JP2016031229A - Fan assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fan assembly capable of preventing water, which falls on to a motor housing of a body if a nozzle has been removed from the body, from reaching a motor or bearing.SOLUTION: A fan assembly includes a body and a nozzle connected to the body. The body includes an impeller, a motor housing, and a motor located within the motor housing for driving the impeller. The impeller has a substantially conical hub connected to the motor, a plurality of curved vanes connected to an outer surface of the hub, and an annular vane connected to a base of the hub. The motor housing has an annular groove for receiving at least a tip of the annular vane, and an annular lip forming a drip edge extending about the motor housing, the annular lip defining an outer peripheral wall of the groove.SELECTED DRAWING: Figure 14(c)

Description

  The present invention relates to a fan assembly. In a preferred embodiment, the present invention provides a humidifying device for generating a humid air stream and an air stream that disperses the humid air in a home environment such as a room or office.

  In general, a home humidifier takes the form of a portable device having a casing containing a water tank for storing a predetermined amount of water and a fan for creating an air flow through the air duct of the casing. The accumulated water is conveyed by gravity to an atomizer for generating water droplets from the received water. The atomizer can take the form of a high frequency vibration device such as a heater or a transducer. The water droplets enter the air stream that passes through the air duct, which causes mist to be released into the environment. The instrument can include a sensor for detecting the relative humidity of the air in the environment. This sensor outputs a signal indicative of the detected relative humidity to the drive circuit, which controls the transducer to maintain the relative humidity of the air in the environment near a desired level. Normally, the converter stops operating when the detected relative humidity is about 5% higher than the desired level, and restarts when the detected relative humidity is about 5% lower than the desired level.

  It is known to provide an ultraviolet (UV) lamp or other UV radiation generator to sterilize the water carried to the atomizer. For example, US Pat. No. 5,859,952 describes a humidifier in which water supplied from a tank passes through a sterilization chamber before being piped to a chamber containing an ultrasonic atomizer. The sterilization chamber has a UV transmissive window, and a UV lamp for irradiating water when passing through the sterilization chamber is disposed below the sterilization chamber. In US Pat. No. 7,540,474, in a humidifier, a water tank includes a UV transparent tube for carrying water to the outlet of the water tank, and the main body to which the tank is attached is water It is described to include a UV lamp that irradiates as it travels through the tube towards the outlet.

  WO2013 / 132222 describes a humidifier comprising a main body and an annular nozzle removably attached to the main body. The body includes a base and a water tank removably attached to the base. An electric impeller present in the base draws an air flow into the humidifier through an air inlet present in the outer casing of the base. A first air passage located downstream of the impeller carries a first portion of the air flow to a first annular internal passage in the nozzle. A first portion of the air flow is discharged from the first air outlet of the nozzle. A second air passage located downstream of the impeller carries a second portion of the air flow above a water reservoir that receives water from the water tank. A transducer present in the water reservoir atomizes the water accumulated in the water reservoir and humidifies the second portion of the air flow. An outlet duct defined by a water tank carries this humidified air stream to the second annular internal passage of the nozzle. The humidified air stream is discharged from the second air outlet of the nozzle so as to be accompanied by the air released from the first air outlet of the nozzle.

  The base has a relatively wide cylindrical outer wall, a relatively narrow cylindrical inner wall located coaxially above the outer wall, and a recessed annular wall extending between the inner and outer walls. These base walls define a water reservoir that becomes exposed when the water tank is removed from the base. The water reservoir is adapted to irradiate the UV transmission tube containing a UV lamp for irradiating the water accumulated in the interior, and the water entering the water reservoir from the water tank by the UV lamp before being atomized by the transducer. And a baffle plate for guiding the tube upward. The water tank is annular and is attached to the annular wall of the base so as to surround the inner wall of the base by the user. The base includes a proximity sensor for detecting that a water tank is attached to the base. The drive circuit stops the motor, UV lamp and converter in response to receiving a signal from the proximity sensor indicating that the water tank has been removed from the base.

  To refill the water tank, the user removes the nozzle from the base and lifts the water tank from the base. A discharge port is screwed to the lower wall of the water tank. The user turns the water tank upside down so that the discharge port protrudes upward, unscrews the discharge port from the water tank to expose the opening, and fills the water tank through the exposed opening. When the water tank is filled, the user connects the discharge port again, returns the water tank to a non-inverted orientation, and returns the water tank to the base.

US Pat. No. 5,859,952 US Pat. No. 7,540,474 International Publication No. 2013/132222

A fan assembly provided by the present invention includes a main body and a nozzle connected to the main body.
Impeller,
A motor housing;
A motor located within the motor housing for driving the impeller to generate an air flow through the body to the nozzle;
The nozzle has at least one air outlet for discharging the air flow;
The impeller has a substantially conical hub connected to the motor, a plurality of curved blades connected to the outer surface of the hub, and an annular blade connected to the base of the hub;
The motor housing has an annular groove for receiving at least the tip of the annular blade and an annular lip portion forming a drip edge extending around the motor housing, the annular lip portion defining an outer peripheral wall of the groove. .

  By providing an annular drop edge extending around the motor housing, any water that falls onto the motor housing of the body, for example when the nozzle is removed from the body, passes between the impeller and the motor housing to the motor, or It is possible to prevent reaching a bearing for supporting the impeller so that it can rotate with respect to the motor housing. During use of the fan assembly, rotation of the annular blade relative to the motor housing creates an air boundary adjacent to the drip edge that further inhibits water from passing between the impeller and the motor housing. To do.

  The annular blade is preferably substantially cylindrical. The annular groove is preferably formed in a substantially frustoconical wall of the motor housing located adjacent to the impeller hub. In order to minimize the disruption of the air flow caused by the impeller rotation, the annular lip preferably does not protrude downwardly from the motor housing beyond the impeller hub.

  Embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings.

