Unfreezing device and refrigerator

Abstract

The utility model provides an unfreezing device and a refrigerator, the unfreezing device comprises a cavity, an unfreezing plate and an air supply assembly, and the unfreezing plate is arranged at the bottom of the cavity; the air supply assembly is arranged at the top of the cavity, and the air supply assembly is configured in the mode that air of the air supply assembly moves towards the unfreezing plate along the inner wall side of the cavity and flows back to the air supply assembly from the bottom of the cavity, the air flows to the unfreezing plate along the inner wall side of the cavity, so that objects on the unfreezing plate make large-range contact with the air, and after air flow reaches the unfreezing plate, the objects on the unfreezing plate are unfrozen. Air flows from the periphery of the unfreezing plate to the middle of the unfreezing plate and flows back to the air supply assembly from the middle of the unfreezing plate through the middle of the cavity, heat exchange occurs between the air and objects on the unfreezing plate, the unfreezing efficiency is improved, the convection effect of the air is enhanced, and the unfreezing speed is increased; the surface of an object on the unfreezing plate is unfrozen uniformly, the phenomenon that the local temperature is too high is avoided, and the unfreezing quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerators, in particular to a thawing device and a refrigerator. Background Art

[0002] Frozen storage is currently the most widely used method for meat storage and preservation. Frozen meat generally needs to be thawed before it can be cooked. During the thawing process, due to differences in environmental conditions and processing methods, meat products are prone to a decline in physical, chemical and sensory quality, such as juice loss, protein denaturation, fat oxidation, odor deterioration, etc. At present, there are various thawing methods, including traditional air, water (cold / hot, static / flowing), refrigerated thawing, etc., as well as some new thawing methods such as microwave, radio frequency, ultrasound, high-voltage electrostatic field, etc. These thawing methods have the disadvantages of slow thawing speed, poor thawing quality, uncontrollable thawing endpoint, and high cost. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of slow thawing speed and poor thawing quality in the prior art, and to provide a thawing device and a refrigerator.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A thawing device comprises a cavity, a thawing plate and an air supply assembly, wherein the thawing plate is arranged at the bottom of the cavity; the air supply assembly is arranged at the top of the cavity, and the air supply assembly is configured as follows: the wind of the air supply assembly moves along the inner wall side of the cavity toward the thawing plate, and flows back to the air supply assembly from the bottom of the cavity.

[0006] In the present scheme, wind flows along the inner wall side of the cavity to the thawing plate, so that the objects on the thawing plate are in contact with the wind over a large area. After reaching the thawing plate, the wind will flow from the four sides of the thawing plate to the middle of the thawing plate, and from the middle of the thawing plate through the middle of the cavity back to the air supply component. The wind exchanges heat with the objects on the thawing plate, thereby improving the thawing efficiency, strengthening the convection effect of the wind, and increasing the thawing speed. Since the wind flows to the thawing plate from all sides, the surface of the objects on the thawing plate is thawed evenly, and there will be no local overtemperature phenomenon, thereby improving the thawing quality.

[0007] Preferably, the air supply assembly further comprises a lower plate, the lower plate is provided with an air outlet and an air inlet, the air inlet is provided in the middle of the lower plate, and the air outlets are evenly distributed along the circumference of the lower plate;

[0008] Wherein, the wind of the air supply component flows into the cavity from the air outlet, and flows into the air supply component from the air inlet.

[0009] In this solution, the air inlet is set in the middle of the lower plate, and the air outlet is evenly distributed along the circumference of the lower plate, so that the airflow can flow evenly from the air outlet into the cavity, thereby ensuring that the meat can be evenly exposed to the wind during the thawing process, improving the uniformity of thawing. After the air from the air supply component flows into the cavity from the air outlet, it flows into the air supply component through the air inlet, utilizing the principle of air circulation, realizing the recycling of air, improving the utilization rate of air, and reducing energy consumption and cost.

[0010] Preferably, the air supply assembly further comprises a heat insulating member, the heat insulating member is arranged on the lower plate, a mounting groove and an air duct groove are arranged in the heat insulating member, the mounting groove is connected to the air duct groove,

[0011] The air outlet is arranged opposite to the air duct groove, and the installation groove is arranged opposite to the air inlet.

