A water supply system and water supply method for dental comprehensive treatment table

Abstract

The present invention discloses a water supply system and method for a dental comprehensive treatment table. The water supply system includes: a filter, a mixer, a three-way solenoid valve, an electrolytic cell, and a pH online monitor. When the pH value of the cathode side outlet water is monitored to be lower than 11.0, the signal is automatically fed back to the control unit, the peristaltic pump is automatically turned on, and sodium carbonate is added to the mixer to increase the conductivity of the inlet water, thereby increasing the pH value of the cathode side electrolytic outlet water; the acidic and alkaline electrolyzed water produced after electrolysis enter the water storage barrel respectively, and are connected to the system outlet end through the water pump. After the water supply system is installed, a. drain the water in the dental comprehensive treatment table pipeline; b. use alkaline electrolyzed water to soak the dental chair water supply pipeline at night; c. use acidic electrolyzed water for uninterrupted water supply during daily diagnosis and treatment; d. after the biofilm in the dental chair water supply pipeline is completely removed, use acidic electrolyzed water for continuous water supply to inhibit the growth of biofilm in the dental chair water supply pipeline.

Description

Technical Field

[0001] The invention belongs to the field of medical disinfection, relates to the underwater concentration of dental acid electrolysis water, and specifically relates to a dental comprehensive treatment table water supply system and a water supply method. Background Art

[0002] The dental unit waterline (DUWL) is an important part of the dental chair unit. Its main function is to provide water source and provide treatment water for treatment equipment such as mobile phones and three-way guns during treatment to play a cooling and flushing role.

[0003] DUWL is composed of narrow and slender tubes, which are easily contaminated by bacteria and colonized and form biofilms. During the treatment process, the colonies colonized in DUWL are often washed down by water flow. These bacteria can enter the patient's mouth with the water flow, or be inhaled into the respiratory tract by patients or dental medical staff through aerosols generated by ultrasonic scalers and high-speed turbine handpieces, thus causing infection; therefore, DUWL contamination is considered to be one of the important ways to cause dental cross-infection.

[0004] In 1963, British dentist Blake first reported on DUWL contamination and found that DUWL contained a large number of bacteria. The study found that after a new dental comprehensive treatment table was connected to the water supply pipe for one week, the bacterial concentration in the water supply pipe could reach 2×10 5 CFU / mL. After long-term use, the bacterial concentration can reach up to 1.0×10 6 CFU / mL.

[0005] According to available data, my country began to pay attention to the pollution problem of DUWLs in 2006. In the past ten years, 28 provinces / cities / regions have investigated the pollution of waterways in comprehensive oral treatment tables, covering nearly 300 hospitals and more than 1,000 dental chairs in 11 provinces. Data show that the total number of colonies in mouthwash water in dental clinics using tap water as a water source is as high as 90,000 CFU / mL, and the total number of colonies in dental handpieces is as high as 100,000 CFU / mL. In 2017, Su Jing, a teacher at the Beijing Stomatological Hospital affiliated to Capital Medical University, conducted a survey of the dental departments of 60 tertiary dental hospitals in a certain area, showing that among the 120 water samples of dental handpieces in comprehensive oral treatment tables, the qualified rate was only 15%; among the 118 water samples of dental scalers, the qualified rate was only 18%.

[0006] At present, it is generally recognized that the main reasons for water pollution in dental comprehensive treatment tables are: first, the water source of the dental comprehensive treatment table has not been effectively disinfected; second, biofilm is easily formed on the wall of the water channel of the dental comprehensive treatment table, which contaminates the pipe; third, the pollution caused by the back suction of diagnostic and treatment equipment such as turbines (mobile phones) during operation. Therefore, the key to solving the water channel pollution of dental comprehensive treatment tables is to remove the biofilm inside the pipe and to continuously inhibit bacteria in the pipe.

[0007] The water pollution of comprehensive dental treatment tables has attracted more and more attention, and its treatment methods are divided into two categories: physical and chemical methods.

