A device and method for accurately controlling dissolved oxygen content

Abstract

The invention relates to a dissolved oxygen content control device, in particular to a dissolved oxygen content precise control device and method, belonging to the technical field of dissolved oxygen, comprising a base, supporting legs, a sealed water tank, a water inlet pipe, a dissolved oxygen content measuring system, a gas supply system, a pressure regulating system, a temperature regulating system, a real-time control system and a water level sensor, wherein the sealed water tank is fixedly mounted on the top of the base through the supporting legs, a water inlet pipe is mounted on one side of the sealed water tank, the water inlet pipe is communicated with the sealed water tank, a dissolved oxygen content measuring system is mounted on the base, and the dissolved oxygen content measuring system is communicated with the water inlet pipe and the inside of the sealed water tank, and the dissolved oxygen content measuring system is used to measure the oxygen content in the water inlet pipe and the sealed water tank; the invention improves the accuracy of controlling the dissolved oxygen content, can control the pressure in the sealed water tank through the pressure regulating system, prevents the oxygen solubility from being affected by the air pressure factor, and further improves the accuracy of dissolved oxygen content control.

Description

Technical Field

[0001] The invention relates to a dissolved oxygen content control device, in particular to a dissolved oxygen content precise control device and method, belonging to the technical field of dissolved oxygen. Background Art

[0002] Molecular oxygen in the air dissolved in water is called dissolved oxygen. The content of dissolved oxygen in water is closely related to the partial pressure of oxygen in the air and the temperature of water. The molecular oxygen dissolved in water is called dissolved oxygen. The amount of dissolved oxygen in water is an indicator of the self-purification ability of water. When controlling the dissolved oxygen content, a dissolved oxygen content control device is required. At present, the publication number (CN201720071907.6) discloses an industrial online dissolved oxygen controller. The advantages of this technical solution are: compact structure, simple operation, high detection accuracy, intuitive and accurate display of dissolved oxygen changes in water, and convenient for R&D personnel to carry out secondary development on this product. However, this technical solution only detects the dissolved oxygen content and cannot accurately control the dissolved oxygen content.

[0003] Publication No. (CN201910070041.0) discloses a precise control system for dissolved oxygen content in experimental water and a method for use. The advantages of this technical solution are: the dissolved oxygen content in the experimental water is precisely controlled at the μg / L level, and the dissolved oxygen content can be controlled within a set range for a long time. At the same time, the system can run automatically without supervision, saving manpower and material resources. Although this technical solution can control the dissolved oxygen content, it cannot eliminate the influence of pressure and temperature on the solubility of oxygen, and the control of the dissolved oxygen content is not precise enough. For this reason, an optimized and improved device and method for precise control of dissolved oxygen content are proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for accurately controlling dissolved oxygen content in order to solve the above-mentioned problem, which can fill gas into a sealed water tank to improve the accuracy of controlling dissolved oxygen content.

[0005] The present invention achieves the above-mentioned purpose through the following technical scheme, a device and method for accurately controlling dissolved oxygen content, including a base, support legs, a sealed water tank, a water inlet pipe, a dissolved oxygen content measurement system, a gas supply system, a pressure regulation system, a temperature regulation system, a real-time control system and a water level sensor. The sealed water tank is fixedly installed on the top of the base through the support legs, and the water inlet pipe is installed on one side of the sealed water tank, and the water inlet pipe is connected to the sealed water tank.

[0006] The dissolved oxygen content measuring system is installed on the base and is connected to the water inlet pipe and the inside of the sealed water tank. The dissolved oxygen content measuring system is used to measure the oxygen content in the water inlet pipe and the sealed water tank.

[0007] A mounting groove is provided on the top of the base, the gas supply system is fixedly installed in the mounting groove, and the gas supply system is communicated with the inside of the sealed water tank, and the gas supply system is used to supply gas to the sealed water tank.

[0008] The pressure regulating system and the water level sensor are both fixedly installed at one end of the top of the sealed water tank. The pressure regulating system is used to regulate the pressure in the sealed water tank, and the water level sensor is used to measure the water level height in the sealed water tank.

