Humidifier and cylinder

Abstract

To provide a humidifier having a structure capable of easily suppressing intrusion of drain water to an air duct when discharging water in a water tank in the humidifier in which the water tank is fixed to inside.SOLUTION: A humidifier includes a body and a grip. The body includes a body cylinder part and body bottom part, and the grip is mounted to the body cylinder part. The body includes a water tank, an air blowing fan and an air duct. The water tank includes a bottom part, a cylinder part extending upwardly from the bottom part and an opening part located at an upper end of the cylinder part, and is fixed to inside of the body. The air blowing fan is connected to the air duct, and the air duct includes an air supply port. The air supply port is located above an upper limit water level of the water tank in the water tank, and is disposed in the proximity of the grip, viewed from the upper side.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a humidifier and a cylinder for use in a humidifier. [Background technology]

[0002] Some humidifiers have detachable water tanks. Users remove the water tank from the humidifier to fill or drain the water in the water tank. This reduces the risk of the air blower unit and other components inside the humidifier becoming submerged in water when filling or draining the water tank. For example, Patent Document 1 discloses a humidifier with a detachable water tank. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-275925 Summary of the Invention [Problem to be solved by the invention]

[0004] When the water tank is fixed inside the humidifier, the user may tilt the humidifier to drain the water from the tank. This can cause the water to flow into the air duct connected to the water tank. The water that gets into the air duct can damage the blower unit and other components.

[0005] Therefore, the object of the present invention is to provide a humidifier having a water tank fixed inside, which has a structure that can easily prevent drainage water from entering the air duct when draining water from the water tank. [Means for solving the problem]

[0006] The humidifier of the present invention comprises a main body and a handle, the main body having a main body tubular portion and a main body bottom, the handle being attached to the main body tubular portion, the main body including a water tank, an air supply fan, and an air duct, the water tank having a bottom, a tubular portion extending upward from the bottom, and an opening located at the upper end of the tubular portion, and being fixed within the main body, the air supply fan being connected to the air duct, and the air duct having an air supply port, the air supply port being located within the water tank above the upper water level of the water tank and being close to the handle when viewed from above. [Effects of the Invention]

[0007] According to the present invention, a humidifier having a water tank fixed inside can be provided that has a structure that can easily prevent drainage water from entering the air duct when draining water from the water tank. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of the humidifier as seen from diagonally above and to the rear right. [Figure 2] FIG. 2 is a perspective view of the humidifier seen from diagonally above and to the rear right, so that the inside of the main body can be seen. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. [Figure 4] Figure 4 shows the main body viewed from above with the top cover and cylinder removed. [Figure 5] FIG. 5 is a perspective view of the top cover, cylinder, and main body disassembled from an upper right rear and obliquely upward. [Figure 6] Fig. 6(a) is a diagram showing a state in which the main body 12 is tilted in the front-to-back direction to drain the water from the water tank, and Fig. 6(b) is a diagram showing a state in which the main body 12 is tilted in the left-to-right direction to drain the water from the water tank. [Figure 7] FIG. 7 is a perspective view of the humidifier as seen from diagonally above and to the rear right, so that the inside of the main body of the first modified example can be seen. [Figure 8]FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. [Figure 9] FIG. 9 is a perspective view of the cylinder of the first modified example, seen obliquely from above and rear right. [Figure 10] Figure 10(a) is a perspective view of the humidifier of the second modified example, seen diagonally from above on the front right, and Figure 10(b) is a view of the humidifier main body of the modified example, seen from above, with the top cover and cylinder removed. [Figure 11] Figure 11(a) is a perspective view of the humidifier of the third modified example, seen diagonally from above on the front right, and Figure 11(b) is a view of the humidifier main body of the modified example, seen from above, with the top cover and cylinder removed. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, the structure of a humidifier 10 according to one embodiment of the present invention will be described with reference to FIGS.

[0010] As shown in FIG. 1 , the direction in which the main body 12 extends is defined as the up-down direction. The direction in which the top cover 14 is positioned relative to the main body 12 is defined as up, and the opposite direction is defined as down. The direction in which the handle 16 is positioned relative to the main body 12 is defined as rear, and the opposite direction is defined as front. When viewing the main body 12 from the front, the left hand is defined as left and the right hand is defined as right. The up-down direction, left-right direction, and front-back direction are perpendicular to each other. Note that the up-down direction, left-right direction, and front-back direction are defined for the sake of convenience. Therefore, the up-down direction, left-right direction, and front-back direction do not have to coincide with the up-down direction, left-right direction, and front-back direction when the humidifier 10 is in use. Furthermore, the up-down direction and the down-down direction may be interchanged, the left-right direction may be interchanged, and the front-back direction may be interchanged.

