Feed ventilating and cooling system

Abstract

The invention discloses a feed ventilation cooling system which comprises a fresh air combined type air handling unit, a circulating cooling combined type air handling unit and a cooling room, and the fresh air combined type air handling unit is used for filtering outside air and then feeding the outside air into the circulating cooling combined type air handling unit. The circulating cooling combined type air handling unit sterilizes fed air and then sends the air to the cooling room, a mixed flow fan unit is arranged in the cooling room, the cooling room is used for containing cooked feed, and an exhaust fan is connected to the cooling room and used for exhausting air in the cooling room. Cooked feed is put into the cooling room, filtered and purified by the fresh air combined type air processing unit and disinfected and cooled by the circulating cooling combined type air processing unit, the feed is fed into the cooling room to be cooled, and air in the cooling room is discharged to the outside through the exhaust fan. The temperature of the feed in the cooling room is reduced to the preset temperature, and the feed cooling efficiency is greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of ventilation system technology, and specifically relates to a feed ventilation and cooling system. Background Technology

[0002] Feed is a general term for the food consumed by all domesticated animals. In a narrower sense, feed mainly refers to the food consumed by animals raised in agriculture or animal husbandry. Feed includes more than ten kinds of feed ingredients such as soybeans, soybean meal, corn, fish meal, amino acids, miscellaneous meals, whey powder, oils, meat and bone meal, grains, and feed additives.

[0003] Artificial feed sericulture has changed the traditional method of silkworm rearing, which previously relied entirely on mulberry trees for feed, eliminating the limitations imposed by seasons and natural conditions. This reduces the workload for silkworm farmers, increases the number of silkworms raised, and boosts economic income. Furthermore, the implementation of artificial feed sericulture technology has lowered the difficulty of mechanizing sericulture, providing the necessary conditions for its full mechanization.

[0004] Cooking is the final step in feed production. The cooked feed is at a high temperature, and to avoid adverse effects of heat on the raw materials, the heat needs to be removed. Currently, the method used is to place the cooked feed in a room at room temperature to cool down. However, natural cooling at room temperature is slow, which prolongs the production cycle and affects overall production efficiency. Furthermore, during the prolonged cooling process, the hot and humid feed is exposed to the air, making it prone to microbial growth, leading to feed spoilage or a decline in hygiene standards. Summary of the Invention

[0005] The purpose of this invention is to solve the aforementioned technical problems existing in the prior art and to provide a feed ventilation and cooling system. This system involves placing cooked feed into a cooling room, then controlling the operation of a fresh air handling unit and a circulating cooling unit. Outside air is filtered and purified by the fresh air handling unit before being sent to the circulating cooling unit for disinfection and cooling. This air is then sent into the cooling room to cool the cooked feed. The air in the cooling room is then exhausted to the outside by an exhaust fan, thus lowering the feed in the cooling room to a predetermined temperature. This significantly improves feed cooling efficiency, shortens the feed production cycle, and, simultaneously, reduces the exposure time of the feed to high temperature and humidity, significantly inhibiting microbial growth and reducing the risk of feed spoilage or a decline in hygiene indicators, thereby ensuring the safety and stability of the feed product.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A feed ventilation and cooling system includes a fresh air combined air handling unit, a circulating cooling combined air handling unit, and a cooling room. The fresh air combined air handling unit filters outside air and sends it into the circulating cooling combined air handling unit. The circulating cooling combined air handling unit disinfects the incoming air and sends it out to the cooling room. The cooling room is equipped with a mixed flow fan unit. The cooling room is used to place cooked feed. The cooling room is connected to an exhaust fan to exhaust the air in the cooling room. This invention places cooked feed into a cooling room, then controls the operation of a fresh air combined air handling unit and a circulating cooling combined air handling unit. Outside air is filtered and purified by the fresh air combined air handling unit before being sent to the circulating cooling combined air handling unit for disinfection and cooling. It is then sent into the cooling room to cool the cooked feed. The air in the cooling room is exhausted to the outside by an exhaust fan, thus reducing the feed temperature to a predetermined level. This significantly improves feed cooling efficiency, shortens the feed production cycle, and reduces the exposure time of feed to high temperature and humidity, significantly inhibiting microbial growth and reducing the risk of feed spoilage or a decline in hygiene indicators, which helps ensure the safety and stability of feed products.

[0007] Furthermore, the fresh air combined air handling unit and the circulating cooling combined air handling unit are connected by an air supply duct. The air supply duct is equipped with an air valve, which is used to control the opening and closing of the air supply duct. The other end of the fresh air combined air handling unit is equipped with an air inlet duct, and a duct-type temperature and humidity sensor is connected to the air inlet duct. A duct-type temperature and humidity sensor is also installed at the end of the air supply duct near the circulating cooling combined air handling unit.

[0008] By installing a single air valve and two duct-type temperature and humidity sensors, precise control of the fresh air introduction path and monitoring of the air condition throughout the entire process are achieved. The single air valve can flexibly adjust or even shut off the fresh air volume.

[0009] Temperature and humidity sensor one monitors the parameters of the untreated raw fresh air in real time, providing initial data for system prediction and adjustment; temperature and humidity sensor two monitors the air condition after being treated by the fresh air handling unit. By comparing the data with that of sensor one, the treatment effect of the fresh air handling unit can be evaluated in real time, and a precise basis for setting the operating parameters of the subsequent circulating cooling unit can be provided. This ensures that the air delivered to the cooling room is always within the optimal range of temperature, humidity and cleanliness, thereby improving the stability of the cooling process and the reliability of feed quality assurance from the source.

