A device and method for ultrasonic-assisted quick freezing of aquatic products

Abstract

The present invention relates to the field of aquatic product freezing technology, specifically to a device and method for ultrasonic-assisted quick freezing of aquatic products, wherein the device for ultrasonic-assisted quick freezing of aquatic products comprises a freezer with a door on the front side, a partition is fixed near the inner top wall of the freezer, an atomizing mechanism is arranged above the partition in the freezer, a mounting sleeve with the bottom opening facing downward is arranged below the partition, an ultrasonic generating device is arranged in the mounting sleeve, the atomizing mechanism is used to atomize water into fine droplets and then transport them into the mounting sleeve, and the ultrasonic generating device is used to generate ultrasonic waves to cavitate the water droplets in the mounting sleeve. The present invention uses ultrasonic waves to evenly attach fine droplets to the outer surface of the aquatic product, and continuously forms tiny bubbles with high energy state in the fine droplets, which absorb surrounding heat and collapse rapidly, improve heat transfer efficiency, accelerate the transfer of cold in the frozen air to the surface of the aquatic product, and thus accelerate the freezing speed of the aquatic product.

Description

Technical Field

[0001] The invention relates to the technical field of aquatic product freezing, and in particular to a device and method for quick-freezing aquatic products based on ultrasound assistance. Background Art

[0002] Aquatic products need to be frozen after being caught. Freezing aquatic products can extend the freshness and shelf life of the food. At the same time, freezing can reduce the number of bacteria and parasites in aquatic products, reducing the risk of food poisoning and infection. In addition, frozen aquatic products can be preserved for a long time, making them more convenient to store and transport, without having to worry about the freshness and quality of aquatic products during transportation.

[0003] Aquatic products are mainly frozen by freezing equipment such as freezers, freezers and freezers. Traditional aquatic product freezing equipment usually uses conduction or convection to freeze, and the freezing speed is relatively slow, resulting in a long freezing process. It is not only energy-intensive but also inefficient. Secondly, when traditional freezing equipment freezes aquatic products, the freezing effect is uneven, resulting in partial overcooling or overheating of some aquatic products during the freezing process, affecting the quality of the aquatic products. In addition, traditional freezing equipment will produce a large area of ​​ice on the surface of the aquatic products during the freezing process, resulting in changes in the texture of the aquatic products or freezer damage, affecting the taste and edible quality of the aquatic products. Summary of the invention

[0004] The object of the present invention is to provide a device and method for ultrasonic-assisted quick freezing of aquatic products to solve the technical problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions.

[0006] A device for quick freezing aquatic products based on ultrasound assistance comprises a freezer with a door on the front side, a partition is fixed near the inner top wall of the freezer, an atomizing mechanism is arranged above the partition in the freezer, a mounting sleeve with a bottom opening facing downward is arranged below the partition, an ultrasonic generating device is arranged in the mounting sleeve, the atomizing mechanism is used to atomize water into fine droplets and then transport them into the mounting sleeve, the ultrasonic generating device is used to generate ultrasonic waves to cavitate the water mist droplets in the mounting sleeve, and transport the cavitated water mist droplets downward, a rotating seat with one end extending through the freezer is installed on the rear side of the freezer, a pair of hollow frames aligned with the lower end opening of the mounting sleeve are arranged on the end of the rotating seat located in the freezer through a first driving mechanism, and the first driving mechanism is used to drive the two hollow frames to approach each other to limit and clamp the aquatic products.

[0007] Preferably, the atomizing mechanism comprises an inner cylinder sealed at both ends, an outer cylinder with an opening at the bottom end, an atomizing nozzle installed on the top of the freezer, an inlet pipe connected to the atomizing nozzle, and a fan, the inner cylinder is fixed on the inner top wall of the freezer, the outer cylinder is fixedly sleeved on the outside of the inner cylinder, the bottom end of the inner cylinder extends into the outer cylinder, the fan is installed in the outer cylinder and is located below the inner cylinder, the atomizing nozzle extends through and extends into the inner cylinder, and the spray port is aligned with the inner bottom wall of the inner cylinder, the outer cylinder passes through the partition, the top end of the mounting sleeve is fixedly connected and communicated with the bottom end of the outer cylinder, the outer peripheral surface of the outer cylinder is arranged in a ring shape around its axis, each of the inlets is communicated with the inside of the outer cylinder, and the outer peripheral surface of the inner cylinder and at the same height as the inlet are arranged in a ring shape around the axis of the inner cylinder. Each of the inlets is communicated with the inside of the outer cylinder, and the inner peripheral surface of the inner cylinder and at the same height as the inlet are arranged in a ring shape around the axis of the inner cylinder. Each of the outlets is communicated with the inside of the inner cylinder.

