humidifier

Abstract

To provide a superior humidifier. [Solution] A humidifier according to one aspect of the present invention comprises: a water storage section for storing water; an atomizing section disposed at the bottom of the water storage section for atomizing the water stored in the water storage section and generating mist; a duct disposed around the atomizing section in the water storage section, dividing the water storage section into a space where the atomizing section is located and a space outside the atomizing section, and having a first flow path extending upward; and a heating section disposed in the water storage section for heating the water. The duct has a lower end that contacts the bottom. The lower end has a structure for supplying the water heated by the heating section to the atomizing section.

Description

Technical Field

[0001] The present invention relates to a humidifier.

Background Art

[0002] Conventionally, various types of humidifiers such as heating type, ultrasonic type, and hybrid type have been proposed. For example, the humidifier disclosed in Patent Document 1 includes a main body, an air suction port disposed at the lower part of the main body, a blowout port disposed at the upper part of the main body, a tank disposed in the main body and supplying water, a pool capable of storing the water supplied from the tank, a heating part that heats the water in the pool to generate steam, and a mist generating part that atomizes the water in the pool, a humidifying part including the above, an opening that guides the air inhaled from the suction port to the heating part side, a blower part that sends out the air heated by the heating part after passing through the opening, a first air passage forming part in which an air passage through which the air blown by the blower part flows is formed, and a second air passage forming part in which an air passage through which the mixed air of the air from the first air passage forming part, the steam and mist generated by the humidifying part flows and is guided to the blowout port is formed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] For example, in an ultrasonic humidifier, in order to atomize room - temperature water, there are hygienic problems such that various bacteria breeding in the water in the water tank fly into the room together with the mist and pollute the indoor environment. In particular, if the water in the atomizing water tank remains stored after the operation stops, there is a possibility that various bacteria will breed. In an ultrasonic humidifier, if the particle size of the atomized water is large, there is a comfort problem that the periphery of the humidifier is likely to get wet and is easy to get moist.

[0005] Furthermore, heated humidifiers have economic drawbacks, such as the high power consumption required for heating the entire water tank using a heater. Hybrid humidifiers have maintenance issues, such as difficulty in cleaning the water tank if the heater is separated from the rest of the unit. In addition to these, there are various other areas where humidifiers need improvement.

[0006] Therefore, one of the objectives of the present invention is to provide a superior humidifier. [Means for solving the problem]

[0007] A humidifier according to one aspect of the present invention is It has a bottom portion and a wall portion extending upward from the bottom portion, A storage section for storing water, and the front bottom of record A atomizing unit is located in the storage unit and atomizes the water stored in the storage unit to generate mist, and in the storage unit, around the atomizing unit Removable Placed ,above The system comprises a duct having a first flow path extending in the direction, and a heating unit disposed in the storage unit for heating the water. The duct has a lower end that contacts the bottom, The storage section is divided into the space inside the duct where the atomizing section is located and the space between the duct and the wall for storing water. The lower end portion is The contents are stored between the duct and the wall. The structure is such that the water heated by the heating unit is supplied to the atomizing unit.

[0008] The aforementioned structure may have an opening at its lower end that penetrates the duct. The water The opening When supplied to the atomizing section via the heating section, mist may be generated by the atomizing section. The heating section is The bottom between the duct and the wall It is arranged in the storage section and stored in the storage section. The aforementioned It may have at least one heating element capable of heating water.

[0009] The humidifier may further include a blower for sending the mist to the outside. The storage unit may be connected to the first flow path of the duct and have an outlet for blowing out the air sent from the blower.

[0010] The humidifier may further include a reflector positioned at the upper end of the duct, which causes the mist that has passed through the first flow path to form a swirling flow about the axis of the duct. The reflector may have a plurality of guide sections arranged in the circumferential direction about the axis. Each of the plurality of guide sections may have a discharge port that opens in the circumferential direction.

[0011] The humidifier may further include a tank body positioned above the storage section and supplying the water to the storage section. The tank body includes a second flow path connected to the first flow path. implied , the inner circumference extending upward department It is acceptable to have it. The reflector may be positioned inside the inner circumference. A portion of the mist passing through the second flow path while swirling due to the reflector may collide with the inner surface of the inner circumference. The tank body may further have a nozzle positioned at the upper end of the inner circumference. The nozzle may include a baffle plate that obstructs the upward movement of the mist. In the inner circumference, the reflector and the baffle plate may be arranged in this order in the upward direction. The mist may be released to the outside by passing through the gap formed between the inner circumference and the baffle plate. The humidifier may be further equipped with a water supply valve positioned between the tank body and the storage section, and to supply water from the tank body to the storage section in conjunction with the water level of the water stored in the storage section. The humidifier may also be further equipped with a cartridge positioned between the tank body and the storage section, for purifying the water in the tank body. The cartridge may have the water supply valve.

[0012] The humidifier may further include a control unit for controlling the atomizing unit and the heating unit, and a water temperature detection unit for detecting the temperature of the water stored in the storage unit. The control unit is During humidification operation or when humidification operation is stopped In the water heating step by the heating unit, the heating step may be completed if the water temperature detected by the water temperature detection unit remains at or above a first temperature for a first time. After the completion of the heating step, the control unit may start operating the heating unit to begin the next heating step after a second time has elapsed since the heating step.

[0013] The control unit determines that the target value of the water atomized per unit time by the atomizing unit is Do not exceed the amount suitable for heating operation. A first amount, in which the first amount does not change during the heating process of the water by the heating unit, and a second amount, in which the target value of the water atomized per unit time by the atomizing unit is greater than the first amount, and the target value of the water atomized per unit time during the heating process is less than the second amount. Suitable for heating operationsIt may have a second mode limited in quantity, and a third mode in which the control unit has a target value of the water atomized per unit time by the atomizing unit being a third quantity greater than the second quantity and the heating unit is not operated.

Advantages of the Invention

[0014] According to the present invention, a more excellent humidifier can be provided.

Brief Description of the Drawings

[0015] [Figure 1] FIG. 1 is a schematic perspective view of a humidifier according to an embodiment. [Figure 2] FIG. 2 is a schematic perspective view of a humidifier according to an embodiment. [Figure 3] FIG. 3 is a schematic exploded perspective view of a humidifier according to an embodiment. [Figure 4] FIG. 4 is a schematic cross-sectional view of the tank body shown in FIG. 3. [Figure 5] FIG. 5 is a schematic perspective view of the cartridge shown in FIG. 3. [Figure 6] FIG. 6 is a schematic perspective view of the cartridge shown in FIG. 3. [Figure 7] FIG. 7 is a schematic perspective view of the nozzle shown in FIG. 3. [Figure 8] FIG. 8 is a schematic perspective view of the main body portion shown in FIG. 3. [Figure 9] FIG. 9 is a schematic perspective view of the main body portion shown in FIG. 3. [Figure 10] FIG. 10 is a schematic perspective view of the main body portion shown in FIG. 3. [Figure 11] FIG. 11 is a schematic perspective view of the duct and the reflector shown in FIG. 8. [Figure 12] FIG. 12 is a schematic cross-sectional view of the duct and the reflector. <0​​​​Figure 14 is a schematic cross-sectional view along the line XIV-XIV in Figure 1. [Figure 15] Figure 15 is a schematic cross-sectional view along the line XV-XV in Figure 1. [Figure 16] Figure 16 is a schematic perspective cross-sectional view along the line XVI-XVI in Figure 1. [Figure 17] Figure 17 is a diagram illustrating the flow of mist. [Figure 18] Figure 18 is a schematic front view of the operating section in one embodiment. [Figure 19A] Figure 19A is a flowchart showing an example of a heating process in one embodiment. [Figure 19B] Figure 19B is a flowchart showing the heating process following Figure 19A. [Figure 20A] Figure 20A is a flowchart showing an example of a heating process in one embodiment. [Figure 20B] Figure 20B is a flowchart showing the heating process following Figure 20A. [Figure 21] Figure 21 is a diagram illustrating the heating process. [Modes for carrying out the invention]

[0016] One embodiment of the present invention will be described below with reference to the drawings. In order to make the explanation clearer, the size, shape, etc. of each part may be schematically represented in the drawings with modifications from the actual embodiment.

[0017] In this embodiment, an ultrasonic humidifier is disclosed as an example of a humidifier. However, the configuration and control disclosed in this embodiment can also be applied to other types of humidifiers.

[0018] Figures 1 and 2 are schematic perspective views of the humidifier 1000 according to this embodiment. In Figure 2, the humidifier 1000 is viewed from a different direction than in Figure 1.

[0019] The humidifier 1000 comprises a tank section 100 and a main body section 200. The tank section 100 is detachably mounted on top of the main body section 200. The tank section 100 and the main body section 200 are aligned along axis CX. Here, one direction along axis CX is defined as the upward direction U, and the other as the downward direction D. Hereafter, viewing the various elements along the downward direction D will be referred to as a plan view.

[0020] The external shapes of the tank section 100 and the main body section 200 are, for example, circular with axis CX as the center. However, the external shapes of the tank section 100 and the main body section 200 are not limited to circular shapes; they may be elliptical, oblong, polygonal, or any other shape. Furthermore, in this embodiment, the external shapes of the tank section 100 and the main body section 200 are formed to be circular, but the external shapes of the tank section 100 and the main body section 200 may be different from each other.

[0021] The main body 200 has an air intake port 200A (shown in Figure 2) on its bottom surface for drawing in air. The tank 100 has an outlet port 100A (shown in Figure 1) on its top surface for releasing the mist generated in the atomizing unit described later, along with the air drawn in from the air intake port 200A.

