CN209244775U - A kind of accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor - Google Patents

A kind of accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor Download PDF

Info

Publication number
CN209244775U
CN209244775U CN201821842049.1U CN201821842049U CN209244775U CN 209244775 U CN209244775 U CN 209244775U CN 201821842049 U CN201821842049 U CN 201821842049U CN 209244775 U CN209244775 U CN 209244775U
Authority
CN
China
Prior art keywords
air
air inlet
air compressor
reciprocating
energy saving
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.)
Active
Application number
CN201821842049.1U
Other languages
Chinese (zh)
Inventor
孙海燕
梁恒静
李征
朱茂勇
管建国
陈国方
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Continues Your Machinery Co Ltd
Original Assignee
Nanjing Continues Your Machinery Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nanjing Continues Your Machinery Co Ltd filed Critical Nanjing Continues Your Machinery Co Ltd
Priority to CN201821842049.1U priority Critical patent/CN209244775U/en
Application granted granted Critical
Publication of CN209244775U publication Critical patent/CN209244775U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Compressor (AREA)

Abstract

A kind of accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor, belong to Compressor Technology field, including air compressor, air inlet tank, air intake filter, intake solenoid valve, check valve, air filter, check-valves, blowoff electromagnetic valve, pressure switch and exhaust canister;Air intake filter is equipped with air inlet, and exhaust canister is equipped with exhaust outlet.When the utility model air consumption is less than capacity, air compressor machine sends signals to control cabinet by the pressure switch installed on exhaust canister, intake solenoid valve after closing air intake filter, stop air inlet in time, the blowoff electromagnetic valve before check-valves is opened simultaneously, air compressor enters zero load idle running, reduces energy consumption.When subsequent air compressor machine idle running, air inlet tank, by air filter, the micro air inlet of check valve, has prevented air inlet vacuum, has reduced noise from the external world.This system structure is simple, movement is accurate and reliable, low noise, and energy conservation and environment protecting are extremely significant.

