Multi-type fish oil product cold chain storage device

Abstract

The present application relates to fish oil processing storage technical field, especially for a kind of multiple type fish oil product cold chain storage device, including cabinet, bottom shell, refrigerant pump and the refrigeration coil being arranged in the inside of cabinet interlayer, the inside of the cabinet is provided with the tray of bearing fish oil bottle;Reciprocating pump type air circulation and absorption mechanism in the present application reciprocate under the driving of piston plate in driving assembly, variable volume chamber is formed in long shell, realize the air internal circulation dehumidification in cabinet, when piston plate goes up, humid air in refrigeration chamber is inhaled by being pushed away only inward opening first one-way cover by air inlet hole, air flow subsequently passes through detachable moisture absorption component to complete depth dehumidification, when piston plate goes down, chamber volume is reduced to form positive pressure, dry air is turned to open only outward opening second one-way cover by the resistance of detachable moisture absorption component, and is discharged back to refrigeration chamber by air outlet hole, to further inhibit the condensate generation in refrigeration chamber.

Description

Technical Field

[0001] This invention relates to the field of fish oil processing and storage technology, specifically to a cold chain storage device for various types of fish oil products. Background Technology

[0002] Fish oil is rich in unsaturated fatty acids, which oxidize rapidly upon contact with air after opening. The core function of refrigeration for fish oil is to slow down oxidation, maintain its activity, and preserve its quality stability. Direct refrigeration can significantly inhibit peroxidation and maintain freshness. When the ambient temperature exceeds 25°C, it is also recommended to refrigerate unopened products to effectively prevent capsule adhesion and rancidity of the contents. For high-purity fish oil with Omega-3 purity ≥90%, low temperature can better maintain its liquid stability and prevent the effective components from precipitating out and causing turbidity. Whether it is capsule or liquid form, and whether it is opened or not, fish oil products need to be refrigerated.

[0003] When refrigerating fish oil, especially in processing areas, the bottles need to be frequently removed and placed. Frequent opening and closing of the refrigerator door causes external humid air to condense into water. Once water droplets seep into the oil along the bottle opening, they quickly trigger hydrolysis and rancidity. Triglycerides break down to generate free fatty acids, causing the acid value to soar and emitting a pungent, fishy, ​​and rancid smell. At the same time, the moisture accelerates the oxidation of unsaturated fatty acids, destroying valuable active ingredients such as EPA and DHA, and drastically reducing the nutritional value. Summary of the Invention

[0004] The purpose of this invention is to provide a cold chain storage device for various types of fish oil products, which has the function of absorbing moisture from the air inside the cold storage room to reduce the generation of condensate.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cold chain storage device for various types of fish oil products, comprising a cabinet, a bottom shell, a refrigerant pump, and a refrigeration coil disposed inside the cabinet's interlayer. The cabinet's interior is provided with a tray for holding fish oil bottles. The device also includes: The reciprocating pump type air circulation and absorption mechanism is in several units, and it uses the principle of reciprocating pump to make the air flow in the refrigerator compartment of the cabinet. The air inlet and air outlet of the reciprocating pump type air circulation and absorption mechanism are both located in the refrigerator compartment of the cabinet. The reciprocating pump type air circulation and absorption mechanism uses a sponge to absorb moisture from the air entering itself. The condensate collection and reuse mechanism is interconnected with the reciprocating pump-type air circulation and absorption mechanism. The condensate collection and reuse mechanism collects the condensate generated by the reciprocating pump-type air circulation and absorption mechanism and directs it to the vicinity of the refrigerant pump.

[0006] Preferably, the reciprocating pump-type air circulation and absorption mechanism includes: The long shell extends through the interlayer of the cabinet and has a V-shaped channel design at the bottom. An upper partition is also bolted to the inside of the long shell, forming a chamber for airflow inside itself. A sliding sleeve is also provided through the surface of the upper partition. The long housing has several air inlets on both sides of its surface, and a first one-way cover is hinged inside the long housing to close the air inlets. Several vents are provided on both sides of the surface of the long shell. The vents are located above the inlet. A second one-way cover is hinged to the outside of the long shell to close the vents. A detachable moisture-absorbing component is located between the upper partition and the chamber formed by the bottom of the inner wall of the long shell, and the moisture absorption method is sponge absorption; The piston plate is located between the detachable moisture-absorbing assembly and the upper partition plate, and is slidably connected to the inner wall of the long shell. A drive assembly is used to drive the piston plate to reciprocate up and down to change the volume inside the chamber above; The V-shaped isolation component is located at the lower part of the interior of the long housing, separating the V-shaped channel at the lower part of the interior of the long housing from the upper part of the interior.

