A defrosting device

Abstract

This invention provides a thawing device, including a thawing chamber, a first ultrasonic transducer, a second ultrasonic transducer, and a material pressing assembly. The thawing chamber is used to hold the material and includes a bottom wall and side walls. The first ultrasonic transducer is located on the bottom wall; the second ultrasonic transducer is located on the side wall; and the material pressing assembly is located within the thawing chamber to press the material onto the side wall with the second ultrasonic transducer. This invention provides ultrasonic transducers on both the bottom and side walls of the thawing chamber, enabling a two-dimensional ultrasonic thawing mode for the material, greatly improving the thawing efficiency and uniformity, significantly reducing juice loss, and maximizing the preservation of nutrients. Furthermore, the material pressing assembly presses the material onto the side wall with the ultrasonic transducers, ensuring contact between the material and the side wall, effectively reducing ultrasonic loss from the transducers on the side wall and improving thawing efficiency.

Description

Technical Field

[0001] This invention belongs to the field of food thawing technology, specifically relating to an ultrasonic thawing device. Background Technology

[0002] Freezing is an efficient food preservation method that maintains high-quality food without contamination, and it is widely used in daily life. However, frozen foods generally require thawing before cooking. How to quickly and evenly raise the temperature of food to be thawed from its frozen state (approximately -18°C) to its thawed state has always been a concern.

[0003] However, in existing technologies, air thawing and water thawing take a long time, are easily contaminated by microorganisms and bacteria, result in significant nutrient loss, have large internal and external temperature differences, and are difficult to control the thawing progress. The thawing speed is slow and cannot meet the user's cooking time requirements. Heating wires and heating tubes thaw quickly, but cause serious juice loss and uneven thawing. Usually, the outside of the food is cooked through, while the inside is still frozen. Microwave thawing is fast, less susceptible to microorganisms and bacteria contamination, and results in less nutrient loss. However, it is uneven thawing and is prone to localized burning.

[0004] Ultrasonic defrosting is also a commonly used defrosting method. The ultrasonic transducer is attached to the bottom wall of the defrosting device. During ultrasonic defrosting, the part closer to the ultrasonic transducer defrosts first and gradually generates a heat effect. The side farther away from the ultrasonic transducer takes longer to defrost, resulting in a large temperature difference in the food, uneven defrosting, and loss of juices. In addition, the side that defrosts first has the risk of localized overheating, leading to nutrient loss.

[0005] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0006] This invention provides a thawing device to solve the technical problem of uneven thawing and nutrient loss caused by existing ultrasonic thawing devices.

[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0008] A defrosting device, comprising:

[0009] A thawing chamber for placing the object to be processed, the thawing chamber including a bottom wall and side walls;

[0010] The first ultrasonic transducer is located on the bottom wall;

[0011] The second ultrasonic transducer is located on the side wall;

[0012] The object-to-be-processed pressing assembly, located within the thawing chamber, is used to press the object-to-be-processed onto a sidewall having a second ultrasonic transducer.

[0013] As described above, in the thawing device, the pressing assembly for the object to be processed includes a pressure plate and a pressure applying device, wherein the pressure applying device is used to apply a force to the pressure plate toward the side wall where the second ultrasonic transducer is located.

[0014] In the defrosting device described above, the pressure-applying device is an elastic element.

[0015] The defrosting device as described above, the defrosting device comprising:

[0016] A pressure detection device is used to detect the pressure signal exerted on the workpiece by the workpiece pressing assembly.

[0017] The control module is configured to control the first ultrasonic transducer and the second ultrasonic transducer to generate ultrasonic waves when the pressure signal is greater than a set pressure value, and to control the second ultrasonic transducer not to generate ultrasonic waves and the first ultrasonic transducer to generate ultrasonic waves when the pressure signal is less than or equal to the set pressure value, or to control both the second ultrasonic transducer and the first ultrasonic transducer not to generate ultrasonic waves.

[0018] The defrosting device as described above, the defrosting device comprising:

[0019] A pressure detection device is used to detect the pressure signal exerted on the workpiece by the workpiece pressing assembly.

