A liquid exclusion device for a hand-held vacuum preserver

Abstract

A liquid isolation device for a handheld vacuum preserver, comprising a shell, and a cover combined with the lower end of the shell and used to hide the outer cover of the suction nozzle, the outer cover of the suction nozzle is provided with a liquid isolation device, when the liquid isolation device is a magnetic induction component, it comprises a float, a plug, and a spring that can be retracted under pressure, the float is movably arranged in the outer cover of the suction nozzle, and a connecting cavity is synchronously formed in the central position of the float, a plug post is arranged in the connecting cavity, the plug post is in transition with the plug and makes the plug be placed in the connecting cavity and in clearance fit with the outer cover of the suction nozzle, one end of the spring is supported on the corresponding abutting surface of the outer cover of the suction nozzle, and the other end is supported on the upper end surface of the plug. The utility model has the advantages that the liquid entering together with the gas can be prevented from entering the air pump, so that the damage rate of the air pump is reduced, and various structure modes are also provided for users to have various choices.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a liquid isolation device for 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 liquid isolation device for 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 liquid isolation device for a handheld vacuum preservation machine includes a housing and an outer cover that covers the lower end of the housing and hides the nozzle sleeve. The liquid isolation device is provided inside the outer cover of the nozzle sleeve. When the liquid isolation device is a magnetic induction component, it includes a float, a plug, and a spring that can be retracted under pressure. The float is movably disposed inside the outer cover of the nozzle sleeve, and has a connecting cavity formed synchronously by protruding downward at its central position. A pin is provided in the connecting cavity. The pin is transitionally fitted with the plug, so that the plug is placed in the connecting cavity and gap-fitted with the outer cover of the nozzle sleeve. One end of the spring is supported on the corresponding abutting surface of the outer cover of the nozzle sleeve, and the other end is supported on the upper surface of the plug.

[0006] To further improve the design, the float has several external lugs distributed along its circumferential direction on its outer circumferential surface, with gaps between adjacent external lugs for gas to pass through.

[0007] Further improvements include a cavity formed around the downwardly protruding part on the lower end face of the float, and an arc-shaped upper end face.

[0008] Further improvements include an insertion part and a sealing part. The insertion part is placed inside the connecting cavity and transitionally fits with the insertion post. The sealing part is formed on the insertion part and arranged in a ring. Its inner diameter gradually increases from bottom to top by folding outward, and the folding range can be increased when it abuts against the corresponding contact surface of the outer sleeve of the nozzle sleeve.

[0009] To further improve the design, a counterweight is installed on the lower end face of the downward protruding part of the float.

[0010] Further improvements include equipping the float with a magnet on its upper surface.

[0011] Further improvements include a liquid isolation component that is a liquid sensing component comprising several liquid sensing needles. These liquid sensing needles are located inside the outer sleeve of the nozzle sleeve and are electrically connected to the PCB board.

[0012] Further improvements include setting the liquid isolation component as a direct barrier component comprising a diaphragm support and a diaphragm, with the diaphragm support located inside the outer sleeve of the nozzle sleeve and the diaphragm located inside the diaphragm support.

[0013] The beneficial effects of this utility model are:

[0014] This invention utilizes a liquid isolation component to isolate the liquid, thus preventing the liquid from entering the air pump along with the gas. Liquid entering the air pump can cause damage, and isolating the liquid reduces the damage rate of the air pump. Furthermore, various structural options are available for users to choose from. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a full sectional view of the present invention, with the shell hidden.

