JP5302658B2 - Mist generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To end supply of water by detecting water quantity abnormality in a water storage part due to failure of a flow regulation mechanism in simple circuit structure. <P>SOLUTION: In a centrifugal type mist generator 4, water is supplied in predetermined flow rate from the flow regulation mechanism 46 provided on a supply water pipe 20a through an injection port 45 to the water storage part 38 to be introduced to a rotating member 34 that is rotated by a motor 6. The centrifugal type mist generator 4 includes a motor current detection circuit 61 to detect drive current at the motor 6, and a supply water control circuit 62 to end supply of water by closing the supply water pipe 20a by use of an opening/closing valve 47 when a current value equal to or over a predetermined value is detected by the motor current detection circuit 61. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a mist generating device, and more particularly to a technique for detecting an abnormality in the amount of water in a water storage section based on a failure of a flow rate adjusting mechanism.

  Conventionally, a centrifugal mist generator that generates mist by supplying water to a water storage unit and rotating a rotating body to suck up water accumulated in the water storage unit and scatter it on a collision wall when a motor is operated is known. (For example, refer to Patent Document 1).

  By the way, if the amount of water supplied to the water storage unit is inappropriate, the water amount and water level of the water storage unit may not be stable, and there is a risk of water shortage or overflow. Therefore, in Patent Document 1, the amount of water supplied to the water storage unit is controlled using constant flow rate control means.

  However, if there is a failure in the constant flow control means, it becomes impossible to control the water supply to the water reservoir, and if the water level in the water reservoir increases, it will overflow from the mist discharge port and will not be misted. A situation occurs where water flows down into the bathroom.

Therefore, how to prevent an overflow due to the occurrence of a failure in the constant flow rate means is a very important issue.
JP 2008-261608 A

  The present invention has been invented in view of the above-mentioned conventional problems, and the problem is that a simple circuit structure detects water amount abnormality in the water storage section due to a failure of the flow rate adjustment mechanism and terminates water supply. An object of the present invention is to provide a mist generating device that can be used.

In order to solve the above-described problems, the present invention provides an inverted cone-shaped rotating body 34 that is rotated by a motor 6 to suck up water from below and scatter radially outward, and the radial direction of the rotating body 34. A substantially cylindrical collision plate 35 disposed oppositely to the outside, and the rotating body for storing a predetermined flow rate of water that opens to the water discharge side 45a of the water injection port 45 and flows down from the water discharge side 45a of the water injection port 45. A water storage portion 38 that leads to the lower end 50a side of the 34, and mist generated when the water scattered from the rotating body 34 collides with the collision plate 35 is interposed between the collision plate 35 and the water storage portion 38. The mist generating device 4 is configured to be discharged to the outside through a provided mist discharge port 37. An open / close valve 47 for opening and closing the water supply pipe 20a for supplying water to the water injection port 45 from the primary water supply side, and a flow rate adjusting mechanism 46 for adjusting the amount of water discharged from the water injection port 45 to a predetermined flow rate when the open / close valve 47 is open. The motor current detection circuit 61 for detecting the drive current of the motor 6 and the water supply for closing the water supply by closing the on-off valve 47 when the motor current detection circuit 61 detects a current value equal to or greater than a predetermined value D3. And a drain hole 52 at the bottom of the water storage section 38, and a lower end 50a of the rotating body 34 is rotatably inserted into the drain hole 52 with a predetermined gap therebetween. The predetermined value to be compared with the current value from the detection circuit 61 is the current value of the motor 6 that flows immediately before the water level in the water storage section 38 rises and starts to overflow from the mist discharge port 37, or As the amount of water in the water portion 38 increases, water is not sucked up by the rotating body 34 and the current value of the motor 6 that flows immediately before starting to drip from the gap between the lower end 50a of the rotating body 34 and the drain hole 52, whichever is lower. Nedea is characterized in Rukoto.

