JP6797766B2 - Humidifier - Google Patents

Description

The present invention relates to a humidifier for preventing indoor drying.

Conventionally, a vaporization type humidifier has been proposed in which a vaporization filter is installed in a water tank containing water and air is blown to the vaporization filter to generate humidified air. In particular, among these vaporization types, the one equipped with a heater is also called a hybrid type, in which the dry air in the room is blown to the vaporization filter as warm air, and the air that passes through the vaporization filter by the heater is blown. By raising the temperature, the vaporization efficiency can be increased and the amount of humidification can be increased.

Japanese Unexamined Patent Publication No. 2014-20635

As described above, in a hybrid humidifier equipped with a heater inside, in order to perform safe and stable humidification, it is important to suppress the local temperature rise of the heater and make the warm air temperature uniform. .. If the air flow between the suction port and the heater is straight, the air taken in from the suction port passes through the heater evenly, so that the warm air temperature becomes uniform. However, depending on the layout of the internal structure, the flow of air passing through the suction port and the heater is often not straight.

When the ventilation path is curved and the direction of the air flow changes, the flow velocity of the air is slow inside the curved curve of the air flow, and the flow velocity is high outside, so that the amount of air passing through the heater varies. In particular, if the amount of air passing through the part where the heating wires are densely reduced, the temperature of the hot air locally rises depending on the amount of heat generated by the heater, which shortens the life of the heater and deforms the vaporization filter downstream of the heater. It may cause discoloration.

The present invention is for solving the above problems, and provides a humidifying device capable of suppressing a local temperature rise of a heater and performing safe and stable humidification.

The present invention includes a water tank portion that is detachably attached to the main body and can store a certain amount of water from the water supply tank.
A blower that blows air into the ventilation path from the suction port to the air outlet,
A warm air heater provided on the upstream side of the blower to heat the air taken in from the suction port, and
A vaporization filter installed in the ventilation passage by immersing the lower part in the water of the water tank portion is provided.
The ventilation path has a direction in which the flow of air flowing into the suction port and the flow of air passing through the hot air heater are different.
The inner side of the main body with respect to the suction port is the outside of the portion where the air flow bends.
The hot air heater has a heating wire dense portion where the density of the heating wire is higher than that of other portions.
The humidifying device is characterized in that the heating wire dense portion is arranged on the inner side of the main body with respect to the suction port.

With the above configuration, it is possible to suppress the local temperature rise of the heater and perform safe and stable humidification.

It is an external perspective view which shows an example of the humidifying apparatus of this embodiment. It is a vertical cross-sectional view which shows an example of the humidifying apparatus of this embodiment. It is the top view of the water tank part with the vaporization filter installed. It is an internal perspective view on the back side of the humidifier of this embodiment. It is a structural drawing which shows an example of the heater for hot air in this embodiment. It is a figure which shows the air flow in a ventilation path. It is a top view which shows the arrangement of the heater for hot air in a humidifier.

Embodiments of the present invention considered to be suitable will be briefly described by showing the effects of the present invention.

The present invention is a so-called hybrid type humidifying device in which a vaporization filter is installed in a water tank portion in which water is stored, and humidified air is generated by blowing warm air that has passed through a hot air heater to the vaporization filter. In the ventilation path, the flow of air flowing into the suction port and the flow of air passing through the heater for warm air are in different directions, and the dense heating wire dense part of the heater for hot air has a high density. , It is arranged on the back side of the main body with respect to the suction port. In the ventilation path, the inner side of the main body with respect to the suction port is outside the curve in which the air flow bends, so that the air flow velocity is high and the amount of ventilation is large. Therefore, by arranging the heating wire dense portion having a high density of heating wires on the back side of the main body with respect to the suction port, the ventilation amount of the heating wire dense portion does not decrease, so that the local rise in the heater temperature is suppressed. At the same time, by making the warm air temperature uniform, safe and stable humidification can be performed.