[0011] As shown in FIG. 1, the humidifier 10 has a shape similar to a large cup with a handle. Specifically, the humidifier 10 includes a main body 12, a top cover 14, and a handle 16. The main body 12 has a tubular main body portion 12a and a main body bottom portion 12b. The tubular main body portion 12a extends in the vertical direction. In this embodiment, the tubular main body portion 12a is a cylindrical member extending in the vertical direction. An upper handle mounting portion 12a1 is provided at the upper rear side of the tubular main body portion 12a. A lower handle mounting portion 12a2 is provided at the lower rear side of the tubular main body portion 12a. The upper handle mounting portion 12a1 and the lower handle mounting portion 12a2 overlap when viewed from above. The main body bottom portion 12b covers the lower end of the tubular main body portion 12a. The upper end of the tubular main body portion 12a is open.

[0012] The top cover 14 is detachably fitted onto the upper end of the main body tubular portion 12a. The top cover 14 is a plate-like member. When viewed from above, the top cover 14 has a circular shape. The top cover 14 has an air outlet 14a. When viewed from above, the air outlet 14a has a substantially rectangular shape with long sides in the left-right direction. The air outlet 14a penetrates the top cover 14 in the vertical direction.

[0013] The handle 16 is attached to the tubular main body portion 12a. The handle 16 is an arch-shaped member extending in the vertical direction. The upper end of the handle 16 is attached to the upper handle attachment portion 12a1. The lower end of the handle 16 is attached to the lower handle attachment portion 12a2. A space SP1 is formed between the handle 16 and the main body 12. The cross section of the handle 16 perpendicular to the vertical direction has a substantially semicircular shape. The arc of the substantially semicircular shape is located on the side of the space SP1. The handle 16 may be a member that forms a substantially rectangular shape when viewed from the left or right. The handle 16 may be an L-shaped member when viewed from the left or right, and only one end of the handle 16 may be attached to the tubular main body portion 12a.

[0014] As shown in FIGS. 2 and 3, the main body 12 includes a water tank 18, a cylinder 20, a float 22, an ultrasonic vibration unit 24, a control unit 26, an air supply fan 28, and an air duct 30.

[0015] The water tank 18 is fixed within the main body 12. The water tank 18 has a cylindrical portion 18a, a bottom portion 18b, an opening 18c, and a water level upper limit hole 18d. The cylindrical portion 18a extends upward from the bottom portion 18b. The bottom portion 18b is located above the ultrasonic vibration unit 24. The bottom portion 18b is a cone-shaped plate-like member. More specifically, the bottom portion 18b is a plate-like member with an approximately truncated cone shape. The approximately truncated cone shape tapers downward. The lower end surface of the bottom portion 18b is circular. An ultrasonic vibrator 24a (described later) is provided at the center of the lower end surface of the bottom portion 18b. The opening 18c is located at the upper end of the cylindrical portion 18a. The water level upper limit hole 18d penetrates the inner and outer peripheral surfaces 18e and 18c of the cylindrical portion 18a of the water tank 18. The water level upper limit hole 18d is located at the upper rear portion of the cylindrical portion 18a. The position of the water level upper limit hole 18d corresponds to the upper limit water level HL. The upper limit water level HL is the allowable limit water level when more water than the specified amount is supplied to the water tank 18. The water tank 18 stores water W, which the user supplies through the opening 18c.

[0016] The cylinder 20 is a cylindrical member extending in the vertical direction. The cylinder 20 is located within the water tank 18. The cylinder 20 is detachable from the water tank 18. A space SP2 is provided between the cylinder 20 and the water tank 18. More specifically, the cylinder 20 has a cylindrical portion 20a, an extension portion 20b, and a bottom portion 20c. The cylinder portion 20a is a cylindrical member extending in the vertical direction. The outer diameter of the cylinder portion 20a is smaller than the inner diameter of the water tank 18. A plurality of slits 20s are provided on the outer surface of the cylinder portion 20a. Specifically, the cylinder portion 20a has slits 20s provided in the circumferential direction. The slits 20s are arranged at equal intervals in the vertical direction. The slits 20s penetrate the outer and inner surfaces of the cylinder portion 20a. The slits 20s allow air and water to pass between the outside and inside of the cylinder portion 20a. The bottom portion 20c is a plate-like member that covers the lower end of the cylinder portion 20a. A circular hole is formed in the center of the bottom portion 20c. The circular hole faces the ultrasonic vibrator 24a (described later). The bottom portion 20c is located above the bottom portion 18b of the water tank 18.

