JP5987854B2 - Heat exchange element and heat exchanger - Google Patents

Description

  The present invention relates to a heat exchange element and a heat exchanger that are used in, for example, a ventilator that performs air supply from the outside to the room and exhaust from the room to the outside at the same time.

  In recent years, as air-conditioning equipment such as heating and cooling has been developed and spread, and the living area using the air-conditioning apparatus has expanded, the importance of a heat exchanger for ventilation that can exchange temperature and humidity has increased. In such a heat exchanger, a heat exchange element is mounted as an element part for heat exchange. In a heat exchange element for performing heat exchange, an air supply channel and an exhaust channel are formed as channels independent of each other with a partition member interposed therebetween, and the interval between the partition members is held by a spacing member.

  The characteristics required for the heat exchange element are high performance (heat exchange efficiency) for exchanging latent heat at the same time as sensible heat between the supply air flow and the exhaust air flow. There must be no mixing (ventilation) with dirty air exhausted outdoors. Furthermore, in order to reduce the power consumption in the air blower such as a fan or blower for circulating the air flow for ventilation and to keep the operating sound of the heat exchanger low, the ventilation resistance (pressure loss when each air flow flows) , Also called static pressure loss) is required to be as low as possible. In recent years, with the increasing demand for energy saving of air conditioners, improvement in characteristics required for these heat exchange elements has been increasingly demanded. In addition, with the widespread use of heat exchangers, heat exchangers have also been installed in cold districts, bathrooms, and hot water pools where the temperature difference between the supply air flow and the exhaust air flow is large. In such an environment, for example, at the start of operation of the heat exchanger when air conditioning is not performed indoors, although condensation does not occur, both the supply air flow and the exhaust air flow become high and temporarily The heat exchange element is exposed to a very high humidity environment. For this reason, in recent years, resistance to a high humidity environment is also required for the heat exchange element.

  The characteristics required for these heat exchange elements are primarily borne by the partition member. In order to satisfy the moisture resistance with respect to the partition member of the heat exchange element in a high-humidity environment, a partition member composed of a nonwoven fabric base material layer and a resin layer that are small in dimensional change due to moisture is effective. Furthermore, in order to improve the moisture permeability (moisture exchangeability) of the partition member, a method of adding a hygroscopic agent to the resin layer of the partition member is used.

  However, in a partition member added with a hygroscopic agent in order to improve moisture permeability, the amount of moisture absorbed by the hygroscopic agent added to the partition member in a high humidity environment continues to absorb a large amount of water vapor in the air. Becomes more than the water retention capacity of the partition member, and the moisture absorbent flows away from the partition member together with water. Since the lost hygroscopic agent is absorbed from the partition member to the interval holding member, the problem of the hygroscopic agent flowing away from the partition member in a high humidity environment strongly affects the interval holding member. In this regard, for example, at the joining portion that joins the partition member including the resin layer to which the moisture absorption salt is added and the spacing member, the partition member is changed to the spacing member using a non-aqueous material in which the moisture absorption salt is difficult to melt. A heat exchange element that suppresses the loss of hygroscopic salt has been proposed (see Patent Document 1).

WO2009 / 004695 Publication

  However, in the heat exchange element of Patent Document 1, a resin material having low moisture permeability is used as the spacing member, as in the case of the partition member, and in the long-term use of the heat exchange element in a high humidity environment, There is still a concern that the moisture absorption salt of the partition member is diffused to the interval holding member via the joint. In this case, the humidity exchange between the supply air and the exhaust gas is not sufficiently performed, which is a problem from the viewpoint of improving the performance of the heat exchange element. The present invention has been made in view of the above, and in the long-term use of a heat exchange element in a high-humidity environment, suppresses concentration diffusion of the moisture absorbent contained in the partition member to the spacing member, The purpose is to improve the exchange performance.

  In order to achieve the above-described object, the heat exchange element of the present invention forms a first flow path and a second flow path between a plurality of partition members and the plurality of partition members, and the first flow path. And an interval holding member that holds the interval between the partition members, and the partition member includes a hygroscopic agent. The resin layer and the nonwoven fabric base layer have a multilayer structure, the spacing member has a resin layer and a nonwoven fabric base layer, and the partition member resin layer and the spacing member have a nonwoven fabric base layer. And the nonwoven fabric base material layer of the partition member and the resin layer of the spacing member are joined.