By adopting such a configuration, it is possible to detect an abnormality in the amount of water in the water storage section 38 due to a failure of the flow rate adjustment mechanism 46 by cooperation of the motor current detection circuit 61 and the water supply control circuit 62, and further close the on-off valve 47 to supply water. By ending, it becomes possible to prevent water that is not mist from overflowing from the mist discharge port 37 and dripping into the bathroom as the amount of water in the water reservoir 38 increases. Moreover, the water supply control circuit 62 only needs to determine whether or not the current value from the motor current detection circuit 61 is equal to or greater than the predetermined value D3, so that the circuit structure can be simplified. Further, a drain hole 52 is provided at the bottom of the water storage section 38, and the lower end 50a of the rotating body 34 is rotatably inserted into the drain hole 52 with a predetermined gap therebetween. The current from the motor current detection circuit 61 is The predetermined value to be compared with the value is the current value of the motor 6 that flows just before the water level in the water storage unit 38 rises and starts to overflow from the mist discharge port 37, or the water amount increases as the water amount in the water storage unit 38 increases. It is preferable that the current value of the motor 6 flowing immediately before starting to drip from the gap between the lower end 50a of the rotating body 34 and the drain hole 52 without being sucked up by the rotating body 34 is the lower value. After the operation is completed, the residual water in the water storage section 38 can be reduced as much as possible by the drain hole 52, and the water overflows from the mist discharge port 37 during the operation. Since the on-off valve 47 can be closed and the water supply can be terminated at the earlier of the stage just before the start and the stage just before the water starts to drip from the drain hole 52, not only the overflow of water that is not misted into the bathroom 13, Dripping from the drain hole 52 can also be prevented.

  The invention according to claim 1 is capable of detecting an abnormality in the amount of water in the reservoir due to a failure of the flow rate adjusting mechanism with a simple circuit structure.

Also, while preventing both dripping from overflow and drain hole from the mist outlet in advance, those capable of detecting water amount abnormality of the water reservoir.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  As shown in FIG. 10, the bathroom heater / dryer 1 with a mist sauna function of the present embodiment is installed on the ceiling of the bathroom 13 and supplies warm air to the bathroom 13 (bathroom air conditioner body). 2, a splash mist spraying device 3 that sprays mist in the bathroom 13, and a mist generating device 4. In FIG. 10, 14 is a heat source unit, and 15 is a remote control operation unit, which is provided with a splash mist operation switch, a mist operation switch, a heating operation switch, a ventilation operation switch, a drying operation switch, a cool air operation switch, and the like.

  As shown in FIGS. 8 and 9, the heater main body 2 includes a circulation fan 5, a heating heat exchanger 7 that heats the air ventilated by the circulation fan 5 with hot water supplied from a heat source unit 14, and A thermal valve 8 that adjusts the amount of hot water supplied to the heating heat exchanger 7 is housed in the device outer case 25. The heating heat exchanger 7 is disposed in the middle of the heating hot water conduit 16 through which the hot water from the heat source unit 14 circulates, and the heat from the circulation fan 5 is exchanged for heating by opening the thermal valve 8. It is heated by the vessel 7 and supplied into the bathroom 13 from the hot air outlet 30 below. Further, a mist heating hot water pipe 19 for heating a mist heat exchanger 11 to be described later is bypassed in the middle of the heating hot water pipe 16. The upstream end of the mist heating hot water pipeline 19 is branched and connected to the upstream position of the heating valve 8 of the heating hot water pipeline 16, and the downstream end of the mist heating hot water pipeline 19 is the heating of the heating hot water pipeline 16. The heat exchanger 7 joins the downstream position.

  A water supply pipe 20 for mist is accommodated in the equipment outer case 25 of the heater body 2. A mist heat exchanger 11 to be described later is disposed in the middle of the mist water supply pipe 20. The upstream side of the mist heat exchanger 11 is connected to an external water pipe via a water supply electromagnetic valve 22 and a strainer 23. The downstream of the mist water supply pipe 20 is connected to the mist nozzle 10 for spraying water for mist sauna via the first and second nozzle valves 29a and 29b. As described above, the mist water supply pipe 20, the mist heat exchanger 11, the water supply electromagnetic valve 22, the nozzle valves 29a and 29b, and the mist nozzle 10 constitute the splash mist spraying device 3.

  The mist nozzle 10 is disposed in the bathroom 13 from between the hot air outlet 30 and the inlet 27 provided on the lower surface side of the device outer case 25. In this example, three mist nozzles 10 are provided. For example, one mist nozzle 10a on the nozzle valve 29a side is for obtaining a mild mist sauna (a mist spray amount of, for example, 0.5 liter / min). The two mist nozzles 10b and 10c on the nozzle valve 29b side are for obtaining a hard mist sauna (mist spray amount is, for example, 1.0 liter / min).

