JP2021085551A - Air-to-air heat exchanger - Google Patents

Abstract

To solve the problem of delaying commercialization in comparison with a cooling device using a refrigerant because a cooling system for directly cooling air with air by using evaporative latent heat of water, that is, indirect water evaporation type cooling has problems in cost, manufacturability and reliability of an air-to-air heat exchanger to be used for the same, in a technology for cooling air.SOLUTION: A technology of a rational new material design, structural design and manufacturing for achieving an air-to-air heat exchanger with a high performance, high quality and inexpensiveness to be usable to an indirect water evaporation type cooler or an air cooling machine is concretely proposed.SELECTED DRAWING: Figure 1

Description

A device that cools and cools indoor air with outdoor air is called an air conditioner, and a method is realized in which the refrigerant is compressed by a compressor, the high temperature refrigerant is cooled by the outdoor air, and the indoor air is cooled by the refrigerant. Is popular. However, this method consumes a large amount of power from the compressor, and has a big problem from the viewpoint of global warming together with the use of the refrigerant.

On the other hand, in the case of the direct cooling method in which the indoor air is directly cooled and cooled by the outdoor air, in order to obtain the cooling effect even a little, the cooling air (outdoor air) is not cooled by the dry bulb temperature but a wet bulb having a lower temperature. It is widely known that the use of temperature is effective. For this reason, it is effective to continuously sprinkle water on the cooling air to lower it to the wet-bulb temperature and use it as a cooling source, which is known as an indirect cooling method using water evaporation (IDEC, Indirect Evaporative Cooling). .. In recent years, many performance improvement measures and improvement technologies have been studied for this method.

The so-called fin tube heat exchanger, which is a refrigerant-to-air heat exchanger used in the above-mentioned air conditioner, has already been designed to achieve extremely high performance, reliability, and compactness, and a manufacturing method capable of mass production has already been established.

However, the air-to-air heat exchanger used for cooling and cooling by the indirect cooling method using water evaporation has not been designed and manufactured in a manner comparable to the refrigerant-to-air heat exchanger, and therefore the final product, air. Cooling devices and cooling devices are not miniaturized, inexpensive, sufficiently reliable, and mass-produced.

Here, we propose design technology and manufacturing technology that provide excellent air-to-air heat exchangers that are indispensable for commercializing actual air conditioners and the like.

Patent Document 1 presents a technique for realizing a heat exchanger that utilizes the latent heat of vaporization of water.
That is, new technologies are clearly presented for the following three points.
1. Cooling air is passed through the wet channel to form a wet film by attaching a water retention agent to the heat transfer surface in order to utilize the wet-bulb temperature, and the cooled air (treated air) that passes through the dry channel through the heat transfer surface. ) Is cooling.
2. In order to enhance the cooling effect, cooling air and uncooled air are flowed in a countercurrent flow.
3. By taking out a part of the air at the outlet of the cooled air flowing through the dry channel and flowing it to the wet channel in the direction opposite to the dry channel, the treated air of the dry channel is separated by this part of the air. Cool more efficiently.
The above three techniques are extremely effective techniques for cooling the treated air.
However, it must be said that the method, structure, and material are far below those basic technologies of the fin tube heat exchanger described above from the viewpoint of realizing a product by mass production.

Patent Documents 2 and 3 all use a method of increasing the amount of heat retained (temperature / humidity), that is, enthalpy, of the exhaust heat of ventilation to cool the indoor space as a result, but in each case, the cooling air uses the dry-bulb temperature. Wet-bulb temperature, which gives a lower temperature than that, is not used. That is, it is an example of performing ventilation cooling or ventilation dehumidification using the dry-bulb temperature, and its energy efficiency cannot be said to be excellent.
Certainly, these technologies have the effect of increasing the enthalpy of the ventilated air and disposing of it as compared with the method of simply exhausting the indoor air from the interior space of the building, thereby reducing the loss of air conditioning energy. Moreover, both have the effect of reducing the energy loss due to ventilation by installing a ventilation element or the temperature and humidity between indoor and outdoor air called a total heat exchanger, that is, a total heat exchanger, and a desiccant dehumidification function. It is also an excellent system in terms of ensuring the comfort of air conditioning by controlling humidity in that it has a dehumidifying operation function. However, in Patent Documents 2 and 3, a large amount of energy is consumed to realize the cooler and the reheater, and a large amount of energy is also consumed in the cooler and the heating means.

