Fresh-keeping machine

Abstract

The utility model provides a fresh-keeping machine, and belongs to the technical field of fresh-keeping machines. The fresh-keeping machine comprises a first clamping arm and a second clamping arm which are rotationally connected, a first annular sealing ring is arranged on a first clamping part of the first clamping arm, a second annular sealing ring opposite to the first annular sealing ring is arranged on a second clamping part of the second clamping arm, the fresh-keeping machine further comprises a rotating frame, and the rotating frame is rotationally arranged on the second clamping part. The second annular sealing ring is fixedly arranged on the rotating frame, and when the second clamping arm rotates relative to the first clamping arm, the rotating frame can rotate relative to the second clamping part to automatically adjust stress balance, so that the two annular sealing rings are in sealed butt joint. The fresh-keeping machine can improve the sealing effect when the fresh-keeping bag is vacuumized.

Description

Technical Field

[0001] The utility model belongs to the technical field of fresh-keeping machines, in particular to a fresh-keeping machine. Background Art

[0002] At present, small fresh-keeping machines on the market are low-cost and easy to carry. For example, the Chinese patent with the authorization announcement number CN220281903U discloses a handheld food fresh-keeping machine, which includes a rotatably connected upper cover and a main body, a first sealing ring is provided on the matching surface of the main body, and a second sealing ring is provided on the matching surface of the upper cover. The first sealing ring and the second sealing ring are used to match to form a vacuum zone between the upper cover and the main body. However, the two sealing rings of this handheld food fresh-keeping machine cannot automatically adjust the balance, and the first contact end may be squeezed too hard, and the other end may be squeezed loosely. After a period of use, the sealing strip is squeezed and deformed, and the sealing effect is poor. Utility Model Content

[0003] In view of the above problems existing in the prior art, an object of the embodiment of the utility model is to provide a fresh-keeping machine, which can improve the sealing effect when vacuuming a fresh-keeping bag.

[0004] The technical solution adopted in the embodiment of the utility model is:

[0005] A fresh-keeping machine comprises a first clamping arm and a second clamping arm which are rotatably connected, wherein the first clamping portion of the first clamping arm is provided with a first annular sealing ring, and the second clamping portion of the second clamping arm is provided with a second annular sealing ring which is opposite to the first annular sealing ring. The fresh-keeping machine also comprises a rotating frame which is rotatably arranged on the second clamping portion, and the second annular sealing ring is fixedly arranged on the rotating frame. When the second clamping arm rotates relative to the first clamping arm, the rotating frame can rotate relative to the second clamping portion so that the two annular sealing rings can be sealed and docked.

[0006] Furthermore, the fresh-keeping machine also includes a knife assembly, which includes a knife seat, a knife holder movably connected to the knife seat, and a cutting knife arranged on the knife holder, the knife seat is arranged on the first gripping part of the first clamping arm, and when the second gripping part of the second clamping arm is close to the first gripping part of the first clamping arm, the second gripping part can push the knife holder to move relative to the knife seat, so as to cut the fresh-keeping bag by the cutting knife. By providing the knife assembly, the fresh-keeping machine can have the function of cutting or opening the bag.

[0007] Furthermore, the knife holder is provided with a cutting groove, the cutting knife extends into the interior of the cutting groove from a first groove wall, a cutting edge is provided on a second groove wall of the cutting groove opposite to the first groove wall, and the knife holder can drive the cutting knife to be inserted into the cutting edge to cut the fresh-keeping bag. The provision of the cutting groove not only improves the cutting effect, but also prevents the cutting knife from accidentally injuring the user.

[0008] Furthermore, the fresh-keeping machine further comprises an air pump and an air extraction hole, wherein the air pump and the air extraction hole are arranged on the first clamping part, the air extraction hole is arranged in the area surrounded by the first annular sealing ring, and the air pump is connected to the air extraction hole. The fresh-keeping bag can be vacuumed by the air pump and the air extraction hole, thereby improving the fresh-keeping effect.

[0009] Furthermore, the fresh-keeping machine further comprises a heating element and a pressure strip, wherein the heating element is arranged on the first clamping part, and the pressure strip is arranged on the second clamping part, and the pressure strip can be pressed against the heating element to clamp the fresh-keeping bag, and the heating element can perform hot-melt sealing on the fresh-keeping bag after heating. The cooperation of the heating element and the pressure strip can make the fresh-keeping machine have a sealing function.

