Dissolved oxygen sensor with reverse osmosis protection structure

Abstract

The utility model relates to a dissolved oxygen sensor with a reverse osmosis protection structure, which comprises a body and a reverse osmosis protection structure, the filtering part covers the liquid connecting membrane so as to prevent solid particles in the water body from being in contact with the liquid connecting membrane; an annular mounting groove is formed outside the liquid connecting film at the detection end of the body; the filtering part comprises an inserting ring and a filtering membrane assembly; wherein the filtering membrane assembly covers the liquid connecting membrane, one end of the insertion ring is inserted into the annular mounting groove of the body, so that the detection end of the body, the filtering membrane assembly and the insertion ring form a cavity, and the middle of the detection end is fixedly connected with the liquid connecting membrane. The contact surface of the liquid connecting membrane and the water body is positioned in a cavity formed by the detection end of the body, the filtering membrane component and the inserting ring. According to the dissolved oxygen sensor with the reverse osmosis protection structure, the accuracy of the dissolved oxygen sensor is improved, and the service life of the dissolved oxygen sensor is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of dissolved oxygen sensors, specifically to a dissolved oxygen sensor with a reverse osmosis protection structure. Background Technology

[0002] A dissolved oxygen sensor is a sensor that detects the oxygen content in water. During use, the main body of the dissolved oxygen sensor needs to be electrically connected to an external control system, and the entire dissolved oxygen sensor needs to be installed inside the water body. Thus, the dissolved oxygen sensor can detect the oxygen content in the water and transmit the detected data to the external control system.

[0003] Because water contains solid particles such as sludge, aquatic plants, and other debris, the liquid-coated membrane on the dissolved oxygen sensor body comes into contact with these solid particles after prolonged use, which can easily lead to a decrease in the detection accuracy of the dissolved oxygen sensor. This technical problem urgently needs to be solved.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0005] The purpose of this invention is to provide a dissolved oxygen sensor with a reverse osmosis protection structure to solve the above problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A dissolved oxygen sensor with reverse osmosis protection structure, including:

[0008] The main body has a liquid-contact membrane at its detection end;

[0009] A filter element that covers the liquid-contact membrane to prevent solid particles in the water from contacting the liquid-contact membrane; wherein a water-storage gap exists between the filter element and the liquid-contact membrane.

[0010] In one optional embodiment, the detection end is provided with an annular mounting groove, which is arranged around the outer edge of the liquid-contact membrane.

[0011] The filter component includes an annular insertion ring and a filter membrane assembly; wherein

[0012] The insertion ring is inserted into the annular mounting groove so that the filter membrane assembly covers the liquid junction membrane.

[0013] In one alternative embodiment, the insertion ring is movably inserted into the annular mounting groove for rotation and / or sliding.

[0014] In one alternative embodiment, the insertion ring and mounting groove are sealed together.

[0015] In one alternative embodiment, the filtration membrane assembly includes an ultrafiltration membrane, a nanofiltration membrane, and a reverse osmosis membrane stacked sequentially from the outside to the inside.

[0016] Secondly, this embodiment also provides a dissolved oxygen sensor with a reverse osmosis protection structure, including:

[0017] The main body has a liquid-contact membrane at its detection end;

[0018] A filter element is movably disposed at the detection end and forms a cavity in front of the liquid-contact membrane, into which filtered water enters.

[0019] In one optional embodiment, the detection end is provided with an annular mounting groove, which is arranged around the outer edge of the liquid-contact membrane.

[0020] The filter component includes a connector ring and a filter membrane assembly; wherein

[0021] The insertion ring is inserted into the annular mounting groove so that the filter membrane assembly covers the liquid junction membrane.

[0022] In one alternative embodiment, the insertion ring and the annular mounting groove are sealed during insertion.

[0023] In one optional embodiment, the filter membrane assembly in the filter component includes an ultrafiltration membrane, a nanofiltration membrane, and a reverse osmosis membrane stacked sequentially from the outside to the inside.

