Pipeline sterilization equipment applicable to microgravity environment

Abstract

The invention provides pipeline sterilization equipment applicable to a microgravity environment, which comprises a peristaltic pump, a sterilization water bag, a connecting pipeline and a main machine for driving the peristaltic pump, an inlet of the peristaltic pump is connected with a water outlet end of the sterilization water bag through the connecting pipeline, and an outlet of the peristaltic pump is connected with a water inlet of a to-be-sterilized pipeline through the connecting pipeline. The water inlet end of the sterilization water bag is connected with a water outlet of a pipeline to be sterilized through a connecting pipeline, and the water pumping flow speed of the peristaltic pump is switched between 20ml / min and 200ml / min. The peristaltic pump extrudes the pipeline to provide power, so that the sterilization liquid in the sterilization water bag circularly flows in the to-be-sterilized pipeline, and the water pumping flow speed of the peristaltic pump is switched between 20ml / min and 200ml / min, so that the water flow speed is changed, the water flow in the sterilization water path can form disordered turbulent flow, the full contact between the sterilization liquid and the to-be-sterilized pipeline is improved, and the sterilization effect of the to-be-sterilized pipeline is improved. Therefore, the effect of efficiently sterilizing and disinfecting the pipeline is achieved in a microgravity environment.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline sterilization, and in particular to a pipeline sterilization device suitable for a microgravity environment. Background Art

[0002] Due to the inherent humid and closed environment of the water dispenser pipe, bacteria are easily bred inside the pipe, which is harmful to human health. Therefore, the water dispenser pipe needs to be sterilized and disinfected regularly. The current pipe sterilization method is mainly the sterilization liquid disinfection method, which uses a booster pump to pump the sterilization liquid into the pipe for circulation, thereby achieving pipe sterilization.

[0003] In the microgravity environment of aerospace, liquids will float or become a liquid-vapor mixture, causing air blockage inside the booster pump or working pipeline, making it unable to work normally, interrupting the liquid flow circulation of the sterilization liquid and affecting the sterilization effect of the water dispenser pipeline. Summary of the invention

[0004] In order to solve the problem of sterilizing the pipes of a water dispenser when the liquid is in a floating state or a liquid-gas mixed state in a microgravity environment, the present invention proposes a pipe sterilizing device suitable for a microgravity environment, the sterilizing device comprising a peristaltic pump, a sterilizing water bag, a connecting pipeline and a main unit driving the peristaltic pump; the inlet of the peristaltic pump is connected to the water outlet end of the sterilizing water bag through the connecting pipeline, the outlet of the peristaltic pump is connected to the water inlet of the water dispenser through the connecting pipeline, the water inlet end of the sterilizing water bag is connected to the water outlet of the water dispenser through the connecting pipeline, and the water pumping flow rate of the peristaltic pump (9) is switched between 20ml / min and 200ml / min.

[0005] Preferably, the connecting pipeline includes a first fluid circuit disconnector connected to the outlet of the peristaltic pump, and the first fluid circuit disconnector is connected to the water inlet of the water dispenser.

[0006] Preferably, the sterilizing water bag includes a water bag body, a water outlet water pipe and a water inlet water pipe; one end of the water outlet water pipe is connected to the water outlet end of the water bag body, and one end of the water inlet water pipe is connected to the water inlet end of the water bag body.

[0007] Preferably, the other ends of the water outlet pipe and the water inlet pipe are respectively connected with Luer connectors.

[0008] Preferably, the water pipe at the water inlet end is provided with a Luer connector cap.

[0009] Preferably, a one-way valve is provided at the water inlet end of the sterilizing water bag.

[0010] Preferably, the one-way valve is disposed in the water bag body and connected to the water pipe at the water inlet end.

[0011] Preferably, a stop valve is provided on the water pipe at the water outlet.

[0012] Preferably, the peristaltic pump is connected in parallel with an on-off valve.

