CN110329653B - Foam pump with breathing tablet - Google Patents
Foam pump with breathing tablet Download PDFInfo
- Publication number
- CN110329653B CN110329653B CN201910659039.7A CN201910659039A CN110329653B CN 110329653 B CN110329653 B CN 110329653B CN 201910659039 A CN201910659039 A CN 201910659039A CN 110329653 B CN110329653 B CN 110329653B
- Authority
- CN
- China
- Prior art keywords
- main valve
- air
- piston
- large piston
- pump body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000029058 respiratory gaseous exchange Effects 0.000 title claims abstract description 51
- 239000006260 foam Substances 0.000 title claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 56
- 238000003825 pressing Methods 0.000 claims abstract description 21
- 238000005187 foaming Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000000241 respiratory effect Effects 0.000 claims description 4
- 238000007664 blowing Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 241000195940 Bryophyta Species 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000008266 hair spray Substances 0.000 description 1
- 239000004619 high density foam Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000011929 mousse Nutrition 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1001—Piston pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/0018—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam
- B05B7/0025—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam with a compressed gas supply
Landscapes
- Closures For Containers (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Abstract
一种带有呼吸片的泡沫泵，由喷嘴按压头、螺圈盖和泵体组成，其中泵体包括泵体外壳、进液单向阀、大活塞、主阀杆、阀针、杆底活塞、弹簧、固定卡圈组成。它独特设计了呼吸片结构，通过呼吸片、主阀杆和大活塞三者相配合，进气更顺畅，进气腔的压力更大，能产生更大的内压力，气液混合均匀，泡沫丰富。
A foam pump with a breathing piece is composed of a nozzle pressing head, a spiral cover and a pump body, wherein the pump body includes a pump body shell, a liquid inlet check valve, a large piston, a main valve stem, a valve needle, a rod bottom piston, a spring and a fixed clamp ring. It has a unique design of a breathing piece structure. Through the coordination of the breathing piece, the main valve stem and the large piston, the air intake is smoother, the pressure of the air intake cavity is greater, and a greater internal pressure can be generated, the gas and liquid are mixed evenly, and the foam is rich.
Description
Technical Field
The invention relates to a pump, in particular to a foam pump with a breathing sheet.
Background
Foam pump is also called foam pump, is used in the container package such as liquid soap, liquid detergent, mousse, hair spray on, is connected with a liquid pump in bottleneck part, is provided with the air inlet chamber near the liquid pump, and after high-pressure liquid and compressed air mix, through the very dense foaming net of mesh, produces a large amount of foams, flows from the spout of pressing the head.
Such as CN201110128683.5, which is a spring external foam pump, is disposed in a screw cap of a liquid container, the spring external foam pump is filled with liquid when the liquid container is specifically used, a user quantitatively extracts the liquid in the liquid container by pressing the spring external foam pump, and in the process of completing the action of extracting the liquid, the extracted liquid is mixed with air by means of the spring external foam pump, and the spring external foam pump comprises a liquid extracting cavity, an air inlet cavity and a liquid-air mixing cavity. The liquid suction cavity is used for accommodating liquid to be pumped out, the air inlet cavity is used for providing air to be mixed, the liquid to be pumped out and the air to be mixed provided by the air inlet cavity are mixed in the liquid-gas mixing cavity, finally the liquid is discharged out of the foam pump with the external spring, and the return spring is arranged in the air inlet cavity.
The prior foam pump adopts a piston-like air valve when sucking air and compressed air, adopts an inflator-like manner to supply the compressed air, closes an air inlet valve when a large piston is attached to a connecting cover, opens the air inlet valve when the large piston is separated from the connecting cover, closes an air blowing valve when a pull rod valve plate is attached to a connecting rod valve plate, and opens the air blowing valve when the pull rod valve plate is separated from the connecting rod valve plate. The large piston, the connecting cover, the pull rod valve plate and the connecting rod structure valve plate are required to be arranged in the air inlet cavity, and the structure is complex. And when air is taken in and blown, negative pressure can be respectively generated on the air intake valve and the blowing valve, after the internal pressure of the air intake cavity is increased, the air intake valve can be pushed open, finally the internal pressure of the air intake cavity is reduced, the air pressure generated by the blowing valve is limited, and higher closed internal pressure can not be generated.