It is a front perspective view of a humidifier. It is a front view of a humidifier. It is a rear view of a humidifier. It is side surface sectional drawing of the humidification apparatus cut along line AA of FIG. It is an enlarged view of the 1st part of Fig.4 (a). It is an enlarged view of the 2nd part of Fig.4 (a). It is an enlarged view of the 3rd part of Fig.4 (a). It is front sectional drawing of the humidification apparatus cut off along line BB of Fig.4 (a). FIG. 5 is an enlarged view of a part of FIG. It is a front view of the nozzle of a humidifier. FIG. 6 is a bottom cross-sectional view taken along line CC in FIG. FIG. 6 is an enlarged view of a part of FIG. It is the rear surface perspective view of the nozzle seen from the downward direction. It is a rear view of a nozzle. It is an enlarged view of the range D of FIG.6 (b). It is a rear view of the nozzle which removed a part of nozzle housing. It is an enlarged view of the range E of Fig.7 (a). It is a front view of the base of a humidifier. It is a front perspective view of the base seen from the upper part. It is a top view of a base. It is sectional drawing cut along line KK of FIG.8 (c). It is a front perspective view of the water tank of the humidifier as seen from above. It is a front perspective view of the water tank seen from the bottom. It is a rear surface perspective view of the water tank seen from the upper part. It is a front perspective view of the removable part of a water tank seen from the upper part. It is a bottom view of the removable part of a water tank. It is a top view of the removable part of a water tank. It is a front perspective view of the removable part of a water tank seen from the lower part. It is a rear surface perspective view of the removable part of the water tank seen from the bottom. It is a front view of the base where the removable part of the water tank is arranged on the upper part. It is the front perspective view seen from the upper part of the base with which the removable part of the water tank is arrange | positioned at the upper part. It is a top view of the base where the removable part of the water tank is arranged on the upper part. It is sectional drawing cut along line LL of FIG.11 (c). It is a perspective view of the impeller of the humidification device seen from the top. It is a perspective view of the motor housing of the humidification device seen from the lower part. It is a top view of the impeller of a humidifier, and a motor housing. It is sectional drawing cut along line JJ of Fig.14 (a). It is an enlarged view of the range H of FIG.14 (b). It is a front perspective view of the base seen from the lower part. It is the same figure as Drawing 15 (a) which removed the bottom wall of the base. It is the same figure as FIG.15 (b) which removed the panel for interrupting | blocking a drive circuit from the penetration | invasion of water. It is a top view of a panel. It is a bottom view of a panel. It is the rear surface perspective view of the panel seen from the downward direction. It is a rear surface perspective view of the panel seen from the upper part. It is the schematic of the control system of a humidifier.

  1 to 3 are external views of the fan assembly. In this example, the fan assembly takes the form of a humidifier 10. In general, the humidifier 10 includes a body 12 including an air inlet through which air entering the humidifier 10 passes, and a nozzle 14 in the form of an annular casing attached to the body 12, the nozzle 14 being a humidifier 10. A plurality of air outlets for releasing air from the air outlet.

  The nozzle 14 is arranged to emit two different air streams. The nozzle 14 includes a rear portion 16 and a front portion 18 connected to the rear portion 16. Each portion 16, 18 is annular and extends around the bore 20 of the nozzle 14. The bore 20 extends through the center of the nozzle 14 such that the center of each portion 16, 18 is located on the axis X of the bore 20.

  In this example, each portion 16, 18 is curved to connect two generally straight portions located on either side of the bore 20, a curved upper portion connecting the upper ends of the straight portions, and a lower end of the straight portions. It has a “race track” shape in that it includes a lower portion. However, the portions 16, 18 can have any desired shape, for example circular or oval. In this embodiment, the height of the nozzle 14 is larger than the width of the nozzle, but the nozzle 14 may be configured such that the width is larger than the height of the nozzle.

  Each portion 16, 18 of the nozzle 14 defines a flow path through which one of the air streams passes. In this embodiment, the rear portion 16 of the nozzle 14 defines a first air flow path through which a first air flow passing through the nozzle 14 and a front portion 18 of the nozzle 14 passes through the nozzle 14. The second air flow path through which the air flow passes is defined.

  As can also be seen with reference to FIGS. 4 (a) to 5 (c), the rear portion 16 of the nozzle 14 includes an annular outer casing portion 22 connected to and extending around the annular inner casing portion 24. Each casing portion 22, 24 extends around the bore axis X. Each casing part can also be formed from a plurality of connecting parts, but in this embodiment each casing part 22, 24 is formed from a respective single molded part. Each casing portion 22, 24 is preferably formed of a plastic material. As shown in FIG. 5 (c), the front portion of the inner casing portion 24 includes an annular outer wall 24a that extends substantially parallel to the bore axis X, a front end wall 24b, and a vertical end that extends substantially perpendicular to the bore axis X. An annular intermediate wall 24c that connects the outer wall 24a to the end wall 24b so that 24b is located in front of the intermediate wall 24c. During assembly, the outer surface of the outer wall 24a is connected to the inner surface of the front end of the outer casing portion 22 using, for example, an adhesive.

  The outer casing portion 22 includes a tubular base 26 that defines a first air inlet 28 of the nozzle 14. Both the outer casing portion 22 and the inner casing portion 24 define a first air outlet 30 of the nozzle 14. As described in more detail below, the first air stream enters the nozzle 14 through the first air inlet 28 and is discharged from the first air outlet 30. The first air outlet 30 is defined by overlapping or facing a portion of the inner surface 32 of the outer casing portion 22 and a portion of the outer surface 34 of the inner casing portion 24. The first air outlet 30 takes the form of a slot. This slot has a relatively constant width of 0.5-5 mm. In this example, the first air outlet has a width of about 1 mm. A spacer 36 for controlling the width of the first air outlet 30 by energizing the overlapping portion of the outer casing portion 22 and the inner casing portion 24 apart from each other around the first air outlet 30. Can be arranged. These spacers can be integrated with either of the casing portions 22, 24.

  In this embodiment, the first air outlet 30 extends partially around the bore 20. The first air outlet 30 extends along the curved upper and straight portions of the nozzle 14. However, the first air outlet 30 can also extend around the entire circumference of the bore 20. As shown in FIG. 4A, the nozzle 14 includes a sealing member 38 for suppressing the first air flow from being released from the curved lower portion of the nozzle 14. In this embodiment, the seal member 38 is substantially U-shaped and is held by a recess formed in the rear end of the inner casing portion 24 so as to be located in a plane substantially perpendicular to the axis X. The seal member 38 engages with a U-shaped protrusion 39 that extends forward from the rear end of the curved lower portion of the outer casing portion 22 to form a seal with the protrusion 39.

  The first air outlet 30 is arranged to discharge air through the front portion of the bore 20 of the nozzle 14. The first air outlet 30 is shaped to induce air on the outer surface of the nozzle 14. In this embodiment, the outer surface 34 of the inner casing portion 24 includes a Coanda surface 40 and the first air outlet 30 is arranged to induce a first air flow on the Coanda surface 40. The Coanda surface 40 is annular and is therefore continuous around the central axis X. The outer surface 34 of the inner casing portion 24 also includes a diffusing portion 42 that tapers away from the axis X in a direction extending from the first air outlet 30 to the end wall 24b of the inner casing portion 24.

  The casing portions 22, 24 together define an annular first internal passage 46 for carrying a first air flow from the first air inlet 28 to the first air outlet 30. The first internal passage 46 is defined by the inner surface of the outer casing portion 22 and the inner surface of the inner casing portion 24. The first air flow is directed to the first air outlet 30 by a tapered annular mouth portion 48 in the rear portion 16 of the nozzle 14. Accordingly, it can be considered that the first air inlet 28, the first internal passage 46, the mouth portion 48, and the first air outlet 30 form a first air passage through the nozzle 14.