[0008] Preferably, the ultrasonic generating device includes an ultrasonic sonication rod, an ultrasonic generator and a center rod. A plurality of diverter plates are arranged in a ring shape around the axis of the mounting sleeve on the inner edge wall. A vertically extending diverter cavity is formed between two adjacent diverter plates. The center rod is vertically arranged in the mounting sleeve. One end of each diverter plate facing the axis of the mounting sleeve is fixed to the outer surface of the center rod. A socket extending vertically upward is provided at the bottom end of the center rod. The ultrasonic sonication rod is inserted into the socket. The ultrasonic generator is fixed to the side of the freezer and is electrically connected to the ultrasonic sonication rod.

[0009] Preferably, vertically extending guide boxes are fixed on the inner walls on both sides of the freezer, and the two guide boxes are symmetrically distributed on both sides of the mounting sleeve. The top and bottom of the guide boxes have openings, and the partition is provided with through flow openings at positions corresponding to the positions of the two guide boxes. The flow openings are connected to the top openings of the guide boxes on the same side, and the distance between the bottom openings of the two guide boxes is greater than the inner diameter of the lower port of the mounting sleeve.

[0010] Preferably, the first driving mechanism includes a pair of sliding seats, a pair of telescopic cylinders and a pair of connecting plates. A sliding groove is provided on the end face of the rotating seat located in the freezer. The two sliding seats are limitedly slidably installed in the sliding groove. The two telescopic cylinders are symmetrically arranged on both sides of the outer wall of the rotating seat, and the telescopic rods of the two telescopic cylinders extend through the sliding groove. The two connecting plates are fixed one-to-one to the ends of the telescopic rods of the two telescopic cylinders, and are fixedly connected to the sliding seats one-to-one. The two hollow frames are fixed one-to-one to the two sliding seats.

[0011] Preferably, a second driving mechanism for driving the rotating seat to rotate is provided on the rear side of the freezer, and the second driving mechanism includes a fixing frame fixed to the rear surface of the freezer, a driving motor fixed on the fixing frame, a main gear fixed to the end of the output shaft of the driving motor, a shaft coaxially fixed to the end of the rotating seat located outside the freezer, and a driven gear fixed to the end of the shaft, and the main gear is meshed with the driven gear accordingly.

[0012] Preferably, a slider is installed inside the socket near the inner top wall, which is slidably fitted with the outer edge wall and the inner wall of the socket, a joint is fixed on the lower surface of the slider, and the joint is electrically connected to the ultrasonic generator through a wire, a vertically extending spring is provided in the socket and above the slider, the top of the spring is fixed to the inner top wall of the socket, and the bottom is fixed to the upper surface of the slider, a plug interface that matches the connector is provided on the top of the ultrasonic sonication rod, a side support arm is fixed to the side of the ultrasonic sonication rod near the bottom, a bayonet is fixed on the lower surface of the side support arm, a C-shaped arm is fixed to the side of the center rod, and the C-shaped arm is provided with a card hole for the bayonet to be inserted.

[0013] Preferably, an electric heating plate is embedded and fixed on the bottom wall of the built-in cylinder, a drainage pipe is connected to the side of the built-in cylinder, one end of the drainage pipe is connected to the bottom of the built-in cylinder, and the other end of the drainage pipe passes through the outer cylinder and the freezer in sequence and extends to the outside of the freezer.

[0014] The present invention also provides a method for quick freezing aquatic products based on ultrasound assistance, and the specific steps are as follows:

[0015] Step 1: drain the water from the surface of the salvaged aquatic product, then place the aquatic product between two hollow frames in the freezer and clamp them in place;

[0016] Step 2: The water is atomized by the atomizing mechanism, and the formed fine droplets are transported into the installation sleeve. The ultrasonic generator generates ultrasonic waves, cavitates the fine droplets and continues to transport them downward;

[0017] Step 3: The cavitated tiny droplets evenly fall on the surface of the aquatic product, improving the heat transfer efficiency, quickly transferring the cold air in the freezer to the surface of the aquatic product, and accelerating freezing;

[0018] Step 4: Drive the two hollow frames to rotate to change the surface of the aquatic products and ensure that the freezing effect of the surface of the aquatic products is uniform;

[0019] Step 5: After the freezing is completed, the two hollow frames are driven away from each other by the first driving mechanism, and the frozen aquatic product is taken out.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0021] 1. The present invention uses ultrasonic wave to make tiny droplets evenly adhere to the outer surface of aquatic products, and continuously form tiny bubbles with high energy state in the tiny droplets, which absorb the surrounding heat and collapse quickly, improve the heat transfer efficiency, cause the local temperature to change sharply, accelerate the transfer of cold in the freezing air to the surface of the aquatic products, and then accelerate the freezing speed of the aquatic products.