In addition, when the foam pump is reset, the foaming liquid in the mixing cavity can flow back into the air inlet cavity along the air inlet valve. So that a part of foaming liquid remains in the air inlet cavity, and the space for effective gas exchange of the air inlet cavity is reduced. And is also unfavorable for generating the next working of the air inlet cavity. Thus, when the nozzle is pressed a number of times rapidly, the foaming effect becomes worse.
Disclosure of Invention
The invention aims to solve the technical problems of providing the foam pump with the breathing sheet structure, which realizes the ventilation operation of the air inlet cavity by utilizing the breathing action of the breathing sheet, has simpler structure and convenient installation, can improve the internal pressure of the air inlet cavity, generates more atmospheric pressure in the mixing cavity, has uniform foam generation, and has rich foam and better durability.
The invention solves the problems by adopting the technical scheme that the foam pump with the breathing sheet consists of a nozzle pressing head, a spiral cover and a pump body, wherein the pump body comprises a pump body shell, a liquid inlet one-way valve, a large piston, a main valve rod, a valve needle, a rod bottom piston, a spring and a fixing clamping ring, an air inlet cavity is formed between the large piston and the pump body shell, a liquid inlet cavity is formed between the liquid inlet one-way valve and the valve needle, a high-pressure liquid cavity is formed between the main valve rod and the upper section of the large piston, a mixing cavity is arranged above the large piston, and a foaming net is arranged in the mixing cavity. The main valve rod is provided with an elastic bracket, the outer side of the elastic bracket is connected with a lifting ring, the lifting ring is contacted with the outer edge of the breathing sheet, the elastic bracket pushes the breathing sheet against the bottom of the inner wall of the large piston, the inner side of the breathing sheet is provided with a plurality of petal-shaped bodies, the breathing sheet is arranged on the elastic bracket, part of the breathing sheet is clamped by the bracket of the main valve rod and the large piston, the main valve rod bracket below the petal-shaped bodies is provided with an expiration valve hole, the upper part of the petal-shaped bodies is provided with an expiration hole and a high-pressure air flow channel on the large piston, and the high-pressure air flow channel and the high-pressure liquid cavity are communicated with the mixing cavity.
Further, the breathing sheet and the lifting ring matched with the breathing sheet are round or regular polygon.
Further, a positioning sheet is arranged on the main valve rod and is matched with a gap between petal-shaped bodies on the inner side of the breathing sheet to limit the rotation of the breathing sheet.
Further, the pump body shell is fixedly connected with the spiral cover, the spiral cover is in sliding connection with the nozzle pressing head, and the spiral cover limits the nozzle pressing direction, the moving direction of the large piston and the main valve rod, so that the large piston and the main valve rod can only move up and down along the central shaft.
Further, the bottom piston is arranged between the main valve rod and the valve needle, and is allowed to slide up and down between the main valve rod and the valve needle, and the bottom piston and the inner wall of the liquid inlet cavity are in sliding friction. When the main valve rod moves downwards, the bottom piston moves upwards relative to the valve needle to expose the inner hole of the valve needle, and when the main valve rod moves upwards, the bottom piston moves downwards relative to the valve needle to close the inner hole of the valve needle.
Further, the high-pressure air flow channel is formed by a gap between the inner wall of the large piston and the top of the main valve rod, and the exhalation hole of the main valve rod is communicated with the high-pressure air flow channel.
Further, the liquid inlet cavity one-way valve consists of steel balls, conical holes and anti-drop bayonet.
Further, the upper part of the pump body shell is provided with an air pressure balance hole, and when the large piston is positioned at the lowest position, the air pressure balance hole communicates outside air with air in the bottle.
Compared with the prior art, the invention adopts the breathing sheet structure to control the air inlet cavity, and has the advantages that the pump body is provided with the elastic breathing sheet, and the air inlet cavity can be filled with air and discharged at a good rhythm as the breathing of a human body is controlled by one breath and one breath of the breathing sheet, so that the air inlet cavity is smooth in air suction and high in air discharge pressure.
When the nozzle pressing head is reset by the spring, the flap body on the inner side of the breathing sheet is closed, and residual liquid in the mixing cavity cannot be sucked into the air inlet cavity.
