JP4402342B2 - Negative ion generator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a negative ion generator that generates negative ions by the Leonard effect.
[0002]
[Prior art]
The human body is often charged with positive charges due to positive ions or static electricity released from electrical appliances, etc., and by neutralizing such charges with negative ions, a refreshing effect and further a health promotion effect can be obtained. It has been known. As a device that generates such negative ions, so-called fine water droplets are generated by micronizing water in the air, and the surrounding air is negatively charged by these fine water droplets and blows it. There is a Leonard negative ion generator.
[0003]
FIG. 11 is a schematic perspective view showing the internal structure of a conventional Leonard-type negative ion generator, which is disclosed in Patent Document 1 described later. An intake port 101 is opened near the front bottom of the substantially cuboid shell-shaped casing 100, and outside air taken in from the intake port 101 is stored in the vicinity of the bottom of the hook by the flow path. The air blower 102 is introduced.
[0004]
Above the blower 102, an inverted bottomed cylindrical first gas-liquid separator 104 is disposed, and openings are provided on the peripheral surfaces near the upper and lower ends of the first gas-liquid separator 104, respectively. is there. A duct 103 extending from the blower 102 is connected to the upper opening of the first gas-liquid separator 104, and the wind generated by the blower 102 passes through the duct 103 into the first gas-liquid separator 104. It is introduced so as to be substantially tangential to the inner peripheral surface. In addition, an inverted bottomed cylindrical second gas-liquid separator 105 is provided in the vicinity of the first gas-liquid separator 104 and has openings near the upper and lower ends, respectively. The lower opening 104 and the lower opening of the second gas-liquid separator 105 are communicated with each other through a communication tube 106.
[0005]
A hole of a predetermined size is formed in the ceiling of the first gas-liquid separator 104, and the motor 107 is fitted and fixed in a manner that the drive shaft projects into the first gas-liquid separator 104. is there. A substantially disc-shaped rotating body 109 is fixed to the drive shaft of the motor 107, and the periphery of the rotating body 109 is covered with a cap-shaped ring 110. Above the rotator 109, a water supply pipe 108 for supplying water extends through the ceiling of the first gas-liquid separator 104, and the water supplied from the water supply pipe 108 onto the rotator 109 is provided. Spreads over the entire upper surface of the rotator 109 and is scattered around by the centrifugal force generated by the rotation of the rotator 109, collides with the ring 110 described above to become positively charged fine water droplets and negatively ionizes the surrounding air.
[0006]
As described above, the first gas-liquid separator 104 is swirled with the air that has been erected from the blower 102, whereby relatively large water droplets are separated and the inner peripheral wall of the first gas-liquid separator 104 is separated. The atmosphere containing fine water droplets and negative ions is introduced to the vicinity of the lower end in the second gas-liquid separator 105 through the communication tube 106 while falling along the inner peripheral wall.
[0007]
The atmosphere introduced into the second gas-liquid separator 105 rises spirally upward in the second gas-liquid separator 105. At this time, fine water droplets are separated and the second gas-liquid separator 105 is separated. The moist atmosphere containing negative ions is introduced into the upper opening of the second gas-liquid separator 105. A blow-out opening is formed in the upper front portion of the housing 100, and the blow-out opening and the upper opening of the second gas-liquid separator 105 are connected by a blow-out path 111. The atmosphere introduced into the upper opening of the second gas-liquid separator 105 is blown out from the blowout port via the blowout path 111.
[0008]
A rectangular water tank 120 is disposed in the vicinity of the bottom of the housing 100 and in the vicinity of the side opposite to the blower 102 described above, and water is supplied into the water tank 120 above the water tank 120. A cartridge tank 121 is detachably disposed. A basin-shaped water receiving member 125 is interposed between the water tank 120 and the cartridge tank 121, and the water receiving member 125 receives water droplets dropped from the first and second gas-liquid separators 104 and 105 described above. In order to receive, it extends below the second gas-liquid separator 105 and between the first gas-liquid separator 104 and the blower 102. The bottom portion of the water receiving member 125 is tapered with a portion facing the water tank 120 being lowered, and an opening is provided in this low portion, and the water receiving member 125 falls from the first and second gas-liquid separators 104 and 105 to receive the water receiving member. The water received by 125 is returned to the water tank 120.
[0009]
A water intake pipe of a water supply pump (not shown) is inserted into the water tank 120, and the water supply pipe 108 described above is connected to the water outlet of the water supply pump. In addition, a drain pump 123 is disposed at the bottom of the water tank 120 so that the water in the water tank 120 is drained by the drain pump 123.
[0010]
In such a negative ion generator, water is supplied into the water tank 120 by the cartridge tank 121, and when a predetermined time (for example, 48 hours) has elapsed since the start of the operation of the apparatus, the operation is stopped. The water in the water tank 120 is drained by the drain pump 123, or the operation stop is urged by a display lamp or the like provided in the housing 100. As described above, since the water in the water tank 120 is regularly exchanged, the water in the water tank 120 is prevented from being contaminated by outside air or microorganisms, and a clean and odorless wind containing negative ions is generated. It is blown out from the outlet.
[0011]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-19202 (FIG. 2)
[0012]
[Problems to be solved by the invention]
However, in such a conventional negative ion generator, water is supplied to the rotating body 109 by a water supply pump, and splashed water due to centrifugal force generated by the rotation of the rotating body 109 is collided with the ring 110 to form fine water droplets. Since negative ions are generated, a water supply pump and a water supply pipe 108 disposed between the water supply pump and the rotating body 109 are required. Therefore, the number of parts is large, the device configuration is complicated, and the parts cost and assembly cost are high. In addition, the number of negative ions produced is determined by the number of fine water droplets produced, but in order to produce as many fine water droplets as possible, the amount of water supplied by the water supply pump is appropriately controlled according to the number of revolutions of the rotating body 109. Therefore, there is a problem in that the cost of parts is further increased when a water supply pump corresponding to such control is used.
[0013]
The present invention has been made in view of such circumstances, and an object thereof is to provide a negative ion generator capable of simplifying the device configuration and easily controlling the negative ion generation efficiency to a high level. There is to do.