[0022] 2. The present invention uses the effect of ultrasound to make water droplets evenly distributed on the surface of aquatic products, ensuring that the cooling speed of the surface of aquatic products is uniform, avoiding incomplete freezing or excessive freezing due to local temperature unevenness, and improving the freezing quality of aquatic products. In addition, since the freezing process is faster and more uniform, the cold capacity in the freezer can be more effectively utilized, reducing energy waste, which is beneficial to energy conservation and emission reduction.

[0023] 3. The present invention accelerates the freezing speed, and the water loss of aquatic products during the freezing process is less, which helps to maintain the texture and taste of the aquatic products. At the same time, the uniform freezing of small droplets can avoid large areas of ice on the surface of the aquatic products, thereby reducing the freezing damage of the aquatic products, thereby achieving the purpose of improving the taste and edible quality of the aquatic products.

[0024] 4. In the present invention, the airflow flowing out of the installation sleeve eventually flows into the guide boxes on both sides at the bottom of the freezer, thereby forming a wind field in the freezer, and the distance between the bottom openings of the two guide boxes is greater than the inner diameter of the lower port of the installation sleeve, so that the cross-section of the wind field increases downward, ensuring that the fine droplets in the wind field are sufficient to cover the aquatic products between the two hollow frames. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is one of the three-dimensional schematic diagrams of the overall structure of the present invention;

[0026] Figure 2 This is the second three-dimensional schematic diagram of the overall structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the partial internal structure of the freezer in the present invention;

[0028] Figure 4 It is a schematic diagram of a partial cross-section structure of a freezer in the present invention;

[0029] Figure 5 It is a three-dimensional schematic diagram of the local structure of the present invention;

[0030] Figure 6 It is a schematic diagram of the partial internal structure of the installation sleeve in the present invention;

[0031] Figure 7 It is a schematic cross-sectional view of a local structure in the present invention;

[0032] Figure 8 for Figure 7 A schematic diagram of the structure enlargement in the middle;

[0033] Fig. 9 for Figure 7 A magnified schematic diagram of the structure at B in the middle;

[0034] Fig.10It is a schematic diagram of the local structure of the surface of the rotating seat in the present invention;

[0035] Fig.11 Detailed structural diagram of the first and second driving mechanisms in the present invention;

[0036] Fig.12 Schematic diagram of airflow movement distribution in the present invention;

[0037] Fig.13 A schematic flow chart of the specific steps of the method for ultrasonic-assisted quick freezing of aquatic products provided by the present invention.

[0038] In the figure: 1, freezer; 11, partition; 12, cabinet door; 111, circulation port; 2, mounting sleeve; 3, atomization mechanism; 31, built-in cylinder; 311, outlet; 312, electric heating plate; 313, discharge pipe; 32, outer cylinder; 321, inlet; 33, atomization nozzle; 34, inlet pipe; 35, fan; 4, ultrasonic generator; 41, ultrasonic sonication rod; 411, plug interface; 412, side arm; 413, bayonet; 414, C-shaped arm; 415, bayonet hole ; 42. Ultrasonic generator; 43. Center rod; 431. Socket; 432. Slider; 433. Joint; 434. Spring; 44. Diverter plate; 441. Diverter cavity; 5. Rotating seat; 6. First driving mechanism; 601. Sliding groove; 61. Sliding seat; 62. Telescopic cylinder; 63. Connecting plate; 7. Hollow frame; 8. Second driving mechanism; 81. Fixed frame; 82. Driving motor; 83. Main gear; 84. Shaft; 85. Driven gear; 9. Guide box; 91. Wind field. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1 - Fig.12The present invention provides a device for quick freezing aquatic products based on ultrasound assistance, including a freezer 1 with a cabinet door 12 on the front side, and the freezer 1 is also equipped with a refrigeration system for freezing (not shown in the figure), which adopts the existing refrigeration technology to supply cold to the freezer 1. The specific structure and working principle of the refrigeration system are not described in detail. A partition 11 is fixed near the inner top wall of the freezer 1, an atomization mechanism 3 is arranged above the partition 11 in the freezer 1, and a mounting sleeve 2 with a bottom end opening facing downward is arranged below the partition 11, and a mounting sleeve 2 is arranged inside the mounting sleeve 2. An ultrasonic generating device 4 is provided, and a rotating seat 5 with one end extending into the freezer 1 is installed on the rear side of the freezer 1. The rotating seat 5 is located on the end inside the freezer 1 and is arranged with a pair of hollow frames 7 aligned with the opening of the lower end of the mounting sleeve 2 through a first driving mechanism 6. The first driving mechanism 6 is used to drive the two hollow frames 7 to approach each other to limit and clamp the aquatic product, place the aquatic product between the two hollow frames 7, and clamp and limit the position to achieve stable placement of the aquatic product. The hollow frame 7 is replaceable and can be replaced according to different types of aquatic products.