[0017] The extension portion 20b is a trumpet-shaped plate-like member that widens upward from the upper end of the cylinder portion 20a. Specifically, the lower end of the extension portion 20b is connected to the upper end of the cylinder portion 20a. The extension portion 20b widens radially from the lower end to the upper end. The upper end of the extension portion 20b has a circular shape when viewed from above. The outer diameter of the upper end of the extension portion 20b is slightly smaller than the outer diameter of the top cover 14. The top cover 14 is removably fitted onto the upper end of the extension portion 20b. The top cover 14 and the cylinder 20 are integrated.

[0018] The extension portion 20b includes a vent portion 20d. The vent portion 20d is formed at the rear of the extension portion 20b. Specifically, the vent portion 20d is formed by a left side plate 20d1, a right side plate 20d2, and a closing plate 20d3. The left side plate 20d1 and the right side plate 20d2 are generally fan-shaped plate-like members extending rearward from the rear of the extension portion 20b. The left side plate 20d1 and the right side plate 20d2 are parallel to each other. The closing plate 20d3 is a plate-like member conforming to the inner circumferential surface of the cylindrical portion 18a of the water tank 18. The closing plate 20d3 extends downward from the upper end of the extension portion 20b. The left end of the closing plate 20d3 is connected to the rear end of the left side plate 20d1. The right end of the closing plate 20d3 is connected to the rear end of the right side plate 20d2. The closing plate 20d3 closes the water level upper limit hole 18d. More specifically, the closing plate 20d3 is in contact with the inner circumferential surface of the cylindrical portion 18a. The closing plate 20d3 is positioned so as to face the water level upper limit hole 18d.

[0019] The float 22 includes an upper plate 22a, a connecting portion 22b, a lower plate 22c, and a truncated conical cylindrical portion 22d. The upper plate 22a and the lower plate 22c are plate-like members having the same circular shape when viewed from above. The connecting portion 22b is composed of two plate-like members extending in the vertical direction that form a cross when viewed from above. The truncated conical cylindrical portion 22d is a cylindrical member having a truncated conical shape extending in the vertical direction. The upper plate 22a, the connecting portion 22b, the lower plate 22c, and the truncated conical cylindrical portion 22d are integrated in this order from top to bottom, sharing the same central axis. A cylindrical portion 22e is formed along the central axis of the upper plate 22a and the connecting portion 22b. The upper end of the cylindrical portion 22e penetrates the upper plate 22a. The lower end of the cylindrical portion 22e is connected to the truncated conical cylindrical portion 22d. The float 22 floats on the water W in the cylinder 20. More specifically, the upper plate 22a is in contact with the surface of the water W. The float 22 is located inside the cylinder 20 so that the outer edges of the upper plate 22a and the lower plate 22c are aligned with the inner circumferential surface of the cylinder 20. The float 22 moves up and down in accordance with fluctuations in the water level of the water W stored in the water tank 18.

[0020] The ultrasonic vibration unit 24 includes an ultrasonic vibrator 24a and a high-frequency voltage circuit 24b. The ultrasonic vibrator 24a is a disc-shaped piezoelectric ceramic plate with metal electrodes plated on both sides. The ultrasonic vibrator 24a is in contact with the water W stored in the water tank 18. The high-frequency voltage circuit 24b supplies a high-frequency voltage to the ultrasonic vibrator 24a.

[0021] The control unit 26 is located at the lower front portion of the main body 12. The control unit 26 includes an operation panel (not shown). The control unit 26 controls the humidifier 10 in response to operations on the operation panel by the user.

[0022] The air supply fan 28 includes an air inlet 28a and an air outlet 28b. The air supply fan 28 is, for example, a sirocco fan. The air inlet 28a is located below the handle 16. The air inlet 28a opens to the outer circumferential surface of the tubular main body portion 12a. The air inlet 28a penetrates the tubular main body portion 12a.