[0012] In this solution, the installation groove is connected to the air duct groove to form an air flow channel, and the air outlet and the air duct groove are arranged relative to each other, so that the air flow can flow smoothly from the air outlet into the cavity. At the same time, the installation groove and the air inlet are arranged relative to each other, so that the air flow can smoothly flow back from the cavity to the air supply component. By introducing the heat insulation component, the heat insulation performance of the thawing device is enhanced, and the heat transfer is effectively blocked, thereby maintaining the temperature in the cavity stable, preventing the quality of meat from being affected by temperature fluctuations during the thawing process.

[0013] Preferably, the air supply assembly further comprises a cover plate, wherein the cover plate and the lower plate enclose a heat insulation cavity, and the heat insulation element is arranged in the heat insulation cavity; and / or,

[0014] The diameter of the air outlet becomes smaller along the direction toward the cavity.

[0015] In the present solution, the thermal insulation element is disposed in the thermal insulation cavity, which enhances the thermal insulation effect of the thermal insulation element, because the thermal insulation element is completely surrounded by the thermal insulation cavity, which can more effectively prevent heat transfer.

[0016] The smaller the diameter of the air outlet, the more concentrated the wind can be, which improves the directionality of the wind to the thawing parts and prevents the wind from flowing out from the air inlet before reaching the bottom of the thawing plate, thereby improving the thawing efficiency.

[0017] Preferably, the air supply assembly further comprises a fan, the fan is arranged in the mounting groove, and the air inlet channel of the fan is arranged opposite to the air inlet.

[0018] In this solution, the ventilation function of the fan ensures that the wind flow smoothly enters the air supply component from the air inlet, providing sufficient air volume for the thawing process. At the same time, the air inlet channel of the fan is arranged relative to the air inlet, which can accelerate the flow of wind flow, thereby accelerating the thawing process.

[0019] Preferably, the lower plate has a recessed portion sunken toward the interior of the cavity, and the air outlet is arranged on the recessed portion.

[0020] In this solution, the air outlet is arranged in the recessed portion, which can better guide the wind flow out from the lower plate, so that the wind flow flows more concentratedly to the thawing part, thereby improving the uniformity of thawing and improving the thawing effect.

[0021] Preferably, the air supply assembly further comprises a buffer, wherein the buffer is arranged between the fan and the lower plate; and / or,

[0022] The shape of the heat insulating member corresponds to the shape of the lower plate, and the thickness of the heat insulating member at the installation groove and the air duct groove is greater than the thickness of the end portion of the heat insulating member.

[0023] In this solution, the buffer is arranged between the fan and the lower plate. This design can effectively reduce the impact of the wind flow on the lower plate, protect the lower plate from damage, and also reduce the generation of noise, thereby improving the stability and service life of the thawing device.

[0024] Since the thickness of the thermal insulation component in the installation groove and the air duct groove is larger, it can better adapt to the shape of the lower plate, ensure a close fit between the thermal insulation component and the lower plate, reduce heat transfer and loss, enhance its rigidity and strength, prevent the thermal insulation component from deformation or damage when subjected to thermal shock or external pressure, and improve the service life and reliability of the thermal insulation component.

[0025] Preferably, the air supply assembly also includes at least one of a resistance wire, a PTC heating module, or an ultrasonic atomization humidification module.

[0026] In this solution, the resistance wire can provide additional heat to assist in thawing or speed up the thawing process. By adjusting the power of the resistance wire, the temperature and speed of thawing can be precisely controlled to meet the needs of different ingredients and users. The PTC heating module has the characteristics of constant temperature heating, and can automatically adjust the power after reaching the set temperature to prevent overheating. This helps to maintain a stable thawing temperature and avoid excessive heating or local overheating of the ingredients. The ultrasonic atomization humidification module can refine water molecules into tiny droplets, blow these droplets to the thawing area through wind flow, and increase the humidity of the thawing environment. This is particularly effective for thawing dry or ice-crystal-prone ingredients, and can reduce the formation of ice crystals on the surface of the ingredients and the loss of moisture in the ingredients.

