CN218259868U - Vacuum storage device - Google Patents

Abstract

The utility model provides a vacuum storage device, which comprises a vacuum tank, a base and a vacuum pump for vacuumizing the vacuum tank, wherein the vacuum tank is provided with a vacuum switch which can be connected in series with the vacuum pump in the same circuit loop, a magnetic valve is arranged in the base, and when the vacuum tank is far away from the magnetic valve, the magnetic valve is closed; when the vacuum canister is adjacent to the magnetic valve, the magnetic valve opens. The vacuum pump is controlled to start and stop by arranging the vacuum switch, the structure is simple, the vacuum degree in the vacuum tank is controlled within a certain range instead of a value, and the frequent starting and stopping of the vacuum pump can be avoided; through setting up the magnetic valve, when taking away/installing the vacuum tank, the magnetic valve can self-closing/open, need not artifical manual operation, can avoid operating personnel because of forgetting the condition of opening or closing the valve.

Description

Vacuum storage device

Technical Field

The utility model belongs to vacuum storing field, concretely relates to vacuum storage device.

Background

Vacuum storage can prolong the storage time of the articles and is widely adopted. At present, the common vacuum preservation box in the market is a household vacuum preservation box, the volume of the vacuum preservation box is small, and the vacuum preservation box is vacuumized by a portable vacuum pump. For some vacuum tanks with large volume (such as storing grains, medical equipment and the like), a special vacuum pump is generally used for vacuumizing the vacuum tank. The air inlet of the vacuum pump is connected with the suction port on the vacuum tank through a suction pipe, and the suction pipe is provided with an on-off valve for controlling the on-off of the suction pipe, wherein the on-off valve is generally an electronic valve or a manual valve.

The vacuum tank equipped with the vacuum pump is generally evacuated periodically, or a sensor for detecting the vacuum degree in the vacuum tank is arranged as a switch for controlling the on-off of the vacuum pump. However, the existing vacuum degree sensor has a complex structure, and the vacuum tank using the vacuum degree sensor has high cost and needs to be improved.

In addition, when the vacuum tank is required to be disconnected from the vacuum pump, and the on-off valve adopts an electronic valve, the electronic valve has more pipeline connections, larger volume and high control cost; when the on-off valve is a manual valve, although the manual valve has a simple structure and low cost, the on-off valve on the suction tube needs to be manually closed (similar to the situation that a water faucet connected with the washing machine needs to be manually closed when the washing machine is moved away), and the on-off valve is manually controlled and easily mistaken, for example, people may forget to close the on-off valve.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving the technical problem who exists among the prior art, the utility model aims at providing a vacuum storage device.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a vacuum storage device comprises a vacuum tank, a base and a vacuum pump for vacuumizing the vacuum tank, wherein the bottom of the vacuum tank is provided with a fourth interface which can be communicated with the inside of the vacuum tank, and the base is provided with a first interface which can be connected with an air inlet of the vacuum pump and a second interface which can be butted and communicated with the fourth interface of the vacuum tank; the vacuum storage device at least comprises one of the following structures;

the structure I is as follows: the vacuum tank is provided with a switch structure which can be connected in series with the vacuum pump in the same circuit loop, the switch structure comprises a vacuum switch, the vacuum tank is provided with a second detection port communicated with the inside of the vacuum tank, the vacuum switch comprises a second detection cap made of elastic materials and arranged at the second detection port, the inside of the second detection cap is communicated with the inside of the vacuum tank through the second detection port, a second magnet is fixedly connected onto the second detection cap, the vacuum tank is also connected with two conductors positioned on the outer side of the second detection cap, the two conductors and the enabling end of the vacuum pump are connected in series in the same circuit loop, the two conductors are respectively a first conductor and a second conductor, the first conductor is fixedly arranged, and the second conductor can be close to or far away from the first conductor due to the magnetic force of the second magnet; the second detection cap can stretch and retract along with the change of the vacuum degree in the vacuum tank, so that the second magnet is close to or far away from the second conductor; when the second magnet is close to the second conductor, the second conductor can be electrically contacted with the first conductor under the action of the magnetic force of the second magnet so as to close the vacuum switch; when the second magnet is far away from the second conductor, the second conductor is far away from the first conductor so as to open the vacuum switch;

the structure II is as follows: the magnetic valve is arranged in the base and comprises a valve seat and a valve body which is positioned in the valve seat and fixedly connected with the valve seat, the valve seat is provided with a first air port and a second air port which are communicated with the interior of the valve seat, the first air port and the second air port are respectively connected with a first connector and a second connector of the base through pipelines, the valve body is provided with a vent hole which is simultaneously communicated with the first air port and the second air port, and the interior of the valve seat is also movably connected with a valve core which can seal the vent hole; the magnetic valve also comprises a first magnet and a ferromagnetic substance which can be attracted by the first magnet, one of the first magnet and the ferromagnetic substance is fixedly connected with the bottom of the vacuum tank, and the other one is fixedly connected with the valve core; when the fourth interface of the vacuum tank is disconnected with the second interface of the base and is far away from the magnetic valve, the valve core seals the vent hole under the action of gravity, and the first air port is not communicated with the second air port; when the vacuum tank is arranged on the base to enable the fourth interface to be in butt joint with the second interface, the valve core is far away from the vent hole and opens the vent hole under the action of magnetic attraction force generated by the first magnet on the ferromagnetic substance, and the first air port is communicated with the second air port.

In the technical scheme, in the first structure, a vacuum switch connected with a vacuum pump in series in the same loop is arranged, when the vacuum degree in the vacuum tank is reduced to K1, the vacuum switch is closed, and the vacuum pump starts to vacuumize the interior of the vacuum tank; when the vacuum degree in the vacuum tank rises to K2, the vacuum switch is switched off, and the vacuum pump stops vacuumizing the vacuum tank. The vacuum switch is arranged to control the vacuum pump to start or stop, so that the vacuum degree in the vacuum tank is controlled between K1 and K2, and the requirement of storing articles is met; and because the vacuum degree in the vacuum tank is kept in a certain range, rather than a value, the frequent start and stop of the vacuum pump can be avoided, and the service life of the vacuum pump is prolonged. In the second structure, take away the vacuum tank back from the base, ferromagnetic substance loses the magnetic attraction of magnet, and the case seals the air vent under the effect of gravity to make the magnetic valve be in the off-state, need not artifical manual closing. After the vacuum tank is installed, the magnet generates suction force on the ferromagnetic substance, so that the valve core is far away from the valve body to open the vent hole, and the magnetic valve is in an open state and does not need manual opening. The utility model discloses when taking away/installing the vacuum tank, the magnetic valve can self-closing/open, need not artifical manually operation, can avoid operating personnel because of forgetting the condition of opening or closing the valve.

The utility model discloses an among the preferred embodiment, in structure two, the disk seat still has rather than inside communicating third gas port, and the third gas port communicates with each other with first gas port all the time, is equipped with the third interface that is located first interface offside on the disk seat, and the third gas port passes through the pipeline and links to each other with the third interface, and the third interface is equipped with stopper or stop valve that is used for sealing it.

Among the above-mentioned technical scheme, the magnetic valve is the three-way valve, through setting up a plurality of magnetic valves for a vacuum storage device can transversely cascade a plurality of vacuum tanks, takes away wherein arbitrary one or a plurality of vacuum tanks back wherein, does not influence the evacuation work of other vacuum tanks moreover.

The utility model discloses an among the preferred embodiment, in structure two, the top of vacuum tank has the fifth interface that corresponds with fourth interface position, the magnetic valve that has first gas port, second gas port and third gas port is installed at the top of vacuum tank, the first gas port and the third gas port of magnetic valve communicate with each other all the time, be equipped with the on-off valve of control break-make between first gas port and the second gas port, first gas port passes through the pipeline and links to each other with the fourth interface of vacuum tank, the second gas port passes through the pipeline and links to each other with the fifth interface of vacuum tank, the third gas port passes through the pipeline and links to each other with the vacuum tank is inside.

Among the above-mentioned technical scheme, through setting up the magnetic valve for a vacuum storage device can vertically cascade a plurality of vacuum tanks, takes away every vacuum tank of the top back away moreover, does not influence the evacuation work of other vacuum tanks of this row.