[0010] Furthermore, the first gripping part includes a gripping bottom shell and a gripping upper cover, the gripping upper cover is buckled on the gripping bottom shell and forms a gripping cavity with the gripping bottom shell, and a battery assembly for supplying power to the air pump and the heating element is arranged in the gripping cavity. This structure improves the utilization rate of the internal space of the fresh-keeping machine.

[0011] Furthermore, the second gripping part comprises a gripping lower cover, the gripping lower cover defines a bottom shell cavity, and when the gripping parts of the two clamping arms are close to each other, the first gripping part can extend into the bottom shell cavity. This structure ensures the compactness of the fresh-keeping machine.

[0012] Furthermore, the first clamping part includes a clamping bottom shell and a clamping middle cover, the clamping middle cover is buckled on the clamping bottom shell and defines a second cavity with the clamping bottom shell, and the air pump is arranged in the second cavity.

[0013] Furthermore, the second clamping portion includes a clamping upper cover and a fixing frame extending into the clamping upper cover, the rotating frame is rotatably connected to the fixing frame, the first annular sealing ring is fixed on the clamping middle cover, and the second annular sealing ring is fixed on the fixing frame.

[0014] Furthermore, the heating element is arranged on the clamping middle cover, and the pressure strip is arranged on the fixing frame.

[0015] Compared with the prior art, the beneficial effects of the embodiments of the present invention are:

[0016] The fresh-keeping machine of the utility model is provided with a rotatable rotating frame on the clamping part of the second clamping arm, and the second sealing ring is fixedly arranged on the rotating frame. When the clamping parts of the two clamping arms clamp the fresh-keeping bag, after the edge of the second sealing ring contacts the edge of the first sealing ring, the rotating frame can be driven to rotate, so that the two sealing rings are balanced and squeezed in a coaxial posture, thereby achieving an ideal sealing effect when the fresh-keeping bag is vacuumed.

[0017] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to restrict the present invention.

[0018] The overview of various implementations or examples of the technology described in this utility model is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the embodiments of the utility model. When appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present device or method.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the fresh-keeping machine according to an embodiment of the utility model;

[0021] Figure 2 This is an exploded view of the fresh-keeping machine according to an embodiment of the utility model;

[0022] Figure 3 This is a main cross-sectional view of the fresh-keeping machine according to an embodiment of the utility model;

[0023] Figure 4 This is a front view of the fresh-keeping machine according to an embodiment of the utility model;

[0024] Figure 5 It is a cross-sectional view of the clamping process of two clamping arms of the fresh-keeping machine according to the embodiment of the utility model;

[0025] Figure 6 for Figure 5 An enlarged view of part I in FIG.

[0026] Figure 7 This is a cross-sectional view of the fresh-keeping machine of the utility model after being clamped by two clamping arms;

[0027] Figure 8 for Figure 7An enlarged view of part II in FIG.

[0028] In the figure: 1. first clamping arm; 10. first clamping part; 100. clamping middle cover; 101. clamping bottom shell; 11. first holding part; 110. holding upper cover; 111. holding bottom shell; 12. linkage rod assembly; 13. battery assembly; 14. circuit board; 15. first annular sealing ring; 16. exhaust hole; 17. exhaust nozzle; 2. second clamping arm; 20. second clamping part; 21. second holding part; 22. rotating shaft; 23. second annular sealing ring; 24. bottom shell cavity; 3. pin; 4. air pump; 5. pressure strip; 6. heating element; 7. rotating frame; 8. fixed frame; 9. knife assembly; 91. knife frame; 92. cutting knife; 93. knife seat; 94. spring; 95. cutting groove. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0031] The utility model embodiment provides a fresh-keeping machine, such as Figures 1 to 3 As shown, the fresh-keeping machine includes a first clamping arm 1 and a second clamping arm 2 that are rotatably connected. The first clamping arm 1 includes a first clamping portion 10 and a first gripping portion 11, and the second clamping arm 2 includes a second clamping portion 20 and a second gripping portion 21. The clamping portions of the two clamping arms are used to clamp the bag opening of the fresh-keeping bag, and the gripping portions of the two clamping arms are used for users to hold the fresh-keeping machine. The gripping portions of the two clamping arms are connected by a pin 3, so that the two clamping arms can rotate relative to each other to clamp the fresh-keeping bag or release the fresh-keeping bag.