  According to the heat exchange element and the heat exchanger of the present invention, in long-term use in a high-humidity environment, the concentration diffusion of the moisture absorbent contained in the partition member to the spacing member can be suppressed, so that the heat exchange performance is improved. Can be achieved.

1 is an external perspective view showing a schematic configuration of a heat exchange element according to Embodiment 1. FIG. FIG. 3 is a longitudinal sectional view showing one interval holding member and upper and lower partition members extracted from the heat exchange element according to the first embodiment. FIG. 3 is a longitudinal sectional view showing one interval holding member and upper and lower partition members extracted from the heat exchange element according to the first embodiment. It is the longitudinal cross-sectional view which extracted and showed one space | interval holding member of the conventional heat exchange element, and the partition member in the upper and lower sides. It is a figure which shows schematic structure of the heat exchanger of Embodiment 1. FIG.

Embodiment 1 FIG.
FIG. 1 is an external perspective view showing a schematic configuration of a heat exchange element according to an embodiment of the present invention. The heat exchange element 10 includes a first air flow path (first flow path) 4 provided in layers, a second air flow path (second flow path) 5 provided in layers, A flat partition member 1 that partitions the paths 4 and 5, a corrugated spacing member 2 that forms the respective channels 4 and 5 to maintain the spacing between the partition members 1, and the partition member 1 and the spacing member. 2 and a joining portion 3 that joins 2. The corrugated shape refers to a corrugated shape composed of peaks and valleys. The heat exchange element 10 has a structure in which flat partition members 1 and corrugated spacing members 2 are alternately stacked. When the partition member 1 and the spacing member 2 are stacked, the first air flow path 4 and the second air flow path 5 are obtained by crossing the direction of the crests of the spacing holding member 2 every other step. In a plan view, the channels 4 and 5 are independent from each other.

  Between the first air flow 6 flowing through the first air flow path 4 and the second air flow 7 flowing through the second air flow path 5, latent heat and sensible heat are exchanged using the partition member 1 as a medium. In the present embodiment, the interval holding member 2 has a corrugated shape, but the interval holding member 2 only needs to be able to hold the interval between the partition members 1 at a predetermined interval. For example, a sheet bent in a rectangular wave shape or a triangular wave shape, a plurality of plate pieces, or the like may be used.

  FIG. 2 is a longitudinal cross-sectional view showing one space holding member 2 and the partition members 1 above and below the heat exchange element 10 in the present embodiment. In the partition member 1, a resin layer 11 including a hygroscopic material and a nonwoven fabric base layer 12 are formed in a laminated structure. As for the space | interval holding member 2, the resin layer 21 and the nonwoven fabric base material layer 22 are comprised by the laminated structure. And the resin layer 21 of the space | interval holding member 2, the nonwoven fabric base material layer 12 of the partition member 1, the nonwoven fabric base material layer 22 of the space | interval holding member 2, and the resin layer 11 of the partition member 1 are joined by the junction part 3, respectively. . That is, the resin layer 11 containing the hygroscopic agent of the partition member 1 and the resin layer 21 of the spacing member 2 are not in direct contact with each other through the joint portion 3. That is, in the heat exchange element 10 of the present embodiment, the non-woven fabric base material layer 22 of the spacing member 2 that serves as a barrier to the concentration diffusion of the moisture absorbent exists through the joint portion, so that the moisture absorbent becomes the spacing member 2. It has a structure that does not diffuse the concentration. Hereinafter, in the heat exchange element in this Embodiment, it demonstrates in detail that the hygroscopic agent contained in a partition member can suppress density | concentration diffusion to a space | interval holding member in the long-term use in a high-humidity environment.

  In general, when the heat exchange element is used for a long time in a high humidity environment, the moisture absorbent added to the resin layer of the partition member keeps moisture absorbed in the air by continuing to absorb a large amount of water vapor in the air. The amount becomes equal to or greater than the water retention capacity of the partition member, and the moisture absorbent flows away from the resin layer of the partition member together with water. It is considered that the loss of the hygroscopic agent in the heat exchange element is caused by the movement of the hygroscopic agent accompanying the diffusion of the moisture concentration or the movement due to the concentration diffusion of the hygroscopic agent itself. The driving force for concentration diffusion in the heat exchange element is due to the difference in the spatial distribution of the concentration of moisture or the hygroscopic agent itself.

