WO2023248560A1

WO2023248560A1 - Total heat exchange element and ventilator

Info

Publication number: WO2023248560A1
Application number: PCT/JP2023/010777
Authority: WO
Inventors: 洋香濱田; 哲也井出; 透菅野; 繁青森
Original assignee: シャープ株式会社
Priority date: 2022-06-21
Filing date: 2023-03-20
Publication date: 2023-12-28

Abstract

The present invention provides: a total heat exchange element having a humidity-regulating function and making efficient heat exchange possible; and a ventilator.　This total heat exchange element includes a heat-storage base equipped with a humidity-regulating material, and is characterized in that the humidity-regulating material comprises a water-absorbing resin and a humidity-regulating component infiltrated into the water-absorbing resin and the heat-storage base comprises a latent-heat part supporting the humidity-regulating material and a sensible-heat part not supporting the humidity-regulating material, the latent-heat part and the sensible-heat part having been formed consecutively.

Description

Total heat exchange element and ventilation system

The present disclosure relates to a total heat exchange element and a ventilation device. This application claims priority to Japanese Patent Application No. 2022-099304 filed in Japan on June 21, 2022, the contents of which are incorporated herein.

Various total heat exchange elements have been disclosed in the past.

For example, Patent Document 1 discloses a ventilation system including a heat storage element that is made of a porous member and stores heat up to a predetermined temperature while absorbing heat and moisture from gas flowing into the ventilation system.

Japanese Patent Application Publication No. 2013-113463

However, since the heat storage element is composed only of porous members, latent heat exchange is insufficient. Furthermore, the humidity control function is also insufficient. Therefore, there is a need for an efficient total heat exchange element.

Therefore, in view of the above problems, the present disclosure provides a total heat exchange element and a ventilation device that have a humidity control function and can efficiently exchange heat.

In one aspect of the present disclosure, there is provided a total heat exchange element including a humidity control material in a heat storage base material, wherein the humidity control material includes a water-absorbing resin and a humidity control component impregnated in the water-absorbing resin; The heat storage base material is characterized in that a latent heat section carrying the humidity control material and a sensible heat section not carrying the humidity control material are continuously formed.

As described above, according to the present disclosure, it is possible to provide a total heat exchange element and a ventilation device that have a humidity control function and can efficiently exchange heat.

FIG. 1 is a perspective view schematically showing a total heat exchange element according to the present disclosure. FIG. 2 is a sectional view taken along line AA in FIG. FIG. 3 is a cross-sectional view schematically showing the humidity control material. FIG. 4 is a diagram schematically showing a humidity control material. FIG. 5 is a cross-sectional view of a sheet in which a humidity control material is dispersed in a binder. FIG. 6 is a cross-sectional view schematically showing the humidity control material. FIG. 7 is a diagram schematically showing how heat and moisture in the air move in the total heat exchange element according to the present disclosure. FIG. 8 is a diagram schematically showing a latent heat section under slurry impregnation, air blowing, drying, and 90% humidity. FIG. 9 is a diagram schematically showing a total heat exchange element including a latent heat section and a sensible heat section under slurry impregnation, air blowing, drying, and 90% humidity. FIG. 10 is a cross-sectional view schematically showing a total heat exchange element in which a latent heat storage material is attached to a sensible heat portion. FIG. 11 is a perspective view of the heat storage base material. FIG. 12 is a front view of the heat storage base material. FIG. 13 is a side view of the heat storage base material. FIG. 14 is a perspective view showing a modification of the heat storage base material. FIG. 15 is a front view showing a modification of the heat storage base material. FIG. 16 is a perspective view showing another modification of the heat storage base material. FIG. 17 is a front view showing another modification of the heat storage base material. FIG. 18 is a perspective view showing another modification of the heat storage base material. FIG. 19 is a perspective view showing another modification of the heat storage base material. FIG. 20 is a front view showing another modification of the heat storage base material. FIG. 21 is a side view schematically showing a ventilation device according to the present disclosure. FIG. 22 is a side view schematically showing a modification of the ventilation device according to the present disclosure.

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the drawings. Note that this embodiment described below does not unduly limit the content of the present disclosure described in the claims, and all of the configurations described in this embodiment are essential as a solution to the present disclosure. Not necessarily. In the drawings, the X-axis is the depth direction, which is the blowing direction, the Y-axis is the width direction, and the Z-axis is the height direction.

[Total heat exchange element]
FIG. 1 is a perspective view schematically showing a total heat exchange element 100 according to the present disclosure. FIG. 2 is a sectional view taken along line AA in FIG. A total heat exchange element 100 according to the present disclosure includes a humidity control material 20 on a heat storage base material 10, as shown in FIG. Further, as shown in FIGS. 1 and 2, the heat storage base material 10 has a latent heat section 11 carrying the humidity control material 20 and a sensible heat section 12 not carrying the humidity control material 20, which are continuously formed. It is characterized by Note that since the humidity control material 20 is a thin film or the like, it is not shown with a reference numeral in FIG.