[0014]
[Means for Solving the Problems]
  According to the first aspect of the present invention, there is provided a liquid tank that stores liquid, a rotating body that is rotatably arranged in a state where a part of the liquid is stored in the liquid tank, and the rotary body is driven to rotate. A driving unit, and a barrier portion that is disposed around a portion of the rotating body that is not immersed in the liquid, and collides with the liquid scattered from the rotating body to generate negative ions;A liquid level detector for detecting a predetermined upper limit liquid level and a lower limit liquid level of the liquid tank, a controller for controlling the rotational drive operation of the drive unit based on the detection result of the liquid level detector,A negative ion generator comprising:The liquid level detector includes a pair of electrodes for electrolysis for electrolyzing the liquid supplied from the liquid tank to the rotating body, and the liquid level detector has a predetermined depth according to the size of the rotating body in the liquid tank. The upper limit liquid level detection electrode for detecting the upper limit liquid level by the energization state between the electrode for electrolysis and the deeper position than the upper limit liquid level detection electrode in the liquid tank And a lower limit liquid level detecting electrode for detecting a lower limit liquid level according to an energization state between the electrode for electrolysis, andIt is characterized by providing.
[0015]
The invention according to claim 2 comprises a discharge means for discharging the liquid in the liquid tank, and a tank for storing the liquid discharged by the discharge means, and the controller is configured so that the liquid level detector has an upper limit liquid level. The discharge means is actuated when detected.
[0016]
  The invention described in claim 3The electrode for electrolysis, the electrode for upper limit liquid level detection, and the electrode for lower limit liquid level detection have a plate shape, and the electrode for electrolysis and the electrode for lower limit liquid level detection are substantially in the liquid tank. In the same depth position, arranged in parallel to each other with a distance in a direction intersecting the depth direction of the liquid tank, the upper limit liquid level detection electrode is spaced a predetermined distance from the electrolysis electrode, The insulating plate is disposed in a direction intersecting with the electrolysis electrode, and an insulating plate is provided between the electrolysis electrode and the lower limit liquid level detection electrode.It is characterized by being.
[0017]
  Invention of Claim 4 is the saidElectrolysis electrodeas well asThe liquid level detectorIs arranged on the outer side of the rotating body with respect to the barrier portion in the liquid tank.
[0018]
  The invention according to claim 5SaidA recess is provided on the peripheral surface of the liquid tank, and the recess is in the recess.Electrolysis electrodeas well asThe liquid level detectorIs arranged.
[0019]
  According to a sixth aspect of the present invention, the liquid level detector comprises:SaidA cover member covering the upper limit liquid level detection electrode is provided.
[0020]
The invention according to claim 7 is provided with an alarm device for issuing an alarm, and the controller detects the lower limit liquid level when the detection result of the upper limit liquid level is continuously given from the liquid level detector for a predetermined time. When a result is given, the alarm device is activated.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the liquid in the liquid tank is immersed in the liquid of the rotating body by rotating the rotating body rotatably arranged in a mode in which a part of the liquid is stored in the liquid tank. It is scattered from the part that is not, and collides with the wall part to generate negative ions. At this time, when the liquid level detector detects a predetermined upper limit liquid level or lower limit liquid level in the liquid tank, for example, the controller stops the rotational driving operation of the driving machine. As described above, since the negative ions are generated by scattering the liquid in the liquid tank by the rotating body, the configuration of the apparatus can be simplified. Furthermore, since the rotating body is operated in an optimal liquid level range in which the negative ion generation efficiency is high based on the detection result of the liquid level detector, the negative ion generation efficiency can be easily controlled to a high level. In addition, as the barrier portion, a part of the peripheral surface standing on the bottom surface of the liquid tank can be applied, but a substantially ring-shaped portion is provided around the rotating body separately from the peripheral surface of the liquid tank. Then, it may be a barrier. As the liquid level detector, various detection types such as a photoelectric type, an ultrasonic type, and an energization type can be applied.
[0032]
In the present invention, the controller operates the discharge means when the liquid level detector detects the upper limit liquid level, and discharges the liquid in the liquid tank to the tank. Accordingly, the liquid can be prevented from leaking from the liquid tank, and the rotating body can be operated at an optimum upper liquid level or less where the generation efficiency of negative ions is high. In addition, although the drainage pump can be considered as the discharging means, it is preferable that the tank is disposed below the liquid tank and an electromagnetic valve disposed between the liquid tank and the tank is used as the discharging means. This further simplifies the device configuration.
[0033]
Further, in the present invention, an inexpensive energization type liquid level detector is used, and the upper limit liquid level detection electrode and the lower limit liquid level detection electrode are appropriately set within the height of the rotating body disposed in the liquid tank. The upper limit liquid level and the lower limit liquid level are detected based on the energized state. Since the energized liquid level detector is installed in this way, the liquid level can be detected with relatively high accuracy even by the liquid splashed from the rotating body and the undulation of the liquid level generated in the liquid tank by the rotation of the rotating body. Can be detected.
[0034]
Furthermore, since the upper limit liquid level detection electrode and the lower limit liquid level detection electrode are disposed outside the rotating body from the barrier portion disposed around the rotating body in the liquid tank, the electrodes are scattered from the rotating body. The liquid collides with this barrier and is prevented from scattering to the outside and does not reach the upper limit liquid level detection electrode and the lower limit liquid level detection electrode, thus preventing erroneous detection of the liquid level due to liquid scattering. Is done.
[0035]
Similarly, since the upper limit liquid level detection electrode and the lower limit liquid level detection electrode are arranged in the recess provided in the peripheral wall of the liquid tank, the ripple generated in the liquid tank by the rotation of the rotating body enters the recess. This prevents the liquid level from being erroneously detected.
[0036]
On the other hand, since the liquid level detector is provided with a cover member that covers the upper limit liquid level detection electrode, even if the liquid in the liquid tank is ruffled by the rotation of the rotating body, The influence on the detection of the liquid level can be suppressed as much as possible.
[0037]
When the liquid level detector detects the upper limit liquid level or the lower limit liquid level, the controller activates the alarm device, so that the user can immediately perform corresponding operations such as resetting the apparatus, waste liquid, and supplying liquid. . Furthermore, when the detection result of the upper limit liquid level is continuously given for a predetermined time from the liquid level detector, the controller temporarily activates the liquid level detector due to the rippling of the liquid in the liquid tank. Even when the upper limit liquid level is detected, the controller does not activate the alarm device, and can prevent the occurrence of a false alarm.
[0038]
  Also,BookIn the invention, the liquid in the liquid tank is electrolyzed by the pair of electrodes for electrolysis. The electrolyzed liquid is considered to have a smaller cluster, thereby improving the number of negative ions generated by forming into fine droplets.
[0039]
In particular, the rotating body disposed in the liquid tank is rotated, and the liquid splashed from the rotating body is made to collide with the barrier portion disposed around the portion of the rotating body not immersed in the liquid. When negative ions are generated as droplets, a large number of fine droplets and negative ions are generated due to collision of a liquid having small clusters with a barrier.
