CN1542345A - Air purifier - Google Patents
Air purifier Download PDFInfo
- Publication number
- CN1542345A CN1542345A CNA03138580XA CN03138580A CN1542345A CN 1542345 A CN1542345 A CN 1542345A CN A03138580X A CNA03138580X A CN A03138580XA CN 03138580 A CN03138580 A CN 03138580A CN 1542345 A CN1542345 A CN 1542345A
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- air
- casing
- guide frame
- air purifier
- dust
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Abstract
The air purifier includes casing with opened front part and air exhausting top, inlet lattice with air filter in the opening, driving motor installed inside the casing, turbine fan on the rotation shaft of the motor to form air blowing pressure, dust collecting filter in front of the fan to filter out fine dust, and partition board set between the dust collecting filter and the fan to separate the space inside the casing into blowing chamber and trapping chamber. The air purifier has great ventilation capacity and high running efficiency, and may be used in large space.
Description
Technical field
The present invention relates to air purifier.
Background technology
In general, the pocket clarifier is can form a comfortable indoor environment by it being included in the device that pollutants such as various dusts in the room air, pernicious gas, peculiar smell, flue gas are removed.
The air purifier of prior art as shown in Figure 1, it is by constituting with lower member: promptly positive open, the casing (10) of exhaust outlet (11) has then been formed on the top; Be installed on the opening portion of casing (10), and the air-inlet grille (15) of the air cleaner of the pollutant in can filtered air is housed; Be installed in the inboard of exhaust outlet (11), can form the air-supply arrangement (20) that air-supply is pressed; Be installed in the front of air-supply arrangement (20), the dust-collecting filter (25) that the fine dust that has flow through air cleaner (18) can be filtered out; Be arranged between air-supply arrangement (20) and the dust-collecting filter (25), can become plenum chamber and capture chamber to the internal separation of casing (10), and above the dividing plate (30) of air-supply arrangement (20) and dust-collecting filter (25) is housed.
For the air that can be inhaled into the effect by air-supply arrangement (20) guides to exhaust outlet, formed fan guard (fan housing) (12) on the casing (10) here.Fan guard (12) is as the guide frame of giving prominence to from the back face forward of casing (10) (guide), and it is the round-shaped of open-top, and this structure is in order to guide row's air upward to exhaust outlet (11).And open part (14) is shortcut curve (cutoff) shape, and this shape is the shape that broadens again after a kind of cross section narrows down in certain interval, can improve the efficient of air-supply by this shape.
Air-inlet grille (15) is made of the panel (panel) identical with the shape of the opening portion of casing (10), and has formed air inlet (16) on its core.On the position of certain intervals lid (17) is being housed with air inlet (16), it not only can make the outward appearance of air purifier more attractive in appearance, has also formed air inlet (16) simultaneously.
In addition, in mounted and removable mode air cleaner (18) is installed on the inwall of air-inlet grille (15), it can filter out the relatively large pollutant of airborne particle that flows under the effect of air-supply arrangement (20).
Air-supply arrangement (20) comprises motor (21) and blowing fan (22), and wherein motor is installed in the back side of dividing plate (30), and it can produce driving force.Blowing fan is installed on the rotating shaft of motor (21), and it can produce air-supply power.The feature of blowing fan (22) is: it is a kind of circulating fan, and its place ahead has formed wind pushing hole (31), thereby can suck air, the air that is inhaled into can be discharged to the outer ring of fan direction again simultaneously.
Dust-collecting filter (25) comprises ionization part (26) and catches portion (27), wherein ionization part can make the fine dust that flows through air cleaner (18) charged when the gap by high-tension spray point (not shown) and the corresponding utmost point (not shown) that discharges, and the portion of catching then can catch the charged fine dust that flows through ionization part (26).
Simultaneously, light catalyst filter (29) also is equipped with in the back of catching portion (27), and the peculiar smell particle that this light catalyst filter can be less relatively with airborne particle is caught, and can resolve into CO to them
2And H
2O, thus remove airborne peculiar smell.
