A hand-held vacuum preserver

Abstract

A handheld vacuum fresh-keeping machine, comprising a shell, and an outer cover combined with the lower end of the shell and used to hide the suction nozzle cover, a connecting inner liner is arranged in the shell, the lower end of the inner liner is connected with a cover connecting piece used to arrange the suction nozzle cover, an air pump used to provide suction strength is arranged above the cover connecting piece, a PCB mainboard is arranged above the air pump, and a battery compartment is arranged at the side of the PCB mainboard, the air outlet end and the air inlet end of the cover connecting piece are connected with the air inlet end and the air outlet end of the air pump, an electromagnetic valve is arranged on the PCB mainboard, the air inlet end of the electromagnetic valve is connected with the mixed gas outlet end of the air pump and the gas shunt end of the cover connecting piece through a three-way joint, the mixed gas outlet end of the air pump is connected with the air outlet end of the electromagnetic valve and the three-way joint arranged at the air inlet end of the electromagnetic valve through a two-way joint, and a liquid isolation component capable of avoiding liquid from being sucked together during air suction is arranged in the suction nozzle cover. The liquid entering the air pump together with the gas can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a handheld vacuum preservation machine. Background Technology

[0002] Vacuum packaging involves placing food in a bag and removing the gas inside to prevent spoilage. Food spoilage is mainly caused by the activity of microorganisms, and most microorganisms require oxygen to survive. Vacuum packaging uses this principle to remove oxygen from the packaging bag and food cells, depriving microorganisms of their "living environment." Most existing vacuum machines are handheld or relatively large, making them inconvenient to use.

[0003] Publication (Announcement) No.: CN219172765U discloses a mini vacuum machine, including an outer cylinder, a lower shell installed at the bottom of the outer cylinder, a suction nozzle unit installed on the lower shell, an inner frame installed inside the outer cylinder, a vacuum pump installed on the inner frame near the bottom, the air inlet of the vacuum pump being connected to the lower shell through a one-way valve unit, an exhaust port opened on one side of the outer cylinder, the air outlet of the vacuum pump being connected to the exhaust port through an exhaust pipe, and a battery and a PCB motherboard installed on the inner frame near the top. The board and vacuum pump are electrically connected. A power display unit and buttons are installed on one side of the PCB motherboard. A clearance hole is opened on one side of the inner frame and the outer cylinder. One side of the button passes through the clearance hole and extends to the outside of the outer cylinder. A sealing clip is installed on the outer wall of the outer cylinder on the side of the button via a spring sheet. The sealing clip is at a certain angle to the outer cylinder. One side of the sealing clip matches the outer wall of the outer cylinder. A top cover is installed on the top of the outer cylinder. A Type-C interface is installed on the top side of the PCB motherboard. A clearance hole is opened on the top cover. This type of vacuum cleaner uses a vacuum pump to create a vacuum in the vacuum bag or food storage container. When no gas flows out through the one-way valve, the vacuum pump will automatically shut off, increasing safety. However, it has a drawback: there is no safety measure to isolate liquids. This is because the food stored in the vacuum bag or food storage container may contain moisture. Even after wiping with kitchen paper towels or draining, some moisture may still remain inside the food. This causes a small amount of moisture to enter the vacuum pump when it is pumping air. Over time, this moisture will damage the vacuum pump, thus reducing the lifespan of the vacuum cleaner. Utility Model Content

[0004] This invention aims to overcome the shortcomings of the prior art by providing a handheld vacuum preservation machine to solve the aforementioned problems.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: This handheld vacuum preservation machine includes a shell and an outer cover that covers the lower end of the shell and hides the suction nozzle sleeve. A connecting liner is provided inside the shell. The lower end of the liner is connected to a sleeve connector for setting the suction nozzle sleeve, an air pump located above the sleeve connector for providing suction force, a PCB main board located above the air pump, and a battery compartment located on the side of the PCB main board. The air outlet and air inlet of the sleeve connector are connected to the air inlet and air outlet of the air pump. A solenoid valve is provided on the PCB main board. The air inlet of the solenoid valve is connected to the mixing air outlet of the air pump and the gas branching end of the sleeve connector through a three-way connector. The mixing air outlet of the air pump is connected to the air outlet of the solenoid valve and the three-way connector located at the air inlet of the solenoid valve through a two-way connector. A liquid isolation component is provided inside the suction nozzle sleeve to prevent liquid from being sucked in during suction.