[0009] The temperature regulating system is fixedly installed in the square grooves opened on both sides of the sealed water tank, and the temperature regulating system is used to regulate the temperature of the sealed water tank.

[0010] The real-time control system is fixed on the top of the base, and the dissolved oxygen content measuring system, the gas supply system, the pressure regulating system, the temperature regulating system and the water level sensor are all electrically connected to the real-time control system.

[0011] Preferably, in order to enable the dissolved oxygen content detector to respectively detect the dissolved oxygen content in the water inlet pipe and the sealed water tank through the first electrode detection block and the second electrode detection block, the dissolved oxygen content determination system includes a data processor, a dissolved oxygen content detector, a first connecting line, a second connecting line, a first electrode detection block, a second electrode detection block and an electromagnetic check valve, the data processor and the dissolved oxygen content detector are both fixedly installed on the base, and the data processor is electrically connected to the dissolved oxygen content detector through the first connecting line, the dissolved oxygen content detector is electrically connected to the first electrode detection block and the second electrode detection block through the second connecting line, the first electrode detection block and the second electrode detection block are respectively fixedly penetrated in the water inlet pipe and the sealed water tank, the electromagnetic check valve is installed on the water inlet pipe, and the electromagnetic check valve is located between the sealed water tank and the first electrode detection block.

[0012] Preferably, in order to control the opening of the first electromagnetic valve, the second electromagnetic valve or the third electromagnetic valve through a real-time control system, the air pump is turned on to extract oxygen, nitrogen or air, so that the gas can be discharged into the gas distribution box through the air outlet pipe, and the gas is further discharged into the sealed water tank through the air outlet nozzle to achieve the regulation of the dissolved oxygen content, the gas supply system includes an oxygen storage bottle, a nitrogen storage bottle, an air storage bottle, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a three-way connecting pipe, an air pump, a mounting seat, an air outlet pipe, a gas distribution box, an air outlet nozzle and a sealing gasket, the oxygen storage bottle, the nitrogen storage bottle and the air storage bottle are installed in parallel in the installation groove opened on the top of the base, and ... The oxygen storage bottle, the nitrogen storage bottle and the air storage bottle are all connected with the air pump through the three-way connecting pipe, the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are installed on the three-way connecting pipe, and the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are respectively located at one side of the ports of the oxygen storage bottle, the nitrogen storage bottle and the air storage bottle, the air outlet end of the air pump is connected with the air outlet pipe, the air separator box is installed at one end of the air outlet pipe, and the air separator box is connected with the air outlet pipe, the air outlet nozzles are evenly installed on the air separator box, and the air outlet nozzles are fixedly penetrated through the bottom of the sealed water tank through the sealing gasket.

[0013] Preferably, in order to be able to control the pressure in the sealed water tank, the pressure regulating system includes a pressure relief pipe, a safety valve and a pressure gauge. The pressure relief pipe is fixedly installed on the top of the sealed water tank, and the pressure relief pipe is connected to the sealed water tank. The safety valve and the pressure gauge are respectively fixedly installed on the branch pipe at the top of the pressure relief pipe.

[0014] Preferably, in order to control the temperature of the sealed water tank by controlling the semiconductor refrigerator and the heater, and to achieve auxiliary control of the dissolved oxygen content, the temperature regulation system includes a temperature controller, an embedded connecting wire, a semiconductor refrigerator and a heater, the temperature controller is fixed on the side wall at one end of the sealed water tank, the semiconductor refrigerator and the heater are respectively fixedly installed in square grooves opened on both sides of the sealed water tank, and the semiconductor refrigerator and the heater are electrically connected to the temperature controller through the embedded connecting wire.

[0015] A method for accurately controlling dissolved oxygen content comprises the following steps:

[0016] Step 1: Connect the water inlet pipe to the water inlet, and the water flows through the dissolved oxygen content determination system in the water inlet pipe, so that the dissolved oxygen content determination system performs the first dissolved oxygen content determination, and the water flows into the sealed water tank, so that the dissolved oxygen content determination system performs the second dissolved oxygen content determination. When the water flows into the sealed water tank, the water level in the sealed water tank is measured by the water level sensor. When the water level meets the use level, the water level sensor transmits the water level signal to the real-time control system, and the real-time control system controls the dissolved oxygen content determination system to stop water intake.

