Nebulizer with power supply system

Abstract

To provide a power feeding system that wirelessly feeds from a power transmission side circuit to a power reception side circuit and directly supplies an AC power generated in a power reception coil to a load, to prevent deterioration of power transmission efficiency from a power transmission side circuit to a power reception side circuit, even if a load impedance changes.SOLUTION: A power feeding system of the present invention performs wireless power feeding from a power transmission side circuit 60C to a power reception side circuit 70C. The power transmission side circuit 60C transmits power through a power transmission coil 62 toward the power reception side circuit 70C at a certain oscillation frequency fd. In the power reception side circuit 70C, a power reception side resonance circuit 70R is configured by a power reception coil 72 and a load 40, and resonance frequency of the power reception side resonance circuit 70R is determined. When the resonance frequency of the power reception side resonance circuit 70R changes as impedance Zx of the load 40 changes during power supply, a control unit 60 controls the oscillation frequency fd so as to maintain power transmission efficiency from the power transmission side circuit 60C to the power reception side circuit 70C.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] This invention relates to a power supply system. Nebulizer with More specifically, a power supply system that wirelessly supplies power from a power transmission side circuit including a power transmission coil to a power reception side circuit including a power reception coil, and supplies AC power generated in the power reception coil directly to a load. Equipped with Regarding nebulizers. [Background technology]

[0002] Conventionally, as disclosed in Patent Document 1 (International Publication No. 2014 / 178345), for example, this type of power supply system is a power supply system in which power is transmitted wirelessly from a primary resonant circuit to a secondary resonant circuit and power is supplied to a load connected to the secondary resonant circuit, and the power (AC power) generated on the secondary side is supplied directly to the load without being first converted to DC.

[0003] Furthermore, Patent Document 2 (International Publication No. 2014 / 111972) describes that when power is transmitted contactlessly from the primary power coil to the secondary power coil, the high-frequency voltage generated in the secondary power coil is supplied as driving power to an ultrasonic transducer as a load. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2014 / 178345 [Patent Document 2] International Publication No. 2014 / 111972 Summary of the Invention [Problem to be solved by the invention]

[0005] According to the descriptions in Patent Documents 1 and 2, in a power supply system that wirelessly supplies power from a power transmitting side circuit including a power transmitting coil to a power receiving side circuit including a power receiving coil, a circuit configuration is considered in which the AC power generated in the power receiving coil is not first converted to DC but is instead directly supplied to an ultrasonic transducer as a load.

[0006] However, in the above circuit configuration, the impedance (dominantly capacitive reactance, but also including inductive reactance and resistance components) of the ultrasonic transducer as a load may change during power supply due to the influence of temperature fluctuations, etc., and the resonant frequency of the resonant circuit formed by the receiving coil and the ultrasonic transducer in the receiving circuit may change. In such a case, a problem occurs in that the efficiency of power transmission from the transmitting circuit to the receiving circuit decreases.

[0007] Therefore, an object of the present invention is to provide a power supply system that wirelessly supplies power from a power transmitting circuit to a power receiving circuit and supplies AC power generated in a power receiving coil directly to a load. A nebulizer comprising: Prevents a decrease in the efficiency of power transmission from the power transmitting circuit to the power receiving circuit even if the load impedance changes. can To provide a nebulizer. [Means for solving the problem]

[0008] In order to solve the above problems, Nebulizer teeth, A nebulizer that atomizes and ejects a liquid, The device includes a lower body and an upper body that is combined with the lower body, The lower part of the main body is equipped with a power supply unit, an oscillation unit that receives power from the power supply unit and generates an oscillation output, and a power transmission side circuit for transmitting the oscillation output to the upper part of the main body, The upper part of the main body is equipped with a power receiving circuit for receiving the oscillation output, and an atomization unit including an ultrasonic vibrator configured to atomize a supplied liquid using the received oscillation output, A nebulizer including a power supply system that wirelessly supplies power from the power transmitting circuit to the power receiving circuit, the power transmitting side circuit includes a power transmitting coil, and transmits power to the power receiving side circuit through the power transmitting coil at a certain oscillation frequency; In the power receiving side circuit, a power receiving coil and the ultrasonic transducer as a load including a capacitive reactance configure a power receiving side resonant circuit, and a resonant frequency of the power receiving side resonant circuit is determined. a control unit that controls the oscillation frequency so as to maintain power transmission efficiency from the power transmitting circuit to the power receiving circuit when the resonant frequency of the power receiving side resonant circuit changes as the impedance including the capacitive reactance of the ultrasonic transducer changes during power supply. It is characterized by:

[0009] In this specification, the term "load including capacitive reactance" means 、This refers to an ultrasonic transducer. An ultrasonic transducer has a piezoelectric ceramic and a pair of electrodes sandwiching the piezoelectric ceramic, and when a high-frequency voltage is applied between the pair of electrodes, the piezoelectric ceramic is ultrasonically vibrated.

[0010] This disclosure Nebulizer Then, the control unit controls the load during power supply. The ultrasonic transducer as described above When the resonant frequency of the power receiving side resonant circuit changes with a change in the impedance including the capacitive reactance, the oscillation frequency is controlled so as to maintain the efficiency of power transmission from the power transmitting side circuit to the power receiving side circuit. Nebulizer According to this, even if the impedance of the load changes, it is possible to prevent a decrease in efficiency of power transmission from the power transmitting side circuit to the power receiving side circuit. As a result, the atomization unit including the ultrasonic vibrator can stably atomize and spray the supplied liquid using the received oscillation output.

[0011] In one embodiment Nebulizer So, The control unit is a detection unit that detects a voltage value and / or a current value for power transmission in the power transmission side circuit, When starting power supply, the oscillation frequency in the power transmitting side circuit is made to coincide with the resonant frequency of the power receiving side resonant circuit; when the impedance of the power receiving side circuit changes in accordance with the change in the load during power supply, the change in the impedance of the power receiving side circuit is detected by the detection unit in accordance with the voltage value and / or the current value in the power transmitting side circuit; The oscillation frequency is controlled so as to maintain the power transmission efficiency based on the detection result by the detection unit. It is characterized by:

[0012] The term "voltage value and / or current value" may refer to either the voltage value or the current value, or both. For example, it may refer to the ratio of voltage to current. The voltage value and the current value may each be an effective value.

