CN215585791U - Negative pressure generating system and waste collecting equipment - Google Patents
Negative pressure generating system and waste collecting equipment Download PDFInfo
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- CN215585791U CN215585791U CN202121703415.7U CN202121703415U CN215585791U CN 215585791 U CN215585791 U CN 215585791U CN 202121703415 U CN202121703415 U CN 202121703415U CN 215585791 U CN215585791 U CN 215585791U
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- pressure generating
- dust
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- 239000002699 waste material Substances 0.000 title claims abstract description 85
- 239000000428 dust Substances 0.000 claims abstract description 45
- 238000001914 filtration Methods 0.000 claims abstract description 32
- 238000007664 blowing Methods 0.000 claims description 31
- 238000000034 method Methods 0.000 abstract description 5
- 238000000746 purification Methods 0.000 abstract description 5
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 239000007787 solid Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Refuse Collection And Transfer (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The utility model relates to a garbage collection technical field, in particular to negative pressure generates system and garbage collection equipment, including the negative pressure chamber, the negative pressure generates the subassembly, filtering component and exhaust subassembly, the inside that makes the negative pressure chamber through the negative pressure generates the subassembly continuously keeps the negative pressure, make the outside air in intercommunication negative pressure chamber get into the negative pressure intracavity, the filtering component that sets up in the negative pressure chamber is arranged in filtering and collecting the dust in the air, the realization filters and collects the piece dust in the air at the garbage collection in-process, prevent that the piece dust from piling up in the air, purification efficiency is improved. Through the negative pressure generation system that integrates on the garbage collection equipment, the garbage collection equipment passes through the negative pressure generation system and realizes that garbage collection in the garbage collection box, and the dust of garbage collection box filters and collects through the filtering component of negative pressure intracavity, and integrated negative pressure generation system realizes that occupation space is little, and the dust collection efficiency is high, reaches the purpose of high-efficient clearance and collection waste material and dust.
Description
Technical Field
The application relates to the technical field of waste collection, in particular to a negative pressure generating system and waste collection equipment.
Background
The processing (like utmost point ear cutting process) of current many products can produce waste material and dust piece usually, can collect the waste material that produces through setting up the collecting box among the prior art, however when the waste material falls into to the collecting box, the dust piece of attached to on the waste material floats in the air easily, is difficult to collect floating dust piece, leads to dust to pile up in the air easily and causes the potential safety hazard. And the waste collecting box that current a lot of mills used all does not have integrated negative pressure system, perhaps carries out waste material and dust collection through the unified negative pressure system of factory building, uses unified negative pressure system to cause pressure instability easily, leads to waste material and dust collection inefficiency.
SUMMERY OF THE UTILITY MODEL
In order to solve one of the above technical problems, the present application provides a negative pressure generating system and a waste collecting device, including a negative pressure cavity and a negative pressure generating assembly, wherein the negative pressure generating assembly is communicated with the negative pressure cavity and is used for enabling the negative pressure cavity to form negative pressure; the filter assembly is communicated with the negative pressure cavity and is used for filtering dust; the exhaust assembly is communicated with the negative pressure generating assembly. The filtering component is used for filtering and collecting suspended matters, dust and the like in the air, and then the suspended matters such as the scrap dust in the air are filtered and collected in the waste collection process through the negative pressure cavity, so that the scrap dust in the air is prevented from being accumulated, and the purification efficiency is improved.
Preferably, the negative pressure generating assembly comprises a negative pressure pipeline communicated with the negative pressure cavity and a negative pressure device used for generating negative pressure. And then the negative pressure cavity is internally in a negative pressure state, so that the external air communicated with the negative pressure cavity enters the negative pressure cavity.
Preferably, the filter assembly comprises at least one first filter member communicated with the negative pressure cavity, and an air blowing assembly arranged on the end face of the first filter member and used for blowing air towards the interior of the first filter member. The first filter member filters and collects dust debris in the air, and meanwhile, the air blowing assembly blows dust debris in the first filter member to the bottom.
Preferably, the air blowing assembly comprises pulse air blowing pieces respectively arranged on the first filter pieces and an air blowing pipe communicated with the pulse air blowing pieces. The pulse blows the piece and carries out the periodicity to first filtration piece inside and blow, and then blow the dust piece in the first filtration piece to the bottom.
