A packaging system for a hygroscopic, powdery product

Abstract

The utility model relates to product packaging system technical field, specifically disclose a kind of packaging system for easy hygroscopic powdery product;Including packing room;Packing room outside is equipped with with packing room inside intercommunication dehumidifier unit, and for the air in packing room is carried out sustained dehumidification, make packing room inside maintain in preset low humidity environment;Dehumidifier unit includes dehumidifier and the refrigerating machine connected by pipeline;Refrigerating machine provides cold source to dehumidifier by freezing liquid inlet pipe, dehumidifier extracts the wet air in packing room by air suction pipeline, and after water is separated by the cooling radiator in dehumidifier, dry air and fresh air are mixed again and are sent back packing room by exhaust duct, simultaneously, part of wet air is discharged by regeneration air duct, to maintain the dry and fresh air in packing room, can effectively avoid the problem of powder dust, finally ensure that easy hygroscopic powdery product can be in stable dry environment Realize long-period, high-quality packaging operation.

Description

Technical Field

[0001] This utility model relates to the field of product packaging system technology, and in particular to a packaging system for easily absorbing moisture powder products. Background Technology

[0002] In industrial production, hygroscopic powdery products (such as fertilizer-grade ammonium polyphosphate produced by the condensation of urea phosphate, powdered water-soluble fertilizers, anhydrous potassium dihydrogen phosphate, and potassium pyrophosphate) are highly sensitive to environmental humidity due to their loose and porous microstructure and material polarity. Especially in southern my country during the summer, high temperatures and heavy rainfall often result in relative humidity levels exceeding 80%. The large amount of water vapor in the air easily comes into contact with these powdery products, causing problems such as moisture absorption, clumping, and sticking to packaging walls, directly hindering the normal progress of the packaging process.

[0003] In existing packaging technologies, various technical solutions have been developed for moisture-proofing of easily hygroscopic powdery products, with localized dehumidification or equipment-level moisture-proof design being the mainstream. For example, the core design of the packaging device with a drying and dehumidification system, as described in patent publication number CN221986803U, involves installing a fan and heating grid at the top of the dehumidification replacement chamber. The heated air is then transported through a pipe to a drying tube, which extends into the packaging bottle to achieve localized dehumidification. This is combined with structures such as the bottle cavity and temporary storage chamber to complete the packaging process. While this patent improves the humidity environment inside the packaging bottle through targeted drying methods, it has significant technical limitations: First, the dehumidification range is limited to a local space inside the packaging bottle, and the humidity of the entire packaging operation area is not controlled. When humid air from the outside seeps in through personnel operations and material transfer gaps, the powdered product will still absorb moisture and clump during transportation and temporary storage. Second, its drying method relies on air heating. For heat-sensitive and moisture-absorbing powders, the heating process may cause product denaturation, and it is impossible to achieve precise and stable humidity control. Third, it lacks an overall airtight protective design for the packaging area. The continuous intrusion of high-humidity air from the outside will significantly weaken the local dehumidification effect, making it difficult to meet the needs of continuous industrial production.

[0004] In actual production, packaging systems using this type of existing technology often face multiple challenges: Powdered products absorb moisture and clump during transport to the packaging bottles due to exposure to an uncontrolled humidity environment, leading to frequent blockages in components such as the screw conveyor and discharge pipe. This necessitates hourly shutdowns for cleaning, with each cleaning session taking 20-30 minutes, severely impacting production continuity. Simultaneously, the alternating wet and dry environments created by localized dehumidification can cause uneven moisture content in the powder, resulting in product quality fluctuations. Furthermore, dust generated during packaging absorbs moisture and adheres to the inner walls of the equipment, further exacerbating the risk of blockages and creating a vicious cycle of dust, moisture absorption, blockages, and shutdowns. For mass production scenarios, existing technologies cannot achieve the goals of long-cycle, low-maintenance, and high-quality packaging, becoming a key bottleneck restricting the industrial production of easily hygroscopic powdered products. Utility Model Content

[0005] In view of this, the present utility model provides a packaging system for easily hygroscopic powder products, which solves the technical problem that existing packaging systems cannot effectively prevent easily hygroscopic powder products from contacting humid air in high humidity environments, resulting in powder easily absorbing moisture and clumping, blocking packaging channels, requiring frequent shutdowns for cleaning and drying, and failing to achieve long-term stable packaging.