In order to commercialize an air conditioner that uses electric power and does not use a refrigeration cycle that uses a refrigerant, it is first important to make an air-to-air heat exchanger called IDEC practical. Therefore, there are some themes that need to be resolved, and I would like to outline them below.

Japanese Patent Application Laid-Open No. 2009-150632 Public Relations Japanese Patent Application Laid-Open No. 2000-11106 Japanese Patent Application Laid-Open No. 06-123444 Public Relations

The problem to be solved by the present invention is the realization and realization of an air-to-air heat exchanger that can directly cool an indoor space with outdoor air without consuming a power source or a heat source, and mass-produces the air-to-air heat exchanger. It is a manufacturing technology and is proposed in this patent.

The realization of the following specific technologies is an issue for structural design to realize this and manufacturing suitable for mass production.
1. A heat exchanger that compactly realizes two air passages for cooling air and cooled air 2. Ensuring airtightness between the two air passages and realizing highly productive measures for that purpose 3. Realization of concrete measures for ensuring a high degree of heat transfer characteristics between the two airs 4. Structural design proposals and manufacturing technologies such as a method for highly utilizing the two airs.

In order to secure a ventilation path for two air to flow inside, a large number of thin aluminum heat transfer plates are stacked with a gap pitch, and the necessary parts are joined appropriately to assemble an integrated heat exchanger body. is required. The method depends on the realization of a technique for completing a tremendous number of stacking operations of joining more than 100 adjacent heat transfer plates one by one in a highly productive manner.
For this reason, claim 1 shows a method of performing hemming press working, which is performed hundreds of times necessary for joining a large number of heat transfer plates, in one press working.

In order to realize the hemming joint of all heat transfer plates by one press working, as shown in Fig. 5, the press pressure transmission jig is sandwiched between many hemming joint parts so that there is no gap, and all the heat transfer plates are joined. The hemming joint is completed at the same time by one press working, and the detailed technique is shown in details in FIGS. 5, 6 and 7. The air-to-air heat exchanger assembled by this method is shown in claim 1.

Further, claim 2 shows a technique for completing the hemming pressure-welded portions on the four outer peripheral sides of the heat transfer plate by one press working at the same time. The method of pressing all four sides at the same time is clearly shown in FIGS. 5 and 6.

Claim 3 shows an important technique for reliably executing this step and completing the pressure welding of all the hemming portions with high reliability. Since the press pressure transmission jig is not fixed to the equipment, if it moves horizontally when the press pressure is applied vertically, not only the hemming part will not be pressed normally, but also the heat transfer plate may be deformed. In order to prevent this, horizontal movement is prevented by the method shown in FIG.

In fin tubes, which are refrigerant-to-air heat exchangers, aluminum fins use aluminum plates with a thickness of around 0.1 mm all over the world. It has been selected as the most suitable material cost, heat transfer performance, durability reliability, mass productivity, etc. for commercialization, and has become the de facto standard all over the world. Therefore, even if it is placed in an air-to-air heat exchanger, it is important to use an aluminum plate with a thickness of about 0.1 mm, that is, a thickness of 0.12 mm or less as the main specification in order to enhance the cost-based commercial value. That's why. In order to realize this, it is known that its thinness is deformed due to insufficient strength of the aluminum plate and it is difficult to have a gap pitch between the heat transfer plates. It is possible to maintain the pitch dimension and strength against wind pressure by attaching a pitch spacer to the gap in the central part of the heat transfer plate, but to maintain the pitch accuracy of the outer peripheral part of the heat transfer plate, the hemming side edge near the side Since it is not possible to attach a spacer to the part before the hemming process, it is effective to insert it from the outside after the process to maintain the spacer function. This technique is shown in claim 4.

Claim 6 proposes that a large number of spacers are integrally connected to each other, and the productivity and insertability of the spacers are significantly improved as compared with the method of inserting the spacers one by one.

