Oxygen supply temperature regulation and control system

Abstract

According to the oxygen supply temperature regulation and control system, through cooperative work of the cooling unit, the water supply unit, the draught fan, the temperature sensor and the control unit, accurate regulation and control of the oxygen supply temperature are achieved, the storage quality and the fresh-keeping effect of aquatic seafood are remarkably improved, the whole process is high in automation degree, manual intervention is reduced, and the production efficiency is improved. And meanwhile, the energy consumption is reduced, and the modern storage requirements of high efficiency and energy conservation are met.

Description

Technical Field

[0001] This utility model relates to the field of aquatic oxygen supply equipment, and in particular to an oxygen supply temperature control system. Background Technology

[0002] Seafood, as a healthy food sourced from high protein and low fat, has extremely strict requirements for its storage environment. Temperature and oxygen concentration are key factors affecting its quality and shelf life. Traditional seafood storage methods rely primarily on manual experience for temperature control and oxygen replenishment, which has significant drawbacks. First, temperature control precision is low. Simple ventilation or ice cooling methods are often used, making precise temperature control difficult and leading to large temperature fluctuations within the storage area. This can easily cause seafood to spoil due to unsuitable temperatures. Second, oxygen supply is unstable. Traditional methods often involve directly introducing air or oxygen into the storage area, lacking effective monitoring and control mechanisms. This can easily result in excessively high or low oxygen concentrations, affecting the normal respiratory metabolism of seafood and accelerating spoilage. Furthermore, traditional methods rely on manual operation with low automation. This not only results in high labor intensity and low efficiency but also makes 24-hour continuous monitoring and control difficult, further increasing storage risks. Finally, traditional cooling methods are energy-intensive, leading to high operating costs and hindering energy conservation and emission reduction. Therefore, developing an intelligent system that can precisely regulate temperature and oxygen concentration is of great significance for solving the shortcomings of traditional seafood storage methods and ensuring the quality of seafood. Utility Model Content

[0003] Therefore, an oxygen supply and temperature control system is needed to address the problem that traditional methods, which often involve directly introducing air or oxygen into the storage area, lack effective monitoring and control measures. This can easily lead to excessively high or low oxygen concentrations, affecting the normal respiratory metabolism of aquatic seafood and thus accelerating its spoilage.

[0004] To achieve the above objectives, this utility model provides an oxygen supply temperature control system, including a control unit and a fan, a cooling unit, and a water supply unit, all electrically connected to the control unit. The air outlet of the fan is connected to the air inlet of the cooling unit. The air outlet of the cooling unit is connected to a temporary holding tank for oxygen supply. A temperature sensor is provided at the air outlet of the cooling unit and is electrically connected to the control unit. The water supply unit's water supply and return ends are respectively connected to the water inlet and outlet of the cooling unit. A water pump is provided between the water supply unit and the cooling unit and is electrically connected to the control unit.

[0005] Furthermore, the fan is a variable frequency fan.

[0006] Furthermore, the water pump is a variable frequency water pump.

[0007] Furthermore, the cooling unit is a shell-and-tube air cooler, which includes a shell side for flowing air and a tube side for flowing cooling water.

[0008] Furthermore, the water supply unit includes a heat exchanger, an insulated water tank, and a pipeline pump. The inlet and outlet of the heat exchanger are connected to the outlet and inlet of the insulated water tank, respectively. The pipeline pump is located between the heat exchanger and the insulated water tank.

[0009] Furthermore, the heat exchanger is a plate heat exchanger.

[0010] Furthermore, the water supply unit also includes a cooling tower, a condenser, an oil separator, a compressor, and a gas-liquid separator; the cooling tower condenses the air in the condenser with water through a circulation pipeline, and the condenser is connected in sequence to a plate heat exchanger, a gas-liquid separator, a compressor, and an oil separator to form a cold air circulation.

[0011] Furthermore, a bypass pipe is also provided, through which the air outlet of the blower is connected to the temporary holding tank for oxygen supply.