Compared with the air inlet cavity structure in the comparison document, the breathing sheet type air inlet mode is adopted, the breathing sheet, the main valve rod and the large piston are matched, air inlet is smoother, the pressure of the air inlet cavity is larger, larger internal pressure can be generated, the air and the liquid are uniformly mixed, and the foam is rich. When the air inlet cavity is in air suction, the petal-shaped body is completely propped up by the pressure difference between the atmosphere and the negative pressure in the air inlet cavity, so that no air leakage occurs, and when the air inlet cavity is out of air, the outer edge of the breathing sheet and the lifting ring are pressed by the pressure difference between the high-pressure air of the lower side of the large piston and the air inlet cavity and the external pressure, so that no air leakage occurs.
The high-pressure gas in the air inlet cavity is prevented from being leaked in the prior art by adopting a mode of friction between the piston and the inner wall of the pump body. The mixing cavity can generate larger air pressure and stronger air flow, the foam is rich and uniform, and the foam state is maintained for a long time.
When the foam pump resets, the flap body can stop the foaming liquid from flowing back, so that the foaming liquid is prevented from entering the air inlet cavity, the foam pump is pressed for a plurality of times, and the foaming effect is still good.
Drawings
Fig. 1 is an external view.
Fig. 2 is a cross-sectional view of the present invention along the direction of the nozzle.
Fig. 3 is a state diagram of the present invention at reset.
Fig. 4 is a state diagram of the present invention for depressing the nozzle pressing head. (the cross section is rotated 30 degrees about the central axis as compared to fig. 3).
Fig. 5 is an enlarged view at a of fig. 3.
Fig. 6 is an enlarged view at B of fig. 4.
Fig. 7 is a top view of a respiratory slice.
Fig. 8 is a perspective view of the upper side structure of the main valve stem.
Fig. 9 is a perspective view of the underside structure of the main valve stem.
Fig. 10 is an enlarged view at C of fig. 2.
Fig. 11 is an enlarged view of D of fig. 4.
Wherein 1 is a nozzle pressing head, 2 is a spiral cover, 3 is a pump body, 4 is a mixing cavity, 5 is a main valve rod, 6 is a breathing sheet, 7 is a large piston, 8 is a valve needle, 9 is a rod bottom piston, 10 is a sealing plug, 11 is a steel ball, 12 is a conical hole, 13 is an anti-drop bayonet, and 14 is an air pressure balance hole.
51 Is an elastic bracket, 52 is an exhalation valve hole, 53 is a positioning sheet, 54 is a lifting ring, 61 is a petal-shaped body, 62 is the outer edge of a breathing sheet, 71 is an inhalation hole, 72 is an exhalation hole, and 81 is an inner hole of a valve needle.
101 Is the feed liquor chamber, 102 is the inlet air chamber, 103 is the mixing chamber, 104 is the high-pressure liquid chamber, 105 is the high-pressure air current passageway.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
A foam pump with a breathing sheet is composed of a nozzle pressing head, a screw cover and a pump body, wherein the pump body comprises a pump body shell, a liquid inlet check valve, a large piston, a main valve rod, a valve needle, a rod bottom piston, a spring and a fixing collar, an air inlet cavity is formed between the large piston and the pump body shell, a liquid inlet cavity is formed between the liquid inlet check valve and the valve needle, a high-pressure liquid cavity is formed between the main valve rod and the upper section of the large piston, a mixing cavity is arranged above the large piston, and a foaming net is arranged in the mixing cavity. The main valve rod is provided with an elastic bracket, the outer side of the elastic bracket is connected with a lifting ring, the lifting ring is contacted with the outer edge of the breathing sheet, the elastic bracket pushes the breathing sheet against the bottom of the inner wall of the large piston, the inner side of the breathing sheet is provided with a plurality of petal-shaped bodies, the breathing sheet is arranged on the elastic bracket, part of the breathing sheet is clamped by the bracket of the main valve rod and the large piston, the main valve rod bracket below the petal-shaped bodies is provided with an expiration valve hole, the upper part of the petal-shaped bodies is provided with an expiration hole and a high-pressure air flow channel on the large piston, and the high-pressure air flow channel and the high-pressure liquid cavity are communicated with the mixing cavity.
The breathing sheet and the lifting ring matched with the breathing sheet are round or regular polygon, and the embodiment adopts round design.
The rosette on the respiratory slice needs to correspond to the position of the exhalation valve orifice on the main valve rod. In order to prevent the limiting breathing piece from rotating and avoiding dislocation between the breathing piece and the expiration valve hole, a positioning piece is arranged on the main valve rod, the positioning piece is matched with a gap between petal-shaped bodies on the inner side of the breathing piece, and when the breathing piece and a lifting ring matched with the positioning piece are designed in a regular polygon mode, the positioning piece structure is not adopted, and other positioning groove modes are used for limiting the rotation of the breathing piece.