[0017] Step 2: The dissolved oxygen content measuring system measures the dissolved oxygen content in the sealed water tank to obtain dissolved oxygen content measurement data, and the dissolved oxygen content measurement data is transmitted to the real-time control system. According to the dissolved oxygen content data, the gas supply system is controlled by the real-time control system. When the dissolved oxygen content is too high, the second electromagnetic valve is controlled to open by the real-time control system, and the air pump is turned on to extract the nitrogen in the nitrogen storage bottle, so that the nitrogen is discharged into the gas distribution box through the air outlet pipe, and the nitrogen is further discharged into the sealed water tank through the air outlet nozzle to discharge the oxygen in the water and reduce the dissolved oxygen content. When the dissolved oxygen content is too low, the use method is the same as the operation method when the dissolved oxygen content is too high, and oxygen is discharged into the sealed water tank to increase the dissolved oxygen content. When the dissolved oxygen content is too low and close to the required content, the same operation method is used as when the dissolved oxygen content is too high, and air is discharged into the sealed water tank to increase the dissolved oxygen content.

[0018] Step 3: When the dissolved oxygen content measuring system measures and controls the dissolved oxygen content in the sealed water tank, the temperature controller is controlled to operate the semiconductor refrigerator or the heater to heat or cool the sealed water tank to assist in controlling the dissolved oxygen content. The pressure gauge measures the pressure in the sealed water tank and transmits the measured pressure data to the real-time control system, which controls the opening and closing of the safety valve through the real-time control system.

[0019] Preferably, the specific steps of the dissolved oxygen content measurement system are: water flows through the water inlet pipe, the first electrode detection block and the dissolved oxygen content detector perform a first measurement on the dissolved oxygen content, and after entering the sealed water tank, the second electrode detection block and the dissolved oxygen content detector perform a second measurement on the dissolved oxygen content, and the two measurement data are compared by the data processor and transmitted to the real-time control system.

[0020] The beneficial effects of the present invention are as follows: by controlling the dissolved oxygen content measuring system to measure and compare the dissolved oxygen contents in the water inlet pipe and the sealed water tank, and further by controlling the air pump, on the one hand, the nitrogen in the nitrogen storage bottle can be discharged into the sealed water tank, and when the dissolved oxygen content is too high, nitrogen is filled in to reduce the dissolved oxygen content, and on the other hand, the oxygen in the oxygen storage bottle can be discharged into the sealed water tank, and when the dissolved oxygen content is too low, oxygen is filled in to increase the dissolved oxygen content, and air can also be filled in the sealed water tank at the same time, so as to improve the accuracy of controlling the dissolved oxygen content, prevent excessive oxygen from being filled in, and prevent the dissolved oxygen content from being difficult to control, and control the pressure in the sealed water tank through the pressure regulating system, so that the sealed water tank will not be damaged due to excessive air pressure, and at the same time, prevent the air pressure factor from affecting the oxygen solubility, and further improve the accuracy of dissolved oxygen content control. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the overall installation structure of the dissolved oxygen content measuring system of the present invention.

[0023] Figure 3 It is a schematic diagram of the overall side structure of the present invention.

[0024] Figure 4 It is a schematic diagram of the connection structure of the sealed water tank of the present invention.

[0025] Figure 5 Schematic diagram of the structure of the gas supply system of the present invention.

[0026] Figure 6 It is a structural schematic diagram of the pressure regulating system of the present invention.

[0027] Figure 7 It is a structural schematic diagram of the temperature adjustment system of the present invention.

[0028] Figure 8 It is a flow chart of the use steps of the present invention.