Preferably, the exhaust assembly comprises an exhaust pipe connected with the negative pressure device, a second filter element connected to the exhaust end of the exhaust pipe, and a connecting plate for separating the second filter element and the negative pressure cavity. The second filters and separates through connecting plate and negative pressure chamber, filters gas through the second and discharges the external world again after filtering when blast pipe exhaust gas, further collects the dust in the air.
Preferably, the waste collecting device comprises the negative pressure generating system and a waste collecting box connected with the negative pressure generating system; the bottom of the waste collecting box body is connected with a waste compressing assembly. The waste material gets into behind the garbage collection box and carries out the compression discharge through waste material compression subassembly, and the dust of the inside suspension of garbage collection box filters and collects through negative pressure generation system, reaches the purpose of clearance collection waste material.
Preferably, the waste collecting box body is provided with an opening; the opening is communicated with the negative pressure cavity. And then make the inside negative pressure that forms of garbage collection box through the negative pressure, and then make the waste material get into in the garbage collection box.
Preferably, the compressing assembly comprises a waste compressing box connected to the bottom of the waste collecting box, and a driving assembly arranged on the waste compressing box. After the waste material falls into the waste material compression box body at the bottom of the waste material collection box body, the waste material can be compressed and conveyed through the driving structure of the motor screw.
Preferably, the waste collecting box is provided with a feeding port on the opposite side of the opening, and the feeding port is separated from the opening by a gas hole plate. Through can preventing that the waste material from getting into the negative pressure intracavity through the opening, ensure that the waste material is compressed in falling into the compression subassembly of garbage collection bottom of the box portion through the pan feeding mouth.
Preferably, the garbage collection box is wide from top to bottom and narrow from bottom to top, just the opening is located garbage collection box upper portion with the negative pressure chamber intercommunication, and then garbage collection box upper portion forms great negative pressure, does benefit to and collects the dust.
Compared with the prior art, the beneficial effects of this application are: this application is used for making the inside in negative pressure chamber continuously to keep the negative pressure through the negative pressure generation subassembly, and then make the outside air in intercommunication negative pressure chamber get into the negative pressure intracavity, generate the subassembly intercommunication at the negative pressure and have the exhaust subassembly that is used for exhaust gas, negative pressure chamber intercommunication has filtering component, filtering component is arranged in filtering and collecting the suspended solid in the air, and then realize filtering and collecting the suspended solid such as piece dust in the air at the garbage collection in-process through the negative pressure chamber, prevent that the piece dust from piling up in the air, and the purification efficiency is improved. Through the negative pressure generation system that integrates on the garbage collection equipment, the garbage collection equipment passes through the negative pressure generation system and realizes that garbage collection in the garbage collection box, and the dust of garbage collection box filters and collects through the filtering component of negative pressure intracavity, and it is little to realize occupation space through integrated negative pressure generation system, and the dust collection efficiency is high, reaches the purpose of high-efficient clearance and collection waste material and dust.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present application or the prior art will be briefly described below. It should be apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained by those skilled in the art without inventive exercise.
FIG. 1 is a front view of an embodiment of a negative pressure generating system and waste collection device;
FIG. 2 is a perspective view of the negative pressure generating system and waste collection device of the present application;
FIG. 3 is a schematic structural view of a negative pressure generating system and a waste collecting apparatus according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of an overall structure of a negative pressure generating system and a waste collecting device according to an embodiment of the present disclosure;
FIG. 5 is a cross-sectional view of an embodiment of the negative pressure generating system and waste collection device of the present application.
Reference numerals
10. A negative pressure generating assembly; 11. a negative pressure device; 12. a negative pressure pipeline; 20. a filter assembly; 21. a first filter member; 22. a blowing assembly; 221. an air blowing pipe; 222. a pulse air blowing member; 30. an exhaust assembly; 31. an exhaust pipe; 32. a second filter member; 33. a connecting plate; 40. a negative pressure chamber; 50. a waste collection box; 51. an opening; 52. a gas hole plate; 53. a feeding port; 60. a compression assembly; 61. a waste compression box; 62. a drive assembly.