[0041] The atomizing mechanism 3 is used to atomize water into fine droplets and then transport them into the installation sleeve 2. The ultrasonic generating device 4 is used to generate ultrasonic waves to cavitate the water droplets in the installation sleeve 2. Specifically, when the ultrasonic waves propagate in the water droplets, they will cause changes in the local pressure in the water droplets, and form tiny cavities to form bubbles. In the process of periodic changes in the positive and negative pressures of the ultrasonic waves, the positive pressure stage causes the bubbles to shrink, and in the negative pressure stage, the bubbles expand. When the bubbles expand to the point where the surface tension of the droplets cannot resist the expansion, the bubbles quickly collapse to form a number of smaller droplets, and fall down on the surface of the aquatic product.

[0042] The atomized water droplets are cavitated into smaller droplets through the ultrasonic generating device 4, and are evenly distributed on the surface of the aquatic product through the hollow frame 7. As the ultrasonic generating device 4 continues to work, the ultrasonic waves generated can continue to act on the droplets on the surface of the aquatic product, so that tiny bubbles continue to form in the droplets. The formed tiny bubbles have a high energy state, absorb the surrounding heat and collapse quickly, improve the heat transfer efficiency, cause a sharp change in local temperature, accelerate the transfer of cold in the freezing air to the surface of the aquatic product, and then accelerate the freezing speed of the aquatic product.

[0043] The water mist droplets are evenly distributed on the surface of the aquatic product through the action of ultrasound, ensuring that the cooling speed of the surface of the aquatic product is uniform, avoiding incomplete freezing or excessive freezing due to local temperature unevenness, and improving the freezing quality of the aquatic product. In addition, since the freezing process is faster and more uniform, the cold capacity in the freezer 1 can be more effectively utilized, reducing energy waste, which is beneficial to energy conservation and emission reduction.

[0044] In addition, by speeding up the freezing speed, aquatic products lose less water during the freezing process, which helps to maintain the texture and taste of the aquatic products. At the same time, the uniform freezing of small droplets can avoid large areas of ice on the surface of aquatic products, thereby reducing freezing damage to aquatic products, thereby achieving the purpose of improving the taste and edible quality of aquatic products.

[0045] See also Figure 3 , Figure 4 and Figure 7 The atomizing mechanism 3 includes an inner cylinder 31 sealed at both ends, an outer cylinder 32 with an opening at the bottom end, an atomizing nozzle 33 installed on the top of the freezer 1, an inlet pipe 34 connected to the atomizing nozzle 33, and a fan 35. The inner cylinder 31 is fixed on the inner top wall of the freezer 1, the outer cylinder 32 is fixedly sleeved on the outside of the inner cylinder 31, the bottom end of the inner cylinder 31 extends into the outer cylinder 32, the fan 35 is installed in the outer cylinder 32 and is located below the inner cylinder 31, the atomizing nozzle 33 extends through the inner cylinder 31, and the spray port is aligned with the inner bottom wall of the inner cylinder 31, the outer cylinder 32 passes through the partition 11, the top end of the mounting sleeve 2 is fixedly connected and communicated with the bottom end of the outer cylinder 32, and the outer peripheral surface of the outer cylinder 32 is annularly arrayed around its axis with a plurality of The inlet 321 is connected to the interior of the outer cylinder 32. A plurality of outlets 311 are arranged on the outer peripheral surface of the inner cylinder 31 and at the same height as the inlet 321 around the axis of the inner cylinder 31 in a ring-shaped array. Each outlet 311 is connected to the interior of the inner cylinder 31. The fan 35 works in the outer cylinder 32 to form a vertical downward airflow, so that the external air enters the outer cylinder 32 through the inlet 321 and flows downward. The inlet pipe 34 is connected to the water pump in the water storage tank, which can pump water to the atomizing nozzle 33 and spray it into the inner cylinder 31 in atomized form. The atomized droplets float out to the outside of the inner cylinder 31 through the outlet 311. After encountering the airflow entering the outer cylinder 32 from the inlet 321, they flow downward into the installation sleeve 2 along with the airflow.