  Further, as shown in FIG. 8, the mist water supply pipe 20 has a branch drainage channel 31 branched at a position downstream of the mist heat exchanger 11 and connected to an external drainage pipe via a drainage electromagnetic valve 24. For example, residual water accumulated in the mist heat exchanger 11 and the mist water supply pipe 20 at the start of mist operation can be drained to the outside.

  The mist heating hot water pipe 19 branched from the heating hot water pipe 16 is water for adjusting the amount of hot water discharged when the water temperature supplied to the mist heat exchanger 11 becomes appropriate. A proportional valve 12 and a warm water return temperature sensor 21 for detecting the return temperature of the circulating warm water from the mist heat exchanger 11 are installed. Further, a mist temperature sensor 18 for detecting the temperature of water discharged from the mist heat exchanger 11 is installed in the mist water supply pipe 20.

  The interior of the bathroom 13 is controlled to a predetermined temperature by a control unit (not shown). The control unit receives each detection signal from the bathroom temperature sensor 9, the hot water going-out temperature sensor 17, the mist temperature sensor 18, and the hot water return temperature sensor 21 in addition to the remote control signal instructed from the remote control operation unit 15. Based on the result, it is comprised by the microcomputer which drive-controls each component of the heater main body 2, the splash mist spraying apparatus 3, and the mist generating apparatus 4 mentioned later. In FIG. 8, 26 is a ventilation fan, 25a in FIG. 9 is a grill plate, 27 is a suction port, 28 is a movable louver, and 33 is an intake filter.

  Next, the mist generator 4 of the present invention will be described.

  As shown in FIG. 9, the mist generating device 4 is attached to an opening 32 provided at a position opposite to the air inlet 27 with the hot air outlet 30 of the device outer case 25 interposed therebetween.

  As shown in FIGS. 5 and 6, the mist generating device 4 includes a rotating body 34 that is rotationally driven by the motor 6, a collision plate 35 that is disposed so as to surround the rotating body 34, a mist discharge port 37, and a water storage unit 38. And the outer case 39 integrally provided with the main body. 6 is a drain guide plate that guides water droplets generated on the surface of the grill plate 25a into the mist discharge port 37.

  The outer case 39 is integrally formed using ABS resin, for example, by injection molding. The outer case 39 is fitted and fixed in the opening 32 provided on the grill plate 25a with the upper surface covered with the motor mounting plate 41. Yes.

  As shown in FIG. 5, the outer case 39 of the present example has a bowl shape that opens upward, and extends from the upper end to the lower end of the cylindrical collision plate 35 and the entire lower end of the collision plate 35. A slit-shaped mist discharge port 37, a dish-shaped water storage portion 38 continuous with the entire lower end of the mist discharge port 37, and a drain recovery portion 42 (FIG. 4) connected to the lower end of the water storage portion 38 are successively formed in this order. Yes. The drain collecting unit 42 is not shown in FIGS.

  As shown in FIG. 7A, the outer peripheral surface of the collision plate 35 is a cylindrical surface. On the inner peripheral surface of the collision plate 35, a plurality of ribs 43 extending upward from a mist discharge port 37 to be described later. The upper end portions 43a (FIG. 5) reach the respective ends. Each upper end portion 43a has a structure having a predetermined height radially inward and being spaced apart in the circumferential direction A.

  As shown in FIG. 7B, a plurality of ribs 43 extending in the vertical direction are arranged at intervals in the circumferential direction A in the mist discharge port 37, and a slit between the ribs 43, 43 is provided. Mist generated by the collision plate 35 is released from the space.

  Here, a slit space (mist discharge port 37) is not formed between two adjacent ribs 43, 43 of each rib 43, but instead, a resin wall constituting a wide mist water passage 44. It is filled with. The upper end of the water passage 44 for mist reaches the upper end of the inner surface of the collision plate 35.