[0023] The air duct 30 is a cylindrical member extending in the vertical direction. The cross section of the air duct 30 perpendicular to the vertical direction has a substantially rectangular shape. The upper end of the air duct 30 opens into the water tank 18. More specifically, the air duct 30 has an air supply port 30a at its upper end. The air supply port 30a is located within the water tank 18. Specifically, the air supply port 30a is located within the vent portion 20d. The air supply port 30a is located above the upper water level HL of the water tank 18. As shown in FIG. 4 , the air supply port 30a is adjacent to the handle 16 when viewed from above. More specifically, the air supply port 30a is adjacent to the handle mounting upper portion 12a1 when viewed from above. The lower end of the air duct 30 is connected to the air supply fan 28. More specifically, the air duct 30 has an air intake 30b at its lower end. The air intake 30b is connected to the air discharge port 28b of the air supply fan 28.

[0024] Next, the operation of the humidifier 10 will be described with reference to FIG. 3. A user starts operation of the humidifier 10 by operating an operation panel (not shown). The control unit 26 drives the ultrasonic vibration unit 24. When the ultrasonic vibration unit 24 is driven, ultrasonic waves are emitted from the ultrasonic vibrator 24a. The ultrasonic waves emitted from the ultrasonic vibrator 24a are transmitted to the float 22 via the water W in the cylinder 20. The float 22 resonates with the ultrasonic waves. Fine, atomized water droplets (mist M) are generated on the surface of the water W in the cylinder 20. The control unit 26 drives the air supply fan 28. Air sent from the air supply fan 28 flows in the direction indicated by the white arrow in FIG. 3. Specifically, the air sent from the air supply fan 28 passes through the air duct 30 and is guided to the vent portion 20d. The air guided into vent portion 20d flows downward along the outer peripheral surface of extension portion 20b and into space SP2. When the air pressure in space SP2 increases, the air in space SP2 flows into cylinder 20 through slit 20s located above the water surface of water W in water tank 18. When the air pressure in cylinder 20 further increases, the air in cylinder 20 flows out of humidifier 10 from air outlet 14a. At this time, mist M that has accumulated in cylinder 20 is released out of the humidifier 10 together with the air flowing out of the humidifier 10.

[0025] Next, the operation of replacing the water W in the water tank 18 will be described with reference to Figures 5 and 6. First, the user drains the water W from the water tank 18. The user removes the integrated top cover 14 and cylinder 20 upward through the opening 18c. The user then removes the float 22 from the water tank 18.

[0026] The user grasps the handle 16 and tilts the humidifier 10 to discharge the water W in the water tank 18. Specifically, the user grasping the handle 16 tilts the main body 12 so that the opening 18c faces downward. The user grasping the handle 16 is made aware of the direction in which to tilt the main body 12. For example, as shown in FIG. 6(a), a user grasping the handle 16 with their right or left hand tilts the main body 12 in the front-to-back direction so that the opening 18c faces downward. As shown in FIG. 6(b), a user grasping the handle 16 with their right hand tilts the main body 12 in the left-to-right direction so that the opening 18c faces downward. The water W flows along the inner circumferential surface 18e of the water tank 18 and is discharged from the opening 18c. At this time, the air supply port 30a is positioned above the water W flowing along the inner circumferential surface 18e. Therefore, the discharged water W does not flow into the air duct 30. There is no need to install a water intrusion prevention device such as a check valve at the air supply port 30a. According to the humidifier 10, when the water W in the water tank 18 is drained, the intrusion of the drained water into the air duct 30 is easily prevented.

[0027] After completing the draining operation, the user supplies water into the water tank 18 through the opening 18c. The user supplies a specified amount of water into the water tank 18. If the user supplies more water than the specified amount, the water W in excess of the specified amount flows out of the water tank 18 through the water level upper limit hole 18d. Therefore, the water W in excess of the specified amount is not stored in the water tank 18. Because the air supply port 30a is located above the upper limit water level HL of the water tank 18, wastewater does not enter the air duct 30 through the air supply port 30a when supplying water.

[0028] After completing the water supply operation, the user installs the cylinder 20 into the water tank 18. The user inserts the float 22 into the cylinder 20. The user then attaches the top cover 14 to the cylinder 20. The opening 18c is closed by the top cover 14. Furthermore, the top cover 14 fits into the upper end of the main body tubular portion 12a. The water level upper limit hole 18d is closed by the closure plate 20d3. Therefore, when the humidifier 10 is in use, mist M will not leak out from the water level upper limit hole 18d. Furthermore, the air pressure in the space SP2 will not decrease, and the amount of mist M emitted from the outlet 14a will not decrease. The user can then operate the humidifier 10.

[0029] Next, the structure of a humidifier 10a according to a first modified example of the present invention will be described with reference to Figures 7 to 9. The external shape of the humidifier 10a is the same as that of the humidifier 10. Differences between the humidifier 10a and the humidifier 10 will be mainly described.

