quick freezer

Abstract

The application provides a quick freezer, which comprises a shell, a conveying belt, a first air cooling cavity, a water cooling cavity and a second air cooling cavity which are sequentially communicated in the conveying direction of the conveying belt, and air cooling structures arranged in the first air cooling cavity and the second air cooling cavity, and a water cooling structure arranged in the water cooling cavity. The quick freezer provided by the application realizes three times of quick freezing of the frozen goods by sequentially passing through the first air cooling cavity, the water cooling cavity and the second air cooling cavity in the conveying direction of the conveying belt. The water cooling structure arranged in the water cooling cavity can make the frozen goods contact with cold water, and the cold water can quickly freeze the frozen goods compared with air, so that the frozen goods can be deeply frozen, and the problem of low quick freezing efficiency in the prior art is solved, and the quick freezing efficiency is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of quick-freezing equipment technology, and in particular to a quick-freezing machine. Background Technology

[0002] With the continuous improvement of living standards, the output of frozen fruits and vegetables is increasing, and the corresponding quick-freezing equipment is also becoming more and more common, such as tunnel-type quick-freezing machines, which are mainly used for freezing high-value-added foods in large production volumes, such as lychees. Traditional tunnel-type quick-freezing machines are air-cooled, blowing cold air onto the items to be frozen to achieve the freezing effect. However, air has a low specific heat capacity, limiting the speed and efficiency of freezing fruits and vegetables. Therefore, they are not suitable for quick-freezing fruits and vegetables with high latent heat values. Taking lychees as an example, lychees contain a large amount of water. When traditional air-cooled quick-freezing machines cool lychees, the temperature of the lychees gradually decreases, and the water inside will form ice crystals as the temperature slowly decreases. Eventually, the ice crystals become too large, causing the lychees to break and the quality of the lychees to fail to meet requirements. Therefore, existing air-cooled quick-freezing machines have the problem of poor quick-freezing effect. Summary of the Invention

[0003] In order to solve the technical problem of poor quick-freezing effect in the existing air-cooled quick-freezing technology, a quick-freezing machine is provided that performs a three-stage cooling process of air cooling, water cooling and secondary air cooling on the items to be frozen, and uses water cooling to accelerate the quick-freezing efficiency, so as to improve the quick-freezing effect and quick-freezing efficiency.

[0004] A quick-freezing machine, comprising:

[0005] case;

[0006] A conveyor belt, at least a portion of which is disposed within the housing;

[0007] Along the conveying direction of the conveyor belt, the interior of the housing includes a first air-cooled cavity, a water-cooled cavity, and a second air-cooled cavity connected in sequence.

[0008] Both the first air-cooled cavity and the second air-cooled cavity are equipped with air-cooling structures;

[0009] The water-cooled cavity is equipped with a water-cooling structure.

[0010] The water-cooling structure includes a first spraying mechanism, which is disposed inside the housing and located above the conveyor belt, with the spraying direction of the first spraying mechanism facing the conveyor belt.

[0011] The quick-freezing machine also includes a first refrigeration structure and a water receiving tray. Both the first refrigeration structure and the water receiving tray are disposed inside the housing, and the water receiving tray is located below the first refrigeration structure. The inlet of the first spray mechanism is connected to the water receiving tray.

[0012] The quick-freezing machine also includes a water supply structure, which is disposed on the housing and the outlet of the water supply structure faces the first refrigeration structure.

[0013] The water supply structure includes a second spray mechanism, which is disposed inside the housing. The second spray mechanism is located above the first refrigeration structure, and the spraying direction of the second spray mechanism is towards the first refrigeration structure.

[0014] The quick-freezing machine also includes a second refrigeration structure, which is disposed within the water receiving tray.

[0015] The water-cooling structure includes a water collection tank, which is disposed inside the housing and located below the first spraying mechanism.

[0016] Part of the conveyor belt is located below the liquid surface of the water collection tank.

[0017] The quick-freezing machine also includes a circulation mechanism, the inlet of which is connected to the water collection tank, and the outlet of which is connected to the water supply structure.