The heat storage base material 10 has a humidity control function by absorbing or releasing moisture through the humidity control material 20 of the latent heat section 11 by continuously forming a latent heat section 11 and a sensible heat section 12, and has a sensible heat control function. The portion 12 performs heat exchange such as heat radiation to adjust the moisture content of the humidity control material 20 that absorbs or releases moisture. In this way, the total heat exchange element 100 according to the present disclosure has a humidity control function and can efficiently exchange heat. Moreover, it is preferable that the sensible heat section 12 is exposed. Note that the heat storage base material 10 may have a cylindrical structure, as shown in FIG. Further, the heat storage base material 10 may have a plate-like or corrugated structure. Moreover, the cross-sectional shape of the heat storage base material 10 is not limited.

Furthermore, the latent heat section 11 and the sensible heat section 12 may be arranged adjacent to each other in parallel to the air blowing direction, as shown in FIG. In this case, as shown in FIG. 1, the −X side from the boundary O is the latent heat section 11, and the +X side is the sensible heat section 12. Furthermore, the latent heat section 11 and the sensible heat section 12 may be arranged adjacent to each other perpendicularly to the air blowing direction. In FIG. 1, the latent heat section 11 and the sensible heat section 12 are shown. good. For example, the latent heat section 11, the sensible heat section 12, and the latent heat section 11 may be arranged, or the latent heat section 11, the sensible heat section 12, the latent heat section 11, and the sensible heat section 12 may be repeated continuously. The order of the latent heat section 11 and the sensible heat section 12 is not limited.

The humidity control material 20 is prepared by adding a water-absorbing resin to a humidity control solution to be described later, and stirring and swelling the mixture to create a viscous slurry of the humidity control material 20. The slurry is impregnated and coated on the heat storage base material 10, dried, and fixed to form the latent heat section 11. In this way, by impregnating and coating a portion of the heat storage base material 10 with the slurry, the latent heat portion 11 can have a desired area.

Next, the humidity control material 20 provided in the heat storage base material 10 will be explained.

FIG. 3 is a cross-sectional view schematically showing the humidity control material 20. As shown in FIG. 3, the humidity control material 20 includes a water absorbing material 21 containing a resin and/or a clay mineral, and a humidity control liquid 22, which is a humidity control component that absorbs or releases moisture and has a humidity control function. . The moisture-adjusting liquid 22 is impregnated into the water-absorbing material 21 . Depending on the humidity of the environment in which it is placed, the humidity control material 20 absorbs and absorbs moisture contained in the air, or releases moisture contained in the humidity control material 20 into the air for humidification. Note that the humidity control liquid 22 may be impregnated not only in the water absorbent material 21 but also in the carrier 23 that supports the humidity control material 20 (water absorbent material 21). The carrier 23 will be described later.

The shape of the humidity control material 20 may be powder, particulate, or block, or it may be used by supporting the resin on a ventilation base material so that it can be brought into efficient contact with air.

The water absorbing material 21 has a function of holding the humidity control liquid 22. Since the water-absorbing material 21 holds the humidity control liquid 22, it is possible to realize the humidity control material 20 having a high ratio of surface area to volume. Therefore, the rate of moisture absorption or release can be increased. Therefore, the humidity control material 20 can have a high humidity control speed.

The water absorbing material 21 is preferably a water absorbing resin (particles, powder). In this way, the water absorbing material 21 can be suitably impregnated with the humidity control liquid 22, and the humidity control effect can be further enhanced. As specific examples of the water-absorbing resin material, ionic resins and nonionic resins are preferred. Examples of the ionic resin include alkali metal salts of polyacrylic acid, starch-acrylate graft polymers, and the like. Specific examples of alkali metal salts of polyacrylic acid include sodium polyacrylate. Examples of the nonionic resin include vinyl acetate copolymer, maleic anhydride copolymer, polyvinyl alcohol, polyalkylene oxide, and the like.

The humidity control liquid 22 preferably contains at least one selected from the group consisting of a deliquescent substance that absorbs moisture in the air and deliquesces, and a polyhydric alcohol. In this way, the humidity control effect can be further enhanced.

Specific examples of polyhydric alcohols include at least one selected from the group consisting of glycerin, propanediol, butanediol, pentanediol, trimethylolpropane, butanetriol, ethylene glycol, diethylene glycol, triethylene glycol, and lactic acid. Among them, polyhydric alcohols having three or more hydroxyl groups such as glycerin are more preferably used. Note that the polyhydric alcohol may constitute a dimer or a polymer.

Deliquescent substances are classified into salts and water-soluble organic substances. Specific examples of salts include sodium formate, potassium formate, ammonium formate, sodium acetate, potassium acetate, lithium acetate, ammonium acetate, sodium lactate, potassium lactate, sodium benzoate, potassium benzoate, sodium propionate, propionic acid. Potassium, calcium chloride, lithium chloride, magnesium chloride, calcium chloride, lithium chloride, potassium chloride, sodium chloride, zinc chloride, aluminum chloride, lithium bromide, calcium bromide, potassium bromide, sodium hydroxide, sodium pyrrolidone carboxylate, Examples include potassium carbonate, calcium citrate, sodium citrate, potassium citrate, lithium citrate, and the like. Among these salts, only one type may be included, or two or more types may be included. Among these, preferred are sodium formate, potassium formate, sodium acetate, potassium acetate, and potassium carbonate, which absorb and desorb a large amount of moisture per weight. Furthermore, among these, carboxylates (sodium formate, sodium formate, Sodium acetate, sodium propionate) are preferred. Specific examples of water-soluble organic substances include sugars such as sucrose, pullulan, glucose, xylol, fructose, mannitol, and sorbitol, carboxylic acids such as citric acid, and amides such as urea.