[0032] In this embodiment, a first annular sealing ring 15 is disposed on the first clamping portion 10 of the first clamping arm 1, and a second annular sealing ring 23 opposite to the first annular sealing ring 15 is disposed on the second clamping portion 20 of the second clamping arm 2. The two annular sealing rings are of the same size.

[0033] When the two clamping arms clamp the fresh-keeping bag, the first annular sealing ring 15 and the second annular sealing ring 23 can be tightly connected to form a vacuum zone in the area surrounded by the two annular sealing rings. The bag opening of the fresh-keeping bag can be clamped in the vacuum zone, and then the fresh-keeping belt can be vacuumed.

[0034] like Figure 2 and Figure 3 As shown, the fresh-keeping machine of this embodiment further includes a rotating frame 7, which is rotatably arranged on the second clamping part 20. The rotating frame 7 can rotate relative to the second clamping part 20, and the rotating direction of the rotating frame 7 is consistent with the rotating direction of the two clamping arms.

[0035] The second annular sealing ring 23 is fixed on the rotating frame 7. When the second clamping arm 2 rotates relative to the first clamping arm 1, the rotating frame 7 can rotate relative to the second clamping portion 20 to automatically adjust the force balance so that the two annular sealing rings are tightly sealed and docked.

[0036] Specifically, Figure 5 and Figure 6 As shown, when the second clamping arm 2 rotates relative to the first clamping arm 1, the end A2 of the second annular seal ring 23 near the pin 3 will first squeeze and contact with the end A1 of the first annular seal ring 15 near the pin 3. At this time, since the rotating frame 7 will rotate relative to the second clamping part 20 under the condition of single-sided force, A2 will rise under the action of the force, driving the rotating frame 7 to rotate counterclockwise, so that the end B2 of the second annular seal ring 23 contacts the end B1 of the first seal ring 15. Finally, the second annular seal ring 23 and the first annular seal ring 15 are coaxial and then tightly connected. Figure 7 and Figure 8 Therefore, during the rotation of the two clamping arms, the rotating frame 7 rotates synchronously, so that the two annular sealing rings are squeezed in a balanced manner.

[0037] The fresh-keeping machine of this embodiment is provided with a rotatable rotating frame 7 on the clamping part of the second clamping arm 2, and the second annular sealing ring 23 is fixedly arranged on the rotating frame 7. When the clamping parts of the two clamping arms clamp the fresh-keeping bag, after the edge of the annular sealing ring 23 contacts the edge of the first annular sealing ring 15, it can drive the rotating frame 7 to rotate, so that the two annular sealing rings are squeezed in a coaxial posture in a balanced manner, thereby achieving an ideal sealing effect when the fresh-keeping bag is vacuumed.

[0038] In some embodiments, the fresh-keeping machine further includes a knife assembly 9. The knife assembly 9 includes a knife seat 93, a knife holder 91 movably connected to the knife seat 93, and a cutting knife 92 disposed on the knife holder 91. The knife seat 93 is disposed on the gripping portion of one of the clamping arms. When the two clamping arms rotate relative to each other so that the gripping portion of the other clamping arm approaches the clamping portion, the knife holder 91 can be pushed to move relative to the knife seat 93, thereby driving the cutting knife 92 to move so as to cut the fresh-keeping tape through the cutting knife 92, so that the fresh-keeping machine can have the function of cutting or opening the bag.

[0039] Preferably, in some embodiments, the knife seat 93 is arranged on the first holding portion 11 of the first clamping arm 1. When the two clamping arms clamp the fresh-keeping bag, the clamping portions of the two clamping arms will be closed or fitted together, so that the knife holder 91 can be pushed to move relative to the knife seat 93 through the second clamping portion 20 to cut the fresh-keeping bag through the cutting knife 92.

[0040] In some embodiments, Figure 2 and Figure 3 As shown, the knife seat 93 is fixed to the outside of the first gripping portion 11, and a cutting groove 95 is provided on the knife seat 93. The knife holder 91 and the spring 94 are respectively provided inside the first gripping portion 11. The cutting knife 92 extends into the inside of the cutting groove 95 from the first groove wall thereof, and the first end of the spring 94 abuts against the knife seat 93, and the other end abuts against the knife holder 91, so that the knife holder 91 abuts against the inner wall of the first gripping portion 11. The expansion and contraction direction of the spring 94 is consistent with the movement direction of the knife holder 91.