  The front portion 18 of the nozzle 14 includes an annular front casing portion 50. The front casing portion 50 extends around the bore axis X and has a “track race” shape similar to the other casing portions 22, 24 of the nozzle 14. The front casing portion 50 can be formed by a plurality of connecting parts in the same manner as the casing portions 22 and 24. In this embodiment, the front casing portion 50 is formed by a single molded part. The front casing part 50 is preferably formed of a plastic material.

  The front casing portion 50 includes an annular outer wall 50a extending substantially parallel to the bore axis X and an annular inner wall 50b connected to the outer wall 50a at the front end portion 44 of the nozzle 14. The inner wall 50b forms an angle with the outer wall 50a so as to be tapered toward the axis X. During assembly, the front casing portion 50 is attached to the inner casing portion 24 using a series of snap connections, for example, between the front wall 50a of the front casing portion 50 and the intermediate wall 24c of the inner casing portion 24. An annular seal member 52 forms an airtight seal between the inner casing portion 24 and the front casing portion 50.

  Referring to FIG. 6 (a), a tubular base portion 56 is provided at the lower end portion of the front casing portion 50. Base 56 defines a second air inlet 58 of nozzle 14. The front casing part 50, together with the inner casing part 24, defines a second air outlet 60 for the nozzle 14. In this example, the second air outlet 60 extends partially around the bore 20 along the curved upper and straight portions of the nozzle 14. Alternatively, the second air outlet 60 can extend around the entire circumference of the bore 20. As another example, the nozzle 14 can include a plurality of second air outlets, with each linear portion of the nozzle 14 including a respective second air outlet.

  In this embodiment, the second air outlet 60 takes the form of a slot having a relatively constant width of 0.5-5 mm. In this example, the second air outlet 60 has a width of about 1 mm. The second air outlet 60 is located between the end wall 24 b of the inner casing portion 24 and the inner wall 50 b of the front casing portion 50. Along the second air outlet 60, the spacer 62 is separated so as to control the width of the second air outlet 60 by urging the overlapping portion of the inner casing portion 24 and the front casing portion 50 apart. Can be arranged. These spacers can be integrated with either casing portion 24, 50. The second air outlet 60 emits a second air flow into the bore 20 of the nozzle 14, preferably towards the axis X of the nozzle 14, more preferably in a plane perpendicular to the axis X of the nozzle 14. Configured.

  The casing portions 24, 50 together define an annular second internal passage 68 for carrying a second air flow from the second air inlet 58 to the second air outlet 60. The second internal passage 68 is defined by the inner surface of the inner casing portion 24 and the inner surface of the front casing portion 50. Therefore, it can be considered that the second air inlet 58, the internal passage 68 and the second air outlet 60 form a second air flow path through the nozzle 14.

  Referring again to FIGS. 1-3, the body 12 is generally cylindrical. The main body 12 includes a base 70. The base 70 is shown in more detail in FIG. Base 70 includes a cylindrical outer outer wall 71 that includes an air inlet 72. In this example, the air inlet 72 includes a plurality of openings formed in the outer wall 71 of the base 70. The front portion of the base 70 can include the user interface of the humidifier 10. This user interface is shown schematically in FIG. 17 and described in detail below, and includes at least one switch or button 73 operable by the user and a drive circuit 74. The drive circuit is indicated generally at 74 in FIGS. 4 (a) and 4 (d). In FIG. 18, the drive circuit 74 is shown as a single element, but the drive circuit 74 can include a respective processor for controlling various different components or functions of the humidifier 10. It can also be formed by a plurality of sub-circuits that are physically separated but electrically connected to each other. The drive circuit 74 has a removable main power cable (not shown) for supplying power to the humidifier 10 via a connector 75a existing behind an opening 75b formed in the outer wall 71 of the base 70. Is connected. To connect the drive circuit 74 to the main power supply unit, the user inserts a cable into the opening 75b and connects it to the connector 75a.

  Referring also to FIGS. 4 (a), 4 (d), 4 (e) and FIG. 8, the base 70 is a first for carrying a first air flow into a first air flow path through the nozzle 14. Air passage 76 and a second air passage 78 for carrying a second air flow to a second air flow path through the nozzle 14. The first air passage 76 passes from the air inlet 72 through the base 70 to the first air inlet 28 of the nozzle 14. Base 70 includes a bottom wall 80 connected to the lower end of outer wall 71. On the upper surface of the bottom wall 80, a silencer foam sheet 81 is disposed. A tubular central wall 82 having a smaller diameter than the outer wall 71 is connected to the outer wall 71 by an arcuate support wall 84. The central wall 82 is substantially coaxial with the outer wall 71. The support wall 84 is located above the bottom wall 80 and substantially parallel to the bottom wall 80. As described in more detail below, the support wall 84 extends partially around the central wall 82 and defines an opening for exposing the water reservoir 140 of the base 70. The central wall 82 extends away from the support wall 84. In this example, the outer wall 71, the central wall 82, and the support wall 84 are formed as a single component of the base 70, but two or more of these walls are the respective components of the base 70. It can also be formed. The upper wall of the base 70 is connected to the upper end of the central wall 82. The upper wall has a lower frustoconical portion 86 and an upper cylindrical portion 88. The upper cylindrical portion has a double wall that includes an outer cylindrical wall 88a connected to the frustoconical portion 86 and an inner cylindrical wall 88b into which the base 26 of the nozzle 14 is inserted. These walls 88a, 88b define an annular housing 88c within the upper cylindrical portion of the base 70.

  The central wall 82 extends around the impeller 90 for generating a first air flow through the first air passage 76. In this example, the impeller 90 takes the form of a mixed flow impeller. In brief, the impeller 90 is connected to a rotating shaft for driving the impeller 90 that extends outward from the motor 92. In this embodiment, the motor 92 is a DC brushless motor having a speed that is variable by the drive circuit 74 in response to a speed selection by the user. The maximum speed of the motor 92 is preferably 5,000 to 10,000 rpm. The motor 92 is housed in a motor bucket that includes a dome-shaped upper portion 96 connected to the lower portion 98. A set of guide vanes 100 that guides air toward the first air outlet 28 of the nozzle 14 is connected to the upper surface of the upper portion 96 of the motor bucket. Further features of the impeller 92 and the motor bucket are described below.

  The motor bucket is located within and attached to the impeller housing 104 having a generally frustoconical shape. Further, the impeller housing 104 is attached to an annular platform 106 that extends inwardly from the central wall 82. An annular inlet member 108 for guiding an air flow into the impeller housing 104 is connected to the bottom of the impeller housing 104. An annular seal member 110 is located between the impeller housing 104 and the platform 106 to prevent air from passing through the periphery of the outer surface of the impeller housing 104 to the inlet member 108. The platform 106 preferably includes a guide for guiding the electrical cable 107 from the drive circuit 74 to the motor 92.