[0018] The air-cooled structure includes a fan, which is disposed between the first refrigeration structure and the conveyor belt, and the fan's air outlet direction is towards the conveyor belt.

[0019] The air-cooled structure also includes a ventilation baffle, which is disposed between the fan and the conveyor belt, and the ventilation baffle is provided with air passage holes.

[0020] The ventilation baffle includes a first ventilation plate and a second ventilation plate. The first ventilation plate is disposed in the first air-cooling cavity, and the second ventilation plate is disposed in the second air-cooling cavity. The flow area of ​​the air passage holes on the first ventilation plate is smaller than the flow area of ​​the air passage holes on the second ventilation plate.

[0021] The conveyor belt is provided with grid holes.

[0022] The quick-freezing machine provided by this invention has a first air-cooled chamber, a water-cooled chamber, and a second air-cooled chamber interconnected inside the casing. A conveyor belt carries the items to be frozen through these chambers sequentially, achieving three-stage quick-freezing. The water-cooled chamber's water-cooling structure allows the items to come into contact with cold water. Since water has a higher specific heat capacity than air, the cold water can freeze the items much faster than air, achieving deep freezing and avoiding the problem of low quick-freezing efficiency and damage to the items in existing technologies, thus effectively improving quick-freezing efficiency. Furthermore, the cold water in the water-cooled structure can be used to clean the items, removing impurities and surface residues, improving their cleanliness. Downstream of the water-cooled chamber is a second air-cooled chamber, whose air-cooling structure can blow out residual cold water from the items, facilitating subsequent packaging and improving the quality of the frozen items. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a quick-freezing machine provided in an embodiment of the present invention;

[0024] Figure 2 This is a cross-sectional view of a quick-freezing machine provided in an embodiment of the present invention;

[0025] Figure 3 for Figure 2 A partial schematic diagram of point A;

[0026] Figure 4 This is another cross-sectional view of the quick-freezing machine provided in an embodiment of the present invention;

[0027] Figure 5 This is another cross-sectional view of the quick-freezing machine provided in an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the water flow path of a quick-freezing machine provided in an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the airflow path of a quick-freezing machine provided in an embodiment of the present invention;

[0030] In the picture:

[0031] 1. Shell; 2. Conveyor belt; 11. First air-cooled cavity; 12. Water-cooled cavity; 13. Second air-cooled cavity; 3. Air-cooled structure; 4. Water-cooled structure; 41. First spray mechanism; 51. First refrigeration structure; 52. Water receiving tray; 53. Water supply structure; 54. Second refrigeration structure; 55. Defrosting water tank; 42. Water collection trough; 6. Circulation mechanism; 31. Fan; 32. First ventilation plate; 33. Second ventilation plate; 61. Circulating water tank; 62. Water pump; 63. Circulating water pipe. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention 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 for illustrative purposes only and are not intended to limit the invention.