[0006] This utility model provides a packaging system for easily absorbing moisture powder products, including a packaging room; a dehumidifier unit is provided outside the packaging room and communicates with the inside of the packaging room, and is used to continuously dehumidify the air inside the packaging room, so that the inside of the packaging room is maintained in a preset low humidity environment;

[0007] The dehumidification unit includes a dehumidifier and a refrigeration unit connected by pipes;

[0008] The refrigeration unit provides a cold source to the dehumidifier through a refrigerant inlet pipe. The dehumidifier draws humid air from the packaging room through an air intake pipe, and after being cooled and dehydrated by the surface cooler inside the dehumidifier, the dry air is mixed with fresh air and sent back to the packaging room through an exhaust pipe. At the same time, some humid air is discharged through a regeneration air pipe to maintain the dryness and freshness of the air in the packaging room.

[0009] Preferably, the dehumidifier unit is connected to the packaging room through a first connecting path, a second connecting path, and a third connecting path;

[0010] The first connecting path is set as an air intake path, the second connecting path is set as a fresh air path, and the third connecting path is set as a regenerated air path.

[0011] Preferably, the first connecting path is provided with a first surface cooler, a second surface cooler and a third surface cooler;

[0012] The dehumidifier is located between the second surface cooler and the third surface cooler, and an exhaust duct is provided between the dehumidifier and the third surface cooler. The third surface cooler is connected to the packaging room through the duct.

[0013] The first surface cooler and the second surface cooler are connected by a pipe, and the first surface cooler is connected to the outside through a fresh air duct.

[0014] Preferably, the second connection path is connected to the packaging room and then to the second surface cooler via the air suction pipe.

[0015] Preferably, the third connection path connects the packaging room to the dehumidifier via an exhaust duct, and the dehumidifier connects to the outside.

[0016] Preferably, the refrigeration unit further includes a refrigerant outlet pipe. The refrigeration unit is connected to the dehumidifier through a refrigerant inlet pipe and a refrigerant outlet pipe, and forms a refrigerant circulation loop with the dehumidifier through the refrigerant inlet pipe and the refrigerant outlet pipe, and provides a cold source for the first surface cooler, the second surface cooler and the third surface cooler in the dehumidifier, so as to achieve cooling and dehumidification of the air in the packaging room.

[0017] Preferably, the packaging room is also equipped with a feeder and a discharge machine;

[0018] The feed inlet of the feeder is connected to the packaging hopper of the discharge machine;

[0019] The discharge machine is a screw discharge machine.

[0020] Preferably, the packaging room is further provided with an isolation room, which includes a buffer room, a first door, a second door, and an air curtain.

[0021] The first door and the second door are respectively located on both sides of the buffer room, and the air curtain machine is located on top of the first door;

[0022] When the first door is opened, the air curtain machine starts to form an air barrier from top to bottom, preventing outside humid air from entering the buffer room.

[0023] After the first door is closed, the dehumidification equipment in the buffer room is activated to reduce the humidity inside the buffer room. Once the humidity in the buffer room reaches the set range, the second door is opened to enter the packaging room.

[0024] The packaging system for easily absorbing moisture powder products provided by this utility model has the following beneficial effects:

[0025] In this invention, an isolation room consisting of a buffer zone, a first door, a second door, and an air curtain effectively prevents humid air from entering the packaging room. The buffer zone also regulates humidity, further reducing the interference of humid air on the packaging environment. The dehumidifier unit, through the cooperation of a refrigeration unit, a dehumidifier, and various pipes, forms a refrigerant circulation loop to cool the surface cooler. It continuously extracts humid air from the packaging room for cooling and water removal, then returns dry air mixed with fresh air to the packaging room, maintaining dryness and freshness. The feeder, packaging silo, and variable frequency screw conveyor within the packaging room work together to achieve stable conveying of powdered products and precise control of the feeding amount through a weighing system, achieving quantitative packaging while effectively avoiding powder dust problems. Ultimately, this ensures that easily hygroscopic powdered products can achieve long-term, high-quality packaging operations in a stable and dry environment. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0027] Figure 1 This is a diagram of a packaging system for moisture-absorbing powder products.

[0028] Parts and their numbers in the diagram:

[0029] 1-First door, 2-Air curtain machine, 3-Buffer room, 4-Second door, 5-Packaging room, 6-Inlet, 7-Feeder, 8-Outlet, 9-Packaging silo, 10-Screw discharge machine, 11-Refrigeration unit, 12-Refrigeration inlet pipe, 13-Refrigeration outlet pipe, 14-Suction duct, 15-Exhaust duct, 16-Fresh air duct, 17-First surface cooler, 18-Second surface cooler, 19-Dehumidifier, 20-Third surface cooler, 21-Regenerated air duct, 22-Dehumidifier unit. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention.

