Split type ice cream maker

Abstract

The application provides a split type freezing and thawing machine, which comprises a freezing box and a thawing box, a swing mechanism and a plurality of heating mechanisms are arranged in the thawing box, and the heating mechanisms are connected with the swing mechanism; the swing mechanism comprises a driving assembly and two guide assemblies, the guide assemblies are connected with the driving assembly; and a gas distribution screen assembly is arranged in the freezing box. The split type freezing and thawing machine can be widely applied to various fields such as biology, medicine, physics, chemistry and material research.

Description

Technical Field

[0001] This invention belongs to the field of freeze-thaw, and in particular relates to a split-type freeze-thaw machine. Background Technology

[0002] Current cryo-thawing equipment for proteins in biopharmaceuticals uses a cold / hot plate system to directly freeze or thaw samples. This involves circulating a cold / hot medium through a fixed hollow plate, placing the sample on the plate, and freezing or thawing through heat exchange with the cold / hot medium. However, this structure often prevents the sample from fully contacting the refrigerant during freezing, resulting in slow freezing rates, uneven freezing, and significant low-temperature concentration. It also leads to uneven concentrations within the thawed sample, affecting the usability of the protein. Furthermore, this structure requires additional refrigeration, heating, and circulation piping systems. Summary of the Invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and propose a split-type freeze-thaw machine.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A split-type freeze-thaw machine includes a freezing chamber and a thawing chamber. The thawing chamber is equipped with a swing mechanism and several heating mechanisms, all of which are connected to the swing mechanism.

[0006] The swing mechanism includes a drive component and two guide components, both of which are connected to the drive component.

[0007] The freezer is equipped with a gas distribution panel assembly.

[0008] Furthermore, the defrosting box is provided with a fixed side plate, the fixed side plate is provided with a vertical slide rail, the guide assembly includes a vertical lifting plate, and one side of the vertical lifting plate is provided with a vertical slider that cooperates with the vertical slide rail;

[0009] The other side of the vertical lifting plate is provided with several horizontal slide rails, and the horizontal slide rails are provided with horizontal sliders that cooperate with them. The horizontal sliders are provided with swing bearing holes, and the guide assembly is connected to the heating mechanism through the swing bearing holes.

[0010] Furthermore, the drive assembly includes a supporting bearing housing, a ball screw, a nut, a fixed bearing housing, and a servo motor. One end of the ball screw is connected to the servo motor and supported by the fixed bearing housing, while the other end is connected to the supporting bearing housing. The nut is connected to the ball screw and is connected to the vertical lifting plate via a connecting plate.

[0011] Furthermore, the fixed side plate is provided with a plurality of fixed bearing holes, and the fixed side plate is connected to the heating mechanism through the fixed bearing holes.

[0012] Furthermore, the heating mechanism includes a lower heating plate and an upper heating plate, with the upper heating plate located above the lower heating plate. A heating lifting assembly and several guide columns are disposed between the lower and upper heating plates. The heating lifting assembly includes a gear, a rack, and a motor. The gear and motor are fixed to the lower heating plate, and the rack is fixed to the upper heating plate. The motor drives the gear to rotate, and the gear meshes with the rack, thereby causing the upper heating plate to rise and fall.

[0013] Furthermore, a fixed rotating shaft is provided on both sides of the lower heating plate, and the fixed rotating shaft is connected to the fixed bearing hole. A swing rotating shaft is provided on both sides of the lower heating plate, and the swing rotating shaft is connected to the swing bearing hole. The swing rotating shaft is located on one side of the fixed rotating shaft.

[0014] Furthermore, the gas distribution screen assembly includes a gas distribution base plate, which has several gas distribution zones. Each gas distribution zone includes several groups of identical gas distribution holes. Each group of gas distribution holes consists of several gas distribution holes evenly distributed around its center. A gas distribution adjustment plate is provided above each group of gas distribution holes. The structure of the gas distribution adjustment plate is the same as that of the gas distribution hole groups. The gas distribution adjustment plate and the gas distribution base plate are rotatably connected by a rotating locking shaft. The gas distribution holes have a fan-shaped structure.