[0020] The control module is used to control the pressure application device to operate when the pressure signal is less than or equal to a set pressure value, so that the pressure signal is greater than the set pressure value; and to control the first ultrasonic transducer and the second ultrasonic transducer to generate ultrasonic waves when the pressure signal is greater than the set pressure value.

[0021] In the defrosting device described above, the pressure application device is an electric lifting device, a pneumatic lifting device, or a hydraulic lifting device.

[0022] In the defrosting device described above, the control module is used to control the first ultrasonic transducer and the second ultrasonic transducer to alternately generate ultrasonic waves when the pressure signal is greater than the set pressure.

[0023] The defrosting device as described above, the defrosting device comprising:

[0024] A temperature detection device, located on the bottom wall, is used to detect the temperature of the object to be processed;

[0025] The control module is used to control the first ultrasonic transducer and the second ultrasonic transducer to alternately generate ultrasonic waves when the temperature of the object to be processed is lower than the set temperature, and to control the first ultrasonic transducer and the second ultrasonic transducer to stop generating ultrasonic waves when the temperature of the object to be processed rises to the set temperature.

[0026] In the defrosting device described above, the control module is used to control the frequency of the first ultrasonic transducer and the second ultrasonic transducer to alternately generate ultrasonic waves according to the temperature of the object to be processed when the temperature of the object to be processed is lower than the set temperature.

[0027] In the thawing device described above, the temperature of the object to be treated is negatively correlated with the frequency of the ultrasonic waves alternately generated by the first and second ultrasonic transducers.

[0028] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The thawing device of the present invention includes a thawing chamber, a first ultrasonic transducer, a second ultrasonic transducer, and a material pressing assembly; the thawing chamber is used to place the material to be processed, and the thawing chamber includes a bottom wall and a side wall; the first ultrasonic transducer is located on the bottom wall; the second ultrasonic transducer is located on the side wall; the material pressing assembly is located in the thawing chamber and is used to press the material to be processed onto the side wall with the second ultrasonic transducer. The present invention provides ultrasonic transducers on both the bottom wall and the side wall of the thawing chamber, enabling a two-dimensional ultrasonic thawing mode for the material to be processed, greatly improving the thawing efficiency and uniformity, significantly improving the problem of juice loss, and maximizing the preservation of the nutritional components of the material; the present invention also uses the material pressing assembly to press the material to be processed onto the side wall with the ultrasonic transducer, making the material to be processed contact the side wall, effectively reducing the ultrasonic loss of the ultrasonic transducer on the side wall, and improving the thawing efficiency.

[0029] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of a thawing device according to a specific embodiment of the present invention.

[0032] Figure 2 This is a schematic diagram of the defrosting device according to a specific embodiment of the present invention.

[0033] Figure 3This is a control flowchart of a thawing device according to a specific embodiment of the present invention.

[0034] Figure 4 This is a schematic diagram of the thawing device according to a specific embodiment of the present invention.

[0035] Figure 5 This is a schematic diagram of the defrosting device according to a specific embodiment of the present invention.

[0036] Figure 6 This is a control flowchart of the thawing device according to a specific embodiment of the present invention.

[0037] In the picture,

[0038] 1. Thawing chamber;

[0039] 11. Bottom wall;

[0040] 12. Top wall;

[0041] 13. First sidewall;

[0042] 14. Second sidewall;

[0043] 15. Third sidewall;

[0044] 21. First ultrasonic transducer;

[0045] 22. Second ultrasonic transducer;

[0046] 31. Pressure plate;

[0047] 32. Pressure application device;

[0048] 4. Pressure detection device;

[0049] 5. Temperature detection device;

[0050] 6. Items to be processed. Detailed Implementation

[0051] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0052] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "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," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0054] In this embodiment, the ultrasonic defrosting device mainly features ultrasonic transducers on both the bottom and side walls of the defrosting chamber. These transducers create a two-dimensional ultrasonic defrosting pattern on the food being processed, significantly improving defrosting efficiency and uniformity, greatly reducing juice loss, and preserving the nutritional components to the maximum extent. Furthermore, experiments have shown that for ultrasound waves to reach the food itself, it must be in full contact with the container wall and exert sufficient pressure. Otherwise, the transmission of ultrasound waves will be greatly weakened. Therefore, this embodiment also uses a pressing assembly to press the food against the side wall with the ultrasonic transducers, ensuring contact between the food and the side wall, effectively reducing ultrasonic loss from the transducers on the side wall and improving defrosting efficiency.