[0031] Example 1

[0032] Please see Figure 1 This utility model provides a packaging system for moisture-absorbing powder products. In the field of industrial production, moisture-absorbing powder products are highly sensitive to environmental humidity due to their loose and porous microstructure and material polarity.

[0033] Especially during hot and rainy seasons or in high-humidity areas, the relative humidity of the environment is often maintained at a high level. The large amount of water vapor in the air can easily come into contact with these powdery products, leading to problems such as moisture absorption, clumping, and sticking to the walls during the packaging process. Clumped powder can clog key components such as the packaging hopper outlet and the feeding channel, while powder sticking to the walls will cause material waste and increase the burden of equipment cleaning. Existing conventional packaging systems mostly rely on basic sealed designs or simple negative pressure structures, which can only achieve local protection for packaging equipment and cannot actively control the air humidity of the entire packaging room. At the same time, the gravity feeding method used in some systems can easily cause powder dust. After the dust absorbs moisture, it further aggravates the equipment blockage, causing frequent interruptions in the packaging process. Manual shutdown, cleaning, and drying are required before restarting. This not only seriously affects packaging efficiency but also makes it difficult to meet the long-cycle and stable packaging requirements of the industrial production of hygroscopic powdery products, becoming a major bottleneck restricting the production and circulation of such products.

[0034] Please see Figure 1 This embodiment provides a packaging system for easily hygroscopic powder products. The packaging system includes a packaging room 5. A dehumidifier unit 22 is provided outside the packaging room 5 and communicates with the inside of the packaging room 5. It is used to continuously dehumidify the air inside the packaging room 5, so that the inside of the packaging room 5 is maintained in a preset low humidity environment. The dehumidifier unit 22 includes a dehumidifier 19 and a refrigeration unit 11 connected by a pipe. The refrigeration unit 11 provides a cold source to the dehumidifier 19 through a refrigerant inlet pipe 12. The dehumidifier 19 draws humid air from the packaging room 5 through an air intake pipe 14. After being cooled and dehydrated by the surface cooler inside the dehumidifier 19, the dry air is mixed with fresh air and sent back to the packaging room 5 through an exhaust pipe 15. At the same time, some humid air is discharged through a regeneration air pipe 21 to maintain the dryness and freshness of the air inside the packaging room 5.

[0035] During dehumidification, firstly, in the cold source supply stage, the refrigeration unit 11 delivers low-temperature coolant to the surface cooler inside the dehumidifier 19 through the refrigerant inlet pipe 12, providing continuous cooling capacity for subsequent humid air cooling and water separation, ensuring that the surface cooler maintains a stable low-temperature state. Next, in the humid air extraction stage, the dehumidifier 19 actively extracts high-humidity air from the packaging room 5 through the suction duct 14, directing the humid air from the packaging room 5 into the dehumidifier 19. Subsequently, in the cooling and water separation stage, when the humid air entering the dehumidifier 19 flows through the low-temperature surface cooler, the water vapor in the air condenses into liquid water upon contact with the condenser, achieving the cooling and water separation process. Moisture separation completes air dehumidification; then, in the dry air return cycle, the cooled and dehydrated dry air is fully mixed with the fresh air introduced from the outside, ensuring air freshness and avoiding the air quality degradation caused by a single cycle. The mixed dry air is then sent back to the packaging room 5 through the exhaust duct 15 to replenish the dry air in the packaging room 5; finally, in the humid air exhaust cycle, the air with high moisture content separated during the dehumidification process is discharged to the outside through the regenerated air duct 21, avoiding the circulation of humid air in the system and ensuring the continuous and efficient operation of the dehumidifier unit 22, forming a continuous dehumidification cycle for the air in the packaging room 5.

[0036] The dehumidifier unit 22 provides a stable and suitable environment for packaging hygroscopic powder products. It maintains the packaging room 5 in a preset low-humidity environment, reducing the contact between hygroscopic powder products and humid air at the source. This effectively prevents products from clumping or sticking to the walls due to moisture absorption, ensuring the stability of the product's shape during the packaging process, reducing packaging channel blockage caused by product clumping, and ensuring a smooth packaging process. Furthermore, the dry air mixed with fresh air is returned to the packaging room 5, maintaining the freshness of the air inside the packaging room 5, improving the packaging working environment, and preventing equipment damage caused by long-term retention of humid air. This extends the service life of the packaging equipment and provides strong support for the long-term and stable packaging of hygroscopic powder products.