Description

A kind of accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor
Technical field
The utility model belongs to Compressor Technology field, and in particular, to a kind of reciprocating-piston booster air compressor Accurate Energy Saving Control gas handling system.
Background technique
Booster air compressor is a kind of driven fluid machinery that low-pressure air is promoted to pressure-air, is that compression is empty The heart of gas system.It is operated after compressing with piston to it from the compressed air of air intake duct sucking low pressure by motor, To the compressed air of exhaust pipe discharge high pressure, to use the every profession and trade each department of high pressure air to service.
The air consumption of user demand may be variation;When air consumption is less than compressor air-discharging amount, just need to compressor The amount of being exhausted is adjusted, so that the capacity of compressor adapts to the requirement of air consumption.Compressor is only vented and is not vented two kinds The regulative mode of working condition is most economical, simple, reliable, and this patent is close to such case;This patent passes through automatic, accurate control Air inlet meets requirement of the user to gas consumption, while having saved the energy.
Utility model content
Purpose of utility model: the purpose of the utility model is to provide a kind of the accurate of reciprocating-piston booster air compressor Energy Saving Control gas handling system solves the problems, such as that compressor can flexibly carry out air inlet adjustment according to air consumption.
Technical solution: the utility model provide the accurate Energy Saving Control of reciprocating-piston booster air compressor a kind of into Gas system, including air compressor, air inlet tank, air intake filter, intake solenoid valve, check valve, air filter, check-valves, Blowoff electromagnetic valve, pressure switch and exhaust canister, the air inlet tank be equipped with one group of first air inlet pipe, the one of first air inlet pipe End is connect with air inlet tank, and the air inlet of the other end of the first air inlet pipe and air compressor cylinder connects, the air inlet tank Left and right ends be respectively set the first air inlet and the second air inlet, first air inlet is equipped with intake solenoid valve, described Second air inlet is equipped with check valve, and the air intake filter is connect by intake solenoid valve with air inlet tank, the air filtration Device is connect by check valve with air inlet tank, and air filter is communicated with atmosphere, the air intake filter equipped with third into Port, the exhaust canister is connect with air compressor compressed air nominal outlet port end, between the exhaust canister and air compressor Equipped with check-valves, the check-valves is equipped with blowoff electromagnetic valve, and the exhaust canister is equipped with pressure switch, sets on the exhaust canister There is exhaust outlet.The accurate Energy Saving Control gas handling system of the reciprocating-piston booster air compressor of the utility model, air consumption are small When capacity, air compressor machine sends signals to control cabinet by the pressure switch installed on exhaust canister, after closing air intake filter Intake solenoid valve stops air inlet in time, while the blowoff electromagnetic valve of check-valves upper forepart is opened, and air compressor enters zero load Idle running reduces energy consumption.When subsequent air compressor machine idle running, air inlet tank, by air filter, the micro air inlet of check valve, prevents from the external world Air inlet vacuum, reduces noise.This system structure is simple, movement is accurate and reliable, low noise, energy conservation and environment protecting pole It is significant.
Further, the accurate Energy Saving Control gas handling system of above-mentioned reciprocating-piston booster air compressor, it is described into Gas tank is equipped with first pressure gauge.Be arranged on air inlet tank pressure gauge can air pressure in real-time monitoring air inlet tank, keep air inlet System is stablized.
Further, the accurate Energy Saving Control gas handling system of above-mentioned reciprocating-piston booster air compressor, the sky The crankcase cover of air compressor is equipped with mounting plate, and the mounting plate is equipped with two parallel U-shaped fixed rings, the air inlet tank It is fixed on a mounting board by U-shaped fixed ring.The fixation that air inlet tank is carried out by mounting plate and U-shaped fixed ring, firmly installs, if It is simple to count structure, it is easy to use.
Further, the accurate Energy Saving Control gas handling system of above-mentioned reciprocating-piston booster air compressor, described The number of one air inlet pipe may be configured as 2 or 3.According to the quantity of air compressor cylinder air inlet, rationally setting first into The number of tracheae.
Further, the accurate Energy Saving Control gas handling system of above-mentioned reciprocating-piston booster air compressor, it is described into Gas tank is equipped with safety valve, and the test side of the safety valve is arranged in air inlet tank.The safety valve of setting improves air inlet tank Safety, can in air inlet tank gas pressure be more than load rated safety value when, open the safety-valve in time, avoid causing danger.
