Quick thawing device for quick-frozen food

Abstract

The invention discloses a quick-frozen food quick thawing device, and relates to the technical field of food thawing, the quick-frozen food quick thawing device comprises a device box and a box cover arranged at the top of the device box, and further comprises a conveying mesh belt horizontally arranged in the device box, and material stirring assemblies are arranged on the belt surface of the conveying mesh belt; and the two vibration assemblies are arranged on the inner walls of the two opposite sides of the device box correspondingly, through rotation of the conveying net belt, the material stirring assemblies are driven to move along the vibration assemblies, the vibration assemblies can be used for driving the material stirring assemblies to act, and the material stirring assemblies moving and acting along with the conveying net belt are used. According to the invention, continuous operation can be realized, the unfreezing efficiency can be improved, food can be vibrated and turned over, the food is heated more uniformly, adhesion is effectively prevented, the unfreezing uniformity is improved, the unfreezing effect is improved, waste heat can be effectively recovered, the energy consumption is reduced, and the purposes of saving energy and reducing the operation cost are realized.

Description

Technical Field

[0001] This invention relates to the field of food thawing technology, and in particular to a device for rapid thawing of quick-frozen foods. Background Technology

[0002] Frozen foods occupy an important position in the food processing industry and consumer market due to their convenience and freshness (such as frozen meat chunks, meatballs, and diced fruits and vegetables). Rapid and even thawing is a key step in ensuring the quality and taste of frozen foods during subsequent processing.

[0003] First, traditional thawing devices are mostly batch-based, requiring manual placement of frozen foods into the thawing chamber in batches, followed by manual removal after thawing. This is not only cumbersome and labor-intensive, but also results in discontinuous feeding, thawing, and discharging processes, leading to chaotic production rhythms, low processing efficiency, and difficulty in meeting the capacity demands of large-scale industrial production.

[0004] Secondly, during the thawing process, frozen foods tend to release moisture as their surface temperature rises, causing food items to stick together or between the food and the transport carrier. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a rapid thawing device for quick-frozen foods.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A rapid defrosting device for frozen food includes a device box, a box cover disposed on the top of the device box, and further includes: A conveyor belt is horizontally installed inside the device box, and material feeding components are arranged on the surface of the conveyor belt; Two vibration components are respectively installed on the inner walls of opposite sides of the device box. By rotating the conveyor belt, the feeding component is driven to move along the vibration component. The vibration component can drive the feeding component to perform the action. The feeding component, which moves and moves with the conveyor belt, vibrates and moves the food during the process of the conveyor belt transporting the food. A thawing water spray circulation assembly is disposed on one side of the device box, and the thawing water spray circulation assembly extends into the interior of the device box; An exhaust assembly is located at the upper end of the box cover; A heat exchange assembly is disposed at the upper end of the box cover, and the heat exchange assembly is connected to the exhaust assembly; A hot air assembly is disposed on the device housing, the hot air assembly extends into the interior of the device housing, and the hot air assembly is connected to the heat exchange assembly.

[0007] As a further improvement of the present invention, the material feeding assembly includes a mounting frame fixedly embedded on the surface of the conveyor belt. A rotating rod is provided above the mounting frame. The two ends of the rotating rod pass through the two side walls of the mounting frame respectively, and the rotating rod is rotatably connected to the mounting frame. Two torsion springs are fitted on the rotating rod. The two torsion springs are respectively arranged on both sides of the mounting frame. One end of the torsion spring is fixed to the side wall of the mounting frame, and the other end of the torsion spring is fixed to the side wall of the rotating rod. Flat grooves are provided on the lower side walls of both ends of the rotating rod. Guide grooves are provided on the sides of the flat grooves. A feeding frame arranged in a row is fixedly sleeved on the side wall of the rotating rod.