[0010] Furthermore, the circulating cooling combined air handling unit is connected to the cooling room through air supply duct 2. Air supply duct 2 is equipped with air supply static pressure sensor 1, and air supply duct temperature and humidity sensor 3 is installed at the end of air supply duct 2 near the cooling room.

[0011] By installing a static pressure sensor and a duct-type temperature and humidity sensor at the second air supply duct, the stability of the system operation and the level of control precision are significantly improved.

[0012] The air supply static pressure sensor can monitor the air supply power status to the cooling room in real time. Its data can be used to adjust the frequency of the second fan section in the circulating cooling unit to ensure that the air supply pressure is stable at the set value. This avoids insufficient or fluctuating air supply due to changes in pipe resistance or dust accumulation in the filter, thereby ensuring uniform airflow organization and consistent feed cooling rate in the cooling room.

[0013] The duct-type temperature and humidity sensor directly detects the final state of the air about to enter the cooling room. This is the final verification of the effect of the air after being processed by the circulating cooling unit. It ensures that the air parameters sent into the cooling room strictly meet the process requirements, providing the most direct guarantee for the rapid and safe cooling of feed.

[0014] Furthermore, the cooling room and the exhaust fan are connected by an air supply duct three. The air supply duct three is equipped with an air valve two. An air supply static pressure sensor two is installed at the end of the air supply duct near the cooling room. The air valve two is used to control the opening and closing of the air supply duct three. The exhaust fan is equipped with an exhaust duct that discharges air to the outside. A duct-type temperature and humidity sensor four is installed at the exhaust duct. A fan section differential pressure switch one is connected between the air supply duct three and the exhaust duct. The air supply duct two is connected to the top of the cooling room, and the air supply duct three is connected to the corresponding bottom of the cooling room.

[0015] By setting up a second air supply static pressure sensor and a fourth duct-type temperature and humidity sensor, intelligent monitoring and regulation of the air pressure and exhaust status in the cooling room are achieved, effectively ensuring the system's hygiene, safety, and energy-saving operation.

[0016] Air valve two can control and adjust the exhaust volume or even completely close the exhaust path. Supply air static pressure sensor two monitors the exhaust side pressure in the cooling room. Working in conjunction with supply air static pressure sensor one, it can precisely control the room's pressure differential, creating a reasonable directional airflow and protecting the cooling environment. Fan section differential pressure switch one directly monitors the operating load status of the exhaust fan itself, providing timely warnings of fan failure or exhaust duct blockage. Duct-type temperature and humidity sensor four monitors the parameters of the final exhaust gas, which can be used to assess the system's heat and moisture exchange efficiency and serve as an auxiliary basis for determining whether the feed cooling process is complete. It also ensures that the exhaust meets environmental protection requirements, forming a complete, controllable, and monitorable exhaust closed loop.

[0017] By employing an upward-flowing and downward-returning airflow system, this system cleverly utilizes the physical principle that hot air naturally rises and cold air naturally sinks. Cooled, dry air is introduced from the top of the room, slowly descending to fully cover the surface of the feed pile and gradually permeating it. The hot, humid air generated during the feed cooling process, due to its lower density, naturally rises and is ultimately effectively drawn away through the exhaust vents at the bottom of the room. This model not only achieves three-dimensional cooling of the entire space from top to bottom but also directly removes the hottest and most humid air through bottom exhaust, effectively inhibiting the accumulation and recirculation of hot and humid air above the feed, significantly improving the overall efficiency of cooling and dehumidification. Simultaneously, it helps maintain relatively lower humidity in the upper area of ​​the feed pile, further inhibiting microbial activity on the feed surface and enhancing the system's reliability and cooling effect.

[0018] Furthermore, air supply duct three is connected to air supply duct two via a connecting pipe, and the connecting pipe is equipped with an air valve three, which is used to control the opening and closing of the connecting pipe.

[0019] By adding a connecting pipe with a third air valve, a flexible air recirculation operation mode was introduced into the system. When cooling the cooked feed, valve three is closed, and valves one and two are opened, allowing outside air to be filtered and purified by the fresh air combined air handling unit before being sent to the circulating cooling combined air handling unit for cooling and disinfection. The air is then sent into the cooling room to cool the feed inside. The air in the cooling room is exhausted to the outside by an exhaust fan, achieving rapid cooling of the feed. When the temperature and humidity in the cooling room reach the preset standard, i.e., when the feed temperature drops to the preset standard, valves one and two are closed, and valve three is opened, allowing the circulating cooling combined air handling unit to circulate and disinfect the cooling room, ensuring the hygiene and safety of the feed.

[0020] Furthermore, the fresh air combined air handling unit includes a pre-filter section, a medium-efficiency section, a fan section 1, a high-efficiency section, and an air outlet section 1 arranged sequentially. The pre-filter section is used to perform preliminary filtration of the air entering the fresh air combined air handling unit, the medium-efficiency section performs secondary filtration, the fan section 1 controls the outside air to be transported to the circulating cooling combined air handling unit after entering the fresh air combined air handling unit, the high-efficiency section is used to perform high-efficiency filtration of the air, and the air outlet section 1 is used to transport the purified air in the fresh air combined air handling unit to the circulating cooling combined air handling unit.