[0008] Commonly used physical methods and their advantages and disadvantages are as follows:

[0009]

[0010] Commonly used chemical methods and their advantages and disadvantages are as follows:

[0011]

[0012] In 2015, Professor Su Jing from the Affiliated Stomatological Hospital of Capital Medical University began to conduct relevant research on "Observation on the effect of slightly acidic electrolyzed water on water line disinfection of comprehensive oral treatment tables". For the first time, the feasibility of using slightly acidic electrolyzed water for DUWLs pollution control was verified, and significant results were achieved.

[0013] However, although acidic electrolyzed water (including acidic oxidizing potential water and slightly acidic electrolyzed water) has a significant effect in solving the problem of water contamination in dental comprehensive treatment tables, it also causes new problems.

[0014] (1) Corrosiveness. Acidic electrolyzed water contains a high concentration of hypochlorous acid (10-80ppm), which can corrode the dental chair PU and PU pipes;

[0015] (2) Raw material transportation and storage. The production of acidic electrolyzed water uses hydrochloric acid as the electrolysis raw material, which poses risks during transportation and storage;

[0016] (3) Biofilm removal rate. The main component of biofilm is phospholipid bilayer. Acidic electrolyzed water has a poor effect on the removal of biofilm, while studies have shown that alkaline electrolyzed water has a better effect on the removal of biofilm.

[0017] Therefore, in order to solve the above problems, new methods are needed to solve the problem of excessive microorganisms in the water outlet of dental water supply pipelines. Summary of the invention

[0018] Based on the above problems, the present invention proposes a water supply system and method for a dental comprehensive treatment table, which mainly solves the problems of long-term excessive microorganisms in the water outlet of the dental water supply pipeline and the adverse effects of the existing acidic electrolyzed water supply method on the pipeline.

[0019] To this end, the present invention adopts the following technical means:

[0020] Firstly, a water supply system for a comprehensive dental treatment table is proposed, which includes a water inlet system and a water outlet system, and also includes an electrolyte delivery system and an electrolysis system. The electrolyte delivery system uses a sodium carbonate solution as an electrolyte, which is mixed with the water inlet system in proportion and then enters the electrolysis system for electrolysis to generate acidic electrolyzed water and alkaline electrolyzed water respectively; the acidic electrolyzed water is used for dental diagnosis and treatment or antibacterial treatment of pipelines, and the alkaline electrolyzed water is used for removing biofilms inside pipelines.

[0021] Furthermore, the electrolysis system comprises an electrolytic cell, wherein the chloride ion content of the water entering the electrolytic cell is C 0 ≥100ppm, conductivity σ≥600μS / cm, and the effective volume V (in L) of the electrolytic cell (6), the electrolysis current I (in A), the electrolysis time t (in s), the current efficiency The Faraday electrolysis constant F (unit: C / mol), the electrochemical reaction electron coefficient n, and the Faraday constant F (value: 96485 C / mol) should satisfy the following relationship:

[0022]

[0023] Furthermore, the electrolyte delivery system and the water inlet system are mixed in proportion and then enter the electrolysis system, wherein the mixing in proportion needs to meet the following conditions:

[0024]

[0025] The outlet flow rate of the electrolyte delivery system is u 1 , the water flow rate of the water inlet system is u 2 , pH adjustment coefficient is k, pH value of alkaline electrolyzed water is x 1 , after mixing in proportion, the pH value of alkaline electrolyzed water is x 2 .

[0026] In addition, the water inlet system includes a water inlet pipeline, on which a filter, a mixer and a three-way solenoid valve are sequentially connected;

[0027] The electrolyte delivery system comprises a peristaltic pump and a sodium carbonate solution storage barrel, wherein the peristaltic pump extracts the sodium carbonate solution in the sodium carbonate solution storage barrel and mixes the solution in proportion through a mixer and a water inlet pipeline;

[0028] The water outlet of the three-way solenoid valve enters the electrolytic cell for electrolysis to produce acidic electrolyzed water and alkaline electrolyzed water respectively;

[0029] The water outlet system comprises a water outlet pipeline, on which a first solenoid valve and a second solenoid valve are arranged, which are used to control the outlet of acidic electrolyzed water and alkaline electrolyzed water respectively.