[0040]
Since the electrode for electrolysis is arranged outside the rotating body from the barrier in the liquid tank, it is hardly affected by the electrolysis of the liquid due to the liquid splashed from the rotating body, and the electrolysis is stably performed. It can be carried out.
[0041]
In addition, since the electrode for electrolysis is disposed in the recess provided in the peripheral wall of the liquid tank, it is possible to suppress the ripples generated in the liquid tank due to the rotation of the rotating body from entering the recess and stably Can be electrolyzed.
[0042]
Furthermore, in the present invention, in addition to the electrode for electrolysis, an energized liquid level detector is provided, so that a large negative ion generating ability can be obtained by small clustering of the liquid by electrolysis. Further, a larger negative ion generating ability can be obtained by optimizing the liquid level in the liquid tank. Further, the upper limit liquid level detection electrode and the lower limit liquid level detection electrode are respectively disposed at appropriate depths according to the dimensions of the rotating body disposed in the liquid tank. Then, the upper limit liquid level is detected by the energization state between the electrolysis electrode and the upper limit liquid level detection electrode, and the lower limit liquid level is detected by the energization state between the electrolysis electrode and the lower limit liquid level detection electrode. To do. Thus, since one electrode for detecting the liquid level is an electrode for electrolysis, the number of electrodes can be reduced as much as possible, and the component cost is low.
[0043]
Furthermore, in the present invention, both the electrolysis electrode, the upper limit liquid level detection electrode and the lower limit liquid level detection electrode are plate-shaped, and both the electrolysis electrode and the lower limit liquid level detection electrode are in the liquid tank. Are arranged in parallel with each other at a distance in the direction intersecting the depth direction of the liquid tank, and an insulating plate is provided between the electrodes for electrolysis and the lower limit liquid level detection electrode. It is provided. By arranging the three electrodes in parallel in this way, the electrolysis efficiency between the electrodes for both electrolysis is high and the lower limit liquid level can be detected stably, while the insulating plate can be used for both electrolysis. Since the electrode and the lower limit liquid level detection electrode are partitioned, even when these three electrodes are arranged in parallel, the influence on the electrolysis efficiency between the two electrolysis electrodes can be reduced as much as possible. it can.
[0044]
On the other hand, since the upper limit liquid level detection electrode is disposed in a direction intersecting with the electrolysis electrode at a predetermined distance from the electrolysis electrode, the upper limit liquid level detection sensitivity is high. The influence on the electrolysis efficiency in the meantime can be reduced as much as possible.
[0045]
Furthermore, since the upper limit liquid level detection electrode and the lower limit liquid level detection electrode are disposed outside the rotating body from the barrier portion disposed around the rotating body in the liquid tank, the electrodes are scattered from the rotating body. The liquid collides with this barrier and is prevented from scattering to the outside and does not reach the upper limit liquid level detection electrode and the lower limit liquid level detection electrode, thus preventing erroneous detection of the liquid level due to liquid scattering. Is done.
[0046]
Similarly, since the upper limit liquid level detection electrode and the lower limit liquid level detection electrode are arranged in the recess provided in the peripheral wall of the liquid tank, the ripple generated in the liquid tank by the rotation of the rotating body enters the recess. This prevents the liquid level from being erroneously detected. Further, when the electrode for electrolysis, the electrode for detecting the upper limit liquid level and the electrode for detecting the lower limit liquid level are arranged in one recess, the apparatus configuration can be made compact.
[0047]
By the way, in the present invention, the upper limit liquid level detection electrode is covered with the cover member of the liquid level detector. For this reason, even when a ripple occurs in the liquid in the liquid tank due to the rotation of the rotating body, the influence of the ripple on the detection of the upper limit liquid level can be suppressed as much as possible.
[0048]
On the other hand, in the present invention, when the liquid level detector detects the upper limit liquid level or the lower limit liquid level, the controller activates the alarm device, so that the user can immediately respond to device reset, waste liquid, liquid supply, etc. The operation can be performed. At this time, the controller activates the alarm device when the detection result of the upper limit liquid level is continuously given from the liquid level detector for a predetermined time. As a result, even if the liquid level detector detects the upper limit liquid level temporarily due to the swell of the liquid in the liquid tank, the controller does not activate the alarm device and prevents the occurrence of a false alarm. Can do.
[0049]
【Example】
The contents of the present invention will be described below in detail with reference to the drawings.
1 is a rear sectional view of a negative ion generator according to the present invention, FIG. 2 is a side sectional view of the negative ion generator shown in FIG. 1, and FIG. 3 is a negative ion generator shown in FIG. FIG. In this negative ion generator, a so-called Leonard type negative ion generator and a so-called discharge type negative ion generator are housed in a housing 1.
[0050]
The casing 1 has a band-shaped convex portion 5 having a trapezoidal shell shape in the bottom view in the center of the front surface which is one long side of a rectangular shell having rounded four corners over substantially the entire region in the height direction. Appropriate regions including the two corners on the front side of the housing 1 are respectively formed as vertically openable doors 3 and 3. A plurality of external air inlets 4, 4,... Opened in the height direction of the doors 3 and 3 are arranged at appropriate intervals in the lateral direction. A pre-filter for removing relatively large dust in the outside air is detachably attached so as to block the outside air intakes 4, 4,.
[0051]
A first fan 10 having a sirocco fan 11 and a fan motor 12 is provided on the bottom side of the housing 1 so that the sirocco fan 11 rotates about an axis passing through the approximate center in the width direction of the housing 1 from the front to the back. The first fan 10 is housed in a fan case 13 having an opening on the front side of the housing 1. The opening of the fan case 13 is closed with a filter such as ULPA, and this filter is detachably supported by a frame-shaped pressing member 16.
[0052]
Above the first fan 10 is a substantially rectangular box-shaped water storage tank 15 extending from the position of one side of the case 1 to the vicinity of the other side of the case 1 slightly from the center of the case 1. They are arranged at a predetermined distance. A Leonard motor 18 is disposed between the first fan 10 and the water storage tank 15 with its rotary shaft 19 facing upward, and the rotary shaft 19 passes through the bottom of the water tank 15 and the water storage tank. Projected to a predetermined height in 15.