Detailed Description
In the following description, numerous implementation details are set forth in order to provide a thorough understanding of the present invention. It should be understood, however, that these implementation details should not be used to limit the application. That is, in some embodiments of the present application, such practical details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
It should be noted that all the directional indications such as up, down, left, right, front and rear … … in the embodiment of the present application are only used to explain the relative positional relationship, movement, etc. between the components in a specific posture as shown in the drawings, and if the specific posture is changed, the directional indication is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in this application are for descriptive purposes only, not specifically referring to the order or sequence, nor are they intended to limit the application, but merely to distinguish components or operations described in the same technical terms, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
For further understanding of the contents, features and functions of the present invention, the following embodiments are exemplified in conjunction with the accompanying drawings and the following detailed description:
in order to solve the above technical problem, the present embodiment provides a negative pressure generating system, as shown in fig. 1, including a negative pressure chamber 40 and a negative pressure generating assembly 10 communicated with the negative pressure chamber 40, the negative pressure generating assembly 10 is used for keeping the inside of the negative pressure chamber 40 continuously at a negative pressure, so that the outside air communicated with the negative pressure chamber 40 enters the negative pressure chamber 40, the negative pressure generating assembly 10 is communicated with an exhaust assembly 30 for exhausting gas, the negative pressure chamber 40 is communicated with a filtering assembly 20, the filtering assembly 20 is used for filtering and collecting suspended matters in the air, so as to filter and collect suspended matters such as debris and dust in the air in the waste collection process through the negative pressure chamber 40, prevent the debris and dust in the air from accumulating, and improve the purification efficiency.
Specifically, in order to continuously maintain the negative pressure in the negative pressure chamber 40, the negative pressure generating assembly 10 includes a negative pressure conduit 12 communicating with the negative pressure chamber 40, and a negative pressure device 11 for generating the negative pressure. The negative pressure device 11 can be a negative pressure fan, the negative pressure fan is connected with the negative pressure pipeline 12, the negative pressure cavity 40 forms negative pressure through an air exhaust mode, the exhaust assembly 30 is connected with the negative pressure fan, then exhaust is carried out through the exhaust assembly 30, and then the negative pressure cavity 40 is internally formed into a negative pressure state, so that external air communicated with the negative pressure cavity 40 enters the negative pressure cavity 40.
Further, after the external air communicated with the negative pressure cavity 40 enters the negative pressure cavity 40, the air with the dust and the debris needs to be filtered, for this reason, the negative pressure cavity 40 is communicated with a filter assembly 20, and the filter assembly 20 comprises at least one first filter member 21 communicated with the negative pressure cavity 40 and an air blowing assembly 22 arranged on the end face of the first filter member 21 and used for blowing air towards the inside of the first filter member 21. Wherein, in order to improve filtration efficiency, first filtration piece 21 can set up a plurality of, and specific quantity is decided according to actual production, and first filtration piece 21 filters the collection with the piece dust in the air, and simultaneously, the subassembly 22 of blowing blows to the inside of first filtration piece 21, blows the dust piece in the first filtration piece 21 to the bottom. Wherein first filter part 21 can be dismantled and set up in negative pressure chamber 40, and the dust that piles up when being more in first filter part 21 can change first filter part 21, guarantees the filter effect.
Further, as shown in fig. 2, the blowing unit 22 includes pulse blowing members 222 respectively provided on the first filter members 21, and a blowing pipe 221 communicating with the pulse blowing members 222. A pulse blowing member 222 is provided on each of the first filter members 21, and the pulse blowing member 222 periodically blows air into the first filter members 21 to blow dust debris in the first filter members 21 to the bottom. The air blowing pipe 221 is communicated with each pulse air blowing piece 222, and further the pulse air blowing piece 222 passes through an air blowing source through the air blowing pipe 221, and the pulse air blowing piece 222 periodically blows air to the first filter member 21.
When the negative pressure generating assembly 10 continuously forms negative pressure in the negative pressure cavity 40 by means of air suction, the exhaust assembly 30 is connected with a negative pressure fan, and further exhausts air through the exhaust assembly 30, and the exhaust assembly 30 exhausts air in the negative pressure cavity 40 containing dust debris, for this reason, as shown in fig. 2-3, the exhaust assembly 30 comprises an exhaust pipe 31 connected with the negative pressure device 11, a second filter element 32 connected to the exhaust end of the exhaust pipe 31, and a connecting plate 33 for supporting the second filter element 32. The second filters piece 32 and cuts apart and set up at negative pressure chamber 40 top through connecting plate 33 and negative pressure chamber 40, and negative pressure ware 11 when bleeding negative pressure chamber 40, through blast pipe 31 exhaust gas, connects the second at the exhaust end of blast pipe 31 and filters piece 32, and the second filters piece 32 and is high-efficient filter, filters the external world of discharging again after gas through second filtration piece 32, further collects the dust in the air.
