Single body quick freezing equipment

Abstract

The utility model discloses single-body quick freezing equipment which comprises a shell, a conveying belt is installed in the shell, a transmission wheel is attached to the inner wall of the conveying belt, the single-body quick freezing equipment further comprises a freezing structure, and the freezing structure is installed at the top of the inner wall of the shell. The turnover device is arranged above the conveying belt; the recovery device is mounted at the bottom of the shell; the food is quickly frozen through the freezing structure, and the food is overturned through the overturning device. The utility model relates to the technical field of quick freezing equipment, through the cooperation of a spray pipe, a connecting pipe and a liquid nitrogen pump, food is placed on a conveying belt, the input end of the liquid nitrogen pump is connected to the liquid nitrogen pipe, liquid nitrogen in a liquid nitrogen tank is conveyed into the spray pipe through the connecting pipe by the liquid nitrogen pump, and then the liquid nitrogen is sprayed out through the spray pipe, so that the food on the conveying belt is quickly frozen. Therefore, single-body quick freezing of the food in a short time is realized.

Description

A single-unit rapid freezing device Technical Field

[0001] This utility model relates to the field of rapid freezing equipment technology, specifically a single-unit rapid freezing device. Background Technology

[0002] Quick-frozen foods are processed through rapid freezing at low temperatures and stored and transported at temperatures below -18°C. This process prevents the loss of moisture and juices from the food's tissues, and microorganisms do not multiply at low temperatures, thus effectively ensuring food safety. Generally, ice crystals formed during freezing are the main factor affecting the quality of frozen foods. Quick-frozen foods require the food to pass through the largest ice crystal zone (most foods are between -1 and -5°C) as quickly as possible during freezing, with the final freezing temperature below -18°C. Rapid freezing equipment is a key piece of equipment in the production of quick-frozen foods, and its performance determines the level of industrialization and product quality of quick-frozen foods.

[0003] In existing technology, food is placed on a shelf, and a refrigeration device cools the gas. A cold air blower then blows the cooled gas onto the food on the shelf to achieve rapid freezing.

[0004] However, in the existing technology, relying on cold air as the cooling medium, and with the corresponding air cooler and refrigeration system, the equipment cost is high, the power configuration is large, the energy consumption is high, and it is difficult to guarantee the required freezing speed and uniformity of food. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a single-unit rapid freezing device, which solves the problems of high equipment cost, large power configuration, high energy consumption, and difficulty in ensuring the required freezing speed and uniformity of food in existing technologies that rely on cold air as the cooling medium and are equipped with corresponding cold air blowers and refrigeration systems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a single-unit rapid freezing device, comprising a housing, a conveyor belt installed inside the housing, a drive wheel attached to the inner wall of the conveyor belt, and a freezing structure installed on the top of the inner wall of the housing; a turning device disposed above the conveyor belt; and a recovery device installed at the bottom of the housing; wherein, the freezing structure rapidly freezes the food, the turning device turns the food over, and the recovery device recovers the gas generated inside the housing.

[0007] Preferably, the refrigeration structure includes a nozzle positioned above the conveyor belt and fixedly connected to the inner wall of the housing; a connecting pipe communicating with the top of the nozzle and extending to the top of the housing; a liquid nitrogen pump delivery end communicating with one end of the connecting pipe extending to the top of the housing; a bracket fixedly connected to the bottom of the liquid nitrogen pump and fixedly connected to the top of the housing; and a valve installed between the liquid nitrogen pump and the connecting pipe; wherein, through the cooperation of the valve and the connecting pipe, the liquid nitrogen pump sprays liquid nitrogen through the nozzle, and the bracket supports the liquid nitrogen pump.

[0008] Preferably, the flipping device includes a first limiting wheel, which is located on the side away from the drive wheel and is attached to the inner wall of the conveyor belt, and its outer wall is rotatably connected to the inner wall of the housing via a bearing; a second limiting wheel is located on the side close to the drive wheel and is attached to the outer wall of the conveyor belt, and its outer wall is rotatably connected to the outer wall of the housing via a bearing; wherein, the cooperation of the first limiting wheel and the second limiting wheel causes the conveyor belt to flip the food.

[0009] Preferably, the recovery device includes a suction pump, which is fixedly connected to the bottom of the housing and has its input end connected to the bottom of the housing; a three-way valve is connected to the output end of the suction pump; a nozzle is fixedly connected to the inner wall of the housing and has one end of a connecting pipe extending to the outside of the housing connected to one end of the three-way valve; wherein, through the cooperation of the suction pump and the three-way valve, the nozzle blows cold air into the housing.

