CN212448870U

CN212448870U - Portable vacuum box

Info

Publication number: CN212448870U
Application number: CN202021009292.2U
Authority: CN
Inventors: 谢水旺; 周厚彬
Original assignee: ZHONGSHAN CAVALLO ELECTRICAL APPLIANCES CO Ltd
Current assignee: ZHONGSHAN CAVALLO ELECTRICAL APPLIANCES CO Ltd
Priority date: 2020-06-04
Filing date: 2020-06-04
Publication date: 2021-02-02
Anticipated expiration: 2030-06-04

Abstract

The utility model provides a portable vacuum box, including box, case lid, vacuum control system and at least one induction element, box open-top and be provided with the case lid sealing washer at the top, seal through the case lid sealing washer between case lid and the box, induction element sets up at this box top, and is located this case lid sealing washer below, the case lid sets up in this case lid sealing washer top and applys the extrusion force to this case lid sealing washer, induction element accepts the signal that comes from this case lid sealing washer and sends electric signal to vacuum control system, and then vacuum control system controls the atmospheric pressure in the box. The utility model discloses a simple cooperation between box and the case lid changes induction element's state, realizes the vacuum chamber at work and stops the automatic switch-over between two states, has degree of automation height, easy and simple to handle's characteristics.

Description

Portable vacuum box

Technical Field

The utility model belongs to the technical field of vacuum storing device, especially, relate to a portable vacuum box.

Background

The storage device is mainly used for storing food or moisture-proof articles. With the higher living standard of people, the quality requirement of pursuing life is improved, and in order to improve the food preservation effect of the storage device and the moisture and insect prevention of articles, the traditional storage device which simply seals the articles cannot meet the requirements of people due to poor sealing performance; the vacuum technology is scientific as the front edge, the environment of low oxygen can be caused, the oxidation of materials is reduced or avoided, therefore, the vacuum storage device takes place at the right moment, the interior of the storage device can be in a vacuum state, the food can be stored in the vacuum environment for a longer time due to the isolation of air, and the effects of moisture prevention, rat prevention and insect prevention of the precious objects stored in the vacuum box are more obvious.

At present, for a vacuum storage device, the work flow is that firstly, articles are placed in a storage bin, then a cover is covered, a switch is manually operated to enable a vacuum pump in the vacuum storage device to enter a working state, and a vacuumizing stage is started; when the cover needs to be opened, the switch is manually operated to enable the vacuum pump to enter a stop state, and then the cover is opened, so that the cover has the defects of troublesome operation and low automation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of above-mentioned prior art existence, provide a portable vacuum chamber, solved and needed manual operation switch just to make the vacuum pump get into work or the problem of off-state, had degree of automation height, characteristics easy and simple to handle.

The utility model provides a portable vacuum box, including box, case lid, vacuum control system and at least one induction element, box open-top and be provided with the case lid sealing washer at the top, seal through the case lid sealing washer between case lid and the box, induction element sets up at this box top, and is located this case lid sealing washer below, the case lid sets up in this case lid sealing washer top and applys the extrusion force to this case lid sealing washer, induction element accepts the signal that comes from this case lid sealing washer and sends electric signal to vacuum control system, and then vacuum control system controls the atmospheric pressure in the box.

Furthermore, the case cover is provided with at least one guide block, the top of the case body is also provided with a guide sliding groove which is used for limiting and guiding the up-and-down movement of the case cover and corresponds to the guide block, and the case cover moves downwards or upwards under the limiting matching of the guide block and the guide sliding groove.

Further, the vacuum box also comprises a power supply system and a gas valve assembly, the vacuum control system comprises a vacuum pump and a control system, the bottom of the box body also comprises a base, the top of the box body is provided with a sealing groove, the box cover sealing ring is arranged in the sealing groove, the box body is provided with an airflow through hole for gas circulation and communicated with the vacuum pump through a gas pipe, the gas valve assembly is used for switching the communication or isolation state of the box body and the external atmosphere, the vacuum pump, the control system and the power supply system are fixed through the base, the bottom of the sealing groove is provided with at least one second fixing through hole, the induction unit is fixed at the lower part of the second fixing through hole and is contacted with the box cover sealing ring through the second fixing through hole, and the induction unit receives signals from the box cover sealing ring and sends electric signals to the control system, and the control system controls the vacuum pump to work or stop, the induction unit, the vacuum pump and the power supply system are electrically connected with the control system respectively, and the power supply system is electrically connected with an external power supply.

