A direct cooling ultra-low temperature refrigeration equipment

Abstract

The present invention is applicable to the technical field related to ultra-low temperature refrigeration equipment, and provides a direct-cooling ultra-low temperature refrigeration equipment, including a refrigerator main body, an upper cover is arranged on the refrigerator main body, the output end of the refrigerator main body is connected to a plurality of output boxes through a connecting pipe, a plurality of output boxes are arranged on the upper ends of the output boxes, the upper and lower adjacent output boxes are connected by a snap-in unit, the lower end of the output box is connected to a supporting base through a first connecting unit, the refrigerator main body of the present invention is connected to the output box through a connecting pipe, thereby the cold air can be delivered to the required position, during production, the length of the connecting pipe can be selected and replaced according to the use requirements, and the plurality of output boxes are connected by a snap-in unit, thereby the height of the cold air output can be adjusted according to the requirements.

Description

Technical Field

[0001] The present invention belongs to the technical field related to ultra-low temperature refrigeration equipment, and in particular relates to a direct cooling ultra-low temperature refrigeration equipment. Background Art

[0002] Ultra-low temperature refrigeration equipment is usually used in cold storage. The working principle of ultra-low temperature refrigeration equipment in cold storage is to compress the refrigerant through a compressor, so that the refrigerant is in a high-pressure liquid state. After the high-pressure liquid refrigerant passes through the expansion valve and the evaporator, it evaporates and absorbs heat in the process to cool the cold storage space.

[0003] A patent with patent publication number CN108168155B discloses a condenser for refrigeration equipment, a refrigeration system and a refrigeration equipment. According to the condenser for refrigeration equipment, a condenser with a shell is provided, and a coolant is stored in the shell, so that during the heat dissipation process, the condenser body first contacts the coolant, and the heat in the condenser body is quickly transferred to the coolant, and then the heat stored in the coolant is evenly dissipated to the outside, thereby realizing rapid transfer of heat from the condenser body, and at the same time achieving balanced heat dissipation and reducing energy consumption; however, when the above device is actually used, there are some shortcomings. The heights of the objects in the cold storage are different. When the above device performs low-temperature refrigeration, the degree of refrigeration cannot be adjusted according to the placement height of the objects. Based on this, a direct cooling ultra-low temperature refrigeration device that can solve the above problems is now proposed. Summary of the invention

[0004] The present invention provides a direct cooling ultra-low temperature refrigeration device, which aims to solve the problem that the heights of articles in a cold storage are different and the existing device cannot adjust the refrigeration height according to the height when performing low-temperature refrigeration.

[0005] The present invention is implemented as follows: a direct cooling ultra-low temperature refrigeration device includes a refrigerator body, an upper cover is arranged on the refrigerator body, the output end of the refrigerator body is connected to a plurality of output boxes through a connecting pipe, a plurality of output boxes are arranged at the upper ends of the plurality of output boxes, the upper and lower adjacent output boxes are connected by a snap-on unit, and the lower end of the output box is connected to a support base through a first connecting unit.

[0006] Preferably, each of the plurality of output boxes is provided with a first through groove.

[0007] Preferably, the snap-in unit includes a first connecting plate symmetrically arranged and fixedly connected to the upper end of the output box body, a first snap-in plate is fixedly connected to the side of the first connecting plate, a first connecting frame is fixedly connected to the lower end of the output box body, first snap-in grooves cooperating with the first snap-in plate are provided on both sides of the first connecting frame body, a first blocking unit is provided on the output box body, and a limiting unit is provided between two adjacent output boxes above and below.

[0008] Preferably, the ends of the two first connecting plates are fixedly connected with first blocking plates.

[0009] Preferably, the first blocking unit includes two second connecting plates fixedly connected to the inner side of the output box body, the sides of the two second connecting plates are fixedly connected to guide rods, the inner side of the output box body is fixedly connected to the third connecting plate, the ends of the two guide rods are fixedly connected to the third connecting plate, the outer sides of the two guide rods are sleeved with a movable plate, the movable plate is connected to the second connecting plate through a first spring, the first spring is sleeved on the outer sides of the guide rods, the upper end of the movable plate is fixedly connected to a fourth connecting plate, the side of the fourth connecting plate contacting the first through-groove is fixedly connected with two symmetrically arranged clamping protrusions, the side wall of the first through-groove is provided with a second clamping groove matching the clamping protrusion, the fourth connecting plate is fixedly connected to the side wall of the first through-groove with an elastic sealing layer, the first handle is fixedly connected to the fourth connecting plate, the output box body is provided with a groove, and the lower end of the first connecting frame body is fixedly connected to the first pushing plate.