[0053]
The rotating shaft 19 in the water storage tank 15 is provided with a Leonard fan 26 having a cylindrical bearing portion 23 with its upper end closed on the central axis in the leg-shaped main body 22. The part 23 is fixed in a state of being fitted on the rotary shaft 19. A plurality of grooves extending from the lower edge to the upper edge of the main body 22 are formed on the outer peripheral surface of the main body 22 at appropriate intervals in the circumferential direction. A flat annular flange 25 projects from the upper peripheral edge of the main body 22, and a plurality of comb teeth 24, 24,... is there.
[0054]
The region on the Leonard fan 26 side that is a half of the opening of the water storage tank 15 is closed by a Leonard cover 17 that is provided with a vent hole, and an edge portion that is located at the approximate center of the water storage tank 15 of the Leonard cover 17 Encloses the upper peripheral surface of the Leonard fan 26. A duct 14 extending from the fan case 13 is connected to the vent hole of the Leonard cover 17. On the other hand, the other half of the opening of the water storage tank 15 is closed by a gas-liquid separator 30 that performs gas-liquid separation by a cyclone method in a vertical double cylinder.
[0055]
Water is poured into the water storage tank 15 to a height approximately at the center of the Leonard fan 26. When the Leonard fan 26 is rotated by driving the rotation shaft 19 of the Leonard motor 18, the water in the water storage tank 15 is wetted. , Mainly rising along the groove on the outer peripheral surface of the main body 22, scattered by the centrifugal force in the vicinity of the flange 25, which is blown and crushed by the comb teeth 24, 24,. Colliding with the peripheral edge of the surrounding Leonard cover 17 and the upper inner peripheral surface of the water storage tank 15 produces a large amount of fine water droplets that are positively charged, which causes the surrounding air to be negatively ionized and negative ions to be highly efficient. Generated.
[0056]
The wind generated by the first fan 10 is sent from the vent of the Leonard cover 17 to the periphery of the Leonard fan 26 through the fan case 13 and the duct 14, and the atmosphere containing negative ions and fine water droplets is gas-liquid by this ventilation. It is introduced into the separator 30. Therefore, a moist atmosphere containing negative ions from which fine water droplets have been removed is sent out from the outlet 31 of the gas-liquid separator 30.
[0057]
The ceiling portion of the housing 1 is a detachable upper cover 2, which is in the vicinity of the other side of the housing 1 of the upper cover 2 and opposed to the outlet 31 of the gas-liquid separator 30. A water supply port 35 is provided, and the water supply port 35 is sealed with a water supply lid 36 that can be freely opened and closed. Between the water supply port 35 and the delivery port 31 of the gas-liquid separator 30, a baffle wall portion 41 that constitutes the air passage 40 is interposed, and the baffle wall portion 41 guides the air into the air passage 40. The atmosphere containing negative ions is guided to the upper front of the housing 1 by the air passage 40.
[0058]
In addition, when the first fan 10 is operated without operating the Leonard fan 26, clean air, in which dust or the like is filtered by the prefilter and the filter, is introduced into the air passage 40. Operate.
[0059]
An appropriate region including the upper end portion of the belt-like convex portion 5 provided on the front surface of the housing 1 is formed as a tapered portion 55 having a substantially trapezoidal shape in plan view, the thickness of which decreases toward the upper end portion. In the upper half region of the taper portion 55, a rectangular first outlet 61 having a width slightly shorter than the width is opened, and a louver 63 is attached to the first outlet 61.
[0060]
On the other hand, a columnar discharger 21 that generates negative ions by discharge is disposed near one side of the case 1 that is opposite to the water storage tank 15 in the case 1. The cover 2 is connected to a second outlet 62 provided in the vicinity of the side portion of the cover 2 opposite to the water supply lid 36. Further, the second fan 20 is connected to the discharger 21, and negative ions generated by the discharge by the discharger 21 are sent out from the second outlet 62 by blowing air from the second fan 20.
[0061]
Thus, since the 2nd blower outlet 62 is provided in the one side vicinity of the upper cover 2, and the water supply port 35 is provided in the other side vicinity of the upper cover 2, the operativity of the water supply to the water storage tank 15 is good. On the other hand, it is possible to prevent water from being accidentally supplied into the second outlet 62 and to reliably supply water to the water supply port 35.
[0062]
Incidentally, in the lower half region of the taper portion 55 of the belt-like convex portion 5 described above, a plurality of operation buttons 56, 56,... Mounted on the first base 71, and operation display lamps 59, 59,. Is arranged. In the vicinity of the taper portion 55 of the belt-like convex portion 5, a hole portion 53 having a rectangular tube shape when viewed from the front is provided, and a transparent blocking member such as a transparent resin or glass is fitted and fixed to the back opening of the hole portion 53. Thus, the first window 51 is provided. Further, a projector 54 such as an LED that emits blue light into the first window 51 is disposed on the back ceiling in the hole 53. In the present embodiment, the projector 54 is disposed in the hole 53. However, the present invention is not limited to this, and the projector 54 may be disposed at an appropriate position on the inner side of the housing 1 from the first window 51. Needless to say, it is good.
[0063]
On the other hand, an opening having the same size as the first window 51 is provided in a portion of the water storage tank 15 facing the first window 51, and a transparent blocking member such as a transparent resin or glass is fitted into the opening. The second window 52 is fixed. The first window 51 and the second window 52 are provided at positions facing the Leonard fan 26, and the operating state of the Leonard fan 26 and the first window 51 and the second window 52 are projected by the light from the projector 54. The driving level can be observed. At this time, the first window 51 is in a state of being surrounded by the hole 53 at the back of the cylindrical hole 53 provided in the belt-like convex part 5, so that the incidence of external light is suppressed as much as possible. On the other hand, the inside of the projector can be clearly observed by the projection from the projector 54. Further, since the first window 51 and the second window 52 form a double window, leakage of the operation sound of the Leonard fan 26 is prevented.
[0064]
Further, a drain outlet is opened at the bottom near the other side of the water storage tank 15 described above, and one end of a water distribution pipe 46 having an electromagnetic valve 45 interposed is connected to the drain outlet. The other end of the water distribution pipe 46 is joined to a water supply / drain port provided at the top of a tank 47 detachably installed below the water distribution pipe 46, and when the electromagnetic valve 45 is opened, the water storage tank 15 The water inside is drained into the tank 47.
[0065]
On the other hand, a vertically long rectangular opening 15a is formed on the circumferential surface of the water storage tank 15 at a position different from the second window 52 described above and lower than the height positions of the comb teeth 24, 24,. A plurality of electrodes for detecting an upper limit water level and a lower limit water level in the water storage tank 15 and generating hypochlorite ions having a sterilizing effect by electrolyzing chlorine ions in tap water. An electrode part 37 formed by fitting is fixedly fitted.
