JPS608637A - Water evaporator - Google Patents

Abstract

PURPOSE:To improve the working life of evaporating element and prevent the reduction of efficiency, by arranging such that a water is caused to fall on the upper portion of element after filtered through a porous member. CONSTITUTION:An evaporating element 1 comprises a flat-plate like paper material 11 made of wood pulp having a water sucking characteristic and a rayon, a corrugated paper material 12 made of the same material and a plenty of vent holes 13 formed by laying these materials one after another, thereby presenting a generally honeycomb structure. A receiving pan 3 is provided at the upper portion of element 1, having a base 2 made of porous materials such as a filter paper and a non-woven fabric. A water supplied to this receiving pan 3 is allowed to fall on the element 1 through the base, and an air is withdrawn through one end of element 1 by means of a fan in the direction of arrow mark W1 and exhausted from other end surface through the air vent holes 13 as shown by the arrow mark W2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a humidifier, a moisture evaporator used for evaporating drain water, and the like.

Conventionally, in this type of evaporator, the lower part of the evaporating element made of a water-lifting material such as foamed urethane or felt-like glass fiber is submerged in a water tray, and water is sucked up to the element by capillary action. In this way, air is sent to the individual elements, and the air is passed through the numerous ventilation holes of the elements to evaporate the water adsorbed by the elements.

Such conventional devices have a problem in that it takes a long time until the entire element becomes wet because water is sucked up into the element by capillary action.

In addition, ions, 18R particles, etc. in the water will also rise through the material of the element together with the water. Therefore, there is a problem that it accumulates in the material and blocks the capillary tubes or forms a film on the surface of the fibers in the material of the element, resulting in a decrease in performance.

The basic structure of the present invention is to let water fall from the upper part of the element, which is completely opposite to the conventional idea of sucking up water by capillary phenomenon. The purpose of this is to eliminate the above-mentioned problems by causing water to fall on

The present invention will be explained below using specific examples. FIG. 1 shows an example of an evaporation element according to the present invention. The evaporation element 1 consists of a flat paper material 11 made of a mixed material of water-lifting wood pulp and rayon, and a corrugated paper material made of the same material. It is composed of a number of ventilation holes 13 provided by stacking materials 12 and stacking these materials alternately, and has a honeycomb shape as a whole. A saucer 3 having a bottom surface 2 made of a porous material such as filter paper or nonwoven fabric is disposed above the element 1, and water supplied into the tray 3 falls into the element 1 through the bottom surface. Air blown by the blower 10 enters from one end of the element 1 as shown by arrow W1, passes through the ventilation hole 13, and exits from the other end face as shown by arrow W2. Note that the side surface of the tray 3 is made of a material that does not allow water to pass through.

FIG. 2 shows an example of an air conditioner equipped with the moisture evaporator of the present invention. The element 1 is arranged at the rear of the condenser 5 of the air conditioner 4. Drain water 7 generated from the evaporator 6 of the air conditioner 4 flows into a water pan (not shown) disposed at the bottom of the element 1, is pumped up to the receiving tray 3 by the pump 9, and falls in contact with the upper surface of the element 1. The element 1 is configured to be wetted. Excess water flows into a walk pan disposed at the bottom of the element 1, and is pumped up again to the saucer 3 by a pump 9. Air heated by the condenser 5 flows through the element 1, and moisture evaporates, causing the exhaust port 8
more excreted.

FIG. 3 shows an example of a saucer. A stainless steel saucer side surface 31a is installed on the upper part of the saucer bottom surface 2 made of filter paper sandwiched between stainless steel flanges 31b, and at the bottom part of the element 1 is in contact with the saucer bottom surface 2, and also holds the element 1OL part. It has a stainless steel guide 32.

The center portion of the flange 31b is hollowed out only on the surface that contacts the top surface of the element 1, so that water is uniformly supplied to the top surface of the element 1.

Next, examples will be shown to demonstrate the superiority of the present invention.

Example 1. The water level is 7 due to Canadian freeness method.
Wood pulp and rayon fibers adjusted to 20 cc were prepared, mixed and dispersed using a pulper.

After dispersion, paper was made using a paper machine and dried. The obtained paper material was formed into a honeycomb-shaped evaporation element 1 as shown in FIG.