Further, the accurate Energy Saving Control gas handling system of above-mentioned reciprocating-piston booster air compressor, it is described into Gas tank and exhaust canister are cylindrical tube structure.What is be arranged columnar structured, good appearance, it is easy to process.
Further, the accurate Energy Saving Control gas handling system of above-mentioned reciprocating-piston booster air compressor, the row Gas tank is bolted on the pedestal of air compressor.
Further, the accurate Energy Saving Control gas handling system of above-mentioned reciprocating-piston booster air compressor, the row Gas tank is equipped with second pressure gauge.The pressure gauge of setting can monitor the air pressure in exhaust canister.
Further, the accurate Energy Saving Control gas handling system of above-mentioned reciprocating-piston booster air compressor, it is described into Air filter is oil removal filter.The efficient degreasing filter of setting can separate water, the fluid oil in compressed air, And the dust and impurities in air are filtered off, the air-breathing quality of pressurization air compressor machine is effectively controlled, so that the exhaust of air compressor machine Oil content substantially reduces.
Further, the accurate Energy Saving Control gas handling system of above-mentioned reciprocating-piston booster air compressor, the row Gas tank is equipped with support base, and the support base includes the first support plate, the second support plate, pinboard and fixed mounting plate, described Pinboard is arc, and the radian of pinboard is identical as the exhaust radian of tank wall, and the pinboard is fixed on exhaust canister On outer wall, first support plate and the second support plate are vertically arranged on the lower end surface of pinboard, and the first support plate and The lower end of second support plate is fixed in fixed mounting plate, and the fixed mounting plate is bolted on air compressor On pedestal.Quickly exhaust canister can be fixed on the pedestal of air compressor by support base.
Above-mentioned technical proposal can be seen that the utility model has the following beneficial effects: described in the utility model reciprocal The accurate Energy Saving Control gas handling system of piston type booster air compressor, it is reasonable in design, it is easy to use, using concentrate into The air inlet of air compressor is connected to air inlet tank, passes through the solenoid valve of air inlet tank front-end configuration, oil removal filter by gas It is connected to compressed air system air inlet;Air compressor machine sends signals to control cabinet by the pressure switch installed on exhaust canister, Intake solenoid valve after controlling filter, so that air consumption stops air inlet, while the blowdown of check-valves upper forepart when declining in time Solenoid valve is opened, and air compressor machine enters zero load idle running, and energy-saving effect is significant, and when subsequent air compressor machine dallies, air inlet tank is logical from the external world The micro air inlet of air filter, check valve is crossed, has prevented air inlet vacuum, has reduced noise, extends air compressor machine service life, together When energy conservation and environmental protection, compressor air-discharging oil content is greatly reduced, and adjusts operating condition good economy performance, that is, unit capacity wasted work when adjusting Want small, regulating system structure is simple, securely and reliably, and operates easy to maintenance, has great popularization value.
Detailed description of the invention
Fig. 1 is the knot of the accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor described in the utility model Structure schematic diagram;
Fig. 2 is a left side for the accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor described in the utility model View.
In figure: air compressor 1, mounting plate 11, U-shaped fixed ring 12, air inlet tank 2, the first air inlet pipe 21, the first air inlet 22, the second air inlet 23, first pressure gauge 24, safety valve 25, air intake filter 3, third air inlet 31, intake solenoid valve 4, list To valve 5, air filter 6, check-valves 7, blowoff electromagnetic valve 8, pressure switch 9, exhaust canister 10, exhaust outlet 101, support base 102, First support plate 1021, the second support plate 1022, pinboard 1023, fixed mounting plate 1024, second pressure gauge 103.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model Limitation.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", " up time The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of Describe the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, It is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, the meaning of " multiple " It is two or more, unless otherwise restricted clearly.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected;It can To be mechanical connection, it is also possible to be electrically connected;It can be directly connected, can also can be indirectly connected through an intermediary Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be Concrete meaning in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it "lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above " One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special Sign is directly below and diagonally below the second feature including fisrt feature under the second feature " below ", " below " and " below ", or only Indicate that first feature horizontal height is less than second feature.
Embodiment one
The accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor as shown in Figure 1, including air pressure Contracting machine 1, air inlet tank 2, air intake filter 3, intake solenoid valve 4, check valve 5, air filter 6, check-valves 7, blowoff electromagnetic valve 8, pressure switch 9 and exhaust canister 10, the air inlet tank 2 be equipped with one group of first air inlet pipe 21, the one of first air inlet pipe 21 End is connect with air inlet tank 2, and the other end of the first air inlet pipe 21 is connect with the air inlet of 1 cylinder of air compressor, it is described into The first air inlet 22 and the second air inlet 23 is respectively set in the left and right ends of gas tank 2, and first air inlet 22 is equipped with air inlet Solenoid valve 4, second air inlet 23 are equipped with check valve 5, and the air intake filter 3 passes through intake solenoid valve 4 and air inlet tank 2 Connection, the air filter 6 is connect by check valve 5 with air inlet tank 2, and air filter 6 is communicated with atmosphere, it is described into Air filter 3 is equipped with third air inlet 31, and the exhaust canister 10 is connect with 1 compressed air nominal outlet port end of air compressor, Check-valves 7 is equipped between the exhaust canister 10 and air compressor 1, the check-valves 7 is equipped with blowoff electromagnetic valve 8, the row Gas tank 10 is equipped with pressure switch 9, and before blowoff electromagnetic valve 8 is located at check-valves 7, the exhaust canister 10 is equipped with exhaust outlet 101.Into Gas tank 2 is equipped with first pressure gauge 24.Air inlet tank 2 is equipped with safety valve 25, and the test side of the safety valve 25 is arranged in air inlet In tank 2.The crankcase cover of air compressor 1 is equipped with mounting plate 11, and the mounting plate 11 is equipped with two parallel U-shaped fixations Ring 12, the air inlet tank 2 are fixed on mounting plate 11 by U-shaped fixed ring 12.The number of first air inlet pipe 21 may be configured as 2 Or 3.Air inlet tank 2 and exhaust canister 10 are cylindrical tube structure.Exhaust canister 10 is bolted on the bottom of air compressor 1 On seat.Exhaust canister 10 is equipped with second pressure gauge 103.Air intake filter 3 is oil removal filter.
Embodiment two
The accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor as shown in Figure 1, 2, including air Compressor 1, air inlet tank 2, air intake filter 3, intake solenoid valve 4, check valve 5, air filter 6, check-valves 7, blowdown electromagnetism Valve 8, pressure switch 9 and exhaust canister 10, the air inlet tank 2 are equipped with one group of first air inlet pipe 21, first air inlet pipe 21 One end is connect with air inlet tank 2, and the other end of the first air inlet pipe 21 is connect with the air inlet of 1 cylinder of air compressor, described The left and right ends of air inlet tank 2 are respectively set the first air inlet 22 and the second air inlet 23, first air inlet 22 be equipped with into Pneumoelectric magnet valve 4, second air inlet 23 are equipped with check valve 5, and the air intake filter 3 passes through intake solenoid valve 4 and air inlet Tank 2 connects, and the air filter 6 is connect by check valve 5 with air inlet tank 2, and air filter 6 is communicated with atmosphere, institute Air intake filter 3 is stated equipped with third air inlet 31, the exhaust canister 10 connects with 1 compressed air nominal outlet port end of air compressor It connects, check-valves 7 is equipped between the exhaust canister 10 and air compressor 1, the check-valves 7 is equipped with blowoff electromagnetic valve 8, described Exhaust canister 10 is equipped with pressure switch 9, and before blowoff electromagnetic valve 8 is located at check-valves 7, the exhaust canister 10 is equipped with exhaust outlet 101. Air inlet tank 2 is equipped with first pressure gauge 24.Air inlet tank 2 be equipped with safety valve 25, the safety valve 25 test side setting into In gas tank 2.The crankcase cover of air compressor 1 is equipped with mounting plate 11, the mounting plate 11 be equipped with two it is parallel U-shaped solid Determine ring 12, the air inlet tank 2 is fixed on mounting plate 11 by U-shaped fixed ring 12.The number of first air inlet pipe 21 may be configured as 2 It is a or 3.Air inlet tank 2 and exhaust canister 10 are cylindrical tube structure.Exhaust canister 10 is equipped with second pressure gauge 103.Air inlet Filter 3 is oil removal filter.
It is fixed for the ease of the installation of tank 10 is exhausted, exhaust canister 10 is equipped with support base 102, the support base 102 Including the first support plate 1021, the second support plate 1022, pinboard 1023 and fixed mounting plate 1024, the pinboard 1023 is Arc, and the radian of pinboard 1023 is identical as the radian of 10 outer wall of exhaust canister, and the pinboard 1023 is fixed on exhaust canister On 10 outer wall, first support plate 1021 and the second support plate 1022 are vertically arranged on the lower end surface of pinboard 1023, And the lower end of the first support plate 1021 and the second support plate 1022 is fixed in fixed mounting plate 1024, fixed mounting plate 1024 are bolted on the pedestal of air compressor 1.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art For art personnel, without departing from the principle of this utility model, several improvement can also be made, these improvement also should be regarded as The protection scope of the utility model.