Further, the heating wire dense portion is arranged on the side surface side of the main body case facing the air passage regulating member with the ventilation passage in between. If the sealing of the contact part between the air passage regulating member and the main body case is incomplete, air will flow into the ventilation passage through the gap, and the amount of ventilation passing through the warm air heater will decrease, resulting in a decrease in the amount of ventilation. The temperature of the heater may rise. By arranging the heating wire dense part on the side surface side of the main body case facing the air passage regulating member across the ventilation path, that is, at a position away from the air passage regulating member, it becomes difficult to receive a change in the air volume due to the air flowing through the gap. Therefore, the local rise in the heater temperature can be suppressed more effectively.

Further, the air passage regulating member is composed of a partition plate that divides the inside of the water tank portion into a vaporization filter accommodating portion and a water supply tank accommodating portion. The ventilation path is formed by attaching the water tank to the main body, but if the operation is performed with the water tank attached incompletely, a gap will be created between the air passage regulating member and the main body case. , Air may flow into the ventilation passage through this gap, and the amount of ventilation of the warm air heater may decrease. Therefore, by providing a heating wire dense part at a position away from the gap between the air passage regulating member and the main body case, it becomes difficult to receive a change in the ventilation amount, and even if the water tank part is incompletely attached, the local heater temperature. Can be suppressed from rising.

Further, a safety device for detecting an abnormally high temperature of the hot air heater is provided so as to face the heating wire dense portion. Not only when the air passage regulating member is incompletely sealed, but also when the suction port is blocked or the vaporization filter is clogged (generally referred to as disturbance), the amount of ventilation may vary. Since the temperature of the heating wire dense part tends to be higher than other parts, by installing a safety device facing this part, it is possible to quickly detect an abnormality when the amount of air blown decreases due to disturbance and safety. Will be excellent.

The heater for hot air includes a coiled heating wire and a heater case that holds the heating wire in a wound state. By forming the heating wire into a coil shape, it becomes easier to adjust the amount of heat generated, but on the other hand, the portion where the wound heating wires overlap becomes a dense heating wire portion. Therefore, by not reducing the ventilation amount of the heating wire dense portion, the durability of the heater is further improved, and the humidifying device is excellent in safety.

Hereinafter, specific examples of the present invention will be described with reference to the drawings.

FIG. 1 is an external perspective view showing an example of a humidifying device according to the present embodiment, and FIG. 2 is a vertical sectional view showing an example of a humidifying device. On the top surface of the main body case 2 that constitutes the exterior of the main body 1, an air outlet 3 that blows out humidified air, an operation display unit 4 that displays an operation status as well as an operation button, and a water supply tank (not shown) are provided on the main body 1. A tank cover 6 that opens and closes when it is attached and detached is provided.

An insertion port 7 is provided in the lower part of the side surface of the main body 1, and a water tank accommodating portion 9 serving as a space for accommodating the water tank portion 8 is formed in the lower part of the main body 1 through the insertion port 7. It is freely inserted and removed from the insertion port 7 to the water tank accommodating portion 9. The water tank portion 8 is provided with a vaporization filter 10 that absorbs and moistens the water supplied from the water supply tank.

A blower 13 composed of a motor 11 and a sirocco fan 12 is provided above the vaporization filter 10, and is driven by the blower 13 to pass through the vaporization filter 10 from the suction port 14 on the back surface of the main body 1 to the air outlet on the top surface of the main body 1. Air is blown to the ventilation passage 15 leading to 3. Due to this ventilation, the indoor air taken in from the suction port 14 becomes humidified air when it sucks up the water in the water tank portion 8 and passes through the moist vaporization filter 10, and is discharged into the room from the outlet 3. This humidifies the air. Further, a warm air heater 16 for heating the air blown to the vaporization filter 10 is arranged in the ventilation passage 15 facing the insertion port 7 with the vaporization filter 10 interposed therebetween.