The amount of the humidity control liquid 22 relative to the water-absorbing material 21 is preferably 1 part by weight or more and 1000 parts by weight or less based on 100 parts by weight of the water-absorbing material. In this way, the amounts of the water absorbing material 21 and the humidity control liquid 22 will be appropriate, and the humidity control function can be further enhanced. Further, the water absorbing material 21 is preferably in the form of powder or particles.

FIG. 4 is a diagram schematically showing the humidity control material 20. As shown in FIG. 4, the humidity control material 20 (water absorbing material 21) may be supported on a carrier 23. Furthermore, a humidity control component may be included between the water absorbing material 21 and the water absorbing material 21. In this way, a humidity control material 20 having a high ratio of surface area to volume can be realized, and the rate of moisture absorption or release can be increased. Further, the carrier 23 can also be impregnated with moisture.

The total heat exchange element 100 according to the present disclosure is produced by applying the above-described humidity control material 20 to the heat storage base material 10 or by immersing the heat storage base material 10 in a liquid containing the humidity control material 20. It is attached to the base material 10. In addition, as for the heat storage base material 10, although it will be mentioned later, it is preferable that a heat exchange element with a large heat storage capacity is used.

FIG. 5 is a diagram schematically showing another form of the humidity control material 20, and is a cross-sectional view of a sheet in which a binder (carrier 23) is disposed between water absorbers 24 and a humidity control material 20 is dispersed in the binder. be. As shown in FIG. 5, the humidity control material 20 (water absorbing material 21) may be supported on a carrier 23. Further, the water absorbent body 24 may include the water absorbing material 21. Furthermore, a humidity control liquid 22 may be contained between the water absorbing material 21 and the moisture absorbing material 21 . In this way, a humidity control material 20 having a high ratio of surface area to volume can be realized, and the rate of moisture absorption or release can be increased. Further, the carrier 23 can also be impregnated with moisture. A material containing a humidity control material 20 as shown in FIG. 5 may be provided in the heat exchange element (heat storage base material 10).

Furthermore, it is preferable that the carrier 23 supporting the humidity control material 20 be selected optimally depending on the application. When the total heat exchange element 100 involves the movement of heat, it is preferable to use a metal material such as aluminum or ceramics, and when a large capacity for moisture absorption and release is desired for the purpose of humidity control, it is preferable to use a humidity control element. A material that moistens and retains the liquid 22 is preferred. In the latter case, it is made of, for example, a porous material, a nonwoven fabric, a woven fabric, or other hydrophilic fiber. In particular, nonwoven fabrics with high water vapor permeability are preferred. Further, the carrier 23 can also include a binder.

The shape of the carrier 23 is a sheet, and it may be formed into various shapes such as a flat plate, pleated shape, or honeycomb shape. For example, a sheet material is first formed into a corrugated (flute) shape using a corrugator, and then fixed with an adhesive and integrated with a flat liner made of the same or different material as the sheet. be done. Furthermore, the carrier 23 may have flexibility. The carrier 23 may be deformable. In other words, it may be possible to hold it in any shape (bent shape, curved shape, etc.).

FIG. 6 is a cross-sectional view schematically showing the humidity control material 20. As shown in FIG. 6, the humidity control material 20 may be supported on a carrier 23, held on a water absorbent 24, and provided on a heat exchange element (heat storage base material 10). In this way, the area in contact with the air increases, and the humidity control function can be improved.

The water absorbing body 24 may include the water absorbing material 21. Further, the water absorbent body 24 may be in the form of powder, particles, or sheet.

In addition to the above, the humidity control material 20 may also be made of B-type silica gel, polymer sorbent, or the like.

Further, it is assumed that the humidity control component contains the above-mentioned deliquescent substance, and other components may be added as additives for adjusting the crystallization threshold humidity. Examples include deliquescent substances, polyhydric alcohols, or substances that serve as nucleating materials for hydrate crystals. Specific examples of each generating material include carboxylic acids having two or more carboxyl groups and amides having two or more amide groups. As the carboxylic acids, the substances mentioned above may be used. The crystallization threshold humidity is the threshold value at the humidity at which the humidity control material crystallizes, although there are cases where the humidity control material crystallizes when the humidity is low.

Note that "humidity control" means adjusting the relative humidity so that it approaches a predetermined humidity range. Specifically, for example, assuming that 50% RH is a predetermined relative humidity, when the relative humidity is higher than 50% RH, the humidity control material 20 absorbs moisture (moisture absorption), and when the relative humidity is higher than 50% RH. When the humidity is low, the humidity control material 20 releases moisture (releases moisture). Usually, the predetermined relative humidity range correlates with the material and moisture content of the humidity control material 20. Specifically, for example, the predetermined relative humidity range correlates with the water content in the humidity control liquid 22.

Hereinafter, the total heat exchange element 100 according to the present disclosure will be further described.