[0007] Preferably, the detachable moisture-absorbing component consists of a box body, moisture-absorbing cotton, a variable-diameter through hole, and a mesh. The box body is slidably connected to the inner wall of the long shell, and the end face of the box body is bolted to the long shell. The mesh is welded to the bottom of the box body, the moisture-absorbing cotton is placed inside the box body, and the variable-diameter through hole is opened through the surface of the moisture-absorbing cotton.

[0008] Preferably, the inner diameter of the variable diameter through hole is designed to gradually decrease from bottom to top.

[0009] Preferably, the drive assembly includes a drive motor, a crankshaft, and a connecting rod. The drive motor is bolted to the outside of the long housing, the crankshaft is rotatably connected to the inner wall of the long housing, the output shaft of the drive motor is fixed to the crankshaft, the connecting rod is hinged to the crankshaft, and a movable column is hinged to the other end of the connecting rod. The movable column is bolted to the piston plate, and the surface of the movable column is also slidably connected to the inner wall of the sliding sleeve. A squeezing rod aligned with the moisture-absorbing cotton is fixed to the bottom of the piston plate.

[0010] Preferably, the extrusion rod is aligned with the surface of the absorbent cotton and located outside the area at the top outlet of the variable diameter through hole.

[0011] Preferably, the V-shaped isolation assembly consists of a V-shaped plate, a drain outlet, and a third one-way cover. The V-shaped plate is bolted to the lower part of the interior of the long housing. The drain outlet is opened through the surface of the V-shaped plate. The third one-way cover is hinged to the bottom of the V-shaped plate and is used to close the drain outlet. The top of the drain outlet is aligned with the bottom of the mesh.

[0012] Preferably, the first one-way cover, the second one-way cover, and the third one-way cover are all made of plastic. The first one-way cover can only be opened towards the inside of the long shell, the second one-way cover can only be opened away from the outside of the long shell, and the third one-way cover can only be opened towards the bottom of the V-shaped plate.

[0013] Preferably, the condensate collection and reuse mechanism consists of a return pipe, an annular cavity, and a solenoid valve. The annular cavity is bolted to the inside of the bottom shell and located around the refrigerant pump. The return pipe connects the long shell and the annular cavity. The solenoid valve is connected to the annular cavity, and the outlet end of the solenoid valve is located outside the bottom shell.

[0014] Preferably, the drive motor is located inside the cabinet and around the refrigeration coil.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The reciprocating pump-type air circulation and absorption mechanism in this invention utilizes the reciprocating motion of the piston plate driven by the drive assembly to form a variable volume chamber within the long shell, achieving internal air circulation and dehumidification within the cabinet. When the piston plate moves upward, humid air in the refrigerator compartment is drawn in through the air inlet, which pushes open the first one-way cover that can only be opened inward. The airflow then passes through the detachable moisture-absorbing component to complete deep dehumidification. When the piston plate moves downward, the chamber volume shrinks, creating positive pressure. The dried air, due to the resistance of the detachable moisture-absorbing component, pushes open the second one-way cover that can only be opened outward and is discharged back into the refrigerator compartment through the air outlet, thereby inhibiting the formation of condensate in the refrigerator compartment and effectively protecting the active ingredients such as EPA and DHA in fish oil from hydrolysis and destruction.

[0016] 2. The moisture-absorbing cotton in the detachable moisture-absorbing component of this invention is made of hydrophilic PVA sponge, which has variable diameter through holes with an inner diameter that gradually decreases from bottom to top. When humid air is drawn upward and passes through the variable diameter through holes, the large pore section first intercepts large water droplets, and the micro pore section further filters out fine water mist, which is quickly absorbed and locked by the moisture-absorbing cotton, thus achieving further capture of condensate. When dry air descends, the outlet at the top of the variable diameter through hole is extremely narrow, and the PVA sponge becomes dense after absorbing water, significantly increasing the air resistance and preventing the airflow from flowing back. At the same time, the extrusion rod compresses the moisture-absorbing cotton to squeeze out the absorbed water, so that it can maintain a high moisture absorption capacity.