[0055] The defrosting device is described in detail below through two examples:

[0056] Example 1

[0057] like Figure 1 , 2 As shown, the thawing device of this embodiment includes a thawing chamber 1, an ultrasonic transducer, and a pressing assembly for the object to be processed.

[0058] The defrosting device may further include a housing, a device door, and an ultrasonic generating module.

[0059] The shell contains a thawing chamber 1 for placing the object to be processed 6.

[0060] The thawing chamber 1 includes a bottom wall 11, a top wall 12, and side walls forming the chamber.

[0061] The sidewalls include a first sidewall 13 and a second sidewall 14, which are opposite each other, and a third sidewall 15 connecting the first sidewall 13, the second sidewall 14, the bottom wall 11 and the top wall 12.

[0062] The thawing chamber 1 has a loading and unloading port for the object to be processed, which is opposite to the third side wall 15. The device door can be set at the loading and unloading port of the thawing chamber 1 to open and close the loading and unloading port of the thawing chamber 1.

[0063] Of course, in other embodiments, the thawing chamber 1 may also have a top opening, that is, the loading and unloading port of the thawing chamber 1 is located on its top side, and the device door is located at the top opening. In this case, the thawing chamber 1 includes a bottom wall 11 forming the chamber and four side walls.

[0064] The ultrasonic generator module is used to generate ultrasonic signals (generally referring to sound wave signals with a frequency higher than 20kHz). The ultrasonic generator module is preferably located outside the housing for ease of maintenance.

[0065] The ultrasonic transducer includes at least one first ultrasonic transducer 21 located on the bottom wall 11 and at least one second ultrasonic transducer 22 located on the second side wall 14.

[0066] The ultrasonic transducer can be electrically connected to the ultrasonic generator module to generate corresponding ultrasonic waves in the thawing chamber 1 according to the ultrasonic signal, and thaw the object to be processed 6.

[0067] In this embodiment, the frequency of the ultrasonic signal is preferably 25-50kHz, such as 30kHz, 40kHz, or 45kHz. This frequency range has strong penetrating power, which can increase the thawing rate of the object to be treated 6 and make the internal and external temperatures of the object to be treated 6 uniform. The power of the ultrasonic signal is preferably 20-100W, such as 35W, 50W, or 70W, which allows the thawing device to achieve excellent thawing effect while having low energy consumption.

[0068] During the thawing process, the ultrasonic transducers on the bottom and side walls can generate ultrasonic waves in multiple directions to thaw the material to be processed 6 in the thawing chamber 1. Compared with thawing the material to be processed 6 using ultrasonic waves in a single direction, the thawing time is shortened and the temperature uniformity of the material to be processed 6 is improved.

[0069] The ultrasonic signal propagating in the direction of propagation may include axial wave signals and radial wave signals. The first ultrasonic transducer 21 is configured to generate axial vibrations based on the axial wave signal, thereby generating axial ultrasonic waves in the thawing chamber 1, and the second ultrasonic transducer 22 is configured to generate radial vibrations based on the radial wave signal, thereby generating radial ultrasonic waves in the thawing chamber 1.

[0070] In this embodiment, the axial ultrasonic wave is the ultrasonic wave generated by the first ultrasonic transducer 21 on the bottom wall 11 with a propagation direction perpendicular to the bottom wall 11, and the radial ultrasonic wave is the ultrasonic wave generated by the second ultrasonic transducer 22 on the second side wall 14 with a propagation direction parallel to the bottom wall 11.