FIG. 7 is a diagram schematically showing how heat and moisture in the air move in the total heat exchange element 100 according to the present disclosure. As described above, as shown in FIG. 7, the total heat exchange element 100 includes the heat storage base material 10 and the humidity control material 20, and the heat storage base material 10 has the latent heat section 11 and the sensible heat section 12 formed continuously. ing. In the total heat exchange element 100, the humidity control material 20 absorbs moisture from the high humidity and high temperature air in the air (A), and when the humidity is absorbed, the adsorption heat, desorption heat, and heat in the air near the latent heat section 11 are absorbed. The heat (D) is transferred to the heat storage base material 10 of the latent heat section 11 (B), the heat is transferred to the sensible heat section 12 (C), and the heat in the air near the sensible heat section 12 is transferred to the sensible heat section 12. (C), and all the heat transmitted to the sensible heat section 12 is released from the sensible heat section 12 and heat exchanged. Unlike the case where the latent heat part 11 and the sensible heat part 12 are separated, the heat storage base material 10 has no thermal resistance because the latent heat part 11 and the sensible heat part 12 are formed continuously. Exchange efficiency can be improved. Therefore, the total heat exchange element 100 has a humidity control function and can efficiently exchange heat.

If the latent heat section 11 and the sensible heat section 12 are not formed continuously, a heat storage member that mainly handles sensible heat will be provided separately, so the device configuration will become larger in a ductless device. For example, it is difficult to install it inside a wall used for residential purposes to make it ductless. It is also possible to connect the latent heat exchange member and the heat storage member using a high heat transfer material, but in the case of a thin honeycomb structure element to improve the contact efficiency between the humidity control material 20 and air, the air flow can be reduced. It is difficult to connect the cross sections of the heat storage substrate without disturbing or blocking the cells.

Therefore, according to the total heat exchange element 100 according to the present disclosure, the heat storage base material 10 is provided with the humidity control material 20, and the heat storage base material 10 has the latent heat section 11 and the sensible heat section 12 continuously formed. It has a humidity control function and enables efficient heat exchange. Further, the total heat exchange element 100 according to the present disclosure can be miniaturized even in a ductless device, and can be appropriately installed inside a wall used for a residence, for example.

The total heat exchange element 100 according to the present disclosure will be described in further detail.

FIG. 8 is a diagram schematically showing the latent heat section 11 under slurry impregnation, air blowing, drying, and 90% humidity. FIG. 8 shows a heat exchange element (heat storage base material 10) that does not have a sensible heat section 12. As shown in the upper part of FIG. 8, a humidity control material 20 is provided by adhering slurry to the latent heat section 11. At this time, the moisture control material 20 absorbs moisture 25. Further, air blowing or the like is performed to dry the humidity control material 20 as shown in the middle part of FIG. Further, as shown in the lower part of FIG. 8, when the latent heat section 11 is placed under, for example, 90% humidity, the humidity control material 20 absorbs moisture 25 in the air. Then, during use, the humidity control material 20 absorbs moisture that it cannot hold, and the water is separated from the humidity control material 20 in the latent heat section 11, resulting in peeling or carryover of the humidity control material 20, resulting in dripping.

Further, as shown in the upper part of FIG. 8, a humidity control material 20 is provided by adhering slurry to the latent heat section 11. Since the humidity control material 20 has viscosity, excess slurry liquid attached thereto is removed by air blowing. As shown in the middle part of FIG. 8, the humidity control material 20 is dried and fixed to the heat storage base material 10. The lower part of FIG. 8 shows how this latent heat section 11 is placed under, for example, 90% humidity. The humidity control material 20 absorbs moisture 25 in the air. If the slurry liquid is insufficiently removed in the impregnation step, the moisture control material 20 absorbs the moisture that cannot be retained during use, and water is separated, forming water droplets in the latent heat section 11. As a result, the humidity control material 20 in the latent heat section 11 is partially peeled off or carries over, resulting in dripping.

On the other hand, FIG. 9 is a diagram schematically showing a total heat exchange element 100 including a latent heat section 11 and a sensible heat section 12 under slurry impregnation, air blowing, drying, and 90% humidity. FIG. 9 shows a heat exchange element (heat storage base material 10) including a latent heat section 11 and a sensible heat section 12. In FIG. 9, since the latent heat section 11 and the sensible heat section 12 are provided, even under 90% humidity after slurry impregnation, air blowing, and drying, the humidity control material 20 of the latent heat section 11 absorbs a large amount of moisture 25. , the moisture 25 can be released by the sensible heat section 12. Therefore, the heat exchange element (heat storage base material 10) including the latent heat part 11 and the sensible heat part 12 is different from the heat exchange element (heat storage base material 10) without the sensible heat part 12 described above. It is possible to suppress water from separating from the humidity control material 20 and causing carryover due to peeling of the humidity control material 20 or dripping.

On the other hand, in FIG. 9, since the latent heat section 11 and the sensible heat section 12 are provided, the excess slurry liquid attached is effectively removed by air blowing. Therefore, the heat exchange element (heat storage base material 10) including the latent heat part 11 and the sensible heat part 12 is different from the heat exchange element (heat storage base material 10) without the sensible heat part 12 described above. It is possible to suppress water from separating from the humidity control material 20 and causing carryover due to peeling of the humidity control material 20 or dripping.