[0046] See also Figure 2 , Figure 4 , Figure 6 , Figure 7 and Figure 8The ultrasonic generating device 4 includes an ultrasonic sonication rod 41, an ultrasonic generator 42 and a center rod 43. A plurality of diverter plates 44 are arranged in a ring shape around the axis of the mounting sleeve 2 on the inner edge wall thereof. A vertically extending diverter channel 441 is formed between two adjacent diverter plates 44. The center rod 43 is vertically arranged in the mounting sleeve 2. One end of each diverter plate 44 facing the axis of the mounting sleeve 2 is fixed to the outer surface of the center rod 43. A socket 431 extending vertically upward is provided at the bottom end of the center rod 43. The ultrasonic sonication rod 41 is inserted into the socket 431. The ultrasonic generator 42 is fixed to the side of the freezer 1 and is electrically connected to the ultrasonic sonication rod 41. The ultrasonic generator 42 generates an ultrasonic signal, which is transmitted to the ultrasonic sonication rod 41. The ultrasonic sonication rod 41 conducts the ultrasonic wave. When the airflow and the spray droplets flow into the diverter cavity 441 in the mounting sleeve 2, the ultrasonic wave generated by the ultrasonic sonication rod 41 can achieve cavitation effect on the spray droplets in the airflow, and the diverter cavity 441 separated by the diverter plate 44 can divert the airflow and the spray droplets to avoid the aggregation of the airflow and the spray droplets.

[0047] See also Figure 3 , Figure 7 and Fig.12 , vertically extending guide boxes 9 are fixed on the inner walls on both sides of the freezer 1, and the two guide boxes 9 are symmetrically distributed on both sides of the mounting sleeve 2. The top and bottom of the guide boxes 9 have openings, and the partition 11 is provided with through flow ports 111 corresponding to the positions of the two guide boxes 9. The flow ports 111 are connected with the top openings of the guide boxes 9 on the same side. When the fan 35 is working, the airflow above the partition 11 enters the outer cylinder 32 and is blown out from the bottom of the mounting sleeve 2, while the airflow in the freezer 1 flows into the guide box 9 through the lower port of the guide box 9, and flows vertically upward, and flows into the top of the partition 11 through the flow ports 111, so as to replenish the gas, thereby forming a circulating airflow.

[0048] The airflow flowing out of the installation sleeve 2 eventually flows into the guide boxes 9 on both sides at the bottom of the freezer 1, thereby forming a wind field 91 in the freezer 1. The distance between the bottom openings of the two guide boxes 9 is larger than the inner diameter of the lower port of the installation sleeve 2, so that the cross-section of the wind field 91 increases downward, ensuring that the fine droplets in the wind field 91 are sufficient to cover the aquatic products between the two hollow frames 7.

[0049] See also Figure 3 , Fig.10 and Fig.11The first driving mechanism 6 includes a pair of sliding seats 61, a pair of telescopic cylinders 62 and a pair of connecting plates 63. A sliding groove 601 is provided on the end surface of the rotating seat 5 located in the freezer 1. The two sliding seats 61 are limitedly slidably installed in the sliding groove 601. The two telescopic cylinders 62 are symmetrically arranged on both sides of the outer wall of the rotating seat 5, and the telescopic rods of the two telescopic cylinders 62 extend through and extend into the sliding groove 601. The two connecting plates 63 are fixed on the ends of the telescopic rods of the two telescopic cylinders 62 in a one-to-one manner, and are fixedly connected to the sliding seats 61 in a one-to-one manner. The two hollow frames 7 are fixed on the two sliding seats 61 in a one-to-one manner. The two telescopic cylinders 62 extend at the same time. Under the connection action of the sliding seat 61 and the connecting plate 63, the two hollow frames 7 are driven to approach each other to achieve limited clamping of the aquatic products. The two telescopic cylinders 62 retract at the same time to drive the two hollow frames 7 away from each other, and the clamping can be cancelled, which is convenient for taking out the aquatic products.