In the ventilation passage 15, the air taken into the main body 1 from the suction port 14 flows in in a substantially horizontal direction with respect to the main body 1 and flows downward through the ventilation passage 15 toward the warm air heater 16. That is, the air flow in the suction port 14 and the air flow in the warm air heater 16 are in different directions, and the air flow is bent in the ventilation passage 15.

FIG. 3 is a top view of the water tank portion in a state where the vaporization filter is installed. The water tank portion 8 is divided into a vaporization filter accommodating portion 18 in which the vaporization filter 10 is installed and a water supply tank accommodating portion 19 in which the water supply tank is mounted by a partition plate 17 standing upright from the bottom surface.

FIG. 4 is an internal perspective view of the back side of the humidifier. When the water tank portion 8 is attached to the main body 1, the partition plate 17 comes into contact with the inner member 2a of the main body case 2, thereby acting as an air passage regulating member that defines the ventilation passage 15.

When the water tank portion 8 is removed from the main body 1, the water tank accommodating portion 9 communicates with the outside of the main body 1 via the insertion port 7, so that the ventilation passage 15 becomes a closed path inside the main body 1. Not. When the water tank portion 8 is attached to the main body 1, the insertion port 7 is closed, and the partition plate 17 abuts on the inner member 2a of the main body case 2 to form a ventilation passage 15. Then, of the water tank portion 8 partitioned by the partition plate 17, the vaporization filter accommodating portion 18 constitutes a part of the ventilation passage 15.

The water supply tank accommodating portion 19 is provided with a float 20 that rotates according to the water level of the water tank portion 8, and the float 20 is detected and turned on at a position facing the float 20 across the wall surface of the water tank portion 8. A reed switch (not shown) that outputs an OFF signal is provided. When the water level of the water tank portion 8 becomes equal to or lower than a predetermined amount, the output of the reed switch is turned off, and the energization of the blower 13 and the hot air heater 16 is stopped. Further, even when the water tank portion 8 is removed from the main body 1, the output of the reed switch is turned off, so that the operation cannot be performed.

FIG. 5 is a structural diagram showing an example of the hot air heater 16 in the present embodiment. The hot air heater 16 includes a coil-shaped heating wire 30 that generates heat when energized, and a heater case 31 that holds the heating wire 30. The heater case 31 is composed of an insulator 32 for winding and fixing the heating wire 30 and a metal heater frame 33 provided on the outer shell of the insulator 32. The heater frame 33 is provided in the ventilation passage 15. The ventilation direction (vertical direction in FIG. 2) is open. Further, the insulator 32 includes one horizontal insulating plate 32a extending in the longitudinal direction of the heater frame 33, and a plurality of vertical insulating plates 32b intersecting the horizontal insulating plate 32a and extending in the lateral direction of the heater frame 33. , A safety device for detecting an abnormally high temperature of the heating wire 30 is attached to the lateral insulating plate 32a. The humidifying device of the present embodiment includes a thermostat 22 and a thermal fuse 23 as safety devices.

The length of the heating wire 30 is appropriately set according to the required calorific value and the size of the heater frame 33. However, if the heating wire 30 is shortened, the watt density becomes high, and the heating wire 30 becomes reddish due to the high surface temperature and the life is shortened. Therefore, the heating wire 30 needs to have a certain length and thickness. Become. By lengthening or thickening the heating wire 30, the surface area of the heating wire 30 is increased, so that the watt density is lowered and the durability can be improved.

The heating wire 30 is wound and fixed to the insulator 32, and is wound in a plurality of stages so as to be housed in the heater frame 33. Therefore, the hot air heater 16 has a portion where the heating wire 30 is wound in a larger number of stages than the others, and this portion becomes a heating wire dense portion 34 having a high density of the heating wire 30. The thermostat 22 and the thermal fuse 23, which are safety devices, are arranged at positions facing the heating wire dense portion 34.