[0022] Figure 3 is a schematic exploded perspective view of the humidifier 1000 in this embodiment. As described above, the humidifier 1000 comprises a tank section 100 and a main body section 200. The tank section 100 comprises a tank body 11, a lid 12, a nozzle 13, and a cartridge 14.

[0023] The tank body 11 stores the water necessary for humidification. The tank body 11 is made of, for example, a transparent resin material. Here, "transparent" means that it transmits light to a degree that the water inside the tank body 11 can be seen, and is not limited to colorless transparency, but also includes colored transparency and translucency. This allows the user to visually check the amount of water stored in the tank body 11 from the outside. In addition, since the tank body 11 is removable from the main body 200, the user can easily remove the tank body 11 from the main body 200 and perform maintenance such as cleaning.

[0024] As shown in Figure 3, the main unit 200 further comprises a housing 21, a storage unit 22, a duct 23, a reflector 24, a heating unit 31, a solenoid valve 32, an atomizing unit 33, a blower unit 34, an operating unit 35, a light-emitting unit 36, a power supply unit 37, a water level detection unit 41, a temperature and humidity detection unit 42, a water temperature detection unit 43, and a control unit 50.

[0025] The housing portion 21 is formed of, for example, a resin material, but may include a portion formed of a metal material. The housing portion 21 has a bottom plate 211 and an outer case 213. The bottom plate 211 has the above-mentioned air intake port 200A (shown in Figure 2).

[0026] The bottom plate 211 may be provided with a filter 2111 to suppress the suction of foreign matter from the air intake port 200A. In addition, the underside of the bottom plate 211 may be provided with a plurality of rubber feet 2113 to suppress the humidifier 1000 from sliding on the installation surface.

[0027] The outer case 213 may have two recesses 2131 that are recessed toward the axis CX. The recesses 2131 function as handles. This allows the user to easily carry the humidifier 1000 by placing their hands on the recesses 2131.

[0028] The storage section 22 stores water supplied from the tank body 11 located above the storage section 22. In this embodiment, the water stored in the storage section 22 is heated or atomized. The storage section 22 is located inside the upper part of the outer case 213. The capacity of the storage section 22 is, for example, 300 mL to 500 mL. The duct 23 is located inside the storage section 22, and the reflector 24 is located at the upper end of the duct 23. The reflector 24 is a component that has the function of changing the direction of airflow.

[0029] The heating unit 31, solenoid valve 32, atomizing unit 33, blower unit 34, operation unit 35, light-emitting unit 36, power supply unit 37, water level detection unit 41, temperature and humidity detection unit 42, water temperature detection unit 43, and control unit 50 are housed between the housing unit 21 and the storage unit 22.

[0030] The heating unit 31 heats the water stored in the storage unit 22. The heating unit 31 is equipped with at least one heating element. In this embodiment, the heating unit 31 is equipped with a plurality (for example, two) of PTC heaters 311, 313 as heating elements. The heating elements are not limited to PTC heaters, but may be ceramic heaters, induction heating elements, film heaters, carbon heaters, etc. Also, the number of heating elements equipped in the heating unit 31 may be one or three or more.

[0031] The atomizing unit 33 atomizes the water stored in the storage unit 22. The atomizing unit 33 is equipped with an ultrasonic transducer, which will be described later. The atomizing unit 33 generates mist-like particles through vibration by the ultrasonic transducer. Hereinafter, the group of particles generated by the atomizing unit 33 may be referred to as mist. In other words, the atomizing unit 33 generates mist.

[0032] The air blower 34 sends air drawn in from the intake port 200A (shown in Figure 2) toward the duct 23 in order to release the mist to the outside. The air blower 34 includes a fan 341 (for example, a sirocco fan) and a fan cover 343. The solenoid valve 32 is configured to operate in conjunction with the water level of the water stored in the storage unit 22.

[0033] The water level detection unit 41 detects the water level stored in the storage unit 22. The water level detection unit 41 has a sensor board 411 which includes a sensor. The sensor board 411 is electrically connected to the control unit 50 and transmits a detection signal from the sensor to the control unit 50. The water level detection unit 41 is arranged along the wall of the storage unit 22. The water level detection unit 41 is, for example, a capacitive water level sensor, but other types of detection means may also be used.

[0034] The temperature and humidity detection unit 42 detects the temperature and humidity around (outside) the humidifier 1000. The temperature and humidity detection unit 42 has a sensor board 421 that includes a sensor. The sensor board 421 is electrically connected to the control unit 50 and transmits detection signals from the sensor to the control unit 50. The temperature and humidity detection unit 42 is located, for example, near the air intake port 200A. The temperature and humidity detection unit 42 is, for example, a MEMS (Micro-Electro-Mechanical Systems) type temperature and humidity sensor, but other types of detection means may also be used.

[0035] The water temperature detection unit 43 detects the temperature of the water stored in the storage unit 22. The water temperature detection unit 43 is located, for example, near the bottom of the storage unit 22. The water temperature detection unit 43 is a temperature sensor composed of, for example, an NTC element, but other types of detection means may also be used.

[0036] In one example, the light-emitting section 36 is a light guide plate including an LED. In the example shown in Figure 3, the light-emitting section 36 is arranged to surround the storage section 22. The light-emitting section 36 illuminates the tank section 100 from below within the main body section 200.

[0037] The control unit 50 includes a CPU, program memory, working RAM, and non-volatile memory. The program memory stores a program that controls the operation of the humidifier 1000, and the CPU reads and executes this program to perform various processes (for example, humidification operation, heating operation, etc.).

[0038] Here, humidification operation refers to the state in which the atomizing unit 33 is operating to generate mist, and the blowing unit 34 is operating to release the generated mist to the outside. Heating operation refers to the state in which the heating unit 31 is operating to heat the water in the storage unit 22.

[0039] The control unit 50 is electrically connected to and controllable with the heating unit 31, solenoid valve 32, atomizing unit 33, blowing unit 34, operating unit 35, light-emitting unit 36, power supply unit 37, water level detection unit 41, temperature and humidity detection unit 42, and water temperature detection unit 43.

[0040] The control unit 50 controls each element (for example, the heating unit 31, solenoid valve 32, atomizing unit 33, blower unit 34, and light-emitting unit 36) by the user operating the operation unit 35, or controls each element based on various information. Here, the information includes the water level in the storage unit 22 acquired by the water level detection unit 41, the humidity around the humidifier 1000 acquired by the temperature and humidity detection unit 42, the water temperature acquired by the water temperature detection unit 43, and information regarding the operating status of the heating unit 31, atomizing unit 33, and blower unit 34.

[0041] The power supply unit 37 receives power supplied from an external source via the power cord 371 (shown in Figure 2), converts it to the voltage required for each element, stabilizes it, and supplies it. The power supply unit 37 is, for example, mounted as a power supply circuit on the same printed circuit board as the control circuit that constitutes the control unit 50, but is not limited to this example.

[0042] Figure 4 is a schematic cross-sectional view of the tank body 11 shown in Figure 3. Figures 5 and 6 are schematic perspective views of the cartridge 14 shown in Figure 3. Figure 7 is a schematic perspective view of the nozzle 13 shown in Figure 3.

[0043] As shown in Figure 4, the tank body 11 has an outer circumference 111, an inner circumference 113, a bottom 115, and a cartridge mounting portion 117. The outer circumference 111, inner circumference 113, bottom 115, and cartridge mounting portion 117 are formed, for example, as a single unit.

[0044] The outer circumferential portion 111 and the inner circumferential portion 113 are formed in a cylindrical shape extending upward U from the bottom portion 115. The outer circumferential portion 111 and the inner circumferential portion 113 have, for example, a cylindrical shape, but may also have a polygonal shape. The axis CX coincides with the centerline of the tank body 11.

[0045] One end of the outer periphery 111 is closed by the bottom 115, while the other end is open. A cover 12 (shown in Figure 3) is placed at the other end. The cover 12 covers the entire other end. The outer periphery 111 extends upward in the U direction with a uniform diameter.

[0046] The inner circumference 113 is located in the center of the bottom 115. The inner diameter of the inner circumference 113 is formed to decrease as it progresses along the upward direction U, for example, but is not limited to this example. One end 113a of the inner circumference 113 opens downward D, and the other end 113b (upper end) opens upward U.

[0047] In the tank body 11, water is stored in the space formed by the outer circumference 111, the inner circumference 113, and the bottom 115. The capacity of the tank body 11 is, for example, 3.0L to 6.0L. The tank body 11 has a water inlet 115A that penetrates the bottom 115. The water inlet 115A is formed in a cylindrical shape that protrudes downward D from the bottom 115.

[0048] The cartridge mounting portion 117 is formed in a cylindrical shape (e.g., cylindrical) extending downward D from the bottom portion 115 along the axis CX. The cartridge 14 functions as a means of purifying water. The cartridge 14 is removably mounted inside the cartridge mounting portion 117.

[0049] As shown in Figure 5, the cartridge 14 has a case 141 and an ion exchange resin 143 housed within the case 141. By removing calcium ions and magnesium ions with the ion exchange resin 143, the hardness of the water can be reduced. This suppresses the generation of white powder (white dust).

[0050] Here, an example is disclosed in which the cartridge 14 has an ion exchange resin 143, but it may also have other means for purifying water (e.g., activated carbon). By providing the cartridge 14, it is possible to improve water quality, suppress white powder formation, and extend the lifespan of each element such as the heating unit 31 and the atomizing unit 33.

[0051] The case 141 is formed in an annular shape. A duct 23 is passed through a through hole in the center of the case 141. As shown in Figures 5 and 6, the case 141 has an upper portion 1411 and a lower portion 1413. The upper portion 1411 has an inlet 141A through which the water supply port 115A of the tank body 11 passes, and the lower portion 1413 has an outlet 141B.