In a preferred embodiment of the present invention, a first check valve is disposed on a pipeline connecting the third gas port of the magnetic valve and the interior of the vacuum tank, the first check valve only allowing the gas in the vacuum tank to flow toward the magnetic valve; and/or a second one-way valve which only allows gas to flow from the first air port to the fourth interface is arranged on a pipeline connecting the first air port of the magnetic valve and the fourth interface of the vacuum tank.

Among the above-mentioned technical scheme, can prevent each other the cluster of gas in each vacuum tank through setting up first check valve, can prevent to cluster the flavor, when a plurality of vacuum tanks cascade moreover, can not let out the vacuum in other vacuum tanks because the magnetic valve is opened, the vacuum in every vacuum tank is independent promptly, when cascading a plurality of vacuum tanks, can not let out the vacuum because of one of them vacuum tank and lead to all jars to let out the vacuum. Through setting up the second check valve, during an exclusive use vacuum tank, people can make the vacuum pump and the fifth interface connection of this vacuum tank, and under the non return effect of second check valve, the vacuum pump can be to the vacuum tank evacuation rather than being connected, realizes the removal of single jar and takes out air sealing function.

In a preferred embodiment of the utility model, the vacuum tank comprises a tank body and an upper cover for sealing the tank opening of the tank body, and a cover body unlocking and locking structure for locking and unlocking the upper cover is arranged between the tank body and the upper cover; the cover body unlocking and locking structure comprises a bolt with a lock tongue and a lock groove, wherein the bolt is arranged on the upper cover, the lock groove is arranged on the tank body and can be matched with the lock tongue in an inserted mode, the upper cover is provided with a pressure relief opening communicated with the inside of the tank body, and a sealing plug capable of sealing the pressure relief opening is arranged at the pressure relief opening; the top of upper cover is equipped with the shift knob who has open and closed state, and shift knob passes through first drive mechanism and is connected with the bolt, and shift knob passes through second drive mechanism and sealing plug connection, opens shift knob through pushing down/lifting shift knob, and the spring bolt can break away from the locked groove and the unblock, and the sealing plug can move and open the pressure release mouth simultaneously.

Among the above-mentioned technical scheme, through setting up lid unblock and locking structure, when operating switch button made the state in the open mode, bolt and sealing plug linkage, the upper cover unlocks with the jar body when the pressure release mouth is opened, a key release and unblock, easy operation.

The utility model discloses an among another kind of preferred embodiment, the upper cover is connected through the pivot rotation with the jar body, and the cover is equipped with the torsional spring in the pivot, two torque arms of torsional spring respectively with upper cover and jar body coupling, after the unblock of upper cover and jar body release, the upper cover can be opened under the elasticity of torsional spring.

In the technical scheme, in the process of reducing the negative pressure in the tank body by opening the pressure relief port, when the adsorption force applied to the upper cover by the negative pressure in the tank body is smaller than the elasticity of the torsion spring, the upper cover is automatically opened under the action of the torsion spring, and one-key unlocking, pressure relief and automatic opening of the upper cover are realized.

In another preferred embodiment of the present invention, the first transmission mechanism includes a first inclined plane disposed on the switch button and a second inclined plane disposed on the plug pin, which is matched with the first inclined plane and can be abutted against the first inclined plane, the plug pin is elastically connected to the upper cover through a first return spring, when the switch button is opened, the first inclined plane and the second inclined plane are abutted against each other and relatively move, so that the lock tongue moves in a direction away from the lock groove to be separated from the lock groove; and/or the second transmission mechanism comprises a connecting rod which is rotatably connected with the upper cover through a pin shaft, the first end of the connecting rod is fixedly connected with the sealing plug, the second end of the connecting rod is a free end, when the switch button is in a closed state, the switch button is not in contact with the second end of the connecting rod, when the switch button is in an open state, the switch button can be abutted against the second end of the connecting rod and the connecting rod is enabled to rotate around the pin shaft, and therefore the sealing plug moves towards the direction far away from the pressure relief opening.

In the technical scheme, the vertical motion of the switch button is converted into the transverse motion of the bolt by arranging the first inclined plane and the second inclined plane, so that the bolt can be inserted into the lock groove or can leave the lock groove by operating the switch button; the first reset spring is used for enabling the spring bolt to reset and to be inserted into the lock groove on the one hand, and on the other hand, exerts elasticity to the spring bolt inserted into the lock groove, and the spring bolt can not leave the lock groove under no external force, and locking effect is good. Through setting up the connecting rod that can rotate relative to the round pin axle, make the motion direction of sealing plug opposite with shift knob, push down/lift shift knob alright open the pressure release mouth, simple structure, convenient operation.

In another preferred embodiment of the present invention, the cover unlocking and locking structure further comprises a self-locking mechanism for locking the open-state switch button, the self-locking mechanism comprises a locking platform provided on the switch button and a lock catch provided on the plug pin and capable of being engaged with the locking platform, and after the switch button is opened, the locking platform is engaged with the lock catch to lock the switch button; the bolt is elastically connected with the upper cover through a first reset spring, and the switch button is elastically connected with the upper cover through a third reset spring; lid unblock and locking structure still include the release mechanism who carries out the unblock to self-locking mechanism, the in-process that the upper cover was opened, under release mechanism's effect, self-locking mechanism moves and makes shift knob unblock, the one end that the locked groove was kept away from to the upper cover is connected through pivot and jar rotation, release mechanism is including seting up the open slot on the bolt, and the relative jar fixed unblock piece that inserts in the open slot, the open slot is located between locked groove and the pivot, the terminal surface that the unblock piece is close to the pivot has the face of unblock, the distance between face of unblock and the pivot rotation center reduces from supreme gradually down, the open slot has the unblock wall that can be gliding on the unblock face, open the in-process of upper cover, the unblock wall upwards slides on the face of unblock and makes the spring bolt to the direction motion of keeping away from the locked groove, thereby make self-locking mechanism unblock.

In the technical scheme, the switch button in the open state is locked by the self-locking mechanism, so that in the pressure relief process, people do not need to press down/lift up the switch button for a long time to keep the switch button in the open state, and the use is more convenient; the self-locking switch button is unlocked by arranging the unlocking mechanism, so that manual unlocking by people is not needed, and the operation steps are further simplified. The first reset spring is used for resetting the lock tongue to be inserted into the lock groove on one hand, and exerts elastic force on the lock tongue inserted into the lock groove on the other hand, so that the lock tongue cannot leave the lock groove under the action of no external force, and the locking effect is good; after the third reset spring is arranged, people do not need to manually reset the switch button in the opening state to the closing state, and the switch button is reset by the third reset spring, so that the switch button is more convenient and fast to use.

In another preferred embodiment of the present invention, the vacuum tank includes a tank body and an upper cover for closing a tank opening of the tank body, the vacuum switch is installed in the upper cover of the vacuum tank, the switch structure further includes a lid switch for detecting whether the upper cover is in an open or closed state, and the lid switch and the vacuum switch are connected in series in the same circuit loop; the cover switch comprises a third conductor arranged on the vacuum tank body and a fourth conductor arranged on the vacuum tank upper cover, when the vacuum tank upper cover is closed, the third conductor is in contact with the fourth conductor to close the cover switch, and when the vacuum tank upper cover is opened, the third conductor is separated from the fourth conductor to open the cover switch.

Among the above-mentioned technical scheme, the series connection lid switch in circuit return circuit, only when the upper cover is in the closure state, vacuum switch is closed, and the vacuum pump just can be electrified and work, the condition of vacuum pump work when can avoiding the lid to open.

The utility model discloses an among another kind of preferred embodiment, covering on and being equipped with the vacuum scale that is used for measuring jar internal portion vacuum, the vacuum scale include with jar internal portion communicating first detection cap of making by elastic material and with first detection cap rigid coupling and protractile scale to the upper cover outside, first detection cap can be flexible along with jar internal portion's vacuum change to make the scale stretch out or retract the upper cover.

In the technical scheme, the air pressure in the tank body is measured by arranging the vacuum degree scale, so that on one hand, people can check the vacuum degree in the tank body through the scale, and the condition that the tank body is vacuumized or leaked is avoided; on the other hand, people can conveniently judge the pressure relief completion condition by observing the scale.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an embodiment of a vacuum storage device provided with a vacuum tank.

Fig. 2 is a schematic top view of fig. 1.