[0030] The humidifier 10a does not have an air duct 30. The handle 16 has a function of supplying air into the water tank 18. Specifically, the handle 16 has a cylindrical shape extending in the vertical direction. The handle 16 has an upper end opening 16a and a lower end opening 16b. The shapes of the upper end opening 16a and the lower end opening 16b are the same as the cross-sectional shape of the handle 16 perpendicular to the vertical direction. The shapes of the upper end opening 16a and the lower end opening 16b are approximately semicircular with the arcs facing the space SP1. The upper end opening 16a is connected to the inside of the water tank 18 via an air supply port 32, which will be described later. Specifically, the upper end opening 16a is attached to the upper rear part of the water tank 18 so as to penetrate the water tank 18 in the front-rear direction. The upper end opening 16a is located above the upper water level HL of the water tank 18. The upper end opening 16a is in contact with the inner circumferential surface 18e. The upper end opening 16a is connected to the air supply port 32. The lower end opening 16b is attached to the lower rear part of the main body 12 so as to penetrate the main body 12 in the front-to-rear direction. The lower end opening 16b is in contact with the inner peripheral surface of the main body tubular portion 12a. The lower end opening 16b is connected to the air discharge port 28b of the air supply fan 28.

[0031] The closing plate 20d3 has an air supply port 32. The air supply port 32 is located at the top of the closing plate 20d3. The air supply port 32 penetrates the closing plate 20d3 in the front-to-rear direction. The shape of the air supply port 32 is approximately semicircular with the arc facing downward. The shape of the air supply port 32 is approximately the same as the shape of the upper end opening 16a. The water level upper limit hole 18d is blocked by the lower part of the closing plate 20d3.

[0032] In this way, the handle 16 functions as a duct. Air is supplied from the air supply fan 28 into the water tank 18 via the handle 16. By streamlining the structure for supplying air into the water tank 18, it is possible to reduce the space required for the water tank 18 or increase the capacity of the water tank 18. This also reduces the manufacturing cost of the humidifier 10a.

[0033] Next, the structure of a humidifier 10b according to a second modified example of the present invention will be described with reference to Figures 10(a) and 10(b). The external shape of the humidifier 10b is the same as that of the humidifier 10. Differences between the humidifier 10b and the humidifier 10 will be mainly described.

[0034] The tubular main body portion 12a is provided with a left support portion 12a3 and a right support portion 12a4. The left support portion 12a3 and the right support portion 12a4 face each other. A handle 161 protrudes upward from the main body 12. Specifically, the handle 161 is a plate-like member. When viewed from the front or rear, the handle 161 has a generally semicircular shape protruding upward from the upper portion of the tubular main body portion 12a. A left end portion 161a of the handle 161 is attached to the left support portion 12a3. A right end portion 161b of the handle 161 is attached to the right support portion 12a4. The handle 161 can rotate relative to the main body 12 around a rotation center axis Ax connecting the left support portion 12a3 and the right support portion 12a4. As shown in FIG. 10(b), the air supply port 30a is located close to the right support portion 12a4 when viewed from above. The air supply port 30a may be located close to the left support portion 12a3 when viewed from above.

[0035] When discharging water W from water tank 18, the user grasps handle 161 and rotates main body 12 so that opening 18c faces downward. Main body 12 may be rotated either clockwise or counterclockwise. At this time, air supply port 30a is positioned above water W flowing along inner circumferential surface 18e. Therefore, the discharged water W does not flow into air duct 30. With humidifier 10b, when discharging water W from water tank 18, the intrusion of discharged water into air duct 30 is easily prevented.

[0036] Next, the structure of a humidifier 10c according to a third modified example of the present invention will be described with reference to Figures 11(a) and 11(b). The external shape of the humidifier 10c is the same as that of the humidifier 10. Differences between the humidifier 10c and the humidifier 10 will be mainly described.

[0037] A handle attachment portion 12a5 is provided on the upper rear portion of the tubular main body portion 12a. The handle 162 extends forward and upward from the handle attachment portion 12a5. Specifically, the handle 162 is a plate-like member. When viewed from the left or right, the handle 162 has a generally arcuate shape extending forward and upward from the handle attachment portion 12a5. As shown in FIG. 11(b), the air supply port 30a is located close to the handle attachment portion 12a5 when viewed from above. The handle 162 may also extend linearly forward and upward from the handle attachment portion 12a5.

