CN109896163B - Automatic air-extracting sealing box cover and working method thereof - Google Patents
Automatic air-extracting sealing box cover and working method thereof Download PDFInfo
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- CN109896163B CN109896163B CN201910281128.2A CN201910281128A CN109896163B CN 109896163 B CN109896163 B CN 109896163B CN 201910281128 A CN201910281128 A CN 201910281128A CN 109896163 B CN109896163 B CN 109896163B
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- 238000007789 sealing Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims description 8
- 239000000523 sample Substances 0.000 claims abstract description 8
- 238000009423 ventilation Methods 0.000 claims description 59
- 238000004891 communication Methods 0.000 claims description 27
- 230000003993 interaction Effects 0.000 claims description 19
- 238000005452 bending Methods 0.000 claims description 13
- 239000004973 liquid crystal related substance Substances 0.000 claims description 13
- 239000012528 membrane Substances 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 238000004382 potting Methods 0.000 claims description 6
- 239000013013 elastic material Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005381 potential energy Methods 0.000 claims description 3
- 239000003566 sealing material Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 2
- 238000009530 blood pressure measurement Methods 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- KKQWHYGECTYFIA-UHFFFAOYSA-N 2,5-dichlorobiphenyl Chemical compound ClC1=CC=C(Cl)C(C=2C=CC=CC=2)=C1 KKQWHYGECTYFIA-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
- B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Percussion Or Vibration Massage (AREA)
Abstract
An automatic air-extracting sealing box cover comprises a bottom cover and a top cover which are detachably connected with each other; the bottom cover and the top cover are connected to form an equipment cavity, and an automatic air exhaust device is arranged in the equipment cavity; the automatic air extracting device comprises a power supply, a pressure sensor, an air pump and a controller; the power supply is connected with the pressure sensor, the air pump and the power supply input end of the controller; the probe of the air pump and the pressure sensor is exposed out of the lower surface of the bottom cover; the output end of the pressure sensor is connected with the acquisition circuit, and the output end of the acquisition circuit is connected with the input end of the controller; the control signal output end of the controller is connected with the switch control end of the air pump. The invention can realize automatic pressure measurement and air suction and ensure the air pressure value in the storage cavity.
Description
Technical Field
The invention belongs to the technical field of storage, and particularly relates to an automatic air-extracting sealing box cover and a working method thereof.
Background
In the prior art, when articles (such as easily oxidized articles, foods and the like) are stored at normal temperature or low temperature, the method is preferably to adopt vacuum pumping or inert gas filling under the sealing condition. From the aspects of convenient operation and monitoring convenience, the vacuumizing mode is more preferable in most cases, and a vacuumizing sealing box of a manual air pump is arranged at present, and the principle of the vacuumizing sealing box is that the manual air pump (also provided with an air pressure meter) is fixedly/detachably connected on the sealing box. This structure is convenient in the storage condition of general condition because personnel often observe the sealed box under the warehouse state, if pressure and requirement deviate (under the normal condition, leak gas etc.) appears, then bleed. Under the storage condition that the number of the sealing boxes is large, pressure abnormality is difficult to be found in time by custodians (generally, patrol or spot check).
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a novel automatic air-extracting sealing box cover and a working method thereof.
An automatic air-extracting sealing box cover comprises a bottom cover and a top cover which are detachably connected with each other; the bottom cover and the top cover are connected to form an equipment cavity, and an automatic air exhaust device is arranged in the equipment cavity;
the automatic air extracting device comprises a power supply, a pressure sensor, an air pump and a controller; the power supply is connected with the pressure sensor, the air pump and the power supply input end of the controller; the air pump air extraction opening and the probe of the pressure sensor are arranged in the storage cavity (in the use state, the box cover covers the box body, and the box cover and the box body enclose the storage cavity); the output end of the pressure sensor is connected with the acquisition circuit, and the output end of the acquisition circuit is connected with the pressure signal input end of the controller; the control signal output end of the controller is connected with the switch control end of the air pump (a medical air pump can be adopted).