Furthermore, the air valve assembly is fixed through a first fixing through hole formed in the top of the box cover.

Further, the box includes shell body and interior box, the wall department of box in this is seted up to the air current through-hole, the top of box in this is seted up to sealed recess, the top of interior box still is provided with at least one buckle groove, the buckle corresponding with this buckle groove is seted up at the top of shell body, the shell body passes through the mode of joint and realizes dismantling fixed connection with this interior box.

Further, the air valve assembly comprises an operation part, an air valve sealing sleeve, an air valve sealing ring, a sealing fixing block and a fixing pressing plate, wherein the sealing fixing block comprises a sealing fixing plate, a fixing shaft and a fixing boss, the fixing shaft is arranged at the center of the sealing fixing plate, the fixing boss is arranged around the fixing shaft, the outer wall of the fixing boss is matched with the inner wall of the first fixing through hole of the box cover in a limiting mode, at least two fixing screw seats are arranged on the fixing boss, a third fixing through hole corresponding to the fixing screw seats is formed in the fixing pressing plate, the fixing boss and the fixing pressing plate are respectively arranged on the lower side and the upper side of the first fixing through hole and are connected through screws, a protruding baffle plate is arranged on the outer edge of the sealing fixing plate, an air valve sealing groove for installing the air valve sealing ring is formed between the baffle plate and the fixing boss, the second end opening, the open-ended second end is linked together with this inner box, seted up first air vent on the wall of fixed axle, the outer wall of first end that the pneumatic valve seal cover was established at this fixed axle just sets up the second air vent corresponding with this first air vent, the operation portion cover is established at the outer wall of this pneumatic valve seal cover just sets up the third air vent corresponding with this second air vent, the operation portion can carry out the rotation along the center pin of this fixed axle.

Furthermore, the operating part is fixedly connected with the air valve sealing sleeve, and the opening directions of the second vent hole and the third vent hole are consistent; or the fixed shaft is fixedly connected with the air valve sealing sleeve, and the opening directions of the first vent hole and the second vent hole are consistent.

Further, the vacuum box also comprises an electromagnetic valve, the electromagnetic valve is fixed on the base, the electromagnetic valve is respectively connected with the airflow through hole and the vacuum pump through air pipes and used for communicating or cutting off the gas circulation state between the airflow through hole and the vacuum pump, and the electromagnetic valve is electrically connected with the control system.

Further, the vacuum box further comprises an air pressure detection element, the air flow hole is connected with a three-way joint, the electromagnetic valve and the air pressure detection element are respectively connected with the three-way joint through air pipes, and the air pressure detection element is electrically connected with the control system and used for detecting the pressure condition in the inner box body.

Further, the power supply system comprises a DC power supply interface and a battery assembly, the DC power supply interface is arranged on the outer wall surface of the base and used for being electrically connected with an external power supply, the DC power supply interface is electrically connected with the battery assembly, the battery assembly is fixed through the base and used for supplying power to each electric load in the vacuum box, and the battery assembly is electrically connected with the control system.

