Material low-temperature precooling system

Abstract

The utility model provides a material low-temperature pre-cooling system which comprises a heat preservation warehouse, a low-temperature pre-cooling bin is arranged in the heat preservation warehouse, a feeding port is formed in the top of the low-temperature pre-cooling bin, a discharging port is formed in the bottom of the low-temperature pre-cooling bin, a feeding door corresponding to the feeding port is arranged on the heat preservation warehouse, an air outlet is formed in the upper portion of the low-temperature pre-cooling bin, and an air inlet is formed in the lower portion of the low-temperature pre-cooling bin. An air cooler is arranged on the top side of an inner cavity of the heat preservation warehouse, the air suction side of the air cooler faces the exhaust outlet, the air outlet side of the air cooler deviates from the exhaust outlet, an air baffle is hung below the air cooler and divides the air suction side and the air outlet side on the two sides, and a circulating air channel is reserved between the bottom edge of the air baffle and the bottom wall of the heat preservation warehouse. An air inlet pipe of the pre-cooling fan penetrates through the circulating air duct to communicate with the air outlet side of the air cooler, and an air outlet pipe of the pre-cooling fan is connected with an air inlet of the low-temperature pre-cooling bin. The cold air can be continuously, uniformly and efficiently distributed in the low-temperature pre-cooling bin through the air cooler, the pre-cooling fan system and the air duct circulation path.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to a refrigeration device, in particular to a material low-temperature precooling system. Background Art

[0002] In the existing technology, there are a series of problems and challenges in the low-temperature pre-cooling process of materials, especially in the food, chemical and pharmaceutical industries, where the pre-cooling efficiency and quality control of materials are particularly critical. Traditional low-temperature pre-cooling systems usually use simple cold storage, and these systems often have the following major problems:

[0003] 1. Inefficiency: In traditional low-temperature pre-cooling systems, the distribution and circulation of cold air is often uneven, resulting in inconsistent cooling effects, which in turn affects the quality of pre-cooling. This inefficient cold air circulation system results in prolonged pre-cooling time and increased energy consumption.

[0004] 2. Low degree of automation: Many traditional pre-cooling systems lack highly automated material handling processes and require manual operation of door opening and closing, material feeding and material removal, etc. This is not only inefficient, but may also affect the pre-cooling effect and material quality due to improper operation.

[0005] 3. Material accumulation and blockage: In the process of material precooling, especially when handling materials in the form of powders and granules, there are often problems of material accumulation and blockage. These problems are mainly caused by unreasonable material discharge design or low efficiency of vibration equipment, which affects the continuity and efficiency of the overall precooling process.

[0006] 4. Inaccurate temperature control: In some older pre-cooling systems, due to technical limitations, the temperature control equipment cannot accurately regulate the temperature of the low-temperature pre-cooling bin, resulting in a gap between the pre-cooling effect and expectations, and cannot adapt to the processing needs of materials that are sensitive to specific temperatures.

[0007] The above problems highlight the need for an efficient, automated material precooling system that can precisely control the low-temperature environment in order to improve precooling efficiency, save energy consumption, and ensure material quality. Utility Model Content

[0008] The utility model aims to solve the above problems in the prior art and proposes a low-temperature precooling system for materials.

[0009] The objective of the utility model can be achieved through the following technical scheme: a material low-temperature precooling system comprises a heat preservation warehouse, a low-temperature precooling warehouse is arranged in the heat preservation warehouse, the top of the low-temperature precooling warehouse is provided with a feeding port, and the bottom is provided with a discharging port, the heat preservation warehouse is provided with a feeding door corresponding to the feeding port, the upper part of the low-temperature precooling warehouse is provided with an exhaust port, and the lower part of the low-temperature precooling warehouse is provided with an air inlet, an air cooler is arranged on the top side of the inner cavity of the heat preservation warehouse, the air suction side of the air cooler faces the exhaust port, and the air outlet side of the air cooler faces away from the exhaust port, a wind shield is suspended below the air cooler, the wind shield separates the air suction side and the air outlet side on both sides, a circulating air duct remains between the bottom edge of the wind shield and the bottom wall of the heat preservation warehouse, a precooling fan is arranged on the bottom of the inner cavity of the heat preservation warehouse, an air inlet pipe of the precooling fan passes through the circulating air duct to be connected with the air outlet side of the air cooler, and the air outlet pipe of the precooling fan is connected to the air inlet of the low-temperature precooling warehouse.