[0029] In the figure: 1. base;

[0030] 2. Support leg;

[0031] 3. Seal the water tank;

[0032] 4. Water inlet pipe;

[0033] 5. Dissolved oxygen content measuring system; 501. Data processor; 502. Dissolved oxygen content detector; 503. First connecting line; 504. Second connecting line; 505. First electrode detection block; 506. Second electrode detection block; 507. Solenoid check valve;

[0034] 6. Gas supply system; 601. Oxygen storage bottle; 602. Nitrogen storage bottle; 603. Air storage bottle; 604. First electromagnetic valve; 605. Second electromagnetic valve; 606. Third electromagnetic valve; 607. Three-way connecting pipe; 608. Air pump; 609. Mounting seat; 610. Air outlet pipe; 611. Gas distribution box; 612. Air outlet nozzle; 613. Sealing gasket;

[0035] 7. Pressure regulating system; 701. Pressure relief pipe; 702. Safety valve; 703. Pressure gauge;

[0036] 8. Temperature adjustment system; 801. Temperature controller; 802. Embedded connecting wire; 803. Semiconductor refrigerator; 804. Heater;

[0037] 9. Real-time control system;

[0038] 10. Water level sensor. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-8 As shown, a device and method for accurately controlling dissolved oxygen content include a base 1, support legs 2, a sealed water tank 3, a water inlet pipe 4, a dissolved oxygen content measuring system 5, a gas supply system 6, a pressure regulating system 7, a temperature regulating system 8, a real-time control system 9 and a water level sensor 10. The sealed water tank 3 is fixedly mounted on the top of the base 1 through the support legs 2, and a water inlet pipe 4 is installed on one side of the sealed water tank 3, and the water inlet pipe 4 is connected to the sealed water tank 3.

[0041] A dissolved oxygen content measuring system 5 is installed on the base 1, and the dissolved oxygen content measuring system 5 is connected to the water inlet pipe 4 and the inside of the sealed water tank 3. The dissolved oxygen content measuring system 5 is used to measure the oxygen content in the water inlet pipe 4 and the sealed water tank 3, so as to facilitate the control of the dissolved oxygen content.

[0042] An installation groove is provided on the top of the base 1, and the gas supply system 6 is fixedly installed in the installation groove, and the gas supply system 6 is connected to the inside of the sealed water tank 3. The gas supply system 6 is used to supply gas to the sealed water tank 3 to provide the required gas for controlling the dissolved oxygen content and improve the accuracy of the dissolved oxygen content control. The pressure regulating system 7 and the water level sensor 10 are both fixedly penetrated at one end of the top of the sealed water tank 3. The pressure regulating system 7 is used to regulate the pressure in the sealed water tank 3, and the water level sensor 10 is used to measure the water level height in the sealed water tank 3, which effectively ensures the safety during operation.

[0043] The temperature regulating system 8 is fixedly installed in the square grooves opened on both sides of the sealed water tank 3. The temperature regulating system 8 is used to regulate the temperature of the sealed water tank 3. The temperature control assists the control of the dissolved oxygen content, thereby further improving the accuracy of the dissolved oxygen content control. The real-time control system 9 is fixed on the top of the base 1, and the dissolved oxygen content measurement system 5, the gas supply system 6, the pressure regulating system 7, the temperature regulating system 8 and the water level sensor 10 are all electrically connected to the real-time control system 9.

[0044] like Figure 2 As shown, the dissolved oxygen content determination system 5 includes a data processor 501, a dissolved oxygen content detector 502, a first connecting line 503, a second connecting line 504, a first electrode detection block 505, a second electrode detection block 506 and an electromagnetic check valve 507. The data processor 501 and the dissolved oxygen content detector 502 are both fixedly mounted on the base 1, and the data processor 501 is electrically connected to the dissolved oxygen content detector 502 through the first connecting line 503, and the dissolved oxygen content detector 502 is electrically connected to the first electrode detection block 505 and the second electrode detection block 506 through the second connecting line 504. The first electrode detection block 505 and the second electrode detection block 506 are fixedly arranged in the water inlet pipe 4 and the sealed water tank 3, respectively. The electromagnetic check valve 507 is The check valve 507 is installed on the water inlet pipe 4, and the electromagnetic check valve 507 is located between the sealed water tank 3 and the first electrode detection block 505. When in use, the dissolved oxygen content detector 502 detects the dissolved oxygen content in the water inlet pipe 4 and the sealed water tank 3 respectively through the first electrode detection block 505 and the second electrode detection block 506. The two sets of data are compared by the data processor 501, and the compared data are transmitted to the real-time control system 9, which effectively improves the accuracy of dissolved oxygen content control. When the liquid level in the sealed water tank 3 reaches the set position, the water level sensor 10 transmits the water level data to the real-time control system 9, and the real-time control system 9 controls the electromagnetic check valve 507 to close, so as to achieve precise water inlet and ensure the accuracy of dissolved oxygen content control.