[0037] Furthermore, the dehumidifier unit 22 is connected to the packaging room 5 through a first connecting path, a second connecting path, and a third connecting path; wherein, the first connecting path is set as an air intake path, the second connecting path is set as a fresh air path, and the third connecting path is set as a regenerated air path.

[0038] Furthermore, a first surface cooler 17, a second surface cooler 18, and a third surface cooler 20 are provided on the first connecting path; the dehumidifier 19 is disposed between the second surface cooler 18 and the third surface cooler 20, and an exhaust duct 15 is provided between the dehumidifier 19 and the third surface cooler 20; the third surface cooler 20 is connected to the packaging room 5 through the duct; the first surface cooler 17 and the second surface cooler 18 are connected through the duct, and the first surface cooler 17 is connected to the outside through the fresh air duct 16.

[0039] Furthermore, the second connection path is connected to the packaging room 5 and to the second surface cooler 18 via the air suction pipe 14.

[0040] Furthermore, the third connection path connects the packaging room 5 to the dehumidifier 19 through the exhaust duct 15, and the dehumidifier 19 connects to the outside.

[0041] Specifically, the first connection path has the core process of introducing external fresh air, multi-stage cooling and dehumidification, and delivering dry air to the packaging room 5. The external fresh air first enters the first surface cooler 17 through the fresh air duct 16, where it undergoes preliminary cooling and water separation to remove some moisture. Then, the fresh air enters the second surface cooler 18, which is connected to the first surface cooler 17, for secondary cooling and dehumidification to further reduce the air humidity. The dehumidified air enters the dehumidifier 19 located between the second surface cooler 18 and the third surface cooler 20 to complete deep dehumidification. After that, the dry air enters the third surface cooler 20 through the exhaust duct 15 between the dehumidifier 19 and the third surface cooler 20, where the temperature is finely adjusted to match the ambient temperature of the packaging room 5. Finally, the dry air processed by the third surface cooler 20 is delivered to the packaging room 5 through the duct to replenish the dry air in the packaging room 5.

[0042] The second connecting path is a fresh air path, which focuses on the extraction and directional dehumidification of humid air in the packaging room 5. The humid air in the packaging room 5 is extracted through the air intake pipe 14 and directly delivered to the second surface cooler 18. The humid air entering the second surface cooler 18 merges with the fresh air that has undergone preliminary cooling in the first connecting path and participates in the secondary cooling and dehumidification process. Then, they enter the dehumidifier 19 together for deep dehumidification and are finally converted into dry air through subsequent processes and sent back to the packaging room 5, forming a circulating dehumidification of the air inside the packaging room 5.

[0043] The third connecting path is the regenerated air path, which is responsible for the function of humid air discharge and system humidity balance. The humid air in the packaging room 5 is transported to the dehumidifier 19 through the exhaust duct 15. After the dehumidifier 19 separates the high humidity water vapor, it forms regenerated air with extremely high moisture content. This regenerated air no longer participates in the circulation, but is directly discharged to the external environment by the dehumidifier 19, avoiding the retention of high humidity air in the system, ensuring the stability of the internal humidity of the dehumidifier unit 22, and maintaining continuous dehumidification capacity.

[0044] Specifically, the multi-stage surface cooler design (first surface cooler 17, second surface cooler 18, and third surface cooler 20) in the first connecting path achieves gradual cooling and layer-by-layer dehumidification of the fresh air. Compared with single-stage dehumidification, it can more thoroughly remove moisture from the air, ensuring that the humidity of the air delivered to the packaging room 5 meets the standards. The second connecting path directs the humid air in the packaging room 5 into the dehumidification process, preventing the humid air from accumulating in the packaging room 5. This, together with the first path, forms a coordinated dehumidification arrangement of internal and external air, further improving the overall dehumidification efficiency. The three paths working together can accurately maintain the humidity of the packaging room 5 within a preset low humidity range, preventing humidity fluctuations from causing the powder to absorb moisture.

[0045] The first connecting path introduces fresh air from the outside, breaking the limitations of a single internal air circulation and continuously replenishing fresh air to the packaging room 5, avoiding air pollution caused by long-term closure and improving the working environment; at the same time, the third surface cooler 20 finely adjusts the temperature of the dry air, so that the temperature of the air sent into the packaging room 5 is consistent with the environment of the packaging room 5, preventing condensation caused by temperature difference, avoiding powder from absorbing moisture due to condensation, and ensuring a stable packaging environment.