  As shown in FIG. 5, a water discharge side 45 a of the water injection port 45 is disposed immediately above the wide mist water passage 44. In this example, an elongated cylindrical water injection port 45 passes through the motor mounting plate 41, the water discharge side 45 a of the water injection port 45 protrudes from the lower surface of the motor mounting plate 41, and is lower than the lower opening end of the mist discharge port 37. It is opened downward at a position higher than a predetermined dimension B (for example, 30 mm). The injection side 45b of the water injection port 45 protrudes from the upper surface of the motor mounting plate 41, and is branched from between the water supply electromagnetic valve 22 of the water supply pipe 20 for mist and the heat exchanger 11 for mist as shown in FIG. It is connected to the downstream end of the water supply pipe 20a. An on-off valve 47 and a governor 46a constituting the flow rate adjusting mechanism 46 are provided in the middle of the branch water supply pipe 20a.

  Here, the on-off valve 47 is constituted by an electromagnetic valve that is controlled to open and close by a signal from a controller 62a described later. Further, the governor 46a disposed downstream of the on-off valve 47 has a substantially constant flow rate on the downstream side (water inlet 45 side), even if the water pressure fluctuates on the upstream side (primary water supply side) of the on-off valve 47. For example, the flow rate is adjusted so that 50 [ml / min] can be taken out. As a result, the water supplied from the mist water supply pipe 20 to the branch water supply pipe 20a flows into the water injection port 45 via the on-off valve 47 and the governor 46a, and the mist water from the water discharge side 45a of the water injection port 45. It drops (or flows down) on the passage 44. In this example, the governor 46a is disposed on the downstream side of the on-off valve 47, but may be disposed on the upstream side. In addition to the governor 46a, for example, a commercially available constant flow pump or a flow rate adjusting mechanism such as a flow rate adjusting valve may be used.

  The lower end of the mist water passage 44 communicates with the upper end of the water reservoir 38 as shown in FIG. The water reservoir 38 functions to receive a predetermined flow rate of water flowing down from the mist water passage 44 and guide it to the lower end 50 a side of the water rising portion 50 of the rotating body 34. The water storage section 38 of this example is open to the water discharge side 45a of the water inlet 45, and has a dish shape with an angle α (FIG. 5) = 20 ° with respect to the horizontal and the center recessed downward. Yes.

  A drain hole 52 having a diameter C (approximately 15 mm) is opened at the bottom of the water storage section 38, and as shown in FIG. 4, the drain is recovered downward from the drain hole 52 with a predetermined gap d (about 4 mm). A portion 42 is provided. The drain collection part 42 has a shape like a shallow bowl with a dent toward the lower side, and the outer peripheral part is supported on the bottom side of the water storage part 38 via a plurality of (for example, four) support ribs 53. It is fixed. Moreover, the diameter F (FIG. 4) of the drain collection part 42 is slightly smaller than the diameter C (FIG. 5) of the drain hole 52 of the water storage part 38 for the reason of the metal mold | die for injection molding which forms the outer case 39. FIG. Is set to about 14.5 mm. The number of support ribs 53 and the size of the drain collecting portion 42 are not limited to the above numerical values, and can be changed as appropriate.

  On the other hand, the rotating body 34 is made of, for example, an SPS resin rotor, and the center of the rotating body 34 is connected to the drive shaft 6a of the motor 6 as shown in FIG.

  The rotating body 34 includes a water rising portion 50 having an inverted conical shape in which the radial dimension gradually increases from the lower end 50a toward the upper end, and a planar view disc protruding further outward in the radial direction from the upper end of the water rising portion 50. The shape water scattering part 51 is integrally formed.

  The lower end 50a of the water rising portion 50 is a flat surface in this example. The outer peripheral surface of the lower end 50a of the water rising portion 50 is rotatably inserted into the drain hole 52 of the water storage portion 38 with a gap H of about 1 mm. In the example of FIG. 5, the lower end 50 a of the water rising portion 50 protrudes from the drain hole 52 downward by a predetermined dimension G (3 mm).

  The water scattering portion 51 is formed into a thin plate shape in front view. The lower surface of the water scattering part 51 and the outer peripheral surface of the water rising part 50 are each covered with a coating film containing a hydrophilic material component. Examples of the hydrophilic material include silicon oxide, but the material components are not particularly limited. As a result, the water rising from the water rising portion 50 to the water scattering portion 51 does not easily become water droplets, and even if the rotating body 34 is rotated 6,000 rpm, that is, 100 rotations per second, generation of wind noise due to water droplets can be prevented. In addition, the water rising from the water rising portion 50 through the water scattering portion 51 can prevent the water from being scattered during the rising, and can efficiently generate mist.