[0030] On this basis, the dental comprehensive treatment table water supply system also includes a pH online monitoring system and a control system. The pH online monitoring system is connected to the cathode side water outlet pipeline of the electrolytic cell (6). When the pH value of the cathode side water outlet is detected to be lower than 11.0, the signal is automatically fed back to the control system, the peristaltic pump (3) is automatically turned on, and the sodium carbonate solution is added to the mixer (2).

[0031] The pH value of the alkaline electrolyzed water in the electrolysis system of the present invention is between 11.0 and 12.0; the pH value of the acidic electrolyzed water is between 5.0 and 6.5, and the effective chlorine concentration is 1 to 5 ppm.

[0032] Preferably, the electrolytic cell (6) comprises a platinum anode, a cathode and an ion membrane.

[0033] At the same time, the present invention also provides a water supply method for a dental comprehensive treatment table. When the water is supplied according to the above system, when the pH value of the alkaline electrolyzed water outlet is lower than 11.0, the peristaltic pump (3) is turned on and a sodium carbonate solution with a volume fraction of 5% is added to the water;

[0034] The peristaltic pump supplies 5% sodium carbonate solution at a flow rate u 1 and the inlet flow rate u 2 , pH adjustment coefficient k, original alkaline electrolyzed water effluent pH value x 1 , pH value of alkaline electrolyzed water after adjustment x 2 , the following relationship should be satisfied:

[0035]

[0036] 2 After the system produces acidic electrolyzed water and alkaline electrolyzed water respectively, the acidic electrolyzed water is introduced into the original water supply pipeline of the dental comprehensive treatment table for continuous water supply, which is used for daily dental oral diagnosis and treatment or continuous antibacterial treatment of pipelines, and the alkaline electrolyzed water is used to remove the biofilm inside the pipeline.

[0037] Compared with the prior art, the present invention has the following technical effects:

[0038] 1. The water supply method adopted by the present invention does not use sodium chloride or hydrochloric acid as daily consumables, thus avoiding the risks of transportation and storage.

[0039] 2. Sodium carbonate is used as the electrolyte. The acidic electrolyzed water contains a low concentration of hypochlorous acid (1-5ppm), which will not cause corrosion to the dental chair PU and PU pipes.

[0040] 3. Although the acidic electrolyzed water produced by the method of the present invention contains a low concentration of hypochlorous acid (1-5 ppm), it can effectively kill a large number of bacteria in a short period of time.

[0041] 4. Sodium carbonate is used as the electrolyte, and the alkaline electrolyzed water produced can quickly remove the biofilm formed inside the pipeline for a long time. Then low-concentration acidic electrolyzed water is used to inhibit bacteria in the pipeline. While reducing the pipeline corrosion problem caused by high-concentration acidic electrolyzed water, it can also play a long-term antibacterial role.

[0042] 5. In addition, the water storage tank will contain some un-electrolyzed water. At this time, the acidic electrolyzed water in the water storage tank will directly sterilize this part of tap water to jointly ensure the sanitary quality of the output water. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 Schematic diagram of the system of the present invention.

[0044] The meaning of the symbols in the figure is:

[0045] 1. Filter, 2. Mixer, 3. Peristaltic pump, 4. Sodium carbonate solution storage tank, 5. Three-way solenoid valve, 6. Electrolyzer, 7. First water storage tank, 8. pH monitoring system, 9. Control unit, 10. Second water storage tank, 11. First solenoid valve, 12. Second solenoid valve, 13. Water pump. DETAILED DESCRIPTION

[0046] It should be noted that the “first” and “second” mentioned in the present invention, unless otherwise specified, are only used to distinguish different structures with the same function, and it should be understood that they are not other limitations on the present invention.