[0006] Further improvements are made to the connecting piece, which has a first partition, a first upper baffle, and a first lower baffle. The first partition has a first connecting cavity formed synchronously by protruding upwards at its central position. The suction nozzle sleeve is connected to the first connecting cavity. The first upper baffle abuts against the lower end of the inner liner. After the suction nozzle sleeve and the first connecting cavity are connected, a gap is formed between the inner circumferential surface of the first lower baffle and the suction nozzle sleeve. The first partition has an air vent located within this gap. The first lower baffle is also used to connect the outer cover.

[0007] Further improvements include the installation of the air inlet and gas branching ends of the connecting piece on the upward protruding part of the first partition, the air outlet on the first partition, and an air flow connector between the air outlet and the air pump outlet.

[0008] Further improvements were made to the air-flow connector, which has an L-shaped configuration and contains a first guide channel, a turning channel, and a second guide channel. The first guide channel is used to insert the air outlet end of the air pump, and the second guide channel is used to insert the air inlet end of the connector. The turning channel is used to connect the first guide channel and the second guide channel.

[0009] Further improvements include a lower connecting plate at the lower end of the liner, a connecting bracket at the middle end, and an upper connecting plate at the upper end. The lower connecting plate abuts against the first upper enclosure and is connected to the sleeve connector by bolts, forming a first through groove through which the air outlet and gas branch end of the sleeve connector pass, and a second through groove through which the air inlet and air outlet connector of the sleeve connector are placed. The connecting bracket has a pre-connection part and a final connection part. The pre-connection part limits its assembly position in the liner after the air pump is inserted and can be snapped in during insertion. The final connection part is connected to the pre-connection part by bolts after the air pump is inserted into the pre-connection part. The upper connecting plate is connected to the battery compartment by bolts and forms a third through groove through which the compartment body of the battery compartment passes.

[0010] Further improvements include a nozzle sleeve comprising an outer sleeve and an air nozzle. The outer sleeve has a second partition, a second upper baffle, and a second lower baffle. The second upper baffle enters into the first connecting cavity to connect with the sleeve connector. A connecting sleeve is provided at the center of the second partition, and an air hole is provided around the connecting sleeve to allow gas to pass through. An air passage chamber is formed inside the second lower baffle, and the air nozzle and liquid isolation assembly are disposed in the air passage chamber.

[0011] Further improvements include setting the liquid isolation component as a magnetic induction component, which is intermittently inserted with the connecting sleeve and will move to block the air hole due to the influence of the liquid. It also allows the operation of the air pump to be disconnected by magnetic identification while blocking the air hole.

[0012] Further improvements include setting the liquid isolation component as a liquid sensing component, which does not engage with the connecting sleeve and is electrically connected to the second partition and the PCB board. One end of the component extends into the air passage chamber to directly disconnect the operation of the air pump by identifying liquid.

[0013] In a further improvement, the liquid isolation component is configured as a direct blocking member, which does not engage with the connecting sleeve and is located within the air passage chamber, so as to block the liquid carried by gas through the liquid isolation component while allowing the gas to pass through.