[0013] In this embodiment NebulizerIn the embodiment, the control unit makes the oscillation frequency in the power transmitting side circuit coincide with the resonance frequency of the power receiving side resonant circuit when power supply starts. Since the impedance (particularly, capacitive reactance) of the load has a predetermined value when power supply starts, the oscillation frequency in the power transmitting side circuit can be made to coincide with the resonance frequency of the power receiving side resonant circuit. Furthermore, when the impedance of the power receiving side circuit changes due to the change in the load during power supply, the control unit detects the change in the impedance of the power receiving side circuit by the detection unit according to the voltage value and / or current value in the power transmitting side circuit. Then, the control unit controls the oscillation frequency so as to maintain the power transmission efficiency based on the detection result by the detection unit. Therefore, it is possible to prevent a decrease in the power transmission efficiency from the power transmitting side circuit to the power receiving side circuit.

[0014] In one embodiment Nebulizer So, In the power transmission side circuit, the power transmission coil and a capacitor configure a power transmission side resonant circuit, and a resonant frequency of the power transmission side resonant circuit is the oscillation frequency, When the resonant frequency of the power receiving side resonant circuit changes in accordance with the change in the load during power supply, the control unit controls the resonant frequency of the power transmitting side resonant circuit so as to maintain a tuned state between the power transmitting side resonant circuit and the power receiving side resonant circuit. It is characterized by:

[0015] In this embodiment Nebulizer In the power supply device, when the resonant frequency of the power receiving side resonant circuit changes in accordance with the change in the load during power supply, the control unit controls the resonant frequency of the power transmitting side resonant circuit so as to maintain a tuned state between the power transmitting side resonant circuit and the power receiving side resonant circuit. Nebulizer According to this, even if the impedance of the load changes, it is possible to prevent a decrease in efficiency of power transmission from the power transmitting side circuit to the power receiving side circuit.

[0016] In one embodiment Nebulizer So, The control unit is a detection unit that detects a voltage value and / or a current value for power transmission in the power transmission side circuit, At the start of power supply, a resonant frequency of the power transmitting side resonant circuit is made to coincide with an initial value of a resonant frequency of the power receiving side resonant circuit, so that the power transmitting side resonant circuit and the power receiving side resonant circuit are in a tuned state; detects, by the detection unit, that the impedance of the power receiving side circuit has changed due to the change in the load during power supply, and that the resonant frequency of the power receiving side resonant circuit has shifted from the initial value to another value, according to the voltage value and / or the current value in the power transmitting side circuit; Based on the detection result by the detection unit, the resonant frequency of the power transmitting side circuit is controlled so as to coincide with the different value, thereby maintaining a tuned state between the power transmitting side resonant circuit and the power receiving side resonant circuit. It is characterized by:

[0017] In this embodiment Nebulizer In the above, the control unit makes the resonant frequency of the power transmitting side resonant circuit coincide with the initial value of the resonant frequency of the power receiving side resonant circuit at the start of power supply, thereby making the power transmitting side resonant circuit and the power receiving side resonant circuit in a tuned state. Note that, at the start of power supply, the impedance (particularly, capacitive reactance) of the load has a predetermined value, so that the oscillation frequency in the power transmitting side circuit can be made to coincide with the initial value of the resonant frequency of the power receiving side resonant circuit. Furthermore, the control unit detects, by the detection unit, that the impedance of the power receiving side circuit has changed in accordance with the change in the load during power supply, and the resonant frequency of the power receiving side resonant circuit has shifted from the initial value to another value, according to the voltage value and / or current value in the power transmitting side circuit. Then, the control unit maintains the tuned state between the power transmitting side resonant circuit and the power receiving side resonant circuit by controlling the resonant frequency of the power transmitting side circuit to coincide with the other value based on the detection result by the detection unit. Therefore, it is possible to prevent a decrease in the efficiency of power transmission from the power transmitting circuit to the power receiving circuit.

[0018] In one embodiment Nebulizer So, the control unit calculates a current oscillation power in the power transmitting side circuit based on the voltage value and the current value detected by the detection unit; When the impedance of the power receiving circuit changes with the change in the load during power supply, causing the oscillation power to deviate from a predetermined target power value, the oscillation power is adjusted so that the oscillation power becomes the target power value. It is characterized by:

[0019] In this embodiment Nebulizer In the power supply control device, the control unit calculates an oscillating power in the power transmitting circuit based on the voltage value and the current value detected by the detection unit. Furthermore, when the impedance of the power receiving circuit changes with the change in the load during power supply and the oscillating power deviates from a predetermined target power value, the control unit adjusts the oscillating power so that the oscillating power becomes the target power value. Thus, the oscillating power in the power transmitting circuit is maintained at the target power value.

[0020] In one embodiment Nebulizer So, The control unit is determining whether an error has occurred in which the voltage value in the power transmitting side circuit exceeds a predetermined specified value, the current value in the power transmitting side circuit falls below a predetermined specified value, and / or an oscillation power, which is a product of the voltage value and the current value, falls outside a predetermined allowable range; When the error continues for a predetermined period of time, an alarm signal is output to notify the user of the error. It is characterized by:

[0021] The "predetermined time" is, for example, a period equivalent to three control periods (30 milliseconds) when one control period of the control unit is 10 milliseconds.

[0022] The "output" of an alarm signal refers to, for example, the display of a lamp (lighting or flashing) or the generation of a buzzer sound.

[0023] In this embodiment NebulizerIn the above, the control unit determines whether an error has occurred, in which the voltage value in the power transmission side circuit exceeds a predetermined specified value, the current value in the power transmission side circuit falls below a predetermined specified value, and / or the oscillation power, which is the product of the voltage value and the current value, falls outside a predetermined allowable range. Then, when the error continues for a predetermined time, the control unit outputs an alarm signal indicating the occurrence of the error to notify the user. The user can be informed of the occurrence of the error by the alarm signal. Therefore, the user can take measures, such as stopping and restarting the power supply system, or, if errors occur frequently, can request repairs from the manufacturer's service department.

[0024]

[0025]

[0026] In one embodiment of the nebulizer, the control unit is mounted on a lower part of the main body.