[0033] To enable those skilled in the art to better understand the present invention, 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate for the embodiments of the invention described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0035] It should be noted that in the description of this invention, terms such as "upper," "lower," "left," "right," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] Traditional tunnel-type quick-freezing machines are air-cooled, blowing cold air onto the items to be frozen to achieve the freezing effect. However, air has a low specific heat capacity, limiting the speed and efficiency of freezing fruits and vegetables. Therefore, they are not suitable for quick-freezing fruits and vegetables with high latent heat values. Due to the use of air-cooled convection heat exchange, moisture inside the product will be released and ice crystals will sublimate on the surface during the freezing process, resulting in moisture loss. The generally poor quality of frozen products is due to two main reasons: firstly, the long freezing time leads to the formation of large ice crystals inside the product, which can pierce the cell walls and affect the quality; secondly, the surface moisture during freezing binds the product together into a single ice mass, resulting in a long thawing time during secondary processing. Prolonged thawing increases the likelihood of microbial growth, further affecting the quality. Taking lychee as an example, lychees contain a large amount of water. When traditional air-cooled quick-freezing machines cool lychees, the temperature gradually decreases. As the temperature slowly drops, the internal water crystals form ice crystals. Eventually, if the ice crystals become too large, they will break through the lychee's skin, causing damage and resulting in the lychee failing to meet quality requirements. Therefore, this application provides a method... Figures 1 to 7 The quick-freezing machine shown includes: a housing 1; a conveyor belt 2, at least a portion of which is disposed within the housing 1; along the conveying direction of the conveyor belt 2, the housing 1 includes a first air-cooled cavity 11, a water-cooled cavity 12, and a second air-cooled cavity 13 connected in sequence; both the first air-cooled cavity 11 and the second air-cooled cavity 13 are provided with air-cooling structures 3; and the water-cooled cavity 12 is provided with a water-cooling structure 4. The interconnected first air-cooled cavity 11, water-cooled cavity 12, and second air-cooled cavity 13 are disposed within the housing 1, and the conveyor belt 2 carries the items to be frozen through them sequentially, thereby achieving three-stage quick-freezing of the items. Furthermore, the water-cooling structure 4 in the water-cooled cavity 12 allows the items to come into contact with cold water. Since the specific heat capacity of water is higher than that of air, the cold water can quickly freeze the items relative to air, achieving deep freezing of the items and avoiding the problem of low quick-freezing efficiency and damage to the items in the prior art, effectively improving quick-freezing efficiency. Furthermore, the cold water in the water-cooling structure 4 can be used to clean the items to be frozen, removing impurities and surface residues, thus improving the cleanliness of the items. Also, since a second air-cooling chamber 13 is provided downstream of the water-cooling chamber 12, the air-cooling structure 3 in the second air-cooling chamber 13 can blow out the residual cold water on the items to be frozen, which facilitates subsequent packaging and improves the quality of the items to be frozen.

[0038] In one embodiment, the water-cooled structure 4 includes a first spray mechanism 41, which is disposed within the housing 1 and located above the conveyor belt 2, with its spray direction facing the conveyor belt 2. The first spray mechanism 41 sprays cold water onto the items to be frozen on the conveyor belt 2, allowing the cold water to directly contact and exchange heat with the items. The high specific heat capacity of the water enables rapid freezing of the items, overcoming the low freezing efficiency problem of air with low specific heat capacity in existing technologies, and effectively improving the speed and efficiency of the freezer. Furthermore, the cold water sprayed by the spray mechanism has a certain kinetic energy, which can wash away impurities and surface residues on the items, improving their cleanliness and quality.

[0039] The quick-freezing machine also includes a first refrigeration structure 51 and a water collection tray 52. ​​Both the first refrigeration structure 51 and the water collection tray 52 are disposed inside the housing 1, with the water collection tray 52 located below the first refrigeration structure 51. The inlet of the first spray mechanism 41 is connected to the water collection tray 52. ​​The first refrigeration structure 51 can provide cooling to the interior of the housing 1, thereby achieving quick-freezing of items to be frozen that enter the housing 1. Since the air inside the housing 1 and the items to be frozen that enter the housing 1 contain water vapor, condensation will form on the first refrigeration structure 51 when the water vapor comes into contact with it. Therefore, the water collection tray 52 is provided to collect the condensation, and the first spray mechanism 41 is used to utilize this condensation, which can improve the quick-freezing effect of the items to be frozen and reduce the production cost of the quick-freezing machine.