[0013] Preferably, the host comprises a motor and a controller, and the controller is used to adjust the water pumping flow rate of the peristaltic pump.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention provides a pipeline sterilization equipment suitable for a microgravity environment. A peristaltic pump is used as a power source to drive the sterilization liquid in a sterilization water bag to circulate in the pipeline to be sterilized, so as to sterilize and disinfect the pipeline. Since the peristaltic pump can drive the medium to flow when the working medium is in a floating state or a liquid-gas mixed state, and at the same time, the pumping water flow rate of the peristaltic pump is switched between 20ml / min and 200ml / min, the water flow rate changes, and the water flow in the sterilization water channel can form chaotic turbulence, thereby improving the full contact between the sterilization liquid and the pipeline to be sterilized, thereby achieving efficient sterilization and disinfection of the pipeline to be sterilized in a microgravity environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall connection of the sterilization equipment of the present invention;

[0017] Figure 2 It is a schematic diagram of the piping of the sterilization equipment of the present invention;

[0018] Figure 3 It is a front view of the external structure of the sterilization device of the present invention;

[0019] Figure 4 A top view of the external structure of the sterilization device of the present invention;

[0020] Figure 5 It is a left view of the external structure of the sterilization device of the present invention;

[0021] Figure 6 This is a schematic diagram of the pipe connection between the sterilization device of the present invention and the water dispenser;

[0022] Figure 7 This is a schematic diagram of the structure of the sterilizing water bag of the sterilizing equipment of the present invention;

[0023] Figure 8 A front view of the external structure of the peristaltic pump of the sterilization device of the present invention;

[0024] Fig. 9 It is a left view of the external structure of the peristaltic pump of the sterilization equipment of the present invention;

[0025] Fig.10 A three-dimensional design schematic diagram of the connection between the sterilization device of the present invention and the water dispenser;

[0026] Fig.11 A three-dimensional diagram of a peristaltic pump of the sterilization device of the present invention;

[0027] Fig.12 A front view of a peristaltic pump of the sterilization device of the present invention;

[0028] Fig.13 A bottom view of a peristaltic pump of the sterilization device of the present invention;

[0029] Fig.14 It is a left view of the peristaltic pump of the sterilization device of the present invention;

[0030] Fig.15 A schematic diagram of the host circuit of the peristaltic pump of the sterilization device of the present invention;

[0031] Fig.16 It is a schematic diagram of a 5-speed speed regulation circuit of a motor of a peristaltic pump of the sterilization equipment of the present invention;

[0032] Fig.17 The sterilization liquid performance test result of the sterilization device of the present invention;

[0033] Figure numerals: 1, one-way valve; 2, Luer connector; 3, Luer connector cap; 4, water outlet pipe; 5, stop valve; 6, first liquid circuit disconnector; 7, adapter; 8, sterilizing water bag; 9, peristaltic pump; 10, power connector; 11, switch button; 12, second liquid circuit disconnector; 13, on-off valve; 14, three-way pipe; 15, knob; 16, spring clip; 17, housing; 18, pump head; 19, inlet Water end water pipe; 20, water outlet manual valve; 21, main unit; 22, water inlet; 23, water outlet; 24, flow sensor; 25, water inlet solenoid valve; 26, cleaning manual valve; 27, water inlet check valve; 28, heating tube; 29, temperature measuring component; 30, water outlet solenoid valve; 31, water inlet manual valve; 32, filter; 33, gear position; 34, power supply; 40, water dispenser; 50 drinking water sterilization device pipeline. DETAILED DESCRIPTION

[0034] Embodiment 1:

[0035] This embodiment provides a pipeline sterilization device, such as Figure 1 As shown, the sterilization device includes a peristaltic pump 9, a sterilization water bag 8, a connecting pipeline, and a host 21 for driving the peristaltic pump 9; the inlet of the peristaltic pump 9 is connected to the water outlet of the sterilization water bag 8 through the connecting pipeline, the outlet of the peristaltic pump 9 is connected to the water inlet 22 of the water dispenser through the connecting pipeline, and the water inlet of the sterilization water bag 8 is connected to the water outlet 23 of the water dispenser through the connecting pipeline. The sterilization water bag 8 contains sterilization liquid, and the peristaltic pump 9 is used to drive the sterilization liquid in the sterilization water bag 8 to circulate in the water dispenser pipeline under the control of the host 21.