[0052] The cartridge 14 further includes a water supply valve 145 located at the outlet 141B. The outlet 141B is configured to be openable and closable by the water supply valve 145 and the solenoid valve 32. In the example in Figure 6, the water supply valve 145 has a shaft portion 1451 on which the solenoid valve 32 acts. The shaft portion 1451 has a spring located on its outer circumference.

[0053] In one example, when the solenoid valve 32 is in standby mode, the shaft portion 1451 is pulled downward D by the spring, causing the water supply valve 145 to lower and the outlet 141B to close. In contrast, when the solenoid valve 32 is energized, the shaft portion 1451 is pushed upward U by the solenoid valve 32, causing the water supply valve 145 to rise and the outlet 141B to open.

[0054] The cartridge 14 further includes a magnet 147 and claw portions 149A and 149B located on its lower surface portion 1413. The magnet 147, along with a magnetic sensor described later, is used to determine whether the tank portion 100, including the cartridge 14, is attached to the main body portion 200.

[0055] The claw portions 149A and 149B are for fixing the cartridge 14 to the cartridge mounting portion 117. The claw portions 149A and 149B are provided on the lower surface portion 1413 so as to be movable in the radial direction about the axis CX. The cartridge mounting portion 117 has an opening 1171 (shown in Figure 4) into which one end of the claw portions 149A and 149B catches. In the examples in Figures 5 and 6, there are two claw portions 149A and 149B, but there may be one or three or more. Note that the method of fixing the cartridge 14 to the cartridge mounting portion 117 is not limited to the examples described above.

[0056] As shown in Figure 7, the nozzle 13 is positioned at the other end 113b of the inner circumference 113. The nozzle 13 has a cylindrical nozzle body 131 and a baffle plate 133.

[0057] The nozzle body 131 has an opening 131A that overlaps with the outlet 100A (shown in Figure 1). The baffle plate 133 is positioned to obstruct the upward movement of the mist. Specifically, the baffle plate 133 is located inside the inner circumference 113 by a plurality of support parts 1311 that extend downward D from the nozzle body 131.

[0058] The baffle plate 133 is provided, for example, along the horizontal direction, but is not limited to this example. The outer diameter of the baffle plate 133 is smaller than the inner diameter of the other end 113b of the inner circumference 113. In other words, multiple gaps G1 are formed between the baffle plate 133 and the inner circumference 113. When the mist passes through the gaps G1, it is discharged to the outside from the outlet 100A (shown in Figure 1) via the nozzle body 131.

[0059] Figures 8 to 10 are schematic perspective views of the main body 200 shown in Figure 3. Figure 11 is a schematic perspective view of the duct 23 and reflector 24 shown in Figure 8. Figure 12 is a schematic cross-sectional view of the duct 23 and reflector 24. Figure 13 is a schematic perspective view of the reflector 24. Figures 9 and 10 show the main body 200 shown in Figure 8 with the duct 23 and reflector 24 omitted. Also, Figure 10 shows the main body 200 viewed from a different direction than Figure 9.

[0060] As described above, the main body 200 includes a storage section 22, a heating section 31, and an atomizing section 33. In this embodiment, the heating section 31 and a portion of the atomizing section 33 are arranged to be exposed within the storage section 22.

[0061] The storage section 22 is formed of, for example, a resin material, but may include a portion made of a metal material. The storage section 22 has a wall section 221 and a bottom section 223. The wall section 221 and the bottom section 223 are formed, for example, as a single unit.

[0062] The wall portion 221 is formed in a cylindrical shape extending upward U from the bottom portion 223. The axis CX coincides with the centerline of the storage portion 22. One end of the wall portion 221 is closed by the bottom portion 223, and the other end is open.

[0063] The bottom portion 223 has openings 2231, 2232 and opening 2233. The PTC heaters 311, 313 of the heating section 31 have heating surfaces 311A, 313A. The heating surfaces 311A, 313A are positioned in openings 2231, 2232. Specifically, the heating surfaces 311A, 313A are exposed from openings 2231, 2232. By positioning the heating surfaces 311A, 313A in the bottom portion 223, convection is easily generated in the water of the storage section 22, and the water can be heated with less temperature unevenness.

[0064] The atomizing unit 33 has an ultrasonic transducer 331. The ultrasonic transducer 331 of the atomizing unit 33 is positioned in the opening 2233. Specifically, the ultrasonic transducer 331 is exposed from the opening 2233.

[0065] In other words, the heating section 31 and the atomizing section 33 are located at the bottom 223 of the storage section 22. Specifically, the heating section 31 is located at the bottom 223, surrounding the atomizing section 33. In a plan view, the openings 2231 and 2232 have a rectangular shape, while the opening 2233 has a circular shape.

[0066] In a plan view, opening 2233 is located in the center of the storage section 22. Openings 2231 and 2232 are located outside opening 2233 with respect to the axis CX. Opening 2232 is located on the opposite side of opening 2231 from opening 2233. In other words, the heating surfaces 311A, 313A and the ultrasonic transducer 331 are arranged on the same plane. Also, the heating surfaces 311A ​​and 313A are arranged on either side of the atomizing section 33. The number of openings 2231 and 2232 is changed according to the number of heating surfaces.

[0067] The bottom portion 223 has a recess 2235, as shown in Figure 9. The planar shape of the recess 2235 is approximately circular. The recess 2235 is recessed downwards in direction D. The recess 2235 is formed between openings 2231 and 2232, surrounding opening 2233. The duct 23 shown in Figure 8 is placed in the recess 2235.

[0068] The storage section 22 further has a stepped section 225 formed above the bottom section 223. The cartridge 14 (shown in Figure 3) is placed on top of the stepped section 225. The stepped section 225 has a protruding section 2251 that projects upward in the U direction. The protruding section 2251 has an outlet 2253, as shown in Figure 10. Air supplied from the blower section 34 is blown out from the outlet 2253. The outlet 2253 is formed on the side of the protruding section 2251. Specifically, the outlet 2253 faces the center of the storage section 22.

[0069] Furthermore, a magnetic sensor 148 (shown in Figure 8) is positioned on the stepped portion 225 at a location corresponding to the magnet 147 of the cartridge 14. Based on the detection signal from the magnetic sensor 148, the control unit 50 can determine whether the tank portion 100, including the cartridge 14, is installed.

[0070] Furthermore, the storage section 22 has a stepped section 227 located on the opposite side of the stepped section 225. The height of the stepped section 227 is smaller than the height of the stepped section 225. An action part 321 is located on the stepped section 227, which acts on the water supply valve 145 in conjunction with the movement of the solenoid valve 32. When the solenoid valve 32 is energized, the action part 321, in conjunction with the operation of the solenoid valve 32, pushes the shaft section 1451 upward U, thereby opening the outlet 141B. The water temperature sensing unit 43 is located, for example, on the outside and below the stepped section 227, but is not limited to this example.

[0071] As shown in Figure 8, the duct 23 is located in the center of the storage section 22. Specifically, the duct 23 is located around the atomizing section 33. More specifically, the duct 23 is located between the heating section 31 and the atomizing section 33, surrounding the atomizing section 33. In other words, the duct 23 divides the storage section 22 into the space where the atomizing section 33 is located and the space outside the atomizing section 33. The space where the atomizing section 33 is located corresponds to the space inside the duct 23. The outer space corresponds to the space between the wall 221 of the storage section 22 and the duct 23. The heating section 31 is located outside the duct 23 at the bottom 223.

[0072] As shown in Figures 11 and 12, the duct 23 is formed in a cylindrical shape extending along axis CX. The duct 23 has, for example, a substantially cylindrical shape, but may also have a polygonal shape. Axis CX coincides with the centerlines of the duct 23 and the reflector 24. The duct 23 has a lower end 23a that contacts the bottom 223. The lower end 23a includes the lower end and the area near it. The lower end 23a is positioned in the recess 2235. Specifically, the lower end 23a contacts the recess 2235.

[0073] The lower end portion 23a has a plurality (for example, two) of openings 231. The inside and outside of the duct 23 are in communication through the openings 231. The openings 231 are located, for example, between the heating section 31 and the atomizing section 33. Water heated by the heating section 31 is supplied to the atomizing section 33 through the openings 231.

[0074] The opening 231 is, for example, a notch formed in the lower end portion 23a, but it may also be a through hole formed in the lower end portion 23a. The opening 231 formed in the lower end portion 23a may be one or three or more. Furthermore, the shape of the opening 231 is not limited to a rectangular shape, but may be a triangular shape, a roughly U-shape, a circular shape, or other shapes. In this embodiment, the opening 231 corresponds to an example of a structure for supplying water heated by the heating portion 31 to the atomizing portion 33. This structure is not limited to an opening 231. In one example, the structure may be formed in a mesh shape by a plurality of through holes. In another example, the structure may be formed in a flow channel shape extending in the radial direction.

[0075] The duct 23 is positioned such that a portion of it covers the protrusion 2251. In other words, the protrusion 2251 is located inside the duct 23. That is, the outlet 2253 is connected to the inside of the duct 23.

[0076] The duct 23 includes a cover portion 233 that covers the protruding portion 2251 and a notch 235 that extends downward D from the cover portion 233. The notch 235 is formed along the side wall of the stepped portion 225. Since the air blown out from the outlet 2253 flows inside the duct 23, very little of this air flows outside the duct 23.

[0077] In the illustrated example, the duct 23 has an inner cylinder 235 located inside. The inner cylinder 235 extends downward D from the upper end of the duct 23. Multiple oval-shaped openings 2351 are formed in the inner cylinder 235.

[0078] As shown in Figure 13, the reflector 24 has a cylindrical portion 241 positioned at the upper end of the duct 23 and a plurality of guide portions 243 (for example, four) connected to the upper end of the cylindrical portion 241.