[0010] In the above-mentioned material low-temperature precooling system, the low-temperature precooling warehouse includes an upper rectangular or cylindrical warehouse body, the feeding port is arranged at the center of the top surface of the warehouse body, the feeding valve is arranged in the feeding port, the exhaust port is opened on the upper side wall of the warehouse body, and a filter is arranged in the exhaust port.

[0011] In the above-mentioned material low-temperature precooling system, the bottom of the warehouse body is connected to a collecting hopper with an inclined surface, the upper opening of the collecting hopper is large and the lower opening is small, and a vibrator is arranged on the outer wall of the collecting hopper.

[0012] In the above-mentioned low-temperature precooling system for materials, the bottom of the collecting hopper is connected to the inverted conical discharge port, a discharge valve is arranged in the discharge port, and the discharge port is connected to the conveying equipment.

[0013] In the above-mentioned material low-temperature precooling system, a support frame is arranged around the collecting hopper.

[0014] In the above-mentioned material low-temperature precooling system, the air inlet of the low-temperature precooling bin is opened on the inclined surface of the collecting hopper, and the second filter is arranged on the air inlet.

[0015] In the above-mentioned low-temperature precooling system for materials, a lifter and an adjustment plate are arranged on the bottom edge of the wind shield, the lifter is fixed on the side of the wind shield, the lifter extends a lifting rod downward, and the lifting rod is fixedly connected to the adjustment plate.

[0016] In the above-mentioned low-temperature pre-cooling system for materials, the air cooler is connected to a defrost water pipe, and the defrost water pipe passes through the side wall of the heat preservation store to the outside.

[0017] In the above-mentioned low-temperature precooling system for materials, the outer side of the feeding door of the insulation warehouse is connected to an elevator or a conveyor.

[0018] Compared with the existing technology, this material low temperature precooling system has the following beneficial effects:

[0019] 1. Improve pre-cooling efficiency: Through the designed cooling fan and pre-cooling fan system, as well as the optimized air duct circulation path, ensure that the cold air can be continuously, evenly and efficiently distributed in the low-temperature pre-cooling bin. This design greatly improves the pre-cooling efficiency, allowing the material to reach the required low temperature faster, thereby shortening the pre-cooling time and reducing energy consumption.

[0020] 2. Realize process automation: Use various valves combined with automatic control systems to realize the automation of the entire pre-cooling process, without manual intervention from feeding to discharging. This not only improves operational efficiency, but also reduces the possibility of human operational errors, ensuring the continuity and stability of the pre-cooling process.

[0021] 3. Optimize material handling: By designing an inclined collection hopper and vibrator at the bottom of the silo, the problem of material accumulation and blockage is effectively solved. The use of the vibrator can ensure the smooth passage of materials and avoid blockage at the discharge port, thereby improving the operating efficiency of the overall system.

[0022] 4. Prevent material contamination: By installing filters at the air inlet and outlet, external impurities and microorganisms can be prevented from entering the pre-cooling warehouse to ensure the purity and safety of the materials; at the same time, prevent the leakage of materials from clogging the ventilation pipes.

[0023] 5. Flexible temperature control: By using a single-stage compressor unit, a two-stage compressor unit or a cascade compressor unit, the system can provide a wide temperature range from conventional low temperature to ultra-low temperature. This flexible temperature control makes this system suitable for a variety of temperature-sensitive materials and meets the needs of different industrial applications.

[0024] In general, the system provides an efficient, automated and environmentally friendly low-temperature precooling system for materials, which not only improves the precooling efficiency and operation convenience, but also ensures the high quality of material processing and the economy of the system through precise temperature and process control. These advantages make the invention have important practical and commercial value in modern industrial applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the low-temperature precooling system of this material.

[0026] In the figure, 1. Insulated warehouse; 2. Feeding door; 3. Feeding port; 4. Feeding valve; 5. Warehouse body; 6. Exhaust port; 7. Collecting hopper; 8. Vibrator; 9. Air inlet; 10. Discharging port; 11. Discharging valve; 12. Support frame; 13. Pre-cooling fan; 14. Air inlet duct; 15. Air outlet duct; 16. Air cooler; 17. Wind shield; 18. Adjustment plate; 19. Defrosting water pipe. DETAILED DESCRIPTION