[0024] The beneficial effects of this utility model are as follows: It provides a dissolved oxygen sensor with a reverse osmosis protection structure. By using the body, annular mounting groove, liquid junction membrane, and filter components in cooperation, a dissolved oxygen sensor with a reverse osmosis protection structure is made to replace the dissolved oxygen sensor without a filter component. During the use of the dissolved oxygen sensor, there is a water storage gap or cavity between the filter component and the liquid junction membrane. The reverse osmosis protection structure of the filter component filters the water in contact with the liquid junction membrane, ensuring that solid particles in the water cannot come into contact with the liquid junction membrane of the dissolved oxygen sensor. This improves the accuracy of the dissolved oxygen sensor and extends its service life.

[0025] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description, claims, and drawings.

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of the dissolved oxygen sensor with reverse osmosis protection structure and water storage gap provided in the embodiment of this utility model.

[0029] Figure 2 This is a schematic diagram of the overall structure of the cavity-type dissolved oxygen sensor with reverse osmosis protection provided in an embodiment of this utility model.

[0030] Figure 3 This is another overall structural schematic diagram of the dissolved oxygen sensor with reverse osmosis protection structure provided in an embodiment of this utility model.

[0031] Figure 4 This is a partial structural schematic diagram of a dissolved oxygen sensor with reverse osmosis protection provided in an embodiment of this utility model.

[0032] In the diagram: 1. Body; 11. Detection end; 12. Annular mounting groove; 13. Liquid-contact membrane; 2. Filter component; 21. Insertion ring; 22. Filter membrane assembly; 3. Water storage gap; 4. Cavity. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0034] During the detection process, oxygen in the water comes into contact with the liquid junction membrane. The detection structure inside the dissolved oxygen sensor detects the oxygen content on the liquid junction membrane. However, due to the contact between solid particles inside the water and the liquid junction membrane, some solid particles will adhere to the surface of the liquid junction membrane after long-term contact. This prevents the water from properly contacting all parts of the liquid junction membrane, resulting in an increasingly larger error in the oxygen content detected by the dissolved oxygen sensor.

[0035] Therefore, it is necessary to design a dissolved oxygen sensor with a protective structure to protect the liquid junction membrane of the dissolved oxygen sensor, thereby improving the detection accuracy and service life of the dissolved oxygen sensor.

[0036] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure below should be considered contributions made by the inventor to this disclosure.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0039] refer to Figure 1 At least one embodiment provides a dissolved oxygen sensor with a reverse osmosis protection structure, comprising: a body 1, including a liquid-contact membrane 13; directly contacting water and oxygen in the water, the oxygen in the water entering the body 1 through the liquid-contact membrane 13 and being detected by other structures within the body 1 (this detection data is prior art, and this embodiment does not improve the detection process). A filter element 2, used to protect the liquid-contact membrane 13 to separate it from solid particles in the water; ensuring that solid particles in the water cannot contact the liquid-contact membrane 13 through the filter element 2. A water storage gap 3 exists between the filter element 2 and the liquid-contact membrane 13.

[0040] In this example, the water storage gap 3 is formed naturally due to the non-tight adhesion between the liquid-contact membrane 13 and the filter element 2, combined with the elasticity of the material. The gap width of the water storage gap 3 is approximately between 1mm and 5mm. Therefore, the water in the water storage gap 3 has sufficient contact with the liquid-contact membrane 13, and thus will not affect the oxygen content error detected by the dissolved oxygen sensor.

[0041] In some embodiments, the filter element 2 may enclose the entire body 1, while in other embodiments it may only cover the liquid-contact membrane 13.

[0042] In the following embodiments, the specific implementation of this solution is described by covering the liquid-contact membrane 13 with only two filter components.

[0043] In some embodiments, the filter element 2 is connected to the body 1 and is located outside the liquid-contact membrane 13 to ensure that water molecules and oxygen elements in the water can contact the liquid-contact membrane 13 after passing through the filter element 2, and to ensure that solid particles in the water cannot contact the liquid-contact membrane 13 through the filter element 2; the body 1 is electrically connected to an external control system for controlling its operation and shutdown, as well as transmitting signals.