[0017] 3. In this invention, when the extrusion rod squeezes out the droplets from the absorbent cotton, the liquid falls onto the V-shaped plate and is pushed open by the drain outlet, opening the third one-way cover that can only be opened downwards. The liquid then flows smoothly into the lower V-shaped channel and into the return pipe. When the piston plate moves upwards to suck, the third one-way cover closes under the action of air pressure difference, tightly sealing the drain outlet and preventing the collected condensate and moisture in the channel from being sucked back. The inclined design of the V-shaped plate can accelerate drainage.

[0018] 4. This invention collects low-temperature condensate into a metal annular cavity around the refrigerant pump through a return pipeline, thereby achieving cold energy recovery and auxiliary heat dissipation, and realizing the utilization of condensate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure in this invention; Figure 2 This is a schematic diagram of the cabinet interlayer structure in this invention; Figure 3 This is a schematic diagram of the structure of the long shell and its surface in this invention; Figure 4 This is a schematic diagram of the structure of the detachable moisture-absorbing component after it has been removed from the inside of the long shell in this invention; Figure 5 This is a partial cross-sectional view of the long shell in this invention; Figure 6 This is a side cross-sectional view of the long shell in this invention; Figure 7 This is a schematic diagram of the driving component in this invention; Figure 8 This is a bottom view of the V-shaped plate in this invention; Figure 9 This is a schematic diagram showing the absorbent cotton after it has been removed from the box in this invention; Figure 10 For the present invention Figure 9 Enlarged structural diagram at point A; Figure 11 This is a schematic diagram of the condensate collection and reuse mechanism in this invention; Figure 12 This is a cross-sectional view of the annular cavity in this invention; Figure 13 This is a schematic diagram of the tray structure in this invention.

[0020] In the diagram: 100, cabinet; 110, tray; 200, bottom shell; 300, condensate collection and reuse mechanism; 310, return pipe; 320, annular cavity; 330, solenoid valve; 400, refrigeration coil; 500, refrigerant pump; 600, reciprocating pump air circulation and absorption mechanism; 610, long shell; 611, upper partition; 612, sliding sleeve; 620, air inlet; 630, air outlet; 640, first one-way valve. 650. Second one-way cover; 660. Detachable moisture-absorbing assembly; 661. Box body; 662. Moisture-absorbing cotton; 663. Variable diameter through hole; 664. Partition mesh; 670. V-shaped isolation assembly; 671. V-shaped plate; 672. Drain outlet; 673. Third one-way cover; 680. Piston plate; 681. Extrusion rod; 690. Drive assembly; 691. Drive motor; 692. Crankshaft; 693. Connecting rod; 694. Moving column. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-13 A cold chain storage device for various types of fish oil products includes a cabinet 100, a bottom shell 200, a refrigerant pump 500, and a refrigeration coil 400 installed inside the interlayer of the cabinet 100. The cabinet 100 contains a tray 110 for holding fish oil bottles. The device also includes a reciprocating pump-type air circulation and absorption mechanism 600 and a condensate collection and reuse mechanism 300. The reciprocating pump-type air circulation and absorption mechanism 600 comprises several units and employs a principle similar to a reciprocating pump to circulate the air within the refrigerated compartment of the cabinet 100. The air inlet and outlet of the reciprocating pump-type air circulation and absorption mechanism 600 are both located in the refrigerator compartment of the cabinet 100. The reciprocating pump-type air circulation and absorption mechanism 600 uses a sponge to absorb moisture from the air entering it. The condensate collection and reuse mechanism 300 is connected to the reciprocating pump-type air circulation and absorption mechanism 600. The condensate collection and reuse mechanism 300 collects the condensate generated by the reciprocating pump-type air circulation and absorption mechanism 600 and directs it to the vicinity of the refrigerant pump 500.