[0040] Because the temperature of the first refrigeration structure 51 is low, frost may form on it after prolonged operation. To address this, the quick-freezing machine also includes a water supply structure 53, which is installed on the housing 1 with its outlet facing the first refrigeration structure 51. The water supply structure 53 supplies water to the first refrigeration structure 51 for defrosting, thereby melting the frost on the first refrigeration structure 51 and improving its heat exchange efficiency. The water used to melt the frost on the first refrigeration structure 51 forms defrosting water, which is collected by the water receiving tray 52 and supplied to the first spraying mechanism 41 to spray the items to be frozen. The defrosting water is relatively cold and can directly meet the purpose of quick-freezing the items, thus fully utilizing the cooling capacity of the first refrigeration structure 51 and improving the energy efficiency of the quick-freezing machine. Since the first refrigeration structure 51 needs to cool the entire interior of the housing 1, that is, simultaneously supplying cooling to the first air-cooled cavity 11, the water-cooled cavity 12, and the second air-cooled cavity 13, the first refrigeration structure 51 will penetrate through the above three chambers. Therefore, the first refrigeration structure 51 is relatively large. To enable the water source provided by the water supply structure 53 to defrost the entire first refrigeration structure 51, the water supply structure 53 includes a second spray mechanism. The second spray mechanism is located inside the housing 1, above the first refrigeration structure 51, and its spray direction is towards the first refrigeration structure 51. The second spray mechanism guides and sprays the water supplied by the water supply structure 53 to the first refrigeration structure 51. The second spray mechanism can be arranged along the length of the water supply structure 53, thereby spraying and defrosting the entire first refrigeration structure 51. Simultaneously, the water sprayed by the second spray mechanism has a certain kinetic energy, which can flush the first refrigeration structure 51, thereby improving the defrosting effect and ensuring the heat exchange efficiency of the first refrigeration structure 51.

[0041] To ensure the water temperature in the drip tray 52 is sufficient for quick-freezing the items, the quick-freezing machine also includes a second refrigeration structure 54, which is located within the drip tray 52. ​​The second refrigeration structure 54 cools the water in the drip tray 52, and the cooled water is then transported to the first spray mechanism 41, ensuring that the water sprayed by the first spray mechanism 41 can quickly freeze the items. Specifically, the first refrigeration structure 51 is an evaporator, including heat exchange tubes and fins. Part of the heat exchange tubes are located within the drip tray 52 to form the second refrigeration structure 54. An on / off structure is provided on the heat exchange tubes in the drip tray 52, which can be controlled according to the water temperature in the drip tray 52 to ensure the reliability of the water temperature. For example, when the water temperature in the drip tray 52 is higher than 3°C, the second refrigeration structure 54 (i.e., the heat exchange tube located in the drip tray 52) is activated to cool the water in the drip tray 52, ensuring that the water temperature in the drip tray 52 is between 0°C and 3°C, thus ensuring the rapid freezing effect of the items to be frozen. Since the drip tray 52 has a small volume, a defrost water tank 55 can be installed below the drip tray 52. ​​The defrost water tank 55 collects defrost water and condensate, and supplies water to the first spray mechanism 41. In this case, the second refrigeration structure 54 is located inside the defrost water tank 55.

[0042] The defrost water tank 55 is equipped with a temperature detection mechanism and a water level detection mechanism. The temperature detection mechanism can detect the water temperature in the defrost water tank 55 and control the operation of the second refrigeration structure 54 based on this water temperature. The water level detection mechanism can detect the water level in the defrost water tank 55 and determine whether the water level in the defrost water tank 55 has reached a preset value. When the water level reaches the preset value, it indicates that the first spray mechanism 41 can work normally and can be turned on for spray quick freezing.

[0043] The water-cooling structure 4 includes a water collection tank 42, which is disposed inside the housing 1 and located below the first spraying mechanism 41. The water collection tank 42 can collect water sprayed by the first spraying mechanism 41 and water dripping from the items to be frozen, preventing water from flowing into or even outside the housing 1 and causing leakage in the quick-freezing machine, thus ensuring the reliable operation of the quick-freezing machine.

[0044] Furthermore, a portion of the conveyor belt 2 is located below the liquid surface of the water collection tank 42. In this case, the conveyor belt 2 can carry the items to be frozen into the water collection tank 42, thereby achieving a water bath for the items. This improves the quick-freezing effect, and immersing the items in cold water increases the freezing speed and efficiency of fruits and vegetables with high latent heat, achieving deep freezing. It also improves the cleaning effect and quality of the items. Preferably, the items to be frozen are completely submerged below the liquid surface of the water collection tank 42, further enhancing the freezing effect of the cold water.