[0015] Furthermore, a circulation channel is provided on the upper inner side of the freezer, and several freezing chambers are arranged below the circulation channel. A return / exhaust air chamber and a liquid nitrogen vaporization chamber are respectively arranged at both ends of the inner side of the freezer. One end of each freezing chamber is connected to the liquid nitrogen vaporization chamber, and the other end is connected to the return / exhaust air chamber. The top of the return / exhaust air chamber is connected to the circulation channel. A centrifugal impeller is installed at the top of the liquid nitrogen vaporization chamber, located on one side of the circulation channel. The gas distribution panel assembly is located between the liquid nitrogen vaporization chamber and the freezing chambers. Several one-way dampers are provided on the return / exhaust air chamber. The freezing chambers are separated by a support plate. The liquid nitrogen vaporization chamber is connected to a solenoid valve.

[0016] Furthermore, the freezer includes a main body and a freezer-sealed insulated door. An outer sealing ring is provided on the inner side of the freezer-sealed insulated door, and a freezer-sealed door frame is provided on the outer side of the main body. An inner sealing ring is provided on the freezer-sealed door frame. The freezer employs two sealing rings, and the entire main body of the freezer is wrapped with ultra-low temperature insulation cotton to reduce heat exchange with the outside environment and improve thermal efficiency.

[0017] Furthermore, the defrosting box includes a defrosting body and a defrosting sealing door. A defrosting sealing strip is provided on the inner side of the defrosting sealing door, and a defrosting sealing plate frame is provided on the outer side of the defrosting body.

[0018] Regarding freezing: The sample to be frozen is placed in a specially designed freezing chamber. Liquid nitrogen is sprayed into the chamber to cool it down. The supply of liquid nitrogen is controlled by a solenoid valve in the liquid nitrogen supply pipeline, which in turn controls the flow of liquid nitrogen and thus the temperature inside the freezing chamber. The entire cooling process is programmed, meaning that the cooling proceeds at a predetermined rate based on the sample's freezing characteristics. Once the set temperature is reached and maintained for a certain period, the sample can be removed.

[0019] Regarding thawing: Thawing employs a process using upper and lower double-layer heating plates simultaneously. This effectively shortens the thawing path, expands the heat exchange area, and improves thawing efficiency. Before thawing, the thawing chamber is preheated by heating the heating plates to the set temperature and maintaining this temperature for a certain period. Then, the thawing sample is placed on the heating plates in the thawing chamber. Simultaneously, the heating plates are maintained at the set temperature through program and temperature sensor feedback control until thawing is complete. Once the thawing sample has completely turned into a liquid, it is shaken to mix thoroughly.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] The split-type freeze-thaw machine of this invention uses liquid nitrogen as the refrigerant in the freezing section. After vaporization, liquid nitrogen makes direct contact with the sample to be frozen from all directions, allowing the sample to freeze simultaneously from all angles, thus improving freezing efficiency and uniformity. The gas distribution screen assembly ensures uniform temperature in all freezing chambers throughout the entire freezing chamber. Furthermore, a reasonable nitrogen circulation path saves on liquid nitrogen consumption. In the thawing section, the upper and lower heating plates press the thawing sample together for simultaneous heating, effectively shortening the thawing heating path and improving thawing efficiency. At the same time, the swing structure after thawing ensures uniform concentration throughout the thawing sample. Moreover, this invention eliminates the need for separate refrigeration, heating, and circulation pipeline systems, saving on equipment costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the split-type freeze-thaw machine described in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the freezer according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the freezing body according to an embodiment of the present invention;

[0025] Figure 4 This is a side view of the freezing body according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the defrosting box according to an embodiment of the present invention;

[0027] Figure 6 This is a front view of the thawing body described in an embodiment of the present invention;

[0028] Figure 7 This is a cross-sectional view of the thawing body described in an embodiment of the present invention;

[0029] Figure 8 This is a front view of the heating mechanism described in an embodiment of the present invention;

[0030] Figure 9 This is a rear view of the heating mechanism described in an embodiment of the present invention;

[0031] Figure 10 This is a front view of the swing mechanism described in an embodiment of the present invention;

[0032] Figure 11 This is a rear view of the swing mechanism described in an embodiment of the present invention;

[0033] Figure 12 This is a schematic diagram of the gas distribution screen assembly according to an embodiment of the present invention;