[0036] In this embodiment, the outlet water pressure of the peristaltic pump 9 is controlled at 10kPa~100kPa, so that the outlet water pressure is greater than the flow resistance pressure of the internal pipeline of the water dispenser (about 5kPa), ensuring that the sterilization liquid pumped out by the peristaltic pump 9 can smoothly flow into the internal pipeline of the water dispenser for sterilization in a microgravity environment.

[0037] The water pumping flow rate of the peristaltic pump 9 is switched between 20ml / min and 200ml / min, so that the water flow rate changes. The water flow in the sterilization water channel can form chaotic turbulence, which improves the full contact between the sterilization liquid and the water dispenser pipe, thereby achieving efficient sterilization and disinfection of the water dispenser pipe in a microgravity environment.

[0038] The sterilization device is used for sterilizing the internal pipes of water dispensers and is widely used. It can be used for sterilizing the pipes of water dispensers, beverage machines, and small water dispensers. Periodically or when the microorganisms in the water dispenser exceed the standard, the two ends of the sterilization device are respectively connected to the water inlet 22 and the water outlet 23 of the water dispenser, and the sterilization liquid in the sterilization water bag is circulated in the pipe through the peristaltic pump 9 to sterilize and disinfect the pipe.

[0039] In this embodiment, the sterilization device is used for sterilization and disinfection of the water dispenser. The piping principle diagram of the sterilization device is as follows: Figure 2 As shown, the connection relationship diagrams of the drinking water sterilization device pipeline 50 and the drinking water machine 40 are respectively as shown in Figure 1 and Figure 6 As shown, the three-dimensional design schematic diagram of the connection between the sterilization device and the water dispenser 40 is as shown Fig.10As shown. The water dispenser is sequentially installed with a flow sensor 24, a water inlet solenoid valve 25, a cleaning manual valve 26, a water inlet check valve 27, a heating tube 28, a temperature measuring component 29 and a water outlet solenoid valve 30 from the water inlet 22 to the water outlet 23, wherein the water inlet solenoid valve 25 is connected in parallel with a water inlet manual valve 31, the cleaning manual valve 26 is connected in parallel with a filter 32, and the water outlet solenoid valve 30 is connected in parallel with a water outlet manual valve 20. The water outlet 23 of the water dispenser is connected to the water inlet end of the sterilizing water bag 8 through the adapter 7, the water outlet end of the sterilizing water bag 8 is connected to the inlet of the peristaltic pump 9 through a hose, the outlet of the peristaltic pump 9 is connected to one end of the first liquid circuit disconnector 6 through a hose, the water inlet 22 of the water dispenser is provided with a second liquid circuit disconnector 12, and the other end of the first liquid circuit disconnector 6 is connected to the second liquid circuit disconnector 12, thereby connecting the sterilization device with the water inlet 22 of the water dispenser. The function of the liquid circuit breaker is to provide an interface for the rapid connection or disconnection of the fluid. When the first liquid circuit breaker 6 is connected to the second liquid circuit breaker 12, the fluid is in a circulation state. When the first liquid circuit breaker 6 is disconnected from the second liquid circuit breaker 12, the fluid is in a non-circulation state, and the ports of the two liquid circuit breakers are immediately closed to prevent the fluid from overflowing. In this embodiment, the specification of the first liquid circuit breaker 6 is DJQ4-T-1, and the specification of the second liquid circuit breaker 12 is DJQ4-Z-3. After the connection is completed, start the peristaltic pump 9, and the sterilization liquid can circulate in the water dispenser and the sterilization device. The flow direction is from the adapter 7 to the first liquid circuit breaker 6. The hoses on both sides of the peristaltic pump 9 can be made of silicone tubes to prevent the tubes from breaking and facilitate bending. The silicone tube used in this embodiment has an inner diameter of 4.5 mm and an outer diameter of 8 mm. The front view, top view and left view of the external structure of the sterilization equipment are respectively shown as follows. Figure 3 , Figure 4 and Figure 5 shown.