Dividing plate (30) is the plate-shaped member that can divide the inner space of casing (10), its central authorities have formed wind pushing hole (31), formed guide frame (32) on the outer ring of wind pushing hole (31), this guide frame can make dust-collecting filter (25) and light catalyst filter (29) insert in the mode of slide (sliding) and fixing from a side.The upper end of guide frame (32) has formed the Sub-assembly Dept (33) that is used for installing high pressure generator (41) and tellite (42).
Meanwhile, the wind pushing hole (31) on the dividing plate (30) has formed grid (grill) shape, and the caused vibration of motor (21) in order to reduce to be installed in the dividing plate back, has also formed stiffener (rib) (53).
Have a look the course of action of the air purifier of prior art below with said structure.
At first, if power connection, high pressure generator (41) will be to motor (21) and dust-collecting filter (25) power supply so.Simultaneously, along with the startup of motor (21), the blowing fan (22) that is connected on the rotating shaft can begin action, thereby indoor air is sucked by air inlet (16).Leaked-in air is through air cleaner (18) time, and wherein the relatively large pollutant of particle can be filtered out.
Afterwards, the fine dust that has flow through air cleaner (18) through dust-collecting filter (25) thus the time can charged polarization, and charged dust can be adsorbed in the portion of catching (27), thereby can be eliminated.Next, air is through light catalyst filter (29) time, and the particle of volume minimum---the peculiar smell particle can be converted to CO
2And H
2O, airborne thus peculiar smell will be eliminated.
Having passed through the aforesaid process that clears the pollution off air afterwards can be via wind pushing hole (31) row to blowing fan (22), like this by row come air again can be under the effect of fan guard (12) by row to exhaust outlet (11), just can realize the process that purifies air thus.
But, be circulation fan owing to what install in the air purifier of prior art, and this fan is having certain limitation aspect the increase air output, therefore be difficult to the detergent power of air purifier is brought up to higher level.The problem of bringing so thus is that it can not be applied in the broad space that needs large capacity equipment.
In addition, owing on the air inlet in the front that is formed at air-inlet grille, lid is housed, and make the channel design of leaked-in air become complicated, therefore there is the problem that is difficult to improve air-supply efficient.
In addition, because motor is installed in the back of the dividing plate that dust-collecting filter and various electronic installations are housed, thereby the vibration that is produced during motor-driven can be passed to various devices and air purifier integral body.And bring thus and be difficult to reduce air purifier produces vibration and noise in running problem.
Summary of the invention
In order to overcome the above-mentioned shortcoming that prior art exists, the invention provides a kind of air purifier, to improve its operational efficiency, it can be applied in the broad space that needs large capacity equipment, and reduce its vibration that in use produces and noise.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of air purifier comprises that the casing of exhaust outlet has then been formed on the open at its front top, be installed on the shell opening part and inwall on the air-inlet grille of dismountable air cleaner is housed, comprise the motor that can produce power on the inwall that is installed in casing and be installed in and to form the turbine fan that air-supply presses and the air-supply arrangement that constitutes on the rotating shaft of motor, be installed in the dust-collecting filter that the fine dust that has flow through air cleaner can be filtered out in the place ahead of air-supply arrangement, be arranged on the dividing plate that the internal separation of casing can be become plenum chamber and capture chamber between dust-collecting filter and the air-supply arrangement.
Described air purifier is characterized in that having formed the fixed part that is used for installing described motor on the inwall at the described casing back side, has formed several stiffeners on the circle of described fixed part.
Described air purifier, wherein the two ends of air-inlet grille have formed the inclined plane, thereby formed front air inlet and side air inlet mouth on the front on the air-inlet grille and two sides, the upper end of described air-inlet grille has also formed the demonstration hole that can allow the user see running status simultaneously.
Described air purifier, its median septum comprises filter installation portion, Sub-assembly Dept and cover, described filter installation portion, and it is a plate-shaped member, its central authorities have formed wind pushing hole, and described dust-collecting filter is installed in the front of described wind pushing hole in mounted and removable mode; Described Sub-assembly Dept forms in the upper end of described filter installation portion, and high-tension high pressure generator and tellite are installed in above it; Cover (housing) portion forms in the back of described dividing plate, is positioned on the inwall of described casing, the air of being discharged by described turbine fan can be guided to exhaust outlet.
