by controlling the on-off state of the first booster valve, thereby controlling the on-off state of the first inlet.

9. The dental chair disinfection device of claim 7, wherein the dental chair disinfection device further comprises a second housing and an elastic membrane; the liquid storage cavity is positioned in the second shell, the fourth control switch comprises a one-way valve, the one-way valve is arranged between the first shell and the second shell, and the one-way valve is used for allowing mixed liquid in the main cavity to enter the liquid storage cavity; the liquid storage pressurizing pipeline is connected with a third pressurizing valve, the third pressurizing valve is connected with a third pressurizing pipeline, pressurizing medium is injected into the third pressurizing pipeline, and the third pressurizing valve is used for controlling the conduction state of the third pressurizing pipeline and the liquid storage pressurizing pipeline; the elastic diaphragm is located the stock solution intracavity, and the elastic diaphragm separates the stock solution chamber into first cavity and second cavity, and the mixed solution of main cavity passes through in the check valve back gets into the second cavity, stock solution booster line and first cavity intercommunication.

10. A dental chair comprising a dental chair disinfection apparatus as claimed in claim 1, said dental chair disinfection apparatus comprising:

the height detection structure is in signal connection with the control system, the height detection structure is used for detecting the height of the dental chair, and the control system is also used for adjusting the opening and closing states of the first control switch and the second control switch according to the height of the dental chair fed back by the height detection structure.