[0044] refer to Figure 1 and Figure 2 In some embodiments, the body 1 also includes an annular mounting groove 12, which is located on the detection end 11 of the body 1 and is used to provide an installation position for the filter component 2. Meanwhile, since the filter component 2 is located on the detection end 11, when the water is calm, the filter component 2 moves away from the body 1 under the action of gravity.

[0045] In some embodiments, the filter element 2 includes a plug ring 21 and a filter membrane assembly 22. The filter membrane assembly 22 is connected to the body 1 via the plug ring 21 and an annular mounting groove 12, so that the body 1, the filter membrane assembly 22, and the plug ring 21 form a cavity 4, ensuring that solid particles in the water cannot pass through the filter element 2 to reach the cavity 4 and contact the liquid-contact membrane 13. Therefore, the contact between the water and the liquid-contact membrane 13 in the cavity 4 is sufficient, so it will not affect the oxygen content error detected by the dissolved oxygen sensor.

[0046] In this example, the cavity 4 is formed to provide a water storage space between the liquid-contact membrane 13 and the filter element 2. The distance between the liquid-contact membrane 13 and the filter element 2 is greater than 5 mm and does not exceed 10 mm. Compared to the water storage gap 3, the cavity 4 has a larger water storage capacity, making it more suitable for the service life of the dissolved oxygen sensor. However, because it lengthens the dissolved oxygen sensor, it is not suitable for certain detection scenarios requiring specific lengths. Therefore, the different designs of the two dissolved oxygen sensors can be used for various scenarios.

[0047] In some embodiments, the insertion ring 21 and the annular mounting groove 12 are sealed and inserted.

[0048] refer to Figure 2 In some embodiments, the middle part of the detection end 11 is fixedly connected to the liquid-contact membrane 13 to ensure that the contact surface between the liquid-contact membrane 13 and the water is located within the cavity 4 formed by the body 1, the filter membrane assembly 22 and the insertion ring 21.

[0049] In some embodiments, the filter membrane assembly 22 is connected to the insertion ring 21 at a location away from the liquid-contact membrane 13 to avoid direct contact between the filter membrane assembly 22 and the liquid-contact membrane 13, which could affect the liquid-contact membrane 13.

[0050] In some embodiments, the insertion ring 21 is movably connected to the annular mounting groove 12 so that the filter component 2 can move relative to the body 1; the cross-sections of the insertion ring 21 and the mounting groove 12 are both annular.

[0051] In some embodiments, the filter membrane assembly 22 is fixedly connected to the insertion ring 21 to ensure that the filter membrane assembly 22 and the insertion ring 21 move synchronously, so that the filter membrane assembly 22 moves with the insertion ring 21; the filter membrane assembly 22 includes multiple layers of filter membranes.

[0052] In some embodiments, the filtration membrane assembly 22 includes an ultrafiltration membrane, a nanofiltration membrane, and a reverse osmosis membrane, for filtering solid particles of different sizes respectively; the ultrafiltration membrane, nanofiltration membrane, and reverse osmosis membrane are sequentially distributed along the insertion ring 21 toward the liquid junction membrane 13, for sequentially filtering water flowing through the filtration membrane assembly 22 into the cavity 4, for filtering solid particles of different sizes respectively.

[0053] refer to Figure 2 and Figure 3 In some embodiments, the sealed cavity of the body 1 also includes a detector, optical components, a processor, and an output module, which are used to cooperate with the liquid-contact membrane 13 to complete the detection of water oxygen content and signal transmission; the liquid-contact membrane 13 is fixedly connected to one end of the body 1, and the side of the liquid-contact membrane 13 away from the filter membrane assembly 22 is located in the sealed cavity of the body 1.

[0054] refer to Figure 4 In some embodiments, the liquid junction membrane 13 is located in the middle of the detection end 11.