  The first air passage 76 extends from the air inlet 72 to the inlet member 108. Further, the first air passage 76 extends from the inlet member 108 through the impeller housing 104, the upper end of the central wall 82, and the upper wall portions 86, 88. A frustoconical baffle 109 a connected to the inner surface of the upper wall portions 86, 88 serves to guide the first air flow emitted from the impeller housing 104 to the base 26 of the nozzle 14. An annular seal 109b extending around the upper end of the baffle 109a engages the end of the base 26 of the nozzle 14 to form an airtight seal between the nozzle 14 and the base 70.

  The second air passage 78 is arranged to receive air from the first air passage 76. The second air passage 78 is disposed adjacent to the first air passage 76. The second air passage 78 includes a duct 110 for receiving air from the first air passage 76. The duct 110 has an annular inlet port 112 located downstream of the guide vane 100 so as to form a second air flow by receiving a portion of the air flow emitted from the guide vane 100. The inlet port 112 is located between the baffle 109 a and the dome-shaped upper portion 113 of the impeller housing 104. The duct 110 extends between the impeller housing 104 and the baffle 109a to an outlet port 114 present in the central wall 82 of the base 70.

  The humidifier 10 is configured to increase the humidity of the second air stream before the second air stream enters the nozzle 14. Referring now to FIGS. 1-4 and 9-11, the humidifier 10 includes a water tank 120 that can be removably attached to the base 70 of the body 12. The water tank 120 has a cylindrical outer wall 122 having the same radius as the outer wall 71 of the base 70 of the main body 12 so that the main body 12 has a cylindrical appearance when the water tank 120 is attached to the base 70. The water tank 120 has a tubular inner wall 124 that surrounds the walls 82, 86, 88 of the base 70 when attached to the base 70. The outer wall 122 and the inner wall 124 together with the annular upper wall 126 and the annular lower wall 128 of the water tank 120 define an annular volume for storing water. Accordingly, the water tank 120 surrounds the impeller 90 and the motor 92 and thus at least a portion of the first air passage 76 when attached to the base 70.

  The outer wall 122 is formed of a material that transmits visible light so that a user can observe the amount of water stored in the water tank 120. For the same reason, the upper wall 126 is also preferably formed of the same material as the outer wall 122. The outer wall 122 and the upper wall 126 can be connected using an adhesive or a laser welding method. These walls 122, 126 are preferably formed of a permeable plastic material. Inner wall 124 and lower wall 128 are preferably integral and need not be formed of the same plastic material as outer wall 122 and upper wall 126. In this embodiment, when the water tank 120 is attached to the base 70, the inner wall 124 and the lower wall 128 are such that the portion of the base 70 surrounded or covered by the inner wall 124 and the lower wall 128 is not visible to the user. It is formed of a material that does not pass ultraviolet radiation, and preferably does not pass visible light. An adhesive is used to connect the inner wall 124 to the upper wall 126 and to connect the outer wall 122 to the lower wall 128.

  When the water tank 120 is attached to the base 70, the lower wall 128 of the water tank 120 engages with the support wall 84 of the base and is supported by the support wall 84. The lower wall 128 is formed with a protrusion 130 for placement in a recess 132 formed on the support wall 84 of the base 70 to ensure that the water tank 120 is positioned on the base 70 at an accurate angle or Can be installed. The protrusion 130 assists in accurately positioning the water tank 120 on the base 70 and also increases the force required to move the water tank 120 relative to the base 70 so that the recess 132 on the lower surface of the support wall 84 is It takes the form of a magnet that interacts with other magnets (not shown) mounted below. Thereby, the risk that the water tank 120 will move unintentionally with respect to the base 70 can be reduced.

  The water tank 120 preferably has a capacity of 2 to 4 liters. As can be seen in particular with reference to FIGS. 9 (b) and 9 (c), a discharge port 134 is removably connected to the lower wall 128 of the water tank 120, for example, by a cooperating screw connection. In this example, the water tank 120 is filled by removing the water tank 120 from the base 70 and inverting the water tank 120 so that the discharge port 134 protrudes upward. Next, the discharge port 134 is untwisted from the water tank 120, and water is injected into the water tank 120 through an opening that is exposed when the discharge port 134 is removed from the water tank 120. The discharge port 134 preferably includes a plurality of radial fins for facilitating gripping of the discharge port 134 and twisting of the water tank 120. When the water tank 120 is full, the user reconnects the outlet 134 to the water tank 120, returns the water tank 120 to a non-inverted orientation, and returns the water tank 120 onto the base 70. Within the discharge port 134 is a spring biased valve 136 to prevent water from leaking through the water outlet of the discharge port 134 when the water tank 120 is inverted again. The valve 136 is biased toward a position where the skirt portion of the valve 136 engages with the upper surface of the discharge port 134 so as to prevent water from entering the discharge port 134 from the water tank 120.

  The top wall 126 of the water tank 120 includes one or more supports 138 for supporting the inverted water tank 120 on a work surface, counter surface, or other support surface. In this example, two parallel supports 138 for supporting the inverted water tank 120 are formed around the top wall 126.

  As can now be seen with reference to FIGS. 4 and 8, the base 70 includes a water reservoir 140 for receiving water from the water tank 120. The water reservoir 140 is an independent part that is connected to the lower surface of the support wall 84 of the base 70 and is exposed by an opening formed in the support wall 84. The water reservoir 140 includes an inlet chamber 142 for receiving water from the water tank 120 and an outlet chamber 144 for receiving water from the inlet chamber 142 that atomizes the water and entrains the second air flow. . The inlet chamber 142 is located on one side of the water reservoir 140 and the outlet chamber 144 is located on the other side of the water reservoir 140. The water reservoir 140 includes a base and sidewalls that extend around the periphery of the base and stand upright from the base. The base is shaped such that the outlet chamber 144 is deeper than the inlet chamber 142. The portion of the base present in each chamber 142, 144 is substantially parallel and the bottom wall 80 of the base 70 so that the humidifier 10 is substantially horizontal when positioned on a horizontal support surface. Both are preferably parallel. Water can flow from the inlet chamber 142 to the outlet chamber 144 by a channel 150 formed in the water reservoir 140.

  A pin 152 extends upwardly from the portion of the base that partially forms the inlet chamber 142. When the water tank 120 is attached to the base 70, the pin 152 protrudes into the outlet 134 and pushes the valve 136 upward to open the outlet 134, thereby allowing water to flow into the inlet chamber 142 under gravity. When the inlet chamber 142 is filled with water, the water enters the outlet chamber 144 through the channel 150. As water flows out of the water tank 120, these waters are replaced in the water tank 120 by air entering the water tank 120 through slots 154 located in the side walls of the outlet 134. When chambers 142 and 144 are filled with water, the water levels in chambers 142 and 144 are equal. The discharge port 134 is arranged so that the water reservoir 140 can be filled with water up to a maximum water level substantially flush with the upper end of the slot 154 present in the side wall of the discharge port 134 and above this water level. Then, the air cannot enter the water tank 120 and replace the water flowing out of the water tank 120.