[0014] The beneficial effects of this utility model are:

[0015] This invention utilizes a liquid isolation component to isolate the liquid, thereby preventing the liquid from entering the air pump along with the gas. Liquid entering the air pump can cause damage to the air pump, and isolating the liquid from entering can reduce the damage rate of the air pump. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the concealed shell and outer cover of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the connecting piece of this utility model;

[0019] Figure 4 The following is a structural schematic diagram of this utility model;

[0020] Figure 5 This is a full cross-sectional structural diagram of the venting connector of this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the liner of this utility model;

[0022] Figure 7This is a schematic diagram of the full cross-section of the present invention, in which the shell is hidden;

[0023] Figure 8 This is a schematic diagram of the structure of the float of this utility model;

[0024] Figure 9 This is a full sectional structural diagram of the present invention, used to illustrate another structural form of the liquid isolation component;

[0025] Figure 10 This is a full sectional structural diagram of the present invention, used to illustrate another structural form of the liquid isolation component. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] Referring to the attached diagram: This handheld vacuum food preservation machine includes a housing 1 and an outer cover 2 that covers the lower end of the housing 1 and conceals the suction nozzle sleeve 3. Inside the housing 1, there is a connecting liner 4. The lower end of the liner 4 is connected to a sleeve connector 5 for mounting the suction nozzle sleeve 3, an air pump 6 located above the sleeve connector 5 and providing suction power, a PCB mainboard 7 located above the air pump 6, and a battery compartment 8 located on the side of the PCB mainboard 7. The air outlet 54 and air inlet 55 of the sleeve connector 5 are connected to the air pump 6. The air inlet 61 and air outlet 62 are connected. A solenoid valve 9 is provided on the PCB main board 7. The air inlet 91 of the solenoid valve 9 is connected to the air mixing outlet 63 of the air pump 6 and the gas branch end 56 of the sleeve connector 5 through a three-way connector. The air mixing outlet 63 of the air pump 6 is connected to the air outlet 92 of the solenoid valve 9 and the three-way connector provided on the air inlet 91 of the solenoid valve 9 through a two-way connector. A liquid isolation component 10 is provided in the nozzle sleeve 3 to prevent liquid from being sucked in during suction. The principle of this utility model is that after the inner liner 4 is connected to the sleeve connector 5, air pump 6, PCB motherboard 7, and battery compartment 8, it is installed into the housing 1. The outer cover 2 is connected to the housing 1 and protects the suction nozzle sleeve 3 set on the sleeve connector 2, which can prevent the silicone part of the suction nozzle sleeve 3 from hardening when not in use. The solenoid valve 9 has a negative pressure sensing function and can control the inflow or outflow of gas. When pumping air, the suction nozzle sleeve 3 acts on the object to be pumped. Then, the start switch is pressed, the air pump 6 and solenoid valve 9 are started. The gas entering from the air inlet 61 of the air pump 6 will enter one of the air paths of the solenoid valve 9 through the mixing outlet 63. Some gas will enter another gas path of solenoid valve 9 through gas branch end 56. When the gas negative pressure is sensed to be higher than the set value (i.e., the gas volume increases), the solenoid valve 9 closes its inlet end and opens its outlet end under the control of the system. At this time, the air pump 6 also stops pumping and switches to exhaust, so that the pumped gas is discharged. When the gas negative pressure is lower than the set value, the air pump 6 is controlled to stop working. At the same time, during the pumping process, the liquid isolation component 10 can also be used to isolate the liquid, which can prevent the liquid from entering the air pump 6 along with the gas. Because if the liquid enters the air pump 6, it will cause damage to the air pump 6. Isolating the entry of liquid can reduce the damage rate of the air pump.

[0028] The sleeve connector 5 has a first partition 51, a first upper baffle 52, and a first lower baffle 53. The first partition 51 has a first connecting cavity 511 formed synchronously by an upward protrusion at its central position. The suction nozzle sleeve 3 is connected to the first connecting cavity 511. The first upper baffle 52 abuts against the lower end of the inner liner 4. After the suction nozzle sleeve 3 and the first connecting cavity 511 are connected, a gap is formed between the inner circumferential surface of the first lower baffle 53 and the suction nozzle sleeve 3. The first partition 51 has an air vent 512 located within this gap. The first lower baffle 53 also serves to connect to the outer cover 2. This arrangement allows the sleeve connector to have a portion that connects to the inner liner 4. It also has a part that connects to the nozzle sleeve 3. The first upper baffle 52 forms the outer perimeter, so that it is integrated with the outer perimeter of the inner liner 4. When they are installed together into the housing 1, there will be no interference. The first upper baffle 52 is also used to set the bolt connection column, which can increase the structural strength of the bolt connection column, that is, it can withstand more force and is not easily damaged. The first lower baffle 53 is used to connect to the outer cover 2, and it also forms a gap through the size difference. This gap can increase the exhaust space, that is, the gas discharged from the vent 512 will not flow in a single direction, but will enter the space and be distributed from multiple directions, thereby increasing the exhaust efficiency.

