A freezer for quick freezing and cold storage of catch on a fishing boat and a method of using the same

Abstract

The application relates to the technical field of fishing boat refrigerators, and discloses a refrigerator for quick freezing and cold storage of catch on a fishing boat, which comprises a refrigerator body, a door is hingedly installed on the front face of the refrigerator body, and the internal storage space of the refrigerator body is divided into a quick freezing area and a cold storage area. The refrigerator has the functions of quick freezing and cold storage, the quick freezing area and the cold storage area are interconnected, marine products enter the refrigerator in batches, the marine products enter the quick freezing area when entering the refrigerator, and then enter the cold storage area after being quickly frozen to a set temperature; the quick freezing area has small air flow resistance, the cold storage area has large air flow resistance, the quick freezing area has large refrigerating capacity, the cold storage area has small refrigerating capacity, the quick freezing and cold storage requirements are simultaneously met, the refrigerating capacity can be automatically distributed between the quick freezing area and the cold storage area when marine products are loaded, and the functions of quick freezing and cold storage are simultaneously realized.

Description

Technical Field

[0001] This invention relates to the field of cold storage technology for fishing vessels, specifically to a cold storage facility on a fishing vessel for quick-freezing and refrigerating catches, and its usage method. Background Technology

[0002] Different foods require different temperatures for long-term storage. Vegetables and fruits require refrigeration temperatures of 5–0°C, while seafood and meat require refrigeration temperatures of -18–-25°C, with some requiring refrigeration down to -60°C. Among these foods, seafood requires the shortest time to cool from ambient temperature to refrigeration temperature. This is to quickly overcome the ice crystal period and prevent changes in protein and meat quality. Conventional cold storage facilities typically include a quick-freezing room and a cold storage room. The quick-freezing room is responsible for rapidly cooling food to refrigeration temperature, while the cold storage room is responsible for long-term refrigeration. The quick-freezing room and cold storage room are often separated by a partition with doors for personnel or machinery to enter and exit. The quick-freezing room and cold storage room are equipped with evaporators and fans, respectively. When it is necessary to switch from quick-freezing to refrigeration, the door between the quick-freezing room and the cold storage room needs to be opened, and the food needs to be transferred from the quick-freezing room to the cold storage room manually or mechanically. This process is not only cumbersome but also very costly.

[0003] Nearshore fishing vessels typically operate on a 1-2 week fishing cycle. They generally work with ice, spreading crushed ice on the surface of the crates containing the catch for cooling and preservation. However, the temperature of crushed ice is above 0°C, which does not meet the optimal refrigeration temperature of -18°C. Furthermore, the cold is transferred from the ice to the catch via conduction, resulting in slow cooling and increased spoilage of the catch. Working with ice also increases the vessel's load, fuel consumption, and costs.

[0004] To better refrigerate the catch, a cold storage room needs to be installed in the hold of the fishing boat. The hold of the fishing boat is located below the deck, with only one entrance and exit, and the space is small. A fishing boat will go out to sea several times to cast nets, catch fish, and haul in the nets. The cold storage room on the fishing boat needs to meet the following requirements: (1) Use the interval between hauling in the nets to quickly freeze the catch from the previous haul to below -18°C. (2) Refrigerate all the catch at -18°C. (3) Personnel do not need to enter the cold storage room to reduce temperature fluctuations caused by personnel. (4) Minimize the number of partitions in the cold storage room to expand the refrigeration space. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to provide a cold storage facility for quick-freezing and refrigerating catches on fishing vessels and a method for using it, so as to solve the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a cold storage for quick-freezing and refrigerating catches on a fishing vessel, comprising a cold storage body, a door hinged to the front of the cold storage body, the internal storage space of the cold storage body being divided into a quick-freezing area and a refrigeration area, an air duct being provided on the left side of the quick-freezing area and the refrigeration area, the quick-freezing area and the refrigeration area being interconnected, a first baffle being provided between the quick-freezing area and the refrigeration area, a second baffle being provided between the quick-freezing area and the refrigeration area and the air duct, a motor being fixedly installed on the left side of the front of the cold storage body, an impeller being fixedly installed on the output shaft of the motor, and a refrigeration unit being provided inside the air duct.