[0008] As a further improvement of the present invention, the vibration assembly includes a support guide plate fixed on the inner side wall of the device box. A plurality of extrusion blocks are fixed on the upper surface of the support guide plate. A plurality of grooves are provided on the upper surface of the support guide plate. The extrusion blocks and the grooves are spaced apart, and the grooves are located on one side of the extrusion blocks. An elastic band is provided inside the groove, and both ends of the elastic band are fixed on the inner wall of the groove.

[0009] As a further improvement of the present invention, the defrosting water spray circulation assembly includes a circulating hot water tank and a pump disposed outside the device box. The input end of the pump is connected to the circulating hot water tank. A water supply pipe is fixed on the inner wall of the device box. Spray pipes located above the conveyor belt are arranged and connected on the side wall of the water supply pipe. The end of the water supply pipe away from the spray pipe passes through the device box and is connected to the output end of the pump. A water collection hopper is fixed on the inner wall of the device box. The water collection hopper is located below the upper conveyor belt. A return water pipe is connected to the side wall of the water collection hopper. The end of the return water pipe away from the water collection hopper passes through the device box and is connected to the side wall of the circulating hot water tank.

[0010] As a further improvement of the present invention, the exhaust assembly includes an exhaust fan installed on the upper end of the cover, the input end of the exhaust fan is connected to an exhaust pipe, the end of the exhaust pipe away from the exhaust fan is connected to the upper end of the cover, and the exhaust pipe communicates with the interior of the device box, and the output end of the exhaust fan is connected to a vent pipe.

[0011] As a further improvement of the present invention, the heat exchange assembly includes a heat exchange cylinder installed on the upper end of the cover. A column is provided at the center of the interior of the heat exchange cylinder. The two ends of the column are respectively fixed to the inner top wall and the inner bottom wall of the heat exchange cylinder. A hollow spiral heat exchange plate is fixedly connected between the inner wall of the heat exchange cylinder and the column. The end of the vent pipe away from the exhaust fan passes through the heat exchange cylinder and is connected to the hollow spiral heat exchange plate. The vent pipe is connected to the upper end of the hollow spiral heat exchange plate. An exhaust pipe is provided through the side wall of the heat exchange cylinder and is connected to the lower end of the hollow spiral heat exchange plate.

[0012] As a further improvement of the present invention, the hot air assembly includes a hot air blower installed on the outer wall of the device box, a blower hood installed on the inner wall of the device box, the blower hood penetrating the device box and connected to the output end of the hot air blower, an air outlet pipe communicating with the inside of the heat exchange cylinder connected to the upper part of the side wall of the heat exchange cylinder, the end of the air outlet pipe away from the heat exchange cylinder connected to the input end of the hot air blower, and an air inlet pipe communicating with the inside of the heat exchange cylinder connected to the lower part of the side wall of the heat exchange cylinder.

[0013] As a further improvement of the present invention, two belt rollers are horizontally arranged inside the device box, and both ends of the belt rollers are rotatably mounted on the inner wall of the device box. The conveyor belt is fitted onto the two belt rollers. An electric motor is installed on the outer wall of the device box, and the output shaft of the electric motor passes through the device box and is fixed to the end of one of the belt rollers.

[0014] As a further improvement of the present invention, a feed hopper fixed to the upper left side of the box cover is provided, and a discharge hopper fixed to the device box is provided on the right side wall of the device box, and the discharge hopper is located below the conveyor belt.

[0015] The beneficial effects of this invention are: Driven by a conveyor belt and a motor inside the device box, the continuous feeding, conveying, and discharging of frozen foods are achieved. The food is thawed while in motion, eliminating the need for manual turning or batch processing. This significantly improves processing capacity and production cycle time, enabling continuous operation and increasing efficiency.

[0016] The vibration component and the feeding component work together. On the one hand, the rotating rod of the feeding component can lift up and down, rotate and move the food as it passes the squeezing block of the support guide plate with the mesh belt to prevent accumulation. On the other hand, the rotating rod falls and hits the elastic belt, causing the mesh belt to vibrate and the food to roll, making the food heat more evenly, effectively preventing sticking, and thus improving the defrosting effect.