[0045] Furthermore, to further improve resource utilization, the quick-freezing machine also includes a circulation mechanism 6. The inlet of the circulation mechanism 6 is connected to the water collection tank 42, and the outlet of the circulation mechanism 6 is connected to the water supply structure 53. Water that has exchanged heat with the items to be frozen in the water collection tank 42 is circulated to the water supply structure 53 for reuse, thus improving the resource utilization rate of the quick-freezing machine. A filter mechanism is installed at the inlet of the circulation mechanism 6 to filter impurities and residues from the cleaning area on the items to be frozen, ensuring the cleanliness of the water supplied from the water supply structure 53 to the first refrigeration structure 51. This prevents impurities from contaminating the first refrigeration structure 51 or even the items to be frozen, ensuring the reliable operation of the quick-freezing machine.

[0046] The air-cooling structure 3 includes a fan 31, which is positioned between the first refrigeration structure 51 and the conveyor belt 2, with the fan 31's air outlet direction facing the conveyor belt 2. The fan 31 transports the cold energy generated at the first refrigeration structure 51 to the conveyor belt 2, thereby enabling rapid freezing of the items to be frozen within the first air-cooling chamber 11 and the second air-cooling chamber 13. This facilitates gas flow within the first and second air-cooling chambers 11 and 13, improving the rapid freezing effect of the items.

[0047] The air-cooled structure 3 also includes a ventilation baffle, which is disposed between the fan 31 and the conveyor belt 2, and has air passage holes. The ventilation baffle evenly distributes the cold air blown out by the fan 31, while simultaneously reducing the flow area and increasing the air velocity. This creates a velocity difference between the upper and lower surfaces of the item to be frozen, which facilitates rapid cooling of the item's surface and improves freezing efficiency. Finally, the cold air circulates back to the evaporator through the return air vent via the lower baffle below the conveyor belt 2 to complete the next round of refrigeration.

[0048] The ventilation baffle includes a first ventilation plate 32 and a second ventilation plate 33. The first ventilation plate 32 is disposed within the first air-cooling cavity 11, and the second ventilation plate 33 is disposed within the second air-cooling cavity 13. The flow area of ​​the air passage holes on the first ventilation plate 32 is smaller than that on the second ventilation plate 33. Since the items to be frozen located in the second air-cooling cavity 13 have already undergone water cooling by the water-cooling structure 4, increasing the flow area of ​​the air passage holes on the second ventilation plate 33 can reliably blow out residual moisture from the items to be frozen while ensuring uniform airflow, facilitating subsequent packaging and improving the quality of the items to be frozen.

[0049] The conveyor belt 2 is provided with grid holes. This not only allows the water sprayed by the first spraying mechanism 41 to be collected in the water collection tank 42 below through the conveyor belt 2, but also allows the cold air from the air-cooling structure 3 to pass through the conveyor belt 2 to reach the bottom of the items to be frozen. This helps to increase the contact area between the cold air and the items to be frozen, promotes heat exchange, and improves the freezing speed of the items to be frozen.

[0050] When using a quick-freezing machine to quickly freeze items, the specific process is as follows:

[0051] Before placing items to be frozen (such as lychees and other fruits and vegetables with high latent heat) into the inlet of the quick-freezing machine, the first refrigeration structure 51 of the quick-freezing machine needs to be turned on in advance to lower the temperature inside the casing 1 of the quick-freezing machine to a suitable level. Then, room temperature water is injected into the water inlet of the water supply structure 53 and sprayed onto the first refrigeration structure 51 through the outlet of the second spray mechanism. The first refrigeration structure 51 absorbs heat and carries away the temperature of the sprayed water, thus cooling it down. Simultaneously, after the first refrigeration structure 51 has been operating for a long time, frost forms on the fin surface. The room temperature water flowing through the first refrigeration structure 51 is cooled and also carries away the frost on the fins, improving the heat exchange efficiency of the first refrigeration structure 51. The water flowing through the first refrigeration structure 51 flows into the defrosting water tank 55 through the water receiving tray 52. ​​The defrosting water tank 55 is equipped with temperature and water level detection devices to determine the water temperature and water level height h within the defrosting water tank 55. Specifically, when the water temperature in the defrost water tank 55 is greater than 3°C, the on / off mechanism of the second refrigeration structure 54 is opened to allow the refrigerant in the first refrigeration structure 51 to enter the second refrigeration structure 54 and cool down the water in the defrost water tank 55, ensuring that the water temperature in the defrost water tank 55 is maintained between 0-3°C; and when the water level and water temperature in the defrost water tank 55 meet the spraying requirements of the first spraying mechanism 41, the first spraying mechanism 41 will be opened to carry out spraying operations.