[0021] The fresh air combined air handling unit adopts a multi-stage progressive filtration structure, which forms a deep purification barrier for the air entering the fresh air combined air handling unit.

[0022] The primary filter first intercepts large particles in the atmosphere, such as dust, protecting the subsequent secondary filter and extending its lifespan; the secondary filter further removes smaller particles; and finally, the high-efficiency filter performs fine filtration, effectively capturing fine particles and even some bacteria.

[0023] This three-stage filtration system ensures that the air supplied to the subsequent circulating cooling combined air handling unit has extremely high cleanliness, fundamentally reducing the risk of dust and other pollutants entering the cooling room and contaminating the feed. At the same time, it greatly protects the surface cooler fins and disinfection section components inside the circulating cooling combined air handling unit, preventing dust accumulation, bacterial growth, or impact on heat exchange and disinfection efficiency. This reduces equipment maintenance frequency and energy consumption, laying a solid air source foundation for the production of high-quality hygienic feed.

[0024] Furthermore, the circulating cooling combined air handling unit includes a mixing section, a surface cooling section, a disinfection section, a second fan section, and a second outlet section arranged in sequence. The mixing section is used to mix the air entering the circulating cooling combined air handling unit. The surface cooling section is used to cool the mixed air. The disinfection section is used to disinfect the cooled air. The second fan section controls the air to be delivered from the mixing section to the second outlet section. The second outlet section delivers the air in the circulating cooling combined air handling unit to the cooling room. A second fan section differential pressure switch is connected between the disinfection section and the second outlet section.

[0025] The mixing section ensures uniform mixing of fresh air and potential return air, guaranteeing consistent air temperature and humidity and improving the heat exchange efficiency of the subsequent cooling section. The cooling section is responsible for the core cooling and dehumidification functions, rapidly reducing air temperature to provide powerful cooling. The disinfection section, located after the cooling section, thoroughly sterilizes the cooled air, preventing secondary contamination during cooling and ensuring that the air supplied to the cooling room is low-temperature and sterile—crucial for inhibiting microbial growth on feed surfaces. The differential pressure switch in the fan section specifically monitors pressure changes before and after the disinfection section, sensitively reflecting the clogging of the disinfection section's filter components or changes in the disinfection device's resistance to airflow. This timely maintenance reminder ensures stable disinfection effects and system airflow, a key safety design feature guaranteeing the continuous effectiveness of the disinfection process.

[0026] Furthermore, ventilation cavities are provided on both the upper and lower side walls of the cooling room. Dividing rods are evenly arranged in the ventilation cavities, dividing the ventilation cavities into several interconnected partition cavities. Each partition cavity is equipped with a mixed-flow fan unit.

[0027] The interconnected partitions formed by the dividing rods ensure uniform airflow distribution within the ventilation chamber, preventing pressure concentration or airflow short-circuiting. Each partition chamber contains an independently installed mixed-flow fan unit, enabling modular, independent, and precise control of the supply and exhaust airflow from both the upper and lower sides. This design allows cooling airflow to penetrate the feed layer from top to bottom, effectively solving the problems of uneven cooling and slow heat dissipation in the center that are common with traditional single-sided air supply, thereby improving cooling efficiency and uniformity.

[0028] Furthermore, the upper and lower side walls of the cooling room are equipped with limiting components corresponding to the mixed-flow fan unit. The limiting components include columns and limiting plates. The columns are fixed to the upper and lower side walls of the cooling room at the four corners corresponding to the mixed-flow fan unit. One end of the limiting plate is rotatably connected to the column. The top of the column is provided with a threaded hole, and a locking screw is screwed into the threaded hole. The locking screw is tightened on the limiting plate, and the other end of the limiting plate abuts against the mixed-flow fan unit.

[0029] The rotating limit disc, in conjunction with the locking screw, enables convenient clamping and quick release of the mixed-flow fan unit, greatly simplifying the installation, disassembly, and maintenance process. The four-corner positioning layout ensures even force distribution on the unit, preventing vibration or displacement during operation. The tightening force of the locking screw is adjustable, ensuring reliable fastening while preventing damage to the fan unit or ventilation cavity structure due to excessive compression; significantly improving the ease of maintenance and long-term operational stability of the equipment.

[0030] Furthermore, the mixed-flow fan unit includes a fan, a mounting plate, a base plate, and a sealing plate. One side of the mounting plate has a raised section forming a mounting cavity, in which the fan is housed. The other side of the mounting plate has a base plate with evenly distributed ventilation holes. Each of the four corners of the sealing plate corresponding to one side of the mounting plate has an adjusting screw. The adjusting screw passes through the mounting plate, and both ends of the adjusting screw have adjusting nuts. The adjusting nuts are tightened onto both sides of the mounting plate. A support platform is fixedly connected to the bottom of the adjusting screw, and the support platform rests against the ventilation cavity. A handle is provided on the other side of the sealing plate, and positioning blocks are provided at both ends of the sealing plate. Positioning grooves are provided on the upper and lower side walls of the cooling chamber, and the positioning blocks are matched with the positioning grooves. The sealing plate has evenly distributed ventilation holes.

[0031] By adjusting the screw and nut, the distance between the fan, the sealing plate, and the ventilation cavity can be flexibly adjusted, thereby optimizing the airflow outlet angle and ensuring a sealed contact surface to prevent air leakage. The matching setting of the positioning block and the positioning groove enables the unit to be quickly and accurately positioned and installed. The design of ventilation holes one and two on the base plate and the sealing plate ensures smooth airflow. The handle facilitates operation, and the support platform enhances the stability of the unit within the cavity.