The temperature of the evaporation element obtained as above was 40℃.
, the air velocity inside the vent is 1.5 m in an atmosphere with relative humidity of 40%.
Air is blown continuously at /sec, and a stainless steel saucer whose bottom surface is made of ion-exchange fiber paper is placed on the top of the element, as shown in Figure 3, and water is continuously blown from this saucer. was supplied to the element, and the change in wet height of the element over time was measured. The results are shown in FIG.

Note that the wet height here is the distance from the upper end of the element to the position where the element is dry.

Example 2. An evaporator element was made from a paper material made in the same manner as in Example 1, and a qualitative filter paper was used for the bottom of the tray, and durability evaluation was conducted in the same manner as in Example 1. The results are shown in FIG.

Comparative Example: An evaporation element was prepared from a paper material prepared in the same manner as in Example 1, water was supplied only to the lower surface of the element, and durability evaluation was conducted in the same manner as in Example 1. The results are shown in FIG.

The dimensions of the evaporator elements used in the experiment were 320 m x 480 m x 40 m (height x 11 m x depth).

FIG. 4 shows the relationship between the durability time and the wet height of the element when continuous durability was performed. Note that the al moisture height in the comparative example refers to the suction height. In the case of the evaporator element of the comparative example, the wet height suddenly decreases after about 150 hours of durability, and the wet height drops to 30 fins after 200 hours. Example 1 is about 90
It maintains the wet height until 0 hours and then slowly deteriorates. Example 2 maintains performance for about 500 hours and then slowly degrades. In Examples 1 and 2, since the amount of water supplied was constant, the performance deteriorated after 900 hours and 500 hours, but the performance could be further maintained by increasing the amount of water supplied.

The water wicking phenomenon in paper materials is due to capillary rise.
Ions, organic substances, etc. in the water also rise through the paper material together with the water. Moisture evaporates when air is blown, but ions and organic substances in the water accumulate in the paper material, wiping out the capillaries formed between the paper materials and forming a film on the surface of the paper fibers. This may cause performance deterioration. Additionally, this phenomenon tends to occur from the top of the element, and once the performance deteriorates, it is very difficult to recover. As in the above example, if water is supplied to the paper material from above, the movement of water through the paper material is due to gravity rather than capillary rise, so there is no possibility that ions or organic matter in the water will accumulate in the paper material. performance can be maintained for a long time. Furthermore, according to the present invention,
Since water is supplied to the element through filter paper or ion-exchange fiber paper, it is possible to remove dirt, suspended matter, or ions contained in the water, and organic matter in the water can be removed by supplying water through activated carbon fiber paper. The lifespan of can be further extended.

Furthermore, since the water supply method relies on gravity, even in a tall element, the entire surface of the element leaks uniformly in a short rtJI, and the effective evaporation area can be increased.

In the present invention, the water-lifting material for the evaporation element is not limited to the above-mentioned mixture of wood pulp and rayon, but may also include nylon, acrylic, carbon fiber, activated carbon fiber, glass fiber, alumina silicate fiber, etc. alone or in combination. good.

In addition, filter paper and ion-exchange fiber paper were used for the bottom of the tray, but the receiver is not limited to these, and paper such as activated carbon miscellaneous paper, asbestos, cellulose mixed paper, cationic paper, activated carbon and ion-exchanged fiber paper, etc. Paper, nonwoven fabric, or felt using exchangeable resin.

Any porous material such as ceramic may be used, and the materials listed in 1.1 may be used alone or in combination.

Further, in FIG. 3, the side surface of the saucer is made of stainless steel, but it may be made of any other material that does not allow water to pass through, such as other metals or plastics.

As described above, according to the present invention, since water is supplied from above, impurities in the water do not accumulate in the element (therefore, the life of the evaporation element can be improved and performance deterioration can be prevented).

Furthermore, the entire element tends to get wet in a short time.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the moisture evaporator element of the present invention, Fig. 2 is a perspective view showing an example in which the element shown in Fig. 1 is used in an air conditioner, and Fig. 3 is an embodiment of the saucer. FIG. 4 is a characteristic diagram for explaining the present invention in detail. DESCRIPTION OF SYMBOLS 1... Evaporation element, 2... Bottom surface made of a porous member, 3... Receiver is a plate, 10... Air blower. Representative Patent Attorney Takashi Okabe Figure 1 3 'I? II Figure 2 Figure 3

Claims (1)

[Claims] It includes an evaporation element made of a water-pumping material and having a large number of vents, means for sending air to the vents of the element, and a porous member disposed on the top of the element, through which the porous member is arranged. A moisture evaporator characterized in that water is allowed to fall onto the top of the element.