[0017] Figure 3 This is a schematic diagram of the structure of the float of this utility model;

[0018] Figure 4 This is a full sectional structural diagram of the present invention, used to illustrate another structural form of the liquid isolation component;

[0019] Figure 5 This is a full sectional structural diagram of the present invention, used to illustrate another structural form of the liquid isolation component. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Referring to the attached drawings: This liquid isolation device for a handheld vacuum preservation machine includes a housing 1 and an outer cover 2 that covers the lower end of the housing 1 and conceals the nozzle sleeve 3. A liquid isolation device 4 is provided inside the outer cover of the nozzle sleeve 3. When the liquid isolation device 4 is a magnetic induction component, it includes a float 41, a plug 42, a spring 43 that can be retracted under pressure, and a magnet 44 disposed on the upper end face of the float 41. The float 41 is movably disposed inside the outer cover of the nozzle sleeve 3, and has a connecting cavity 411 formed synchronously by protruding downward at its central position. A pin 4111 is provided inside the connecting cavity 411. The pin 4111 transitionally fits with the plug 42, so that the plug 42 is placed inside the connecting cavity 411 and gap-fitted with the outer cover of the nozzle sleeve 3. One end of the spring 43 is supported on the corresponding abutment surface of the outer cover of the nozzle sleeve 3, and the other end is supported on the upper end face of the plug 42. The principle of this utility model is that the float 41 is used to drive the plug 42 and the magnet 44 to move up and down. The movement of the float 41 is affected by the liquid. That is, when no liquid enters, the float 41 remains in contact with the air nozzle 32 of the suction sleeve 3. The spring 43 is used to make the float 41 quickly return to its original position after the liquid effect disappears. The magnet 44 is used to cooperate with the magnetic sensor 5 set in the housing 1 (the magnetic sensor 5 is electrically connected to the PCB board set in the housing 1 and is used to receive the magnetism of the magnet 44 to achieve the magnetic sensor 5 cooperation). The two are adjacent to each other. The magnet 44 moves up and down with the float 41, thereby getting closer to and away from the magnetic sensor 5. That is, when the magnet 41 is away from the magnetic sensor 5, it cannot be detected by the magnetic sensor, so the air pump runs normally. When the magnet 41 is close to the magnetic sensor 5, it is detected by the magnetic sensor, and the air pump stops pumping air.

[0022] The above method is used in two ways:

[0023] 1. Under normal air extraction conditions, the float 41 is attached to the air nozzle due to gravity. Air enters through the air nozzle, passes through the air hole 311 on the outer sleeve 31 of the suction nozzle sleeve 3, and then enters the air pump. 2. When liquid is extracted, gas and liquid enter through the air nozzle and accumulate below the float 41, thus lifting the float 41. After being lifted, the plug 42 on the float 41 is also lifted and then adheres tightly to the corresponding contact surface of the outer sleeve 31 of the suction nozzle sleeve 3, sealing the air hole 311. In this way, liquid cannot enter the air pump through the air hole 311. At the same time, the float 41 moves upward due to buoyancy, causing the magnet 44 to approach the magnetic sensor 5. The magnetic sensor 5 detects the magnetism and sends a signal to the PCB board, the air pump stops extracting air, and the water inlet indicator light illuminates.

[0024] The float 41 has several ears 412 distributed along its circumferential direction on its outer peripheral surface. A gap is formed between adjacent ears 412 to allow gas to pass through. The ears 412 fit against the inner wall of the outer sleeve of the nozzle sleeve 3. This prevents the float 41 from shaking when it floats up and down. In order to avoid the ears 412 from obstructing the gas flow, the ears 412 are miniaturized. This creates a gap between two adjacent ears 412, which is used to allow gas to pass through and also ensures the stable movement of the float 41.

[0025] The lower end face of the float 41 also has a cavity 413 formed around the downward protruding part, and the upper end face is arc-shaped. The cavity 413 allows the gas to enter first, which can prevent the gas from flowing directly to the gap. It also allows the liquid to be left there and can quickly accumulate liquid so that the float 41 is pushed.

[0026] The plug 42 includes an insertion part 421 and a sealing part 422. The insertion part 421 is placed in the connecting cavity 411 and transitionally fits with the insertion post 4111. The sealing part 422 is formed on the insertion part 421 and is arranged in a ring. Its inner diameter gradually increases from bottom to top by folding outward, and the folding range can be increased when it abuts against the corresponding contact surface of the outer sleeve of the nozzle sleeve 3. The insertion part 421 is used to connect with the insertion post 4111 to keep the plug 42 in the connecting cavity 411. The sealing part 422 is used to seal the air holes formed on the outer sleeve of the nozzle sleeve 3, so as to prevent gas from passing through. The sealing part 422 is folded outward. The purpose of folding outward is to produce a sealing effect after contact, so as to better prevent the gas from entering.

