A liquid alcohol solution detection and concentration compensation device

Abstract

The utility model discloses a liquid alcohol solution detects and concentration compensation device for solving the problem of the normal use of the instrument disinfection in prior art because of the decrease of liquid alcohol concentration. The utility model discloses a disinfection warehouse, sample collection unit and alcohol storage jar, and the disinfection warehouse is linked with sample collection unit, is equipped with alcohol detection module on sample collection unit, the alcohol storage jar is linked with disinfection warehouse, and alcohol detection module is connected with the controller. The utility model can measure alcohol solution of different concentrations, and whether automatic compensation is selected when the alcohol solution concentration is reduced, and the proper alcohol is automatically injected into the solution after simple mathematical calculation. The concentration compensation can be carried out at the same time of concentration measurement, and the solution concentration can be effectively used for a long time.

Description

Technical Field

[0001] This utility model relates to the field of liquid alcohol solution detection technology, and in particular to a liquid alcohol solution detection and concentration compensation device. Background Technology

[0002] Alcohol is commonly used as a disinfectant. When sterilizing large quantities of medical devices, they can be immersed in an alcohol solution repeatedly. However, due to alcohol's volatile nature, prolonged immersion, the introduction of other substances, and the removal of some alcohol solution upon removal, the true concentration of the alcohol solution becomes unclear after a period of use. Continuing to use this solution without knowing its true concentration can lead to decreased disinfection effectiveness. To maintain the specified alcohol concentration, concentration compensation is necessary. Liquid alcohol solutions below 70% are ineffective at killing bacteria, while concentrations above 80% rapidly coagulate bacterial surface proteins, reducing permeability. Concentrations ≤68% or ≥82% require immediate adjustment.

[0003] Compensating for the concentration of alcohol solutions used for disinfecting medical devices requires a rigorous and scientific operating procedure to ensure that an effective disinfection concentration range of 75% ± 5% is consistently maintained. This is typically achieved by directly measuring the solution concentration using a calibrated alcohol meter or refractometer. If the concentration is too low, higher concentration alcohol is added; if the concentration is too high, distilled water or sterile pure water is added. Automated solution preparation systems can reduce human error and are suitable for large medical facilities.

[0004] Utility model patent application number 202420468134.5 discloses an alcohol solution concentration detection device, comprising: a housing, a temperature sensor, an alcohol sensor, a motherboard, and an external connector. The housing includes a base and a top cover connected to the base. The temperature sensor and alcohol sensor are mounted on the base, with the temperature sensor positioned to one side of the alcohol sensor. The motherboard is installed inside the housing, and the external connector is mounted on the top cover. The motherboard is electrically connected to the external connector, the alcohol sensor, and the temperature sensor. This utility model, by inserting the alcohol sensor into the liquid being tested, senses the alcohol and detects its concentration. The temperature sensor detects the temperature of the liquid, allowing for real-time response to changes in alcohol concentration based on temperature variations. The detected data can be transmitted to an industrial control computer via the external connector, enabling rapid on-site application. However, this concentration detection device requires on-site use and cannot compensate for alcohol concentration changes. Utility Model Content

[0005] To address the shortcomings of the aforementioned background technology, this utility model proposes a liquid alcohol solution detection and concentration compensation device, solving the problem in the prior art where a decrease in liquid alcohol concentration affects the normal use of instrument disinfection. This utility model can measure alcohol solutions of different concentrations. When the alcohol solution concentration decreases, it allows for automatic compensation, automatically injecting an appropriate amount of alcohol into the solution after simple mathematical calculations. Concentration compensation can be performed simultaneously with concentration measurement, ensuring the long-term effective use of the solution concentration.

[0006] The technical solution of this utility model is implemented as follows: a liquid alcohol solution detection and concentration compensation device includes a disinfection chamber, a sample collection unit and an alcohol storage tank. The disinfection chamber is connected to the sample collection unit, and the sample collection unit is equipped with an alcohol detection module. The alcohol storage tank is connected to the disinfection chamber, and the alcohol detection module is connected to a controller.

[0007] Preferably, the disinfection chamber is connected to the sample collection unit via a first water pump, and the alcohol storage tank is connected to the disinfection chamber via a second water pump. Both the first and second water pumps are connected to a controller.

[0008] Preferably, the disinfection chamber is provided with a first conduit and a second conduit. The disinfection chamber is connected to the sample collection unit through the first conduit, and a first water pump is provided on the first conduit. The disinfection chamber is connected to the alcohol storage tank through the second conduit, and a second water pump is provided on the second conduit.