Described air purifier has formed guide frame on its middle filtrator installation portion and on the outer ring of described wind pushing hole, and this guide frame can make described dust-collecting filter install in mounted and removable mode.
Described air purifier, wherein the control box lid is equipped with in the front of Sub-assembly Dept, and on the described control box lid with on the corresponding part in described demonstration hole display floater is being housed, and it can show the running status of air purifier.
Described air purifier, wherein guide frame comprises cover guide frame, air draft guide frame and guide panel; Described cover guide frame is rearward given prominence to from two angles of dividing plate lower end, and it is close to the angle of casing and installs, and can make the inner space that forms circle of casing; Described air draft guide frame, it forms on an angle of described dividing plate upper end, and it is the shortcut curve shape; Described guide panel forms on another angle relative with described air draft guide frame, and it can guide air to exhaust outlet.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the exploded perspective view of the air purifier of prior art
Fig. 2 is the stereogram of air purifier of the present invention
Fig. 3 is the exploded perspective view of the major part of air purifier of the present invention
Fig. 4 is the lateral cross-sectional view of the major part of air purifier of the present invention
Fig. 5 is the front elevation of the casing of air purifier of the present invention
Fig. 6 is the front elevation of the air-inlet grille of air purifier of the present invention
Fig. 7 is the lateral cross-sectional view of the air-supply arrangement of air purifier of the present invention
Fig. 8 is the stereogram of the dividing plate of air purifier of the present invention
Fig. 9 is the stereogram dorsad of the dividing plate of air purifier of the present invention
The number in the figure explanation:
50: casing 51: exhaust outlet
52: fixed part 53: stiffener (rib)
55: air-inlet grille 56: air inlet
56a: front air inlet 56b: side air inlet mouth
58: air cleaner 59: show (display) hole
60: air-supply arrangement 61: motor
62b: blade (blade) 62: guard shield (shroud)
65: dust-collecting filter 66: ionization part
67: catch portion 69: light catalyst filter
70: dividing plate 71: the filter installation portion
72: guide frame 72a: collude hanging projection
73: wind pushing hole 73a: curved face part
75: cover (housing) portion
76: cover guide frame (housing guide)
78: guide plate (guide panel) 79: fixed part
81: control lid (control box cover)
81a: display floater (display panel) 82: terminals (terminal)
The specific embodiment
With reference to the accompanying drawings an example that has adopted air purifier of the present invention is described in detail.
Air purifier of the present invention such as Fig. 2 be to shown in Figure 4, and it comprises with lower member, i.e. open at its front, and the casing (50) of exhaust outlet (57) has then been formed on the top; Be installed in mounted and removable mode on the opening portion of casing (50), and the air-inlet grille (55) of air cleaner (58) is housed on the inwall; By the motor on the inwall that is contained in casing (50) (61) be installed in the turbine fan (62) on the rotating shaft of motor (61) and the air-supply arrangement (60) that constitutes; Be installed in the place ahead of air-supply arrangement (60), the dust-collecting filter (65) that the fine dust that has flow through air cleaner (58) can be filtered out; Be arranged between dust-collecting filter (65) and the air-supply arrangement (60), can become the internal separation of casing (50) dividing plate (70) of plenum chamber and capture chamber.
Casing (50) is extremely shown in Figure 5 as Fig. 3, on its inwall at the back side, formed the fixed part (52) that is used for installing motor (61), formed several stiffeners (rib) (53) on the circle of fixed part (52), it can subdue the vibration that is produced when motor (61) drives.
So, being installed in vibration that the motor (61) at the back side of casing (50) produced when driving understands under the effect of stiffener (53) and be subdued, can stop other device that is installed on the dividing plate (70) and air purifier integral body with the motor interlock thus, thereby reduce vibration and the noise that air purifier produces in running.
In addition, in casing (50), the lower end of its opening portion has formed a pair of mounting groove (54), and it can play the effect of accurate location when dividing plate is installed.Formed the connecting hole (50a) that is used for installing dividing plate in addition on its each angle.