[0012] Unlike existing technologies, the above-mentioned technical solution achieves precise control of oxygen supply temperature through the coordinated work of the cooling unit, water supply unit, fan, temperature sensor and control unit, which significantly improves the storage quality and preservation effect of aquatic seafood. The whole process is highly automated, reduces human intervention, and reduces energy consumption, meeting the needs of efficient and energy-saving modern storage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the oxygen supply temperature control system described in a specific embodiment;

[0014] Figure 2 This is a schematic diagram of the oxygen supply temperature control system according to another specific embodiment;

[0015] Figure 3 This is a partial structural diagram of the water supply system described in another specific embodiment;

[0016] Figure 4 A schematic diagram of the oxygen supply temperature control system with a bypass pipe in another specific embodiment;

[0017] Figure 5 This is a schematic diagram of the overall structure of the oxygen supply temperature control system according to another specific embodiment.

[0018] Explanation of reference numerals in the attached figures:

[0019] 10. Fan; 20. Cooling unit; 30. Water supply unit; 40. Temperature sensor; 41. Water pump; 301. Heat exchanger; 302. Insulated water tank; 303. Pipeline pump; 304. Cooling tower; 305. Condenser; 306. Oil separator; 307. Compressor; 308. Gas-liquid separator; 50. Bypass pipe. Detailed Implementation

[0020] To explain in detail the technical content, structural features, objectives, and effects of the technical solution, the following description is provided in conjunction with specific embodiments and accompanying drawings.

[0021] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0022] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0023] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0024] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0025] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0026] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0027] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0028] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0029] Please see Figures 1 to 5 This embodiment provides an oxygen supply temperature control system, including a control unit and a fan 10, a cooling unit 20, and a water supply unit 30, all electrically connected to the control unit. The air outlet of the fan 10 is connected to the air inlet of the cooling unit 20. The air outlet of the cooling unit 20 is connected to a temporary holding tank for oxygen supply. A temperature sensor 40 is provided at the air outlet of the cooling unit 20, and the temperature sensor 40 is electrically connected to the control unit. The water supply unit 30 has its water supply and return ends connected to the water inlet and outlet of the cooling unit 20, respectively. A water pump 41 is provided between the water supply unit 30 and the cooling unit 20, and the water pump 41 is electrically connected to the control unit.

[0030] In the oxygen supply temperature control system, the control unit can be a PLC (e.g., Siemens S7-1200 series) or a microcontroller (e.g., Arduino Mega). The control unit can receive signals from the temperature sensor 40 and automatically adjust the operating status of the fan 10, cooling unit 20, and water pump 41 according to preset program logic to achieve precise temperature and oxygen concentration control. Specifically, when the total gas consumption of gas-consuming equipment such as the temporary holding tank downstream of the cooling unit 20 decreases, and the fan 10 reduces its gas supply through frequency conversion, the temperature sensor 40 at the outlet of the cooling unit 20 detects a low temperature and controls the water supply unit 30 to reduce its water supply, thus maintaining the air temperature output by the cooling unit 20 within the required temperature range.

[0031] The blower 10 can be either a centrifugal blower 10 with variable frequency function or an axial flow blower 10. The centrifugal blower 10 generates a stable airflow through a rotating impeller and is suitable for large air volume requirements, while the axial flow blower 10 achieves efficient ventilation through axial airflow and is suitable for occasions with limited space. Preferably, the blower 10 can be a Roots blower 10. The Roots blower 10 is a high-efficiency positive displacement blower 10, whose structure mainly consists of two meshing impellers (male and female impellers). These two impellers rotate synchronously inside the casing. Through precise cooperation, gas is drawn in through the inlet, and then compressed along the channel inside the casing and discharged through the outlet under the push of the impellers. The rotor of the Roots blower 10 is supported by bearings to reduce friction and ensure its smooth operation. The sealing system ensures that the gas does not leak during compression, maintaining the high efficiency of the blower 10. The gearbox is responsible for transmitting the power of the motor to the rotor through the gear transmission system, driving its rotation, thereby achieving stable oxygen supply.