[0009] Preferably, a fan is provided inside the disinfection chamber near the second conduit. The fan is used to accelerate the diffusion of the alcohol solution inside the disinfection chamber and is generally turned on after the anhydrous ethanol is replenished.

[0010] Preferably, the sample collection unit includes a volumetric cup, the first conduit is disposed inside the volumetric cup, and an alcohol detection module is provided inside the volumetric cup.

[0011] Preferably, the measuring cup is equipped with an air pump, which is connected to a controller. The air pump blows air into the alcohol solution to be tested, thereby ensuring the reliability of the concentration measurement.

[0012] Preferably, the measuring cup is provided with a sealed top cover, and the first conduit, the pipe connected to the air pump, and the alcohol detection module are all fixed on the top cover. The first conduit and the pipe connected to the air pump extend into the alcohol solution to be tested, and the air inlet of the alcohol detection module is located above the alcohol solution to be tested.

[0013] Preferably, the bottom of the measuring cup is equipped with a heating module, which is connected to the controller. Heating by the heating module accelerates the alcohol concentration measurement rate.

[0014] Preferably, a one-way valve is provided above the alcohol storage tank to balance the pressure inside and outside the bottle after anhydrous ethanol is drawn. A second conduit is placed inside the alcohol solution in the alcohol storage tank to ensure that anhydrous ethanol can be drawn during concentration compensation.

[0015] Preferably, the alcohol detection module is an electrochemical alcohol detector; the first conduit is an adjustable-length pipette, the length of which can be adjusted according to the amount of solution in the disinfection chamber to ensure the reliability of alcohol concentration measurement; the heating module is a heating copper wire mesh.

[0016] The beneficial effects of this invention are as follows: This invention can identify the alcohol concentration of the current test solution, detect the concentration at regular intervals, and select whether to replenish the reduced solution concentration as needed; when replenishing, the difference between the current value and the standard concentration and the volume of ethanol to be added can be calculated, and the concentration can be automatically replenished to the required range throughout the process.

[0017] The main advantages of this utility model can be reflected in the following aspects: 1. It can more quickly test the alcohol concentration of the current solution, and the ideal alcohol concentration can be calculated based on the tested alcohol concentration value.

[0018] 2: Even after mixing multiple alcohol solutions, it is still possible to calculate and then inject ethanol to achieve the ideal alcohol concentration. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Wherein, A is an alcohol storage tank, B is a sample collection unit, C is a disinfection chamber, 1 is a first conduit, 2 is a second conduit, 3 is a measuring cup, 4 is a first water pump, 5 is an air pump, 6 is an alcohol detection module, 7 is a heating module, 8 is a one-way valve, 9 is a second water pump, 10 is a controller, and 11 is a fan. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1 As shown, a liquid alcohol solution detection and concentration compensation device includes a disinfection chamber C, a sample collection unit B, and an alcohol storage tank A. The disinfection chamber C is connected to the sample collection unit B via a first water pump 4. The sample collection unit B is equipped with an alcohol detection module 6. The alcohol storage tank A is connected to the disinfection chamber C via a second water pump 9. The alcohol detection module 6, the first water pump 4, and the second water pump 9 are all connected to a controller 10. The disinfection chamber C is used to store the alcohol solution. Medical devices to be disinfected can be immersed in the disinfection chamber C for immersion disinfection. The sample collection unit B uses the first water pump 4 to draw a fixed amount of the alcohol solution to be tested from the disinfection chamber C and uses the alcohol detection module 6 to measure the concentration of the solution. The alcohol storage tank A replenishes the disinfection chamber C with a high concentration of alcohol solution via the second water pump 9, dynamically compensating for the concentration of the alcohol solution in the disinfection chamber C.

[0024] The disinfection chamber C is equipped with a first conduit 1 and a second conduit 2. The disinfection chamber C is connected to the sample collection unit B via the first conduit 1. A first water pump 4 is installed on the first conduit 1, which extracts a small amount of alcohol liquid and transports it to the sample collection unit B for testing via the first conduit 1. The second conduit 2 is used to inject anhydrous ethanol, calculated and added, into the disinfection chamber C. The first conduit 1 is an adjustable pipette, allowing for length adjustment to ensure the liquid in the disinfection chamber C is delivered to the sample collection unit B. A small fan 11 is located on the side of the disinfection chamber C near the second conduit 2. This fan accelerates the diffusion rate and flow speed of the alcohol solution after the anhydrous ethanol is injected. The small fan 11 also stirs the alcohol solution, ensuring rapid and uniform mixing within the disinfection chamber C to achieve a standard alcohol solution suitable for disinfection.