[0046] The third connection path directly discharges the high-humidity regenerated air separated within the system to the outside, preventing the high-humidity air from condensing and adhering inside the unit. This prevents corrosion or efficiency reduction in components such as the surface coolers (first surface cooler 17, second surface cooler 18, and third surface cooler 20) and dehumidifier 19 due to moisture accumulation, thus extending the service life of the equipment. At the same time, the three paths have clear division of labor and smooth process connection, forming a complete closed loop of fresh air introduction, humid air treatment, and waste humid air discharge. This ensures that the dehumidifier unit 22 does not require frequent shutdowns for maintenance, providing support for the long-term stable packaging of easily hygroscopic powdery products.

[0047] Furthermore, the refrigeration unit 11 also includes a refrigerant outlet pipe 13. The refrigeration unit 11 is connected to the dehumidifier 19 through the refrigerant inlet pipe 12 and the refrigerant outlet pipe 13, and forms a refrigerant circulation loop with the dehumidifier 19 through the refrigerant inlet pipe 12 and the refrigerant outlet pipe 13, and provides a cold source for the first surface cooler 17, the second surface cooler 18 and the third surface cooler 20 in the dehumidifier 19, so as to achieve cooling and dehumidification of the air in the packaging room 5.

[0048] The refrigerant circulation loop is the core of the energy supply for the dehumidifier unit 22 to achieve continuous cooling and dehumidification. First, it can continuously provide a stable cold source for the first surface cooler 17, the second surface cooler 18, and the third surface cooler 20 in the dehumidifier 19, ensuring that the three surface coolers can maintain a low temperature and meet the temperature requirements for air cooling and water separation (dehumidification). Secondly, through the circulation of the refrigerant, it can achieve efficient transfer of cold energy between the refrigeration unit 11 and the surface coolers (first surface cooler 17, second surface cooler 18, and third surface cooler 20), avoid cold energy loss, and ensure that the dehumidifier unit 22 has a stable and lasting cooling and dehumidification effect on the air in the packaging room 5, providing key support for creating a low-humidity environment for packaging easily hygroscopic powdery products.

[0049] The refrigerant circulation loop operates in a closed-loop process, consisting of refrigerant generation by the chiller 11, refrigerant delivery, refrigerant release by the surface coolers (first surface cooler 17, second surface cooler 18, and third surface cooler 20), and refrigerant return. After the chiller 11 starts, it generates low-temperature cooling capacity through its own refrigeration system and transfers the cooling capacity to the refrigerant inside the unit, causing the refrigerant temperature to drop to the set low-temperature value. Subsequently, driven by the power of the chiller 11, the low-temperature refrigerant is directionally transported to the dehumidifier 19 through the refrigerant inlet pipe 12.

[0050] After entering the dehumidifier 19 through the refrigerant inlet pipe 12, the low-temperature refrigerant flows through the internal heat exchange channels of the first surface cooler 17, the second surface cooler 18, and the third surface cooler 20 respectively. When air flows over the surface of these surface coolers, the surface coolers transfer the cold energy of the refrigerant to the air, causing the air temperature to drop rapidly below the dew point. The water vapor in the air condenses into liquid water, while the refrigerant temperature rises due to the release of cold energy.

[0051] After releasing cold energy, the refrigerant, whose temperature rises, flows back from the dehumidifier 19 to the refrigeration unit 11 through the refrigerant outlet pipe 13. The high-temperature refrigerant that returns to the refrigeration unit 11 comes into contact with the refrigeration system again, reabsorbs cold energy, and cools down to a low temperature. Then it enters the next cycle of cold supply, cold release, and return, realizing the reuse of refrigerant and the continuous supply of cold energy. This ensures that the three surface coolers (first surface cooler 17, second surface cooler 18, and third surface cooler 20) always maintain a low temperature, thus ensuring the continuous cooling and dehumidification capacity of the dehumidifier unit 22 for the air in the packaging room 5.

[0052] Furthermore, the packaging room 5 is also equipped with a feeder 7 and a discharge machine; the feed inlet 6 of the feeder 7 is connected to the packaging material bin 9 of the discharge machine; the discharge machine is a screw discharge machine 10.