  A member having a polymer aggregation form is easy to cause thermal movement of the polymer, and easily absorbs moisture or moisture. In other words, if the polymer aggregated form member is in physical contact with a member having another polymer aggregated form, the hygroscopic agent will form the polymer aggregated form of the other member in the long-term use of the heat exchange element. There is a possibility of concentration diffusion to the members. Furthermore, if the amount of the material to which the hygroscopic agent diffuses is large, it is difficult to reach the concentration equilibrium of the hygroscopic agent in the diffusion. Is concerned.

  In this regard, in order to satisfy the moisture resistance of the heat exchange element partition member in a high humidity environment, it is effective to use a partition member composed of a nonwoven fabric base material layer and a resin layer that have a small dimensional change due to moisture. It is known that there is. Since the resin used in the partition layer and the resin layer that is a member containing the hygroscopic agent and the resin layer of the spacing member has a film shape, the amorphous structure of the polymer is the main component and the aggregated form is free. It has the feature that the volume is large. As a result, the partition member and the spacing member are easy to thermally move the polymer, and the moisture absorbent or moisture is likely to diffuse. In particular, since the spacing member generally has a surface area that is about 1.5 times that of the partition member, there is a large room for concentration diffusion of the hygroscopic agent from the partition member. Therefore, there is a possibility that the hygroscopic agent may be diffused from the resin layer of the partition member to the spacing member via the joint portion.

  On the other hand, the spacing member 2 of the heat exchange element 10 in the present embodiment has a feature that the nonwoven fabric base material layer 22 is included. Since the nonwoven fabric substrate is a fabric composed of fibers, it has many voids and has structural characteristics different from those of a resin that is a polymer aggregated form. In other words, since the fiber material is manufactured by stretching a polymer material, and has high crystallinity, the thermal motion of the polymer is frozen, and it is difficult for the moisture absorbent and moisture to diffuse. Therefore, since the nonwoven fabric base material layer 22 of the spacing member 2 serves as a barrier for concentration diffusion, the concentration diffusion of the hygroscopic salt remains up to the joint 3.

  A method for manufacturing the heat exchange element of the present embodiment will be described below. In general, for heat exchange elements, a manufacturing method in which a single-sided corrugate is produced and the single-sided corrugated layer is orthogonally stacked is widely used in order to realize efficient manufacturing. The single-sided corrugate is a film in which one partition member 1 and two spacing members 2 formed into a corrugated shape are joined. The manufacturing method of a single-sided corrugate is a process for making a general corrugated cardboard. A film that forms the spacing member 2 is formed into a corrugated shape, and this is joined to the partition member 1. In the manufacturing method of the direct lamination, the crest portion of the spacing member 2 formed into a waveform in the single-sided corrugate and the partition member 1 of another set of single-sided corrugates in which the flow path is orthogonally joined are joined. This is repeated and the heat exchange element 10 is obtained by cutting into predetermined dimensions. For joining the partition member 1 and the spacing member 2, a method using an adhesive or a heat bonding method not using an adhesive is used. From the viewpoint of the mechanical strength of the heat exchange element, a single-side corrugated joining step and direct lamination are performed. In any one of the joining steps, it is preferable to use an adhesive.

  In the heat exchange element 10 of FIG. 2, a cross-sectional structure of the joint portion 3 of the heat exchange element 10 using an adhesive is shown in both the single-side corrugated joining process and the direct lamination joining process. In FIG. 3, the resin layer 11 of the partitioning member 1 and the nonwoven fabric base material layer 22 of the spacing member 2 are joined by thermal bonding in the single-side corrugation process, and the nonwoven fabric base material layer 12 of the partitioning member 1 in the direct lamination process. The cross-sectional structure of the joining part of the heat exchange element 10 joined using the adhesive agent 3 between the resin layers 21 of the space | interval holding member 2 is shown. When joining using an adhesive, it is superior to the thermal bonding method in terms of the mechanical strength of the heat exchange element 10. On the other hand, the thermobonding joining in the heat exchange element shown in FIG. 3 is preferable to the method using an adhesive from the viewpoint of effectively suppressing the flow of the hygroscopic agent from the partition member 1 to the spacing member 2. In the joining by the heat bonding method in the heat exchange element shown in FIG. 3, the resin layer 11 of the partition member 1 is melted by heating, and the nonwoven fabric base material layer 22 of the partition member 1 and the nonwoven fabric substrate layer 22 of the spacing member 2 Are joined.