[0010] Preferably, the inner wall of the conveyor belt is fitted with several support wheels, and the outer wall of each support wheel is fitted with a fixing frame, the outer wall of the fixing frame being fixedly connected to the inner wall of the housing.

[0011] Beneficial effects

[0012] This invention provides a device for rapid freezing of individual food items. It offers the following advantages: The device uses a spray nozzle, connecting pipe, and liquid nitrogen pump to place food items on a conveyor belt. The input end of the liquid nitrogen pump is connected to a liquid nitrogen pipe. The liquid nitrogen pump delivers liquid nitrogen from the liquid nitrogen tank to the spray nozzle through the connecting pipe, and then sprays it out, rapidly freezing the food items on the conveyor belt. This achieves rapid freezing of individual food items within a short time.

[0013] Through the cooperation of a suction pump, a three-way valve, and a nozzle, when liquid nitrogen comes into contact with food, the liquid nitrogen will rapidly vaporize, lowering the temperature of the food and freezing it. The generated nitrogen gas will accumulate at the bottom of the shell. The suction pump will suck out the gas from the bottom of the shell, and the temperature sensor will detect the gas and ensure its stability. When the temperature is below 20 degrees Celsius, the three-way valve will be opened on the side leading to the nozzle, allowing the cold gas to flow back into the shell. In this way, the temperature inside the shell will be kept at a stable low temperature, thus saving energy. Conversely, when the temperature is too high, the other side of the three-way valve will be opened to release the gas. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the structure of this utility model;

[0015] Figure 2 is a three-dimensional structural diagram of this utility model;

[0016] Figure 3 is a three-dimensional structural diagram of the nozzle and connecting pipe in Figure 1;

[0017] Figure 4 is a schematic diagram of the liquid nitrogen pump, nozzle and housing in Figure 1;

[0018] Figure 5 is a schematic diagram of the conveyor belt, the second limiting wheel, and the support wheel in Figure 1.

[0019] In the diagram: 1. Shell; 11. Conveyor belt; 12. Drive wheel; 13. Support wheel; 14. Fixing frame; 2. Refrigeration structure; 21. Nozzle; 22. Connecting pipe; 23. Liquid nitrogen pump; 24. Bracket; 25. Valve; 3. Tilting device; 31. First limiting wheel; 32. Second limiting wheel; 4. Recovery device; 41. Suction pump; 42. Three-way valve; 43. Nozzle. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In existing technologies, cold air is used as the cooling medium, along with corresponding air coolers and refrigeration systems. This results in high equipment costs, large power requirements, high energy consumption, and difficulty in ensuring the required freezing speed and uniformity of food.

[0022] In view of this, the present invention provides a single-unit rapid freezing device, which solves the problems of high equipment cost, large power configuration, high energy consumption, and difficulty in ensuring the freezing speed and uniformity of food in the prior art, which relies on cold air as the cooling medium and is equipped with corresponding cold air blowers and refrigeration systems.

[0023] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0024] Example 1: As shown in Figures 1-5, a single-unit rapid freezing device includes a housing 1, a conveyor belt 11 installed inside the housing 1, and a drive wheel 12 attached to the inner wall of the conveyor belt 11. The single-unit rapid freezing device also includes a freezing structure 2, a turning device 3, and a recovery device 4. The freezing structure 2 is installed on the top of the inner wall of the housing 1; the turning device 3 is located above the conveyor belt 11; and the recovery device 4 is installed at the bottom of the housing 1. The freezing structure 2 rapidly freezes the food, the turning device 3 turns the food over, and the recovery device 4 recovers the gas generated inside the housing 1.

[0025] In the specific implementation process, it is worth noting that the conveyor belt 11 is mesh-like, which reduces the contact area between the conveyor belt 11 and the food, allowing it to move normally even at low temperatures. The outer wall of the drive wheel 12 has protrusions, which increases the friction between the drive wheel 12 and the conveyor belt 11, thus stabilizing the movement of the conveyor belt 11 when the drive wheel 12 drives it. A drive motor is installed on the outer wall of the drive wheel 12. The freezing structure 2 enables the food to freeze quickly, and the flipping device 3 flips the food to prevent the bottom from not contacting the liquid nitrogen, which would cause uneven freezing. The recovery device 4 can recover the nitrogen gas generated by the vaporization of liquid nitrogen and reuse it after treatment. It is worth mentioning that this device can quickly absorb the heat from the food when it comes into contact with it, causing the food temperature to drop sharply, thereby achieving rapid freezing.