The portion of the base that partially forms the outlet chamber 144 includes a circular opening for exposing the piezoelectric transducer 156. The drive circuit 74 is configured to operate the vibration of the transducer 156 in an atomization mode to atomize water present in the outlet chamber 144. The converter 156 can oscillate ultrasonically at a frequency f ₁ that can be ₁ to 2 MHz in the atomization mode. Referring to FIG. 15 (b), the transducer 156 is connected to the lower side of the bottom wall 80 of the base 70 so as to protrude through an opening formed in the bottom wall 80 of the base 70. Form a part of The converter 156 is connected to the drive circuit 74 by a wire 158.

  The water reservoir 140 also includes an ultraviolet (UV) generator for irradiating the water in the water reservoir 140. In this embodiment, the UV generator is arranged to irradiate water in the outlet chamber 144 of the water reservoir 140. In this embodiment, the UV generator includes a UV lamp 160 that forms part of the UV lamp assembly 162 of the base 70. The UV lamp assembly 162 takes the form of a cartridge that can be removably inserted into the base 70 so that the user can replace it as needed. The water reservoir 140 includes a UV transmission tube 164. The tube 164 is located in the outlet chamber 144 of the water reservoir 140. The UV lamp assembly 162 is supported by the base 70 such that the UV lamp 160 is positioned within the tube 164 when fully inserted into the base. The open end of the tube 164 preferably protrudes through an opening formed in the side wall of the water reservoir 140 so that the UV lamp 160 can enter the tube 164. An O-ring seal member for preventing water leakage through the opening is provided between the tube 164 and the opening formed in the side wall.

  Referring to FIGS. 15 (a) and 15 (b), the bottom wall 80 of the base 70 includes an opening for inserting or removing the converter assembly 157 and the UV lamp assembly 162 from the base 70. Typically, the opening is covered by a panel 166 that is removably connected to the underside of the bottom wall 80 of the base 70. By removing the panel 166 from the bottom wall 80 of the base 70, the user can access both the UV lamp assembly 162 and the transducer assembly 157 as needed to replace or repair each assembly. .

  A float 168 is provided in the water tank 120, and a water level sensor 170 schematically shown in FIG. 17 for detecting the position of the float 168 is provided in the base 70, thereby controlling the water level in the water tank 120. A signal can be provided. The base 70 can also include a proximity sensor 172 for detecting that the water tank 120 is attached to the base 70. The proximity sensor 172 can take the form of a Hall effect sensor that interacts with a magnet (not shown) present on the lower wall 128 of the water tank 120 to detect the presence or absence of the water tank 120 on the base 70.

  The water tank 120 defines an inlet duct 174 for receiving a second air flow from the outlet port 114 of the base 70. In this embodiment, the inlet duct 174 is defined by a removable portion 176 of the water tank 120 that is removably connected to the inner wall 124 of the water tank 120 by a user operable clasp 177. The removable portion 176 is shown in FIG. 10 and FIG. 11 shows the position of the removable portion 176 relative to the base 70 when the water tank 120 is attached to the base 70. The removable portion 176 includes a body 178 formed of a material that is not transparent to ultraviolet radiation, preferably molded of a plastic material. The inlet duct 174 passes from the air inlet 180 through the body 178 to the air outlet 182. As shown in FIG. 4 (b), the air inlet 180 of the inlet duct 174 is positioned to face the outlet port 114 present in the central wall 82 of the base 70 when the water tank 120 is attached to the base 70. Located on the side wall of the body 178. The air outlet 182 of the inlet duct 174 is disposed on the bottom wall 184 of the main body 178 so as to be located above the water reservoir 140. The maximum water level of the water reservoir 140 is preferably selected such that the air outlet 182 is above the maximum water level. As a result, the second air stream enters just above the surface of the water present in the outlet chamber 144 of the water reservoir 140.

  The water tank 120 also includes an outlet duct for carrying a second air flow from the water reservoir 140 to the second air inlet 58 of the nozzle 14. In this embodiment, the outlet duct includes an inlet portion 186 and an outlet portion 188. The inlet portion 186 is defined by the removable portion 176 of the water tank 120. The removable portion 176 includes an air inlet 190 for the outlet duct. As shown in FIGS. 11 (c) and 11 (d), the air inlet 190 is disposed on the bottom wall 184 of the main body 178 so as to be positioned directly above the transducer 156 when the water tank 120 is attached to the base 70. Is done. As a result, the water column generated during operation of the converter 156 can enter the inlet portion 186 of the outlet duct, so that mist-like water particles generated in the vicinity of the water column can be reliably entrained in the second air flow. become. The air inlet 190 of the outlet duct is preferably substantially coplanar with the air outlet 182 of the inlet duct 174, and the flow path between the air outlet 182 of the inlet duct 174 and the air inlet 190 of the outlet duct is It is preferably located adjacent to the air outlet 182 of the inlet duct 174 so that the length is minimal.

  The body 178 of the removable portion 176 includes a flange 192 that extends outwardly from the bottom wall 184. The flange 192 extends around most of the body 178. The flange 192 is positioned above the recess 194 of the support wall 84 that extends around the water reservoir 140 when the water tank 120 is attached to the base 70, and is preferably shaped to be attached to the recess 194. As can be seen by comparing FIGS. 8 (a) to 8 (d) and FIGS. 11 (a) to 11 (d), the flange 192 is located around the outlet chamber 144 of the water reservoir 140 during operation of the UV lamp 160. Blocks the portion 196 and thus serves to suppress leakage of ultraviolet radiation from the peripheral portion 196 of the outlet chamber 144.

  The removable portion 176 includes a wall 198 depending from the flange 192 for directing a second air flow from the air outlet 182 of the inlet duct 174 towards the air inlet 190 of the outlet duct. The wall 198 is annular and is positioned to delimit the flow channel located directly below the air outlet 182 of the inlet duct 174 and the air inlet 190 of the outlet duct, and thus extend around it. The height of the wall 198 extends so that the end of the wall 198 extends into the water accumulated in the outlet chamber 144 when the outlet chamber 144 of the water reservoir 140 is filled with water up to the maximum water level. Selected to build an interface with the water to form a seal to prevent leakage of the second air flow from the flow channel defined by the wall 198.