Air-inlet grille (55) is as Fig. 2, Fig. 3, shown in Figure 5, and its front has formed front air inlet (56a), and the two ends of air-inlet grille (55) have formed the inclined plane, and has formed side air inlet mouth (56b) on the inclined plane.Because this structure can make incoming air area increase, therefore can suck more air, doing like this is that situation in order to increase with the air output that turbine fan (62) is installed is complementary.
In addition, the upper end of air-inlet grille (55) has formed demonstration hole (59), can confirm the running status of air purifier by it, and this running status is to show that by being installed in the inboard control box in hole (59) shows.
Air-supply arrangement (60) comprises motor (61) and turbine fan (62), and wherein motor is installed on the casing (50), and it can produce driving force; Turbine fan is installed on the rotating shaft of motor (61), and it can produce air-supply and press.Turbine fan (62) comprises substrate (62a), blade (62b), guard shield (62c), and the substrate of circular plate shape (62a) is connected on the rotating shaft of motor (61); Several blades (62b) extend to the inboard of substrate (62a) from the outer ring of substrate (62a), compare with circulation fan, and it can further improve air-supply efficient; Guard shield (62c) is connected the end of blade (62b), and (62a) compares with substrate, and its diameter is less relatively, is ring (ring) shape, and its cross section is the curve form that caves inward, and this shape can prevent the leaked-in air turbulization.
Dust-collecting filter (65) as shown in Figure 3, it comprises ionization part (66) and catches portion (67), wherein ionization part can be to having flow through air cleaner (58) thus fine dust provide electric charge to make it charged, the portion of catching can make the dust that has flow through ionization part (66) be adsorbed on above it under the effect of electrostatic force, thereby airborne pollutant is removed.
Dividing plate (70) is shown in Fig. 8,9, and it comprises filter installation portion (71), Sub-assembly Dept (74), cover portion (75); Be that filter installation portion (71) is the plate-shaped member that can divide the inner space of casing (50), its central authorities have formed wind pushing hole (73), and dust-collecting filter (65) (not shown) is installed in its front in mounted and removable mode; Sub-assembly Dept (74) forms in the upper end of filter installation portion (71), can provide high-tension high pressure generator (not shown) and tellite (not shown) to be installed in above it to dust-collecting filter (65); Cover (housing) portion (75) is made of several guide frames, and these guide frames are outstanding from the back of dividing plate (70), and the inside that is positioned at casing also can make the inside of casing form the shape of fan guard.
Formed on the filter installation portion (71) from the forwards outstanding guide frame in the outer ring of wind pushing hole (73), the front shape of guide frame (72) is a quadrangle, and it can prevent that the dust-collecting filter (65) that inserts from moving on the limit.
In addition, the end of guide frame (72) has formed several and has colluded hanging projection (72a), and it can prevent that the dust-collecting filter of installing (65) from coming off.It is made with elastomeric material, if apply the power greater than its elastic force, colludes hanging projection (72a) so and will open certain amount, and dust-collecting filter (65) can be spun off.
The end of wind pushing hole (73) has formed curved face part (73a) simultaneously, and this curved face part forms curved surface by bending to the inside, and it can prevent to take place the phenomenon of turbulent flow in the air that flows to turbine fan (62) by wind pushing hole (73).
In addition, because curved face part (73a) is inserted in the inboard of the blade (62c) of turbine fan (62), so it can prevent that the air that flows through wind pushing hole (73) runs off the efficient thereby raising is blown to the outside of turbine fan (62).
As shown in Figure 3, be equipped with in the Sub-assembly Dept (74) and can high-tension high pressure generator be provided and can control the operation of air purifier and tellite that running status is shown etc. to dust-collecting filter (65).Control box lid (81) (control box cover) is equipped with in the front of Sub-assembly Dept (74).
In addition, on control box lid (81), with on the corresponding part in demonstration hole (59) of air-inlet grille (55) display floater is housed, it can show the running status of air purifier, so the user can confirm the running status of air purifier according to its demonstration.
