JPS63251738A - Distillation type steam humidifying device - Google Patents

Abstract

PURPOSE:To prevent adhesion of a chemical impurity due to coagulation and to maintain the exchange efficiency of heat at an excellent state for a long time, by a method wherein, to feed vaporization water to a vaporization heater, after water is distilled and purified in a distilling tank, the distilled water is fed to the vaporization heater. CONSTITUTION:A vaporization heater 3 and a distillation heater 14 are heated to a given temperature by means of a PTC heat generating element. Water 15 in a distillation tank 13 is heated by the distillation heater 14 to produce steam, which riser. The steam is liquefied in a water feed pipe 41 to produce waterdrops, which are dropped on the surface of the vaporization heater 3. In this case, when the water 15 adheres on the surface of the vaporization heater 3, it deprives heat from the surface of the vaporization heater 3, and is boiled and instantaneously gasified to generate steam, which is emitted in the air. During a distillating process, impurities in the water 15 are coagulated and adhered to the surface of the distillation heater 14. A adhered substance is simply removed by removing a flange 14a of the distillation heater 14 from the distillation tank 13. This constitution performs heat exchange on the surface of the vaporization heater 3 in a normally ideal state.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention primarily relates to an improvement in an apparatus for humidifying indoor air using distilled steam.

The prior art patent applicant has already proposed using a PTC heating element heater to supply a fixed amount of water for evaporation to the surface of the heater, instantly vaporizing the water using the heat of the heater, and humidifying indoor air. are doing. In this evaporation process, if the water for evaporation is tap water or water that contains impurities,
Since impurities adhere to the surface of the heater, heat exchange becomes poor.

On the other hand, most of these physical impurities in water can be removed by using a physical filter. However, the solutes in the water, such as chlorine used to disinfect tap water,
Because it cannot be removed by the above physical filter,
It will still solidify on the surface of the heater.

Purpose of the Invention Therefore, the purpose of the present invention is to prevent chemical impurities from adhering to the evaporation heater due to solidification, and to maintain heat exchange efficiency in a good state over a long period of time. .

SUMMARY OF THE INVENTION Therefore, in the present invention, when water for evaporation is supplied to the evaporation heater, the water is distilled and purified inside a distillation tank, and then the water is supplied to the evaporation heater. Inside this distillation tank, water is heated and vaporized by a distillation heater, and the distillation heater, like the evaporation heater,
It is composed of a TC heating element and is detachably attached to the distillation tank from the outside. Therefore, impurities can be removed from the distillation heater simply by Vf1.

The PTC heating element has a positive resistance-temperature characteristic, and when the temperature becomes high due to self-heating, the resistance value increases in proportion to this.

For this reason, the surface of the heater maintains the temperature necessary for vaporizing water in a self-controlled state, and maintains the target temperature without the need for temperature adjustment means unlike conventional nichrome wire heating elements. Water for evaporation is supplied in fixed amounts to the surface of the evaporative heater in the form of water droplets or in the form of mist, and when it adheres to the surface, it absorbs the heat from the surface of the evaporative heater and instantly turns into steam. , dispersed into the air. As a result, according to the steam humidification of the present invention, the indoor air is continuously humidified by the heated mist, that is, the steam.

Embodiment 1 FIG. 1 shows the basic steam humidifier construction of the present invention.

This steam humidifying device 1 includes, for example, a plate-shaped evaporative heater 3 in a horizontal direction and inclined as required inside an open-type evaporating tank 2, and on the upper side of the evaporative heater 3,
As the water supply means 4, a water supply pipe 41 is provided. That is, the evaporator tank 2 is of the top-opening type, and the evaporator heater 3 is supported inside thereof in a horizontal or slightly inclined state by a support 5 or the like. It also forms a drainage lower at the bottom.

The evaporative heater 3 has a PTC heating element inside, and its outer surface is completely covered with a corrosion-resistant metal such as a stainless steel plate having good thermal conductivity. , for example, is connected to a commercial power source 8.

