JPH035795Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Technical field of invention] The present invention relates to improvements in humidifiers.

[Technical background of the invention and its problems]

A humidifier atomizes water in a water tank using a vibrator or the like and blows it into the atmosphere using a blower, but a large blower, such as one with an atomization capacity of 1000 c.c./h or more, is required. Since the amount of atomization per unit time is large, humidification is performed to reduce the humidity in the room to 50%.
If this happens, the mist that cannot be vaporized will turn into water droplets and fall onto the top surface of the humidifier. The top surface of the humidifier body is equipped with operation panels such as a power switch and atomization control knob, so if water droplets accumulate in these areas, it is dangerous to cause an electric shock when operating the humidifier.

[Purpose of the invention] This invention was made based on the above circumstances.
The purpose is to provide a humidifier that can prevent water droplets from accumulating on the top surface of the humidifier body even during humidification operation.

[Summary of the idea]

This invention installs a condensation sensor near the mist outlet on the top of the humidifier body, and compares the condensation voltage signal obtained by this dew condensation sensor according to the condensation state with the set voltage signal for the dew condensation state. This humidifier outputs a switching signal to switch the blowing pressure of the blower that blows out fog to a higher level when dew condensation occurs on the upper surface.

[Example of idea]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an external view of the humidifier. Humidifier body 1
On the top surface, a spray outlet (mist spray nozzle) 3 for mist 2 having a predetermined spray angle is provided approximately in the center,
Atomization amount adjustment knob 4, power switch 5 on both sides
An operation panel 6 and a tank cover 7 are provided.

Now, P is a dew condensation sensor, which is provided near the spout 3 and whose resistance value decreases when dew condensation is detected.

Next, the internal structure will be explained with reference to FIGS. 2 and 3. In the figure, 8 is a water tank, and water 9 in this water tank 8 is supplied to a water tray 11 from a water outlet 10 provided below. Further, an atomizing cylinder 12 is connected to the lower part of the spout 3, and the other end reaches a water receiving tray 11. A baffle plate 13 is provided inside the atomization tube 12 to form an atomization chamber 14. In other words, atomization chamber 1
The electrostrictive vibrator unit 15 is placed in the water tray 11 below 4.
is provided. The atomizing tube 12 communicates with an air outlet 18 of a blower 17 via an atomizing duct 16. 19 is a nozzle cover.

FIG. 4 is a circuit configuration diagram. A series circuit of a switching contact 21 of a relay Ry for switching the strength of the blowing pressure and the blower 17 is connected to the AC power supply 20 via the power switch 5, and a series circuit of the blower 17 is connected to the diodes D1 to D4 and the capacitor C via the transformer 22.
A full-wave rectifier circuit 23 consisting of 1 is connected. Note that the a contact point of the switching contact 21 is used for strong blowing pressure, and the b contact is used for weak blowing pressure.

24 is a comparison circuit, which is connected to the dew condensation sensor P.
A switching signal is output when dew condensation is detected by comparing the dew condensation voltage signal k obtained by the dew condensation state voltage signal s with the dew condensation state setting voltage signal s. Specifically, a dew condensation sensor P and a resistor R connected to the full-wave rectifier circuit 23
1, a resistor voltage divider circuit consisting of resistors R2 and R3 that are connected to the full-wave rectifier circuit 23 and create a set voltage signal s, and a resistor voltage divider circuit that receives the dew condensation voltage signal k at the "+" side input terminal. Set voltage signal s to "-"
A comparator CP that outputs a low level switching signal when the level of the condensation voltage signal k received at the side input terminal becomes lower than the level of the set voltage signal s.
It is composed of. The relay Ry is supplied with power and energized when the output of the comparator CP becomes a low level, and switches the switching contact 21 to the a contact.

Reference numeral 25 denotes a vibrator circuit, which includes the electrostrictive vibrator 26 and the atomization amount adjustment knob 4, and adjusts the amount of mist generated by changing the electric power applied to the electrostrictive vibrator 26. Its configuration is such that the electrostrictive vibrator 26
A resistive voltage divider circuit is connected between the collector base of the NPN transistor Q and includes an atomization amount adjustment knob 4 and a resistor R4. Note that C2 and C3 are capacitors, and L is a coil.

Next, the operation of the humidifier configured as described above will be explained.