[0027] In the nebulizer of this embodiment, in addition to the power supply unit, the oscillator unit, and the power transmission side circuit, which are mounted on the lower part of the main body, the control unit is also mounted on the lower part of the main body. Therefore, in addition to the power supply unit, the oscillator unit, and the power transmission side circuit, the control unit is protected by the housing that forms the lower part of the main body. For example, it is possible to prevent erosion by the liquid. Effect of the Invention

[0028] As is apparent from the above, the power supply system of this disclosure Equipped with According to the nebulizer, the load Ultrasonic transducer as Even if the impedance of the power transmitting circuit changes, it is possible to prevent a decrease in the efficiency of power transmission from the power transmitting circuit to the power receiving circuit. [Brief description of the drawings]

[0029] [Figure 1] 1 is a perspective view showing a disassembled state of a nebulizer equipped with a power supply system according to an embodiment of the present invention. FIG. [Diagram 2] FIG. 2 is a schematic diagram showing the internal structure of the nebulizer as viewed from the side. [Diagram 3] FIG. 2 is a block diagram showing the configuration of a control system for the nebulizer. [Figure 4] 1A to 1C are diagrams showing various possible configurations of the power transmitting circuit and the power receiving circuit of the nebulizer. [Diagram 5] Fig. 5(A) is a diagram showing a specific example of the configuration when the power transmitting circuit and the power receiving circuit of the nebulizer are of the PP type. Fig. 5(B) is a diagram showing the waveform of a signal representing an oscillation frequency generated by the control unit. Fig. 5(C) is a diagram showing an equivalent circuit of a horn vibrator as a load. [Figure 6] FIG. 2 is a diagram showing how the nebulizer is used by a user. [Figure 7] FIG. 7 is a diagram showing a schematic operation flow of the control unit of the nebulizer. [Figure 8] 8(A) and 8(B) are diagrams showing a specific operational flow of the feedback included in the operational flow of FIG. [Figure 9] Fig. 9(A) is a diagram showing the relationship between the oscillation frequency fd at the start of operation (power supply) and the effective current value Ie and the effective voltage value Ve in the power transmission circuit when the power transmission circuit and the power receiving circuit of the nebulizer are configured as a PP system example. Fig. 9(B) is a diagram showing the relationship between the oscillation frequency fd and the effective current value Ie and the effective voltage value Ve when a frequency shift occurs in Fig. 9(A). Fig. 9(C) is a diagram showing the relationship between the oscillation frequency fd and the effective current value Ie and the effective voltage value Ve when the oscillation frequency fd is corrected in Fig. 9(B). [Figure 10] Fig. 10(A) is a diagram showing the phases of the oscillation current Io and the oscillation voltage Vo in the case of Fig. 9(A) Fig. 10(B) is a diagram showing the phases of the oscillation current Io and the oscillation voltage Vo in the case of Fig. 9(B). [Figure 11]Fig. 11(A) is a diagram showing the relationship between the oscillation frequency fd at the start of operation (power supply) and the effective current value Ie and the effective voltage value Ve in the power transmission circuit when the power transmission circuit and the power receiving circuit of the nebulizer are configured as an example of the NP type or NS type. Fig. 11(B) is a diagram showing the relationship between the oscillation frequency fd and the effective current value Ie and the effective voltage value Ve when a load increase occurs in Fig. 11(A). Fig. 11(C) is a diagram showing the relationship between the oscillation frequency fd and the effective current value Ie and the effective voltage value Ve when a frequency shift occurs in Fig. 11(A). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0031] (Outline of nebulizer configuration) FIG. 1 is a diagram showing a power supply system according to an embodiment of the present invention. Equipped with The nebulizer (generally designated by the reference symbol 1) is shown in an exploded state. This nebulizer 1 is roughly divided into a main body 11 as a lower main body portion having a main body housing 11M, and a spray unit 12 as an upper main body portion removably attached to this main body 11.

[0032] In this example, main body housing 11M forming main body 11 has an elliptical planar shape (having a long axis 11A extending from the front left to the back right in FIG. 1) and a columnar outer shape extending in the direction of vertical axis 11C (in this example, vertical direction). A power switch 50A for turning on and off the power of nebulizer 1 and indicator lamps 51A, 51B for indicating the operating state of nebulizer 1 are provided on the front surface 11Ms (the side surface on the front left in FIG. 1) of main body housing 11M. A recess 11K1 having an approximately short cylindrical outer shape is provided in the center (through which vertical axis 11C passes) of upper wall 11Mt of main body housing 11M as an element for detachably mounting main body 11 and spray unit 12. In this example, the recess 11K1 has azimuth grooves 11K1e, 11K1e, 11K1e that extend radially outward at locations corresponding to specific orientations (in this example, three orientations at 120° intervals) around the vertical axis 11C.

[0033] The spray unit 12 includes a base housing 30M having the same elliptical planar shape as the main body housing 11M, and a cover member 31 that covers the base housing 30M. The cover member 31 is detachably fitted to the base housing 30M in the direction of the vertical axis 11C (from above in this example). The base housing 30M and the cover member 31 constitute the mounting housing 30.

[0034] In this example, the base housing 30M has an upper storage section 30Ma that protrudes upward in a cylindrical shape at a position eccentric to the left front side from the vertical axis 11C. The upper storage section 30Ma stores a horn vibrator 40 as a vibration section suitable for atomizing a liquid (in this example, a predetermined medicinal liquid). In this example, a mesh member 20 is placed on the top surface 30Mt of the upper storage section 30Ma in a state facing the horn vibrator 40. In this example, the mesh member 20 includes a sheet 21 including a mesh section suitable for atomizing the above-mentioned medicinal liquid, and a flange section 22 that supports the periphery of the sheet 21. The "mesh section" refers to an element that has a plurality of fine through holes in a sheet (or plate material) and atomizes the liquid by passing through these through holes. In this example, the mesh member 20 is disposable after one use. In this example, the horn vibrator 40 and the mesh member 20 constitute the atomization section. This allows the atomizing section to have the same configuration as that of a commercially available product, making the design easier.

[0035] A convex portion 30K1 having a substantially short cylindrical shape is provided in the center of the bottom wall 30Mb of the spray unit 12 (through which the vertical axis 11C passes) as an element for detachably attaching the main body 11 and the spray unit 12. In this example, the convex portion 30K1 has a shape corresponding to the concave portion 11K1 of the main body housing 11M. That is, the convex portion 30K1 is substantially cylindrical, and has an expanded diameter portion (not shown) protruding radially outward at a portion corresponding to a specific orientation around the vertical axis 11C (in this example, three orientations at intervals of 120°). Therefore, if the spray unit 12 (base housing 30M) is brought close to the main body 11 (main body housing 11M) in the direction of the vertical axis 11C (in this example, from above), the convex portion 30K1 fits into the concave portion 11K1, and the main body 11 and the spray unit 12 can be easily attached. Once the spray unit 12 is attached to the main body 11, the attached state is maintained by the frictional force between the concave portion 11K1 and the convex portion 30K1. If the user applies a force exceeding the frictional force to move the spray unit 12 away from the main body 11 in the direction of the vertical axis 11C, the spray unit 12 can be easily removed from the main body 11.