[0034] Figure 13 The following is a partial enlarged view of the gas distribution screen assembly described in the embodiment of the present invention: the left side shows the gas distribution adjustment plate and the gas distribution hole group intersecting, the middle shows the gas distribution adjustment plate and the gas distribution hole group not overlapping at all, and the right side shows the gas distribution adjustment plate and the gas distribution hole group completely overlapping.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Freezer; 2. Control panel; 3. Thawing chamber; 4. Freezer sealing and insulation door; 5. Outer sealing ring; 6. Freezer body; 7. Inner sealing ring; 8. Freezer sealing door frame; 9. Freezer cavity; 10. One-way damper; 11. Return / exhaust air chamber; 12. Freezer temperature sensor; 13. Circulation channel; 14. Centrifugal impeller; 15. Liquid nitrogen vaporization chamber; 16. Gas distribution panel assembly; 17. Tray; 18. Solenoid valve; 19. Thawing door frame; 20. Thawing body; 21. Thawing sealing strip; 22. Thawing sealing door; 23. Thawing sealing plate frame; 24. Swinging mechanism; 25. Heating mechanism; 26. Thawing cavity; 27. Bottom heating element. 28. Heating plate; 29. ​​Guide column; 30. Upper heating plate; 31. Fixed rotating shaft; 32. Swinging rotating shaft; 33. Heating lifting assembly; 34. Defrost temperature sensor; 35. Guide assembly; 36. Horizontal slide rail; 37. Horizontal slider; 38. Swing bearing hole; 39. Fixed bearing hole; 40. Fixed side plate; 41. Vertical lifting plate; 42. Gas distribution base plate; 43. Gas distribution adjustment plate; 44. Rotary locking shaft; 45. Drive assembly; 46. Support bearing seat; 47. Ball screw; 48. Nut; 49. Fixed bearing seat; 50. Servo motor; 51. Vertical slide rail; 52. Vertical slider; 53. Gas distribution hole assembly. Detailed Implementation

[0037] Unless otherwise defined, the technical terms used in the following embodiments have the same meanings as commonly understood by those skilled in the art. Unless otherwise specified, the experimental reagents used in the following embodiments are conventional biochemical reagents; and the experimental methods described are conventional methods.

[0038] like Figure 1-13 As shown, it includes a freezer 1 and a defrost 3. The defrost 3 is equipped with a swing mechanism 24 and four heating mechanisms 25. All the heating mechanisms 25 are connected to the swing mechanism 24.

[0039] The swing mechanism 24 includes a drive assembly 44 and two guide assemblies 34, all of which are connected to the drive assembly 44.

[0040] The freezer 1 is equipped with a gas distribution panel assembly 16.

[0041] The defrosting box 3 is provided with a fixed side plate 39, and a vertical slide rail 50 is provided on the fixed side plate 39. The guide assembly 34 includes a vertical lifting plate 40, and a vertical slider 51 that cooperates with the vertical slide rail 50 is provided on one side of the vertical lifting plate 40.

[0042] The vertical lifting plate 40 is provided with four horizontal slide rails 35 on the other side. The horizontal slide rails 35 are provided with horizontal sliders 36 that cooperate with them. The horizontal sliders 36 are provided with swing bearing holes 37. The guide assembly 34 is connected to the heating mechanism 25 through the swing bearing holes 37.

[0043] The drive assembly 44 includes a support bearing seat 45, a ball screw 46, a nut 47, a fixed bearing seat 48, and a servo motor 49. One end of the ball screw 46 is connected to the servo motor 49 and supported by the fixed bearing seat 48, while the other end is connected to the support bearing seat 45. The nut 47 is connected to the ball screw 46 and is connected to the vertical lifting plate 40 through a connecting plate.

[0044] The fixed side plate 39 is provided with four fixed bearing holes 38, and the fixed side plate 39 is connected to the heating mechanism 25 through the fixed bearing holes 38.

[0045] The heating mechanism 25 includes a lower heating plate 27 and an upper heating plate 29. The upper heating plate 29 is located above the lower heating plate 27. A heating lifting assembly 32 and four guide columns 28 are arranged between the lower heating plate 27 and the upper heating plate 29. The heating lifting assembly 32 includes a gear, a rack, and a motor. The gear and motor are fixed to the lower heating plate 27, and the rack is fixed to the upper heating plate 29. The motor drives the gear to rotate, and the gear meshes with the rack, thereby driving the upper heating plate 29 to rise and fall.