Fig. 3 is a schematic diagram of an air path connection of a vacuum storage device according to an embodiment of the present disclosure.

Fig. 4 is a schematic structural view of the vacuum tank away from the magnetic valve, and the magnetic valve is in a closed state.

Fig. 5 is a schematic structural view of the vacuum tank in the vicinity of the magnetic valve, the magnetic valve being in an open state.

Fig. 6 isbase:Sub>A partial cross-sectional view ofbase:Sub>A-base:Sub>A in fig. 2.

Fig. 7 is a partial cross-sectional view of B-B in fig. 2.

Fig. 8 is a schematic view of the vacuum tank of fig. 1 with the upper housing of the upper cover hidden therein.

Fig. 9 is a partially enlarged view of fig. 8 at C.

Fig. 10 is a schematic cross-sectional view from another perspective of a vacuum switch.

FIG. 11 is a schematic diagram of the electrical circuit for connecting the switch structure of a vacuum tank to a vacuum pump.

FIG. 12 is a schematic diagram of the electrical circuit for connecting the switch structure of the two vacuum tanks to the vacuum pump.

FIG. 13 is a schematic view of a vacuum storage device with multiple vacuum tanks cascaded in a transverse direction.

Fig. 14 is a schematic view of a vacuum tank of fig. 13 removed.

FIG. 15 is a schematic view of a vacuum storage device with multiple vacuum tanks cascaded in a longitudinal direction.

Fig. 16 is a schematic view of a vacuum storage apparatus in which a plurality of vacuum tanks are cascaded in a transverse and longitudinal direction.

Reference numerals in the drawings of the specification include: the vacuum pump 100, the first air pipe 101, the second air pipe 102, the third air pipe 103, the plug 104, the magnetic valve 200, the valve seat 210, the first air port 211, the second air port 212, the third air port 213, the valve body 220, the vent hole 221, the valve core 230, the first magnet 240, the sealing cover 250, the vacuum switch 300, the second detection cap 310, the second magnet 320, the first conductor 330, the second conductor 340, the latch 410, the latch tongue 411, the second inclined plane 412, the latch 413, the open slot 414, the unlocking wall 4141, the first return spring 415, the guide post 416, the switch button 420, the abutting part 421, the first inclined plane 422, the locking platform 423, the third return spring 424, 430, the connecting rod 431, the sealing plug 104 the vacuum detection device comprises a pin shaft 432, a second return spring 433, a vacuum degree scale 440, a first detection cap 441, a scale 442, a vacuum tank 500, a ferromagnetic substance 501, a plug 502, a fourth interface 503, a fifth interface 504, a suction port 505, a first check valve 506, a second check valve 507, an upper cover 510, an upper shell 511, a lower shell 512, a ventilation cover 513, a pressure relief port 514, a first detection port 515, a fixing groove 516, a connecting column 517, a second detection port 518, a tank 520, a locking groove 521, an unlocking block 522, an unlocking surface 5221, a handle 530, a sealing ring 540, a rotating shaft 550, a base 600, a first interface 601, a second interface 602, a third interface 603 and a cover switch 700.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "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 simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

Example one

The utility model provides a vacuum storage device, as shown in fig. 1 and 3 in the utility model discloses an in a preferred embodiment, this kind of vacuum storage device includes vacuum tank 500, base 600 and to the vacuum pump 100 of vacuum tank 500 evacuation, vacuum tank 500 includes jar body 520 and with jar mouth confined upper cover 510 of jar body 520, jar body 520 is installed on base 600. The bottom of the vacuum tank 520 has a fourth port 503 capable of communicating with the inside of the vacuum tank 500, the left side of the base 600 has a first port 601 capable of connecting with the inlet of the vacuum pump 100, and the top of the base 600 has a second port 602 capable of interfacing and communicating with the fourth port 503 of the vacuum tank 500.

The magnetic valve 200 is installed in the base 600, and as shown in fig. 4 and 5, the magnetic valve 200 includes a valve seat 210 and a valve body 220 located in the valve seat 210 and fixedly connected to the valve seat 210, the valve body 220 and the valve seat 210 are both plastic parts, and the valve body 220 and the valve seat 210 are integrally injection-molded or separately arranged and then fixedly connected to form a whole. The valve seat 210 has a first gas port 211 and a second gas port 212 communicating with the interior thereof. The valve body 220 has a vent hole 221 communicating with both the first gas port 211 and the second gas port 212, and a valve body 230 capable of closing the vent hole 221 is movably connected to the inside of the valve seat 210. The valve seat 210 is vertically arranged, the valve core 230 moves from top to bottom to close the vent hole 221, the first air port 211 is positioned on one side of the valve seat 210, and the second air port 212 is positioned on the other side of the valve seat 210.

The magnetic valve 200 further includes a ferromagnetic substance 501 and a first magnet 240 capable of being attracted by the ferromagnetic substance 501, one of the ferromagnetic substance 501 and the first magnet 240 is fixed to the bottom of the vacuum tank 500, and the other is fixed to the valve core 230, for example, the first magnet 240 is fixed to the valve core 230 and located inside the valve core 230, and the ferromagnetic substance 501 is located at the bottom of the vacuum tank 500. The first magnet 240 is a magnet or a magnetite, and the exterior of the first magnet 240 is sprayed with antirust paint; the ferromagnetic substance 501 is an iron block, or the ferromagnetic substance 501 is a magnet or a magnet having a magnetic pole opposite to that of the first magnet 240.

In this embodiment, the vacuum tank 500 is positioned above the magnetic valve 200, the bottom of the vacuum tank 500 is detachably mounted on the base 600, the magnetic valve 200 is embedded in the base 600, the valve seat 210 is fixedly connected to the base 600, and the base 600 closes the upper end of the valve seat 210. The first air port 211 can be connected to an air inlet of the vacuum pump 100 through a first air pipe 101, and the second air port 212 can be connected to a suction port 505 of the vacuum tank 500 through a second air pipe 102.

As shown in fig. 4, when the vacuum tank 500 is removed from the base 600, the fourth port 503 of the tank 510 is disconnected from the second port 602 of the base 600 and is away from the magnetic valve 200, the valve core 230 closes the vent hole 221 under the action of gravity, the first vent hole 211 and the second vent hole 212 are not communicated, and the magnetic valve 200 is closed. As shown in fig. 3 and 5, when the vacuum tank 500 is mounted on the base 600 and the fourth port 503 is mated with the second port 602, the first magnet 240 inside the magnetic valve 200 generates a magnetic attraction force on the ferromagnetic substance 501 at the bottom of the vacuum tank 500, and the magnetic attraction force moves the valve core 230 upward and away from the vent hole 221, thereby opening the vent hole 221, communicating the first air port 211 with the second air port 212, and opening the magnetic valve 200.

The utility model discloses set up magnetic valve 200 in base 600, take away vacuum tank 500 back from base 600, first magnet 240 loses the magnetic attraction to ferromagnetic substance 501, and case 230 downstream and seal air vent 221 under the effect of gravity to make magnetic valve 200 be in the off-state, need not artifical manual closing. After the vacuum tank 500 is mounted on the base 600, the first magnet 240 generates attraction force to the ferromagnetic substance 501, so that the valve core 230 moves upward to open the vent hole 221, thereby placing the magnetic valve 200 in an open state, and manual opening is not required.

In another preferred embodiment, as shown in fig. 4 and 5, a first magnet 240 is provided in the valve seat 210 and is vertically slidably coupled to the valve seat 210. As shown in fig. 4, when the magnetic valve 200 is in the closed state, the first magnet 240 does not close the second gas port 212, and the second gas port 212 communicates with the inside of the valve seat 210.

In another preferred embodiment, as shown in fig. 4, the bottom of the vacuum tank 500 is provided with a blind hole, the ferromagnetic substance 501 is located in the blind hole, a plug 502 for covering the ferromagnetic substance 501 is further fixed in the blind hole, the plug 502 is made of a material without magnetic isolation, and the plug 502 does not affect the ferromagnetic substance 501 to suck the first magnet 240 upwards to open the magnetic valve, for example, the plug 502 is made of rubber.