[0045] like Figure 5As shown, the gas supply system 6 includes an oxygen storage bottle 601, a nitrogen storage bottle 602, an air storage bottle 603, a first electromagnetic valve 604, a second electromagnetic valve 605, a third electromagnetic valve 606, a three-way connecting pipe 607, an air pump 608, a mounting seat 609, an air outlet pipe 610, a gas distribution box 611, an air outlet nozzle 612 and a sealing gasket 613. The oxygen storage bottle 601, the nitrogen storage bottle 602 and the air storage bottle 603 are installed in parallel on the top of the base 1 to open In the installation slot, the oxygen storage bottle 601, the nitrogen storage bottle 602 and the air storage bottle 603 are connected to the air pump 608 through the three-way connecting pipe 607, and the first electromagnetic valve 604, the second electromagnetic valve 605 and the third electromagnetic valve 606 are installed on the three-way connecting pipe 607, and the first electromagnetic valve 604, the second electromagnetic valve 605 and the third electromagnetic valve 606 are respectively located at one side of the port of the oxygen storage bottle 601, the nitrogen storage bottle 602 and the air storage bottle 603, as shown in FIG. Figure 1 As shown, the air outlet end of the air pump 608 is connected to the air outlet pipe 610, and the air distributor box 611 is installed at one end of the air outlet pipe 610, and the air distributor box 611 is communicated with the air outlet pipe 610, and the air distributor box 611 is evenly installed with air outlet nozzles 612, and the air outlet nozzles 612 are fixedly penetrated through the bottom of the sealed water tank 3 through the sealing gasket 613. When in use, the real-time control system 9 controls the first electromagnetic valve 604, the second electromagnetic valve 605 or the third electromagnetic valve 606 to open, and turns on the air pump 608 to extract oxygen, nitrogen or air, so that the gas is discharged into the air distributor box 611 through the air outlet pipe 610, and the gas is discharged into the sealed water tank 3 under the action of the air outlet nozzle 612, so as to realize the regulation of the dissolved oxygen content. The use is flexible, and the increase or decrease of the dissolved oxygen content can be effectively controlled while ensuring the accuracy of the control of the dissolved oxygen content.

[0046] like Figure 6 As shown, the pressure regulating system 7 includes a pressure relief pipe 701, a safety valve 702 and a pressure gauge 703. The pressure relief pipe 701 is fixedly installed on the top of the sealed water tank 3, and the pressure relief pipe 701 is connected to the sealed water tank 3. The safety valve 702 and the pressure gauge 703 are respectively fixedly installed on the branch pipe at the top of the pressure relief pipe 701. When in use, the pressure in the sealed water tank 3 is sensed by the pressure gauge 703. When the pressure is too high, the safety valve 702 is controlled to open for pressure relief, thereby achieving control of the pressure in the sealed water tank 3, with high safety, and preventing the influence of pressure factors on dissolved oxygen control.

[0047] like Figure 7As shown, the temperature regulation system 8 includes a temperature controller 801, an embedded connecting line 802, a semiconductor refrigerator 803 and a heater 804. The temperature controller 801 is fixed on the side wall of one end of the sealed water tank 3. The semiconductor refrigerator 803 and the heater 804 are respectively fixedly installed in square grooves opened on both sides of the sealed water tank 3, and the semiconductor refrigerator 803 and the heater 804 are electrically connected to the temperature controller 801 through the embedded connecting line 802. When in use, the temperature of the sealed water tank is controlled by controlling the semiconductor refrigerator 803 and the heater 804. When controlling the dissolved oxygen content, the temperature is controlled to assist in controlling the dissolved oxygen content, thereby further improving the control accuracy and preventing the influence of temperature factors on the control of the dissolved oxygen content.