[0046] The lower heating plate 27 is provided with fixed rotating shafts 30 on both sides, and the fixed rotating shafts 30 are connected to the fixed bearing holes 38. The lower heating plate 27 is provided with swing rotating shafts 31 on both sides, and the swing rotating shafts 31 are connected to the swing bearing holes 37. The swing rotating shafts 31 are located on one side of the fixed rotating shafts 30.

[0047] The gas distribution panel assembly 16 includes a gas distribution base plate 41, which has four gas distribution zones. Each gas distribution zone includes ten identical gas distribution hole groups 52. Each gas distribution hole group 52 is composed of several gas distribution hole groups 52 evenly distributed around its center. Each gas distribution hole group 52 is provided with a gas distribution adjustment plate 42 above it. The structure of the gas distribution adjustment plate 42 is the same as that of the gas distribution hole group 52. The gas distribution adjustment plate 42 and the gas distribution base plate 41 are rotatably connected by a rotating locking shaft 43. The gas distribution holes have a fan-shaped structure.

[0048] The freezer 1 has a circulation channel 13 on its upper inner side, and four freezing chambers 9 below the circulation channel 13. A return / exhaust air chamber 11 and a liquid nitrogen vaporization chamber 15 are respectively located at both ends of the inner side of the freezer 1. One end of each freezing chamber 9 is connected to the liquid nitrogen vaporization chamber 15, and the other end is connected to the return / exhaust air chamber 11. The top of the return / exhaust air chamber 11 is connected to the circulation channel 13. A centrifugal impeller 14 is located on the top of the liquid nitrogen vaporization chamber 15, and is situated on one side of the circulation channel 13. A gas distribution panel assembly 16 is located between the liquid nitrogen vaporization chamber 15 and the freezing chambers 9. Two one-way dampers 10 are provided on the return / exhaust air chamber 11. The freezing chambers 9 are separated by a support plate 17. A solenoid valve 18 is connected to the liquid nitrogen vaporization chamber 15.

[0049] The freezer 1 includes a main body 6 and a freezer-sealed insulated door 4. An outer sealing ring 5 is provided on the inner side of the freezer-sealed insulated door 4, and a freezer-sealed door frame 8 is provided on the outer side of the main body 6. An inner sealing ring 7 is provided on the freezer-sealed door frame 8. The freezer 1 employs two sealing rings, and the entire main body of the freezer 1 is wrapped with ultra-low temperature insulation cotton to reduce heat exchange with the outside environment and improve thermal efficiency.

[0050] The defrosting box 3 includes a defrosting body 20 and a defrosting sealing door 22. A defrosting sealing strip 21 is provided on the inner side of the defrosting sealing door 22, and a defrosting sealing plate frame 23 is provided on the outer side of the defrosting body 20.

[0051] The present invention will be described in detail below with reference to the embodiments.

[0052] like Figure 1 As shown, a split-type freeze-thaw machine consists of a freezing chamber 1, an operating panel 2, and a thawing chamber 3. The operation of the freezing chamber 1 and the thawing chamber 3 can be completed using the central operating panel 2. It employs two sealing rings, inner and outer. The entire freezing chamber 1 is wrapped with ultra-low temperature insulation cotton, while the main body of the thawing chamber 3 is wrapped with ordinary insulation cotton to reduce heat exchange with the outside environment and improve thermal efficiency.

[0053] like Figures 2-4 As shown, the entire freezer 1 mainly includes a freezer body 6, a freezer sealing and heat preservation door 4, and a freezer sealing door frame 8, and adopts two sealing rings, inner and outer. The entire freezer body 6 is wrapped with ultra-low temperature insulation cotton to reduce heat exchange with the outside and improve thermal efficiency.