[0027] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0028] like Figure 1 As shown, the low-temperature precooling system for materials includes a heat preservation warehouse 1, a low-temperature precooling warehouse is arranged in the heat preservation warehouse 1, a feeding port 3 is arranged on the top of the low-temperature precooling warehouse, and a discharge port 10 is arranged on the bottom. A feeding door 2 is arranged in correspondence with the feeding port 3 in the heat preservation warehouse 1, and the feeding door 2 can be an electric sliding door or a pneumatic sliding door to realize the function of an automatic heat preservation door. An exhaust port 6 is arranged on the upper part of the low-temperature precooling warehouse, an air inlet 9 is arranged on the lower part of the low-temperature precooling warehouse, and a cold air blower 16 is arranged on the top side of the inner cavity of the heat preservation warehouse 1. The cold source of the cold air blower 16 can adopt single-stage or double-stage compression to realize conventional low-temperature precooling, and a cascade compressor unit can also be adopted to realize ultra-low temperature precooling. The air suction side of the air cooler 16 faces the air outlet 6, and the air outlet side of the air cooler 16 faces away from the air outlet 6. A wind shield 17 is suspended below the air cooler 16, and the wind shield 17 separates the air suction side and the air outlet side on both sides. A circulating air duct remains between the bottom edge of the wind shield 17 and the bottom wall of the thermal insulation warehouse 1. A precooling fan 13 is arranged at the bottom of the inner cavity of the thermal insulation warehouse 1. The precooling fan 13 specifically adopts a high-pressure head fan such as a centrifugal fan. The air inlet pipe 14 of the precooling fan 13 passes through the circulating air duct to connect to the air outlet side of the air cooler 16, and the air outlet pipe 15 of the precooling fan 13 is connected to the air inlet 9 of the low-temperature precooling warehouse.

[0029] The low-temperature precooling warehouse includes a rectangular or cylindrical warehouse body 5 at the top, a feeding port 3 is arranged at the center of the top surface of the warehouse body 5, and a feeding valve 4 is arranged in the feeding port 3. The feeding valve 4 is specifically an electric butterfly valve, which is used to open and close the feeding port 3. An exhaust port 6 is opened on the upper side wall of the warehouse body 5, and a filter 1 is arranged in the exhaust port 6 to block the material through the filter 1 to prevent the material from entering the insulation warehouse 1.

[0030] The bottom of the bin body 5 is connected to a collecting hopper 7 with an inclined surface. The upper opening of the collecting hopper 7 is large and the lower opening is small. A vibrator 8 is arranged on the outer wall of the collecting hopper 7. The inclined surface has a taper that inclines from top to bottom, thereby providing a guiding slope for the downward collection of materials. At the same time, the vibrator 8 is used to generate a vibration frequency, which is conducive to the downward transportation of materials and prevents material accumulation and blockage.

[0031] The bottom of the collecting hopper 7 is connected to an inverted conical discharge port 10, in which a discharge valve 11 is arranged, and the discharge port 10 is connected to a conveying device. The discharge valve 11 controls the opening and closing of the discharge port 10, and the discharge port 10 releases the material to the conveying device for further transportation.

[0032] A support frame 12 is arranged around the collecting hopper 7. The support frame 12 is used to install and fix the entire low-temperature pre-cooling bin.

[0033] The air inlet 9 of the low-temperature precooling bin is opened on the inclined surface of the collecting hopper 7, and a second filter is arranged on the air inlet 9. The air inlet 9 is opened on the inclined surface so that the air inlet angle forms a certain angle with the material, which is beneficial to improve the contact degree between the cold air and the material and accelerate the precooling effect. The second filter is arranged on the air inlet 9 to prevent the material from entering the air outlet pipe 15 of the precooling fan 13.

[0034] A lifter and an adjustment plate 18 are provided on the bottom edge of the wind shield 17. The lifter is fixedly mounted on the side of the wind shield 17. The lifter extends a lift rod downward, and the lift rod is fixedly connected to the adjustment plate 18. When the lifter is started to extend and retract the lift rod, the adjustment plate 18 is synchronously driven to rise and fall, so as to control the length of the adjustment plate 18 extending from the bottom edge of the wind shield 17, so as to adjust the ventilation area of ​​the circulating air duct, that is, to control the size of the circulating air volume.

[0035] The air cooler 16 is connected to the defrosting water pipe 19, and the defrosting water pipe 19 passes through the side wall of the heat preservation storehouse 1 to the outside. When the air cooler 16 defrosts, the defrosting water generated is discharged to the outside of the heat preservation storehouse 1 through the defrosting water pipe 19.

[0036] The operation process of this material low temperature precooling system is as follows:

[0037] 1. Material entering the warehouse: The cooling fan 16 and the pre-cooling fan 13 are in the shutdown state, the feeding door 2 is opened, the feeding valve 4 is opened, and the discharge valve 11 is closed. The material can be transported to the feeding door 2 by a conveying device such as an elevator and a conveyor, and then the material enters the low-temperature pre-cooling warehouse through the feeding port 3 and the feeding valve 4. After the feeding is completed, the feeding valve 4 is closed and the feeding door 2 is closed.