The utility model has the advantages that:

the utility model provides a portable vacuum box, including box, case lid, vacuum control system and at least one induction element, box open-top and be provided with the case lid sealing washer at the top, seal through the case lid sealing washer between case lid and the box, induction element sets up at this box top, and is located this case lid sealing washer below, the case lid sets up in this case lid sealing washer top and applys the extrusion force to this case lid sealing washer, induction element accepts the signal that comes from this case lid sealing washer and sends electric signal to vacuum control system, and then vacuum control system controls the atmospheric pressure in the box. When the box cover is placed at the top of the box body, the box cover presses the box cover sealing ring due to the self weight of the box cover or the pressure applied from the outside, the box cover sealing ring is further pressed on the sensing unit at the lower part of the box cover sealing ring, the sensing unit is triggered to send an electric signal to the vacuum control system so as to vacuumize the box body, and in the vacuumizing process, the air pressure in the box body is reduced, so that the pressure between the box cover and the box cover sealing ring is higher, and the sealing effect is better; when the pressure between the box cover and the box cover sealing ring is reduced, the induction unit is gradually reset and sends an electric signal to the vacuum control system, and then the vacuum control system stops working. The utility model discloses a simple cooperation between box and the case lid changes induction element's state, realizes the vacuum chamber at work and stops the automatic switch-over between two states, has degree of automation height, easy and simple to handle's characteristics.

Drawings

The present invention is further explained by using the drawings, but the embodiments in the drawings do not constitute any limitation to the present invention, and for those skilled in the art, other drawings can be obtained according to the following drawings without any inventive work.

Fig. 1 is a front sectional view of a portable vacuum box provided by the present invention.

Fig. 2 is an enlarged schematic view of a portion a of fig. 1 of a portable vacuum box provided by the present invention.

Fig. 3 is a bottom view of the portable vacuum box provided by the present invention.

Fig. 4 is a schematic structural diagram of a gas valve assembly of a portable vacuum box provided by the present invention in a connected state.

Fig. 5 is a schematic structural diagram of the air valve assembly of the portable vacuum box according to the present invention in a cut-off state.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1 to 5, the present embodiment provides a portable vacuum box, including a box body, a box cover 2, a base 3, a vacuum pump 4, a sensing unit 5, a control system 6, a power system and a pneumatic valve assembly 8, the box body has an open top and a sealing groove 13 at the top, the box cover 2 and the box body are sealed by a box cover sealing ring 14 installed in the sealing groove 13, the box body is provided with an airflow through hole 15 for air circulation and is communicated with the vacuum pump 4 through an air pipe via the airflow through hole 15, the pneumatic valve assembly 8 is used for switching the communication or isolation state of the box body with the external atmosphere, the base 3 is detachably installed at the bottom of the box body, the vacuum pump 4, the control system 6 and the power system are fixed by the base 3, the vacuum pump 4 is fixed at the base 3 by a vacuum pump pressing plate 41, and a shock absorption layer is disposed at a position, a second fixing through hole 16 is formed in the bottom of the sealing groove 13, the sensing unit 5 is fixed to the lower portion of the second fixing through hole 16, the sensing unit 5 comprises a telescopic rod, the telescopic rod extends into the second fixing through hole 16 and contacts with the box cover sealing ring 14, the sensing unit 5 is used for receiving signals from the box cover 2 and sending the signals to the control system 6 to control the vacuum pump 4 to work or stop, the sensing unit 5, the vacuum pump 4 and the power supply system are electrically connected with the control system 6 respectively, and the power supply system is electrically connected with an external power supply. Additionally, the sensing unit 5 is a single, piezoresistive pressure sensitive element of the GZP160 type.

The working principle of the embodiment is as follows: the air valve assembly 8 is operated to enable the box body to be in a state of being separated from the outside atmosphere, the box cover 2 is placed on the top of the box body, the box cover 2 extrudes the box cover sealing ring 14 due to the self weight of the box cover 2 or the pressure applied by the outside, the box cover sealing ring 14 extrudes the induction unit 5 fixed on the lower portion of the second fixing through hole 16, when the induction unit 5 is extruded to a certain degree, the induction unit 5 is triggered to send a signal to the control system 6 to control the vacuum pump 4 to work, after the vacuum pump 4 is in a working state, the pressure in the box body rapidly drops, the pressure between the box cover 2 and the box cover sealing ring 14 is enabled to be larger; the air valve assembly 8 is operated to enable the box body to be communicated with the outside atmosphere, the pressure between the box cover 2 and the box cover sealing ring 14 is reduced due to the fact that the air pressure in the box body rises, the extrusion degree of the induction unit 5 is reduced and gradually reset, and after the induction unit is reset to a certain degree, a signal is sent to the control system 6 to control the vacuum pump 4 to stop working. Whole process is swift, simple structure, and through induction element 5's state transformation, auto-induction goes up case lid 2 and carries out evacuation in to the box or opens case lid 2 and external intercommunication, and degree of automation is high.