In another preferred embodiment, as shown in fig. 3-5, the valve seat 210 further has a third air port 213 communicating with the interior thereof, the third air port 213 is connected to the third air tube 103, the third air port 213 is always communicated with the first air port 211, and the third air port 213 is not communicated with the second air port 212 when the magnetic valve 200 is in the closed state. Preferably, the third gas port 213 is collinear with the first gas port 211, the third gas port 213 being on the same side as the second gas port 212, the second gas port 212 being above the third gas port 213. The magnetic valve 200 is a three-way valve by providing a third gas port 213 for the split flow. The valve seat 600 is provided with a third port 603 on the opposite side of the first port 601, the third port 213 is connected with the third port 603 through a third air pipe 103, and the third port 603 is provided with a plug 104 or a stop valve for sealing the third port 603.

In another preferred embodiment, as shown in fig. 3, the vacuum tank 500 has a fifth port 504 at the top of the lid 510 corresponding to the position of the fourth port 503, and a magnetic valve having a first gas port, a second gas port and a third gas port is installed in the lid 510 of the vacuum tank 500, and the magnetic valve is also a magnetic valve 200. The first air port of the magnetic valve 200 in the upper cover 510 is also always communicated with the third air port, the first air port is connected with the first air pipe 101, the first air pipe 101 extends downwards through the handle 530 and is connected with the fourth interface 503 at the bottom of the tank 520, the second air port is connected with the fifth interface 504 of the upper cover 510 through the second air pipe 102, the third air port is connected with the suction port 505 on the upper cover 510 of the vacuum tank 500 through the third air pipe 103, and the suction port 505 is communicated with the interior of the vacuum tank 500.

In another preferred embodiment, as shown in fig. 3, a first check valve 506 for allowing only the air in the vacuum tank 500 to flow toward the magnetic valve 200 is provided in the third air pipe in the upper lid 510 of the vacuum tank 500, and the first check valve 506 is provided near the suction port 505. Further preferably, a second one-way valve 517 only allowing gas to flow down from the first air pipe 100 to the fourth port 503 is disposed on a pipeline connecting the first air pipe 100 in the upper cover 510 of the vacuum tank 500 and the fourth port 503 at the bottom of the tank 520.

Example two

The principle of the present embodiment is substantially the same as that of the first embodiment, except that the vacuum tank 500 is further provided with a switch structure capable of being connected in series with the vacuum pump 100 in the same circuit. As shown in fig. 7, 10 and 11, in the present embodiment, the switch structure includes a vacuum switch 300 installed in a receiving space formed by an upper housing 511 and a lower housing 512 of an upper cover 510, a second detection port 518 is opened on a vacuum tank 500 and communicated with the inside of the vacuum tank, and the second detection port 518 is provided on the upper cover 510 of the vacuum tank 500. The vacuum switch 300 includes a second sensing cap 310 made of an elastic material installed at the second sensing port 518, the second sensing cap 310 includes, but is not limited to, a bellows type dish-shaped suction cup or an air bladder, and the second sensing cap 310 has the same structure as the first sensing cap 441. The second sensing cap 310 is vertically disposed, and the inside of the second sensing cap 310 is communicated with the inside of the vacuum tank 500 through the second sensing port 518. The second detecting cap 310 is fixedly connected with a second magnet 320, the second magnet 320 is embedded in the top of the second detecting cap 310, and the second magnet 320 is a magnet or a magnetite. The vacuum tank 500 is further connected with two conductors above the second detection cap 310, the two conductors are connected in series with the enable terminal of the vacuum pump 100 in the same circuit loop, the two conductors are a first conductor 330 and a second conductor 340, the first conductor 330 is fixedly arranged relative to the lower housing 511, and the second conductor 340 can be close to or far away from the first conductor 330 by the magnetic force of the second magnet 320.

The volume of the second sensing cap 310 may be vertically expanded and contracted, and the second sensing cap 310 can be expanded and contracted according to the change of the degree of vacuum inside the vacuum tank 500, thereby moving the second magnet 320 closer to or away from the second conductor 340. When the second magnet 320 is close to the second conductor 340, the second conductor 340 can be electrically contacted with the first conductor 330 under the magnetic force of the second magnet 320, so that the vacuum switch 300 is closed; when the second magnet 320 moves away from the second conductor 340, the second conductor 340 moves away from the first conductor 330 to open the vacuum switch 300.

Specifically, the upper lid 510 of the vacuum tank 500 is closed, the vacuum degree inside the vacuum tank 500 is decreased, so that the air pressure inside the vacuum tank 500 is increased, the air pressure is increased, so that the volume of the second detection cap 310 is expanded, so that the second magnet 320 moves upward, until the magnetic force generated by the second magnet 320 makes the second conductor 340 electrically contact with the first conductor 330 (assuming that the vacuum degree inside the vacuum tank 500 is K1 at this time), the vacuum switch 300 is closed, so that the vacuum pump 100 is powered on to operate, and the vacuum pump 100 evacuates the inside of the vacuum tank 500. In the process of vacuum pumping, the vacuum degree inside the vacuum tank 500 rises, the air pressure inside the vacuum tank 500 decreases, the air pressure decreases to retract the second detection cap 310, until the second detection cap 310 retracts enough to overcome the magnetic force generated by the second magnet 320 (assuming that the vacuum degree inside the vacuum tank 500 is K2 at this time), the second magnet 320 moves downward, the second conductor 340 leaves the first conductor 330 to turn off the vacuum switch 300, the vacuum switch 300 is turned off to turn off the vacuum pump 100 to stop working, and the vacuum pump 100 stops pumping the vacuum to the vacuum tank 500.

By adopting the technical scheme, when the vacuum degree in the vacuum tank 500 is reduced to K1, the vacuum switch 300 is closed, and the vacuum pump 100 starts to vacuumize the vacuum tank 500; when the vacuum degree in the vacuum tank 500 rises to K2, the vacuum switch 300 is turned off, and the vacuum pump 100 stops the vacuum pumping of the vacuum tank 500. The utility model discloses a set up vacuum switch 300 control vacuum pump 100 and start or stop, with the inside vacuum control of vacuum tank 500 between K1 to K2 (the elasticity that specific accessible changes second detection cap 310 and the magnetic force of second magnet 320 change K1, K2), satisfy the demand of storage article.

In a preferred embodiment, as shown in fig. 10, the first conductor 330 is located between the second magnet 320 and the second conductor 340, the second magnet 320 is in contact with the first conductor 330, and the magnetic attraction force generated by the second magnet 320 can move or elastically deform the second conductor 340 downward to be in contact with the first conductor 330; or the first conductor 330 is made of a magnetic material capable of conducting electricity, when the second magnet 320 is in contact with the first conductor 330, the first conductor 330 can be magnetized by the second magnet 320, and the magnetic attraction force generated by the magnetized first conductor 330 can enable the second conductor 340 to be in electrical contact with the first conductor 330. It should be noted that the second conductor 340 may also be disposed between the second magnet 320 and the first conductor 330, the second magnet 320 moves upward, and the repulsive force generated by the second magnet 320 can make the second conductor 340 move upward or elastically deform to electrically contact with the first conductor 330.

In this embodiment, the second conductor 340 is a conductive elastic sheet that can elastically deform under the magnetic force of the second magnet 320, for example, the elastic sheet is located above the first conductor 330 with a gap therebetween, the right end of the elastic sheet is fixed relative to the first conductor 330, and the left end of the elastic sheet is a free end. When the second magnet 320 moves upward and approaches the second conductor 340, the left end of the spring plate is bent downward by the magnetic force generated by the second magnet 320, the left end of the spring plate is electrically contacted with the first conductor 330, and the vacuum switch 300 is closed. When the second magnet 320 moves downward and is away from the second conductor 340, after the magnetic force of the second magnet 320 is lost, the deformed elastic sheet recovers the deformation and leaves the first conductor 330, so that the vacuum switch 300 is turned off.

In another preferred embodiment, as shown in fig. 10, two connection columns 517 are fixed on the vacuum tank 500, and the connection columns 517 are preferably formed integrally with the lower housing 511. Two ends of the first conductor 330 are fixedly connected with the two connecting columns 517 respectively, the two connecting columns 517 are located on two sides of the second detection cap 310 respectively, the second detection cap 310 is located in a space formed by the connecting columns 517 and the first conductor 330 in a surrounding mode, the right end of the second conductor 340 is fixedly connected with the connecting columns 517, and the left end of the second conductor 340 is a free end.