[0038] 2. Precooling: First, turn on the air cooler 16 (refrigeration system is turned on), and turn on the precooling fan 13 after the temperature in the insulation warehouse 1 drops to the set temperature. The precooling fan 13 inhales cold air from the outlet side of the air cooler 16, and after being pressurized by the precooling fan 13, it is blown into the inner cavity through the air inlet 9 at the bottom of the low-temperature precooling warehouse. The cold air fully exchanges heat with the materials in the low-temperature precooling warehouse to achieve material cooling. The heated cold air is discharged to the insulation warehouse 1 through the exhaust port 6 of the low-temperature precooling warehouse, and then is inhaled from the air suction side by the air cooler 16, and is discharged to the air outlet side after cooling to enter the next cycle. During the refrigeration process, the air cooler 16 needs to defrost, and the defrost water is discharged to the outside of the insulation warehouse 1 through the defrost water pipe 19.

[0039] 3. Material discharge: After precooling, the precooling fan 13 is turned off, the conveying equipment connected to the bottom of the discharge port 10 is turned on, and then the discharge valve 11 is opened to start discharging. At this time, the cooling fan 16 is turned on until the discharge is completed to prevent condensation on the surface of the low-temperature precooling bin during the discharge process.

[0040] The entire process of material entry, temperature pre-cooling, and material exit can be automated through PLC programming and other means.

[0041] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A material low-temperature precooling system, comprising a heat preservation warehouse, a low-temperature precooling bin is arranged in the heat preservation warehouse, the top of the low-temperature precooling bin has a feeding port, the bottom has a discharge port, the heat preservation warehouse is provided with a feeding door corresponding to the feeding port, the upper part of the low-temperature precooling bin is provided with an exhaust port, and the lower part of the low-temperature precooling bin is provided with an air inlet, characterized in that: An air cooler is arranged on the top side of the inner cavity of the heat preservation storage, with the air suction side of the air cooler facing the exhaust port, and the air outlet side of the air cooler away from the exhaust port. A wind shield is suspended under the air cooler, and the wind shield separates the air suction side and the air outlet side on both sides. A circulating air duct remains between the bottom edge of the wind shield and the bottom wall of the heat preservation storage, and a precooling fan is arranged on the bottom of the inner cavity of the heat preservation storage, and the air inlet pipe of the precooling fan passes through the circulating air duct to be connected to the air outlet side of the air cooler, and the air outlet pipe of the precooling fan is connected to the air inlet of the low-temperature precooling bin.

2. The material low temperature precooling system according to claim 1, characterized in that: The low-temperature precooling warehouse includes an upper rectangular or cylindrical warehouse body, the feeding port is arranged at the center of the top surface of the warehouse body, a feeding valve is arranged in the feeding port, the exhaust port is opened on the upper side wall of the warehouse body, and a filter is arranged in the exhaust port.

3. The material low temperature precooling system according to claim 2, characterized in that: The bottom of the bin body is connected to a collecting hopper with an inclined surface. The upper opening of the collecting hopper is large and the lower opening is small. A vibrator is arranged on the outer wall of the collecting hopper.

4. The material low temperature precooling system according to claim 3, characterized in that: The bottom of the collecting hopper is connected to the inverted conical discharge port, a discharge valve is arranged in the discharge port, and the discharge port is connected to the conveying equipment.

5. The material low temperature precooling system according to claim 4, characterized in that: A support frame is arranged on the peripheral side of the collecting hopper.

6. The material low temperature precooling system according to claim 3, characterized in that: The air inlet of the low-temperature pre-cooling bin is opened on the inclined surface of the collecting hopper, and a second filter is arranged on the air inlet.

7. The material low temperature precooling system according to claim 1, characterized in that: A lifter and an adjusting plate are arranged on the bottom edge of the windshield. The lifter is fixedly mounted on the side of the windshield. A lifting rod extends downward from the lifter, and the adjusting plate is fixedly connected to the lifting rod.

8. The material low temperature precooling system according to claim 1, characterized in that: The cold air fan is connected to a defrost water pipe, and the defrost water pipe passes through a side wall of the heat preservation store to the outside.

9. The material low temperature precooling system according to claim 1, characterized in that: The outer side of the feeding door of the heat preservation warehouse is connected to an elevator or a conveyor.

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