[0071] During the thawing process, axial wave signals and radial wave signals are generated alternately, causing the ultrasonic transducer to generate axial and radial ultrasonic waves in the thawing chamber 1 accordingly. This not only avoids the phenomenon of interference and weakening of different sound waves, but also increases the energy density of sound waves transmitted in the object to be treated 6, generating beneficial irregular waves, further shortening the thawing time and improving the temperature uniformity of the object to be treated 6.

[0072] Testing revealed that if the object to be processed 6 does not contact the bottom or side wall where the ultrasonic transducer is located, or if the pressure is too low when they do contact, the ultrasonic loss will reach over 80%. To address this issue, this embodiment includes an object-pressing assembly within the thawing chamber 1 to press the object to be processed 6 against the second side wall 14 containing the second ultrasonic transducer 22, thereby reducing the ultrasonic loss of the second ultrasonic transducer 22. Additionally, the object to be processed 6 contacts the bottom wall 11 under the influence of gravity, further reducing the ultrasonic loss of the first ultrasonic transducer 21.

[0073] Specifically, the press-fit assembly includes a pressure plate 31 and a pressure applying device 32. The pressure applying device 32 applies a force to the pressure plate 31 in the direction toward the second sidewall 14 where the second ultrasonic transducer 22 is located. The pressure plate 31 can move within the thawing chamber 1 in a direction parallel to the bottom wall 11.

[0074] In this embodiment, the pressure-applying device is an elastic element located between the pressure plate 31 and the first side wall 13.

[0075] Preferably, the elastic element is at least one spring, with one end of the spring fixed to the first sidewall 13 and the other end of the spring fixed to the pressure plate 31.

[0076] When the object to be processed 6 is not placed in the thawing chamber 1, the spring is in an uncompressed state, and the pressure plate 31 is close to or in contact with the second side wall 14.

[0077] When the object to be processed 6 is placed into the thawing chamber 1, the pressure plate 31 moves toward the first side wall 13, the spring is in a compressed state, and the pressure plate 31 presses the object to be processed 6 onto the second side wall 14 under the action of the spring.

[0078] Furthermore, the defrosting device includes:

[0079] The pressure detection device 4 is used to detect the pressure signal of the material to be processed 6 from the material pressing assembly.

[0080] The pressure detection device 4 is located on the pressure plate 31.

[0081] The control module is used to control the first ultrasonic transducer 21 and the second ultrasonic transducer 22 to generate ultrasonic waves when the pressure signal is greater than the set pressure value, and to control the second ultrasonic transducer 22 not to generate ultrasonic waves and the first ultrasonic transducer 21 to generate ultrasonic waves when the pressure signal is less than or equal to the set pressure value, so as to avoid excessive loss of ultrasonic waves generated by the second ultrasonic transducer 22, and at the same time protect the second ultrasonic transducer 22 from damage and extend its service life.

[0082] Alternatively, if the pressure signal is less than or equal to the set pressure value, it indicates that the thickness of the food to be processed 6 is too thin and the food size is too small to be suitable for ultrasonic defrosting. In this case, the first ultrasonic transducer 21 and the second ultrasonic transducer 22 are controlled not to generate ultrasonic waves, and the defrosting device can indicate that natural air defrosting is sufficient.

[0083] Preferably, the control module is used to control the first ultrasonic transducer 21 and the second ultrasonic transducer 22 to alternately generate ultrasonic waves when the pressure signal is greater than the set pressure.

[0084] The control module outputs a control signal to the ultrasonic generator module, which is configured to alternately generate axial wave signals and radial wave signals during the thawing process.

[0085] During the thawing process, the duration of each axial wave signal generation is preferably 20–60 seconds, such as 25s, 30s, or 35s. The duration of each radial wave signal generation is preferably 10–60 seconds, such as 15s, 20s, 40s, or 50s. This allows the axial and radial ultrasonic waves to form suitable beneficial irregular waves, enhancing the thawing effect.

[0086] Furthermore, the defrosting device also includes:

[0087] Temperature detection device 5, located on the bottom wall 11, is used to detect the temperature of the object to be processed 6.