In another preferred embodiment, as shown in fig. 11, the switch structure further comprises a lid switch 700 for detecting whether the upper lid 510 is in an open or closed state, and the lid switch 700, the vacuum switch 300 and the vacuum pump 100 are connected in series in the same circuit loop. When the upper cover 510 is in an open state, the cover switch 700 is turned off, the interior of the vacuum tank 500 where the upper cover 510 is opened is communicated with the atmosphere, and the vacuum degree in the vacuum tank 500 is reduced, at this time, although the vacuum switch 300 is closed, the vacuum pump 100 cannot be powered to work and cannot be vacuumized because the cover switch 700 is turned off; only when the upper cover 510 is in the closed state, the vacuum switch 300 is closed, and the vacuum pump 100 is powered to operate.

In this embodiment, the lid switch 700 includes a third conductor provided on the body 520 of the vacuum tank 500 and a fourth conductor provided on the lid 510 of the vacuum tank 500, and when the lid 510 of the vacuum tank 500 is closed, the third conductor and the fourth conductor are in contact to close the lid switch 700, and when the lid 510 of the vacuum tank 500 is opened, the third conductor and the fourth conductor are separated to open the lid switch 700.

In another preferred embodiment, the vacuum switch 300 and the lid switch 700 are connected in series with the vacuum pump 100 in the same circuit by wires passing through the handle 530 and the base 600 of the vacuum tank 500, and the specific circuit connection of the vacuum switch 300 and the lid switch 700 is conventional and will not be described in detail herein.

EXAMPLE III

The structure principle of this embodiment is substantially the same as that of the first and second embodiments, except that a vacuum level gauge 440 for measuring the vacuum level inside the can 500 is further provided on the upper cover 510. As shown in fig. 6, in the present embodiment, the vacuum degree gauge 440 includes a first detection cap 441 made of an elastic material and communicated with the inside of the canister 500, and a gauge 442 fixedly connected to an upper end of the first detection cap 441 and extending out of the upper cover 510, and the gauge 442 has vacuum degree scales. The first sensing cap 441 includes, but is not limited to, a bellows type dish-shaped suction cup or an air bag, the volume of the first sensing cap 441 is vertically expandable and contractible, and the first sensing cap 441 is capable of being extended and contracted according to a change in the vacuum degree inside the can 500, thereby extending or retracting the scale 442 to the upper cover 510. Than be equipped with on the following casing 512 with jar body 500 inside communicating first detection mouth 515, first detection cap 441 is installed in first detection mouth 515 department, first detection cap 441 vertical setting, first detection cap 441 inside through first detection mouth 515 with jar body 500 inside communicating.

This embodiment sets up vacuum degree scale 440 on the upper cover, and people's accessible scale 442 looks over the vacuum in the vacuum tank 500 at ordinary times, avoids the condition of vacuum tank 500 hourglass evacuation or gas leakage.

Example four

The structural principle of this embodiment is basically the same as that of the first to third embodiments, except that a cover unlocking and locking structure for locking the upper cover 510 is provided between the can 520 and the upper cover 510. As shown in fig. 2 and 6, in the present embodiment, the upper cover 510 includes a lower shell 512 connected to the tank 500, and an upper shell 511 detachably connected to the lower shell 512, an accommodating space is formed between the upper shell 511 and the lower shell 512, and the upper shell 511 has a ventilation air gap communicated with the outside atmosphere; the bottom of the lower shell 512 is detachably connected with a ventilation cover 513, a ventilation air gap is arranged between the ventilation cover 513 and the lower shell 512, or ventilation holes are arranged on the ventilation cover 513. The lower shell 512 of the upper cover 510 is fixedly connected with a sealing ring 540, and the upper cover 510 is hermetically connected with the tank 500 through the sealing ring 540.

As shown in fig. 6 and 7, the cover unlocking and locking structure includes a latch 410 having a latch tongue 411 provided on an upper cover 510, and a locking groove 511 provided on the top of the can 500 to be capable of being engaged with the latch tongue 411. The latch 410 is transversely disposed in the accommodating space between the upper housing 511 and the lower housing 512, the latch tongue 411 is located at the leftmost end of the latch 410, and the locking groove 511 is located on the inner wall of the left side of the tank 500. When the latch tongue 411 is inserted into the locking groove 511, the upper cover 510 is locked with the tank 500; after the latch tongue 411 leaves the latch slot 511, the upper cover 510 is unlocked from the can 500. The upper cover 510 is provided with a pressure relief port 514 communicated with the inside of the tank 500, the pressure relief port 514 is arranged on the lower shell 512, the pressure relief port 514 is communicated with the outside atmosphere through a ventilation air gap of the upper shell 511, the pressure relief port 514 is communicated with the inside of the tank 500 through a ventilation cover 513, and a sealing plug 430 capable of sealing the pressure relief port 514 is arranged at the pressure relief port 514.

As shown in fig. 6 and 7, the top of the upper cover 510 is provided with a switch button 420 having an open state and a closed state, the switch button 420 is vertically slidably connected with the upper cover 510, the switch button 420 is connected with the latch 410 through a first transmission mechanism, the switch button 420 is connected with the sealing plug 430 through a second transmission mechanism, the switch button 420 is opened by pressing/lifting the switch button 420 downwards, the latch tongue 411 can move rightwards to be disengaged from the latch slot 511 for unlocking, and simultaneously the sealing plug 430 can act to open the pressure relief port 514. It is preferable that the present embodiment presses the switch knob 420 downward to put the switch knob 420 in an on state and lifts the switch knob 420 upward to put the switch knob 420 in an off state.

In the embodiment, by arranging the switch button 420, the first transmission mechanism and the second transmission mechanism, when the switch button 420 is pressed down to be in an open state, the upper cover 510 and the tank body 500 are unlocked while the pressure relief port 514 is opened, pressure is relieved and the tank body is unlocked by one key, and the operation is simple; when the switch button 420 is lifted to be in a closed state, the latch 411 is inserted into the locking groove 511 by the first actuator, the pressure relief port 514 is sealed by the sealing plug 430 by the second actuator, and the pressure relief port 514 is closed while the upper cover 510 is locked with the can 500.

As shown in fig. 6, in the present embodiment, since the vacuum gauge 440 is provided, when the switch button 420 is pushed down to relieve pressure, external air enters the interior of the can 500 through the pressure relief port 514, so that the air pressure in the interior of the can 500 is increased to reduce the negative pressure in the interior of the can 500, the air pressure is increased to expand the volume of the first detection cap 441 of the vacuum gauge 440, and the volume of the first detection cap 441 is expanded to move the gauge 442 upward to protrude out of the upper cover 510, so that one can determine the completion of pressure relief by observing the gauge 442.

In another preferred embodiment, as shown in fig. 7, the right end of the upper cover 510 is rotatably connected to the can 500 through a rotating shaft 550, a torsion spring (not shown) is sleeved on the rotating shaft 550, two torsion arms of the torsion spring are respectively connected to the upper cover 510 and the can 500, and after the upper cover 510 is unlocked and the can 500 is depressurized, the upper cover 510 can be opened under the elasticity of the torsion spring. The structure and principle of connecting the upper cover 510 and the can body 500 by a torsion spring are the same as those of the lid and the body of the kettle in the prior art, and the details of the prior art are omitted here.

When the upper cover 510 needs to be opened, a user presses the switch button 420 to enable the switch button to be in an open state, the pressure relief port 514 is opened while the upper cover 510 and the tank body 500 are unlocked, outside air enters the tank body 500 through the pressure relief port 514, air pressure inside the tank body 500 is increased, so that the adsorption force of negative pressure on the upper cover 510 is reduced, and the upper cover 510 is automatically opened under the action of the torsion spring until the adsorption force applied to the upper cover 510 by the negative pressure inside the tank body 500 is smaller than the elastic force of the torsion spring. Preferably, a damper is arranged between the torsion spring and the rotating shaft 550, and the damper plays a role in buffering, so that damping is increased in the opening process of the upper cover 510, the upper cover 510 is opened slowly, and the tank 500 is prevented from being overturned.