[0017] The exhaust assembly extracts the hot and humid air and sends it to the heat exchange assembly. The hot air assembly then uses the recovered heat to generate auxiliary hot air, which can reuse the heat energy of excess water vapor in the defrosting process, reducing energy consumption and achieving the goals of energy saving and reducing operating costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a rapid thawing device for quick-frozen food proposed in this invention; Figure 2 This is a schematic diagram of the exhaust assembly, heat exchange assembly, and hot air assembly of a rapid thawing device for quick-frozen food proposed in this invention. Figure 3 This is a schematic diagram of the thawing water spray circulation component of a rapid thawing device for quick-frozen food proposed in this invention; Figure 4This is a schematic diagram of the ventilation pipe, hollow spiral heat exchange plate, and column of a quick-freezing food rapid thawing device proposed in this invention. Figure 5 This is a schematic diagram of the conveyor belt, belt rollers, motor, vibration component, and feeding component of a quick-freezing food rapid thawing device proposed in this invention. Figure 6 This is a schematic diagram of the structure of the vibration component of a rapid thawing device for quick-frozen food proposed in this invention; Figure 7 This is a schematic diagram of the feeding assembly of a quick-freezing device for frozen food proposed in this invention.

[0019] In the diagram: 1. Device box, 2. Feed hopper, 3. Water pipe, 4. Pump, 5. Circulating hot water tank, 6. Return water pipe, 7. Motor, 8. Discharge hopper, 9. Box cover, 10. Heat exchange cylinder, 11. Exhaust pipe, 12. Vent pipe, 13. Exhaust fan, 14. Air outlet pipe, 15. Air outlet pipe, 16. Hot air blower, 17. Blower hood, 18. Air inlet pipe, 19. Water collection hopper, 20. Spray pipe, 21. Hollow spiral heat exchange plate, 22. Column, 23. Roller, 24. Conveyor belt, 25. Mounting frame, 26. Support guide plate, 27. Extrusion block, 28. Groove, 29. Elastic belt, 30. Rotating rod, 31. Flat groove, 32. Guide inclined groove, 33. Torsion spring, 34. Actuating frame. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] See Figures 1-7 A rapid defrosting device for frozen food includes a device box 1, a box cover 9 disposed on the top of the device box 1, and further includes: The conveyor belt 24 is horizontally installed inside the device box 1. The conveyor belt 24 has a certain degree of toughness, allowing it to vibrate slightly. Two rollers 23 are horizontally installed inside the device box 1, with both ends of the rollers 23 rotatably mounted on the inner wall of the device box 1. The conveyor belt 24 is fitted onto the two rollers 23. A motor 7 is installed on the outer wall of the device box 1. The output shaft of the motor 7 passes through the device box 1 and is fixed to the end of one of the rollers 23. The motor 7 drives the roller 23 to rotate, which in turn drives the conveyor belt 24 to rotate. The conveyor belt 24 can move the frozen food, allowing it to thaw during the movement. The thawed food can then be directly discharged, greatly improving the thawing efficiency.

[0022] A feed hopper 2, which is fixed to the upper left side of the box cover 9, is provided through the upper left side of the box cover 9. A discharge hopper 8, which is fixed to the device box 1, is provided through the right side wall of the device box 1, and the discharge hopper 8 is located below the conveyor belt 24.