Further, the water supply pipe 41 of the water supply means is mounted horizontally on the upper surface of the evaporative heater 3 and is supported with respect to the evaporation tank 2 by means of a fitting 9, so that water droplets can drip from the plurality of water supply holes. It is connected to a pressure water source 12 such as tap water via a distillation tank 13, a flow rate adjustment valve IO, and a filter 11.

The distillation tank 13 is hermetically sealed, and is connected to a flow rate adjustment valve lO at the water intake, and is connected to a water supply pipe 41 at the upper steam outlet, and internally operates the distillation heater 14. It is stored.

This distillation heater 14, like the evaporation heater 3,
It is composed of a TC heating element, and has a flange 14a.
It is detachably attached to the distillation tank 13 at the section . Note that the flow rate adjustment valve IO is connected to the level sensor 1.
The on/off operation is performed by the signal from 0a, and the distillation tank 13
The water level of water 15 for distillation is always kept constant inside. This water level is set at a position slightly higher than the surface of the distillation heater 14 so that the evaporation surface can easily receive heat from the surface of the distillation heater 14 intensively.

During the humidification operation, the evaporation heater 3 and the distillation heater 14 are connected to the power supply 8, and the current of the PTC heating element causes the evaporation heater 3 and distillation heater 14 to
It is heated to a predetermined temperature, for example, about 150 degrees. Note that when the PTC heating element is heated to a target temperature, that is, one Curie point or higher, the internal resistance value rapidly increases and acts in the direction of limiting the current. As a result, the evaporation heater 3 and the distillation heater 14 will not become abnormally overheated even if heat is not taken from the outside, and will self-control the target temperature. In this state, if the air blower 6 is sending air toward the surface of the evaporative heater 3, the air will come into contact with the surface of the evaporative heater 3, take away its heat, and in the heated state will blow the warm air outside. It can also be used for the purpose of simply heating the room.

On the other hand, water 15 for evaporation is supplied from a pressure water source 12,
The water is physically filtered by the filter 11, and is supplied to the inside of the distillation tank 13 while being restricted by the flow rate adjustment valve 10, where it accumulates. Here, the water 15 in the upper layer is transferred to the distillation heater 14.
It is heated intensively in the water supply pipe 41 and rises as steam.
The water liquefies again while being cooled inside the water supply pipe 41 and falls to the surface of the evaporative heater 3 in the form of water droplets from the holes in the water supply pipe 41 . At this time, when the falling droplet-shaped water 15 adheres to the surface of the evaporative heater 3, it absorbs heat from the surface of the evaporative heater 3, quickly reaches 100 ('C) or more, boils, and instantly vaporizes.
It is released into the air as steam and is supplied to the indoor air along with warm air. In this evaporation process, the one-shot heater 3 is designed to supply a sufficient amount of heat necessary for evaporating the droplet-shaped water 15 near the position where it contacts the water 15.

Therefore, the water 15 becomes completely vaporized almost instantly on the surface of the evaporative heater 3 without moving. The time required for complete vaporization can be further shortened by tilting the evaporative heater 3 slightly instead of keeping it in a horizontal position. That is, when the evaporative heater 3 is tilted, the falling water 15 moves in the inclined direction on the surface of the evaporative heater 3 while receiving and taking heat from the new surface of the evaporative heater 3. A large amount of heat is received due to the large contact area with the surface. Note that it is better if the water 15 is preheated using the heat of the evaporation heater 3 or another heat source.

Even when the maximum flow rate is set, all of the droplet-shaped water 15 completely evaporates on the surface of the evaporator 3 and becomes steam, so no water 15 accumulates inside the evaporator 2. However, when water 15 accumulates at the bottom of the tank, it is discharged from the drainage lower as necessary.

On the other hand, during the distillation process, impurities in the water 15, such as sterilizing chlorine, coagulate and adhere to the surface of the distiller 14.

These deposits impair heat exchange and should be removed at an appropriate time.

This deposit is removed from the flange 14a of the distillation heater 14.
This can be easily done by removing the distillation tank 13 from the distillation tank 13.