[0023] Specifically, the reciprocating pump-type air circulation and absorption mechanism 600 includes an air inlet 620, an air outlet 630, a detachable moisture absorption component 660, a piston plate 680, a drive component 690, and a V-shaped isolation component 670. A long shell 610 extends through the interlayer of the cabinet 100 and has a V-shaped channel design at its bottom. An upper partition 611 is bolted to the inside of the long shell 610, and a sliding sleeve 612 is also provided through the surface of the upper partition 611, forming an airflow chamber within itself. Several air inlets 620 are located on both sides of the surface of the long shell 610. A first one-way cover 640 is hinged inside the long shell 610 to close the air inlets 620. The first one-way cover 640 can only be opened towards the inside of the long shell 610, and its outer diameter is larger than the inner diameter of the air inlets 620. Several air outlets 630 are also present. On both sides of the surface of the long housing 610, the air outlet 630 is located above the air inlet 620. The long housing 610 is externally hinged with a second one-way cover 650 that closes the air outlet 630. The second one-way cover 650 can only be opened in a direction away from the outside of the long housing 610. The outer diameter of the second one-way cover 650 is larger than the inner diameter of the air outlet 630. The detachable moisture-absorbing component 660 is located between the upper partition 611 and the chamber formed by the bottom of the inner wall of the long housing 610. The moisture absorption method is a sponge. The piston plate 680 is located between the detachable moisture-absorbing component 660 and the upper partition 611 and is slidably connected to the inner wall of the long housing 610. The drive component 690 is used to drive the piston plate 680 to move up and down reciprocally to change the volume of the upper part of the chamber. The V-shaped isolation component 670 is located at the lower part of the interior of the long housing 610 and separates the V-shaped channel at the lower part of the interior of the long housing 610 from the upper part of the interior.

[0024] Furthermore, the detachable moisture-absorbing component 660 consists of a box 661, moisture-absorbing cotton 662, a variable-diameter through-hole 663, and a mesh 664. The box 661 is slidably connected to the inner wall of the long shell 610, and the end face of the box 661 is bolted to the long shell 610. The mesh 664 is welded to the bottom of the box 661. The moisture-absorbing cotton 662 is placed inside the box 661. The variable-diameter through-hole 663 is opened through the surface of the moisture-absorbing cotton 662. The inner diameter of the variable-diameter through-hole 663 is gradually reduced from bottom to top. The material is a hydrophilic polymer foam material, such as PVA sponge, which has high density, is soft after absorbing water, and hardens when dry. If the moisture-absorbing cotton 662 needs to be replaced during long-term use, simply loosen the bolts fixing the box 661 to the long shell 610, then remove the box 661, replace it with a new moisture-absorbing cotton 662, and then put it back into the box 661 for fixing.

[0025] Furthermore, the drive assembly 690 includes a drive motor 691, a crankshaft 692, and a connecting rod 693. The drive motor 691 is bolted to the outside of the long housing 610. The crankshaft 692 is rotatably connected to the inner wall of the long housing 610. The output shaft of the drive motor 691 is fixed to the crankshaft 692. The connecting rod 693 is hinged to the crankshaft 692. The other end of the connecting rod 693 is hinged to a movable column 694, which is bolted to the piston plate 680. The surface of the movable column 694 is also slidably connected to the inner wall of the sliding sleeve 612, allowing the movable column 694 to slide up and down along the inner wall of the sliding sleeve 612. The bottom of the piston plate 680 is also fixed with a squeezing rod 681 aligned with the moisture-absorbing cotton 662. The squeezing rod 681 is aligned with the surface of the moisture-absorbing cotton 662 and is located in an area outside the top outlet of the variable diameter through hole 663, preventing the squeezing rod 681 from blocking the variable diameter through hole 663.

[0026] During operation, the drive motor 691 is activated, causing the crankshaft 692 to rotate. The crankshaft 692 then drives the upper end of the connecting rod 693 in a circular motion, which in turn causes the lower movable column 694 to reciprocate along the inner wall of the sliding sleeve 612. This, in turn, causes the piston plate 680 to reciprocate up and down. When the piston plate 680 approaches the upper partition 611, the space above the internal cavity of the long housing 610 increases, and the pressure decreases. The air inside the refrigerator pushes open the first one-way cover 640, while the second one-way cover 650 presses against the vent 630. At this time, the air inside the long housing 610 moves upward, passing through the variable-diameter through-hole 663 on the surface of the moisture-absorbing cotton 662. The diameter of the through-hole gradually decreases, and the airflow speed suddenly accelerates at the narrow point. Tiny water droplets entrained within, due to greater inertia, are unable to turn sharply with the airflow and thus break free from the airflow and collide with the hole wall. Large pores intercept large water droplets, while micro pores "sieve" out fine water mist, which is then absorbed by the absorbent cotton 662. As the piston plate 680 moves downward away from the upper partition 611, the space above the cavity decreases, the pressure increases, and the air moves downward. Because the outlet at the top of the variable diameter through-hole 663 is relatively small, the absorbed air has difficulty entering the variable diameter through-hole 663. In addition, the absorbent cotton 662 itself is made of PVA sponge, which has a high density and air resistance. Therefore, most of the air pushes open the second one-way cover 650 and is discharged outward, realizing the discharge of the air after moisture absorption treatment, thereby reducing the moisture inside the refrigerator and reducing the generation of condensate inside the refrigerator. As the piston plate 680 moves downward, it drives the squeezing rod 681 to squeeze the absorbent cotton 662, causing the absorbed moisture inside to turn into droplets and be discharged downward, keeping the absorbent cotton 662 highly efficient.