[0029] The air inlet 55 and the gas branch end 56 of the sleeve connector 5 are both located on the upward protruding part of the first partition 51, and the air outlet 54 is located on the first partition 51. An air flow connector 20 is provided between the air outlet 54 and the air outlet 62 of the air pump 6. Since the location of the air outlet 512 (the air outlet 62 is used to guide the gas into the air outlet 512) is misaligned with the location of the air inlet 55 of the sleeve connector 5, the air flow connector 20 is used to connect the two to make up for the misalignment and to accurately guide the gas to the air outlet 512.

[0030] The air-flow connector 20 has an L-shaped configuration, and its interior has a first guide channel 201, a turning channel 202, and a second guide channel 203. The first guide channel 201 is into which the air outlet end of the air pump 6 is inserted, and the second guide channel 203 is into which the air inlet end of the connector 5 is inserted. The turning channel 202 is used to connect the first guide channel 201 and the second guide channel 203. This arrangement allows the air-flow connector 20 to accurately guide the gas to the air outlet 512. That is, the first guide channel 201 is vertically arranged, consistent with the extension direction of the air outlet end 62 of the air pump 6, so that the air outlet end 62 of the air pump 6 can be inserted into the first guide channel 201. Within the first guide channel 201, the second guide channel 203 is arranged horizontally, with the extension direction of the connecting portion of the air outlet 54 on the first partition 51 being consistent. In this way, the air outlet 54 can be inserted into the second guide channel 203. The turning channel 202 makes the first guide channel 201 and the second guide channel 203 continuous, and the turning channel 202 is arc-shaped, so the gas can be accurately guided into the second guide channel 203. The air outlet on the first partition 51 is also L-shaped, that is, its horizontal section is inserted into the second guide channel 203, and its vertical section is interconnected with the air outlet 512.

[0031] The liner 4 has a lower connecting plate 41 at its lower end, a connecting bracket 42 at its middle end, and an upper connecting plate 43 at its upper end. The lower connecting plate 41 abuts against the first upper enclosure 52 and is connected to the sleeve connector 5 by bolts. It forms a first through groove 411 through which the air outlet end and gas branch end of the sleeve connector 5 pass, and a second through groove 412 through which the air inlet end and air outlet connector 20 of the sleeve connector 5 are placed. The connecting bracket 42 has a pre-connection part 421 and a final connection part 422. The pre-connection part 421 is located in the air pump 6. After insertion, its assembly position within the liner 4 is defined, and it can be snapped together during insertion. The final connecting part 422 is connected to the pre-connecting part 421 via bolts after the air pump 6 inserts the pre-connecting part 421. The upper connecting plate 43 is connected to the battery compartment 8 via bolts and forms a third through groove 431 for the passage of the battery compartment 8's body portion. This arrangement allows the liner 4 to have a portion connected to the sleeve connector 5, a portion connected to the air pump 6, and a portion connected to the battery compartment 8. The lower connecting plate 41 is used to connect to the sleeve. The connecting piece 5 has several bolt holes located at its corners. The connecting piece 5 has connecting posts that match the positions of these bolt holes. The first through groove 411 and the second through groove 412 are designed to facilitate the connection of the outlet end 54 of the connecting piece 5 to the inlet end 61 of the air pump 6, the gas branch end 56 of the connecting piece 5 to the connecting pipe, and the air inlet end 55 of the connecting piece 5 to the air outlet connecting piece 20, allowing them to connect. The connecting bracket 42 is used to fix the air pump 6. The pre-connection part 421 allows the air pump 6 to be snapped into place. The final connection part 422, after being snapped into place, is bolted to the pre-connection part 421 to confine the air pump 6 inside, thereby ensuring the stable installation of the air pump 6. The upper connecting plate 43 is used to connect the battery compartment 8. The connection method is the same as that of the lower connecting plate 41 connecting sleeve connector 5, which is bolted together. The third through slot 431 allows the compartment part to pass through. The battery compartment 8 consists of a compartment part and a cap part. The cap part is used to cover the device cover, giving the refrigeration machine a sense of unity.