[0009] Preferably, the surface of the second baffle is provided with air hole one and air hole two. Air hole one corresponds to the quick-freezing area and air hole two corresponds to the refrigeration area. Preferably, a sorting frame is stacked inside the quick-freezing area and the refrigeration area. The wind resistance of the quick-freezing area is less than that of the refrigeration area, and the cooling capacity of the quick-freezing area is greater than that of the refrigeration area. The sorting frame stores the catch that needs to be frozen.

[0010] Preferably, the impeller is located inside the air duct, and there are at least two impellers arranged vertically. Each impeller corresponds to a motor, and the motor drives the impeller to rotate, thereby generating airflow inside the cold storage room and causing cold air to flow.

[0011] Preferably, the first baffle is fixedly installed on the inner side of the cold storage body, and two baffles are symmetrically arranged on the left and right sides of the inner side of the cold storage body.

[0012] Preferably, the surface of the second baffle is provided with air hole one and air hole two. Air hole one corresponds to the quick-freezing area and air hole two corresponds to the refrigeration area. Cold air enters the quick-freezing area and the refrigeration area through the air holes.

[0013] This invention also provides a method for using a cold storage facility on a fishing vessel for quick-freezing and refrigerating catches, the method of use being as follows:

[0014] S1: The area ratio of quick-freezing area to cold storage area is determined according to the catch of a fishing boat in one trip;

[0015] S2: Before the first net haul, the cold storage is empty. Under the action of the motor, the air flows evenly throughout the cold storage. The refrigeration unit cools the entire cold storage to the refrigeration temperature. After the first catch, the catch is placed in the first batch of sorting frames. Then, batches of sorting frames are loaded into the cold storage. After the first batch of sorting frames are placed in the quick-freezing area of ​​the cold storage, baffles one and two form a return air blockage, so that most of the air flows in the quick-freezing area to quickly freeze the first batch of catch. A small amount of air flows in the refrigeration area to maintain the temperature of the refrigeration area. After the core temperature of the first batch of catch drops to the refrigeration temperature, the second net haul is carried out.

[0016] S3: The catch from the second net haul is placed in the second batch of sorting frames, with the same number of frames as the first batch. The first batch of sorting frames in the cold storage is pushed to the rear of the cold storage. Then, the second batch of sorting frames is loaded into the quick-freezing area of ​​the cold storage. At this time, the first batch of sorting frames forms a return air barrier, allowing most of the air to flow in the quick-freezing area to quickly freeze the second batch of catch, while a small amount of air flows in the refrigeration area to maintain the temperature of the first batch of catch and the remaining refrigeration area.

[0017] S4: The procedure for storing the catch after the third and subsequent hauls is the same as the second batch. Each batch of catch is placed in the quick-freezing area, while the previous batch is moved to the cold storage area. Through proper volume design, the number of catches in each batch and the number of nets hauled by the fishing boat can be the same. The fishing boat can quickly freeze the catch each time it hauls in the net. After the last haul, the cold storage is just full, and the boat returns fully loaded, making full use of the cabin space.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This invention relates to a cold storage facility on a fishing vessel for quick-freezing and refrigeration of catches, and its usage method. The cold storage facility has both quick-freezing and refrigeration functions. The quick-freezing area and the refrigeration area are interconnected. Seafood enters the cold storage facility in batches. When entering the cold storage facility, the seafood first enters the quick-freezing area and is quick-frozen to the set temperature before entering the refrigeration area. Due to the stacking position of the seafood in the cold storage facility, the air circulation resistance is low in the quick-freezing area and high in the refrigeration area, resulting in a large cooling capacity in the quick-freezing area and a small cooling capacity in the refrigeration area, thus simultaneously meeting the requirements of quick-freezing and refrigeration. It adopts a single refrigeration system and a single storage body, and utilizes the placement position of the seafood to form the quick-freezing area and the refrigeration area. When the vessel is empty, it can cool the cold storage facility simultaneously and evenly. When seafood is loaded, it can automatically distribute the cooling capacity between the quick-freezing area and the refrigeration area, thus simultaneously realizing the functions of quick-freezing and refrigeration. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the present invention. Figure 1 ;

[0022] Figure 3 This is a schematic diagram of the internal structure of the present invention. Figure 2 ;

[0023] Figure 4 This is a schematic diagram of the front structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the AA cross-sectional structure of the present invention.