[0053] The material conveying system consisting of feeder 7 and screw conveyor 10 is a key link in achieving stable and lossless packaging of easily hygroscopic powder products. It avoids excessive contact between powder and air in the packaging room 5 during the transfer process through closed conveying, reducing the risk of moisture absorption. It also prevents powder dust from being generated through structured conveying, avoiding material waste and equipment blockage caused by dust. Furthermore, it can be combined with a subsequent weighing system to achieve quantitative packaging, ensuring that the weight of each bag of product is accurate and consistent, meeting the standardized requirements of industrial production.

[0054] In use, hygroscopic powdery products enter the feeder 7 through the feed inlet 6. The feeder 7 conveys the powder to the adjacent packaging hopper 9 at a stable rate. The packaging hopper 9 acts as a temporary buffer to prevent unstable subsequent discharge due to fluctuations in the front-end supply. Subsequently, the powder temporarily stored in the packaging hopper 9 enters the screw conveyor 10 below under gravity. The screw conveyor 10 drives the screw blades to rotate through a variable frequency motor, using the pushing force of the screw blades to convey the powder evenly and uniformly into the packaging bag. Throughout the process, the sealed structure of the feeder 7 and the screw conveyor 10 isolates the powder from direct contact with the air. At the same time, the variable frequency function of the screw conveyor 10 can adjust the discharge speed according to the packaging requirements. Combined with the weighing system of the packaging machine, the feeding amount is controlled in real time, ultimately achieving stable conveying and quantitative packaging of powdery products.

[0055] Furthermore, the packaging room 5 is also equipped with an isolation room, which includes a buffer room 3, a first door 1, a second door 4, and an air curtain machine 2. The first door 1 and the second door 4 are respectively located on both sides of the buffer room 3, and the air curtain machine 2 is located on top of the first door 1. When the first door 1 is opened, the air curtain machine 2 is activated to form an air barrier from top to bottom, preventing outside humid air from entering the buffer room 3. When the first door 1 is closed, the dehumidification device of the buffer room 3 is activated to reduce the humidity in the buffer room 3. After the humidity in the buffer room 3 reaches the set range, the second door 4 is opened to enter the packaging room 5.

[0056] In this embodiment, the isolation room is a protective barrier for the packaging room 5 against the intrusion of external humid air. Through the dual protection of physical barrier and humidity pretreatment, it minimizes the entry of external humid air into the packaging room 5 when personnel and materials enter and exit. First, it blocks the direct connection between the high humidity outside air and the low humidity inside the packaging room 5, avoiding a sudden increase in humidity in the packaging room 5. Furthermore, through the humidity regulation of the buffer room 3, the air before entering the packaging room 5 is pretreated to ensure that the humidity of the air entering the packaging room 5 meets the requirements. Finally, it ensures the convenience of personnel and materials entering and exiting the packaging room 5, while not compromising the airtightness and low humidity environment of the packaging room 5.

[0057] When personnel or materials need to enter the packaging room 5, the first door 1 is opened first. At the same time, the air curtain machine 2 at the top of the first door 1 is activated, forming a high-speed air barrier from top to bottom. This barrier can prevent outside humid air from entering the buffer room 3 as the door is opened, thus preventing direct intrusion of humid air. After personnel / materials enter the buffer room 3, the first door 1 is closed, and the air curtain machine 2 stops operating. Subsequently, the dehumidification equipment in the buffer room 3 is activated to dehumidify any remaining small amount of humid air in the buffer room 3. The humidity in the buffer room 3 is monitored in real time by a humidity sensor. When the humidity drops to a set range close to the humidity in the packaging room 5, the dehumidification equipment stops operating. Only then can the second door 4 be opened, and personnel / materials can enter the packaging room 5. Conversely, when personnel / materials leave the packaging room 5, the process is reversed. Similarly, the buffer room 3 and the air curtain machine 2 prevent a large amount of low-humidity air from escaping from the packaging room 5 and the intrusion of outside humid air, thus maintaining a stable humidity in the packaging room 5.

[0058] Furthermore, a humidity detection device and a control unit are installed in the buffer room 3; the control unit is electrically connected to the humidity detection device, the air curtain machine 2 and the dehumidification component respectively; when the first door 1 is opened, the control unit controls the air curtain machine 2 to start; when the first door 1 is closed, the control unit controls the start and stop of the dehumidification equipment according to the detection result of the humidity detection device; when the humidity of the buffer room 3 reaches the set range, the control unit issues a prompt signal to allow the second door 4 to be opened.