  The body 178 of the removable portion 176 includes a port 200 through which a second air flow from the inlet portion 186 enters the outlet portion 188. When the removable portion 176 is connected to the inner wall 124 of the water tank 120, the removable portion 176 defines the inner portion of the outlet portion 188 and the inner wall 124 defines the outer portion of the outlet portion 188. A seal 202 disposed on the removable portion 176 forms a hermetic seal to prevent leakage of a second air flow from the interface between the inner wall 124 and the removable portion 176. In this embodiment, the outlet portion 188 of the outlet duct branches to form a pair of duct branches 204 that each include a respective air outlet 206 of the outlet duct. This allows the outlet duct to provide a second air flow around the portion of the base 70 that can be actuated by the user to release the nozzle 14 from the base 70, in this embodiment around the button 260 (discussed in more detail below). Will be able to carry.

  With reference to FIGS. 4 (a) and 9 (a), the water tank 120 includes a seal 210 for engaging the base 56 of the nozzle 14. In FIG. 9A, the seal 210 is shown removed from the remaining portion of the water tank 120 so that its features can be seen. The seal 210 is supported by a support body 212 that is integrated with the inner wall 124 of the water tank 120. The seal 210 is removably connected to the support 212 so that the user can remove the seal for cleaning and replacement. For example, the seal 210 includes a pair of resilient fingers 214 that extend through an opening 216 formed in the support 212 when the seal 210 is connected to the support 212. When removing the seal 210 from the support 212, the user picks the finger 214 so that the finger 214 passes through the opening 216 when the seal 210 is pulled away from the support 212. Finger 214 is connected to a relatively rigid frame 218 of seal 210. The frame 218 is shaped to surround the end of the base 56 of the nozzle 14.

  Frame 218 supports a relatively flexible elastic portion of seal 210. The elastic portion of the seal 210 includes a first portion 220 for engaging the end of the base 56 of the nozzle 14 that is held and surrounded by the frame 218. The elastic portion of the seal 210 is a pair of second portions depending from the first portion 220 that engages the support 212 to urge the frame 218 away from the support 212 and bias toward the base 56 of the nozzle 14. 222 is also included. The seal 210 and support 212 include an opening or passage 224 that allows a second air flow to pass through the base 56 of the nozzle 14. In this embodiment, each second portion 222 is tubular and has a corrugated or bellows shape.

  As shown in FIG. 4, when the water tank 120 is attached to the base portion 70, the inner wall 124 surrounds the upper wall of the base portion 70 to expose the open upper end portion of the upper cylindrical portion of the upper wall. The water tank 120 includes a handle 230 that facilitates removal of the water tank 120 from the base 70. The handle 230 moves with respect to the water tank 120 between a storage position in which the handle 230 is stored in the recess 232 of the water tank 120 and a deployment position in which the handle 230 is raised above the upper wall 126 of the water tank 120 so that the user can hold it. It is pivotally connected to the water tank 120 so that it can.

  When the nozzle 14 is attached to the body 12, the base 26 of the outer casing portion 22 of the nozzle 14 is located on the open end of the upper cylindrical portion of the upper wall of the base 70, and the base 56 of the front casing portion 50 of the nozzle 14 is It is located on the seal 210 of the water tank 120. Thereafter, the user pushes the nozzle 14 toward the main body 12. When the bases 26, 56 of the nozzle 14 are fully inserted into the body 12, the annular seal 109 b engages the end of the base 26 of the nozzle 14 to form an airtight seal between the nozzle 14 and the base 70. The seal 210 engages the end of the base 56 of the nozzle 14 to form an airtight seal between the nozzle 14 and the water tank 120.

  Next, referring to FIG. 4C and FIGS. 6 to 8, the main body 12 includes a sensor 240 for detecting the position of the nozzle 14 relative to the main body 12. The sensor 240 is connected to a drive circuit 74 that is configured to inhibit the operation of the UV lamp 160 unless indicated by a signal received from the sensor 240 that the nozzle 14 is fully inserted into the body 12. Is done. In this example, the nozzle 14 includes a magnet 242 and the sensor 240 takes the form of a Hall effect sensor that generates a signal indicative of the detected intensity of the magnetic field generated by the magnet 242. The sensor 240 is located in a housing 88c defined by the cylindrical walls 88a, 88b of the base 70 of the body 12, and the magnet 242 is attached to the sensor 240 when the base 26 of the nozzle 14 is fully inserted into the base 70 of the body 12. It exists on the base 26 of the nozzle 14 so that it may be located adjacently.

  The base 26 of the nozzle 14 includes a housing 244 for holding a magnet 242. The housing 244 is located on the outer surface of the base 26. The housing 244 has an annular wall integral with the base 26 that defines at least the side wall 246, the lower end wall 248, and the upper end wall of the housing 248. The housing 244 can have one of a variety of other shapes, such as a rectangle or other polygon, so that the annular wall is a series of connected walls that define the side walls 246 and end walls of the housing 244. It can be replaced with a part. The wall portion of the housing 244 surrounds the magnet 242. A cover 250 is connected to the wall portion of the housing 244 by a snap connector.

  The inner cylindrical wall 88 b of the base 70 includes a groove 252 that is shaped to receive the housing 244 when the nozzle 14 is attached to the body 12. The sensor 242 is positioned in the housing 88c so as to be located between the groove 252 and the outer cylindrical wall 88a. The groove 252 and the housing 244 have substantially the same shape so that the nozzle 14 is angularly aligned with the body 12 when the base 26 of the nozzle 14 is inserted into the body 12. The groove 252 engages with the side wall 246 of the housing 244 to engage the side wall 254 for suppressing relative rotation between the nozzle 14 and the main body 12 and the lower end wall 248 of the housing 244, thereby And an end wall 256 for limiting the degree of insertion into the groove 252.

  With reference to FIG. 4F and FIGS. 6 to 8, a mechanism for releasably holding the nozzle 14 on the main body 12 is provided. In general, the body 12 includes a button 260, a detent 262 for engaging the nozzle 14, and an annular actuator 264. The detent 262 can be moved relative to the base 70 between a holding position for holding the nozzle 14 on the main body 12 and a release position for releasing the nozzle 14 so that it can be removed from the main body 12. Is mounted in the housing 88c. Each detent 262 is pivotally mounted in the housing 88c and is biased by a spring 265 toward a holding position where each detent 262 protrudes through an opening formed in the cylindrical wall 88b of the base 70. . These detents 262 face diametrically. When the user attaches the nozzle 14 to the body 12, the detent 262 is biased away from the holding position by the base 26 of the nozzle 14, allowing the base 26 of the nozzle 14 to enter the base 70 of the body 12. To do. The base 26 of the nozzle 14 includes a pair of diametrically opposed recesses 266 that are angularly aligned with the detent 262 when the nozzle 14 is inserted into the body 12. When the nozzle 14 is fully inserted into the main body 12, the detent 262 enters the groove 266 by the biasing force of the spring 265 and holds the nozzle 14 on the main body 12 unless the user presses the button 260.