The acquisition circuit includes: the first operational amplifier and the second operational amplifier; the first signal output end and the second signal output end of the pressure sensor are respectively connected with the same-phase end of the first operational amplifier and the second operational amplifier, and the opposite-phase ends of the first operational amplifier and the second operational amplifier are respectively connected with the output ends of the first operational amplifier and the second operational amplifier; the output ends of the first operational amplifier and the second operational amplifier are respectively connected with the inverting end and the non-inverting end of the third operational amplifier after being connected with the first voltage dropping resistor and the second voltage dropping resistor in series, and the output end of the third operational amplifier is connected with the pressure signal input end of the controller after being connected with the third voltage dropping resistor in series; an RC parallel circuit is arranged between the inverting terminal and the output terminal of the third operational amplifier; the output end of the fourth operational amplifier is connected with the same-phase end of the third operational amplifier after being connected with a fourth voltage-reducing resistor in series, and the inverting end of the fourth operational amplifier is connected with the output end; the first voltage-dividing resistor and the second voltage-dividing resistor are connected in series between the +2.5V direct current power supply end and the grounding end, and the in-phase end of the fourth operational amplifier is connected with the connecting ends of the first voltage-dividing resistor and the second voltage-dividing resistor.
The controller is a singlechip (preferably 51 series singlechip) and is connected with a touch display screen; the touch display screen comprises a liquid crystal screen driving circuit connected with the controller, a liquid crystal screen connected with the output end of the liquid crystal screen driving circuit, and a touch controller connected with the touch control signal input end of the liquid crystal screen.
The controller controls the air pump through the MOS tube switch circuit.
The system also comprises a man-machine interaction module; the signal output end of the man-machine interaction module is connected with the man-machine interaction signal input end of the microcontroller; the signal input end of the man-machine interaction module is connected with the man-machine interaction signal output end of the microcontroller. (the man-machine interaction module can be a touch screen)
The communication unit is also included; the signal output end of the communication unit is connected with the communication signal input end of the microcontroller; the signal input end of the communication unit is connected with the communication signal output end of the microcontroller; the output end of the power supply is connected with the power supply input end of the communication unit; the communication unit is a Bluetooth communication module and/or a WIFI communication module.
The upper surface of the bottom cover is provided with a grid for placing the pressure sensor main body, the bottom surface of the grid is provided with a through hole, a probe of the pressure sensor is communicated with the storage cavity from the through hole, potting adhesive is filled in the grid, and a wire of the pressure sensor extends out of the potting adhesive;
the upper surface of the bottom cover is provided with a clamping position for placing an air pump, the air pump is fixed in the clamping position, and an elastic isolation pad is connected between the outer shell of the air pump and the clamping position;
the man-machine interaction module is a touch display screen; a hollow frame is arranged on the top cover, the touch display screen is arranged in the hollow frame, and an elastic sealing material is filled between the edge of the touch display screen and the inner edge of the hollow frame;
the PCB board where the controller is located is fixed on the upper surface of the bottom cover;
the power supply is a storage battery which is detachably connected in a positioning groove on the upper surface of the bottom cover.
In engineering implementation, the upper surface of the bottom cover is provided with a plurality of reinforcing ribs, and lattices formed by the reinforcing ribs can be used as lattices, clamping positions, positioning grooves and the like for placing electric devices and the like.
The edge of the top cover is provided with an annular groove with a downward opening, the edge of the bottom cover is provided with an upward annular convex edge, the convex edge is correspondingly arranged in the groove, a circle of expansion water-blocking filling rope is filled in the groove bottom, and a sealing rubber ring is arranged outside the expansion water-blocking filling rope;
the convex rib is provided with a convex block in the horizontal direction, the wall of the groove is provided with a hole corresponding to the convex block, and the convex block is arranged in the hole under the connection state of the bottom cover and the top cover.