[0025] The sample collection unit B includes a measuring cup 3, with a first conduit 1 connected to it. A first water pump 4 draws a small amount of a fixed volume of the alcohol solution to be tested from the measuring cup 3 into the cup. The measuring cup 3 contains an alcohol detection module 6 for measuring alcohol concentration. An air pump 5 is mounted on the measuring cup 3 and connected to a controller 10. The air pump 5 blows air into the measuring cup 3, controlled by the controller 10, allowing the alcohol gas to evaporate. The alcohol detection module 6 detects the concentration of the emitted alcohol gas using a high-precision electrochemical alcohol detector. The measuring cup 3 has a top cover, on which the first conduit 1, the pipe connected to the air pump 5, and the alcohol detection module 6 are all fixed. The top cover is sealed to prevent the introduction of other gaseous impurities when measuring the evaporated gas. The first conduit 1 and the pipe connected to the air pump 5 extend into the alcohol solution to be tested, and the air inlet of the alcohol detection module 6 is located above the alcohol solution.

[0026] A heating module 7 is located at the bottom of the measuring cup 3. This module heats the alcohol solution in the measuring cup 3, accelerating the measurement process and enabling alcohol concentration detection after heating. The heating module 7 is a copper wire mesh heater, connected to a controller 10. The controller 10 uses an existing PID algorithm to regulate the temperature of the alcohol solution in the measuring cup 3, maintaining it at 34℃ for concentration measurement. The heating module 7 accelerates alcohol evaporation, increasing the detection rate. Internally, the heating module 7 contains a DS18B20 temperature sensor that collects the current temperature in real time, and uses a PID algorithm for precise temperature control.

[0027] Alcohol storage tank A is used to store the ethanol used in preparing the original solution, i.e., the alcohol used in preparing the alcohol solution. The opening of alcohol storage tank A is sealed to prevent the evaporation of anhydrous ethanol. A second water pump 9 is installed on the second conduit 2. One end of the second conduit 2 is connected to alcohol storage tank A and extends into the alcohol solution, while the other end extends into the alcohol solution to be tested in disinfection chamber C. Thus, a calculated amount of anhydrous ethanol can be drawn and injected into disinfection chamber C by the second water pump 9. A one-way valve 8 is located above alcohol storage tank A to balance the internal and external atmospheric pressure when drawing anhydrous ethanol.

[0028] The function of controller 10 is to compare the alcohol concentration measured by alcohol detection module 6 with the target concentration when the alcohol detector detects that the current alcohol concentration is lower than the expected value, calculate the difference between the two, and then calculate the volume of anhydrous alcohol to be injected through simple mathematical calculations. It then starts the second water pump 9 to draw the required ethanol and inject it into the disinfection chamber C. Controller 10 includes an electrochemical sensor and a GD32F103 MCU, which can perform timed detection of alcohol in disinfection chamber C. The timer is adjustable, and the minimum set acquisition time is generally greater than 2 minutes.

[0029] During use, controller 10 starts the first water pump 4, drawing 50ml of alcohol solution from the disinfection chamber C through the first conduit 1. The alcohol solution to be tested is heated to 34°C by the heating module 7 and maintained at 34°C. The alcohol concentration in the measuring cup 3 is measured by the alcohol detection module 6. According to the principle of the wet bath simulator: at 34°C, the empirical formula between the ethanol concentration in the vapor (C_vap, mg / L) and the ethanol concentration in the solution (C_liq, g / 100ml) is: Cvap = k × Cliq, where k is a constant, usually taken as 4 at 34°C (i.e., Cvap = 4 × Cliq). This means that for every 0.01 g / 100ml increase in solution concentration, the vapor concentration increases by approximately 0.04 mg / L. The alcohol concentration C_vap in the vapor can be obtained by measurement by the alcohol detection module. Since the value of k is 4, the ethanol concentration C_liq in the alcohol solution in the disinfection chamber is C_vap / 4. Then, the controller 10 compares the detected alcohol concentration with the standard solution concentration C_cri, i.e., the target expected value. If the detected alcohol concentration meets the requirements, no further operation is performed. If the detected alcohol concentration drops to the minimum threshold, an appropriate amount of alcohol can be injected into the solution based on the calculation results by periodically collecting solution samples. The small fan 11 stirs the solution to bring the concentration to the standard for use. When the detected alcohol concentration drops to the minimum threshold, the difference between the measured alcohol concentration and the target expected value α = C_cri – Cvap (ethanol concentration C_liq) can be calculated. The standard amount of ethanol injected can be obtained by the following calculation: C1 * V1 + C2 * V2 = C3 * V3; the volume V3 can be calculated as (C1 * V1 + C2 * V2) / C3. The concentration of the alcohol solution can be obtained by the alcohol detection module 6, which is the concentration C1. The volume V1 can be measured as the volume of the alcohol solution in the disinfection chamber. C3 is the anhydrous ethanol concentration of 99.99%, and V3 is the volume of anhydrous ethanol to be injected. C2 represents the required alcohol concentration of the solution, and V2 represents the original solution volume plus the volume of anhydrous ethanol to be injected, i.e., V2 = V1 + V3. When the volume V1 is relatively large, V3 ≈ V1. Controller 10 starts the second water pump 9 to inject anhydrous ethanol of volume V3 into the disinfection chamber C. At the same time, the controller starts the small fan 11 to stir the alcohol solution in the disinfection chamber, so that it reaches the standard solution concentration suitable for disinfection.