When two adjacent heat transfer plates are crimped by hemming and joined, the joint surface is generally an extension of one heat transfer surface. This embodiment is shown in FIG. However, when considering the inflow and outflow resistance of the operating air into the air-to-air heat exchanger and the outflow resistance, the air resistance is achieved by making the joint surface the center of the ventilation path in the gap between the adjacent heat transfer plates. Is known to decrease. An example in which this joint is optimized is shown in FIG. This technique is shown in claim 5.

When using the heat exchanger body laminated and assembled as described above, it is important to secure air leakage, water leakage, and wind pressure strength at the hemming joint. In particular, when an aluminum plate having a wall thickness of 0.12 mm or less is used as a heat transfer plate, its importance becomes high. A method for drastically solving this problem is presented in claims 7, 8, 9, and 10. Conventionally, when joining by hemming, it is a general method to apply an adhesive to each joint surface and join, but that does not solve the problem of insufficient sealing due to coating spots, and also increases the work man-hours. , Invited an increase in manufacturing cost.

A method for solving this problem is a method in which the entire body is immersed in a sealing liquid after hemming assembly to improve the degree of perfection of the sealing at the joint, improve workability, and reduce the manufacturing cost. The method of immersing the whole body (claim 7) and the method of claim 8 in which the sealing liquid is replenished from the ventilation path on the inner surface of the heat exchanger body to the inner surface are presented, which is suitable for the heat exchanger body structure and the working environment. Select the method.

Claim 11 presents one technique for effectively utilizing the air-to-air heat exchanger of the present invention. When cooling the air to be cooled by sprinkling water on the cooling air side and utilizing the latent heat of evaporation of water, it is cooled by reusing 20 to 40% of the air once cooled as cooling air. It is a technology that cools the temperature of air to a lower temperature. At this time, when returning the reused air to the cooling air side, the proposed technique is performed without installing a new blower.

The twelfth aspect is applied to the air conditioner of the type which sprinkles water on the cooling air side and cools the cooled air by utilizing the latent heat of vaporization of water. It is a technology that makes effective use of cooled air for cooling, etc., and at the same time uses it for cooling when the air to be cooled becomes discarded air. The humidity of the air is high, but the temperature is high. The temperature is as low as that of cooled air, and the cooling effect is utilized.

The following effects can be expected from the above invention.
1. It becomes possible to provide an air-to-air heat exchanger that cools air that can be mass-produced with low cost, high quality, high performance, and can contribute to the practical application of air-conditioning products having various effects.
2. It is possible to commercialize a cool breeze type cooling device that can cool the cooled air to a low temperature by sprinkling water on the cooling air and is excellent in improving energy and the global environment instead of an air conditioner that consumes power.
3. It is possible to realize a cooling system, a cooling device, and a cooling device that do not use a refrigerant, which can contribute to the global environment.
4. From the above, it is possible to contribute to the practical use, commercialization, and popularization of not only residential air conditioners but also air conditioners in the market where conventional air conditioners are difficult to spread. These include factories, gymnasiums, barns, piggery, poultry houses, school facilities, open restaurant air conditioners, and even communication base station air conditioners.

External view of the air-to-air heat exchanger according to the present invention The figure which shows the combination of heat transfer plates used in the heat exchanger of this invention. Heat transfer plate used in the present invention Sectional drawing which shows combination of heat transfer plates of this invention Cross-sectional view showing a method of integrally caulking the heat transfer plate of the present invention. Top view showing the method of press working of the integral caulking of the present invention. Top view of the jig for pressing the crimped portion of the present invention and the method of suppressing the heat transfer plate. Cross-sectional view showing that the joint surface between the heat transfer plates of the present invention is set to the central portion.

FIG. 1 is an external view of an air-to-air heat exchanger, showing 7: cooled air, 8: cooled air, 5: cooling air, and 6 cooling air disposal. In the heat exchanger, 120 heat transfer plates: 2 are assembled, and the side plates: 12 and the holding frame 11 are integrated. The heat transfer plate uses a corrosion-resistant coating film using an epoxy resin on the surface and an aluminum plate with a thickness of 0.1 mm in which a hydrophilic coating film such as water glass is pre-painted. It is composed of 120 heat transfer plates molded into a shape that maintains a gap pitch of 3 mm, and therefore the width W shown in FIG. 1 is approximately 120 * 3.0 = 360 mm.