[0010] Preferably, the limit unit includes a third clamping groove opened at the lower end of the output box body, a limit rod is slidably connected in the third clamping groove, the lower end of the limit rod is fixedly connected to a second push plate, two symmetrically arranged fifth connecting plates are fixedly connected on both sides of the limit rod, the two fifth connecting plates are connected to the first connecting frame body through a second spring, the lower end of the output box body is connected to two symmetrically arranged sixth connecting plates through a symmetrically arranged third spring, a limit block is fixedly connected between the two sixth connecting plates, the lower end of the limit block is provided with an arc surface, the upper end of the limit block is provided with a first inclined surface, and the output box body is provided with a sixth clamping groove matching the limit block.

[0011] Preferably, a second inclined surface is provided at the front end of the limiting rod.

[0012] Preferably, the first connecting unit includes a second connecting frame fixedly connected to the supporting base, a second connecting frame inner side is fixedly connected with a symmetrically arranged second clamping plate cooperating with the first clamping groove, a second through-groove is provided on the second connecting frame, a connecting block is inserted in the second through-groove, a clamping strip is fixedly connected to the upper end of the connecting block, a fourth clamping strip cooperating with the clamping strip is provided on the side wall of the second through-groove, a fifth clamping strip cooperating with the clamping strip is provided at the lower end of the first connecting frame, a connecting rod is fixedly connected to the connecting block, and a plug-in button is fixedly connected to the end of the connecting rod.

[0013] Preferably, a plurality of groups of air holes distributed in a circumferential array are provided on the side of the output box body, and a second blocking unit is provided on the side of the output box body.

[0014] Preferably, the second blocking unit includes a magnetic ring fixedly connected to the side of the output box body, the magnetic ring is provided with a plurality of third through grooves distributed in a circumferential array, a second blocking plate is inserted into the third through grooves, the upper and lower ends of the second blocking plate are fixedly connected with magnetic plates, the magnetic plates are magnetically connected to the magnetic ring, and a second handle is fixedly connected to the side of the second blocking plate.

[0015] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0016] By setting the limiting unit, when adjacent output boxes are connected, under the action of the second spring, the end of the limiting rod contacts the side of the first connection frame, at this time the second spring is stretched, and the limiting block is inserted into the sixth clamping groove provided on the output box at the lower end, thereby ensuring the stability of the connection between the upper and lower output boxes. When the output box needs to be removed, the second push plate is pulled outward, at this time the limiting rod is away from the first connection frame, and under the action of the third spring, the limiting block is disengaged from the sixth clamping groove, thereby enabling the output box at the upper end to be removed;

[0017] Through the setting of the second barrier unit, if a group of air vents needs to output cold air, the second barrier plate will be moved downward in the third through groove, so that the magnetic plate arranged at the upper end of the second barrier plate is magnetically connected to the magnetic ring, ensuring that the air vents are in a through state; otherwise, the second barrier plate will be moved upward in the third through groove, so that the magnetic plate arranged at the lower end of the second barrier plate is magnetically connected to the magnetic ring. At this time, the second barrier plate seals the air vents to ensure that the air vents are in a non-through state, and the degree of refrigeration can be adjusted according to the placement height of the objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the actual use structure of a direct cooling ultra-low temperature refrigeration device provided by the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of an output box in a direct cooling ultra-low temperature refrigeration device provided by the present invention. Figure 1 ;

[0020] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 4 It is a structural schematic diagram of a support base in a direct cooling ultra-low temperature refrigeration device provided by the present invention;

[0022] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0023] Figure 6 This is a schematic diagram of the structure of an output box in a direct cooling ultra-low temperature refrigeration device provided by the present invention. Figure 2 ;

[0024] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure at C in the middle;

[0025] Figure 8 This is a schematic diagram of the structure of an output box in a direct cooling ultra-low temperature refrigeration device provided by the present invention. Figure 3 ;

[0026] Fig. 9 yes Figure 8 Schematic diagram of the enlarged structure at D in the middle;

[0027] Fig.10 This is a schematic diagram of the structure of the first barrier unit in a direct cooling ultra-low temperature refrigeration device provided by the present invention. Figure 1 ;

[0028] Fig.11 yes Fig.10 Schematic diagram of the enlarged structure at E in the middle;

[0029] Fig.12 This is a schematic diagram of the structure of the first barrier unit in a direct cooling ultra-low temperature refrigeration device provided by the present invention. Figure 2 .

