Device for freezing uncooked shrimp and crab products by liquid nitrogen
By pushing the placement rack into the liquid nitrogen freezer and setting up a conveying hard tube, the problems of long contact time and poor freezing effect in the existing devices are solved, and safety and freezing effect are improved.
Patent Information
- Application Number
- CN202422157061.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-09-03
AI Technical Summary
During the operation of the existing liquid nitrogen refrigeration device, the contact time between personnel and low-temperature nitrogen is too long, which can easily cause frostbite. At the same time, the liquid nitrogen distribution is uneven and the freezing effect is poor.
A device for frozen raw shrimp and crab products of liquid nitrogen is designed. By pushing the food-filled placement rack into the liquid nitrogen freezer box as a whole, and multiple conveying hard tubes are installed in the insulation box, the contact between liquid nitrogen and food is improved.
It reduces the contact time between personnel and low-temperature nitrogen, reduces the risk of frostbite, and significantly improves the freezing effect by improving liquid nitrogen distribution.
Smart Images
Figure CN222982373U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of food freezing devices, in particular to a device for freezing raw shrimps and crabs with liquid nitrogen. Background Art
[0002] At present, in the existing liquid nitrogen freezing device, a plurality of pull-out storage boxes are arranged in a freezing box, and the storage boxes are filled with foods to be frozen. However, such a device has defects. After the door of the liquid nitrogen freezing box is opened, a plurality of storage boxes need to be pushed into the interior of the freezing box, so that the contact time between the operator and the low-temperature nitrogen gas in the freezing box is very long, which is likely to cause low-temperature frostbite to the personnel. In addition, the liquid nitrogen is unevenly distributed, resulting in a small contact degree between the liquid nitrogen and the food, and a poor freezing effect.
[0003] Therefore, those skilled in the art provide a device for freezing raw shrimps and crabs with liquid nitrogen. The placing rack filled with foods is integrally pushed into the liquid nitrogen freezing box, which can reduce the long-term contact between personnel and low-temperature nitrogen gas. By setting a conveying hard pipe, the contact degree with the food is improved, thereby improving the freezing effect. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a device for freezing raw shrimps and crabs with liquid nitrogen. The placing rack filled with foods is integrally pushed into the liquid nitrogen freezing box, which can reduce the long-term contact between personnel and low-temperature nitrogen gas. By means of a conveying hard pipe, the contact degree between the conveyed liquid nitrogen and the food is improved, and the freezing effect is improved.
[0005] To solve the above technical problems, the utility model adopts the following technical solutions:
[0006] A device for freezing raw shrimps and crabs with liquid nitrogen of the utility model comprises a heat preservation box. A liquid nitrogen tank accommodation chamber and a placing rack accommodation chamber are arranged inside the heat preservation box. The liquid nitrogen tank accommodation chamber and the placing rack accommodation chamber are communicated through a liquid nitrogen conveying flexible pipe. A placing rack is placed in the placing rack accommodation chamber. The placing rack comprises a rack body and a storage box. A plurality of storage boxes are adjustably connected to the rack body, and the plurality of storage boxes are horizontally and spacedly connected to the rack body;
[0007] A plurality of conveying hard pipes are fixedly connected to the rear wall body of the placing rack accommodation chamber. The conveying hard pipes are horizontally arranged in the front-back direction of the heat preservation box. The plurality of conveying hard pipes are sequentially located in a plurality of spaced spaces of the storage boxes. A plurality of spray holes are uniformly formed in the conveying hard pipes.
[0008] Preferably, a plurality of screw holes are uniformly formed in the rack body. After a bolt passes through the screw hole, the storage box and the rack body are connected together.
[0009] Preferably, the storage box includes four side walls and a bottom plate. The bottoms of the four side walls are fixedly connected to the bottom plate, and ventilation holes are evenly formed in the bottom plate.
[0010] Preferably, a plurality of conveying rigid pipes are arranged side by side in each interval space. After the conveying rigid pipes communicate with the rear wall of the placement rack accommodation compartment, they are connected to the liquid nitrogen conveying hose.