The relationship between the combinations of adjacent heat transfer plates is shown in FIG. This mutual relationship has a structure that keeps 120 sheets overlapping. As shown in FIG. 3, the planar shape of the heat transfer plate is such that the central portion is formed with a heat transfer plate uneven shape: 13 and the outer peripheral portion 14 of the heat transfer plate is a flat surface. The hemming side end portion: 3 is bent 90 degrees, and the step bent portion is bent at the bent portion: 4 at a two-step step in order to realize the gap pitch between the heat transfer plates. FIG. 4 shows a shape formed into a hemming shape so that the hemming side end portion: 3 sandwiches the step bent portion: 4.

In FIG. 4, a pitch spacer: 16 is attached before assembly in order to maintain the gap pitch between the heat transfer plates. A method is taken to improve the accuracy of the gap pitch by moving this toward the end side of the heat transfer plate and locating it in the vicinity of the hemming bending pressure contact portion: 41. In that case, the pitch spacer is used for heat transfer in FIG. 4 after the assembly is completed. As shown in claim 5, where the method of inserting from the outside of the plate (right side in the figure) is effective, the pitch spacer: 16 is integrally connected on the outside of the heat transfer plate (right side in the figure). The use of (not shown) can be expected to improve the workability of the above-mentioned insertion work, and this technique is shown in claim 5.

FIG. 5 shows a diagram in which the heat transfer plates are stacked horizontally as described above. A heat transfer plate written with a chain wire and a heat transfer plate written in practice are joined by a hemming bending pressure contact portion 41. However, it is necessary to apply a press pressure to the hemming bent portion: 41 to make a strong bond. A technique for simultaneously performing this press pressure welding is described in claims 1 and 2. A side view showing the state of pressure contact is shown in FIG. The press pressure welding transmission jig: 52 has a rectangular cross section and is inserted into the gap between the two upper and lower hemming bending pressure welding portions. A pressure is applied to: 55 from above, and a pressure contact force is applied to the entire combination of the press transmission jig: 52 and the hemming bending pressure contact portion 41 to complete the hemming molding and join the heat transfer plates together.

At the time of this pressure welding work, the heat transfer plate: 2 and the press pressure transmission jig are suppressed from the outer circumference to prevent horizontal displacement, and the press holding column: 51 is positioned at the position shown in FIG. 6 in order to properly perform the hemming pressure welding process. Let it be installed in. The cross-sectional shape of the press holding column is shown in FIG. The members shown in FIG. 6 are sequentially stacked on the pressure welding support base: 56. First, the heat transfer plates are stacked as shown in FIG. 2, and then the press pressure transmission jig is placed on the side surface while pushing and bending the hemming portion. Is inserted at the position shown in FIG. As shown in FIG. 7, the insertion allowance is stopped at a position determined as can be seen from the cross-sectional shape of the press holding column: 51, that is, at a position in contact with the heat transfer plate, and then pressed from the outside by the press pressure transmission jig 53. The horizontal position is fixed.

The heat transfer plate 2 is also pressed. In the support column: 51 (Fig. 2), the positions are fixed at the four corner notches of the heat transfer plate, so all the parts are fixed in the horizontal position and can move freely only in the vertical direction. The pressure welding pressure plate: 56 is pressure-welded by the pressure-welding movement, and as a result, all the hemming bending pressure-welding portions are pressure-welded.

FIG. 8 shows another embodiment. The position of pressure contact between the heat transfer plates was changed and moved to the center of the two heat transfer plates, that is, the intermediate position between the air passages 19 and 20, and the effect was that the two air inflows and outflows. It realizes the reduction of the ventilation resistance generated at the time, and realizes the effect of reducing the blowing power of the two airs and reducing the blowing noise.