  Actuator 264 takes the form of a non-circular hoop located within cavity 88c for engaging detent 262. The button 260 and the actuator 264 are arranged such that when the user presses the button 260, the actuator 264 rotates in the cavity 88c. For example, the actuator 264 includes a protrusion 264a that contacts and is pushed to one side when the user presses the button 260, thereby causing the actuator 264 to rotate clockwise within the housing 88c. The actuator 264 engages with the detent 262 during rotation due to its asymmetric shape, and moves the detent 262 away from the groove 266 to the release position against the biasing force of the spring 265. Thereby, the user can remove the nozzle 14 from the main body 12. When the nozzle 14 is lifted from the main body 12, the user can release the button 260. The spring 265 biases the detent 262 back to the holding position, whereby the actuator 264 rotates counterclockwise within the housing 88c to raise the button 260.

  Once the nozzle 14 is removed from the body 12, the user can remove the water tank 120 from the base 70 to fill, for example, the water tank 120, or remove the removable portion 176 and the seal 210 and clean it. While removing the nozzle 14 from the main body 12, particularly when returning the water tank 120 onto the base 70, there is an opportunity for water to flow into the main body 12 through the exposed first air passage 76. For example, as can be seen with reference to FIGS. 4 (e), 13 and 14, water drops may fall on the exposed upper surface of the upper portion 96 of the motor bucket. In order to prevent these water drops from flowing down the motor bucket and entering the motor or motor bearing components, the lower portion 98 of the motor bucket has a lip 270 that forms an annular drop edge that extends around the motor bucket. Provided. As a result, any water droplets that flow down the side surfaces of the motor bucket enter the impeller 90 away from the motor 92.

  Impeller 90 includes a substantially conical hub 272 and a series of curved vanes 274 connected to and preferably integral with the outer surface of hub 272. In this embodiment, the impeller 90 further includes a generally frustoconical shroud 276 connected to the outer edge of the curved vane 274. When water drops fall from the lip portion 270, these water drops fall between the hub 272 and the shroud 276 in the impeller 90. Thereafter, the water drops fall from the impeller 90 through the inlet member 108 onto the silencing foam sheet 81. In order to minimize any disruption of the air flow generated by the rotation of the impeller 90, the lip 270 does not protrude downwardly beyond the hub 272 of the impeller 90 from the motor bucket.

  The lip portion 270 is defined by the outer peripheral wall of the annular groove 278 formed in the lower portion of the motor bucket. Impeller 90 includes an annular vane 280 connected to the base of hub 272 so as to extend into groove 278. In this embodiment, each of the groove 278 and the blade 280 is annular. During rotation of the impeller 90, the vanes 280 generate an air boundary adjacent to the lip 270 that allows water droplets to pass over the lip 270 along the lower portion 98 of the motor bucket. Is further suppressed.

  Referring again to FIG. 4 (d) and FIGS. 15 and 16, the drive circuit 74 is located in the base 70. The drive circuit 74 is connected to the lower surface of the annular support wall 84 of the base 70 by screws. Accordingly, as shown in FIG. 15 (c), the drive circuit 74 is located in the immediate vicinity of the air inlet 72 of the apparatus 10. To prevent the drive circuit 74 from being exposed to any moisture or other material that enters the base 70 through the air inlet 72, the base 70 removes the drive circuit 74 from the air flow passing from the air inlet 72 to the inlet member 108. A panel 290 connected to the support wall 84 for blocking is included.

  FIG. 16 shows the panel 290 alone, and FIG. 15B shows the panel 290 in its original position in the base 70. Panel 290 has substantially the same shape as drive circuit 74, and includes a C-shaped main body 292 and a rising wall 294 extending upward from the peripheral edge of main body 292. The body 292 has a plurality of differently shaped rising portions to accommodate various different components of the drive circuit 74.

  Panel 290 includes a trough 296 located below connector 75a to which the user attaches the main power cable. The trough 296 includes a drain hole 298 for draining any such water from the trough 296 because there is a risk of water entering the base 70 through the opening 75b when the main power cable is disconnected from the base 70. .

  As described above, the button 73 for controlling the operation of the humidifier can be located on the outer wall 71 of the base 70 of the main body 12. The button 73 can be used to turn the motor 92 on and off by operating and stopping the motor 92. The humidifying device 10 also includes a remote control device 300 for transmitting a control signal to the user interface circuit 302 of the humidifying device 10. FIG. 17 schematically shows a control system for the humidifying device 10 including the remote control device 300, the user interface circuit 302, and other electrical components of the humidifying device 10. In summary, the remote control device 300 includes a plurality of buttons that can be pressed by the user, and a control device for generating and transmitting an infrared signal in response to one of the buttons being pressed. The infrared signal is emitted from a window located at one end of the remote control device 300. The control device receives power from the battery in the battery housing of remote control device 300.

  The first button is used to activate and deactivate the motor 92, and the second button is used to set the speed of the motor 92 and thus the rotational speed of the impeller 90. The control system can have a discrete number of user-selectable settings, each corresponding to a different rotational speed of the motor 92. A third button is used to set a desired relative humidity level in an environment in which the humidifier 10 is present, such as a room, office or other home environment. For example, the desired relative humidity level can be selected within a range of 30-80% at 20 ° C. by repeatedly actuating the third button. A fourth button can be used to selectively stop the transducer 156 to prevent the second air stream from being humidified.

  The user interface circuit 302 displays a switch that is activated by the operation of the button 73 by the user, a sensor or receiver 304 for receiving a signal transmitted by the remote control device 300, and the current operational settings of the humidifying device 10. Display 306. For example, the display 306 can typically show the currently selected relative humidity level. When the user changes the rotation speed of the motor 92, the display 306 can temporarily indicate the latest speed setting selected. The display 306 can be directly behind the transparent or translucent portion of the outer wall 71 of the base 70, and the sensor 304 can be behind the button 73.

  The user interface circuit 302 is connected to the drive circuit 74. The drive circuit 74 includes a microprocessor and a motor driver for driving the motor 92. A main power cable (not shown) for supplying electric power to the humidifier 10 extends through an opening 75b formed in the base 70. This cable is connected to a plug. Drive circuit 74 includes a power supply unit connected to connector 75a. The user interface may also include one or more LEDs that provide a visual warning depending on the state of the humidifier 10. For example, the first LED 308 can be lit to indicate that the water tank 120 has been depleted as indicated by the signal received by the drive circuit 74 from the water level sensor 170.