As shown in fig. 7 and 8, in another preferred embodiment, the first transmission mechanism includes a first inclined surface 422 provided on the switch knob 420 and a second inclined surface 412 provided on the plug 410 and capable of abutting against the first inclined surface 422, the first inclined surface 422 is inclined from left to right and from bottom to top, and the second inclined surface 412 and the first inclined surface 422 are inclined in the same direction and at the same angle. The plug pin 410 is elastically connected to the upper cover 510 through a first return spring 415, for example, the plug pin 410 has a guide column 416 extending rightward, the first return spring 415 is sleeved on the guide column 416, and two ends of the first return spring 415 are fixedly connected to or abutted against the plug pin 410 and the lower housing 512, respectively.

When the switch button 420 is pressed down to be opened, the first inclined surface 422 abuts against the second inclined surface 412 and moves relatively, so that the latch 410 compresses the first return spring 415 to move rightwards, the latch tongue 411 moves rightwards to be separated from the locking groove 511, and the upper cover 510 is unlocked from the tank 500. When the upper cover 510 is closed, a person presses the upper cover 510 to make the latch tongue 411 act on the top of the can 500 to compress the first return spring 415 to move the latch tongue 411 to the right, and continues to press the upper cover 510 until the latch tongue 411 is aligned with the locking groove 511, and the latch 410 moves to the left under the elastic force of the first return spring 415 to make the latch tongue 411 inserted into the locking groove 511, and at the same time, the latch 410 moves to the left to lift the switch button 420 to be in a closed state.

In another preferred embodiment, the cover unlocking and locking mechanism further includes a self-locking mechanism for locking the on-state switch button 420. As shown in fig. 7, the self-locking mechanism includes a locking stage 423 disposed on the switch button 420, and a buckle 413 disposed on the plug pin 410 and capable of being engaged with the locking stage 423, wherein the locking stage 423 is a step protruding rightward and disposed above the first inclined plane 422, the buckle 413 is a groove recessed rightward and disposed below the second inclined plane 412, and after the switch button 420 is opened, the locking stage 423 is engaged with the buckle 413 to lock the switch button 420.

After the self-locking mechanism is arranged, after the switch button 420 is pressed down to be opened, the first inclined surface 422 goes downwards to pass through the second inclined surface 412, the locking platform 423 is in clamping fit with the buckle 413 to lock the switch button 420, the switch button 420 is self-locked and is always in an open state, and in the pressure relief process, people are not required to press the switch button 420 all the time. After the switch button 420 is opened, the locking platform 423 is clamped with the buckle 413, under the elastic action of the first return spring 415, the self-locking of the switch button 420 is firmer, and the locking platform 423 is not easy to fall off from the buckle 413. In this embodiment, a person can press the latch 411 to move the latch 410 to the right, so that the latch 413 is disengaged from the locking stage 423, the self-locking of the switch button 420 is released, and then the switch button 420 is lifted up to be in the off state to be reset.

In another preferred embodiment, as shown in fig. 7, the switch button 420 is elastically connected to the upper cover 510 by a third return spring 424, for example, the lower end of the switch button 420 has a downwardly extending guide post 416, the third return spring 424 is sleeved on the guide post 416, and two ends of the third return spring 424 are respectively fixed to or abut against the switch button 420 and the lower housing 512. Thus, after the self-locking of the switch knob 420 is released, the switch knob 420 is moved upward to be in the off state by the elastic force of the third return spring 424.

In another preferred embodiment, the lid unlocking and locking mechanism further comprises an unlocking mechanism for unlocking the self-locking switch button 420, and the self-locking mechanism is actuated to unlock the switch button 420 under the action of the unlocking mechanism when the upper lid 510 is opened.

Specifically, as shown in fig. 7-9, the unlocking mechanism includes an open slot 414 opened on the latch 410, and an unlocking block 522 inserted into the open slot 414 fixed with respect to the tank 500. The open slot 414 is located at the right end of the bolt 410, and the open slot 414 is located between the lock slot 511 and the rotation shaft 550. The end surface of the unlocking block 522 close to the rotating shaft 550 is provided with an unlocking surface 5221, the distance between the unlocking surface 5221 and the rotating center of the rotating shaft 550 is gradually reduced from bottom to top, for example, the unlocking surface 5221 is an inclined surface or an arc surface which is inclined from left to right from bottom to top; as shown in fig. 9, the open groove 414 has an unlocking wall 4141 that can slide on the unlocking surface 5221, and the unlocking wall 4141 is a semi-cylindrical surface that protrudes to the right inner wall of the open groove 414.

In the process that the upper cover 510 is automatically opened under the action of the torsion spring, the upper cover 510 rotates upwards around the rotating shaft 550, the bolt 410 rotates together with the upper cover 510, the unlocking block 522 is fixed relative to the tank 500, the unlocking wall 4141 of the bolt 410 slides upwards on the unlocking surface 5221, the distance between the unlocking surface 5221 and the rotating center of the rotating shaft 550 is gradually reduced from bottom to top, the bolt 410 moves rightwards along with the rotation of the upper cover 510, so that the buckle 413 on the bolt 410 moves rightwards, the buckle 413 is separated from the locking platform 423, the self-locking of the switch button 420 is unlocked, and the switch button 420 moves upwards under the elastic force of the third return spring 424 to be in a closed state to be reset.

In the process of closing the upper cover 510, the upper cover 510 rotates downward about the rotation shaft 550, the latch 410 rotates together with the upper cover 510, the unlocking wall 4141 of the latch 410 slides leftward and downward on the unlocking surface 5221 by the first return spring 415, and the latch 410 moves leftward while rotating together with the upper cover 510, so that the latch 410 is reset.

In another preferred embodiment, as shown in fig. 6, the second transmission mechanism comprises a rod 431 rotatably connected to the upper cover 510 via a pin 432, a right lower end of the rod 431 is fixedly connected to an upper end of the sealing plug 430, and a left upper end of the rod 431 is a free end. The upper right end of the connecting rod 431 is elastically connected with the upper cover 510 through a second return spring 433, for example, the upper right end of the connecting rod 431 is provided with a guide post 416 extending upwards, the second return spring 433 is sleeved on the guide post 416, a fixing groove 516 fixedly connected with the lower shell 512 is arranged above the guide post 416, and two ends of the second return spring 433 are fixedly connected or abutted to the connecting rod 431 and the fixing groove 516 respectively.

The switch button 420 has an abutting part 421 extending outward and located above the left upper end of the link 431, and when the switch button 420 is in a closed state (i.e., in a normal state), the abutting part 421 of the switch button 420 is not in contact with the left upper end of the link 431; when the switch button 420 is pressed down to be in an open state, the abutting part 421 of the switch button 420 moves downwards to abut against the left upper end of the connecting rod 431 and rotate the connecting rod 431 counterclockwise around the pin shaft 432, and the connecting rod 431 rotates to move the sealing plug 430 upwards to open the pressure relief opening 514. When the switch knob 420 is reset to be in the closed state, the link 431 is rotated clockwise about the pin 432 by the elastic force of the second reset spring 423, so that the sealing plug 430 is moved downward to close the pressure relief port 514.

Example four

The present embodiment provides a cascaded vacuum storage apparatus, as shown in fig. 13, which in a preferred embodiment comprises a vacuum pump 100 and a plurality of vacuum tanks 500, the plurality of vacuum tanks 500 being cascaded in a lateral direction. Each vacuum tank 500 is correspondingly installed on a base 600 below the vacuum tank, the magnetic valve 200 in the first embodiment is installed in each base 600, and the magnetic valve 200 is a three-way valve.

In the present embodiment, the vacuum pump 100 is located at the leftmost side, and three vacuum tanks 500 are provided as an example, and the three vacuum tanks 500 have the same structure and principle, and the three bases 600 have the same structure and principle. Specifically, the first air pipe 101 of the left base 600 is connected to the air inlet of the vacuum pump 100 through the first port 301, and the second air pipe 102 of the left base 600 is connected to the lower end of the corresponding connecting pipe in the vacuum tank 500 through the second port 602. The third air pipe 103 of the left base 600 is connected to the first air pipe 101 of the middle base 600, and the second air pipe 102 of the middle base 600 is connected to the corresponding suction port 511 of the upper lid 510 of the vacuum tank 500. The third air pipe 103 of the middle base 600 is connected with the first air pipe 101 of the right base 600, the second air pipe 102 of the right base 600 is connected with the corresponding suction port 511 on the upper cover 510 of the vacuum tank 500, and the third port 603 of the right base 600 is provided with a plug 104 or a stop valve for sealing the third air pipe 103.