[0041] Furthermore, a through hole is provided on one side of the first gripping portion 11 facing the second gripping portion 21, and the tool holder 91 has a protrusion (not shown in the figure) extending through the through hole to the outside, so that when the user holds the gripping portions of the two clamping arms to make them fit together, the protrusion can be pushed to drive the tool holder 91 to move and squeeze the spring 94. When the user releases the gripping portion, the protrusion of the tool holder 91 extends to the outside again under the action of the spring 94.

[0042] Furthermore, a cutting edge (not shown in the figure) is provided on the second groove wall of the cutting groove 95 of this embodiment, which is opposite to the first groove wall, and the cutting edge is opposite to the blade of the cutting knife 92. The knife holder 91 can drive the cutting knife 92 to be inserted into the cutting edge. When the bag opening of the fresh-keeping bag is inserted into the cutting edge, the user can pull the product, which can be used for cutting or opening the bag opening. By providing the cutting groove 95, not only the cutting effect is improved, but also the cutting knife 92 can be prevented from accidentally injuring the user.

[0043] In this way, the front ends of the two clamping arms of the fresh-keeping machine can be used for vacuuming and sealing, and the rear ends can be used for cutting bags, so that they are fully utilized.

[0044] like Figure 2 and Figure 3As shown, in some embodiments, the fresh-keeping machine also includes two parts: an air pump 4 and an air extraction hole 16.

[0045] The air pump 4 and the air extraction hole 16 are respectively arranged on the first clamping part 10, and the air extraction hole 16 is arranged in the area surrounded by the first annular sealing ring 15, and the air pump 4 is connected with the air extraction hole 16. When the two annular sealing rings are tightly fitted to form a vacuum zone, the vacuum zone can be vacuumed by the air pump 4, and then the air in the fresh-keeping bag is extracted to achieve a vacuum effect.

[0046] Preferably, the pump port of the air pump 4 of this embodiment is connected to the air suction nozzle 17, which is used to connect with the air suction hole 16 on the clamping part. The material of the air suction nozzle 17 is preferably soft material, so as to ensure the sealing between the air suction nozzle 17 and the air suction hole 16, and ensure that there is no air leakage when the two are connected.

[0047] like Figure 2 and Figure 3 As shown, in some embodiments, the fresh-keeping machine further includes a heating element 6 and a pressure strip 5. The heating element 6 is arranged on the first clamping part 10, and the pressure strip 5 is arranged on the second clamping part 20. When the two clamping parts clamp the fresh-keeping bag, the pressure strip 5 and the heating element 6 can be butted together, and the part of the fresh-keeping bag close to the bag opening is pressed against the heating element 6 through the pressure strip 5, and then the fresh-keeping bag can be heated by the heating element 6 to perform hot melt sealing, so that the fresh-keeping machine has a sealing function.

[0048] Preferably, the shape of the pressure strip 5 of this embodiment is compatible with the shape of the heating element 6, and a heating wire may be provided inside the heating element 6, and the heating element 6 has a heating function by energizing the heating wire.

[0049] The heating element 6 of this embodiment is located on the side of the first annular sealing ring 15 away from the pin 3, so that the fresh-keeping machine can heat and seal the bag opening of the fresh-keeping bag immediately after vacuuming the fresh-keeping belt, thereby improving the convenience of the fresh-keeping machine.

[0050] like Figure 2 and Figure 3 As shown, in some embodiments, the first gripping portion 11 of the first clamping arm 1 includes a gripping bottom shell 111 and a gripping upper cover 110. The gripping upper cover 110 is buckled on the gripping bottom shell 111 and forms a gripping cavity with the gripping bottom shell 111. A battery assembly 13 for respectively supplying power to the air pump 4 and the heating element 6 and a circuit board 14 for respectively controlling the operation of the air pump 4 and the heating element 6 are provided in the gripping cavity, thereby improving the space utilization rate inside the gripping portion.