[0052] Water sprayed by the first spraying mechanism 41 flows over the mesh conveyor belt 2 and is collected in the water collection tank 42 for water cooling of the items to be frozen. The water collection tank 42 is equipped with an overflow outlet and a drain pipe. The overflow outlet must be high enough to completely submerge the items to be frozen. The water collection tank 42 is also equipped with a water temperature detection device. The circulation mechanism 6 includes a circulating water tank 61, a water pump 62, and a circulating water pipe 63. When the water temperature in the water collection tank 42 is detected to be greater than 5°C, the circulation mechanism 6 will be opened to drain the water from the water collection tank 42 into the circulating water tank 61 below the conveyor belt 2. The water pump 62 pumps the water in the circulating water tank 61 to the water supply structure 53 through the circulating water pipe 63. Water with excessively high temperatures can be recycled back to the water supply structure 53 for reuse. The flow path of the circulating water is as follows: Figure 6 As shown.

[0053] When the water level and temperature in the water collection tank 42 meet the working requirements, the items to be frozen are placed at the inlet of the quick-freezing machine and slowly moved forward by the conveyor belt 2. The items first undergo preliminary air cooling pre-cooling in the first air-cooling chamber 11 of the quick-freezing machine. The air-cooling structure 3 in the first air-cooling chamber 11 transports the cold air cooled by the first refrigeration structure 51 into the first air-cooling chamber 11. Then, the cold air passes through the air holes on the first ventilation plate 32 and is blown onto the surface of the items to be frozen, causing initial overall cooling. Because the openings of the air holes in the first ventilation plate 32 are small, the speed of the cold air passing through the first ventilation plate 32 can be increased. Simultaneously, the conveyor belt 2 adopts a mesh structure, which facilitates air circulation and the filtration of impurities under the surface of the items to be frozen. Figure 7 As shown in the diagram of the cold air circulation during the operation of the quick-freezing machine, the accelerated cold air passes over the surface of the items to be frozen. At the same time, there is also cold air flowing below, but at a lower speed. Therefore, a speed difference can be formed between the upper and lower surfaces of the items to be frozen, which is conducive to the rapid cooling of the surface of the items to be frozen and improves the freezing efficiency. Finally, the cold air is circulated back to the evaporator through the return air vent via the lower partition below the conveyor belt 2 to complete the next round of refrigeration.

[0054] Subsequently, conveyor belt 2 transports the items to be frozen to the water-cooled chamber 12 of the quick-freezing machine for water bath cooling. The water-cooled chamber 12 is divided into two stages: spraying and water bathing. The first spraying mechanism 41 above the conveyor belt 2 continuously sprays cold water. The temperature of this cold water is slightly lower than the temperature of the cold air in the first air-cooled chamber 11 of the quick-freezing machine. The purpose is to further complete the freezing of the items to be frozen. At the same time, the sprayed water has a certain flow rate, which can effectively remove residues and insect eggs from the surface of the items to be frozen. Then, the items to be frozen arrive at the water bath stage. The items to be frozen are immersed in cold water. Since the specific heat capacity of water is greater than that of air, immersing the items to be frozen in cold water can increase the freezing speed and freezing efficiency of items with large latent heat, achieving deep freezing of the items to be frozen. Finally, the items to be frozen are transported to the second air-cooled chamber 13 of the quick-freezing machine for air cooling and drying. The only difference between the second air-cooled chamber 13 and the first air-cooled chamber 11 of the quick-freezing machine is that the flow area of ​​the air passage holes of the second ventilation plate 33 is larger than that of the air passage holes of the first ventilation plate 32. The larger opening can deliver airflow at a uniform speed, stably and evenly delivering airflow to the surface of the items to be frozen on the conveyor belt 2. While further freezing the items to be frozen, the airflow can dry the moisture remaining on the surface of the items after the water bath, which is convenient for subsequent packaging and improves the quality of the items to be frozen.