  The water scattering portion 51 of the present example is arranged facing the vertical region of the inner peripheral surface of the collision plate 35, and the outer peripheral end of the water scattering portion 51 is separated from the collision plate by a predetermined gap. The plurality of ribs 43 existing on the inner peripheral surface 35 are arranged to face each other at the upper end portions 43a.

  In the present invention, as shown in FIG. 1, a motor drive circuit 60 that supplies a drive current to the motor 6, a motor current detection circuit 61 that detects a drive current value of the motor 6, and a motor current detection circuit 61 are provided. A controller 62a that constitutes a water supply control circuit 62 for closing the on-off valve 47 (FIG. 8) and ending the water supply when a current value equal to or greater than a predetermined value is detected.

  The controller 62a in this example outputs a drive signal to the motor drive circuit 60 and constantly monitors the current value input from the motor current detection circuit 61, and the current value exceeds a predetermined value D3. Sometimes, a circuit unit for outputting a signal for closing the on-off valve 47 and a timer unit for stopping the motor 6 after a predetermined time has elapsed after the on-off valve 47 is closed are provided. For example, the timer time is determined in anticipation of the elapsed time from when the on-off valve 47 is closed until the water in the water storage section 38 is sucked up without remaining in the rotating body 34, and is set to about 1 minute, for example.

  An example of the predetermined value D3 of the motor current is shown in FIG. The horizontal axis in FIG. 2 indicates the water level of the water storage section 38, and the vertical axis indicates the current value of the motor 6. L0 is the water level, L1 is the lower limit water level, L2 is the upper limit water level, D is the current value of the motor 6 when the water level is zero (L0), D1 is the steady current value when the lower water level is L1, and D2 is the upper limit The allowable maximum current value at the water level L2 is shown. Here, the lower limit water level L1 is a water level (see L1 in FIG. 4) when mist is generated from the governor 46a with a substantially constant amount of water (50 ml / min in the present embodiment), and the upper limit water level L2 is stored water. This is the water level (see L2 in FIG. 4) immediately before the water in the section 38 increases and begins to overflow from the mist discharge port 37. D3 is an arbitrary value (for example, an intermediate value) between the steady current value D1 and the allowable maximum current value D2, and is set in advance as a reference value to be compared with the current value from the motor current detection circuit 61. Note that D3 is arbitrarily set within a range between D1 and D2.

  Next, an operation example will be described.

  First, in order to increase the temperature of the bathroom, a splash mist operation is performed in which the heat transfer capacity is high and the bathroom temperature rise performance is good. The water droplet sprayed here is a splash mist having a particle size of about 50 to 100 μm.

  When the splash mist operation switch of the remote control operation unit 15 is pressed, a signal for instructing the start of the operation of the splash mist sauna is sent to the control unit, and an operation signal is sent to the heat source unit 14 (FIG. 10) for supplying hot water. Start driving. Next, the hot air-side thermal valve 8 and the mist-side water proportional valve 12 shown in FIG. 8 are opened, and the circulating hot water at 80 ° C. circulates in the heating hot water pipe 16 and the mist heating hot water pipe 19. Begin to. Next, when the temperature of the warm water reaches 60 ° C. or higher, the circulation fan 5 is turned on and warm air is sent to the bathroom 13. Thereafter, when the bath temperature becomes 25 ° C. or higher, the water supply electromagnetic valve 22 constituting the water supply means is opened and both or one of the nozzle valves 29a and 29b is opened, and the spray mist spraying is started from the mist nozzle 10.

  After that, if you want to relax during bathing, perform mist driving.