[0066]
FIG. 5 is an enlarged perspective view showing the electrode part 37 shown in FIG. 1, in which 370 is an electrode part case. A plate-shaped first electrode 371 extending from the center of the electrode part case 370 to the substantially lower peripheral wall is disposed at a substantially right angle at the bottom of the electrode part case 370 in the vertically long rectangular box-like electrode part case 370. In other words, a plate-like second electrode 372 and a third electrode 373 that are slightly shorter than the first electrode 371 are arranged in parallel with the first electrode 371 with a predetermined gap from the first electrode 371. The third electrode 373 is spaced a little from the lower peripheral wall of the electrode case 370 to detect the lower limit water level, as will be described later. The third electrode 373 and the second electrode 372 are separated by an insulating plate 375. It has been.
[0067]
A plate-like fourth electrode 374 is arranged above the first electrode 371 so as to be substantially T-shaped with the first electrode 371 at a predetermined distance from the first electrode 371 so as to detect the upper limit water level. It is set up. Cylindrical screw receiving portions protrude from the four corners of the electrode case 370, and the opening of the electrode case 370 is closed with a case cover described later, and the case cover is screwed into each screw receiving portion. The case cover is fixed to the electrode part case 370 by screws.
[0068]
An alternating current is passed through the first electrode 371 and the second electrode 372 in order to improve the electrolytic effect, and chlorine ions in tap water stored in the water storage tank 15 (see FIG. 1) are transferred to both electrodes 371. , 372 and electrolyzed water containing hypochlorous acid is generated. In addition to the tap water, a NaCl solution may be injected into the water storage tank 15. Since the electrolyzed water generated in this way has a sterilizing effect, the water in the water storage tank 15 is kept clean. On the other hand, the amount of negative ions produced by the aforementioned Leonard fan 26 (see FIG. 1) is improved as compared with the case where normal water that is not electrolyzed is used. The amount of negative ions produced by using electrolyzed water is higher than that of normal water that has not been electrolyzed in this way. This is thought to be due to an improvement in the production amount of.
[0069]
The first electrode 371 or the second electrode 372 and the third electrode 373 function as a lower limit water level detector that detects the lower limit water level in the water storage tank 15 depending on the presence or absence of conduction between both electrodes. The lower limit water level signal output from the lower limit water level detector is given to a controller described later. Then, the controller determines that the water level in the water storage tank 15 has fallen below the lower limit water level when the given lower limit water level signal is off.
[0070]
On the other hand, the first electrode 371 or the second electrode 372 and the fourth electrode 374 function as an upper limit water level detector that detects the upper limit water level in the water storage tank 15 based on the presence or absence of conduction between both electrodes. An upper limit water level signal output from the upper limit water level detector is also supplied to the controller. Then, the controller determines that the water level in the water storage tank 15 has reached the upper limit water level when the given upper limit water level signal is ON.
[0071]
FIG. 6 is a perspective view showing the electrode portion 37 with the case cover attached. In the figure, parts corresponding to those shown in FIG. As shown in FIG. 6, screw holes for inserting screws are respectively formed at the four corners of the substantially rectangular box-shaped case cover 378 corresponding to the screw receiving portions provided in the electrode case 370. The case cover 378 is fixed in a state having a required gap between the case cover 378 and the electrode portion case 370 by screws inserted into the screw holes and screwed into the screw receiving portions of the electrode portion case 370.
[0072]
Further, an appropriate region covering the fourth electrode 374 (see FIG. 5) of the case cover 378 is blinded, and a plurality of strip-shaped openings 379, 379,... , 379,..., And the gap provided between the case cover 378 and the electrode case 370, water flows into the electrode case 370. As described above, the appropriate area covering the fourth electrode 374 is provided with the case cover 378 that is blindfolded. Therefore, even if the water surface in the water storage tank 15 (see FIG. 1) undulates due to the rotation of the Leonard fan 26, An erroneous detection of the upper limit water level by the fourth electrode 374, which is wave-absorbed by the case cover 378 and is normally in a non-detection state, can be suppressed as much as possible.
[0073]
On the other hand, near the lower edge of the hole 53 of the belt-like convex portion 5, a plurality of adjustment buttons 66, 66,... Including a button for adjusting the operation level of the negative ion generator, and an operation level display lamp for displaying the operation level. Are arranged on the second base 72. The adjustment buttons 66, 66,... And the operation level display lamps 67, 67,.
[0074]
FIG. 7 is a bottom view showing the water storage tank 15, the Leonard fan 26, and the electrode part 37, and illustrates the attachment state of the electrode part 37 to the water storage tank 15. FIG. In the figure, parts corresponding to those shown in FIG. 1 and FIG. The Leonard cover 17 is provided with a barrier wall portion 17a surrounding a substantially half circumference on the central side of the water storage tank 15 of the Leonard fan 26, and is a peripheral surface of the water storage tank 15, and the Leonard fan 26 extends from the wall wall 17a. A rectangular opening 15a is provided at a position on the outer side. The electrode case 370 described above is fixed to the outer peripheral surface of the water storage tank 15 so as to cover the rectangular opening 15a. In the electrode case 370, the first to fourth electrodes 371 to 374 described above and An insulating plate 375 (see FIG. 5) is stored.
[0075]
In this way, the electrode case 370 is disposed on the outer peripheral surface of the water storage tank 15 and on the outer side of the Leonard fan 26 with respect to the wall 17a. Therefore, the rotation of the Leonard fan 26 scatters the Leonard fan 26. The impacted water collides with the barrier portion 17a and is prevented from scattering to the outside, and does not reach the first to fourth electrodes 371 to 374 stored in the electrode portion case 370. A decrease in electrical resolution is prevented.
[0076]
Furthermore, since the electrode case 370 is fixed to the outer peripheral surface of the water storage tank 15, the first to fourth electrodes 371 to 374 stored therein are located outside the inner peripheral surface of the water storage tank 15. . For this reason, even if a wave is generated on the water surface in the water storage tank 15 due to the rotation of the Leonard fan 26, it is suppressed from entering the electrode unit case 370 and becomes a small wave. Are prevented from being erroneously detected and the electrical resolution is reduced. Thus, since the influence of the waves generated in the water storage tank 15 and the influence of the scattered water described above are reduced, the effect of preventing erroneous detection of the water level and the effect of preventing the reduction in electrical resolution are synergistically achieved.