[0055] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A flash freezer characterised in that: include: Shell (1); The conveyor belt (2) is at least partially disposed within the housing (1); Along the conveying direction of the conveyor belt (2), the interior of the housing (1) includes a first air-cooled cavity (11), a water-cooled cavity (12), and a second air-cooled cavity (13) connected in sequence. Both the first air-cooled cavity (11) and the second air-cooled cavity (13) are provided with air-cooling structures (3); The water-cooled cavity (12) is provided with a water-cooled structure (4). The water-cooling structure (4) includes a first spray mechanism (41), which is disposed inside the housing (1) and located above the conveyor belt (2). The spraying direction of the first spray mechanism (41) is towards the conveyor belt (2). The quick-freezing machine also includes a first refrigeration structure (51) and a water receiving tray (52), both of which are disposed inside the housing (1). The water receiving tray (52) is located below the first refrigeration structure (51), and the inlet of the first spray mechanism (41) is connected to the water receiving tray (52). The quick-freezing machine also includes a water supply structure (53), which is disposed on the housing (1) and the outlet of the water supply structure (53) is towards the first refrigeration structure (51). The first refrigeration structure (51) passes through the first air-cooled cavity (11), the water-cooled cavity (12) and the second air-cooled cavity (13), and simultaneously provides cooling for the first air-cooled cavity (11), the water-cooled cavity (12) and the second air-cooled cavity (13); the water supplied by the water supply structure (53) flows through the first refrigeration structure (51) to form defrosting water, and the water receiving tray (52) is used to receive the defrosting water and supply the defrosting water to the first spray mechanism (41).

2. The flash freezer of claim 1, wherein: The water supply structure (53) includes a second spray mechanism, which is disposed inside the housing (1). The second spray mechanism is located above the first refrigeration structure (51), and the spraying direction of the second spray mechanism is towards the first refrigeration structure (51).

3. The flash freezer of claim 1, wherein: The quick-freezing machine also includes a defrosting water tank (55) and a second refrigeration structure (54). The defrosting water tank (55) is located below the water receiving tray (52). The defrosting water tank (55) is used to receive defrosting water and condensation water and to supply water to the first spraying mechanism (41). The second refrigeration structure (54) is located inside the defrosting water tank (55).

4. The flash freezer of claim 1, wherein: The water-cooling structure (4) includes a water collection tank (42), which is disposed inside the housing (1) and is located below the first spraying mechanism (41).

5. The quick-freezing machine according to claim 4, characterized in that: Part of the conveyor belt (2) is located below the liquid surface of the water collection tank (42).

6. The quick-freezing machine according to claim 4, characterized in that: The quick-freezing machine also includes a circulation mechanism (6), the inlet of which is connected to the water collection tank (42), and the outlet of which is connected to the water supply structure (53).

7. The quick-freezing machine according to claim 1, characterized in that: The air-cooled structure (3) includes a fan (31), which is disposed between the first refrigeration structure (51) and the conveyor belt (2), and the air outlet direction of the fan (31) is towards the conveyor belt (2).

8. The quick-freezing machine according to claim 7, characterized in that: The air-cooled structure (3) also includes a ventilation baffle, which is disposed between the fan (31) and the conveyor belt (2), and the ventilation baffle is provided with air passage holes.

9. The quick-freezing machine according to claim 8, characterized in that: The ventilation baffle includes a first ventilation plate (32) and a second ventilation plate (33). The first ventilation plate (32) is disposed in the first air-cooled cavity (11), and the second ventilation plate (33) is disposed in the second air-cooled cavity (13). The flow area of ​​the air passage on the first ventilation plate (32) is smaller than the flow area of ​​the air passage on the second ventilation plate (33).

10. The quick-freezing machine according to claim 1, characterized in that: The conveyor belt (2) is provided with grid holes.

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