[0036] The cover member 31 has the same oval planar shape as the base housing 30M, and has a cylindrical outer shape extending in the direction of the vertical axis 11C. A circular opening 31o is provided in a portion of the top wall 31t of the cover member 31 that is eccentric toward the left front side from the vertical axis 11C. When the cover member 31 is attached to the base housing 30M, the edge of the opening 31o presses the flange portion 22 of the mesh member 20 in the direction of the vertical axis 11C (from above in this example). This positions the sheet 21 including the mesh portion relative to the horn vibrator 40. In addition, a mouthpiece 80 as a pipe member is detachably attached to the opening 31o from the outside of the cover member 31, as shown in FIG. 6, for example.

[0037] Furthermore, the cover member 31 has a lid portion 31a that can be opened and closed by a hinge at a portion of the top wall 31t that corresponds to the rear right side of the opening 31o, and a liquid reservoir 17 as a liquid supply portion provided directly below the lid portion 31a. With the cover member 31 attached to the base housing 30M, the user can temporarily open the lid portion 31a to pour a liquid medicine into the liquid reservoir 17 in this example.

[0038] Fig. 2 is a schematic side view of the internal structure of the nebulizer 1. Fig. 3 is a block diagram of the control system of the nebulizer 1. For ease of understanding, a small gap is provided between the base housing 30M and the main body housing 11M of the spray unit 12 in Fig. 2 to show the protrusion 30K1 of the base housing 30M. In Fig. 3, the gap between the base housing 30M and the main body housing 11M of the spray unit 12 is not intended.

[0039] As can be seen from FIG. 3, the main body 11 is equipped with and accommodates a control unit 60, an operation unit 50, an alarm unit 51, a power supply unit 53, and a power transmission coil unit 61 in a main body housing 11M. In this example, the control unit 60 includes a printed circuit board (PCB) and controls the operation of the entire nebulizer 1. The operation unit 50 includes the power switch 50A described above and inputs various instructions from the user, such as instructions to turn the power supply of the nebulizer 1 on and off. The power supply unit 53 includes a battery 54 in this example and supplies power to each unit (including the control unit 60) of the nebulizer 1. The control unit 60 and the power supply unit 53 are connected by wiring 55a, 55b. The power supply unit 53 may be one that converts commercial power and uses it. The alarm unit 51 includes the indicator lamps 51A, 51B described above and a buzzer (not shown), and displays the operating state of the nebulizer 1 and / or generates an alarm display or alarm sound. For example, the indicator lamp 51A indicates whether the power supply is on or off, and the indicator lamp 51B indicates the remaining charge of the battery 54.

[0040] 2, the power transmission coil unit 61 includes, in this example, a pole piece 64 made of a substantially cylindrical magnetic material, a yoke 65 made of a magnetic material including an end plate portion 65b in contact with the lower end of the pole piece 64 and an outer peripheral portion 65c that surrounds the outer peripheral surface of the pole piece 64 in a ring shape at a distance, a power transmission coil 62 wound around the pole piece 64 and disposed in the gap between the pole piece 64 and the yoke 65, and a sealing case 66 made of a non-magnetic material that integrally covers the pole piece 64, the yoke 65, and the power transmission coil 62. In this example, the power transmission coil unit 61 is disposed along the upper wall 11Mt of the main body housing 11M on the side facing the spray unit 12. As a result, the power transmission coil 62 is disposed in a specific region along the inside (wall surface) of the upper wall 11Mt that constitutes the main body housing 11M, that is, in the region 11a (the outer diameter of the region 11a is indicated by a double-headed arrow in FIG. 2) that surrounds the recess 11K1 centered on the vertical axis 11C. The power transmitting coil 62 is connected to the control unit 60 by wiring 63a and 63b. The power transmitting coil 62 is used to transmit the oscillation output from the control unit 60 to the spray unit 12 by wireless power transmission.

[0041] The spray unit 12 has a horn vibrator 40 as a vibration section and a power receiving coil unit 71 mounted and housed in a mounting housing 30 (particularly, a base housing 30M).

[0042] As shown in FIG. 2, the horn transducer 40 is configured by integrally combining a vibration surface 43 arranged horizontally facing upward, an ultrasonic transducer 41 arranged at a position spaced downward from the vibration surface 43, and a horn 42 arranged between the ultrasonic transducer 41 and the vibration surface 43 to amplify the vibration of the ultrasonic transducer 41 and transmit it to the vibration surface 43. When the cover member 31 is attached to the base housing 30M, a gap 43g exists between the sheet 21 including the mesh portion and the vibration surface 43 of the horn transducer 40. As described later, the liquid medicine contained in the liquid reservoir 17 is supplied to the gap 43g. The horn transducer 40 and the power receiving coil unit 71 (the power receiving coil 72) are connected by wiring 73a and 73b.

[0043] The power receiving coil unit 71 includes a pole piece 74 made of a substantially cylindrical magnetic material, a power receiving coil 72 wound around the pole piece 74, and a sealing case 75 made of a non-magnetic material that integrally covers the pole piece 74 and the power receiving coil 72. In this example, the power receiving coil unit 71 is disposed along the inside of the bottom wall 30Mb of the base housing 30M on the side facing the main body 11. As a result, the power receiving coil 72 is disposed in an area 12a (the outer diameter of the area 12a is indicated by a double-headed arrow in FIG. 2) that corresponds to the area 11a in which the power transmitting coil 62 of the main body housing 11M is disposed, along the inside (wall surface) of the bottom wall 30Mb that constitutes the base housing 30M.

[0044] As a result, when the main body 11 and the spray unit 12 are attached, the power transmitting coil 62 and the power receiving coil 72 are arranged in corresponding regions 11a, 12a between the top wall 11Mt of the main body housing 11M and the bottom wall 30Mb of the mounting housing 30. Therefore, during operation, the oscillation output from the control unit 60 can be efficiently transmitted from the main body 11 to the spray unit 12 via the power transmitting coil 62 and the power receiving coil 72 by the wireless power transmission method.