  Next, each member which comprises the heat exchange element in this Embodiment is demonstrated. The partition member 1 is a multilayer film composed of a resin layer 11 and a nonwoven fabric base layer 12. The resin layer 11 contains a hygroscopic agent in order to improve the moisture permeability of the partition member 1. In a heat exchange element in a high humidity environment, the paper material partition member undergoes a large dimensional change due to moisture swelling, which causes a problem that the air flow structure of the heat exchange element is blocked and the ventilation resistance is increased. There is a risk that the strength of the member 1 itself may be reduced. Therefore, since the partition member made of paper material is not suitable for use in a high humidity environment, in the partition member 1 used in the heat exchange element 10 of the present embodiment, a resin is applied to the nonwoven fabric base material layer 12 whose dimensional change due to moisture is small. The partition member 1 in which the layers 11 are stacked is used.

  The resin material of the resin layer 11 of the partition member 1 is not particularly limited as long as it is a highly moisture-permeable and gas-shielding film. However, in order to achieve sufficient moisture permeability, a thin film can be easily formed using a hydrophilic material. A urethane material is preferred. In particular, the urethane-based material is more preferably an ether-based polyurethane having high moisture permeability. These polyurethane resins are composed of an organic diisocyanate and a monomer such as an oxyethylene group-containing diol, or from at least one kind of an organic diisocyanate and a monomer such as an oxyethylene group-containing diol and at least one urethane prepolymer. A thermosetting resin type composed of at least one of a monomer such as an organic diisocyanate and an oxyethylene group-containing diol and a urethane prepolymer and polyurethane, or an aqueous solution of a resin already polyurethaneized, dimethylformamide Any one of a heat drying type using a solution, a methyl ethyl ketone solution, a toluene solution or the like can be used.

In the heat exchange element 10 in the present embodiment, a hygroscopic agent is added to the resin layer 11 of the partition member 1 in order to improve moisture permeability. It is desirable to use a deliquescent salt in order to impart high moisture permeability. The deliquescent salt uses at least one of lithium chloride and calcium chloride. The addition amount of lithium chloride or calcium chloride to the resin layer is ² to 10 g / m ² , preferably 3 to 6 g / m ² with respect to the resin layer.

  The nonwoven fabric base layer 12 is a fabric in which fibers are entangled without being woven, and the fiber material is preferably a cellulose fiber, a polyurethane fiber, a polyester fiber, a polypropylene fiber, or a mixture thereof from the viewpoint of the strength and cost of the fabric. . Since the polyester fiber or the polypropylene fiber is a hydrophobic material, it is more preferable because the moisture diffusing agent or moisture is low in the fiber.

The basis weight of the nonwoven fabric base layer 12 is 5 g / m ² or more and 100 g / m ² or less, preferably from the viewpoint of ensuring sufficient strength necessary for the partition member 1 and performing heat exchange between temperature and humidity more smoothly. It is 10 g / m ² or more and 30 g / m ² or less. In addition, the thickness of the non-woven fabric is also 2 μm or more and 500 μm or less, preferably 10 μm or more and 200 μm or less, more preferably 100 μm or more from the viewpoint of ensuring sufficient strength necessary as a partition member and performing heat exchange between temperature and humidity more smoothly 150 μm or less. The air permeability of the nonwoven fabric is preferably 1 second or less (measurement limit or less). Further, from the viewpoint of performing heat exchange between temperature and humidity more smoothly, the air permeability is preferably 1 second / 100 cc or less.