[0011] Preferably, a liquid nitrogen tank is placed in the liquid nitrogen tank accommodation compartment, and the liquid nitrogen tank is connected to the liquid nitrogen conveying hose through a pump body.
[0012] Preferably, a control panel is installed on the side wall of the incubator. The control panel is electrically connected to a temperature detector and a timer. The temperature detector is installed inside the placement rack accommodation compartment, and the timer is installed on the outer wall of the incubator. Two box doors are hingedly connected to the wall of the incubator. The two box doors are respectively hinged to the front walls of the liquid nitrogen tank accommodation compartment and the placement rack accommodation compartment; the pump body is electrically connected to the control panel.
[0013] Preferably, wheels are installed at the bottom of the placement rack, and four limiting grooves are formed at the bottom inside the placement rack accommodation compartment. The wheels are located in the limiting grooves.
[0014] Compared with the prior art, the beneficial technical effects of the present utility model are as follows:
[0015] (1) The present utility model adopts the method of quickly pushing the placement rack with multiple storage boxes into the incubator as a whole for input and output of materials. During this operation process, the pump body is in a closed state, and no liquid nitrogen is supplied, reducing the contact time between the human body and the low-temperature nitrogen gas remaining in the incubator and effectively reducing personnel injuries.
[0016] (2) The present utility model is provided with a plurality of conveying rigid pipes in the incubator. After the placement rack is pushed into the incubator, the conveying rigid pipes are inserted into the interval spaces of the storage boxes of the placement rack. The position of the conveying rigid pipes does not affect the pushing of the placement rack into the incubator, enabling the liquid nitrogen ejected from the conveying rigid pipes to be ejected bidirectionally from the bottom and above of the storage boxes for heat exchange to freeze food, with a better freezing effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present utility model will be further described below with reference to the accompanying drawings.
[0018] Figure 1 is a schematic structural diagram of a device for freezing raw shrimps and crabs with liquid nitrogen according to the present utility model;
[0019] Figure 2 is a schematic structural diagram of the placement rack according to the present utility model.
[0020] Description of reference numerals: 1. insulation box; 2. liquid nitrogen tank accommodation compartment; 3. placement rack; 4. storage box; 5. ventilation holes; 6. delivery hard pipe; 7. spray holes; 8. wheels; 9. placement rack accommodation compartment; 10. box door; 11. control panel; 12. limit groove. Detailed implementation manners
[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0022] As Figure 1-2 shown, a device for freezing raw shrimps and crabs with liquid nitrogen includes an insulation box 1. Inside the insulation box 1, there are a liquid nitrogen tank accommodation compartment 2 and a placement rack accommodation compartment 9. The liquid nitrogen tank accommodation compartment 2 and the placement rack accommodation compartment 9 are connected through a liquid nitrogen delivery hose. A placement rack 3 is placed in the placement rack accommodation compartment 9. The placement rack 3 includes a rack body and storage boxes 4. A plurality of storage boxes 4 are adjustably connected to the rack body, and the plurality of storage boxes 4 are horizontally spaced and connected to the rack body.
[0023] A plurality of delivery hard pipes 6 are fixedly connected to the rear wall body of the placement rack accommodation compartment 9. The delivery hard pipes 6 are horizontally arranged in the front-back direction of the insulation box 1. The plurality of delivery hard pipes 6 are sequentially located in the plurality of spaced spaces of the storage boxes 4. A plurality of spray holes 7 are evenly opened on the delivery hard pipes 6.
[0024] Specifically, the position of the delivery hard pipe 6 does not affect the placement of the placement rack 3 into the placement rack accommodation compartment 9 of the insulation box 1. The delivery hard pipe 6 is made of steel pipe, and one end of the delivery hard pipe 6 is connected to the rear wall body of the placement rack accommodation compartment 9 by welding.