The embodiment also provides a waste collecting device, as shown in fig. 4, including the above-mentioned negative pressure generating system, and the waste collecting box 50 connected to the negative pressure generating system, the bottom of the waste collecting box 50 is connected with a waste compressing assembly 60, the negative pressure generating system makes the waste collecting box 50 form negative pressure inside, and then makes waste material enter the waste collecting box 50, the waste compressing assembly 60 is connected to the bottom of the waste collecting box 50, the waste material is compressed and discharged through the waste compressing assembly 60 after entering the waste collecting box 50, the dust suspended inside the waste collecting box 50 is filtered and collected through the negative pressure generating system, and the purpose of cleaning and collecting waste material is achieved.
Specifically, as shown in fig. 5, the waste collection box 50 has a structure with a wide top and a narrow bottom, an opening 51 is formed on a side surface of the waste collection box 50 close to the negative pressure generating system, the opening 51 is located on the upper portion of the waste collection box 50 and is communicated with the negative pressure chamber 40 of the negative pressure generating system, and then the negative pressure chamber 40 enables the waste collection box 50 to form negative pressure inside, which is beneficial to collecting dust. The opposite side of opening 51 of garbage collection box 50 has seted up pan feeding mouth 53, and the waste material passes through pan feeding mouth 53 and gets into in the garbage collection box 50, separates through porous plate 52 between pan feeding mouth 53 and the opening 51, through can preventing that the waste material from passing through opening 51 and getting into negative pressure chamber 40, ensures that the waste material falls into the compression subassembly 60 of garbage collection box 50 bottom and compresses, and the dust of garbage collection box 50 filters and collects through the filter assembly 20 in the negative pressure chamber 40.
Further, the compressing assembly 60 includes a waste compressing box 61 connected to the bottom of the waste collecting box 50, and a driving assembly 62 provided to the waste compressing box 61. The driving assembly 62 may be a motor, and the waste is compressed and transferred by a screw structure of the motor after falling into the waste compressing box 61 at the bottom of the waste collecting box 50.
To sum up, in this application one or more embodiments, the inside that is used for making the negative pressure chamber through the negative pressure generation subassembly of this application continuously keeps the negative pressure, and then make the outside air entering negative pressure intracavity in intercommunication negative pressure chamber, generate the subassembly intercommunication at the negative pressure and have the exhaust subassembly that is used for exhaust gas, negative pressure chamber intercommunication has filter assembly, filter assembly is arranged in filtering and collecting the suspended solid in the air, and then realize filtering and collecting the suspended solid such as the piece dust in the air at the garbage collection in-process through the negative pressure chamber, prevent that the piece dust from piling up in the air, improve purification efficiency. Through the negative pressure generation system that integrates on the garbage collection equipment, the garbage collection equipment passes through the negative pressure generation system and realizes that garbage collection in the garbage collection box, and the dust of garbage collection box filters and collects through the filtering component of negative pressure intracavity, and it is little to realize occupation space through integrated negative pressure generation system, and the dust collection efficiency is high, reaches the purpose of high-efficient clearance and collection waste material and dust.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (10)
1. A negative pressure generating system characterized by: comprises a negative pressure chamber (40) and
the negative pressure generating assembly (10), the negative pressure generating assembly (10) is communicated with the negative pressure cavity (40) and is used for enabling the negative pressure cavity (40) to form negative pressure;
the filter assembly (20), the filter assembly (20) is communicated with the negative pressure cavity (40) and is used for filtering dust;
an exhaust assembly (30), wherein the exhaust assembly (30) is communicated with the negative pressure generating assembly (10).
2. The negative pressure generating system according to claim 1, characterized in that: the negative pressure generating assembly (10) comprises a negative pressure pipeline (12) communicated with the negative pressure cavity (40) and a negative pressure device (11) used for generating negative pressure.
3. The negative pressure generating system according to claim 1, characterized in that: the filtering assembly (20) comprises at least one first filtering piece (21) communicated with the negative pressure cavity (40) and an air blowing assembly (22) arranged on the end face of the first filtering piece (21) and used for blowing air towards the interior of the first filtering piece (21).