The box cover is also connected with a pressure relief mechanism, and the pressure relief mechanism comprises an electromagnetic valve and a pressure relief air pipe; an air inlet of the pressure relief air pipe is communicated with the storage cavity, and an air outlet of the pressure relief air pipe is communicated with the atmosphere; the electromagnetic valve is connected to the pressure relief air pipe, and the controller controls the switch of the electromagnetic valve through the MOS tube switch circuit;
alternatively, the pressure relief mechanism includes: the device comprises a shell, a bubble film, a film fixing block, a first ventilation column, a pressure spring and a second ventilation column;
the shell is connected with the box cover, the top end of the shell is exposed out of the upper surface of the top cover, and the bottom end of the shell is arranged on the lower surface of the bottom cover;
the inner cavity of the shell is a cylindrical cavity, and the two ends of the cylindrical cavity are provided with a first through hole and a second through hole; the cylindrical cavity is communicated with the storage cavity through a first through hole, and is communicated with the atmosphere through a second through hole;
the second ventilation column penetrates into the cylindrical cavity from a first through hole of the cylindrical cavity, the first ventilation column penetrates into the cylindrical cavity from a second through hole, the top end of the second ventilation column is fixed at the tail end of the first ventilation column, and ventilation holes penetrating through the first ventilation column and the second ventilation column are formed in the first ventilation column and the second ventilation column;
the outer wall of the lower part of the second ventilation column is provided with a first annular rib, the outer diameter of the first annular rib is larger than the inner diameter of the first through hole, a sealing structure is arranged between the first annular rib and the first through hole, and the first annular rib is outside the cylindrical cavity; the pressure spring is connected between the second ventilation column and the cylindrical cavity; a gap is reserved between the outer wall of the second ventilation column and the inner wall of the cylindrical cavity;
the opening end of the second through hole is connected with a bending edge facing the axis of the cylindrical cavity, and the inner diameter of a circular through hole formed by the bending edge is smaller than the inner diameter of the cylindrical cavity;
the outer wall of the lower part of the first ventilation column is connected with a second annular rib, the second annular rib is arranged in the cylindrical cavity, and a sealing structure is connected between the top surface of the second annular rib and the bottom surface of the bending edge;
the outer diameter of the first ventilation column is smaller than the inner diameter of the circular through hole, and the outer diameter of the second annular convex rib is smaller than the inner diameter of the cylindrical cavity and larger than the inner diameter of the circular through hole;
the air bubble film covers the top surface of the first ventilation column, the top surface of the first ventilation column is provided with a concave, the opening of the ventilation hole is formed in the concave surface, and a gap is reserved between the bottom surface of the air bubble film and the concave surface; the membrane fixing block is annular, the membrane fixing block is pressed on the edge of the bubble membrane, and the edge of the bubble membrane is connected with the concave in a sealing way;
the bubble film is an elastic film made of elastic materials, the middle of the bubble film is convex in a normal state, and the middle of the bubble film is concave in a state that the bottom surface pressure of the bubble film is smaller than the top surface pressure; the middle position of the bubble film is arranged in the hollow of the annular film fixing block;
when the elastic potential energy of the pressure spring is minimum, the first annular rib is sealed with the first through hole, and the second annular rib is sealed with the bottom surface of the bending edge.
The automatic air-extracting sealing box using the box cover comprises a box body and a box cover and is characterized in that a bottom cover is detachably and hermetically connected with the box body, and a sealing ring is arranged at the joint of the bottom cover and the box cover; the box body and the box cover are connected to form a storage cavity.
The working method of the sealing box cover is characterized by comprising the following steps of: when the motor is started, automatically stopping when the pressure reaches a set upper limit value; when the pressure reaches a set lower limit, the air pump is automatically started until an upper limit is reached.
The invention can realize automatic pressure measurement and air suction and ensure the air pressure value in the storage cavity.
Drawings
FIG. 1 is a schematic view of the self-venting seal cartridge of the present embodiment;
FIG. 2 is a schematic top view of the lid of the embodiment
FIG. 3 is a schematic bottom view of the automatic air-extracting seal box cover of the embodiment
FIG. 4 is an electrical schematic diagram of the present embodiment (electromagnetic valves of the electrically operated pressure relief mechanism are shown in schematic form for clarity of illustration);
fig. 5 is a schematic view showing the positions of respective electric devices on the upper surface of the bottom cover of the present embodiment;
fig. 6 is a schematic cross-sectional structure of a schematic relief valve of the present embodiment;
fig. 7 is a schematic view of the top/bottom cover connection structure of the present embodiment;
FIG. 8 is a schematic diagram of a pressure sensor and acquisition circuit in an embodiment;
FIG. 9 is a schematic diagram of a controller and acquisition circuit in an embodiment;
FIG. 10 is a schematic diagram of a liquid crystal display and touch controller in an embodiment;
in the figure: the box body 1, the box cover 2, the bottom cover 3, the top cover 4, a power supply (rechargeable storage battery) 5, a battery charging terminal 6, a through hole 7 where a probe of a pressure sensor is located, an air pump 8, a PCB 9, a touch display screen 10, a sealing ring 11, an air bubble film 12, a film fixing block 13, a first ventilation column 14, a pressure spring 15, a second ventilation column 16, a cylindrical cavity 17, an air vent 18, a first annular convex rib 19, a bending edge 20, a second annular convex rib 21, a lower convex 22 formed on the lower surface of the bottom cover where the storage battery is located, an air pumping hole position (a one-way valve plate is arranged on the air pumping hole) 23, a position 24 where a pressure release mechanism is located in this example, a groove 25 at the edge of the top cover, a convex rib 26 at the edge of the bottom cover, an expansion water blocking filling rope 27, a sealing rubber ring 28 and a convex block 29, and a hole 30 corresponding to the convex block.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description below:
example 1
As shown in figure 1, the automatic air-extracting sealing box comprises a box body and a box cover, wherein the box body and the box cover are detachably connected, and a sealing ring is arranged at the joint of the box body and the box cover; the box body and the box cover are connected to form a storage cavity, and in the embodiment, the box body and the box cover are connected through folding earrings.