  FIG. 3 shows a flowchart of the mist operation. When the operation is turned on in step n1 in FIG. 3, a signal for instructing the controller 62a to start the mist sauna operation is sent. The controller 62a turns on the motor 6 to rotate the rotating body 34 (step n2). Next, the on-off valve 47 is opened (step n3). As a result, water having a flow rate of 50 [ml / min] supplied from the governor 46a is dripped from the water inlet 45 and travels through the wide mist water passage 44 positioned just below the water inlet 45, in the direction of the arrow W1 in FIG. In this way, the water flows down to the water storage section 38 and wets the vicinity of the lower end 50a of the water rising section 50 of the rotating body 34. At this time, since the rotating body 34 is rotating at a high speed of about 6,000 rpm, centrifugal force acts on the water W that wets the vicinity of the lower end 50a of the water rising portion 50 and tries to leave the center of the rotating body 34. However, since the rotator 34 is hydrophilic, water does not leave the rotator 34, and water does not leave the rotator 34. Without dropping from the H portion in FIG. 5, the water rises from the water rising portion 50 to the lower surface of the water scattering portion 51 and finally scatters outward from the outer periphery of the water scattering portion 51, The upper end portions 43a of the plurality of ribs 43 existing on the inner surface of 35 are smashed, shredded and crushed to generate a fine mist-like mist M (FIG. 4), which is discharged into the bathroom from the mist discharge port 37. The Since the mist M generated at this time is refined to a particle size of about 20 μm, there is no sensation when attached to the human body, and a comfortable mist sauna can be experienced during bathing.

  During generation of the mist M, the current value detected by the motor current detection circuit 61 is constantly monitored by the controller 62a (step n4 in FIG. 3). At this time, when the governor 46a is operating normally, the balance between the water supply amount and the mist discharge amount is maintained, and the current value detected by the motor current detection circuit 61 is not more than a predetermined value D3. The normal value is maintained.

  By the way, it is a load on the motor 6 to drive the rotating body 34 to suck up and spray the water accumulated in the water storage section 38 by the rotating body 34. However, if the governor 46a for flow rate adjustment breaks down, the water storage section 38 is temporarily damaged. When the water level of the water W continues to increase, the load on the motor 6 increases and the drive current of the motor 6 increases. When the current value detected by the motor current detection circuit 61 exceeds a predetermined value D3, the controller 62a determines that the governor 46a has failed, sends a signal to close the on-off valve 47, and the on-off valve 47 Is closed (step n5 in FIG. 3). Thereafter, after one minute has elapsed, the motor 6 is stopped (step n6). When a failure of the governor 46a is detected, the occurrence of the failure may be displayed on the remote controller or the like.

  Thus, the malfunction of the governor 46a is determined by the cooperation of the motor current detection circuit 61 and the controller 62a configured as described above, and the on-off valve 47 is automatically closed, so that the water that is not mist is stored in the water storage section 38. It is possible to prevent a situation in which the liquid overflows from 37 and drops into the bathroom 13. In addition, the controller 62a only needs to determine whether or not the current value from the motor current detection circuit 61 is equal to or greater than a predetermined value D3, and there is an advantage that the circuit structure can be simplified.

  Further, in this example, the value D3 to be compared with the current value from the motor current detection circuit 61 is set to be higher than the steady current value D1, so that a substantially constant amount of water (50 ml / min in this embodiment) from the governor 46a. When the mist is generated normally, there is an advantage that the on-off valve 47 is not closed and the mist operation is not stopped.

  In addition, since the stop timing of the motor 6 is set to a certain time after the opening / closing valve 47 is closed, the mist spraying is continued even after the water supply is stopped, so that no water remains in the water storage section 38. Even if water remains in the water storage unit 38, this water is received by the drain recovery unit 42, so that it does not drop into the bathroom.

  In this example, the water discharge side 45a of the water injection port 45 is opened at a position higher than the lower opening of the mist discharge port 37 by a predetermined dimension B (for example, 30 mm) or more. This also has the advantage of facilitating so-called water supply cross-connection countermeasures.