[0059] After the labeling is completed, if you find any omissions, repetitions, or improper labeling positions for certain component numbers, or if you need to add other explanations related to the components, please let me know at any time, and I will adjust and improve them in a timely manner.

[0060] In some embodiments, the first door 1 and the second door 4 are interlocked. When one door is open, the other door remains locked to prevent direct communication between the outside humid air and the air in the packaging room 5. Specifically, the operation of the buffer room 3 relies on the automated linkage system of the humidity detection device, control unit, and execution components (air curtain machine 2, dehumidification equipment, and door body), combined with the door interlocking mechanism, to form a standardized and precise humidity protection process, which can be divided into two scenarios: "personnel / material entry" and "personnel / material exit".

[0061] Personnel / materials entering the scene

[0062] Both the first door 1 and the second door 4 are closed and locked. The humidity detection device monitors the humidity in the buffer room 3 in real time. The control unit is in standby mode, and the air curtain machine 2 and the dehumidification equipment are not started. When personnel or materials trigger the command to open the first door 1, the control unit simultaneously receives the door opening signal and immediately drives the air curtain machine 2 to start, forming a high-speed air barrier from top to bottom. At the same time, because the first door 1 and the second door 4 are interlocked, the second door 4 remains locked, preventing the outside humid air from directly connecting to the packaging room 5 when both doors are opened at the same time.

[0063] After personnel / materials enter buffer room 3, the first door 1 is closed. The control unit receives the closing signal from the first door 1, and the air curtain machine 2 stops operating. At this time, the humidity detection device transmits the real-time humidity data of buffer room 3 to the control unit. The control unit compares the detected value with the preset humidity range. If the detected humidity is higher than the set value, the control unit drives the dehumidification device to start and dehumidify the air in buffer room 3. If the detected humidity is within the set range, the dehumidification device remains closed. When the humidity detection device detects that the humidity of buffer room 3 has dropped to the set range, it transmits a compliance signal to the control unit. The control unit immediately issues a prompt signal and simultaneously unlocks the second door 4. Personnel / materials can then open the second door 4 to enter packaging room 5. After entering, the second door 4 is closed, and the system returns to its initial standby state.

[0064] Personnel / materials outing scenarios

[0065] Both the first door 1 and the second door 4 are closed and locked. The humidity detection device monitors that the humidity in the buffer room 3 is consistent with the humidity in the packaging room 5, and the control unit is on standby. When personnel / materials trigger the command to open the second door 4, the control unit receives the signal and, due to the door interlocking mechanism, the first door 1 remains locked. After personnel / materials enter the buffer room 3, the second door 4 is closed, and the control unit simultaneously monitors the humidity in the buffer room 3.

[0066] When personnel / materials trigger the command to open the first door 1, the control unit immediately drives the air curtain machine 2 to start, forming an air barrier to prevent humid air from entering the buffer room 3 when the first door 1 is open; at the same time, the second door 4 remains locked to prevent a large amount of low-humidity air in the packaging room 5 from escaping through the buffer room 3. After personnel / materials leave the buffer room 3, the first door 1 is closed, the control unit receives the closing signal, and the air curtain machine 2 stops operating; after the humidity detection device confirms that the humidity in the buffer room 3 is normal, the system returns to its initial state. In this embodiment, the humidity detection device collects data in real time, and the control unit automatically judges and drives the dehumidification equipment to start and stop, eliminating the need for manual monitoring and operation, and avoiding humidity exceeding the standard due to the lag in manual judgment; at the same time, the setting of the prompt signal can accurately inform personnel when the second door 4 can be opened, which not only ensures the stability of the humidity in the packaging room 5, but also improves the efficiency of personnel entry and exit, which is especially suitable for industrial continuous production scenarios and reduces the interference of manual operation on the production process.

[0067] Furthermore, the interlocking structure between the first door 1 and the second door 4 physically prevents the possibility of both doors opening simultaneously, completely avoiding direct communication between the high-humidity air outside and the low-humidity air in the packaging room 5. This solves the problem of humid air intrusion during door switching gaps in traditional non-interlocking designs. At the same time, the forced linkage between the air curtain machine 2 and the first door 1 ensures that there is always an air barrier blocking humid air during door opening. This double protection further reduces the probability of humid air intrusion, providing a stable guarantee for the low-humidity environment of the packaging room 5.