As shown in fig. 2-5, the automatic air extracting device comprises a power supply, a pressure sensor, an air pump and a controller; the power supply is connected with the pressure sensor, the air pump (preferably a miniature air pump) and the power supply input end of the controller; the probe of the pressure sensor is arranged in the storage cavity; the output end of the pressure sensor is connected with the acquisition circuit, and the output end of the acquisition circuit is connected with the pressure signal input end of the controller; the control signal output end of the controller is connected with the switch control end of the air pump.
The acquisition circuit includes: a first operational amplifier IC11 and a second operational amplifier IC12; the first signal output end and the second signal output end of the pressure sensor IC3 are respectively connected with the same-phase end of the first operational amplifier and the second operational amplifier, and the opposite-phase ends of the first operational amplifier and the second operational amplifier are respectively connected with the output ends of the first operational amplifier and the second operational amplifier; the output ends of the first operational amplifier and the second operational amplifier are respectively connected in series with a first voltage-reducing resistor R13 and a second voltage-reducing resistor R14 and then connected with the inverting end and the non-inverting end of the third operational amplifier, and the output end of the third operational amplifier is connected in series with a third voltage-reducing resistor R20 and then connected with the pressure signal input end of the controller; an RC parallel circuit (corresponding to a resistor R11 and a capacitor C11 respectively) is arranged between the inverting terminal and the output terminal of the third operational amplifier IC 13; the output end of the fourth operational amplifier IC14 is connected with the same-phase end of the third operational amplifier after being connected with a fourth voltage-reducing resistor R12 in series, and the inverting end of the fourth operational amplifier IC14 is connected with the output end; the first voltage dividing resistor and the second voltage dividing resistor (corresponding to the resistors R22 and R19 respectively) are connected in series between the +2.5V direct current power supply end and the grounding end, and the in-phase end of the fourth operational amplifier IC14 is connected with the connecting ends of the first voltage dividing resistor and the second voltage dividing resistor.
The controller is a singlechip IC7 (preferably 51 series singlechip), and is connected with a touch display screen; the touch display screen comprises a liquid crystal screen driving circuit (an integrated circuit IC2 with the model of TM1621C is adopted, a liquid crystal screen IC4 (optionally up to 10.1 inch of display screen-model G101STN01. D) connected with the output end of the liquid crystal screen driving circuit, and a touch controller IC5 (optionally with the model of GT9147, FT3206, CY8CTST110 or the like) connected with the touch control signal input end of the liquid crystal screen.
The controller controls the air pump through the MOS tube switch circuit.
The system also comprises a man-machine interaction module; the signal output end of the man-machine interaction module is connected with the man-machine interaction signal input end of the microcontroller; the signal input end of the man-machine interaction module is connected with the man-machine interaction signal output end of the microcontroller.
The communication unit is also included; the signal output end of the communication unit is connected with the communication signal input end of the microcontroller; the signal input end of the communication unit is connected with the communication signal output end of the microcontroller; the output end of the power supply is connected with the power supply input end of the communication unit.
The communication unit is a Bluetooth communication module and/or a WIFI communication module.