The moisture permeability of the partition member 1 in the present embodiment is measured from the infrared sensor method (mocon method) moisture permeability at a relative humidity of 100% and a temperature of 30 ° C. from the viewpoint of ensuring sufficient humidity exchange performance as the heat exchange element 10. The moisture permeability is 10 kg / m ² / day or more, preferably 15 kg / m ² / day or more. The gas shielding property of the partition member 1 in the present embodiment is 500 seconds / 100 cc or more, preferably 1000 seconds / 100 cc or more, in the air permeability measurement by the Gurley method. In this range, the intake and exhaust are separated more smoothly. In the partition member 1, the heat transfer resistance in the air boundary layer is the main factor in heat exchange between the intake and exhaust, and therefore hardly depends on the heat transfer property of the material of the partition member 1. Therefore, the heat transfer property of the partition member 1 hardly affects the heat exchange efficiency of the heat exchange element. In addition, in this Embodiment, although the partition member 1 has shown the resin layer 11 and the nonwoven fabric base material layer 12 with the two-layer structure, as long as there exists an effect of this Embodiment, the partition member 1 is one resin layer. There is no particular limitation.

  The interval holding member 2 defines a flow path shape. The spacing member 2 in the present embodiment has a multilayer film structure of the resin layer 21 and the nonwoven fabric base layer 22.

  The resin material of the resin layer 21 of the spacing member 2 is preferably a urethane-based material from the viewpoint of moisture permeability at the joint where the partition member 1 and the spacing member 2 are joined. In particular, the urethane material is more preferably an ether-based polyurethane having high moisture permeability. These polyurethane resins are composed of an organic diisocyanate and a monomer such as an oxyethylene group-containing diol, or from at least one kind of an organic diisocyanate and a monomer such as an oxyethylene group-containing diol and at least one urethane prepolymer. A thermosetting resin type composed of at least one of a monomer such as an organic diisocyanate and an oxyethylene group-containing diol and a urethane prepolymer and polyurethane, or an aqueous solution of a resin already polyurethaneized, dimethylformamide Any one of a heat drying type using a solution, a methyl ethyl ketone solution, a toluene solution or the like can be used.

The resin layer 21 of the spacing member 2 may contain a hygroscopic agent for moisture permeability at the joint 3 that joins the partition member 1 and the spacing member 2. The material of the hygroscopic agent is not particularly limited in the present embodiment, but it is desirable to use a deliquescent salt in order to give the partition member high moisture permeability. The deliquescent salt uses at least one of lithium chloride and calcium chloride. The addition amount of lithium chloride or calcium chloride to the resin layer is ² to 10 g / m ² , preferably 3 to 6 g / m ² with respect to the resin layer.

  A flame retardant may be added to the resin layer 31 of the spacing member 2 in order to ensure the flame retardance of the heat exchange element. The flame retardance of the spacing member 2 is not less than the second grade of flameproofing in the Meckel burner method, and preferably not less than the first grade of flameproofing. In the present embodiment, brominated flame retardants, phosphorous flame retardants, inorganic flame retardants such as metal hydroxides and oxides, silicone, etc., are used as the flame retardant material added to the resin layer 21 of the spacing member 2. Use a flame retardant.

  The nonwoven fabric base layer 22 of the spacing member 2 is a fabric in which fibers are entangled without weaving, and the fiber material is cellulose fiber, polyurethane fiber, polyester fiber, or polypropylene fiber from the viewpoint of fabric strength and cost, And mixtures thereof are preferred. Further, since the polyester fiber or the polypropylene fiber is a hydrophobic material, it is more preferable because the moisture diffusing agent or moisture is low in the fiber.

The basis weight of the nonwoven fabric base layer 22 is 10 g / m ² or more and 200 g / m ² or less, preferably from the viewpoint of ensuring sufficient strength necessary for the spacing member 2 and performing heat exchange between temperature and humidity more smoothly. Is 15 g / m ² or more and 150 g / m ² or less. In addition, the thickness of the non-woven fabric is sufficiently 5 μm or more and 500 μm or less, preferably 15 μm or more and 400 μm or less, more preferably 100 μm or more, from the viewpoint of ensuring sufficient strength necessary for the spacing member and smoother heat exchange between temperature and humidity 300 μm or less.

  For the ventilation of the heat exchange element, the spacing member 2 needs to be gas-shielding. The gas shielding property of the spacing member 2 in the dismantling of the present embodiment is 1 second / 100 cc or more, preferably 3 seconds / 100 cc or more, in the air permeability measurement by the Gurley method. In this range, the intake and exhaust are separated more smoothly, and the ventilation is sufficiently ensured.