[0040] In addition to being suitable for sterilizing the internal pipes of various water dispensers under conventional conditions, this sterilization equipment is also suitable for sterilizing the pipes of aerospace drinking water equipment. In the microgravity environment of aerospace, the temperature, pressure and other conditions of the liquid will change, causing the liquid to vaporize, the air dissolved in the liquid will precipitate, or the external air will enter the pipe due to the loose sealing of the pipe, so the fluid inside the pipe will be in a state of gas-liquid mixture. The peristaltic pump can reduce the possibility of bubbles in the liquid by replacing the hose, reducing the pump operating pressure, and increasing the pump speed. Measures such as reducing the possibility of bubbles in the liquid can prevent the peristaltic pump from being affected by the microgravity environment, so that the sterilization equipment can still work normally in the aerospace environment and ensure the sterilization effect of the water dispenser pipe.

[0041] Because the flow rate cannot be simulated under weightlessness, different gears can be designed to adjust the power of the peristaltic pump and the flow rate of the sterilizing liquid to ensure that the sterilizing liquid can flow to every corner of the internal pipeline of the water dispenser under weightlessness. The inlet and outlet of the peristaltic pump 9 are respectively connected to the water outlet of the sterilizing water bag 8 and the first liquid circuit breaker 6, and the host 21 of the peristaltic pump 9 is connected to the power supply, and a controller is provided to implement power adjustment of the peristaltic pump 9 at different gears.

[0042] The peristaltic pump 9 of this embodiment uses a voltage of DC12V, a current of 0.5-0.7A, a maximum pump flow of 200ml / min, a pump tube life of 1000 hours, a rotation speed of 400r / min (stepless speed regulation), a weight of 240.6g, and a maximum water pressure of 380kPa (blocking the water outlet). The pump tube material of the peristaltic pump is a composite rubber hose, which is non-cytotoxic and hemolytic, resistant to ozone and UV rays, heat-resistant, acid-resistant, resistant to aging and oxidation, long-life, and has an operating temperature range of -51°C to 132°C. When the water inlet pressure of the main peristaltic pump is 0kPa, the water outlet pressure can be adjusted, and the adjustment range does not exceed (10-60)kPa.

[0043] The appearance of the peristaltic pump is as follows Figure 8 and Fig. 9 As shown, in order to reduce the volume and weight of the product as much as possible, the peristaltic pump 9 is fixed with a housing 17, the pump head 18 is fixed to one side of the housing 17, the power interface 10, the switch button 15 and the knob 15 are fixed to the housing 17, and the circuit board is connected to the knob, as shown in FIG. Fig.11 As shown. The material of the shell 17 is preferably aluminum alloy, such as 2A12. The minimum fillet of the shell 17 is designed to be R5mm to prevent scratches. In this embodiment, the size of the host is designed to be 118.6×100×80mm, which meets the design requirements of 118±5×100±5×80±5mm. A spring clip 16 is designed on the shell 17, and the host can be clipped to the handle of the water dispenser when in use, which is convenient for one-handed operation.

[0044] The peristaltic pump has a manual squeezing function. When the peristaltic pump fails, the sterilizing water bag 8 can be squeezed manually to make the disinfecting water circulate in the internal pipeline of the water dispenser to complete the disinfection. The inlet and outlet of the pump head 18 are respectively provided with a three-way pipe 14, and a 45cm long silicone tube with an inner diameter of 4.5mm and an outer diameter of 8mm is connected between the two three-way pipes 14. The silicone tube is provided with an on-off valve 13, such as a POM plastic manual valve. When working normally, the on-off valve 13 is in a closed state. When the peristaltic pump fails, the on-off valve 13 is opened, and the sterilizing water bag 8 is manually squeezed to squeeze the sterilizing liquid into the water dispenser to achieve sterilization. It is also possible to disconnect the inlet of the sterilization equipment and the water outlet 23 of the water dispenser, connect a water injection adapter and a sterilization water bag 8 to the water outlet 23 of the water dispenser, and connect the sterilization water bag 8 to the end of the silicone tube connected to the on-off valve 13, open the stop valve 5 of the sterilization water bag 8, and manually squeeze the sterilization water bag 8 to squeeze the sterilization liquid into the water dispenser to achieve sterilization.