[0051] The circuit board 14 of this embodiment is used to control the operation of the air pump 4 and the heating element 6 respectively. A pressure value Y can be set in the control program on the circuit board 14. When the circuit board 14 controls the vacuum pressure value of the air pump 4 to reach the program set value Y, the heat sealing function of the heating element 6 is automatically started, so that automatic and intelligent operation from vacuuming to sealing can be achieved.

[0052] like Figure 2 and Figure 3 As shown, in some embodiments, the second gripping portion 21 of the second clamping arm 2 includes a gripping lower cover, which defines a bottom shell cavity 24. When the gripping portions of the two clamping arms are close to each other, the first gripping portion 11 of the first clamping arm 1 can extend into the bottom shell cavity 24. This structure ensures the compactness of the fresh-keeping machine.

[0053] The first clamping part 10 includes a clamping bottom shell 101 and a clamping middle cover 100. The clamping middle cover 100 is buckled on the clamping bottom shell 101 and defines a second cavity with the clamping bottom shell 101. The air pump 4 is arranged in the second cavity, so that the internal space of the fresh-keeping machine can be well utilized.

[0054] Furthermore, in some embodiments, the second clamping portion 20 includes a clamping upper cover and a fixing frame 8 extending into the clamping upper cover, the clamping upper cover is used to buckle onto the clamping middle cover 100 , and the rotating frame 7 is rotatably connected to the fixing frame 8 via a rotating shaft 22 .

[0055] The first annular sealing ring 15 of this embodiment is fixedly arranged on the side of the clamping middle cover 100 facing the fixing frame 8, and the second annular sealing ring 23 is fixedly arranged on the fixing frame 8. The heating element 6 is arranged on the clamping middle cover 100, and the pressure strip 5 is arranged on the fixing frame 8.

[0056] like Figure 2 and Figure 3 As shown, in some embodiments, the first gripping portion 11 of the first clamping arm 1 is further provided with a linkage rod assembly 12, which is arranged in the gripping cavity, and the linkage rod also has a protrusion extending outside, and the linkage rod assembly 12 is used to control the battery assembly 13 to power on or off the air pump 4 and the heating element 6. When the two clamping arms rotate and close, the second gripping portion 21 can push against the protrusion on the linkage rod assembly 12 to enable the battery assembly 13 to power on the air pump 4 and the heating element 6 respectively. The linkage rod assembly 12 functions as a switch, and its specific structure and working principle belong to the prior art, which will not be described in detail in this embodiment.

[0057] The following is a detailed description of the use of the fresh-keeping machine:

[0058] like Figure 4As shown: when the two clamping arms are opened at an angle of α, the fresh-keeping bag can be placed between the two annular sealing rings. When vacuuming and sealing are required, the opening must be closed, that is, the handle is held and a force F1 is applied to the handle. The second clamping arm 2 rotates clockwise around the pin 3, and the first clamping arm 1 rotates counterclockwise around the pin 3. The opening is gradually closed and the angle α gradually decreases. According to the lever principle, the force mark on the front end is F2.

[0059] The closing process state of the two clamping arms is as follows: Figure 5 and Figure 6 As shown: the rear end section of the first annular seal ring 15 is marked as A1, and the front end section is marked as B1; the rear end section of the second annular seal ring 23 is marked as A2, and the front end section is marked as B2; when the two clamping arms are opened at an angle of β, A1 contacts A2, and A2 rises under the action of the force, driving the rotating frame 4 and the second annular seal ring 23 to rotate counterclockwise in the fixed frame 8, and B2 drops, and the balance adjustment begins.

[0060] That is, the above-mentioned fixed frame 8, rotating frame 5 and second annular sealing ring 23 form an automatic sealing balance adjustment mechanism.

[0061] The two clamping arms are in closed state, such as Figure 7 and Figure 8 As shown: Continue to rotate until the product is closed. Under the action of force F2, the automatic adjustment sealing balance mechanism rotates to a balanced state, with equal forces on both ends, marked as F3, and the second annular sealing ring 23 and the first annular sealing ring 15 are balanced and squeezed to achieve an ideal sealing effect. In addition, the heating element 6 can be controlled to heat and seal.

[0062] Multiple embodiments of the present application are described in detail above, but the present application is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications to the embodiments based on the concept of the present application, and these variations and modifications should all fall within the scope of protection required by the present application.