(Example 1)
In the above embodiment, the current value flowing through the motor 6 at the upper limit water level L2 immediately before the overflow is the allowable maximum current value D2, but as another example, the current value immediately before the overflow and the increase in the amount of water in the reservoir 38 It is also possible to compare the current value of the motor 6 immediately before the water starts to drip from the drain hole 52 without being sucked up by the rotating body 34, and the lower one may be set as the allowable maximum current value D2. Incidentally, in the case where the drain hole 52 is provided, when the amount of water in the water storage section 38 increases, the water starts to drip from the drain hole 52 without being sucked up by the rotating body 34. Therefore, in this example, the lower of the current value just before the overflow and the current value just before water starts to drip from the drain hole 52 is set as the allowable maximum current value D2, and the current value lower than the allowable maximum current value D2 Is a predetermined value D3 to be compared with the current value from the motor current detection circuit 61. As a result, the on-off valve 47 is closed at an earlier stage than the occurrence of overflow from the mist discharge port 37 and dripping from the drain hole 52, so that the water supply can be terminated. As a result, while preventing overflow or dripping, respectively. There is an advantage that an abnormal amount of water in the water storage section 38 can be detected.

(Another embodiment 2)
As another example, the current value of the motor 6 is continuously detected even after the on-off valve 47 is closed, and when the current value becomes lower than the steady current value D1 (current value of the motor 6 at the lower limit water level L1 of the water storage unit 38). 6 may be stopped. In this case, since the amount of water in the water storage unit 38 is lower than the lower limit water level L1, the water storage unit 38 is easily dried after the operation is completed, and an effect of preventing generation of various germs can be obtained. .

(Example 3)
In the above embodiment, the governor 46a is used as the flow rate adjusting mechanism 46, and the predetermined flow rate flowing down to the water storage unit 38 is set to a substantially constant flow rate, but the predetermined flow rate flowing down from the flow rate adjustment mechanism 46 to the water storage unit 38 is made variable. It is good also as a structure which can increase / decrease the amount of mist generation.

It is a block diagram which shows the controller of the mist generator of one Embodiment of this invention, a motor current detection circuit, a motor drive circuit, and an on-off valve. It is a graph which shows the relationship between the electric current value of a motor same as the above, and the water level of a water storage part. It is a flowchart of a mist driving | operation same as the above. It is explanatory drawing of the state which mist sprays from the mist discharge port of a mist generator same as the above. It is front sectional drawing which shows a mist generator same as the above. It is the perspective view which looked at the bathroom heating dryer with a mist generating function which comprised the same mist generator from the bottom. (A) is a front view of the mist generator same as the above, (b) is a bottom view. It is a piping diagram of a bathroom heating dryer provided with the same mist generator. It is sectional drawing explaining the internal structure of FIG. It is explanatory drawing of the state which installed the bathroom heating dryer provided with a mist generator same as the above on the bathroom ceiling.

Explanation of symbols

4 Mist Generator 6 Motor 20a Water Supply Pipe 34 Rotating Body 35 Collision Plate 37 Mist Discharge Port 38 Water Reserving Portion 45 Water Inlet 45a Water Discharge Side 46 Flow Control Mechanism 47 Opening / Closing Valve 50a Rotating Body Lower End 52 Drain Hole 61 Motor Current Detection Circuit 62 Water Supply Control circuit D3 Predetermined value

Claims (1)

An inverted conical rotator that rotates by a motor to suck up water from below and scatters radially outward, a cylindrical collision plate that is arranged to face radially outward of the rotator, and a water inlet A water storage part that is opened to a space facing the water discharge side and accumulates a predetermined flow rate of water that flows down from the water discharge side of the water injection port and guides it to the lower end side of the rotating body, and the water scattered from the rotating body collides with the water A mist generating device configured to discharge mist generated by colliding with a plate to the outside through a mist discharge port provided between the collision plate and the water storage unit, from a water supply primary side An on-off valve that opens and closes a water supply pipe that supplies water to the water injection port, a flow rate adjustment mechanism that adjusts the amount of water discharged from the water injection port to a predetermined flow rate when the on-off valve is open, and a motor that detects the drive current of the motor The current detection circuit and the motor current detection circuit Close the on-off valve comprises a water supply control circuit to end the water supply upon detection of a meta value or current value, the drain hole of the lower end of the rotary body provided with a drain hole in the bottom of the reservoir A predetermined value that is inserted rotatably with a predetermined gap and compared with the current value from the motor current detection circuit is immediately before the water level in the water storage unit rises and starts to overflow from the mist discharge port. The lower value of the current value of the motor that flows, or the current value of the motor that flows immediately before the water starts to drip from the gap between the lower end of the rotating body and the drain hole without being sucked up by the rotating body as the amount of water in the reservoir increases mist generating device according to claim value der Rukoto.

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