As shown in FIG. 9, the surface of the heat storage base material 10 in the latent heat section 11 is preferably a hydrophilic treated surface 13. The hydrophilic treated surface 13 is a surface of the heat storage base material 10 (that is, a part of the heat storage base material 10) that has hydrophilic properties. Since the slurry for adhering the humidity control material 20 is a water solvent, by making the heat storage base material 10 a hydrophilic surface, the heat storage base material 10 and the humidity control material 20 can be bonded together in the latent heat section 11 without using an adhesive. can be supported, and the heat transfer efficiency of adsorption heat to the heat storage base material 10 is improved. Moreover, the production efficiency of the total heat exchange element 100 is improved. Hydrophilic treatment methods for surface treatment of the heat storage base material 10 include a method of providing a silica-based film mainly composed of water glass, a method of providing a resin-based film using a hydrophilic resin, a boehmite film, and an anodic oxide film. An example of this method is to provide a. Furthermore, it becomes easy to manufacture a latent heat section by attaching the humidity control material 20 to the heat storage base material 10.

Furthermore, in order to effectively transfer heat transferred from the air and heat generated by adsorption and desorption of moisture to the heat storage base material 10, it is preferable that the heat storage base material 10 and the humidity control material 20 are in close contact with each other.

Note that since the humidity control material 20 adsorbs and desorbs moisture in the air, it is preferable that the humidity control material 20 be exposed on the surface. In consideration of improving the efficiency of contact with air, it is better to have a larger surface area, and for this purpose, the presence of the water-absorbing resin causes unevenness, and it is advantageous to increase the surface area.

The larger the particle size of the water-absorbing resin is, the greater the amount of humidity control salt that can be impregnated into the water-absorbing resin (=the amount of moisture that can be absorbed and released), but the surface area when supported on the surface of the heat storage base material 10 is It is small and there is a trade-off relationship. The water-absorbing resin having a small particle size can be fixed to the base material without using an adhesive due to its own viscosity and fusion with the heat storage base material 10 during drying. Considering the above, the average particle size of the water absorbent resin is preferably 10 to 100 μm, more preferably 30 to 50 μm. When a water-absorbing resin having the above particle size range is selected, it is possible to simultaneously improve the sensible heat exchange efficiency by increasing the surface area and improve the latent heat exchange efficiency by increasing the heat transfer efficiency by not using a binder. Note that the average particle size is the particle size in a dry state, and the particle size of dozens of randomly selected water-absorbing resin particles is measured by image analysis, and the calculated average value is taken as the average particle size.

If the moisture-absorbing components that are not impregnated into the water-absorbing resin in the humidity control liquid slurry remain and adhere to the heat storage substrate 10 during drying, dripping due to moisture absorption at high humidity and humidity control salt crystals at low humidity may occur. There is a risk that the rate of moisture absorption may decrease due to oxidation. For this purpose, it is preferable that the humidity control component that is not impregnated with the water absorbent resin in the slurry is removed from the base material, and the water absorbent resin impregnated with the humidity control component is attached. An effective removal method is to blow away the excess slurry with air blowing, but in that case, if the heat storage base material 10 has a hydrophobic part, the excess slurry and humidity conditioning liquid will be removed due to the difference in affinity of the surface condition. Cheap.

As shown in FIGS. 9 and 10, the surface of the heat storage substrate 10 in the sensible heat section 12 is preferably a water-repellent treated surface 14. The water-repellent treated surface 14 is a surface of the heat storage base material 10 (that is, a part of the heat storage base material 10) that has water repellency. In this way, draining of the excess slurry is promoted in the sensible heat section 12 which is the water-repellent treated surface 14, thereby making it easier to control the amount of humidity control components carried in the humidity control material 20, and making the heat storage base material By reducing the amount of moisture conditioning components that are not impregnated into the water-absorbing resin coating No. 10, it is possible to suppress carryover due to dripping due to moisture absorption at high humidity and a decrease in moisture absorption rate due to moisture conditioning salt crystallization at low humidity. This improves latent heat exchange efficiency. As the water-repellent treated surface 14, paraffins may be applied. Paraffins include linear and branched paraffins, with linear n-paraffins being preferred. Examples of n-paraffins include n-pentadecane, n-hexadecane, n-heptadecane, n-octadecane, and n-nonadecane.

Furthermore, as shown in FIG. 10, it is preferable that the sensible heat section 12 has a latent heat storage material 15 attached thereto. In this way, the heat storage capacity increases and the sensible heat exchange efficiency of the sensible heat section 12 improves. Further, it becomes possible to utilize the hydrophobic latent heat storage material 15, and heat transfer is improved because heat is transferred on the same heat storage base material 10. Furthermore, due to the difference in water affinity between the sensible heat section 12 and the latent heat section 11, the adhesion of the humidity control material 20 and the latent heat storage material 15 can be controlled independently, and the production efficiency of the total heat exchange element 100 is improved.