[0068] The entire system employs a closed-loop design with real-time detection, automatic control, precise prompts, and interlocking protection to create a humidity transition buffer zone in buffer room 3. Regardless of personnel or material entry or exit, it prevents external humid air from directly entering packaging room 5 and also prevents the significant loss of low-humidity air within packaging room 5. This ensures that the humidity in packaging room 5 remains within a preset low-humidity range, eliminating the problems of moisture absorption, clumping, and quality deterioration in easily hygroscopic powdered products due to humidity fluctuations, thus guaranteeing the stability of the entire product packaging process. The activation of the air curtain machine 2 is linked to the opening status of the first door 1, ensuring continuous operation of the air curtain machine 2 while the first door 1 is open.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A packaging system for moisture-absorbing powder products, comprising a packaging room (5); characterized in that: The packaging room (5) is equipped with a dehumidifier unit (22) connected to the inside of the packaging room (5) and is used to continuously dehumidify the air inside the packaging room (5) so that the inside of the packaging room (5) is maintained in a preset low humidity environment. The dehumidification unit (22) includes a dehumidifier (19) and a refrigeration unit (11) connected by pipes. The refrigeration unit (11) provides a cold source to the dehumidifier (19) through the refrigerant inlet pipe (12). The dehumidifier (19) draws humid air from the packaging room (5) through the suction pipe (14), and after the surface cooler in the dehumidifier (19) cools and precipitates water, the dry air is mixed with fresh air and sent back to the packaging room (5) through the exhaust pipe (15). At the same time, some humid air is discharged through the regeneration air pipe (21) to maintain the dryness and freshness of the air in the packaging room (5).

2. The packaging system for easily absorbing moisture powder products according to claim 1, characterized in that, The dehumidifier unit (22) is connected to the packaging room (5) through a first connecting path, a second connecting path and a third connecting path; The first connecting path is set as an air intake path, the second connecting path is set as a fresh air path, and the third connecting path is set as a regenerated air path.

3. A packaging system for easily hygroscopic powder products according to claim 2, characterized in that, The first connecting path is provided with a first surface cooler (17), a second surface cooler (18) and a third surface cooler (20). The dehumidifier (19) is located between the second surface cooler (18) and the third surface cooler (20), and an exhaust duct (15) is provided between the dehumidifier (19) and the third surface cooler (20). The third surface cooler (20) is connected to the packaging room (5) through the duct. The first surface cooler (17) and the second surface cooler (18) are connected by a pipe, and the first surface cooler (17) is connected to the outside through a fresh air duct (16).

4. A packaging system for easily absorbing moisture powder products according to claim 3, characterized in that, The second connection path is connected to the packaging room (5) and to the second surface cooler (18) through the air suction pipe (14).

5. A packaging system for moisture-absorbing powder products according to claim 2, characterized in that, The third connection path connects the packaging room (5) to the dehumidifier (19) through the exhaust duct (15), and the dehumidifier (19) connects to the outside.

6. A packaging system for moisture-absorbing powder products according to claim 1, characterized in that, The refrigeration unit (11) also includes a refrigerant outlet pipe (13). The refrigeration unit (11) is connected to the dehumidifier (19) through the refrigerant inlet pipe (12) and the refrigerant outlet pipe (13). The refrigerant inlet pipe (12) and the refrigerant outlet pipe (13) form a refrigerant circulation loop with the dehumidifier (19) and provide a cold source for the first surface cooler (17), the second surface cooler (18) and the third surface cooler (20) in the dehumidifier (19) to achieve cooling and dehumidification of the air in the packaging room (5).

7. A packaging system for moisture-absorbing powder products according to claim 6, characterized in that, The packaging room (5) is also equipped with a feeder (7) and a discharge machine; The feed inlet (6) of the feeder (7) is connected to the packaging hopper (9) of the discharge machine; The discharge machine is a screw discharge machine (10).

8. A packaging system for moisture-absorbing powder products according to claim 1, characterized in that, The packaging room (5) is also equipped with an isolation room, which includes a buffer room (3), a first door (1), a second door (4) and an air curtain machine (2). The first door (1) and the second door (4) are respectively located on both sides of the buffer room (3), and the air curtain machine (2) is located on top of the first door (1); When the first door (1) is opened, the air curtain machine (2) is activated to form an air barrier from top to bottom, blocking the outside humid air from entering the buffer room (3). After the first door (1) is closed, the dehumidification equipment of the buffer room (3) is started to reduce the humidity in the buffer room (3). After the humidity in the buffer room (3) reaches the set range, the second door (4) is opened to enter the packaging room (5).

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