[0032] The present invention, by adopting the above-described technical solution, has the following beneficial effects: This invention places cooked feed into a cooling room, then controls the operation of a fresh air combined air handling unit and a circulating cooling combined air handling unit. Outside air is filtered and purified by the fresh air combined air handling unit before being sent to the circulating cooling combined air handling unit for disinfection and cooling. It is then sent into the cooling room to cool the cooked feed. The air in the cooling room is exhausted to the outside by an exhaust fan, thus reducing the feed temperature to a predetermined level. This significantly improves feed cooling efficiency, shortens the feed production cycle, and reduces the exposure time of feed to high temperature and humidity, significantly inhibiting microbial growth and reducing the risk of feed spoilage or a decline in hygiene indicators, which helps ensure the safety and stability of feed products.

[0033] This invention cleverly utilizes the physical principle that hot air naturally rises and cold air naturally sinks by employing an airflow organization method that supplies air from the top and returns it from the bottom. Cooled, dry air is introduced from the top of the room, slowly descending to fully cover the surface of the feed pile and gradually permeating it. The hot, humid air generated during the feed cooling process rises naturally due to its lower density and is ultimately effectively drawn away through the exhaust vents at the bottom of the room. This mode not only achieves three-dimensional cooling of the entire space from top to bottom but also directly removes the hottest and most humid air through bottom exhaust, effectively inhibiting the accumulation and recirculation of hot and humid air above the feed, significantly improving the overall efficiency of cooling and dehumidification. Simultaneously, it helps maintain relatively lower humidity in the upper area of ​​the feed pile, further inhibiting microbial activity on the feed surface and enhancing the system's reliability and cooling effect.

[0034] This invention relates to a mixed-flow fan unit comprising a fan, a mounting plate, a base plate, and a sealing plate. One side of the mounting plate has a raised mounting cavity where the fan is housed. The other side of the mounting plate has a base plate with evenly distributed ventilation holes. Each of the four corners of the sealing plate corresponding to one side of the mounting plate has an adjusting screw, which passes through the mounting plate. Both ends of the adjusting screw have adjusting nuts, which are tightened onto both sides of the mounting plate. A support platform is fixedly connected to the bottom of the adjusting screw, resting against the ventilation cavity. A handle is located on the other side of the sealing plate, and positioning blocks are located at both ends. Positioning grooves are correspondingly provided on the partition rod and the upper and lower side walls of the cooling chamber. The positioning blocks and positioning grooves are matched. The sealing plate has evenly distributed ventilation holes. By adjusting the screws and nuts, the distance between the fan, the sealing plate, and the ventilation cavity can be flexibly adjusted, thereby optimizing the airflow outlet angle and ensuring a sealed contact surface to prevent air leakage. The matching of the positioning blocks and positioning grooves enables rapid and precise alignment and installation of the unit. The design of ventilation holes one and two on the base plate and sealing plate ensures smooth airflow; the handle is easy to operate, and the support platform enhances the stability of the unit inside the cavity. Attached Figure Description

[0035] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a feed ventilation and cooling system according to the present invention; Figure 2 This is a schematic diagram of the connection between the cooling room and the mixed-flow fan unit in this invention; Figure 3 This is a schematic diagram of the cooling room structure in this invention; Figure 4 This is an exploded view of the limiting component in this invention; Figure 5 This is a schematic diagram of the mixed-flow fan unit in this invention; Figure 6 This is a schematic diagram of the mounting plate in this invention; Figure 7 This is an exploded view of the mounting plate, fan, and base plate in this invention.

[0036] In the diagram: 1-Fresh air combined air handling unit; 2-Circulating cooling combined air handling unit; 3-Cooling room; 4-Exhaust fan; 5-Supply air duct 1; 6-Air valve 1; 7-Inlet air duct; 8-Duct-type temperature and humidity sensor 1; 9-Duct-type temperature and humidity sensor 2; 10-Supply air duct 2; 11-Supply air static pressure sensor 1; 12-Duct-type temperature and humidity sensor 3; 13-Supply air duct 3; 14-Air valve 2; 15-Supply air static pressure sensor 2; 16-Exhaust air duct; 17-Duct-type temperature and humidity sensor 4; 18-Fan section differential pressure switch 1; 19-Connecting pipe; 20-Air valve 3; 21-Primary filter section; 22-Medium filter section; 23-Fan section 1; 2 4-High-efficiency section; 25-Outlet section one; 26-Mixing section; 27-Cooling section; 28-Disinfection section; 29-Fan section two; 30-Outlet section two; 31-Duct-type temperature and humidity sensor five; 32-Mixed flow fan unit; 33-Fan section differential pressure switch two; 34-Ventilation cavity; 35-Separator rod; 36-Limit assembly; 37-Column; 38-Limit plate; 39-Threaded hole; 40-Locking screw; 41-Fan; 42-Mounting plate; 43-Base plate; 44-Sealing plate; 45-Mounting cavity; 46-Ventilation hole one; 47-Adjusting screw; 48-Adjusting nut; 49-Support platform; 50-Handle; 51-Positioning block; 52-Positioning groove; 53-Ventilation hole two. Detailed Implementation

[0037] like Figures 1 to 7As shown, this invention provides a feed ventilation and cooling system, comprising a fresh air combined air handling unit 1, a circulating cooling combined air handling unit 2, and a cooling room 3. The fresh air combined air handling unit 1 filters outside air and sends it into the circulating cooling combined air handling unit 2. The circulating cooling combined air handling unit 2 disinfects the incoming air and sends it out to the cooling room 3. The cooling room 3 is equipped with a mixed flow fan unit 32. The cooling room 3 is used to place cooked feed. The cooling room 3 is connected to an exhaust fan 4 to exhaust the air inside the cooling room 3.