[0047] The control unit described in the present invention mainly performs feedback regulation control and solenoid valve control. Specifically, when the pH value of the cathode side outlet water is monitored to be lower than 11.0, the signal is automatically fed back to the control system to control the automatic start of the peristaltic pump and add sodium carbonate solution to the mixer, wherein the mixing ratio is controlled according to the relationship proposed in the present invention. Ordinary programmers in this field can implement this control function, or directly purchase existing control chip products, such as the XMT626F intelligent valve position feedback regulator.

[0048] The following embodiments are only used to assist in explaining the technical solutions of the present invention. Other equivalent variations made on this basis are essentially the same and belong to the protection scope of the present invention.

[0049] Embodiment 1:

[0050] The present embodiment provides a water supply system for a comprehensive dental treatment table, including a water inlet system and a water outlet system, and also including an electrolyte delivery system and an electrolysis system. The electrolyte delivery system uses a sodium carbonate solution as an electrolyte, which is mixed with the water inlet system in proportion and then enters the electrolysis system for electrolysis to produce acidic electrolyzed water and alkaline electrolyzed water respectively; the acidic electrolyzed water is used for dental diagnosis and treatment or pipeline antibacterial, and the alkaline electrolyzed water is used to remove biofilms inside pipelines.

[0051] Specifically, the electrolysis system includes an electrolytic cell 6, which includes a platinum anode, a cathode and an ion membrane. The chloride ion content of the water entering the electrolytic cell 6 is C 0 ≥100ppm, conductivity σ≥600μS / cm, and the effective volume V (in L) of the electrolytic cell 6, the electrolysis current I (in A), the electrolysis time t (in s), the current efficiency The Faraday electrolysis constant F (unit: C / mol), the electrochemical reaction electron coefficient n, and the Faraday constant F (value: 96485 C / mol) should satisfy the following relationship:

[0052]

[0053] Furthermore, the electrolyte delivery system and the water inlet system are mixed in proportion and then enter the electrolysis system, wherein the mixing in proportion needs to meet the following conditions:

[0054]

[0055] The outlet flow rate of the electrolyte delivery system is u 1 , the water flow rate of the water inlet system is u 2 , pH adjustment coefficient is k, pH value of alkaline electrolyzed water is x 1 , after mixing in proportion, the pH value of alkaline electrolyzed water is x 2 , where x 2 The value of should be less than 11.0, x 2 The value should be less than 12.0.

[0056] When this system is applied, the above two points can ensure that the effective chlorine concentration of the effluent acidic electrolyzed water is at a low concentration.

[0057] More specifically, the water inlet system includes a water inlet pipeline, on which a filter 1, a mixer 2 and a three-way solenoid valve 5 are sequentially connected; the filter 1 is used to remove particulate matter in the inlet water, and one end of the mixer 2 is connected to a sodium carbonate solution storage tank 4 through a peristaltic pump 3;

[0058] The electrolyte delivery system includes a peristaltic pump 3 and a sodium carbonate solution storage tank 4. The peristaltic pump 3 extracts the sodium carbonate solution in the sodium carbonate solution storage tank 4 and mixes it with the water in the water inlet pipeline in proportion through the mixer 2.

[0059] The three-way solenoid valve 5 adopts a one-inlet and two-outlet structural design, one end of the outlet is connected to the electrolytic cell 6, and the other end is connected to the first water storage tank 7; part of the outlet water will enter the electrolytic cell 6 for electrolysis to produce acidic electrolyzed water and alkaline electrolyzed water respectively;

[0060] The water outlet system comprises a water outlet pipeline, on which a first solenoid valve 11 and a second solenoid valve 12 are arranged, which are used to control the outlet of acidic electrolyzed water and alkaline electrolyzed water respectively.