[0077]
In addition to the shape of the wall portion 17a shown in FIG. 7, the wall portion may be a part of the peripheral surface of the water storage tank 15. Further, as shown in FIG. An annular belt-shaped barrier portion 17b surrounding substantially the entire circumference of 26 may be used.
[0078]
FIG. 4 is a partially enlarged front view showing a main part of the belt-like convex portion 5 shown in FIG. In the figure, parts corresponding to those shown in FIG. As shown in FIG. 4, in the vicinity of the lower edge of the first outlet 61 of the taper portion 55, a first ion level display bar 57 for displaying the negative ion delivery level due to the Leonard effect in stages, and a negative due to discharge. A second ion level display bar 58 for displaying the ion delivery level step by step is provided in a line.
[0079]
For example, when the first fan 10 and the Leonard motor 18 (both see FIG. 1) are both at the high level, the first ion level display bar 57 emits four lights indicating the maximum level, and the first fan 10 or the Leonard motor. When 18 is high level and Leonard motor 18 or first fan 10 is low level, it emits three or two lights indicating medium level, and when both first fan 10 and Leonard motor 18 are low level, low level When the Leonard motor 18 is stopped, no light indicating the ion level is emitted regardless of the operating state of the first fan 10.
[0080]
For example, when the second fan 20 (see FIG. 1) is at a high level, the second ion level display bar 58 emits two lights indicating a large level, and when the second fan 20 is at a low level, it indicates a small level. It emits one light.
[0081]
Further, the operation operation button 56 for stopping all the operations in the order from the right toward the drawing (“OFF”) in the portion below the first and second ion level display bars 57 and 58 of the taper portion 55, for example. Operate the Leonard motor 18 at the low level, operate the first fan 10 at the low level, and operate the second fan 20 at the low level ("soft"). Operate the operation button 56 and the Leonard motor 18 at the low level. The first fan 10 is operated at a high level, the second fan 20 is operated at a low level (“standard”), the operation button 56 and the Leonard motor 18 are operated at a high level, and the first fan 10 is operated at a high level. The operation buttons 56 are arranged so that the second fan 20 is operated at a high level ("rapid").
[0082]
Further, on the side of these operation buttons 56, 56,..., An operation display lamp 59 that lights when the Leonard motor 18 is operated (“big”), and an operation display that lights when the second fan 20 is operated (“petit”) A lamp 59 and an operation display lamp 59 that is turned on during operation of the first fan 10 (“air cleaning”) are arranged at corresponding positions together with a schematic diagram of the negative ion generator.
[0083]
As described above, the first window 51 is disposed in the vicinity of the lower edge of the tapered portion 55 of the belt-like convex portion 5. Thus, the first outlet 61 is disposed on the upper portion of the tapered portion 55, and the operation buttons 56, 56,... Are disposed near the lower edge of the first outlet 61, Furthermore, since the 1st window 51 is arrange | positioned under the operation button 56,56, ... of the strip | belt-shaped convex part 5, the user can directly perceive the blowing state from the 1st blowing outlet 61. FIG. At the same time, the operating state of the Leonard fan 26 can be directly viewed from the first window 51.
[0084]
By the way, in the vicinity of the lower edge of the hole 53 of the belt-like convex portion 5, a drain button 68 for opening the electromagnetic valve 45 (both see FIG. 1) interposed in the water distribution pipe 46, the lower limit water level from the aforementioned lower limit water level detector. When the water supply lamp 74 and the drain button 68 that are turned on to promote water supply to the water storage tank 15 (see FIG. 1) are operated when the signal is off, and when a predetermined time (for example, 24 hours) has elapsed from the start of operation, the water storage tank A draining lamp 75 that is turned on when the water is drained from 15 and an excessive lamp 76 that is turned on when the upper limit water level signal from the upper limit water level detector is on are provided. Further, a tank detector for detecting the presence / absence of the tank 47 is disposed at a portion where the tank 47 at the bottom of the casing 1 contacts, and the tank 47 is not set at a predetermined position in the casing 1. A tank set lamp 77 that is lit when the tank detector is in an on state is disposed in the vicinity of the drain button 68.
[0085]
Also, below the drain button 68, the adjustment level 66 for adjusting the operation level (strongness and stop) of the second fan 20, the operation level (strongness and stop) of the first fan 10 and the Leonard motor 18 are adjusted. The adjustment button 66 for adjusting the operation level (strength and stop) of the first fan 10 is arranged vertically in this order, and corresponds to each adjustment button 66, 66, 66. Further, operation level display lamps 67, 67,... For individually displaying the operation levels (strong and weak and stop) are provided.
[0086]
Further, below these adjustment buttons 66, 66 and 66, when a predetermined time (for example, one month) is counted after the built-in timer is reset, a maintenance lamp 78 which is lit to encourage cleaning of the water storage tank 15. And a reset button 73 for turning off the maintenance lamp 78 and resetting the timer.
[0087]
FIG. 9 is a block diagram showing a part of the control system of the negative ion generator shown in FIG. 1, in which 70 is a controller mounted on the first base 71 or the second base 72. The controller 70 includes a recording unit such as an EEPROM in which a predetermined control procedure is recorded in advance, and a predetermined operation clock is given from the clock 84. Then, the controller 70 controls the operation of each unit as follows in accordance with the control procedure recorded in the recording unit.
[0088]
When the power is supplied from the power source, the controller 70 determines whether the signal from the tank detector 83 is off, that is, whether the tank 47 is present, and if it is off, the electromagnetic valve 45 is opened. After all the water is drained from the water storage tank 15, the solenoid valve 45 is closed (see FIG. 1 for all). The controller 70 waits until a reset signal is given from the reset button 73. When this is given, the maintenance lamp 78 is turned off and the built-in timer is reset, and then the count value of the timer is preset. It is determined whether or not a set value (for example, a value corresponding to one month) has been reached. Then, when the count value reaches a predetermined value, the controller 70 blinks the maintenance lamp 78 and prompts the user to clean the water storage tank 15 or the like.
[0089]
Further, the controller 70 includes another timer, and resets the timer every time the timer counts a predetermined value, and changes the polarity of the first electrode 371 and the second electrode 372 (see FIG. 5). The polarity switcher 81 for switching switches the polarity.
[0090]
On the other hand, the controller 70 determines whether or not an ON signal that cannot detect the tank is given from the tank detector 83, and if it is given, the Leonard motor 18, the first fan 10, and the second fan 20 are given. In addition, the operation of the discharger 21 is stopped and the tank set lamp 77 blinks.