[0038] The fresh air combined air handling unit 1 and the circulating cooling combined air handling unit 2 are connected by an air supply duct 15. The air supply duct 15 is equipped with an air valve 6, which is used to control the opening and closing of the air supply duct 15. The other end of the fresh air combined air handling unit 1 is equipped with an air inlet duct 7, and an air duct type temperature and humidity sensor 8 is connected to the air inlet duct 7. An air duct type temperature and humidity sensor 9 is installed at the end of the air supply duct 15 near the circulating cooling combined air handling unit 2.

[0039] By incorporating damper 6 and two duct-type temperature and humidity sensors, precise control of the fresh air intake path and continuous air quality monitoring are achieved. Damper 6 can flexibly adjust or even shut off the fresh air volume.

[0040] Temperature and humidity sensor 8 monitors the parameters of the untreated raw fresh air in real time, providing initial data for system prediction and adjustment; temperature and humidity sensor 9 monitors the air condition after being treated by the fresh air handling unit. By comparing the data with that of sensor 8, the treatment effect of the fresh air handling unit can be evaluated in real time, and a precise basis for setting the operating parameters of the subsequent circulating cooling unit can be provided. This ensures that the air delivered into the cooling room 3 is always within the optimal range of temperature, humidity and cleanliness, thereby improving the stability of the cooling process and the reliability of feed quality assurance from the source.

[0041] The circulating cooling combined air handling unit 2 is connected to the cooling room 3 through the air supply duct 2 10. The air supply duct 2 10 is equipped with the air supply static pressure sensor 11, and the air supply duct 2 10 is equipped with the duct-type temperature and humidity sensor 3 12 at the end of the air supply duct 2 10 near the cooling room 3.

[0042] By installing a static pressure sensor 11 and a duct-type temperature and humidity sensor 32 at the air supply duct 2 10, the stability of system operation and the level of control precision are significantly improved.

[0043] The air supply static pressure sensor 11 can monitor the air supply power status to the cooling room 3 in real time. Its data can be used to adjust the frequency of the fan section 29 in the circulating cooling unit to ensure that the air supply pressure is stable at the set value. This avoids insufficient or fluctuating air supply due to changes in pipe resistance or dust accumulation in the filter, thereby ensuring uniform airflow organization and consistent feed cooling rate in the cooling room 3.

[0044] The duct-type temperature and humidity sensor 312 directly detects the final state of the air about to enter the cooling room 3. This is the final verification of the effect of the air after being processed by the circulating cooling unit. It ensures that the air parameters sent into the cooling room 3 strictly meet the process requirements, providing the most direct guarantee for the rapid and safe cooling of feed.

[0045] Cooling room 3 and exhaust fan 4 are connected by air supply duct 3 13. Air supply duct 3 13 is equipped with air valve 2 14. Air supply static pressure sensor 2 15 is installed at the end of air supply duct 3 near cooling room 3. Air valve 2 14 is used to control the opening and closing of air supply duct 3 13. Exhaust fan 4 is equipped with exhaust duct 16. Exhaust duct 16 exhausts air to the outside. Air duct type temperature and humidity sensor 4 17 is installed at exhaust duct 16. Fan section differential pressure switch 18 is connected between air supply duct 3 13 and exhaust duct 16. Air supply duct 2 10 is connected to the top of cooling room 3, and air supply duct 3 13 is connected to the corresponding bottom of cooling room 3.

[0046] By setting up a static pressure sensor 215 for the supply air and a duct-type temperature and humidity sensor 417, intelligent monitoring and regulation of the air pressure and exhaust status of the cooling room 3 are realized, effectively ensuring the system's hygiene, safety, and energy-saving operation.

[0047] Air valve 14 can control and adjust the exhaust volume or even completely close the exhaust path. Supply air static pressure sensor 15 monitors the exhaust side pressure of cooling room 3. Working in conjunction with supply air static pressure sensor 11, it can precisely control the room's pressure difference, creating a reasonable directional airflow and protecting the cooling environment. Fan section differential pressure switch 18 directly monitors the operating load status of exhaust fan 4, providing timely warnings of fan failure or blockage in exhaust duct 16. Duct-type temperature and humidity sensor 17 monitors the parameters of the final exhaust gas, which can be used to evaluate the system's heat and moisture exchange efficiency and serve as an auxiliary basis for determining whether the feed cooling process is complete. It also ensures that the exhaust meets environmental protection requirements, forming a complete, controllable, and monitorable exhaust closed loop.

[0048] By employing an upward-flowing and downward-returning airflow system, this system cleverly utilizes the physical principle that hot air naturally rises and cold air naturally sinks. Cooled, dry air is introduced from the top of the room, slowly descending to fully cover the surface of the feed pile and gradually permeating it. The hot, humid air generated during the feed cooling process, due to its lower density, naturally rises and is ultimately effectively drawn away through the exhaust vents at the bottom of the room. This model not only achieves three-dimensional cooling of the entire space from top to bottom but also directly removes the hottest and most humid air through bottom exhaust, effectively inhibiting the accumulation and recirculation of hot and humid air above the feed, significantly improving the overall efficiency of cooling and dehumidification. Simultaneously, it helps maintain relatively lower humidity in the upper area of ​​the feed pile, further inhibiting microbial activity on the feed surface and enhancing the system's reliability and cooling effect.