[0030] Notes on reference numerals: 1. refrigerator body; 2. upper cover; 3. connecting pipe; 4. output box; 5. supporting base; 6. first through groove; 7. first connecting plate; 8. first clamping plate; 9. first connecting frame; 10. first clamping groove; 11. first blocking plate; 12. second connecting plate; 13. guide rod; 14. third connecting plate; 15. moving plate; 16. first spring; 17. fourth connecting plate; 18. clamping protrusion; 19. second clamping groove; 20. elastic sealing layer; 21. first handle; 22. groove; 23. first push plate; 24. third clamping groove; 25. limit rod; 26. Second push plate; 27. Fifth connecting plate; 28. Second spring; 29. ​​Third spring; 30. Sixth connecting plate; 31. Limit block; 32. Arc surface; 33. First inclined surface; 34. Second inclined surface; 35. Second connecting frame; 36. Second clamping plate; 37. Second through-groove; 38. Connecting block; 39. Clamping strip; 40. Fourth clamping groove; 41. Fifth clamping groove; 42. Connecting rod; 43. Pull-out button; 44. Air vent; 45. Magnetic ring; 46. Third through-groove; 47. Second blocking plate; 48. Magnetic plate; 49. Sixth clamping groove; 50. Second handle. DETAILED DESCRIPTION

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments. Example 1

[0033] The embodiment of the present invention provides a direct cooling ultra-low temperature refrigeration device, such as Figure 1-Figure 12As shown, it includes a refrigerator body 1, and an upper cover 2 is arranged on the refrigerator body 1. The output end of the refrigerator body 1 is connected to multiple output boxes 4 through a connecting pipe 3, and multiple output boxes 4 are arranged on the upper ends of the multiple output boxes 4. The upper and lower adjacent output boxes 4 are connected by a snap-on unit, and the lower end of the output box 4 is connected to a support base 5 through a first connecting unit.

[0034] A first through slot 6 is disposed in each of the plurality of output boxes 4 .

[0035] When the above device is actually used, the refrigerator body 1 is connected to the output box 4 through the connecting pipe 3, so that the cold air can be delivered to the required position. During production, the length of the connecting pipe 3 can be selected and replaced according to the use requirements. Multiple output boxes 4 are connected by a snap-on unit, so that the height of the cold air output can be adjusted according to the requirements.

[0036] The first connecting unit includes a second connecting frame 35 fixedly connected to the supporting base 5, a second connecting frame 35 is fixedly connected to the inner side with a symmetrically arranged second clamping plate 36 cooperating with the first clamping groove 10, a second through-groove 37 is provided on the second connecting frame 35, a connecting block 38 is inserted in the second through-groove 37, a clamping strip 39 is fixedly connected to the upper end of the connecting block 38, a fourth clamping groove 40 cooperating with the clamping strip 39 is provided on the side wall of the second through-groove 37, a fifth clamping groove 41 cooperating with the clamping strip 39 is provided at the lower end of the first connecting frame 9, a connecting rod 42 is fixedly connected to the connecting block 38, and a plug-in button 43 is fixedly connected to the end of the connecting rod 42.

[0037] When the above-mentioned first connecting unit is actually used, after the output box body 4 is clamped through the first clamping groove 10 and the second clamping plate 36, the plug-in button 43 is held and inserted into the second through groove 37, and the clamping strip 39 is inserted into the fourth clamping groove 40, thereby ensuring that the output box body 4 and the support base 5 are stably connected. Example 2

[0038] Combination Fig.12 In this embodiment, based on the embodiment 1, the snap-in unit comprises a first connecting plate 7 symmetrically arranged and fixedly connected to the upper end of the output box body 4, a first snap-in plate 8 is fixedly connected to the side of the first connecting plate 7, a first connecting frame body 9 is fixedly connected to the lower end of the output box body 4, first snap-in grooves 10 cooperating with the first snap-in plate 8 are provided on both sides of the first connecting frame body 9, a first blocking unit is arranged on the output box body 4, and a limiting unit is arranged between two upper and lower adjacent output boxes 4.

[0039] The ends of the two first connecting plates 7 are fixedly connected with first blocking plates 11 .