The box cover comprises a bottom cover and a top cover which are detachably connected with each other; the bottom cover and the top cover are connected to form an equipment cavity, and the automatic air exhaust device is arranged in the equipment cavity; the bottom cover is detachably and hermetically connected with the box body;
the upper surface of the bottom cover is provided with a grid for placing the pressure sensor main body, the bottom surface of the grid is provided with a through hole, a probe of the pressure sensor is communicated with the storage cavity from the through hole, potting adhesive is filled in the grid, and a wire of the pressure sensor extends out of the potting adhesive;
the upper surface of the bottom cover is provided with a clamping position for placing an air pump, the air pump is fixed in the clamping position, and an elastic isolation pad is connected between the outer shell of the air pump and the clamping position;
the man-machine interaction module is a touch display screen; a hollow frame is arranged on the top cover, the touch display screen is arranged in the hollow frame, and an elastic sealing material is filled between the edge of the touch display screen and the inner edge of the hollow frame;
the PCB board where the controller is located is fixed on the upper surface of the bottom cover;
the power supply is a storage battery which is detachably connected in a positioning groove on the upper surface of the bottom cover.
As shown in fig. 7, the edge of the top cover is provided with an annular groove with a downward opening, the edge of the bottom cover is provided with an upward annular convex edge, the convex edge is correspondingly arranged in the groove, a circle of expansion water-blocking filling rope is filled in the groove bottom, and a sealing rubber ring is arranged outside the expansion water-blocking filling rope; the convex rib is provided with a convex block in the horizontal direction, the wall of the groove is provided with a hole corresponding to the convex block, and the convex block is arranged in the hole under the connection state of the bottom cover and the top cover.
And the box cover is also connected with a pressure release mechanism.
One way is (electric way), the pressure release mechanism includes electromagnetic valve and pressure release air pipe; an air inlet of the pressure relief air pipe is communicated with the storage cavity, and an air outlet of the pressure relief air pipe is communicated with the atmosphere; the electromagnetic valve is connected to the pressure relief air pipe, and the controller controls the switch of the electromagnetic valve through the MOS tube switch circuit.
As shown in fig. 6, another way is (mechanically), the pressure release mechanism includes: the device comprises a shell, a bubble film, a film fixing block, a first ventilation column, a pressure spring and a second ventilation column;
the shell is connected with the box cover, the top end of the shell is exposed out of the upper surface of the top cover, and the bottom end of the shell is arranged on the lower surface of the bottom cover;
the inner cavity of the shell is a cylindrical cavity, and the two ends of the cylindrical cavity are provided with a first through hole and a second through hole; the cylindrical cavity is communicated with the storage cavity through a first through hole, and is communicated with the atmosphere through a second through hole;
the second ventilation column penetrates into the cylindrical cavity from a first through hole of the cylindrical cavity, the first ventilation column penetrates into the cylindrical cavity from a second through hole, the top end of the second ventilation column is fixed at the tail end of the first ventilation column, and ventilation holes penetrating through the first ventilation column and the second ventilation column are formed in the first ventilation column and the second ventilation column;
the outer wall of the lower part of the second ventilation column is provided with a first annular rib, the outer diameter of the first annular rib is larger than the inner diameter of the first through hole, a sealing structure is arranged between the first annular rib and the first through hole, and the first annular rib is outside the cylindrical cavity; the pressure spring is connected between the second ventilation column and the cylindrical cavity; a gap is reserved between the outer wall of the second ventilation column and the inner wall of the cylindrical cavity;
the opening end of the second through hole is connected with a bending edge facing the axis of the cylindrical cavity, and the inner diameter of a circular through hole formed by the bending edge is smaller than the inner diameter of the cylindrical cavity;
the outer wall of the lower part of the first ventilation column is connected with a second annular rib, the second annular rib is arranged in the cylindrical cavity, and a sealing structure is connected between the top surface of the second annular rib and the bottom surface of the bending edge;
the outer diameter of the first ventilation column is smaller than the inner diameter of the circular through hole, and the outer diameter of the second annular convex rib is smaller than the inner diameter of the cylindrical cavity and larger than the inner diameter of the circular through hole;
the air bubble film covers the top surface of the first ventilation column, the top surface of the first ventilation column is provided with a concave, the opening of the ventilation hole is formed in the concave surface, and a gap is reserved between the bottom surface of the air bubble film and the concave surface; the membrane fixing block is annular, the membrane fixing block is pressed on the edge of the bubble membrane, and the edge of the bubble membrane is connected with the concave in a sealing way;
the bubble film is an elastic film made of elastic materials, the middle of the bubble film is convex in a normal state, and the middle of the bubble film is concave in a state that the bottom surface pressure of the bubble film is smaller than the top surface pressure; the middle position of the bubble film is arranged in the hollow of the annular film fixing block;
when the elastic potential energy of the pressure spring is minimum, the first annular rib is sealed with the first through hole, and the second annular rib is sealed with the bottom surface of the bending edge.