[0049] Air supply duct 3 13 is connected to air supply duct 2 10 via connecting pipe 19. Connecting pipe 19 is equipped with air valve 3 20, which is used to control the opening and closing of connecting pipe 19.

[0050] By adding a connecting pipe 19 with a third air valve 20, a flexible air recirculation operation mode is introduced into the system. When cooling the cooked feed, valve 20 is closed, and valves 6 and 14 are opened, allowing outside air to be filtered and purified by the fresh air combined air handling unit 1, and then sent to the circulating cooling combined air handling unit 2 for cooling and disinfection, before being sent into the cooling room 3 to cool the feed located in the cooling room 3. The air in the cooling room 3 is discharged to the outside through the exhaust fan 4, achieving rapid cooling of the feed. When the temperature and humidity in the cooling room 3 reach the preset standard, that is, when the feed temperature drops to the preset standard, valves 6 and 14 are closed, and valve 20 is opened, allowing the circulating cooling combined air handling unit 2 to circulate and disinfect the cooling room 3, ensuring the hygiene and safety of the feed.

[0051] The fresh air combined air handling unit 1 includes a primary filter section 21, a medium-efficiency filter section 22, a fan section 23, a high-efficiency filter section 24, and an air outlet section 25 arranged sequentially. The primary filter section 21 is used to perform preliminary filtration on the air entering the fresh air combined air handling unit 1. The medium-efficiency filter section 22 performs secondary filtration. The fan section 23 controls the outside air to enter the fresh air combined air handling unit 1 and then deliver it to the circulating cooling combined air handling unit 2. The high-efficiency filter section 24 is used to perform high-efficiency filtration on the air. The air outlet section 25 is used to deliver the purified air in the fresh air combined air handling unit 1 to the circulating cooling combined air handling unit 2.

[0052] The fresh air combined air handling unit 1 adopts a multi-stage progressive filtration structure, which forms a deep purification barrier for the air entering the fresh air combined air handling unit 1.

[0053] The primary filter stage 21 first intercepts large particulate matter in the atmosphere, such as dust, to protect the subsequent secondary filter stage 22 and extend its lifespan; the secondary filter stage 22 further removes smaller particulate matter; finally, the high-efficiency filter stage 24 performs fine filtration, which can effectively capture fine particles and even some bacteria.

[0054] This three-stage filtration system ensures that the air supplied to the subsequent circulating cooling combined air handling unit 2 has extremely high cleanliness, fundamentally reducing the risk of dust and other pollutants entering the cooling room 3 and contaminating the feed. At the same time, it greatly protects the surface cooler fins and disinfection section 28 components inside the circulating cooling combined air handling unit 2, preventing dust accumulation, bacterial growth, or impact on heat exchange and disinfection efficiency. This reduces equipment maintenance frequency and energy consumption, laying a solid air source foundation for the production of high-quality hygienic feed.

[0055] The circulating cooling combined air handling unit 2 includes a mixing section 26, a surface cooling section 27, a disinfection section 28, a second fan section 29, and a second air outlet section 30 arranged sequentially. The mixing section 26 is used to mix the air entering the circulating cooling combined air handling unit 2. The surface cooling section 27 is used to cool the mixed air. The disinfection section 28 is used to disinfect the cooled air. The second fan section 29 controls the air to be delivered from the mixing section 26 to the second air outlet section 30. The second air outlet section 30 delivers the air in the circulating cooling combined air handling unit 2 to the cooling room 3. A second fan section differential pressure switch 31 is connected between the disinfection section 28 and the second air outlet section 30.

[0056] The mixing section 26 ensures uniform mixing of fresh air and potential return air, guaranteeing consistent air temperature and humidity and improving the heat exchange efficiency of the subsequent cooling section 27. The cooling section 27 is responsible for the core cooling and dehumidification functions, rapidly reducing air temperature to provide powerful cooling. The disinfection section 28, located after the cooling section 27, thoroughly sterilizes the cooled air, preventing secondary contamination during cooling and ensuring that the air supplied to the cooling room 3 is low-temperature and sterile—crucial for inhibiting microbial growth on feed surfaces. The differential pressure switch 31 in the fan section specifically monitors pressure changes before and after the disinfection section 28, sensitively reflecting the clogging of the filter components in the disinfection section 28 or changes in the resistance of the disinfection device itself to airflow. This provides timely maintenance reminders, ensuring stable disinfection effects and system airflow, and is a key safety design feature guaranteeing the continuous effectiveness of the disinfection process.

[0057] The cooling room 3 has duct-type temperature and humidity sensors 531 evenly distributed on both sides of the wall.

[0058] By evenly distributing multiple duct-type temperature and humidity sensors 31 on both sides of the interior walls of cooling room 3, a multi-point, three-dimensional real-time environmental monitoring network was constructed. These sensors can simultaneously collect air temperature and humidity data at different horizontal positions and vertical heights within cooling room 3, thus comprehensively and accurately reflecting the microenvironment of the entire feed pile. This monitoring network can not only monitor the overall progress of the cooling process in real time, but also accurately locate areas that may experience uneven cooling, localized overheating, or humidity accumulation. The collected multi-point data provides a direct basis for the system to dynamically and precisely adjust airflow and temperature, serving as a key sensing foundation for achieving uniform, efficient, and controllable cooling, effectively avoiding the risk of feed condensation or secondary contamination caused by uncontrolled local environmental parameters.