[0045] like Fig.15 As shown, the electronic control design of the host 21 is to design two fuses in parallel at the power input. The fuse adopts the chip type, and the fuse specifications are as follows: Fig.13 As shown, its characteristics comply with RoHS certification (EU standard "Restriction of the use of certain hazardous substances in electrical and electronic equipment"), lead-free, halogen-free, fast response, compact design, low resistance, small size, compatible with high temperature solder, plug and play. Fig.16 The circuit diagram of the motor is shown in the figure. The motor adopts 5-speed speed regulation and is powered by a 12V DC power adapter. The power supply interface is a 12VDC power jack. The jack size is 5.5mm*2.5mm. The inside of the hole is +12V and the outside of the hole is connected to GND (wire ground terminal). The front view, bottom view and left view of the peristaltic pump 9 are shown in the figure below. Fig.12 , Fig.13 and Fig.14 As shown, the three-dimensional image is Fig.11 As shown, the main body of the peristaltic pump 9 is provided with a power connector 10, a switch button 11 and a knob 15, and the pump body is provided with a manual valve 13 and a three-way pipe 14.

[0046] The components list of the peristaltic pump is shown in Table 6.

[0047] Table 6 Peristaltic pump components list

[0048] Serial number Label Specification Devices Dosage 1 C1 105 capacitance 1 2 F1,F2 1.5A 24V Self-recovery insurance 2 3 R1,R2 2.2Ω2W Power resistor 2 4 R4, R6, R7, R8, R9 470Ω resistance 5 5 R5 5.1kΩ resistance 1 6 R10,R11 1kΩ resistance 2

[0049] The sterilizing water bag 8 is designed to be replaceable. After one sterilization, the sterilizing water bag 8 is removed and replaced with a new sterilizing water bag 8 for the next sterilization. Figure 7As shown, the sterilizing water bag 8 includes a water bag body, a water outlet pipe 4 and a water inlet pipe 19. The water outlet pipe 4 is connected to the water outlet of the water bag body and communicates with the inside of the water bag body. The water inlet pipe 19 is connected to the water inlet of the water bag body and communicates with the inside of the water bag body. In this embodiment, the water outlet pipe 4 and the water inlet pipe 19 are both designed as PVC water pipes with an inner diameter of 5 mm.

[0050] The water bag body is made of medical grade PVC / 5401E, which is the material used for infusion bags and can meet the water dispenser standard. The water bag body is used to hold the sterilizing liquid, with a designed volume of 900ml, a length of (250±10)mm, and a width of (130±10)mm. A one-way valve 1 is provided at the water inlet end of the sterilizing water bag 8, so that the sterilizing liquid flows from the water inlet G1 of the sterilizing water bag 8 to the water outlet G2 in one direction. Figure 7 As shown. The one-way valve 1 can be arranged inside or outside the water bag body. When the one-way valve 1 is arranged outside the water bag body, its inlet end is connected to the water inlet end water pipe 19, and its outlet end is connected to the water bag body. When the one-way valve 1 is arranged inside the water bag body, the water inlet end water pipe 19 is inserted into the water bag body, and the one-way valve 1 is connected to the end of the water inlet end water pipe 19 located inside the water bag body. The one-way valve 1 can be replaced by a one-way membrane.

[0051] When the sterilization device is working, the sterilization liquid flows in from the water inlet end of the sterilization water bag 8, passes through the one-way valve 1, and flows out from the water outlet end of the sterilization water bag 8. The water outlet end of the sterilization water bag 8 is provided with a stop valve 5, which can be a manual stop valve, which is installed on the water pipe 4 at the water outlet end. Before the sterilization water bag 8 is disassembled, the liquid flow can be cut off by adjusting the manual stop valve to prevent the sterilization liquid from spilling during the disassembly process.

[0052] The ends of the water pipe 4 at the water outlet and the water pipe 19 at the water inlet are respectively provided with Luer connectors 2, and the water pipe 19 at the water inlet is also provided with a Luer connector cap 3. The Luer connector 2 is a detachable component, which is divided into a male and a female. When replacing the sterilizing water bag, close the stop valve 5, rotate and untie the Luer connectors 2 on both sides of the sterilizing water bag 8, and screw on the Luer connector cap 3 at the water inlet.