FIG. 1 shows the separated cooled air: 9. By adding 20 to 40% of the cooled air 8 to the cooling air: 5 as the separated cooled air: 9 and flowing it to the additional cooling part 10 which is the outlet part of the cooled air: 7. Cooled air: A technology that can cool the temperature of 8 to a lower temperature. The cooled air separated at that time: 9 consumes the fan for the exhaust of the cooling air: 6 or the drive fan power of the cooled air 8 to eliminate the need for another new blower. It is a technology that prevents the increase in power consumption.

Although not shown, both cooled air: 8 and cooling air exhaust: 6 are cooled to near the wet bulb temperature, so both can be used for cooling, and 8 is not humidified. For cooling, 6 can be used for cooling because it is humidified. If water evaporative cooling is performed by sprinkling water on the air-to-air heat exchanger, these two types of air can be utilized.

As can be seen from the above explanation, it is possible to provide an air conditioner having an excellent cooling function for the global environment in an extremely wide market. Compared to conventional electric compressor type air conditioners, indoor air can be cooled without the need for a compressor or refrigeration cycle, so power consumption can be significantly reduced.
Taking advantage of this characteristic, it is expected that this technology will penetrate the air conditioner market of about 8 trillion yen worldwide. As a result, the map of the air conditioner industry, which mainly uses refrigerants, will be repainted, leading to new industries, and at the same time, contributing to the realization of a vast new market where air conditioners could not enter due to restrictions on power consumption. It is expected to lead to the maintenance and expansion of affluent and healthy life.

1 Air-to-air heat exchanger 2 Heat transfer plate 3 Hemming side edge 4 Step bending part 5 Cooling air 6 Cooling air exhaust 7 Cooled air 8 Cooled air 9 Separated cooled air 10 Addition Part to be cooled 11 Retaining frame 12 Side plate 13 Heat transfer plate Concavo-convex shape 14 Heat transfer plate outer circumference 15 Gap pitch 16 Pitch spacer 19 Ventilation passage for cooling air 20 Ventilation passage for cooling air 41 Hemming bending pressure welding part 51 Press holding strut 52 Press pressure transfer jig 53 Press pressure transfer jig restraint 55 Press support 56 Pressure welding pressure plate

Claims (12)