[0025] In the diagram: 1. Cold storage body; 2. Door; 3. Quick-freezing area; 4. Refrigeration area; 5. Air duct; 6. Baffle 1; 7. Baffle 2; 8. Motor; 9. Impeller; 10. Refrigeration unit; 11. Rear of cold storage; 12. Sorting frame; 701. Air vent 1; 702. Air vent 2. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-5 This invention provides a technical solution: a cold storage for quick-freezing and refrigerating catches on a fishing vessel, comprising a cold storage body 1, a door 2, a quick-freezing area 3, a refrigeration area 4, an air duct 5, a first baffle 6, a second baffle 7, a motor 8, an impeller 9, a refrigeration unit 10, a rear section 11, a sorting frame 12, a first air vent 701, and a second air vent 702. The door 2 is hinged to the front of the cold storage body 1, with a large overlap surface and good sealing effect. The internal storage space of the cold storage body 1 is divided into a quick-freezing area. 3. Cold storage area 4, quick-freezing area 3, and cold storage area 4 are provided with air ducts 5 on the left side. Quick-freezing area 3 is located in front of cold storage area 4, and sorting frames 12 are stacked inside quick-freezing area 3 and cold storage area 4. The air resistance of quick-freezing area 3 is less than that of cold storage area 4, and the cooling capacity of quick-freezing area 3 is greater than that of cold storage area 4. Seafood is appropriately quick-frozen by quick-freezing area 3 being located in front of cold storage area 4.

[0028] A baffle 6 is installed between the quick-freezing zone 3 and the refrigeration zone 4, and a baffle 7 is installed between the quick-freezing zone 3, the refrigeration zone 4 and the air duct 5. The baffle 6 is fixedly installed on the inside of the cold storage body 1, and two baffles 6 are symmetrically arranged on the left and right sides of the inside of the cold storage body 1. The surface of the baffle 7 is provided with air holes 701 and 702. Air holes 701 correspond to the quick-freezing zone 3, and air holes 702 correspond to the refrigeration zone 4. Cold air enters the quick-freezing zone 3 and the refrigeration zone 4 through the air holes.

[0029] A motor 8 is fixedly installed on the left side of the front of the cold storage body 1. An impeller 9 is fixedly installed on the output shaft of the motor 8. A refrigeration unit 10 is installed inside the air duct 5. The impeller 9 is located inside the air duct 5, and there are two impellers 9 arranged vertically. The impeller 9 corresponds to the motor 8 one by one. The motor 8 drives the impeller 9 to rotate, so that wind is generated inside the cold storage body 1, which drives the flow of cold air.

[0030] A method for using a cold storage facility on a fishing vessel for quick-freezing and refrigerating catches is as follows:

[0031] S1: The area ratio of quick-freezing zone 3 to cold storage zone 4 is determined according to the catch quantity of a fishing boat on a single voyage.

[0032] S2: Before the first net haul, the cold storage 1 is empty. Under the action of motor 8, the air flows evenly throughout the cold storage 1. The refrigeration unit 10 cools the entire cold storage 1 to the refrigeration temperature. After the first catch, the catch is placed in the first batch sorting frame 12. Then, batches of sorting frames 12 are loaded into the cold storage 1. After the first batch of sorting frames 12 are placed in the quick-freezing area of ​​the cold storage, baffle 1 6 and baffle 2 7 form a return air blockage, so that most of the air flows in the quick-freezing area 3 to quick-freeze the first batch of catch. A small amount of air flows in the refrigeration area 4 to maintain the temperature of the refrigeration area 4. After the center temperature of the first batch of catch drops to the refrigeration temperature, the second net haul is carried out.