Further, the moisture permeability of the spacing member 2 in the present embodiment is such that the moisture permeability is 6 kg / m ² / day or more in the infrared sensor method (mocon method) moisture permeability measurement at a relative humidity of 100% and a temperature of 30 ° C., preferably 10 kg / m ² / day or more. This is because in this range, the moisture permeability at the joint between the partition member 1 and the spacing member 2 is sufficiently ensured, and the humidity exchange performance between the supply air and the exhaust gas is sufficiently maintained. In addition, in the heat exchange element 10 of this Embodiment, although the space | interval holding member 2 has shown by the two-layer structure of 21 resin layers and 22 nonwoven fabric base material layers, the resin layer 21 is multiple layers. Not limited to.

  In the joining part 3 which joins the partition member 1 and the space | interval holding member 2, the method using an adhesive agent or the heat bonding method which does not use an adhesive agent is used as a joining method. When an adhesive is used for the joint 3, the main component of the adhesive is the material used in the resin layers of the partition member 1 and the spacing member 2 from the viewpoint of bonding the partition member 1 and the spacing member 2 more strongly. A resin material such as vinyl acetate, urethane, or polyester, or a composition thereof, having a polymer structure close to that of the resin is desirable. From the viewpoint of further improving the moisture permeability between the partition member 1 and the spacing member 2, it is desirable that the adhesive contains a hygroscopic agent. In this case, in order to give the partition member high moisture permeability, it is desirable to use a deliquescent salt, and it is more desirable to use at least one of lithium chloride and calcium chloride as the deliquescent salt. In the case where an adhesive is used for the joint portion 3, a flame retardant may be added to the adhesive in order to ensure the flame retardance of the heat exchange element. As a material of the flame retardant added to the adhesive in the present embodiment, a brominated flame retardant, a phosphorus flame retardant, an inorganic flame retardant such as a metal hydroxide or an oxide, or a silicone flame retardant is used.

  When heat bonding is used for the joint portion 3, the partition member 1 is heated at about the softening temperature of the resin layer 11 of the partition member 1, and the partition member 1 and the spacing member 2 are pressed and joined. Since the method of thermal bonding needs to pressurize the joint 3, it is desirable to perform it in a single-sided corrugating process in which pressurization is easy.

  FIG. 4 shows a heat exchange element 20 that is a single material in which the spacing member 2 according to the prior art is configured in an aggregated form of polymer materials. In the heat exchange element 20 of the prior art shown in FIG. 4, since the spacing member 2 is a single resin material (resin layer), the resin layer 11 containing the hygroscopic agent of the partition member 1 passes through the joint 3. It physically contacts the resin layer of the spacing member 2. For this reason, there is a possibility that the moisture absorbent of the partition member 1 may diffuse into the spacing member 2 in the long-term use of the heat exchange element regardless of the type of adhesive in the joint 3 and the details of the method of thermal bonding.

In the heat exchange element 10 of the present embodiment, the spacing member 2 is composed of a resin layer 21 and a nonwoven fabric base layer 22. Moreover, the resin layer 11 containing the hygroscopic agent in the partition member exists through the non-woven fabric base material layer 22 of the spacing member 2 constituting the partition member 1 and the joint portion. For this reason, the resin layer 11 containing the hygroscopic agent is isolated from the resin layer 31 of the spacing member 2 serving as the concentration diffusion destination of the hygroscopic agent by the nonwoven fabric base material serving as a barrier for the concentration diffusion of the hygroscopic salt. Therefore, it is possible to suppress the concentration diffusion of the hygroscopic agent contained in the partition member 1 to the interval holding member 2 by the configuration and the joining structure of the interval holding member 2 of the heat exchange element of the present embodiment.