Example 2
The operation method of the touch display screen in embodiment 1 includes:
automatic pressure parameter setting: the negative pressure measurement standard gauge is connected and covered, the POWER key is three-clicked, the 88.8 key is displayed in the middle number, the SET key is pressed, the upper row number is increased by 1, and the pressing is released until the display is achieved: 5.
pressing POWER, entering restore factory settings: automatically setting the highest pressure to be-22 KPa and the lowest pressure to be-15 KPa, and storing.
When negative pressure exists, starting timing, and displaying accumulated time (hours) on a first row of green numbers of the LCD screen; zero clearing is performed when the negative pressure is not present.
The second row of numbers shows the current pressure (-Kpa).
Pressing the SET key for a long time, the upper row displays the lower limit value of the SET pressure.
The "POWER" key was pressed for a long time, the upper row displayed the upper limit value of the set pressure, and after 5 seconds, the battery voltage value (/ 100V) was displayed.
Double-clicking a POWER key to start or close the working state of the air pump, and automatically stopping when the pressure reaches a set upper limit value during the state of the motor; when the pressure reaches a set lower limit, the air pump is automatically started until an upper limit is reached.
The Kpa mark blinks when the motor is in a working state, and is always bright when the motor is stopped.
Double-clicking the SET key, canceling the working state of the motor, switching on the electromagnetic valve to deflate until the air pressure drop is 0.1KPA or 20 seconds, and then delaying for 2 seconds to stop the electromagnetic valve, wherein the Kpa mark is not bright during deflation.
After the user decompresses the cover to access the article, when the user needs to repress, the user clicks the POWER key to restart.
User settings: three strokes of the "POWER" key, the intermediate display "88.8" presses the upper row number of the SET key plus 1, releases the pressing until the display: 3.
pressing POWER, entering the upper and lower limit settings: the upper flicker in the two seconds represents the set upper pressure limit and the lower flicker represents the set lower pressure limit. The "SET" key may be increased by pressing or decreased by pressing the "POWER" key without first pressing the "SET" key.
After the setting, the POWER key is pressed for a long time until the two rows of numbers display 0 and 0.0, and the working state is returned after the setting is finished.
And (3) electric quantity display: four grids with full brightness above 4.2V, 3.9V-4.2V, three grids, 3.7V-3.9V, two grids, 3.6V-3.7V, one grid, no brightness below 3.5-3.6V, and battery frame flash below 3.5V.
When the screen is required to be turned on, the POWER and SET keys are simultaneously pressed for more than 0.5 seconds, and the LCD screen can be activated to be turned on.
Alarm when pressure is not reached within 60 seconds: the display screen blinks three times per second, and the user pushes any key to exit.
The P-' corresponds to a closing state when being normally on, and the motor can not be started automatically at the moment. The flashing represents an operating condition and the motor will maintain the air pressure between the set maximum and minimum values.
It is apparent that the above examples are merely illustrative of the present invention and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious changes and modifications which come within the spirit of the invention are desired to be protected.