[0032] The nozzle sleeve 3 includes an outer sleeve 31 and an air nozzle 32. The outer sleeve 31 has a second partition 311, a second upper baffle 312, and a second lower baffle 313. The second upper baffle 312 enters the first connecting cavity 511 to connect with the sleeve connector 5. A connecting sleeve 3111 is provided at the center of the second partition 311, and an air hole 3112 surrounds the connecting sleeve 3111 and allows gas to pass through. An air passage cavity 3131 is formed in the second lower baffle 313. The air nozzle 32 and the liquid isolation component 10 are disposed in the air passage cavity 3131. The outer sleeve 31 is used to connect itself with the sleeve connector 5, specifically by the second upper baffle 312 when it enters the first connecting cavity 511. The inner circumferential surface is threaded, and the second partition 311 is used to form an air hole 3112. The air hole 3112 is used to ventilate when the air pump 6 is drawing air, so that the gas enters the first connecting cavity 511 and then leaves through the air outlet on the sleeve connector 5 and enters the air pump 6. The second lower enclosure 313 is used to form an air passage cavity 3131. The air passage cavity 3131 allows the drawn gas to pass through and is also used to set the air nozzle 32 and the liquid isolation component 10. The air nozzle 32 is made of rubber, and when placed inside, it can be stably placed inside by its material. The liquid isolation component 10 is located above the air nozzle 32. It is used to prevent liquid from entering the air pump 6 with the gas, because the entry of liquid will cause damage to the air pump 6, thus reducing the damage rate of the machine.

[0033] The liquid isolation component 10 is configured as a magnetic induction member, which is intermittently inserted into the connecting sleeve 3111. It moves under the influence of liquid to block the vent 3112, and allows the operation of the air pump 6 to be disconnected simultaneously by magnetic identification while blocking the vent 3112. This liquid isolation component 10 includes a float 101, a plug 102, and a compressible spring 103. The float 101 has several external ears 1011 distributed circumferentially on its outer peripheral surface, and a second connecting cavity 1012 formed synchronously by protruding downwards at its central position. The outer end face of 1011 fits against the inner circumferential surface of the air passage 3131, and a gap for gas passage is formed between two adjacent outer ears 1011. A plug 10121 is provided in the second connecting cavity 1012. The plug 10121 is clearance-fitted with the connecting sleeve 3111. The plug 102 is placed in the second connecting cavity 1012 and transitionally fits with the plug 10121 to block or not block the air hole 3112. One end of the spring 103 is supported on the lower end face of the second partition 311, and the other end is supported on the upper end face of the plug 102. The float 101 is located on its downward protruding part. A counterweight 1013 is provided on the lower end face of the valve 102, and a magnet 1014 is provided on its upper end face. The float 101 is used to drive the plug 102 and the magnet 1014 to move up and down. The movement of the float 101 is affected by the liquid. That is, when no liquid enters, the float 101 remains in contact with the air nozzle 32. In order to further ensure the contact state when not affected by the liquid, a counterweight 1013 is provided at the lower end of the float 101 to give the float 101 a downward gravity force. The spring 103 is used to make the float 101 quickly return to its original position after the liquid effect disappears. The magnet 1014 is used to cooperate with the magnetic sensor 30 provided on the upper end surface of the first partition 51 of the sleeve connector 5 (the magnetic sensor 30 is electrically connected to the PCB board 7 and is used to receive the magnetism of the magnet 1014 to achieve magnetic induction cooperation). The two are adjacent to each other. The magnet 1014 moves up and down with the float 101, thereby getting closer to and away from the magnetic sensor 30. That is, when the magnet 1014 is away from the magnetic sensor 20 and cannot be detected, the air pump 6 operates normally. When the magnet 1014 is close to the magnetic sensor 30 and is detected to be magnetically conductive, the air pump 6 stops pumping air.