[0088] The control module is used to control the first ultrasonic transducer 21 and the second ultrasonic transducer 22 to alternately generate ultrasonic waves when the temperature of the object to be processed 6 is lower than the set temperature, and to control the first ultrasonic transducer 21 and the second ultrasonic transducer 22 to stop generating ultrasonic waves when the temperature of the object to be processed 6 rises to the set temperature. When the temperature of the object to be processed 6 rises to the set temperature, it indicates that thawing is complete, and the generation of ultrasonic waves will automatically stop and a prompt will be issued.

[0089] The control module is used to control the frequency of ultrasonic waves generated alternately by the first ultrasonic transducer 21 and the second ultrasonic transducer 22 according to the temperature of the object to be processed 6 when the temperature is lower than the set temperature.

[0090] Preferably, the temperature of the object to be treated 6 is negatively correlated with the frequency of the ultrasonic waves alternately generated by the first ultrasonic transducer 21 and the second ultrasonic transducer 22. That is, the lower the temperature of the object to be treated 6, the higher the frequency of the ultrasonic waves alternately generated by the first ultrasonic transducer 21 and the second ultrasonic transducer 22, and the higher the temperature of the object to be treated 6, the lower the frequency of the ultrasonic waves alternately generated by the first ultrasonic transducer 21 and the second ultrasonic transducer 22, so as to improve the uniformity of the thawing process.

[0091] like Figure 3 As shown, the defrosting device operates according to the following procedure:

[0092] S1. Place the object to be processed in the thawing chamber between the second side wall and the pressure plate, and begin thawing.

[0093] S2. The temperature detection device detects the temperature of the object to be processed; the pressure detection device detects the pressure signal of the object to be processed.

[0094] S3. If the control module determines that the temperature of the object to be processed is lower than the set temperature, proceed to step S4; otherwise, proceed to step S6.

[0095] S4. If the control module determines that the pressure signal of the object to be processed is greater than the set pressure value, proceed to step S5; otherwise, proceed to step S7.

[0096] S5. Control the first ultrasonic transducer and the second ultrasonic transducer to alternately generate ultrasonic waves, and proceed to step S2.

[0097] S6. Control the first and second ultrasonic transducers to stop generating ultrasonic waves and issue a prompt.

[0098] S7. The control module controls the second ultrasonic transducer to not generate ultrasonic waves, while the first ultrasonic transducer generates ultrasonic waves. Alternatively, it controls both the second and first ultrasonic transducers to not generate ultrasonic waves, issuing a prompt indicating that the object to be treated does not require ultrasonic thawing and can thaw naturally. Proceed to step S2.

[0099] Example 2

[0100] like Figure 4 , 5 As shown, the thawing device of this embodiment includes a thawing chamber 1, an ultrasonic transducer, and a pressing assembly for the object to be processed.

[0101] The defrosting device may further include a housing, a device door, and an ultrasonic generating module.

[0102] The shell contains a thawing chamber 1 for placing the object to be processed 6.

[0103] The thawing chamber 1 includes a bottom wall 11, a top wall 12, and side walls forming the chamber.

[0104] The sidewalls include a first sidewall 13 and a second sidewall 14, which are opposite each other, and a third sidewall 15 connecting the first sidewall 13, the second sidewall 14, the bottom wall 11 and the top wall 12.

[0105] The thawing chamber 1 has a loading and unloading port for the object to be processed, which is opposite to the third side wall 15. The device door can be set at the loading and unloading port of the thawing chamber 1 to open and close the loading and unloading port of the thawing chamber 1.

[0106] Of course, in other embodiments, the thawing chamber 1 may also have a top opening, that is, the loading and unloading port of the thawing chamber 1 is located on its top side, and the device door is located at the top opening. In this case, the thawing chamber 1 includes a bottom wall 11 forming the chamber and four side walls.

[0107] The ultrasonic generator module is used to generate ultrasonic signals (generally referring to sound wave signals with a frequency higher than 20kHz). The ultrasonic generator module is preferably located outside the housing for ease of maintenance.