[0091]
Further, the controller 70 takes in the upper limit water level signal and the lower limit water level signal given from the upper limit water level detector 37a and the lower limit water level detector 37b, and determines whether the upper limit water level signal is on or not, and the lower limit water level signal is off. Each is judged whether or not there is. When the lower limit water level detection signal is off, the controller 70 stops the operation of the Leonard motor 18, the first fan 10, the second fan 20, and the discharger 21, and causes the buzzer 82 to operate for a predetermined time (for example, 5 seconds). Generate an alarm sound. In addition, the controller 70 opens the electromagnetic valve 45 to drain the remaining water from the water storage tank 15 to the tank 47, blinks the draining lamp 75, and opens the electromagnetic valve 45 for a predetermined time ( After elapse of 35 seconds, for example, the solenoid valve 45 is closed, the draining lamp 75 is turned off, and the water supply lamp 74 is blinked to notify the user that water supply is required.
[0092]
On the other hand, when the given upper limit water level detection signal is ON, the controller 70 determines whether or not the ON state continues for a predetermined time (for example, 3 seconds). And the operation of the Leonard motor 18, the first fan 10, the second fan 20, and the discharger 21 are stopped, and the buzzer 82 generates an alarm sound for a predetermined time (for example, 5 seconds). Then, the controller 70 determines whether or not the signal from the tank detector 83 is OFF, that is, whether or not the tank 47 exists. If it is OFF, the electromagnetic valve 45 is opened and the tank 15 is stored in the tank 15. Drains to 47 and flashes the draining lamp 75 to determine whether a predetermined time (for example, 5 seconds) has elapsed since the solenoid valve 45 was opened. If the predetermined time has elapsed, the solenoid valve 45 is closed. In addition, the excessive lamp 76 and the draining lamp 75 are turned off.
[0093]
By the way, the controller 70 determines whether or not a predetermined time (for example, 24 hours) has passed since the lower limit water level detection signal given from the lower limit water level detector 37b is turned on, and the predetermined time has passed. If it is determined, the operation of the Leonard motor 18, the first fan 10, the second fan 20, and the discharger 21 is stopped, and it is determined whether or not the signal from the tank detector 83 is OFF. In some cases, the electromagnetic valve 45 is opened and the drainage from the water storage tank 15 to the tank 47 is completed, and then the electromagnetic valve 45 is closed.
[0094]
In the present embodiment, a case has been described in which negative ions are generated by a Leonard fan 26 in which a plurality of comb teeth 24, 24,... The invention is not limited to this, and it goes without saying that the invention can be applied to an apparatus that generates negative ions by a rotating body partially immersed in a water storage tank.
[0095]
(Comparative example)
Next, the amount of negative ions generated when negative ions are generated by generating electrolyzed water using the negative ion generator shown in FIG. 1 and when negative ions are generated without generating electrolyzed water are compared. The results will be described.
[0096]
FIG. 10 is a bar graph showing the results of comparing the amount of negative ions generated depending on the presence or absence of electrolyzed water generation. In the figure, the vertical axis represents the amount of ion generation, and the horizontal axis represents the distance from the negative ion generator. Further, (a) shows a case where the negative ion generator is not operated, (b) shows a case where electrolyzed water is not generated, and (c) shows a case where electrolyzed water is generated. As is clear from the comparison between FIGS. 10A and 10B, a large amount of negative ions is generated from the negative ion generator even when electrolyzed water is not generated. However, as is clear from the comparison between FIGS. 10B and 10C, when the electrolyzed water is generated, the amount of negative ions generated is significantly increased compared to the case where the electrolyzed water is not generated. Yes.
[0097]
【The invention's effect】
  According to the first aspect of the present invention, the negative ion is generated by scattering the liquid in the liquid tank by the rotating body, so that the device configuration can be simplified. Furthermore, since the rotating body is operated in an optimal liquid level range in which the negative ion generation efficiency is high based on the detection result of the liquid level detector, the negative ion generation efficiency can be easily controlled to a high level.In addition to the electrode for electrolysis, an energized liquid level detector is provided, so that a large negative ion generating ability can be obtained by small clustering of the liquid by electrolysis. By optimizing the liquid level, a larger negative ion generation ability can be obtained. Further, the upper limit liquid level detection electrode and the lower limit liquid level detection electrode are respectively disposed at appropriate depths according to the dimensions of the rotating body disposed in the liquid tank, and the electrolysis electrode and the upper limit liquid described above are disposed. The upper limit liquid level is detected by the energization state between the electrode for level detection and the lower limit liquid level is detected by the energization state between the electrode for electrolysis and the electrode for lower limit liquid level detection. Thus, since one electrode for detecting the liquid level is an electrode for electrolysis, the number of electrodes can be reduced as much as possible, and the component cost is low.
[0098]
In the second aspect of the present invention, the controller operates the discharge means when the liquid level detector detects the upper limit liquid level to discharge the liquid in the liquid tank to the tank, so that the liquid leaks from the liquid tank. In addition, the rotating body can be operated at an optimum upper liquid level or less where the negative ion generation efficiency is high.
[0099]
  In the present invention described in claim 3,Both electrolysis electrodes, upper limit liquid level detection electrodes and lower limit liquid level detection electrodes are plate-shaped, and both electrolysis electrodes and lower limit liquid level detection electrodes are located at substantially the same depth in the liquid tank. Are arranged in parallel to each other at a distance in the direction intersecting the depth direction of the liquid tank, and an insulating plate is provided between both the electrolysis electrode and the lower limit liquid level detection electrode. While the electrolysis efficiency between the electrodes for electrolysis is high and the lower limit liquid level can be detected stably, the insulating plate separates the electrodes for electrolysis and the lower limit liquid level from each other. Even when these three electrodes are arranged in parallel, the influence on the electrolysis efficiency between the electrodes for electrolysis can be reduced as much as possible. In addition, since the upper limit liquid level detection electrode is arranged in a direction intersecting with the electrolysis electrode at a predetermined distance from the electrolysis electrode, the upper limit liquid level detection sensitivity is high, but both electrolysis electrodes The influence on the electrolysis efficiency in the meantime can be reduced as much as possible.
[0100]
  In this invention of Claim 4,Liquid level detector (ieUpper limit liquid level detection electrode and lower limit liquid level detection electrode)Is disposed on the outside of the rotating body in the liquid tank from the barrier portion disposed around the rotating body, so that the liquid scattered from the rotating body collides with the barrier portion and moves to the outside. Is prevented from reaching the upper limit liquid level detecting electrode and the lower limit liquid level detecting electrode, and therefore, erroneous detection of the liquid level due to liquid scattering is prevented.Furthermore, since the electrode for electrolysis is also arranged outside the rotating body from the barrier in the liquid tank, like the liquid level detector, the liquid splashed from the rotating body is affected by the electrolysis of the liquid. It is difficult and stable electrolysis can be performed.