  Next, the heat exchanger provided with the total heat exchange element 10 which concerns on this Embodiment is demonstrated using FIG. FIG. 5 is a diagram showing a schematic configuration of the heat exchanger 100 of the present embodiment. Inside the heat exchanger 100, the heat exchange element 10 of the present embodiment is accommodated. An air supply passage 44 for supplying outdoor air into the room including the first air passage 4 of the heat exchange element 10 is formed inside the heat exchanger 100. In addition, an exhaust passage 45 for exhausting indoor air to the outside including the second air passage 5 of the heat exchange element 10 is configured inside the heat exchanger 100. The air supply passage 44 is provided with an air supply blower 46 that generates an air flow from the outside to the inside of the room. The exhaust passage 45 is provided with an exhaust blower 47 that generates an air flow from the room to the outside.

When the heat exchanger 10 is operated, the air supply blower 46 and the exhaust blower 47 are activated. Thereby, for example, cold and dry outdoor air is passed through the first air flow path 4 as a supply airflow (first airflow 6), and warm and humid indoor air is exhausted (second airflow). 7) is passed through the second air flow path 5. Each of the air supply airflow and the exhaust airflow (two types of airflows) flows across the partition member 1. At this time, heat is transmitted between the airflows via the partition member 1, and water vapor permeates through the partition member 1, whereby sensible heat and latent heat are exchanged between the supply airflow and the exhaust stream. As a result, the supply airflow is warmed and humidified and supplied to the room, and the exhaust stream is cooled and dehumidified and discharged outside the room. Therefore, by ventilating with the heat exchanger 10, the loss of the air-conditioning efficiency of indoor air conditioning can be suppressed, and the outdoor and indoor air can be ventilated.
According to the heat exchanger 100 provided with the heat exchange element in the present embodiment, the concentration diffusion of the moisture absorbent contained in the partition member of the heat exchange element to the spacing member is suppressed during long-term use in a high humidity environment. In addition, the heat exchange performance can be improved.

DESCRIPTION OF SYMBOLS 1 Partition member, 2 Space | interval holding member, 3 Junction part, 4 1st flow path, 5 2nd flow path, 6 1st airflow, 7 2nd airflow, 10 Heat exchange element, 11 Resin layer of partition member , 12 Non-woven fabric base layer of partition member, 21 Resin layer of spacing holding member, 22 Non-woven fabric base layer of spacing holding member, 44 Air supply flow path, 45 Exhaust flow path, 46 Air supply blower, 47 Exhaust blower, 100 Heat exchange vessel

Claims (11)

A plurality of partition members, and a space holding member that forms a first flow path or a second flow path between the plurality of partition members and holds a space between the partition members,
The direction of the first flow path and the direction of the second flow path are formed to intersect each other,
The partition member has a laminated structure of a resin layer containing a hygroscopic agent and a nonwoven fabric base layer,
The spacing member has a laminated structure of a resin layer and a nonwoven fabric base layer,
The heat characterized in that the resin layer of the partition member and the nonwoven fabric base material layer of the spacing member are joined, and the nonwoven fabric base material layer of the partition member and the resin layer of the spacing member are joined. Exchange element. The heat exchange element according to claim 1, wherein the nonwoven fabric base material layer of the partition member or the spacing member includes at least one of a polyester fiber or a polypropylene fiber. The heat exchange element according to claim 1 or 2, wherein the hygroscopic agent contained in the resin layer of the partition member contains a deliquescent salt. The heat exchange element according to claim 3, wherein the deliquescent salt contains at least one of lithium chloride and calcium chloride. The joining of the resin layer of the partition member and the nonwoven fabric base material layer of the spacing member is joining by thermal bonding, and the joining of the nonwoven fabric base material layer of the partitioning member and the resin layer of the spacing member is by an adhesive. It is joining, The heat exchange element of any one of Claims 1-4 characterized by the above-mentioned. The heat exchange element according to claim 1, wherein the resin layer of the spacing member includes a flame retardant. The heat exchange element according to claim 1, wherein the resin layer of the spacing member includes a hygroscopic agent. The heat exchange element according to claim 7, wherein the hygroscopic agent contained in the resin layer of the spacing member contains a deliquescent salt. The heat exchange element according to claim 8, wherein the deliquescent salt contains at least one of lithium chloride and calcium chloride. The heat exchange element according to claim 1, wherein the spacing member has a corrugated shape. The heat exchange element according to any one of claims 1 to 10, the supply air blower that generates a flow of airflow from the outside to the inside of the first flow path, and the second flow path A heat exchanger comprising: an exhaust blower that generates a flow of airflow from the room to the outside.

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