The structure of cover portion (75) is the guide frame that forms later at dividing plate (70), and this guide frame can guide the air of being discharged by turbine fan (62) to exhaust outlet (51).Guide frame forms on each angle of dividing plate (70) back, and they are rearward outstanding.
Shown in Fig. 8,9, guide frame comprises cover guide frame (76), air draft guide frame (77), guide panel (78) again, cover guide frame (housing guide) (76) forms on two angles of dividing plate (70) lower end, it casing (50) thus the side of (not shown) and bottom surface couple together and form circular space in the inside of casing (50); Air draft guide frame (77) forms shortcut curve (cutoff) shape on an angle of dividing plate (70) upper end, therefore not only can make the inside of casing (50) form circular space, and the air of discharge is quickened; Guide panel (guide panel) (78) forms on another angle relative with air draft guide frame (77), and it has formed exhaust outlet with air draft guide frame (77).
In addition, between the angle of the outside of cover guide frame (76), air draft guide frame (77), guide panel (78) one side and casing (50), formed several fixed parts (79), can be installed to dividing plate (70) on the casing (50) by them.
Meanwhile, the lower end of dividing plate (70) forms a pair of installation projection, by it is inserted in the installation slot part (54) of casing (50), can be installed in dividing plate (70) on the accurate position of casing (50).
Have a look the course of action of air purifier of the present invention below with said structure.
As shown in Figure 3, if power connection, motor (61) will start so, thereby room air is forced to suck.Leaked-in air passes through air cleaner (58), dust-collecting filter (65), light catalyst filter (69) afterwards, and airborne pollutant, dust, flue gas, peculiar smell etc. will be eliminated.
Afterwards, the air that pollutant has been eliminated can flow to turbine fan (62) along curved face part, can under the guiding of cover guide frame (76), air draft guide frame (77) and guide panel (78), being flowed to exhaust outlet (51) by row to the inner air of casing (50) under the effect of turbine fan (62), be discharged into indoor at last again.The such process of process has just realized the purification to air.
The effect of invention
Air purifier of the present invention with structure, because turbine fan has been installed, and at air-inlet grille On formed front air inlet and side air inlet mouth, therefore can increase the air output of air-supply arrangement, and Adapt with the air output increase, can supply fully air by front air inlet and side air inlet mouth. Therefore advantage of the present invention is can be applied in the broad space that needs large capacity equipment.
In addition, by the motor that is used for driving turbine fan being installed in the inwall of the casing that has formed stiffener On, the conduct vibrations that can stop air purifier to produce in running is given air purifier integral body, Thereby can make air purifier with more stable state operation, this also is an advantage of the present invention.
Claims (7)
1, a kind of air purifier, it is characterized in that it comprises that the casing of exhaust outlet has then been formed on the open at its front top, be installed in the air-inlet grille that dismountable air cleaner is housed on the inwall on the shell opening part, by the motor that can produce power on the inwall that is installed in casing be installed in and form the turbine fan that air-supply presses and the air-supply arrangement that constitutes on the rotating shaft of motor, be installed in the dust-collecting filter that the fine dust that has flow through air cleaner can be filtered out in the place ahead of air-supply arrangement, be arranged on the dividing plate that the internal separation of casing can be become plenum chamber and capture chamber between dust-collecting filter and the air-supply arrangement.
2, air purifier according to claim 1 is characterized in that having formed the fixed part that is used for installing described motor on the inwall at the described casing back side, has formed several stiffeners on the circle of described fixed part.
3, air purifier according to claim 1, the two ends that it is characterized in that described air-inlet grille have formed the inclined plane, thereby formed front air inlet and side air inlet mouth on the front on the air-inlet grille and two sides, the upper end of described air-inlet grille has also formed the demonstration hole that can allow the user see running status simultaneously.
4, air purifier according to claim 1, it is characterized in that described dividing plate comprises filter installation portion, Sub-assembly Dept and cover, described filter installation portion, it is a plate-shaped member, its central authorities have formed wind pushing hole, and described dust-collecting filter is installed in the front of described wind pushing hole in mounted and removable mode; Described Sub-assembly Dept forms in the upper end of described filter installation portion, and high-tension high pressure generator and tellite are installed in above it; Cover (housing) portion forms in the back of described dividing plate, is positioned on the inwall of described casing, the air of being discharged by described turbine fan can be guided to exhaust outlet.