[0027] Furthermore, the V-shaped isolation assembly 670 consists of a V-shaped plate 671, a drain outlet 672, and a third one-way cover 673. The V-shaped plate 671 is bolted to the lower part of the interior of the long housing 610. The drain outlet 672 is opened through the surface of the V-shaped plate 671. The third one-way cover 673 is hinged to the bottom of the V-shaped plate 671 and is used to close the drain outlet 672. The top of the drain outlet 672 is aligned with the bottom of the mesh 664. The first one-way cover 640, the second one-way cover 650, and the third one-way cover 673 are all made of plastic, making them lightweight and able to be easily opened or closed under the influence of airflow. The third one-way cover 673 can only be opened towards the bottom of the V-shaped plate 671.

[0028] During the downward movement of the piston plate 680, which squeezes the moisture-absorbing cotton 662 downward through the squeeze rod 681, the third one-way cover 673 is in an open state. The squeezed droplets can fall onto the surface of the V-shaped plate 671 and then enter the V-shaped channel below the long shell 610 through the drain port 672. When the piston plate 680 moves upward, the airflow below the V-shaped plate 671 moves upward and simultaneously drives the third one-way cover 673 to close, preventing a large amount of moisture from being carried back from the V-shaped channel.

[0029] Furthermore, the condensate collection and reuse mechanism 300 consists of a return pipe 310, an annular cavity 320, and a solenoid valve 330. The annular cavity 320 is bolted to the inside of the bottom shell 200 and located around the refrigerant pump 500. The return pipe 310 connects the long shell 610 to the annular cavity 320. The solenoid valve 330 is connected to the annular cavity 320, and the outlet end of the solenoid valve 330 is located outside the bottom shell 200. The droplets, i.e., the condensate, are discharged through the V-shaped channel and then enter the interior of the annular cavity 320 through the return pipe 310, bringing cooling energy to the annular cavity 320. At the same time, the annular cavity 320 is made of metal, which lowers the air temperature around the refrigerant pump 500. Combined with the fan inside the bottom shell 200 (a common heat dissipation method for the refrigerant pump 500 in the art), the refrigerant pump 500 is better cooled, achieving the effect of recovering the cooling energy of the condensate.

[0030] Furthermore, the drive motor 691 is located inside the cabinet 100 and around the refrigeration coil 400, so that the cooling capacity generated by the refrigeration coil 400 can dissipate heat from the drive motor 691. However, the drive motor 691 is not always in use. In actual use, a humidity sensor can be installed inside the refrigerator. When the humidity exceeds 40%, the drive motor 691 can be controlled to absorb and expel moisture through the refrigerator's own circuit system or program, such as a PLC controller.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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. 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 limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cold chain storage device for various types of fish oil products, comprising a cabinet (100), a bottom shell (200), a refrigerant pump (500), and a refrigeration coil (400) disposed inside the interlayer of the cabinet (100), wherein the interior of the cabinet (100) is provided with a tray (110) for holding fish oil bottles, characterized in that: Also includes: There are several reciprocating pump-type air circulation and absorption mechanisms (600), and they use the principle of reciprocating pump to make the air flow in the refrigerator compartment of the cabinet (100). The air inlet and outlet of the reciprocating pump-type air circulation and absorption mechanism (600) are located in the refrigerator compartment of the cabinet (100). The reciprocating pump-type air circulation and absorption mechanism (600) uses a sponge to absorb moisture from the air entering its interior. A condensate collection and reuse mechanism (300) is connected to the reciprocating pump-type air circulation and absorption mechanism (600). The condensate collection and reuse mechanism (300) collects the condensate generated by the reciprocating pump-type air circulation and absorption mechanism (600) and directs it to the vicinity of the refrigerant pump (500). The reciprocating pump-type air circulation and absorption mechanism (600) includes: The long shell (610) extends through the interlayer of the cabinet (100) and has a V-shaped channel design at the bottom. The interior of the long shell (610) is also bolted with an upper partition (611), forming a chamber for air flow inside itself. The surface of the upper partition (611) is also provided with a sliding sleeve (612). There are several air inlets (620) and they are opened on both sides of the surface of the long shell (610). The long shell (610) is hinged to the inside and has a first one-way cover (640) to close the air inlets (620). A number of vents (630) are provided on both sides of the surface of the long shell (610). The vents (630) are located above the air inlet (620). A second one-way cover (650) is hinged to the outside of the long shell (610) to close the vents (630). A detachable moisture-absorbing component (660) is located between the upper partition (611) and the chamber formed at the bottom of the inner wall of the long shell (610), and the moisture absorption method is sponge absorption; Piston plate (680) is located between the detachable moisture-absorbing assembly (660) and the upper partition plate (611), and is slidably connected to the inner wall of the long shell (610); A drive assembly (690) is used to drive the piston plate (680) to reciprocate up and down to change the volume inside the upper chamber; V-shaped isolation component (670) is located below the interior of the long housing (610) and separates the V-shaped channel below the interior of the long housing (610) from the upper interior. The condensate collection and reuse mechanism (300) consists of a return pipe (310), an annular cavity (320) and a solenoid valve (330). The annular cavity (320) is bolted to the inside of the bottom shell (200) and located around the refrigerant pump (500). The return pipe (310) connects the long shell (610) and the annular cavity (320) to each other. The solenoid valve (330) is connected to the annular cavity (320), and the outlet end of the solenoid valve (330) is located outside the bottom shell (200).