[0108] The ultrasonic transducer includes at least one first ultrasonic transducer 21 located on the bottom wall 11 and at least one second ultrasonic transducer 22 located on the second side wall 14.

[0109] The ultrasonic transducer can be electrically connected to the ultrasonic generator module to generate corresponding ultrasonic waves in the thawing chamber 1 according to the ultrasonic signal, and thaw the object to be processed 6.

[0110] In this embodiment, the frequency of the ultrasonic signal is preferably 25-50kHz, such as 30kHz, 40kHz, or 45kHz. This frequency range has strong penetrating power, which can increase the thawing rate of the object to be treated 6 and make the internal and external temperatures of the object to be treated 6 uniform. The power of the ultrasonic signal is preferably 20-100W, such as 35W, 50W, or 70W, which allows the thawing device to achieve excellent thawing effect while having low energy consumption.

[0111] During the thawing process, the ultrasonic transducers on the bottom and side walls can generate ultrasonic waves in multiple directions to thaw the material to be processed 6 in the thawing chamber 1. Compared with thawing the material to be processed 6 using ultrasonic waves in a single direction, the thawing time is shortened and the temperature uniformity of the material to be processed 6 is improved.

[0112] The ultrasonic signal propagating in the direction of propagation may include axial wave signals and radial wave signals. The first ultrasonic transducer 21 is configured to generate axial vibrations based on the axial wave signal, thereby generating axial ultrasonic waves in the thawing chamber 1, and the second ultrasonic transducer 22 is configured to generate radial vibrations based on the radial wave signal, thereby generating radial ultrasonic waves in the thawing chamber 1.

[0113] In this embodiment, the axial ultrasonic wave is the ultrasonic wave generated by the first ultrasonic transducer 21 on the bottom wall 11 with a propagation direction perpendicular to the bottom wall 11, and the radial ultrasonic wave is the ultrasonic wave generated by the second ultrasonic transducer 22 on the second side wall 14 with a propagation direction parallel to the bottom wall 11.

[0114] During the thawing process, axial wave signals and radial wave signals are generated alternately, causing the ultrasonic transducer to generate axial and radial ultrasonic waves in the thawing chamber 1 accordingly. This not only avoids the phenomenon of interference and weakening of different sound waves, but also increases the energy density of sound waves transmitted in the object to be treated 6, generating beneficial irregular waves, further shortening the thawing time and improving the temperature uniformity of the object to be treated 6.

[0115] Testing revealed that if the object to be processed 6 does not contact the bottom or side wall where the ultrasonic transducer is located, or if the pressure is too low when they do contact, the ultrasonic loss will reach over 80%. To address this issue, this embodiment includes an object-pressing assembly within the thawing chamber 1 to press the object to be processed 6 against the second side wall 14 containing the second ultrasonic transducer 22, thereby reducing the ultrasonic loss of the second ultrasonic transducer 22. Additionally, the object to be processed 6 contacts the bottom wall 11 under the influence of gravity, further reducing the ultrasonic loss of the first ultrasonic transducer 21.

[0116] Specifically, the press-fit assembly includes a pressure plate 31 and a pressure applying device 32. The pressure applying device 32 applies a force to the pressure plate 31 in the direction toward the second sidewall 14 where the second ultrasonic transducer 22 is located. The pressure plate 31 can move within the thawing chamber 1 in a direction parallel to the bottom wall 11.

[0117] In this embodiment, the pressure device 32 is a lifting device located between the pressure plate 31 and the first side wall 13.

[0118] The lifting device can be an electric lifting device, a pneumatic lifting device, or a hydraulic lifting device.

[0119] The electric lifting device may include a motor, a gear, and a rack. One end of the rack is fixed to the pressure plate 31. The rack can move horizontally within the thawing chamber 1. A bushing may be installed within the thawing chamber 1, and the rack is located within the bushing and can move relative to the bushing. When the motor rotates forward, it drives the gear to rotate forward, which in turn drives the rack to move towards the second side wall 14, thereby moving the pressure plate 31 towards the second side wall 14. When the motor rotates in the reverse direction, it drives the gear to rotate in the reverse direction, which in turn drives the rack to move towards the first side wall 13, thereby moving the pressure plate 31 towards the first side wall 13.