[0059] The upper and lower side walls of the cooling room 3 are provided with ventilation chambers 34. The ventilation chambers 34 are evenly provided with partition rods 35, which divide the ventilation chambers 34 into several interconnected partition chambers. Each partition chamber is provided with a mixed flow fan unit 32.

[0060] The several interconnected partition cavities formed by the partition rod 35 ensure uniform airflow distribution within the ventilation cavity 34, preventing pressure concentration or airflow short-circuiting. Each partition cavity contains an independently installed mixed-flow fan unit 32, enabling modular, independent, and precise control of the supply or exhaust airflow from both the upper and lower sides. This design allows cooling airflow to penetrate the feed layer from top to bottom, effectively solving the problems of uneven cooling and slow heat dissipation in the center that are common with traditional single-sided air supply, thereby improving cooling efficiency and uniformity.

[0061] Limiting components 36 are provided on the upper and lower side walls of the cooling room 3 corresponding to the mixed flow fan unit 32. The limiting components 36 include a column 37 and a limiting plate 38. The column 37 is fixed to the upper and lower side walls of the cooling room 3 at the four corners of the mixed flow fan unit 32. One end of the limiting plate 38 is rotatably connected to the column 37. The top of the column 37 is provided with a threaded hole 39. A locking screw 40 is screwed into the threaded hole 39 and tightened onto the limiting plate 38. The other end of the limiting plate 38 abuts against the mixed flow fan unit 32.

[0062] The rotating limit plate 38, in conjunction with the locking screw 40, enables convenient clamping and quick release of the mixed-flow fan unit 32, greatly simplifying the installation, disassembly, and maintenance process. The four-corner positioning layout ensures even force distribution on the unit, preventing vibration or displacement during operation. The tightening force of the locking screw 40 is adjustable, ensuring reliable fastening while preventing damage to the fan unit or ventilation cavity 34 structure due to excessive compression; significantly improving the ease of maintenance and long-term operational stability of the equipment.

[0063] The mixed-flow fan unit 32 includes a fan 41, a mounting plate 42, a base plate 43, and a sealing plate 44. One side of the mounting plate 42 has a protrusion forming a mounting cavity 45, in which the fan 41 is located. The other side of the mounting plate 42 has a base plate 43, with ventilation holes 46 evenly distributed. Each of the four corners of the sealing plate 44 corresponding to one side of the mounting plate 42 is fixed with an adjusting screw 47, which passes through the mounting plate 42. Both ends of the adjusting screw 47 are provided with adjusting nuts 48, which are tightened onto both sides of the mounting plate 42. The bottom of the adjusting screw 47 is fixedly connected to a support platform 49, which rests against the ventilation cavity 34. The other side of the sealing plate 44 has a handle 50, and both ends of the sealing plate 44 are provided with positioning blocks 51. The partition rod 35 and the upper and lower side walls of the cooling chamber 3 are provided with positioning grooves 52, which are matched with the positioning blocks 51. The sealing plate 44 has ventilation holes 53 evenly distributed.

[0064] By adjusting the screw 47 and nut, the distance between the fan 41, the sealing plate 44, and the ventilation cavity 34 can be flexibly adjusted, thereby optimizing the airflow outlet angle and ensuring the sealing of the contact surface to prevent air leakage; the matching setting of the positioning block 51 and the positioning groove 52 enables the unit to be quickly and accurately positioned and installed. The design of the ventilation hole 46 and ventilation hole 53 on the base plate 43 and the sealing plate 44 ensures smooth airflow; the handle 50 facilitates operation, and the support platform 49 enhances the stability of the unit within the cavity.

[0065] When cooling the cooked feed, valve 20 is closed, and valves 6 and 14 are opened, allowing outside air to be filtered and purified by the fresh air combined air handling unit 1, and then sent to the circulating cooling combined air handling unit 2 for cooling and disinfection, before being sent into the cooling room 3 to cool the feed located in the cooling room 3. The air in the cooling room 3 is discharged to the outside through the exhaust fan 4, achieving rapid cooling of the feed. When the temperature and humidity in the cooling room 3 reach the preset standard, that is, when the temperature of the feed drops to the preset standard, valves 6 and 14 are closed, and valve 20 is opened, allowing the circulating cooling combined air handling unit 2 to circulate and disinfect the cooling room 3, ensuring the hygiene and safety of the feed.

[0066] This invention places cooked feed into a cooling room 3, then controls the operation of a fresh air combined air handling unit 1 and a circulating cooling combined air handling unit 2. Outside air is filtered and purified by the fresh air combined air handling unit 1, then sent to the circulating cooling combined air handling unit 2 for disinfection and cooling, and then sent into the cooling room 3 to cool the cooked feed. The air in the cooling room 3 is discharged to the outside by an exhaust fan 4, so that the feed in the cooling room 3 is reduced to a predetermined temperature, which greatly improves the feed cooling efficiency, shortens the feed production cycle, and at the same time, the rapid cooling reduces the exposure time of the feed in high temperature and high humidity conditions, significantly inhibits the growth conditions of microorganisms, reduces the risk of feed spoilage or decline in hygiene indicators, and helps to ensure the safety and stability of feed products.