As another embodiment, unlike a method of directly placing the cover 2 on the top of the case and applying pressure thereto, the present embodiment is to rotate the cover 2 to a specific position to trigger the operation or non-operation of the sensing unit 5. The case lid 2 is provided with at least one guide block, and the box top still is provided with the direction spout that is used for carrying out spacing direction, corresponding with this guide block to reciprocating of case lid 2, and when case lid 2 moved down and triggered this induction element 5 under this guide block and the cooperation of direction spout, vacuum pump 4 worked.

The working principle of the embodiment is as follows: the box cover 2 is placed at the top of the box body, the guide block is clamped into the guide sliding groove, the box cover 2 is rotated along the first direction, the box cover 2 and the box cover sealing ring 14 are extruded more tightly under the guide of the guide sliding groove, the sealing effect is better, and after the box cover 2 is rotated to a designated position, the box cover 2 extrudes the induction unit 5 through the box cover sealing ring 14 to realize triggering action; when the box cover 2 is rotated along the direction opposite to the first direction, under the guidance of the guide sliding groove, the extrusion force between the box cover 2 and the box cover sealing ring 14 is reduced, the sealing state is released, and the induction unit 5 is gradually reset; by rotating the tank cover 2 in both directions, switching between the two states of operating or stopping the vacuum tank is achieved.

The preferred structure of the lid gasket 14 is: the bottom is a base with an H-shaped structure, and the top is a baffle strip extending from a single side; the box cover sealing ring 14 is arranged in the sealing groove 13, the box cover 2 is directly contacted with the barrier strips and extrudes the barrier strips, the barrier strips and the box cover 2 form a completely sealed connection relation, the box cover sealing ring 14 is deformed when the barrier strips are subjected to extrusion force, so that the cross bar structure in the base is downward concave, the box cover sealing ring 14 is contacted with the induction unit 5 through the deformation of the box cover sealing ring 14, and the effect of transmitting signals is achieved.

As another structure of the box cover sealing ring, a section of slender structure extends downwards from the cross-bar structure part of the base of the H-shaped structure, and the slender structure is in contact with the sensing unit 5.

Preferably, the top of the box cover 2 is provided with a first fixing through hole 21, the air valve assembly 8 is fixed through the first fixing through hole 21, and the air valve assembly 8 can be directly operated at the top, so that the switching of the communication or isolation state of the box body and the external atmosphere is realized.

Referring to fig. 1, in this embodiment, the box includes an outer shell 11 and an inner box 12, an airflow through hole 15 is provided in a wall surface of the inner box 12, a sealing groove 13 is provided in a top of the inner box 12, the top of the inner box 12 is further provided with at least one fastening groove 17, a fastening 18 corresponding to the fastening groove 17 is provided at the top of the outer shell 11, and the outer shell 11 is detachably and fixedly connected with the inner box 12 in a fastening manner. In addition, at least one reinforcing rib 19 for improving the strength of the outer box body is arranged on the inner wall surface of the outer box body. Through set up shell body 11 outside including box 12, because shell body 11 is to atmospheric barrier effect, effectively reduced the pressure differential of the wall both sides that interior box 12 erect, interior box 12 erect the wall from down up have certain inclination, and slightly to the direction of shell body 11 divergence slope, consequently when external atmospheric pressure is greater than the atmospheric pressure in interior box 12, improved the intensity that interior box 12 erect the wall, avoid the too big wall deformation that leads to of pressure differential.