[0045] Fig. 4 shows various possible configurations of the power transmitting circuit 60C and the power receiving circuit 70C of the nebulizer 1. As shown in the table (left column) of Fig. 4, the primary circuit (power transmitting circuit) 60C of the nebulizer 1 can be of three types: an N type in which no capacitor is added to the power transmitting coil 62 (having inductive reactance L1), a P type in which a capacitor (having capacitive reactance C1) is added in parallel to the power transmitting coil 62, and an S type in which a capacitor (having capacitive reactance C1) is added in series to the power transmitting coil 62. Also, as shown in the top (upper row) of Fig. 4, the secondary circuit (power receiving circuit) 70C of the nebulizer 1 can be of three types: an N type in which only a horn vibrator 40 (having impedance Zx) is added in parallel to the power receiving coil 72 (having inductive reactance L2) as a load, and no capacitor is added; Receiving coil 72A P type in which a horn vibrator 40 and a capacitor (having a capacitive reactance C2) are added in parallel to the Receiving coil 72 and an S type in which a horn oscillator 40 and a capacitor (having capacitive reactance C2) are added in series to a primary circuit (power transmitting circuit) 60C. By combining the three types of primary circuit (power transmitting circuit) 60C with the three types of secondary circuit (power receiving circuit) 70C, the power transmitting circuit 60C and the power receiving circuit 70C of the nebulizer 1 can be configured in a total of nine types, including the NN type, NP type, NS type, PN type, PP type, PS type, SN type, SP type, and SS type, as shown in the table of FIG.

[0046] FIG. 5A shows a specific example of the configuration when the power transmitting circuit 60C and the power receiving circuit 70C of the nebulizer 1 are of the PP type.

[0047] In this example, the power transmission side circuit 60C includes the above-mentioned power transmission coil 62, a capacitor 69 (having a capacitive reactance C1) connected in parallel to the power transmission coil 62, a bridge IC (Integrated Circuit) 68 as an oscillator, a shunt resistor 67r connected to a power supply unit 53 (power supply voltage Vdd), and a shunt monitor unit 67m. In this example, the elements constituting the power transmission side circuit 60C (including the power transmission coil unit 61) are mounted together with the control unit 60 in a liquid-tight main body housing 11M. This can prevent these elements from being corroded by the chemical solution.

[0048] In this example, the capacitor 69 includes a plurality of capacitors 69a, 69b, ... that can be connected in parallel to the power transmitting coil 62. The plurality of capacitors 69a, 69b, ... are adjustable to a desired capacitive reactance in response to a switching signal (not shown) from the control unit 60. This allows the capacitor 69 to have a capacitive reactance in response to the switching signal from the control unit 60. Note that the capacitor 69 may include an element that can vary the capacitive reactance steplessly under electrical control from the control unit 60, such as a varicap (a variable capacitor that uses a depletion layer formed in a semiconductor as a dielectric, and the capacitive reactance can be changed depending on the magnitude of the reverse voltage).

[0049] In this example, a power transmitting coil 62 and a capacitor 69 configure a power transmitting side resonant circuit 60R. The resonant frequency fr1 of the power transmitting side resonant circuit 60R is substantially determined by the inductive reactance L1 of the power transmitting coil 62 and the capacitive reactance C1 of the capacitor.

[0050] The bridge IC 68 receives power supply from the power supply unit 53 (power supply voltage Vdd) via a shunt resistor 67r, and applies an AC voltage Vd corresponding to a signal Vfd representing an oscillation frequency from the control unit 60 to both ends of the power transmission coil 62 and the capacitor 69 constituting the power transmission side resonant circuit 60R. Here, as shown in FIG. 5B, the frequency signal Vfd representing the oscillation frequency from the control unit 60 is a digital signal having a rectangular waveform that alternates between a high (H) level and a low (L) level at an oscillation frequency fd. The bridge IC 68 creates an AC voltage Vd that alternates at the oscillation frequency fd, and applies it to both ends of the power transmission coil 62 and the capacitor 69 constituting the power transmission side resonant circuit 60R as power for power transmission. In response to the power supply from the bridge IC 68, the power transmission coil 62 and the capacitor 69 resonate at a resonance frequency fr1 (=fd) in this example, to generate an oscillation output PO, which is sent to the power receiving side circuit 70C.

[0051] During power transmission, as shown in FIG. 10A, for example, a current Is for driving the power transmission side resonant circuit 60R flows through the shunt resistor 67r (having a resistance value Rs) from the power supply unit 53 (power supply voltage Vdd) to the bridge IC 68 as time t passes. This causes a voltage Vs to drop across the shunt resistor 67r. A shunt monitor unit 67m shown in FIG. 5A monitors this voltage Vs and inputs a signal representing the current Is (=Vs / Rs) to the control unit 60. The control unit 60 also inputs a signal representing an oscillation voltage Vo in the power transmission side resonant circuit 60R through a signal line 60r connected to one end of the power transmission side resonant circuit 60R. In this example, the shunt resistor 67r, the shunt monitor unit 67m, and the signal line 60r constitute a detection unit that detects a voltage value and / or a current value for power transmission in the power transmission side circuit 60C. The control unit 60 can calculate the effective value of the current Is (referred to as the "effective current value Ie") and the effective value of the oscillation voltage Vo (referred to as the "effective voltage value Ve"). The control unit 60 can also calculate the product of the effective current value Ie and the effective voltage value Ve as the oscillation power PO (or an amount substantially equivalent to the oscillation power) in the power transmitting side circuit 60C.

[0052] In the example of Figure 5 (A), the power receiving side circuit 70C includes the already described power receiving coil 72, a capacitor 79 (having capacitive reactance C2) connected in parallel to the power receiving coil 72, and the already described horn vibrator 40 (in particular, the ultrasonic vibrator 41) connected in parallel to the power receiving coil 72 and the capacitor 79.

[0053] The ultrasonic transducer 41 of the horn transducer 40 is not shown because it is well known, but it has a piezoelectric ceramic and a pair of electrodes sandwiching the piezoelectric ceramic, and when a high-frequency voltage is applied between the pair of electrodes, the piezoelectric ceramic is ultrasonically vibrated. As shown in Fig. 5(C), the equivalent circuit of the ultrasonic transducer 41 is represented by a capacitive reactance Cd between the pair of electrodes, and a series-connected inductive reactance Lm, capacitive reactance Cm, and resistance component Rm connected in parallel to the capacitive reactance Cd. In this example, these elements Cd, Lm, Cm, and Rm are collectively represented as impedance Zx.