[0023] Material feeding components are arranged on the surface of the conveyor belt 24. Each material feeding component includes a mounting frame 25 fixedly embedded on the surface of the conveyor belt 24. A rotating rod 30 is provided above the mounting frame 25. Both ends of the rotating rod 30 pass through the side walls of the mounting frame 25, and the rotating rod 30 is rotatably connected to the mounting frame 25. Two torsion springs 33 are fitted on the rotating rod 30. The two torsion springs 33 are respectively located on both sides of the mounting frame 25. One end of the torsion spring 33 is fixed to the side wall of the mounting frame 25, and the other end of the torsion spring 33 is fixed to the side wall of the rotating rod 30. Both ends of the rotating rod 30 have flat grooves 31 on their lower side walls. The side of the flat grooves 31 has guide grooves 32. When the rotating rod 30 contacts the extrusion block 27, the guide grooves 32 guide the rotating rod 30 to rotate a certain angle first. The rotating rod 30 is equipped with a rotating bracket 34 fixedly sleeved on its side wall. When the flat groove 31 contacts the inclined surface of the extrusion block 27, the rotating rod 30 is raised and deflected. The deflection of the rotating rod 30 drives the rotating bracket 34 to rotate, and at the same time drives the torsion spring 33 to twist and store force. When the flat groove 31 leaves the inclined surface of the extrusion block 27, the torsion force of the torsion spring 33 drives the rotating rod 30 to rotate. The rotation of the rotating rod 30 drives the rotating bracket 34 to move the frozen food, preventing the frozen food from piling up. At the same time, it can make the frozen food fully rotate, so that the hot water and hot air can contact the frozen food more fully and evenly, further improving the defrosting efficiency and effect.

[0024] Two vibration components are respectively installed on the inner walls of opposite sides of the device box 1. By rotating the conveyor belt 24, the feeding component is driven to move along the vibration components. The vibration components can drive the feeding component to perform actions. The feeding component, which moves and moves with the conveyor belt 24, vibrates and moves the food during the process of conveying food by the conveyor belt 24. The vibration assembly includes a support guide plate 26 fixed to the inner wall of the device box 1. Multiple extrusion blocks 27 are fixed on the upper surface of the support guide plate 26. Each extrusion block 27 has an inclined surface and a vertical surface. Multiple grooves 28 are provided on the upper surface of the support guide plate 26. The extrusion blocks 27 and the grooves 28 are spaced apart, and the grooves 28 are located on one side of the extrusion blocks 27. An elastic band 29 is provided inside the groove 28. Both ends of the elastic band 29 are fixed to the inner wall of the groove 28. When the rotating rod 30 moves to the vertical surface of the extrusion block 27, the rotating rod 30 will fall and hit the elastic band 29. The elasticity of the elastic band 29 can make the rotating rod 30 vibrate up and down, thereby driving the conveyor belt 24 to vibrate. This can make the frozen food on the conveyor belt 24 vibrate, promote the transfer of heat inside the frozen food, improve the thawing uniformity, and prevent the frozen food from sticking together.

[0025] The thawing water spray circulation assembly is located on one side of the device box 1, and the thawing water spray circulation assembly extends into the interior of the device box 1; The defrosting water spray circulation assembly includes a circulating hot water tank 5 located outside the device box 1 and a pump 4. The input end of the pump 4 is connected to the circulating hot water tank 5. A water supply pipe 3 is fixed on the inner wall of the device box 1. Spray pipes 20 located above the conveyor belt 24 are arranged and connected to the side wall of the water supply pipe 3. The end of the water supply pipe 3 away from the spray pipes 20 passes through the device box 1 and is connected to the output end of the pump 4. The pump 4 pumps the hot water inside the circulating hot water tank 5 into the spray pipes 20, and the hot water is sprayed onto the device box 1 through the spray pipes 20. The frozen food on the conveyor belt 24 can be thawed. A water collection hopper 19 is fixed on the inner wall of the device box 1. The water collection hopper 19 is located below the upper conveyor belt 24. A return water pipe 6 is connected to the side wall of the water collection hopper 19. The end of the return water pipe 6 away from the water collection hopper 19 passes through the device box 1 and is connected to the side wall of the circulating hot water tank 5. The hot water sprayed on the frozen food will fall into the water collection hopper 19 through the conveyor belt 24 and circulate back to the circulating hot water tank 5 through the return water pipe 6.