[0050] See also Figure 2 , Fig.10 and Fig.11 A second driving mechanism 8 for driving the rotating seat 5 to rotate is provided on the rear side of the freezer 1. The second driving mechanism 8 includes a fixing frame 81 fixed on the rear surface of the freezer 1, a driving motor 82 fixed on the fixing frame 81, a main gear 83 fixed on the end of the output shaft of the driving motor 82, a shaft 84 coaxially fixed on the end of the rotating seat 5 located outside the freezer 1, and a driven gear 85 fixed on the end of the shaft 84. The main gear 83 is meshed with the driven gear 85. When the driving motor 82 works, its output shaft drives the main gear 83 to rotate. The rotating main gear 83 meshes with the driven gear 85 and drives the shaft 84 and the rotating seat 5 to rotate, thereby driving the two hollow frames 7 and the aquatic products to rotate, thereby changing the surface of the aquatic products and ensuring uniform freezing of the surface of the aquatic products.

[0051] Due to long-term exposure, the surface of the ultrasonic sonication rod 41 may be corroded or damaged, which may affect the normal propagation of ultrasonic waves, making the ultrasonic sonication rod 41 a vulnerable part. Therefore, the ultrasonic sonication rod 41 needs to be designed to be detachable and replaceable. Figure 7 , Figure 8 and Fig. 9A slider 432 is installed inside the socket 431 near its inner top wall, which is slidably fitted with the outer edge wall and the inner wall of the socket 431. A joint 433 is fixed to the lower surface of the slider 432, and the joint 433 is electrically connected to the ultrasonic generator 42 through a wire. A vertically extending spring 434 is provided in the socket 431 and above the slider 432. The top of the spring 434 is fixed to the inner top wall of the socket 431, and the bottom end is fixed to the upper surface of the slider 432. A plug interface 411 that is plugged and matched with the joint 433 is provided on the top of the ultrasonic sonication rod 41. A side arm 412 is fixed to the side of the ultrasonic sonication rod 41 near its bottom, and a bayonet 413 is fixed to the lower surface of the side arm 412. A C-shaped arm 414 is fixed to the side of the center rod 43, and a card hole 415 is provided on the C-shaped arm 414 for the matching insertion of the bayonet 413.

[0052] Insert the ultrasonic sonication rod 41 into the socket 431 so that the connector 433 is aligned and inserted into the socket 411 to achieve electrical connection between the ultrasonic sonication rod 41 and the ultrasonic generator 42. At the same time, push the ultrasonic sonication rod 41 upward, the spring 434 is forced to shrink, and the slider 432 slides upward. Then, rotate the ultrasonic sonication rod 41 to move the pin 413 to the top of the hole 415. Then, slowly release the ultrasonic sonication rod 41. Under the elastic force of the spring 434, the ultrasonic sonication rod 41 is pushed downward, and the pin 413 is driven to be inserted into the hole 415 to achieve the secure installation of the ultrasonic sonication rod 41. In addition, when disassembling, push the ultrasonic sonication rod 41 upward and rotate it, and then the ultrasonic sonication rod 41 can be taken out from the socket 431 for easy replacement.

[0053] See also Figure 1 - Figure 4 and Figure 7 An electric heating plate 312 is embedded and fixed on the bottom wall of the built-in cylinder 31, and a drain pipe 313 is connected to the side of the built-in cylinder 31. One end of the drain pipe 313 is connected to the bottom of the built-in cylinder 31, and the other end of the drain pipe 313 passes through the outer cylinder 32 and the freezer 1 in sequence and extends to the outside of the freezer 1. The heat generated by the electric heating plate 312 can melt the frozen water at the bottom of the built-in cylinder 31 and discharge it through the drain pipe 313, thereby avoiding excessive freezing in the built-in cylinder 31 and affecting normal work.