[0101]
  In this invention of Claim 5, in the recessed part provided in the surrounding wall of a liquid tankLiquid level detector (ieUpper limit liquid level detection electrode and lower limit liquid level detection electrode)Therefore, the undulation generated in the liquid tank due to the rotation of the rotating body is suppressed from entering the concave portion, and erroneous detection of the liquid level is prevented.In addition, since the electrode for electrolysis is disposed in the recess provided in the peripheral wall of the liquid tank, it is possible to suppress the ripples generated in the liquid tank due to the rotation of the rotating body from entering the recess and stably Can be electrolyzed. Furthermore, when the electrode for electrolysis and the liquid level detector (that is, the electrode for detecting the upper limit liquid level and the electrode for detecting the lower limit liquid level) are arranged in one recess, the apparatus configuration can be made compact.
[0102]
In the present invention described in claim 6, since the liquid level detector is provided with a cover member that covers the upper limit liquid level detection electrode, the liquid in the liquid tank is ruffled by the rotation of the rotating body. However, the influence of the ripple on the detection of the upper limit liquid level can be suppressed as much as possible.
[0103]
In the present invention according to claim 7, when the liquid level detector detects the upper limit liquid level or the lower limit liquid level, the controller operates the alarm device, so that the user can immediately reset the device, waste liquid, liquid supply Etc. can be performed. Furthermore, when the detection result of the upper limit liquid level is continuously given for a predetermined time from the liquid level detector, the controller temporarily activates the liquid level detector due to the rippling of the liquid in the liquid tank. Even when the upper limit liquid level is detected, the controller does not activate the alarm device, and can prevent the occurrence of a false alarm.
[Brief description of the drawings]
FIG. 1 is a rear sectional view showing a negative ion generator according to the present invention.
FIG. 2 is a side sectional view of the negative ion generator shown in FIG.
FIG. 3 is an external perspective view of the negative ion generator shown in FIG.
4 is a partially enlarged front view showing a main part of a belt-like convex portion shown in FIG. 1. FIG.
5 is an enlarged perspective view showing an electrode portion shown in FIG. 1. FIG.
FIG. 6 is a perspective view showing an electrode portion with a case cover attached.
FIG. 7 is a bottom view showing a water storage tank, a Leonard fan, and an electrode part.
FIG. 8 is an explanatory view for explaining another embodiment of the barrier portion.
9 is a block diagram showing a part of a control system of the negative ion generator shown in FIG. 1. FIG.
FIG. 10 is a bar graph showing the result of comparing the amount of negative ions generated depending on the presence or absence of electrolyzed water generation.
FIG. 11 is a schematic perspective view showing the internal structure of a conventional Leonard-type negative ion generator.
[Explanation of symbols]
1 housing
2 Top cover
5 Band-shaped convex part
15 Water tank
17 Leonard Cover
17a Wall
26 Leonard Fan
35 Water inlet
37 Electrode section
37a Upper water level detector
37b Lower limit water level detector
45 Solenoid valve
55 Taper
56 Operation buttons
57 First ion level display bar
58 Second ion level display bar
59 Operation indicator lamp
61 First outlet
62 Second outlet
66 Adjustment button
67 Operation level indicator lamp
70 Controller
74 Water supply lamp
75 Drainage lamp
76 Too much lamp
83 Tank detector
370 Electrode Case
371 First electrode
372 Second electrode
373 Third electrode
374 Fourth electrode
375 Insulation plate
378 case cover
379 opening

Claims (7)

A liquid tank for storing liquid;
A rotating body rotatably arranged in a mode in which a part of the liquid is stored in the liquid tank;
A drive for rotating the rotating body;
A wall portion that is disposed around a portion of the rotating body that is not immersed in the liquid, and collides with the liquid scattered from the rotating body to generate negative ions;
A liquid level detector for detecting a predetermined upper limit liquid level and a lower limit liquid level of the liquid tank;
A controller for controlling the rotational driving operation of the driving machine based on the detection result of the liquid level detector;
A negative ion generator comprising:
While comprising a pair of electrolysis electrodes for electrolyzing the liquid supplied from the liquid tank to the rotating body,
The liquid level detector is
Arranged at a predetermined depth according to the dimensions of the rotating body in the liquid tank,
An upper limit liquid level detecting electrode for detecting an upper limit liquid level according to a current-carrying state between the electrode for electrolysis;
A lower limit liquid level detection electrode that is disposed at a position deeper than the upper limit liquid level detection electrode in a liquid tank, and detects a lower limit liquid level by an energized state between the electrode for electrolysis;
The negative ion generator characterized by comprising.   A discharge means for discharging the liquid in the liquid tank; and a tank for storing the liquid discharged by the discharge means, and the controller controls the discharge means when the liquid level detector detects an upper limit liquid level. 2. The negative ion generator according to claim 1, wherein the negative ion generator is operated. The electrode for electrolysis, the electrode for upper limit liquid level detection and the electrode for lower limit liquid level detection have a plate shape,
The electrode for electrolysis and the electrode for lower limit liquid level detection are arranged in parallel to each other at a distance in the direction intersecting the depth direction of the liquid tank at substantially the same depth position in the liquid tank,
The upper limit liquid level detection electrode is disposed in a direction intersecting the electrolysis electrode at a predetermined distance from the electrolysis electrode, and the electrolysis electrode, the lower limit liquid level detection electrode, negative ion generating apparatus Oh Ru claim 1 or 2, wherein the insulating plate is provided between the. The electrode for electrolysis and the liquid level detector are:
The negative ion generator of any one of Claims 1-3 arrange | positioned on the outer side of the said rotary body rather than the said wall part in the said liquid tank. Yes recess is provided on the peripheral surface of the tank, the negative ion generating device according to any one of claims 1 to 4, wherein the electrolysis electrode, and the liquid level detector in the concave portion is arranged . The liquid level detector is
Negative ion generating apparatus according to claim 1 comprising a cover member covering the upper liquid level sensing electrode. Equipped with an alarm to emit an alarm,
The controller is
The alarm device is operated when the detection result of the upper limit liquid level is continuously given from the liquid level detector for a predetermined time or when the detection result of the lower limit liquid level is given . The negative ion generator according to any one of 6 .

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