The pump body shell is fixedly connected with the spiral cover, the spiral cover is in sliding connection with the nozzle pressing head, and the spiral cover limits the nozzle pressing direction, the moving direction of the large piston and the main valve rod, so that the main valve rod can only move up and down along the central shaft.
The bottom piston is arranged between the main valve rod and the valve needle and is allowed to slide up and down between the main valve rod and the valve needle, and the bottom piston and the inner wall of the liquid inlet cavity are in sliding friction. When the main valve rod moves downwards, the bottom piston moves upwards relative to the valve needle to expose the inner hole of the valve needle, and when the main valve rod moves upwards, the bottom piston moves downwards relative to the valve needle to close the inner hole of the valve needle.
The gap between the inner wall of the large piston and the top of the main valve rod forms a high-pressure air flow channel, and the air blowing hole of the main valve rod is communicated with the high-pressure air flow channel.
The liquid inlet cavity one-way valve consists of steel balls, conical holes and anti-drop bayonet, and the anti-drop bayonet prevents the steel balls from dropping out of the conical holes.
The upper part of the pump body shell is provided with an air pressure balance hole through which external air is communicated with the bottle.
High-density foam nets are arranged at two ends of the mixing cavity, and can generate a large amount of foam under the pushing of high-pressure air flow to enter the nozzle pressing head.
When the nozzle pressing head is pressed down, the lower end of the nozzle pressing head presses the large piston and the large piston drives the main valve rod to synchronously move downwards, at the moment, the outer side of the breathing sheet is fixed on the inner wall of the large piston by the lifting ring and synchronously moves downwards, the upper part of the petal-shaped body on the inner side is provided with an expiration hole, after the air pressure is increased, the petal-shaped body on the inner side of the breathing sheet is pushed by high-pressure air in the air inlet cavity, the petal-shaped body elastically deforms to form an expiration channel, high-pressure air in the air inlet cavity flows through the expiration channel and the high-pressure air channel along the expiration valve hole on the main valve rod and enters the air-liquid mixing cavity, namely an expiration process, and as the main valve rod moves downwards, the piston at the bottom of the rod upwards moves back due to friction with the liquid inlet cavity, the liquid in the liquid inlet cavity is allowed to enter the mixing cavity.
The foaming liquid and the high-pressure air are mixed in the mixing cavity, a large amount of foam is generated after passing through the high-density meshes on the upper side and the lower side of the mixing cavity, and the foam is sprayed out along the internal channel of the nozzle pressing head.
When the large piston reaches the maximum downward stroke, the piston wall of the large piston descends, the air pressure balance hole on the pump body shell is opened, and the air in the bottle is communicated with the atmosphere to realize ventilation.
When the nozzle pressing head is released, the main valve rod drives the large piston to reset and move upwards under the upward thrust of the spring, the petal-shaped body on the inner side of the breathing sheet is propped against the main valve rod at the moment, meanwhile, due to the fact that negative pressure exists in the air inlet cavity and pressure difference exists between the outside air, the expiration valve hole is covered by the petal-shaped body, the expiration channel is completely closed, due to the fact that the negative pressure exists in the air inlet cavity, the outside air pressure and the pressure difference in the air inlet cavity force the outer edge of the breathing sheet to drive the lifting ring to deform downwards, the elastic bracket deforms, an inspiration channel is formed between the outer edge of the expiration sheet and the large piston, and the air inlet cavity is filled with air.
In the process of inspiration, the valve needle moves upwards along with the main valve rod, the piston at the bottom of the rod cuts off the inner channel of the valve needle, the space of the liquid inlet cavity is increased to generate negative pressure, and foaming liquid in the bottle enters the liquid inlet cavity for storage along the suction pipe and pushing away the steel balls after moving along the one-way valve.
In the air suction process, the main valve rod moves upwards to push the petal-shaped body at the inner side of the breathing sheet to seal the air suction hole, so that foaming liquid can be effectively prevented from being sucked into the air inlet cavity.
When the air suction is finished, the large piston is reset, the air pressure balance hole is blocked, and the foaming liquid in the bottle is prevented from leaking.