[0054] See also Fig.13 The present invention also provides a method for quick freezing aquatic products based on ultrasound assistance, and the specific steps are as follows:

[0055] Step 1: drain the water from the surface of the salvaged aquatic product, then place the aquatic product between the two hollow frames 7 in the freezer 1 and clamp them in position;

[0056] Step 2: The atomizing mechanism 3 atomizes the water, and transports the formed fine droplets into the installation sleeve 2. The ultrasonic generator 4 generates ultrasonic waves, cavitates the fine droplets, and then transports them downward;

[0057] Step 3: The cavitated fine droplets evenly fall on the surface of the aquatic product, improving the heat transfer efficiency, quickly transferring the cold air in the freezer 1 to the surface of the aquatic product, and accelerating freezing;

[0058] Step 4: The second driving mechanism 8 drives the two hollow frames 7 to rotate along with the rotating seat 5, so as to change the surface of the aquatic product and ensure that the freezing effect of the surface of the aquatic product is uniform;

[0059] Step 5: After the freezing is completed, the first driving mechanism 6 drives the two hollow frames 7 to move away from each other, and the frozen aquatic product is taken out.

[0060] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A device for quick freezing aquatic products based on ultrasound, comprising a freezer (1) having a door (12) on the front side, characterized in that: A partition (11) is fixed near the inner top wall of the freezer (1), an atomizing mechanism (3) is provided above the partition (11) in the freezer (1), a mounting sleeve (2) with a bottom opening facing downward is provided below the partition (11), and an ultrasonic generating device (4) is provided in the mounting sleeve (2); The atomizing mechanism (3) is used to atomize water into fine droplets and then transport them into the installation sleeve (2); the ultrasonic generating device (4) is used to generate ultrasonic waves to cavitate the water droplets in the installation sleeve (2), and transport the cavitated water droplets downward for supply; The rear side of the freezer (1) is provided with a rotating seat (5) with one end extending through the freezer (1); the rotating seat (5) is located at the end of the freezer (1) and is provided with a pair of hollow frames (7) aligned with the lower end opening of the installation sleeve (2) through a first driving mechanism (6); The first driving mechanism (6) is used to drive the two hollow frames (7) to move closer to each other to clamp the aquatic product in a limited position; Vertically extending guide boxes (9) are respectively fixed on the inner walls of both sides of the freezer (1), and the two guide boxes (9) are symmetrically distributed on both sides of the mounting sleeve (2), and the top and bottom of the guide boxes (9) both have openings; The partition plate (11) is provided with through-flow openings (111) at positions corresponding to the two flow guide boxes (9), and the flow openings (111) are connected to the top openings of the flow guide boxes (9) on the same side; The distance between the bottom openings of the two guide boxes (9) is greater than the inner diameter of the lower port of the mounting sleeve (2).

2. The device for ultrasonic-assisted quick freezing of aquatic products according to claim 1, characterized in that: The atomizing mechanism (3) comprises an inner cylinder (31) sealed at both ends, an outer cylinder (32) having an opening at the bottom end, an atomizing nozzle (33) mounted on the top of the freezer (1), an inlet pipe (34) connected to the atomizing nozzle (33), and a fan (35); The internal cylinder (31) is fixed on the inner top wall of the freezing cabinet (1), and the external cylinder (32) is fixedly sleeved on the outside of the internal cylinder (31); The bottom end of the inner cylinder (31) extends into the outer cylinder (32), the fan (35) is installed in the outer cylinder (32) and is located below the inner cylinder (31), the atomizing nozzle (33) extends through the inner cylinder (31), and the spray port is aligned with the inner bottom wall of the inner cylinder (31); The outer cylinder (32) passes through the partition (11), and the top end of the mounting sleeve (2) is fixedly connected and communicated with the bottom end of the outer cylinder (32); The outer peripheral surface of the outer cylinder (32) is provided with a plurality of flow inlets (321) in a ring-shaped array around its axis, and each of the flow inlets (321) is communicated with the interior of the outer cylinder (32); A plurality of outlets (311) are arranged in a ring-shaped array around the axis of the built-in cylinder (31) on the outer peripheral surface of the built-in cylinder (31) and at the same height as the inlet (321), and each of the outlets (311) is communicated with the interior of the built-in cylinder (31).

3. The device for ultrasonic-assisted quick freezing of aquatic products according to claim 1, characterized in that: The ultrasonic wave generating device (4) comprises an ultrasonic sonication rod (41), an ultrasonic wave generator (42) and a central rod (43); A plurality of flow divider plates (44) are arranged in a ring shape around the axis of the inner edge wall of the installation sleeve (2), and a vertically extending flow divider cavity (441) is formed between two adjacent flow divider plates (44); The central rod (43) is vertically arranged in the mounting sleeve (2), and one end of each of the flow dividers (44) facing the axis of the mounting sleeve (2) is fixed to the outer surface of the central rod (43); The bottom end of the central rod (43) is provided with a plug hole (431) extending vertically upwards, and the ultrasonic sonication rod (41) is inserted into the plug hole (431); The ultrasonic generator (42) is fixed to the side of the freezer (1) and is electrically connected to the ultrasonic sonication rod (41).