[0054] Liquid nitrogen is sprayed onto the high-speed rotating centrifugal impeller 14 after passing through the solenoid valve 18. The centrifugal impeller 14 disperses the liquid nitrogen into the liquid nitrogen vaporization chamber 15. The liquid nitrogen vaporizes and expands in the vaporization chamber, increasing its pressure. The vaporized liquid nitrogen is evenly distributed into the four freezing chambers 9 divided by the support plate 17 by the gas distribution screen assembly 16. At this time, the solenoid valve 18 is controlled to open and close based on the temperature fed back by the freezing temperature sensor 12 and the temperature set in the program. After passing through the freezing chamber 9, the nitrogen enters the return / exhaust air chamber 11. Part of it is discharged into the atmosphere through the one-way damper 10, and part of it is re-inhaled into the liquid nitrogen vaporization chamber 15 by the centrifugal impeller 14 through the circulation channel 13.

[0055] Figure 3 The middle arrow indicates the nitrogen circulation path. During freezing, because liquid nitrogen expands rapidly after vaporization, the pressure in the vaporization chamber, freezing chamber 9, and return / exhaust air chamber 11 also increases accordingly. Once a certain pressure is reached, it will open the one-way damper 10 to discharge nitrogen outward. The internal circulation of the refrigeration system is achieved by the axial suction and tangential exhaust characteristics of the centrifugal impeller 14, that is, air is drawn from the circulation channel 13 and discharged into the liquid nitrogen vaporization chamber 15, forming a circulation.

[0056] like Figures 12-13 As shown, when liquid nitrogen vaporizes in the vaporization chamber, the pressure at different locations within the vaporization chamber is uneven, resulting in different air intake volumes in the four regions of the freezing chamber 9. Consequently, the temperature uniformity of each region within the freezing chamber 9 is very poor. The main function of the gas distribution panel assembly 16 is to ensure a balanced temperature in each region of the freezing chamber 9. Based on the temperature feedback from the temperature sensors in each region of the freezing chamber 9, the size of the air intake holes in each region is adjusted, making the air intake holes smaller in the regions with lower temperatures and larger in the regions with higher temperatures.

[0057] The air distribution base plate 41 is divided into four areas. The air intake volume can be adjusted by adjusting the relative position of the air distribution adjustment plate 42 and the air distribution hole group 52 in each area. Six evenly distributed fan-shaped air distribution holes are cut out on the air distribution base plate 41 with a specific point as the center. These six fan-shaped air distribution hole groups 52 are air distribution hole groups 52. The air distribution adjustment plate 42, which is concentric and has the same shape as the air distribution hole group 52, is connected to the air distribution base plate 41 by rotating the locking shaft 43. The size of the air intake hole is adjusted by rotating the air distribution adjustment plate 42 around the shaft. After adjustment, the air distribution adjustment plate 42 and the air distribution base plate 41 are locked and fixed.

[0058] like Figures 5-7 As shown, the defrosting chamber 3 consists of a defrosting sealing door 22, a defrosting body 20, a swing mechanism 24, and a heating mechanism 25. The entire defrosting chamber 3 can accommodate four sets of heating mechanisms 25, assembled as follows: Figure 7 As shown.

[0059] like Figures 8-9As shown, the upper and lower heating plates 27 of the heating mechanism 25 are made of aluminum alloy, with silicone heating plates attached to their surfaces. The upper heating plate 29 is driven by a motor to move up and down through gear and rack meshing. When a sample to be thawed is placed in the heating mechanism, the upper heating plate 29 descends and presses the sample to ensure close contact between the heating plate and the sample, thereby maximizing the heat exchange efficiency.

[0060] like Figures 10-11 As shown, the fixed rotating shaft 30 of the heating mechanism 25 is installed into the fixed bearing hole 38 of the fixed side plate 39, so that the heating mechanism 25 can rotate around this shaft. The swing rotating shaft 31 of the heating mechanism 25 is installed into the swing bearing hole 37 of the horizontal slider 36. The ball screw 46 drives the vertical lifting plate 40 to move up and down under the drive of the servo motor 49. The horizontal slider 36 is installed on the vertical lifting plate 40 through the horizontal linear guide rail. At the same time, the horizontal slider 36 can slide freely in the horizontal direction. In this way, the horizontal slider 36 can realize the arc motion composed of vertical motion and horizontal motion, that is, swing around the fixed rotating shaft 30. The swing amplitude is set to -10° to +10°, and the swing amplitude can be set arbitrarily within this range.