Referring to fig. 4 and 5, in this embodiment, the air valve assembly 8 includes an operating portion 81, an air valve sealing sleeve 82, an air valve sealing ring 83, a sealing fixing block and a fixing plate 85, the sealing fixing block includes a sealing fixing plate 841, a fixing shaft 842 and a fixing boss 843, the fixing shaft 842 is disposed at the center of the sealing fixing plate 841, the fixing boss 843 is disposed around the fixing shaft 842, and the outer wall of the fixing boss 843 is matched and limited with the inner wall of the first fixing through hole 21 of the case cover 2, the fixing boss 843 is provided with at least two fixing screw seats 844, the fixing plate 85 is provided with a third fixing through hole 845 corresponding to the fixing screw seats 844, the fixing boss 843 and the fixing plate 85 are respectively disposed at the lower side and the upper side of the first fixing through hole 21 and connected by screws, a protruding baffle 846 is disposed at the outer edge of the sealing fixing plate 841, and an air valve sealing groove 847 for installing the air valve, the first end of the fixed shaft 842 is sealed, the second end of the fixed shaft 842 is open, the second end of the open is communicated with the inner box body 12, the wall surface of the fixed shaft 842 is provided with a first vent hole 86, the air valve sealing sleeve 82 is sleeved on the outer wall surface of the first end of the fixed shaft 842 and is provided with a second vent hole 87 corresponding to the first vent hole 86, the operating part 81 is sleeved on the outer wall surface of the air valve sealing sleeve 82 and is provided with a third vent hole 88 corresponding to the second vent hole 87, and the operating part 81 can rotate along the central axis of the fixed shaft 842.

This air valve assembly 8's mounting means and theory of operation: to seal the fixed block from the first fixed through hole 21 of case lid 2 from down up placing, the outer wall of the fixed boss 843 on the sealed fixed block cooperatees spacingly with the inner wall of first fixed through hole 21, install the protruding baffle 846 of air valve sealing washer 83 protrusion in the outer edge of sealed fixed plate 841 on air valve seal groove 847 simultaneously, place solid fixed pressing plate 85 above case lid 2, and place third fixed through hole 845 corresponding fixed screw seat 844 on the fixed boss 843, connect fixedly through the screw, air valve sealing washer 83 on the fixed good back air valve seal groove 847 and the bottom zonulae occludens of case lid 2, cover air valve seal cover 82 and operating portion 81 respectively toward on the fixed axle 842 again.

As an embodiment, the operation part 81 is fixedly connected with the air valve sealing sleeve 82, the opening directions of the second vent hole 87 and the third vent hole 88 are consistent, the operation part 81 and the air valve sealing sleeve 82 are fixed into a whole, and when the second vent hole 87 and the third vent hole 88 are synchronously rotated to the same direction as the first vent hole 86, the inner box body 12 is communicated with the outside atmosphere; when the second vent hole 87 and the third vent hole 88 are rotated in a direction to be shifted from the first vent hole 86 in synchronization, the inner casing 12 is blocked from the outside atmosphere.

As another embodiment, the fixing shaft 842 is fixedly connected with the air valve sealing sleeve 82, the opening directions of the first vent hole 86 and the second vent hole 87 are consistent, the fixing shaft 842 and the air valve sealing sleeve 82 are fixed into a whole, and when the third vent hole 88 is rotated to the same direction as the first vent hole 86 and the second vent hole 87, the inner box body 12 is communicated with the outside atmosphere; when the third vent hole 88 is rotated to a direction opposite to the first vent hole 86 and the second vent hole 87, the inner case 12 is blocked from the external atmosphere.

In this embodiment, the vacuum box still includes solenoid valve 9 and atmospheric pressure detecting element, solenoid valve 9 is fixed on base 3, air flow hole 15 is connected with three way connection, three way connection connects air flow hole 15 respectively, solenoid valve 9 and atmospheric pressure detecting element, solenoid valve 9 rethread trachea is connected with vacuum pump 4, solenoid valve 9 carries out the electricity with this control system 6 and is connected, and be used for the intercommunication or cut off the gas flow state between this air flow hole 15 and the vacuum pump 4, atmospheric pressure detecting element carries out the electricity with this control system 6 and is connected, and be used for detecting the pressure condition in interior box 12.