[0054] In this example, the power receiving coil 72, the capacitor 79, and the horn vibrator 40 configure the power receiving side resonant circuit 70R. The resonant frequency fr2 of the power receiving side resonant circuit 70R is determined by the inductive reactance L2 of the power receiving coil 72, the capacitive reactance C2 of the capacitor 79, and the impedance Zx of the horn vibrator 40. At the start of operation, the resonant frequency fr2 of the power receiving side resonant circuit 70R is set to 180 kHz.

[0055] As described at the beginning of this specification, in the above circuit configuration, the impedance Zx of the horn vibrator 40 (particularly the ultrasonic vibrator 41) as a load may change during power supply due to the influence of temperature fluctuations, etc., and the resonant frequency fr2 of the power receiving side resonant circuit 70R may change. The operation of the control unit 60 to deal with this will be described below.

[0056] (Nebulizer operation) A user who intends to use the nebulizer 1 mounts the spray unit 12 on the main body 11 and pours a liquid medicine suitable for the spray unit 12 into the liquid reservoir 17 of the mounted spray unit 12. This causes the liquid medicine in the liquid reservoir 17 to be supplied to the gap 43g (see FIG. 2) between the sheet 21 and the vibration surface 43 of the horn transducer 40. The user also mounts the mouthpiece 80 on the opening 31o of the spray unit 12. Next, as shown in FIG. 6, the user 99 tilts the entire nebulizer 1 forward, brings the mouthpiece 80 close to the mouth, and holds it in the mouth. In this state, the user 99 turns on the power switch 50A provided on the front surface 11Ms of the main body 11.

[0057] Then, the control unit 60 executes the control shown in the operation flow (main flow) of FIG.

[0058] First, as shown in step S1 of FIG. 7, the control unit 60 performs initial settings.

[0059] In this example, as described above, the resonant frequency fr2 (initial value is fr20) of the power receiving resonant circuit 70R in the spray unit 12 is 180 kHz at the start of operation. Then, for example, as shown in FIG. 9(A) (horizontal axis represents frequency f, vertical axis represents current effective value Ie, voltage effective value Ve), when the oscillation frequency fd (i.e., the resonant frequency fr1 of the power transmitting resonant circuit 60R) coincides with the resonant frequency fr2 (initial value fr20) of the power receiving resonant circuit 70R, the current effective value Ie for driving the power transmitting resonant circuit 60R shows a peak. The voltage effective value Ve shows a steep change when the oscillation frequency fd is swept across the resonant frequency fr2 (=fr20). Therefore, the control unit 60 can find the resonant frequency fr2 (initial value fr20) of the receiving side resonant circuit 70R by calculating, for example, the ratio between the effective voltage value Ve and the effective current value Ie (voltage / current ratio) for each oscillation frequency fd as a relationship between voltage and current.

[0060] Accordingly, the control unit 60 adjusts the capacitive reactance of the capacitor 69 by the switching signal to match the resonant frequency fr1 of the power transmitting side resonant circuit 60R with fr20 in this example. This brings the power transmitting side resonant circuit 60R and the power receiving side resonant circuit 70R into a tuned state. Then, the process returns to the main flow of FIG. 7.

[0061] Next, in step S2 of FIG. 7, the control unit 60 starts the spraying operation. Specifically, the control unit 60 generates an oscillation output PO having an oscillation frequency fd set to a target frequency (fr20 in this example). This oscillation output PO is transmitted from the power transmission coil 62 to the power receiving coil 72 for the atomization unit (the atomization unit constituted by the horn vibrator 40 and the mesh member 20 in this example) by wireless power transmission using magnetic coupling. As a result, the oscillation output PO is applied to the horn vibrator 40, and the above-mentioned atomization unit atomizes the medicinal liquid. As shown in FIG. 6, the atomized medicinal liquid becomes an aerosol 90, which is inhaled by the user 99 through the mouthpiece 80 in this example.

[0062] During the spraying operation (power supply), the control unit 60 performs a feedback process as shown in step S3 of Fig. 7. Specifically, as shown in step S21 of Fig. 8(A), the control unit 60 determines whether or not the resonant frequency fr2 of the power receiving side resonant circuit 70R has shifted from the currently set oscillation frequency fd based on the voltage-current relationship (in this example, the voltage / current ratio) in the power transmitting side circuit 60C as shown in Fig. 9(A).

[0063] Here, if the resonant frequency fr2 of the power receiving side resonant circuit 70R matches the currently set oscillation frequency fd (NO in step S21 in FIG. 8A), the process returns directly to the main flow in FIG. 7. On the other hand, if the resonant frequency fr2 of the power receiving side resonant circuit 70R deviates even slightly from the currently set oscillation frequency fd (YES in step S21 in FIG. 8A), the control unit 60 corrects the oscillation frequency fd as shown in step S22.

[0064] Specifically, for example, as shown in FIG. 9B, the resonant frequency fr2 of the power receiving side resonant circuit 70R is shifted by Δfr2 from an initial value fr20 to another value (fr21 in this example). At this time, the control unit 60 matches the oscillation frequency fd to the other value fr21 as shown in FIG. 9C based on the voltage-current relationship (voltage / current ratio in this example) in the power transmitting side circuit 60C. More specifically, for example, the control unit 60 shifts the oscillation frequency fd in a direction in which the effective current value Ie increases and / or the effective voltage value Ve decreases, thereby decreasing the voltage / current ratio. Note that the shift in the resonant frequency fr2 of the power receiving side resonant circuit 70R may cause a shift in the phase angle between the oscillation current Io (=Is) and the oscillation voltage Vo in the power transmitting side resonant circuit 60R, as shown in FIG. 10A to FIG. 10B. Therefore, the control unit 60 may shift the oscillation frequency fd in a direction in which the phase difference (phase angle) between the oscillation current Io and the oscillation voltage Vo becomes smaller. Accordingly, the control unit 60 adjusts the capacitive reactance of the capacitor 69 by a switching signal to match the resonance frequency fr1 of the power transmitting side resonant circuit 60R with fr21 in this example. This causes the power transmitting side resonant circuit 60R and the power receiving side resonant circuit 70R to return to a tuned state. This makes it possible to prevent a decrease in the efficiency of power transmission from the power transmitting side circuit 60C to the power receiving side circuit 70C. Then, Figure 7 Return to the main flow.