[0033] S3: The catch from the second net haul is placed in the second batch sorting frame 12. The number of sorting frames in the second batch is the same as that in the first batch. The first batch of sorting frames 12 in the cold storage 1 is pushed to the rear refrigeration area 4 of the cold storage 1. Then, the second batch of sorting frames 12 are loaded into the quick-freezing area 3 of the cold storage 1. At this time, the first batch of sorting frames 12 forms a return air barrier, so that most of the air flows in the quick-freezing area 3 to quick-freeze the second batch of catch. A small amount of air flows in the refrigeration area 4 to maintain the temperature of the first batch of catch and the remaining refrigeration area 4.

[0034] S4: The procedure for storing the catch after the third and subsequent hauls is the same as the second batch. Each batch of catch is placed in the quick-freezing area 3, while the previous batch is moved to the cold storage area 4. Through proper volume design, the number of catches in each batch and the number of nets hauled by the fishing boat can be the same. The fishing boat can quickly freeze the catch each time it hauls in the net. After the last haul, the cold storage is just full, and the boat returns fully loaded, making full use of the cabin space.

[0035] Working principle: First, the area ratio of the quick-freezing zone 3 to the cold storage zone 4 is determined according to the catch quantity of a fishing boat in a single fishing trip. Before the first net haul, the cold storage 1 is empty. Under the action of the motor 8, the air flows evenly throughout the cold storage 1. The refrigeration unit 10 cools the entire cold storage 1 to the refrigeration temperature. After the first catch, the catch is placed in the first batch of sorting frames 12. Then, batches of sorting frames 12 are loaded into the cold storage 1. After the first batch of sorting frames 12 are placed in the quick-freezing zone, the baffle 6 and the baffle 7 form a return air barrier, causing most of the air to flow within the quick-freezing zone 3, thus quickly freezing the first batch of catch. Part of the air circulates within the cold storage zone 4 to maintain its temperature. After the core temperature of the first batch of catches drops to the cold storage temperature, a second net haul is performed. The catches from the second haul are placed in the second batch sorting frames 12, the same number as the first batch. The first batch of sorting frames 12 in the cold storage body 1 are pushed towards the rear of the cold storage zone 4. Then, the second batch of sorting frames 12 are loaded into the quick-freezing zone 3 of the cold storage body 1. At this point, the first batch of sorting frames 12 forms a return air barrier, causing most of the air to circulate within the quick-freezing zone 3 for quick-freezing the second batch of catches, while a small portion of the air remains in the cold storage zone. Within zone 4, the flow maintains the temperature of the first batch of catch and the remaining catch in cold storage zone 4. The procedure for storing the third and subsequent catches is the same as the second batch. Each batch of catch is placed in quick-freezing zone 3, while the previous batch is moved to cold storage zone 4. Through proper volume design, the batch size and the number of nets hauled in by the fishing boat are kept the same. Each time the fishing boat hauls in the nets, the catch is immediately quick-frozen. After the final haul, the cold storage is just full, ensuring a full load and making full use of the boat's hold space. The cold storage has both quick-freezing and refrigeration functions. Quick-freezing zone 3 and cold storage zone 4 are interconnected, allowing seafood to enter the cold storage in batches. Upon entering the cold storage, the seafood first enters the quick-freezing zone 3. After being quick-frozen to the set temperature, it then enters the refrigeration zone 4. Due to the placement of the seafood within the cold storage, the quick-freezing zone 3 has low airflow resistance, while the refrigeration zone 4 has high airflow resistance. This results in a larger cooling capacity in the quick-freezing zone 3 and a smaller cooling capacity in the refrigeration zone 4, simultaneously meeting the requirements for both quick-freezing and refrigeration. A single refrigeration system and a single storage unit are used, with the placement of the seafood forming the quick-freezing zone 3 and the refrigeration zone 4. When empty, the cold storage can be cooled simultaneously and evenly. When seafood is loaded, the cooling capacity can be automatically distributed between the quick-freezing zone 3 and the refrigeration zone 4, achieving both quick-freezing and refrigeration functions.