[0079] The cylindrical portion 241 is divided into multiple sections by partitions 2411 (shown in Figure 12) to match the number of guide portions 243. The multiple guide portions 243 are arranged in the circumferential direction θ centered on the axis CX. In this embodiment, the reflector 24 is formed in a four-lobe shape.

[0080] The guide section 243 has an outer wall section 2431 connected to the cylindrical section 241 and an inner wall section 2433 connected to one end of the outer wall section 2431. The outer wall section 2431 and the inner wall section 2433 have, for example, a roughly triangular shape. The outer wall section 2431 is inclined to approach the axis CX as it moves upward U.

[0081] The guide section 243 has a discharge port 243A. The discharge port 243A is formed between the outer wall section 2431 and the inner wall section 2433. The discharge port 243A has, for example, a roughly triangular shape.

[0082] The discharge port 243A opens in the circumferential direction θ. More specifically, the discharge port 243A opens diagonally upward in the circumferential direction θ. The discharge port 243A faces the inner wall portion 2433 of the adjacent guide portion 243 in the circumferential direction.

[0083] The guide portion 243 only needs to have the discharge port 243A as described above, and the shape of the guide portion 243 is not limited to the example described above. For example, the discharge port 243A of the guide portion 243 may be circular or polygonal.

[0084] As the mist rises, it collides with the guide portion 243 of the reflector 24. The mist is guided (alongside) the inner surfaces of the outer wall portion 2431 and the inner wall portion 2433 of the guide portion 243 and discharged from the discharge port 243A. At this time, the mist flows in the circumferential direction. As a result, the mist flow, which was flowing upward U, is changed by the reflector 24 to flow diagonally upward. Consequently, a swirling flow is formed by the mist around the axis CX.

[0085] Next, we will explain an example of the operation of humidifier 1000.

[0086] Figure 14 is a schematic cross-sectional view along the line XIV-XIV in Figure 1. Figure 15 is a schematic cross-sectional view along the line XV-XV in Figure 1. Figure 16 is a schematic perspective cross-sectional view along the line XVI-XVI in Figure 1. Figure 17 is a diagram illustrating the flow of mist. Figure 14 shows a cross-section of the cartridge 14 including the water supply valve 145, Figure 15 shows a cross-section including the heating section 31, and Figure 16 shows a cross-section including the air blowing section 34.

[0087] The water stored in the tank body 11 flows from the water inlet 115A (shown in Figure 4) of the tank body 11 to the cartridge 14. The hardness of the water that flows into the cartridge 14 is reduced by the ion exchange resin 143 of the cartridge 14.

[0088] A portion of the water supply valve 145 of the cartridge 14 (shaft portion 1451) is located in the storage portion 22, as shown in Figure 14. The solenoid valve 32 is located below the stepped portion 227. The solenoid valve 32, the operating portion 321, and the shaft portion 1451 are arranged in this order in an upward U direction.

[0089] When the water level in the storage section 22 drops and the control unit 50 energizes the solenoid valve 32, the shaft section 1451 is pushed upward U by the solenoid valve 32 and the operating section 321, as shown by arrow A1 in Figure 14, and the outlet 141B of the cartridge 14 opens. As a result, the water stored in the tank section 100 flows to the storage section 22 via the cartridge 14. The water level detection unit 41 is arranged, for example, along the side wall of the stepped section 225 of the storage section 22, but is not limited to this example.

[0090] In the storage section 22, water (not shown) is stored both inside and outside the duct 23. As shown in Figure 15, on the outside of the duct 23, the water is heated by direct contact with the heating surfaces 311A ​​and 313A.

[0091] The outside and inside of the duct 23 are connected by an opening 231 at the lower end 23a of the duct 23. This makes it difficult for a difference in water temperature to occur between the inside and outside of the duct 23 during the heating process described later. In other words, in this embodiment, the water temperature difference throughout the storage section 22 is kept from becoming large.

[0092] The water in the storage section 22 flows through the opening 231 and into the duct 23, as indicated by arrow A2 in Figure 15. Inside the duct 23, the piezoelectric element of the ultrasonic transducer 331 is driven at a high frequency, causing the diaphragm to vibrate and forming a water column PL as shown in Figure 15. Then, cavitation generated in the water column PL generates mist (shown as mist MI in Figure 16) from the water column PL. Because the atomizing section 33 is surrounded by the duct, vibrational energy tends to concentrate in the water column PL, making it easier to form a mist containing many small particles.

[0093] The blower unit 34 is adjacent to the storage unit 22. In the main body 200, as shown in Figure 16, the fan cover 343 of the blower unit 34 forms a flow path F1 from the fan 341 to the outlet 2253. Specifically, the flow path F1 is formed between the storage unit 22 and the fan cover 343, along the stepped portion 225 of the storage unit 22. As indicated by arrow A3 in Figure 16, the blower unit 34 sends air drawn in from the intake port 200A to the inside of the duct 23 via the flow path F1 and the outlet 2253.

[0094] Flow paths F2 and F3 are formed inside the duct 23 and inside the inner circumference 113 of the tank body 11, respectively. In this embodiment, flow path F2 corresponds to the first flow path, and flow path F3 corresponds to the second flow path. Flow paths F2 and F3 extend upward U along the axis CX. Flow path F2 is connected to flow path F1 and the outlet 2253. Flow path F3 is connected to flow path F2.

[0095] The flow paths F2 and F3 form a flow path F10 located in the central part of the humidifier 1000. The reflector 24 is located upstream of flow path F3, and the nozzle 13 (shown in Figure 3) is located downstream of flow path F3.

[0096] Inside the duct 23 (flow path F2), when the air blown out from the outlet 2253 mixes with the mist, the mist rises along with the air in flow path F3. Flow path F10 (flow paths F2, F3) is the flow path through which the mist passes.

[0097] For example, the outer surface of the inner cylinder 235 faces the outlet 2253. By positioning the inner cylinder 235 inside the duct 23, the air sent from the outlet 2253 is prevented from mixing with the mist and flowing directly toward the reflector 24.

[0098] As explained using Figure 13, the mist rising along the upward direction U in the flow path F2 passes through the reflector 24. The mist that exits from the outlet 243A of the reflector 24 forms a swirling flow CD centered on the axis CX, as shown in Figure 17, and rises up the flow path F3 while swirling.

[0099] In this process, larger particles in the mist collide with the inner surface of the inner circumference 113 due to the centrifugal force based on the swirling flow CD. In Figure 17, larger particles are shown as particles P. In this way, larger particles P are separated from the mist as they rise along the flow path F3. The separated particles are collected in the storage section 22 along the inner surface.

[0100] The mist then rises while swirling along the flow path F3 and reaches the nozzle 13. The nozzle 13 has the baffle plate 133 described above. Larger particles contained in the mist collide with the baffle plate 133. As a result, larger particles are separated from the mist. In other words, on the upstream and downstream sides of the flow path F3, larger particles are separated from the mist by the reflector 24 and the baffle plate 133.

[0101] The mist, with its large particles separated in this way, passes through the gap G1 (shown in Figure 7) between the baffle plate 133 and the inner circumference 113 and is released to the outside from the outlet 100A. In other words, the humidifier 1000 releases mist that does not contain many large particles. As a result, in this embodiment, it is possible to ensure a sufficient amount of mist is released while releasing mist containing many small particles.

[0102] Although this explanation assumes that the heating unit 31 is in operation, the flow of water, mist, and air in the humidifier 1000 is the same even when the heating unit 31 is stopped.

[0103] Next, the operating unit 35 will be described. Figure 18 is a schematic front view of the operating unit 35 in this embodiment.

[0104] As described above, the humidifier 1000 is equipped with an operation unit 35. The operation unit 35 is, for example, a capacitive touch panel, but is not limited to this example. The operation unit 35 is located, for example, on the front of the main unit 200 (shown by a dashed line in Figure 1). The user can operate the operation unit 35 via the housing unit 21.

[0105] The control unit 35 has several buttons that can be operated by the user's fingertips. In the example shown in Figure 18, the control unit 35 has a power button 351, a mode button 352, a humidification button 353, a timer button 354, and an illumination button 355. The control unit 35 further has indicators (indicator lamps) 356, 357, 358, and 359 located above these buttons. The control unit 35 may further have other buttons or at least one of the indicators.

[0106] When the power button 351 is operated by the user, the control unit 50 starts the humidification operation. When the power button 351 is operated, the indicator 356 above the power button 351 lights up, allowing the user to visually confirm that humidification is in progress. The indicator 356 also includes an indicator for heating operation.

[0107] Therefore, the user can visually confirm that humidification and heating operations are in progress. When the power button 351 is pressed again, the control unit 50 stops the atomizing unit 33, the blower unit 34, etc., and stops the humidification operation.

[0108] When the user operates the mode button 352, the control unit 50 cycles through the modes in the order of auto mode, night mode, and rapid mode with each operation. The indicator 357 has an indicator corresponding to each mode. Each time the mode is switched, the indicator corresponding to the selected mode lights up, allowing the user to visually confirm the selected mode. For example, when the power button 351 is first operated, the control unit 50 starts humidification operation in auto mode.

[0109] When auto mode is selected, the control unit 50 acquires the ambient humidity around the humidifier 1000 from the temperature and humidity sensing unit 42 at predetermined intervals and automatically switches the operating level based on the acquired humidity value. The operating levels include, for example, lowest setting, low setting, medium setting, and high setting.

[0110] In one example, the control unit 50 sets the lowest power setting to 50 mL / h when the humidity is 60% or higher, the target atomization rate per unit time to 100 mL / h when the humidity is 50% or higher but less than 60%, the target atomization rate per unit time to 150 mL / h when the humidity is 30% or higher but less than 50%, and the target atomization rate per unit time to 300 mL / h when the humidity is less than 30%.