A rectangular or square flat plate made of a thin aluminum plate is used as a heat transfer plate, and a large number of sheets are stacked so that the adjacent heat transfer plates have a constant gap pitch, and the end edges of the heat transfer plates match the gap pitch dimension. On the other hand, the opposite ends of the heat transfer plates adjacent to the heat transfer plate are folded back to form a hemming shape, and the end edges bent in the step shape are pressed and joined in a state of being sandwiched. The two adjacent heat transfer plates were connected in multiple states while maintaining the gap pitch, and the connections were spread over the entire heat transfer plate to form an integral unit, and two independent ventilation passages were provided inside. A heat exchanger body, and two air flowing through the ventilation passages are introduced and exhausted from the four outer surfaces of the heat exchanger body, respectively, and the heat transfer plate is passed between the two airs. In the heat exchanger body in which heat exchange is performed,
At the time of its manufacture, a press pressure transfer jig was inserted between the hemming pressure welding points of all the heat transfer plates and the hemming pressure welding points of the adjacent heat transfer plates to stack the whole, and the whole stacked sequentially was the heat transfer plate. Place it on the press support so that it is horizontal, apply pressure contact force from the upper part of the heat exchanger body to the uppermost part of the press pressure transfer jig, and press all the hemming processing pressure contact points at the same time to press contact. An air-to-air heat exchanger characterized in that all the press pressure transfer jigs were then removed and the entire heat transfer plate was assembled integrally. The air-to-air heat exchanger according to claim 1, wherein the entire heat transfer plate is pressed by simultaneously applying pressure contact force to all four sides around the hemming pressure contact portion to complete the assembly. .. In order to place the heat transfer plate in a horizontal state and simultaneously press the entire heat exchanger body at the hemming processing pressure welding location, the press pressure transmission jig is placed at the pressure welding location to transmit the press pressure, and the heat is transmitted. Stand vertically so as to be in contact with the four side ends of the heat exchanger body and to be in contact with the outside of the press pressure transfer jig to support the exchange body so that the horizontal position does not shift. The air-to-air heat exchanger according to claim 1 or 2, wherein the press holding columns are installed at four corners and assembled by performing the press working. A rectangular or square flat plate made of an aluminum plate with a wall thickness of less than 0.12 mm is used as a heat transfer plate, and a large number of plates are stacked so that the adjacent heat transfer plates have a constant gap pitch, and the sides of the heat transfer plate are used. The end of the heat transfer plate is bent to a step size that matches the gap pitch dimension, while the end of the opposite side of the heat transfer plate adjacent to the heat transfer plate is folded back to form a hemming shape. By pressing and joining the two adjacent heat transfer plates while holding the gap pitch, and joining the whole parts in the same way as appropriate, the two independent heat transfer plates are inside. The heat exchanger body is provided with the heat exchanger body, and the two air flowing through the heat exchanger body are introduced and exhausted from the four outer surfaces of the heat exchanger body, and between the two air passages. In an air-to-air heat exchanger in which heat is exchanged through the heat transfer plate,
On the four outer surfaces of the heat exchanger body into which the two airs are introduced or exhausted, the pitch from the outside of the heat exchanger body to the gap pitch between adjacent heat transfer plates that are not hemmed coupled. An air-to-air heat exchanger characterized in that the gap pitch between the heat transfer plate and the adjacent heat transfer plate is maintained at a predetermined set value by inserting and fixing a spacer having dimensions according to the dimensions. .. The spacers to be inserted from the outside between the heat transfer plates are assembled into an integral spacer in which two or more spacers are connected, and the spacers are inserted into the space between two or more adjacent heat transfer plates to be inserted between the heat transfer plates. The air-to-air heat exchanger according to claim 4, wherein the interval pitch is maintained within an appropriate range. A rectangular or square flat plate made of an aluminum plate is used as a heat transfer plate, and a large number of heat transfer plates are stacked with a constant gap pitch between adjacent heat transfer plates, and the edge of the heat transfer plate is set to 1/2 of the gap pitch. Bend in a stepped shape so that the other side is bent in a reverse stepped shape so that the opposite sides of the adjacent heat transfer plates have a dimension of 1/2 of the gap pitch, and the tip thereof is made into a hemming shape and relative to each other. The ends of the side bent in a stepped shape of the heat transfer plate are pressed and joined in a state of being sandwiched, and the two adjacent heat transfer plates are held and joined so as to have the gap pitch. By appropriately deploying this coupling on all necessary sides, the whole becomes a heat exchanger body provided with two independent ventilation passages inside the heat exchanger body, and the ventilation passages are provided from the four outer surfaces of the heat exchanger body. In an air-to-air heat exchanger of a type that is configured to introduce and exhaust two flowing air and exchange heat between the two air through the heat transfer plate.