Claims (6)
1. A foam pump with a breathing sheet consists of a nozzle pressing head, a spiral ring cover and a pump body, wherein the pump body comprises a pump body shell, a liquid inlet check valve, a large piston, a main valve rod, a valve needle, a rod bottom piston, a spring and a fixing clamping ring, an air inlet cavity is formed between the large piston and the pump body shell, a liquid inlet cavity is formed between the liquid inlet check valve and the valve needle, a high-pressure liquid cavity is formed between the main valve rod and the upper section of the large piston, a mixing cavity is formed above the large piston, and a foaming net is arranged in the mixing cavity.
2. The foam pump with the breathing sheet of claim 1, wherein the pump body housing is fixedly connected with a screw cap, the screw cap is slidably connected with the nozzle pressing head, and the screw cap limits the movement direction of the nozzle pressing and the large piston and the main valve rod, so that the nozzle pressing and the large piston and the main valve rod can only move up and down along the central shaft.
3. The foam pump with a breathing sheet of claim 1 wherein the bottom piston is disposed between the main valve stem and the valve needle and is allowed to slide up and down between the main valve stem and the valve needle, the bottom piston sliding against the inner wall of the liquid inlet chamber, the bottom piston moving up to expose the valve needle bore when the main valve stem moves down, and the bottom piston closing the valve needle bore when the main valve stem moves up.
4. The foam pump with a respiratory slice of claim 1, wherein the high-pressure air flow channel is formed by a gap between an inner wall of the large piston and a top of the main valve rod, and an exhalation port of the main valve rod is communicated with the high-pressure air flow channel.
5. The foam pump with the breathing sheet of claim 1, wherein the liquid inlet check valve is composed of steel balls, conical holes and anti-drop bayonet.
6. The foam pump with a respiratory slice of claim 1, wherein the upper part of the pump body shell is provided with an air pressure balance hole which communicates outside air with air in the bottle when the large piston is positioned at the lowest position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910659039.7A CN110329653B (en) | 2019-07-22 | 2019-07-22 | Foam pump with breathing tablet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910659039.7A CN110329653B (en) | 2019-07-22 | 2019-07-22 | Foam pump with breathing tablet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110329653A CN110329653A (en) | 2019-10-15 |
| CN110329653B true CN110329653B (en) | 2024-12-31 |
Family
ID=68146850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910659039.7A Active CN110329653B (en) | 2019-07-22 | 2019-07-22 | Foam pump with breathing tablet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110329653B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112320060A (en) * | 2020-11-03 | 2021-02-05 | 温州联豪化妆品有限公司 | Glass bead extrusion type foam pump and method for generating foam by foam pump |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10324357A (en) * | 1997-05-26 | 1998-12-08 | Daiwa Can Co Ltd | Pump type foaming container |
| CN210311612U (en) * | 2019-07-22 | 2020-04-14 | 沈利庆 | Foam pump with breathing sheet |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090008413A1 (en) * | 2007-04-17 | 2009-01-08 | Choi Hee Jin | Airless dispensing pump container with an airtight push down type nozzle head |
| JP5873247B2 (en) * | 2011-03-22 | 2016-03-01 | 大和製罐株式会社 | Pump type foam discharge container |
| CN102204796B (en) * | 2011-05-18 | 2015-07-22 | 梅元红 | Foam pump with external spring |
| US8360283B1 (en) * | 2011-08-17 | 2013-01-29 | Zhejiang JM Industry Co., Ltd | Liquid foaming pump |
| JP6434225B2 (en) * | 2014-04-16 | 2018-12-05 | 株式会社ダイゾー | Injection products |
| CN205554988U (en) * | 2016-04-14 | 2016-09-07 | 宁波圣捷喷雾泵有限公司 | Push type emulsion pump |
| CN105923253B (en) * | 2016-05-20 | 2017-10-03 | 浙江正庄实业有限公司 | Push type foam pump and its fuel injection quantity control method |
| CN206954844U (en) * | 2017-06-06 | 2018-02-02 | 余姚市宝明日用品有限公司 | Foam pump |
-
2019
- 2019-07-22 CN CN201910659039.7A patent/CN110329653B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10324357A (en) * | 1997-05-26 | 1998-12-08 | Daiwa Can Co Ltd | Pump type foaming container |
| CN210311612U (en) * | 2019-07-22 | 2020-04-14 | 沈利庆 | Foam pump with breathing sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110329653A (en) | 2019-10-15 |
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