[0053] The current types of disinfectants include liquid chlorine (including chlorine gas, hypochlorous acid, hypochlorite and bleaching powder), sodium dichloroisocyanurate, trichloroisocyanuric acid and chlorine dioxide. Among them, sodium dichloroisocyanurate and trichloroisocyanuric acid are explicitly prohibited by the National Health Commission for disinfection of drinking water; chlorine gas and hypochlorite are unstable and inconvenient to store; chlorine dioxide is widely used in drinking water disinfection, and chlorine dioxide effervescent tablets are available for easy storage, so chlorine dioxide is selected as a disinfectant.

[0054] Chlorine dioxide is an inorganic compound with the chemical formula ClO2. It is a yellow-green to orange-yellow gas at room temperature and pressure. It is mainly used for bleaching of pulp and paper, fiber, wheat flour, starch, refining and bleaching of oils, beeswax, etc., and disinfection and sterilization of drinking water. ClO2 can destroy the glucose oxidase of microorganisms, making them unable to participate in redox activities and causing metabolic disorders of cells. ClO2 can also undergo redox reactions with some amino acids in bacteria, causing the amino acids to decompose and destroy, thereby controlling protein synthesis and ultimately causing bacterial death.

[0055] Chlorine dioxide is easily soluble in water (2.8g / 100ml) and is not easily hydrolyzed. It exists in the form of molecules in water. At low concentrations (below 10mg / L), its bactericidal and disinfecting abilities are mainly carried out in an oxidative manner, which is different from chlorine gas sterilization and disinfection, which is carried out in an electron transfer manner. Therefore, ClO2 can be highly effective in sterilization and disinfection within a wide pH range (2-10) and is absolutely harmless to the human body.

[0056] The chlorine dioxide solubility and sterilization time recommended by GB2636-2010 "Hygiene Standard for Chlorine Dioxide Disinfectants" are shown in Table 1. The sterilization object of the water dispenser sterilization equipment is the internal pipeline of the water dispenser, which complies with the processing pipelines and equipment of the water dispenser. Therefore, the chlorine dioxide solubility of the sterilization liquid is designed to be 100-150 mg / L, and the sterilization time is designed to be 10-20 minutes.

[0057] Table 1 GB2636-2010 "Hygiene Standard for Chlorine Dioxide Disinfectants"

[0058]

[0059]

[0060] Chlorine dioxide solution is not easy to store for a long time. The industry uses chlorine dioxide effervescent tablets to dissolve in water to prepare chlorine dioxide solution. The test report of the chlorine dioxide effervescent disinfection tablets used in this embodiment after sterilizing drinking water meets the "Standards for Hygiene and Safety Evaluation of Drinking Water Disinfectants and Disinfection Equipment (Trial)" (2005). The test results are detailed in Fig.17 The effervescent tablets used by the troops should also meet military standards.

[0061] The mass of one chlorine dioxide effervescent tablet used in this embodiment is 1±0.1g, and the size is φ11×5.8mm. The manufacturer's nominal concentration of chlorine dioxide in the sterilized water prepared by dissolving one chlorine dioxide effervescent tablet in 1L of water is 100mg / L. Take a 0.9639g chlorine dioxide effervescent tablet and dissolve it in 1L of pure water to test the chlorine dioxide concentration of 97mg / L. The test data are shown in Table 2. Considering the mass deviation of the tablets, it is designed to dissolve one chlorine dioxide effervescent tablet in 0.9L of pure water to prepare a chlorine dioxide sterilization solution, and the chlorine dioxide concentration in the sterilization solution is 100-122mg / L.

[0062] Table 2 Chlorine dioxide concentration test results

[0063]

[0064] In this embodiment, 300 ml of water is stored in the internal pipeline of the water dispenser, so the sterilization device of the water dispenser is designed to hold 600 ml of water.