[0111] Here, the target value for atomization amount corresponds to the volume of water atomized per unit time by the atomizing unit 33. In this way, when auto mode is selected, the control unit 50 periodically acquires the humidity around the humidifier 1000 and maintains a comfortable humidity environment by adjusting the atomization amount in stages. Note that the criteria for switching the operating level in auto mode and the target value for atomization amount at each operating level are merely examples and are not limited to these examples.

[0112] When night mode is selected, the control unit 50 acquires the ambient humidity around the humidifier 1000 from the temperature and humidity detection unit 42 at predetermined intervals, and switches the humidification operation on and off based on the acquired humidity value. When night mode is selected, the control unit 50 stops the light emission from the light emission unit 36.

[0113] In one example, the control unit 50 stops humidification when the humidity is 60% or higher and starts humidification when the humidity is less than 50%. In night mode, if the humidity is less than 50%, the control unit 50 selects low-power operation in auto mode. Note that the criteria for switching between starting and stopping humidification in night mode are merely examples and are not limited to this example.

[0114] When rapid mode is selected, the control unit 50 starts humidification operation at a preset target value for atomization per unit time (for example, 500 mL / h). In rapid mode, the user can quickly humidify the space regardless of the ambient humidity around the humidifier 1000. For example, after a certain period of time (for example, 30 minutes) has elapsed since the start of rapid mode, the control unit 50 switches from rapid mode to auto mode.

[0115] When the humidification button 353 is operated by the user, the control unit 50 switches the humidification level for each operation. For example, the control unit 50 cycles through intermittent humidification, weak humidification, and strong humidification for each operation.

[0116] Indicator 358 has indicators corresponding to each humidification level. Each time the humidification level is switched, the indicator corresponding to the selected humidification level lights up, allowing the user to visually confirm the selected humidification level.

[0117] In one example, the control unit 50 sets the target atomization rate per unit time to 50 mL / h when intermittent humidification is selected, sets the target atomization rate per unit time to 150 mL / h when weak humidification is selected, and sets the target atomization rate per unit time to 350 mL / h when strong humidification is selected.

[0118] When the humidification button 353 is operated, the control unit 50 operates the atomizing unit 33 to achieve a target atomization amount corresponding to the humidification level, regardless of the humidity surrounding the humidifier 1000. The user can set a target atomization amount regardless of the humidity surrounding the humidifier 1000 by operating the humidification button 353.

[0119] Thus, the control unit 50 has multiple modes of humidification operation that can be switched by the operation unit 35 (auto mode, night mode, rapid mode, and manual mode operated by the humidification button 353). The target value of atomization in rapid mode is set to be greater than, for example, the target value of atomization in strong operation and strong humidification as described above. The control unit 50 may also switch the amount of air sent from the air blower 34 (airflow rate) based on the target value of atomization in each of the modes described above.

[0120] When the user operates the timer button 354, the control unit 50 switches the time until the humidification operation of the humidifier 1000 stops (hereinafter referred to as "operation stop time") for each operation. For example, the control unit 50 cycles through the operation stop time in the order of 1 hour, 4 hours, 8 hours, and timer off for each operation. When the operation stop time is set, the control unit 50 starts counting down the remaining time, and when the remaining time reaches zero, it stops the atomizing unit 33, the blower unit 34, etc., and stops the humidification operation. Note that timer off refers to a state where the remaining time until the humidification operation stops is not being counted.

[0121] The indicator 359 has indicators corresponding to each operating stop time. Each time the operating stop time is switched, the indicator corresponding to the selected operating stop time lights up, allowing the user to visually confirm the selected operating stop time.

[0122] When the user operates the illuminance button 355, the control unit 50 switches the illuminance level for each operation. For example, the control unit 50 cycles through the illuminance levels in the order of high illuminance, medium illuminance, low illuminance, and off for each operation. The control unit 50 controls the brightness of the indicators 356, 357, 358, 359 and the light-emitting unit 36 ​​according to the selected illuminance level.

[0123] Next, we will explain an example of water level monitoring in the storage section 22. The control unit 50 determines the water level in the storage unit 22 based on the output signal from the water level detection unit 41. In one example, the control unit 50 determines the first water level, second water level, third water level, and fourth water level in ascending order.

[0124] When the control unit 50 determines that the water level in the storage unit 22 has fallen below the first water level, it stops the heating operation. This state corresponds to a water shortage in the storage unit 22. When the control unit 50 determines that the water level in the storage unit 22 has fallen below the second water level, it energizes the solenoid valve 32, opens the outlet 141B with the water supply valve 145, and supplies water from the tank unit 100 to the storage unit 22. When the control unit 50 determines that water has been supplied from the storage unit 22 and the water level in the storage unit 22 has risen above the third water level, it puts the solenoid valve 32 into standby mode, closes the outlet 141B with the water supply valve 145, and stops the supply of water from the tank unit 100.

[0125] The control unit 50 stops the heating operation when it determines that the water level in the storage unit 22 has exceeded the fourth water level. This state corresponds to the storage unit 22 being full. Note that the water level monitoring by the control unit 50 is not limited to the example described above. The control unit 50 may determine the water level in more stages than the example described above. For example, the opening 231 of the duct 23 described using Figure 11 is positioned so that at least a part of the opening 231 is submerged in water at the second water level.

[0126] Next, the heating process in the control unit 50 will be described. Figures 19A to 20B are flowcharts showing an example of the heating process in this embodiment. The processes in the flowcharts of Figures 19A to 20B are realized by the CPU of the control unit 50 reading and executing a program stored in the program memory.

[0127] First, the heating process during humidification operation will be explained using Figures 19A and 19B.

[0128] When power is supplied to the humidifier 1000 from the power cord 371 (shown in Figure 2), it enters a standby state for humidification. Then, when the power button 351 is operated by the user, the control unit 50 starts the humidification operation (step ST11 in Figure 19A).

[0129] Next, the control unit 50 determines whether a predetermined time has elapsed since power was supplied (step ST12 in Figure 19A). In one example, the control unit 50 measures the elapsed time from the moment power was supplied. In one example, this moment is when the plug (not shown) of the power cord 371 is inserted into the outlet. The predetermined time in step ST12 is, for example, 30 minutes, but is not limited to this example.

[0130] If it is determined that time has not elapsed (step ST12 NO in Figure 19A), the control unit 50 repeats this determination until a predetermined time has elapsed. If it is determined that time has elapsed (step ST12 YES in Figure 19A), the control unit 50 determines whether the rapid mode is selected (step ST13 in Figure 19A).

[0131] If the control unit 50 determines that the rapid mode is selected (step ST13 YES in Figure 19A), it repeats this determination until the rapid mode ends. If the control unit 50 determines that the rapid mode is not selected (step ST13 NO in Figure 19A), it starts the operation of the heating unit 31 (heating operation) (step ST14 in Figure 19A). This starts the heating process.

[0132] Next, the control unit 50 determines whether the storage unit 22 is empty (step ST15 in Figure 19A). In one example, the control unit 50 determines whether the water level in the storage unit 22 is below the second water level.

[0133] If the control unit 50 determines that the storage unit 22 is depleted of water (the water level in the storage unit 22 is below the second water level) (step ST15 YES in Figure 19A), the control unit 50 stops the heating and humidifying operations (step ST151 in Figure 19A). The control unit 50 then repeats this determination until it determines that the storage unit 22 is not depleted of water (step ST152 in Figure 19A).

[0134] If the control unit 50 determines that the water level in the storage section 22 is below the second water level, as described above, it energizes the solenoid valve 32, opens the outlet 141B with the water supply valve 145, and supplies water from the tank section 100 to the storage section 22.

[0135] Then, if the control unit 50 determines that the storage unit 22 is not empty (the water level in the storage unit 22 is at or above the second water level) (step ST152 NO in Figure 19A), it restarts the heating operation and humidification operation (step ST153 in Figure 19A).

[0136] If the storage unit 22 is determined not to be depleted of water (step ST15 NO in Figure 19A), or after step ST153, the control unit 50 determines whether there is an abnormality (step ST16 in Figure 19A). An abnormality here means that there is an abnormality in at least one of the following: the water level and water temperature of the storage unit 22, the heating unit 31, the atomizing unit 33, and the blowing unit 34.

[0137] For example, an abnormality in the water level of the storage unit 22 means that the water level in the storage unit 22 is below the first water level or above the fourth water level. An abnormality in the water temperature of the storage unit 22 means, for example, that the water temperature is above a predetermined temperature. An abnormality in the heating unit 31 means, for example, that it is overheated. An abnormality in the atomizing unit 33 means, for example, that an abnormal signal has been detected from the atomizing unit 33. The atomizing unit 33 is configured to output an abnormal signal if it operates when the water runs out, for example. An abnormality in the blowing unit 34 means, for example, that the rotation speed of the fan 341 does not meet a predetermined rotation speed. In this case, the control unit 50 may notify the user of the abnormality by lighting an indicator, sounding a warning, etc.

[0138] If the control unit 50 determines that there is an abnormality (step ST16 YES in Figure 19A), it stops the heating and humidifying operations (step ST161 in Figure 19A). The control unit 50 then repeats this determination until it determines that there is no abnormality (step ST162 in Figure 19A). If the control unit 50 determines that there is no abnormality (step ST162 NO in Figure 19A), it restarts the heating and humidifying operations (step ST163 in Figure 19A).