The latent heat storage material 15 is a material that stores latent heat exchanged with the outside during phase change or transition of a substance as thermal energy. The heat of fusion and heat of solidification at their melting points are utilized. These materials undergo a phase change between solid and liquid. Since the latent heat storage material 15 stores heat at a phase change temperature, it is possible to store heat in a boundary region (it is possible to store heat at a constant temperature). This is due to the phenomenon that as long as the two layers of solid and liquid coexist during phase change, heat continues to be taken from the outside, and the temperature no longer rises above the melting point.

The melting point of the latent heat storage material 15 is 10 to 35°C, preferably 20 to 35°C. Within this range, the total heat exchange element 100 can effectively store heat when exchanging heat between indoor air and outdoor air, for example. Further, it is preferable that the latent heat storage material 15 has a phase transition temperature of 25 to 35°C.

In addition, the latent heat storage material 15 includes fatty acids such as palmitic acid and myristic acid, aromatic hydrocarbon compounds such as benzene and p-xylene, aliphatic hydrocarbons, hydrates, isopropyl palmitate, butyl stearate, and stearin. Examples include ester compounds such as stearyl acid and myristyl myristate, alcohols such as stearyl alcohol and glycerol, d-lactic acid, acetic acid, capric acid, and ethylenediamine. Examples of aliphatic hydrocarbons include paraffins. Paraffins include linear and branched paraffins, with linear n-paraffins being preferred. Examples of n-paraffins include n-pentadecane, n-hexadecane, n-heptadecane, n-octadecane, and n-nonadecane. Hydrates include Zn(NO ₃ ) _2.6H ₂ 0, NaHPO 4.12H ₂ 0, Na ₂ CO _3.10H ₂ 0, Na ₂ SO 4.10H ₂ 0, Li ₂ NO _3.3H ₂ ₀ _. , Ca ₂ Cl ₂ .6H ₂ 0, Ca ₂ CO ₃ .10H ₂ 0, FeBr ₃ .6H ₂ 0, and the like. These latent heat storage components may be used alone or in combination of two or more. It is preferable to use chemically and physically stable and inexpensive substances.

Since paraffins such as n-paraffin are hydrophobic and do not mix with water, it is difficult to support them on the heat storage base material 10 together with the latent heat storage material 15 of the humidity control material 20 that exchanges moisture. However, by providing the water-repellent treated surface 14 on the heat storage base material 10 surface, or by attaching the latent heat storage material 15 to the sensible heat section 12, the latent heat storage material 15 can be carried by the hydrophobic sensible heat exchange section. Since it becomes possible to independently control and support the compatible humidity control material 20 and the hydrophobic latent heat storage material 15, the production efficiency of the total heat exchange element 100 is improved. Further, due to the difference in the surface water affinity of the heat storage base material 10, it is possible to optimize the support of the humidity control material 20 and support the latent heat storage material 15 at the same time. Further, if paraffins are formed on the heat storage base material 10, they can be used as the water-repellent treated surface 14, and can also be used as the latent heat storage material 15 at the same time.

Furthermore, when using a hydrated salt as the latent heat storage material 15, there was a possibility that it would be affected by the exchange of moisture in the humidity control component, but the humidity control material 20 and the latent heat storage material 15 would not mix. In addition, by exchanging total heat while continuously existing on the heat storage base material 10, each control becomes possible.

It is also possible to have the latent heat storage material 15 supported in the sensible heat section 12 as a temperature regulating substance in which the latent heat storage material 15 is held in a gel-like resin. Since it undergoes a phase change in a gel-like state, its fluidity is improved and it becomes possible to retain more heat storage capacity. Further, it is also possible to have the latent heat storage material 15 supported in the sensible heat section 12 as a temperature regulating substance in which the latent heat storage material 15 is encapsulated in microcapsules. As a result, a phase change occurs within the microcapsules, improving fluidity and making it possible to retain more heat storage capacity.

The heat storage base material 10 will be explained in detail below.

FIG. 11 is a perspective view of the heat storage base material 10. FIG. 12 is a front view of the heat storage base material 10. FIG. 13 is a side view of the heat storage base material 10. The air blowing direction in the figure is from A to B (from -X to +X direction) or from B to A (from +X to -X direction). The heat storage base material 10 shown in FIGS. 11, 12, and 13 has a corrugated structure formed by combining a corrugated plate and a flat plate. The corrugated structure can increase the surface area of the heat storage base material 10. The heat storage base material 10 has a first opening 17a provided on the A side and a second opening 17b provided on the B side. An air passage 16 is provided in the heat storage base material 10 so that air is blown from the first opening 17a and exits to the second opening 17b.

Furthermore, as shown in FIGS. 11, 12, and 13, the heat storage base material 10 is layered in order to provide a plurality of air passages 16. Moreover, the air passage 16 is linear in order to facilitate heat exchange with the heat storage base material 10. The heat storage base material 10 is made of ceramics, metal, paper/fiber, or the like and has a porous shape to increase the surface area and improve the heat exchange efficiency. Note that the heat exchange element is made of a metal with high thermal conductivity, such as aluminum, iron, or copper. Since the heat exchange element is made of the above-mentioned metal, it has a large heat storage capacity. Further, the latent heat portion 11 and the sensible heat portion 12 of the heat storage base material 10 may be made of the same material or may be made of different materials. The heat storage base material 10 described above and the heat storage base material 10 described below are also made of the same material.