[0025] A plurality of screw holes are evenly opened on the rack body. After a bolt passes through the screw hole, the storage box 4 and the rack body are connected together.
[0026] Specifically, by adjusting the distance between the storage boxes 4, after the placement rack 3 is pushed into the insulation box 1, the delivery hard pipe 6 can be inserted into the spaced space of the storage boxes 4, so that the liquid nitrogen sprayed from the spray holes of the delivery hard pipe 6 can be sprayed onto the bottom and above of the storage boxes 4 to exchange heat and freeze food, thereby achieving a better freezing effect on the shrimp and crab products.
[0027] The storage box 4 includes four side walls and a bottom plate. The bottoms of the four side walls are fixedly connected to the bottom plate. A plurality of ventilation holes 5 are evenly opened on the bottom plate. Liquid nitrogen can be sprayed from the delivery hard pipe 6 onto the bottom plate and contact the shrimp and crab products through the ventilation holes 5.
[0028] A plurality of delivery hard tubes 6 are arranged side by side in each of the spaced spaces, and after the delivery hard tubes 6 communicate with the rear wall of the placement rack accommodation chamber 9, they are connected to the liquid nitrogen delivery hose.
[0029] Specifically, three or more delivery hard tubes 6 are arranged side by side in each spaced space.
[0030] Specifically, the delivery hard tube 6 at the top only has spray holes opened at the bottom, and the delivery hard tube 6 at the bottom only has spray holes opened at the top, so as to make full use of liquid nitrogen.
[0031] A liquid nitrogen tank is placed in the liquid nitrogen tank accommodation chamber 2, and the liquid nitrogen tank is connected to the liquid nitrogen delivery hose through a pump body.
[0032] Specifically, the pump body is used to extract liquid nitrogen from the liquid nitrogen tank and output it from the spray holes 7 to the bottom and above of the storage box 4 through the gas delivery hose and the delivery hard tube, and contact with the food in the storage box 4 for heat exchange.
[0033] A control panel 11 is installed on the side wall of the incubator 1. The control panel 11 is electrically connected to a temperature detector and a timer. The temperature detector is installed inside the placement rack accommodation chamber 9, the timer is installed on the outer wall of the incubator 1, and two cabinet doors 10 are connected to the wall of the incubator 1 in an openable and closable manner. The two cabinet doors 10 are respectively hinged on the front walls of the liquid nitrogen tank accommodation chamber 2 and the placement rack accommodation chamber 9; the pump body is electrically connected to the control panel 11.
[0034] Specifically, the temperature detector is used to detect the temperature inside the placement rack accommodation chamber 9. When the temperature is higher than the set value, the PLC controller controls the pump body to extract a large amount of liquid nitrogen to reduce the temperature to the required range, and the freezing time can be controlled by the timer. Specifically, the temperature of liquid nitrogen is -100 to -110 °C, and the time for using liquid nitrogen to cool and freeze is 10 to 15 minutes.
[0035] Wheels 8 are installed at the bottom of the placement rack 3. Four limit grooves 12 are opened at the bottom inside the placement rack accommodation chamber 9. The wheels 8 are located in the limit grooves 12. After the placement rack 3 is pushed into the placement rack accommodation chamber 9, the wheels 8 are located in the four limit grooves, thereby reducing the movement of the placement rack 3.
[0036] Specifically, the sealing of the incubator 1 and the switch locks of the cabinet doors 10 are of existing structures and will not be elaborated here.
[0037] The usage process of the present utility model is as follows:
[0038] First, according to the distances and positions between the conveying rigid pipes 6 arranged in the incubator 1, connect the storage box 4 to the frame of the placement rack 3 by bolts, and place the shrimp and crab products in the storage box 4 of the placement rack 3 in advance. After the preparation work is completed, open the box door 10, quickly push the placement rack 3 into the placement rack accommodation compartment 9 of the incubator 1, so that the conveying rigid pipes 6 are inserted into the intervals of the storage box 4, and then close the box door 10. During this operation process, the pump body is in the closed state and no liquid nitrogen coolant is supplied.