In this way, during the distillation process, water-soluble impurities are removed from the distillation tank 13.
remains inside and is removed from the water 15 for evaporation,
No deposits are generated on the surface of the evaporative heater 3. Therefore, heat exchange on the surface of the evaporative heater 3 is always performed under the most ideal conditions. Therefore, the evaporative heater 3 does not require replacement or cleaning even after long-term use.

Embodiment 2 FIG. 2 shows another embodiment of the steam humidifying device 1 of the present invention.

The steam humidifying device 1 of this embodiment is equipped with a plurality of evaporative heaters 3 in the vertical direction, and is configured in a lattice shape or a honeycomb shape to increase the surface area. A water supply nozzle 42 is provided at the shaped neck. This water supply nozzle 42 is connected to the throttle valve 1 in order to atomize the water 15 and spray it onto the surface of the heated evaporative heater 3.
6 to a source of pressurized air 17 and, on the water inlet side, to a container 19. The throttle valve 16 is controlled by a humidity controller 18, and automatically adjusts the amount of water 15 sprayed by restricting the flow rate of the pressurized air. Further, the water 15 is supplied to the surface of the distillation heater 14 as water droplets or as a mist.

In this embodiment, the water 15 is attached to the surface of the evaporative heater 3 in the form of atomized particle light or as little heat of vaporization as possible, so that the time required for vaporization can be further shortened. In addition, since a plurality of evaporation heaters 3 are provided,
The heat generation efficiency is also better than that of Example 1.

Variants of the invention The evaporation and distillation means can be implemented in suitable combinations between each embodiment 1.2.

Effect of the invention The present invention provides the following unique effects.

First of all, water for evaporation is supplied to the surface of the PTC heating element in the form of droplets or mist, and is instantaneously evaporated with a small amount of heat, so that the humidification operation is quickly performed.

Second, in the process of vaporizing water, it becomes steam at a temperature of nearly 100 ("C), and humidification and air heating are performed at the same time, so it is suitable as a humidifier for heating dry air.

Thirdly, in the process of water evaporation, impurities in the water solidify and the distillation action takes place in the tank, making it possible to humidify the air without contamination by impurities.

Fourth, a PTC heating element is used as the heat source of the heater, and even if water does not adhere to the surface of the heater, the heater itself will not become abnormally overheated, so a complicated temperature controller is required. Furthermore, there is no risk of dry firing, which makes maintenance and inspection easier, and the device itself can be provided at a lower cost.

Fifth, the water for evaporation is distilled inside the distillation tank and supplied as pure water to the surface of the heater in one shot, so impurities do not adhere to the surface of the evaporation heater and the heat is constantly maintained. Replacement and usable in good condition. In addition, impurities concentrate and accumulate inside the distillation tank or adhere to the surface of the distillation heater, but these can be easily removed or cleaned from the outside by removing the distillation heater from the distillation tank. Maintenance and management on the distillation side becomes easier.

[Brief explanation of the drawings] Figure 1 is a sectional view of the distillation steam humidifier of Example 1,
The figure is a sectional view of a distillation steam humidifier according to Example 2. 1. Distillation type steam humidifier, 2. Evaporation tank, 3. Evaporation heater (PTC heating element), 4. Water supply means, 6. Air blower, 8. Power supply, 10. Flow rate adjustment valve, 11... Filter, 12... Pressure water source, 13... Distillation tank, 14...
Distillation heater (PTC heating element), 15...Water for evaporation,
41...Water supply pipe, 42...Water supply nozzle.

Claims (3)

[Claims] (1) An evaporation heater consisting of an open type evaporation tank, a PTC heating element provided inside the evaporation tank, a water supply means for supplying a fixed amount of water for evaporation to the surface of the evaporation heater, and this water supply. A distillation type steam humidifying device characterized by comprising a distillation tank for feeding distilled water into a means, and a distillation heater made of a PTC heating element detachably installed in the distillation tank. (2) The distillation type steam humidifier according to claim 1, wherein a certain amount of water is supplied in the form of water droplets through a water supply pipe as a water supply means. (3) The distillation type steam humidifying device according to claim 1, wherein a certain amount of water is supplied in the form of mist by a water supply nozzle as a water supply means.