[0026] Furthermore, the refrigeration structure 2 includes a nozzle 21, a connecting pipe 22, a liquid nitrogen pump 23, a bracket 24, and a valve 25. The nozzle 21 is positioned above the conveyor belt 11 and is fixedly connected to the inner wall of the housing 1. The connecting pipe 22 connects to the top of the nozzle 21 and extends to the top of the housing 1. The delivery end of the liquid nitrogen pump 23 is connected to the end of the connecting pipe 22 that extends to the top of the housing 1. The bracket 24 is fixedly connected to the bottom of the liquid nitrogen pump 23 and to the top of the housing 1. The valve 25 is installed between the liquid nitrogen pump 23 and the connecting pipe 22. Through the cooperation of the valve 25 and the connecting pipe 22, the liquid nitrogen pump 23 sprays liquid nitrogen through the nozzle 21. The bracket 24 supports the liquid nitrogen pump 23. The model of the liquid nitrogen pump 23 is not limited, as long as it meets the actual use requirements. The valve 25 should be a low-temperature resistant valve to prevent damage to the valve 25 when liquid nitrogen passes through.

[0027] In the specific implementation process, it is worth noting that the input end of the liquid nitrogen pump 23 is connected to the liquid nitrogen tank, so that the liquid nitrogen pump 23 directly draws out the liquid nitrogen in the tank. The nozzle 21 is U-shaped with its opening facing downwards, ensuring that the food moves in the middle of its inner side when it is moved. In this way, the liquid nitrogen sprayed by the nozzle 21 can contact the food more evenly and freeze it. Furthermore, two nozzles 21 are set at the front and back inside the shell 1. After freezing at the front, the bottom of the food is exposed after the flipping device 3 flips the food over. The nozzle 21 at the rear will spray liquid nitrogen again, which ensures that all the food comes into contact with liquid nitrogen and achieves rapid freezing of individual food items.

[0028] Furthermore, the flipping device 3 includes a first limiting wheel 31 and a second limiting wheel 32. The first limiting wheel 31 is located on the side away from the drive wheel 12 and is attached to the inner wall of the conveyor belt 11, and its outer wall is rotatably connected to the inner wall of the housing 1 through a bearing. The second limiting wheel 32 is located on the side close to the drive wheel 12 and is attached to the outer wall of the conveyor belt 11, and its outer wall is rotatably connected to the outer wall of the housing 1 through a bearing. The cooperation of the first limiting wheel 31 and the second limiting wheel 32 causes the conveyor belt 11 to flip the food.

[0029] In the specific implementation process, it is worth noting that the first limiting wheel 31 and the second limiting wheel 32 are placed in an alternating vertical arrangement, and the outer wall of the conveyor belt 11 is made higher on the side near the feed inlet and lower on the side near the discharge outlet by the action of the first limiting wheel 31 and the second limiting wheel 32, so that the conveyor belt 11 presents a certain drop. In this way, when the front part of the food moves to the end of the upper conveyor belt 11, its head will tilt downward under the action of gravity. When the food moves to the end on the conveyor belt 11, it will cause the food to flip over, so that every aspect of the food can come into contact with liquid nitrogen.

[0030] Specifically, when using this individual rapid freezing equipment, the food is placed on the conveyor belt 11 with a certain distance between them to prevent sticking during freezing. As the conveyor belt 11 moves the food, the liquid nitrogen pump 23 directly draws out the liquid nitrogen from the tank and delivers it through the connecting pipe 22 to the nozzle 21, where it is sprayed out to contact the food and rapidly freeze it. When the front of the food moves to the end of the upper conveyor belt 11, its head tilts downwards under the influence of gravity. After the food moves to the end of the conveyor belt 11, it flips over, ensuring that every part of the food comes into contact with the liquid nitrogen, achieving individual rapid freezing. The gas generated after freezing is converted into gas and recovered by the recovery device 4. After further processing, it is recycled into liquid nitrogen for reuse.

[0031] Example 2: As shown in Figures 1-5, the recycling device 4 includes a suction pump 41, a three-way valve 42, and a nozzle 43. The suction pump 41 is fixedly connected to the bottom of the housing 1, and its input end is connected to the bottom of the housing 1. The three-way valve 42 is connected to the output end of the suction pump 41. The nozzle 43 is fixedly connected to the inner wall of the housing 1, and one end of the nozzle 43 extends to the outside of the housing 1 through a connecting pipe and is connected to one end of the three-way valve 42. The suction pump 41 and the three-way valve 42 work together to blow cold air into the housing 1 through the nozzle 43. The model of the suction pump 41 is not limited, as long as it meets the actual use requirements.