[0039] Secondly, use the control panel 11 to turn on the pump body. The pump body extracts liquid nitrogen from the liquid nitrogen tank and outputs it from the spray holes 7 to the bottom and above of the storage box 4 through the gas transmission hose and the conveying rigid pipe 6, and contacts the shrimp and crab products in the storage box 4.
[0040] In addition, if the temperature detector detects that the temperature in the placement rack accommodation compartment 9 is higher than the set value, the PLC controller controls the pump body to extract a large amount of liquid nitrogen to reduce it to the required temperature, and the freezing time can be controlled by the timer.
[0041] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.
[0042] The above-described embodiments are only descriptions of the preferred modes of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solution of the present invention shall fall within the protection scope determined by the claims of the present invention.
Claims
1. A device for freezing raw shrimp and crab products with liquid nitrogen, characterized in that: The invention comprises an insulated box (1), wherein a liquid nitrogen tank storage chamber (2) and a storage rack storage chamber (9) are arranged inside the insulated box (1), wherein the liquid nitrogen tank storage chamber (2) and the storage rack storage chamber (9) are connected via a liquid nitrogen delivery hose, wherein a storage rack (3) is placed inside the storage rack storage chamber (9), wherein the storage rack (3) comprises a frame body and a material storage box (4), wherein a plurality of material storage boxes (4) are adjustably connected to the frame body, and wherein the plurality of material storage boxes (4) are horizontally spaced and connected to the frame body; A plurality of conveying hard pipes (6) are fixedly connected to the rear wall of the placement rack storage compartment (9), and the conveying hard pipes (6) are horizontally arranged in the front-rear direction of the thermal insulation box (1). The plurality of conveying hard pipes (6) are sequentially located in a plurality of spacing spaces of the storage box (4), and a plurality of spray holes (7) are evenly arranged on the conveying hard pipes (6).
2. The device for freezing raw shrimp and crab products with liquid nitrogen according to claim 1, characterized in that: The frame is evenly provided with a plurality of screw holes, and bolts are passed through the screw holes to connect the material storage box (4) and the frame together.
3. The device for freezing raw shrimp and crab products with liquid nitrogen according to claim 2, characterized in that: The material storage box (4) comprises four side walls and a bottom plate, the bottoms of the four side walls are fixedly connected to the bottom plate, and the bottom plate is evenly provided with air holes (5).
4. The device for freezing raw shrimp and crab products with liquid nitrogen according to claim 1, characterized in that: A plurality of delivery hard pipes (6) are arranged side by side in each of the partition spaces, and the delivery hard pipes (6) are connected to the rear wall of the placement rack storage compartment (9) and then connected to the liquid nitrogen delivery hose.
5. The device for freezing raw shrimp and crab products with liquid nitrogen according to claim 4, characterized in that: A liquid nitrogen tank is placed in the liquid nitrogen tank storage cabin (2), and the liquid nitrogen tank is connected to the liquid nitrogen delivery hose via a pump body.
6. The device for freezing raw shrimp and crab products with liquid nitrogen according to claim 5, characterized in that: A control panel (11) is installed on the side wall of the thermal insulation box (1); the control panel (11) is electrically connected to a temperature detector and a timer; the temperature detector is installed inside the storage rack storage compartment (9); the timer is installed on the outer wall of the thermal insulation box (1); two doors (10) are openably connected to the wall of the thermal insulation box (1); the two doors (10) are respectively hinged on the front wall of the liquid nitrogen tank storage compartment (2) and the storage rack storage compartment (9); the pump body is electrically connected to the control panel (11).
7. The device for freezing raw shrimp and crab products with liquid nitrogen according to claim 5, characterized in that: The bottom of the placement rack (3) is provided with wheels (8), and the bottom of the interior of the placement rack storage compartment (9) is provided with four limiting grooves (12), and the wheels (8) are located in the limiting grooves (12).