[0061] On this basis, the dental comprehensive treatment table water supply system also includes a pH online monitoring system 8 and a control system 9. The pH online monitoring system 8 is connected to the cathode side water outlet pipeline of the electrolytic cell 6. When the pH value of the cathode side water outlet is detected to be lower than 11.0, the signal is automatically fed back to the control system 9, and the peristaltic pump 3 is automatically turned on to add sodium carbonate solution to the mixer 2 to increase the conductivity of the inlet water, thereby increasing the pH value of the cathode side electrolysis water outlet;

[0062] The alkaline electrolyzed water produced after electrolysis enters the first water storage tank 7, and the acidic electrolyzed water enters the second water storage tank 10; they are respectively connected to the first solenoid valve 12 and the second solenoid valve 11, and are connected to the water outlet of the system through the water pump 13. The pH value of the alkaline electrolyzed water of the electrolysis system of the present invention is between 11.0-12.0; the pH value of the acidic electrolyzed water is between 5.0-6.5, and the effective chlorine concentration is 1-5ppm.

[0063] Preferably, the electrolytic cell (6) comprises a platinum anode, a cathode and an ion membrane.

[0064] More preferably, the cathode and anode in the electrolytic cell are titanium-based platinum-plated electrodes.

[0065] Embodiment 1:

[0066] This embodiment more specifically describes the water supply method of the present invention when the system is applied. It includes the following steps: After the water supply system is installed,

[0067] a. Drain the water from the dental unit pipes;

[0068] b. Use alkaline electrolyzed water to soak the water supply pipe of the dental chair at night;

[0069] c. Acidic electrolyzed water is used for uninterrupted water supply during daily diagnosis and treatment;

[0070] d. After the biofilm in the dental chair water supply pipe is completely removed, acidic electrolyzed water is used for continuous water supply to inhibit the growth of biofilm in the dental chair water supply pipe.

[0071] This water supply method is different from the traditional dental comprehensive treatment table water channel using high-concentration acid electrolyzed water for intermittent disinfection, which can continuously ensure that the total number of bacterial colonies in the water outlet of the pipeline is ≤100CFU / mL

[0072] Effect verification:

[0073] We selected dental chairs and water supply lines that had been installed for 5 years as the test targets, and tested the total number of colonies in the mouthwash, three-way guns and dental handpiece water of 6 dental chairs at 8:00 am for three consecutive days. The test results are as follows:

[0074] Table 1 Bacterial contamination of water samples from different water outlets of dental comprehensive treatment table

[0075]

[0076] From the fourth day, the dental comprehensive treatment table water supply system and water supply method described in this application were adopted, and the specific implementation method was as follows: the chloride ion content C of the water entering the electrolytic cell 0 =170ppm, conductivity σ≥945μS / cm, the effective chlorine concentration of the acidic electrolyzed water produced is 3ppm, the pH value is 5.70, and the pH value of the alkaline electrolyzed water produced is 11.6.

[0077] After 19:00 on the fourth day. a. Connect alkaline electrolyzed water to the centralized water supply of the dental chair, open the mouthwash outlet of the dental comprehensive treatment table until the alkaline electrolyzed water flows out, then close the mouthwash outlet to allow the alkaline electrolyzed water to soak the water supply pipeline; b. Before the opening of the clinic on the fifth day, discharge the alkaline electrolyzed water, and use acidic electrolyzed water for continuous water supply after the start of diagnosis and treatment; c. Repeat the above process until the total number of colonies at the water outlet of the mouthwash, dental handpiece and three-way gun is ≤100CFU / mL; d. Use acidic electrolyzed water for continuous water supply to inhibit the growth of biofilm in the water supply pipeline of the dental chair.

[0078] Table 2 Bacterial contamination of water samples at different water outlets of dental comprehensive treatment table after using the water supply method described in this patent

[0079]

[0080] After 19:00 on the 20th day, the total number of colonies in the mouthwash of the dental chair, the three-way gun and the water from the dental handpiece was measured. The results showed that there was almost no difference from the test results on the eighth day, proving that the use of the system of the present invention and the water supply method of the present invention can achieve a long-term antibacterial effect.

