JP3885507B2 - Method and apparatus for drying total heat exchanger as a laminated structure and total heat exchanger - Google Patents

Description

[0001]
[Industrial application fields]
The present invention, the sensible heat and latent heat exchange, to dry燥方method及beauty Drying apparatus and total heat exchanger in the production of the total heat exchanger is a layered structure which performs the selective transmission function for mass transfer Is.
[0002]
[Prior art]
The importance of ventilation in living spaces is becoming more and more important as heat insulation and airtightness improve for improving the air conditioning effect. As a method of ventilation without impairing the air conditioning effect, a method of exchanging heat between supply air and exhaust is effective, and if humidity (latent heat) can be exchanged simultaneously with temperature (sensible heat) The effect is significant. Conventionally, there are static total heat exchangers disclosed in, for example, Japanese Patent Publication No. 47-19990 and Japanese Patent Publication No. 54-1054.
[0003]
The conventional static total heat exchanger has a structure in which flat partition plates 20 and corrugated spacing plates 21 are alternately laminated and fixed with an adhesive as shown in FIG. Are made perpendicular to each other to form a secondary passage 22 for supplying air and a primary passage 23 for exhaust. In FIG. 4, an arrow (A) indicates the direction of supply air, and an arrow (B) indicates the direction of exhaust.
[0004]
In the total heat exchanger, heat exchange and mass exchange (gas transfer) are performed across the partition plate 20. For this reason, for example, mass transfer of CO ₂ , HCHO, NH _3, etc. is also accompanied, so that the partition plate 20 has been constituted by a porous material plate processed with a special permeable membrane having gas selective permeability. Furthermore, in order to effectively perform humidity transfer (moisture transfer), a hygroscopic chemical agent and a chemical agent for obtaining a flame retardant effect are processed. In the production of such a total heat exchanger, a plate made of a porous material having heat transfer property, which has a gas selective permeation function by processing a special chemical agent (such as a water-soluble polymer having selective permeability), is used as a primary passage. The primary passages 23 and the secondary passages of the laminated structure in which the entire structure is formed in a state in which the gaps 23 and the secondary passages 22 are alternately formed in layers by holding the gaps with the spacing plates 21 and bonding them with a liquid adhesive. The passage 22 is dried by passing hot air.
[0005]
[Problems to be solved by the invention]
In the conventional total heat exchanger made of the partition plate 20 having the selective permeation function as described above, the selective permeation performance of gas is low and high humidity (latent heat) exchange cannot be obtained. Moreover, the effect of a chemical agent for imparting flame retardancy cannot be obtained. The cause is considered that the medicine distribution of the partition plate 20 lacks uniformity. However, the drug distribution is kept uniform when the partition plate 20 is processed in the manufacturing stage. Therefore, it is considered that the drug distribution is disturbed in the drying process of the laminate.
[0006]
When the temperature and wind speed of the hot air passing through the primary passage 23 and the secondary passage 22 during the drying are variously changed, it is preferable to dry slowly over time by passing a weak wind rather than trying to dry quickly with a strong wind. It was confirmed that the selective permeation performance of the gas in the exchanger increased somewhat. However, it takes too much time and labor to dry without disturbing the drug distribution, leading to an increase in the cost of the total heat exchanger. Furthermore, the effect of the target chemical agent cannot be obtained.
[0007]
In order to solve such problems, the present invention has been made by paying attention to the fact that the dielectric itself heats up quickly in the dielectric heating method, and the problem is that the uniformity of drug distribution at low cost Is to develop a drying method for a total heat exchanger, which is a laminated structure using a dielectric heating method that can hold the heat , and to develop a drying device that can realize the drying method. The cost is to provide a total heat exchanger.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention according to claim 1 is configured so that a plate of a heat conductive porous material having a selective permeation function of a substance by a chemical treatment can be alternately layered with two air flow paths. holding the interval spacing plate bonded with a liquid adhesive, upon drying the laminated structure in which a whole is wet, feed individually and continuously to the passage of two systems of the laminated structure in which wet showered microwave by dielectric heating device in the stacked structure with the wind, to employ a means for Ru dried retains the uniformity of drug distribution plate.
[0009]
The invention of claim 2 in order to achieve the above object, the air flow blown into the passage of the two systems in the means according to claim 1, the means for the hot air and the dielectric heating apparatus is cooled before passing through the passages adopt.
[0010]
In order to achieve the above object, the invention according to claim 3 includes means for including an indicator that develops color by reacting with the drug treating substance before drying in the means according to either claim 1 or claim 2. adopt.
[0011]
In order to achieve the above object, the invention according to claim 4 is configured so that a plate of a heat conductive porous material having a selective permeation function of a substance by a chemical treatment can be alternately layered with two air flow paths. holding the interval spacing plate bonded with the liquid adhesive to, for drying device for drying the total heat exchanger is a stacked structure in which a whole is wet, the laminated structure wet the box body a holding portion for holding is provided, and aeolian individually and continuously to the passage of two systems of holding the laminated structure to the holding portion, provided with a blowing means for exhausting into the box outside, the laminated structure was kept in the box body in comprising a dielectric heating apparatus hurl microwave, employing a means for Ru dried retains the uniformity of drug distribution plate.
[0012]
In order to achieve the above object, the invention according to claim 5 employs the means according to any one of claims 1 to 3 to obtain a total heat exchanger.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The total heat exchanger 1 shown in FIG. 1 to FIG. 3 is a laminate in which a partition plate 2 having a rectangular projection plane shape is superimposed on a plurality of layers with a predetermined interval sandwiching a spacing plate 3 having a square projection plane shape. As a whole, the structure has a hexahedral shape as shown in FIG. The partition plate 2 has a structure in which a thin plate of heat-transmitting and moisture-permeable porous material serving as a base material has a selective permeation function of a substance by chemical treatment, and performs a permselective function over the entire plane of the plate. Moisture permeable plate in which a water-insoluble hydrophilic selective permeation layer is uniformly formed (the partition plate 2 is cut into a predetermined size, and the same reference numeral is used hereinafter) is there.
[0014]
The plate itself that is the base material of the partition plate 2 is a paper-based three-dimensional porous material, and is treated with a hygroscopic chemical agent, a flame retardant chemical agent, or the like in order to enhance humidity (latent heat) exchange. The water-insoluble hydrophilic permselective layer is formed by applying a chemical agent made of a polyurethane resin containing an oxyethylene group, a polyester resin containing an oxyethylene group, or the like.