Claims (6)
1. An automatic air-extracting sealing box cover is characterized in that: comprises a bottom cover and a top cover which are detachably connected with each other; the bottom cover and the top cover are connected to form an equipment cavity, and an automatic air exhaust device is arranged in the equipment cavity;
the automatic air extracting device comprises a power supply, a pressure sensor, an air pump and a controller; the power supply is connected with the pressure sensor, the air pump and the power supply input end of the controller; the probe of the air pump and the pressure sensor is exposed out of the lower surface of the bottom cover; the output end of the pressure sensor is connected with the acquisition circuit, and the output end of the acquisition circuit is connected with the pressure signal input end of the controller; the control signal output end of the controller is connected with the switch control end of the air pump;
the acquisition circuit includes: a first operational amplifier (IC 11) and a second operational amplifier (IC 12); the first signal output end and the second signal output end of the pressure sensor are respectively connected with the same-phase end of the first operational amplifier and the second operational amplifier, and the opposite-phase ends of the first operational amplifier and the second operational amplifier are respectively connected with the output ends of the first operational amplifier and the second operational amplifier; the output ends of the first operational amplifier and the second operational amplifier are respectively connected in series with a first voltage dropping resistor (R13) and a second voltage dropping resistor (R14) and then connected with the inverting end and the non-inverting end of the third operational amplifier, and the output end of the third operational amplifier is connected in series with a third voltage dropping resistor (R20) and then connected with the pressure signal input end of the controller; an RC parallel circuit is arranged between the inverting terminal and the output terminal of the third operational amplifier (IC 13); the output end of the fourth operational amplifier (IC 14) is connected with the same-phase end of the third operational amplifier after being connected with a fourth voltage-reducing resistor (R12) in series, and the inverting end of the fourth operational amplifier (IC 14) is connected with the output end; the first voltage-dividing resistor and the second voltage-dividing resistor are connected in series between a +2.5V direct current power supply end and a grounding end, and the same-phase end of the fourth operational amplifier (IC 14) is connected with the connecting ends of the first voltage-dividing resistor and the second voltage-dividing resistor;
the controller controls the air pump through a MOS tube switch circuit;
the controller is a singlechip and is connected with a touch display screen; the touch display screen comprises a liquid crystal screen driving circuit connected with the controller, a liquid crystal screen connected with the output end of the liquid crystal screen driving circuit, and a touch controller connected with the touch control signal input end of the liquid crystal screen;
the automatic air extraction sealing box cover also comprises a man-machine interaction module; the signal output end of the man-machine interaction module is connected with the man-machine interaction signal input end of the microcontroller; the signal input end of the man-machine interaction module is connected with the man-machine interaction signal output end of the microcontroller.
2. The automatic air-extracting seal box cover according to claim 1, wherein: the communication unit is also included; the signal output end of the communication unit is connected with the communication signal input end of the microcontroller; the signal input end of the communication unit is connected with the communication signal output end of the microcontroller; the output end of the power supply is connected with the power supply input end of the communication unit;
the communication unit is a Bluetooth communication module and/or a WIFI communication module.
3. The automatic air-extracting seal box cover according to claim 2, wherein: the upper surface of the bottom cover is provided with a grid for placing the pressure sensor main body, the bottom surface of the grid is provided with a through hole, a probe of the pressure sensor is communicated with the lower surface of the bottom cover from the through hole, potting adhesive is filled in the grid, and a wire of the pressure sensor extends out of the potting adhesive;
the upper surface of the bottom cover is provided with a clamping position for placing an air pump, the air pump is fixed in the clamping position, and an elastic isolation pad is connected between the outer shell of the air pump and the clamping position;
the man-machine interaction module is a touch display screen; a hollow frame is arranged on the top cover, the touch display screen is arranged in the hollow frame, and an elastic sealing material is filled between the edge of the touch display screen and the inner edge of the hollow frame;
the PCB board where the controller is located is fixed on the upper surface of the bottom cover;
the power supply is a storage battery which is detachably connected in a positioning groove on the upper surface of the bottom cover.
4. The automatic air-extracting seal box cover according to claim 1, wherein: the edge of the top cover is provided with an annular groove with a downward opening, the edge of the bottom cover is provided with an upward annular convex edge, the convex edge is correspondingly arranged in the groove, a circle of expansion water-blocking filling rope is filled in the groove bottom, and a sealing rubber ring is arranged outside the expansion water-blocking filling rope;
the convex rib is provided with a convex block in the horizontal direction, the wall of the groove is provided with a hole corresponding to the convex block, and the convex block is arranged in the hole under the connection state of the bottom cover and the top cover.