[0027] Preferably, the thawing device further comprises a drawer, wherein the drawer is arranged in the cavity, the thawing plate is also arranged in the drawer, and the drawer is movable relative to the cavity.

[0028] In this solution, the design of the drawer makes it easy to put in and take out the thawing plate and food, reducing the difficulty of use and the cleaning burden of the user. At the same time, since the drawer can move relative to the cavity, the user can flexibly adjust the position of the thawing plate and food as needed to achieve a better thawing effect.

[0029] A refrigerator comprises the thawing device as described above.

[0030] In the present scheme, wind flows along the inner wall side of the cavity to the thawing plate, so that the objects on the thawing plate are in contact with the wind over a large area. After reaching the thawing plate, the wind will flow from the four sides of the thawing plate to the middle of the thawing plate, and from the middle of the thawing plate through the middle of the cavity back to the air supply component. The wind exchanges heat with the objects on the thawing plate, thereby improving the thawing efficiency, strengthening the convection effect of the wind, and increasing the thawing speed. Since the wind flows to the thawing plate from all sides, the surface of the objects on the thawing plate is thawed evenly, and there will be no local overtemperature phenomenon, thereby improving the thawing quality.

[0031] On the basis of conforming to the common sense in the art, the above preferred technical solutions can be freely combined to obtain the preferred embodiments of the present application.

[0032] The positive progressive effect of the utility model is that the wind flows along the inner wall side of the cavity to the thawing plate, so that the objects on the thawing plate are in contact with the wind over a large area. After reaching the thawing plate, the wind will flow from the four sides of the thawing plate to the middle of the thawing plate, and from the middle of the thawing plate through the middle of the cavity back to the air supply component. The wind exchanges heat with the objects on the thawing plate, thereby improving the thawing efficiency, strengthening the convection effect of the wind, and increasing the thawing speed. Since the wind flows to the thawing plate from the four sides, the surface of the objects on the thawing plate is thawed evenly, and there will be no local overtemperature phenomenon, thereby improving the thawing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The figure is a three-dimensional structural schematic diagram of a refrigerator according to an embodiment of the utility model.

[0034] Figure 2 It is a front view cross-sectional structural schematic diagram of a refrigerator according to an embodiment of the utility model.

[0035] Figure 3 It is a schematic cross-sectional structure diagram of a thawing device according to an embodiment of the utility model.

[0036] Figure 4 The figure is a schematic cross-sectional structural diagram of a heat insulating member according to an embodiment of the present utility model.

[0037] Figure 5 The figure is a schematic top view of the structure of a heat insulating member according to an embodiment of the utility model.

[0038] Figure 6It is a side structural schematic diagram of a heat insulation component according to an embodiment of the utility model.

[0039] Figure 7 The figure is a schematic diagram of the top view of the lower plate of one embodiment of the utility model.

[0040] Figure 8 A side view of the lower plate of an embodiment of the utility model

[0041] Description of Reference Numerals

[0042] Thawing device 100

[0043] Cavity 10

[0044] Thawing plate 20

[0045] Air supply component 30

[0046] Lower plate 31

[0047] Air outlet 311

[0048] Air Inlet 312

[0049] Recess 313

[0050] Thermal insulation 32

[0051] Mounting groove 321

[0052] Air duct groove 322

[0053] Fan 33

[0054] Cover 40

[0055] Buffer 50

[0056] Drawer 60

[0057] Refrigerator 200

[0058] Upper door 201

[0059] Lower door 202

[0060] Cold room 203

[0061] Freezer 204 DETAILED DESCRIPTION

[0062] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0063] This embodiment provides a thawing device 100, such as Figure 1-Figure 8As shown, the thawing device 100 includes a cavity 10, a thawing plate 20 and an air supply assembly 30. The thawing plate 20 is arranged at the bottom of the cavity 10; the air supply assembly 30 is arranged at the top of the cavity 10, and the air supply assembly 30 is configured as follows: the wind of the air supply assembly 30 moves along the inner wall side of the cavity 10 toward the thawing plate 20, and flows back to the air supply assembly 30 from the bottom of the cavity 10.