[0015]
In this total heat exchanger, the partition plate 2 as described above is bonded using a liquid adhesive and a spacing plate 3 that holds a spacing obtained by processing a paper-based thin plate into a corrugated plate shape. A laminated structure in which a plurality of layers are laminated so that the directions are perpendicular to each other (the total heat exchanger 1 is obtained by cutting and subdividing this into a predetermined size, and the same reference numerals will be used hereinafter). The partition plate 2 that separates the primary passage 4 through which the exhaust stream flows and the secondary passage 5 through which the supply airflow flows has a heat transfer function and a high moisture permeability function. It fulfills a selective gas shielding function and can contribute to the formation of a comfortable air-conditioning environment with little energy loss by being incorporated in a ventilation device. That is, although the transfer of sensible heat and latent heat (H ₂ O) is allowed, it exhibits excellent selective permeation performance that prevents the transfer of substances such as CO ₂ , HCHO, NH _{3, and the} like.
[0016]
The selective permeability of the partition plate 2 depends not on the composition of the plate 2 but on the attribute of the hydrophilic selective permeation layer based on the chemical agent. This is based on the fact that the chemical agent having selective permeability is uniformly distributed and fixed on the entire surface of the plate 2, and is obtained by the drying process of the laminated structure 1 coated with the chemical agent and bonded with the liquid adhesive. It is maintained. Further, the flame retardancy is provided by the fact that the flame retardant chemical agent is maintained by the drying process of the laminated structure 1.
[0017]
The laminated structure 1 obtained by treating the plate 2 with a chemical agent and adhering it to the spacing plate 3 with a liquid adhesive is in a so-called soaked state and must be dried. This drying method greatly affects the selective transmission performance. That is, a chemical agent having selective permeability and a flame retardant chemical agent move accompanying the behavior of moisture in the drying process. In the method of drying hot air through the primary passage 4 and the secondary passage 5 in the laminated structure 1, the water behavior due to the capillary phenomenon cannot be controlled no matter how finely the conditions such as wind speed, temperature, and time are controlled. In the drying process, water is directed to the end surface of the laminated structure 1 and escapes from the end surface to the outside, and the chemical agent moves so as to be dragged by the movement of the water. In the laminated structure 1 thus dried, the chemical agent 6 is condensed at the edge portion as shown in FIG. 2, and the central part is in the form of a body without the chemical agent 6, which is configured as a total heat exchanger 1. However, the permselectivity works at a very small part, but does not work as a whole, and the permselective performance is very low. And what was obtained by the cutting | disconnection of the center part of the laminated structure 1 will be the total heat exchanger 1 which lacked selective permeability and flame retardance.
[0018]
The total heat exchanger 1 is made of a laminated structure 1 that is dried by controlling the movement of moisture. That is, the wet laminated structure 1 which is a dielectric is heated by dielectric heating and dried, and the laminated structure 1 is dried very quickly from the center by dielectric heating. There is no transfer of chemical agents. Therefore, the chemical agent having selective permeability and the flame retardant chemical agent are dried and fixed while being uniformly distributed on the plate 2.
[0019]
The laminated structure 1 is dried by dielectric heating using a drying apparatus as shown in FIG. 3 in which a blower 9 is provided in a box 8 provided with a dielectric heating device 7 using a magnetron and a waveguide for generating microwaves. It can be implemented easily. A holding unit 10 is provided in the box 8 of the drying device so as to detachably hold the wet laminated structure 1, and the primary passage 4 and the secondary passage 5 of the laminated structure 1 held by the holding unit 10 are provided. A blower facility 9 for blowing air from one direction individually and continuously and exhausting it out of the box body 8 is provided. And in the box 8, the dielectric heating apparatus 7 which bathes the held laminated structure 1 with a microwave is provided. The blower equipment 9 is for rapidly transporting water vapor generated inside the laminated structure 1 to the outside to promote drying, and it is not necessary to heat the blown air.
[0020]
Since the magnetron of the dielectric heating device 7 is accompanied by heat generation, the magnetron is disposed so as to be cooled by the airflow of the blower facility 9 before passing through the primary passage 4 or the secondary passage 5 of the laminated structure 1. With this configuration, warm air can be passed through the primary passage 4 or the secondary passage 5 of the laminated structure 1, and the heat generation of the magnetron can be involved in the drying of the laminated structure 1. Although induction heating and drying by air flow proceed quickly, it is desirable that air flow be continued for about 5 minutes after the dielectric heating device 7 is stopped and cooled. If phenolphthalein or a similar color indicator is mixed during processing of the chemical agent on the plate 2, the concentration distribution of the chemical agent after drying can be understood at a glance, so that quality control is easy and quality can be maintained. . For example, guanidine hydrochloride and lithium chloride react lightly with a phenolphthalein indicator. That is, according to the drying method and drying apparatus for the laminated structure 1, the total heat exchanger 1 having excellent gas selective permeation performance can be obtained at low cost.
[0021]
【The invention's effect】
According to the first aspect of the present invention, there is obtained a drying method for a total heat exchanger which is a laminated structure by a dielectric heating method capable of maintaining uniformity of drug distribution at low cost.
[0022]
According to the invention of claim 2, the heat generated by the dielectric heating device can be involved in the drying together with the effect according to claim 1.
[0023]
According to the invention of claim 3, since the concentration distribution of the chemical agent is understood at a glance with the effect according to claim 1 or 2, the quality control is facilitated.
[0024]
According to invention of Claim 4, it becomes a drying apparatus from which the total heat exchanger which is the low-cost laminated structure excellent in the selective permeation | transmission performance of gas is obtained.
[0025]
According to the invention of claim 5, a low-cost total heat exchanger having excellent gas selective permeation performance can be obtained .
[Brief description of the drawings]
FIG. 1 is a perspective view showing a total heat exchanger (laminated structure) according to an embodiment.
FIG. 2 is a plan view of a laminated structure showing a distribution of a chemical agent after drying by drying hot air.
FIG. 3 is a configuration diagram of a drying apparatus according to the embodiment.
FIG. 4 is a perspective view showing a conventional total heat exchanger.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Total heat exchanger (laminated structure), 2 Partition plate (plate), 3 Spacer plate, 4 Primary passage, 5 Secondary passage, 6 Chemical agent, 7 Dielectric heating device, 8 Box body, 9 Blower equipment, 10 Holding Department.