[0139] If no abnormality is detected (step ST16 NO in Figure 19A), or after step ST163, the control unit 50 determines whether it is necessary to limit the target value of the atomization amount (step ST17 in Figure 19A). Specifically, the control unit 50 determines whether the target value of the atomization amount for the currently running mode exceeds the target value of the atomization amount suitable for heating operation. For example, assume that the upper limit of the target value of the atomization amount suitable for heating operation is 150 mL / h. In this case, if the above-mentioned "high power operation" or "high humidification" is selected, the control unit 50 determines that it is necessary to limit the target value of the atomization amount. Note that the rapid mode is not included in this mode. Note that the target value of the atomization amount suitable for heating operation is changed as appropriate depending on the performance of the heating unit 31 and the atomizing unit 33.

[0140] If it is determined that it is necessary to limit the target value of the atomization amount (step ST17 YES in Figure 19A), the control unit 50 limits the atomization amount to the upper limit of the target value of the atomization amount suitable for heating operation (step ST171 in Figure 19A). In one example, the control unit 50 limits the target value of the atomization amount for "strong operation (target value of atomization amount: 300 mL / h)" or "strong humidification (target value of atomization amount: 350 mL / h)" to 150 mL / h, respectively. This allows the control unit 50 to perform heating operation while performing humidification operation. In other words, the control unit 50 is configured to prioritize heating operation over humidification operation. The control unit 50 may also limit the atomization amount to a value less than the upper limit of the target value of the atomization amount suitable for heating operation.

[0141] If it is determined that there is no need to limit the target value of the atomization amount (step ST17 NO in Figure 19A), or after step ST171, the control unit 50 determines whether the rapid mode is selected (step ST18 in Figure 19B).

[0142] If the control unit 50 determines that the rapid mode is selected (step ST18 YES in Figure 19B), it stops the heating operation (step ST181 in Figure 19B). After stopping the heating operation, the control unit 50 repeats this determination until the rapid mode ends (step ST182 in Figure 19B). Then, if the control unit 50 determines that the rapid mode is not selected (step ST182 NO in Figure 19B), it restarts the heating operation (step ST183 in Figure 19B).

[0143] If it is determined that rapid mode is not selected (step ST18 NO in Figure 19B), or after step ST183, the control unit 50 determines whether the water temperature in the storage unit 22 is above the upper limit temperature (step ST19 in Figure 19B). If it is determined that the water temperature is above the upper limit temperature (step ST19 YES in Figure 19B), the control unit 50 stops the heating operation (step ST191 in Figure 19B). The upper limit temperature is, for example, 75 degrees, but is not limited to this example. The upper limit temperature is set, for example, in the range of 75 to 90 degrees. By setting the upper limit temperature to less than 90 degrees, boiling of the water in the storage unit 22 is suppressed.

[0144] If the control unit 50 determines that the water temperature is not above the upper limit temperature (step ST19 NO in Figure 19B), or after step ST191, it determines whether the water temperature in the storage unit 22 is below the lower limit temperature (step ST20 in Figure 19B). If the control unit 50 determines that the water temperature is below the lower limit temperature (step ST20 YES in Figure 19B), it controls the system to start the heating operation (step ST201 in Figure 19B). For example, if the heating operation is stopped, the control unit 50 restarts the heating operation. The lower limit temperature is, for example, 68 degrees Celsius, but is not limited to this example.

[0145] If the control unit 50 determines that the water temperature is not below the lower limit temperature (step ST20 NO in Figure 19B), or after step ST201, it determines whether a predetermined time has elapsed since the start of the heating process (step ST21 in Figure 19B). In one example, the control unit 50 measures the elapsed time from the time when the heating unit 31 was first started to operate in the heating process (for example, the start time of the heating process). The predetermined time in step ST21 is, for example, 2 hours, but is not limited to this example. If it determines that the time has elapsed (step ST21 YES in Figure 19B), the control unit 50 interrupts the heating process (step ST211 in Figure 19B). The control unit 50 may also notify the user that the heating process has been interrupted by lighting an indicator, sounding a warning, etc.

[0146] If it is determined that time has not elapsed (step ST21 NO in Figure 19B), the control unit 50 determines whether the time during which the water temperature in the storage unit 22 has been at or above the first temperature has exceeded the first hour since the start of the heating process (step ST22 in Figure 19B). The water temperature in the storage unit 22 is detected by the water temperature detection unit 43.

[0147] In one example, the control unit 50 determines whether 30 minutes have passed since the start of the heating process that the water temperature in the storage unit 22 has been 65 degrees or higher. 65 degrees is an example of a first temperature, but the first temperature is not limited to this temperature. 30 minutes is an example of a first hour, but the first hour is not limited to this time.

[0148] If it is determined that the first hour has not elapsed (step ST22 NO in Figure 20B), the control unit 50 repeats steps ST15 to ST22 until the first hour has elapsed. Note that the order in which steps ST15 to ST21 are executed is not limited to this example. If it is determined that the first hour has elapsed (step ST22 YES in Figure 19B), the control unit 50 completes the heating process (step ST23 in Figure 19B).

[0149] After step ST23, the control unit 50 determines whether heating operation is in progress (step ST24 in Figure 19B). If it determines that heating operation is in progress, the control unit 50 stops the heating operation (step ST241 in Figure 19B).

[0150] If it is determined that heating is not being performed (step ST24 NO in Figure 19B), or after step ST241, the control unit 50 determines whether the target value of the atomization amount is limited (step ST25 in Figure 19B). If it is determined that the atomization amount is limited (step ST25 YES in Figure 19B), the control unit 50 changes the target value of the atomization amount to the atomization amount of the selected mode (step ST251 in Figure 19B). Note that steps ST24 and ST25 in Figure 19B may be included in the heating process.

[0151] If it is determined that the target value of the atomization amount is not limited (step ST25 NO in Figure 19B), or after step ST251, the control unit 50 determines whether two hours have elapsed since the previous heating step (step ST26 in Figure 19B). In one example, the control unit 50 measures the elapsed time from the time when the heating unit 31 was first started in the previous heating step (for example, the start time of the heating step). In another example, the control unit 50 may measure the elapsed time from the time when the heating unit 31 was last stopped in the previous heating step (for example, the completion time of the heating step). The second hour is, for example, 12 hours, but is not limited to this example.

[0152] If it is determined that two hours have elapsed (step ST26 YES in Figure 19B), the control unit 50 returns to step ST14, starts the next heating step, and repeats steps ST15 to ST22. In other words, the control unit 50 starts the heating operation. If it is determined that two hours have not elapsed (step ST26 NO in Figure 19B), the control unit 50 repeats this determination until two hours have elapsed.

[0153] Next, the heating process while the humidification operation is stopped will be explained using Figures 20A and 20B. In this case, for example, the power button 351 is not operated by the user.

[0154] When power is supplied to the humidifier 1000 from the power cord 371 (shown in Figure 2), it enters a standby state for humidification. The control unit 50 then determines whether a predetermined time has elapsed since power was supplied (step ST31 in Figure 20A). The predetermined time is the same as in step ST12 in Figure 19A, but may be different.

[0155] If it is determined that time has not elapsed (step ST31 NO in Figure 20A), the control unit 50 repeats this determination until time has elapsed. If it is determined that time has elapsed (step ST31 YES in Figure 20A), the control unit 50 starts the heating operation (step ST32 in Figure 20A). This starts the heating process.

[0156] Next, the control unit 50 determines whether the storage unit 22 is depleted of water (step ST33 in Figure 20A). If it determines that the storage unit 22 is depleted of water (step ST33 YES in Figure 20A), the control unit 50 stops the heating operation (step ST331 in Figure 20A). The control unit 50 then repeats this determination until it determines that the storage unit 22 is not depleted of water (step ST332 in Figure 20A).

[0157] Then, if the control unit 50 determines that the storage unit 22 is not depleted of water (step ST332 NO in Figure 20A), it restarts the heating operation (step ST333 in Figure 20A).

[0158] If the storage unit 22 is determined not to be depleted of water (step ST33 NO in Figure 20A), or after step ST333, the control unit 50 determines whether there is an abnormality (step ST34 in Figure 20A). An abnormality here is the same as in step ST16 in Figure 19A.

[0159] If an abnormality is detected (step ST34 YES in Figure 20A), the control unit 50 stops the humidification operation (step ST341 in Figure 20A) and repeats the detection process until it determines that there is no abnormality (step ST342 in Figure 20A). Then, if the control unit 50 determines that there is no abnormality (step ST342 NO in Figure 20A), it restarts the heating operation (step ST343 in Figure 20A).

[0160] If no abnormality is detected (step ST34 NO in Figure 20A), or after step ST343, the control unit 50 determines whether the water temperature in the storage unit 22 is above the upper limit temperature (step ST35 in Figure 20B). If the control unit 50 determines that the water temperature is above the upper limit temperature (step ST35 YES in Figure 20B), the control unit 50 stops the heating operation (step ST351 in Figure 20B).

[0161] If the control unit 50 determines that the water temperature is not above the upper limit temperature (step ST35 NO in Figure 20B), or after step ST351, it determines whether the water temperature in the storage unit 22 is below the lower limit temperature (step ST36 in Figure 20B). If the control unit 50 determines that the water temperature is below the lower limit temperature (step ST36 YES in Figure 20B), it controls the unit to start the heating operation (step ST361 in Figure 20B). For example, if the heating operation is stopped, the control unit 50 restarts the heating operation.

[0162] If the control unit 50 determines that the water temperature is not below the lower limit temperature (step ST36 NO in Figure 20B), or after step ST361, it determines whether a predetermined time has elapsed since the start of the heating process (step ST37 in Figure 20B). The predetermined time is the same as in step ST21 in Figure 19B, but may be different. If it determines that the time has elapsed (step ST37 YES in Figure 20B), the control unit 50 interrupts the heating process (step ST371 in Figure 20B).