[0027] A counterweight 414 is provided on the lower end face of the downward protruding part of the float 41. In order to further ensure the fit in a state unaffected by liquid, a counterweight 414 is provided at the lower end of the float 41 to give the float 41 a downward gravity force.

[0028] The liquid isolation component 4 is a liquid sensing component that includes several liquid sensing needles 45. The liquid sensing needles 45 are disposed inside the outer sleeve of the nozzle sleeve 3 and are electrically connected to the PCB board. When the incoming gas carries liquid, the liquid sensing needles 45 detect the liquid, transmit an electrical signal to the control terminal, and then stop the air pump from pumping. This is another embodiment of the liquid isolation component 4.

[0029] The liquid barrier component 4 is configured as a direct barrier member, comprising a diaphragm support 46 and a diaphragm 461. The diaphragm support 46 is disposed inside the outer sleeve of the nozzle sleeve 3, and the diaphragm 461 is disposed inside the diaphragm support 46. The diaphragm support 46, after being disposed inside the outer sleeve of the nozzle sleeve 3, exists in the path of gas passage, thereby isolating the liquid carried in the gas. This is another embodiment of the liquid barrier component 4.

[0030] 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 liquid isolation device for 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), characterized in that: The outer sleeve of the suction nozzle sleeve (3) is provided with a liquid isolation component (4). When the liquid isolation component (4) is a magnetic induction component, it includes a float (41), a plug (42), a spring (43) that can be retracted under pressure, and a magnet (44) disposed on the upper end face of the float (41). The float (41) is movably disposed inside the outer sleeve of the suction nozzle sleeve (3), and has a connecting cavity (411) formed synchronously by protruding downward at its central position. A plug (4111) is disposed inside the connecting cavity (411). The plug (4111) is transitionally fitted with the plug (42) so that the plug (42) is placed inside the connecting cavity (411) and gap-fitted with the outer sleeve of the suction nozzle sleeve (3). One end of the spring (43) is supported on the corresponding contact surface of the outer sleeve of the suction nozzle sleeve (3), and the other end is supported on the upper end face of the plug (42).

2. The liquid isolation device for a handheld vacuum preservation machine according to claim 1, characterized in that: The float (41) has a plurality of external ears (412) distributed along its circumferential direction on its outer peripheral surface, and a gap for gas to pass through is formed between adjacent external ears (412).

3. The liquid isolation device for a handheld vacuum preservation machine according to claim 2, characterized in that: The lower end face of the float (41) also forms a cavity (413) around the downward protruding part, and the upper end face is arc-shaped.

4. The liquid isolation device for a handheld vacuum preservation machine according to claim 3, characterized in that: The plug (42) includes an insertion part (421) and a sealing part (422). The insertion part (421) is placed in the connecting cavity (411) and transitionally fits with the insertion post (4111). The sealing part (422) is formed on the insertion part (421) and arranged in a ring. Its inner diameter gradually increases from bottom to top by turning outward, and the outward turning range can be increased when it abuts against the corresponding contact surface of the outer sleeve of the suction nozzle sleeve (3).

5. The liquid isolation device for a handheld vacuum preservation machine according to claim 4, characterized in that: The float (41) has a counterweight (414) on the lower end face of its downward protruding portion.

6. The liquid isolation device for a handheld vacuum preservation machine according to claim 1, characterized in that: The liquid isolation component (4) is a liquid sensing component that includes several liquid sensing needles (45). The liquid sensing needles (45) are disposed inside the outer sleeve of the nozzle sleeve (3) and are electrically connected to the PCB board.

7. The liquid isolation device for a handheld vacuum preservation machine according to claim 1, characterized in that: The liquid barrier component (4) is configured as a direct barrier component, which includes a diaphragm support (46) and a diaphragm (461). The diaphragm support (46) is disposed inside the outer sleeve of the nozzle sleeve (3), and the diaphragm (461) is disposed inside the diaphragm support (46).

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