[0034] The above method is used in two ways:

[0035] 1. Under normal pumping conditions, the float 101 is attached to the air nozzle 32 due to gravity. Air enters through the air nozzle 32, passes through the gap between the two adjacent outer ears 1011 along the float 101, and enters the air passage chamber 3131. At this time, the air hole 3112 is open. The gas entering the air passage chamber 3131 enters the first connecting chamber 511 through the air hole 3112, and then leaves through the air outlet of the sleeve connector 5 and enters the air pump 6; 2. When liquid is pumped, gas and liquid enter through the air nozzle 32 and accumulate on the float. The float 101 is lifted up below the second partition 311, and the plug on the float 101 is also lifted up and then pressed against the lower end surface of the second partition 311, sealing the air hole 3112. In this way, liquid cannot enter the air pump 6 through the air hole 3112. At the same time, the float 101 is lifted up by buoyancy, causing the magnet 1014 to approach the magnetic sensor 30. The magnetic sensor 30 detects the magnetism and sends a signal to the PCB board 7, and the air pump 6 stops pumping air. At the same time, the water inlet indicator light illuminates.

[0036] The liquid isolation component 10 is configured as a liquid sensing element. It does not engage with the connecting sleeve 3111 and is electrically connected to the PCB board 7 via the second partition 311. One end of the component extends into the air passage chamber 3131 to directly disconnect the operation of the air pump 6 by detecting liquid. The liquid isolation component 10 includes several liquid sensing needles 104, which are inserted into the second partition 311 and electrically connected to the PCB board 7. When the incoming gas carries liquid, the liquid sensing needles 104 detect the liquid, transmit an electrical signal to the control terminal, and then stop the air pump 6 from pumping air. This is another embodiment of the liquid isolation component 10.

[0037] The liquid isolation component 10 is configured as a direct blocking member, which does not engage with the connecting sleeve 3111 and is disposed within the air passage chamber 3131. It blocks the liquid carried by gas as it passes through the liquid isolation component 10, while allowing gas to pass through. The liquid isolation component 10 includes a diaphragm support 105 and a diaphragm 106. The diaphragm support 105 is fixed within the air passage chamber 3131, and the diaphragm 106 is disposed on the diaphragm support 105 and is also present in the gas passage path, thereby isolating the liquid carried by the gas. This is another embodiment of the liquid isolation component 10.

[0038] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A handheld vacuum preservation machine, comprising a housing (1) and an outer cover (2) covering the lower end of the housing (1) and concealing a suction nozzle sleeve (3), wherein a connecting liner (4) is provided inside the housing (1), and the lower end of the liner (4) is connected to a sleeve connector (5) for mounting the suction nozzle sleeve (3), an air pump (6) located above the sleeve connector (5) and providing suction force, a PCB main board (7) located above the air pump (6), and a battery compartment (8) located on the side of the PCB main board (7), characterized in that: The outlet and inlet of the sleeve connector (5) are connected to the inlet and outlet of the air pump (6). The PCB main board (7) is provided with a solenoid valve (9). The inlet of the solenoid valve (9) is connected to the mixing outlet of the air pump (6) and the gas branching outlet of the sleeve connector (5) through a three-way connector. The mixing outlet of the air pump (6) is connected to the outlet of the solenoid valve (9) and the three-way connector provided at the inlet of the solenoid valve (9) through a two-way connector. The suction nozzle sleeve (3) is provided with a liquid isolation component (10) that can prevent liquid from being sucked in together when pumping air.