2. The cold chain storage device for multiple types of fish oil products according to claim 1, characterized in that: The detachable moisture-absorbing assembly (660) consists of a box (661), moisture-absorbing cotton (662), a variable-diameter through hole (663), and a mesh (664). The box (661) is slidably connected to the inner wall of the long shell (610), and the end face of the box (661) is bolted to the long shell (610). The mesh (664) is welded to the bottom of the box (661). The moisture-absorbing cotton (662) is placed inside the box (661). The variable-diameter through hole (663) is opened through the surface of the moisture-absorbing cotton (662).

3. A cold chain storage device for multiple types of fish oil products according to claim 2, characterized in that: The inner diameter of the variable diameter through hole (663) is designed to gradually decrease from bottom to top.

4. A cold chain storage device for multiple types of fish oil products according to claim 2, characterized in that: The drive assembly (690) includes a drive motor (691), a crankshaft (692), and a connecting rod (693). The drive motor (691) is bolted to the outside of the long housing (610). The crankshaft (692) is rotatably connected to the inner wall of the long housing (610). The output shaft of the drive motor (691) is fixed to the crankshaft (692). The connecting rod (693) is hinged to the crankshaft (692). A movable column (694) is hinged to the other end of the connecting rod (693). The movable column (694) is bolted to the piston plate (680). The surface of the movable column (694) is also slidably connected to the inner wall of the sliding sleeve (612). A squeezing rod (681) aligned with the absorbent cotton (662) is fixed to the bottom of the piston plate (680).

5. A cold chain storage device for multiple types of fish oil products according to claim 4, characterized in that: The extrusion bar (681) is aligned with the surface of the absorbent cotton (662) and located outside the area at the top outlet of the variable diameter through hole (663).

6. A cold chain storage device for multiple types of fish oil products according to claim 2, characterized in that: The V-shaped isolation assembly (670) consists of a V-shaped plate (671), a drain outlet (672), and a third one-way cover (673). The V-shaped plate (671) is bolted to the lower part of the interior of the long housing (610). The drain outlet (672) is opened through the surface of the V-shaped plate (671). The third one-way cover (673) is hinged to the bottom of the V-shaped plate (671) and is used to close the drain outlet (672). The top of the drain outlet (672) is aligned with the bottom of the mesh (664).

7. A cold chain storage device for multiple types of fish oil products according to claim 6, characterized in that: The first one-way cover (640), the second one-way cover (650) and the third one-way cover (673) are all made of plastic. The first one-way cover (640) can only be opened towards the inside of the long shell (610), the second one-way cover (650) can only be opened away from the outside of the long shell (610), and the third one-way cover (673) can only be opened towards the bottom of the V-shaped plate (671).

8. A cold chain storage device for multiple types of fish oil products according to claim 4, characterized in that: The drive motor (691) is located inside the cabinet (100) and around the cooling coil (400).

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