Claims (10)

1. a kind of accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor, it is characterised in that: including air Compressor (1), air inlet tank (2), air intake filter (3), intake solenoid valve (4), check valve (5), air filter (6), non-return Valve (7), blowoff electromagnetic valve (8), pressure switch (9) and exhaust canister (10), the air inlet tank (2) are equipped with one group of first air inlet pipe (21), one end of first air inlet pipe (21) is connect with air inlet tank (2), and the other end and air of the first air inlet pipe (21) The air inlet of compressor (1) cylinder connects, and the first air inlet (22) and second is respectively set in the left and right ends of the air inlet tank (2) Air inlet (23), first air inlet (22) are equipped with intake solenoid valve (4), and second air inlet (23) is equipped with unidirectional Valve (5), the air intake filter (3) are connect by intake solenoid valve (4) with air inlet tank (2), and the air filter (6) passes through Check valve (5) is connect with air inlet tank (2), and air filter (6) is communicated with atmosphere, and the air intake filter (3) is equipped with Third air inlet (31), the exhaust canister (10) connect with air compressor (1) compressed air nominal outlet port end, the exhaust canister (10) check-valves (7) are equipped between air compressor (1), the check-valves (7) is equipped with blowoff electromagnetic valve (8), the row Gas tank (10) is equipped with pressure switch (9), and the exhaust canister (10) is equipped with exhaust outlet (101).
2. the accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor according to claim 1, special Sign is: the air inlet tank (2) is equipped with first pressure gauge (24).
3. the accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor according to claim 1, special Sign is: the crankcase cover of the air compressor (1) is equipped with mounting plate (11), and the mounting plate (11) is equipped with two and puts down Capable U-shaped fixed ring (12), the air inlet tank (2) are fixed on mounting plate (11) by U-shaped fixed ring (12).
4. the accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor according to claim 1, special Sign is: the number of first air inlet pipe (21) may be configured as 2 or 3.
5. the accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor according to claim 1, special Sign is: the air inlet tank (2) is equipped with safety valve (25), and the test side setting of the safety valve (25) is in air inlet tank (2).
6. the accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor according to claim 1, special Sign is: the air inlet tank (2) and exhaust canister (10) are cylindrical tube structure.
7. the accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor according to claim 1, special Sign is: the exhaust canister (10) is bolted on the pedestal of air compressor (1).
8. the accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor according to claim 1, special Sign is: the exhaust canister (10) is equipped with second pressure gauge (103).
9. the accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor according to claim 1, special Sign is: the air intake filter (3) is oil removal filter.
10. the accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor according to claim 1, special Sign is: the exhaust canister (10) is equipped with support base (102), and the support base (102) includes the first support plate (1021), the Two support plates (1022), pinboard (1023) and fixed mounting plate (1024), the pinboard (1023) is arc, and is transferred The radian of plate (1023) is identical as the radian of exhaust canister (10) outer wall, and the pinboard (1023) is fixed on the outer of exhaust canister (10) On wall, first support plate (1021) and the second support plate (1022) are vertically arranged on the lower end surface of pinboard (1023), And the lower end of the first support plate (1021) and the second support plate (1022) is fixed on fixed mounting plate (1024), described solid Dingan County's loading board (1024) is bolted on the pedestal of air compressor (1).
CN201821842049.1U 2018-11-09 2018-11-09 A kind of accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor Active CN209244775U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821842049.1U CN209244775U (en) 2018-11-09 2018-11-09 A kind of accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821842049.1U CN209244775U (en) 2018-11-09 2018-11-09 A kind of accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor

Publications (1)

Publication Number Publication Date
CN209244775U true CN209244775U (en) 2019-08-13

Family

ID=67527678

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821842049.1U Active CN209244775U (en) 2018-11-09 2018-11-09 A kind of accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor

Country Status (1)

Country Link
CN (1) CN209244775U (en)

Similar Documents

Publication Publication Date Title
CN202986059U (en) Extruder oligomer waste gas treatment device for polystyrene sheets
CN101514703B (en) Idling-free unloading energy saving screw type air compressor
CN209244775U (en) A kind of accurate Energy Saving Control gas handling system of reciprocating-piston booster air compressor
CN113669179B (en) Electric pump integrated fuel filter base assembly capable of automatically exhausting
CN109209851A (en) A kind of compressor operation control device
CN201235256Y (en) High-efficiency self-cleaning air filter
KR101341653B1 (en) Air compressor having suction afunction
CN213016699U (en) Air suction valve plate and valve plate exhaust structure for refrigerator compressor
CN213513210U (en) Buffer tube of regulator for environmental protection equipment
CN110966192A (en) Water-lubricated propylene gas single-screw compressor for petrochemical industry
CN209163975U (en) A kind of screen system of the umbrella-shaped structure of electric fuel punp
CN209892412U (en) Multi-air-compressor combined air supply management system
CN210003580U (en) hydraulic power device for aircraft engine maintenance
CN210637171U (en) Filter base
CN211692745U (en) Vacuum suction pump with filtering capability
CN2813921Y (en) Air compressor combination load-reducing sound silencer
CN219482016U (en) Dangerous gas collector of medicament storage box
CN210135042U (en) Universal plug type balance ultra-silent gas-liquid dual-purpose pump
CN204419409U (en) A kind of air filter for engines of fast replacing filter core
CN213920682U (en) Portable oil-free auxiliary air compressor station
CN215762492U (en) Constant pressure hydraulic oil tank
CN218511221U (en) Improved double-machine double-stage screw refrigerating compressor unit
CN214944657U (en) Air compressor machine diesel oil filtration system
CN209294042U (en) A kind of oil-free scroll air compressor machine
CN211852111U (en) Air filter with double-filtering structure

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant