CN217685679U - Water mist generating device, hydrated negative oxygen ion generator and air purifier - Google Patents

Abstract

The utility model relates to a water mist generating device, a hydrated negative oxygen ion generator and an air purifier, wherein the water mist generating device comprises a base; a mounting base; an atomizing sheet; the base is provided with a through hole capable of communicating the cavity and the installation cavity, the base is provided with a first positioning portion, the installation seat is provided with a second positioning portion, and the installation seat can rotate around the axis of the through hole to a first state where the first positioning portion is connected with the second positioning portion and a second state where the first positioning portion is separated from the second positioning portion. Through rotatory mount pad, can realize the dismouting of mount pad and connecting seat, for the mode of screw connection, it is comparatively convenient to first location portion sets up on the base, and second location portion sets up on the mount pad, can not lose yet.

Description

Water mist generating device, hydrated negative oxygen ion generator and air purifier

Technical Field

The utility model relates to an air purification technical field, concretely relates to water smoke generating device and hydrated negative oxygen ion generator, air purifier.

Background

As society develops and environments become polluted, air cleaners are becoming more familiar, and in general, air cleaners absorb polluted ambient air, purify the absorbed air, and discharge clean air to the outside, thereby purifying air in the area around the air cleaners. Negative ions (negative oxygen ions) are gas ions with negative charges in the air, and according to the regulations of the world health organization, when the concentration of the negative oxygen ions in the air is not less than 1000-1500 per cubic centimeter, the air is regarded as fresh air. Therefore, the module capable of generating negative oxygen ions is arranged in the air purifier, so that the air purification effect is improved. As shown in the water mist generating device and the hydrated negative oxygen ion generator and the air purifier disclosed in the Chinese utility model patent with the patent number of CN202021026130.X (with the publication number of CN 213237821U), the water mist generating device and the hydrated negative oxygen ion generator using the device disclosed in the Chinese utility model patent with the patent number of CN202021025461.1 (with the publication number of CN 213996496U), the water mist generating device comprises a base and a negative ion needle, wherein the inside of the base is hollow to form an ion generating cavity, the negative ion needle is arranged in the ion generating cavity, the water mist generating device is arranged below the base, and an output port is communicated with the ion generating cavity.

Due to the technical limitation at present, the atomizing plate of the water mist generating device has the service life of only 3000 to 5000 hours. The base and the water mist generating device are usually fixed by three screws, so that a user is troublesome to replace the water mist generating device by himself or herself, and the problem that the water mist generating device cannot be installed due to the fact that the screws are small in size and the fixing screws are lost exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem to the current situation of prior art, a water smoke generating device convenient to subassembly dismouting takes place for water smoke is provided.

The second technical problem to be solved by the present invention is to provide a hydrated negative oxygen ion generator using the above water mist generator.

The third technical problem to be solved by the utility model is to provide an air purifier using the above hydrated negative oxygen ion generator to the current situation of the prior art.

The utility model provides a technical scheme that above-mentioned first technical problem adopted does: a water mist generating device comprises

A base having a hollow chamber therein;

the water mist generating assembly comprises

The mounting seat can be connected with the base, and a mounting cavity which can be in fluid communication with the cavity of the base is formed in the mounting seat;

the atomizing sheet is arranged in the mounting cavity;

the method is characterized in that: the base is provided with a through hole capable of communicating the cavity and the mounting cavity, the base is provided with a first positioning portion, the mounting seat is provided with a second positioning portion, and the mounting seat can rotate to a first state that the first positioning portion is connected with the second positioning portion and a second state that the first positioning portion is separated from the second positioning portion around the axis of the through hole.

In order to facilitate communication between the installation cavity of the installation seat and the cavity of the base, the installation seat partially extends into the cavity of the base from the through hole, one port of the installation cavity penetrates through the installation seat and is located in the cavity, the first positioning portion is arranged outside the cavity of the base and is located at the periphery of the through hole, and the second positioning portion is arranged on the peripheral wall of the installation seat. Therefore, the installation cavity is directly communicated with the cavity, other transition parts are not needed for realizing communication, and related parts are few.

In order to improve the assembly stability of the mounting seat and the base, the first positioning portions are at least two and are arranged at intervals along the circumferential direction of the through hole of the base, and the second positioning portions are at least two and are arranged at intervals along the circumferential direction of the mounting seat. Therefore, the mounting seat is connected with the base in multiple points, and the connection firmness is good.

The structure is simple, the first positioning part is provided with a positioning groove, the positioning groove and the second positioning part can be positioned on the same circumference which takes the axis of the through hole as the central line, and the positioning groove can be used for accommodating the second positioning part; or the second positioning part is provided with a positioning groove, the positioning groove and the first positioning part can be positioned on the same circumference which takes the axis of the through hole as the central line, and the positioning groove can be used for accommodating the first positioning part. The second positioning part is positioned in or separated from the accommodating groove of the first positioning part by rotating the mounting seat, so that the water mist generating assembly is conveniently disassembled; when the second positioning part enters the positioning groove and abuts against the positioning groove, the mounting seat cannot rotate continuously, and a user is prompted to mount the positioning seat in place when feeling the rotation resistance; and the impact of the second positioning part and the positioning groove can make a sound to prompt a user to assemble the positioning groove in place.

In order to prevent the second positioning part from being separated from the positioning groove under the action of non-external force, the water mist generation assembly is separated from the base, the mounting seat is located below the base and located below the base, a first convex part is arranged at the bottom of the second positioning part, and a second convex part which can be located on the outer side of the first convex part and is abutted to the first convex part is convexly arranged at the position, close to the notch, of the bottom wall of the positioning groove. The second convex part stops the first convex part to limit the second positioning part, and if no external force is applied to the second positioning part, the second positioning part cannot easily pass through the second convex part to be separated from the positioning groove.

In order to facilitate the rotation of the mounting seat, at least two ribs are arranged on the peripheral wall of the mounting seat at intervals along the axial direction of the mounting seat, and each rib extends along the direction far away from the base. The rib is convenient for be used for the application of force on the mount pad, otherwise if the mount pad outside is the smooth surface, when being used for the application of force on the mount pad, the hand skidded easily.

The utility model provides a technical scheme that above-mentioned second technical problem adopted does: a hydrated negative oxygen ion generator applying the water mist generating device is characterized in that: and a negative ion generating assembly is arranged in the cavity of the base.

In order to electrify the atomizing sheet and the negative ion generating assembly to work and reduce the use of wires, a first circuit board for controlling the atomizing sheet to work or not is embedded in the mounting seat, and an opening for exposing a connecting contact on the first circuit board is formed in the mounting seat; the negative ion generating assembly comprises a negative ion needle, a second circuit board which is positioned outside the cavity and used for controlling the negative ion needle to work or not is arranged in the base, an electric connecting column which extends towards an opening in the mounting seat is arranged on the second circuit board, and the electric connecting column is inserted into the opening to be contacted with a connecting contact on the first circuit board in a state that the mounting seat is connected with the base. Offer the opening that supplies the connection contact of first circuit board to expose on the mount pad surface, be convenient for pass through the contact with its second circuit board of control anion needle work and realize the electricity and be connected, reduced the use of wire, be convenient for connect and the fault rate is low.

The electrical connection post can have a variety of configurations, and preferably comprises

A post having one end mounted on the second circuit, the post extending toward the connection contact of the first circuit board;

the feeler lever is connected with the other end of the column body and can move along the axial direction of the column body;

and the elastic piece acts on the contact rod to enable the contact rod to always keep a trend of moving towards the connecting contact of the first circuit board. The elastic component application of force is on the feeler lever, and one makes feeler lever and first circuit board in close contact with, has not only guaranteed to realize the electricity between first circuit board and the second circuit board and has connected, and two make the mount pad install the back on the base, second location portion also can tightly support on the diapire of constant head tank under the effect of elastic component elasticity for second location portion is difficult to deviate from in the constant head tank, has improved the firm in connection nature of water smoke emergence subassembly and base.

In order to improve the assembling stability of the mounting seat and the base, the first positioning parts are at least two and are arranged at intervals which are not uniform along the circumferential direction of the through hole of the base, and the second positioning parts are at least two and are arranged at intervals which are not uniform along the circumferential direction of the mounting seat. Therefore, the mounting seat is connected with the base through multiple points, and the connection firmness is good; the inhomogeneous setting is in order to prevent that the user from the dislocation set when using, lead to the feeler lever not with the contact connection of first circuit board, because second location portion and first location portion have a plurality ofly, if evenly distributed, then a second location portion inserts from a plurality of positions and can both with the cooperation of a first location portion, but like this, the feeler lever can misplace with the contact connection of first circuit board, the event sets second location portion and first location portion into the form of non-equipartition, every second location portion all only a position can insert, just can guarantee all second location portions and first location portion one-to-one, and under this condition, when mount pad and pedestal connection were accomplished, the feeler lever also contacts with the contact connection of first circuit board.

The utility model provides a technical scheme that above-mentioned third technical problem adopted does: an air purifier who uses above-mentioned hydrated negative oxygen ion generator which characterized in that: the device comprises a shell, wherein the shell is provided with an inner cavity, an air inlet and an air outlet which are communicated with the inner cavity are formed in the shell, the hydrated negative oxygen ion generator is arranged in the inner cavity, and an output port which is communicated with the air outlet of the shell in a fluid mode and used for enabling water and negative oxygen ions to flow out is formed in the base.

Compared with the prior art, the utility model has the advantages that: the base is detachably connected with the water mist generating assembly, so that when the atomizing sheet needs to be replaced, the water mist generating assembly is detached, and the whole water mist generating device does not need to be scrapped; in addition, the mount pad can rotate the first state that links to each other to first location portion and second location portion and the second state that first location portion and second location portion break away from around the axis of through-hole, through rotatory mount pad like this, can realize the dismouting of mount pad and connecting seat, for the mode of screwed connection, it is comparatively convenient to first location portion sets up on the base, and second location portion sets up on the mount pad, also can not lose.

Drawings

FIG. 1 is a schematic structural view of a hydrated negative oxygen ion generator according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 with the water tank removed;

FIG. 3 is an exploded view of FIG. 2;

FIG. 4 is an enlarged view of FIG. 3 at B;

FIG. 5 is an enlarged view at C of FIG. 3;

FIG. 6 is a partial cross-sectional view of the mating of the first detent and the second detent;

FIG. 7 is a schematic diagram of the water mist generating assembly of FIG. 2;

FIG. 8 is a cross-sectional view of FIG. 7;

fig. 9 is a cross-sectional view of the electrical connection post of fig. 3;

FIG. 10 is a cross-sectional view of the base of FIG. 2;

fig. 11 is a schematic view showing a structure of an air cleaner to which the hydrated oxygen anion generator of fig. 1 is applied.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 11, the air purifier of the preferred embodiment includes a housing 1 and a hydrated negative oxygen ion generator a, the housing 1 has an inner cavity 11, the hydrated negative oxygen ion generator a is disposed in the inner cavity 11, and the hydrated negative oxygen ion generator a further includes a negative ion generating assembly and a water mist generating device.

As shown in fig. 2, 3 and 10, the water mist generating device includes a base 2 and a water mist generating assembly a, a hollow chamber 21 is provided in the base 2, a negative ion generating assembly is provided in the chamber 21 of the base 2, the negative ion generating assembly includes a negative ion needle (not shown in the figure), a second circuit board 22 which is located outside the chamber 21 and is used for controlling the negative ion needle to work or not is provided in the base 2, and an electrical connection post 23 which extends towards an opening 33 on the mounting base 3 below is provided on the second circuit board 22.

As shown in fig. 1, 2, 7, and 8, the water mist generating assembly a includes a mounting seat 3 and an atomizing plate 4, and certainly, the water mist generating assembly a further includes a water tank 5 and other parts, the mounting seat 3 can be connected to the base 2, and a mounting cavity 31 is provided on the mounting seat 3, the atomizing plate 4 is provided in the chamber 21 of the mounting seat 3, the atomizing plate 4 of the present embodiment is an ultrasonic atomizing plate, a first circuit board 32 for controlling whether the atomizing plate 4 works or not is embedded in the mounting seat 3, and an opening 33 for exposing a connection contact 321 on the first circuit board 32 is provided on the surface of the mounting seat 3. In a state where the mount base 3 is connected to the base 2, the electrical connection posts 23 are inserted into the openings 33 to be in contact with the connection contacts 321 on the first circuit board 32.

The opening 33 for exposing the connecting contact 321 of the first circuit board 32 is formed in the surface of the mounting seat 3, so that the first circuit board and the second circuit board 22 for controlling the operation of the negative ion needle are conveniently in electric connection through contact, the use of wires is reduced, the connection is convenient, and the failure rate is low.

Through hole 24 capable of communicating cavity 21 and installation cavity 31 is formed in base 2, through hole 24 and installation cavity 31 can be connected through transition parts such as connecting pipes, in the embodiment, installation seat 3 partially extends into cavity 21 of base 2 from through hole 24, one port of installation cavity 31 penetrates through installation seat 3 and is located in cavity 21, and installation cavity 31 and cavity 21 are directly communicated with each other without other transition parts, and related parts are few.

As shown in fig. 10 and 11, the housing 1 of the air purifier is provided with an air inlet 12 and an air outlet 13 which are communicated with the inner cavity 11, in this embodiment, the air inlet 12 is provided on a side wall of the housing 1, the air outlet 13 is provided on a top wall of the housing 1, an output port 201 for flowing out of the synthesized negative oxygen ions is provided at the top of the base 2, which is in fluid communication with the air outlet 13 of the housing 1, at least a part of the side wall of the base 2 is inclined gradually from bottom to top, an input port 202 for air to enter the ion generation cavity is provided on the inclined side wall of the base 2, the through hole 24 is provided at the bottom of the base 2, and a flow direction of the air in the cavity 21 of the base 2 is consistent with a flow direction of the air in the housing 1.

The above is the prior art, and reference can be made to the patent in the background art, and redundant description is not repeated here.

The mounting base 3 and the base 2 are detachably connected through a connecting assembly, the connecting assembly may have various structural forms, such as screws, etc., but in order to facilitate the mounting and dismounting of the base 2 and the mounting base 3, as shown in fig. 2 to 6, in this embodiment, the connecting assembly includes a first positioning portion 25 disposed on the base 2 and a second positioning portion 34 disposed on the mounting base 3, the first positioning portion 25 is disposed outside the cavity 21 of the base 2 and located at the periphery of the through hole 24, and the second positioning portion 34 is disposed on the peripheral wall of the mounting base 3. The mounting base 3 can rotate around the axis of the through hole 24 to a first state in which the first positioning portion 25 is connected to the second positioning portion 34 and a second state in which the first positioning portion 25 is disconnected from the second positioning portion 34.

Specifically, in the present embodiment, the first positioning portion 25 is provided with a positioning groove 251, the positioning groove 251 and the second positioning portion 34 are located on the same circumference with the axis of the through hole 24 as the center line, and the positioning groove 251 is used for accommodating the second positioning portion 34.

The second positioning portion 34 is positioned in the positioning groove 251 of the first positioning portion 25 by rotating the mounting base 3, and at this time, the first positioning portion 25 and the second positioning portion 34 are in a first state of being connected; or the second positioning portion 34 is separated from the positioning groove 251, and at this time, the first positioning portion 25 and the second positioning portion 34 are in a separated second state, so that the water mist generating assembly a is mounted and dismounted conveniently; when the second positioning portion 34 enters the positioning groove 251 and abuts against the positioning groove 251, the mounting base 3 cannot rotate continuously, and when the user feels the rotation resistance, the user is prompted to be mounted in place; and the impact of the second positioning portion 34 and the positioning groove 251 will make a sound to prompt the user that the assembly is in place.

Of course, the positioning groove 251 may be formed on the second positioning portion 34 for accommodating the first positioning portion 25 therein.

As shown in fig. 6, in the present embodiment, the mounting seat 3 is located below the base 2, the bottom of the second positioning portion 34 is provided with a first protrusion 341, and the bottom wall of the positioning groove 251 is provided with a second protrusion 252 protruding from the groove opening adjacent to the first protrusion 341 and abutting against the first protrusion 341. The second protrusion 252 stops the first protrusion 341 to limit the second positioning portion 34, and if no external force is applied to the second positioning portion 34, the second positioning portion 34 cannot easily get over the second protrusion 252 to disengage from the positioning groove 251.

As shown in fig. 3, at least two ribs 35 are provided on the outer circumferential wall of the mounting base 3 at intervals along the axial direction thereof, and each rib 35 extends in a direction away from the base 2. Ribs 35 are conveniently used for applying force to mount 3 for rotation, otherwise if mount 3 is smooth on the outside, for applying force to mount 3, the hand is slippery.

As shown in fig. 9, the electrical connection post 23 of the present embodiment includes a cylinder 231, a contact rod 232, and an elastic member 233, wherein one end of the cylinder 231 is mounted on the second circuit board 22, the other end of the cylinder 231 extends toward the connection contact 321 of the first circuit board 32, the contact rod 232 is connected to the other end of the cylinder 231 and can move along the axial direction of the cylinder 231, and the elastic member 233 is disposed in the cylinder 231 and acts on the contact rod 232 to keep the contact rod 232 always moving toward the connection contact 321 of the first circuit board 32. Elastic component 233 application of force is on feeler lever 232, one makes feeler lever 232 and first circuit board 32's connection contact 321 in close contact with, not only guaranteed to realize the electricity between first circuit board 32 and the second circuit board 22 and connect, two make mount pad 3 install the back on base 2, second location portion 34 also can tightly support on the diapire of constant head tank 251 under the effect of elastic component 233 elastic force, make second location portion 34 be difficult to deviate from constant head tank 251, the fastness of being connected of subassembly a and base 2 takes place for the water smoke has been improved.

The electrical connection between the electrical connection post 23 and the first circuit board 32 can be made using prior art structures.

The first positioning portions 25 are at least two and are arranged at non-uniform intervals in the circumferential direction of the through-hole 24 of the base 2, and the second positioning portions 34 are at least two and are arranged at non-uniform intervals in the circumferential direction of the mount 3. Therefore, the mounting base 3 is connected with the base 2 in multiple points, and the connection firmness is good; the non-uniform arrangement is to prevent the contact rod 232 from not contacting the connection contact 321 of the first circuit board 32 when the user is assembled in a misplaced manner, because there are a plurality of second positioning portions 34 and first positioning portions 25, and if they are uniformly distributed, one second positioning portion 34 can be inserted from multiple positions to match one first positioning portion 25, however, in this case, the contact rod 232 may be misaligned with the connection contact 321 of the first circuit board 32, so the second positioning portions 34 and the first positioning portions 25 are arranged in a non-uniform manner, and only one position can be inserted in each second positioning portion 34, so that all the second positioning portions 34 and the first positioning portions 25 can be ensured to be in a one-to-one correspondence, and in this case, when the mounting base 3 is connected to the base 2, the contact rod 232 also contacts the connection contact 321 of the first circuit board 32.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, since the disclosed embodiments of the invention may be arranged in different orientations, these directional terms are for illustrative purposes only and should not be considered limiting, as "upper", "lower", and the like are not necessarily limited to directions opposite to or coincident with the direction of gravity.

The term "fluid communication" as used herein refers to a spatial relationship between two components or portions, which are hereinafter collectively referred to as a first portion and a second portion, respectively, i.e., fluid gas, liquid or a mixture thereof can flow along a flow path from the first portion or/and be transported to the second portion, and may be the first portion and the second portion directly connected to each other, or the first portion and the second portion indirectly connected to each other through at least one third member, such as a pipe, a channel, a duct, a flow guide member, a hole, a groove, or the like, or a chamber (21) or a combination thereof, through which fluid can flow.

Claims (10)

1. A water mist generating device comprises

A base (2) having a hollow chamber (21) therein;

water mist generating module (a) comprising

The mounting seat (3) can be connected with the base (2), and a mounting cavity (31) which can be in fluid communication with the cavity (21) of the base (2) is formed in the mounting seat (3);

the atomizing sheet (4) is arranged in the mounting cavity (31);

the method is characterized in that: the improved structure is characterized in that a through hole (24) capable of communicating the cavity (21) with the mounting cavity (31) is formed in the base (2), a first positioning portion (25) is arranged on the base (2), a second positioning portion (34) is arranged on the mounting base (3), and the mounting base (3) can rotate around the axis of the through hole (24) to a first state that the first positioning portion (25) is connected with the second positioning portion (34) and a second state that the first positioning portion (25) is separated from the second positioning portion (34).

2. The water mist generator according to claim 1, wherein: the mounting seat (3) partially extends into a cavity (21) of the base (2) from the through hole (24), one port of the mounting cavity (31) penetrates through the mounting seat (3) and is located in the cavity (21), the first positioning portion (25) is arranged outside the cavity (21) of the base (2) and is located at the periphery of the through hole (24), and the second positioning portion (34) is arranged on the outer peripheral wall of the mounting seat (3).

3. The water mist generator according to claim 2, wherein: the first positioning parts (25) are at least two and are arranged at intervals along the circumferential direction of the through hole (24) of the base (2), and the second positioning parts (34) are at least two and are arranged at intervals along the circumferential direction of the mounting seat (3).

4. A water mist generator as claimed in any one of claims 1 to 3, wherein: the first positioning part (25) is provided with a positioning groove (251), the positioning groove (251) and the second positioning part (34) can be positioned on the same circumference which takes the axis of the through hole (24) as the central line, and the positioning groove (251) can be used for accommodating the second positioning part (34); or the second positioning part (34) is provided with a positioning groove (251), the positioning groove (251) and the first positioning part (25) can be positioned on the same circumference which takes the axis of the through hole (24) as the central line, and the positioning groove (251) can be used for accommodating the first positioning part (25).

5. The water mist generator according to claim 4, wherein: the mounting seat (3) is positioned below the base (2), a first convex part (341) is arranged at the bottom of the second positioning part (34), and a second convex part (252) which can be positioned outside the first convex part (341) and is abutted against the first convex part (341) is convexly arranged at the position adjacent to the notch on the bottom wall of the positioning groove (251).

6. A hydrated negative oxygen ion generator using the water mist generating device as claimed in any one of claims 1 to 5, wherein: and a negative ion generating assembly is arranged in the cavity (21) of the base (2).

7. The hydrated oxygen anion generator of claim 6, wherein: a first circuit board (32) used for controlling whether the atomizing sheet (4) works or not is embedded in the mounting seat (3), and an opening (33) for exposing a connecting contact (321) on the first circuit board (32) is formed in the mounting seat (3); the negative ion generating assembly comprises a negative ion needle, a second circuit board (22) which is positioned outside the chamber (21) and used for controlling whether the negative ion needle works or not is arranged in the base (2), an electric connecting column (23) extending towards an opening (33) in the mounting base (3) is arranged on the second circuit board (22), and the electric connecting column (23) is inserted into the opening (33) and is contacted with a connecting contact (321) in the first circuit board (32) in a state that the mounting base (3) is connected with the base (2).

8. The hydrated oxygen anion generator of claim 7, wherein: the electrical connection post (23) comprises

A post (231) mounted at one end on the second circuit board (22), the post (231) extending towards the connection contact (321) of the first circuit board (32);

a feeler lever (232) connected to the other end of the cylinder (231) and movable in the axial direction of the cylinder (231);

and an elastic member (233) acting on the contact rod (232) to keep the contact rod (232) always in a tendency of moving toward the connection contact (321) of the first circuit board (32).

9. The hydrated oxygen anion generator of claim 8, wherein: the first positioning parts (25) are at least two and are arranged at intervals which are not uniform along the circumferential direction of the through hole (24) of the base (2), and the second positioning parts (34) are at least two and are arranged at intervals which are not uniform along the circumferential direction of the mounting seat (3).

10. An air purifier using the hydrated negative oxygen ion generator of claim 6, characterized in that: the device comprises a shell (1), wherein the shell (1) is provided with an inner cavity (11), an air inlet (12) and an air outlet (13) which are communicated with the inner cavity (11) are formed in the shell (1), a hydrated negative oxygen ion generator is arranged in the inner cavity (11), and an output port (201) which is communicated with the air outlet (13) of the shell (1) in a fluid mode and used for flowing out of the hydrated negative oxygen ions is formed in a base (2).

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