[0032] The cooling unit 20 can employ a shell-and-tube heat exchanger 301 or a plate heat exchanger 301. The shell-and-tube heat exchanger 301 achieves cooling through heat exchange between the shell-side air and the tube-side chilled water. The shell-and-tube heat exchanger 301 can be vertical or horizontal, while the plate heat exchanger 301 achieves cooling through efficient heat exchange between multiple layers of metal plates. The water supply unit 30 can be configured with an open-loop circulating water system (including a cooling tower 304 and a water pump 41) or a closed-loop circulating water system (using a cooling unit and a circulating water pump 41). The former cools the water through evaporation in the cooling tower 304, while the latter lowers the water temperature through a refrigeration cycle. The temperature sensor 40 can be either a PT100 or a K-type thermocouple. The PT100 offers high accuracy and stability, suitable for precise temperature control, while the K-type thermocouple has a fast response speed. The water pump 41 can be a centrifugal pump or a gear pump with variable frequency drive functionality.

[0033] Taking the cooling unit 20, which uses a shell-and-tube heat exchanger 301, as an example, the shell side is used for the air output from the fan 10, while the tube side carries low-temperature chilled water. The low-temperature chilled water is delivered to the cooling unit 20 via the water pump 41 of the water supply unit 30. In this system, the air output from the fan 10 first enters the shell side of the cooling unit 20 through the oxygen supply inlet pipe. Through heat exchange with the low-temperature chilled water in the tube side, the air temperature is reduced to a preset target range. The reduced air is then delivered to the temporary holding tank at the rear end through the air outlet of the cooling unit 20. A temperature sensor 40 is installed at the air outlet of the cooling unit 20 to monitor the air temperature after it has been cooled by the cooling unit 20 in real time and to feed the temperature data back to the control unit. When the total gas consumption of gas-consuming equipment such as temporary holding tanks decreases, the control unit can control the fan 10 to reduce the gas supply. Since the amount of air received by the cooling unit 20 decreases, but the heat exchange process remains unchanged, the air temperature output by the cooling unit 20 will be lower. The temperature sensor 40 will detect the low air temperature and transmit this signal to the control unit. After receiving the low temperature signal, the control unit can immediately adjust the water pump 41 of the water supply unit 30. By reducing the output power of the water pump 41, the supply of chilled water is reduced, so that the supply of chilled water matches the supply of air. This allows the air temperature output by the cooling unit 20 to be stably maintained within the required range, avoiding temperature fluctuations caused by changes in gas consumption.

[0034] This new system achieves precise control of oxygen supply temperature through the coordinated operation of the cooling unit 20, water supply unit 30, fan 10, temperature sensor 40 and control unit, which significantly improves the storage quality and preservation effect of aquatic seafood. The whole process is highly automated, reduces human intervention, and reduces energy consumption, meeting the needs of efficient and energy-saving modern storage.

[0035] In some embodiments, the fan 10 is a variable frequency fan 10. The variable frequency fan 10 controls the airflow output by adjusting the motor speed, dynamically adjusting the air supply according to the actual needs of air-consuming equipment such as holding tanks. When air consumption decreases, the fan 10 reduces the air supply by lowering the frequency converter, thus avoiding energy waste; when air consumption increases, the fan 10 increases the frequency to increase the air supply, ensuring that the oxygen concentration in the holding tank remains at a suitable level. Furthermore, the variable frequency fan 10 works in conjunction with the control unit, responding in real-time to feedback signals from the temperature sensor 40 and the oxygen concentration sensor, achieving precise oxygen supply and temperature control. This design not only improves the system's energy efficiency ratio but also reduces operating noise, extends the service life of the fan 10, and provides a more stable and reliable environmental guarantee for the storage of aquatic seafood.

[0036] In some embodiments, the water pump 41 is a variable frequency water pump 41. In this system, the water pump 41 can be a variable frequency water pump 41, which can control the water flow rate by adjusting the motor speed, and can dynamically adjust the supply of chilled water according to the actual needs of the cooling unit 20. When the temperature sensor 40 at the outlet of the cooling unit 20 detects that the air temperature is too low, the control unit will reduce the frequency of the water pump 41 and reduce the flow rate of chilled water, thereby avoiding overcooling; conversely, when the temperature is too high, the control unit will increase the frequency of the water pump 41 and increase the flow rate of chilled water to ensure that the air temperature is stable within the preset range. This variable frequency control method not only improves the accuracy of temperature regulation, but also significantly reduces energy consumption, meeting the requirements of energy conservation and emission reduction.

[0037] In some embodiments, the cooling unit 20 is a shell-and-tube air cooler, comprising a shell side for flowing air and a tube side for flowing cooling water. The cooling unit 20 employs a shell-and-tube air cooler, such as Alfa Laval's vertical or horizontal shell-and-tube heat exchanger 301. The shell side is used for the air output from the fan 10, while the tube side circulates chilled water. The chilled water is delivered to the tube side by a water pump 41 from the water supply unit 30, where it exchanges heat with the air in the shell side, thereby reducing the air temperature to the desired range. Shell-and-tube coolers are characterized by their compact structure and high heat exchange efficiency, meeting the precise temperature control requirements of aquatic product storage. Furthermore, the shell-and-tube design of the cooling unit 20 facilitates maintenance and cleaning, further improving the system's reliability and service life.

[0038] In some embodiments, the water supply unit 30 includes a heat exchanger 301, an insulated water tank 302, and a pipeline pump 303. The inlet and outlet of the heat exchanger 301 are connected to the outlet and inlet of the insulated water tank 302, respectively. The pipeline pump 303 is located between the heat exchanger 301 and the insulated water tank 302. The water supply unit 30 consists of the heat exchanger 301, the insulated water tank 302, and the pipeline pump 303. The inlet of the heat exchanger 301 is connected to the outlet of the insulated water tank 302, and the outlet is connected to the inlet of the insulated water tank 302, forming a closed water circulation system. The pipeline pump 303 is located between the heat exchanger 301 and the insulated water tank 302 and is used to drive the chilled water to circulate in the system. The insulated water tank 302 is used to store low-temperature chilled water to ensure that the cooling unit 20 can continuously obtain a stable low-temperature water source. This design not only improves the system's operating efficiency but also reduces water temperature fluctuations, further ensuring the stability of the cooling effect.

[0039] In some embodiments, the heat exchanger 301 in the water supply unit 30 is a plate heat exchanger 301, such as the plate heat exchanger 301 of an APV (Automatic Water Purifier). The plate heat exchanger 301 achieves efficient heat exchange through narrow channels between multiple layers of metal plates, offering advantages such as high heat transfer efficiency and a small footprint. In the system, the plate heat exchanger 301 is used to lower the temperature of the chilled water in the insulated water tank 302, ensuring that the cooling unit 20 receives a sufficiently low-temperature water source. The modular design of the plate heat exchanger 301 also facilitates the expansion or adjustment of the heat exchange area according to actual needs, improving the system's flexibility and adaptability.

[0040] In some embodiments, the water supply unit 30 further includes a cooling tower 304, a condenser 305, an oil separator 306, a compressor 307, and a gas-liquid separator 308. The cooling tower 304 condenses the air in the condenser 305 with water through a circulation pipeline. The condenser 305 is sequentially connected to the plate heat exchanger 301, the gas-liquid separator 308, the compressor 307, and the oil separator 306 to form a cold air circulation. The cooling tower 304 condenses the air in the condenser 305 with water through the circulation pipeline, reducing the temperature of the refrigerant. The condenser 305 is sequentially connected to the plate heat exchanger 301, the gas-liquid separator 308, the compressor 307, and the oil separator 306 to form a cold air circulation. The compressor 307 is used to pressurize and transport the gas, enabling gas circulation and heat exchange. The oil separator 306 is used to remove oil from the gas, and the gas-liquid separator 308 ensures that the gas does not contain liquid entering the plate heat exchanger 301. It not only improves cooling efficiency, but also enhances the stability and reliability of the system.

[0041] In some embodiments, a bypass pipe 50 is also provided, through which the air outlet of the blower 10 is connected to the holding tank for oxygen supply. The bypass pipe 50 ensures that the blower 10 can still supply air to the holding tank when the cooling unit 20 malfunctions or is under maintenance, preventing damage to aquatic products due to oxygen deficiency. Furthermore, the bypass pipe 50 can also directly supply uncooled air to the holding tank during system startup or low-load operation, reducing the load on the cooling unit 20 and thus lowering energy consumption. This improves system redundancy and reliability, further ensuring the safety of aquatic product storage.

[0042] It should be noted that the attached document is for reference only. Figure 1-5The various components are connected by pipes. Pipes used for air delivery can be made of corrosion-resistant and pressure-resistant materials, such as stainless steel or PVC, to ensure long-term operational stability and hygiene. Air ducts extend from the fan outlet, pass through the cooling unit, and are then delivered to the holding tank. To minimize pressure loss during air delivery, the pipe design should be as smooth as possible, avoiding excessive bends and diameter changes. The inner walls of the pipes must be kept clean to prevent impurities from affecting air quality and system efficiency. Pipes used for chilled water delivery can be made of PVC and wrapped with insulation materials, such as polyurethane foam insulation pipes, to reduce heat loss during transport. Chilled water pipes extend from the water pump in the supply unit, pass through the cooling unit, and return to the supply unit, forming a closed-loop system. Pipe connections use well-sealing flanges or quick-connect fittings to prevent chilled water leakage. Furthermore, the uniformity and stability of the water flow in the chilled water pipes must be considered to avoid reduced cooling efficiency due to poor flow.

[0043] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this utility model patent.

Claims

1. An oxygen supply temperature control system, characterized in that, The system includes a control unit and a fan, a cooling unit, and a water supply unit, all electrically connected to the control unit. The air outlet of the fan is connected to the air inlet of the cooling unit. The air outlet of the cooling unit is connected to a temporary holding tank for oxygen supply. A temperature sensor is installed at the air outlet of the cooling unit and is electrically connected to the control unit. The water supply unit has a water supply end and a water return end connected to the water inlet and water outlet of the cooling unit, respectively. A water pump is installed between the water supply unit and the cooling unit and is electrically connected to the control unit.

2. The oxygen supply temperature control system according to claim 1, characterized in that: The fan is a variable frequency fan.

3. The oxygen supply temperature control system according to claim 1, characterized in that: The water pump is a variable frequency water pump.

4. The oxygen supply temperature control system according to claim 1, characterized in that: The cooling unit is a shell-and-tube air cooler, which includes a shell side for flowing air and a tube side for flowing cooling water.

5. The oxygen supply temperature control system according to claim 1, characterized in that: The water supply unit includes a heat exchanger, an insulated water tank, and a pipeline pump. The inlet and outlet of the heat exchanger are connected to the outlet and inlet of the insulated water tank, respectively. The pipeline pump is located between the heat exchanger and the insulated water tank.

6. The oxygen supply temperature control system according to claim 5, characterized in that: The heat exchanger is a plate heat exchanger.

7. The oxygen supply temperature control system according to claim 6, characterized in that: The water supply unit also includes a cooling tower, a condenser, an oil separator, a compressor, and a gas-liquid separator; the cooling tower condenses the air in the condenser through a circulation pipeline, and the condenser is connected in sequence to a plate heat exchanger, a gas-liquid separator, a compressor, and an oil separator to form a cold air circulation.

8. The oxygen supply temperature control system according to claim 1, characterized in that: A bypass pipe is also provided, through which the air outlet of the blower is connected to the temporary holding tank for oxygen supply.

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