[0026] An exhaust assembly is located at the top of the cover 9. The exhaust assembly includes an exhaust fan 13 installed at the top of the cover 9. The input end of the exhaust fan 13 is connected to an exhaust pipe 14. The end of the exhaust pipe 14 away from the exhaust fan 13 is connected to the top of the cover 9 and is connected to the interior of the device box 1. The output end of the exhaust fan 13 is connected to a vent pipe 12. When hot water is sprayed onto the frozen food, water vapor will be generated. Excess water vapor needs to be discharged in time through the exhaust pipe 14. The water vapor still contains heat, which can be recovered and utilized through a heat exchange assembly.

[0027] A heat exchange assembly is located at the top of the cover 9 and is connected to the exhaust assembly. The heat exchange assembly includes a heat exchange cylinder 10 installed at the top of the cover 9. A column 22 is located at the center of the heat exchange cylinder 10. The two ends of the column 22 are fixed to the inner top wall and the inner bottom wall of the heat exchange cylinder 10, respectively. A hollow spiral heat exchange plate 21 is fixedly connected between the inner wall of the heat exchange cylinder 10 and the column 22. The end of the vent pipe 12 away from the exhaust fan 13 passes through the heat exchange cylinder 10 and is connected to the hollow spiral heat exchange plate 21. The vent pipe 12 is connected to the upper end of the hollow spiral heat exchange plate 21. An exhaust pipe 11 is provided through the side wall of the heat exchange cylinder 10 and is connected to the lower end of the hollow spiral heat exchange plate 21. Water vapor inside the device box 1 enters the hollow spiral heat exchange plate 21 through the vent pipe 12. The hollow spiral heat exchange plate 21 can transfer heat to the air in the heat exchange cylinder 10, realizing the recovery and utilization of water vapor heat.

[0028] A hot air assembly is mounted on the device housing 1, extending into the interior of the housing 1 and connected to the heat exchange assembly. The hot air assembly includes a hot air blower 16 mounted on the outer wall of the housing 1, and a blower hood 17 mounted on the inner wall of the housing 1. The blower hood 17 penetrates the housing 1 and connects to the output end of the hot air blower 16. An air outlet pipe 15, communicating with the interior of the heat exchange cylinder 10, is connected to the upper part of the side wall of the heat exchange cylinder 10. The end of the air outlet pipe 15 furthest from the heat exchange cylinder 10 is connected to the input end of the hot air blower 16. A connection is made to the lower part of the side wall of the heat exchange cylinder 10. The air inlet pipe 18, which is internally connected to the heat exchange cylinder 10, allows the hot air fan 16 to be started, which can introduce hot air into the blower hood 17. The blower hood 17 can blow hot air onto the frozen food on the conveyor belt 24, using the hot air to assist in defrosting. At the same time, the blowing of the hot air can make the heat exchange between the frozen food fully exchanged, making the heat distribution between the frozen food more even, thereby improving the defrosting efficiency and effect. When the excess water vapor in the device box 1 can heat the air in the heat exchange cylinder 10, the power of the hot air fan 16 can be reduced, achieving the purpose of energy saving.