The heat storage base material 10 is divided at a boundary O1, with a latent heat part 11 on the K side and a sensible heat part 12 on the L side, and the latent heat part 11 and the sensible heat part 12 are arranged adjacently in parallel to the air blowing direction. Good too. In this case, the air is blown to the latent heat section 11 and the sensible heat section 12 in this order. In this way, the process of supporting the humidity control material 20 on the heat storage base material 10, attaching the latent heat storage material 15, and forming the water-repellent treated surface 14 of the heat storage base material 10 can be simplified. Further, even if the material of the heat storage base material 10 is made by forming the raw sheet of the heat storage base material 10 into elements, the above-mentioned post attachment is easy. The arrangement of the latent heat section 11 and the sensible heat section 12 may be reversed to the above. In addition, the heat storage base material 10 is divided at the boundary O2, with the M side as the latent heat part 11 and the N side as the sensible heat part 12, and the latent heat part 11 and the sensible heat part 12 are arranged adjacent to each other perpendicularly to the air blowing direction. You may. In this case, both the latent heat section 11 and the sensible heat section 12 are blown at the same time. The arrangement of the latent heat section 11 and the sensible heat section 12 may be reversed to the above.

FIG. 14 is a perspective view showing a modification of the heat storage base material 10. FIG. 15 is a front view showing a modification of the heat storage base material 10. As shown in FIGS. 14 and 15, the heat storage base material 10 may have a honeycomb structure.

FIG. 16 is a perspective view showing another modification of the heat storage base material 10. FIG. 17 is a front view showing another modification of the heat storage base material 10. As shown in FIGS. 16 and 17, two heat storage substrates 10' and 10'' may be used and each may be stacked in the X direction. Further, as shown in FIG. 17, an offset structure may be used in which the overlapping position in the X direction is shifted in the Z direction or the Y direction. In the above offset structure, as shown in FIG. 17, the opening 17'a of the heat storage base material 10' placed at the front is offset from the opening 17''a of the heat storage base material 10'' placed at the back. .

FIG. 18 is a perspective view showing another modification of the heat storage base material 10. The heat storage base material 10 shown in FIG. 18 has a structure in which several protrusions (pin fins) are provided on one plate, and has a pin structure. The heat storage base material 10 is divided at a boundary O1, with a latent heat part 11 on the K side and a sensible heat part 12 on the L side, and the latent heat part 11 and the sensible heat part 12 are arranged adjacently in parallel to the air blowing direction. Good too.

FIG. 19 is a perspective view showing another modification of the heat storage base material 10. The heat storage base material 10 shown in FIG. 19 has a structure in which several plates are provided perpendicularly to one plate, and has a fin structure. The heat storage base material 10 is divided at a boundary O1, with a latent heat part 11 on the K side and a sensible heat part 12 on the L side, and the latent heat part 11 and the sensible heat part 12 are arranged adjacently in parallel to the air blowing direction. Good too. In addition, a pleated structure may be used.

FIG. 20 is a front view showing another modification of the heat storage base material 10. As shown in FIG. 20, a corrugated latent heat section 11 and a flat sensible heat section 12 may be stacked and rolled to form a structure. In such a structure, the surface areas of the latent heat section 11 provided with the humidity control material 20 and the sensible heat section 12 not provided with the humidity control material 20 are increased, and heat exchange becomes possible more efficiently.

As described above, the total heat exchange element 100 according to the present disclosure has a humidity control function and can efficiently exchange heat.

[Ventilation system]
FIG. 21 is a side view schematically showing a ventilation device 200 according to the present disclosure. As shown in FIG. 21, a ventilation device 200 according to the present disclosure includes a total heat exchange element 100. Further, the ventilation device 200 may include a blower fan that blows air through the total heat exchange element 100, and a pipe 50 that accommodates the total heat exchange element 100 and the blower fan.

As the ventilation fan, one first fan 30 may be provided as shown in FIG. 21. The first fan 30 blows air through the total heat exchange element 100 from A to B. As shown in FIG. 21, the air blown by the first fan 30 enters through the first opening 17a of the total heat exchange element 100 on the side of the first fan 30, passes through the air passage 16, and passes through the total heat exchange element 100. through the second opening 17b.

In this way, it has a humidity control function and can efficiently exchange heat. Moreover, it is possible to prevent unevenness in wind speed and to enable efficient heat exchange.

The axis P1 of the first fan 30 is preferably parallel to the air passage 16 that blows air inside the total heat exchange element 100. That is, the air blowing path 16 is parallel to the air blowing direction of the first fan 30. Further, the center of the total heat exchange element 100 is arranged on the axis P1 of the first fan 30.

Further, as shown in FIG. 22, the ventilation device 200 according to the present disclosure is arranged so as to sandwich one side A and the other B of the air blowing direction to the total heat exchange element 100, and blows air inside the total heat exchange element 100. A first fan 30 and a second fan 40 may be included. As shown in FIG. 22, by the first fan 30 and the second fan 40, the blown air enters from the first opening 17a of the heat storage base material 10 on the side of the first fan 30, passes through the air passage 16, It passes through to the second opening 17b of the heat storage base material 10 on the second fan 40 side. The first fan 30 and the second fan 40 blow in the same direction.