[0061] This swing mechanism 24 is driven by a single servo motor 49, which drives multiple components to swing simultaneously, achieving consistency in swing amplitude, speed, and pace. Both the swing amplitude and speed are adjustable. This achieves the purpose of mixing the thawed sample after it has become liquid.

[0062] This swing mechanism is driven by a single servo motor, which in turn drives multiple components to swing simultaneously, achieving consistency in swing amplitude, speed, and pace. Both the swing amplitude and speed are adjustable. This achieves the purpose of mixing thawed samples after they have become liquid.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A split-type freeze-thaw machine, characterized in that: It includes a freezer and a thawing chamber. The thawing chamber is equipped with a swing mechanism and several heating mechanisms, and the heating mechanisms are all connected to the swing mechanism. The swing mechanism includes a drive assembly and two guide assemblies, both of which are connected to the drive assembly. The freezer is equipped with a gas distribution panel assembly; The defrosting chamber is equipped with a fixed side plate, and a vertical slide rail is provided on the fixed side plate. The guide assembly includes a vertical lifting plate, and a vertical slider that cooperates with the vertical slide rail is provided on one side of the vertical lifting plate. On the other side of the vertical lifting plate, there are several horizontal slide rails. A horizontal slider is provided on the horizontal slide rail and it cooperates with the horizontal slider. The horizontal slider is provided with a swing bearing hole. The guide assembly is connected to the heating mechanism through the swing bearing hole. The drive assembly includes a support bearing housing, a ball screw, a nut, a fixed bearing housing, and a servo motor. One end of the ball screw is connected to the servo motor and supported by the fixed bearing housing, while the other end is connected to the support bearing housing. The nut is connected to the ball screw and is connected to the vertical lifting plate via a connecting plate. The fixed side plate is provided with a plurality of fixed bearing holes, and the fixed side plate is connected to the heating mechanism through the fixed bearing holes; The heating mechanism includes a lower heating plate and an upper heating plate, the upper heating plate being located above the lower heating plate, and a heating lifting assembly and several guide columns being provided between the lower heating plate and the upper heating plate. The lower heating plate is provided with fixed rotating shafts on both sides, and the fixed rotating shafts are connected to the fixed bearing holes. The lower heating plate is also provided with swing rotating shafts on both sides, and the swing rotating shafts are connected to the swing bearing holes. The swing rotating shafts are located on one side of the fixed rotating shafts.

2. The split-type freeze-thaw machine according to claim 1, characterized in that: The aforementioned air distribution panel assembly includes an air distribution base plate, on which several air distribution zones are provided. Each air distribution zone includes several air distribution hole groups with identical structures. Each air distribution hole group consists of several air distribution holes evenly distributed around its center. An air distribution adjustment plate is provided above each air distribution hole group. The structure of the air distribution adjustment plate is the same as that of the air distribution hole group. The air distribution adjustment plate and the air distribution base plate are rotatably connected by a rotating locking shaft. The air distribution holes have a fan-shaped structure.

3. The split-type freeze-thaw machine according to claim 2, characterized in that: The freezer has a circulation channel on its upper inner side, and several freezing chambers below the circulation channel. A return / exhaust air chamber and a liquid nitrogen vaporization chamber are respectively located at both ends of the freezer's inner side. One end of each freezing chamber is connected to the liquid nitrogen vaporization chamber, and the other end is connected to the return / exhaust air chamber. The top of the return / exhaust air chamber is connected to the circulation channel. A centrifugal impeller is located at the top of the liquid nitrogen vaporization chamber, on one side of the circulation channel. The gas distribution panel assembly is located between the liquid nitrogen vaporization chamber and the freezing chamber. Several one-way dampers are provided on the return / exhaust air chamber.

4. The split-type freeze-thaw machine according to claim 1, characterized in that: The freezer includes a freezer body and a freezer-sealed insulated door. An outer sealing ring is provided on the inner side of the freezer-sealed insulated door, and a freezer-sealed door frame is provided on the outer side of the freezer body. An inner sealing ring is provided on the freezer-sealed door frame.

5. The split-type freeze-thaw machine according to claim 1, characterized in that: The defrosting chamber includes a defrosting body and a defrosting sealing door. A defrosting sealing strip is provided on the inner side of the defrosting sealing door, and a defrosting sealing plate frame is provided on the outer side of the defrosting body.

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