5. The automatic air-extracting seal box cover according to claim 1, wherein: the box cover is also connected with a pressure relief mechanism, and the pressure relief mechanism comprises an electromagnetic valve and a pressure relief air pipe; an air inlet of the pressure relief air pipe is communicated with the lower surface of the bottom cover, and an air outlet of the pressure relief air pipe is communicated with the atmosphere; the electromagnetic valve is connected to the pressure relief air pipe, and the controller controls the switch of the electromagnetic valve through the MOS tube switch circuit;
alternatively, the pressure relief mechanism includes: the device comprises a shell, a bubble film, a film fixing block, a first ventilation column, a pressure spring and a second ventilation column;
the shell is connected with the box cover, the top end of the shell is exposed out of the upper surface of the top cover, and the bottom end of the shell is arranged on the lower surface of the bottom cover;
the inner cavity of the shell is a cylindrical cavity, and the two ends of the cylindrical cavity are provided with a first through hole and a second through hole; the cylindrical cavity is communicated with the lower surface of the bottom cover through a first through hole, and is communicated with the atmosphere through a second through hole;
the second ventilation column penetrates into the cylindrical cavity from a first through hole of the cylindrical cavity, the first ventilation column penetrates into the cylindrical cavity from a second through hole, the top end of the second ventilation column is fixed at the tail end of the first ventilation column, and ventilation holes penetrating through the first ventilation column and the second ventilation column are formed in the first ventilation column and the second ventilation column;
the outer wall of the lower part of the second ventilation column is provided with a first annular rib, the outer diameter of the first annular rib is larger than the inner diameter of the first through hole, a sealing structure is arranged between the first annular rib and the first through hole, and the first annular rib is outside the cylindrical cavity; the pressure spring is connected between the second ventilation column and the cylindrical cavity; a gap is reserved between the outer wall of the second ventilation column and the inner wall of the cylindrical cavity;
the opening end of the second through hole is connected with a bending edge facing the axis of the cylindrical cavity, and the inner diameter of a circular through hole formed by the bending edge is smaller than the inner diameter of the cylindrical cavity;
the outer wall of the lower part of the first ventilation column is connected with a second annular rib, the second annular rib is arranged in the cylindrical cavity, and a sealing structure is connected between the top surface of the second annular rib and the bottom surface of the bending edge;
the outer diameter of the first ventilation column is smaller than the inner diameter of the circular through hole, and the outer diameter of the second annular convex rib is smaller than the inner diameter of the cylindrical cavity and larger than the inner diameter of the circular through hole;
the air bubble film covers the top surface of the first ventilation column, the top surface of the first ventilation column is provided with a concave, the opening of the ventilation hole is formed in the concave surface, and a gap is reserved between the bottom surface of the air bubble film and the concave surface; the membrane fixing block is annular, the membrane fixing block is pressed on the edge of the bubble membrane, and the edge of the bubble membrane is connected with the concave in a sealing way;
the bubble film is an elastic film made of elastic materials, the middle of the bubble film is convex in a normal state, and the middle of the bubble film is concave in a state that the bottom surface pressure of the bubble film is smaller than the top surface pressure; the middle position of the bubble film is arranged in the hollow of the annular film fixing block;
when the elastic potential energy of the pressure spring is minimum, the first annular rib is sealed with the first through hole, and the second annular rib is sealed with the bottom surface of the bending edge.
6. The method for operating the automatic air-extracting sealing box cover according to claim 1, which is characterized in that: when the motor is started, automatically stopping when the pressure reaches a set upper limit value; when the pressure reaches a set lower limit, the air pump is automatically started until an upper limit is reached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16/513,596 US11891228B2 (en) | 2018-11-19 | 2019-07-16 | Automatic suction sealing box and working method thereof |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018218984954 | 2018-11-19 | ||
| CN201821898495 | 2018-11-19 | ||
| CN201910234522 | 2019-03-26 | ||
| CN2019102345220 | 2019-03-26 |
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| CN109896163A CN109896163A (en) | 2019-06-18 |
| CN109896163B true CN109896163B (en) | 2023-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910281128.2A Active CN109896163B (en) | 2018-11-19 | 2019-04-09 | Automatic air-extracting sealing box cover and working method thereof |
| CN201920471561.8U Active CN210063923U (en) | 2018-11-19 | 2019-04-09 | Automatic air-tight seal lid of taking out and seal box |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920471561.8U Active CN210063923U (en) | 2018-11-19 | 2019-04-09 | Automatic air-tight seal lid of taking out and seal box |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN109896163B (en) |
| WO (1) | WO2020103381A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109896163B (en) * | 2018-11-19 | 2023-12-12 | 江苏百思福科技股份有限公司 | Automatic air-extracting sealing box cover and working method thereof |
| CN112623493B (en) * | 2020-12-04 | 2022-10-11 | 浙江千翊科技有限公司 | Fresh-keeping box |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2020103381A1 (en) | 2020-05-28 |
| CN210063923U (en) | 2020-02-14 |
| CN109896163A (en) | 2019-06-18 |
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