[0067] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A feed ventilation and cooling system, characterized in that: The system includes a fresh air combined air handling unit, a circulating cooling combined air handling unit, and a cooling room. The fresh air combined air handling unit filters outside air and then sends it into the circulating cooling combined air handling unit. The circulating cooling combined air handling unit disinfects the incoming air and then sends it out to the cooling room. The cooling room is equipped with a mixed-flow fan unit and is used to place cooked feed. The cooling room is connected to an exhaust fan to exhaust the air inside the cooling room.

2. The feed ventilation and cooling system according to claim 1, characterized in that: The fresh air combined air handling unit and the circulating cooling combined air handling unit are connected by an air supply duct. The air supply duct is equipped with an air valve to control the opening and closing of the air supply duct. The other end of the fresh air combined air handling unit is equipped with an air inlet duct. A duct-type temperature and humidity sensor is connected to the air inlet duct. A duct-type temperature and humidity sensor is installed at the end of the air supply duct near the circulating cooling combined air handling unit.

3. The feed ventilation and cooling system according to claim 1, characterized in that: The circulating cooling combined air handling unit is connected to the cooling room through an air supply duct 2. An air supply static pressure sensor 1 is installed at the air supply duct 2, and a duct-type temperature and humidity sensor 3 is installed at one end of the air supply duct 2 near the cooling room.

4. A feed ventilation and cooling system according to claim 3, characterized in that: The cooling room and the exhaust fan are connected by an air supply duct three. The air supply duct three is equipped with an air valve two. An air supply static pressure sensor two is installed at one end of the air supply duct near the cooling room. The air valve two is used to control the opening and closing of the air supply duct three. The exhaust fan is equipped with an exhaust duct that discharges air to the outside. A duct-type temperature and humidity sensor four is installed at the exhaust duct. A fan section differential pressure switch one is connected between the air supply duct three and the exhaust duct. The air supply duct two is connected to the top of the cooling room, and the air supply duct three is connected to the corresponding bottom of the cooling room.

5. A feed ventilation and cooling system according to claim 4, characterized in that: The third air supply duct is connected to the second air supply duct via a connecting pipe. The connecting pipe is equipped with a third air valve, which is used to control the opening and closing of the connecting pipe.

6. A feed ventilation and cooling system according to claim 1, characterized in that: The fresh air combined air handling unit includes a primary filter section, a medium-efficiency filter section, a fan section, a high-efficiency filter section, and an air outlet section arranged sequentially. The primary filter section is used to perform preliminary filtration on the air entering the fresh air combined air handling unit. The medium-efficiency filter section performs secondary filtration. The fan section controls the flow of outside air into the fresh air combined air handling unit and then delivers it to the circulating cooling combined air handling unit. The high-efficiency filter section is used to perform high-efficiency filtration on the air. The air outlet section is used to deliver the purified air from the fresh air combined air handling unit to the circulating cooling combined air handling unit.

7. A feed ventilation and cooling system according to claim 1, characterized in that: The circulating cooling combined air handling unit includes a mixing section, a surface cooling section, a disinfection section, a second fan section, and a second air outlet section arranged sequentially. The mixing section is used to mix the air entering the circulating cooling combined air handling unit. The surface cooling section is used to cool the mixed air. The disinfection section is used to disinfect the cooled air. The second fan section controls the air to be delivered from the mixing section to the second air outlet section. The second air outlet section delivers the air in the circulating cooling combined air handling unit to the cooling room. A second fan section differential pressure switch is connected between the disinfection section and the second air outlet section.

8. A feed ventilation and cooling system according to claim 1, characterized in that: The cooling room has ventilation chambers on both the upper and lower side walls. Dividing rods are evenly arranged in the ventilation chambers, dividing the ventilation chambers into several interconnected partition chambers. Each partition chamber is equipped with a mixed-flow fan unit.

9. A feed ventilation and cooling system according to claim 1, characterized in that: The upper and lower side walls of the cooling room are equipped with limiting components corresponding to the mixed-flow fan unit. The limiting components include columns and limiting plates. The columns are fixed to the upper and lower side walls of the cooling room at the four corners of the mixed-flow fan unit. One end of the limiting plate is rotatably connected to the column. The top of the column is provided with a threaded hole, and a locking screw is screwed into the threaded hole. The locking screw is tightened onto the limiting plate, and the other end of the limiting plate abuts against the mixed-flow fan unit.

10. A feed ventilation and cooling system according to claim 8, characterized in that: The mixed-flow fan unit includes a fan, a mounting plate, a base plate, and a sealing plate. One side of the mounting plate has a raised section forming a mounting cavity, within which the fan is housed. The other side of the mounting plate has a base plate with evenly distributed ventilation holes. Each of the four corners of the sealing plate corresponding to one side of the mounting plate has an adjusting screw. The adjusting screw passes through the mounting plate, and both ends of the adjusting screw have adjusting nuts, which are tightened onto both sides of the mounting plate. A support platform is fixedly connected to the bottom of the adjusting screw, and the support platform rests against the ventilation cavity. A handle is located on the other side of the sealing plate, and positioning blocks are located at both ends. Positioning grooves are correspondingly provided on the upper and lower side walls of the cooling chamber for the partition rod, and the positioning blocks are matched with the positioning grooves. The sealing plate also has evenly distributed ventilation holes.

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