[0064] The wind flows along the inner wall side of the cavity 10 to the thawing plate 20, so that the objects on the thawing plate 20 are in contact with the wind over a large area. After reaching the thawing plate 20, the wind will flow from the surrounding areas of the thawing plate 20 to the middle of the thawing plate 20, and from the middle of the thawing plate 20 through the middle of the cavity 10 back to the air supply component 30. The wind exchanges heat with the objects on the thawing plate 20, thereby improving the thawing efficiency, strengthening the convection effect of the wind, and increasing the thawing speed. Since the wind flows to the thawing plate 20 from all sides, the surface of the objects on the thawing plate 20 is thawed evenly, and there will be no local overtemperature phenomenon, thereby improving the thawing quality.

[0065] The air supply assembly 30 also includes a lower plate 31, which is provided with an air outlet 311 and an air inlet 312. The air inlet 312 is provided in the middle of the lower plate 31, and the air outlet 311 is evenly distributed along the circumference of the lower plate 31; the wind of the air supply assembly 30 flows into the cavity 10 from the air outlet 311, and flows into the air supply assembly 30 from the air inlet 312. The wind can flow evenly from the air outlet 311 into the cavity 10, thereby ensuring that the meat can be evenly exposed to the wind during the thawing process, and improving the uniformity of thawing. After the wind of the air supply assembly 30 flows into the cavity 10 from the air outlet 311, it flows into the air supply assembly 30 through the air inlet 312, utilizing the principle of wind circulation, realizing the recycling of wind, improving the utilization rate of wind, and reducing energy consumption and cost.

[0066] Among them, Figure 3 As shown, the air supply assembly 30 also includes a heat insulating member 32, which is arranged on the lower plate 31, and a mounting groove 321 and an air duct groove 322 are arranged in the heat insulating member 32, the mounting groove 321 is connected to the air duct groove 322, the air outlet 311 is arranged opposite to the air duct groove 322, and the mounting groove 321 is arranged opposite to the air inlet 312. The mounting groove 321 is connected to the air duct groove 322 to form an air flow channel, and the air outlet 311 is arranged opposite to the air duct groove 322, so that the wind can flow smoothly from the air outlet 311 into the cavity 10. At the same time, the mounting groove 321 is arranged opposite to the air inlet 312, so that the wind can flow smoothly from the cavity 10 back to the air supply assembly 30. By introducing the heat insulating member 32, the heat insulation performance of the thawing device 100 is enhanced, and the heat transfer is effectively blocked, so as to keep the temperature in the cavity 10 stable, and prevent the meat from being affected by temperature fluctuations during the thawing process.

[0067] Among them, Figure 3As shown, the air supply assembly 30 also includes a cover plate 40, which together with the lower plate 31 forms an insulation cavity, and the insulation member 32 is arranged in the insulation cavity; in this embodiment, the insulation member 32 is arranged in the insulation cavity, which enhances the insulation effect of the insulation member 32, because the insulation member 32 is completely surrounded in the insulation cavity, which can more effectively prevent heat transfer.

[0068] Among them, the heat insulation part 32 is a foam board, which is arranged between the cover plate 40 and the lower plate 31. The fan 33 is interference fit with the groove in the foam board. There is a gasket between the bottom surface of the fan 33 and the lower plate 31 for vibration reduction; the gasket is circular, and the inner hole of the gasket is aligned with the air inlet 312 of the fan 33 to facilitate the air intake of the fan 33.

[0069] The diameter of the air outlet 311 becomes smaller along the direction toward the cavity 10. The smaller diameter of the air outlet 311 can guide the wind flow to flow more concentratedly toward the thawing plate 20, and the blown wind is more concentrated, which improves the directionality of the wind flow to the thawing part and prevents the wind flow from flowing out from the air inlet 312 without reaching the bottom of the thawing plate 20 during the flow, thereby improving the thawing efficiency.

[0070] Specifically, Figure 3 As shown, the air supply assembly 30 further includes a fan 33, which is disposed in the mounting groove 321, and the air inlet channel of the fan 33 is disposed opposite to the air inlet 312. The ventilation function of the fan 33 ensures that the air flow smoothly enters the air supply assembly 30 from the air inlet 312, thereby providing sufficient air volume for the thawing process. At the same time, the air inlet channel of the fan 33 is disposed opposite to the air inlet 312, which can accelerate the flow of the air flow, thereby accelerating the thawing process.