[0040] When the above-mentioned snap-in unit is actually used, the first connecting frame 9 can connect two adjacent output boxes 4 through the cooperation of the first snap-in plate 8 and the first snap-in groove 10, the first blocking unit can ensure that the uppermost output box 4 will not leak cold air, and the limiting unit can ensure the stability of the connection between the two adjacent output boxes 4. Example 3

[0041] Combination Figure 3 , Figure 7 , Fig. 9 , Fig.10 and Fig.11 In this embodiment, on the basis of the second embodiment, the first blocking unit includes two second connecting plates 12 fixedly connected to the inner side of the output box body 4 and symmetrically arranged, the sides of the two second connecting plates 12 are fixedly connected to the guide rods 13, the inner side of the output box body 4 is fixedly connected to the third connecting plate 14, the ends of the two guide rods 13 are fixedly connected to the third connecting plate 14, the outer sides of the two guide rods 13 are sleeved with a movable plate 15, the movable plate 15 is connected to the second connecting plate 12 through a first spring 16, and the first spring 16 is sleeved on the outer side of the guide rod 13. On the side, the upper end of the movable plate 15 is fixedly connected with a fourth connecting plate 17, and the side of the fourth connecting plate 17 in contact with the first through-groove 6 is fixedly connected with two symmetrically arranged snap-in protrusions 18, and the side wall of the first through-groove 6 is provided with a second snap-in groove 19 that cooperates with the snap-in protrusion 18, and the fourth connecting plate 17 and the side wall of the first through-groove 6 are fixedly connected with an elastic sealing layer 20, and the fourth connecting plate 17 is fixedly connected with a first handle 21, and a groove 22 is provided on the output box body 4, and the lower end of the first connecting frame body 9 is fixedly connected with a first push plate 23.

[0042] When the above-mentioned first barrier unit is actually used, the movable plate 15 contacts the side wall of the first through groove 6 under the elastic force of the first spring 16. At this time, the elastic sealing layer 20 seals the upper end of the first through groove 6. When the two adjacent output boxes 4 are connected, the first push plate 23 pushes the first handle 21 on the movable plate 15 to move, driving the elastic sealing layer 20 to contract and compress the first spring 16, so that the first through groove 6 opens. At this time, the cold air below can be output to the top through the first through groove 6, so as to output the cold air to different heights.

[0043] The limiting unit includes a third clamping groove 24 opened at the lower end of the output box body 4, a limiting rod 25 is slidably connected in the third clamping groove 24, a second push plate 26 is fixedly connected to the lower end of the limiting rod 25, two symmetrically arranged fifth connecting plates 27 are fixedly connected on both sides of the limiting rod 25, the two fifth connecting plates 27 are connected to the first connecting frame body 9 through a second spring 28, the lower end of the output box body 4 is connected to two symmetrically arranged sixth connecting plates 30 through a symmetrically arranged third spring 29, a limiting block 31 is fixedly connected between the two sixth connecting plates 30, the lower end of the limiting block 31 is provided with an arc surface 32, the upper end of the limiting block 31 is provided with a first inclined surface 33, and a sixth clamping groove 49 matched with the limiting block 31 is opened on the output box body 4.

[0044] A second inclined surface 34 is disposed at the front end of the limiting rod 25 .

[0045] When the above-mentioned limit unit is actually used, when adjacent output box bodies 4 are connected, under the action of the second spring 28, the end of the limit rod 25 contacts the side of the first connecting frame body 9. At this time, the second spring 28 is stretched, and the limit block 31 is inserted into the sixth clamping groove 49 provided on the lower output box body 4, thereby ensuring the stability of the connection between the upper and lower output box bodies 4. When the output box body 4 needs to be removed, the second push plate 26 is pulled outward. At this time, the limit rod 25 is away from the first connecting frame body 9. Under the action of the third spring 29, the limit block 31 is disengaged from the sixth clamping groove 49, thereby the upper output box body 4 can be removed. Example 4

[0046] Combination Figure 6 and Figure 8 In order to realize the output of cold air in different directions at different heights, in this embodiment, based on embodiment 3, a plurality of groups of air holes 44 distributed in a circular array are opened on the side of the output box body 4, and a second blocking unit is provided on the side of the output box body 4.