[0120] The pneumatic lifting device may include a cylinder, one end of which is fixed to the pressure plate 31 and the other end is fixed to the first side wall 13. When the piston rod of the cylinder extends, it causes the pressure plate 31 to move toward the second side wall 14; when the piston rod of the cylinder retracts, it causes the pressure plate 31 to move toward the first side wall 13.

[0121] The hydraulic lifting device may include a hydraulic cylinder, one end of which is fixed to the pressure plate 31 and the other end is fixed to the first side wall 13. When the piston rod of the hydraulic cylinder extends, it causes the pressure plate 31 to move toward the second side wall 14; when the piston rod of the hydraulic cylinder retracts, it causes the pressure plate 31 to move toward the first side wall 13.

[0122] Before the object to be processed 6 is placed into the thawing chamber 1, the lifting device moves the pressure plate 31 away from the second side wall 14, so that a space for placing the object to be processed 6 is formed between the second side wall 14 and the pressure plate 31.

[0123] After the object to be processed 6 is placed into the thawing chamber 1, the lifting device moves the pressure plate 31 toward the second side wall 14. Under the action of the lifting device, the pressure plate 31 presses the object to be processed 6 onto the second side wall 14.

[0124] Furthermore, the defrosting device includes:

[0125] The pressure detection device 4 is used to detect the pressure signal of the material to be processed 6 from the material pressing assembly.

[0126] The pressure detection device 4 is located on the pressure plate 31.

[0127] The control module is used to control the first ultrasonic transducer 21 and the second ultrasonic transducer 22 to generate ultrasonic waves when the pressure signal is greater than the set pressure value, and to control the pressure application device 32 to operate when the pressure signal is less than or equal to the set pressure value, so as to make the pressure signal greater than the set pressure value, so as to avoid excessive loss of ultrasonic waves generated by the second ultrasonic transducer 22, and at the same time protect the second ultrasonic transducer 22 from damage and extend its service life.

[0128] Preferably, the control module is used to control the first ultrasonic transducer 21 and the second ultrasonic transducer 22 to alternately generate ultrasonic waves when the pressure signal is greater than the set pressure.

[0129] The control module outputs a control signal to the ultrasonic generator module, which is configured to alternately generate axial wave signals and radial wave signals during the thawing process.

[0130] During the thawing process, the duration of each axial wave signal generation is preferably 20–60 seconds, such as 25s, 30s, or 35s. The duration of each radial wave signal generation is preferably 10–60 seconds, such as 15s, 20s, 40s, or 50s. This allows the axial and radial ultrasonic waves to form suitable beneficial irregular waves, enhancing the thawing effect.

[0131] Furthermore, the defrosting device also includes:

[0132] Temperature detection device 5, located on the bottom wall 11, is used to detect the temperature of the object to be processed 6.

[0133] The control module is used to control the first ultrasonic transducer 21 and the second ultrasonic transducer 22 to alternately generate ultrasonic waves when the temperature of the object to be processed 6 is lower than the set temperature, and to control the first ultrasonic transducer 21 and the second ultrasonic transducer 22 to stop generating ultrasonic waves when the temperature of the object to be processed 6 rises to the set temperature. When the temperature of the object to be processed 6 rises to the set temperature, it indicates that thawing is complete, and the generation of ultrasonic waves will automatically stop and a prompt will be issued.

[0134] The control module is used to control the frequency of the first ultrasonic transducer and the second ultrasonic transducer to alternately generate ultrasonic waves according to the temperature of the object to be processed 6 when the temperature of the object to be processed 6 is lower than the set temperature.

[0135] Preferably, the temperature of the object to be treated 6 is negatively correlated with the frequency of the ultrasonic waves alternately generated by the first ultrasonic transducer 21 and the second ultrasonic transducer 22. That is, the lower the temperature of the object to be treated 6, the higher the frequency of the ultrasonic waves alternately generated by the first ultrasonic transducer 21 and the second ultrasonic transducer 22, and the higher the temperature of the object to be treated 6, the lower the frequency of the ultrasonic waves alternately generated by the first ultrasonic transducer 21 and the second ultrasonic transducer 22, so as to improve the uniformity of the thawing process.