Claims (5)

A plate of heat-conductive porous material that has a selective permeation function of the substance by chemical treatment is held by a liquid adhesive by holding the interval with an interval plate so that the two air flow paths can be alternately layered. adhered, upon drying the laminated structure in which a whole is wet, by dielectric heating device in the stacked structure with aeolian individually and continuously to the passage of the two systems of the wet laminated structure showered microwave drying method of a total heat exchanger is a stacked structure Ru dried retains the uniformity of drug distribution in the plate. A drying method of a total heat exchanger is a stacked structure according to claim 1, airflow blown to the passage of the two systems is in hot air dielectric heating apparatus is cooled before passing through the passage of that A drying method of a total heat exchanger which is a certain laminated structure. A method for drying a total heat exchanger which is a laminated structure according to claim 1 or 2, wherein an indicator that develops color by reacting with the drug treatment substance before drying is included in the drug treatment substance. Of drying a total heat exchanger, which is a laminated structure. A plate of heat-conductive porous material that has a selective permeation function of the substance by chemical treatment is held by a liquid adhesive by holding the interval with an interval plate so that the two air flow paths can be alternately layered. bonded to a drying device for drying the total heat exchanger is a stacked structure in which a whole is wet, provided a holding portion for holding the laminate structure wet the box body, the holding portion and aeolian individually and continuously to the passage of the two systems of holding the laminated structure, comprising a blower means for evacuating to the box outside, dielectric heating pour microwaves to the laminated structure was kept in the box body A drying apparatus comprising an apparatus for drying while maintaining uniformity of drug distribution on the plate . The total heat exchanger obtained by the drying method of the total heat exchanger which is the laminated structure in any one of Claims 1-3 .

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