[0029] When this invention is in use, during operation, frozen food enters from the feed hopper 2 at the top of the device box 1 and falls onto the upper conveyor belt 24. After the motor 7 starts, it drives the belt roller 23 to rotate, causing the conveyor belt 24 and the frozen food on it to move continuously towards the discharge hopper 8 on the right. During the movement, the pump 4 sprays hot water from the circulating hot water tank 5 onto the surface of the frozen food on the conveyor belt 24 through the water pipe 3 and the spray pipe 20 to heat and thaw it. The sprayed hot water passes through the conveyor belt 24 and falls into the lower water collection hopper 19, and then flows back into the circulating hot water tank 5 through the return water pipe 6 for recycling. Meanwhile, the exhaust fan 13 at the top of the box cover 9 extracts the excess water vapor generated by the hot water spray in the device box 1 through the air outlet pipe 14. The water vapor enters the heat exchange cylinder 10 through the air vent pipe 12 and exchanges heat with the hollow spiral heat exchange plate 21 fixed on the column 22, so that the air in the heat exchange cylinder 10 is heated. Part of the heated air enters the hot air fan 16 through the air inlet pipe 18, and then blows it onto the quick-frozen food on the conveyor belt 24 through the blower hood 17 to form auxiliary hot air defrosting. As the conveyor belt 24 operates continuously, it passes sequentially through the support guide plates 26 on both sides of the inner wall of the device box 1. The compression blocks 27 and grooves 28 spaced apart on the support guide plates 26 alternately block and release the conveyor belt 24. When the material-feeding assembly on the conveyor belt 24 moves with the belt to the compression block 27, the rotating rod 30 first rotates under the guidance of the guide groove 32, overcoming the elastic force of the torsion spring 33. This causes the flat groove 31 to fit against the inclined surface of the compression block 27, driving the agitator frame 34 to lift upwards and agitate the frozen food, preventing its accumulation. Subsequently, the rotating rod 30... The torsion spring 33 rotates under the reset action, and the agitator 34 swings in the opposite direction, producing a stirring and flipping effect on the frozen food. At the same time, when the rotating rod 30 moves to the vertical surface of the extrusion block 27, it will fall and hit the elastic band 29 in the groove 28, causing the elastic band 29 to undergo elastic deformation and drive the rotating rod 30 and the conveyor belt 24 to vibrate, causing the frozen food to vibrate and roll continuously during the conveying process, so that the hot water and hot air can come into full contact with the surface and interior of the food. After thawing, the frozen food is automatically discharged from the discharge hopper 8 at the right end of the device box 1.

[0030] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for rapid defrosting of frozen food, comprising a device box (1) and a box cover (9) disposed on the top of the device box (1), characterized in that, Also includes: A conveyor belt (24) is horizontally arranged inside the device box (1), and a material feeding component is arranged on the belt surface of the conveyor belt (24); Two vibration components are respectively set on the inner walls of opposite sides of the device box (1). By rotating the conveyor belt (24), the feeding component is driven to move along the vibration component. The vibration component can drive the feeding component to perform actions. The feeding component, which moves and moves with the conveyor belt (24), vibrates and moves the food during the process of conveying the food by the conveyor belt (24). A thawing water spray circulation assembly is disposed on one side of the device box (1) and extends into the interior of the device box (1); An exhaust assembly is disposed at the upper end of the box cover (9); A heat exchange assembly is disposed at the upper end of the box cover (9), and the heat exchange assembly is connected to the exhaust assembly; A hot air assembly is disposed on the device housing (1), the hot air assembly extends into the interior of the device housing (1), and the hot air assembly is connected to the heat exchange assembly.

2. The rapid thawing device for quick-frozen food according to claim 1, characterized in that, The material feeding assembly includes a mounting frame (25) fixedly embedded on the surface of the conveyor belt (24). A rotating rod (30) is provided above the mounting frame (25). The two ends of the rotating rod (30) pass through the two side walls of the mounting frame (25) respectively, and the rotating rod (30) is rotatably connected to the mounting frame (25). Two torsion springs (33) are fitted on the rotating rod (30). The two torsion springs (33) are respectively set on the two sides of the mounting frame (25). One end of the torsion spring (33) is fixed on the side wall of the mounting frame (25), and the other end of the torsion spring (33) is fixed on the side wall of the rotating rod (30). Flat grooves (31) are provided on the lower side walls of both ends of the rotating rod (30). Guide grooves (32) are provided on the side of the flat grooves (31). A feeding frame (34) is fixedly sleeved on the side wall of the rotating rod (30).

3. The rapid thawing device for quick-frozen food according to claim 2, characterized in that, The vibration assembly includes a support guide plate (26) fixed on the inner wall of the device box (1). Multiple extrusion blocks (27) are fixed on the upper surface of the support guide plate (26). Multiple grooves (28) are provided on the upper surface of the support guide plate (26). The extrusion blocks (27) and the grooves (28) are spaced apart, and the grooves (28) are located on one side of the extrusion blocks (27). An elastic band (29) is provided inside the groove (28). Both ends of the elastic band (29) are fixed on the inner wall of the groove (28).