2. The handheld vacuum food preservation machine according to claim 1, characterized in that: The connecting piece (5) has a first partition (51), a first upper baffle (52), and a first lower baffle (53). The first partition (51) has a first connecting cavity (511) formed synchronously by protruding upward at its central position. The suction sleeve (3) is connected to the first connecting cavity (511). The first upper baffle (52) abuts against the lower end of the inner liner (4). The inner circumferential surface of the first lower baffle (53) forms a gap between the suction sleeve (3) and the suction sleeve (3) after the suction sleeve (3) and the first connecting cavity (511) are connected. The first partition (51) has an air outlet (512) located within the gap. The first lower baffle (53) is also used to connect the outer cover (2).

3. The handheld vacuum food preservation machine according to claim 2, characterized in that: The air inlet and gas branch end of the sleeve connector (5) are both located on the upward protruding part of the first partition (51), and the air outlet is located on the first partition (51). An air outlet connector (20) is provided between the air outlet and the air outlet of the air pump (6).

4. The handheld vacuum preservation machine according to claim 3, characterized in that: The air-venting connector (20) has an L-shaped configuration and has a first guide channel (201), a turning channel (202), and a second guide channel (203) inside. The first guide channel (201) is for the air outlet end of the air pump (6) to be inserted into it, and the second guide channel (203) is for the air inlet end of the sleeve connector (5) to be inserted into it. The turning channel (202) is used to connect the first guide channel (201) and the second guide channel (203).

5. The handheld vacuum preservation machine according to claim 2, characterized in that: The liner (4) has a lower connecting plate (41) at its lower end, a connecting bracket (42) at its middle end, and an upper connecting plate (43) at its upper end. The lower connecting plate (41) abuts against the first upper enclosure (52) and is connected to the sleeve connector (5) by bolts. It forms a first through groove (411) through which the air outlet end and the gas branch end of the sleeve connector (5) pass, and a second through groove (412) through which the air inlet end of the sleeve connector (5) and the air outlet connector (20) are placed. The connecting bracket (42) has a pre- The pre-connection part (421) and the final connection part (422) define the assembly position of the air pump (6) in the liner (4) after the air pump (6) is inserted, and can be snapped in during insertion. The final connection part (422) is connected to the pre-connection part (421) by bolts after the air pump (6) is inserted into the pre-connection part (421). The upper connecting plate (43) is connected to the battery compartment (8) by bolts and forms a third through groove (431) for the compartment body part of the battery compartment (8) to pass through.

6. The handheld vacuum preservation machine according to claim 2, characterized in that: The suction sleeve (3) includes an outer sleeve (31) and an air nozzle (32). The outer sleeve (31) has a second partition (311), a second upper baffle (312), and a second lower baffle (313). The second upper baffle (312) enters into the first connecting cavity (511) to connect with the sleeve connector (5). A connecting sleeve (3111) and an air hole (3112) surrounding the connecting sleeve (3111) and allowing gas to pass through are provided at the center of the second partition (311). An air passage cavity (3131) is formed in the second lower baffle (313). The air nozzle (32) and the liquid isolation assembly (10) are disposed in the air passage cavity (3131).

7. The handheld vacuum preservation machine according to claim 6, characterized in that: The liquid isolation component (10) is configured as a magnetic induction component, which is intermittently connected to the connecting sleeve (3111) and will move to block the air hole (3112) due to the influence of the liquid. It also allows the operation of the air pump (6) to be disconnected by magnetic identification while blocking the air hole (3112).

8. The handheld vacuum preservation machine according to claim 6, characterized in that: The liquid isolation component (10) is configured as a liquid sensing component, which is not plugged into the connecting sleeve (3111) and is electrically connected to the second partition (311) and the PCB motherboard (7). One end of it extends into the air passage (3131) so as to directly disconnect the operation of the air pump (6) by recognizing the liquid.

9. The handheld vacuum preservation machine according to claim 6, characterized in that: The liquid isolation component (10) is configured as a direct blocking component, which does not engage with the connecting sleeve (3111) and is disposed within the air passage cavity (3131) to block the liquid when gas carries liquid through the liquid isolation component (10) while allowing gas to pass through.

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