[0055] The working principle of this invention is as follows: Before using the dissolved oxygen sensor with reverse osmosis protection structure, the sensor is installed in the water body, that is, the main body 1 of the dissolved oxygen sensor with reverse osmosis protection structure is fixed to the installation mechanism in the water body. When the dissolved oxygen sensor with reverse osmosis protection structure is used: water molecules and oxygen elements in the water body pass through the filter membrane assembly 22 to reach the cavity 4 formed by the main body 1, the filter membrane assembly 22, and the insertion ring 21. The water and oxygen elements in the cavity 4 then fully contact the liquid-contact membrane 13. The main body 1 then detects the oxygen element in contact with the liquid-contact membrane 13, thereby determining the oxygen content in the water body. During this process, solid particles in the water body contact the filter membrane assembly 22 and remain on it, unable to pass through the filter membrane assembly 22 to reach the cavity 4. The above process is repeated until the work is completed.

[0056] In the above embodiments, unless otherwise stated, when used to describe numerical values, the terms "about", "approximately", "basically", etc., indicate a change of + / - 10% in that value.

[0057] The above embodiments are used to further illustrate the present invention, but do not limit the present invention to these specific embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be understood as being within the protection scope of the present invention.

Claims

1. A dissolved oxygen sensor with a reverse osmosis protection structure, characterized in that, include: The main body (1) has a liquid-bonded membrane (13) at its detection end (11). The filter element (2) covers the liquid-contact membrane (13) to prevent solid particles in the water from contacting the liquid-contact membrane (13); wherein, there is a water storage gap (3) between the filter element (2) and the liquid-contact membrane (13).

2. The dissolved oxygen sensor with reverse osmosis protection structure according to claim 1, characterized in that: The detection end (11) is provided with an annular mounting groove (12), which is arranged around the outer edge of the liquid-bonded membrane (13); The filter component (2) includes an annular insertion ring (21) and a filter membrane assembly (22); wherein The insertion ring (21) is inserted into the annular mounting groove (12) so that the filter membrane assembly (22) covers the liquid junction membrane (13).

3. The dissolved oxygen sensor with reverse osmosis protection structure according to claim 2, characterized in that: The insertion ring (21) is movably inserted into the annular mounting groove (12) for rotation and / or sliding.

4. The dissolved oxygen sensor with reverse osmosis protection structure according to claim 2, characterized in that: The insertion ring (21) and the mounting groove (12) are sealed and inserted.

5. The dissolved oxygen sensor with reverse osmosis protection structure according to claim 2, characterized in that: The filtration membrane assembly (22) includes an ultrafiltration membrane, a nanofiltration membrane, and a reverse osmosis membrane stacked sequentially from the outside to the inside.

6. The dissolved oxygen sensor with reverse osmosis protection structure according to claim 1, characterized in that: The gap width of the water storage gap (3) is approximately between 1mm and 5mm.

7. A dissolved oxygen sensor with a reverse osmosis protection structure, characterized in that, include: The main body (1) has a liquid-bonded membrane (13) at its detection end (11). The filter element (2) is movably disposed at the detection end (11) and forms a cavity (4) in front of the liquid-contact membrane (13). The filter element (2) allows filtered water to enter the cavity (4).

8. The dissolved oxygen sensor with reverse osmosis protection structure according to claim 7, characterized in that, The detection end (11) is provided with an annular mounting groove (12), which is arranged around the outer edge of the liquid-bonded membrane (13); The filter component (2) includes a connector ring (21) and a filter membrane assembly (22); wherein The insertion ring (21) is inserted into the annular mounting groove (12) so that the filter membrane assembly (22) covers the liquid-contact membrane (13); and The distance between the liquid-contact membrane (13) forming the cavity (4) and the filter element (2) is greater than 5 mm and does not exceed 10 mm.

9. The dissolved oxygen sensor with reverse osmosis protection structure according to claim 8, characterized in that, The insertion ring (21) and the annular mounting groove (12) are sealed and inserted.

10. The dissolved oxygen sensor with reverse osmosis protection structure according to any one of claims 7-9, characterized in that, The filter membrane assembly (22) in the filter component (2) includes an ultrafiltration membrane, a nanofiltration membrane and a reverse osmosis membrane stacked sequentially from the outside to the inside.

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