4. The rapid thawing device for quick-frozen food according to claim 1, characterized in that, The defrosting water spray circulation assembly includes a circulating hot water tank (5) and a pump (4) located outside the device box (1). The input end of the pump (4) is connected to the circulating hot water tank (5). A water supply pipe (3) is fixed on the inner wall of the device box (1). A spray pipe (20) located above the conveyor belt (24) is arranged and connected on the side wall of the water supply pipe (3). The end of the water supply pipe (3) away from the spray pipe (20) passes through the device box (1) and is connected to the output end of the pump (4). A water collection hopper (19) is fixed on the inner wall of the device box (1). The water collection hopper (19) is located below the upper conveyor belt (24). A return water pipe (6) is connected to the side wall of the water collection hopper (19). The end of the return water pipe (6) away from the water collection hopper (19) passes through the device box (1) and is connected to the side wall of the circulating hot water tank (5).

5. The rapid thawing device for quick-frozen food according to claim 1, characterized in that, The exhaust assembly includes an exhaust fan (13) installed on the upper end of the cover (9). The input end of the exhaust fan (13) is connected to an exhaust pipe (14). The end of the exhaust pipe (14) away from the exhaust fan (13) is connected to the upper end of the cover (9), and the exhaust pipe (14) communicates with the interior of the device box (1). The output end of the exhaust fan (13) is connected to a vent pipe (12).

6. The rapid thawing device for quick-frozen food according to claim 1, characterized in that, The heat exchange assembly includes a heat exchange cylinder (10) installed on the upper end of the cover (9). A column (22) is provided in the center of the heat exchange cylinder (10). The two ends of the column (22) are fixed on the inner top wall and the inner bottom wall of the heat exchange cylinder (10), respectively. A hollow spiral heat exchange plate (21) is fixedly connected between the inner wall of the heat exchange cylinder (10) and the column (22). The end of the vent pipe (12) away from the exhaust fan (13) passes through the heat exchange cylinder (10) and is connected to the hollow spiral heat exchange plate (21). The vent pipe (12) is connected to the upper end of the hollow spiral heat exchange plate (21). An exhaust pipe (11) is provided through the side wall of the heat exchange cylinder (10). The exhaust pipe (11) is connected to the lower end of the hollow spiral heat exchange plate (21).

7. The rapid thawing device for quick-frozen food according to claim 1, characterized in that, The hot air assembly includes a hot air blower (16) installed on the outer wall of the device box (1), a blower hood (17) installed on the inner wall of the device box (1), the blower hood (17) penetrating the device box (1) and connected to the output end of the hot air blower (16), an air outlet pipe (15) communicating with the inside of the heat exchange cylinder (10) is connected to the upper part of the side wall of the heat exchange cylinder (10), the end of the air outlet pipe (15) away from the heat exchange cylinder (10) is connected to the input end of the hot air blower (16), and an air inlet pipe (18) communicating with the inside of the heat exchange cylinder (10) is connected to the lower part of the side wall of the heat exchange cylinder (10).

8. The rapid thawing device for quick-frozen food according to claim 1, characterized in that, The device box (1) has two horizontally arranged belt rollers (23). Both ends of the belt rollers (23) are rotatably mounted on the inner wall of the device box (1). The conveyor belt (24) is fitted on the two belt rollers (23). The device box (1) has an electric motor (7) installed on the outer wall. The output shaft of the electric motor (7) passes through the device box (1) and is fixed to the end of one of the belt rollers (23).

9. A rapid thawing device for quick-frozen food according to claim 1, characterized in that, The upper left side of the box cover (9) is provided with a feed hopper (2) fixed to the box cover (9), and the right side wall of the device box (1) is provided with a discharge hopper (8) fixed to the device box (1), and the discharge hopper (8) is located below the conveyor belt (24).

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