An air-to-air heat exchanger characterized in that the joint position value of the surfaces bonded in the hemming shape is at or near the center position of the gap pitch between two adjacent heat transfer plates. A rectangular or square flat plate made of a thin aluminum plate is used as a heat transfer plate, and a large number of adjacent heat transfer plates are stacked with a constant gap pitch, and the edge of the heat transfer plate has a step size that matches the gap pitch dimension. On the other hand, the opposite ends of the heat transfer plates adjacent to the heat transfer plate are folded back to an appropriate size to form a hemming shape, and the end edges bent in a stepped shape are pressed and joined to be adjacent to each other. The two heat transfer plates are connected to each other while maintaining the gap pitch, and the whole is formed as a heat exchanger body having two independent ventilation passages inside the heat exchanger body, and the four outer surfaces of the heat exchanger body. In the heat exchanger body, which is configured to introduce and exhaust two air flowing through the ventilation passage and exchange heat between the two air through the heat transfer plate.
In order to ensure the air sealability of the hemming-shaped joint portion, the heat exchanger is provided so that one of the four surfaces for introducing and exhausting air from the heat exchanger body faces downward and is horizontal. The body is held, and all the joint portions of the hemming shape of the surface are immersed in the liquid tank so that the sealing liquid fills the joints, soaked into the gaps between the surfaces pressed by the hemming process, and then from the liquid tank. It is pulled up to discard the excess sealing liquid, and then a curing treatment such as drying the sealing liquid remaining in the joint gap is performed, and the same treatment is performed over the four surfaces to perform all the treatments. An air-to-air heat exchanger characterized in that it has been completed by strengthening the air or water sealing property of the hemming-shaped joint portion. A rectangular or square flat plate made of a thin aluminum plate is used as a heat transfer plate, and a large number of adjacent heat transfer plates are stacked with a constant gap pitch, and the sides of the heat transfer plates have a step size that matches the gap pitch dimension. Bend, on the other hand, the ends of the opposite sides of the heat transfer plate adjacent to the heat transfer plate are folded back to an appropriate size to form a hemming shape, and the ends of the side bent in a stepped shape are pressed and joined together. Then, two adjacent heat transfer plates are connected while maintaining the gap pitch, and the whole is formed as a heat exchanger body having two independent ventilation passages inside the heat exchanger body, and the four heat exchanger bodies. In the heat exchanger body, which is configured to introduce and exhaust two air flowing through the ventilation path from the outer side surface and to exchange heat between the two air through the heat transfer plate.
In order to enhance the air sealability of the hemming-shaped joint portion, the heat exchanger body is such that one of the four surfaces for introducing and exhausting air from the heat exchanger body faces downward and is horizontal. Is replenished and filled up to the inner surface so as to spread over the inner surfaces of the gaps of all the hemming-shaped joint portions of the surface, and the gaps between the surfaces pressed by the hemming process are impregnated from the inside. , Excessive sealing liquid is discharged, and then a curing treatment such as drying the sealing liquid remaining in the gap is performed, and the same treatment is performed over the four surfaces to obtain all the hemming shapes. An air-to-air heat exchanger characterized by enhanced sealing of air or water at the joint. The invention according to claims 7 and 8, wherein a paint or a filler that is liquid and hardens within 10 hours after being left in the air, such as a water-based lacquer, a nitrified cotton lacquer, or a liquid epoxy, is used as a material for the sealing liquid. Air-to-air heat exchanger As the heat transfer plate, a hydrophilic and corrosion-resistant coating film that becomes a rigid film-like coating treatment was applied to the surface in advance so that the hemming process and the seal liquid coating process could be additionally applied to the entire front and back surfaces. Made of a thin aluminum plate, a concave-convex shape for improving water retention and heat transfer characteristics or obtaining a gap pitch between the heat transfer plates is formed in the center of the surface of the heat transfer plate by press processing, and the heat transfer is performed. The outer peripheral portion of the surface is left as a flat surface without molding the uneven shape, a large number of sheets are stacked, the hemming process is performed using the flat surface portion, and the bonding strength and air are immersed in the sealing liquid. The air-to-air heat exchanger according to claim 1, 2, 3, 4, 5, 6, 7, 8 and 9, characterized in that the leak-sealing property is sufficiently ensured. Using the air-to-air heat exchanger, the two airs to be operated are sprinkled on the air on the cooling side to cool the air on the other cooling side with the latent heat of evaporation of water, and the cooling air A part of the cooled air is separated, and the air pressure of the cooled air is not added to the outlet side portion where the cooled air flows out in the air-to-air heat exchanger, without adding a blower. 1 and 2, characterized in that, by attracting the air to be cooled, it was additionally poured into the air to be cooled and utilized to contribute to lowering the blowing temperature of the air to be cooled. 3, 4, 5, 6, 7, 8, 9, 10 Air-to-air heat exchanger. A cross-flow type air-to-air heat exchanger in which the two airs to be operated are allowed to flow inside, and the air on the cooling side is sprinkled to cool the other air on the cooling side by the latent heat of evaporation of water. Use,
Of the two airs, the cooled air that has been exhausted is used for cooling cooling of humans, livestock, electronic devices, etc., and the cooled air is cooled by utilizing the latent heat of evaporation of sprinkled water. By using the exhaust air of the cooling air for cooling the ceiling, walls, etc., and for cooling the entire space and equipment for both air, it was utilized for effective use of cooling performance. The air-to-air heat exchanger according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10.

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