[0071] The fan 33 is a volute-type centrifugal fan 33, which has a large outlet pressure. The structure of the flow channel and the air outlet 311 can ensure that the wind at the air outlet 311 can be blown to the bottom of the drawer 60. The fan 33 is installed in the foam board, and its high noise can be well reduced. The fan 33 is small in size and low in cost, which further reduces the space and cost requirements.

[0072] Among them, Figure 7 , Figure 8 As shown, the lower plate 31 has a recess 313 sunken into the cavity 10, and the air outlet 311 is arranged on the recess 313, which can better guide the wind flow out of the lower plate 31, so that the wind flow flows more concentratedly to the thawing part, thereby improving the uniformity of thawing and improving the thawing effect.

[0073] The air supply assembly 30 further includes a buffer 50, which is disposed between the fan 33 and the lower plate 31; the buffer 50 is disposed between the fan 33 and the lower plate 31. This design can effectively reduce the impact of the wind flow on the lower plate 31, protect the lower plate 31 from damage, and reduce the generation of noise, thereby improving the stability and service life of the thawing device 100.

[0074] like Figure 4-Figure 6 As shown, the shape of the thermal insulation 32 corresponds to the shape of the lower plate 31, and the thickness of the thermal insulation 32 at the installation groove 321 and the air duct groove 322 is greater than the thickness at the end of the thermal insulation 32. Since the thickness of the thermal insulation 32 at the installation groove 321 and the air duct groove 322 is greater, it can better adapt to the shape of the lower plate 31, ensure the close fit between the thermal insulation 32 and the lower plate 31, reduce heat transfer and loss, enhance its rigidity and strength, prevent the thermal insulation 32 from deformation or damage when subjected to thermal shock or external pressure, and improve the service life and reliability of the thermal insulation 32.

[0075] In a preferred embodiment, the air supply component 30 also includes at least one of a resistance wire or a PTC heating module or an ultrasonic atomization humidification module. The resistance wire can provide additional heat to assist in thawing or accelerate the thawing process. By adjusting the power of the resistance wire, the temperature and speed of thawing can be accurately controlled to meet the needs of different ingredients and users. The PTC heating module has the characteristics of constant temperature heating, and can automatically adjust the power after reaching the set temperature to prevent overheating. This helps to maintain the stability of the thawing temperature and avoid excessive heating or local overheating of the ingredients. The ultrasonic atomization humidification module can refine water molecules into tiny droplets, blow these droplets to the thawing area through wind flow, and increase the humidity of the thawing environment. This is particularly effective for thawing dry or ice-crystal-prone ingredients, and can reduce the formation of ice crystals on the surface of the ingredients and the loss of moisture in the ingredients.

[0076] Among them, Figure 3 As shown, the thawing device 100 further includes a drawer 60, which is disposed in the cavity 10, and the thawing plate 20 is also disposed in the drawer 60. The drawer 60 can move relative to the cavity 10. The design of the drawer 60 allows the thawing plate 20 and food to be easily put in and taken out, reducing the user's usage difficulty and cleaning burden. At the same time, since the drawer 60 can move relative to the cavity 10, the user can flexibly adjust the position of the thawing plate 20 and food as needed to achieve a better thawing effect.

[0077] When used, the temperature field around the food is destroyed by the wind field, the heat exchange coefficient is increased, and the thawing plate 20 has multiple functions of efficient heat conduction to quickly thaw the food; at the same time, when thawing in the variable temperature room of the refrigerator 200, the user can only adjust the temperature in the cavity 10, and at the same time adjust the thawing speed of the food, the thawing end point of the food can also be controlled, so that the thawed food is moderately soft and hard, which is convenient for subsequent processing. In addition, the thawing device 100 can be used alone outside the refrigerator 200, and it can also play the function of accelerating the thawing of food.

[0078] The thawing technology has high thawing efficiency, good thawing quality, controllable thawing end point, low cost, low noise, low power, safety, reliability, and can be well migrated and applied in the refrigerator 200; the thawing related parts have strong adaptability and do not affect other structures of the refrigerator 200. If other series refrigerators 200 do not have this thawing function, the fan 33 can be installed without replacing other parts, which is convenient for production, maintenance, and management. The existence and operation of the thawing function will not have a negative impact on the original variable temperature room function in the refrigerator 200.