[0047] The second blocking unit includes a magnetic ring 45 fixedly connected to the side of the output box body 4, and a plurality of third through grooves 46 distributed in a circumferential array are opened on the magnetic ring 45. A second blocking plate 47 is inserted in the third through groove 46, and the upper and lower ends of the second blocking plate 47 are fixedly connected to magnetic plates 48, and the magnetic plate 48 is magnetically connected to the magnetic ring 45. A second handle 50 is fixedly connected to the side of the second blocking plate 47.

[0048] When the above-mentioned second barrier unit is actually used, if a group of air vents 44 needs to output cold air, the second barrier plate 47 is moved downward in the third through groove 46, so that the magnetic plate 48 arranged at the upper end of the second barrier plate 47 is magnetically connected to the magnetic ring 45, ensuring that the air vents 44 are in a through state; otherwise, the second barrier plate 47 is moved upward in the third through groove 46, so that the magnetic plate 48 arranged at the lower end of the second barrier plate 47 is magnetically connected to the magnetic ring 45. At this time, the second barrier plate 47 seals the air vents 44, ensuring that the air vents 44 are in a non-through state.

[0049] In summary, the working principle of the present invention is as follows: the refrigerator body 1 is connected to the output box body 4 through the connecting pipe 3, thereby the cold air can be delivered to the required position. During production, the length of the connecting pipe 3 can be selected and replaced according to the use requirements, and the multiple output boxes 4 are connected by the clamping unit, thereby the height of the cold air output can be adjusted according to the required output; after the output box body 4 is clamped by the first clamping groove 10 and the second clamping plate 36, the plug-in button 43 is held and inserted into the second through groove 37, and the clamping strip 39 is inserted into the fourth clamping groove 40, thereby ensuring that the output box body 4 is stably connected to the support base 5; the first connecting frame The body 9 can connect two adjacent output boxes 4 through the cooperation of the first clamping plate 8 and the first clamping groove 10. The first blocking unit can ensure that the output box 4 at the uppermost end will not leak cold air. The limiting unit can ensure the stability of the connection between the two adjacent output boxes 4. The movable plate 15 contacts the side wall of the first through groove 6 under the elastic force of the first spring 16. At this time, the elastic sealing layer 20 seals the upper end of the first through groove 6. When the two adjacent output boxes 4 are connected, the first pushing plate 23 pushes the first handle 21 on the movable plate 15 to move, driving the elastic sealing layer 20 to contract and compress the first spring 16, so that the first through slot 6 is opened, at this time, the cold air below can be output to the top through the first through slot 6, so as to output the cold air toward different heights; when the adjacent output boxes 4 are connected, under the action of the second spring 28, the end of the limit rod 25 contacts the side of the first connecting frame 9, at this time the second spring 28 is stretched, and the limit block 31 is inserted into the sixth clamping groove 49 provided on the output box 4 at the lower end, thereby ensuring the stability of the connection between the upper and lower output boxes 4, when it is necessary to remove the output box 4, the second push plate 26 is pulled outward, at this time the limit rod 25 is away from the first connecting frame 9, and the third spring 29 Under the action of , the limit block 31 disengages from the sixth clamping groove 49, thereby being able to remove the output box 4 at the upper end; if a group of air vents 44 needs to output cold air, the second baffle plate 47 is moved downward in the third through groove 46, so that the magnetic plate 48 arranged at the upper end of the second baffle plate 47 is magnetically connected to the magnetic ring 45, ensuring that the air vents 44 are in a through state; conversely, the second baffle plate 47 is moved upward in the third through groove 46, so that the magnetic plate 48 arranged at the lower end of the second baffle plate 47 is magnetically connected to the magnetic ring 45. At this time, the second baffle plate 47 seals the air vents 44, ensuring that the air vents 44 are in a non-through state.