[0065] In this embodiment, the sterilizing liquid is chlorine dioxide sterilizing liquid. Before the water bag body is produced and welded, a chlorine dioxide effervescent tablet is placed in the bag. When in use, the stop valve 5 is closed first, and 600 ml of water is taken from the water dispenser to dissolve the chlorine dioxide effervescent tablet. The dissolution time is about 5 minutes. The composition table of the chlorine dioxide effervescent tablet used is shown in Table 3:

[0066] Table 3 Ingredients of Chlorine Dioxide Effervescent Tablets

[0067] Serial number Raw material name 1 Sodium chlorite 2 Magnesium sulfate 3 Sodium Percarbonate 4 Sodium sulfate 5 Sodium bisulfate

[0068] The dissolution time of chlorine dioxide effervescent tablets is 5 minutes. The process of dissolving chlorine dioxide effervescent tablets into water to produce chlorine dioxide is as follows: sodium chlorite + sodium bisulfate + water → chlorous acid + sodium sulfate; chlorous acid → chlorine dioxide + hypochlorous acid + water. From the above chemical formula, it can be seen that the sterilization water produced by chlorine dioxide effervescent tablets is acidic. The actual measurement shows that the pH value of 1 chlorine dioxide effervescent tablet dissolved in 1L of water is 3.6. Therefore, after sterilization, it is necessary to flush the water dispenser pipeline with pure water to raise the pH to the pH value of 5 to 8.5 specified in the "HTY Drinking Water Hygiene Requirements".

[0069] The materials of the various parts of the sterilization equipment are selected from materials resistant to chlorine dioxide corrosion, such as silicone, rubber, polyvinyl chloride PVC, polyoxymethylene POM, polypropylene PP, and titanium alloy. The corrosion resistance of the sterilization equipment and the water dispenser can be tested by a corrosion resistance life test. The specific test method is to immerse all materials in contact with water in the water dispenser and the sterilization equipment in a solution with a chlorine dioxide solubility of 120 mg / L for a corrosion resistance life test. The conventional indicators and requirements of disinfectants in drinking water are in accordance with the provisions of the "GB5749-2006 Drinking Water Hygiene Standard", as shown in Table 4, where the concentration of chlorine dioxide in drinking water shall not exceed 0.8 mg / L. The chlorine dioxide solution is yellow-green, and chlorine dioxide has a pungent odor. The sensory evaluation results of chlorine dioxide at different concentrations are shown in Table 5. It can be seen that there is no odor and color when the chlorine dioxide concentration is 0.8 mg / L. The solution with a chlorine dioxide solubility of 0.8 mg / L has a measured pH value of 6.35, which meets the requirements.

[0070] Table 4 Limits of chlorine dioxide concentration in drinking water

[0071]

[0072] Table 5 Sensory evaluation of chlorine dioxide solution

[0073]

[0074] The sterilizing water bag 8 is filled with a disinfecting tablet that can be used to disinfect the drinking water pipeline. The disinfecting water generated by the dissolution of the disinfecting tablet should be able to effectively kill various bacteria and fungi and be easy to flush. After flushing, the water output of the drinking machine meets the "GB5749-2006 Drinking Water Hygiene Standard". The sterilizing liquid performance test results of the sterilizing equipment are as follows: Fig.17 shown.

[0075] The main technical indicators of the sterilization equipment in this embodiment are:

[0076] a. Weight of a single set of water dispenser sterilization equipment: ≯1.2kg;

[0077] b. Dimensions of the main unit of the water dispenser sterilization equipment: (118±5)mm*(100±5)mm*(80±5)mm;

[0078] c. Device power consumption: The product adopts 12V DC power supply, power consumption ≯15W;

[0079] d. Leakage rate: The product leakage rate is tested by the bubble method with a pressure of 0.1MPa (pressure difference). The pressure is maintained for 5 minutes and there should be no bubbles.

[0080] When using the sterilization equipment to sterilize the pipeline, the chlorine dioxide effervescent tablet is dissolved in the sterilization water bag 8 in advance to prepare the sterilization liquid. The sterilization water bag 8 is a consumable item, and one sterilization water bag 8 is used for each sterilization. The Luer connector is a detachable component. When replacing the sterilization water bag 8, close the stop valve 5, rotate and untie the Luer connector 2 connected to the two ends of the sterilization water bag 8, and screw on the Luer connector cap 3 at the water inlet end. The peristaltic pump 9 is used to drive the sterilization liquid to circulate and sterilize the water dispenser. After disinfection, the sterilization water bag 8 is discarded, and the water dispenser can be used normally after being rinsed.