[0048] The method for accurately controlling dissolved oxygen content comprises the following steps:

[0049] Step 1: Connect the water inlet pipe 4 to the water inlet, and the water flows through the dissolved oxygen content measuring system 5 in the water inlet pipe 4, so that the dissolved oxygen content measuring system 5 measures the dissolved oxygen content for the first time, and the water flows into the sealed water tank 3, so that the dissolved oxygen content measuring system 5 measures the dissolved oxygen content for the second time. When the water flows into the sealed water tank 3, the water level in the sealed water tank 3 is measured by the water level sensor 10. When the water level meets the use level, the water level sensor 10 transmits the water level signal to the real-time control system 9, and the real-time control system 9 controls the dissolved oxygen content measuring system 5 to stop water intake.

[0050] Step 2: The dissolved oxygen content determination system 5 determines the dissolved oxygen content in the sealed water tank 3 to obtain the dissolved oxygen content determination data. The dissolved oxygen content determination data is transmitted to the real-time control system 9. According to the dissolved oxygen content data, the gas supply system 6 is controlled by the real-time control system 9. When the dissolved oxygen content is too high, the second electromagnetic valve 605 is controlled to open by the real-time control system 9, and the air pump 608 is turned on to extract the nitrogen in the nitrogen storage bottle 602, so that the nitrogen is discharged into the gas distribution box 611 through the air outlet pipe 610, and the nitrogen is further discharged into the sealed water tank 3 through the air outlet nozzle 612 to discharge the oxygen in the water and reduce the dissolved oxygen content. When the dissolved oxygen content is too low, the use method is the same as the operation method when the dissolved oxygen content is too high, and oxygen is discharged into the sealed water tank 3 to increase the dissolved oxygen content. When the dissolved oxygen content is too low and close to the required content, the same operation method is used as when the dissolved oxygen content is too high, and air is discharged into the sealed water tank 3 to increase the dissolved oxygen content.

[0051] Step 3: When the dissolved oxygen content measuring system 5 measures and controls the dissolved oxygen content in the sealed water tank 3, the temperature controller 801 is controlled to operate the semiconductor refrigerator 803 or the heater 804 to heat or cool the sealed water tank 3 and assist in controlling the dissolved oxygen content. The pressure gauge 703 measures the pressure in the sealed water tank 3 and transmits the measured pressure data to the real-time control system 9, which controls the opening and closing of the safety valve 702 through the real-time control system 9.

[0052] The specific steps of the dissolved oxygen content accurate control method and the dissolved oxygen content measuring system 5 are as follows: the water flows through the water inlet pipe 4, the first electrode detection block 505 and the dissolved oxygen content detector 502 perform the first measurement on the dissolved oxygen content, and after entering the sealed water tank 3, the second electrode detection block 506 and the dissolved oxygen content detector 502 perform the second measurement on the dissolved oxygen content, and the two measurement data are compared by the data processor 501 and transmitted to the real-time control system 9.

[0053] The water inlet pipe 4 is connected to the water inlet, the first electrode detection block 505 and the dissolved oxygen content detector 502 perform a first measurement on the dissolved oxygen content, and after entering the sealed water tank 3, the second electrode detection block 506 and the dissolved oxygen content detector 502 perform a second measurement on the dissolved oxygen content, and the two measurement data are compared by the data processor 501 and transmitted to the real-time control system 9. According to the dissolved oxygen content data, the real-time control system 9 controls the first electromagnetic valve 604, the second electromagnetic valve 605 or the third electromagnetic valve 606 to open, and turns on the air pump 608 to extract oxygen, nitrogen or air, so that the gas is discharged into the gas distribution box 611 through the air outlet pipe 610, and the gas is discharged into the sealed water tank 3 under the action of the air outlet nozzle 612, so as to realize the regulation of the dissolved oxygen content, which is flexible to use, has good use effect, and improves the accuracy of dissolved oxygen content control.