4. The device for ultrasonic-assisted quick freezing of aquatic products according to claim 1, characterized in that: The first driving mechanism (6) comprises a pair of sliding seats (61), a pair of telescopic cylinders (62) and a pair of connecting plates (63); The end surface of the rotating seat (5) located in the freezing cabinet (1) is provided with a sliding groove (601), and the two sliding seats (61) are limitedly slidably installed in the sliding groove (601); The two telescopic cylinders (62) are symmetrically arranged on both sides of the outer wall of the rotating seat (5), and the telescopic rods of the two telescopic cylinders (62) extend through and into the sliding groove (601); The two connecting plates (63) are fixed on the ends of the telescopic rods of the two telescopic cylinders (62) in a one-to-one correspondence, and are also fixedly connected to the sliding seats (61) in a one-to-one correspondence; The two hollow frames (7) are fixed on the two sliding seats (61) in a one-to-one correspondence.

5. The device for ultrasonic-assisted quick freezing of aquatic products according to claim 1, characterized in that: The rear side of the freezer (1) is provided with a second driving mechanism (8) for driving the rotating seat (5) to rotate, the second driving mechanism (8) comprising a fixing frame (81) fixed to the rear surface of the freezer (1), a driving motor (82) fixed to the fixing frame (81), a main gear (83) fixed to the end of the output shaft of the driving motor (82), a shaft (84) coaxially fixed to the end of the rotating seat (5) located outside the freezer (1), and a driven gear (85) fixed to the end of the shaft (84); The main gear (83) is correspondingly meshed with the driven gear (85).

6. The device for ultrasonic-assisted quick freezing of aquatic products according to claim 3, characterized in that: A slider (432) is installed inside the socket (431) near its inner top wall, and is slidably fitted with the outer edge wall and the inner wall of the socket (431). A connector (433) is fixed on the lower surface of the slider (432). The connector (433) is electrically connected to the ultrasonic generator (42) via a wire. A vertically extending spring (434) is provided in the insertion hole (431) and above the sliding block (432); the top end of the spring (434) is fixed to the top wall of the insertion hole (431), and the bottom end is fixed to the upper surface of the sliding block (432); The top of the ultrasonic sonication rod (41) is provided with a plug interface (411) that is plugged and matched with the connector (433); A side arm (412) is fixed to the side of the ultrasonic sonication rod (41) near the bottom thereof, and a latch (413) is fixed to the lower surface of the side arm (412); A C-shaped arm (414) is fixed to the side of the central rod (43), and a clamping hole (415) for the clamping pin (413) to be matched and inserted is provided on the C-shaped arm (414).

7. The device for ultrasonic-assisted quick freezing of aquatic products according to claim 2, characterized in that: An electric heating plate (312) is embedded and fixed on the inner bottom wall of the built-in cylinder (31), a drainage pipe (313) is connected to the side of the built-in cylinder (31), and one end of the drainage pipe (313) is in communication with the inner bottom of the built-in cylinder (31); The other end of the discharge pipe (313) sequentially passes through the outer cylinder (32) and the freezer (1) and extends to the outside of the freezer (1).

8. A method for ultrasonic-assisted quick freezing of aquatic products, using the device for ultrasonic-assisted quick freezing of aquatic products according to any one of claims 1 to 7, characterized in that: The specific steps are as follows: Step 1: drain the water from the surface of the salvaged aquatic product, then place the aquatic product between the two hollow frames (7) in the freezer (1) and clamp them in place; Step 2: The atomizing mechanism (3) operates to atomize the water, and the formed fine droplets are transported into the installation sleeve (2), and the ultrasonic generating device (4) operates to generate ultrasonic waves, cavitating the fine droplets and continuing to transport them downward; Step 3: the cavitated fine droplets evenly fall on the surface of the aquatic product, thereby improving the heat transfer efficiency, quickly transferring the cold air in the freezer (1) to the surface of the aquatic product, and accelerating freezing; Step 4: driving the two hollow frames (7) to rotate, so as to change the surface of the aquatic product and ensure that the freezing effect of the surface of the aquatic product is uniform; Step 5: After the freezing is completed, the first driving mechanism (6) drives the two hollow frames (7) to move away from each other, and the frozen aquatic product is taken out.

Images