A humidity sensor 310 for detecting the relative humidity of the air in the external environment and supplying a signal indicating the detected relative humidity to the drive circuit 74 is also provided. In this example, the humidity sensor 310 can be positioned directly behind the air inlet 72 so as to detect the relative humidity of the air flow drawn into the humidifier 10. The drive interface 74 when the user interface indicates that the output from the humidity sensor 310 indicates that the relative humidity H _{D of the} air stream entering the humidifier 10 is at or above the desired relative humidity level H _S set by the user. Can include a second LED 312 that is illuminated by.

  The user activates the first button of the remote control device to operate the humidification device 10, and the remote control device 300 responds by generating a signal including data indicating the activation of the first button. This signal is received by the receiver 304 of the user interface circuit 302. The operation of the button is communicated to the drive circuit 74 by the user interface circuit 302, and the drive circuit 74 activates the UV lamp 160 in response to irradiating the water accumulated in the outlet chamber 144 of the water reservoir 140. . In this example, the drive circuit 74 simultaneously drives the motor 92 to rotate the impeller 90. As the impeller 90 rotates, air is drawn into the main body 12 through the air inlet 72. The air flow passes through the impeller housing 104 and the guide vane 100. Downstream of the guide vane 100, a part of the air discharged from the guide vane 100 enters the duct 110, while the remainder of the air discharged from the guide vane 100 flows along the first air passage 76 to the nozzle 14. To the first air inlet 28. Accordingly, the impeller 90 and the motor 92 can be considered to generate a first air flow that is carried by the first air passage 76 to the nozzle 14 and enters the nozzle 14 through the first air inlet 28.

  The first air flow enters the first internal passage 46 at the lower end of the first internal passage 46. The first air stream is divided into two air streams that flow in opposite directions around the bore 20 of the nozzle 14. As the air stream passes through the first internal passage 46, the air enters the mouth portion 48 of the nozzle 14. The velocity of the air flow entering the mouse portion 48 is preferably substantially uniform around the bore 20 of the nozzle 14. The mouse part 48 induces an air flow toward the first air outlet 30 of the nozzle 14, and the air flow exits the humidifier 10 through the first air outlet 30.

  The air flow discharged from the first air outlet 30 is entrained by entraining air from the outside environment, specifically from the surrounding area of the first air outlet 30 and the periphery of the rear portion of the nozzle 14. A secondary air flow is generated. A portion of this secondary air flow passes through the bore 20 of the nozzle 14 while the rest of the secondary air flow is entrained in front of the nozzle with the air flow emitted from the first air outlet 30. It becomes like this.

  As described above, the air enters the second air passage 78 by the rotation of the impeller 90 and forms a second air flow. The second air stream passes through the duct 110 and the inlet duct 174 of the removable portion 176 of the water tank 120 and is released onto the water accumulated in the outlet chamber 144 of the water reservoir 140. When the drive circuit 74 activates the vibration of the transducer 156 to atomize the water accumulated in the outlet chamber 144 of the water reservoir 140, floating water droplets form above the water present in the outlet chamber 144 of the water reservoir 140. Is done. In response to user input received from the remote control device 300 and / or a certain time after actuation of the motor 92, the transducer 156 can be activated to create an air flow through the humidifier 10.

  Due to the rotation of the impeller 90, the suspended water droplets accompany the second air flow. At this point, the humid second air stream passes upward through the outlet duct to the second air inlet 58 of the nozzle 14 and enters the second internal passage 68 in the front portion 18 of the nozzle 14.

  The second air stream is split into two air streams that flow in opposite directions around the bore 20 of the nozzle 14 at the base of the second internal passage 68. As these air streams pass through the second internal passage 68, each air stream is discharged from the second air outlet 60. The released second air stream is carried away from the humidifier 10 in the air stream generated by the discharge of the first air stream from the nozzle 14, thereby becoming wet at a distance of several meters from the humidifier 10. You will be able to experience the airflow quickly.

The moist air flow is detected by the humidity sensor 310, the humidifier relative humidity H _D of the air stream entering the 10, the user relative humidity level H _S selected by using the third button of the remote control device 270 From the nozzle 14 until 1% higher at 20 ° C. Thereafter, the release of the humid air stream from the nozzle 14 can be terminated by the drive circuit 74, preferably by changing the mode of vibration of the transducer 156. For example, the vibration frequency of the converter 156 can be lowered to a frequency f ₃ where f ₁ > f ₃ ≧ 0, and if it is lower than this, the atomization of accumulated water is not performed. Alternatively, the vibration amplitude of the transducer 156 can be reduced. Optionally, the motor 92 can be stopped so that no air flow is discharged from the nozzle 14. However, when the humidity sensor 310 is located in the immediate vicinity of the motor 92, it is preferable to keep the motor 92 operating in order to avoid undesirable humidity fluctuations in the local environment of the humidity sensor 310.

Results release of moist air flow from the humidifying device 10 is completed, the relative humidity H _D detected by the humidity sensor 310 begins to decrease. When the relative humidity of the ambient air near the humidity sensor 270 drops by 1% at 20 ° C. from the user selected relative humidity H _S , the drive circuit 74 reactivates the transducer 156 vibration in the atomization mode. When the motor 92 is stopped, the drive circuit 74 also restarts the motor 92 at the same time. As described above, this moist air is released from the nozzle 14 until the relative humidity H _D detected by the humidity sensor 310 is 1% higher at 20 ° C. than the relative humidity level H _S selected by the user.

  The operating sequence of the converter 156 (and optionally the motor 92) to maintain this detected humidity level in the vicinity of the user selected level is either until the first button is activated again or in the water tank 120. Continues until a signal is received from the water level sensor 170 indicating that the water level has dropped below the minimum water level. When the first button is activated or when this signal is received from the water level sensor 170, the drive circuit 74 stops the motor 92, the converter 156 and the UV lamp 160 to turn off the humidifier 10. In addition, the drive circuit 74 is responsive to receiving a signal from the proximity sensor 172 indicating that the water tank 120 has been removed from the base 70 and a signal indicating that the nozzle 14 has been removed from the base 70. In response to being received from sensor 240, these components of humidifier 10 are turned off.

Claims (4)

A fan assembly comprising a main body and a nozzle connected to the main body, the main body comprising:
Impeller,
A motor housing;
A motor for driving the impeller, located in the motor housing;
The impeller includes a substantially conical hub connected to the motor, a plurality of curved blades connected to an outer surface of the hub, and an annular blade connected to the base of the hub. Have
The motor housing has an annular groove for receiving at least a tip of the annular blade, and an annular lip portion forming a drip edge extending around the motor housing, and the annular lip portion is formed in the groove. Determine the outer wall of the
A fan assembly characterized by that. The annular blade is substantially cylindrical;
The fan assembly according to claim 1. The annular groove is formed in a substantially frustoconical wall of the motor housing located adjacent to the hub of the impeller;
The fan assembly according to claim 1 or 2. The annular lip portion does not protrude downward from the motor housing beyond the hub of the impeller;
The fan assembly according to any one of claims 1 to 3.