4. The negative pressure generating system according to claim 3, wherein: the air blowing assembly (22) comprises pulse air blowing pieces (222) respectively arranged on the first filter pieces (21) and air blowing pipes (221) communicated with the pulse air blowing pieces (222).
5. The negative pressure generating system according to claim 1, characterized in that: the exhaust assembly (30) comprises an exhaust pipe (31) connected with the negative pressure generating assembly (10), a second filter member (32) connected with the exhaust pipe (31), and a connecting plate (33) used for separating the second filter member (32) and the negative pressure cavity (40).
6. A waste collection device, characterized by: comprising a negative pressure generating system according to any of claims 1-5, and a waste collection tank (50) connected to the negative pressure generating system; the bottom of the waste collecting box body (50) is connected with a waste compressing component (60).
7. The waste collection device of claim 6, further comprising: an opening (51) is formed on the waste collecting box body (50); the opening (51) is communicated with the negative pressure cavity (40).
8. The waste collection device of claim 6, further comprising: the compressing assembly (60) comprises a waste compressing box body (61) connected to the bottom of the waste collecting box body (50) and a driving assembly (62) arranged on the waste compressing box body (61).
9. The waste collection device of claim 7, further comprising: the waste collecting box body (50) is provided with a feeding port (53) on the opposite side of the opening (51), and the feeding port (53) is separated from the opening (51) through an air hole plate (52).
10. The waste collection device of claim 9, further comprising: the waste collecting box body (50) is wide at the top and narrow at the bottom, and the opening (51) is positioned at the upper part of the waste collecting box body (50) and communicated with the negative pressure cavity (40).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121703415.7U CN215585791U (en) | 2021-07-26 | 2021-07-26 | Negative pressure generating system and waste collecting equipment |
| PCT/CN2022/107597 WO2023005868A1 (en) | 2021-07-26 | 2022-07-25 | Negative pressure generation system and waste collection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121703415.7U CN215585791U (en) | 2021-07-26 | 2021-07-26 | Negative pressure generating system and waste collecting equipment |
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| Publication Number | Publication Date |
|---|---|
| CN215585791U true CN215585791U (en) | 2022-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121703415.7U Active CN215585791U (en) | 2021-07-26 | 2021-07-26 | Negative pressure generating system and waste collecting equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN215585791U (en) |
| WO (1) | WO2023005868A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023005868A1 (en) * | 2021-07-26 | 2023-02-02 | 广东利元亨智能装备股份有限公司 | Negative pressure generation system and waste collection device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1322911C (en) * | 2005-06-29 | 2007-06-27 | 浙江盾安人工环境设备股份有限公司 | Dust separation compactor |
| CN102641631B (en) * | 2012-04-12 | 2014-08-27 | 江苏精亚环境科技有限公司 | Self-cleaning dust collection device |
| CN203304261U (en) * | 2013-05-10 | 2013-11-27 | 上海御流包装机械有限公司 | Negative-pressure waste sucking and discharging device of sealing machine |
| DE102014005177A1 (en) * | 2014-04-09 | 2015-10-15 | Stephan Rottler | Filter system for the filtration of, in particular contaminated, air dusts and methods for filtering |
| CN207076242U (en) * | 2017-05-15 | 2018-03-09 | 成都秉德科技有限公司 | A kind of environmentally friendly dust-filtering case |
| CN210410308U (en) * | 2019-06-12 | 2020-04-28 | 上海尚容电子科技有限公司 | Dispensing barrel with dust collector |
| CN211384253U (en) * | 2019-10-30 | 2020-09-01 | 周楠 | Dust filtering and recycling device for furniture factory |
| CN213255042U (en) * | 2020-08-06 | 2021-05-25 | 济南利民路桥工程有限责任公司 | Hydraulic pressure quartering hammer is with supplementary dust device |
| CN215585791U (en) * | 2021-07-26 | 2022-01-21 | 广东利元亨智能装备股份有限公司 | Negative pressure generating system and waste collecting equipment |
-
2021
- 2021-07-26 CN CN202121703415.7U patent/CN215585791U/en active Active
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2022
- 2022-07-25 WO PCT/CN2022/107597 patent/WO2023005868A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023005868A1 (en) * | 2021-07-26 | 2023-02-02 | 广东利元亨智能装备股份有限公司 | Negative pressure generation system and waste collection device |
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| Publication number | Publication date |
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| WO2023005868A1 (en) | 2023-02-02 |
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