After the three vacuum tanks 500 are all mounted on the respective bases 600, the magnetic valves 200 in the three bases 600 are all opened, and the vacuum pump 100 is activated to evacuate the three vacuum tanks 500. As can be seen from fig. 5, the magnetic attraction force exerted by the first magnet 240 on the ferromagnetic substance 501 is greater than the negative pressure when the vacuum pump 100 is vacuumized, so as to ensure that the magnetic valve 200 is in the open state when the vacuum pump is vacuumized.

As shown in fig. 12, after the vacuum tank 500 is removed, for example, after the middle vacuum tank 500 is removed, the magnetic valve 200 in the middle base 600 is automatically closed, and as can be seen from fig. 4, the first air port 211 and the third air port 213 of the magnetic valve 200 of the middle base 600 are still communicated, and the third air pipe 103 of the left base 600 is communicated with the first air pipe 101 of the right base 600 sequentially through the first air pipe 101 and the third air pipe 103 of the middle base 600. Thus, after the middle vacuum tank 500 is removed, the vacuum pump 100 is started to evacuate the left and right vacuum tanks 500 without affecting the evacuation operation of the remaining two vacuum tanks 500.

In the present embodiment, as shown in fig. 12, each vacuum tank 500 is provided with a switch structure capable of being connected in series with the vacuum pump 100 in the same circuit loop, and the circuit loop in which the vacuum switch 300 and the lid switch 700 of each vacuum tank are located is arranged in parallel. Specifically, a cable interface having a positive electrode and a negative electrode connected by a wire may be respectively disposed at the left and right ends of the base 600, the cable interface at the left side of the base 600 is connected to the cable interface at the right side of the vacuum pump 100/upper stage base 600, and the cable interface at the right side of the base 600 is connected to the cable interface at the left side of the lower stage base 600.

EXAMPLE five

The present embodiment also provides a cascading type vacuum storage device, and the structure and principle of the present embodiment are substantially the same as those of the fourth embodiment, except that, as shown in fig. 15, in the present embodiment, a plurality of vacuum tanks 500 are vertically cascaded, and the structure and principle of the plurality of vacuum tanks 500 are the same. When a plurality of vacuum tanks 500 are vertically cascaded, the magnetic valve 200 of the first embodiment is disposed in the upper cover 510 at the top of the vacuum tank 500, and the bottom of the upper vacuum tank 500 is mounted on the upper cover 510 of the lower vacuum tank 500, so that the upper cover 510 of the lower vacuum tank 500 corresponds to a base.

When the magnetic valve 200 is provided in the base 600, the base 600 may close the upper end opening of the valve seat 210, and a cap may not be provided. As shown in fig. 15, when the magnetic valve 200 is installed in the upper cap 510, the upper end opening of the valve seat 210 is not closed, and therefore, the upper end opening needs to be closed by the cap 250.

In this embodiment, three vacuum tanks 500 are vertically disposed, and the vacuum pump 100 is located at the leftmost position and connected to the lowermost base 600, and the lowermost vacuum tank 500 connected to the base 600 is the first-stage vacuum tank 500, the middle vacuum tank 500 is the second-stage vacuum tank 500, and the uppermost vacuum tank 500 is the third-stage vacuum tank 500.

Specifically, the first air pipe 101 of the base 600 is connected to the air inlet of the vacuum pump 100 through a first port 601, the right side of the base 600 is provided with a plug 104 or a stop valve for closing the third air pipe 103, the second air pipe 102 of the base 600 is connected to the fourth port 503 at the bottom of the lowermost vacuum tank 500 through a second port 602, the fifth port 504 at the top of the lowermost vacuum tank 500 is connected to the fourth port 503 at the bottom of the intermediate vacuum tank 500, and the fifth port 504 at the top of the intermediate vacuum tank 500 is connected to the fourth port 503 at the bottom of the intermediate vacuum tank 500. Since the vacuum tank 500 is not mounted on the uppermost vacuum tank 500, the magnetic valve 200 in the upper cover 510 of the uppermost vacuum tank 500 is in a closed state.

After the three vacuum tanks 500 are vertically cascaded, the magnetic valves 200 in the upper covers 510 of the base 600 and the two vacuum tanks 500 below are both in an open state, and the magnetic valve 200 in the upper cover 510 of the uppermost vacuum tank 500 is in a closed state, so that the three vacuum tanks 500 can be evacuated by starting the vacuum pump 100. Because the first check valve 512 is arranged at the suction port 511 of each vacuum tank 500, the vacuum in each vacuum tank 500 is independent, and when a plurality of vacuum tanks 500 are cascaded, the vacuum of all the vacuum tanks 500 cannot be released because one vacuum tank 500 releases the vacuum.

As shown in fig. 15, since the vacuum vessel 500 has the second check valve 513 which allows only gas to flow down from the first gas pipe 100 of the magnetic valve 200 in the upper cover 510 to the fourth port 503. Therefore, when one vacuum tank 500 is used alone, one can remove the vacuum pump 100 or use another handheld vacuum pump to align the air inlet of the vacuum pump 100 with the fifth port 504 at the top of the upper cover 510 of the vacuum tank 500, and then start the vacuum pump 100, as shown in fig. 4 and 5, the negative pressure makes the valve core 230 move upwards to open the magnetic valve 200, so that the second air pipe 102 connected with the magnetic valve 200 is communicated with the third air pipe 103 and the first air pipe 101 at the same time, and due to the action of the second one-way valve 513, the vacuum pump 100 only vacuums the vacuum tank 500 connected with the vacuum pump 100 to realize the one-tank moving air-suction sealing function of the vacuum tank 500, and at this time, the air in the vacuum tank 500 is exhausted from the vacuum pump 100 after passing through the third air pipe 103, the magnetic valve 200 and the second air pipe 102.

In the present embodiment, each vacuum tank 500 is also provided with a switch structure capable of being connected in series with the vacuum pump 100 in the same circuit loop, and the circuit loop in which the vacuum switch 300 and the lid switch 700 of each vacuum tank are located is arranged in parallel. Specifically, a cable interface having a positive electrode and a negative electrode may be respectively disposed at the corresponding positions of the bottom and the top of the vacuum tank 500, the cable interface at the bottom is connected to the cable interface at the top through a conducting wire passing through the handle 530, and a cable interface is also disposed at the cable interface at the top of the base 600 corresponding to the bottom of the vacuum tank. Whereby when the lowermost vacuum tank 500 is mounted on the base 600, the base 600 is electrically connected to the lowermost vacuum tank 500; when the upper vacuum tank 500 is mounted on the lower vacuum tank 500, the cables are connected.

It should be noted that, after the plurality of vacuum tanks 500 are vertically cascaded, the scale 442 shown in fig. 1 is covered by the vacuum tank 500 above the scale 442, so that a gap or a transparent window for observing the scale 442 can be formed at the bottom of the vacuum tank 500 to facilitate people to check the vacuum degree in the tank 520 through the scale 442.

EXAMPLE six

The present embodiment provides a vacuum storage apparatus of a cascade type, and the structure and principle of the present embodiment are substantially the same as those of the fourth and fifth embodiments, except that, as shown in fig. 16, in the present embodiment, a plurality of vacuum tanks 500 are cascaded in the horizontal and vertical directions. Fig. 16 shows nine vacuum tanks 500 arranged, the nine vacuum tanks 500 forming a grid of nine squares, three rows and three columns. The connection mode and the working principle of the vertical cascade are described in detail in the fifth embodiment, and are not described herein; in the horizontal cascade, only the lowermost row of vacuum tanks 500 is mounted on the base 600, and the connection manner and operation principle thereof are described in detail in the fourth embodiment, which is not repeated herein. The vacuum tanks 500 in each row are communicated with each other through the lowermost base 600, and there is no connection interface between each row of vacuum tanks 500 and the vacuum tanks 500.