[0050] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A direct cooling ultra-low temperature refrigeration device, comprising a refrigerator body (1), characterized in that: The refrigerator body (1) is provided with an upper cover (2); the output end of the refrigerator body (1) is connected to a plurality of output boxes (4) via a connecting pipe (3); a plurality of output boxes (4) are provided at the upper ends of the plurality of output boxes (4); the upper and lower adjacent output boxes (4) are connected via a snap-fit ​​unit; the lower end of the output box (4) is connected to a support base (5) via a first connecting unit; the snap-fit ​​unit comprises a symmetrically arranged first connecting plate (7) fixedly connected to the upper end of the output box (4); a first snap-fit ​​plate (8) is fixedly connected to the side of the first connecting plate (7); The lower end of the output box (4) is fixedly connected to a first connecting frame (9), and first clamping grooves (10) cooperating with the first clamping plate (8) are provided on both sides of the first connecting frame (9). A first blocking unit is provided on the output box (4), and a limiting unit is provided between two upper and lower adjacent output boxes (4); a first through groove (6) is provided in each of the plurality of output boxes (4); the ends of the two first connecting plates (7) are fixedly connected to first blocking plates (11); the first blocking unit comprises two symmetrically arranged first blocking units fixedly connected to the inner side of the output box (4); The output box (4) comprises a second connecting plate (12), the side surfaces of the two second connecting plates (12) are fixedly connected to guide rods (13), the inner side of the output box (4) is fixedly connected to a third connecting plate (14), the ends of the two guide rods (13) are fixedly connected to the third connecting plate (14), the outer sides of the two guide rods (13) are sleeved with a movable plate (15), the movable plate (15) is connected to the second connecting plate (12) via a first spring (16), the first spring (16) is sleeved on the outer sides of the guide rods (13), and the upper end of the movable plate (15) is fixedly connected to a fourth connecting plate (17). ), the side surface of the fourth connecting plate (17) in contact with the first through-groove (6) is fixedly connected with two symmetrically arranged clamping protrusions (18), the side wall of the first through-groove (6) is provided with a second clamping groove (19) cooperating with the clamping protrusion (18), the fourth connecting plate (17) and the side wall of the first through-groove (6) are fixedly connected with an elastic sealing layer (20), the fourth connecting plate (17) is fixedly connected with a first handle (21), the output box body (4) is provided with a groove (22), and the lower end of the first connecting frame body (9) is fixedly connected with a first pushing plate (23).

2. A direct cooling ultra-low temperature refrigeration device according to claim 1, characterized in that: The limiting unit comprises a third clamping groove (24) provided at the lower end of the output box body (4), a limiting rod (25) being slidably connected in the third clamping groove (24), a second pushing plate (26) being fixedly connected to the lower end of the limiting rod (25), two symmetrically arranged fifth connecting plates (27) being fixedly connected to both sides of the limiting rod (25), the two fifth connecting plates (27) being connected to the first connecting frame body (9) via a second spring (28), the lower end of the output box body (4) being connected to two symmetrically arranged sixth connecting plates (30) via a symmetrically arranged third spring (29), a limiting block (31) being fixedly connected between the two sixth connecting plates (30), the lower end of the limiting block (31) being provided with an arc surface (32), the upper end of the limiting block (31) being provided with a first inclined surface (33), and a sixth clamping groove (49) cooperating with the limiting block (31) being provided on the output box body (4).

3. A direct cooling ultra-low temperature refrigeration device as claimed in claim 2, characterized in that: A second inclined surface (34) is provided at the front end of the limiting rod (25).

4. A direct cooling ultra-low temperature refrigeration device according to claim 1, characterized in that: The first connection unit comprises a second connection frame (35) fixedly connected to the support base (5); a second clamping plate (36) symmetrically arranged and cooperating with the first clamping groove (10) is fixedly connected to the inner side of the second connection frame (35); a second through-groove (37) is provided on the second connection frame (35); a connection block (38) is inserted into the second through-groove (37); a clamping strip (39) is fixedly connected to the upper end of the connection block (38); a fourth clamping groove (40) cooperating with the clamping strip (39) is provided on the side wall of the second through-groove (37); a fifth clamping groove (41) cooperating with the clamping strip (39) is provided at the lower end of the first connection frame (9); a connection rod (42) is fixedly connected to the connection block (38); and a plug-in / plug-out button (43) is fixedly connected to the end of the connection rod (42).

5. A direct cooling ultra-low temperature refrigeration device according to claim 1, characterized in that: A plurality of groups of air holes (44) distributed in a circumferential array are provided on the side of the output box (4), and a second barrier unit is provided on the side of the output box (4).

6. A direct cooling ultra-low temperature refrigeration device as claimed in claim 5, characterized in that: The second blocking unit comprises a magnetic ring (45) fixedly connected to the side of the output box body (4); the magnetic ring (45) is provided with a plurality of third through slots (46) distributed in a circumferential array; a second blocking plate (47) is inserted into the third through slots (46); upper and lower ends of the second blocking plate (47) are fixedly connected to magnetic plates (48); the magnetic plates (48) are magnetically connected to the magnetic ring (45); and a second handle (50) is fixedly connected to the side of the second blocking plate (47).

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