[0065] Also, in step S3 of FIG. 7, the control unit 60 performs a power feedback process. Specifically, as shown in step S31 of FIG. 8B, the control unit 60 measures the current oscillation power PO in the power transmission side circuit 60C. That is, the control unit 60 calculates the product of the current effective value Ie and the voltage effective value Ve as the current oscillation power PO in the power transmission side circuit 60C. Next, as shown in step S32, the control unit 60 judges whether the oscillation power PO deviates from a predetermined target power value POtarget (for example, a value determined as a product specification of the nebulizer). For example, if the current oscillation power PO is within a range of ±5% from the target power value POtarget, the control unit 60 judges that the current oscillation power PO in the power transmission side circuit 60C is within the allowable range (YES in step S32 of FIG. 8B). Then, the process returns directly to the main flow of FIG. 7. On the other hand, if the current oscillation power PO deviates from the target power value POtarget by more than ±5% (NO in step S32 in FIG. 8(B)), it is determined that the current oscillation power PO in the power transmitting side circuit 60C is outside the allowable range (error). Then, as shown in step S33, the control unit 60 adjusts the amplitude of the AC voltage Vd that the bridge IC 68 applies to the power transmitting side resonant circuit 60R (both ends of the power transmitting coil 62 and the capacitor 69) so that the current oscillation power PO falls within the allowable range. This makes it possible to maintain the oscillation power PO in the power transmitting side circuit 60C within the allowable range of the target power value POtarget. Then, the process returns to the main flow in FIG. 7.

[0066] Next, in step S4 of FIG. 7, the control unit 60 determines whether the error has continued for n control periods.

[0067] In this example, one control cycle of the control unit 60 (a cycle for repeating steps S2 to S6 in FIG. 7) is 10 milliseconds, n=3, and therefore a period corresponding to n control cycles is 30 milliseconds. An "error" means that the effective voltage value Ve in the power transmitting circuit 60C exceeds a predetermined specified value, the effective current value Ie in the power transmitting circuit 60C falls below a predetermined specified value, and / or the oscillation power PO deviates from the target power value POtarget by exceeding an allowable range.

[0068] Here, if the error does not continue (NO in step S4 in FIG. 7), the control unit 60 returns to step S2 to continue the spraying operation unless the user performs an end operation (turns off the power switch 50A) (NO in step S6). On the other hand, if the error continues for n control cycles (YES in step S4 in FIG. 7), the control unit 60 proceeds to step S5, where the notification unit 51 outputs an alarm signal indicating the occurrence of an error to notify the user. The notification unit 51 displays an alarm by, for example, flashing the already-mentioned indicator lamp 51A or 51B, and / or generates an alarm sound by a buzzer (not shown).

[0069] This allows the user to know that an error has occurred, and the user can take appropriate measures, such as stopping (turning off) the spraying operation of nebulizer 1 and restarting it, or, if errors occur frequently, request repairs from the manufacturer's service department.

[0070] Thereafter, when the user performs an end operation (YES in step S6), the spraying operation ends.

[0071] Thus, with this nebulizer 1, even if the impedance Zx of the horn transducer 40 (particularly the ultrasonic transducer 11) changes during power supply (spraying operation), it is possible to prevent a decrease in the efficiency of power transmission from the power transmitting circuit 60C to the power receiving circuit 70C. As a result, the atomization section including the horn transducer 40 can stably atomize and spray the supplied liquid using the received oscillation output PO.

[0072] (Modification) In the above example, the case where the power transmitting circuit 60C and the power receiving circuit 70C of the nebulizer 1 are of the PP type has been described, but the present invention is not limited to this. The power transmitting circuit 60C and the power receiving circuit 70C of the nebulizer 1 may have various configuration examples as shown in FIG. 4. For example, when the power transmitting circuit 60C and the power receiving circuit 70C of the nebulizer 1 are of the NS type or the NP type, as shown in FIG. 11(A), the relationship between the oscillation frequency fd at the start of operation (power supply) and the effective current value Ie and the effective voltage value Ve in the power transmitting circuit 60C is obtained. This relationship is considered to be basically the same as the relationship shown in FIG. 9(A). That is, in the NS type or the NP type, the power transmitting resonant circuit 60R is not provided in the power transmitting circuit 60C, so that the oscillation frequency fd is swept under the condition that the effective voltage value Ve is constant. At this time, in Fig. 11(A), similarly to Fig. 9(A), when the oscillation frequency fd coincides with the resonance frequency fr2 (initial value fr20) of the power receiving side resonance circuit 70R, the effective current value Ie for driving the power transmitting side resonance circuit 60R peaks. Note that the ratio Z of the effective voltage value Ve to the effective current value Ie (voltage / current ratio) shows a steep change when the oscillation frequency fd is swept across the resonance frequency fr2 (=fr20). Therefore, the control unit 60 can similarly execute the operation flow of Fig. 7 (including the frequency feedback process of Fig. 8(A) and the power feedback process of Fig. 8(B)).

[0073] For example, in FIG. 11(A), the control unit 60 can find the resonant frequency fr2 (initial value fr20) of the receiving side resonant circuit 70R by calculating, for example, the ratio Z of the effective voltage value Ve to the effective current value Ie for each oscillation frequency fd as the voltage-to-current relationship (step S1 in FIG. 7).

[0074] Also, during the spraying operation (power supply), the impedance Zx of the horn vibrator 40 (particularly the ultrasonic vibrator 41) as a load changes, and the resonant frequency fr2 of the power receiving side resonant circuit 70R shifts from the initial value fr20 to another value (in this example, fr21) by Δfr2, as shown in Fig. 11(C), for example. At this time, the control unit 60 can match the oscillation frequency fd to the above-mentioned other value fr21, similarly to the case shown in Fig. 9(C), based on the voltage-current relationship (in this example, the voltage / current ratio) Z in the power transmitting side circuit 60C (step S22 in Fig. 8(A)).

[0075] Also, during spraying (power supply), the impedance Zx of the horn transducer 40 (particularly the ultrasonic transducer 41) as a load increases, and the peak of the effective current value Ie in the power transmission side circuit 60C changes from the initial value Iep0 to a smaller value Iep1, as shown in Fig. 11(B). At this time, the control unit 60 calculates the product of the effective current value Ie and the effective voltage value Ve as the current oscillation power PO in the power transmission side circuit 60C, and can determine whether the oscillation power PO has deviated from a predetermined target power value POtarget (steps S31 to S32 in Fig. 8(B)).