[0036] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A cold storage facility on a fishing vessel for quick-freezing and refrigerating catches, comprising a cold storage body (1), characterized in that: The cold storage body (1) has a door (2) installed on the front through a hinge. The internal storage space of the cold storage body (1) is divided into a quick-freezing area (3) and a refrigeration area (4). An air duct (5) is provided on the left side of the quick-freezing area (3) and the refrigeration area (4). A baffle (6) is provided between the quick-freezing area (3) and the refrigeration area (4). A baffle (7) is provided between the quick-freezing area (3), the refrigeration area (4) and the air duct (5). A motor (8) is fixedly installed on the left side of the front of the cold storage body (1). An impeller (9) is fixedly installed on the output shaft of the motor (8). A refrigeration unit (10) is provided inside the air duct (5). The quick-freezing area (3) is located in front of the refrigeration area (4); The quick-freezing area (3) and the cold storage area (4) are stacked with sorting frames (12). The wind resistance of the quick-freezing area (3) is less than that of the cold storage area (4). The cooling capacity of the quick-freezing area (3) is greater than that of the cold storage area (4). The usage method is as follows: S1: The area ratio of the quick-freezing area (3) and the cold storage area (4) depends on the catch of a fishing boat in one trip. S2: Before the first net haul, the cold storage body (1) is empty. Under the action of the motor (8), the air flows evenly in the entire cold storage body (1). The refrigeration unit (10) cools the entire cold storage body (1) to the refrigeration temperature. After the first catch, the catch is placed in the first batch of sorting frames (12). Then, batches of sorting frames (12) are loaded into the cold storage body (1). After the first batch of sorting frames (12) are placed in the quick-freezing area of ​​the cold storage, the baffle one (6) and the baffle two (7) form a return air block, so that most of the air flows in the quick-freezing area (3) to quickly freeze the first batch of catch. A small amount of air flows in the refrigeration area (4) to maintain the temperature of the refrigeration area (4). After the center temperature of the first batch of catch drops to the refrigeration temperature, the second net haul is carried out. S3: The catch from the second net is placed in the second batch of sorting frames (12). The number of sorting frames in the second batch is the same as that in the first batch. The first batch of sorting frames (12) in the cold storage body (1) is pushed to the cold storage area (4) at the rear of the cold storage. Then, the second batch of sorting frames (12) is loaded into the quick-freezing area (3) of the cold storage body (1). At this time, the first batch of sorting frames (12) forms a return air barrier, so that most of the air flows in the quick-freezing area (3) to quickly freeze the second batch of catch. A small amount of air flows in the cold storage area (4) to maintain the temperature of the first batch of catch and the remaining cold storage area (4). S4: The steps for storing the third and subsequent catches are the same as the second batch. Each batch of catches is placed in the quick-freezing area (3) and the previous batch of catches is moved to the cold storage area (4). Through proper volume design, the batch and the number of nets taken by the fishing boat can be the same. The fishing boat can quickly freeze the catches immediately each time it takes to take to the cold storage. After the last net is taken, the cold storage is just full.

2. A cold storage facility on a fishing vessel for quick-freezing and refrigerating catches according to claim 1, characterized in that: The surface of the baffle 2 (7) is provided with air hole 1 (701) and air hole 2 (702), the air hole 1 (701) corresponds to the quick-freezing area (3), and the air hole 2 (702) corresponds to the refrigeration area (4).

3. A cold storage facility on a fishing vessel for quick-freezing and refrigerating catches according to claim 1, characterized in that: The impeller (9) is located inside the air duct (5), and there are at least two impellers (9) arranged on the top and bottom, and the impellers (9) correspond one-to-one with the motor (8).

4. A cold storage facility on a fishing vessel for quick-freezing and refrigerating catches according to claim 1, characterized in that: The first baffle (6) is fixedly installed on the inner side of the cold storage body (1), and two baffles (6) are symmetrically arranged on the left and right sides of the inner side of the cold storage body (1).

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