Referring to fig. 1 and 3, in this embodiment, the power supply system includes a DC power interface and a battery assembly, the DC power interface is a USB power interface 71, the battery assembly is a lithium battery assembly 72, the USB power interface 71 is disposed on an outer wall surface of the base 3 and is configured to be electrically connected to an external power supply, the USB power interface 71 is electrically connected to the lithium battery assembly 72, the lithium battery assembly 72 is fixed by the base 3 and is configured to supply power to each electric load in the vacuum chamber, and the lithium battery assembly 72 is electrically connected to the control system 6. The external power supply is electrically connected with the lithium battery pack 72 through the USB power interface 71, the lithium battery pack 72 is charged, when the charging is completed or reaches a certain amount, the USB power interface 71 is pulled out, the lithium battery pack 72 supplies power independently to realize the work of the vacuum box, and the lithium battery pack 72 supplies power to each power load through the control system 6.

Compared with the prior art, the utility model provides a portable vacuum box, including box, case lid 2, vacuum control system and induction element 5, box open-top and be provided with case lid sealing washer 14 at the top, seal through case lid sealing washer 14 between case lid 2 and the box, induction element 5 sets up at this box top, and is located this case lid sealing washer 14 below, case lid 2 sets up in this case lid sealing washer 14 top and applys the extrusion force to this case lid sealing washer 14, induction element 5 accepts the signal that comes from this case lid sealing washer 14 and sends electric signal to vacuum control system, and then vacuum control system controls the atmospheric pressure in the box. When the box cover 2 is placed at the top of the box body, the box cover 2 presses the box cover sealing ring 14 due to the self weight of the box cover 2 or the pressure applied from the outside, the box cover sealing ring 14 is further pressed on the sensing unit 5 at the lower part of the box cover sealing ring, the sensing unit 5 is triggered to send an electric signal to the vacuum control system so as to vacuumize the box body, and in the vacuumizing process, the air pressure in the box body is reduced, so that the pressure between the box cover 2 and the box cover sealing ring 14 is higher, and the sealing effect is better; when the pressure between the box cover 2 and the box cover sealing ring 14 is reduced, the sensing unit 5 is gradually reset and sends an electric signal to the vacuum control system, and then the vacuum control system stops working. The utility model discloses a simple cooperation between box and case lid 2 changes the state of induction element 5, realizes the vacuum chamber at work and stops the automatic switch-over between two states, has degree of automation height, characteristics easy and simple to handle.

Finally, it should be emphasized that the present invention is not limited to the above-described embodiments, but only to the preferred embodiments of the invention, and is not limited to the embodiments, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included within the scope of the present invention.

Claims

1. The utility model provides a portable vacuum box, its characterized in that, includes box, case lid, vacuum control system and at least one induction element, box open-top and be provided with the case lid sealing washer at the top, seal through the case lid sealing washer between case lid and the box, induction element sets up at this box top, and is located this case lid sealing washer below, the case lid sets up in this case lid sealing washer top and applys the extrusion force to this case lid sealing washer, induction element receives the signal that comes from this case lid sealing washer and sends electric signal to vacuum control system, and then vacuum control system controls the atmospheric pressure in the box.

2. The vacuum box according to claim 1, wherein the cover is provided with at least one guide block, the top of the box body is further provided with a guide sliding groove corresponding to the guide block for limiting and guiding the up and down movement of the cover, and the cover is moved down or up by the limit fit of the guide block and the guide sliding groove.