[0163] If it is determined that time has not elapsed (step ST37 NO in Figure 20B), the control unit 50 determines whether the time during which the water temperature in the storage unit 22 has been at or above the first temperature has exceeded the first hour from the start of the heating process (step ST38 in Figure 20B). Step ST37 is the same as step ST22 in Figure 19B.

[0164] If it is determined that the first hour has not elapsed (step ST38 NO in Figure 20B), the control unit 50 repeats steps ST33 through ST38 until the first hour has elapsed. Note that the order of steps ST33 through ST37 is not limited to this example. If it is determined that the first hour has elapsed (step ST38 YES in Figure 20B), the control unit 50 completes the heating process (step ST39 in Figure 20B).

[0165] After step ST39, the control unit 50 determines whether heating is in operation (step ST40 in Figure 20B). If it determines that heating is in operation, the control unit 50 stops the heating operation (step ST401 in Figure 20B). Note that step ST40 in Figure 20B may be included in the heating process.

[0166] If it is determined that no heating operation is being performed (step ST40 NO in Figure 20B), or after step ST401, the control unit 50 determines whether two hours have elapsed since the previous heating step (step ST41 in Figure 20B). Step ST41 is the same as step ST26 in Figure 19B.

[0167] If it is determined that two hours have elapsed (step ST41 YES in Figure 20B), the control unit 50 returns to step ST32, starts the next heating step, and repeats steps ST33 to ST38. If it is determined that two hours have not elapsed (step ST41 NO in Figure 20B), the control unit 50 repeats this determination until two hours have elapsed.

[0168] Figure 21 is a diagram illustrating the heating process. Figure 21 shows the heating operation of the heating unit 31 and the water temperature WT of the storage unit 22. In Figure 21, the horizontal axis represents time. Figure 21 shows heating process HST1 and the heating process that follows heating process HST1 as heating process HST2. Heating process HST1 corresponds to the heating process preceding heating process HST2.

[0169] As shown in Figure 21, when the control unit 50 starts the heating process HST1, the heating unit 31 starts operating (heating unit 31 ON), and the water temperature WT rises. When the water temperature reaches or exceeds the first temperature T1, the control unit 50 starts measuring the time AT during which the water temperature WT remains above the first temperature T1.

[0170] Time AT is the cumulative elapsed time during which, for example, the water temperature WT is equal to or greater than the first temperature T1. Therefore, from the start of the heating process until its completion, even if the water temperature WT falls below the first temperature T1, measurement continues from the previous time AT once it rises above the first temperature T1 again.

[0171] Then, the control unit 50 stops the heating operation when the water temperature WT is above temperature T2 (step ST191 in Figure 19B, step ST351 in Figure 20B). Temperature T2 corresponds to the upper limit temperature mentioned above. Since temperature T2 is above the first temperature T1, the control unit 50 continues to measure time AT. When the water temperature WT decreases and the control unit 50 finds that the water temperature WT is below temperature T3, it restarts the heating operation (step ST201 in Figure 19B, step ST361 in Figure 20B). Temperature T3 corresponds to the lower limit temperature mentioned above.

[0172] In this manner, during the heating process, the control unit 50 repeatedly operates and stops the heating unit 31, measuring the time AT during which the water temperature WT is equal to or greater than the first temperature T1, and determines whether the first time has elapsed (step ST22 in Figure 19B, step ST38 in Figure 20B). If it determines that the first time has elapsed, the control unit 50 completes the heating process HST1 (step ST23 in Figure 19B, step ST39 in Figure 20B).

[0173] Temperature and time control are crucial in water sterilization; therefore, by controlling the heating temperature and heating time as described above, water sterilization is reliably performed. The first temperature is a temperature suitable for water sterilization, and the first time is a time suitable for water sterilization at the first temperature. Furthermore, if it is determined that it is necessary to limit the target value of the atomization amount (step ST17 YES in Figure 19A), the control unit 50 is configured to limit the atomization amount to the upper limit of the target value of the atomization amount suitable for heating operation (step ST171 in Figure 19A). This ensures that even when humidification operation is being performed, the water temperature in the storage unit 22 can be reliably raised to a temperature suitable for water sterilization (specifically, the first temperature).

[0174] In this embodiment, the lower limit temperature is set to be at or above the first temperature. This makes it less likely for the water temperature to fall below the first temperature during the heating process, ensuring that the water is properly sterilized. For example, by heating the water in the storage section 22 so that it remains at 65 degrees Celsius or higher for 30 minutes or more, the water can be properly sterilized.

[0175] Furthermore, in order to start the next heating process HST2, the control unit 50 measures the time IN that has elapsed since the start of the heating process HST1. When the control unit 50 determines that time IN has elapsed to the second hour, it executes the next heating process HST2 (process ST26 in Figure 19B, process ST41 in Figure 20B). If the second hour is 12 hours, the heating process is executed twice per day. Note that the number of heating processes executed per day can be appropriately changed by adjusting the second hour.

[0176] In this embodiment, when the power button 351 is operated by the user during humidification operation and the humidification operation stops, the control unit 50 switches control from the flowchart in Figures 19A and 19B to the flowchart in Figures 20A and 20B. Furthermore, when the humidification operation is stopped, when the power button 351 is operated by the user and the humidification operation starts, the control unit 50 switches control from the flowchart in Figures 20A and 20B to the flowchart in Figures 19A and 19B. In this way, the control unit 50 is configured to execute the heating process regardless of whether humidification operation is in progress or not. For example, the control unit 50 determines whether the power button 351 has been operated at any timing in the flowchart shown in Figures 19A to 20B.

[0177] For example, if the power button 351 is operated while steps ST12 to ST13 in Figure 19A are being executed, the control unit 50 switches control to step ST31 in Figure 20A. If the power button 351 is operated while step ST31 in Figure 20A is being executed, the control unit 50 switches control to steps ST12 to ST13 in Figure 19A.

[0178] Furthermore, if the power button 351 is operated while the process from step ST15 in Figure 19A to step ST22 in Figure 19B is being executed, the control unit 50 switches control from step ST33 in Figure 20A to step ST38 in Figure 20B. If the power button 351 is operated while the process from step ST33 in Figure 20A to step ST38 in Figure 20B is being executed, the control unit 50 switches control from step ST15 in Figure 19A to step ST22 in Figure 19B.

[0179] Furthermore, if the power button 351 is operated while process ST26 in Figure 19B is being executed, the control unit 50 switches control to process ST41 in Figure 20B. If the power button 351 is operated while process ST41 in Figure 20B is being executed, the control unit 50 switches control to process ST26 in Figure 19B.

[0180] Even when the control is switched as described above, the control unit 50 continues to measure time AT and time IN in Figure 21. By continuously measuring time AT, the heating process is not interrupted or shortened in this embodiment. This ensures that the temperature and time (specifically, the first temperature and first time) necessary for water sterilization are secured. Furthermore, by continuously measuring time IN, the number of heating processes performed per day is ensured. In other words, as long as power is supplied to the humidifier 1000, the growth of bacteria in the water stored in the storage unit 22 is suppressed.

[0181] With the humidifier 1000 configured as described above, a superior humidifier can be provided.

[0182] Specifically, the humidifier 1000 includes a duct 23 arranged around the atomizing section 33 in the storage section 22. The duct 23 has a lower end portion 23a that contacts the bottom 223 of the storage section 22. Thus, the storage section 22 is partitioned by the duct 23.

[0183] A heating unit 31 is located on the outside of the duct 23, and an atomizing unit 33 is located on the inside. The duct 23 has an opening 231 that connects the inside and outside of the duct 23. This allows the water from the storage unit 22 to flow from the outside of the duct 23 towards the atomizing unit 33 through the opening 231.

[0184] For example, in a humidifier relating to a comparative example, if a reservoir for heating water with a heater and a reservoir for generating mist with an ultrasonic transducer are formed separately and connected by a flow path, the temperature difference between the water in these reservoirs tends to be large. In other words, the temperature difference between the heater and the water stored in the reservoir tends to be large. Such a temperature difference is undesirable from the standpoint of water sterilization. Specifically, if the temperature difference becomes large (for example, if the temperature difference between the heater and the water stored in the reservoir is 50 degrees or more), the sterilizing effect of heating the water weakens, and bacteria tend to proliferate.

[0185] In contrast, in this embodiment, since the outside and inside of the duct 23 are connected by the opening 231 of the duct 23, the heating unit 31 can heat the water in the storage unit 22 evenly. As a result, a difference in water temperature is less likely to occur between the inside and outside of the duct 23 during the heating process. In other words, the temperature difference between the heating unit 31 and the water stored in the storage unit 22 is less likely to become large. In one example, the temperature difference between the heating unit 31 and the water stored in the storage unit 22 can be kept to 20 degrees or less. From the viewpoint of water sterilization, a temperature difference of 20 degrees or less between the heating unit 31 and the water stored in the storage unit 22 is preferable.

[0186] In other words, in this embodiment, the sterilizing effect of water due to heating is less likely to weaken, and the growth of bacteria can be suppressed more effectively than in the comparative example. By suppressing the growth of bacteria in the storage section 22, bacteria are less likely to be scattered into the room along with the mist, reducing the risk of contaminating the indoor environment. As a result, this embodiment can improve hygiene issues.

[0187] Furthermore, in this embodiment, the heating unit 31 and the atomizing unit 33 are arranged in the storage unit 22. This allows the storage unit 22, the heating surfaces 311A ​​and 313A of the heating unit 31, and the ultrasonic transducer 331 of the atomizing unit 33 to be cleaned simultaneously by removing the duct 23. Compared to the case where the storage unit is located separately as described above, this embodiment improves maintainability.