Next, the air flow in the ventilation passage 15 and the arrangement of the hot air heater 16 will be described with reference to FIGS. 6 and 7. FIG. 6 is a diagram showing the flow of air in the ventilation passage, and FIG. 7 is a top view showing the arrangement of hot air heaters in the humidifier.

As shown by the white arrows in FIG. 6, the air taken into the main body 1 from the suction port 14 flows in in a substantially horizontal direction with respect to the main body 1 and flows downward through the ventilation passage 15 toward the warm air heater 16. .. That is, the flow of air flowing into the suction port 14 and the flow of air passing through the warm air heater 16 are in different directions, and the air flow is bent in the ventilation passage 15. In the figure, the air flow inside the bent portion is shown by A1, and the air flow outside is shown by A2. At the bent portion, the peeling resistance is larger toward the inner side, and the flow velocity of the inner air flow A1 becomes slower and the flow velocity of the outer air flow A2 becomes faster due to the influence of this peeling resistance. That is, the air velocity is not uniform due to the change in the air flow direction in the ventilation path 15, and the difference in the velocity causes a change in the ventilation amount passing through the warm air heater 16, and the ventilation amount is A1 <A2. Become.

The hot air heater 16 has a heating wire dense portion 34 as described above. Then, as shown in FIG. 7, the heating wire dense portion 34 is arranged in the main body 1 so as to be on the back side of the main body with respect to the suction port 14. In the figure, when the hot air heater 16 is divided into two by a plane F1 parallel to the suction port 14, the region near the suction port 14 (on the right side of the plane F1 on the paper surface) is S1, and the region far from the suction port 14 (paper surface). The left side of the plane F1) is S2, but the “back side of the main body 1 with respect to the suction port 14” refers to the region S2 far from the suction port 14.

In the ventilation passage 15 of the humidifying device in the present embodiment, since the region S2 on the back side of the main body 1 with respect to the suction port 14 is outside the bent portion of the air flow, the air flow velocity is faster than the inside. , The amount of ventilation increases. Therefore, by arranging the heating wire dense portion 34 on the back side of the main body 1 with respect to the suction port 14, it is possible to prevent the amount of ventilation passing through the heating wire dense portion 34 from decreasing, and the heater temperature rises locally. By suppressing the above, safe and stable humidification can be performed.

By the way, also in the region S2, since the amount of ventilation is small near the end surface 15a (the surface on the inner side of the main body 1) of the ventilation path 15, if the heating wire 30 gets too close to the end surface 15a, the amount of ventilation of the heating wire dense portion 34 decreases. Therefore, the temperature around the heating wire densely packed portion 34 may rise. In order to prevent this, the heating wire 30 and the end face 15a can be arranged at a certain distance, and in the present embodiment, a gap 15b is provided between the heater frame 33 and the end face 15a. Has been done.

Further, the heating wire dense portion 34 can be arranged on the side surface side of the main body case 2 facing the air passage regulating member (partition plate 17) with the ventilation passage 15 interposed therebetween. In FIG. 7, when the hot air heater 16 is divided into two on the plane F2 orthogonal to the suction port 14, the region close to the partition plate 17 (the lower side of the plane F2 on the paper surface) is R1 and the region far from the partition plate 17. (Upper side of the plane F2 on the paper surface) is R2, but "the side surface side of the main body case 2 facing the air passage regulating member with the ventilation passage 15 across the air passage 15" refers to a region R2 far from the partition plate 17.

If the water tank portion 8 is correctly mounted on the main body 1, the partition plate 17 comes into contact with the inner member 2a in the main body case 2, passes through the hot air heater 16 and the vaporization filter 10 from the suction port 14 to the air outlet 3. A ventilation path 15 is formed. However, if the operation is started with the water tank portion 8 incompletely attached, a gap is generated between the partition plate 17 and the main body case 2. The incomplete state here means that the reed switch (not shown) detects the float 20, so that the operation can be performed, but the water tank portion 8 is slightly bent and inserted, or the water tank is inserted. This refers to a state in which a gap is formed between the main body case 2 and the partition plate 17 because foreign matter or the like is caught between the portion 8 and the main body case 2.

When air flows into the ventilation passage 15 from this gap, the amount of ventilation passing through the hot air heater 16 decreases, and the temperature of the hot air heater 16 may rise due to the decrease in the amount of ventilation. On the other hand, by arranging the heating wire dense portion 34 at a position away from the partition plate 17 (air passage regulating member), the heating wire dense portion 34 is less likely to be affected by the change in the air volume due to the air flowing through the gap. The rise in heater temperature can be suppressed more effectively.

In addition to the above reasons, the suction port 14 is blocked by a curtain or the like, or the vaporization filter 10 is clogged, so that the amount of ventilation is reduced or the amount of ventilation varies. When the amount of ventilation decreases, the temperature inside the main body 1 and especially around the warm air heater 16 becomes high, which may cause deformation and discoloration of the main body case 2 and the vaporization filter 10, so that the humidifier heater 16 is used as a humidifier. A safety device is provided to detect the abnormally high temperature of. In the present embodiment, the safety device (thermostat 22 and thermal fuse 23) is provided so as to face the heating wire dense portion 34. Since the temperature of the heating wire dense portion 34 tends to be higher than that of other portions, by providing a safety device facing this portion, it is possible to quickly detect an abnormality when the ventilation volume decreases for some reason. It will be excellent in safety.

Although the present invention has been described in detail above, the present invention is not limited to the above-described embodiment, and various modifications, improvements, and the like can be made without departing from the gist of the present invention. For example, the humidifying device of this embodiment is provided with one heater for warm air in the ventilation passage, but may be configured to be provided with a plurality of heaters for hot air, and further, a plurality of ventilation passages are provided in each ventilation passage. It can also be configured to include a heater for hot air. When a plurality of hot air heaters are provided, at least one of them may have the above structure.

1 Main body 2 Main body case 3 Air outlet 8 Water tank part 10 Vaporization filter 13 Blower 14 Suction port 15 Ventilation passage 16 Hot air heater 17 Partition plate (air passage regulation member)
18 Vaporizing filter housing 19 Water tank housing 22 Thermostat (safety device)
23 Temperature fuse (safety device)
30 Heating wire 31 Heater case 34 Heating wire dense part

Claims (5)

A water tank that is detachably attached to the main body and can store a certain amount of water from the water tank,
A blower that blows air into the ventilation path from the suction port to the air outlet,
A warm air heater provided on the upstream side of the blower to heat the air taken in from the suction port, and
A vaporization filter installed in the ventilation passage by immersing the lower part in the water of the water tank portion is provided.
The ventilation path has a direction in which the flow of air flowing into the suction port and the flow of air passing through the hot air heater are different.
The inner side of the main body with respect to the suction port is the outside of the portion where the air flow bends.
The hot air heater has a heating wire dense portion where the density of the heating wire is higher than that of other portions.
A humidifying device characterized in that the heating wire dense portion is arranged on the back side of the main body with respect to the suction port. Equipped with a main body case that constitutes the exterior of the main body
The water tank portion includes an air passage defining member that comes into contact with the inside of the main body case and defines the ventilation passage.
The humidifying device according to claim 1, wherein the heating wire dense portion is arranged on a side surface side of the main body case facing the air passage regulating member with the ventilation passage interposed therebetween. The humidification according to claim 2, wherein the air passage regulating member is a partition plate for partitioning a vaporization filter accommodating portion in which the vaporization filter is installed and a water supply tank accommodating portion in which the water supply tank is mounted. apparatus. The humidifying device according to any one of claims 1 to 3, wherein a safety device for detecting an abnormally high temperature of the hot air heater is provided so as to face the heating wire dense portion. The humidifying device according to any one of claims 1 to 4, wherein the warm air heater includes a coiled heating wire and a heater case that holds the heating wire in a wound state.

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