5, air purifier according to claim 4 is characterized in that forming guide frame on the described filter installation portion and on the outer ring at described wind pushing hole, and this guide frame can make described dust-collecting filter install in mounted and removable mode.
6, air purifier according to claim 4, the control box lid is equipped with in the front that it is characterized in that described Sub-assembly Dept, and on the described control box lid with on the corresponding part in described demonstration hole display floater is being housed, it can show the running status of air purifier.
7, air purifier according to claim 4 is characterized in that described guide frame comprises cover guide frame, air draft guide frame and guide panel; Described cover guide frame is rearward given prominence to from two angles of dividing plate lower end, and it is close to the angle of casing and installs, and can make the inner space that forms circle of casing; Described air draft guide frame, it forms on an angle of described dividing plate upper end, and it is the shortcut curve shape; Described guide panel forms on another angle relative with described air draft guide frame, and it can guide air to exhaust outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB03138580XA CN100374786C (en) | 2003-04-30 | 2003-04-30 | Air purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB03138580XA CN100374786C (en) | 2003-04-30 | 2003-04-30 | Air purifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1542345A true CN1542345A (en) | 2004-11-03 |
| CN100374786C CN100374786C (en) | 2008-03-12 |
Family
ID=34323748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB03138580XA Expired - Fee Related CN100374786C (en) | 2003-04-30 | 2003-04-30 | Air purifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100374786C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674535A (en) * | 2016-03-31 | 2016-06-15 | 海信（山东）空调有限公司 | Air inlet grille of air purifier and air purifier |
| CN106440077A (en) * | 2016-09-29 | 2017-02-22 | 广东美的制冷设备有限公司 | Air purifier |
| CN106705247A (en) * | 2015-07-29 | 2017-05-24 | 刘希威 | Air purification device and method |
| CN108159818A (en) * | 2017-12-27 | 2018-06-15 | 庄伟峰 | A kind of air cleaning facility of handware atelier environmental protection |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10433455B2 (en) * | 2016-03-30 | 2019-10-01 | Leviton Manufacturing Co., Inc. | Wiring device with heat removal system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63126515A (en) * | 1986-11-17 | 1988-05-30 | Daicel Chem Ind Ltd | Air cleaner |
| JP2000051625A (en) * | 1998-08-05 | 2000-02-22 | Matsushita Electric Ind Co Ltd | Electric appliance |
| JP2000126527A (en) * | 1998-10-22 | 2000-05-09 | Zojirushi Corp | Air cleaner |
| US6616736B2 (en) * | 2000-01-25 | 2003-09-09 | Hunter Fan Company | Air purifier |
| CN2515579Y (en) * | 2001-12-18 | 2002-10-09 | 广东省生态环境与土壤研究所 | Indoor air purifier with optical catalytic assembly |
-
2003
- 2003-04-30 CN CNB03138580XA patent/CN100374786C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705247A (en) * | 2015-07-29 | 2017-05-24 | 刘希威 | Air purification device and method |
| CN105674535A (en) * | 2016-03-31 | 2016-06-15 | 海信（山东）空调有限公司 | Air inlet grille of air purifier and air purifier |
| CN106440077A (en) * | 2016-09-29 | 2017-02-22 | 广东美的制冷设备有限公司 | Air purifier |
| CN106440077B (en) * | 2016-09-29 | 2019-04-23 | 广东美的制冷设备有限公司 | Air purifier |
| CN108159818A (en) * | 2017-12-27 | 2018-06-15 | 庄伟峰 | A kind of air cleaning facility of handware atelier environmental protection |
| CN108159818B (en) * | 2017-12-27 | 2020-10-30 | 泉州市惠安碧益茶业有限公司 | Environment-friendly air purification equipment for hardware manufacturing workshop |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100374786C (en) | 2008-03-12 |
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