[0188] Furthermore, as explained with reference to Figures 20A and 20B in this embodiment, the control unit 50 is configured to perform the heating process even in a standby state when the humidification operation is stopped. Therefore, in this embodiment, even when the humidification operation is stopped, the growth of bacteria in the water in the storage unit 22 can be suppressed. As a result, users can easily use the humidifier 1000 without worrying about the growth of bacteria.

[0189] In this embodiment, the heating unit 31 has two PTC heaters 311 and 313. Even when the entire storage unit 22 is heated as in this embodiment, the power required for heating can be reduced by using PTC heaters.

[0190] In this embodiment, the humidifier 1000 further includes a blower 34 for sending mist to the outside. The storage unit 22 has an outlet 2253 for blowing out air supplied from the blower 34, and the outlet 2253 is connected to a flow path F2 of the duct 23. In other words, the air blown out from the outlet 2253 flows into the flow path F2, and very little air flows outside the duct 23.

[0191] Furthermore, the lower end 23a of the duct 23 is in contact with the bottom 223. In other words, the lower end 23a is immersed in the water stored in the reservoir 22. This ensures that the mist generated inside the duct 23 is reliably mixed with the air blown out from the outlet 2253, allowing the mist to be efficiently released to the outside.

[0192] In this embodiment, the humidifier 1000 further includes a reflector positioned at the upper end of the duct 23. The mist generated in the atomizing section 33 passes through the flow path F2 and rises towards the flow path F3 via the reflector 24. As explained with reference to Figure 17, the mist rises up the flow path F3 while swirling around the axis CX. This separates larger particles P from the mist. As a result, in this embodiment, the area around the humidifier 1000 is less likely to become damp or wet due to the released mist, thus improving comfort.

[0193] Furthermore, in this embodiment, the tank body 11 has a nozzle 13 located on its inner circumference 113. The nozzle 13 has a baffle plate 133. Larger particles contained in the mist collide with the baffle plate 133. This further separates the larger particles from the mist. In this way, by separating the larger particles from the mist with the reflector 24 and the baffle plate 133, problems such as the area around the humidifier 1000 becoming damp or wet are less likely to occur.

[0194] Furthermore, in this embodiment, the control unit 50 is configured to complete the heating process when the water temperature remains at or above a first temperature for a first time. By dividing the heating process into time segments in this way, power consumption during the heating process can be suppressed in this embodiment.

[0195] Furthermore, in this embodiment, the control unit 50 is configured to perform the heating process at predetermined intervals. Specifically, the control unit 50 is configured to start the heating operation to begin the next heating process after a second time has elapsed since the completion of the heating process. In other words, the heating operation is not performed continuously in the humidifier 1000. By performing the heating process at predetermined intervals in this way, power consumption due to heating can be further reduced compared to the case where heating operation is performed continuously.

[0196] With the humidifier 1000 configured as described above, a superior humidifier can be provided. In addition, various other desirable effects can be obtained from this embodiment.

[0197] In this embodiment, the main body 200 may further include an insulating material. The insulating material may be placed, for example, in the space SP (shown in Figure 14) inside the housing 21 so as to surround the storage section 22 from the outside.

[0198] Furthermore, the arrangement of the heating elements in the heating section 31 is not limited to the examples described above. In one example, the heating elements of the heating section 31 may be arranged entirely around the bottom 223. In another example, the heating elements may be arranged along the wall 221. In this case, multiple heating elements may be arranged facing each other across the atomizing section 33. The opening of the bottom 223 can be appropriately modified depending on the arrangement of the heating elements.

[0199] Furthermore, although this embodiment discloses an example in which the heating unit 31 is located outside the duct 23, the heating unit 31 may also be located inside the duct 23. In other words, the heating unit 31 and the atomizing unit 33 may be located inside the duct 23. In this case, the heating unit 31 can maintain localized heating performance. Moreover, by arranging the heating unit 31 and the atomizing unit 33 inside the duct 23, it becomes possible to design the housing 21 in a way that contributes to integration and miniaturization, thereby improving the design flexibility of the housing 21.

[0200] Furthermore, the humidifier 1000 may have other functions that can be performed in response to instructions from the control unit 35. For example, the humidifier 1000 may have an internal drying function that can dry the inside of the reservoir 22. In another example, the humidifier 1000 may have an illumination function that changes the light of the indicator or the light-emitting unit 36. In yet another example, the humidifier 1000 may have a function to switch the operation sound on and off. In yet another example, the humidifier 1000 may have a function to switch the power-on sound on and off. In yet another example, the humidifier 1000 may have a function that allows the user to set the target value of the atomization amount to any value. The humidifier 1000 may have other functions besides those described above.

[0201] In this embodiment, the lowest power operation, low power operation, medium power operation, intermittent humidification, and low humidification described above correspond to a first mode in which the target value of atomization does not change during the heating process; the high power operation and high humidification described above correspond to a second mode in which the atomization amount is limited to a target value during the heating process; and the rapid mode described above corresponds to a third mode in which the heating unit 31 is not operated. In this case, the target value of atomization in the lowest power operation, low power operation, medium power operation, intermittent humidification, and low humidification corresponds to a first amount; the target value of atomization in the high power operation and high humidification corresponds to a second amount; and the target value of atomization in the rapid mode corresponds to a third amount. [Explanation of symbols]

[0202] 11...Tank body, 13...Nozzle, 21...Housing, 22...Storage section, 23...Duct, 23a...Lower end, 24...Reflector, 31...Heating section, 32...Solenoid valve, 33...Atomizing section, 34...Air blowing section, 41...Water level detection section, 42...Temperature and humidity detection section, 43...Water temperature detection section, 50...Control unit, 100...Tank section, 111...Outer circumference, 113...Inner circumference, 131...Nozzle body, 133...Baffle plate, 200...Main body section, 241...Cylindrical section, 243...Guide section, 243A...Discharge port, 1000...Humidifier, 2253...Outlet, F1, F2, F3...Flow path.

Claims

1. A storage section having a bottom and a wall extending upward from the bottom, for storing water, The atomizing unit is located at the bottom and atomizes the water stored in the storage unit to generate mist, The storage section includes a duct that is detachably arranged around the atomizing section and has a first flow path extending upward, A heating unit is provided in the storage unit for heating the water, Equipped with, The aforementioned duct is, Having a lower end that contacts the bottom, The storage section is divided into the space inside the duct where the atomizing section is located and the space between the duct and the wall for storing water. The lower end portion has a structure that allows the water heated by the heating section to be stored between the duct and the wall and supplied to the atomizing section. Humidifier.

2. The structure is an opening at the lower end through which the duct passes, When the water is supplied to the atomizing unit through the opening, mist is generated by the atomizing unit. The humidifier according to claim 1.

3. The heating unit is located at the bottom between the duct and the wall and has at least one heating element capable of heating the water stored in the storage unit. The humidifier according to claim 2.

4. The system further includes a blower for sending the mist to the outside, The storage section is connected to the first flow path of the duct and has an outlet for blowing out the air supplied from the blowing section. The humidifier according to claim 1.

5. The duct is further provided with a reflector positioned at the upper end of the duct, which causes the mist that has passed through the first flow path to form a swirling flow centered on the axis of the duct. The humidifier according to claim 1.

6. The reflector has a plurality of guide portions arranged in the circumferential direction with respect to the axis, Each of the aforementioned guide sections has a discharge port that opens in the circumferential direction. The humidifier according to claim 5.

7. Further comprising a tank body positioned above the storage section and supplying the water to the storage section, The tank body includes a second flow path connected to the first flow path and has an inner circumference extending upward, The reflector is positioned inside the inner circumference, A portion of the mist, as it passes through the second channel while swirling due to the reflector, collides with the inner surface of the inner circumference. The humidifier according to claim 5.

8. The tank body further includes a nozzle located at the upper end of the inner circumference, The nozzle includes a baffle plate that obstructs the rise of the mist. In the inner circumference, the reflector and the baffle plate are arranged in this order in the upward direction. The mist is released to the outside by passing through the gap formed between the inner circumference and the baffle plate. The humidifier according to claim 7.

9. A tank body positioned above the storage section, The system further includes a water supply valve, which is positioned between the tank body and the storage section and supplies water from the tank body to the storage section in conjunction with the water level of the water stored in the storage section. The humidifier according to claim 1.

10. The tank further comprises a cartridge disposed between the tank body and the storage section for purifying the water in the tank body, The cartridge has the water supply valve. The humidifier according to claim 9.

11. A control unit for controlling the atomizing unit and the heating unit, The storage unit further comprises a water temperature detection unit for detecting the temperature of the water stored in the storage unit, The control unit, in the process of heating the water by the heating unit during humidification operation or when humidification operation is stopped, When the water temperature detected by the water temperature detection unit remains at or above a first temperature for a first time, the heating process is completed. The humidifier according to claim 1.

12. After the completion of the heating process, and after a second time has elapsed since the heating process, the control unit starts operating the heating unit to begin the next heating process. The humidifier according to claim 11.

13. The system further comprises a control unit for controlling the atomizing unit and the heating unit, The control unit, The target amount of water atomized per unit time by the atomizing unit is a first amount that does not exceed the amount suitable for heating operation, and in the water heating step by the heating unit, there is a first mode in which the first amount does not change, A second mode in which the target amount of water atomized per unit time by the atomizing unit is a second amount greater than the first amount, and the target amount of water atomized per unit time in the heating step is limited to an amount suitable for heating operation that is less than the second amount, It has, The humidifier according to claim 1.

14. The control unit further includes a third mode in which the target amount of water atomized per unit time by the atomizing unit is a third amount greater than the second amount, and the heating unit is not operated. The humidifier according to claim 13.

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