[0032] In the specific implementation process, it is worth noting that when liquid nitrogen comes into contact with food, the liquid nitrogen will quickly vaporize, lowering the temperature of the food and freezing it. The generated nitrogen gas will accumulate at the bottom of the shell 1. The gas at the bottom of the shell 1 is sucked out by the suction pump 41, and the temperature sensor detects the gas to ensure its stability. When the temperature is below 20 degrees, the three-way valve 42 is opened to the nozzle 43, allowing the cold air to flow back into the shell 1. In this way, the temperature inside the shell 1 will be kept at a stable low temperature, thereby saving energy. Conversely, when the temperature is too high, the other side of the three-way valve 42 is opened to discharge the gas or connect it to other pipelines for recycling or utilization.

[0033] Furthermore, a number of support wheels 13 are attached to the inner wall of the conveyor belt 11, and a fixing frame 14 is installed on the outer wall of each of the support wheels 13. The outer wall of the fixing frame 14 is fixedly connected to the inner wall of the housing 1.

[0034] In the specific implementation process, it is worth noting that the support wheel 13 is fixed by the fixing frame 14 to ensure that each support wheel 13 can be tightly attached to the bottom of the conveyor belt 11, which makes it convenient when the conveyor belt 11 transports food.

[0035] Specifically, based on the above embodiments, when the drive wheel 12 drives the conveyor belt 11 to move, the support wheel 13 can ensure the tension of the conveyor belt 11 is stable, so that the conveyor belt 11 can be in stable contact with the drive wheel 12, avoiding the reduction of the transmission effect between the drive wheel 12 and the conveyor belt 11 when the drive wheel 12 rotates. Under the action of the recovery device 4, the bottom gas in the shell 1 is recovered and treated, which can reduce costs and also avoid the danger caused by nitrogen leakage.

[0036] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A single-unit rapid freezing device, comprising a housing (1), characterized in that: The housing (1) is equipped with a conveyor belt (11) inside, and a drive wheel (12) is attached to the inner wall of the conveyor belt (11). The single-unit rapid freezing device also includes: a freezing structure (2) installed on the top of the inner wall of the housing (1); a flipping device (3) set above the conveyor belt (11); and a recovery device (4) installed at the bottom of the housing (1). The food is rapidly frozen by the freezing structure (2), the flipping device (3) flips the food, and the recovery device (4) recovers the gas generated inside the housing (1).

2. The single-unit rapid freezing device according to claim 1, characterized in that: The freezing structure (2) includes: a nozzle (21) disposed above the conveyor belt (11) and fixedly connected to the inner wall of the housing (1); a connecting pipe (22) connected to the top of the nozzle (21) and extending to the top of the housing (1); a liquid nitrogen pump (23) with its delivery end connected to one end of the connecting pipe (22) extending to the top of the housing (1); a bracket (24) fixedly connected to the bottom of the liquid nitrogen pump (23) and fixedly connected to the top of the housing (1); and a valve (25) installed between the liquid nitrogen pump (23) and the connecting pipe (22). The liquid nitrogen pump (23) sprays liquid nitrogen through the nozzle (21) by the cooperation of the valve (25) and the connecting pipe (22), and the bracket (24) supports the liquid nitrogen pump (23).

3. The single-unit rapid freezing device according to claim 1, characterized in that: The flipping device (3) includes: a first limiting wheel (31), which is located on the side away from the transmission wheel (12) and is attached to the inner wall of the conveyor belt (11), and its outer wall is rotatably connected to the inner wall of the housing (1) through a bearing; a second limiting wheel (32), which is located on the side close to the transmission wheel (12) and is attached to the outer wall of the conveyor belt (11), and its outer wall is rotatably connected to the outer wall of the housing (1) through a bearing; wherein, through the cooperation of the first limiting wheel (31) and the second limiting wheel (32), the conveyor belt (11) drives the food to flip.

4. The single-unit rapid freezing device according to claim 1, characterized in that: The recycling device (4) includes: a suction pump (41), which is fixedly connected to the bottom of the housing (1) and whose input end is connected to the bottom of the housing (1); a three-way valve (42), which is connected to the output end of the suction pump (41); and a nozzle (43), which is fixedly connected to the inner wall of the housing (1) and whose end extends to the outside of the housing (1) through a connecting pipe and is connected to one end of the three-way valve (42); wherein, through the cooperation of the suction pump (41) and the three-way valve (42), the nozzle (43) blows cold air into the housing (1).

5. The single-unit rapid freezing device according to claim 1, characterized in that: The inner wall of the conveyor belt (11) is fitted with a number of support wheels (13), and the outer wall of each of the support wheels (13) is fitted with a fixing frame (14), and the outer wall of the fixing frame (14) is fixedly connected to the inner wall of the housing (1).

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