[0054] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0055] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for accurately controlling dissolved oxygen content, characterized in that: The invention comprises a base (1), supporting legs (2), a sealed water tank (3), a water inlet pipe (4), a dissolved oxygen content measuring system (5), a gas supply system (6), a pressure regulating system (7), a temperature regulating system (8), a real-time control system (9) and a water level sensor (10), wherein the sealed water tank (3) is fixedly mounted on the top of the base (1) via the supporting legs (2), the water inlet pipe (4) is mounted on one side of the sealed water tank (3), and the water inlet pipe (4) is connected to the sealed water tank (3); The dissolved oxygen content measuring system (5) is installed on the base (1), and the dissolved oxygen content measuring system (5) is connected to the water inlet pipe (4) and the inside of the sealed water tank (3), and the dissolved oxygen content measuring system (5) is used to measure the oxygen content in the water inlet pipe (4) and the sealed water tank (3); The top of the base (1) is provided with a mounting groove, the gas supply system (6) is fixedly mounted in the mounting groove, and the gas supply system (6) is communicated with the inside of the sealed water tank (3), and the gas supply system (6) is used to supply gas to the sealed water tank (3); The pressure regulating system (7) and the water level sensor (10) are both fixedly installed on one end of the top of the sealed water tank (3); the pressure regulating system (7) is used to regulate the pressure in the sealed water tank (3); and the water level sensor (10) is used to measure the water level in the sealed water tank (3); The temperature regulating system (8) is fixedly installed in square grooves opened on both sides of the sealed water tank (3), and the temperature regulating system (8) is used to regulate the temperature of the sealed water tank (3); The real-time control system (9) is fixed on the top of the base (1), and the dissolved oxygen content measuring system (5), the gas supply system (6), the pressure regulating system (7), the temperature regulating system (8) and the water level sensor (10) are all electrically connected to the real-time control system (9); The dissolved oxygen content measuring system (5) comprises a data processor (501), a dissolved oxygen content detector (502), a first connecting line (503), a second connecting line (504), a first electrode detection block (505), a second electrode detection block (506) and an electromagnetic check valve (507); the data processor (501) and the dissolved oxygen content detector (502) are both fixedly mounted on the base (1); the data processor (501) and the dissolved oxygen content detector (502) are electrically connected via the first connecting line (503); and the dissolved oxygen content detector (502) is electrically connected to the first electrode detection block (505) and the second electrode detection block (506) via the second connecting line (504); The first electrode detection block (505) and the second electrode detection block (506) are fixedly installed in the water inlet pipe (4) and the sealed water tank (3) respectively, the electromagnetic check valve (507) is installed on the water inlet pipe (4), and the electromagnetic check valve (507) is located between the sealed water tank (3) and the first electrode detection block (505); The gas supply system (6) comprises an oxygen storage bottle (601), a nitrogen storage bottle (602), an air storage bottle (603), a first electromagnetic valve (604), a second electromagnetic valve (605), a third electromagnetic valve (606), a three-way connecting pipe (607), an air pump (608), a mounting seat (609), an air outlet pipe (610), a gas distribution box (611), an air outlet nozzle (612) and a sealing gasket (613). The oxygen storage bottle (601), the nitrogen storage bottle (602) and the air storage bottle (603) are installed in parallel in a mounting groove opened at the top of the base (1). The oxygen storage bottle (601), the nitrogen storage bottle (602) and the air storage bottle (603) are all connected to the air pump (608) via the three-way connecting pipe (607), the first electromagnetic valve (604), the second electromagnetic valve (605) and the third electromagnetic valve (606) are installed on the three-way connecting pipe (607), and the first electromagnetic valve (604), the second electromagnetic valve (605) and the third electromagnetic valve (606) are respectively located on one side of the port of the oxygen storage bottle (601), the nitrogen storage bottle (602) and the air storage bottle (603); The air outlet end of the air pump (608) is connected to the air outlet pipe (610), the air separation box (611) is installed at one end of the air outlet pipe (610), and the air separation box (611) is in communication with the air outlet pipe (610), the air outlet nozzles (612) are evenly installed on the air separation box (611), and the air outlet nozzles (612) are fixedly installed on the bottom of the sealed water tank (3) through the sealing gasket (613); The temperature regulation system (8) comprises a temperature controller (801), an embedded connecting wire (802), a semiconductor cooler (803) and a heater (804); the temperature controller (801) is fixed on a side wall at one end of the sealed water tank (3); the semiconductor cooler (803) and the heater (804) are respectively fixedly installed in square grooves opened on both sides of the sealed water tank (3); and the semiconductor cooler (803) and the heater (804) are both electrically connected to the temperature controller (801) via the embedded connecting wire (802); The pressure regulating system (7) comprises a pressure relief pipe (701), a safety valve (702) and a pressure gauge (703); the pressure relief pipe (701) is fixedly mounted on the top of the sealed water tank (3), and the pressure relief pipe (701) is connected to the sealed water tank (3); the safety valve (702) and the pressure gauge (703) are respectively fixedly mounted on a branch pipe at the top of the pressure relief pipe (701).