[0136] like Figure 6 As shown, the defrosting device operates according to the following procedure:

[0137] S1. Place the object to be processed in the thawing chamber between the second side wall and the pressure plate, and begin thawing.

[0138] S2. The temperature detection device detects the temperature of the object to be processed; the pressure detection device detects the pressure signal of the object to be processed.

[0139] S3. If the control module determines that the temperature of the object to be processed is lower than the set temperature, proceed to step S4; otherwise, proceed to step S6.

[0140] S4. If the control module determines that the pressure signal of the object to be processed is greater than the set pressure value, proceed to step S5; otherwise, proceed to step S7.

[0141] S5. Control the first ultrasonic transducer and the second ultrasonic transducer to alternately generate ultrasonic waves, and proceed to step S2.

[0142] S6. Control the first and second ultrasonic transducers to stop generating ultrasonic waves and issue a prompt.

[0143] S7. The control module controls the pressure application device to operate so that the pressure signal is greater than the set pressure value. Proceed to step S5.

[0144] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A defrosting device, characterized in that, include: A thawing chamber for placing the object to be processed, the thawing chamber including a bottom wall and side walls; The first ultrasonic transducer is located on the bottom wall; The second ultrasonic transducer is located on the side wall; The object pressing assembly, located within the thawing chamber, is used to press the object to be processed onto the sidewall having a second ultrasonic transducer; The press-fit assembly for the object to be processed includes a pressure plate and a pressure application device, wherein the pressure application device is used to apply a force to the pressure plate toward the side wall where the second ultrasonic transducer is located; A pressure detection device is used to detect the pressure signal exerted on the workpiece by the workpiece pressing assembly. The control module is configured to control the first ultrasonic transducer and the second ultrasonic transducer to generate ultrasonic waves when the pressure signal is greater than a set pressure value, and to control the second ultrasonic transducer not to generate ultrasonic waves and the first ultrasonic transducer to generate ultrasonic waves when the pressure signal is less than or equal to the set pressure value, or to control both the second ultrasonic transducer and the first ultrasonic transducer not to generate ultrasonic waves.

2. The defrosting device according to claim 1, characterized in that, The pressure-applying device is an elastic element.

3. The defrosting device according to claim 1, characterized in that, The control module is used to control the pressure application device to operate when the pressure signal is less than or equal to a set pressure value, so that the pressure signal is greater than the set pressure value; and to control the first ultrasonic transducer and the second ultrasonic transducer to generate ultrasonic waves when the pressure signal is greater than the set pressure value.

4. The defrosting device according to claim 3, characterized in that, The pressure application device is an electric lifting device, a pneumatic lifting device, or a hydraulic lifting device.

5. The defrosting device according to claim 1 or 3, characterized in that, The control module is used to control the first ultrasonic transducer and the second ultrasonic transducer to alternately generate ultrasonic waves when the pressure signal is greater than the set pressure.

6. The defrosting apparatus according to claim 1 or 3, characterized in that, The defrosting device includes: A temperature detection device, located on the bottom wall, is used to detect the temperature of the object to be processed; The control module is used to control the first ultrasonic transducer and the second ultrasonic transducer to alternately generate ultrasonic waves when the temperature of the object to be processed is lower than the set temperature, and to control the first ultrasonic transducer and the second ultrasonic transducer to stop generating ultrasonic waves when the temperature of the object to be processed rises to the set temperature.

7. The defrosting device according to claim 6, characterized in that, The control module is used to control the frequency of alternating ultrasonic waves generated by the first ultrasonic transducer and the second ultrasonic transducer according to the temperature of the object to be processed when the temperature of the object to be processed is lower than the set temperature.

8. The defrosting device according to claim 7, characterized in that, The temperature of the object to be processed is negatively correlated with the frequency of the ultrasonic waves alternately generated by the first and second ultrasonic transducers.

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