[0081] After the water dispenser sterilization device sterilizes the water dispenser, it needs to be rinsed with pure water, and the rinsing liquid is collected in a flushing water bag. After the flushing is completed, the flushing water is poured into the toilet for recycling and purification. The chemical composition of the liquid in the flushing water bag in this embodiment is shown in Table 7.

[0082] Table 7 Chemical composition of flushing fluid

[0083] Serial number Raw material name weight 1 Sodium chlorite <0.3 mg 2 Magnesium sulfate ＜0.1g 3 Sodium Percarbonate ＜0.1g 4 Sodium sulfate ＜0.1g 5 Sodium bisulfate ＜0.1g 6 Chlorine dioxide <0.6 mg

[0084] The chlorine dioxide concentration in the drinking water after flushing is required to be less than 0.8 mg / L. The chlorine dioxide concentration of less than 0.8 mg / L meets the upper limit of chlorine dioxide concentration specified in the "GB5749-2006 Drinking Water Hygiene Standard", has no odor and color, and the chlorine dioxide concentration is less than 0.8 mg / L.

[0085] The sterilization equipment of this embodiment combines the fourth-generation water dispenser pipeline disinfectant chlorine dioxide with mechanical equipment, and uses a peristaltic pump to circulate the chlorine dioxide disinfectant water in the pipelines of the water dispenser, beverages, etc., to achieve the effect of full sterilization and disinfection. The advantage of using a peristaltic pump is that it provides power by squeezing the pipeline, does not enter the circulation path itself, reduces secondary pollution, and is convenient for cleaning. Chlorine dioxide has a good disinfection effect and little residue. Using chlorine dioxide tablets as a disinfectant for sterilization equipment is safe, reliable, and easy to store. The sterilization equipment is widely used and can be used for water dispensers, beverage machines, small water dispenser pipeline disinfection, etc., and the disinfectant circulation speed can be adjusted according to the type of product that needs to be disinfected.

[0086] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A pipeline sterilization device suitable for a microgravity environment, characterized in that: The sterilization equipment comprises a peristaltic pump (9), a sterilization water bag (8), a connecting pipeline and a main unit driving the peristaltic pump (9); the inlet of the peristaltic pump (9) is connected to the water outlet of the sterilization water bag (8) through the connecting pipeline, the outlet of the peristaltic pump (9) is connected to the water inlet of the pipe to be sterilized through the connecting pipeline, the water inlet of the sterilization water bag (8) is connected to the water outlet of the pipe to be sterilized through the connecting pipeline, and the water pumping flow rate of the peristaltic pump (9) is switched between 20 ml / min and 200 ml / min.

2. The pipeline sterilization equipment according to claim 1, characterized in that: The connecting pipeline comprises a first liquid circuit disconnector (6) connected to the outlet of the peristaltic pump (9), and the first liquid circuit disconnector (6) is connected to the water inlet of the pipeline to be sterilized.

3. The pipeline sterilization equipment according to claim 2, characterized in that: The sterilizing water bag (8) comprises a water bag body, a water outlet water pipe (4) and a water inlet water pipe (19); one end of the water outlet water pipe (4) is connected to the water outlet end of the water bag body, and one end of the water inlet water pipe (19) is connected to the water inlet end of the water bag body.

4. The pipeline sterilization equipment according to claim 3, characterized in that: The other ends of the water outlet pipe (4) and the water inlet pipe (19) are respectively connected with Luer connectors.

5. The pipeline sterilization equipment according to claim 4, characterized in that: The water inlet end water pipe (15) is provided with a Luer connector cap (3).

6. The pipeline sterilization equipment according to claim 5, characterized in that: A one-way valve (1) is provided at the water inlet end of the sterilizing water bag (8).

7. The pipeline sterilization equipment according to claim 6, characterized in that: The one-way valve (1) is arranged in the water bag body and is connected to the water inlet end water pipe (19).

8. The pipeline sterilization equipment according to claim 3, characterized in that: A stop valve (5) is provided on the water outlet water pipe (4).

9. The pipeline sterilization equipment according to claim 1, characterized in that: The peristaltic pump (9) is connected in parallel with an on-off valve.

10. The pipeline sterilization equipment according to claim 1, characterized in that: The host comprises a motor and a controller, and the controller is used to adjust the water pumping flow rate of the peristaltic pump (9).

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