When the power switch 5 turns on, the blower 17
At the same time, power is supplied to the comparator circuit 24 and the vibrator circuit 25, and the humidifying operation begins. That is, the water in the water tank 8 flows into the water tray 11.
Water is supplied to fill the upper surface of the vibrator unit 15, and water is atomized by the vibration of the electrostrictive vibrator 26, and the atomization tube 12 is filled with water. At this time, since the blower 17 is rotationally driven, wind pressure is applied to the atomization chamber 14, and the mist rises inside the atomization cylinder 12 and is ejected from the ejection port 3. When the humidifying operation starts, the humidity in the room is below 50%, so fog 2 is generated.
is vaporized in the atmosphere and does not form water droplets. Therefore, the resistance value of the dew condensation sensor P is large, and the level of the dew condensation voltage signal k is higher than the level of the set voltage signal s. Therefore, the output of the comparator CP becomes high level, the relay Ry is not energized, and the switching contact 21 is connected to the b contact. As a result, the spraying pressure of the mist 2 is low, resulting in a spraying state as shown in FIG.

Now, with the above humidification operation, the indoor humidity is 50%.
If the temperature exceeds that level, the ejected mist 2 will not be vaporized in the atmosphere and will turn into water droplets. Such water droplets are fog2
Since the jetting force is weak, it falls onto the top surface of the humidifier main body 1. When the dew condensation sensor P detects this water droplet, its own resistance value decreases, and the level of the dew condensation voltage signal k decreases. Then, when the level of the dew condensation voltage signal k becomes lower than the level of the set voltage signal s, a low-level signal is output from the comparator CP. Thus, the relay Ry is supplied with power and energized, and the switching contact 21 is switched from the a contact to the a contact. As a result, the blower 17 is driven in a strong state, so the blowing pressure becomes strong and the mist 2 is ejected with the ejection force as shown in FIG. As a result, the mist 2 is ejected far away, and unvaporized water droplets do not fall on the upper surface of the humidifier body 1. Note that since the jetting force is increased, the mist 2 is more likely to be vaporized.
When the water droplets evaporate and the top surface of the humidifier body 1 becomes dry, the resistance value of the dew condensation sensor P increases, a high level signal is output from the comparator CP, and the blower 17 returns to a low blowing pressure. Drive with.

In this embodiment, the dew condensation sensor P is provided on the top surface of the humidifier main body 1, and the dew condensation voltage signal k obtained by the change in the resistance value of the dew condensation sensor P is
When the level of the voltage signal s becomes lower than the level of the set voltage signal s, the driving force of the blower 17 is changed to increase the spraying force of the mist 2, so that when water droplets fall on the top surface of the humidifier body 1, they are immediately removed. can be detected to prevent water droplets from falling. Therefore, even if the humidifying operation is continued without all of the mist 2 being vaporized, the upper surface of the main body 1, particularly the operation panel 6, will not be filled with water droplets, and there will be no electric shock during operation.

Note that the present invention is not limited to the above embodiment. In the above embodiment, there is one dew condensation sensor P, but it may be provided at a plurality of locations in consideration of the direction of mist ejection, etc. In this case, if the spout is of a rotating type, the effect will be greater and the detection area of dew condensation will also be larger.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide a humidifier that can prevent water droplets from accumulating on the upper surface of the humidifier body even during humidification operation.

[Brief explanation of drawings]

FIG. 1 is an external view showing an embodiment of the humidifier according to the present invention, FIGS. 2 and 3 are structural diagrams for explaining the operation of the humidifier shown in FIG. FIG. 2 is a circuit configuration diagram of the humidifier shown in the figure. 1... Humidifier body, 3... Spout, 4... Atomization amount adjustment knob, 6... Operation panel, 8... Water tank, 11... Water saucer, 12... Atomization tube, 14...
Atomization chamber, 15... Vibrator unit, 17... Blower, 21... Switching contact, 24... Comparison circuit, 25
... Vibrator circuit, P ... Condensation sensor, Ry ... Relay.

Claims (1)

[Scope of utility model registration request] In a humidifier that atomizes water in a water tank using an atomization mechanism and sprays the atomized water into the atmosphere using an air blower, a dew condensation sensor is installed near the mist outlet at the top of the humidifier body, and the dew condensation sensor A comparison circuit that compares a dew condensation voltage signal corresponding to a condensation state with a set voltage signal for the dew condensation state and outputs a switching signal when dew condensation occurs on the top surface of the humidifier body, and receives a switching signal from the comparison circuit. A humidifier comprising: a blower switching circuit that switches the blower pressure of the blower to a higher level.