Claims

1. A fresh-keeping machine, comprising a first clamping arm (1) and a second clamping arm (2) which are rotatably connected, wherein a first clamping portion (10) of the first clamping arm (1) is provided with a first annular sealing ring (15), and a second clamping portion (20) of the second clamping arm (2) is provided with a second annular sealing ring (23) opposite to the first annular sealing ring (15), characterized in that: The fresh-keeping machine further comprises a rotating frame (7), wherein the rotating frame (7) is rotatably mounted on the second clamping portion (20), and the second annular sealing ring (23) is fixedly mounted on the rotating frame (7). When the second clamping arm (2) rotates relative to the first clamping arm (1), the rotating frame (7) can rotate relative to the second clamping portion (20), so that the two annular sealing rings can be sealed and butted.

2. A fresh-keeping machine as claimed in claim 1, characterized in that: The fresh-keeping machine also includes a knife assembly (9), which includes a knife seat (93), a knife holder (91) movably connected to the knife seat (93), and a cutting knife (92) arranged on the knife holder (91); the knife seat (93) is arranged on the first gripping portion (11) of the first clamping arm (1); when the second gripping portion (21) of the second clamping arm (2) is close to the first gripping portion (11) of the first clamping arm (1), the second gripping portion (21) can push the knife holder (91) to move relative to the knife seat (93), so as to cut the fresh-keeping bag through the cutting knife (92).

3. A fresh-keeping machine as claimed in claim 2, characterized in that: The knife holder (93) is provided with a cutting groove (95), the cutting knife (92) extends from a first groove wall of the cutting groove (95) into the interior thereof, a cutting edge is provided on a second groove wall of the cutting groove (95) opposite to the first groove wall, and the knife holder (91) can drive the cutting knife (92) to be inserted into the cutting edge to cut the fresh-keeping bag.

4. A fresh-keeping machine as claimed in claim 2, characterized in that: The fresh-keeping machine further comprises an air pump (4) and an air suction hole (16); the air pump (4) and the air suction hole (16) are arranged on the first clamping portion (10); the air suction hole (16) is arranged in an area surrounded by a first annular sealing ring (15); and the air pump (4) is in communication with the air suction hole (16).

5. A fresh-keeping machine as claimed in claim 4, characterized in that: The fresh-keeping machine further comprises a heating element (6) and a pressure strip (5); the heating element (6) is arranged on the first clamping portion (10), and the pressure strip (5) is arranged on the second clamping portion (20); the pressure strip (5) can be pressed against the heating element (6) to clamp the fresh-keeping bag, and the heating element (6) can perform hot-melt sealing on the fresh-keeping bag after being heated.

6. A fresh-keeping machine as claimed in claim 5, characterized in that: The first gripping portion (11) comprises a gripping bottom shell (111) and a gripping upper cover (110), wherein the gripping upper cover (110) is buckled onto the gripping bottom shell (111) and forms a gripping cavity with the gripping bottom shell (111), wherein a battery assembly (13) is provided in the gripping cavity for supplying power to the air pump (4) and the heating element (6), respectively.

7. A fresh-keeping machine as claimed in claim 6, characterized in that: The second gripping portion (21) comprises a gripping lower cover, the gripping lower cover defines a bottom shell cavity (24), and when the gripping portions of the two clamping arms are close to each other, the first gripping portion (11) can extend into the bottom shell cavity (24).

8. A fresh-keeping machine as claimed in claim 5, characterized in that: The first clamping portion (10) comprises a clamping bottom shell (101) and a clamping middle cover (100), wherein the clamping middle cover (100) is buckled onto the clamping bottom shell (101) and defines a second cavity with the clamping bottom shell (101), and the air pump (4) is disposed in the second cavity.

9. A fresh-keeping machine as claimed in claim 8, characterized in that: The second clamping portion (20) comprises a clamping upper cover and a fixing frame (8) extending into the clamping upper cover, the rotating frame (7) is rotatably connected to the fixing frame (8), the first annular sealing ring (15) is fixedly arranged on the clamping middle cover (100), and the second annular sealing ring (23) is fixedly arranged on the fixing frame (8).

10. A fresh-keeping machine as claimed in claim 9, characterized in that: The heating element (6) is arranged on the clamping middle cover (100), and the pressure strip (5) is arranged on the fixing frame (8). 。

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