In the description herein, reference to the description of the terms "preferred embodiment," "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A vacuum storage device is characterized by comprising a vacuum tank, a base and a vacuum pump for vacuumizing the vacuum tank, wherein the bottom of the vacuum tank is provided with a fourth interface which can be communicated with the inside of the vacuum tank;

the vacuum tank is provided with a switch structure which can be connected in series with the vacuum pump in the same circuit loop, the switch structure comprises a vacuum switch, the vacuum tank is provided with a second detection port communicated with the inside of the vacuum tank, the vacuum switch comprises a second detection cap which is arranged at the second detection port and made of elastic materials, the inside of the second detection cap is communicated with the inside of the vacuum tank through the second detection port, a second magnet is fixedly connected onto the second detection cap, the vacuum tank is further connected with two conductors which are positioned on the outer side of the second detection cap, the two conductors and the enabling end of the vacuum pump are connected in series in the same circuit loop, the two conductors are respectively a first conductor and a second conductor, the first conductor is fixedly arranged, and the magnetic force of the second magnet enables the second conductor to be close to or far away from the first conductor;

the second detection cap can stretch and contract along with the change of the vacuum degree in the vacuum tank, so that the second magnet is close to or far away from the second conductor;

when the second magnet is close to the second conductor, under the action of the magnetic force of the second magnet, the second conductor can be electrically contacted with the first conductor to close the vacuum switch; when the second magnet is far away from the second conductor, the second conductor is far away from the first conductor to open the vacuum switch;

the magnetic valve is arranged in the base and comprises a valve seat and a valve body which is positioned in the valve seat and fixedly connected with the valve seat, the valve seat is provided with a first air port and a second air port which are communicated with the interior of the valve seat, the first air port and the second air port are respectively connected with a first connector and a second connector of the base through pipelines, the valve body is provided with a vent hole which is simultaneously communicated with the first air port and the second air port, and the interior of the valve seat is also movably connected with a valve core which can seal the vent hole;

the magnetic valve also comprises a first magnet and a ferromagnetic substance which can be attracted by the first magnet, one of the first magnet and the ferromagnetic substance is fixedly connected at the bottom of the vacuum tank, and the other one is fixedly connected with the valve core;

when the fourth interface of the vacuum tank is disconnected with the second interface of the base and is far away from the magnetic valve, the valve core seals the vent hole under the action of gravity, and the first air port and the second air port are not communicated;

when the vacuum tank is arranged on the base to enable the fourth interface to be in butt joint with the second interface, under the action of magnetic attraction force generated by the first magnet on the ferromagnetic substance, the valve core is far away from the vent hole to open the vent hole, and the first air port is communicated with the second air port.

2. The vacuum storage device as claimed in claim 1, wherein the valve seat further has a third air port communicating with the interior of the valve seat, the third air port is always communicated with the first air port, the valve seat is provided with a third port located at the opposite side of the first port, the third air port is connected with the third port through a pipeline, and the third port is provided with a plug or a stop valve for closing the third port.

3. The vacuum storage device according to claim 1, wherein a fifth port corresponding to the fourth port is arranged at the top of the vacuum tank, a magnetic valve having a first air port, a second air port and a third air port is installed at the top of the vacuum tank, the first air port of the magnetic valve is always communicated with the third air port, an on-off valve for controlling on-off is arranged between the first air port and the second air port, the first air port is connected with the fourth port of the vacuum tank through a pipeline, the second air port is connected with the fifth port of the vacuum tank through a pipeline, and the third air port is connected with the inside of the vacuum tank through a pipeline.

4. A vacuum storage device according to claim 3, wherein the pipeline connecting the third port of the magnetic valve with the interior of the vacuum tank is provided with a first check valve only allowing the gas in the vacuum tank to flow toward the magnetic valve;

and/or a second one-way valve which only allows gas to flow from the first air port to the fourth interface is arranged on a pipeline connecting the first air port of the magnetic valve and the fourth interface of the vacuum tank.

5. The vacuum storage device according to claim 1, wherein the vacuum tank comprises a tank body and an upper cover for closing a tank opening of the tank body, and a cover unlocking and locking structure for locking and unlocking the upper cover is arranged between the tank body and the upper cover;

the cover body unlocking and locking structure comprises a bolt with a lock tongue and a lock groove, wherein the bolt is arranged on the upper cover, the lock groove is arranged on the tank body and can be matched with the lock tongue in an inserting mode, the upper cover is provided with a pressure relief opening communicated with the inside of the tank body, and a sealing plug capable of sealing the pressure relief opening is arranged at the pressure relief opening;

the top of the upper cover is provided with a switch button with an opening state and a closing state, the switch button is connected with the bolt through a first transmission mechanism, the switch button is connected with the sealing plug through a second transmission mechanism, the switch button is opened by pressing/lifting the switch button, the lock tongue can be separated from the lock groove to unlock, and meanwhile, the sealing plug can act to open the pressure relief opening.

6. The vacuum storage device according to claim 5, wherein the upper cover is rotatably connected with the tank body through a rotating shaft, a torsion spring is sleeved on the rotating shaft, two torsion arms of the torsion spring are respectively connected with the upper cover and the tank body, and after the upper cover is unlocked and the tank body is depressurized, the upper cover can be opened under the elasticity of the torsion spring.

7. The vacuum storage device as claimed in claim 5, wherein the first transmission mechanism comprises a first inclined surface provided on the switch button and a second inclined surface provided on the latch pin, the first inclined surface and the second inclined surface are in elastic connection with each other, the latch pin is matched with the first inclined surface and can be abutted against each other, when the switch button is opened, the first inclined surface and the second inclined surface abut against each other and move relatively, so that the latch bolt moves in a direction away from the lock groove and is separated from the lock groove;

and/or the second transmission mechanism comprises a connecting rod which is rotatably connected with the upper cover through a pin shaft, the first end of the connecting rod is fixedly connected with the sealing plug, the second end of the connecting rod is a free end, when the switch button is in a closed state, the switch button is not in contact with the second end of the connecting rod, and when the switch button is in an open state, the switch button can be abutted against the second end of the connecting rod and enables the connecting rod to rotate around the pin shaft, so that the sealing plug moves towards the direction far away from the pressure relief opening.

8. The vacuum storage device according to claim 5, wherein the lid unlocking and locking structure further comprises a self-locking mechanism for locking the switch button in an open state, the self-locking mechanism comprises a lock platform arranged on the switch button and a lock catch arranged on the bolt and capable of being in clamping fit with the lock platform, and after the switch button is opened, the lock platform is in clamping fit with the lock catch to lock the switch button;

the bolt is elastically connected with the upper cover through a first reset spring, and the switch button is elastically connected with the upper cover through a third reset spring;

lid unblock and locking structure still include right self-locking mechanism carries out the release mechanism of unblock, the in-process that the upper cover was opened under release mechanism's effect, self-locking mechanism moves and makes shift knob unblock, the one end that the locked groove was kept away from to the upper cover through the pivot with jar body rotates and connects, release mechanism is including seting up open slot on the bolt and relative jar fixed inserting unblock piece in the open slot, the open slot is located between locked groove and the pivot, the terminal surface that the unblock piece is close to the pivot has the face of unblock, the distance between face of unblock and the pivot rotation center is supreme reducing gradually from down, the open slot has can gliding unblock wall on the unblock face, opens the in-process of upper cover, the wall of unblock is in the face of unblock upwards slides and makes the spring bolt is to the direction motion of keeping away from the locked groove, thereby makes self-locking mechanism unblock.

9. A vacuum storage device as claimed in any of claims 5 to 8, wherein the vacuum tank comprises a tank body and an upper lid closing a tank opening of the tank body, the vacuum switch is mounted in the upper lid of the vacuum tank, the switch structure further comprises a lid switch for detecting whether the upper lid is in an open or closed state, and the lid switch and the vacuum switch are connected in series in the same circuit loop;

the cover switch comprises a third conductor arranged on the vacuum tank body and a fourth conductor arranged on the vacuum tank upper cover, when the vacuum tank upper cover is closed, the third conductor is in contact with the fourth conductor to close the cover switch, and when the vacuum tank upper cover is opened, the third conductor is separated from the fourth conductor to disconnect the cover switch.

10. A vacuum storage device according to any of claims 5 to 8, wherein the upper lid is provided with a vacuum level gauge for measuring the vacuum level inside the can, the vacuum level gauge comprises a first detection cap made of an elastic material and communicated with the inside of the can, and a gauge fixedly connected with the first detection cap and extending out of the upper lid, and the first detection cap can extend and retract along with the change of the vacuum level inside the can, so that the gauge extends or retracts out of the upper lid.

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