3. The vacuum box according to claim 1 or 2, wherein the vacuum box further comprises a power supply system and a gas valve assembly, the vacuum control system comprises a vacuum pump and a control system, the bottom of the box body further comprises a base, the top of the box body is provided with a sealing groove, the box cover sealing ring is installed in the sealing groove, the box body is provided with a gas flow through hole for gas circulation and is communicated with the vacuum pump through a gas pipe through the gas flow through hole, the gas valve assembly is used for switching the communication or isolation state of the box body and the external atmosphere, the vacuum pump, the control system and the power supply system are fixed through the base, the bottom of the sealing groove is provided with at least one second fixing through hole, the sensing unit is fixed at the lower part of the second fixing through hole and is in contact with the box cover sealing ring through the second fixing through hole, the induction unit receives a signal from the box cover sealing ring and sends a power signal to the control system, the control system controls the vacuum pump to work or stop, the induction unit, the vacuum pump and the power system are electrically connected with the control system respectively, and the power system is electrically connected with an external power supply.

4. A vacuum chamber as defined in claim 3 wherein the air valve assembly is secured by a first securing through hole provided in the top of the chamber cover.

5. The vacuum box according to claim 3, wherein the box body comprises an outer shell and an inner box body, the air flow through hole is formed in the wall surface of the inner box body, the sealing groove is formed in the top of the inner box body, at least one clamping groove is further formed in the top of the inner box body, a clamping buckle corresponding to the clamping groove is formed in the top of the outer shell, and the outer shell is detachably and fixedly connected with the inner box body in a clamping mode.

6. The vacuum box according to claim 5, wherein the air valve assembly comprises an operating part, an air valve sealing sleeve, an air valve sealing ring, a sealing fixing block and a fixing pressing plate, the sealing fixing block comprises a sealing fixing plate, a fixing shaft and a fixing boss, the fixing shaft is arranged at the center of the sealing fixing plate, the fixing boss is arranged around the fixing shaft, the outer wall of the fixing boss is matched with and limited by the inner wall of the first fixing through hole of the box cover, at least two fixing screw seats are arranged on the fixing boss, a third fixing through hole corresponding to the fixing screw seats is arranged on the fixing pressing plate, the fixing boss and the fixing pressing plate are respectively arranged at the lower side and the upper side of the first fixing through hole and are connected through screws, a raised baffle is arranged at the outer edge of the sealing fixing plate, and an air valve sealing groove for installing the air valve sealing ring is arranged between the baffle and the fixing boss, the first end of the fixed shaft is sealed, the second end of the fixed shaft is opened, the second end of the opening is communicated with the inner box body, a first air vent is formed in the wall surface of the fixed shaft, the air valve sealing sleeve is sleeved on the outer wall surface of the first end of the fixed shaft and provided with a second air vent corresponding to the first air vent, the operating part is sleeved on the outer wall surface of the air valve sealing sleeve and provided with a third air vent corresponding to the second air vent, and the operating part can rotate along the central shaft of the fixed shaft.

7. The vacuum box according to claim 6, wherein the operating part is fixedly connected with the gas valve sealing sleeve, and the opening directions of the second vent hole and the third vent hole are consistent; or the fixed shaft is fixedly connected with the air valve sealing sleeve, and the opening directions of the first vent hole and the second vent hole are consistent.

8. The vacuum box according to claim 6, further comprising a solenoid valve fixed to the base, the solenoid valve being connected to the gas flow hole and the vacuum pump through a gas pipe, respectively, and being used to connect or disconnect a gas communication state between the gas flow hole and the vacuum pump, the solenoid valve being electrically connected to the control system.

9. The vacuum box according to claim 8, further comprising an air pressure detecting element, wherein the air flow hole is connected with a three-way joint, the solenoid valve and the air pressure detecting element are respectively connected with the three-way joint through an air pipe, and the air pressure detecting element is electrically connected with the control system and is used for detecting the pressure condition in the inner box body.

10. The vacuum box according to claim 9, wherein the power supply system comprises a DC power supply interface and a battery assembly, the DC power supply interface is disposed on the outer wall surface of the base and is configured to be electrically connected to an external power supply, the DC power supply interface is electrically connected to the battery assembly, the battery assembly is fixed by the base and is configured to supply power to each electric load in the vacuum box, and the battery assembly is electrically connected to the control system.