[0030] Insert a pipette into the measuring cup 3, with one end submerged in the solution and the other end connected to a water pump. After the measurement is complete, start the water pump to extract the solution from the measuring cup 3. Any remaining water droplets will evaporate and be discharged through the heating module at the bottom.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for detecting and compensating the concentration of a liquid alcohol solution, characterized in that: It includes a disinfection chamber (C), a sample collection unit (B), and an alcohol storage tank (A). The disinfection chamber (C) is connected to the sample collection unit (B), and the sample collection unit (B) is equipped with an alcohol detection module (6). The alcohol storage tank (A) is connected to the disinfection chamber (C), and the alcohol detection module (6) is connected to the controller (10).

2. The liquid alcohol solution detection and concentration compensation device according to claim 1, characterized in that: The disinfection chamber (C) is connected to the sample collection unit (B) via a first water pump (4), and the alcohol storage tank (A) is connected to the disinfection chamber (C) via a second water pump (9). Both the first water pump (4) and the second water pump (9) are connected to the controller (10).

3. The liquid alcohol solution detection and concentration compensation device according to claim 2, characterized in that: The disinfection chamber (C) is equipped with a first conduit (1) and a second conduit (2). The disinfection chamber (C) is connected to the sample collection unit (B) through the first conduit (1). A first water pump (4) is installed on the first conduit (1). The disinfection chamber (C) is connected to the alcohol storage tank (A) through the second conduit (2). A second water pump (9) is installed on the second conduit (2).

4. The liquid alcohol solution detection and concentration compensation device according to claim 3, characterized in that: A fan is provided on the side of the disinfection chamber (C) near the second conduit (2).

5. The liquid alcohol solution detection and concentration compensation device according to claim 3 or 4, characterized in that: The sample collection unit (B) includes a volumetric cup (3), the first conduit (1) is disposed inside the volumetric cup (3), and an alcohol detection module (6) is disposed inside the volumetric cup (3).

6. The liquid alcohol solution detection and concentration compensation device according to claim 5, characterized in that: The volume measuring cup (3) is equipped with an air pump (5), which is connected to the controller (10).

7. The liquid alcohol solution detection and concentration compensation device according to claim 6, characterized in that: The measuring cup (3) is provided with a sealed top cover. The first conduit (1), the pipe connected to the air pump (5), and the alcohol detection module (6) are all fixed on the top cover. The first conduit (1) and the pipe connected to the air pump (5) are all inserted into the alcohol solution to be tested. The air inlet of the alcohol detection module (6) is located above the alcohol solution to be tested.

8. The liquid alcohol solution detection and concentration compensation device according to claim 6 or 7, characterized in that: The bottom of the volume measuring cup (3) is provided with a heating module (7), which is connected to the controller (10).

9. The liquid alcohol solution detection and concentration compensation device according to claim 8, characterized in that: A one-way valve (8) is provided above the alcohol storage tank (A), and a second conduit (2) is installed in the alcohol solution in the alcohol storage tank (A).

10. The liquid alcohol solution detection and concentration compensation device according to claim 9, characterized in that: The alcohol detection module (6) is an electrochemical alcohol detector; the first conduit (1) is an adjustable-length straw; and the heating module (7) is a heating copper wire mesh.

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