Claims

1. A dental comprehensive treatment table water supply system, including a water inlet system and a water outlet system, characterized in that: It also includes an electrolyte delivery system and an electrolysis system. The electrolyte delivery system uses a sodium carbonate solution as an electrolyte, which is mixed with a water inlet system in a certain proportion and then enters the electrolysis system for electrolysis to produce acidic electrolyzed water and alkaline electrolyzed water with low effective chlorine concentration respectively. The acidic electrolyzed water is passed into the original water supply pipeline of the dental comprehensive treatment table for continuous water supply, and the alkaline electrolyzed water is used to remove the biofilm inside the pipeline; The electrolysis system comprises an electrolytic cell, the chloride ion content of the water in the electrolytic cell is C0≥100ppm, the conductivity σ≥600μS / cm, and the effective volume V (in L) of the electrolytic cell (6), the electrolysis current I (in A), the electrolysis time t (in s), the current efficiency φ, the Faraday electrolysis constant F (in C / mol), the electrochemical reaction electron coefficient n, and the Faraday constant F (whose value is 96485C / mol) should satisfy the following relationship: ； The electrolyte delivery system and the water inlet system are mixed in proportion and then enter the electrolysis system, wherein the mixing in proportion needs to meet the following requirements: ； The outlet flow rate of the electrolyte delivery system is u1, the inlet flow rate of the water inlet system is u2, the pH adjustment coefficient is k, the original outlet pH value of the alkaline electrolyzed water is x1, and the pH value of the alkaline electrolyzed water after mixing in proportion is x2; The pH value of the alkaline electrolyzed water of the electrolysis system is between 11.0 and 12.0; the pH value of the acidic electrolyzed water is between 5.0 and 6.5, and the effective chlorine concentration is 1 to 5 ppm; The water inlet system comprises a water inlet pipeline, on which a filter, a mixer and a three-way solenoid valve are sequentially connected; The electrolyte delivery system comprises a peristaltic pump and a sodium carbonate solution storage barrel, wherein the peristaltic pump extracts the sodium carbonate solution in the sodium carbonate solution storage barrel and mixes the solution in proportion through a mixer and a water inlet pipeline; The water outlet of the three-way solenoid valve enters the electrolytic cell for electrolysis to produce acidic electrolyzed water and alkaline electrolyzed water respectively; The water outlet system comprises a water outlet pipeline, on which a first solenoid valve and a second solenoid valve are arranged, respectively used to control the outlet of acidic electrolyzed water and alkaline electrolyzed water; The alkaline electrolyzed water produced after electrolysis enters the first water storage tank, and the acidic electrolyzed water enters the second water storage tank; the first water storage tank and the second water storage tank are respectively connected to the first solenoid valve and the second solenoid valve, and are connected to the water outlet of the system through a water pump.

2. The dental comprehensive treatment table water supply system according to claim 1, characterized in that: The dental comprehensive treatment table water supply system also includes a pH online monitoring system and a control system. The pH online monitoring system is connected to the water outlet pipeline on the cathode side of the electrolytic cell. When the pH value of the water outlet on the cathode side is monitored to be lower than 11.0, the signal is automatically fed back to the control system, the peristaltic pump is automatically turned on, and the sodium carbonate solution is added to the mixer.

3. The dental comprehensive treatment table water supply system according to claim 1, characterized in that: The electrolytic cell comprises a platinum anode, a cathode and an ion membrane.

4. A method for supplying water to a dental comprehensive treatment table, characterized in that: When the system according to claim 1 supplies water, when the pH value of the alkaline electrolyzed water outlet is lower than 11.0, a sodium carbonate solution with a volume fraction of 5% is added to the water inlet system; Among them, the flow rate u1 and the water inlet flow rate u2 of the peristaltic pump supplying 5% sodium carbonate solution, the pH adjustment coefficient k, the original alkaline electrolyzed water outlet pH value x1, and the adjusted alkaline electrolyzed water pH value x2 should satisfy the following relationship: 。 5. The water supply method for a dental comprehensive treatment unit according to claim 4, characterized in that: After the system according to claim 1 produces acidic electrolyzed water and alkaline electrolyzed water respectively, the acidic electrolyzed water is introduced into the original water supply pipeline of the dental comprehensive treatment table for continuous water supply, and the alkaline electrolyzed water is used to remove the biofilm inside the pipeline.

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