[0076] When the impedance Zx of the horn transducer 40 (particularly the ultrasonic transducer 41) as a load increases, the resonance frequency fr2 of the power receiving side resonance circuit 70R may shift (in the example of FIG. 11B, the resonance frequency fr2 shifts from the initial value fr2 to fr20′). This shift can be handled by the process of step S22 in FIG. 8A described above.

[0077] In the example of Figure 4 described above, the power transmitting circuit 60C and the power receiving circuit 70C of the nebulizer 1 can be configured in a total of nine types, including the NN type, NP type, NS type, PN type, PP type, PS type, SN type, SP type, and SS type. However, this is not limited to this. For example, in the table of Figure 4, a configuration that combines the features of the NP type shown in the upper center and the NS type shown in the upper right side is also possible. For example, Receiving coil 72A first capacitor is added in parallel to Receiving coil 72 and the first capacitor in parallel, and a second capacitor and the horn vibrator 40 are added in series. Receiving coil 72 A first capacitor is added in series with Receiving coil 72 A configuration in which a second capacitor and horn vibrator 40 are added in parallel to the series connection of the first capacitor and the second capacitor may be used. The combination of these NP and NS methods is expected to provide the same (or better) performance as the single method.

[0078] In the above embodiment, a mesh-type nebulizer has been described, but the present invention is not limited to this. Nebulizer can also be applied to so-called two-tank ultrasonic nebulizers (i.e., a drug tank is immersed in a cooling water tank facing an ultrasonic transducer, and ultrasonic vibration energy generated from the ultrasonic transducer is concentrated on the drug liquid surface through the cooling water, and the drug liquid is atomized by the action of vibration (cavitation effect)). 。

[0079] The above-mentioned embodiments are merely examples, and various modifications are possible without departing from the scope of the present invention. The above-mentioned embodiments can be realized independently, but the embodiments can also be combined with each other. In addition, the various features of the different embodiments can be realized independently, but the features of the different embodiments can also be combined with each other. [Explanation of symbols]

[0080] 1 Nebulizer 11 Main unit 11M main body 12 Spray unit 20 Mesh material 21 sheets 30 Mounting housing 30M Base Chassis 31 Cover member 40 Horn Transducer 60 Control section 61 Power transmission coil unit 71 Receiving coil unit

Claims

1. A nebulizer that atomizes and sprays a liquid, The device includes a lower body and an upper body that is combined with the lower body, The lower part of the main body is equipped with a power supply unit, an oscillation unit that receives power from the power supply unit and generates an oscillation output, and a power transmission side circuit for transmitting the oscillation output to the upper part of the main body, The upper part of the main body is equipped with a power receiving circuit for receiving the oscillation output, and an atomization unit including an ultrasonic vibrator configured to atomize a supplied liquid using the received oscillation output, A nebulizer including a power supply system that wirelessly supplies power from the power transmitting circuit to the power receiving circuit, the power transmitting side circuit includes a power transmitting coil, and transmits power to the power receiving side circuit through the power transmitting coil at a certain oscillation frequency; In the power receiving side circuit, a power receiving coil and the ultrasonic transducer as a load including a capacitive reactance configure a power receiving side resonant circuit, and a resonant frequency of the power receiving side resonant circuit is determined. a control unit that controls the oscillation frequency so as to maintain power transmission efficiency from the power transmitting circuit to the power receiving circuit when the resonant frequency of the power receiving side resonant circuit changes as the impedance including the capacitive reactance of the ultrasonic transducer changes during power supply. A nebulizer characterized by:

2. 2. The nebulizer of claim 1, The control unit is a detection unit that detects a voltage value and / or a current value for power transmission in the power transmission side circuit, When starting power supply, the oscillation frequency in the power transmitting side circuit is made to coincide with the resonant frequency of the power receiving side resonant circuit; when the impedance of the power receiving side circuit changes in accordance with the change in the load during power supply, the change in the impedance of the power receiving side circuit is detected by the detection unit in accordance with the voltage value and / or the current value in the power transmitting side circuit; The oscillation frequency is controlled so as to maintain the power transmission efficiency based on the detection result by the detection unit. A nebulizer characterized by:

3. 2. The nebulizer of claim 1, In the power transmission side circuit, the power transmission coil and a capacitor configure a power transmission side resonant circuit, and a resonant frequency of the power transmission side resonant circuit is the oscillation frequency, When the resonant frequency of the power receiving side resonant circuit changes in accordance with the change in the load during power supply, the control unit controls the resonant frequency of the power transmitting side resonant circuit so as to maintain a tuned state between the power transmitting side resonant circuit and the power receiving side resonant circuit. A nebulizer characterized by:

4. 4. The nebulizer of claim 3, The control unit is a detection unit that detects a voltage value and / or a current value for power transmission in the power transmission side circuit, At the start of power supply, a resonant frequency of the power transmitting side resonant circuit is made to coincide with an initial value of a resonant frequency of the power receiving side resonant circuit, so that the power transmitting side resonant circuit and the power receiving side resonant circuit are in a tuned state; detects, by the detection unit, that the impedance of the power receiving side circuit has changed due to the change in the load during power supply, and that the resonant frequency of the power receiving side resonant circuit has shifted from the initial value to another value, according to the voltage value and / or the current value in the power transmitting side circuit; Based on the detection result by the detection unit, the resonant frequency of the power transmitting side circuit is controlled so as to coincide with the different value, thereby maintaining a tuned state between the power transmitting side resonant circuit and the power receiving side resonant circuit. A nebulizer characterized by:

5. 5. The nebulizer of claim 2 or 4, the control unit calculates a current oscillation power in the power transmitting side circuit based on the voltage value and the current value detected by the detection unit; When the impedance of the power receiving circuit changes with the change in the load during power supply, causing the oscillation power to deviate from a predetermined target power value, the oscillation power is adjusted so that the oscillation power becomes the target power value. A nebulizer characterized by:

6. 6. The nebulizer of claim 2, 4 or 5, The control unit is determining whether an error has occurred in which the voltage value in the power transmitting side circuit exceeds a predetermined specified value, the current value in the power transmitting side circuit falls below a predetermined specified value, and / or an oscillation power, which is a product of the voltage value and the current value, falls outside a predetermined allowable range; When the error continues for a predetermined period of time, an alarm signal is output to notify the user of the error. A nebulizer characterized by:

7. 7. The nebulizer according to claim 1, The control unit is mounted on the bottom of the main unit. A nebulizer characterized by:

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