[0079] This embodiment also provides a refrigerator 200, such as Figure 1 , Figure 2 As shown, the refrigerator 200 includes the above-mentioned thawing device 100, and the wind flows along the inner wall side of the cavity 10 to the thawing plate 20, so that the objects on the thawing plate 20 are in contact with the wind in a large range. After reaching the thawing plate 20, the wind will flow from the surroundings of the thawing plate 20 to the middle of the thawing plate 20, and from the middle of the thawing plate 20 through the middle of the cavity 10 to the air supply component 30. The wind exchanges heat with the objects on the thawing plate 20, thereby improving the thawing efficiency, strengthening the convection effect of the wind, and increasing the thawing speed. Since the wind flows to the thawing plate 20 from the surroundings, the surface of the objects on the thawing plate 20 is thawed evenly, and there will be no local overtemperature phenomenon, thereby improving the thawing quality.

[0080] The refrigerator 200 is also provided with a refrigerating chamber 203 and a freezing chamber 204 . The refrigerating chamber 203 is arranged at the upper part of the refrigerator 200 body, and the freezing chamber 204 is arranged at the lower part of the refrigerator 200 body; the thawing device 100 is arranged between the refrigerating chamber 203 and the freezing chamber 204 .

[0081] The refrigerator 200 is further provided with an upper door 201 and a lower door 202 . The upper door 201 is used to open or close the refrigerating chamber 203 and the thawing device 100 , and the lower door 202 is used to open and close the freezing chamber 204 .

[0082] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A thawing device, characterized in that: The thawing device comprises: Cavity, a thawing plate, the thawing plate being arranged at the bottom of the cavity; and an air supply assembly, the air supply assembly being arranged at the top of the cavity, Wherein, the air supply assembly is configured such that: the wind of the air supply assembly moves along the inner wall side of the cavity toward the thawing plate, and flows back to the air supply assembly from the bottom of the cavity; The air supply assembly further includes a lower plate, the lower plate is provided with an air outlet and an air inlet, the air inlet is provided in the middle of the lower plate, and the air outlets are evenly distributed along the circumference of the lower plate; Wherein, the wind of the air supply component flows into the cavity from the air outlet, and flows into the air supply component from the air inlet.

2. The thawing device according to claim 1, characterized in that: The air supply assembly further includes a heat insulating member, which is disposed on the lower plate. A mounting groove and an air duct groove are disposed in the heat insulating member. The mounting groove is connected to the air duct groove. The air outlet is arranged opposite to the air duct groove, and the installation groove is arranged opposite to the air inlet.

3. The thawing device according to claim 2, characterized in that: The air supply assembly further includes a cover plate, wherein the cover plate and the lower plate enclose a heat insulation cavity, and the heat insulation member is arranged in the heat insulation cavity; and / or, The diameter of the air outlet becomes smaller along the direction toward the cavity.

4. The thawing device according to claim 3, characterized in that: The air supply assembly also includes a fan, which is arranged in the installation groove, and the air inlet channel of the fan is arranged opposite to the air inlet.

5. The thawing device according to claim 3, characterized in that: The lower plate has a concave portion sunken toward the interior of the cavity, and the air outlet is arranged on the concave portion.

6. The thawing device according to claim 4, characterized in that: The air supply assembly further includes a buffer member, which is disposed between the fan and the lower plate; and / or, The shape of the heat insulating member corresponds to the shape of the lower plate, and the thickness of the heat insulating member at the installation groove and the air duct groove is greater than the thickness of the end portion of the heat insulating member.

7. The thawing device according to claim 1, characterized in that: The air supply component also includes at least one of a resistance wire, a PTC heating module, or an ultrasonic atomization humidification module.

8. The thawing device according to claim 1, characterized in that: The thawing device further comprises a drawer, wherein the drawer is arranged in the cavity, the thawing plate is also arranged in the drawer, and the drawer is movable relative to the cavity.

9. A refrigerator, characterized in that: The refrigerator comprises a thawing device according to any one of claims 1-8.

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