2. A method for accurately controlling dissolved oxygen content using the device for accurately controlling dissolved oxygen content according to claim 1, characterized in that: The steps include: Step 1: The water inlet pipe (4) is connected to the water inlet port. Water flows through the dissolved oxygen content measuring system (5) in the water inlet pipe (4), so that the dissolved oxygen content measuring system (5) performs a first dissolved oxygen content measurement. The water flows into the sealed water tank (3), so that the dissolved oxygen content measuring system (5) performs a second dissolved oxygen content measurement. When the water flows into the sealed water tank (3), the water level in the sealed water tank (3) is measured by the water level sensor (10). When the water level reaches a satisfactory use level, the water level sensor (10) transmits a water level signal to the real-time control system (9). The real-time control system (9) controls the dissolved oxygen content measuring system (5) to stop water inflow. Step 2: The dissolved oxygen content measuring system (5) measures the dissolved oxygen content in the sealed water tank (3) to obtain dissolved oxygen content measurement data, and transmits the dissolved oxygen content measurement data to the real-time control system (9). According to the dissolved oxygen content data, the gas supply system (6) is controlled by the real-time control system (9). When the dissolved oxygen content is too high, the second electromagnetic valve (605) is controlled by the real-time control system (9) to open, and the air pump (608) is turned on to extract nitrogen from the nitrogen storage bottle (602). The nitrogen is discharged into the gas distribution box (611) through the gas outlet pipe (610), and the nitrogen is further discharged into the sealed water tank (3) through the gas outlet nozzle (612), thereby discharging oxygen in the water and reducing the dissolved oxygen content. When the dissolved oxygen content is too low, the method of use is the same as the method of operation when the dissolved oxygen content is too high, and oxygen is discharged into the sealed water tank (3) to increase the dissolved oxygen content. When the dissolved oxygen content is too low and close to the required content, the same method of operation is used as when the dissolved oxygen content is too high, and air is discharged into the sealed water tank (3) to increase the dissolved oxygen content. Step 3: When the dissolved oxygen content measuring system (5) measures and controls the dissolved oxygen content in the sealed water tank (3), the temperature controller (801) is controlled to operate the semiconductor refrigerator (803) or the heater (804) to heat or cool the sealed water tank (3) to assist in controlling the dissolved oxygen content. The pressure gauge (703) measures the pressure in the sealed water tank (3) and transmits the measured pressure data to the real-time control system (9). The real-time control system (9) controls the opening and closing of the safety valve (702); The dissolved oxygen content measuring system (5) specifically comprises the following steps: water flows through the water inlet pipe (4), the first electrode detection block (505) and the dissolved oxygen content detector (502) perform a first measurement on the dissolved oxygen content, and after entering the sealed water tank (3), the second electrode detection block (506) and the dissolved oxygen content detector (502) perform a second measurement on the dissolved oxygen content, and the two measurement data are compared by the data processor (501) and transmitted to the real-time control system (9).

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