[0038] When draining water W from water tank 18, the user grips handle 162 and tilts main body 12 forward so that opening 18c faces downward. At this time, air supply port 30a is positioned above water W flowing along inner circumferential surface 18e. Therefore, the drained water W does not flow into air duct 30. With humidifier 10c, when draining water W from water tank 18, the intrusion of drained water into air duct 30 is easily prevented.

[0039] The humidifier according to the present invention is not limited to the humidifiers 10, 10a, 10b, and 10c according to the embodiments, and can be modified within the scope of the invention. Furthermore, the structures of the humidifiers 10, 10a, 10b, and 10c may be combined in any manner. [Explanation of symbols]

[0040] 10, 10a, 10b, 10c: Humidifier 26: Control unit 12: Main body 28: Ventilation fan 14: Top cover 30: Air duct 16: Handle 32: Air supply port 18: Water tank W: Water 20: Cylinder M: Mist 22: Float SP1, SP2: Space 24: Ultrasonic vibration unit HL: Upper water level

Claims

1. The device comprises a main body and a handle, The main body has a main body tubular portion and a main body bottom portion, The handle is attached to the main body tube portion, The main body includes a water tank, an air supply fan, and an air duct. the water tank has a bottom, a cylindrical portion extending upward from the bottom, and an opening located at an upper end of the cylindrical portion, and is fixed within the main body; The air supply fan is connected to the air duct, the air duct has an air supply port; The air supply port is located in the water tank above an upper water level of the water tank and is adjacent to the handle when viewed from above. A humidifier characterized by:

2. The device comprises a main body and a handle, The main body has a main body tubular portion and a main body bottom portion, The main body tube portion is provided with a left support portion and a right support portion at opposing positions, The main body includes a water tank, an air supply fan, and an air duct. the water tank has a bottom, a cylindrical portion extending upward from the bottom, and an opening located at an upper end of the cylindrical portion, and is fixed within the main body; The air supply fan is connected to the air duct, the air duct has an air supply port; the handle projects upward from the main body, and a left end of the handle is attached to the left support portion and a right end of the handle is attached to the right support portion so as to be rotatable relative to the main body; The air supply port is located in the water tank above an upper water level limit of the water tank and is adjacent to either the left support portion or the right support portion when viewed from above. A humidifier characterized by:

3. The device comprises a main body and a handle, The main body has a main body tubular portion and a main body bottom portion, A handle attachment portion is provided on the upper rear side of the main body cylindrical portion, The handle extends forward and upward from the handle attachment portion, The main body includes a water tank, an air supply fan, and an air duct. the water tank has a bottom surface, a cylindrical portion extending upward from the bottom surface, and an opening portion located at an upper end, and is fixed within the main body; The air supply fan is connected to the air duct, the air duct has an air supply port; The air supply port is located in the water tank above an upper water level of the water tank and is adjacent to the handle attachment portion when viewed from above. A humidifier characterized by:

4. The device comprises a main body and a handle, The main body has a main body tubular portion and a main body bottom portion, The handle is attached to the main body tube portion, The main body includes a water tank and an air supply fan. the water tank has a bottom, a cylindrical portion extending upward from the bottom, and an opening located at an upper end of the cylindrical portion, and is fixed within the main body; The handle has a cylindrical shape extending in the vertical direction and has an upper end opening and a lower end opening, The upper end opening is connected to the inside of the water tank so as to be located above an upper water level of the water tank, The lower end opening is connected to the air supply fan. A humidifier characterized by:

5. The water tank has a water level upper limit hole penetrating the inner and outer surfaces of the water tank. A humidifier according to any one of claims 1 to 4.

6. The humidifier further includes a cylinder that is a cylindrical member extending in a vertical direction, the cylinder is detachably mounted within the water tank so as to define a space between the cylinder and the water tank; The cylinder has a closure plate that contacts the water tank so as to close the water level upper limit hole.

6. The humidifier according to claim 5.

7. A cylinder for use in a humidifier, The humidifier includes a water tank, the water tank has a bottom, a cylindrical portion extending upward from the bottom, and an opening located at an upper end of the cylindrical portion, and is fixed within the main body; The water tank has an upper water level hole penetrating the inner and outer surfaces of the water tank, The cylinder is a tubular member extending in the vertical direction, and has a plurality of slits on its outer surface. the cylinder is detachably mounted and positioned within the water tank so as to have a space between the cylinder and the water tank; The cylinder has a closure plate that contacts the water tank so as to close the water level upper limit hole. A cylinder characterized by:

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