In this way, it has a humidity control function, can further prevent uneven wind speed, and can efficiently exchange heat.

Furthermore, it is preferable that the axis P1 of the first fan 30 and the axis P2 of the second fan 40 be parallel to the air passage 16 that blows air inside the total heat exchange element 100. In other words, the air blowing directions of the first fan 30 and the second fan 40 are parallel to the air blowing path 16 . Further, the center of the total heat exchange element 100 is arranged on the axis P1 of the first fan 30 and the axis P2 of the second fan 40.

As the first fan 30 and the second fan 40, an axial fan or a blower fan equipped with a propeller is used.

Furthermore, the first fan 30 and the second fan 40 may have different rotational directions and fan angles, but may blow air in the same direction. In other words, the first fan 30 rotates clockwise, the second fan 40 rotates counterclockwise, and the angles of the first fan 30 and the second fan 40 are opposite. , the air is blown in the same direction. By doing so, it is possible to further improve the unevenness of wind speed in the central part of the heat storage base material 10 and the outside thereof, which will be described later. Moreover, dew condensation due to excessive moisture absorption of the humidity control material 20 can be further prevented.

A ventilation system 200 as shown in FIGS. 21 and 22 can be used in homes, vehicles, etc. Moreover, the total heat exchange element 100 can be installed not only in a house or in a vehicle, but also in a space separated from each other, and can be used as a ventilation system 200.

Further, the ventilation device 200 can also be of a time-sharing type in which the direction of the fan is changed from A to B shown in FIG. 21 for a predetermined period of time, and then switched from B to A. For example, air is supplied from outdoors to indoors for a predetermined time, and after a predetermined time elapses, air is exhausted from indoors to outdoors, and after a predetermined time, the air supply and exhaust are switched. In this way, the space can be ventilated while exchanging heat more efficiently.

Furthermore, the ventilation device 200 can include a plurality of total heat exchange elements 100. When the total heat exchange elements 100 are at least the first total heat exchange element 100 and the second total heat exchange element 100, when the first total heat exchange element 100 is supplying air to the space, the second total heat exchange element 100 The total heat exchange element 100 evacuates the space. Further, after a predetermined period of time has elapsed, for example, several tens of seconds, the first total heat exchange element 100 exhausts the space, and the second total heat exchange element 100 supplies air to the space. Then, the air supply and exhaust air of the first total heat exchange element 100 and the second total heat exchange element 100 are switched at a period of a predetermined time. In this way, the ventilation device 200 according to the present disclosure can be of a time-sharing type in which air supply and exhaust are switched after a predetermined period of time has passed. In this way, the space can be ventilated while exchanging heat more efficiently.

As described above, the ventilation device 200 according to the present disclosure has a humidity control function and can efficiently exchange heat.

Although each embodiment and each example of the present disclosure has been described in detail as above, those skilled in the art will appreciate that many modifications can be made without substantially departing from the novelty and effects of the present disclosure. , it will be easy to understand. Therefore, all such modifications are included within the scope of the present disclosure.

For example, a term that is described at least once in the specification or drawings together with a different term with a broader or synonymous meaning can be replaced by that different term anywhere in the specification or drawings. Further, the configuration and operation of the total heat exchange element and the ventilation device are not limited to those described in each embodiment and each example of the present disclosure, and various modifications are possible.

Claims

A total heat exchange element comprising a humidity control material in a heat storage base material,
The humidity control material includes a water absorbent resin and a humidity control component impregnated into the water absorbent resin,
The total heat exchange element is characterized in that the heat storage base material is continuously formed with a latent heat section carrying the humidity control material and a sensible heat section not carrying the humidity control material.
The total heat exchange element according to claim 1, wherein the heat storage base material surface in the latent heat section is a hydrophilic treated surface.
The total heat exchange element according to claim 1, wherein the heat storage substrate surface in the sensible heat section is a water-repellent treated surface.
The total heat exchange element according to claim 1, wherein the latent heat section and the sensible heat section are arranged adjacent to each other in parallel to the air blowing direction.
The total heat exchange element according to claim 1, wherein the latent heat section and the sensible heat section are arranged adjacent to each other perpendicularly to the air blowing direction.
The total heat exchange element according to claim 1, wherein the sensible heat section has a latent heat storage material attached thereto.
The total heat exchange element according to claim 6, wherein the latent heat storage material has a phase transition temperature of 25 to 35°C.
The total heat exchange element according to claim 6, wherein the latent heat storage material is made of paraffins.
The total heat exchange element according to claim 1, wherein the heat storage base material is metal.
The total heat exchange element according to claim 1, wherein the water absorbent resin has an average particle size of 10 to 100 μm.
The total heat exchange element according to claim 1, wherein the humidity control component includes a carboxylic acid salt that forms hydrate crystals.
The total heat exchange element according to claim 1, wherein the humidity control component includes a carboxylic acid salt that forms hydrate crystals and an additive that adjusts the crystallization threshold humidity.
A ventilation system characterized by being a time-sharing type equipped with the total heat exchange element according to any one of claims 1 to 12.
The ventilation device according to claim 13, further comprising a pipe that accommodates the total heat exchange element and a blower fan that blows air through the total heat exchange element.
The ventilation device according to claim 14, which is for residential use or for vehicle use.